CN219712497U

CN219712497U - Rack and pinion type actuator

Info

Publication number: CN219712497U
Application number: CN202321226967.2U
Authority: CN
Inventors: 张武; 许佃明; 丁庆刚; 张其峰; 林强
Original assignee: Zhejiang Huaershi Automatic Control Instrument Valve Co ltd
Current assignee: Zhejiang Huaershi Automatic Control Instrument Valve Co ltd
Priority date: 2023-05-20
Filing date: 2023-05-20
Publication date: 2023-09-19
Anticipated expiration: 2033-05-20

Abstract

The utility model discloses a rack and pinion type actuator which comprises a cylinder body, wherein pistons are symmetrically arranged at two ends of the cylinder body and are connected in the cylinder body in a sliding manner, one end of each piston is connected with a wear-reducing ring A for the piston, one end of each wear-reducing ring A for the piston is connected with the piston, the other end of each wear-reducing ring A for the piston is connected with the inner wall of the cylinder body, the other end of each piston is connected with a wear-reducing ring B for the piston, one end of each wear-reducing ring B for the piston is connected with the piston, and the other end of each wear-reducing ring B for the piston is connected with the inner wall of the cylinder body. As a preferable technical scheme of the utility model, the rear end of the piston is connected with a rack. As a preferable technical scheme of the utility model, the center of the cylinder body is rotationally connected with a gear shaft, the axis of the gear shaft is collinear with the central axis of the cylinder body, and two ends of the gear shaft are respectively meshed with racks arranged on two pistons.

Description

Rack and pinion type actuator

Technical Field

The utility model relates to the technical field of automatic control of valves, in particular to a rack and pinion type actuator.

Background

The pneumatic actuator is an actuating device for driving the opening and closing or adjusting valve by air pressure, and is also called a pneumatic actuating mechanism or a pneumatic device, but is commonly called a pneumatic head. Pneumatic actuators are sometimes also equipped with certain auxiliary devices. Valve positioners and hand wheel mechanisms are commonly used. The valve positioner has the function of improving the performance of the actuator by utilizing a feedback principle, so that the actuator can accurately position according to the control signal of the controller.

In chinese patent CN218598777U, a pneumatic actuator with a waterproof structure is described, where a water blocking table is formed at a mounting hole of a housing to block accumulated water, and a groove formed by a connecting plate is matched with the water blocking table, so that the groove accommodates the water blocking table, and the connecting plate can prevent rainwater from drifting into a gap from above the gap, so that a good shielding effect is achieved, but no improvement is made on the condition of impacting the inner wall of a cylinder body in the movement of a piston.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides the rack-and-pinion type actuator, which can avoid the condition that the device structure is damaged due to the impact on the inside of a cylinder body in the process of moving a piston.

In order to solve the technical problems, the utility model provides the following technical scheme: the rack and pinion type actuator comprises a cylinder body, pistons are symmetrically arranged at two ends of the cylinder body and are slidably connected in the cylinder body, one end of each piston is connected with a wear-reducing ring A for each piston, one end of each wear-reducing ring A for each piston is connected with each piston, the other end of each wear-reducing ring A for each piston is connected with the inner wall of the cylinder body, the other end of each piston is connected with a wear-reducing ring B for each piston, one end of each wear-reducing ring B for each piston is connected with each piston, and the other end of each wear-reducing ring B for each piston is connected with the inner wall of the cylinder body.

As a preferable technical scheme of the utility model, the rear end of the piston is connected with a rack.

As a preferable technical scheme of the utility model, the center of the cylinder body is rotationally connected with a gear shaft, the axis of the gear shaft is collinear with the central axis of the cylinder body, and two ends of the gear shaft are respectively meshed with racks arranged on two pistons.

As a preferable technical scheme of the utility model, the top end of the gear shaft is connected with an adjusting block, the outer contour of the adjusting block is a disc with two protruding ends, the cylinder body is connected with an adjusting bolt, and the tail end of the adjusting bolt is contacted with the protruding parts of the adjusting block.

As a preferable technical scheme of the utility model, the top end of the gear shaft is connected with an upper shaft wear-reducing ring, the inner diameter of the upper shaft wear-reducing ring is connected with the gear shaft, the outer diameter of the upper shaft wear-reducing ring is connected with the inner wall of the cylinder body, the bottom end of the gear shaft is connected with a lower shaft wear-reducing ring, the inner diameter of the lower shaft wear-reducing ring is connected with the gear shaft, and the outer diameter of the lower shaft wear-reducing ring is connected with the inner wall of the cylinder body.

As a preferable technical scheme of the utility model, the piston is connected with a piston guide block which is connected in the cylinder body in a sliding way.

As a preferable technical scheme of the utility model, a guide groove is arranged in the cylinder body, and the piston guide block is connected in the guide groove in a sliding way.

As a preferable technical scheme of the utility model, the left end of the cylinder body is detachably connected with a left end cover, and the right end of the cylinder body is detachably connected with a right end cover.

As a preferable technical scheme of the utility model, the left end cover and the right end cover are respectively provided with connecting holes, the number of the connecting holes is the same, and the positions are in one-to-one correspondence.

As a preferable technical scheme of the utility model, sealing rings are respectively arranged on the left end cover and the right end cover.

Compared with the prior art, the utility model has the following beneficial effects:

1. the piston is protected by arranging the piston wear-reducing ring A and the piston wear-reducing ring B on the piston, and meanwhile, the friction force born by the piston in the moving process is reduced.

2. The upper and lower shaft wear-reducing rings are arranged on the gear shaft to protect the gear shaft and reduce friction force applied to the gear shaft in the motion process.

3. The piston guide block is arranged on the piston to ensure the movement track of the piston.

Drawings

FIG. 1 is a schematic diagram of a first embodiment of the present utility model;

FIG. 2 is a schematic diagram of a second embodiment of the present utility model;

fig. 3 is a schematic diagram of a third embodiment of the present utility model.

Wherein: a left end cap 1; a right end cap 2; a cylinder 3; a piston 4; a gear shaft 5; an adjusting block 6; a piston wear-reducing ring A7; an upper wear ring 8 for the shaft; a lower shaft wear ring 9; a piston wear ring B10; a piston guide block 11.

Detailed Description

In order that the manner in which the above recited features, objects and advantages of the present utility model are obtained will become readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. Based on the examples in the embodiments, those skilled in the art can obtain other examples without making any inventive effort, which fall within the scope of the utility model. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents, etc. used in the following examples are commercially available unless otherwise specified.

Examples:

example 1

The utility model discloses a rack and pinion type actuator, which is different from the traditional pneumatic actuator in that a stabilizing device is not arranged between a cylinder body 3 and a piston 4, so that the movement stability of the piston 4 is different in the movement process, and the stability of the movement of the piston 4 is improved while friction between the piston 4 and the inner wall of the cylinder body 3 is reduced by arranging a wear-reducing ring A7 for the piston and a wear-reducing ring B10 for the piston at the front end and the rear end of the piston 4 respectively.

As shown in fig. 1-3, the device comprises a cylinder body 3, pistons 4 are symmetrically arranged at the left end and the right end in the cylinder body 3, the pistons 4 are slidably connected in the cylinder body 3, a rack is connected to the bottom end of each piston 4, a gear shaft 5 is connected to the middle of the cylinder body 3, the rack is in threaded connection with the gear shaft 5, an adjusting block 6 is connected to the top end of each gear shaft 5, and the adjusting block 6 is rotatably connected to the top end of the cylinder body 3. The back of the piston 4 is provided with a spring piece for ensuring the meshing precision of the rack and the gear shaft 5. The two ends of the piston 4 are respectively connected with a piston wear-reducing ring A7 and a piston wear-reducing ring B10, the inner diameters of the piston wear-reducing ring A7 and the piston wear-reducing ring B10 are connected with the piston 4, the outer diameters of the piston wear-reducing ring A7 and the piston wear-reducing ring B10 are in contact with the inner wall of the cylinder body 3, the piston 4 can be supported, the phenomenon that the piston 4 is slightly deformed to collide with the inner wall of the cylinder body 3 to damage the structure of the device is avoided, meanwhile, the piston wear-reducing ring A7 and the piston wear-reducing ring B10 are supported by lubricating materials, and friction between the piston wear-reducing ring A7 and the inner wall of the cylinder body 3 is reduced, so that friction in the movement process of the piston 4 is reduced, and the operation efficiency of the device is improved.

Example 2

On the basis of example 1, as shown in fig. 1-2, in order to reduce the friction force applied during the rotation of the gear shaft 5, the upper and lower ends of the gear shaft 5 are respectively connected with an upper shaft-use wear-reducing ring 8 and a lower shaft-use wear-reducing ring 9, the contact area of the gear shaft 5 with the inner wall of the cylinder 3 is reduced by the upper shaft-use wear-reducing ring 8 and the lower shaft-use wear-reducing ring 9, and the friction force applied during the rotation of the gear shaft 5 is reduced by the upper shaft-use wear-reducing ring 8 and the lower shaft-use wear-reducing ring 9. Meanwhile, the upper antifriction ring 8 and the lower antifriction ring 9 for the shaft can protect the gear shaft 5, and the device structure damage caused by collision with the inner wall of the cylinder body 3 in the movement process of the gear shaft 5 is avoided.

As shown in fig. 3, the adjusting block 6 is a disc with two protruding ends, the cylinder 3 is externally connected with an adjusting bolt for controlling the rotation angle of the adjusting block 6, and by changing the distance between the two adjusting bolts and the adjusting block 6, the rotation angle of the adjusting block 6 clockwise and anticlockwise is changed, so that the rotation angle of the gear shaft 5 connected to the adjusting block 6 is changed, and the device is finely adjusted.

Example 3

On the basis of embodiment 2, as shown in fig. 2, a piston guide block 11 is connected to the piston 4, one end of the piston guide block 11 is connected to the piston 4, the other end of the piston guide block 11 is slidably connected to the inner wall of the cylinder 3, a guide groove is formed in the inner wall of the cylinder 3, the width of the guide groove is the same as that of the piston guide block 11, when the piston 4 moves in the cylinder 3, the piston guide block 11 moves in the guide groove to limit the piston 4, the movement direction of the piston 4 is prevented from being deviated, and meanwhile, the piston 4 is protected from being impacted on the inner wall of the cylinder 3 in the movement of the piston 4.

The left end cover 1 and the right end cover 2 are respectively connected to the left end and the right end of the cylinder body 3, and the left end cover 1 and the right end cover 2 are provided with connecting holes to ensure that the left end and the right end of the device can be connected at the appointed position. Sealing rings are respectively arranged on the left end cover 1 and the right end cover 2, so that the tightness of the device is ensured.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The rack and pinion type actuator comprises a cylinder body (3), wherein pistons (4) are symmetrically arranged at two ends of the cylinder body (3), and the pistons (4) are slidably connected in the cylinder body (3), and are characterized in that: one end of the piston (4) is connected with a wear-reducing ring A (7) for the piston, one end of the wear-reducing ring A (7) for the piston is connected with the piston (4), the other end of the wear-reducing ring A (7) for the piston is connected with the inner wall of the cylinder body (3), the other end of the piston (4) is connected with a wear-reducing ring B (10) for the piston, one end of the wear-reducing ring B (10) for the piston is connected with the piston (4), and the other end of the wear-reducing ring B (10) for the piston is connected with the inner wall of the cylinder body (3).

2. The rack and pinion actuator of claim 1 wherein: the rear end of the piston (4) is connected with a rack.

3. The rack and pinion actuator of claim 2 wherein: the center of the cylinder body (3) is rotationally connected with a gear shaft (5), the axis of the gear shaft (5) is collinear with the central axis of the cylinder body (3), and two ends of the gear shaft (5) are respectively meshed with racks arranged on the two pistons (4).

4. A rack and pinion actuator as defined in claim 3 wherein: the top of gear shaft (5) is connected with regulating block (6), and the outline of regulating block (6) is the bellied disc in both ends, be connected with adjusting bolt on cylinder body (3), adjusting bolt's tail end and the protruding contact of regulating block (6).

5. A rack and pinion actuator as defined in claim 3 wherein: the top of gear shaft (5) is connected with upper antifriction ring (8) for the axle, and the internal diameter of upper antifriction ring (8) for the axle is connected with gear shaft (5), and the external diameter of upper antifriction ring (8) for the axle is connected with cylinder body (3) inner wall, and the bottom of gear shaft (5) is connected with lower antifriction ring (9) for the axle, and the internal diameter of lower antifriction ring (9) for the axle is connected with gear shaft (5), and lower antifriction ring (9) external diameter for the axle is connected with cylinder body (3) inner wall.

6. The rack and pinion actuator of claim 1 wherein: the piston (4) is connected with a piston guide block (11), and the piston guide block (11) is slidably connected in the cylinder body (3).

7. The rack and pinion actuator of claim 6 wherein: the cylinder body (3) is internally provided with a guide groove, and the piston guide block (11) is slidably connected in the guide groove.

8. The rack and pinion actuator of claim 1 wherein: the left end of the cylinder body (3) is detachably connected with a left end cover (1), and the right end of the cylinder body (3) is detachably connected with a right end cover (2).

9. The rack and pinion actuator of claim 8 wherein: the left end cover (1) and the right end cover (2) are respectively provided with connecting holes, the number of the connecting holes is the same, and the positions are in one-to-one correspondence.

10. The rack and pinion actuator of claim 9 wherein: sealing rings are respectively arranged on the left end cover (1) and the right end cover (2).