CN109159059B

CN109159059B - Labor-saving socket wrench

Info

Publication number: CN109159059B
Application number: CN201811206363.5A
Authority: CN
Inventors: 尹苑苑; 周焱春; 李的根
Original assignee: Yuhuan Moheng Electromechanical Technology Co Ltd
Current assignee: Yuhuan Moheng Electromechanical Technology Co., Ltd
Priority date: 2018-10-17
Filing date: 2018-10-17
Publication date: 2020-11-06
Anticipated expiration: 2038-10-17
Also published as: CN109159059A

Abstract

The invention belongs to the technical field of hardware tools, and particularly relates to a labor-saving socket wrench which comprises a socket and a handle, and further comprises a bending unit, wherein the bending unit is used for realizing bending of the handle in any direction relative to the socket, so that a larger torque is generated by bending the handle and the socket to unscrew a nut or a bolt, the bending unit comprises a fixed block, a connecting block, a rotating ball, a bevel gear, a rotating ring, a limiting pin, a limiting plate and a spring, the lower end of the fixed block is provided with the socket, the upper surface of the fixed block is provided with a truncated cone-shaped groove with a large opening at the upper end and a small opening at the lower end, and the fixed block is; the limiting teeth are arranged at intervals of one high and one low, and each limiting tooth is arranged along the generatrix direction of the truncated cone-shaped groove; the connecting block is vertically arranged at the bottom of the round table-shaped groove of the fixing block, the spherical crown-shaped groove is arranged on the upper surface of the connecting block, and a magnet is arranged in the upper part of the connecting block. The invention can realize the unscrewing of large torque and the quick unscrewing of the bolt or the nut after the unscrewing.

Description

Labor-saving socket wrench

Technical Field

The invention belongs to the technical field of hardware tools, and particularly relates to a labor-saving socket wrench.

Background

A wrench is a common installation and removal tool. Bolts, screws, nuts and other hand tools that threadably secure open or trepan fasteners of bolts or nuts are turned using the principle of leverage. The wrench is provided with a sleeve for clamping the bolt or the nut at one end or two ends of the handle part, and when the wrench is used, external force is applied to the handle part along the rotation direction of the thread, so that the bolt or the nut can be screwed. The existing wrenches are divided into two types, wherein one type is that a handle is vertical to a sleeve, the other type is that the handle and the sleeve are positioned on the same straight line, and when the handle is vertical to the sleeve, a larger torque can be provided to facilitate the loosening of a bolt or a nut, but when the bolt or the nut is loosened, the bolt or the nut is not convenient to quickly unscrew after being loosened due to the longer moment arm of the handle; when handle and sleeve are in same straight line, because the arm of force is shorter, be difficult to provide big torsion, it is not laborsaving during leading to the use, nevertheless after bolt or nut are unscrewed, accomplish fast turn bolt or nut and realize unscrewing, because the rigidity of sleeve and handle to make current box spanner be difficult to accomplish to compromise simultaneously the problem of unscrewing of big moment of torsion and unscrewing fast unscrewing after.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention provides a labor-saving socket wrench. The invention is mainly used for solving the problem that the socket wrench is difficult to simultaneously loosen a large torque and quickly unscrew a bolt or a nut after the bolt or the nut is loosened due to the relative fixation of the handle of the socket wrench and the position of the socket.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a labor-saving socket wrench, which comprises a socket, a handle and a bending unit, wherein the bending unit is used for realizing bending of the handle in any direction relative to the socket, so that a larger torque is generated by bending the handle and the socket to loosen a nut or a bolt; the limiting teeth are arranged at intervals of one high and one low, and each limiting tooth is arranged along the direction of a generatrix of the truncated cone-shaped groove; the connecting block is vertically arranged at the bottom of the round table-shaped groove of the fixed block, the spherical crown-shaped groove is formed in the upper surface of the connecting block, and a magnet is arranged in the upper part of the connecting block; the rotating ball is fixed at the lower end of the handle, is in contact with the spherical crown-shaped groove of the connecting block and can rotate in the spherical crown-shaped groove, a cavity is arranged in the rotating ball, magnetic fluid is stored in the cavity, and the rotating ball can be always in contact with the connecting block due to the existence of the magnetic fluid; the bevel gear is fixedly arranged on the handle, when the handle is bent ninety degrees relative to the sleeve, the bevel gear is contacted with the limiting teeth in the truncated cone-shaped groove of the fixed block, and the limiting teeth arranged in a high-low mode are used for limiting the rotation of the bevel gear; the rotating ring is rotatably arranged on the outer surface of the fixed block, and the axis of the rotating ring is overlapped with that of the fixed block; the limiting pin is fixedly arranged on the outer circumferential surface of the rotating ring along the radial direction of the rotating ring; one end of the limiting plate is fixedly arranged on the handle, the other end of the limiting plate is provided with a clamping groove, and when the handle is bent to form ninety degrees with the sleeve, the rotating ring is rotated to enable the limiting pin to be positioned in the clamping groove of the limiting plate, so that the handle is limited; one end of the spring is fixed at the bottom of the truncated cone-shaped groove of the fixed block, the other end of the spring is fixed on the lower end face of the bevel gear, and the spring is used for transmitting the torsion of the handle to the sleeve when the handle is parallel to the sleeve. When nut or bolt are dismantled to needs, it makes sleeve and handle be ninety degrees to pull the handle, bevel gear and spacing tooth contact this moment, block the spacer pin through the draw-in groove on the limiting plate simultaneously, the upper and lower vibration of handle has been prevented, thereby make bevel gear can't pass through the spacing tooth that rotates high, the spacing of handle has been realized, the handle passes through bevel gear drive fixed block and rotates in step, thereby make the sleeve rotate in step, can produce great moment of torsion after utilizing handle and sleeve to buckle and make nut or bolt unscrewed, then rotate the limiting plate again, pull the handle, make handle and sleeve be in same straight line, be convenient for unscrew nut or bolt fast.

A through groove is formed in the surface of the rotating ball, which is in contact with the spherical crown-shaped groove, the through groove is communicated with a cavity in the rotating ball, and waterproof cloth is arranged in the through groove; the waterproof cloth is made of elastic materials and is used for preventing the magnetic fluid in the rotating ball from overflowing; the connecting block is provided with a rectangular groove at a position corresponding to the through groove. When the handle and the sleeve keep parallel, the magnetofluid pushes the waterproof cloth to move into the rectangular groove of the connecting block under the action of magnetic attraction of the magnet and self gravity, so that when the handle rotates, the waterproof cloth in the rectangular groove carries the magnetofluid to play a role in transmitting torque, and the working reliability of the sleeve wrench is improved.

The limiting plate is provided with a limiting groove at the bottom of the clamping groove, and a limiting block is arranged in the limiting groove; the limiting block is hinged in the limiting groove, the upper surface of the limiting block is in contact with the limiting pin, and the hinged position of the limiting block is located on one side, close to the opening of the clamping groove, of the contact position of the limiting pin and the limiting block. When the handle drives the limiting plate upward movement, the limiting pin extrudes the limiting block, the limiting block rotates around the hinged part, the limiting block is close to the tilting of one end with the opening of the clamping groove, the limiting pin is blocked, and the limiting pin is prevented from sliding out of the clamping groove.

The lower end face of the bevel gear is provided with a spline groove, and the upper end of the spring is fixedly connected with a spline block; the spline block is positioned in the spline groove. Through with spline piece card income spline inslot, realized the releasable connection of spring and bevel gear, install and remove the convenience.

The limiting teeth are in the same shape, and the limiting teeth are provided with heightening layers; the heightening layers are arranged on the limiting teeth at intervals, are arranged on the limiting teeth in a screw connection mode, and are made of plastic. Make spacing tooth be one high one low interval arrangement through adding high-rise design, cooperate the limiting plate again to carry on spacingly to bevel gear's rotation to guaranteed that the handle drives telescopic synchronous rotation, simplified the processing of spacing tooth, add high-rise connection of dismantling simultaneously, be convenient for add the change of high-rise after wearing and tearing, improved box spanner's life.

The spring is of a hollow structure. The hollow structure design of the spring improves the bending effect while ensuring torque transmission, facilitates smooth bending of the handle relative to the sleeve, and improves the practicability.

The invention has the following beneficial effects:

1. according to the labor-saving socket wrench, the bending unit is arranged between the handle and the socket, and the bending unit is used for adjusting the angle between the handle and the socket, so that the bending unit enables the handle to be perpendicular to the socket at the initial stage of disassembling a bolt or a nut, the bolt or the nut is unscrewed by using large torque, and then the handle and the socket are in the same straight line through the bending unit, the handle is conveniently and rapidly rotated to unscrew the unscrewed bolt or nut, the disassembling efficiency of the bolt or the nut is improved, and the use is convenient.

2. According to the labor-saving socket wrench, the bevel gear is arranged on the handle, the socket is arranged on the fixing block, the bevel gear is limited by the contact of the limiting teeth on the fixing block and the bevel gear, and the limiting pin on the fixing block is clamped by the limiting plate arranged on the handle, so that the bevel gear is positioned, the synchronous rotation of the handle and the socket is ensured, the operation is simple, and the work is reliable.

3. According to the labor-saving socket wrench, the through groove is formed in the rotating ball at the end of the handle, the magnetic fluid in the rotating ball pushes the waterproof cloth to move into the rectangular groove of the connecting block under the magnetic attraction of the magnet and the action of self gravity, so that when the handle rotates, the waterproof cloth in the rectangular groove can play a role in transmitting torque by carrying the magnetic fluid, and the torque is transmitted by matching with the spring, so that the working reliability of the socket wrench is improved.

Drawings

FIG. 1 is a schematic view of the sleeve of the present invention in a coaxial position with the handle;

FIG. 2 is a schematic view of the sleeve and handle of the present invention in a mutually perpendicular orientation;

FIG. 3 is a schematic view of the bevel gear of the present invention in contact with a limit tooth;

FIG. 4 is a side view of the spacing pin of the present invention positioned within the slot of the spacing plate;

FIG. 5 is a schematic view of a spline block of the present invention;

in the figure: the device comprises a sleeve 1, a handle 2, a bending unit 3, a fixing block 31, a connecting block 32, a rotating ball 33, a bevel gear 34, a rotating ring 35, a limiting pin 36, a limiting plate 37, a spring 38, a limiting tooth 4, a spherical crown-shaped groove 321, a magnet 5, a magnetic fluid 6, a clamping groove 371, a through groove 331, waterproof cloth 7, a rectangular groove 322, a limiting groove 372, a limiting block 8, a spline block 9 and a heightening layer 10.

Detailed Description

A power saving socket wrench according to an embodiment of the present invention will be described below with reference to fig. 1 to 5.

As shown in fig. 1 to 4, the labor-saving socket wrench disclosed by the invention comprises a socket 1, a handle 2 and a bending unit 3, wherein the bending unit 3 is used for bending the handle 2 in any direction relative to the socket 1, so that a nut or a bolt is unscrewed by using a large torque generated by bending the handle 2 and the socket 1, the bending unit 3 comprises a fixing block 31, a connecting block 32, a rotating ball 33, a bevel gear 34, a rotating ring 35, a limiting pin 36, a limiting plate 37 and a spring 38, the socket 1 is installed at the lower end of the fixing block 31, a truncated cone-shaped groove with a large upper end opening and a small lower end opening is arranged on the upper surface of the fixing block 31, and a limiting tooth 4 is arranged on the side wall of the truncated cone-shaped groove of the fixing block 31; the limiting teeth 4 are arranged at intervals of one high and one low, and each limiting tooth 4 is arranged along the generatrix direction of the truncated cone-shaped groove; the connecting block 32 is vertically arranged at the bottom of the circular truncated cone-shaped groove of the fixing block 31, the spherical crown-shaped groove 321 is formed in the upper surface of the connecting block 32, and the magnet 5 is arranged in the upper part of the connecting block 32; the rotating ball 33 is fixed at the lower end of the handle 2, the rotating ball 33 is in contact with the spherical cap-shaped groove 321 of the connecting block 32 and can rotate in the spherical cap-shaped groove 321, a cavity is arranged in the rotating ball 33, magnetic fluid 6 is stored in the cavity, and the rotating ball 33 can be always in contact with the connecting block 32 due to the existence of the magnetic fluid 6; the bevel gear 34 is fixedly arranged on the handle 2, when the handle 2 is bent ninety degrees relative to the sleeve 1, the bevel gear 34 is contacted with the limiting teeth 4 in the circular truncated cone-shaped groove of the fixed block 31, and the limiting teeth 4 arranged in a high-low mode are used for limiting the rotation of the bevel gear 34; the rotating ring 35 is rotatably arranged on the outer surface of the fixed block 31, and the axis of the rotating ring 35 is overlapped with that of the fixed block 31; the limit pin 36 is fixedly installed on the outer circumferential surface of the swivel 35 along the radial direction of the swivel 35; one end of the limiting plate 37 is fixedly arranged on the handle 2, the other end of the limiting plate 37 is provided with a clamping groove 371, and when the handle 2 is bent to form a ninety-degree angle with the sleeve 1, the rotating ring 35 is rotated to enable the limiting pin 36 to be positioned in the clamping groove 371 of the limiting plate 37, so that the limiting of the handle 2 is realized; one end of the spring 38 is fixed at the bottom of the truncated cone-shaped groove of the fixed block 31, the other end of the spring 38 is fixed on the lower end surface of the bevel gear 34, and the spring 38 is used for transmitting the torsion of the handle 2 to the sleeve 1 when the handle 2 is parallel to the sleeve 1. When nut or bolt need be dismantled, it makes sleeve 1 be ninety degrees with handle 2 to pull handle 2, bevel gear 34 and the contact of spacing tooth 4 this moment, simultaneously block spacer pin 36 through draw-in groove 371 on the limiting plate 37, the upper and lower vibration of handle 2 has been prevented, thereby make bevel gear 34 can't pass through the rotation and cross high-order spacing tooth 4, realized spacing to handle 2, handle 2 drives fixed block 31 synchronous rotation through bevel gear 34, thereby make sleeve 1 synchronous rotation, can produce great moment of torsion after utilizing handle 2 and sleeve 1 to buckle and make nut or bolt unscrewed, then rotate limiting plate 37 again, pull handle 2, make handle 2 and sleeve 1 be in same straight line, be convenient for unscrew nut or bolt fast.

As shown in fig. 1 and 2, a through groove 331 is formed on the surface of the rotating ball 33, which is in contact with the spherical crown-shaped groove 321, the through groove 331 is communicated with the cavity inside the rotating ball 33, and a waterproof cloth 7 is arranged in the through groove 331; the waterproof cloth 7 is made of elastic materials, and the waterproof cloth 7 is used for preventing the magnetic fluid 6 in the rotating ball 33 from overflowing; the connecting block 32 is provided with a rectangular groove 322 at a position corresponding to the through groove 331. When the handle 2 is parallel to the sleeve 1, the magnetic fluid 6 pushes the waterproof cloth 7 to move into the rectangular groove 322 of the connecting block 32 under the action of magnetic attraction of the magnet 5 and self gravity, so that when the handle 2 rotates, the waterproof cloth 7 in the rectangular groove carries the magnetic fluid 6 to play a role in transmitting torque, and the working reliability of the sleeve wrench is improved.

As shown in fig. 4, the limiting plate 37 is provided with a limiting groove 372 at the bottom of the clamping groove 371, and a limiting block 8 is arranged in the limiting groove 372; stopper 8 articulates in spacing groove 372, and stopper 8 upper surface and spacer pin 36 contact, stopper 8 hinge position is located spacer pin 36 and stopper 8 contact position and is close to draw-in groove 371 open-ended one side. When handle 2 drove limiting plate 37 upward movement, stop pin 36 produced the extrusion to stopper 8, made stopper 8 rotate around articulated position, and stopper 8 is close to draw-in groove 371 open-ended one end perk, stops stop pin 36, has avoided stop pin 36 roll-off draw-in groove 371.

As shown in fig. 5, the lower end surface of the bevel gear 34 is provided with a spline groove, and the upper end of the spring 38 is fixedly connected with the spline block 9; the spline block 9 is located in the spline groove. The spline block 9 is clamped in the spline groove, so that the spring 38 and the bevel gear 34 are detachably connected, and the assembly and disassembly are convenient.

As shown in fig. 3, the limiting teeth 4 have the same shape, and a heightening layer 10 is arranged on the limiting teeth 4; the heightening layers 10 are arranged on the limiting teeth 4 at intervals, the heightening layers 10 are installed on the limiting teeth 4 in a screw connection mode, and the heightening layers 10 are made of plastic materials. Spacing tooth 4 is the interval arrangement of one high one low through the design that adds high-rise 10, and it is spacing to bevel gear 34's rotation to cooperate limiting plate 37 again to guaranteed that handle 2 drives the synchronous rotation of sleeve 1, simplified the processing of spacing tooth 4, add high-rise 10 simultaneously and can dismantle the connection, be convenient for add the change of high-rise 10 after the wearing and tearing, improved box spanner's life.

The spring 38 is a hollow structure. The hollow structure design of the spring 38 improves the bending effect while ensuring torque transmission, facilitates smooth bending of the handle 2 relative to the sleeve 1, and improves the practicability.

The specific process is as follows:

when nut or bolt need be dismantled, it makes sleeve 1 be ninety degrees with handle 2 to pull handle 2, bevel gear 34 and the contact of spacing tooth 4 this moment, simultaneously block spacer pin 36 through draw-in groove 371 on the limiting plate 37, the upper and lower vibration of handle 2 has been prevented, thereby make bevel gear 34 can't pass through the rotation and cross high-order spacing tooth 4, realized spacing to handle 2, handle 2 drives fixed block 31 synchronous rotation through bevel gear 34, thereby make sleeve 1 synchronous rotation, can produce great moment of torsion after utilizing handle 2 and sleeve 1 to buckle and make nut or bolt unscrewed, then rotate limiting plate 37 again, pull handle 2, make handle 2 and sleeve 1 be in same straight line, be convenient for unscrew nut or bolt fast. When the handle 2 is parallel to the sleeve 1, the magnetic fluid 6 pushes the waterproof cloth 7 to move into the rectangular groove 322 of the connecting block 32 under the action of magnetic attraction of the magnet 5 and self gravity, so that when the handle 2 rotates, the waterproof cloth 7 in the rectangular groove carries the magnetic fluid 6 to play a role in transmitting torque, and the working reliability of the sleeve wrench is improved.

When handle 2 drove limiting plate 37 upward movement, stop pin 36 produced the extrusion to stopper 8, made stopper 8 rotate around articulated position, and stopper 8 is close to draw-in groove 371 open-ended one end perk, stops stop pin 36, has avoided stop pin 36 roll-off draw-in groove 371.

Spacing tooth 4 is the interval arrangement of one high one low through the design that adds high-rise 10, and it is spacing to bevel gear 34's rotation to cooperate limiting plate 37 again to guaranteed that handle 2 drives the synchronous rotation of sleeve 1, simplified the processing of spacing tooth 4, add high-rise 10 simultaneously and can dismantle the connection, be convenient for add the change of high-rise 10 after the wearing and tearing, improved box spanner's life.

While one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the present invention.

Industrial applicability

According to the invention, the bending unit is arranged between the handle and the sleeve, and the angle between the handle and the sleeve is adjusted by using the bending unit, so that the handle is perpendicular to the sleeve by using the bending unit at the initial stage of disassembling the bolt or the nut, the bolt or the nut is unscrewed by using high torque, and then the handle and the sleeve are in the same straight line by using the bending unit, the handle is conveniently and rapidly rotated to unscrew the unscrewed bolt or nut, the disassembling efficiency of the bolt or the nut is improved, and the labor-saving socket wrench is convenient to use, and is useful in the field of hardware tools.

Claims

1. A laborsaving box spanner, includes sleeve (1) and handle (2), its characterized in that: the bending device is characterized by further comprising a bending unit (3), wherein the bending unit (3) is used for bending the handle (2) in any direction relative to the sleeve (1), so that a large torque is generated by bending the handle (2) and the sleeve (1) to loosen the nut or the bolt, the bending unit (3) comprises a fixing block (31), a connecting block (32), a rotating ball (33), a bevel gear (34), a rotating ring (35), a limiting pin (36), a limiting plate (37) and a spring (38), the sleeve (1) is installed at the lower end of the fixing block (31), a circular table-shaped groove with a large opening at the upper end and a small opening at the lower end is formed in the upper surface of the fixing block (31), and limiting teeth (4) are arranged on the side wall of the circular table-shaped groove of; the limiting teeth (4) are arranged at intervals of one high and one low, and each limiting tooth (4) is arranged along the generatrix direction of the circular truncated cone-shaped groove; the connecting block (32) is vertically arranged at the bottom of the circular truncated cone-shaped groove of the fixing block (31), the spherical crown-shaped groove (321) is formed in the upper surface of the connecting block (32), and a magnet (5) is arranged in the upper portion of the connecting block (32); the rotating ball (33) is fixed at the lower end of the handle (2), the rotating ball (33) is in contact with the spherical crown-shaped groove (321) of the connecting block (32) and can rotate in the spherical crown-shaped groove (321), a cavity is arranged in the rotating ball (33), and magnetic fluid (6) is stored in the cavity; the bevel gear (34) is fixedly arranged on the handle (2), when the handle (2) is bent by ninety degrees relative to the sleeve (1), the bevel gear (34) is in contact with the limiting teeth (4) in the circular truncated cone-shaped groove of the fixing block (31), and the limiting teeth (4) which are distributed in a high-low mode are used for limiting the rotation of the bevel gear (34); the rotating ring (35) is rotatably arranged on the outer surface of the fixed block (31), and the axis of the rotating ring (35) is overlapped with that of the fixed block (31); the limiting pin (36) is fixedly arranged on the outer circumferential surface of the rotating ring (35) along the radial direction of the rotating ring (35); one end of the limiting plate (37) is fixedly arranged on the handle (2), the other end of the limiting plate (37) is provided with a clamping groove (371), and when the handle (2) is bent to form ninety degrees with the sleeve (1), the rotating ring (35) is rotated to enable the limiting pin (36) to be positioned in the clamping groove (371) of the limiting plate (37) so as to limit the handle (2); one end of the spring (38) is fixed at the bottom of the truncated cone-shaped groove of the fixed block (31), the other end of the spring (38) is fixed on the lower end face of the bevel gear (34), and the spring (38) is used for transmitting the torsion of the handle (2) to the sleeve (1) when the handle (2) is parallel to the sleeve (1); when the nut or the bolt needs to be disassembled, the handle (2) is pulled to enable the sleeve (1) and the handle (2) to form ninety degrees, at the moment, the bevel gear (34) is contacted with the limiting teeth (4), meanwhile, the limit pin (36) is clamped by the clamping groove (371) on the limit plate (37) to prevent the handle (2) from vibrating up and down, thereby leading the bevel gear (34) not to pass through the high-position limit teeth (4) by rotation, realizing the limit of the handle (2), leading the handle (2) to drive the fixed block (31) to synchronously rotate by the bevel gear (34), thereby the sleeve (1) rotates synchronously, the handle (2) and the sleeve (1) can generate larger torque after being bent to unscrew the nut or the bolt, then, the limiting plate (37) is rotated, and the handle (2) is pulled, so that the handle (2) and the sleeve (1) are in the same straight line, and the nut or the bolt can be conveniently and rapidly screwed out;

a through groove (331) is formed in the surface, which is in contact with the spherical crown-shaped groove (321), of the rotating ball (33), the through groove (331) is communicated with a cavity in the rotating ball (33), and waterproof cloth (7) is arranged in the through groove (331); the waterproof cloth (7) is made of elastic materials, and the waterproof cloth (7) is used for preventing the magnetic fluid (6) in the rotating ball (33) from overflowing; the connecting block (32) is provided with a rectangular groove (322) at a position corresponding to the through groove (331); when the handle (2) is parallel to the sleeve (1), the magnetic fluid (6) pushes the waterproof cloth (7) to move into the rectangular groove (322) of the connecting block (32) under the magnetic attraction of the magnet (5) and the self gravity effect, so that when the handle (2) rotates, the waterproof cloth (7) in the rectangular groove can carry the magnetic fluid (6) to play a role in transmitting torque, and the working reliability of the sleeve wrench is improved;

the limiting plate (37) is provided with a limiting groove (372) at the bottom of the clamping groove (371), and a limiting block (8) is arranged in the limiting groove (372); the limiting block (8) is hinged in the limiting groove (372), the upper surface of the limiting block (8) is in contact with the limiting pin (36), and the hinged part of the limiting block (8) is positioned on one side, close to the opening of the clamping groove (371), of the contact part of the limiting pin (36) and the limiting block (8);

the lower end face of the bevel gear (34) is provided with a spline groove, and the upper end of the spring (38) is fixedly connected with a spline block (9); the spline block (9) is positioned in the spline groove.

2. A power saving socket wrench as claimed in claim 1, wherein: the limiting teeth (4) are in the same shape, and the limiting teeth (4) are provided with heightening layers (10); the heightening layers (10) are arranged on the limiting teeth (4) at intervals, the heightening layers (10) are installed on the limiting teeth (4) in a screw connection mode, and the heightening layers (10) are made of plastic materials.

3. A power saving socket wrench as claimed in claim 1, wherein: the spring (38) is of a hollow structure.