JPH07277226A - Driving vehicle - Google Patents

Abstract

PURPOSE:To provide a four-wheel hydraulic driving vehicle which can easily visibly recognize the ground part of a front wheel or the state of a road surface near its front. CONSTITUTION:Suspension systems 3, 4 are provided in the front and rear parts of a vehicle 1, and a front and a rear wheel 12,14 equipped with hydraulic motors 13, 15 are attached to the suspension devices 3, 4. The front and rear wheels 12, 14 are ascendably provided through the suspension devices 3, 4. In addition, an opening part 28 passing through a wheel house 26 and a driver's room 21 is formed in an inner frame 2a to partition the driver's room 21 formed in the vehicle 1 and a front wheel house 26 for accommodating the front wheel 12. A transparent plate 29 is detachably provided in the opening part 28, and a through-vision-type window 30 is formed of the opening part 28 and the transparent plate 29. In this case, a driver in the driver's room 21 can visibly recognize a section near the ground part of the front wheel or the state of its front road surface through the through-vision-type window 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive vehicle, and more particularly, to a drive vehicle in which front wheels and rear wheels can be independently raised and lowered according to road conditions.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Utility Model Laid-Open No. 3-83137 proposes a technique for visually recognizing a road surface condition in front of a vehicle by using a mirror. In this system, a mirror is attached to the outside of the front panel of the vehicle body so that the driver can visually recognize the road surface condition in front of the vehicle through the mirror from the driver's seat.

Similarly, in Japanese Utility Model Laid-Open No. 54-158737, the weeding tools and the weeding condition located at the front of the combine are visually recognized through a mirror attached to the upper part of the raising device. Techniques for doing so are disclosed.

[0004]

However, as described above, in the method of securing the visibility of the road surface condition in front of the vehicle by attaching the mirror to the outside of the front part of the vehicle body, the driver can confirm the road surface condition etc. It is necessary to adjust the mirror for visual recognition, and the adjustment work is troublesome and difficult because the driver gets off the vehicle, for example.

Further, since the mirror is provided in the front part of the vehicle body, it is difficult to visually recognize the vicinity of the grounding part between the road surface and the driving parts such as the front wheels and tracks which are located on the left and right sides of the vehicle body. There is.

The present invention has been made in order to solve the above problems, and an object thereof is to provide a drive vehicle in which the road surface condition or the like in front of the ground contact portion of the front wheel or near the front thereof can be easily visually recognized. Especially.

[0007]

In order to solve the above problems, the invention according to claim 1 provides a front wheel and a rear wheel in which a suspension device is provided at a front portion and a rear portion of a vehicle, and the suspension device is provided with drive means. In the drive vehicle in which the front wheels and the rear wheels can be moved up and down by mounting, the window is formed in the inner frame that divides the driver's cab formed in the vehicle and the wheel house that houses the front wheels. What is done is the summary.

According to a second aspect of the invention, the gist of the invention of the first aspect is that a transparent plate is provided in the window portion. According to the invention of claim 3, in the invention of claim 2, the gist is that the transparent plate is provided so as to be detachable from the window portion.

[0009]

Therefore, according to the first aspect of the present invention, the vehicle runs while the front and rear wheels are rotated by the drive of the drive means.
When the vehicle is traveling, the front and rear wheels are lifted and lowered according to the road surface condition by the suspension devices provided at the front and rear portions of the vehicle, and the vehicle is always held substantially horizontally. At this time, the driver who drives the vehicle in the driver's cab can visually recognize the road surface condition near the front ground contact portion of the front wheel or near the front thereof through the window.

According to the second aspect of the present invention, since the transparent plate is disposed in the window portion, it is possible to prevent dirt, stones, or the like from entering the driver's cab from the road surface or the like. According to the invention of claim 3, the work such as the removal or replacement of the transparent plate can be easily performed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a hydraulic four-wheel drive vehicle in which four driving wheels are independently supported so as to be able to move up and down will be described with reference to FIGS.

As shown in FIGS. 1 to 3, a pair of left and right front suspensions 3 are provided on the front side of a body frame 2 of a hydraulic four-wheel drive vehicle (hereinafter, simply referred to as a vehicle) 1, and a pair of left and right front suspensions 3 are provided on the rear side. A rear suspension device 4 is provided. The front suspension device 3 is arranged to extend slightly obliquely downward, and the rear suspension device 4 is arranged to extend vertically. Each suspension device 3 and 4 comprises an outer cylinder 5, an inner cylinder 6 and a hydraulic cylinder 7 (only shown in FIG. 4). The outer cylinder 5 of the front suspension device 3 is rotatably supported by the vehicle body frame 2 via bearings 10 and 11. The outer cylinder 5 of the rear suspension device 4 is non-rotatably supported by the body frame 2. The inner cylinder 6 of each suspension device 3, 4 is, for example, via a ball spline,
It is configured such that it cannot rotate with respect to the outer cylinder 5 and can move in the axial direction. The support brackets 8 and 9 are fixed to the lower ends of the inner cylinders 6.

A front wheel 12 and a hydraulic motor 13 for driving the front wheel 12 are supported on the support bracket 8.
A rear wheel 14 and a hydraulic motor 15 that drives the rear wheel 14 are supported by the support bracket 9. Front and rear wheels 1
Reference numerals 2 and 14 are connected to the drive shafts of the hydraulic motors 13 and 15 so as to rotate integrally with each other. That is, each of the four front and rear wheels 12, 14 disposed on the front, rear, left, and right of the vehicle 1 is provided with the hydraulic motors 13, 15, respectively, and rotates according to the drive of the hydraulic motors 13, 15.

FIG. 4 is a schematic view showing the structure of the hydraulic cylinder 7. As shown in FIG. 4, the hydraulic cylinder 7 is the inner cylinder 6
The cylinder body 16 is fixed inside. The tip of a piston rod 17 is fixed to the outer cylinder 5, and the piston rod 17 is slidably inserted into the cylinder body 16.
A piston 7a disposed inside the cylinder body 16 is fixed to the base end thereof. The piston rod 17 is the outer tube 17
a and an inner tube 17b to form a double tube structure, and the outer tube 1
A through hole 17c is provided on the outer periphery of 7a. Outer tube 1
7a communicates with the chamber 16a above the piston 7a through the through hole 17c, and the inner pipe 17b communicates with the chamber 16b below the piston 7a. When the working oil is supplied to the upper chamber 16a through the space between the outer pipe 17a and the inner pipe 17b, the inner cylinder 6 is lifted together with the cylinder body 16,
When hydraulic oil is supplied to the lower chamber 16b through the inner pipe 17b, the inner cylinder 6 is lowered together with the cylinder body 16. That is, the front and rear wheels 12 and 14 can be independently moved up and down as the inner cylinders 6 of the front suspension 3 and the rear suspension 4 are moved up and down.

Further, as shown in FIG. 1, a cab 21 is provided at the center of the vehicle 1 and a cargo bed 22 is provided at the rear.
Is provided. A steering wheel 23 is provided in the center of the front part of the cab 21, and a driver's seat 24 is provided behind the steering wheel 23. Seats 25 are provided on both sides of the driver's seat 24 at a position slightly rearward. That is, the driver operates the steering wheel 23 to operate the front suspension device 3
Is turned to steer the front wheels 12.

In this vehicle 1, a front wheel house 26 and a rear wheel house 27 for accommodating the front wheels 12 and the rear wheels 14 are provided on both front and rear sides of the cab 21, respectively.

As shown in FIGS. 2 and 5, a vehicle body frame (hereinafter, referred to as an inner frame) 2a made of a metal plate forming an inner surface of the front wheel house 26 is provided in the front wheel house 26 and a lower portion of the cab 21. Is partitioned. The inner frame 2a is formed with a substantially quadrangular opening 28 that penetrates the front wheel house 26 and the cab 21. A colorless transparent plate 29 made of synthetic resin or the like is provided outside the inner frame 2a (on the side of the front wheel house 26) so as to close the opening 28. This transparent plate 29
Is provided on the outer side of the inner frame 2a, and the transparent plate 2
It is detachably tightened and fixed by bolts 29a from the outside of 9 via a mounting frame W. That is, these openings 28,
The transparent plate 29, the mounting frame W, and the like form a see-through window 30 as a window portion.

In the vehicle 1 thus constructed, the front wheels 12 and the rear wheels 14 are driven by driving the suspension devices 3 and 4.
You can move up and down to freely adjust the height of the vehicle. Further, even when traveling on a slope or an uneven road surface, the front and rear wheels 12, 14 are appropriately moved up and down in accordance with the road surface condition so that the vehicle 1 is always kept in a substantially horizontal state. be able to.

A see-through window 30 having an opening 28 is formed in the vehicle 1. Therefore, the driver seated in the driver's seat 24 can visually recognize the condition of the road surface near the ground contact portion of the front wheel 12 or in front of the ground surface, for example, the unevenness and the degree of inclination of the road surface from the transparent window 30. Therefore, the vehicle 1 can be driven while always grasping the condition of the road surface, so that the traveling performance of the vehicle 1 can be improved. Similarly, it is possible to easily visually recognize the steering state and the ascending / descending state of the front wheels 12 through the see-through window 30. Furthermore,
The driver can determine the vehicle height and the like of the vehicle 1 from the ascending / descending state of the front wheels 12. Therefore, the driver can get on and off the vehicle 1 smoothly, for example.

Further, since the transparent plate 29 is disposed on the see-through window 30, dirt, stones, etc. from the road surface etc. can be removed from the driver's cab 21.
It is possible to prevent the intrusion. Also, this transparent plate 29
Can be easily attached and detached only by attaching or removing the bolt 29a from the outside of the vehicle 1. Since the transparent plate 29 is detachably attached to the see-through window 30 in this way, when the transparent plate 29 is soiled by dirt or the like, the transparent plate 29 is removed and the removed state is simple. Can be washed. Further, even when the transparent plate 29 is damaged, it can be easily removed and replaced in the same manner. In addition, by attaching the transparent plate 29, the strength of the inner frame 2a can be increased as compared with the case where the transparent plate 29 is not attached.

The present invention is not limited to the above-mentioned embodiments, but may be modified as appropriate and carried out as follows without departing from the spirit of the invention. (1) In the above embodiment, the transparent plate 29 may not be provided in the opening 28, and the opening 28 may simply be used as the see-through window 30. In this case, it is possible to save the labor and time for manufacturing and mounting the transparent plate 29, the mounting frame W, and the like.

In the above embodiment, the transparent plate 29 is directly attached to the opening 28 with the bolt 29a without using the mounting frame W, and the transparent window 29 is formed from the opening 28 and the transparent plate 29. You may. In this case, it is possible to save the labor and time for manufacturing and mounting the mounting frame W and the like.

(2) In the above embodiment, an openable and closable shutter may be provided outside the transparent window 30 (on the front wheel house 26 side). In this case, the perspective window 30 can be protected by closing the shutter,
For example, it is possible to prevent mud or the like from adhering to the transparent plate 29 during traveling. In addition, the opening 28 that does not use the transparent plate 29
In the case of the see-through window 30 consisting only of the above, by closing the shutter, it is possible to prevent dirt and the like from entering the cab 21.

(3) In the above embodiment, as shown by the phantom line in FIG. 2, for example, an illuminating device 31 such as an electric lamp may be attached near the transparent window 30 in the front wheel house 26. Further, as shown by the phantom line in FIG. 3, the lighting device 31 may be attached in the vicinity of the transparent window 30 in the cab 21.

By illuminating the road surface near or in front of the front wheels 12 with this illuminating device 31, the driver can obtain a bright view of the road surface, and the road surface condition can be surely visually recognized. it can.

Further, when the lighting device 31 is provided in the front wheel house 26, the lighting device can be installed at a position close to the road surface, so that a brighter field of view can be obtained. Further, when the lighting device 31 is provided in the operator's cab 21, it is possible to prevent the lighting device from being contaminated by, for example, mud.

The lighting device 31 may be turned on and off by a switch provided in the cab 21. In this case, the driver can easily turn on and off the lighting device in the cab 21.

(4) In the above embodiment, as shown in FIG. 6, a mounting frame W is formed in a slit shape from a plurality of slit holes 32a and a partition plate 32b, and the transparent plate 29 is opened by the mounting frame W. It may be attached to the portion 28. In this case, the road surface condition and the like can be visually recognized from the slit 32a, and the transparent plate 29 can be protected by the partition plate 32b.

Alternatively, the transparent plate 29 may be omitted. In this case, the partition plate 32b can prevent dirt and the like from entering the cab 21. (5) In the above embodiment, the transparent plate 29 is used as the inner frame 2.
The transparent plate 29 is provided outside the inner frame 2
It is arranged so as to close the opening 28 on the inner side of a (the cab 21 side), and the bolt 29a is arranged from the inner side of the inner frame 2a.
May be detachably attached. In this case, the cab 2
The transparent plate 29 can be easily attached and detached from within 1.

The transparent plate 29 may be detachably provided by fitting the transparent plate 29 into the opening 28. (6) In the above embodiment, the hydraulic motor is used as the wheel driving means, but various motors such as an electric motor may be used.

(7) In the above embodiment, for example, the rear wheel 1
The hydraulically driven vehicle may be composed of three wheels by arranging only one in the center of the left and right of the rear part of the vehicle. The technical ideas other than the claims that can be understood from the above embodiments will be described below along with their effects.

(1) The drive vehicle according to any one of claims 1 to 3, wherein the opening / closing shutter is attached to the see-through window 30. According to this driving vehicle, the transparent window 30 can be protected.

(2) The driving vehicle according to any one of claims 1 to 3, wherein the transparent window 30 is provided with an illuminating device. According to this driving vehicle, a bright view of the road surface can be obtained.

(3) The drive vehicle according to any one of claims 1 to 3, wherein the opening 32 is provided in a slit shape. According to this driving vehicle, it is possible to more reliably prevent the entry of mud or the like into the cab 21. Furthermore, damage to the transparent plate 29 due to flying stones or the like can be reduced.

The "transparent plate" used in the present specification
Is defined as follows. "The transparent plate is a plate material that allows light to pass therethrough, and when an object is viewed through the plate material, it means a plate material from which the shape of the object can be visually recognized, and is made of the synthetic resin shown in the above embodiment. Not only a transparent plate material, but also a transparent plate material made of, for example, glass,
It is also meant to include colored transparent plate materials and the like. "

[0036]

As described above in detail, according to the first aspect of the invention, the driver driving the vehicle in the driver's cab can easily understand the road surface condition from the window portion to the front wheel ground contact portion or the front thereof. Can be seen. Further, according to the second aspect of the present invention, since the transparent plate is arranged in the window portion, it is possible to prevent dirt, stones, or the like from entering the cab from the road surface or the like. In addition, according to the third aspect of the invention, since the transparent plate can be removed or replaced, for example, when the transparent plate becomes dirty, it can be easily washed with the transparent plate removed.

[Brief description of drawings]

FIG. 1 is a perspective view of a hydraulic four-wheel drive vehicle in one embodiment embodying the present invention.

FIG. 2 is a side view showing a hydraulic four-wheel drive vehicle in one embodiment.

FIG. 3 is a plan view showing a hydraulic four-wheel drive vehicle in one embodiment.

FIG. 4 is a schematic diagram of a hydraulic cylinder of a suspension device in an embodiment.

FIG. 5 is a partial perspective view showing an inner frame and the like of a front wheel house in one embodiment.

FIG. 6 is a perspective view showing a see-through window formed in a slit shape in another example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2a ... Inner frame, 3 ... Front suspension system as suspension system, 4 ... Rear suspension system as suspension system, 12 ... Front wheel, 14 ... Rear wheel, 13, 15 ... Hydraulic motor as drive means, 21 ... Driver's cab, 26 ... Front wheel house, 28 ... Opening part, 29 ... Transparent plate, 30 ... Transparent window as window part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shunichi Shibasaki 1 Toyota-cho, Toyota-shi, Aichi Toyota Automobile Co., Ltd.

Claims (3)

[Claims] 1. A suspension device is provided at a front portion and a rear portion of a vehicle,
In a drive vehicle in which each of the front wheels and the rear wheels is capable of moving up and down by attaching front wheels and rear wheels equipped with drive means to the suspension device, a cab formed in the vehicle and the front wheels are housed. A drive car with a window formed in the inner frame that separates the wheel house. 2. The drive vehicle according to claim 1, wherein a transparent plate is provided in the window portion. 3. The drive vehicle according to claim 2, wherein the transparent plate is detachably attached to the window portion.