JPH0616112A - Raising and lowering device for vehicle turning fifth wheel - Google Patents

Abstract

PURPOSE:To provide a raising and lowering device for a vehicle turning fifth wheel by which a failure, such as causing oil leakage and so on if unnecessary force is applied to an actuator even when the fifth wheel is housed, can be eliminated and opration can be smoothed at the time. CONSTITUTION:A spring mechanism (coil springs 36 and torque spring) to suspend a raising and lowering device is engaged with raising and lowering member in a fifth wheel raising and lowering device to raise and lower the wheel 5 by means of an actuator 2 through the raising and lowering members (rotating arms 7, opration arms 3, support link 4 and so on), and opration can be smoothed when the raising and lowering device is oprated, and at the same time, even when the fifth wheel 5 is housed, weight of the raising and lowering device can be supported to a certain degree. Thereby, a failure such as causing oil leakage and so on if unnecessary force is applied to the actuator 2 can be eliminated, so that there is no possibility of constituting a hindrance to vehicle travel due to genenation of the so-called hanging-down phenomenon.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device for vertically moving a fifth wheel for turning a vehicle, which is provided on a lower surface of a vehicle, for laterally moving the vehicle mainly around front wheels.

[0002]

2. Description of the Related Art Ordinary so-called 2W for steering only front wheels
Since the S car is extremely inconvenient when parked in a narrow space, the present inventor has previously proposed Japanese Utility Model Application No. 2-406818. As shown in FIG. 8 and below, the invention of Japanese Patent Application No. Hei 2-406818 is an operation in which one end is supported by the vehicle body B and can be rotated by the actuator 2 on the rear lower surface of the front wheel drive type automobile 1 which can lock one of the front wheels. The other end of the arm 3 and the other end of the support link 4 which is rotatably supported on the vehicle body B at one end at a predetermined distance from the operating arm 3,
A wheel carrier 6 for horizontally rotatably supporting a fifth wheel for turning the vehicle during storage (hereinafter referred to as the fifth wheel) 5 is rotatably connected by pins 8 and 9 to both ends of an upstanding support arm 7. is there. An automobile equipped with the above device is preferably a so-called FF vehicle that drives front wheels. As shown in FIG. 12, for example, an engine 11 and a clutch 1 are provided on the axes of the front wheels 10 and 10 '.
2 and a transaxle 14 including a differential mechanism 13 are arranged in series, and are configured to transmit the power of the engine 11 to the front wheels 10, 10 'via these drive mechanisms. As shown in FIG. 10, the automobile 1 uses a diagonal split system as its service brake system, and one of the split master cylinders 16 operated by the brake pedal 15 is the right front wheel 1.
Zero brake 10a and left rear wheel 17 'brake 17'a
The brake pipe 18 'is connected to the other, and the other is the left front wheel
0'brake 10'a and right rear wheel 17 brake 17a
A brake pipe 18 is connected to the master cylinder 16, and the master cylinder 16 is provided with an electromagnetic check valve 19 of a braking device as disclosed in Japanese Patent Laid-Open No. 12360/1985. The brake fluid is confined in the ', and the brake 10a of the front wheel 10 and the brake 17'a of the left rear wheel 17' are locked. When the automobile 1 having the above configuration is going to be parked in a narrow space, this will be described with reference to FIG. 12. First, the front portion of the automobile 1 is slid diagonally from the rear to the place where the vehicle is to be parked, and the foot brake is applied. When the actuator 2 is operated, the operation arm 3 rotates counterclockwise (FIG. 9).
As a result, the support arm 7 of the carrier 6 is supported by the support link 4 at the other end thereof and is rotated in the clockwise direction to bring the fifth wheel 5 into contact with the ground, thereby raising the rear portion of the vehicle as shown in FIG.
At this time, the support arm 7 of the carrier 6 becomes horizontal, but the reaction force from the fifth wheel 5 causes the support link 4 and the operating arm 3 to move.
Can be received at. By moving the automobile 1 forward, the left front wheel 10 'rotates forward as described above, and the right front wheel 1'
The rear part of the car turns left by the fifth wheel 6 around 0,
The transfer to the parking place is completed. After parking is complete, apply the foot brake again, and then reverse the actuator 2,
In FIG. 9, when the operation arm 3 rotates clockwise in the opposite direction to the previous time, the carrier 6 rotates counterclockwise and rises to gradually stand upright, and the fifth wheel 5 becomes horizontal. Rear wheel 1 in the ascending process
7, 17 'are grounded. Here, one of the front wheels (for example, the right wheel 10) is unlocked, and the normal parking brake is applied. When exiting from the parking position, the brake is applied in the same manner as described above, and then the actuator 2 is operated, whereby the operation arm 3 rotates counterclockwise. As a result, the support arm 7 of the carrier 6 is supported by the support link 4 at the other end thereof and is rotated in the clockwise direction to bring the fifth wheel 5 into contact with the ground, thereby raising the rear portion of the vehicle as shown in FIG. As a result, the rear wheels 17, 17 'of the automobile float, so that one of the front wheels (for example, the right wheel 10) is locked in the same braking state as described above and the brake 10'a on the other side 10' is released to release the automobile 1 When the vehicle is moved backward, the other of the front wheels 10 'is rotated rearward by the differential mechanism 13, and accordingly, the vehicle 1 is rotated in the opposite direction by the fifth wheel 6 about one of the front wheels 10 to rotate the vehicle. Escape the rear from the parking position. Here, if the brake is applied again and the actuator 2 is operated in the opposite direction to the above, the support link 4 is rotated upward to cause the carrier 6 to move the fifth wheel 5 from the vertical state to the horizontal state. As a result, the rear wheels 17, 17 'of the vehicle land, so the brakes and brake locks can be released, the vehicle can be moved backward as usual, and then moved forward. With the above configuration, parking becomes much easier than before, and
If the function originally possessed by the car is utilized, it is not necessary to provide a special drive mechanism for operating the fifth wheel, the mechanism is simple and the cost is low, the weight is reduced, and there is a problem in weight balance. It has the effect of not occurring.

[0003]

However, in the turning fifth wheel lifting device according to the invention of Japanese Patent Application No. 2-406818, the actuator 2 rotates the base end of the working arm 3 to move the fifth wheel. Since the wheel 2 is moved up and down and the state is maintained by the actuator 2 even after the fifth wheel is lifted (stored), the actuator 2 is provided with the fifth wheel 5, the wheel carrier 6, the support link 4, Part or all of the weight of the lifting member such as the support arm 7 is applied. As a result, particularly when the actuator 2 uses hydraulic pressure, oil leakage occurs and the posture of the lifting device such as the fifth wheel 5, the wheel carrier 6, the support link 4, the support arm 7 and the like collapses, causing a so-called drooping phenomenon. This may occur and may hinder the running of the vehicle. In view of the above, the present invention eliminates the above-mentioned problem in the lifting device for the fifth wheel, that is, the problem that unnecessary force is applied to the actuator even when the fifth wheel is housed to cause oil leakage, and at the same time, smooth operation is achieved. The present invention was devised for the purpose of providing a lifting device for the fifth wheel for turning a vehicle.

[0004]

A fifth wheel lifting device for turning a vehicle according to the present invention for achieving the above object is a fifth wheel lifting device for lifting and lowering a fifth wheel by an actuator through a lifting member. A first invention characterized in that a spring mechanism for suspending the elevating device is engaged with the elevating member, and an actuator in which a wheel carrier for supporting a fifth wheel is supported by a vehicle body at one end through a rotating arm. Is rotatably supported by an actuating arm that can be swung by the vehicle and a support link that is once rotatably supported by the vehicle body at a predetermined distance from the operating arm, and a coil spring is suspended between the wheel carrier and the vehicle body. A second invention characterized in that
A wheel carrier that supports the fifth wheel is supported by a vehicle body, one end of which is supported by a vehicle body through a rotating arm and can be rotated by an actuator, and a support body which is once rotatably supported by the vehicle body at a predetermined distance from the operating arm. A third invention is characterized in that a torque spring that rotatably supports the link by means of a link, and a torque spring that always biases the support link upward is interposed in a support portion of the support link to the vehicle body.

[0005]

[Operation] In the lifting device for the fifth wheel for vehicle turning according to the present invention having the above-mentioned configuration, normally, the fifth wheel is placed horizontally, and at this time, the actuator is provided with the weight of the fifth wheel and the lifting member. However, since this force is suspended by the spring mechanism that engages with the elevating member, the force applied to the actuator is reduced, and the occurrence of problems such as oil leakage is avoided. The actuator is operated to park the automobile 1, and the operating arm is rotated counterclockwise to rotate the support arm of the carrier at the other end of the support link to the support link and rotate clockwise to ground the fifth wheel. In the process of raising the rear portion of the vehicle by the above, the spring mechanism supports the weight of the lifting device to some extent and smoothes the operation thereof. At this time, the spring mechanism is once largely bent, but when the fifth wheel is substantially upright and the support arm is substantially horizontal, the spring mechanism returns to its original state, and the spring reaction force does not increase further. After parking is completed, the actuator is reversely operated, and the operating arm is rotated in the clockwise direction in the opposite direction to the previous one, so that the support arm gradually stands upright, whereby the fifth wheel becomes horizontal and the rear wheel comes into contact with the ground. In this case as well, the spring mechanism supports the weight of the lifting device to some extent, so that the operation thereof is smooth.

[0006]

1 to 7 show an embodiment of a lifting and lowering device for a fifth wheel for turning according to the present invention. The device is arranged in a rear trunk compartment of a vehicle, for example, a passenger car or below it. The typical structure is shown in FIGS.
It is similar to the invention of No. 18. That is, 4 is a support link,
A single pipe 21 is bent into a half-frame shape, both ends thereof are bent at an acute angle, and a triangular connecting piece 22 is welded to the bending point 21a. The upper end 21b of the pipe 21 is connected to the vehicle body through a bearing 23. It is rotatably supported by B. Incidentally, 24 is a reinforcing member. Numerals 3 and 3 are actuating arms that form a pair of left and right sides and are connected by a connecting bar 3a to form a half-frame shape.
The brackets 26 and 26 are rotatably supported by the vehicle body B with a distance of about 2 mm between them. Reference numeral 2 denotes an actuator, which is supported by the bracket 26 near one end of one of the actuating arms 3, and the actuator 2 receives hydraulic pressure from a piston 28 in a hydraulic cylinder 27, for example, as shown in FIG. By moving the rod 29
The gear 31 that meshes with the rack 30 attached to the rack is rotated, and the operating arms 3 can be rotated via a shaft 32 to which the gear 31 is fixed. Reference numeral 6 denotes a wheel carrier. The support arms 7 and 7 are attached to both ends of the thick round pipe 33 at right angles to the same by welding or the like, and the mounting portion 34 of the fifth wheel 5 is provided at the center of the thick round pipe 33. It is provided, and the upper surface of the fifth wheel mounting portion 34 is formed so that the longitudinal directions of the support arms 7, 7 are orthogonal to each other. The entire length of the wheel carrier 6 is substantially the same as the inner method of the half frame of the support link 4 and the operating arms 3 and 3. The other ends (tips) of the operating arms 3 and 3 are connected to the upper ends of the support arms 7 and 7 of the wheel carrier 6 by pins 8, and the left and right connecting pieces 22 of the support link 4 are connected to the support arm 7. By connecting the fifth wheel 5 to the fifth wheel mounting portion 34 of the wheel carrier 6 rotatably by connecting it to the vicinity of the lower end of the vehicle by the pin 9, the basics of the lifting device for the fifth wheel for vehicle turning of the present invention can be obtained. Composed. The fifth wheel 5 has a wheel hub mounted on a spindle (not shown) that can be fixed to the mounting portion 34 of the wheel carrier 6 via a bearing, and a brake device has a screw inside the hub like a normal wheel. The spare tire T, which is a wheel for turning, is fixed to the wheel pin outside the wheel hub, and is fixed to the wheel pin by a wheel nut. In addition to the basic structure described above, a fifth wheel lifting / lowering device according to the present invention is a spring mechanism for suspending the lifting / lowering device on the lifting members such as the wheel carrier 6, the support link 4, and the support arm 7 when the fifth wheel is lifted. Is engaged,
1 to 5, the pins 9 of the support arms 7 and 7 are formed to be long, and the pins 35 are fixed to the vehicle body B almost directly above the shaft 32 of the actuator 2, and the pins 9 and Coil spring 36 between pin 35
It has been multiplied by. In addition, as shown in FIGS. 6 and 7,
The space between the bearings 23, 23 on the upper end 21b of the support link 4 is replaced with a torque spring 37. The torque spring 37 has its center fixed by a rotation restricting bearing 38 and, for example, within the bearings 23, 23. It is connected to the upper end 21b of the support link 4. With the fifth wheel lifting device according to the present invention having the above-described structure, the support link 4 is directed toward the front of the vehicle, and as shown in FIGS. 1 and 6, the device is rotated by a certain angle with respect to the center line CL of the device. Line L
The bearings 23, 23 and the brackets 26, 26 are used by fixing the bearings 23, 23 and the brackets 26, 26 to the vehicle body B by aligning (or L ', which is offset from this) with the vehicle center line. In the lifting and lowering device for the fifth wheel for turning according to the present invention having the above-described structure, the fifth wheel 5 is normally placed horizontally as shown in FIGS. 2, 4, 5 or 6 and 7.
At this time, the actuator 2 tries to bear the weight of the lifting member including the fifth wheel 5, the wheel carrier 6, the support link 4, the support arms 7, 7, etc., but this force is applied to the support arms 7, 7 or the support members 7. Since it is suspended by the coil spring 36 or the torque spring 37 that engages with the link 4, the force applied to the actuator 2 is reduced, and the occurrence of problems such as the oil leak is avoided. In order to park here, as shown in FIG. 12, the automobile 1 is slid diagonally into the parking place, and one of the front and rear wheels is braked and locked by the braking device of FIG. 10 as described above. The piston 28 in the cylinder 27 moves, and the rack 30 rotates the gear 31 meshing with the piston 28.
The actuating arms 3 and 3 rotate counterclockwise via 2.
This causes the support arms 6 and 6 of the carrier 6 to rotate in the clockwise direction with the other end being supported by the support link 4, and eventually the fifth wheel 5 contacts the lower surface in a tilted state, centering on the grounded lower surface. After getting up, the fifth wheel 5 becomes almost vertical. As a result, the rear part of the vehicle is raised as shown in FIG. In the descending process, the coil spring 39 or the torque spring 40 supports the weight of the elevating device to some extent to facilitate the operation thereof. At this time, the spring mechanism such as the coil spring 39 or the torque spring 40 is once largely bent (for example, as shown in FIG. 5 for the coil spring 369), the fifth wheel 5
Is almost upright and is in the original state when the support arms 7, 7 are substantially horizontal, and the reaction force of the spring does not increase further. Here, by moving the vehicle 1 forward, the left front wheel 10 'rotates forward as described above, and the rear part of the vehicle rotates left by the fifth wheel 6 centering on the right front wheel 10 to complete the movement to the parking place. To do. Therefore, when the actuator 2 is operated in reverse and the operating arms 3 in FIG. 5 rotate in the clockwise direction in the opposite direction to the previous time, the carrier 6 rotates in the counterclockwise direction and rises, so that the support arms 7, 7 move. Gradually erect, the fifth wheel 5 becomes horizontal as shown in FIG. 5, and the rear wheels 17, 17 'are in contact with the ground. During this ascending process, the spring mechanism such as the coil spring 36 or the torque spring 37 supports the weight of the lifting device to some extent, so that the operation thereof becomes smooth.

[0007]

The fifth wheel lifting device for turning a vehicle according to the present invention includes: a lifting member for a fifth wheel lifting device for lifting a fifth wheel by an actuator.
A first invention in which a spring mechanism for suspending the elevating device is engaged, and an operation arm which has a wheel carrier supporting the fifth wheel supported at one end by a vehicle body via a rotating arm and can be rotated by an actuator, A second feature is that the operating arm is rotatably supported by a support link that is rotatably supported on the vehicle body at a predetermined distance from the operating arm, and a coil spring is suspended between the wheel carrier and the vehicle body. Invention,
A wheel carrier that supports the fifth wheel is supported by a vehicle body, one end of which is supported by a vehicle body through a rotating arm and can be rotated by an actuator, and a support body which is once rotatably supported by the vehicle body at a predetermined distance from the operating arm. The third invention is characterized in that a torque spring that rotatably supports the link by means of a link and a torque spring that always biases the support link upward is interposed in a support portion of the support link to the vehicle body. At the same time as smoothing the operation of the lifting device when operating,
By supporting the weight of the lifting device to some extent even when the wheels are stowed, there is no problem that unnecessary force is applied to the actuator to cause oil leaks, etc., so that the so-called drooping phenomenon occurs and the running of the vehicle is disturbed. There is no fear of coming. Further, in addition to the above effects, the second invention has an effect that the coil spring can be easily installed,
The third aspect of the invention has the effect of requiring a small space.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of a turning fifth wheel lifting device according to the present invention;

FIG. 2 is a side view of the same,

FIG. 3 is a partial cross-sectional side view showing the vicinity of the actuator,

FIG. 4 is a perspective view of the same.

FIG. 5 is an explanatory view of the same operation,

FIG. 6 is a plan view of another embodiment of the lifting and lowering device for the fifth wheel for turning according to the present invention;

FIG. 7 is a perspective view of the same,

FIG. 8 is a perspective view of a conventional lifting device for a fifth wheel for turning,

FIG. 9 is a front view of the same.

FIG. 10 is a plan view showing a braking device of an automobile equipped with a lifting device for the fifth wheel for turning,

FIG. 11 is a side view showing a parking situation of the vehicle,

FIG. 12 is an operational plan view of an automobile parked using the lifting and lowering device for the fifth wheel for turning. 2; Actuator, 3, 3; Actuating arm, 4; Support link, 5; 5th wheel, 6; Wheel carrier, 7, 7; Support arm, 8, 9, 35; Pin, 23; Bearing, 34; 5th Wheel mounting portion, 36; coil spring, 37; torque spring, 38: rotation restriction bearing.

Claims (3)

[Claims] 1. A vehicle turning characterized in that a spring mechanism for suspending the lifting device is engaged with the lifting member of a fifth wheel lifting device for lifting and lowering the fifth wheel by an actuator through the lifting member. 5th wheel lifting device. 2. An operating arm, one end of which is supported by a vehicle body via a rotating arm and which can be rotated by an actuator, and a wheel carrier which supports a fifth wheel and which is temporarily rotated by a predetermined distance from the operating arm. A fifth wheel raising / lowering device for turning a vehicle, which is rotatably supported by a support link that is freely supported, and has a coil spring suspended between the wheel carrier and the vehicle body. 3. An operating arm, one end of which is supported by a vehicle body via a rotating arm and which can be rotated by an actuator, and a wheel carrier which supports a fifth wheel, and which is once rotated to the vehicle body at a predetermined distance from the operating arm. A vehicle turning vehicle which is rotatably supported by a support link which is freely supported, and a torque spring which always urges the support link upward is interposed in a support portion of the support link to the vehicle body. 5
Wheel lifting device.