Crawler belt tensioning structure

Abstract

The utility model relates to a track technical field, concretely relates to a track tensioning structure, including track beam, the both ends of track beam are provided with drive wheel and guide wheel in rotating mode respectively, and drive wheel and guide wheel are connected through track, and the inside of track beam is provided with the support that is rotatably connected with guide wheel, and the support can be telescopic along the direction of movement, and this is prior art, and the place will not be repeated here, the side fixedly connected with tensioning oil cylinder of support is provided with the positioning plate in the end away from guide wheel of tensioning oil cylinder, and the positioning plate is set up in the track beam in fixed structure mode, and the side away from tensioning oil cylinder of positioning plate sets up the adjusting lever, and the adjusting lever is connected with positioning plate through screw thread, and the adjusting lever can pass through positioning plate and rotatably connected with tensioning oil cylinder, first utilize tensioning oil cylinder to make guide wheel to move outward to the track of tensioning, if unable to satisfy the tensioning demand of track that gradually lengthens along with time, then utilize adjusting lever to push tensioning oil cylinder, support and guide wheel to carry out secondary tensioning to track, increase tensioning stroke.

Description

Technical Field

[0001] This utility model relates to the field of track technology, specifically to a track tensioning structure. Background Technology

[0002] Tracked machinery is a type of engineering equipment that uses tracks as its walking device. It has strong terrain adaptability and stability and is widely used in construction, mining, agriculture and other fields.

[0003] Chinese utility model patent application number 202020377876.9—an excavator guide wheel that is easy to maintain—includes a track, with a guide wheel meshing on the inner wall of the track. Rotating shafts extend through the front and rear sides of the guide wheel, and drive shafts are mounted at both ends of the rotating shafts. Side plates are fixedly connected to the left ends of both drive shafts, and mounting plates are movably connected to the opposite sides of the two side plates. Two bolts extend through the opposite sides of the two side plates from top to bottom. A fixing plate is fixedly connected to the left end of the two mounting plates, and a tensioning cylinder is fixedly mounted on the left end face of the fixing plate. The two mounting plates are placed on the opposite sides of the two side plates, and bolts are used to pass through the side plates and mounting plates. Nuts are screwed into the two ends of the bolts to fix the tensioning cylinder to the guide wheel. By exposing the nuts on the front and rear sides of the track, disassembly and maintenance can be easily performed by workers.

[0004] The patented working principle is as follows: grease is injected into the grease cylinder through a grease gun via a grease nozzle, causing the piston to extend outward and push the tension spring, which in turn moves the guide wheel outward to tension the track. The tension spring has an appropriate stroke. However, track pins, sleeves, and chain links are components that continuously wear down. As working time increases, the total length of the entire track gradually increases. The tension cylinder, with its limited stroke, will quickly be stretched to its limit and can no longer provide sufficient thrust to tension the elongated track. Even if the track chain links themselves still have a long service life, the entire track must be replaced prematurely due to the inability to tension, resulting in significant waste. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a track tensioning structure. The technical problem it solves is that existing tensioning cylinders have limited stroke and cannot provide sufficient thrust to tension tracks that gradually lengthen over time. The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A track tensioning structure, characterized in that it comprises:

[0007] The track beam has a drive wheel and a guide wheel at each end, and the drive wheel and guide wheel are connected by a track.

[0008] The bracket is connected to the guide wheel via a rotating structure.

[0009] The tensioning cylinder has one end fixedly connected to the bracket, and the other end of the tensioning cylinder is connected to a positioning plate, which is fixedly installed inside the track beam.

[0010] The adjusting rod is located on the side of the positioning plate away from the tensioning cylinder. The adjusting rod is connected to the positioning plate by a thread, and the adjusting rod can pass through the positioning plate to contact the tensioning cylinder.

[0011] The adjustment window is located on the outer wall of the track beam on one side of the adjustment rod.

[0012] Furthermore, a nut is fixedly installed on the side of the positioning plate away from the tensioning cylinder, and the nut is connected to the adjusting rod by a thread.

[0013] Furthermore, a hexagonal head is fixedly provided at the end of the adjusting rod away from the nut, and the hexagonal head is integrally formed with the adjusting rod.

[0014] Furthermore, a mounting block is fixedly installed in the middle of the track beam, and a bracket is installed on the outside of the mounting block. The bracket has a strip-shaped hole starting from the vertical direction, and a horizontal bolt that is threadedly connected to the mounting block is installed in the strip-shaped hole.

[0015] The upper part of the bracket is equipped with a support for supporting the tracks.

[0016] Furthermore, a fixing block is fixedly installed on the side wall of the track beam below the bracket. The fixing block is connected to a vertical bolt by a thread along the vertical direction, and the upper part of the vertical bolt can abut against the bottom of the bracket.

[0017] Furthermore, the lower part of the bracket is designed with an L-shaped structure.

[0018] Furthermore, the support component is a roller, and the roller is connected to the bracket by a rotating structure.

[0019] Furthermore, the support components are arranged in a ︹ structure.

[0020] The end face of the tensioning cylinder near the positioning plate has a groove; one end of the adjusting rod can be inserted into the groove.

[0021] The beneficial effects of this utility model are as follows:

[0022] First, the track is tensioned by moving the guide wheel outward using a tensioning cylinder. If this is insufficient to meet the increasing tension requirements of the track over time, an adjusting rod is used to push the tensioning cylinder, bracket, and guide wheel for secondary tensioning, increasing the tensioning stroke. Through the cooperation of the bracket and support components, the middle of the upper track is supported, further improving the track tension. By using the combination of these multiple structures, the track tensioning requirements are met.

[0023] By setting a hexagonal head, workers can easily turn the adjusting rod using tools such as wrenches, making operation more convenient. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the track of this utility model;

[0026] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0027] In the picture:

[0028] 1. Track beam, 2. Drive wheel, 3. Guide wheel, 4. Bracket, 5. Tensioning cylinder, 6. Positioning plate, 7. Adjusting rod, 8. Adjusting window, 9. Nut, 10. Hex head, 11. Mounting block, 12. Bracket, 13. Horizontal bolt, 14. Support component, 15. Fixing block, 16. Vertical bolt, 17. Limiting plate. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the utility model will now be described in further detail with reference to the accompanying drawings and the following embodiments, so that the public can better understand the implementation method of this utility model. The specific implementation scheme of this utility model is as follows:

[0030] A track tensioning structure includes a track beam 1, with a drive wheel 2 and a guide wheel 3 rotatably mounted at both ends of the track beam 1. The drive wheel 2 and the guide wheel 3 are connected by a track. A bracket 4 is rotatably connected to the guide wheel 3 inside the track beam 1. The bracket 4 can extend and retract along the direction of movement, which is prior art and will not be described in detail here. A tensioning cylinder 5 is fixedly connected to one side of the bracket 4. A positioning plate 6 is provided at the end of the tensioning cylinder 5 away from the guide wheel 3. The positioning plate 6 is fixedly mounted inside the track beam 1. An adjusting rod 7 is provided on the side of the positioning plate 6 away from the tensioning cylinder 5. The adjusting rod 7 is threadedly connected to the positioning plate 6 and can pass through the positioning plate 6 to rotatably connect with the tensioning cylinder 5. First, the tensioning cylinder 5 is used to move the guide wheel 3 outward to tension the track. If this is insufficient to meet the tensioning requirements of the track as it gradually lengthens, the adjusting rod is used to push the tensioning cylinder 5, the bracket 4, and the guide wheel 3 to perform a second tensioning of the track, increasing the tensioning stroke.

[0031] It should be noted that an adjustment window 8 is provided on the outer wall of the track beam 1 on one side of the adjustment rod 7 to facilitate personnel to rotate the adjustment rod 7.

[0032] Specifically, in order to increase the length of the threaded connection between the positioning plate 6 and the adjusting rod 7, a nut 9 is fixedly installed on the side of the positioning plate 6 away from the tensioning cylinder 5, and the nut 9 is threadedly connected to the adjusting rod 7.

[0033] It should be noted that a hexagonal head 10 is fixedly provided at the end of the adjusting rod 7 away from the nut 9. The hexagonal head 10 is integrated with the adjusting rod 7, which makes it convenient for workers to rotate the adjusting rod 7 using tools such as wrenches, making the operation more convenient.

[0034] The end face of the tensioning cylinder 5 near the positioning plate 6 has a groove, and one end of the adjusting rod 7 can be inserted into the groove to ensure the stability of the connection between the adjusting rod 7 and the tensioning cylinder 5 and prevent misalignment; a limiting plate 17 can also be fixedly installed in the track beam to limit the end of the tensioning cylinder 5 away from the support, further limiting the end of the tensioning cylinder 5 and preventing it from moving.

[0035] Based on the above embodiments, in another embodiment, a mounting block 11 is fixedly installed in the middle of the track beam 1, and a bracket 12 is provided on the outside of the mounting block 11. The bracket 12 has a strip-shaped hole starting vertically, and a horizontal bolt 13 threadedly connected to the mounting block 11 is provided in the strip-shaped hole. A support member 14 for supporting the track is provided on the upper part of the bracket 12. The strip-shaped hole allows the bracket 12 to move within a certain range vertically, thereby supporting the track and further improving the track tension. The combination of the tensioning cylinder and the adjusting rod structure meets the track tension requirements.

[0036] It should be noted that, in order to prevent the bracket 12 from shifting under track pressure, a fixing block 15 is fixedly installed on the side wall of the track beam 1 below the bracket 12. The fixing block 15 is connected to a vertical bolt 16 by a thread along the vertical direction. The upper part of the vertical bolt 16 can abut against the bottom of the bracket 12 to support it and prevent it from falling.

[0037] It should be noted that the lower part of the bracket 12 is designed in an L-shape to facilitate the vertical bolt 16 to abut against the horizontal section of the bracket 12.

[0038] Based on the above embodiments, in this embodiment, the support member 14 is a roller, and the roller is connected to the bracket 12 by a rotating structure; in another embodiment, the support member 14 is a plate with a ︹ structure, which has a lower cost.

[0039] The working principle and process of this utility model are as follows:

[0040] When the track needs to be tightened, grease is first injected into the grease fitting, and then the tensioning cylinder 5 pushes the bracket 4 and the guide wheel 3 outward to tighten the track for the first time.

[0041] If the tensioning cylinder 5 is fully extended but still cannot meet the tensioning requirements, use a wrench to rotate the adjusting rod 7. The adjusting rod 7 is threadedly connected to the positioning plate 6, which pushes the tensioning cylinder 5, the bracket 4 and the guide wheel 3 to move outward, thus tensioning the track a second time.

[0042] If the tension requirement is still not met, further loosen the horizontal bolt 13 without removing it, and then rotate the vertical bolt 16. The vertical bolt 16 pushes the support member 14 through the bracket 12 to further tighten the track.

[0043] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "left," "right," "front," "rear," "lower left," "upper right," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Although this utility model has been described according to a limited number of embodiments, those skilled in the art should understand from the above description that other embodiments can be conceived within the scope of this utility model described herein.

Claims

1. A track tensioning structure characterized by, include: The track beam (1) has a drive wheel (2) and a guide wheel (3) at both ends, and the drive wheel (2) and the guide wheel (3) are connected by the track. The bracket (4) is connected to the guide wheel (3) by a rotating structure; Tensioning cylinder (5), one end of tensioning cylinder (5) is fixedly connected to bracket (4), and the other end of tensioning cylinder (5) is provided with positioning plate (6), which is fixedly installed in track beam (1); Adjusting rod (7) is located on the side of the positioning plate (6) away from the tensioning cylinder (5). The adjusting rod (7) is connected to the positioning plate (6) by a thread, and the adjusting rod (7) can pass through the positioning plate (6) and contact the tensioning cylinder (5). Adjustment window (8) is located on the outer wall of the track beam (1) on one side of the adjustment rod (7).

2. The track tensioning structure according to claim 1, characterized in that: A nut (9) is fixedly installed on the side of the positioning plate (6) away from the tensioning cylinder (5), and the nut (9) is connected to the adjusting rod (7) by a thread.

3. The track tensioning structure according to claim 2, characterized in that: A hexagonal head (10) is fixedly provided at the end of the adjusting rod (7) away from the nut (9), and the hexagonal head (10) is integrally provided with the adjusting rod (7).

4. The track tensioning structure according to claim 1, characterized in that: A mounting block (11) is fixedly installed in the middle of the track beam (1). A bracket (12) is installed on the outside of the mounting block (11). The bracket (12) has a strip hole along the vertical direction. A horizontal bolt (13) that is threadedly connected to the mounting block (11) is installed in the strip hole. The upper part of the bracket (12) is provided with a support (14) for supporting the track.

5. A track tensioning structure according to claim 4, characterized in that: A fixing block (15) is fixedly installed on the side wall of the track beam (1) below the bracket (12). The fixing block (15) is connected to a vertical bolt (16) by a thread along the vertical direction. The upper part of the vertical bolt (16) can abut against the bottom of the bracket (12).

6. The track tensioning structure according to claim 5, characterized in that: The lower part of the bracket (12) is set in an L-shaped structure.

7. A track tensioning structure according to claim 4, characterized in that: The support member (14) is a roller, and the roller is connected to the bracket (12) by a rotating structure.

8. A track tensioning structure according to claim 4, characterized in that: The support member (14) is a plate arranged in a ︹ structure.

9. A track tensioning structure according to claim 1, characterized in that: The end face of the tensioning cylinder (5) near the positioning plate (6) has a groove; One end of the adjusting rod (7) can be inserted into the groove.

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