Hydraulic oil cylinder with positioning assembly
By setting screw limit sleeves and nut limit sleeves on the hydraulic cylinder, the circumferential limit of the screw and nut is achieved, which solves the problem of loosening of the hydraulic cylinder threads under temperature difference environment and ensures the stability and reliability of positioning.
Patent Information
- Application Number
- CN202520259830.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-02-18
AI Technical Summary
In existing hydraulic cylinders, the threads of the gaskets loosen due to thermal expansion and contraction under temperature differences, affecting positioning stability.
The design employs a screw limiting sleeve and a nut limiting sleeve. Through the cooperation of the hexagonal annular plate with the screw and nut, circumferential limiting is achieved to prevent the screw and nut from rotating relative to each other and avoid loosening.
It effectively prevents threads from loosening under the effect of thermal expansion and contraction, ensures the stability and reliability of hydraulic cylinder positioning, and avoids thread deformation or anti-loosening failure.
Smart Images
Figure CN223938383U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a hydraulic cylinder with a positioning component. Background Technology
[0002] Hydraulic cylinders are an important component of hydraulic tappet mechanisms, which have wide applications in the mechanical field. During the use of hydraulic tappet mechanisms, the hydraulic cylinders must be positioned.
[0003] In existing technology, the positioning of hydraulic cylinders is usually achieved by fitting positioning bases and positioning end caps onto both ends of the hydraulic cylinder. Both the positioning bases and end caps have pre-drilled through holes. A screw is inserted into the through hole and a nut is tightened to fix the positioning base, end cap, and hydraulic cylinder. Simultaneously, positioning screw holes are pre-drilled on the sides of both the positioning base and end cap. When the hydraulic cylinder needs to be positioned on a piece of machinery, a positioning seat is pre-drilled on that machinery. A positioning through hole is pre-drilled on the positioning seat at the position corresponding to the positioning screw hole. A screw is passed through the positioning through hole and screwed into the positioning screw hole to complete the positioning of the hydraulic cylinder. Furthermore, when installing the positioning base and end cap onto the hydraulic cylinder using a screw and nut, a washer is usually fitted onto the screw. When the nut is tightened, the nut exerts a large clamping force on the washer, and the washer exerts a reaction force of the same magnitude on the nut. This reaction force compresses the threads on the bolt and nut, thereby increasing the friction between the threads and preventing loosening. This thread-locking method is simple in structure and inexpensive.
[0004] However, in existing technologies for preventing thread loosening, when the hydraulic cylinder operates in an environment with large temperature differences, the gasket will deform significantly due to the thermal expansion and contraction effect. This causes the degree of compression of the gasket to vary considerably with temperature changes. When the temperature is too high, the gasket expands and is compressed more, increasing the reaction force of the gasket on the nut, which can easily lead to thread deformation under excessive pressure. When the temperature is too low, the gasket thickness decreases and the degree of compression decreases, reducing or even eliminating the reaction force of the gasket on the nut, which can easily lead to thread loosening. Utility Model Content
[0005] The purpose of this invention is to provide a hydraulic cylinder with a positioning component to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic cylinder with a positioning component, comprising: a hydraulic cylinder, a positioning base and a positioning end cap fitted on the surface of the hydraulic cylinder, both the positioning base and the positioning end cap having through holes, a screw being movably inserted into the through holes, a washer fitted on the shaft of the screw, a nut being rotatably connected to the shaft of the screw, positioning screw holes being provided on both the positioning base and the positioning end cap, a screw limiting sleeve being fixed on the surface of the positioning base, a nut of the screw being movably inserted into the screw limiting sleeve, a nut limiting sleeve mounting groove being provided on the surface of the positioning end cap, a nut limiting sleeve being movably inserted into the nut limiting sleeve mounting groove, and the nut limiting sleeve being movably fitted onto the surface of the nut.
[0007] Preferably, both the screw limiting sleeve and the nut limiting sleeve are hexagonal annular plates, with the inner ring of the screw limiting sleeve engaging with the nut of the screw, and the inner ring of the nut limiting sleeve engaging with the nut.
[0008] Preferably, a button groove is formed on the surface of the positioning end cover. The button groove has a rectangular groove structure, and a button is movably inserted into the button groove.
[0009] Preferably, the positioning end cover has a lever hole inside, one end of which is connected to the nut limiting sleeve mounting groove, and the other end of which is connected to the button groove. A lever is slidably connected in the lever hole.
[0010] Preferably, the lever has a rectangular rod structure, with one end fixed to the rod of the button and the other end fixed to the outer ring of the nut limiting sleeve.
[0011] Preferably, the button has a rectangular rod structure, with a spring fixed to one end of the button that extends into the button slot, and the other end of the spring fixed to the inner wall of the button slot.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] The hydraulic cylinder with positioning components proposed in this utility model has a screw limiting sleeve fixed on the surface of the positioning base, which circumferentially limits the screw. A nut limiting sleeve mounting groove is opened on the surface of the positioning end cover, and a nut limiting sleeve is movably inserted into the nut limiting sleeve mounting groove, which circumferentially limits the nut. When both the screw and nut are circumferentially limited, they cannot rotate relative to each other, and therefore will not loosen. This achieves the thread anti-loosening function of the screw and nut. At the same time, the thread anti-loosening method of this utility model will not cause thread deformation or anti-loosening failure due to thermal expansion and contraction. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the positioning end cap structure;
[0016] Figure 3 This is a schematic cross-sectional view of the present invention.
[0017] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle.
[0018] In the diagram: 1. Hydraulic cylinder; 2. Positioning base; 3. Positioning end cover; 4. Screw; 5. Nut; 6. Screw limit sleeve; 7. Washer; 8. Nut limit sleeve mounting groove; 9. Toggle hole; 10. Nut limit sleeve; 11. Toggle rod; 12. Button groove; 13. Button; 14. Spring. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0020] Example 1: Please refer to Figures 1 to 4 This utility model provides a technical solution: a hydraulic cylinder with a positioning component, comprising: a hydraulic cylinder 1, a positioning base 2 and a positioning end cap 3 fitted on the surface of the hydraulic cylinder 1, both the positioning base 2 and the positioning end cap 3 having through holes, a screw 4 movably inserted into the through holes, a washer 7 fitted on the rod of the screw 4, a nut 5 rotatably connected to the rod of the screw 4, and positioning screw holes provided on both the positioning base 2 and the positioning end cap 3. A screw limiting sleeve 6 is fixed on the top, and the nut of the screw 4 is movably inserted into the screw limiting sleeve 6. A nut limiting sleeve mounting groove 8 is opened on the surface of the positioning end cover 3. A nut limiting sleeve 10 is movably inserted into the nut limiting sleeve mounting groove 8. The nut limiting sleeve 10 is movably sleeved on the surface of the nut 5. Both the screw limiting sleeve 6 and the nut limiting sleeve 10 are hexagonal annular plates. The inner ring of the screw limiting sleeve 6 cooperates with the nut of the screw 4, and the inner ring of the nut limiting sleeve 10 cooperates with the nut 5.
[0021] In actual use, the hydraulic cylinder with positioning components has positioning bases 2 and positioning end caps 3 fitted onto both ends of the hydraulic cylinder 1. Positioning bases 2 and positioning end caps 3 are installed onto the hydraulic cylinder 1 using screws 4 and nuts 5. The positioning screw holes on the positioning bases 2 and positioning end caps 3 engage with the positioning through holes on the positioning seats of the mechanical equipment. Positioning of the hydraulic cylinder 1 is achieved by screwing a screw through the positioning through hole into the positioning screw hole. To prevent loosening of the threads between the screw 4 and nut 5, a screw limiting sleeve 6 is fixed to the surface of the positioning base 2. When the screw 4 is inserted into the through hole on the surface of the positioning base 2 and positioning end cap 3, the nut of the screw 4 is inserted into the screw limiting sleeve 6. Because the screw 4 and the nut of the screw limiting sleeve 6 engage, the screw limiting sleeve 6 circumferentially limits the screw 4. In addition, a nut limiting sleeve mounting groove 8 is opened on the surface of the positioning end cover 3. A nut limiting sleeve 10 is movably inserted into the nut limiting sleeve mounting groove 8. When the nut 5 is tightened, the nut limiting sleeve 10 is completely retracted into the nut limiting sleeve mounting groove 8. After the nut 5 is tightened, one end of the nut limiting sleeve 10 extends from the nut limiting sleeve mounting groove 8 and is fitted onto the surface of the nut 5. The other end of the nut limiting sleeve 10 remains in the nut limiting sleeve mounting groove 8, thereby achieving circumferential limiting of the nut 5 by the nut limiting sleeve 10. When both the screw 4 and the nut 5 are circumferentially limited, the screw 4 and the nut 5 cannot rotate relative to each other and will not loosen. This achieves the thread anti-loosening function of the screw 4 and the nut 5. At the same time, the various components of this utility model that prevent thread loosening of the screw 4 and the nut 5 will not cause thread deformation or anti-loosening failure due to thermal expansion and contraction.
[0022] Example 2: Based on Example 1, in order to control the extension and retraction of the nut limiting sleeve 10, a button groove 12 is provided on the surface of the positioning end cover 3. The button groove 12 has a rectangular groove structure, and a button 13 is movably inserted into the button groove 12. A lever hole 9 is provided inside the positioning end cover 3. One end of the lever hole 9 is connected to the nut limiting sleeve mounting groove 8, and the other end of the lever hole 9 is connected to the button groove 12. A lever 11 is slidably connected in the lever hole 9. The lever 11 has a rectangular rod structure. One end of the lever 11 is fixed to the rod of the button 13, and the other end of the lever 11 is fixed to the outer ring of the nut limiting sleeve 10. The button 13 has a rectangular rod structure. A spring 14 is fixed to one end of the button 13 that extends into the button groove 12, and the other end of the spring 14 is fixed to the inner wall of the button groove 12.
[0023] When the nut limiting sleeve 10 needs to be fully retracted into the nut limiting sleeve mounting groove 8, the button 13 is fully pressed into the button groove 12. The button groove 12 drives the lever 11 to slide in the lever hole 9. The lever 11 then drives the nut limiting sleeve 10 and the button 13 to move in the same direction, so that the nut limiting sleeve 10 is fully retracted into the nut limiting sleeve mounting groove 8. At this time, the spring 14 is compressed. When one end of the nut limiting sleeve 10 needs to extend out of the nut limiting sleeve mounting groove 8, simply release the button 13. The spring 14, under its own elasticity, generates a pushing force on the button 13, thereby pushing one end of the button 13 out of the button groove 12. The movement of the button 13 again drives the nut limiting sleeve 10 to move in the same direction through the lever 11, so that one end of the nut limiting sleeve 10 extends out of the nut limiting sleeve mounting groove 8.
[0024] Example 3: Based on Example 2, in order to achieve the inner ring engagement between the nut 5 and the nut limiting sleeve 10, a washer 7 is fitted on the rod body of the screw 4.
[0025] After tightening nut 5, because washer 7 has great elasticity, nut 5 can continue to be rotated in the tightening direction to ensure that nut 5 is aligned with the inner ring of nut retaining sleeve 10. In this way, after one end of nut retaining sleeve 10 protrudes from nut retaining sleeve mounting groove 8, it can be ensured that nut 5 and nut retaining sleeve 10 are engaged. At the same time, since this solution does not rely on the compression of washer 7 to achieve the anti-loosening of screw 4 and nut 5, but only provides fine adjustment redundancy for nut 5 after it is tightened, washer 7 will not be subjected to too much compression force, and therefore will not generate too much reaction force on nut 5, thus preventing deformation of the threads between screw 4 and nut 5.
[0026] In actual use, the hydraulic cylinder with positioning components has positioning bases 2 and positioning end caps 3 fitted onto both ends of the hydraulic cylinder 1. Positioning bases 2 and positioning end caps 3 are installed onto the hydraulic cylinder 1 using screws 4 and nuts 5. The positioning screw holes on the positioning bases 2 and positioning end caps 3 engage with the positioning through holes on the positioning seats of the mechanical equipment. Positioning of the hydraulic cylinder 1 is achieved by screwing a screw through the positioning through hole into the positioning screw hole. To prevent loosening of the threads between the screw 4 and nut 5, a screw limit sleeve 6 is fixed to the surface of the positioning base 2. When the screw 4 is inserted into the positioning... After the through holes are made on the surfaces of the base 2 and the positioning end cover 3, the nut of the screw 4 is inserted into the screw limiting sleeve 6. Because the screw 4 and the nut of the screw limiting sleeve 6 cooperate, the screw limiting sleeve 6 circumferentially limits the screw 4. Furthermore, a nut limiting sleeve mounting groove 8 is opened on the surface of the positioning end cover 3. A nut limiting sleeve 10 is movably inserted into the nut limiting sleeve mounting groove 8. When the nut 5 is tightened, the nut limiting sleeve 10 is completely retracted into the nut limiting sleeve mounting groove 8. After the nut 5 is tightened, one end of the nut limiting sleeve 10 extends from the nut limiting sleeve mounting groove 8 and is fitted onto the surface of the nut 5. The other end of the nut limiting sleeve 10... One end remains in the nut limiting sleeve mounting groove 8, thereby enabling the nut limiting sleeve 10 to circumferentially limit the nut 5; when both the screw 4 and the nut 5 are circumferentially limited, the screw 4 and the nut 5 cannot rotate relative to each other, and therefore will not loosen, thus achieving the thread anti-loosening function of the screw 4 and the nut 5. At the same time, the various components of this utility model that prevent thread loosening of the screw 4 and the nut 5 will not cause thread deformation or anti-loosening failure due to thermal expansion and contraction; when the nut limiting sleeve 10 needs to be fully retracted into the nut limiting sleeve mounting groove 8, the button 13 is fully pressed into the button groove 12, and the button groove 12 drives the lever 11 to... Sliding in the lever hole 9, the lever 11 drives the nut limiting sleeve 10 and the button 13 to move in the same direction, so that the nut limiting sleeve 10 is completely retracted into the nut limiting sleeve mounting groove 8, at which time the spring 14 is compressed; when it is necessary for one end of the nut limiting sleeve 10 to extend out of the nut limiting sleeve mounting groove 8, simply release the button 13, and the spring 14 will push the button 13 under its own elasticity, thereby pushing one end of the button 13 out of the button groove 12. The movement of the button 13 again drives the nut limiting sleeve 10 to move in the same direction through the lever 11, so that one end of the nut limiting sleeve 10 extends out of the nut limiting sleeve mounting groove 8;After tightening nut 5, because washer 7 has significant elasticity, nut 5 can continue to rotate in the tightening direction to ensure that nut 5 is aligned with the inner ring of nut retaining sleeve 10. This ensures that nut 5 and nut retaining sleeve 10 are properly engaged after one end of nut retaining sleeve 10 extends from nut retaining sleeve mounting groove 8. Furthermore, since this design does not rely on the compression of washer 7 to prevent loosening of screw 4 and nut 5, but only provides fine-tuning redundancy for nut 5 after tightening, washer 7 will not be subjected to excessive compression force, thus not generating significant reaction force on nut 5, and consequently preventing deformation of the threads between screw 4 and nut 5.
[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A hydraulic cylinder with a positioning component, comprising: A hydraulic cylinder (1) is provided with a positioning base (2) and a positioning end cap (3) on its surface. Both the positioning base (2) and the positioning end cap (3) have through holes. A screw (4) is movably inserted into the through holes. A washer (7) is fitted on the body of the screw (4). A nut (5) is rotatably connected to the body of the screw (4). Positioning screw holes are provided on both the positioning base (2) and the positioning end cap (3). The feature is that a screw limiting sleeve (6) is fixed on the surface of the positioning base (2). The nut of the screw (4) is movably inserted into the screw limiting sleeve (6). A nut limiting sleeve mounting groove (8) is provided on the surface of the positioning end cap (3). A nut limiting sleeve (10) is movably inserted into the nut limiting sleeve mounting groove (8). The nut limiting sleeve (10) is movably fitted on the surface of the nut (5).
2. A hydraulic cylinder with a positioning component according to claim 1, characterized in that: Both the screw limiting sleeve (6) and the nut limiting sleeve (10) are hexagonal ring plates. The inner ring of the screw limiting sleeve (6) is matched with the nut of the screw (4), and the inner ring of the nut limiting sleeve (10) is matched with the nut (5).
3. A hydraulic cylinder with a positioning component according to claim 1, characterized in that: The positioning end cap (3) has a button groove (12) on its surface. The button groove (12) has a rectangular groove structure and a button (13) is movably inserted into the button groove (12).
4. A hydraulic cylinder with a positioning component according to claim 3, characterized in that: The positioning end cover (3) has a lever hole (9) inside. One end of the lever hole (9) is connected to the nut limit sleeve mounting groove (8), and the other end of the lever hole (9) is connected to the button groove (12). A lever (11) is slidably connected in the lever hole (9).
5. A hydraulic cylinder with a positioning component according to claim 4, characterized in that: The lever (11) has a rectangular rod structure. One end of the lever (11) is fixed to the rod of the button (13), and the other end of the lever (11) is fixed to the outer ring of the nut limiting sleeve (10).
6. A hydraulic cylinder with a positioning component according to claim 5, characterized in that: The button (13) has a rectangular rod structure. One end of the button (13) that extends into the button groove (12) is fixed with a spring (14), and the other end of the spring (14) is fixed to the inner wall of the button groove (12).