Crawler belt tensioning mechanism

Abstract

The utility model relates to the technical field of mechanical transmission, in particular to a crawler belt tensioning mechanism which comprises a connecting plate beam, a spring tensioning device and a driven wheel fixing frame. The spring tensioning device comprises a telescopic structure and a spring buffering structure, the telescopic structure is fixed to the connecting plate beam, and the spring buffering structure is connected with the telescopic structure; the driven wheel fixing frame is connected with the spring buffering structure and rotatably provided with a wheel shaft of the driven wheel. The distance between the driven wheel and the driving wheel is adjusted through stretching and retracting of the telescopic structure, then the tensioning effect is achieved, buffering and damping are achieved through the spring buffering structure in the tensioning process, and the high buffering effect is added while the tensioning effect is achieved. According to the crawler belt tensioning mechanism, tensioning of the crawler belts on the driving wheel and the driven wheel can be met, meanwhile, a certain buffering effect can be achieved, and the crawler belt chassis mechanism is prevented from being damaged when encountering external force.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission, in particular to a crawler track tensioning mechanism. Background Art

[0002] The crawler chassis structure needs to maintain a certain pre-tension during operation, and the crawler track will become loose after the equipment has been running for a period of time. Therefore, a tensioning device is needed to tension the crawler track.

[0003] The existing tensioning devices for crawlers mainly include screw tensioning devices and spring tensioning devices. The tension is difficult to adjust and inconvenient to use in actual use. The main reasons are: screw tensioning generally uses adjusting bolts and adjusting nut threads to adjust the horizontal movement of the transmission frame. It is usually a one-time tensioning and belongs to a rigid connection mechanism. Due to the limitation of its structure, its impact force acts completely on the adjusting bolts, adjusting nuts and the baffles of the walking side beam. Once the impact is too large, it will cause the adjusting bolts and adjusting nuts to be damaged or the baffles of the walking side beam to be deformed or welded, reducing the reliability and adaptability of the whole machine. The spring tensioning device is affected by the structure and spring specifications, and the tension is not easy to adjust and control. The crawler walking device has strict requirements on the tension of the crawler. The greater the tension, the better. Excessive tension will cause the crawler to be in a tight state. In the tight state, it is easy to cause damage to the crawler, reducing the service life of the crawler. At the same time, excessive tension will increase the friction of the crawler and the tensioning mechanism, reducing the service life of both. Utility Model Content

[0004] The utility model provides a crawler track tensioning mechanism, which is used to solve the defects in the prior art that the tensioning degree of the tensioning device is difficult to adjust and inconvenient to use in actual application.

[0005] The utility model provides a track tensioning mechanism, comprising:

[0006] A connecting plate beam, on which the axle of the driving wheel is rotatably mounted;

[0007] A spring tensioning device, comprising a telescopic structure and a spring buffer structure, wherein the telescopic structure is fixed to the connecting plate beam, and the spring buffer structure is connected to the telescopic structure;

[0008] The driven wheel fixing frame is connected to the spring buffer structure, and the driven wheel fixing frame can rotatably mount the wheel axle of the driven wheel.

[0009] According to a track tensioning mechanism provided by the utility model, the spring buffer structure includes:

[0010] A connector connected to the driven wheel fixing frame;

[0011] A buffer spring has one end connected to the connector and the other end connected to the telescopic structure.

[0012] According to a track tensioning mechanism provided by the utility model, the spring buffer structure further includes a connecting rod, one end of which is connected to the connecting head, and the buffer spring is sleeved on the connecting rod;

[0013] A movable washer is movably sleeved on the connecting rod, one end of the movable washer is fixedly connected to the buffer spring, and the other end is in contact with the telescopic structure.

[0014] According to a track tensioning mechanism provided by the utility model, the telescopic structure comprises:

[0015] An outer sleeve is fixed to the connecting plate beam, and an inner wall of the outer sleeve is provided with an internal thread;

[0016] An inner sleeve, wherein the outer circumference of the inner sleeve is provided with an external thread, and the external thread of the inner sleeve is screwed together with the internal thread of the outer sleeve; the connecting rod is passed through the inner sleeve, and an annular platform is provided inside the inner sleeve, and the annular platform is in contact with the movable washer.

[0017] According to a track tensioning mechanism provided by the utility model, one end of the inner sleeve extends out of the outer sleeve, and an adjusting nut is fixedly sleeved on the end of the inner sleeve extending out of the outer sleeve.

[0018] According to a track tensioning mechanism provided by the utility model, a limiting gasket is provided at the end of the connecting rod away from the connecting head, and the annular platform of the inner sleeve is located between the movable gasket and the limiting gasket.

[0019] According to a track tensioning mechanism provided by the utility model, an installation frame that penetrates the connecting plate beam is formed on the connecting plate beam, two opposite side frames in the length direction of the installation frame form a slide rail, and the driven wheel fixing frame is movably installed on the slide rail; one of the side frames in the width direction of the installation frame is connected to a mounting groove, and the spring tensioning device is arranged in the mounting groove.

[0020] According to a track tensioning mechanism provided by the utility model, an anti-rolling structure is provided at the edge where the driven wheel fixing frame and the slide rail are assembled.

[0021] According to a track tensioning mechanism provided by the utility model, the anti-roll structure includes a fixed protrusion on one side of the edge of the driven wheel fixing frame and a spin-on gasket on the other side, and the spin-on gasket is detachably mounted on the edge of the driven wheel fixing frame through a connecting piece.

[0022] According to a track tensioning mechanism provided by the utility model, a limiting nut is fixedly sleeved on the outer periphery of the spring tensioning device, and the limiting nut is located at a notch of the mounting groove to fix the spring tensioning device in the mounting groove.

[0023] The utility model provides a track tensioning mechanism, which adjusts the distance between the driven wheel and the driving wheel by telescopic structure, and then achieves the tensioning effect. During the tensioning process, a certain buffering and shock absorption is achieved by the spring buffer structure, which increases the strong shock absorption effect while meeting the tensioning effect. The track tensioning mechanism of the utility model can meet the requirement that the track chassis structure maintains a certain pre-tension during operation, and can travel more flexibly. At the same time, it can also play a certain buffering role to avoid damage to the track chassis mechanism when encountering external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of the crawler track tensioning mechanism provided by the utility model;

[0026] Figure 2 It is a schematic diagram of the connection structure between the spring tensioning device and the driven wheel fixing frame provided by the utility model;

[0027] Figure 3 It is a schematic diagram of the exploded structure of the spring tensioning device provided by the utility model;

[0028] Figure 4 It is a structural schematic diagram of the spring buffer structure provided by the utility model;

[0029] Figure 5 It is a structural schematic diagram of the connecting plate beam provided by the utility model.

[0030] Reference numerals:

[0031] 1. Connecting plate beam; 11. Mounting frame; 12. Mounting groove; 2. Driving wheel; 3. Spring tensioning device; 31. Telescopic structure; 311. Outer sleeve; 312. Inner sleeve; 313. Adjusting nut; 32. Spring buffer structure; 321. Connecting head; 322. Buffer spring; 323. Connecting rod; 324. Movable washer; 325. Limiting washer; 33. Limiting nut; 4. Driven wheel fixing frame; 41. Fixed protrusion; 42. Screw-on washer; 5. Driven wheel. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood in specific circumstances.

[0035] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0037] Combine the following Figure 1 to Figure 5 The specific structure and working principle of the crawler track tensioning mechanism of the utility model are described.

[0038] An embodiment of the utility model provides a track tensioning mechanism, combined with Figure 1 and Figure 2 As shown, it includes a connecting plate beam 1, a spring tensioning device 3 and a driven wheel fixing frame 4, wherein the axle of the driving wheel 2 is rotatably mounted on the connecting plate beam 1; the spring tensioning device 3 includes a telescopic structure 31 and a spring buffer structure 32, the telescopic structure 31 is fixed to the connecting plate beam 1, and the spring buffer structure 32 is connected to the telescopic structure 31; the driven wheel fixing frame 4 is connected to the spring buffer structure 32, and the axle of the driven wheel 5 is rotatably mounted on the driven wheel fixing frame 4.

[0039] It can be understood that the track tensioning mechanism of this embodiment mainly realizes the tensioning of the driving wheel 2 and the driven wheel 5 on the connecting plate beam 1 through the spring tensioning device 3. Specifically, the distance adjustment of the driven wheel 5 relative to the driving wheel 2 is realized through the telescopic structure 31, thereby achieving the tensioning effect. During the tensioning process, a certain buffering and shock absorption is achieved through the spring buffer structure 32, which increases a stronger shock absorption effect while satisfying the tensioning effect. The track tensioning mechanism of this embodiment can satisfy the requirement that the track chassis structure maintains a certain pre-tension during operation, and can travel more flexibly. At the same time, it can also play a certain buffering role to avoid damage to the track chassis mechanism when encountering external forces. The spring tensioning device 3 has a certain degree of freedom and can be flexibly adjusted, which solves the defect that the tension of the existing tensioning device is difficult to adjust.

[0040] In some specific embodiments, in a track tensioning mechanism of the utility model, see Figure 4 As shown, the spring buffer structure 32 mainly includes a connector 321 and a buffer spring 322 . The connector 321 is connected to the driven wheel fixing frame 4 . One end of the buffer spring 322 is connected to the connector 321 , and the other end is connected to the telescopic structure 31 .

[0041] It should be understood that the telescopic structure 31 in the track tensioning mechanism of the utility model can adjust the distance of the driven wheel 5 relative to the driving wheel 2 by fixing one end and telescoping the other end during the tensioning process. In the present embodiment, the connection between the telescopic end of the telescopic structure 31 and the driven wheel fixing frame 4 is mainly achieved through the connection head 321 and the buffer spring 322 of the spring buffer structure 32. When the telescopic structure 31 is stretched for tensioning, it will first act on the buffer spring 322. After the buffer spring 322 is squeezed, it pushes the connection head 321 at the other end to move. The connection head 321 connects the driven wheel fixing frame 4, and then drives the driven wheel fixing frame 4 and the driven wheel 5 to move, so as to adjust the distance of the driven wheel 5 relative to the driving wheel 2. In the adjustment process, in addition to realizing the transmission of power, the buffer spring 322 can also play a certain flexible buffering role. Compared with the rigid connection mechanism of the traditional screw tensioning structure, the flexible buffering adjustment of the present embodiment can avoid the damage to the structure caused by external force impact, and improve the adaptability and reliability of the equipment.

[0042] Based on the above embodiments, some specific examples are shown again. Figure 4 As shown, the spring buffer structure 32 also includes a connecting rod 323, one end of which is connected to the connecting head 321, and the buffer spring 322 is sleeved on the connecting rod 323; a movable washer 324 is movably sleeved on the connecting rod 323, one end of the movable washer 324 is fixedly connected to the buffer spring 322, and the other end is in contact with the telescopic structure 31.

[0043] It can be understood that the connecting rod 323 can guide the compression and extension of the buffer spring 322 to ensure the linear power transmission of the buffer spring 322. The telescopic end of the telescopic structure 31 acts on the movable washer 324, and the movable washer 324 compresses the buffer spring 322, thereby pushing the connecting head 321 and the connecting rod 323 to move together, thereby realizing the adjustment of the driven wheel fixing frame 4.

[0044] Based on the above embodiments, in some other embodiments of a track tensioning mechanism provided by the present invention, see Figure 3 As shown, the telescopic structure 31 mainly includes an outer sleeve 311 and an inner sleeve 312, wherein the outer sleeve 311 is fixed to the connecting plate beam 1, and the inner wall of the outer sleeve 311 is provided with an internal thread; the outer periphery of the inner sleeve 312 is provided with an external thread, and the external thread of the inner sleeve 312 is screwed together with the internal thread of the outer sleeve 311; a connecting rod 323 is passed through the inner sleeve 312, and an annular platform is provided inside the inner sleeve 312, and the annular platform is in contact with the movable washer 324.

[0045] The telescopic structure 31 in this embodiment mainly relies on the adjustment of the relative position of the outer sleeve 311 and the inner sleeve 312 to achieve the final telescopic movement. Specifically, when telescopic tensioning is required, the inner sleeve 312 is rotated. Since the outer thread of the inner sleeve 312 is screwed with the inner thread of the outer sleeve 311, the screw-connected structure can play a certain tensioning and anti-loosening function. When the outer sleeve 311 is fixed to the connecting plate beam 1 and does not move, the inner sleeve 312 will move relative to the outer sleeve 311 under the action of the screw-connected thread. Since the connecting rod 323 is inserted into the inner sleeve 312, as the inner sleeve 312 moves, the annular platform inside the inner sleeve 312 will contact the movable washer 324 on the connecting rod 323, and then squeeze and push the movable washer 324 to move. The movable washer 324 acts on the buffer spring 322 to achieve force transmission, and finally the driven wheel fixing frame 4 drives the adjustment of the driven wheel 5.

[0046] In the process of tensioning, a track tensioning mechanism of the utility model is mainly tensioned by rotating the inner sleeve 312. In some examples, one end of the inner sleeve 312 extends out of the outer sleeve 311, and an adjusting nut 313 is fixedly mounted on the end of the inner sleeve 312 extending out of the outer sleeve 311. By turning the adjusting nut 313, the rotation of the inner sleeve 312 can be easily driven, thereby achieving tension adjustment of the entire mechanism. In order to improve the reliability of the tensioning process of the mechanism, in some examples, a limiting gasket 325 is further provided at the end of the connecting rod 323 away from the connecting head 321. The annular platform of the inner sleeve 312 is located between the movable gasket 324 and the limiting gasket 325. The movable gasket 324 can be used to reduce the resistance when rotating the inner sleeve 312, and the limiting gasket 325 is used to limit the extreme position of the inner sleeve 312.

[0047] The utility model provides a track tensioning mechanism, wherein the driving wheel 2 is fixed relative to the connecting plate beam 1, the driven wheel 5 is connected to the spring tensioning device 3 through the driven wheel fixing frame 4, the spring tensioning device 3 is connected to the connecting plate beam 1, and the distance between the driven wheel 5 and the driving wheel 2 is adjusted by the expansion and contraction of the spring tensioning device 3 relative to the connecting plate beam 1, so as to achieve the track tensioning effect of the driven wheel 5 and the driving wheel 2. In some embodiments, combined with Figure 1 and Figure 5 As shown, an installation frame 11 is formed on the connecting plate beam 1 and penetrates the connecting plate beam 1. Two opposite side frames in the length direction of the installation frame 11 form a slide rail, and the driven wheel fixing frame 4 is movably installed on the slide rail; one of the side frames in the width direction of the installation frame 11 is connected to a mounting groove 12, and the spring tensioning device 3 is arranged in the mounting groove 12.

[0048] It can be understood that the spring tensioning device 3 is fixedly sleeved with a limit nut 33 on the outer periphery, and the limit nut 33 is located at the notch of the mounting groove 12 to fix the spring tensioning device 3 in the mounting groove 12. The telescopic structure 31 of the spring tensioning device 3 is fixed in the mounting groove 12, and the telescopic end of the telescopic structure 31 realizes the position adjustment of the spring buffer structure 32, and the spring buffer structure 32 pushes the driven wheel fixing frame 4 to slide in the mounting frame 11, and the slide rails formed by the two opposite frames in the length direction of the mounting frame 11 facilitate the sliding guide of the driven wheel fixing frame 4.

[0049] In some examples, an anti-roll structure is provided at the edge where the driven wheel fixing frame 4 and the slide rail are assembled, and the anti-roll structure ensures the sliding guidance of the driven wheel fixing frame 4 on the slide rail. Specifically, the anti-roll structure can be two opposite fixed protrusions 41 on the edge of the driven wheel fixing frame 4. For example, the upper edge and the lower edge of the driven wheel fixing frame 4 can be raised, and the upper frame of the installation frame 11 can be movably clamped by the two opposite raised portions on the upper edge, and the lower frame of the installation frame 11 can be movably clamped by the two opposite raised portions on the lower edge, so that the driven wheel fixing frame 4 can slide in the installation frame 11. In other specific examples, combined with Figure 1 and Figure 2 As shown, the upper edge and the lower edge of the driven wheel fixing frame 4 can be raised on one side to form a fixed protrusion 41, and the upper edge and the lower edge of the driven wheel fixing frame 4 can be detachably installed with a screw-on gasket 42 on the other side of the fixed protrusion 41 through a connecting piece, and the frame guide rail of the installation frame 11 is clamped by the screw-on gasket 42 and the fixed protrusion 41; the provision of the screw-on gasket 42 can also facilitate the installation and disassembly of the driven wheel fixing frame 4 in the installation frame 11, and the tightness of the anti-roll structure can be adjusted by the tightness of the installation of the screw-on gasket 42 to better adapt to the sliding of the driven wheel fixing frame 4 in the installation frame 11.

[0050] It is understandable that the above-mentioned embodiments and examples can be combined with each other to form a new structural scheme of the track tensioning mechanism. The track tensioning mechanism of the utility model, under the premise of satisfying the tensioning function, has a compact and reliable overall structure, can meet the requirements of arranging the track tensioning adjustment device in a limited space, has a relatively simple structure, is easy to install and disassemble, is simple and efficient to use, and can provide a good shock-absorbing effect, improve and reduce the damage to the track chassis structure caused by instantaneous impact, can more easily adjust the size of the tensioning force, and can effectively prevent tensioning from being loosened, making inspection, maintenance and replacement simpler and faster. At the same time, the driven wheel fixing frame provides an anti-roll function. When the working platform is moving, the contact position between the spring tensioning device 3 and the driven wheel fixing frame 4 is not prone to relative slippage, dislocation, etc., ensuring the track tensioning effect.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A track tensioning mechanism, characterized in that: include: A connecting plate beam, on which the axle of the driving wheel is rotatably mounted; A spring tensioning device, comprising a telescopic structure and a spring buffer structure, wherein the telescopic structure is fixed to the connecting plate beam, and the spring buffer structure is connected to the telescopic structure; The driven wheel fixing frame is connected to the spring buffer structure, and the driven wheel fixing frame can rotatably mount the wheel axle of the driven wheel.

2. The track tensioning mechanism according to claim 1, characterized in that: The spring buffer structure comprises: A connector connected to the driven wheel fixing frame; A buffer spring has one end connected to the connector and the other end connected to the telescopic structure.

3. The track tensioning mechanism according to claim 2, characterized in that: The spring buffer structure further comprises a connecting rod, one end of which is connected to the connecting head, and the buffer spring is sleeved on the connecting rod; A movable washer is movably sleeved on the connecting rod, one end of the movable washer is fixedly connected to the buffer spring, and the other end is in contact with the telescopic structure.

4. The track tensioning mechanism according to claim 3, characterized in that: The telescopic structure comprises: An outer sleeve is fixed to the connecting plate beam, and an inner wall of the outer sleeve is provided with an internal thread; An inner sleeve, wherein the outer circumference of the inner sleeve is provided with an external thread, and the external thread of the inner sleeve is screwed together with the internal thread of the outer sleeve; the connecting rod is passed through the inner sleeve, and an annular platform is provided inside the inner sleeve, and the annular platform is in contact with the movable washer.

5. The track tensioning mechanism according to claim 4, characterized in that: One end of the inner sleeve extends out of the outer sleeve, and an adjusting nut is fixedly sleeved on the end of the inner sleeve extending out of the outer sleeve.

6. The track tensioning mechanism according to claim 4, characterized in that: A limiting gasket is arranged at the end of the connecting rod away from the connecting head, and the annular platform of the inner sleeve is located between the movable gasket and the limiting gasket.

7. The track tensioning mechanism according to any one of claims 1 to 6, characterized in that: The connecting plate beam is provided with an installation frame which penetrates the connecting plate beam, and two opposite side frames in the length direction of the installation frame form a slide rail, and the driven wheel fixing frame is movably installed on the slide rail; one of the side frames in the width direction of the installation frame is connected with an installation groove, and the spring tensioning device is arranged in the installation groove.

8. The track tensioning mechanism according to claim 7, characterized in that: An anti-roll structure is provided at the edge where the driven wheel fixing frame and the slide rail are assembled.

9. The track tensioning mechanism according to claim 8, characterized in that: The anti-roll structure comprises a fixed protrusion on one side of the edge of the driven wheel fixing frame and a spin-on gasket on the other side. The spin-on gasket is detachably mounted on the edge of the driven wheel fixing frame through a connecting piece.

10. The track tensioning mechanism according to claim 7, characterized in that: A limiting nut is fixedly sleeved on the outer periphery of the spring tensioning device, and the limiting nut is located at a notch of the mounting groove to fix the spring tensioning device in the mounting groove.

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