CN113910136A

CN113910136A - Clamp apparatus

Info

Publication number: CN113910136A
Application number: CN202111329207.XA
Authority: CN
Inventors: 聂磊; 石宝松; 付柯楠
Original assignee: Changchun Institute of Optics Fine Mechanics and Physics of CAS
Current assignee: Changchun Institute of Optics Fine Mechanics and Physics of CAS
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-01-11

Abstract

The invention provides a clamp which is used for clamping a circular workpiece and comprises a clamp frame, an upper fork clamp and a lower fork clamp; the clamp frame is of a frame structure and surrounds the upper fork clamp and the lower fork clamp; one end of the upper fork clamp is connected with the clamp frame, and the other end of the upper fork clamp is fixed with an upper V-shaped claw; one end of the lower fork clamp is connected with the clamp frame, and the other end of the lower fork clamp is fixed with a lower V-shaped claw; the upper V-shaped claw and the lower V-shaped claw are oppositely arranged and used for forming a rhombic area of a cylindrical surface for clamping a workpiece; the diamond-shaped area is formed by sequentially surrounding four planes facing the workpiece, and the size of the diamond-shaped area can be adjusted. The invention can adapt to workpieces with large-range diameter change by adjusting the size of the diamond-shaped area, thereby reducing the cost; simple structure, stability, raise the efficiency.

Description

Clamp apparatus

Technical Field

The invention relates to the field of workpiece clamping equipment, in particular to a clamp.

Background

Many round parts, equipment need to be clamped, such as round connectors. The circular connector is a connector type commonly used in the fields of military industry and aerospace, and when the circular connector is subjected to assembly operations such as welding and binding, the connector needs to be fixed by means of a clamp, so that an assembler can liberate two hands for operation, and a stable operation environment is obtained.

When traditional circular arc type or rhombus stationary jaw anchor clamps carry out the centre gripping operation, the circular connector of only adaptation certain diameter within range to being less than its minimum centre gripping diameter, can only use the filler to fill the gap, makes the stability of centre gripping descend, influences assembly efficiency simultaneously.

In view of the foregoing, there is a need for a clamp that can accommodate a wide range of diameter variations.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a jig capable of accommodating a workpiece having a wide range of diameter variations.

In order to achieve the purpose, the invention adopts the following specific technical scheme:

the clamp is used for clamping a circular workpiece and comprises a clamp frame, an upper fork clamp and a lower fork clamp;

the clamp frame is of a frame structure and surrounds the upper fork clamp and the lower fork clamp;

one end of the upper fork clamp is connected with the clamp frame, and the other end of the upper fork clamp is fixed with an upper V-shaped claw;

one end of the lower fork clamp is connected with the clamp frame, and the other end of the lower fork clamp is fixed with a lower V-shaped claw;

the upper V-shaped claw and the lower V-shaped claw are oppositely arranged and used for forming a rhombic area of a cylindrical surface for clamping a workpiece;

the rhombic area is formed by sequentially surrounding four planes facing the workpiece, and the size of the rhombic area can be adjusted;

at least one of the upper fork clamp and the lower fork clamp is elastically connected with the clamp frame, so that the distance between the upper V-shaped claw and the lower V-shaped claw can be adjusted to change the size of the rhombic area.

Further, the upper V-shaped claw comprises a first single claw and a second single claw, and the lower V-shaped claw comprises a third single claw and a fourth single claw;

the first single claw and the second single claw are arranged in a staggered manner, and the third single claw and the fourth single claw are arranged in a staggered manner;

the first single claw and the fourth single claw are arranged in a crossed manner;

the second single claw and the third single claw are arranged crosswise.

Furthermore, one end of the upper fork clamp is elastically connected with a clamp frame;

one end of the lower fork clamp is fixedly connected with the clamp frame.

Furthermore, one end of the upper fork fixture is fixed with a guide post, a guide sleeve is arranged on the fixture frame, and the guide post extends into the guide sleeve to enable the upper fork fixture to be connected with the fixture frame in a sliding mode.

Furthermore, the clamp also comprises a spring arranged in the guide sleeve, and two ends of the spring are abutted between the guide sleeve and the guide post.

Furthermore, the clamp frame is of a split structure and comprises an upper frame and a lower frame, the upper frame is connected with the upper fork clamp, and the lower frame is connected with the lower fork clamp;

one end of the upper frame is rotatably connected with one end of the lower frame, and the other end of the upper frame and the other end of the lower frame are locked and unlocked through the locking fastener.

Further, the clamp comprises a base, wherein the clamp frame and the base are obliquely or vertically arranged;

at least one fixture installation groove is formed in the base, the fixture installation groove is inclined or vertically arranged relative to the top surface of the base, and the bottom of the fixture frame is inserted into the fixture installation groove.

Furthermore, the fixture frame is fixed with the reference column, the base is provided with a guide hole matched with the reference column, and the fixture frame and the base are positioned through the reference column and the guide hole.

Further, the clamp frame is detachably connected with the base.

The invention can obtain the following technical effects:

by adjusting the diamond-shaped area, the invention can adapt to the large diameter range of the circular connector, and the minimum adaptation diameter can reach 0; by mounting the clamp on the base, the angle of the clamp facing an assembler can be adjusted, so that the assembler can select the most comfortable operation angle, and the production efficiency is improved; the invention adopts quick-release design at multiple places, and the assembly preparation time is short.

Drawings

FIG. 1 is a schematic structural view of a fixture without a base according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a fixture with a base according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of an upper fork clamp according to an embodiment of the present invention;

FIG. 4 is a schematic view of an assembly structure of an upper V-shaped claw and an upper frame according to an embodiment of the present invention;

FIG. 5 is a schematic perspective view of a base according to an embodiment of the present invention;

FIG. 6 is a cross-sectional structural view of a base in accordance with an embodiment of the present invention;

FIG. 7 is a schematic perspective view of a frame of a fixture according to an embodiment of the present invention;

fig. 8 is a schematic structural view of an operating state of the jig according to the embodiment of the present invention.

Reference numerals:

the clamp comprises a clamp frame 1, a guide sleeve 11, a locking piece 12, a positioning column 13, an upper fork clamp 2, an upper V-shaped claw 20, a guide column 21, a first clamping surface 201, a second clamping surface 202, a first single claw 203, a second single claw 204, a lower fork clamp 3, a lower V-shaped claw 30, a third clamping surface 301, a fourth clamping surface 302, a third single claw 303, a fourth single claw 304, a base 4, a clamp installation groove 41, a guide hole 42, a workpiece 6 and a spring 7.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention.

Fig. 1 shows a structure of a clamp without a base for clamping a circular workpiece, as shown in fig. 1, comprising a clamp frame 1, an upper fork clamp 2 and a lower fork clamp 3; the clamp frame 1 is of a frame structure and surrounds an upper fork clamp 2 and a lower fork clamp 3, and the upper fork clamp 2 and the lower fork clamp 3 are oppositely arranged along the length direction of the clamp frame 1; one end of the upper fork clamp 2 is arranged above the clamp frame 1, and the other end of the upper fork clamp 2 is fixed with an upper V-shaped claw 20; one end of the lower fork clamp 3 is arranged below the clamp frame 1, and the other end of the lower fork clamp 3 is fixed with a lower V-shaped claw 30; the upper V-shaped claw 20 and the lower V-shaped claw 30 are oppositely arranged to form a rhombic area of a cylindrical surface for clamping the workpiece 6; the diamond-shaped area is formed by sequentially surrounding four planes facing the workpiece 6, and the size of the diamond-shaped area can be adjusted.

In the prior art, the size of the diamond-shaped area is fixed, but the diamond-shaped area of the invention can be adjusted, so that the aim of clamping workpieces with more diameters is fulfilled.

Specifically, at least one of the upper fork clamp 2 and the lower fork clamp 3 is elastically connected with the clamp frame 1, so that the distance between the upper V-shaped claw 20 and the lower V-shaped claw 30 can be adjusted, and one of the upper V-shaped claw and the lower V-shaped claw which is elastically connected with the clamp frame 1 can move up and down, thereby changing the size of the rhombic area. Hereinafter, the following description will be given by taking an example in which one end of the upper fork clamp 2 is elastically connected to the clamp frame 1 and one end of the lower fork clamp 3 is fixedly connected to the clamp frame 1.

Specifically, the clamp frame 1 has two structures, namely an integrated structure and a split structure. The split structure is optimized, and the diameter range of the adaptive workpiece is wider.

Wherein, to the anchor clamps frame 1 of integrative structure, wholly be the frame structure of rectangle, go up fork anchor clamps 2 and fork anchor clamps 3 down and install respectively on one of them pair of relative frame.

The fixture frame 1 of the split structure includes an upper frame and a lower frame, as shown in fig. 7, the upper frame is provided with an upper fork fixture 2, and the lower frame is provided with a lower fork fixture 3. The upper frame and the lower frame comprise 3 frames, a transverse frame and two vertical frames, and the two vertical frames are vertically and fixedly connected with the two ends of the transverse frame. The middle of a pair of long frames of the jig frame 1 having an integral structure may be divided, and the upper fork jig 2 or the lower fork jig 3 may be attached to a pair of short frames of the jig frame 1. The transverse frame is used for integrally mounting the upper fork clamp 2 or the lower fork clamp 3. One end of the upper frame is rotatably connected with one end of the lower frame, and the other end of the upper frame and the other end of the lower frame are locked and unlocked through the locking fastener 12. The upper frame and the lower frame have the main function that when the diameter size of the workpiece is larger, the two frames can rotate relatively, so that the two frames can be separated. Through unblock hasp piece 12, go up the frame and rotate and go up fork anchor clamps 2 and keep away from lower fork anchor clamps 3, can separate fork anchor clamps 2 and lower fork anchor clamps 3 to place the work piece on lower fork anchor clamps 3. Then the locking fastener 12 is locked, the upper frame rotates and returns to the state of being connected with the lower frame end to end, and the closed-loop clamp frame 1 is formed.

More specifically, go up the frame and be connected through the pivot of lower frame one side with the lower frame, go up the frame and can overturn to the side during the use, the opposite side of lower frame has this kind of hasp piece 12 of fixed buckle, goes up the frame and can carry out quick locking and unblock through the locking screw who uses with bayonet socket cooperation. The upper frame is provided with a guide sleeve 11 for mounting the upper fork clamp 2.

Specifically, the structure of the upper V-clamp shown in fig. 3 includes a guide post 21 and an upper V-shaped claw 20, both of which are Y-shaped as a whole. One end of the guide post 21 is mounted on the jig frame 1, and the other end thereof is mounted with the upper V-shaped claw 20. The corresponding position of anchor clamps frame 1 is equipped with one end open-ended, hollow guide sleeve 11, and guide post 21 stretches into guide sleeve 11, makes and to fork anchor clamps 2 and 1 sliding connection of anchor clamps frame, and it is more steady with anchor clamps motion to be convenient for like this to fork anchor clamps 2.

As shown in fig. 4, the spring 7 is placed in the guide sleeve 11, and both ends of the spring 7 abut between the guide sleeve 11 and the guide post 21. More specifically, the guide post 21 may be axially provided with a blind hole having a circular cross section, so that one end of the spring 7 extends into the blind hole, and the other end of the spring 7 may extend into the guide sleeve 11. The spring 7 enables the clamp frame 1 and the upper V-shaped clamp 2 to be elastically connected, the upper V-shaped clamp 2 drives the upper V-shaped claw 20 to move up and down, and the distance between the upper V-shaped claw 20 and the lower V-shaped claw 30 can be changed, so that the size of a rhombic area is changed. Also, for a small-sized diameter, it is possible to directly put the upper fork 2 and the lower fork 3 using the spring 7 without separating them as a separate structure.

There are two structures for the upper V-shaped jaw 20, one is a first clamping surface 201 and a second clamping surface 202 (not shown) which are symmetrically arranged, and the other is a first clamping surface 201 and a second clamping surface 202 which are crosswise arranged. Preferably a first clamping surface 201 and a second clamping surface 202 arranged crosswise as shown in fig. 8, the clamp being compact and simple.

For the symmetrically arranged first 201 and second 202 clamping surfaces, the first 201 and second 202 clamping surfaces together form a V-shaped clamping surface. More specifically, the upper V-shaped jaw 20 comprises two single strip-shaped jaws symmetrically arranged on either side of the guide post 21, each of which provides a respective one of the clamping surfaces. The roots of the first clamping surface 201 and the second clamping surface 202 meet at the guide post 21, and the two clamping surfaces are symmetrically arranged about the guide post 21, and are inclined downward toward the lower V-shaped claw 30, and inclined toward both sides of the guide post 21 in the width direction of the jig frame 1.

Correspondingly, the structure of the lower V-shaped clamp 3 is similar to that of the upper V-shaped clamp 2, the lower V-shaped clamp 3 also comprises a guide column and a lower V-shaped claw 30, and the whole lower V-shaped clamp 3 is Y-shaped; the lower V-shaped jaw 30 comprises two single jaws symmetrically arranged on either side of the guide post, each providing a respective one of the clamping surfaces. The difference is that: one end of the guide post is fixedly arranged on the clamp frame 1; the length of the single jaw of the lower V-shaped clamp 3 is smaller than that of the single jaw of the upper V-shaped clamp 2. Preferably, a through hole is formed in a single claw of the upper V-shaped clamp 2, and one end, not the root, of the single claw of the lower V-shaped clamp 3 penetrates through the through hole. The through hole provides a moving space for the single jaw of the lower V-clamp 3, so that the first clamping surface 201 and the fourth clamping surface 302 can be arranged crosswise in the same plane, and the second clamping surface 202 and the third clamping surface 301 can be arranged crosswise in the same plane. Because the lower V-shaped claw 30 and the upper V-shaped claw 20 move relatively, the movement interference is avoided by means of forming through holes or slotted holes and the like when the lower V-shaped claw and the upper V-shaped claw are close to each other, and the method is a common mechanical technical means and is not described in detail herein. Thus, when the upper V-clamp 2 moves downwards towards the lower V-clamp 3, the first clamping surface 201 and the second clamping surface 202 form a V-profile, and the third clamping surface 301 and the fourth clamping surface 302 also form a V-profile. The first clamping surface 201, the second clamping surface 202, the third clamping surface 301 and the fourth clamping surface 302 sequentially enclose a diamond-shaped area, and a round workpiece 6 can be placed in the diamond-shaped area. Under the action of the spring 7, the upper V-shaped surface and the lower V-shaped surface clamp the workpiece 6, and meanwhile, the number of contact points of the clamp and the cylindrical surface of the workpiece 6 is 4, and the contact points are all on the same axial section of the workpiece 6.

For the crossed arrangement of the first clamping surface 201 and the second clamping surface 202, as shown in fig. 1 and 8, the upper V-shaped jaw 20 comprises a first single jaw 203 and a second single jaw 204, and the lower V-shaped jaw 30 comprises a third single jaw 303 and a fourth single jaw 304; the first single claw 203 and the second single claw 204 are arranged in a staggered mode, and the third single claw 303 and the fourth single claw 304 are arranged in a staggered mode; the first single jaw 203 and the fourth single jaw 304 are arranged crosswise; the second single claw 204 and the third single claw 303 are arranged crosswise. The first single jaw 203 and the third single jaw 303 are distributed on the same side of the second single jaw 204 along the length direction of the workpiece; the first single jaw 203 and the third single jaw 303 are distributed on the same side of the fourth single jaw 304.

More specifically, the first single jaw 203 and the second single jaw 204 provide a first clamping surface 201 and a second clamping surface 202, respectively, and the third single jaw 303 and the fourth single jaw 304 provide a third clamping surface 301 and a fourth clamping surface 302, respectively.

The first clamping surface 201 and the second clamping surface 202 are distributed on both sides of the guide post 21, and both face the workpiece, and form a V-shaped clamping surface as a whole. But each clamping surface is located at a different position in the axial direction of the workpiece 6. Correspondingly, the lower V-clamp 3 is similar in structure to the upper V-clamp 2, and includes a guide post and a lower V-shaped jaw 30, and the lower V-clamp 3 is generally Y-shaped. More specifically, in the axial direction of the workpiece 6, the upper V-shaped jaw 20 sequentially includes a first clamping surface 201 and a second clamping surface 202, and the lower V-shaped jaw 30 sequentially includes a third clamping surface 301 and a fourth clamping surface 302. The first clamping surface 201 and the third clamping surface 301 are arranged in parallel and opposite, and the second clamping surface 202 and the fourth clamping surface 302 are arranged in parallel and opposite. The four first clamping surfaces 201, the second clamping surfaces 202, the third clamping surfaces 301 and the fourth clamping surfaces 302 which are equal in length sequentially enclose a rhombic area. The first clamping face 201 and the third clamping face 301 clamp a first circumferential region of the workpiece 6, and root portions of the first clamping face 201 and the second clamping face 202 are arranged crosswise; the third clamping surface 301 and the fourth clamping surface 302 clamp a second circumferential region of the workpiece 6, and the roots of the third clamping surface 301 and the fourth clamping surface 302 are arranged crosswise; the first circumferential region and the second circumferential region are arranged in this order in the axial direction of the workpiece 6. Under the action of the spring 7, the upper V-shaped surface and the lower V-shaped surface clamp the workpiece 6, and meanwhile, the number of contact points of the clamp and the cylindrical surface of the workpiece 6 is 4, and the contact points are arranged on the sections of the workpiece 6 at two different positions in the axial direction.

The fork openings of the upper V-shaped claws 20 are staggered up and down. The fork openings of the lower V-shaped claws 30 are arranged at the lower part of the frame, and the fork openings are staggered up and down similarly to the fork openings of the upper V-shaped clamp 2, but the directions are opposite, and the lower V-shaped claws can be used in staggered nesting with the upper V-shaped claws 20 of the upper Y-shaped fork structure. Preferably, the lower V-shaped jaw 30 is obtained by turning the upper V-shaped jaw 20 180 ° in the plane of the frame 1 of the jig. The upper V-shaped jaw 20 and the lower V-shaped jaw 30 cooperate to form a movable diamond-like jaw for gripping a circular connector.

Preferably, as shown in fig. 2, the fixture further includes a base 4, the fixture frame 1 and the base 4 are arranged in an inclined manner, the base 4 is provided with a plurality of fixture installation grooves 41, the bottom of the fixture frame 1 is alternatively inserted into the fixture installation grooves 41, and the plurality of fixture installation grooves 41 have different cross-sectional shapes so as to adapt to different inclination angles of the fixture frame 1 and the base 4.

The bottom of anchor clamps frame 1 is fixed with reference column 13, and base 4 is seted up with reference column 13 complex guiding hole 42, and anchor clamps frame 1 and base 4 realize fixing a position through reference column 13 and guiding hole 42. The clamp frame 1 and the base 4 are detachably connected through common mechanical means such as screws.

As shown in fig. 5-6, the top surface of the base has fixture mounting grooves 41 with different cross-sectional shapes (other angles may be set as required) at different angles such as 90 °, 60 °, 45 °, etc. for mounting the fixture frame 1 on the base 4. The inside of anchor clamps mounting groove 41 is equipped with guiding hole 42, the bottom protrusion of anchor clamps frame 1 has reference column 13. Through the cooperation of guiding hole 42 and reference column 13, can realize the quick location of anchor clamps frame 1 and base 4 to anchor clamps frame 1 is installed in the sectional shape and its shape assorted anchor clamps mounting groove 41. The side of the base 4 is provided with screw locking holes, so that the clamp frame 1 can be detachably connected to the base 4 through screws. The lower part of the base 4 is provided with a locking structure similar to a bench clamp for clamping the base to a table top and the like. The base 4 has a cross-sectional shape of a horizontally disposed U-shape forming an opening for facilitating clamping of the table top into the opening. And then a bolt is arranged on the bottom surface of the base 4 in a penetrating way, and the desktop is fixed with the base 4 by screwing the bolt to the end part of the bolt to be fixed with the bottom of the desktop. For a part, reference may be made to prior art structures such as bench clamps or vises, which are not described in detail herein.

When the clamp is used, the clamp frame 1 is firstly unfolded, as shown in fig. 7, the circular connector to be assembled is placed into the jaw of the lower fork clamp 3, the upper part of the clamp frame 1 is closed by force, and at the moment, the spring 7 on the upper part of the upper fork clamp 2 is compressed by force to extrude the circular connector. The upper V-shaped claw 20 and the lower V-shaped claw 30 together form a diamond-shaped jaw to fix the circular connector, and then the locking screw is used for locking the buckle of the clamp frame.

The base 4 is clamped with the edge of the table top or the workbench through common locking structures such as bolts at the lower part, and can also be fixed in other forms. Select the angle installation anchor clamps mounting groove 41 that is fit for the operation, will be fixed wait to assemble on the assembly of circular connector and anchor clamps frame is installed base 4, can realize the quick accurate installation of anchor clamps through guide post 13 of the lower part of anchor clamps frame 1, after the installation is accomplished, use the screw to lock anchor clamps fast through the locking screw of base both sides.

After the assembly is completed, the locking screw can be unlocked to quickly open the buckle on the frame of the clamp to take down the circular connector, and the next step of work is carried out, so that the circular connector can be quickly prepared for assembly.

When the traditional circular arc-shaped or diamond-shaped jaw clamp is assembled, the fixed jaw of the traditional circular arc-shaped or diamond-shaped jaw clamp has a minimum adaptive diameter, if the diameter of a circular connector is smaller than the minimum adaptive diameter, the traditional circular arc-shaped or diamond-shaped jaw clamp cannot be clamped, and fillers are required to be used for filling. The present invention can operate as shown in fig. 8 when a small diameter connector is assembled, where the upper V-shaped jaw 20 and the lower V-shaped jaw 30 can be nested into each other with a minimum fitting diameter as low as 0. Realize the stable clamping operation to small diameter circular connector.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be taken as limiting the invention. Variations, modifications, substitutions and alterations of the above-described embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.

The above embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The clamp is used for clamping a circular workpiece and is characterized by comprising a clamp frame, an upper fork clamp and a lower fork clamp;

the upper V-shaped claw and the lower V-shaped claw are oppositely arranged and used for forming a rhombic area for clamping the cylindrical surface of the workpiece;

at least one of the upper fork clamp and the lower fork clamp is elastically connected with the clamp frame, so that the distance between the upper V-shaped claw and the lower V-shaped claw can be adjusted, and the size of the rhombic area can be changed.

2. The clamp of claim 1, wherein the upper V-shaped jaw comprises a first single jaw and a second single jaw, and the lower V-shaped jaw comprises a third single jaw and a fourth single jaw;

the first single claw and the second single claw are arranged in a staggered mode, and the third single claw and the fourth single claw are arranged in a staggered mode;

the first single claw and the fourth single claw are arranged crosswise;

the second single claw and the third single claw are arranged crosswise.

3. The clamp of claim 1, wherein one end of said upper fork clamp is resiliently connected to said clamp rim;

one end of the lower fork clamp is fixedly connected with the clamp frame.

4. The clamp of claim 3, wherein a guide post is fixed at one end of the upper fork clamp, a guide sleeve is arranged on the clamp frame, and the guide post extends into the guide sleeve to enable the upper fork clamp to be slidably connected with the clamp frame.

5. The clamp of claim 4, further comprising a spring disposed within the guide sleeve, wherein both ends of the spring abut between the guide sleeve and the guide post.

6. The clamp according to claim 1 or 5, wherein the clamp frame is a split structure, the clamp frame comprises an upper frame and a lower frame, the upper frame is connected with the upper fork clamp, and the lower frame is connected with the lower fork clamp;

7. The clamp of claim 1, further comprising a base, wherein the clamp bezel and the base are arranged obliquely or vertically;

the fixture comprises a base and is characterized in that at least one fixture mounting groove is formed in the base, and the fixture mounting groove is inclined or vertically arranged relative to the top surface of the base, so that the bottom of a fixture frame is inserted into the fixture mounting groove.

8. The fixture according to claim 7, wherein the fixture frame is fixed with positioning posts, the base is provided with guiding holes matched with the positioning posts, and the fixture frame and the base are positioned through the positioning posts and the guiding holes.

9. The clamp of claim 8, wherein the clamp bezel is removably connected to the base.