A buffer hydraulic cylinder

Abstract

The present invention discloses a buffered hydraulic cylinder, belonging to the technical field of hydraulic cylinders, which includes a cylinder barrel, cylinder heads and a double-headed piston rod. The cylinder heads are arranged on both sides of the cylinder barrel, and the double-headed piston rod reciprocates and slides inside the cylinder barrel; an upper cavity and a lower cavity are arranged in the middle of the cylinder head, and the upper cavity and the lower cavity are separated by a partition plate. A hydraulic oil through hole and a plurality of buffer oil through holes are arranged on the side surface of the cylinder head; both the hydraulic oil through hole and the buffer oil through hole are communicated with the lower cavity, and the buffer oil through hole is communicated with the cylinder barrel through a communication hole; an adjusting plug is rotatably arranged in the hydraulic oil through hole, and an oil nozzle is installed in the buffer oil through hole; a flow channel matching with the communication hole is arranged at the top of the adjusting plug. Through the mutual cooperation of the double-headed piston rod and the cylinder heads on both sides, the present invention can lift and operate simultaneously to both sides. By adjusting the angle of the adjusting plug, the communication of the communication hole can be controlled, and the tubing can be extruded through the tapered thread sleeve on the oil nozzle, thereby further controlling the inflow and outflow of the oil nozzle.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic cylinders, in particular to a buffer type hydraulic cylinder. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the motion is smooth, so it is widely used in the hydraulic systems of various machines. The output force of the hydraulic cylinder is proportional to the effective area of ​​the piston and the pressure difference on both sides; the hydraulic cylinder is basically composed of a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device. The buffer device and the exhaust device depend on the specific application, and other devices are indispensable.

[0003] However, the existing hydraulic cylinder cannot lift and operate both sides at the same time, lacks a double-cylinder structure, and cannot adaptively adjust the hydraulic oil flow and buffering degree. Therefore, in view of the above situation, it is urgent to develop a buffer hydraulic cylinder to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The purpose of the present invention is to provide a buffer hydraulic cylinder in order to solve the problems that the existing hydraulic cylinders cannot lift and operate on both sides at the same time, lack a double-cylinder structure, and cannot adaptively adjust the hydraulic oil flow and buffering degree.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is: a buffered hydraulic cylinder, comprising a cylinder barrel, a cylinder head and a double-headed piston rod, the cylinder head is arranged on both sides of the cylinder barrel, and the double-headed piston rod slides back and forth inside the cylinder barrel; an upper cavity and a lower cavity are arranged in the middle of the cylinder head, and the upper cavity and the lower cavity are separated by a partition, and a hydraulic oil through hole and a plurality of buffer oil through holes are arranged on the side of the cylinder head; the hydraulic oil through hole and the buffer oil through hole are both connected with the lower cavity, and the buffer oil through hole is connected with the cylinder barrel through a connecting hole; an adjusting plug is rotatably arranged in the hydraulic oil through hole, and an oil nozzle is installed in the buffer oil through hole; a flow channel cooperating with the connecting hole is arranged on the top of the adjusting plug, and a tapered threaded sleeve is arranged at the tail of the oil nozzle.

[0006] As a further solution of the present invention: a plurality of positioning grooves are arranged on the inner wall of the buffer oil through hole, a spring is arranged in the positioning groove, and a positioning ball is arranged on the top of the spring; a ball locking groove is arranged at a position on the adjusting plug corresponding to the positioning ball, and the ball locking groove is connected through a walking groove.

[0007] As a further solution of the present invention: The adjusting plug is fixed on the cylinder head through a locking cover. A rotating ring and an adjusting cap are arranged at the tail of the adjusting plug. A locking boss is arranged on the locking cover, and the locking boss limits the rotating ring. A cross-shaped rotating groove is arranged at the top of the adjusting cap.

[0008] As a further solution of the present invention: The nozzle is connected to the oil pipe, and an adjusting nut is rotatably arranged on the conical thread sleeve.

[0009] As a further solution of the present invention: Locking convex plates and a first convex ring are arranged on both sides of the cylinder barrel. A first groove is arranged on the inner side of the cylinder head. The cylinder barrel is arranged in the first groove through the first convex ring, and the cylinder barrel is fixed to the inner side of the cylinder head through the locking convex plates.

[0010] As a further solution of the present invention: The cylinder heads on both sides are also connected to a sealing cover. A second groove is arranged on the outer side of the cylinder head. A second convex ring and a locking ring are arranged at the bottom of the sealing cover. The sealing cover is arranged in the second groove through the second convex ring, and the sealing cover is fixed on the cylinder head through the locking ring. A limiting boss is arranged at the top of the sealing cover, and a main seal for the oil cylinder rod is arranged between the limiting boss and the partition plate.

[0011] As a further solution of the present invention: A mounting plate is arranged in the middle of the cylinder barrel. A plurality of reinforcing rods are arranged on both sides of the mounting plate, and threads are arranged at the ends of the reinforcing rods. Mounting round tables are arranged on both sides of the cylinder head, and the reinforcing rods are fixed to the mounting round tables through locking nuts.

[0012] As a further solution of the present invention: The double-headed piston rod includes a piston and oil cylinder rods arranged on both sides of the piston. A rod seat is arranged at the bottom of the oil cylinder rod, and a buffer sleeve is arranged at the top of the rod seat. The rod seat and the buffer sleeve have the same diameter as the lower cavity.

[0013] As a further solution of the present invention: A main seal for the piston is arranged in the middle of the piston. An anti-wear ring and an anti-pollution ring are sequentially arranged on the piston from the inside to the outside.

[0014] As a further solution of the present invention: A plurality of positioning grooves are arranged, and the interval between adjacent positioning grooves is 45 - 90 degrees.

[0015] As a further solution of the present invention: The oil pipe is made of an elastic material.

[0016] As a further solution of the present invention: The oil cylinder rod sequentially passes through the lower cavity, the upper cavity, the main seal for the oil cylinder rod and the sealing cover.

[0017] The present invention provides a buffered hydraulic cylinder through improvements. Compared with the prior art, it has the following improvements and advantages:

[0018] First: Through the mutual cooperation of the double-headed piston rod and the cylinder heads on both sides, the present invention can ensure that the buffered hydraulic cylinder lifts and operates simultaneously on both sides. This structure can greatly improve the practicality and application scenarios of the equipment, and while ensuring smooth operation, it also greatly reduces the time cost and labor cost.

[0019] Second: Through the dual cooperation of the adjusting plug and the oil nozzle, the present invention can greatly improve the adjustment ability of the buffered hydraulic cylinder. When the device is working, the communication of the communication hole can be controlled by adjusting the angle of the adjusting plug, and the three adjusting plugs can be freely adjusted and combined according to the actual use situation. And the tapered thread sleeve on the oil nozzle can squeeze the oil pipe, thereby further controlling the inflow and outflow of the oil nozzle and adaptively adjusting the buffering degree of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following further explains the present invention with reference to the drawings and embodiments:

[0021] Figure 1 is the front view of the structure of the present invention;

[0022] Figure 2 is the exploded structure schematic diagram of the cylinder head in the structure of the present invention;

[0023] Figure 3 is the rear view of the exploded structure of the cylinder head in the structure of the present invention;

[0024] Figure 4 is the exploded mating diagram of the cylinder barrel and the cylinder head in the present invention;

[0025] Figure 5 is the cross-sectional view of the sealing cover in the present invention;

[0026] Figure 6 is the cross-sectional view of the cylinder head in the present invention;

[0027] Figure 7 is the longitudinal sectional view of the cylinder head in the present invention;

[0028] Figure 8 is the Figure 7 enlarged view of the structure at A in the present invention;

[0029] Figure 9 is the exploded assembly diagram of the cylinder head, adjusting plug and oil nozzle in the present invention;

[0030] Figure 10 is the Figure 9 enlarged view of the structure at B in the present invention;

[0031] Figure 11 is an enlarged view of the structure of the adjusting plug in the present invention;

[0032] Figure 12 is an enlarged view of the structure of the nozzle in the present invention;

[0033] Figure 13 is a schematic diagram of the structure of the double-headed piston rod in the present invention;

[0034] Figure 14 is of the present invention Figure 13 an enlarged view of the structure at position C in.

[0035] Explanation of reference numerals:

[0036] 1. Cylinder barrel; 101. Mounting plate; 102. Reinforcing rod; 103. Thread; 104. Locking convex plate; 105. First convex ring; 2. Cylinder head; 201. Second groove; 202. First groove; 203. Upper cavity; 204. Lower cavity; 205. Partition board; 206. Mounting round table; 207. Locking nut; 208. Buffer oil through hole; 209. Hydraulic oil through hole; 210. Communication hole; 211. Positioning groove; 212. Spring; 213. Positioning ball; 214. Locking cover; 215. Adjusting plug; 216. Locking convex platform; 217. Flow channel; 218. Rotating ring; 219. Adjusting cap; 220. Ball locking groove; 221. Walking groove; 222. Nozzle; 223. Tapered thread sleeve; 224. Adjusting nut; 225. Oil pipe; 226. Sealing cover; 227. Main seal of the oil cylinder rod; 228. Second convex ring; 229. Locking ring; 230. Limiting convex platform; 3. Double-headed piston rod; 301. Piston; 302. Oil cylinder rod; 303. Rod seat; 304. Buffer sleeve; 305. Anti-pollution ring; 306. Anti-wear ring; 307. Main seal of the piston. Specific embodiments

[0037] The following will be combined with the attached Figures 1 to 14 The present invention will be described in detail. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] The present invention provides a buffer type hydraulic cylinder through improvement, as Figures 1 - 14As shown in the figure, a buffer hydraulic cylinder includes a cylinder barrel 1, a cylinder head 2, and a double-headed piston rod 3. The cylinder head 2 is arranged on both sides of the cylinder barrel 1, and the double-headed piston rod 3 reciprocates and slides inside the cylinder barrel 1. A upper cavity 203 and a lower cavity 204 are arranged in the middle of the cylinder head 2. The upper cavity 203 and the lower cavity 204 are separated by a partition plate 205. A hydraulic oil through hole 209 and a plurality of buffer oil through holes 208 are arranged on the side surface of the cylinder head 2. Both the hydraulic oil through hole 209 and the buffer oil through holes 208 communicate with the lower cavity 204. The buffer oil through holes 208 communicate with the cylinder barrel 1 through communication holes 210. An adjusting plug 215 is rotatably arranged in the hydraulic oil through hole 209, and an oil nozzle 222 is installed in the buffer oil through hole 208. A flow channel 217 cooperating with the communication hole 210 is arranged at the top of the adjusting plug 215, and a tapered thread sleeve 223 is arranged at the tail of the oil nozzle 222.

[0039] In this embodiment: This buffer hydraulic cylinder is mainly divided into three parts: a cylinder barrel 1, a cylinder head 2, and a double-headed piston rod 3. When this buffer hydraulic cylinder is in use, since the double-headed piston rod 3 reciprocates and slides inside the cylinder barrel 1, and the piston rod 302 on both sides sequentially passes through the lower cavity 204, the upper cavity 203, the main piston rod seal 227, and the sealing cover 226, the double-headed piston rod 3 can intermittently lift and operate both sides. The rod seat 303 and the buffer sleeve 304 have the same diameter as the lower cavity 204. When hydraulic oil is filled on the right side, the piston 301 moves to the left side, and the hydraulic oil on the left side flows back to the hydraulic oil through hole 209 and the oil nozzle 222 through the three communication holes 210 and the lower cavity 204. When the rod seat 303 and the buffer sleeve 304 move to the position of the lower cavity 204, the lower cavity 204 becomes a closed space at this time, and the hydraulic oil can only flow back to the hydraulic oil through hole 209 and the oil nozzle 222 through the three communication holes 210. Since the flow rate of the hydraulic oil is greatly reduced, the speed of the piston rod 302 and the piston 301 becomes slower, thereby achieving buffering. And after becoming a closed space, a part of the hydraulic oil in the lower cavity 204 will re-enter the cylinder barrel 1 through the three communication holes 210 to form a backflow, so this further improves the buffering ability of this buffer hydraulic cylinder. When it is necessary to adjust the flow rate to further adjust the buffering stroke, a rotating tool is placed in the cross-shaped rotating groove arranged at the top of the adjusting cap 219 and rotated. At this time, the spring 212 in the positioning groove 211 is compressed and the positioning ball 213 sequentially enters the ball locking groove 220 along the running groove 221, completing the adjustment of the relative position between the flow channel 217 and the communication hole 210, thereby changing the flow rate of the hydraulic oil. In addition, the flow rate of the oil pipe 225 can also be adjusted through the oil nozzle 222. The adjusting nut 224 is rotated towards the tail along the tapered thread sleeve 223. Under the action of the adjusting nut 224, the tapered thread sleeve 223 will squeeze the oil pipe 225, thereby adjusting the flow rate of the hydraulic oil.

[0040] Through the mutual cooperation of the double-headed piston rod 3 and the cylinder heads 2 on both sides, the present invention can ensure that the buffer hydraulic cylinder lifts and operates simultaneously on both sides. This structure can greatly improve the practicability and application scenarios of the equipment, while ensuring smooth operation, it also greatly reduces the time cost and labor cost. Through the dual cooperation of the adjusting plug 215 and the oil nozzle 222, the present invention can greatly improve the adjustment ability of the buffer hydraulic cylinder. When the device is working, by adjusting the angle of the adjusting plug 215, the communication of the communication hole 210 can be controlled, and through three adjusting plugs 215, free adjustment and combination can be carried out according to the actual use situation. And through the tapered thread sleeve 223 on the oil nozzle 222, the oil pipe 225 can be extruded, so as to further control the inflow and outflow of the oil nozzle 222 and adaptively adjust the buffering degree of the equipment.

[0041] Refer to the appendix Figure 6 - appendix Figure 11 , a plurality of positioning grooves 211 are provided on the inner wall of the buffer oil through hole 208, a spring 212 is arranged in the positioning groove 211, and a positioning ball 213 is arranged at the top of the spring 212; a ball locking groove 220 is arranged at the position corresponding to the positioning ball 213 on the adjusting plug 215, and the ball locking groove 220 is connected through a running groove 221.

[0042] In this embodiment: In order to limit the adjusting plug 215 and make it rotate at a certain angle so as to adjust the relative position between the flow channel 217 and the communication hole 210, a plurality of positioning grooves 211, specifically four, are provided on the inner wall of the buffer oil through hole 208. And a spring 212 and a positioning ball 213 are arranged in the positioning groove 211, a ball locking groove 220 is arranged at the position corresponding to the positioning ball 213 on the adjusting plug 215, and the ball locking groove 220 is connected through a running groove 221. When the adjusting plug 215 does not need to be rotated, at this time, the positioning ball 213 is fixed in the ball locking groove 220 under the action of the spring 212. When the adjusting plug 215 is rotated, at this time, the spring 212 in the positioning groove 211 is compressed and the positioning ball 213 enters the ball locking groove 220 along the running groove 221 in turn, completing the adjustment of the relative position between the flow channel 217 and the communication hole 210.

[0043] Refer to the appendix Figure 9 - appendix Figure 10 , the adjusting plug 215 is fixed on the cylinder head 2 through a locking cover 214. A rotating ring 218 and an adjusting cap 219 are arranged at the tail of the adjusting plug 215. A locking boss 216 is arranged on the locking cover 214, and the locking boss 216 limits the rotating ring 218. A cross-shaped rotating groove is arranged at the top of the adjusting cap 219.

[0044] In this embodiment: In order to ensure the free rotation of the adjusting plug 215 and fix it to the side of the cylinder head 2, a rotating ring 218 and an adjusting cap 219 are provided at the tail of the adjusting plug 215, and the locking boss 216 on the locking cover 214 limits the rotating ring 218. In order to facilitate the rotation of the adjusting plug 215 by an external tool, a cross-shaped rotating groove is provided at the top of the adjusting cap 219.

[0045] Refer to the appendix Figure 9 and the appendix Figure 12 , the nozzle 222 is connected to the oil pipe 225, and an adjusting nut 224 is rotatably provided on the tapered thread sleeve 223.

[0046] In this embodiment: In order to control and adjust the flow rate of the hydraulic oil through the nozzle 222, a tapered thread sleeve 223 is provided on the nozzle 222. When the adjusting nut 224 rotates towards the tail along the tapered thread sleeve 223, the tapered thread sleeve 223 will squeeze the oil pipe 225 under the action of the adjusting nut 224, thereby adjusting the flow rate of the hydraulic oil.

[0047] Refer to the appendix Figure 3 - the appendix Figure 4 and the appendix Figure 7 , locking convex plates 104 and first convex rings 105 are provided on both sides of the cylinder barrel 1, a first groove 202 is provided on the inner side of the cylinder head 2, the cylinder barrel 1 is arranged in the first groove 202 through the first convex ring 105, and the cylinder barrel 1 is fixed to the inner side of the cylinder head 2 through the locking convex plate 104.

[0048] In this embodiment: In order to improve the tightness between the cylinder barrel 1 and the cylinder heads 2 on both sides, locking convex plates 104 and first convex rings 105 are provided on both sides of the cylinder barrel 1, and a first groove 202 is provided on the inner side of the cylinder head 2. When assembling and installing the equipment, first insert the first convex ring 105 into the first groove 202, and then fix the locking convex plate 104 to the cylinder head 2 through a locking bolt.

[0049] Refer to the appendix Figure 1 - the appendix Figure 5 , the cylinder heads 2 on both sides are also connected to the sealing cover 226, a second groove 201 is provided on the outer side of the cylinder head 2, and a second convex ring 228 and a locking ring 229 are provided at the bottom of the sealing cover 226; the sealing cover 226 is arranged in the second groove 202 through the second convex ring 228, and the sealing cover 226 is fixed on the cylinder head 2 through the locking ring 229; a limiting boss 230 is provided at the top of the sealing cover 226, and a main seal 227 for the oil cylinder rod is provided between the limiting boss 230 and the partition plate 205.

[0050] In this embodiment: To improve the tightness between the cylinder head 2 and the double-headed piston rod 3 and prevent hydraulic oil leakage, the cylinder heads 2 on both sides are connected to the sealing cover 226. To further improve the sealing performance, a second groove 201 is provided on the outer side of the cylinder head 2, and a second convex ring 228 and a locking ring 229 are provided at the bottom of the sealing cover 226. When assembling and installing the equipment, first insert the second convex ring 228 into the second groove 201, and then fix the locking ring 229 to the cylinder head 2 through a locking bolt. Among them, the main seal 227 of the oil cylinder rod is arranged in the space composed of the limiting boss 230 and the partition plate 205.

[0051] Refer to the appendix Figure 1 - appendix Figure 4 , a mounting plate 101 is provided in the middle of the cylinder barrel 1, multiple reinforcing bars 102 are provided on both sides of the mounting plate 101, and threads 103 are provided at the ends of the reinforcing bars 102; mounting round tables 206 are provided on both sides of the cylinder head 2, and the reinforcing bars 102 are fixed to the mounting round tables 206 through locking nuts 207.

[0052] In this embodiment: To facilitate the installation of this buffer hydraulic cylinder into a production line or equipment, a mounting plate 101 is provided in the middle of the cylinder barrel 1. To improve the strength and stability of the device, multiple reinforcing bars 102 are provided on both sides of the mounting plate 101, and multiple mounting round tables 206 are provided on both sides of the cylinder head 2, and the reinforcing bars 102 are fixed to the mounting round tables 206 through locking nuts 207.

[0053] Refer to the appendix Figure 13 - appendix Figure 14 , the double-headed piston rod 3 includes a piston 301 and oil cylinder rods 302 arranged on both sides of the piston 301. A rod seat 303 is provided at the bottom of the oil cylinder rod 302, a buffer sleeve 304 is provided at the top of the rod seat 303, and the rod seat 303 and the buffer sleeve 304 have the same diameter as the lower cavity 204.

[0054] In this embodiment: To facilitate intermittent lifting and operation on both sides, the double-headed piston rod 3 is designed as a structure with a piston 301 in the middle and oil cylinder rods 302 arranged on both sides of the piston 301. To seal the lower cavity 204, a rod seat 303 is provided at the bottom of the oil cylinder rod 302. To improve the buffer performance and prevent damage to the equipment caused by excessive stress, a buffer sleeve 304 is provided at the top of the rod seat 303, and the rod seat 303 and the buffer sleeve 304 have the same diameter as the lower cavity 204.

[0055] Refer to the appendix Figure 13 - appendix Figure 14 , a main piston seal 307 is provided in the middle of the piston 301, and an anti-wear ring 306 and an anti-fouling ring 305 are sequentially arranged on the piston 301 from the inside to the outside.

[0056] In this embodiment: In order to improve the sealing performance and working performance of the piston 301, a main piston seal 307 is provided in the middle of the piston 301, and an anti-wear ring 306 and an anti-fouling ring 305 are sequentially provided on the piston 301 from the inside to the outside.

[0057] Refer to the appendix Figure 5 - appendix Figure 11 , there are four positioning grooves 211, and the adjacent positioning grooves 211 are spaced 45 - 90 degrees apart.

[0058] In this embodiment: In order to adjust the relative position between the flow channel 217 and the communication hole 210, a plurality of positioning grooves 211 are provided. Moreover, the adjacent positioning grooves 211 are spaced between 45 - 90 degrees, which can be adjusted according to actual needs. Different spacing angles can change the relative position between the flow channel 217 and the communication hole 210. For example, when the adjacent positioning grooves 211 are spaced 90 degrees apart, rotating 90 degrees completely closes the flow channel 217. When the angle is 45 degrees, rotating 45 degrees approximately closes half of the flow channel 217.

[0059] Embodiment 1: Since the double-headed piston rod 3 reciprocates inside the cylinder barrel 1, and the cylinder rod 302 on both sides sequentially passes through the lower cavity 204, the upper cavity 203, the main seal 227 of the cylinder rod and the seal cover 226, the double-headed piston rod 3 can intermittently lift and operate on both sides. The rod seat 303 and the buffer sleeve 304 have the same diameter as the lower cavity 204. When hydraulic oil is filled on the right side, the piston 301 moves to the left side, and the hydraulic oil on the left side flows back to the hydraulic oil through hole 209 and the nozzle 222 through the three communication holes 210 and the lower cavity 204. When the rod seat 303 and the buffer sleeve 304 move to the position of the lower cavity 204, the lower cavity 204 becomes a closed space at this time, and the hydraulic oil can only flow back to the hydraulic oil through hole 209 and the nozzle 222 through the three communication holes 210 at this time. Since the flow rate of the hydraulic oil is greatly reduced, the speed of the cylinder rod 302 and the piston 301 becomes slower, thereby realizing buffering. And after becoming a closed space, a part of the hydraulic oil in the lower cavity 204 will re-enter the cylinder barrel 1 through the three communication holes 210 to form a backflow, so this further improves the buffering capacity of this buffer type hydraulic cylinder. When it is necessary to adjust the flow rate to further adjust the buffer stroke, a rotating tool is placed in the cross-shaped rotating groove provided at the top of the adjusting cap 219 and rotated. At this time, the spring 212 in the positioning groove 211 is compressed and the positioning ball 213 sequentially enters the ball locking groove 220 along the traveling groove 221, completing the adjustment of the relative position between the flow channel 217 and the communication hole 210, thereby changing the flow rate of the hydraulic oil. In addition, the flow rate of the oil pipe 225 can also be adjusted through the nozzle 222. The adjusting nut 224 is rotated towards the tail along the tapered thread sleeve 223, and under the action of the adjusting nut 224, the tapered thread sleeve 223 will squeeze the oil pipe 225, thereby adjusting the flow rate of the hydraulic oil.

[0060] Embodiment 2: Through the mutual cooperation of the double-headed piston rod 3 and the cylinder heads 2 on both sides, the present invention can ensure that the buffer hydraulic cylinder lifts and operates simultaneously on both sides. This structure can greatly improve the practicability and application scenarios of the equipment, and while ensuring smooth operation, it also greatly reduces the time cost and labor cost. Through the dual cooperation of the adjusting plug 215 and the oil nozzle 222, the present invention can greatly improve the adjustment ability of the buffer hydraulic cylinder. When the device is working, by adjusting the angle of the adjusting plug 215, the communication of the communication hole 210 can be controlled, and through three adjusting plugs 215, free adjustment and combination can be carried out according to the actual use situation. And through the tapered thread sleeve 223 on the oil nozzle 222, the oil pipe 225 can be extruded, thereby further controlling the inflow and outflow of the oil nozzle 222 and adaptively adjusting the buffering degree of the equipment. In order to adjust the relative position between the flow channel 217 and the communication hole 210, a plurality of positioning grooves 211 are provided. Moreover, the interval between adjacent positioning grooves 211 is between 45 - 90 degrees, which can be adjusted according to actual needs, and different interval angles can change the relative position between the flow channel 217 and the communication hole 210. For example, when the interval between adjacent positioning grooves 211 is 90 degrees, rotating 90 degrees completely closes the flow channel 217. When the angle is 45 degrees, rotating 45 degrees approximately closes half of the flow channel 217.

[0061] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and creative features disclosed herein.

Claims

1. A buffer type hydraulic cylinder, comprising a cylinder barrel (1), a cylinder head (2) and a double-headed piston rod (3), Characterized in that: The cylinder heads (2) are arranged on both sides of the cylinder barrel (1), and the double-headed piston rod (3) reciprocates and slides inside the cylinder barrel (1); a upper cavity (203) and a lower cavity (204) are arranged in the middle of the cylinder head (2), the upper cavity (203) and the lower cavity (204) are separated by a partition plate (205), and a hydraulic oil through hole (209) and a plurality of buffer oil through holes (208) are arranged on the side surface of the cylinder head (2); the hydraulic oil through hole (209) and the buffer oil through holes (208) are both communicated with the lower cavity (204), and the buffer oil through holes (208) are communicated with the cylinder barrel (1) through communication holes (210); an adjusting plug (215) is rotatably arranged in the buffer oil through holes (208), and an oil nozzle (222) is installed in the hydraulic oil through hole (209); a flow channel (217) matching with the communication hole (210) is arranged at the top of the adjusting plug (215), and a tapered thread sleeve (223) is arranged at the tail of the oil nozzle (222); a plurality of positioning grooves (211) are arranged on the inner wall of the buffer oil through holes (208), springs (212) are arranged in the positioning grooves (211), and positioning balls (213) are arranged at the tops of the springs (212); a ball locking groove (220) is arranged at the position corresponding to the positioning ball (213) on the adjusting plug (215), and the ball locking groove (220) is connected through a running groove (221); the adjusting plug (215) is fixed to the cylinder head (2) through a locking cover (214), a rotating ring (218) and an adjusting cap (219) are arranged at the tail of the adjusting plug (215), a locking boss (216) is arranged on the locking cover (214), the locking boss (216) limits the rotating ring (218), and a cross-shaped rotating groove is arranged at the top of the adjusting cap (219); the oil nozzle (222) is connected with a oil pipe (225), and an adjusting nut (224) is rotatably arranged on the tapered thread sleeve (223).

2. A buffer type hydraulic cylinder according to claim 1, Characterized in that: Locking convex plates (104) and first convex rings (105) are arranged on both sides of the cylinder barrel (1), a first groove (202) is arranged on the inner side of the cylinder head (2), the cylinder barrel (1) is arranged in the first groove (202) through the first convex ring (105), and the cylinder barrel (1) is fixed to the inner side of the cylinder head (2) through the locking convex plates (104).

3. A buffer type hydraulic cylinder according to claim 1, Characterized in that: The cylinder heads (2) on both sides are also connected to a sealing cover (226). A second groove (201) is provided on the outer side of the cylinder head (2), and a second convex ring (228) and a locking ring (229) are provided at the bottom of the sealing cover (226); the sealing cover (226) is arranged in the second groove (201) through the second convex ring (228), and the sealing cover (226) is fixed to the cylinder head (2) through the locking ring (229); a limiting boss (230) is provided at the top of the sealing cover (226), and a main seal (227) of the oil cylinder rod is arranged between the limiting boss (230) and the partition plate (205).

4. A buffer hydraulic cylinder according to claim 1, wherein: An installation plate (101) is provided in the middle of the cylinder barrel (1), and multiple reinforcing rods (102) are provided on both sides of the installation plate (101). Threads (103) are provided at the ends of the reinforcing rods (102); installation round tables (206) are provided on both sides of the cylinder head (2), and the reinforcing rods (102) are fixed to the installation round tables (206) through locking nuts (207).

5. A buffer hydraulic cylinder according to claim 1, wherein: The double-headed piston rod (3) includes a piston (301) and oil cylinder rods (302) arranged on both sides of the piston (301). A rod seat (303) is provided at the bottom of the oil cylinder rod (302), a buffer sleeve (304) is provided at the top of the rod seat (303), and the rod seat (303) and the buffer sleeve (304) have the same diameter as the lower cavity (204).

6. A buffer hydraulic cylinder according to claim 5, wherein: A main piston seal (307) is provided in the middle of the piston (301), and an anti-wear ring (306) and an anti-fouling ring (305) are sequentially arranged on the piston (301) from the inside to the outside.

7. A buffer hydraulic cylinder according to claim 1, wherein: A plurality of positioning grooves (211) are evenly arranged, and the interval between adjacent positioning grooves (211) is 45 degrees.

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