Spring hydraulic buffer protection device

Abstract

The utility model relates to the technical field of buffering protection, and discloses a spring hydraulic buffering protection device which comprises a damping piston cylinder and a piston rod, the damping piston cylinder is matched with the piston rod, a collided head is installed at the top of the piston rod, an elastic buffering cap is installed at the top of the collided head, a thrust spring is sleeved outside the piston rod, and the elastic buffering cap is sleeved outside the piston rod. The two ends of the thrust spring are fixed to the top of the damping piston barrel and the bottom of the elastic buffer cap respectively, the elastic buffer cap is made of high-elasticity materials and can effectively absorb impact force, and the bottom of the piston rod penetrates into the damping piston barrel in a sealed mode. By utilizing the damping characteristic of liquid flow and the elastic deformation of the spring, double buffering on impact force is realized, the stability and durability of the device are obviously improved, the vibration frequency of equipment in high-speed operation is effectively reduced, and the service life of the equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to buffer protection technical field, concretely is a spring hydraulic buffer protection device, and the device can be widely used in all kinds of need buffer protection scene, such as shuttle vehicle, elevator etc. BACKGROUND

[0002] In the prior art, there are many deficiencies in the buffer protection of equipment collision impact. Taking a shuttle vehicle as an example, the shuttle vehicle is prone to mechanical damage, electrical failure and cargo overturning during operation due to collision impact.

[0003] Traditional buffer devices are often single-function, and the buffer effect is not ideal, which cannot meet the buffer requirements under complex working conditions. In the field of elevators, although there are spring buffers and hydraulic buffers, the buffer effect of the spring buffer is limited in high-speed elevators, and the structure of the hydraulic buffer is relatively complex, and the cost is high.

[0004] Therefore, a buffer protection device is needed that can utilize the damping characteristics of liquid flow and the elastic deformation of springs to convert kinetic energy into internal energy of liquid and elastic potential energy of springs. SUMMARY

[0005] The utility model discloses a spring hydraulic buffer protection device, solve the technical problem that traditional buffer device is single-function, effect is not good, reach through the advantage of spring and liquid force, realize efficient buffering and energy conversion, significantly improve the stability and reliability of the device.

[0006] To achieve the above object, the utility model provides the following technical scheme: a spring hydraulic buffer protection device, including damping piston cylinder, piston rod, the damping piston cylinder, piston rod is compatible, and the top of piston rod is installed with the head that is hit, and the top of head that is hit is installed with elastic buffer cap, the outside of piston rod is equipped with the thrust spring, and the both ends of thrust spring are fixed to the top of damping piston cylinder and the bottom of elastic buffer cap respectively, the elastic buffer cap is made of high elasticity material, can effectively absorb impact force, the bottom of piston rod is sealed and penetrates to the inside of damping piston cylinder;

[0007] The rod body wall of piston rod is equipped with annular groove body that cooperates with the inside of damping piston cylinder, and the annular groove body is equipped with radial through hole on circumference equidistant, and the aperture of radial through hole changes from big-small-big, forms gradient structure, effectively adjusts buffer pressure, and promotes buffer effect;

[0008] The bottom end wall of piston rod is equipped with piston structure, and the piston structure is tightly matched with the inner wall of damping piston cylinder.

[0009] Preferably, the piston structure specifically comprises a piston body, a liquid flow groove is formed on the piston body, a piston valve block and a bottom valve seat are formed, overflow holes are equidistantly formed on the top and bottom of the liquid flow groove, and guide columns A and B are uniformly formed, respectively.

[0010] Preferably, the guide column A is connected with the piston valve block, the guide column B is connected with the bottom valve seat, two protruding structures are integrally connected to the outer wall of the piston valve block, the protruding structures are tightly matched with the inner wall of the damping piston cylinder, a buffer cavity is formed between the two protruding structures, a buffer liquid is filled in the buffer cavity, the buffer liquid has good viscosity and fluidity, can quickly disperse impact force, reduce vibration transmission and prolong the service life of the device.

[0011] Preferably, a bottom valve plate is installed at the bottom of the inner wall of the damping piston cylinder, a reflux channel is equidistantly arranged on the bottom valve plate, a circulation loop channel is arranged at the bottom of the reflux channel, and the circulation loop channel extends to both sides of the bottom of the damping piston cylinder.

[0012] Preferably, a connecting arm is integrally connected to both sides of the bottom of the damping piston cylinder, the connecting arm is hollow and connected with the circulation loop channel, an oil cylinder is arranged at the outer end of the connecting arm, a core cavity is arranged at the connecting position of the connecting arm and the oil cylinder, and an adjusting valve structure is arranged in the core cavity.

[0013] Preferably, the adjusting valve structure specifically comprises an adjusting valve cavity arranged at the bottom of the outer end of the connecting arm, a compression adjusting rod is connected with the adjusting valve cavity through an oil seal, a compression adjusting cover is threadedly connected to the tail end of the compression adjusting rod, a valve core is sealingly arranged on the top of the compression adjusting rod, a sensor is arranged at the top end of the compression adjusting rod, the valve core is arranged in the core cavity arranged at the connecting position of the connecting arm and the oil cylinder, an adjusting spring is sleeved on the outer wall of the compression adjusting rod, one end of the adjusting spring is fixed to the oil seal, and the other end of the adjusting spring is fixed to the bottom of the valve core.

[0014] The utility model provides a spring hydraulic buffering protection device.

[0015] (1) the utility model discloses a damping characteristic and spring's elastic deformation are utilized to realize the double buffering of impact force, the stability and durability of device are improved significantly, the vibration frequency of equipment in high -speed operation is reduced effectively, and the service life of equipment is prolonged.

[0016] (2) the utility model discloses the clearance between valve core and core cavity is changed by fine adjustment valve core position, and the oil flow speed is accurately controlled, and the damping effect is further optimized, so that the device can keep the best buffering state under different working conditions, improves the equipment running stability, and reduces the maintenance cost.

[0017] (3), the utility model disc discloses a kind of damping piston structure, including piston barrel, piston rod, impact head, elastic buffer cap, thrust spring, annular groove body, radial through-hole, piston body, liquid flow groove, piston valve block, overflow hole, guide column A, guide column B, bottom valve seat, convex structure, bottom valve plate, backflow channel, circulation loop channel, connecting arm, oil cylinder, adjusting valve cavity, compression adjusting rod, oil seal, adjusting spring, compression adjusting cover and valve core, the utility model discloses the design of piston structure is optimized, the flowability and viscosity balance of buffer solution are enhanced, ensure that still can high-efficiency dispersion impact force under extreme working condition, further reduce vibration amplitude, improve the overall reliability and service life of device, the core cavity design of connecting arm and oil cylinder, ensure that adjusting valve structure works stably under high pressure environment, avoid oil leakage, enhance the sealing and pressure resistance of device, guarantee the stability of long-term operation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is overall perspective view of the utility model;

[0019] Figure 2 It is overall structure front view cross-sectional view schematic view of the utility model;

[0020] Figure 3 It is the utility model Figure 2 A enlarged structure schematic view;

[0021] Figure 4 It is the utility model Figure 2 B enlarged structure schematic view;

[0022] Figure 5 It is the utility model Figure 2 C enlarged structure schematic view.

[0023] In the drawing: damping piston barrel 21, piston rod 22, impact head 23, elastic buffer cap 24, thrust spring 25, annular groove body 31, radial through-hole 32, piston body 331, liquid flow groove 332, piston valve block 333, overflow hole 334, guide column A 335, guide column B 336, bottom valve seat 337, convex structure 338, bottom valve plate 34, backflow channel 35, circulation loop channel 36, connecting arm 37, oil cylinder 38, adjusting valve cavity 41, compression adjusting rod 42, oil seal 43, adjusting spring 44, compression adjusting cover 45 and valve core 46. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Examples of the described embodiments are shown in the accompanying drawings, wherein like or similar elements or components throughout the several views are designated with identical reference numerals throughout. The embodiments described below by reference to the drawings are exemplary and are intended to be illustrative of the present application, and are not to be construed as limiting the present application. Embodiments

[0026] Based on the problems of the single function and poor effect of the existing traditional buffer device, the preferred embodiment of the spring hydraulic buffer protection device provided by the utility model has Figures 1-5 As shown in the figure: a spring hydraulic buffer protection device, including damping piston cylinder 21, piston rod 22, damping piston cylinder 21, piston rod 22 is matched, the top of piston rod 22 is installed with a head 23, the top of the head 23 is installed with a elastic buffer cap 24, the outside of piston rod 22 is sleeved with a thrust spring 25, the two ends of thrust spring 25 are fixed on the top of damping piston cylinder 21 and the bottom of elastic buffer cap 24 respectively, elastic buffer cap 24 is made of high elasticity material, which can effectively absorb impact force, the bottom of piston rod 22 is sealed and penetrated into the inside of damping piston cylinder 21;

[0027] The wall of the rod body of piston rod 22 is provided with an annular groove body 31 matched with the inside of damping piston cylinder 21, and a plurality of radial through holes 32 are circumferentially and equidistantly arranged on the annular groove body 31, the diameters of the radial through holes 32 change from large to small to large, forming a gradient structure, which can effectively adjust the buffer pressure and improve the buffer effect;

[0028] The bottom end wall of piston rod 22 is provided with a piston structure, and the piston structure 33 is tightly matched with the inner wall of damping piston cylinder 21;

[0029] The piston structure specifically includes a piston body 331, a liquid flow groove 332 is formed on the piston body 331, and a piston valve block 333 and a bottom valve seat 337 are formed, a plurality of overflow holes 334 are circumferentially and equidistantly arranged on the top of liquid flow groove 332 and the bottom of liquid flow groove 332, and guide columns A 335 and guide columns B 336 are uniformly formed, respectively, the guide column A 335 is connected with the piston valve block 333, the guide column B 336 is connected with the bottom valve seat 337, the outer wall of the piston valve block 333 is integrally connected with two protruding structures 338, the protruding structures 338 are tightly matched with the inner wall of the damping piston cylinder 21, a buffer cavity is formed between the two protruding structures 338, the buffer cavity is filled with a buffer liquid, the buffer liquid has good viscosity and fluidity, can quickly disperse impact force, reduce vibration transmission, and prolong the service life of the device;

[0030] The bottom of the inner wall of damping piston cylinder 21 is provided with a bottom valve plate 34, a plurality of backflow channels 35 are circumferentially and equidistantly arranged on the bottom valve plate 34, and a circulation loop channel 36 is communicated at the bottom of the backflow channel 35, the circulation loop channel 36 extends to both sides of the bottom of damping piston cylinder 21.

[0031] The bottom of the damping piston cylinder 21 is integrally connected with a connecting arm 37, the connecting arm 37 is hollow, and is connected with the circulating loop channel 36, the outer end of the connecting arm 37 is provided with an oil cylinder 38 in communication, and a core cavity is arranged at the connecting position of the connecting arm 37 and the oil cylinder 38, and an adjusting valve structure is arranged in the core cavity, and the adjusting valve structure can adjust the flow and pressure of the buffer solution as needed, to ensure that the buffering effect is optimized. Embodiment

[0032] Please refer to Figures 1-5 , and on the basis of embodiment one, further obtained: the adjusting valve structure specifically includes an adjusting valve cavity 41 opened at the bottom of the outer end of the connecting arm 37, a compression adjusting rod 42 connected with an oil seal 43 in the cavity, a compression adjusting cover 45 threadedly connected to the tail end of the compression adjusting rod 42, a valve core 46 sealingly sleeved at the top of the compression adjusting rod 42, the valve core 46 can slide up and down on the compression adjusting rod 42, a sensor is arranged at the top end of the compression adjusting rod 42, if the valve core 46 is separated from the top end of the compression adjusting rod 42, the sensor triggers an alarm mechanism, the valve core 46 is arranged in the core cavity at the connecting position of the connecting arm 37 and the oil cylinder 38, and an adjusting spring 44 is sleeved on the outer wall of the compression adjusting rod 42, one end of the adjusting spring 44 is fixed on the oil seal 43, and the other end is fixed on the bottom of the valve core 46; by screwing the tightness of the compression adjusting cover 45, the distance between the top end of the compression adjusting rod 42 and the valve core 46 is changed, so that the displacement of the valve core 46 on the compression adjusting rod 42 is accurately adjusted according to the real-time change of the oil pressure, and the valve core 46 is prevented from being separated from the limiting position of the compression adjusting rod 42 when being impacted by the oil, to ensure stable work of the valve core 46;

[0033] When in use, when force is applied to the impact head 23 arranged on the piston rod 22, the piston rod 22 drives the piston body 331 to move downward, the oil enters the buffer cavity through the overflow hole 334, and the thrust spring 25 is compressed to provide a buffer resistance;

[0034] The specific flow process of the oil is as follows:

[0035] During the compression process, the air in the damping piston cylinder 21 is compressed, the air pressure is increased, part of the oil liquid is pushed into the circulating loop channel 36 through the backflow channel 35, and the oil liquid flows to the connecting arm 37 through the circulating loop channel 36 and collides with the valve core 46, so that the valve core 46 and the core cavity form a gap, facilitating the oil liquid to enter the oil cylinder 38. According to the pressure change, the adjusting spring 44 automatically extends to adjust the opening and closing degree between the valve core 46 and the core cavity, control the oil liquid flow and pressure, and realize accurate adjustment of the buffering effect; and the other part of the oil liquid flows into the liquid flow groove 332 through the overflow hole 334 at the bottom of the piston body 331 and then flows out from the overflow hole 334 at the top, and the compression resistance is generated in the process, which can disperse the impact force; then the oil liquid continues to flow into the space above the damping piston cylinder 21 from the radial through hole 32, forming a reverse pressure, further slowing down the descending speed of the piston body 331, ensuring that the entire buffering process is stable and efficient, effectively prolonging the service life of the equipment; when the compression stroke is close to the limit, the piston body 331 contacts the bottom valve plate 34 at the bottom of the damping piston cylinder 21, closing the backflow channel 35, at this time, a closed loop is formed, and finally the self-balancing adjustment of the buffering system is realized.

[0036] During the recovery stroke, the thrust spring 25 pushes the piston rod 22 to move upward, the piston body 331 is no longer in contact with the bottom valve plate 34 at the bottom of the damping piston cylinder 21, that is, the backflow channel 35 is in a closed state, part of the oil liquid flows back through the radial through hole 32, flows into the liquid flow groove 332 through the overflow hole 334 at the top and then flows out from the overflow hole 334 at the bottom to the space below the damping piston cylinder 21, and the spring force needs to overcome the frictional force between the piston body 331 and the cylinder cavity to generate a frictional damping force in this process. The resistance to oil liquid flow attenuates the tension; the oil liquid in the oil cylinder 38 gradually releases the compression energy during the recovery process, and the oil liquid extrudes the valve core 46, and according to the pressure change, the adjusting spring 44 is automatically compressed to adjust the opening and closing degree between the valve core 46 and the core cavity, control the oil liquid backflow speed, and flow into the space below the damping piston cylinder 21 through the circulating loop channel 36 and the backflow channel 35.

[0037] When the recovery stroke is close to the limit, the compression of the spring absorbs the vibration energy, ensuring stable operation of the equipment, and the spring hydraulic buffering protection device that completes the reset stroke is ready for the next working cycle.

[0038] Finally, it should be noted that: the above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A spring-hydraulic cushioning protection device comprising a damping piston cylinder (21), a piston rod (22), characterized in that: The damping piston cylinder (21) is matched with the piston rod (22), the top of the piston rod (22) is provided with an impact head (23), the top of the impact head (23) is provided with an elastic buffer cap (24), the outer part of the piston rod (22) is provided with a thrust spring (25), the two ends of the thrust spring (25) are fixed to the top of the damping piston cylinder (21) and the bottom of the elastic buffer cap (24) respectively, the elastic buffer cap (24) is made of high elasticity material and can effectively absorb impact force, the bottom of the piston rod (22) is sealed and penetrates into the inside of the damping piston cylinder (21); The rod body wall of the piston rod (22) is provided with an annular groove (31) matched with the inside of the damping piston cylinder (21), and the annular groove (31) is provided with radial through holes (32) at equal intervals in the circumference, the hole diameter of the radial through holes (32) changes from large-small-large, forming a gradient structure, which effectively adjusts the buffer pressure and improves the buffer effect; The bottom end wall of the piston rod (22) is provided with a piston structure, the piston structure (33) is tightly matched with the inner wall of the damping piston cylinder (21).

2. A spring hydraulic cushioning protection device according to claim 1, characterized in that: The piston structure specifically includes a piston body (331), a liquid flow groove (332) is formed in the piston body (331), and a piston valve block (333) and a bottom valve seat (337) are formed, overflow holes (334) are provided at equal intervals in the circumference at the top of the liquid flow groove (332) and at the bottom of the liquid flow groove (332), and guide columns A (335) and guide columns B (336) are uniformly formed, respectively.

3. A spring hydraulic cushioning protection device according to claim 2, characterized in that: The guide column A (335) is connected with the piston valve block (333), the guide column B (336) is connected with the bottom valve seat (337), the outer wall of the piston valve block (333) is integrally connected with two protruding structures (338), the protruding structures (338) are tightly matched with the inner wall of the damping piston cylinder (21), a buffer cavity is formed between the two protruding structures (338) and is sealed, a buffer liquid is filled in the buffer cavity, the buffer liquid has good viscosity and fluidity, can quickly disperse impact force, reduce vibration transmission, and prolong the service life of the device.

4. A spring hydraulic cushioning protection device according to claim 1, characterized in that: The inner wall bottom of the damping piston cylinder (21) is provided with a bottom valve plate (34), the bottom valve plate (34) is provided with a backflow channel (35) at equal intervals in the circumference, the bottom of the backflow channel (35) is communicated with a circulating loop channel (36), and the circulating loop channel (36) extends to the bottom of the damping piston cylinder (21).

5. A spring hydraulic cushioning protection device according to claim 1, characterized in that: The bottom of the damping piston cylinder (21) is integrally connected with a connecting arm (37), the connecting arm (37) is hollow and connected with the circulating loop channel (36), an oil cylinder (38) is arranged at the outer end of the connecting arm (37), a core cavity is arranged at the connection between the connecting arm (37) and the oil cylinder (38), and an adjusting valve structure is arranged in the core cavity.

6. A spring hydraulic cushioning protection device according to claim 5, characterized in that: The adjusting valve structure specifically comprises an adjusting valve cavity (41) opened at the bottom of the outer end of the connecting arm (37), an oil seal (43) is connected in the cavity, a compression adjusting rod (42) is connected through the oil seal (43), a compression adjusting cover (45) is threadedly connected to the end of the compression adjusting rod (42), a valve core (46) is sealingly sleeved at the top of the compression adjusting rod (42), a sensor is arranged at the top end of the compression adjusting rod (42), the valve core (46) is arranged in a core cavity arranged at the connecting position of the connecting arm (37) and the oil cylinder (38), an adjusting spring (44) is sleeved on the outer wall of the compression adjusting rod (42), one end of the adjusting spring (44) is fixed on the oil seal (43), and the other end is fixed on the bottom of the valve core (46).

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