Floor spring cold extrusion piston free of hole digging

Abstract

The utility model discloses a hole-digging-free floor spring cold extrusion piston, and relates to the technical field of floor springs, the hole-digging-free floor spring cold extrusion piston comprises a piston body, a rotating shaft, a piston groove and a positioning groove, the positioning groove is arranged in one end of the piston body, the positioning groove is arranged in the piston body, and one end of the top of the positioning groove penetrates through the top of the piston body. According to the technical scheme, the piston body is optimized through the structural design, and the outer circle is free of a notch; the problem that an outer circle notch is generated due to process limitation in the machining process of a traditional piston is solved; due to the design of the non-notch outer circle, the contact area is larger when the piston is matched with the cylinder diameter, the contact pressure distribution is more uniform, and therefore the friction coefficient between the piston and the cylinder diameter is obviously reduced; due to the uniform friction distribution, the abrasion of the cylinder diameter is reduced, and the service life of the floor spring is prolonged; in addition, the structural integrity of the piston is improved due to the design of the non-notch outer circle, and the pressure resistance of the piston is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of floor spring technology, specifically to a cold-extruded piston for floor springs that do not require drilling. Background Technology

[0002] In the manufacturing of floor spring pistons, the piston is a key component of the floor spring, and its performance directly affects the service life and operational stability of the floor spring.

[0003] A search revealed that Chinese patent publication number CN214578535U discloses a floor spring piston. Because this piston has a small body length and outer diameter, the size of the cam that mates with the body can be easily reduced, thus reducing the overall size of the floor spring and facilitating installation. However, the existing piston is difficult to manufacture, requiring high-precision equipment and complex operating procedures. This not only increases manufacturing costs but also limits production efficiency. Furthermore, due to limitations in the manufacturing process, the outer diameter of the machined piston often has gaps, leading to uneven friction between the piston's outer diameter and the cylinder bore. Over long-term operation, this uneven friction accelerates cylinder bore wear, thereby shortening the floor spring's lifespan.

[0004] To address these shortcomings of existing technologies, this solution provides a cold-extruded piston for floor springs that eliminates the need for drilling. By employing a cold-extruded molding structure, it not only solves the problems of high processing difficulty, low efficiency, and high cost, but also, through design improvements, eliminates gaps on the outer circumference of the piston, thereby achieving uniform friction with the cylinder bore, effectively reducing cylinder bore wear, extending product service life, and enhancing the product's market competitiveness. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a cold-extruded piston for floor springs that eliminates the need for drilling, thus solving the problem mentioned in the background art where existing pistons are difficult to process and often have gaps on the outer circumference after processing, which shortens the service life of the floor spring.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cold-extruded piston for a hole-free floor spring, comprising a piston body, a rotating shaft, a piston groove, and a positioning groove. The positioning groove is provided inside one end of the piston body and is located within the piston body. The top end of the positioning groove penetrates the top of the piston body. A rotating shaft is provided inside the positioning groove, and the bottom end of the rotating shaft is embedded in the positioning groove. A needle roller bearing is provided outside the rotating shaft and is located inside the piston groove, which is located within one end of the piston body.

[0007] Preferably, one end of the piston groove is square, the internal cross-section of the piston groove is rectangular, and the inner wall surface of the square hole is smooth. The square hole penetrates one end of the piston body and extends to the middle of the piston body. By designing the piston groove as a rectangular structure with a smooth inner wall surface, not only is the processing simplified and manufacturing costs reduced, but structural stability is also improved, reducing the possibility of stress concentration and deformation. At the same time, this design makes the fit between the piston groove and the needle roller bearing tighter and the clearance control more precise, thereby optimizing the fit accuracy, reducing the coefficient of friction, reducing wear, and extending the service life of the piston. In addition, the rectangular cross-section design also enhances the piston's pressure resistance and overall structural integrity, further improving the product's durability and service life, ultimately achieving high efficiency, stability, and low wear during piston operation.

[0008] Preferably, there is a gap between the inner wall of the piston groove and the needle roller bearing, and the outer diameter of the needle roller bearing is smaller than the inner width of the piston groove, which provides appropriate movement space for the needle roller bearing. This effectively reduces the friction between the needle roller bearing and the inner wall of the piston groove during operation, reduces energy loss and heat generation, and thus extends the service life of the needle roller bearing and the piston. At the same time, the reasonable gap setting can also ensure that the needle roller bearing moves smoothly in the piston groove, improve the running accuracy and stability of the piston, avoid jamming or wear problems caused by excessive friction, and further enhance the overall performance and reliability of the piston.

[0009] Preferably, the other end of the piston body is provided with a circular groove, and the inner wall of the groove has a threaded structure. The groove at the other end of the piston body is used to connect the piston rod. By providing a circular groove with a threaded inner wall at the other end of the piston body to connect the piston rod, the reliability and stability of the connection are enhanced. At the same time, the assembly process is simplified, the assembly difficulty and cost are reduced, and the production efficiency is improved. The tightness of the threaded connection can also effectively improve the sealing performance, reduce the risk of hydraulic oil leakage, and thus extend the service life of the floor spring.

[0010] Preferably, an annular groove is provided on the outer wall of the other end of the piston body. The annular groove on the outer wall of the piston body is used to embed the sealing ring. By providing an annular groove on the outer wall of the other end of the piston body for embedding the sealing ring, the sealing performance is significantly improved. The annular groove provides a stable installation position for the sealing ring, ensuring that the sealing ring can tightly fit the gap between the piston body and the cylinder during operation, effectively preventing hydraulic oil leakage, thereby improving the sealing reliability and working stability of the floor spring.

[0011] Preferably, the top and bottom surfaces of the needle roller bearing are provided with shims, which are fitted onto the outside of the rotating shaft. The shims can effectively reduce the direct contact between the needle roller bearing and the rotating shaft, avoid wear caused by friction, and thus extend the service life of the needle roller bearing and the rotating shaft. Secondly, the shims can play a role in buffering and shock absorption, reducing vibration and noise during operation, and improving the smoothness and accuracy of piston operation.

[0012] This invention provides a cold-extruded piston for floor springs that eliminates the need for drilling. It offers the following advantages:

[0013] (1) No-notch outer circle design: The piston body in this solution achieves no-notch outer circle through structural design optimization; it avoids the problem of outer circle notch caused by process limitations in the traditional piston during processing; the no-notch outer circle design ensures that the piston has a larger contact area and a more uniform contact pressure distribution when it is in contact with the cylinder diameter, thereby significantly reducing the friction coefficient between the piston and the cylinder diameter; this uniform friction distribution helps to reduce cylinder diameter wear and extend the service life of the floor spring; in addition, the no-notch outer circle design also improves the structural integrity of the piston and enhances its pressure resistance.

[0014] (2) Rectangular cross-section design of piston groove: The internal cross-section of the piston groove is rectangular, and the inner wall surface of the square hole is smooth. This design not only simplifies the processing of the piston groove, making the piston easier to process, but also improves the stability of its internal structure. The rectangular cross-section design makes the fit between the piston groove and the needle roller bearing tighter and the clearance control more precise, thereby improving the running accuracy and stability of the piston and further improving the durability of the piston.

[0015] These structural improvements directly address the wear problems caused by the piston outer circle notch, the cost and efficiency problems caused by processing complexity, and the problem of insufficient sealing performance mentioned in the background technology, thereby improving the overall performance and market competitiveness of the product. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a front view structural diagram of the present invention;

[0018] Figure 3 This is a schematic cross-sectional view of the present invention.

[0019] Figure 4 This is a schematic diagram of the piston body structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the rear view structure of this utility model.

[0021] In the diagram, 1 is the piston body; 2 is the shaft; 3 is the needle roller bearing; 4 is the piston groove; 5 is the positioning groove; and 6 is the gasket. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1:

[0024] Please see Figure 1-5 This utility model provides a technical solution: a cold-extruded piston for a floor spring without drilling, comprising a piston body 1, a rotating shaft 2, a piston groove 4, and a positioning groove 5. The positioning groove 5 is located inside one end of the piston body 1, with its top end penetrating the top of the piston body 1. A rotating shaft 2 is located inside the positioning groove 5, with its bottom end embedded within the positioning groove 5. A needle roller bearing 3 is located outside the rotating shaft 2, inside the piston groove 4. The piston groove 4 is located inside one end of the piston body 1. Through optimized structural design, a notch-free outer circle is achieved, avoiding the notch problem caused by process limitations in traditional piston manufacturing. The notch-free outer circle design ensures a larger contact area and more uniform contact pressure distribution when the piston mates with the cylinder bore, significantly reducing the friction coefficient between the piston and the cylinder bore. This uniform friction distribution helps reduce cylinder bore wear and extends the service life of the floor spring. Furthermore, the notch-free outer circle design improves the structural integrity of the piston and enhances its pressure resistance.

[0025] Example 2:

[0026] This utility model provides a technical solution: a cold-extruded piston for a floor spring without drilling. One end of the piston groove 4 is square-shaped, and the internal cross-section of the piston groove 4 is rectangular. The inner wall surface of the square hole is smooth. The square hole penetrates one end of the piston body 1 and extends to the middle of the piston body 1. There is a gap between the inner wall of the piston groove 4 and the needle roller bearing 3. The outer diameter of the needle roller bearing 3 is smaller than the inner width of the piston groove 4. A circular groove is provided at the other end of the piston body 1, and the inner wall of the groove has a threaded structure. This groove at the other end of the piston body 1 is used to connect the piston rod. An annular groove is provided on the outer wall of the other end of the piston body 1, and this annular groove is used to embed a sealing ring. Gaskets 6 are provided on the top and bottom surfaces of the needle roller bearing 3. The gaskets 6 are fitted onto the outside of the rotating shaft 2. The internal cross-section of the piston groove 4 is rectangular, and the inner wall surface of the square hole is smooth. This design not only simplifies the processing of the piston groove 4, making the piston easier to process, but also improves the stability of its internal structure. The rectangular cross-section design makes the fit between the piston groove 4 and the needle roller bearing 3 tighter and the clearance control more precise, thereby improving the piston's running accuracy and stability, and further improving the piston's durability.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cold spring, holeless, spring-pressed piston, characterized in that: Including piston body (1), pivot (2), piston groove (4) and positioning groove (5), one end of the piston body (1) is internally provided with a positioning groove (5), the positioning groove (5) is opened in the piston body (1), one end of the positioning groove (5) penetrates the top of the piston body (1), the pivot (2) is arranged in the positioning groove (5), the pivot (2) is embedded in the positioning groove (5), the needle bearing (3) is arranged outside the pivot (2), the needle bearing (3) is arranged in the piston groove (4), the piston groove (4) is arranged in one end of the piston body (1).

2. A cold spring holeless extruded piston according to claim 1, wherein: One end of the piston groove (4) is square, the cross section of the piston groove (4) is rectangular structure, and the inner wall surface of the square hole is smooth, the square hole penetrates one end of the piston body (1) and extends to the middle of the piston body (1).

3. The cold spring holeless extruded piston of claim 1 wherein: There is a gap between the inner wall of the piston groove (4) and the needle bearing (3), and the outer diameter of the needle bearing (3) is smaller than the width of the piston groove (4).

4. The cold spring holeless extruded piston of claim 1 wherein: The other end of the piston body (1) is provided with a circular groove, and the inner wall of the groove is a threaded structure, and the other end of the piston body (1) is used for connecting the piston rod.

5. The cold spring holeless extruded piston of claim 1 wherein: The outer wall of the other end of the piston body (1) is provided with an annular groove, and the annular groove is used for embedding the sealing ring.

6. The cold spring holeless extruded piston of claim 1 wherein: The top and bottom surfaces of the needle bearing (3) are provided with gaskets (6), and the gaskets (6) are sleeved outside the pivot (2).

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