Four-wheel drive crawler wheel structure

Abstract

The utility model discloses a four-wheel drive crawler wheel structure which comprises a wheel frame, a driving wheel, a front wheel and a rear wheel, the driving wheel, the front wheel and the rear wheel are arranged on the wheel frame, a crawler belt is sleeved on the driving wheel, the front wheel and the rear wheel, the driving wheel is arranged on the upper portion of the wheel frame, the front wheel is arranged on the front portion of the wheel frame, and the rear wheel is arranged on the rear portion of the wheel frame. The lower portion of the wheel carrier is connected with a middle wheel, the middle wheel is arranged between the front wheel and the rear wheel, the lowermost portion of the circumference of the front wheel is higher than the lowermost portion of the circumference of the rear wheel, and an automatic recovery mechanism used for recovering the crawler belt is arranged at the end of the wheel carrier. The front wheel or the rear wheel is mounted on the automatic recovery mechanism and drives the crawler belt. On the basis that the design is reasonable and the structure is simple, the crawler belt can be automatically recovered and stretched when the crawler belt runs on a muddy and bumpy road, running is more facilitated, and the use requirement can be better met.

Description

Technical Field

[0001] The utility model relates to the technical field of all-terrain vehicle accessories, in particular to a four-wheel drive crawler wheel structure. Background Art

[0002] It is known that a tracked all-terrain vehicle is an amphibious multi-functional double-body special off-road vehicle used for terrains such as mountains, snow, swamps, river beaches, deserts, and gullies. Its operating environment is extremely complex and harsh. Therefore, it is required to have good cross-country passability, high maneuverability, and good seismic resistance. For currently relatively mature tracked engineering vehicles, the idler wheels and the main beam are usually rigidly connected, and strong vibrations will occur during the operation of the vehicle. Then there is also a tracked vehicle, chassis and all-terrain vehicle disclosed in the Chinese utility model patent with the authorization announcement number CN206485413U. One end of a rubber torsion spring is fixed to the beam, and the other end is connected and fixed to the rocker arm shaft. A rotating shaft for supporting the rotation of the load wheel is provided at the end of the rocker arm shaft facing away from the rubber torsion spring. The rubber torsion spring can absorb vibrations. Although such a structure can have a shock-absorbing effect during driving, for such a muddy, potholed road, the crawler cannot be well stretched during operation, so that the crawler cannot travel well, which is not conducive to normal use. Therefore, it cannot meet the use requirements and urgent improvements are needed. Summary of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] Aiming at the deficiencies in the prior art, the utility model provides a four-wheel drive crawler wheel structure, which is reasonable in design and simple in structure, and can automatically restore the stretch of the crawler when driving on a muddy, potholed road, which is more conducive to normal driving and can meet the use requirements.

[0005] (2) Technical Solutions to be Adopted

[0006] In order to achieve the above object, the technical solutions adopted by the utility model are as follows:

[0007] A four-wheel drive crawler wheel structure includes a wheel frame and a driving wheel, a front wheel and a rear wheel arranged on the wheel frame. A crawler is sleeved on the driving wheel, the front wheel and the rear wheel. The driving wheel is arranged on the upper part of the wheel frame, the front wheel is arranged on the front part of the wheel frame, and the rear wheel is arranged on the rear part of the wheel frame. A middle wheel is connected to the lower part of the wheel frame, and the middle wheel is arranged between the front wheel and the rear wheel. The lowest part of the circumference of the front wheel is higher than the lowest part of the circumference of the rear wheel. An automatic restoration mechanism for restoring the crawler is arranged at the end of the wheel frame, and the front wheel or the rear wheel is installed on the automatic restoration mechanism, and the front wheel or the rear wheel drives the crawler.

[0008] Preferably, the automatic recovery mechanism includes a moving rod disposed on the front or rear of the wheel frame. The moving rod can move back and forth on the front or rear of the wheel frame, and a transverse shaft is disposed on the moving rod. The front wheels or rear wheels are symmetrically disposed at both ends of the transverse shaft, and symmetrically arranged fixed sleeves are provided on the front or rear of the wheel frame. Symmetrically arranged fixing rods are provided on the transverse shaft. The fixing rods pass through the corresponding fixed sleeves, and a reset member is sleeved on each fixing rod. One end of the reset member abuts against one end face of the fixed sleeve, and nuts are provided at one end of each fixing rod away from the transverse shaft.

[0009] Preferably, mounting holes are provided on the front end face or the rear end face of the wheel frame, and the mounting holes are in clearance fit with the moving rod.

[0010] Preferably, each of the fixed sleeves is welded to the outer side wall of the wheel frame.

[0011] Preferably, the fixing rod includes a sleeve sleeved on the transverse shaft and a smooth rod portion integrally formed with the sleeve. The smooth rod portion passes through the fixed sleeve, and a threaded rod portion is integrally formed on the end face of the smooth rod portion. The nut is provided on the threaded rod portion.

[0012] Preferably, the connecting seat is sleeved on the transverse shaft, and a fixing hole is provided in the connecting seat. The fixing rod is inserted into the fixing hole.

[0013] Preferably, the reset member is a spring.

[0014] Preferably, the wheel frame includes a triangular bracket mainly composed of three bent pipes. The upper end of the triangular bracket is provided with a corresponding driving wheel, and the front wheels and rear wheels are respectively installed at both ends of the lower pipe of the triangular bracket. The front wheels or rear wheels are correspondingly arranged on the lower pipe of the triangular bracket through the automatic recovery mechanism, and an intermediate wheel is installed at the middle position of the lower pipe of the triangular bracket.

[0015] (III) Technical effects to be achieved

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] First, an automatic recovery mechanism for recovering the crawler is provided at the end of the wheel frame of the present invention. The front wheels or rear wheels are installed on the automatic recovery mechanism. The front wheels or rear wheels drive the crawler. On the basis of reasonable design and simple structure, it can automatically recover and stretch the crawler when driving on muddy, potholed and uneven roads, which is more conducive to operation and driving and can better meet the use requirements.

[0018] Second, the automatic recovery mechanism of the present utility model includes a moving rod arranged on the front or rear part of the wheel frame. The moving rod can move back and forth on the front or rear part of the wheel frame, and a cross shaft is arranged on the moving rod. Front wheels or rear wheels are symmetrically arranged at both ends of the cross shaft, and symmetrically arranged fixed sleeves are arranged on the front or rear part of the wheel frame. Symmetrically arranged fixed rods are arranged on the cross shaft. The fixed rods pass through the corresponding fixed sleeves, and a reset member is sleeved on each fixed rod. One end of the reset member abuts against one end face of the fixed sleeve. Nuts are arranged at one end of each fixed rod away from the cross shaft. This kind of automatic recovery mechanism is not only reasonably arranged, simple in structure, convenient for production, manufacturing and installation, but also convenient for the disassembly and installation of the fixed rod from the wheel frame and the disassembly and installation of the fixed rod from the fixed sleeve, which is beneficial to later maintenance and can better meet the use requirements. Description of the Drawings

[0019] Figure 1 Figure 6 is a front view direction schematic diagram of the front wheel of the present utility model with an automatic recovery mechanism.

[0020] Figure 2 Figure 10 is an exploded schematic diagram of the front wheel of the present utility model with an automatic recovery mechanism.

[0021] Figure 3 Figure 14 is a bottom view direction schematic diagram of the front wheel of the present utility model with an automatic recovery mechanism removing the crawler.

[0022] Figure 4 is Figure 3 the sectional view in the A-A direction in Figure 20.

[0023] Figure 5 Figure 24 is an overall schematic diagram of the front wheel of the present utility model with an automatic recovery mechanism removing the crawler.

[0024] Figure 6 Figure 28 is a structural schematic diagram of the front wheel of the present utility model with an automatic recovery mechanism removing the crawler.

[0025] Figure 7 Figure 32 is a structural schematic diagram of the automatic recovery mechanism of the present utility model.

[0026] Figure 8 Figure 36 is a front view direction schematic diagram of the rear wheel of the present utility model with an automatic recovery mechanism.

[0027] Figure 9 Figure 40 is an exploded schematic diagram of the rear wheel of the present utility model with an automatic recovery mechanism.

[0028] In the figures: 1, wheel frame; 2, driving wheel; 3, front wheel; 4, rear wheel; 5, crawler; 6, idler wheel; 7, automatic recovery mechanism; 71, moving rod; 72, cross shaft; 73, fixed sleeve; 74, fixed rod; 75, reset member; 76, nut; 741, sleeve; 742, smooth rod part; 743, threaded rod part. Detailed Embodiment

[0029] In the description of the present utility model, it should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0031] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected to" 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 a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] To make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below through the drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present utility model and do not limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0033] Embodiment 1: Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 ,Figure 6 , a four-wheel drive crawler wheel structure, including a wheel frame 1 and a driving wheel 2, a front wheel 3 and a rear wheel 4 arranged on the wheel frame 1. A crawler 5 is sleeved on the driving wheel 2, the front wheel 3 and the rear wheel 4. The crawler 5 sleeved on the wheel frame 1 envelopes the driving wheel 2, the front wheel 3 and the rear wheel 4. The driving wheel 2 is arranged at the upper part of the wheel frame 1, the front wheel 3 is arranged at the front part of the wheel frame 1, and the rear wheel 4 is arranged at the rear part of the wheel frame 1. An intermediate wheel 6 is connected to the lower part of the wheel frame 1, and the intermediate wheel 6 is arranged between the front wheel 3 and the rear wheel 4. The lowest part of the circumference of the front wheel 3 is higher than the lowest part of the circumference of the rear wheel 5. An automatic recovery mechanism 7 for recovering the crawler 5 is arranged at the end part of the wheel frame 1. The front wheel 3 (such as Figure 1 and Figure 2 ) or the rear wheel 4 (such as Figure 8 and Figure 9 ) is installed on the automatic recovery mechanism 7. The front wheel 3 or the rear wheel 4 drives the crawler 5. When in use, due to the bumpy, muddy and uneven road, the crawler 5 at the corresponding part of the front wheel 3 or the rear wheel 4 will be squeezed. In this way, the crawler 5 will also push the front wheel 3 or the rear wheel 4, and then drive the automatic recovery mechanism 7 to move towards the center side on the wheel frame 1. When the external force on the crawler 5 disappears, the automatic recovery mechanism 7 can return to its original position. Thus, the front wheel 3 or the rear wheel 4 on the automatic recovery mechanism 7 drives the corresponding crawler 5 to return to its original state. This is beneficial to make the crawler 5 move outwards and be tensioned, facilitating normal driving and meeting the user's usage requirements.

[0034] Embodiment 2: It can be described on the basis of Embodiment 1, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, the automatic recovery mechanism 7 includes a moving rod 71 disposed on the front or rear portion of the wheel carrier 1. The moving rod 71 is capable of reciprocating on the front or rear portion of the wheel carrier 1, and a transverse shaft 72 is provided on the moving rod 71. Front wheels 3 or rear wheels 4 are symmetrically arranged at both ends of the transverse shaft 72. Symmetrically arranged fixed sleeves 73 are provided on the front or rear portion of the wheel carrier 1. Symmetrically arranged fixed rods 74 are provided on the transverse shaft 72. The fixed rods 74 pass through the corresponding fixed sleeves 73, which facilitates the reciprocating movement of the fixed rods 74 in the fixed sleeves 73. A reset member 75 is sleeved on each fixed rod 74. One end of the reset member 75 abuts against one end face of the fixed sleeve 73. This facilitates the compression of the reset member 75 when the fixed rod 74 moves towards the fixed sleeve 73, and is conducive to the restoration of the position of the fixed rod 74 under the action of the resilience of the reset member 75. Furthermore, the position of the transverse shaft 72 is restored, and finally the moving rod 71 also returns to its initial position. The front wheels 3 or rear wheels 4 on the transverse shaft 72 will cause the crawler 5 to return to its normal stretched position, which is beneficial for normal driving. Nuts 76 are provided at one end of each fixed rod 74 away from the transverse shaft 72. The setting of the nuts 76 is conducive to restricting the fixed rods 74 and also helps prevent the fixed rods 74 from being easily pulled out of the fixed sleeves 73.

[0035] As Figure 4 and Figure 5 shown, wherein, in this embodiment, mounting holes are provided on the front end face or the rear end face of the wheel carrier 1. The mounting holes and the moving rod 71 are in clearance fit, which is conducive to the reciprocating movement of the moving rod 71 in the mounting holes.

[0036] As Figure 2 、 Figure 3 、 Figure 7 and Figure 9 shown, it should be noted that the fixed rod 74 includes a sleeve 741 sleeved on the transverse shaft 72 and a smooth rod portion 742 integrally formed with the sleeve 741. The smooth rod portion 742 passes through the fixed sleeve 73, and a threaded rod portion 743 is integrally formed on the end face of the smooth rod portion 742. The nut 76 is provided on the threaded rod portion 743. This is conducive to the disassembly and installation of the nut 76. The fixed rod 74 arranged in this way is conducive to being installed on the transverse shaft 72, and further conducive to the reciprocating movement of the fixed rod 74. Eventually, the reciprocating movement of the transverse shaft 72 and the moving rod 71 is realized, which is beneficial for the front wheels 3 or rear wheels 4 to drive the corresponding crawler 5 to return to its original state. This is beneficial for the crawler 5 to be tensioned when moving outwards, facilitating normal driving and meeting the user's usage requirements.

[0037] As Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 9As shown, it should be noted that the reset member 75 is a spring. This not only has a wide source, reducing the production and manufacturing costs, but also realizes that the crawler 5 can return to its original state after being subjected to an external force through the compression and elasticity of the spring.

[0038] As Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 and Figure 9 As shown, each fixed sleeve 73 is welded to the outer side wall of the wheel frame 1, and this setting is more firm.

[0039] Embodiment 3: It can be described on the basis of Embodiment 1 or Embodiment 2. As Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 9 As shown, the wheel frame 1 includes a triangular bracket, which is mainly composed of three bent pipes. A corresponding driving wheel 2 is installed at the upper end of the triangular bracket, and corresponding front wheels 3 and rear wheels 4 are installed at both ends of the lower pipe of the triangular bracket. The front wheel 3 or the rear wheel 4 is correspondingly arranged on the lower pipe of the triangular bracket through an automatic recovery mechanism 7, and an intermediate wheel 6 is installed at the middle position of the lower pipe of the triangular bracket. It should be noted that there are at least two intermediate wheels 6, and in this embodiment, three intermediate wheels 6 are used. The number of intermediate wheels 6 can be determined according to the size of the crawler 5. The intermediate wheels 6 are all arranged through through rods penetrating the lower pipe of the triangular bracket, and symmetric rollers are arranged on the through rods. The rollers are all in contact with the crawler 5. Such a setting is beneficial to the installation of the intermediate wheels 6 and also beneficial to driving the operation of the crawler 5.

[0040] When in use of the present utility model, when encountering a bumpy, muddy and uneven road, the crawler 5 at the corresponding part of the front wheel 3 or the rear wheel 4 will be squeezed, and the crawler 5 will also push the front wheel 3 or the rear wheel 4, thereby driving the cross shaft 72 to move towards the center side of the crawler 5. The cross shaft 72 will drive the moving rod 71 to move towards the center side of the crawler 5 in the mounting hole on the end face of the wheel frame 1. Synchronously, the cross shaft 72 will cause the corresponding fixed rod 74 to axially move towards the center side of the crawler 5 in the fixed sleeve 73. At the same time, the corresponding reset member 75 will be compressed at this time (one end face of the reset member 75 is in tight contact with the fixed sleeve 73). When the bumpy, muddy and uneven road stops squeezing the front wheel 3 or the rear wheel 4, the resilience of the reset member 75 drives the fixed rod 74 to axially move outward in the fixed sleeve 73 to restore to the original position, and then the fixed rod 74 will cause the cross shaft 72 to return to the original state. The cross shaft 72 will synchronously cause the front wheel 3 or the rear wheel 4 and the moving rod 71 to all return to the initial position in the mounting hole on the end face of the wheel frame 1. The front wheel 3 or the rear wheel 4 will push the crawler 5 to return to the original state, which is beneficial to normal driving. AsFigure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown in Figure 5 and Figure 6 , in the first embodiment, there is a large angle between the rear end of the lower part of the wheel frame 1 and the horizontal plane. This will also cause a large angle between the fixing rod 72 and the horizontal plane, and ultimately make it more conducive to adjusting the tension of the crawler 5, so that the crawler 5 is re-tightened, which is more conducive to driving. Among them, the front wheels 3 are two symmetrically arranged on the support rods passing through the front end of the lower part of the wheel frame 1, and the rear wheels 4 are two symmetrically arranged on the cross shaft 72. This kind of embodiment is generally placed at the front driving wheel position of the tracked all-terrain vehicle; as Figure 8 and Figure 9 As shown in Figure 8 and Figure 9 , in the second embodiment, the front end of the lower part of the wheel frame 1 is inclined to be consistent with the horizontal plane. This will make the fixing rod 72 relatively horizontal, which is more conducive to adjusting the tension of the crawler 5, so that the crawler 5 is re-tightened, which is more conducive to driving. Among them, the front wheels 3 are two symmetrically arranged on the cross shaft 72, and the rear wheels 4 are arranged on the cross bar 72 passing through the rear end of the lower part of the wheel frame 1. The rear wheels 4 are symmetrically distributed. This kind of embodiment is generally placed at the front driving wheel position of the tracked all-terrain vehicle. Combining the two can constitute a tracked all-terrain vehicle, which is conducive to adjusting the tension of the crawler 5, so that the crawler 5 is re-tightened, which is more conducive to meeting the driving requirements.

[0041] The standard parts used in this application document can all be purchased from the market. The specific connection methods of each part all adopt conventional means such as bolts and rivets that are mature in the prior art, and no specific description will be made here.

[0042] It should be noted that although the above embodiments have been described in this article, the patent protection scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, any changes and modifications made to the embodiments described in this article, or equivalent structural or equivalent process transformations made using the content of the specification and drawings of the present invention, and directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present invention.

Claims

1. A four-wheel drive crawler wheel structure, comprising a wheel frame (1), a driving wheel (2), a front wheel (3) and a rear wheel (4) arranged on the wheel frame (1). A crawler (5) is sleeved on the driving wheel (2), the front wheel (3) and the rear wheel (4). The driving wheel (2) is arranged at the upper part of the wheel frame (1), the front wheel (3) is arranged at the front part of the wheel frame (1), and the rear wheel (4) is arranged at the rear part of the wheel frame (1). A middle wheel (6) is connected to the lower part of the wheel frame (1), and the middle wheel (6) is arranged between the front wheel (3) and the rear wheel (4). The lowest part of the circumference of the front wheel (3) is higher than the lowest part of the circumference of the rear wheel (4), and it is characterized in that: An automatic recovery mechanism (7) for recovering the crawler belt (5) is provided at the end part of the wheel frame (1). The front wheel (3) or the rear wheel (4) is installed on the automatic recovery mechanism (7), and the front wheel (3) or the rear wheel (4) drives the crawler belt (5).

2. The four-wheel drive crawler wheel structure according to claim 1, characterized in that: The automatic recovery mechanism (7) includes a moving rod (71) provided on the front or rear part of the wheel frame (1). The moving rod (71) can move back and forth on the front or rear part of the wheel frame (1). A cross shaft (72) is provided on the moving rod (71). The front wheel (3) or the rear wheel (4) is symmetrically arranged at both ends of the cross shaft (72). Symmetric fixed sleeves (73) are provided on the front or rear part of the wheel frame (1). Symmetric fixed rods (74) are provided on the cross shaft (72). The fixed rods (74) pass through the corresponding fixed sleeves (73). A reset member (75) is sleeved on each fixed rod (74). One end of the reset member (75) abuts against one end face of the fixed sleeve (73). A nut (76) is provided at one end of each fixed rod (74) away from the cross shaft (72).

3. The four-wheel drive crawler wheel structure according to claim 2, wherein: An installation hole is provided on the front end face or the rear end face of the wheel frame (1). The installation hole and the moving rod (71) are in clearance fit.

4. The four-wheel drive crawler wheel structure according to claim 2, wherein: Each fixed sleeve (73) is welded to the outer side wall of the wheel frame (1).

5. The four-wheel drive crawler wheel structure according to claim 2 or 3 or 4, characterized in that: The fixed rod (74) includes a sleeve (741) sleeved on the cross shaft (72) and a smooth rod part (742) integrally formed with the sleeve (741). The smooth rod part (742) passes through the fixed sleeve (73). A threaded rod part (743) is integrally formed on the end face of the smooth rod part (742). The nut (76) is provided on the threaded rod part (743).

6. The four-wheel drive crawler wheel structure according to claim 2 or 3 or 4, characterized in that: The reset member (75) is a spring.

7. The four-wheel drive crawler wheel structure according to claim 1 or 2 or 3 or 4, characterized in that: The wheel frame (1) includes a triangular bracket, which is mainly composed of three bent pipes. The corresponding driving wheel (2) is installed at the upper end of the triangular bracket. The corresponding front wheel (3) and rear wheel (4) are installed at both ends of the lower pipe of the triangular bracket. The front wheel (3) or the rear wheel (4) is correspondingly arranged on the lower pipe of the triangular bracket through the automatic recovery mechanism (7). The middle wheel (6) is installed at the middle position of the lower pipe of the triangular bracket.

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