CN208005558U - A kind of screw clamp - Google Patents

Abstract

The utility model discloses a kind of screw clamp, including the first fixed component and the second fixed component, first fixed component can fixing screws operation instrument, second fixed component being capable of fixing screws；Second fixed component is rotatably connected at first fixed component, and the screw operation instrument can assemble the screw in the screw clamp.The there is provided screw clamp of the utility model, the first fixed component, the second fixed component are mutually fixed with screw operation instrument, screw respectively, when being assembled to screw, are operated with Hand supplementary without operating personnel, the dismounting of screw is more convenient, disassembly efficiency higher；What is more important, first fixed component, the second fixed component can relatively rotate, when in use, it can not be with screw operation instrument synchronous rotary with fixed second fixed component of screw, and then the interference of the second fixed component and other component in installation space is avoided, to realize installation of the screw in the small space limited there are space.

Description

A kind of screw clamp

Technical field

The utility model is related to mechanical fitting technical field, more particularly to it is a kind of it is detachable, make suitable for small space Screw clamp.

Background technology

Screw is a kind of common connector, and spiral shell can be used when in use for fixing adjacent two or more components The silk operation instruments such as knife or allen wrench load and unload screw.

For some non-screws made of iron, when mounted, it usually needs a hand steered firmly screw, another hand operate screw The tightening screws such as knife or allen wrench, alternatively, can also first by screw screw in screw hole a part, then again use screwdriver or The tightening screws such as allen wrench.However, when encountering that working environment is narrow and screw sizes are smaller, operating personnel are difficult to directly Screw auxiliary installation is clutched, this there is the difficult problem of screw dismounting, even, careless slightly also to make in dismounting It accidentally drops to fall at screw and easy-to-search or is not difficult to the region taken out at some, seriously affect working efficiency.

For the above situation, a kind of screw clamp exists in the prior art, screw can be fixed on to screwdriver or interior hexagonal is pulled The head of the operation instruments such as hand, in order to the dismounting of screw.

But screw clamp in the prior art can with operation instrument synchronous rotary, when installation space is especially narrow, there are skies Between when limiting, the other component around installation space can generate interference to the rotation of screw clamp, and screw be caused to be difficult to install.

Therefore, how a kind of screw clamp is provided, is still those skilled in the art in order to which screw is in the installation of small space Technical problem urgently to be resolved hurrily.

Utility model content

The purpose of this utility model is to provide a kind of screw clamp, the first fixed component and the second fixed component of the screw clamp It can relatively rotate, in use, can not be revolved with screw operation instrument is synchronous with fixed second fixed component of screw Turn, to avoid the interference of other component in the second fixed component and installation space, to realize that screw is being limited there are space Installation in small space.

In order to solve the above technical problems, the utility model provides a kind of screw clamp, including the first fixed component and second is consolidated Determine component, first fixed component can fixing screws operation instrument, second fixed component being capable of fixing screws；It is described Second fixed component is rotatably connected at first fixed component, and the screw operation instrument can be in the screw clamp The screw is assembled.

The there is provided screw clamp of the utility model, the first fixed component, the second fixed component respectively with screw operation instrument, Screw is mutually fixed, in this way, when being assembled to screw, i.e., is operated with Hand supplementary without operating personnel, the dismounting of screw is more It is convenient, simultaneously, additionally it is possible to reduce the risk that screw in assembling process is fallen, efficiency of assembling can be greatly improved.

What is more important, above-mentioned first fixed component, the second fixed component can relatively rotate, when in use, with screw Fixed second fixed component can not be with screw operation instrument synchronous rotary, and then avoids the second fixed component and installation space The interference of interior other component, to realize installation of the screw in the small space limited there are space.

Optionally, first fixed component includes the first fixing piece, and the middle part of first fixing piece is equipped with described in confession The first through hole that screw operation instrument passes through；One end of first fixing piece is circumferentially spaced to be equipped with several tool claws, respectively The tool claw can fix the screw operation instrument.

Optionally, first fixed component further includes the first regulating part, and first regulating part is coated at each work Have claw, and the aperture of each tool claw can be adjusted.

Optionally, there is first regulating part tubular structure, inner wall to be equipped with thread segment and undergauge section, and described first adjusts Section part is connected by its thread segment with first fixing piece；The undergauge section offsets with each tool claw, and when described When first regulating part is gradually tightened against first fixing piece, the undergauge section can generate radially each tool claw Inside pushing force, to adjust the aperture of each tool claw.

Optionally, second fixed component includes the second fixing piece, and the middle part of second fixing piece is equipped with described in confession The second through-hole that screw operation instrument, the screw pass through；One end of second fixing piece is circumferentially spaced to be equipped with several spiral shells Claw is followed closely, each screw claw can fix the screw.

Optionally, second fixed component further includes the second regulating part, and second regulating part is coated at each spiral shell Claw is followed closely, and the aperture of each screw claw can be adjusted.

Optionally, second regulating part have tubular structure, inner wall be equipped with choke, the choke with it is each described Screw claw offsets；When relatively described second regulating part of second fixing piece generates axial displacement, the choke can Pushing force radially inward is generated to each screw claw, to adjust the aperture of each screw claw.

Optionally, further include switching part, the threaded one end of the switching part is connected to first fixed component, institute One of second fixed component is stated, the other end is rotatably connected at first fixed component, second fixed component The other of.

Optionally, the switching part includes several arc panels, and the inner wall of each arc panel is equipped with arc circumferentially Shape divides slot, each arc panel that can assemble to form tubular structure, and when each arc panel is in assembled state, each described The arc of arc panel divides slot that can be connected, and is enclosed annular groove；First fixed component and the switching part Connecting pin, periphery wall are equipped with protruding portion, which can be embedded in the annular groove, and can be rotated in the annular groove；Institute It states switching part and the connecting pin of second fixed component is equipped with external screw thread.

Optionally, the switching part is threadedly connected to second regulating part, and can be with the second fixing piece phase It supports；When the switching part is gradually tightened against second regulating part, the switching part can push the second fixing piece phase Axial displacement is generated to second regulating part.

Description of the drawings

Fig. 1 is provided a kind of structural schematic diagram of specific implementation mode of screw clamp by the utility model；

Fig. 2 is the sectional view of Fig. 1；

Fig. 3 is the explosive view of Fig. 1；

Fig. 4 is the structural schematic diagram of the first fixing piece；

Fig. 5 is the structural schematic diagram of the first regulating part；

Fig. 6 is the structural schematic diagram of the second fixing piece；

Fig. 7 is the structural schematic diagram of the second regulating part；

Fig. 8 is the side view of arc panel；

Fig. 9 is provided the usage state diagram of screw clamp by the utility model.

The reference numerals are as follows in Fig. 1-9：

1 first fixed component, 11 first fixing pieces, 111 first through hole, 112 tool claws, 113 protruding portions, 12 first are adjusted Save part, 121 thread segments, 122 undergauge sections；

2 second fixed components, 21 second fixing pieces, 211 second through-holes, 212 screw claws, 22 second regulating parts, 221 contractings Oral area；

3 screw operation instruments, 4 screws；

5 switching parts, 51 arc panels, 511 arcs divide slot, 52 annular grooves.

Specific implementation mode

In order to make those skilled in the art more fully understand the technical solution of the utility model, below in conjunction with the accompanying drawings and have The utility model is described in further detail for body embodiment.

It is described herein it is " several " be that exponential quantity is uncertain multiple, it is usually more than two；And when using " several " table When showing the quantity of certain several component, the quantity for being not offered as these components is identical.

The words such as " first " described herein, " second ", be merely for convenience of description scheme same or like two with On structure or component, be not offered as certain particular determination to sequence.

Please refer to Fig.1 the structural representation that -9, Fig. 1 is provided a kind of specific implementation mode of screw clamp by the utility model Figure, Fig. 2 are the section view of Fig. 1, and Fig. 3 is the explosive view of Fig. 1, and Fig. 4 is the structural schematic diagram of the first fixing piece, and Fig. 5 is adjusted for first The structural schematic diagram of part, Fig. 6 are the structural schematic diagram of the second fixing piece, and Fig. 7 is the structural schematic diagram of the second regulating part, and Fig. 8 is The side view of arc panel, Fig. 9 are provided the usage state diagram of screw clamp by the utility model.

As shown in Figs. 1-3, the utility model provides a kind of screw clamp, including the first fixed component 1 and the second fixed component 2, the first fixed component 1 can fixing screws operation instrument 3, which is specifically as follows screwdriver or interior hexagonal Spanner etc., the second fixed component 2 being capable of fixing screws 4.

It should be appreciated that " fixation " connection between above-mentioned second fixed component 2 and screw 4 is not consolidating in absolute sense It is fixed, it specifically refers to：When without outer force effect, the second fixed component 2 can be fallen with fixing screws 4 to avoid screw 4, when depositing In external force, such as the rotation abutting force that screw operation instrument 3 applies screw 4, screw 4 can be revolved from the second fixed component 2 Turn to stretch out, to be fastened in the threaded hole for waiting for connecting component；Similarly, the first fixed component 1 is same to the fixation of screw operation instrument 3 Sample is to be relatively fixed, and screw operation instrument 3 remains able to axially inside move in screw clamp, is rotated to apply to screw 4 Abutting force.

In other words, which is actually equivalent to human hand, and support positioning can be carried out to screw 4, and Second fixed component 2 can also match with the size of screw 4, the size regardless of screw 4, and the second fixed component 2 is Effective position can be carried out to it；And above-mentioned first fixed component 1, the second fixed component 2 match, then may make screw operative employee Tool 3 and 4 substantially coaxial setting of screw, so that screw operation instrument 3 operates screw 4.

Using the above structure, it when being assembled to screw 4, is operated with Hand supplementary without operating personnel, you can complete spiral shell The installation of nail 4, installation process are more convenient；Simultaneously as the effect of the second fixed component 2, when screw 4 does not produce completely, The risk that screw 4 is fallen can be also reduced, to greatly improve efficiency of assembling.

What is more important, the second fixed component 2 are rotatably connected at the first fixed component 1, i.e., the two can be opposite Rotation, when in use, for fixing screws the second fixed component 2 can not with 3 synchronous rotary of screw operation instrument, to avoid The interference of second fixed component 2 and other component in installation space, to realize screw 4 there are the small spaces that space limits Interior installation.

It is to be appreciated that above-mentioned second fixed component 2 is in use, do not rotate not necessarily, if installation is empty Between it is larger, there is no other component to screw clamp generate interference, at this point, due to mutual between the second fixed component 2 and screw 4 Active force, when screw 4 is rotated and stretched out, the second fixed component 2 can also rotate synchronously；And when installation space is narrow, installation is empty In when interfere there are more other component, the other component in installation space can form resistance to the periphery of the second fixed component 2 Gear, to limit the rotation of the second fixed component 2, at this point, turning screw operation instrument 3 again, the second fixed component 2 will not occur to turn It is dynamic.

As shown in figure 4, above-mentioned first fixed component 1 may include the first fixing piece 11, the middle part of the first fixing piece 11 can With equipped with the first through hole 111 passed through for screw operation instrument 3, if one end of the first fixing piece 11 circumferentially spaced can be equipped with Dry tool claw 112, when screw operation instrument 3 passes through above-mentioned first through hole 111, each tool claw 112 can grasp screw Make the formation of tool 3 to grip.

Specifically, above-mentioned each tool claw 112 all can be strip plate, one end of the strip plate and 11 phase of the first fixing piece Even, it is fixing end, is reflected in attached drawing 4, i.e. the lower end of tool claw 112, the other end is free end, i.e. each tool claw 112 Upper end.When there are outer force effect, which can move radially inwardly, to compress the spiral shell across first through hole 111 Operation instrument 3 is followed closely, and when external force reduces or disappears, which can radially spring back again by natural resiliency, with Release screw operation instrument 3.

Processing when, can on the peripheral wall of tubular structure several bar-shaped troughs axially extended of cut-space, adjacent two Platy structure between bar-shaped trough is above-mentioned tool claw 112, and each bar-shaped trough can be uniformly distributed circumferentially, i.e., so that each Tool claw 112 keeps approximately uniform size, to ensure the uniformity of the circumferential stress of screw operation instrument 3.Certainly, each tool Claw 112 can also be processed independently, and the first fixing piece 11 is then installed on.

The free end of above-mentioned each strip plate and the line of fixing end can be arranged with the axis of the first fixing piece 11 in angle, I.e. the free end of strip plate can slope radially inward setting, even if in this way, outer force effect, each tool claw 112 is not present Free end screw operation instrument 3 can still be compressed.

Specifically, each tool claw 112 can be by the gradual intilted platy structure of fixing end to free end, or The free end of person, the stationary jaw 112 can have the folding portion turned down inwardly, the folding portion that can equally play housing screw The effect of operation instrument 3.

The free end of above-mentioned each strip plate and the line of fixing end can also be substantially parallel with the axis of the first fixing piece 11, That is, the first through hole 111 that is enclosed of each tool claw 112 can substantially isometrical hole, each tool claw 112 itself Without the clamping function to screw operation instrument 3, at this point, then needing the first regulating part 12 of setting to coordinate above-mentioned first fixing piece 11 work.

As shown in figure 5, first regulating part 12 can be tubular structure, and it is coated at each tool claw 112, when the first tune Part 12 is saved when the periphery of each tool claw 112 is axially displaced, the aperture of each tool claw 112 can be adjusted.

In detail, the inner wall of the first regulating part 12 can be equipped with thread segment 121 and undergauge section 122, and the first regulating part 12 can To be connected with the first fixing piece 11 by its thread segment 121, undergauge section 122 can then offset with each tool claw 112.

When the first regulating part of rotation 12 is to be gradually tightened against the first fixing piece 11, undergauge section 122 can be to each tool card Pawl 112 generates pushing force radially inward, to turn the aperture of each tool claw 112 down, so that each 112 energy of tool claw Enough pinching screw operation instruments 3；If the first regulating part 12 is twisted toward opposite direction, each tool claw of 122 pairs of undergauge section 112 The pushing force applied reduces, and the free end of each tool claw 112 can be sprung back outward into automatically again by its own elasticity, to adjust The aperture of big each tool claw 112, and then release screw operation instrument 3.

Still using Fig. 5 as visual angle, thread segment 121 can be set to the lower end of the first regulating part 12, and undergauge section 122 can be set to The upper end of first regulating part 12, when mounted, each tool claw 112 of the first fixing piece 11 can be from the first regulating part 12 First regulating part 12 is stretched into lower section, and is gradually tightened against thread segment 121.

Above-mentioned undergauge section 122 is specifically as follows taper surface, and the internal diameter of the taper surface gradually increases from top to bottom, in conjunction with Fig. 2, During first regulating part 12 is gradually tightened from top to bottom, entire taper surface can be with the free end phase of each tool claw 112 It supports, and inside pushing force is generated to each work claw 112, gradually to reduce the aperture of each tool claw 112.

Moreover, during the first regulating part 12 is tightened, each tool claw 112 can be located at the first regulating part 12 It is internal, that is to say, that in use, each tool claw 112 can not be exposed so that the provided screw clamp of the utility model External structure it is more aesthetically pleasing, it is also possible to be protected to each tool claw 112, to avoid the damage during use. Certainly, each tool claw 112 can also stretch out the first regulating part 12, and when each tool claw 112 stretches out, and practical rise adjusts work It is then the miner diameter end of the taper surface.

The undergauge section 122 or annular lug or the step surface etc. for being set to 12 inner wall of the first regulating part, regardless of Using which kind of structure, as long as ensureing that opening for each tool claw 112 can be adjusted during the first regulating part 12 is axially moveable Degree, to realize the clamping and release of screw operation instrument 3.

Again as shown in fig. 6, above-mentioned second fixed component 2 may include the second fixing piece 21, the middle part of the second fixing piece 21 It can be equipped with the second through-hole 211 passed through for screw operation instrument 3 and screw 4, one end of the second fixing piece 21 can be along week To several screw claws 212 are equipped at intervals with, when screw 4 passes through above-mentioned second through-hole 211, each screw claw 212 can be to spiral shell Nail 4 is formed and is gripped.

Similar with aforementioned tools claw 112, the screw claw 212 or strip plate, one end is fixing end, with Second fixing piece 21 is connected, and is reflected in attached drawing 6, i.e. the upper end of screw claw 212, the other end is free end, i.e. screw claw 212 lower end.

Concrete structure, generation type and the matching relationship with the clamping and release of screw 4 of above-mentioned screw claw 212 Deng similar with tool claw 112 above-mentioned, this will not be repeated here.

As shown in fig. 7, above-mentioned second fixed component 2 can also include the second regulating part 22, the second regulating part 22 can be Tubular structure, and it is coated at each screw claw 212, when the second regulating part 22 is axially displaced in the periphery of each screw claw 212 When, the aperture of each screw claw 212 can be adjusted.

Specifically, the inner wall of the second regulating part 22 can be equipped with choke 221, choke 221 can be with each screw card The outer wall of pawl 212 offsets.

In conjunction with Fig. 2, when 22 opposite second fixing piece 21 of the second regulating part moves up in an axial direction, choke 221 can be to each Screw claw 212 generates pushing force radially inward, to turn the aperture of each screw claw 212 down so that each screw claw 212 It being capable of pinching screw 4；And when 22 opposite second fixing piece 21 of the second regulating part moves up in an axial direction, choke 221 is to each screw Pushing force caused by claw 212 reduces, and each screw claw 212 can radially be sprung back by natural resiliency, to tune up The aperture of each screw claw 212, to release screw 4.

With continued reference to FIG. 7, above-mentioned choke 221 can be set to the lower end of the second regulating part 22, it is specifically as follows edge Radially inward annular lug, alternatively, the choke 221 can also replace with the structure similar with aforementioned undergauge section 122.Peace When dress, each screw claw 212 of the second fixing piece 21 stretches into the second regulating part 22 from top to bottom, and enables choke 221 It offsets with the outer wall of each screw claw 212.

Unlike tool claw 112, which can stretch out the second regulating part 22, to check screw 4 Clamping situation.

For the screw clamp involved by the respective embodiments described above, following the utility model embodiment will be to the first fixed component 1, the rotation connection structure between the second fixed component 2 is described in detail.

Still as shown in Figs. 1-3, the provided screw clamp of the utility model can also include switching part 5, the switching part 5 One end can be connected to one of the first fixed component 1, second fixed component 2, and it is solid that the other end is rotatably connected at first The other of component 1, second fixed component 2 are determined, to realize that the rotation of the first fixed component 1, the second fixed component 2 connects It connects.

Specifically, the switching part 5 may include several arc panels 51, Fig. 8 is can refer to, the inner wall of each arc panel 51 is equal Arc circumferentially can be equipped with and divide slot 511, each arc panel 51 can splice, assemble and form tubular structure, and when in assembling When state, the arc of each arc panel 51 divides slot 511 that can be connected and is enclosed annular groove 52.

The connecting pin of above-mentioned first fixing piece 11 and switching part 5, periphery wall can be equipped with protruding portion 113, the protrusion Portion 113 can be embedded in annular groove 52, and the outer diameter of the protruding portion 113 is less than the internal diameter of annular groove 52, that is to say, that the first fixing piece 11 Portion 113 can be projected through to be freely rotated in the annular groove 52 of switching part 5.

Protruding portion 113 is specifically as follows the annular slab set on 11 periphery of the first fixing piece, alternatively, can also include several convex Block, the outer weekly interval that each convex block can surround the first fixing piece 11 is arranged, to form the protruding portion 113.

The connecting pin of 51 and second fixed component 2 of above-mentioned each arc panel, periphery wall can be equipped with segmented thread, be in group When dress state, each segmented thread can be that combination form complete external screw thread, and switching part 5 can be fastened to the by the external screw thread Two fixed components 2 are specifically fastened to the second regulating part 22, and the second regulating part 22, which can apply the periphery of each arc panel 51, to be fastened Power, so that each arc panel 51 can remain assembled state.

Although may be noted that the utility model embodiment does not limit the specific number of the arc panel 51 of composition switching part 5 Amount, still, the quantity of the arc panel 51 are few as far as possible, to simplify processing and installation process, meanwhile, it is also beneficial to ensure The structural stability for the switching part 5 that the assembling of each arc panel 51 is formed；Specific to the utility model embodiment, above-mentioned arc panel 51 Quantity can be two, the central angle corresponding to each arc panel 51 all can be 180 degree, to install.

Referring again to Fig. 2, when switching part 5 is screwed into the second regulating part 22, which can fix with second Part 21 offsets, and when switching part 5 is gradually tightened against the second regulating part 22, and switching part 5 can produce the second fixing piece 21 Raw pushing force axially downward, so that 21 opposite second regulating part 21 of the second fixing piece moves down in an axial direction, each screw claw 212 aperture becomes smaller.

That is, the aperture of screw claw 212 actually can be screwed into the second regulating part 22 by controlling switching part 5 Depth is adjusted.

And when switching part 5 rotates up, and progressively disengages the second regulating part 22, then it can pass through human hand or other tools Pushing and pressing screw claw 212 from bottom to top, so that 21 opposite second regulating part 22 of the second fixing piece moves up in an axial direction, choke The pushing force of 221 pairs of each screw claws 212 is gradually reduced, and can tune up the aperture of each screw claw 212.

The there is provided screw clamp of the utility model state in use can refer to Fig. 9, and screw 4 is fixed on screw clamp lower part In screw claw 212, screw operation instrument 3 passes through the inside of screw clamp, and offsets with the screw 4, to be grasped to screw 4 Make；When screw operation instrument 3 rotates, the second fixed component 2 can not rotate, and screw 4 can be rotated from screw claw 212 Stretch out, so as to set on wait for connecting component screw hole dock.

, it is emphasized that although installation of the provided screw clamp of the utility model especially suitable for small space inner bolt 4, Obviously, application is not limited to small space, can also be applied to other installation environments, in fact, needing to pacify in every case Cartridge screw 4 can be used the provided screw clamp of the utility model and carry out auxiliary installation.

Above are merely preferred embodiments of the utility model, it is noted that for the ordinary skill people of the art For member, without departing from the principle of this utility model, several improvements and modifications can also be made, these improvements and modifications Also it should be regarded as the scope of protection of the utility model.

Claims (10)

1. a kind of screw clamp, which is characterized in that including the first fixed component (1) and the second fixed component (2), described first fixes Component (1) can fixing screws operation instrument (3), second fixed component (2) being capable of fixing screws (4)；

Second fixed component (2) is rotatably connected at first fixed component (1), and the screw operation instrument can The screw is assembled in the screw clamp.

2. screw clamp according to claim 1, which is characterized in that first fixed component (1) includes the first fixing piece (11), the middle part of first fixing piece (11) is equipped with the first through hole (111) passed through for the screw operation instrument (3)；

One end of first fixing piece (11) is circumferentially spaced to be equipped with several tool claws (112), each tool claw (112) the screw operation instrument (3) can be fixed.

3. screw clamp according to claim 2, which is characterized in that first fixed component (1) further includes the first regulating part (12), first regulating part (12) is coated at each tool claw (112), and can adjust each tool claw (112) aperture.

4. screw clamp according to claim 3, which is characterized in that first regulating part (12) has tubular structure, in Wall is equipped with thread segment (121) and undergauge section (122), and first regulating part (12) passes through its thread segment (121) and described first Fixing piece (11) is connected；

The undergauge section (122) offsets with each tool claw (112), and when first regulating part (12) is gradually tightened against When the first fixing piece (11), the undergauge section (122) can generate radially inward each tool claw (112) Pushing force, to adjust the aperture of each tool claw (112).

5. according to any one of the claim 1-4 screw clamps, which is characterized in that second fixed component (2) includes the Two fixing pieces (21), the middle part of second fixing piece (21) is equipped with wears for the screw operation instrument (3), the screw (4) The second through-hole (211) crossed；

One end of second fixing piece (21) is circumferentially spaced to be equipped with several screw claws (212), each screw claw (212) screw (4) can be fixed.

6. screw clamp according to claim 5, which is characterized in that second fixed component (2) further includes the second regulating part (22), second regulating part (22) is coated at each screw claw (212), and can adjust each screw claw (212) aperture.

7. screw clamp according to claim 6, which is characterized in that second regulating part (22) has tubular structure, in Wall is equipped with choke (221), and the choke (221) offsets with each screw claw (212)；

When relatively described second regulating part (22) of second fixing piece (21) generates axial displacement, the choke (221) Pushing force radially inward can be generated to each screw claw (212), to adjust opening for each screw claw (212) Degree.

8. screw clamp according to claim 7, which is characterized in that further include switching part (5), the switching part (5) Threaded one end is connected to one of first fixed component (1), second fixed component (2), and the other end is rotationally It is connected to the other of first fixed component (1), second fixed component (2).

9. screw clamp according to claim 8, which is characterized in that the switching part (5) includes several arc panels (51), respectively The inner wall of the arc panel (51) is equipped with arc circumferentially and divides slot (511), each arc panel (51) that can assemble to be formed Tubular structure, and when each arc panel (51) is in assembled state, the arc of each arc panel (51) divides slot (511) equal It can be connected, and be enclosed annular groove (52)；

The connecting pin of first fixed component (1) and the switching part (5), periphery wall are equipped with protruding portion (113), this is prominent The annular groove (52) can be embedded in by going out portion (113), and being capable of the rotation in the annular groove (52)；

The connecting pin of the switching part (5) and second fixed component (2) is equipped with external screw thread.

10. screw clamp according to claim 9, which is characterized in that the switching part (5) is threadedly connected to described second and adjusts Part (22) is saved, and can be offseted with second fixing piece (21)；

When the switching part (5) is gradually tightened against the second regulating part (22), the switching part (5) can push Relatively described second regulating part (22) of two fixing pieces (21) generates axial displacement.