Brushless motor clamping jaw

Abstract

The utility model discloses a brushless motor clamping jaw which comprises a clamping jaw body, the clamping jaw body is an integral piece which is made of iron-based powder metallurgy materials through die casting by adopting a high-pressure die casting technology, and the clamping jaw body comprises a disc body with a center through hole formed in the center in a penetrating mode. Four claw bodies used for clamping connection are formed on the bottom face of the disc body in an equal-radian mode, a clamping groove is formed between every two adjacent claw bodies, and spline teeth are formed on the hole wall of the center through hole. The utility model has the advantages of low manufacturing cost, stable product molding size and high assembly precision.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a motor clamping claw used in a brushless motor of a BYD general-purpose vehicle C-EPS, specifically a brushless motor clamping claw. Background Art

[0002] In the prior art, the claws used in traditional brushless motors are all made by machining. The claws made by machining have low production efficiency, high processing difficulty, and unstable dimensions, which leads to high scrap rate and high production cost. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a brushless motor clamping claw with low manufacturing cost, stable product molding size and high assembly precision in response to the above-mentioned existing technical status.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] A brushless motor clamp includes a clamp body, which is an integral part die-casted from iron-based powder metallurgy material using a high-pressure die-casting process. The clamp body includes a disk body with a central through-hole formed through the center. Four clamp bodies for clamping and connecting are formed on the bottom surface of the disk body with equal arcs. A clamping groove is formed between two adjacent clamp bodies, and spline teeth are formed on the hole wall of the central through-hole.

[0006] To optimize the above technical solutions, the following measures are also taken:

[0007] The cross section of the claw body is a cone with a taper angle of 45°, and one end of the smallest tapered surface of the claw body points to the axis of the central through hole.

[0008] A circle of annular positioning groove is formed around the top surface of the disk body, and the cross section of the annular positioning groove is L-shaped.

[0009] The port of the central through hole is expanded to provide a tapered introduction port for facilitating the introduction and installation of the spline shaft, and the tapered introduction port has an introduction inclination angle of 40°.

[0010] Compared to existing technology, the jaw body of this utility model is a single-piece component die-casted from iron-based powder metallurgy using a high-pressure die-casting process. This iron-based powder-molded jaw body offers stable dimensions, low manufacturing costs, and high assembly precision. The jaw body comprises a disc and four claws molded around its bottom surface. A slot is formed between adjacent claws, and spline teeth are located in the central through-hole of the disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 yes Figure 1 AA section view. DETAILED DESCRIPTION

[0013] The embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

[0014] Figures 1 to 2 It is a structural diagram of the present utility model.

[0015] The reference numerals are: claw body 1 , disc body 2 , central through hole 2 a , tapered inlet 2 b , claw body 3 , clamping groove 4 , spline teeth 5 , annular positioning groove 6 .

[0016] like Figures 1 to 2 As shown, the utility model discloses a brushless motor claw, which is used in the C-EPS brushless motor of BYD general-purpose vehicle models. It includes a claw body 1, which is an integral part die-casted by an iron-based powder metallurgy material using a high-pressure die-casting process. The claw body 1 formed by the iron-based powder metallurgy material has low manufacturing cost and high mechanical strength, especially good product molding dimensional stability. The claw body 1 includes a disc body 2 and four claw bodies 3 integrally formed at the periphery of the bottom surface of the disc body 2. The four claw bodies 3 are distributed in equal arcs on the disc body 2, and two adjacent claw bodies 3 are formed with a slot 4. The slot 4 and the claw 3 form a convex-concave connection structure that can be used to connect with other components of the brushless motor. The diameter of the disc body 2 is 30 mm, and a 9.9 mm center through hole 2a is formed in the center thereof, and spline teeth 5 are formed on the hole wall of the center through hole 2a, thereby forming a spline shaft hole that can be connected to the spline shaft drive, so that the entire claw body 1 is driven to rotate by driving the spline shaft.

[0017] In the embodiment Figure 1 As shown, the cross-section of the claw 3 of the present invention is conical with a 45° taper angle. The end of the smallest tapered surface of the claw 3 points toward the axis of the central through hole 2a. The smallest tapered surfaces of the four claws 3 lie on the circumference of a circle with a diameter of 18 mm. The height of the claw 3 on the disc 2 is 7 mm, and the height of the entire claw body 1 is 16.2 mm.

[0018] In the embodiment, Figure 2 As can be seen, the top surface of the disk body 2 is formed with an annular positioning groove 6, which has an L-shaped cross-section. The groove 6 is 3 mm deep and forms a raised ring on the top surface of the disk body 2, surrounding the central through hole 2a. The diameter of the raised ring is 20.4 mm.

[0019] In the embodiment Figure 2As shown, the utility model has a tapered introduction port 2b at the upper end of the central through hole 2a, which is enlarged to facilitate the introduction and installation of the spline shaft. The tapered introduction port 2b has an introduction inclination angle of 40°.

[0020] The best embodiment of the present invention has been described, and various changes or modifications made by ordinary technicians in this field will not depart from the scope of the present invention.

Claims

1. A brushless motor claw, comprising a claw body (1), characterized in that: The clamping claw body (1) is an integral part formed by high-pressure die-casting process using iron-based powder metallurgy material. The clamping claw body (1) includes a disc body (2) with a central through hole (2a) formed through the center. Four claw bodies (3) for clamping and connecting are formed in equal arcs on the bottom surface of the disc body (2). A clamping groove (4) is formed between two adjacent claw bodies (3). Spline teeth (5) are formed on the hole wall of the central through hole (2a).

2. The brushless motor claw according to claim 1, characterized in that: The cross section of the claw body (3) is a cone with a taper angle of 45°, and one end of the smallest taper surface of the claw body (3) points to the axis of the central through hole (2a).

3. The brushless motor claw according to claim 2, characterized in that: A circle of annular positioning grooves (6) are formed around the periphery of the top surface of the disk body (2), and the cross section of the annular positioning grooves (6) is L-shaped.

4. The brushless motor claw according to claim 2, characterized in that: The upper end of the central through hole (2a) is enlarged to provide a tapered introduction port (2b) for facilitating the introduction and installation of the spline shaft, and the tapered introduction port (2b) has an introduction inclination angle of 40°.

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