CN219570713U - High-energy oil pressure buffer - Google Patents

Abstract

The utility model provides a high-energy oil pressure buffer, which comprises a cylinder body, a piston head and a piston rod, wherein a closed hydraulic cavity is arranged in the cylinder body, the piston head is movably arranged in the hydraulic cavity of the cylinder body along the axial direction, the piston rod is inserted on the cylinder body, the lower end of the piston rod is connected with the piston head, the upper end of the piston rod penetrates through the cylinder body and is positioned at the outer side of the cylinder body, the piston head divides the hydraulic cavity into a pressure accumulation cavity and a pressure cavity, the cavity wall inner diameter of the pressure accumulation cavity is larger than the cavity wall inner diameter of the pressure cavity, the piston head is in sliding fit in the pressure cavity, a plurality of overflow holes communicated with the pressure accumulation cavity and the pressure cavity are arranged on the piston head, and when the piston head moves towards the pressure cavity, the overflow holes are closed one by one. The hydraulic buffer of this technical scheme can increase the buffer capacity, improves the buffering effect.

Description

High-energy oil pressure buffer

Technical Field

The utility model relates to the technical field of oil pressure buffers, in particular to a high-energy oil pressure buffer.

Background

The hydraulic buffer is an energy absorbing device, the working principle is that kinetic energy given by an external object is converted into heat energy and released into the atmosphere, and the hydraulic buffer has the advantages of small volume, large energy absorption, convenient installation and the like, is widely applied to industries such as automatic machinery, aerospace, military industry, automobiles and the like, can reduce vibration and noise generated in the mechanical operation process, improves the efficiency of the machinery, increases the productivity, effectively prolongs the service life of the machinery and reduces the maintenance cost. At present, the oil pressure buffer is an energy absorbing device which can provide most convenient operation and control for various devices.

The Chinese patent with the publication number of CN205715422U discloses a high-pressure heavy high-speed impact buffer, which comprises an external pressure cylinder and an internal pressure cylinder, wherein an optical head screw is arranged at the rear end of the external pressure cylinder, steel balls are arranged on the optical head screw, a plurality of oil drain holes are formed in the internal pressure cylinder, the oil drain holes are respectively formed in the upper side and the lower side of the internal pressure cylinder, an oil return hole is further formed in the upper side of the internal pressure cylinder, a spring seat, a piston and a piston rod are arranged in the internal pressure cylinder, the spring is connected to the spring seat, a connecting rod is arranged on the piston, a retaining ring is arranged at one end of the connecting rod, the piston is connected with the piston rod, and oil storage cotton, an O-shaped ring, an oil seal and a guide bearing are respectively arranged on the upper side and the lower side of the piston rod. Because of the existence of the internal pressure cylinder in the buffer, the area of the piston pressure oil is limited, namely, the volume of hydraulic oil discharged by the piston in the same height stroke is smaller, so that the buffer capacity is reduced, the absorption of external impact energy is small, and the buffer effect is reduced.

Disclosure of Invention

The utility model mainly aims to provide a high-energy oil pressure buffer, which comprises but is not limited to solving the technical problem that the buffer effect is reduced due to small buffer capacity in the prior art.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a high energy oil pressure buffer, includes cylinder body, piston head and piston rod, be equipped with inclosed hydraulic pressure chamber in the cylinder body, the piston head is in along the axial activity setting in the hydraulic pressure chamber of cylinder body, the piston rod cartridge is on the cylinder body, the piston rod lower extreme is connected with the piston head, the piston rod upper end passes the cylinder body and is located the outside of cylinder body, the piston head will the hydraulic pressure chamber is divided into pressure accumulation chamber and pressure chamber, the chamber wall internal diameter of pressure accumulation chamber is greater than the chamber wall internal diameter of pressure chamber, piston head sliding fit is in the pressure chamber, be equipped with on the piston head and be used for the intercommunication a plurality of overflow holes in pressure accumulation chamber and pressure chamber when the piston head moves towards the pressure chamber, a plurality of overflow holes are closed one by one.

The beneficial effects of the utility model are as follows: when the upper end of the piston rod is impacted by external force, the piston rod pushes the piston head to move downwards, hydraulic oil in the pressure cavity is extruded, and flows into the pressure accumulation cavity from the pressure cavity through overflow holes on the piston head after being pressed, and the overflow holes are closed one by one along with the downward movement of the piston head, so that the area of a liquid passing channel between the pressure cavity and the pressure accumulation cavity is gradually reduced, the generated damping force is increased along with the gradual increase of the damping force, namely the energy absorption rate is gradually increased, and the piston rod has better damping characteristics. The internal pressure cylinder is canceled in the cylinder body, so that the pressure oil area of the piston head is increased, the buffer capacity is increased, and the buffer effect of the oil pressure buffer is improved.

Preferably, the cylinder body comprises a cylinder barrel and a cylinder cover, the cylinder cover is detachably connected to the opening end of the cylinder barrel, a through hole for a piston rod to pass through is formed in the cylinder cover, and a sealing part for preventing hydraulic oil from flowing out of the hydraulic cavity is arranged in the cylinder barrel. The cylinder cover is disassembled and assembled, so that the piston head is conveniently installed in the hydraulic cavity of the cylinder body, and the buffer is convenient to disassemble and assemble.

Preferably, the cylinder barrel and the cylinder cover are connected through threads. Through adopting above-mentioned structure, realize the dismouting of cylinder and cylinder cap, facilitate the use.

Preferably, a guide sleeve for guiding the piston rod is fixedly arranged in the pressure accumulation cavity, a guide hole is formed in the guide sleeve, and the piston rod is slidably arranged in the guide hole in a penetrating mode. By adopting the structure, the piston rod can move reliably and guided, and the stability of the piston head moving is improved.

Preferably, the guide sleeve is provided with pressure accumulating cotton, the pressure accumulating cotton is arranged in a pressure accumulating groove of the guide sleeve, and the pressure accumulating groove is communicated with the pressure accumulating cavity. Through adopting above-mentioned structure, make hydraulic oil reliably accumulate in the pressure accumulation intracavity, alleviateed the maintenance volume simultaneously, prolonged the life of oil pressure buffer.

Preferably, the outer peripheral wall of the guide sleeve is attached to the inner peripheral wall of the cylinder barrel, the inner peripheral wall of the guide hole is attached to the outer peripheral wall of the piston rod, and the sealing part comprises a first sealing ring arranged on the outer peripheral wall of the guide sleeve and a second sealing ring arranged on the inner peripheral wall of the guide hole. By adopting the structure, the sealing reliability of the hydraulic cavity is improved.

Preferably, a return spring is arranged in the pressure cavity, the upper end of the return spring is propped against the piston head, and the lower end of the return spring is propped against the bottom wall of the pressure cavity. By adopting the structure, after the external force is removed, the piston head is favorable to resetting, and the buffer is convenient to use next time.

Preferably, a positioning groove for positioning the return spring is arranged on the piston head, and the positioning groove is communicated with the overflow hole. Through adopting above-mentioned structure, improve reset spring's reset stability, increase piston head pressure oil's area of contact simultaneously, increase buffer capacity, improve the buffering effect.

Drawings

FIG. 1 is a schematic diagram of a high energy hydraulic buffer according to the present utility model;

reference numerals illustrate:

1. a cylinder; 11. a cylinder; 12. a cylinder cover; 13. a pressure accumulation cavity; 14. a pressure chamber; 2. a piston head; 21. an overflow aperture; 22. a positioning groove; 3. a piston rod; 4. a guide sleeve; 5. pressure accumulating cotton; 6. a first seal ring; 7. a second seal ring; 8. and a return spring.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "left", "right", "front", "rear", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

As shown in fig. 1, the utility model provides a high-energy oil pressure buffer, which comprises a cylinder body 1, a piston head 2 and a piston rod 3, wherein a closed hydraulic cavity is arranged in the cylinder body 1, the piston head 2 is movably arranged in the hydraulic cavity of the cylinder body 1 along the axial direction, the piston rod 3 is inserted on the cylinder body 1, the lower end of the piston rod 3 is connected with the piston head 2, the upper end of the piston rod 3 penetrates through the cylinder body 1 and is positioned at the outer side of the cylinder body 1, the piston head 2 divides the hydraulic cavity into an accumulating cavity 13 and a pressure cavity 14 which are arranged along the axial direction, the piston rod 3 is arranged close to the accumulating cavity 13, the inner diameter of the cavity wall of the accumulating cavity 13 is larger than the inner diameter of the cavity wall of the pressure cavity 14, the piston head 2 is in sliding fit in the pressure cavity 14, a plurality of overflow holes 21 used for communicating the accumulating cavity 13 and the pressure cavity 14 are arranged on the side wall of the piston head 2 at intervals along the axial direction, and when the piston head 2 moves towards the pressure cavity 14, the overflow holes 21 are closed one by one.

Specifically, cylinder body 1 includes cylinder 11 and cylinder cap 12, the open end at cylinder 11 is detachably connected to cylinder cap 12, be equipped with the through-hole that supplies piston rod 3 to pass on the cylinder cap 12, be equipped with the sealing portion that is used for preventing that hydraulic oil from flowing out from the hydraulic pressure chamber in the cylinder 11, through dismouting cylinder cap 12, do benefit to the hydraulic pressure intracavity that piston head 2 loaded into cylinder body 1, make things convenient for the dismouting of oil buffer. The cylinder cover 12 is provided with external threads, the cylinder 11 is provided with internal threads, and the internal threads are locked with the external threads in a matched mode.

In order to improve the stability of the movement of the piston head 2, a guide sleeve 4 for guiding the piston rod 3 is fixedly arranged in the pressure accumulation cavity 13, a guide hole is formed in the guide sleeve 4, and the piston rod 3 is slidably arranged in the guide hole in a penetrating manner, so that the movement of the piston rod 3 has reliable guidance.

In order to reliably accumulate the hydraulic oil in the pressure accumulation cavity 13, the guide sleeve 4 is provided with pressure accumulation cotton 5, the pressure accumulation cotton 5 is installed in a pressure accumulation groove of the guide sleeve 4, and the pressure accumulation groove is communicated with the pressure accumulation cavity 13, so that maintenance amount is reduced, and the service life of the hydraulic buffer is prolonged.

In order to improve the leakproofness of cylinder body 1 hydraulic pressure chamber, the laminating of the outer perisporium of uide bushing 4 and the inner perisporium of cylinder 11, the inner perisporium of guiding hole and the laminating of piston rod 3 outer perisporium, sealing portion is including setting up the first sealing washer 6 on the outer perisporium of uide bushing 4 and setting up the second sealing washer 7 on the guiding hole inner perisporium. The first sealing ring 6 prevents hydraulic oil in the hydraulic cavity from flowing out from the fit gap between the guide sleeve 4 and the cylinder barrel 11, and the second sealing ring 7 prevents hydraulic oil in the hydraulic cavity from flowing out from the fit gap between the guide sleeve 4 and the piston rod 3.

In order to facilitate the next use of the oil pressure buffer, a return spring 8 is installed in the pressure cavity 14, the upper end of the return spring 8 abuts against the piston head 2, and the lower end of the return spring 8 abuts against the bottom wall of the pressure cavity 14, so that the return of the piston head 2 is facilitated after the external force is removed.

In order to improve the resetting stability of the resetting spring 8, the piston head 2 is provided with a positioning groove 22 for positioning the resetting spring 8, the positioning groove 22 is communicated with the overflow hole 21, and meanwhile, the contact area of the piston head 2 with the pressurized oil is increased, the buffering capacity is increased, and the buffering effect is improved.

Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the utility model.

Claims (8)

1. The utility model provides a high energy oil pressure buffer, includes cylinder body (1), piston head (2) and piston rod (3), be equipped with inclosed hydraulic pressure chamber in cylinder body (1), piston head (2) are in along the axial activity setting in the hydraulic pressure chamber of cylinder body (1), piston rod (3) cartridge is on cylinder body (1), piston rod (3) lower extreme is connected with piston head (2), cylinder body (1) are passed to piston rod (3) upper end and are located the outside of cylinder body (1), a serial communication port, piston head (2) will the hydraulic pressure chamber separates into pressure accumulation chamber (13) and pressure chamber (14), piston rod (3) are close to pressure accumulation chamber (13) and set up, the chamber wall internal diameter of pressure accumulation chamber (13) is greater than the chamber wall internal diameter of pressure chamber (14), piston head (2) sliding fit is in pressure chamber (14), be equipped with on piston head (2) and be used for the intercommunication pressure accumulation chamber (13) and pressure chamber (14) a plurality of overflow hole (21) when pressure chamber (2) are removed towards pressure chamber (14) a plurality of overflow hole (21) are closed one by one.

2. A high energy oil pressure buffer according to claim 1, characterized in that the cylinder (1) comprises a cylinder (11) and a cylinder cover (12), the cylinder cover (12) is detachably connected to the opening end of the cylinder (11), the cylinder cover (12) is provided with a through hole for the piston rod (3) to pass through, and a sealing part for preventing hydraulic oil from flowing out from the hydraulic cavity is arranged in the cylinder (11).

3. A high energy oil pressure buffer according to claim 2, characterized in that the cylinder (11) and the cylinder head (12) are connected by means of threads.

4. A high-energy oil pressure buffer according to claim 2, characterized in that a guide sleeve (4) for guiding the piston rod (3) is fixedly arranged in the pressure accumulation cavity (13), a guide hole is arranged on the guide sleeve (4), and the piston rod (3) is slidably arranged in the guide hole in a penetrating manner.

5. The high-energy oil pressure buffer according to claim 4, wherein the guide sleeve (4) is provided with pressure accumulating cotton (5), the pressure accumulating cotton (5) is installed in a pressure accumulating groove of the guide sleeve (4), and the pressure accumulating groove is communicated with the pressure accumulating cavity (13).

6. A high energy hydraulic buffer according to claim 4 wherein the outer peripheral wall of the guide sleeve (4) is attached to the inner peripheral wall of the cylinder (11), the inner peripheral wall of the guide hole is attached to the outer peripheral wall of the piston rod (3), and the sealing portion comprises a first sealing ring (6) provided on the outer peripheral wall of the guide sleeve (4) and a second sealing ring (7) provided on the inner peripheral wall of the guide hole.

7. A high energy oil pressure buffer according to claim 1, characterized in that a return spring (8) is mounted in the pressure chamber (14), the upper end of the return spring (8) is abutted against the piston head (2), and the lower end of the return spring (8) is abutted against the bottom wall of the pressure chamber (14).

8. A high energy oil pressure buffer according to claim 7, characterized in that the piston head (2) is provided with a positioning groove (22) for positioning the return spring (8), said positioning groove (22) being in communication with the overflow aperture (21).