An automatic positioning tool for hub paint spraying

Abstract

This utility model relates to the field of wheel hub positioning technology, specifically to an automatic positioning fixture for wheel hub painting. The fixture includes a support assembly, a guide block, and expansion sleeves. The support assembly includes a base, a connecting rod fixedly connected to the upper surface of the base, a support block fixedly connected to the upper end of the connecting rod, and a sliding groove at the lower end of the support block. Multiple expansion sleeves are spaced circumferentially along the conical surface of the guide block, and the expansion sleeves are connected to the sliding grooves. One end of an elastic element is connected to the guide block, and the other end is connected to the lower surface of the base. Through the cooperation of the fixing assembly, expansion sleeves, and guide block, when the wheel hub is placed on the support block, the support block moves downward along the length of the connecting rod fixed to the base. At this time, the expansion sleeves move radially outward along the connecting rod until the end of the expansion sleeve furthest from the guide block contacts and is fixed to the inner wall of the wheel hub. This fixes the center point of the wheel hub directly above the guide block, thus preventing obstruction of the center hole and fixing the center position of the wheel hub.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub positioning technology, and specifically to an automatic positioning fixture for wheel hub painting. Background Technology

[0002] Painting wheel rims can effectively improve their durability, aesthetics, and functionality. The paint layer formed by the painting can effectively isolate external substances, reduce surface oxidation and rust, and extend their lifespan. The paint layer can also use a variety of materials to meet personalized needs.

[0003] Because protective covers are installed on areas that do not need to be painted during spraying, the main focus during spraying is to determine the center position of the wheel hub. Most existing positioning devices use the center hole of the wheel hub in conjunction with a positioning roller to achieve the center positioning effect. However, this design results in poor painting effect in the center part, which cannot meet personalized needs. Utility Model Content

[0004] The purpose of this invention is to solve the problem that traditional wheel hub positioning devices will cover part of the painting position, and to provide an automatic positioning fixture for wheel hub painting. This device can fix the center position of the wheel hub without blocking the center hole.

[0005] To achieve the above objectives, this utility model provides an automatic positioning fixture for wheel hub painting, which includes: The support assembly includes a base (l), a connecting rod (2) is fixedly connected to the upper surface of the base (l), a support block (3) is fixedly connected to the upper end of the connecting rod (2), a hole is provided in the center of the support block (3) for the support block (3) to slide on the connecting rod (2), and a groove (3l) is provided at the lower end of the support block. Guide block (4), the guide block (4) is provided with a hole for the connecting rod (2) to pass through, and the outer surface of the guide block (4) is set as a conical surface; The expansion sleeve (5) is provided in multiple ways. The multiple expansion sleeves (5) are arranged circumferentially along the conical surface of the guide block (4). The top end of the expansion sleeve (5) is connected to the slide groove (31).

[0006] Preferably, the upper surface of the support block is uniformly coated with an anti-adhesive coating.

[0007] Preferably, the slide groove is T-shaped, and the expansion sleeve is slidably connected to the slide groove. Preferably, the inner side of the expansion sleeve is provided with a contact surface for contacting the guide block.

[0008] Preferably, the taper of the guide block's conical surface is set between 1:2 and 1:4.

[0009] Preferably, an elastic element is also connected between the support block and the base.

[0010] Preferably, the elastic element is a spring, and the diameter of the central hole of the spring is larger than the diameter of the connecting rod.

[0011] Through the above technical solution, by using the fixed components, expansion sleeve and guide block together, when the hub is placed on the support block, due to the weight of the hub, the support block moves downward along the length of the connecting rod fixed on the base. At this time, since the top of the expansion sleeve is restricted on the slide groove, the expansion sleeve moves radially outward along the connecting rod until the end of the expansion sleeve away from the guide block contacts and is fixed to the inner wall of the hub. In this way, the center point of the hub will be fixed directly above the guide block, thereby avoiding obstruction of the center hole and fixing the center position of the hub. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an automatic positioning fixture for wheel hub painting provided by this utility model; Figure 2 yes Figure 1 A schematic diagram of the structure at the central support plate.

[0013] Explanation of reference numerals in the attached figures 1. Base; 2. Connecting rod; 3. Support block; 4. Guide block; 5. Expansion sleeve; 6. Spring; 31. Slide groove; 51. Fitting surface. Detailed Implementation

[0014] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0015] like Figure 1-2As shown, this utility model provides an automatic positioning fixture for wheel hub painting. The positioning fixture includes a support assembly, a guide block 4, and an expansion sleeve 5. The support assembly includes a base 1, a connecting rod 2 fixedly connected to the upper surface of the base 1, a support block 3 fixedly connected to the upper end of the connecting rod 2, a hole provided in the center of the support block 3 for sliding on the connecting rod 2, a groove 31 provided at the lower end of the support block, a hole provided in the guide block 4 for the connecting rod 2 to pass through, and a conical surface provided on the outer surface of the guide block 4. Multiple expansion sleeves 5 are provided, and the multiple expansion sleeves 5 are spaced apart circumferentially along the conical surface of the guide block 4. The top end of the expansion sleeve 5 is connected to the groove 31. One end of the elastic element is connected to the guide block 4, and the other end is connected to the lower surface of the base 1. By using the fixing components, expansion sleeve 5, and guide block 4 in conjunction, when the wheel hub is placed on the support block 3, due to the weight of the wheel hub, the support block 3 moves downward along the length of the connecting rod 2 fixed to the base 1. At this time, because the top of the expansion sleeve 5 is restricted on the sliding groove 31, the expansion sleeve 5 moves radially outward along the connecting rod 2 until the end of the expansion sleeve 5 away from the guide block 4 contacts and is fixed to the inner wall of the wheel hub. In this way, the center point of the wheel hub is fixed directly above the guide block 4, thus avoiding obstruction of the center hole and fixing the center position of the wheel hub. This design prioritizes meeting the customization needs of the wheel hub, allowing for spraying on the entire outer surface of the wheel hub, while other parts that do not require spraying only need to be covered with spraying tape.

[0016] According to the technical solution provided by this utility model, the upper surface of the support block 3 is uniformly coated with an anti-adhesive coating. This design is to prevent paint from sticking to the support block, as excessive accumulation will affect production.

[0017] like Figure 2 As shown, the slide groove 31 is T-shaped, and the expansion sleeve 5 is slidably connected to the slide groove 31. Each expansion sleeve 5 has an inner contact surface 51 for contacting the guide block 4. This arrangement is to confine the expansion sleeve 5 to the slide groove 31 and contact the guide block 4, preventing the expansion sleeve 5 from falling off.

[0018] In some embodiments, the taper of the guide block 4 is set between 1:2 and 1:4. This ensures that the expansion sleeve 5 is subjected to appropriate radial outward pressure along the connecting rod, while also preventing the guide block 4 from being too long and reducing production costs.

[0019] According to the technical solution provided by this utility model, an elastic element is also connected between the support block 3 and the base 1. By reasonably setting the spring 6, the support block 3, the expansion sleeve 5 and the guide block 4 can return to their original positions after use, reducing manual restoration. In some embodiments, the elastic element is set as the spring 6, and the diameter of the central hole of the spring 6 is larger than the diameter of the connecting rod 2.

[0020] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. An automatic positioning fixture for wheel hub painting, characterized in that, include: The support assembly includes a base (1), a connecting rod (2) is fixedly connected to the upper surface of the base (1), a support block (3) is fixedly connected to the upper end of the connecting rod (2), a hole is provided in the center of the support block (3) for the support block (3) to slide on the connecting rod (2), and a groove (31) is provided at the lower end of the support block. Guide block (4), the guide block (4) is provided with a hole for the connecting rod (2) to pass through, and the outer surface of the guide block (4) is set as a conical surface; The expansion sleeve (5) is provided in multiple ways. The multiple expansion sleeves (5) are arranged circumferentially along the conical surface of the guide block (4). The top end of the expansion sleeve (5) is connected to the slide groove (31).

2. The automatic positioning fixture for wheel hub painting according to claim 1, characterized in that, The upper surface of the support block (3) is uniformly coated with an anti-adhesive coating.

3. The automatic positioning fixture for wheel hub painting according to claim 1, characterized in that, The slide groove (31) is T-shaped, and the expansion sleeve (5) is slidably connected to the slide groove (31).

4. The automatic positioning fixture for wheel hub painting according to claim 1, characterized in that, The inner side of each expansion sleeve (5) is provided with a fitting surface (51) for fitting the guide block (4).

5. The automatic positioning fixture for wheel hub painting according to claim 1, characterized in that, The taper of the guide block (4) is set between 1:2 and 1:

4.

6. The automatic positioning fixture for wheel hub painting according to claim 1, characterized in that, An elastic element is also connected between the support block (3) and the base (1).

7. The automatic positioning fixture for wheel hub painting according to claim 6, characterized in that, The elastic element is set as a spring (6), and the diameter of the central hole of the spring (6) is larger than the diameter of the connecting rod (2).

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