crawler device

Abstract

The present invention provides a crawler device, comprising: a bracket, a positioning plate and a guide rail provided on the bracket, the guide rail extending in a first direction, and a through hole provided on the positioning plate; a driving wheel rotatably connected to the bracket via a driving wheel shaft, the driving wheel shaft being arranged in a second direction perpendicular to the first direction; a driven wheel rotatably connected to the bracket via a driven wheel shaft, the driven wheel shaft being slidably arranged on the guide rail; a track member sleeved on the outside of the driving wheel and the driven wheel and meshing with the driving wheel and the driven wheel; a tensioning device comprising a connecting rod and a positioning member, the connecting rod being arranged parallel to the guide rail, one end of the connecting rod being connected to the driven wheel shaft, the connecting rod being inserted into the through hole, the driven wheel shaft being able to slide along the guide rail to adjust the distance between the driven wheel shaft and the driving wheel shaft and drive the connecting rod to extend and retract in the through hole, the positioning member being used to be connected between the connecting rod and the positioning plate so that the connecting rod and the positioning plate are relatively positioned, thereby positioning the driven wheel shaft relative to the positioning plate. The present invention can improve the convenience of use.

Description

Technical Field

[0001] The present invention relates to a walking equipment technology, in particular to a crawler device. Background Art

[0002] With the rapid development of modern society and science and technology, tracked vehicles are being increasingly used in various complex environments.

[0003] The existing tracked vehicle includes a connected vehicle body and a track device, the vehicle body is provided with a motor, and the track device includes a track member, a driving wheel, a driven wheel and a tensioning structure, the driving wheel is rotatably connected to the vehicle body through a driving wheel shaft, the driving wheel shaft is connected to the motor, the driven wheel is rotatably connected to the vehicle body through a driven wheel shaft, the driving wheel and the driven wheel are engaged with the track member, and the tensioning structure is connected to the driven wheel shaft, and the tensioning structure is used to apply force to the driven wheel shaft to make the driven wheel shaft move radially, so as to adjust the distance between the driving wheel and the driven wheel, thereby forming a tensioning effect on the track member.

[0004] However, the existing tensioning structure is inconvenient to operate, and it is time-consuming and labor-intensive to adjust the distance between the driving wheel and the driven wheel, which reduces the convenience of use. Summary of the Invention

[0005] The present invention provides a crawler device to improve the convenience of use.

[0006] The present invention provides a crawler device, comprising:

[0007] a bracket, wherein a positioning plate and a guide rail are provided on the bracket, the guide rail extends along a first direction, and a through hole is provided on the positioning plate;

[0008] a driving wheel, rotatably connected to the bracket via a driving wheel shaft, wherein the driving wheel shaft is arranged along a second direction, and the second direction is perpendicular to the first direction;

[0009] A driven wheel is rotatably connected to the bracket via a driven wheel shaft, wherein the driven wheel shaft is parallel to the driving wheel shaft and is slidably arranged on the guide rail;

[0010] A crawler member is sleeved on the outside of the driving wheel and the driven wheel and meshes with the driving wheel and the driven wheel;

[0011] The tensioning device includes a connecting rod and a positioning member, the connecting rod is arranged parallel to the guide rail, one end of the connecting rod is connected to the driven wheel shaft, the connecting rod is passed through the through hole, the driven wheel shaft can slide along the guide rail to adjust the distance between the driven wheel shaft and the driving wheel shaft and drive the connecting rod to extend and retract in the through hole, and the positioning member is used to connect between the connecting rod and the positioning plate to position the connecting rod relative to the positioning plate, thereby positioning the driven wheel shaft relative to the positioning plate.

[0012] Based on the above, the crawler device provided by the present invention has the following advantages: when the track member needs to be installed, the driven wheel shaft can be quickly slid along the guide rail to shorten the distance between the driven wheel shaft and the driving wheel shaft. At this time, the connecting rod is extended and retracted in the through hole of the positioning plate. Since the distance between the driven wheel shaft and the driving wheel shaft is shortened, the track member can be conveniently mounted on the driven wheel shaft and the driving wheel shaft. The driven wheel shaft can then be quickly slid along the guide rail to increase the distance between the driven wheel shaft and the driving wheel shaft, thereby tensioning the track member. After the track member is tensioned, the positioning member can be connected between the connecting rod and the positioning plate to position the connecting rod relative to the positioning plate. When the track member needs to be removed, the positioning member only needs to release the positioning of the connecting rod and the positioning plate, and the driven wheel shaft can be quickly slid along the guide rail, thereby shortening the distance between the driven wheel shaft and the driving wheel shaft, making it easier to remove the track member. As a result, the tensioning structure is simple and convenient to operate, and the process of adjusting the distance between the driving wheel and the driven wheel is quick and effortless, thereby improving the convenience of use of the crawler device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic structural diagram of a crawler device provided in an embodiment of the present invention;

[0014] Figure 2 A horizontal cross-sectional view of a crawler device provided by an embodiment of the present invention;

[0015] Figure 3 A vertical cross-sectional view of a crawler device provided in an embodiment of the present invention;

[0016] Figure 4 A schematic diagram of the internal structure of a crawler device provided in an embodiment of the present invention;

[0017] Figure 5 A schematic diagram of a partial structure of a crawler device provided in an embodiment of the present invention;

[0018] Figure 6 A schematic diagram of another partial structure of a crawler device provided by an embodiment of the present invention;

[0019] Figure 7 A front view of an adsorption device of a crawler device provided by an embodiment of the present invention;

[0020] Figure 8 A three-dimensional diagram of an adsorption device of a crawler device provided in an embodiment of the present invention.

[0021] Reference numerals:

[0022] 100: adsorption device; 101: adsorption member; 102: connecting plate;

[0023] 103: elastic member; 104: guide device; 105: connecting rod;

[0024] 106: first pin; 107: perforation; 108: stopper;

[0025] 109: guide wheel; 110: second pin; 111: frame;

[0026] 112: Magnetic block; 200: Track device; 201: Track member;

[0027] 202: bracket; 203: positioning plate; 204: guide rail;

[0028] 205: through hole; 206: driving wheel; 207: driving wheel shaft;

[0029] 208: driven wheel; 209: driven wheel shaft; 210: tensioning device;

[0030] 211: connecting rod; 212: positioning member; 213: first positioning nut;

[0031] 214: second positioning nut; 215: abutment portion; 216: connecting hole;

[0032] 217: top plate; 218: bottom plate; 219: motor;

[0033] 220: protective cover; 221: top plate body; 222: first wing plate;

[0034] 223: Bottom plate body; 224: Second wing plate; 225: Motor mounting plate. DETAILED DESCRIPTION

[0035] In order to make the purposes, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0036] Please refer to Figure 1-3, an embodiment of the present invention provides a crawler device 200, comprising: a bracket 202, wherein the bracket 202 is provided with a positioning plate 203 and a guide rail 204, wherein the guide rail 204 extends along a first direction, and the positioning plate 203 is provided with a through hole 205; a driving wheel 206, which is rotatably connected to the bracket 202 via a driving wheel shaft 207, wherein the driving wheel shaft 207 is arranged along a second direction, and the second direction is perpendicular to the first direction; a driven wheel 208, which is rotatably connected to the bracket 202 via a driven wheel shaft 209, wherein the driven wheel shaft 209 is parallel to the driving wheel shaft 207 and is slidably arranged on the guide rail 204; a track member 201, which is sleeved on the outside of the driving wheel 206 and the driven wheel 208 and is rotatably connected to the driving wheel 206 and meshed with the driven wheel 208; the tensioning device 210 includes a connecting rod 211 and a positioning member 212, the connecting rod 211 is arranged parallel to the guide rail 204, one end of the connecting rod 211 is connected to the driven wheel shaft 209, the connecting rod 211 is passed through the through hole 205, the driven wheel shaft 209 can slide along the guide rail 204 to adjust the distance between the driven wheel shaft 209 and the driving wheel shaft 207 and drive the connecting rod 211 to extend and retract in the through hole 205, the positioning member 212 is used to be connected between the connecting rod 211 and the positioning plate 203 so that the connecting rod 211 and the positioning plate 203 are relatively positioned, thereby positioning the driven wheel shaft 209 and the positioning plate 203 relative to each other.

[0037] In the crawler device 200 of this embodiment, when the track member 201 needs to be installed, the driven wheel shaft 209 can be quickly slid along the guide rail 204 to shorten the distance between the driven wheel shaft 209 and the driving wheel shaft 207. At this time, the connecting rod 211 is retracted in the through hole 205 of the positioning plate 203. Since the distance between the driven wheel shaft 209 and the driving wheel shaft 207 is shortened, the track member 201 can be conveniently sleeved on the driven wheel shaft 209 and the driving wheel shaft 207. Thereafter, the driven wheel shaft 209 can be quickly slid along the guide rail 204 to increase the distance between the driven wheel shaft 209 and the driving wheel shaft 207, thereby tightening the track member 201. After the track member 201 is tightened, the positioning member 212 can be connected between the connecting rod 211 and the positioning plate 203 to position the connecting rod 211 relative to the positioning plate 203. When the track member 201 needs to be disassembled, the positioning member 212 only needs to release the positioning of the connecting rod 211 and the positioning plate 203, so that the driven wheel shaft 209 can slide quickly along the guide rail 204, thereby shortening the distance between the driven wheel shaft 209 and the driving wheel shaft 207, making it easier to remove the track member 201. As a result, the tensioning structure is easy to operate, and the distance between the driving wheel 206 and the driven wheel 208 can be adjusted quickly and effortlessly, thereby improving the convenience of use of the track device 200.

[0038] In this embodiment, preferably, the connecting rod 211 is a screw rod, and the positioning member 212 includes a first positioning nut 213 and a second positioning nut 214. The first positioning nut 213 and the second positioning nut 214 are sleeved on the screw rod and threadedly connected to the screw rod. The positioning plate 203 is located between the first positioning nut 213 and the second positioning nut 214. The first positioning nut 213 and the second positioning nut 214 can cooperate to clamp the positioning plate 203 so that the screw rod and the positioning plate 203 are relatively positioned. Thus, when the track member 201 is tightened, the first positioning nut 213 and the second positioning nut 214 can cooperate to clamp the positioning plate 203 so that the connecting rod 211 is positioned relative to the positioning plate 203. When the track member 201 needs to be disassembled, it is only necessary to loosen the first positioning nut 213 or the second positioning nut 214 located between the positioning plate 203 and the driven wheel shaft 209 to release the positioning of the connecting rod 211 and the positioning plate 203. The driven wheel shaft 209 can then slide quickly along the guide rail 204, thereby shortening the distance between the driven wheel shaft 209 and the driving wheel shaft 207, making it easier to remove the track member 201. As a result, the positioning member 212 has a simple structure and is easy to operate.

[0039] In this embodiment, preferably, the first end of the screw is connected to the driven wheel shaft 209, and the second end of the screw is provided with an abutment portion 215. The first positioning nut 213 is located between the abutment portion 215 and the positioning plate 203. The abutment portion 215 is used to abut against the first positioning nut 213 to limit the movement of the first positioning nut 213 along the screw.

[0040] In this embodiment, the guide rail 204 is preferably a guide shaft connected to the positioning plate 203. The driven wheel shaft 209 is provided with a connecting hole 216. The driven wheel shaft 209 is inserted into the guide shaft through the connecting hole 216 and can slide along the guide shaft. As a result, the guide rail 204 has a simple structure, reliable guidance, and is easy to assemble.

[0041] In this embodiment, preferably, the axes of the guide shaft, connecting rod 211, driving wheel shaft 207, and driven wheel shaft 209 are coplanar, there are two tensioning devices 210, and the connecting rods 211 of the two tensioning devices 210 are spaced apart in the second direction, and the guide shaft is located between the connecting rods 211 of the two tensioning devices 210. Thus, the driven wheel shaft 209 is positioned by the two tensioning devices 210, which helps improve positioning stability. Because the axes of the guide shaft, connecting rod 211, driving wheel shaft 207, and driven wheel shaft 209 are coplanar, the distance the driven wheel shaft 209 slides on the guide shaft can be fully converted into the distance change between the driving wheel shaft 207 and the driven wheel shaft 209, which helps improve adjustment efficiency. In addition, the guide shaft is located between the connecting rods 211 of the two tensioning devices 210, which helps improve the stability of the driven wheel shaft 209 sliding along the guide shaft.

[0042] In this embodiment, preferably, there are two guide shafts, which are spaced apart in the second direction, thereby improving the stability of the driven wheel shaft 209 sliding along the guide shafts.

[0043] Please refer to Figure 4-6 In this embodiment, preferably, the bracket 202 includes a top plate 217 and a bottom plate 218. The top plate 217 and the bottom plate 218 are parallel and extend along a first direction. The top plate 217 and the bottom plate 218 are spaced apart in a third direction, which is perpendicular to the first and second directions. The positioning plate 203 is sandwiched between the top plate 217 and the bottom plate 218 and extends along the third and second directions. The tensioning device 210 is located between the top plate 217 and the bottom plate 218. This helps improve the structural stability of the crawler device 200 and makes the structure of the crawler device 200 more compact.

[0044] In this embodiment, preferably, the crawler device 200 further includes a motor 219, which is connected to the bracket 202 and sandwiched between the top plate 217 and the bottom plate 218. The output end of the motor 219 is connected to the driving wheel shaft 207, and is used to drive the driving wheel shaft 207 to rotate, thereby driving the driving wheel 206 to rotate. This makes the crawler device 200 modular, that is, the driving wheel shaft 207 can be directly driven by the motor 219 within the crawler device 200, without having to connect to the motor 219 outside the crawler device 200 through a transmission system, thereby simplifying the structure. In addition, the motor 219 is sandwiched between the top plate 217 and the bottom plate 218, which helps to make the structure of the crawler device 200 more compact.

[0045] In this embodiment, preferably, the crawler device 200 further includes protective covers 220, which are located on both sides of the bracket 202. The top plate 217 includes a top plate body 221 and a first wing plate 222. The top plate body 221 is provided with a first wing plate 222 on both sides. The first wing plate 222 extends in the first and second directions and is located between the ends of the top plate body 221. The first wing plate 222 is connected to the protective covers 220. The bottom plate 218 includes a bottom plate body 223 and a second wing plate 224. The bottom plate body 223 is provided with a second wing plate 224 on both sides. The second wing plate 224 extends in the first and second directions and is located between the ends of the bottom plate body 223. The second wing plate 224 is connected to the protective covers 220. Therefore, the first wing plate 222 and the second wing plate 224 can be conveniently connected to the protective covers 220 on both sides of the bracket 202.

[0046] In this embodiment, preferably, the crawler device 200 further includes a motor mounting plate 225, which is connected between the first wing plate 222 and the second wing plate 224 located on the same side of the top plate 217 and the bottom plate 218 and extends along the first direction and the third direction. An accommodating cavity is formed between the top plate 217, the bottom plate 218, and the motor mounting plate 225, and the motor 219 is located in the accommodating cavity and connected to the motor mounting plate 225. Thus, the top plate 217, the bottom plate 218, and the motor mounting plate 225 can protect the motor 219 and facilitate installation of the motor 219.

[0047] Please refer to Figure 7 and Figure 8 102 and 103. The two ends of the elastic member 103 are respectively connected to the adsorption member 101 and the connecting plate 102. The elastic member 103 is supported between the connecting plate 102 and the adsorption member 101 so that the connecting plate 102 and the adsorption member 101 can maintain a relative positioning state; a connecting portion is provided on the track member 201, and the connecting portion is connected to the connecting plate 102. The elastic member 103 extends along the radial direction of the track member 201 so that the adsorption member 101 is located outside the track member 201; there are multiple adsorption devices 100, and the multiple adsorption devices 100 are arranged at intervals along the circumference of the track member 201, and each of the adsorption devices 100 is arranged along the width direction of the track member 201.

[0048] The crawler device 200 in this embodiment can make the adsorption member 101 and the connecting plate 102 move relative to each other due to the expansion and contraction or bending of the elastic member 103. When the crawler device 200 walks on a non-planar working surface, the adsorption member 101 will be subjected to the pressure of the working surface. Under the action of the pressure and the elastic force of the elastic member, the adsorption member 101 will move relative to the connecting plate 102, so that the adsorption member 101 can fit with the working surface, thereby helping to improve the adsorption force of the adsorption member 101 on the working surface, preventing the crawler device 200 from detaching from the working surface and falling, thereby improving the reliability of use. At the same time, under the support of the elastic member 103, the stability of the crawler device 200 can be guaranteed. The crawler device 200 is adsorbed and supported on the working surface by multiple adsorption devices 100, which can improve the adsorption force of the crawler device 200 on the working surface, thereby improving the reliability and stability of the crawler device 200 walking on the working surface.

[0049] In this embodiment, preferably, the adsorption device 100 also includes a guide device 104, the guide device 104 includes a connecting rod 105 and a first pin 106, the first end of the connecting rod 105 is hinged to the adsorption component 101 through the first pin 106, and the first pin 106 is perpendicular to the radial direction of the track component 201; a through hole 107 is provided on the connecting plate 102, and the connecting plate 102 is sleeved between the first end and the second end of the connecting rod 105 through the through hole 107 and can slide along the connecting rod 105. When in use, the first pin shaft 106 can be made perpendicular to the width direction of the track member 201. Even if the first pin shaft 106 is perpendicular to the radial and width directions of the track member 201, when the track device 200 walks on a non-planar working surface, the adsorption member 101 will be subjected to the pressure of the working surface. Under the action of pressure and the elastic force of the elastic member 103, the adsorption member 101 will drive the connecting rod 105 to expand and contract in the through hole 107, and the adsorption member 101 will rotate relative to the connecting plate 102 with the first pin shaft 106 as the center, so that the adsorption member 101 can fit with the working surface, thereby helping to improve the adsorption force of the adsorption member 101 on the working surface, preventing the track device 200 from detaching from the working surface and falling, thereby improving the reliability of use. In addition, since the first pin shaft 106 is perpendicular to the radial and width directions of the track member 201, the guide device 104 limits the relative movement of the adsorption member 101 and the connecting plate 102 in the direction perpendicular to the radial and width directions of the track member 201, thereby improving the supporting force of the adsorption device 100.

[0050] In this embodiment, preferably, there are multiple guide devices 104, and the multiple guide devices 104 are spaced apart along the width direction of the track member 201. Since the multiple guide devices 104 are spaced apart along the width direction of the track member 201, the adsorption member 101 can be effectively prevented from rotating relative to the connecting plate 102 about the connecting rod 105, thereby improving the stability and reliability of the adsorption device 100.

[0051] In this embodiment, preferably, the adsorption device 100 also includes a limiter 108, which is connected between the second end of the connecting rod 105 and the connecting plate 102 to limit the movement of the connecting plate 102 toward the second end of the connecting rod 105; the elastic member 103 is a spring, and each connecting rod 105 is provided with a spring, which is used to apply elastic pressure to the adsorption member 101 and the connecting plate 102 so that the adsorption member 101 and the connecting plate 102 can maintain a relative positioning state. Thus, the limiter 108 can limit the distance between the connecting plate 102 and the adsorption member 101, so that the spring remains in a compressed state, and then the spring can apply elastic pressure to the adsorption member 101 and the connecting plate 102 so that the adsorption member 101 and the connecting plate 102 can maintain a relative positioning state, thereby improving the supporting force of the adsorption device 100. Since the spring is provided on the connecting rod 105, the connecting rod 105 can provide support force to the spring, prevent the spring from being damaged due to excessive deformation, and improve the reliability of the use of the adsorption device 100. In addition, since multiple guide devices 104 are arranged at intervals along the width direction of the track member 201, the springs mounted on the connecting rod 105 are naturally also arranged at intervals along the width direction of the track member 201. This can increase the supporting force for the adsorption member 101 and the connecting plate 102, so that the connecting plate 102 and the adsorption member 101 can better maintain a relative positioning state, thereby improving the reliability of the adsorption device 100.

[0052] In this embodiment, preferably, the limiting member 108 is a limiting nut, and the connecting rod 105 is provided with a threaded section, and the limiting nut is threadedly engaged with the threaded section. During the assembly process of the adsorption device 100, the connecting rod 105 can be first hinged to the adsorption member 101 through the first pin 106, and then the spring is sleeved on the connecting rod 105. The connecting plate 102 is then sleeved on the connecting rod 105 through the through-hole 107, and then the limiting nut is sleeved on the threaded section. By rotating the limiting nut, the limiting nut moves along the threaded section to press the connecting plate 102, thereby keeping the spring in a compressed state, thereby making the adsorption device 100 easy to assemble and adjust. Of course, the limiting member 108 can also be a limiting protrusion provided on the connecting rod 105.

[0053] In this embodiment, preferably, the adsorption device 100 further includes a guide wheel 109. The adsorption member 101 extends along the width direction of the track member 201. The guide wheel 109 is connected to the end of the adsorption member 101 via a second pin 110. The second pin 110 is parallel to the first pin 106. When the adsorption device 100 is connected to the track member 201 of the track device 200, the adsorption member 101 can be arranged along the width direction of the track member 201. When the track device 200 walks on a non-planar working surface, the adsorption component 101 will be subjected to pressure from the working surface. Under the action of pressure and the elastic force of the elastic component 103, the adsorption component 101 will rotate relative to the connecting plate 102 with the first pin shaft 106 as the center. During the rotation of the adsorption component 101 relative to the connecting plate 102, the guide wheel 109 will contact the working surface and slide on the working surface. At this time, the guide wheel 109 can rotate relative to the adsorption component 101 with the second pin shaft 110 as the center, which effectively avoids the end of the adsorption component 101 from directly colliding with the working surface and causing damage, and makes the movement of the crawler device 200 on the working surface smoother.

[0054] In this embodiment, preferably, the bottom surface of the adsorption member 101 is used to contact the working surface, and the bottom end of the guide wheel 109 is located below the bottom surface of the adsorption member 101, thereby reducing the friction between the adsorption member 101 and the working surface.

[0055] In this embodiment, preferably, the adsorption member 101 includes a frame 111 and a magnet 112. Both the frame 111 and the magnet 112 extend along the width direction of the track member 201. The guide wheel 109 is connected to both ends of the frame 111 via a second pin 110. The magnet 112 is connected to the frame 111 and is located between the two ends of the frame 111. The magnet 112 is used to be adsorbed on the work surface. As a result, the adsorption member 101 has a simple structure, reliable adsorption, and is easy to assemble. Of course, the magnet 112 can also be replaced by a vacuum adsorption device 100.

[0056] In the description of this specification, reference to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" 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 present invention. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless otherwise inconsistent.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0058] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A crawler device, characterized in that: include: a bracket, wherein a positioning plate and a guide rail are provided on the bracket, the guide rail extends along a first direction, and a through hole is provided on the positioning plate; a driving wheel, rotatably connected to the bracket via a driving wheel shaft, wherein the driving wheel shaft is arranged along a second direction, and the second direction is perpendicular to the first direction; A driven wheel is rotatably connected to the bracket via a driven wheel shaft, wherein the driven wheel shaft is parallel to the driving wheel shaft and is slidably arranged on the guide rail; A crawler member is sleeved on the outside of the driving wheel and the driven wheel and meshes with the driving wheel and the driven wheel; The tensioning device includes a connecting rod and a positioning member, wherein the connecting rod is arranged parallel to the guide rail, one end of the connecting rod is connected to the driven wheel shaft, the connecting rod is inserted into the through hole, the driven wheel shaft can slide along the guide rail to adjust the distance between the driven wheel shaft and the driving wheel shaft and drive the connecting rod to move in the through hole, and the positioning member is used to be connected between the connecting rod and the positioning plate to position the connecting rod relative to the positioning plate, thereby positioning the driven wheel shaft relative to the positioning plate; The connecting rod is a screw rod, and the positioning member includes a first positioning nut and a second positioning nut. The first positioning nut and the second positioning nut are sleeved on the screw rod and threadedly connected to the screw rod. The positioning plate is located between the first positioning nut and the second positioning nut. The first positioning nut and the second positioning nut can cooperate to clamp the positioning plate so that the screw rod and the positioning plate are relatively positioned.

2. The crawler device according to claim 1, characterized in that: The guide rail is a guide shaft connected to the positioning plate. A connecting hole is provided on the driven wheel shaft. The driven wheel shaft passes through the connecting hole and is arranged on the guide shaft. The driven wheel shaft can slide along the guide shaft.

3. The crawler device according to claim 2, characterized in that: The axes of the guide shaft, connecting rod, driving wheel shaft and driven wheel shaft are coplanar, there are two tensioning devices, the connecting rods of the two tensioning devices are spaced apart in the second direction, and the guide shaft is located between the connecting rods of the two tensioning devices.

4. The crawler device according to claim 3, characterized in that: There are two guide shafts, and the two guide shafts are spaced apart in the second direction.

5. The crawler device according to claim 1, characterized in that: The bracket includes a top plate and a bottom plate, the top plate and the bottom plate are parallel and extend along a first direction, the top plate and the bottom plate are spaced apart in a third direction, the third direction is perpendicular to the first direction and the second direction, the positioning plate is clamped between the top plate and the bottom plate and extends along the third direction and the second direction, and the tensioning device is located between the top plate and the bottom plate.

6. The crawler device according to claim 5, characterized in that: It also includes a motor, which is connected to the bracket and clamped between the top plate and the bottom plate. The output end of the motor is connected to the driving wheel shaft to drive the driving wheel shaft to rotate so as to drive the driving wheel to rotate.

7. The crawler device according to claim 6, characterized in that: Also included are protective covers located on both sides of the bracket; The top plate includes a top plate body and a first wing plate, wherein the first wing plate is protruded from both sides of the top plate body, the first wing plate extends along the first direction and the second direction and is located between the two ends of the top plate body, and the first wing plate is connected to the protective cover; The base plate includes a base plate body and a second wing plate. The second wing plate is protruded from both sides of the base plate body. The second wing plate extends along the first direction and the second direction and is located between the two ends of the base plate body. The second wing plate is connected to the protective cover.

8. The crawler device according to claim 7, characterized in that: It also includes a motor mounting plate, which is connected between the first wing plate and the second wing plate located on the same side of the top plate and the bottom plate and extends along the first direction and the third direction. An accommodating cavity is formed between the top plate, the bottom plate and the motor mounting plate, and the motor is located in the accommodating cavity and connected to the motor mounting plate.

9. The crawler device according to any one of claims 1 to 8, characterized in that: The device further comprises an adsorption device, the adsorption device comprising an adsorption member, a connecting plate, and an elastic member, the adsorption member being adapted to be adsorbed on a work surface, the two ends of the elastic member being connected to the adsorption member and the connecting plate, respectively, the elastic member being supported between the connecting plate and the adsorption member so as to maintain a relative positioning state between the connecting plate and the adsorption member; The track member is provided with a connecting portion, the connecting portion is connected to the connecting plate, and the elastic member extends along the radial direction of the track member so that the adsorption member is located outside the track member; There are a plurality of adsorption devices, which are arranged at intervals along the circumference of the track member, and each of the adsorption devices is arranged along the width direction of the track member.

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