JPH0715806Y2 - 5th wheel lifting device for turning - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to an elevating device for vertically moving a fifth turning wheel provided on a lower surface of a rear portion of a vehicle in order to laterally move the vehicle.

<Prior Art> A normal so-called 2WS car that steers only the front wheels needs to repeat the turning operation that frequently performs the steering wheel operation when parking in a narrow place, which is extremely inconvenient for an experienced driver. The inventor of the present invention is the actual application Sho 62
-174087 (see Japanese Utility Model Laid-Open No. 01-77584) was proposed.

As shown in FIG. 7 to FIG. 10, this crosses a guide rail 2, 2'provided in the front-rear direction of the front wheel drive type automobile 1 which can lock one of the front wheels, in the longitudinal direction of the vehicle through a slider 3. A fifth wheel for turning (hereinafter referred to as the fifth wheel) via a spindle S to a wheel carrier 7 that is provided integrally with an arm 5 that rotatably supports the member 4 and is rotatably attached to the cross member 4. 6 is supported, and a link 8 is attached to the vehicle body on one end of the carrier 7 via a pin 9 and a bracket 10 so that the carrier 7 can rotate in the longitudinal direction of the vehicle.
And connect the cross member 4 to the actuator 12
A vehicle was devised in which the fifth wheel 6 was moved from the horizontal to substantially vertical by the rod 13 of FIG.

This car is a so-called FF car that drives the front wheels.
As shown in FIG. 10, for example, a transaxle 19 including an engine 16, a clutch 17 and a differential mechanism 18 is installed in series on the axes of the front wheels 14 and 14 ', and the power of the engine 16 is transmitted through these drive mechanisms. It is configured to transmit to the front wheels 14, 14 '.

Further, as shown in FIG. 9, the automobile 1 uses a so-called diagonal split system as its service brake system, and one of the split master cylinders 21 operated by the brake pedal 20 is a brake 14'a for the left front wheel 14 '. To the brake 15a of the right rear wheel 15 through the brake pipe 22, and the other is the brake 14a of the right front wheel 14 and the left rear wheel 1
The brake pipe 22 'is connected to the 5'brake 15'a, and is further connected to the master cylinder 21 by, for example, JP-A-60-12.
When the braking switch 24 is turned on by providing the electromagnetic check valve 23 of the braking device as shown in Japanese Patent Publication No. 360,
Brake fluid is trapped in 22 'and brake 14a of front wheel 14
And the brake 15'a of the left rear wheel 15 'is locked.

When the automobile 1 having the above-mentioned configuration is going to be parked in a narrow space, the front portion of the automobile 1 is slid into the place where the vehicle is to be parked from the rear, the brake pedal 20 is stepped on and the foot brake is applied, and the rod of the actuator 12 is pushed. 13 cross guide 4 through slider 3 guide rail 2,
When the link 8 is slid to the side of the link 8 in 2 ', the link 8 is rotated downward to act as the wheel carrier 7 and make the fifth wheel 6 substantially vertical from the horizontal. As a result, the rear wheels 15, 15 'of the vehicle float, so that one of the front wheels (for example, the right wheel 14) is locked in the braking state by the brake switch 24, and the foot brake is released to brake the left front wheel 14'. If a is released and car 1 is moved forward, the differential mechanism
The other left front wheel 14 'of the front wheels is rotated forward by 18 and therefore the vehicle 1 is rotated by the fifth wheel 6 around one of the front wheels 14 to park the vehicle at a predetermined parking position.

After the parking is completed, the foot brake is applied again, and then the rod 13 of the actuator 12 is contracted to slide the cross member 4 in the guide rails 2 and 2'to the opposite side of the link 8, so that the link 8 is moved upward. The wheel carrier 7 is rotated while turning the fifth wheel 6 from vertical to horizontal. As a result, the rear wheels 15, 15 'of the vehicle land, so that one of the front wheels (for example, the right wheel 14) is unlocked and the normal parking brake is applied.

When exiting from the parking position, the foot brake is applied in the same manner as described above, and then the rod 13 of the actuator 12 is used to move the cross member 4 through the slider 3 and the guide rails 2, 2 '.
When the link 8 is slid to the inside of the link 8, the link 8 is rotated downward and serves as the wheel carrier 7 to make the fifth wheel 6 substantially vertical from the horizontal. As a result, the rear wheels of the car 15,1
5'is floating, so here one of the front wheels (eg right front wheel 14)
Lock the brake in the same manner as above, and lock the left front wheel 14 '
When the vehicle 1 is moved backward by releasing the foot brake for braking the brake 14'a, the other left front wheel 14 'of the front wheels is rotated rearward by the differential mechanism 18, so that the one front right wheel 14 of the front wheels is rotated. The fifth wheel 6 causes the vehicle 1 to rotate in the opposite direction to the center, causing the rear part of the vehicle to escape from the parking position. If the foot brake is applied again, the rod 13 of the actuator 12 is reversely operated as described above, and the cross member 4 is slid in the guide rails 2, 2'through the slider 3 in the direction away from the link 8. , The link 8 is rotated upward to make the wheel carrier 7 move the fifth wheel 6 from the vertical state to the horizontal state. As a result, the rear wheels of the car 15,1
Since 5'is landing, the foot brake and the brake lock should be removed, the ordinary retreat operation is performed, and then the forward movement is performed.

With the above configuration, parking becomes much easier than before, and if the function originally possessed by the car is used,
Since there is no need to provide a special drive mechanism for driving the fifth wheel, the mechanism can be simplified, the cost can be reduced, the weight can be reduced, and the weight balance does not cause any problem.

<Problems to be Solved by the Invention> However, in the turning fifth wheel lifting device according to the invention of the above-mentioned Japanese Utility Model Application, when the fifth wheel 6 comes into contact with the ground to lift the rear part of the vehicle, Most of the reaction force of the slider 3 is pushed by the rod 13 of the actuator 12 via the cross member 4 while the slicer 3 slides in the guide rails 2 and 2 ', so that the slider 3 cannot slide. Become smooth,
If either of the left and right sliders 3, 3 is slid between the guide rails 2 or 2 ', the force transmitted from the actuator 12 to the cross member 4 is concentrated on the side of the slider 3 in which the sliding state has deteriorated. In addition to stopping the slider, that is, stopping the lifting and lowering of the fifth wheel, the device may be damaged.

In addition, in the microfilm of Japanese Utility Model Application No. 51-14997 (Japanese Utility Model Application No. 52-108731), one upper end of one of two long legs rotatably crossed by a pin so as to constitute a pantograph type link mechanism. Is supported by a screw rod so as to be slidable in a long groove formed in the side wall of the lifting table, and a traverse wheel is supported by an axle through a short leg at the lower end of the long leg. Due to the above configuration, the laterally moving wheel of the invention shown in FIG. 2 only moves up and down in a vertical state, and therefore, even when the laterally moving wheel finishes its role and is stored upward, it does not become horizontal and remains vertical. Therefore, the ground clearance cannot be increased.

In view of the above, the present invention improves the method of transmitting the force for operating the lifting device for the fifth wheel from the actuator to the arm via the cross member while increasing the ground clearance when the fifth wheel for turning is stored. The purpose of the present invention is to smoothen the operation by sliding the cross member on the guide rail via the slider in a compliant manner.

<Means for Solving the Problems> In order to achieve the above object, the present invention slidably supports a cross member through a slider on a guide rail provided in the front and rear direction of the vehicle on the rear lower surface of the vehicle, A wheel carrier supporting a fifth wheel for turning is provided at the tip of an arm rotatably attached to a cross member, and one end of a turning link is used as a support member so as to turn in the front-rear direction of the vehicle while facing the arm. It is characterized in that the other end is attached to the wheel carrier and the rotary link is rotated by a drive gear mechanism to vertically move the fifth turning wheel from a horizontal state to a vertical state.

<Operation> In the lifting and lowering device for the fifth wheel for turning according to the present invention having the above-described structure, normally, the fifth wheel is placed substantially horizontally as shown in phantom in FIG. As shown in the figure, the vehicle 1 is slid at a parking place diagonally, and one side of the front and rear wheels, for example 14, 15 is braked by the braking device shown in FIG. Then, the worm 31 is used to move the rotation gear 29 in FIGS.
When it is rotated to the left in the figure, the rotation link 26 is rotated to the left, whereby the arm 5 supported by the cross member 4 sliding on the guide rails 2 and 2'through the slider 3 is rotated to the right. The carrier 7 is moved, the carrier 7 is rotated rightward and descends, and the fifth wheel 6 comes into contact with the ground. By further rotation of the rotating gear 29,
The fifth wheel 6 becomes almost vertical, but at this time, the rear portion of the automobile is lifted by the carrier 7, the rotation link 26 and the arm 5 to float the rear wheels 15, 15 '. At this time, most of the reaction force from the fifth wheel is received by the rotary link 26.

Here, by advancing the left front wheel 14 'of the automobile 1,
The rear part of the vehicle is rotated leftward by the fifth wheel 6 centering on the right front wheel 14 to complete the movement to the parking place.

Therefore, if the geared motor 30 is rotated in the reverse direction and the rotation gear 27 is rotated to the right in FIG. 1, the rotation link 26 causes the carrier to rotate.
27 rotates while turning to the right and rises, and the fifth wheel 6 becomes substantially horizontal as indicated by the phantom line in FIG. Rear wheel 15,15 '
Grounds.

<Embodiment> FIGS. 1 and 2 show the details of a fifth turning wheel lifting / lowering device 25 of the present invention. The same reference numerals as those in the conventional example indicate the same parts and members, and a description thereof will be omitted. Reference numeral 25 denotes a rotation link, one end of which is rotatably attached to the wheel carrier 7 by a pin 11, and the other end of which is attached to a support member, for example, a rotation shaft 28 supported by a bracket 27 on the vehicle body B.

A rotating gear 29 is fixed to the rotating shaft 28 outside the bracket 27, and a worm 31 of a geared motor 30 attached to the vehicle body B is meshed with the rotating gear 29.

Reference numerals 32 and 33 are limit switches provided on the lower limit position of the rotation link 26, and are electrically connected to control the geared motor 30.

FIGS. 4 to 6 show a fifth wheel lifting device for a vehicle equipped with a fifth wheel lifting device for turning according to the present invention.
The rear wheel is designed to easily lift the rear wheel of the automobile when the rear wheel is lifted by 25. As shown in FIG.
A shock absorber 37 provided near the bearing member 36 of the semi-trailing arm 35 and between the upper vehicle body B ', which is rotatably supported around the pin 34 in the rear part of the vehicle to support the 7 and 17'. It was done. A coil spring 38 is installed between the vehicle body B and the trailing arm 35.

As shown in detail in FIGS. 5 and 6, the shock absorber 37 is a piston in which a throttle hole 43 is formed near the lower end of a rod 42 which penetrates a rod guide 41 having a packing 40 provided at the upper end of a tube 39. 44 is fitted and a groove 44a formed on the same edge of the piston 44 is fitted into a rotation stopper 45 provided on the inner wall of the tube parallel to the axial center of the tube 39, and a threaded portion 42a is formed at the lower end of the rod 42. Then, the valve plate 46 is fitted into the threaded portion 42a, applied to the shoulder portion 42b of the rod 42, and non-rotatably fixed through the washer 47 by the nut 48 screwed together. Incidentally, 49 is a positioning ring of the piston 44 fixed to the rod guide 41.

The upper end of the rod 42 is a bearing 50 held by the upper body B '.
And is connected to a rod rotation motor 51.

As shown in FIG. 6, the rod rotation motor 51 rotates the valve plate 46 between the stoppers 52 and 53 to open or close the throttle hole 43, and at the time of opening, the normal shock absorber 37 is used. If the shock absorber 37 is activated and the length of the shock absorber 37 is fixed when it is closed and the rear part of the vehicle is raised, the rear wheels can be brought into the non-grounded state in a short time. In the lifting / lowering device for the fifth wheel for turning according to the present invention having the above-described structure, normally, the fifth wheel is placed substantially horizontally as shown by the phantom line in FIG.

In order to park here, the vehicle 1 is slanted into the parking place as shown in FIG. 10 and the braking device shown in FIG. 9 is used to brake one side of the front and rear wheels, for example 14, 15 as described above. When the shock absorber 37 shown in FIGS. 4 and 6 is provided, the valve plate 46 is rotated by the rod rotation motor 51 until it comes into contact with the stopper 53 via the rod 42, and the throttle hole 43 is closed. For example, the movement of the piston 44 of the shock absorber 37 is stopped, and the state in which the semi-trailing arm 35 is fixed to the upper vehicle body B'is maintained by the shock absorber 37.

After such a state, current is passed through the geared motor 30, and the worm 31 causes the turning gear 29 to move to the first position.
Turning to the left in the drawings and FIG. 2, the turning link 26 turns to the left, which causes the guide rail 2 and the guide rail 2 via the slider 3.
The arm 5 supported by the cross member 4 sliding on the 2'rotates to the right, the wheel carrier 7 rotates to the right and descends, and the fifth wheel 6 comes into contact with the ground. Further rotation of the turning gear 29 causes the fifth wheel 6 to become substantially vertical. At this time, the wheel carrier 7, the turning link 26, and the arm 5 raise the rear portion of the vehicle to set the rear wheels 15, 15 '. Float. At this time, most of the reaction force from the fifth wheel is received by the rotary link 26.

Here, by advancing the left front wheel 14 'of the automobile 1,
The rear part of the vehicle is rotated leftward by the fifth wheel 6 centering on the right front wheel 14 to complete the movement to the parking place.

Therefore, if the geared motor 30 is rotated in the reverse direction and the rotation gear 27 is rotated to the right in FIGS. 1 and 2, the carrier 27 is rotated to the right by the rotation link 26 and is lifted to the fifth wheel. 6 is the second
It becomes almost horizontal like the imaginary line. Rear wheel in the above climbing process
15 and 15 'are grounded.

Therefore, the function of the shock absorber 37 is restored by reversing the rod rotation motor 51 of the shock absorber 37 and rotating the valve plate 46 through the rod 42 until it comes into contact with the stopper 52 to open the throttle hole 43.

<Effects of the Invention> A fifth turning wheel lifting device according to the present invention slidably supports a cross member via a slider on a guide rail provided in the front-rear direction of the vehicle on the rear lower surface of the vehicle according to the present invention. A wheel carrier supporting a fifth wheel for turning is provided at the tip of an arm rotatably attached to the cross member, and one end of a turning link is supported so as to turn in the front-rear direction of the vehicle while facing the arm. It is characterized in that the other end is connected to the wheel carrier, the rotating link is rotated by a drive gear mechanism, and the fifth turning wheel is vertically moved from a horizontal state to a vertical state. , The fifth wheel for turning is almost horizontal at the time of the summit so that the ground clearance can be increased to be compactly accommodated, and it can be effectively operated as the vertical when turning, and the fifth wheel can be received after touching the ground. Most of the force is received by the rotary link, so that the slider can smoothly slide in the guide rail, and is caused by the left and right imbalance of the operating force when the fifth wheel is moved from the horizontal state to the vertical state as described above. The effect of smoothness between the slider and the guide rail and the non-smoothness of the movement due to the smoothness is eliminated, and the stopping and lifting of the fifth wheel and the damage to the device due to the above-mentioned non-smoothness are effectively prevented.

[Brief description of drawings]

FIG. 1 is a perspective view of a lifting and lowering device for a turning fifth wheel according to the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a lifting and lowering device for a turning fifth wheel according to the present invention attached to a rear part of an automobile. 4 is a front view of the rear suspension of the automobile, FIG. 5 is a schematic vertical cross-sectional view of the shock absorber, and FIG. 6 is A of FIG.
FIG. 7 is a perspective view of a conventional lifting and lowering device for the fifth wheel for turning, FIG. 8 is a front view of the same, and FIG. 9 is a fifth view for turning.
The top view which shows the braking device of the motor vehicle provided with the lifting device of a wheel,
FIG. 10 is a plan view showing a parking situation of the vehicle. 25 ; lifting device for turning fifth wheel of the present invention; 2, 2 '; guide rail, 3; slider, 4; cross member, 5; arm, 6; fifth wheel for turning, 7; wheel carrier, 26; Dynamic link, 28; rotating shaft, 29; rotating gear, 30; geared motor, 31; worm.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Mitsuo Iwahara 8 Fujisawa, Kanagawa Prefecture, Shelf Shelf, Isuzu Motors Co., Ltd. Fujisawa Plant (56) Bibliographic Reference Sho 52-108731 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A cross member is slidably supported by a guide rail provided in the front-rear direction of the vehicle on a rear lower surface of a vehicle through a slider, and is rotatably attached to an end of an arm rotatably attached to the cross member. While a wheel carrier supporting the fifth wheel is provided, one end of a rotation link is attached to a support member so as to rotate in the front-rear direction of the vehicle while facing the arm, and the other end is connected to the wheel carrier. 5. A lifting and lowering device for a fifth turning wheel, characterized in that the moving link is rotated by a drive gear mechanism to vertically move the fifth turning wheel from a horizontal state to a vertical state.