TWI736162B - Screw removal tool - Google Patents

Abstract

A screw removal tool is provided, including a rod, a retaining ring, a plug and a slip sleeve. The rod has a connecting opening and at least one inlay opening which is communicated with the connecting opening. The retaining ring is disposed on the rod. The plug is inserted into the connecting opening. The plug includes at least one limit portion which is adapted for being interfere with the retaining ring. The slip sleeve is slidably arranged on the rod.

Description

Screw removal tool

The invention relates to a screw removal tool.

Fasteners are mechanical components that can mechanically connect or fix at least two components together. Common ones include screws, rivets, nails, flanges, screws, pins, etc. Among them, screws are the most common, and the head of a general screw There will be a cross groove or a flat groove to match the use of a cross and flat screwdriver. In order to improve the anti-theft ability and prevent important components from being disassembled by unintended persons, some screws will use special-shaped grooves, which must be matched with a special drive head. This type of screw is an anti-theft screw.

However, when the groove of the screw head is broken, the screwdriver cannot be inserted to remove the screw, or the driver head of the anti-theft screw cannot be smoothly driven when the driver head of the anti-theft screw is lost or not nearby. Removal will cause great inconvenience no matter what the situation.

Therefore, it is necessary to provide a novel and progressive screw removal tool to solve the above-mentioned problems.

The main purpose of the present invention is to provide a screw removal tool, which can combine inserts of different shapes and sizes through a tightening piece, and then remove the screw through the insert.

In order to achieve the above objective, the present invention provides a screw removal tool, which includes a rod body, a tightening member, an insert, and a sliding sleeve. The rod body includes an axis line and a set of terminals. The extension direction of the axis line is defined as the axial direction, and the direction perpendicular to the axis center line is the radial direction. The assembly terminal is provided with a set of interfaces in the axial direction. In addition, the assembly end is radially provided with at least one insertion opening communicating with the set of interfaces, and the at least one insertion opening further penetrates the assembly end in the axial direction. The tightening member can be sleeved on the rod body in a radially deformable manner, and a part of the tightening member spans the at least one slot. The plug-in is adapted to be embedded in a screw and inserted into the set of interfaces along the axial direction. The plug-in includes at least one restricting portion, the at least one restricting portion penetrates the at least one socket, and the at least one restricting portion includes In the radial direction, there are a concave portion and a first convex portion of relatively concave and convex. When the plug-in is inserted into a preset position, the first convex portion passes through the clamping element, and the concave portion corresponds to the clamping element. The sliding sleeve is slidably disposed on the assembly end, and can selectively stop and limit the tightening member in the radial direction; wherein, when the insert is located at the preset position and the sliding sleeve radially stops the tightening member At this time, the part of the clamping element is between the sliding sleeve and the concave portion in the radial direction, and the farthest distance from the first convex portion to the axis line is greater than the distance between the clamping element and the axis line For the shortest distance, the first protrusion and the tightening member are in an interfering relationship in the axial direction.

1: Rod body

11: axis line

12: Outer ring wall

13: Ring groove

131: Port

14: Assembling end

141: group interface

142: Cinch

143: Wall

144: internal space

15: drive end

16: elastic parts

2,2A: Tightening parts

3, 3A, 3B, 3C: plug-in

31, 31A: Limiting part

311, 311A: first convex part

312, 312A: second convex part

313: Concave

32, 32A: The first embedded part

33, 33A: The second embedded part

34: cutter head

35: Kit

4: sliding sleeve

41: Chamfer

5: Resistance ring

6: Screw

Fig. 1 is a perspective view of the first embodiment of the present invention.

Fig. 2 is a schematic diagram of the plug-in detachment lever body of the first embodiment of the present invention.

Fig. 3 is an exploded view of the first embodiment of the present invention.

Fig. 4 is a partial enlarged view of the assembling end of the first embodiment of the present invention.

Fig. 5 is a cross-sectional view of Fig. 2.

6 and 7 are schematic diagrams of the operation of assembling the plug-in unit to the rod body according to the first embodiment of the present invention.

Fig. 8 is a diagram of the use state of the first embodiment of the present invention.

Fig. 9 is a schematic diagram of the plug-in deformation matching screw of the first embodiment of the present invention.

Fig. 10 is a plug-in of the second embodiment of the present invention.

11 and 12 are schematic diagrams of the operation of assembling the plug-in unit to the rod body according to the third embodiment of the present invention.

Fig. 13 is a partial enlarged view of Fig. 11.

The following examples are only used to illustrate the possible implementation aspects of the present invention, but they are not intended to limit the scope of protection of the present invention, and are described first.

Please refer to FIGS. 1 to 9, which show an embodiment of the present invention. The screw removal tool of the present invention includes a rod body 1, a tightening member 2, an insert 3 and a sliding sleeve 4.

Specifically, the rod body 1 includes an axis line 11 and a set of terminals 14, which define the extension direction of the axis line 11 as the axial direction, and the direction perpendicular to the axis line 11 as the radial direction. The end 14 is provided with a set of interfaces 141 in the axial direction, and the assembly end 14 is radially provided with at least one slot 142 communicating with the set of interfaces 141, and the at least one slot 142 further penetrates the assembly end in the axial direction 14. The tightening member 2 is sleeved on the rod body 1 in a radially deformable manner, and a portion of the tightening member 2 straddles the at least one insertion opening 142. In the first embodiment, the tightening member 2 is C-ring.

More specifically, the insert 3 is adapted to be embedded in a screw 6 which is inserted into the set of interfaces 141 in the axial direction. The plug-in 3 includes at least one limiting portion 31, the at least one limiting portion 31 penetrates the at least one insertion opening 142 in the axial direction, and the at least one limiting portion 31 includes a concave portion 313 which is relatively concave and convex in the radial direction. And a first convex When the insert 3 is inserted into a predetermined position, the first convex portion 311 passes through the clamping element 2, and the concave portion 313 corresponds to the clamping element 2. In addition, the sliding sleeve 4 is slidably disposed on the assembling end 14 and can selectively stop and limit the tightening member 2 in the radial direction.

Wherein, when the insert 3 is located at the preset position and the sliding sleeve 4 radially stops the clamping element 2, a part of the clamping element 2 is located between the sliding sleeve 4 and the recess 313 in the radial direction , And the farthest distance from the first convex portion 311 to the axis line 11 is greater than the shortest distance from the clamping piece 2 to the axis line 11, and then the first convex portion 311 and the clamping piece 2 are on the axis The upward blocking interference relationship allows the plug-in 3 to be stably constrained on the rod body 1.

In the first embodiment, the plug-in 3 further includes a first embedding portion 32 and a second embedding portion 33 that can be selectively embedded into the screw member 6, the first embedding portion 32 and the second embedding portion 33 Located on two opposite sides of the at least one limiting portion 31; wherein, one of the first embedding portion 32 and the second embedding portion 33 can be inserted into the set of interfaces 141 in the axial direction, leaving the other exposed on the rod body 1, so that users can choose according to the situation. In addition, the at least one limiting portion 31 further includes a second convex portion 312. The concave portion 313 is located between the first convex portion 311 and the second convex portion 312, and the first convex portion 311 is closer to the second convex portion 312. The embedding portion 33, the second convex portion 312 is closer to the first embedding portion 32, when the second embedding portion 33 is inserted into the set of interfaces 141 and the sliding sleeve 4 radially stops the tightening part 2, the first The convex portion 311 is used to prevent interference with the tightening member 2 in the axial direction. When the first embedding portion 32 is inserted into the set of interfaces 141 and the sliding sleeve 4 stops the tightening member 2 radially, the second The convex portion 312 is used to prevent interference with the tightening member 2 in the axial direction; wherein, as shown in FIG. 7, the lengths of the first embedding portion 32 and the second embedding portion 33 in the axial direction and the outer contour shape respectively There is a slight difference. For example, the length of the first embedding portion 32 in the axial direction is shorter than that of the second embedding portion 33, and the outer contour of the first embedding portion 32 is tapered. Therefore, the end of the second convex portion 312 is designed as Plane, the end of the first convex portion 311 is pointed for easy use When in use, the first convex portion 311 and the sliding sleeve 4 are in line contact, and the second convex portion 312 is in surface contact with the sliding sleeve 4.

Since the shape of the screw 6 has various shapes and sizes, a variety of corresponding plug-ins 3 are needed for selection. Therefore, the plug-in 3 can also be implemented in the second embodiment of FIG. 10 in addition to the above-mentioned aspects. As shown in the example, the insert 3B includes a cutter head 34 and a sleeve 35. The cutter head 34 passes through the sleeve 35 and can be inserted into a target (such as a screw) under external force. The sleeve 35 is provided with at least one limiting portion 31A. It is positioned on the rod body 1 shown in the first embodiment.

Please further refer to the first embodiment of FIGS. 1-9. The first embedded portion 32 and the second embedded portion 33 are made of deformable materials, such as copper. When the screw 6 is an anti-theft screw, since the head of the screw 6 has a groove with a special shape, it needs a driving head with a matching shape to rotate. At this time, if there is no matching drive The screw removal tool can be used when heading. The method of use is to gradually insert the embedded part (the first embedded part 32 or the second embedded part 33) into the groove of the head of the screw 6 through external force. Inside, during the embedding process, the embedding part of the deformable material will be squeezed to gradually form a matching shape, and then a matching new insert 3A is formed for rotating the screw 6, which is quite convenient.

Preferably, the first embedding portion 32 has a cone shape, the second embedding portion 33 has a cylindrical shape, the port diameter of the first embedding portion 32 is different from the port diameter of the second embedding portion 33, and the The length of an embedding portion 32 is different from the length of the second embedding portion 33, so that a single plug-in 3 can be applied to at least two kinds of screws 6 of different shapes or usage requirements.

Preferably, one end of the rod body 1 relative to the assembly end 14 is a driving end 15, and the driving end 15 has a polygonal shape so as to be used for socketing, rotating or beating with a hand tool.

It is worth mentioning that the assembly end 14 further includes an internal space 144, the internal space 144 is connected to the set of interfaces 141, and an elastic member 16 is accommodated in the internal space 144 to spring against the plug-in 3, the elastic The member 16 can additionally provide pushing force and restoring force to the plug-in 3 to ensure that the plug-in 3 can stably resist the screw 6. In the first embodiment, one end of the elastic member 16 is sleeved on the plug-in 3 (the first embedding portion 32 or the second embedding portion 33).

In more detail, when the insert 3 is inserted into the preset position and the sliding sleeve 4 radially stops the clamp member 2, the at least one limiting portion 31 is axially aligned with the at least one insertion opening 142 A wall portion 143 is spaced a distance apart, the elastic member 16 pushes against the plug-in 3 so that the at least one limiting portion 31 normally has a tendency to move away from the wall portion 143, and the elastic member 16 allows the plug-in 3 to move away from the wall 143. It is kept in a suspended state during use, and it is convenient for the user to take when the sliding sleeve 4 moves backward without stopping and restraining the tightening part 2. Wherein, in the axial direction, the size of the concave portion 313 is larger than the size of the clamping element 2. During the knocking process, the concave portion 313 and the clamping element 2 can slide relatively. In more detail, when the second embedding portion 33 is inserted into the set of interfaces 141 and is located at the preset position, in the axial direction, the length (L1) of the concave portion 313 is at least one of the length (L1) of the first convex portion 311 and the surrounding structure. The ratio of the distance (L2) of the wall portion 143 of the socket 142 is greater than 2, so that the recess 313 has more space in the axial direction to accommodate the tightening member 2 of different sizes.

In the first embodiment, the cross section of the clamping element 2 is circular to facilitate sliding relative to the concave portion 313, and in the radial direction, based on the outer diameter of the first convex portion 311, the clamping element 2 The wire diameter is smaller than the depth of the concave portion 313 so as to be completely embedded in the concave portion 313 to stop the first convex portion 311 or the second convex portion 312. In addition, the number of the at least one limiting portion 31 is two and is arranged symmetrically, so as to uniformly generate a stopping and limiting force. In addition, the number of the at least one insertion opening 142 and the number of the at least one limiting portion 31 are both two, and the two insertion openings 142 are symmetrically arranged with the axis 11 as the center.

It should be particularly noted that an outer ring wall 12 of the rod body 1 is recessed with a ring groove 13 which extends along the circumference of the rod body 1 and communicates with the at least one caulking opening 142, the tightening member 2 The ring groove 13 is embedded in the ring groove 13 in a ring-shaped and limited position; wherein, the inner diameter of the tightening member 2 is smaller than the maximum size of the insert 3 in the radial direction, so When the plug-in 3 is to be inserted into the predetermined position, the first convex portion 311 or the second convex portion 312 will radially support the clamping member 2, and after passing, the clamping member 2 will return to the original position. The recess 313 is embedded in the radial dimension.

In the first embodiment, when the sliding sleeve 4 does not cover the clamping element 2, part of the clamping element 2 protrudes from the outer ring wall 12, so when the sliding sleeve 4 faces the clamping element 2 When moving, the sliding sleeve 4 will further force the tightening member 2 to contract and penetrate deep into the annular groove 13 so as to reliably achieve the purpose of limiting the insert 3.

Preferably, the sliding sleeve 4 is provided with a chamfered portion 41 toward one end of the set of interfaces 141 so as to smoothly touch and guide the tightening member 2 to shrink and deform.

Preferably, a resistance ring 5 is provided between the assembling end 14 and the sliding sleeve 4, and the resistance ring 5 is positioned at one of the assembling end 14 and the sliding sleeve 4, when the sliding sleeve 4 During the sliding process, the resistance ring 5 slides against the other to increase the sliding resistance, so as to prevent the sliding sleeve 4 from unexpectedly sliding and causing the insert 3 to detach.

Preferably, at least one through opening 131 is formed where the annular groove 13 and the at least one insertion opening 142 communicate with each other, and the edge of the at least one through opening 131 is flared toward the at least one insertion opening 142, The function of this flaring is to additionally provide a deformation margin to cross the portion of the hoop member 2 of the at least one insertion opening 142, when the portion of the hoop member 2 here is affected by the first convex portion 311 or the second When the two convex parts 312 are stretched outward, there can be more angles of the stretch direction and space.

It should be additionally noted that, in the third embodiment of FIGS. 11 to 13, the inner diameter of the clamping member 2A is larger than the maximum dimension of the insert 3C in the radial direction. Therefore, when the part of the insert 3C passes through the clamping member When 2A is inserted into the set of interfaces 141, the clamping member 2A will not be stretched. For example, when the first embedding portion 32A is to be used, the second embedding portion 33A is inserted into the set of interfaces 141, and the first convex portion 311A directly passes through the tightening part 2A, and then controls the sliding sleeve 4 to move to resist the tightening The hoop 2A is retracted, this configuration can also be achieved The tightening member 2A limits the purpose of blocking the insert 3C. In this third embodiment, the first protrusion 311A and the second protrusion 312A do not contact the sliding sleeve 4.

1: Rod body

11: axis line

141: group interface

142: Cinch

144: internal space

15: drive end

16: elastic parts

2: Tightening parts

3: plugin

31: Limiting part

32: The first embedded part

33: The second embedded part

4: sliding sleeve

Claims (10)

A screw removal tool, including: A rod body includes an axis line and a set of terminals. The extension direction of the axis line is defined as the axial direction, and the direction perpendicular to the axis line is the radial direction. The assembly terminal is provided with a set of interfaces in the axial direction. , And the assembly end is radially provided with at least one insertion opening communicating with the set of interfaces, and the at least one insertion opening further penetrates the assembly end in the axial direction; A tight band member that can be sleeved on the rod body in a radially deformable manner, and a part of the tight band member straddles the at least one caulking; A plug-in for being embedded in a screw, inserted into the set of interfaces along the axial direction, including at least one limiting portion, the at least one limiting portion penetrates into the at least one socket, and the at least one limiting portion includes the diameter A concave portion and a first convex portion that are relatively concave and convex upwardly, when the insert is inserted to a predetermined position, the first convex portion passes through the clamping piece, and the concave portion corresponds to the clamping piece; and A sliding sleeve is slidably arranged on the assembly end, and can selectively stop and limit the tightening member in the radial direction; Wherein, when the insert is located at the preset position and the sliding sleeve radially stops the clamping element, a part of the clamping element is located between the sliding sleeve and the concave portion in the radial direction, and the first convex The farthest distance from the part to the axis line is greater than the shortest distance from the tightening part to the axis line, and the first convex part and the tightening part are in an interfering relationship in the axial direction. The screw removal tool according to claim 1, wherein the plug-in further includes a first embedded portion and a second embedded portion, and the first embedded portion and the second embedded portion are located opposite to the at least one limiting portion Two sides; wherein, one of the first embedding portion and the second embedding portion can be inserted into the set of interfaces along the axial direction so that the other is exposed to the rod body. The screw removal tool according to claim 2, wherein the at least one limiting portion further includes a second convex portion, the concave portion being interposed between the first convex portion and the second convex portion, and the first convex portion Part is closer to the second embedding part, and the second convex part is closer to the first embedding part; wherein, when the second embedding part is inserted into the set of interfaces and the sliding sleeve radially stops the tightening part, the first A convex part is used to prevent interference with the clamping part in the axial direction. When the first insertion part is inserted into the set of interfaces and the sliding sleeve radially blocks the clamping part, the second convex part is used to interact with The tightening members block interference with each other in the axial direction. The screw removal tool according to claim 1, wherein the assembly end further includes an internal space, the internal space communicates with the set of interfaces, and an elastic member is accommodated in the internal space to spring against the plug-in unit. The screw removal tool according to claim 4, wherein when the insert is inserted into the preset position and the sliding sleeve radially stops the tightening member, the at least one limiting portion is axially aligned with the surrounding structure A wall of at least one slot is separated by a distance, and the elastic member pushes against the insert so that the at least one limiting portion normally has a tendency to move away from the wall; wherein, in the axial direction, the size of the recess is Greater than the size of the tightening member, the recess and the tightening member can slide relatively. The screw removal tool according to claim 1, wherein a resistance ring is provided between the assembly end and the sliding sleeve, and the resistance ring is positioned at one of the assembly end and the sliding sleeve, when the When the sliding sleeve is sliding, the resistance ring slides against the other one. The screw removal tool according to any one of claims 1 to 6, wherein an outer ring wall of the rod body is recessed with a ring groove extending along the circumference of the rod body and communicating with the at least one insert The tightening member is annularly embedded in the ring groove with a limit; wherein, at least one through opening is formed where the ring groove and the at least one caulking are communicated with each other, and the mouth edge of the at least one through opening faces the at least one The direction of a caulk forms a flaring. The screw removal tool according to any one of claims 1 to 6, wherein an outer ring wall of the rod body is recessed with a ring groove extending along the circumference of the rod body and communicating with the at least one insert口, the tightening member is annularly embedded in the annular groove in a limiting manner; wherein the inner diameter of the tightening member is smaller than the maximum size of the insert in the radial direction. The screw removal tool according to any one of claims 1 to 6, wherein an outer ring wall of the rod body is recessed with a ring groove extending along the circumference of the rod body and communicating with the at least one insert口, the tightening member is annularly embedded in the annular groove in a limiting manner; wherein, the inner diameter of the tightening member is larger than the maximum size of the insert in the radial direction. The screw removal tool according to claim 3, wherein the assembly end further includes an internal space, the internal space communicates with the set of interfaces, and an elastic member is accommodated in the internal space to spring against the plug; When inserted to the preset position and the sliding sleeve radially stops the clamp member, the at least one limiting portion is spaced from a wall portion of the at least one recess of the enclosure in the axial direction by a distance, and the elastic member pushes against The insert allows the at least one limiting portion to normally move away from the wall portion; wherein, in the axial direction, the size of the recess is larger than the size of the tightening member, and both the recess and the tightening member Can slide relatively; a resistance ring is arranged between the assembly end and the sliding sleeve, and the resistance ring is positioned at one of the assembly end and the sliding sleeve, when the sliding sleeve is in the sliding process, the The resistance ring slides against the other; one of the outer ring walls of the rod body is recessed with a ring groove, the ring groove extends along the circumference of the rod body and communicates with the at least one caulking, the tightening member is ring-shaped and limited Is embedded in the ring groove; wherein at least one opening is formed where the ring groove and the at least one caulking are communicated with each other, and the edge of the at least one opening is flared toward the direction of the at least one caulking; The inner diameter of the hoop is smaller than the maximum size of the insert in the radial direction; the number of the at least one limiting portion is two and is symmetrically arranged; the number of the at least one slot is two, and the two slots are centered on the axis The line is symmetrically arranged at the center; when the sliding sleeve does not cover the hoop member, a part of the hoop member protrudes from the outer ring wall; the first embedding part is in the shape of a cone, and the second embedding part is in the shape of a cone. Cylindrical; the first embedded part and the second embedded part are made of deformable materials; the port diameter of the first embedded part is different from the port diameter of the second embedded part; the length of the first embedded part Different from the length of the second embedding part; one end of the elastic member is sleeved on the insert; the first convex part is in line contact with the sliding sleeve, and the second convex part is in surface contact with the sliding sleeve; the tightening band The cross section of the component is circular. In the radial direction, based on the outer diameter of the first convex portion, the wire diameter of the tightening component is smaller than the depth of the concave portion; When setting the position, in the axial direction, the ratio of the length of the concave portion to the distance between the first convex portion and the wall portion of the at least one slot of the enclosing structure is greater than 2; the tightening member is a C-ring; the sliding sleeve faces One end of the group of interfaces is provided with a chamfered portion; and the end of the rod body relative to the group connection end is a driving end, and the driving end is polygonal.

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