Reverse rotation positioning structure of electric wrench

Abstract

The utility model relates to the technical field of electric wrenches, in particular to an electric wrench reverse rotation positioning structure which comprises a lower face cover, the surface of the lower face cover is fixedly connected with an upper face cover through a bolt, a rotatable gear ring is installed between the upper face cover and the lower face cover, and a torsional spring installation hole is formed in the surface of the gear ring. A movable claw is hinged to one side of the surface of the gear ring through a pin rod, and a positioning face is arranged on the surface of the movable claw. A fixed claw is installed on the side, away from the movable claw, of the gear ring, a reverse rotation positioning assembly is arranged between the lower face cover and the movable claw and comprises a blocking part and a reverse rotation part, the blocking part is installed on the surface of the lower face cover, and the reverse rotation part is connected to the surface of the movable claw. According to the electric wrench, the reversing positioning assembly is arranged, so that the electric wrench tool can be withdrawn conveniently, labor is saved when the electric wrench tool is taken down, and the labor intensity is reduced when the electric wrench is used.

Description

Technical Field

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

[0002] An electric wrench is a wrench powered by electricity or a battery. After the steel or rib sleeve is rotated and tightened by the electric wrench, the components held by the movable claw and the fixed claw are usually removed. However, the existing technology is not convenient enough to remove these components and requires a great deal of force to disassemble, so it is quite laborious, increasing the labor intensity during the use of the electric wrench and bringing great trouble to people's use. Therefore, a reverse positioning structure of an electric wrench is needed. Content of the Utility Model

[0003] The purpose of the utility model is to provide a reverse positioning structure of an electric wrench to solve the problem of inconvenience in removing the steel bar sleeve as mentioned in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A reverse positioning structure of an electric wrench, including a lower cover. The surface of the lower cover is fixedly connected with an upper cover through bolts, and a rotatable toothed ring is installed between the upper cover and the lower cover, and a torsion spring installation hole is provided on the surface of the toothed ring; One side of the surface of the toothed ring is hinged with a movable claw through a pin rod, and a positioning surface is arranged on the surface of the movable claw; A fixed claw is installed on the side of the toothed ring away from the movable claw, and the fixed claw and the movable claw cooperate to hold the workpiece to be tightened; A reverse positioning component is arranged between the lower cover and the movable claw, and this reverse positioning component is used to make the movable claw perform reverse rotation work; The reverse positioning component includes a blocking part and a reverse part. The blocking part is installed on the surface of the lower cover, the reverse part is connected to the surface of the movable claw, and the blocking part and the reverse part cooperate to make the movable claw reverse, so that the clamping opening of the movable claw is flush with the opening of the toothed ring.

[0005] Preferably, a movable claw torsion spring is sleeved on the surface of the pin rod, one end of the movable claw torsion spring is in close contact with the movable claw, and the other end of the movable claw torsion spring is inserted and fixed in the torsion spring installation hole on the surface of the toothed ring.

[0006] Preferably, the blocking part is composed of a positioning pin, a reverse fixing stop piece and an equal-height bolt. There are two groups of positioning pins, and the two groups of positioning pins are inserted and fixed on the surface of the lower cover.

[0007] Preferably, a reverse fixing stop piece is also arranged on the surface of the lower cover, and two groups of positioning pin holes are provided on the surface of the reverse fixing stop piece. The positioning pin holes are inserted and matched with the positioning pins to achieve positioning during installation. At the same time, the reverse fixing stop piece is fixedly connected to the surface of the lower cover through an equal-height bolt.

[0008] Preferably, the reverse portion includes a screw of equal height, a reverse movable flap, a gasket, and a reverse torsion spring. The reverse movable flap is disposed on the surface of the movable claw, and a torsion spring insertion hole is formed on the surface of the reverse movable flap.

[0009] Preferably, a reverse torsion spring is mounted on the surface of the reverse movable flap, and one end of the reverse torsion spring is fixedly inserted into the torsion spring insertion hole. A gasket is placed on the surface of the screw of equal height. One side of the gasket is provided with the screw of equal height. One end of the screw of equal height penetrates through the gasket, the reverse torsion spring, and the reverse movable flap and is fixedly connected to the surface of the movable claw.

[0010] Preferably, a limiting stop surface is provided on the surface of the movable claw, and one end of the reverse torsion spring is closely attached to the limiting stop surface.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: By providing a reverse positioning assembly in the reverse positioning structure of the electric wrench, the electric wrench causes the gear ring to reverse. The reverse rotation of the gear ring drives the movement of the movable claw. At this time, the openings of the lower cover and the upper cover are flush with the opening of the gear ring. Then, through the action of the reverse positioning assembly, the movable claw is pushed to fit with the surface of the gear ring after overcoming the elastic force of the movable claw torsion spring. At this time, the opening of the gear ring is flush with the clamping opening of the movable claw, so that the electric wrench tool can be withdrawn. Specifically, the reverse movable flap is blocked by the reverse fixed flap. When the reverse movable flap is blocked, the reverse torsion spring generates a reaction force and presses backward against the limiting stop surface, causing the movable claw to move around the pin rod after overcoming the elastic force of the movable claw torsion spring until the positioning surface is closely attached to the inner wall of the gear ring, resulting in the clamping opening of the movable claw being flush with the opening of the gear ring and the openings of the two shells, so that the electric wrench tool can be easily withdrawn and it is also relatively labor-saving to remove, thereby reducing the labor intensity during the use of the electric wrench. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a three-dimensional external structure schematic diagram of the present utility model;

[0013] Figure 2 is a partial exploded structure schematic diagram of the present utility model;

[0014] Figure 3 is a partial enlarged structure schematic diagram of the present utility model;

[0015] Figure 4 is an exploded structure schematic diagram of the present utility model in the upright state;

[0016] Figure 5 is an enlarged structure schematic diagram of the gear ring of the present utility model.

[0017] In the figure: 1. Lower cover; 2. Upper cover; 3. Tooth ring; 31. Torsion spring mounting hole; 4. Movable claw; 41. Positioning surface; 42. Limit stop surface; 43. Pin rod; 44. Movable claw torsion spring; 5. Reverse positioning assembly; 51. Blocking part; 511. Positioning pin; 512. Reverse fixing stop; 5121. Positioning pin hole; 513. Equal-height bolt; 52. Reverse part; 521. Equal-height screw rod; 522. Reverse movable stop; 5221. Torsion spring insertion hole; 523. Gasket; 524. Reverse torsion spring; 6. Fixed claw. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying 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. In addition, the terms "first", "second", "third", "upper, lower, left, right", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. At the same time, in the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a screwing connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

[0019] The structure of the reverse positioning structure of the electric wrench provided by the present invention is as Figure 1 、 Figure 3 and Figure 5 shown, including a lower cover 1. The surface of the lower cover 1 is fixedly connected with an upper cover 2 through bolts. A rotatable tooth ring 3 is installed between the upper cover 2 and the lower cover 1. A torsion spring mounting hole 31 is provided on the surface of the tooth ring 3. One side of the surface of the tooth ring 3 is hinged with a movable claw 4 through a pin rod 43. A positioning surface 41 is provided on the surface of the movable claw 4. A movable claw torsion spring 44 is sleeved on the surface of the pin rod 43. One end of the movable claw torsion spring 44 is in close contact with the movable claw 4, and the other end of the movable claw torsion spring 44 is inserted and fixed with the torsion spring mounting hole 31 on the surface of the tooth ring 3. A limit stop surface 42 is provided on the surface of the movable claw 4. A fixed claw 6 is installed on the side of the tooth ring 3 away from the movable claw 4. The fixed claw 6 and the movable claw 4 cooperate to perform the grasping work on the workpiece to be tightened.

[0020] During implementation, the movable jaw 4 is pressed forward around the pin rod 43 under the elastic force of the movable jaw torsion spring 44 and cooperates with the fixed jaw 6 to fix the steel bar sleeve to be tightened. Subsequently, when the electric wrench is started, the toothed ring 3 rotates forward to complete the tightening of the steel bar sleeve to be tightened. After tightening, the tool needs to be withdrawn from the steel bar or sleeve. At this time, the electric wrench causes the toothed ring 3 to rotate in reverse. The reverse rotation of the toothed ring 3 drives the movement of the movable jaw 4. At this time, the openings of the lower cover 1 and the upper cover 2 are flush with the opening of the toothed ring 3.

[0021] Further, as Figure 2 and Figure 3 shown, a reverse positioning assembly 5 is provided between the lower cover 1 and the movable jaw 4. The reverse positioning assembly 5 is used to make the movable jaw 4 perform reverse operation; the reverse positioning assembly 5 includes a blocking portion 51 and a reverse portion 52. The blocking portion 51 is installed on the surface of the lower cover 1, and the reverse portion 52 is connected to the surface of the movable jaw 4. The blocking portion 51 and the reverse portion 52 cooperate to make the movable jaw 4 reverse, so that the clamping opening of the movable jaw 4 is flush with the opening of the toothed ring 3 and the openings of the two shells. The blocking portion 51 is composed of a positioning pin 511, a reverse fixing retaining piece 512 and an equal-height bolt 513. There are two groups of positioning pins 511, and the two groups of positioning pins 511 are inserted and fixed on the surface of the lower cover 1. The surface of the lower cover 1 is also provided with a reverse fixing retaining piece 512, and two groups of positioning pin holes 5121 are opened on the surface of the reverse fixing retaining piece 512, and the positioning pin holes 5121 and the positioning pins 511 are inserted and matched with each other to realize the positioning work during installation. At the same time, the reverse fixing retaining piece 512 is fixedly connected to the surface of the lower cover 1 through the equal-height bolt 513.

[0022] During implementation, under the action of the reverse positioning assembly 5, the movable jaw 4 is pushed back to make the positioning surface 41 fit with the surface of the toothed ring 3 against the elastic force of the movable jaw torsion spring 44. At this time, the clamping opening of the movable jaw 4 is flush with the opening of the toothed ring 3 and the openings of the two shells, so that the electric wrench tool can be withdrawn.

[0023] Further, as Figure 3 and Figure 4 shown, the reverse portion 52 includes an equal-height screw rod 521, a reverse movable retaining piece 522, a gasket 523 and a reverse torsion spring 524. The reverse movable retaining piece 522 is arranged on the surface of the movable jaw 4, and a torsion spring insertion hole 5221 is opened on the surface of the reverse movable retaining piece 522. A reverse torsion spring 524 is installed on the surface of the reverse movable retaining piece 522, and one end of the reverse torsion spring 524 is inserted and fixed with the torsion spring insertion hole 5221, while the other end of the reverse torsion spring 524 is closely attached to the limit retaining surface 42; and a gasket 523 is placed on the surface of the equal-height screw rod 521. One side of the gasket 523 is provided with the equal-height screw rod 521, and one end of the equal-height screw rod 521 passes through the gasket 523, the reverse torsion spring 524 and the reverse movable retaining piece 522 and is fixedly connected to the surface of the movable jaw 4.

[0024] During implementation, the reverse fixed stop 512 blocks the reverse movable stop 522. When the reverse movable stop 522 is blocked, the reverse torsion spring 524 generates a reaction force that squeezes the limit stop surface 42 backward, causing the movable claw 4 to move around the pin 43 against the elastic force of the movable claw torsion spring 44 until the positioning surface 41 is in close contact with the inner wall of the gear ring 3, so that the opening of the gear ring 3 is flush with the clamping opening of the movable claw 4 and the openings of the two shells, thus facilitating the withdrawal of the electric wrench tool.

[0025] Working principle: During use, when the movable claw 4 is pressed forward around the pin 43 under the elastic force of the movable claw torsion spring 44 and cooperates with the fixed claw 6 to fix the steel bar sleeve to be tightened. Subsequently, after the electric wrench is started, the gear ring 3 rotates forward to complete the tightening of the steel bar sleeve to be tightened. After tightening, the tool needs to be withdrawn from the steel bar or sleeve. At this time, the electric wrench causes the gear ring 3 to rotate in reverse. The reverse rotation of the gear ring 3 drives the movement of the movable claw 4. At this time, the openings of the lower cover 1 and the upper cover 2 are flush with the opening of the gear ring 3. Then, through the action of the reverse positioning assembly 5, the movable claw 4 is pushed backward against the elastic force of the movable claw torsion spring 44 until the positioning surface 41 is in contact with the surface of the gear ring 3. At this time, the clamping opening of the movable claw 4 is flush with the opening of the gear ring 3 and the openings of the two shells, so that the tool can be withdrawn from the steel bar or sleeve.

[0026] During the implementation of the reverse positioning assembly 5, the reverse fixed stop 512 blocks the reverse movable stop 522. When the reverse movable stop 522 is blocked, the reverse torsion spring 524 generates a reaction force that squeezes the limit stop surface 42 backward, causing the movable claw 4 to move around the pin 43 against the elastic force of the movable claw torsion spring 44 until the positioning surface 41 is in close contact with the inner wall of the gear ring 3, so that the opening of the gear ring 3 is flush with the clamping opening of the movable claw 4 and the openings of the two shells, thus facilitating the withdrawal of the tool from the steel bar or sleeve, which is relatively labor-saving and thus reduces the labor intensity during the use of the electric wrench.

[0027] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any regard, 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 included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. An electric wrench reverse positioning structure, comprising a lower cover (1), characterized in that: The surface of the lower cover (1) is fixedly connected to the upper cover (2) by bolts, and a rotatable toothed ring (3) is installed between the upper cover (2) and the lower cover (1), and a torsion spring installation hole (31) is provided on the surface of the toothed ring (3); a movable claw (4) is hingedly connected to one side of the surface of the toothed ring (3) by a pin rod (43), and a positioning surface (41) is provided on the surface of the movable claw (4); a fixed claw (6) is installed on the side of the toothed ring (3) away from the movable claw (4), and the fixed claw (6) cooperates with the movable claw (4) to grasp the wrench to be treated. A reversal positioning assembly (5) is provided between the lower cover (1) and the movable claw (4), and the reversal positioning assembly (5) is used to make the movable claw (4) perform a reversal operation; the reversal positioning assembly (5) comprises a blocking portion (51) and a reversal portion (52), the blocking portion (51) is mounted on the surface of the lower cover (1), the reversal portion (52) is connected to the surface of the movable claw (4), and the blocking portion (51) and the reversal portion (52) cooperate to make the movable claw (4) reverse, so that the clamping opening of the movable claw (4) is flush with the opening of the gear ring (3).

2. The electric wrench reversal positioning structure according to claim 1, characterized in that: A movable claw torsion spring (44) is sleeved on the surface of the pin rod (43), one end of the movable claw torsion spring (44) is tightly attached to the movable claw (4), and the other end of the movable claw torsion spring (44) is plugged and fixed to the torsion spring mounting hole (31) on the surface of the gear ring (3).

3. The electric wrench reversal positioning structure according to claim 1, characterized in that: The blocking portion (51) is composed of a positioning pin (511), a reverse fixing blocking sheet (512) and equal height bolts (513). The positioning pin (511) is provided in two groups, and the two groups of positioning pins (511) are plugged and fixed on the surface of the lower cover (1).

4. The electric wrench reversal positioning structure according to claim 3, characterized in that: The surface of the lower cover (1) is also provided with a reverse fixing baffle (512), and the surface of the reverse fixing baffle (512) is provided with two groups of positioning pin holes (5121), and the positioning pin holes (5121) and the positioning pins (511) are plugged into each other to achieve positioning during installation, and at the same time, the reverse fixing baffle (512) is fixedly connected to the surface of the lower cover (1) by equal height bolts (513).

5. The electric wrench reversal positioning structure according to claim 1, characterized in that: The reversing portion (52) comprises a screw rod (521) of equal height, a reversing movable baffle (522), a gasket (523) and a reversing torsion spring (524); the reversing movable baffle (522) is arranged on the surface of the movable claw (4), and a torsion spring insertion hole (5221) is provided on the surface of the reversing movable baffle (522).

6. The electric wrench reversal positioning structure according to claim 5, characterized in that: A reversing torsion spring (524) is installed on the surface of the reversing movable baffle (522), and one end of the reversing torsion spring (524) is inserted and fixed with the torsion spring insertion hole (5221), and a gasket (523) is placed on the surface of the equal height screw rod (521), and one side of the gasket (523) is provided with the equal height screw rod (521), and one end of the equal height screw rod (521) penetrates the gasket (523), the reversing torsion spring (524) and the reversing movable baffle (522) and is fixedly connected to the surface of the movable claw (4).

7. The electric wrench reversal positioning structure according to claim 1, characterized in that: A limit stop surface (42) is provided on the surface of the movable claw (4), and one end of the reverse torsion spring (524) is in close contact with the limit stop surface (42).

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