Hydraulic oil cylinder with high buffering performance

Abstract

The invention discloses a hydraulic oil cylinder with high buffering performance, and relates to the technical field of hydraulic oil cylinders, the hydraulic oil cylinder comprises a reciprocating motion assembly, and the reciprocating motion assembly is used for driving a piston rod to do reciprocating rectilinear motion. During use, when a sealing piston is about to move to a stroke terminal, a buffer ring generates thrust on an annular plate, so that two nitrile rubber pads are sunken, meanwhile, a reset spring is extruded and contracted, and under the cooperation of the reset spring and the nitrile rubber pads, the sealing piston is preliminarily buffered, and in addition, a connecting rod pushes a buffer plate to move in an arc-shaped cover; the piston rod body is filled with hydraulic oil and gradually extrudes polyurethane foam, the polyurethane foam has good buffering performance, the filled hydraulic oil generates viscous resistance, the extruded hydraulic oil can enter the buffering cavity through the oil inlet cavity, secondary buffering is conducted on the sealing piston under the cooperation of the polyurethane foam and the filled hydraulic oil, the movement speed of the piston rod body is gradually reduced, and the sealing effect is improved. And stable speed reduction and stopping are realized.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder with high buffering performance. Background Art

[0002] A hydraulic cylinder is a mechanical device that uses the hydraulic principle to achieve linear motion. It converts hydraulic energy into mechanical energy through changes in liquid pressure, thereby driving the movement of vehicles, machines and other equipment. When a straight-cylinder hydraulic cylinder is used to achieve reciprocating motion, a reduction device can be eliminated, and there is no transmission gap, and the movement is smooth. Therefore, it is widely used in engineering machinery, mining machinery, construction machinery, agricultural machinery, and aerospace. In addition to being used individually, hydraulic cylinders can also be combined in two or more or combined with other mechanisms to complete special functions.

[0003] In the prior art, when the hydraulic cylinder is in use, when the hydraulic oil enters one chamber of the cylinder, it pushes the piston and the piston rod to move, thereby performing work externally; while the oil in the other chamber returns to the oil tank through the corresponding oil circuit. When the piston moves quickly to the end of the stroke, due to inertia, the piston cannot stop moving immediately, but will continue to move forward for a certain distance, which is easy to collide with the cylinder heads on both sides, affecting the stability and reliability of the piston rod. Long-term collisions are also easy to cause deformation and even cracks in structures such as the piston and cylinder head, thereby reducing the service life of the cylinder.

[0004] Therefore, we propose a hydraulic cylinder with high buffering performance to solve the problems raised in the above background technology. Summary of the invention

[0005] The purpose of the present invention is to provide a hydraulic cylinder with high buffering performance to solve the problem that during use of the hydraulic cylinder proposed in the above background technology, due to inertia, the piston is prone to collide with the cylinder head, affecting the stability and reliability of the piston rod, and is also prone to deformation and even cracks in structures such as the piston and cylinder head, thereby reducing the service life of the cylinder.

[0006] To achieve the above object, the present invention provides the following technical solution: a hydraulic cylinder with high buffering performance, comprising a reciprocating component, the reciprocating component is used to drive a piston rod to reciprocate linearly, a buffer component and a cleaning component are arranged inside the reciprocating component, the buffer component is used to buffer the piston, and the cleaning component is used to clean dust and impurities on the outer surface of the piston rod; The reciprocating assembly comprises a cylinder, a rear end cover is arranged on one side of the outer surface of the cylinder, and a front end cover is arranged on the other side of the outer surface of the cylinder; Two buffer assemblies are provided, and the two buffer assemblies each include a fixing ring, an outer surface of one side of the two fixing rings is provided with a mounting groove, an annular plate is movably embedded in the interior of the two mounting grooves, the outer surfaces and inner walls of the two annular plates are fixedly connected with nitrile rubber pads, four arc covers are fixedly installed on the inner walls of the two mounting grooves, polyurethane foam is provided inside the eight arc covers, a buffer plate is movably embedded in the interior of the eight arc covers, the outer surfaces of the eight buffer plates are fixedly connected with sealing rings, four connecting rods are fixedly installed on the outer surface of one side of the eight buffer plates, and four oil inlet chambers are provided on the inner walls of the two mounting grooves.

[0007] Preferably, the cleaning assembly includes a threaded stop block, a cleaning groove is provided on the inner wall of the threaded stop block near one side, a silicone scraper ring is fixedly connected to one side of the cleaning groove, an annular skeleton is fixedly installed inside the silicone scraper ring, an embedded groove is provided on the outer surface of the threaded stop block near one side, a micro motor is installed inside the embedded groove by screws, a driving gear is fixedly installed on the output end of the micro motor, a ring gear is meshedly connected on the outer surface of the driving gear, a fixing rod is fixedly installed on the inner wall of the ring gear, and a scraper is fixedly installed on one end of the fixing rod.

[0008] Preferably, a V-shaped plate is installed on the outer surface of the threaded stop block near the embedded groove through bolts, an annular groove is provided inside the threaded stop block, an annular hole is provided on the inner wall of the cleaning groove, sliding grooves are provided on both sides of the annular groove, the outer surface of the ring gear is movably embedded in the annular groove, and the outer surface of the fixing rod is movably embedded in the annular hole.

[0009] Preferably, an outer surface of one side of the scraper is in contact with the outer surface of the silicone scraper ring, and a plurality of sliding rods are fixedly installed on the outer surfaces of both sides of the ring gear, and a plurality of sliding rods distributed on each circumference form a group, and one end of the two groups of sliding rods are movably embedded in the inside of two sliding grooves, respectively, and an annular tube is fixedly installed on the other side of the cleaning groove, and a plurality of suction straws are fixedly connected to the outer surface of the annular tube, and a connecting tube is fixedly connected to the outer surface of the annular tube near the bottom surface, and one end of the connecting tube is fixedly penetrated to the bottom of the threaded stop block.

[0010] Preferably, four buffer cavities are provided inside the two fixing rings, the interiors of the eight oil inlet cavities are respectively connected with the interiors of the eight buffer cavities, a buffer groove is provided at the center of the outer surface of one side of the rear end cover and the center of the outer surface of one side of the front end cover, the outer surfaces of the two fixing rings are respectively movably embedded in the two buffer grooves, the two fixing rings are respectively installed in the two buffer grooves by bolts, and the outer surfaces of the two nitrile rubber pads are respectively fixedly installed on one side of the two installation grooves.

[0011] Preferably, the inner walls of the other two nitrile rubber pads are respectively fixedly installed on the other side of the two mounting grooves, four fixing plates are fixedly installed on the outer surface of one side of the two annular plates, and the outer surface of one side of the eight fixing plates are fixedly connected with a return spring, one end of the eight return springs are respectively fixedly installed on the outer surface of one side of the eight fixing plates, and four return springs distributed on each circumference of the eight return springs form a group.

[0012] Preferably, the other ends of the two groups of reset springs are respectively fixedly mounted on the inner walls of the two mounting grooves, the eight fixed plates are grouped as four fixed plates distributed circumferentially, the four nitrile rubber pads are grouped as two nitrile rubber pads vertically, the other side outer surfaces of the two groups of fixed plates are respectively in contact with the outer surfaces of the two groups of nitrile rubber pads, the outer surfaces of the eight sealing rings are respectively in contact with the inner walls of the eight arc-shaped covers, the multiple connecting rods are grouped as a group, and one ends of the two groups of connecting rods are respectively fixedly mounted on the outer surfaces of one side of the two annular plates.

[0013] Preferably, a sealing piston is movably embedded inside the cylinder, a piston rod body is arranged inside the sealing piston, buffer rings are installed on the outer surfaces of both sides of the sealing piston by bolts, sealing grooves are provided near the edges on the outer surfaces of one side of the rear end cover and one side of the front end cover, and sealing gaskets are fixedly connected to one side of the two sealing grooves.

[0014] Preferably, the outer surfaces on both sides of the cylinder are movably embedded in the two sealing grooves respectively, and the outer surfaces on both sides of the cylinder are respectively fitted with the outer surfaces of the two sealing gaskets. The rear end cover and the front end cover are connected by screws and bolts, and the front end cover and the rear end cover are both provided with connecting grooves, and the tops of the front end cover and the rear end cover are fixedly connected with oil pipes near the connecting grooves.

[0015] Preferably, a threaded groove is provided on the outer surface of the other side of the front end cover, a leak-proof groove is provided on one side inside the threaded groove, a sealing ring is arranged inside the leak-proof groove, the outer surface of the piston rod body contacts the inner wall of the sealing ring and the silicone scraper ring respectively, the outer surface of the threaded stop block is threadedly embedded in the threaded groove, the outer surface of the other side of the threaded stop block contacts the outer surface of one side of the sealing ring, and the outer surface of the piston rod body is movably embedded in one of the fixing rings and the threaded stop block.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. When the present invention is used, when the sealing piston is about to move to the end of the stroke, the buffer ring first generates a thrust on the annular plate, causing the two nitrile rubber pads to be concave, and at the same time the reset spring is squeezed and contracted. With the cooperation of the reset spring and the nitrile rubber pad, the sealing piston is initially buffered. In addition, the connecting rod pushes the buffer plate to move inside the arc cover and gradually squeezes the polyurethane foam. The polyurethane foam absorbs the hydraulic oil and is in an expanded state. The polyurethane foam has good buffering performance. When the polyurethane foam is squeezed, the hydraulic oil will flow in the pores, generate viscous resistance, consume energy, and also have a buffering effect. The squeezed hydraulic oil will enter the buffer cavity through the oil inlet cavity. With the cooperation of the polyurethane foam and the hydraulic oil filled inside, the sealing piston is buffered for the second time, so that the movement speed of the piston rod body is gradually reduced, and smooth deceleration and stopping are achieved. Under the action of the buffer component, a high buffering effect is achieved, damage is reduced, and the service life of the cylinder is increased.

[0017] 2. When the present invention is used, the hydraulic oil is transported to the oil pipe at the rear end cover through the hydraulic oil supply system, and is injected into the cylinder through the connecting groove, pushing the sealing piston to move right inside the cylinder, and further pushing the piston rod body to move right. When the hydraulic oil enters the cylinder through the oil pipe and the connecting groove at the front end cover, the sealing piston and the piston rod body are pushed to move to the left, and reciprocating linear motion is achieved through the reciprocating moving assembly. When the reciprocating moving assembly is damaged, the buffer assembly can be taken out and used for other reciprocating moving assemblies to improve utilization.

[0018] 3. When the present invention is used, when the piston rod body moves to the left, it passes through the silicone scraper ring to scrape off the dust and impurities adhered to the outer surface of the piston rod body, so as to prevent the dust and impurities from entering the sealing ring and affecting the sealing performance of the sealing ring. The micro motor is started to drive the driving gear and the ring gear to rotate, and the scraper is driven to rotate through the fixed rod to scrape off the dust and impurities gathered on the outer surface of the silicone scraper ring, and the silicone scraper ring is cleaned to facilitate the subsequent better cleaning of the piston rod body. Suction is generated by the dust suction device, so that the suction pipe sucks the dust and impurities scraped by the scraper into the annular tube, and then the dust and impurities are transported to the dust collector of the dust suction device through the connecting tube, so as to prevent the dust and impurities scraped by the scraper from sticking to the silicone scraper ring again and affecting the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front perspective view of a hydraulic cylinder with high buffering performance according to the present invention; Figure 2 It is a structural cross-sectional expanded stereoscopic diagram of a reciprocating moving component in a hydraulic cylinder with high buffering performance according to the present invention; Figure 3 This is a structural unfolded stereogram of a rear end cover of a hydraulic oil cylinder with high buffering performance according to the present invention; Figure 4It is a structural sectional and expanded stereoscopic diagram of a front end cover of a hydraulic oil cylinder with high buffering performance according to the present invention; Figure 5 It is a structural cross-sectional expanded stereoscopic diagram of a buffer assembly in a hydraulic oil cylinder with high buffer performance according to the present invention; Figure 6 It is a structural sectional and expanded stereoscopic diagram of a fixing ring in a hydraulic cylinder with high buffering performance according to the present invention; Figure 7 It is a structural sectional and expanded stereoscopic diagram of an arc cover in a hydraulic oil cylinder with high buffering performance according to the present invention; Figure 8 It is a structural sectional and expanded stereoscopic diagram of a cleaning component in a hydraulic cylinder with high buffering performance according to the present invention; Fig. 9 It is a structural sectional expanded stereoscopic diagram of a threaded stop block in a hydraulic cylinder with high buffering performance according to the present invention; Fig.10 It is a structural cross-sectional expanded stereoscopic diagram of an annular skeleton in a hydraulic oil cylinder with high buffering performance according to the present invention; Fig.11 This is a structural sectional and expanded stereoscopic diagram of a ring gear in a hydraulic cylinder with high buffering performance according to the present invention.

[0020] In the figure: 1. reciprocating moving assembly; 101. cylinder; 102. rear end cover; 103. front end cover; 104. oil pipe; 105. connecting groove; 106. piston rod body; 107. sealing piston; 108. buffer ring; 109. sealing ring; 110. sealing groove; 111. sealing gasket; 112. buffer groove; 113. leakproof groove; 114. thread groove; 2. cleaning assembly; 201. threaded block; 202. V-shaped plate; 203. embedded groove; 204. micro motor; 205. driving gear; 206. ring gear; 207. slide rod; 208. ring Tube; 209, suction tube; 210, connecting tube; 211, silicone scraper ring; 212, cleaning groove; 213, annular skeleton; 214, annular groove; 215, fixing rod; 216, scraper; 217, slide groove; 218, annular hole; 3, buffer assembly; 301, fixing ring; 302, annular plate; 303, nitrile rubber pad; 304, fixing plate; 305, mounting groove; 306, reset spring; 307, arc cover; 308, buffer plate; 309, connecting rod; 310, polyurethane foam; 311, buffer chamber; 312, oil inlet chamber; 313, sealing ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on 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.

[0022] Example 1: Please refer to Figure 1-Figure 11As shown, the present invention provides a technical solution: a hydraulic cylinder with high buffering performance, comprising a reciprocating component 1, the reciprocating component 1 is used to drive the piston rod to reciprocate and linearly move, a buffer component 3 and a cleaning component 2 are arranged inside the reciprocating component 1, the buffer component 3 is used to buffer the piston, and the cleaning component 2 is used to clean the dust and impurities on the outer surface of the piston rod; the reciprocating component 1 comprises a cylinder 101, a rear end cover 102 is arranged on the outer surface of one side of the cylinder 101, and a front end cover 103 is arranged on the outer surface of the other side of the cylinder 101; two buffer components 3 are arranged, and the two buffer components 3 both include a fixing ring 301, and the outer surface of one side of the two fixing rings 301 is provided with a mounting groove 305, and the inside of the two mounting grooves 305 is movably embedded with an annular The outer surfaces and inner walls of the two annular plates 302 are fixedly connected with nitrile rubber pads 303, the inner walls of the two mounting grooves 305 are fixedly installed with four arc covers 307, the interiors of the eight arc covers 307 are provided with polyurethane foam 310, the interiors of the eight arc covers 307 are movably embedded with buffer plates 308, the outer surfaces of the eight buffer plates 308 are fixedly connected with sealing rings 313, the outer surfaces of one side of the eight buffer plates 308 are fixedly installed with four connecting rods 309, the inner walls of the two mounting grooves 305 are provided with four oil inlet chambers 312, the interiors of the two fixing rings 301 are provided with four buffer chambers 311, the interiors of the eight oil inlet chambers 312 are respectively connected with the interiors of the eight buffer chambers 311, and the outer surface of one side of the rear end cover 102 is provided with a plurality of connecting rods 309, and the inner walls of the two mounting grooves 305 are provided with four oil inlet chambers 312, and the interiors of the two fixing rings 301 are provided with four buffer chambers 311. The interiors of the eight oil inlet chambers 312 are respectively connected with the interiors of the eight buffer chambers 311. A buffer groove 112 is provided at the center of the surface and at the center of the outer surface of one side of the front end cover 103. The outer surfaces of the two fixing rings 301 are movably embedded in the two buffer grooves 112 respectively. The two fixing rings 301 are respectively installed in the two buffer grooves 112 by bolts. The outer surfaces of the two nitrile rubber pads 303 are respectively fixedly installed on one side of the two mounting grooves 305, and the inner walls of the other two nitrile rubber pads 303 are respectively fixedly installed on the other side of the two mounting grooves 305. Four fixing plates 304 are fixedly installed on the outer surface of one side of the two annular plates 302. The outer surface of one side of the eight fixing plates 304 is fixedly connected with a return spring 306. One end of the eight return springs 306 is respectively fixedly installed on the eight fixing plates The outer surface of one side of 304, four return springs 306 distributed on each circumference of eight return springs 306 form a group, and the other ends of the two groups of return springs 306 are respectively fixedly installed on the inner walls of the two mounting grooves 305, the four fixed plates 304 distributed on each circumference of eight fixed plates 304 form a group, the four nitrile rubber pads 303 form a group of two nitrile rubber pads 303 vertically, the outer surfaces of the other sides of the two groups of fixed plates 304 are respectively in contact with the outer surfaces of the two groups of nitrile rubber pads 303, the outer surfaces of the eight sealing rings 313 are respectively in contact with the inner walls of the eight arc covers 307, the multiple connecting rods 309 distributed on each circumference of multiple connecting rods 309 form a group, and one ends of the two groups of connecting rods 309 are respectively fixedly installed on the outer surface of one side of the two annular plates 302,A sealing piston 107 is movably embedded in the cylinder 101, a piston rod body 106 is arranged inside the sealing piston 107, buffer rings 108 are installed on the outer surfaces of both sides of the sealing piston 107 by bolts, sealing grooves 110 are provided on the outer surfaces of one side of the rear end cover 102 and the outer surfaces of one side of the front end cover 103 near the edge, and a sealing gasket 111 is fixedly connected to one side of the two sealing grooves 110, and the outer surfaces of both sides of the cylinder 101 are movably embedded in the two sealing grooves 110 respectively, and the outer surfaces of both sides of the cylinder 101 are respectively fitted with the outer surfaces of the two sealing gaskets 111, the rear end cover 102 and the front end cover 103 are connected by screws and bolts, and the interiors of the front end cover 103 and the rear end cover 102 are both opened. A connecting groove 105 is provided, and the tops of the front cover 103 and the rear cover 102 are fixedly connected with an oil pipe 104 near the connecting groove 105. A threaded groove 114 is provided on the outer surface of the other side of the front cover 103, and a leak-proof groove 113 is provided on one side of the inside of the threaded groove 114. A sealing ring 109 is provided inside the leak-proof groove 113. The outer surface of the piston rod body 106 contacts the inner wall of the sealing ring 109 and the silicone scraper ring 211 respectively. The outer surface of the threaded stopper 201 is threadedly embedded in the inside of the threaded groove 114. The outer surface of the other side of the threaded stopper 201 contacts the outer surface of one side of the sealing ring 109. The outer surface of the piston rod body 106 is movably embedded in one of the fixing rings 301 and the inside of the threaded stopper 201.

[0023] In this embodiment, when in use, four oil inlet chambers 312 and four buffer chambers 311 are provided in the fixing ring 301. Figure 7As shown, there are two oil inlet chambers 312 and buffer chambers 311 on the left, and two oil inlet chambers 312 and buffer chambers 311 on the right. The oil inlet chambers 312 and buffer chambers 311 on the left and right sides are symmetrically distributed. One end of the two oil pipes 104 is connected to the external hydraulic oil supply system. The hydraulic oil is transported to the oil pipe 104 at the rear end cover 102 through the hydraulic oil supply system, and then the hydraulic oil is injected into the cylinder 101 through the corresponding connecting groove 105. As the amount of hydraulic oil injected increases, the sealing piston 107 will be pushed to move rightward inside the cylinder 101, and the piston rod body 106 will be further pushed to move rightward. When the sealing piston 107 is about to move to the front end cover 103, the buffer ring 108 on the right first contacts the annular plate 302, and with the continued movement of the sealing piston 107, the annular plate 302 is pushed to move into the mounting groove 305 through the buffer ring 108. The nitrile rubber pad 303 connected to the outer surface and the inner wall of the annular plate 302 has It has good elasticity. When the annular plate 302 is pushed to move toward the inside of the installation groove 305, it will pull the two nitrile rubber pads 303 to make them concave toward the inside of the installation groove 305. The deformation of the nitrile rubber pad 303 can absorb part of the impact energy. At the same time, the fixed plate 304 pushes the reset spring 306 to squeeze and shrink. With the cooperation of the reset spring 306 and the nitrile rubber pad 303, the buffer ring 108 and the sealing piston 107 are initially buffered. When the annular plate 302 moves, it pushes multiple connecting rods 309 to move, and further pushes the four buffer plates 308 to move toward the direction of the polyurethane foam 310 inside the corresponding arc cover 307, and gradually squeezes the polyurethane foam 310. The polyurethane foam 310 inside the arc cover 307 is in a state of expansion after absorbing hydraulic oil. The polyurethane foam 310 itself has good buffering performance. Its porous structure enables it to absorb energy through its own deformation when subjected to external force.After absorbing the hydraulic oil, the volume of the polyurethane foam 310 increases, and its compressible space and energy absorption capacity are increased. When squeezed by external force, there is more deformation space to consume energy. When the buffer plate 308 squeezes the polyurethane foam 310, the pore structure inside the polyurethane foam 310 will be compressed and deformed. In this process, the work done by the external force is converted into the elastic potential energy of the foam and the friction heat energy inside the material, thereby achieving a buffering effect. In addition, when the polyurethane foam 310 is squeezed, the hydraulic oil will flow in the pores. Since the hydraulic oil is viscous, viscous resistance will be generated during its flow. This part of resistance will consume energy and also have a buffering effect, while the squeezed hydraulic oil will It will enter the buffer chamber 311 through the oil inlet chamber 312, and with the cooperation of the polyurethane foam 310 and the hydraulic oil filled inside, the buffer ring 108 and the sealing piston 107 are buffered for the second time, so that the movement speed of the sealing piston 107 and the piston rod body 106 is gradually reduced, avoiding the sealing piston 107 from colliding violently with the front end cover 103, achieving smooth deceleration and stopping, and under the action of the buffer assembly 3, a high buffering effect is achieved. When the hydraulic oil enters the cylinder 101 through the oil pipe 104 and the connecting groove 105 at the front end cover 103 and pushes the sealing piston 107 and the piston rod body 106 to move to the left, the buffer ring 108 on the right side gradually separates from the annular plate 302, and the annular plate 302 loses the pushing force. The force, under the elasticity of the reset spring 306, pushes the annular plate 302 to reset, and pulls the connecting rod 309 and the buffer plate 308 to move and reset, the polyurethane foam 310 loses its extrusion and gradually recovers its expanded state. At the same time, the hydraulic oil in the buffer chamber 311 returns to the arc cover 307 through the oil inlet chamber 312 and is absorbed by the polyurethane foam 310 again. The buffer component 3 on the right returns to its initial state, which is convenient for buffering the sealing piston 107 and the front cover 103 next time. When the sealing piston 107 moves to the rear cover 102, the buffer component 3 on the left and the buffer ring 108 on the left are used to buffer the sealing piston 107 and the rear cover 102, and reciprocating linear motion is achieved through the reciprocating moving component 1. Through the two buffer components 3, a high buffering effect is achieved, the stability of the movement of the piston rod body 106 is improved, the collision between the sealing piston 107 and the front cover 103 and the rear cover 102 is reduced, damage is reduced, and the service life of the cylinder is increased. The problem that the piston is prone to collision with the cylinder cover due to inertia during the use of the hydraulic cylinder, affecting the stability and reliability of the piston rod, and easily causing deformation and even cracks in structures such as the piston and cylinder cover, thereby reducing the service life of the cylinder, is solved. The two buffer components 3 are respectively installed in the buffer groove 112 of the front cover 103 and the rear cover 102 by bolts. When the reciprocating moving component 1 is damaged, the buffer component 3 can be taken out and used for other reciprocating moving components 1 to improve the utilization rate.

[0024] Embodiment 2: Figure 1-Figure 4 and Figure 8-Figure 11As shown, the cleaning assembly 2 includes a threaded stopper 201, a cleaning groove 212 is provided near one side of the inner wall of the threaded stopper 201, a silicone scraper ring 211 is fixedly connected to one side of the cleaning groove 212, and a ring frame 213 is fixedly installed inside the silicone scraper ring 211, an embedded groove 203 is provided near one side of the outer surface of the threaded stopper 201, a micro motor 204 is installed inside the embedded groove 203 by screws, a driving gear 205 is fixedly installed at the output end of the micro motor 204, and the outer surface of the driving gear 205 is meshed with a ring gear 206, and the ring gear 206 is meshed with the outer surface of the ring gear 206. A fixing rod 215 is fixedly installed on the inner wall of 06, and a scraper 216 is fixedly installed on one end of the fixing rod 215. A V-shaped plate 202 is installed on the outer surface of the threaded block 201 near the embedded groove 203 through bolts. An annular groove 214 is opened inside the threaded block 201, and an annular hole 218 is opened on the inner wall of the cleaning groove 212. Slide grooves 217 are opened on both sides of the annular groove 214. The outer surface of the ring gear 206 is movably embedded in the annular groove 214, and the outer surface of the fixing rod 215 is movably embedded in the annular hole 218. The outer surface of one side of the scraper 216 is connected to the inner wall of the cleaning groove 212. The outer surfaces of the silicone scraper ring 211 are in contact with each other, and multiple sliding rods 207 are fixedly installed on the outer surfaces of both sides of the ring gear 206. The multiple sliding rods 207 distributed on each circumference form a group, and one end of the two groups of sliding rods 207 are movably embedded in the two slide grooves 217 respectively. An annular tube 208 is fixedly installed on the other side of the cleaning groove 212. Multiple suction pipes 209 are fixedly connected to the outer surface of the annular tube 208. A connecting tube 210 is fixedly connected to the outer surface of the annular tube 208 near the bottom surface. One end of the connecting tube 210 is fixedly penetrated to the bottom of the threaded stop block 201. A threaded groove 114 is provided on the outer surface of the other side of the front end cover 103, and a leak-proof groove 113 is provided on one side inside the threaded groove 114. A sealing ring 109 is arranged inside the leak-proof groove 113. The outer surface of the piston rod body 106 contacts the inner wall of the sealing ring 109 and the silicone scraper ring 211 respectively. The outer surface of the threaded stop block 201 is threadedly embedded in the threaded groove 114, and the outer surface of the other side of the threaded stop block 201 contacts the outer surface of one side of the sealing ring 109. The outer surface of the piston rod body 106 is movably embedded in one of the fixing rings 301 and the threaded stop block 201.

[0025] In this embodiment, when in use, the sealing ring 109 is used to improve the sealing performance between the piston rod body 106 and the front end cover 103 to prevent leakage of hydraulic oil. When the piston rod body 106 moves to the left, it passes through the silicone scraper ring 211 to scrape off the dust and impurities adhering to the outer surface of the piston rod body 106 and falls on the outer surface of the silicone scraper ring 211, thereby preventing the dust and impurities from entering the sealing ring 109 and the piston rod body 106 and affecting the sealing performance of the sealing ring 109. The micro motor 204 is started at a fixed time, and the driving gear 205 is driven to rotate by the rotation of the output end of the micro motor 204, and then the ring gear 206 is driven to rotate inside the annular groove 214, and the fixing rod 215 is driven to rotate in the annular hole 218, and further The scraper 216 is driven to rotate along the outer surface of the silicone scraper ring 211 to scrape off the dust and impurities gathered on the outer surface of the silicone scraper ring 211, clean the silicone scraper ring 211, improve the cleanliness of the silicone scraper ring 211, and facilitate the subsequent cleaning of the piston rod body 106. One end of the connecting tube 210 is connected to an external dust collection device through a connecting piece. When the micro motor 204 is started, suction is generated through the dust collection device, so that the multiple suction pipes 209 suck the dust and impurities scraped by the scraper 216 into the annular tube 208, and then the dust and impurities are transported to the dust collector of the dust collection device through the connecting tube 210 to prevent the dust and impurities scraped by the scraper 216 from sticking to the silicone scraper ring 211 again and affecting the cleaning effect.

[0026] The effect and working principle of the whole mechanism are as follows: the hydraulic oil is delivered to the oil pipe 104 at the rear end cover 102 through the hydraulic oil supply system, and then the hydraulic oil is injected into the cylinder 101 through the corresponding connecting groove 105. As the amount of hydraulic oil injected increases, the sealing piston 107 is pushed to move rightward inside the cylinder 101, and the piston rod body 106 is further pushed to move rightward. When the sealing piston 107 is about to move to the front end cover 103, the buffer ring 108 on the right side first contacts the annular plate 302, and with the continued movement of the sealing piston 107, the annular plate 302 is pushed to move into the mounting groove 305 through the buffer ring 108. The nitrile rubber pad 303 connected to the outer surface and the inner wall of the annular plate 302 has good elasticity. When 302 is pushed to move into the installation groove 305, it will pull the two nitrile rubber pads 303 to make them concave into the installation groove 305. The deformation of the nitrile rubber pad 303 can absorb part of the impact energy. At the same time, the fixed plate 304 pushes the reset spring 306 to squeeze and contract. With the cooperation of the reset spring 306 and the nitrile rubber pad 303, the buffer ring 108 and the sealing piston 107 are initially buffered. When the annular plate 302 moves, it pushes multiple connecting rods 309 to move, and further pushes the four buffer plates 308 to move in the direction of the polyurethane foam 310 inside the corresponding arc cover 307, and gradually squeezes the polyurethane foam 310. The polyurethane foam 310 inside the arc cover 307 is in a state of expansion after absorbing the hydraulic oil. When When the buffer plate 308 squeezes the polyurethane foam 310, the pore structure inside the polyurethane foam 310 will be compressed and deformed to achieve a buffering effect. In addition, when the polyurethane foam 310 is squeezed, the hydraulic oil will flow in the pores. Since the hydraulic oil is viscous, viscous resistance will be generated during its flow. This part of resistance will consume energy and also have a buffering effect. The squeezed hydraulic oil will enter the buffer cavity 311 through the oil inlet cavity 312. With the cooperation of the polyurethane foam 310 and the hydraulic oil filled inside, the buffer ring 108 and the sealing piston 107 are buffered for the second time, so that the movement speed of the sealing piston 107 and the piston rod body 106 is gradually reduced, avoiding a violent collision between the sealing piston 107 and the front end cover 103, and achieving Smooth deceleration and stopping. Under the action of the buffer component 3, a high buffering effect is achieved. When the hydraulic oil enters the cylinder 101 through the oil pipe 104 and the connecting groove 105 at the front end cover 103 and pushes the sealing piston 107 and the piston rod body 106 to move to the left, the buffer ring 108 on the right side gradually separates from the annular plate 302, and the annular plate 302 loses thrust. Under the elasticity of the reset spring 306, the annular plate 302 is pushed to reset, and the connecting rod 309 and the buffer plate 308 are pulled to move and reset. The polyurethane foam 310 loses extrusion and gradually returns to the expanded state. At the same time, the hydraulic oil in the buffer chamber 311 returns to the arc cover 307 through the oil inlet chamber 312 and is absorbed by the polyurethane foam 310 again. The buffer component 3 on the right side returns to its initial state.It is convenient to buffer the sealing piston 107 and the front end cover 103 next time. When the sealing piston 107 moves to the rear end cover 102, the sealing piston 107 and the rear end cover 102 are buffered by the buffer component 3 on the left and the buffer ring 108 on the left. The reciprocating linear motion is realized by the reciprocating component 1. The high buffering effect is achieved by the two buffer components 3. When the piston rod body 106 moves to the left, the dust and impurities adhered to the outer surface of the piston rod body 106 are scraped off through the silicone scraper ring 211 and fall on the outer surface of the silicone scraper ring 211 to prevent dust and impurities from entering the sealing ring 109 and the piston rod body 106 and affecting the sealing performance of the sealing ring 109. The micro motor 204 is started at a fixed time, and the rotation of the output end of the micro motor 204 drives the main The moving gear 205 rotates, and then drives the ring gear 206 to rotate inside the ring groove 214, and drives the fixed rod 215 to rotate in the ring hole 218, and further drives the scraper 216 to rotate along the outer surface of the silicone scraper ring 211, scraping off the dust and impurities gathered on the outer surface of the silicone scraper ring 211, cleaning the silicone scraper ring 211, improving the cleanliness of the silicone scraper ring 211, and facilitating the subsequent cleaning of the piston rod body 106. One end of the connecting pipe 210 is connected to the external dust collection device through a connecting piece. When the micro motor 204 is started, suction is generated through the dust collection device, so that the multiple suction pipes 209 suck the dust and impurities scraped off by the scraper 216 into the ring pipe 208, and then transport the dust and impurities to the dust collector of the dust collection device through the connecting pipe 210.

[0027] Among them, the micro motor 204 is a prior art, and its components and operating principles are public technologies, which will not be explained in detail here.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic cylinder with high buffering performance, comprising a reciprocating component (1), the reciprocating component (1) being used to drive a piston rod to reciprocate linearly, characterized in that: A buffer component (3) and a cleaning component (2) are arranged inside the reciprocating component (1), wherein the buffer component (3) is used to buffer the piston, and the cleaning component (2) is used to clean dust and impurities on the outer surface of the piston rod; The reciprocating assembly (1) comprises a cylinder (101), a rear end cover (102) being provided on one side of the outer surface of the cylinder (101), and a front end cover (103) being provided on the other side of the outer surface of the cylinder (101); Two buffer assemblies (3) are provided, and the two buffer assemblies (3) each comprise a fixing ring (301), one side outer surface of each of the two fixing rings (301) is provided with a mounting groove (305), an annular plate (302) is movably embedded inside each of the two mounting grooves (305), the outer surfaces and inner walls of each of the two annular plates (302) are fixedly connected with nitrile rubber pads (303), four arc-shaped covers (307) are fixedly installed on the inner walls of each of the two mounting grooves (305), polyurethane foam (310) is provided inside each of the eight arc-shaped covers (307), a buffer plate (308) is movably embedded inside each of the eight arc-shaped covers (307), the outer surfaces of each of the eight buffer plates (308) are fixedly connected with a sealing ring (313), four connecting rods (309) are fixedly installed on one side outer surface of each of the eight buffer plates (308), and four oil inlet chambers (312) are provided on the inner walls of each of the two mounting grooves (305).

2. The hydraulic cylinder with high buffering performance according to claim 1, characterized in that: The cleaning assembly (2) comprises a threaded stopper (201), a cleaning groove (212) is provided on an inner wall of the threaded stopper (201) near one side, a silicone scraper ring (211) is fixedly connected to one side of the cleaning groove (212), an annular frame (213) is fixedly installed inside the silicone scraper ring (211), an inner groove (203) is provided on an outer surface of the threaded stopper (201) near one side, a micro motor (204) is installed inside the inner groove (203) by means of screws, a driving gear (205) is fixedly installed on the output end of the micro motor (204), a ring gear (206) is meshedly connected to the outer surface of the driving gear (205), a fixing rod (215) is fixedly installed on the inner wall of the ring gear (206), and a scraper (216) is fixedly installed on one end of the fixing rod (215).

3. The hydraulic cylinder with high buffering performance according to claim 2, characterized in that: A V-shaped plate (202) is installed on the outer surface of the threaded stopper (201) near the embedded groove (203) by means of bolts, an annular groove (214) is provided inside the threaded stopper (201), an annular hole (218) is provided on the inner wall of the cleaning groove (212), sliding grooves (217) are provided on both sides of the annular groove (214), the outer surface of the annular gear (206) is movably embedded in the annular groove (214), and the outer surface of the fixing rod (215) is movably embedded in the annular hole (218).

4. The hydraulic cylinder with high buffering performance according to claim 3, characterized in that: One side outer surface of the scraper (216) contacts the outer surface of the silicone scraper ring (211), and multiple sliding rods (207) are fixedly installed on the outer surfaces of both sides of the ring gear (206). Multiple sliding rods (207) distributed on each circumference form a group, and one end of the two groups of sliding rods (207) are movably embedded in the inside of two sliding grooves (217), and an annular tube (208) is fixedly installed on the other side of the cleaning groove (212). Multiple suction pipes (209) are fixedly connected to the outer surface of the annular tube (208), and a connecting tube (210) is fixedly connected to the outer surface of the annular tube (208) near the bottom surface, and one end of the connecting tube (210) is fixedly penetrated to the bottom of the threaded stop block (201).

5. The hydraulic cylinder with high buffering performance according to claim 1, characterized in that: Four buffer chambers (311) are respectively provided inside the two fixing rings (301), the interiors of the eight oil inlet chambers (312) are respectively communicated with the interiors of the eight buffer chambers (311), a buffer groove (112) is respectively provided at the center of the outer surface of one side of the rear end cover (102) and the center of the outer surface of one side of the front end cover (103), the outer surfaces of the two fixing rings (301) are respectively movably embedded in the insides of the two buffer grooves (112), the two fixing rings (301) are respectively installed in the insides of the two buffer grooves (112) by bolts, and the outer surfaces of the two nitrile rubber pads (303) are respectively fixedly installed on one side of the insides of the two installation grooves (305).

6. The hydraulic cylinder with high buffering performance according to claim 5, characterized in that: The inner walls of the other two nitrile rubber pads (303) are respectively fixedly mounted on the other side of the two mounting grooves (305); four fixing plates (304) are fixedly mounted on the outer surfaces of one side of the two annular plates (302); the outer surfaces of one side of the eight fixing plates (304) are fixedly connected with return springs (306); one end of the eight return springs (306) is respectively fixedly mounted on the outer surfaces of one side of the eight fixing plates (304); and four return springs (306) distributed on each circumference of the eight return springs (306) form a group.

7. The hydraulic cylinder with high buffering performance according to claim 6, characterized in that: The other ends of the two groups of return springs (306) are respectively fixedly mounted on the inner walls of the two mounting grooves (305); the eight fixing plates (304) are each group of four fixing plates (304) distributed circumferentially; the four nitrile rubber pads (303) are each group of two nitrile rubber pads (303) vertically; the other side outer surfaces of the two groups of fixing plates (304) are respectively in contact with the outer surfaces of the two groups of nitrile rubber pads (303); the outer surfaces of the eight sealing rings (313) are respectively in contact with the inner walls of the eight arc-shaped covers (307); the multiple connecting rods (309) are each group of multiple connecting rods (309) distributed circumferentially; and one ends of the two groups of connecting rods (309) are respectively fixedly mounted on the outer surfaces of one side of the two annular plates (302).

8. The hydraulic cylinder with high buffering performance according to claim 4, characterized in that: A sealing piston (107) is movably embedded inside the cylinder (101), a piston rod body (106) is arranged inside the sealing piston (107), buffer rings (108) are installed on both sides of the outer surface of the sealing piston (107) by bolts, and sealing grooves (110) are provided near the edges on one side of the outer surface of the rear end cover (102) and one side of the outer surface of the front end cover (103), and sealing gaskets (111) are fixedly connected to one side of the inside of the two sealing grooves (110).

9. The hydraulic cylinder with high buffering performance according to claim 8, characterized in that: The outer surfaces of both sides of the cylinder barrel (101) are movably embedded in the two sealing grooves (110), and the outer surfaces of both sides of the cylinder barrel (101) are respectively fitted with the outer surfaces of the two sealing gaskets (111). The rear end cover (102) and the front end cover (103) are connected by screws and bolts. The front end cover (103) and the rear end cover (102) are both provided with connecting grooves (105). The tops of the front end cover (103) and the rear end cover (102) are fixedly connected with oil pipes (104) near the connecting grooves (105).

10. The hydraulic cylinder with high buffering performance according to claim 9, characterized in that: A threaded groove (114) is provided on the outer surface of the other side of the front end cover (103), a leak-proof groove (113) is provided on one side inside the threaded groove (114), a sealing ring (109) is arranged inside the leak-proof groove (113), the outer surface of the piston rod body (106) is in contact with the inner walls of the sealing ring (109) and the silicone scraper ring (211) respectively, the outer surface of the threaded stop block (201) is threadedly embedded in the threaded groove (114), the outer surface of the other side of the threaded stop block (201) is in contact with the outer surface of one side of the sealing ring (109), and the outer surface of the piston rod body (106) is movably embedded in one of the fixing rings (301) and the threaded stop block (201).

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