Fixing structure of automobile electromagnetic clutch hub

Abstract

The utility model discloses a fixing structure of an automobile electromagnetic clutch hub, comprising a plug-in hole arranged in the middle of the hub, a fixing block arranged at the front end of the plug-in hole, a plurality of protruding abutment blocks arranged on the peripheral wall of the fixing block, an embedding hole arranged on the inner wall of the plug-in hole, the abutment blocks protrude from the inside to the outside and are fixed to the embedding hole by interference fit. The utility model has the following advantages and effects: by arranging an interference fit structure between the fixing block and the hub, the fixing block can be firmly clamped, avoiding the problem of loosening due to reduced firmness after a certain period of use.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic clutches, in particular to a fixing structure of an automobile electromagnetic clutch hub. Background Art

[0002] The automobile electromagnetic clutch is mainly composed of a pulley, a drive assembly, and a wire assembly, wherein the drive assembly is fixed to the main shaft of the air-conditioning compressor through a hub spline.

[0003] Automobile air conditioning electromagnetic clutches are conventionally provided with a plug-in hole on the wheel hub, a fixed block with a threaded hole is placed at the front end of the plug-in hole, and the wheel hub part around the plug-in hole is punched so that the punched part clamps the fixed block. The spindle is inserted into the plug-in hole from the rear side, and a screw is provided at the front end of the plug-in hole, which passes through the fixed block and penetrates into the spindle for fixing.

[0004] In this part, long-term use will generate inward and outward thrusts on the fixed block, thereby affecting the firmness of the stamping part and reducing the reliability of the screw fixing the main shaft. Utility Model Content

[0005] The utility model aims to provide a fixing structure for an automobile electromagnetic clutch hub.

[0006] The above technical purpose of the utility model is achieved through the following technical scheme: the fixing structure of the automobile electromagnetic clutch hub includes a plug-in hole arranged in the middle of the hub, a fixing block is arranged at the front end of the plug-in hole, a plurality of protruding abutment blocks are arranged on the peripheral wall of the fixing block, an embedding hole is arranged on the inner wall of the plug-in hole, the abutment block protrudes from the inside to the outside to the peripheral side, and the abutment block is fixed with the embedding hole by interference fit.

[0007] It is further configured as follows: the abutment block includes an outwardly extending extension portion, an oblique groove is provided on the peripheral wall of the fixed block body and is inside the extension portion, a sphere is slidably provided in the oblique groove, a plurality of vertical rods are provided on the hub and are located around the plug-in hole, a through hole is provided on the extension portion, and the vertical rods pass through the through hole and abut against the bottom of the sphere.

[0008] It is further configured that: an inner recess is provided on the inner wall of the front end of the extension portion.

[0009] It is further configured that: the embedding hole is arranged obliquely.

[0010] It is further configured as follows: a semicircular arc edge is provided on the inner edge of the upper end of the embedding hole.

[0011] In summary, the utility model has the following beneficial effects: by providing an interference fit structure between the fixed block and the wheel hub, the fixed block can be firmly clamped, thereby preventing the problem of reduced firmness and loosening after a certain period of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of a fixed structure;

[0013] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0014] Figure 3 for Figure 1 Enlarged view of point B in the middle.

[0015] In the figure: 1, plug-in hole; 2, fixed block; 3, abutment block; 4, embedding hole; 5, extension part; 6, inclined groove; 7, sphere; 8, vertical rod; 9, through hole; 10, inner recess; 11, arc edge; 12, wheel hub. DETAILED DESCRIPTION

[0016] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0017] The fixing structure of the automobile electromagnetic clutch hub 12 includes a plug-in hole 1 arranged in the middle of the hub 12, a fixing block 2 is arranged at the front end of the plug-in hole 1, and a threaded hole is arranged in the middle of the fixing block 2. A plurality of embedded holes 4 are arranged on the inner wall of the plug-in hole 1, and a resistance block 3 which is interference-fitted with the embedded holes 4 is arranged on the side wall of the fixing block 2. After the resistance block 3 is installed, it protrudes from the inside to the outside and the circumference, so as to prevent the fixing block 2 from being squeezed outward.

[0018] The abutment block 3 includes an outward extension 5, which is inclined, and the embedding hole 4 is also inclined. The peripheral wall of the fixed block 2 is provided with an inclined groove 6 inside the extension 5, and the hub 12 is provided with a plurality of vertical rods 8 around the plug-in hole 1. The extension 5 is provided with a through hole 9, and the vertical rod 8 abuts against the bottom of the ball 7 after passing through the through hole 9. Thus, the ball 7 can be pushed forward and upward. Since the original position of the ball 7 is the inclined inclined groove 6, it will squeeze the extension 5 after being pushed upward, and make the extension 5 expand outward. As the fixed block 2 is inserted, the extension 5 finally extends into the embedding hole 4, so as to achieve reliable fixation of the fixed block 2.

[0019] An inner recess 10 is provided on the inner wall of the front end of the extension portion 5, and the inner recess 10 can allow the ball 7 to be embedded, and has a certain hooking effect on the ball 7. At the same time, a semicircular arc edge 11 is provided on the inner edge of the upper end of the embedding hole 4, and the arc edge 11 can fit the ball 7 to ensure the stability of the ball 7 after installation. The inner recess 10 and the arc edge 11 cooperate with each other, which can make the ball 7 more stable and reliable after installation.

[0020] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A fixing structure of an automobile electromagnetic clutch hub, comprising a plug-in hole arranged in the middle of the hub, characterized in that: A fixed block is arranged at the front end of the plug hole, a plurality of protruding abutment blocks are arranged on the peripheral wall of the fixed block, an embedding hole is arranged on the inner wall of the plug hole, the abutment block protrudes from the inside to the outside and is fixed with the embedding hole by interference fit.

2. The fixing structure of the automobile electromagnetic clutch hub according to claim 1 is characterized in that: The abutment block comprises an outwardly extending extension portion, a peripheral wall of the fixed block body is provided with an oblique groove inside the extension portion, a sphere is slidably arranged in the oblique groove, a plurality of vertical rods are arranged on the hub around the plug-in hole, a through hole is provided on the extension portion, and the vertical rods abut under the sphere after passing through the through hole.

3. The fixing structure of the automobile electromagnetic clutch hub according to claim 2 is characterized in that: An inner notch is arranged on the inner wall of the front end of the extension part.

4. The fixing structure of the automobile electromagnetic clutch hub according to claim 1 is characterized in that: The embedding hole is arranged obliquely.

5. The fixing structure of the automobile electromagnetic clutch hub according to claim 1 is characterized in that: The inner edge of the upper end of the embedding hole is provided with a semicircular arc edge.

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