Motor with brake

Abstract

A motor with a brake contributes to reducing the size of a cover covering a wire lead-out portion, reducing material cost, and improving waterproof performance and dustproof performance. The motor with the brake comprises a motor shell, a brake shell, a power source wire and a brake wire, the motor shell and the brake shell are assembled in the axial direction, and the power source wire is electrically connected with the brake wire. The power source electric wire penetrates through the motor shell in the radial direction and then is bent towards the brake shell side, and the power source electric wire extends to the axial end face of the brake shell towards the side opposite to the motor shell in the brake shell. The brake wire extends in the brake housing toward a side opposite to the motor housing, and is electrically connected to the power source wire at the axial end face to form an electrical connection portion.

Description

Technical Field

[0001] This utility model relates to a motor with a brake. Background Technology

[0002] Previously, there was a type of motor with a brake, which included a motor housing, a brake housing, a power source wire, a motor wire (or terminal), and a brake wire. The motor housing and the brake housing were assembled axially. The power source wire was electrically connected to the motor wire (or terminal) and the brake wire, respectively. That is, the power source wire included a wire harness electrically connected to the motor wire (or terminal) and a wire harness electrically connected to the brake.

[0003] In the aforementioned motor with a brake, in order to make electrical connections between the power source wire and the motor wire (or terminal) and the brake wire, through holes are usually provided in the through holes of the peripheral wall of the motor housing and the peripheral wall of the brake housing, respectively, for the motor wire (or terminal) and the brake wire to be led out. In addition, in order to be waterproof and dustproof, a cover is required to cover the lead-out parts of the motor wire (or terminal) and the brake wire. However, in this case, a large cover needs to be formed, which makes it difficult to control material costs. Utility Model Content

[0004] This utility model was made in view of the above-mentioned problems, and its purpose is to provide a motor with a brake, which helps to reduce the size of the cover covering the wire lead-out part, reduce material costs, and improve waterproof and dustproof performance.

[0005] To achieve the above objectives, this utility model provides a motor with a brake, including a motor housing, a brake housing, a power source wire, and a brake wire. The motor housing and the brake housing are assembled axially. The power source wire is electrically connected to the brake wire. The power source wire passes through the motor housing radially and then bends toward the brake housing. It extends within the brake housing toward the side opposite to the motor housing to the axial end face of the brake housing. The brake wire extends within the brake housing toward the side opposite to the motor housing and is electrically connected to the power source wire at the axial end face to form an electrical connection portion.

[0006] According to the present invention, in a motor with a brake, the power source wire passes radially through the motor housing and bends toward the brake housing. It then extends inside the brake housing toward the opposite side of the motor housing to the axial end face of the brake housing. The brake wire extends inside the brake housing toward the opposite side of the motor housing and is electrically connected to the power source wire at the axial end face to form an electrical connection portion. Therefore, compared to the case where wires (or terminals) are led out from a through hole in the peripheral wall of the motor housing and from a through hole in the peripheral wall of the brake housing, and a cover is provided to cover both leads, the size of the cover can be reduced, lowering material costs. Furthermore, there is no need to provide a through hole in the peripheral wall of the brake housing for the brake wire to lead out; therefore, water and dust can be prevented from entering the interior of the brake housing through the through hole, improving waterproof and dustproof performance.

[0007] Furthermore, in the motor with brake of this utility model, it is preferable that the brake housing has an end wall located on the opposite side of the motor housing, the end wall is provided with a through hole, and the electrical connection part is located in the through hole.

[0008] According to the present invention, the motor with a brake has an end wall located on the opposite side of the motor housing, and the end wall is provided with a through hole. The electrical connection part is located in the through hole. Therefore, the through hole can be used to limit and guide the power source wire and the brake wire, and facilitate the electrical connection of the power source wire and the brake wire by soldering or the like.

[0009] Furthermore, in the motor with brake of this invention, it is preferable that an insulating bushing surrounding the electrical connection portion is fitted into the through hole.

[0010] According to the present invention, the motor with brake has an insulating bushing that surrounds the electrical connection part embedded in the through hole. Therefore, it can protect the electrical connection part and prevent the electrical connection part and the wires nearby from being damaged by compression or the resin rubber from breaking due to compression, which could lead to short circuits. It can also play a certain role in fixing.

[0011] Furthermore, in the motor with brake of this invention, the insulating bushing preferably has: a cylindrical portion whose outer peripheral surface is in close contact with the inner peripheral surface of the through hole; and a covering portion that covers the electrical connection portion from the side opposite to the motor housing.

[0012] According to the present invention, a motor with a brake has an insulating bushing comprising: a cylindrical portion whose outer peripheral surface is in close contact with the inner peripheral surface of a through hole; and a cover portion that covers the electrical connection portion from the side opposite to the motor housing. Therefore, the electrical connection portion and the nearby wires are prevented from being damaged by compression from the side opposite to the motor housing, thereby better protecting the electrical connection portion.

[0013] Furthermore, in the motor with brake of this invention, it is preferable that the cover can be switched between a first position and a second position. In the first position, the cover overlaps with the electrical connection in the axial direction, and in the second position, the cover does not overlap with the electrical connection in the axial direction.

[0014] According to the present invention, the cover of the motor with brake can be switched between a first position and a second position. In the first position, the cover overlaps with the electrical connection in the axial direction, and in the second position, the cover does not overlap with the electrical connection in the axial direction. Therefore, when the bushing is inserted into the through hole, by switching the cover to the second position, the positional relationship between the cylinder and the electrical connection can be easily observed, and misalignment of the cylinder relative to the electrical connection can be avoided.

[0015] Furthermore, in the motor with brake of this invention, the insulating bushing preferably also has a connecting piece, which is disposed at a portion of the circumferential direction of the cylindrical portion, and the cover portion is flexibly connected to the cylindrical portion via the connecting piece.

[0016] Furthermore, in the motor with brake of this invention, it is preferable to also include an encoder housing, which is axially assembled on the side of the brake housing opposite to the motor housing and covers the electrical connection portion.

[0017] Furthermore, in the motor with brake of this invention, preferably the power source wire and the brake wire extend within the brake housing close to the inner wall surface of the brake housing.

[0018] According to the present invention, in the motor with brake, the power source wire and the brake wire extend close to the inner wall of the brake housing, thus suppressing the influence of the power source wire and the brake wire on the arrangement of the internal components of the brake.

[0019] Furthermore, in the motor with brake of this invention, it is preferable to provide an insulating tube on the electrical connection portion.

[0020] According to the present invention, an insulating tube is sleeved on the electrical connection part of the motor with a brake. Therefore, the insulating tube and the insulating bushing can form a double cover, thereby better protecting the electrical connection part.

[0021] Furthermore, in the motor with brake of this utility model, a stator and a rotor are preferably provided inside the motor housing. The peripheral wall of the motor housing is provided with a through hole for the power source wire to pass through in the radial direction. A cover is fixed on the motor housing, which covers the wire lead-out portion of the power source wire led out from the motor housing through the through hole. A brake coil is provided inside the brake housing, and the brake wire is led out from the brake coil toward the side opposite to the motor housing.

[0022] (Utility Model Effect)

[0023] According to this utility model, the power source wire passes through the motor housing radially and then bends towards the brake housing. It extends inside the brake housing towards the opposite side of the motor housing to the axial end face of the brake housing. The brake wire extends inside the brake housing towards the opposite side of the motor housing and is electrically connected to the power source wire at the axial end face to form an electrical connection portion. Therefore, compared to the case where wires (or terminals) are led out from the through hole in the peripheral wall of the motor housing and from the through hole in the peripheral wall of the brake housing, and a cover is provided to cover both leads, the size of the cover can be reduced, lowering material costs. Furthermore, there is no need to provide a through hole in the peripheral wall of the brake housing for the brake wire to lead out; therefore, water and dust can be prevented from entering the interior of the brake housing through the through hole, improving waterproof and dustproof performance. Attached Figure Description

[0024] Figure 1 This is a perspective view schematically illustrating a motor with a brake according to an embodiment of the present invention.

[0025] Figure 2 This is a schematic half-sectional side view of a motor with a brake according to an embodiment of the present invention, wherein the encoder housing and its internal components are omitted.

[0026] Figure 3 This indicates viewing from one side along the axis. Figure 2 A diagram of a motor with a brake, wherein the cover of the insulating bushing is in the first position.

[0027] Figure 4 This indicates viewing from one side along the axis. Figure 2 The diagram shows a motor with a brake, where the cover of the insulating bushing is in the second position.

[0028] Figure 5 This is a perspective view of the brake housing of a motor with a brake according to an embodiment of the present invention.

[0029] Figure 6 This is a partial perspective view of the brake housing of a motor with a brake according to an embodiment of the present invention.

[0030] Figure 7 This is a perspective view schematically illustrating the insulating bushing of a motor with a brake according to an embodiment of the present invention.

[0031] (Symbol Explanation)

[0032] 1. Motor with brake

[0033] 11 Motor housing

[0034] 111 Motor housing peripheral wall

[0035] 112 Motor housing end wall

[0036] 1121 Motor housing recess

[0037] 12 stators

[0038] 121 Stator Core

[0039] 13 Rotors

[0040] 131 pivot

[0041] 132 Magnets

[0042] 19 masks

[0043] 21 Brake housing

[0044] 211 Brake housing peripheral wall

[0045] 212 Brake housing end wall

[0046] 2121 Brake housing recess

[0047] 213 Cover plate

[0048] 22 Solenoid

[0049] 23 Insulating bushing

[0050] 231 Cylinder section

[0051] 232 Coverage Section

[0052] 233 Connecting piece

[0053] 24 Insulating tubes

[0054] 31 Encoder Housing

[0055] 71 Power Source Wire

[0056] 81 Brake wire

[0057] CP electrical connection part

[0058] TH through hole

[0059] BR1 First Bearing

[0060] BR2 Second Bearing Detailed Implementation

[0061] Below, in conjunction with Figures 1 to 7 The motor with a brake according to the embodiments of this utility model will be described.

[0062] For ease of explanation, the direction of extension of the rotor's rotation center line L is simply referred to as the axial direction, and the circumferential and radial directions centered on the rotor's rotation center line are simply referred to as the circumferential and radial directions, respectively. Furthermore, one side of the axial direction is designated as L1, and the other side of the axial direction is designated as L2.

[0063] (Overall structure of a motor with a brake)

[0064] like Figure 1 and Figure 2 As shown, the motor 1 with a brake includes a motor housing 11, a brake housing 21, a power source wire 71, and a brake wire 81. The motor housing 11 and the brake housing 21 are assembled axially. The power source wire 71 passes through the motor housing 11 radially and bends toward the brake housing 21. It extends inside the brake housing 21 toward the side opposite to the motor housing 11 to the axial end face of the brake housing 21. The brake wire 81 extends inside the brake housing 21 toward the side opposite to the motor housing 11 and is electrically connected to the power source wire 70 at the aforementioned axial end face (for example, by soldering the brake wire 81 to the power source wire 70) to form an electrical connection portion CP.

[0065] Here, as Figure 1 and Figure 2 As shown, a cover 19 is provided at the radially penetrating portion of the power source wire 71 in the motor housing 11. The cover 19 covers the wire lead-out portion of the power source wire 71 extending from the motor housing 11.

[0066] In addition, such as Figure 1 As shown, the motor 1 with brake also includes an encoder housing 31, which is axially mounted on the side of the brake housing 21 opposite to the motor housing 11 and covers the electrical connection portion CP. An encoder is disposed inside the encoder housing 31.

[0067] (Motor housing and its internal structure)

[0068] like Figure 2 As shown, a stator 12 and a rotor 13 are disposed inside the motor housing 11.

[0069] Here, as Figure 1 and Figure 2As shown, the motor housing 11 is generally rectangular in shape. The motor housing 11 has a peripheral wall 111. The peripheral wall 111 is cylindrical, extending axially, and has a through hole for the power source wire 71 to pass through radially. The motor housing 11 also has an end wall 112. The end wall 112 is located at the end of one side L1 of the peripheral wall 111 in the axial direction and extends in a plane perpendicular to the axial direction.

[0070] In addition, such as Figure 2 As shown, the stator 12 has a stator core 121 and a coil. The stator core 121 is annular, and its outer circumferential surface is in close contact with, for example, the inner surface of the motor housing peripheral wall 111. The coil is wound around the stator core 121 through an insulator. The rotor 13 is radially spaced from the stator 12. The rotor 13 has a shaft 131 and a magnet 132. The shaft 131 extends axially, with one axial end L1 protruding through the motor housing end wall 112 and extending to the outside of the motor housing 11, and the other axial end L2 protruding through the brake housing end wall 212 of the brake housing 21 and extending into the encoder housing 31. The magnet 132 is fixed to the outer circumference of the shaft 131.

[0071] In addition, the coils of stator 12 are electrically connected to power source wires 71, for example, via connecting wires (or terminals).

[0072] In addition, such as Figure 2 As shown, a first bearing BR1 is provided inside the motor housing 11 to support one axial side L1 of the rotor 13's shaft 131. Specifically, a motor housing recess 1121 is provided on the motor housing end wall 112, recessed from the other axial side L1 toward the axial side. The first bearing BR1 has an inner ring and an outer ring, the inner ring being fixed to the shaft 131, and the outer ring being embedded in the motor housing recess 1121.

[0073] (Brake housing and its internal structure)

[0074] like Figure 2 As shown, a solenoid 22 is provided inside the brake housing 21. The solenoid 22 has a brake core and a brake coil disposed on the brake core. A brake wire 81 is led out from the brake coil toward the side opposite to the motor housing 11.

[0075] Here, as Figure 1 and Figure 2 As shown, the brake housing 21 has an overall rectangular parallelepiped shape. The brake housing 21 has a peripheral wall 211. The peripheral wall 211 is cylindrical, extending axially. The brake housing 21 also has an end wall 212. The end wall 212 is located at the end of the peripheral wall 211 on the opposite side L2 in the axial direction and extends in a plane perpendicular to the axial direction.

[0076] In addition, such as Figures 2 to 7 As shown, the brake housing 21 has a through hole TH on its brake housing end wall 212, and the electrical connection portion CP is located within the through hole TH. Specifically, an insulating bushing 23 surrounding the electrical connection portion CP is fitted within the through hole TH. The insulating bushing 23 is made of, for example, an elastic material and has: a cylindrical portion 231, the outer peripheral surface of which is in close contact with the inner peripheral surface of the through hole TH; and a cover portion 232, which covers the electrical connection portion CP from the side opposite to the motor housing 11. The cover portion 232 can be in a first position (refer to...) Figure 3 ) and the second position (refer to) Figure 4 The cover 232 can be switched between two positions. In the first position, the cover 232 overlaps with the electrical connection CP in the axial direction. In the second position, the cover 232 does not overlap with the electrical connection CP in the axial direction. The insulating bushing 23 also has a connecting piece 233, which is disposed on a portion of the circumferential direction of the cylindrical portion 231. The cover 232 is flexibly connected to the cylindrical portion 231 via the connecting piece 233.

[0077] In addition, such as Figure 4 As shown, an insulating tube 24 is fitted onto the electrical connection part CP.

[0078] In addition, such as Figure 2 As shown, the power source wire 71 and the brake wire 81 extend close to the inner wall of the brake housing 21 inside the brake housing 21.

[0079] Furthermore, the outer peripheral surface of the brake core of the solenoid 22 is in close contact with, for example, the inner surface of the brake housing peripheral wall 211. A through hole is provided on the outer peripheral side of the solenoid 22, which runs axially through the solenoid and allows the power source wire 71 and the brake wire 81 to pass through.

[0080] Furthermore, a brake plate, a friction plate, an armature, and a coil spring are also provided inside the brake housing 21. The friction plate rotates integrally with the shaft 131. The coil spring applies force to the armature on the axially upward side L1, thereby clamping the friction plate between the brake plate and the armature, thus applying a braking force to the rotor 13. On the other hand, when the solenoid 22 is energized, the armature resists the coil spring and is attracted by the solenoid 22, thereby creating a gap between the armature and the friction plate, freeing the friction plate and allowing the shaft of the rotor 13 to rotate freely.

[0081] In addition, such as Figure 2As shown, a second bearing BR2 is provided inside the brake housing 21, supporting the rotor 13's shaft on the other axial side L2. Specifically, a brake housing recess 2121 is provided on the brake housing end wall 212, recessed from the other axial side L1 toward one axial side. The second bearing BR2 has an inner ring and an outer ring; the inner ring is fixed to the shaft 131, and the outer ring is embedded in the brake housing recess 2121. A cover plate 213 is fixed to the brake housing end wall 212 in such a way as to cover the opening of the brake housing recess 2121. The bottom surface of the brake housing recess 2121 and the cover plate 213 clamp the second bearing BR2 from both axial sides. The cover plate 213 has a plurality of protrusions that project radially outward, and the cover plate 213 is fixed to the brake housing end wall 212, for example, by means of screws screwed into holes provided in the protrusions.

[0082] (Main effects of this implementation method)

[0083] According to the motor 1 with brake in this embodiment, the power source wire 70 passes through the motor housing 11 radially and bends toward the brake housing 21. It extends inside the brake housing 21 toward the side opposite to the motor housing 11 to the axial end face of the brake housing 21. The brake wire 81 extends inside the brake housing 21 toward the side opposite to the motor housing 11 and is electrically connected to the power source wire 70 at the axial end face to form an electrical connection portion CP. Therefore, compared with the case where the wire (or terminal) is led out from the through hole in the peripheral wall of the motor housing 11 and the wire is led out from the through hole in the peripheral wall of the brake housing 21 and a cover covering both leads is provided, the size of the cover can be reduced and the material cost can be reduced. Furthermore, it is not necessary to provide a through hole for the brake wire 81 to be led out on the peripheral wall of the brake housing 21. Therefore, water and dust can be prevented from entering the interior of the brake housing through the through hole, thus improving the waterproof and dustproof performance.

[0084] Furthermore, according to this embodiment, the motor 1 with a brake has an insulating bushing 23 fitted inside the through hole TH, surrounding the electrical connection portion CP. Therefore, it can protect the electrical connection portion CP, preventing damage to the electrical connection portion CP and nearby wires due to compression, or breakage of the resin insulation due to compression, leading to short circuits, and also provides a certain degree of fixation. Specifically, the insulating bushing 23 has: a cylindrical portion 231, the outer peripheral surface of which is in close contact with the inner peripheral surface of the through hole TH; and a covering portion 232, which covers the electrical connection portion CP from the side opposite to the motor housing 11. Therefore, it can suppress damage to the electrical connection portion CP and nearby wires due to compression from the side opposite to the motor housing 11, thereby better protecting the electrical connection portion CP.

[0085] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above embodiments.

[0086] For example, in the above embodiment, an insulating tube 24 is sleeved on the electrical connection part CP, but it is not limited to this and the insulating tube 24 may be omitted.

[0087] Furthermore, in the above embodiments, the insulating bushing 23 is not limited to the shape shown in the figure. For example, the cover portion 232 may be connected to the entire circumference of the cylindrical portion 231, or the cover portion 232 and the connecting piece 233 may be omitted.

[0088] It should be understood that within the scope of this utility model, the various parts in the embodiments can be freely combined, or the various parts in the embodiments can be appropriately modified or omitted.

Claims

1. A motor with a brake, comprising a motor housing, a brake housing, a power source wire, and a brake wire, the motor housing and the brake housing being assembled in an axial direction, the power source wire being electrically connected to the brake wire, characterized in that the power source wire is bent toward the brake housing side after penetrating the motor housing in a radial direction, and extends in the brake housing toward a side opposite to the motor housing to an axial end surface of the brake housing, the brake wire extends in the brake housing toward a side opposite to the motor housing, and is electrically connected to the power source wire at the axial end surface to form an electrical connection portion.

2. The motor with a brake according to claim 1, characterized in that the brake housing has an end wall on a side opposite to the motor housing, the end wall is provided with a through hole, and the electrical connection portion is located in the through hole.

3. The motor with a brake according to claim 2, characterized in that an insulating bushing that surrounds the electrical connection portion is fitted in the through hole.

4. The motor with a brake according to claim 3, characterized in that the insulating bushing has a cylindrical portion whose outer peripheral surface is in close contact with an inner peripheral surface of the through hole, and a cover portion that covers the electrical connection portion from a side opposite to the motor housing.

5. The motor with a brake according to claim 4, characterized in that the cover portion is switchable between a first position and a second position, in the first position, the cover portion overlaps the electrical connection portion in an axial direction, and in the second position, the cover portion does not overlap the electrical connection portion in the axial direction.

6. The motor with a brake according to claim 5, characterized in that the insulating bushing further has a connecting piece, the connecting piece is provided at a part of a circumferential direction of the cylindrical portion, and the cover portion is flexibly connected to the cylindrical portion via the connecting piece.

7. The motor with a brake according to claim 4, characterized in that an encoder housing is further included, the encoder housing is assembled in an axial direction on a side of the brake housing opposite to the motor housing, and covers the electrical connection portion.

8. The motor with a brake according to claim 1, characterized in that the power source wire and the brake wire extend in the brake housing close to an inner wall surface of the brake housing.

9. The motor with a brake according to claim 1, characterized in that an insulating tube is fitted on the electrical connection portion.

10. The motor with a brake according to claim 1, characterized in that a stator and a rotor are provided in the motor housing, a through hole through which the power source wire penetrates in a radial direction is provided in a peripheral wall of the motor housing, a cover that covers a wire leading-out portion from which the power source wire leads out of the motor housing via the through hole is fixed to the motor housing, a brake coil is provided in the brake housing, and the brake wire leads out from the brake coil toward a side opposite to the motor housing. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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