Electronic fan motor and assembling method thereof

Abstract

The invention relates to an electronic fan motor and an assembling method thereof.The electronic fan motor comprises a stator, a rotor, a motor shaft and a machine shell, a rotation stopping groove is formed in the outer wall of the stator, a protruding block is arranged on the inner wall of the machine shell, one end of a positioning framework is connected with a control circuit board, and the rear end of the machine shell is connected with a rear cover. The control circuit board is installed on the stator in a matched mode, the overall structure is reasonable, and during installation, the motor shaft provided with the bearing is pressed into the rotor through a servo press; the control circuit board is mounted on the stator by taking the positioning columns and the positioning holes as references; the rotation stopping groove of the stator and the protruding block of the machine shell are pressed into the machine shell to be connected. The rotor and the bearing are mounted in the stator in a penetrating manner; applying sealant to the rear cover by using an automatic gluing machine, pressing the rear cover and the casing tightly by using a tool, welding by using a laser welding machine, and fixing the silica gel bushing between the casing and the rear cover; the two elastic damping washers are installed on the two bearing chamber outer rings respectively, installation is easy and convenient, and the installation efficiency can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to an electronic fan motor and an assembly method thereof. Background Art

[0002] With the development of science and technology, cars are also gradually updated. Electronic fans are part of cars. Motors are the driving mechanism of electronic fans, which dissipate heat from the water tank connected to the engine or the air conditioner condenser and evaporator, as well as heat exchange. During the operation of the car, the car will vibrate, so that the electronic fan of the car will work in a long-term vibration environment, which is easy to cause the bolts and nuts to loosen, and then cause the electronic fan motor to loosen, resulting in irreversible quality accidents and economic losses. In the prior art, in order to prevent the bolts and nuts from loosening, a drop of anaerobic glue is usually dripped at the junction of the nut and the bolt thread to reinforce it to avoid the problem of loosening. However, the use of dripping anaerobic glue to prevent the problem of bolts and nuts loosening, however, the connection of the overall structure by bolts and nuts will limit the connection area of ​​components such as the stator, rotor, and casing, resulting in unreasonable structure. In addition, during the overall processing and installation of the motor, it will increase labor and material costs and reduce production efficiency. Summary of the invention

[0003] The object of the present invention is to provide an electronic fan motor and an assembly method thereof, which connects the stator and the casing as a whole by using a concave-convex fit, and a control circuit board is installed on the stator, so the overall structure is reasonable, the installation is simple and convenient, and the installation efficiency can be effectively improved.

[0004] In order to solve the above technical problems, the present invention is solved through the following technical solutions: an electronic fan motor, including a stator, a rotor is provided in the middle of the stator, a motor shaft is provided in the middle of the rotor, a casing is provided outside the stator, a stop groove is provided on the outer wall of the stator, a protrusion is provided on the inner wall of the casing and is matched with the stop groove, a control circuit board is connected to one end of the stator, and a back cover is connected to the rear end of the casing.

[0005] Preferably, a positioning column is provided at one end of the stator, and a positioning hole is provided on the control circuit board to cooperate with the positioning column.

[0006] Further preferably, a stator axial positioning point is provided on the outer wall of the casing close to the position of the protrusion.

[0007] Further preferably, the motor shaft and the rotor are interference connected via ribs.

[0008] Further preferably, a bearing chamber for bearing installation is formed in the middle of the inner wall of the housing and the rear cover, and elastic shock-absorbing washers are sleeved outside the two bearing chambers.

[0009] Further preferably, the housing is provided with a bayonet, and a silicone wire protection sleeve is clamped between the bayonet and the back cover to facilitate the wire to pass through.

[0010] Further preferably, the housing and the back cover are connected by welding.

[0011] A method for assembling an electronic fan motor comprises the following steps: First put the bearing and rotor in place, then use a servo press to press the motor shaft into the hole around the rotor (with bearings); finally, press the bearings into the corresponding positions at both ends of the rotor.

[0012] b. First, wind the stator with the winding machine according to the slot position, then install the control circuit board on the stator based on the positioning column and positioning hole, and weld the wires between the control circuit board and the stator; c. Based on the axial positioning point of the stator, align the anti-rotation groove of the stator with the convex block of the casing and press the tooling in to connect the stator and the casing; d. Install the finished rotor assembly with the motor shaft and bearing pressed into the stator; e. First, insert the silicone wire protection sleeve with the lead wire into the bayonet of the casing, then apply a circle of sealant on the back cover with an automatic glue-applying machine, then press the back cover and the casing tightly with a tool, and then weld with a laser welder to fix the silicone wire protection sleeve between the casing and the back cover; f. Finally, install the two elastic shock-absorbing washers on the outer rings of the bearings at both ends.

[0013] Further preferably, the casing and the back cover are made of galvanized sheet or ordinary cold-rolled sheet, and the thickness of the casing and the back cover is 0.5-2.0 cm.

[0014] Further preferably, the elastic shock-absorbing gasket is made of rubber or silicone.

[0015] The invention has the following beneficial effects: it comprises a stator, a rotor is arranged in the middle of the stator, a motor shaft is arranged in the middle of the rotor, a casing is arranged outside the stator, a rotation-stopping groove is provided on the outer wall of the stator, a convex block is arranged on the inner wall of the casing and is matched with the rotation-stopping groove, a control circuit board is connected to one end of the stator, and a rear cover is connected to the rear end of the casing. By integrally connecting the stator and the casing with a concave-convex fit, and matching the control circuit board with the stator, the overall structure is reasonable. When installing, first put the bearing and the rotor in place, and use a servo press to press the shaft. The motor shaft is pressed into the rotor; the control circuit board is installed on the stator based on the positioning column and the positioning hole; the anti-rotation groove of the stator is aligned with the protrusion of the casing and the tooling is pressed into the casing for connection; the rotor and the bearing are inserted into the stator and installed; a circle of sealant is applied on the back cover with an automatic gluing machine, and then the back cover and the casing are pressed tightly with a tooling, and then welded with a laser welder, and the silicone wire cover is fixed between the casing and the back cover; finally, the two elastic shock-absorbing washers are respectively installed on the outdoor rings of the bearings at both ends. This is simple and convenient to install and can effectively improve the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 It is a schematic diagram of the decomposition structure of the present invention.

[0018] Figure 3 It is a cross-sectional view of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] like Figure 1-3 As shown, an electronic fan motor and an assembly method thereof include a stator 1, a rotor 2 is provided in the middle of the stator 1, a motor shaft 3 is provided in the middle of the rotor 2, the motor shaft 3 and the rotor 2 are interference connected by punching ribs, a casing 4 is provided outside the stator 1, a stop groove 5 is provided on the outer wall of the stator 1, a protrusion 6 matched with the stop groove 5 is provided on the inner wall of the casing 4, a control circuit board 7 is connected to one end of the stator 1, and a back cover 8 is connected to the rear end of the casing 4. The stator 1 and the casing 4 are integrally connected by a concave-convex fit, and the control circuit board 7 is mounted on the stator 1, so the overall structure is reasonable.

[0021] In this embodiment, a positioning column 9 is provided at one end of the stator 1, and a positioning hole 10 is provided on the control circuit board 7 for cooperation with the positioning column 9. The cooperation between the positioning hole 10 and the positioning column 9 facilitates the installation of the control circuit board 7 on one end of the stator 1 frame.

[0022] In this embodiment, a stator axial positioning point 11 is further provided on the outer wall of the casing 4 near the position of the protrusion 6. The stator axial positioning point 11 facilitates quick installation of the stator 1 and the casing 4 by intuitively using the stator axial positioning point 11 as a reference when installing the stator 1 and the casing 4.

[0023] In this embodiment, a bearing chamber for installing a bearing 14 is formed in the middle of the inner wall of the casing 4 and the rear cover 8, and elastic shock-absorbing washers 12 are sleeved outside the two bearing chambers. The elastic shock-absorbing washers 12 can effectively reduce shock when the car is started or the motor is working, thereby increasing the service life of the electronic fan motor.

[0024] In this embodiment, the housing 4 is provided with a bayonet, and a silicone wire sheath 13 is clamped between the bayonet and the back cover 8 for easy wire threading. The silicone wire sheath 13 is provided with a plurality of threading holes for easy connection of the wire with the stator 1 or the control circuit board 7.

[0025] A method for assembling an electronic fan motor comprises the following steps: a. First put the bearing 14 and the rotor 2 in place, then use a servo press to press the motor shaft 3 into the hole around the rotor 3 (with the bearing 14); finally, press the bearing 14 to the corresponding positions at both ends of the rotor 2; b. First, wind the stator 1 with the winding machine according to the slot position, then install the control circuit board 7 on the stator 1 according to the positioning column 9 and the positioning hole 10, and weld the wires between the control circuit board 7 and the stator 1; c. Based on the stator axial positioning point 11, align the anti-rotation groove 5 of the stator 1 with the protrusion 6 of the housing 4 and press the tooling in to connect the stator 1 with the housing 4; d. Install the finished rotor assembly with the motor shaft 3 and the bearing 14 pressed into the stator 1; e. First, install the silicone wire sheath 13 with the lead wires inserted into the hole into the bayonet of the housing 4, then apply a circle of sealant on the back cover 8 with an automatic glue-applying machine, then press the back cover 8 and the housing 4 tightly with a tool, and then weld with a laser welder to fix the silicone wire sheath 13 between the housing 4 and the back cover 8; f. Finally, install the two elastic shock-absorbing washers 12 on the outer rings of the bearings at both ends respectively.

[0026] In this embodiment, the housing 4 and the back cover 8 are made of galvanized sheet or ordinary cold-rolled sheet, the thickness of the housing 4 and the back cover 8 is 0.5-2.0 cm, and the material of the elastic shock-absorbing gasket 12 is rubber or silicone.

[0027] According to the concept of the present invention, there may be changes in the specific implementation method and application scope, and the content of this specification should not be understood as limiting the present invention.

Claims

1. An electronic fan motor, characterized in that: It includes a stator, a rotor is provided in the middle of the stator, a motor shaft is provided in the middle of the rotor, a casing is provided outside the stator, a stop groove is provided on the outer wall of the stator, a protrusion is provided on the inner wall of the casing and is matched with the stop groove, a control circuit board is connected to one end of the stator, and a rear cover is connected to the rear end of the casing.

2. The electronic fan motor according to claim 1, characterized in that: A positioning column is provided at one end of the stator, and a positioning hole is provided on the control circuit board for matching and connecting with the positioning column.

3. The electronic fan motor according to claim 1, characterized in that: The outer wall of the casing is also provided with a stator axial positioning point close to the position of the protrusion.

4. The electronic fan motor according to claim 1, characterized in that: The motor shaft and the rotor are interference connected via punching ribs.

5. An electronic fan motor according to claim 1, characterized in that: The middle parts of the inner walls of the housing and the rear cover are both formed with bearing chambers for installing bearings, and elastic shock-absorbing washers are sleeved outside the two bearing chambers.

6. The electronic fan motor according to claim 1, characterized in that: The housing is provided with a bayonet, and a silicone wire protection sleeve is clamped between the bayonet and the back cover to facilitate the wire to pass through.

7. The electronic fan motor according to claim 1, characterized in that: The housing and the back cover are connected by welding.

8. A method for assembling an electronic fan motor, characterized in that: The following steps are involved: a. First put the bearing and rotor in place, then use a servo press to press the motor shaft into the peripheral hole of the rotor (with bearing); finally, press the bearings into the corresponding positions at both ends of the rotor; b. First, wind the stator with the winding machine according to the slot position, then install the control circuit board on the stator based on the positioning column and positioning hole, and weld the wires between the control circuit board and the stator; c. Based on the axial positioning point of the stator, align the anti-rotation groove of the stator with the convex block of the casing and press the tooling in to connect the stator and the casing; d. Install the finished rotor assembly with the motor shaft and bearing pressed into the stator; e. First, install the silicone wire protection sleeve with the lead wire into the bayonet of the casing, then apply a circle of sealant on the back cover with an automatic glue-applying machine, then press the back cover and the casing tightly with a tool, and then weld with a laser welder to fix the silicone wire protection sleeve between the casing and the back cover; f. Finally, install the two elastic shock-absorbing washers on the outer rings of the bearings at both ends.

9. The method for assembling an electronic fan motor according to claim 8, characterized in that: The casing and the back cover are made of galvanized sheet or common cold-rolled sheet, and the thickness of the casing and the back cover is 0.5-2.0 cm.

10. The method for assembling an electronic fan motor according to claim 9, characterized in that: The elastic shock-absorbing gasket is made of rubber or silicone.

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