JPH0782741A - Car with body tilting movement prevention device - Google Patents

Abstract

PURPOSE:To promote safety of operation by pushing a buffer spring provided between a frame and a wheel with a spring pushing device, bearing the buffer spring on a fixed position against the frame, and suppressing a spring bearing device between the buffer spring and pushing device to hold. CONSTITUTION:An interlocking arm 33 is tumed by a control lever 39 of a tilting movement prevention device A at a site, and it is interlocked with a bearing member pin 322 corresonding thereto. A piston rod 312 of a piston cylinder device 31 is projected, a spring 20 is pushed downward from above. Under such a state, a driving machine B is turned, a hammer bearing rail section 43 is raised, and a guard rail post is driven in the ground by a hammer 44. During the driving operation, the buffer spring 20 of a car C is held from up and down between a piston cylinder device 31 and a spring bearing member 32 and, at the same time, it is maintained in a fixed position against a body frame 18, and an attitude of the hammer 44 also poses substantially a regular attitude to carry out smoothly driving work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle with a vehicle body tilt prevention device.

[0002]

2. Description of the Related Art Various piles, vehicles equipped with pile or columnar driving devices such as guardrail stanchions, ground excavation for drilling wells, foundation pile holes for construction civil works, blast holes at mining, quarrying and civil engineering sites. For vehicles equipped with on-site work equipment, such as vehicles equipped with boring machines for excavating
It is often the case that a part of a field work machine such as a boring machine is projected to any part of the vehicle body or is operated outside the vehicle body. When used in this way, a biased load or moment is applied to the vehicle. In this case, the vehicle usually has a cushioning spring interposed between the vehicle body frame and the wheel portion, so that the spring bends or expands or contracts due to the biased load or moment to tilt the vehicle body. It hinders smooth driving work and boring work.

Further, not only in the case of the vehicle equipped with the on-site work machine described above, but also in the case of a vehicle for carrying a heavy object, when the vehicle is loaded or unloaded, an unbalanced load or moment may act to tilt the vehicle body. Therefore, a means for preventing such tilting of the vehicle body has been conventionally adopted, which is an extendable and retractable support device made up of a normal piston cylinder device mounted on a vehicle body frame. Lift and support so that there is no spring effect. In extreme cases, the vehicle body is lifted and supported together with the wheels.

[0004]

However, such a conventional supporting device is extremely large-scaled, the equipment cost is high, the whole vehicle is bulky, and the degree of freedom in moving the vehicle is reduced. In addition, the support device extends from the portion other than the wheels toward the ground, which is dangerous and requires sufficient caution in operation.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a vehicle equipped with a vehicle body tilting preventive device which is relatively inexpensive and can be installed relatively inexpensively without causing an increase in the size and bulk of the vehicle.

[0006]

A vehicle according to the present invention for solving the above-mentioned problems includes a shock-absorbing spring which is connected to a vehicle body frame and wheel portions and is interposed between the frame and the wheel portions. Spring pressing means that can press downward from above with the frame as a support, and the cushioning spring that is pressed by the spring pressing means are supported at a fixed position with respect to the frame from below by using the frame as a support, and the pressing means It is characterized in that it has a vehicle body tilting prevention device provided with a spring support means that can be clamped and pinched between the two.

The spring pressing means presses the spring by rotating and lowering a screw rod screwed into a female screw portion supported by the frame, and a link mechanism combining a rod-shaped member and the like. Various pressing means are conceivable, such as those consisting of. From the viewpoints of ease of mounting, simplification of structure, easiness of operation, etc., it is conceivable to employ a piston cylinder device supported by the frame and capable of pressing the spring as a typical example.

As the spring supporting means, various spring supporting means such as one utilizing a piston cylinder device, one comprising a link mechanism combining rod-shaped members and the like can be considered. In terms of ease of mounting, simplification of structure, easiness of operation, etc., as a typical example, a spring support member including an engaged portion such as an engaged pin installed under the spring, and There may be mentioned a spring supporting means including an engaging arm that can be selectively connected to a frame and engaged with the spring supporting member or separated from the spring supporting member. In this case, as a method of installing the spring support member under the spring, the spring support member may be installed so as to be in direct contact with the spring, or may be installed around another member, for example, the rear wheel drive shaft extending from the differential gear device casing. You may install so that it may support via the cover frame.

Further, it is considered that the vehicle is equipped with a field work machine in advance or not.

[0010]

According to the vehicle of the present invention, the spring pressing means in the vehicle body tilting prevention device presses the cushioning spring interposed between the vehicle body frame and the wheel portion from the upper side to the lower side, and the spring is pressed. The spring supporting means supports the body frame from below at a fixed position and holds and clamps it with the pressing means, whereby the operation of the spring is sealed and the spring is supported even when an unbalanced load or moment acts on the vehicle body. Does not bend or expand or contract, and tilting of the vehicle body due to bending or expansion and contraction of the spring is prevented.

When a piston cylinder device supported by the vehicle body frame and capable of pressing the buffer spring is adopted as the spring pressing means, the spring can be pressed downward from above by extending the piston cylinder device. As the spring supporting means, a spring supporting member installed below the buffer spring and a position connected to the vehicle body frame and engaged with the spring supporting member or a position separated from the spring supporting member can be selectively set. When adopting the one including a possible engagement arm, by engaging the engagement arm with the spring support member,
The spring can be supported at a fixed position from below on the vehicle body frame and can be sandwiched between the spring and the spring pressing means.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a self-propellable vehicle C equipped with a vehicle body tilt prevention device A and a guardrail strut driving-in device B, which is an example of a field work machine, with the left rear wheel omitted. . FIG. 2 is a schematic cross-sectional view taken along the line XX of FIG. 1, and shows the driving tool B in a state in which it is turned to the working position. FIG. 3 is a side view of the vehicle during the work of driving the guardrail prop, in which the left rear wheel is omitted.

The vehicle C shown in the figure has a driver's seat portion 11, a pair of front wheels 12 and 12 therebelow, and a loading platform 13 continuing to the driver's seat portion 11.
And a pair of rear wheels 14 and 14 thereunder. The rear wheels 14, 14 are connected to rear wheel drive shafts 141, 141 extending in the left-right direction from a differential gear unit 15 below the center of the luggage carrier 13. The differential gear unit 15 is connected to a drive shaft 161 extending from the engine unit 16. Cylindrical cover frames 17, 17 surrounding the rear wheel drive shafts 141, 141 extend from the differential gear device 15 to the left and right, and the rear wheel 14,
14 and those parts associated therewith form the rear wheel part of the vehicle. Although not shown in the figure, a rear wheel shock absorber and the like are also provided.

The carrier frame 18 of the vehicle body frame 18
A pair of buffer springs 20, 20 each of which is formed by stacking a plurality of leaf springs is arranged in the first portion. Buffer spring 2
Numerals 0 and 20 are arranged above the rear wheel drive shaft cover frames 17 and 17 extending from the differential gear device 15 to the left and right, both ends thereof are connected to the luggage carrier frame 181, and the central portion includes U bolts arranged in front and rear of the cover frame. Fasteners 21, 2
It is connected to the cover frame at 1. In this way, the pair of buffer springs 20, 20 are interposed between the vehicle body frame 18 and the rear wheel portion, so that the impact received from the unevenness of the road or the like while the wheels are traveling is mitigated. In addition, although not shown in the figure, a shock absorber is also provided for the front wheels 12, 12.

The vehicle structure and operation described above are the same as those in the conventional vehicle. The vehicle body tilting prevention device A includes a hydraulically operated piston cylinder device 31 arranged for each buffer spring 20, and a support member 32 applied to the lower surface of the frame at the connection position of each buffer spring 20 to the cover frame 17. , And an engaging arm 33 provided for each support member 32.

The cylinder portion 311 of each piston-cylinder device 31 is supported by the carrier frame 181, and the piston rod 312 is directed toward the upper surface of the central portion of the buffer spring 20. Each support member 32 includes a plate-shaped portion 321 applied to the lower surface of the cover frame 17 and a pin 3 protruding from the portion.
It consists of 22 and. The plate-shaped portion 321 is applied to and supported by the frame 17 by the fastener 21 that fastens the spring 20 to the cover frame 17. Pin 322
Is facing sideways with respect to the traveling direction of the vehicle.

Each engaging arm 33 has a claw portion 331 which engages and disengages with a pin at the lower end, and has a generally L-shape as a whole.
The upper end is rotatably pin-connected to the luggage carrier frame 181, so that the position P1 separated from the pin 322 (see FIG. 1) or the position P2 engaged with the pin (see FIG. 3) can be taken. The left and right engagement arms 33, 33 are operated by a manual operation mechanism 34. The operating mechanism 34 includes a lateral connecting rod 35 that connects intermediate portions of the arms 33, 33 so that the arms 33 and 33 interlock in the same direction, and a rear end of the vehicle is rotatably connected to the connecting rod 35. The connecting rod 36 extending in the direction, the middle portion of the connecting rod 36 is rotatably pin-connected to the carrier frame 181, and the lower end thereof is rotatably connected to the front end of the connecting rod 36, and the rear end thereof is the rotating rod. A connecting rod 38 rotatably connected to the upper end of 37 extends in the vehicle traveling direction, an intermediate portion is rotatably connected to and supported by the carrier frame 181, and a lower end thereof is rotatably connected to the front end of the connecting rod 38. It is composed of an operating lever 39. Operating lever 3
9 projects to the upper side of the loading platform 13.

The operating lever 39 of the operating mechanism 34 is shown in FIG.
As shown in FIG. 4, when the arm 3 is turned down in the direction of the arrow a and tilted down, the engagement arms 3
3 rotates counterclockwise in FIG. 3 to take the engagement position P2,
The claw portion 331 of the arm engages with the lower surface of the engaged pin 322 of the corresponding support member 32. Thus, each spring 20 is supported from below via the cover hood 17 and in a fixed position relative to the body frame 18. When the piston rod 312 of each hydraulic piston cylinder device 31 is projected in this supporting state, the spring is pressed downward from above, and is clamped and clamped between the supporting member 32 and the cover frame 17. To be sealed. When the operating lever 39 is rotated and tilted in the direction opposite to the direction of the arrow a, each engagement arm 33 takes the disengagement position P1 shown in FIG.

The guardrail strut driver B is already known per se, and is mounted on the luggage carrier 13. The driving tool B includes a hydraulic circuit, an air circuit, and the like, and a main body 41 that can be swung on the platform 13 by a drive mechanism (not shown), a horizontal arm 42 that swivels together with the main body 41,
A hammer support rail portion 43 whose lower end portion is rotatably connected to a tip end portion of an arm 42, an air hammer 44 movably attached to the rail portion along the rail portion, and a rail portion 43 mounted on the rail portion 43. A hydraulic piston / cylinder device 45 for raising the hammer moving part 441 for adjusting the position on the parts, the rail part 43 and the air hammer 44 supported by the rail moving parts 441 to the driving position shown by the two-dot chain line in FIG. 2 and the solid line in FIG. Contains. The piston cylinder device 45 and the hydraulic piston cylinder device 31 in the tilt prevention device A described above are supplied with hydraulic oil from the main body 41 of the device B. Further, the compressed air is supplied to the air hammer 44 from the main body 41.

In the vehicle C described above, the piston rod 31 of the piston cylinder device 31 in the tilt prevention device A is used.
2 is moved up and down, each engaging arm 33 is detached from the corresponding support member pin 322, and the driving tool B is self-propelled to the guardrail support driving site in the state shown in FIG. At the site, each of the engagement arms 33 is moved to the position P by operating the operation lever 39 of the tilt prevention device A.
It is rotated from 1 to P2 and engaged with the corresponding support member pin 322. Further, the piston rod 312 of each piston cylinder device 31 is projected to press the central portion of each spring 20 downward from above. In this way, each spring 20 is held from above and below to be sandwiched and its operation is closed. In this state, the driving tool B is swiveled toward the guardrail support pillar driving position as shown in FIG. 2, the hammer support rail portion 43 is raised, and the guardrail support pillar G is driven into the ground by the hammer 44 as shown in FIG.

During this driving operation, each buffer spring 20 of the vehicle C is clamped from above and below by the piston cylinder device 31 and the spring supporting member 32, and is maintained in a fixed position with respect to the vehicle body frame 18 so that its operation is blocked. Therefore, the hammer support rail portion 43 and the hammer 44 are
Despite protruding to one side of the spring, the springs 20, 2
It is possible to prevent the vehicle body from tilting due to bending of 0, maintain the vehicle body posture in a substantially initial state, and allow the hammer 44 to take a substantially regular posture, so that a smooth driving operation can be performed.

The vehicle body tilting prevention device A described above
Can be applied to a vehicle equipped with a field work machine other than the guardrail prop driving machine B, and can also be applied to a vehicle not equipped with a field work machine.

[0023]

According to the present invention, it is possible to provide a vehicle equipped with a vehicle body tilting preventive device that is relatively inexpensive and can be equipped relatively inexpensively without causing the vehicle to become large and bulky. As a spring pressing means that constitutes the vehicle body tilt prevention device,
When the piston-cylinder device supported by the vehicle body frame and capable of pressing the buffer spring is adopted, the spring pressing means can be attached to the vehicle body relatively easily, and the structure of the means is simplified, and the operation thereof is simplified. Will also be easier.

Further, as spring support means constituting the vehicle body tilting prevention device, a spring support member installed below the buffer spring and a position connected to the vehicle body frame and engaged with the spring support member or the spring support member. When the engagement arm that can selectively take the position separated from the member is included, the spring support means can be attached to the vehicle body relatively easily, and the structure of the means can be simplified. The operation is also easy.

When the vehicle is equipped with a field work implement,
The vehicle body tilt preventive device prevents the vehicle body from tilting and enables smooth field work.

[Brief description of drawings]

FIG. 1 is a side view of a vehicle according to an embodiment of the present invention, in which a left rear wheel is omitted.

FIG. 2 is a schematic cross-sectional view taken along the line XX of FIG. 1, showing the guardrail strut driving machine in a state of being swung to a working position.

FIG. 3 is a side view of the vehicle during the operation of driving the guardrail prop, in which the left rear wheel is omitted.

[Explanation of symbols]

 A Body Tilt Prevention Device 31 Piston Cylinder Device 311 Cylinder Part of Device 31 312 Piston Rod of Device 31 32 Spring Supporting Member 321 Plate Part of Member 32 322 Engaged Pin of Member 32 33 Engaging Arm 34 Engaging Arm Operating Mechanism 39 Operation lever B Guide rail prop driving machine C Vehicle 11 Driver's seat 12 Front wheel 13 Rear bed 14 Rear wheel 141 Rear wheel drive shaft 15 Actuating gear unit 17 Rear wheel drive shaft 141 cover frame 18 Body frame 181 Frame frame part of frame 18

Claims (4)

[Claims] 1. Spring pressing means which is connected to a vehicle body frame, and which is connected to a wheel portion and is capable of pressing a cushioning spring interposed between the frame portion and the wheel portion downward from above with the frame as a support. A vehicle body tilting device that includes spring supporting means for supporting the buffer spring pressed by the spring pressing means from below on the frame in a fixed position with respect to the frame, and holding and clamping the buffer spring with the pressing means. A vehicle with a vehicle body tilting prevention device characterized by having a prevention device. 2. The vehicle according to claim 1, wherein the spring pressing means is a piston cylinder device which is supported by the frame and can press the spring. 3. The spring supporting means selectively selects a spring supporting member installed below the spring and a position connected to the frame and engaged with the spring supporting member or a position separated from the spring supporting member. A vehicle as claimed in claim 1 or 2 including an engagement arm which can be fitted to the vehicle. 4. The vehicle according to claim 1, 2 or 3, wherein the vehicle is a vehicle equipped with a field work machine.