Pulley guard for protecting pulley threads during electrophoresis

Abstract

The application discloses a pulley protection device for protecting the thread of a pulley during electrophoresis, which comprises an upper protection part and a lower protection part, the upper protection part is used for protecting the thread part of the pulley, the lower protection part is used for protecting the inner cavity of the pulley, the upper protection part is detachably connected with the thread part of the pulley, and a seal is formed between the upper protection part and the thread part of the pulley, the lower protection part is inserted from the lower end of the inner cavity of the pulley to the direction of the upper protection part, and a seal is formed between the lower protection part and the inner cavity of the pulley after connection, and the lower protection part can be clamped with the upper protection part, so that the thread position and the inner cavity position of the pulley can be protected during electrophoresis, the protection effect is good, and the structure is simple.

Description

Technical Field

[0001] This invention relates to a pulley protection device, specifically a pulley protection device for protecting the threads of a pulley during electrophoresis. Background Technology

[0002] In industrial production, pulleys often require electrophoresis to form a protective coating, thereby improving their corrosion resistance and service life. However, as a critical mating part, the threaded structure of the pulley can suffer from reduced thread accuracy, assembly difficulties, and even component failure if it is covered by electrophoretic paint during the electrophoresis process. Therefore, it is crucial to ensure that the threaded parts and inner ring of the pulley are not electrophoretically coated during the electrophoresis process. Existing thread protection methods mostly involve wrapping with tape or temporarily sealing with rubber plugs. However, tape alone is prone to falling off after being soaked in electrophoretic solution, allowing paint to seep into the threads and causing electrophoresis on the threaded areas. When rubber plugs are used alone, the fit between the rubber plug and the thread is insufficient, easily forming gaps and affecting the protective effect. Moreover, after repeated disassembly and replacement, the fit between the rubber plug and the thread will decrease, and this operation is cumbersome, time-consuming, and labor-intensive, reducing production efficiency. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a pulley protection device for protecting the pulley threads during electrophoresis, so as to solve the problems mentioned in the background art that the pulley thread position and inner ring position are easily electrophoresed, the existing plugs have poor sealing effect and affect the appearance.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a pulley protection device for protecting the threads of a pulley during electrophoresis, comprising an upper protection part and a lower protection part. The upper protection part is used to protect the threaded portion of the pulley, and the lower protection part protects the inner cavity of the pulley. The upper protection part is detachably connected to the threaded portion of the pulley, and a seal is formed between the upper protection part and the threaded portion of the pulley. The lower protection part is inserted from bottom to top from the lower end of the inner cavity of the pulley toward the upper protection part, and a seal is formed between the lower protection part and the inner cavity of the pulley after connection. The lower protection part can be engaged with the upper protection part.

[0005] As a further improvement of the present invention, the upper protective part includes a cap and a cap body, a cap cavity for accommodating the threaded portion of the pulley is formed between the cap and the cap body, the inner wall of the cap cavity is provided with an internal thread for threaded connection with the threaded portion of the pulley, and a sealing element for sealing the connection between the cap body and the pulley is provided between the cap body and the pulley.

[0006] As a further improvement of the present invention, the sealing element is a sealing gasket, the upper and lower end faces of the sealing gasket are both flat, and the sealing gasket is elastic.

[0007] As a further improvement of the present invention, the lower edge of the cap body facing the sealing gasket is provided with a protruding edge for sealing with the upper end face of the sealing gasket, and the side of the protruding edge facing the upper end face of the sealing gasket is flat.

[0008] As a further improvement of the present invention, the lower end face of the sealing gasket abuts against the inclined wall disposed on the pulley and can form a seal.

[0009] As a further improvement of the present invention, the lower protective part includes a column and a sealing ring disposed on the column. The sealing ring is disposed at the lower edge of the inner ring of the pulley and can form a seal with it.

[0010] As a further improvement of the present invention, a slide bar is slidably provided on the cap, and the connection position between the slide bar and the cap forms a seal. A buckle is provided at the upper end of the column corresponding to the position of the slide bar. The buckle can be connected with the slide bar to prevent the lower protective part from coming off the inner ring of the pulley.

[0011] As a further improvement of the present invention, the slide bar is provided with a bevel, the bevel is connected to a buckle, and the slide bar slides to drive the column to move toward / away from the inner ring of the pulley through the bevel.

[0012] Compared with the prior art, the present invention provides a pulley protection device for protecting the threads of pulleys during electrophoresis, which has the following beneficial effects: The protection device is detachably and sealed to the pulley thread through an upper protective part, which can prevent electrophoretic liquid from contacting the threads, avoid thread corrosion or blockage, and ensure the thread fit accuracy. The lower protective part is inserted into the inner cavity of the pulley from bottom to top and forms a seal, which can prevent electrophoretic liquid from seeping into the inner cavity. At the same time, it is engaged with the upper protective part to enhance the overall sealing and connection stability, preventing the protective part from falling off. The upper and lower protections can protect different positions of the pulley respectively, with a larger protection range and better protection effect. It is adapted to the structural characteristics of the pulley, is easy to install and disassemble, does not affect the normal operation of the electrophoresis process, effectively protects the key parts of the pulley, and improves the pass rate and service life of the pulley after electrophoresis. Attached Figure Description

[0013] Figure 1 This is the front view of the present invention; Figure 2 This is a cross-sectional view of the present invention in use; Figure 3 The accompanying drawings are for reference only. Figure 1 Cross-sectional view along section line A; Figure 4 This is a partial exploded view of the structure of the present invention; Figure 5 This is a structural diagram of the column of the present invention.

[0014] Reference numerals: 1. Upper protective part; 2. Lower protective part; 3. Pulley; 11. Cap; 12. Cap body; 13. Cap cavity; 14. Internal thread; 15. Sealing gasket; 16. Raised edge; 111. Sliding strip; 112. Beveled edge; 21. Column; 22. Sealing ring; 23. Buckle. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0016] As shown in the figure, in order to achieve the above-mentioned objective, the present invention provides a pulley 3 protection device for protecting the threads of a pulley 3 during electrophoresis, including an upper protection part 1 and a lower protection part 2. The upper protection part 1 is used to protect the threaded portion of the pulley 3, and the lower protection part 2 protects the inner cavity of the pulley 3. The upper protection part 1 is detachably connected to the threaded portion of the pulley 3, and a seal is formed between the upper protection part 1 and the threaded portion of the pulley 3. The lower protection part 2 is inserted from the lower end of the inner cavity of the pulley 3 toward the upper protection part 1 from bottom to top, and a seal is formed between the lower protection part 2 and the inner cavity of the pulley 3 after connection. The lower protection part 2 can be engaged with the upper protection part 1.

[0017] In the implementation of this solution, the upper protective part 1 adopts an internal thread 14 structure that matches the threaded part of the pulley 3, which is used to protect the threaded part of the pulley 3. The upper protective part 1 and the threaded part of the pulley 3 are detachably connected by threads, and a sealing ring is fitted at the connection to form a seal. The sealing ring in this solution can be made of rubber, which is elastic and has a good sealing effect. The lower protective part 2 is a cylindrical structure made of elastic material resistant to electrophoretic corrosion. It protects the inner cavity of the corresponding pulley 3. The lower protective part 2 is inserted from the lower end of the inner cavity of the pulley 3 towards the upper protective part 1. The outer wall is provided with an annular sealing flange, which fits with the pulley 3 to form a seal. The top of the lower protective part 2 is provided with a buckle 23, which can be fixed with the structure at the bottom of the upper protective part 1 that is used to engage with the buckle 23. This structure can be a slide bar 111 with a snap-fit ​​interface. In use, first screw the upper protective part 1 into the threaded part of the pulley 3 until it is sealed, then insert the lower protective part 2 from the lower end of the inner cavity of the pulley 3 until its top buckle 23 engages with the upper protective part 1. During electrophoresis, the upper and lower protective parts 2 work together to isolate the electrophoretic liquid from contacting the threaded part and inner cavity of the pulley 3. After completion, the reverse operation can be performed to disassemble. It is easy to disassemble and assemble, and has a good sealing effect. This embodiment achieves double sealing protection through threaded connection and snap-fit, effectively avoiding the corrosion of the threads of the pulley 3 by the electrophoretic liquid. It is easy to install and provides reliable protection.

[0018] As an improved specific embodiment, the upper protective part 1 includes a cap 11 and a cap body 12. A cap cavity 13 for accommodating the threaded portion of the pulley 3 is formed between the cap 11 and the cap body 12. The inner wall of the cap cavity 13 is provided with an internal thread 14 for threaded connection with the threaded portion of the pulley 3. A sealing element for sealing the connection between the cap body 12 and the pulley 3 is provided between the cap body 12 and the pulley 3. The sealing element is a sealing washer 15. The upper and lower end faces of the sealing washer 15 are both flat, and the sealing washer 15 is elastic.

[0019] In implementing this solution, first check the elasticity of the sealing gasket 15 to ensure it is undamaged. Then, slip it onto the bottom of the threaded portion of the pulley 3. Align the cap cavity 13 of the upper protective part 1 with the threaded portion and screw it in until the lower end face of the cap body 12 is completely in contact with the sealing gasket 15. Continue rotating the cap body 12 to apply pressure to the sealing gasket 15 and form a seal. Next, hold the lower protective part 2 and align its axis with the inner axis of the pulley 3, then smoothly insert it from bottom to top. When the top buckle 23 contacts the bottom locking structure of the cap body 12, those skilled in the art can adjust the position of the locking structure on the cap body 12 to make the two lock together and confirm that they are locked in place. At this time, the annular sealing flange is tightly fitted with the inner cavity wall. During electrophoresis, the entire protective device is immersed in the electrophoresis solution along with pulley 3. The upper and lower sealing structures work together to prevent liquid from seeping into the threaded part and inner cavity. After electrophoresis, first release the snap-fit ​​and pull out the lower protective part 2 downwards; then unscrew the upper protective part 1 in the opposite direction, remove the sealing gasket 15, clean it, and store it. The seal in this solution is a seal to prevent the electrophoresis solution from entering.

[0020] As an improved embodiment, the lower edge of the cap 12 facing the sealing gasket 15 is provided with a protruding edge 16 for sealing with the upper end face of the sealing gasket 15. The side of the protruding edge 16 facing the upper end face of the sealing gasket 15 is flat. The lower end face of the sealing gasket 15 abuts against the inclined wall provided on the pulley 3 and can form a seal.

[0021] In this solution, the lower edge 16 of the cap 11 facing the sealing gasket 15 is in contact with the upper surface of the sealing gasket 15. Since the end face of the convex edge 16 is flat, it can form a surface contact with the sealing gasket 15. During the tightening process, the convex edge 16 gradually squeezes the upper surface of the sealing gasket 15, causing its lower end face to abut tightly against the inclined wall of the pulley 3. Because the sealing gasket 15 is elastic, it deforms along the contour of the inclined wall after being squeezed, filling the gap between the inclined surface and the flat surface, forming a two-way seal. The planar structure of the convex edge 16 can avoid excessive local deformation of the sealing gasket 15, ensuring uniform sealing and good sealing protection. Under the action of elasticity, the sealing gasket 15 can automatically return to its original shape when it is not under pressure.

[0022] As an improved specific embodiment, the lower protective part 2 includes a column 21 and a sealing ring 22 disposed on the column 21. The sealing ring 22 is disposed at the lower edge of the inner ring of the pulley 3 and can form a seal with it.

[0023] In the implementation of this solution, a sealing ring 22 is set on the column 21. This sealing ring 22 is circumferentially set on the column 21 and can be used to form a seal with the pulley 3.

[0024] As an improved embodiment, a slide bar 111 is slidably provided on the cap 11, and the connection position between the slide bar 111 and the cap 11 forms a seal. A buckle 23 is provided at the upper end of the column 21 corresponding to the position of the slide bar 111. The buckle 23 can be connected with the slide bar 111 to prevent the lower protective part 2 from coming off the inner ring of the pulley 3.

[0025] In implementation, this solution uses a slide bar 111 on the cap 11. The connection between the slide bar 111 and the cap 11 can be sealed with sealant. Those skilled in the art can slide the slide bar 111 to engage with the buckle 23 on the column 21. Those skilled in the art can also adjust the sealing strength between the sealing ring 22 and the pulley 3 by setting a sloping surface structure on the slide bar 111 that can drive the buckle 23 toward the cap 11. The structure is simple and easy to operate.

[0026] As an improved embodiment, the slide bar 111 is provided with a bevel 112, which is connected to the buckle 23. The slide bar 111 slides to drive the column 21 to move toward / away from the inner ring of the pulley 3 via the bevel 112.

[0027] In implementation, this solution uses a beveled edge 112 on the slide bar 111. This beveled edge 112 can be slid by a person skilled in the art through the operation of the slide bar 111, allowing different positions of the beveled edge 112 to engage with the buckle 23. When the buckle 23 is connected to the position with the smallest slope of the beveled edge 112, the sealing ring 22 on the column 21 experiences the least pressure, and at this time, the sealing ring 22 and the pulley 3 can form a seal. When the buckle 23 is connected to the position with the largest slope of the beveled edge 112, the sealing ring 22 on the column 21 experiences the greatest pressure, and at this time, the sealing performance between the sealing ring 22 and the pulley 3 is good, and the column 21 is not easy to come out of the inner cavity of the pulley 3.

[0028] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A pulley protection device for protecting the threads of a pulley during electrophoresis, characterized in that, The device includes an upper protective part and a lower protective part. The upper protective part protects the threaded portion of the pulley, and the lower protective part protects the inner cavity of the pulley. The upper protective part is detachably connected to the threaded portion of the pulley, forming a seal between them. The lower protective part inserts from the bottom up from the lower end of the inner cavity of the pulley toward the upper protective part, forming a seal between them after insertion. The lower protective part can engage with the upper protective part. The upper protective part includes a cap and a cap body, with a cap cavity formed between the cap and the cap body for accommodating the threaded portion of the pulley. The inner wall of the cap cavity has internal threads for threaded connection with the threaded portion of the pulley. A sealing element, a sealing gasket, is provided between the cap body and the pulley to seal the connection between them. The sealing element is a sealing gasket with both its upper and lower ends being... The sealing gasket is flat and elastic. The lower edge of the cap facing the sealing gasket has a protruding edge for sealing against the upper surface of the sealing gasket; the protruding edge facing the upper surface of the sealing gasket is flat. The lower surface of the sealing gasket abuts against an inclined wall on the pulley and forms a seal. The lower protective part includes a column and a sealing ring on the column, the sealing ring being positioned corresponding to the lower edge of the inner ring of the pulley and forming a seal with the pulley. A sliding strip is slidably mounted on the cap, the connection between the sliding strip and the cap being sealed with sealant. A buckle is provided at the upper end of the column corresponding to the sliding strip, the buckle connecting to the sliding strip to prevent the lower protective part from dislodging from the inner ring of the pulley. A bevel is provided on the sliding strip, the bevel engaging with the buckle, the sliding strip sliding to move the column closer to or further away from the inner ring of the pulley via the bevel.

Images