External brake rectifier fixing structure for motor

Abstract

The utility model relates to a motor with a brake, in particular to an external brake rectifier fixing structure for a motor. An external brake rectifier fixing structure for a motor comprises a box body used for containing rectifier electric parts, one end, extending out of a machine shell, of a rotating shaft of the motor is provided with a brake in a matched mode, the brake side of the machine shell is provided with a brake cover cap, and the end portion of the brake cover cap and the end portion of the machine shell are sleeved with each other and fixed through at least three fastening screws. Three fastening screws are arranged in the box body, one of the three fastening screws penetrates through the box body and the circuit board at the same time, the side wall, making contact with the machine shell or the brake cover shell, of the box body is provided with a positioning part extending in the side direction, and when the box body is fixed to the machine shell and the brake cover, the positioning part makes contact with the end face of the brake cover or the axial end face of the machine shell. The utility model has the advantages that the fixing stability of the rectifier box body can be ensured, and the assembly is convenient.

Description

Technical Field

[0001] The utility model relates to a motor with a brake, in particular to a fixing structure of an external brake rectifier for the motor. Background Art

[0002] Some motors are equipped with brakes. To ensure stability during braking, a brake rectifier is used to convert AC power into DC power.

[0003] A Chinese patent with publication number CN205356174U discloses a generator rectifier, including a generator and a rectifier, wherein the rectifier includes a rectifier box body, and the rectifier box body is connected to the casing of the generator by bolts. In order to ensure stability during use and prevent the rectifier from shaking, the rectifier box body in the above scheme is fixed to the motor casing of the generator by multiple bolts. The assembly of multiple bolts will increase the assembly process, and multiple threaded holes need to be processed on the casing; generally, at least three internal threaded holes for fixing the rectifier box body will be processed on the casing, and drilling holes at the deviated end of the casing will increase the sealing area, and the bolts may contact the parts in the casing. Utility Model Content

[0004] The utility model aims to provide a fixing structure for an external brake rectifier for a motor which can ensure the fixing stability of a rectifier box body and is easy to assemble.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a fixing structure of an external brake rectifier for a motor, comprising a box body for accommodating rectifier electrical components, one end of the motor's rotating shaft extending outside the casing is equipped with a brake, and a brake cover is provided on the brake side of the casing, the end of the brake cover and the end of the casing are mutually nested and fixed by at least three fastening screws, one of the three fastening screws passes through the box body and the circuit board at the same time, and the side wall of the box body in contact with the casing or the brake cover casing has a laterally extending positioning portion, and when the box body is fixed to the casing and the brake cover, the positioning portion contacts the end face of the brake cover or the axial end face of the casing.

[0006] After completing the assembly of the brake and the motor, install the brake cover and the motor casing. First, assemble at least two fixing screws to fix the brake cover and the motor casing. Then align the fixing holes of the box body with the threaded holes of the brake cover and the motor casing that have not yet been installed with the fixing screws. Stick the box body on the circumferential outer wall of the motor casing and the brake cover so that the positioning part of the box body contacts the step surface of the step structure formed by the motor casing and the brake cover. Then install the last fixing screw to achieve the installation and fixation of the box body, the brake cover and the motor casing.

[0007] The solution of the utility model can fix the box body with only one fixing screw, and it is not necessary to process more holes on the motor housing or the brake cover, with fewer assembly processes and lower costs. The utility model sets a positioning part and makes the motor housing and the brake cover have different outer diameters, so that the end face of the positioning part along the axial direction of the shaft can contact the end face of the brake cover or the axial end face of the housing, thereby further improving the fixing stability. The rectifier box body of the utility model is fixed at the end of the motor, and there is no situation where bolts extend into the housing to contact the stator, and no extra holes are added, no more sealing is required, and no increase in possible sealing points will be caused.

[0008] Preferably, the side wall of the box body is an arc surface, and the outer edges of the cross-sections of the circumferential outer wall of the housing and the circumferential outer wall of the brake cover are circular. The box body, the housing and the brake cover all have an arc surface, which can increase the contact area compared to a square structure, making the fixing stability of the box body higher, and can also prevent the box body from rotating, so as to ensure the fixing stability of the box body when only one fixing screw is used.

[0009] Preferably, the box body comprises a first part and a second part, the first part and the second part are assembled to form a receiving cavity for accommodating the rectifier electrical device, and the first part is fixed to the second part by snaps. The box body itself is fixed together by snaps, not by small screws, which can further improve assembly efficiency.

[0010] Preferably, the first part has the positioning part, the first part is provided with a notch for fixing the wire sheath near the second part, the second part has an extension block extending into the notch and used to contact the circumferential outer wall of the wire sheath, and both ends of the wire sheath have wire sheath limiting parts located inside and outside the extension block and the side wall of the first part with the notch, and the width of the wire sheath limiting part is greater than the width of the notch. The wire sheath is not only used to protect the wire harness connected to the circuit board, but also used to limit the second part to prevent the second part from shaking along the axial direction of the wire sheath.

[0011] Preferably, a protrusion is provided on the inner wall of the box body, and a fastening screw passes through the protrusion to fix the box body, the housing and the brake cover. The protrusion is provided with a receiving groove for receiving the head of the fastening screw, and the depth of the receiving groove is greater than the length of the head of the fastening screw. The box body can be made of plastic, and the protrusion is used to increase the safety distance between the fastening screw made of metal material and the rectifier circuit components, so that the use of the rectifier is safer and more reliable.

[0012] The utility model has the advantages of ensuring the fixing stability of the rectifier box body and being easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1It is a structural schematic diagram of the utility model.

[0014] Figure 2 It is a structural schematic diagram of the first part of the box body of the utility model.

[0015] Figure 3 It is a structural schematic diagram of the second part of the box body of the utility model. DETAILED DESCRIPTION

[0016] The utility model is further described below based on the accompanying drawings and specific embodiments.

[0017] Depend on Figures 1 to 3 As shown, this embodiment discloses an external brake rectifier fixing structure for a motor, including a box body for accommodating rectifier electrical components, the box body is arranged on the outside of the motor, the box body includes a boxed first part 1 and a cover-shaped second part 2, the first part 1 and the second part 2 are assembled to form a accommodating cavity for accommodating rectifier electrical components.

[0018] In this embodiment, the part of the first part 1 close to the housing 3 of the motor is the bottom 11, and the side part 12 is surrounded by the bottom 11. The first part 1 is fixed with the second part 2 by snapping. A snap groove 121 is respectively provided on the side parts 12 on opposite sides of the first part 1, and a snap hook 21 is provided on opposite sides of the second part 2. A notch 122 for fixing the grommet 4 is provided on the side part 12 close to the second part 2. The grommet 4 includes a middle section and grommet limiting parts 41 located on both sides of the middle section. The width of the grommet limiting parts 41 is greater than the width of the notch 122. The second part 2 has an extension block 22 extending into the notch 122 and used to contact the circumferential outer wall of the middle section of the grommet 4. When the first part 1, the second part 2 and the grommet 4 are assembled and fixed, the two grommet limiting parts 41 are respectively located on the inner and outer sides of the extension block 22, and the extension block 22 is respectively located on the inner and outer sides of the side part 12.

[0019] The end of the motor shaft 31 extending out of the housing 3 in this embodiment is equipped with a brake 5, and a brake cover 6 is provided on the brake side of the housing. The end of the brake cover 6 and the end of the housing 3 are provided with a stopper structure that matches each other. The end of the brake cover 6 has a female stopper, and the end of the housing 3 has a male stopper, and the outer diameter of the end of the brake cover 6 is greater than the maximum outer diameter of the housing 3. The stopper matching parts of the brake cover 6 and the housing 3 are mutually sleeved and fixed together by four fastening screws 7, one of which passes through the box body to achieve the fixation of the box body with the housing 3 and the brake cover 6. Among them, the bottom 11 of the first part 1 of the box body has a laterally extending positioning part 111. When the box body is fixed with the housing 3 and the brake cover 6, the positioning part 111 contacts the end face of the brake cover 6 and the circumferential outer wall of the housing 3. The bottom 11 of this embodiment is arc-shaped, and the outer edges of the cross-sections of the circumferential outer wall of the housing 3 and the circumferential outer wall of the brake cover 6 are circular.

[0020] Depend on Figure 1 As shown, a protrusion 112 is provided on the inner wall of the bottom 11 of the box body, and the fastening screw 7 passes through the protrusion to fix the box body, the housing 3 and the brake cover 6. The protrusion 112 is provided with a receiving groove for receiving the head of the fastening screw 7, and the depth of the receiving groove is greater than the length of the head of the fastening screw. Figure 2 As shown, a through hole 113 is provided at a corner of the bottom 11 and penetrates inside and outside for the brake harness to pass through.

Claims

1. A motor external brake rectifier fixing structure, comprising a box body for accommodating rectifier electrical components, one end of the motor shaft extending out of the housing is equipped with a brake, and a brake cover is provided on the brake side of the housing, characterized in that: The end of the brake cover and the end of the casing are mounted on each other and fixed by at least three fastening screws, one of the three fastening screws passes through the box body, and the side wall of the box body in contact with the casing or the brake cover casing has a laterally extending positioning portion, and when the box body is fixed to the casing and the brake cover, the positioning portion contacts the end face of the brake cover or the axial end face of the casing.

2. The external brake rectifier fixing structure for a motor according to claim 1, characterized in that: The side wall of the box body is an arc surface, and the outer edges of the cross-sections of the circumferential outer wall of the housing and the circumferential outer wall of the brake cover shell are circular.

3. The external brake rectifier fixing structure for a motor according to claim 1, characterized in that: The box body comprises a first part and a second part, wherein the first part and the second part are assembled to form a receiving cavity for receiving the rectifier electrical component, and the first part is fixed with a buckle.

4. The external brake rectifier fixing structure for a motor according to claim 3, characterized in that: The first part has the positioning part, the first part is provided with a notch for fixing the wire sleeve near the second part, the second part has an extension block extending into the notch and used to contact the circumferential outer wall of the wire sleeve, and both ends of the wire sleeve have wire sleeve limiting parts located inside and outside the extension block and the side wall of the first part with the notch, and the width of the wire sleeve limiting part is greater than the width of the notch.

5. The external brake rectifier fixing structure for a motor according to claim 1, characterized in that: A protrusion is provided on the inner wall of the box body, and a fastening screw passes through the protrusion to fix the box body, the casing and the brake cover. The protrusion is provided with a receiving groove for accommodating the head of the fastening screw, and the depth of the receiving groove is greater than the length of the head of the fastening screw.

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