Crawler chassis

Abstract

The invention provides a crawler chassis which comprises a rack, two horizontal adjusting mechanisms and two crawler units, each crawler unit is connected with the rack through one horizontal adjusting mechanism, and each crawler unit comprises a crawler, a crawler support, a tensioning wheel assembly, a thrust wheel assembly, a driving wheel and a riding wheel. The tensioning wheel assembly comprises a first buffering assembly, a first connecting frame and a tensioning wheel. The thrust wheel assembly comprises a second buffering assembly, two second connecting frames and a thrust wheel. In this way, when the crawler chassis encounters a slope in the running process, the front end of the crawler chassis is pressed through the tensioning wheel assembly to adjust the contact face in a self-adaptive mode and is matched with the first buffering assembly for vibration reduction, and meanwhile the thrust wheel assembly adapts to the slope surface when passing through the slope and is matched with the second connecting frame to compress towards the middle to be combined with the second buffering assembly for vibration reduction; therefore, the adaptive capacity of the crawler chassis to the rugged road surface is greatly improved, and meanwhile vibration is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of crawler equipment, in particular to a crawler chassis. Background Art

[0002] A crawler chassis is a walking device used for mobile machinery to move on various terrains. In large agricultural machinery, crawler chassis are often used to reduce soil compaction and provide better traction and stability.

[0003] When the crawler chassis in the prior art encounters a rough road surface during driving, the crawler track deforms greatly and has poor adaptability during movement, which makes driving more difficult, increases fuel consumption, increases costs, and also generates greater vibrations, affecting the driver.

[0004] In view of this, it is necessary to propose a crawler chassis to solve or at least alleviate the above-mentioned defects. Summary of the invention

[0005] The main purpose of the present invention is to provide a crawler chassis to solve the problem that the crawler chassis in the prior art has poor adaptability on rough roads and is prone to generate large vibrations.

[0006] To achieve the above object, the present invention provides a crawler chassis, comprising a frame, two level adjustment mechanisms, and two crawler units disposed laterally opposite to each other on both sides of the frame, each crawler unit being connected to the frame via one of the level adjustment mechanisms; wherein:

[0007] Each of the crawler units comprises a crawler, a crawler bracket, a tensioning wheel assembly, a supporting wheel assembly, a driving wheel and a supporting wheel, one end of the horizontal adjustment mechanism is hinged to the frame, the other end of the horizontal adjustment mechanism is hinged to the crawler bracket, and the horizontal adjustment mechanism itself is telescopically arranged;

[0008] The tension wheel assembly comprises a first buffer assembly, a first connecting frame and a tension wheel, wherein the first connecting frame is hinged to the front end of the track frame, the tension wheel is rotatably connected to the first connecting frame, one end of the first buffer assembly is connected to the track frame, and the other end of the first buffer assembly is connected to the first connecting frame;

[0009] The supporting roller assembly includes a second buffer assembly, two second connecting frames and supporting rollers, the middle parts of the two second connecting frames are hinged to the middle bottom end of the track frame, the bottom end of each second connecting frame is connected to the supporting roller that can be rotatably arranged, and the second buffer assembly is connected between the top ends of the two second connecting frames;

[0010] The driving wheel is rotatably connected to the rear end of the track bracket, the supporting wheel is rotatably connected to the top end of the track bracket, and the inner side of the track is meshed and connected with the tensioning wheel, the supporting wheel, the driving wheel and the supporting wheel.

[0011] Preferably, each of the second connecting frames is bent, and the middle parts of the two second connecting frames are hinged together to form an X shape.

[0012] Preferably, the first connecting frame is arranged to be inclined forward from the bottom end toward the top end.

[0013] Preferably, each of the horizontal adjustment mechanisms includes a driving assembly and a first connecting arm, wherein the first connecting arm is provided with an ear plate protruding from one side close to the driving assembly, the driving assembly is obliquely arranged between the frame and the ear plate, one end of the driving assembly is hinged to the middle part of the frame, the other end of the driving assembly is hinged to the ear plate, one end of the first connecting arm is hinged to one side of the frame, and the other end of the first connecting arm is hinged to the inner side of the front end of the crawler bracket.

[0014] Preferably, the tensioning wheel includes a tensioning main wheel and a tensioning secondary wheel, and both sides of the high end of the first connecting frame are connected to the rotatable tensioning main wheel, and both sides of the low end of the first connecting frame are connected to the rotatable tensioning secondary wheel.

[0015] Preferably, the wheel diameter of the tensioning main wheel is larger than the wheel diameter of the tensioning secondary wheel.

[0016] Preferably, each of the supporting wheels comprises a wheel frame and four bottom wheels, the bottom end of the second connecting frame is hinged to the middle of the wheel frame, and the four bottom wheels are distributed and connected to the four sides of the wheel frame in a matrix arrangement.

[0017] Preferably, it further comprises two second connecting arms which are arranged opposite to each other in the transverse direction, one end of the second connecting arm is hinged to the rear end of the frame, and the other end of the second connecting arm is hinged to the inner side of the middle part of the crawler support.

[0018] Preferably, both the first buffer assembly and the second buffer assembly adopt dampers.

[0019] Preferably, the driving assembly adopts a hydraulic cylinder.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] A crawler chassis provided by the present invention comprises a frame, two horizontal adjustment mechanisms and two crawler units arranged on both sides of the frame opposite to each other in the transverse direction, each crawler unit is connected to the frame through a horizontal adjustment mechanism, each crawler unit comprises a crawler, a crawler frame, a tensioning wheel assembly, a supporting wheel assembly, a driving wheel and a supporting wheel, the tensioning wheel assembly comprises a first buffer assembly, a first connecting frame and a tensioning wheel, the first connecting frame is hinged to the front end of the crawler frame, the supporting wheel assembly comprises a second buffer assembly, two second connecting frames and supporting wheels, the middle parts of the two second connecting frames are hinged to the middle bottom end of the crawler frame, and the inner side of the crawler is meshed and connected with the tensioning wheel, the supporting wheel, the driving wheel and the supporting wheel. In this way, when the crawler chassis encounters a slope during driving, the front end is first compressed by the tensioning wheel assembly, and the contact surface can be adaptively adjusted to the slope with the cooperation of the hinge, and vibration is reduced with the cooperation of the first buffer assembly. At the same time, the supporting wheel assembly in the middle of the bottom adapts to the slope when passing through the slope, and is compressed toward the middle by two oppositely arranged second connecting frames to cooperate with the second buffer assembly for vibration reduction, thereby greatly improving the adaptability of the crawler chassis to rugged roads and greatly reducing vibration. At the same time, a horizontal adjustment mechanism is provided to adjust the spacing between the crawler units, further increasing the adaptability and adjustment ability in the horizontal direction and improving the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 It is a three-dimensional schematic diagram of the overall structure of one embodiment of the present invention;

[0024] Figure 2 A side view schematic diagram of the overall structure of an embodiment of the present invention;

[0025] Figure 3 It is a schematic plan view of adjusting the horizontal position of the crawler unit in one embodiment of the present invention.

[0026] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

[0027] Description of Figure Numbers:

[0028] 10. Track unit; 110. Track; 120. Track bracket; 130. Tensioning wheel assembly; 131. First buffer assembly; 132. First connecting frame; 133. Tensioning wheel; 1331. Tensioning main wheel; 1332. Tensioning secondary wheel; 140. Supporting wheel assembly; 141. Second buffer assembly; 142. Second connecting frame; 143. Supporting wheel; 1431. Wheel frame; 1432. Bottom wheel; 150. Driving wheel; 160. Supporting wheel; 20. Horizontal adjustment mechanism; 210. Driving assembly; 220. First connecting arm; 221. Ear plate; 230. Second connecting arm; 30. Frame. DETAILED DESCRIPTION

[0029] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] Please see attached Figure 1-3In one embodiment of the present invention, a crawler chassis includes a frame 30, two horizontal adjustment mechanisms 20, and two crawler units 10 arranged on both sides of the frame 30 in a horizontal direction, and each crawler unit 10 is connected to the frame 30 through a horizontal adjustment mechanism 20. First of all, it should be noted that the horizontal direction in the present application refers to the width direction along the frame 30, the front end refers to the travel direction along the crawler chassis, and the rear end refers to the tail of the travel path; which is different from the crawler chassis in the prior art. When encountering a rough road surface during driving, the crawler deformation is large, and the adaptability during movement is very poor, which makes driving more difficult, increases fuel consumption performance, and increases costs. It also produces large vibrations, which affects the driver. The present application solves the above-mentioned defects in the prior art by setting up a crawler chassis, as follows:

[0034] Each of the track units 10 includes a track 110, a track frame 120, a tensioning wheel assembly 130, a supporting wheel assembly 140, a driving wheel 150 and a supporting wheel 160. One end of the horizontal adjustment mechanism 20 is hinged to the frame 30, and the other end of the horizontal adjustment mechanism 20 is hinged to the track frame 120, and the horizontal adjustment mechanism 20 itself is telescopically arranged; the tensioning wheel assembly 130 includes a first buffer assembly 131, a first connecting frame 132 and a tensioning wheel 133, the first connecting frame 132 is hinged to the front end of the track frame 120, the tensioning wheel 133 is rotatably connected to the first connecting frame 132, one end of the first buffer assembly 131 is connected to the track frame 120, and the other end of the first buffer assembly 131 is hinged to the front end of the track frame 120. One end is connected to the first connecting frame 132; the supporting wheel assembly 140 includes a second buffer assembly 141, two second connecting frames 142 and a supporting wheel 143, the middle parts of the two second connecting frames 142 are hinged to the middle bottom end of the track bracket 120, the bottom end of each second connecting frame 142 is connected to the supporting wheel 143 which is rotatably arranged, and the second buffer assembly 141 is connected between the top ends of the two second connecting frames 142; the driving wheel 150 is rotatably connected to the rear end of the track bracket 120, the supporting wheel 160 is rotatably connected to the top end of the track bracket 120, and the inner side of the crawler 110 is meshed and connected with the tensioning wheel 133, the supporting wheel 143, the driving wheel 150, and the supporting wheel 160.

[0035] Specifically, the crawler chassis in the present application includes a frame 30, two horizontal adjustment mechanisms 20 and two crawler units 10. The frame 30 is used for installing the two crawler units 10. The two crawler units 10 are relatively arranged on both sides of the frame 30. The horizontal adjustment mechanism 20 is used to adjust the distance between the two crawler units 10 and the position of the travel direction. Therefore, the horizontal adjustment mechanism 20 itself is telescopically adjustable to adjust the horizontal position of the crawler unit 10 by telescoping. One end of the horizontal adjustment mechanism 20 is hinged to the frame 30, so that it can adapt to small rotation changes during telescopic adjustment through a hinged manner to avoid structural damage caused by rigid connection. Therefore, each crawler unit 10 is connected with a horizontal adjustment mechanism 20.

[0036] Each of the track units 10 includes a track 110, a track bracket 120, a tensioning wheel assembly 130, a supporting wheel assembly 140, a driving wheel 150 and a supporting wheel 160. The track bracket 120 is used for installation of each track wheel, so the horizontal adjustment mechanism 20 is directly connected to the track bracket 120 for telescopic adjustment when connected. The tensioning wheel assembly 130 is used as the front track wheel, so it is installed at the front end as the track wheel that first contacts the slope. It includes a first buffer assembly 131, a first connecting frame 132 and a tensioning wheel 133. The first connecting frame 132 is used for the tensioning wheel 133 Installation, the first buffer component 131 is used for vibration reduction. When the tensioning wheel 133 is pressed to the slope surface, since the first connecting frame 132 is hinged to the front end of the track bracket 120, the tensioning wheel 133 follows the first connecting frame 132 to adapt to the slope surface and rotate to an angle parallel to the slope surface. After being pressed against the slope surface, since the first buffer component 131 is connected to the track bracket 120 and the first connecting frame 132, the pressure is transmitted to the first buffer component 131, which absorbs energy to achieve the effect of vibration reduction. In the present application as a preferred embodiment, the first buffer component 131 adopts a damper.

[0037] Preferably, the supporting wheel assembly 140 serves as the track wheel in the middle of the bottom end, bears most of the pressure generated during driving and supports the weight of the machine, and includes a second buffer assembly 141, two second connecting frames 142 and supporting wheels 143. The second connecting frames 142 are used for installing the supporting wheels 143, so that each of the bottom ends of the second connecting frames 142 is connected to a supporting wheel 143, and the two second connecting frames 142 are hinged in the middle. When the bottom passes through a rugged slope, the two hinged second connecting frames 142 are inclined parallel to the uphill and downhill slopes respectively and apply pressure to the middle. At this time, the second buffer assembly 141 connected to the top of the two second connecting frames 142 is squeezed to buffer and absorb energy to achieve a vibration reduction effect. Similar to the first buffer assembly 131, the second buffer assembly 141 can also use a damper, which has a better vibration reduction effect and a compact structure for easy installation.

[0038] Furthermore, the driving wheel 150 serves as the rear track wheel, which is rotatably connected to the rear end of the track bracket 120 for transmitting power and serving as rear drive; and the supporting wheel 160 serves as the top track wheel, which is rotatably connected to the top end of the track bracket 120 for supporting the upper half of the track 110 to prevent the track 110 from sagging, and also to reduce swinging and improve stability. In this way, all the track wheels are meshed with the inner side of the track 110 to form a track unit 10, which can adapt to various road surfaces and slopes, has good adaptability, and has better vibration reduction effect.

[0039] As a preferred embodiment of the present invention, each of the second connecting frames 142 is bent, and the middle portions of the two second connecting frames 142 are hinged together to form an X shape.

[0040] It should be noted that the two second connecting frames 142 are respectively bent in a relatively “>” shape and a “<” shape, so as to form an X shape after being hinged in the middle. In this way, after the supporting wheels 143 at the bottom of the two second connecting frames 142 are compressed, they shrink toward the middle, and the second buffer assembly 141 connected between the top ends of the two second connecting frames 142 also shrinks toward the middle. This structural form is more convenient to cooperate with the damper, especially the track wheel part that serves as the bottom force-bearing body, so as to reduce vibration under the action of the damper.

[0041] As a preferred embodiment of the present invention, the first connecting frame 132 is tilted forward from the bottom end to the top end.

[0042] It should be noted that the tension wheel assembly 130 is the first to contact the slope of the rugged road section at the front end, so it is preset in an inclined form to better contact the slope of the rugged road section and improve the adaptability of the structure.

[0043] As a preferred embodiment of the present invention, each of the horizontal adjustment mechanisms 20 includes a driving component 210 and a first connecting arm 220, wherein the first connecting arm 220 is protrudingly provided with an ear plate 221 on one side close to the driving component 210, and the driving component 210 is obliquely arranged between the frame 30 and the ear plate 221, one end of the driving component 210 is hinged to the middle part of the frame 30, and the other end of the driving component 210 is hinged to the ear plate 221, one end of the first connecting arm 220 is hinged to one side of the frame 30, and the other end of the first connecting arm 220 is hinged to the inner side of the front end of the crawler bracket 120.

[0044] It is worth mentioning that the driving assembly 210 is used to drive the first connecting arm 220 to move. In the present application as a preferred embodiment, the driving assembly 210 can adopt a hydraulic cylinder, which is a more commonly used telescopic driving device, and the first connecting arm 220 is used to connect the driving assembly 210 and the crawler bracket 120, and the ear plate 221 protruding on the inner side of the first connecting arm 220 is used for the connection of the driving assembly 210. It should be noted that the driving assembly 210 is tilted so that not only the spacing between the two crawler units 10 can be adjusted, but also the longitudinal position of the crawler unit 10 can be slightly adjusted to improve the convenience and comprehensiveness of adjustment; wherein, one end of the first connecting arm 220 is hinged to one side of the frame 30 so that the entire first connecting arm 220 rotates around it, and the other end of the first connecting arm 220 is hinged to the inner side of the front end of the crawler bracket 120 for driving and adjusting the front end of the crawler bracket 120.

[0045] Furthermore, it also includes two second connecting arms 230 arranged opposite to each other in the transverse direction. The second connecting arms 230 are used to keep the entire track unit 10 from shifting during horizontal driving, so that the rear end maintains consistency with the front end when moving. Therefore, one end of the second connecting arm 230 is hinged to the rear end of the frame 30, and the other end of the second connecting arm 230 is hinged to the inner side of the middle part of the track bracket 120.

[0046] As a preferred embodiment of the present invention, the tensioning wheel 133 includes a tensioning main wheel 1331 and a tensioning secondary wheel 1332, and both sides of the high end of the first connecting frame 132 are connected with the rotatable tensioning main wheel 1331, and both sides of the low end of the first connecting frame 132 are connected with the rotatable tensioning secondary wheel 1332.

[0047] It is worth noting that a structure in which a main wheel and a secondary wheel are matched is adopted, and both the tensioning main wheel 1331 and the tensioning secondary wheel 1332 are in the form of a group of two to increase the contact area between the front end and the cross section and disperse the pressure.

[0048] Furthermore, the wheel diameter of the tensioning main wheel 1331 is greater than the wheel diameter of the tensioning secondary wheel 1332 .

[0049] It should be noted that since the first connecting frame 132 is arranged at an angle, the high end contacts the slope first. Therefore, the wheel diameter of the tensioning main wheel 1331 at the high end is increased to increase the contact area, so as to disperse greater pressure, reduce resistance, and further enhance driving stability.

[0050] Furthermore, each of the supporting wheels 143 includes a wheel frame 1431 and four bottom wheels 1432, the bottom end of the second connecting frame 142 is hinged to the middle of the wheel frame 1431, and the four bottom wheels 1432 are distributed and connected to the four sides of the wheel frame 1431 in a matrix arrangement.

[0051] It should be understood that the wheel frame 1431 is used for installing the bottom wheel 1432 and is connected to the bottom end of the second connecting frame 142. Each of the wheel frames 1431 adopts a matrix distribution of four bottom wheels 1432 to increase the contact area with the ground, thereby reducing pressure and resistance and improving stability.

[0052] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A crawler chassis, characterized in that: It comprises a frame, two level adjustment mechanisms and two track units arranged on both sides of the frame in a transverse direction, each of the track units is connected to the frame through one of the level adjustment mechanisms; wherein, Each of the crawler units comprises a crawler, a crawler bracket, a tensioning wheel assembly, a supporting wheel assembly, a driving wheel and a supporting wheel, one end of the horizontal adjustment mechanism is hinged to the frame, the other end of the horizontal adjustment mechanism is hinged to the crawler bracket, and the horizontal adjustment mechanism itself is telescopically arranged; The tension wheel assembly comprises a first buffer assembly, a first connecting frame and a tension wheel, wherein the first connecting frame is hinged to the front end of the track frame, the tension wheel is rotatably connected to the first connecting frame, one end of the first buffer assembly is connected to the track frame, and the other end of the first buffer assembly is connected to the first connecting frame; The supporting roller assembly includes a second buffer assembly, two second connecting frames and supporting rollers, the middle parts of the two second connecting frames are hinged to the middle bottom end of the track frame, the bottom end of each second connecting frame is connected to the supporting roller that can be rotatably arranged, and the second buffer assembly is connected between the top ends of the two second connecting frames; The driving wheel is rotatably connected to the rear end of the track bracket, the supporting wheel is rotatably connected to the top end of the track bracket, and the inner side of the track is meshed and connected with the tensioning wheel, the supporting wheel, the driving wheel and the supporting wheel.

2. The crawler chassis according to claim 1, characterized in that: Each of the second connecting frames is bent, and the middle parts of the two second connecting frames are hinged together to form an X shape.

3. The crawler chassis according to claim 1, characterized in that: The first connecting frame is arranged to tilt forward from the bottom end toward the top end.

4. The crawler chassis according to claim 1, characterized in that: Each of the horizontal adjustment mechanisms includes a driving assembly and a first connecting arm, wherein the first connecting arm is provided with an ear plate protruding from one side close to the driving assembly, the driving assembly is obliquely arranged between the frame and the ear plate, one end of the driving assembly is hinged to the middle part of the frame, and the other end of the driving assembly is hinged to the ear plate, one end of the first connecting arm is hinged to one side of the frame, and the other end of the first connecting arm is hinged to the inner side of the front end of the crawler bracket.

5. The crawler chassis according to claim 3, characterized in that: The tensioning wheel includes a tensioning main wheel and a tensioning secondary wheel. Both sides of the high end of the first connecting frame are connected to the rotatable tensioning main wheel, and both sides of the low end of the first connecting frame are connected to the rotatable tensioning secondary wheel.

6. The crawler chassis according to claim 5, characterized in that: The wheel diameter of the tensioning main wheel is larger than the wheel diameter of the tensioning secondary wheel.

7. The crawler chassis according to claim 1, characterized in that: Each of the supporting wheels comprises a wheel frame and four bottom wheels. The bottom end of the second connecting frame is hinged to the middle of the wheel frame. The four bottom wheels are distributed in a matrix and connected to the four sides of the wheel frame.

8. The crawler chassis according to claim 4, characterized in that: It also includes two second connecting arms which are arranged opposite to each other in the transverse direction, one end of the second connecting arm is hinged to the rear end of the frame, and the other end of the second connecting arm is hinged to the inner side of the middle part of the crawler support.

9. The crawler chassis according to claim 1, characterized in that: The first buffer assembly and the second buffer assembly both use dampers.

10. The crawler chassis according to claim 4, characterized in that: The driving assembly adopts a hydraulic cylinder.

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