CN214560564U

CN214560564U - Spiral nut dismounting device

Info

Publication number: CN214560564U
Application number: CN202120693554.XU
Authority: CN
Inventors: 刘海龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2021-11-02
Anticipated expiration: 2031-04-06

Abstract

The utility model discloses a spiral nut dismounting device relates to the repair tools field, can the different specification nuts of centre gripping to dismantle. The clamping mechanism comprises a shell with a cavity, and a propelling part and a clamping part which are arranged in the cavity, wherein a clamping hole is formed in one side of the shell, which is far away from the connecting rod, and a plurality of clamping parts are arranged on the periphery of the clamping hole; the connecting rod with casing threaded connection and one end pass the casing with propulsion portion connect with propulsion portion connects, propulsion portion is equipped with propulsion piece, propulsion piece can comply with the deep promotion of propulsion end the exposed core of clamping part is towards the centre gripping hole direction is drawn close. The utility model discloses, both possessed the function that matches different nut specifications, ensured simultaneously can not throw off when carrying out the centre gripping to the nut, had sufficient clamping-force all the time.

Description

Spiral nut dismounting device

Technical Field

The utility model relates to a repair tools field, concretely relates to spiral dismantlement nut device.

Background

Along with scientific progress and development, mechanical products are widely applied to daily life, but the machines have faults due to the reasons of age, improper operation and the like, and meanwhile, in the long-term use process of the nut, the connecting position of the nut and the bolt is rusted sometimes, so that the nut can be disassembled with enough force; when tools such as wrenches with fixed specifications are adopted, tools with a large number of different specifications are often required to be carried due to different sizes of various nut models, maintenance personnel need to hold a tool box of a large bag and carry a large number of disassembling tools matched with nuts with different specifications, and the tools are inconvenient to replace one by one.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: a nut device is designed, which can clamp nuts with different specifications so as to be convenient for disassembly. The utility model provides a solve a spiral nut dismounting device of above-mentioned problem.

The utility model discloses a following technical scheme realizes:

a screw type nut dismounting device comprises a connecting rod and a clamping mechanism, wherein one end of the connecting rod is a pushing end, and the other end of the connecting rod is a driving end; the clamping mechanism comprises a shell with a cavity, and a pushing part and a clamping part which are arranged in the cavity, wherein clamping holes and threaded holes are formed in two sides of the shell respectively, a plurality of clamping parts are placed on the periphery of each clamping hole, and clamping ends of the clamping parts face the clamping holes; the threaded hole penetrates through the connecting rod and is in threaded connection with the circumferential surface of the connecting rod, and the threaded hole is used for driving the pushing end to enter one end of the shell to go deep into the shell when the connecting rod rotates anticlockwise in the direction from the driving end to the pushing end; the propelling part is provided with a propelling piece, and the propelling piece can be in compliance with the deep pushing of the propelling part, and the clamping end of the clamping part is close to the clamping hole.

In the scheme: the driving end is used for being connected with a handle or a driving mechanism, the threaded hole is in threaded connection with the circumferential surface of the connecting rod, the rotating direction of the threads is set, the connecting rod is driven to rotate anticlockwise in the direction from the driving end to the pushing end by being held by hand or driven by the driving mechanism connected with the driving end, the connecting rod moves towards the direction of the shell due to the influence of the threads, the pushing end is further driven to penetrate into the shell, the pushing end drives the pushing part and a pushing piece on the pushing part to move downwards, and at the moment, the pushing piece pushes the clamping end to be close towards the direction of the clamping hole.

In the process of disassembling the nut, the nut is placed in the clamping hole, the shell around the clamping hole is tightly attached to the peripheral surface of the nut, the connecting rod rotates anticlockwise, the shell is tightly attached to the peripheral surface of the nut at the moment, friction force exists, the shell is fixed relative to the nut, only the connecting rod rotates, the pushing end on the connecting rod penetrates into the shell under the influence of threads, the pushing end pushes the pushing part and the pushing piece to move towards the direction of the clamping hole, the clamping part is pushed to move towards the clamping hole through the pushing piece, and at the moment, the distance between the clamping parts is reduced until the clamping parts abut against the peripheral surface of the nut in the clamping hole. And continuing rotating the connecting rod anticlockwise, wherein the clamping part is abutted against the peripheral surface of the nut at the moment and cannot continue moving inwards, the clamping force on the nut can be increased by the clamping part until the nut is screwed, the friction force formed by the shell tightly attached to the peripheral surface of the nut is insufficient to limit the integral rotation of the clamping mechanism, and then the clamping mechanism and the nut clamped in the clamping mechanism rotate coaxially anticlockwise with the connecting rod at the moment. When the nut is disassembled, the nut is usually taken out in the anticlockwise direction, and the disassembling operation of the nut can be completed in such a way.

In the long-term use process of the nut, the connecting position of the nut and the bolt is rusted sometimes, so that the nut can be disassembled only by large enough force, but the existing adjustable tools such as an adjustable wrench and the like can cause unstable clamping when the nut which needs large force is disassembled, and further the disassembling work can not be completed; when some tools such as wrenches with fixed specifications are adopted, a large number of tools with different specifications are often required to be carried. The structure has the function of matching different nut specifications, and simultaneously ensures that the nut cannot be separated when being clamped, and has enough clamping force all the time.

Preferably, the propelling part include with casing sliding connection's connecting piece, its slip direction with propelling end moving direction is parallel, connecting piece one side with propelling end rotatable coupling, the opposite side is equipped with the extrusion stem as the propelling part, the extrusion stem has the extrusion end, the extrusion end can promote the exposed core of clamping part is towards the centre gripping hole direction removes.

At the moment, the connecting piece is connected with the shell in a sliding mode, and the connecting piece is rotatably connected with the pushing end, so that the connecting piece can only move in the shell along the moving direction of the pushing end and cannot rotate, the stability of the clamping mechanism during moving is ensured, and after the nut is disassembled, the connecting rod can reversely rotate to drive the connecting piece and the extrusion rod on the connecting piece to reset so as to facilitate next nut disassembling operation. Meanwhile, each clamping part is provided with an extrusion rod for driving the clamping part to move, so that the light weight of the clamping mechanism can be ensured, the material is saved, and the clamping function is not influenced.

Preferably, one end of the extrusion rod, which is far away from the extrusion end, is a hinged end, the hinged end is hinged to the connecting piece and used for enabling the extrusion end on the extrusion rod to be capable of being drawn close to the center of the clamping hole by taking the hinged position as an axis, the extrusion end is placed on the inner wall of one side of the shell, which is provided with the clamping hole, and a connecting line between the hinged end and the extrusion end and a shadow projected by the connecting line on the inner wall of one side of the shell, which is provided with the clamping hole, are arranged in an acute angle.

The extrusion end is placed on the inner wall of one side that the casing was opened and is had the centre gripping hole just the hinged end with the line of extrusion end with the line projection is acute angle setting on the inner wall of one side that the casing was opened and is had the centre gripping hole, indicates the extrusion pole slope place in open in the casing on one side inner wall that has the centre gripping hole, work as when the connecting piece promotes the extrusion pole to the centre gripping hole, the extrusion end of extrusion pole receives the pushing action to be in move on the inner wall of centre gripping hole, because the hinge joint of hinged end, cause the extrusion pole can only move towards centre gripping hole center will the clamping part draws close to centre gripping hole center through this kind of mode. Besides, when the connecting piece is far away from the clamping hole, the extrusion end of the extrusion rod moves on the inner wall of the clamping hole under the tension force and is far away from the center of the clamping hole.

Preferably, the extrusion end structure is cylindrical, and the cylindrical circumferential surface is arranged on the inner wall of the side, provided with the clamping hole, of the shell and is attached to the clamping part.

Because the extrusion end structure is cylindrical, and simultaneously the cylindrical circumferential surface is placed on the inner wall of one side of the shell with the clamping hole and attached to the clamping part, the contact area between the extrusion end and the inner wall of the shell can be reduced, so that the friction force when the extrusion end moves is reduced, and the clamping of the nut is smoother.

Preferably, the clamping part is including fixing spacing seat on the shell body opens one side inner wall that has the centre gripping hole and with spacing seat sliding connection's holder, the holder is close to the one end at centre gripping hole center is the exposed core, and its slip direction is the exposed core with the line direction at centre gripping hole center.

Through setting up spacing seat and the holder that matches each other, ensure that the holder only can move towards the exposed core in the spacing seat with the line direction at centre gripping hole center, improve the stability to the nut centre gripping, avoid owing to rocking of holder causes the centre gripping unstability.

Further preferably, an elastic element for resetting the clamping piece is arranged between the clamping piece and the limiting seat.

When the nut is disassembled, the clamping piece is pushed towards the clamping hole by the pushing part, the elastic element is stretched, and the clamping piece has a resetting trend under the action of the elastic element; and after the disassembly work of the nut is completed, the pushing part resets and does not push the clamping piece any more, and the elastic element pulls the clamping piece to reset so as to facilitate the disassembly work of the next nut.

Further preferably, the spacing seat is opened there is the spout, the groove of spout to do the exposed core with the line direction at centre gripping hole center, the spout is including overlapping last channel and lower channel, wear to be equipped with in the channel down the holder keeps away from the one end of exposed core and passes the extrusion end of going up the channel, the extrusion end with the holder is kept away from the one end laminating of exposed core, wherein the terminal surface diameter of extrusion end is less than the height of channel down, the width of extrusion end periphery is less than the width of channel down and is greater than the width of going up the channel.

The cylindrical extrusion end and one end of the clamping piece, which is far away from the clamping end, are placed into the lower channel, and the extrusion end is cylindrical, the diameter of the end surface of the extrusion end is smaller than the height of the lower channel, and the width of the circumferential surface of the extrusion end is smaller than the width of the lower channel and larger than the width of the upper channel, so that the extrusion end can slide and rotate in the lower channel. When the connecting block moves towards the clamping hole, the extrusion end is extruded to slide towards the center of the clamping hole in the lower channel and rotate at the same time, the clamping piece is pushed to move towards the clamping hole, and at the moment, the rod body close to the extrusion end on the extrusion rod also moves in the upper channel. In this way, the working process of the extrusion end and the clamping piece can be ensured to be stable enough, and the problems of dislocation, deflection and the like can be avoided.

Preferably, a protruding block is arranged on one side of the clamping piece and located in the upper channel, and a blocking strip used for limiting the protruding block to move towards the clamping hole extends from the inner wall of the upper channel.

Through the lug with the cooperation of shelves strip, avoid the holder receive the effect of extrusion end is too to the centre gripping hole direction removal, leads to the holder deviates from lower channel, causes the device to damage.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is an overall schematic diagram of an embodiment of the present invention;

FIG. 2 is a block diagram of an embodiment of the present invention;

FIG. 3 is a view showing a structure of the pressing portion of the embodiment of the present invention;

fig. 4 is a structural view of the pressing portion according to the embodiment of the present invention.

Reference numbers and corresponding part names in the drawings:

1-connecting rod, 11-propelling end, 2-shell, 21-clamping hole, 22-threaded hole, 31-connecting piece, 32-extruding rod, 321-extruding end, 41-limiting seat, 411-upper channel, 412-lower channel, 4111-stopping strip, 42-clamping piece, 421-lug and 43-elastic element.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

Example (b):

a screw type nut dismounting device comprises a connecting rod 1 and a clamping mechanism, wherein one end of the connecting rod 1 is a propelling end 11, and the other end of the connecting rod is a driving end; the clamping mechanism comprises a shell 2 with a cavity, and a propelling part and a clamping part which are arranged in the cavity, wherein clamping holes 21 and threaded holes 22 are respectively formed in two sides of the shell 2, a plurality of clamping parts are placed on the periphery of each clamping hole 21, and clamping ends of the clamping parts face the clamping holes 21; the threaded hole 22 penetrates through the connecting rod 1 and is in threaded connection with the circumferential surface of the connecting rod 1, so that the connecting rod 1 rotates anticlockwise from the driving end to the pushing end 11 to drive the pushing end 11 to enter one end of the shell 2 to penetrate into the shell 2; the propelling part is provided with a propelling piece, and the propelling piece can follow the deep pushing of the propelling part 11 and draw close the clamping end of the clamping part towards the direction of the clamping hole 21.

Because screw hole 22 with connecting rod 1 periphery threaded connection sets up the screw thread to revolve, drives through handheld or through the actuating mechanism who is connected with the drive end connecting rod 1 carries out anticlockwise rotation with the drive end to the direction of propelling part 11, because the influence of screw thread, connecting rod 1 moves towards casing 2 direction, and then drives propelling part 11 and go deep into casing 2, propelling part 11 drives propelling part and last propelling part downstream, at this moment the propelling part promotes the exposed core is towards the centre gripping hole 21 direction is drawn close.

In the process of nut dismounting, the nut is placed in the clamping hole 21, the shell 2 around the clamping hole 21 is tightly attached to the peripheral surface of the nut, the connecting rod 1 is rotated anticlockwise, the shell 2 is tightly attached to the peripheral surface of the nut at the moment, friction force exists, the shell 2 is fixed relative to the nut, only the connecting rod 1 rotates, the pushing end 11 on the connecting rod 1 is enabled to penetrate into the shell 2 under the influence of threads at the moment, the pushing end 11 pushes the pushing part and the pushing piece to move towards the clamping hole 21, the clamping part is pushed to move towards the clamping hole 21 through the pushing piece, and at the moment, the distance between the clamping parts is reduced until the clamping parts abut against the peripheral surface of the nut in the clamping hole 21. And continuing rotating the connecting rod 1 anticlockwise, wherein the clamping part is abutted against the peripheral surface of the nut at the moment and cannot move inwards continuously, the clamping force on the nut can be increased by the clamping part until the nut is screwed, the friction force formed by tightly attaching the shell 2 to the peripheral surface of the nut is insufficient to limit the integral rotation of the clamping mechanism, and the clamping mechanism and the nut clamped therein rotate coaxially and anticlockwise with the connecting rod 1 at the moment. When the nut is disassembled, the nut is usually taken out in the anticlockwise direction, and the disassembling operation of the nut can be completed in such a way.

The propelling part can be structured as follows: include with connecting piece 31 that connecting rod 1 propulsion end 11 is connected, at this moment connecting piece 31 receives propulsion end 11 promotes to remove to centre gripping hole 21, the propulsion is for setting up the block of connecting rod 1 one side is kept away from to the propulsion, the block sets up towards the lopsidedness of clamping part, and its inclined plane is followed the propulsion begins the width and reduces gradually, the inclined plane laminating one side of centre gripping hole 21 is kept away from to the clamping part, works as when the propulsion moves down, the inclined plane with the laminating point of clamping part removes to the inclined plane of broad, this moment the clamping part receives the extrusion and removes to centre gripping hole 21.

Besides, for one or more embodiments, the pushing part includes a connecting member 31 slidably connected to the housing 2, the sliding direction of the connecting member is parallel to the moving direction of the pushing end 11, one side of the connecting member 31 is rotatably connected to the pushing end 11, the other side is provided with a pressing rod 32 as a pushing member, the pressing rod 32 is provided with a pressing end 321, and the pressing end 321 can push the clamping end of the clamping part to move towards the clamping hole 21.

At this time, the connecting piece 31 is slidably connected with the housing 2, and the connecting piece 31 is rotatably connected with the pushing end 11, so that the connecting piece 31 can only move in the housing 2 along the moving direction of the pushing end 11 and cannot rotate, the stability of the clamping mechanism during moving is ensured, and after the nut is disassembled, the connecting piece 31 and the extrusion rod 32 thereon can be driven to reset by reversely rotating the connecting rod 1, so that the next nut disassembling operation can be facilitated.

Meanwhile, for one or more embodiments, one end of the extrusion rod 32, which is far away from the extrusion end 321, is a hinged end, which is hinged to the connecting piece 31, and is used for enabling the extrusion end 321 on the extrusion rod 32 to be close to the center of the clamping hole 21 by taking a hinged position as an axis, the extrusion end 321 is placed on the inner wall of one side of the shell 2, where the clamping hole 21 is formed, and the connection line of the hinged end and the extrusion end 321 and the shadow of the projection of the connection line on the inner wall of one side of the shell 2, where the clamping hole 21 is formed, are arranged in an acute angle.

The extrusion end 321 is placed on the inner wall of one side of the shell 2 with the clamping hole 21, the connection line of the hinged end 321 and the connection line is projected to form an acute angle with the shadow on the inner wall of one side of the shell 2 with the clamping hole 21, the extrusion rod 32 is obliquely placed on the inner wall of one side of the shell 2 with the clamping hole 21, when the connecting piece 31 pushes the extrusion rod 32 towards the clamping hole 21, the extrusion end 321 of the extrusion rod 32 is pushed to move on the inner wall of the clamping hole 21, and due to the hinging of the hinged end, the extrusion rod 32 can only move towards the center of the clamping hole 21, and the clamping part is drawn close to the center of the clamping hole 21 in this way. In addition, when the connecting member 31 moves away from the clamping hole 21, the pressing end 321 of the pressing rod 32 moves on the inner wall of the clamping hole 21 by a pulling force, and moves away from the center of the clamping hole 21.

Further, for one or more embodiments, the pressing end 321 is cylindrical, and the cylindrical circumference is disposed on the inner wall of the housing 2 on the side where the clamping hole 21 is formed and attached to the clamping portion.

Because the structure of the extrusion end 321 is cylindrical, and meanwhile, the cylindrical circumferential surface is placed on the inner wall of the side, provided with the clamping hole 21, of the shell 2 and is attached to the clamping part, the contact area between the extrusion end 321 and the inner wall of the shell 2 can be reduced, so that the friction force generated when the extrusion end 321 moves is reduced, and the clamping of the nut is smoother.

For one or more embodiments, the clamping portion includes a limiting seat 41 fixed on the inner wall of one side of the housing 2 where the clamping hole 21 is formed and a clamping member 42 slidably connected to the limiting seat 41, one end of the clamping member 42 close to the center of the clamping hole 21 is a clamping end, and the sliding direction of the clamping end is the direction of a connection line between the clamping end and the center of the clamping hole 21.

Through setting up spacing seat 41 and the holder 42 that matches each other, ensure that holder 42 only can move towards the exposed core in spacing seat 41 with the line direction at centre gripping hole 21 center, improve the stability to the nut centre gripping, avoid because the rocking of holder 42 causes the centre gripping unstability.

Further, for one or more embodiments, an elastic element 43 for resetting the clamping member 42 is disposed between the clamping member 42 and the limiting seat 41.

When the nut is disassembled, the clamping piece 42 is pushed towards the clamping hole 21 by the pushing part, the elastic element 43 is stretched, and the clamping piece 42 has the tendency of resetting under the action of the elastic element 43; after the nut is disassembled, the pushing part resets and does not push the clamping piece 42 any more, and the elastic element 43 pulls the clamping piece 42 to reset, so that the next nut is disassembled conveniently.

The elastic element 43 may be a spring, an elastic sheet, a rubber band, or the like.

Further, for one or more embodiments, the limiting seat 41 is provided with a sliding groove, the direction of the sliding groove is a direction of a connection line between the clamping end and the center of the clamping hole 21, the sliding groove includes an upper channel 411 and a lower channel 412 which are overlapped, an end of the clamping member 42 away from the clamping end and an extrusion end 321 which penetrates through the upper channel 411 penetrate through the lower channel 412, the extrusion end 321 is attached to an end of the clamping member 42 away from the clamping end, wherein the end surface diameter of the extrusion end 321 is smaller than the height of the lower channel 412, and the width of the circumferential surface of the extrusion end 321 is smaller than the width of the lower channel 412 and larger than the width of the upper channel 411.

The cylindrical pressing end 321 and the end of the clamping member 42 away from the clamping end are placed into the lower channel 412, and since the pressing end 321 is cylindrical, the diameter of the end surface is smaller than the height of the lower channel 412, and the width of the circumferential surface is smaller than the width of the lower channel 412 and larger than the width of the upper channel 411, the pressing end 321 can slide and rotate in the lower channel 412. When the connecting block moves towards the clamping hole 21, the pressing end 321 is pressed to slide towards the center of the clamping hole 21 in the lower channel 412 and rotate at the same time, and the clamping piece 42 is pushed to move towards the clamping hole 21, and at the same time, the rod body on the pressing rod 32 close to the pressing end 321 also moves in the upper channel 411. In this way, the working process of the pressing end 321 and the clamping member 42 can be ensured to be stable enough, and the problems of dislocation, deflection and the like can be avoided.

Further, for one or more embodiments, a protrusion 421 is disposed on one side of the holding member 42, the protrusion 421 is located in the upper slot 411, and a barrier strip for limiting the movement of the protrusion 421 toward the holding hole 21 extends from an inner wall of the upper slot 411.

By the cooperation of the protrusion 421 and the stop 4111, the clamping member 42 is prevented from moving too far toward the clamping hole 21 under the action of the pressing end 321, so that the clamping member 42 is prevented from falling out of the lower groove 412, and the device is prevented from being damaged.

In addition, the device can be provided with a limiting mechanism which can stop the rotation of the connecting rod 1, the rotation of the connecting rod 1 can be firstly carried out to define the clamping interval, and then the connecting rod 1 and the clamping mechanism are relatively static through the limiting mechanism, so that the clamping interval can be adjusted without being influenced by the rotation of the connecting rod 1.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A screw type nut dismounting device is characterized by comprising a connecting rod (1) and a clamping mechanism, wherein one end of the connecting rod (1) is a pushing end (11), and the other end of the connecting rod is a driving end; the clamping mechanism comprises a shell (2) with a cavity, and a pushing part and a clamping part which are arranged in the cavity, wherein clamping holes (21) and threaded holes (22) are respectively formed in two sides of the shell (2), a plurality of clamping parts are arranged on the periphery of each clamping hole (21), and the clamping ends of the clamping parts face the clamping holes (21); the threaded hole (22) penetrates through the connecting rod (1) and is in threaded connection with the circumferential surface of the connecting rod (1) so as to enable the connecting rod (1) to rotate anticlockwise from the driving end to the propelling end (11) and drive the propelling end (11) to enter one end of the shell (2) and penetrate into the shell (2); the propelling part is provided with a propelling piece, and the propelling piece can be matched with the deep pushing of the propelling part (11) and the clamping end of the clamping part is close to the clamping hole (21) direction.

2. A screw nut dismounting device according to claim 1, characterized in that said pushing part comprises a connecting member (31) slidably connected to said housing (2) and having a sliding direction parallel to the moving direction of said pushing end (11), said connecting member (31) being rotatably connected to said pushing end (11) on one side and being provided with a pressing rod (32) as a pushing member on the other side, said pressing rod (32) having a pressing end (321), said pressing end (321) being capable of pushing the clamping end of said clamping part to move towards said clamping hole (21).

3. A screw-type nut dismounting device according to claim 2, wherein the end of the extrusion rod (32) away from the extrusion end (321) is a hinged end, the hinged end is hinged to the connecting member (31) for enabling the extrusion end (321) of the extrusion rod (32) to approach to the center of the clamping hole (21) with the hinged position as the axis, the extrusion end (321) is placed on the inner wall of the side of the casing (2) where the clamping hole (21) is opened, and the line connecting the hinged end and the extrusion end (321) and the shadow projected by the line on the inner wall of the side of the casing (2) where the clamping hole (21) is opened are arranged in an acute angle.

4. A screw-type nut dismounting device according to claim 3, characterized in that said pressing end (321) is cylindrical in configuration, said cylindrical circumference being disposed on an inner wall of said housing (2) on a side thereof where said holding hole (21) is formed and abutting said holding portion.

5. A screw-type nut dismounting device according to claim 1, wherein said clamping portion comprises a position-limiting seat (41) fixed on an inner wall of a side of said casing (2) having said clamping hole (21), and a clamping member (42) slidably connected to said position-limiting seat (41), one end of said clamping member (42) near the center of said clamping hole (21) is a clamping end, and a sliding direction thereof is a direction of a line connecting said clamping end and the center of said clamping hole (21).

6. A screw-type removal nut device according to claim 5, characterized in that an elastic element (43) is provided between said clamping member (42) and said stop (41) for restoring said clamping member (42).

7. A screw nut dismounting device according to claim 5, characterized in that said limiting seat (41) is provided with a sliding slot, the slot direction of said sliding slot is the direction of the line connecting said holding end and the center of said holding hole (21), said sliding slot comprises an upper slot (411) and a lower slot (412) which are overlapped, an end of said holding member (42) far away from said holding end and a pressing end (321) passing through said upper slot (411) are penetrated in said lower slot (412), said pressing end (321) is attached to an end of said holding member (42) far away from said holding end, wherein the end diameter of said pressing end (321) is smaller than the height of said lower slot (412), and the width of the circumferential surface of said pressing end (321) is smaller than the width of said lower slot (412) and larger than the width of said upper slot (411).

8. A screw-type nut dismounting device according to claim 7, characterized in that said holding member (42) is provided at one side thereof with a projection (421), said projection (421) being located in said upper channel (411), and a bar extending from an inner wall of said upper channel (411) for limiting the movement of said projection (421) toward said holding hole (21).