Electric wrench

Abstract

The utility model discloses an electric wrench, which relates to the technical field of operation tools and comprises an electric tool and a socket wrench, an output shaft is mounted at the output end of the electric tool, the socket wrench comprises a wrench connecting column detachably mounted at the front end of the output shaft, and a sleeve is arranged at the front end of the wrench connecting column. A positioning push block is longitudinally and slidably sleeved in the sleeve, the positioning push block is of an I-shaped structure, and the positioning push block is connected in the sleeve through a spring. The positioning push block and the auxiliary clamping plate are arranged in the sleeve, when a nut is placed in the sleeve, the positioning push block can be pushed to move upwards, and then the positioning push block drives the auxiliary clamping plate to rotate; clamping force is provided for the nut through the auxiliary clamping plate, so that the occlusal force of the sleeve to the nut is increased, the slipping situation in the screwing process is effectively prevented, the nut can be stably clamped through the clamping effect of the auxiliary clamping plate, the problem that the nut directly falls off is solved, and the nut cannot be lost after being disassembled.

Description

Technical Field

[0001] The utility model belongs to the technical field of working tools, and particularly relates to an electric wrench. Background Art

[0002] Electric wrenches are a common tool used in daily work and life, and are indispensable for both routine mechanical maintenance and construction and installation. They primarily consist of a motor, a speed reducer, an output shaft, a control switch, and a housing. Their operating principle is this: the motor, acting as a power source, converts electrical energy into mechanical energy. The speed is reduced and torque is increased via the speed reducer, thereby driving the output shaft to rotate. The output shaft then directly acts on a bolt or nut, tightening or loosening the thread.

[0003] In order to ensure that the nut can be inserted into the socket wrench, the inner diameter of the socket of the existing electric socket wrench is generally set to be slightly larger than the outer diameter of the nut. In this case, the biting force of the socket on the nut is insufficient, which is prone to slipping. Moreover, after the nut is unscrewed, the nut is easy to fall off, and sometimes it is difficult to find it once it falls off. If the inner diameter of the socket of the wrench is completely matched with the outer diameter of the nut, due to the stress generated during the screwing process, the surface of the nut will inevitably rust after long-term use, and it will be difficult to remove the nut from the socket wrench after unscrewing. Utility Model Content

[0004] In response to the problems existing in the prior art, the utility model provides an electric wrench, which increases the bite force between the socket wrench and the nut by adding an auxiliary clamp between the socket wrench and the nut, and solves the problem that the nut falls directly after being removed and is difficult to find.

[0005] The solution adopted by the utility model to solve its technical problems is: an electric wrench, comprising an electric tool and a socket wrench, the output end of the electric tool is equipped with an output shaft, the socket wrench comprises a wrench receiving column detachably mounted on the front end of the output shaft, the front end of the wrench receiving column is provided with a sleeve, a positioning push block is longitudinally slidably sleeved in the sleeve, the positioning push block is an I-shaped structure, and the positioning push block is connected to the sleeve by a spring, the upper and lower ends of the spring are respectively connected to the inner top wall of the sleeve and the upper surface of the positioning push block, a movable groove is symmetrically opened on the inner wall of the sleeve, an auxiliary splint is rotatably sleeved in the movable groove by a pin shaft, the auxiliary splint is divided into a lower vertical part and an upper inclined part, the positioning push block is pushed by the spring to be located at the vertical part of the auxiliary splint and close to the insertion end of the sleeve; and a positioning component is also included, which is used to limit and fix the positioning push block after it moves upward.

[0006] Furthermore, the positioning assembly includes a card slot symmetrically opened in the positioning push block, and a curved card column is horizontally slidably sleeved in the card slot, and the curved card column is connected to the card slot through a compression spring. A positioning hole is opened through the sleeve, and the curved card column can be clamped in the positioning hole.

[0007] Furthermore, an elastic sheet is installed on the outer wall of the sleeve, a pressing post is horizontally fixed on the inner surface of the elastic sheet, and the inner end of the pressing post is movably inserted into the positioning hole.

[0008] Furthermore, the output shaft includes a main shaft installed at the output end of the power tool, a polygonal shaft is fixed at the front end of the main shaft, and an embedding groove is provided on the outer wall of the polygonal shaft. The socket wrench includes a polygonal tube sleeve fixed at the tail end of the wrench column, and the inner diameter of the polygonal tube sleeve matches the outer diameter of the polygonal shaft, and an embedding ring is provided on the inner wall of the polygonal tube sleeve, and the embedding ring matches the embedding groove.

[0009] Furthermore, the upper and lower protrusions of the positioning push block are protrusions that match the internal shape and structure of the sleeve.

[0010] Furthermore, the vertical portion of the auxiliary splint does not exceed the inner wall surface of the sleeve when it is longitudinally located in the movable groove.

[0011] Furthermore, a manual insertion hole is provided through the wrench receiving column of the socket wrench.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The present invention provides a positioning push block and an auxiliary clamping plate in the sleeve. When the nut is placed in the sleeve, the positioning push block will be pushed upward, and the auxiliary clamping plate will be driven to rotate by the positioning push block, and the auxiliary clamping plate will provide a clamping force for the nut. The design of the positioning component can limit the positioning push block, thereby ensuring that the auxiliary clamping plate can provide a stable clamping effect on the nut, thereby increasing the bite force of the sleeve on the nut and effectively preventing slipping during the screwing process. In addition, by utilizing the clamping effect of the auxiliary clamping plate, the nut can be stably clamped when the nut is unscrewed, solving the problem of the nut falling directly, so that the nut will not be lost after disassembly. The cooperation of the spring piece and the pressing column can also make it easy for the operator to take the removed nut out of the sleeve, thereby improving work efficiency. The output shaft and the socket wrench adopt a detachable connection method, which makes it convenient to replace socket wrenches of different sizes according to the size of the nut, thereby increasing the flexibility and applicability of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the matching structure of the output shaft and the socket wrench of the utility model;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the socket wrench of the present invention;

[0017] Figure 4 This is a schematic diagram of the internal structure of the socket wrench of the present utility model;

[0018] Figure 5 for Figure 2 A schematic diagram of the structure enlarged in the middle;

[0019] Figure 6 for Figure 3 Schematic diagram of the structure enlarged at point B.

[0020] In the figure: 1. Power tool; 2. Output shaft; 21. Main shaft; 22. Polygonal shaft; 23. Embossed groove; 3. Socket wrench; 31. Polygonal sleeve; 32. Embossed ring; 33. Wrench terminal; 34. Socket; 35. Manual socket; 36. Movable slot; 4. Positioning push block; 5. Spring; 6. Auxiliary splint; 7. Positioning assembly; 71. Arc clamping column; 72. Compression spring; 73. Positioning hole; 74. Pressing column; 75. Spring. DETAILED DESCRIPTION

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

[0022] See also Figure 1-6 , the utility model provides a technical solution for an electric wrench: Example

[0023] according to Figure 1 and Figure 2 As shown, it includes 3, the output end of the power tool 1 is installed with an output shaft 2, and the socket wrench 3 is installed on the power tool 1 through the output shaft 2. When the power tool 1 is started, the socket wrench 3 is automatically rotated by the output shaft 2 to realize the electric removal of the nut. The specific structure of the socket wrench 3 is as follows Figure 3 and Figure 4 As shown, it includes a wrench receiving column 33 that can be detachably mounted on the front end of the output shaft 2. A sleeve 34 is fixedly provided at the front end of the wrench receiving column 33. An insertion groove that matches the shape of a universal hexagonal bolt or nut is provided in the sleeve 34. A positioning push block 4 is longitudinally slidably sleeved in the sleeve 34, and the positioning push block 4 is connected to the sleeve 34 through a spring 5. The upper and lower ends of the spring 5 are respectively connected to the inner top wall of the insertion groove of the sleeve 34 and the upper surface of the positioning push block 4. The positioning push block 4 is an I-shaped structure, and the upper and lower protrusions are hexagonal protrusions that match the shape of the insertion groove of the sleeve 34, so that the positioning push block 4 can be directionally slidably sleeved in the sleeve 34.

[0024] Movable grooves 36 are symmetrically provided on two opposite wall surfaces inside the sleeve 34, and an auxiliary splint 6 is mounted in the movable groove 36 by rotating the pin. The auxiliary splint 6 is divided into a lower vertical part and an upper inclined part with the hinge point as the dividing line. When the auxiliary splint 6 is in the original state, the lower half of the hinge point is in a vertical state and is located in the movable groove 36 and does not exceed the inner wall surface of the sleeve 34, and the upper half of the hinge point is inclined inwardly. The positioning push block 4 is pushed by the spring 5 to be located in the vertical part of the auxiliary splint 6 and close to the insertion end of the sleeve 34; when a wrench is needed to remove or install the nut, the nut is inserted into the insertion groove of the socket wrench 3, and the nut is inserted into the insertion groove of the socket wrench 3. Due to the interaction force between the socket wrench 3 and the nut, the positioning push block 4 is pushed upward, and the spring 5 is compressed to store energy. While moving upward, the positioning push block 4 will contact the inclined part of the auxiliary splint 6, driving the auxiliary splint 6 to rotate around the hinge point. The vertical part of the auxiliary splint 6 is pushed inward to rotate and contact the nut to provide clamping for it. When the positioning push block 4 moves upward to the specified position, it is limited and fixed by the positioning assembly 7, so that the vertical part of the auxiliary splint 6 provides a stable clamping force for the nut pressed into the insertion slot of the socket 34, thereby increasing the auxiliary bite force between the socket wrench 3 and the nut, and preventing the nut from falling directly after removal.

[0025] The structure of the positioning component 7 is as follows Figure 6 When the nut is inserted into the socket wrench 3 and the positioning push block 4 is pushed into place, the elastic force of the compression spring 72 can push the arc surface post 71 into the positioning hole 73, thereby fixing the position of the positioning push block 4 and ensuring that the auxiliary clamping plate 6 can provide continuous clamping for the nut when the power tool 1 controls the socket wrench 3 to rotate and install or remove the nut.

[0026] The positioning assembly 7 also includes a spring piece 75 installed on the outer wall of the sleeve 34. A pressing column 74 is fixed horizontally on the inner surface of the spring piece 75, and the inner end of the pressing column 74 is movably inserted into the positioning hole 73. When the nut needs to be removed from the socket wrench 3 after being removed, the operator can press the spring piece 75 to move the pressing column 74 deeper into the positioning hole 73, and then push the arc-surface clamping column 71 inward to retract and disengage from the positioning hole 73 by pressing the column 74, and then push the positioning push block 4 downward under the elastic force of the spring 5, and then push the nut inserted into the slot of the sleeve 34 out through the positioning push block 4, so as to achieve the effect of quickly removing the nut.

[0027] When in use, the utility model provides an electric wrench. When removing a nut, the electric tool 1 and the socket wrench 3 are placed just above the nut and the socket wrench 3 is pressed down, so that the nut enters the insertion groove of the sleeve 34, and when the nut enters the sleeve 34, it pushes the positioning push block 4 to move upward, and the spring 5 starts to store energy. While moving upward, the positioning push block 4 presses the inclined part of the auxiliary splint 6 to rotate outward, thereby driving the vertical part of the auxiliary splint 6 to rotate inward and contacting the nut to provide a clamping extrusion force for the nut. When the positioning push block 4 moves to the specified position, the arc-surface clamping column 71 can be pushed to the positioning hole 7 by the elastic force of the compression spring 72. 3, and then the positioning push block 4 is limited and fixed in the specified position; then the power tool 1 is controlled to start, and the socket wrench 3 is driven to rotate by the output shaft 2, and then the nut is driven to rotate, so as to realize automatic disassembly of the nut. When the nut is screwed and removed, due to the clamping cooperation of the auxiliary splint 6, the nut will not fall directly in the sleeve 34. When the nut needs to be removed, the operator manually presses the spring piece 75 inward to drive the pressing column 74 to move inward, pushing the arc-surface clamping column 71 out of the positioning hole 73, and then under the elastic force of the spring 5, the nut is automatically pushed out of the sleeve 34 through the positioning push block 4; the installation principle of the nut is the same as the disassembly principle. Example

[0028] Based on the first embodiment, Figure 2 and Figure 5 As shown, the output shaft 2 includes a main shaft 21 directly mounted on the output end of the power tool 1, a polygonal shaft 22 is fixed at the front end of the main shaft 21, and an embedding groove 23 is provided on the outer wall of the polygonal shaft 22, and the socket wrench 3 includes a polygonal tube sleeve 31 fixed at the tail end of the wrench column 33, and the inner diameter of the polygonal tube sleeve 31 matches the outer diameter of the polygonal shaft 22, so that the polygonal shaft 22 can be inserted into the polygonal tube sleeve 31, and an embedding ring 32 is provided along the inner wall of the polygonal tube sleeve 31, and the embedding ring 32 matches the embedding groove 23, and the embedding ring 32 can be stuck in the embedding groove 23. When installing the socket wrench 3 on the output shaft 2, insert the polygonal shaft 22 into the polygonal tube sleeve 31 and push the socket wrench 3 to move so that the embedded ring 32 is stuck in the embedded groove 23. Through the cooperation between the embedded ring 32 and the embedded groove 23, the socket wrench 3 can be installed on the output shaft 2, and after the polygonal shaft 22 is installed in place, the tail end abuts against the step surface formed at the connection between the main shaft 21 and the polygonal shaft 22.

[0029] By arranging the output shaft 2 and the socket wrench 3 in a detachable connection mode, the operator can conveniently replace the socket wrenches of different sizes according to the size of the nut when installing or removing the nut. Example

[0030] Based on the first embodiment, the same points as the first embodiment will not be repeated here, and the differences are as follows: Figure 2 and Figure 3 As shown, a manual socket 35 is provided on the wrench terminal 33 of the socket wrench 3. If the operator forgets to carry the power tool 1 or needs to manually remove the nut, the operator can directly insert the rotary rod into the manual socket 35, and then manually screw the socket wrench with the help of the rotary rod to achieve the effect of manually removing the nut.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electric wrench comprising an electric tool (1) and a socket (34) wrench (3), characterized in that: The output end of the electric tool (1) is equipped with an output shaft (2), the sleeve (34) wrench (3) includes a wrench receiving column (33) detachably mounted on the front end of the output shaft (2), the front end of the wrench receiving column (33) is provided with a sleeve (34), a positioning push block (4) is longitudinally slidably sleeved in the sleeve (34), the positioning push block (4) is an I-shaped structure, and the positioning push block (4) is connected to the sleeve (34) through a spring (5), the upper and lower ends of the spring (5) are respectively connected to the inner sleeve (34) and the lower sleeve (34) and the lower sleeve (34) are connected to the upper sleeve (34). The top wall and the upper surface of the positioning push block (4) are symmetrically provided with a movable groove (36) on the inner wall of the sleeve (34), and an auxiliary splint (6) is installed in the movable groove (36) through a pin rotation. The auxiliary splint (6) is divided into a lower vertical part and an upper inclined part. The positioning push block (4) is pushed by the spring (5) to be located in the vertical part of the auxiliary splint (6) and close to the insertion end of the sleeve (34); and also includes a positioning component (7), which is used to limit and fix the positioning push block (4) after it moves upward.

2. The electric wrench according to claim 1, characterized in that: The positioning assembly (7) includes a slot symmetrically provided in the positioning push block (4), a curved clamping column (71) is horizontally slidably sleeved in the slot, and the curved clamping column (71) is connected to the slot via a compression spring (72), and a positioning hole (73) is provided through the sleeve (34), and the curved clamping column (71) can be clamped in the positioning hole (73).

3. The electric wrench according to claim 2, characterized in that: The outer wall of the sleeve (34) is provided with a spring piece (75), the inner surface of the spring piece (75) is horizontally fixed with a pressing post (74), and the inner end of the pressing post (74) is movably inserted into the positioning hole (73).

4. The electric wrench according to claim 1, characterized in that: The output shaft (2) includes a main shaft (21) installed at the output end of the electric tool (1), a polygonal shaft (22) is fixed at the front end of the main shaft (21), and an outer wall of the polygonal shaft (22) is provided with an embedding groove (23), the sleeve (34) wrench (3) includes a polygonal tube sleeve (31) fixed at the rear end of the wrench post (33), and the inner diameter of the polygonal tube sleeve (31) matches the outer diameter of the polygonal shaft (22), and an embedding ring (32) is provided on the inner wall of the polygonal tube sleeve (31), and the embedding ring (32) matches the embedding groove (23).

5. The electric wrench according to claim 1, characterized in that: The upper and lower protrusions of the positioning push block (4) are protrusions that match the internal shape and structure of the sleeve (34).

6. The electric wrench according to claim 1, characterized in that: The vertical portion of the auxiliary splint (6) does not exceed the inner wall surface of the sleeve (34) when it is longitudinally located in the movable groove (36).

7. The electric wrench according to claim 1, characterized in that: A manual insertion hole (35) is provided through the wrench connection column (33) of the sleeve (34) wrench (3).

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