Internal compression spring of hydraulic actuator

Abstract

The utility model provides an internal compression spring of a hydraulic actuator, which relates to the technical field of hydraulic actuators, and comprises a spring body, one end of a first plug in the spring is connected with a sliding sleeve, the inner wall of the sliding sleeve is connected with a sliding seat in a sliding manner, one side of the sliding seat is connected with a guide rod, and the guide rod is connected with a second plug. The end, away from the guide rod, of the four-corner head is connected with a screw head, a square hole is formed in the inner side of the second plug, a compression spring in the hydraulic actuator is matched with the guide rod through the sliding sleeve, the sliding base is guided through the sliding sleeve, the stability of the sliding base in the moving position is kept, the sliding base provides supporting force for the guide rod, and therefore the stability of the hydraulic actuator is improved. And the guide rod receives power generated when the spring body retracts in a reciprocating mode, the stability of the spring body is kept through supporting of the guide rod, the sliding base and the sliding sleeve when the spring body retracts in a reciprocating mode, the inclination angle generated when the spring body retracts in a reciprocating mode is reduced, and the service life of the spring body is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compression spring, concretely is a kind of compression spring inside hydraulic actuator, belong to hydraulic actuator technical field. BACKGROUND

[0002] Hydraulic actuator is a kind of device that converts hydraulic energy into mechanical energy, and the hydraulic actuator converts the pressure energy of hydraulic oil into mechanical energy to realize linear or rotary motion. The hydraulic oil enters the cylinder or motor of the actuator under the action of pressure, pushes the piston or rotor to move, thereby generating force or torque. The piston is pushed to move linearly in the cylinder by the pressure of the hydraulic oil to realize force output. Hydraulic actuators are widely used in industrial machinery, construction machinery and aerospace fields.

[0003] The spring is installed inside the hydraulic actuator cylinder. When the piston moves, it provides elastic support for the piston. When the piston moves inside the cylinder, the spring is compressed. The compressed spring stores elastic potential energy. After the piston loses the driving force outside, the spring pushes the piston back to its original position. The spring provides power for the piston to return to its original position by extending and retracting reciprocally.

[0004] The diameter of the spring is smaller than the diameter of the hydraulic actuator cylinder. When the spring moves back and forth, the outside of the spring does not come into contact with the hydraulic actuator cylinder. The spring may tilt inside the hydraulic actuator cylinder, causing the spring to be subjected to uneven force. Over time, this may cause the spring to break, reducing its service life. To solve the above problems, we provide a compression spring inside a hydraulic actuator. INVENTION CONTENTS

[0005] To solve the above problems, the utility model provides a compression spring inside a hydraulic actuator to solve the above problems. The specific technical scheme is as follows:

[0006] A compression spring inside a hydraulic actuator includes a spring body. One end of the spring body is detachably connected to a first plug. The other end of the spring body is detachably connected to a second plug. The first plug is connected to a sliding sleeve at one end inside the spring. The inner wall of the sliding sleeve is slidably connected to a sliding seat. One side of the sliding seat is connected to a guide rod. The end of the guide rod away from the sliding seat is connected to a four-corner head. The end of the four-corner head away from the guide rod is connected to a wire head. The inside of the second plug is provided with a square hole. The inner wall of the square hole is in contact with the outer surface of the four-corner head. The outer surface of the wire head is threadedly connected to a hexagonal head.

[0007] Preferably, the inside of the sliding sleeve is provided with a vent hole, which communicates with the inside of the sliding sleeve.

[0008] Preferably, the inside of the sliding sleeve is provided with four sliding channels, which are arranged in a circular array.

[0009] Preferably, the outer surface of the slide block is connected to a number of sliders equal to the number of slide tracks, and the inner side of the slider is provided with a receiving groove.

[0010] Preferably, the inner wall of the receiving groove is connected to a plurality of support shafts, and the plurality of support shafts are arranged at equal distances. Rollers are rotatably connected to the outer surfaces of the plurality of support shafts, and the outer surfaces of the rollers are in contact with the inner wall of the slide.

[0011] Preferably, a cover plate is detachably connected to the top of the sliding sleeve, one side of the cover plate is in contact with one end of the sliding block, and the inner wall of the cover plate is slidably connected to the outer surface of the guide rod.

[0012] Preferably, the inner wall of the second plug is threaded with a cap, and the inner side of the cap has a hexagonal groove.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The internal compression spring of this hydraulic actuator, through the cooperation of the sliding sleeve, the sliding seat, and the guide rod, guides the sliding seat through the sliding sleeve, maintaining the stability of the sliding seat when it moves. The sliding seat provides support force for the guide rod, making the guide rod stable. The guide rod receives the power of the spring body during reciprocating contraction. During the reciprocating contraction of the spring body, the stability of the spring body is maintained through the support of the guide rod, the sliding seat, and the sliding sleeve, reducing the tilt angle of the spring body during reciprocating contraction and improving the service life of the spring body.

[0015] 2. The internal compression spring of this hydraulic actuator, through the cooperation between the slider, slide rail and roller, guides the roller through the slide rail to maintain the stability of the roller. The slider contacts the slide rail through the rotation of the roller, reducing the friction between the slide rail and the slider, making it easier for the slider to move. The guide of the roller by the slide rail maintains the stability of the slide block, so that the slide block can only slide along a straight trajectory, preventing the slide block from rotating and causing insufficient stability, and maintaining the stability of the slide block when moving. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the first plug structure in this utility model;

[0018] Figure 3 This is a schematic diagram of the guide rod structure in this utility model;

[0019] Figure 4 This is a schematic diagram of the slide block structure in this utility model;

[0020] Figure 5 This is a schematic diagram of the sliding sleeve structure in this utility model;

[0021] Figure 6 It is the cap structure schematic view in the utility model.

[0022] Figure 7 It is the second plug structure schematic view in the utility model.

[0023] BRIEF DESCRIPTION OF DRAWINGS: 1, spring body;2, first plug;3, second plug;4, sliding sleeve;5, sliding seat;6, guide rod;7, four corners head;8, silk head;9, four square hole;10, hexagonal head;11, air hole;12, slide;13, sliding block;14, containing groove;15, support shaft;16, gyro wheel;17, cover plate;18, cap;19, hexagonal groove. DETAILED DESCRIPTION

[0024] The utility model will be further described with reference to the drawings.

[0025] Please refer to Figures 1-7 A kind of hydraulic actuator internal compression spring, including spring body 1, one end of spring body 1 is detachably connected with first plug 2, the other end of spring body 1 is detachably connected with second plug 3, and the elastic propulsive force of spring body 1 is accepted by first plug 2 and second plug 3, one end of first plug 2 located in spring is connected with sliding sleeve 4, and sliding sleeve 4 is supported by first plug 2, to maintain the stability of sliding sleeve 4.

[0026] The inner wall of sliding sleeve 4 is slidably connected with sliding seat 5, and sliding seat 5 is supported by sliding sleeve 4, to guide the sliding direction of sliding seat 5, and one side of sliding seat 5 is connected with guide rod 6, and guide rod 6 is supported by sliding seat 5, to maintain the stability of guide rod 6 when sliding.

[0027] The end of guide rod 6 away from sliding seat 5 is connected with four corners head 7, and four corners head 7 is wrapped by four square hole 9, to limit the rotation of guide rod 6, so that guide rod 6 only has straight line sliding movement track, and the end of four corners head 7 away from guide rod 6 is connected with silk head 8, the inside of second plug 3 is provided with four square hole 9, the inner wall of four square hole 9 is in contact with the outer surface of four corners head 7, and the outer surface of silk head 8 is screw-connected with hexagonal head 10, which is connected with silk head 8 by hexagonal head 10, to maintain the stability of silk head 8, and prevent silk head 8 from moving position.

[0028] The inside of sliding sleeve 4 is provided with air hole 11, and air hole 11 is communicated with the inside of sliding sleeve 4, so that the gas in the inside of sliding sleeve 4 can be discharged to the outside, and the gas is sucked into sliding sleeve 4 when sliding seat 5 reciprocating slides, so that the gas is easy to enter and exit through air hole 11, to prevent the inside of sliding sleeve 4 from being in negative pressure and high pressure state.

[0029] The inner side of the sliding sleeve 4 is provided with four sliding grooves 12 arranged in a circular array, the sliding grooves 12 guide the rollers 16 and keep the stability of the rollers 16, the guidance of the rollers 16 by the sliding grooves 12 keeps the stability of the sliding seat 5, the sliding seat 5 can only slide in a straight line to prevent the rotation of the sliding seat 5 from causing insufficient stability, the outer surface of the sliding seat 5 is connected with sliding blocks 13 equal in number to the sliding grooves 12, the inner side of the sliding block 13 is provided with a receiving groove 14, the space generated by the receiving groove 14 is used for accommodating the rollers 16, the inner wall of the receiving groove 14 is connected with a plurality of support shafts 15 arranged at equal distances, the outer surface of each of the support shafts 15 is rotatably connected with a roller 16, the outer surface of the roller 16 is in contact with the inner wall of the sliding groove 12, the support shafts 15 provide support for the rollers 16 and keep the stability of the rollers 16 during rotation, the sliding block 13 rotates with the rollers 16 to contact the sliding groove 12, which reduces the friction between the sliding groove 12 and the sliding block 13 and facilitates the movement of the sliding block 13.

[0030] The top end of the sliding sleeve 4 is detachably connected with a cover plate 17, one side of the cover plate 17 is in contact with one end of the sliding seat 5, and the inner wall of the cover plate 17 is slidably connected with the outer surface of the guide rod 6, the cover plate 17 blocks the sliding seat 5 to prevent the sliding seat 5 from being separated from the sliding sleeve 4.

[0031] The inner wall of the second plug 3 is threadedly connected with a cap 18, the inner side of the cap 18 is provided with a hexagonal groove 19, the cap 18 seals the opening of the second plug 3 to prevent dust or sundries from entering the interior of the second plug 3, and the hexagonal groove 19 facilitates the disassembly of the cap 18 by using a hexagonal wrench.

[0032] In use, first, when the spring is compressed, the spring body 1 is contracted, the spring body 1 is contracted at the same time as the second plug 3 is moved, the second plug 3 drives the guide rod 6 to move, the guide rod 6 drives the sliding seat 5 to move in the sliding sleeve 4, the sliding seat 5 moves at the same time as the rollers 16 rotate in the sliding grooves 12, the space in the sliding sleeve 4 is compressed after the sliding seat 5 moves, the air in the sliding sleeve 4 is discharged through the air vent 11, the spring body 1 loses pressure outside, the guide rod 6 receives the elastic driving force of the spring body 1 through the hexagonal head 10, and the guide rod 6 drives the sliding seat 5 to reset.

[0033] The technical principles of the utility model are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the utility model and cannot be interpreted in any way as a limitation on the protection scope of the utility model. Based on the explanations herein, those skilled in the art can think of other specific embodiments of the utility model without creative labor, and these embodiments will all fall within the protection scope of the claims of the utility model.

Claims

1. Hydraulic actuator internal compression spring, comprising a spring body (1), characterized in that: One end of the spring body (1) is detachably connected with a first plug (2), the other end of the spring body (1) is detachably connected with a second plug (3), the first plug (2) is connected with a sliding sleeve (4) at the end inside the spring, the inner wall of the sliding sleeve (4) is slidably connected with a sliding seat (5), one side of the sliding seat (5) is connected with a guide rod (6), the end of the guide rod (6) away from the sliding seat (5) is connected with a four-corner head (7), the end of the four-corner head (7) away from the guide rod (6) is connected with a wire head (8), the inner side of the second plug (3) is provided with a square hole (9), the inner wall of the square hole (9) is in contact with the outer surface of the four-corner head (7), the outer surface of the wire head (8) is threadedly connected with a hexagonal head (10).

2. A hydraulic actuator internal compression spring according to claim 1, wherein: The inner side of the sliding sleeve (4) is provided with a ventilation hole (11), which communicates with the inside of the sliding sleeve (4).

3. A hydraulic actuator internal compression spring according to claim 1, wherein: The inner side of the sliding sleeve (4) is provided with four slide ways (12), which are circularly arrayed.

4. A hydraulic actuator internal compression spring according to claim 3, wherein: The outer surface of the sliding seat (5) is connected with the same number of sliding blocks (13) as the slide ways (12), the inner side of the sliding block (13) is provided with a containing groove (14).

5. A hydraulic actuator internal compression spring according to claim 4, wherein: The inner wall of the containing groove (14) is connected with a plurality of support shafts (15), which are equidistantly arranged, the outer surface of each of the plurality of support shafts (15) is rotatably connected with a roller (16), the outer surface of the roller (16) is in contact with the inner wall of the slide way (12).

6. A hydraulic actuator internal compression spring according to claim 1, wherein: The top end of the sliding sleeve (4) is detachably connected with a cover plate (17), one side of the cover plate (17) is in contact with one end of the sliding seat (5), the inner wall of the cover plate (17) is slidably connected with the outer surface of the guide rod (6).

7. A hydraulic actuator internal compression spring according to claim 1, wherein: The inner wall of the second plug (3) is threadedly connected with a cap (18), the inner side of the cap (18) is provided with a hexagonal groove (19).

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