CN111015563B

CN111015563B - Socket spanner

Info

Publication number: CN111015563B
Application number: CN201911312457.5A
Authority: CN
Inventors: 王龙; 李小强; 曾凡乐; 曾浩
Original assignee: Beisit Electric Tech Hangzhou Co ltd
Current assignee: Beisit Electric Tech Hangzhou Co ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2022-03-11
Anticipated expiration: 2039-12-18
Also published as: CN111015563A

Abstract

The invention discloses a socket wrench, which comprises a base, a wrench sleeve and a connecting piece, wherein the wrench sleeve and the connecting piece are arranged on one side of the base; one end of the wrench sleeve, which is far away from the base, is provided with a wrench hole which is concave inwards and used for sleeving a first workpiece to be twisted; one of the contact surfaces of the wrench sleeve and the base is provided with a groove with gradually reduced inner diameter, and the other one is provided with a boss which is matched with the groove and is used for being inserted into the groove; at least one cross section of the groove is non-circular; a limiting cap is arranged at one end of the connecting piece inserted into the wrench hole along the boss and the groove; the wrench sleeve is internally provided with a limiting platform matched with the limiting cap. This box spanner avoids the spanner cover to follow first work piece rotation of waiting to twist through the cooperation of recess and boss, and under the effect of connecting piece moreover, recess and boss part break away from and produce the clearance, improves the power of unloading effect through the fine motion of the two, avoids the spanner hole to block that first work piece of waiting to twist can't be detached. The inclined side walls of the grooves and the bosses which are matched with each other can guide the spanner sleeve and the base to return smoothly, so that the next operation is facilitated.

Description

Socket spanner

Technical Field

The invention relates to the field of wrenches, in particular to a socket wrench.

Background

When the work piece is treated to twist in the box spanner clamping of present market, box spanner easily receives to treat to twist the effort between work piece and the box spanner and leads to box spanner's wrench hole and treat to twist the work piece assembly tension, and then leads to box spanner and treats that it is difficult for droing to twist the work piece, influences box spanner's installation effectiveness. And if the clearance between the wrench hole and the workpiece to be screwed is increased to avoid over-tight assembly of the wrench hole and the workpiece to be screwed, the wrench hole can rotate along with the workpiece to be screwed, and the effect of the socket wrench cannot be realized.

Therefore, how to avoid the socket wrench from clamping the workpiece to be twisted and realize the easy and quick separation of the socket wrench and the workpiece to be twisted becomes a problem to be solved by technical personnel in the field.

Disclosure of Invention

The invention aims to provide a socket wrench, which can prevent a to-be-screwed workpiece from being clamped by the socket wrench and being incapable of being disassembled, and further improve the installation efficiency of the socket wrench.

In order to achieve the purpose, the invention provides a socket wrench, which comprises a base, a wrench sleeve and a connecting piece, wherein the wrench sleeve and the connecting piece are arranged on one side of the base; one end of the wrench sleeve, which is far away from the base, is provided with a wrench hole which is concave inwards and used for sleeving a first workpiece to be twisted; one of the contact surfaces of the wrench sleeve and the base is provided with a groove with gradually reduced inner diameter, and the other contact surface of the wrench sleeve and the base is provided with a boss which is matched with the groove and is used for being inserted into the groove; at least one cross section of the groove is non-circular; a limiting cap is arranged at one end of the connecting piece, which is inserted into the wrench hole along the boss and the groove; a limiting table matched with the limiting cap is arranged in the wrench sleeve;

when the wrench sleeve is detached from the first workpiece to be twisted, the boss and the groove are axially separated until the limiting table is in contact with the limiting cap.

Preferably, the groove is arranged on the base; the boss is arranged on the wrench sleeve.

Preferably, the shape of the groove is a regular frustum.

Preferably, the connecting piece comprises the limiting cap and a stud fixed on one side of the limiting cap; a threaded blind hole for inserting the stud is formed in the groove; and a through hole for inserting the stud is formed in the boss.

Preferably, the through hole is provided as a counter-bore; the limiting table is formed by a limiting table surface with the inward sinking of the counter sink.

Preferably, the base is provided with a plurality of said recesses to which a plurality of said wrench sleeves are selectively connected by a plurality of said connectors.

Preferably, the wrench sleeve comprises a cylindrical sleeve and a framework inserted and fixed in the sleeve; the wrench hole is arranged on the sleeve; the boss is arranged on the framework.

Preferably, the frame has a frame boss for closely fitting with a sidewall of the wrench hole to achieve an interference connection, or,

the framework boss of the framework is welded in the wrench hole.

Preferably, the skeleton further comprises a skeleton body to be coaxial with the sleeve; the three framework bosses uniformly surround the periphery of the framework body.

Preferably, the skeleton is close to the one end in spanner hole is equipped with the heavy groove that inwards caves in, is used for supplying the second to wait to twist the work piece and stretches into, and/or, the sleeve is kept away from the one end of base still is connected in the protection gasket that is used for avoiding the contact of work piece plane.

Compared with the prior art, the socket wrench provided by the invention comprises a base, a wrench sleeve and a connecting piece, wherein the wrench sleeve is arranged on one side of the base.

One end of the wrench sleeve, which is far away from the base, is provided with a wrench hole for sleeving a first workpiece to be twisted.

One of the contact surfaces of the spanner sleeve and the base is provided with a groove with gradually reduced inner diameter, and the other one is provided with a lug boss which is matched with the groove and is used for being inserted into the groove. The wrench sleeve and the base are assembled through concave-convex embedding of the groove and the boss and connected through the connecting piece, at least one cross section of the groove is non-circular, the groove and the boss are both provided with non-rotary structures, when the wrench hole and a first workpiece to be screwed are installed and the base is rotated, the wrench sleeve rotates synchronously along with the base and cannot rotate along with the first workpiece to be screwed, and therefore the first workpiece to be screwed is screwed and unscrewed through the wrench hole.

The connecting piece inserts to the downthehole one end of spanner along boss and recess and is equipped with spacing cap, be equipped with in the spanner cover for with spacing cap complex spacing platform, when the boss inserts the recess completely, spacing cap and spacing platform interval are at a certain distance, when unloading from the spanner hole and the first work piece of waiting to twist, boss and recess break away from along the axial of connecting piece, until spacing platform and spacing cap contact, prevent boss and recess thoroughly separation.

In the process, because the internal diameter of recess convergent, correspondingly the radial dimension of boss is gradually expanded, consequently, recess and boss are along the in-process that the axial breaks away from, the lateral wall of recess and the lateral wall of boss produce little clearance, can realize that spanner cover rocks for the base, nevertheless because of recess and boss are non-solid of revolution structure, consequently rock in-process spanner hole and be unlikely to rotate along with first work piece that waits to twist, but through the external force work aggravation spanner hole and the first relative motion between the work piece that waits to twist, improve spanner cover and first area and twist the power of unloading effect of work piece, realize simply, fast detaching socket spanner and first work piece that waits to twist.

Meanwhile, the base and the wrench sleeve are connected with the connecting piece all the time, and after the groove and the boss are separated, the base and the wrench sleeve can be guided to quickly return to a completely matched state under the action of self weight in a matched relationship with each other, so that the next operation is facilitated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a socket wrench according to an embodiment of the present invention;

FIG. 2 is a schematic view of the assembly of the sleeve and the frame according to the embodiment of the present invention;

FIG. 3 is a cross-sectional view at A-A of FIG. 2;

fig. 4 is a schematic structural diagram of a first base according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view at B-B of FIG. 4;

FIG. 6 is a schematic structural diagram of a connector according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view of a connector according to an embodiment of the present invention taken along an axial direction;

fig. 8 is a schematic structural diagram of a second base according to an embodiment of the present invention;

FIG. 9 is a cross-sectional view taken at D-D of FIG. 8;

FIG. 10 is a schematic view of a second embodiment of a base and a plurality of wrench sleeves according to the present invention;

fig. 11 is a cross-sectional view at C-C of fig. 10.

The device comprises a fastening screw, a 2-spanner sleeve, a 21-sleeve, a 22-framework, a 221-boss, a 222-counter bore, a 2221-limiting table top, a 223-framework boss, a 224-framework body, a 225-counter bore, a 3-connecting piece, a 31-limiting cap, a 32-stud, a 33-cutter slot, a 4-base, a 41-groove, a 411-threaded blind hole, a 42-base mounting hole and a 5-protective gasket.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 11, fig. 1 is a schematic structural diagram of a socket wrench according to an embodiment of the present invention; FIG. 2 is a schematic view of the assembly of the sleeve and the frame according to the embodiment of the present invention; FIG. 3 is a cross-sectional view at A-A of FIG. 2; fig. 4 is a schematic structural diagram of a first base according to an embodiment of the present invention; FIG. 5 is a cross-sectional view at B-B of FIG. 4; FIG. 6 is a schematic structural diagram of a connector according to an embodiment of the present invention; FIG. 7 is a cross-sectional view of a connector according to an embodiment of the present invention taken along an axial direction; fig. 8 is a schematic structural diagram of a second base according to an embodiment of the present invention; FIG. 9 is a cross-sectional view taken at D-D of FIG. 8; FIG. 10 is a schematic view of a second embodiment of a base and a plurality of wrench sleeves according to the present invention; fig. 11 is a cross-sectional view at C-C of fig. 10.

The invention provides a socket wrench, which comprises a base 4, a wrench sleeve 2 and a connecting piece 3, wherein the wrench sleeve 2 is arranged on one side of the base 4.

One end of the wrench sleeve 2, which is far away from the base 4, is provided with a wrench hole which is recessed inwards and used for sleeving a first workpiece to be twisted, one of contact surfaces of the wrench sleeve 2 and the base 4 is provided with a groove 41 with a gradually reduced inner diameter, and the other contact surface is provided with a boss 221 which is matched with the groove 41 and used for being inserted into the groove 41. In other words, the wrench socket 2 has a wrench hole at one end and a boss 221 or a groove 41 at the other end.

The wrench sleeve 2 and the base 4 are mutually embedded through the concave-convex matched groove 41 and the boss 221, at least one cross section of the groove 41 is set to be non-circular, correspondingly, at least one cross section of the boss 221 is also set to be non-circular as the groove 41, and the purpose of the arrangement is that when the wrench sleeve 2 is rotated through the base 4, the non-circular side wall of the groove 41 is matched with the non-circular side wall of the boss 221, so that the wrench sleeve 2 can synchronously rotate along with the base 4.

Illustratively, the grooves 41 and the projections 221 are provided with a non-circular cross-section, for example, the grooves 41 are provided as prismatic tables, or a portion of the grooves 41 are provided as prismatic tables, and a cylinder or cube is connected to the larger bottom surface of the prismatic table. Of course, it is also possible to provide the groove 41 with an elliptical cross-sectional geometry or the like.

Since the inner diameter of the groove 41 is tapered, for example, when the groove 41 is provided in the base 4, the inner diameter of the groove 41 is gradually reduced from the surface of the base 4 toward the inside of the base 4, and accordingly, the boss 221 is provided in the wrench socket 2, and the radial dimension of the boss 221 is gradually enlarged from the surface of the wrench socket 2 toward the outside. The purpose of this setting is that the wrench sleeve 2 can be disengaged from the base 4 along the axial direction of the groove 41, that is, the axial direction of the boss 221, and especially when the wrench sleeve 2 moves in the direction of disengaging from the base 4 but does not disengage from the base 4, a gap exists between the boss 221 and the groove 41 in the radial direction, so that the wrench sleeve 2 can be slightly moved relative to the base 4, that is, the wrench sleeve 2 can be shifted and rotated relative to the base 4 in the gap between the boss 221 and the groove 41, which is beneficial to improving the force-releasing effect when the wrench hole is released from the first workpiece to be twisted, so that the first workpiece to be twisted and a product on which the first workpiece to be twisted is mounted can be quickly disengaged from the socket wrench, and the operation difficulty and the operation efficiency of the socket wrench are reduced.

In addition, the wrench socket 2 that has not been separated from the base 4 can accurately and quickly return to the original point, that is, return to the state of complete assembly of the recess 41 and the boss 221 under the action of self gravity under the matching and guiding action of the recess 41 and the boss 221, and the wrench socket 2 is prevented from being clamped at a position other than the original point to influence the next installation.

The connection member 3 is connected between the protrusion 221 and the groove 41, and either one of the protrusion 221 and the groove 41 disposed on the wrench sleeve 2 can slide along the length direction of the connection member 3, thereby achieving the effect that the protrusion 221 is partially separated from the groove 41. Of course, in order to prevent the boss 221 from completely separating from the groove 41, a limiting cap 31 is provided along one end of the boss 221 and the groove 41 which is inserted into the wrench hole; the wrench sleeve 2 is provided with a limit stop 221 for cooperating with the limit cap 31.

When the groove 41 and the boss 221 are completely engaged, a gap exists between the limiting cap 31 and the limiting platform 221, and at this time, the first workpiece to be twisted is sleeved by the wrench hole of the wrench sleeve 2, and then the base 4 applies torque to the wrench sleeve 2, so that the first workpiece to be twisted is rotated.

Once the first workpiece to be screwed down or removed, the base 4 is lifted up (when the base 4 is positioned above the wrench sleeve 2) or the base 4 is pulled down (when the base 4 is positioned below the wrench sleeve 2) to partially disengage the recess 41 from the boss 221 until the stop cap 31 contacts the stop table.

When the groove 41 and the boss 221 are in the partially disengaged and partially engaged state, a gap for relative movement exists between the groove 41 and the boss 221 in the radial direction, and the wrench sleeve 2 is shaken to accelerate the detachment of the wrench sleeve 2 from the first workpiece to be twisted, thereby preventing the first workpiece to be twisted from being clamped into the wrench sleeve 2 and being unable to disengage.

In conclusion, compared with the existing socket wrench, the wrench sleeve 2 and the base 4 provided by the invention avoid the socket wrench from rotating along with the first workpiece to be twisted in a matching way of the groove 41 and the boss 221, so that the normal work of the socket wrench is ensured; and the matching of the groove 41, the boss 221 and the connecting piece 3 enables the spanner sleeve 2 to realize micro-motion in the axial direction and the radial direction when separating the first workpiece to be twisted, effectively unloads the acting force between the first workpiece to be twisted and the spanner hole, and enables the socket spanner to easily fall off.

The engagement and connection between the recess 41 and the protrusion 221 are improvements of the present application, and therefore, the engagement and connection between the recess 41 and the protrusion 221 can be achieved regardless of whether the recess 41 is disposed on the base 4 or the wrench sleeve 2.

Illustratively, in the embodiment of the present application, the groove 41 is provided in the base 4, and the protrusion 221 is provided in the wrench sleeve 2. The inner diameter of the groove 41 is gradually reduced from the surface of the base 4 to the inside of the base 4, and the radial dimension of the boss 221 is gradually enlarged from the end face of the wrench socket 2 to the outside. When the base 4 and the wrench sleeve 2 are installed, the boss 221 is inserted into the groove 41, the groove 41 and the boss 221 are connected by the connecting piece 3 along the axial direction of the groove 41 and the boss 221, and the limiting cap 31 of the connecting piece 3 is arranged in the wrench hole.

The base 4 may be provided with a plurality of grooves 41 for connecting a plurality of wrench sleeves 2 or for providing a plurality of mounting stations for the wrench sleeves 2, in other words, when the number of the grooves 41 of the base 4 is greater than the number of the wrench sleeves 2 and the number of the wrench sleeves 2 is greater than one, not only can the mounting of all wrench sleeves 2 be realized, but also the plurality of wrench sleeves 2 can be selectively connected to different positions of the base 4, so as to adjust the distance and angle between different wrench sleeves 2, and realize the one-time screwing (including screwing and unscrewing) of a plurality of first workpieces to be screwed.

When a plurality of first workpieces to be twisted are sleeved by a plurality of wrench holes of the same tool, locking force is generated between any first workpiece to be twisted and the sleeved wrench hole, and the locking forces between a plurality of groups of first workpieces to be twisted and the wrench holes are mutually superposed, so that the difficulty in disassembling the wrench holes and the first workpieces to be twisted is greatly increased.

Obviously, a hole for the connection piece 3 to pass through is arranged in the boss 221, and the diameter of the hole is larger than the radial size of the connection piece 3; correspondingly, a mounting hole for fixedly connecting one end of the connecting piece 3 is formed in the base 4, and the mounting hole is fixed to the connecting piece 3, so that the boss 221 is limited between the mounting hole and the limiting cap 31. Because the length of the connecting piece 3 between the mounting hole and the limiting cap 31 is greater than the axial length of the boss 221, the boss 221 can slide along the connecting piece 3 between the mounting hole and the limiting cap 31, and the boss 221 is partially separated from the groove 41.

Wherein, the groove 41 can be configured as a concave frustum shape, such as a regular frustum pyramid; the bosses 221 are correspondingly configured as raised square frustums.

When a first workpiece to be twisted is screwed through the wrench sleeve 2, the boss 221 is completely inserted into the groove 41, the top surface of the boss 221 is attached to the bottom surface of the groove 41, the boss and the groove are in close contact, and the wrench sleeve 2 is driven by the base 2 to synchronously rotate; when the wrench sleeve 2 is disassembled from the first workpiece to be twisted, the top surface of the boss 221 is separated from the bottom surface of the groove 41, and a gap is generated between the side wall of the boss 221 and the side wall of the groove 41, so that the two can generate relative displacement.

In the above process, since the boss 221 is still in the groove 41, the side edge of the boss 221 cannot rotate to the other side edge from one side edge of the groove 41 in the groove 41, that is, the relative rotation angle between the boss 221 and the groove 41 is limited, and fine movement can occur, but the boss 221 cannot freely rotate in the groove 41, so that the force unloading effect between the wrench hole and the first workpiece to be screwed can be increased by the shake of the boss 221 relative to the groove 41, and the wrench hole cannot rotate along with the first workpiece to be screwed.

In various embodiments of the present application, the connecting member 3 is provided with a wrench hole at one end of the limiting cap 31 for cooperating with the limiting platform to limit the relative moving distance between the wrench sleeve 2 and the base 4 in the axial direction; the part of the connecting piece 3 passing through the boss 221 is connected with the boss 221 in a sliding way; the part of the connecting piece 3 extending into the base 4 is fixedly connected with the base 4.

The connecting piece 3 can be locked on the base 4 through a nut after penetrating through the base 4, at the moment, the base 4 is provided with a through hole, and the hole can be set as a round hole or a threaded hole; for a base 4 provided with a circular hole, the connecting member 3 may be locked to the base 4 by a nut.

In addition, the present application further provides a specific embodiment, which is used for realizing the fixed connection between the connecting member 3 and the base 4. In this embodiment, the connecting member 3 includes a stud 32 fixed to one side of the limiting cap 31, a through hole for the stud 32 to be inserted and slid is provided in the boss 221, a threaded blind hole 411 for the bottom end of the stud 32 to be inserted and screwed is provided in the groove 41, and the connecting member 3 is installed from the wrench sleeve 2 to the base 4.

Since the limiting cap 31 is located in the wrench hole, in order to avoid the limiting cap 31 from affecting the assembly of the wrench hole and the first workpiece to be twisted, the through hole in the boss 221 is provided as a counter bore 222, and the limiting table surface 2221 with the counter bore 222 sunk inwards forms a limiting table. Whether during screwing or detaching of the first workpiece to be screwed, the limiting cap 31 is completely positioned in the counter bore 222, and position interference to the wrench bore is avoided.

To simplify the design and manufacture of the wrench sleeve 2, the present application provides a wrench sleeve 2 comprising a sleeve 21 and a skeleton 22, based on any of the above embodiments. A wrench hole is arranged in the sleeve 21 to make the sleeve 21 in a cylindrical structure; the frame 22 is fixed in the wrench hole, for example, by welding.

The outward end surface of the framework 22 is flush with the end surface of the sleeve 21, and the boss 221 or the groove 41 is arranged on the outward end surface of the framework 22.

Taking the case that the frame 22 is provided with the boss 221 as an example, the counter-bore 222 is provided in the boss 221, that is, in the frame 22, the frame 22 and the sleeve 21 can be processed independently, and the material of the frame 22 and the material of the sleeve 21 can be different.

The framework 22 is fixedly connected with the wrench hole through the framework boss 223, for example, the framework boss 223 is welded in the wrench hole, or the framework 22 is fixed with the wrench hole through interference fit of the framework boss 223 with the wrench hole.

The framework 22 includes a framework 224 and three framework bosses 223 surrounding the framework 224. The middle of the framework body 224 is provided with a boss 221, and three framework bosses 223 are arranged around the framework body 224 and used for fixedly connecting the framework body 224 with the wrench holes.

Of course, the number of the frame bosses 223 is not limited to three, and two, six, etc. frame bosses may be provided. In order to ensure the force effect between the frame 22 and the wrench hole, all the frame bosses 223 are symmetrically distributed around the center of the frame body 224.

Set up skeleton boss 223 and realize the fixed connection of skeleton 22 with the spanner hole, the area of being connected of skeleton boss 223 and spanner hole is little moreover, and the connection effect is reliable to the fixed connection of skeleton 22 and spanner hole has been simplified to the weight that has alleviateed skeleton 22.

For better technical effect, the end of the framework 22 close to the wrench hole is provided with a sinking groove 225 for the second workpiece to be screwed to extend into. For example, the first workpiece to be screwed is a nut, the second workpiece to be screwed is a stud 32, and the wrench hole is matched with the nut to drive the nut to rotate around the stud 32. When the upper end surface of the nut is flush with the top end of the stud 32, that is, the upper end surface of the nut abuts against the end surface of the framework 22, and the nut cannot rotate around the stud 32 any longer, but the nut is not tightened yet. Therefore, a sinking groove 225 for avoiding the stud 32 is arranged in the framework 22, the stud 32 is inserted into the sinking groove 225, which is equivalent to extending a rotation distance of the depth of the sinking groove 225 for the nut, and the nut can rotate to the middle part of the stud 32, so that screwing or convenient disassembly is realized.

In addition, can also be in the sleeve 21 one end of keeping away from base 4 also the entry end in spanner hole sets up protection gasket 5, and protection gasket 5 laminates in the terminal surface setting of sleeve 21, and when the first work piece that waits to twist stretched into the spanner hole completely, if the terminal surface contact of sleeve 21 is equipped with the first product that waits to twist the work piece, protection gasket 5 completely isolates between sleeve 21 and product, avoids sleeve 21 to cause the fish tail on the surface of product at the rotation in-process.

The protective pad 5 can be adhered or fixed to the inlet end face of the sleeve 21 by fastening screws 1.

The surface of the stop cap 31 of the connecting member 3 may be further provided with a cutter 33 for inserting a fastening tool, for example, the cutter 33 is provided in a cross shape, and the connecting member 3 inserted into the base 4 is screwed by a cross-shaped screwdriver.

The socket wrench provided by the invention is usually connected with other operating equipment and is kept relatively fixed with the operating equipment, and after a workpiece to be screwed is inserted into the wrench sleeve 2, the socket wrench and the workpiece to be screwed can be rotated relatively by rotating the workpiece to be screwed.

Wherein, the base 4 can be further provided with a plurality of base mounting holes 42 for realizing the connection of the base 4. Besides the base seat 4 is fixedly connected with other operating equipment by the base seat mounting holes 42, the base seat 4 can also be fixedly connected with other operating equipment by the pressing strips, and as for the specific arrangement form and the mounting mode of the pressing strips, reference can be made to the related arrangement in the prior art, and the description is not further provided here.

The present invention is described by taking the operation mode that the base 4 is fixed and the workpiece to be screwed rotates as an example, and as for the operation mode that the base 4 rotates and the workpiece to be screwed is fixed, the above purpose can be achieved, and the wrench socket provided by the present invention can adopt the latter operation mode.

The socket wrench provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A socket wrench is characterized by comprising a base (4), a wrench sleeve (2) and a connecting piece (3), wherein the wrench sleeve is arranged on one side of the base (4); one end of the wrench sleeve (2) far away from the base (4) is provided with a wrench hole which is concave inwards and used for sleeving a first workpiece to be twisted; one of the contact surfaces of the wrench sleeve (2) and the base (4) is provided with a groove (41) with a gradually reduced inner diameter, and the other one is provided with a boss (221) which is matched with the groove (41) and is used for being inserted into the groove (41); at least one cross section of the groove (41) is provided in a non-circular shape; a limiting cap (31) is arranged at one end of the connecting piece (3) which is inserted into the wrench hole along the boss (221) and the groove (41); a limiting table matched with the limiting cap (31) is arranged in the spanner sleeve (2);

when the wrench sleeve (2) is detached from a first workpiece to be twisted, the boss (221) and the groove (41) are axially separated until the limiting table is in contact with the limiting cap (31);

the groove (41) is arranged on the base (4); the boss (221) is arranged on the wrench sleeve (2);

the connecting piece (3) comprises a limiting cap (31) and a stud (32) fixed on one side of the limiting cap (31); a threaded blind hole (411) for inserting the stud (32) is formed in the groove (41); the boss (221) is internally provided with a through hole for inserting the stud (32).

2. A socket wrench as claimed in claim 1, wherein the recess (41) is in the shape of a regular pyramid.

3. A socket wrench as claimed in claim 1, wherein the through-hole is provided as a counter-bore (222); the limiting table is formed by a limiting table top (2221) with the counter bores (222) sunk inwards.

4. A socket wrench according to claim 1, wherein said base (4) is provided with a plurality of said recesses (41), and a plurality of said wrench sleeves (2) are connected to said recesses (41) by a plurality of said connectors (3).

5. A socket wrench as claimed in any one of claims 1 to 4, wherein said wrench sleeve (2) comprises a sleeve (21) having a cylindrical shape and a skeleton (22) inserted and fixed in said sleeve (21); the wrench hole is arranged on the sleeve (21); the boss (221) is disposed on the frame (22).

6. A socket wrench as claimed in claim 5,

the framework (22) is provided with a framework boss (223) which is tightly attached to the side wall of the wrench hole to realize interference connection, or,

the framework boss (223) of the framework (22) is welded to the wrench hole.

7. A socket wrench as claimed in claim 6, wherein the skeleton (22) further comprises a skeleton body (224) to be coaxial with the socket (21); the three framework bosses (223) uniformly surround the periphery of the framework body (224).

8. A socket wrench as claimed in claim 5, wherein the end of the skeleton (22) near the wrench bore is provided with an inwardly recessed groove (225) for a second workpiece to be twisted to extend into, and/or the end of the sleeve (21) far from the base (4) is further connected with a protective pad (5) for avoiding planar contact with the workpiece.