CN220238444U

CN220238444U - Butyl rubber powder mixing and fusing machine

Info

Publication number: CN220238444U
Application number: CN202321583115.9U
Authority: CN
Inventors: 陈洋; 陈来易; 杨贤珍
Original assignee: Wuhan Mingrihong High Performance Sealing Materials Co ltd
Current assignee: Wuhan Mingrihong High Performance Sealing Materials Co ltd
Priority date: 2023-06-21
Filing date: 2023-06-21
Publication date: 2023-12-26
Anticipated expiration: 2033-06-21

Abstract

The utility model relates to the technical field of butyl rubber production, and provides a butyl rubber powder mixing and fusing machine which comprises a cylinder, wherein a control panel is fixedly arranged on the front side of the cylinder, and a motor is fixedly arranged in the middle of the top of the cylinder; this butyl rubber powder mixes fusion machine uses through telescopic link structure and annular scraper blade structure's cooperation, during the use, utilize the cylinder to drive horizontal pole one and horizontal pole two rotatory, utilize the horizontal pole two after extending to scrape the raw materials that the piece can intensive mixing barrel inner chamber, after the stirring, utilize horizontal pole one and the design of the square of falling of horizontal pole external surface, prevent that the raw materials from being stained with the surface of attaching at horizontal pole one and horizontal pole two, the operation piece starts the control telescopic link simultaneously and moves down, utilize annular scraper blade to empty after ending at the raw materials and move down voluntarily and scrape the raw materials of being stained with and attach at the barrel inside, reach intensive mixing raw materials and prevent that the raw materials from being stained with the inside or agitating unit surface of barrel 1, reduce the extravagant effect of raw materials.

Description

Butyl rubber powder mixing and fusing machine

Technical Field

The utility model relates to the technical field of butyl rubber production, in particular to a butyl rubber powder mixing and fusing machine.

Background

Butyl rubber is one type of synthetic rubber, synthesized from isobutylene and a small amount of isoprene. Are commonly used in the manufacture of tires. In the waterproof field of building, butyl rubber has been popularized comprehensively with the name of environmental protection and replaced pitch, need take out the raw materials from former feed bin in the butyl rubber production process, then put into mixing stirring mechanism and carry out the mixing stirring, but traditional mixing stirring mechanism in the existing market is when using, in order to improve the homogeneity that the raw materials mixes, most all can install stirring mechanism and improve the homogeneity of stirring, but some raw materials that adhere to the inner wall of the blending tank are then difficult to obtain the stirring, so can influence the homogeneity of mixing of raw materials, also be inconvenient for people's later stage washs simultaneously.

Through searching, chinese patent publication No. CN217962130U discloses a butyl daub production raw material mixing and stirring mechanism, in the patent, a sliding nut, a moving plate and a magnet block are driven to move upwards through rotation of a threaded screw rod, so that a scraping ring plate is driven to move upwards, the raw material adhered to the inner wall of a mixing cylinder is scraped by the upward movement, after a period of time, the raw material adhered to the inner wall of the mixing cylinder is reversely rotated, the raw material adhered to the inner wall of the mixing cylinder is scraped again by the downward movement, and the raw material of the inner wall of the mixing cylinder is automatically scraped in the working process, so that the mixing efficiency is improved;

however, the mode is influenced by magnetic force of the magnetic block, larger uncertainty exists, a large amount of raw material adhering surfaces still exist after the scraping ring plate and the stirring rod are stirred, partial raw materials cannot be discharged to form waste, and meanwhile, the bottom of the mixing drum is designed in an inverted buckle mode as shown in the drawings in the patent, so that the raw materials at the bottom of the inner cavity of the mixing drum are difficult to fully mix.

Disclosure of Invention

The utility model provides a butyl rubber powder mixing and fusing machine, which solves the problems of insufficient mixing and raw material waste caused by the adhesion of part of mixed raw materials to the inner wall and the surface of a stirring structure in the related art.

The technical scheme of the utility model is as follows: the utility model provides a butyl rubber powder mixes fusion machine, includes the barrel, the front side fixed mounting of barrel has control panel, the middle part fixed mounting at barrel top has the motor, the equal fixed mounting in front and back both sides at barrel top has the inlet pipe, the equal fixed mounting in left and right sides at barrel top has the operation piece, the bottom fixed mounting of operation piece has the telescopic link, the top of barrel inner chamber is provided with annular scraper blade, the cylinder is installed in the middle part rotation of barrel inner chamber, the surface fixed mounting of cylinder has a plurality of horizontal poles one, the middle part of horizontal pole one is seted up flutedly, one side fixed mounting of recess towards the cylinder has spring one, the opposite side fixed mounting of spring one has horizontal pole two, the opposite side fixed mounting of horizontal pole two has scrapes the piece.

Preferably, the bin outlet has been seted up at the middle part of barrel inner chamber bottom, and the apron is installed through torsion axle rotation in the middle part of barrel bottom, and the sealing block is installed in the middle part rotation at apron top, and the equal fixed mounting in both sides has the bar frame around the barrel bottom, and the rubber block has been placed to the inner chamber bottom of bar frame, and the bottom fixed mounting of rubber block has the connecting rod, and the bottom fixed mounting of connecting rod has the diaphragm, and the bottom fixed mounting of diaphragm has the pull ring, and the surface of connecting rod is provided with spring two.

Preferably, the control panel is electrically connected with the motor through a wire, and an output shaft at the bottom of the motor is connected with the top of the cylinder, so that when the control panel is used, the motor is controlled to be started with different powers by pressing different buttons on the surface of the control panel, and the cylinder is controlled to rotate at different speeds.

Preferably, the inner chamber of inlet pipe runs through the inner chamber top of barrel, and the top of inlet pipe has the closing plate through pivot movable mounting to when using, utilize the closing plate to prevent in the use or when not using, have impurity to fall into the barrel inner chamber through the inlet pipe, influence the work efficiency of barrel.

Preferably, the operation block passes through wire and control panel electric connection, and the bottom of operation block passes barrel top lateral wall through the telescopic link and is connected with the top of annular scraper blade to during the use, utilize control panel control operation block to control the telescopic link downwardly extending after the raw materials fuses the discharge, with this annular scraper blade of driving moves down, utilizes annular scraper blade laminating barrel inner chamber lateral wall, with this raw materials that will be stained with at the barrel inner wall is scraped off, reduces the waste of raw materials.

Preferably, the first even fixed mounting of horizontal pole is at the cylindrical surface, and one side laminating barrel inner wall of piece is scraped to the tensile back of spring, scrapes one side shape of piece towards barrel inner wall direction and barrel inner wall's shape assorted to during the use, the cylinder is rotatory to drive horizontal pole one rotatory, and under centrifugal force's effect, horizontal pole two and scrape the piece and remove to barrel inner wall direction, make one side laminating barrel inner wall of scraping the piece, the cooperation is scraped the shape of piece and is scraped the raw materials that will be stained with at barrel inner wall with this automation, reaches the effect of evenly stirring mixed raw materials.

Preferably, the surface of the first cross rod and the surface of the second cross rod are of inverted square design, and the surface of one side of the first cross rod, which is contacted with the second cross rod, is of inclined plane design, so that when the novel cross rod is used, raw materials are difficult to adhere to the surface of the first cross rod and the surface of the second cross rod by utilizing the inverted square design of the outer surfaces of the first cross rod and the second cross rod, and the inclined plane design of one side of the first cross rod and the inclined plane design of one side of the second cross rod are matched, so that the raw materials are prevented from being brought into the groove when the second cross rod contracts and enters the inner cavity of the first cross rod.

Preferably, the shape and size of the sealing block are matched with the shape and size of the inner cavity of the discharge opening, and the bottom of the inner cavity of the cylinder body is designed in a reverse-buckling manner, so that when the novel double-protection type material discharging device is used, raw materials after being stirred are conveniently and rapidly discharged from the discharge opening, after being discharged, the discharge opening is blocked by the sealing block, the cover plate is loosened, and at the moment, the cover plate automatically reversely covers the sealing block under the action of a torsion shaft at the joint of the cover plate and the cylinder body, the sealing block is prevented from falling, and the tightness of the cylinder body is improved by double protection.

Preferably, the bottom of the rubber block penetrates through the bar frame to be fixedly connected with the connecting rod, and the length of the connecting rod is larger than the distance between the bottom of the bar frame and the bottom of the cylinder body, so that the rubber block can touch the bottom surface of the cylinder body when moving upwards.

Preferably, the second spring is arranged on the outer surface of the connecting rod between the transverse plate and the bottom of the bar frame, the top surface of the transverse plate is connected with the bottom surface of the bar frame through the second spring, when the connecting rod is used, the pull ring is manually stretched, the connecting rod moves downwards, the second spring is compressed at the moment, the second spring is released after being compressed to the maximum distance, at the moment, under the action of the elastic force of the second spring, the connecting rod drives the rubber block to move upwards rapidly, the length of the connecting rod is utilized, the bottom of the cylinder can be touched when the rubber block moves upwards, the bottom of the cylinder is vibrated, and raw materials at the bottom of the inner cavity of the cylinder are convenient to drop.

The working principle and the beneficial effects of the utility model are as follows:

1. this butyl rubber powder mixes fusion machine uses through telescopic link structure and annular scraper blade structure's cooperation, during the use, utilize the cylinder to drive horizontal pole one and horizontal pole two rotatory, utilize the horizontal pole two after extending to scrape the raw materials that the piece can intensive mixing barrel inner chamber, after the stirring, utilize horizontal pole one and the design of the square of falling of horizontal pole external surface, prevent that the raw materials from being stained with the surface of attaching at horizontal pole one and horizontal pole two, the operation piece starts the control telescopic link simultaneously and moves down, utilize annular scraper blade to empty after ending at the raw materials and move down voluntarily and scrape the raw materials of being stained with and attach at the barrel inside, reach intensive mixing raw materials and prevent that the raw materials from being stained with the inside or agitating unit surface of barrel 1, reduce the extravagant effect of raw materials.

2. This mixed fusion machine of butyl rubber powder uses through the cooperation of spring two structures and diaphragm structure, during the use, manual tensile pull ring for the connecting rod moves down, and spring two compression this moment, spring two compress to loosen after the maximum distance, and at this moment under spring two's elasticity effect, the connecting rod drives the rubber piece and moves up fast, utilizes the length of connecting rod for can touch the bottom of barrel when the rubber piece moves up, with the bottom of this vibrations barrel, the raw materials of barrel inner chamber bottom of being convenient for drops, improves the dumping efficiency of mixing back barrel inner chamber raw materials.

Drawings

The utility model will be described in further detail with reference to the drawings and the detailed description.

FIG. 1 is a schematic view of the front appearance of the overall structure of the present utility model;

FIG. 2 is a schematic view of the front view of the overall structure of the present utility model;

FIG. 3 is a schematic view of the front view of the entire structure of the present utility model;

FIG. 4 is a schematic side view of the overall structure of the present utility model shown in section;

FIG. 5 is a schematic view of the structure of FIG. 3A according to the present utility model;

FIG. 6 is a schematic diagram of the structure of FIG. 4B according to the present utility model;

fig. 7 is a schematic view of the structure of fig. 4 at C according to the present utility model.

In the figure: 1. a cylinder; 2. a control panel; 3. a motor; 4. a feed pipe; 5. an operation block; 6. a telescopic rod; 7. an annular scraping plate; 8. a cylinder; 9. a first cross bar; 10. a groove; 11. a first spring; 12. a second cross bar; 13. scraping blocks; 14. a discharge port; 15. a cover plate; 16. a sealing block; 17. a bar frame; 18. a rubber block; 19. a connecting rod; 20. a cross plate; 21. a pull ring; 22. and a second spring.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 7, a butyl rubber powder mixing and fusing machine comprises a cylinder 1, wherein a control panel 2 is fixedly arranged at the front side of the cylinder 1, the control panel 2 is electrically connected with a motor 3 through a lead, an output shaft at the bottom of the motor 3 is connected with the top of a cylinder 8, when in use, by pressing different buttons on the surface of the control panel 2, the motor 3 is controlled to start at different powers so as to control the cylinder 8 to rotate at different speeds, the motor 3 is fixedly arranged in the middle of the top of the cylinder 1, a feed pipe 4 is fixedly arranged at the front side and the rear side of the top of the cylinder 1, an inner cavity of the feed pipe 4 penetrates through the inner cavity top of the cylinder 1, a sealing plate is movably arranged at the top of the feed pipe 4 through a rotating shaft, so that impurities are prevented from falling into the inner cavity of the cylinder 1 through the feed pipe 4 by the sealing plate when in use or not in use, the working efficiency of the cylinder 1 is affected, the left side and the right side of the top of the cylinder body 1 are fixedly provided with an operation block 5, the operation block 5 is electrically connected with a control panel 2 through a lead, the bottom of the operation block 5 passes through the side wall of the top of the cylinder body 1 and is connected with the top of an annular scraping plate 7 through a telescopic rod 6, so that when the cylinder is used, the control panel 2 is used for controlling the operation block 5 to control the telescopic rod 6 to extend downwards after raw materials are fused and discharged, the annular scraping plate 7 is driven to move downwards, the annular scraping plate 7 is used for attaching the side wall of the inner cavity of the cylinder body 1, the raw materials attached to the inner wall of the cylinder body 1 are scraped off, the waste of the raw materials is reduced, the bottom of the operation block 5 is fixedly provided with the telescopic rod 6, the top of the inner cavity of the cylinder body 1 is provided with the annular scraping plate 7, the middle part of the inner cavity of the cylinder body 1 is rotatably provided with a cylinder 8, the outer surface of the cylinder 8 is fixedly provided with a plurality of cross rods 9, the cross rods 9 are uniformly and fixedly arranged on the outer surface of the cylinder 8, one side of the scraping block 13 is attached to the inner wall of the cylinder body 1 after the first spring 11 is stretched, one side of the scraping block 13 facing the inner wall direction of the cylinder body 1 is matched with the shape of the inner wall of the cylinder body 1, so that when the novel scraper is used, the cylinder 8 rotates to drive the first cross rod 9 to rotate, under the action of centrifugal force, the second cross rod 12 and the scraping block 13 move towards the inner wall direction of the cylinder body 1, one side of the scraping block 13 is attached to the inner wall of the cylinder body 1, the shape of the scraping block 13 is matched with the shape of the scraping block 13 to automatically scrape raw materials attached to the inner wall of the cylinder body 1, the effect of uniformly stirring and mixing the raw materials is achieved, the middle part of the first cross rod 9 is provided with a groove 10, one side of the groove 10 facing the cylinder 8 is fixedly provided with the first spring 11, the other side of the first spring 11 is fixedly provided with the second cross rod 12, the outer surfaces of the first cross rod 9 and the second cross rod 12 are in an inverted square design, and one side surface of the first cross rod 9 and the second cross rod 12 is in contact with an inclined surface design, when the novel scraper is used, the design of the inverted square shape of the outer surfaces of the first cross rod 9 and the second cross rod 12 is utilized, so that raw materials are difficult to adhere to the outer surfaces of the first cross rod 9 and the second cross rod 12, the inclined surface design of one side of the contact of the first cross rod 9 and the second cross rod 12 is matched, raw materials are prevented from being brought into the groove 10 when the second cross rod 12 is contracted into the inner cavity of the first cross rod 9, the scraping block 13 is fixedly arranged on the other side of the second cross rod 12, the discharge opening 14 is arranged in the middle of the bottom of the inner cavity of the cylinder 1, the cover plate 15 is rotatably arranged in the middle of the bottom of the cylinder 1 through the torsion shaft, the sealing block 16 is rotatably arranged in the middle of the top of the cover plate 15, the shape and the size of the sealing block 16 are matched with the shape and the size of the inner cavity of the discharge opening 14, the bottom of the inner cavity of the cylinder 1 is in the inverted buckle design, therefore, when the inverted buckle design of the inner cavity of the cylinder 1 is utilized, the stirred raw materials are conveniently and rapidly discharged from the discharge opening 14, after discharging, the raw materials are blocked by the sealing block 16 at first, the cover plate 15 is loosened again, the cover plate 15 automatically reverses and covers the sealing block 16 under the action of a torsion shaft at the joint of the cover plate 15 and the cylinder body 1, the sealing block 16 is prevented from falling, the tightness of the cylinder body 1 is improved by double protection, the strip-shaped frame 17 is fixedly installed on the front side and the rear side of the bottom of the cylinder body 1, the rubber block 18 is placed at the bottom of an inner cavity of the strip-shaped frame 17, the bottom of the rubber block 18 penetrates through the strip-shaped frame 17 and is fixedly connected with the connecting rod 19, the length of the connecting rod 19 is larger than the distance between the bottom of the strip-shaped frame 17 and the bottom of the cylinder body 1, the rubber block 18 can touch the bottom surface of the cylinder body 1 when moving upwards, the connecting rod 19 is fixedly installed at the bottom of the rubber block 18, the transverse plate 20 is fixedly installed with the pull ring 21, the outer surface of the connecting rod 19 is provided with the spring II 22, the spring II 22 is arranged on the outer surface of the connecting rod 19 between the transverse plate 20 and the bottom of the strip-shaped frame 17, and the top surface of the spring II 22 is connected with the bottom surface of the strip-shaped frame 17, therefore when in use, the connecting rod 19 is manually stretched, the connecting rod 19 is enabled to move downwards, the spring II 22 is compressed, the spring 19 is compressed and the bottom of the connecting rod 19 is enabled to move quickly and the bottom of the cylinder body 1 when the connecting rod 19 is driven to move under the action of the spring 19, and the bottom of the connecting rod 1 is enabled to fall, and the bottom of the cylinder body 1 is convenient.

Working principle: when the device is used, firstly, a sealing plate at the top of the feeding pipe 4 is opened, raw materials to be mixed and stirred are led into the inner cavity of the cylinder body 1, then, the sealing plate is closed to seal the feeding pipe 4, meanwhile, different buttons on the surface of the control panel 2 are pressed, the motor 3 is started with proper power, the cylinder 8 is further controlled to rotate in the inner cavity of the cylinder body 1, in the rotating process of the cylinder 8, under the action of centrifugal force, the cross rod II 12 and the scraping block 13 move towards the inner wall of the cylinder body 1, one side of the scraping block 13 is attached to the inner wall of the cylinder body 1, the shape of the scraping block 13 is matched to automatically scrape the raw materials attached to the inner wall of the cylinder body 1, the effect of fully stirring and mixing the raw materials is achieved, meanwhile, the inverted square design of the outer surfaces of the cross rod I9 and the cross rod II 12 is utilized, the raw materials are difficult to attach to the outer surfaces of the cross rod I9 and the cross rod II 12, and the inclined surface design of one side of the cross rod II 12 is matched, which contacts the cross rod II 12 is prevented from being brought into the groove 10 when the cross rod II contracts into the inner cavity of the cross rod I9;

after a period of time, the raw materials are mixed and stirred, the cover plate 15 is opened to take out the sealing block 16 from the discharge hole 14, at the moment, the mixed raw materials in the inner cavity of the cylinder 1 automatically fall from the discharge hole 14 under the action of gravity, and because of the inverted design of the bottom of the inner cavity of the cylinder 1, when the raw materials in the inner cavity of the cylinder 1 are not much, part of the raw materials can stay at the bottom of the inner cavity of the cylinder 1, at the moment, the pull ring 21 is manually stretched to enable the connecting rod 19 to move downwards, at the moment, the second spring 22 is compressed, the second spring 22 is released after being compressed to the maximum distance, at the moment, the connecting rod 19 drives the rubber block 18 to move upwards rapidly under the action of the elastic force of the second spring 22, and the length of the connecting rod 19 is utilized to enable the rubber block 18 to touch the bottom of the cylinder 1 when moving upwards, so that the bottom of the cylinder 1 can vibrate, and the raw materials at the bottom of the inner cavity of the cylinder 1 can fall conveniently;

then, the button on the control panel 2 is pressed, so that the control operation block 5 is started, the telescopic rod 6 extends downwards to drive the annular scraping plate 7 to move downwards along the inner wall of the cylinder body 1, and the inclined surface design on the upper side and the lower side of the annular scraping plate 7 is utilized to automatically scrape the raw material adhered to the inner wall of the cylinder body 1 and simultaneously prevent the raw material from adhering to the outer surface of the annular scraping plate 7.

In summary, compared with the common similar devices, the butyl rubber powder mixing and fusing machine has the advantages of fully mixing raw materials, preventing the raw materials from adhering to the inside of the cylinder 1 or the outer surface of the stirring device, and reducing raw material waste.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. The utility model provides a butyl rubber powder mixes fusion machine, a serial communication port, including barrel (1), the front side fixed mounting of barrel (1) has control panel (2), the middle part fixed mounting at barrel (1) top has motor (3), the equal fixed mounting in front and back both sides at barrel (1) top has inlet pipe (4), the equal fixed mounting in left and right sides at barrel (1) top has operation piece (5), the bottom fixed mounting of operation piece (5) has telescopic link (6), the top of barrel (1) inner chamber is provided with annular scraper blade (7), the middle part rotation in barrel (1) inner chamber has cylinder (8), the surface fixed mounting of cylinder (8) has a plurality of horizontal poles one (9), recess (10) have been seted up at the middle part of horizontal pole one (9), one side fixed mounting towards cylinder (8) has spring one (11), the opposite side fixed mounting of spring one (11) has horizontal pole two (12), the opposite side fixed mounting of horizontal pole two (12) has scraper block (13).

2. The butyl rubber powder mixing and fusing machine according to claim 1, wherein the middle part of the bottom of the inner cavity of the cylinder body (1) is provided with the discharge port (14), the middle part of the bottom of the cylinder body (1) is rotationally provided with the cover plate (15) through the torsion shaft, the middle part of the top of the cover plate (15) is rotationally provided with the sealing block (16), the front side and the rear side of the bottom of the cylinder body (1) are fixedly provided with the bar frame (17), the bottom of the inner cavity of the bar frame (17) is provided with the rubber block (18), the bottom of the rubber block (18) is fixedly provided with the connecting rod (19), the bottom of the connecting rod (19) is fixedly provided with the transverse plate (20), the bottom of the transverse plate (20) is fixedly provided with the pull ring (21), and the outer surface of the connecting rod (19) is provided with the spring II (22).

3. The butyl rubber powder mixing and fusing machine according to claim 1, wherein the control panel (2) is electrically connected with the motor (3) through a wire, and an output shaft at the bottom of the motor (3) is connected with the top of the cylinder (8).

4. The butyl rubber powder mixing and fusing machine according to claim 1, wherein the inner cavity of the feeding pipe (4) penetrates through the top of the inner cavity of the cylinder body (1), and a sealing plate is movably mounted on the top of the feeding pipe (4) through a rotating shaft.

5. The butyl rubber powder mixing and fusing machine according to claim 1, wherein the operation block (5) is electrically connected with the control panel (2) through a wire, and the bottom of the operation block (5) passes through the top side wall of the cylinder (1) through the telescopic rod (6) to be connected with the top of the annular scraping plate (7).

6. The butyl rubber powder mixing and fusing machine according to claim 1, wherein the first cross rod (9) is uniformly and fixedly arranged on the outer surface of the cylinder (8), one side of the scraping block (13) is attached to the inner wall of the cylinder (1) after the first spring (11) is stretched, and one side of the scraping block (13) facing the inner wall direction of the cylinder (1) is matched with the inner wall of the cylinder (1).

7. The butyl rubber powder mixing and fusing machine according to claim 1, wherein the outer surfaces of the first cross rod (9) and the second cross rod (12) are of inverted square design, and the surface of one side of the first cross rod (9) contacted with the second cross rod (12) is of an inclined surface design.

8. The butyl rubber powder mixing and fusing machine according to claim 2, wherein the shape and the size of the sealing block (16) are matched with those of the inner cavity of the discharge port (14), and the bottom of the inner cavity of the cylinder (1) is designed in an inverted buckle mode.

9. Butyl rubber powder mixing and fusing machine according to claim 2, characterized in that the bottom of the rubber block (18) penetrates through the bar frame (17) and is fixedly connected with the connecting rod (19), and the length of the connecting rod (19) is larger than the distance between the bottom of the bar frame (17) and the bottom of the cylinder (1).

10. Butyl rubber powder mixing and fusing machine according to claim 2, characterized in that the second spring (22) is arranged on the outer surface of the connecting rod (19) between the transverse plate (20) and the bottom of the bar frame (17), and the second spring (22) is connected with the top surface of the transverse plate (20) and the bottom surface of the bar frame (17).