Granule packaging machine discharging device capable of preventing caking
By designing a particle packaging machine unloading device that includes a conveying propeller, connecting rod, crushing piece and filter screen, the screening problems and agglomeration and blockage problems caused by different particle sizes are solved, and the particle quality and discharge efficiency are improved. .
Patent Information
- Application Number
- CN202420949699.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-06
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-05-06
AI Technical Summary
The existing pellet packaging machine cutting device cannot be screened due to different particle sizes when discharged, resulting in a decrease in particle quality, inconvenient screening for staff, low discharge efficiency, and internal temperature problems of the particles may lead to clumping.
A unloading device including a conveying propeller, connecting rod, broken piece, placement plate and unloading port is designed. The driving motor drives the conveying propeller to rotate. The connecting rod and broken piece break up the internal agglomeration of the particles. Belts, gears and eccentric The wheel drives the filter screen for screening and dispersion.
It can effectively prevent particle agglomeration, improve particle quality and discharging efficiency, and simplify the screening work of workers.
Smart Images

Figure CN222388385U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of packaging machines, in particular to a material discharging device for a particle packaging machine capable of preventing agglomeration. Background Art
[0002] The granule packaging machine is suitable for the quantitative packaging of rubber granules, plastic granules, fertilizer granules, feed granules, chemical granules, grain granules, building material granules, metal granules and sealed granules. It has fast speed and high precision. Therefore, it can be seen that many products on the market can use granule packaging machines.
[0003] Announcement No. CN214029213U discloses a feeding device for a particle packaging machine. A particle quantitative storage box is arranged between two ball valves to enable quantitative feeding. The particles are first opened to fill the entire particle quantitative storage box, and then the first valve baffle is closed and the second valve baffle is opened to allow a certain amount of particles to be fed, so as to achieve a more accurate effect of the number of particles fed quantitatively. However, the patent still has the following problems in actual use:
[0004] A quantitative particle storage box is provided between the two ball valves, so that quantitative material discharge can be performed. However, when the particles are discharged, due to the different sizes of the particles, particles of different sizes cannot be screened during discharge, which results in reduced particle quality. At the same time, it is inconvenient for subsequent staff to screen the particles, which reduces the work efficiency of the staff. At the same time, due to temperature problems inside the particles, particles may agglomerate, which may cause the particles to block the discharge port during discharge, thereby reducing the discharge efficiency of the particles.
[0005] A material discharging device for a particle packaging machine which can prevent agglomeration is proposed, so as to solve the above-mentioned problems. Utility Model Content
[0006] The utility model aims to provide a feeding device for a particle packaging machine which can prevent agglomeration, so as to solve the problem proposed in the above-mentioned background technology that a particle quantitative storage box is currently provided between two ball valves so as to enable quantitative feeding, but when the particles are discharged, due to the different sizes of the particles, the particles of different sizes cannot be screened during the discharge, which results in reduced quality of the particles, and at the same time, it is inconvenient for subsequent staff to screen the particles, which reduces the work efficiency of the staff, and at the same time, due to temperature problems inside the particles, agglomeration may occur between the particles, which may cause the particles to block the discharge port during discharge, thereby reducing the discharge efficiency of the particles.
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a material unloading device for a particle packaging machine to prevent agglomeration, comprising a box body and a driving motor, wherein a side surface of the box body close to the top is fixedly connected to the driving motor;
[0008] A feeding port is provided on one side of the top surface of the box body, a support plate is fixedly connected to a side surface of the box body close to the bottom, the top surface of the support plate is fixedly connected to the driving motor, the output end of the driving motor passes through a side surface of the box body and is fixedly connected to a conveying screw, a side surface of the conveying screw away from the driving motor is rotatably connected to the box body, connecting rods are passed through and connected on both sides of the conveying screw, a plurality of crushing pieces are fixedly installed on the surface of the connecting rods, a placement plate is fixedly installed below the conveying screw, a feeding port is provided on one side surface of the placement plate, and a guide plate is fixedly installed below the placement plate;
[0009] Also includes:
[0010] A belt is meshedly connected to a surface of one side of the output end of the driving motor close to the tail;
[0011] The bottom surface of the belt is meshed with a rotating rod, the rotating rod is fixedly connected with a main gear on a side away from the belt passing through the box, the main gear is meshed with a slave gear on a side away from the rotating rod, and an eccentric wheel is fixedly connected in the middle of the surface of the slave gear;
[0012] Among them, a stabilizing plate is fitted and connected to the surface of one side of the eccentric wheel, a push rod is fixedly connected to the middle of the surface of the stabilizing plate away from the eccentric wheel, a limit sleeve is penetrated and connected to the surface of the push rod away from the stabilizing plate, limit rods are symmetrically installed on both sides of the surface of the limit sleeve, a surface of the limit rod away from the limit sleeve is fixedly connected to the box body, a surface of the rotating rod away from the main gear is rotatably connected with a fixing sleeve, both sides of the fixing sleeve are fixedly connected to the box body, a limit box is fixedly installed on one side of the interior of the box body, limit frames are symmetrically installed on both sides of the limit box, a surface of the limit frame away from the limit box is fixedly connected to the box body, a first spring is fixedly installed inside the limit box, and the first spring away from the limit box A push rod is fixedly connected to the surface of one side, and the push rod is connected through the limit box. A support rod is symmetrically installed inside the box body. A connecting disk is fixedly connected to the surface of the support rod on the side away from the box body. The top surface of the connecting disk is connected through a feed pipe. A rotating disk is rotatably connected inside the connecting disk. A number of grooves are provided around the surface of the rotating disk, and a discharge port is provided in the middle of the bottom surface of the connecting disk. A baffle is fixedly connected to the top surface of the feed pipe, and the baffle is connected through the guide plate. A slide groove is provided in the middle of the bottom surface of the box body, and a slider is slidably connected inside the slide groove. The top surface of the slider is fixedly connected to a collecting box, and a filter screen is provided above the collecting box.
[0013] Preferably, a fixed rod is rotatably connected to the middle of the top surface of the gear, the top surface of the fixed rod is fixedly connected to the box body, a fixed plate is fixedly connected to the middle of the top surface of the box body, a servo motor is fixedly installed on the surface of the fixed plate, and the output end of the servo motor passes through one side surface of the box body and is fixedly connected to the rotating disk.
[0014] Preferably, slots are provided on both sides of the filter screen, the slots are engaged with the top rod and the push rod, a second spring is sleeved on the surface of the top rod, one side surface of the second spring is fixedly connected to the stabilizing plate, and the other side surface of the second spring is fixedly connected to the limit sleeve.
[0015] Compared with the prior art, the utility model has the following beneficial effects: the unloading device of the particle packaging machine for preventing agglomeration can convey the particles by arranging a conveying screw, a connecting rod, a crushing piece, a placing plate and a unloading port, and at the same time, the connecting rod and the crushing piece can break up the agglomerated parts inside the particles, so as to achieve the purpose of preventing agglomeration, and at the same time, by arranging the cooperation of the belt, the rotating rod, the main gear, the slave gear, the eccentric wheel, the stabilizing plate, the top rod, the limit sleeve, the limit rod, the fixed sleeve, the limit box, the limit frame, the first spring and the push rod, the particles conveyed can be screened, so as to effectively improve the production quality of the particles, and the specific contents are as follows:
[0016] 1. By arranging a belt, a rotating rod, a main gear, a slave gear, an eccentric wheel, a stabilizing plate, a push rod, a limit sleeve, a limit rod, a fixed sleeve, a limit box, a limit frame, a first spring and a push rod, the belt is driven to rotate by a driving motor, the rotation of the belt can drive the rotation of the rotating rod, the rotation of the rotating rod can drive the rotation of the main gear, the rotation of the main gear can drive the rotation of the slave gear, the rotation of the slave gear can drive the rotation of the eccentric wheel, the rotation of the eccentric wheel can drive the movement of the stabilizing plate, the movement of the stabilizing plate can drive the movement of the push rod, the movement of the push rod can drive the movement of the filter screen, so that the filter screen can be driven to reciprocate, so that the conveyed particles can be scattered, and particles of different sizes can also be screened, so that the production quality can be effectively improved;
[0017] 2. By arranging a conveying propeller, a connecting rod, a crushing piece, a placement plate and a discharge port, the conveying propeller is driven to rotate by a driving motor, and the rotation of the conveying propeller can drive the rotation of the connecting rod and the crushing piece, so that the agglomerated places inside the particles can be broken up, thereby achieving the purpose of anti-caking. At the same time, the connection plate, the feed pipe, the rotating plate, the groove, the discharge port and the baffle are coordinated, so that the servo motor drives the rotation of the rotating plate, and the groove on the rotating plate can collect the particles coming in from the feed pipe, so that the particles can be discharged evenly, thereby preventing the occurrence of particle agglomeration, thereby improving the discharge efficiency of the particles. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the internal structure of the overall upper half of the utility model;
[0019] Figure 2 It is a schematic diagram of the internal structure of the overall lower half of the utility model;
[0020] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure of the middle A area;
[0021] Figure 4 For this utility model Figure 2 Schematic diagram of the enlarged structure of the middle B area;
[0022] Figure 5 This is a schematic diagram of the top view of the main gear and the slave gear in the utility model;
[0023] Figure 6 It is a schematic diagram of the overall top view structure of the utility model.
[0024] In the figure: 1, box body; 2, feed port; 3, support plate; 4, drive motor; 5, conveying propeller; 6, connecting rod; 7, crushing piece; 8, placement plate; 9, discharge port; 10, guide plate; 11, belt; 12, support rod; 13, connecting plate; 14, feed pipe; 15, rotating plate; 16, groove; 17, discharge port; 18, baffle; 19, slide; 20, slider; 21, collection box; 22, rotating rod; 23, main gear; 24, slave gear; 25, eccentric wheel; 26, stabilizing plate; 27, push rod; 28, limit sleeve; 29, limit rod; 30, fixed sleeve; 31, limit box; 32, limit frame; 33, first spring; 34, push rod; 35, filter screen; 36, fixed rod; 37, fixed plate; 38, servo motor; 39, slot; 40, second spring. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the implementation regulations described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] See also Figure 1-6 The utility model provides a technical solution: a material unloading device for a particle packaging machine that prevents agglomeration, comprising a box body 1 and a driving motor 4, a side surface of the box body 1 close to the top is fixedly connected to the driving motor 4; a feeding port 2 is provided on one side of the top surface of the box body 1, a side surface of the box body 1 close to the bottom is fixedly connected to a supporting plate 3, the top surface of the supporting plate 3 is fixedly connected to the driving motor 4, an output end of the driving motor 4 passes through a side surface of the box body 1 and is fixedly connected to a conveying propeller 5, a side surface of the conveying propeller 5 away from the driving motor 4 is rotatably connected to the box body 1, connecting rods 6 are penetrated and connected on both sides of the conveying propeller 5, a plurality of crushing pieces 7 are fixedly installed on the surface of the connecting rod 6, and a plurality of crushing pieces 7 are fixedly installed below the conveying propeller 5. A placement plate 8 is installed, a material discharge port 9 is opened on one side surface of the placement plate 8, and a guide plate 10 is fixedly installed below the placement plate 8; it also includes: a side surface of the output end of the driving motor 4 near the tail is meshed and connected with a belt 11; wherein, the bottom surface of the belt 11 is meshed and connected with a rotating rod 22, and the side surface of the rotating rod 22 away from the belt 11 passing through the box body 1 is fixedly connected with a main gear 23, and the side surface of the main gear 23 away from the rotating rod 22 is meshed and connected with a slave gear 24, and an eccentric wheel 25 is fixedly connected in the middle of the surface of the slave gear 24; wherein, a stabilizing plate 26 is bonded and connected to one side surface of the eccentric wheel 25, and a top rod 27 is fixedly connected in the middle of the side surface of the stabilizing plate 26 away from the eccentric wheel 25, such as Figure 1-3As shown, by arranging the belt 11, the rotating rod 22, the main gear 23, the slave gear 24, the eccentric wheel 25, the stabilizing plate 26, the push rod 27, the limiting sleeve 28, the limiting rod 29 and the fixing sleeve 30, the filter screen 35 can be driven to reciprocate, so that the particles on the filter screen 35 can be screened and scattered, thereby effectively preventing the occurrence of agglomeration and improving the quality of the particles. The surface of the push rod 27 on one side away from the stabilizing plate 26 is penetrated and connected with the limiting sleeve 28, and the limiting rods 29 are symmetrically installed on both sides of the surface of the limiting sleeve 28. The surface of the limiting rod 29 on one side away from the limiting sleeve 28 is fixedly connected to the box body 1, and the surface of the rotating rod 22 on one side away from the main gear 23 is rotatably connected with the fixing sleeve 30, and the two sides of the fixing sleeve 30 are fixedly connected to the box body 1, as shown in FIG. Figure 3 As shown, the belt 11 is driven by the driving motor 4 to rotate, the belt 11 can drive the rotating rod 22 to rotate, the rotating rod 22 can drive the main gear 23 to rotate, the main gear 23 can drive the slave gear 24 to rotate, the slave gear 24 can drive the eccentric wheel 25 to rotate, the eccentric wheel 25 can drive the movement of the stabilizing plate 26, the movement of the stabilizing plate 26 can drive the movement of the top rod 27, the movement of the top rod 27 can drive the movement of the filter 35, and the driving motor 4 and the rotating rod 22 can simultaneously drive the belt 11 to rotate, the belt 11 can drive the rotating rod 22, the rotating rod 22 can drive the main gear 23 to rotate, the slave gear 24 can drive the rotation of the eccentric wheel 25, ... filter 35, and the driving motor 4 and the rotating rod 22 can simultaneously drive the belt 11 to rotate, the belt 11 can drive the main gear 23 to rotate, the slave gear 24 can drive the rotation of the eccentric wheel 25, the eccentric wheel 25 can drive the movement of the stabilizing plate 26, the movement of the top rod 27, the movement of the filter 35, and the driving motor 4 and the rotating rod 22 can simultaneously drive the main gear 23 to rotate, the slave gear 24 can drive The surfaces of the rods 22 are provided with meshing textures that mesh with the belt 11, so that the driving motor 4 can drive the belt 11 to rotate, and the belt 11 can drive the rotation of the rotating rod 22. A limit box 31 is fixedly installed on one side of the interior of the box body 1, and limit frames 32 are symmetrically installed on both sides of the limit box 31. The surface of the limit frame 32 away from the limit box 31 is fixedly connected to the box body 1. A first spring 33 is fixedly installed inside the limit box 31, and a push rod 34 is fixedly connected to the surface of the first spring 33 away from the limit box 31. The push rod 34 is connected to the limit box 31 through, such as Figure 4 As shown, the first spring 33 is squeezed by the push rod 34, so that the first spring 33 is deformed, and at the same time, the back and forth movement between the top rod 27 and the push rod 34 can drive the filter screen 35 to move back and forth, so that the filter screen 35 can screen the particles.
[0027] A support rod 12 is symmetrically installed inside the box body 1. A connecting plate 13 is fixedly connected to the surface of the side of the support rod 12 away from the box body 1. A feed pipe 14 is connected to the top surface of the connecting plate 13. A rotating plate 15 is rotatably connected to the inside of the connecting plate 13. A plurality of grooves 16 are provided around the surface of the rotating plate 15. A discharge port 17 is provided in the middle of the bottom surface of the connecting plate 13. A baffle 18 is fixedly connected to the top surface of the feed pipe 14. The baffle 18 is connected to the guide plate 10 through the baffle 18. Figure 2As shown, the rotating disk 15 is driven to rotate by the servo motor 38, so that the grooves 16 on the rotating disk 15 can collect the particles coming in from the feed pipe 14, so that the particles can be discharged evenly. At the same time, the baffle 18 can block the particles transported by the guide plate 10, so as to avoid the particles from falling.
[0028] A chute 19 is provided in the middle of the bottom surface of the box body 1, a slider 20 is slidably connected inside the chute 19, a collection box 21 is fixedly connected to the top surface of the slider 20, and a filter screen 35 is provided above the collection box 21. Figure 2 Blocking plates are fixedly installed around the top surface of the filter screen 35, and the blocking plates can effectively prevent particles from falling when they are in reciprocating motion.
[0029] A fixing rod 36 is rotatably connected from the middle of the top surface of the gear 24, and the top surface of the fixing rod 36 is fixedly connected to the box body 1. A fixing plate 37 is fixedly connected to the middle of the top surface of the box body 1. A servo motor 38 is fixedly installed on the surface of the fixing plate 37. The output end of the servo motor 38 passes through a side surface of the box body 1 and is fixedly connected to the rotating disk 15. Slots 39 are provided on both sides of the filter screen 35. The slots 39 are engaged with the push rod 27 and the push rod 34. A second spring 40 is sleeved on the surface of the push rod 27. One side surface of the second spring 40 is fixedly connected to the stabilizing plate 26, and the other side surface of the second spring 40 is fixedly connected to the limiting sleeve 28. Figure 4-6 As shown, through the cooperation between the top rod 27 and the push rod 34, the filter screen 35 can be reciprocated, so that the particles can be screened. At the same time, the slot 39 and the top rod 27 and the push rod 34 can slide, so that after the particles are discharged, the particles on the filter screen 35 can be collected. At the same time, the first spring 33 and the second spring 34 are respectively acted upon by the limit box 31 and the top rod 27, so that the first spring 33 and the second spring 34 will not swing greatly during the rebound and extrusion process, thereby better driving the filter screen 35 to reciprocate.
[0030] Working principle: Before using this anti-caking granule packaging machine unloading device, you need to check the overall condition of the device to make sure it can work normally. Figure 1 - Figure 6As shown, firstly, by setting the belt 11, the rotating rod 22, the main gear 23, the slave gear 24, the eccentric wheel 25, the stabilizing plate 26, the top rod 27, the limiting sleeve 28, the limiting rod 29, the fixing sleeve 30, the limiting box 31, the limiting frame 32, the first spring 33 and the push rod 34, the belt 11 is driven to rotate by the driving motor 4, the rotating rod 22 is driven to rotate by the rotating belt 11, the main gear 23 is driven to rotate by the rotating rod 22, the slave gear 24 is driven to rotate by the main gear 23, and the eccentric wheel 25 is driven by the rotation of the slave gear 24. The rotation of the eccentric wheel 25 can drive the movement of the stabilizing plate 26, and the movement of the stabilizing plate 26 can drive the movement of the push rod 27, and the movement of the push rod 27 can drive the movement of the filter screen 35. At the same time, when the filter screen 35 moves, the filter screen 35 will squeeze the push rod 34, so that the push rod 34 will squeeze the first spring 33, causing the first spring 33 to deform. At the same time, the back and forth movement between the push rod 27 and the push rod 34 can drive the filter screen 35 to move back and forth, so that the filter screen 35 can screen the particles.
[0031] Secondly, by setting a conveying screw 5, a connecting rod 6, a crushing piece 7, a placement plate 8 and a discharge port 9, the conveying screw 5 is driven to rotate by the driving motor 4, and the rotation of the conveying screw 5 can drive the rotation of the connecting rod 6 and the crushing piece 7, so that the agglomerates inside the particles can be broken up, thereby achieving the purpose of preventing agglomeration. At the same time, the connection plate 13, the feed pipe 14, the rotating plate 15, the groove 16, the discharge port 17 and the baffle 18 are coordinated, so that the servo motor 38 drives the rotation of the rotating plate 15, so that the groove 16 on the rotating plate 15 can collect the particles coming in from the feed pipe 14, so that the particles can be discharged evenly, thereby preventing the occurrence of particle agglomeration.
[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. A material discharging device for a particle packaging machine for preventing agglomeration, comprising a box body (1) and a drive motor (4), wherein a side surface of the box body (1) close to the top is fixedly connected to the drive motor (4); A feeding port (2) is provided on one side of the top surface of the box body (1); a support plate (3) is fixedly connected to a side surface of the box body (1) close to the bottom; the top surface of the support plate (3) is fixedly connected to a driving motor (4); an output end of the driving motor (4) passes through a side surface of the box body (1) and is fixedly connected to a conveying screw (5); a side surface of the conveying screw (5) away from the driving motor (4) is rotatably connected to the box body (1); connecting rods (6) are passed through and connected to both sides of the conveying screw (5); a plurality of crushing pieces (7) are fixedly installed on the surface of the connecting rod (6); a placement plate (8) is fixedly installed below the conveying screw (5); a feeding port (9) is provided on a side surface of the placement plate (8); and a guide plate (10) is fixedly installed below the placement plate (8); It is characterized in that Also includes: A belt (11) is meshingly connected to a surface of one side of the output end of the drive motor (4) close to the tail; The bottom surface of the belt (11) is meshedly connected with a rotating rod (22); a surface of the rotating rod (22) on a side away from the belt (11) passing through the box (1) is fixedly connected with a main gear (23); a surface of the main gear (23) on a side away from the rotating rod (22) is meshedly connected with a slave gear (24); an eccentric wheel (25) is fixedly connected in the middle of the surface of the slave gear (24); A stabilizing plate (26) is fitted and connected to one side surface of the eccentric wheel (25); a push rod (27) is fixedly connected to the middle of the side surface of the stabilizing plate (26) away from the eccentric wheel (25); a side surface of the push rod (27) away from the stabilizing plate (26) is penetrated and connected to a limiting sleeve (28); limiting rods (29) are symmetrically installed on both sides of the surface of the limiting sleeve (28); a side surface of the limiting rod (29) away from the limiting sleeve (28) is fixedly connected to the box body (1); and the rotating rod (22) is away from the main gear. A fixed sleeve (30) is rotatably connected to a surface of one side of the wheel (23); both sides of the fixed sleeve (30) are fixedly connected to the box body (1); a limit box (31) is fixedly installed on one side of the interior of the box body (1); limit frames (32) are symmetrically installed on both sides of the limit box (31); a surface of a side of the limit frame (32) away from the limit box (31) is fixedly connected to the box body (1); a first spring (33) is fixedly installed inside the limit box (31); a first spring (33) away from the limit box (31) is fixedly installed on the first side of the limit frame (32); ) is fixedly connected to a push rod (34) on one side surface, the push rod (34) is connected through the limit box (31), a support rod (12) is symmetrically installed inside the box body (1), a connection plate (13) is fixedly connected to a surface of the support rod (12) on a side away from the box body (1), a feed pipe (14) is connected through the top surface of the connection plate (13), a rotating plate (15) is rotatably connected inside the connection plate (13), and a plurality of grooves (16) are provided around the surface of the rotating plate (15). A discharge port (17) is provided in the middle of the bottom surface of the connection plate (13); baffles (18) are fixedly connected to the top surface of the feed pipe (14) on all sides; the baffles (18) are connected to the guide plate (10); a slide groove (19) is provided in the middle of the bottom surface of the box body (1); a slider (20) is slidably connected to the inside of the slide groove (19); a collection box (21) is fixedly connected to the top surface of the slider (20); and a filter screen (35) is provided above the collection box (21).
2. The material discharging device of a particle packaging machine for preventing agglomeration according to claim 1, characterized in that: A fixing rod (36) is rotatably connected to the middle of the top surface of the slave gear (24); the top surface of the fixing rod (36) is fixedly connected to the box (1); a fixing plate (37) is fixedly connected to the middle of the top surface of the box (1); a servo motor (38) is fixedly mounted on the surface of the fixing plate (37); an output end of the servo motor (38) passes through a side surface of the box (1) and is fixedly connected to the rotating disk (15).
3. The unloading device of a particle packaging machine for preventing agglomeration according to claim 1, characterized in that: The filter screen (35) is provided with slots (39) on both sides, the slots (39) being engaged with the push rod (27) and the push rod (34), the surface of the push rod (27) being sleeved with a second spring (40), one side surface of the second spring (40) being fixedly connected to the stabilizing plate (26), and the other side surface of the second spring (40) being fixedly connected to the limiting sleeve (28).