Drum brake hub lacquering device and drum brake hub lacquering method

Abstract

The invention relates to a device for painting a drum brake hub, which is arranged on a drum brake bowl and is used for preventing electrophoresis liquid or paint from polluting the inner wall of the drum brake bowl when the drum brake hub is painted. The device can be a sleeve or a cap. The drum brake hub painting method comprises the steps that the inner wall of the drum brake bowl is subjected to finish machining, then the sleeve or the cover cap is installed in the drum brake bowl, electrophoresis painting is conducted, and the sleeve or the cover cap is taken down after electrophoresis painting is completed. According to the sleeve and the cap for painting the drum brake hub and the method for painting the drum brake hub, the problem that in the prior art, the drum brake hub is painted firstly and then electrophoretic liquid on the inner wall of a drum brake bowl is removed, so that the paint surface is damaged in the subsequent finish machining process is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle wheel hub processing, and specifically to a device for painting a drum brake wheel hub and a method for painting a drum brake wheel hub. Background Art

[0002] The existing drum brake wheel hubs are painted by electrophoresis process. The electrophoresis paint film has the advantages of plump, uniform, flat and smooth coating. The hardness, adhesion, corrosion resistance, impact resistance and penetration performance of the electrophoresis paint film are significantly better than other painting processes. Moreover, all welded parts can be evenly coated by the electrophoresis paint film, greatly improving the rust and corrosion resistance of the wheel hub.

[0003] However, since the inner wall of the drum brake bowl cannot retain electrophoresis liquid or paint, when using the electrophoresis process to paint the wheel hub, the inner wall of the drum brake bowl must be polished and finely processed at the end, and this process may damage the paint surface of the wheel hub. Summary of the Invention

[0004] The purpose of the present invention is to provide a device for painting a drum brake wheel hub and a method for painting a drum brake wheel hub, which solves the problem that in the prior art, the electrophoresis liquid on the inner wall of the drum brake bowl is removed after painting the drum brake wheel hub, resulting in damage to the paint surface during the subsequent fine processing.

[0005] To achieve the above purpose, the technical solution of the present invention is: A device for painting a drum brake wheel hub, which is arranged in the drum brake bowl when painting the drum brake wheel hub and is used to prevent electrophoresis liquid or paint from contaminating the inner wall of the drum brake bowl.

[0006] The device is a sleeve sleeved in the drum brake bowl. The sleeve is cylindrical, sleeved in the drum brake bowl, the outer wall of the sleeve fits with the inner wall of the drum brake bowl, the upper end of the sleeve is circumferentially provided with a cylindrical eaves protruding outward and capable of covering the upper edge of the drum brake bowl, and its bottom is provided with a stepped portion recessed inward.

[0007] The sleeve is made of rubber.

[0008] The device is a cap covering the top of the drum brake bowl. The cap includes a cap body with an outer wall fitting with the inner wall of the drum brake bowl, a cap eaves covering the upper edge of the drum brake bowl, and a cylindrical shaft hole plug arranged in the center of the cap for inserting into the wheel axle hole, and the outer wall of the shaft hole plug fits with the inner wall of the spoke hole.

[0009] An exhaust hole is arranged in the center of the shaft hole plug.

[0010] The cap is made of rubber.

[0011] A method for painting a drum brake wheel hub, the painting steps are as follows: A. Finely process the inner wall of the drum brake bowl; B. Install the device for painting the drum brake hub inside the drum brake bowl, cover the top of the drum brake bowl with the barrel edge of the sleeve, and make the bottom step of the sleeve fit with the bottom of the inner wall of the drum brake bowl; C. Place the drum brake hub in step B into the electrophoresis solution for electrophoresis painting; D. Spray the drum brake hub that has completed step C; E. After completing step D, take out the sleeve from the drum brake bowl, and then dry the drum brake hub.

[0012] A method for painting a drum brake hub, the painting steps are as follows: F. Finish machining the inner wall of the drum brake bowl; G. Cover the drum brake bowl with the device for painting the drum brake hub mentioned above, cover the top of the drum brake bowl with the brim of the cap, make the outer wall of the cap body fit with the inner wall of the drum brake bowl, and insert the shaft hole plug into the wheel shaft hole; H. Place the drum brake hub in step G into the electrophoresis solution for electrophoresis painting; I. Spray the drum brake hub that has completed step H; J. After completing step H, remove the cap from the drum brake bowl, and then dry the drum brake hub.

[0013] The advantages of the present invention are as follows: 1. The sleeve is installed in the drum brake bowl, and its outer wall fits with the inner wall of the drum brake bowl, effectively isolating the electrophoresis solution. During the electrophoresis painting process of the drum brake hub, the wall of the drum brake bowl will not be stained with the electrophoresis solution; 2. The cap covers the drum brake bowl, and during the electrophoresis process of the drum brake hub, the electrophoresis solution will not enter the drum brake bowl; 3. The exhaust hole in the center of the shaft hole plug opens up a channel for the gas in the wheel shaft hole, preventing the gas in the wheel shaft hole from expanding due to heat during electrophoresis and flushing the cap open, resulting in the electrophoresis solution entering the drum brake bowl; 4. Using the sleeve or the cap during the electrophoresis painting process of the drum brake hub, the inner wall of the drum brake bowl can be machined finely before painting. In this way, after the electrophoresis painting is completed, the painting of the entire hub is completed, avoiding the problem of damaging the paint surface caused by machining the drum brake bowl after the hub painting in the prior art. Description of the Drawings

[0014] Figure 1 It is a structural sectional view of the drum brake hub.

[0015] Figure 2 It is a schematic structural view of the sleeve of the present invention.

[0016] Figure 3 It is a structural sectional view of the sleeve of the present invention.

[0017] Figure 4 It is a structural sectional view of the sleeve used in the drum brake hub of the present invention.

[0018] Figure 5 It is a schematic structural view of the cap of the present invention.

[0019] Figure 6 This is a cross-sectional view of the cap structure of the present invention.

[0020] In the figure: 1 - drum brake bowl; 11 - inner wall of the drum brake bowl; 2 - wheel axle hole; 3 - sleeve; 31 - outer wall of the sleeve; 32 - barrel eaves; 33 - stepped portion; 4 - cap; 41 - cap body; 42 - cap eaves; 43 - axle hole plug; 44 - exhaust hole. Specific embodiments

[0021] The following further describes the present invention with reference to the accompanying drawings. The accompanying drawings are only for illustrative purposes and should not be construed as a limitation of this patent.

[0022] For the sake of more concise description of this embodiment, some components that are well-known to those skilled in the art but not relevant to the main content of this creation will be omitted in the drawings or description. Additionally, for the convenience of expression, some components in the drawings will be omitted, enlarged, or reduced, but this does not represent the size or all structures of the actual product.

[0023] An apparatus for painting a drum brake wheel hub of the present invention is provided in the drum brake bowl 1 and is used to prevent the inner wall 11 of the drum brake bowl from being contaminated by electrophoresis liquid or paint when painting the drum brake wheel hub. Embodiment

[0024] An apparatus for painting a drum brake wheel hub, as Figure 2 , Figure 3 shown, is a sleeve 3 sleeved in the drum brake bowl 1. The sleeve 3 is cylindrical and is sleeved in the drum brake bowl 1 of the drum brake wheel hub as Figure 1 shown. The sleeve 3 is inserted into the drum brake bowl 1, the outer wall 31 of the sleeve is in contact with the inner wall 11 of the drum brake bowl, the upper end of the sleeve 3 is circumferentially provided with outwardly protruding barrel eaves 32 that can cover the upper edge of the drum brake bowl 1, and its bottom is provided with an inwardly concave stepped portion 33, and the stepped portion 33 is adapted to the step at the bottom of the inner wall 11 of the drum brake bowl.

[0025] For convenience of sleeving and removal, preferably, the sleeve 3 is made of rubber.

[0026] As Figure 1 shown, for the drum brake wheel hub, the inner wall 11 of its drum brake bowl cannot be contaminated by foreign objects (including electrophoresis liquid, paint, etc.), otherwise safety accidents will occur during use. The sleeve 3 is used in the electrophoresis painting process of the drum brake wheel hub and can effectively isolate the electrophoresis liquid to ensure that the electrophoresis liquid, paint, etc. will not contaminate the inner wall 11 of the drum brake bowl.

[0027] A method for painting a drum brake wheel hub, the painting steps are as follows: A. Perform fine machining such as polishing on the inner wall 11 of the drum brake bowl of the drum brake wheel hub to be subjected to electrophoresis painting; B. Install the aforementioned apparatus for painting a drum brake wheel hub in the drum brake bowl 1, as Figure 4As shown, cover the top of the drum brake bowl 1 with the barrel eaves 32 of the sleeve 3. The bottom step 33 of the sleeve 3 fits with the bottom step of the inner wall 11 of the drum brake bowl, so that the electrophoresis liquid is isolated by the sleeve 3 and the inner wall 11 of the drum brake bowl, and the electrophoresis liquid will not pollute or damage the inner wall 11 of the drum brake bowl; C. Place the drum brake hub obtained in step B into the electrophoresis liquid for electrophoresis painting; D. Spray the drum brake hub completed in step C; E. After completing step D, take out the sleeve 3 from the drum brake bowl 1, and then dry the drum brake hub to complete the electrophoresis painting process. Embodiment

[0028] A device for painting a drum brake hub, as Figure 5 、 Figure 6 shown, the device is a cap 4 covering the top of the drum brake bowl 1. The cap 4 includes a cap body 41 whose outer wall fits with the inner wall 11 of the drum brake bowl, a cap eaves 42 covering the upper edge of the drum brake bowl 1, and a shaft hole plug 43 arranged in the center of the cap 4 for inserting into the wheel axle hole 2. The outer wall of the shaft hole plug 43 fits with the inner wall of the spoke hole 2.

[0029] Furthermore, to prevent the gas in the spoke hole 2 from expanding due to heat during electrophoresis and possibly pushing up the cap 4, an exhaust hole 44 is provided in the center of the shaft hole plug 43 to open an exhaust channel for the gas in the wheel axle hole 2.

[0030] For ease of use, preferably, the cap 4 is made of rubber.

[0031] As Figure 1 shown, for the drum brake hub, the inner wall 11 of the drum brake bowl cannot be contaminated with foreign objects (including electrophoresis liquid, paint, etc.), otherwise safety accidents will occur during use. The cap 4 is used in the electrophoresis painting process of the drum brake hub and can effectively isolate the electrophoresis liquid to ensure that the electrophoresis liquid, paint, etc. will not enter the drum brake bowl 1 and contaminate the inner wall 11 of the drum brake bowl.

[0032] A method for painting a drum brake hub, the painting steps are as follows: F. Finish machining the inner wall 11 of the drum brake bowl; G. Cover the drum brake hub with the above-mentioned device for painting the drum brake hub. The cap eaves 42 of the cap cover the top of the drum brake bowl 1, the outer wall of the cap body 41 fits with the inner wall 11 of the drum brake bowl, and the shaft hole plug 43 is inserted into the wheel axle hole 2. In this way, the electrophoresis liquid is isolated by the cap 4 and the drum brake bowl 1, and the electrophoresis liquid cannot enter the drum brake bowl 1 to pollute or damage the cleanliness of the inner wall 11 of the drum brake bowl;; H. Place the drum brake hub obtained in step G into the electrophoresis liquid for electrophoresis painting; I. Spray the drum brake hub completed in step H; J. After completing step H, remove the cap 4 from the drum brake bowl 1, and then dry the drum brake hub to complete the electrophoretic painting process.

[0033] In summary, the above are only the preferred embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made to the content of the scope of the patent application of the present invention shall fall within the technical scope of the present invention.

Claims

1. A device for painting a drum brake hub, characterized in that: When painting the drum brake hub, it is arranged in the drum brake bowl (1) and used to prevent the electrophoresis liquid or paint from contaminating the inner wall (11) of the drum brake bowl.

2. The device for painting a drum brake hub as described in claim 1, characterized in that: The device is a sleeve (3) sleeved in the drum brake bowl (1). The sleeve (3) is cylindrical. The outer wall (31) of the sleeve fits with the inner wall (11) of the drum brake bowl. The upper end of the sleeve (3) is circumferentially provided with a cylindrical eaves (32) protruding outward and capable of covering the upper edge of the drum brake bowl (1), and its bottom is provided with a stepped portion (33) concave inward.

3. The device for painting the drum brake hub as described in claim 2, characterized in that: The sleeve (3) is made of rubber.

4. The device for painting the drum brake hub as described in claim 1, characterized in that: The device is a cap (4) covering the top of the drum brake bowl (1). The cap (4) includes a cap body (41) whose outer wall fits with the inner wall (11) of the drum brake bowl, a cap eaves (42) covering the upper edge of the drum brake bowl (1), and a shaft hole plug (43) arranged in the center of the cap (4) for inserting into the wheel axle hole (2). The outer wall of the shaft hole plug (43) fits with the inner wall of the spoke hole (2).

5. The device for painting a drum brake hub as claimed in claim 4, wherein: An exhaust hole (44) is arranged in the center of the shaft hole plug (43).

6. The device for painting a drum brake hub as claimed in claim 5, wherein: The cap (4) is made of rubber.

7. A method for painting a drum brake hub, characterized in that: The painting steps are as follows: A. Finish machining the inner wall (11) of the drum brake bowl. B. Install the device for painting the drum brake hub as described in claim 2 or 3 in the drum brake bowl, cover the top of the drum brake bowl (1) with the cylindrical eaves (32) of the sleeve (3), and make the stepped portion (33) at the bottom of the sleeve (3) fit with the bottom of the inner wall (11) of the drum brake bowl. C. Put the drum brake hub in step B into the electrophoresis liquid for electrophoresis painting. D. Spray the drum brake hub completed in step C. E. After completing step D, take out the sleeve (3) from the drum brake bowl (1), and then dry the drum brake hub.

8. A method for painting a drum brake hub, characterized in that: The painting steps are as follows: F. Finish machining the inner wall (11) of the drum brake bowl. G. Cover the drum brake bowl with the device for painting the drum brake hub as described in claim 4 or 5 or 6. Cover the top of the drum brake bowl (1) with the cap eaves (42) of the cap, make the outer wall of the cap body (41) fit with the inner wall of the drum brake bowl (1), and insert the shaft hole plug (43) into the wheel axle hole (2). H. Put the drum brake hub in step G into the electrophoresis liquid for electrophoresis painting. I. Spray the drum brake hub completed in step H. J. After completing step H, remove the cap (4) from the drum brake bowl (1), and then dry the drum brake hub.

Images