Air compressor equipped with air inlet drying device

Abstract

The utility model relates to the technical field of air compressors, in particular to an air compressor equipped with an air inlet drying device. A compressor is arranged at the top of the air storage tank, an air inlet is fixedly connected to the top of the compressor, an air dryer is arranged on one side of the air inlet, two first supporting frames are arranged at the bottom of the compressor, and the first supporting frames are fixedly connected with the air storage tank. Cylindrical blocks are fixedly connected to the two sides of the top of the first supporting frame. Under the matching action of the compressor, the air inlet, the air dryer, the first supporting frame, the first connecting block and the connector mechanism, the working process of replacing the air dryer by a user is simplified, and the problem that the air filter dryer is in threaded connection with the air inlet is solved; and when a user replaces the air filtering dryers, multiple air filtering dryers need to be rotated for multiple times, and the replacement process is complex.

Description

Technical Field

[0001] The utility model relates to the technical field related to air compressors, in particular to an air compressor equipped with an air inlet drying device. Background Art

[0002] A piston compressor is a compressor that relies on the reciprocating motion of the piston to pressurize and transport gas. It is a reciprocating piston compressor that mainly relies on the reciprocating motion of the connecting rod piston in the cylinder to compress and transport air.

[0003] The utility model patent with announcement number CN220248317U discloses an air compressor equipped with an air inlet drying device, which belongs to the technical field related to air compressors, and solves the problem that the air compressor in the prior art does not have a front air drying device, including an exhaust assembly connected to an air storage tank, and a compressor connected to an air storage tank, characterized in that the compressor is connected to an air filter dryer, and the air filter dryer filters and dries the external air before entering the compressor for compression. The utility model provides an air compressor equipped with an air inlet drying device by setting an air filter dryer to dry the air before entering the compressor, solving the technical problem that the existing air compressor does not have a front air drying device.

[0004] However, the above patent still has shortcomings: this patent filters and dries the external air through the air filter dryer before entering the compressor to be compressed. Since the filtering and drying effect of the internal filter material of the air filter dryer is reduced when the air filter dryer is used for a long time, the air filter dryer needs to be replaced regularly. However, the air filter dryer is connected to the air inlet by a threaded connection. When the user replaces the air filter dryer, the air filter dryer needs to be rotated multiple times, and the replacement process is relatively complicated. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides an air compressor equipped with an air inlet drying device to solve the problem raised in the above background technology that the filtering and drying effect of the internal filter material of the air filter dryer is reduced when the air filter dryer is used for a long time, and the air filter dryer needs to be replaced regularly. However, the air filter dryer is connected to the air inlet by a threaded connection. When the user replaces the air filter dryer, the air filter dryer needs to be rotated multiple times, and the replacement process is relatively complicated.

[0006] The technical solution of the utility model is:

[0007] An air compressor equipped with an air inlet drying device comprises: an air storage tank; a compressor is arranged on the top of the air storage tank, an air inlet is fixedly connected to the top of the compressor, an air dryer is arranged on one side of the air inlet, two first support frames are arranged on the bottom of the compressor, the first support frames are fixedly connected to the air storage tank, cylindrical blocks are fixedly connected to the two sides of the top of the first support frames, and the tops of the cylindrical blocks are fixedly connected to the compressor; a joint mechanism for convenient disassembly and assembly of the air dryer is arranged at the air inlet near the air dryer; a moving mechanism with a buffering function is arranged at the bottom of the air storage tank.

[0008] Preferably, the joint mechanism includes: a joint body is fixedly connected to the side of the air inlet close to the air dryer, the joint body is sleeved on the outer surface of one end of the air dryer, a plurality of ball grooves are evenly opened inside the joint body, steel balls are arranged inside the ball grooves, an extrusion ring is slidably connected to the joint body close to the steel balls, a connecting ring is fixedly connected to the outer surface of the extrusion ring, and a force ring is fixedly connected to the outer surface of the connecting ring; a movable groove is opened on the inner wall of the extrusion ring, a clamping groove is opened on the outer surface of the air dryer close to the steel balls, and the movable groove and the clamping groove are both adapted to the steel balls.

[0009] Preferably, a first spring is provided at one end of the extrusion ring, and the first spring is arranged inside the joint body.

[0010] Preferably, the joint body is fixedly connected to a limit ring near the air dryer, a sealing gasket is provided between the limit ring and the air dryer, and the sealing gasket is fixedly connected to the limit ring.

[0011] Preferably, a travel groove is formed on the joint body near the connecting ring, and a first damping pad is fixedly connected to the outer surface of the force ring.

[0012] Preferably, the moving mechanism includes: second support frames are fixedly connected to both sides of the bottom of the gas storage tank, a first rotating shaft is provided at the bottom of the second support frame, and the outer surfaces of both ends of the first rotating shaft are rotatably connected to first connecting blocks, and the first connecting blocks are respectively fixedly connected to the second support frame; rotating sleeves are provided on the opposite sides of the two first connecting blocks, and the rotating sleeves are respectively rotatably connected to the first rotating shaft, and moving wheels are provided on the outer sides of the rotating sleeves; the moving wheels and the rotating sleeves are connected by four groups of buffer mechanisms.

[0013] Preferably, the buffer mechanism includes: four sleeves are evenly arranged between the moving wheel and the rotating sleeve, the interiors of the sleeves are slidably connected to a limiting plate, one end of the limiting plate is fixedly connected to a buffer rod, the end of the buffer rod away from the limiting plate passes through the sleeve and extends to the first ring sleeve, the first ring sleeve is fixedly connected to the limiting plate, and the end of the sleeve close to the moving wheel is fixedly connected to the second ring sleeve; the interior of the first ring sleeve is rotatably connected to a second rotating shaft, both ends of the second rotating shaft are fixedly connected to second connecting blocks, the second connecting blocks are fixedly connected to the rotating sleeve, the interior of the second ring sleeve is rotatably connected to a third rotating shaft, both ends of the third rotating shaft are fixedly connected to a third connecting block, and the third connecting block is fixedly connected to the moving wheel.

[0014] Preferably, second springs are provided on both sides of the limit plate, the second springs are respectively provided inside the sleeve, and a second damping pad is fixedly connected to the outer surface of the limit plate, and the second damping pad cooperates with the second spring.

[0015] Preferably, outer surfaces of the moving wheels are provided with rubber pads, and the rubber pads are fixedly connected to the moving wheels respectively.

[0016] Preferably, a third support frame is fixedly connected to a side of the gas storage tank away from the first support frame, a push rod is fixedly connected to the top of the third support frame, and a silicone pad is fixedly connected to the middle outer surface of the push rod.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] Firstly, the utility model simplifies the workflow of users replacing the air dryer through the cooperation of the compressor, the air inlet, the air dryer, the first support frame, the first connecting block and the joint mechanism, and solves the problem that the air filter dryer is connected to the air inlet by a threaded connection, and when the user replaces the air filter dryer, the air filter dryer needs to be rotated multiple times, resulting in a relatively complicated replacement process.

[0019] Secondly, the utility model facilitates the user to move the air compressor through the cooperation of the compressor, the air inlet, the air dryer, the first support frame, the first connecting block and the moving mechanism, and can buffer the vibration generated by the movement of the air compressor and the vibration generated when the air compressor is running, thereby improving the practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of an air compressor equipped with an air inlet drying device of the utility model;

[0021] Figure 2This is a schematic diagram of the connection structure between the second support frame and the gas storage tank of the utility model;

[0022] Figure 3 This is a schematic diagram of the joint mechanism structure of the utility model;

[0023] Figure 4 For the utility model Figure 3 The enlarged structural diagram at A in the middle;

[0024] Figure 5 This is a schematic diagram of the structure of the mobile mechanism of the utility model;

[0025] Figure 6 For the utility model Figure 5 Enlarged structural diagram at B in the middle.

[0026] In the figure:

[0027] 1. Gas tank; 2. Compressor; 3. Air inlet; 4. Air dryer; 5. First support frame; 6. Cylindrical block; 7. Joint body; 8. Ball groove; 9. Steel ball; 10. Extrusion ring; 11. Connecting ring; 12. Force ring; 13. Movable groove; 14. Clamping groove; 15. First spring; 16. Limiting ring; 17. Sealing pad; 18. Travel groove; 19. First damping pad; 20. Second support frame; 21. First rotating shaft; 22. First connecting block ; 23. Rotating sleeve; 24. Moving wheel; 25. Buffer mechanism; 26. Sleeve; 27. Limiting plate; 28. Buffer rod; 29. ​​First ring sleeve; 30. Second ring sleeve; 31. Second rotating shaft; 32. Second connecting block; 33. Third rotating shaft; 34. Third connecting block; 35. Second spring; 36. Second damping pad; 37. Rubber pad; 38. Third support frame; 39. Push rod; 40. Silicone pad; 41. Moving mechanism; 42. Joint mechanism. DETAILED DESCRIPTION

[0028] 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 described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0029] See also Figures 1 to 6 The utility model describes the above technical solution in detail through the following embodiments:

[0030] An air compressor equipped with an air inlet drying device comprises: an air storage tank 1; a compressor 2 is arranged on the top of the air storage tank 1, an air inlet 3 is fixedly connected to the top of the compressor 2, an air dryer 4 is arranged on one side of the air inlet 3, and two first support frames 5 are arranged on the bottom of the compressor 2, the first support frames 5 are fixedly connected to the air storage tank 1, cylindrical blocks 6 are fixedly connected to the tops of the first support frames 5 on both sides, and the tops of the cylindrical blocks 6 are fixedly connected to the compressor 2; a joint mechanism 42 for convenient disassembly and assembly of the air dryer 4 is arranged near the air inlet 3; a buffer is arranged at the bottom of the air storage tank 1 The functional moving mechanism 41 allows the user to quickly replace the air dryer 4 through the connecting mechanism 42, which simplifies the user's work flow for replacing the air dryer 4 and solves the problem that the air filter dryer is connected to the air inlet by a threaded connection. When the user replaces the air filter dryer, the air filter dryer needs to be rotated multiple times, resulting in a complicated replacement process. The setting of the moving mechanism 41 makes it convenient for the user to move the air compressor, and can buffer the vibration generated by the air compressor when it is moved and the vibration generated when the air compressor is running, thereby improving practicality.

[0031] like Figure 3 and Figure 4 As shown, the joint mechanism 42 includes: a joint body 7 is fixedly connected to one side of the air inlet 3 near the air dryer 4, the joint body 7 is sleeved on the outer surface of one end of the air dryer 4, a plurality of ball grooves 8 are evenly opened inside the joint body 7, and steel balls 9 are arranged inside the ball grooves 8, an extrusion ring 10 is slidably connected to the joint body 7 near the steel balls 9, a connecting ring 11 is fixedly connected to the outer surface of the extrusion ring 10, and a force ring 12 is fixedly connected to the outer surface of the connecting ring 11; a movable groove 13 is opened on the inner wall of the extrusion ring 10, and a clamping groove 14 is opened on the outer surface of the air dryer 4 near the steel balls 9, and the movable groove 13 and the clamping groove 14 are both adapted to the steel balls 9 When replacing the air dryer 4, the user pulls the force ring 12, the force ring 12 drives the connecting ring 11, and the connecting ring 11 drives the extrusion ring 10, so that the movable groove 13 on the extrusion ring 10 moves to the ball groove 8, increasing the movable range of the steel ball 9. Then the user pulls out the air dryer 4 from the inside of the joint body 7 and replaces it with a new air dryer 4. When the force ring 12 is released, the extrusion ring 10 is reset. The resetting of the extrusion ring 10 drives the movable groove 13 to separate from the ball groove 8 and squeeze the steel ball 9, so that a small part of the steel ball 9 moves to the inside of the card groove 14 on the surface of the air dryer 4, and the air dryer 4 is engaged.

[0032] like Figure 3As shown, a first spring 15 is provided at one end of the extrusion ring 10 . The first spring 15 is provided inside the joint body 7 . When the user releases the force ring 12 , the first spring 15 can push the extrusion ring 10 to reset through its own elastic recovery.

[0033] like Figure 3 As shown, the joint body 7 is fixedly connected to a limit ring 16 near the air dryer 4, a sealing gasket 17 is provided between the limit ring 16 and the air dryer 4, and the sealing gasket 17 is fixedly connected to the limit ring 16, thereby improving the sealing performance of the connection between the air dryer 4 and the joint body 7 and avoiding air leakage.

[0034] like Figure 4 As shown, a travel groove 18 is provided near the connecting ring 11 of the joint body 7, and a first damping pad 19 is fixedly connected to the outer surface of the force ring 12, thereby increasing the friction force on the surface of the force ring 12 and limiting the moving stroke of the extrusion ring 10 by limiting the moving stroke of the connecting ring 11.

[0035] like Figure 1 and Figure 2 As shown, the moving mechanism 41 includes: the second support frame 20 is fixedly connected to both sides of the bottom of the gas storage tank 1, the bottom of the second support frame 20 is provided with a first rotating shaft 21, the outer surfaces of both ends of the first rotating shaft 21 are rotatably connected with the first connecting blocks 22, and the first connecting blocks 22 are respectively fixedly connected to the second support frame 20; a rotating sleeve 23 is provided on the opposite side of the two first connecting blocks 22, the rotating sleeves 23 are respectively rotatably connected to the first rotating shaft 21, and the outer sides of the rotating sleeves 23 are provided with moving wheels 24; the moving wheels 24 and the rotating sleeves 23 are connected by four groups of buffer mechanisms 25. When the gas storage tank 1 moves, it drives the second support frame 20, the second support frame 20 drives the first connecting block 22, the first connecting block 22 drives the first rotating shaft 21, the first rotating shaft 21 drives the rotating sleeve 23, and the rotating sleeve 23 drives the moving wheel 24 through the buffer mechanism 25, so as to facilitate the user to move the air compressor.

[0036] like Figure 6As shown, the buffer mechanism 25 includes: four sleeves 26 are evenly arranged between the moving wheel 24 and the rotating sleeve 23, the interior of the sleeve 26 is slidably connected to the limit plate 27, one end of the limit plate 27 is fixedly connected to the buffer rod 28, the end of the buffer rod 28 away from the limit plate 27 passes through the sleeve 26 and extends to the first ring sleeve 29, the first ring sleeve 29 is fixedly connected to the limit plate 27, and the end of the sleeve 26 close to the moving wheel 24 is fixedly connected to the second ring sleeve 30; the interior of the first ring sleeve 29 is rotatably connected to the second rotating shaft 31, both ends of the second rotating shaft 31 are fixedly connected to the second connecting blocks 32, the second connecting blocks 32 are fixedly connected to the rotating sleeve 23, the interior of the second ring sleeve 30 is rotatably connected to the third rotating shaft 33, and the third Both ends of the rotating shaft 33 are fixedly connected with a third connecting block 34, and the third connecting block 34 is fixedly connected to the moving wheel 24. When the air compressor moves or vibrates during operation, the gas storage tank 1 squeezes the first rotating shaft 21 through the second support frame 20 and the first connecting block 22, and the first rotating shaft 21 drives the rotating sleeve 23, and the rotating sleeve 23 drives the second connecting block 32. The second connecting block 32 drives the first ring sleeve 29 through the second rotating shaft 31, and the first ring sleeve 29 drives the buffer rod 28, and the buffer rod 28 drives the limit plate 27 to slide inside the sleeve 26. The sleeve 26 rotates slightly with the third rotating shaft 33 as the center through the cooperation of the second ring sleeve 30, the third rotating shaft 33 and the third connecting block 34, thereby buffering the air compressor.

[0037] like Figure 5 and Figure 6 As shown, second springs 35 are provided on both sides of the limit plate 27, and the second springs 35 are respectively provided inside the sleeve 26. A second damping pad 36 is fixedly connected to the outer surface of the limit plate 27, and the second damping pad 36 cooperates with the second spring 35. The limit plate 27 squeezes the second spring 35 while sliding inside the sleeve 26. The second spring 35 buffers the air compressor through its own elasticity, and the setting of the second damping pad 36 can relieve the rebound force generated by the second spring 35.

[0038] like Figure 5 As shown, the outer surfaces of the moving wheels 24 are provided with rubber pads 37, and the rubber pads 37 are fixedly connected to the moving wheels 24, respectively, so as to further improve the buffering effect of the air compressor.

[0039] like Figure 6 As shown, a third support frame 38 is fixedly connected to one side of the gas tank 1 away from the first support frame 5, a push rod 39 is fixedly connected to the top of the third support frame 38, and a silicone pad 40 is fixedly connected to the middle outer surface of the push rod 39. The user can push the push rod 39, and the push rod 39 pushes the gas tank 1 through the third support frame 38. The setting of the silicone pad 40 improves the comfort of the user holding the push rod 39.

[0040] Working principle: When replacing the air dryer 4, the user pulls the force ring 12, the force ring 12 drives the connecting ring 11, and the connecting ring 11 drives the extrusion ring 10, so that the movable groove 13 on the extrusion ring 10 moves to the ball groove 8, increasing the movable range of the steel ball 9. Then the user pulls out the air dryer 4 from the inside of the joint body 7 and replaces it with a new air dryer 4. The first spring 15 of the force ring 12 is released and pushes the extrusion ring 10 to reset through its own elastic recovery. The resetting of the extrusion ring 10 drives the movable groove 13 to separate from the ball groove 8 and squeeze the steel ball 9, so that a small part of the steel ball 9 moves to the inside of the card groove 14 on the surface of the air dryer 4, and the air dryer 4 can be engaged.

[0041] The user can push the push rod 39, and the push rod 39 pushes the gas tank 1 through the third support frame 38. The setting of the silicone pad 40 improves the comfort of the user holding the push rod 39. When the gas tank 1 moves, it drives the second support frame 20, the second support frame 20 drives the first connecting block 22, the first connecting block 22 drives the first rotating shaft 21, the first rotating shaft 21 drives the rotating sleeve 23, and the rotating sleeve 23 drives the moving wheel 24 through the buffer mechanism 25, so as to facilitate the user to move the air compressor. When the air compressor moves or vibrates during operation, the gas tank 1 squeezes the first rotating shaft 21 through the second support frame 20 and the first connecting block 22, and the first rotating shaft 21 drives the rotating sleeve 23. The rotating sleeve 23 drives the second connecting block 32, and the second connecting block 32 drives the first ring sleeve 29 through the second rotating shaft 31. The first ring sleeve 29 drives the buffer rod 28, and the buffer rod 28 drives the limit plate 27 to slide inside the sleeve 26. The limit plate 27 squeezes the second spring 35 while sliding inside the sleeve 26. The second spring 35 buffers the air compressor through its own elasticity, and the setting of the second damping pad 36 can relieve the force and buffer the rebound force generated by the second spring 35. The sleeve 26 rotates slightly with the third rotating shaft 33 as the center through the cooperation of the second ring sleeve 30, the third rotating shaft 33 and the third connecting block 34, thereby buffering the air compressor.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An air compressor equipped with an air inlet drying device, comprising: Gas tank (1); The invention is characterized in that a compressor (2) is arranged on the top of the gas storage tank (1), an air inlet (3) is fixedly connected to the top of the compressor (2), an air dryer (4) is arranged on one side of the air inlet (3), two first support frames (5) are arranged on the bottom of the compressor (2), the first support frames (5) are fixedly connected to the gas storage tank (1), cylindrical blocks (6) are fixedly connected to both sides of the top of the first support frames (5), and the tops of the cylindrical blocks (6) are fixedly connected to the compressor (2); The air inlet (3) is provided with a joint mechanism (42) near the air dryer (4) for facilitating the disassembly and assembly of the air dryer (4); The bottom of the gas storage tank (1) is provided with a moving mechanism (41) having a buffering function.

2. An air compressor equipped with an air inlet drying device according to claim 1, characterized in that: The joint mechanism (42) comprises: A joint body (7) is fixedly connected to a side of the air inlet (3) close to the air dryer (4); the joint body (7) is sleeved on the outer surface of one end of the air dryer (4); a plurality of ball grooves (8) are evenly arranged inside the joint body (7); steel balls (9) are arranged inside the ball grooves (8); an extrusion ring (10) is slidably connected to the joint body (7) close to the steel balls (9); a connecting ring (11) is fixedly connected to the outer surface of the extrusion ring (10); and a force ring (12) is fixedly connected to the outer surface of the connecting ring (11); The inner wall of the extrusion ring (10) is provided with a movable groove (13), and the outer surface of the air dryer (4) near the steel ball (9) is provided with a clamping groove (14), and both the movable groove (13) and the clamping groove (14) are adapted to the steel ball (9).

3. An air compressor equipped with an air inlet drying device as claimed in claim 2, characterized in that: A first spring (15) is provided at one end of the extrusion ring (10), and the first spring (15) is arranged inside the joint body (7).

4. An air compressor equipped with an air inlet drying device as claimed in claim 2, characterized in that: The joint body (7) is fixedly connected to a limit ring (16) near the air dryer (4), a sealing gasket (17) is provided between the limit ring (16) and the air dryer (4), and the sealing gasket (17) is fixedly connected to the limit ring (16).

5. An air compressor equipped with an air inlet drying device as claimed in claim 2, characterized in that: The joint body (7) is provided with a travel groove (18) near the connecting ring (11), and the outer surface of the force ring (12) is fixedly connected with a first damping pad (19).

6. An air compressor equipped with an air inlet drying device according to claim 1, characterized in that: The moving mechanism (41) comprises: The bottom sides of the gas storage tank (1) are fixedly connected to a second support frame (20), the bottom of the second support frame (20) is provided with a first rotating shaft (21), the outer surfaces of both ends of the first rotating shaft (21) are rotatably connected to first connecting blocks (22), and the first connecting blocks (22) are respectively fixedly connected to the second support frame (20); A rotating sleeve (23) is disposed on one side opposite to the two first connecting blocks (22), the rotating sleeves (23) are respectively rotatably connected to the first rotating shaft (21), and a moving wheel (24) is disposed on the outer side of the rotating sleeves (23); The moving wheel (24) and the rotating sleeve (23) are connected via four groups of buffer mechanisms (25).

7. An air compressor equipped with an air inlet drying device according to claim 6, characterized in that: The buffer mechanism (25) comprises: Four sleeves (26) are evenly arranged between the moving wheel (24) and the rotating sleeve (23); the interior of each sleeve (26) is slidably connected to a limiting plate (27); one end of the limiting plate (27) is fixedly connected to a buffer rod (28); an end of the buffer rod (28) away from the limiting plate (27) passes through the sleeve (26) and extends to a first ring sleeve (29); the first ring sleeve (29) is fixedly connected to the limiting plate (27); and one end of the sleeve (26) close to the moving wheel (24) is fixedly connected to a second ring sleeve (30); The first ring sleeve (29) is rotatably connected to a second rotating shaft (31), both ends of the second rotating shaft (31) are fixedly connected to second connecting blocks (32), and the second connecting blocks (32) are fixedly connected to the rotating sleeve (23). The second ring sleeve (30) is rotatably connected to a third rotating shaft (33), both ends of the third rotating shaft (33) are fixedly connected to third connecting blocks (34), and the third connecting blocks (34) are fixedly connected to the moving wheel (24).

8. An air compressor equipped with an air inlet drying device according to claim 7, characterized in that: Second springs (35) are provided on both sides of the limit plate (27), and the second springs (35) are respectively arranged inside the sleeve (26). A second damping pad (36) is fixedly connected to the outer surface of the limit plate (27), and the second damping pad (36) cooperates with the second spring (35).

9. An air compressor equipped with an air inlet drying device as claimed in claim 7, characterized in that: The outer surfaces of the moving wheels (24) are each provided with a rubber pad (37), and the rubber pads (37) are respectively fixedly connected to the moving wheels (24).

10. An air compressor equipped with an air inlet drying device according to claim 1, characterized in that: A third support frame (38) is fixedly connected to the side of the gas storage tank (1) away from the first support frame (5), a push rod (39) is fixedly connected to the top of the third support frame (38), and a silicone pad (40) is fixedly connected to the middle outer surface of the push rod (39).

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