Flexible connecting arm structure of cross-country motor vehicle obstacle removing tool

Abstract

The utility model discloses a flexible connecting arm structure of a cross-country motor vehicle obstacle removing tool, which comprises a front arm assembly, a rear arm assembly, a rear arm assembly and a rear arm assembly, and the first end of the front arm assembly is used for being connected to the obstacle removing tool (such as a snow shovel, a snow plough and the like); the first end of the rear arm assembly is used for being connected to power equipment; the second end of the front arm assembly is hinged to the second end of the rear arm assembly through a connecting shaft, a torsion spring is arranged outside the connecting shaft and matched with the front arm assembly and the rear arm assembly in an abutting mode, flexible connection of the front arm assembly and the rear arm assembly is achieved through the torsion spring and the connecting shaft, and when an obstacle is encountered in the obstacle removing process, the front arm assembly is connected with the rear arm assembly through the torsion spring and the connecting shaft. The front arm can elastically twist around the connecting shaft and absorb impact energy, deformation or breakage of a rigid structure caused by instant impact is avoided, the pre-tightening force of the torsional spring can be rapidly adjusted through the matched design of the adjusting plate, the positioning clamping groove and the bolt, the overall structure does not need to be disassembled, the maintenance cost and time are reduced, and in addition, the number of parts and the assembly complexity are greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of obstacle clearing tools, and in particular to a flexible connecting arm structure for an off-road vehicle obstacle clearing tool. Background Technology

[0002] As a core component of obstacle clearing equipment, the connecting arm of obstacle clearing tools (such as snow shovels and snowplows) is connected to the power equipment via the connecting arm. It is usually necessary to connect the winch of the power equipment and the blade of the snow shovel via a steel cable. However, the connecting arm of traditional obstacle clearing tools is generally a one-piece structure. During use, the connecting arm is subjected to the upward tension of the steel cable, which can easily cause the connecting arm to bend and deform, affecting the working performance of the obstacle clearing tool.

[0003] For example, a snowplow obstacle avoidance connecting arm provided by Chinese utility model patent (authorization announcement number: CN211922473U) includes two sets of connecting components arranged opposite each other and a connecting pipe disposed between the two sets of connecting components. Each set of connecting components includes a shell, an elastic rubber block and a fixed square tube with a longitudinal cross section. The front and rear ends of the connecting pipe are respectively fixedly connected to the outer wall of the shell corresponding to the position. The elastic rubber block is elastically twisted and disposed in the shell. The fixed square tube passes through the center of the elastic rubber block in the horizontal left and right direction. The fixed square tube located on the front side is detachably fixedly connected to the rear side of the snowplow arc plate, and the fixed square tube located on the rear side is detachably fixedly connected to the snowplow bracket.

[0004] This boom has both spring and cushioning functions. The elastic rubber block of the boom can tolerate a torsion angle of ±30°. Its spring characteristics are non-linear, and its torsional stiffness increases with the load. It can withstand the multi-directional loads such as tension, compression, and shear loads on the boom during snowplow obstacle avoidance. Since the elastic rubber block is made of rubber, it can absorb vibrations. When resonating, it can reduce the amplitude and stop the vibrations that accompany the impact earlier, thus providing a cushioning function. While absorbing vibrations, it also transmits high-frequency rocking motion. The boom swings at a certain angle with the fixed square tube as the pivot, without the need for additional bearings to transmit the rocking motion.

[0005] Although the existing technology uses elastic rubber blocks to absorb vibration, it has many parts, complex assembly, and frequent maintenance, so there is an urgent need to improve the above-mentioned shortcomings. Utility Model Content

[0006] The purpose of this invention is to address the above-mentioned problems. This invention provides a flexible connecting arm structure for off-road vehicle obstacle clearing tools, which has the advantages of preventing damage to the connecting arm and having a simple structure.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a flexible connecting arm structure for an off-road vehicle obstacle clearing tool, comprising:

[0008] Forearm assembly, a first end of which is used to connect to a clearing tool;

[0009] A rear boom assembly, the first end of which is used to connect to a power unit;

[0010] The second end of the forearm assembly and the second end of the rear arm assembly are hinged by a connecting shaft. A torsion spring is provided on the outside of the connecting shaft. The torsion spring abuts against the forearm assembly and the rear arm assembly respectively to apply an elastic force to the forearm assembly and the rear arm assembly.

[0011] Preferably, the forearm assembly includes a first connecting plate, the rear arm assembly includes a second connecting plate, and the torsion spring has a first working end that abuts against the forearm assembly and a second working end that abuts against the rear arm assembly. The first working end of the torsion spring abuts against the upper surface of the first connecting plate, and the second working end of the torsion spring abuts against the upper surface of the second connecting plate.

[0012] Preferably, the upper surface of the first connecting plate is provided with an adjustment component that cooperates with the first working end of the torsion spring, the adjustment component being used to adjust the preload of the torsion spring.

[0013] Preferably, the adjusting assembly includes an adjusting plate and an adjusting bolt, the first working end of the torsion spring abuts against the adjusting plate, the adjusting bolt is threaded onto the adjusting plate, and the bottom of the adjusting bolt passes through the adjusting plate and abuts against the first connecting plate.

[0014] Preferably, the adjusting plate is provided with a positioning groove that corresponds to and cooperates with the first working end of the torsion spring, and the first working end of the torsion spring is disposed in the positioning groove.

[0015] Preferably, a fixing nut that is threadedly engaged with the adjusting bolt is fixedly connected to the adjusting plate.

[0016] Preferably, the adjusting bolt is further provided with a locking nut on its outer periphery.

[0017] Preferably, the forearm assembly further includes a forearm frame, with the first connecting plate disposed on the forearm frame, and the rear arm assembly further includes a rear arm frame, with the second connecting plate disposed on the rear arm frame.

[0018] Preferably, the forearm frame is provided with a front limiting component, the front limiting component including a first limiting plate fixed to the forearm frame, the first limiting plate having a first protrusion that abuts against the upper surface of the rear boom frame.

[0019] Preferably, the rear boom is provided with a rear limiting component, the rear limiting component including a second limiting plate fixed to the rear boom, the second limiting plate having a second protrusion that abuts against the upper surface of the forearm.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] This utility model provides a flexible connecting arm structure for an off-road vehicle obstacle clearing tool. The front arm assembly and the rear arm assembly are flexibly connected through a torsion spring and a connecting shaft. When an obstacle is encountered during obstacle clearing, the front arm can elastically twist around the connecting shaft to absorb impact energy and prevent the rigid structure from deforming or breaking due to instantaneous impact. Furthermore, the design of the adjustment plate, positioning slot and bolts allows for quick adjustment of the torsion spring preload without disassembling the overall structure, reducing maintenance costs and time. In addition, it significantly reduces the number of parts and assembly complexity. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 for Figure 1 A magnified structural diagram of A in the diagram.

[0024] Figure descriptions: 1. Clearing tool; 2. Connecting arm; 21. Forearm assembly; 211. First connecting plate; 212. Forearm frame; 22. Rear arm assembly; 221. Second connecting plate; 222. Rear frame; 3. Connecting shaft; 4. Torsion spring; 51. Adjusting plate; 511. Vertical plate; 512. Positioning slot; 52. Adjusting bolt; 53. Fixing nut; 54. Locking nut; 61. First limiting plate; 611. First protrusion; 62. Second limiting plate; 621. Second protrusion. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1-2 As shown, a flexible connecting arm structure for an off-road vehicle obstacle clearing tool includes an obstacle clearing tool 1 and a connecting arm 2. In this application, the obstacle clearing tool 1 is replaced by a snowplow, snowplow, or other tools used for obstacle clearing. The connecting arm 2 includes a front arm assembly 21 and a rear arm assembly 22. The obstacle clearing tool 1 is installed at the front end of the front arm assembly 21, and the rear end of the rear arm assembly 22 is connected to the power equipment. The front arm assembly 21 and the rear arm assembly 22 are flexibly connected.

[0027] The connecting arm 2 also includes a connecting shaft 3. The forearm assembly 21 and the rear arm assembly 22 are connected by the connecting shaft 3. Both the forearm assembly 21 and the rear arm assembly 22 rotate around the axis of the connecting shaft 3. The forearm assembly 21 includes a forearm frame 212 and a first connecting plate 211. The rear arm assembly 22 includes a rear arm frame 222 and a second connecting plate 221. A torsion spring 4 is sleeved on the outer periphery of the connecting shaft 3. The torsion spring 4 has a first working end that abuts against the forearm assembly 21 and a second working end that abuts against the rear arm assembly 22. The first working end of the torsion spring 4 abuts against the upper surface of the first connecting plate 211, and the second working end of the torsion spring 4 abuts against the upper surface of the second connecting plate 221.

[0028] More preferably, the first working end of the torsion spring 4 is provided with an adjustment component. The adjustment component is used to adjust the preload of the torsion spring 4. The adjustment component includes an adjustment plate 51 and an adjustment bolt 52. The first working end of the torsion spring 4 abuts against the adjustment plate 51. The adjustment bolt 52 is threaded onto the adjustment plate 51. The bottom of the adjustment bolt 52 passes through the adjustment plate 51 and abuts against the first connecting plate 211. By rotating the adjustment bolt 52, the adjustment plate 51 is driven to reciprocate along the axial direction of the adjustment bolt 52.

[0029] A fixing nut 53 that is threadedly engaged with the adjusting bolt 52 is fixedly installed on the adjusting plate 51. The fixing nut 53 is connected to the adjusting plate 51 by welding. A locking nut 54 is threadedly engaged on the outer circumference of the adjusting bolt 52.

[0030] The adjusting plate 51 is provided with a positioning groove 512 that corresponds to the first working end of the torsion spring 4. The first working end of the torsion spring 4 is located in the positioning groove 512, thereby preventing relative movement between the torsion spring 4 and the adjusting plate 51.

[0031] Preferably, the adjusting plate 51 is provided with a vertical plate 511, and the positioning slot 512 is provided on the vertical plate 511.

[0032] In this application, the adjusting plate 51 has upright plates 511 at both its front and rear ends, and the two upright plates 511 are integrally bent with the adjusting plate 51. Each upright plate 511 has two positioning slots 512. The first working end of the torsion spring 4 in this application is trapezoidal. The distance between the end of the first working end of the torsion spring 4 away from the connecting shaft 3 is smaller than the distance between the end closer to the connecting shaft 3. The first working end of the torsion spring 4 is engaged with the positioning slots 512, thereby preventing relative movement between the adjusting plate 51 and the torsion spring 4.

[0033] In a further optimized configuration, a limiting component is provided between the forearm assembly 21 and the rear arm assembly 22 to limit the maximum rotation angle of the forearm assembly 21 and the rear arm assembly 22. The limiting component includes a first limiting plate 61 and a second limiting plate 62. The first limiting plate 61 is fixedly installed on the forearm frame 212, and the second limiting plate 62 is fixedly installed on the rear arm frame 222. The first limiting plate 61 has a first protrusion 611, which engages with the upper surface of the rear arm frame 222. The second limiting plate 62 has a second protrusion 621, which engages with the upper surface of the forearm frame 212. When the obstacle clearing tool 1 encounters an obstacle, the forearm assembly 21 is raised so that the first protrusion 611 contacts the rear arm frame 222, limiting the maximum torsion angle.

[0034] The first limiting plate 61 and the second limiting plate 62 are provided with connecting holes for the connecting shaft 3 to pass through.

[0035] In specific operation: When the obstacle clearing tool 1 encounters an obstacle while working (such as shoveling snow, shoveling garbage, etc.), the obstacle clearing tool 1 will be lifted by the obstacle. At this time, the obstacle clearing tool 1 will drive the front boom 212 to swing upward, thereby causing the torsion spring 4 to twist. After passing the obstacle, the torsion spring 4 will return to its original position, thereby driving the obstacle clearing tool 1 and the front boom 212 to return to their original positions.

[0036] During installation: The torsion spring 4 is sleeved around the outer circumference of the connecting shaft 3, and the connecting shaft 3 is inserted into the connecting hole, so that the second working end of the torsion spring 4 abuts against the second connecting plate 221. The first working end of the torsion spring 4 is engaged in the positioning groove 512 of the adjusting plate 51, so that the lower end of the adjusting plate 51 abuts against the upper surface of the first connecting plate 211. The adjusting bolt 52 is installed into the fixing nut 53, and the bottom of the adjusting bolt 52 abuts against the first connecting plate 211. By rotating the adjusting bolt 52… This causes the adjusting plate 51 to move upward along the axial direction of the adjusting bolt 52, thereby lifting the first working end of the torsion spring 4 and thus achieving a pre-tightening effect. When the pre-tightening is in the appropriate position, the locking nut 54 is rotated to move downward, thereby making the locking nut 54 contact the fixing nut 53, thus preventing the adjusting bolt 52 from loosening. After installation, the obstacle clearing tool 1 is connected by a pull rope. Pulling up the obstacle clearing tool 1 by pulling the rope can also apply tension to the torsion spring 4, putting the torsion spring 4 in a stressed state.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flexible connecting arm structure for an off-road vehicle obstacle clearing tool, characterized in that, include: Forearm assembly (21), the first end of which is used to connect to the obstacle clearing tool (1); Rear arm assembly (22), the first end of which is used to connect to a power unit; The second end of the forearm assembly (21) and the second end of the rear arm assembly (22) are hinged by a connecting shaft (3). A torsion spring (4) is provided on the outside of the connecting shaft (3). The torsion spring (4) abuts against the forearm assembly (21) and the rear arm assembly (22) respectively to apply an elastic force to the forearm assembly (21) and the rear arm assembly (22).

2. The flexible connecting arm structure of an off-road vehicle obstacle clearing tool according to claim 1, characterized in that: The forearm assembly (21) includes a first connecting plate (211), the rear arm assembly (22) includes a second connecting plate (221), and the torsion spring (4) has a first working end that abuts against the forearm assembly (21) and a second working end that abuts against the rear arm assembly (22). The first working end of the torsion spring (4) abuts against the upper surface of the first connecting plate (211), and the second working end of the torsion spring (4) abuts against the upper surface of the second connecting plate (221).

3. The flexible connecting arm structure of an off-road vehicle obstacle clearing tool according to claim 2, characterized in that: The upper surface of the first connecting plate (211) is provided with an adjustment component that cooperates with the first working end of the torsion spring (4), and the adjustment component is used to adjust the preload of the torsion spring (4).

4. The flexible connecting arm structure of an off-road vehicle obstacle clearing tool according to claim 3, characterized in that: The adjustment assembly includes an adjustment plate (51) and an adjustment bolt (52). The first working end of the torsion spring (4) abuts against the adjustment plate (51). The adjustment bolt (52) is threaded onto the adjustment plate (51). The bottom of the adjustment bolt (52) passes through the adjustment plate (51) and abuts against the first connecting plate (211).

5. The flexible connecting arm structure of an off-road vehicle obstacle clearing tool according to claim 4, characterized in that: The adjustment plate (51) is provided with a positioning slot (512) that corresponds to the first working end of the torsion spring (4), and the first working end of the torsion spring (4) is located in the positioning slot (512).

6. The flexible connecting arm structure of an off-road vehicle obstacle clearing tool according to claim 4, characterized in that: A fixing nut (53) that is threadedly engaged with the adjusting bolt (52) is fixedly connected to the adjusting plate (51).

7. The flexible connecting arm structure of an off-road vehicle obstacle clearing tool according to claim 6, characterized in that: The adjusting bolt (52) is also provided with a locking nut (54) on its outer periphery.

8. The flexible connecting arm structure of an off-road vehicle obstacle clearing tool according to claim 2, characterized in that: The forearm assembly (21) further includes a forearm frame (212), and the first connecting plate (211) is disposed on the forearm frame (212). The rear arm assembly (22) further includes a rear arm frame (222), and the second connecting plate (221) is disposed on the rear arm frame (222).

9. The flexible connecting arm structure of an off-road vehicle obstacle clearing tool according to claim 8, characterized in that: The forearm (212) is provided with a front limiting component, which includes a first limiting plate (61) fixed to the forearm (212). The first limiting plate (61) is provided with a first protrusion (611) that abuts against the upper surface of the rear boom (222).

10. A flexible connecting arm structure for an off-road vehicle obstacle clearing tool according to claim 8 or 9, characterized in that: The rear boom (222) is provided with a rear limiting assembly, which includes a second limiting plate (62) fixed to the rear boom (222). The second limiting plate (62) is provided with a second protrusion (621) that abuts against the upper surface of the front boom (212).

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