JP6620421B2 - Drip-proof structure of electric motor and its control device, and electric power steering device, actuator and vehicle using the same - Google Patents

Description

  The present invention relates to a drip-proof structure between an electric motor and its control device, and more specifically, a drip-proof portion is provided in a part of a casing of the control device, and the drip-proof portion is provided in the control device and / or the The present invention relates to a drip-proof structure that drip-proofs the electric motor and its control device by extending it beyond the outer edge of the portion of the electric motor that is desired to be drip-proof and providing a so-called umbrella.

  2. Description of the Related Art Conventionally, for example, in-vehicle electronic devices mounted on a vehicle, there has been a demand for weight reduction and compactness of the entire device in order to effectively use a limited space of the vehicle. For this reason, in-vehicle electric motors and their control devices are also required to be lighter and more compact as in-vehicle electronic devices.

  In addition, when the on-vehicle electric motor and its control device are arranged apart from each other in the vehicle, it is necessary to connect them with a bus bar terminal or the like. In addition, there are effects such as an increase in radio noise through the wiring and an increase in the number of parts.

  Therefore, from this point of view, in order to further reduce the weight and size in consideration of the influence of the radio noise and the like and the reduction of power consumption, the electric actuator that is an in-vehicle electronic device and the in-vehicle electric In many cases, the motor and its control device are integrated.

  The vehicle-mounted electric motor and its control device integrated in this way are mounted in the vehicle, but depending on the position and orientation of the mounted on-vehicle electric motor, It is necessary to adopt a waterproof or drip-proof structure depending on the equipment (air conditioner, etc.) and the external environment.

  Therefore, as an example of such a waterproof structure, for example, a technique described in Japanese Patent Laid-Open No. 2000-166161 (Patent Document 1) is disclosed.

  The technology disclosed in Patent Document 1 relates to a motor-integrated electronic control device in which a motor is housed in a lower part of a case that can be divided vertically and has waterproof properties, and a motor control device is housed in an upper part. . And in the motor integrated electronic control apparatus described in the said patent document 1, the structure which uses the mating surface of the said upper part and the said lower part as a drip-proof surface is employ | adopted.

JP 2000-166161 A

  However, in the invention described in Patent Document 1, in order to perform drip-proofing and waterproofing between the upper part of the case in which the electronic control device is housed and the lower part of the case in which the motor is housed, It is necessary to secure a mating surface that seals these as the drop surface. Therefore, since it is necessary to form the mating surface (drip-proof surface), there arises a problem that an upper part or a lower part of the case (housing) is increased in size or complicated in shape.

  In addition, for example, in an electric power steering device of an automobile, a strict waterproof structure is not required, and fluid from an air duct or the like disposed above the steering system is not necessary due to the arrangement when incorporated in a vehicle. In some cases, only a drip-proof structure that avoids dripping is required. Therefore, in such a case, there is a demand for a structure or component that can be splash-proofed more simply and at low cost without providing a separate drip-proof cover or the like.

  Therefore, the present invention has an object to solve the above-described problems or requests, and it is desired to prevent a part of the cover constituting the casing of the control device from drip-proofing the control device and / or the electric motor. Extending beyond the part, so to speak, the cover of the control device is configured to function like an umbrella, thereby achieving drip-proofing of the electric motor and its control device easily and at low cost.

In order to solve the above-described problems, the present invention provides an electric motor and a control device connected to each other at one connection surface of a mutual housing, and a part of the housing of the control device is the control device and / or the A drip-proof structure of an electric motor provided with a drip-proof portion configured to extend beyond the outer edge of a portion to be drip-proof of the electric motor and its control device, and the control device of the casing of the electric motor The connection surface is provided on the side opposite to the output end side of the drive shaft of the electric motor in the housing of the electric motor, and the conductive terminal from the electric motor protrudes from the connection surface of the electric motor, Connected to a control terminal from the control device provided in the housing of the control device, the drip-proof portion from the connection surface of the housing of the control device and the connection surface of the housing of the electric motor, Prevention of the electric motor on the side surface of the casing of the electric motor The drip-proof portion is provided so as not to cause capillary action between the portion to be drip-proof and the drip-proof portion and the portion to be drip-proof. The interval is configured so that all or a part of the interval extends toward the end of the drip-proof portion, and the drip-proof portion is fixed to the control device or the electric motor by caulking or screwing. In the inner surface of the drip-proof part, a region where a plurality of concave and convex parts are continuously formed is formed in a part of the connection portion with the control device or the electric motor, and the drip-proof part is Provided is a drip-proof structure of an electric motor and its control device , which is performed by press-fitting the control device or the electric motor .

Further, the solution to the above problem is that the plurality of uneven portions are formed so as to extend from a base end portion of the drip-proof portion in a direction opposite to a side where the drip-proof portion extends, and the base end portion It is possible to form a functional body at a position along the terminal side of the drip-proof portion by being provided away from the drip-proof portion, and the functional body can temporarily hold the dripping fluid. A function body is formed in a portion along the terminal side of the drip-proof portion, or the function body is configured to supply a fluid to be dropped. By providing a guiding groove for guiding, or at the end of the drip-proof part, the end is arranged inside the drip-proof part so that the cross-section of the end of the drip-proof part is smooth. Or the end of the drip-proof part is protected by resin. In by being coated, or the electric power steering apparatus using the drip-proof structure of the electric motor and its control device, or an electric actuator, or by using the vehicle is more effectively achieved.

  According to the drip-proof structure of the electric motor and its control device of the present invention, the electric motor and its control device can be waterproof or drip-proof without having a mating surface of the connecting portions of these mutual connections. is there. Then, a part of the casing of the control device is stretched until it exceeds the outer edge of the electric motor and / or the portion of the control device that is desired to be drip-proof, so that a drip-proof portion is formed, which functions like an umbrella. Therefore, a fluid such as dripped water does not come into contact with or stay in the portion to be drip-proof, and the drip-proof portion has an appropriate distance from the portion to be drip-proof so that capillary action does not occur. Therefore, the fluid such as water can be guided downward without being sucked between the electric motor and the drip-proof portion due to a capillary phenomenon.

  Furthermore, in the present invention, it is also possible to form a plurality of concavities and convexities on the inner surface on the side opposite to the direction in which the drip-proof portion extends, and press-fit and fix to the outer surface of the control device or electric motor. Therefore, it is possible to firmly fix the drip-proof structure to the outer surface of the control device or the electric motor.

  Therefore, it is possible to achieve drip-proofing with respect to the fluid to be dropped, which is necessary for the electric motor and its control device, simply and at low cost.

It is the figure which showed the general structure of the electric power steering apparatus. The electric motor which has the drip-proof structure of this invention, and its control apparatus are shown from the side, (A) is a housing | casing side view of a control apparatus, (B) is a side view of an electric motor, (C) is It is a side view which shows the state which combined these. It is the perspective view which looked at the electric motor which has a drip-proof structure of the present invention, and its control device from the connector side near the control device. It is the perspective view which showed the structural example of the electric motor which does not have the drip-proof structure of this invention, and its control apparatus, (A) is a control apparatus, (B) is a control apparatus mounting flange, (C) is control apparatus installation. It is a perspective view of the state which combined the flange and the electric motor. It is the side view which showed the example of a connection of the electric motor which does not have the drip-proof structure of this invention, and its control apparatus. (A) is the perspective view which looked at the example of the edge structure of the edge part of a drip-proof part from the insertion hole side of the connector terminal of a control apparatus, (B), (C) is the cross section in an XX line It is sectional drawing which shows an example. It is the perspective view which looked at the structural example for attaching the cover of the housing | casing of the control apparatus which provided the drip-proof part to the other part etc. of the control apparatus from the electric motor side. It is the side view which illustrated the image of the drip-proof by this invention, (A) showed the example when the rotating shaft of a motor inclines in the connector direction, (B) is the rotating shaft of a motor. This is an example in the case of inclining in a direction perpendicular to the direction of the connector and the direction in which the connector is inserted. FIG. 9 illustrates an example in which the drip-proof portion is configured to extend the distance from the end of the motor housing with reference to the example of FIG. 8. (A) is the figure which showed the structural example for attaching the cover of the housing | casing of the control apparatus which provided the drip-proof part to the other part etc. of a control apparatus from the electric motor attachment side (heat sink side), (B) Is an enlarged view of the area indicated by A in FIG. (A), and (C) is an enlarged view of the area indicated by B in FIG. (A) is the perspective view which looked at the cover from the outer upper part, (B) is the perspective view which expanded the area | region of A shown to the said figure (A), (C) is the said figure (A). It is the perspective view which expanded the area | region of B shown in (4), (D) is the perspective view which looked at the cover shown in the said figure (A) from the outer lower part.

  Embodiments of the present invention will be described below by taking as an example the case where the drip-proof structure of the electric motor of the present invention and its control device is used in an electric power steering device used in a vehicle, which is a kind of actuator. .

  Here, the electric power steering device applies steering assist force (assist force) to the steering mechanism of the vehicle by the rotational force of the electric motor, and the driving force of the motor is applied to a gear or belt via a speed reduction mechanism. A steering assist force is applied to the steering shaft or the rack shaft by the transmission mechanism. Such an electric power steering device (EPS) performs feedback control of the motor current in order to accurately generate the torque of the steering assist force.

  Such feedback control adjusts the electric motor applied voltage so that the difference between the steering assist command value (current command value) and the electric motor current detection value is small. This is done by adjusting the duty of PWM (pulse width modulation) control.

  The general configuration of the electric power steering apparatus described above will be described with reference to FIG. 5, via tie rods 6A and 6B, and further connected to steered wheels 8L and 8R via hub units 7A and 7B. Further, the column shaft 2 is provided with a torque sensor 10 for detecting the steering torque of the handle 1 and a steering angle sensor 14 for detecting the steering angle θ, and the motor 200 for assisting the steering force of the handle 1 is provided with the speed reduction mechanism 3. Are connected to the column shaft 2 via a reduction gear (gear ratio n).

  A control unit (ECU), which is a control device 300 that controls the electric power steering device described above, is configured with a micro control unit (MCU) as a basic component, and is supplied with power from the battery 13 and also has an ignition key 11 pressed. Then, an ignition key signal is input.

  In the control device 300 configured as described above, the current command value of the assist (steering assist) command is calculated based on the steering torque Th detected by the torque sensor 10 and the vehicle speed Vel detected by the vehicle speed sensor 12, The current supplied to the electric motor 200 is controlled by a voltage control command value Vref obtained by compensating the current command value. The steering angle sensor 14 is not essential and may not be provided, and the steering angle can be obtained from a rotational position sensor such as a resolver connected to an electric motor.

  The control device 300 is connected to a CAN (Controller Area Network) 50 that exchanges various vehicle information, and the vehicle speed Vel can be received from the CAN 50. The control device 300 is also connected to a non-CAN 51 that exchanges communications other than the CAN 50, analog / digital signals, radio waves, and the like.

  And in the electric power steering apparatus which is embodiment of this invention comprised as mentioned above, the drip-proof structure of the electric motor 200 of this invention and its control apparatus 300 is comprised as follows. Note that, in the following description, the same constituent elements that may take other forms are denoted by the same symbols, and overlapping descriptions and configurations may be partially omitted.

FIG. 2 shows the entire structure of the electric motor 200 having the drip-proof structure of the present invention and its control device 300 from the side. 2A is a side view of the cover 330 constituting the casing of the control device 300, FIG. 2B is a side view of the electric motor 200, and FIG. 2C is a combination of these. It is a side view. FIG. 3 is a perspective view of the drip-proof structure between the electric motor 200 and its control device 300 shown in FIG. 2C as viewed from the insertion port of the control device 300 into the connector terminal 310. (Note that the resolver cable 400 is also displayed in a part of FIGS. 2 and 3.)
As shown in FIG. 2 (A), a drip-proof portion 350 extending in the right direction and the downward direction in FIG. 2 (A) is provided on a part of the cover 330 constituting the casing of the control device 300. Further, the connector 310 portion of the control device as shown in FIG. 3 which is a portion to be drip-proof is the same as the extending portion 350 in the right direction shown in FIG. The mounting flange 100 portion of the electric motor 200 is covered from the outside by the downward extending portion 350 shown in FIG.

  Then, as shown in FIG. 2C, the control device 300 having the cover 330 of FIG. 2A is connected to the electric motor 200 of FIG. The lower end of the drip-proof part 350 configured on the lower side of the cover 330 of the control device 300 shown is a conductive terminal (Mu, Mv, Mw) of the electric motor 200 and a control terminal (not shown) from the control device 300. The lower end of the controller mounting flange 100 on the lower side (the electric motor output side on the lower side of the drawing) of the joint surface (the portion indicated by the alternate long and short dash line in FIG. 2B to FIG. 2C) It is configured to be positioned below the portion of the chain line shown from FIG. 2 (B) to FIG. 2 (C). Similarly, as shown in FIG. 3, the connector 310 portion of the control device 300 is covered except for the lower side by a drip-proof portion 350 extending rightward from the cover 330, as shown in FIG. Configured as follows.

  Next, a drip-proof structure between the electric motor 200 and its control device 300 as described above will be described in comparison with an example of a mounting structure between the electric motor and the control device when the drip-proof structure is not provided.

  FIG. 4 illustrates an example of the mounting structure described in Japanese Patent Application No. 2014-177239 by the present applicant. As shown here, the electric motor 200 and its control device 300 are connected to the control device 300 via the control device mounting flange 100 on the end surface 270 opposite to the output side 250 of the electric motor 200. . That is, conductive terminals (Mu, Mv, Mw) from the electric motor 200 project from the connection surface 270 of the electric motor 200, and the conductive terminal 200 is provided on the controller mounting flange 100. The relay terminal 150 is connected, and a control terminal (not shown) formed on the connection surface 370 side of the control device 300 is further connected to the relay terminal 150, whereby the electric motor 200 and the control device 300 are electrically connected. In addition, the control device 300 is mechanically fixed more firmly by being connected to the mounting boss setting portion 131 of the control device mounting flange 100 by the connecting part corresponding portion 350 of the control device 300. Has been. FIG. 5 is a view of the example of the mounting structure described in FIG. 4 as seen from the side in another direction so that the connector 310 portion of the control device 300 can be easily understood.

  An example of the mounting structure of the electric motor 200 and its control device 300 when it does not have the drip-proof structure shown in FIG. 5, and the electric motor 200 having the drip-proof structure of the present invention shown in FIG. As can be seen by comparing the example of the mounting structure with the control device 300, in the present invention, in order to prevent the connector 310 portion and the control device mounting flange 100 portion as shown in FIG. As shown in FIGS. 2 to 3, a drip-proof portion 350 is provided in which a part of a cover 330 configured as a part of a casing of a control device is extended to the connector 310 portion and the control device mounting flange 100 portion. ing.

  Therefore, by adopting the structure as in the present invention, the cover 330 of the housing of the present invention is formed like an umbrella so as to cover the respective portions to be drip-proof. Since there is no contact with the fluid, effective drip-proofing can be achieved.

  In addition, if the housing | casing of the said control apparatus 300 is a structure connected with the housing | casing of the electric motor 200 by one connection surface, there will be no limitation in particular about a specific connection structure or form, and the external shape 4 is not limited to the cylindrical shape as a basic shape as shown in FIG. 4, but may be a box shape based on a quadrilateral shape. Further, the cover 330 constituting a part of the casing of the control device 300 can be formed of a metal steel plate, a resin, a composite material, or the like.

  In addition, the drip-proof portion 350 of the present invention is formed at a distance from the portion where the drip-proof is desired to prevent capillary action. Therefore, by adopting such a configuration, in the present invention, it is possible to prevent the intrusion of fluid between the drip-proof portion 350 and the portion to be drip-proof due to capillary action.

  Further, since the end portion of the drip-proof portion 350 is a shearing surface, the end portion of the drip-proof portion 350 is taken into consideration for safety in handling and assembly, and for smoothly guiding the dropped liquid downward. It is desirable that the cross section is formed of a curved surface such as a circular shape.

  Therefore, for example, as shown in FIG. 6 (A) in a perspective view of the connector 310 portion of the control device provided with the drip-proof portion 350 of the present invention as seen from the connector insertion direction, FIG. 6 (A). The cross section on the XX line is a shape in which the drip-proof portion 350 is folded inward as shown in FIG. 5B, or the end cross-section of the drip-proof portion 350 as shown in FIG. It can be configured in a circular shape. Alternatively, it is possible to employ a structure in which the end of the drip-proof part 350 is coated with a protective material made of resin.

  Further, the cover 330 of the casing of the control device 300 of the present invention that includes the drip-proof part 350 as a part thereof is, for example, caulked to the inside of the casing cover that includes the drip-proof part 350 as shown in FIG. By providing the screwing portion 380, it can be fixed to the control device or the electric motor.

That is, FIG. 7 is a perspective view of the electric motor 200 provided with the drip-proof part 350 of the present invention and the control device 300 as viewed from the output end side 250 of the electric motor. (Here, the control device 300 has a generally box-like shape in which the connector 310 portion protrudes laterally with respect to the drive shaft MC of the electric motor 200.)
Therefore, in the embodiment of the present invention, as shown in FIG. 7 above, the vicinity of the connecting portion 380A between the drip-proof portion 350 around the connector 310 and the drip-proof portion 350 around the electric motor 200, and an appropriate distance from it. Further, a protrusion or screwing portion (380A, 380B) for caulking is provided at an arbitrary position 380B on the end portion of the drip-proof portion 350 around the electric motor toward the inner side of the drip-proof portion. ing.

  Further, the drip-proof portion 350 is provided by connecting the protrusions or screwing portions (380A, 380B) for crimping to other parts of the casing of the control device or the control device mounting flange or the like. Further, the cover 330 of the control device can be fixed to the other part of the casing of the control device 300 or the control device mounting flange 100 or the like. Therefore, in the present invention, the above-described fixing makes it possible to stably maintain the cover 330 portion of the control device against the fluid to be dropped.

  In the above fixing, it is possible to use a protrusion formed in advance on the outside of the casing of the control device 300 to the electric motor 200 or the like, or a protrusion for the caulking stop. Or an engaging portion corresponding to the screwing portion is formed outside the casing of the control device 300 to the electric motor 200 (for example, in the form of a protrusion with the height of the casing partially raised). Also good. This is because the drip-proof part 350 of the cover of the control device of the present invention can be devised freely within the scope of the present invention, depending on the direction in which the fluid is expected to drop and the part to be drip-proof. In accordance with this, the means for fixing and the configuration of the part are considered so that no fluid flows into the inside of the drip-proof part from the protrusion or screwing part for the caulking. This is because it can be freely selected.

  In the above embodiment of the present invention, a connector 310 portion provided on the side surface of the control device 300 or a control device mounting flange 100 portion attached to the electric motor 200 is assumed as a portion to be drip-proof. However, the selection of the portion to be drip-proof is not limited to these, and there is no particular limitation as long as the portion can be covered with the cover 330 of the housing of the control device 300.

  According to the present invention having the above-described configuration, for example, as shown in the image of drip-proofing according to the present invention in FIG. 8, the fluid dripping from the top (shown by the bold arrows in the figure) is prevented. It is possible to achieve effective drip-proofing by avoiding the portion to be dropped and guiding it downward. That is, as in the case described in FIG. 8A, the direction in which the control device 300 and the electric motor 200 see the connector 310 of the control device 300 from the drive shaft MC of the electric motor is downward. Or the control device 300 and the electric motor 200 connect the connector 310 of the control device from the drive shaft MC of the electric motor as in the case described in FIG. 8B. When tilted in the vertical direction from the viewed direction, as shown by the bold arrows in FIGS. 8 (A) and 8 (B), the fluid to be dropped, such as water droplets, is the housing of the present invention. It is guided along the outside of the drip-proof part 350 of the body, so that it does not enter the part to be drip-proof. Therefore, effective drip-proofing is possible by the drip-proof unit 350 that constitutes a part of the cover 330 of the control device 300.

  Moreover, the drip-proof structure of the electric motor of the present invention and its control device is not limited to the above embodiment, and can be implemented in various forms within the scope of the present invention.

  Therefore, for example, the casing of the control device can use a material having excellent heat transfer properties. In that case, the drip-proof portion is further used as a heat dissipation medium for the control device or the electric motor. It can be used effectively.

  Moreover, in the said embodiment, the said drip-proof part is spaced apart and provided so that a capillary phenomenon may not arise from the part which wants to drip-proof. However, it is also possible to provide all or part of the drip-proof portion so as to extend the distance from the portion to be drip-proof by extending to the end side (that is, the end side in the extending direction).

  That is, the drip-proof portion 350 of the control device 300 as shown in FIGS. 8A and 8B is replaced with the cover 330 as shown in the modification shown in FIGS. 9A and 9B. It is also possible to adjust the guiding direction of the fluid to be dropped by providing an end of the drip-proof portion 350 so that the distance from the portion to be drip-proof is increased.

  Further, as shown in FIG. 9 (A), a stagnant body capable of temporarily retaining the dripping fluid in a portion 390 along the end side of the drip-proof portion is foamed such as a sponge. It is assumed that a functional body is formed by dropping a material or porous material on the casing of the control device by providing a guiding groove or the like for guiding the dropping fluid. It is also possible to effectively control the flow according to the amount of fluid.

  In addition, when fixing the cover 330 of the housing of the control device 300 of the present invention including the drip-proof portion 350 to the control device 300 or the electric motor 200, the above-described protrusions for crimping are used. It is also possible to adopt the following structure together with or in place of the screwing portions (380A, 380B).

  That is, as shown in FIG. 10A, as a method of fixing the cover 330 having the drip-proof part 350 to the control device 300 or the electric motor 200, among the inner surfaces of the cover 330 having the drip-proof part 350, A region where a plurality of concave and convex portions 380C are continuously formed is formed in at least a part of a connection portion or a connection surface with the control device 300 to the electric motor 200, and the cover 330 is attached to the control device 300 or the like using this. A method of press-fitting into the electric motor 200 can also be used.

  This will be described in more detail. FIG. 10A is a view of the control device 300 to the electric motor 200 as viewed from the electric motor rotating shaft MC side. In the drawing, the outline of the heat sink 300A that constitutes the control device in particular. Is highlighted (hatching is omitted). 10B is an enlarged view of the portion indicated by A in FIG. 10A, and FIG. 10C is an enlarged view of the portion indicated by B in FIG. 10A. FIG.

  Then, as shown in FIGS. 10A to 10C, the electric motor rotating shaft MC of the connection portion or the connection surface with the control device 300 to the electric motor 200 among the inner surfaces of the cover 330. When a region where a plurality of uneven portions 380C are continuously formed is provided on at least a part of the outer peripheral surface along the contour viewed from the side, the plurality of uneven portions 380C are formed on the inner surface of the cover 330. By pressing the continuously formed region into the heat sink 300A or the like having the above-described contour, the uneven portion 330C formed on the inner peripheral surface of the cover 330 becomes the outer peripheral surface of the heat sink 300A of the control device 300. The cover 330 can be fixed to the heat sink 300A by being pressed against the heat sink 300A.

  Further, in FIG. 11, as described above, an area in which a plurality of uneven portions 380 </ b> C are continuously formed is provided on the inner surface of the cover 330 having the drip-proof portion 350, and the cover 330 is fixed to a heat sink or the like of the control device 300. This shows another configuration example. Here, FIG. 11A is a perspective view of the cover 330 as viewed from the upper outer side, and FIG. 11B is an enlarged perspective view of the area indicated by A in FIG. 11A. 11 (C) is an enlarged perspective view of the region indicated by B in FIG. 11 (A), and FIG. 11 (D) is a perspective view of the cover 330 shown in FIG. is there. 11 shows only the base end portion of the drip-proof portion (the portion corresponding to the root of the extending portion formed in the drip-proof portion) of the cover 330. And most of the stretched portion is omitted.

  In the example of FIG. 11, as shown in FIGS. 11B and 11C, the plurality of uneven portions 380 </ b> C are fitted with the outer peripheral surface of the heat sink 300 </ b> A of the control device 300 so that the drip-proof portion 350. The base end portion of the cover 330 is formed so as to extend in the direction opposite to the side where the drip-proof portion 350 of the cover 330 extends.

  At this time, since a small gap is formed in the fitting portion between the uneven portion 380C and the heat sink 300A, the uneven portion 380C prevents the capillary phenomenon from occurring between the heat sink 300A and the like and the cover 330. It is preferable that the droplet portion 350 is formed at a position separated to some extent from the base end portion side.

  Further, in the case where a region where a plurality of concave and convex portions 380C are continuously formed is provided on the inner peripheral surface of the cover 330 as described above, the concave and convex portions 380C are provided in at least a part of the corresponding positions on the heat sink 300A. The cover 330 can be fixed by providing convex and concave portions corresponding to the concave and convex portions of the 380C and fitting them together.

  Further, instead of providing a region in which the plurality of concave and convex portions 380C are continuously formed on the inner peripheral surface of the cover 330 as described above, the connection portion with the control device 300 to the electric motor 200 or the surface on the connection surface side. It is good also as a structure which provides the above uneven parts.

  As shown in FIG. 10A, the fixing method of the cover 330 using the concavo-convex portion 380C as described above is the fixing method of the cover 330 shown in FIG. 7 (the caulking portion or the screwing portion 380A, 380B).

  As described above, when the fixing method of the cover 330 by the uneven portion 380C as described above is adopted, the caulking portion or the screwing portions 370A and 380B cannot be provided at an appropriate place, or the caulking portion Or by providing the concavo-convex portion 380C at a location where the rigidity of the cover 330 is weakened only by providing the screwing portions 370A and 380B (for example, regions indicated by A and B in FIG. 10A), It is possible to suppress the vibration and resonance of the cover 330 and improve the rigidity of a portion where an appropriate fixing point cannot be obtained and to reinforce it.

  Therefore, by adopting such a structure, the rigidity of the fitting portion between the cover 330 and the control device 300 or the electric motor 200 is increased, and resonance, abrasion, damage, etc. of the cover due to vibrations are prevented, thereby applying the present application. The drip-proof function according to the invention can be achieved more effectively.

1 Handle 2 Column shaft (steering shaft, handle shaft)
DESCRIPTION OF SYMBOLS 3 Deceleration mechanism 4A 4B Universal joint 5 Pinion rack mechanism 6A 6B Tie rod 7A 7B Hub unit 8L 8R Steering wheel 10 Torque sensor 11 Ignition key 12 Vehicle speed sensor 13 Battery 14 Steering angle sensor

200 Electric motor 250 Motor load side surface 270 Connection surface (electric motor side)

300 Control device (control unit, ECU)
300A Heat sink of control device (control unit, ECU) 310 Connector portion 330 Control device cover 350 Drip-proof portion
370 Connection surface of control device 380A 380B Caulking part 380C Concavity and convexity 390 Functional body forming part 400 Resolver cable Mu, Mv, Mw Conductive terminal from motor MC Electric motor rotating shaft

Claims (9)

The electric motor and the control device thereof are connected to each other at one connection surface of the mutual housing, and a part of the housing of the control device exceeds the outer edge of the control device and / or the portion of the electric motor that is desired to be drip-proof. It is a drip-proof structure with an electric motor provided with a drip-proof part that is stretched up to and its control device ,
The connection surface of the casing of the electric motor with the control device is provided on the opposite side of the casing of the electric motor from the output end side of the drive shaft of the electric motor. , Projecting the conductive terminal from the electric motor, connected to the control terminal from the control device provided in the housing of the control device,
The drip-proof portion extends from the connection surface of the housing of the control device and the connection surface of the housing of the electric motor to a position beyond a portion of the electric motor housing that is desired to be drip-proof on the side surface of the electric motor. Stretched ,
The drip-proof part is provided so as not to cause capillary action between the part to be drip-proof and
The interval between the drip-proof portion and the portion to be drip-proof is configured so that all or a part thereof is enlarged toward the end of the drip-proof portion,
The drip-proof portion is fixed to the control device or the electric motor by caulking or screwing, and one of the connecting portions of the drip-proof portion on the inner surface of the drip-proof portion is connected to the control device or the electric motor. A drip-proof structure of an electric motor and its control device is formed by forming a region in which a plurality of concave and convex portions are continuously formed in the portion and press-fitting the drip-proof portion into the control device or the electric motor. .   The plurality of concavo-convex portions are formed so as to extend in a direction opposite to a side where the drip-proof portion extends from a base end portion of the drip-proof portion, and are provided apart from the base end portion. Item 4. A drip-proof structure between the electric motor according to item 1 and its control device.   A functional body is formed in a portion along the terminal side of the drip-proof portion, and the functional body is provided with a stagnant body capable of temporarily retaining a dripping fluid with a foam material or a porous material. The drip-proof structure of the electric motor according to claim 1 or 2 and its control device. 3. The electric motor according to claim 1 , wherein a functional body is formed in a portion along a terminal side of the drip-proof portion, and the functional body is provided with a guide groove that guides a fluid to be dropped. And its drip-proof structure. The end portion of the drip-proof portion has a shape in which the end portion is folded back inside the drip-proof portion so that a cross section of the end portion of the drip-proof portion is smooth. A drip-proof structure between the electric motor according to item 1 and its control device. 6. The drip-proof structure of the electric motor and its control device according to claim 5, wherein an end of the drip-proof part is coated with a protective material made of resin. An electric power steering device using a drip-proof structure of the electric motor according to any one of claims 1 to 6 and its control device. The electric actuator apparatus using the drip-proof structure of the electric motor of any one of Claims 1 thru | or 6 , and its control apparatus. The vehicle using the drip-proof structure of the electric motor of any one of Claims 1 thru | or 6 , and its control apparatus.