CN220985442U - Motor and actuating mechanism comprising same - Google Patents

Abstract

The utility model relates to an electric machine comprising: the motor comprises a motor body, a motor cover and a motor cover, wherein the motor body comprises a shell, an end cover and a printed circuit board, the end cover is connected to the shell to limit a motor cavity, and the printed circuit board is arranged in the motor cavity; and a harness connection device including a base fixedly held in the accommodation space between the end cover and the printed circuit board, and a plurality of harnesses penetrating the base, a first end of each harness being electrically connected to the printed circuit board, a second end of each harness opposite to the first end being intended to be electrically connected to a joint of the motor controller, the plurality of harnesses being bendable in a direction deviated from an axial direction of the motor to allow the motor controller to be laterally arranged with respect to the motor body by means of the bending portion. The utility model also relates to an actuating mechanism comprising the motor. According to the motor, the structure is more compact, the arrangement and installation space is greatly saved, and the connecting structure has more flexibility.

Description

Motor and actuating mechanism comprising same

Technical Field

The utility model relates to the technical field of motors, in particular to a motor and an actuating mechanism comprising the motor.

Background

Electric motors are often used extensively in various actuators to provide the power required to perform a corresponding function, the basic principle of which is to convert electrical energy into mechanical energy using the principle of electromagnetic induction. In existing motor designs, to achieve connection of the motor to the respective controller, one end of the motor is provided with an electrical interface, which typically includes a plastic connector and pins, one end of which is conductively connected to pin holes on a printed circuit board, and the other end of which is connected to a controller connector (typically the female end of the customer). Due to this connection of the pins, the overall axial height of the resulting assembly is high when the motor and the controller are connected to each other, which is very disadvantageous for application scenarios in which the layout space is limited.

Disclosure of utility model

The present utility model has been made in view of the above-mentioned background, and an object thereof is to propose an improved motor structure so that it can overcome the above-mentioned or other drawbacks of the prior art with an improved electrical interface.

According to a first aspect of the present utility model, there is provided an electric machine comprising: the motor comprises a motor body, a motor cover and a motor cover, wherein the motor body comprises a shell, an end cover and a printed circuit board, the end cover is connected with the shell to limit a motor cavity, and the printed circuit board is arranged in the motor cavity; and a harness connection device including a base and a plurality of harnesses passing through the base, wherein the base is fixedly held in a receiving space between the end cover and the printed circuit board, a first end of each harness is electrically connected to the printed circuit board, a second end of each harness opposite to the first end is intended to be electrically connected to a joint of a motor controller, and the plurality of harnesses are bendable in a direction deviated from an axial direction of the motor to allow the motor controller to be laterally arranged with respect to the motor body by means of bent portions of the plurality of harnesses.

Advantageously, an annular groove is provided in the base, the sealing ring being held with a preload between the annular groove and a corresponding receptacle of the end cap, so that the motor chamber is sealed from the outside environment.

Advantageously, the end cap is provided with an opening, the harness connection means comprising an annular wall extending from the first surface of the base away from the base and projecting from the opening, the annular wall defining a chamber in a circumferential direction through which the plurality of harnesses extend.

Advantageously, the bottom wall of the chamber is formed as part of the base and is provided with a plurality of first through holes spaced apart from each other, the printed circuit board is provided with a plurality of second through holes spaced apart from each other, the plurality of wire harnesses are threaded into the plurality of first through holes in a one-to-one correspondence such that first ends of the wire harnesses protrude from the first through holes to be aligned with the respective second through holes and electrically connected to each other.

Advantageously, a fixing glue is poured inside said chamber.

Advantageously, the second through-hole is designed as a tin-plated hole, into which the first end of the wire harness is soldered.

Advantageously, the harness connection device further comprises a limit rib extending away from the base from a second surface of the base opposite the first surface and abutting against a surface of the printed circuit board.

Advantageously, the limit rib comprises at least one first limit rib extending in a first direction and at least one second limit rib extending in a second direction perpendicular to the first direction, the second limit rib intersecting the first limit rib, a plurality of mutually separated areas being defined by the first limit rib and the second limit rib, each area defining at least one first through hole.

Advantageously, the printed circuit board is provided with a sensor, the plurality of wiring harnesses including a motor harness for power and ground of the motor and a sensor harness for power, ground and signal transmission of the sensor.

According to a second aspect of the utility model, an actuator is proposed, comprising a motor as described above.

Compared with the prior art, the motor provided by the utility model has at least one of the following technical effects: the plurality of wire harnesses included in the wire harness connecting device of the motor can be bent in a direction deviated from the axial direction of the motor, so that the motor controller can be laterally arranged with respect to the motor main body by means of the bent portions of the plurality of wire harnesses, greatly saving the axial installation height of the entire assembly; this electrical connection is more flexible because the deformability and length of the harness are adjustable, which allows matching the corresponding connectors according to the needs of the customer.

Drawings

The above and other features and advantages of the present utility model will become more readily appreciated from the following description with reference to the accompanying drawings, in which:

Fig. 1a and 1b show a prior art motor structure in perspective and top view, respectively;

Fig. 2a and 2b show a wire harness connection device according to the present utility model in perspective views at different angles, respectively;

fig. 3 shows an assembly of the wire harness connection device according to the present utility model with a joint of a motor body and a motor controller in a perspective view;

FIG. 4 shows a cross-sectional view of the assembly of FIG. 3 taken in a longitudinal direction; and

Fig. 5 shows a cross-sectional view of the assembly of fig. 3 taken in a transverse direction, showing a printed circuit board disposed within the motor cavity.

All the figures are schematic and not necessarily to scale, and they show only those parts which are necessary in order to elucidate the utility model, the other parts being omitted or merely mentioned. That is, the present utility model may include other components in addition to those shown in the drawings.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model to those skilled in the art. It will be apparent, however, to one skilled in the art that the present utility model may be practiced without some of these specific details. The various aspects, features, embodiments and advantages below are for illustration only and should not be considered as elements or limitations of the claims unless explicitly set forth in the claims. Terms such as "first," "second," and the like are used hereinafter to describe elements of the present utility model, and these terms are used solely to distinguish between the individual elements and are not intended to limit the nature, sequence, order, or number of such elements. In addition, it should be noted that in the present specification, the same and/or functionally identical technical features are provided with the same or similar reference signs.

As mentioned in the background, in prior art motor designs, in order to achieve a connection of the motor to the motor controller, one end of the motor is provided with an electrical interface 10', which electrical interface 10' typically comprises a pin 11 'and a plastic connector 12'. As shown in fig. 1a and 1b, the pins 11' extend in a vertical direction, and have one end inserted into corresponding slots in the printed circuit board and the other end protruding out of the motor end cap to connect with the female end connector of the customer. As shown in fig. 1a, the plastic connector 12' protrudes in the axial direction through the opening of the motor end cap. If the female end connector of the customer is electrically connected to the motor by the pin, the axial height of the overall structure will be high. This is very disadvantageous for application to motorcycles which are compact in construction.

To this end, the utility model proposes an improved solution which makes it possible to save as much space as possible for the axial installation of the motor assembly and which also enables flexible adaptation to the respective connectors according to the customer requirements.

Specifically, the present utility model proposes a wire harness connecting device 10 that is advantageously applied to the motor 1. Of course, the harness connection device 10 may be used in other situations where it is desirable to make an electrical connection between two components. Hereinafter, the present utility model will specifically explain a specific structure of a motor and a wire harness connecting device applied in the motor, taking the motor application as an example.

With reference to fig. 3, an assembly comprising an electric motor is shown, which, thanks to its small axial height, can be used in particular in clutch shift actuators, for example in motorcycles. The assembly comprises a motor 1 and a joint 2, the joint 2 being connected to a motor controller. The motor 1 comprises a motor body 20, said motor body 20 comprising a housing 21, an end cap 22 and a printed circuit board 23 (see fig. 4), wherein the end cap 22 is connected to the housing 21 to jointly define a motor cavity, the printed circuit board 23 being enclosed within the motor cavity by said end cap 22.

Unlike the electrical interface 10' of the prior art, the present utility model employs a wire harness connection device 10 to electrically connect the motor to the controller, wherein the wire harness connection device 10 may include a plurality of wire harnesses 11 (e.g., flexible wire harnesses having good deformability), each of the wire harnesses 11 having a first end 11a for electrical connection with the printed circuit board 23 and a second end 11b opposite the first end 11a for electrical connection with the connector 2, thereby electrically connecting the motor 1 to the motor controller (or female end of the customer, not specifically shown).

As shown in fig. 3, the plurality of wire harnesses 11 included in the wire harness connection device 10 can be bent in a direction deviated from the axial direction of the motor 1, so that the motor controller can be laterally arranged with respect to the motor main body 20 by means of the bent portions of the plurality of wire harnesses 11. It is apparent that with such a harness connection device 10, the axial installation height of the whole assembly can be greatly saved, and in addition, since the deformability and length of the harness 11 are adjustable, this allows matching the corresponding connectors according to the needs of the customer, and thus, such an electrical connection manner employing the harness connection device 10 is more flexible and requires less space for arrangement, which is advantageous for applications in a limited space scenario (e.g., motorcycle construction).

Next, a specific structure of the wire harness connecting apparatus 10 of the present utility model will be described in detail with reference to fig. 2a and 2 b. As shown in fig. 2a and 2b, the wire harness connection device 10 includes a base 12 and a plurality of wire harnesses 11 inserted through the base 12. Specifically, the base 12 is provided with a plurality of first through holes (not specifically shown in the drawings) spaced apart from each other, and the plurality of wire harnesses 11 can be inserted into the plurality of first through holes in a one-to-one correspondence, and each wire harness 11 includes a first end 11a protruding from the corresponding first through hole and a second end 11b opposite to the first end.

Referring particularly to fig. 2b, the base 12 includes an annular wall 121 extending away from the base 12 from a first surface of the base 12 (corresponding to a surface remote from the printed circuit board 23), the annular wall 121 defining a chamber in a circumferential direction, the plurality of first through holes being provided on a bottom wall of the chamber, the bottom wall being formed as part of the base 12 such that the plurality of wire harnesses 11 extend through the chamber via the plurality of first through holes.

Advantageously, a fixing glue is poured into the chamber so that the plurality of wire harnesses 11 are fixedly held within the chamber along part of their length. It will be appreciated that, due to the long length and flexibility of the harness 11, the harness is extremely prone to rattle without any fixing measures being applied, which easily results in loosening or disengagement of the electrical connection points when the harness has been connected, e.g. soldered, to the printed circuit board of the motor, resulting in failure of the motor. However, by pouring the fixing glue in the chamber shown in fig. 2b, it is possible to keep at least a part of the length of the wire harness located in the chamber fixed, and thus not follow the movement due to bending or deformation of the free end (i.e., the second end 11 b) of the wire harness, thereby effectively avoiding loosening of the electrical connection point and improving stability and reliability of the product.

In applying the wire harness connection device to the field of motors, for example, using the wire harness connection device as an electrical interface for a motor to connect a motor body with a motor controller, in order to determine the length of a wire harness protruding from a first through hole of the base 12 for connection with a printed circuit board, the base 12 further includes a stopper rib or a stopper rib 122 protruding from a second surface of the base 12 opposite to the first surface (corresponding to a surface facing the printed circuit board) away from the base 12 (i.e., in a direction toward the printed circuit board 23 of the motor), which serves as an axial stopper structure of the wire harness connection device in a motor cavity. Since this stopper rib will directly abut on the surface of the printed circuit board 23 when the harness connecting device is assembled in the motor main body (see fig. 4), the protruding length of the stopper rib 122 will determine the protruding length of the harness 11 from the first through hole.

As a specific example, as shown in fig. 2a and 5, the limiting rib 122 includes a first limiting rib 122a extending in a first direction and three second limiting ribs 122b extending in a second direction perpendicular to the first direction, the second limiting ribs intersecting the first limiting ribs, eight areas separated from each other being defined by the first and second limiting ribs, each area defining a first through hole. Of course, other numbers of stop ribs and corresponding numbers of discrete areas and first through holes are possible depending on the particular structural arrangement.

For example, in an embodiment of the present utility model, the sensors are provided on the printed circuit board 23, and thus the plurality of wire harnesses may include a motor wire harness for power and ground of the motor and a sensor wire harness for power, ground and signal transmission of the sensors. For example, as shown in fig. 2a and 2b, the motor harness includes three wires for powering three phase (U, V, W) windings of the motor and one wire for grounding the motor. The sensor harness includes two wires for powering the sensor, one wire for grounding the sensor, and one wire for the output signal of the sensor. Thus, a total of eight harnesses are provided (as shown in fig. 2 b). With the first and second spacing ribs 122a, 122b described above, each wire harness will extend a corresponding length from the first through hole.

Subsequently, the first end 11a of the wire harness protruding from the first through hole may be electrically connected, for example by soldering, to a corresponding tin plated hole on the printed circuit board 23 as a second through hole, while the second end 11b of the wire harness opposite to the first end is intended to be electrically connected to the socket of the joint 2. The motor controller aims to power the motor via the connector 2 and is able to determine the rotational position of the rotor etc. based on the output signals of the sensors on the printed circuit board 23.

Advantageously, to avoid derailing of the wiring harnesses 11, the motor harness acts as a first set of harnesses and the sensor harness acts as a second set of harnesses, each of which may be bound by an insulated binding band 111 or sleeve.

With continued reference to fig. 4, a schematic cross-sectional view is shown in a state in which the wire harness connection device 10 is assembled in the motor main body 20 and connected to the motor main body 20 and the joint 2. An accommodation space is defined between the end cap 22 and the printed circuit board 23 of the motor 1 for partially receiving the base 12 of the wire harness connection device, in particular the wire harness connection device 10, an annular groove 123 being provided on the base 12 around the annular wall 121 (see fig. 2 b); wherein a sealing ring 30, such as an O-ring, is abutted with a pre-tension between the annular groove 123 and a corresponding receiving portion of the end cap 22 to seal the motor cavity from the external environment. The end cap 22 is provided with an opening so that the annular wall 121 of the harness connecting device 10 and the harness enclosed in the annular wall 121 can be projected from the opening to be connected with the joint 2.

The wire harness connecting device can allow an electric connection assembly (such as a motor assembly) to be more compact, greatly saves arrangement and installation space, and solves the problem of space arrangement constraint; the flexible and length-adjustable wire harness is used for replacing the rigid contact pin commonly used in the prior art, so that the connecting structure is more flexible, and therefore, different connectors or joints can be more adapted or matched.

It should be noted that the above-described embodiments should be regarded as illustrative only, and the present utility model is not limited to these embodiments. Many changes and modifications may be made by one skilled in the art without departing from the scope or spirit of the utility model, by considering the contents of this specification. The true scope of the utility model is defined by the following claims and their equivalents.

Claims (10)

1. An electric machine, characterized in that the electric machine (1) comprises:

A motor body (20) comprising a housing (21), an end cap (22) connected to the housing to define a motor cavity, and a printed circuit board (23) disposed within the motor cavity; and

A wire harness connection device (10) comprising a base (12) and a plurality of wire harnesses (11) passing through the base, wherein the base (12) is fixedly held within a receiving space between the end cap (22) and the printed circuit board (23), a first end (11 a) of each wire harness is electrically connected with the printed circuit board (23), a second end (11 b) of each wire harness opposite to the first end is intended to be electrically connected with a joint (2) of a motor controller, the plurality of wire harnesses being bendable in a direction deviating from an axial direction of the motor to allow the motor controller to be laterally arranged with respect to the motor body (20) by means of bent portions of the plurality of wire harnesses (11).

2. An electric motor according to claim 1, characterized in that an annular groove (123) is provided in the base (12), and that a sealing ring (30) is abutted with a pre-tightening force between the annular groove (123) and a corresponding receiving portion of the end cap (22) for sealing the motor cavity from the external environment.

3. The electric machine according to claim 1, wherein the end cap (22) is provided with an opening, the wire harness connection means (10) comprising an annular wall (121) extending from the first surface of the base away from the base and protruding from the opening, the annular wall defining a chamber in a circumferential direction, the plurality of wire harnesses extending through the chamber.

4. A machine according to claim 3, characterized in that the bottom wall of the chamber is formed as part of the base (12) and is provided with a plurality of first through holes spaced apart from each other, the printed circuit board (23) is provided with a plurality of second through holes spaced apart from each other, the plurality of wire harnesses being threaded in the plurality of first through holes in a one-to-one correspondence such that first ends (11 a) of the wire harnesses protrude from the first through holes to be aligned with the respective second through holes and electrically connected to each other.

5. A motor as claimed in claim 3, wherein a fixing glue is poured into the chamber.

6. The electric machine according to claim 4, characterized in that the second through hole is designed as a tin plated hole, within which the first end (11 a) of the wire harness is soldered.

7. The electric machine according to claim 4, characterized in that the harness connection device (10) further comprises a limit rib (122) extending away from the base from a second surface of the base (12) opposite the first surface and abutting against a surface of the printed circuit board (23).

8. The electric machine of claim 7, wherein the spacing ribs include at least one first spacing rib (122 a) extending in a first direction and at least one second spacing rib (122 b) extending in a second direction perpendicular to the first direction, the second spacing rib intersecting the first spacing rib, a plurality of mutually separated regions defined by the first and second spacing ribs, each region defining at least one first through hole.

9. The electric machine according to any one of claims 1 to 8, characterized in that the printed circuit board (23) is provided with sensors, the plurality of wire harnesses comprising a motor wire harness for power and ground of the electric machine and a sensor wire harness for power, ground and signal transmission of the sensors.

10. Actuator, characterized in that it comprises an electric motor (1) according to any one of claims 1 to 9.