JPS59124417A - Power unit supporting, drive wheel driving and suspending devices for car - Google Patents

Abstract

PURPOSE:To simplify and miniaturize the construction of the captioned device of a car equipped with a pair of right-and-left driving wheels by forming a power unit casing with a rigid body to support the driving wheel and by connecting the casing to a car body via a pivot so that it can freely be rocked. CONSTITUTION:A power unit P is formed with an engine E and a pair of right- and-left belt-type automatic speed changers M and M', and it is placed in a casing 70. Transmission cases 71 and 71' of the automatic speed changers M and M' are installed in extension on both sides of the front end of a car body frame F, while driving wheels Wf and W'f are fitted on a projecting car shaft 67. Semicircular supporting brackets 74 to 77 are arranged between the transmission cases 71 and 71' of the casing 70, and a pivot 83 is pivotally supported by semicircular supporting caps 79 to 82. At the positions of the supporting brackets 74 and 77, the pivot 83 is rockably supported by supporting plates 1a and 1a' of the car body frame F via a pair of right-and-left suspension spring devices Sf and Sf'. With this contrivance, the construction can be simplified and miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power unit support, drive wheel drive, and suspension system in a vehicle equipped with a pair of left and right drive wheels.

Conventionally, in a vehicle having a pair of left and right drive wheels, such as a four-wheel vehicle, the support device for the arm arm unit, the drive device for the drive wheels, and the suspension device are each independent. It would be extremely beneficial to simplify and downsize the structure of the entire device if these could be shared and configured integrally.

The present invention is based on such an idea, and comprises a power unit including a pair of transmission devices that individually transmit the power to the two assembled wheels, and forms the power unit into a rigid rigid body. Support brackets are provided in a protruding manner, and the two assembly wheels are provided between the semicircular support surfaces of these support brackets and the semicircular support surfaces of a plurality of support chatos connected to these support brackets via through bolts. A pivot shaft is disposed in the arrangement direction of the through gel and is inserted between the pivot shafts, and the coushing is attached to the vehicle body frame as a swinging mark via the pivot shaft so as to allow vertical movement of both driving wheels. A suspension spring device is interposed between the connecting pivot shaft and the vehicle body frame.

An embodiment of the present invention will now be described with reference to the drawings.

First, in FIGS. 1 to 3, the illustrated vehicle has a pair of left and right drive wheels Wf, Wf' at the front of a vehicle body frame F, and a steering wheel unit P for driving these wheels. Driven wheels Wr are respectively arranged i.

The vehicle body frame F has front end support plates ia and 1a.
A pair of left and right vertical members 1 and 1' with vertical members 1 and 1' standing upright, a plurality of horizontal members 213.4.5 that connect them in a ladder shape, and two horizontal members 3 and 4 in the middle of the structure are connected. A pair of reinforcing materials 6,
6' and the front parts of these so as to connect the longitudinal members 1, 1',
It consists of three inverted U-shaped roll pars 7.8.9 connected to the center and rear parts, and surrounds the front roll par 7, the frontmost cross member 2, and the left and right support plates 1a and la'. The central roll par 8 and the rear roll par 9 are connected via a reinforcing member 11 at their tops. Steering handle 1 in the center of the front roll par 7
A steering column supporting 3 is attached.

The pair of reinforcements 6,
A fuel tank 12 is disposed between the fuel tank 1 and the fuel tank 6'.
2 is gelted to the cross member 3 and both sleeve reinforcement members 6, 6'.

A floor plate 16 is attached to the lower surface of the vehicle body frame F, and a front seat 14 for the driver and a passenger A are attached to the upper surface of the floor plate 16.
A rear seat 15 is installed for the vehicle, and the pack rests 14a, 15a are arranged approximately on the center roll par 8 and the rear roll par 9, respectively. Of course, the heights of these rolls 8.9 are selected in advance so that they pass over the heads of the driver and passenger A, respectively.

In Figures 4 to 6, the power unit P includes an engine E, a pair of left and right belt automatic transmissions M and M' disposed on both sides of the rear part of the engine E, and a pair of left and right belt type automatic transmissions M and M'.
is equipped with a reduction gear mechanism R on the output side. The automatic transmissions M and M' constitute the transmission device of the present invention.

The engine E has its crankshaft 2o in the left and right direction of the vehicle.
That is, both drive wheels Wf and Wf' are arranged in the direction in which they are arranged, and the output shaft 2 is located on the m- side of the crankshaft 20.
1, and on the other side, a primary inertia force balancing shaft 22, a pump drive shaft 23, and a starting motor 24 are connected to the crankshaft 2, respectively.
It is arranged parallel to 0. A generator 2b is attached to one end of the crankshaft 20, and a centrifugal automatic starting clutch 26 is attached to the other end of the crankshaft 20.
A forward/reverse switching device 21 is provided between the clutch 26 and the output shaft 21.

This device 27 includes a drive gear 28 fixed to the power member of the clutch 26, a relay gear 29 rotatably supported by the output shaft 21 and constantly engaged with the drive gear 28, and a crankshaft 20.
A small-diameter idle gear 31 rotatably supported on an idle shaft 30 parallel to the same and always meshing with the drive gear 28, a large-diameter idle gear 32 integrally connected to the small-diameter idle gear 31, and a relay gear 29 and a large-diameter The idle gear 32 is composed of a switching gear 33 that is slidably fitted to the output shaft 21 adjacent to the idle gear 32. The switching gear 33 is
It resides on the output shaft 21 and can move between the forward position on the right and the reverse position on the left in FIG. A dog clutch consisting of a dog 34 and a dog hole 35 that can engage with each other is provided on the switching gear 33 and the relay gear 29, and in the reverse position, the dog clutch 3
1 so that 4.35 is released and the switching gear 33 meshes with the large diameter idle gear 32.

When the switching gear 33 is placed in the forward position, the rotational torque of the crankshaft 20 is transferred to the starting clutch 261 and the drive gear 28.
, relay gear 29 and switching gear 33 to the output shaft 21, which can be rotated in the normal direction. Furthermore, if the switching gear 33 is shifted to the reverse position, the rotational torque is transferred to the starting clutch 26, drive gear 28, Hikiho\\Sagi\small diameter idle gear 31, large diameter idle gear 32, and switching gear aa4g: sequentially to the output shaft. 21 and can be reversed.

An annular engagement groove 36 is provided on the outer periphery of the boss portion of the switching gear 33, and a shift fork 38 that is slidably supported on a guide shaft 37 parallel to the crankshaft 20 is provided in this groove 36.
Further, the projection 38m of the rear wheel of the shift fork 38 is engaged with the cam groove 39a of the shift drum 39, which is disposed parallel to the guide shaft 37. The shift drum 39 has a shift lever fixed to one end thereof.
40 in one direction or the other, the shift fork 3B can be displaced to the right or left by the guiding action of the cam groove 39a, and the switching gear 33 can be shifted to the forward position or the backward position. can.

7iJ-order inertial force balancing shaft 22 is synchronously rotated from the crankshaft 20 via a driving gear 41 and a driven gear 42 having the same diameter. The weight 22B of this counterbalance @22 is provided at a position where it enters between the pair of opposing crank webs 20a, 20a when approaching the crankshaft 20, but this weight 22a K, E Since the primary inertia force balancing effect of the engine E is well known, its explanation will be omitted.

The pump drive shaft 23 is driven by the crankshaft 20 via a chain transmission 43. A lubricating oil bonder 44 is connected to one end of this pump drive shaft 23, and a cooling water pump is connected to the other end. +5 can be easily attached and detached as follows.

That is, a rotary shaft 47 having an impeller 46 of the water pump 450 is connected to the pump drive shaft 23 via a removable joint 48, and a pump housing 49 that supports the rotary shaft 47 and houses the impeller 46 is connected to the engine. It is fixed to the crankcase 50 of E by a bolt 51. Therefore, by removing the port 51, the water pump 45 can be easily taken out from the engine E, which is convenient for maintenance.

In addition, when the engine E is an air-cooled type, the water bong 45 is removed in this way, and a suitable white blind cover is applied to the opening of the crankcase 5o behind the pump housing 49.

As shown in FIGS. 5A and 5B, the outer surface pressure on the o-tube 251 of the power generation m25 is the signal protrusion 5 of the ignition pulser.
The pick-up coil 53 of the ignition pulser has its base plate 53a mounted on the M support base 54 in the crankcase 60 so that it faces the signal protrusion 52 with a certain gap in its rotation path. ) 55. In order to easily adjust the position and attach/detach the pickup coil 53, a working window 56 is provided on the end wall of the crankcase 5o facing the pickup coil 53, and this window 56 is normally closed by the character f5N. The pair of belt type automatic transmissions M and M' are connected to both ends of the output shaft 210 of the engine E and left and right drive wheels Wf.

Wf' are arranged so as to connect each other. Therefore, both driving wheels Wf and Wf' are connected to automatic transmissions M and M, respectively.
' is connected to the output shaft 21 in parallel.

Since the belt type automatic transmissions M and M' have the same structure, only the structure of the one on the left M will be explained.

A variable diameter drive pulley 58 is attached to the end of the output shaft 21, and a driven shaft 59 with a variable diameter of 6 mK, which serves as the input shaft of the reduction gear mechanism R, is attached to the end of the output shaft 21, and both grooves 68. ，
Endless V-belt 6o between 59 and 2! 1! It is stretched. The driving pulley 68 includes a centrifugal mechanism 62 that operates to increase its effective diameter as its rotational speed increases, while the driven pulley 59 includes a spring 63 that constantly operates to increase its effective diameter. Through the interaction of the centrifugal mechanism 62 and the spring 63, the gear ratio between the output shaft 21 and the driven shaft 61 is automatically decreased as the rotational speed of the output shaft 21 increases.

A wheel drive shaft 65 is provided at the outer end of the output shaft 64 of the reduction gear mechanism R.
is spline-coupled to this wheel drive shaft 65,
An axle 67 fixed to a hub 65 of a drive wheel Wf is connected via a constant velocity joint 68. Therefore, the power that has been shifted and transmitted to the driven shaft 61 is appropriately torque amplified by the reduction gear mechanism R, and then transmitted to the axle b7 via the wheel drive shaft 65 and the constant velocity joint 68, and the power is transmitted to the axle b7 through the wheel drive shaft 65 and the constant velocity joint 68. 11J
Drives wheel Wf.

The left and right drive wheels W are connected via such automatic transmissions M and M'.
Since f and Wf' are connected in parallel to the output shaft 21,
When a rotational speed difference occurs between the two driving wheels Wf and Wf' due to vehicle turning, etc., both automatic transmissions M,
A difference is generated in the gear ratio of M', and as a result, the output torque of the output shaft 21 is divided into nine parts according to the 1d rotation speed of both driving wheels Wf and Wf'. That is, the automatic transmissions M and M' each perform a normal speed change function, and can also work together to perform a differential function.

The casing 7o of the power unit P includes a crankcase 50 that accommodates and supports the crankshaft 2o, output shaft 21, etc. of the engine E, and an automatic transmission M that extends rearward from both left and right ends of the crankcase 50.

A pair of mission cases 71°71 that accommodate and support M'
' are integrally connected to form a rigid body VC#g, and both transmission cases 71 and 71' are arranged substantially horizontally so as to sandwich the front end of the vehicle body frame F from left and right. In this way, the space between the two transmission cases 71 and 71' can be effectively used as body space, making the vehicle more compact, and also contributing to lowering the center of gravity of the 74W (22)P. can.

Crank case 50 and each transmission case 71°71'
There is a partition wall 72 between them that partitions them oil-tightly, and inside each transmission case 71, 71' there are each automatic transmission M, M.
A partition wall 73 is provided that oil-tightly partitions between the speed change mechanism including both googly 58 and 59 of ' and the reduction gear mechanism R.
As for the lubrication method, a dry type is used in the transmission mechanism of each of the variable transmissions M and M', and a wet type is used in the reduction gear mechanism R.

The casing 70 is divided into several blocks and cast as follows. That is, the central part of the crankcase 50, the intermediate part between the central part and each transmission case 11° 11', and the central part of each mission case 71° 71' are divided at a plane perpendicular to the axis of the crankshaft 20. The blocks thus divided are called first to sixth blocks 7L to 70a from the left in FIG. These blocks? 4
1°~70. are bolted between adjacent comrades.

2nd to 5th blocks 70. ~70. Support brackets 74 to 77 are integrally protruded from the outer surface of the power unit. A single pivot shaft 8 disposed parallel to the crankshaft 20 to connect the P to the vehicle body frame F.
3 is held. At that time, each support bracket 74 to 77
The support surfaces of the support caps 79 to 82 are each formed into a semicircular shape that is easy to process and can be brought into close contact with the circumferential surface of the pivot shaft 83. A through bolt 78 is passed through the pivot 83. Thus, the second to g5 blocks 70. ~
70. are also connected to each other by a pivot 83, increasing the bonding strength.

In addition, each introduction's support bracket and cap? +, 79
The mating surfaces of Niar 5, 80, Niar 6, 81, and Niar 7° 82 are shifted in phase from each other in the circumferential direction of the pivot shaft 83. In this way, the relatively weak parts of the support brackets 74 to 17 and the plurality of through bolts 78 are not biased in one direction, and the pivot shaft 83 can be firmly supported in all directions.

The pivot 83 is connected to the support bracket 74°1 at the inner and outer i11 positions.
In 111I of 7, a pair of left and right suspension spring devices Sf
, Sf' to the left and right support plates 1a of the vehicle body frame F,
Supported by la'. In the illustrated example, suspension spring devices Sf, S
f' is constructed in the Neidhardt type, and since they have the same structure, only the one on the left Sf will be explained. As shown in FIG. Housing 9 with a spring chamber 91 of
0, a spring operating body 92 whose basic shape has a hexagonal cross-sectional shape and is accommodated in the spring chamber 91, and a spring operating body 92 that is filled between the housing 90 and the spring operating body 92 at the six corners of the spring chamber 91. The spring actuating body 92 is fixed to the pivot shaft 83 by multiple-sided fitting or a snow line fitting. A mounting flange 94 is integrally formed on the outer peripheral surface of the housing 90 and projects over half the circumference thereof.

On the other hand, a semicircular support recess 95 that opens toward the front is formed in the support plate 1a*1a' of the vehicle body frame F, and the housing 90 is fitted into this recess 95, and the mounting flange 94 is attached to the support plate. Multiple bolts 96 on 1a, 1m'
It is fixed by

P is the left and right drive wheels Wf.

When Wf' swings around the pivot shaft 83 as Wf' moves up and down, the spring actuating body 92 rotates relative to the housing 90 and compresses and deforms all the rubber springs 93 at the same time. The repulsive force of the spring 930 causes the drive shafts Wf, W
f' is elastically suspended. By the way, since the casing 70 of the power unit P constitutes a rigid body as described above and connects the two driving wheels Wf, Wf', it has a stabilizer function that suppresses the vertical vibration of one driving wheel by the other driving wheel. will be prepared.

In order to damp the upward F motion of both driving wheels Wf and Wf',
Hydraulic bolts 97 are interposed between the support plates 1a, ia' of the vehicle body frame F and the transmission cases 71, 71'.

The pivot shaft 83 is arranged so as to pass through one center of the forwarder unit P. In this way, the drive wheels Wf, Wf'
It is possible to significantly reduce the inertia of the swing system around the pivot shaft 83 consisting of the 9-wheel unit P, and as a result, the road surface followability of the driving wheels Wf, Wf' is improved as well as the Neidhard type splashing device. The load burden on Sf and Sf' is reduced.

Historically, in order to reduce the moment of inertia, in the illustrated example of the steam engine, the balancing shaft 22 and the starter motor 2, which are relatively heavy, are
4 and water pump 45 are drive wheels Wf.

It is placed at the front of the engine E so as to balance the loss of Wf'. It should be noted that arranging the water bonder 45 partially in front of the engine E allows its maintenance to be carried out without being obstructed by the vehicle body frame F, which is convenient.
1.71' is integrally formed with a support tube 100 that surrounds the wheel drive shaft 65, and the outer film 101 rotatably supported by this support tube 100 has a corresponding drive wheel Wf. A knuckle 102 that rotatably supports the hub 66 of the constant velocity joint 68 is connected via a pair of king pins 103 that are coaxially arranged to sandwich the swing center of the constant velocity joint 68. It is connected to the steering wheel 13 via a mechanism. Therefore, by rotating the steering handle 130 times, the knuckle 10
2 around the king pin 103, the drive wheel Wf
, Wf' can be converted.

Furthermore, the driving wheels Wf, W corresponding to the Natsu~cru 102 are
The back plate of the brake device B (drum type in the illustrated example) 104 of the brake unit f' is fixed, and this pack grade 104
In order to prevent zero rotation, a restraining arm 105 protruding from the outer surface of the outer cylinder 101 is connected to the vehicle body frame F via a torque rod 106. Therefore, during braking, the braking torque acting on the pack grate 104 is the knuckle 102, the outer 1
101 and the vehicle body frame F via the torque rod 106.
supported by. Further, when the power unit P swings around the pivot shaft 83, the outer cylinder 1 is connected to the knuckle 102 so that the proper alignment of the drive wheels Wf, Wf' is maintained.
A relative rotational displacement between 01 and the support tube 100 is allowed.

A rear fork 111 is pivotally attached to the rear end of the vehicle body frame F via a pivot shaft 110 so as to be able to swing vertically, and the driven wheel Wr is pivotally supported at the rear end of the rear fork 111 . In order to suspend the rear fork 111, a spring device S having the same structure as the Titonolt type spring device Sf is installed between the pivot shaft 110 and the rear fork 111.
r is interposed.

Also rear fork 111 and body frame pHJIK&'
@Hydraulic damper 1 for damping the vertical motion of the driven wheel Wr
12 is interposed.

As described above, according to the present invention, 1. A power unit is constituted by an engine and a pair of transmission devices that individually transmit the power of the engine to a pair of left and right drive wheels, and the casing of this power unit is formed into a rigid body. The casing supports the two driving wheels, and is swingably connected to the vehicle body frame via a pivot fixed to the casing so as to allow vertical movement of the two driving wheels, and between the pivot shaft and the vehicle body frame. Since a suspension spring device is interposed in the power unit, the casing of the power unit can perform the function of a swing arm that suspends the drive wheel, and can swing as the drive wheel moves up and down, thus eliminating the need for a special swing arm. Furthermore, since the casing can also perform a stabilizer function and suppress vibrations of each driving wheel, there is no need to provide a special stabilizer. In addition, it also serves as a mounting member on the casing side of the suspension spring device, and as a result of the above,
Simplification and compactness of the structure of the entire device should be achieved.

The pivot shaft also includes semicircular support surfaces of a plurality of support brackets protruding from the casing, and semicircular support surfaces of a plurality of support caps connected to these support brackets via through bolts. The through bolt not only connects the support cap to the support bracket, but also serves to position the pivot shaft, prevent it from rotating, and prevent it from being removed. Also accomplished,
Therefore, the pivot can be easily and securely fixed to the casing at a predetermined position.

Note that the suspension spring device is not limited to the Neidhard type as in the above embodiment, but may be a coil spring interposed between the swing arm fixed to the pivot shaft and the vehicle body frame, for example. It can also be configured to be telescopic.

[Brief explanation of the drawing]

Figures 1 to 7 show an embodiment of the present invention.
- Figure 1 is a perspective view of the separated body frame and power unit of the vehicle, Figures 2 and 3 are a plan view and side view of the vehicle, Figure 4 is a side view of the power unit, and Figure 5 is a side view of the power unit. The figure is a longitudinal cross-sectional plan view of the main parts of the power unit, No. 8
Figure A is an enlarged longitudinal sectional plan view of the engine section of the same power unit.
sB■ is a sectional view taken along the line VB-VB in FIG. 6A, FIG. 6 is a side view of the power transmission system of the engine, and FIG. 7 is a -■- in FIG.
■It is a line enlarged sectional view. E-...Engine JF float body frame, M, M'-...
Automatic transmission constituting the transmission device, P...power unit, Sf, Sfl...suspension spring device, F f , F
fl...Drive wheel TO...Casing, 74-T7...Support bracket, T8...Through bolt, 79-82...Support cap, 83...Axis patent applicant Honda Motor Co., Ltd.

Claims (1)

[Claims] In a vehicle equipped with a pair of left and right drive wheels, an engine and
A power unit is constituted by a pair of transmission devices that transmit the power of the engine to each of the driving wheels, and the casing of the power unit is formed into a rigid body, and the casing of the power unit is formed into a rigid body.
A plurality of support brackets are protruded from the casing, and a plurality of support caps are connected to the semicircular support surfaces of these support brackets and are connected to the support brackets through threaded holes. A pivot shaft disposed in the arrangement direction of both ## wheels and penetrated by the through bolt is sandwiched between the semicircular support surface and the pivot shaft is inserted through the pivot shaft to allow vertical movement of both #1IAa wheels. A power unit support, drive wheel drive, and suspension system in a vehicle, which is swingably connected to the vehicle body frame, which is the casing.