Loosening prevention structure of log grapple shaft

Abstract

The utility model relates to the technical field of log grapple, in particular to a log grapple shaft anti-loosening structure which comprises a shell. The guide sleeve is connected to the shell, and a first pin hole is formed in the guide sleeve in the radial direction of the guide sleeve; the connecting shaft is inserted into the guide sleeve, and a second pin hole is formed in the connecting shaft in the radial direction of the connecting shaft; the anti-loose pin is inserted into the first pin hole and the second pin hole at the same time and is in interference fit with the first pin hole and the second pin hole, a plurality of extrusion grooves are formed in the side wall of the anti-loose pin in the circumferential direction of the anti-loose pin, and the diameter of the anti-loose pin is larger than that of the first pin hole and that of the second pin hole; the anti-loose pin can deform through the extrusion groove so that the anti-loose pin can be inserted into the first pin hole and the second pin hole. The anti-loosening pin can enter the first pin hole and the second pin hole through deformation of the extrusion groove, the first pin hole and the second pin hole are extruded through the anti-loosening pin to form interference fit, then the anti-impact and anti-loosening purposes are achieved, the requirement of the anti-loosening pin for the precision of the pin holes is low, the anti-loosening pin can be detached and replaced, the machining difficulty is lowered, and the machining cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of wood grabbers, in particular to a wood grabber shaft anti-loosening structure. Background Art

[0002] A wood grapple is one of the working devices of an excavator. It is one of the accessories of the excavator working device that is independently designed, developed and manufactured to meet the specific working needs of the excavator.

[0003] Log grabs are divided into mechanical log grabs and rotary log grabs. Mechanical log grabs can be used without modifying the excavator pipelines and hydraulic systems, so the cost is lower; rotary log grabs need to modify the excavator pipelines and hydraulic systems to achieve the requirement of 360-degree rotation, so they are convenient and practical, but the cost is higher.

[0004] The shaft of the existing wood grab is locked by a conical pin, but since the wood grab is subjected to a lot of vibration during operation, the conical pin is easily loosened. Utility Model Content

[0005] The technical problem to be solved by the present invention is: in order to solve the technical problems in the prior art, the present invention provides a wood grabber shaft anti-loosening structure with a simple and compact structure; it solves the problems of high pin hole precision requirements, low interchangeability, and non-multiple assembly and disassembly in traditional pin-hole matching, and is adaptable to occasions with impact and vibration.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a wood grabber shaft anti-loosening structure, comprising a shell; a guide sleeve connected to the shell, the guide sleeve is provided with a first pin hole along its own radial direction; a connecting shaft, inserted into the guide sleeve, the connecting shaft is provided with a second pin hole along its own radial direction; an anti-loosening pin, inserted into the first pin hole and the second pin hole at the same time, and interference fit with the first pin hole and the second pin hole, an extrusion groove is provided on the side wall of the anti-loosening pin, and a plurality of extrusion grooves are provided along the circumference of the anti-loosening pin, the diameter of the anti-loosening pin is larger than the diameters of the first pin hole and the second pin hole, and the anti-loosening pin can be deformed by the extrusion groove so that the anti-loosening pin can be inserted into the first pin hole and the second pin hole.

[0007] The utility model provides an anti-loosening structure for the shaft of a wood grabber. During installation, the anti-loosening pin is knocked into the first pin hole and the second pin hole. The deformation of the extrusion groove enables the anti-loosening pin to enter the first pin hole and the second pin hole. The anti-loosening pin squeezes the first pin hole and the second pin hole to form an interference fit, thereby achieving the purpose of preventing impact and preventing loosening. In addition, the anti-loosening pin has low requirements on the precision of the pin holes and can be disassembled and replaced, which reduces the processing difficulty and saves processing costs.

[0008] Furthermore, the cross section of the extrusion groove is V-shaped.

[0009] Furthermore, the cross section of the extrusion groove is arc-shaped.

[0010] Furthermore, three extrusion grooves are provided along the circumferential array of the anti-loosening pin.

[0011] Furthermore, a guide portion is provided at one end of the anti-loosening pin, and a diameter of the guide portion is smaller than a diameter of the anti-loosening pin.

[0012] Furthermore, a transition cone portion is provided between the anti-loosening pin and the guide portion, the large end of the transition cone portion is connected to the anti-loosening pin, and the small end of the transition cone portion is connected to the guide portion.

[0013] Furthermore, a smooth ball portion is provided at the end of the anti-loosening pin.

[0014] Furthermore, a safety hole is provided at the end of the connecting shaft along its own axial direction, the safety hole is communicated with the second pin hole, and a safety component is provided in the safety hole to prevent the anti-loosening pin from detaching from the connecting shaft.

[0015] Furthermore, the safety assembly includes an elastic member and a card block, and a card slot for inserting the card block is provided on the side wall of the anti-loosening pin. One end of the elastic member contacts the side wall of the shell, and the other end contacts the card block.

[0016] Furthermore, the elastic member is a compression spring.

[0017] The beneficial effects of the present invention are:

[0018] 1. During installation, the anti-loosening pin is knocked into the first pin hole and the second pin hole. The deformation of the extrusion groove allows the anti-loosening pin to enter the first pin hole and the second pin hole. The anti-loosening pin squeezes the first pin hole and the second pin hole to form an interference fit, thereby achieving the purpose of anti-impact and anti-loosening. In addition, the anti-loosening pin has low requirements on the precision of the pin hole and can be disassembled and replaced, which reduces the processing difficulty and saves processing costs.

[0019] 2. The setting of the guide portion and the transition cone portion facilitates the better insertion of the anti-loosening pin into the first pin hole and the second pin hole;

[0020] 3. By setting the elastic member and the clamping block, the clamping block cooperates with the clamping slot to prevent the anti-loosening pin from being separated from the connecting shaft, thereby further ensuring the anti-loosening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 The utility model is a structural schematic diagram of an overall anti-loosening structure of a wood grab shaft.

[0023] Figure 2 It is a schematic cross-sectional view of the anti-loosening pin in the first embodiment of the present invention.

[0024] Figure 3 It is a side view schematic diagram of the anti-loosening pin in the utility model.

[0025] Figure 4 It is a schematic end face diagram showing that the cross section of the extrusion groove is V-shaped in the present invention.

[0026] Figure 5 It is a schematic end face diagram showing that the cross section of the extrusion groove is an arc in the present invention.

[0027] Figure 6 It is a side view cutaway schematic diagram of the anti-loosening pin in the second embodiment of the present invention.

[0028] In the figure: 1. Housing; 11. Guide sleeve; 111. First pin hole; 2. Connecting shaft; 21. Second pin hole; 22. Safety hole; 23. Elastic member; 24. Block; 241. Arc block; 3. Anti-loosening pin; 31. Extrusion groove; 32. Guide portion; 33. Transition cone; 34. Block. DETAILED DESCRIPTION

[0029] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] The utility model discloses a wood grabber shaft anti-loosening structure.

[0032] Example 1:

[0033] Reference Figures 1 to 3 A wood grabber shaft anti-loosening structure includes a housing 1 fixedly connected to a guide sleeve 11. The guide sleeve 11 has a first pin hole 111 defined along its radial direction. A connecting groove is inserted into the guide sleeve 11. Each set of guide sleeves 11 has two guide sleeves 11 along its axial direction. The inner hole of one guide sleeve 11 extends through the housing 1, allowing the connecting shaft 2 to be inserted into both guide sleeves simultaneously. A second pin hole 21 is defined along the connecting shaft 2 along its radial direction. The first pin hole 111 and the second pin hole 21 have the same diameter. Anti-loosening pins 3 are inserted into the first pin hole 111 and the second pin hole 21 at the same time. The anti-loosening pin 3 has an interference fit with the first pin hole 111 and the second pin hole 21. An extrusion groove 31 is provided on the side wall of the anti-loosening pin 3. There are multiple extrusion grooves 31 along the circumference of the anti-loosening pin 3. The diameter of the anti-loosening pin 3 is larger than the diameter of the first pin hole 111 and the second pin hole 21. The anti-loosening pin 3 can be deformed by the extrusion groove 31 so that the anti-loosening pin 3 can be inserted into the first pin hole 111 and the second pin hole 21, thereby realizing the interference fit of the anti-loosening pin 3 with the first pin hole 111 and the second pin hole 21.

[0034] During installation, insert the connecting shaft 2 into the guide sleeve 11, and align the first pin hole 111 and the second pin hole 21, and then knock the anti-loosening pin 3 into the first pin hole 111 and the second pin hole 21. The deformation of the extrusion groove 31 allows the anti-loosening pin 3 to enter the first pin hole 111 and the second pin hole 21, so that the anti-loosening pin 3 squeezes the first pin hole 111 and the second pin hole 21 to form an interference fit, thereby achieving the purpose of anti-impact and anti-loosening, and the anti-loosening pin 3 has low requirements on the precision of the pin holes and can be disassembled and replaced, which reduces the processing difficulty and saves processing costs.

[0035] Reference Figure 4 and Figure 5 Specifically, the cross section of the extrusion groove 31 is V-shaped. In another embodiment, the cross section of the extrusion groove 31 can also be arc-shaped. In this embodiment, three extrusion grooves 31 are provided along the circumferential array of the anti-loosening pin 3, that is, the angle between each extrusion groove 31 is 120 degrees.

[0036] More specifically, a guide portion 32 is provided at one end of the anti-loosening pin 3. The diameter of the guide portion 32 is smaller than that of the anti-loosening pin 3, allowing for better insertion into the first pin hole 111. A transition tapered portion 33 is provided between the anti-loosening pin 3 and the guide portion 32. The large end of the transition tapered portion 33 is connected to the anti-loosening pin 3, and the small end of the transition tapered portion 33 is connected to the guide portion 32. The anti-loosening pin 3, the transition tapered portion, and the guide portion 32 are integrally formed.

[0037] In addition, the end of the anti-loosening pin 3 is provided with a smooth ball portion.

[0038] Example 2:

[0039] Reference Figure 6 The difference from Example 1 is that a safety hole 22 is opened at the end of the connecting shaft 2 along its own axial direction, the safety hole 22 is connected to the second pin hole 21, and a safety component is provided in the safety hole 22 to prevent the anti-loosening pin 3 from detaching from the connecting shaft 2.

[0040] Specifically, the safety assembly includes an elastic member 23 and a block 24. A slot 34 for inserting the block 24 is provided on the side wall of the locking pin 3. When installing the locking pin 3, the guide portion 32 first enters the second pin hole 21, pressing the block 24 back into the safety hole 22. As the locking pin 3 is driven in, the slot 34 aligns with the safety hole 22. At this point, the block 24, under the action of the elastic member 23, inserts into the slot 34, preventing the locking pin 3 from moving. One end of the elastic member 23 contacts the side wall of the housing 1, and the other end contacts the block 24. The elastic member 23 can be a compression spring.

[0041] It should be noted that the end of the clamping block 24 facing the anti-loosening pin 3 is an arc block 241 . When the anti-loosening pin 3 rotates along its own circumferential direction, the clamping block 24 can be separated from the clamping slot 34 .

[0042] Working principle: During installation, the anti-loosening pin 3 is knocked into the first pin hole 111 and the second pin hole 21. The deformation of the extrusion groove 31 allows the anti-loosening pin 3 to enter the first pin hole 111 and the second pin hole 21. The anti-loosening pin 3 squeezes the first pin hole 111 and the second pin hole 21 to form an interference fit, thereby achieving the purpose of anti-impact and anti-loosening. In addition, the anti-loosening pin 3 has low requirements on the precision of the pin holes and can be disassembled and replaced, which reduces the processing difficulty and saves processing costs. The setting of the guide portion 32 and the transition cone portion 33 facilitates the anti-loosening pin 3 to be better inserted into the first pin hole 111 and the second pin hole 21. The setting of the elastic member 23 and the clamping block 24 facilitates the cooperation between the clamping block 24 and the clamping groove 34 to prevent the anti-loosening pin 3 from detaching from the connecting shaft 2, further ensuring the anti-loosening effect.

[0043] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A wood grabber shaft anti-loosening structure, characterized in that: include Housing (1); A guide sleeve (11) is connected to the housing (1), and a first pin hole (111) is provided on the guide sleeve (11) along its radial direction; A connecting shaft (2) is inserted into the guide sleeve (11), and a second pin hole (21) is provided on the connecting shaft (2) along its radial direction; An anti-loosening pin (3) is inserted into the first pin hole (111) and the second pin hole (21) at the same time, and is interference-fitted with the first pin hole (111) and the second pin hole (21). An extrusion groove (31) is provided on the side wall of the anti-loosening pin (3). A plurality of the extrusion grooves (31) are provided along the circumference of the anti-loosening pin (3). The diameter of the anti-loosening pin (3) is larger than the diameter of the first pin hole (111) and the second pin hole (21). The anti-loosening pin (3) can be deformed by the extrusion groove (31) so that the anti-loosening pin (3) is inserted into the first pin hole (111) and the second pin hole (21).

2. The anti-loosening structure of a wood grab shaft according to claim 1, characterized in that: The cross section of the extrusion groove (31) is V-shaped.

3. The anti-loosening structure of a wood grab shaft according to claim 1, characterized in that: The cross section of the extrusion groove (31) is arc-shaped.

4. The anti-loosening structure of the wood grab shaft according to claim 3, characterized in that: Three extrusion grooves (31) are arranged in a circumferential array along the anti-loosening pin (3).

5. The anti-loosening structure of a wood grab shaft according to claim 3, characterized in that: One end of the anti-loosening pin (3) is provided with a guide portion (32), and the diameter of the guide portion (32) is smaller than the diameter of the anti-loosening pin (3).

6. The anti-loosening structure of the wood grab shaft according to claim 5, characterized in that: A transition cone (33) is provided between the anti-loosening pin (3) and the guide portion (32), the large end of the transition cone (33) is connected to the anti-loosening pin (3), and the small end of the transition cone (33) is connected to the guide portion (32).

7. The anti-loosening structure of a wood grab shaft according to claim 1, characterized in that: The end of the anti-loosening pin (3) is provided with a smooth ball portion.

8. The anti-loosening structure of a wood grab shaft according to claim 1, characterized in that: The end of the connecting shaft (2) is provided with a safety hole (22) along its own axial direction, the safety hole (22) is communicated with the second pin hole (21), and a safety component is provided in the safety hole (22) to prevent the anti-loosening pin (3) from detaching from the connecting shaft (2).

9. The anti-loosening structure of a wood grab shaft according to claim 8, characterized in that: The safety assembly comprises an elastic member (23) and a clamping block (24); a clamping slot (34) for inserting the clamping block (24) is provided on the side wall of the anti-loosening pin (3); one end of the elastic member (23) contacts the side wall of the housing (1), and the other end contacts the clamping block (24).

10. The anti-loosening structure of a wood grab shaft according to claim 9, characterized in that: The elastic member (23) is a compression spring.

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