CN217445127U - Virtual position-free holder motor - Google Patents

Abstract

The utility model belongs to the technical field of brushless motors, in particular to a virtual position-free holder motor, which comprises a front end cover provided with a central hole, a casing, a rotating shaft positioned in the casing, a bearing sleeved on the rotating shaft and positioned in the casing, a stator seat sleeved on the bearing, a stator arranged on the stator seat, a PCB board, and a magnetic ring which is arranged on the inner wall of the casing and is coaxial with the stator seat; one end of the rotating shaft is connected with the front end cover and the rotating shaft is arranged along the axial direction of the front end cover; the front end cover and the shell are integrally formed and coaxial. The utility model discloses has following effect: 1. the concentricity error of the front end cover and the shell is avoided, and the vibration and the noise of the motor are reduced or eliminated; 2. the motor is ensured to rotate smoothly, and the motor has the effects of simple structure, easy operability and stable virtual position removal; 3. the purposes of reducing vibration and noise are achieved; 4. the gasket and clamp spring structure adopted by the existing motor is not needed, the cost is low, and the assembly is simple; 5. the PCB board is internally provided with a threading hole, so that the tail part of the lead is prevented from being broken.

Description

Virtual position-free holder motor

Technical Field

The utility model relates to a brushless motor technical field specifically indicates a well low-speed, big moment of torsion, low loss, low tooth's socket, little volume and well high accuracy control's motor that is used for products such as unmanned aerial vehicle, robot, handheld cloud platform, security protection photography, laser radar.

Background

At present, the brushless motor trade develops faster and faster, also more and more maturely, and more brushless motor is applied to some special trades through certain change, like fields such as emerging unmanned aerial vehicle, robot, handheld cloud platform, security protection photography, laser radar to replace traditional direct current step-by-step or servo motor. It is desirable that such brushless motors have characteristics of medium and low speed, large torque, low loss, low cogging, small size, and can be driven with a drive to achieve medium and high precision control, and further that such motors operate smoothly, with smooth, low play, low vibration, and low noise. The existing brushless motor mostly adopts an outer rotor brushless structure, the self-generated structure limits that double ball bearings are generally adopted, a rotor assembly and a stator assembly are matched with a virtual position (namely, the motor generates axial displacement of a certain distance) by adding a gasket, and the motor is assembled by using a clamp spring. The rotor component is a front end cover, a machine shell, the rotor component and the machine shell are assembled in a press-fitting mode, the concentricity is poor, and a clamping spring is clamped after the gasket is matched with the stator component, the characteristic that the inner and outer rings jump is existed in the ball bearing, the whole virtual position of the motor is easy to remove incompletely or a larger virtual position phenomenon is existed, the structure is unstable when the motor is powered on and operated, the motor jumps up and down, vibration and larger noise are generated, or the matched gaskets are too much, the extruding motor is excessive, the motor is not smoothly operated, the clamping or the current loss is too high, and the motor needs a plurality of turns due to medium and low speed, the winding wire diameter is small, the direct wire outlet or the welding wire is easy to break to cause the phase loss or the non-rotation of the motor when the motor is used. Therefore, the prior art has the following defects:

1. the front end cover and the shell are designed in a split mode, concentricity difference is generated during press mounting, the whole machine is not concentric, and vibration and noise are generated during power-on operation of a motor;

2. when the whole machine is assembled, the matched dummy position of the added gasket is fixed through the clamp spring, so that the matched gasket is easy to be too few, the motor has the dummy position, the structure is unstable and moves up and down to generate vibration and loud noise when the motor is electrified and operated, or the matched gasket is too much, the extruded motor is excessive, the motor is not smoothly operated, and the jam or the current loss is too high;

3. the double ball bearings have the characteristic of inner and outer ring displacement, and the clamp spring and the gasket cannot apply pre-pressure to extrude the inner and outer rings of the ball bearings to remove the virtual position, so that vibration and noise are generated when the motor operates;

4. the fitting gasket and the clamp spring are fixed, manual repeated operation is needed, the process is complicated, the quantity of the gasket is difficult to control, and the effect of removing the dummy bits is unstable;

5. the adoption of direct lead or bonding wire is easy to cause fracture and the motor is out of phase or does not rotate.

SUMMERY OF THE UTILITY MODEL

In order to overcome prior art's weak point, the utility model aims to provide a do not have virtual position cloud platform motor, it aims at solving prior art's front end housing and casing concentricity difference, causes the complete machine decentraction, produces the problem of vibrations and noise during the motor circular telegram operation.

In order to achieve the above object, the utility model adopts the following technical scheme: a tripod head motor without virtual positions comprises a front end cover provided with a central hole, a machine shell, a rotating shaft positioned in the machine shell, a bearing sleeved on the rotating shaft and positioned in the machine shell, a stator seat sleeved on the bearing, a stator arranged on the stator seat, a PCB (printed circuit board) and a magnetic ring which is arranged on the inner wall of the machine shell and is coaxial with the inner wall of the machine shell; one end of the rotating shaft is connected with the front end cover and the rotating shaft is arranged along the axial direction of the front end cover; the front end cover and the shell are integrally formed and coaxial.

Preferably, the other end of the rotating shaft is provided with an external thread section, and the end of the rotating shaft is sleeved with a shaft sleeve positioned on the external thread section.

Preferably, the stator seat includes a cylinder body sleeved on the bearing, and the stator is sleeved on the cylinder body.

Preferably, a cylinder body which is sleeved on the rotating shaft and is integrally formed with the front end cover is arranged on the inner wall of the front end cover, an O-shaped ring which is positioned between the cylinder body and the bearing is sleeved on the rotating shaft, and two sides of the O-shaped ring are respectively clung to the end surfaces of the bearing and the cylinder body.

Preferably, the number of the bearings is two, and both the two bearings are ball bearings; the front end of the shaft sleeve is in contact with the end face of the bearing positioned on the rear side, and the O-shaped ring is positioned between the cylinder body and the rear bearing.

Preferably, a glue groove is arranged in the outer wall of one end, connected with the front end cover, of the rotating shaft, and the barrel is sleeved outside the glue groove.

Preferably, the O-ring is made of wear-resistant elastic material.

Preferably, the induction device further comprises an induction ring sleeved on the rotating shaft, and the induction ring is embedded in the shaft sleeve.

Preferably, an axial through hole is formed in the rotating shaft; the PCB is arranged in the rear surface of the stator seat, and a threading hole is formed in the PCB.

Preferably, an axial through hole is formed in the rotating shaft; the front end cover is disc-shaped, the shell is cylindrical, the diameter of the front end cover is smaller than that of the shell, and a step part is formed at the position where the front end cover and the shell are combined.

The beneficial technical effects are as follows: the motor of the utility model comprises a rotor assembly consisting of an integrally formed front end cover, a casing and a magnetic ring fixedly arranged on the inner wall of the casing, a stator assembly consisting of a stator seat, a stator and a bearing, wherein the front end cover is fixedly connected with a rotating shaft, and the stator seat is sleeved on the bearing; the O-shaped ring is sleeved on the rotating shaft and positioned between the bearing and the barrel, namely the wear-resistant and elastic O-shaped ring is arranged between the stator assembly and the rotor assembly; therefore, the utility model discloses has following effect: 1. the front end cover and the shell are integrally formed, so that concentricity errors caused by assembling the front end cover and the shell in other modes are avoided, and vibration and noise generated when the motor is electrified and operated are reduced or eliminated; 2. the bearing is axially extruded along the rotating shaft through the shaft sleeve arranged at the other end of the rotating shaft, so that the O-shaped ring and the bearing are extruded, the inner and outer play amount of the double bearings in the whole machine and the stator seat is removed, the virtual position is completely removed, the motor is ensured to rotate smoothly, and the motor has the effects of simple structure, easy operability and stable virtual position removal; 3. the O-shaped vibration buffering ring is made of elastic materials resistant to a grinding tool, and can play a role in buffering and adjusting the concentricity of the rotor assembly and the stator assembly when the motor runs, so that the aim of reducing vibration and noise is fulfilled; 4. the gasket and clamp spring structure adopted by the existing motor is not needed, the cost is low, and the assembly is simple; 5. the PCB board is internally provided with a threading hole, so that the tail part of the lead is prevented from being broken.

Drawings

FIG. 1 is an assembled perspective view of an embodiment of the present invention;

FIG. 2 is an exploded view of an embodiment of the present invention;

fig. 3 is a cross-sectional view of an embodiment of the present invention;

fig. 4 is a perspective view of another perspective view of the embodiment of the present invention;

fig. 5 is a rear view of an embodiment of the present invention.

Detailed Description

In order to make the technical field of the present invention better understand, the present invention is further described in detail with reference to the accompanying drawings and embodiments.

As shown in fig. 1-5, an embodiment of the present invention provides a virtual position-free pan/tilt motor, which includes a front end cover 1 having a central hole 101; the magnetic bearing comprises a machine shell 2, a rotating shaft 3 positioned in the machine shell 2, a bearing 5 sleeved on the rotating shaft 3 and positioned in the machine shell 2, a stator seat 6 sleeved on the bearing 5, and a stator 7 arranged on the stator seat 6, wherein one end of the rotating shaft 3 is connected with a front end cover 1, the rotating shaft 3 is arranged along the axial direction of the front end cover, and a magnetic ring 8 which is arranged on the inner wall of the machine shell 2 and is coaxial with the inner wall; in the embodiment, in order to improve the concentricity of the front end cover 1 and the housing 2 after assembly, the front end cover 1 and the housing 2 are integrally formed, that is, the front end cover 1 and the housing 2 are integrally formed, and the axes of the front end cover 1 and the housing 2 are on the same straight line, that is, the front end cover and the housing are coaxial.

Specifically, as shown in fig. 2, the front end cover 1 is disc-shaped, the housing 2 is cylindrical, the diameter of the front end cover 1 is smaller than that of the housing 2, and a step portion 9 is formed at a position where the front end cover 1 and the housing 2 are combined, so as to externally connect other components to improve positioning accuracy; a cylinder body 102 which is sleeved on the rotating shaft 3 and is integrally formed with the front end cover 1 is arranged on the inner wall of the front end cover 1, the cylinder body is communicated and coaxial with the central hole 101, an O-shaped ring 10 which is positioned between the cylinder body and the bearing 5 is sleeved on the rotating shaft 3, and two sides of the O-shaped ring 10 are respectively clung to the bearing 5 and the end surface of the cylinder body; here, the front end cover 1 and the casing 2 are integrally formed, and the magnetic ring 8 is fixed on the inner wall of the casing 2, and the three form a rotor assembly.

The O-shaped ring is made of wear-resistant elastic materials, has wear resistance and elasticity, can be compressed for a certain distance and rebounded after being stressed, and has certain protection and buffering functions. The magnetic ring 8 here is a multi-pole magnetic ring which is used to provide a magnetic field to the motor. The stator 7 is made of silicon steel sheets in a laminated mode.

Be equipped with glue groove 301 in the one end outer wall that is connected with front end housing 1 on pivot 3, because this end is connected with the front end housing, so can regard as the front end of pivot 3, glue groove 301 at this department is used for placing more glue to it is more stable when pivot 3 passes through glue bonding with front end housing 1, glue groove 301 at this department is the heliciform, and the shape is similar with the screw thread, and during the assembly, the outside in glue groove 301 is located to the barrel cover.

As shown in fig. 2, the present embodiment adopts a dual-bearing structure, that is, two bearings 5 are sleeved on the rotating shaft 3, and both are ball bearings; the stator seat 6 includes a cylinder 601 sleeved on the two bearings 5, and the stator 7 is sleeved on the cylinder 601. The front end cover 1 is located at the front, and correspondingly, the two bearings 5 are arranged in the front and the back.

The shaft sleeve 11 is connected with the other end of the rotating shaft 3, wherein the opposite end of the rotating shaft can also be regarded as the rear end, in order to install the shaft sleeve 11, the end of the rotating shaft 3 is provided with an external thread section 302, and the shaft sleeve 11 is sleeved on the external thread section 302, namely the shaft sleeve 11 is connected with the rotating shaft 3 through threads, so that the installation or the disassembly is convenient.

After assembly, the front end of the shaft sleeve 11 is in contact with the end face of the bearing 5 located on the rear side, and the O-ring 10 is located between the cylinder and the bearing 5 located on the rear side.

An axial through hole 303 is formed in the rotating shaft 3, that is, the rotating shaft 3 is cylindrical.

Specifically, in the present embodiment, the PCB 4 is embedded in the rear surface of the stator base 6, and the number of the threading holes 401 is not particularly limited and is determined according to the condition of the lead, so as to prevent the tail of the lead from being broken.

Still include the set and locate the inductive loop 12 on the pivot 3, inductive loop 12 inlays and locates in axle sleeve 11, and it adopts neodymium iron boron material sintering to make and two poles magnetize.

During assembly, anaerobic glue is applied to the position of the rotating shaft 3 where the glue groove 301 is arranged, and then the anaerobic glue is pressed into the cylinder body of the front end cover and the central hole 101; the magnetic ring 8 is filled on the inner wall of the shell after being beaten with anaerobic glue; after two bearings 5 are filled with anaerobic glue, the mixture is filled into a cylinder 601 of a stator seat 6, wherein the cylinder can be regarded as a bearing chamber; sleeving the O-shaped ring 10 on the rotating shaft 3, and then penetrating the other end of the rotating shaft 3 through the two bearing inner holes; the other end of the rotating shaft 3 extends out of the two bearings 5, and then the shaft sleeve 11 is arranged on the external thread section 302 of the rotating shaft 3 and screwed tightly, so that the dummy bit is completely removed; the induction ring 12 is filled in the rear end of the shaft sleeve 11 after being beaten with anaerobic glue; epoxy resin is arranged on the edge of the PCB 4 and is arranged on the stator seat 6, and a three-phase lead of the motor is welded on the PCB through a threading hole 401; after assembly is completed, the shaft sleeve 11 and the O-shaped ring 10 jointly extrude the rotor assembly and the stator assembly on the rotating shaft 3, so that the virtual position can be removed, and the smooth rotation of the motor can be ensured; by adopting the structure, the virtual position-free holder motor structure of the utility model has the advantages of simple assembly operation, low cost, high concentricity, smoothness, no virtual position, stable power-on operation, low vibration, low noise and no lead fracture; the motor can be used in any outer rotor brushless motor product.

In the above description, it should be noted that the terms "mounted," "connected," and the like are used in a broad sense, and for example, they may be fixedly connected, detachably connected, or integrally connected; the connection can be direct connection or indirect connection through an intermediate medium, and the connection between the two components can be realized; the term "mounted" is to be understood as "mounted on" and "disposed on" and includes fixed mounting, movable mounting and the like.

It is to be understood that the above-described embodiments are only some of the embodiments of the present invention, and not all embodiments, and that the appended drawings illustrate preferred embodiments of the present invention, but do not limit the scope of the invention. The present invention may be embodied in many different forms and, on the contrary, these embodiments are provided so that this disclosure will be thorough and complete. All utilize the equivalent structure that the content of the utility model discloses a specification and attached drawing was done, direct or indirect application is in other relevant technical field, all is in the same way the utility model discloses within the patent protection scope.

Claims (10)

1. A tripod head motor without virtual positions comprises a front end cover provided with a central hole, a machine shell, a rotating shaft positioned in the machine shell, a bearing sleeved on the rotating shaft and positioned in the machine shell, a stator seat sleeved on the bearing, a stator arranged on the stator seat, a PCB (printed circuit board) and a magnetic ring which is arranged on the inner wall of the machine shell and is coaxial with the inner wall of the machine shell; one end of the rotating shaft is connected with the front end cover and the rotating shaft is arranged along the axial direction of the front end cover; the front end cover and the shell are integrally formed and coaxial.

2. The gimbal motor as claimed in claim 1, wherein the shaft has an external thread section at the other end thereof, and a sleeve is disposed on the external thread section at the other end of the shaft.

3. The tripod head motor of claim 2, wherein the stator holder comprises a cylinder body sleeved on the bearing, and the stator is sleeved on the cylinder body.

4. A tripod head motor without a virtual position as claimed in claim 2, wherein the inner wall of the front end cover is provided with a cylinder body sleeved on the rotating shaft and integrally formed with the front end cover, the rotating shaft is sleeved with an O-ring positioned between the cylinder body and the bearing, and two sides of the O-ring are respectively tightly attached to the bearing and the end surface of the cylinder body.

5. The virtual-position-free pan-tilt motor according to claim 4, wherein the number of the bearings is two, and both are ball bearings; the front end of the shaft sleeve is in contact with the end face of the bearing positioned on the rear side, and the O-shaped ring is positioned between the cylinder body and the rear bearing.

6. The tripod head motor of claim 5, wherein a glue tank is disposed in an outer wall of an end of the rotating shaft connected to the front end cover, and the cylinder is sleeved outside the glue tank.

7. A tripod head motor without a virtual position as claimed in claim 4, wherein said O-ring is made of wear-resistant elastic material.

8. The virtual position-free pan/tilt head motor according to claim 2, further comprising a set of induction rings disposed on the rotating shaft, wherein the induction rings are embedded in the shaft sleeve.

9. The virtual-position-free pan/tilt motor according to claim 2, wherein the rotating shaft is provided with an axial through hole; the PCB is arranged in the rear surface of the stator seat, and a threading hole is formed in the PCB.

10. The virtual-position-free pan/tilt motor according to claim 2, wherein the rotating shaft is provided with an axial through hole; the front end cover is disc-shaped, the shell is cylindrical, the diameter of the front end cover is smaller than that of the shell, and a step part is formed at the position where the front end cover and the shell are combined.

Images