Cost reducing structure of active stabilizer bar motor

Abstract

The utility model discloses a cost reducing structure of an active stabilizer bar motor. The cost reducing structure comprises an outer cylinder, a front end cover, a rear end cover, a stator assembly and a rotor assembly. A limiting step is formed in the middle of the inner wall of the outer cylinder, the front end cover is pressed into the outer cylinder and abuts against the limiting step for limiting, the stator assembly is pressed into the outer cylinder and abuts against the front end cover, the rear end cover is pressed into the outer cylinder, and the periphery of the rear end cover is welded to the outer cylinder. The rotor assembly is assembled in the center of the stator assembly, and the two ends of the rotor assembly are in positioning fit with the front end cover and the rear end cover respectively. According to the utility model, a motor casing is canceled, and the end cover in the motor and each assembly are directly matched with the outer cylinder, so that the concentricity can be effectively ensured while the cost is saved, the motor is not easy to loosen, and the stability is higher.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a cost-reducing structure for an active stabilizer bar motor. Background Technology

[0002] Currently, the motors used for active stabilizer bars are assembled by pressing the entire motor into the outer cylinder of the assembly. The motor is relatively long, which makes the mold opening of the motor housing more difficult and the unit cost more expensive. The interference fit between the housing and the outer cylinder is concentrated at the tail end, which may cause the motor head to be misaligned and wobble. In addition, the only interference fit method may lead to loosening later. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a cost-reducing structure for an active stabilizer bar motor. It directly fits the motor's internal end cover and various assemblies with the outer cylinder, saving costs while effectively ensuring concentricity and higher stability.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A cost-reducing structure for an active stabilizer bar motor includes an outer cylinder, a front end cover, a rear end cover, a stator assembly, and a rotor assembly.

[0006] A limiting step is formed in the middle of the inner wall of the outer cylinder. The front end cover is pressed into the outer cylinder and abuts against the limiting step. The stator assembly is pressed into the outer cylinder and abuts against the front end cover. The rear end cover is pressed into the outer cylinder and welded to the outer cylinder around its perimeter.

[0007] The rotor assembly is assembled in the center of the stator assembly, and both ends of the rotor assembly are positioned and fitted with the front cover and the rear cover, respectively.

[0008] Furthermore, the rotor assembly includes a motor shaft and a first bearing and a second bearing installed at the front and rear ends of the motor shaft. The first bearing is positioned and assembled with the front end cover, and the second bearing is positioned and assembled with the rear end cover.

[0009] Furthermore, the front end cover has a first positioning cavity in the center suitable for positioning and installing the first bearing, and the rear end cover has a second positioning cavity in the center suitable for positioning and installing the second bearing.

[0010] Furthermore, a wave-shaped washer is also provided inside the second positioning cavity.

[0011] Furthermore, the rear end cover is made of the same material as the outer cylinder, and the rear end cover is fixed to the inner wall of the outer cylinder by laser welding.

[0012] By adopting the above technical solution, this utility model has the following beneficial effects:

[0013] 1. This utility model eliminates the motor housing, directly fitting the internal end covers and assemblies of the motor to the outer cylinder, saving costs while effectively ensuring concentricity. Specifically, the front end cover, stator assembly, and rear end cover are sequentially pressed into the outer cylinder. The front end cover is held and limited by a limiting step, the stator assembly abuts against the front end cover, and the rear end cover is welded and fixed to the outer cylinder around its perimeter. This effectively prevents end cover displacement failure, ensures assembly stability, prevents loosening, and extends its service life.

[0014] 2. This utility model uses the first and second bearings at both ends of the rotor assembly to limit the positioning cavities on the front and rear covers, respectively, which can further improve the concentricity of the mechanism assembly. At the same time, the support of the first and second bearings by the front and rear covers can improve the stability of the mechanism assembly and prevent it from loosening. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall assembly structure of this utility model;

[0016] Figure 2 This is a cross-sectional three-dimensional structural diagram of the present invention;

[0017] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 4 This is a schematic diagram of the front cover of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the rear end cover of this utility model;

[0020] Among them, 1. outer cylinder; 100. limiting step; 2. front end cover; 20. first positioning cavity; 3. rear end cover; 30. second positioning cavity; 4. stator assembly; 5. rotor assembly; 50. motor shaft; 51. first bearing; 52. second bearing; 6. wave washer. Detailed Implementation

[0021] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] like Figure 1-5As shown, this embodiment provides a cost-reducing structure for an active stabilizer bar motor, which mainly consists of an outer cylinder 1, a front end cover 2, a rear end cover 3, a stator assembly 4, and a rotor assembly 5. The outer cylinder 1 has a long cylindrical structure. Conventional active stabilizer bar motors are assembled as a whole and then pressed into the outer cylinder, requiring a motor housing. However, the motor housing itself is difficult to mold, resulting in high unit costs. Furthermore, the interference fit between the housing and the outer cylinder is concentrated at the rear, which may cause misalignment and wobbling at the motor head, leading to loosening and other problems later on.

[0023] Therefore, in this embodiment, the motor housing is eliminated. Specifically, a limiting step 100 is formed in the middle of the inner wall of the outer cylinder 1. The front cover 2 is press-fitted into the outer cylinder 1 and abuts against the limiting step 100. The stator assembly 4 is press-fitted into the outer cylinder 1 and abuts against the front cover 2. The rear cover 3 is press-fitted into the outer cylinder 1 and welded to the outer cylinder 1 around its circumference. At the same time, the rotor assembly 5 is assembled in the center of the stator assembly 4, and both ends of the rotor assembly 5 are respectively positioned and fitted with the front cover 2 and the rear cover 3. The rotor assembly 5 specifically includes a motor shaft 50 and a first bearing 51 and a second bearing 52 installed at the front and rear ends of the motor shaft 50. The first bearing 51 is positioned and fitted with the front cover 2, and the second bearing 52 is positioned and fitted with the rear cover 3. In this embodiment, the motor housing is eliminated, and the internal end cover and various assemblies of the motor are directly fitted to the outer cylinder 1. This saves costs while effectively ensuring concentricity. The front end cover 2, stator assembly 4 and rear end cover 3 are sequentially pressed into the outer cylinder 1. The front end cover 2 is held and limited by the limiting step 100, the stator assembly 4 abuts against the front end cover 2, and the rear end cover 3 is welded and fixed to the outer cylinder 1 around its perimeter. This effectively prevents the end cover from shifting and failing, ensures the stability of the assembly, and prevents it from loosening.

[0024] To achieve better positioning and concentricity, this embodiment has a first positioning cavity 20 in the center of the front cover 2, suitable for positioning and installing the first bearing 51, and a second positioning cavity 30 in the center of the rear cover 3, suitable for positioning and installing the second bearing 52. The motor shaft 50 passes through the front cover 2 and the rear cover 3, and is supported and limited by the first bearing 51 and the second bearing 52. Therefore, by limiting the installation of the first bearing 51 and the second bearing 52 at both ends of the rotor assembly 5 with the positioning cavities on the front cover 2 and the rear cover 3 respectively, the concentricity of the mechanism assembly can be further improved. At the same time, the support of the first bearing 51 and the second bearing 52 by the front cover 2 and the rear cover 3 can improve the stability of the mechanism assembly and prevent it from loosening.

[0025] In this embodiment, during assembly, the front end cover 2 is first pressed into the outer cylinder 1 and abuts against the limiting step 100 for limiting; then, the stator assembly 4 and rotor assembly 5 are pressed into the assembly structure, so that the end face of the stator assembly 4 abuts against the front end cover 2, and at the same time, the first bearing 51 of the stator assembly 4 is installed and limited with the first positioning cavity 20; then, the rear end cover 3 is pressed into the outer cylinder 1, so that the second bearing 52 of the stator assembly 4 is installed and limited with the second positioning cavity 30; finally, after pressing, the rear end cover 3 is laser welded around its perimeter to complete the assembly process. This method results in higher concentricity and stability during installation.

[0026] In addition, to prevent the motor shaft and bearings from being too rigid during installation and operation, a wave washer 6 is provided in the second positioning cavity 30 in this embodiment, which can play a certain buffering role.

[0027] Finally, in order to improve the welding strength between the rear end cover 3 and the outer cylinder 1, the rear end cover 3 and the outer cylinder 1 in this embodiment can be made of the same material, and the rear end cover 3 is fixed to the inner wall of the outer cylinder 1 by laser welding, so that the welding and fixing effect is better.

[0028] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] The above specific embodiments further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cost-reducing structure of an active stabilizer bar motor, characterized by: It comprises an outer cylinder (1), a front end cover (2), a rear end cover (3), a stator assembly (4) and a rotor assembly (5); A shaped limiting step (100) is formed in the middle of the inner wall of the outer cylinder (1), the front end cover (2) is press-fitted into the outer cylinder (1) and abuts against the limiting step (100), the stator assembly (4) is press-fitted into the outer cylinder (1) and abuts against the front end cover (2), and the rear end cover (3) is press-fitted into the outer cylinder (1) and is welded with the outer cylinder (1) around the periphery. The rotor assembly (5) is assembled in the center of the stator assembly (4), and the two ends of the rotor assembly (5) are positioned and matched with the front end cover (2) and the rear end cover (3) respectively.

2. The cost-reducing structure of an active stabilizer bar motor according to claim 1, characterized by: The rotor assembly (5) comprises a motor shaft (50) and first and second bearings (51 and 52) installed at the front and rear ends of the motor shaft (50), the first bearing (51) is positioned and assembled with the front end cover (2), and the second bearing (52) is positioned and assembled with the rear end cover (3).

3. The cost-reducing structure of an active stabilizer bar motor according to claim 2, characterized in that: A first positioning cavity (20) suitable for positioning and installing the first bearing (51) is formed in the center of the front end cover (2), and a second positioning cavity (30) suitable for positioning and installing the second bearing (52) is formed in the center of the rear end cover (3).

4. The cost-reducing structure of an active stabilizer bar motor according to claim 3, characterized in that: A wave washer (6) is further arranged in the second positioning cavity (30).

5. The cost-reducing structure of an active stabilizer bar motor according to claim 1, characterized by: The rear end cover (3) is made of the same material as the outer cylinder (1), and the rear end cover (3) is fixed with the inner wall of the outer cylinder (1) by laser welding.

Images