A central axis structure

Abstract

The utility model relates to a central axis structure, comprising a hollow shaft rod main body, arc grooves are arranged at the front end and the rear end of the shaft rod main body, the arc grooves are evenly distributed along the circumference, an involute spline is arranged near the front end of the shaft rod main body, a third notch is arranged on the front side of the involute spline, a tool retreat groove is arranged on the rear side of the involute spline, a convex ridge is arranged adjacent to the tool retreat groove, a second notch is arranged in the middle section of the shaft rod, and nickel-plated layers are arranged on the surfaces of the front end and the rear end. The utility model designs a novel central axis structure, annularly distributed arc grooves are arranged at the front end and the rear end, the surface of which has a hardened layer, and the end of which has a nickel-plated layer, which can play an anti-oxidation role.

Description

Technical Field

[0001] The utility model relates to the technical field of isolator parts, in particular to a central shaft structure. Background Art

[0002] One-way devices are widely used in the automotive industry. For example, a one-way device is installed in the starting device of a car. It is a relatively mature product in the existing technology and is a device that transmits the power of the car engine to the axle in the form of a switch.

[0003] As a one-way device processing technology enterprise, our company has designed various types of structures. For example, on March 22, 2021, we applied for "A wear-resistant one-way device rotating shaft", and on August 9, 2022, we designed "A one-way device hollow drive shaft". We designed a completely different shaft structure and specially applied for this invention. Utility Model Content

[0004] In order to solve the above-mentioned problems in the prior art, the utility model provides a central axis structure, which can improve the above-mentioned deficiencies.

[0005] The utility model relates to a central axis structure, comprising a hollow shaft rod main body, arc grooves are arranged at the front end and the rear end of the shaft rod main body, the arc grooves are evenly distributed along the circumference, an involute spline is arranged near the front end of the shaft rod main body, a third notch is arranged on the front side of the involute spline, a tool retreat groove is arranged on the rear side of the involute spline, a convex ridge is arranged at a position adjacent to the tool retreat groove, a second notch is arranged in the middle section of the shaft rod, and nickel plating is arranged on the surfaces of the front end and the rear end.

[0006] Furthermore, the diameter of the arc groove is 6 mm.

[0007] Furthermore, the hardness of the shaft rod body is HRC45-50.

[0008] Furthermore, the outer diameters of the two ends of the shaft body are designed to increase in steps toward the ridges.

[0009] Furthermore, a hardened layer is arranged in the middle of the shaft body.

[0010] Furthermore, the inner diameters at both ends of the inner cavity of the shaft body are larger than the inner diameter in the middle.

[0011] The utility model designs a novel central axis structure. The front end and the rear end are both provided with circumferentially distributed arc grooves. The surface of the central axis structure has a hardened layer, and the end of the central axis structure has a nickel-plated layer, which can play an anti-oxidation role. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the utility model.

[0013] Figure 2 It is a cross-sectional view of the utility model.

[0014] Figure 3 It is a schematic diagram of the terminal structure.

[0015] Illustration: 1 shaft rod body, 10 shaft hole, 101 hardened layer, 102 nickel-plated layer, 2 involute spline, 3 first notch, 4 front end, 41 arc groove, 5 convex ridge, 6 back cutter groove, 7 second notch, 8 rear end, 9 third notch. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0017] like Figure 1-3 As shown, the utility model relates to a central axis structure, including a hollow shaft body 1, which is 142mm in length and 14mm in diameter of the inner cavity of the shaft body. The front end 4 and the rear end 8 of the shaft body are both provided with arc grooves 41, and the arc grooves are evenly distributed along the circumference. An involute spline 2 is provided near the front end of the shaft body, a third notch 9 is provided on the front side of the involute spline, a back-off groove 6 is provided on the rear side of the involute spline, and a convex ridge 5 is provided adjacent to the back-off groove. A second notch 7 is provided in the middle section of the shaft, and the second notch is a place for fixing the rubber ring, which can be used as an installation point for the sealing ring. The front end and rear end surfaces are both provided with a nickel-plated layer 102 treated by an ENP chemical nickel plating process.

[0018] As a technical improvement, the diameter of the arc groove is 6 mm.

[0019] As a technical improvement, the hardness of the shaft rod body is HRC45-50.

[0020] As a technical improvement, the outer diameter of the two ends of the shaft body is designed to increase in steps toward the ridges.

[0021] As a technical improvement, a hardened layer 101 is provided in the middle of the shaft body, and the hardened layer is a surface treated by QPQ salt bath composite treatment technology.

[0022] As a technical improvement, the inner diameters at both ends of the inner cavity of the shaft body are larger than the inner diameter in the middle.

[0023] The shaft rod of this design has arc grooves at both ends and an annular design, which makes it more stable during operation.

Claims

1. A central axis structure, characterized in that: It includes a hollow shaft body, the front and rear ends of the shaft body are both provided with arc grooves, the arc grooves are evenly distributed along the circumference, an involute spline is provided near the front end of the shaft body, a third notch is provided on the front side of the involute spline, a tool retreat groove is provided on the rear side of the involute spline, a convex ridge is provided adjacent to the tool retreat groove, a second notch is provided in the middle section of the shaft, and nickel plating is provided on the front and rear end surfaces.

2. A central axis structure according to claim 1, characterized in that: The diameter of the arc groove is 6 mm.

3. A central axis structure according to claim 1, characterized in that: The hardness of the shaft rod body is HRC45-50.

4. A central axis structure according to claim 1, characterized in that: The outer diameters of the two ends of the shaft rod body are designed to increase in steps toward the ridges.

5. The central axis structure according to claim 1, characterized in that: A hardened layer is arranged in the middle of the shaft rod body.

6. The central axis structure according to claim 1, characterized in that: The inner diameters at both ends of the inner cavity of the shaft body are larger than the inner diameter in the middle.

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