Motor rear cover and driving integrated motor

Abstract

The utility model discloses a motor rear cover, comprising a first surface and a second surface used for installing a driving circuit substrate, the first surface is provided with a first chamber used for accommodating a motor stator, and the second surface is provided with a second chamber used for accommodating electronic components on the driving circuit substrate. According to the motor rear cover, a motor driving circuit can be integrated, the compactness of a motor structure is improved, the size of the motor is reduced, space can be saved when the motor is arranged, and the motor is dustproof, waterproof and attractive in appearance. The utility model also discloses a driving integrated motor.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and specifically relates to a motor back cover and a drive integrated motor. Background Art

[0002] The motor generally includes a housing and a stator and rotor installed in the housing, and a motor back cover is installed at the rear end of the housing. The motor is generally used with a matching driver. Some usage scenarios that require high motor precision will also be equipped with an encoder for closed-loop control. The motor drive circuit includes an aluminum substrate, on which a drive circuit PCB board and two electrolytic capacitors are fixed. The drive circuit PCB board is provided with a magnetic encoder chip. The encoder has developed from an initial encoder with an accuracy of 2000 lines to an encoder with an accuracy of more than 24 bits (equivalent to 16 million lines). The encoder has high accuracy and the encoder orthogonal signal density reaches the nanosecond level, but signal transmission becomes a problem, so there is an urgent need for a motor with an encoder and motor drive integrated.

[0003] The existing motor is still divided into two parts in structure, the front is the motor body part, and the back is the driving part, and then the two parts are spliced ​​together by connection. The motor made by this splicing method is generally large in size, occupies a large layout space when used, and there is a gap at the splicing of the motor body part and the driving part. The connecting wires between the motor body part and the driving part are also exposed, which is not beautiful.

[0004] For example, the patent document with publication number CN107567260A discloses an integrated motor, including a motor, a controller and a controller cooling device, the controller includes a heat source, the controller cooling device includes a radiator, the radiator includes a base and heat dissipation fins, an air channel is formed between the heat dissipation fins, the controller cooling device also includes a fan arranged on one side of the radiator to force air to circulate in the air channel and a plurality of fulcrums at predetermined heights arranged between the controller and the motor, and a heat insulation gap is formed between the controller and the motor. The technical solution disclosed in the patent document also cannot solve the technical problems described above. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a motor back cover, the purpose of which is to improve the compactness of the motor structure.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: the motor back cover includes a first surface and a second surface for installing a drive circuit substrate, a first chamber for accommodating a motor stator is arranged on the first surface, and a second chamber for accommodating electronic components on the drive circuit substrate is arranged on the second surface.

[0007] The electronic components include a drive circuit PCB board and an electrolytic capacitor, and a relief hole for accommodating the electrolytic capacitor is arranged in the second chamber.

[0008] Two avoidance holes are provided, and the avoidance holes are communicated with the first chamber.

[0009] A wire hole is provided in the second chamber, and the wire hole is communicated with the first chamber.

[0010] A wire clamping groove is arranged on the rear cover of the motor.

[0011] The driving circuit substrate is an aluminum substrate.

[0012] The drive circuit substrate is connected to the motor rear cover through bolts. The motor rear cover is provided with screw holes, and the drive circuit substrate is provided with mounting holes for the bolts to pass through.

[0013] The utility model also provides a drive-integrated motor, comprising the motor rear cover.

[0014] The motor back cover of the utility model can integrate the motor drive circuit, improve the compactness of the motor structure, reduce the size of the motor, save space when arranging the motor, and the motor is dustproof and waterproof, and has a more beautiful appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] This specification includes the following drawings, which show the following contents:

[0016] Figure 1 It is a structural schematic diagram of the rear cover of the motor of the utility model;

[0017] Figure 2 It is another structural schematic diagram of the rear cover of the motor of the utility model;

[0018] Figure 3 It is a schematic diagram of the coordination between the motor rear cover and the motor drive circuit of the utility model;

[0019] Figure 4 This is another schematic diagram of the coordination between the motor rear cover and the motor drive circuit of the utility model;

[0020] The markings in the figure are:

[0021] 1. First chamber; 2. Second chamber; 3. Motor center axis hole; 4. Motor rotor bearing fixing position; 5. First wire hole; 6. Second wire hole; 7. First avoidance hole; 8. Second avoidance hole; 9. Second surface; 10. Wire clamping groove; 11. Drive circuit substrate; 12. Drive circuit PCB board; 13. First electrolytic capacitor; 14. Second electrolytic capacitor; 15. Magnetic encoder sensing position; 16. Mounting hole; 17. Screw hole. DETAILED DESCRIPTION

[0022] The specific implementation methods of the utility model are further explained in detail below with reference to the accompanying drawings through the description of embodiments, with the aim of helping technicians in the field to have a more complete, accurate and in-depth understanding of the concept and technical solution of the utility model and facilitating its implementation.

[0023] It should be noted that, in the following embodiments, the “first” and “second” mentioned do not represent an absolute distinction in structure and / or function, nor do they represent a sequential order of execution, but are merely for the convenience of description.

[0024] like Figures 1 to 4 As shown, the utility model provides a motor back cover, including a first surface and a second surface 9 for mounting a drive circuit substrate 11, a first chamber 1 for accommodating a motor stator is arranged on the first surface, and a second chamber 2 for accommodating electronic components on the drive circuit substrate 11 is arranged on the second surface 9.

[0025] Specifically, if Figures 1 to 4 As shown, the first surface and the second surface 9 are the end surfaces at opposite ends of the motor back cover in the axial direction, the first surface and the second surface 9 are parallel, and the second surface 9 is a fitting surface that fits with the surface of the drive circuit substrate 11. The electronic components include a drive circuit PCB board 12 and an electrolytic capacitor. A magnetic encoder chip is arranged on the drive circuit PCB board 12, and a avoidance hole for accommodating the electrolytic capacitor is arranged in the second compartment 2. The second compartment 2 is arranged at the bottom of the motor back cover, and the second compartment 2 only occupies about two-thirds of the area at the bottom of the motor back cover. The second compartment 2 is used to place the stepper motor drive circuit, and the drive circuit substrate 11 is both a drive circuit and a cover plate for closing the second compartment 2.

[0026] like Figures 1 to 4 As shown, two electrolytic capacitors are provided, namely, a first electrolytic capacitor 13 and a second electrolytic capacitor 14. Accordingly, two avoidance holes are provided, and the avoidance holes are connected to the first chamber 1. The two avoidance holes are respectively a first avoidance hole 7 and a second avoidance hole 8. The first electrolytic capacitor 13 passes through the first avoidance hole 7, and the second electrolytic capacitor 14 passes through the second avoidance hole 8. The electrolytic capacitor of the motor drive circuit is much higher than other components, and the two avoidance holes are provided to make full use of the space.

[0027] like Figures 1 to 4 As shown, a wire clamping groove 10 is provided on the rear cover of the motor, and is used together with a drive circuit substrate 11 to fix the motor cable.

[0028] like Figures 1 to 4As shown, a wire hole is provided in the second chamber 2, and the wire hole is connected to the first chamber 1. Two wire holes are provided, namely a first wire hole 5 and a second wire hole 6, and the first wire hole 5 and the second wire hole 6 are used to allow the wires connecting the motor stator coil and the drive circuit PCB board 12 to pass through.

[0029] like Figures 1 to 4 As shown, a motor center axis hole 3 is provided on the motor back cover, and the motor center axis hole 3 is used for the motor rotor to pass through. A magnetic encoder chip is provided on the driving circuit PCB board 12, and the position of the magnetic encoder chip is opposite to the motor center axis hole 3. The motor rotor with an induction magnet cooperates with the magnetic encoder chip to realize the encoder function.

[0030] Preferably, the driving circuit substrate 11 is made of an aluminum substrate, so as to have a better heat dissipation effect. In addition, the driving circuit substrate 11 may also be made of other commonly used materials.

[0031] like Figures 1 to 4 As shown, the drive circuit substrate 11 is connected to the motor rear cover by multiple bolts. The motor rear cover is provided with screw holes 17. All screw holes 17 are distributed around the outer side of the second chamber 2. The drive circuit substrate 11 is provided with mounting holes 16 for the bolts to pass through.

[0032] The utility model also provides a drive-integrated motor, comprising a motor back cover of the above structure.

[0033] The drive integrated motor also includes a housing and a motor stator and a motor rotor installed in the housing, and a motor rear cover is installed at the rear end of the housing. The first chamber 1 is buckled at the bottom of the motor stator and fixes the motor rotor.

[0034] The first surface of the motor back cover is fitted with the end surface of the shell, the motor back cover is fixedly connected to the shell, the drive circuit substrate 11 is completely fitted with the second surface 9 of the motor back cover, and the motor drive circuit is integrated on the motor back cover to improve the compactness of the motor structure, reduce the size of the motor, and save space when arranging the motor. Moreover, after assembly, it is not easy to have a gap between the motor back cover and the shell and the drive circuit substrate 11, and the appearance of the motor is also more beautiful.

[0035] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model; or the above concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. Motor rear cover, characterized by: It comprises a first surface and a second surface for mounting a driving circuit substrate. The first surface is provided with a first chamber for accommodating a motor stator, and the second surface is provided with a second chamber for accommodating electronic components on the driving circuit substrate.

2. The motor rear cover according to claim 1, characterized in that: The electronic components include a drive circuit PCB board and an electrolytic capacitor, and a relief hole for accommodating the electrolytic capacitor is arranged in the second chamber.

3. The motor rear cover according to claim 2, characterized in that: Two avoidance holes are provided, and the avoidance holes are communicated with the first chamber.

4. The motor rear cover according to any one of claims 1 to 3, characterized in that: A wire hole is provided in the second chamber, and the wire hole is communicated with the first chamber.

5. The motor rear cover according to any one of claims 1 to 3, characterized in that: A wire clamping groove is arranged on the rear cover of the motor.

6. The motor rear cover according to any one of claims 1 to 3, characterized in that: The driving circuit substrate is an aluminum substrate.

7. The motor rear cover according to any one of claims 1 to 3, characterized in that: The drive circuit substrate is connected to the motor rear cover through bolts. The motor rear cover is provided with screw holes, and the drive circuit substrate is provided with mounting holes for the bolts to pass through.

8. Drive integrated motor, characterized by: It comprises the motor rear cover as described in any one of claims 1 to 7.

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