A track tensioner for a track-laying vehicle

Abstract

The utility model discloses a kind of track tensioning device for track transport vehicle, including guide wheel, tensioning support, pull rod, spring, cylinder and the top rod being located in the inside of cylinder, guide wheel is connected with the U-shaped frame on tensioning support, one end of pull rod is connected with tensioning support, the other end is connected with cylinder, spring is sleeved in the outside of pull rod and cylinder, tensioning support and the connecting place of pull rod are equipped with a plane, the outside fixed sleeve of one end of top rod away from cylinder is equipped with connecting plate;The outside cover of pull rod and cylinder is equipped with first protective cover, the outside cover of top rod is equipped with second protective cover;One end of first protective cover is equipped with first annular plate, and first annular plate is fixedly connected with the plane on tensioning support by bolt;One end of second protective cover is equipped with second annular plate, and second annular plate is fixedly connected with the connecting plate on top rod by bolt;The other end of second annular plate is arranged in the inside of first protective cover, and is slidably connected with first protective cover.

Description

Technical Field

[0001] This utility model relates to the technical field of track tensioning devices, and more particularly to a track tensioning device for tracked transport vehicles. Background Technology

[0002] The track tensioning structure is an essential component of the chassis of tracked transport vehicles such as side-loading rock loaders. Current technology typically employs a hydraulic cylinder and spring-loaded damping structure in these vehicles. When the tracked transport vehicle starts or stops, or traverses rough terrain such as ditches, the tracks are subjected to impact. The spring in the tensioning device acts as a buffer, absorbing the vibration and impact of the entire machine and maintaining track tension. When track tension needs adjustment, the position of the hydraulic cylinder is adjusted by extending or retracting it to change the track tension.

[0003] In existing tensioning devices, components such as springs, cylinders, and push rods within the cylinders are exposed to the external environment. Tracked transport vehicles operate in complex environments, especially side-loading rock-loading machines in coal mines. This can easily lead to debris such as mud, sand, and stones adhering to the springs or push rods and getting stuck between the springs, reducing the springs' vibration absorption capacity. Furthermore, when the push rod slides between the push rod and the cylinder, debris can be drawn into the cylinder by the push rod, reducing the seal between the push rod and the cylinder, potentially damaging components, and shortening the device's service life. Utility Model Content

[0004] The main objective of this invention is to provide a track tensioning device for tracked transport vehicles, in order to solve the problem that in the prior art, the springs, cylinders, push rods, etc. of the tensioning device are exposed to the external environment and are easily affected by mud, sand, and stones, which can affect their function or even cause damage to the parts.

[0005] To solve the above-mentioned technical problems, this utility model is implemented as follows: A track tensioning device for a tracked transport vehicle includes a guide wheel, a tensioning support, a tie rod, a spring, a cylinder, and a push rod slidably disposed inside the cylinder. The guide wheel is connected to a U-shaped frame on the tensioning support. One end of the tie rod is connected to the tensioning support, and the other end is connected to the cylinder. The spring is sleeved on the outside of the tie rod and the cylinder. A flat surface is provided at the connection between the tensioning support and the tie rod. A connecting plate is fixedly sleeved on the outside of the end of the push rod away from the cylinder. An outer cover is provided for the tie rod and the cylinder. The device is provided with a first protective cover and a second protective cover on the outer cover of the top rod; both the first and second protective covers are hollow cylinders; one end of the first protective cover is provided with a first annular plate, which is fixedly connected to the plane on the tensioning support by bolts; one end of the second protective cover is provided with a second annular plate, which is fixedly connected to the connecting plate on the top rod by bolts; the other end of the second annular plate passes through the inside of the first protective cover, and the outer wall of the second protective cover is tightly fitted and slidably connected to the inner wall of the first protective cover.

[0006] As a further technical solution, an oil passage is provided through the top rod, and an oil nozzle communicating with the oil passage is provided on the side wall of the connecting plate.

[0007] As a further technical solution, the first protective cover includes a first annular portion and a semi-circular lower cover and upper cover; the first annular portion is coaxially arranged and integrally formed with the first annular plate, the lower cover is coaxially arranged and integrally formed with the first annular portion, and the upper cover is fastened to the upper cover and forms an annular shape with the upper cover; one side of the upper cover and the lower cover in the axial direction is provided with a connecting assembly that is rotatably connected to each other; the other side of the upper cover and the lower cover in the axial direction is provided with a fixing plate, and the fixing plates on the upper cover and the lower cover are attached to each other and fixed by bolts.

[0008] As a further technical solution, the second protective cover includes a second annular portion, a bottom cover, and a top cover. The second annular portion is coaxially arranged and integrally formed with the second annular plate. The bottom cover is coaxially arranged and integrally formed with the second annular portion. The top cover is fastened to the top of the bottom cover and forms an annular shape with the bottom cover. Threaded holes are provided on the top surfaces of both sides of the top of the bottom cover, and corresponding threaded holes are provided on the bottom surfaces of both sides of the bottom of the top cover. The threaded holes on the bottom surface of the top cover penetrate the outer wall of the top cover. Bolts for fixing the top cover and the bottom cover are provided in the threaded holes between the top cover and the bottom cover.

[0009] As a further technical solution, pads are provided on the bottom surfaces of both sides of the bottom of the upper cover and on the top surfaces of both sides of the top of the lower cover along their length.

[0010] As a further technical solution, pads are provided on the top surfaces of both sides of the top cover and on the bottom surfaces of both sides of the bottom cover along their length.

[0011] As a further technical solution, a first annular ring is fixedly provided on the plane, and the outer diameter of the first annular ring is the same as the inner diameter of the first circular part.

[0012] As a further technical solution, a second annular ring is fixedly provided on the connecting plate, and the outer diameter of the second annular ring is the same as the inner diameter of the second circular ring.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. In this application, the first protective cover is located outside the pull rod, spring, and rod body, and the second protective cover is located outside the top rod, with one end of the second protective cover slidably located outside the first protective cover. Both of them respectively protect the top rod, spring, pull rod, and cylinder body, preventing the outer surface of the spring or top rod from being covered with mud and gravel during the operation of the transport vehicle, thus avoiding damage to them.

[0015] 2. In this application, the upper cover of the first protective cover can be opened, and the top cover of the second protective cover can also be opened after the upper cover is opened, thereby exposing the spring, pull rod, cylinder and push rod, which facilitates simple daily maintenance and inspection, and eliminates the complicated steps of disassembling the first protective cover and the second protective cover. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 for Figure 1 A magnified view of part A in the image;

[0019] Figure 3 This is a schematic diagram of the first protective cover in the open state in this utility model;

[0020] Figure 4 This is a schematic diagram showing the first and second protective covers of this utility model in the open state.

[0021] Figure 5 This is a detailed internal view of the present invention.

[0022] Explanation of reference numerals in the attached figures

[0023] 1. Guide wheel; 2. Tensioning support; 20. Plane; 3. Tie rod; 4. Spring; 5. Cylinder body; 6. Push rod; 60. Connecting plate; 7. First protective cover; 70. First annular plate; 71. First circular part; 72. Lower cover; 73. Upper cover; 74. Connecting assembly; 75. Fixing plate; 8. Second protective cover; 80. Second annular plate; 81. Second circular part; 82. Bottom cover; 83. Top cover; 84. Threaded hole; 9. Oil passage; 10. Oil nozzle; 11. Gasket; 13. First annular ring; 14. Second annular ring. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] like Figures 1-5 As shown, this utility model proposes a track tensioning device for a tracked transport vehicle, including a guide wheel 1, a tensioning support 2, a tie rod 3, a spring 4, a cylinder 5, and a top rod 6 slidably disposed inside the cylinder 5. The guide wheel 1 is connected to a U-shaped frame at one end of the tensioning support 2, one end of the tie rod 3 is connected to the tensioning support 2, and the other end is connected to the cylinder 5. The spring 4 is sleeved on the outside of the tie rod 3 and the cylinder 5.

[0026] In this utility model, such as Figure 1 As shown, a flat surface 20 is provided at the connection between the tensioning support 2 and the tie rod 3, and a connecting plate 60 is fixedly sleeved on the outer end of the push rod 6 away from the cylinder body 5. A first protective cover 7 is provided on the outer surface of the tie rod 3 and the cylinder body 5, and a second protective cover 8 is provided on the outer surface of the push rod 6; both the first protective cover 7 and the second protective cover 8 are hollow cylinders. Figures 1-4 As shown, one end of the first protective cover 7 is provided with a first annular plate 70, which is fixedly connected to the plane 20 on the tensioning support 2 by bolts. The first protective cover 7 includes a first circular part 71 and a semi-circular lower cover 72 and an upper cover 73; the first circular part 71 is coaxially arranged with the first annular plate 70 and integrally formed, the lower cover 72 is coaxially arranged with the first circular part 71 and integrally formed, and the upper cover 73 is fastened above the lower cover 72, forming an annular shape with the upper cover 73. One side of the upper cover 73 and the lower cover 72 in the axial direction is provided with a connecting component 74 that is rotatably connected to each other; the other side of the upper cover 73 and the lower cover 72 in the axial direction is provided with a fixing plate 75, which are attached to each other and fixed by bolts. The connecting component 74 in this utility model can be a hinge from the prior art.

[0027] like Figure 3 and Figure 4 As shown, one end of the second protective cover 8 is provided with a second annular plate 80, which is fixedly connected to the connecting plate 60 on the top rod 6 by bolts; the other end of the second annular plate 80 passes through the inside of the first protective cover 7, and the outer wall of the second protective cover 8 is tightly fitted and slidably connected to the inner wall of the first protective cover 7. The second protective cover 8 includes a second circular ring portion 81, a bottom cover 82, and a top cover 83. The second circular ring portion 81 is coaxially arranged with the second annular plate 80 and integrally formed, the bottom cover 82 is coaxially arranged with the second circular ring portion 81 and integrally formed, and the top cover 83 is fastened above the bottom cover 82 and forms a ring shape with the bottom cover 82. Threaded holes 84 are provided on the top surfaces of both sides of the top of the bottom cover 82, and corresponding threaded holes 84 are provided on the bottom surfaces of both sides of the bottom of the top cover 83. The threaded holes 84 on the bottom surface of the top cover 83 penetrate the outer wall of the top cover 83, and bolts for fixing the top cover 83 and the bottom cover 82 are provided in the threaded holes 84 between the top cover 83 and the bottom cover 82.

[0028] like Figure 4 As shown, in this application, one end of the second protective cover 8 is slidably disposed outside the first protective cover 7. Both protect the push rod 6, spring 4, pull rod 3, and cylinder 5 respectively, preventing damage to the outer surface of the spring 4 or push rod 6 caused by dirt or gravel during operation. Furthermore, the second protective cover 8 and the first protective cover 7 are slidably sealed together, without affecting the tensioning effect of the cylinder 5 and push rod 6. In this application, the length of the second protective cover 8 is slightly longer than the length of the push rod 6. Even when the push rod 6 extends its longest length from the cylinder 5, the second protective cover 8 and the first protective cover 7 will not separate, ensuring the sealing of the interior of both the second and first protective covers 7. Additionally, the upper cover 73 of the first protective cover 7 can be opened, and the top cover 83 of the second protective cover 8 can also be opened after the upper cover 73 is opened, thus exposing the spring 4, pull rod 3, cylinder 5, and push rod 6. This facilitates simple daily maintenance and inspection, eliminating the complex step of completely disassembling the first and second protective covers 7 and 8. In more complex repair situations, the tensioning support 2 and the tie rod 3 can be separated first, and then the first protective cover 7 and the second protective cover 8 can be removed in sequence to carry out complex repairs on the internal tensioning components.

[0029] like Figure 5 As shown, an oil passage 9 is provided through the push rod 6, and an oil nozzle 10 communicating with the oil passage 9 is provided on the side wall of the connecting plate 60. Figure 4As shown, sealing gaskets 11 are provided along their length on the bottom surfaces of both sides of the upper cover 73 and the top surfaces of both sides of the lower cover 72. Gaskets 11 are also provided along their length on the top surfaces of both sides of the bottom cover 82 and the bottom surfaces of both sides of the bottom cover 83. Alternatively, gaskets 11 may be provided only on both sides of the upper cover 73 or the lower cover 72 in the first protective cover 7, and the same applies to the second protective cover 8. This further enhances the sealing of the interior of the first and second protective covers 7 and 8, preventing dust from entering. Additionally, a sealing gasket (not shown in the figure) may also be provided at the end of the upper cover 73 opposite to the first annular portion 71 in the first protective cover 7. A sealing gasket (not shown in the figure) may also be provided at the end of the top cover 83 opposite to the second annular portion 81 in the second protective cover 8.

[0030] like Figure 5 As shown, a first annular ring 13 is fixedly mounted on plane 20, and the outer diameter of the first annular ring 13 is the same as the inner diameter of the first circular ring portion 71. A second annular ring 14 is fixedly mounted on connecting plate 60, and the outer diameter of the second annular ring 14 is the same as the inner diameter of the second circular ring portion 81. The first annular ring 13 and the second annular ring 14 can respectively restrict the position of the first circular ring portion 71 and the second circular ring portion 81, facilitating their positioning and installation.

[0031] The above description is only a preferred embodiment of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A track tensioning device for a track carrier, comprising a guide wheel, a tensioning support, a pull rod, a spring, a cylinder and a push rod slidingly arranged inside the cylinder, the guide wheel being connected to a U-shaped bracket on the tensioning support, one end of the pull rod being connected to the tensioning support and the other end being connected to the cylinder, the spring being sleeved outside the pull rod and the cylinder, characterized in that, A flat surface is provided at the connection between the tensioning support and the pull rod. A connecting plate is fixedly sleeved on the outer side of the end of the push rod away from the cylinder body. A first protective cover is provided on the outer cover of the pull rod and the cylinder body, and a second protective cover is provided on the outer cover of the push rod. Both the first and second protective covers are hollow cylinders. A first annular plate is provided at one end of the first protective cover, and the first annular plate is fixedly connected to the flat surface on the tensioning support by bolts. A second annular plate is provided at one end of the second protective cover, and the second annular plate is fixedly connected to the connecting plate on the push rod by bolts. The other end of the second annular plate passes through the inside of the first protective cover, and the outer wall of the second protective cover is tightly fitted and slidably connected to the inner wall of the first protective cover.

2. A track tensioner for a track-laying vehicle as claimed in claim 1, wherein An oil passage is provided through the top rod, and an oil nozzle communicating with the oil passage is provided on the side wall of the connecting plate.

3. A track tensioning device for a tracked transport vehicle according to claim 1, characterized in that, The first protective cover includes a first circular portion and a semi-circular lower cover and an upper cover; the first circular portion is coaxially arranged with the first annular plate and integrally formed, the lower cover is coaxially arranged with the first circular portion and integrally formed, the upper cover is fastened above the lower cover and forms a ring shape with the upper cover; one side of the upper cover and the lower cover in the axial direction is provided with a connecting assembly that is rotatably connected to each other; the other side of the upper cover and the lower cover in the axial direction is provided with a fixing plate, and the fixing plates on the upper cover and the lower cover are attached to each other and fixed by bolts.

4. A track tensioning device for a tracked transport vehicle according to claim 1, characterized in that, The second protective cover includes a second annular portion, a bottom cover, and a top cover. The second annular portion is coaxially arranged with the second annular plate and integrally formed. The bottom cover is coaxially arranged with the second annular portion and integrally formed. The top cover is fastened to the top of the bottom cover and forms an annular shape with the bottom cover. Threaded holes are provided on the top surfaces of both sides of the top of the bottom cover, and corresponding threaded holes are provided on the bottom surfaces of both sides of the bottom of the top cover. The threaded holes on the bottom surface of the top cover penetrate the outer wall of the top cover. Bolts for fixing the top cover and the bottom cover are provided in the threaded holes between the top cover and the bottom cover.

5. A track tensioning device for a tracked transport vehicle according to claim 3, characterized in that, Pad strips are provided along the length of the bottom surfaces on both sides of the bottom of the upper cover and the top surfaces on both sides of the top of the lower cover.

6. A track tensioning device for a tracked transport vehicle according to claim 4, characterized in that, Pad strips are provided along the length of the top surfaces on both sides of the top of the cover and the bottom surfaces on both sides of the bottom of the cover.

7. A track tensioning device for a tracked transport vehicle according to claim 3, characterized in that, A first annular ring is fixedly provided on the plane, and the outer diameter of the first annular ring is the same as the inner diameter of the first circular part.

8. A track tensioning device for a tracked transport vehicle according to claim 4, characterized in that, A second annular ring is fixedly provided on the connecting plate, and the outer diameter of the second annular ring is the same as the inner diameter of the second circular part.

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