Driving and positioning structure of electric wrench

Abstract

The utility model relates to the technical field of electric wrenches, in particular to an electric wrench driving and positioning structure which comprises a lower face cover, the surface of the lower face cover is covered with an upper face cover, a lower abrasion-resistant ring is installed inside the lower face cover, and an upper abrasion-resistant ring is connected inside the upper face cover. The upper wear-resistant ring and the lower wear-resistant ring are connected with each other through four positioning assemblies; the positioning assembly is composed of cylindrical pins and shaft rings, the number of the shaft rings is at least four, the four shaft rings are located at the four corner positions between the adjacent upper wear-resisting ring and the lower wear-resisting ring, the upper end and the lower end of each shaft ring are attached to the upper wear-resisting ring and the lower wear-resisting ring respectively, and the cylindrical pins with the two ends penetrating through are arranged in the shaft rings. According to the electric wrench, the phenomenon that internal bolts are loosened after the electric wrench is used for a long time is avoided, the use safety of the electric wrench is improved, and the service life of the electric wrench is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of electric wrenches, in particular to a driving and positioning structure of an electric wrench. Background Technique

[0002] Generally, wear-resistant rings are installed inside electric wrenches to increase the wear resistance between the gear ring and the transmission mechanism and the face cover during rotation. However, the existing electric wrenches are fixed with bolts when installing the wear-resistant rings. Using bolts for fixation is likely to become loose due to the rotation of the gear ring and the transmission mechanism during long-term use. After the bolts become loose, they will fall off and fall into the face cover, easily jamming the gear ring and the transmission mechanism, thus affecting the rotation of the gear ring and the transmission mechanism and shortening the service life of the electric wrench. Therefore, a driving and positioning structure for an electric wrench is needed. Content of the Utility Model

[0003] The purpose of the utility model is to provide a driving and positioning structure for an electric wrench to solve the problem of easy loosening or falling of the wear-resistant ring fixed by bolts as mentioned in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A driving and positioning structure for an electric wrench, including a lower face cover, an upper face cover is covered on the surface of the lower face cover, a lower wear-resistant ring is installed inside the lower face cover, an upper wear-resistant ring is connected inside the upper face cover, and the upper wear-resistant ring and the lower wear-resistant ring are connected to each other through four positioning components; the positioning component is composed of a cylindrical pin and a shaft ring. There are at least four groups of shaft rings, and the four groups of shaft rings are located at the four corner positions between the adjacent upper wear-resistant ring and the lower wear-resistant ring. The upper and lower ends of the shaft ring are respectively attached to the upper wear-resistant ring and the lower wear-resistant ring. A cylindrical pin with both ends penetrating is arranged inside the shaft ring, and the upper and lower ends of the cylindrical pin respectively penetrate through the upper wear-resistant ring and the lower wear-resistant ring.

[0005] Preferably, cylindrical pins are installed at the four corner positions of the lower face cover, pin holes are arranged at the four corner positions of the upper face cover, and when the lower face cover and the upper face cover are covered, the cylindrical pins and the pin holes are inserted into each other for positioning.

[0006] Preferably, three groups of lower positioning holes are opened on the inner wall of the lower face cover, three groups of lower positioning pins are inlaid on the surface of the lower wear-resistant ring, and when the lower wear-resistant ring and the lower face cover are assembled, the lower positioning pins and the lower positioning holes are inserted into each other for positioning.

[0007] Preferably, several groups of fixing bolts are arranged on both sides of the surface of the lower face cover, several groups of screw holes are opened on both sides of the surface of the upper face cover, and after the lower face cover and the upper face cover are covered, they are fixed by rotating the fixing bolts and screwing them into the screw holes.

[0008] Preferably, three upper positioning holes are formed in the inner wall of the upper cover. Three upper positioning pins are inlaid on the surface of the upper wear-resistant ring. When the upper wear-resistant ring is assembled with the upper cover, the upper positioning pins and the upper positioning holes are inserted into each other for positioning.

[0009] Preferably, at least four upper insertion holes are provided on the surface of the upper cover, and at least four lower insertion holes are provided on the surface of the lower cover. After the lower cover and the upper cover are closed, the top end of the cylindrical pin is inserted into the inner part of the upper insertion hole, and the bottom end of the cylindrical pin is inserted into the inner part of the lower insertion hole.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: In the driving and positioning structure of the electric wrench, by setting a positioning component, when the positioning component is implemented, first pass the cylindrical pin through the lower wear-resistant ring and insert it into the inner part of the lower insertion hole. Then, put a collar on the surface of the cylindrical pin. After that, put the upper wear-resistant ring on the cylindrical pin, and support the upper wear-resistant ring through the collar. Then, assemble the upper wear-resistant ring and the upper cover. During the assembly, positioning is achieved by the mutual insertion of the upper positioning pin and the upper positioning hole. Finally, the lower cover and the upper cover are threadedly fixed through the fixing bolts and the pin holes under the positioning of the pin holes and the cylindrical pins; The present utility model realizes the positioning and fixing of the upper wear-resistant ring and the lower wear-resistant ring by setting the positioning component, the upper positioning pin and the lower positioning pin, solves the problem that bolts are required to fix the upper wear-resistant ring and the lower wear-resistant ring in the prior art, thereby avoiding the phenomenon of internal bolt loosening after long-term use of the electric wrench, increasing the safety during the use of the electric wrench, and also extending the service life of the electric wrench. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a three-dimensional external structure schematic diagram of the present utility model;

[0012] Figure 2 is a schematic diagram of the separated state structure of the upper cover of the present utility model;

[0013] Figure 3 is a partial exploded structure schematic diagram of the present utility model;

[0014] Figure 4 is an exploded structure schematic diagram of the inverted state of the present utility model.

[0015] In the figure: 1, lower cover; 11, cylindrical pin; 12, fixing bolt; 13, lower positioning hole; 14, lower insertion hole; 2, upper cover; 21, pin hole; 22, screw hole; 23, upper positioning hole; 24, upper insertion hole; 3, upper wear-resistant ring; 4, lower wear-resistant ring; 5, positioning component; 51, cylindrical pin; 52, collar; 6, upper positioning pin; 7, lower positioning pin. DETAILED DESCRIPTION OF THE INVENTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. In addition, the terms "first", "second", "third", "upper, lower, left, right", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. At the same time, in the description of the present utility model, unless otherwise clearly specified and limited, the terms "connected" and "connected" 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 or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0017] The structure of the driving and positioning structure of the electric wrench provided by the present utility model is as Figure 1 and Figure 3 shown, including a lower cover 1, an upper cover 2 is covered on the surface of the lower cover 1. Cylindrical pins 11 are installed at the four corner positions of the lower cover 1, and pin holes 21 are provided at the four corner positions of the upper cover 2. When the lower cover 1 and the upper cover 2 are covered, the cylindrical pins 11 and the pin holes 21 are inserted into each other to achieve positioning. A plurality of groups of fixing bolts 12 are provided on both sides of the surface of the lower cover 1, and a plurality of groups of screw holes 22 are opened on both sides of the surface of the upper cover 2. After the lower cover 1 and the upper cover 2 are covered, the lower cover 1 and the upper cover 2 are fixed by screwing the fixing bolts 12 and the screw holes 22 with each other. A lower wear-resistant ring 4 is installed inside the lower cover 1, an upper wear-resistant ring 3 is connected inside the upper cover 2, and the upper wear-resistant ring 3 and the lower wear-resistant ring 4 are connected to each other by four positioning components 5.

[0018] During implementation, the lower cover 1 and the upper cover 2 are threadedly fixed through the fixing bolts 12 and the screw holes 22 under the positioning of the pin holes 21 and the cylindrical pins 11.

[0019] Further, as Figure 2 and Figure 4 shown, the positioning component 5 is composed of a cylindrical pin 51 and a collar 52. At least four groups of collars 52 are provided. The four groups of collars 52 are located at the four corner positions between the adjacent upper wear-resistant ring 3 and the lower wear-resistant ring 4, and the upper and lower ends of the collar 52 are respectively attached to the upper wear-resistant ring 3 and the lower wear-resistant ring 4. A cylindrical pin 51 that penetrates through both ends is provided inside the collar 52, and the upper and lower ends of the cylindrical pin 51 respectively penetrate through the upper wear-resistant ring 3 and the lower wear-resistant ring 4. At least four groups of upper insertion holes 24 are provided on the surface of the upper cover 2, and at least four groups of lower insertion holes 14 are provided on the surface of the lower cover 1. After the lower cover 1 and the upper cover 2 are covered, the top end of the cylindrical pin 51 is inserted into the inside of the upper insertion hole 24, and the bottom end of the cylindrical pin 51 is inserted into the inside of the lower insertion hole 14.

[0020] During implementation, first pass the cylindrical pin 51 through the lower wear-resistant ring 4 and insert it into the inner part of the lower mating hole 14. Subsequently, slip the collar 52 over the surface of the cylindrical pin 51. Then, slip the upper wear-resistant ring 3 over the cylindrical pin 51, and support the upper wear-resistant ring 3 through the collar 52.

[0021] Furthermore, as Figure 3 and Figure 4 shown, three groups of lower positioning holes 13 are provided on the inner wall of the lower cover 1. Three groups of lower positioning pins 7 are inlaid on the surface of the lower wear-resistant ring 4. When the lower wear-resistant ring 4 and the lower cover 1 are assembled, the lower positioning pins 7 and the lower positioning holes 13 are inserted into each other to achieve positioning. Three groups of upper positioning holes 23 are provided on the inner wall of the upper cover 2. Three groups of upper positioning pins 6 are inlaid on the surface of the upper wear-resistant ring 3. When the upper wear-resistant ring 3 and the upper cover 2 are assembled, the upper positioning pins 6 and the upper positioning holes 23 are inserted into each other to achieve positioning.

[0022] During implementation, assemble the lower wear-resistant ring 4 and the lower cover 1. During assembly, achieve assembly positioning by inserting the lower positioning pins 7 and the lower positioning holes 13 into each other; assemble the upper wear-resistant ring 3 and the upper cover 2. During assembly, achieve positioning by inserting the upper positioning pins 6 and the upper positioning holes 23 into each other. Finally, thread-fix the lower cover 1 and the upper cover 2 through the fixing bolts 12 and the threaded holes 22 under the positioning of the pin holes 21 and the cylindrical pins 11.

[0023] Working principle: During use, first assemble the lower wear-resistant ring 4 and the lower cover 1. During assembly, achieve assembly positioning by inserting the lower positioning pins 7 and the lower positioning holes 13 into each other. Subsequently, position the upper wear-resistant ring 3 and the lower wear-resistant ring 4 through the positioning assembly 5. During implementation of the positioning assembly 5, first pass the cylindrical pin 51 through the lower wear-resistant ring 4 and insert it into the inner part of the lower mating hole 14. Subsequently, slip the collar 52 over the surface of the cylindrical pin 51. Then, slip the upper wear-resistant ring 3 over the cylindrical pin 51, support the upper wear-resistant ring 3 through the collar 52 and limit the distance between the two wear-resistant rings. Finally, thread-fix the lower cover 1 and the upper cover 2 through the fixing bolts 12 and the threaded holes 22 under the positioning of the pin holes 21 and the cylindrical pins 11.

[0024] The present utility model realizes the positioning and fixing work of the upper wear-resistant ring 3 and the lower wear-resistant ring 4 by setting the positioning assembly 5, the upper positioning pins 6 and the lower positioning pins 7, solves the problem in the prior art that bolts are required to fix the upper wear-resistant ring 3 and the lower wear-resistant ring 4, thereby avoiding the phenomenon of internal bolt loosening after long-term use of the electric wrench, increasing the safety during the use of the electric wrench, and also extending the service life of the electric wrench.

[0025] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. An electric wrench driving and positioning structure, comprising a lower cover (1), characterized in that: The surface of the lower cover (1) is covered with an upper cover (2), a lower wear-resistant ring (4) is installed inside the lower cover (1), an upper wear-resistant ring (3) is connected inside the upper cover (2), and the upper wear-resistant ring (3) and the lower wear-resistant ring (4) are connected to each other through four positioning components (5); the positioning components (5) are composed of cylindrical pins (51) and shaft rings (52), and the shaft rings (52) are provided with at least four groups, and the four groups of shaft rings (52) are located at four corner positions between adjacent upper wear-resistant rings (3) and lower wear-resistant rings (4), and the upper and lower ends of the shaft rings (52) are respectively fitted with the upper wear-resistant ring (3) and the lower wear-resistant ring (4), and the shaft ring (52) is provided with a cylindrical pin (51) penetrating at both ends inside, and the upper and lower ends of the cylindrical pin (51) penetrate the upper wear-resistant ring (3) and the lower wear-resistant ring (4) respectively.

2. The electric wrench driving and positioning structure according to claim 1, characterized in that: The four corners of the lower cover (1) are all provided with cylindrical pins (11), the four corners of the upper cover (2) are all provided with pin holes (21), and when the lower cover (1) and the upper cover (2) are closed, the cylindrical pins (11) and the pin holes (21) are mutually engaged to achieve positioning.

3. The electric wrench driving and positioning structure according to claim 1, characterized in that: Three groups of lower positioning holes (13) are provided on the inner wall of the lower cover (1), and three groups of lower positioning pins (7) are inlaid on the surface of the lower wear-resistant ring (4). When the lower wear-resistant ring (4) is assembled with the lower cover (1), the lower positioning pins (7) and the lower positioning holes (13) are mutually engaged to achieve positioning.

4. The electric wrench driving and positioning structure according to claim 1, characterized in that: A plurality of sets of fixing bolts (12) are arranged on both sides of the surface of the lower cover (1), a plurality of sets of screw holes (22) are opened on both sides of the surface of the upper cover (2), and after the lower cover (1) and the upper cover (2) are covered, the fixing bolts (12) and the screw holes (22) are screwed together to achieve fixation.

5. The electric wrench driving and positioning structure according to claim 1, characterized in that: Three groups of upper positioning holes (23) are provided on the inner wall of the upper cover (2), and three groups of upper positioning pins (6) are inlaid on the surface of the upper wear-resistant ring (3). When the upper wear-resistant ring (3) is assembled with the upper cover (2), the upper positioning pins (6) and the upper positioning holes (23) are mutually engaged to achieve positioning.

6. The electric wrench driving and positioning structure according to claim 1, characterized in that: The surface of the upper cover (2) is provided with at least four groups of upper plug-in holes (24), and the surface of the lower cover (1) is provided with at least four groups of lower plug-in holes (14), and when the lower cover (1) and the upper cover (2) are closed, the top end of the cylindrical pin (51) is inserted into the interior of the upper plug-in hole (24), and the bottom end of the cylindrical pin (51) is inserted into the interior of the lower plug-in hole (14).

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