Pneumatic actuator

Abstract

According to the technical scheme, the pneumatic actuator is characterized in that the pneumatic actuator comprises a cylinder body, a driving shaft, a first piston plate, a second piston plate, a reset spring and two sets of rack assemblies, and the driving shaft is in linkage with the first piston plate and the second piston plate through the two rack assemblies; the first piston plate and the second piston plate abut against the cylinder body through reset springs. The rack assembly comprises a rack plate, rack blocks and a wear-resisting plate, mounting grooves and mounting holes are formed in the two opposite sides of the rack plate correspondingly, the multiple sets of mounting holes are formed in the length direction of the rack plate at equal intervals, and the multiple sets of rack blocks are detachably mounted in the mounting holes correspondingly; the wear-resisting plate is detachably mounted in the mounting groove, a guide groove is formed in the inner wall of the cylinder body, the wear-resisting plate is connected into the guide groove in a sliding mode, the whole rack does not need to be replaced, and the moving stability of the rack is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pneumatic actuator technical field, more specifically, it relates to a pneumatic actuator. BACKGROUND

[0002] Pneumatic actuator, also known as pneumatic actuator or pneumatic device, is commonly known as pneumatic head. It is to convert pressure energy into mechanical energy by using compressed air, drive mechanism to move, realize the accurate control of the controlled equipment.

[0003] The existing pneumatic actuator has the following problems: 1. Since the rack is composed of a plurality of tooth surfaces and strips, when part of the tooth surface is worn, the rack cannot move, and the staff usually replaces the rack, resulting in high cost; 2. The rack lacks effective guide structure, and the movement stability of the rack is affected after the rack is worn. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the utility model aims at providing a pneumatic actuator which can replace the whole rack and improve the movement stability of the rack.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a pneumatic actuator comprising a cylinder body, a drive shaft, a first piston plate, a second piston plate, a return spring and a rack assembly, the rack assembly is provided with two groups, the drive shaft is connected with the first piston plate and the second piston plate through two rack assemblies, and the first piston plate and the second piston plate are abutted with the cylinder body through the return spring;

[0006] The rack assembly comprises a rack plate, a rack block and a wear plate, opposite sides of the rack plate are respectively provided with a mounting groove and a mounting hole, the mounting hole is provided with a plurality of groups, and is arranged at equal intervals along the length direction of the rack plate, the rack block is provided with a plurality of groups, and is detachably installed in the mounting hole;

[0007] The wear plate is detachably installed in the mounting groove, the inner wall of the cylinder body is provided with a guide groove, and the wear plate is slidably connected in the guide groove.

[0008] The utility model is further provided with: a plurality of oil storage grooves are arranged on the wear plate.

[0009] The utility model is further provided with: an oil conveying channel is arranged on the rack plate and communicates with the mounting hole, the oil storage groove comprises a first oil storage groove and a second oil storage groove, and the oil conveying channel is in communication with the first oil storage groove.

[0010] The utility model further sets up: first oil storage tank and second oil storage tank all set up a plurality of groups, and all equidistantly arrange setting along the length direction of wear plate, first oil storage tank and second oil storage tank are sequentially arranged and set apart.

[0011] The utility model further sets up: the mounting hole is set up as convex structure, a plurality of sealing plates are detachably installed on the rack plate.

[0012] The utility model further sets up: the sealing plate is set up as convex structure, connecting holes are all set up on the both sides of sealing plate, a plurality of screw holes are set up on the rack plate.

[0013] The utility model further sets up: sealing layer is set up in the mounting hole.

[0014] The utility model further sets up: the installation groove is set up along one side of rack plate and penetrates, the rack plate is rotatably connected with the blocking plate, when wear plate is connected in the guide groove and slides, the groove wall of guide groove limits the rotation of blocking plate.

[0015] Summarized above, the utility model has following beneficial effect: the design of wear plate and guide groove can play the guiding effect in the rack assembly process, improves the stable of rack assembly movement.

[0016] The design that rack block can be dismantled, when rack block needs replacement, only needs to individually dismantle individual rack block, reduces economic cost. DRAWINGS

[0017] Figure 1 It is the schematic diagram of solid structure for pneumatic actuator;

[0018] Figure 2 It is the schematic diagram of structure inside cylinder body;

[0019] Figure 3 It is the schematic diagram of solid structure for rack assembly;

[0020] Figure 4 It is the schematic diagram of solid structure for rack plate.

[0021] Sign: 1, cylinder body;2, drive shaft;3, first piston plate;4, second piston plate;5, return spring;6, rack assembly;61, rack plate;611, installation groove;612, mounting hole;613, oil delivery channel;62, rack block;63, wear plate;631, first oil storage tank;632, second oil storage tank;7, sealing plate;8, blocking plate. SPECIFIC IMPLEMENTATION

[0022] The utility model is further explained in detail below in combination with the drawings and embodiments. Same parts are denoted by same reference numerals. It should be noted that the words "front", "back", "left", "right", "top" and "bottom" in the following description refer to the directions in the drawings, and the words "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a specific part.

[0023] Referring to Figures 1 to 4 To achieve the above object, the utility model provides the following technical scheme: a pneumatic actuator, including cylinder body 1, drive shaft 2, first piston plate 3, second piston plate 4, reset spring 5 and rack assembly 6, rack assembly 6 is provided with two groups, drive shaft 2 is through two rack assemblies 6 respectively with first piston plate 3 and second piston plate 4 linkage setting, first piston plate 3 and second piston plate 4 all are through reset spring 5 and cylinder body 1 abutment setting;

[0024] As Figure 2 The drive shaft 2 includes shaft body and gear, and the gear is meshed with the two groups of rack assemblies 6.

[0025] The rack assembly 6 includes a rack plate 61, a rack block 62 and a wear plate 63. The opposite sides of the rack plate 61 are respectively provided with a mounting groove 611 and a mounting hole 612. The mounting hole 612 is provided with multiple groups, and is arranged equidistantly along the length direction of the rack plate 61. The rack block 62 is provided with multiple groups, and is respectively detachably installed in the mounting hole 612.

[0026] The wear plate 63 is detachably installed in the mounting groove 611. The inner wall of the cylinder body 1 is provided with a guide groove. The wear plate 63 is slidably connected in the guide groove.

[0027] The design of the wear plate 63 and the guide groove can guide the movement of the rack assembly 6 and improve the stability of the movement of the rack assembly 6.

[0028] The detachable design of the rack block 62 can reduce the economic cost by only separately disassembling the individual rack block 62 when the rack block 62 needs to be replaced.

[0029] The utility model is further provided with multiple groups of oil storage grooves on the wear plate 63. The design of the oil storage groove can increase the oil storage capacity, has the function of oil storage lubrication, and improves the smoothness of the movement of the rack assembly 6.

[0030] The utility model is further provided with an oil conveying channel 613 on the rack plate 61, which is in communication with the mounting hole 612. The oil storage groove includes a first oil storage groove 631 and a second oil storage groove 632. The oil conveying channel 613 is in communication with the first oil storage groove 631.

[0031] The design of the structure can make part of lubricating oil flow to the rack block 62 area through the first oil storage groove 631, lubricate the rack block 62 and the gear when meshing, (a small part of lubricating oil will overflow during movement) and facilitate the disassembly of the rack block 62, avoid excessive clamping of the rack block 62 and the rack plate 61, and facilitate disassembly.

[0032] The utility model further sets up: first oil storage groove 631 and second oil storage groove 632 all set up with multiple groups, and all equidistantly arrange along the length direction of wear plate 63, first oil storage groove 631 and second oil storage groove 632 are sequentially arranged at intervals.

[0033] The utility model further sets up: mounting hole 612 is set up as convex structure, a plurality of sealing plates 7 are detachably installed on rack plate 61.

[0034] As shown in Figure 3 and Figure 4 , the design of the structure can ensure the stability of the installation of the rack block 62. And when the rack block 62 is inserted into the mounting hole 612, it is covered by the sealing plate 7, so that a relatively sealed cavity is formed in the mounting hole 612, avoiding or reducing the leakage of lubricating liquid.

[0035] The utility model further sets up: the mounting hole 612 is provided with a sealing layer. When the rack block 62 is installed into the mounting hole 612, it can be extruded with the sealing layer, strengthen the stability of the installation of the rack block 62, and can reduce the gap between the rack block 62 and the mounting hole 612, effectively avoid the leakage of lubricating liquid.

[0036] The utility model further sets up: the mounting groove 611 is set up along one side of rack plate 61 and penetrates, the sealing plate 8 is rotatably connected on rack plate 61, when wear plate 63 is slidably connected in guide groove, the groove wall of guide groove limits the rotation of sealing plate 8.

[0037] The design of the structure, as shown in Figure 3 and Figure 4 , the shape of one side of the sealing plate 8 is consistent with the shape of the wear plate 63, and is matched with the guide groove. When the wear plate 63 slides in the guide groove, the guide groove can limit the upper, lower and back three sides of the wear plate 63, and the upper, lower and back three sides of the sealing plate 8 will be limited in the same way. Therefore, the sealing plate 8 cannot rotate, which limits the wear plate 63 from left and right. When the sealing plate 8 is separated from the guide groove, the sealing effect of the guide groove can be achieved by rotating the sealing plate 8.

[0038] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A pneumatic actuator, comprising a cylinder body (1), a drive shaft (2), a first piston plate (3), a second piston plate (4), a return spring (5), and a rack assembly (6), wherein two sets of rack assemblies (6) are provided, and the drive shaft (2) is linked to the first piston plate (3) and the second piston plate (4) respectively through the two rack assemblies (6), wherein the first piston plate (3) and the second piston plate (4) are both abutted against the cylinder body (1) through the return spring (5); Its characteristics are: The rack assembly (6) includes a rack plate (61), rack blocks (62) and a wear-resistant plate (63). The rack plate (61) has mounting grooves (611) and mounting holes (612) on its opposite sides. Multiple sets of mounting holes (612) are provided and are arranged at equal intervals along the length of the rack plate (61). Multiple sets of rack blocks (62) are provided and are detachably installed in the mounting holes (612). The wear-resistant plate (63) is detachably installed in the mounting groove (611). A guide groove is provided on the inner wall of the cylinder (1), and the wear-resistant plate (63) is slidably connected in the guide groove.

2. A pneumatic actuator according to claim 1, characterized in that: The wear-resistant plate (63) is provided with multiple sets of oil storage tanks.

3. A pneumatic actuator according to claim 2, characterized in that: The rack plate (61) is provided with an oil delivery channel (613) communicating with the mounting hole (612). The oil storage tank includes a first oil storage tank (631) and a second oil storage tank (632). The oil delivery channel (613) is connected to the first oil storage tank (631).

4. A pneumatic actuator according to claim 3, characterized in that: Multiple sets of the first oil storage tank (631) and the second oil storage tank (632) are provided, and they are arranged at equal intervals along the length of the wear-resistant plate (63). The first oil storage tank (631) and the second oil storage tank (632) are arranged in sequence at intervals.

5. A pneumatic actuator according to claim 3, characterized in that: The mounting hole (612) is convex in shape, and several sealing plates (7) are detachably mounted on the rack plate (61).

6. A pneumatic actuator according to claim 5, characterized in that: The sealing plate (7) is convex in shape, and connecting holes are provided on both sides of the sealing plate (7). The rack plate (61) is provided with several screw holes.

7. A pneumatic actuator according to claim 5, characterized in that: A sealing layer is provided inside the mounting hole (612).

8. A pneumatic actuator according to any one of claims 1-7, characterized in that: The mounting groove (611) is provided through one side of the rack plate (61), and a sealing plate (8) is rotatably connected to the rack plate (61). When the wear-resistant plate (63) is slidably connected in the guide groove, the groove wall of the guide groove limits the rotation of the sealing plate (8).

Images