An axially adjustable disc type stepper motor

Abstract

The utility model discloses an axial adjustment's disc type stepping motor, include: motor casing, form intercommunication's first receiving area and second receiving area, install fixed base in second receiving area, form fixed thread on the inner wall of fixed base, stator, be located in first receiving area, rotor, be located in second receiving area, and rotor includes pivot, bearing of sleeve joint pivot and rotor disc, and pivot penetrates fixed base, and bearing is located in fixed base, and rotor disc stretches into first receiving area, and is opposite with stator, locking piece, movable sleeve joint pivot, and locking piece has locking thread, and locking thread cooperates with fixed thread, and bears against bearing, only need to rotate both ends locking piece, can push rotor axial movement, accurate control rotor disc and the clearance of stator, have reduced the requirement of part processing accuracy greatly, and can ensure that every motor of batch production reaches consistent interval standard simultaneously, improves assembly efficiency and product qualification rate.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more particularly to an axially adjustable disc stepper motor. Background Technology

[0002] In fields such as automation control, precision instruments, medical devices, and 3C electronics manufacturing, the demand for miniaturization, high precision, and high response speed of drive components is becoming increasingly stringent. Disc stepper motors, with their structural characteristics of small axial dimensions, high power density, and excellent torque-to-inertia ratio, have become one of the core drive components to meet these requirements.

[0003] Chinese patent CN101986534B discloses a disc-type stepper motor. This motor includes a disc-shaped motor housing formed by a front and rear cover fastened together. A motor shaft passes through the motor housing, and a multi-pole magnetized annular disk is fixed on the motor shaft within the motor housing. Windings are fixed inside the motor housing next to the annular disk. Iron cores are fixed on both sides of the annular disk. The entire annular disk is a single-piece structure, which effectively improves the rotor's excitation performance and simplifies the overall structure. However, due to the narrow internal space of the disc-type stepper motor, the distance between the rotor's annular disk and the stator cannot be precisely guaranteed during mass assembly. This easily leads to the annular disk not being in the optimal position, affecting the motor's working efficiency.

[0004] Therefore, it is necessary to develop an axially adjustable disc stepper motor to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a highly convenient and efficient axially adjustable disc stepper motor.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an axially adjustable disc stepper motor, comprising: The motor housing forms a first receiving area and a second receiving area that are interconnected. A fixing seat is installed in the second receiving area, and a fixing thread is formed on the inner wall of the fixing seat. The stator is located within the first containment area; The rotor is located in the second receiving area. The rotor includes a rotating shaft, a bearing sleeved on the rotating shaft, and a rotor disk. The rotating shaft passes through the fixed base, the bearing is located in the fixed base, and the rotor disk extends into the first receiving area and is opposite to the stator. A locking element is movably sleeved onto the rotating shaft. The locking element has a locking thread that engages with the fixing thread to abut against the bearing.

[0007] Furthermore, the fixing base is provided in pairs, and the pair of fixing bases are respectively installed at both ends of the second receiving area.

[0008] Furthermore, each of the fixed seats is equipped with a locking member, which is respectively sleeved on both ends of the rotating shaft and abuts against the bearing sleeved on the rotating shaft.

[0009] Furthermore, an annular spacer is provided between the first receiving area and the second receiving area. The annular spacers are a pair and are spaced apart to form a gap connecting the first receiving area and the second receiving area. The rotor disk extends into the first receiving area through the gap.

[0010] Furthermore, the stator includes a stator body, a plurality of stator teeth radially arranged within the stator body, and a coil surrounding the stator teeth. The stator body has through holes penetrating its upper and lower surfaces, and a bearing seat is installed in the through holes. The rotating shaft passes through the bearing seat.

[0011] Furthermore, the number of stators is a pair, and the pair of stators are symmetrically distributed at both ends of the first receiving area, and the two end faces of the rotor disk are respectively arranged opposite to the stator teeth of the pair of stators.

[0012] Furthermore, the fixing base includes a base body and a retaining ring surrounding the outer periphery of the base body. The base body has fixing holes extending through both ends. The fixing thread is formed on the inner wall of the fixing hole near the outer end. The outer diameter of the retaining ring abuts against and is fixedly connected to the inner wall of the motor housing.

[0013] Furthermore, the locking member has a clearance hole extending through both ends of its surface. The inner diameter of the clearance hole is larger than the outer diameter of the rotating shaft. The locking thread is formed on the outer circumferential surface of the locking member, and the inner end face of the locking member tightly abuts against the outer ring end face of the bearing.

[0014] Furthermore, the thickness of the rotor disk is smaller than the spacing between the pair of stators.

[0015] Furthermore, mounting holes are formed through both ends of the second receiving area of ​​the motor housing, the body of the fixing seat is interference-fitted with the mounting holes, and the inner end of the body of the fixing seat is adjacent to the annular spacer.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is an axially adjustable disc stepper motor. The fixed base is screwed to the locking part, so that the locking part pushes the rotor to move axially. The rotor position can be flexibly adjusted after assembly. Simply rotate the locking parts at both ends to push the bearing, shaft and rotor disc to move axially. The gap between the rotor disc and the stator can be precisely controlled, which greatly reduces the requirements for the machining accuracy of the parts. At the same time, it ensures that each motor produced in batches can meet the same spacing standard, improving assembly efficiency and product qualification rate. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of an axially adjustable disc stepper motor according to the present invention. Figure 2 for Figure 1 A cross-sectional view of an axially adjustable disc stepper motor is shown. Figure 3 for Figure 1 A schematic diagram of a partial structure of an axially adjustable disc stepper motor is shown. Figure 4 for Figure 1 The diagram shows another partial structure of the axially adjustable disc stepper motor.

[0019] In the diagram: 1. Motor housing; 2. Stator; 3. Rotor; 11. Housing body; 12. Mounting base; 13. First receiving area; 14. Second receiving area; 15. Mounting hole; 16. Annular spacer; 17. Gap; 121. Seat body; 122. Snap ring; 123. Mounting hole; 124. Mounting thread; 21. Stator body; 22. Stator teeth; 23. Coil; 211. Through hole; 24. Shaft seat; 31. Shaft; 32. Bearing; 33. Rotor disc; 4. Locking element; 41. Clearing hole; 42. Locking thread. Detailed Implementation

[0020] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, provides a detailed explanation of the specific implementation, structure, features, and effects of the disc stepper motor proposed according to this utility model. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0022] The following description, in conjunction with the accompanying drawings, details a specific solution for a disc-type stepper motor provided by this utility model.

[0023] Please refer to Figures 1 to 4 The present invention is an axially adjustable disc stepper motor, which includes a motor housing 1, a stator 2 and a rotor 3 disposed inside the motor housing 1.

[0024] Please refer to Figures 1 to 2 The motor housing 1 includes a housing body 11 and a mounting base 12 fixedly connected to the housing body 11. The housing body 11 is integrally injection molded or assembled by snap-fit. In this embodiment, the housing body 11 forms a first receiving area 13 for accommodating the stator 2 and a second receiving area 14 for accommodating the rotor 3. The first receiving area 13 and the second receiving area 14 are arranged perpendicularly to each other and are connected, and the mounting base 12 is installed in the second receiving area 14. Specifically, the first receiving area 13 surrounds the second receiving area 14, and the second receiving area 14 penetrates the outer surfaces of both ends of the housing body 11 to form mounting holes 15. There is a pair of mounting bases 12, which are fixedly installed in the mounting holes 15 respectively.

[0025] Preferably, an annular spacer 16 is provided between the first receiving area 13 and the second receiving area 14. The annular spacer 16 has a pair, one end of which is fixedly connected to the inner wall of the housing body 11, and the other end extends relative to each other to separate the first receiving area 13 and the second receiving area 14. Furthermore, the pair of annular spacers 16 directly maintain a distance to form a gap 17, through which the first receiving area 13 and the second receiving area 14 are connected.

[0026] Please refer to Figure 2The two mounting bases 12 have identical structures and are respectively installed at both ends of the second receiving area 14. Each mounting base 12 includes a base body 121, a retaining ring 122 formed around the base body 121, and a mounting hole 123 penetrating the base body 121. The base body 121 is disposed along the second receiving area 14, with its end adjacent to the gap 17. The inner diameter of the retaining ring 122 is fixedly connected to the base body 121, and its outer diameter is fixedly abutted against and fixedly connected to the housing body 11. The mounting hole 123 penetrates both end faces of the base body 121, and a fixing thread 124 is formed on its inner wall near the outer end.

[0027] Please refer to Figures 1 to 3 The stator 2 includes a stator body 21, a plurality of stator teeth 22 installed in the stator body 21, and coils 23 surrounding the stator teeth 22. The stator body 21 has through holes 211 penetrating its upper and lower surfaces, and a bearing seat 24 is installed in the through hole 211, through which the rotor 2 passes.

[0028] Several stator teeth 21 are arranged radially, with their inner end faces closely attached to the outer diameter surface of the bearing seat 24. This ensures that the stator teeth 21 are distributed in a circumferential direction according to design requirements, while also guaranteeing the distribution accuracy of the stator teeth 21 in the radial direction. The coil 24 is placed on the inner teeth of the stator teeth 21.

[0029] Preferably, there is a pair of stators 2, each located at one end of the first receiving area 13, and the pair of stators 2 are spaced apart.

[0030] Please refer to Figure 2 and Figure 4 The rotor 3 includes a shaft 31, a pair of bearings 32 sleeved on the shaft 31, and a rotor disk 33. The shaft 31 passes through the through hole 211 and the pair of bearings 32. The pair of bearings 32 are located in the second receiving area 14 and are respectively connected to the fixing holes 123 opened in the fixing seat 12, that is, the outer diameter surface of the bearing 32 is in contact with the inner wall of the fixing hole 123.

[0031] The rotor disk 33 is fixedly connected to the rotating shaft 31 and moves synchronously. Its outer diameter passes through a pair of fixed seats 12 and extends into the second receiving area 14. The two sides of the rotor disk 33 are respectively opposite to the stator 2.

[0032] Please refer to Figure 2 Both ends of the rotating shaft 31 are fitted with locking parts 4. The locking parts 4 have clearance holes 41 that penetrate through the surfaces of both ends. The clearance holes 41 are used for the rotating shaft 31 to pass through. The outer diameter surface of the locking parts 4 forms a locking thread 42. The locking thread 42 can cooperate with the fixing thread 124 to screw the locking parts 4 and the fixing seat 12 together.

[0033] Specifically, the inner ends of a pair of locking members 4 abut against the bearing 32.

[0034] When using the axially adjustable disc stepper motor of this utility model, the external control system (such as PLC or microcontroller) outputs a preset pulse electrical signal to the stator coil 23, triggering the coil to be energized and generate a magnetic field. The control circuit inputs a current (such as positive DC current) of a specific frequency and direction to the stator coil 23 according to the target rotation parameters (speed, angle). The current flows along the coil winding. When the current passes through the coil 23, the stator teeth 22 are magnetized, forming a magnetic field with alternating polarities distributed along the circumference of the stator. Since the stators are set in pairs, the magnetic fields of the two stators will form a closed magnetic circuit in the second receiving area 14, covering the space where the rotor disc 33 is located. The stator magnetic field and the rotor disc 33 generate an electromagnetic attraction / repulsion force, driving the rotor 3 to rotate around the central axis of the rotating shaft 31.

[0035] When it is necessary to adjust the distance between the rotor disk 33 and the stator 2, one of the locking parts 4 rotates clockwise through the locking thread 42 and the fixing thread 124, and moves along the shaft 31. The locking part 4 moves axially outward. The other locking part 4 rotates counterclockwise through the locking thread 42 and the fixing thread 124, and moves along the shaft 31. The locking part 4 moves axially inward, pushing the bearing 32, its shaft 31, and the rotor disk 33 to move axially, changing the distance between the rotor disk 33 and the stator 2. After reaching the position, the locking part 4 that moved axially outward moves radially inward again, abutting against the bearing 32 and fixing the position of the rotor 3.

[0036] This utility model is an axially adjustable disc stepper motor. The fixed base is screwed to the locking component, which pushes the rotor to move axially. The rotor position can be flexibly adjusted after assembly. Simply rotate the locking components at both ends to push the bearing, shaft and rotor disc to move axially. The gap between the rotor disc and the stator can be precisely controlled, which greatly reduces the requirements for the machining accuracy of the parts. At the same time, it ensures that each motor produced in batches can meet the same spacing standard, thereby improving assembly efficiency and product qualification rate.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An axially adjustable disc stepper motor, characterized in that, include: The motor housing (1) forms a first receiving area (13) and a second receiving area (14) that are interconnected. A fixing seat (12) is installed in the second receiving area (14), and a fixing thread (124) is formed on the inner wall of the fixing seat (12). The stator (2) is located within the first containment area (13); The rotor (3) is located in the second receiving area (14). The rotor (3) includes a shaft (31), a bearing (32) sleeved on the shaft (31), and a rotor disk (33). The shaft (31) passes through the fixed seat (12). The bearing (32) is located in the fixed seat (12). The rotor disk (33) extends into the first receiving area (13) and is opposite to the stator (2). The locking member (4) is movably sleeved on the rotating shaft (31). The locking member (4) has a locking thread (42), which engages with the fixing thread (124) to abut against the bearing (32).

2. The axially adjustable disc stepper motor according to claim 1, characterized in that, The fixing base (12) is provided in pairs, and the pair of fixing bases (12) are respectively installed at both ends in the second receiving area (14).

3. The axially adjustable disc stepper motor according to claim 2, characterized in that, The locking element (4) is installed in each of the fixed seats (12). The locking element (4) is respectively sleeved on both ends of the rotating shaft (31) and abuts against the bearing (32) sleeved on the rotating shaft (31).

4. The axially adjustable disc stepper motor according to claim 1, characterized in that, An annular spacer (16) is provided between the first receiving area (13) and the second receiving area (14). The annular spacers (16) are a pair and are arranged at intervals to form a gap (17) connecting the first receiving area (13) and the second receiving area (14). The rotor disk (33) extends into the first receiving area (13) through the gap (17).

5. The axially adjustable disc stepper motor according to claim 1, characterized in that, The stator (2) includes a stator body (21), a plurality of stator teeth (22) arranged radially within the stator body (21), and a coil (23) surrounding the stator teeth (22). The stator body (21) has a through hole (211) penetrating its upper and lower surfaces. A bearing seat (24) is installed in the through hole (211), and the rotating shaft (31) passes through the bearing seat (24).

6. The axially adjustable disc stepper motor according to claim 5, characterized in that, The number of stators (2) is a pair, which are symmetrically distributed at both ends of the first receiving area (13), and the two end faces of the rotor disk (33) are respectively arranged opposite to the stator teeth (22) of the pair of stators (2).

7. The axially adjustable disc stepper motor according to claim 1, characterized in that, The fixing seat (12) includes a seat body (121) and a retaining ring (122) surrounding the outer periphery of the seat body (121). The seat body (121) has a fixing hole (123) passing through both ends therethrough. The fixing thread (124) is formed on the inner wall of the fixing hole (123) near the outer end. The outer diameter of the retaining ring (122) abuts against and is fixedly connected to the inner wall of the motor housing (1).

8. The axially adjustable disc stepper motor according to claim 1, characterized in that, The locking member (4) has a clearance hole (41) that penetrates both ends of its surface. The inner diameter of the clearance hole (41) is larger than the outer diameter of the rotating shaft (31). The locking thread (42) is formed on the outer peripheral surface of the locking member (4), and the inner end face of the locking member (4) is in close contact with the outer ring end face of the bearing (32).

9. The axially adjustable disc stepper motor according to claim 6, characterized in that, The thickness of the rotor disk (33) is smaller than the spacing between the pair of stators (2).

10. The axially adjustable disc stepper motor according to claim 4, characterized in that, Mounting holes (15) are formed through both ends of the second receiving area (14) of the motor housing (1). The seat body (121) of the fixing seat (12) is interference-fitted with the mounting hole (15), and the inner end of the seat body (121) is adjacent to the annular spacer (16).

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