Stepping motor stator assembly and stepping motor with same

Abstract

The utility model relates to a stepping motor stator assembly and a stepping motor with the same, the stator assembly comprises a front stator, a mounting plate and a rear stator, the front stator and the rear stator are respectively connected with the mounting plate, the front stator and the rear stator are both provided with stator small teeth, and the mounting plate is not provided with stator small teeth. Compared with the prior art, the motor has the advantages that the motor structure is compact, the area of a winding space is increased, the output torque of the motor is improved, and the like.

Description

Technical Field

[0001] The utility model relates to a stepping motor, in particular to a stepping motor stator component and a stepping motor with the stator component. Background Art

[0002] A stepper motor is an open-loop control element that converts electrical pulse signals into angular displacement or linear displacement. It is a device that converts electrical energy into mechanical motion. It moves at a certain step angle and is usually used in applications that require high-precision position control.

[0003] After searching the Chinese patent publication number CN220628966U, a new type of high-precision hybrid stepper motor is disclosed, which specifically discloses a stator and a rotor. The stator adopts a circular design, the stator is evenly distributed with 18 poles and each pole is evenly distributed with 15 teeth. The outer periphery of the rotor is evenly distributed with 300 teeth. The rotor is located in the middle of the stator. When the stator and the rotor cooperate with each other, the motor has a high-precision positioning accuracy of 0.2°. However, the stator of the existing stepper motor generally cannot change its length, so it is impossible to adjust the installation position, and there are also problems such as large size and low output torque. Utility Model Content

[0004] The purpose of the utility model is to provide a stepper motor stator assembly and a stepper motor having the stator assembly in order to overcome the defects of the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] According to one aspect of the utility model, a stepper motor stator assembly is provided, the stator assembly comprising a front stator, a mounting plate and a rear stator, the front stator and the rear stator being respectively connected to the mounting plate, the front stator and the rear stator being both provided with stator teeth, and the mounting plate being free of stator teeth.

[0007] As a preferred technical solution, the front stator and the rear stator are both stators formed by rotating and riveting punching sheets, and the mounting plate is a mounting plate stamped from a magnetic conductive material.

[0008] As a preferred technical solution, the front stator and the rear stator are respectively connected to the mounting plate by laser welding.

[0009] As a preferred technical solution, the stator outer diameter d5 of the front stator and the rear stator is equal to the outer diameter d2 of the mounting plate.

[0010] As a preferred technical solution, the relationship between the inner diameter d3 of the stator teeth and the inner diameter d4 of the stator teeth shoe of the front stator and the rear stator and the inner diameter d1 of the mounting plate is as follows: d3≤d1≤d4.

[0011] As a preferred technical solution, circles are drawn with the outer diameter d5 of the stator and the inner diameter d4 of the small tooth shoe as diameters, and the cross section of the mounting plate within the circular ring formed by the two circles is completely the same as the cross section of the front stator and the rear stator.

[0012] As a preferred technical solution, the thickness of the mounting plate is greater than or equal to 1 mm.

[0013] According to another aspect of the utility model, a stepper motor with a stator assembly is provided, wherein the stepper motor comprises a front end cover, a front insulating frame, a rear insulating frame and a rear end cover, and the stepper motor also comprises the stator assembly.

[0014] As a preferred technical solution, the stepper motor further includes rivets, which connect the front end cover, the stator assembly and the rear end cover.

[0015] As a preferred technical solution, the front insulating frame and the rear insulating frame are embedded in the slots of the stator assembly.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1) The utility model divides the stator assembly into three parts. The installation position can be adjusted by changing the length of the front stator and the rear stator, which greatly improves the installation convenience. At the same time, the motor volume can be reduced to the maximum extent without the need for an outer casing, thereby making the motor structure compact;

[0018] 2) The utility model uses rivet connection instead of conventional screw connection to reduce the area of ​​the mounting hole, which is beneficial to increase the area of ​​the winding space and thus improve the output torque of the motor;

[0019] 3) The utility model has no redundant parts except the motor structure, and the motor body has a large space for utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the motor of the utility model;

[0021] Figure 2 It is a schematic cross-sectional view of the mounting plate of the utility model;

[0022] Figure 3 It is a schematic diagram of the front and rear stator cross-sections of the utility model;

[0023] Among them, 1 is the front cover, 2 is the front insulation frame, 3 is the stator assembly, 4 is the rear insulation frame, 5 is the rear cover, 6 is the rivet, 8 is the mounting hole, 9 is the front stator, 10 is the mounting plate, 11 is the rear stator, 12 is the stator tooth, 13 is the customer installation hole, S is the mounting hole area, S1 is the winding space area, d1 is the inner diameter of the mounting plate, d2 is the outer diameter of the mounting plate, d3 is the inner diameter of the stator tooth, d4 is the inner diameter of the tooth shoe, and d5 is the outer diameter of the stator. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0025] Example 1

[0026] like Figure 1 As shown, a stepper motor stator assembly, the stator assembly 3 includes a front stator 9, a mounting plate 10 and a rear stator 11, the front stator 9 and the rear stator 11 are respectively connected to the mounting plate 10, the front stator 9 and the rear stator 11 are both provided with stator teeth 12, and the mounting plate 10 has no stator teeth 12.

[0027] The front stator 9 and the rear stator 11 are both stators formed by rotating and riveting punching sheets, and the mounting plate 10 is a mounting plate stamped from a magnetic conductive material, and the thickness of the mounting plate 10 is greater than or equal to 1 mm. The front stator 9, the mounting plate 10 and the rear stator 11 are connected by laser welding. After the connection is completed, the front insulation frame 2 and the rear insulation frame 4 are embedded in the slot of the stator assembly 3 to isolate the copper wire winding and the stator assembly 3. After the winding is completed, the front cover 1, the stator assembly 3 and the rear cover 5 are connected using rivets 6, and then installed through the customer installation holes 13 on the mounting plate 10.

[0028] like Figure 2 and Figure 3 As shown, the stator outer diameter d5 of the front stator 9 and the rear stator 11 is equal to the outer diameter d2 of the mounting plate. The relationship between the inner diameter d3 of the stator teeth and the inner diameter d4 of the small tooth shoe of the front stator 9 and the rear stator 11 and the inner diameter d1 of the mounting plate 10 is as follows: d3≤d1≤d4. Circles are drawn with the stator outer diameter d5 and the small tooth shoe inner diameter d4 as diameters, and the cross section of the mounting plate 10 within the range of the circular ring formed by the two circles is exactly the same as the cross section of the front stator 9 and the rear stator 11.

[0029] The installation position can be adjusted by changing the length of the front stator 9 and the rear stator 11. Without the need for an outer casing, the space volume requirement can be used for the design of the motor body to the maximum extent, and the structure is compact and the motor output torque is larger. Using rivet connection instead of conventional screw connection can reduce the installation hole area S, which is conducive to increasing the winding space area S1 and thus improving the output torque of the motor.

[0030] Example 2

[0031] like Figure 1As shown, a stepper motor with a stator assembly comprises a front end cover 1, a front insulating frame 2, a rear insulating frame 4 and a rear end cover 5. The stepper motor also comprises the stator assembly 3 described in Example 1.

[0032] Furthermore, the stepper motor also includes a rivet 6 , which connects the front cover 1 , the stator assembly 3 and the rear cover 5 .

[0033] After the stator assembly 3 is installed, the front insulating frame 2 and the rear insulating frame 4 are embedded in the groove of the stator assembly 3 to isolate the copper wire winding and the stator assembly 3. After the winding is completed, the front cover 1, the stator assembly 3 and the rear cover 5 are connected with rivets 6, and then installed through the customer installation holes 13 on the mounting plate 10.

[0034] This embodiment has no redundant parts except the motor structure, and the motor body has a large space for utilization. The use of rivets instead of screws is beneficial to increasing the area of ​​the winding space and improving the output torque of the motor.

[0035] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A stepper motor stator assembly, characterized in that: The stator assembly (3) comprises a front stator (9), a mounting plate (10) and a rear stator (11); the front stator (9) and the rear stator (11) are respectively connected to the mounting plate (10); the front stator (9) and the rear stator (11) are both provided with stator teeth (12); and the mounting plate (10) is free of stator teeth (12).

2. A stepper motor stator assembly according to claim 1, characterized in that: The front stator (9) and the rear stator (11) are both stators formed by rotating and riveting punching sheets, and the mounting plate (10) is a mounting plate formed by stamping a magnetic conductive material.

3. A stepper motor stator assembly according to claim 1, characterized in that: The front stator (9) and the rear stator (11) are respectively connected to the mounting plate (10) by laser welding.

4. A stepper motor stator assembly according to claim 1, characterized in that: The stator outer diameter d5 of the front stator (9) and the rear stator (11) is equal to the outer diameter d2 of the mounting plate (10).

5. A stepper motor stator assembly according to claim 4, characterized in that: The relationship between the inner diameter d3 of the stator teeth and the inner diameter d4 of the teeth shoe of the front stator (9) and the rear stator (11) and the inner diameter d1 of the mounting plate (10) is as follows: d3≤d1≤d4.

6. A stepper motor stator assembly according to claim 5, characterized in that: Circles are drawn with the outer diameter d5 of the stator and the inner diameter d4 of the small tooth shoe as diameters. The cross section of the mounting plate (10) within the circular ring formed by the two circles is completely the same as the cross section of the front stator (9) and the rear stator (11).

7. A stepper motor stator assembly according to claim 1, characterized in that: The thickness of the mounting plate (10) is greater than or equal to 1 mm.

8. A stepper motor with a stator assembly, the stepper motor comprising a front end cover (1), a front insulating frame (2), a rear insulating frame (4) and a rear end cover (5), characterized in that: The stepper motor further comprises a stator assembly (3) as claimed in any one of claims 1 to 7.

9. A stepper motor with a stator assembly according to claim 8, characterized in that: The stepper motor further comprises a rivet (6), wherein the rivet (6) connects the front end cover (1), the stator assembly (3) and the rear end cover (5).

10. A stepper motor with a stator assembly according to claim 8, characterized in that: The front insulating frame (2) and the rear insulating frame (4) are embedded in the slots of the stator assembly (3).

Images