Shaft fit clearance adjustment anti-loosening structure and excavator grab bucket
By using the locking force between the locking sleeve and the mounting sleeve in the shaft matching component, the adjustment groove makes the adjustment sleeve bend and deform, the problem of loose shaft matching component is solved and the stable work of the grab is achieved.
Patent Information
- Application Number
- CN202422115363.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-08-29
AI Technical Summary
In the prior art, the shaft fitting components are prone to loosening due to wear and external impact, which affects the normal use of the grab.
The anti-loosening structure is adjusted by shaft fitting clearance, and the locking force between the adjustment sleeve and the mounting sleeve is adjusted through the locking member. The adjustment groove is used to make the adjustment sleeve bend and deform, increasing friction to prevent loosening.
Effectively reduce the gap between the mounting shaft and the mounted part, increase friction, ensure the normal operation of the grab, and improve the earthquake relief ability.
Smart Images
Figure CN223151264U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of shaft clearance adjustment structures, in particular to an anti-loosening structure for adjusting the shaft fitting clearance and an excavator grab. Background Art
[0002] The connection between the traditional grab connection cover and the inner and outer grabs is through a pin shaft, mainly relying on the tolerance between the shaft hole for fitting, which has high requirements for the machining accuracy; at the same time, when the equipment is not used for a long time or used frequently, it is extremely easy to loosen under the influence of external force impact and vibration, which will affect the normal use of the grab and bring inconvenience to production. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is: to solve the technical problem that the parts on the shaft are prone to looseness in the prior art. The utility model provides an anti-loosening structure for adjusting the shaft fitting clearance, which has super high anti-seismic and anti-loosening ability and can adjust the tightness after loosening occurs.
[0004] The technical solution adopted by the utility model to solve its technical problem is: an anti-loosening structure for adjusting the shaft fitting clearance, including an installation shaft, on which a first conical surface is provided; an adjusting sleeve sleeved on the installation shaft, the inner wall of the adjusting sleeve is provided with a second conical surface matching with the first conical surface, and a first adjusting groove is provided on the adjusting sleeve along its own axial direction; a mounted part sleeved on the adjusting sleeve; a locking part connected with the installation shaft and in contact with the adjusting sleeve, the locking part is adapted to lock the adjusting sleeve on the installation shaft and is adapted to adjust the locking force applied to the adjusting sleeve.
[0005] In the anti-loosening structure for adjusting the shaft fitting clearance of the utility model, when looseness occurs between the mounted part and the installation shaft, the locking force between the adjusting sleeve and the installation sleeve is adjusted through the locking part, and the adjusting sleeve is bent and deformed by using the first adjusting groove to increase the friction force between the installation shaft and the adjusting sleeve, so that the mounted part can work normally.
[0006] Further, the locking part includes a locking plate and a locking bolt, the locking plate abuts against the end face of the adjusting sleeve, and the locking bolt passes through the locking plate and is threadedly connected with the installation shaft.
[0007] Further, the projection of the locking plate along the axial direction of the installation shaft is located in the inner hole of the mounted part.
[0008] Further, an installation groove is provided on the locking plate, and the large end of the locking bolt is located in the installation groove.
[0009] Further, a second adjusting groove is provided on the adjusting sleeve, and the second adjusting groove runs through the adjusting sleeve along the axial direction of the adjusting sleeve.
[0010] Further, one end of the first adjustment groove along the axial direction of the adjustment sleeve penetrates through the adjustment sleeve, and the end of the adjustment sleeve penetrated by the first adjustment groove is located at the end of the adjustment sleeve away from the locking member.
[0011] Further, a plurality of the first adjustment grooves are provided along the circumferential direction of the adjustment sleeve.
[0012] Further, the projection of the adjustment sleeve along its own radial direction is located within the installed part.
[0013] Further, both the first adjustment groove and the second adjustment groove penetrate through the adjustment sleeve along the radial direction of the adjustment sleeve.
[0014] An excavator grab includes a grab connection cover and a pin shaft, and the grab connection cover and the pin shaft are connected by using the above-mentioned shaft fit clearance adjustment and anti-loosening structure.
[0015] The beneficial effects of the present utility model are as follows:
[0016] 1. When the clearance between the installed part and the installation shaft becomes larger due to wear, the locking force between the adjustment sleeve and the installation sleeve is adjusted by the locking member, and the adjustment sleeve is bent and deformed by using the first adjustment groove, thereby reducing the clearance between the installation shaft and the installed part and increasing the friction force between the installation shaft and the installed part, so that the installed part can work normally;
[0017] 2. Through the cooperation of the first adjustment groove and the second adjustment groove, the deformation ability of the adjustment sleeve is improved, and thus the locking degree between the adjustment sleeve and the installed part is ensured;
[0018] 3. Through the arrangement of the locking plate and the locking bolt, it is convenient to adjust the tightness between the adjustment sleeve and the installed part. Description of the Drawings
[0019] The following further describes the present utility model in conjunction with the drawings and embodiments.
[0020] Figure 1 It is a schematic structural diagram showing the overall shaft fit clearance adjustment and anti-loosening structure in the present utility model.
[0021] Figure 2 It is a schematic diagram showing the adjustment sleeve in the present utility model.
[0022] In the figure: 1. Installation shaft; 11. First conical surface; 12. Threaded hole; 2. Adjustment sleeve; 21. Second conical surface; 22. First adjustment groove; 23. Second adjustment groove; 3. Locking member; 31. Locking plate; 311. Installation groove; 32. Locking bolt; 321. External thread; 4. Installed part. Detailed Embodiments
[0023] The present utility model will now be described in further detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.
[0024] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings. These are 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, 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, unless otherwise stated, the meaning of "a plurality" is two or more. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may 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 circumstances.
[0025] The present utility model discloses an anti-loosening structure for adjusting the shaft fitting clearance.
[0026] Refer to Figure 1 and Figure 2 , an anti-loosening structure for adjusting the shaft fitting clearance, comprising a mounting shaft 1, an adjusting sleeve 2, and a locking member 3. A first conical surface 11 is provided on the mounting shaft 1. The adjusting sleeve 2 is sleeved on the mounting shaft 1, and a second conical surface 21 matching the first conical surface 11 is provided on the inner wall of the adjusting sleeve 2. A first adjusting groove 22 is further provided on the adjusting sleeve 2 along its own axis. A mounted member 4 is sleeved on the adjusting sleeve 2. Part of the locking member 3 is connected to the mounting shaft 1, and the other part is in contact with the adjusting sleeve 2 so as to lock the adjusting sleeve 2 on the mounting shaft 1 and be able to adjust the locking force applied to the adjusting sleeve 2. When looseness occurs between the mounted member 4 and the mounting shaft 1, the locking force between the adjusting sleeve 2 and the mounting sleeve is adjusted through the locking member 3, and the adjusting sleeve 2 is bent and deformed by using the first adjusting groove 22 to increase the frictional force between the mounting shaft 1 and the adjusting sleeve 2 so that the mounted member 4 can work properly.
[0027] Specifically, one end of the first adjustment groove 22 along the axial direction of the adjustment sleeve 2 penetrates through the adjustment sleeve 2, and the end of the adjustment sleeve 2 penetrated by the first adjustment groove 22 is located at the end of the adjustment sleeve 2 away from the locking member 3. A plurality of first adjustment grooves 22 are provided along the circumferential direction of the adjustment sleeve 2. In this embodiment, there are 3, and the adjacent first adjustment grooves 22 are spaced 90 degrees apart. The first adjustment groove 22 can be inclined, and the inclination angle is from 0 to 30 degrees. The projection of the adjustment sleeve 2 along its own radial direction is located within the mounted member 4, so that the acting force generated by the radial deformation of the adjustment sleeve 2 acts on the mounted member 4.
[0028] The adjustment sleeve 2 is further provided with a second adjustment groove 23, and the second adjustment groove 23 penetrates through the adjustment sleeve 2 along the axial direction of the adjustment sleeve 2. Both the first adjustment groove 22 and the second adjustment groove 23 penetrate through the adjustment sleeve 2 along the radial direction of the adjustment sleeve 2, so that the adjustment sleeve 2 can bend and deform along its own radial direction, thereby facilitating the adjustment of the tightness of the mounted member 4 and ensuring the stable operation of the mounted member 4. In this embodiment, the width of the first adjustment groove 22 is; the width of the second adjustment groove 23.
[0029] According to the anti-loosening structure for adjusting the shaft fit clearance of this embodiment, the locking member 3 includes a locking plate 31 and a locking bolt 32. The locking plate 31 abuts against the end face of the adjustment sleeve 2, and the locking bolt 32 passes through the locking plate 31 and is threadedly connected to the mounting shaft 1. The projection of the locking plate 31 along the axial direction of the mounting shaft 1 is located within the inner hole of the mounted member 4, so that the locking plate 31 interferes with the mounted member 4 when locking. An installation groove 311 is provided on the end face of the locking plate 31 away from the mounting shaft 1, and the large end of the locking bolt 32 is located within the installation groove 311.
[0030] Working principle: When looseness occurs between the mounted member 4 and the mounting shaft 1, the locking force between the adjustment sleeve 2 and the mounting sleeve is adjusted through the locking member 3, and the first adjustment groove 22 is used to cause the adjustment sleeve 2 to bend and deform, so as to increase the frictional force between the mounting shaft 1 and the adjustment sleeve 2, so that the mounted member 4 can work normally.
[0031] Through the cooperation of the first adjustment groove 22 and the second adjustment groove 23, the deformation ability of the adjustment sleeve 2 is improved, and further the locking degree between the adjustment sleeve 2 and the mounted member 4 is ensured. Through the setting of the locking plate 31 and the locking bolt 32, it is convenient to adjust the tightness between the adjustment sleeve 2 and the mounted member 4.
[0032] An excavator grab includes a grab connection cover and a pin shaft. The grab connection cover and the pin shaft are connected by using the above-mentioned anti-loosening structure for adjusting the shaft fit clearance. In this embodiment, the grab connection shaft is the mounted member 4, and the pin shaft is the mounting shaft 1.
[0033] Inspired by the above ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. An anti-loosening structure for adjusting the shaft fitting clearance, characterized in that including a mounting shaft (1) provided with a first conical surface (11) thereon; an adjusting sleeve (2) sleeved on the mounting shaft (1), the inner wall of the adjusting sleeve (2) being provided with a second conical surface (21) cooperating with the first conical surface (11), and a first adjusting groove (22) being provided on the adjusting sleeve (2) along its own axial direction; a mounted member (4) sleeved on the adjusting sleeve (2); a locking member (3) connected to the mounting shaft (1) and in contact with the adjusting sleeve (2), the locking member (3) being adapted to lock the adjusting sleeve (2) on the mounting shaft (1) and to adjust the locking force applied to the adjusting sleeve (2).
2. The anti-loosening structure for adjusting the shaft fitting clearance according to claim 1, characterized in that The locking member (3) includes a locking plate (31) and a locking bolt (32), the locking plate (31) abutting against the end face of the adjusting sleeve (2), and the locking bolt (32) passing through the locking plate (31) and being threadedly connected to the mounting shaft (1).
3. The anti-loosening structure for adjusting the shaft fit clearance according to claim 2, wherein The projection of the locking plate (31) along the axial direction of the mounting shaft (1) is located within the inner hole of the mounted member (4).
4. The anti-loosening structure for adjusting the shaft fit clearance according to claim 3, characterized in that, The locking plate (31) is provided with a mounting groove (311), and the large end of the locking bolt (32) is located within the mounting groove (311).
5. The shaft fit clearance adjustment and anti-loosening structure according to claim 1, characterized in that, The adjusting sleeve (2) is provided with a second adjusting groove (23), and the second adjusting groove (23) extends through the adjusting sleeve (2) along the axial direction of the adjusting sleeve (2).
6. The anti-loosening structure for adjusting the axial mating clearance according to claim 1, characterized in that One end of the first adjusting groove (22) along the axial direction of the adjusting sleeve (2) extends through the adjusting sleeve (2), and the end of the adjusting sleeve (2) penetrated by the first adjusting groove (22) is located at the end of the adjusting sleeve (2) away from the locking member (3).
7. The shaft fitting clearance adjustment and anti-loosening structure according to claim 1, characterized in that, A plurality of the first adjusting grooves (22) are provided along the circumferential direction of the adjusting sleeve (2).
8. The shaft fitting clearance adjustment and anti-loosening structure according to claim 1, characterized in that, The projection of the adjusting sleeve (2) along its own radial direction is located within the mounted member (4).
9. The shaft fit clearance adjustment and anti-loosening structure according to claim 5, characterized in that, Both the first adjusting groove (22) and the second adjusting groove (23) extend through the adjusting sleeve (2) along the radial direction of the adjusting sleeve (2).
10. An excavator grab, characterized in that, including a grab connection cover and a pin shaft, and the grab connection cover and the pin shaft are connected by using the shaft fit clearance adjustment and anti-loosening structure according to any one of claims 1-9.