Motor with rotor independent of front cover

Abstract

The invention relates to the technical field of motors, in particular to a motor with a rotor independent of a front cover, which comprises a motor shell and the front cover, one side of the front cover is connected with a rotor sleeve, a rotor assembly is arranged in the rotor sleeve, a motor shaft of the rotor assembly extends out of the front cover, and the rotor assembly is connected to the front cover through the rotor sleeve. The rotor assembly can rotate in the rotor sleeve; a stator assembly is arranged in the motor shell, the shape and size of the rotor sleeve are matched with the shape and size of a stator center hole of the stator assembly, the rotor sleeve is arranged in the stator center hole in a sliding fit mode, and the front cover is fixedly connected to the front end of the motor shell. Compared with the prior art, according to the motor with the rotor independent of the front cover, the rotor is independent of the front cover part of the motor and can rotate smoothly, the problem of non-concentricity caused by strong magnetic attraction force does not exist during assembly, the rotor part is easily installed in the stator during motor assembly, the assembly efficiency is high, and safety and reliability are achieved; the device is especially suitable for solving the problems of safety, assembly operability, production efficiency and the like in the assembly process of the large-scale strong magnetic motor.

Description

[Technical field]

[0001] The invention relates to the technical field of motors, in particular to a motor with a rotor independent of a front cover. [Background technology]

[0002] The motor of the prior art is divided into 4 parts:

[0003] The first part: the front cover and the bearing inside the front cover, which constitute the front cover part of the motor;

[0004] The second part: the shaft, rotor core, magnet, magnetic steel sleeve, balance sleeve, etc., constitute the rotor part of the motor;

[0005] The third part: stator core, bobbin, stator winding, terminal block, casing, etc., which constitute the stator part of the motor;

[0006] The fourth part: the rear cover and the bearing inside the rear cover, etc., constitute the rear cover part of the motor;

[0007] During assembly, the rotor part is installed into the stator. Due to the suction of the rotor magnet, the rotor is adsorbed on one side of the stator, resulting in the front cover or the rear cover part being difficult to obtain concentricity, making assembly difficult and dangerous. The bearings in the front and rear covers are easily damaged, and the production efficiency is low. Or assembly can only be done with the help of work clamps. As the motor torque increases, the strong magnetic suction on the motor rotor becomes stronger, and the difficulty and danger increase. [Summary of the invention]

[0008] In order to overcome the above problems, the present invention proposes a motor in which a rotor is independent of a front cover and can effectively solve the above problems.

[0009] A technical solution provided by the present invention to solve the above technical problems is: to provide a motor with a rotor independent of the front cover, comprising a motor housing and a front cover, wherein a rotor sleeve is connected to one side of the front cover, a rotor assembly is arranged in the rotor sleeve, a motor shaft of the rotor assembly extends out of the front cover, the rotor assembly is connected to the front cover through the rotor sleeve, and the rotor assembly can rotate in the rotor sleeve; a stator assembly is arranged in the motor housing, the shape and size of the rotor sleeve match the shape and size of the stator center hole of the stator assembly, the rotor sleeve is slidably fitted in the stator center hole, and the front cover is fixedly connected to the front end of the motor housing.

[0010] Preferably, a front end bearing is connected to one side of the front cover, a rear end bearing is arranged on the inner side of the rotor sleeve, one end of the motor shaft passes through the front end bearing, and the other end of the motor shaft passes through the rear end bearing.

[0011] Preferably, a front mounting groove is provided on one side of the front cover, a rear mounting groove is provided on the inner side of the rotor sleeve, the front end bearing is fixed in the front mounting groove, and the rear end bearing is fixed in the rear mounting groove.

[0012] Preferably, the rotor sleeve can be connected to the front cover of the motor by means of threads or tight fit.

[0013] Preferably, the rear end of the motor housing is connected to a rear cover, a positioning hole matching one end of the rotor sleeve is provided in the rear cover, and one end of the rotor sleeve is inserted into the positioning hole.

[0014] Preferably, a wave spring is provided between the front end bearing and the front cover.

[0015] Preferably, the rotor assembly comprises a rotor core, a magnet and a balancing sleeve. The rotor core is tightly pressed on the motor shaft, the magnet is glued to the outer periphery of the rotor core, and balancing sleeves are provided at both ends of the rotor core, which are glued to the rotor core with glue.

[0016] Preferably, the stator assembly comprises a bobbin, on which enameled wire is wound, a stator core is arranged inside the bobbin, and the bobbin is glued or heat-fitted or tightly fitted into the motor housing.

[0017] Preferably, a wiring board is arranged at the rear side of the wire rack, the enameled wire is welded to the wiring board, a driving board is arranged in the rear cover, and the wiring board is welded to the driving board through leads.

[0018] Preferably, the rear cover comprises a rear tail cover and a rear end cover, the rear tail cover is fixedly connected to the motor housing, and the rear end cover is fixed to one side of the rear tail cover.

[0019] Compared with the prior art, the rotor of the present invention is independent of the motor on the front cover, and the rotor is independent of the front cover part of the motor and can rotate smoothly. There is no problem of eccentricity caused by strong magnetic attraction during assembly. When the motor is assembled, the rotor part is easy to be installed in the stator. The assembly efficiency is high and it is safe and reliable. It is particularly suitable for solving the problems of safety, assembly operability and production efficiency during the assembly process of large strong magnetic motors.

Brief Description of the Drawings

[0020] Figure 1 A three-dimensional diagram of a motor in which the rotor of the present invention is independent of the front cover;

[0021] Figure 2 A top view of a motor in which the rotor of the present invention is independent of the front cover;

[0022] Figure 3 A bottom view of the motor of the present invention in which the rotor is independent of the front cover;

[0023] Figure 4 An axial cross-sectional view of a motor in which the rotor of the present invention is independent of the front cover;

[0024] Figure 5 An exploded view of a motor in which the rotor is independent of the front cover of the present invention;

[0025] Figure 6 This is a diagram showing the rotor assembly and the front cover of a motor in which the rotor is independent of the front cover;

[0026] Figure 7 It is an axial cross-sectional view of the rotor assembly and the front cover of the motor of the present invention in which the rotor is independent of the front cover and is assembled as one;

[0027] Figure 8 It is an axial cross-sectional view of a rotor assembly of a motor in which the rotor is independent of the front cover of the present invention;

[0028] Fig. 9 This is a diagram showing the integrated assembly of the stator assembly and the rear cover of the motor in which the rotor is independent of the front cover of the present invention. [Specific implementation method]

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] It should be noted that in the embodiments of the present invention, all directional indications (such as up, down, left, right, front, back, etc.) are limited to relative positions on the specified view, rather than absolute positions.

[0031] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] See also Figures 1 to 9 The rotor of the present invention is independent of the motor on the front cover, and includes a motor housing 10 and a front cover 20. A rotor sleeve 50 is connected to one side of the front cover 20. A rotor assembly is arranged in the rotor sleeve 50. The motor shaft 40 of the rotor assembly extends out from the front cover 20. The rotor assembly is connected to the front cover 20 through the rotor sleeve 50, and the rotor assembly can rotate smoothly in the rotor sleeve 50.

[0033] The motor housing 10 is provided with a stator assembly, the shape and size of the rotor sleeve 50 match the shape and size of the stator center hole 61 of the stator assembly, the rotor sleeve 50 is slidably fitted in the stator center hole 61, and the front cover 20 is fixedly connected to the front end of the motor housing 10.

[0034] A front bearing 21 is connected to one side of the front cover 20, a rear bearing 54 is arranged on the inner side of the rotor sleeve 50, one end of the motor shaft 40 passes through the front bearing 21, and the other end of the motor shaft 40 passes through the rear bearing 54. The motor rotor is fixed to the front cover 20 through the rotor sleeve 50, and with the support of the front and rear bearings, the rotor can rotate smoothly. A wave spring 22 is arranged between the front bearing 21 and the front cover 20 to provide preload force for the front bearing 21.

[0035] A front mounting groove is disposed on one side of the front cover 20 , a rear mounting groove is disposed on the inner side of the rotor sleeve 50 , the front end bearing 21 is fixed in the front mounting groove, and the rear end bearing 54 is fixed in the rear mounting groove.

[0036] The rotor sleeve 50 can be connected to the front cover 20 of the motor by threads or tight fit.

[0037] The rotor assembly includes a rotor core 51, a magnet 52 and a balancing sleeve 53. The rotor core 51 is tightly pressed on the motor shaft 40. Strong magnets 52 are glued to the outer periphery of the rotor core 51. Balancing sleeves 53 are provided at both ends of the rotor core 51. The balancing sleeves 53 are also glued to the rotor core 51 with glue. The balancing sleeves 53 are used to balance the rotor so that the motor rotates smoothly.

[0038] The rear end of the motor housing 10 is connected to a rear cover 30 . A positioning hole 34 matching one end of the rotor sleeve 50 is provided in the rear cover 30 . One end of the rotor sleeve 50 is inserted into the positioning hole 34 .

[0039] The motor housing 10 is provided with a stator assembly, which includes a bobbin 62 , on which enameled wire is wound, and a stator core 63 is provided inside the bobbin 62 . The bobbin 62 is glued or heat-fitted or tightly fitted into the motor housing 10 .

[0040] A terminal block 64 is disposed at the rear side of the wire rack 62, and the enameled wire is welded to the terminal block 64. A driving board 33 is disposed in the rear cover 30, and the terminal block 64 is welded to the driving board 33 through lead wires, and these parts together constitute the stator part of the motor. The terminal block 64 is fixed to the wire rack 62 by glue.

[0041] The rear cover 30 includes a rear tail cover 31 and a rear end cover 32 . The rear tail cover 31 is fixedly connected to the motor housing 10 , and the rear end cover 32 is fixed to one side of the rear tail cover 31 .

[0042] The driving plate 33 is fixedly connected to the rear cover 31 .

[0043] The rotor of the present invention is independent of the motor on the front cover, and the outer diameter of the rotor sleeve 50 is slidably matched with the inner diameter of the stator. During assembly, the front cover with the rotor is installed into the stator part of the motor, and then the front cover is fixed to the housing with screws or tight fit or glue, and the motor is assembled. During this process, the rotor will not be sucked to one side of the stator due to the suction of the magnet, and the assembly is safe and simple.

[0044] Compared with the prior art, the rotor of the present invention is independent of the motor on the front cover, and the rotor will not be sucked on one side of the stator during assembly, so the assembly is safe and simple; the rotor can rotate independently of the front cover of the motor, and there will be no damage to parts such as bearings during the assembly process, and the yield rate of good products is high; the concentricity of the rotor is ensured by the matching of the outer diameter of the rotor sleeve with the inner diameter of the stator, so there is no need to worry about poor assembly or injury to the hands, and the production efficiency is high.

[0045] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any modifications, equivalent substitutions and improvements made within the concept of the present invention should be included in the patent protection scope of the present invention.

Claims

1. The rotor is independent of the motor on the front cover, characterized in that: It comprises a motor housing and a front cover, wherein one side of the front cover is connected to a rotor sleeve, a rotor assembly is arranged in the rotor sleeve, a motor shaft of the rotor assembly extends out of the front cover, the rotor assembly is connected to the front cover through the rotor sleeve, and the rotor assembly can rotate in the rotor sleeve; The motor housing is provided with a stator assembly, the shape and size of the rotor sleeve match the shape and size of the stator center hole of the stator assembly, the rotor sleeve is slidably fitted in the stator center hole, and the front cover is fixedly connected to the front end of the motor housing.

2. The motor with a rotor independent of the front cover as claimed in claim 1, characterized in that: A front end bearing is connected to one side of the front cover, a rear end bearing is arranged on the inner side of the rotor sleeve, one end of the motor shaft passes through the front end bearing, and the other end of the motor shaft passes through the rear end bearing.

3. The motor with a rotor independent of the front cover as claimed in claim 2, characterized in that: A front mounting groove is arranged on one side of the front cover, a rear mounting groove is arranged on the inner side of the rotor sleeve, the front end bearing is fixed in the front mounting groove, and the rear end bearing is fixed in the rear mounting groove.

4. The motor with a rotor independent of the front cover as claimed in claim 1, characterized in that: The rotor sleeve can be connected to the front cover of the motor by thread or tight fit.

5. The motor with a rotor independent of the front cover as claimed in claim 1, characterized in that: The rear end of the motor housing is connected with a rear cover, and a positioning hole matching one end of the rotor sleeve is arranged in the rear cover, and one end of the rotor sleeve is inserted into the positioning hole.

6. The motor with a rotor independent of the front cover as claimed in claim 2, characterized in that: A wave spring is arranged between the front end bearing and the front cover.

7. The motor with a rotor independent of the front cover as claimed in claim 1, characterized in that: The rotor assembly comprises a rotor core, a magnet and a balancing sleeve. The rotor core is tightly pressed on the motor shaft, a magnet is adhered to the outer periphery of the rotor core, and balancing sleeves are arranged at both ends of the rotor core, and the balancing sleeves are adhered to the rotor core with glue.

8. The motor with a rotor independent of the front cover as claimed in claim 5, characterized in that: The stator assembly comprises a bobbin, an enameled wire is wound around the bobbin, a stator core is arranged inside the bobbin, and the bobbin is glued or heat-coated or tightly fitted in the motor housing.

9. The motor with a rotor independent of the front cover as claimed in claim 8, characterized in that: A wiring board is arranged at the rear side of the wire rack, and the enameled wire is welded on the wiring board. A driving board is arranged in the rear cover, and the wiring board is welded on the driving board through leads.

10. The motor with a rotor independent of the front cover as claimed in claim 5, characterized in that: The rear cover comprises a rear tail cover and a rear end cover, the rear tail cover is fixedly connected to the motor housing, and the rear end cover is fixed to one side of the rear tail cover.

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