JPH0624365A - Independent suspension mechanism for crawler drive mechanism for vehicle - Google Patents

Abstract

PURPOSE:To perform complete touch with a ground through a sprocket and a crawler press wheel by means of a proper ground touching pressure. CONSTITUTION:A suspension mechanism comprises a spring 7 and a shock absorber 8 disposed to a crawler drive mechanism comprising a sprocket 2 mounted on the rear drive shaft of a vehicle, a crawler press wheel 4, and a crawler 5 is run around the sprocket 2 and the crawler press wheel. Separately from a suspension mechanism 17a, a suspension mechanism 17b comprising a spring and a shock absorber is disposed to the crawler press wheel. The suspension mechanism of the socket and the suspension mechanism of the crawler press wheel are disposed independently from each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an independent suspension mechanism in a track driving mechanism for a truck, more specifically, a sprocket mounted on a truck, a crawler belt pressing wheel,
The present invention relates to improvement of a suspension mechanism of a crawler belt drive mechanism including a crawler belt.

[0002]

2. Description of the Related Art As is well known, a crawler belt drive mechanism including a driving wheel, a driven crawler belt pressing wheel, and a crawler belt mounted over the driving wheel and the driven crawler belt pressing wheel is known. A detailed example of the conventional crawler belt drive mechanism has the following configuration. That is, a bearing stand is arranged in the vehicle, and each of the main driving wheel and the driven crawler belt pressing wheel is pivotally supported on the bearing stand.
The crawler belt drive mechanism has the crawler belt mounted over the main driving wheel and the driven crawler belt pressing wheel. A suspension mechanism including a spring and a shock absorber is arranged on the bearing base plywood in the crawler belt drive mechanism.

That is, the suspension mechanism is arranged on the single bearing stand, and the suspension mechanism of the driven crawler belt pressing wheel is not a separate one from the suspension mechanism of the main driving wheel.

[0004]

According to the above-mentioned prior art, there are some problems in the following points. That is, in the crawler belt drive mechanism, since the single suspension mechanism common to the main driving wheel and the driven crawler belt pressing wheel is provided, the condition of the ground may differ between the main driving wheel and the driven crawler belt pressing wheel. In spite of the large number, the above-mentioned main driving wheel and driven crawler track pressing wheel try to contact the ground with the grounding pressure equalized via the crawler belt by the suspension mechanism. It was not possible to obtain proper ground pressure through the independent tracks of the wheels.
As a result, the ground contact of the main driving wheel and the driven crawler belt pressing wheel to the ground through the crawler belt is incomplete at each part, and thus a strong suspension force of the vehicle itself is hard to be obtained and the stability of the vehicle during traveling is improved. There was a problem that it was difficult to obtain.

Therefore, the object of the present invention is to provide a vehicle,
Especially when the track drive mechanism is provided on the track, the grounding of the main driving wheel and the driven crawler pressing wheel which compose the track driving mechanism to the ground through the track is completed with an appropriate grounding pressure. It is an object of the present invention to provide a technique that makes it possible to obtain a relatively strong suspension force on the vehicle itself and easily obtains stability when the vehicle is running.

[0006]

[Means for Solving the Problems] In order to solve the above object,
The present invention has the following technical means. That is, referring to the reference numerals in the accompanying drawings corresponding to the embodiments, the present invention extends to the sprocket 2 mounted on the rear drive shaft of the vehicle, the crawler belt pressing wheel 4, the sprocket 2 and the crawler belt pressing wheel 4. A suspension mechanism composed of a spring 7 and a shock absorber 8 arranged in a crawler belt drive mechanism composed of a crawler belt 5 mounted on the sprocket 2 separately from a suspension mechanism 17a composed of the spring 7 and the shock absorber 8 of the sprocket 2. A suspension mechanism 17b including a spring 7 and a shock absorber 8 is arranged on the track pressing wheel 4, and the suspension mechanism 17a of the sprocket 2 and the suspension mechanism 17b of the track pressing wheel 4 are independent of each other. In a track crawler drive mechanism characterized by being arranged as It is a scan pension mechanism.

A suspension mechanism 17b for the crawler belt pressing wheel 4 including the spring 7 and the shock absorber 8 described above.
Is considered to be independently provided for each of the left and right crawler belt pressing wheels 4 of the vehicle.

The crawler belt pressing wheel 4 is a front crawler belt pressing wheel 4a.
And the rear crawler belt pressing wheel 4b. The front crawler belt pressing wheel 4a and the rear crawler belt pressing wheel 4b are connected to the support frame 9, and the front crawler belt pressing portion 4a and the rear crawler belt pressing portion 4b are connected. The support frame 9 connecting with the guide rail 2
It is considered that it is connected to the support shaft 12 supported by the moving body 28 that moves in the front-rear direction Y along the line 7.

A front side ring 31 and a rear side ring 32 are attached to the front surface 2a side and the rear surface 2b side of the sprocket 2 with a gap 34 provided therebetween via a pin 33 and a collar 38, respectively. In consideration of the above, it is considered to have the earth and sand escape hole 35 formed through from the front surface 2a to the back surface 2b.

[0010]

According to the above construction, the suspension mechanism 17b for the crawler belt pressing wheel 4 is provided separately from the suspension mechanism 17a for the sprocket 2, and the suspension mechanism 17a for the sprocket 2 and the suspension mechanism 17b for the crawler belt pressing wheel 4 are provided. When the condition of the ground 20 is different on the side of the sprocket 2 and the crawler belt pressing wheel 4 by arranging each of them independently, the suspension mechanism 17 of the sprocket 2 and the crawler belt pressing wheel 4 are adjusted according to the condition of each ground 20. The suspension mechanism 17 of No. 4 works, and the grounding of the sprocket 2 and the crawler belt pressing wheel 4 to the ground 20 can be completed with an appropriate grounding pressure.

[0011]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. That is, the sprocket 2 is attached to the rear drive shaft of the truck 1.
Is attached and the frame 3 of track 1
A crawler belt pressing wheel 4 is attached to the sprocket 2 and a crawler belt 5 is mounted over the sprocket 2 and the crawler belt pressing wheel 4, and the sprocket 2 is provided with a suspension mechanism 17a including a leaf spring 6. Along with the crawler belt pressing wheel 4, a spring 7 and a shock absorber 8 are attached.
A suspension mechanism 17b consisting of

More specifically, the sprocket 2 is attached to the rear drive shaft of the truck 1,
The rear drive shaft is rotated by the drive of, and the sprocket 2 is rotated by the rotation of the rear drive shaft.

Next, paying attention to the crawler belt drive mechanism attached to the frame 3 of the track 1, the frame 3 of the track 1 is divided into a left frame 3a and a right frame 3b along the left-right direction N of the track 1. A left subframe and a right subframe 3d are attached to the left frame 3a and the right frame 3b, respectively. Then, the left frame 3a and the right sub-frame 3
d, in each of the right frame 3b and the left sub-frame,
Together with the sprocket 2 and the crawler belt 5, a crawler belt pressing wheel 4 which constitutes a crawler belt drive mechanism is arranged via various parts.

Therefore, the components arranged on the left frame 3a and the right sub-frame 3d and the crawler belt pressing wheel 4 will be described in detail. The crawler belt pressing wheel 4 is a front crawler belt along the front-rear direction Y of the track 1. It is divided into a pressing wheel 4a and a rear crawler belt pressing wheel 4b, and the front crawler belt pressing wheel 4a and the rear crawler belt pressing wheel 4b are connected by a support frame 9. The front crawler belt pressing wheel 4a and the rear crawler belt pressing wheel 4b are rotatably mounted on the support frame 9 via the mounting shaft 10 and the ball bearing 11, respectively.

A support shaft 12 extending from a crawler belt tension adjusting mechanism 15 described later is fixedly connected to the support frame 9, and the support frame 9 is supported by the support shaft 12. One end 13a of the left swing arm 13 is fixedly connected to the crawler belt tension adjusting mechanism 15. On the other hand, the fixed arm 1 is attached to the right sub-frame 3d.
One end 14a of No. 4 is fixedly connected. Then, the other end 13b of the left swing arm 13 and the fixed arm 14
The other end 14b is attached to the fixed arm 14 such that the left swing arm 13 is rotatable.

Next, a suspension mechanism 17b including a spring 7 and a shock absorber 8 is arranged on the outer frame 16 of the crawler belt tension adjusting mechanism 15. The spring 7 is wound into a coil, and one end thereof is
The spring 7 is attached to the outer mold 16 via a lower spring receiver 18 fixed to the outer mold 16, and the other end of the spring 7 is connected to an upper spring receiver 19 fixed to the left frame 3a. Attached to the left frame 3a. The spring 7 reduces the impact force from the ground 20 that the crawler belt pressing wheel 4 receives via the crawler belt 5 while shrinking, and when the external force disappears, recovers with a repulsive force. Next, regarding the shock absorber 8, the shock absorber 8 is divided into two parts, a first shock absorber 8a and a second shock absorber 8b, both of which use a tubular oil damper. It is a thing. One end 21a of the piston rod 21 of the shock absorber 8 is fixedly connected to the support frame 9, and the other end of the outer cylinder 22 of the shock absorber 8 is connected to the left frame 3a of the shock absorber 8. The shock absorber 8 is attached to the left frame 3a so as to be rotatable about the attachment portion 23 in the left-right direction N. The shock absorber 8 moderates the recovery when the spring 7, which is softened by the impact force from the ground 20 received by the crawler belt pressing ring 4 via the crawler belt 5, is restored by the repulsive force. It suppresses and quickly damps the spring 7.

Next, the crawler belt tension adjusting mechanism 15 in which the support shaft 12 for supporting the support frame 9 is continuous will be described in detail. In the outer mold frame 16, its surface in the front-rear direction Y of the outer mold frame 16 will be described. The screw 24 is disposed over the front wall 16a and the rear wall 16b forming a right angle.
One end and the other end of are fixed to the outer surfaces of the front wall 16a and the rear wall 16b of the outer formwork 16 by adjusting bolts 25, respectively. The outer peripheral surface of the screw 24 is threaded. A moving pipe 26 is attached to the screw 24, and an inner peripheral surface of the moving pipe 26 is threaded so as to mesh with a screw cut on the outer peripheral surface of the screw 24.

Further, in the outer mold frame 16, the outer mold frame 1
6 of the guide rail 2 from the front wall 16a to the rear wall 16b.
7 are provided. A groove 29 is formed in the guide rail 27 so that the moving body 28 can move in the front-rear direction along the guide rail 27, and the convex portion 28a of the moving body 28 is fitted into the groove 29 of the guide rail 27. As a result, the moving body 28 is arranged with respect to the guide rail 27.

Then, the moving pipe 26 and the moving body 28.
And are connected by a connecting body 30. The support shaft 12 is fixedly attached to the side surface 28b of the moving body 28. That is, when the adjusting bolt 25 is adjusted to rotate the screw 24, the moving pipe 26 moves in the longitudinal direction of the screw 24, that is, the front-rear direction Y.
By the movement of the moving pipe 26 in the front-rear direction Y, the moving body 28 connected by the connecting body 30 also moves in the front-rear direction Y along the guide rail 27. Then, the support shaft 12 is moved in the front-rear direction Y by the movement of the moving body 28, and the support shaft 1
The support frame 9 fixed to 2 and the crawler belt pressing wheel 4 attached to the support frame 9 also move in the front-rear direction Y.

A crawler belt 5 formed integrally with rubber is mounted over the sprocket 2 and the crawler belt pressing wheel 4. That is, the tension of the crawler belt 5 mounted over the sprocket 2 and the crawler belt pressing wheel 4 can be adjusted by moving the crawler belt pressing wheel 4 in the front-rear direction Y.

A trailing arm 36 is attached across the outer frame 16 of the crawler belt tension adjusting mechanism 15 and the fixed plate 37 attached to the left frame 3a. The trailing arm 36 is rotatably supported with respect to the outer frame 16 and also with a fixed plate 37 so as to be rotatable, and assists in positioning the crawler belt pressing wheel 4. Is to do.

The parts arranged on the left frame 3a and the right sub-frame 3d and the crawler belt pressing wheel 4 have been described above in detail, but the parts arranged on the right frame 3b and the left sub-frame and The same applies to the crawler belt pressing wheel 4, and the suspension mechanism 17b of the crawler belt pressing wheel 4 is independently provided for each of the left and right crawler belt pressing wheels 4 of the track 1.

Next, paying attention to the sprocket 2, the front side ring 31 and the back side ring 32 are provided on the front surface 2a side and the back surface 2b side of the sprocket 2 with a gap 34 through a pin 33 and a collar 38, respectively. Installed. Then, the sprocket 2 is attached to the sprocket 2 from the surface 2a of the sprocket 2.
The earth and sand escape holes 35 are formed through to the back surface 2b of the above, and a plurality of the earth and sand escape holes 35 are formed.

The shock absorber 8 of the suspension mechanism 17b of the crawler belt pressing wheel 4 is a cylindrical oil damper, but an air damper or the like may be used instead. Although the suspension mechanism 17a of the sprocket 2 is the leaf spring 6 in this embodiment, a suspension mechanism 17a including a spring 7 and a shock absorber 8 may be used instead.

With the above-mentioned structure, focusing on the movement during use, the sprocket 2 and the crawler belt pressing wheel 4 are formed by the suspension mechanism 17a composed of the leaf spring 6 and the suspension mechanism 17a composed of the spring 7 and the shock absorber 8, respectively. The weight on the rear side of the truck 1 is evenly applied to both the sprocket 2 and the crawler belt pressing wheel 4. When an impact is applied from the ground 20 while the truck 1 is traveling, the impact force is absorbed by each of the independent suspension mechanism 17a of the sprocket 2 and suspension mechanism 17b of the crawler belt pressing wheel 4. At this time, the left suspension mechanism 17b and the right suspension mechanism 17b of the crawler belt pressing wheel 4 independently receive an impact force from the ground 20 and absorb the impact force.

In order to drive the truck 1 in accordance with the quality and condition of the ground surface 20, the crawler belt pressing wheel 4 is moved in the front-rear direction Y by the adjustment of the crawler belt tension adjusting mechanism 15, and Adjust the tension.

As described above, since the suspension mechanism 17a of the sprocket 2 and the suspension mechanism 17b of the crawler belt pressing wheel 4 are independently arranged, the ground 20 of the sprocket 2 and the crawler belt pressing wheel 4 is provided.
Grounding to can be completed with proper grounding pressure.

[0028]

As described in detail above, according to the present invention, the sprocket suspension mechanism and the track pressing wheel suspension mechanism are provided, and the sprocket suspension mechanism and the track pressing wheel suspension mechanism are respectively provided. When the ground conditions are different on the side of the sprocket and the track pressing wheel due to the independent arrangement, the suspension mechanism of the sprocket and the suspension mechanism of the track pressing wheel work according to the respective ground conditions, and the sprocket and The track pressing wheel can be grounded to the ground completely with an appropriate grounding pressure, so that a relatively strong suspension force can be obtained for the vehicle itself, and the stability during running of the vehicle can be easily obtained and the riding comfort is also improved. .

According to a second aspect of the present invention, the suspension mechanism for the crawler belt pressing wheel is provided independently of each of the left and right crawler belt pressing wheels of the vehicle, so that when the vehicle is running, the suspension mechanism can be removed from the ground. When an impact is received, the vibration of one crawler belt pressing wheel does not directly affect the other crawler belt pressing wheel, and the vibration of the entire vehicle can be relatively suppressed.

According to a third aspect of the present invention, a support frame connecting the front crawler belt pressing wheel and the rear crawler belt pressing wheel is connected to a support shaft supported by a moving body that moves in the front-rear direction along the guide rail. By this, it is possible to integrally move the front crawler belt pressing wheel and the rear crawler belt pressing wheel in the front-rear direction, and always maintain a constant distance between the front crawler belt pressing wheel and the rear crawler belt pressing wheel. The optimum distance between the front and rear crawler belt pressing wheels and the rear crawler belt pressing wheel can be kept constant at all times.

According to a fourth aspect of the present invention, the front side ring and the back side ring are attached to the front side and the back side of the sprocket, respectively, and a sprocket is provided with earth and sand escape holes. As a result, earth and sand and the like escape through the gap and the earth and sand escape hole, and the earth and sand do not clog on the front surface side and the back surface side of the sprocket. .

[Brief description of drawings]

FIG. 1 is a diagram showing a usage state of an independent suspension mechanism in a track crawler belt drive mechanism according to the present invention.

FIG. 2 is a view showing a state in which the independent suspension mechanism in the track crawler belt drive mechanism according to the present invention is partially omitted and used.

FIG. 3 is a partially omitted plan view of an independent suspension mechanism in a track crawler drive mechanism according to the present invention.

FIG. 4 is a partially omitted side view of an independent suspension mechanism in the track crawler drive mechanism of the present invention.

FIG. 5 is a partially omitted front view of an independent suspension mechanism in a track crawler drive mechanism according to the present invention.

FIG. 6 is a plan view including an internal view of a crawler belt tension adjusting mechanism of an independent suspension mechanism in a crawler belt driving mechanism of the present invention.

FIG. 7 is a side view of a support frame and a crawler belt tension adjusting mechanism of an independent suspension mechanism in a crawler belt driving mechanism according to the present invention.

FIG. 8 is a diagram of a sprocket and a side ring of an independent suspension mechanism in the track crawler drive mechanism of the present invention.

[Explanation of symbols]

 1 track 2 sprocket 2a sprocket front surface 2b sprocket back surface 3 frame 3a left frame 3b right frame 3d right subframe 4 crawler track pressing ring 4a front crawler track pressing ring 4b rear crawler track pressing wheel 5 crawler belt 6 leaf spring 7 spring 8 shock absorber 8a First Shock Absorber 8b Second Shock Absorber 9 Support Frame 10 Mounting Shaft 11 Ball Bearing 12 Support Shaft 13 Left Swing Arm 13a Left Swing Arm One End 13b Left Swing Arm Other End 14 Fixed Arm 14a Fixed Arm One End 14b The other end of the fixed arm 15 Crawler belt tension adjusting mechanism 16 Outer formwork 16a Outer formwork front wall 16b Outer formwork rear wall 17a Sprocket suspension mechanism 17b Crawler track pressing wheel suspension mechanism 18 Lower spring support 19 Upper space Ring holder 20 Ground 21 Piston rod 21a One end of piston rod 22 Outer cylinder 22a One end of outer cylinder 23 Mounting part 24 Screw 25 Adjusting bolt 26 Moving pipe 27 Guide rail 28 Moving body 28a Convex part 28b Side surface of moving body 29 Groove 30 Connecting body 31 front side ring 32 back side ring 33 pin 34 gap 35 earth and sand relief hole 36 trailing arm 37 fixing plate 38 color N left and right direction Y front and back direction

Claims (4)

[Claims] 1. A crawler belt drive mechanism comprising a sprocket 2 attached to a rear drive shaft of a vehicle, a crawler belt pushing wheel 4, and a crawler belt 5 mounted over the sprocket 2 and the crawler belt pushing wheel 4. In the suspension mechanism composed of the spring 7 and the shock absorber 8; apart from the suspension mechanism 17a composed of the spring 7 and the shock absorber 8 of the sprocket 2, the spring 7 and the shock absorber 8 are attached to the crawler belt pressing wheel 4. And a suspension mechanism 17b of the sprocket 2 and a suspension mechanism 17b of the crawler belt pressing wheel 4 are independently arranged. Independent suspension mechanism in the mechanism. 2. A suspension mechanism 17b for the crawler belt pressing wheel 4 including the spring 7 and the shock absorber 8.
2. The independent suspension mechanism in the track drive mechanism of a truck according to claim 1, wherein each of the left and right crawler belt pressing wheels 4 of the vehicle is independently provided. 3. The crawler belt pressing wheel 4 is the front crawler belt pressing wheel 4.
a and a rear crawler belt pressing wheel 4b. The front crawler belt pressing wheel 4a and the rear crawler belt pressing wheel 4b are connected to a support frame 9, and the front crawler belt pressing wheel 4a and the rear crawler belt pressing wheel 4a. 4. The track crawler belt according to claim 1, wherein a support frame 9 connecting with 4b is connected with a support shaft 12 supported by a moving body 28 that moves in the front-rear direction Y along the guide rail 27. Independent suspension mechanism in the drive mechanism. 4. A front side ring 31 and a back side ring 32 are attached to the front surface 2a side and the back surface 2b side of the sprocket 2 with a gap 34 provided therebetween via a pin 33 and a collar 38, respectively. 2. The independent suspension mechanism for a track track drive mechanism according to claim 1, wherein the sprocket 2 has a soil escape hole 35 formed through from the front surface 2a to the back surface 2b.