Hydraulic oil cylinder with double buffering devices
By setting buffer devices on the front and rear sides of the hydraulic cylinder piston to absorb the impact pressure of the piston rod, the collision problem between the piston and the cylinder head and cylinder cover is solved, achieving the effect of reducing noise and extending service life.
Patent Information
- Application Number
- CN202423038324.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-12-09
AI Technical Summary
When the piston rod of an existing hydraulic cylinder extends or retracts, the piston generates an impact force with the cylinder head and cylinder cover, causing noise and reducing component stability, thus shortening service life.
A first buffer device and a second buffer device are respectively provided on the front and rear sides of the piston to absorb the impact pressure during the extension or retraction of the piston rod, reduce the impact force, and reduce noise and wear.
The buffer device reduces the impact force between the piston and the cylinder head and cylinder cover, reduces noise, avoids component damage, and increases the service life of the hydraulic cylinder.
Smart Images
Figure CN223359566U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of die-casting die accessories, in particular to a hydraulic oil cylinder with a double buffer device. Background Art
[0002] Cylinders are also known as hydraulic cylinders. They are often used in die-casting molds to control the opening and closing of the die. During die-casting machine operation, hydraulic oil is pumped into the cylinder, causing the piston to move, thereby driving the die opening and closing. By controlling the flow of hydraulic oil within the cylinder, the speed and position of the die opening and closing can be precisely controlled. The die-casting mold cylinder plays a crucial role in the die-casting process.
[0003] During the extension or retraction of the piston rod of the current hydraulic cylinder, the piston will generate an impact force with the cylinder head and cylinder cover, which will produce noise during use and affect the stability of the connection between the components of the entire hydraulic cylinder. After long-term operation, it is easy to cause deformation or even damage between the components, thereby reducing the service life of the hydraulic cylinder.
[0004] Therefore, improvements must be made to the above-mentioned defects. Utility Model Content
[0005] The purpose of the present invention is to solve at least part of the above existing problems and bring corresponding beneficial effects.
[0006] In order to solve the above technical problems, the utility model provides a hydraulic cylinder with a double buffer device, including a cylinder barrel, a cylinder head matching the cylinder barrel is provided at the front end of the cylinder barrel, and a cylinder cover matching the cylinder barrel is provided at the rear end of the cylinder barrel. A piston rod passes through the cylinder head, and the rear end of the piston rod is provided in the cylinder barrel. A piston is provided at the rear end of the piston rod, a first buffer device is provided on the piston rod on the front side of the piston, and a second buffer device is provided on the piston rod on the rear side of the piston.
[0007] Furthermore, a large oil cylinder chamber is provided in the cylinder barrel, a first small oil cylinder chamber connected to the large oil cylinder chamber is provided in the middle of the cylinder head, and a second small oil cylinder chamber connected to the large oil cylinder chamber is provided in the middle of the front end surface of the cylinder cover.
[0008] Furthermore, a flange plate is connected to the front end of the cylinder head.
[0009] Furthermore, a first guide sleeve mounting hole is provided in the middle of the flange plate, and a guide sleeve is provided on the first guide sleeve mounting hole.
[0010] Furthermore, a second guide sleeve mounting hole communicating with the first small oil cylinder chamber is provided on the front end surface of the cylinder head, the rear end of the guide sleeve is embedded in the second guide sleeve mounting hole, a circular groove communicating with the first guide sleeve mounting hole is provided on the rear end surface of the flange plate, and a convex ring matching the circular groove is provided on the outer wall of the guide sleeve.
[0011] Furthermore, an oil outlet hole communicating with the first small oil cylinder chamber is provided on the outer wall of the cylinder head, and an oil inlet hole communicating with the second small oil cylinder chamber is provided on the outer wall of the cylinder cover.
[0012] Furthermore, the first buffer device and the second buffer device are both buffer rings.
[0013] Beneficial effects:
[0014] The utility model provides a first buffer device on the front side of the piston and a second buffer device on the rear side of the piston, which can reduce the impact force generated between the piston and the cylinder head and cylinder cover. The first buffer device and the second buffer device absorb the impact pressure generated during the extension or retraction of the piston rod, relieve the back pressure, reduce noise and impact, avoid easy damage to various components, and thus improve the service life of the hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the main plan structure of a hydraulic oil cylinder with a double buffer device of the utility model;
[0016] Figure 2 The utility model is a schematic diagram of a hydraulic oil cylinder with a double buffer device when viewed from above.
[0017] In the figure: 1. Piston rod; 2. Guide sleeve; 3. Flange plate; 4. First buffer device; 5. Piston; 6. Second buffer device; 7. Second small oil cylinder chamber; 8. Locking nut; 9. Bolt; 10. Oil inlet hole; 11. Cylinder head; 12. Large oil cylinder chamber; 13. Cylinder barrel; 14. First small oil cylinder chamber; 15. Cylinder head; 16. Oil outlet hole. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solutions and advantages of the technical solutions of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the specific embodiments of the present disclosure.
[0019] The same reference numerals in the accompanying drawings represent the same components. It should be noted that the embodiments described are only part of the embodiments of the present disclosure, rather than all the embodiments.
[0020] Based on the described embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present disclosure.
[0021] like Figures 1 to 2 As shown, the utility model provides a hydraulic cylinder with a double buffer device, including a cylinder barrel 13, a cylinder head 15 matching the cylinder barrel 13 is provided at the front end of the cylinder barrel 13, and a cylinder cover 11 matching the cylinder barrel 13 is provided at the rear end of the cylinder barrel 13. A piston rod 1 passes through the cylinder head 15, and the rear end of the piston rod 1 is arranged in the cylinder barrel 13. A piston 5 is provided at the rear end of the piston rod 1, and a first buffer device 4 is provided on the piston rod 1 on the front side of the piston 5, and a second buffer device 2 is provided on the piston rod 1 on the rear side of the piston 5.
[0022] This technical solution provides a first buffer device 4 on the front side of the piston 5 and a second buffer device 6 on the rear side of the piston 5, which can reduce the impact force generated between the piston 5 and the cylinder head 15 and the cylinder cover 11. The first buffer device 4 and the second buffer device 6 absorb the impact pressure generated during the extension or retraction of the piston rod 1, relieve back pressure, reduce noise and impact, and avoid easy damage to various components, thereby improving the service life of the hydraulic cylinder.
[0023] Furthermore, a large cylinder chamber 12 is provided within the cylinder barrel 13, a first small cylinder chamber 14 is provided in the middle of the cylinder head 15, and is in communication with the large cylinder chamber 12. A second small cylinder chamber 7 is provided in the middle of the front end surface of the cylinder cover 11, and is in communication with the large cylinder chamber 12. When the piston rod 1 extends or retracts, the piston 5 moves from the large cylinder chamber 12 to the first small cylinder chamber 14 or the second small cylinder chamber 7, which slows down the impact force between the piston 5 and the cylinder head 15 and cylinder cover 11, reducing noise and preventing damage to various components, thereby extending the service life of the hydraulic cylinder.
[0024] For example, in some embodiments, the front end of the cylinder head 15 is connected to a flange plate 3. The flange plate 3 is provided with four bolt holes, each of which is fitted with a bolt 9. Each bolt 9 is located on the outside of the cylinder barrel 13. Through holes corresponding to the four bolt holes are provided at the four corners of the cylinder head 11. The rear ends of the bolts 9 extend through these through holes, and lock nuts 8 are attached to the bolts 9 at the rear of the through holes. This facilitates overall installation and maintenance. The bolts 9 are hexagon socket head bolts, making them easier to install on the flange plate 3. They also do not protrude from the front end of the flange plate 3, preventing protruding bolts from interfering with installation.
[0025] For example, in some embodiments, a first guide sleeve mounting hole is provided in the middle of the flange plate 3, and a guide sleeve 2 is provided on the first guide sleeve mounting hole. The guide sleeve 2 can ensure the normal movement of the piston rod 1 and can also seal the hydraulic cylinder.
[0026] For example, in some embodiments, the front end of the cylinder head 15 is provided with a second guide sleeve mounting hole that communicates with the first small oil cylinder chamber 14. The rear end of the guide sleeve 2 is embedded in the second guide sleeve mounting hole. The rear end of the flange plate 3 is provided with a circular groove that communicates with the first guide sleeve mounting hole. A raised ring that mates with the circular groove is provided on the outer wall of the guide sleeve 2. This allows the guide sleeve 2 to be secured by the cylinder head 15 and the cylinder barrel 13, ensuring the stability of the guide sleeve 2.
[0027] For example, in some embodiments, an oil outlet 16 is provided on the outer wall of the cylinder head 15, communicating with the first small cylinder chamber 14, and an oil inlet 10 is provided on the outer wall of the cylinder head 11, communicating with the second small cylinder chamber 7. Hydraulic oil enters the second small cylinder chamber 7 through the oil inlet 10, and then the piston 5 moves, causing the hydraulic oil to flow from the second small cylinder chamber 7 through the large cylinder chamber 12 to the first small cylinder chamber 14, and then be discharged through the oil outlet 16. This technology is prior art and will not be described in detail here.
[0028] For example, in some embodiments, the first buffer device 4 and the second buffer device 6 are both buffer rings. The buffer rings are made of HBY or HBTS, and such buffer rings have the following characteristics:
[0029] Cushioning and shock absorption: It can effectively absorb the impact pressure generated on the piston rod side of the hydraulic cylinder, relieve back pressure, and reduce vibration and thermal corrosion.
[0030] High temperature and wear resistance: It can maintain stable performance in high temperature environment, with low wear and tear, thus extending service life.
[0031] Low friction and low leakage: The design optimizes the friction characteristics, reduces the friction resistance of the seal and reduces leakage.
[0032] Strong versatility: easy to install and maintain.
[0033] The first buffer device 4 and the second buffer device 6 can provide reliable sealing performance and anti-collision capability in a harsh working environment in the hydraulic cylinder system, thereby improving the use effect of the hydraulic cylinder.
[0034] To sum up, the utility model provides a first buffer device on the front side of the piston and a second buffer device on the rear side of the piston, which can reduce the impact force generated between the piston and the cylinder head and cylinder cover. The first buffer device and the second buffer device absorb the impact pressure generated during the extension or retraction of the piston rod, relieve the back pressure, reduce noise and impact, and avoid easy damage to various components, thereby improving the service life of the hydraulic cylinder.
[0035] The words “first”, “second” and similar terms used in the specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as “a”, “an” or “the” do not indicate a quantity limitation, but rather indicate the presence of at least one. Words such as “include” or “comprise” mean that the elements or objects appearing before “include” or “comprises” include the elements or objects listed after “include” or “comprises” and their equivalents, and do not exclude other elements or objects. “Up”, “down”, “left”, “right” and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.
[0036] The above-mentioned preferred embodiments of the present invention are only preferred embodiments and are not intended to limit the present invention. The scope of protection of the present invention is defined by the appended claims. For ordinary technicians in this field, other embodiments can be obtained based on the drawings without creative work, and any changes based on the claims of the present invention are within the scope of protection of the present invention.
Claims
1. A hydraulic cylinder with a double buffer device, characterized in that: It includes a cylinder barrel, a cylinder head that matches the cylinder barrel is provided at the front end of the cylinder barrel, a cylinder cover that matches the cylinder barrel is provided at the rear end of the cylinder barrel, a piston rod passes through the cylinder head, the rear end of the piston rod is provided in the cylinder barrel, a piston is provided at the rear end of the piston rod, a first buffer device is provided on the piston rod on the front side of the piston, and a second buffer device is provided on the piston rod on the rear side of the piston.
2. A hydraulic cylinder with a double buffer device according to claim 1, characterized in that: A large oil cylinder chamber is provided in the cylinder barrel, a first small oil cylinder chamber connected to the large oil cylinder chamber is provided in the middle of the cylinder head, and a second small oil cylinder chamber connected to the large oil cylinder chamber is provided in the middle of the front end surface of the cylinder cover.
3. The hydraulic cylinder with a double buffer device according to claim 2, characterized in that: The front end of the cylinder head is connected with a flange plate.
4. The hydraulic cylinder with a double buffer device according to claim 3, characterized in that: A first guide sleeve mounting hole is provided in the middle of the flange plate, and a guide sleeve is provided on the first guide sleeve mounting hole.
5. The hydraulic cylinder with a double buffer device according to claim 4, characterized in that: A second guide sleeve mounting hole communicating with the first small oil cylinder chamber is provided on the front end surface of the cylinder head, the rear end of the guide sleeve is embedded in the second guide sleeve mounting hole, a circular groove communicating with the first guide sleeve mounting hole is provided on the rear end surface of the flange plate, and a convex ring matching the circular groove is provided on the outer wall of the guide sleeve.
6. The hydraulic cylinder with a double buffer device according to claim 5, characterized in that: An oil outlet hole communicating with the first small oil cylinder chamber is provided on the outer wall of the cylinder head, and an oil inlet hole communicating with the second small oil cylinder chamber is provided on the outer wall of the cylinder cover.
7. The hydraulic cylinder with a double buffer device according to claim 1, characterized in that: The first buffer device and the second buffer device are both buffer rings.