CN114726159A - Transmission mechanism and motor stator - Google Patents

Abstract

The invention discloses a transmission mechanism and a motor stator, wherein the motor stator comprises a shell and a stator coil arranged in the shell; the shell comprises a shell body and a cover plate, wherein the cover plate is fixedly connected with the open end of the shell body so as to enclose a space for accommodating the stator coil; the open end has apron installation face and convex part, the apron has the installation department that forms from the radial outside extension of plate body, the plate body periphery of apron along with the inner wall of casing is radial to be laminated, the installation department with apron installation face axial is taken up to, and by for the body of casing is bent the convex part pressfitting is fixed the plate body of apron. By applying the scheme, the cover plate can be quickly assembled and fixed with the shell, the production efficiency can be effectively improved, and energy is saved.

Description

Transmission mechanism and motor stator

Technical Field

The invention relates to the technical field of refrigeration, in particular to a transmission mechanism and a motor stator.

Background

The electric air door is used in an air duct system with refrigeration requirement equipment, such as an air-cooled refrigerator, a freezer and the like, cold air generated by rotation of the fan enters the refrigerating chamber through the air duct system, the cold air quantity is adjusted or the cold air flow is cut off through the electric air door, and excessive cold air is prevented from entering the refrigerating chamber. Referring to fig. 16, a schematic of a typical motorized damper is shown.

The motor 01 and the reduction gear group 02 of the electric air door are arranged in the gear box 03, the door panel is connected with the output gear through the rotating shaft, and the motor outputs torque through the reduction gear and transmits the torque to the rotating shaft to drive the door panel to open and close. The shell of the motor is a stamping part, and the upper cover plate is connected with the upper shell, and the lower cover plate is connected with the lower shell respectively and then assembled into a whole. The splicing seam between the upper motor shell and the lower motor shell of the motor adopts the welding and fixing mode of argon arc welding, laser welding and the like, and the production efficiency is lower. Further referring to fig. 17 and fig. 18, fig. 17 is a schematic view of the motor in fig. 16, and fig. 18 is a sectional view taken along a-a of fig. 17.

In addition, the motor rotor shaft 011 is in compression joint with the lower cover plate 012 of the shell, the first-stage transmission gear shaft 021 of the reduction gear set is in compression joint with the upper cover plate 013, a plurality of stamping parts are arranged in the assembly relation of the rotor shaft 011 and the first-stage transmission gear shaft 021, and due to the fact that the stamping parts are not high in size precision, accumulated tolerance of the distance between the two shafts is large, abnormal sound is easy to occur when the air door operates, and the problem that noise exceeds standard or even is directly blocked occurs.

Disclosure of Invention

In order to solve the technical problems, the invention provides a transmission mechanism and a motor stator, so that the production efficiency is effectively improved, and energy is saved.

The invention provides a motor stator, which comprises a shell and a stator coil arranged in the shell; the shell comprises a shell body and a cover plate, wherein the cover plate is fixedly connected with the open end of the shell body so as to enclose a space for accommodating the stator coil; the open end has apron installation face and convex part, the apron has the installation department that forms from the radial outside extension of plate body, the plate body periphery of apron along at least part with the inner wall of casing is radially laminated, the installation department with apron installation face axial is taken up to, and by for the body of casing is bent the convex part pressfitting is fixed the plate body of apron.

Compared with the background art, this scheme sets up apron installation face and convex part at stator housing's open end, correspondingly, when assembling, makes this convex part on the body of casing inwards bend through external force, but the fixed plate body of apron of pressfitting can accomplish fast that the apron is fixed with the equipment of casing. So set up, splice the welded fastening mode that the seam used argon arc to weld, laser welding etc. between the upper and lower motor housing that has replaced the motor, can improve production efficiency to the energy is saved. In addition, the motor assembly is more convenient, and the automation is easier to realize.

Drawings

FIG. 1 is a schematic view of an open position of the motorized damper according to an embodiment;

FIG. 2 is a schematic view of the door panel of FIG. 1 in assembled relation with an internal transmission;

FIG. 3 is a schematic view of the transmission mechanism in an embodiment;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a schematic structural view of the gearbox shown in FIG. 1;

FIG. 6 is a schematic view of the motor shown in FIG. 1;

FIG. 7 is a schematic view of the assembled relationship of the motor stator and the gear box in an embodiment;

FIG. 8 is a schematic view of the positioning post shown in FIG. 7;

FIG. 9 is a schematic view of a stator of the motor shown at another angle;

FIG. 10 is a cross-sectional view A-A of FIG. 9;

FIG. 11 is a diagram illustrating the assembly of the coil carrier and the pins in accordance with one embodiment;

FIG. 12 is a schematic structural view of the connector body prior to assembly;

FIG. 13 is a top view of the connector body of FIG. 12;

FIG. 14 is a schematic view of the pin and connector assembly prior to heat staking;

FIG. 15 is a schematic view of the pin and connector assembly after heat staking;

FIG. 16 is a schematic view of a typical motorized damper of the prior art;

FIG. 17 is a schematic view of the motor shown in FIG. 16;

fig. 18 is a sectional view a-a of fig. 17.

In fig. 1-15:

the gear box 10, the bottom plate 101, the mounting seat 102, the mounting shaft hole 1021, the positioning column 103, the top adapting section 1031, the bottom holding section 1032, the holding step 1033, the reinforcing rib 1034, the door frame 20, the door plate 30, the sealing plate 40, the motor 50, the rotor shaft 51, the rotor 52, the stator 53, the cover plate 531, the mounting portion 5311, the mounting hole 5312, the recess 5313, the housing 532, the cover plate mounting surface 5321, the protrusion 5322 and the process opening 5323, the connector 54, the connector body 541, the through hole 542, the heat-melting protrusion 543, the first heat-melting protrusion 543a, the second heat-melting protrusion 543b, the pin groove 544, the pin mounting groove 545, the pin 55, the first pin group 55a, the second pin group 55b, the inner section 551, the outer section 552, the bobbin 56, the upper coil bobbin 56a, the lower coil bobbin 56b, the pin fixing section 561, the pin leading-out surface 5611, the pole plate 57, the gear set 60, the final gear 61, the final gear shaft 62, and the gear shaft 63.

In fig. 16-18:

motor 01, rotor shaft 011, lower apron 012, upper cover 013, gear train 02, first order drive gear 021, gear box 03.

Detailed Description

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

Without loss of generality, the embodiment takes the typical electric damper shown in fig. 1 as a description main body, and the specific implementation structure of the transmission mechanism is explained in detail. It should be understood that other functional components and matching relations of the door plate, the door frame and the like of the electric air door are not the core invention point of the present application, and the technical scheme claimed by the present application is not limited substantially.

Referring to fig. 1, a schematic view of the motorized damper of the present embodiment is shown.

The door frame 20 of the electric air door is arranged on the gear box 10, an air duct matched with the door plate 30 is formed in the middle of the door frame 20, and the door plate 30 is hinged to one side of the door frame 20 and can rotate under the driving of a transmission mechanism in the gear box 10 to control the air duct to be in an open state shown in fig. 1 or switch to a through-flow state to be closed. In the closed position, a reliable seal is established by the seal plate 40 on the door panel 30 mating with the door frame 20.

Referring to fig. 2-4, fig. 2 is a schematic view illustrating an assembly relationship between the door panel shown in fig. 1 and the internal transmission mechanism, fig. 3 is a schematic view illustrating the transmission mechanism according to an embodiment, and fig. 4 is a top view of fig. 3.

The transmission mechanism disposed in the gear box 10 mainly includes a motor 50 and a gear set 60, wherein an output gear (not shown in the figure) is fixedly disposed on a rotor shaft 51 of the motor 50, a first-stage gear (not shown in the figure) of the gear set 60 is engaged with the output gear on the rotor shaft 51 of the motor, and a last-stage gear 61 is used for being in transmission connection with the damper door panel 30, and performs power transmission by reducing speed and increasing torque through the gear set 60. The "first stage" and the "last stage" are defined with reference to the power transmission path of the gear set 60, that is, the first stage gear that is in transmission connection with the output power of the motor 50, and the last stage gear that outputs the final drive power.

The stator 53 of the motor 50 is electrically connected to the connector 54 through pins to establish winding coils, and the corresponding coils are turned on based on a control command, and the rotor 52 is induced and rotated accordingly. The rotor shaft 51, which is synchronized with the rotor 52, outputs power to the gear set 60 through the output gear provided thereon, and drives the door panel 30 to rotate through the final gear shaft 62 of the gear set 60, thereby performing an opening or closing operation.

In this embodiment, the rotor shaft 51 of the motor 50 and each gear shaft 63 of the gear train 60 are disposed on the bottom plate 101 of the gear case 10. Thus, the distance between the shafts of the transmission mechanism is defined by the corresponding shaft mounting position on the base plate 101 of the gear box 10, see fig. 5, which is a schematic view of the structure of the gear box and shows the arrangement of the shafts on the base plate 101.

That is, the distance between the shafts is related to the dimension between the shaft mounting positions on the gear box 10, and there is no other tolerance stack between the two shafts having the transmission relationship, so that the precision of the distance between the shafts can be ensured, and the problem of abnormal noise caused by the tolerance stack in the operation of the air door can be avoided. In addition, because the dimension chain for controlling the distance between the shafts has no tolerance accumulation, the tolerance requirements of the corresponding rotating shaft and the corresponding gear can be properly reduced, and the processing cost can be effectively controlled on the basis of reasonably controlling the abnormal sound in operation.

It will be appreciated that three gear shafts 63 of the gear set 60 are shown. Of course, for different reduction ratios, multiple reduction stages can be specifically adopted according to the requirements of function setting, and the number of gear shafts is not limited in the figure.

In addition, the specific assembly structure of the rotor shaft 51 and each gear shaft 63 arranged on the bottom plate 101 of the gear box 10 can adopt different structural forms. For example, but not limited to, there is a mounting shaft hole 1021 on the base plate 101 that is configured correspondingly to the rotor shaft 51 and each gear shaft 63, as long as the corresponding shaft position can be accurately defined.

In the scheme, in order to obtain better assembly reliability, the corresponding mounting shaft hole 1021 can be formed through the mounting seat 102 fixedly arranged on the surface of the bottom plate 101, on the basis of not changing the thickness of the bottom plate 101, the positioning contact surface between the shaft and the shaft hole can be increased, the assembly stability and reliability of each shaft are ensured, and then the corresponding shaft position is accurately limited.

Here, the mount 102 may be integrally formed with the base plate 101 of the gear case 10, or may be fixed by a welding process using a separate process.

Preferably, in this embodiment, the output gear on the motor rotor shaft 21 is located below the rotor 52 of the motor 50. The output gear is axially close to the bottom plate 101 of the gear box 10, so that the load of the rotor 52 acting on the lower end of the rotor shaft 51 is relatively small, the possibility of running deflection is avoided to the maximum extent, and running noise is avoided. The term "axial" and "radial" in the following text, as used herein, is defined with respect to the motor stator and rotor as the main body.

With this solution, the rotor 52 and the stator 53 of the motor 50 can be respectively mounted on the gear box 10. Specifically, an axial insertion positioning pair is provided between the bottom plate 101 of the gear box 10 and the stator 53 of the motor 50. When the stator 53 is assembled to the base plate 101 in the axial direction, the stator 53 can be positioned by the pair of axial insertion positioning members, and the assembly accuracy of the rotor 52 and the stator 53 can be ensured. Please refer to fig. 6 and 7 together, wherein fig. 6 is a schematic view of the motor, and fig. 7 is a schematic view of an assembly relationship between the motor stator and the gear box.

The axial insertion positioning pair preferably adopts a matched column hole structure, one of the bottom plate 101 and the stator 53 is provided with a mounting hole, and the other is provided with a positioning column, so that the axial insertion positioning pair is constructed. Simple structure can accomplish the cartridge fast, and easily overhauls and maintains, has better maneuverability.

In this embodiment, the positioning column 103 is disposed on the base plate 101, and accordingly, the mounting hole 5312 is disposed on the stator 53. During assembly, the mounting hole 5312 on the stator 53 is aligned with the positioning column 103 on the bottom plate 101, and then insertion positioning can be completed; at the same time, the rotor 52 is positioned on the base plate 101 by the rotor shaft 51, keeping the stator part central bore concentric with the rotor part. Of course, to ensure the concentricity of the stator and the rotor, the mounting holes 5312 may be formed by punching after the motor is assembled.

Preferably, the axial insertion positioning pairs in the present embodiment are provided as two insertion positioning pairs arranged at intervals in the circumferential direction, and it should be understood that the insertion positioning pairs may be provided as a plurality of insertion positioning pairs as long as the installation and positioning requirements of the stator 53 are met.

Generally, the motor 50 requires high operation stability, and the fitting holes 5312 on the stator 53 and the positioning posts 103 on the base plate 101 can be further optimized to ensure a reliable assembly relationship under rotational inertia. As shown in fig. 6 and 7, the housing of the stator 53 is provided with a mounting portion 5311 extending radially outward, and a mounting hole 5312 adapted to the positioning post 103 is formed in the mounting portion 5311; here, the mounting portion 5311 is formed to extend radially and to the outside of the housing body, and the inner space of the gear case can be effectively utilized to control the height dimension.

Accordingly, the locating post 103 on the base plate 101 of the gearbox 10 comprises two parts: a top mating section 1031 and a bottom holding section 1032, wherein the top mating section 1031 mates with the mounting hole 5312 on the mounting portion 5311 to establish a radial limit relationship; and, form bearing step 1033 between top adaptation section 1031 and the 1032 bearing section of bottom, installation department 5311 is arranged in this bearing step 1033, constructs the spacing relation of axial, that is to say, the installation department 5311 after the equipment targets in place is taken over and is supported at this bearing step 1033, is convenient for control assembly precision, has better assembly manufacturability.

In addition, the body of the bottom bearer section 1032 has ribs 1034 formed extending radially outward to achieve good load bearing capacity. Of course, the number of the ribs 1034 can be set according to actual needs, such as but not limited to three as shown in the figure.

In this embodiment, the housing of the stator 53 is assembled by the housing 532 and the cover 531. Referring also to fig. 9, the overall assembly of the motor stator 53 is shown from another perspective. Specifically, the cover plate 531 is fixedly connected to the open end of the housing 532 to enclose a space for accommodating the stator coil, and here, the specific structure of the stator coil is not the core invention point of the present application, and therefore, the detailed description thereof is omitted.

As shown, at the open end of the housing 532, there are a cover plate mounting surface 5321 and a projection 5322, and accordingly, a mounting portion 5311 is formed extending radially outward from a plate body of the cover plate 531, and an outer periphery of the plate body of the cover plate 531 is fitted radially to an inner wall of the housing 532, thereby establishing a relative seal at the assembly fitting position. Of course, the outer periphery of the plate body of the cover 531 is at least partially radially engaged with the inner wall of the housing 532, thereby establishing the relative seal. The mounting portion 5311 axially abuts against a cover mounting surface 5321 at the open end of the housing 532, and the protrusion 5322 on the body of the housing 532 is bent inward by an external force, so as to press-fit and fix the plate of the cover 531. The cover 531 is assembled and fixed to the housing 532.

In this embodiment, the mounting portion 5311 serves to both fix and position the entire stator and to axially assemble and position the cover 531 and the housing 532. So set up, the splice seam uses the welded fastening mode of argon arc welding, laser welding etc. between the upper and lower motor housing that has replaced the motor, can improve production efficiency to the energy is saved. In addition, the motor can be assembled more conveniently, and automation is easier to realize.

Preferably, two protrusions 5322 are provided for each mounting portion 5311, and are provided on both sides of the cover mounting surface 5321 to which the mounting portions 5311 are fitted. The mounting portion 5311 serves as a stator mounting portion, and both sides thereof are press-fitted and fixed by the bent protrusions 5322, respectively, so that reliable fixation between the mounting portion and the bottom plate 101 of the gear case 10 can be ensured.

The protruding portion 5322 may have different shapes and structures, and it is within the scope of the present application to press fit the fixing cover 531. In addition, the protruding portion 5322 can be formed by different processing methods, in this embodiment, the protruding portion 5322 is formed by a process opening 5323 beside the cover plate mounting surface 5321, specifically, as shown in the figure, the process opening 5323 is disposed between the protruding portion 5322 and the housing 532 body beside the cover plate mounting surface 5321.

Likewise, the process opening 5323 can take on different shapes, such as, but not limited to, a "V" shaped opening as shown in the preferred example of the drawings.

In order to facilitate the bending operation of the protruding portion 5322, a concave portion 5313 may be provided on the outer periphery of the plate body of the cover plate 531 to avoid interference between the protruding portion 5322 and the cover plate 531 during the bending operation. As shown in fig. 9, the concave portion 5313 is formed radially inward, and is specifically disposed at a position adjacent to the mounting portion 5311 on the outer peripheral edge of the plate body, so as to avoid or thermally fuse the deformation of the convex portion 5322 during bending, thereby avoiding the influence of the pressing force applied to the cover plate 531 on the mounting portion 5311, and ensuring the assembly precision between the cover plate and the positioning post 103.

Preferably, the recess is inwardly arcuate to avoid stress concentrations.

In addition, the connecting structure of the contact pin and the connector can be further optimized so as to reduce parts and assembly procedures. Referring to fig. 10, 11, 12 and 13, fig. 10 is a sectional view taken along a-a of fig. 9, fig. 11 shows an assembly relationship between a coil support and a pin, fig. 12 is a structural diagram of a connector body before assembly, and fig. 13 is a top view of the connector body shown in fig. 12.

In the scheme, the motor stator comprises a stator coil, a pin 55 and a connector 54, wherein an enameled wire winding is wound on a framework 56 of the stator coil, and a corresponding polar plate 57 is arranged between the upper framework 56 and the lower framework 56. It is understood that the winding mechanism of the enameled wire on the stator coil is not the core invention point of the present application, and therefore, the description thereof is omitted.

Specifically, the frame 56 has a pin fixing portion 561 for fixing the corresponding pin 55, as shown in fig. 11, the inner section 551 of the pin 55 is inserted into the frame 56 to form a coil conductive terminal conductively connected to the winding outlet, and the outer section 552 of the pin 55 is protruded from a pin leading-out surface 5611 of the pin fixing portion 561 for directly connecting with the connector 54; the outer section 552 is shown in an unfolded state in FIG. 11. As shown in fig. 12 and 13, the connector body 541 has a through hole 542 communicating with the connection cavity, and the outer segment 552 of the pin 55 is inserted into the connection cavity of the connector 54 through the through hole 542 to form a conductive terminal of the connector. It can be understood that the "inner section" and the "outer section" of the pin 55 refer to the stator defined as the description main body, that is, the body of the pin 55 inserted into one end of the skeleton 56 is the "inner section", and the body of the other end away from the skeleton 56 is the "outer section".

In the scheme, one end of the contact pin 55 is inserted into the framework 56 and connected with the framework 56, and the wire outlet end of the enameled wire winding is connected with one end of the contact pin and can be connected and conducted through tin soldering. The other end of the pin 55 is inserted into the connector 54 and connected to the connector body 541, where the portion of the pin 55 extending into the connection cavity of the connector 54 constitutes a conductive terminal of the connector 54, thereby achieving electrical connection with an external terminal.

Compared with the connection mode of the switching PCB and the fixing frame, the switching PCB and the fixing frame are omitted, and on the basis, the procedures of welding the winding wire outlet end and the circuit board and welding the conductive terminal of the connector and the circuit board are omitted. So set up, reduced spare part and assembly process, provide good technical guarantee for improving production efficiency, saving cost.

In order to improve the connection reliability between the pin and the connector body, preferably, a heat-fusible convex portion 543 is arranged on the outer surface of the connector body 541, the heat-fusible convex portion 543 has a pin groove 544 arranged in the same direction as the body of the pin 55, the body of the pin 55 can be clamped in the pin groove 544, and the heat-fusible convex portion 543 can be heat-fused and solidified to cover the pin 55 at the corresponding position, so as to fix the corresponding pin 55 to the connector body 541 reliably, and prevent the pin 55 from being separated from the connector body 541 when the connector 54 is plugged. Please refer to fig. 14 and fig. 15, wherein fig. 14 is a schematic view of an assembly relationship between a pin and a connector before heat-sealing, and fig. 15 is a schematic view of an assembly relationship between a pin and a connector after heat-sealing.

It should be noted that the thermal fusing protrusions can be disposed at different positions on the connector body 541 according to different product types and specific assembly orientations thereof. For example, but not limited to, the preferred arrangement shown in the figures, the heat-fusible protrusions 543 are disposed on the bottom surface of the connector body 541, which facilitates the overall layout of the connector body inside the gear box and reduces the space consumption.

A pin mounting groove 545 communicating with the insertion hole 542 is formed on the bottom surface of the connector body 541 at a position corresponding to the heat-fusible protrusion 543, the groove direction of the pin mounting groove 545 is perpendicular to the hole opening direction of the insertion hole 542, and accordingly, the body portion of the connector conductive terminal is formed by bending the head of the outer section 552 of the pin 55. That is, the body of the pin 55 is fitted into the connector body 541 to be positioned as a base, and the pin 55 is fixed to the bottom surface of the connector body 541 by being thermally fused by the thermally fusing projection 543.

In order to obtain good hot-melting manufacturability, two hot-melting convex parts 543 are arranged at intervals along the length direction of the body of the pin 55: a first heat-melting projection 543a and a second heat-melting projection 543b, wherein the first heat-melting projection 543a is disposed at the edge of the bottom surface of the connector body 541 near the stator coil side, and the second heat-melting projection 543b is disposed at the position where the pin mounting groove 545 on the bottom surface of the connector body 541 communicates with the mounting hole 542.

In general, the present solution provides two heat staking points for the pin 55 disposed at the ends of the pin mounting slot 545. Of course, according to different product design requirements, such as a large-sized connector, a plurality of other heat-melting protrusions 543 (not shown) may be disposed at intervals along the length direction of the body of the pin 55.

Specifically, the first heat-melting protrusion 543a includes two strips located on two sides of the pin slot 544, so that the structure is simple and the heat-melting solidification can be performed rapidly. The second heat-fusible convex portion 543b is bent in a U shape around the end of the pin mounting groove 545, and covers and fixes the pin 55 at the position where the pin mounting groove 545 communicates with the insertion hole 542 well.

In the scheme, aiming at an upper coil framework 56a and a lower coil framework 56b of a motor stator, pins are divided into a first pin group 55a connected with the upper coil framework and a second pin group 55b connected with the lower coil framework; the first pin group 55a which is passed out from the pin outlet face 5611 of the upper coil bobbin 56a and the second pin group 55b which is passed out from the pin outlet face 5611 of the lower coil bobbin 56b are arranged in the same plane at intervals in order. Here, the pins 55 are staggered at intervals to fully utilize the height dimension space, and at the same time, the extension of the pins 55 in the same plane is beneficial to the design of the adapting structure of the connector body 541.

It should be noted that, in the above embodiments provided in this embodiment, other functions of the transmission mechanism are not the core points of the present application, and therefore, no further description is provided herein. The number of teeth of each tooth of the transmission mechanism is only exemplary in the drawings, and it should be understood that the technical means consistent with the core concept of the scheme is adopted in the scope of the claims of the present application.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims (10)

1. The motor stator is characterized by comprising a shell and a stator coil arranged in the shell; the shell comprises a shell body and a cover plate, wherein the cover plate is fixedly connected with the open end of the shell body so as to enclose a space for accommodating the stator coil; the open end has apron installation face and convex part, the apron has the installation department that forms from the radial outside extension of plate body, the plate body periphery of apron along at least part with the inner wall of casing is radially laminated, the installation department with apron installation face axial is taken up to, and by for the body of casing is bent the convex part pressfitting is fixed the plate body of apron.

2. The stator of an electric machine according to claim 1, wherein the mounting portions are at least two circumferentially spaced apart and circumferentially spaced apart; and the installation parts are correspondingly provided with two convex parts which are respectively arranged at two sides of the cover plate installation surface and matched with the installation parts.

3. The stator as claimed in claim 2, wherein the cover plate has a recess formed radially inward at a position adjacent to the mounting portion on an outer peripheral edge of the plate body.

4. An electric machine stator according to claim 3, wherein the recess is in the form of an inner arc.

5. The electric machine stator of any one of claims 2 to 4, wherein the boss has a process opening between it and the body of the housing alongside the cover mounting surface.

6. The electric machine stator of claim 5, wherein the process openings are "V" shaped openings.

7. The stator of claim 6, wherein the mounting portion extends radially outward to the outside of the body of the housing, and a mounting hole or a positioning post for forming a stator insertion positioning pair is provided on the mounting portion located on the outside.

8. A transmission mechanism is characterized by comprising a motor and a gear set, wherein the motor and the gear set are arranged in a gear box, the motor adopts a motor stator as claimed in any one of claims 1 to 7, an output gear is fixedly arranged on a rotor shaft of the motor, a first-stage gear of the gear set is meshed with the output gear, and a last-stage gear of the gear set is used for being in transmission connection with a throttle plate; an axial plug-in positioning pair is arranged between the bottom plate of the gear box and the stator of the motor.

9. The transmission mechanism as recited in claim 8, wherein the rotor shaft and each gear shaft of the gear set are disposed on a bottom plate of the gearbox.

10. The transmission mechanism according to claim 9, wherein the output gear is located below a rotor of the motor, a positioning column constituting the axial insertion positioning pair is disposed on the bottom plate, and the mounting portion of the motor stator is provided with a mounting hole adapted to the positioning column.

Images