CN221670915U

CN221670915U - Even curing ware that is heated of fodder processing

Info

Publication number: CN221670915U
Application number: CN202323474290.7U
Authority: CN
Inventors: 焦协阳; 吴祖刚; 王德玉
Original assignee: Henan Wangpai Biotechnology Co ltd
Current assignee: Henan Wangpai Biotechnology Co ltd
Priority date: 2023-12-20
Filing date: 2023-12-20
Publication date: 2024-09-10
Anticipated expiration: 2033-12-20

Abstract

The utility model belongs to the technical field of feed processing, in particular to a uniformly heated curing device for feed processing, which comprises a curing device; an air inlet pipe is fixedly connected to the top of the curing device; an exhaust pipe is fixedly connected to the top of the curing device; a servo motor is fixedly connected to the top of the curing device in a pair support manner; through preventing the material that needs curing processing on the flitch, promote the handle again and make the flitch slide in the bracing piece, start the back through operating panel, hot steam can get into curing processing to the material in the curing ware through the intake pipe, make servo motor work through operating panel this moment, servo motor chance drive the axis of rotation rotates, when the axis of rotation rotates, the stay cord can wind in the axis of rotation and pull the connecting rod and remove, the subassembly of stirring that is located on the connecting rod through the removal of connecting rod can stir the thicker material department of piling up, the area that has increased the material when processing and hot steam contacted has reduced the time of material curing.

Description

Even curing ware that is heated of fodder processing

Technical Field

The utility model belongs to the technical field of feed processing, and particularly relates to a uniformly heated curing device for feed processing.

Background

In the present life, raw materials of some pig feeds are processed by using a curing device, and the curing device can heat the materials by a hot steam method and the like, so that bacteria in material particles can be reduced after the materials are cured, and the storage time of the materials can be prolonged.

In curing materials, the materials are usually placed in a container for processing, cured by heat supplied by heating with hot steam or heating wires supplied through pipes, and then crushed and mixed with other components to be processed into pellet feed.

In the prior art, when the feed processing is cured, the materials are poured into equipment and then cured by heating, and as the raw materials of the feed are mostly large particles, the materials are piled up when the materials are cured, so that the heating curing area is reduced, the materials are difficult to cure rapidly, and the production efficiency is reduced.

Disclosure of utility model

In order to overcome the deficiencies of the prior art, at least one technical problem presented in the background art is solved.

The technical scheme adopted for solving the technical problems is as follows: the utility model relates to a uniformly heated curing device for feed processing, which comprises a curing device; an air inlet pipe is fixedly connected to the top of the curing device; an exhaust pipe is fixedly connected to the top of the curing device; servo motors are symmetrically fixedly connected to the top of the curing device; the end part of the servo motor penetrates through the curing device and is in sliding connection with the curing device; a rotating shaft is fixedly connected to the end part of the servo motor; the rotating shaft is in rotating connection with the curing device; a plurality of groups of support rods are symmetrically fixedly connected to the inner side of the curing device; a discharging plate is connected between the support rods in a sliding manner; the side wall of the curing device a plurality of groups of sealing plates are arranged; a baffle is fixedly connected to one end, far away from the curing device, of the discharging plate; the side wall of the baffle is fixedly connected with a handle; the sealing plate and the side wall of the curing device are fixedly connected with a first telescopic rod; the first telescopic rods are symmetrically arranged; the end part of the first telescopic rod is fixedly connected with a connecting rod; a first spring is fixedly connected between the connecting rod and the first telescopic rod; the first spring is sleeved on the first telescopic rod; a stirring assembly is arranged on the connecting rod; pull ropes are symmetrically and fixedly connected between the connecting rods and the rotating shafts; the lateral walls of the curing device are symmetrically provided with the air-changing devices, so that the problem that the material is stacked thickly when the material is placed on the discharging plate for curing is solved, the contact area between the material and hot steam during processing is increased, and the curing time of the material is shortened.

Preferably, the top of the connecting rod is symmetrically fixedly connected with a connecting plate; the connecting plate is L-shaped; a chute is formed in the top of the connecting rod; the side wall of the connecting plate is fixedly connected with a second telescopic rod; a top plate is fixedly connected to the end of the second telescopic rod; a second spring is fixedly connected between the second telescopic rod and the top plate; the second spring is sleeved on the second telescopic rod; the top plate is fixedly connected with the poking assembly; the poking assembly is in sliding connection with the sliding groove, so that the problem that the poking assembly with a large material volume is difficult to comb materials is solved, and the application range of the poking assembly is enlarged.

Preferably, the side wall of the ventilation device is fixedly connected with a first magnetic ring; the side wall of the first magnetic ring is connected with a second magnetic ring in a magnetic attraction manner; the inner side wall of the second magnetic ring is fixedly connected with a filter screen; the first magnetic ring and the second magnetic ring are corresponding to the positions of the air interchanger, so that impurities in the air interchanger during air exhaustion of the air interchanger are reduced, and the quality of material processing is improved.

Preferably, the bottom of the connecting rod is symmetrically fixedly connected with a connecting shaft; the bottom of the connecting shaft is rotationally connected with a roller; the roller is in sliding connection with the supporting rod, so that stability of the connecting rod during movement is improved, and shaking of the connecting rod is reduced.

Preferably, the side wall of the sealing plate is symmetrically provided with sealing grooves; sealing strips are symmetrically and fixedly connected to the side walls of the baffle; the sealing groove corresponds to the sealing strip in position, so that the problem of air pressure leakage during material processing is reduced.

Preferably, electromagnetic devices are symmetrically embedded in the side walls of the sealing plate; the side walls of the baffle are symmetrically embedded with magnetic blocks; the electromagnetic device is connected with the magnetic block in a magnetic attraction way, so that the problem that hot steam leaks out through a gap is solved, and the compactness between the baffle and the sealing plate is improved.

Preferably, the bottom of the connecting rod is provided with a plurality of groups of elastic plates in a linear array; the elastic plate is hinged with the connecting rod; the torsional spring is installed at the hinge of the elastic plate, so that the area of the material during processing is increased, and the material processing time is shortened.

The utility model has the beneficial effects that:

1. According to the uniformly heated curing device for feed processing, due to the arrangement of the top plate, when the volume of materials is large or the stacking is high, the stirring assembly can slide in the sliding groove and push the top plate upwards under the contact with the materials, and at the moment, the top plate pushes the second telescopic rod and the second spring through the stirring assembly, so that the problem that the stirring assembly is difficult to comb the materials due to the large volume of the materials is solved, and the application range of the stirring assembly is increased.

2. According to the even heated curing device for feed processing, due to the fact that the roller is arranged, when the connecting rod moves, the roller rolls on the supporting rod, so that the connecting rod is more stable in the moving process, and due to the fact that the roller is a cylinder, resistance of the roller when rolling on the supporting rod is small, movement of the connecting rod is not hindered, stability of the connecting rod when moving is improved, and shaking of the connecting rod is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is a perspective view of a rotor in the present utility model;

FIG. 3 is a perspective view of a pull cord according to the present utility model;

FIG. 4 is a perspective view of the blanking plate of the present utility model;

FIG. 5 is a perspective view of an elastic plate according to the present utility model;

Fig. 6 is a perspective view of a filter screen according to the present utility model.

Legend description:

1. A curing device; 11. an air inlet pipe; 111. an exhaust pipe; 12. a servo motor; 13. a rotating shaft; 14. a support rod; 141. a discharging plate; 15. a pull rope; 16. a connecting rod; 161. the assembly is stirred; 17. a first telescopic rod; 171. a first spring; 18. a sealing plate; 19. a baffle; 191. a handle; 192. a ventilation device; 2. a connecting plate; 21. a chute; 22. a second telescopic rod; 23. a top plate; 24. a second spring; 3. a first magnetic ring; 31. a second magnetic ring; 32. a filter screen; 4. a connecting shaft; 41. a roller; 5. sealing grooves; 51. a sealing strip; 6. electromagnetic device, 61, magnetic block; 7. an elastic plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled 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.

Specific examples are given below.

Referring to fig. 1-5, the utility model provides a uniformly heated curing device for feed processing, which comprises a curing device 1; an air inlet pipe 11 is fixedly connected to the top of the curing device 1; an exhaust pipe 111 is fixedly connected to the top of the curing device 1; the top of the curing device 1 is symmetrically fixedly connected with a servo motor 12; the end part of the servo motor 12 penetrates through the curing device 1 and is in sliding connection with the curing device 1; a rotating shaft 13 is fixedly connected to the end part of the servo motor 12; the rotating shaft 13 is in rotating connection with the curing device 1; a plurality of groups of support rods 14 are symmetrically fixedly connected to the inner side of the curing device 1; a discharging plate 141 is connected between the support rods 14 in a sliding manner; a plurality of groups of sealing plates 18 are arranged on the side wall of the curing device 1; a baffle 19 is fixedly connected to one end of the discharging plate 141, which is far away from the curing device 1; a handle 191 is fixedly connected to the side wall of the baffle 19; the sealing plate 18 and the side wall of the curing device 1 are fixedly connected with a first telescopic rod 17; the first telescopic rods 17 are symmetrically arranged; the end part of the first telescopic rod 17 is fixedly connected with a connecting rod 16; a first spring 171 is fixedly connected between the connecting rod 16 and the first telescopic rod 17; the first spring 171 is sleeved on the first telescopic rod 17; a toggle assembly 161 is mounted on the connecting rod 16; pull ropes 15 are symmetrically fixedly connected between the connecting rods 16 and the rotating shafts 13; the side wall of the curing device 1 is symmetrically provided with the ventilation device 192, in operation, the material to be cured is prevented from being on the discharging plate 141, the discharging plate 141 is made to slide in the supporting rod 14 by pushing the handle 191, after the material is started through the operation panel, hot steam can enter the curing device 1 through the air inlet pipe 11 to cure the material, at the moment, the servo motor 12 is made to work through the operation panel, the rotating shaft 13 can be driven to rotate by the servo motor 12, when the rotating shaft 13 rotates, the pull rope 15 can be wound on the rotating shaft 13 and pulls the connecting rod 16 to move, as the stirring component 161 is composed of the fixed rod and the deflector rod, the stirring component 161 which is located on the connecting rod 16 through the movement of the connecting rod 16 can stir the material where the material is stacked, when the servo motor 12 rotates to be fixed, the servo motor 12 can reversely rotate, at the moment, the first spring 171 which is located on the first telescopic rod 17 can pull the connecting rod 16 to reset the connecting rod 16, at the moment, the pull rope 15 which is made to be opened along with the servo motor 12 to reversely rotate the rotating shaft 13, the material placing on the discharging plate 141 is reduced in curing time, the problem that the material is stacked on the discharging plate 141 is thick, the material is stacked, the heat-contacting time is reduced, and the material is greatly heated.

Further, as shown in fig. 2 to 5, the top of the connecting rod 16 is symmetrically and fixedly connected with a connecting plate 2; the connecting plate 2 is L-shaped; a chute 21 is formed in the top of the connecting rod 16; the side wall of the connecting plate 2 is fixedly connected with a second telescopic rod 22; a top plate 23 is fixedly connected to the end part of the second telescopic rod 22; a second spring 24 is fixedly connected between the second telescopic rod 22 and the top plate 23; the second spring 24 is sleeved on the second telescopic rod 22; the top plate 23 is fixedly connected with the poking assembly 161; when the rotating shaft 13 pulls the pull rope 15 to enable the connecting rod 16 to move, when the rotating shaft 13 pulls the pull rope to enable the connecting rod 16 to move, the pulling assembly 161 slides in the sliding groove 21 and pushes the top plate 23 upwards under the contact with materials, at the moment, the top plate 23 pushes the second telescopic rod 22 and the second spring 24 of the pulling assembly 161, the pulling assembly 161 is located at a lower flat material position, the top plate 23 pushes the pulling assembly 161 under the pushing of the second spring 24 to enable the pulling assembly 161 to reset, the problem that the pulling assembly 161 with a larger material volume is difficult to comb the materials is solved, and the application range of the pulling assembly 161 is enlarged.

Further, as shown in fig. 6, a first magnetic ring 3 is fixedly connected to a side wall of the ventilation device 192; the side wall of the first magnetic ring 3 is connected with a second magnetic ring 31 in a magnetic attraction manner; the inner side wall of the second magnetic ring 31 is fixedly connected with a filter screen 32; when the material is cured, the air exchange device 192 is operated by the operation panel, the air exchange device 192 will remove the air in the curing device 1 to pretreat the curing device 1, and when the air in the curing device 1 is discharged by the air exchange device 192, the second magnetic ring 31 and the first magnetic ring 3 are adsorbed, the filter screen 32 on the second magnetic ring 31 will treat the air in the curing device 1 and block the impurities outside the curing device 1 from entering the curing device 1 by the air exchange device 192, thereby reducing the impurities in the air exchange device 192 when the air exchange device 192 is used for exhausting, and improving the quality of the material processing.

Further, as shown in fig. 3 to 5, the bottom of the connecting rod 16 is symmetrically and fixedly connected with a connecting shaft 4; the bottom of the connecting shaft 4 is rotatably connected with a roller 41; the roller 41 is in sliding connection with the support rod 14, when the material carding is carried out on the stirring component 161 through the movement of the connecting rod 16 in the working process, the roller 41 rolls on the support rod 14 through the connecting shaft 4 at the bottom of the connecting rod 16 and the roller 41 when the connecting rod 16 moves, so that the connecting rod 16 is more stable in the moving process, and the roller 41 is a cylinder, so that the resistance of the roller 41 when rolling on the support rod 14 is smaller, the movement of the connecting rod 16 is not hindered, the stability of the connecting rod 16 in the moving process is increased, and the shaking of the connecting rod 16 is reduced.

Further, as shown in fig. 2 to 4, the side wall of the sealing plate 18 is symmetrically provided with sealing grooves 5; the side wall of the baffle 19 is symmetrically fixedly connected with a sealing strip 51; the sealing groove 5 corresponds with the sealing strip 51 in position, during operation, when the blanking plate 141 slides into the supporting rod 14 to cure the material, the sealing strip 51 fixedly connected with the side wall of the baffle 19 through the sealing groove 5 formed in the side wall of the sealing plate 18 can be clamped into the sealing groove 5 when the sealing plate 18 contacts with the baffle 19, and the sealing strip 51 is a silica gel strip, so that the sealing strip 51 can be stable in the use process, the air tightness in the curing device 1 is improved, and the problem of air pressure leakage during material processing is solved.

Further, as shown in fig. 2 to 4, the side wall of the sealing plate 18 is symmetrically embedded with an electromagnetic device 6; the side walls of the baffle 19 are symmetrically embedded with magnetic blocks 61; when the feeding plate 141 slides into the supporting rod 14 by pushing the handle 191, when the feeding plate 141 slides into the designated position, the electromagnetic device 6 generates magnetic force in the electrified state, the baffle 19 and the sealing plate 18 are more tightly connected by the adsorption between the electromagnetic device 6 and the magnetic block 61, the electromagnetic device 6 is powered off by the operation panel after the processing is completed, the feeding plate 141 is scratched by pulling the handle 191, the problem that hot steam leaks out through a gap is reduced, and the tightness between the baffle 19 and the sealing plate 18 is increased.

Further, as shown in fig. 5, the bottom of the connecting rod 16 is provided with a plurality of groups of elastic plates 7 in a linear array; the elastic plate 7 is hinged with the connecting rod 16; the torsional spring is installed to the articulated department of elastic plate 7, and when rethread connecting rod 16 makes under the removal and stirs subassembly 161 and comb the material, when axis of rotation 13 carries out the rolling to stay cord 15, the material can make elastic plate 7 rotate under the extrusion, and when connecting rod 16 is located middle part assigned position, elastic plate 7 can reset under the effect of torsional spring, and connecting rod 16 can pull elastic plate 7 under the reversal of servo motor 12 makes elastic plate 7 carry out the pulling with the material, has increased the area when the material was processed, has reduced the time of material processing.

During operation, the material to be cured is placed on the discharging plate 141, the handle 191 is pushed to enable the discharging plate 141 to slide in the supporting rod 14, after the material is started through the operation panel, hot steam enters the curing device 1 through the air inlet pipe 11 to cure the material, at the moment, the servo motor 12 is operated through the operation panel, the servo motor 12 drives the rotating shaft 13 to rotate, when the rotating shaft 13 rotates, the pull rope 15 is wound on the rotating shaft 13 and pulls the connecting rod 16 to move, as the stirring assembly 161 consists of a fixed rod and a deflector rod, the stirring assembly 161 positioned on the connecting rod 16 can stir the material with thicker pile through the movement of the connecting rod 16, When the servo motor 12 rotates to a certain time, the servo motor 12 can rotate reversely, at the moment, the first spring 171 positioned on the first telescopic rod 17 pulls the connecting rod 16 to reset the connecting rod 16, at the moment, the pull rope 15 on the rotating shaft 13 can be released along with the rotation of the servo motor 12, so that the problem that when materials are placed on the blanking plate 141 to be cured and processed, the problem that the materials are stacked thickly is solved, the contact area of the materials with hot steam during processing is increased, the curing time of the materials is shortened, when the rotating shaft 13 pulls the pull rope 15 to move the connecting rod 16, the volume of the materials is larger or the stacking is higher, the toggle assembly 161 slides in the chute 21 and pushes the top plate 23 upwards under the contact with the material, at this time, the top plate 23 pushes the second telescopic rod 22 and the second spring 24 under the toggle assembly 161, at the position where the toggle assembly 161 is positioned at a lower level of the material, the top plate 23 presses the toggle assembly 161 under the push of the second spring 24 to reset the toggle assembly 161, so that the problem that the toggle assembly 161 with a larger material volume is difficult to comb the material is reduced, the application range of the toggle assembly 161 is increased, the air exchanging device 192 is operated through the operation panel when the material is cured, At this time, the air ventilator 192 will remove the air in the curing device 1 to pretreat the curing device 1, when the air in the curing device 1 is removed by the air ventilator 192, the second magnetic ring 31 is adsorbed with the first magnetic ring 3, at this time, the filter screen 32 on the second magnetic ring 31 will treat the air in the curing device 1 and prevent the impurity outside the curing device 1 from entering the curing device 1 through the air ventilator 192, thereby reducing the impurity in the air ventilator 192 when the air ventilator 192 is removed, improving the quality of material processing, when the toggle assembly 161 is used for carding the material by the movement of the connecting rod 16, Through the connecting shaft 4 and the roller 41 at the bottom of the connecting rod 16, when the connecting rod 16 moves, the roller 41 rolls on the supporting rod 14, so that the connecting rod 16 is more stable in the moving process, because the roller 41 is a cylinder, the resistance of the roller 41 when rolling on the supporting rod 14 is smaller, the movement of the connecting rod 16 is not blocked, the stability of the connecting rod 16 in moving is improved, the shaking of the connecting rod 16 is reduced, when the discharging plate 141 slides into the supporting rod 14 to cure materials, the sealing strip 51 fixedly connected with the side wall of the baffle 19 through the sealing groove 5 arranged on the side wall of the sealing plate 18, When the sealing plate 18 contacts with the baffle 19, the sealing strip 51 is clamped into the sealing groove 5, because the sealing strip 51 is a silica gel strip, the sealing strip 51 is stable in the use process, the air tightness in the curing device 1 is increased, the problem of air pressure leakage in the process of processing materials is reduced, when the discharging plate 141 slides into the supporting rod 14 by pushing the handle 191, when the discharging plate 141 slides to a specified position, the electromagnetic device 6 generates magnetic force in the electrified state, the connection between the baffle 19 and the sealing plate 18 is tighter by the adsorption between the electromagnetic device 6 and the magnetic block 61, after the processing is completed, the electromagnetic device 6 is powered off by the operation panel, The discharging plate 141 is drawn by pulling the handle 191, the problem that hot steam leaks out through a gap is reduced, the tightness between the baffle 19 and the sealing plate 18 is increased, when the stirring component 161 is used for carding materials by the movement of the connecting rod 16, when the pull rope 15 is wound by the rotating shaft 13, the elastic plate 7 is rotated under extrusion, when the connecting rod 16 is positioned at the middle designated position, the elastic plate 7 is reset under the action of the torsion spring, the elastic plate 7 is pulled by the elastic plate 7 by the reverse rotation of the servo motor 12, the area of the materials during processing is increased, The material processing time is reduced.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.

Claims

1. A uniformly heated curing device for feed processing, which comprises a curing device (1); the method is characterized in that: an air inlet pipe (11) is fixedly connected to the top of the curing device (1); an exhaust pipe (111) is fixedly connected to the top of the curing device (1); a servo motor (12) is symmetrically fixedly connected to the top of the curing device (1); the end part of the servo motor (12) penetrates through the curing device (1) and is in sliding connection with the curing device (1); a rotating shaft (13) is fixedly connected to the end part of the servo motor (12); the rotating shaft (13) is in rotating connection with the curing device (1); a plurality of groups of support rods (14) are symmetrically fixedly connected to the inner side of the curing device (1); a discharging plate (141) is connected between the support rods (14) in a sliding manner; a plurality of groups of sealing plates (18) are arranged on the side wall of the curing device (1); a baffle (19) is fixedly connected to one end of the discharging plate (141) away from the curing device (1); a handle (191) is fixedly connected to the side wall of the baffle (19); the sealing plate (18) and the side wall of the curing device (1) are fixedly connected with a first telescopic rod (17); the first telescopic rods (17) are symmetrically arranged; the end part of the first telescopic rod (17) is fixedly connected with a connecting rod (16); a first spring (171) is fixedly connected between the connecting rod (16) and the first telescopic rod (17); the first spring (171) is sleeved on the first telescopic rod (17); a stirring component (161) is arranged on the connecting rod (16); pull ropes (15) are symmetrically and fixedly connected between the connecting rods (16) and the rotating shaft (13); ventilation devices (192) are symmetrically arranged on the side wall of the curing device (1).

2. A fodder processing uniformity heated curing apparatus according to claim 1, characterized in that: the top of the connecting rod (16) is symmetrically fixedly connected with a connecting plate (2); the connecting plate (2) is L-shaped; a chute (21) is formed in the top of the connecting rod (16); a second telescopic rod (22) is fixedly connected to the side wall of the connecting plate (2); a top plate (23) is fixedly connected to the end part of the second telescopic rod (22); a second spring (24) is fixedly connected between the second telescopic rod (22) and the top plate (23); the second spring (24) is sleeved on the second telescopic rod (22); the top plate (23) is fixedly connected with the poking assembly (161); the stirring component (161) is in sliding connection with the chute (21).

3. A fodder processing uniformity heated curing apparatus according to claim 1, characterized in that: a first magnetic ring (3) is fixedly connected to the side wall of the ventilation device (192); a second magnetic ring (31) is connected to the side wall of the first magnetic ring (3) in a magnetic attraction manner; the inner side wall of the second magnetic ring (31) is fixedly connected with a filter screen (32); the first magnetic ring (3) and the second magnetic ring (31) are corresponding to the positions of the air interchanger (192).

4. A fodder processing uniformity heated curing apparatus according to claim 1, characterized in that: the bottom of the connecting rod (16) is symmetrically fixedly connected with a connecting shaft (4); the bottom of the connecting shaft (4) is rotatably connected with a roller (41); the roller (41) is in sliding connection with the supporting rod (14).

5. A fodder processing uniformity heated curing apparatus according to claim 1, characterized in that: the side wall of the sealing plate (18) is symmetrically provided with sealing grooves (5); sealing strips (51) are symmetrically fixedly connected to the side walls of the baffle (19); the sealing groove (5) corresponds to the sealing strip (51) in position.

6. A fodder processing uniformity heated curing apparatus according to claim 1, characterized in that: electromagnetic devices (6) are symmetrically embedded in the side walls of the sealing plates (18); the side walls of the baffle plates (19) are symmetrically embedded with magnetic blocks (61); the electromagnetic device (6) is in magnetic attraction connection with the magnetic block (61).

7. A fodder processing uniformity heated curing apparatus according to claim 1, characterized in that: the bottoms of the connecting rods (16) are provided with a plurality of groups of elastic plates (7) in a linear array; the elastic plate (7) is hinged with the connecting rod (16); and a torsion spring is arranged at the hinge joint of the elastic plate (7).