CN215200388U - Special fixture for two welding pieces of lower beam of automobile rear floor - Google Patents

Abstract

The utility model provides a two seam piece special fixture of floor bottom end rail behind car, relate to the technical field of the clamp, in order to solve and not to install bearing structure and freely flexible constructional device in original anchor clamps, lead to can't avoid anchor clamps to be extruded by the too heavy structure of floor bottom end rail behind the car now and take place the phenomenon of structural deviation, scattered to take place, reduced the installation firmness of anchor clamps, still be inconvenient for anchor clamps to carry out the welding operation to the floor bottom end rail behind the car of various model sizes, not only reduced the use flexibility of anchor clamps, the problem of the practicality of welding anchor clamps has further been reduced simultaneously, including the cross slot pole; the transverse groove rod is of an irregular strip-shaped structure, and two hollow elliptical outer sliding grooves are formed in the end face of the outer side of the transverse groove rod. The utility model discloses in because the supporting shoe is special unsmooth cuboid form structure, consequently the special construction of the convex square piece of supporting shoe can accord with the mounted position of fly leaf more.

Description

Special fixture for two welding pieces of lower beam of automobile rear floor

Technical Field

The utility model relates to an anchor clamps technical field, more specifically say, in particular to two seam spare special fixture of floor bottom end rail behind car.

Background

Welding jig is for guaranteeing weldment size, improves assembly precision and efficiency, prevents to connect the anchor clamps that warp the adoption, and two seam spare special fixture on one of them car back floor bottom end rail are used for the instrument that uses when welding car back floor bottom end rail, so anchor clamps play important role in whole welding procedure, and in welding process, reasonable anchor clamps structure not only can increase the diversified service function of anchor clamps, still further increase welding jig's practicality simultaneously.

For example, the patent number is CN208627853U, the utility model discloses a two seam piece special fixture of floor bottom end rail behind car, comprising a base plate, the bottom plate upper end is provided with the pivoted carousel, be provided with the supporting shoe that supports axle type part on the carousel, the supporting shoe upper end forms the support groove, the bottom plate upper end still is provided with detects the cover, it can be with the ejecting opening of axle type part to form in the cover to detect, it is provided with the removal piece that accepts ejecting back axle type part and send axle type part rotation to the collection box in to detect the cover outside. The utility model discloses an axle type part on the rotation drive supporting shoe is detecting the cover internal rotation to can detect whether overlength of its axial length, can be ejecting along the opening with not overlength axle type part to removing on the transport piece through ejecting cylinder, whether up to standard through weighing transducer detection axle type part weight, then send axle type part to the collection box through push cylinder, the utility model discloses convenient to use easily promotes.

When two seam piece special fixture on floor bottom end rail behind car used, because do not have installation bearing structure and the flexible constructional device of freedom in original anchor clamps, the bearing structure that leads to anchor clamps is not conform to the mounted position of fly leaf, reduce the installation tightness of anchor clamps simultaneously, the too heavy structure extrusion of floor bottom end rail takes place the structure skew behind the car now can't avoid anchor clamps, scattered phenomenon takes place, anchor clamps of still being not convenient for carry out welding operation to the floor bottom end rail behind the car of various model sizes, greatly reduced the operable welding range of anchor clamps, the use flexibility of anchor clamps has more been reduced, the while further practicality that has reduced welding jig.

Therefore, in view of the above, research and improvement are made for the existing structure and defects, and a special clamp for a two-welded part of a cross beam under a rear floor of an automobile is provided, so as to achieve the purpose of higher practical value.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a two seam piece special fixture of floor bottom end rail behind car to solve and do not have installation bearing structure and the flexible constructional device of freedom in original anchor clamps, lead to the too heavy structure extrusion of floor bottom end rail behind the car and take place the structure skew now can't avoid anchor clamps, scattered phenomenon takes place, the installation tightness of anchor clamps has been reduced, still be not convenient for anchor clamps carry out welding operation to the floor bottom end rail behind the car of various model sizes, the use flexibility of anchor clamps has not only been reduced, the further problem that reduces welding jig's practicality simultaneously.

The purpose and the efficiency of the special fixture for the second welding piece of the lower beam of the automobile rear floor are achieved by the following specific technical means:

a special clamp for a secondary welding piece of a lower cross beam of a rear floor of an automobile comprises a cross groove rod;

the transverse groove rod is of an irregular strip-shaped structure, and two hollow elliptical outer sliding grooves are formed in the end face of the outer side of the transverse groove rod; the outer side ends of the outer sliding chutes are respectively correspondingly provided with convex ellipsoidal rings, and the hollow inner sides of the outer sliding chutes are respectively provided with adjusting rods which are in a cylindrical shape and a spherical shape and are mutually crossed to form a similar L-shaped structure in a penetrating and connecting way;

the inner connecting grooves are of hollow elliptical structures and are respectively arranged on the inner side end faces of the two positions of the transverse groove rods;

and the positioning holes are vertically arranged on the top end surface of the upper side of the transverse groove rod respectively.

Further, the adjusting rod comprises a rod body,

the double-buckle slot is of an L-shaped long-strip hollow structure, a group of circular hollowed holes are formed in the double-buckle slot respectively, and the adjusting rods are vertically arranged in the circular hollowed holes of the double-buckle slot in a penetrating mode respectively;

the transverse clamping strips are respectively and transversely inserted and installed on the middle inner sides of the double buckle grooves;

the buckle, the buckle is rectangular shaped plate, and on the upside terminal surface of buckle respectively vertical protrusion installation a set of stand, and buckle slidable mounting is in the hollow inboard of inner connection groove, and the buckle protrusion stand of rear end is run through by the screw respectively and is installed in the hollow inboard of locating hole, and the buckle protrusion stand of front end is connected respectively and is installed a set of connecting plate and a set of fly leaf.

Further, the movable plate comprises a movable plate,

the square grooves are respectively formed in the right end face of the movable plate, and supporting blocks are respectively fixedly mounted on the hollow inner sides of the square grooves;

the concave holes are formed in the end face of the right side of the movable plate and are respectively located at the front end and the rear end of the square groove;

a set of universal wheel of downside bottom fixed mounting of horizontal groove pole, connecting plate and fly leaf are oval long plate structure, and the connecting plate is connected respectively and alternates in the hollow inboard of fly leaf, and fly leaf and connecting plate constitute fork structure each other, and the moving mechanism that connecting plate and fly leaf alternately constitute is connected the installation by a pair of horizontal groove pole mutual correspondence, and connecting plate fixed mounting on the round hole position of seting up the locating hole, and the fly leaf slides repeatedly in the hollow inboard of inner connection groove.

Further, the support block may include,

the spiral bottom is of a disc-shaped hollow structure, and the inner sides of the hollow structure of the spiral bottom are respectively provided with a thread groove;

the sleeve is vertically connected and installed at the upper end in the middle of the supporting block;

the lifting rod vertically penetrates through the hollow inner side of the sleeve;

the top surface rod is of a hollow semi-circular structure, the top surface rod is vertically and fixedly arranged at the middle upper end of the lifting rod, the lifting rod and the top surface rod are of a fixedly arranged integrated structure, and the lifting rod and the top surface rod move up and down repeatedly in the hollow inner side of the sleeve;

the supporting shoe, the supporting shoe is irregular cuboid structure, and set up the position department that corresponds the shrinkage pool respectively on the convex square piece of the outer terminal surface mounting of both sides around the supporting shoe and unify and set up circular fretwork hole, and the screw is with shrinkage pool and the vertical run-through of fretwork hole, connect the supporting shoe and install the hollow inboard at square groove, and the spiral bottom connection is installed in the downside bottom of fly leaf, sleeve, lifter and top surface pole fixed mounting are at the upside top of fly leaf.

Compared with the prior art, the utility model discloses following beneficial effect has:

the supporting block is of a special concave-convex cuboid structure, so that the special structure of the square block protruding from the supporting block can better conform to the installation position of the movable plate, the installation firmness of the supporting block is increased, the lower end of the supporting block is matched with the practical application of the clamp, the special shape of the supporting block is added with the disc spiral bottom with a thread in the installation, and the disc spiral bottom with the thread in the disc spiral bottom can be rotated and screwed on the hollow inner side, so that a vertical supporting structure is realized, the phenomenon that the clamp is extruded by a too heavy structure of a lower beam of a floor of an automobile to cause structural deviation and scattering is effectively avoided, the function maximization of the clamp is further realized, and the practicability of the clamp is greatly improved;

because the transverse groove rod is used for positioning at two ends, and the method for flexibly adjusting the intercrossing telescopic structure integrating the connecting plate and the movable plate is adopted, the connecting plate and the movable plate can be connected and matched with each other to use the clamp to weld the automobile rear floor lower cross beams with various model sizes, the operable welding range of the clamp is greatly increased, the intercrossing telescopic movable structure is adopted, the use flexibility of the clamp is increased, the diversified use functions of the clamp are increased, the structural rationality of the clamp is improved simultaneously, and the practicability of the welding clamp is further improved.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic diagram of the right front upper axial view structure of the present invention.

Fig. 2 is a schematic diagram of the right front lower axial view structure of the present invention.

Fig. 3 is a schematic illustration of the cross bar section and the adjustment bar section of the present invention in a disassembled state.

Fig. 4 is an axial view of the connecting plate and the movable plate of the present invention.

Fig. 5 is an axial view of the supporting block of the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. a cross slot bar; 101. an outer chute; 102. an inner connecting groove; 103. positioning holes; 2. adjusting a rod; 201. double buckle grooves; 202. a transverse holding strip; 203. buckling; 3. a connecting plate; 4. a movable plate; 401. a square groove; 402. concave holes; 5. a support block; 501. a spiral bottom; 502. a sleeve; 503. a lifting rod; 504. a top surface bar.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through a central medium. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in figures 1 to 5:

the utility model provides a special clamp for a lower beam two-welding piece of an automobile rear floor, which comprises a transverse groove rod 1;

the transverse groove rod 1 is of an irregular strip-shaped structure, and two hollow elliptical outer sliding grooves 101 are respectively formed in the end face of the outer side of the transverse groove rod 1; the outer side ends of the outer chutes 101 are respectively correspondingly provided with convex ellipsoidal rings, and the hollow inner sides of the outer chutes 101 are respectively provided with adjusting rods 2 which are in a cylindrical shape and a spherical shape and are mutually crossed to form a similar L-shaped structure in a penetrating and connecting manner;

the inner connecting slot 102, the inner connecting slot 102 is a hollow elliptical structure, and the inner connecting slot 102 is respectively arranged on the inner side end faces of two positions of the transverse slot rod 1;

locating hole 103, locating hole 103 vertical arrangement respectively is seted up on the upside top end face of horizontal groove pole 1, horizontal groove pole 1 is the fixed main location structure that supports of anchor clamps, the outer spout 101 of two hollow spout that sets up inside and outside and interior connecting plate 3 and fly leaf 4 of the installation later stage of being convenient for of inner connecting groove 102, connecting plate 3 and fly leaf 4 interconnect use be convenient for anchor clamps to carry out welding operation to various model size's automobile rear floor bottom end rail, not only increase the diversified service function of anchor clamps, the while also more perfect the structural rationality of anchor clamps.

Wherein, the adjusting rod 2 comprises a rod body,

the double buckle grooves 201 are L-shaped long-strip hollow structures, a group of circular hollowed holes are respectively formed in the double buckle grooves 201, and the adjusting rods 2 are respectively vertically installed in the circular hollowed holes of the double buckle grooves 201 in a penetrating mode;

the transverse clamping strips 202 are respectively and transversely arranged on the middle inner side of the double-buckle slot 201 in a penetrating manner;

buckle 203, buckle 203 is the rectangular plate, and a set of stand is installed to vertical protrusion respectively on the upside terminal surface of buckle 203, and buckle 203 slidable mounting is in the hollow inboard of interconnection groove 102, buckle 203 protrusion stand at rear end is run through the hollow inboard of installing at locating hole 103 by the screw respectively, buckle 203 protrusion stand at the front end is connected respectively and is installed a set of connecting plate 3 and a set of fly leaf 4, adjust the double-thread groove 201 and the horizontal holding strip 202 mutually perpendicular's of installation on the pole 2, can increase the clamping effort of anchor clamps to floor bottom end rail behind the car, and set up out more circular shape fretwork holes on the medial surface of double-thread groove 201 respectively, be convenient for freely adjust pole 2 and horizontal holding strip 202, strengthen the use convenience of anchor clamps, further improve the practicality of anchor clamps.

Wherein the movable plate 4 comprises, in combination,

the square grooves 401 are respectively formed in the right end face of the movable plate 4, and the support blocks 5 are respectively fixedly mounted on the hollow inner sides of the square grooves 401;

concave holes 402, the concave holes 402 are arranged on the right end face of the movable plate 4, and the concave holes 402 are respectively positioned on the front end and the rear end of the square groove 401;

a set of universal wheel of downside bottom fixed mounting of horizontal groove pole 1, connecting plate 3 and fly leaf 4 are oval long plate structure, and connecting plate 3 connects respectively and alternates in the hollow inboard of fly leaf 4, fly leaf 4 and connecting plate 3 constitute the fork structure each other, and the moving mechanism of connecting plate 3 and fly leaf 4 alternately constitution, connect the installation by a pair of horizontal groove pole 1 mutual correspondence, and connecting plate 3 fixed mounting is on the round hole position of seting up locating hole 103, fly leaf 4 slides repeatedly in the hollow inboard of inner connection groove 102, the installation of horizontal groove pole 1 makes connecting plate 3 and fly leaf 4 can freely stretch out and draw back according to actual car rear floor bottom end rail size, the structure that freely stretches out and draws back like this increases the use flexibility of anchor clamps, greatly increased welding jig's practicality.

Wherein the support block 5 comprises, in combination,

the spiral bottom 501 is a disc-shaped hollow structure, and the inner sides of the hollow structure of the spiral bottom 501 are respectively provided with a thread groove;

the sleeve 502 is vertically connected and installed at the upper middle end of the supporting block 5;

the lifting rod 503 is vertically arranged on the hollow inner side of the sleeve 502 in a penetrating manner;

the top surface rod 504 is of a hollow semi-circular structure, the top surface rod 504 is vertically and fixedly installed at the middle upper end of the lifting rod 503, the lifting rod 503 and the top surface rod 504 are of a fixedly installed integrated structure, and the lifting rod 503 and the top surface rod 504 repeatedly move up and down on the hollow inner side of the sleeve 502;

the supporting block 5 is of an irregular cuboid structure, convex square blocks are arranged on the outer end faces of the front side and the rear side of the supporting block 5 and correspond to the arrangement positions of the concave holes 402 respectively to form round hollowed holes in a unified mode, the concave holes 402 and the hollowed holes are vertically penetrated through by screws, the supporting block 5 is connected and installed on the hollow inner side of the square groove 401, the spiral bottom 501 is connected and installed at the bottom of the lower side of the movable plate 4, the sleeve 502, the lifting rod 503 and the top rod 504 are fixedly installed at the top of the upper side of the movable plate 4, the supporting block 5 fixedly installed inside the square groove 401 by the screws can increase the multi-angle supporting function of the clamp, the special concave-convex cuboid structure of the supporting block 5 can better accord with the installation position of the movable plate 4, the convex square blocks increase the installation firmness of the supporting block 5, the square blocks at the two ends are respectively provided with the hollowed holes and are correspondingly installed by the screws and the concave holes 402, greatly increased the structural stability of anchor clamps, and the lower extreme of supporting shoe 5 is for the practical application who cooperates anchor clamps more, add and establish at the bottom of the installation spiral 501 can deal with some heavier car rear floor bottom end rail's position, 501 can have screw thread form round bar at the bottom of the spiral and rotate to turn round in hollow inboard, realize the structure of a vertical support, the effectual anchor clamps of having avoided is by too heavy structure extrusion of car rear floor bottom end rail and take place the structure skew, scattered phenomenon takes place, thereby further realization anchor clamps's function maximize, simultaneously great improvement the practicality of anchor clamps.

The specific use mode and function of the embodiment are as follows:

in the using process, firstly, a group of universal wheels are fixedly installed at the bottom of the lower side of the transverse groove rod 1, the buckle 203 is slidably installed on the hollow inner side of the inner connecting groove 102, the convex upright post of the buckle 203 at the rear end is respectively installed on the hollow inner side of the positioning hole 103 in a penetrating mode through screws, the convex upright post of the buckle 203 at the front end is respectively connected and installed with a group of connecting plates 3 and a group of movable plates 4, the connecting plates 3 are fixedly installed on the positions of round holes formed in the positioning hole 103, the movable plates 4 repeatedly slide on the hollow inner side of the inner connecting groove 102, the connecting plates 3 and the movable plates 4 on the inner sides of the transverse groove rod 1 are connected and installed in a penetrating mode, the connecting plates 3 and the movable plates 4 are respectively connected and inserted on the hollow inner side of the movable plates 4, therefore, a group of cross-shaped telescopic mechanisms is formed, the connecting plates 3 and the movable plates 4 can be adjusted in a freely telescopic mode according to the actual size of the cross floor under the automobile, the universal wheels installed on the transverse groove rod 1 can synchronously follow the connecting plates 3 and the movable plates 4 to achieve flexible matching of a clamp The body size moves, and the supporting block 5 and the lifting rod 503 which are arranged on the movable plate 4 can be adjusted up and down, so that the required welding height during welding is provided, and the use convenience of the clamp is further improved.

In addition, the mutually perpendicular installation mode of the double buckle grooves 201 and the transverse clamping strips 202 arranged on the adjusting rods 2 which are slidably arranged on the outer end faces of the transverse groove rods 1 can increase the clamping acting force of the clamp on the automobile rear floor lower cross beam, the inner side end faces of the double buckle grooves 201 are respectively provided with a plurality of round hollowed-out holes, so that the adjusting rods 2 and the transverse clamping strips 202 can be freely adjusted, the mutually perpendicular installation mode of the double buckle grooves 201 and the transverse clamping strips 202 arranged on the adjusting rods 2 can increase the clamping acting force of the clamp on the automobile rear floor lower cross beam, the inner side end faces of the double buckle grooves 201 are respectively provided with a plurality of round hollowed-out holes, so that the adjusting rods 2 and the transverse clamping strips 202 can be freely adjusted, the use convenience of the clamp is enhanced, the transverse groove rods 1, the connecting plates 3 and the movable plates 4 are parallelly supported, the welding height adjustment is carried out by the supporting blocks 5, the installation of the adjusting rods 2 increases the diversified adjusting and clamping functions of the clamp, meanwhile, the structural rationality of the clamp is improved by matching a plurality of structures.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims (7)

1. A special clamp for a secondary welding piece of a lower cross beam of a rear floor of an automobile is characterized by comprising a cross groove rod (1);

the transverse groove rod (1) is of an irregular strip-shaped structure, and two hollow elliptical outer sliding grooves (101) are respectively formed in the end face of the outer side of the transverse groove rod (1); the outer side ends of the outer sliding chutes (101) are respectively and correspondingly provided with convex ellipsoidal rings, and the hollow inner sides of the outer sliding chutes (101) are respectively and penetratingly connected with adjusting rods (2) which are formed by mutually crossing cylinders and spheres and form a similar L-shaped structure;

the inner connecting groove (102), the inner connecting groove (102) is a hollow elliptical structure, and the inner connecting groove (102) is respectively arranged on the end faces of the inner sides of two positions of the transverse groove rod (1);

the positioning holes (103) are vertically arranged on the top end face of the upper side of the transverse groove rod (1) respectively.

2. The special fixture for the second welded part of the cross beam under the rear floor of the automobile as claimed in claim 1, wherein the adjusting rod (2) comprises,

the double-buckle groove (201), the double-buckle groove (201) is of an L-shaped long-strip hollow structure, a group of round hollowed holes are respectively formed in the double-buckle groove (201), and the adjusting rods (2) are respectively vertically arranged in the round hollowed holes of the double-buckle groove (201) in a penetrating mode;

the transverse clamping strips (202), the transverse clamping strips (202) are respectively and transversely arranged on the middle inner side of the double-buckle groove (201) in a penetrating manner;

buckle (203), buckle (203) are rectangular shaped plate, and on the upside terminal surface of buckle (203) respectively vertical protrusion installation a set of stand, and buckle (203) slidable mounting is in the hollow inboard of inner connection groove (102), and buckle (203) protrusion stand of rear end is run through by the screw respectively and is installed in the hollow inboard of locating hole (103), and buckle (203) protrusion stand of front end is connected respectively and is installed a set of connecting plate (3) and a set of fly leaf (4).

3. The special fixture for the second welded part of the automobile rear floor lower cross beam as claimed in claim 2, wherein the connecting plate (3) and the movable plate (4) are both in an oval long plate structure, the connecting plate (3) is respectively inserted into the hollow inner side of the movable plate (4), and the movable plate (4) and the connecting plate (3) form a cross structure.

4. The jig special for the second welded part of the cross member under the rear floor of the automobile as set forth in claim 3, wherein the movable plate (4) comprises,

the square grooves (401), the square grooves (401) are respectively arranged on the right end face of the movable plate (4), and the hollow inner sides of the square grooves (401) are respectively fixedly provided with supporting blocks (5);

the concave hole (402), the concave hole (402) is seted up on the right side end face of fly leaf (4), and the concave hole (402) is in the position at square groove (401) front and back both ends respectively.

5. The jig special for the second welded member of the cross member under the rear floor of an automobile according to claim 4, wherein the supporting block (5) comprises,

the spiral bottom (501) is of a disc-shaped hollow structure, and the inner sides of the hollow structures of the spiral bottom (501) are respectively provided with a thread groove;

the sleeve (502), the vertical connection of sleeve (502) is installed in the middle upper end of the supporting shoe (5);

the lifting rod (503), the lifting rod (503) vertically runs through and is installed on the hollow inner side of the sleeve (502);

top surface pole (504), top surface pole (504) are hollow semicircle structure, and the vertical fixed mounting of top surface pole (504) is in the upper end placed in the middle of lifter (503), and lifter (503) and top surface pole (504) be fixed mounting's an organic whole structure, and lifter (503) and top surface pole (504) up-and-down repetitive motion are in the hollow inboard of sleeve (502).

6. The clamp special for the second welded part of the automobile rear underfloor beam as claimed in claim 5, wherein the supporting block (5) has an irregular rectangular parallelepiped structure, the convex square blocks arranged on the outer end surfaces of the front and rear sides of the supporting block (5) are respectively provided with circular hollowed holes corresponding to the positions where the recessed holes (402) are formed, the recessed holes (402) and the hollowed holes vertically penetrate through the screw, the supporting block (5) is connected and arranged inside the hollow square groove (401), the spiral bottom (501) is connected and arranged at the bottom of the lower side of the movable plate (4), and the sleeve (502), the lifting rod (503) and the top rod (504) are fixedly arranged at the top of the upper side of the movable plate (4).

7. The special fixture for the two-welded piece of the automobile rear underfloor crossbeam according to claim 1, wherein a set of universal wheels is fixedly installed at the bottom of the lower side of the transverse groove rod (1), a movable mechanism formed by the intersection of the connecting plate (3) and the movable plate (4) is formed by the mutual corresponding connection and installation of the pair of transverse groove rods (1), the connecting plate (3) is fixedly installed at a position of a round hole provided with the positioning hole (103), and the movable plate (4) repeatedly slides on the hollow inner side of the inner connecting groove (102).

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