CN217135113U

CN217135113U - Bus duct installing support

Info

Publication number: CN217135113U
Application number: CN202220526287.1U
Authority: CN
Inventors: 王刚; 魏长军; 王璐
Original assignee: Shenyang Shengheng Electrical Equipment Co ltd
Current assignee: Shenyang Shengheng Electrical Equipment Co ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-08-05
Anticipated expiration: 2032-03-11

Abstract

The utility model provides a bus duct mounting bracket, which belongs to the technical field of bus duct construction, and comprises a support plate, wherein the lateral wall of the support plate is symmetrically and slidably connected with an outer plate, the left and right lateral walls of the support plate respectively penetrate through the lateral walls of the two outer plates and extend to an inner cavity, the front and back lateral walls of the outer plate are respectively and symmetrically provided with a sliding groove, when the bus duct is mounted, the outer plates are respectively slid to the two sides of the support plate according to the specification of the bus duct, then clamping bolts are clamped inside corresponding clamping grooves, thereby locking the positions of the outer plates, adjusting the positions of the outer plates according to the specification of the mounted bus duct, being suitable for the mounting of bus ducts with different specifications, having practicability, bringing convenience to the construction process of related personnel, then respectively rotating two threaded rods, adjusting the positions of mounting seats through supporting rods, then placing the bus duct on the surface of the support plate for mounting, the installation position can be adjusted during installation, and convenience is brought to the construction process of related personnel.

Description

Bus duct installing support

Technical Field

The utility model belongs to the technical field of the bus duct construction, concretely relates to bus duct installing support.

Background

The bus duct is a closed metal device formed by copper and aluminum bus posts, is used for distributing larger power for each element of a decentralized system, has replaced electric wires and cables increasingly in indoor low-voltage power transmission main line engineering projects, and along with the emergence of modern engineering facilities and equipment, the power consumption of each industry is increased rapidly, especially the appearance of numerous high-rise buildings and large-scale factory workshops, the traditional cable serving as a power transmission lead cannot meet the requirements in a large-current transmission system, and the parallel connection of multiple cables brings inconvenience to field installation, construction and connection. The plug-in type bus duct is produced as a novel distribution wire, compared with the traditional cable, the plug-in type bus duct fully embodies the superiority of the plug-in type bus duct when large current is transmitted, simultaneously, because of adopting a new technology and a new process, the contact resistance and the temperature rise of the connection part at the two ends of the bus duct and the plug-in part of the branching port are greatly reduced, and high-quality insulating materials are used in the bus duct, so that the safety and reliability of the bus duct are improved, the whole system is more perfect, and the bus duct installing support is provided for the convenience of installation of the bus duct.

SUMMERY OF THE UTILITY MODEL

In order to solve the bus duct installation scheduling problem that exists among the above-mentioned prior art, the utility model provides a bus duct installing support adopts adjustment mechanism to combine bus duct installation supporting mechanism to reach the effect of stably installing the bus duct. The specific technical scheme is as follows:

a bus duct mounting bracket comprises a supporting plate, wherein outer plates are symmetrically and slidably connected to the outer side wall of the supporting plate, the left side wall and the right side wall of the supporting plate respectively penetrate through the side walls of the two outer plates and extend to an inner cavity, rotating shafts are fixedly mounted on the side walls of the two outer plates, a first connecting seat is rotatably connected to the outer side wall of each rotating shaft and fixedly mounted on the side wall of a supporting rod, the side wall of the supporting rod is connected with a mounting seat, sliding grooves are symmetrically formed in the front side wall and the rear side wall of the outer plate respectively, sliding blocks are symmetrically and fixedly mounted on the left side wall and the right side wall of the supporting plate respectively and slidably connected to the inner side wall of the outer plate, one ends of sliding rods are fixedly mounted on the front side wall and the rear side wall of the sliding blocks respectively symmetrically, a limiting plate is fixedly mounted at the other end of the sliding rods, and a supporting seat is fixedly mounted on the lower side wall of the limiting plate, the inner chamber threaded connection of supporting seat has the joint bolt, slide bar sliding connection be in the inside wall of spout, limiting plate sliding connection be in the lateral wall of planking, the even draw-in groove of having seted up of lateral wall of planking, the draw-in groove with the joint bolt is corresponding, planking lateral wall fixed mounting has the connecting plate, the fixed mounting of the last lateral wall symmetry of connecting plate has the riser, two the relative lateral wall difference symmetrical rotation of riser is connected with the both ends of threaded rod, the lateral wall threaded connection of threaded rod has the sliding seat, the last lateral wall fixed mounting of sliding seat has the second connecting seat, the inner chamber of second connecting seat rotates the one end that is connected with the transfer line, the other end of transfer line rotates and is connected with the fixed axle, fixed axle fixed mounting be in the lateral wall of bracing piece.

Additionally, the utility model provides an among the above-mentioned technical scheme bus duct installing support can also have following additional technical characteristic:

in the above technical scheme, the lateral wall fixed mounting of bracing piece has the third connecting seat, the lateral wall of third connecting seat rotates and is connected with the fourth connecting seat, the fourth connecting seat fixed mounting be in the lateral wall of mount pad, the third connecting seat with the inner chamber of fourth connecting seat all is provided with adjusting bolt, adjusting bolt's lateral wall threaded connection has the nut.

The third connecting seat and the fourth connecting seat are elastic bodies.

The lateral wall fixed mounting of mount pad has the cushion, the cushion is the elastomer.

The outer side wall of the sliding rod is movably connected with a guide wheel, and the guide wheel is connected to the inner side wall of the outer plate in a sliding mode.

And an operating rod is fixedly arranged on the side wall of the threaded rod.

The two ends of the guide rod are respectively and symmetrically and fixedly installed on the opposite side walls of the two vertical plates, and the movable seat is connected to the outer side wall of the guide rod in a sliding mode.

The utility model discloses a bus duct installing support compares with prior art, and beneficial effect is:

firstly, when the bus duct is installed, the outer plates are respectively slid to two sides of the supporting plate according to the specification of the bus duct, then the clamping bolts are clamped inside the corresponding clamping grooves, so that the positions of the outer plates are locked, the positions of the outer plates are adjusted according to the specification of the installed bus duct, the bus duct can be suitable for installation of bus ducts with different specifications, the bus duct has practicability, and convenience is brought to the construction process of related personnel, in the process of sliding the outer plates on the outer surface of the supporting plate, the outer plates are attached to the outer side wall of the sliding block to slide, meanwhile, the sliding rod is attached to the inner side wall of the sliding groove to slide, so that the sliding rod drives the limiting plate to be attached to the surface of the outer plate to slide, the stability in the sliding process of the outer plates is improved through the limiting of the limiting plate, the relative positions of the clamping bolts and the clamping grooves cannot deviate, and the clamping operation process is more accurate, then rotate two threaded rods respectively, make the other end of transfer line drive articulated fixed axle and remove, make the fixed axle drive the bracing piece and remove, thereby make the bracing piece use the pivot to rotate as the center through first connecting seat, thereby adjust the position of bracing piece, adjust the position of mount pad through the bracing piece, then through passing mounting bolt inside mounting hole and fixing the mount pad in suitable position, then place the bus duct and install on the surface of backup pad, make and to adjust according to mounted position in the time of the installation, the work progress for relevant personnel brings the facility.

Two, when the position of adjusting the mount pad, take off the nut at adjusting bolt's surface, then rotate the fourth connecting seat at the surface of third connecting seat, rotate the mount pad through the fourth connecting seat to with the position that the installation face was laminated mutually on, then twist at adjusting bolt's surface and move the nut, lock the installation angle of mount pad through nut and adjusting bolt, make relevant personnel can install different positions, thereby bring the facility for relevant personnel's work progress.

And the guide wheel is movably sleeved on the outer surface of the sliding rod through the mounting hole in the center, so that when the outer plate slides on the outer surface of the supporting plate, the outer plate is attached to slide on the outer surface of the guide wheel, the stability of the adjusting process of the outer plate is improved, and the stability of the mounting process of the bus duct is further ensured.

Fourthly, when adjusting the sliding seat position through rotating the threaded rod, make the sliding seat slide along the surface of guide bar simultaneously, thereby prevent the sliding seat offset, guaranteed the stability that the sliding seat removed the process, and then guaranteed the stability of bracing piece accommodation process.

Drawings

Fig. 1 is a schematic structural view of a busway mounting bracket of the present invention;

fig. 2 is a sectional view of a bus duct mounting bracket of the present invention;

wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is: 1-support plate, 2-outer plate, 3-support rod, 4-third connecting seat, 5-fourth connecting seat, 6-slide rod, 7-transmission rod, 8-fixed shaft, 9-second connecting seat, 10-threaded rod, 11-operating rod, 12-guide rod, 13-movable seat, 14-vertical plate, 15-supporting seat, 16-clamping bolt, 17-sliding groove, 18-limiting plate, 19-connecting plate, 20-rotating shaft, 21-first connecting seat, 22-adjusting bolt, 23-mounting seat, 24-nut, 25-cushion block, 26-slide block, 27-guide wheel and 28-clamping groove.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The present invention will be further described with reference to the following embodiments and the attached fig. 1 and 2, but the present invention is not limited to these embodiments.

Example 1

A bus duct mounting bracket comprises a supporting plate 1, wherein outer plates 2 are symmetrically and slidably connected to the outer side wall of the supporting plate 1, the left side wall and the right side wall of the supporting plate 1 respectively penetrate through the side walls of the two outer plates 2 and extend to an inner cavity, the left side surface and the right side surface of the supporting plate 1 respectively slide in through holes on the surfaces of the two outer plates 2, rotating shafts 20 are fixedly mounted on the side walls of the two outer plates 2, the outer side wall of each rotating shaft 20 is rotatably connected with a first connecting seat 21, the first connecting seats 21 are fixedly mounted on the side wall of a supporting rod 3, rotating shafts 20 are fixedly mounted on the front side surface and the rear side surface of the two outer plates 2 at positions close to the edges, the first connecting seats 21 are fixedly mounted on the side surface of the supporting rod 3 close to the outer plates 2, mounting holes are formed in the inner cavities of the first connecting seats 21, so that the first connecting seats 21 are movably sleeved on the outer surfaces of the rotating shafts 20, the supporting rod 3 rotates around a rotating shaft 20 through a first connecting seat 21, the side wall of the supporting rod 3 is connected with a mounting seat 23, an inner cavity of the mounting seat 23 is provided with a mounting hole, a bolt penetrates through the mounting hole and then is fixed at a proper position, the front side wall and the rear side wall of the outer plate 2 are respectively symmetrically provided with sliding grooves 17, the left side wall and the right side wall of the supporting plate 1 are respectively symmetrically and fixedly provided with sliding blocks 26, the sliding blocks 26 are connected with the inner side wall of the outer plate 2 in a sliding manner, the side surface of the supporting plate 1 extending to the inside of the outer plate 2 is fixedly provided with the sliding blocks 26, the front side wall and the rear side wall of the sliding blocks 26 are respectively and fixedly provided with one ends of sliding rods 6, the other end of the sliding rods 6 is fixedly provided with a limiting plate 18, the lower side wall of the limiting plate 18 is fixedly provided with a supporting seat 15, the inner cavity of the supporting seat 15 is in threaded connection with a clamping bolt 16, and the sliding rods 6 are connected with the inner side wall of the sliding grooves 17 in a sliding manner, the limiting plate 18 is connected with the side wall of the outer plate 2 in a sliding way, sliding grooves 17 are respectively and symmetrically formed on the front side surface and the rear side surface of the outer plate 2, one end of a sliding rod 6 is respectively and symmetrically and fixedly installed on the front side surface and the rear side surface of a sliding block 26, the other end of the sliding rod 6 penetrates through the inner cavity of the sliding groove 17 to extend out of the outer part and is fixedly connected with the limiting plate 18, the limiting plate 18 is attached to the surface of the outer plate 2 to slide, the sliding rod 6 is attached to the inner side wall of the sliding groove 17 to slide, a supporting seat 15 with a clamping bolt 16 inside is fixedly installed on the lower surface of the limiting plate 18, clamping grooves 28 are uniformly formed on the side wall of the outer plate 2, the clamping grooves 28 correspond to the clamping bolt 16, a plurality of clamping grooves 28 are sequentially and uniformly formed on the front side surface and the rear side surface of the outer plate 2 and on the position corresponding to the clamping bolt 16, a connecting plate 19 is fixedly installed on the side wall of the outer plate 2, connecting plates 19 are symmetrically and fixedly installed on the upper side wall, the rotation that the relative lateral wall of two risers 14 is symmetrical respectively is connected with the both ends of threaded rod 10, two riser 14 vertically fixed mounting are at the upper surface of connecting plate 19, the embedding installation bearing of opposite face difference symmetry at two risers 14, the inside at two bearings is installed in the both ends embedding respectively of threaded rod 10, make threaded rod 10 rotate steadily between two risers 14, the lateral wall threaded connection of threaded rod 10 has free seat 13, the last lateral wall fixed mounting of free seat 13 has second connecting seat 9, the inner chamber of second connecting seat 9 rotates the one end that is connected with transfer line 7, the other end of transfer line 7 rotates and is connected with fixed axle 8, fixed axle 8 fixed mounting is at the lateral wall of bracing piece 3, the fixed mounting fixed axle 8 of bilateral surface difference symmetry around bracing piece 3, at the inner chamber fixed mounting axis of second connecting seat 9, the both ends of transfer line 7 are established the mounting hole movable sleeve through the mounting hole movable sleeve of seting up respectively and are established and are rotated the fixed axle 8 and the inside second connecting seat 9 respectively The outer surface of the shaft, make both ends of the drive link 7 articularly connect with bracing piece 3 and second connecting seat 9 separately, while installing the bus duct, drive the planking 2 to move to the appropriate position through the shoe plate 1, then slide the planking 2 to both sides of the shoe plate 1 separately according to the specification of the bus duct, make two planking 2 drive two bracing pieces 3 to move to both sides separately, adjust the area of the bus duct placing surface, after sliding two planking 2 to the appropriate length, aim at the card slot 28 on the correspondent position with the joint bolt 16, then rotate the joint bolt 16, joint the joint bolt 16 in the inside of the correspondent card slot 28, thus lock the position of the planking 2, adjust the position of the planking 2 according to the specification of the bus duct installed, can be suitable for the bus duct installation of different specifications, have practicability, and bring convenience to the construction process of the relevant personnel, in the process of sliding the outer plate 2 on the outer surface of the support plate 1, the outer plate 2 is attached to the outer side wall of the sliding block 26 to slide, meanwhile, the sliding rod 6 is attached to the inner side wall of the sliding groove 17 to slide, so that the sliding rod 6 drives the limiting plate 18 to be attached to the surface of the outer plate 2 to slide, the stability of the sliding process of the sliding rod 6 is improved through the limiting of the limiting plate 18, the stability of the sliding process of the outer plate 2 is improved, the position of the clamping bolt 16 relative to the clamping groove 28 cannot deviate, the clamping operation process is more accurate, then the two threaded rods 10 are respectively rotated, the movable seat 13 in threaded connection with the outer surface is moved in the horizontal direction through the rotated threaded rod 10, the second connecting seat 9 is moved along with the movable seat 13, one end of the hinged transmission rod 7 is driven to move through the second connecting seat 9, and the other end of the transmission rod 7 drives the hinged fixed shaft 8 to move, make fixed axle 8 drive bracing piece 3 and remove, thereby make bracing piece 3 rotate as the center through first connecting seat 21 with pivot 20, thereby adjust the position of bracing piece 3, adjust the position of mount pad 23 through bracing piece 3, then through passing 23 internally mounted holes of mount pad and fixing mount pad 23 in suitable position with fixing bolt, then place the bus duct and install on the surface of backup pad 1, make and to adjust according to mounted position in the time of the installation, the work progress for relevant personnel brings the facility.

The side wall of the mounting seat 23 is fixedly provided with a cushion block 25, the cushion block 25 is an elastic body, and the cushion block 25 of the elastic body is fixedly arranged on the surface of the mounting seat 23, so that the stability of the mounting seat 23 and a mounting surface is improved.

The lateral wall swing joint of slide bar 6 has leading wheel 27, and leading wheel 27 sliding connection is at the inside wall of planking 2, and leading wheel 27 establishes at the surface of slide bar 6 through the mounting hole movable sleeve at center for when planking 2 is slided to backup pad 1 surface, planking 2 laminating is slided at the surface of leading wheel 27, thereby has improved 2 accommodation process's of planking stability, and then has guaranteed the stability of bus duct installation process.

The lateral wall fixed mounting of threaded rod 10 has action bars 11, drives threaded rod 10 through action bars 11 and rotates for it is more convenient to adjust the operation of 3 processes of bracing piece.

The fixed mounting that the relative lateral wall difference of two risers 14 is symmetrical has the both ends of guide bar 12, guide bar 12 that fixed mounting and threaded rod 10 parallel between two risers 14, sliding connection of movable seat 13 is at the lateral wall of guide bar 12, when adjusting movable seat 13 position through rotating threaded rod 10, make movable seat 13 slide along the surface of guide bar 12 simultaneously, thereby prevent movable seat 13 offset, the stability of movable seat 13 removal process has been guaranteed, and then the stability of 3 accommodation processes of bracing piece has been guaranteed.

This embodiment a bus duct installing support, theory of operation does: when the bus duct is installed, the supporting plate 1 drives the outer plate 2 to move to a proper position, then the outer plate 2 is respectively slid to two sides of the supporting plate 1 according to the specification of the bus duct, so that the two outer plates 2 respectively drive the two supporting rods 3 to move to two sides, the area of a placing surface of the bus duct is adjusted, after the two outer plates 2 are slid to a proper length, the clamping bolt 16 is aligned to the clamping groove 28 on the corresponding position, then the clamping bolt 16 is rotated, the clamping bolt 16 is clamped in the corresponding clamping groove 28, so that the position of the outer plate 2 is locked, the position of the outer plate 2 is adjusted according to the specification of the installed bus duct, then the two threaded rods 10 are respectively rotated, the rotating threaded rods 10 enable the movable seat 13 in external surface threaded connection to move in the horizontal direction, the second connecting seat 9 moves along with the movable seat 13, and one end of the hinged transmission rod 7 is driven to move through the second connecting seat 9, so that the other end of the transmission rod 7 drives the hinged fixed shaft 8 to move, the fixed shaft 8 drives the support rod 3 to move, so that the support rod 3 is rotated about the rotation shaft 20 by the first connecting seat 21, thereby adjusting the position of the support rod 3, then the nut 24 is taken down from the outer surface of the adjusting bolt 22, then the fourth connecting seat 5 is rotated on the outer surface of the third connecting seat 4, the mounting seat 23 is rotated to the position which is jointed with the mounting surface through the fourth connecting seat 5, then the nut 24 is screwed on the outer surface of the adjusting bolt 22, the installation angle of the installation seat 23 is locked through the nut 24 and the adjusting bolt 22, the position of the installation seat 23 is adjusted through the support rod 3, then, the bus duct is installed by passing a fixing bolt through the mounting hole inside the mounting seat 23 and fixing the mounting seat 23 in place, and then placing the bus duct on the surface of the support plate 1.

Example 2

A bus duct mounting bracket is disclosed, as shown in figures 1 and 2, a third connecting seat 4 is fixedly mounted on a side wall of a support rod 3, a fourth connecting seat 5 is rotatably connected to an outer side wall of the third connecting seat 4, the fourth connecting seat 5 is fixedly mounted on a side wall of a mounting seat 23, a mounting groove is formed in the lower surface of the fourth connecting seat 5, so that the fourth connecting seat 5 is attached to the outer surface of the third connecting seat 4 through the mounting groove to slide, adjusting bolts 22 are respectively arranged in inner cavities of the third connecting seat 4 and the fourth connecting seat 5, through holes are formed in the same positions of the third connecting seat 4 and the fourth connecting seat 5, the adjusting bolts 22 simultaneously pass through the through holes in the same positions of the third connecting seat 4 and the fourth connecting seat 5, so that the third connecting seat 4 and the fourth connecting seat 5 simultaneously rotate by taking the adjusting bolts 22 as centers, nuts 24 are connected to outer side walls of the adjusting bolts 22 in a threaded manner, when the position of the mounting seat 23 is adjusted, the nut 24 is taken down on the outer surface of the adjusting bolt 22, then the fourth connecting seat 5 is rotated on the outer surface of the third connecting seat 4, the mounting seat 23 is rotated to the position attached to the mounting surface through the fourth connecting seat 5, then the nut 24 is screwed on the outer surface of the adjusting bolt 22, and the mounting angle of the mounting seat 23 is locked through the nut 24 and the adjusting bolt 22, so that related personnel can mount different positions, and convenience is brought to the construction process of the related personnel.

Third connecting seat 4 is the elastomer with fourth connecting seat 5, and at the in-process of twisting nut 24 through the surface at adjusting bolt 22, through the screwing up of nut 24 and adjusting bolt 22 make third connecting seat 4 and fourth connecting seat 5 elastic deformation, improved the stability of mount pad 23 position, and then guaranteed the stability of bus duct installation.

Claims

1. The utility model provides a bus duct installing support, includes backup pad (1), its characterized in that: the sliding connection of backup pad (1) lateral wall symmetry has planking (2), the left and right sides wall of backup pad (1) runs through respectively in two the lateral wall of planking (2) and extends to the inner chamber, the equal fixed mounting of the lateral wall of two planking (2) has pivot (20), the lateral wall of pivot (20) rotates and is connected with first connecting seat (21), first connecting seat (21) fixed mounting is at the lateral wall of bracing piece (3), the lateral wall of bracing piece (3) is connected with mount pad (23), the front and back both sides wall of planking (2) is symmetrical respectively has seted up spout (17), the fixed mounting that the left and right sides wall of backup pad (1) is symmetrical respectively has slider (26), slider (26) sliding connection is in the inside wall of planking (2), the fixed mounting that the front and back both sides wall of slider (26) is symmetrical respectively has the one end of slide bar (6), the other end fixed mounting of slide bar (6) has limiting plate (18), the lower lateral wall fixed mounting of limiting plate (18) has supporting seat (15), the inner chamber threaded connection of supporting seat (15) has joint bolt (16), slide bar (6) sliding connection in the inside wall of spout (17), limiting plate (18) sliding connection in the lateral wall of planking (2), draw-in groove (28) have been seted up to the lateral wall of planking (2) is even, draw-in groove (28) with joint bolt (16) are corresponding, planking (2) lateral wall fixed mounting has connecting plate (19), the fixed mounting of the last lateral wall symmetry of connecting plate (19) has riser (14), two the relative lateral wall rotation of symmetry respectively of riser (14) is connected with the both ends of threaded rod (10), the lateral wall threaded connection of threaded rod (10) has movable seat (13), the side wall fixed mounting that goes up of sliding seat (13) has second connecting seat (9), the inner chamber of second connecting seat (9) rotates the one end that is connected with transfer line (7), the other end of transfer line (7) rotates and is connected with fixed axle (8), fixed axle (8) fixed mounting be in the lateral wall of bracing piece (3).

2. The bus duct mounting bracket according to claim 1, characterized in that a third connecting seat (4) is fixedly mounted on the side wall of the supporting rod (3), a fourth connecting seat (5) is rotatably connected to the outer side wall of the third connecting seat (4), the fourth connecting seat (5) is fixedly mounted on the side wall of the mounting seat (23), adjusting bolts (22) are arranged in the inner cavities of the third connecting seat (4) and the fourth connecting seat (5), and nuts (24) are connected to the outer side wall of the adjusting bolts (22) in a threaded manner.

3. A bus duct mounting bracket according to claim 2, wherein the third connecting seat (4) and the fourth connecting seat (5) are both elastic bodies.

4. A bus duct mounting bracket according to claim 1, wherein a cushion block (25) is fixedly mounted on a side wall of the mounting seat (23), and the cushion block (25) is an elastic body.

5. A bus duct mounting bracket according to claim 1, wherein a guide wheel (27) is movably connected to an outer side wall of the sliding rod (6), and the guide wheel (27) is slidably connected to an inner side wall of the outer plate (2).

6. A bus duct mounting bracket according to claim 1, wherein the side wall of the threaded rod (10) is fixedly mounted with an operating rod (11).

7. A bus duct mounting bracket according to claim 1, wherein opposite side walls of the two vertical plates (14) are symmetrically and fixedly mounted with two ends of a guide rod (12), respectively, and the movable seat (13) is slidably connected to an outer side wall of the guide rod (12).