CN107406103B - Wheel steering system - Google Patents

Abstract

A kind of wheel steering system, it constitutes are as follows: in each setting side clutch and side brake for a pair of and column-shaped driving system to a pair of of axle distribution power, with the operation of steering operation part, disconnect the side clutch of turning medial, and side brake is made to work, wherein to be provided with assisted clutch, for transmitting torque between a pair of driving system, and engaging force is set as variable；And assisted clutch operating parts, for increasing the engaging force of the assisted clutch, and be additionally provided with: restrain mechanism, for make side brake work and assisted clutch engaging force increase will not carry out simultaneously.

Description

Wheel steering system

Technical field

The present invention relates to a kind of side clutches, side brake formula wheel steering system.

Background technique

In the past, as the wheel steering system for being applied to caterpillar (such as combine harvester) etc., there is known The side clutch that constitutes as follows, side brake formula steering system: for the distribution power of right axletree (drive chain wheel shaft) to the left Pair of right and left driving system each be provided with side clutch and side brake, for example, there are it is disclosed in patent document 1 that The composition of sample.

As the side clutch, the operating parts of side brake formula steering system, there is known for example disclosed in patent document 1 Such turning-bar that can be fascinated to the left and right from in-line position.(if it is left-hand bend, then to the left to turning medial by the turning-bar Side) topple over to a certain degree, the side clutch of turning medial disconnects as a result, and the axle reduction of turning medial, vehicle is with turning radius Big state is shallowed turn.When toppling over turning-bar bigger to turning medial, in addition to the side clutch of turning medial is disconnected Except opening, the side brake of turning medial also starts, and the axle of turning medial significantly slows down and stops in turn, as a result, vehicle (christiania (Brake turn) when the axle of turning medial stops) being taken a sudden turn with the state that turning radius is small.

Existing technical literature

Patent document

Patent document 1: Japanese Unexamined Patent Publication 10-262417 bulletin

Summary of the invention

Problem to be solved by the invention

In the side clutch, side brake formula wheel steering system, due to will not in side clutch disconnect shape The axle of turning medial under state supplies power, and accordingly, there exist following problems: the axle of turning medial is easy by field face, road In face of the influence of the resistance (hereinafter, being set as " running resistance ") of the grounding parts of the vehicles such as crawler belt, tire, vehicle can be to be less than sometimes Turning radius contemplated by operator is turned.For example, attempting to shallow turn vehicle and by the turning-bar with small In the case that angle is toppled over, can there is following situation: dry Tanaka when driving, in side clutch disconnect in the state of turn It in the state of the degree that the axle of curved inside is also rotated, is able to carry out and is shallowed turn as being wanted, but in wet Tanaka's row When sailing, running resistance becomes larger, and the axle of the turning medial in the state of the disconnection of side clutch becomes difficult to rotate, turning half Diameter, which becomes smaller than, to be thought, vehicle will not be shallowed turn with desired big turning radius.

In order to solve this problem, it may be considered that: it is arranged between left and right driving above-mentioned system between the axle of left and right and makees It is slide limiting differential mechanism come the assisted clutch functioned, transmits a degree of torque between two driving systems to become State in other words two axles in left and right is made to become slow differential lockup state.It is furthermore desirable that can be with such as lower section Formula is operated: the engaging force of assisted clutch being set as variable, and auxiliary arbitrarily to adjust by each judgement of operator The engaging force (that is, driving torque between two or so driving systems) for helping clutch, so as to various according to pavement state etc. Condition changes to realize the turning under desired turning radius.

But when being provided with such assisted clutch, turning medial side brake work and turning medial During axle is braked, torque can be passed from the driving system in turning outside to the driving system of turning medial via the assisted clutch It is dynamic, therefore, it is easy to produce the burn etc. of the clutch as caused by frictional heat, durability is problematic.On the other hand, even if turning The side clutch of inside disconnects, and torque can also be transferred to the driving system of turning medial via assisted clutch, when in this state Under, when the side brake of turning medial works, still it is easy to produce the burning of the side brake of the turning medial as caused by frictional heat Wound.In this way, more increasing the engaging force (that is, more increase driving torque amount) of assisted clutch, engagement and side in assisted clutch Producible burn related with the durability of assisted clutch, side brake etc. in the case where the work while progress of brake Phenomenon is more significant.

The purpose of the present invention is to provide a kind of side clutches constituted in a manner of eliminating problem as above, side brake formula Wheel steering system.

The solution to the problem

Wheel steering system of the invention is constituted are as follows: for a pair of and column-shaped driving to a pair of of axle distribution power Each setting side clutch and side brake of system disconnect the side clutch of turning medial with the operation of steering operation part Device, and side brake is made to work.It is provided with assisted clutch in the wheel steering system, for being it in a pair of driving Between transmit torque, and engaging force is set as variable: and assisted clutch operating parts, for increasing the engagement of the assisted clutch Power, and being additionally provided with: restraining mechanism, and the work and the engaging force increase of assisted clutch for making side brake will not be simultaneously It carries out.

In the wheel steering system of first scheme of the invention, the containing mechanism is constituted are as follows: in the auxiliary clutch When device operating parts is operating as increasing the engaging force of the assisted clutch, the operation regardless of the steering operation part turns The side brake of curved inside does not work.

In the wheel steering system of the first scheme, it is provided with assisted clutch engaging force setup unit, being used for will The engaging force of the assisted clutch is set as specified value.The assisted clutch operating parts operated and be used to making the auxiliary from The engaging force of clutch increases since through the specified value set by the assisted clutch engaging force setup unit.

In the wheel steering system of alternative plan of the invention, the containing mechanism is constituted are as follows: in the steering operation When part is operating as that the side brake of turning medial is made to work, the operation regardless of the assisted clutch operating parts, the auxiliary The engaging force of clutch not will increase.

In the wheel steering system of the alternative plan, it is provided with assisted clutch engaging force setup unit, being used for will The engaging force of the assisted clutch is set as specified value.The assisted clutch operating parts operated and be used to making the auxiliary from The engaging force of clutch increases since through the specified value set by the assisted clutch engaging force setup unit.

Invention effect

The wheel steering system of side clutch, side brake formula of the invention is during the turning of vehicle, via auxiliary Clutch is connected from side clutch and is in the driving system on the outside of the turning of driving condition to the state disconnected in side clutch Turning medial driving system transmit torque, thereby, it is possible to avoid the excessive speed of the axle of the turning medial in soft terrain etc. Degree reduces.Moreover, the engaging force of assisted clutch is variable, the variation etc. as a result, regardless of such soil conditions can This engaging force could be adjusted to obtain always under the turning radius as setting by the variation etc. according to soil conditions Turning.Then, mechanism can be restrained by setting to avoid the work of the side brake of turning medial and connecing for assisted clutch The increase of resultant force carries out such situation simultaneously, to improve the durability of side clutch and assisted clutch.

Then, by the containing mechanism in the wheel steering system of the first scheme, no matter pass through steering operation part How is the Ackermann steer angle for operating to realize, even if operator can damage the durability of side clutch or assisted clutch Etc assisted clutch operating parts operation, can also avoid the work of the side brake of turning medial, therefore, can avoid auxiliary The such situation of side brake work during helping the engaging force of clutch to increase.

In addition, being provided with foregoing assisted clutch engaging force in the wheel steering system of the first scheme Setup unit, if as a result, operator not in order to assisted clutch engaging force increase and to assisted clutch operating parts into Row operation, then the engaging force of assisted clutch is remained through regulation set by assisted clutch engaging force setup unit Value, torque can be passed via the assisted clutch being set as engaging force in the state of the specified value from the driving system in turning outside It is handed to the driving system of the turning medial in the state that side clutch disconnects, is turned in soft terrain etc. as previously mentioned, can be avoided The excessive speed of the axle of curved inside reduces.Then, connecing for assisted clutch is judged as according to the state etc. of soil in operator When resultant force is insufficient for through specified value set by assisted clutch engaging force setup unit, assisted clutch operating parts The operating parts that can arbitrarily make engaging force increase since the specified value will be reserved as to apply.

On the other hand, by the containing mechanism in the wheel steering system of the alternative plan, no matter pass through auxiliary clutch How is the state that the operation of device operating parts increases the engaging force of assisted clutch, even if operator is carried out by steering operation part It can damage the cornering operation for making the side brake of turning medial work as the durability of side clutch or assisted clutch, The increase of the engaging force of assisted clutch will be avoided, therefore, can be avoided during the work of the side brake of turning medial The engaging force of assisted clutch increases such situation.

In addition, being provided with foregoing assisted clutch engaging force in the wheel steering system of the alternative plan Setup unit, if as a result, operator not in order to assisted clutch engaging force increase and to assisted clutch operating parts into Row operation, then the engaging force of assisted clutch is remained through regulation set by assisted clutch engaging force setup unit Value, driving system transmitting of the torque via the assisted clutch in the state that engaging force to be set as to the specified value, from turning outside To the driving system of the turning medial of side clutch when it is disconnected, as previously mentioned, can be avoided in the turning in soft terrain etc. The excessive speed of the axle of side reduces.Then, as long as no the side brake work for carrying out making turning medial by steering operation part The cornering operation made etc, then operator according to the state etc. of clutch soil be judged as the engaging force of assisted clutch for By the way that when deficiency, assisted clutch operating parts will be made for specified value set by assisted clutch engaging force setup unit It is applied for operating parts for can arbitrarily make engaging force increase since the specified value.

Detailed description of the invention

Fig. 1 is the skeleton diagram and Vehicular turn driver for applying the speed changer 1 of wheel steering system of the invention The hydraulic circuit diagram of group 2.

Fig. 2 is the top cross-sectional view of speed changer 1.

Fig. 3 is the side view partial cutaway view of speed changer 1.

Fig. 4 is the amplification top cross-sectional view of the part of the receiving side clutch shaft 5 in speed changer 1.

Fig. 5 is axle 4 in speed changer 1 to the amplification top cross-sectional view of the supporting part of gearbox 20.

Fig. 6 is the backsight section for the Vehicular turn driver group 2 of steering driver 34L, 34R being arranged in part Figure.

Fig. 7 is the rearview of Vehicular turn driver group 2, is the figure of the rear pseudosection comprising overflow valve 33.

Fig. 8 is the lateral sectional view of Vehicular turn driver group 2, is the figure for indicating the side elevational cross-section of overflow valve 33.

Fig. 9 is that the Vehicular turn indicated in gearbox 20 is formed with air-breather with the assembled portion of driver group 2 The partial perspective view of the speed changer 1 of embodiment.

Figure 10 is the rearview of turning-bar 11.

Figure 11 is the rear pseudosection for having the turning-bar 11 of resistance mechanism 170.

Figure 12 is to indicate the dump angle T of the turning-bar 11 showed by resistance mechanism 170 and be applied to turning-bar The curve graph of the relationship of 11 operation resistance R.

Figure 13 is the rearview for having the turning-bar 11 of resistance mechanism 180, and Figure 13 (A) is turned positioned at straight trip setting position To the figure of bar 11, Figure 13 (B) is the figure of the turning-bar 11 in the state of toppling over afterwards in order to carry out vehicle turning.

Figure 14 is that the vertical view for having the part of the receiving side clutch shaft 5 in the speed changer 1 of resistance (friction) mechanism 188 is cutd open Face figure.

Figure 15 (A) is the rearview for having the turning-bar 11 of resistance mechanism 189, and Figure 15 (B) is the B-B section of Figure 15 (A) Figure, Figure 15 (C) are to indicate the dump angle T of the turning-bar 11 showed by resistance mechanism 189 and be applied to turning-bar 11 Operation resistance R relationship curve graph.

Figure 16 is the rearview for having the turning-bar 11 for restraining mechanism 18.

Figure 17 is the perspective view for restraining mechanism 18.

Figure 18 is the first embodiment for indicating the connection construction about the operating mechanism for restraining mechanism and assisted clutch Figure, show restrain mechanism 18 vertical view partial cutaway view and assisted clutch engagement pressure setting bar (the following are " bars ") 12 with And the figure of the side view of assisted clutch pedal (the following are " pedals ") 13.

Figure 19 is the second embodiment for indicating the connection construction about the operating mechanism for restraining mechanism and assisted clutch Figure, shows the side view of the rearview and bar 12 and pedal 13 that have the turning-bar 11 of containing mechanism 18A of another way.

Figure 20 is the main view of the bar 12 and pushing member 81 in Figure 19.

Figure 21 is the 3rd embodiment for indicating the connection construction about the operating mechanism for restraining mechanism and assisted clutch Figure shows the side view for restraining the vertical view partial cutaway view and bar 12 and pedal 13 of mechanism 18.

Figure 22 is the main view of the bar 12 and arm 82 in Figure 21.

Figure 23 is the fourth embodiment for indicating the connection construction about the operating mechanism for restraining mechanism and assisted clutch Figure shows the side view for restraining the vertical view partial cutaway view and bar 12 and pedal 13 of mechanism 18.

Figure 24 is the main view of bar 12 in Figure 23, arm 82 and pedal 13.

Figure 25 is the 5th embodiment for indicating the connection construction about the operating mechanism for restraining mechanism and assisted clutch Figure, shows the side view of the rearview and pedal 13 that have the turning-bar 11 of containing mechanism 18B of other modes, shows Turning-bar 11 is set as in-line position, assisted clutch is engaged into the state that pressure is set as minimum value.

Figure 26 is the rearview for restraining mechanism 18B, is that assisted clutch engagement pressure is set as the state of minimum value and will be turned It fascinates to bar 11 to the figure in the state of the clutch open position of side.

Figure 27 is the rearview for restraining mechanism 18B, is that turning-bar 11 is set as in-line position and connects assisted clutch Combined pressure increases to the figure in the state of limits value.

Figure 28 is the rearview for restraining mechanism 18B, is that assisted clutch engagement pressure is increased to the state of limits value and is incited somebody to action Turning-bar 11 fascinates to the figure in the state of the clutch open position of side.

Figure 29 is the speed changer for the actuator electronic control AA being adjusted as the engagement pressure having to assisted clutch 8 The skeleton diagram of the speed changer 1A of 1 embodiment.

Skeleton diagram when Figure 30 is the turning of speed changer 1A.

Figure 31 is the side view partial cutaway view of speed changer 1A.

Figure 32 is the main view sectional view of motor driver 141.

Figure 33 is the speed changer for the actuator electronic control AA being adjusted as the engagement pressure having to assisted clutch 8 The skeleton diagram of the speed changer 1B of 1 another embodiment.

Figure 34 is the side view partial cutaway view of speed changer 1B.

Figure 35 is the basic control flow journey figure of the speed changer 1A or 1B that are realized by controller 10.

Figure 36 is to indicate to carry out the input unit to controller 10 in the case where stopping brake using side brake Block diagram.

The skeleton diagram of speed changer 1A or 1B when Figure 37 is parking brake work.

Figure 38 is the control flow chart for the parking brake operation realized by controller 10.

Figure 39 is indicated to the defeated of the controller 10 for controlling speed changer 1A or 1B based on the detection of the heeling condition of vehicle Enter the block diagram of unit.

Figure 40 be by the detection of the heeling condition based on vehicle by the controller 10 of the speed changer 1A or 1B of control reality Existing control flow chart.

Figure 41 is that the assisted clutch for indicating that the actual value to the assisted clutch engaging force of automatic control is shown connects The figure of resultant force table 117.

Figure 42 is the perspective view for being attached to the turning-bar 11 of assisted clutch engaging force adjustment dial 113A.

Figure 43 is to indicate that the assisted clutch engaging force in the case where observation of the axis direction of turning-bar 11 adjusts scale The figure of disk 113A.

Specific embodiment

By Fig. 1 to Fig. 5 etc., the composition for the speed changer 1 for applying wheel steering system of the invention is illustrated.Become Fast device 1 has gearbox 20, is supported and is mutually arranged in pair of right and left axle 4L, 4R on same axle center by the gearbox 20 (being referred to as " axle 4 ").Axle 4 is by the driving as the vehicle as such as combine harvester with crawler type running device Sprocket shaft is applied.The position and direction of each member of formation, part in speed changer 1 as described below are with the long ruler of the axle 4 Very little direction is the left and right directions of speed changer 1 as premise.

As shown in Fig. 3, Fig. 5 etc., gearbox 20 includes that left outside shell 120L and right casing 120R (is referred to as " shell 120").As shown in Fig. 2, the upper support in gearbox 20 has input shaft 28 in the lateral direction.One distal process of input shaft 28 Out to the outside of gearbox 20.Belt wheel 28a is fixed in this one end of input shaft 28.Belt wheel 28a is constituted for by engine The output of prime movers (not shown) is transferred to the driven wheel of the tape drive mechanism of input shaft 28.On the top of gearbox 20, The interior speed change gear (not shown) for being equipped with the rotary power by input shaft 28 to drive.The speed change gear be, for example, fluid pressure type without Grade speed change gear.The output of speed change gear is transferred to distribution gear 22 via transfer gear train 29.

In the gearbox 20 of speed changer 1, the left and right parallel relative to axle 4 extends the side clutch shaft 21 of shape via axis It holds 21a and rotates freely ground axle suspension in gearbox 20.As shown in figure 3, the outer peripheral surface in each end in the left and right of side clutch shaft 21 The chimeric inner ring for having bearing 21a, gearbox 20 is fixed in the outer ring of bearing 21a.

In side, the left and right central portion of clutch shaft 21 is fixedly installed distribution gear 22.In gearbox 20, equipped with being used for It is 3L, 3R (being referred to as " driving is 3 ") from a pair of of the driving that a pair of axle 4L, 4R distribute power to the left and right of distribution gear 22.For Each driving in composition left and right is 3L, 3R, in gearbox 20, is mutually arranged and extends the left and right one of shape in the left and right on same axle center It is parallel relative to side clutch shaft 21 and pair of right and left axle 4L, 4R to jackshaft 24L, 24R (being referred to as " jackshaft 24 ") Ground setting, and ground axle suspension is rotated freely in gearbox 20.

Respectively via Fig. 4 it is equal shown in axle sleeve (bush) 5d, with left and right axis direction slide freely and relative rotation from Mode such as moves left device 5L in the left part attaching of the side clutch shaft 21 in the left side of distribution gear 22, in distribution gear The right part attaching of the side clutch shaft 21 on 22 right side moves right device 5R and (will move left and right device 5L, 5R and be referred to as " movement Device 5 (shifter) ").Hereinafter, 22 side of distribution gear is set as inside about each mobile device 5, it will be with 22 phase of distribution gear Anti- side is set as outside.It is formed with left side gear 23L in the right part for moving left device 5L, in the left end for moving right device 5L Portion is formed with right side gear 23R (left and right side gear 23L, 23R are referred to as " side gear 23 ").That is, in each mobile device 5 Side end is formed with side gear 23.

It is formed with clutch claw 6a in each end in the left and right of distribution gear 22, and in the side of each mobile device 5L, 5R in left and right The medial end of gear 23L, 23R are formed with clutch claw 6b.In this way, the clutch claw 6a of the left part by distribution gear 22 With the clutch claw 6b of left side clutch 23L, engagement type left side clutch 6L is formed, passes through the right part of distribution gear 22 The clutch claw 6b of clutch claw 6a and right side clutch 23R constitutes engagement type right side clutch 6R (by right and left side clutch 6L, 6R are referred to as " side clutch 6 ").

In side, the left and right end portions winding of clutch shaft 21 is equipped with pair of right and left spring 5a, and each mobile device 5 is by each spring 5a exerts a force to distribution gear 22.That is, each spring 5a is exerted a force to the direction for connecting each side clutch 6.It is outer in each axle sleeve 5d The outboard end of each mobile device 5 of side is tubular, is arranged around each spring 5a.In addition, as shown in figure 4, being bounded on each side clutch Device axis 21 is surrounded with the thrust washer 5b of the spring base of the inner end as bearing spring 5a, engaging in each mobile device 5。

Here, engaging in the side thrust washer 5b of mobile device 5 spring 5a the inner end with mobile device 5 It moves and moves, and generate and rub between thrust washer 5b in the case where thrust washer 5b is directly contacted, spring 5a, Thrust washer 5b can burn caused by the reason frictional heat and be easy abrasion.Therefore, in the embodiment shown in fig. 4, exist Each side clutch shaft 21 is added around being provided with self-lubrication without fuel feeding washer (collar) 5c in thrust washer 5b simultaneously makes between its inner end and thrust washer 5b between spring 5a.

It is moving left between outer (left side) side end of the tubular of device 5L and the left side of gearbox 20, composition has left side to make Dynamic device 7L is being moved right between outer (right side) side end of the tubular of device 5R and the right side of gearbox 20, and composition has right side to make Dynamic device 7R (left and right side brake 7L, 7R are referred to as " side brake 7 ").Each side brake 7 includes friction plate 7a, 7b and pressing Plate 7c.Friction plate 7a can not be sticked in the outboard end of the tubular of each mobile device 5 with the relative rotation, and friction plate 7b can not be opposite Rotatably it is sticked in each side in left and right of gearbox 20.Pressing plate 7c is fixed on each mobile device 5.

In the state that each mobile device 5, which is in the maximum sliding position of inside, connects each side clutch 6, pressing plate 7c is far from friction plate 7a, 7b, and friction plate 7a, 7b are also away from each other.The state is that the off working state of side brake 7 is (non-brake State).With mobile device 5 along side clutch shaft 21 overcome spring 5a slide to the left and right (side clutch 6 become disconnect State), the pressing plate 7c integrally moved with the mobile device 5 is close to friction plate 7a, 7b, finally, makes to rub by pressing plate 7c Wiping board 7a, 7b are crimped each other.The state is the working condition (on-position) of side brake 7.Friction plate 7a, 7b start to press each other After connecing, with the outside Slideslip of mobile device 5, the friction between friction plate 7a, 7b, which is pressed, to increase, and is additional to mobile device 5 The brake force of the side brake 7 of (that is, side gear 23 from distribution gear 22 far from the state of) increases.

In addition, as shown in figure 4, having the bolt 19 of oil mass sensing in the hole 20a of the gearbox 20 of speed changer 1.From side The axle center 21c of clutch shaft 21 to the root of friction plate 7a distance L1 than the distance L2 from axle center 21c to the center of hole 20a It is long.That is along the radial direction of side clutch shaft 21, the position of hole 20a than each side brake 7 friction plate 7a, 7b more Close to axle center 21c.By being equipped with the bolt 19 of oil mass sensing in such position, operator can suitably sense and be used for Oil mass needed for sufficient lubrication between friction plate 7a, 7b.Thereby, it is possible to prevent profit when being arranged obliquely because of gearbox 20 Lubricating oil is insufficient and generates the situation of the burn of side clutch 6 and side brake 7.

There is the pair of right and left rotation axis being extended in front-rear direction in inside and outside perforation shape pivot suspension in gearbox 20 30L, 30R (are referred to as " rotation axis 30 ").It is used in the Vehicular turn that the outside of gearbox 20 is equipped with the operation of mobile device 5L, 5R Driver group 2.The Vehicular turn uses driver group 2 to have pair of right and left steering driver 34L, 34R (system as hydraulic cylinder Referred to as " turn to and use driver 34 "), each rotation axis 30 is linked to from each piston rod 36 to be extended out with driver 34 that turns to Outer end.

On the other hand, being extended from each rotation axis 30 of the inside of gearbox 20 has fastened component (clamp etc.) 30a, It is sticked in each mobile device 5.By the rotation around axle center of rotation axis 30, fastened component 30a is with the axle center of the rotation axis 30 Center rotating, mobile device 5 is slided in left and right directions along side clutch shaft 21 as a result,.

It is fixedly installed left large diameter gear 25L in the right end of left jackshaft 24L, no matter moves left the sliding of device 5L such as What, which all engages with left side gear 23L always.In addition, being fixedly installed on the left path of left jackshaft 24L Gear 25L is engaged with the left large diameter gear 27L for being fixedly installed on left axletree 4L.In this way, passing through distribution gear 22, left side gear 23L, left large diameter gear 25L, left small-diameter gear 26L, left large diameter gear 27L are constituted from distribution gear 21 to left axletree 4L and are transmitted The left driving of power is 3L.

On the other hand, it is fixedly installed right large diameter gear 25R in the left end of right jackshaft 24R, no matter moves right device 5R Sliding how, which all engages with right side gear 23R always.In addition, being fixedly installed on right jackshaft 24R Right small-diameter gear 25R engaged with the right large diameter gear 27R for being fixedly installed on right axletree 4R.In this way, passing through distribution gear 22, the right side Side gear 23R, right large diameter gear 25R, right small-diameter gear 26R, right large diameter gear 27R are constituted from distribution gear 21 to right axletree The right driving that 4R transmits power is 3R.It should be noted that hereinafter, respectively by left and right large diameter gear 25L, 25R, left and right path tooth Wheel 26L, 26R, left and right large diameter gear 27L, 27R are referred to as " large diameter gear 25 ", " small-diameter gear 26 ", " large diameter gear 27 ".

As shown in Fig. 2 and Fig. 5, in each shell 120, accommodating each driving is in 3 as final reduction gear system The left and right outer end of the part of small-diameter gear 26 (that is, exterior portion of each jackshaft 24) and large diameter gear 27 is open, and The outboard end of each shell 120 is bonded to side cover 121 and each side cover 121 is anchored on each shell 120 by bolt 121a, with toilet cover The firmly opening.

The outboard end of each jackshaft 24 is pivotally supported via bearing 24a in each side cover 121, on the other hand, each jackshaft 24 Part between large diameter gear 25 and small-diameter gear 26 is pivotally supported via bearing 24b in each shell 120.It should be noted that each The medial end spline of jackshaft 24 is embedded in the center splined hole (boss hole) of each large diameter gear 25.In addition, each major diameter tooth The outboard end of wheel 27 is pivotally supported via bearing 27a in each side cover 121, and the medial end of each large diameter gear 27 is via bearing 27b It is pivotally supported in each shell 120.

Axle 4 is accommodated and is pivotally supported in wheel hub 122.The outboard end of axle 4 is prominent from the outboard end of wheel hub 122. By axle 4 as the crawler travel device of such as combine harvester driving splined shaft to apply in the case where, from the vehicle The outboard end of the axle 4 outstanding of axle housing 122 is fixedly installed drive sprocket 4a.The medial end of wheel hub 122 is flange The medial end of 122a, axle 4 are prominent from flange 122a.The outboard end of the part of the bearing support 27a of each side cover 121 is opened Mouthful, the medial end spline of axle 4 is embedded in by shell 120 and the major diameter being pivotally supported by side cover 122 via the opening The center splined hole of gear 27.The flange 122a of wheel hub 122 is engaged in the outboard end of side cover 121, to cover side cover 121 The opening, and flange 122a is anchored on side cover 121 by bolt 122b, wheel hub 122 is fixedly installed on side cover 121 as a result,.

122b looser a bolt separate flange 122a from side cover 121, the medial end of axle 4 is by from major diameter tooth as a result, Wheel 27 center splined hole extract, can keep be contained in wheel hub 122 in the state of by axle 4 from gearbox 20 simply It unloads.On the other hand, in the state that flange 122a holding is anchored on side cover 121,121a is loosered a bolt to make side cover 121 from outer Shell 120 separate, as a result, the inner end of large diameter gear 27 by from bearing 27b extract, in addition, the medial end of jackshaft 24 by from Bearing 24b and large diameter gear 25 are extracted, can be in integrated by axle 4, wheel hub 122, side cover 121, central axis 24, greatly Diameter gear 27 and bearing 24a, 27a are unloaded from shell 120.

In this way, axle 4 is unloaded from gearbox 20 individually and supports the shape of jackshaft 24 and large diameter gear 27 in holding Unloading axle 4 from gearbox 20 under state can simply carry out, and therefore, can simply carry out axle 4, jackshaft 4, big Diameter gear 27 and support they bearing maintenance and replacement etc..Therefore, can easily be done to formed have with it is current Other jackshafts 24 of the small-diameter gear 26 of the different number of teeth of the number of teeth of the small-diameter gear 26 in jackshaft 24 under state are more Change and to the number of teeth different from the number of teeth of large diameter gear 27 under current state other large diameter gears 27 replacement, And also the reduction ratio that driving is 3 can be suitably changed by the way that their combination is changed to other combinations.

Then, the relationship of the transmitting state of the position to the mobile device 5 in speed changer 1 and power is illustrated.Firstly, Fig. 1 shows the straight-going state of vehicle (state that left and right axle 4L, 4R are rotated with identical speed), the two side clutch 6L in left and right, 6R engagement, also, left and right two side brake 7L, 7R are disconnected, and it is in one that left and right two side gear 23L, 23R, which are with distribution gear 22, The state that body shape rotates freely.Therefore, the rotary force of distribution gear 22 can equably be passed in principle left and right axle 4L, 4R。

The state of the speed changer 1 of Ackermann steer angle is illustrated.It should be noted that here, aftermentioned auxiliary clutch Device 8 is to disconnect.In the case where making vehicle turn left from straight-going state shown in FIG. 1, it is maintained at device 5R will be moved right In the state of the position for engaging right side clutch 6R, outward, i.e., Slideslip moves left device 5L to the left.Left side clutch as a result, Device 6L is disconnected, and vehicle slowly turns left.

In turn, it is fixedly installed on and moves left the pressing plate 7c of device 5L and crimp friction plate 7a, 7b of left hand brake device 7L, Left axletree 4L is braked, and the turning radius of vehicle further becomes smaller.Finally, when the device 5L that moves left of Slideslip to the left reaches it When maximum sliding position, the left christiania braked completely to the left axletree 4L of turning medial is realized.

It should be noted that being maintained at the position for engaging left side clutch 6L device 5L will be moved left when turning right In the state of setting, outward, i.e. right side sliding moves right device 5R, and right side clutch 6R is disconnected as a result, and starts right side system Dynamic device 7R please refers to explanation when above-mentioned left-hand bend about the details of its state, and also omits diagram.

By Fig. 1 and Fig. 3 etc., the assisted clutch 8 in speed changer 1 is described in detail.In the right end of left jackshaft 24L Left large diameter gear 25L and right jackshaft 24R left end right large diameter gear 25R between, be folded with and engaging force be set as variable Assisted clutch 8.In the present embodiment, assisted clutch 8 is set as comprising that can not be sticked in left major diameter tooth with the relative rotation It takes turns the friction plate 8a of 25L and the friction plate clutch of the friction plate 8b of right large diameter gear 25R can not be sticked in the relative rotation, And engaging force is set as variable by the pressing degree by freely being adjusted between friction plate 8a, 8b outside gearbox 20.Pass through engagement (connection) assisted clutch 8 come realize power (torque) between left and right large diameter gear 25L, 25R, i.e., left and right driving system Transmitting between 3L, 3R.It then, is to be passed between 3L, 3R to the driving in left and right by the adjustment of the engaging force of assisted clutch 8 The amount of torque passed is adjusted.

Being additionally provided in assisted clutch 8 can be in the pressing structure outside the figure that the axis direction (left and right directions) of jackshaft 24 slides Part slides the pressing member by side to the left and right (hereinafter, being set as " clutch engagement side ") to make to crimp friction plate 8a, 8b (connect assisted clutch 8) or increase its crimping degree (that is, engaging force of assisted clutch 8), by the other side to the left and right (with Under, it is set as " clutch separation side ") it slides to reduce the crimp force of friction plate 8a, 8b, and in turn separate friction plate 8a, 8b (disconnecting assisted clutch 8).

Assisted clutch mobile device 9 is equipped in gearbox 20.Assisted clutch has shift fork axle with mobile device 9 9a and shift fork 9b.The shift fork axle 9a that left and right extends shape is sliding freely supported in gearbox 20 in left and right axis direction.It dials The one end of fork 9b is fixed in shift fork axle 9a.The other end of shift fork 9b is sticked in the pressing member of assisted clutch 8. In this way, making the crimping degree between friction plate 8a, 8b assist clutch by engaging Slideslip shift fork axle 9a to the clutch The engaging force of device 8 increases, by making the pressing force between friction plate 8a, 8b to the clutch separation Slideslip shift fork axle 9a Reduce, and assisted clutch 8 is made to separate (disconnection) in turn.Shift fork axle 9a is exerted a force by spring 9e to the clutch separation side.

There is rotation axis 17 in inside and outside perforation shape pivot suspension in gearbox 20.Rotation axis 17 in the outside of gearbox 20 Outer end is fixedly installed arm 16.On the other hand, half is formed in the inner end of the rotation axis 17 of the inside of gearbox 20 lack shape Cam surface 17a.The one end of shift fork 9b is formed as receiving the cam receiving surface 9d of cam surface 17a.In this way, by arm 16 with And rotation axis 17 etc., constitute the operating mechanism 15 for operating assisted clutch mobile device 9.

As shown in Figure 1, cam surface 17a is parallel with cam receiving surface 9d, in cam surface 17a and cam receiving surface 9d contiguity When state, shift fork axle 9a is configured at the maximum sliding position of the clutch separation side, and foregoing assisted clutch 8 is disconnected It opens.Then, make rotation axis 16 around its axis rotation tilt cam surface 16a (referring to aftermentioned relative to cam receiving surface 9d Figure 30 etc.), shift fork axle 9a makes assisted clutch 9 via shift fork 9b to clutch engagement Slideslip to slide with it as a result, The corresponding engaging force engagement of momentum.

Therefore, the left side clutch in turning medial for example is being disconnected in order to make vehicle turn left as described above When the state of device 6L, via assisted clutch 8, from right large diameter gear 25R large diameter gear 25L to the left, i.e., from right driving be 3R to Left driving is that 3L transmits torque corresponding with set engaging force, assigns certain drive to the left axletree 4L as turning medial Power.Even if being caused the left axletree 4L of turning medial to stop by running resistance beyond expection during the turn as a result, Situation under, also can slowly be turned with the differential state of contemplated such left and right axle 4L, 4R.

Then, it is carried out to based on the operation of turning-bar 11 come the process of the work of the side clutch 6, side brake 7 realized Explanation.As shown in Figure 10 etc., turning-bar 11 is constituted using following as its essential structure: by the hub 11a attaching of its cardinal extremity In on the pivot 51 in anterior-posterior horizontal direction, and centered on the axle center of pivot 51, left and right is freely rotated, and can be from its flip angle The in-line position that degree T is 0 respectively rolls to the left and right to be moved to maximum angle Tmax.It should be noted that will be from in-line position (flip angle Degree T=0) dump angle T to the left is set as left-leaning chamfer angle LT, it will be set as from the dump angle T of the in-line position to the right Right deviation chamfer angle RT.Under control of the steering realized by controller 10 as described later with driver 34, dress is moved left Setting 5L increases left-leaning chamfer angle LT and (outside) sliding to the left, Device 5R is moved right and makes with turning-bar 11 fascinates to the right from in-line position Right deviation chamfer angle RT to increase and (outer to the right Side) sliding.

From the in-line position to turning-bar 11 before the dump angle T of each side in left and right reaches T1, the side of turning medial from Clutch 6 all remains engaged with, i.e., two sides clutch 6L, 6R are remained engaged with, and keeps straight-going state.When dump angle T reaches T1, The side clutch 6 of turning medial disconnects.During making dump angle T increase to T2 from T1, the side clutch 6 one of turning medial It is straight to disconnect, but the side brake 7 of turning medial, still in idle state, the axle 4 of turning medial, which is in, can pass through inertia Power is come the state that rotates.

When dump angle T reaches T2, friction plate 7a, 7b of the side brake 7 of turning medial start to crimp.That is, turning The side brake 7 of inside is started to work.As dump angle T increases from T2 to maximum angle Tmax, the side braking of turning medial The crimping degree of friction plate 7a, 7b of device 7 increase, i.e., its brake force increases.Reach the time of maximum angle Tmax in dump angle T Point, friction plate 7a, 7b of the side brake 7 of turning medial are crimped completely, and the axle 4 of turning medial is reliably braked.

Then, by Fig. 1, Fig. 2, Fig. 6 to Fig. 8, the Vehicular turn is illustrated with the construction of driver group 2.Vehicle Steering driver group 2 is to assemble electromagnetic type directional control valve 32, the overflow with variable overflow pressure in oil circuit module 38 Valve 33 and pair of right and left steering are formed with driver (hydraulic cylinder) 34L, 34R.It should be noted that only being carried out in Fig. 1 Diagram is not also assembled in a pair of of check valve 39L, 39R (being referred to as " check valve 39 ") that Fig. 2, Fig. 6 are illustrated into Fig. 8 but To oil circuit module 38.

It is formed with parallel pair of right and left cylinder holes in oil circuit module 38, extends in each cylinder holes built-up piston 35, from piston 35 The spring 37 that the piston rod 36 and winding of setting are assemblied in piston rod 36 and exert a force to initial position to the piston 35, as a result, Pair of right and left is constituted to turn to driver (hydraulic cylinder) 34L, 34R.Two piston rods 36 extend out from oil circuit module 38, they Top be connected to the outer end of foregoing left/right rotation moving axis 30L, 30R.

The side for constituting the piston 35 of the opposite side of the piston rod 36 in the cylinder holes of each steering driver 34 becomes work Grease chamber 34a, in addition, the middle part in the axis direction of piston 35 is equipped with overflow port 34b.It is equipped in oil circuit module 38 and receives to come from Hydraulic pump 31 shown in FIG. 1 discharge oil pumping hole 38a, in addition, be equipped with for out of oil circuit module 38 to oil circuit module 38 The drain tap 38d of outside discharge oil.

It constitutes are as follows: flow into the oil from hydraulic pump 31 of oil circuit module 38 via as solenoid valve from oil inlet 38a Directional control valve 32 is transported to the work grease chamber 34a of left steering driver 34L, the working oil of right turn driver 34R Any of room 34a and drain tap 38d.In addition, constituting are as follows: from the left and right turn overflow port of driver 34L, 34R The oil of 34b collaborates via respective check valve 39 and conveys to drain tap 38d.

Pair of right and left steering is controlled with driver 34L, 34R based on direction of the command signal from controller 10 to electromagnetic type Valve 32 processed carries out position control, controls flowing of the oil relative to steering with the work grease chamber 34a of driver 34L, 34R as a result, from And control the elongation of piston rod 36.In this way, in the sense that being controlled based on the control of the solenoid of directional control valve 32 It says, turning to driver 34 (34L, 34R) is electronic control type driver.

Hereinafter, about each steering driver 34, the maximum for being arranged to that corresponding mobile device 5 is made to be in inside is sliding The state that the dynamic side position Lai Shi clutch 6 engages is set as the off working state of steering driver 34, will be arranged to make to move Device 5 is from the outside Slideslip of maximum sliding position of inside even the state of a little is set as turning to the work with driver 34 State.

As shown in Figure 1, directional control valve 32 is the directional control valve of three position suitching types, based on the finger from controller 10 Signal is enabled, is controlled by the demagnetization of the excitation of solenoid 32a, solenoid 32b in left-hand bend position L, passes through solenoid 32b's Excitation, solenoid 32a demagnetization and control in right-hand bend position R, be controlled in by the demagnetization of two solenoids 32a, 32b Neutral position N.

In directional control valve 32, when being located at left-hand bend position L, the left-hand bend work grease chamber 34a of driver 34L is connected It passes through pumping hole 38a and left-hand bend is set as working condition with driver 34L, also, by the right-hand bend working oil of driver 34R Room 34a is connected to reservoir port 38d and right-hand bend is set as off working state with driver 34R.In addition, being located at right-hand bend position When R, right-hand bend is connected to pumping hole 38a with the work grease chamber 34a of driver 34R, right-hand bend is set as work with driver 34R Make state, also, left-hand bend is connected to reservoir port 38d for left-hand bend driver with the work grease chamber 34a of driver 34L 34L is set as off working state.Then, when being located at neutral position N, by two turning drivers of pumping hole 38a and left and right The work grease chamber 34a of 34L, 34R, which are connected to reservoir port 38d and will control two turnings, is set as inoperative with driver 34L, 34R State.

As shown in fig. 6, directional control valve 32 is assembled in oil circuit module 38, in addition, being equipped with direction outside oil circuit module 38 The solenoid group 32c of control valve 32.Solenoid group 32c be embedded with two solenoid 32a shown in the hydraulic circuit diagram of Fig. 1, 32b.In order to receive command signal 32La, 32Ra from controller 10, solenoid group 32c is connected to control by harness 32d Device 10 processed.By receiving command signal 32Ls, solenoid 32a carries out excitation, by receiving command signal 32Rs, solenoid 32b It carries out excitation (referring to Fig.1).

On the other hand, as shown in Figure 10, being extended from the cardinal extremity hub 11a of turning-bar 11 has sector arm 52, in the sector The radiused edges of arm 52 a part setting it is fluted come as locking groove 52a.It is equipped near sector arm 52 A pair of of threshold switch 53, extrusion 53a exerted a force towards sector arm 52, with (the i.e. turning-bar 11) rotation of sector arm 52 and It is moved forward or back relative to locking groove 52a.When turning-bar 11 is located at the position of in-line position (dump angle T=0), two sides' The extrusion 53a of threshold switch 53 is embedded in locking groove 52a, and two threshold switch 53 are in the state closed as a result, and controller 10 is in valve When switch 53 is OFF, directional control valve 32 is set to neutral position N.

When making turning-bar 11 from in-line position to the left or when right side rotates, the extrusion 53a of the threshold switch 53 of a side is de- From locking groove 52a, retrogressing is pushed against by the arc edge of sector arm 52, the threshold switch 53 of a side becomes open state.By This issues command signal from controller 10 so as to any one excitation in solenoid 32a, 32b, and directional control valve 32 is switched to Left-hand bend position L or right-hand bend position R is turned to left and right with any of driver 34L, 34R work grease chamber 34a supply Oil from hydraulic pump 31.

On the other hand, such as it is also contemplated that threshold switch 53 is set as one like that by embodiment shown in Figure 16 as be described hereinafter It is a.

As shown in Fig. 1, Fig. 6 to Fig. 8, overflow valve 33 is variable overflow valve, is adjusted by the position adjustment of spring base 41 Thus the degree of compression of whole spring 43 simultaneously adjusts the overflow pressure defined by its degree of compression.Place is adjusted by the adjustment of the overflow pressure In the elongation of the piston rod 36 of the hydraulic unit driver 34 of working condition, that is, set the mobile device 5 of turning medial outward Slippage, and determine according to its slippage the brake force (the crimping degree of friction plate 7a, 7b) of side brake 7.

The construction of overflow valve 33 is described in detail.As shown in Figure 7, Figure 8, overflow valve 33 is assembled in oil circuit module in vertical shape 38.Overflow valve 33 includes: mouth component 40 is fixed on oil circuit module 38；Spring base 41 slides up and down and is sticked in a mouthful component freely 40 lower part；Piston 42 is slided up and down and is embedded in this mouthful of component 40 freely；And spring 43, it is disposed in spring base 41, The upper end is squeezed by piston 42, and lower end is squeezed by the bottom end inner surface of spring base 41.

It is formed with the suction inlet 33a of vertical in the upper end of mouth component 40, is formed in the middle part up and down of this mouthful of component 40 There is the outlet 33b of horizontal radial.Suction inlet 33a is connected to the overflow port of two steering drivers 34L, 34R shown in fig. 6 34b, outlet 33b are connected to the drain tap 38d via the oil circuit 38b being formed in oil circuit module 38.It needs to illustrate It is, although not shown into Fig. 8 in Fig. 6, as shown in Figure 1, in the overflow port for being located in each steering driver 34L, 34R The midway of each oil circuit between 34b and suction inlet 33a, be respectively equipped with prevent check valve 39L from the refluence to the side overflow port 38d, 39R。

42 upward sliding of piston, piston 42 closes suction inlet 33a, 33 valve closing of overflow valve as a result,.That is, even at work Grease chamber 34a is connected to the state of overflow port 34b by the sliding of the piston 35 of the steering driver 34 of either one, overflows from this Head piece 34b, which is discharged to the oil of overflow valve 33, will not be drained to drain tap 38d, and therefore, meeting is hydraulic in work grease chamber 34a Stroke pressure of the lower holding relative to piston 35.

On the other hand, 42 slide downward of piston, suction inlet 33a is connected to outlet 33b, 33 valve opening of overflow valve as a result,. That is, if being connected to overflow port by the sliding of the piston 35 of the steering driver 34 of either one in work grease chamber 34a The state of 34b, the then oil discharged from this overflow port 34b to overflow valve 33 can be drained to drain tap 38d.Therefore, work grease chamber Hydraulic in 34a can be reduced to the state that the stroke of piston 35 can not be made to further increase.

The spring 43 being located between piston 42 and the bottom end inner surface of spring base 41 is compressed spring, upwards to work 42 force of plug.The pressure of spring 43 is adjusted by adjusting the upper and lower position for the spring base 41 that can be slided up and down relative to mouth component 40 Contracting degree adjusts the overflow pressure of overflow valve 33 as a result,.

Moreover, fixed range (referred to as specified position) is vacated between the cardinal extremity and spring base 41 of spring 43, in spring base 41 not from external force when, spring 43 remains natural length, and as being explained in detail hereinafter, the state and remaining turns The stand up position of the turning-bar 11 for the state that the side clutch 6 of curved inside is connected is corresponding.

As shown in Figure 7, Figure 8, as the unit for moving up and down spring base 41, in oil circuit module 38 and in overflow valve 33 Lower section be equipped with lobe plate 44.Here, as shown in fig. 7, when from positive (back), the bottom end of spring base 44 outside Surface is downwardly projected in arc-shaped, and when from positive (back), matchingly with its shape, in the upper end of lobe plate 44 Portion is formed with the recess portion 44a of arc-shaped.The left and right sides part of recess portion 44a in the lobe plate 44 is cam, and is configured to: bullet The bottom end of spring abutment 41 is climbed up herein, and spring base 41 rises as a result,.

In oil circuit module 38 inserted with the cam pivot component 45 in front-rear direction with axle center, inner end is embedded in figure Axle sleeve 45a shown in 8, to be rotatably supported on the shaft in oil circuit module 38.In the oil circuit module 38 and in cam pivot Shaft component 45 is fixedly installed the lobe plate 44.The outer end of cam pivot component 45 is configured at the outside of oil circuit module 38, Cam-operated arm 46 is fixedly installed in the outer end.

It should be noted that in oil circuit module 38, being formed in the lower section of the oil circuit 38b as shown in Fig. 6 and Fig. 8 There is the oil circuit 38c parallel with oil circuit 38b, and two oil circuits 38b, 38c is made to be connected to drain tap 38d.

As shown in Fig. 7, Fig. 8, Figure 10, cam-operated arm 46 is linked to the sector arm of turning-bar 11 via link mechanism 50 52.Link mechanism 50 is by the connecting rod 47 of 52 side of sector arm, the connecting rod 49 of 46 side of cam-operated arm and by the connecting rod 47 and connecting rod The link arm 48 of 49 connections is constituted.The one end 47a pivot of connecting rod 47 is linked to sector arm 52, the other end 47b of connecting rod 47 Pivot is linked to the one end of link arm 48.The one end 49a pivot of connecting rod 49 is linked to the other end of link arm 48, connecting rod 49 the other end 49b pivot is linked to the top of cam-operated arm 46.Link arm 48 is linked to the two of connecting rod 47,49 in pivot Part between a end is supported on a pivot on pivot 48a.

Connecting rod 47 is pushed and pulled by the rotation of turning-bar 11, link arm 48 is turned centered on pivot support shaft 48a as a result, It is dynamic, connecting rod 49 is thus pushed and pulled, cam-operated arm 46 is rotated.In fig. 8, the operating position S and turning-bar of cam-operated arm 46 11 in-line position (dump angle T=0) is corresponding.Cam-operated arm 46 can from in-line position S upwards, rotated down, on The position Lm of side is corresponding with the state that the left-leaning chamfer angle LT of turning-bar 11 reaches maximum angle Tmax.On the other hand, straight trip position It is corresponding that the position Rm for setting the lower section of S with the Right deviation chamfer angle RT of turning-bar 11 reaches the state of maximum angle Tmax.

In the overflow valve 33 for being connected to turning-bar 11 as described above, from in-line position to the right or left side topple over turn To the dump angle T of bar 11 be T1 when, the position of spring base 41 be as make spring 43 keep natural length range boundary The specified position of position.On the other hand, in driver 34, work grease chamber 34a starts to connect for steering in the operating condition The sliding position (elongation of piston rod 36) of piston 35 when passing through overflow port 34b, which corresponds to, makes clutch claw 6b and distribution tooth The clutch claw 6a of wheel 22 when unloading i.e. disconnection side clutch 6 when mobile device 5 sliding position.

Therefore, in the case where making turning-bar 11 be poured onto angle T1 from in-line position, the time of the disconnection of clutch 6 in side Point, the oil to work in grease chamber 34a is by the overflow port 34b of the turning driver 34 of under working condition (turning medial) to overflow The suction inlet 33a of valve 33 discharges.Although spring 43 can be maintained here, spring base 41 is moved upward from the specified position Natural length, in the state of the applied force (i.e. overflow pressure) substantially 0 of spring 43, therefore, from overflow port 34b oil upon Suction inlet 33a is flowed into, piston 42 just therefore press and be pressed down immediately by the inflow of oil, and so that suction inlet 33a is connected to outlet 33b, 33 valve opening of overflow valve.Therefore, the stroke of piston 35 stops, and mobile device 5 rests on the disconnection of side clutch 6, and (side brake 7 is not yet Open) time point at sliding position.

After overflow port 34b is connected to work grease chamber 34a, the slave angle T1 of the dump angle T based on turning-bar 11 to Any setting in the range of maximum angle Tmax, and the movement based on spring base 41 are equivalent to applying to piston 42 to set The degree of compression of the spring 43 of reinforcing sets the overflow pressure of overflow valve 33.Therefore, the steering under working condition (turning medial) is used The piston 35 of driver 34 pushes mobile device 5 to make its sliding, until the oil pressure in work grease chamber 34a becomes in this way The overflow pressure of setting reaches the time point of overflow pressure and 33 valve opening of overflow valve, the cunning of piston 35 and mobile device 5 in the oil pressure It is dynamic to stop.If the dump angle T of turning-bar 11 at this time reaches T2 or more, the brake plate of the side brake 7 of turning medial Each other with crimping degree corresponding with this dump angle T crimping, brake force corresponding with this crimping degree can be acted in turning by 7a, 7b The axle 4 of side.

When the left turning angle LT of turning-bar 11 reaches maximum angle Tmax, the position of cam-operated arm 46 is Fig. 4 institute The position " Lm " shown, lobe plate 44 reach maximum to the upper pressure amount of spring base 41, the applied force (degree of compression) of spring 43, i.e. overflow The overflow pressure of valve 33 reaches maximum, moves left device 5L and reaches maximum outside sliding position, the brake force of left hand brake device 7L reaches To maximum.

Here, being constituted to the part of Fig. 2 and the assembly Vehicular turn driver group 2 shown in Fig. 9 in gearbox 20 There is the embodiment of air-breather 160 to be illustrated.It should be noted that the left and right directions of speed changer 1 and upper is shown in FIG. 9 Lower direction.

As shown in figure 3, being in front crowned shape in the front surface part for left and right shell 120L, the 120R for constituting gearbox 20 At the installation rib 130 for having the oil circuit module 38 for assembling Vehicular turn driver group 2.Screw thread is formed in installation rib 130 Hole 134.Oil circuit module 38 is anchored on gearbox 20 and being screwed into the bolt 38f of each threaded hole 134.

Installing rib 130 includes the first partition wall 130a and the second partition wall 130b.By 130 area defined quilt of installation rib First partition wall 130a and the second partition wall 130b are divided into the first Room 131, second Room 132 and third room 133.In gearbox 20 front surface part is formed with the intercommunicating pore 161 for being connected to the inside of gearbox 20 with the first Room 131.Moreover, in gearbox 20 Inside be formed with air induction port 20i (referring to Fig. 2).Air passes through communication port 161 and air induction port 20i and is fed to the The inside of one Room 131.

The connectivity slot 162 for being connected to the first Room 131 with second Room 132 is formed in the first partition wall 130a.At second point Next door 130b is formed with the connectivity slot 163 for being connected to second Room 132 with third room 133.Moreover, surrounding in installation rib 130 The part of third room 133 is formed with the air channel 164 and communication port 165 of slit-shaped.Air channel 164 makes third room 133 and speed change The external connection of case 20.It should be noted that can according to need the side setting communication port in installation rib 130 also to replace leading to Air drain 164.Communication port 165 is the external aperture being connected to for making third room 133 with gearbox 20.Court is equipped in communication port 165 Snorkel 166 upwards.Although being all shown in Fig. 9 to air channel 164 and snorkel 166 this two side, ventilate Device 160 at least has any one.

Then, to the mobile dress with so-called " flicking " in order to avoid mobile device 5 and to clutch when it is disconnected The related several embodiments of composition for setting 5 mobile imparting resistance are illustrated.It should be noted that " the bullet of mobile device 5 Open " refer to following phenomenon: when in side, clutch 6 is migrated from off-state to connection status, the clutch claw 6b of mobile device 5 with The clutch claw 6a of distribution gear 22 is not synchronous well and do not engage, and the clutch claw 6b of mobile device 5 is rotated through in journey Distribution gear 22 clutch claw 6a " flicking "." flicking " of the mobile device 5 can cause clutch claw 6a, 6b abrasion, Burn such problems of spring 5a.

The construction that resistance is assigned as the movement to mobile device 5 exists and assigns resistance to the rotation of turning-bar 11 Construction, the construction for assigning resistance relative to the sliding of side clutch shaft 21 to mobile device 5.Wherein, firstly, to as with to turn Resistance mechanism 170 shown in Figure 11 to the related first embodiment of construction of the mobile imparting resistance of bar 11 is illustrated.Resistance Force mechanisms 170 have linear fluid damper.It should be noted that can also have revolving fluid damper carrys out generation It replaces.Resistance mechanism 170 has cylinder 172, pivot 173, arm 174 and piston rod 175.Cylinder 172 is by by shell 172a and shell 172b is engaged and is formed, and is disposed in the vehicle in a manner of as frame, mud guard for being fixed on vehicle etc..In cylinder 172 Portion is sealed with oil or gas.

It is fixedly installed arm 174 on the top of piston rod 175, arm 174 is linked to turning-bar 11 via 173 pivot of pivot. When turning-bar 11 is toppled over to the left, left side of the piston rod 175 into figure is mobile, also, when turning-bar 11 is toppled over to the right, Right side of the piston rod 175 into figure is mobile.In cylinder 172, in the wall part of shell 172a, 172b that piston rod 175 is penetrated through It is not equipped with oil sealing 176a, 176b.

Compression chamber 171 is formed in the inside of cylinder 172.Fluid is filled in compression chamber 171.Compression chamber 171 include side from Clutch region Rn, right hand brake region Rfa and left hand brake device region Rfb.Form the internal perisporium on the boundary in these regions Position it is according to region and different according to the shape of the internal perisporium of cylinder 172.Specifically, it is formed in the internal perisporium of cylinder 172 right The bore of the hole 172e of the hole 172d and formation left hand brake device region Rfb of side brake region Rfa, which are greater than, forms side clutch The bore of the hole 172c of device region Rn and close to the outer diameter of piston portion 175c.

The piston portion 175c of piston rod 175 is at the middle part of piston rod 175 in flange shape part outstanding.In piston portion 175c is formed with damping hole 175d.Damping hole 175d is penetrated through from the right press surface 175e of piston portion 175c to left press surface 175f. In addition, the periphery wall surface 175h in piston portion 175c is equipped with oil sealing 176c.Piston portion 175c with toppling over for turning-bar 11 and It is moved together with piston rod 175.

Step 172f and step 172h are formed in the internal perisporium of cylinder 172.Using step 172f as boundary, the inside quilt of cylinder 172 It is divided into right hand brake region Rfa and side clutch region Rn.Using step 172h as boundary, the inside of cylinder 172 is divided into side Clutch region Rn and left hand brake device region Rfb.

In the case where piston portion 175c is in right hand brake region Rfa movement and piston portion 175c is in left hand brake device In the case that region Rfb is mobile, the fluid in compression chamber 171 is needed across damping hole 175d.Therefore, because being located at side clutch The piston portion 175c of region Rn is moved to the right and the right press surface 175e of piston portion 175c is made to enter right hand brake region Rfa When, the operation resistance for being applied to turning-bar 11 increases.On the other hand, in the piston portion because being located at right hand brake region Rfa When 175c is moved to the left and made the periphery wall surface 175h of piston portion 175c by step 172f, it is applied to the operation of turning-bar 11 Resistance reduces.The operation resistance for being applied to turning-bar 11 equally can be because in side clutch region Rn and left hand brake device region Rfb Between the piston portion 175c that moves and increase or reduce.

Right press surface 175e starts from the side clutch region Rn time point that brake area Rfa enters to the right and right side The starting point of clutch 6R cutting is consistent.Right press surface 175e starts from side clutch region Rn brake area Rfa to the right The time point of entrance refers to the position of right press surface 175e along the position in the direction moved and step 172f piston portion 175c Consistent time point.Left press surface 175f starts the time point entered from side clutch region Rn brake area Rfb to the left It is consistent with the starting point of left side clutch 6L cutting.Left press surface 175f starts from the side brake area to the left side clutch region Rn The time point that domain Rfb enters refers to the position of left press surface 175f along the position in the direction moved and step 172h piston portion 175c Set consistent time point.

It should be noted that reaching maximum value in outside (right side) slippage for becoming moving right device 5R and making right side Before dynamic device 7R plays the state of maximum braking force, the right press surface 175e of the piston portion 175c in the Rfa of right hand brake region It will not all be abutted with an end face 172i of the internal perisporium of cylinder 172.In addition, being slided in the outside (left side) for becoming left hand brake device 7L Before amount reaches maximum value and makes the state of left hand brake device 7L performance maximum braking force, the work in left hand brake device region Rfb The left press surface 175f of piston part 175c will not be abutted with the other end 172j of the internal perisporium of cylinder 172.

On the other hand, the situation mobile towards side clutch region Rn from right hand brake region Rfa in piston portion 175c Under, time point of the position consistency in the direction and step 172f moved in the position of right press surface 175e along piston portion 175c it Before, turning-bar 11 can all be applied operation resistance.Inhibit the rotation of turning-bar 11 by the operation resistance, therefore, can inhibit Right side clutch 6R is migrated from off-state to connection status.It can inhibit to move right device 5R " flicking " as a result,.Then, exist In the case that piston portion 175c is moved from right hand brake region Rfa towards side clutch region Rn, in the outer of piston portion 175c After peripheral wall surfaces 175h passes through step 172f, the operation resistance for being applied to turning-bar 11 is released.

In addition, in the case where piston portion 175c is mobile towards side clutch region Rn from left hand brake device region Rfb, The position of left press surface 175f turns along before the time point of the direction moved piston portion 175c and the position consistency of step 172h Operation resistance can be all applied to bar 11.Inhibit the rotation of turning-bar 11 by the operation resistance, therefore, can inhibit left side from Clutch 6L migrating from off-state to connection status.It can inhibit to move left device 5L " flicking " as a result,.Then, in piston In the case that portion 175c is moved from left hand brake device region Rfb towards side clutch region Rn, in the periphery wall surface of piston portion 75c After 175h passes through step 172h, the operation resistance for being applied to turning-bar 11 is released.

In this way, the disconnection of side clutch 6R is back to from the state that side brake 7 plays maximum braking force in mobile device 5 During the switching point (position that the turning angle T of turning-bar 11 is T1) of state and connection status, 170 pairs of resistance mechanism steerings Bar 11 applies operation resistance R (strictly speaking, operation resistance R increases, and reaches defined value Rh), slows down even mobile device 5 as a result, The direction for connecing side clutch 6 on sliding speed, the clutch claw 6b of mobile device 5R with will not generating " flicking " with distribution The clutch claw 6a of gear 22 is engaged.When clutch claw 6b engages (side clutch 6 is connected) with clutch claw 6b, until will Turning-bar 11 is back to before in-line position, will not all be applied steering resistence, in addition, conversely, make turning-bar 11 from straight trip (T=0) is poured onto before dump angle T1 for position, and will not being all applied operation resistance R, (strictly speaking, operation resistance R becomes most Small value R0), thus it is ensured that the rapid reaction of the side clutch 6 of the realization of fascinating by turning-bar 11 in the range of collapse.

The operation resistance R of the dump angle T of turning-bar 11 more than expression and the resistance mechanism 170 for being applied to turning-bar 11 Relationship be Figure 12 curve graph.

Then, to Figure 13 (A) as the related second embodiment of construction for applying resistance with the movement to turning-bar 11 And friction (resistance) mechanism 180 shown in Figure 13 (B) is illustrated.One embodiment of the resistance mechanism as turning-bar 11 Friction mechanism 180 has arm 181, extruded member 182, retainer 183, support rod 184, pivot 185, hub 186 and stretches bullet Spring 187.

The hub 186 for being formed in the middle part of support rod 184, which is surround, is set to pivot 185, and by pivot 185 to support rod 84 carry out pivot suspension.Support rod 184 can be rotated centered on the central axis 185c of pivot 185.The one of support rod 184 End is equipped with extruded member 182, is equipped with one end of extension spring 187 in the other end.The other end of extension spring 187 is fixed on The frame etc. of vehicle.

Arm 181 is assemblied in hub 11a in a manner of it can rotate according to the operation of turning-bar 11.Arm 181 is located at across hub 11a The opposite side of turning-bar 11.In arm 181 with fan shape, the central part at the edge of arc-shaped is compared with the part of its two sides Recess.The central part is known as non-model control region 181a, the part of these two sides is known as friction area 181b, 181c.It needs Illustrate, although not shown, but the turning-bar 11 of Figure 13 (A) and Figure 13 (B) also have set on Figure 10 turning-bar 11 this Left and right threshold switch 53L, 53R of sample, and have the mechanism switched over to their ON and OFF.

Draft helical spring 187 by make extruded member 182 towards arm 181 in a manner of pull support rod 184.As a result, to branch It holds bar 184 and applies the elastic force for rotating 184 around the pivot 185 of support rod.In other words, make extruded member to the application of support rod 184 182 elastic forces being moved upward.

Frame etc. of the retainer 183 relative to vehicle is fixed.It is less than angle T1's in the dump angle T of turning-bar 11 Under state, support rod 184 is contacted with retainer 183, as a result, extruded member 182 be located at the lower section of non-model control region 181a without It is contacted with arm 181.

With toppling over for turning-bar 11, in the state that side brake 7 works, extruded member 182 is contacted with arm 181, when When brake force releases, the contact with arm 181 is released.

Turning-bar 11 is toppled over, and reaches the time point of angle T1 in dump angle T as a result, extruded member 182 is relative to arm The contact start of 181 friction area 181b, 181c, therefore, the contact with retainer 183 of support rod 184 release.In turning-bar In the case that 11 topple over to the right, arm 181 is contacted in friction area 181b with extruded member 182.It is rolled to the left in turning-bar 11 In the case where, arm 181 is contacted in friction area 181c with extruded member 182.When arm 181 friction area 181b, 181c with When extruded member 182 abuts, friction can be generated between the edge and extruded member 182 of the arc-shaped of arm 181 therefore can be to Turning-bar 11 applies the operation resistance toppled over for inhibiting turning-bar 11.

After the dump angle T for the turning-bar 11 toppled over to the right from in-line position passes through T1, reach in dump angle T Before the maximum dump angle Tmax of right side, i.e., reaches maximum value in outside (right side) slippage for becoming moving right device 5R and make Before right hand brake 7R plays the state of maximum braking force, extruded member 182 is in friction area 181b and arc-shaped arm 181 EDGE CONTACT persistently applies fixed frictional resistance (operation resistance Rh shown in Figure 13) to arm 181.On the other hand, from straight Line position sets the dump angle T for the turning-bar 11 toppled over to the left by reaching the maximum flip angle in left side in dump angle T after T1 It spends before Tmax, i.e., reach maximum value in outside (left side) slippage for becoming moving left device 5L and sends out left hand brake device 7L Before the state for waving maximum braking force, extruded member 182 continues in the EDGE CONTACT of friction area 181c and arc-shaped arm 181 Apply fixed frictional resistance (operation resistance Rh shown in Figure 13) to arm 181.

It is rubbing in turning-bar 11 from arm 181 in the friction area 181b state contacted with extruded member 182 or from arm 181 The state that contact with extruded member 182 of region 181c is wiped to start to the left or in the case that right side is toppled over, in arm 181 and extruding structure Before part 182 separates, turning-bar 11 is all applied operation resistance (Rh).Then, it in non-model control region 181a and is squeezed in arm 181 Component 182 stand facing each other and after being separated with extruded member 182, arm 181 is left-handed go to in-line position during, become turning-bar 11 It is not applied the state of the operation resistance as caused by extruded member 182 (operation resistance is minimum value R0).

In this way, mobile device 5 from side brake 7 play maximum braking force state begin to return to side clutch 6 from Off-state to connection status migrate starting point during, friction mechanism 180 persistently to turning-bar 11 apply inhibit side clutch Device 6 inhibits " flicking " of mobile device 5L from off-state to the operation resistance of connection status migrated.

Then, the embodiment as the construction for applying resistance relative to the sliding of side clutch shaft 21 to mobile device 5 is right Resistance mechanism 188 shown in Figure 14 is illustrated.

Resistance mechanism 188 is equipped with friction portion 21f in the outer peripheral surface of the side clutch shaft 21 slided for mobile device 5.Friction Portion 21f has the coefficient of friction bigger than being not provided with the coefficient of friction of the outer peripheral surface of the side clutch shaft 21 of friction portion 21f.As The method of friction portion 21f is set, it may be considered that in side, the outer peripheral surface of clutch shaft 21 coats friction material, as cladding friction material The method of material, it may be considered that method, sprinkling or the method for friction material for being coated with liquid of the friction material of pasted sheet-shaped etc..Or Person, it is also contemplated that it is not provided with the friction material independently of side clutch shaft 21, and the outer peripheral surface of opposite side clutch shaft 21 itself The method for carrying out surface processing.It should be noted that, although Figure 14 carries out the left side clutch axis 21 equipped with friction portion 21f Diagram, but right side clutch axis 21 (not shown) also is provided with friction portion 21f in Figure 14.

As shown in figure 12, in mobile device 5 during mobile on side clutch shaft 21, in the inner circumferential of mobile device 5 When the axle sleeve 5d and friction portion 21f in portion are contacted, apply fixed resistance to sliding Rh to mobile device 5, axle sleeve 5d not with friction When portion 21f is contacted (when contacting with the part other than the friction portion 21f in the outer peripheral surface of side clutch shaft 21), apply resistance to sliding Minimum value R0.The position for the mobile device 5 that resistance to sliding changes between R0 and Rh corresponds to side clutch 6 in connection status The position migrated between off-state, the position that the dump angle T corresponding to turning-bar 11 is T1.

Make to disconnect side clutch 6 mobile device 5 outward (if mobile device 5 is to move left device 5L, It is initially that the resistance to sliding of minimum value R0 increases to fixed resistance to sliding Rh to the left) during mobile.Because of mobile device 5 move outward and make the time point of the contact start of the outer end 5d1 and friction portion 21f of axle sleeve 5d and disconnect this side clutch 6 Starting point it is consistent.That is, (clutch claw 6a, 6b engagement during mobile device 5 is slided but side clutch 6 also engages simultaneously During), resistance to sliding is minimum value R0, and clutch claw 6b will apply mobile device 5 and slide upon leaving clutch claw 6b Then dynamic resistance Rh during 5 outside Slideslip of mobile device, applies the resistance to sliding of fixed value Rh.Even if reaching By the terminal location for the outside Slideslip of mobile device 5 that the brake force that side brake 7 is applied to side clutch shaft 21 is maximum value Time point, the inner end 5d2 of axle sleeve 5d will not be located at the outside (left side in Figure 14) of friction portion 21f, axle sleeve 5d and friction Therefore 21f contact in portion remains to mobile device 5 and applies resistance to sliding Rh.

In the case where (being right side in Figure 14) is mobile inwardly for mobile device 5, in the contact of axle sleeve 5d and friction portion 21f Before the time point of releasing, resistance to sliding Rh all is applied to mobile device 5.By resistance to sliding Rh, side clutch 6 can be inhibited From off-state migrating to connection status.It can inhibit mobile device 5 " flicking " as a result,.In the clutch claw of mobile device 5 6b is engaged the time point started with the clutch claw 6a of distribution gear 22, and the outer end 5d1 of axle sleeve 5d passes through friction portion 21f, then, The resistance to sliding for being applied to mobile device 5 releases (resistance to sliding is minimum value R0).

It can be seen from the above explanation being applied to mobile device by the dump angle T of turning-bar 11 and by friction mechanism 188 The relationship of 5 resistance to sliding can show the dump angle T of turning-bar 11 shown in Figure 12 and be applied to the operation of turning-bar 11 The relationship of the value of resistance.

Then, to Figure 15 (A) as the related another embodiment of construction for applying resistance with the movement to turning-bar 11 And resistance mechanism 189 shown in 15 (B) is illustrated.

Resistance mechanism 189 includes stop mechanism 190.Stop mechanism 190 has sphere 193, for 193 sliding contact of sphere The shell 192 that plate portion 191 and sphere 193 holding opposed with its are used and the spring 194 as compression helical spring.In plate portion 191 are equipped with right side recess portion 191a and left side recess portion 191b.Right side recess portion 191a and left side recess portion 191b is from the surface in plate portion 191 The part of 191c recess.The frame of the vehicle equipped with speed changer 1, mud guard etc. are fixed in plate portion 191.

Shell 192 is fixed on turning-bar 11.Shell 192 includes hook portion 192a and cover 192b.Spring 194 is supported on cover The bottom of 192b.Sphere 193 is pressed by spring 194 towards cover 192b outside.In shell 192, hook portion 192a is fixed on turning-bar 11.When turning-bar 11 is toppled over, shell 192 is also moved together.Plate portion 191 is formed as arcuation, so as to shell 192 at this time Motion track is consistent.

In the case where turning-bar 11 is located at in-line position, sphere 193 is located at right side recess portion 191a and left side recess portion 191b Centre and be not embedded into any of which, connect with the surface 191c in plate portion 191.In addition, even if increasing in dump angle T Time point that is big and reaching angle T1, sphere 193 also connect with the surface 191c in plate portion 191.In the Right deviation chamfering of turning-bar 11 Degree RT reaches the time point of angle T2, and sphere 193 is embedded in right side recess portion 191a.

Reach the time point of angle T2 in the left-leaning chamfer angle LT of turning-bar 11, sphere 193 is embedded in left side recess portion 191b. In the case where dump angle T is that angle T2 or more and turning-bar 11 are further toppled over, sphere 193 is from right side recess portion 191a or a left side Side pocket 191b climbs the surface 191c of upper plate portion 191 and then secondary moves on the 191c of surface.Only to make to be embedded in right side recessed In the case that the sphere 193 of portion 191a or left side recess portion 191b climb the surface 191c of upper plate portion 191, operated by Cai Huixiang operator 11 application value Rh of turning-bar operation resistance R.

In the state that in left and right, side brake 7L, 7R play maximum braking force, sphere 193 is contacted with surface 191c.Sphere 193 on the 191c of surface when sliding, and applies the operation resistance R of minimum R0 to turning-bar 11.

In this way, mobile device 5 from side brake 7 play maximum braking force state begin to return to side clutch 6 from Off-state to connection status when migrating starting point, resistance mechanism 189 before this migrates starting point in a flash to steering Bar 11 applies the operation resistance migrated for inhibiting side clutch 6 from off-state to connection status, prevents " the bullet of mobile device 5 It opens ".

Then, it presses setting operation unit and engagement pressure to increase operating unit the engagement of assisted clutch 8 to be illustrated. As shown in Figure 1, being equipped with assisted clutch engagement pressure setting bar (hereinafter simply referred to as " bar ") in the vehicle for having speed changer 1 The 12 setting operating parts pressed as the engagement of assisted clutch 8.The arm 16 is to corresponding with the operating position of bar 12 Position rotation, as a result, control assisted clutch mobile device 9 position, and by friction plate 8a, 8b of assisted clutch 8 it Between crimping degree be set as with by the corresponding value of value set by bar 12.

Moreover, as shown in Figure 1, the vehicle for having speed changer 1 be equipped with assisted clutch engagement pressure increase pedal (with Under, it is only called " pedal ") 13, so as to increase assisted clutch engagement pressure arbitrarily since through value set by bar 12 Greatly.Pedal 13 is connected mechanically to assisted clutch with the arm 16 of 9 control of mobile device using link mechanism 14.As this The operational version of pedal 13, such as: in the case that vehicle falls into miriness during the turn, via by set by bar 12 Engagement crimping close assisted clutch 8, from turning outside driving be 3 to side clutch 6 disconnection in the state of turning medial Driving be 3 transmitting driving forces, but in the engagement for the assisted clutch 8 for feeling to set herein pressure, the transmission capacity of power is insufficient Be detached from it is muddy when, peremptorily pushes pedals 13, and increase the engaging force of assisted clutch 8 according to its tread-on quantity Greatly.

In the embodiment shown in Figure 18, the non-retainer 68 for trampling position for limiting pedal 13 is set as movable up and down, And this is controlled based on the detection of the operating position of bar 12 and by the electronic control type driver 67 controlled by controller 10 The position of movable stop 68.The connection construction of bar 12, pedal 13 and arm 16 in the embodiment of the Fig. 7 is described in detail.

The hub 13a for being formed in cardinal extremity of pedal 13 is secured to the pivot 70 in the axle center with left and right directions, and with pivot 70 Centered on freely up and down rotate.To construct as follows: arm 13b has been extended downward from hub 13a, when pushes pedals 13 make it When decline, arm 13b is rotated forwards.The dead astern of arm 13b is provided with outside line seat 63, arm 13b top (lower end) with Spring 64 is folded between outside line seat 63.Spring 64 rearward exerts a force to arm 13b, (non-to trample position upwards to pedal 13 as a result, Set) force.Trampling for pedal 13 overcomes the spring 64 to carry out, and when releasing to pedal 13 when trampling, pedal 13 passes through spring 64 applied force, which is rotated upwards and is back to, non-tramples position.

It is also equipped with outside line seat 65 near arm 16, is respectively fixed with the both ends of outside line 62 in outside line 63,65.In outside line 62 inserts have interior lines 61, and the one end 61a from the interior lines 61 that the one end for the outside line 62 for being fixed on outside line seat 63 extends out Pivot is linked to arm 13b, the other end of the interior lines 61 to extend out from the other end for the outside line 62 for being fixed on outside line seat 65 61b pivot is linked to the top of arm 13b.In this way, by interior lines 61, outside line 62 and outside line seat 63,65, constitute by pedal 13 with The link mechanism 14 that arm 16 connects, when pushes pedals 13, arm 13b overcomes spring 64 to rotate and pull interior lines 61, as a result, Make arm 16 to the augment direction rotation of the engagement pressure of assisted clutch 8.

The hub 12a of 12 its cardinal extremity of bar is secured to the pivot 71 of left and right directions, can rotate before and after pivot 71 as a result,.Bar 12 inserts, can be in the front end of bar guiding groove 19 to rear end for example set on the guiding groove of bar in the front-back direction 19 of the console of vehicle In the range of rotate.In this way, its front end position will be become before and after the bar 12 limited by bar guiding groove 19 in slewing area The operating position for the bar 12 set is set as the operation for being set as minimum value (such as 0) for the engagement pressure by assisted clutch 8 The operating position for becoming the bar 12 of back-end location is set as be used for will be auxiliary by " minimum engagement pressure setting position Cmin " of position " the maximum engagement pressure setting position of the operating position for the maximum value for helping the engagement pressure of clutch 8 to be set as in the setting range of bar 12 Set Cmax ".That is, being constituted using following: bar 12 being rotated backward, as a result, the engagement buckling of set assisted clutch 8 It is high.

In bar guiding groove 19, by the operating position shape of bar 12 corresponding with each setting value for engaging pressure of assisted clutch 8 At the notch (sawtooth) for having stop.In the engagement pressure for setting assisted clutch 8, hand is placed on bar 12 and makes it by operator It is rotated along guiding groove 19 to be configured at the corresponding operating position of engagement pressure with target.It is formed in here, being engaging in bar 12 The notch of the operating position, even if hand leaves bar 12 as a result, which can also be fixed on the operating position.As long as in this way, bar 12 It is fixed in the operating position and pedal 13 is trampled into position set on non-, then the engagement pressure of assisted clutch 8 will be maintained at Setting value corresponding with the operating position of bar 12.In the case where changing the engagement pressure of assisted clutch 8, leave bar 12 originally Operating position notch and to other operating positions rotate the bar 12 by the bar 12 engaging in other operating positions pair The notch answered.

The position-detection sensor 66 of the turned position (operating position) of detection bar 12 is equipped near bar 12.Control Device 10 sends command signal to driver 67 based on the detection signal of position-detection sensor 66, and driver 67 is believed according to the instruction Number retainer 68 is positioned.It is to pass through at this time by the position that the pedal 13 that spring 64 exerts a force upwards is crimped on retainer 68 The non-of pedal 13 in the state of the engagement pressure of assisted clutch 8 set by bar 12 tramples position.By auxiliary set by bar 12 Help the engagement pressure of clutch 8 bigger, the position of retainer 68 is lower, non-defined by the retainer 68 as the position to trample The position of the pedal 13 of position is also lower, and the engagement pressure of assisted clutch 8 also can be via link mechanism 14, arm 16 and mobile dress Set 9 and higher.

Pedal 13 is set to the non-assisted clutch 8 trampled in the state of position in this way, setting by the operation of bar 12 Engagement pressure, but when feeling that this engagement pressure is insufficient, operator since this it is non-trample position pushes pedals 13, assist as a result, The engagement pressure of clutch 8 increases to value corresponding with the tread-on quantity of pedal 13 since through value set by bar 12.

As previously mentioned, when being operated to the turning-bar 11 for vehicle turning, the system of the side brake 7 of turning medial The crimping degree of movable plate 7a, 7b depend on the setting of dump angle T of the turning-bar 11 in the range of T2~Tmax.At this point, turning The side clutch 6 of inside disconnects, but when the engagement for setting assisted clutch 8 by bar 12 is pressed, side brake 7 can to via It is 3 a part of driving force come the driving of the turning medial driven is 3 progress that assisted clutch 8, which receives the driving in turning outside, Braking.Here, the driving that driving force is further transferred to turning medial is 3, to side brake in the case where pushes pedals 13 7 resistance increases, become easy side brake 7 friction plate 7a, 7b and assisted clutch 8 friction plate 8a, 8b this two Person generates burn.On the other hand, the scene as pushes pedals 13, it is contemplated that the case where be: the rotation of the axle 4 of turning medial Rotary speed is lower than the speed of imagination, that is, compared with further opening side brake 7 in this state, or even also to improve Assisted clutch 8 engagement pressure come increase from turning outside driving be 3 driving to turning medial be 3 power transmitting Amount, to attempt the rotation speed of the axle 4 of raising turning medial.

Therefore, containing mechanism 18 shown in Figure 16 to Figure 18 is set in turning-bar 11, in case pedal 13 is trampled and side system The work of dynamic device 7 carries out (that is, when the side in them carries out, another party not will do it) simultaneously.By Figure 16 to Figure 18's Embodiment is illustrated the construction of the containing mechanism 18.Mechanism 18 is restrained by being set to the extrusion 54 of the sector arm 52, limiting Component 55 and pivot member 56 processed etc. are constituted.Limiting member 55 is equipped near turning-bar 11, the limiting member 55 warp Pedal 13 is connected to by link mechanism 60, limiting member 55 and trampling for pedal 13 are linkedly switched to limitation steering as a result, The state of bar 11 fascinated.

As shown in figure 16, pivot member 56 is provided near turning-bar 11.Pivot member 56 is to be fixedly installed on Between bracket 56b, 56b of the horizontal plate a pair of up and down of the wall of the driver's cabin of vehicle etc. made of the pivot 56a of sandwiched vertical. Limiting member 55 has the hub 55c of vertical.The limiting member 55 the side of hub 55c in parallel shape be extended have it is upper next To limiting unit 55a, 55b of horizontal plate.Moreover, the limiting member 55 is in the other side of hub 55c, i.e., across pivot 56a The side opposite with limiting unit 55a, 55b is extended the arm 55d for having horizontal plate from hub 55c.

On the other hand, the pivot for being integrally formed at the sector arm 52 of turning-bar 11 is linked in the link mechanism 50 The part state that is formed as extending horizontally when turning-bar 11 is set to in-line position of one end 47a of connecting rod 47 prolong Extending portion 52b, and the extrusion 54 that can extrude the limiting unit 55a or 55b of the limiting member 55 is equipped in its top end part.It will turn The position of extension 52b from in-line position to bar 11 and extrusion 54 when being configured at are in above-below direction are as follows: upper and lower limiting unit The position of middle between 55a.

In addition, in this embodiment, being constituted using following: when the right-hand bend for vehicle rotates turning-bar 11 to the right When, extension 52b and extrusion 54 rotate upwards, when the left-hand bend for vehicle rotates turning-bar 11 to the left, Extension 52b and extrusion 54 rotate downwards.Therefore, the limiting unit 55a of upside is for limiting turning-bar 11 from straight trip position Rotation to the right is set, the limiting unit 55b of downside is for limiting the rotation of turning-bar 11 to the left from in-line position, but the steering The left-right rotation direction of bar 11 and the relationship of upper and lower limiting unit 55a, 55b may be reversed.

Conversely, being located at the top of the limiting unit 55a of upside or the lower section of the limiting unit 55b positioned at downside in extrusion 54 In the case where, i.e., in the case where except the range between upper and lower limiting unit 55a, 55b, extrusion 54 and sector arm 52 Extension 52b will limit the rotation of upper and lower limiting unit 55a, 55b towards sector arm 52.Company as described later is limited as a result, It is connected to trampling for the pedal 13 of limiting member 55.

Outside line seat 59 is provided near the arm 55d of limiting member 55, the one end of outside line 58 is fixed on outside line seat 59, On the other hand, the outside line seat 63 is fixed in the other end of outside line 58.Interior lines 57 are inserted through outside line 58.Interior lines 57 are from being fixed on The one end of the outside line 58 of outside line seat 59 extends out, and one end 57a pivot is linked to the top of arm 55d.On the other hand, Interior lines 57 extend out from the other end for the outside line 58 for being fixed on outside line seat 63, and its other end 57b pivot is linked to and steps on The arm 13b of plate 13.In this way, composition connects limiting member 55 and pedal 13 by interior lines 57, outside line 58 and outside line seat 59,63 The link mechanism 60 connect.

It should be noted that in the embodiment shown in Figure 20, in outside line seat 63, outside line 58 is configured at the upper of outside line 62 Side, in the interior lines 57,61 for extending to arm 13b from the outside line seat 63, interior lines 57 are configured at the top of interior lines 61, but ShiShimonoseki on this System may be reversed.In addition, end 57b, 61b pivot of two interior lines 57,61 is linked to the side of arm 13b, but can also incite somebody to action Their pivots are linked to the other side of arm 13b, alternatively, the end 57b pivot of interior lines 57 can also be linked to the one of arm 13b Side, and the end 61b pivot of interior lines 61 is linked to the other side of arm 13b.

By the composition of link mechanism 60 as described above, with pushes pedals 13, interior lines 57 are pullled by arm 13b, limitation Arm 55d in component 55 horizontally rotates around the pivot 56a of vertical, upper and lower limiting unit 55a, 55b and it is horizontal in integrated Rotation.

Here, in Figure 16 into Figure 18, to the restriction cancellation position X and restriction site of upper and lower limiting unit 55a, 55b Y is shown.When upper and lower limiting unit 55a, 55b is located at restriction cancellation position X, sector arm 52 with turning-bar 11 together During rotation, extrusion 54 will not be extruded in the limiting unit 55a of the upside or limiting unit 55b of downside, that is, sector arm 52 It rotates unrestricted, therefore, turning-bar 11 can be made to rotate, until its dump angle T reaches maximum angle Tmax.Therefore, energy Enough make the lower work in the braking state of side brake 7 of turning medial.

When upper and lower limiting unit 55a, 55b is located at restriction site Y, when turning-bar 11 is poured onto some from in-line position When angle, extrusion 54 can be extruded in the limiting unit 55a of the upside or limiting unit 55b of downside, can not topple over turning-bar 11 more Big angle.That is, the rotation of turning-bar 11 and sector arm 52 will receive limitation.The extrusion 54 is extruded in the limiting unit of upside The dump angle T of turning-bar 11 when the 55a or limiting unit 55b of downside is the angle of the range in T1~T2.Although as a result, The side clutch 6 of turning medial disconnects, but the side brake 7 of turning medial will not be opened.

In addition, during upper and lower limiting unit 55a, 55b is located at restriction cancellation position X, in the flip angle for making turning-bar 11 It spends in the state of side brake 7 of the range to open turning medial that T reaches T2~Tmax, when in order to increase assisted clutch 8 Engagement pressure and when attempting pushes pedals 13, although limiting member 55 can rotating due to trampling because of pedal 13, the limitation of upside The limiting unit 55b limiting unit 55a of upside (for example, in the case where toppling over turning-bar 11 to the right) of portion 55a or downside It will receive the extension 52b of sector arm 52 and the obstruction of extrusion 54 and restriction site Y can not be reached.In this way, due to limitation The rotation of component 55 is hindered, and it is transmitted via link mechanism 60, can also make the rotation downwards of pedal 13 by To obstruction.As a result, in the case where the side brake of turning medial 7 is opened, generated auxiliary clutch is trampled by pedal 13 The increase of the engagement pressure of device 8 is restricted.

In Figure 18, following scheme is shown: pedal 13 squeeze retainer 68 and be located at it is non-trample position when, Upper and lower limiting unit 55a, 55b is configured at the restriction cancellation position X, tramples by pedal 13 to when trampling position D, upper and lower limit Portion 55a, 55b processed are configured at the restriction site Y.Here, as previously mentioned, the non-position of trampling of pedal 13 is by the behaviour based on bar 12 The positioning of the retainer 68 of work presses progress to the engagement of assisted clutch 8 in through range set by bar 12 to limit During setting, need to open side brake 7 in advance.Therefore, with pass through the assisted clutch 8 in range set by bar 12 The corresponding pedal 13 of maximum engagement pressure (being pressed by the way that bar 12 to be configured to engage obtained by maximum engagement pressure setting position Cmax) Position (the non-of pedal 13 defined by the retainer 68 that the lowermost position as being located at movable domain up and down is set tramples position) lower section Until maximum tramples position in the range of, set to position D is trampled.Even if in each implementation of aftermentioned Figure 19 to Figure 28 In example, position D is also trampled using the pedal 13 set in this way.

During the straight trip of vehicle or Ackermann steer angle, the side clutch 6 of turning medial disconnect but side brake 7 not The stage of unlatching increases when trampling pedal 13 to when trampling position D, the engagement of assisted clutch 8 is pressed, more than the setting of bar 12 Maximum value in range.Even if attempt that turning-bar 11 is made further to topple over since the state and side brake 7 is made to work, but Upper and lower limiting unit 55a, 55b of limiting member 55 is configured at restriction site Y, can not also make the dump angle T of turning-bar 11 from this Place starts to reach more than the range of T2, and side brake 7 will not be opened.

On the other hand, pedal 13 be located at it is non-trample position in the state of, upper and lower limiting unit 55a, 55b be located at limitation solution Except position X, when toppling over turning-bar 11 for vehicle turning and its dump angle T being made to reach the range of T2~Tmax, turn The side brake 7 of curved inside works and (becomes on-position).Even if attempting to trample from the state by pedal 13 to trampling position D With attempt improve assisted clutch 8 engagement pressure, extrusion 54, sector arm 52 extension 52b can also hinder limiting member 55 Rotation, upper and lower limiting unit 55a, 55b can not turn to restriction site Y, therefore, it is impossible to trample pedal 13 to trampling position D。

By composition as above, the value of the engagement pressure of assisted clutch 8 be located at can by bar 12 to set in the range of When, turning-bar 11 can be made to topple in the range of from dump angle T2 to maximum angle Tmax, so as to make turning medial Side brake 7 work.Then, by pedal 13 trample make assisted clutch 8 engagement press increase and be more than can In the case where the range set by bar 12, in restraining mechanism 18, limiting member 55 can hinder sector arm 52, extrusion 54 Rotation, the dump angle T of turning-bar 11 can be limited in front of reaching T2 as a result, become the inoperative shape of side brake 7 State.On the other hand, make turning medial toppling over turning-bar 11 in the range of from dump angle T2 to maximum angle Tmax Side brake 7 work state when, restrain mechanism 18 in, sector arm 52, extrusion 54 can hinder limiting member 55 Rotation, pedal 13, which can be limited in, as a result, reaches before trampling position D, can not will attempt increase and be more than can by bar 12 come The assisted clutch 8 of the range of setting engagement pressure increase to this trample position D it is corresponding engagement pressure value.

As described above, using following constitute in the embodiment shown in Figure 16 to Figure 18: being arranged in turning-bar 11 and restrain Mechanism 18, and so that the containing mechanism 18 is connected to pedal 13, and the containing mechanism 18 and connecting rod machine via link mechanism 60 Structure 60 is constituted are as follows: topples over the engagement pressure operated and for making assisted clutch 8 in the turning-bar 11 for opening side brake 7 The stampede operation for increasing and be more than the pedal 13 of setting range tries concurrently to function when carrying out, to limit the behaviour of a side Make.

More than, to shown in Figure 16 to Figure 18 with as the steering operation unit for vehicle turning turning-bar 11, make For for set assisted clutch 8 engagement pressure operating unit bar 12 and for make the engagement pressure of assisted clutch 8 from The connection that setting value starts the pedal 13 increased constructs relevant embodiment (first embodiment) and is illustrated.In Figure 19 to figure Other embodiments (the second to the 5th embodiment) relevant to such connection construction are shown in 26.Hereinafter, to these implementations Example is illustrated.It should be noted that in the attached drawing for indicating each embodiment, to before the explanation of this embodiment into Gone explanation the identical component of component or part or part or component with the same function or part, assign identical Appended drawing reference, and they are omitted the description in principle.

Firstly, being illustrated to second embodiment shown in Figure 19 and Figure 20.In this embodiment, pass through driver 67 The position for limiting the non-retainer 68 for trampling position of pedal 13 come the detection to the operating position based on bar 12 controls Construction it is identical as the construction of the first embodiment of Figure 16 to Figure 18.

Extend sector arm 72 from the hub 11a of turning-bar 11, it is same as sector arm 52 above-mentioned, in the circular arc of sector arm 72 The a part at edge is formed in a manner of being embedded in when turning-bar 11 is set to in-line position for the extrusion 53a of threshold switch 53 The locking groove 72a of composition, in addition, the link mechanism 50 of the cam-operated arm 46 of the voltage-controlled system of the overflow for being linked to overflow valve 33 The end 47a pivot of connecting rod 47 is linked to sector arm 72.

In the present embodiment, as limiting turning-bar 11 and pedal 13 the containing mechanism operated while, another party The containing mechanism 18A of formula is set to turning-bar 11 with following constituted.It is formed in the other parts of the arc edge of sector arm 72 limited Slot 72b processed.Being configured near sector arm 72 can be around along the pivot branch relative to the rotating fulcrum axis as turning-bar 11 Hold the limiting member 74 that the extended pivot 73 in the parallel anterior-posterior horizontal direction of axis 51 rotates.Limiting member 74, which has, to be secured to The hub 74a of the outer peripheral surface of pivot 73 is extended restricted arm 74b and link arm 74c from hub 74a.It constitutes are as follows: in limitation arm The top pivot suspension of 74b has roller 75, and limitation arm 74b is rotated towards sector arm 72, and roller 75 is embedded in the limit of sector arm 72 as a result, Slot 72b processed.

On the other hand, there is the pushing member 81 for being arranged adjacent to pedal 13 in 70 pivot suspension of pivot.Pushing member 81 has There is hub 81a, and hub 81a is secured to pivot 70 in a manner of with the hub 13a of pedal 13 adjoining.Extruding is extended with from hub 81a Bar 81b.Pressure ram 81b is bent after the radially extending of pivot 70, and is then extended parallel to relative to pivot 70, and will The extension is configured at the front of the arm 13b of pedal 13.It should be noted that pushing member 81 by figure outside forcing unit Force, so that pressure ram 81b is pressed in the front end of arm 13b.

Link arm also is formed in a manner of extending out along another radial direction of pivot 70 from hub 81a in pushing member 81 81c.Outside line seat 78 is configured near the link arm 74c of the limiting member 74, in the link arm 81c of pushing member 81 Near be configured with outside line seat 79.It is fixed with the one end of outside line 77 in outside line seat 78, is fixed with outside line 77 in outside line seat 79 The other end.Interior lines 76 are inserted through outside line 77, from the interior lines 76 that the one end for the outside line 77 for being fixed on outside line seat 78 extends out One end 76a pivot be linked to the top of link arm 74c, extend from the other end for the outside line 77 for being fixed on outside line seat 79 The other end 76b pivot for the interior lines 76 come is linked to the top of link arm 81c.In this way, passing through interior lines 76, outside line 77 and outer Line seat 78,79 constitutes the link mechanism 80 for connecting the pushing member 81 of 13 side of the limiting member 74 of 11 side of turning-bar and pedal.

When declining pedal 13, arm 13b is rotated forwards, pushes the pressure ram 81b for being crimped on the front end of arm 13b.By This, pushing member 81 is rotated centered on pivot 70, and link arm 81c pulls link arm 74c via the interior lines 76 of link mechanism 80, Rotate limiting member 74 centered on pivot 73.Arm 74a is limited to rotate due to the rotation towards sector arm 72.When 13 quilt of pedal It tramples to the roller 75 of limitation arm 74b when trampling position D, rotated towards sector arm 72 and is embedded in the limiting groove 72b of sector arm 72.

Limiting groove 72b has a degree of width on the direction of the arc edge of sector arm 72, is embedded in limiting groove Roller 75 in the case where 72b can with the rotation of the sector arm 72 caused by the fascinating since in-line position of turning-bar 11 and Relative position in limiting groove 72b is mobile.The width of limiting groove 72b is set are as follows: from in-line position to the left or right side is inclined When the dump angle T of dynamic turning-bar 11 reaches the angle in the range of T1~T2, roller 75 reaches the end of limiting groove 72b, nothing Method further rotates sector arm 72.

Mechanism 18A, link mechanism 80 etc. are restrained as described above, constituting and having, as a result, when vehicle is kept straight on, in side brake 7 When turning in the state of not opening, trample when by pedal 13 to when trampling position D, the roller 75 of limiting member 74 can be embedded in sector The limiting groove 72b of arm 72 limits the rotation of sector arm 72, and the toppling over since in-line position of turning-bar 11 is limited in as a result, The side brake 7 of range before dump angle T2, turning medial does not work.

On the other hand, it is more than T2 and the side brake 7 of turning medial is made to work turning-bar 11 is poured onto dump angle T In the state of, the limiting groove 72b of sector arm 72 deviates the rotary motion trace of the roller 75 on the limitation top arm 74b.Even if attempting from the shape State starts to trample pedal 13 to position D is trampled, and roller 75 can be extruded in the arc-shaped edges of the sector arm 72 in addition to limiting groove 72b The rotation of edge, limiting member 74 is restricted, and pedal 13 tramples the range being limited in front of trampling position D as a result, can not Further increase the engagement pressure of assisted clutch 8.

Then, 3rd embodiment shown in Figure 21 and Figure 22 is illustrated.In this embodiment, it is set in turning-bar 11 Have and similarly restrain mechanism 18 with the containing mechanism of first embodiment shown in Figure 16 to Figure 18, on the other hand, be equipped with independently of The arm 82 of bar 12 and pedal 13,14 sandwiched of link mechanism being connect with the arm 16 for being linked to assisted clutch mobile device 9 Between the arm 82 and arm 16.Arm 82 is connected mechanically to bar 12 and pedal 13, and is rotated by the operation of bar 12, and passes through The rotation of arm 16 (the engagement pressure of change assisted clutch 8) is made by link mechanism 14, in addition, reaching in bar 12 by assisted clutch 8 Engagement be pressed in its setting range and be set as after the operating position of maximum value, rotated by trampling for pedal 13, and via Link mechanism 14 rotates arm 16.

It is formed with hub 82a in the cardinal extremity of arm 82, hub 82a is secured to pivot with the state adjacent with the hub 12a of bar 12 71, arm 82 can be rotated independently about pivot 71 in front-rear direction with bar 12 as a result,.

The pressure ram 12b to extend out from hub 12a is formed in bar 12.Pressure ram 12b is radially extended along pivot 71 It bends, is then extended parallel to relative to pivot 71, and the extension is configured to the front of arm 82 after out.

It is equipped outside line seat 87 near arm 82, is fixed with the end of the outside line 62 of link mechanism 14 in the outside line seat 87 And the end of the outside line 58 of link mechanism 60.It is inserted through outside line 62 and is linked to the position of assisted clutch mobile device 9 The interior lines 61 of the link mechanism 14 of control arm 16 extend out from outside line seat 87, and its end 61a pivot is linked to arm 82.This Outside, it is inserted through outside line 58 and the interior lines 57 for being linked to the link mechanism 60 of the arm 55d of limiting member 55 is extended from outside line seat 87 Come, and its end 57b pivot is linked to arm 82.

Moreover, being linked with the one end 83a of interior lines 83 in 82 pivot of arm, the other end 83b pivot of interior lines 83 is linked to The arm 13b of pedal 13.Interior lines 83 are inserted through outside line 84.The one end of outside line 84 is fixed on the outside line near the arm 13b of pedal 13 Seat 63.On the other hand, the outside line seat 12c formed in bar 12 is fixed in the other end of outside line 84.In this way, passing through interior lines 83, outer Line 84 and outside line seat 12c, 63 constitute the link mechanism 85 for connecting arm 82 and pedal 13.

The spring 64 for exerting a force upwards to pedal 13 is folded between the arm 13b and outside line seat 63 of pedal 13.Bullet The applied force of spring 64 is transferred to arm 82 via link mechanism 85, which is exerted a force in a manner of rotating forwards, and is pressed In the pressure ram 12b for the bar 12 for being configured at front.

It should be noted that being equipped with the upper end position in the slewing area for limiting the pedal 13 to be exerted a force upwards by spring 64 Retainer 86.Retainer 86 used in the embodiment shown in the Figure 21 and Figure 22 is fixed.It is squeezed in this only Pedal 13 when moving part 86 is configured at the position that the engaging force of assisted clutch 8 is set as to minimum value (for example, 0).

In the embodiment of the Figure 21 and Figure 22, in the setting for the engagement pressure for improving assisted clutch 8 using bar 12 In the case where value, bar 12 is rotated backward.With the rotation rearward of the bar 12, pressure ram 12b overcomes applying for spring 64 Reinforcing rearward pushes arm 82.The rotation rearward of the bar 12 is also transmitted to limiting member 55 via link mechanism 60, makes to limit Upper and lower limiting unit 55a, the 55b rotation of component 55 processed, but pressure setting position Cmin is being engaged to most from minimum based on bar 12 In the slewing area of the limiting member 55 of the rotation of big engagement pressure setting position Cmax, limiting unit 55a, 55b, which is located at, for example to be illustrated Restriction cancellation position X the side brake 7 of turning medial can be made to work without limitation on the rotation of sector arm 52.

It should be noted that arm 82 is rotated backward together with bar 12 and is rearward pushed during the rotation of the bar 12 The interior lines 83 of link mechanism 85, but since outside line seat 12c is integrally formed at bar 12, interior lines 83 can be together with outside line 84 It moves and is bent.Therefore, interior lines 83 will not relatively be moved relative to outside line 84, from outside line seat 63 to the arm 13b's of pedal 13 The length of interior lines 83 extended will not change.Therefore, pedal 13 can be maintained at be extruded in retainer 86 position it is motionless.That is, In the present embodiment, the link mechanism 14 for being linked to arm 16 is attached at arm 82 independently of pedal 13, in the operating process of bar 12 In, pedal 13 be held in it is corresponding with the operating position that the engagement pressure of assisted clutch 8 is set as minimum value (for example, 0) and The position squeezed with retainer 86.In other words, in the present embodiment, the operation regardless of bar 12 is squeezed with retainer 86 Position is always that the non-of pedal 13 tramples position.

It is fixed on by bar 12 from the minimum pressure setting position Cmin that engages to the maximum range for engaging pressure setting position Cmax In the state of interior any setting position, when pushes pedals 13 trample it from as the non-of the extrusion position with retainer 86 Position decline when, arm 13b is integrally rotated with pedal 13, and arm 13b pulls the interior lines 83 of link mechanism 85, as a result, by arm 82 to Rear rotation.

In this way, extruding of the arm 82 from the bar 12 in the state of being fixed on the setting position (in the notch of guiding groove 19 above-mentioned) Bar 12b is rearward separate, and then rotates backward.The rotation rearward of the arm 82 is transferred to arm 16 via link mechanism 14, To increase assisted clutch 8 engagement pressure direction make mobile device 9 work, on the other hand, also can via link mechanism 60 and It is transferred to limiting member 55, rotates upper and lower limiting unit 55a, 55b.Position D is trampled described in reaching when the pedal 13 trampled When, upper and lower limiting unit 55a, 55b of limiting member 55 reaches restriction site Y, the rotation of the sector arm 52 of turning-bar 11 is limited, The side brake 7 of turning medial is set not work.

On the other hand, when make the operating position of bar 12 from minimum engage pressure setting position Cmin to maximum engage pressure setting When changing in the range of the Cmax of position, the movement of bar 12 is transferred to limiting member 55 via arm 82 and link mechanism 60, limitation Component 55 rotates, still, as long as by pedal 13 be configured at it is non-trample position, upper and lower limiting unit 55a, 55b will be located at for example The state of the restriction cancellation position X of diagram, without reaching restriction site Y, without limitation on sector arm 52, turn of extrusion 54 It is dynamic.In this state, the dump angle T of turning-bar 11 is made to reach the range of T2~Tmax and make the side brake 7 of turning medial After working, when attempting to increase the engagement pressure of assisted clutch 9 when pushes pedals 13, limiting member 55 is also rotated with it, But it can be hindered by the extension 52a of sector arm 52 and extrusion 54, upper and lower limiting unit 55a, 55b can not turn to agretope Set Y.The rotation rearward of arm 82 can be also restricted because the rotation of the limiting member 55 limits, can not be via link mechanism 85 drop to pedal 13 tramples position D, also, increases in the engagement pressure for making assisted clutch 8 and trample position with pedal 13 It, can not be via 14 cursor 16 of link mechanism before setting the corresponding value of D.In this way, passing through pedal when side brake 7 works The increase of the engagement pressure of 13 assisted clutch 8 for trampling to carry out will receive limitation.

It should be noted that it is above-mentioned make bar 12 rotate and make arm 82 rotate when, in link mechanism 85, with interior lines 83 Together, the outside line seat 12c of the end of fixed outside line 84 is also integrally moved with bar 12, but rotates arm 82 in pushes pedals 13 When, interior lines 83 are relatively moved relative to outside line 84, and the outside line seat 12c of the end of fixed outside line 84 will not be moved with interior lines 83 Dynamic, therefore, during pedal 13 is trampled, bar 12 stops (engaging in the notch) setting position at this moment.Therefore, When releasing when trampling of pedal 13, pedal 13 can be rotated upwards because of the applied force of spring 64 and be returned to the non-position of trampling It returns, the interior lines 83 of link mechanism 85 are extruded as a result, are back to arm 82 and are extruded in the fixed bar 12 in the setting position The position of pressure ram 12b.In addition, arm 82 is back to the position as defined by the bar 12 for being located at setting position, as a result, arm 16,55d Also position corresponding with the setting position of bar 12 is back to via link mechanism 14,60.

Then, fourth embodiment shown in Figure 23 and Figure 24 is illustrated.In this embodiment, also with Figure 21 and The 3rd embodiment of Figure 22 is same, and using the arm 82 independently of bar 12 and pedal 13, and arm 82 links via link mechanism 14 In arm 16 and via link mechanism 60 be linked to restrain mechanism 18 limiting member 55.

That is, in the present embodiment, as shown in figure 24, in the pivot 70 of left and right horizontal shape, adjacently attaching has the hub of bar 12 The hub 13a of 12a, the hub 82a of arm 82 and pedal 13, arm 82 are configured between bar 12 and pedal 13.In bar 12, from hub 12a Being extended has pressure ram 12c, is bent and be configured at the part that left and right horizontal extends the front of arm 82.Another party Face is also provided with pressure ram 13c from hub 13a along radially extending for pivot 70 in pedal 13, pressure ram 13c bending and court Extend to its top in left and right horizontal direction, which is configured that in the front of arm 82, relative to the pressure ram The position of the left and right directions extension of 12c is staggered up and down, i.e., pressure ram 12c, 13c does not interfere respective rotation each other.

Be equipped with spring travel limitor 88 near the arm 13b of pedal 13, and the spring travel limitor 88 with Sandwiched spring 64 between arm 13b as a result, exerts a force to pedal 13 to the position squeezed with retainer 86 upwards.Arm 82 is by independence Exerted a force in a manner of rotating forwards in the forcing unit outside the figure of spring 64, as a result, with the pressure ram that is configured at immediately ahead of it 12c, 13c are squeezed.

Extruding when rotating backward bar 12 to increase the engagement pressure of assisted clutch 8, with 12 unitary rotation of bar Bar 12c rearward pushes arm 82.The rotation rearward of the arm 82 is transmitted via link mechanism 14,60 to arm 16,55d.At this During bar 12 and 82 unitary rotation of arm, pedal 13 is maintained at non-the stepping on the extruding of retainer 86 by the applied force of spring 64 Position is stepped on, therefore, pressure ram 13c also stays at the position, and arm 82 is rotated backward far from pressure ram 13c.

It is fixed on by bar 12 from the minimum pressure setting position Cmin that engages to the maximum range for engaging pressure setting position Cmax In the state of interior any setting position, make it from as the extruding position with retainer 86 when overcoming 64 pushes pedals 13 of spring Set it is non-trample position decline when, pressure ram 13c is integrally rotated backward with pedal 13.Here, reaching and leading in pedal 13 Before crossing that the pressure of engagement set by bar 12 is corresponding and trampling position, the rotation rearward of pressure ram 13c be used in fill up with It is discretely configured at the interval between the arm 82 at its rear, when pedal 13, which reaches this, tramples position, pressure ram 13c can be extruded in Arm 82.

Then, crowded when pedal 13 by the way that engagement pressure set by bar 12 is corresponding from trampling position and further declining Compression bar 13c rearward pushes arm 82.At this point, bar 12 is fixed on setting position, arm 82 can squeezing from the bar 12 for staying in the position Compression bar 12c is rearward separate.Pass through the rotation rearward of the arm 82, engagement pressure of the mobile device 9 to increase assisted clutch 8 Direction it is mobile, in addition, when the pedal 13 trampled reach it is described trample position D when, limiting member 55 limits turning-bar 11 The rotation of sector arm 52 makes the side brake 7 of turning medial not work.

On the other hand, by pedal 13 be configured at it is non-trample position during, make turning-bar 11 dump angle T reach T2 The range of~Tmax and after so that the side brake 7 of turning medial is worked, when the engagement pressure for attempting to increase assisted clutch 9 When pushes pedals 13, limiting member 55 is also rotated with it, but can be hindered by the extension 52a of sector arm 52 and extrusion 54, Upper and lower limiting unit 55a, 55b can not reach restriction site Y.The rotation rearward of arm 82 is also because of the rotation of the limiting member 55 It limits and is restricted, become can not to make pedal 13 to drop to trample position D and arm 16 can not be turned to and make to assist clutch The engagement pressure of device 8 increases to the state for trampling the corresponding value of position D with pedal 13.In this way, when side brake 7 works, It is restricted by the increase of the engagement pressure for trampling the assisted clutch 8 to carry out of pedal 13.

Then, the 5th embodiment shown in Figure 25 to Figure 28 is illustrated.As shown in figure 25, from being secured to anterior-posterior horizontal Side is extended with sector arm 90 to the hub 11a of the cardinal extremity of the turning-bar 11 of the pivot 51 of shape to the left and right, in the arc-shaped edges of sector arm 90 A part of edge is formed with locking groove 90a, and when turning-bar 11 is set to linear position, the extrusion 53a of threshold switch 53 can be embedding Enter to locking groove 90a.Embodiment shown in equal with Figure 16 is same, and threshold switch 53 is closed because extrusion 53a is embedded in locking groove 90a Make and break is closed to which directional control valve 32 is set to neutral position N, in addition, turning on the switch because extrusion 53a leaves locking groove 90a To which directional control valve 32 is set to left-hand bend position L or right-hand bend position R.By directional control valve 32 be set as turning position L or Be set as right-hand bend position R be by turning-bar 11 from in-line position to the left, either right side rotation sense determines Fixed (can also be determined based on the sensing of the rotation direction of cam-operated arm 46).

In addition, from the hub 11a of turning-bar 11, the other side is extended and has arm 91 to the left and right, has been provided projectingly promotion in arm 91 Sell 91a.Moreover, having upper and lower arm 93,94 in 51 pivot suspension of pivot, and arm 93,94 is another from pivot 51 to the left and right Side extends to side identical with arm 91.It is configured with the promotion pin 91a of arm 91 between upper and lower arm 93,94 and no matter turns To the rotation fixed pin 92 how all position is fixed of bar 11.Spring 95 is folded between the top end part of upper and lower arm 93,94., Upper and lower arm 93,94 is exerted a force toward each other by the spring 95, that is, by the promotion pin 91a and fixed pin 92 to clamping between the two Direction force.

In the present embodiment, it constitutes are as follows: toppling over turning-bar 11 to the right from in-line position (increases Right deviation chamfer angle RT Greatly), the arm 93 for rotating upside upwards as a result, toppling over turning-bar 11 to the left from in-line position (increases left-leaning chamfer angle LT Greatly), the arm 93 of downside is rotated downwards as a result,.It is described in detail.Arm 91 is rotated in integrated and turning-bar 11, such as Shown in Figure 26, when turning-bar 11 is rotated to the right from in-line position, the promotion of arm 91 pin 91a by the arm 93 of upside upwards Above push away.During this period, the fixed fixed pin 92 in position makes the arm 94 of downside rest on position when turning-bar 11 is located at in-line position It sets, in case the arm 94 of downside rotates upwards with the arm 93 of upside.On the other hand, although not shown, but as shown in Figure 26, as general When turning-bar 11 rotates to the left from in-line position, the promotion pin 91a of arm 91 pushes away down the arm 94 of downside downwards.In this phase Between, the fixed fixed pin 92 in position makes the arm 93 of upside rest on position when turning-bar 11 is located at in-line position, in order to avoid upside Arm 93 rotate downwards with the arm 94 of downside.

In this way, by turning-bar 11 from in-line position to the left or right side rotation, as a result, the top end part of upper and lower arm 93,94 it Between interval expand, spring 95 extend, towards arm 93,94 mutually exert a force.When leaving hand from in-line position to the right or left side When turning-bar 11 after rotation, pushed pin 91a above push away or under push away and the arm 93 rotated or 94 locking towards pin 92 is fixed Arm 93 or 94 rotates, and pin 91a is pushed to be pushed by the arm 93 or 94 of the rotation, and arm 91 is rotated together with pin 91a is pushed, and turns as a result, It is rotated to bar 11.Finally, as shown in figure 25, two arms 93,94 are back to the state that clamping pushes pin 91a and fixed pin 92, Turning-bar 11 is also returned to in-line position.

In the present embodiment, using the line components comprising interior lines 98, outside line 99 as be linked to Vehicular turn driving The link mechanism 50 of the cam-operated arm 46 of 33 control of overflow valve of device group 2.It should be noted that connecting rod machine shown in Figure 16 Structure 50 is following construction: rotating cam-operated arm 46 upwards by the rotation to the left of turning-bar 11, passes through steering The rotation to the right of bar 11 and rotate cam-operated arm 46 downwards, but as previously mentioned, the rotation direction of turning-bar 11 with It's not limited to that for the relationship of the rotation direction of cam-operated arm 46, and it is suitable that link mechanism 50 is configured to the rotation based on arm 93 or 94 Locality rotates cam-operated arm 46.

A side in arm 93,94 constitutes outside line seat to fix the end of outside line 99, another party's pivot in arm 93,94 Link the end of interior lines 98.In the present embodiment, the outside line seat 94a of the end of fixed outside line 99 is formed into (or fixed setting) Arm 94 in downside will be linked to the arm 93 of upside from the end 98a pivot for the interior lines 98 that outside line seat 94a extends out.

Moreover, the outside line seat 94a of the arm 94 in downside, is fixed with the outside line inserted for the interior lines 101 for being linked to pedal 13 102 end, interior lines 101 extend out from outside line seat 94a, and end 101a is fixedly installed in the both ends of limiting member 96 A side (being in the present embodiment lower end).Limiting member 96 be equipped between the both ends of the limiting member 96 direction ( It is roughly vertical direction in the present embodiment) the long hole 96a that is formed longlyer, it is embedded in long hole 96a prominent from the arm 93 of upside The banking pin 93a being arranged out.One of another party's (being in the present embodiment upper end) and vehicle in the both ends of limiting member 96 Partially spring 97 is folded between (the fixed position in position, such as a part of the wall of driver's cabin, instrument board).

As described above, using following construction: being provided with arm 93,94 and spring 95 etc. as making turning-bar 11 The turning-bar 11 being back in the present embodiment of the forcing unit of in-line position increases assisted clutch 8 as being used in Engagement pressure pedal 13 the containing mechanism trampling the work with side clutch 7 and will not carrying out simultaneously, have comprising limit structure The containing mechanism 18B of part 96 and spring 97, and be connected to the limiting member 96 for restraining mechanism 18B via link mechanism 100 Pedal 13.

Link mechanism 100 includes interior lines 101 and outside line 102.The one end of outside line 102 is fixed on the described of lower side arm 94 The outside line seat 63 near the arm 13b of pedal 13 is fixed in outside line seat 94a, the other end.Interior lines 101 are inserted through outside line 102, from outer The end 101a for the interior lines 101 that line seat 94a extends out upwards prolongs engaging in the lower end of limiting member 96 from outside line seat 63 The end 101b pivot for the interior lines 101 stretched is linked to arm 13b.

In addition, in the present embodiment, it is same as the first embodiment of Figure 16 to Figure 18, in the arm 13b and arm 16 of pedal 13 Between be folded with the link mechanism 14 comprising interior lines 61, outside line 62 etc..For with the relationship of bar 12, it may be considered that extremely with Figure 16 The first embodiment of Figure 18 is same, according to the setting pressed by bar 12 engagement of assisted clutch 8 come to restriction pedal 13 The position of the non-retainer 68 for trampling position changes.Or it is also contemplated that with the 3rd embodiment of Figure 21 and Figure 22, The fourth embodiment of Figure 23 and Figure 24 is same, and the retainer 86 of fixing shape is arranged, and no matter passes through bar 12 to assisted clutch 8 Engagement pressure setting how, the non-position of trampling of the pedal 13 squeezed with the retainer 86 is all set as fixed.No matter at which In a kind of relationship, the containing mechanism 18B in the present embodiment is constituted are as follows: no matter whether side clutch 7 works, in bar 12 from institute The auxiliary clutch obtained in the minimum engagement pressure setting position Cmin to the maximum opereating specification for engaging pressure setting position Cmax stated The engagement pressure of device 8 can all obtain.

The long hole 96a that the limiting member 96 in mechanism 18B has up and down direction is restrained, in long hole 96a along upper and lower To long hole 96a be sliding freely embedded be provided projectingly on upside arm 93 banking pin 93a.It is configured across long hole 96a Limiting member 96 upper and lower side in, in the locking end 101a for having foregoing interior lines 101 in the lower end, on the other hand, The locking one end for having spring 97 in the upper end.The other end of spring 97 is engaging in (such as the wall of driver's cabin) being fixed among vehicle Part.In this way, limiting member 96 moves up and down, spring 97 according to the movement of link mechanism 100 and the movement of arm 93 or 94 It is stretched according to the up and down motion of limiting member 96, allows the up and down motion of limiting member 96.

Figure 25, which is shown, to be configured at in-line position (dump angle T=0) for turning-bar 11 and pedal 13 is configured at non-step on The case where stepping on position.Upper and lower arm 93,94 is located at position corresponding with the in-line position of turning-bar 11, and being located in arm 93,94 should During position, the development length of the interior lines 101 from outside line seat 94a to the lower end of limiting member 96 is longest, limiting member Uppermost position in fig-ure in the range of 96 lower movements disposed thereon, spring 97 are the state most compressed, and banking pin 93a is connected to long hole The lower end of 96a.

When the state from Figure 25, pedal 13 is maintained at non-and tramples position, and to the right from in-line position by turning-bar 11 When fascinating, as shown in figure 26, limiting member 96 is maintained at position above-mentioned (spring 97 keeps the state most compressed), the arm of upside 93 are rotated up, and relative position of the limiting member 96a in long hole 96a is moved upward.In this case, making turning-bar 11 Before right turning angle RT reaches maximum angle Tmax, the banking pin 93a being moved upward will not be supported with the upper end of long hole 96a It connects, therefore, the engagement pressure of the right side clutch 7R of turning medial can be made to increase to maximum value, to be 3R and the right side by right driving Axle 4R is set as complete on-position.

On the other hand, shortened and length by the banking pin 93a risen that is rotated up of the arm 93 of upside in this way Therefore the distance of the upper end of hole 96a will limit the movement downwards of limiting member 96.Here, the Right deviation in turning-bar 11 is dynamic When angle RT is located at the range before T2, side brake 7R is not yet turned on, but with the arm of upside at this time 93 upwards Rotation, still sufficiently, ensuring that allows pedal 13 for the distance between upper end of the banking pin 93a and long hole 96a that are moved upward Drop to the slippage of the limiting member 96 for the amount for trampling position D.

But when the right turning angle RT of turning-bar 11 is more than T2 and reaches the state of side brake 7R unlatching, at this time Relative position of the banking pin 93a in long hole 96a get higher, the distance between banking pin 93a and the upper end of long hole 96a shorten, The distance is insufficient for making pedal 13 drop to the slippage for trampling the limiting member 96 of position D.That is being stepped on when trampling When plate 13, limiting member 96 declines, but its decline is hindered by banking pin 93a, so that pedal 13 can not be made, which to drop to, tramples position D, thus, it is suppressed that side brake 7R work in the state of trampling the assisted clutch 8 that carries out by pedal 13 Engage the increase of pressure.

On the other hand, as shown in figure 25, by pedal 13 be set to it is non-trample position and by turning-bar 11 be set to in-line position, this When long hole 96a in banking pin 93a and the distance between the upper end of long hole 96a ensure that dropping to pedal 13 only tramples position It sets the slippage of the limiting member 96 of D, therefore, it can be achieved that is carried out as thinking operator by trampling for pedal 13 The increase of the engagement pressure of assisted clutch 8.

Here, pedal 13 is trampled to when trampling position D simultaneously when turning-bar 11 is maintained at in-line position, such as Figure 27 institute Show, the position of banking pin 93a remains stationary, and interior lines 101 are pulled downwardly, and limiting member 96 declines, and spring 97 extends.Therefore, long The relative position of banking pin 93a in the 96a of hole is moved upward, the contracting of the distance between upper end of banking pin 93a and long hole 96a It is short.By pedal 13 be set to trample position D when banking pin 93a set at a distance from the upper end of long hole 96a are as follows: with upside The rotation upwards of arm 93 and the amount of movement upwards of banking pin 93a generated compares, ensure that until turning-bar 11 Right turning angle T is more than the amount of movement upwards of the banking pin 93a of T1 (that is, in the state for disconnecting side clutch 6R), but right It is insufficient for the amount of movement upwards for the banking pin 93a that the right turning angle T up to turning-bar 11 reaches T2.

Therefore, since making pedal 13 drop to the state for trampling position D, upper side arm 93 turns to turning-bar upwards When 11 Right deviation chamfer angle RT reaches T2, as shown in figure 28, banking pin 93a is crimped on the upper end of long hole 96a, and becoming can not be into one Step rotates the state of upper side arm 93 upwards.In this way, to until the Right deviation chamfer angle T of turning-bar 11 reaches the turning-bar of T2 or more 11 fascinate is limited, to trample by pedal 13 to during trampling position D, the side brake 7R of turning medial will not Starting.

It should be noted that, although not turning lower side arm 94 downwards to turning-bar 11 fascinates to the left from in-line position Dynamic situation is illustrated, but can be illustrated referring to Figure 25 to Figure 28 to the situation.Instantly side arm 94 is with turning-bar 11 To the left when fascinating and rotating downwards, by the interior lines 101 of link mechanism 100 and outside line 102 together in integrated downwards It pushes.Limiting member 96 moves downwards as a result, and spring 97 extends the movement to allow the limiting member 96.At this point, upper side arm 93 are maintained at position when turning-bar 11 to be set to in-line position, and therefore, banking pin 93a is motionless.So banking pin 93a with The distance between upper end of long hole 96a or can rotating down and shorten with lower side arm 94.

As described above, in turning-bar 11 in the case where fascinating to the left, lower side arm 94 is rotated in link mechanism 100, by This, outside line 102 is moved together with interior lines 101, and on the other hand, in pedal 13 in the case where trampling, outside line 102 is remained stationary, Only interior lines 101 are pulled by the arm 13b of pedal 13.Foregoing turning-bar 11 is being rotated to the left and left turning angle LT is arrived In the case where T2, banking pin 93a is at a distance from the upper end of long hole 96a for trampling position D's by dropping to pedal 13 only The movement of interior lines 101 and it is insufficient for the slippage of limiting member 96 that generates, therefore, it is impossible to which dropping to pedal 13 tramples position Set D.In this way, inhibiting auxiliary when pushes pedals 13 when fascinating and side brake 7L being made to work turning-bar 11 to the left The increase of the engagement pressure of clutch 8.

On the other hand, when dropping to pedal 13 to trample position D when turning-bar 11 is set to in-line position, become figure State shown in 27, the distance between banking pin 93a and the upper end of long hole 96a shorten, and the distance is for until turning-bar For 11 left-leaning chamfer angle LT reaches the rotation downwards of the lower side arm 94 of T2 and the slippage of limiting member 96 that generates Deficiency, therefore, it is impossible to which the left-leaning chamfer angle LT of turning-bar 11 is made to reach T2.In this way, made by pushes pedals 13 auxiliary from When increase is pressed in the engagement of clutch 8, even if turning-bar 11 is fascinated to the left, side brake 7L does not work yet.

Then, as can adjust automatically assisted clutch 8 engagement pressure speed changer 1 embodiment, to Figure 29 to Figure 32 Shown in speed changer 1B shown in speed changer 1A and Figure 33 and Figure 34 be illustrated.It should be noted that Fig. 3 is also by as table Show the in-built figure of speed changer 1A or 1B for being illustrated to these embodiments.In addition, by with before this illustrated Component that the identical appended drawing reference of appended drawing reference used in embodiment is indicated or part be set as having with it is above-mentioned The identical component of the component or part or part or identical function in embodiment, and the description thereof will be omitted.

Here, in advance to as can adjust automatically assisted clutch 8 engagement pressure technical background be illustrated.Such as such as Shown in Fig. 1, the adjustment of the tread-on quantity of pedal 13 can be adjusted manually come the engagement pressure to assisted clutch 8 by operator It is whole.But the difference of the various conditions such as state relative to soil, only pass through the judgement of operator, it is difficult to select always optimal Assisted clutch 8 engagement pressure, turning under the turning radius as target may be unable to get because selecting fault. Therefore, such as embodiment below, the difference etc. of the state regardless of soil can all be accurately obtained through steering operating parts Turning under the desired turning radius that the operation of (turning-bar 11) is assumed, in addition, without the need for such turn can be carried out The time of curved operator.

Firstly, the steering for moving left device 5L control is set as turning to driving with driver about speed changer 1A, 1B The steering for moving right device 5R control is set as steering driver SAR with driver, and they is referred to as turning by device SAL To with driver SA.In addition, speed changer 1A, 1B have assisted clutch driver AA as to assisted clutch 8 The driver that the position of mobile device 9 carries out automatically controlling uses the driver (electric drive shown in Figure 32 with motor Device) 141 as assisted clutch driver AA.

Then, in speed changer 1A, have with hydraulic circuit identical with steering driver group 2 above-mentioned construction Driver control system, by the steering comprising hydraulic cylinder driver 34L, 34R (be referred to as " steering use driver 34 ") as It turns to and uses driver SAL, SAR.It should be noted that being referred to as used as steering driver SA in speed changer 1A The hydraulic cylinder 34 (34L, 34R) of (SAL, SAR).

On the other hand, in speed changer 1B, have with by as assisted clutch with driver AA come using electronic drive The identical driver of device 141 is moved as steering driver SAL, SAR, and by the electricity as steering with driver SAL, SAR Dynamic driver 141 is known as steering motor driver 141L, 141R.

By Fig. 3, Figure 29 to Figure 32 etc., speed changer 1A is illustrated.Such as also chatted in the explanation of speed changer 1 above-mentioned As stating, at the rear portion of gearbox 20, there is the rotation axis being extended in front-rear direction in inside and outside perforation shape pivot suspension 17.In the outer end of the rotation axis 17 in the outside (rear) of gearbox 20, equipped with the auxiliary as assisted clutch with driver AA Clutch motor driver 141.

As shown in figure 29, based on the command signal from controller 10 to hydraulic with driver SAL, SAR as steering It cylinder 34L, 34R and is controlled as assisted clutch with the motor driver 141 of driver AA.Here, about each steering With driver SA, will be arranged to that corresponding mobile device 5 is set to the maximum sliding position of inside and attempts to make side clutch 6 The state of engagement is set as the off working state of steering driver SA, will be arranged to keep mobile device 5 sliding from the maximum of inside The dynamic outside Slideslip in position is even the state of a little is set as the working condition of steering driver SA.On the other hand, about Assisted clutch driver AA will be arranged to that mobile device 9 is set to the maximum sliding position of clutch separation side and is tried The state that figure keeps assisted clutch 8 isolated is set as the off working state of assisted clutch driver AA, and will be arranged to make Mobile device 9 engages Slideslip even the state of a little is set as from the maximum sliding position of clutch separation side to clutch The working condition of assisted clutch driver AA.

In addition, in the car, as Servo Control with and assisted clutch control operating parts, be equipped with turning-bar 11, assisted clutch automatic control switch 112 (hereinafter, being only set as " switch 112 ") and the setting of assisted clutch engaging force are carved Scale 113 (hereinafter, being only set as " dial 113 "), and in order to detect the operating position of turning-bar 11, have set on the turning-bar Potentiometer 11p, switch 112 and the dial 113 of 11 base portion are as the input unit relative to controller 10.That is, logical It crosses and is respectively arranged on the detection unit of potentiometer 11p, switch 112 and dial 113 to detect the operating position of each operating parts, and Detection signal 11s, 112s, the 113s for indicating these operating positions are inputted to controller 10.

Moreover, speed probe 114L, 114R for detecting respective revolving speed is equipped in left and right axle 4L, 4R, each turn Detection signal 114Ls, 114Rs of fast sensor 114L, 114R are input to controller 10.It is defeated according to institute in controller 10 Detection signal 11s, 112s, 113s, 114Ls, the 114Rs entered is determined to hydraulic cylinder 34L, 34R and assisted clutch electricity consumption The command content of dynamic driver 141, and issue the command signal determined based on this.

With by turning-bar 11 from in-line position fascinate to the left and make its dump angle T increase, potentiometer 11p output with The signal 11s of the corresponding value of the dump angle and direction, signal 11s are input to controller 10.Controller 10 with this The corresponding mode of signal 11s sends command signal 32Ls to make solenoid 32a excitation, by directional control valve to directional control valve 32 32 are set to the position " L ", extend the piston rod of steering driver 34L, on the other hand, send command signal to overflow valve 33 33s determines the overflow pressure of the overflow valve 33 for limiting the piston rod elongation sliding position of mobile device 5L (that is, limit). On the other hand, increase its dump angle T with turning-bar 11 fascinates to the right from in-line position, potentiometer 11p is sent out Signal 11s out is input to controller 10, and controller 10 is sent in a manner of corresponding with signal 11s to directional control valve 32 Command signal 32Rs makes solenoid 32a excitation, and directional control valve 32 is set to " R " position, makes the work of steering driver 34R On the other hand stopper rod elongation sends command signal 33s to overflow valve 33 to determine for limiting piston rod elongation (that is, limiting The sliding position of mobile device 5R) overflow valve 33 overflow pressure.

It should be noted that threshold switch 53 shown in Fig. 1, Figure 10, Figure 16 etc. can be set as controlling to direction Valve 32 processed sends the input unit relative to controller 10 of command signal 32Ls or 32Rs.

Switch 112 is for deciding whether cutting for the automatic control of progress assisted clutch 8 (whether using and manually control) Operating unit is changed, can be switched to the position " ON " for carrying out the automatic control and (is set by manually without the automatic control The engaging force F of assisted clutch 8) the two positions of the position " OFF ".

Dial 113 be in the case where manually setting the engaging force of assisted clutch 8 will switch 112 be set as The setting unit of the engaging force in the case where the position " OFF ".Dial 113 can be set from by the engaging force F of assisted clutch 8 " 0 " position of (i.e. disconnection assisted clutch 8) turns to position " Fmax " that engaging force F is set as to maximum value Fmax for 0, according to Its turned position sets the engaging force F of assisted clutch 8.The position of dial 113 is closer to the position " Fmax ", then set Engaging force F it is bigger.It should be noted that both can be in advance in " 0 " position to some settings determining between the position " Fmax " Position, and engaging force F, Huo Zheye are hierarchically set by the way that dial 113 is set to any of these setting positions Can be can infinitely change engaging force F, and according to the dial 113 that can infinitely rotate from " 0 " position to the position " Fmax " Arbitrary turned position set engaging force F.

It should be noted that the setting position as the switch 112 and the dial 113, such as in the car, It is contemplated that the instrument board of the speed for the display vehicle being arranged on the partition in the front of turning-bar 11, engine speed On.It is further contemplated that the reality of the engaging force F of the expression assisted clutch 8 in the setting of such instrument board as shown in Figure 41 It is worth the assisted clutch engaging force table 117 of (current value).Operator can be true come vision by assisted clutch engaging force table 117 Recognize the current value of the engaging force F of the assisted clutch 8 of moment variation under automatic control.It should be noted that in the present embodiment Using liquid crystal display as assisted clutch engaging force table 117 but it is also possible to be the display unit of any construction.This Outside, it in the present embodiment premised on maximum engaging force Fmax is set as the engaging force F of " 100% ", and is indicated by bar chart The actual value of engaging force F is the percent how many of maximum engaging force Fmax, but as long as being that operator can identify current auxiliary The display methods of the engaging force F of clutch 8, then what kind of display methods is ok.

In addition, as move left and right the positioning operating unit of device 5L, 5R, the engaging force of assisted clutch 8 it is automatic The setting of the engaging force of the switching operating unit that controls/manually control and the assisted clutch 8 when manually controlling setting is used Operating unit is not limited to form as above-described turning-bar 11, switch 112, dial 113, as long as being able to Ensure the construction of required function.For example, switch 112 can be replaced with bar 12 as shown in Figure 1 and will carved Scale 113 replaces with pedal 13.

Alternatively, as shown in Figure 42, Figure 43, it is also contemplated that by connecing as the assisted clutch 8 when manually controlling setting The upper end of the preposition grip part 11b in turning-bar 11 of the dial 113A of the setting operating unit of resultant force.In the present embodiment In, dial 113A includes: being fixed on the fixed part 113a of the grip part 11b of turning-bar 11 and around being set to the fixed part 113a and the rotation section 113b being freely rotated centered on the axle center of the turning-bar 11 to the direction R, in rotation section, 113b is formed with Knob 113c, so that operator can carry out rotation operation by the twisting of the thumb of hand.It is printed in fixed part 113a Indicate the scale of the series (be in the present embodiment 0,1,2,3,4) of the engaging force F of assisted clutch 8, operator is via knob Portion 113c rotates rotation section 13b to the direction R, makes either one or two of scale of the mark for being printed in rotation section 113b and fixed part weight It closes, to arbitrarily set the series of the engaging force F of assisted clutch 8.

As assisted clutch driver AA, be secured to as shown in Figure 31 and Figure 32 gearbox 20 outside (after Side) motor driver 141 have can positive and negative rotation motor 142 as its driving source, the output shaft of the motor 142 For worm screw 144.It is connected with gear-box 144 in motor 142, is pivotally supported the outer of rotation axis 17 above-mentioned in gear-box 143 End, and support the pair that setting is extended parallel to relative to the rectangular direction of worm screw 144 and relative to the rotation axis 17 Axis 145.It is fixedly installed worm gear 146 and pinion gear 147 in countershaft 145, worm gear 146 is engaged with worm screw 144.In rotation axis 17 Outer end be fixedly installed sector gear 148, engaged with pinion gear 147.

Controller 10 based on from it is above-mentioned as the turning-bar 11 of input unit, switch 112, dial 113, revolving speed pass Input signal 11s, 112s, 113s, 114Ls, 114Rs of sensor 114L, 114R come determine motor 142 rotation direction and Amount of spin, and command signal 142s is issued to motor 142 as needed.The rotation of motor 142 is via worm screw 144, worm gear 146, countershaft 145, pinion gear 146, sector gear 148 are transferred to rotation axis 17, are generated according to the rotation based on rotation axis 17 The dump angle of cam surface 17a as described above determine the sliding position of the mobile device 9 of 8 control of assisted clutch.

Command signal 142s is set to the voltage for the turned position for for example making motor 142 turn to target, the voltage The shift fork axle 9a and shift fork 9b for assigning the applied force for overcoming the spring 9e of mobile device 9 to rotation axis 17 and making mobile device 9 Slide into the torque of the sliding position of target.If the voltage becomes 0, the shift fork axle 9a of mobile device 9 passes through spring 9e's Applied force and the maximum sliding position for being configured at the clutch separation side.In this way, being driven about as assisted clutch The motor driver 141 of device AA, by motor 142 be set as non-driven state so as to the shift fork axle 9a of mobile device 9 be configured at from The state of the maximum sliding position of clutch separation side is corresponding with its off working state, and drive motor 142 is to become making moving The shift fork axle 9a of device 9 engages Slideslip even the shape of a little from the maximum sliding position of clutch separation side to clutch The state of state is corresponding with its working condition.

Then, by Fig. 3, Figure 33 and Figure 34 etc., speed changer 1B is illustrated.The present embodiment uses motor driver On the other hand 141 are made as assisted clutch driver AA using driver identical with the motor driver 141 For steering driver SAL, SAR.

Controller 10 based on from turning-bar 11 base portion above-mentioned as input unit potentiometer 11p, switch 112, Dial 113, speed probe 114L, 14R input signal 111s, 112s, 113s, 114Ls, 114Rs decide to move to use The rotation direction and amount of spin of the motor 142 of motor driver 141L, 141R, and as needed to respective motor 142 issue command signal 142Ls, 142Rs.The rotation of the steering respective motor 142 of motor driver 141L, 141R via Worm screw 144, worm gear 146, countershaft 145, pinion gear 146, sector gear 148 are transferred to rotation axis 30, to determine to be based on rotation axis 30 rotation and the sliding position of mobile device 5 generated.

Command signal 142Ls, 142Rs is set to the turned position for for example making respective motor 142 turn to target Voltage, the voltage to rotation axis 30 assign overcomes the respective spring 5a of mobile device 5L, 5R applied force and make the movement fill Set the torque for the sliding position that 5 slide into target.If the voltage becomes 0, the applied force that mobile device 5 passes through spring 5a It is configured at the maximum sliding position of the inside.

In this way, in speed changer 1B, will move left and right the steering of device 5L, 5R control with driver SAL, SAR and Assisted clutch is all set to motor driver 141 with driver AA, as a result, compared with steering control system 1A, without constituting Therefore hydraulic pump 31, directional control valve 32 and variable overflow valve 33 for controlling the hydraulic circuit of steering driver have Conducive to the densification of driver group 2.

The control flow implemented is shown in Figure 35 through the controller 10 in speed changer 1A, 1B formed as described above Figure, is described.Firstly, controller 10 reads the input signal 112s from switch 112, assisted clutch 8 is judged It controls whether to be set as automatic mode (whether switch 112 is set in the position " ON ") (step S01).It is being not set to automatic mode Under the case where (switch 112 is set in the position " OFF ") (being no in step S01), the input signal from dial 113 is read 113s controls assisted clutch with actuator electronic control AA, so that the engaging force F of assisted clutch 114 is and quarter The corresponding setting value Fs in the setting position of scale 113.For example, in the case where dial 13 is set to described " 0 " position, if Definite value Fs is 0, in this case, assisted clutch is set as off working state with actuator electronic control AA, by mobile device 9 Shift fork axle 9a is configured at the maximum sliding position of clutch separation side, disconnects (the dial shown in referring to Fig.1 of assisted clutch 8 13 and mobile device 9).Setting value Fs's and engaging force F in the case that dial 113 is set to described position " Fmax " Maximum value Fmax is corresponding.In this case, assisted clutch is set as working condition with actuator electronic control AA, by mobile device 9 shift fork axle 9a is configured at the maximum sliding position of clutch engagement side, and the engaging force F of assisted clutch 9 is set as maximum (ginseng According to mobile device 9 shown in Fig. 10).

(in step the case where the control of assisted clutch 8 is set as automatic mode (switch 12 is set in the position " ON ") It is yes in S01) under, assisted clutch is set as working condition with actuator electronic control AA, by the engaging force of assisted clutch 8 F is set as being set to the specified value Fv (value greater than 0) (step S03) for automatic mode.Then, in order to detect turning-bar 11 Dump angle T and the input signal 11s of reading potential device 11p.It is 0 i.e. in turning-bar 11 positioned at straight trip position in dump angle T When setting (being yes in step S04), two steerings are set as off working state (step with actuator electronic control SAL, SAR S05).The maximum sliding position that two mobile devices 5L, 5R in left and right are configured in respective inside as a result, (moves left device 5L To slide right end position, device 5R is moved right as sliding left position), two side clutch 6L, 6R engagements.

It should be noted that in this way, judging to make vehicle straight trip based on the detection of the dump angle T of turning-bar 11 still In stage before turning, the engaging force F of assisted clutch 8 is then set as specified value Fv if it is automatic mode setting, as a result, In straight trip driving process, even the axle 4 of a side becomes situation as slipping state, the axle 4 of another party is assigned The a part for the driving force given can also be transferred to the axle 4 of a side via assisted clutch 8, without will become such skidding State, or can be easy to get rid of becoming slipping state.

When turning-bar 11 is rotated (being no in step S04) from in-line position, the steering electronics control in outside of turning Driver SA processed keeps off working state, and the steering of turning medial is made to be worked (step S07, with actuator electronic control SA S13).The workload with actuator electronic control SA is decided to move to according to the dump angle T of turning-bar 11 (if it is hydraulic cylinder 34, then it is the elongation of piston rod；If it is the driver 141 with motor, then the voltage of motor 142 is applied to), The mobile device 5 of turning medial is configured at sliding position corresponding with the workload.It is less than maximum of T max in its dump angle T The case where (being yes in step S06) under, the rotation speed of the axle 4 about turning medial or 4 phase of axle of turning medial For the rotation speed ratio of the axle 4 in turning outside, by target value St corresponding with the dump angle T of turning-bar 11 and according to next It is compared from the calculated measured value Sa of input signal 114Ls, 114Rs institute of speed probe 114L, 114R, in measured value It in the case where there is difference between Sa and target value St, carries out control as follows: being adjusted by adjusting the engaging force F of assisted clutch 8 The whole driving in left and right is the amount of torque transmitted between 3L, 3R, reduces or eliminates the difference.

That is, (allowing model comprising difference there is no poor between measured value Sa and target value St during the turning of vehicle Enclose interior situation) the case where (be yes in step S08) under, vehicle can be turned with the turning radius of target, therefore, be assisted Clutch actuator electronic control AA keeps current working status, and the engaging force F of assisted clutch 8 remains current value (step Rapid S09).

Measured value Sa during the turn was greater than under the case where target value St (being in step slo yes), turning medial Axle 4 rotation speed (rotation speed ratio) it is excessively high and can be turned with the big turning radius of the turning radius than target, Therefore, the workload of assisted clutch actuator electronic control AA is reduced, that is, reduce to be used as being applied to as assisted clutch With the voltage of the command signal 142s of the motor 142 of the driver 141 of actuator electronic control AA, make dialling for mobile device 9 Fork shaft 9a reduces the engaging force F (step S11) of assisted clutch 8 to clutch separation Slideslip, reduces the drive from turning outside Dynamic is the transmitting torque that 3 driving to turning medial is 3.Rotation speed (the rotation speed of the axle 4 of turning medial is reduced as a result, Spend ratio), turning radius is reduced to approach the turning radius of target.

On the other hand, for the purpose of measured value Sa in the situation (being in step slo no) of value St or less, turning medial The rotation speed (rotation speed ratio) of axle 4 is too low and can be turned with the big turning radius of the turning radius than target, because This, increases the workload of assisted clutch actuator electronic control AA, that is, increases to be used as to be applied to and use as assisted clutch The voltage of the command signal 142s of the motor 142 of the driver 141 of actuator electronic control AA, makes the shift fork of mobile device 9 Axis 9a engages Slideslip to clutch, increases the engaging force F (step S12) of assisted clutch 8, increases the driving from turning outside It is the transmitting torque that 3 driving to turning medial is 3.Increase the rotation speed (rotation speed of the axle 4 of turning medial as a result, Than), increase turning radius to approach the turning radius of target.

In the case where the dump angle T of turning-bar 11 is maximum of T max (being no in step S06), by turning medial Steering be set as maximum with the workload of actuator electronic control SA, the side brake 7 of turning medial is set as the shape fully opened State (being that 3 and the brake force of axle 4 are set as maximum by the driving for being applied to turning medial).Meanwhile by assisted clutch electricity consumption Son control driver AA is set as off working state, disconnects assisted clutch 8 as a result, prevents the axle 4 for being applied to turning medial The driving that the brake force of the side brake 7 of turning medial is transferred to turning outside is 3 and axle 4, also, improves auxiliary clutch The durability of device 8.

Then, by Figure 36 to Figure 38, the side clutch that uses in speed changer 1A, 1B, side brake system are carried out Parking brake operation be illustrated.In the past, equipped with applying side clutch, side brake formula steering control system In the vehicle of speed changer, apply following method: vehicle setting be configured to open simultaneously two side brakes in left and right or with Left and right side brake independently assigns brake force to two axles.But the method for opening two side brakes in left and right at the same time In, before in left and right, two side brakes are opened, it may appear that the two side clutches in left and right simultaneously switch off that (axle of two sides becomes non- Driving condition) state, sloping floor open parking brake when, brake beginning delay can become vehicle attitude deflection The main reason for equal.On the other hand, separately setting parking brake in terms of cost, it is unfavorable in terms of the densification of speed changer.

Here, constituting are as follows: the engaging force F of assisted clutch 8 is set as maximum value Fmax, enters two driving systems as a result, 3L, 3R and two axles 4L, 4R are completely by the state of differential locking, when controlling driving is that the side in 3L, 3R is braked, Its brake force is transferred to another party via assisted clutch 8, and two axles 4L, 4R are braked simultaneously, sends out as parking brake Wave function.

That is, having parking brake shown in Figure 36 in the vehicle of speed changer 1A or 1B equipped with the present embodiment and stepping on Plate 115 switches parking brake switch 115a's by the presence or absence of its stampede operation as parking brake operating parts ON,OFF.Then, the input of controller 10 into steering control system 1 indicates the letter of ON, OFF of parking brake switch 115a Number 115s.

In this way, program shown in Figure 38 is embedded in the control flow of the controller 10 of vehicle turning shown in Figure 35, with Just steering control system 1 is functioned as parking brake.That is, when detecting that parking brake switch 115a is in ON When (step S21, ON), controller 10 is by a pair of of steering with the side in actuator electronic control SAL, SAR (in the implementation of Figure 37 Off working state is remained with actuator electronic control SAR) for steering in example and is maintained at its foregoing mobile device 5 Another party's (turn to electricity consumption in the embodiment of Figure 37 and control driver SAL) is set as complete by the maximum sliding position of inside (full) working condition and by its mobile device 5 be configured at outside maximum sliding position.Then, make assisted clutch electronics Driver AA work is controlled, so that the engaging force F of assisted clutch 8 is maximum value Fmax (step S22).When becoming stopping brake When idle (parking brake switch 115a the be OFF) state of device 115, the switch in the control flow of Figure 35 is migrated to The detecting step (step S01) of 112 ON, OFF.

Then, embodiment shown in Figure 39 and Figure 40 is illustrated.In the present embodiment, before carrying out based on vehicle The Corrective control of the engaging force of the assisted clutch 8 of the detection of the heeling condition of rear direction.Firstly, being illustrated to its purpose. In the case where sloping floor is turned, especially in the case where crossing sloping floor, the self weight of vehicle, which is pressed in be located at, inclines The tiltedly axle 4 of the downside in face, in particular, turning path is very for the axle 4 for the turning medial that opposite side clutch 6 disconnects May than imagination track more to the downside deflection of sloping floor.That is, when being turned in the sloping floor that the front is high and the back is low, The axle 4 of turning medial usually can be to the rear deflection as lower position side, on the other hand, when in low early and high after sloping floor When being turned, the axle 4 of turning medial usually can be to the front deflection as lower position side.It is contemplated that by improving turning The cross-country ability to direction of travel of the axle 4 of inside deviates to eliminate this caused by being self-possessed, in order to improve cross-country ability, Ke Yikao Worry increase is via the torque that driving of the assisted clutch 8 on the outside of turning is that 3 driving to turning medial is 3.Therefore, in this reality It applies in the steering control system 1 of example, when the setting of the engaging force F of assisted clutch 8 is set as automatic mode, when vehicle becomes When heeling condition, in order to correct the engaging force of assisted clutch 8, the control of assisted clutch actuator electronic control AA will do it System.

That is, in the present embodiment, as shown in figure 39, as the input unit relative to controller 10, being equipped with inspection in vehicle The inclination sensor 116 of tilt angle in the front-back direction (pitch angle) P of measuring car, and from inclination sensor 116 to controller The detection signal 116s of 10 input tilt angle P.Then, as shown in figure 40, in assisted clutch actuator electronic control AA Engaging force F based on automatic mode ON (being yes in step S01) work and assisted clutch 8 is arranged to the shape of specified value Fv Under state (step S03), controller 10 reads inputted detection signal 116s, judges whether the tilt angle P of vehicle is 0 (packet Containing close to 0 without correct engaging force F allowed band in value the case where) (step S31).

If it is determined that vehicle is in horizontality (tilt angle P is 0) (being yes in step S31), then keep setting At the engagement state for the assisted clutch 8 that engaging force F is specified value Fv, migrate to for the straight trip of vehicle or turning for Servo Control To the reading stroke (step S04) of the dump angle T of bar 11.If it is determined that vehicle is not that (tilt angle P is not horizontality 0) (being no in step S31), then controller 10 issues command signal 142s, to improve to as assisted clutch electronics The application voltage for controlling the motor 142 of the driver 141 of driver AA slides mobile device 9, by assisted clutch 8 Engaging force F increases to value (step S32) corresponding with its tilt angle P.In this way, when make to be initially set to the auxiliary of specified value Fv from When the engaging force F of clutch 8 increases to value corresponding with tilt angle P, migrate to for the straight trip of vehicle or turning for Servo Control To the reading stroke (step S04) of the dump angle T of bar 11.

In the driving process of the vehicle under the automatic mode, the detection signal 116s from inclination sensor 116 is held Continuous to be input to controller 10, in order to adjust the engaging force F of assisted clutch 8, controller 10 is right according to the variation of tilt angle P Assisted clutch is persistently controlled with actuator electronic control AA.On the other hand, in the case where switch 112 is set as OFF (being OFF in step S01), the engaging force F of the variation of the heeling condition regardless of vehicle, assisted clutch 8 is fixed on Setting value Fs (step S02) in dial 113.

Industrial availability

As mentioned above, wheel steering system of the invention is applied to turn using side clutch, side brake formula To the transmission for vehicle etc. of system, as the typical vehicle for constituting application, there is agriculture combine harvester, but can be with Vehicle applied to all kinds using side clutch, side brake formula wheel steering system.

Description of symbols:

1 speed changer

2 Vehicular turns driver group

3 (3L, 3R) driving system

4 (4L, 4R) axles

5 (5L, 5R) mobile devices

6 side (6L, 6R) clutches

7 (7L, 7R) side brakes

8 assisted clutch

9 mobile devices

10 controllers

11 turning-bars (steering operation part)

12 bars (assisted clutch engaging force setup unit)

13 pedals (assisted clutch operating parts)

18 (18A, 18B) restrain mechanism

Claims (5)

1. a kind of wheel steering system is constituted are as follows: for a pair of and column-shaped driving system to a pair of of axle distribution power Each is arranged side clutch and side brake and disconnects the side clutch of turning medial with the operation of steering operation part, and Side brake is set to work, which is characterized in that

It is provided with assisted clutch, for transmitting torque between a pair of driving system, and engaging force is set as variable；And Assisted clutch operating parts for increasing the engaging force of the assisted clutch, and is additionally provided with: mechanism is restrained, for making side The work of brake and the engaging force increase of assisted clutch will not carry out simultaneously.

2. wheel steering system according to claim 1, which is characterized in that

The containing mechanism is constituted are as follows: is operating as increasing the engagement of the assisted clutch in the assisted clutch operating parts When power, the operation regardless of the steering operation part, the side brake of turning medial does not work.

3. wheel steering system according to claim 2, which is characterized in that

It is provided with assisted clutch engaging force setup unit, for the engaging force of the assisted clutch to be set as specified value, The assisted clutch operating parts is operated and is used to make the engaging force of the assisted clutch to engage from by the assisted clutch The specified value set by power setup unit starts to increase.

4. wheel steering system according to claim 1, which is characterized in that

The containing mechanism is constituted are as follows: when the steering operation part is operating as that the side brake of turning medial is made to work, nothing By the assisted clutch operating parts operation how, the engaging force of the assisted clutch not will increase.

5. wheel steering system according to claim 4, which is characterized in that

It is provided with assisted clutch engaging force setup unit, for the engaging force of the assisted clutch to be set as specified value, The assisted clutch operating parts is operated and is used to make the engaging force of the assisted clutch to engage from by the assisted clutch The specified value set by power setup unit starts to increase.