Shaft lock structure and electric tool

Abstract

The utility model discloses a shaft lock structure and an electric tool. The shaft lock structure comprises a shaft lock frame, a lock ring, a torsion column and an output shaft, the shaft lock frame and the lock ring are arranged on the periphery of the output shaft in a sleeving mode, and the shaft lock frame, the lock ring and the output shaft are matched to limit the torsion column between the lock ring and the output shaft; the torsion column comprises a contact face capable of being matched with the inner wall of the locking ring, and when the output shaft is operated to rotate around the axis of the output shaft, the output shaft pushes the torsion column to move till at least part of the contact face abuts against the inner wall of the locking ring, so that the output shaft, the torsion column and the locking ring are locked. According to the shaft lock structure and the electric tool, the friction force between the torsion column and the lock ring is increased in a surface contact mode, and therefore the shaft lock structure and the electric tool can be suitable for use scenes where the electric tool needs to output medium-large torsion, and have the advantages of being small in size and low in cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of power tools, and particularly relates to an axial locking structure and a power tool. Background Art

[0002] Power tools are tools driven by electricity and can be used for various different operations, such as drilling, grinding, cutting, sanding, etc. There are a wide variety of power tools, including electric drills, electric hammers, electric saws, electric grinders, and so on.

[0003] Among them, the axial locking structure of a power tool generally includes at least an output shaft and an axial locking frame, which can achieve the functions of forward transmission and reverse self-locking. That is, when the axial locking frame rotates as the driving part, the axial locking frame can drive the output shaft to rotate synchronously through the axial lock. When the output shaft rotates as the driving part, the axial locking frame cannot rotate synchronously with the output shaft. This kind of axial lock is generally used in the situation of clamping or disassembling a chuck, or when the power tool is used as a manual tool.

[0004] In the prior art, the axial locking structure of a power tool includes an output shaft, a locking pin, a locking ring and an axial locking frame. During the use of the above power tool, since the locking pin and the locking ring are only designed for line contact, the above power tool is mostly suitable for small-torque power tools. When it is necessary for the power tool to output medium and large torque, due to the small contact area of the line-contact axial lock, the failure speed is fast.

[0005] Therefore, in view of the above technical problems, it is necessary to provide an axial locking structure and a power tool. Summary of the Utility Model

[0006] The purpose of the utility model is to provide an axial locking structure and a power tool, which can solve the problem that the line-contact axial lock fails quickly when the power tool outputs medium and large torque as described above.

[0007] In order to achieve the above purpose, the technical solution provided by a specific embodiment of the utility model is as follows:

[0008] An axial locking structure includes an axial locking frame, a locking ring, a torque column and an output shaft. The axial locking frame and the locking ring are sleeved on the outer periphery of the output shaft. The axial locking frame, the locking ring and the output shaft cooperate to limit the torque column between the locking ring and the output shaft;

[0009] The torque column includes a contact surface that can cooperate with the inner wall of the locking ring. When the output shaft is operatively rotated about its axis, the output shaft pushes the torque column to move so that at least part of the contact surface abuts against the inner wall of the locking ring, so that the output shaft, the torque column and the locking ring are locked.

[0010] In one or more embodiments of the present utility model, the output shaft includes a first abutting surface and a second abutting surface facing the torsion column, and the torsion column includes a third abutting surface that can cooperate with the first abutting surface and a fourth abutting surface that can cooperate with the second abutting surface;

[0011] When the output shaft is operatively rotated clockwise about its axis, the first abutting surface abuts against the third abutting surface to apply a force to the torsion column to abut against the inner wall of the lock ring;

[0012] When the output shaft is operatively rotated counterclockwise about its axis, the second abutting surface abuts against the fourth abutting surface to apply a force to the torsion column to abut against the inner wall of the lock ring.

[0013] In one or more embodiments of the present utility model, one of the output shaft and the torsion column includes a protruding portion, and the other includes a recessed portion that can cooperate with the protruding portion, and the first abutting surface, the second abutting surface, the third abutting surface, and the fourth abutting surface are formed on the protruding portion or the recessed portion; a gap is provided between the first abutting surface and the third abutting surface, and a gap is provided between the second abutting surface and the fourth abutting surface.

[0014] In one or more embodiments of the present utility model, at least two torsion columns are provided between the output shaft and the lock ring and are evenly spaced apart, and the at least two torsion columns limit the output shaft to be coaxial with the lock ring.

[0015] In one or more embodiments of the present utility model, the shaft lock bracket includes a driving block inserted into the lock ring. When the shaft lock bracket is operatively rotated about its axis, the driving block applies a force to the torsion column to rotate about the axis of the output shaft, so that the contact surface slides in cooperation with the inner wall of the lock ring.

[0016] In one or more embodiments of the present utility model, the shaft lock bracket includes two adjacent driving blocks, and the torsion column is assembled between the two adjacent driving blocks;

[0017] When the shaft lock bracket is operatively rotated clockwise about its axis, one of the two adjacent driving blocks abuts against the torsion column to apply a force to the torsion column to rotate about the axis of the output shaft;

[0018] When the shaft lock bracket is operatively rotated counterclockwise about its axis, the other of the two adjacent driving blocks abuts against the torsion column to apply a force to the torsion column to rotate about the axis of the output shaft;

[0019] Or, two adjacent torsion columns are included between the output shaft and the lock ring, and the driving block is inserted between the two adjacent torsion columns;

[0020] When the shaft lock frame is operably rotated clockwise about its axis, the driving block abuts against one of two adjacent torsion columns to apply a force to rotate it about the axis of the output shaft;

[0021] When the shaft lock frame is operably rotated counterclockwise about its axis, the driving block abuts against the other of two adjacent torsion columns to apply a force to rotate it about the axis of the output shaft.

[0022] In one or more embodiments of the present utility model, the number of the driving blocks corresponds to that of the torsion columns, and the driving blocks and the torsion columns are distributed at intervals from each other.

[0023] In one or more embodiments of the present utility model, the driving block includes a fifth abutting surface on its side wall, and the torsion column includes a sixth abutting surface on its side wall;

[0024] When the shaft lock frame is operably rotated about its axis, the fifth abutting surface abuts against the sixth abutting surface to apply a force to rotate the torsion column about the axis of the output shaft;

[0025] And / or; the shaft lock frame is provided with a shaft hole, and the output shaft is fitted through the shaft hole. When the shaft lock frame is operably rotated about its axis, the output shaft interferes with the inner wall of the shaft hole.

[0026] In one or more embodiments of the present utility model, the lock ring includes a first stop wall perpendicular to its axis, and the shaft lock frame includes a second stop wall perpendicular to its axis. The first stop wall and the second stop wall cooperate to limit the axial displacement of the torsion column along the output shaft.

[0027] In one or more embodiments of the present utility model, there is also provided a power tool including the above shaft locking structure.

[0028] Compared with the prior art, when an operator operates the output shaft to rotate about its axis, the output shaft of the shaft locking structure and the power tool of the present utility model can push at least part of the contact surface of the torsion column against the inner wall of the lock ring, so that the friction between the contact surface of the torsion column and the inner wall of the lock ring can be used to limit the continuous rotation of the output shaft. The torsion column and the lock ring adopt a surface contact method to increase the friction between them, so it can be applied to the use scenarios where a medium or large torque is required for the output of the power tool, and it also has the advantages of small volume and low cost. Description of the Drawings

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 Explosion schematic diagram of the shaft lock structure in an embodiment of the present invention;

[0031] Figure 2 Explosion schematic diagram of the shaft lock structure from another perspective in an embodiment of the present invention;

[0032] Figure 3 Schematic assembly diagram of the shaft lock frame, torsion column and output shaft in the initial state in an embodiment of the present invention;

[0033] Figure 4 Schematic assembly diagram of the shaft lock frame, torsion column and output shaft when the output shaft rotates counterclockwise in an embodiment of the present invention;

[0034] Figure 5 Schematic assembly diagram of the shaft lock frame, torsion column and output shaft when the shaft lock frame rotates counterclockwise in an embodiment of the present invention;

[0035] Figure 6 Schematic assembly diagram of the shaft lock frame, torsion column and output shaft from another perspective when the shaft lock frame rotates counterclockwise in an embodiment of the present invention.

[0036] Main reference numeral description:

[0037] 1. Shaft lock frame; 11. Second stop wall; 12. Driving block; 13. Shaft hole; 14. First driving surface; 15. Second driving surface; 16. Fifth abutting surface; 2. Lock ring; 21. First stop wall; 3. Torsion column; 31. Third abutting surface; 32. Fourth abutting surface; 33. Sixth abutting surface; 4. Output shaft; 41. First abutting surface; 42. Second abutting surface. Detailed implementation manners

[0038] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Reference Figure 1 In one embodiment of the present utility model, the shaft locking structure includes a shaft locking frame 1, a locking ring 2, a torsion column 3, and an output shaft 4.

[0040] Reference Figure 2 and Figure 3 The shaft locking frame 1 and the locking ring 2 are sleeved on the outer periphery of the output shaft 4, and the shaft locking frame 1, the locking ring 2, and the output shaft 4 cooperate to limit the torsion column 3 between the locking ring 2 and the output shaft 4. Specifically, the locking ring 2 includes a first stop wall 21 perpendicular to its axial direction, and the shaft locking frame 1 includes a second stop wall 11 perpendicular to its axial direction. The first stop wall 21 and the second stop wall 11 cooperate to limit the displacement of the torsion column 3 along the axial direction of the output shaft 4.

[0041] In this embodiment, the first stop wall 21 is arranged as an annular plate fixed to one side of the locking ring 2. The second stop wall 11 is the side wall of the shaft locking frame 1. Combining Figure 3 the position of the torsion column 3 can be effectively limited by the first stop wall 21, the second stop wall 11, the inner wall of the locking ring 2, and the outer wall of the output shaft 4.

[0042] Reference Figure 3 The torsion column 3 includes a contact surface that can cooperate with the inner wall of the locking ring 2. When the output shaft 4 is operatively rotated about its axis, the output shaft 4 pushes the torsion column 3 to move until at least part of the contact surface abuts against the inner wall of the locking ring 2, so that the output shaft 4, the torsion column 3, and the locking ring 2 are locked. When the output shaft 4, the torsion column 3, and the locking ring 2 are locked, since the torsion column 3 and the inner wall of the locking ring 2 are in surface contact, the friction force between the two can be increased, so that the use scenario with a large torque required can be provided. It should be noted that the locking ring 2 is fixed in the external housing, so the locking ring 2 does not rotate, so that the output shaft 4, the torsion column 3, and the locking ring 2 can be effectively locked.

[0043] Reference Figure 3 The output shaft 4 includes a first abutting surface 41 and a second abutting surface 42 facing the torsion column 3. The torsion column 3 includes a third abutting surface 31 that can cooperate with the first abutting surface 41 and a fourth abutting surface 32 that can cooperate with the second abutting surface 42.

[0044] When the output shaft 4 is operatively rotated clockwise about its axis, the first abutting surface 41 abuts against the third abutting surface 31 to apply a force to abut against the inner wall of the locking ring 2 to the torsion column 3; when the output shaft 4 is operatively rotated counterclockwise about its axis (such as Figure 4 ), the second abutting surface 42 abuts against the fourth abutting surface 32 to apply a force to abut against the inner wall of the locking ring 2 to the torsion column 3.

[0045] Through the abutting fit between the first abutting surface 41 and the third abutting surface 31, the contact surface of the torsion column 3 can be frictionally abutted against the inner wall of the lock ring 2, so as to limit the further clockwise rotation of the torsion column 3. Similarly, the cooperation between the second abutting surface 42 and the fourth abutting surface 32 can also limit the further counterclockwise rotation of the torsion column 3.

[0046] Referring to Figure 3 , one of the output shaft 4 and the torsion column 3 includes a convex portion, and the other includes a concave portion that can cooperate with the convex portion. The first abutting surface 41, the second abutting surface 42, the third abutting surface 31, and the fourth abutting surface 32 are formed on the convex portion or the concave portion. In this embodiment, the convex portion is provided on the torsion column 3, and the concave portion is provided on the output shaft 4. In other embodiments, the convex portion can also be provided on the output shaft 4, and the concave portion can be provided on the torsion column 3. Among them, when there is no relative rotation between the output shaft 4 and the torsion column 3, there is a gap between the first abutting surface 41 and the third abutting surface 31, and there is a gap between the second abutting surface 42 and the fourth abutting surface 32.

[0047] Referring to Figure 3 , at least two torsion columns 3 are evenly spaced between the output shaft 4 and the lock ring 2, and the at least two torsion columns 3 limit the output shaft 4 to be coaxial with the lock ring 2. In this embodiment, three torsion columns 3 are provided to cooperate to limit the output shaft 4 to be coaxial with the lock ring 2.

[0048] Referring to Figure 2 and Figure 5 , the shaft lock bracket 1 includes a driving block 12 inserted into the lock ring 2. When the shaft lock bracket 1 is operatively rotated about its axis, the driving block 12 applies a force to the torsion column 3 to rotate about the axis of the output shaft 4, so that the contact surface slides in cooperation with the inner wall of the lock ring 2. When the shaft lock bracket 1 drives the torsion column 3 to move to the unlocked state, at this time, the shaft lock bracket 1 can drive the output shaft 4 to rotate.

[0049] In this embodiment, the shaft lock bracket 1 includes two adjacent driving blocks 12, and the torsion column 3 is assembled between the two adjacent driving blocks 12. When the shaft lock bracket 1 is operatively rotated clockwise about its axis, one of the two adjacent driving blocks 12 abuts against the torsion column 3 to apply a force to the torsion column 3 to rotate about the axis of the output shaft 4; when the shaft lock bracket 1 is operatively rotated counterclockwise about its axis, the other of the two adjacent driving blocks 12 abuts against the torsion column 3 to apply a force to the torsion column 3 to rotate about the axis of the output shaft 4.

[0050] In an alternative embodiment, there are two adjacent torsion posts 3 between the output shaft 4 and the lock ring 2, and the driving block 12 is inserted between the two adjacent torsion posts 3. When the shaft lock bracket 1 is operatively rotated clockwise about its axis, the driving block 12 abuts against one of the two adjacent torsion posts 3 to apply a force for rotating about the axis of the output shaft 4; when the shaft lock bracket 1 is operatively rotated counterclockwise about its axis, the driving block 12 abuts against the other of the two adjacent torsion posts 3 to apply a force for rotating about the axis of the output shaft 4.

[0051] Referring to Figure 3 , the number of the driving blocks 12 and the torsion posts 3 corresponds, and the driving blocks 12 and the torsion posts 3 are distributed at intervals from each other. In this embodiment, there are three driving blocks 12, and three torsion posts 3 are correspondingly provided. The driving blocks 12 are evenly distributed at equal intervals in a circumferential manner, and the torsion posts 3 are also evenly distributed at equal intervals in a circumferential manner.

[0052] Therefore, when the shaft lock bracket 1 is driven by a motor to rotate about its axis, the driving block 12 can abut against and push the torsion post 3 to rotate about the axis of the lock ring 2. When the driving block 12 drives the torsion post 3 to move to the unlocking state, at this time, the torsion post 3 is in a loose state between the outer wall of the output shaft 4 and the inner wall of the lock ring 2, so as to facilitate the lock ring 2 to drive the output shaft 4 to rotate alone.

[0053] Referring to Figure 5 , further, the driving block 12 includes a fifth abutting surface 16 on its side wall, and the torsion post 3 includes a sixth abutting surface 33 on its side wall. When the shaft lock bracket 1 is operatively rotated about its axis, the fifth abutting surface 16 abuts against the sixth abutting surface 33 to apply a force for rotating the torsion post 3 about the axis of the output shaft 4. In this embodiment, the contact between the driving block 12 and the torsion post 3 is also set as surface contact, so as to ensure the effectiveness of force transmission and further ensure that the torsion post 3 can rotate synchronously under the action of the driving block 12.

[0054] Referring to Figure 2 and Figure 6 , the shaft lock bracket 1 is provided with a shaft hole 13, and the output shaft 4 is fitted and passed through the shaft hole 13. When the shaft lock bracket 1 is operatively rotated about its axis, the output shaft 4 interferes with the inner wall of the shaft hole 13.

[0055] Specifically, the shaft hole 13 includes a first driving surface 14 and a second driving surface 15. When the driving block 12 drives the torsion post 3 to rotate clockwise about the axis of the output shaft 4, the first driving surface 14 abuts against the first abutting surface 41 to drive the output shaft 4 to rotate clockwise about its axis; when the driving block 12 drives the torsion post 3 to rotate counterclockwise about the axis of the output shaft 4 (such as Figure 6 ), the second driving surface 15 abuts against the second abutting surface 42 to drive the output shaft 4 to rotate counterclockwise about its axis.

[0056] The implementation principle of the shaft lock structure of the present utility model is as follows:

[0057] Referring to Figure 3 , in the initial state of the shaft locking structure, there is a gap between the first abutting surface 41 of the output shaft 4 and the third abutting surface 31 of the torsion column 3, and there is a gap between the second abutting surface 42 of the output shaft 4 and the fourth abutting surface 32 of the torsion column 3.

[0058] Referring to Figure 4 , when the output shaft 4 is operatively rotated clockwise about its axis, the first abutting surface 41 of the output shaft 4 abuts against the third abutting surface 31 of the torsion column 3, and the output shaft 4, the torsion column 3 and the lock ring 2 are relatively locked to each other, so that the rotation of the output shaft 4 can be restricted. At this time, since the contact between the torsion column 3 and the lock ring 2 is a surface contact, the frictional force between the two is large, so that it can be adapted to the use scenarios requiring medium and large torques. Similarly, when the output shaft 4 is operatively rotated clockwise about its axis, the rotation of the output shaft 4 can also be restricted.

[0059] Referring to Figure 5 and Figure 6 , when the shaft lock bracket 1 is operatively rotated clockwise about its axis, the driving block 12 can abut and push the torsion column 3 to slide in the lock ring 2 about the axis of the shaft lock bracket 1, so that the torsion column 3 and the lock ring 2 can be in a loose state. At this time, the first driving surface 14 abuts against the first abutting surface 41, thereby driving the output shaft 4 to rotate clockwise. Similarly, when the shaft lock bracket 1 is operatively rotated counterclockwise about its axis, the output shaft 4 can also be driven to rotate counterclockwise.

[0060] It should be noted that in the embodiments of the present invention, the clockwise or counterclockwise rotation of the output shaft 4 about the axis means that the output shaft 4 is an actively rotating component in the shaft locking structure. For example, the output shaft 4 can be applied with a force for rotating about the axis by an operator in a screwing manner.

[0061] Similarly, the clockwise or counterclockwise rotation of the shaft lock bracket 1 about the axis means that the shaft lock bracket 1 is an actively rotating component in the shaft locking structure. For example, the shaft lock bracket 1 can be connected to a driving motor, and the driving motor applies a force for rotating about the axis. The embodiments of the present invention do not limit this.

[0062] An embodiment of the present invention further provides a power tool, including the above-mentioned shaft locking structure. It can be understood that the power tool provided with the above-mentioned shaft locking structure can be applied to the use scenarios requiring medium and large torque output. And because the components involved in the above-mentioned shaft locking structure are few and are closely matched with each other, the power tool of this embodiment also has the advantages of small volume and low cost.

[0063] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned 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.

[0064] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A shaft lock structure, characterized in that: The invention comprises a shaft lock frame (1), a lock ring (2), a torque column (3) and an output shaft (4); the shaft lock frame (1) and the lock ring (2) are sleeved on the outer circumference of the output shaft (4); the shaft lock frame (1), the lock ring (2) and the output shaft (4) cooperate to limit the torque column (3) between the lock ring (2) and the output shaft (4); The torsion column (3) comprises a contact surface which can cooperate with the inner wall of the locking ring (2); when the output shaft (4) is operatively rotated around its axis, the output shaft (4) pushes the torsion column (3) to move until at least part of the contact surface is in tight contact with the inner wall of the locking ring (2), so that the output shaft (4), the torsion column (3) and the locking ring (2) are locked.

2. The shaft lock structure according to claim 1, characterized in that: The output shaft (4) comprises a first abutting surface (41) and a second abutting surface (42) facing the torsion column (3); the torsion column (3) comprises a third abutting surface (31) that can cooperate with the first abutting surface (41) and a fourth abutting surface (32) that can cooperate with the second abutting surface (42); When the output shaft (4) is operated to rotate clockwise around its axis, the first abutting surface (41) abuts against the third abutting surface (31) to apply a force to the torsion column (3) to press against the inner wall of the locking ring (2); When the output shaft (4) is operatively rotated counterclockwise around its axis, the second abutting surface (42) abuts against the fourth abutting surface (32) to apply a force to the torsion column (3) to press against the inner wall of the locking ring (2).

3. The shaft lock structure according to claim 2, characterized in that: One of the output shaft (4) and the torque column (3) includes a protruding portion, and the other includes a recessed portion that can cooperate with the protruding portion; the first abutting surface (41), the second abutting surface (42), the third abutting surface (31) and the fourth abutting surface (32) are formed on the protruding portion or the recessed portion; a gap is provided between the first abutting surface (41) and the third abutting surface (31), and a gap is provided between the second abutting surface (42) and the fourth abutting surface (32).

4. The shaft lock structure according to claim 1, characterized in that: At least two evenly spaced torsion columns (3) are arranged between the output shaft (4) and the locking ring (2), and the at least two torsion columns (3) limit the output shaft (4) to be coaxial with the locking ring (2).

5. The shaft lock structure according to claim 1, characterized in that: The shaft lock frame (1) comprises a driving block (12) inserted into the locking ring (2); when the shaft lock frame (1) is operated to rotate around its axis, the driving block (12) applies a force to the torsion column (3) to rotate around the axis of the output shaft (4), so that the contact surface and the inner wall of the locking ring (2) are slidably matched.

6. The shaft lock structure according to claim 5, characterized in that: The shaft lock frame (1) comprises two adjacent driving blocks (12), and the torque column (3) is assembled between the two adjacent driving blocks (12); When the shaft lock frame (1) is operated to rotate clockwise around its axis, one of the two adjacent driving blocks (12) abuts against the torsion column (3) to apply a force to the torsion column (3) to rotate around the axis of the output shaft (4); When the shaft lock frame (1) is operated to rotate counterclockwise around its axis, the other of the two adjacent driving blocks (12) abuts against the torsion column (3) to apply a force to the torsion column (3) to rotate around the axis of the output shaft (4); Alternatively, the output shaft (4) and the locking ring (2) include two adjacent torsion columns (3), and the driving block (12) is inserted between the two adjacent torsion columns (3); When the shaft lock frame (1) is operated to rotate clockwise around its axis, the driving block (12) abuts against one of the two adjacent torsion columns (3) to apply a force to rotate it around the axis of the output shaft (4); When the shaft lock frame (1) is operated to rotate counterclockwise around its axis, the driving block (12) abuts against the other of the two adjacent torsion columns (3) to apply a force to rotate it around the axis of the output shaft (4).

7. The shaft lock structure according to claim 5, characterized in that: The number of the driving blocks (12) and the torsion columns (3) corresponds to each other, and the driving blocks (12) and the torsion columns (3) are spaced apart from each other.

8. The shaft lock structure according to claim 5, characterized in that: The driving block (12) includes a fifth abutting surface (16) located on a side wall thereof, and the torsion column (3) includes a sixth abutting surface (33) located on a side wall thereof; When the shaft lock frame (1) is operated to rotate around its axis, the fifth abutting surface (16) abuts against the sixth abutting surface (33) to apply a force to the torsion column (3) to rotate around the axis of the output shaft (4); And / or; the shaft lock frame (1) is provided with a shaft hole (13), the output shaft (4) is cooperatively arranged in the shaft hole (13), and when the shaft lock frame (1) is operated to rotate around its axis, the output shaft (4) interferes with the inner wall of the shaft hole (13).

9. The shaft lock structure according to claim 1, characterized in that: The locking ring (2) comprises a first stop wall (21) perpendicular to its axial direction, and the shaft lock frame (1) comprises a second stop wall (11) perpendicular to its axial direction, and the first stop wall (21) and the second stop wall (11) cooperate to limit the axial displacement of the torsion column (3) along the output shaft (4).

10. An electric tool, characterized in that: The invention comprises the shaft locking structure as described in any one of claims 1 to 9.

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