JPS599991Y2 - Noise reduction device for tracked vehicles - Google Patents

Description

[Detailed explanation of the invention] In conventional tracked vehicles such as hydraulic excavators,
As shown in Fig. 1, the upper center part of the link shoe C mounted between the driving sprocket a and the idle wheel b is supported from below by an upper guide roller d, and the lower side of the link shoe C is supported by a lower guide roller. The support structure is such that it is pressed against the ground from above at point e, but when the vehicle is running, a waving phenomenon as shown by the dotted line occurs on the upper side of link shoe C, causing the driving sprocket a, idle wheel b, and link shoe C to During engagement and disengagement,
There is a drawback that impact force is generated and noise is generated.

It has also been proposed that two upper guide rollers d are provided at a distance between the driving sphere rocket a and the idle wheel b to prevent the upper side of the link shoe C from drooping and guide it. guide roller d
The link shoe is placed far away from the driving sprocket and idle wheel in order to prevent the link shoe from drooping and guide it, and it is not possible to prevent the link shoe from waving between them, resulting in the impact force and noise. cannot be prevented.

This proposal relates to a noise reduction device for tracked vehicles that was developed in view of the above-mentioned circumstances, and is designed to reduce noise on the lower part of the link shoe installed between the driving sprocket and the idle wheel, immediately after the upper part disengages and immediately before the engagement. a buffer support mechanism for the link shoe close to the driving sprocket and the idle wheel;
The feature is that a height adjustment mechanism is provided on one side of the buffer support mechanism, and by providing a simple structure of the buffer support mechanism, it is possible to prevent the waving phenomenon on the upper side of the link shoe and reduce noise generation. The object of the present invention is to provide a noise reduction device for a tracked vehicle that eliminates the above-mentioned drawbacks.

The present invention has the above-mentioned structure, and the lower part of the link shoe installed between the driving sprocket and the idle wheel immediately after the upper part disengages and immediately before the engagement.
A buffer support mechanism is provided for the link shoe close to the driving sprocket and the idle wheel, and a height adjustment mechanism is provided on one side of the buffer mechanism, so that the upper portion of the link shoe immediately after disengagement and immediately before engagement are respectively The shock-absorbing support mechanism significantly suppresses the waving phenomenon on the upper side of the link shoe, and the shock-absorbing support of the portion immediately after the driving sprocket and idle wheel disengage, and the portion immediately before meshing prevents the disengagement of the upper side of the link shoe. The portion immediately after the engagement and the portion immediately before the engagement are held substantially horizontally with little vertical vibration, and engage or disengage from the driving splot or idle wheel, and the impact at the time of the disengagement and engagement is greatly reduced, and the disengagement and engagement occur. The driving performance of the link shoe is improved, and noise is reduced extremely efficiently.

Furthermore, since a height adjustment mechanism is provided on one side of the buffer support mechanism, the height of the buffer support mechanism can be adjusted in accordance with the state of tension on the upper side of the link shoe, that is, the state of the waving phenomenon. The support function can be optimized and the above effects can be further improved.

Furthermore, the present invention can be extremely easily attached to existing tracked vehicles by simply attaching a buffer support mechanism of a simple structure to the lower part of the upper part of the link shoe immediately after separation and immediately before engagement, and can be provided at a low cost. It has such practicality.

Hereinafter, the present invention will be explained with reference to the embodiment shown in FIGS. 2 to 4. Reference numerals 1 and 2 are a driving sprocket and an idle wheel, and a link shoe 3 is mounted between the driving sprocket 1 and the idle wheel 2. There is.

Further, an upper guide roller 4 for correcting slack of the link shoe 3 is pivotally supported at the lower center of the upper side of the link shoe 3, and a lower guide roller 5 is mounted on the lower side of the link shoe 3.
are arranged pivotably at regular intervals.

Further, on the frame 6 connecting the driving sprocket 1 and the idle wheel 2, buffer support mechanisms 7 and 11 are provided close to the inside of the driving sprocket 1 and the idle wheel 2 to support the upper side of the link shoe 3 from below. It is being

One of the buffer support mechanisms 7 includes a load holder 8 fixed to the frame 6, a cushioning material 9 having elasticity such as rubber attached to the load holder 8, and a top surface of the cushioning material 9. The other shock-absorbing support mechanism 11 consists of a load holder 12 fixed to the frame 6 and a load holder 12 fixed to the frame 6, as shown in detail in FIGS. 3 and 4. 1 unit
an adjustment bolt 13 protruding vertically upward from the bolt 13; a cushioning material 14 having elasticity such as rubber that can be moved up and down and loosely fitted to the bolt 13;
A coil spring 15 is inserted between the cushioning material 14 and biasing the cushioning material 14 upward, and a washer 16 is used to force the cushioning material 14 upward.
The nut 1 is screwed onto the adjustment bolt 13 so as to lower the
7, and the buffer support mechanism 7, 11 is configured by a lower portion of the link shoe 3 immediately after detachment from the upper driving sprocket 1 and an idler wheel 2.
It is arranged close to the inner side of the driving sprocket 1 and the idle wheel 2 on the lower side of the part immediately before the link shoe engages with the link shoe, and cushions and supports the part of the link shoe 3 from below immediately after the disengagement and immediately before the link shoe engages, respectively.
The buffer support mechanism 11 is provided with a height adjustment mechanism that can adjust the height of the buffer material 14 by changing the screwing position of the nut 17.

Since the embodiment shown in FIGS. 2 to 4 is constructed as described above, the buffer support mechanisms 7 and 11 allow the upper part of the link shoe 3 immediately after disengagement and the part immediately before the engagement to be protected from below. The non-cushion is cushioned and supported, and the waving phenomenon on the upper side of the link chain is significantly reduced, and the part of the non-cushion immediately after the disengagement and just before the engagement is held almost horizontally with little vertical vibration, and the impact upon disengagement and engagement is greatly reduced. This results in smooth movement, improved link shoe drive performance, and significantly reduced impact noise.

Furthermore, the buffer support mechanism 11 can adjust the height of the buffer material 14 with the nut 17, and can adjust to an appropriate buffer support state in accordance with the state of tension on the upper side of the link shoe 3, that is, the state of the waving phenomenon. It can further enhance the action and effect.

In the above embodiment, the buffer support mechanism 11 side has a height-adjustable structure, but it is also possible to configure the buffer support mechanism 7 side with a height adjustment mechanism. In the explanation of the above-mentioned operation, the explanation was given for traveling forward to the right in the drawing, but when moving backward to the left in the drawing, the part of the link shoe near the upper driving sprocket 1 becomes the meshing side, and the part near the idle wheel 2 becomes the meshing side. will be on the leaving side.

Further, the support portion of the link shoe in the buffer support mechanism is specifically a continuous link portion disposed at the side edge portion of the shoe that forms the shoes in a continuous manner.

[Brief explanation of drawings]

Figure 1 is a side view of a conventional tracked vehicle, Figure 2 is a side view illustrating an embodiment of the noise reduction device for a tracked vehicle according to the present invention, and Figure 3 is the buffer support mechanism of Figure 2. FIG. 4 is a plan view of FIG. 3. 1... Driving sprocket, 2... Idle wheel, 3... Link shoe, 6... Frame,
7, 11...Buffer support mechanism, 8...Load receiver, 9,
14... Cushioning material, 10... Protective steel plate, 12... Load receiver, 13... Adjustment bolt, 15... Coil spring, 16... Washer, 17... Nut.

Claims (1)

[Scope of utility model registration request] A buffer support mechanism for the link shoe, which is close to the driving sprocket and the idle wheel, is provided on the lower side of the upper part of the link shoe mounted between the driving sprocket and the idle wheel, immediately before the upper limb separates and immediately before the engagement; A noise reduction device for a tracked vehicle, characterized in that a height adjuster is provided on one side of a buffer support mechanism.