Stroke cylinder

Abstract

The stroke air cylinder comprises an air cylinder shell, an air cylinder shaft, a front cover, a rear cover and a piston, the front cover and the rear cover are fixed to the two ends of the air cylinder shell through clamping rings, the stroke air cylinder further comprises a positioning magnetic ring, an annular groove used for installing the positioning magnetic ring is formed in the air cylinder shaft, and an inclined groove inclining backwards is formed in the front side of the annular groove. The rear side of the piston is provided with an annular inclined step right clamped into the inclined groove, and the front side of the piston is provided with a positioning groove clamped with the positioning magnetic ring. The positioning magnetic ring and the annular groove and the inclined groove matched with the positioning magnetic ring are arranged on the air cylinder shaft and matched with the annular inclined step and the positioning groove on the piston, and therefore accurate positioning between the piston and the air cylinder shaft is achieved. By means of the design, the stability of connection is improved, the concentricity of the piston moving in the air cylinder is guaranteed, and therefore the reliability and efficiency of working of the air cylinder are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinders, in particular to a stroke cylinder. Background Art

[0002] In existing pneumatic control systems, cylinders are widely used as important actuators. The main components of a cylinder include the cylinder housing, cylinder shaft, front cover, rear cover, and piston. In traditional cylinder designs, the front and rear covers are typically secured to the ends of the cylinder housing using retaining rings or other means, forming a closed working space. The piston resides within this space and, driven by the cylinder shaft, reciprocates along a track within the cylinder housing to achieve the desired mechanical action.

[0003] Currently, the main methods of connecting the cylinder shaft and piston are riveting or snap ring connections. While these two connection methods can meet basic requirements, they have certain limitations in practical applications. For example, riveting is complex during assembly and disassembly, and once riveted, it is difficult to adjust the piston position. While snap ring connections are relatively simple, they are prone to wear over time, causing the connection to loosen and affecting the proper functioning of the cylinder.

[0004] More importantly, whether using riveting or snap ring connections, due to machining precision and assembly errors, the installed piston and cylinder shaft often suffer from insufficient concentricity and inaccurate positioning. These issues not only affect the operating stability of the cylinder but can also cause the piston to deflect during reciprocating motion, thereby affecting the performance of the entire system.

[0005] Therefore, how to improve the convenience and accuracy of the connection between the cylinder shaft and the piston and ensure good concentricity between the two has become one of the technical problems that need to be solved urgently. To solve the above problems, the present invention proposes a new connection structure between the cylinder shaft and the piston, aiming to provide a solution that can provide a stable connection and effectively ensure the concentricity of the piston and the cylinder shaft. Utility Model Content

[0006] In view of the deficiencies in the background technology, the utility model provides a stroke cylinder.

[0007] The technical solution adopted by the utility model is: a stroke cylinder, including a cylinder housing, a cylinder shaft, a front cover, a rear cover and a piston, the front cover and the rear cover are fixed to the two ends of the cylinder housing by a retaining ring, and also includes a positioning magnetic ring, the cylinder shaft is provided with an annular groove for installing the positioning magnetic ring, the front side of the annular groove is provided with a rearward inclined groove, the rear side of the piston is provided with an annular inclined step that is just inserted into the above-mentioned inclined groove, and the front side of the piston is provided with a positioning groove that engages with the positioning magnetic ring.

[0008] Furthermore, the annular inclined step is composed of a right-angle step portion and an inclined step portion, and the inclination of the inclined step is 35-50°.

[0009] Furthermore, the vertical right-angled side of the right-angled step portion is perpendicular to the axis of the cylinder shaft, and the horizontal right-angled side of the right-angled step portion is parallel to the axis of the cylinder shaft.

[0010] Furthermore, sealing grooves are provided on the outer ring of the piston and on the cylinder shaft inside the piston, and sealing rings are provided in the sealing grooves.

[0011] Furthermore, the front cover and the rear cover are provided with a shock-absorbing groove on one side surface of the piston, and a shock-absorbing pad is installed in the shock-absorbing groove, and the shock-absorbing pad at least partially protrudes from the surface of the front cover and the rear cover.

[0012] Furthermore, the shock-absorbing groove is a "T"-shaped structure.

[0013] Furthermore, convex tooth rings are provided on the upper and lower side walls of the shock-absorbing groove, and the shock-absorbing pad is provided with tooth grooves that are interlocked with the convex tooth rings.

[0014] Furthermore, the convex tooth ring is at least two.

[0015] The beneficial effects of the utility model are:

[0016] 1. Improved connection stability: The mutual limiting engagement between the positioning magnetic ring and the positioning groove makes the connection between the piston and cylinder shaft more secure and stable. Even under long-term operation and frequent movement, the connection can be maintained in a good state, reducing the failure rate caused by loose connection.

[0017] 2. Ensures the concentricity of the piston and cylinder shaft: The cooperation between the annular inclined step and the inclined groove can effectively correct and maintain the concentricity of the piston and cylinder shaft. This not only improves the overall working efficiency of the cylinder, but also extends the service life of the equipment and reduces maintenance costs.

[0018] 3. Simplified assembly process: Compared with the traditional riveting method, the connection method of this application is more convenient and quick during the assembly process, and can be completed without complicated tools. At the same time, it also facilitates subsequent maintenance and repair work, greatly saving manpower and material resources.

[0019] 4. Enhanced sealing performance: Due to the use of specially designed inclined grooves and annular inclined steps, the connection area between the piston and the cylinder shaft is extended, making the connection between the piston and the cylinder shaft tighter, effectively avoiding leakage problems caused by loose connections, thereby ensuring the continuity and reliability of the cylinder operation.

[0020] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the present utility model.

[0022] Figure 2 It is a cross-sectional schematic diagram of the present utility model.

[0023] Figure 3 Schematic diagram of the cylinder shaft.

[0024] Figure 4 Schematic diagram of the piston structure.

[0025] Figure 5 for Figure 2 Enlarged schematic diagram of point A in the middle.

[0026] Figure 1-5 Middle: 1. Cylinder housing; 2. Cylinder shaft; 3. Front cover; 4. Rear cover; 5. Piston; 6. Snap ring; 7. Positioning magnetic ring; 8. Annular groove; 9. Inclined groove; 10. Annular inclined step; 11. Positioning groove; 12. Right-angle step portion; 13. Inclined step portion; 14. Shock-absorbing groove; 15. Shock-absorbing pad; 16. Protruding tooth ring; 17. Tooth groove; 18. Sealing groove; 19. Sealing ring. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] The utility model provides a stroke cylinder.

[0030] In this embodiment, referring to Figure 1-5The stroke cylinder includes a cylinder housing 1, a cylinder shaft 2, a front cover 3, a rear cover 4 and a piston 5. The front cover 3 and the rear cover 4 are fixed to the two ends of the cylinder housing by a retaining ring 6. It also includes a positioning magnetic ring 7. The cylinder shaft is provided with an annular groove 8 for installing the positioning magnetic ring 7. The front side of the annular groove 8 is provided with a backward inclined groove 9. The rear side of the piston is provided with an annular inclined step 10 that is just inserted into the above-mentioned inclined groove. The front side of the piston is provided with a positioning groove 11 that engages with the positioning magnetic ring.

[0031] In this technical solution, a positioning magnetic ring and its associated annular and beveled grooves on the cylinder shaft, combined with the annular beveled steps and positioning grooves on the piston, achieve precise positioning between the piston and cylinder shaft. This design not only improves connection stability but also ensures concentricity of the piston within the cylinder, thereby enhancing the reliability and efficiency of the cylinder.

[0032] Specifically, the annular inclined step is composed of a right-angle step part 12 and an inclined step part 13, and the inclination of the inclined step is 35-50°; the vertical right-angle side of the right-angle step part is perpendicular to the axis of the cylinder shaft, and the horizontal right-angle side of the right-angle step part is parallel to the axis of the cylinder shaft.

[0033] In the above technical solution, the precise setting of the right-angle step portion ensures the vertical and parallel relationship between the piston and the cylinder axis, making the connection of the piston inserted into the inclined groove more stable and facilitating the insertion and installation of the piston.

[0034] Specifically, a sealing groove 18 is provided on the outer ring of the piston and on the cylinder shaft inside the piston, and a sealing ring 19 is provided in the sealing groove.

[0035] Sealing grooves on the piston outer ring and on the cylinder shaft inside the piston, with sealing rings installed in the grooves, can effectively prevent gas or liquid leakage in and out of the cylinder and maintain stable pressure inside the cylinder. This is crucial to ensure the normal operation of the cylinder and improve energy utilization efficiency.

[0036] Specifically, the front cover and the rear cover are provided with a shock-absorbing groove 14 on one side of the piston, and a shock-absorbing pad 15 is installed in the shock-absorbing groove. The shock-absorbing pad at least partially protrudes from the surface of the front cover and the rear cover.

[0037] The design of the shock-absorbing groove and shock-absorbing pad can absorb the impact force generated by the piston moving in the cylinder, reducing the vibration and noise during cylinder operation and improving the working environment. In addition, the protruding setting of the shock-absorbing pad increases the contact area and improves the shock absorption effect.

[0038] Specifically, the shock-absorbing groove is a "T"-shaped structure.

[0039] The T-shaped shock-absorbing groove design enables the shock-absorbing pad to be more firmly installed on the front cover and rear cover, avoiding the shock-absorbing pad from falling off or shifting during the operation of the cylinder, and enhancing the stability of the shock-absorbing device.

[0040] Specifically, convex tooth rings 16 are provided on the upper and lower side walls of the shock-absorbing groove, and the shock-absorbing pad is provided with tooth grooves 17 that engage with the convex tooth rings. There are at least two convex tooth rings.

[0041] The convex tooth rings arranged on the upper and lower sides of the shock-absorbing groove are engaged with the tooth grooves on the shock-absorbing pad, which not only enhances the fixing effect of the shock-absorbing pad, but also further disperses and absorbs the impact force through the interaction between the tooth rings and the tooth grooves, thereby improving the shock absorption effect.

[0042] Technical personnel please note: Although the utility model has been described according to the above specific implementation methods, the concept of the utility model is not limited to this utility model. Any modification using the concept of the utility model will be included in the scope of protection of this patent right.

Claims

1. A stroke cylinder, comprising a cylinder housing, a cylinder shaft, a front cover, a rear cover, and a piston, wherein the front cover and the rear cover are fixed to both ends of the cylinder housing by a snap ring, characterized in that: It also includes a positioning magnetic ring, and the cylinder shaft is provided with an annular groove for installing the positioning magnetic ring, the front side of the annular groove is provided with a backward inclined groove, the rear side of the piston is provided with an annular inclined step that is just inserted into the above-mentioned inclined groove, and the front side of the piston is provided with a positioning groove that engages with the positioning magnetic ring.

2. The stroke cylinder according to claim 1, characterized in that: The annular inclined step consists of a right-angle step portion and an inclined step portion, and the inclination of the inclined step is 35-50°.

3. The stroke cylinder according to claim 2, characterized in that: The vertical right-angle side of the right-angle step portion is perpendicular to the axis center line of the cylinder shaft, and the horizontal right-angle side of the right-angle step portion is parallel to the axis center line of the cylinder shaft.

4. The stroke cylinder according to claim 1, characterized in that: Sealing grooves are provided on the outer ring of the piston and on the cylinder shaft inside the piston, and sealing rings are provided in the sealing grooves.

5. The stroke cylinder according to claim 1, characterized in that: The front cover and the rear cover are provided with a shock-absorbing groove on one side of the piston, and a shock-absorbing pad is installed in the shock-absorbing groove. The shock-absorbing pad at least partially protrudes from the surface of the front cover and the rear cover.

6. The stroke cylinder according to claim 5, characterized in that: The shock-absorbing groove is a "T"-shaped structure.

7. The stroke cylinder according to claim 5, characterized in that: Convex tooth rings are provided on the upper and lower side walls of the shock-absorbing groove, and the shock-absorbing pad is provided with tooth grooves that are interlocked with the above-mentioned convex tooth rings.

8. The stroke cylinder according to claim 7, characterized in that: The convex tooth ring has at least two rows.

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