Bidirectional buffer type pneumatic actuator

Abstract

The utility model discloses a bi-directional buffer type pneumatic actuator which comprises a pneumatic actuator shell, a first driving piece and a second driving piece, a first reserved cavity is formed inside the pneumatic actuator shell, a second reserved cavity is formed inside the pneumatic actuator shell on the outer side of the first reserved cavity, and the first reserved cavity is communicated with the second reserved cavity. And a third air guide through hole is formed in the bottom of the first reserved cavity. Due to the fact that the piston body and the like are installed, when the device is used, the first driving piece and the second driving piece which are fixed to the piston body and provided with the racks are sequentially meshed on the gear type output piece, and the limiting sliding sleeves for buffering are fixed to the two sides of the first driving piece and the two sides of the second driving piece respectively. And a limiting sliding rod for buffering, which is in sliding connection with the limiting sliding sleeve for buffering, is welded in the first reserved cavity, so that the piston body can be buffered, limited and protected when the shell of the pneumatic actuator is opened or closed.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic actuators, in particular to a bidirectional buffer type pneumatic actuator. Background Art

[0002] Pneumatic actuators are widely used in mechanical automation control, production lines, aerospace industry, medical equipment and other fields. Pneumatic actuators are devices used in mechanical automation control systems that use gas pressure to drive mechanical movement. However, there are still some defects in the specific use of pneumatic actuators.

[0003] Pneumatic actuators often directly achieve opening and closing control by pneumatically driving the corresponding gear-type output parts to move. There is often no corresponding buffer protection structure inside the casing of the pneumatic actuator, which causes the internal output parts to move more violently and with poor stability when the pneumatic actuator is opened and closed. It is also prone to lateral deviation and affects the accuracy. Based on this, we propose a new type of bidirectional buffered pneumatic actuator to provide better and smoother pneumatic control effects. Utility Model Content

[0004] The purpose of the utility model is to provide a bidirectional buffer type pneumatic actuator to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bidirectional buffer type pneumatic actuator, comprising a pneumatic actuator housing, a first driving member and a second driving member, the interior of the pneumatic actuator housing is provided with a first reserved cavity, the interior of the pneumatic actuator housing outside the first reserved cavity is provided with a second reserved cavity, the bottom of the first reserved cavity is provided with a third air guide hole, the bottom of the pneumatic actuator housing is provided with a second air guide hole matching the third air guide hole, the pneumatic actuator housing at one end of the second air guide hole is provided with a first air guide hole connected to the second reserved cavity, the first driving member and the second driving member are separately provided with a third air guide hole, and the second air guide hole is provided with a second air guide hole connected to the first reserved cavity. The first drive member and the second drive member are respectively slidably connected to the two ends of the first reserved cavity, a gear-type output member is connected to the middle position of the first reserved cavity between the first drive member and the second drive member, and the first drive member and the second drive member are provided with racks matching the gear-type output member, and the first drive member and the second drive member are fixed with piston bodies at one end close to the second reserved cavity, and a composite spring for buffering and a telescopic rod for guiding are evenly installed between the piston body and the second reserved cavity, and a buffering limiting sleeve is fixed on both sides of the first drive member and the second drive member, and a buffering limiting slide rod slidably connected to the buffering limiting sleeve is welded inside the first reserved cavity.

[0006] Preferably, both ends of the pneumatic actuator housing are clamped with side covers.

[0007] Preferably, locking bolts are evenly arranged between the side cover body and the pneumatic actuator housing, and a rubber sealing layer is vulcanized and connected to the side cover body and the pneumatic actuator housing, thereby improving the sealing protection effect when the side cover body and the pneumatic actuator housing are assembled.

[0008] Preferably, the first air-conducting through hole and the second air-conducting through hole are both threadedly connected with filter tubes, so that the pneumatic actuator housing can be better filtered and blocked.

[0009] Preferably, a filter cloth layer is provided inside the filter tube, and an operating handle is welded to the bottom of the filter tube.

[0010] Preferably, hollow bearings connected to the inner wall of the pneumatic actuator housing are provided on both sides of the gear-type output member, so as to improve the stability of the gear-type output member during rotational motion.

[0011] Preferably, the guiding telescopic rod is arranged inside the composite spring for buffering, and two ends of the guiding telescopic rod are respectively welded to two ends of the composite spring for buffering.

[0012] Preferably, the inner side wall of the buffer limiting sliding sleeve is evenly provided with silicone rubber buffering protrusions matching the buffer limiting sliding rod.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] (1) The bidirectional buffer type pneumatic actuator is installed with a buffer composite spring and a guiding telescopic rod, etc., so that the device optimizes its own structure. On the one hand, the first driving member and the second driving member with a rack fixed to the piston body are meshed in sequence on the gear output member, and a buffer limit sleeve is fixed on both sides of the first driving member and the second driving member, and a buffer limit slide rod slidably connected to the buffer limit slide sleeve is welded inside the first reserved cavity, so that the piston body can be buffered and limited when the pneumatic actuator housing is opened or closed. On the other hand, the buffer composite spring and the guiding telescopic rod are evenly installed between the piston body and the second reserved cavity, so that the device can be further buffered and guided, and the two ends of the guiding telescopic rod are respectively welded to the two ends of the buffer composite spring. The guiding telescopic rod can be used to limit and guide the buffer composite spring to ensure its telescopic movement in the horizontal direction. This allows the device to achieve effective buffering when the actuator is opened and closed through a multi-stage buffer protection structure, that is, it has a bidirectional buffer protection function, which can improve the service life of related equipment and has high practical value.

[0015] (2) The bidirectional buffer type pneumatic actuator is equipped with a filter tube, etc., so that when the device is used, on the one hand, the filter tube with a filter cloth layer is threadedly connected inside the first air guide hole and the second air guide hole, so that the opening at the bottom of the pneumatic actuator housing can be filtered and prevented from being blocked, thereby preventing dust and other impurities from entering the pneumatic actuator housing to cause pollution and blockage, which is beneficial to extending the service life of the pneumatic actuator housing. On the other hand, the side covers are clamped at both ends of the pneumatic actuator housing and locked and fixed by locking bolts, which facilitates the disassembly and assembly of the side covers at both ends of the pneumatic actuator housing, thereby facilitating the inspection and maintenance of the pneumatic actuator housing.

[0016] (3) The bidirectional buffering pneumatic actuator is equipped with a second air guide hole, etc., so that when the device is actually operated, on the one hand, when the introduced compressed air is input through the second air guide hole, the second air guide hole and the third air guide hole are connected, so that the left and right piston bodies inside the pneumatic actuator housing can move to both sides and squeeze the buffer composite spring, and the gear-type output member rotates counterclockwise to open the external valve, and the air accumulated in the second reserved cavity outside the two piston bodies is discharged through the first air guide hole. On the other hand, when there is no air or electricity, the potential energy of the buffer composite spring causes the two piston bodies to move toward the middle, and the gear-type output member rotates clockwise to close the external valve. The second air guide hole and the third air guide hole are no longer connected, and the air inside the two piston bodies is discharged through the second air guide hole. The first air guide hole can be used to accelerate the closing, and the guiding telescopic rod is arranged inside the buffer composite spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the partial cross-section structure of the utility model in an open state;

[0019] Figure 3 This is a schematic diagram of the partial cross-section structure of the utility model in a closed state;

[0020] Figure 4 This is a rear view structural diagram of the first driving member of the utility model;

[0021] Figure 5 For this utility model Figure 3 Enlarged structural diagram at A in the middle.

[0022] In the figure: 1. pneumatic actuator housing; 2. side cover body; 3. locking bolt; 4. first driving member; 5. gear output member; 6. first reserved cavity; 7. second driving member; 8. first air guide hole; 9. second air guide hole; 10. third air guide hole; 11. composite spring for buffering; 12. telescopic rod for guiding; 13. second reserved cavity; 14. piston body; 15. limit sliding sleeve for buffering; 16. limit sliding rod for buffering; 18. rack; 19. filter tube; 20. operating handle. DETAILED DESCRIPTION

[0023] 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. 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.

[0024] See also Figure 1-5 , an embodiment provided by the utility model: a bidirectional buffer type pneumatic actuator, comprising a pneumatic actuator housing 1, a first driving member 4 and a second driving member 7, a first reserved cavity 6 is arranged inside the pneumatic actuator housing 1, a second reserved cavity 13 is arranged inside the pneumatic actuator housing 1 outside the first reserved cavity 6, a third air guide hole 10 is arranged at the bottom of the first reserved cavity 6, a second air guide hole 9 matching the third air guide hole 10 is arranged at the bottom of the pneumatic actuator housing 1, and a first air guide hole 8 connected to the second reserved cavity 13 is arranged on the pneumatic actuator housing 1 at one end of the second air guide hole 9;

[0025] The first driving member 4 and the second driving member 7 are slidably connected to the two ends of the first reserved cavity 6 respectively, and a gear output member 5 is connected to the middle position of the first reserved cavity 6 between the first driving member 4 and the second driving member 7. The first driving member 4 and the second driving member 7 are provided with racks 18 matching the gear output member 5, and the first driving member 4 and the second driving member 7 are both fixed with piston bodies 14 at one end close to the second reserved cavity 13;

[0026] A composite spring 11 for buffering and a telescopic rod 12 for guiding are evenly installed between the piston body 14 and the second reserved cavity 13. A buffering limiting sliding sleeve 15 is fixed on both sides of the first driving member 4 and the second driving member 7. A buffering limiting sliding rod 16 slidably connected to the buffering limiting sliding sleeve 15 is welded inside the first reserved cavity 6.

[0027] When in use, when the introduced compressed air is inputted from the second air guide hole 9, the second air guide hole 9 is connected to the third air guide hole 10. Figure 2As shown, the two piston bodies 14 on the left and right inside the pneumatic actuator housing 1 can move to both sides and squeeze the composite spring 11 for buffering, and the gear output member 5 rotates counterclockwise to open the external valve, and the air accumulated in the second reserved cavity 13 outside the two piston bodies 14 is discharged from the first air guide hole 8. On the other hand, when there is no air or electricity, Figure 3 As shown, due to the potential energy of the composite spring 11 for buffering, the two piston bodies 14 move toward the middle, the gear-type output member 5 rotates clockwise, closing the external valve, the second air guide hole 9 and the third air guide hole 10 are no longer connected, the air inside the two piston bodies 14 is discharged from the second air guide hole 9, and the first air guide hole 8 can be used to accelerate the closing;

[0028] Both ends of the pneumatic actuator housing 1 are clamped with side covers 2;

[0029] Locking bolts 3 are evenly arranged between the side cover body 2 and the pneumatic actuator housing 1, and a rubber sealing layer is vulcanized and connected on the side cover body 2 and the pneumatic actuator housing 1, so as to improve the sealing protection effect when the side cover body 2 and the pneumatic actuator housing 1 are assembled;

[0030] When in use, the side covers 2 are clamped at both ends of the pneumatic actuator housing 1 and fixed by locking bolts 3, which facilitates the disassembly and assembly of the side covers 2 at both ends of the pneumatic actuator housing 1, thereby facilitating the inspection and maintenance of the pneumatic actuator housing 1;

[0031] The first air-conducting through hole 8 and the second air-conducting through hole 9 are both threadedly connected with a filter tube 19, so that the filter tube 19 can achieve better filtering and anti-blocking protection for the pneumatic actuator housing 1;

[0032] A filter cloth layer is provided inside the filter tube 19, and an operating handle 20 is welded to the bottom of the filter tube 19;

[0033] When in use, by threading the filter tube 19 with the filter cloth layer inside the first air guide hole 8 and the second air guide hole 9, the opening at the bottom of the pneumatic actuator housing 1 can be better filtered and prevented from being blocked, and dust and other impurities can be prevented from entering the pneumatic actuator housing 1 to cause pollution and blockage, which is beneficial to prolonging the service life of the pneumatic actuator housing 1;

[0034] Hollow bearings connected to the inner wall of the pneumatic actuator housing 1 are provided on both sides of the gear output member 5, so as to improve the stability of the gear output member 5 during rotation.

[0035] The guiding telescopic rod 12 is arranged inside the buffering composite spring 11, and the two ends of the guiding telescopic rod 12 are respectively welded to the two ends of the buffering composite spring 11;

[0036] The inner side wall of the buffer limiting sliding sleeve 15 is evenly provided with silicone rubber buffering protrusions matching the buffer limiting sliding rod 16 .

[0037] When the embodiment of the present application is used: the pneumatic actuator housing 1 and the corresponding valve to be controlled and other equipment are assembled. During actual operation, when the introduced compressed air is input from the second air guide hole 9, the second air guide hole 9 is connected to the third air guide hole 10, such as Figure 2 As shown, the two piston bodies 14 on the left and right inside the pneumatic actuator housing 1 can move to both sides and squeeze the composite spring 11 for buffering, and the gear output member 5 rotates counterclockwise to open the external valve, and the air accumulated in the second reserved cavity 13 outside the two piston bodies 14 is discharged from the first air guide hole 8. On the other hand, when there is no air or electricity, Figure 3As shown, due to the potential energy of the buffer composite spring 11, the two piston bodies 14 move toward the middle, the gear-type output member 5 rotates clockwise, the external valve is closed, the second air guide hole 9 and the third air guide hole 10 are no longer connected, the air inside the two piston bodies 14 is discharged from the second air guide hole 9, the first air guide hole 8 can be used to accelerate the closing, and by arranging the guiding telescopic rod 12 inside the buffer composite spring 11, at the same time, by sequentially meshing with the gear-type output member 5 with the rack 1 fixed to the piston body 14 The first driving member 4 and the second driving member 7 of 8 are provided, and a buffering limit sliding sleeve 15 is fixed on both sides of the first driving member 4 and the second driving member 7, and a buffering limit sliding rod 16 slidably connected to the buffering limit sliding sleeve 15 is welded inside the first reserved cavity 6, which can provide buffering and limiting protection for the piston body 14 when the pneumatic actuator housing 1 is opened or closed. On the other hand, the buffering composite spring 11 and the guiding telescopic rod 12 are evenly installed between the piston body 14 and the second reserved cavity 13, so that the device can be realized. The invention provides a buffer guide protection, and the two ends of the guiding telescopic rod 12 are respectively welded to the two ends of the buffer composite spring 11. The guiding telescopic rod 12 can be used to limit and guide the buffer composite spring 11 to ensure its telescopic movement in the horizontal direction. This enables the device to achieve effective buffering when the actuator is opened and closed through a multi-stage buffer protection structure, that is, it has a two-way buffer protection function, which can improve the service life of related equipment and has high practical value. In addition, on the one hand, a filter tube 19 with a filter cloth layer is threadedly connected to the inside of the first air guide hole 8 and the second air guide hole 9, so that the opening at the bottom of the pneumatic actuator housing 1 can be filtered and blocked to prevent dust and other impurities from entering the inside of the pneumatic actuator housing 1 to cause pollution and blockage, which is beneficial to prolonging the service life of the pneumatic actuator housing 1. On the other hand, the side cover body 2 is clamped at both ends of the pneumatic actuator housing 1 and locked and fixed by the locking bolt 3, which facilitates the disassembly and assembly of the side cover body 2 at both ends of the pneumatic actuator housing 1, thereby facilitating the inspection and maintenance of the pneumatic actuator housing 1.

Claims

1. A bidirectional buffer pneumatic actuator, characterized in that: The invention comprises a pneumatic actuator housing (1), a first driving member (4) and a second driving member (7); a first reserved cavity (6) is arranged inside the pneumatic actuator housing (1); a second reserved cavity (13) is arranged inside the pneumatic actuator housing (1) outside the first reserved cavity (6); a third air guide hole (10) is arranged at the bottom of the first reserved cavity (6); a second air guide hole (9) matching the third air guide hole (10) is arranged at the bottom of the pneumatic actuator housing (1); a first air guide hole (8) connected to the second reserved cavity (13) is arranged on the pneumatic actuator housing (1) at one end of the second air guide hole (9); the first driving member (4) and the second driving member (7) are respectively slidably connected to the two ends of the first reserved cavity (6); the first driving member (4) and the second driving member (7) are respectively slidably connected to the two ends of the first reserved cavity (6); and the first driving member (4) and the second driving member (7) are respectively slidably connected to the two ends of the first reserved cavity (6). A gear output member (5) is connected to the middle position of the first reserved cavity (6) between the first driving member (4) and the second driving member (7); a rack (18) matching the gear output member (5) is arranged on the first driving member (4) and the second driving member (7); a piston body (14) is fixed to one end of the first driving member (4) and the second driving member (7) close to the second reserved cavity (13); a composite spring (11) for buffering and a telescopic rod (12) for guiding are evenly installed between the piston body (14) and the second reserved cavity (13); a buffer limiting sleeve (15) is fixed to both sides of the first driving member (4) and the second driving member (7); a buffer limiting slide rod (16) slidably connected to the buffer limiting sleeve (15) is welded inside the first reserved cavity (6).

2. A bidirectional buffer type pneumatic actuator according to claim 1, characterized in that: Both ends of the pneumatic actuator housing (1) are clamped with side covers (2).

3. A bidirectional buffer type pneumatic actuator according to claim 2, characterized in that: Locking bolts (3) are evenly arranged between the side cover body (2) and the pneumatic actuator housing (1), and a rubber sealing layer is vulcanized and connected to the side cover body (2) and the pneumatic actuator housing (1).

4. A bidirectional buffer pneumatic actuator according to claim 1, characterized in that: The first air-conducting through hole (8) and the second air-conducting through hole (9) are both threadedly connected with a filter tube (19) inside.

5. A bidirectional buffer type pneumatic actuator according to claim 4, characterized in that: A filter cloth layer is arranged inside the filter tube (19), and an operating handle (20) is welded to the bottom of the filter tube (19).

6. A bidirectional buffer pneumatic actuator according to claim 1, characterized in that: Hollow bearings connected to the inner wall of the pneumatic actuator housing (1) are provided on both sides of the gear-type output member (5).

7. A bidirectional buffer pneumatic actuator according to claim 1, characterized in that: The guiding telescopic rod (12) is arranged inside the buffering composite spring (11), and the two ends of the guiding telescopic rod (12) are respectively welded to the two ends of the buffering composite spring (11).

8. A bidirectional buffer pneumatic actuator according to claim 1, characterized in that: The inner side wall of the buffering limiting sliding sleeve (15) is evenly provided with silicone rubber buffering protrusions matching the buffering limiting sliding rod (16).

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