Pneumatic actuating mechanism with buffering function
By designing buffer and airbag components in the pneumatic actuator, the problems of long buffer stroke and spark hazards in pneumatic control valves during frequent switching and rapid shut-off control are solved, achieving fast, accurate buffer control and enhanced safety.
Patent Information
- Application Number
- CN202520136316.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing pneumatic control valves have problems such as long buffer stroke, large structural size, high cost, and easy generation of sparks in frequent switching and rapid shut-off control applications, especially posing safety hazards in flammable and explosive media.
A pneumatic actuator with a buffer function was designed. By symmetrically arranging buffer components on the surfaces of the upper and lower cylinder heads, including a buffer plate, a buffer column, a positioning rod, a housing, and an airbag assembly, the buffer plate, buffer column, spring, and airbag work together to achieve fast and accurate buffer control and avoid violent impacts and sparks.
It achieves accurate buffer control during rapid and frequent movements, shortens the buffer stroke, reduces production costs, enhances safety, and avoids the generation of sparks during impact.
Smart Images
Figure CN223595170U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pneumatic actuator technical field, concretely relates to a kind of pneumatic actuator with buffering function. BACKGROUND
[0002] Pneumatic actuator is commonly known as pneumatic head, also called pneumatic actuator, actuator is divided into pneumatic, electric and hydraulic three categories according to its energy form, they each have characteristics, applicable to different occasions, pneumatic actuator is a kind of category in actuator, pneumatic actuator can also be divided into single-acting and double-acting two types, the switching action of actuator is driven by gas source to execute, called double-acting, single-acting actuator is only gas source driving to open or close, and the opposite action is reset by spring;At present, pneumatic control valve is applied to more and more occasions of frequent opening and closing and rapid cut-off control, and in actual use, some pneumatic control valves have special structures such as soft valve seat or sharp angle sealing valve seat, which do not allow the pneumatic control valve to collide violently.In addition, when the medium flowing is flammable and explosive special medium, it is easy to cause accidents due to collision sparks, and the pneumatic control valve is not allowed to collide violently;At present, the pneumatic actuator with buffering function is generally achieved by changing the flow of inlet and exhaust to realize buffering control, but the buffering stroke of this kind of pneumatic actuator is long, and there is serious lag in opening and closing position;In addition, its structure size is large, the space size required for installation is large, the production cost is also high, and the buffering effect of impact is not obvious enough, and there is still a probability of spark when impacting. SUMMARY
[0003] In order to overcome the defects existing in the prior art, a pneumatic actuator with buffering function is provided to solve the problems raised in the background art.
[0004] In order to achieve the above-mentioned purpose, a pneumatic actuator with buffering function is provided, which comprises: a buffering assembly and an air bag assembly, the pneumatic actuator is composed of an upper cylinder cover, a cylinder body, a piston and a lower cylinder cover, the buffering assembly is symmetrically connected to the opposite surfaces of the upper cylinder cover and the lower cylinder cover, the buffering assembly is composed of a buffering plate, a buffering column, a positioning rod, a shell and a bottom plate, the shell and the positioning rod are fixedly connected to the upper surface of the base plate respectively, a through hole is formed in the position corresponding to the positioning rod on the upper surface of the shell, a fastening sleeve is fixedly connected in the through hole, the buffering plate is fixedly connected to the upper end of the buffering column, the buffering column is sleeved with the positioning rod through the fastening sleeve, the spring is fixedly connected to the top of the inner cavity of the buffering column, the fixed plate is fixedly connected to the lower end of the buffering column through the limiting plate, and the air bag assembly is arranged on the surface of the bottom plate corresponding to the position of the fixed plate, the air bag assembly is composed of an upper cover plate, an air bag main body and a lower cover plate, the lower cover plate is fixedly connected to the surface of the bottom plate, the air bag main body and a guide rod are fixedly connected to the upper surface of the lower cover plate respectively, and the upper cover plate is fixedly connected to the upper surface of the air bag main body, a guide hole is formed in the position corresponding to the guide rod on the surface of the upper cover plate.
[0005] Preferably, the bottom plate is rectangular in structure, the shell fixedly connected to the upper surface of the bottom plate is in the shape of a Chinese character, four groups of positioning rods are fixedly connected to the upper surface of the bottom plate along the length direction in parallel and at equal intervals, and the four groups of positioning rods are in cylindrical structure.
[0006] Preferably, the fastening sleeve is in overall cylindrical structure, the shaft section of the fastening sleeve is in the shape of an I-beam, the openings at both ends of the inner cavity of the fastening sleeve are in the shape of a truncated cone, and the size of the inner cavity of the fastening sleeve and the outer side surface of the buffer column are matched.
[0007] Preferably, the buffer plate is rectangular in structure, the buffer columns are fixedly connected to the lower surface of the buffer plate corresponding to the positions of the positioning rods, the buffer columns are in cylindrical structure, the shaft section of the buffer columns is in the shape of a Chinese character, the buffer plate and the buffer columns are combined to form an E-shaped structure, and the upper surface of the buffer plate and the lower surface of the bottom plate are both fixedly connected to the buffer layer.
[0008] Preferably, a plurality of groups of auxiliary rings are fixedly connected to the outer circular surface of the buffer column in parallel and at equal intervals along the axial direction, the plurality of groups of auxiliary rings are in circular ring structure, the shaft section of the auxiliary ring is in semicircular structure, the limiting plate fixedly connected to the lower end of the buffer column is in the shape of an outer square and an inner circle, the size of the inner cavity of the buffer column and the positioning rod is matched.
[0009] Preferably, the fixed plate is in cross structure, the size of the fixed plate and the inner cavity of the shell is matched, the fixed plate is fixedly connected between adjacent limiting rings, the buffer plate, the buffer column, the limiting ring and the fixed plate are combined to form a cross-shaped structure.
[0010] Preferably, the lower cover plate and the upper cover plate are both rectangular in structure, the size of the lower cover plate and the upper cover plate is matched, the air bag body fixedly connected between the upper cover plate and the lower cover plate is in square structure, and the length of the air bag is less than the length of the lower cover plate.
[0011] Preferably, four groups of guide rods are symmetrically connected to the four corners of the surface of the lower cover plate, the four groups of guide rods are in cylindrical structure, the upper surfaces of the four groups of guide rods are all fixedly connected to the baffle, the baffle is in circular structure, the guide rod and the baffle are combined to form a shaft section in T-shaped structure, and the size of the guide hole of the upper cover plate and the guide rod is matched.
[0012] Compared with the prior art, the beneficial effects of the utility model are: through the buffer assembly that is arranged symmetrically on the upper cylinder cover and the lower cylinder cover surface, the pneumatic actuator has the buffer function at the stroke starting point and the end point position, can be used for fast, frequent action occasion, and through the cooperation of the buffer plate, the buffer column, the spring, the positioning rod, the fastening sleeve, the fixed plate and the air bag assembly, the buffer stroke is accurately controllable, the buffer stroke is small, does not affect the response speed of the pneumatic actuator, and the buffer assembly is modular structure, can be conveniently disassembled, replaced, the buffer layer that is arranged on the surface of the buffer plate and the bottom plate is fixedly connected with the fastening sleeve of the shell surface, can effectively buffer the impact effect, avoids the spark when impacting, enhances the safety when the pneumatic actuator is used. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is the front view schematic diagram of the utility model embodiment.
[0014] Figure 2 It is the buffer assembly compression front view schematic diagram of the utility model embodiment.
[0015] Figure 3 It is the buffer assembly compression side view schematic diagram of the utility model embodiment.
[0016] Figure 4 It is the buffer assembly compression plan view schematic diagram of the utility model embodiment.
[0017] Figure 5 It is the buffer assembly compression plan view schematic diagram of the utility model embodiment. Figure 2 It is the A place enlarged schematic diagram of the utility model embodiment.
[0018] In the drawing: 1, upper cylinder cover, 2, cylinder body, 3, buffer assembly, 4, piston, 5, lower cylinder cover, 6, buffer plate, 7, buffer column, 8, fastening sleeve, 9, positioning rod, 10, auxiliary ring, 11, shell, 12, bottom plate, 13, limiting plate, 14, fixed plate, 15, air bag assembly, 16, upper cover plate, 17, guide rod, 18, air bag main body, 19, lower cover plate. DETAILED DESCRIPTION
[0019] Refer to Figures 1 to 5As shown, the utility model provides a kind of pneumatic actuator with buffering function, comprising: buffer assembly 3 and air bag assembly 15, pneumatic actuator is composed of upper cylinder cover 1, cylinder body 2, piston 4 and lower cylinder cover 5, the buffer assembly 3 is symmetrically connected to the surface opposite of upper cylinder cover 1 and lower cylinder cover 5, and buffer assembly 3 is composed of buffer plate 6, buffer column 7, locating rod 9, shell 11 and bottom plate 12, and the upper surface of base plate is fixedly connected shell 11 and locating rod 9 respectively, and the position of the upper surface of shell 11 relative to locating rod 9 is correspondingly provided with through hole, and fastening sleeve 8 is fixedly connected in through hole, while the upper end of buffer column 7 is fixedly connected buffer plate 6, buffer column 7 lower end is sleeved with locating rod 9 through fastening sleeve 8, and the top of buffer column 7 inner cavity is fixedly connected spring, and the lower end of buffer column 7 is fixedly connected fixed plate 14 by limiting plate 13, and the surface of bottom plate 12 is correspondingly provided with air bag assembly 15 relative to fixed plate 14, the air bag assembly 15 is composed of upper cover plate 16, air bag main body 18 and lower cover plate 19, and lower cover plate 19 is fixedly connected on the surface of bottom plate 12, and the upper surface of lower cover plate 19 is fixedly connected air bag main body 18 and guide rod 17 respectively, and the upper surface of air bag main body 18 is fixedly connected upper cover plate 16, while the surface of upper cover plate 16 is correspondingly provided with guide hole relative to guide rod 17.
[0020] In the embodiment, when the pneumatic actuator acts upward or downward, the surface of piston 4 will abut the buffer assembly 3 correspondingly provided on the surface of upper cylinder cover 1 or lower cylinder cover 5, and piston 4 will push buffer column 7 to move synchronously by buffer plate 6, so that relative motion is generated between buffer column 7 and locating rod 9, the spring in buffer column 7 is extruded, and by the cooperation of auxiliary ring 10 and fastening sleeve 8, the friction resistance between buffer column 7 and shell 11 can be further increased, so that the resistance when piston 4 continues to move can be effectively increased, the moving speed of piston 4 is gradually slowed down, and the setting of air bag assembly 15 can further increase the resistance when piston 4 pushes buffer plate 6 and buffer column 7, so as to further enhance the deceleration effect of piston 4, and also can assist to reduce the impact effect generated in the deceleration process of piston 4, to ensure the safety of the pneumatic actuator when running.
[0021] As a preferred embodiment, bottom plate 12 is rectangular structure, the cross section of shell 11 fixedly connected on the upper surface of bottom plate 12 is L-shaped structure, and four groups of locating rod 9 are fixedly connected on the upper surface of bottom plate 12 along the length direction in parallel and equidistantly, and the four groups of locating rod 9 are all cylindrical structure.
[0022] In the embodiment, as Figure 2 , Figure 3 and Figure 4 , the setting of shell 11 makes each buffer structure inside buffer assembly 3 can run in relatively closed environment, which can assist to reduce the probability of failure and damage of buffer assembly 3, and also can facilitate the modularized mounting and dismounting of buffer assembly 3.
[0023] As a preferred embodiment, the fastening sleeve 8 is in a cylindrical structure as a whole, the axial section of the fastening sleeve 8 is in an H-shaped structure, and the openings at both ends of the inner cavity of the fastening sleeve 8 are in a circular truncated cone structure, and the size of the inner cavity of the fastening sleeve 8 and the outer side surface of the buffer column 7 are matched.
[0024] In this embodiment, as Figure 5 , the fastening sleeve 8 is made of soft rubber material, thereby enhancing the elasticity of the fastening sleeve 8, so that the inner cavity of the fastening sleeve 8 can fit the surface of the buffer column 7, and the structure of the inner cavity of the fastening sleeve 8 can assist in reducing the difficulty of embedding the auxiliary ring 10, avoiding the fault of jamming between the buffer column 7 and the fastening sleeve 8.
[0025] As a preferred embodiment, the buffer plate 6 is in a rectangular structure, the lower surface of the buffer plate 6 is connected to the buffer column 7 corresponding to the position of the positioning rod 9, and the buffer column 7 is in a cylindrical structure, the axial section of the buffer column 7 is in an H-shaped structure, and the buffer plate 6 and the buffer column 7 are combined to form an E-shaped structure, and the upper surface of the buffer plate 6 and the lower surface of the bottom plate 12 are both fixedly connected to the buffer layer.
[0026] In this embodiment, as Figure 2 and Figure 3 , the buffer layer is made of soft rubber material, thereby assisting in enhancing the buffering effect at the contact surface between the buffer assembly 3 and the upper cylinder cover 1, the lower cylinder cover 5 and the piston 4, thereby effectively weakening the impact force when the piston 4 moves, effectively avoiding the generation of sparks, thereby enhancing the safety of the operation of the pneumatic actuator.
[0027] As a preferred embodiment, the outer arc surface of the buffer column 7 is fixedly connected to a plurality of auxiliary rings 10 in parallel along the axial direction at equal intervals, and the plurality of auxiliary rings 10 are all in a circular ring structure, the axial section of the auxiliary ring 10 is in a semicircular structure, and the limiting plate 13 fixedly connected to the lower end of the buffer column 7 is in an outer square and inner circular structure, and the size of the inner cavity of the buffer column 7 and the positioning rod 9 are matched.
[0028] In this embodiment, as Figure 3 , Figure 4 and Figure 5 , the setting of the auxiliary ring 10 can effectively increase the frictional resistance when the buffer column 7 and the fastening sleeve 8 slide relative to each other, thereby effectively enhancing the deceleration effect of the buffer assembly 3 on the piston 4, and the arc surface of the auxiliary ring 10 can also effectively reduce the probability of accidental wear of the fastening sleeve 8.
[0029] As a preferred embodiment, the fixing plate 14 is in a cross structure, the fixing plate 14 and the inner cavity of the shell 11 are in a suitable size, and the fixing plate 14 is fixedly connected between adjacent limiting rings, and the buffer plate 6, the buffer column 7, the limiting ring and the fixing plate 14 are combined to form a cross structure.
[0030] In the embodiment, as shown in Figure 2 , Figure 3 and Figure 4 , the fixing plate 14 is arranged to connect the plurality of buffer columns 7 into a whole, thereby ensuring the stability of the buffer plate 6 during movement and assisting in enhancing the stability of the buffer column 7 during movement, and enhancing the buffering effect of the buffer assembly 3.
[0031] As a preferred embodiment, the lower cover plate 19 and the upper cover plate 16 are in a rectangular structure, the size of the lower cover plate 19 and the upper cover plate 16 is suitable, and the air bag body 18 fixedly connected between the upper cover plate 16 and the lower cover plate 19 is in a square structure, and the length of the air bag is less than the length of the lower cover plate 19.
[0032] In the embodiment, as shown in Figure 2 , Figure 3 and Figure 4 , the upper cover plate 16 and the lower cover plate 19 are arranged to effectively limit the deformation of the square air bag body 18, and assist in enhancing the buffering effect of the air bag body 18, thereby further enhancing the buffering effect of the buffer assembly 3.
[0033] As a preferred embodiment, four groups of guide rods 17 are symmetrically connected at the four corners of the surface of the lower cover plate 19, the four groups of guide rods 17 are in a cylindrical structure, the upper surfaces of the four groups of guide rods 17 are fixedly connected with baffles, the baffles are in a circular structure, the cross section of the guide rod 17 and the baffle combined together is in a T-shaped structure, and the size of the guide hole of the upper cover plate 16 and the guide rod 17 is suitable.
[0034] In the embodiment, as shown in Figure 2 , Figure 3 and Figure 4 , the size of the guide rod 17 and the guide hole is suitable, thereby effectively enhancing the stability of the upper cover plate 16 during movement, avoiding the problem of position deviation of the upper cover plate 16 during extrusion of the air bag body 18 or reset, and the arrangement of the baffle can effectively limit the movement range of the upper cover plate 16, thereby ensuring the integrity of the overall structure of the air bag assembly 15.
[0035] The pneumatic actuating mechanism with the buffering function is provided with the multiple buffering structure in the buffering assembly 3 through the cooperation of the buffering plate 6, the buffering column 7, the positioning rod 9, the fastening sleeve 8, the spring and the air bag assembly 15, thereby effectively enhancing the buffering effect when the pneumatic actuating mechanism operates, and through the cooperation of the buffering layer, the buffering effect of the impact surface can be further enhanced, and the safety when the pneumatic actuating mechanism is used is enhanced.
Claims
1. A pneumatic actuator with a buffer function, comprising: The buffer assembly (3) and airbag assembly (15) are pneumatic actuators composed of an upper cylinder head (1), a cylinder body (2), a piston (4), and a lower cylinder head (5). The buffer assembly (3) is characterized by being symmetrically connected to the opposing surfaces of the upper cylinder head (1) and the lower cylinder head (5). The buffer assembly (3) is composed of a buffer plate (6), a buffer column (7), a positioning rod (9), a housing (11), and a base plate (12). The upper surface of the base plate is fixedly connected to the housing (11) and the positioning rod (9). A through-hole is opened on the upper surface of the housing (11) relative to the position of the positioning rod (9). A fastening sleeve (8) is fixedly connected inside the through-hole. Simultaneously, the upper end of the buffer column (7) is fixedly connected to the buffer plate (6), and the lower end of the buffer column (7) passes through the fastening sleeve (8). 8) The positioning rod (9) is sleeved, and the top of the inner cavity of the buffer column (7) is fixedly connected to the spring. The lower end of the buffer column (7) is fixedly connected to the fixing plate (14) through the limiting plate (13). The airbag assembly (15) is set on the surface of the bottom plate (12) relative to the position of the fixing plate (14). The airbag assembly (15) consists of an upper cover plate (16), an airbag body (18) and a lower cover plate (19). The lower cover plate (19) is fixedly connected to the surface of the bottom plate (12). The upper surface of the lower cover plate (19) is fixedly connected to the airbag body (18) and the guide rod (17). The upper surface of the airbag body (18) is fixedly connected to the upper cover plate (16). At the same time, the upper cover plate (16) is opened with a guide hole corresponding to the position of the guide rod (17) on the surface of the upper cover plate (16).
2. The pneumatic actuator with buffer function according to claim 1, characterized in that, The base plate (12) has a rectangular structure. The shell (11) fixedly connected to the upper surface of the base plate (12) has a U-shaped cross section. Four sets of positioning rods (9) are fixedly connected to the upper surface of the base plate (12) along the length direction at equal intervals. All four sets of positioning rods (9) have a cylindrical structure.
3. The pneumatic actuator with buffer function according to claim 1, characterized in that, The fastening sleeve (8) has an overall cylindrical structure, the axial section of the fastening sleeve (8) has an I-shaped structure, and the openings at both ends of the inner cavity of the fastening sleeve (8) are frustum-shaped structures. At the same time, the dimensions of the inner cavity of the fastening sleeve (8) and the outer side of the buffer column (7) are compatible.
4. A pneumatic actuator with buffer function according to claim 1, characterized in that, The buffer plate (6) has a rectangular structure. The position of the lower surface of the buffer plate (6) relative to the positioning rod (9) is connected to the buffer column (7). The buffer column (7) has a cylindrical structure and the axial section of the buffer column (7) has a U-shaped structure. The buffer plate (6) and the buffer column (7) are combined to form an E-shaped structure. At the same time, the upper surface of the buffer plate (6) and the lower surface of the bottom plate (12) are both fixedly connected to the buffer layer.
5. A pneumatic actuator with buffer function according to claim 1, characterized in that, The outer arc surface of the buffer column (7) is fixedly connected with multiple sets of auxiliary rings (10) at equal intervals along the axial direction. All sets of auxiliary rings (10) are circular ring structures. The axial section of the auxiliary rings (10) is semi-circular. The limiting plate (13) fixedly connected to the lower end of the buffer column (7) is square on the outside and circular on the inside. At the same time, the size of the inner cavity of the buffer column (7) and the positioning rod (9) are compatible.
6. A pneumatic actuator with buffer function according to claim 1, characterized in that, The fixing plate (14) has a cross-shaped structure. The size of the fixing plate (14) and the inner cavity of the shell (11) are matched. The fixing plate (14) is fixedly connected between adjacent limiting rings. At the same time, the buffer plate (6), buffer column (7), limiting ring and fixing plate (14) are combined together to form a shaped structure.
7. A pneumatic actuator with buffer function according to claim 1, characterized in that, The lower cover plate (19) and the upper cover plate (16) are both rectangular in shape, and the dimensions of the lower cover plate (19) and the upper cover plate (16) are matched. The airbag body (18) fixedly connected between the upper cover plate (16) and the lower cover plate (19) is square in shape, and the length of the airbag is less than the length of the lower cover plate (19).
8. A pneumatic actuator with buffer function according to claim 1, characterized in that, Four sets of guide rods (17) are symmetrically connected at the four corners of the surface of the lower cover plate (19). All four sets of guide rods (17) are cylindrical in shape, and baffles are fixedly connected to the upper surface of the four sets of guide rods (17). The baffles are circular in shape, and the axial section formed by the combination of the guide rods (17) and the baffles is T-shaped. Meanwhile, the guide holes opened on the upper cover plate (16) are matched with the size of the guide rods (17).