JPH0632776Y2 - Motor with reduction mechanism - Google Patents

Description

[Detailed description of the device] [The purpose of the device]

(Industrial application field) The present invention relates to a motor with a reduction mechanism used for a wiper motor, a power window motor or a sunroof motor of an automobile. (Prior Art) Conventionally, as a motor with a speed reduction mechanism, which is a wiper motor, a power window motor or a sunroof motor of an automobile, for example, one shown in FIG. 4 is known. The illustrated motor 101 with a reduction mechanism is for a wiper motor, and includes an armature 103 in a yoke 105 of a motor unit 102.
Is rotatably housed, and the rotating shaft provided in the armature 103 in a gear case 106 connected to the yoke 105.
A deceleration mechanism 104 for decelerating the rotation of 103a is housed.
An opening portion of the gear case 106 is covered with a case cover 107, and a connector 108 that accommodates a terminal 108a for supplying a current to the armature 103 is provided on an upper surface of the case cover 107. Terminal 108
A current is supplied to a from a current supply circuit (not shown) provided outside. When the current is supplied to the armature 103, the rotating shaft 103
a rotates and the reduction mechanism 104 reduces the rotation of the rotating shaft 103a, the output shaft 109 coupled to the reduction mechanism 104 rotates, and a wiper arm (not shown) coupled to the output shaft 109 also causes a wiper arm (not shown) to rotate. Is swung on the wiping surface, the wiping surface is wiped by the wiper blade connected to the wiper arm. (Problems to be Solved by the Invention) In the motor 101 with a reduction mechanism described above, the armature 103
Current is supplied to the external power supply circuit from an externally provided current supply circuit, and in recent years the number of in-vehicle electrical devices has tended to increase.Therefore, the number of wire harnesses for connecting these electrical devices has increased, thereby increasing the Since it is unavoidable from an increase in weight and a reduction in storage space, it is desirable to avoid an increase in the number of wire harnesses by integrally forming a current supply circuit in the motor 101 with a reduction mechanism. Motor 101 with reduction mechanism
In the case where the current supply circuit is arranged between the gear case 106 and the case cover 107, it is necessary to increase the capacity of the gear case 106. Therefore, if the height dimension is increased to increase the capacity, the gear case 106 becomes large. In addition to the possibility, there is a problem that the size of the gear case 106 increases and the amount of protrusion of the connector 108 provided on the case cover 107 also increases, which may increase the outer shape. Therefore, in order to reduce the height direction in a state where the gear case 106 and the case cover 107 are assembled, a step is formed in a crank shape at the connecting portion between the gear case 106 and the case cover 107 to form the gear case 106 and the case cover 1.
Some tried to reduce the height dimension with 07,
Since an O-ring is sandwiched between the gear case 106 and the case cover 107 to prevent rainwater from entering when mounted on the vehicle, the connection between the gear case 106 and the case cover 107 has a stepped shape. If so, a large bending stress is applied to the O-ring to deteriorate the adhesiveness, resulting in a problem of poor waterproofness, and it has been a problem to solve the above problems. (Object of the Invention) A motor with a speed reduction mechanism according to the present invention provides a motor with a speed reduction mechanism that does not require an increase in size of the gear case even if a current supply circuit is integrally arranged in the gear case. Is intended.

[Constitution of device]

(Means for Solving the Problem) A motor with a reduction mechanism according to the present invention controls an armature that rotates by being supplied with an electric current, a motor unit having a yoke that accommodates the armature, and a rotation of the armature of the motor unit. A deceleration mechanism for deceleration, an opening for accommodating the deceleration mechanism, a gear case for holding the yoke of the motor section, a current supply circuit for supplying a drive current to the armature of the motor section, and an electrical connection to the current supply circuit. In a motor with a reduction mechanism that has a connector with a fixed terminal and the terminal formed integrally, covers the opening of the gear case, and has a case cover that attaches to the gear case, the current supply circuit is held by the case cover. On the connecting part of the gear case to the case cover and the gear case of the case cover. The connecting portion opposite to the connecting portion forms a single continuous connecting inclined surface that is inclined with respect to the axial direction of the rotating shaft provided in the armature of the motor unit and approaches the rotating shaft of the armature as the distance from the motor unit increases. The connector is characterized in that the connector is formed at the end of the case cover away from the motor section. (Operation of the Invention) In the motor with a reduction mechanism according to the present invention, the connector is formed at an end portion of the case cover holding the current supply circuit away from the motor portion, and the rotary shaft provided in the armature of the motor portion. The gear case and the case cover are arranged on the side where the height dimension of the gear case is small due to the single continuous connecting inclined surface that is inclined with respect to the axial direction of the armature and approaches the rotation axis of the armature as the distance from the motor part increases. It is not necessary to increase the height of the armature, and the connecting inclined surface is inclined with respect to the axial direction of the rotating shaft provided in the armature of the motor part, and approaches the rotating shaft of the armature as the distance from the motor part increases. Since it is continuous, the O-ring has good adhesion compared to a case in which a step is provided between the case cover and the gear case.

【Example】

1 to 3 show an embodiment of a motor with a reduction mechanism according to the present invention. The illustrated motor 1 with a reduction mechanism mainly includes a motor unit 2, a reduction mechanism 4, a gear case 6, a current supply circuit 10, a connector 15, and a case cover 7. Since the armature 3 is housed in the yoke 5 of the motor unit 2, when the electric current is supplied, the armature 3 rotates and the rotating shaft 3a provided in the armature 3 rotates. The rotary shaft 3a projects into the gear case 6 in the cylinder direction of the yoke 5, and the rotational force of the rotary shaft 3a is transmitted to the reduction mechanism 4 in the gear case 6 to rotate the output shaft 4a provided in the reduction mechanism 4. A wiper link (not shown) serving as a load is coupled to the output shaft 4a. The speed reduction mechanism 4 is housed in an opening 6a provided in the gear case 6, and the gear case 6 holds the open end of the yoke 5 included in the motor unit 2. The opening 6a of the gear case 6 is covered by a case cover 7, and the connecting portion of the gear case 6 to the case cover 7 is assumed to be inclined with respect to the axial direction of the rotation shaft 3a of the motor unit 2. A single continuous connecting inclined surface which approaches the rotating shaft 3a as the distance from the portion 2 increases.
16 are formed. Since the connecting inclined surface 16 is inclined with respect to the axial direction of the rotation shaft 3a of the motor unit 2 and approaches the rotation shaft 3a as the distance from the motor unit 2 increases, the height dimension of the gear case 6 moves away from the motor unit 2. The left side in FIG. 1 is smaller than the right side in FIG. A ring-shaped concave O-ring mounting groove 23 is provided along the connection inclined surface 16 at the connecting portion of the gear case 6 with respect to the case cover 7. O-ring) 22 is fitted. On the other hand, the connecting portion of the case cover 7 to the gear case 6 is inclined with respect to the axial direction of the rotating shaft 3a of the motor unit 2 so as to coincide with the connecting inclined surface 16 of the gear case 6,
In addition, a single continuous connecting inclined surface 21 is formed which approaches the rotating shaft 3a with increasing distance from the motor unit 2.
Since the connection inclined surface 21 is inclined with respect to the axial direction of the rotation shaft 3a of the motor unit 2 and approaches the rotation shaft 3a as it is separated from the motor unit 2, the height dimension of the case cover 7 is different from that of the motor unit 2. The left side in FIG. 1 which is separated is larger than the right side in FIG. A current supply circuit 10 configured to supply a drive current to the armature 3 is housed in the center of the case cover 7, and a base located inside the case cover 7 on the motor unit 2 side. A connector cover 20 is formed along the axial direction of the rotating shaft 3a of the armature 3 at the tip end apart from the end side, and the connector 15 provided with terminals 15a and 15a is integrally housed in the connector cover 20. There is. Since the terminals 15a, 15a of the connector 15 are electrically connected to the current supply circuit 10, this connector
By inserting an external connector (not shown) into 15, the terminals 15a, 15a are electrically connected to an external circuit. Since the connector 15 is arranged at the tip end portion of the case cover 7 which is located away from the base end side which is located on the motor section 2 side, the height dimension of the case cover 7 in this portion is large. The size protruding from the upper surface of 7 is small. The case cover 7 makes the connecting inclined surface 21 abut on the O-ring 22 attached to the gear case 6 while
It is screwed to the gear case 6 so as to coincide with the connection inclined surface 16 of. Here, since the connection inclined surface 21 of the case cover 7 and the connection inclined surface 16 of the gear case 6 form a single continuous surface, for example, a crank-shaped step is formed between the case cover 7 and the gear case 6. The bending stress is not applied to the O-ring 22 as compared with the above. In the motor 1 with a reduction mechanism having such a structure, when a predetermined current is supplied to the armature 3 by supplying a current from the external circuit to the current supply circuit 10 via the terminals 15a, 15a, the armature 3 The rotating shaft 3a also rotates due to the rotation of the rotating shaft 3a, and the rotational force of the rotating shaft 3a is transmitted to the reduction mechanism 4 in the gear case 6 to output the output shaft 4a.
In order to rotate the wiper, the wiper link connected to the output shaft 4a is rotated and the wiper blade wipes the wiped surface. At this time, even if rainwater or the like is splashed on the motor 1 with the reduction mechanism, the connection inclined surface 21 of the case cover 7 and the gear case 6 are
The O-ring 22 is surely brought into close contact with both sides by the connecting inclined surface 16 of the above and prevents the intrusion of rainwater.

[Effect of device]

As described above, since the motor with a reduction mechanism according to the present invention has the above-described configuration, the connector is formed at the end portion of the case cover that holds the current supply circuit, away from the motor portion, and the motor is The height dimension of the gear case of the connector is small due to a single continuous connecting inclined surface that is inclined with respect to the axial direction of the rotating shaft provided on the armature of the armature and approaches the rotating shaft of the armature as it moves away from the motor part. Since it is located on the side, the current supply circuit can be held by the case cover without increasing the height dimensions of the gear case and case cover, and the connecting inclined surface is in the axial direction of the rotating shaft provided on the armature of the motor section. It is a single continuous one that is inclined with respect to and that approaches the axis of rotation of the armature as it moves away from the motor section. Therefore, an excellent effect that on the casing cover and the gear case as compared with that provided with a step it is possible to ensure waterproofing.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an embodiment of a motor with a reduction gear mechanism according to the present invention, FIG. 2 is a vertical sectional view of a gear case in the motor with a reduction gear mechanism shown in FIG. 1, and FIG.
FIG. 4 is a vertical sectional view of a case cover in a motor with a reduction gear mechanism, and FIG. 4 is a vertical cross-sectional side view of a conventional motor with a reduction gear mechanism. 1 ... Motor with reduction mechanism 2 ... Motor part 3 ... Armature 3a ... Rotating shaft 4 ... Reduction mechanism 5 ... Yoke 6 ... Gear case 6a ... Opening 7 ... Case cover 10 ... Current supply circuit 15a …… Terminal 15 …… Connector 16 …… Connecting inclined surface 21 …… Connecting inclined surface

Claims (1)

[Scope of utility model registration request] 1. An armature that rotates when an electric current is supplied, a motor unit having a yoke that accommodates the armature, a reduction mechanism that reduces the rotation of the armature of the motor unit, and an opening that accommodates the reduction mechanism. A gear case that holds a yoke of the motor unit, a current supply circuit that supplies a drive current to an armature of the motor unit, and a connector that includes a terminal electrically connected to the current supply circuit, A motor with a reduction mechanism, which has a terminal cover formed integrally and covers an opening of the gear case and has a case cover attached to the gear case, wherein the current supply circuit is held by the case cover, Connect the connecting part of the case cover to the gear case of the case cover. The connecting portion is a single continuous connecting inclination that is inclined with respect to the axial direction of the rotation shaft provided in the armature of the motor unit and approaches the rotation shaft of the armature as the distance from the motor unit increases. A motor with a reduction mechanism, wherein a surface is formed, and the connector is formed at an end portion of the case cover separated from the motor portion.