Motor, steering system and vehicle

Abstract

The utility model provides a motor, a steering system and a vehicle. The motor comprises a shell and a partition plate, the partition plate is arranged in the shell, the partition plate and the shell form a first cavity and a second cavity, the first cavity is used for containing a circuit board, and the second cavity is used for containing a winding; the motor further comprises a connecting piece, a wire penetrating hole is formed in the partition plate, the connecting piece is used for penetrating through the wire penetrating hole to be connected with the circuit board and the winding, a first opening is formed in the portion, on the first side wall of the first cavity, of the wire penetrating hole, and a second opening is formed in the portion, on the second side wall of the second cavity, of the wire penetrating hole. The threading hole forms a second opening in the second side wall of the second cavity, and the area of the first opening is larger than that of the second opening. The motor provided by the utility model has the effects of preventing short circuit between the terminal and the partition plate, reducing the possibility that tin enters the motor in the welding process, and improving the reliability of the motor.

Description

Technical Field

[0001] The utility model generally relates to the technical field of motors, and more specifically to a motor, a steering system and a vehicle. Background Art

[0002] At present, the terminals of the windings in the existing motors are soldered to the circuit board. In the existing structure, the distance between the terminals and the housing is relatively close, which easily leads to a short circuit between the terminals and the housing after welding. If the distance between the terminals and the housing is simply increased, the tin is likely to fall into the motor during the welding process, causing abnormal noise or causing the motor to get stuck, affecting the performance of the motor. Utility Model Content

[0003] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0004] In order to at least partially solve the above problems, the utility model provides a motor in a first aspect, the motor comprising a housing and a partition, the partition being arranged in the housing to form a first chamber and a second chamber with the housing, the first chamber being used to accommodate a circuit board, and the second chamber being used to accommodate a winding;

[0005] The motor also includes a connecting piece, the partition is provided with a threading hole, the connecting piece is used to connect the circuit board and the winding through the threading hole, the threading hole forms a first opening on the first side wall of the first chamber, and the threading hole forms a second opening on the second side wall of the second chamber, and the area of ​​the first opening is larger than the area of ​​the second opening.

[0006] According to the motor of the first aspect of the utility model, the connecting piece of the motor winding is passed through the threading hole to the partition, so as to be connected to the circuit board. Since the first opening of the threading hole close to the circuit board is larger, a larger avoidance space is provided for the connecting piece, so that the part of the connecting piece close to the circuit board is not easy to contact the threading hole, thereby preventing the connecting piece and the partition from being short-circuited when welding the circuit board and the connecting piece, preventing motor failure and improving the reliability of the motor. In addition, since the area of ​​the second opening is smaller, the possibility of tin entering the motor during welding can be reduced, thereby ensuring the performance of the motor and reducing the possibility of abnormal noise and jamming of the motor.

[0007] Optionally, the diameter of the threading hole decreases along the depth direction.

[0008] Optionally, the threading hole includes a first hole and a second hole, the first hole is connected to the second hole, the first hole is connected to the first chamber, and the second hole is connected to the second chamber; the cross-sectional area of ​​the first hole perpendicular to the depth direction is larger than the cross-sectional area of ​​the second hole perpendicular to the depth direction.

[0009] Optionally, a dimension of the first hole along the depth direction is greater than a dimension of the second hole along the depth direction.

[0010] Optionally, a size of the first hole along the depth direction is at least twice a size of the second hole along the depth direction.

[0011] Optionally, the cross-section of the threading hole is square or circular.

[0012] Optionally, the partition is provided with a mounting step for bonding the circuit board, and a dimension of the mounting step along a thickness direction is smaller than a dimension of the first hole along the thickness direction.

[0013] Optionally, the mounting step extends along the side wall of the partition to between adjacent first holes.

[0014] Optionally, the partition is provided with a flange portion and a center protrusion portion, the flange portion extends along the edge of the partition, the center protrusion portion protrudes from the center of the second side wall, the flange portion and the center protrusion portion constitute a matching groove, the matching groove is used to match with the end of the winding, and the second hole is connected to the matching groove.

[0015] Optionally, a cross-sectional area of ​​the matching groove perpendicular to the depth direction is larger than a cross-sectional area of ​​the first hole perpendicular to the depth direction.

[0016] Optionally, an insulating sleeve is further included, wherein the insulating sleeve is passed through the wire threading hole, and the insulating sleeve is sleeved on the connecting piece.

[0017] Optionally include:

[0018] A stator assembly, the stator assembly comprising an insulating frame and a winding, the insulating frame being arranged in the housing, and the winding being arranged on the insulating frame;

[0019] A rotor assembly, the rotor assembly comprising a motor shaft and a rotor core, the motor shaft is inserted into the housing and is rotatable relative to the housing, and the rotor core is disposed on the motor rotor;

[0020] At least a portion of the stator assembly and at least a portion of the rotor assembly are mounted in the second chamber;

[0021] A circuit board is installed in the first chamber.

[0022] Optionally, one end of the motor shaft passes through the partition and is provided with a tail magnetic ring, and the circuit board is provided with a position chip, and the position chip is used to sense the tail magnetic ring.

[0023] A second aspect of the utility model provides a steering system, comprising the motor according to the above.

[0024] According to the steering system of the second aspect of the utility model, the above-mentioned motor is adopted, and motor failure is less likely to occur, so that the performance of the steering system is more stable.

[0025] A third aspect of the utility model provides a vehicle, comprising the motor according to the above; or comprising the steering system according to the above.

[0026] The vehicle according to the third aspect of the utility model adopts the above-mentioned motor, which ensures the reliability and stable performance of various systems of the vehicle including the above-mentioned motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0028] Figure 1 A three-dimensional schematic diagram of a partition of a motor according to a preferred embodiment of the utility model;

[0029] Figure 2 for Figure 1 Schematic diagram of the internal structure of the partition;

[0030] Figure 3 for Figure 2 An enlarged schematic diagram of part A in FIG.

[0031] Figure 4 This is a schematic diagram of the internal structure of a motor according to a preferred embodiment of the present utility model;

[0032] Figure 5 for Figure 4 A schematic diagram of the installation of the partition and the circuit board; and

[0033] Figure 6 This is a schematic diagram of a steering system according to a preferred embodiment of the present invention.

[0034] Description of Reference Numerals

[0035] 100: Partition 101: Installation steps

[0036] 102: threading hole 103: first hole

[0037] 104: Second hole 105: Bearing hole

[0038] 106: first side wall 107: second side wall

[0039] 108: flange portion 109: center raised portion

[0040] 110: Housing 111: Back cover

[0041] 120: stator assembly 121: insulation frame

[0042] 122: Winding 123: Terminal

[0043] 124: Insulation sleeve 130: Rotor assembly

[0044] 131: Motor shaft 132: Rotor core

[0045] 133: Tail magnetic ring 140: Bearing

[0046] 150: Circuit board 151: Position chip

[0047] 160: Connector 170: Steering system

[0048] 171: Steering wheel 172: Steering shaft

[0049] 173: Universal shaft 174: Reducer

[0050] 175: Rotation axis 176: Angle torque sensor

[0051] 177: Rack and pinion mechanism 178: Tie rod

[0052] 179: Wheel 180: Motor

[0053] 190: Matching groove Z: thickness direction DETAILED DESCRIPTION

[0054] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0055] In this document, ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0056] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0057] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0058] Unless otherwise stated, the numerical ranges herein include not only the entire range within its two endpoints but also include several sub-ranges contained therein.

[0059] Figures 1 to 3 A motor 180 according to the present invention is shown, combined with Figure 4 and Figure 5 As shown, the motor 180 includes a housing 110 and a partition 100 . The partition 100 is disposed in the housing 110 to form a first chamber and a second chamber with the housing 110 . The first chamber is used to accommodate the circuit board 150 , and the second chamber is used to accommodate the winding 122 .

[0060] The motor further includes a connector, and the partition 100 is provided with a threading hole 102, and the connector is used to pass through the threading hole 102 to connect the circuit board 150 and the winding 122. The threading hole 102 is formed with a first opening on the first side wall 106, and the threading hole 102 is formed with a second opening on the second side wall 107, and the area of ​​the first opening is larger than the area of ​​the second opening.

[0061] According to the motor 180 of the utility model, the connector of the winding 122 of the motor 180 is passed through the threading hole 102 to the partition 100, so as to be welded with the circuit board 150. Since the first opening of the threading hole 102 close to the circuit board 150 is larger, a larger escape space is provided for the connector, so that the part of the connector close to the circuit board 150 is not easy to contact the threading hole 102 during welding, thereby preventing the connector from short-circuiting with the partition 100, preventing the motor 180 from malfunctioning, and improving the reliability of the motor 180. In addition, since the area of ​​the second opening is smaller, the possibility of tin entering the motor 180 during welding can be reduced, the performance of the motor 180 is guaranteed, and the possibility of abnormal noise and jamming of the motor 180 is reduced.

[0062] Optionally, the circuit board 150 is used to integrate the circuit for controlling the operation of the motor. The connecting member may be a terminal 123 of the winding 122 , and the terminal 123 is connected to the circuit board 150 through the threading hole 102 .

[0063] Optionally, the diameter of the threading hole 102 gradually decreases along the depth direction (ie, the thickness direction Z). In other words, the threading hole 102 is a tapered hole, which can also prevent the terminal 123 near the circuit board 150 from contacting the inner wall of the threading hole 102 during welding.

[0064] The side wall of the partition 100 close to the first chamber is the first side wall 106 , and the side wall of the partition 100 close to the second chamber is the second side wall 107 .

[0065] As a main embodiment, the threading hole 102 includes a first hole 103 and a second hole 104, the first hole 103 is connected to the second hole 104, the first hole 103 is connected to the first side wall 106 of the partition 100 (that is, the first hole 103 is connected to the first chamber), and the second hole 104 is connected to the second side wall 107 of the partition 100 (that is, the second hole 104 is connected to the second chamber). The cross-sectional area of ​​the first hole 103 perpendicular to the depth direction (that is, the thickness direction Z) is greater than the cross-sectional area of ​​the second hole 104 perpendicular to the depth direction (that is, the thickness direction Z). Therefore, the portion of the terminal 123 close to the circuit board 150 is not easy to contact the first hole 103 during welding, thereby further preventing the terminal 123 from short-circuiting with the partition 100.

[0066] Reference Figures 1 to 3 , the first side wall 106 is provided with a mounting step 101 for bonding the circuit board. The dimension of the first hole 103 along the depth direction (i.e., the thickness direction Z) is greater than the dimension of the second hole 104 along the depth direction (i.e., the thickness direction Z). In other words, the depth of the first hole 103 is greater than the depth of the second hole 104, so that there is a sufficient buffer distance between the second hole 104 and the mounting step 101. The greater the depth of the first hole 103, the easier it is for the thermal conductive adhesive to adhere to enter, thereby preventing the thermal conductive adhesive from entering the motor 180 through the second hole 104 when bonding the circuit board 150, protecting the internal structure of the motor 180, and improving the reliability of the motor 180.

[0067] Furthermore, the size of the first hole 103 along the depth direction (i.e., the thickness direction Z) is at least twice the size of the second hole 104 along the depth direction (i.e., the thickness direction Z), thereby further ensuring that there is sufficient buffer distance between the second hole 104 and the mounting step 101 to prevent the thermal conductive adhesive from entering the interior of the motor 180 through the second hole 104.

[0068] Reference Figure 1The cross section of the threading hole 102 perpendicular to the depth direction (ie, the thickness direction Z) is square, that is, the opening of the threading hole 102 is square. Optionally, the opening of the threading hole 102 may also be circular.

[0069] Reference Figure 1 and Figure 2 The mounting step 101 protrudes from the first side wall 106 of the partition 100, combined with Figure 4 and Figure 5 As shown, the circuit board 150 is attached to the mounting step 101 and a gap (which may be 0.5 mm) is left between the circuit board 150 and the mounting step 101 to fill the gap between the circuit board 150 and the mounting step 101 with thermal conductive adhesive, thereby improving the heat dissipation performance of the motor 180. The size of the partition 100 along the thickness direction Z is limited, and the size of the mounting step 101 along the thickness direction Z is smaller than the size of the first hole 103 along the thickness direction Z, so that the first hole 103 can be guaranteed to have a sufficient depth along the thickness direction Z, thereby delaying the thermal conductive adhesive overflowing the mounting step 101, preventing the thermal conductive adhesive from entering the motor 180 through the second hole 104, and playing a certain protective role for the motor 180.

[0070] Reference Figure 1 The mounting step 101 extends along the first side wall 106 to between adjacent first holes 103 , so that the thermal conductive adhesive can also cover between adjacent first holes 103 , thereby dissipating the heat of the terminal 123 in the threading hole 102 , further improving the heat dissipation performance of the motor 180 .

[0071] Reference Figure 1 and Figure 2 The second side wall 107 of the partition 100 is provided with a flange portion 108 and a central protrusion 109. The flange portion 108 extends along the edge of the partition 100, and the central protrusion 109 protrudes from the center of the second side wall 107. Figure 4 As shown, the flange portion 108 and the central protrusion 109 constitute a matching groove 190, and the matching groove 190 is used to match with the end of the winding 122, and the second hole 104 is connected to the matching groove 190. The setting of the matching groove 190 is conducive to stabilizing the winding 122 in the motor 180, making the terminal 123 more stable relative to the partition 100, and it is not easy to cause the terminal 123 to deviate and contact the partition 100, further improving the reliability of the motor 180.

[0072] Furthermore, the cross-sectional area of ​​the mating groove 190 perpendicular to the depth direction (i.e., the thickness direction Z) is larger than the cross-sectional area of ​​the first hole 103 perpendicular to the depth direction (i.e., the thickness direction Z), so that the mating groove 190 has sufficient avoidance space, which is beneficial to prevent the terminal 123 from contacting the partition 100 when shaking relative to the partition 100, thereby preventing the terminal 123 from short-circuiting with the partition 100 and causing the motor 180 to malfunction, thereby improving the reliability of the motor 180.

[0073] Reference Figure 4 , the second side wall 107 of the partition 100 is connected to the housing 110. The winding 122 is arranged in the housing 110, and the winding 122 is provided with a terminal 123, and the terminal 123 (i.e., the connecting piece of the motor) is passed through the partition 100. The circuit board 150 is arranged on the first side wall 106 (i.e., arranged on the installation step 101), and the circuit board 150 is connected to the terminal 123.

[0074] Reference Figure 4 The motor 180 further includes an insulating sleeve 124, which is inserted into the threading hole 102, and the insulating sleeve 124 is sleeved onto the terminal 123 to prevent the terminal 123 from being short-circuited with the partition 100. Optionally, the insulating sleeve 124 and the second hole 104 are clearance-matched to facilitate the installation of the terminal 123. The clearance between the insulating sleeve 124 and the second hole 104 is 0.1 mm to 0.5 mm, thereby preventing the tin beads generated by the welding terminal 123 or the thermal conductive glue overflowing from the bonding circuit board 150 from entering the housing 110 through the second hole 104, thereby protecting the winding 122 and other structures in the housing 110.

[0075] Reference Figure 4 According to the utility model, the motor 180 includes a stator assembly 120 and a rotor assembly 130. The stator assembly 120 includes the above-mentioned winding 122 and an insulating frame 121, the insulating frame 121 is arranged in the housing 110, and the winding 122 is arranged on the insulating frame 121. Further, the stator assembly 120 and the rotor assembly 130 are installed in the second chamber, and the circuit board is installed in the first chamber.

[0076] In detail, the winding 122 protrudes from the insulating frame 121 along the thickness direction Z and is provided with a bus bridge, which is provided with a three-phase terminal 123. The three-phase terminals 123 are respectively led out toward the first side wall 106 of the partition 100 through three threading holes 102 and connected to the circuit board 150. Figure 4 The circuit board 150 is provided with a connector 160 , which is disposed on the partition 100 and connected to the wiring harness, and is used to electrically connect an external power source to the winding 122 through the circuit board 150 , thereby controlling the operation of the motor 180 .

[0077] Reference Figure 4 The housing 110 further includes a back cover 111, which is disposed on the first side wall 106 of the partition 100. The back cover 111 is connected to the partition 100 via fasteners, thereby forming a chamber for accommodating the circuit board 150 with the partition 100 to protect the circuit board 150.

[0078] The rotor assembly 130 includes a motor shaft 131 and a rotor core 132. A bearing hole 105 is provided in the central raised portion 109 of the partition 100, and a bearing 140 is provided in the bearing hole 105. A bearing 140 is also provided at the end of the housing 110 away from the partition 100. The two ends of the motor shaft 131 are respectively penetrated into the bearing 140 of the partition 100 and the bearing 140 of the housing 110, so that the motor shaft 131 can rotate relative to the housing 110 and the partition 100. The rotor core 132 is sleeved on the motor shaft 131, and a magnetic steel slot is provided on the rotor core 132, and a magnetic steel is provided in the magnetic steel slot, so that the rotor core 132 has magnetism. When the winding 122 of the stator assembly 120 is energized, the rotor core 132 drives the motor shaft 131 to rotate under the action of the magnetic field.

[0079] Optionally, refer to Figure 4 One end of the motor shaft 131 is passed through the partition 100 and is provided with a tail magnetic ring 133. The circuit board 150 is provided with a position chip 151, which is used to sense the tail magnetic ring 133, thereby sensing the overall operating parameters of the motor 180 (such as the speed, the rotation angle of the motor shaft 131, etc.).

[0080] Reference Figure 6 The present invention further provides a steering system 170, comprising the motor 180 described above. According to the steering system 170 of the present invention, the motor 180 described above is adopted, and the motor 180 is not prone to failure, so that the performance of the steering system 170 is more stable.

[0081] The steering system 170 according to the utility model is an electric power steering system 170. Specifically, the steering system 170 further includes a steering wheel 171, a steering shaft 172, a universal shaft 173, a reduction box 174, a rotating shaft 175, a rotation angle torque sensor 176, a gear rack mechanism 177 and a tie rod 178. The steering wheel 171 is connected to the steering shaft 172, the steering shaft 172 is connected to the reduction box 174 through the universal shaft 173, and the first end of the rotating shaft 175 is connected to the reduction box 174, and the second end of the rotating shaft 175 is connected to the gear in the gear rack mechanism 177. The rack in the gear rack mechanism 177 is connected to the wheel 179 through the tie rod 178. The rotation angle torque sensor 176 is arranged on the steering shaft 172, and is used to detect the rotation torque transmitted to the rotating shaft 175 by the user through the steering wheel 171. The motor 180 is disposed in and connected to the reduction box 174, and is used to transmit the torque of the motor 180 to the rotating shaft 175 through the reduction box 174, so as to provide electric assistance when the user drives the rack and pinion mechanism 177. When the rotating shaft 175 rotates, the rack and pinion structure is driven to convert the rotation torque into the pulling force of the traction rod 178, so as to drive the wheel 179 to steer.

[0082] According to the steering mechanism of the present invention, the above-mentioned motor 180 is adopted, which not only has more reliable performance and high safety, but also has good control accuracy.

[0083] The utility model further provides a vehicle, comprising the motor 180 according to the above. According to the vehicle of the utility model, the motor 180 is adopted, which ensures the reliability and stable performance of each system of the vehicle including the motor 180.

[0084] The utility model also provides a vehicle, comprising the above-mentioned steering system 170. According to the vehicle of the utility model, the performance of the steering system 170 is more stable and the failure rate is low.

[0085] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" appearing in this article may indicate that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0086] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of the protection claimed by the utility model.

Claims

1. A motor, characterized in that: The motor comprises a housing and a partition, wherein the partition is arranged in the housing and forms a first chamber and a second chamber with the housing, wherein the first chamber is used to accommodate a circuit board, and the second chamber is used to accommodate a winding; The motor also includes a connecting piece, the partition is provided with a threading hole, the connecting piece is used to connect the circuit board and the winding through the threading hole, the threading hole forms a first opening on the first side wall of the first chamber, and the threading hole forms a second opening on the second side wall of the second chamber, and the area of ​​the first opening is larger than the area of ​​the second opening.

2. The motor according to claim 1, characterized in that The diameter of the threading hole decreases along the depth direction.

3. The motor according to claim 1, characterized in that The threading hole includes a first hole and a second hole, the first hole is connected to the second hole, the first hole is connected to the first chamber, and the second hole is connected to the second chamber; the cross-sectional area of ​​the first hole perpendicular to the depth direction is larger than the cross-sectional area of ​​the second hole perpendicular to the depth direction.

4. The motor according to claim 3, characterized in that A dimension of the first hole along the depth direction is greater than a dimension of the second hole along the depth direction.

5. The motor according to claim 4, characterized in that A dimension of the first hole along the depth direction is at least twice a dimension of the second hole along the depth direction.

6. The motor according to claim 1, characterized in that The cross section of the threading hole is square or circular.

7. The motor according to claim 3, characterized in that The partition is provided with a mounting step for bonding the circuit board, and a dimension of the mounting step along a thickness direction is smaller than a dimension of the first hole along the thickness direction.

8. The motor according to claim 7, characterized in that The mounting step extends along the side wall of the partition plate to between adjacent first holes.

9. The motor according to claim 3, characterized in that The partition is provided with a flange portion and a center protrusion portion, the flange portion extends along the edge of the partition, the center protrusion portion protrudes from the center of the second side wall, the flange portion and the center protrusion portion constitute a matching groove, the matching groove is used to match with the end of the winding, and the second hole is connected to the matching groove.

10. The motor according to claim 9, characterized in that A cross-sectional area of ​​the matching groove perpendicular to the depth direction is larger than a cross-sectional area of ​​the first hole perpendicular to the depth direction.

11. The motor according to claim 1, characterized in that It also includes an insulating sleeve, which is inserted into the threading hole and sleeved on the connecting piece.

12. The motor according to claim 1, characterized in that include: A stator assembly, the stator assembly comprising an insulating frame and a winding, the insulating frame being arranged in the housing, and the winding being arranged on the insulating frame; A rotor assembly, the rotor assembly comprising a motor shaft and a rotor core, the motor shaft is inserted into the housing and is rotatable relative to the housing, and the rotor core is disposed on the motor rotor; At least a portion of the stator assembly and at least a portion of the rotor assembly are mounted in the second chamber; A circuit board is installed in the first chamber.

13. The motor according to claim 12, characterized in that One end of the motor shaft is passed through the partition and is provided with a tail magnetic ring, and the circuit board is provided with a position chip, and the position chip is used to sense the tail magnetic ring.

14. A steering system, characterized in that: Comprising an electric machine according to any one of claims 1 to 13.

15. A vehicle, characterized in that: comprising an electric machine according to any one of claims 1 to 13; or comprising a steering system according to claim 14.

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