Protective structure

Abstract

The utility model discloses a protective structure which is used for a gear box, an external thread is arranged at the end of the gear box, and the protective structure comprises a protective cover, a limiting piece, an internal thread and a rotation stopping structure. The gear box is sleeved with the protection cover, the end of the gear box is at least partially sleeved with the limiting piece, the limiting piece makes contact with the end of the protection cover, the limiting piece comprises a rubber sleeve and a lining, a containing groove is formed in the inner wall of the rubber sleeve, and the lining is at least partially arranged in the containing groove. And the internal thread is arranged on the inner wall of the bushing and is meshed and connected with the external thread. The rotation stopping structure is arranged on the inner wall of the rubber sleeve and / or the lining and used for stopping the lining from rotating relative to the rubber sleeve. According to the protection structure in the implementation mode, the rubber sleeve can be rapidly installed on the gear box through the internal threads and the external threads, the installation time of the rubber sleeve is saved, and the rubber sleeve can be conveniently detached during follow-up maintenance.

Description

Technical Field

[0001] The utility model belongs to the technical field of gear boxes, and in particular relates to a protective structure. Background Art

[0002] After the gearbox of the power tool is produced, a protective cover needs to be installed on the outside to protect it, and a rubber cover needs to be installed on the front end of the gearbox to protect the front end of the gearbox and prevent the protective cover from falling off. However, during the installation process, the protective cover needs to be installed on the gearbox first. When installing the rubber cover, the rubber cover is easily blocked by the end of the protective cover. There is not enough distance to push the rubber cover during assembly, and the rubber cover can only be twisted hard to combine it with the gearbox. This assembly method is very time-consuming and there is also a risk that the rubber cover will not be properly assembled.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0004] The utility model aims to provide a protective structure, which can quickly install a rubber sleeve on a gear box through an internal thread and an external thread.

[0005] In order to achieve the above-mentioned purpose, a specific embodiment of the utility model provides a protective structure, which is used for a gear box, and the end of the gear box is provided with an external thread, and the protective structure includes a protective cover, a limiter, an internal thread and a rotation-stopping structure. The protective cover is sleeved on the gear box, and the limiter is at least partially sleeved on the end of the gear box and contacts the end of the protective cover. The limiter includes a rubber sleeve and a bushing, and the inner wall of the rubber sleeve is provided with a receiving groove, and the bushing is at least partially arranged in the receiving groove. The internal thread is arranged on the inner wall of the bushing and is meshed with the external thread. The rotation-stopping structure is arranged on the inner wall of the rubber sleeve and / or the bushing, and the rotation-stopping structure is used to prevent the bushing from rotating relative to the rubber sleeve.

[0006] In one or more embodiments of the present utility model, the anti-rotation structure includes a first anti-rotation portion and a second anti-rotation portion. The first anti-rotation portion is arranged on the inner wall of the rubber sleeve, and the second anti-rotation portion is arranged on the circumference of the bushing. The first anti-rotation portion cooperates with the second anti-rotation portion to prevent the bushing from rotating relative to the rubber sleeve.

[0007] In one or more embodiments of the present invention, the first stop part is a plate-like structure protruding from the inner wall of the rubber sleeve, and the second stop part is a notch-like structure. In the radial direction of the limiting member, the sizes of the first stop part and the second stop part match, so that the first stop part abuts against the second stop part.

[0008] In one or more embodiments of the present invention, in the circumferential direction of the limiting member, the inner side surface of the first anti-rotation portion and the surface of the second anti-rotation portion are both planes, and the two planes abut against each other.

[0009] In one or more embodiments of the present invention, the first anti-rotation portion abuts against the second anti-rotation portion in the axial direction of the limiting member.

[0010] In one or more embodiments of the present invention, a plurality of first anti-rotation parts are provided and are disposed around the inner wall of the rubber sleeve, and a plurality of second anti-rotation parts are provided and are disposed around the bushing.

[0011] In one or more embodiments of the present invention, four first anti-rotation parts and four second anti-rotation parts are respectively provided and are symmetrically spaced apart.

[0012] In one or more embodiments of the present invention, one end of the receiving groove extends to the end surface of the rubber sleeve, and the first anti-rotation portion is disposed in the receiving groove.

[0013] In one or more embodiments of the present invention, one end of the rubber sleeve abuts against one end of the protective cover.

[0014] In one or more embodiments of the present invention, a stopper is provided on the rubber sleeve, and the stopper abuts against the end surface of the gear box.

[0015] Compared with the prior art, the protective structure of the utility model can quickly install the rubber sleeve on the gear box through the internal thread and the external thread, which saves the installation time of the rubber sleeve and is also convenient for removing the rubber sleeve during subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only some implementations recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a three-dimensional structural diagram of a protective structure in one embodiment of the utility model;

[0018] Figure 2 This is an exploded structural diagram of a protective structure in one embodiment of the utility model;

[0019] Figure 3 This is a cross-sectional structural diagram of a protective structure in one embodiment of the utility model;

[0020] Figure 4This is a cross-sectional structural diagram of a position limiting member in one embodiment of the utility model;

[0021] Figure 5 This is a planar structural diagram of a bushing in one embodiment of the utility model;

[0022] Figure 6 This is a three-dimensional structural diagram of a bushing in one embodiment of the utility model;

[0023] Figure 7 It is a three-dimensional structural diagram of a rubber sleeve in one embodiment of the utility model.

[0024] Explanation of main figure marks: 1. gear box, 2. protective cover, 3. limit member, 31. rubber sleeve, 311. receiving groove, 312. first anti-rotation part, 313. stopping part, 32. bushing, 321. second anti-rotation part. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the implementation of the present invention will be clearly and completely described below in conjunction with the drawings in the implementation of the present invention. Obviously, the described implementation is only a part of the implementation of the present invention, not all of the implementations. Based on the implementation of the present invention, all other implementations obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] In the description of the present invention, it is necessary to understand that the terms "circumferential", "axial", "radial", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as a limitation on the present invention.

[0027] like Figures 1 to 7 As shown, the protective structure in one embodiment of the utility model is used for a gearbox 1, and an external thread is provided at the end of the gearbox 1. The protective structure includes a protective cover 2, a limiter 3, an internal thread and a rotation-stopping structure. The protective cover 2 is sleeved on the gearbox 1. The limiter 3 is at least partially sleeved on the end of the gearbox 1 and contacts with the end of the protective cover 2 to prevent the protective cover 2 from detaching from the gearbox 1. The limiter 3 includes a rubber sleeve 31 and a bushing 32. The inner wall of the rubber sleeve 31 is provided with a receiving groove 311, and the bushing 32 is at least partially provided in the receiving groove 311. The inner wall of the bushing 32 is provided with an internal thread, and the internal thread is meshed and connected with the external thread. The rotation-stopping structure is provided on the inner wall of the rubber sleeve 31 and / or the bushing 32, and the rotation-stopping structure is used to prevent the bushing 32 from rotating relative to the rubber sleeve 31.

[0028] In the above embodiment, when installing the protective cover 2 and the stopper 3, the protective cover 2 can be first sleeved on the gear box 1, and then the stopper 3 can be installed. In the process of installing the stopper 3, since an internal thread is provided on the inner wall of the bushing 32, and an external thread is correspondingly provided on the end of the gear box 1, the anti-rotation structure can fix the bushing 32 to the inner side of the rubber sleeve 31. Therefore, after aligning the rubber sleeve 31 with the end of the gear box 1, the rubber sleeve 31 can be directly screwed to install the rubber sleeve 31 and the bushing 32 on the gear box 1 together, which saves the assembly time of the stopper 3 and avoids the problem of the rubber sleeve 31 not being assembled in place. At the same time, it is also convenient to disassemble the rubber sleeve 31 when it is damaged and needs to be replaced.

[0029] In one embodiment, if Figures 4 to 7 As shown, the anti-rotation structure includes a first anti-rotation portion 312 and a second anti-rotation portion 321. The first anti-rotation portion 312 is arranged on the inner wall of the rubber sleeve 31, and the second anti-rotation portion 321 is arranged on the circumference of the bushing 32. The first anti-rotation portion 312 and the second anti-rotation portion 321 cooperate to prevent the bushing 32 from rotating relative to the rubber sleeve 31. The first anti-rotation portion 312 and the second anti-rotation portion 321 can be matched by abutting, clamping, plugging and other connection methods.

[0030] For example, when the first stop part 312 and the second stop part 321 adopt an abutting cooperation manner, the first stop part 312 can be set to a plate-like structure protruding from the inner wall of the rubber sleeve 31, and the second stop part 321 can be set to a notch-like structure. In the radial direction of the limit member 3, the sizes of the first stop part 312 and the second stop part 321 are consistent, so that the first stop part 312 abuts against the second stop part 321.

[0031] After the first anti-rotation portion 312 and the second anti-rotation portion 321 abut against each other in the circumferential direction of the rubber sleeve 31 , when the rubber sleeve 31 is twisted, the first anti-rotation portion 312 can abut against the second anti-rotation portion 321 to prevent the bushing 32 from rotating.

[0032] Furthermore, in the circumferential direction of the stopper 3, the inner side surface of the first anti-rotation portion 312 and the surface of the second anti-rotation portion 321 are both planes, and the two planes abut against each other.

[0033] In order to prevent the bushing 32 from moving along the axial direction of the limiting member 3 , the first anti-rotation portion 312 abuts against the second anti-rotation portion 321 in the axial direction of the limiting member 3 .

[0034] When the first anti-rotation portion 312 and the second anti-rotation portion 321 adopt other matching methods, the first anti-rotation portion 312 and the second anti-rotation portion 321 can be correspondingly set as connection structures such as a socket and a pin, a slot and a buckle.

[0035] In one embodiment, if Figures 5 to 7As shown, a plurality of first anti-rotation parts 312 are provided and arranged around the inner wall of the rubber sleeve 31, and a plurality of second anti-rotation parts 321 are provided and arranged around the bushing 32. In particular, four first anti-rotation parts 312 and four second anti-rotation parts 321 are provided, and the first anti-rotation parts 312 and the second anti-rotation parts 321 are equally spaced and symmetrically arranged.

[0036] like Figure 4 and Figure 7 As shown, in order to facilitate the installation of the bushing 32 on the rubber sleeve 31 and also facilitate the connection of the bushing 32 to the gear box 1 , one end of the receiving groove 311 extends to the end surface of the rubber sleeve 31 , and the first anti-rotation portion 312 is arranged in the receiving groove 311 .

[0037] In one embodiment, one end of the rubber sleeve 31 abuts against one end of the protective cover 2, thereby providing a certain thrust to the protective cover 2 in the axial direction of the protective cover 2, so that the protective cover 2 fits more closely to the gear box 1, thereby improving the connection strength between the protective cover 2 and the gear box 1, and further preventing the protective cover 2 from detaching from the gear box 1.

[0038] like Figure 3 and Figure 7 As shown, the rubber sleeve 31 is provided with a stopper 313, which can be set as an annular plate body for abutting against the end face of the gear box 1. On the one hand, it protects the end face of the gear box 1, and on the other hand, it can play a role in positioning and limiting, so that the rubber sleeve 31 can be installed in place.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A protective structure for a gear box (1), wherein the end of the gear box (1) is provided with an external thread, characterized in that: The protective structure includes: A protective cover (2) is sleeved on the gear box (1); A stopper (3) is at least partially sleeved on an end of the gear box (1) and in contact with an end of the protective cover (2), the stopper (3) comprising a rubber sleeve (31) and a bushing (32), an inner wall of the rubber sleeve (31) being provided with a receiving groove (311), and the bushing (32) being at least partially disposed in the receiving groove (311); An internal thread, provided on the inner wall of the bushing (32) and meshingly connected with the external thread; and A rotation-stop structure is provided on the inner wall of the rubber sleeve (31) and / or the bushing (32), and the rotation-stop structure is used to prevent the bushing (32) from rotating relative to the rubber sleeve (31).

2. The protective structure according to claim 1, characterized in that: The anti-rotation structure comprises a first anti-rotation portion (312) and a second anti-rotation portion (321), wherein the first anti-rotation portion (312) is arranged on the inner wall of the rubber sleeve (31), and the second anti-rotation portion (321) is arranged on the circumference of the bushing (32), and the first anti-rotation portion (312) cooperates with the second anti-rotation portion (321) to prevent the bushing (32) from rotating relative to the rubber sleeve (31).

3. The protective structure according to claim 2, characterized in that: The first stop portion (312) is a plate-like structure protruding from the inner wall of the rubber sleeve (31), and the second stop portion (321) is a notch-like structure. In the radial direction of the limiting member (3), the sizes of the first stop portion (312) and the second stop portion (321) match, so that the first stop portion (312) abuts against the second stop portion (321).

4. The protective structure according to claim 3, characterized in that: In the circumferential direction of the position-limiting member (3), the inner side surface of the first anti-rotation portion (312) and the surface of the second anti-rotation portion (321) are both planes, and the two planes abut against each other.

5. The protective structure according to claim 2, characterized in that: In the axial direction of the limiting member (3), the first anti-rotation portion (312) and the second anti-rotation portion (321) are in abutment with each other.

6. The protective structure according to claim 2, characterized in that: The first anti-rotation parts (312) are provided in plurality and are arranged around the inner wall of the rubber sleeve (31), and the second anti-rotation parts (321) are provided in plurality and are arranged around the bushing (32).

7. The protective structure according to claim 2, characterized in that: The first anti-rotation parts (312) and the second anti-rotation parts (321) are respectively provided with four and are symmetrically spaced.

8. The protective structure according to claim 2, characterized in that: One end of the receiving groove (311) extends to the end surface of the rubber sleeve (31), and the first anti-rotation portion (312) is arranged in the receiving groove (311).

9. The protective structure according to claim 1, characterized in that: One end of the rubber sleeve (31) abuts against one end of the protective cover (2).

10. The protective structure according to claim 1, characterized in that: The rubber sleeve (31) is provided with a stopper (313), and the stopper (313) abuts against the end surface of the gear box (1).

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