High-stability oil cylinder
By designing a connecting ramp and tapered interface for the piston in the hydraulic cylinder, combined with the embedded fit of the baffle and limiting protrusion, the problem of piston loosening is solved, and a hydraulic cylinder design with high stability and sealing is achieved.
Patent Information
- Application Number
- CN202520090269.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-01-14
AI Technical Summary
In traditional hydraulic cylinders, the piston is connected by bolts, which is prone to loosening, leading to increased friction, wear, and unstable motion accuracy.
The design incorporates a beveled connection between the piston's pressing and contacting parts, the contact between the rod's tapered interface and the nut's tapered interface, and the embedded fit of the baffle and limiting protrusion, along with the secondary tightening of the nut, enhancing the connection stability between the piston and piston rod.
It improves the connection stability between the piston and piston rod, prevents loosening, extends the service life of the hydraulic cylinder, and ensures sealing performance under high pressure.
Smart Images
Figure CN223578372U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of oil cylinder manufacturing, especially a high-stability oil cylinder. BACKGROUND
[0002] As a key component in hydraulic transmission system, oil cylinder is widely used in various mechanical equipment. The traditional piston fixing method mainly relies on bolt connection, which has some inherent limitations. Because the contact area of bolt connection is relatively small, the piston is prone to left-right horizontal movement when subjected to working pressure. This horizontal movement not only increases the friction between the piston and the cylinder, accelerates wear, but also affects the movement accuracy and stability of the piston. SUMMARY
[0003] The utility model discloses a high-stability oil cylinder which is not easy to loosen and has high sealing performance.
[0004] The utility model discloses a high-stability oil cylinder, which comprises a cylinder body, a piston rod and a piston. The piston is pressed by a nut. The piston comprises a pressing part and a contact part. A connecting slope is arranged between the pressing part and the contact part. The piston rod comprises a rod body and a reduced diameter. A through channel is arranged in the center of the contact part. The through channel is connected with the reduced diameter. The outside of the contact part is pressed by the nut. The outer periphery of the junction of the rod body and the reduced diameter is a tapered interface of the rod body. The inner side of the nut is a tapered interface of the nut. The tapered interface of the rod body and the inner side connecting slope, and the tapered interface of the nut and the outer side connecting slope are in contact. A baffle is arranged on the outer periphery of the tapered interface of the rod body and the tapered interface of the nut. The baffle is in contact with the contact part on both sides.
[0005] Preferably, a plurality of grooves are arranged in the middle of the reduced diameter. Limiting protrusions are arranged in the through channel in the center of the contact part. The limiting protrusions are embedded in the grooves.
[0006] Preferably, a protruding ring is arranged on the outer edge of the baffle. The protruding ring is embedded in the contact part of the piston.
[0007] Preferably, after the nut presses the piston, the reduced diameter is exposed outside the nut. The nut is pressed again by a limiting nut.
[0008] Preferably, the inner side of the tapered interface of the rod body, the tapered interface of the nut and the baffle are covered with a rubber layer.
[0009] Compared with the prior art, the utility model has the advantages of:
[0010] 1. By designing the connecting slope between the piston's pressing part and the contact part, as well as the contact between the rod's tapered interface and the nut's tapered interface, the stability of the structure is increased, making the piston and piston rod less prone to loosening or deformation under high pressure, thereby improving the overall stability of the hydraulic cylinder.
[0011] 2. The through channel in the center of the contact part is connected to the narrowed diameter and tightened by rotating the nut. In addition, multiple sets of grooves are provided in the middle of the narrowed diameter, and a limiting protrusion is provided inside the through channel in the center of the contact part. The limiting protrusion and the groove are embedded and matched, which further enhances the reliability of the connection.
[0012] 3. The contact between the baffle and the two sides of the contact part, as well as the secondary tightening of the nut by the limit nut, effectively prevent the piston and piston rod from loosening during long-term use, thus extending the service life of the hydraulic cylinder. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model.
[0014] The components include: 1. Cylinder body; 2. Piston rod; 201. Rod body; 2011. Rod body tapered interface; 202. Reduced diameter; 2021. Groove; 3. Piston; 301. Pressing part; 302. Abutting part; 3021. Limiting protrusion; 303. Connecting inclined surface; 4. Nut; 401. Nut tapered interface; 5. Baffle; 501. Protrusion ring; 6. Limiting nut. Detailed Implementation
[0015] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.
[0016] It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0017] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term '' set '', '' install '', '' connect '', '' connection '' should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can through intermediate medium indirectly connect, can be two element inside intercommunication. For ordinary skilled person in the art, can understand the specific meaning of above-mentioned term in the utility model with specific circumstances.
[0018] As Figure 1 Indicated, a kind of high stability oil cylinder, including cylinder body 1, piston rod 2, piston 3;Piston 3 is pressed by nut 4, piston 3 is composed of pressing part 301 and abutting portion 302, connecting slope 303 is equipped between pressing part 301 and abutting portion 302;Piston rod 2 is composed of stem 201 and reduced diameter 202, the through channel is equipped in the center of abutting portion 302, the through channel is connected with reduced diameter 202, abutting portion 302 outside is pressed by rotating nut 4;The outer periphery of the junction of stem 201 and reduced diameter 202 is set as stem taper interface 2011, the inside opening of nut 4 is set as nut taper interface 401, stem taper interface 2011 and inside connecting slope 303, nut taper interface 401 and outside connecting slope 303 abut, the design of taper interface increases contact area, improves the stability of connection, simultaneously, it is convenient to adjust and press, ensure the sealing performance under high pressure;The periphery of stem taper interface 2011 and nut taper interface 401 is equipped with baffle 5, baffle 5 and the both sides of abutting portion 302 abut, baffle increases the contact area with the side of piston, improves the side of piston.
[0019] Reduced diameter 202 middle part is equipped with multiple groups of grooves 2021, the inside of the through channel of the center of abutting portion 302 is equipped with limit protrusion 3021, limit protrusion and groove are embedded and cooperate, further enhance the connection strength between piston and piston rod, prevent the relative movement of piston under high pressure, improve the stability of whole.
[0020] The outer edge of baffle 5 is equipped with protruding ring 501, protruding ring 501 and the abutting portion 302 of piston 3 are embedded and connected, embedded and connected mode provides the connecting effect between baffle and piston, improves the stability of piston after installation.
[0021] After nut 4 presses piston, reduced diameter 202 exposes the outside of nut 4, nut 4 is pressed again by limit nut 6, additional fixing force is provided by secondary pressing design, ensure the stability of piston and piston rod under extreme conditions, prevent loosening or leakage.
[0022] The rod taper interface 2011, the nut taper interface 401 and the inner side of the baffle 5 are all covered with a rubber layer (not shown in the figure), which is used to improve the sealing performance and avoid leakage.
[0023] The working principle of the utility model is described as follows: the piston rod is closely connected with the piston, and the movement of the piston drives the piston rod to move together. In addition, the high-stability oil cylinder also adopts special locking mechanisms, such as a taper interface, a limiting protrusion and a baffle, which further enhance the connection strength between the piston and the piston rod and improve the overall stability and reliability.
[0024] The above-described embodiments are merely preferred embodiments of the utility model, and do not limit the concept and scope of the utility model. Without departing from the design concept of the utility model, various modifications and improvements to the technical solution of the utility model made by those skilled in the art shall fall within the protection scope of the utility model. The technical content claimed by the utility model has been fully recorded in the claims.
Claims
1. A high-stability hydraulic cylinder, characterized in that, The device includes a cylinder body, a piston rod, and a piston. The piston is tightened by a nut and consists of a tightening part and a contacting part, with a connecting inclined surface between the tightening part and the contacting part. The piston rod consists of a rod body and a narrowing diameter. The contacting part has a through channel at its center, which is sleeved and connected to the narrowing diameter. The outer side of the contacting part is tightened by rotating a nut. The outer periphery of the junction between the rod body and the narrowing diameter is set as a rod body tapered interface, and the inner opening of the nut is set as a nut tapered interface. The rod body tapered interface abuts against the inner connecting inclined surface, and the nut tapered interface abuts against the outer connecting inclined surface. Baffles are provided around the rod body tapered interface and the nut tapered interface, and the baffles abut against both sides of the contacting part.
2. The high-stability hydraulic cylinder according to claim 1, characterized in that, The narrowed diameter has multiple sets of grooves in the middle, and the through channel in the center of the contact part has a limiting protrusion inside, which is embedded and engaged with the groove.
3. A high-stability hydraulic cylinder according to claim 1, characterized in that, The outer edge of the baffle is provided with a raised ring, which is embedded and connected to the contact part of the piston.
4. A high-stability hydraulic cylinder according to claim 1, characterized in that, After the nut presses the piston, the reduced diameter protrudes outside the nut, and the nut is then pressed again by the limiting nut.
5. A high-stability hydraulic cylinder according to claim 1, characterized in that, The tapered interface of the rod body, the tapered interface of the nut, and the inner side of the baffle are all covered with a rubber layer.