Eccentric positioning device for vehicle

Abstract

The utility model discloses a vehicle eccentric positioning device which comprises an eccentric shaft, a gasket, a nut and a stud, the eccentric shaft further comprises a shaft body a, a baffle and a shaft body b, the baffle is located between the shaft body a and the shaft body b, and the shaft body a, the baffle and the shaft body b are of an integrated structure; the center line of the shaft body a and the center line of the shaft body b are not on the same straight line, the difference between the two center lines is 0.5 + / -0.015 mm, and the center line of the shaft body a coincides with the center line of the gasket. The shaft body a is a tapered cylindrical shaft, the diameter of one end of the shaft body a far away from the baffle is small, the diameter of one end of the shaft body a close to the baffle is large, and the diameter of the shaft body b is larger than that of the shaft body a; a stud is in threaded connection with the center of the shaft body b, and a gasket is mounted on the stud in a clearance fit manner; a gap is formed in the gasket, the gasket is arranged on the stud through the gap, and the center line of the gasket coincides with the center line of the stud; and a nut is in threaded connection with the stud on one side, far away from the shaft body b, of the gasket. According to the utility model, the product quality is ensured, and the processing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to an eccentric positioning device for vehicles, belonging to the field of machining technology. Background Technology

[0002] One type of part in artillery is the eccentric sleeve. This eccentric sleeve is an uncommon structure, and the part is thin-walled, making it prone to deformation during clamping. Traditional machining methods suffer from problems such as time-consuming alignment and difficult machining, resulting in high labor intensity for workers and affecting machining accuracy and efficiency. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides an eccentric positioning device for vehicles. This device overcomes the problems of time-consuming alignment and difficult processing in traditional processing methods, ensuring product quality, improving processing efficiency, and reducing the labor intensity of workers.

[0004] The technical solution adopted by this utility model to solve its technical problem is: an eccentric positioning device for vehicles, including an eccentric shaft, a washer, a nut and a stud, wherein the eccentric shaft includes a shaft body a, a baffle and a shaft body b, the baffle being located between shaft body a and shaft body b; a stud is threadedly connected to the center of shaft body b, and a circular washer is fitted on the stud with clearance fit; a nut is threadedly connected to the stud on the side of the washer away from shaft body b.

[0005] Furthermore, the centerline of shaft a and the centerline of shaft b are not on the same straight line, and the difference between the two centerlines is 0.5±0.015mm. The centerline of shaft a coincides with the centerline of the gasket.

[0006] Furthermore, the washer has a notch, through which it is mounted on the stud, with the center line of the washer coinciding with the center line of the stud.

[0007] Furthermore, shaft a is a tapered cylindrical shaft, with a smaller diameter at the end of shaft a furthest from the baffle and a larger diameter at the end of shaft a closest to the baffle.

[0008] Furthermore, the diameter of shaft b is larger than the diameter of shaft a.

[0009] Furthermore, shaft a, baffle and shaft b are an integral structure.

[0010] The beneficial effects of this utility model are as follows: This utility model overcomes the problems of time-consuming alignment and difficult processing in traditional processing methods, ensuring product quality, improving processing efficiency, reducing the labor intensity of workers, and providing a solid guarantee for the completion of production nodes. This automotive eccentric positioning device has the following three innovations: First, alignment is fast and accurate; second, it is easy to clamp, reducing labor intensity; and third, it simplifies complex problems and lowers the processing threshold.

[0011] This eccentric positioning device for automobiles has been widely used within the company and has been proven in practice. Compared with traditional processing methods, this device can effectively ensure the requirements of the drawings, reduce the scrap rate to almost zero, and greatly increase the company's economic benefits.

[0012] The eccentric positioning device used in this vehicle makes processing simple and quick, while ensuring good processing accuracy, improving work efficiency and quality, and the manufacturing cost is not high, resulting in good economic benefits. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model when clamping a workpiece.

[0015] Figure 2 This is a schematic diagram of the eccentric shaft of this utility model.

[0016] Figure 3 This is a front view of the gasket of this utility model.

[0017] Figure 4 yes Figure 3 Side view.

[0018] Figure 5 This is the front view of the workpiece.

[0019] Figure 6 yes Figure 5 Side view.

[0020] Numbering on the map:

[0021] 1. Eccentric shaft, 101. Shaft body a, 102. Baffle, 103. Shaft body b, 2. Washer, 201. Notch, 3. Nut, 4. Stud, 5. Workpiece. Detailed Implementation

[0022] like Figure 1As shown in Figure 6, an eccentric positioning device for vehicles includes an eccentric shaft 1, a washer 2, a nut 3, and a stud 4. The eccentric shaft 1 further includes a shaft body a101, a baffle 102, and a shaft body b103. The baffle 102 is located between shaft body a101 and shaft body b103. Shaft body a101, baffle 102, and shaft body b103 are an integral structure. The centerline of shaft body a101 and the centerline of shaft body b103 are not on the same straight line, and the difference between the two centerlines is 0.5 ± 0.015 mm. The centerline of shaft body a101 coincides with the centerline of washer 2. The shaft is a tapered cylindrical shaft. The end of shaft a101 away from baffle 102 has a smaller diameter, and the end of shaft a101 near baffle 102 has a larger diameter. The diameter of shaft b103 is larger than that of shaft a101. A stud 4 is threadedly connected to the center of shaft b103. A circular washer 2 is fitted on the stud 4 with clearance fit. The washer 2 has a notch 201. The washer 2 is mounted on the stud 4 through the notch 201. The center line of the washer 2 coincides with the center line of the stud 4. A nut 3 is threadedly connected to the stud 4 on the side of the washer 2 away from shaft b103.

[0023] During use, the shaft body a101 at the tail of the eccentric shaft 1 is a common part of the automotive mandrel and can be directly clamped on the lathe; the workpiece 5 is assembled with the shaft body b103 of the eccentric shaft 1 with clearance fit, and assembled together by the washer 2, nut 3 and stud, with the workpiece 5 located between the baffle 102 and the washer 2; the workpiece 5 is clamped together with the eccentric positioning device on the machine tool for machining.

[0024] To improve the machining accuracy and efficiency of workpiece 5, without affecting the production schedule, a special fixture is designed to ensure that workpiece 5 is subjected to uniform force during clamping and to prevent workpiece 5 from deforming. Under the condition of meeting the drawing requirements, the designed eccentric positioning device for automobiles should also be an eccentric fixture. The center lines of the two shafts a101 and b103 of the eccentric shaft 1 are not on the same straight line, and the difference between the two center lines is 0.5±0.015mm. That is, the eccentricity between the inner hole and the outer circle of the fixture is 0.5±0.015mm. The eccentricity between the inner hole and the outer circle is tightened according to the drawing.

Claims

1. An eccentric positioning device for vehicles, characterized in that: The device includes an eccentric shaft (1), a washer (2), a nut (3), and a stud (4). The eccentric shaft (1) includes a shaft body a (101), a baffle (102), and a shaft body b (103). The baffle (102) is located between the shaft body a (101) and the shaft body b (103). A stud (4) is threadedly connected to the center of the shaft body b (103). A circular washer (2) is fitted on the stud (4) with clearance fit. On the side of the washer (2) away from the shaft body b (103), a nut (3) is threadedly connected to the stud (4).

2. The vehicle eccentric positioning device according to claim 1, characterized in that: The centerline of shaft a (101) and the centerline of shaft b (103) are not on the same straight line. The difference between the two centerlines is 0.5±0.015mm. The centerline of shaft a (101) coincides with the centerline of shim (2).

3. The vehicle eccentric positioning device according to claim 1, characterized in that: The gasket (2) has a notch (201) and is mounted on the stud (4) through the notch (201). The center line of the gasket (2) coincides with the center line of the stud (4).

4. The vehicle eccentric positioning device according to claim 1, characterized in that: Shaft a (101) is a tapered cylindrical shaft. The end of shaft a (101) away from the baffle (102) has a smaller diameter, while the end of shaft a (101) close to the baffle (102) has a larger diameter.

5. The vehicle eccentric positioning device according to claim 1, characterized in that: The diameter of shaft b (103) is greater than the diameter of shaft a (101).

6. The vehicle eccentric positioning device according to claim 1, characterized in that: Shaft a (101), baffle (102) and shaft b (103) are an integral structure.

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