JPH05319224A - Vehicle cross mover and control device thereof - Google Patents

Abstract

PURPOSE:To provide a vehicle cross mover and a control device thereof for a truck, excellent in load resistance and stability possible to safely and surely operate the mover almost automatically by a simple structure. CONSTITUTION:A vehicle cross mover is constituted of a pulley 21 provided in a transmitting shaft system, plurality of vertically movable grounding wheels 25, 25' arranged in parallel with a space in both sides of this pulley at lower down time and a plurality of intermediate wheels 37, 37' lifted by an actuator or the like and brought into contact with also the pulley while pressing down the grounding wheels at operation time, and also providing a control means of the actuator by a signal from a detector or the like possible to detect a safety condition of load weight, its unevenness, tilt of a road, etc., and by a command signal of a driver.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for traversing a vehicle, particularly a truck, and its control device.

[0002]

2. Description of the Related Art In a so-called 2WS vehicle in which only front wheels are steered, for example, when parking in a narrow place, it is necessary to repeat the turning operation of the steering wheel, which is extremely inconvenient for an experienced driver. The so-called fifth wheel device described in Japanese Utility Model Laid-Open No. 59-19481, Japanese Utility Model Laid-Open No. 1-77584 and others has been proposed. For these, one ordinary tire is used as the fifth wheel, which is normally supported flatly on the rear lower surface of the vehicle by a supporting member, and is rotated by an actuator when used to move in the width direction of the vehicle. It is intended to raise the rear wheels of the vehicle so that the vehicle can move laterally. However, these are supported by one tire and support the vehicle near the center in the vehicle width direction at the rear of the vehicle. Therefore, it is difficult to use it for load resistance and stability in trucks etc. that need to be parked with luggage, as well as passenger cars. However, like the lateral running device for an automobile disclosed in JP-A-55-136640 (hereinafter, the numbers in parentheses are the numbers in the above-mentioned publication), which are parallel to each other on the underside of the chassis of the automobile and near the front and rear wheels in the vehicle length direction. A pair of left and right transmission shafts (12) for lateral travel extending up to and below are rotatably installed, and a driven pulley (14) is attached to an intermediate portion of each transmission shaft (12), and hydraulic cylinders are provided at both ends of the shaft (12). A pair of lifting arms (1) rotatable about the shaft (12) by means of (13).
7) and a pair of drive sprockets (18a) which are keyed to the shaft and rotate integrally with the shafts, and the lateral wheels (19) are provided at the free ends of the lifting arms (17).
And the drive chain (2
0), the driven sprocket (18a) is driven by the driven sprocket (18a), and the pair of the above-mentioned pair of the transmission sprocket (18) is connected to the output shaft end of the vehicle transmission (3) via the transmission belt (15). A pulley (11) for driving a driven pulley (14) is provided, and the laterally traveling wheel (19) is rotated leftward or rightward by inserting the speed change lever to the reverse gear or the low gear, so that the vehicle can laterally traverse. In this case, since four laterally running wheels (19) are provided and the wheels (19) are arranged at approximately even positions with respect to the longitudinal and lateral centers of the automobile, the load bearing capacity is increased. In terms of stability and stability, it may be used in trucks.

[0003]

However, the lateral traveling device disclosed in the above-mentioned Japanese Patent Laid-Open Publication is not only complicated in structure, but also the lateral traveling wheels of the front and rear of the vehicle due to the lateral traveling transmission shaft (12). Since (19) is connected and driven, it requires a lot of space. Further, the transmission shaft (12), the driven pulley (14), the lifting arm (17), and the laterally traveling wheel (1
9), driving, driven sprockets (18a, 18b), chain (20), and the like are almost all supported by the vehicle body (8), so the sprung load increases and the lateral lift ( Lifting) Increase the load to increase the size of the device and increase the weight. Further, as described above, the lateral traveling device is supported by the vehicle body (8) via the bearings (13), but the vehicle body at the portion receiving the reaction force when the vehicle is lifted cannot endure as it is and is reinforced. Therefore, the weight of the vehicle itself may be increased, and the performance of the vehicle itself may be deteriorated. Furthermore, when operating the above-mentioned lateral traveling device, the driver does not do anything at all. First, the transmission lever is set to the neutral position and the switching valve (164) is used to operate the hydraulic cylinder (1).
6) is operated to rotate the elevating arm (17) to ground the four laterally traveling wheels (19) and raise the arm (17) to lift the vehicle. After that, the lift switch is connected to the electromagnetic clutch of the drive pulley (11), the speed change lever is set to the first speed or reverse, the foot clutch is connected, and the lateral drive shaft (12) is rotated. Operation is required. In view of the above, the present invention has (a) no concern about load resistance and stability, (b) simple structure and small space, (c) relatively small sprung load, and (d) vehicle. (E) A vehicle that can be operated safely and reliably and automatically almost without increasing the vehicle body load of
An object of the present invention is to provide a vehicle lateral running device and a control device therefor, which are particularly suitable for trucks.

[0004]

According to the present invention for achieving the above object, a pulley provided on a transmission shaft system and, when descending, are vertically movable which are arranged in parallel on both sides of the pulley with a space therebetween. An invention of a vehicle traversing device comprising a plurality of ground wheels and a plurality of intermediate wheels that are moved up and down by an actuator and are in contact with the pulley while pushing down the ground wheels during operation, and a transmission shaft system. A pulley, a plurality of vertically movable grounding wheels that are arranged in parallel on both sides of the pulley at a time of descending, and a plurality of grounding wheels that move up and down by an actuator and press down the grounding wheel while operating and contact the pulley. In a vehicle equipped with a vehicle traverse device consisting of an interval, a signal from a detection device capable of detecting a safety state including luggage weight, luggage deviation, road inclination, etc. and a command signal based on the driver's action, Consisting invention of a control apparatus for a vehicle traversing apparatus characterized in that a control means for issuing a drive-stop signal to the actuator.

[0005]

[Operation] When the vehicle is stopped next to an empty place for the purpose of parking, etc., the engine is rotating (idling) and the vehicle speed is 0.
(Stopping) and depressing the brake pedal under the condition that the transmission gear is in neutral, the system circuit of the entire device is turned on.
N, further, if the weight of the luggage is less than or equal to a predetermined value, there is no unevenness in the luggage, and the cant level on the road is less than or equal to the predetermined value,
The traverse device can be operated. In this state, if the lift switch is turned on, the actuator operates in the down direction of the intermediate wheel, and the intermediate wheel pushes down the grounding wheel that has been lifted up, and the vehicle is levitated by the grounding wheel while making contact with the pulley. The rear part of the vehicle or the entire vehicle is supported only by the ground wheel, and the driving of the actuator is stopped in this state. If the transmission gear is set to the first speed or reverse here, the engine power is transmitted from the pulley provided on the transmission shaft system to the grounding wheel via the intermediate wheel by stepping on the accelerator pedal after confirmation of the rotation. Therefore, the vehicle turns around the center of the front axle as a fulcrum (so-called front engine-rear drive type vehicle) or traverses at a right angle to the vehicle (so-called all-wheel drive type vehicle). You can move to other places.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A vehicle to which the present invention is applied is most preferably a small vehicle such as a small truck or a bus, but can be sufficiently applied to a large vehicle by increasing the size of the device. As shown in FIGS. 8 and 9, the small vehicle is provided with an engine 2 under the inner floor of a cab 1, and its power is transmitted through a clutch 3, a transmission 4 and a propeller shaft 5 which is a main component of a transmission shaft system. In addition to the so-called front engine-rear drive type vehicle A that transmits from 6 (hereinafter referred to as differential) to the rear wheels 7, a transferer (power distributor) 8 is provided at the rear portion of the transmission 4 as shown in FIGS. The rear propeller shaft 5'and the front propeller shaft 9 are respectively passed through the rear differential 6 and the front differential 10 to form the rear wheel 7.
There is a so-called all-wheel drive type vehicle B that transmits engine power to the front wheels 11. The vehicle transverse devices 20, 20 'of the present invention are provided near the rear differential 6 in the front engine-rear drive vehicle A, and near the rear differential 6 and the front differential 10 in the front wheel drive vehicle B, respectively. An example of the details provided near the rear differential 6 (Fig.
7), 21 is a pulley provided on the flange portion 6b of the input shaft 6a of the rear differential 6 in the transmission shaft system. As shown in FIG. 6, the inner cylinder 22 is attached to the flange portion 6b.
A barrel-shaped rubber ring 23 is baked on the outer periphery of the outer cylinder 22b of the double cylindrical body 22 into which a is fitted. The bolt 24 is passed through the bottom wall 22c of the double cylindrical body 22 to form the flange 6b.
Together with this, it is configured to be fastened together with the universal joint 5a of the propeller shaft 5. Numerals 25 and 25 'are grounding wheels, and a shaft 27 and a bearing 28 are provided at one end of an arm 26 movably up and down so as to be arranged in parallel on both sides of the pulley 21 when they are grounded. The other end of the arm 26 is supported by a suspension spring 3 via a torsion bar 29 as shown in FIGS.
It is supported integrally with the seat 33 of the rear axle 32 connected to the U-bolt 31 or to the support portion 34 fixed to the seat 33, and is always upward by the torsion bar 29 (the position of the phantom line in FIG. 1). It is urged to be flipped up. As shown in FIG. 5, the grounding rings 25 and 25 'are formed by baking a barrel-shaped rubber ring 36 around the outer periphery of a tubular body 35 having a boss portion 35a at the center.
Needle bearing 28 having bush 28a provided in 5a
It is attached to the shaft 27 via. Reference numerals 37 and 37 'denote intermediate wheels, which are in contact with the grounding wheel 2 during operation as shown in FIGS.
5, 25 ′ is pressed against the pulley 21 while being pushed down. As shown in FIG. 4, a cylinder 40 having a barrel-shaped rubber ring 39 baked is mounted on the outer periphery of the substantially cylindrical body 37 a via a bearing 38. In this example, the intermediate wheel 37 (37
The rotating shaft 41 is provided with the rotation center S ₂ eccentric from the center axis S _{1 of} ′) by a predetermined value e. Both intermediate wheels 37, 37
′ Is supported near the lower ends of the holding member 42 having a U-shaped cross section through the rotary shaft 41. At this time, the intermediate wheel 37 (3
The central axis S ₁ of 7 ') is located almost above the rotational center S ₂ of the rotary shaft 41. As a result, when the intermediate wheels 37, 37 'are brought into pressure contact with the pulley 21 and the ground wheels 25, 25', the intermediate wheels 37, 37 'are corrected to a position where these forces are balanced and a smooth operation is possible. Incidentally, the pulley 21, the grounding wheel 25 (25 ') and the intermediate wheel 37 (37
′) And the cross-sectional shapes of the rubber rings 23, 36 and 39 are the same. The upper ends 42a of the holding members 42 of the intermediate wheels 37, 37 'are extended to the left and right, and the protruding side 43a of the intermediate part of the crank arm 43 is fixed to the side surfaces near both ends (corresponding to the rear side of the vehicle). Crank arm 43
One end of the pin 4 to the side of the rear differential 6 on the rear axle 32.
4 rotatably supports the crank arm 43
The other end of is connected to an operating arm 45a of a hydraulic actuator 45 supported by the vehicle body B by a link 46. The vehicle traverse device 20, 20 'of the present invention having the above-described configuration is shown in FIG.
In the front engine-rear drive type vehicle A of FIG. 9, the vehicle is arranged only near the rear differential 6, and in the front wheel drive type vehicle B of FIGS. 10 and 11, not only the rear differential 6 but also the vehicle traverse device 20. ′ Is also arranged near the front differential 10. In this case, in the vehicle A, as shown in FIG. 9, the traverse device of the present invention rotates about the intermediate point O of the front wheel 11 during operation, so that the point O and the two ground wheels 25, 25 'are rotated.
It is desirable that the axis of the shaft 27 is located on the lines C ₁ and C ₂ connecting the shafts 27 of FIG. When the shafts 27 of the ground wheels 25, 25 'are arranged as described above, it is desirable that the intermediate wheels 37, 37' also take this into consideration.
Since the outer circumferences of ′) and 37 (37 ′) are barrel-shaped, there is no problem with some deviation. In the vehicle B, as shown in FIG. 11, the traverse device 20 provided near the rear differential 6 and the traverse device 20 ′ provided near the front differential 10 are both installed at right angles to the traveling direction of the vehicle B during operation. The overall drive and control device of the traverse device 20, 20 'of the present invention is as shown in FIG. That is, in FIG. 7, reference numeral 47 denotes a hydraulic pump driven by the engine E, and pressure oil generated by the hydraulic pump 47 is piped to the power steering unit 49 and the pressure oil actuator 45 via an electromagnetic switching valve 48. 50 is a CPU, interface, RAM, ROM
The controller consists of an engine rotation sensor 51 provided on the engine E, a vehicle speed sensor 52 and a neutral sensor 53 provided on the transmission 4, a brake switch 54 that is turned on when the brake pedal B is depressed, and a lift switch 5.
5, signals from detection devices such as the load sensor / bias load sensor 56 and the cant level sensor 57 are input, and comparison and calculation are performed based on the signals to drive to the electromagnetic switching valve 48 and the indicator lamp (not shown). Alternatively, a command number for stop or display is sent. "FIG. 12 shows a flow chart of the vehicle traverse device of the present invention, and the operation of the present invention device will be described below based on the flow chart. FIG. 12 shows that the vehicle stops beside an empty place for the purpose of parking or the like. The process when the vehicle is about to traverse will now be described. First, at the time of its operation, the signals from the various sensors 51, 52, 53, 56, 57, the brake switch 54, and the lift switch 55 are read into the controller 50 (step P ₁ ), and the engine is read. Is rotating (step P ₂ ), the vehicle speed is O (step P ₃ ), and the gear of the transmission 4 is neutral (step P ₄ ), the brake switch 54 is turned on by depressing the brake pedal B. (Step P ₅ ),
The traverse system circuit is turned on (step P ₆ ). In this state (before the brake is depressed), the weight of the load is further below the predetermined value (step P ₇ ), the load is not biased (step P ₈ ), and the cant level is below the predetermined value (step ₉ ), The lift switch can be turned on. When the lift switch 55 is turned on in step P ₁₀ , the electromagnetic switching valve 4 is operated to drive the intermediate wheels 37, 37 ′ in the descending direction.
8 is switched to send the pressure oil from the hydraulic pump 47 to the hydraulic actuator 45. This allows the hydraulic actuator 45
2 is operated, the operating arm 44 is rotated from the phantom line position in FIG. 2 to the solid line position, and the holding member 42 that supports the intermediate wheels 37 and 37 ′ via the link 46 and the crank arm 43 is also moved from the phantom line position to the solid line position. Rotate to the position (step P ₁₁ ). The intermediate wheels 37, 37 'are brought into contact with the pulley 21 by pushing down the grounding wheels 25, 25' by their operation, and the grounding wheels 25, 25 'are further pushed down, eventually grounding and making the vehicle levitate. At the upper limit, the electromagnetic switching valve 48 is switched by a command from the controller 50 to stop the hydraulic actuator 45 (step P ₁₂ ), and this state is maintained. If the speed change gear of the transmission 4 is in the first speed (1st) or reverse (REV) in step P ₁₃ , the preparation for the traverse operation is completed. Here, when the accelerator pedal is depressed, the pulley 21 rotates, whereby the grounding wheels 25, 25 'rotate via the intermediate wheels 37, 37'. Therefore, in the vehicle A, the rear portion around the point O in FIG. The vehicle B rotates, and the vehicle B moves at a right angle to the normal traveling direction of the vehicle B so that the vehicle B can be parked at a desired location.

The present invention includes a pulley provided on a transmission shaft system,
A plurality of vertically movable grounding wheels that are arranged in parallel on both sides of the pulley when descending, and a plurality of intermediate wheels that move up and down by an actuator and press down the grounding wheel when operating and contact the pulleys; An invention of a vehicle traversing device comprising: a pulley provided on a transmission shaft system; and a plurality of vertically movable grounding wheels arranged in parallel on both sides of the pulley when descending. , A vehicle equipped with a vehicle traversing device that is moved up and down by an actuator and pushes down the grounding wheel when operating, and a plurality of intermediate wheels that are also in contact with the pulley, and is in a safe state including baggage weight, baggage deviation, road inclination, etc. Of a vehicle traverse device, which is provided with control means for issuing a drive / stop signal to the actuator in response to a signal from a detection device capable of detecting a vehicle and a command signal based on a driver's action. Since it comprises the invention of the device, it has a simple structure and requires a small space, but it can withstand a large load and has good vehicle stability. Further, the sprung load is relatively small, and if the lifted portion is located near the differential, the reinforcement of the vehicle body is almost unnecessary and the vehicle body load of the vehicle is not increased. In addition, the operation can be automatically performed, which is safe and reliable.

[Brief description of drawings]

FIG. 1 is a front view of a main part of a vehicle traverse device of the present invention,

FIG. 2 is a side view of the same,

FIG. 3 is a perspective view showing the arrangement of the pulley, the intermediate wheel, and the ground wheel during operation,

FIG. 4 is a sectional view of an intermediate wheel of the vehicle traverse device of the present invention,

FIG. 5 is a sectional view of the grounding wheel,

FIG. 6 is a sectional view of the pulley,

FIG. 7 is an overall system diagram of a vehicle traverse device of the present invention,

FIG. 8 is a schematic front view of an example of a vehicle to which the vehicle traverse device of the present invention is applied,

FIG. 9 is a schematic plan view of the same.

FIG. 10 is a schematic front view of another example of a vehicle to which the vehicle traverse device of the present invention is applied,

11 is a schematic plan view of the same,

FIG. 12 is a flow chart when the vehicle transverse device of the present invention is in operation. 1; Cab, 2; Engine, 4; Transmission, 5, 5 ', 9; Propeller shaft, 6; Rear differential, 7; Rear wheel, 8; Transfer gear, 10; Front differential, 11; Front wheel, 20, 20 ′; Vehicle traverse device, 21; Pulley, 25, 25 ′; Grounding wheel, 26; Arm, 27; Shaft, 29; Torsion bar, 30; Suspension spring, 32; Rear axle, 37, 37 ′; Intermediate wheel, 42; Holding member, 43; Crank arm, 44; Actuating arm, 45; Actuator, 46, Link, 47; Hydraulic pump, 48; Electromagnetic switching valve, 50; Controller, 51; Engine rotation sensor, 52; Vehicle speed sensor, 53, Neutral Sensor, 54; Brake switch, 55; Lift switch, 56; Load sensor / unbalanced load sensor, 57; Cant level sensor.

Claims (2)

[Claims] 1. A pulley provided on a transmission shaft system, a plurality of vertically movable ground wheels arranged in parallel on both sides of the pulley at a time of descending, and an actuator for raising and lowering,
A vehicle traverse device, comprising: a plurality of intermediate wheels that are in contact with the pulley while pushing down the ground wheel during operation. 2. A pulley provided on the transmission shaft system, a plurality of vertically movable grounding wheels arranged in parallel on both sides of the pulley at a time of lowering, and an actuator for moving up and down,
In a vehicle equipped with a vehicle traverse device consisting of a plurality of intermediate wheels that are in contact with the pulley while pushing down the ground wheel during operation,
A control means is provided for issuing a drive / stop signal to the actuator in response to a signal from a detection device capable of detecting a safety condition including load weight, load bias, road inclination, etc. and a command signal based on the driver's action. A control device for a vehicle traversing device.