Electric tool

Abstract

The utility model discloses an electric tool which comprises a gear box, a striking block, a check ring and a stop pin. A through hole is formed in the gear box; the striking block is arranged in the gear box in the axial direction, and a concave annular groove is formed in the outer side wall of the striking block. The check ring is movably arranged on the outer wall of the gear box in the axial direction. The first end of the stop pin abuts against the inner wall of the check adjusting ring, and the second end of the stop pin penetrates through the through hole in the radial direction. A guide face is arranged on the check adjusting ring and / or the stop pin, the guide face is used for converting axial movement of the check adjusting ring into radial movement of the stop pin, in the locking state, the stop pin is inserted into the annular groove of the striking block, and in the unlocking state, the stop pin is separated from the annular groove. The position relation between the stop pin and the annular groove is adjusted by changing the axial position of the check ring, and therefore the rotation function and the rotation impact function can be switched back and forth. The device is simple in structure and convenient to operate, and has high production and popularization value.

Description

Technical Field

[0001] The utility model belongs to the field of electromechanical technology, and in particular relates to an electric tool. Background Art

[0002] With the development of power tool technology, power tools such as electric wrenches and electric screwdrivers have emerged, which can tighten and loosen screws and nuts on hard structures.

[0003] The existing electric wrenches and electric screwdrivers drive the striking block to rotate through the herringbone shaft, and at the same time, the ball moves in the slide groove of the herringbone shaft to drive the striking block to move forward and backward, thereby forming a rotating striking effect on the output shaft. Therefore, the existing electric wrenches and electric screwdrivers only have one function of rotating impact. If only the electric tool needs to realize the rotating function, the existing electric wrenches and electric screwdrivers cannot meet the user's needs.

[0004] 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

[0005] The utility model aims to provide an electric tool, which can realize the back and forth switching of two functions, namely, a rotation function and a rotation impact function, by moving a shift ring.

[0006] In order to achieve the above purpose, the technical solution provided by a specific embodiment of the utility model is as follows:

[0007] An electric tool, comprising:

[0008] A gear box, wherein the gear box is provided with a through hole;

[0009] A striking block is axially arranged in the gear box, and an outer side wall of the striking block is provided with a concave annular groove;

[0010] A retaining ring, movably arranged on the outer wall of the gear box along the axial direction;

[0011] A stop pin, wherein a first end of the stop pin abuts against an inner wall of the adjusting ring, and a second end of the stop pin radially penetrates the through hole;

[0012] The adjusting ring and / or the stop pin are provided with a guide surface, and the guide surface is used to convert the axial movement of the adjusting ring into the radial movement of the stop pin. In the locked state, the stop pin is inserted in the annular groove of the striking block, and in the unlocked state, the stop pin is separated from the annular groove.

[0013] In one or more embodiments of the present invention, the shift adjusting ring comprises a mounting portion and an abutting portion, the mounting portion is axially movably arranged on the outer wall of the gear box, and the first end of the stop pin abuts against the inner wall of the abutting portion.

[0014] In one or more embodiments of the present invention, the guide surface is arranged on the inner wall of the abutment portion, and the inner diameter of the guide surface gradually increases or decreases in whole or in part along the axial direction.

[0015] In one or more embodiments of the present invention, the abutment portion is disposed on the proximal outer wall of the mounting portion, and the inner diameter of the guide surface increases gradually in whole or in part in a direction from the distal end to the proximal end.

[0016] In one or more embodiments of the present invention, a first abutting surface is provided on the end surface of the mounting portion facing the abutting portion, and in the locked state, the side wall of the stop pin abuts against the first abutting surface; and / or,

[0017] A second abutment surface is provided on the inner wall of the abutment portion facing the mounting portion. In a locked state, the surface of the stop pin away from the annular groove abuts against the second abutment surface.

[0018] In one or more embodiments of the present invention, the inner wall of the mounting portion is provided with an internal thread, the outer wall of the gear box is provided with an external thread, and the mounting portion is threadedly connected to the outer wall of the gear box.

[0019] In one or more embodiments of the present invention, the maximum distance from the guide surface to the gear box is smaller than the length of the stop pin.

[0020] In one or more embodiments of the present invention, the stop pin includes a head and a rod passing through the through hole, and the electric tool also includes an elastic member sleeved on the rod, the first end of the elastic member abuts against the head, and the second end of the elastic member abuts against the outer wall of the gear box, so that the stop pin has a tendency to move away from the annular groove.

[0021] In one or more embodiments of the present invention, the surface of the stop pin away from the annular groove is an arc surface.

[0022] In one or more embodiments of the present invention, the gear box is provided with a plurality of through holes along the circumferential direction, and the electric tool comprises a plurality of stop pins arranged along the circumferential direction; and / or,

[0023] The guide surface includes at least one of a flat surface and a curved surface.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] The utility model adjusts the positional relationship between the stop pin and the ring groove by changing the axial position of the regulating ring, thereby realizing the back and forth switching of the two functions of the rotation function and the rotation impact function; the utility model is easy to operate, simple in structure, and has high production and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a cross-sectional structural schematic diagram of an electric tool in a locked state in one embodiment of the utility model;

[0028] Figure 2 It is a schematic cross-sectional view of the electric tool in an unlocked state in one embodiment of the utility model;

[0029] Figure 3 This is a schematic diagram of the three-dimensional structure of a gear box in one embodiment of the utility model;

[0030] Figure 4 This is a schematic diagram of the three-dimensional structure of the striking block in one embodiment of the utility model;

[0031] Figure 5 This is a schematic cross-sectional view of the retaining ring in one embodiment of the utility model;

[0032] Figure 6 for Figure 1 A magnified view of the local structure at point A. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0036] The technical solution of the present utility model will be described below in conjunction with the accompanying drawings.

[0037] Reference Figure 1 to Figure 5 As shown, the electric tool in this embodiment includes: a gear box 1, a striking block 2, a retaining ring 3, and a stop pin 4.

[0038] Among them, a through hole 11 is provided on the gear box 1; the striking block 2 is axially arranged in the gear box 1, and the outer wall of the striking block 2 is provided with a recessed annular groove 21; the adjusting ring 3 is axially movably arranged on the outer wall of the gear box 1; the first end of the stop pin 4 abuts against the inner wall of the adjusting ring 3, and the second end of the stop pin 4 radially passes through the through hole 11; the adjusting ring 3 and / or the stop pin 4 are provided with a guide surface 5, and the guide surface 5 is used to convert the axial movement of the adjusting ring 3 into the radial movement of the stop pin 4. In the locked state, the stop pin 4 is inserted in the annular groove 21 of the striking block 2, and the electric tool can only realize the rotation function; in the unlocked state, the stop pin 4 is separated from the annular groove 21, and the electric tool is converted from the locked state to the unlocked state, and the electric tool can realize the rotation impact function.

[0039] According to this design, when the second end of the stop pin 4 is located in the annular groove 21, the striking block 2 is limited by the stop pin 4 in the axial direction and cannot form an impact, so as to meet the needs of users who only need the rotation function; when the second end of the stop pin 4 is away from the annular groove 21, the striking block 2 can move normally along the axial direction, thereby forming an impact, so as to meet the needs of users who need the rotation impact function. The utility model changes the positional relationship between the stop pin 4 and the annular groove 21 by changing the axial position of the adjustment ring 3, thereby realizing the switching of the two functions of the rotation function and the rotation impact function. The utility model has a simple structure, is easy to operate, and has a high production and promotion value.

[0040] In order to movably set the shift ring 3 on the outer wall of the gear box 1, refer to Figure 1 , Figure 2 and Figure 5 As shown, the shift ring 3 in this embodiment includes a mounting portion 31 and an abutting portion 32. The mounting portion 31 is movably arranged on the outer wall of the gear box 1 along the axial direction, and the first end of the stop pin 4 abuts against the inner wall of the abutting portion 32. The connection between the mounting portion 31 and the outer wall of the gear box 1 can be a threaded connection, or a movable connection such as a sliding connection.

[0041] For example, refer to Figure 1 , Figure 3 and Figure 5As shown, in this embodiment, the inner wall of the mounting portion 31 is provided with an internal thread 311, the outer wall of the gear box 1 is provided with an external thread 12, and the mounting portion 31 is screwed onto the outer wall of the gear box 1. Through the cooperation between the internal thread 311 and the external thread 12, the user only needs to rotate the adjusting ring 3 to achieve the effect of axial movement of the adjusting ring 3 on the outer wall of the gear box 1. The operation is very convenient, and it is easy to observe the distance of axial movement of the adjusting ring 3, so as to prevent the inner wall of the adjusting ring 3 from being separated from the first end of the stop pin 4.

[0042] Specifically, the guide surface 5 in this embodiment is arranged on the inner wall of the abutment portion 32, and the inner diameter of the guide surface 5 gradually increases or decreases in whole or in part along the axial direction. When the adjusting ring 3 is displaced in the axial direction, the position where the first end of the stop pin 4 abuts against the guide surface 5 is also changed, so that the stop pin 4 is displaced in the radial direction, and finally the stop pin 4 switches back and forth between the two states of being inserted in the annular groove 21 or being separated from the annular groove 21.

[0043] For example, refer to Figure 1 , Figure 2 and Figure 5 As shown, the abutment portion 32 in this embodiment is arranged on the proximal outer wall of the mounting portion 31, and the inner diameter of the guide surface 5 gradually increases in whole or in part from the distal end to the proximal end. Specifically, the guide surface 5 in this embodiment includes a first guide surface 51 close to the distal end and a second guide surface 51 close to the proximal end. Both the first guide surface 51 and the second guide surface 52 are planes, and the inner diameter of the first guide surface 51 gradually increases from the distal end to the proximal end, and the inner diameter of the second guide surface 52 remains unchanged from the distal end to the proximal end.

[0044] It should be noted that, in the locked state, the first end of the stop pin 4 abuts against the inner wall of the abutment portion 32, the adjustment ring 3 is limited by the stop pin 4 and cannot move toward the proximal end, the second end of the stop pin 4 is inserted in the annular groove 21, and the striking block 2 cannot move axially. When the adjustment ring 3 moves toward the distal end under the operation of the user, the first end of the stop pin 4 always abuts against the guide surface 5. Since the inner diameter of the guide surface 5 gradually increases in whole or in part from the distal end to the proximal end, the first end of the stop pin 4 gradually moves away from the outer wall of the gear box 1, and the second end of the stop pin 4 also gradually moves away from the annular groove 21 until the second end of the stop pin 4 is separated from the annular groove 21. In this state, the striking block 2 can move axially.

[0045] Of course, the present application is not limited thereto. In other embodiments, when the abutment portion 32 is disposed on the proximal outer wall of the mounting portion 31 and the inner diameter of the guide surface 5 gradually decreases from the distal end to the proximal end, when the stop pin 4 abuts against the portion of the guide surface 5 closest to the distal end, the second end of the stop pin 4 is farthest from the annular groove 21, that is, the stop pin 4 is separated from the annular groove 21; when the stop pin 4 abuts against the portion of the guide surface 5 closest to the proximal end, the second end of the stop pin 4 is closest to the annular groove 21, that is, the stop pin 4 is inserted into the annular groove 21. Or, when the abutment portion 32 is disposed on the distal outer wall of the mounting portion 31, the inner diameter of the guide surface 5 gradually increases or decreases from the distal end to the proximal end, which can also achieve the same effect, and the working principle is not repeated here. The above schemes can all achieve the purpose of the utility model, and do not deviate from the design concept and purpose of the utility model. Therefore, those skilled in the art should understand that these technical schemes should all be within the protection scope of the utility model.

[0046] For example, refer to Figure 5 As shown, the guide surface 5 in this embodiment is a combination of two planes. Of course, the present application is not limited thereto, and the guide surface 5 in other embodiments may also be one or more curved surfaces, or one or more planes, or more than or equal to three planes, or a combination of several planes and several curved surfaces, as long as the inner diameter of the guide surface 5 gradually increases or decreases in whole or in part along the axial direction.

[0047] Preferably, refer to Figure 5 , Figure 6 As shown, the mounting portion 31 in this embodiment is provided with a first abutting surface 312 on the end surface facing the abutting portion 32, and in the locked state, the side wall of the stop pin 4 abuts against the first abutting surface 312. The abutting portion 32 in this embodiment is provided with a second abutting surface 321 on the inner wall facing the mounting portion 31, and in the locked state, the surface of the stop pin 4 away from the annular groove 21 abuts against the second abutting surface 321. According to this design, the excessive axial movement of the adjusting ring 3 can be avoided, the excessive insertion of the stop pin 4 into the annular groove 21 can be prevented, and the excessive force between the stop pin 4 and the annular groove 21 can be avoided. Of course, the present application is not limited to this. In other embodiments, if only the first abutting surface 312 or only the second abutting surface 321 is provided, the same technical effect can be achieved, and all should be within the protection scope of the present utility model.

[0048] Preferably, in order to prevent the stop pin 4 from being separated from the gear box 1 when the adjusting ring 3 is displaced in the axial direction, the maximum distance from the guide surface 5 to the gear box 1 in this embodiment is smaller than the length of the stop pin 4 .

[0049] Specifically, refer to Figure 6As shown, the stop pin 4 in this embodiment includes a head 41 and a rod 42, the outer diameter of the head 41 is larger than the aperture of the through hole 11, and the outer diameter of the rod 42 is smaller than the aperture of the through hole 11. Through the structural design of the stop pin 4, the rod 42 can be inserted into the through hole 11 and the head 41 is located outside the gear box 1, preventing the stop pin 4 from falling into the internal space of the gear box 1.

[0050] Further, refer to Figure 6 As shown, the electric tool in this embodiment further includes an elastic member 6 sleeved on the rod 42, the first end of the elastic member 6 abuts against the head 41, and the second end of the elastic member 6 abuts against the outer wall of the gear box 1, so that the stop pin 4 has a tendency to move away from the annular groove 21. The elastic member 6 can be a spring, or a spring, or a silicon capsule with elastic force. According to this design, when the adjusting ring 3 is displaced in the axial direction, the stop pin 4 can be directly pushed outward under the action of the elastic member 6 to ensure that the stop pin 4 is separated from the striking block 2.

[0051] Preferably, refer to Figure 6 As shown, the surface 411 of the stop pin 4 in this embodiment away from the annular groove 21 is an arc surface. According to this design, the contact between the head 41 and the inner wall of the adjusting ring 3 can be set as a point contact. When the adjusting ring 3 moves in the axial direction, the sliding friction between the stop pin 4 and the adjusting ring 3 can be reduced, thereby increasing the service life of the adjusting ring 3 and the stop pin 4.

[0052] Optional, see Figure 1 , Figure 2 As shown, the gear box 1 in this embodiment is provided with a plurality of through holes 11 along the circumferential direction, and the electric tool includes a plurality of stop pins 4 arranged along the circumferential direction. By providing a plurality of stop pins 4, when the stop pins 4 are inserted into the annular grooves 21, the striking block 2 can be uniformly limited along the circumferential direction, thereby avoiding uneven force and preventing the risk of the stop pins 4 breaking.

[0053] It can be seen from the above technical solutions that the utility model has the following beneficial effects:

[0054] The utility model adjusts the positional relationship between the stop pin and the ring groove by changing the axial position of the regulating ring, thereby realizing the back and forth switching of the two functions of the rotation function and the rotation impact function; the utility model is easy to operate, simple in structure, and has high production and promotion value.

[0055] It should be noted that, in order to describe the structure more clearly, the term "distal end" is defined here to mean the end away from the operator during operation, and the term "proximal end" is defined here to mean the end close to the operator during operation. Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0056] 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 regarded as 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 regarded as limiting the claim to which it relates.

[0057] 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 description 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 embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An electric tool, characterized in that: The electric tool comprises: A gear box (1), wherein the gear box (1) is provided with a through hole (11); A striking block (2) is axially arranged in the gear box (1), and an outer side wall of the striking block (2) is provided with a concave annular groove (21); A shift ring (3) is movably arranged on the outer wall of the gear box (1) in the axial direction; A stop pin (4), wherein a first end of the stop pin (4) abuts against an inner wall of the adjusting ring (3), and a second end of the stop pin (4) radially penetrates the through hole (11); The adjusting ring (3) and / or the stop pin (4) are provided with a guide surface (5), and the guide surface (5) is used to convert the axial movement of the adjusting ring (3) into the radial movement of the stop pin (4). In the locked state, the stop pin (4) is inserted into the annular groove (21) of the striking block (2), and in the unlocked state, the stop pin (4) is separated from the annular groove (21).

2. The electric tool according to claim 1, characterized in that: The shift adjustment ring (3) comprises a mounting portion (31) and an abutment portion (32); the mounting portion (31) is movably arranged on the outer wall of the gear box (1) along the axial direction, and the first end of the stop pin (4) abuts against the inner wall of the abutment portion (32).

3. The electric tool according to claim 2, characterized in that: The guide surface (5) is arranged on the inner wall of the abutment portion (32), and the inner diameter of the guide surface (5) gradually increases or decreases in whole or in part along the axial direction.

4. The electric tool according to claim 3, characterized in that: The abutment portion (32) is arranged on the proximal outer wall of the mounting portion (31), and the inner diameter of the guide surface (5) gradually increases in whole or in part in the direction from the distal end to the proximal end.

5. The electric tool according to claim 2, characterized in that: A first abutment surface (312) is provided on the end surface of the mounting portion (31) facing the abutment portion (32), and in a locked state, the side wall of the stop pin (4) abuts against the first abutment surface (312); and / or, A second abutment surface (321) is provided on the inner wall of the abutment portion (32) facing the mounting portion (31); in a locked state, the surface of the stop pin (4) away from the annular groove (21) abuts against the second abutment surface (321).

6. The electric tool according to claim 2, characterized in that: The inner wall of the mounting portion (31) is provided with an internal thread (311), the outer wall of the gear box (1) is provided with an external thread (12), and the mounting portion (31) is screwed onto the outer wall of the gear box (1).

7. The electric tool according to claim 1, characterized in that: The maximum distance from the guide surface (5) to the gear box (1) is smaller than the length of the stop pin (4).

8. The electric tool according to claim 1, characterized in that: The stop pin (4) comprises a head (41) and a rod (42) passing through the through hole (11), and the electric tool further comprises an elastic member (6) sleeved on the rod (42), a first end of the elastic member (6) abutting against the head (41), and a second end of the elastic member (6) abutting against the outer wall of the gear box (1), so that the stop pin (4) has a tendency to move away from the annular groove (21).

9. The electric tool according to claim 1, characterized in that: The surface of the stop pin (4) away from the annular groove (21) is an arc surface.

10. The electric tool according to claim 1, characterized in that: The gear box (1) is provided with a plurality of through holes (11) along the circumferential direction, and the electric tool comprises a plurality of stop pins (4) arranged along the circumferential direction; and / or, The guide surface (5) comprises at least one of a flat surface and a curved surface.

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