Crawler belt tensioner and track

Abstract

The utility model relates to the technical field of track, concretely refers to a track tensioner and walking part, including track frame, form the oil cylinder mounting plate in the track frame rear part, form the pressure plate in the middle front part, still include tensioning oil cylinder, buffer mechanism and bracket, tensioning oil cylinder installs on the oil cylinder mounting plate, and the bracket slides on the track frame and is assembled with the front side's guide wheel, buffer mechanism connects between the pressure plate and the bracket, and the whole is annular structure, the bracket left side integrative protruding column, protruding column passes through the annular structure inner hole of buffer mechanism again from the pressure plate and can be contacted with the telescopic end of tensioning oil cylinder after, the installation of buffer mechanism on the bracket is detachable, when using, make the telescopic end and the bracket left side end surface contact through tensioning oil cylinder extension and adjust the tension state of track, then install buffer mechanism again, and the installation position of buffer mechanism adapts the position of the bracket adjusted, and the tensioning oil cylinder is not forced again after contraction.

Description

Technical Field

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

[0002] The purpose of a track tensioning mechanism is to maintain a suitable tension on the track, ensuring normal operation without excessive wear. Some track tensioning mechanisms have spring cushioning, but the tensioning cylinder is continuously under pressure. Other tensioning devices have an unloaded tensioning cylinder but no cushioning.

[0003] The existing tracked walking devices have the following technical problems: 1) The track tensioning mechanism has spring buffer, but if the tensioning cylinder is continuously subjected to pressure, the tensioning cylinder seal is easily damaged.

[0004] 2) If the tensioning cylinder of the tensioning device is not under force but has no buffer, the tensioning pad is easily deformed by impact. Utility Model Content

[0005] (a) Technical issues The present invention aims to at least solve the problems in the prior art where tension cylinder parts are easily damaged when there is no buffer and buffer components are easily deformed when there is buffer.

[0006] (II) Technical Content This solution provides a track tensioning device, which is achieved by the following specific technical means: including a track frame, track wheels distributed on the track frame, and a track sleeved between the track wheels; a cylinder mounting plate is formed in the middle and rear part of the track frame, and a pressure plate is formed in the middle and front part; It also includes a tensioning cylinder, a buffer mechanism, and a bracket. The tensioning cylinder is mounted on the cylinder mounting plate, and the bracket slides in the front slide rail of the track frame, with the foremost set of track wheels rotating and mounted on the bracket. The buffer mechanism is an overall ring structure and is connected between the pressure plate and the bracket. There is a protruding post on the left side of the bracket. The protruding post passes through the inner hole of the ring structure of the buffer mechanism and then passes out from the pressure plate to contact the telescopic end of the tensioning cylinder. The initial installation length of the buffer mechanism is adjustable. The buffer mechanism is supported between the tensioned bracket and the pressure plate.

[0007] Preferred technical solution 1: The buffer mechanism includes an annular buffer, adjusting shims, and a clamping plate; the clamping plate is fixed on the bracket, the annular buffer is fixed on the pressure plate, and adjusting shims are placed between the annular buffer and the clamping plate. The number of adjusting shims used is adapted to the gap between the clamping plate and the annular buffer after the tensioning cylinder extends to a suitable length.

[0008] Preferred technical solution 2: The adjusting shim has a U-shaped structure and is inserted into the protruding post.

[0009] Preferred technical solution 3: The axis of the protruding column coincides with the axis of the tensioning cylinder.

[0010] Preferred technical solution four: The annular buffer includes a fixed plate, a movable plate, and a buffer spring; wherein the fixed plate and the movable plate are both annular plates and are slidably connected, the fixed plate is fixed on the pressure plate, and the buffer spring is installed between the movable plate and the fixed plate.

[0011] This solution also provides a running gear equipped with the track tensioning device.

[0012] (III) Technical Effects The above structure gives this solution the following advantages: 1. The tensioning cylinder is not subjected to stress and is not easily damaged; 2. It has a buffer, which can mitigate the impact to a certain extent and prevent the contact parts from deforming. 3. The ring structure of the buffer mechanism, combined with the coaxial arrangement of the convex column and the tensioning cylinder, ensures that the tension transmission direction is along a straight line; Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this solution; Figure 2 This is a partial structural diagram of the scheme; Figure 3 for Figure 2 A schematic diagram of the composition of an explosion; Figure 4 This is a schematic diagram of the ring buffer structure in this scheme.

[0014] Among them, 1. Track frame, 11. Pressure plate, 12. Cylinder mounting plate, 2. Track wheel, 21. Guide wheel, 3. Tensioning cylinder, 4. Buffer mechanism, 41. Adjusting shim, 42. Clamping plate, 43. Annular buffer, 431. Fixed plate, 432. Moving plate, 433. Buffer spring, 434. Bolt, 5. Bracket, 51. Protruding column, 6. Track. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-2 The track tensioning device includes a track frame 1, track wheels 2 distributed on the track frame 1, and a track 6 fitted between the track wheels 2; a cylinder mounting plate 12 is formed in the middle and rear part of the track frame 1, and a pressure plate 11 is formed in the middle and front part. It also includes a tensioning cylinder 3, a buffer mechanism 4, and a bracket 5. The housing of the tensioning cylinder 3 is fixedly installed on the cylinder mounting plate 12. The bracket 5 slides in the slide rail on the front side of the track frame 1, and the frontmost set of track wheels 2 is rotatably installed on the bracket 5. This set of track wheels 2 is used as guide wheels 21. The movement of the guide wheels 21 is used to adjust the tension of the track 6. The buffer mechanism 4 is connected between the pressure plate 11 and the bracket 5. The buffer mechanism 4 is a ring structure. The bracket 5 has an integrally formed protrusion 51 on the left side. The protrusion 51 passes through the inner hole of the ring structure of the buffer mechanism 4 and then through the hole opened on the pressure plate 11 to contact the end face of the telescopic end of the tension cylinder 3 after it is extended. The improved design not only makes the overall structure simpler, but also makes the transmission of tension force more direct. The installation position of the buffer mechanism 4 on the bracket 5 is detachable. In use, the tension cylinder 3 is extended so that the telescopic end contacts the left end face of the protrusion 51 on the bracket 5, pushing the bracket 5 forward along the slide. The tension of the track 6 is adjusted by pushing the guide wheel 21. Then the installation position of the buffer mechanism 4 is adjusted so that the installation position of the buffer mechanism 4 matches the position of the bracket 5 to provide buffer support for the bracket 5. After the buffer mechanism 4 is installed, the tension cylinder 3 releases oil and retracts, disengaging from the contact state with the protrusion 51. The tension cylinder 3 is no longer under force.

[0017] In one embodiment Please see Figure 2 , Figure 3 The buffer mechanism 4 includes an annular buffer 43, an adjusting shim 41, and a retaining plate 42. Specifically, the right side plate of the retaining plate 42 is fixed to the side wall of the bracket 5 with screws, and the U-shaped groove formed by bending the left end is radially inserted into the protrusion 51. The left end of the annular buffer 43 is fixed to the pressure plate 11 and surrounds the hole opened in the pressure plate 11 for the protrusion 51 to pass through. An adjusting shim 41 is placed between the right end of the annular buffer 43 and the left end of the retaining plate 42. The adjusting shim 41 is also a U-shaped structure. When in use, the shims are inserted radially onto the protrusion 51. The number of shims 41 used is matched with the gap formed between the clamping plate 42 and the annular buffer 43 after the tensioning cylinder 3 is extended to a suitable length. That is, when the tension of the track 6 is increased by the tensioning cylinder 3, the gap between the clamping plate 42 and the annular buffer 43 will increase accordingly. At this time, the number of shims 41 used also needs to be increased accordingly or the thickness of the shims 41 used needs to be increased accordingly to fill the gap. After filling, the tensioning cylinder 3 is then de-oiled and retracted. Furthermore, the axis of the protruding post 51 coincides with the axis of the tensioning cylinder 3 and also with the axis of the annular buffer 43, realizing the linear transmission of tension and avoiding deviation during tension transmission, which would affect stability. This makes it less likely for the extension and retraction ends of the protruding post 51 and the tensioning cylinder 3 to deform.

[0018] In one embodiment Please see Figure 2 , Figure 3 , Figure 4 The annular buffer 43 includes a fixed plate 431, a movable plate 432, a buffer spring 433, and a bolt 434; Both the fixed plate 431 and the moving plate 432 are annular plates, and the inner hole size of the annular plate is not less than the diameter of the protrusion 51. The fixed plate 431 is fixed on the bearing plate 11. Multiple sets of bolts 434 are installed along the periphery of the fixed plate 431. The moving plate 432 is slidably sleeved on the bolts of multiple sets of bolts 434 through multiple sets of sliding holes to realize the sliding connection between the fixed plate 431 and the moving plate 432. The buffer spring 433 is installed between the moving plate 432 and the fixed plate 431. The buffer spring 433 is a disc spring. Compared with the column spring, the disc spring has a large load-bearing capacity, strong buffering and vibration absorption capacity, saves axial space and has a long service life. The geometry of the disc spring allows it to withstand a large load under the condition of small axial dimension. Adjusting shim 41 is placed between moving plate 432 and clamping plate 42. During installation, protrusion 51 smoothly passes through the center hole of top plate and moving plate 432.

[0019] This solution also provides a walking unit equipped with the track tensioning device, wherein a set of track wheels at the rear end serves as a power wheel and is connected to the drive unit in the walking unit (using existing technology, the specific structure of which will not be described in detail).

[0020] During use, this solution requires daily maintenance of each component according to the established maintenance plan to ensure its working condition.

[0021] The parts not disclosed in this utility model are all prior art, and their specific structures and working principles will not be described in detail.

[0022] Unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A track tensioning device, comprising a track frame (1), track wheels (2) distributed on the track frame (1), and a track (6) sleeved between the track wheels (2), characterized in that: A cylinder mounting plate (12) is formed in the rear part of the track frame (1), and a pressure plate (11) is formed in the front part. It also includes a tension cylinder (3), a buffer mechanism (4) and a bracket (5). The tension cylinder (3) is mounted on the cylinder mounting plate (12). The bracket (5) slides in the front slide of the track frame (1) and the frontmost set of track wheels (2) serving as guide wheels (21) are mounted on the bracket (5). The buffer mechanism (4) is connected between the pressure plate (11) and the bracket (5); and the whole is a ring structure. The bracket (5) has a protruding post (51) integrally formed on the left side. The protruding post (51) passes through the inner hole of the ring structure of the buffer mechanism (4) and then passes out from the pressure plate (11) to contact the extension end of the tension cylinder (3) after it is extended. The buffer mechanism (4) can be detachably installed on the bracket (5). The buffer mechanism (4) is used to provide elastic support for the bracket (5) after it is adjusted.

2. The track tensioning device according to claim 1, characterized in that: The buffer mechanism (4) includes an annular buffer (43), an adjusting shim (41), and a retaining plate (42). One end of the card plate (42) is mounted on the bracket (5) and the U-shaped groove formed at the other end is inserted into the protrusion (51) radially. The annular buffer (43) is fixed on the pressure plate (11) and an adjusting shim (41) is placed between the annular buffer (43) and the U-shaped groove. The number of adjusting shims (41) used is adapted to the gap between the track tensioning plate (42) and the annular buffer (43).

3. A track tensioning device according to claim 2, characterized in that: The adjusting shim (41) is also a U-shaped structure, which is inserted radially onto the protrusion (51).

4. A track tensioning device according to claim 2, characterized in that: The axis of the protruding post (51), the axis of the annular buffer (43), and the axis of the tensioning cylinder (3) coincide.

5. A track tensioning device according to claim 2, characterized in that: The annular buffer (43) includes a fixed plate (431), a movable plate (432), and a buffer spring (433). The fixed plate (431) and the moving plate (432) are both annular plates and are slidably connected. The fixed plate (431) is fixed on the pressure plate (11), the buffer spring (433) is installed between the moving plate (432) and the fixed plate (431), the adjusting shim (41) is placed between the moving plate (432) and the clamping plate (42), and the protrusion (51) passes through the center hole of the top plate and the moving plate (432).

6. A track tensioning device according to claim 5, characterized in that: The buffer spring (433) is a disc spring.

7. A tracked running gear, characterized in that: Includes the track tensioning device as described in any one of claims 1-6, wherein a set of track wheels (2) located at the rear end is connected as a power wheel to the drive unit in the traveling section.

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