A hydraulic cylinder with high buffer performance

Abstract

The present invention discloses a hydraulic cylinder with high buffering performance, which relates to the technical field of hydraulic cylinders and includes a reciprocating moving component, wherein the reciprocating moving component is used to drive the piston rod to move back and forth linearly. When the present invention is used, when the sealing piston is about to move to the end of the stroke, the buffer ring generates a thrust on the annular plate, causing the two nitrile rubber pads to be concave, and at the same time the return spring is squeezed and contracted. With the cooperation of the return 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 has good buffering performance. The filled hydraulic oil generates viscous resistance. The squeezed hydraulic oil will enter the buffer chamber through the oil inlet chamber. With the cooperation of the polyurethane foam and the filled hydraulic oil, 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.

Description

Technical Field

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

[0002] A hydraulic cylinder is a mechanical device that uses hydraulic principles to achieve linear motion. It converts hydraulic energy into mechanical energy through changes in fluid pressure, thereby propelling vehicles, machinery, and other equipment. Using a straight-line hydraulic cylinder to achieve reciprocating motion eliminates the need for a reduction gear, eliminates transmission backlash, and provides smooth motion. Therefore, it is widely used in engineering machinery, mining machinery, construction machinery, agricultural machinery, and aerospace. Hydraulic cylinders can be used individually or in combination with two or more, or in combination with other mechanisms, to accomplish specialized 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 external work; while the oil in the other chamber returns to the oil tank through the corresponding oil circuit. When the piston moves rapidly to the end of the stroke, due to inertia, the piston cannot stop moving immediately, but will continue to move forward for a 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 or 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 proposed in the above background technology that during use of the hydraulic cylinder, 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 objectives, the present invention provides the following technical solution: a hydraulic cylinder with high buffering performance, comprising a reciprocating assembly for driving a piston rod to move back and forth linearly, a buffer assembly and a cleaning assembly disposed within the reciprocating assembly, the buffer assembly for cushioning the piston, and the cleaning assembly for cleaning dust and impurities from the outer surface of the piston rod;

[0007] The reciprocating assembly includes a cylinder, a rear end cover is provided on one side of the outer surface of the cylinder, and a front end cover is provided on the other side of the outer surface of the cylinder;

[0008] 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-shaped covers are fixedly installed on the inner walls of the two mounting grooves, polyurethane foam is provided inside the eight arc-shaped covers, a buffer plate is movably embedded in the interior of the eight arc-shaped 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.

[0009] Preferably, the cleaning assembly includes a threaded block, a cleaning groove is provided on the inner wall of the threaded block near one side, a silicone scraper ring is fixedly connected to one side of the inside 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 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, the outer surface of the driving gear is meshed with a ring 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.

[0010] Preferably, a V-shaped plate is installed on the outer surface of the threaded block near the embedded groove through bolts, an annular groove is provided inside the threaded 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.

[0011] Preferably, the outer surface of one side of the scraper contacts the outer surface of the silicone scraper ring, and multiple sliding rods are fixedly installed on the outer surfaces of both sides of the ring gear, and multiple 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 the two slide grooves, and an annular tube is fixedly installed on the other side of the cleaning groove, and multiple straws are fixedly connected to the outer surface of the annular tube. 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 passed through the bottom of the threaded block.

[0012] Preferably, four buffer cavities are provided inside the two fixing rings, the interiors of the eight oil inlet cavities are respectively connected to 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 movably embedded in the interiors of the two buffer grooves, and the two fixing rings are respectively installed in the interiors of the two buffer grooves by bolts, wherein the outer surfaces of the two nitrile rubber pads are respectively fixedly installed on one side of the interiors of the two installation grooves.

[0013] 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 fixed 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 fixed plates are fixedly connected to a reset spring, one end of the eight reset springs is respectively fixedly installed on the outer surface of one side of the eight fixed plates, and the four reset springs distributed on each circumference of the eight reset springs form a group.

[0014] 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 distributed circumferentially in a group of four fixed plates, the four nitrile rubber pads are divided into a group of two nitrile rubber pads vertically, the outer surfaces of the other sides 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 distributed circumferentially in 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.

[0015] Preferably, a sealing piston is movably embedded in the interior of 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, and sealing grooves are provided near the edges on the outer surface of one side of the rear end cover and the outer surface of one side of the front end cover, and a sealing gasket is fixedly connected to one side of the inside of the two sealing grooves.

[0016] Preferably, the outer surfaces of both sides of the cylinder are movably embedded in the inside of two sealing grooves, and the outer surfaces of both sides of the cylinder are respectively fitted with the outer surfaces of two sealing gaskets. The rear end cover and the front end cover are connected by screws and bolts. 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.

[0017] 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 provided 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 block is threadedly embedded in the inside of the threaded groove, the outer surface of the other side of the threaded 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 block.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 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 return spring is squeezed and contracted. With the cooperation of the return 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.

[0020] 2. When the present invention is in use, the hydraulic oil is delivered 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 the right inside the cylinder, and further pushing the piston rod body to the right. When the hydraulic oil enters the cylinder through the oil pipe and the connecting groove at the front end cover, it pushes the sealing piston and the piston rod body 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.

[0021] 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 stuck on the outer surface of the piston rod body, preventing the dust and impurities from entering the sealing ring and affecting the sealing performance of the sealing ring. The micro motor starts to drive the driving gear and the ring gear to rotate, and drives the scraper to rotate through the fixed rod to scrape off the dust and impurities gathered on the outer surface of the silicone scraper ring, and clean the silicone scraper ring to facilitate the subsequent better cleaning of the piston rod body. The dust suction device generates suction force, so that the suction pipe sucks the dust and impurities scraped by the scraper into the annular tube, and then transports the dust and impurities 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

[0022] Figure 1 This is a front perspective view of a hydraulic cylinder with high buffering performance according to the present invention;

[0023] Figure 2 This is a cross-sectional expanded perspective view of the structure of a reciprocating moving component in a hydraulic cylinder with high buffering performance according to the present invention;

[0024] Figure 3 This is a perspective view of the structure of a rear end cover of a hydraulic oil cylinder with high buffering performance according to the present invention;

[0025] Figure 4 This is a cross-sectional and expanded perspective view of the structure of a front end cover of a hydraulic oil cylinder with high buffering performance according to the present invention;

[0026] Figure 5 This is a cross-sectional and expanded perspective view of the structure of a buffer assembly in a hydraulic cylinder with high buffering performance according to the present invention;

[0027] Figure 6 This is a cross-sectional and expanded perspective view of the structure of a fixing ring in a hydraulic cylinder with high buffering performance according to the present invention;

[0028] Figure 7 This is a cross-sectional and expanded perspective view of the structure of an arc-shaped cover in a hydraulic oil cylinder with high buffering performance according to the present invention;

[0029] Figure 8 This is a cross-sectional and expanded perspective view of the structure of a cleaning assembly in a hydraulic cylinder with high buffering performance according to the present invention;

[0030] Figure 9 This is a cross-sectional and expanded perspective view of the structure of a threaded stop in a hydraulic cylinder with high buffering performance according to the present invention;

[0031] Figure 10 This is a cross-sectional and expanded perspective view of the structure of an annular skeleton in a hydraulic oil cylinder with high buffering performance according to the present invention;

[0032] Figure 11 This is a structural sectional and expanded stereoscopic diagram of a ring gear in a hydraulic oil cylinder with high buffering performance according to the present invention.

[0033] In the figure: 1. Reciprocating 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. Leak-proof groove; 114. Threaded groove; 2. Cleaning assembly; 201. Threaded block; 202. V-shaped plate; 203. Embedded groove; 204. Micro motor; 205. Driving gear; 206. Ring gear; 207. Sliding 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, return 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

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] Example 1: Please refer to Figures 1-11As shown, the present invention provides a technical solution: a hydraulic cylinder with high buffering performance, including a reciprocating component 1, the reciprocating component 1 is used to drive the piston rod to move back and forth linearly, 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 dust and impurities on the outer surface of the piston rod; the reciprocating component 1 includes 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 provided, 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 interior of the two mounting grooves 305 is movably embedded with an annular Plate 302, the outer surface and inner wall 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, and 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, and the interiors of the eight oil inlet chambers 312 are respectively connected to 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. A buffer groove 112 is provided at the center of the surface 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 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, wherein 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, and the outer surface of one side of the eight fixing plates 304 are fixedly connected to the return springs 306, and one end of the eight return springs 306 are respectively fixedly installed on the eight fixing plates On 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 mounted on the inner walls of the two mounting grooves 305, and four fixed plates 304 distributed on each circumference of eight fixing plates 304 form a group, and two nitrile rubber pads 303 are grouped vertically on each of the four nitrile rubber pads 303, and the outer surfaces of the other sides 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, and the outer surfaces of the eight sealing rings 313 are respectively in contact with the inner walls of the eight arc-shaped covers 307, and multiple connecting rods 309 distributed on each circumference of multiple connecting rods 309 form a group, and one end of the two groups of connecting rods 309 are respectively fixedly mounted on the outer surface of one side of the two annular plates 302.A sealing piston 107 is movably embedded in the interior of the cylinder 101, and 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. A sealing groove 110 is provided on the outer surface of one side of the rear end cover 102 and the outer surface of one side of the front end cover 103 near the edge. A sealing gasket 111 is fixedly connected to one side of the two sealing grooves 110. 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. The interiors of the front end cover 103 and the rear end cover 102 are both open. A connecting groove 105 is provided. The top of the front cover 103 and the rear cover 102 are fixedly connected to the 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. A leak-proof groove 113 is provided on one side of the inner surface 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 block 201 is threadedly embedded in the inner surface of the threaded groove 114. The outer surface of the other side of the threaded 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 inner surface of the threaded block 201.

[0036] In this embodiment, when in use, the fixing ring 301 is provided with four oil inlet chambers 312 and four buffer chambers 311. 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, and 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 the right inside the cylinder 101, and further push the piston rod body 106 to move to the right. 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 under 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 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, making 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 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 preliminarily buffered. When the annular plate 302 moves, it pushes multiple connecting rods 309 to move, further pushing the four buffer plates 308 to move toward the polyurethane foam 310 inside the corresponding arc cover 307 and gradually squeezing 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 it is 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, it will generate viscous resistance during its flow. This part of the resistance will consume energy and also have a buffering effect, and the squeezed hydraulic oil will The oil inlet chamber 312 will enter the buffer chamber 311, and with the cooperation of the polyurethane foam 310 and the hydraulic oil filled inside, the buffer ring 108 and the sealing piston 107 will be buffered for the second time, so that the movement speed of the sealing piston 107 and the piston rod body 106 will gradually decrease, avoiding the sealing piston 107 from colliding violently with the front end cover 103, achieving smooth deceleration and stopping, and achieving a high buffering effect under the action of the buffer assembly 3. 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 assembly 3 on the right returns to its initial state, which is convenient for buffering 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 buffer assembly 3 on the left and the buffer ring 108 on the left are used to buffer the sealing piston 107 and the rear end cover 102, and reciprocating linear motion is achieved through the reciprocating moving assembly 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. It solves the problem that during the use of the hydraulic cylinder, due to inertia, the piston is prone to collision with the cylinder cover, affecting the stability and reliability of the piston rod, and easily causing deformation or even cracks in structures such as the piston and cylinder cover, thereby reducing the service life of the cylinder. 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 utilization.

[0037] Example 2: Figures 1-4 and Figures 8-11As shown, the cleaning assembly 2 includes a threaded block 201, an inner wall of the threaded block 201 is provided with a cleaning groove 212 near one side, a silicone scraper ring 211 is fixedly connected to one side of the cleaning groove 212, and an annular skeleton 213 is fixedly installed inside the silicone scraper ring 211. An embedded groove 203 is provided on the outer surface of the threaded block 201 near one side, and a micro motor 204 is installed inside the embedded groove 203 by screws. A driving gear 205 is fixedly installed on the output end of the micro motor 204, and the outer surface of the driving gear 205 is meshed with a ring gear 206. The ring gear 2 06 is fixedly installed with a fixing rod 215 on the inner wall, and a scraper 216 is fixedly installed on one end of the fixing rod 215. A V-shaped plate 202 is fixed to the outer surface of the threaded block 201 near the embedded groove 203 by 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 inner part of the annular groove 214, and the outer surface of the fixing rod 215 is movably embedded in the inner part of the annular hole 218. The outer surface of one side of the scraper 216 is connected to the inner surface of the ring gear 206. 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 inside of the two slide grooves 217. An annular tube 208 is fixedly installed on the other side of the cleaning groove 212. The outer surface of the annular tube 208 is fixedly connected to multiple suction pipes 209. The outer surface of the annular tube 208 is fixedly connected to a connecting tube 210 near the bottom surface. One end of the connecting tube 210 is fixedly passed through the bottom of the threaded 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 block 201 is threadedly embedded in the inside of the threaded groove 114. The outer surface of the other side of the threaded 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 inside of the threaded block 201.

[0038] 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 hydraulic oil leakage. 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 on the outer surface of the piston rod body 106 and fall on the outer surface of the silicone scraper ring 211, preventing 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 driving gear 205 to rotate, and then drives the ring gear 206 to rotate inside the annular groove 214, and drives the fixing rod 215 to rotate in the annular hole 218, 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 better cleaning of the piston rod body 106 later. One end of the connecting tube 210 is connected to the external dust collection equipment through a connecting piece. When the micro motor 204 is started, suction is generated by the dust collection equipment, so that multiple suction pipes 209 suck the dust and impurities scraped by the scraper 216 into the annular tube 208, and then transport the dust and impurities to the dust collector of the dust collection equipment 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.

[0039] The effect and working principle achieved by the entire 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 to the right inside the cylinder 101, and the piston rod body 106 is further pushed to move to the right. 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 installation 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 return spring 306 to squeeze and shrink. With the cooperation of the return spring 306 and the nitrile rubber pad 303, the buffer ring 108 and the sealing piston 107 are preliminarily buffered. When the annular plate 302 moves, it pushes multiple connecting rods 309 to move, further pushing the four buffer plates 308 to move in the direction of the polyurethane foam 310 inside the corresponding arc cover 307 and gradually squeezing the polyurethane foam 310. The polyurethane foam 310 inside the arc cover 307 is in a state of expansion after absorbing 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, it will generate viscous resistance during its flow. This 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 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 gradually separates from the annular plate 302, and the annular plate 302 loses its thrust. Under the elasticity of the return 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 its extrusion and gradually returns to 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 assembly 3 on the right returns to its initial state.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 assembly 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 assemblies 3. When the piston rod body 106 moves to the left, the dust and impurities on the outer surface of the piston rod body 106 are scraped off by 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 main The movable gear 205 rotates, which in turn drives the ring gear 206 to rotate inside the annular groove 214, and drives the fixed rod 215 to rotate in the annular hole 218, further driving the scraper 216 to rotate along the outer surface of the silicone scraper ring 211, scraping off the dust and impurities accumulated 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 an external dust collection device through a connecting piece. When the micro motor 204 is started, suction is generated by the dust collection device, causing the multiple suction pipes 209 to suck the dust and impurities scraped off by the scraper 216 into the annular pipe 208, and then transport the dust and impurities to the dust collector of the dust collection device through the connecting pipe 210.

[0040] 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.

[0041] 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 scope of protection of the present invention.

Claims

1. A hydraulic cylinder with high buffering performance, comprising a reciprocating component (1), wherein the reciprocating component (1) is used to drive a piston rod to reciprocate linearly, and is characterized in that: A buffer assembly (3) and a cleaning assembly (2) are provided inside the reciprocating assembly (1), wherein the buffer assembly (3) is used to buffer the piston, and the cleaning assembly (2) is used to clean dust and impurities on the outer surface of the piston rod; the reciprocating assembly (1) comprises a cylinder (101), wherein a rear end cover (102) is provided on the outer surface of one side of the cylinder (101), and a front end cover (103) is provided on the outer surface of the other side of the cylinder (101); two buffer assemblies (3) are provided, and both of the two buffer assemblies (3) comprise a fixing ring (301), and both of the outer surfaces of one side of the two fixing rings (301) are provided with a mounting groove (305), and the interiors of the two mounting grooves (305) are movable. An annular plate (302) is movably embedded therein, 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-shaped covers (307), the interiors of the eight arc-shaped covers (307) are provided with polyurethane foam (310), the interiors of the eight arc-shaped covers (307) are movably embedded with a buffer plate (308), the outer surfaces of the eight buffer plates (308) are fixedly connected with a sealing ring (313), the outer surfaces of one side of the eight buffer plates (308) are fixedly installed with four connecting rods (309), and the inner walls of the two mounting grooves (305) are provided with four oil inlet chambers (312); The cleaning assembly (2) comprises a threaded block (201), an inner wall of the threaded block (201) is provided with a cleaning groove (212) near one side, a silicone scraper ring (211) is fixedly connected to one side of the cleaning groove (212), an annular skeleton (213) is fixedly installed inside the silicone scraper ring (211), an outer surface of the threaded block (201) is provided with an embedded groove (203) near one side, a micro motor (204) is installed inside the embedded groove (203) by screws, an output end of the micro motor (204) is fixedly installed with a driving gear (205), an outer surface of the driving gear (205) is meshedly connected with a ring gear (206), 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).

2. The hydraulic cylinder with high buffering performance according to claim 1, characterized in that: A V-shaped plate (202) is installed on the outer surface of the threaded block (201) near the embedded groove (203) by bolts, an annular groove (214) is provided inside the threaded block (201), an annular hole (218) is provided on the inner wall of the cleaning groove (212), and sliding grooves (217) are provided 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).

3. The hydraulic cylinder with high buffering performance according to claim 2, 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). An annular tube (208) is fixedly installed on the other side of the cleaning groove (212), and 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, and one end of the connecting tube (210) is fixedly passed through the bottom of the threaded block (201).

4. 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), and 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 interiors of the two buffer grooves (112). The two fixing rings (301) are respectively installed in the interiors of the two buffer grooves (112) by bolts, wherein the outer surfaces of the two nitrile rubber pads (303) are respectively fixedly installed on one side of the interiors of the two mounting grooves (305).

5. The hydraulic cylinder with high buffering performance according to claim 4, 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), and 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 all fixedly connected with return springs (306), and 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). The four return springs (306) distributed on each circumference of the eight return springs (306) form a group.

6. The hydraulic cylinder with high buffering performance according to claim 5, 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 four fixing plates (304) distributed on each circumference of the eight fixing plates (304) form a group; the two nitrile rubber pads (303) distributed vertically form a group; the outer surfaces of the other sides 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) distributed on each circumference of the multiple connecting rods (309) form a group; 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).

7. The hydraulic cylinder with high buffering performance according to claim 3, characterized in that: A sealing piston (107) is movably embedded in the interior of the cylinder (101), a piston rod body (106) is provided inside the sealing piston (107), and buffer rings (108) are installed on the outer surfaces of both sides of the sealing piston (107) through bolts. A sealing groove (110) is provided near the edge of one side outer surface of the rear end cover (102) and one side outer surface of the front end cover (103), and a sealing gasket (111) is fixedly connected to one side of the interior of the two sealing grooves (110).

8. The hydraulic cylinder with high buffering performance according to claim 7, characterized in that: The outer surfaces of both sides of the cylinder (101) are movably embedded in the interior of the two sealing grooves (110), 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. The front end cover (103) and the rear end cover (102) are both provided with a connecting groove (105). The tops of the front end cover (103) and the rear end cover (102) are both fixedly connected with an oil pipe (104) near the connecting groove (105).

9. The hydraulic cylinder with high buffering performance according to claim 8, 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 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 block (201) is threadedly embedded in the threaded groove (114), the outer surface of the other side of the threaded block (201) contacts 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 block (201).

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