A granular buffer

Abstract

A granular buffer belongs to the technical field of hydraulic buffers. The present invention includes a buffer box, a buffer cylinder is connected to the buffer box, the bottom end of the buffer cylinder is connected to the bottom side of the buffer box, the buffer cylinder passes through the buffer box and is connected to a solid cover at the top, a buffer rod is movably provided through the solid cover, the buffer rod extends into the buffer cylinder, a buffer reset spring is connected between the buffer rod and the buffer box, a plurality of oil holes are provided on the side wall of the buffer cylinder, the buffer box is filled with granular matter outside the buffer cylinder, and the buffer box and the buffer cylinder are both filled with hydraulic oil. The present invention can significantly reduce the impact force of the equipment from the impact member, thereby enhancing the buffering effect.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic buffers, and in particular relates to a granular buffer. Background Art

[0002] Buffers can generally be divided into pneumatic buffers and hydraulic buffers. Hydraulic buffers act as buffers for high-speed moving workpieces, thereby reducing machine vibration and noise, so hydraulic buffers are also called shock absorbers. Hydraulic buffers can accelerate the frequency of mechanical movements, increase production, and extend the life of machinery. Traditional hydraulic buffers have a small structure and only have oil holes and springs as shock-absorbing modules. When the buffer is subjected to external force, the oil generates a huge impact force through the oil hole. The buffer set inside may damage the equipment and affect the service life of the entire equipment. Summary of the invention

[0003] The present invention aims at the above-mentioned problems, makes up for the deficiencies of the prior art, and provides a granular buffer; compared with the existing hydraulic buffer, the present invention can greatly reduce the impact force of the equipment from the impact piece, thereby enhancing the buffering effect.

[0004] To achieve the above purpose, the present invention adopts the following technical solution.

[0005] The present invention provides a granular buffer, characterized in that it comprises a buffer box body, a buffer cylinder is connected to the buffer box body, the bottom end of the buffer cylinder is connected to the bottom side of the buffer box body, the buffer cylinder passes through the buffer box body and is connected to a solid cover at the top end, a buffer rod is movably arranged through the solid cover, the buffer rod extends into the buffer cylinder, a buffer return spring is connected between the buffer rod and the buffer box body, a plurality of oil holes are arranged on the side wall of the buffer cylinder, the buffer box body is filled with granular matter outside the buffer cylinder, and the buffer box body and the buffer cylinder are both filled with hydraulic oil.

[0006] Furthermore, the oil-through hole is arranged on the portion of the buffer cylinder located inside the buffer box.

[0007] Furthermore, the oil holes are evenly distributed along the axial direction and circumferential direction of the buffer cylinder.

[0008] Furthermore, the filling height of the particles is higher than the height of the oil-through hole at the highest point.

[0009] Furthermore, the particle size of the particles is larger than the diameter of the oil-through hole.

[0010] Furthermore, two ends of the buffer return spring are respectively connected and fixed to the buffer rod and the buffer box.

[0011] Furthermore, a wear-resistant pad is provided between the buffer cylinder and the fixed cover.

[0012] Furthermore, the buffer box body is also provided with a filling port and a cover plate matching the filling port.

[0013] Furthermore, the bottom side of the buffer box is provided with feet.

[0014] Beneficial effects of the present invention.

[0015] The present invention can significantly reduce the impact on the inside of the buffer through the mixed impact between the hydraulic oil and the particles, and can further enhance the buffering effect and reduce the degree of damage to the buffer by combining the box-type structure and spring shock absorption, thereby increasing the service life of the entire equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the structure inside the buffer box of the present invention.

[0019] Figure 3 It is a schematic diagram of the side cross-section structure of the present invention after being filled with particles.

[0020] Markings in the figure: 1 is the buffer box, 2 is the buffer cylinder, 3 is the fixed cover, 4 is the buffer rod, 5 is the buffer return spring, 6 is the oil hole, 7 is the particle, 8 is the wear-resistant pad, 9 is the filling port, 10 is the cover plate, and 11 is the foot. DETAILED DESCRIPTION

[0021] As shown in the accompanying drawings, the present embodiment provides a granular buffer, including a buffer box body 1, a buffer cylinder 2 is connected to the buffer box body 1, the bottom end of the buffer cylinder 2 is connected to the bottom side of the buffer box body 1, the buffer cylinder 2 passes through the buffer box body 1 and is connected to a solid cover 3 at the top, so that a buffer cavity is formed inside the buffer cylinder 2, and a wear-resistant pad 8 is arranged between the buffer cylinder 2 and the solid cover 3 to reduce the wear on the buffer cylinder 2 and the solid cover 3.

[0022] A buffer rod 4 is movably arranged through the solid cover 3. The buffer rod 4 extends into the buffer tube 2. The buffer rod 4 can move up and down. A buffer return spring 5 is connected between the buffer rod 4 and the buffer box 1. Both ends of the buffer return spring 5 are respectively connected and fixed to the buffer rod 4 and the buffer box 1. When the buffer rod 4 moves downward due to an external impact force, the elastic potential energy of the compressed buffer return spring 5 will consume a part of the energy generated by the impact force on the buffer rod 4, thereby playing a buffering role.

[0023] The buffer box 1 and the buffer cylinder 2 are both filled with hydraulic oil (the hydraulic oil is not shown in the attached drawings). A plurality of oil holes 6 are provided on the side wall of the buffer cylinder 2 located inside the buffer box 1, so that the buffer cylinder 2 is connected with the inside of the buffer box 1. The oil holes 6 are evenly distributed along the axial and circumferential directions of the buffer cylinder 2, so that the hydraulic oil can pass through the oil holes 6 in a more balanced manner.

[0024] When the buffer rod 4 is subjected to external impact force, the oil pressure in the buffer chamber increases. When the hydraulic oil passes through the oil hole 6, the local resistance generated by the oil hole and the hydraulic oil will also consume part of the energy generated by the impact force on the buffer rod 4.

[0025] The buffer box 1 is filled with particles 7 outside the buffer cylinder 2. The particles 7 can be common objects such as sand and gravel, and the particles 7 are fully mixed with the hydraulic oil. When the buffer rod 4 moves to the bottom of the buffer box 1, the oil pressure in the buffer cavity increases, and the filling height of the particles 7 is higher than the height of the oil hole 6 located at the highest point. At the same time, the particle size of the particles 7 is larger than the diameter of the oil hole. After passing through the oil hole 6, the hydraulic oil can fully and fully impact the particles 7. In the particle system, the force between the particles 7 is transmitted by the force chain structure, and the force chain structure has a significant time effect in the process of force propagation, which can expand the instantaneous local impact force in space and prolong the time, thereby converting the local impact load into a uniformly distributed load and reducing the impact strength. At the same time, due to the energy dissipation caused by the inelastic collision and sliding friction between the particles 7 and the energy redistribution problem caused by the splashing of the particles 7, the impact strength is further weakened.

[0026] Through the working effects of the buffer return spring 5, the oil hole, and the particles 7, combined with the box-type overall structure, the impact force on the buffer as a whole can be greatly reduced, thereby greatly reducing the damage caused by the buffer to the equipment in which it is located.

[0027] In order to regularly replace the particulate matter 7 and the hydraulic oil, the buffer box is also provided with a filling port 9 and a cover plate 10 matching the filling port 9. And the bottom side of the buffer box body 1 is provided with a foot 11, so that the buffer is fixedly connected to the external device through the foot 11 and bolts.

[0028] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. A granular buffer, characterized in that: The invention comprises a buffer box (1), wherein a buffer cylinder (2) is connected to the buffer box (1), the bottom end of the buffer cylinder (2) is connected to the bottom side of the buffer box (1), the buffer cylinder (2) passes through the buffer box (1) and the top end is connected to a fixed cover (3), a buffer rod (4) is movably arranged through the fixed cover (3), the buffer rod (4) extends into the buffer cylinder (2), a buffer return spring (5) is connected between the buffer rod (4) and the buffer box (1), a plurality of oil holes (6) are arranged on the side wall of the buffer cylinder (2), the buffer box (1) is filled with granular matter (7) outside the buffer cylinder (2), and the buffer box (1) and the buffer cylinder (2) are both filled with hydraulic oil; The oil hole (6) is arranged on the portion of the buffer cylinder (2) located inside the buffer box (1); The oil holes (6) are evenly distributed along the axial direction and circumferential direction of the buffer cylinder (2); The filling height of the particles (7) is higher than the height of the oil passage hole (6) located at the highest point.

2. A granular buffer according to claim 1, characterized in that: The particle size of the particles (7) is larger than the diameter of the oil passage hole (6).

3. A granular buffer according to claim 1, characterized in that: Two ends of the buffer return spring (5) are respectively connected and fixed to the buffer rod (4) and the buffer box (1).

4. A granular buffer according to claim 1, characterized in that: A wear-resistant pad is provided between the buffer cylinder (2) and the fixed cover (3).

5. A granular buffer according to claim 1, characterized in that: The buffer box body (1) is also provided with a filling port (9) and a cover plate (10) matching the filling port (9).

6. A granular buffer according to claim 1, characterized in that: The bottom side of the buffer box (1) is provided with a foot (11).

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