Novel environment-friendly rubber additive filtering device

Abstract

The utility model relates to the technical field of novel environment-friendly rubber additive filtering, in particular to a novel environment-friendly rubber additive filtering device, which is convenient for filtering and screening environment-friendly rubber additives with different diameters, improves the practicability, is convenient for adjusting the feeding speed and improves the screening and filtering quality. Comprising a body mechanism; the device comprises a main body mechanism and further comprises a speed control mechanism, a screening mechanism, a driving mechanism and a mounting mechanism, the speed control mechanism is mounted at the top end of the main body mechanism, the screening mechanism is slidably mounted in the main body mechanism, the driving mechanism is mounted in the main body mechanism, and the mounting mechanism is mounted in the screening mechanism. The speed control mechanism facilitates adjustment of the feeding speed of the environment-friendly rubber auxiliary, the driving mechanism drives the screening mechanism to screen and filter the environment-friendly rubber auxiliary, and the mounting mechanism facilitates replacement of the screening mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of new environmentally friendly rubber additive filtering, in particular to a new environmentally friendly rubber additive filtering device. Background Art

[0002] New environmentally friendly rubber additives refer to a type of chemical additives with environmentally friendly properties used in the production process of rubber products. These additives can not only effectively improve the performance of rubber products, such as reinforcement, plasticization, and anti-aging, but also reduce pollution to the environment and meet the requirements of sustainable development.

[0003] In the existing new environmentally friendly rubber additive filtering technology, for example, the existing technology with application number CN202222381708.9, including a filter box, a feed port, a filter plate, a feed channel, a discharge door, a discharge port, a limit cylinder, a limit rod, a spring, a support plate and a first rotating shaft, when working, the raw materials to be filtered are poured into the filter box, and then the driving motor is started, the driving motor drives the driving roller to rotate, the driving roller drives the driven roller to rotate through the transmission belt, the driven roller drives the second rotating shaft to rotate, and the second rotating shaft drives the cam to rotate. Because the cam and the roller are abutted, the filter box can rise and fall while the cam rotates, thereby accelerating the screening speed of the raw materials.

[0004] However, the prior art is not convenient for adjusting the feeding speed, thereby reducing the quality of screening and filtration. In addition, the prior art is not convenient for replacing the screen and mixing rubber additives of different sizes, which reduces practicality. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a new type of environmentally friendly rubber additive filtering device which is convenient for filtering and screening environmentally friendly rubber additives of different diameters, improves practicality, and is convenient for adjusting the feeding speed to improve the quality of screening and filtration.

[0006] The utility model discloses a novel environmentally friendly rubber additive filtering device, comprising a main body mechanism; further comprising a speed control mechanism, a screening mechanism, a driving mechanism and an installation mechanism, wherein the speed control mechanism is installed at the top of the main body mechanism, the screening mechanism is slidably installed in the main body mechanism, the driving mechanism is installed inside the main body mechanism, and the installation mechanism is installed in the screening mechanism, the screening mechanism is conveniently replaced through the main body mechanism, the speed control mechanism is conveniently used to adjust the feeding speed of the environmentally friendly rubber additive, the driving mechanism drives the screening mechanism to screen and filter the environmentally friendly rubber additive, and the installation mechanism is conveniently used to replace the screening mechanism; the screening mechanism is conveniently replaced through the main body mechanism, and then it is convenient to filter and screen environmentally friendly rubber additives of different diameters, the speed control mechanism is conveniently used to adjust the feeding speed of the environmentally friendly rubber additive, and improve the screening quality, the driving mechanism drives the screening mechanism to screen and filter the environmentally friendly rubber additive, and the installation mechanism is conveniently used to replace the screening mechanism, and improves practicality and convenience.

[0007] Preferably, the main body structure includes a base plate, a filter box, a sealing door, a hinge and a locking plate. The filter box is installed on the top of the base plate, the sealing door is rotatably installed on the side wall of the filter box through a hinge, and the locking plate is rotatably installed on the filter box. When the filter box needs to be replaced and repaired, the locking plate is rotated and then the sealing door is opened to repair the filter box, thereby improving convenience.

[0008] Preferably, the speed control mechanism includes a feeding barrel, a fixed feeding plate, a rotating feeding plate, a bevel gear ring and a bevel gear. The feeding barrel is installed on the top of the filter box, the fixed feeding plate is installed on the inner wall of the feeding barrel, and the rotating feeding plate is rotatably installed on the inner wall of the feeding barrel. Both the fixed feeding plate and the rotating feeding plate are provided with feeding holes, the bevel gear ring is installed on the top of the rotating feeding plate, and the bevel gear is rotatably installed on the inner wall of the feeding barrel through a rotating shaft, and the bevel gear ring and the bevel gear are meshed. When the feeding speed needs to be adjusted, the bevel gear is driven to rotate by the rotating shaft of the rotating bevel gear, and then the rotating feeding plate is driven to rotate through the meshing relationship, and then the feeding speed is adjusted by the overlapping size of the feeding holes of the rotating feeding plate and the fixed feeding plate, thereby improving the quality of screening and filtration.

[0009] Preferably, the screening mechanism includes a screening box, multiple mounting plates and multiple sieve plates, the screening box is slidably mounted on the top of the bottom plate, the mounting plate is mounted on the side wall of the screening box, a slide groove is provided on the mounting plate, a slider is provided on the sieve plate, the slider of the sieve plate is slidably mounted in the slide groove of the mounting plate, and multiple sieve plates are provided with sieve holes with different belts; the slider of the sieve plate is slidably mounted in the slide groove of the mounting plate, which facilitates the installation of the sieve plate and improves convenience. When the environmentally friendly rubber additive falls onto the sieve plate, the driving mechanism is opened to drive the screening box to slide on the top of the bottom plate, and then the environmentally friendly rubber additive is screened through the sieve plates with different sieve hole sizes.

[0010] Preferably, the driving mechanism includes a first connecting rod, a connecting block, a second connecting rod, a mounting frame, a turntable, an eccentric shaft, a third connecting rod and a motor, one end of the first connecting rod is rotatably mounted on the inner wall of the bottom plate, the connecting block is rotatably mounted on the other end of the first connecting rod, one end of the second connecting rod is rotatably mounted on the connecting block, the other end of the second connecting rod is rotatably mounted on the side wall of the screening box, the mounting frame is mounted on the inner wall of the bottom plate, the turntable is rotatably mounted on the top end of the mounting frame, the eccentric shaft is eccentrically mounted on the top end of the turntable, one end of the third connecting rod is rotatably mounted on the eccentric shaft, the other end of the third connecting rod One end is rotatably installed on the connecting block, the motor is installed at the bottom of the mounting frame, and the output end of the motor is connected to the turntable; the slider of the sieve plate is slidably installed in the slide groove of the mounting plate, which is convenient for installing the sieve plate and improves convenience. When the environmentally friendly rubber additive falls onto the sieve plate, the turntable is driven to rotate by turning on the motor, and then the eccentric rotation of the eccentric shaft drives the third connecting rod to push the connecting block, and then the angles of the first connecting rod and the second connecting rod are adjusted, so that the screening box slides on the top of the bottom plate, and then the environmentally friendly rubber additive is screened through the sieve plates with different sieve hole sizes.

[0011] Preferably, the mounting mechanism comprises a sliding rod, a telescopic rod, a slider, a spring, a fourth connecting rod and a locking pin, a chamber is provided in the mounting plate, a sliding groove is provided in the chamber of the mounting plate, the sliding rod is slidably mounted on the side wall of the mounting plate, one end of the sliding rod is connected to the inner wall of the chamber of the mounting plate through the telescopic rod, the sliding block is slidably mounted in the sliding groove in the mounting plate, the sliding block is mounted on the sliding rod, one end of the spring is mounted on the telescopic rod, and the other end of the spring is mounted on the sliding block, one end of the fourth connecting rod is rotatably mounted on the sliding block, the locking pin is rotatably mounted on the other end of the fourth connecting rod, the locking pin is slidably mounted on the side wall of the chamber of the mounting plate, and a locking hole is provided on the sieve plate; when the sieve plate is to be replaced and installed, the sliding rod is first pushed to cause the telescopic rod to contract, and then the spring contracts, and then the locking pin is pulled out through the fourth connecting rod, and then the sieve plate is slidably mounted in the mounting plate, and when the locking pin is aligned with the locking hole of the sieve plate, the sliding rod is released, and the slider is pushed to slide in the sliding groove by the elasticity of the spring, and then the locking pin is pushed into the locking hole of the sieve plate through the fourth connecting rod, thereby completing the replacement and installation of the sieve plate.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the screening mechanism can be easily replaced through the main mechanism, thereby facilitating the filtering and screening of environmentally friendly rubber additives of different diameters; the speed control mechanism can facilitate the adjustment of the feeding speed of the environmentally friendly rubber additives, thereby improving the screening quality; the driving mechanism drives the screening mechanism to screen and filter the environmentally friendly rubber additives; the installation mechanism facilitates the replacement of the screening mechanism, thereby improving practicality and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a first axonometric structural schematic diagram of the utility model;

[0014] Figure 2 It is a second axonometric structural schematic diagram of the utility model;

[0015] Figure 3 It is a first top view cross-sectional structural schematic diagram of the utility model;

[0016] Figure 4 It is a second top view cross-sectional structural schematic diagram of the utility model;

[0017] Figure 5 It is a front cross-sectional structural schematic diagram of the utility model;

[0018] Figure 6 The utility model Figure 5 A schematic diagram of the enlarged structure at A in the middle;

[0019] Markings in the attached drawings: 01, main body; 11, bottom plate; 12, filter box; 13, sealing door; 14, hinge; 15, lock plate; 02, speed control mechanism; 21, loading barrel; 22, fixed feeding plate; 23, rotating feeding plate; 24, bevel gear ring; 25, bevel gear; 03, screening mechanism; 31, screening box; 32, mounting plate; 33, sieve plate; 04, driving mechanism; 41, first connecting rod; 42, connecting block; 43, second connecting rod; 44, mounting frame; 45, turntable; 46, eccentric shaft; 47, third connecting rod; 48, motor; 05, mounting mechanism; 51, sliding rod; 52, telescopic rod; 53, slider; 54, spring; 55, fourth connecting rod; 56, locking pin. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0021] Example 1

[0022] like Figure 1 , Figure 2 and Figure 6 As shown, it includes a main body mechanism 01, a speed control mechanism 02, a screening mechanism 03, a driving mechanism 04 and a mounting mechanism 05, wherein the speed control mechanism 02 is mounted on the top of the main body mechanism 01, the screening mechanism 03 is slidably mounted in the main body mechanism 01, the driving mechanism 04 is mounted inside the main body mechanism 01, and the mounting mechanism 05 is mounted in the screening mechanism 03;

[0023] The main body mechanism 01 facilitates the replacement of the screening mechanism 03, the speed control mechanism 02 facilitates the adjustment of the feeding speed of the environmentally friendly rubber additive, the driving mechanism 04 drives the screening mechanism 03 to screen and filter the environmentally friendly rubber additive, and the installation mechanism 05 facilitates the replacement of the screening mechanism 03;

[0024] The main body 01 includes a bottom plate 11, a filter box 12, a sealing door 13, a hinge 14 and a locking plate 15. The filter box 12 is mounted on the top of the bottom plate 11. The sealing door 13 is rotatably mounted on the side wall of the filter box 12 through the hinge 14. The locking plate 15 is rotatably mounted on the filter box 12.

[0025] The speed control mechanism 02 includes a feeding barrel 21, a fixed feeding plate 22, a rotating feeding plate 23, a bevel gear ring 24 and a bevel gear 25. The feeding barrel 21 is installed at the top of the filter box 12, the fixed feeding plate 22 is installed on the inner wall of the feeding barrel 21, the rotating feeding plate 23 is rotatably installed on the inner wall of the feeding barrel 21, the fixed feeding plate 22 and the rotating feeding plate 23 are both provided with feeding holes, the bevel gear ring 24 is installed on the top of the rotating feeding plate 23, the bevel gear 25 is rotatably installed on the inner wall of the feeding barrel 21 through a rotating shaft, and the bevel gear ring 24 and the bevel gear 25 are meshed;

[0026] When the filter box 12 needs to be replaced and repaired, the locking plate 15 is turned and then the sealing door 13 is opened to repair the filter box 12, thereby improving convenience. When the feeding speed needs to be adjusted, the rotating shaft of the bevel gear 25 drives the bevel gear 25 to rotate, and then drives the rotating feed plate 23 to rotate through the meshing relationship, and then the feeding speed is adjusted by the overlapping size of the feed holes of the rotating feed plate 23 and the fixed feed plate 22, thereby improving the quality of screening and filtration. The driving mechanism 04 drives the screening mechanism 03 to screen and filter the environmentally friendly rubber additives, and the mounting mechanism 05 facilitates the replacement of the screening mechanism 03, thereby improving practicality and convenience.

[0027] Example 2

[0028] like Figures 3 to 5 As shown, it includes a main body mechanism 01, a speed control mechanism 02, a screening mechanism 03, a driving mechanism 04 and a mounting mechanism 05, wherein the speed control mechanism 02 is mounted on the top of the main body mechanism 01, the screening mechanism 03 is slidably mounted in the main body mechanism 01, the driving mechanism 04 is mounted inside the main body mechanism 01, and the mounting mechanism 05 is mounted in the screening mechanism 03;

[0029] The main body mechanism 01 facilitates the replacement of the screening mechanism 03, the speed control mechanism 02 facilitates the adjustment of the feeding speed of the environmentally friendly rubber additive, the driving mechanism 04 drives the screening mechanism 03 to screen and filter the environmentally friendly rubber additive, and the installation mechanism 05 facilitates the replacement of the screening mechanism 03;

[0030] The screening mechanism 03 includes a screening box 31, a plurality of mounting plates 32 and a plurality of sieve plates 33. The screening box 31 is slidably mounted on the top of the bottom plate 11. The mounting plate 32 is mounted on the side wall of the screening box 31. A slide groove is provided on the mounting plate 32. A slider is provided on the sieve plate 33. The slider of the sieve plate 33 is slidably mounted in the slide groove of the mounting plate 32. The plurality of sieve plates 33 are provided with sieve holes with different bands.

[0031] The driving mechanism 04 includes a first connecting rod 41, a connecting block 42, a second connecting rod 43, a mounting frame 44, a rotating disk 45, an eccentric shaft 46, a third connecting rod 47 and a motor 48. One end of the first connecting rod 41 is rotatably mounted on the inner wall of the base plate 11, the connecting block 42 is rotatably mounted on the other end of the first connecting rod 41, one end of the second connecting rod 43 is rotatably mounted on the connecting block 42, the other end of the second connecting rod 43 is rotatably mounted on the side wall of the screening box 31, the mounting frame 44 is mounted on the inner wall of the base plate 11, the rotating disk 45 is rotatably mounted on the top of the mounting frame 44, the eccentric shaft 46 is eccentrically mounted on the top of the rotating disk 45, one end of the third connecting rod 47 is rotatably mounted on the eccentric shaft 46, the other end of the third connecting rod 47 is rotatably mounted on the connecting block 42, the motor 48 is mounted on the bottom end of the mounting frame 44, and the output end of the motor 48 is connected to the rotating disk 45;

[0032] The mounting mechanism 05 includes a sliding rod 51, a telescopic rod 52, a slider 53, a spring 54, a fourth connecting rod 55 and a locking pin 56. A chamber is provided in the mounting plate 32, and a slide groove is provided in the chamber of the mounting plate 32. The sliding rod 51 is slidably mounted on the side wall of the mounting plate 32, one end of the sliding rod 51 is connected to the inner wall of the chamber of the mounting plate 32 through the telescopic rod 52, the slider 53 is slidably mounted in the slide groove in the mounting plate 32, the slider 53 is mounted on the sliding rod 51, one end of the spring 54 is mounted on the telescopic rod 52, and the other end of the spring 54 is mounted on the slider 53, one end of the fourth connecting rod 55 is rotatably mounted on the slider 53, and the locking pin 56 is rotatably mounted on the other end of the fourth connecting rod 55. The locking pin 56 is slidably mounted on the side wall of the chamber of the mounting plate 32, and a lock hole is provided on the sieve plate 33;

[0033] The main body mechanism 01 facilitates the replacement of the screening mechanism 03, thereby facilitating the filtering and screening of environmentally friendly rubber additives of different diameters. The speed control mechanism 02 facilitates the adjustment of the feeding speed of the environmentally friendly rubber additives, thereby improving the screening quality. The slider of the screen plate 33 is slidably installed in the slide groove of the mounting plate 32, thereby facilitating the installation of the screen plate 33, thereby improving the convenience. When the environmentally friendly rubber additive falls onto the screen plate 33, the motor 48 is turned on to drive the turntable 45 to rotate, thereby driving the third connecting rod 47 to push the connecting block 42 through the eccentric rotation of the eccentric shaft 46, thereby adjusting the angles of the first connecting rod 41 and the second connecting rod 43, thereby making The screening box 31 slides on the top of the bottom plate 11, and then screens the environmentally friendly rubber additive through the screen plates 33 with different screen hole sizes. When the screen plate 33 needs to be replaced and installed, the sliding rod 51 is first pushed to shrink the telescopic rod 52, and then the spring 54 is contracted, and then the locking pin 56 is pulled out through the fourth connecting rod 55, and then the screen plate 33 is slid and installed in the mounting plate 32. When the locking pin 56 is aligned with the locking hole of the screen plate 33, the sliding rod 51 is released, and the elasticity of the spring 54 pushes the slider 53 to slide in the slide groove, and then the locking pin 56 is pushed into the locking hole of the screen plate 33 through the fourth connecting rod 55, thereby completing the replacement and installation of the screen plate 33.

[0034] like Figures 1 to 6As shown, the utility model is a novel environmentally friendly rubber additive filtering device. When it is working, when the filter box 12 needs to be replaced and repaired, the sealing door 13 is opened by rotating the lock plate 15, and the filter box 12 is repaired to improve convenience. When the feeding speed needs to be adjusted, the rotating shaft of the bevel gear 25 drives the bevel gear 25 to rotate, and then drives the rotating feed plate 23 to rotate through the meshing relationship, and then the feeding speed is adjusted by the overlapping size of the feed holes of the rotating feed plate 23 and the fixed feed plate 22, so as to improve the quality of screening and filtration. The slider of the sieve plate 33 is slidably installed in the slide groove of the mounting plate 32, so as to facilitate the installation of the sieve plate 33 and improve convenience. When the environmentally friendly rubber additive falls on the sieve plate 33, the turntable 45 is driven to rotate by turning on the motor 48, and then through The eccentric rotation of the eccentric shaft 46 drives the third connecting rod 47 to push the connecting block 42, thereby adjusting the angles of the first connecting rod 41 and the second connecting rod 43, so that the screening box 31 slides on the top of the bottom plate 11, and then the environmentally friendly rubber additives are screened through the sieve plates 33 with different sieve hole sizes. When the sieve plate 33 is to be replaced and installed, the sliding rod 51 is first pushed to shrink the telescopic rod 52, and then the spring 54 shrinks, and then the locking pin 56 is pulled out through the fourth connecting rod 55, and then the sieve plate 33 is slid and installed in the mounting plate 32. When the locking pin 56 is aligned with the locking hole of the sieve plate 33, the sliding rod 51 is released, and the slider 53 is pushed to slide in the slide groove by the elasticity of the spring 54, and then the locking pin 56 is pushed into the locking hole of the sieve plate 33 through the fourth connecting rod 55, thereby completing the replacement and installation of the sieve plate 33.

[0035] The motor 48 of the utility model is purchased on the market, and technicians in the industry only need to install and operate it according to the accompanying instruction manual, without the need for technicians in the field to make creative efforts.

[0036] The main functions achieved by the utility model are: in the filtering process of the new environmentally friendly rubber additive, it is convenient to filter and screen the environmentally friendly rubber additives of different diameters, thereby improving practicality, and it is convenient to adjust the feeding speed, thereby improving the quality of screening and filtering.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A novel environmentally friendly rubber additive filtering device, comprising a main body (01); characterized in that: It also includes a speed control mechanism (02), a screening mechanism (03), a driving mechanism (04) and a mounting mechanism (05), wherein the speed control mechanism (02) is mounted on the top of the main mechanism (01), the screening mechanism (03) is slidably mounted in the main mechanism (01), the driving mechanism (04) is mounted inside the main mechanism (01), and the mounting mechanism (05) is mounted in the screening mechanism (03); The main body mechanism (01) facilitates replacement of the screening mechanism (03); the speed control mechanism (02) facilitates adjustment of the feeding speed of the environmentally friendly rubber additive; the driving mechanism (04) drives the screening mechanism (03) to screen and filter the environmentally friendly rubber additive; and the installation mechanism (05) facilitates replacement of the screening mechanism (03).

2. A novel environmentally friendly rubber additive filtering device as claimed in claim 1, characterized in that: The main body mechanism (01) comprises a base plate (11), a filter box (12), a sealing door (13), a hinge (14) and a locking plate (15); the filter box (12) is mounted on the top of the base plate (11); the sealing door (13) is rotatably mounted on the side wall of the filter box (12) via the hinge (14); and the locking plate (15) is rotatably mounted on the filter box (12).

3. A novel environmentally friendly rubber additive filtering device as claimed in claim 2, characterized in that: The speed control mechanism (02) comprises a feeding barrel (21), a fixed feeding plate (22), a rotating feeding plate (23), a bevel gear ring (24) and a bevel gear (25). The feeding barrel (21) is mounted on the top of the filter box (12), the fixed feeding plate (22) is mounted on the inner wall of the feeding barrel (21), the rotating feeding plate (23) is rotatably mounted on the inner wall of the feeding barrel (21), the fixed feeding plate (22) and the rotating feeding plate (23) are both provided with feeding holes, the bevel gear ring (24) is mounted on the top of the rotating feeding plate (23), the bevel gear (25) is rotatably mounted on the inner wall of the feeding barrel (21) via a rotating shaft, and the bevel gear ring (24) and the bevel gear (25) are meshed.

4. A novel environmentally friendly rubber additive filtering device as claimed in claim 2, characterized in that: The screening mechanism (03) comprises a screening box (31), a plurality of mounting plates (32) and a plurality of sieve plates (33); the screening box (31) is slidably mounted on the top of the bottom plate (11); the mounting plate (32) is mounted on the side wall of the screening box (31); a slide groove is arranged on the mounting plate (32); a slider is arranged on the sieve plate (33); the slider of the sieve plate (33) is slidably mounted in the slide groove of the mounting plate (32); and sieve holes with different bands are arranged on the plurality of sieve plates (33).

5. A novel environmentally friendly rubber additive filtering device as claimed in claim 2, characterized in that: The driving mechanism (04) comprises a first connecting rod (41), a connecting block (42), a second connecting rod (43), a mounting frame (44), a rotating disk (45), an eccentric shaft (46), a third connecting rod (47) and a motor (48), wherein one end of the first connecting rod (41) is rotatably mounted on the inner wall of the base plate (11), the connecting block (42) is rotatably mounted on the other end of the first connecting rod (41), one end of the second connecting rod (43) is rotatably mounted on the connecting block (42), and the other end of the second connecting rod (43) is rotatably mounted on the base plate (11). The screen box (31) is mounted on the side wall of the screen box (31), the mounting frame (44) is mounted on the inner wall of the bottom plate (11), the turntable (45) is rotatably mounted on the top of the mounting frame (44), the eccentric shaft (46) is eccentrically mounted on the top of the turntable (45), one end of the third connecting rod (47) is rotatably mounted on the eccentric shaft (46), the other end of the third connecting rod (47) is rotatably mounted on the connecting block (42), the motor (48) is mounted on the bottom end of the mounting frame (44), and the output end of the motor (48) is connected to the turntable (45).

6. A novel environmentally friendly rubber additive filtering device as claimed in claim 4, characterized in that: The mounting mechanism (05) comprises a sliding rod (51), a telescopic rod (52), a slider (53), a spring (54), a fourth connecting rod (55) and a locking pin (56). A chamber is provided in the mounting plate (32), a slide groove is provided in the chamber of the mounting plate (32), the sliding rod (51) is slidably mounted on the side wall of the mounting plate (32), one end of the sliding rod (51) is connected to the inner wall of the chamber of the mounting plate (32) through the telescopic rod (52), and the slider (53) is slidably mounted on the inner wall of the chamber of the mounting plate (32). In the slide groove in the mounting plate (32), the slider (53) is mounted on the sliding rod (51), one end of the spring (54) is mounted on the telescopic rod (52), the other end of the spring (54) is mounted on the slider (53), one end of the fourth connecting rod (55) is rotatably mounted on the slider (53), the locking pin (56) is rotatably mounted on the other end of the fourth connecting rod (55), the locking pin (56) is slidably mounted on the side wall of the chamber of the mounting plate (32), and a locking hole is provided on the screen plate (33).

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