Hydraulic oil cylinder with damping structure

Abstract

The invention relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder with a damping structure, which comprises a hydraulic oil cylinder, a piston rod is inserted into the hydraulic oil cylinder, the top of the piston rod is connected with a piston, the middle of the piston is hollow, multiple groups of first buffer springs are arranged around the bottom of the piston, and the bottoms of the first buffer springs are connected with buffer rings. The buffer ring is connected with a first connecting column in the middle of the first buffer spring; the hydraulic oil cylinder with the damping structure has the beneficial effects that when the hydraulic oil cylinder drives an object to contract through the lower lug ring at the bottom of the piston rod, hydraulic oil is injected into the oil inlet in the side of the bottom of the hydraulic oil cylinder, and the hydraulic oil enters the bottom of the piston at the moment; and a buffer ring connected with the bottom of a first buffer spring at the bottom of the piston is impacted, so that the first buffer spring drives the buffer ring to contract, and the impact force is buffered.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder with a built-in shock-absorbing structure. Background Art

[0002] A hydraulic cylinder is a device that converts hydraulic energy into mechanical energy. It is widely used in engineering machinery, industrial automation, and construction. The working principle of a hydraulic cylinder is based on Pascal's law, which states that when a liquid transmits pressure in a closed container, the pressure in all directions is equal. A hydraulic cylinder is mainly composed of a cylinder body, a piston, a piston rod, and a seal. When hydraulic oil enters the cylinder through a high-pressure oil pipe, the pressure of the oil acts on the piston, pushing it to move. The movement of the piston is transmitted through the piston rod, which in turn drives the load to do work.

[0003] However, in the prior art, when the piston of the hydraulic cylinder rises or falls to the two ends of the hydraulic cylinder, the piston will collide with the upper and lower ends of the hydraulic cylinder, thereby generating violent vibrations. The vibrations directly act on the piston, and the piston and the inner wall of the cylinder barrel are subjected to force, which will affect the sealing of the piston for a long time, thereby affecting the operation effect of the hydraulic cylinder and shortening the service life of the hydraulic cylinder. Summary of the invention

[0004] The purpose of the present invention is to provide a hydraulic cylinder with a built-in shock-absorbing structure to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hydraulic cylinder, a piston rod is inserted into the interior of the hydraulic cylinder, the top of the piston rod is connected to the piston, the middle of the piston is hollow, a plurality of groups of first buffer springs are arranged around the bottom of the piston, the bottom of the first buffer spring is connected to a buffer ring, and the buffer ring is connected to a first connecting column in the middle of the first buffer spring; and a plurality of groups of protrusions are arranged on the top of the piston, a telescopic groove is opened on the top of the protrusion, a plurality of groups of second buffer springs are arranged around the protrusion, the top of the second buffer spring is connected to an extrusion block, and a second connecting column is arranged in the middle of the bottom of the extrusion block.

[0006] Preferably, an upper earring is provided on the top of the hydraulic cylinder, which is fixed to the fuselage through a fixing hole, and a lower earring is provided at the bottom of the piston rod, which is connected to the lifting object through the fixing hole, so that it can drive the object to move in a straight line.

[0007] Preferably, a cylinder cover is inserted into the bottom of the hydraulic cylinder, and the cylinder cover seals the interior of the hydraulic cylinder. Oil inlets are provided at the upper and lower ends of the hydraulic cylinder, and hydraulic oil can enter the interior of the hydraulic cylinder through the oil inlet.

[0008] Preferably, a plurality of groups of support columns are arranged around the middle of the piston, the outer sides of the support columns are connected to buffer columns, buffer blocks are arranged in the buffer columns, and the buffer blocks can move up and down inside the second connecting column.

[0009] Preferably, the first connecting column connected to the top of the buffer ring extends into the middle of the piston through a through hole opened at the bottom of the piston, the top of the first connecting column is connected to a connecting spring, and the top of the connecting spring is connected to a buffer block arranged in the middle of the buffer column. The buffer ring can squeeze the first buffer spring, so that the first buffer spring drives the first connecting column to push the connecting spring, and the connecting spring pushes the buffer block, so that the buffer block moves upward.

[0010] Preferably, a first sealing ring is arranged around the outer side of the piston, and the first sealing ring can seal the upper and lower ends of the piston to prevent hydraulic oil from leaking from the upper and lower ends of the piston, resulting in insufficient pressure in the hydraulic cylinder and inability to extend and retract the piston rod up and down.

[0011] Preferably, the piston is provided with a through hole directly below the extrusion block, and the bottom of the second connecting column is inserted into the middle of the piston through the through hole at the top of the piston, and is connected to the buffer block in the middle of the buffer column through a connecting spring. The extrusion block can squeeze the second buffer spring and shrink into the telescopic groove, while driving the second connecting column to push the connecting spring, so that the buffer block connected to the bottom of the connecting spring can expand and contract downward in the middle of the buffer column.

[0012] Preferably, a second sealing ring is provided around the inner side and the outer side of the buffer ring, and the second sealing ring can seal from the top of the buffer ring to the bottom of the piston to prevent the hydraulic oil from entering the middle of the piston along the through hole at the bottom of the piston. A third sealing ring is provided around the bottom of the extrusion block, and the third sealing ring is tightly attached to the inner side of the telescopic groove. The third sealing ring can seal the through hole opened at the bottom of the telescopic groove to prevent the hydraulic oil from entering the middle of the piston along the through hole at the top of the piston.

[0013] Preferably, a first rubber pad is provided at the bottom of the buffer ring, and the first rubber pad can protect the buffer ring to prevent the buffer ring from colliding with the bottom of the hydraulic cylinder and causing deformation of the buffer ring. A second rubber pad is provided on the top of the extrusion block, and the second rubber pad can protect the extrusion block to prevent the extrusion block from colliding with the top of the hydraulic cylinder and causing wear and damage to the extrusion block.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention proposes a hydraulic cylinder with a built-in shock-absorbing structure. When the hydraulic cylinder drives an object to contract through the lower earring at the bottom of the piston rod, hydraulic oil is injected into the oil inlet on the side of the bottom of the hydraulic cylinder. At this time, the hydraulic oil enters the bottom of the piston and begins to impact the buffer ring connected to the bottom of the first buffer spring at the bottom of the piston, so that the first buffer spring drives the buffer ring to contract and buffers the impact force. At the same time, the buffer ring drives the first connecting column in the middle of the first buffer spring to move upward, so that the first connecting column pushes the connecting spring at the top of the first connecting column, so that the buffer block is extended and retracted upward in the middle of the buffer column. A plurality of groups of first rubber buffer rings are arranged around the inner side of the buffer column, and a plurality of groups of second rubber buffer rings are arranged around the outer side of the buffer block. When the buffer block is extended and retracted, it can drive the first connecting column in the middle of the first buffer spring to move upward, so that the first connecting column pushes the connecting spring at the top of the first connecting column, so that the buffer block is extended and retracted upward in the middle of the buffer column. A rubber buffer ring is squeezed and collided with the second rubber buffer ring to slow down the telescopic movement of the connecting spring and dissipate the vibration force generated by the impact; when the piston rises to the top of the hydraulic cylinder, the top inner wall of the hydraulic cylinder begins to squeeze the extrusion block, so that the second buffer spring at the bottom of the extrusion block drives the extrusion block to shrink into the telescopic groove, slowing down the collision force, and transmitting it to the connecting spring at the top of the buffer column through the second connecting column connected to the bottom of the extrusion block, so that the connecting spring pushes the buffer block to move downward in the middle of the buffer column, and dissipates the vibration force through the squeezing and collision of the first rubber buffer ring and the second rubber buffer ring, reducing the vibration force generated by the collision between the piston and the top end of the hydraulic cylinder directly acting on the piston, causing force to be generated on the inner wall of the cylinder barrel, affecting the air tightness of the piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the piston of the present invention;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the piston of the present invention;

[0020] Figure 5 for Figure 4 A schematic diagram of the structure enlargement in the middle;

[0021] Figure 6 for Figure 4 Enlarged schematic diagram of the structure at point B in the middle.

[0022] In the figure: hydraulic cylinder 1, upper earring 2, cylinder head 3, oil inlet 4, piston rod 5, lower earring 6, piston 7, first sealing ring 8, first buffer spring 9, buffer ring 10, first connecting column 11, second sealing ring 12, first rubber pad 13, protrusion 14, telescopic groove 15, second buffer spring 16, extrusion block 17, third sealing ring 18, second connecting column 19, second rubber pad 20, support column 21, buffer column 22, connecting spring 23, buffer block 24, first rubber buffer ring 25, second rubber buffer ring 26. DETAILED DESCRIPTION

[0023] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figures 1 to 6The present invention provides a technical solution: a hydraulic cylinder 1, wherein a piston rod 5 is inserted into the interior of the hydraulic cylinder 1, the top of the piston rod 5 is connected to a piston 7, the middle of the piston 7 is hollow, a plurality of groups of first buffer springs 9 are arranged around the bottom of the piston 7, a buffer ring 10 is connected to the bottom of the first buffer spring 9, and the buffer ring 10 is connected to a first connecting column 11 in the middle of the first buffer spring 9; and a plurality of groups of protrusions 14 are arranged on the top of the piston 7, a telescopic groove 15 is opened on the top of the protrusion 14, a plurality of groups of second buffer springs 16 are arranged around the protrusion 14, the top of the second buffer spring 16 is connected to an extrusion block 17, and a The second connecting column 19; an upper earring 2 is provided on the top of the hydraulic cylinder 1, and the upper earring 2 is fixed to the fuselage through a fixing hole, and a lower earring 6 is provided at the bottom of the piston rod 5, and the lower earring 6 is connected to the lifting object through the fixing hole, so that it can drive the object to move in a straight line; a cylinder head 3 is plugged into the bottom of the hydraulic cylinder 1, and the cylinder head 3 seals the interior of the hydraulic cylinder 1, and oil inlets 4 are provided at the upper and lower ends of the hydraulic cylinder 1, and the hydraulic oil can enter the interior of the hydraulic cylinder 1 through the oil inlet 4; a plurality of groups of support columns 21 are arranged around the middle of the piston 7, and the outer side of the support column 21 is connected to the buffer column 22, and a buffer block 24 is provided in the buffer column 22, The punch block 24 can move up and down inside the second connecting column 19; the first connecting column 11 connected to the top of the buffer ring 10 extends into the middle of the piston 7 through the through hole opened at the bottom of the piston 7, the top of the first connecting column 11 is connected to the connecting spring 23, and the top of the connecting spring 23 is connected to the buffer block 24 set in the middle of the buffer column 22, and the buffer ring 10 can squeeze the first buffer spring 9, so that the first buffer spring 9 drives the first connecting column 11 to push the connecting spring 23, so that the connecting spring 23 pushes the buffer block 24, so that the buffer block 24 moves upward; the first sealing ring 8 is arranged around the outer side of the piston 7, and the first sealing ring 8 can The upper and lower ends of the plug 7 are sealed to prevent the hydraulic oil from leaking from the upper and lower ends of the piston 7, resulting in insufficient pressure in the hydraulic cylinder 1, and the piston rod 5 cannot be extended and retracted up and down; the piston 7 is provided with a through hole just below the extrusion block 17, and the bottom of the second connecting column 19 is inserted in the middle of the piston 7 through the through hole at the top of the piston 7, and is connected to the buffer block 24 in the middle of the buffer column 22 through the connecting spring 23. The extrusion block 17 can squeeze the second buffer spring 16 and shrink it into the telescopic groove 15, and at the same time drive the second connecting column 19 to push the connecting spring 23, so that the buffer block 24 connected to the bottom of the connecting spring 23 is extended and retracted downward in the middle of the buffer column 22;A second sealing ring 12 is arranged around the inner and outer sides of the buffer ring 10. The second sealing ring 12 can seal the top of the buffer ring 10 to the bottom of the piston 7 to prevent the hydraulic oil from entering the middle of the piston 7 along the through hole at the bottom of the piston 7. A third sealing ring 18 is arranged around the bottom of the extrusion block 17. The third sealing ring 18 is tightly attached to the inner side of the telescopic groove 15. The third sealing ring 18 can seal the through hole at the bottom of the telescopic groove 15 to prevent the hydraulic oil from entering the middle of the piston 7 along the through hole at the top of the piston 7. A first rubber pad 13 is arranged at the bottom of the buffer ring 10. The first rubber pad 13 can protect the buffer ring 10 to prevent the buffer ring 10 from colliding with the bottom of the hydraulic cylinder 1 and causing the buffer ring 10 to deform. A second rubber pad 20 is arranged at the top of the extrusion block 17. The second rubber pad 20 can protect the extrusion block 17 to prevent the extrusion block 17 from colliding with the top of the hydraulic cylinder 1 and causing the extrusion block 17 to be worn and damaged. ;

[0025] In actual use, when the hydraulic cylinder 1 drives the object to contract through the lower earring 6 at the bottom of the piston rod 5, hydraulic oil is injected into the oil inlet 4 on the side of the bottom of the hydraulic cylinder 1. At this time, the hydraulic oil enters the bottom of the piston 7 and begins to impact the buffer ring 10 connected to the bottom of the first buffer spring 9 at the bottom of the piston 7, so that the first buffer spring 9 drives the buffer ring 10 to contract and buffer the impact force. At the same time, the buffer ring 10 drives the first connecting column 11 in the middle of the first buffer spring 9 to move upward, so that the first connecting column 11 pushes the connecting spring 23 at the top of the first connecting column 11. The buffer block 24 is extended and retracted upward in the middle of the buffer column 22. A plurality of first rubber buffer rings 25 are arranged around the inner side of the buffer column 22, and a plurality of second rubber buffer rings 26 are arranged around the outer side of the buffer block 24. When the buffer block 24 is extended and retracted, it can drive the first rubber buffer ring 25 and the second rubber buffer ring 26 to squeeze and collide, slow down the extension and retraction movement of the connecting spring 23, and dissipate the vibration force generated by the impact. When the piston 7 rises to the top of the hydraulic cylinder 1, the top inner wall of the hydraulic cylinder 1 starts to squeeze the extrusion block 17, so that the second rubber buffer ring 26 at the bottom of the extrusion block 17 is pressed. The second buffer spring 16 drives the extrusion block 17 to contract into the telescopic groove 15, slowing down the collision force, and transmitting it to the connecting spring 23 at the top of the buffer column 22 through the second connecting column 19 connected to the bottom of the extrusion block 17, so that the connecting spring 23 pushes the buffer block 24 to move downward in the middle of the buffer column 22, and the vibration force is dissipated through the extrusion and collision of the first rubber buffer ring 25 and the second rubber buffer ring 26, reducing the vibration force generated by the collision between the piston 7 and the top end of the hydraulic cylinder 1 directly acting on the piston 7, so that the force is generated on the inner wall of the cylinder, affecting the air tightness of the piston 7; when the piston 7 is activated, the piston 7 is directly pressed against the inner wall of the cylinder, and the air tightness of the piston 7 is affected. When the plug rod 5 drives the object downward to the inner wall end of the hydraulic cylinder 1 through the lower earring 6, the bottom of the hydraulic cylinder 1 begins to squeeze the buffer ring 10, so that the first buffer spring 9 drives the buffer ring 10 to contract and buffer the impact force. At the same time, the buffer ring 10 drives the first connecting column 11 in the middle of the first buffer spring 9 to move upward, so that the first connecting column 11 pushes the connecting spring 23 at the top of the first connecting column 11, so that the buffer block 24 expands and contracts upward in the middle of the buffer column 22, and the vibration force generated by the collision between the first rubber buffer ring 25 and the second rubber buffer ring 26 is dissipated.

[0026] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. A hydraulic cylinder with a built-in shock-absorbing structure, characterized in that: include: A hydraulic cylinder (1), wherein a piston rod (5) is inserted into the interior of the hydraulic cylinder (1), the top of the piston rod (5) is connected to a piston (7), the middle of the piston (7) is hollow, a plurality of groups of first buffer springs (9) are arranged around the bottom of the piston (7), the bottom of the first buffer spring (9) is connected to a buffer ring (10), and the buffer ring (10) is connected to a first connecting column (11) in the middle of the first buffer spring (9); and A plurality of groups of protrusions (14) are arranged on the top of the piston (7), a telescopic groove (15) is opened on the top of the protrusion (14), a plurality of groups of second buffer springs (16) are arranged around the protrusion (14), the top of the second buffer spring (16) is connected to the extrusion block (17), and a second connecting column (19) is arranged in the middle of the bottom of the extrusion block (17).

2. The hydraulic cylinder with a built-in shock-absorbing structure according to claim 1, characterized in that: The top of the hydraulic cylinder (1) is provided with an upper earring (2), which is fixed to the machine body through a fixing hole. The bottom of the piston rod (5) is provided with a lower earring (6), which is connected to the lifting object through the fixing hole so that it can drive the object to move in a straight line.

3. The hydraulic cylinder with a built-in shock-absorbing structure according to claim 2 is characterized in that: A cylinder cover (3) is inserted into the bottom of the hydraulic cylinder (1), and the cylinder cover (3) seals the interior of the hydraulic cylinder (1). Oil inlets (4) are provided at the upper and lower ends of the hydraulic cylinder (1), and hydraulic oil can enter the interior of the hydraulic cylinder (1) through the oil inlet (4).

4. The hydraulic cylinder with a built-in shock-absorbing structure according to claim 3 is characterized in that: A plurality of groups of support columns (21) are arranged around the middle of the piston (7), the outer sides of the support columns (21) are connected to buffer columns (22), a buffer block (24) is arranged in the buffer column (22), and the buffer block (24) can move up and down inside the second connecting column (19).

5. The hydraulic cylinder with a built-in shock-absorbing structure according to claim 4, characterized in that: The first connecting column (11) connected to the top of the buffer ring (10) extends into the middle of the piston (7) through a through hole opened at the bottom of the piston (7); the top of the first connecting column (11) is connected to a connecting spring (23); the top of the connecting spring (23) is connected to a buffer block (24) arranged in the middle of the buffer column (22); the buffer ring (10) can squeeze the first buffer spring (9), so that the first buffer spring (9) drives the first connecting column (11) to push the connecting spring (23), so that the connecting spring (23) pushes the buffer block (24), and the buffer block (24) moves upward.

6. The hydraulic cylinder with a built-in shock-absorbing structure according to claim 5, characterized in that: A first sealing ring (8) is arranged around the outer side of the piston (7). The first sealing ring (8) can seal the upper and lower ends of the piston (7) to prevent hydraulic oil from leaking from the upper and lower ends of the piston (7), resulting in insufficient pressure in the hydraulic cylinder (1) and the inability to extend and retract the piston rod (5) up and down.

7. The hydraulic cylinder with a built-in shock-absorbing structure according to claim 6, characterized in that: The piston (7) is provided with a through hole just below the extrusion block (17); the bottom of the second connecting column (19) is inserted into the middle of the piston (7) through the through hole at the top of the piston (7), and is connected to the buffer block (24) in the middle of the buffer column (22) through the connecting spring (23); the extrusion block (17) can squeeze the second buffer spring (16) and shrink into the telescopic groove (15), while driving the second connecting column (19) to push the connecting spring (23), so that the buffer block (24) connected to the bottom of the connecting spring (23) can be extended downward in the middle of the buffer column (22).

8. The hydraulic cylinder with a built-in shock-absorbing structure according to claim 7, characterized in that: A second sealing ring (12) is arranged around the inner side and the outer side of the buffer ring (10). The second sealing ring (12) can seal the area from the top of the buffer ring (10) to the bottom of the piston (7) to prevent hydraulic oil from entering the middle of the piston (7) along the through hole at the bottom of the piston (7). A third sealing ring (18) is arranged around the bottom of the extrusion block (17). The third sealing ring (18) is tightly attached to the inner side of the telescopic groove (15). The third sealing ring (18) can seal the through hole at the bottom of the telescopic groove (15) to prevent hydraulic oil from entering the middle of the piston (7) along the through hole at the top of the piston (7).

9. The hydraulic cylinder with a built-in shock-absorbing structure according to claim 8, characterized in that: A first rubber pad (13) is provided at the bottom of the buffer ring (10), and the first rubber pad (13) can protect the buffer ring (10) to prevent the buffer ring (10) from colliding with the bottom of the hydraulic cylinder (1) and causing deformation of the buffer ring (10). A second rubber pad (20) is provided at the top of the extrusion block (17), and the second rubber pad (20) can protect the extrusion block (17) to prevent the extrusion block (17) from colliding with the top of the hydraulic cylinder (1) and causing wear and damage to the extrusion block (17).

Images