CN220561415U - Automatic wrench - Google Patents

Abstract

The utility model provides an automatic wrench, and relates to the field of wrenches. Comprises a connecting handle and a shell arranged at one end of the connecting handle, wherein a fluted disc is rotationally arranged in the shell, a spanner head mounting hole is arranged in the center of the fluted disc, and a plurality of semicircular teeth are arranged on the outer wall of the fluted disc; a plurality of first lock columns and second lock columns are penetrated in the shell at intervals, one end of the first lock columns is abutted with a first pressure spring arranged in the shell, the other end of the first lock columns protrudes out of the end face of the upper cover plate, and the number of the first lock columns, the number of the second lock columns and the number of the arc-shaped grooves are the same and correspond to the number of the arc-shaped grooves; the first lock column and the second lock column are respectively provided with a first notch and a second notch, the lower bottom surfaces of the first notch and the second notch form an inclined acute angle with the axis of the first lock column, the heights of the first notch and the second notch are larger than the thickness of the annular flange, and the inclined directions of the inclined surfaces of the first notch and the second notch are opposite. The ratchet automatic wrench has the advantages of simple structure, firmness, reliability, stronger torsion strength compared with the existing ratchet automatic wrench, more convenient and quick use, and multiplication of the maximum torque which can be transmitted.

Description

Automatic wrench

Technical Field

The utility model relates to the field of wrenches, in particular to an automatic wrench.

Background

The automatic wrench used in many industries is an automatic wrench with a ratchet structure, but the automatic wrench has the following problems in use.

The strength of the ratchet pawl in the wrench is insufficient, and only one pawl is usually clamped in the ratchet teeth of the ratchet wheel, so that the volume of the ratchet wheel and the pawl clamped in each other is not quite large, the transmitted limit torque is not quite large, and further, because of the structural limitation of the ratchet pawl unidirectional transmission mechanism, more pawls cannot be arranged in the automatic wrench to increase the strength, otherwise, the volume of the wrench head is quite large, and the wrench head is difficult to rotate in a small space in use. When the screw pretightening force is large, the automatic wrench only fast tightens the screw to a certain extent, and a fixed wrench is used when the screw pretightening force is really pretightening, otherwise, the ratchet wrench is easy to damage. Therefore, in some occasions where pretightening force is needed to be large, fixed wrenches are also used, for example, fixed wrenches are often used when replacing tires of automobiles. Still other ratchet-pawl automatic wrenches have a fixed wrench at one end. Thus, the carrying capacity of the tool is increased, so that the work which can be completed by carrying two wrenches with different sizes at the original time is carried out by carrying two wrenches. Therefore, the automatic wrench in the prior art has certain limitation in use and cannot be used in occasions needing larger screw pretightening force.

Disclosure of Invention

The utility model aims to provide an automatic wrench which has a simple structure, is firm and reliable, has stronger torsion strength compared with the existing ratchet automatic wrench, is more convenient and quick to use, and can multiply the maximum torque.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the automatic wrench comprises a connecting handle and a shell arranged at one end of the connecting handle, wherein a fluted disc is rotationally arranged in the shell, a wrench head mounting hole is formed in the center of the fluted disc, an annular flange is arranged on the outer wall of the fluted disc, and a plurality of semicircular teeth are formed in the outer wall of the annular flange; an upper cover plate is embedded in one side end face of the shell, a lower cover plate is arranged in the other side end face of the shell, and the fluted disc is limited in the shell by the upper cover plate and the lower cover plate; an adjusting cover plate is arranged on the outer side of the upper cover plate, a plurality of arc-shaped grooves are formed in the end face, facing one side of the upper cover plate, of the adjusting cover plate, the adjusting cover plate is sleeved on the part, protruding out of the upper cover plate, of the fluted disc, and a rotating gap is formed between the adjusting cover plate and the fluted disc;

a plurality of first lock columns and second lock columns penetrate through the shell, and the first lock columns and the second lock columns penetrate through the semicircular teeth at intervals in a crossing mode; one end of the first lock column and one end of the second lock column are in butt joint with a first pressure spring arranged in the shell, and the other end of the first lock column and the other end of the second lock column are protruded out of the end face of the upper cover plate, wherein the number of the first lock column, the number of the second lock column and the number of the arc-shaped grooves are the same, and the arc-shaped grooves correspond to one end of the first lock column or one end of the second lock column; the first lock column and the second lock column face one side of the semicircular tooth respectively and are provided with a first notch and a second notch, the depth of the first notch and the depth of the second notch are equal to the radius of the first notch, the included angle between the lower bottom surface of the first notch and the axis of the first lock column is an acute angle, the heights of the first notch and the second notch are larger than the thickness of the annular flange, and the inclination directions of the inclined surfaces of the first notch and the second notch are opposite.

Further, in the present utility model, the first notch and the second notch are right trapezoid notches, the shortest distance between the inclined surface of the right trapezoid notch and the opposite side thereof is larger than the thickness of the annular flange, and the inclined surface of the right trapezoid notch is inclined at an angle of 5 ° to 25 °.

Further, in the utility model, one end of each of the first lock column and the second lock column is provided with a first square block, an adaptive first square hole is formed in the shell corresponding to the first square block, the first pressure spring is arranged in the first square hole, and the first square block is positioned in the first square hole and is abutted against the first pressure spring; the other ends of the first lock column and the second lock column are arc-shaped.

Further, in the present utility model, the depth of the arc-shaped groove is identical to the length of the first lock cylinder and the second lock cylinder protruding from the upper cover plate in the extended state and the height of the inclined surfaces of the first lock cylinder and the second lock cylinder.

Further, in the utility model, the side wall of the adjusting cover plate is provided with a handle; and a clamp spring is embedded at one end of the fluted disc, which is close to the adjusting cover plate, and is used for limiting the adjusting cover plate.

Further, in the utility model, the shell is connected with the upper cover plate and the lower cover plate respectively through screws.

The application also provides an automatic wrench, which comprises a connecting handle and a shell arranged at two ends of the connecting handle, wherein a fluted disc is rotationally arranged in the shell, a tooth hole is formed in the center of the fluted disc, an annular flange is arranged on the outer wall of the fluted disc, and a plurality of semicircular teeth are formed in the outer wall of the annular flange; an upper cover plate is embedded in one side end face of the shell, a lower cover plate is arranged in the other side end face of the shell, and the fluted disc is limited in the shell by the upper cover plate and the lower cover plate;

a plurality of third lock columns penetrate through the shell, the plurality of third lock columns penetrate through the plurality of semicircular teeth at intervals, one end of each third lock column is in butt joint with a second pressure spring arranged in the shell, and the other end of each third lock column is embedded in the upper cover plate; the third lock column is provided with a notch III with the depth being the radius of the notch III towards one side of the semicircular tooth, the lower bottom surface of the notch III and the axis included angle of the third lock column are inclined at an acute angle, and the height of the notch III is larger than the thickness of the annular flange.

Further, in the utility model, a second square block is arranged at one end of the third lock column, an adaptive second square hole is formed in the shell corresponding to the second square block, the second pressure spring is positioned in the second square hole, and one end of the third lock column is positioned in the second square hole and is in butt joint with the second pressure spring.

Further, in the present utility model, the third slot is a right trapezoid slot, the shortest distance between the inclined surface of the right trapezoid slot and the opposite side thereof is larger than the thickness of the annular flange, and the inclined surface of the right trapezoid slot has an inclination angle of 5 ° to 25 °.

Further, in the utility model, the shell is connected with the upper cover plate and the lower cover plate respectively through screws.

The utility model has at least the following advantages or beneficial effects:

according to the utility model, the fluted disc with a plurality of semicircular teeth is rotationally arranged in the shell, the first lock column and the second lock column are arranged in the shell through the semicircular teeth, the notches are respectively arranged to be in fit and clamping connection with the semicircular teeth, the first lock column or the second lock column can be made to enter a use state through the rotation of the adjusting cover plate, the rotation direction or the locking direction of the fluted disc is limited through the limit between the notches and the semicircular teeth, and the wrench can be made to present two use working states of a left-handed/right-handed screwing bolt and a right-handed/left-handed unscrewing bolt through the lock columns with two notches with different inclined directions; the volume of the lock cylinder inclined plane embedded into the fluted disc semicircular tooth is far larger than that of the pawl embedded on the ratchet wheel in the prior art, so that the lock cylinder has stronger torsion strength, and the use strength can be doubled by a plurality of lock cylinders; through seting up the spanner head mounting hole in the fluted disc, removable different spanner heads improves the practicality of spanner.

According to the utility model, the fluted disc with a plurality of semicircular teeth is rotationally arranged in the shell, a plurality of third locking columns are arranged in the shell through the semicircular teeth, a notch III in an inclined direction is formed and is in fit and clamping connection with the semicircular teeth, the rotation direction or locking direction of the fluted disc is limited, and the screw can be screwed or unscrewed by rotating the automatic wrench; through setting up a plurality of lock posts of incline direction for spanner tow sides realize screwing up respectively or the state of loosening, can change the user state when spanner turns over the use, convenient to use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a partial cross-sectional view of a front view of an automatic wrench provided in example 1 of the present application;

FIG. 2 is a cross-sectional side view of the automated wrench provided in example 1 of the present application;

FIG. 3 is a front view of the automatic wrench according to embodiment 1 of the present application;

fig. 4 is a schematic structural diagram of a first lock cylinder provided in embodiment 1 of the present application;

fig. 5 is a schematic structural diagram of a second lock cylinder provided in embodiment 1 of the present application;

FIG. 6 is a partial cross-sectional view of a front view of an automatic wrench provided in example 2 of the present application;

FIG. 7 is a cross-sectional side view of an automated wrench provided in example 2 of the present application;

fig. 8 is a schematic structural diagram of a third lock cylinder according to embodiment 2 of the present application.

Icon: 100-connecting handles, 200-shells, 210-first square holes, 220-second square holes, 300-fluted discs, 310-annular flanges, 311-semicircular teeth, 320-spanner head mounting holes, 330-tooth holes, 340-clamp springs, 410-upper cover plates, 420-lower cover plates, 430-screws, 510-first lock posts, 511-first notch, 520-second lock posts, 521-second notch, 530-third lock posts, 531-third notch, 540-first pressure springs, 550-second pressure springs, 600-adjusting cover plates, 610-arc-shaped grooves, 620-handles, 710-first square blocks and 720-second square blocks.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

Referring to fig. 1-5, a schematic structure diagram of an automatic wrench according to an embodiment of the utility model is shown;

the embodiment provides an automatic wrench, which comprises a connecting handle 100 and a shell 200 arranged at one end of the connecting handle 100, wherein a fluted disc 300 is rotationally arranged in the shell 200, a wrench head mounting hole 320 is formed in the center of the fluted disc 300, an annular flange 310 is arranged on the outer wall of the fluted disc 300, and a plurality of semicircular teeth 311 are formed on the outer wall of the annular flange 310; an upper cover plate 410 is embedded in one side end surface of the shell 200, a lower cover plate 420 is arranged in the other side end surface of the shell 200, and the fluted disc 300 is limited in the shell 200 by the upper cover plate 410 and the lower cover plate 420; the outer side of the upper cover plate 410 is provided with an adjusting cover plate 600, the end surface of the adjusting cover plate 600 facing one side of the upper cover plate 410 is provided with a plurality of arc-shaped grooves 610, the adjusting cover plate 600 is sleeved on the part of the fluted disc 300 protruding out of the upper cover plate 410, and a rotation gap is reserved between the adjusting cover plate 600 and the fluted disc 300;

a plurality of first lock columns 510 and second lock columns 520 are penetrated in the shell 200, and the plurality of first lock columns 510 and the plurality of second lock columns 520 are respectively penetrated in the semicircular teeth 311 at cross intervals; one end of the first lock column 510 and one end of the second lock column 520 are abutted with the first pressure spring 540 arranged in the shell 200, and the other end of the first lock column 510 and the other end of the second lock column 520 are protruded out of the end face of the upper cover plate 410, wherein the number of the first lock column 510, the number of the second lock column 520 and the number of the arc-shaped grooves 610 are the same, and the arc-shaped grooves 610 correspond to one end of the first lock column 510 or one end of the second lock column 520; the first lock cylinder 510 and the second lock cylinder 520 are respectively provided with a notch I511 and a notch II 521 with the depth being the radius towards one side of the semicircular tooth 311, and the included angles between the lower bottom surfaces of the notch I511 and the notch II 521 and the axis of the first lock cylinder 510 are acute angles, wherein the heights of the notch I511 and the notch II 521 are larger than the thickness of the annular flange 310, and the inclined surfaces of the notch I511 and the notch II 521 are opposite in inclined direction.

Next, an automatic wrench according to the present exemplary embodiment will be further described.

In some embodiments of the present application, referring to fig. 1-2, a fluted disc 300 is rotatably disposed in the housing 200, the fluted disc 300 protrudes from an end surface of one side of the housing 200, an annular flange 310 is disposed on an outer wall of the fluted disc 300, a plurality of semi-circular teeth 311 are disposed on an outer wall of the annular flange 310, a wrench head mounting hole 320 is disposed in a center of the fluted disc 300, and wrench heads with different sizes can be replaced according to actual requirements by disposing the wrench head mounting hole 320, so as to improve practicability of the wrench; an upper cover plate 410 is embedded on one side end surface of the shell 200, the upper cover plate 410 is locked with the shell 200 through a screw 430, a lower cover plate 420 is arranged on the other side end surface of the shell 200, the lower cover plate 420 is locked with the shell 200 through the screw 430, the upper cover plate 410 and the lower cover plate 420 are connected with the shell 200 through the screw 430, the disassembly and the assembly are convenient, the processing inside the shell 200 is convenient, the upper cover plate 410 and the lower cover plate 420 limit the fluted disc 300 in the shell 200, and the fluted disc 300 is prevented from unscrewing the shell 200.

Referring to fig. 1-3, an adjusting cover plate 600 is disposed on the outer side of the upper cover plate 410, and the adjusting cover plate 600 is sleeved on a portion of the fluted disc 300 protruding from the upper cover plate 410, wherein a rotation gap is formed between the adjusting cover plate 600 and the fluted disc 300, that is, no connection exists between the adjusting cover plate 600 and the fluted disc 300, and rotation of the adjusting cover plate 600 does not drive the fluted disc 300 to rotate. A plurality of first lock columns 510 and second lock columns 520 are inserted into the housing 200, and the plurality of first lock columns 510 and the plurality of second lock columns 520 are respectively inserted into the semicircular teeth 311 at intersecting intervals, as shown in fig. 1, a represents the first lock column 510, and b represents the second lock column 520; the first lock column 510 and the second lock column 520 have one end abutting against the first compression spring 540 disposed in the casing 200, the other ends of the first lock column 510 and the second lock column 520 protrude from the end surface of the upper cover 410, and are arc-shaped, the end surface of the adjusting cover 600 facing the upper cover 410 is provided with a plurality of arc-shaped grooves 610, as shown in fig. 3, c represents the arc-shaped grooves 610, the depth of the arc-shaped grooves 610 is consistent with the length of the first lock column 510 and the second lock column 520 protruding from the upper cover 410 in the extended state, wherein the number of the first lock column 510, the number of the second lock column 520 and the number of the arc-shaped grooves 610 are the same, and the number of the arc-shaped grooves 610 corresponds to one end of the first lock column 510 or the second lock column 520, the rotation of the adjusting cover 600 can change the use state of the wrench, and the other lock column on which lock column can be sprung into the use state is pressed into the standby mode, i.e. when the arc-shaped grooves 610 of the adjusting cover 600 are located at the end of the first lock column 510, the first lock column 510 is correspondingly, the first lock column 510 is not compressed into the first lock column 510 under the action of the first compression spring 520, and the first lock column is not compressed into the first lock column 510 under the first state, and the first lock column is compressed into the first state, and the first lock column is not compressed into the first state, thereby the first lock column 510 is compressed into the first state, and the first lock column is compressed into the state is in the state is compressed state and is compressed.

As a preferred embodiment, referring to fig. 2, a clamp spring 340 is embedded in the end surface of the fluted disc 300 near one side of the adjusting cover plate 600, and the clamp spring 340 is used for limiting the adjusting cover plate 600 to prevent the adjusting cover plate 600 from being separated from the wrench when rotating. The side wall of the adjusting cover 600 is provided with a handle 620, and the rotating disk is conveniently rotated by providing the handle 620.

In some embodiments of the present application, referring to fig. 4-5, a first slot 511 and a second slot 521 with a depth equal to a radius of the first and second slots 510 and 521 are formed on a side of the first and second slots 520 facing the semicircular teeth 311, respectively, and the lower bottom surfaces of the first and second slots 511 and 521 form an inclined acute angle with the axis of the first slot 510, wherein the heights of the first and second slots 511 and 521 are greater than the thickness of the annular flange 310, specifically, the first and second slots 511 and 521 are right trapezoid slots, and the shortest distance between the inclined surfaces of the right trapezoid slots and the opposite sides of the right trapezoid slots is greater than the thickness of the annular flange 310, so that the semicircular teeth 311 of the fluted disc 300 can smoothly pass through the slots when the first or second slots 510 are in a compressed state, thereby avoiding the influence of the rest of the second slots 520 on the rotation of the fluted disc 300 when the first and second slots 510 are in an extended state. The inclined surfaces of the right trapezoid slots have an inclination angle of 5 ° -25 °, preferably 15 °, and the inclined surfaces of the first slot 511 and the second slot 521 have opposite inclination directions, so that the first lock cylinder 510 and the second lock cylinder 520 control the rotation direction of the fluted disc 300 to be opposite, respectively.

In a specific embodiment, when the rotation adjustment cover 600 corresponds to the plurality of first lock cylinders 510, the first lock cylinders 510 are in an extended state, and the plurality of second lock cylinders 520 are in a compressed state, and the notch two 521 is opposite to the semicircular tooth 311, so that the semicircular tooth 311 can just pass through the notch two 521, and is not affected by the second lock cylinders 520; when the first lock post 510 is extended, the inclined surface part of the first lock post 510 is clamped into the semicircular tooth 311 to play a unidirectional limiting role on the rotation of the fluted disc 300, the inclined surface direction of the first notch 511 is shown in fig. 3, when the connecting handle 100 of the wrench rotates clockwise, the direction of tightening the screw is the highest point of the inclined surface on the first lock post 510 faces to the anticlockwise direction, at this time, the highest point of the inclined surface on the first lock post 510 is higher than the bottom surface of the semicircular tooth 311, that is, the rotating wrench can drive the fluted disc 300 to rotate anticlockwise together through the first lock post 510 to loosen the screw, if the inclined surface on the lock post rotates clockwise, the inclined surface on the lock post is parallel with the bottom surface of the fluted disc 300, the first lock post 510 can be pressed downwards along the inclined surface in the sliding process, because the height h of the notch on the first lock post 510 is larger than the thickness of the fluted disc 300, and the fluted disc 300 can rotate from between the step notches on the lock posts. When the plurality of second lock columns 520 of the rotation adjustment cover 600 are opposite, the plurality of second lock columns 520 are in the extended state, and the plurality of first lock columns 510 are in the compressed state, and the direction of the inclined plane of the notch one 511 is opposite to the direction of the inclined plane of the notch two 521, so that the lock columns can drive the fluted disc 300 to rotate when the wrench is rotated clockwise at this time, which is the direction of screwing the screw. Therefore, the handle 620 on the wrench can be turned to the left and right directions at any time to tighten or loosen the screw.

As a preferred embodiment, one end of each of the first lock cylinder 510 and the second lock cylinder 520 is provided with a first square block 710, an adapted first square hole 210 is formed in the housing 200 corresponding to the first square block 710, the first compression spring 540 is disposed in the first square hole 210, and the first square block 710 is disposed in the first square hole 210 and abuts against the first compression spring 540. Through setting up square piece spacing in square downthehole at the one end of first lock post 510 and second lock post 520 for first lock post 510 and second lock post 520 can receive the spacing of rotation direction, avoid it to take place free rotation, influence the use of spanner.

The application is through setting up the lock post and specific structural shape looks adaptation of two different spiral directions and the semicircle tooth 311 of fluted disc 300, through adjusting the service condition of apron 600 selection spanner, can clockwise for tightening screw 430, anticlockwise for unscrewing screw. Compared with the existing ratchet automatic wrench, the blocking object volume inlaid in the semicircular tooth 311 is far larger than the volume of the ratchet clamped in by the pawl, and the lock column is rigidly connected with the shell 200 and the upper cover plate 410, so that the ratchet automatic wrench has stronger torsion strength, and under the condition that the wrench volume is unchanged, the ratchet wrench in the prior art can only be provided with one pawl, and the wrench can be provided with a plurality of lock columns, so that the strength can be multiplied during use. The wrench head mounting hole 320 is formed in the center of the fluted disc 300, so that the wrench can be replaced with wrench heads of different sizes, and when the wrench is used, the outer hexagonal socket wrench head and the inner hexagonal wrench head of different specifications can be mounted in the wrench head mounting square hole, so that the wrench is applicable to various scenes and the practicability is improved.

Example 2

Referring to fig. 6-8, a schematic structural diagram of an automatic wrench according to an embodiment of the utility model is shown;

the present embodiment provides an automatic wrench for fixing a hexagonal nut or a screw of a specification, which belongs to a general inventive concept as the automatic wrench in embodiment 1, includes the same specific technical features, belongs to two different forms, and includes a connection handle 100 and a housing 200 disposed at two ends of the connection handle 100, a fluted disc 300 is rotatably disposed in the housing 200, a tooth hole 330 is disposed in the center of the fluted disc 300, an annular flange 310 is disposed on an outer wall of the fluted disc 300, and a plurality of semicircular teeth 311 are disposed on an outer wall of the annular flange 310; an upper cover plate 410 is embedded in one side end surface of the shell 200, a lower cover plate 420 is arranged in the other side end surface of the shell 200, and the fluted disc 300 is limited in the shell 200 by the upper cover plate 410 and the lower cover plate 420;

a third locking column 530 is penetrated in the housing 200, a plurality of third locking columns 530 are penetrated in the plurality of semicircular teeth 311 at intervals, one end of the third locking column 530 is abutted with a second pressure spring 550 which is arranged in the housing 200, and the other end of the third locking column 530 is embedded in the upper cover plate 410; the third locking post 530 is provided with a third notch 531 with a radius facing the semi-circular tooth 311, and the bottom surface of the third notch 531 forms an acute angle with the axis of the third locking post 530, wherein the third notch 531 is higher than the annular flange 310.

Next, an automatic wrench according to the present exemplary embodiment will be further described.

In some embodiments of the present application, referring to fig. 6, unlike the embodiment 1, the above-mentioned automatic wrench is different from the embodiment 1 in that the housing 200 of the present embodiment is disposed at two ends of the connection handle 100, the tooth hole 330 is formed in the center of the tooth disc 300 in the housing 200, and the corresponding external hexagonal screw head can be sleeved in the tooth hole 330 to be screwed or unscrewed, and compared with the embodiment 1 automatic wrench, the wrench head mounting hole 320 of the embodiment 1 can be replaced, but the wrench head cannot be replaced, and the wrench of the embodiment is a fixed head automatic wrench, and the wrench of the embodiment 1 is in two different forms and applicable to two different scenes.

In some embodiments of the present application, referring to fig. 6, the plurality of third lock columns 530 are penetrated through the plurality of semicircular teeth 311 at intervals, one end of the third lock column 530 is abutted with the second pressure spring 550 which is built in the housing 200, and the other end of the third lock column 530 is embedded in the upper cover plate 410; referring to fig. 7-8, a third notch 531 with a depth equal to the radius of the third notch 531 is formed on one side of the third lock column 530 facing the semicircular tooth 311, and an included angle between the lower bottom surface of the third notch 531 and the axis of the third lock column 530 forms an acute angle, wherein the height of the third notch 531 is greater than the thickness of the annular flange 310; notch three 531 is also a right trapezoid notch in which the shortest distance between the inclined surface of the right trapezoid notch and its opposite side is greater than the thickness of annular flange 310, and the inclined surface of the right trapezoid notch is inclined at an angle of 5 ° -25 °, preferably 15 °. When the three-slot 531 is installed, the lowest point of the inclined surface of the three-slot 531 is flush with the bottom surface of the fluted disc 300, and the highest point of the inclined surface of the three-slot 531 is embedded with the side wall of the semicircular tooth 311. The third slot 531 of the present embodiment has the same structure as the first slot 511 and the slot in embodiment 1, so the working principle is the same, but the third lock posts 530 in the present embodiment have only the third slot 531 with one oblique direction, so the screw can be screwed up or unscrewed by using the third slot 531 in opposite directions compared with embodiment 1. That is, after the wrench is turned over, the use state of the housing 200 is opposite, if the screw is tightened clockwise when the wrench is used on the front side, the handle is rotated anticlockwise to slip, and if the wrench is used on the back side, the screw is unscrewed clockwise, and the handle is rotated anticlockwise to slip. And the structure of this embodiment is simpler than that of embodiment 1, and the forward and reverse use can be realized without rotating the adjusting cover plate 600.

As a preferred embodiment, a second square block 720 is disposed at one end of the third lock post 530, the housing 200 is provided with an adapted second square hole 220 corresponding to the second square block 720, the second compression spring 550 is located in the second square hole 220, and one end of the third lock post 530 is located in the second square hole 220 and abuts against the second compression spring 550. Through set up square piece and square hole in third lock post 530 one end and cooperate for third lock post 530 can receive rotation direction's spacing, avoids it to take place free rotation, influences the use of spanner.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The automatic wrench is characterized by comprising a connecting handle and a shell arranged at one end of the connecting handle, wherein a fluted disc is rotationally arranged in the shell, a wrench head mounting hole is formed in the center of the fluted disc, an annular flange is arranged on the outer wall of the fluted disc, and a plurality of semicircular teeth are formed on the outer wall of the annular flange; an upper cover plate is embedded in one side end face of the shell, a lower cover plate is arranged in the other side end face of the shell, and the fluted disc is limited in the shell by the upper cover plate and the lower cover plate; an adjusting cover plate is arranged on the outer side of the upper cover plate, a plurality of arc-shaped grooves are formed in the end face, facing one side of the upper cover plate, of the adjusting cover plate, the adjusting cover plate is sleeved on the part, protruding out of the upper cover plate, of the fluted disc, and a rotating gap is formed between the adjusting cover plate and the fluted disc;

a plurality of first lock columns and second lock columns penetrate through the shell, and the first lock columns and the second lock columns penetrate through the semicircular teeth at intervals in a crossing mode; one end of the first lock column and one end of the second lock column are in butt joint with a first pressure spring arranged in the shell, and the other end of the first lock column and the other end of the second lock column are protruded out of the end face of the upper cover plate, wherein the number of the first lock column, the number of the second lock column and the number of the arc-shaped grooves are the same, and the arc-shaped grooves correspond to one end of the first lock column or one end of the second lock column; the first lock column and the second lock column face one side of the semicircular tooth respectively and are provided with a first notch and a second notch, the depth of the first notch and the depth of the second notch are equal to the radius of the first notch, the included angle between the lower bottom surface of the first notch and the axis of the first lock column is an acute angle, the heights of the first notch and the second notch are larger than the thickness of the annular flange, and the inclination directions of the inclined surfaces of the first notch and the second notch are opposite.

2. The automatic wrench of claim 1, wherein the first and second slots are right trapezoid slots, a shortest distance between inclined surfaces of the right trapezoid slots and opposite sides thereof is greater than a thickness of the annular flange, and an inclination angle of the inclined surfaces of the right trapezoid slots is 5 ° -25 °.

3. The automatic wrench of claim 1, wherein one end of the first lock post and one end of the second lock post are respectively provided with a first square block, an adaptive first square hole is formed in the shell corresponding to the first square block, the first pressure spring is arranged in the first square hole, and the first square block is positioned in the first square hole and is abutted with the first pressure spring; the other ends of the first lock column and the second lock column are arc-shaped.

4. The automatic wrench of claim 1, wherein the depth of the arcuate recess corresponds to the length of the first and second lock posts protruding from the upper plate in the extended state.

5. The automatic wrench of claim 1, wherein the side wall of the adjustment cover plate is provided with a handle; and a clamp spring is embedded at one end of the fluted disc, which is close to the adjusting cover plate, and is used for limiting the adjusting cover plate.

6. The automatic wrench of claim 1, wherein the housing is connected to the upper cover plate and the lower cover plate by screws, respectively.

7. The automatic wrench is characterized by comprising a connecting handle and a shell arranged at two ends of the connecting handle, wherein a fluted disc is rotationally arranged in the shell, a tooth hole is formed in the center of the fluted disc, an annular flange is arranged on the outer wall of the fluted disc, and a plurality of semicircular teeth are formed in the outer wall of the annular flange; an upper cover plate is embedded in one side end face of the shell, a lower cover plate is arranged in the other side end face of the shell, and the fluted disc is limited in the shell by the upper cover plate and the lower cover plate;

a plurality of third lock columns penetrate through the shell, the plurality of third lock columns penetrate through the plurality of semicircular teeth at intervals, one end of each third lock column is in butt joint with a second pressure spring arranged in the shell, and the other end of each third lock column is embedded in the upper cover plate; the third lock column is provided with a notch III with the depth being the radius of the notch III towards one side of the semicircular tooth, the lower bottom surface of the notch III and the axis included angle of the third lock column are inclined at an acute angle, and the height of the notch III is larger than the thickness of the annular flange.

8. The automatic wrench of claim 7, wherein a second square block is disposed at one end of the third lock post, an adapted second square hole is formed in the housing corresponding to the second square block, the second compression spring is disposed in the second square hole, and one end of the third lock post is disposed in the second square hole and abuts against the second compression spring.

9. The automated wrench of claim 7, wherein the third slot is a right trapezoid slot, a shortest distance between an inclined surface of the right trapezoid slot and an opposite side thereof is greater than a thickness of the annular flange, and an inclined surface of the right trapezoid slot is inclined at an angle of 5 ° to 25 °.

10. The automatic wrench of claim 7, wherein the housing is connected to the upper cover plate and the lower cover plate by screws, respectively.