TWI759148B - Motor unit and motor-driven device for anti-lock braking system - Google Patents

Abstract

A motor unit and a motor-driven device for an anti-lock braking system are disclosed. The motor unit includes a housing, a motor disposed in the housing, and a bearing disposed at the bottom edge of the housing, wherein the bearing partially protrudes from the bottom edge of the housing.

Description

Motor units and motor drives for anti-lock braking systems

The present invention relates to a motor unit and a motor driving device for an anti-lock braking system, in particular to a motor unit and a motor driving device with a bearing part protruding out of a casing of the motor.

For driving safety, most vehicles today are equipped with an Anti-lock Braking System, which has the ability to adjust the braking action of the wheels and adjust the actuation force when driving encounters emergency situations or poor road conditions. To avoid vehicle loss of control due to tire locking or slipping.

Generally, the anti-lock braking system can adjust the actuating force through the combination of software (such as arithmetic program), hardware (such as controller) and transmission mechanism, so as to enhance the maneuverability of the vehicle in various situations. It is the current mainstream to use hydraulic devices as transmission mechanisms in anti-lock braking systems. However, hydraulic devices used in anti-lock braking systems usually have multiple components, which require multiple processes during assembly and have limited sealability. High standards are required, so welding is the usual means of fitting and sealing.

However, although welding is easy to apply to complex joint surfaces of components, it is not resistant to vibration and high temperature, and hydraulic devices equipped with motors and pumps will generate vibration and heat during operation. After a long time, the components in hydraulic devices will There is a concern that the seal will gradually weaken, especially when driving under conditions. Sudden braking, vibration and high temperature generated by hydraulic devices under high-speed operation may also directly lead to the fracture and separation of welded components, making the anti-lock braking system useless.

As the main force for driving the hydraulic device, the motor needs to carry a large force and load, especially during operation, it will generate stress and vibration, so it needs to be closely arranged in the hydraulic device. When the conventional motor is placed in the base of the hydraulic device, due to the poor dimensional accuracy of the motor casing and its moderate rigidity, the loose fitting method is usually adopted to allow a gap between the motor casing and the inner wall of the base, and then the Fill the gap to position the motor or weld directly to seal the motor. However, it is difficult to control the welding quality and the quality of the caulking method, which may easily cause the motor to be out of position, resulting in the failure of the components due to the deviation of the driving torque or the inability to disperse the load during the operation of the motor.

Therefore, in order to overcome the shortcomings of the prior art, in the motor unit of the embodiment of the present invention, the bearing is partially exposed on the lower edge of the housing, and the bearing extends beyond the lower edge of the housing. The combination relationship is simplified, and the motor unit is fixed and sealed in the body of the motor drive device by means of riveting. In this way, the use of welding and caulking methods to assemble the motor unit for sealing and positioning the motor drive device can be avoided, thereby reducing the probability of incorrect position of the motor unit.

Based on at least one of the foregoing objectives, the motor driving device of the embodiment of the present invention includes a main body and a motor unit, wherein the main body has a setting groove for accommodating the motor unit therein, and the external shape of the bearing of the motor unit exposed to the outside is the same as the part of the setting groove for accommodating the bearing. Correspondingly, the motor unit can be assembled by means of tight fitting, so that the exposed surface of the bearing can closely and precisely fit the inner wall of the setting groove and position the motor unit, thereby improving the bonding degree between the motor unit and the motor drive device. Strengthen the structural relationship between the motor unit and the motor drive device to achieve the effect of dispersing the load.

Based on at least one of the foregoing objectives, an embodiment of the present invention provides a motor unit, which includes a housing, a motor assembly provided in the housing, and a bearing provided on a lower edge of the housing, wherein the bearing portion protrudes from the lower edge of the housing.

Optionally, the motor unit further includes a rotating element disposed below the bearing, wherein the rotating element is connected to the rotating shaft of the motor assembly.

Optionally, the bearing is a ball bearing, and the rotating element is an eccentric.

Optionally, the bearing has an upper half and a lower half, the upper half of the bearing is located in the housing, and the lower half of the bearing is exposed to the outside.

Optionally, the bearing has an upper half and a lower half, the upper half of the bearing is combined with the lower edge of the housing, and the lower half of the bearing protrudes from the lower edge of the housing.

Optionally, the height of the upper half of the bearing is equal to the height of the lower edge of the housing.

Optionally, the outer diameter of the bearing is equal to or smaller than the inner diameter of the lower edge of the housing.

Based on at least one of the foregoing objectives, an embodiment of the present invention provides a motor drive device, which includes a main body and the above-mentioned motor unit, wherein the motor unit is arranged in a setting groove of the main body, and the bearing of the motor unit protrudes from the outer wall of the lower edge of the casing and the main body The inner wall of the setting groove is fitted.

Optionally, the motor driving device further includes an actuating element disposed in the body and drivingly connected to the motor unit.

Optionally, the motor driving device is an anti-lock braking device, and the actuating element is an oil return pump.

In short, the motor unit and the motor drive device provided by the embodiments of the present invention utilize the improved structural positions of the motor unit components, such as bearings partially protruding from the housing, to simplify their combination relationship, thereby reducing assembly procedures and avoiding the use of welding Seal. In this way, the positioning method in which the motor bearing directly contacts the inner wall of the body can improve the correctness of the motor orientation and effectively distribute the load, and then Ensuring that the motor unit operates properly, it is advantageous for various markets (eg vehicle manufacturers, locomotive manufacturers, ABS manufacturers, etc.) that require motor drive devices, such as anti-lock braking devices.

In order to make the above-mentioned and other objects, features and advantages of the present invention more apparent and comprehensible, a detailed description is given as follows in conjunction with the accompanying drawings.

1: Motor drive device

10: Ontology

11, 13: Setting slot

20, 30: Motor unit

21, 31: Shell

25, 35: Motor assembly

27, 37: Bearings

29, 39: Rotating elements

40: Actuating element

100: Electronic Control Unit

110: upper cover

120: Control panel

130: Unit body

211, 311: lower edge

213, 313: main body

215, 315: Bottom

251, 351: shaft

317: Subbottom

319: next lower edge

1011: Upper Surface

1012: First Side

E: Electronic components

M: Mechanism component

FIG. 1 is a schematic diagram of a motor unit according to an embodiment of the present invention.

2 is a cross-sectional view of a motor unit according to an embodiment of the present invention.

FIG. 3 is a schematic diagram illustrating the assembly of the motor unit to the main body of the motor driving device according to the embodiment of the present invention.

4 is a cross-sectional view of the motor unit assembled to the main body of the motor driving device according to the embodiment of the present invention.

5 is a cross-sectional view of a motor unit assembled to a motor drive device body according to another embodiment of the present invention.

FIG. 6 is a schematic diagram of a motor driving device according to an embodiment of the present invention.

FIG. 7 is another schematic diagram of the motor driving device according to the embodiment of the present invention.

FIG. 8 is an exploded view of the motor drive device according to the embodiment of the present invention.

FIG. 9 is a cross-sectional view of a motor driving device according to an embodiment of the present invention.

In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail by the following specific embodiments and the accompanying drawings. The description is as follows.

An embodiment of the present invention provides a motor unit, including a motor assembly, a casing for accommodating the motor assembly, and a bearing assembled on the lower edge of the casing, wherein the part of the bearing part protruding from the lower edge of the casing is exposed. The main body of the motor drive device has a plurality of communicating setting grooves for setting the motor unit and the actuating element respectively, wherein the exposed surface of the bearing of the motor unit is in contact with the inner wall of the setting groove, and the actuating element passes through the communicating setting The groove is connected to the motor drive. Since the housing and the bearing of the motor unit have a combined structure matched with the arranging grooves of the main body, the combination of each component in the motor unit and the main body after assembly is more stable, and the assembly process can also be simplified. Therefore, the embodiments of the present invention also provide a motor driving device.

First, please refer to FIG. 1 and FIG. 2 , which are a schematic diagram and a cross-sectional view of a motor unit according to an embodiment of the present invention, respectively. As shown in the figure, the motor unit 20 of the embodiment of the present invention is roughly cylindrical, and has a casing 21 , a motor assembly 25 , a bearing 27 and a rotating element 29 , wherein the motor assembly 25 is arranged in the casing 21 , the bearing 27 and the rotating element 29 It is arranged below the casing 21 . The motor assembly 25 includes a rotating shaft 251 , a general motor circuit, a stator and a rotor, etc. The type of the motor assembly is not intended to limit the present invention. The rotating shaft 251 of the motor assembly 25 sequentially penetrates the housing 21 , the bearing 27 and the rotating element 29 and is connected to the rotating element 29 so as to drive the rotating element 29 to act. The bearing 27 is arranged between the casing 21 and the rotating element 29 and is connected to the lower part of the casing 21 , and part of the bearing 27 protrudes from the place connected to the casing 21 and is exposed.

The casing 21 is a hollow cylinder with openings at the upper and lower ends, and has an accommodating space therein for arranging the motor assembly 25 . The housing 21 can be subdivided into three parts: a main body 213 , a bottom part 215 and a lower edge 211 , wherein the lower part of the main body 213 is connected to one end of the bottom part 215 and the other end of the bottom part 215 is connected to the lower edge 211 . The main body 213 is perpendicular to the bottom 215 so that there is a roughly right angle therebetween, and the lower edge 211 is also perpendicular to the bottom 215 so that the two are roughly at a right angle, wherein the lower edge 211 and the main body 213 are roughly parallel to each other but face opposite directions from the bottom 215 extension. In this way, the upper and lower openings of the casing 21 are respectively formed on the main body 213 and the lower edge 211 of the casing 21, and the motor The component 25 can be assembled in the inner space of the main body 213 through the upper opening, and the bearing 27 can be assembled in the inner space of the lower edge 211 through the lower opening.

In this embodiment, the axis of the casing 21 is straight, the main body 213 is disposed in a straight direction, the part where the main body 213 connects to the bottom 215 is bent inwardly so that the bottom 215 is inwardly shrunk horizontally, and the bottom 215 is connected to the lower edge 211 The lower edge 211 is bent downward to make the lower edge 211 a convex straight arrangement. As shown in the figure, the diameter of the main body 213 is larger than the diameter of the lower edge 211 , that is, the diameter of the opening above the casing 21 is larger than the diameter of the opening below the casing 21 , but the present invention does not limit the shape of the casing, for example, the main body 213 and the bottom The connection of 215 can be bent outward so that the diameter of the main body 213 is smaller than the diameter of the lower edge 211 . In one embodiment, the housing 21 is an integrally formed element, but it can also be composed of a plurality of elements, and the present invention is not limited thereto.

The bearing 27 is a hollow annular body, the outer diameter of which is approximately equal to the inner diameter of the lower edge 211 of the housing 21, that is, the outer diameter of the bearing 27 is equal to or smaller than the inner diameter of the lower edge 211 of the housing 21, so that the bearing 27 can be It is connected with the casing 21 by the lower edge 211 . The bearing 27 is fixed on the lower edge 211 of the housing 21 and protrudes from the lower edge 211 . In this embodiment, the bearing 27 is disposed below the housing 21 and protrudes downward in a manner that its axis is parallel to the axis of the housing 21 . out of the lower edge 211 of the casing 21 . The bearing 27 combined with the housing 21 is used to carry the load and support the rotating shaft 251, so that the motor assembly 25 (eg, but not limited to, the rotor) can rotate smoothly.

In detail, the bearing 27 has an upper half and a lower half, the upper half is located inside the housing 21 and is combined with the lower edge 211 , and the lower half protrudes from the lower edge 211 of the housing 21 and is exposed to the outside. The height of the upper half of the bearing 27 is approximately equal to or equal to the height of the lower edge 211 of the housing 21 , and the outer surface/outer wall of the upper half of the bearing 27 is abutted against the inner wall of the lower edge 211 of the housing 21 . That is, the upper half of the bearing 27 is located inside the lower edge 211 of the housing 21 . Also, as shown in the figure, the bearing 27 preferably does not go beyond the bottom 215 into the interior of the main body 213 , but the invention is not limited to this, and the bearing 27 can also occupy the inner space of the main body 213 . In this embodiment, the bearing 27 is combined with the housing 21 in an interference-fitting or tight-fitting configuration, but the present invention does not Accordingly, the fixing method between the bearing 27 and the housing 21 is defined. The bearing 27 is preferably a rolling bearing, such as a ball bearing or a roller bearing, but the present invention does not limit the type of the bearing 27, and can also be a sliding bearing, a spherical plain bearing, an oil-impregnated bearing, and the like.

The rotating element 29 is located below the bearing 27 and is connected to the rotating shaft 251 of the motor assembly 25 . When the motor unit 20 is running, the rotating shaft 251 is driven, thereby driving the rotating element 29 to rotate. Therefore, the housing 21 , the bearing 27 and the rotating element 29 of the motor unit 20 are coaxial. In one embodiment, the bearing 27 is a ball bearing, and the rotating element 29 is an eccentric, but the present invention does not limit the types of the bearing 27 and the rotating element 29 accordingly.

Next, please refer to FIG. 3 and FIG. 4 at the same time, which are schematic diagrams before and after the motor unit is assembled to the body of the motor drive device according to an embodiment of the present invention and a cross-sectional view after assembly, respectively. The main body 10 of the motor drive device has a setting groove 11, wherein the setting groove 11 is a groove extending downward from the upper surface 1011 of the main body 10, and the shape of the inner wall of the setting groove 11 corresponds to the appearance shape of the motor unit 20, so as to accommodate the motor unit 20. As shown in the figure, the appearance structure of the motor unit 20 is mainly composed of a casing 21, a bearing 27 and a rotating element 29. Since the three elements are all cylindrical and are in a coaxial relationship, the circles or outer diameters after stacking in sequence are from large to large. Therefore, the shape of the inner wall of the setting groove 11 also corresponds to a plurality of segment surfaces, and the inner diameters of the plurality of segment surfaces are also arranged in descending order from the upper surface 1011 of the main body 10 downward.

When assembling the motor unit 20 to the setting groove 11 of the main body 10 , the motor unit 20 is inserted into the main body 10 with the bearing 27 and the rotating element 29 facing the setting groove 11 , so that the motor unit 20 can be easily installed in the setting groove of the main body 10 11. In the motor unit 20 assembled to the main body 10 , except that the rotating element 29 needs space to rotate and is not in contact with the inner wall of the setting groove 11 during assembly, the housing 21 and the bearing 27 both have partial areas in contact with the inner wall of the setting groove 11 . The main body 213 , the bottom 215 and the lower edge 211 of the casing 21 are respectively attached to the inner wall of the setting groove 11 , wherein, in this embodiment, the depth of the groove of the setting groove 11 of the main body 10 can only accommodate part of the motor unit 20 (mainly the lower half of the motor unit 20), so that the main body 213 of the housing 21 has only part The sub-regions are located in the setting groove 11 and fit with the inner wall of the setting groove 11 , but the present invention does not limit the size of the accommodating space of the setting groove 11 of the main body 10 accordingly.

The outer wall of the bearing 27 protruding from the lower edge 211 of the housing 21 is in contact with the inner wall of the setting groove 11 , preferably, the two are in close contact. Different from the housing 21, the bearing 27 is a precision component with high dimensional accuracy and high rigidity, which can support the rotating shaft 251 and guide the rotation of the rotating shaft 251, and can also bear the parts idling on the rotating shaft 251 (such as, but not limited to, the rotating element. 29). Therefore, the bearing 27 can be arranged in the setting groove 211 in a closely arranged manner, and closely fit with the inner wall of the setting groove 211, so that the motor unit 20 can be set in a positive direction, and the axis of the motor unit 20 is straight and does not offset, and the motor unit is improved. Concentricity of each component in 20. In addition, the outer wall of the upper half of the bearing 27 is in close contact with the inner wall of the lower edge 211 of the housing 21, and the outer wall of the lower half of the bearing 27 is in close contact with the inner wall of the setting groove 11 of the main body 10. The load generated during the operation of the unit 20 is distributed to the main body 10 , so as to prevent the motor unit 20 from damaging components or related structures due to excessive vibration stress and heavy load. However, the present invention does not limit the arrangement between the bearing 27 and the arrangement groove 11, and it can also be an interference assembly or an interference assembly.

In one embodiment, the motor unit 20 is assembled in the setting groove 11 of the main body 10 by means of press fitting, but the present invention does not limit the assembly method accordingly.

Please refer to FIG. 5 , which is a cross-sectional view of a motor unit assembled to a body of a motor drive device according to another embodiment of the present invention. Motor unit 30 has similar components and component configurations as motor unit 20, including housing 31, motor assembly 35 disposed within housing 31, bearing 37 disposed below housing 31 and partially protruding outward, and a rotating shaft disposed below the bearing element 39 , and the rotating shaft 351 of the motor assembly 35 penetrates the housing 31 , the bearing 37 and the rotating element 39 and is connected to the rotating element 39 . The difference between the motor unit 30 and the motor unit 20 lies in the structure of the housing 31 of the motor unit 30 . Specifically, the housing 31 still has a main body 313 , a bottom 315 and a lower edge 311 , the bottom 315 and the lower edge 311 remain connected to each other, but there is an additional sub-bottom between the main body 313 and the bottom 315 . The main body 313 is connected to one end of the secondary bottom 317 , the other end of the secondary bottom 317 is connected to one end of the secondary lower edge 319 , and the other end of the secondary lower edge 319 is connected to the bottom 315 . Although the main body 313 and the bottom 315 are not directly connected, the extension lines of the two are still perpendicular and orthogonal, and the main body 313 is still parallel to the lower edge 311 .

As shown in the figure, when the motor unit 30 is assembled in the setting groove 11 of the main body 10 , the outer casing 31 of the motor unit 30 and the partial area of the bearing 37 will also fit with the inner wall of the setting groove 11 , wherein the casing 31 is located in the main body 10 . The inner part of the main body 313 , the bottom 315 and the lower edge 311 are all in contact with the inner wall of the setting groove 11 , and the part of the bearing 37 protruding from the lower edge 311 of the casing 31 , and its outer wall is in close contact with the inner wall of the setting groove 11 . As a result, the motor unit 30 can be positioned and the load can be distributed in the same way as the assembly structure of the motor unit 20 assembled to the main body 10 .

In other embodiments, the bottom 215 and the lower edge 211 of the casing 21 may be built-in structures, and only have the part of the main body 213 from the outside, but the accommodating space of the casing 21 has been separated into the inner space of the main body 213 and the lower edge. The inner space of 211 is used to set the motor assembly 25 and the convex bearing 27, respectively. Alternatively, if the outer diameter of the bearing 27 is approximately equal to the inner diameter of the main body 213 , the housing 21 can omit the bottom 215 and use the bottom section of the main body 213 as the lower edge 211 to provide the convex bearing 27 . As mentioned above, the present invention does not limit the shape of the casing 21, but the above-mentioned various casing structures do not escape the central concept that the bearing of the motor unit is protruded on the lower edge of the casing and the protruding part is exposed outside, so that the motor unit can be assembled during assembly. When reaching the main body of the motor drive unit, the outer wall of the bearing protruding part is closely fitted with the inner wall of the main body setting groove.

Please refer to FIG. 6 , which is a schematic diagram of a motor driving device according to an embodiment of the present invention. As shown in the figure, the motor drive device 1 (such as, but not limited to, an anti-lock braking device) according to an embodiment of the present invention is generally composed of an electronic component E and a mechanism component M, and the overall appearance is roughly a six-sided cuboid, wherein the electronic component The length of E is slightly longer than that of the mechanism member M, so the motor drive device 1 protrudes from the upper half of one side. Out of the lower half (or with a gap in the lower half). FIG. 7 is a schematic diagram of removing the electronic component E from the motor driving device according to the embodiment of the present invention. As shown, the mechanism member M includes a body 10, a motor unit 20 and an actuating element 40 (such as, but not limited to, an oil return pump).

Next, please refer to FIG. 8 , which is an exploded view of the motor drive device according to the embodiment of the present invention. As shown in the figure, the electronic component E of the motor driving device 1 of the embodiment of the present invention may be an electronic control unit 100 , wherein the electronic control unit 100 is electrically connected to the motor unit 20 for controlling the operation of the motor unit 20 . In one embodiment, the electronic control unit 100 is a microcontroller, and the motor unit 20 is a servo motor. However, the present invention does not limit the types of the electronic control unit 100 and the motor unit 20, nor does it limit the electronic control unit 100 and the motor unit 20. The connection relationship between them can be controlled as long as their actions can be controlled. The electronic control unit 100 includes an upper cover 110 , a control board 120 and a unit body 130 , wherein the upper cover 110 , the control board 120 and the unit body 130 are stacked and combined to form a slightly rectangular parallelepiped, wherein the unit body 130 has a space to be installed on the body 10 Then, the motor unit 20 protruding from the main body 10 after being assembled is wrapped and accommodated therein.

As shown in FIG. 8 , the main body 10 is approximately a six-sided rectangular parallelepiped and is provided with a plurality of connecting grooves. The upper surface 1011 has a setting groove 11 for assembling the motor unit 20 therein. The first side surface 1012 of the main body 10 has another setting groove 13 for the actuating element 40 to be assembled therein. The motor unit 20 is assembled in the setting slot 11 with its axis perpendicular to the upper surface 1011 of the main body, and the actuating element 40 is assembled with its axis parallel to the upper surface 1011 but perpendicular to the first side surface 1012 The other slot 13 is provided so that the axis of the motor unit 20 and the axis of the actuating element 40 are orthogonal to the direction line. This configuration can maximize the use of the space in the main body 10 while maintaining the functions of the individual components, thereby reducing the volume of the entire motor drive device 1 .

Referring to FIG. 9 at the same time, FIG. 9 is a cross-sectional view of a motor driving device according to an embodiment of the present invention. As shown in the figure, the setting groove 11 of the main body 10 is communicated with another setting groove 13, wherein the motor unit 20 is arranged therein The slot 11 is provided, and the actuating element 40 is arranged in the other slot 13 and is thus in driving connection with the motor unit 20 . In detail, the rotating element 29 of the motor unit 20 is connected to the actuating element 40 disposed in the other setting slot 13 and the motor unit 20 disposed in the setting slot 11 , wherein the motor unit 20 drives the actuating element 40 by driving the rotating element 29 action. In addition, the disposition of the bearing 27 can disperse the load exerted on the rotating element 29 and the motor unit 20 by the motor driving device 1 during operation. In addition, the overall arrangement of the motor unit 20 and the main body 10 can also increase the heat dissipation effect.

Next, the assembly process of the motor drive device according to the embodiment of the present invention will be described. First, obtain the motor unit 20, and confirm that the bearing 27 and the rotating element 29 have been combined with the motor assembly 25 and the housing 21 to form the motor unit 20, so as to be placed in the setting groove 11 of the main body 10 at one time. In one embodiment, the motor assembly 25 in the motor unit 20 has been installed in the housing 21 to form a motor, but the bearing 27 and the rotating element 29 have not been combined with the motor, and all the elements can be combined to form the motor unit 20 first. In other embodiments, the bearing 27 and the rotating element 29 are first assembled in the setting groove 11 in the main body 10 provided with a plurality of communicating setting grooves, wherein the bearing 27 and the rotating element 29 are arranged in the setting in a coaxially stacked manner. In the groove 11 , the bearing 27 is located above the rotating element 29 . Since the bearing 27 and the rotating element 29 interact with the motor in terms of structure and transmission function, it is preferable to assemble the motor unit 20 in advance, but the invention is not limited thereto.

Next, the motor unit 20 (or motor), for example but not limited to, is assembled into the setting groove 11 on the upper surface 1011 of the main body 10 by means of press fitting. Since the contour of the setting groove 11 is similar to the shape of the motor unit 20 , the housing 21 of the motor unit 20 can fit the inner wall of the setting groove 11 , and the exposed area of the bearing can closely fit the inner wall of the setting groove 11 . Next, the motor unit 20 is fixed in the setting groove 11 of the main body 10 by riveting.

Then, the actuating element 40 is assembled in the other setting groove 13 of the first side surface 1012 of the main body 10, wherein the two setting grooves 11 and 13 communicate with each other, so the actuating element 40 can be connected to the motor unit 20 by driving, The transmission connection is that the motor unit 20 is configured through the elements between the motor unit 20 and the actuating element 40 , such as, but not limited to, the bearing 27 and the rotating element 29 , to drive the rotating element 29 and indirectly drive the actuating element 40 to act during operation.

Finally, the electronic control unit 100 is assembled to the upper surface 1011 of the main body 10 , and the part of the motor unit 20 protruding from the upper surface 1011 of the main body 10 is covered. In this way, the assembly of the motor drive device 1 is completed.

Based on the above, compared with the prior art, the technical effects of the motor unit and the motor driving device according to the embodiments of the present invention are described as follows.

In the known technology, many components of the motor drive device are fixed, sealed and positioned by welding and caulking, but the quality of welding will directly affect the sealing performance of the components, and the welded joints are not shock-resistant. Inability to withstand high temperatures creates safety concerns when operating motor drives, while shims can cause misalignment of components. On the other hand, the motor unit and the motor drive device according to the embodiments of the present invention utilize the structure of the components to simplify the combination relationship, and can use the riveting technique to achieve the required positioning and fixation without welding, so as to ensure that the components will not be Damaged or broken due to vibration and high temperature caused by high-speed operation. Furthermore, in the motor unit of the present invention, the improved position of the bearing has the functions of supporting, positioning and dispersing the load, which can reduce the process of assembling to the main body, thereby improving the efficiency of assembling.

The present invention has been disclosed above with preferred embodiments, but those skilled in the art should understand that the above embodiments are only used to describe the present invention, and should not be construed as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to those of the foregoing embodiments should be considered to be included within the scope of the present invention. Therefore, the protection scope of the present invention should be defined by the scope of the patent application.

20: Motor unit

21: Shell

27: Bearings

29: Rotating element

211: Lower edge

213: Subject

Claims (10)

A motor unit for an anti-lock braking system, comprising: a casing; a motor assembly, arranged in the casing; and a bearing, fixed on the lower edge of the casing; wherein, the bearing part protrudes from the casing of the casing lower edge. The motor unit according to claim 1, further comprising: a rotating element disposed under the bearing and connected to the rotating shaft of the motor assembly. The motor unit of claim 2, wherein the bearing is a ball bearing, and the rotating element is an eccentric. The motor unit of claim 1, wherein the bearing has an upper half and a lower half, the upper half of the bearing is located in the housing, and the lower half of the bearing is exposed outside. The motor unit of claim 1, wherein the bearing has an upper half and a lower half, the upper half of the bearing is combined with the lower edge of the housing, and the lower half of the bearing protrudes from the housing. the lower edge. The motor unit of claim 5, wherein the height of the upper half of the bearing is equal to the height of the lower edge of the housing. The motor unit of claim 1, wherein the outer diameter of the bearing is equal to or smaller than the inner diameter of the lower edge of the housing. A motor drive device for an anti-lock braking system, comprising: a body with a setting groove; and The motor unit as claimed in claims 1 to 7 is arranged in the setting groove of the main body; wherein the bearing of the motor unit protrudes from the outer wall of the lower edge of the casing and fits with the inner wall of the setting groove of the main body . The motor driving device according to claim 8, further comprising an actuating element disposed in the body and drivingly connected to the motor unit. The motor drive device of claim 9, wherein the motor drive device is an anti-lock braking device, and the actuating element is an oil return pump.

Images