Pressure maintaining equipment of hydraulic executive component

Abstract

The utility model discloses pressure maintaining equipment of a hydraulic executive component, which belongs to the technical field of hydraulic equipment and comprises a cylinder body, a piston and an executive rod, the piston is movably connected in the cylinder body, the executive rod is fixed on the surface of the piston, a partition plate is fixed on the inner wall of the lower half portion of the cylinder body, and a fixing column is fixed on the bottom wall of an inner cavity of the cylinder body. A connecting rod is movably connected to the outer portion of the fixing column, a flow guide sleeve is fixed to the outer wall of the connecting rod, a limiting block is fixed to the top of the fixing column, a supporting spring sleeves the outer portion of the limiting block, a groove is formed in the outer wall of one side of the cylinder body, and a compensation bin is fixed in the groove of the cylinder body; a through hole is formed in the outer wall of one side of the compensation bin, and a throttling pipe extending into the cylinder body is fixed in the through hole of the compensation bin. The pressure maintaining equipment of the hydraulic executive component is compact in structure and suitable for various complex environments, and the pressure maintaining stability of the hydraulic executive component can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydraulic equipment technical field, concretely relates to a kind of pressure maintaining equipment of hydraulic actuating element. BACKGROUND

[0002] Hydraulic equipment is generally composed of five parts, namely power element, actuating element, control element, auxiliary element and hydraulic oil, and the hydraulic equipment has large transmission force, is easy to transmit and configure, is widely applied in industry and civil industry, and the actuating element of hydraulic system, hydraulic cylinder and hydraulic motor, converts the pressure energy of liquid into mechanical energy, to obtain the required linear reciprocating motion or rotary motion, and can be modified at will according to the action designed to achieve the work required.

[0003] The existing hydraulic pressure maintaining equipment usually has problems such as complex structure and poor adaptability, especially in complex environment, the pressure fluctuation of hydraulic oil is easy to cause the action of actuating element to be out of alignment, and even cause safety hazard.In addition, the traditional pressure maintaining equipment lacks effective pressure compensation and flow guiding stability mechanism, and it is difficult to meet the demand of high-precision working condition. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of pressure maintaining equipment of hydraulic actuating element to solve the problems of insufficient pressure maintaining stability and complex structure of existing equipment in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of pressure maintaining equipment of hydraulic actuating element, including cylinder body, piston and execution rod, the piston is movably connected in cylinder body, the execution rod is fixed on the surface of piston, the lower half inner wall of cylinder body is fixed with baffle, and the bottom wall of cylinder body inner cavity is fixed with fixed column, the outer portion of fixed column is movably connected with connecting rod, and the outer wall of connecting rod is fixed with flow guide sleeve, the top of fixed column is fixed with limit block, and the outer portion of limit block is sleeved with support spring;

[0006] The outer wall of one side of cylinder body is provided with recess, the recess of cylinder body is fixed with compensation bin, the outer wall of one side of compensation bin is provided with through hole, and the through hole in compensation bin is fixed with throttling pipe extending into cylinder body.

[0007] In further embodiments, two limit columns are fixed in the compensation bin, the outer portion of limit column is movably connected with sealing plate, and the outer portion of limit column is sleeved with compression spring for supporting the sealing plate.

[0008] In further embodiments, the lower half outer wall of flow guide sleeve is fixed with limit ring, and the upper half of flow guide sleeve is provided with a plurality of flow guide holes.

[0009] In a further embodiment, a vent hole is provided on one side of the outer wall of the compensation chamber, and a vent pipe is fixed inside the vent hole of the compensation chamber.

[0010] In a further embodiment, a sealing ring is fixed to the inner wall of the upper half of the cylinder, and an oil inlet pipe is installed on one side of the outer wall of the cylinder.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] The pressure-holding device of this hydraulic actuator divides the cylinder into upper and lower chambers through a partition. Combined with the design of the fixed column, connecting rod and guide sleeve, it can stabilize the hydraulic oil flow path and reduce pressure fluctuations. At the same time, the guide sleeve's guide hole and limit ring design ensure uniform hydraulic oil flow. The support spring and compression spring enhance the device's vibration resistance, making it suitable for high-precision or vibration environments.

[0013] The sealing plate and compression spring inside the compensation chamber can dynamically respond to pressure changes, and achieve micro-compensation of hydraulic oil through the throttle tube to maintain stable pressure inside the cylinder. The sealing ring and vent pipe design prevent hydraulic oil leakage, while balancing the air pressure inside and outside the compensation chamber, extending the service life of the equipment. This pressure holding device for hydraulic actuators has a compact structure, is suitable for various complex environments, and can effectively improve the pressure holding stability of hydraulic actuators. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the fixing column and the flow guide sleeve of this utility model;

[0018] Figure 4 This is a cross-sectional view of the fixing column and the flow guide sleeve of this utility model;

[0019] Figure 5 This is a structural schematic diagram of the fixing column and connecting rod of this utility model;

[0020] Figure 6 This is a cross-sectional view of the compensation chamber of this utility model.

[0021] In the diagram: 1. Cylinder block; 2. Piston; 3. Actuator rod; 4. Sealing ring; 5. Oil inlet pipe; 6. Baffle plate; 7. Fixed post; 8. Connecting rod; 9. Guide sleeve; 10. Limiting block; 11. Support spring; 12. Limiting ring; 13. Compensation chamber; 14. Throttle pipe; 15. Limiting post; 16. Sealing plate; 17. Compression spring; 18. Vent pipe. Detailed Implementation

[0022] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0023] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0024] This utility model provides, for example Figures 1-6 The pressure holding device of the hydraulic actuator shown includes a cylinder 1, a piston 2 and an actuator rod 3. The piston 2 is movably connected inside the cylinder 1, and the actuator rod 3 is fixed to the surface of the piston 2. A sealing ring 4 is fixed to the inner wall of the upper half of the cylinder 1 by bolts to prevent hydraulic oil leakage and improve the sealing performance of the device. An oil inlet pipe 5 is installed on one side of the outer wall of the cylinder 1 through a flange for the input of hydraulic oil, and an oil outlet pipe is installed on the other side of the outer wall of the cylinder 1.

[0025] A partition 6 is welded to the inner wall of the lower half of the cylinder body 1, dividing the interior of the cylinder body 1 into upper and lower cavities, which facilitates the layered management and pressure control of hydraulic oil. A fixed column 7 is bolted to the bottom wall of the inner cavity of the cylinder body 1. A connecting rod 8 is movably connected to the outside of the fixed column 7. The connecting rod 8 can slide up and down along the fixed column 7. A guide sleeve 9 is welded to the outer wall of the connecting rod 8. A limit ring 12 is welded to the lower half of the outer wall of the guide sleeve 9 to limit the sliding range of the guide sleeve 9 and ensure its stable movement on the fixed column 7. Multiple guide holes are opened in the upper half of the guide sleeve 9 to facilitate the uniform flow of hydraulic oil. A limit block 10 is bolted to the top of the fixed column 7 to limit the highest position of the connecting rod 8 and prevent it from detaching from the fixed column 7. A support spring 11 is sleeved on the outside of the limit block 10. One end of the support spring 11 is connected to the limit block 10 and the other end is connected to the connecting rod 8 to provide elastic support and improve the vibration resistance of the equipment.

[0026] A groove is formed on one side of the outer wall of the cylinder body 1. A compensation chamber 13 is fixed in the groove by bolts. A through hole is formed on one side of the outer wall of the compensation chamber 13. A throttle pipe 14 extending into the cylinder body 1 is fixed in the through hole by threads to achieve micro-compensation of hydraulic oil and maintain the pressure stability in the cylinder body 1. Two limit posts 15 are fixed in the compensation chamber 13 by bolts. A sealing plate 16 is movably connected to the outside of the limit posts 15. The sealing plate 16 can slide along the limit posts 15. A compression spring 17 is sleeved on the outside of the limit posts 15 to support the sealing plate 16. One end of the compression spring 17 is connected to the inner wall of the compensation chamber 13 and the other end is connected to the sealing plate 16 to dynamically respond to pressure changes. A vent hole is formed on one side of the outer wall of the compensation chamber 13. A vent pipe 18 is fixed in the vent hole by threads to balance the air pressure inside and outside the compensation chamber 13 and ensure the normal movement of the sealing plate 16.

[0027] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The control method of this utility model is through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0028] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Working principle:

[0030] In the pressure-holding device of this hydraulic actuator, hydraulic oil enters the upper cavity of cylinder 1 through the oil inlet pipe 5, pushing piston 2 to move downward, thereby driving actuator rod 3 to move downward, realizing the conversion of hydraulic energy into mechanical energy. When the pressure inside cylinder 1 fluctuates, the partition 6 divides cylinder 1 into upper and lower cavities. The design of fixed column 7, connecting rod 8 and guide sleeve 9 stabilizes the flow path of hydraulic oil. The guide hole on guide sleeve 9 makes the hydraulic oil flow evenly and reduces pressure fluctuation.

[0031] When the pressure inside cylinder 1 decreases, the sealing plate 16 inside the compensation chamber 13 moves under the action of the compression spring 17, slowly injecting the hydraulic oil inside the compensation chamber 13 into cylinder 1 through the throttle pipe 14 to achieve pressure compensation. When the pressure inside cylinder 1 is too high, the hydraulic oil enters the compensation chamber 13 through the throttle pipe 14, pushing the sealing plate 16 to move and compressing the compression spring 17, thereby maintaining the pressure stability inside cylinder 1. At the same time, it pushes the guide sleeve 9 to move downward, and the guide hole on the guide sleeve 9 moves to below the partition plate 6 to prevent hydraulic oil from entering cylinder 1.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure-holding device for a hydraulic actuator, comprising a cylinder (1), a piston (2), and an actuator rod (3), characterized in that: The piston (2) is movably connected to the cylinder (1), the actuator (3) is fixed to the surface of the piston (2), the lower half of the inner wall of the cylinder (1) is fixed with a partition (6), and the bottom wall of the inner cavity of the cylinder (1) is fixed with a fixing column (7). The fixing column (7) is movably connected to the outside of the fixing column (7), and the outer wall of the connecting rod (8) is fixed with a guide sleeve (9). The top of the fixing column (7) is fixed with a limit block (10), and the outside of the limit block (10) is sleeved with a support spring (11). A groove is opened on one side of the outer wall of the cylinder (1), and a compensation chamber (13) is fixed in the groove of the cylinder (1). A through hole is opened on one side of the outer wall of the compensation chamber (13), and a throttling tube (14) extending into the cylinder (1) is fixed in the through hole of the compensation chamber (13).

2. The pressure-holding device for a hydraulic actuator according to claim 1, characterized in that: The compensation chamber (13) has two fixed limiting posts (15), and the limiting posts (15) are movably connected to a sealing plate (16), and a compression spring (17) for supporting the sealing plate (16) is sleeved on the outside of the limiting posts (15).

3. The pressure-holding device for a hydraulic actuator according to claim 1, characterized in that: The lower half of the guide sleeve (9) is fixed with a limit ring (12), and the upper half of the guide sleeve (9) is provided with multiple guide holes.

4. The pressure-holding device for a hydraulic actuator according to claim 2, characterized in that: A ventilation hole is provided on one side of the outer wall of the compensation chamber (13), and a ventilation pipe (18) is fixed inside the ventilation hole of the compensation chamber (13).

5. The pressure-holding device for a hydraulic actuator according to claim 1, characterized in that: A sealing ring (4) is fixed to the inner wall of the upper half of the cylinder (1), and an oil inlet pipe (5) is installed on the outer wall of one side of the cylinder (1).

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