CN216929747U

CN216929747U - Brushless motor and treadmill

Info

Publication number: CN216929747U
Application number: CN202220542158.1U
Authority: CN
Inventors: 黄康军; 黄解云
Original assignee: Zhongshan Rotontek Machinery Co ltd
Current assignee: Zhongshan Rotontek Machinery Co ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-07-08
Anticipated expiration: 2032-03-11

Abstract

The utility model is suitable for the technical field of power tools, and provides a brushless motor and a treadmill, wherein the brushless motor comprises: a first end cap; an inductive encoder fixedly mounted on said first end cap; the stator assembly is fixedly assembled with the first end cover and is internally provided with an accommodating through hole; the rotor assembly is embedded in the accommodating through hole and performs rotary motion in the accommodating through hole; and the induction sheet is fixedly assembled with one end of the rotor assembly, which is close to the inductive encoder, so as to send the rotation position information of the rotor assembly to the inductive encoder. The motor speed can be controlled through the matching of the inductive encoder and the induction sheet, the control precision is high, and the low-speed moment is large, so that the treadmill cannot be jammed when running at a low speed, massive crowds can be met, and perfect motion experience is brought to users.

Description

Brushless motor and treadmill

Technical Field

The utility model belongs to the technical field of power tools, and particularly relates to a brushless motor and a treadmill.

Background

At present, the low voltage direct current motor is adopted mostly to traditional treadmill, and this kind of motor is used and need not the carbon brush to commutate, and the live time need be changed about 500 hours, and the cost is higher, is unfavorable for the use.

Therefore, in order to meet the requirements of the running machine, the brushless direct current motor can be applied, the existing brushless direct current motor adopts the Hall element to realize reversing identification, but the output torque is small at low speed, the control precision is not high, and the requirements of large and heavy people cannot be met when the brushless direct current motor runs at low speed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a brushless motor and a treadmill, and aims to solve the problems that an existing brushless direct current motor is small in output torque at low speed and low in control precision.

The present invention is achieved as such, a brushless motor comprising:

a first end cap;

an inductive encoder fixedly mounted on said first end cap;

the stator assembly is fixedly assembled with the first end cover and is internally provided with an accommodating through hole;

the rotor assembly is embedded in the accommodating through hole and performs rotary motion in the accommodating through hole;

and the induction sheet is fixedly assembled with one end of the rotor assembly close to the inductive encoder so as to send the rotation position information of the rotor assembly to the inductive encoder.

In one embodiment, the rotor assembly includes:

the motor shaft is fixedly assembled with the induction sheet;

the rotor cores are arranged in a staggered mode and are sequentially sleeved on the motor shaft; and

and the bearing is fixedly assembled with the motor shaft.

In one embodiment, the stator assembly includes:

the stator cores are mutually spliced to form a stator core with the accommodating through hole inside, and one side, close to the accommodating through hole, of each stator core is provided with a mounting groove; and

and the stator winding is embedded in the mounting groove to generate a rotating magnetic field for driving the rotor assembly to rotate in the accommodating through hole.

In one embodiment, the brushless motor includes:

the second end cover is fixedly assembled with one end, far away from the first end cover, of the stator assembly;

and the first end cover and the second end cover are respectively provided with an installation through hole communicated with the accommodating through hole.

In one embodiment, the brushless motor includes:

and the transmission component is fixedly assembled with the motor shaft and comprises a flywheel and a belt pulley.

In one embodiment, the transmission assembly is provided with a heat dissipation fan, and the heat dissipation fan, the flywheel and the belt pulley are integrally formed.

In one embodiment, the number of the rotor cores is 4, and the rotor cores are arranged in a manner of being staggered by 3 degrees in pairs.

In one embodiment, the number of the stator cores is 12, and the stator cores are spliced and fixed with each other to form a circumferential structure.

In one embodiment, the distance between the inductive encoder and the sensing plate is 2 mm.

In one embodiment, a treadmill is provided that includes a brushless motor as described above.

In an embodiment of the present invention, there is provided a brushless motor and a treadmill, the brushless motor including: a first end cap; an inductive encoder fixedly mounted on said first end cap; the stator assembly is fixedly assembled with the first end cover and is internally provided with an accommodating through hole; the rotor assembly is embedded in the accommodating through hole and performs rotary motion in the accommodating through hole; and the induction sheet is fixedly assembled with one end of the rotor assembly, which is close to the inductive encoder, so as to send the rotation position information of the rotor assembly to the inductive encoder. The motor speed can be controlled through the matching of the inductive encoder and the induction sheet, the control precision is high, and the low-speed moment is large, so that the treadmill cannot be jammed when running at a low speed, massive crowds can be met, and perfect motion experience is brought to users.

Drawings

Fig. 1 is an exploded view of a brushless motor according to an embodiment of the present invention;

FIG. 2 is an exploded view of a rotor assembly provided by the present invention

FIG. 3 is a schematic structural diagram of a rotor assembly provided in accordance with an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a stator assembly provided by an embodiment of the present invention;

wherein, 1, a first end cover; 2. an inductive encoder; 3. a stator assembly; 4. a rotor assembly; 5. an induction sheet; 6. a second end cap; 7. a wire pressing cover; 8. a motor mounting seat; 9. a transmission assembly; 10. a cover plate; 31. an accommodating through-hole; 32. a stator core; 33. a stator winding; 41. a motor shaft; 42. a rotor core; 43. and (5) a bearing.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit the utility model.

In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In an embodiment of the present invention, there is provided a brushless motor and a treadmill, the brushless motor including: a first end cap 1; an inductive encoder 2 fixedly mounted on the first end cap 1; the stator assembly 3 is fixedly assembled with the first end cover 1 and is internally provided with a containing through hole 31; a rotor assembly 4 embedded in the receiving through hole 31 and performing a rotational motion in the receiving through hole 31; and the sensing piece 5 is fixedly assembled at one end of the rotor assembly 4 close to the inductive encoder 2 so as to send the rotation position information of the rotor assembly 4 to the inductive encoder 3. The motor speed can be controlled through the matching of the inductive encoder and the induction sheet, the control precision is high, and the low-speed moment is large, so that the treadmill cannot be jammed when running at a low speed, massive crowds can be met, and perfect motion experience is brought to users.

The inductive encoder 2 may be an inductive encoder outputting sine and cosine.

The inductive encoder 2 can be arranged on an inductive encoder control board, a plurality of fixing screw hole sites are arranged on the control board, and the inductive encoder control board and the first end cover 1 can be fixedly assembled together through screws through the screw hole sites.

Wherein, the number of the fixing screw hole positions can be 3.

In one embodiment of the present invention, the distance between the inductive encoder 2 and the sensing piece 5 can be controlled to be 2mm by fixing the control board of the inductive encoder on the first end cap 1 and fixing the sensing piece on the motor shaft. The induction distance between the encoder and the induction sheet can be effectively controlled, and the speed controllability of the motor is improved.

The first end cover 1 may be a rear cover of the motor.

In an embodiment of the present invention, the rotor assembly 4 includes: a motor shaft 41 fixedly assembled with the sensing piece 5; a plurality of rotor cores 42 which are arranged in a staggered manner and are sequentially sleeved on the motor shaft 41; and a bearing 43 fixedly fitted with the motor shaft 41.

Wherein, be provided with the magnet steel on this rotor core 42's the lateral wall, can produce the interact through this magnet steel with the rotating magnetic field that the stator produced to promote rotor subassembly 4 to rotate, realize brushless motor's operation.

In an embodiment of the present invention, the number of the rotor cores 42 may include 4, and the two rotor cores are arranged in a staggered manner by 3 degrees and are sequentially sleeved on the motor shaft 41. The four-section design is formed, the mutual difference value between every two sections is set to be 3 degrees, the noise of the motor can be reduced, the low-speed running stability of the motor is improved, and the low-speed performance controllability is good.

In an embodiment of the present invention, the number of the bearings 43 may include two, and the two bearings are respectively sleeved on the motor shaft 41 at two ends of the rotor core.

In an embodiment of the present invention, the stator assembly 3 includes: a plurality of stator cores 32 are spliced with each other to form a stator core 32 with the accommodating through hole 31 inside, and a mounting groove (not shown in the figure) is arranged on one side of each stator core 32 close to the accommodating through hole 31; and a stator winding 33 embedded in the mounting groove to generate a rotating magnetic field for driving the rotor assembly 4 to rotate in the receiving through-hole 31.

In an embodiment of the present invention, the stator core 32 may include 12 stator cores, and the stator cores are fixed to each other end to form a circumferential structure. This circumference structure's center is provided with this and holds through-hole 31, and this stator winding 33 can inlay and locate in this mounting groove, when the circular telegram, forms rotating magnetic field in this holds through-hole, and this rotor subassembly 4 inlays and locates in this holds through-hole, produces the interact power between magnet steel that sets up on the rotor core 42 and this rotating magnetic field, and then promotes rotor subassembly 4 and rotates, realizes brushless motor's operation.

The stator core 32 may be an independent component, and each stator core 32 may be connected by a snap fit, a welding, or the like. The splicing design is adopted, so that the material utilization rate can be effectively improved, and the winding efficiency can be effectively improved.

In an embodiment of the present invention, the brushless motor includes: a second end cover 6 fixedly assembled with one end of the stator assembly 3 far away from the first end cover 1; the first end cap 6 and the second end cap 1 are both provided with mounting through holes (not shown in the figure) communicated with the accommodating through holes 31. So that the motor shaft 41 can be inserted into the receiving through-hole 31.

Wherein the second end cap 6 may be a front cover of the motor.

In an embodiment of the present invention, a motor housing (not shown) is fixedly assembled on the outer side of the stator assembly 3, and the first end cover 1 and the second end cover 6 can be fixedly assembled with the motor housing by locking screws (not shown).

The motor shell can be formed by hot extrusion molding materials, so that the heat dissipation of the motor can be improved, and the material utilization rate can be improved.

Wherein, the hot extrusion molding material can be 6061 aluminum alloy.

In an embodiment of the utility model, a wire cover 7 is provided on the outer side wall of the stator assembly 3.

In an embodiment of the present invention, the brushless motor further includes a motor mounting base 8, and the motor mounting base 8 can be fixedly assembled with the body through a locking screw (not shown) to support the motor.

In an embodiment of the present invention, the first end cap 1 and the second end cap 6 can be die-cast by using ADC12, so that the molding precision is high and the machining allowance is small.

Wherein, this ADC12 is die-casting aluminum alloy material.

In an embodiment of the present invention, the brushless motor includes: and the transmission assembly 9 is fixedly assembled with the motor shaft 41, and the transmission assembly 9 comprises a flywheel and a belt pulley. The power is transmitted through the belt pulley, and the running stability is kept through the flywheel.

Wherein, a heat dissipation fan (not shown in the figure) is arranged on the transmission component 9, and the heat dissipation fan, the flywheel and the belt pulley can be integrated into an integral structure. Through setting up this radiator fan, can improve the radiating effect of motor.

In an embodiment of the present invention, the brushless motor further includes a cover plate 10, the cover plate 10 is fixedly assembled with the first end cap 1, and an inductive encoder control board is fixed between the cover plate 10 and the first end cap 1.

In an embodiment of the present invention, there is also provided a treadmill including the above brushless motor. By adopting the sine and cosine output inductive encoder, the speed of the brushless motor can be controlled, the control precision is high, the low-speed moment is large, and the index requirement of the electric running machine can be completely met.

The utility model has the following effects:

1. the motor speed can be controlled through the matching of the inductive encoder and the induction sheet, the control precision is high, and the low-speed moment is large, so that the treadmill cannot be jammed when running at a low speed, massive crowds can be met, and perfect motion experience is brought to users.

2. Through adopting the wrong utmost point of four-section formula to handle with rotor core, promptly, come two liang of crisscross 3 degrees settings each other, the motor noise can be reduced, promotes motor low-speed operation stationarity.

3. The stator core is arranged in a splicing mode, so that the material utilization rate can be effectively improved, and the winding efficiency can be improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A brushless motor, comprising:

a first end cap (1);

an inductive encoder (2) fixedly mounted on the first end cap (1);

the stator assembly (3) is fixedly assembled with the first end cover (1) and is internally provided with a containing through hole (31);

a rotor assembly embedded in the accommodating through hole (31) and performing rotary motion in the accommodating through hole (31);

and the induction sheet (5) is fixedly assembled with one end, close to the inductive encoder (2), of the rotor assembly (4) so as to send the rotation position information of the rotor assembly (4) to the inductive encoder (2).

2. The brushless electric machine according to claim 1, wherein the rotor assembly (4) comprises:

a motor shaft (41) fixedly assembled with the induction sheet (5);

a plurality of rotor cores (42) which are arranged in a staggered mode and are sequentially sleeved on the motor shaft (41); and

and a bearing (43) fixedly assembled with the motor shaft (41).

3. The brushless electric machine according to claim 1, characterized in that the stator assembly (3) comprises:

the stator cores (32) are mutually spliced to form the stator core (32) with the accommodating through hole (31) inside, and one side, close to the accommodating through hole (31), of each stator core (32) is provided with a mounting groove; and

a stator winding (33) embedded on the mounting groove to generate a rotating magnetic field for driving the rotor assembly (4) to rotate in the accommodating through hole (31).

4. The brushless electric machine of claim 1, comprising:

the second end cover (6) is fixedly assembled with one end, far away from the first end cover (1), of the stator assembly (3);

and the first end cover (1) and the second end cover (6) are respectively provided with an installation through hole communicated with the accommodating through hole (31).

5. The brushless electric machine of claim 2, comprising:

and the transmission assembly (9) is fixedly assembled with the motor shaft (41), and the transmission assembly (9) comprises a flywheel and a belt pulley.

6. The brushless electric machine according to claim 5, characterized in that the transmission assembly (9) is provided with a heat dissipating fan, which is of an integral structure with the flywheel and the pulley.

7. The brushless electric machine according to claim 2, wherein the rotor core (42) comprises 4 and is arranged to be staggered by 3 ° with respect to each other two by two.

8. A brushless electric machine according to claim 3, wherein the stator core (32) comprises 12 pieces and is fixed to each other in a spliced manner to form a circumferential structure.

9. A brushless electric machine according to claim 1, characterized in that the distance between the inductive encoder (2) and the sensor plate (5) is 2 mm.

10. A treadmill, characterized in that it comprises a brushless motor according to any of claims 1-9.