JP2832686B2 - Roller roller with tire drive wheels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure roller having tire driving wheels, and more particularly to a tire roller.

[0002]

2. Description of the Related Art Conventional tire rollers include, for example,
The one shown in FIG. 7 is known. This tire roller is
A hydraulic pump b that is driven by power transmission from the engine a and sends out hydraulic oil is provided below the driver's seat floor of the cabin c. One end of a hydraulic pipe d is connected to the hydraulic pump b, and the hydraulic pipe d extends below the floor of the driver's seat to the rear and the other end reaches the power transmission device e.

The power transmission device e includes a hydraulic motor f to which the other end of the hydraulic pipe d is connected and hydraulic oil supplied from the hydraulic pump b is supplied via the hydraulic pipe d;
Reducer g for reducing the rotation of the differential gear, a differential gear h to which the reduced rotation is input, and a chain mechanism j for transmitting the output of the differential gear h to the rear wheels (drive wheels) i.
And so on. A yoke m for supporting a front wheel (guide wheel) k is attached to the front part of the vehicle body via a vertically long kingpin o arranged in the front frame n so as to be pivotable.

However, in such a tire roller, since the power transmission device e is composed of a number of components such as the hydraulic motor f, the speed reducer g, the differential gear h, and the chain mechanism j, the structure becomes complicated. The number of steps for assembling each component increases, and maintenance requires a long time. Also, the tension adjustment of the chain is very troublesome.

In order to solve such a problem, a tire roller disclosed in Japanese Utility Model Laid-Open No. 6-49505 has been proposed. As shown in FIG. 8, the tire roller has a pair of driving wheels p, p which are adjacent to each other and are disposed one by one in the width direction of the vehicle body, and a pair of driving wheels p, p on the left side. A mounting bracket r is hung from the vehicle body frame between the pair of drive wheels p and p on the right side. A pair of hydraulic motors t, each having an output shaft s protruding only at one end of the motor housing, are mounted on the left and right side plates of the mounting bracket r so that the output shaft s faces outward and is symmetrical to each other. I have. A set of drive wheels p, p is attached to the output shaft s. Of the set of drive wheels p, p, the drive wheel p located on the inner side drives the hydraulic motor t on the side of the mounting bracket r. It is arranged to surround.

[0006] By supplying the hydraulic oil sent from the hydraulic pump to a hydraulic motor t via a hydraulic pipe (both not shown), the power of the engine is supplied via the hydraulic pump, the hydraulic pipe and the hydraulic motor t. It is transmitted to a set of drive wheels p, p, which drives the set of drive wheels p, p. In such a tire roller, the drive wheel p is directly attached to the output shaft s of the hydraulic motor t to transmit power from the engine to the drive wheel p from the hydraulic motor t,
Reduction gear g, differential gear h, and chain mechanism j
Eliminate the need for parts and other parts, simplify the structure of the power transmission device,
As a result, the above-mentioned disadvantage is solved.

[0007]

However, in such a tire roller, a mounting bracket r is disposed between a pair of driving wheels p, p on the left side and a pair of driving wheels p, p on the right side. Therefore, the distance from the outer driving wheel p to the mounting bracket r becomes longer, and the moment load and the like transmitted from the left and right driving wheels p, p at the time of grounding work greatly on the mounting bracket r. . Therefore,
Particularly, in the case of a large tire roller, there is an inconvenience that it is difficult to sufficiently secure the mounting strength of the hydraulic motor t and the drive wheels p and p to the vehicle body frame.

Another problem is that a set of driving wheels p,
There is an inconvenience that it takes a lot of time to replace the drive wheel p located inside of p. That is, the outer drive wheel p can be easily replaced by simply removing it from the output shaft s. However, the inner drive wheel p has the outer drive wheel p on one side and the mounting bracket r on the other side. Because of this arrangement, the outer drive wheel p must be temporarily removed from the output shaft s, the inner drive wheel r must be replaced, and the outer drive wheel p once removed must be reattached to the output shaft s after the replacement. .

SUMMARY OF THE INVENTION The present invention has been made to solve such inconveniences, and a first object of the present invention is to not only simplify the structure of a power transmission device but also to provide a hydraulic motor for a vehicle body frame. It is an object of the present invention to provide a pressure roller capable of improving the mounting strength of the roller. A second object of the present invention is to provide, in addition to the first object, a pressure roller capable of easily replacing individual tire drive wheels.

[0010]

In order to achieve the above object, a rolling roller according to claim 1 has a plurality of driving wheels each composed of a tire mounted on an output shaft of a hydraulic motor, and supplies power of an engine. A pressure roller configured to transmit from the hydraulic motor to the drive wheels, wherein a hydraulic motor having output shafts protruding from both ends of a motor housing is disposed between a pair of drive wheels adjacent to each other. Then, the set of drive wheels is attached to both ends of the output shaft one by one, and further, an attachment portion attached to a bracket suspended from the body frame to the set of drive wheels is attached to the motor housing. The bracket is formed and the mounting portion is mounted on the bracket.

According to a second aspect of the present invention, the distance between the one set of driving wheels and another driving wheel located on the side of the one set of driving wheels is set to be equal to the distance between the one set of driving wheels. The drive wheel on the side facing the other drive wheel and the other drive wheel are individually attached,
It is characterized in that the interval is removable.

[0012]

According to the first aspect of the present invention, one set of drive wheels is attached to both ends of the output shaft of the hydraulic motor, and the mounting portion of the motor housing is provided between the frame of the vehicle body and one set of drive wheels. By attaching the bracket to the suspended bracket, the distance from the outer drive wheel to the bracket is shortened, and the moment load and the like transmitted from the drive wheel to the bracket at the time of ground contact are reduced.

Further, a power transmission device is provided by attaching drive wheels to an output shaft of a hydraulic motor and transmitting the power of the engine from the hydraulic motor to the drive wheels, thereby eliminating the need for components such as a speed reducer, a differential gear, and a chain mechanism. Is simplified. According to the second aspect of the present invention, the distance between one set of drive wheels and another drive wheel located on the side of the one set of drive wheels is set to be opposite to the other drive wheels of the one set of drive wheels. By setting the intervals at which the drive wheels on the side and the other drive wheels can be attached and detached, attachment and detachment of each drive wheel can be performed individually.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an explanatory side view in which a part of a tire roller with a cabin according to an embodiment of the present invention is cut away.
FIG. 3 is an explanatory plan view for explaining the inside of the tire roller with a cabin, FIG. 3 is a cross-sectional view taken along line − of FIG. 1, FIG. 4 is an explanatory cross-sectional view for explaining a power transmission device, and FIG. FIG. 6 is a cross-sectional view taken along a line in FIG. 4.

1 and 2, the tire roller 1 with a cabin is provided with a cabin 3 disposed on the rear upper side of the vehicle body 2. Three tire guide wheels (front wheels) 4a to 4c are arranged at equal intervals in the width direction of the vehicle body 2 at the front of the vehicle body 2, and four tire drive wheels (rear wheels) 5a to 5d are disposed at the rear. 2 are arranged at equal intervals in the width direction.

As shown in FIG. 1, the cabin 3 is formed in a substantially box shape by a roof 6, a floor 7 and front, rear, left and right side members 8 a to 8 d and is unitized, and is fixed to an upper portion of the vehicle body 2. . Inside the cabin 3, various operation levers such as a not-shown instrument, a brake pedal, a parking brake lever, and the like are installed in advance in addition to the driver's seat 9 and the steering wheel 10.

The guide wheel 4b located at the center among the guide wheels 4a to 4c is surrounded by a horizontally arranged square frame-shaped frame 11. An axle 12 passes through the frame 11, and guide wheels 4a to 4c are rotatably supported on the axle 12. As shown in FIGS. 1 and 2, the lower end of the yoke 13 is fixed to the front and rear ends of the frame 11. The upper end of the yoke 13 is connected to the upper panel 16 of the front frame 15 of the vehicle body 2 via the turning bearing 14.
It is supported to be able to turn freely.

In this embodiment, a cross roller bearing in which a roller 19 is held by a retainer 20 between an inner ring 17 and an outer ring 18 is employed as the revolving bearing 14 in this embodiment, as shown in FIG. ing. Although the roller 19 uses a cylindrical roller here, a tapered roller may be used instead. In addition to the cross roller bearing, a single-row or double-row thrust angular ball bearing, a turning thrust cylindrical roller bearing, or the like can be used as the turning bearing 14.

The pivot bearing 14 is horizontally interposed between the yoke 13 and the upper panel 16 with its axis aligned with the pivot center of the yoke 13. In this embodiment, the inner ring 17 is provided. Is fixed to the upper surface of the yoke 13, and the outer ring 18 is fixed to the lower surface of the upper panel 16. Such fixing is performed by a number of bolts and the like (not shown) for both the inner ring 17 and the outer ring 18. Then, the swing bearing 14 having such a small height is attached to the yoke 1.
By interposing horizontally between the upper panel 3 and the upper panel 16, the thickness of the front frame 15 is reduced, and the problem of poor visibility caused by reducing the height of the cabin 3 (described later) is solved. ing.

As shown in FIGS. 2 and 3, a steering arm 21 extends from the upper end of the yoke 13 in the width direction of the vehicle body 2, and a tip end of the steering arm 21 is provided with a cylinder device for steering. 22 piston rods 23 are connected.
The cylinder device 22 turns the yoke 13 via the steering arm 21 by the expansion and contraction, and steers the guide wheels 4a to 4c. Specifically, as is well known, the controller controls the opening of a control valve (neither is shown) by operating the steering wheel 10, so that the cylinder device 2 is operated.
The fluid pressure to 2 is adjusted, and the piston rod 23 expands and contracts. By such expansion and contraction, the steering arm 21 turns integrally with the yoke 13, and the guide wheels 4a to 4c are steered. At this time, in the revolving bearing 14, the inner ring 17 rotates with respect to the outer ring 18 while the roller 19 rotates, so that the yoke 13 can smoothly rotate.

As shown in FIGS. 1 and 2, an engine 24 is disposed in front of the cabin 3 with its crankshaft (not shown) oriented in the width direction of the vehicle body 2 and is so-called horizontally placed. ing. By arranging the engine 24 sideways in this manner, the weight distribution of the vehicle is not deviated to the front, and the front and rear weight balance of the vehicle is secured. A hydraulic pump 25 is attached to one end (left end) of the engine 24 in the width direction of the vehicle body 2. The hydraulic pump 25 is driven by power transmission from the engine 24 and sends out hydraulic oil. One end of each of two hydraulic pipes 26a and 26b is connected to the hydraulic pump 25. As shown in FIG. 2, the other ends of the hydraulic pipes 26a and 26b extend substantially horizontally to the rear of the cabin 3 on the left side.
It is connected to a valve block 27 disposed above between the driving wheels 5b and 5c. Valve block 27
Is disposed at the rear of the cabin 3, and one end of each of two branch pipes 28 a and 28 b is connected to both sides thereof. The other end of each of the branch pipes 28a and 28b extends downward from both sides of the valve block 27 to form a power transmission device 29.
Has been reached.

The power transmission device 29 is for transmitting the power of the engine 24 to the drive wheels 5a to 5d.
As shown in FIG. 5, a pair of wheels disposed between the driving wheel 5a and the driving wheel 5b (a pair of driving wheels) and between the driving wheel 5c and a driving wheel 5d (a pair of driving wheels) are disposed. The multi-stroke radial piston motor 30 is provided. The multi-stroke type radial piston motor 30 is a known hydraulic motor that is thin and generates low-speed, high-torque. As shown in FIGS.
Output shafts 32 protrude from both ends of the motor housing 31. The output shaft 32 includes tapered roller bearings 33a and 33b provided at both ends of the motor housing 31.
It is rotatably supported by.

On the outer peripheral portion of the motor housing 31, two mounting flanges 31a and 31b are formed vertically and spaced apart from each other in the axial direction of the output shaft 32. As shown in FIGS. 1, 2, 4 and 6, the mounting flanges 31a and 31b are provided between the drive wheel 5a and the drive wheel 5b from the body frame 32a and between the drive wheel 5c and the drive wheel 5d. Brackets 32b respectively suspended
Is fixed via a bolt 32c or the like.

More specifically, as shown in FIGS. 4 and 6, the bracket 32b includes a pair of mounting plates 32d which are spaced apart from each other in the width direction of the vehicle body 2 behind the vehicle body 2 and are suspended from the vehicle body frame 32a. Prepare. As shown in FIGS. 4 and 6, the pair of mounting plates 32d are connected to each other by reinforcing ribs 32e and reinforced. A semicircular notch 32f corresponding to half the shape of the motor housing 31 in the circumferential direction is formed on the rear end surfaces of the pair of mounting plates 32d on the rear side of the vehicle body 2. A rectangular column-shaped mounting block 32g, 32h long in the width direction of the vehicle body 2 connects between the arc start points and the arc end points of the notch portions 32f of the pair of mounting plates 32d. As shown in FIG. 6, screw holes 32i for bolts 32c are formed at positions of the mounting blocks 32g and 32h corresponding to the mounting flanges 31a and 31b of the motor housing 31, respectively. Therefore, the motor housing 31 of the multi-stroke radial piston motor 30 is inserted into the cutout 32f, and the mounting flanges 31a, 31b are mounted on the mounting blocks 32g, 32h.
By using four bolts 32c, the multi-stroke radial piston motor 30 can be easily attached to the vehicle body 2. It goes without saying that the multi-stroke radial piston motor 30 can be easily removed.
When fixed to the bracket 32 b, each multi-stroke radial piston motor 30 is located behind the cabin 3.

As shown in FIG.
In the center of the inside is a thin cylinder block 34 with a circular cross section
Are fixed to the output shaft 32. On the left side of the cylinder block 34, a parking brake 41a composed of a multi-disc brake is provided. Parking brake 41a
Applies a predetermined braking force to the output shaft 32 by operating a parking brake lever (not shown) in the cabin 3. As shown in FIG. 5, a plurality (eight in the present embodiment) of cylinders 35 are formed at equal intervals in the circumferential direction on the outer peripheral portion of the cylinder block 34. Is inserted movably in the radial direction of the cylinder block 34. A cam ring 39 having a plurality of (six in this embodiment) cam surfaces 38 is fixedly disposed outside the cylinder block 34. In FIG. 4, the pressure oil flows into each cylinder 35 via the valve block 40 disposed on the right side of the cylinder block 34, so that the piston 37 moves in the cylinder 35. When the cylinder block 34 is pressed, the reaction force causes the output shaft 3
It is designed to rotate together with 2.

Brake mounting plates 41 are fixed to both ends of the motor housing 31 by bolts 41b. By operating a brake pedal (not shown) in the cabin 3, the output shaft 3
2 is provided with a service brake 43 for applying a braking force. A brake drum 42 is arranged on the outer periphery of the service brake 43, and an outer end of the brake drum 42 is fixed to a hub 44 fitted to an end of the output shaft 32. By integrally attaching the service brake 43 to the end of the motor housing 31 in this manner, the power transmission device 29 including the service brake 43 can be easily attached to the bracket 32b. In this embodiment, an inexpensive drum brake is used as a regular brake in order to reduce the cost of the apparatus, but a disk brake may be used instead.

In FIG. 4, the hub 44 of the outer driving wheel 5a is shown.
The disk wheel 45 of the drive wheel 5a is connected to the hub nut 4
6, the hub 44 of the inner drive wheel 5b
The disk wheel 45 of the drive wheel 5b is connected to the hub nut 4
6 attached. The drive wheels 5c and 5d are not shown, but similarly, the hub 4 of the outer drive wheel 5d
The disk nut 45 of the drive wheel 5d is connected to the hub nut 4
6, the hub 44 of the inner drive wheel 5c
The drive wheel 5c has a disc wheel 45 and the hub nut 4
6 attached. In the mounted state,
Of the set of drive wheels 5a, 5b, drive wheel 5b and drive wheel b
The distance from the other driving wheel 5c located on the side of the driving wheel 5c is set such that the driving wheels 5b and 5c can be individually attached and removed. In the present embodiment, it is set the dimensions L ₁ from the hub 44 the end face of the drive wheel 5b to the driving wheel 5c longer than the width L ₂ of the drive wheels 5b. The drive wheels 5a to 5d are attached to the hub 44 by using the mounting flange 31 of the motor housing 31.
This can be performed before or after fixing a, 31b to the bracket 32b.

The hydraulic pump 25 is operated in the cabin 3 by operating an accelerator pedal (not shown) and a forward / reverse switching device.
Supplies hydraulic oil to the valve block 27 via the hydraulic pipe 26a (or 26b), and supplies hydraulic oil from the valve block 27 to each multi-stroke radial piston motor 30 via the branch pipe 28a (or 28b). By doing so, each multi-stroke radial piston motor 30 is separately driven. By such driving, the drive wheels 5a to 5d rotate forward or backward, and the tire roller 1 with the cabin travels forward or backward. The driving wheels 5a, 5b,
The differential between 5c and 5d is that when the vehicle turns, the load on the inner and outer rings changes, and more hydraulic oil is supplied to the multi-stroke radial piston motor 30 on the outer wheel side with a smaller load than on the inner wheel side with a larger load. Secured by being supplied.

In the tire roller 1 with a cabin having such a configuration, a pair of drive wheels 5a, 5a,
The mounting flange 31 of the motor housing 31 is mounted on a bracket 32b suspended between the motor housing 31 and the bracket 5b (or the driving wheels 5c and 5d).
Since the a and 31b are attached, the distance between the ground position of the outer drive wheel 5a (or the drive wheel 5d) and the bracket 32b is shorter than before, and the drive wheels 5a, 5
b (or 5c, 5d) to the moment load transmitted to the bracket 32b can be significantly reduced.
As a result, the power transmission device 2 for the vehicle body frame 32a
9 and the mounting strength of the driving wheels 5a to 5d are greatly improved, and sufficient mounting strength can be ensured even for a large tire roller.

The multi-stroke radial piston motor 3
And a pair of driving wheels 5a,
5b (or drive wheels 5c and 5d) are attached one by one, and the distance between the drive wheels 5b and 5c is set to each drive wheel 5c.
b, 5c, the outer drive wheels 5a, 5d and the inner drive wheels 5b,
5c can be replaced individually, and the working efficiency of replacing the drive wheels can be greatly improved as compared with the related art.

Further, a multi-stroke radial piston motor 30 having a low speed, a high torque and a thin structure is adopted as a hydraulic motor, and drive wheels 5a and 5b (or drive wheels) are respectively provided on output shafts 32 protruding from both ends of a motor housing 31. Since the wheels 5c and 5d) are mounted one by one, the driving torque required for a large tire roller can be obtained, and the output can be reduced as compared with the conventional structure in which two driving wheels are mounted at one end of the output shaft. The space in the axial direction of the shaft 32 can be widened. As a result, a sufficient mounting space for the service brake 43 mounted between the end of the motor housing 31 and the drive wheel can be sufficiently secured, and a large-capacity service brake required for a large tire roller can be easily mounted. Can be.

Further, since the parking brake 41a is provided in the motor housing 31 in addition to the service brake 43, a wider braking force can be applied to the rotation of the output shaft 32. Further, since the driving wheels 5a to 5d are directly attached to the output shaft 32 of the multi-stroke type radial piston motor 30 to transmit the power of the engine 24 to the driving wheels 5a to 5d, the conventional reduction gear, differential gear and Parts such as a chain mechanism can be eliminated, and the structure of the power transmission device can be simplified.

Further, the engine 24 and the hydraulic pump 25
Are arranged in front of the cabin 3, the multi-stroke radial piston motor 30, the valve block 27 and the branch pipes 28 a and 28 b are arranged behind the cabin 3, and the hydraulic pipes 26 a and 26 b are arranged on the side of the cabin 3. Since the components are arranged so that the components are not arranged below the floor of the driver's seat of the cabin 3, the floor of the driver's seat 9 can be lowered to lower the position of the cabin 3, thereby lowering the vehicle height. be able to.

In the above embodiment, the multi-stroke radial piston motor 30 is employed as the hydraulic motor.
It is not necessarily limited to this, and another hydraulic motor may be used. In the above embodiment, the service brake 4
3 is taken as an example, but is not necessarily limited to this, and in the case of a small tire roller in which the required braking force can be obtained only with the parking brake 41a, the power without the service brake 43 is used. As the transmission device 29, the parking brake 41a may be used as a service brake.

Further, in the above embodiment, four drive wheels 5
The present invention can be applied to a tire roller having three or five or more drive wheels, but the present invention is not limited to this. further,
In the above embodiment, the guide wheels 4a to 4c are constituted by tires. However, the guide wheels 4a to 4c may be constituted by steel rolling rollers formed in a drum shape, and the guide wheels 4a to 4c may be constituted by rear wheels. Alternatively, the tire driving wheels 5a to 5d may be used as front wheels.

[0036]

As is apparent from the above description, according to the first aspect of the invention, the moment load and the like transmitted from the driving wheels to the bracket at the time of contact with the ground can be greatly reduced. The effect is obtained that the mounting strength of driving wheels and the like is greatly improved, and sufficient mounting strength can be ensured even for a large tire roller.

Further, since the driving wheels are directly attached to the output shaft of the hydraulic motor to transmit the power of the engine to the driving wheels, parts such as the conventional reduction gear, differential gear, and chain mechanism are not required. Therefore, the effect that the structure of the power transmission device can be simplified can be obtained. According to the second aspect of the present invention, since the outer driving wheel and the inner driving wheel can be individually exchanged, the effect of greatly improving the operation efficiency of exchanging the driving wheels can be obtained as compared with the related art.

[Brief description of the drawings]

FIG. 1 is an explanatory side view in which a part of a tire roller with a cabin according to an embodiment of the present invention is cut away.

FIG. 2 is an explanatory plan view for explaining the inside of a tire roller with a cabin.

FIG. 3 is a sectional view taken along line-in FIG.

FIG. 4 is an explanatory cross-sectional view for explaining a power transmission device.

FIG. 5 is a sectional view taken along line − in FIG. 4;

FIG. 6 is a sectional view taken along line − in FIG. 4;

FIG. 7 is an explanatory diagram for explaining a conventional tire roller with a cabin.

FIG. 8 is an explanatory diagram for explaining a conventional tire roller with a cabin.

[Description of Signs] 1 ... Tire roller with cabin 5a-5d ... Tire drive wheel 24 ... Engine 30 ... Multi-stroke radial piston motor (hydraulic motor) 31 ... Motor housing 31a, 31b ... Mounting flange 32 ... Output shaft 32a ... Body Frame 32b: Bracket

Continuation of the front page (56) References JP-A-62-236903 (JP, A) JP-A-8-132809 (JP, A) JP-A-8-246412 (JP, A) JP-A-5-46501 (JP, A) , U) Japanese Utility Model Hei 6-49505 (JP, U) Japanese Patent Publication No. 41-8125 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) E01C 19/27

Claims (2)

(57) [Claims] 1. A pressure roller comprising a plurality of drive wheels each comprising a tire mounted on an output shaft of a hydraulic motor, and transmitting power of an engine from the hydraulic motor to the drive wheels. A hydraulic motor having an output shaft protruding from both ends of the motor housing is arranged between a pair of the two driving wheels, and the set of driving wheels is attached to both ends of the output shaft one by one. A pressure roller, wherein a mounting portion to be mounted on a bracket suspended from the frame of the vehicle body between the pair of driving wheels is formed in the motor housing, and the mounting portion is mounted on the bracket. 2. The distance between the set of drive wheels and another drive wheel located on the side of the set of drive wheels is set to be opposite to the other drive wheel of the set of drive wheels. 2. The compaction roller according to claim 1, wherein the drive wheel on the side and the other drive wheel are separately attached to each other so as to be detachable.