Electric wrench for large screws

Abstract

The utility model discloses an electric wrench for a large screw, which belongs to the technical field of electric wrenches and is characterized by comprising an electric wrench main body, a bearing sleeve is mounted on the electric wrench main body, a linkage seat I and a linkage seat II are movably arranged in the bearing sleeve, a connecting hole is formed in the linkage seat I, and the linkage seat II is connected with the bearing sleeve. A connecting hole is formed in the bearing sleeve, a power shaft of the electric wrench body is circumferentially positioned through the connecting hole, a limiting block is detachably connected into the bearing sleeve, an output shaft is arranged on the second linkage base, the end of the output shaft penetrates through the limiting block, a spring is arranged between the second linkage base and the limiting block, the first linkage base can drive the second linkage base to rotate, and the first linkage base can push the second linkage base to the limiting block. According to the electric wrench, the counter-acting force generated when the electric wrench continues to work after a screw is tightened is reduced through the spring, and the influence of the counter-acting force generated when the electric wrench continues to work after the screw is tightened on the hand of a user is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric wrench technical field, especially relates to big screw electric wrench. BACKGROUND

[0002] In the field of industrial production and mechanical manufacturing, the limitations of traditional manual wrenches are increasingly prominent when dealing with large-scale, high-intensity fastening and disassembly operations, not only consuming time and effort, but also placing extremely high demands on workers' physical strength, and the labor intensity of workers is too large, and the production efficiency is difficult to improve, in order to improve the production efficiency, reduce the labor intensity of workers, the electric wrench emerges as the times require.

[0003] When the user holds the electric wrench to perform screw fastening operation, it is difficult to accurately know whether the screw has reached the ideal fastening state, and once the electric wrench continues to operate after the screw has been fully tightened, a strong reaction force will impact the hand, especially when using an electric wrench designed for large screws, the counter shock force is particularly significant, which may cause serious injury to the hand and even cause safety accidents. SUMMARY

[0004] The utility model aims at the above -mentioned problem existing in prior art, proposed big screw electric wrench, the technical problem that the utility model wants to solve is: how to reduce the influence of the reaction force generated by the electric wrench after tightening the screw on the user's hand.

[0005] The above technical purpose of the utility model can be realized by the following technical scheme: the electric wrench for large screws, including electric wrench main part, the electric wrench main part is installed with bearing sleeve, the bearing sleeve is movably provided with linkage seat one and linkage seat two, the linkage seat one is provided with connecting hole, the connecting hole is positioned to the power shaft of the electric wrench main part, the bearing sleeve is detachably connected with limit block, the output shaft is arranged on the linkage seat two, the end of the output shaft passes through the limit block, the spring is arranged between the linkage seat two and the limit block, the linkage seat one can drive the linkage seat two to rotate, and the linkage seat one can push the linkage seat two to the limit block, so that the linkage seat two cooperates with the limit block to extrude the spring.

[0006] In the above-mentioned electric wrench for large screws, a plurality of linkage protrusions one are arranged on the linkage seat one, and a slope one is arranged on both sides of the plurality of linkage protrusions one, a plurality of linkage protrusions two are arranged on the linkage seat two, and a slope two is arranged on both sides of the plurality of linkage protrusions two, and the slope one can abut against the slope two.

[0007] The spring is arranged outside the output shaft, and one end of the spring abuts against the end surface of the limiting block, and the other end of the spring abuts against the end surface of the linkage seat two.

[0008] In the electric wrench for large screws, the inner side wall of the bearing sleeve is provided with a limiting convex ring, the linkage seat one is provided with a limiting step, and the step surface of the limiting step abuts against the end surface of the limiting convex ring.

[0009] In the electric wrench for large screws, the linkage seat one is outwardly protruded to form a positioning part, and the positioning part is inserted into the limiting convex ring and is matched with the limiting convex ring.

[0010] In the electric wrench for large screws, the limiting block is threadedly connected in the bearing sleeve.

[0011] In the electric wrench for large screws, the bearing sleeve is threadedly connected in the electric wrench body.

[0012] In the electric wrench for large screws, the outer side wall of the bearing sleeve is provided with a positioning step, and the step surface of the positioning step abuts against the outer surface of the electric wrench body.

[0013] Compared with the prior art, the electric wrench for large screws has the beneficial effects that:

[0014] The power shaft of the electric wrench body is rotated to drive the linkage seat one to rotate, the linkage seat one drives the linkage seat two to rotate, the output shaft is rotated with the linkage seat two to realize screw tightening or loosening, and when the screw is sufficiently tightened, the linkage seat one pushes the linkage seat two to the limiting block, the linkage seat two is matched with the limiting block to press the spring, the elastic force of the spring acts on the linkage seat two, thereby reducing the reaction force generated by continuing to work after the screw is tightened, and reducing the influence of the reaction force generated by the electric wrench when continuing to work after the screw is tightened on the user's hand. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a partial sectional view of the embodiment;

[0016] Fig. 2 It is a structural schematic view of the linkage seat one of the embodiment;

[0017] Fig. 3 It is a structural schematic view of the linkage seat two and the output shaft of the embodiment;

[0018] Fig. 4 It is a structural schematic view of the embodiment.

[0019] Reference signs: 1, electric wrench main body; 2, bearing sleeve; 3, linkage seat one; 4, linkage seat two; 5, connecting hole; 6, limiting block; 7, output shaft; 8, spring; 9, linkage protrusion one; 10, inclined surface one; 11, linkage protrusion two; 12, inclined surface two; 13, limiting convex ring; 14, limiting step; 15, positioning part; 16, positioning step. DETAILED DESCRIPTION

[0020] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0021] The large electric wrench for screw, such as Figs. 1 to 4 As shown, it comprises an electric wrench main body 1, when starting, the power shaft of the electric wrench main body 1 rotates, how to drive the power shaft of the electric wrench main body 1 belongs to the prior art, and will not be described here.

[0022] The bearing sleeve 2 is installed on the electric wrench main body 1, specifically, in this embodiment, the bearing sleeve 2 is screwed in the electric wrench main body 1, so as to realize the stable connection and detachable connection of the bearing sleeve 2 and the electric wrench main body 1.

[0023] The outer side wall of the bearing sleeve 2 is provided with a positioning step 16, the step surface of the positioning step 16 abuts against the outer surface of the electric wrench main body 1, so as to limit the position of the bearing sleeve 2, the positioning step 16 can effectively ensure the stable relative position relationship between the bearing sleeve 2 and the electric wrench main body 1, and further make the assembly more convenient.

[0024] The linkage seat one 3 is movably arranged in the bearing sleeve 2, the connecting hole 5 is formed in the linkage seat one 3, the connecting hole 5 circumferentially positions the power shaft of the electric wrench main body 1, the power shaft of the electric wrench main body 1 is inserted into the connecting hole 5, specifically, in this embodiment, the connecting hole 5 is hexagonal, the end of the power shaft of the electric wrench main body 1 is adapted to the connecting hole 5, as other schemes, the connecting hole 5 can also be pentagonal or quadrangular, which is not limited here, and the end of the power shaft of the electric wrench main body 1 is adapted to the connecting hole 5.

[0025] The inner side wall of the bearing sleeve 2 is provided with a limiting convex ring 13, the limiting step 14 is arranged on the linkage seat one 3, the step surface of the limiting step 14 abuts against the end surface of the limiting convex ring 13, so as to realize the limiting of the linkage seat one 3, ensure the stable position of the linkage seat one 3 in the bearing sleeve 2, further, the positioning part 15 is formed on the linkage seat one 3 and protrudes outward, the positioning part 15 is inserted into the limiting convex ring 13 and adapted to each other, so as to further improve the stability of the linkage seat one 3 and ensure the reliability of the overall structure cooperation.

[0026] The linkage seat two 4 is movably arranged in the bearing sleeve 2, and the output shaft 7 is arranged on the linkage seat two 4.

[0027] The limiting block 6 is detachably connected in the bearing sleeve 2, and in this embodiment, the limiting block 6 is threadedly connected in the bearing sleeve 2, and the end of the output shaft 7 penetrates through the limiting block 6.

[0028] The spring 8 is arranged between the linkage seat two 4 and the limiting block 6, and the spring 8 is sleeved on the outside of the output shaft 7, one end of the spring 8 abuts against the end face of the limiting block 6, and the other end of the spring 8 abuts against the end face of the linkage seat two 4.

[0029] The linkage seat one 3 can drive the linkage seat two 4 to rotate, and the linkage seat one 3 can push the linkage seat two 4 to the limiting block 6, so that the linkage seat two 4 presses the spring 8 in cooperation with the limiting block 6.

[0030] The linkage seat one 3 is provided with a plurality of linkage protrusions one 9, the two sides of the plurality of linkage protrusions one 9 are provided with inclined surfaces one 10, the linkage seat two 4 is provided with a plurality of linkage protrusions two 11, the two sides of the plurality of linkage protrusions two 11 are provided with inclined surfaces two 12, and the inclined surfaces one 10 can abut against the inclined surfaces two 12.

[0031] That is, when the linkage seat one 3 rotates, the linkage seat two 4 is driven to rotate through the abutment of the inclined surfaces one 10 and the inclined surfaces two 12, the output shaft 7 rotates with the linkage seat two 4, so as to realize the tightening or loosening of the screw, and when the screw is sufficiently tightened, the output shaft 7 cannot continue to rotate, and the linkage seat two 4 cannot continue to rotate, so the linkage seat one 3 continues to rotate, and under the cooperation of the inclined surfaces one 10 and the inclined surfaces two 12, the linkage seat one 3 pushes the linkage seat two 4 along the bearing sleeve 2 to the limiting block 6, the linkage seat two 4 presses the spring 8 in cooperation with the limiting block 6, and the elastic force of the spring 8 directly acts on the linkage seat two 4, so as to prevent the output shaft 7 from continuing to exert force on the screw, effectively reducing the reaction force generated by the electric wrench during the continuous work after the screw is tightened, reducing the influence of the reaction force generated by the electric wrench during the continuous work after the screw is tightened on the user's hand, and emphasizing that, especially for large screws, the reaction force generated by the electric wrench during the continuous work after the screw is tightened is particularly significant, and the transmission to the user's hand can cause serious harm to the hand, so the elastic force of the spring 8 can effectively absorb and offset this part of the reaction force, not only improving the operation safety of the electric wrench, but also greatly enhancing the user's experience.

[0032] The specific embodiments described herein are merely illustrative of the spirit of the present application; those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. An electric power wrench for large screws, comprising an electric power wrench main body (1), characterized in that: The electric wrench body (1) is provided with a bearing sleeve (2), the bearing sleeve (2) is movably provided with a linkage seat one (3) and a linkage seat two (4), the linkage seat one (3) is provided with a connecting hole (5), the connecting hole (5) is positioned to the power shaft of the electric wrench body (1) in the circumferential direction, the bearing sleeve (2) is detachably connected with a limiting block (6), the linkage seat two (4) is provided with an output shaft (7), the end of the output shaft (7) penetrates the limiting block (6), the linkage seat two (4) and the limiting block (6) are provided with a spring (8), the linkage seat one (3) can drive the linkage seat two (4) to rotate, and the linkage seat one (3) can push the linkage seat two (4) to the limiting block (6), so that the linkage seat two (4) cooperates with the limiting block (6) to extrude the spring (8). The linkage seat one (3) is provided with a plurality of linkage protrusions one (9), the two sides of the plurality of linkage protrusions one (9) are provided with inclined surfaces one (10), the linkage seat two (4) is provided with a plurality of linkage protrusions two (11), the two sides of the plurality of linkage protrusions two (11) are provided with inclined surfaces two (12), the inclined surfaces one (10) can abut against the inclined surfaces two (12). The inner side wall of the bearing sleeve (2) is provided with a limiting convex ring (13), the linkage seat one (3) is provided with a limiting step (14), and the step surface of the limiting step (14) abuts against the end surface of the limiting convex ring (13).

2. The electric power wrench for large screws according to claim 1, characterized by: The spring (8) is sleeved on the outside of the output shaft (7), one end of the spring (8) abuts against the end surface of the limiting block (6), and the other end of the spring (8) abuts against the end surface of the linkage seat two (4).

3. The electric power wrench for large screws according to claim 1, characterized by: The linkage seat one (3) is outwardly protruding and forms a positioning portion (15), the positioning portion (15) is inserted into the limiting convex ring (13) and is adapted thereto.

4. The electric power wrench for large screws according to claim 1, characterized by: The limiting block (6) is screw-connected in the bearing sleeve (2).

5. The electric power wrench for large screws according to claim 1, characterized by: The bearing sleeve (2) is screw-connected in the electric wrench body (1).

6. The electric power wrench for large screws according to claim 1, characterized by: The outer side wall of the bearing sleeve (2) is provided with a positioning step (16), and the step surface of the positioning step (16) abuts against the outer surface of the electric wrench body (1).

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