Constant speed cylinder

Abstract

The present invention discloses a constant velocity oil cylinder, comprising a cylinder body, a piston rod, a first piston and a second piston, the piston rod is provided with a first guide sleeve, a second guide sleeve and a stop tube, the first piston, the stop tube and the second piston divide the cylinder body into a rod head end oil chamber and a cylinder bottom end oil chamber with equal pressure, the cylinder body, the first piston, the second piston, the stop tube and the rod head end oil chamber and the cylinder bottom end oil chamber form a sealing structure, the cylinder body is also provided with a first oil port seat, a second oil port seat and a third oil port seat, the first oil port seat and the second oil port seat are connected, the first oil port seat and the second oil port seat are connected with the cylinder bottom end oil chamber, the third oil port seat is connected with the rod head end oil chamber, the first oil port seat, the second oil port seat and the third oil port seat enter hydraulic oil to push the first piston and the second piston to reciprocate to realize the constant velocity motion of the oil cylinder. Through the above method, the constant velocity oil cylinder of the present invention can achieve consistent extension and retraction speed, meet the use requirements, have a simple structure and a long service life.

Description

Technical Field

[0001] The invention relates to the field of oil cylinders, in particular to a constant speed oil cylinder. Background Art

[0002] Ordinary hydraulic cylinders have a piston rod extending only at one end. Because of the relationship between the effective area, the effective area of ​​the piston chamber is greater than the effective area of ​​the piston rod chamber. Generally, the extension speed is slow and the retraction speed is fast. This situation cannot meet the working requirements of mechanical equipment. The constant speed hydraulic cylinder uses the equal effective area at both ends of the hydraulic cylinder to transmit the hydraulic cylinder, and there are piston rods extending at both ends of the cylinder. The extension and retraction speeds are equal, which can well meet the working requirements of specific equipment. Summary of the invention

[0003] The main technical problem solved by the present invention is to provide a constant speed oil cylinder which can achieve consistent extension and retraction speeds, meet use requirements, have a simple structure and a long service life.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a constant speed oil cylinder, including a cylinder body, a piston rod arranged in the cylinder body, a first piston and a second piston installed on the piston rod, the first piston and the second piston are connected, and the piston rod is provided with a first guide sleeve, a second guide sleeve and a stop tube, the first piston, the stop tube and the second piston divide the cylinder body into a rod head end oil chamber and a cylinder bottom end oil chamber with equal pressure, the cylinder body, the first piston, the second piston, the stop tube, the rod head end oil chamber and the cylinder bottom end oil chamber form a sealing structure, the cylinder body is also provided with a first oil port seat, a second oil port seat and a third oil port seat, the first oil port seat and the second oil port seat are connected, the first oil port seat and the second oil port seat are connected to the cylinder bottom end oil chamber, the third oil port seat is connected to the rod head end oil chamber, the first oil port seat, the second oil port seat and the third oil port seat enter hydraulic oil to push the first piston and the second piston to reciprocate to realize the constant speed motion of the cylinder.

[0005] In a preferred embodiment of the present invention, the contact area between the left side of the first piston and the hydraulic oil is equal to the contact area between the right side of the second piston and the hydraulic oil.

[0006] In a preferred embodiment of the present invention, the first guide sleeve, the stop tube and the first piston are arranged on the piston rod in sequence from left to right, and the second guide sleeve is arranged at the right end of the cylinder body.

[0007] In a preferred embodiment of the present invention, a first sealing assembly, a second sealing assembly, a third sealing assembly and a fourth sealing assembly are further provided in the cylinder body.

[0008] In a preferred embodiment of the present invention, the first sealing assembly is arranged on the first guide sleeve, and the first sealing assembly includes a first dust ring, a first O-ring retaining ring, a first O-ring, a first opening retaining ring, a first rod sealing ring, a first sliding sleeve and a first wire retaining ring, which are arranged in sequence from left to right.

[0009] In a preferred embodiment of the present invention, the second sealing assembly is disposed on the stop tube, and the second sealing assembly includes a second O-ring disposed on the stop tube.

[0010] In a preferred embodiment of the present invention, the third sealing assembly is arranged on the first piston and the second piston, and the third sealing assembly includes a second wire retaining ring, a guide ring, a retaining ring, a third O-ring and a hole sealing ring, and the second wire retaining ring is arranged on the piston rod, and the guide ring, the retaining ring, the third O-ring and the hole seal are arranged on the first piston and the second piston.

[0011] In a preferred embodiment of the present invention, the fourth sealing assembly is arranged on the second guide sleeve, and the fourth sealing assembly includes a second dust ring, a second O-ring retaining ring, a fourth O-ring, a second opening retaining ring, a second rod sealing ring, a second sliding sleeve and a third wire retaining ring arranged from right to left.

[0012] The beneficial effects of the present invention are as follows: the constant speed oil cylinder of the present invention can achieve consistent extension and retraction speeds, meet use requirements, has a simple structure and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0014] Figure 1 It is a structural schematic diagram of a preferred embodiment of the constant speed oil cylinder of the present invention;

[0015] Figure 2 yes Figure 1 A partial cross-sectional view of the constant velocity cylinder shown;

[0016] Figure 3 It is a schematic diagram of the enlarged local structure of 2;

[0017] The markings of the components in the accompanying drawings are as follows: 1. cylinder body, 2. piston rod, 3. first piston, 4. second piston, 5. first guide sleeve, 6. second guide sleeve, 7. stop tube, 8. oil chamber at the rod head end, 9. oil chamber at the bottom end of the cylinder, 10. first oil port seat, 11. second oil port seat, 12. third oil port seat, 13. first sealing assembly, 14. second sealing assembly, 15. third sealing assembly, 16. fourth sealing assembly, 131. first dust ring, 132. first O-ring retaining ring, 133. first O-ring, 134. first open retaining ring, 135. first rod sealing ring, 136. first sliding sleeve, 137. first wire retaining ring, 141. second O-ring, 151. second wire retaining ring, 152. Guide ring, 153. Retaining ring, 154. Third O-ring, 155. Sealing ring for hole, 161. Second dust ring, 162. Second O-ring retaining ring, 163. Fourth O-ring, 164. Second opening retaining ring, 165. Second sealing ring for rod, 166. Second sliding bushing, 167. Third wire retaining ring. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments 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.

[0019] See also Figure 1 A constant speed oil cylinder comprises a cylinder body 1, a piston rod 2 arranged in the cylinder body, a first piston 3 and a second piston 4 installed on the piston rod, the first piston 3 and the second piston 4 are connected, a first guide sleeve 5, a second guide sleeve 6 and a stop tube 7 are arranged on the piston rod 2, the first piston 3, the stop tube 7 and the second piston 4 divide the cylinder body 1 into a rod head end oil chamber 8 and a cylinder bottom end oil chamber 9 with equal pressure, the cylinder body 1, the first piston 3, the second piston 4, the stop tube 7, the rod head end oil chamber 8 and the cylinder bottom end oil chamber 9 The oil chamber 9 forms a sealing structure, and the cylinder body 1 is also provided with a first oil port seat 10, a second oil port seat 11 and a third oil port seat 12. The first oil port seat 10 and the second oil port seat 11 are connected, the first oil port seat 10 and the second oil port seat 11 are connected to the oil chamber 9 at the bottom end of the cylinder, and the third oil port seat 12 is connected to the oil chamber 8 at the rod head end. The first oil port seat 10, the second oil port seat 11 and the third oil port seat 12 enter the hydraulic oil to push the first piston 3 and the second piston 4 to reciprocate to realize the constant speed motion of the oil cylinder.

[0020] In addition, the contact area between the left side of the first piston 3 and the hydraulic oil is equal to the contact area between the right side of the second piston 4 and the hydraulic oil. Since the contact areas between the first piston 3 and the second piston 4 and the hydraulic oil are equal, the piston rod can extend and retract at a constant speed.

[0021] In addition, the first guide sleeve 5 , the stop tube 7 and the first piston 3 are arranged on the piston rod 2 in sequence from left to right, and the second guide sleeve 6 is arranged at the right end of the cylinder body 1 .

[0022] In addition, a first sealing assembly 13 , a second sealing assembly 14 , a third sealing assembly 15 and a fourth sealing assembly 16 are also provided in the cylinder body 1 .

[0023] In addition, the first sealing assembly 13 is arranged on the first guide sleeve 5, and the first sealing assembly 13 includes a first dust ring 131, a first O-ring retaining ring 132, a first O-ring 133, a first opening retaining ring 134, a first rod sealing ring 135, a first sliding sleeve 136 and a first wire retaining ring 137 which are arranged from left to right.

[0024] In addition, the second sealing assembly 14 is disposed on the stop tube 7 , and the second sealing assembly 14 includes a second O-ring 141 disposed on the stop tube 7 .

[0025] In addition, the third sealing assembly 15 is arranged on the first piston 3 and the second piston 4, and the third sealing assembly 15 includes a second steel wire retaining ring 151, a guide ring 152, a retaining ring 153, a third O-ring 154 and a hole sealing ring 155. The second steel wire retaining ring 151 is arranged on the piston rod 2, and the guide ring 152, the retaining ring 153, the third O-ring 154 and the hole sealing 155 are arranged on the first piston 3 and the second piston 4.

[0026] In addition, the fourth sealing assembly 16 is arranged on the second guide sleeve 6, and the fourth sealing assembly 16 includes a second dust ring 161, a second O-ring retaining ring 162, a fourth O-ring 163, a second opening retaining ring 164, a second rod sealing ring 165, a second sliding sleeve 166 and a third wire retaining ring 167 which are arranged from right to left.

[0027] Different from the prior art, the constant-speed cylinder of the present invention can achieve consistent extension and retraction speeds, effectively solve the problems of shaking, abnormal noise and oil leakage of the cylinder during operation, meet the use requirements, have a simple structure and a long service life.

[0028] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A constant velocity cylinder, comprising a cylinder body, a piston rod disposed in the cylinder body, a first piston and a second piston mounted on the piston rod, wherein the first piston and the second piston are connected, characterized in that: The piston rod is provided with a first guide sleeve, a second guide sleeve and a stop tube, the first piston, the stop tube and the second piston divide the cylinder body into a rod head end oil chamber and a cylinder bottom end oil chamber with equal pressure, the cylinder body, the first piston, the second piston, the stop tube, the rod head end oil chamber and the cylinder bottom end oil chamber form a sealing structure, the cylinder body is also provided with a first oil port seat, a second oil port seat and a third oil port seat, the first oil port seat and the second oil port seat are connected, the first oil port seat and the second oil port seat are connected with the cylinder bottom end oil chamber, the third oil port seat is connected with the rod head end oil chamber, the first oil port seat, the second oil port seat and the third oil port seat enter hydraulic oil to push the first piston and the second piston to reciprocate to realize the constant speed motion of the cylinder.

2. The constant velocity cylinder according to claim 1, characterized in that: The contact area between the left side of the first piston and the hydraulic oil is equal to the contact area between the right side of the second piston and the hydraulic oil.

3. The constant velocity cylinder according to claim 2, characterized in that: The first guide sleeve, the stop tube and the first piston are arranged on the piston rod in sequence from left to right, and the second guide sleeve is arranged at the right end of the cylinder body.

4. The constant velocity cylinder according to any one of claims 1 to 3, characterized in that: The cylinder body is also provided with a first sealing assembly, a second sealing assembly, a third sealing assembly and a fourth sealing assembly.

5. The constant velocity cylinder according to claim 4, characterized in that: The first sealing assembly is arranged on the first guide sleeve, and the first sealing assembly includes a first dust ring, a first O-ring retaining ring, a first O-ring, a first opening retaining ring, a first rod sealing ring, a first sliding sleeve and a first wire retaining ring, which are arranged in sequence from left to right.

6. The constant velocity cylinder according to claim 4, characterized in that: The second sealing assembly is arranged on the stop tube, and the second sealing assembly comprises a second O-ring arranged on the stop tube.

7. The constant velocity cylinder according to claim 4, characterized in that: The third sealing assembly is arranged on the first piston and the second piston, and the third sealing assembly includes a second steel wire retaining ring, a guide ring, a retaining ring, a third O-ring and a hole sealing ring. The second steel wire retaining ring is arranged on the piston rod, and the guide ring, the retaining ring, the O-ring and the hole sealing are arranged on the first piston and the second piston.

8. The constant velocity cylinder according to claim 4, characterized in that: The fourth sealing assembly is arranged on the second guide sleeve, and the fourth sealing assembly includes a second dust ring, a second O-ring retaining ring, a fourth O-ring, a second opening retaining ring, a second rod sealing ring, a second sliding sleeve and a third wire retaining ring, which are arranged in sequence from right to left.

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