Jig suitable for sealing a ring around a shaft

Abstract

The utility model relates to the technical field of jig, disclose a jig suitable for sealing ring is nested on the shaft body, including transition shaft, one end of transition shaft has the reduced diameter section, and the diameter of reduced diameter section is less than the diameter of sealing ring, the other end of transition shaft has the expansion section, and the diameter of expansion section is greater than the diameter of shaft body, and the diameter of expansion section is greater than the diameter of sealing ring, the end of expansion section has the butt joint structure butt joint with shaft body, and the butt joint structure connects transition shaft and shaft body as a whole, and sealing ring is nested on the shaft body after being sleeved by reduced diameter section and expanding through expansion section, the diameter of expansion section is greater than shaft body and sealing ring, can guide sealing ring expansion and accurately nest on the shaft body, reduces the repeated adjustment action due to the deviation or not completely nested, improves the first success rate of assembly.

Description

Technical Field

[0001] This utility model relates to the technical field of jigs, and more specifically, to a jig suitable for a sealing ring fitted on a shaft. Background Technology

[0002] Installing a sealing ring onto a shaft is a common operation in production and assembly. It usually relies on manual installation and the experience and skills of the operators. Because the sealing ring itself is elastic, the gap between its inner diameter and the outer diameter of the shaft needs to be precisely controlled. When operating manually, the sealing ring needs to be stretched to the appropriate diameter before being installed. This can easily lead to deformation or damage due to uneven force, making it difficult to guarantee the efficiency and quality of installation.

[0003] While existing fixtures have improved automation to some extent, they are insufficient to meet the requirements for precise positioning and diameter expansion of the sealing rings, resulting in a complex fitting process and increased assembly costs. For example, they cannot simultaneously achieve smooth fitting of the sealing rings and precise installation after diameter expansion. Some fixtures can only initially fix the sealing rings but cannot guarantee the coaxiality of the sealing rings and the shaft. This can lead to eccentricity or improper installation of the sealing rings during the diameter expansion process, affecting the final sealing performance and production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a fixture suitable for fitting a sealing ring onto a shaft, thereby solving the problem of low efficiency in fitting a sealing ring onto a shaft in the prior art.

[0005] This utility model is implemented as follows: it is applicable to a fixture on which a sealing ring is sleeved on a shaft, including a transition shaft. One end of the transition shaft has a reduced diameter section, the diameter of which is smaller than the diameter of the sealing ring. The other end of the transition shaft has an expanded diameter section, the diameter of which is larger than the diameter of the shaft and the diameter of which is larger than the diameter of the sealing ring. The end of the expansion section has a docking structure that connects with the shaft body. The docking structure connects the transition shaft and the shaft body as one unit. The sealing ring is inserted by the reduction section and, after being expanded by the expansion section, is fitted onto the shaft body.

[0006] Furthermore, the transition shaft is integrally formed.

[0007] Furthermore, the transition shaft is in the shape of a straight strip.

[0008] Furthermore, along the direction from the reduced diameter section to the expanded diameter section, the diameter of the reduced diameter section gradually increases.

[0009] Furthermore, the diameter expansion section includes a variable diameter section and a constant diameter section with the same diameter. The variable diameter section is connected between the diameter reduction section and the constant diameter section. One end of the variable diameter section has a small diameter end, and the other end of the variable diameter section has a large diameter end. Along the direction from the small diameter end to the large diameter end, the diameter of the variable diameter section gradually increases. The connection structure is located at the end of the constant diameter section. The small diameter end is connected to the reduced diameter section, and the large diameter end is connected to the equal diameter section. The diameter of the equal diameter section is the same as the diameter of the large diameter end. The sealing ring is inserted into the reduced diameter section, and after passing through the reduced diameter section, the deformed section and the equal diameter section in sequence, it is fitted onto the shaft body.

[0010] Furthermore, the end of the equal diameter section forms a mating end, which is recessed downward to form a slot for the shaft to be inserted, and the slot forms the mating structure.

[0011] Furthermore, the bottom of the slot is flat, forming a bottom surface for mating with the shaft.

[0012] Furthermore, the central axis of the slot is arranged to coincide with the central axis of the transition shaft.

[0013] Furthermore, the outer periphery of the mating end has an outer peripheral sidewall, which is arranged around the circumference of the slot; along the direction from the variable diameter section to the constant diameter section, the outer peripheral sidewall is arranged inclined inward.

[0014] Furthermore, the end of the reduced diameter section is formed with an insertion end for the sealing ring to pass through. The outer periphery of the insertion end is provided with a plurality of elastically deformable spring pieces, which are arranged at intervals along the circumference of the insertion end. The lower end of the spring piece is abutted against the outer periphery of the insertion end, and the upper end of the spring piece is arranged inclined upward. Along the direction from the lower end to the upper end of the spring piece, the spring piece is arranged inclined outward away from the reduced diameter section. Multiple spring pieces and the diameter of the reduced-diameter section enclose an annularly arranged elastic region. The upper ends of the multiple spring pieces and the reduced-diameter section enclose an annular top opening. The top of the elastic region formed by the top opening has a diameter larger than that of the sealing ring.

[0015] Compared with the prior art, the fixture provided by this utility model is suitable for fitting a sealing ring onto a shaft. When fitting, the diameter of the reduced diameter section is smaller than that of the sealing ring, making it easy and effortless to fit the sealing ring in, and avoiding damage to the sealing ring caused by improper operation during manual installation. By expanding the diameter of the expansion section to be larger than that of the shaft and the sealing ring, the sealing ring can be guided to expand and be accurately fitted onto the shaft, reducing the need for repeated adjustments due to misalignment or incomplete fitting, and improving the first-time success rate of assembly. In addition, the docking structure ensures a secure connection between the transition shaft and the shaft body, making the entire assembly process smooth and efficient, which improves production efficiency and reduces production costs. Attached Figure Description

[0016] Figure 1 This is a cross-sectional schematic diagram of a fixture provided by this utility model for mounting a sealing ring on a shaft. Figure 2 This is a schematic diagram of the connection between the transition shaft and the shaft body provided by this utility model; Figure 3 This is a partial schematic diagram of the reduced diameter section provided by this utility model; In the diagram: transition shaft 100, reduced diameter section 101, variable diameter section 102, equal diameter section 103; 200, 201, 202, 203, 200; Insertion end 300, spring piece 301, elastic area 302, top opening 303; Shaft 400, sealing ring 401. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0019] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0020] Reference Figure 1-3 The image shown is a preferred embodiment of the present invention.

[0021] A fixture suitable for mounting a sealing ring on a shaft includes a transition shaft 100, one end of which has a reduced diameter section 101, the diameter of which is smaller than the diameter of the sealing ring 401; the other end of which has an expanded diameter section, the diameter of which is larger than the diameter of the shaft 400 and the diameter of which is larger than the diameter of the sealing ring 401. The end of the expansion section has a docking structure that connects with the shaft body 400. The docking structure connects the transition shaft 100 and the shaft body 400 into one unit. The sealing ring 401 is inserted by the reduction section 101 and, after being expanded by the expansion section, is fitted onto the shaft body 400.

[0022] The above-mentioned fixture for fitting the sealing ring 401 onto the shaft 400 utilizes the fact that the diameter of the reduced diameter section 101 is smaller than that of the sealing ring 401 when fitting the sealing ring 401, making it easy and effortless to fit the sealing ring 401, and avoiding damage to the sealing ring 401 due to improper operation during manual installation. By expanding the diameter of the expansion section to be larger than that of the shaft 400 and the sealing ring 401, the sealing ring 401 can be guided to expand its diameter and be accurately fitted onto the shaft 400, reducing the need for repeated adjustments due to misalignment or incomplete fitting, and improving the first-time success rate of assembly. In addition, the docking structure ensures a secure connection between the transition shaft 100 and the shaft body 400, making the entire assembly process smooth and efficient, which improves production efficiency and reduces production costs.

[0023] In this embodiment, the transition shaft 100 is integrally formed; this ensures the overall structural stability and strength of the fixture, and the integral forming method reduces the potential risk of loosening of the connection of multiple parts. Especially in frequent mechanical operations, it ensures the precise positioning and fit of the contact part between the transition shaft 100 and the sealing ring 401.

[0024] For example, when applied to robotic arm assembly scenarios on automated production lines, this stability can reduce the impact of mechanical vibration on assembly accuracy, ensuring that the sealing ring 401 is installed accurately and reliably every time, thereby effectively improving assembly efficiency.

[0025] By using one-piece molding, the accumulation of errors that may occur due to the separate connection is reduced, making it easier to control the dimensional accuracy of the reduced diameter section 101 and the expanded diameter section, and further ensuring the smooth transition of the sealing ring 401 to the shaft 400.

[0026] In this embodiment, the transition shaft 100 is straight, thus providing a straight path for the sealing ring 401 to be fitted, achieving linear movement of the sealing ring 401 without the need for complex guiding devices; moreover, the smooth surface of the transition shaft 100 makes the fitting process of the sealing ring 401 smoother and more efficient.

[0027] In this embodiment, the diameter of the narrowing section 101 gradually increases along the direction from the narrowing section 101 to the widening section.

[0028] This ensures that the sealing ring 401 is evenly stressed when it is fitted, preventing damage to the sealing ring 401 due to excessive local stress. This is especially suitable for assembly scenarios of small sealing rings 401, such as sealing treatment of micro motor shafts. By gradually increasing in size, the sealing ring 401 can naturally fit the surface of the reduced diameter section 101 and gradually expand in the expanded diameter section, thus smoothly transitioning to the shaft 400. In addition, this gradual design ensures that the opening diameter of the sealing ring 401 is sufficiently balanced during the opening process, so that the sealing ring 401 maintains the same sufficiently balanced elasticity, thereby achieving a tighter fit to the shaft 400.

[0029] In this embodiment, the expansion section includes a variable diameter section 102 and a constant diameter section 103 with the same diameter. The variable diameter section 102 is connected between the reduction diameter section 101 and the constant diameter section 103. One end of the variable diameter section 102 has a small diameter end, and the other end of the variable diameter section 102 has a large diameter end. Along the direction from the small diameter end to the large diameter end, the diameter of the variable diameter section 102 gradually increases. The connection structure is located at the end of the constant diameter section 103. The small diameter end is connected to the reduced diameter section 101, and the large diameter end is connected to the equal diameter section 103. The diameter of the equal diameter section 103 is the same as the diameter of the large diameter end. The sealing ring 401 is inserted into the reduced diameter section 101, and after passing through the reduced diameter section 101, the deformed section and the equal diameter section 103 in sequence, it is fitted onto the shaft 400.

[0030] The variable diameter section 102 achieves a smooth expansion process for the sealing ring 401. For sealing rings 401 with high precision requirements, such as high-precision sealing rings, gradual expansion can reduce mechanical damage to the sealing ring 401 and ensure its sealing performance. It avoids the problem of excessive deformation of the sealing ring 401 caused by direct expansion. Furthermore, the connection between the variable diameter section 102 and the equal diameter section 103 further stabilizes the position of the sealing ring 401, providing precise center positioning for subsequent docking with the shaft 400, thereby making the installation of the sealing ring 401 on the shaft 400 more efficient and reliable.

[0031] In this embodiment, the end of the equal diameter section 103 forms a mating end 200, which is recessed downward to form a slot 201 for the shaft body 400 to be inserted into, and the slot 201 forms a mating structure.

[0032] The slot 201 formed at the end of the equal diameter section 103 provides a structure for quick insertion and positioning of the shaft 400. In practical applications, the depth of the slot 201 is different from the actual length of the shaft 400. Thus, after the shaft 400 is inserted into the slot 201, the position where the sealing ring 401 needs to be fitted on the shaft 400 is exposed on the mating end 200. The sealing ring 401 is fitted into the shaft 400 by the reduced diameter section 101, and then sequentially passes through the reduced diameter section 101, the deformed section and the equal diameter section 103 before being fitted onto the mating end 200.

[0033] In addition, the limiting function of the slot 201 can prevent the shaft 400 from shifting during installation, improve the coaxiality between the sealing ring 401 and the shaft 400, ensure the stable installation of the sealing ring 401 on the shaft 400, and indirectly improve production efficiency.

[0034] In this embodiment, the bottom of the slot 201 is flat, forming a bottom surface 202 for mating with the shaft 400. In this way, the flat bottom of the slot 201 provides a stable support surface for the shaft 400, effectively reducing the risk of misalignment of the shaft 400 during insertion. Especially on automated production lines, when rapid assembly is performed by robotic arms, the flat support surface can ensure the stability of the shaft 400 during insertion.

[0035] Meanwhile, the flat bottom surface of the slot 201 can disperse the contact stress of the shaft 400, avoid excessive local stress that could damage the shaft 400 or the fixture, extend the service life of the equipment, and improve overall reliability.

[0036] In this embodiment, the central axis of the slot 201 is arranged to coincide with the central axis of the transition shaft 100; this ensures the coaxiality requirement between the shaft 400 and the sealing ring 401 after the shaft 400 is inserted into the fixture, avoids uneven deformation or omission of the sealing ring 401 due to eccentric installation, and improves sealing performance and assembly quality. In addition, the overlapping arrangement of the central axes reduces the adjustment time during the assembly process, improves the speed and consistency of assembly, and enhances overall production efficiency.

[0037] In this embodiment, the outer periphery of the docking end 200 has an outer peripheral sidewall 203, which is arranged around the circumference of the slot 201; along the direction from the variable diameter section 102 to the constant diameter section 103, the outer peripheral sidewall 203 is arranged inclined inward.

[0038] The outer peripheral sidewall 203, which is arranged inwardly, can accurately guide the sealing ring 401 from the equal diameter section 103 into the shaft 400. Furthermore, the elasticity of the sealing ring 401 gradually contracts under the guidance of the inward inclination, eventually causing the sealing ring 401 to contract elastically and tightly fit into the position of the shaft 400 where sealing is required.

[0039] In this embodiment, the end of the reduced diameter section 101 is formed with an insertion end 300 for the sealing ring 401 to pass through. The outer periphery of the insertion end 300 is provided with a plurality of elastically deformable spring pieces 301, which are arranged at intervals along the circumference of the insertion end 300. The lower end of the spring piece 301 is connected to the outer periphery of the insertion end 300, and the upper end of the spring piece 301 is arranged inclined upward. Along the direction from the lower end to the upper end of the spring piece 301, the spring piece 301 is arranged inclined outward away from the reduced diameter section 101. Multiple spring pieces 301 and the diameter of the reduced diameter section 101 enclose an annular elastic region 302. The upper ends of the multiple spring pieces 301 and the reduced diameter section 101 enclose an annular top opening 303. The top of the elastic region 302 formed by the top opening 303 is larger than the diameter of the sealing ring 401.

[0040] The spring 301 provided at the insertion end 300 provides an elastic guide area for the insertion of the sealing ring 401. The elastic deformation of the spring 301 can provide a uniform expansion stress on the diameter of the sealing ring 401, allowing the fixture to accommodate more sealing rings 401 of different specifications, thereby reducing the frequency of fixture replacement, improving the versatility and flexibility of the production line, and also reducing the jamming that may occur because the diameter of the sealing ring 401 is similar to the diameter of the reduced diameter section 101.

[0041] The top opening 303 provides a roll-back position for the sealing ring 401, which prevents the sealing ring 401 from being ejected from the reduced diameter section 101 due to elastic contraction after it is inserted into the reduced diameter section 101. This improves assembly efficiency, especially for the operation process of repeatedly fitting the sealing ring 401, which can effectively reduce the failure rate and improve production efficiency.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fixture suitable for mounting a sealing ring on a shaft, characterized in that, The device includes a transition shaft, one end of which has a reduced diameter section with a diameter smaller than that of the sealing ring; the other end of which has an expanded diameter section with a diameter larger than that of the shaft body and also larger than that of the sealing ring. The end of the expansion section has a docking structure that connects with the shaft body. The docking structure connects the transition shaft and the shaft body as one unit. The sealing ring is inserted by the reduction section and, after being expanded by the expansion section, is fitted onto the shaft body.

2. The fixture as described in claim 1, suitable for mounting a sealing ring on a shaft, characterized in that, The transition shaft is integrally formed.

3. The fixture as described in claim 1, suitable for mounting a sealing ring on a shaft, characterized in that, The transition shaft is in the shape of a straight strip.

4. The fixture as described in claim 1, suitable for mounting a sealing ring on a shaft, characterized in that, Along the direction from the narrowing section to the widening section, the diameter of the narrowing section gradually increases.

5. The fixture as described in any one of claims 1-4, suitable for mounting a sealing ring on a shaft, characterized in that, The expanding section includes a variable diameter section and a constant diameter section with the same diameter. The variable diameter section is connected between the reducing diameter section and the constant diameter section. One end of the variable diameter section has a small diameter end, and the other end of the variable diameter section has a large diameter end. Along the direction from the small diameter end to the large diameter end, the diameter of the variable diameter section gradually increases. The connecting structure is located at the end of the constant diameter section. The small diameter end is connected to the reduced diameter section, and the large diameter end is connected to the equal diameter section. The diameter of the equal diameter section is the same as the diameter of the large diameter end. The sealing ring is inserted into the reduced diameter section, and after passing through the reduced diameter section, the deformed section and the equal diameter section in sequence, it is fitted onto the shaft body.

6. The fixture as described in claim 5, suitable for mounting a sealing ring on a shaft, characterized in that, The end of the equal diameter section forms a mating end, which is recessed downward to form a slot for the shaft to be inserted, and the slot forms the mating structure.

7. The fixture as described in claim 6, suitable for mounting a sealing ring on a shaft, characterized in that, The bottom of the slot is flat, forming a bottom surface for mating with the shaft.

8. The fixture as described in claim 6, suitable for mounting a sealing ring on a shaft, characterized in that, The central axis of the slot is arranged to coincide with the central axis of the transition shaft.

9. The fixture as described in claim 6, suitable for mounting a sealing ring on a shaft, characterized in that, The outer periphery of the mating end has an outer peripheral sidewall, which is arranged around the circumference of the slot; along the direction from the variable diameter section to the constant diameter section, the outer peripheral sidewall is arranged inclined inward.

10. The fixture as described in any one of claims 1-4, suitable for mounting a sealing ring on a shaft, characterized in that, The end of the reduced diameter section is formed with an insertion end for the sealing ring to pass through. The outer periphery of the insertion end is provided with a plurality of elastically deformable spring pieces, which are arranged at intervals along the circumference of the insertion end. The lower end of the spring piece is abutted against the outer periphery of the insertion end, and the upper end of the spring piece is arranged inclined upward. Along the direction from the lower end to the upper end of the spring piece, the spring piece is arranged inclined outward away from the reduced diameter section. Multiple spring pieces and the diameter of the reduced-diameter section enclose an annularly arranged elastic region. The upper ends of the multiple spring pieces and the reduced-diameter section enclose an annular top opening. The top of the elastic region formed by the top opening has a diameter larger than that of the sealing ring.

Images