JP7069855B2 - Vehicle door switchgear - Google Patents

Description

The present invention relates to a vehicle door opening / closing device.

Conventionally, as a door opening / closing device for a vehicle of this type, a device including a support member for supporting the opening / closing of the door with expansion / contraction has been proposed (see, for example, Patent Document 1). The support member of Patent Document 1 includes a cylindrical housing tube and a protective tube that can move relative to each other so as to overlap in the axial direction. The door is closed by shortening the shaft length, and the door is closed by extending the shaft length. It is supposed to open. In this support member, a sealing member is attached so as to surround the outer peripheral surface on the shaft end side of the housing tube, and the sealing member is formed in the annular gap formed between the housing tube and the protective tube when the door is closed. Enters and prevents the gap, so that the inside of the support member is sealed to the outside.

Japanese Unexamined Patent Publication No. 2015-101637

With the above-mentioned support member, although the inside of the support member can be sealed when the door is closed, the inside of the support member cannot be sealed when the door is open, so that the inundation prevention performance is not sufficient. Further, since the sealing member is exposed to the outside, the sealing member is likely to be deteriorated due to the influence of external dirt, moisture, and the like, and the sealing property may be deteriorated.

The main object of the vehicle door opening / closing device of the present invention is to further improve the water intrusion prevention performance into the support member.

The vehicle door opening / closing device of the present invention has adopted the following means in order to achieve the above-mentioned main object.

The vehicle door opening / closing device of the present invention is a vehicle door opening / closing device provided with a support member interposed between the vehicle body and the door and supporting the door so as to be openable / closable with expansion / contraction. A cylindrical first housing in which a drive unit having a motor is housed, and an inner diameter larger than the outer diameter of the first housing, and the end of the first housing is inserted into the opening end to be inserted into the first housing. On the other hand, a cylindrical second housing that can move relative to the axial direction, a spindle that rotates by driving the drive unit, and a guide with a nut that is fixed in the second housing and screwed into the spindle. The spindle is inserted and fixed to the first housing so as to project axially from the end of the first housing, and a peripheral groove is formed along the circumferential direction on the outer peripheral surface of the portion protruding from the end. The gist is to include a formed fixing member and a ring-shaped sealing member that is arranged in the peripheral groove of the fixing member and seals a gap between the inner peripheral surface of the second housing.

The vehicle door opening / closing device of the present invention includes a fixing member fixed to the first housing so that a spindle rotated by the drive of the drive unit is inserted and the spindle protrudes in the axial direction from the end portion of the first housing. The fixing member has a peripheral groove formed along the circumferential direction on the outer peripheral surface of the portion protruding from the end of the first housing, and the peripheral groove has a ring shape that seals the gap with the inner peripheral surface of the second housing. Seal member is arranged. As a result, even if the first housing and the second housing move relative to each other in the axial direction, the sealing member can continue to seal the gap between the first housing and the second housing. Further, since the seal member is not exposed to the outside, deterioration of the seal member can be suppressed. From these things, it is possible to further improve the performance of preventing water from entering the support member.

In the vehicle door opening / closing device of the present invention, a bearing that rotatably supports the spindle may be arranged, and the drive unit may be a member that positions and fixes the drive unit in the first housing. By doing so, the fixing member can also be used for arranging the bearing and the sealing member, and for positioning and fixing the drive unit, so that the number of parts can be reduced as compared with the case where the fixing member is a separate member.

It is an external view which shows the appearance of the door opening / closing device 10 for a vehicle. It is an external view which shows the appearance of the support member 20. It is a block diagram which shows the structure of the support member 20. It is a block diagram which shows a part of the support member 20 in an enlarged manner. It is explanatory drawing which shows the arrangement state of the seal ring 58. It is an external view which shows the appearance of the support member 120 of the comparative example. It is a block diagram which shows the structure of the support member 120 of the comparative example. It is explanatory drawing which shows the arrangement state of the seal member 146 of the comparative example.

An embodiment for carrying out the present invention will be described with reference to examples.

1 is an external view showing the appearance of the vehicle door opening / closing device 10, FIG. 2 is an external view showing the appearance of the support member 20, and FIG. 3 is a configuration diagram showing the configuration of the support member 20. FIG. Is an enlarged configuration diagram showing a part of the support member 20, and FIG. 5 is an explanatory diagram showing an arrangement state of the seal ring 58. Note that FIG. 3 is a cross-sectional view taken along the line AA of FIG.

As shown in FIG. 1, the vehicle door opening / closing device 10 of the embodiment includes two support members 20 and 20B interposed between the vehicle body 1 and the door 2, and the support member 20 is provided by an actuator built in the support member 20. It is configured as a power door device that opens and closes the door 2 by expanding and contracting. In this embodiment, the door 2 is configured as a flip-up back door whose upper end is attached to the rear portion of the vehicle body 1 via a hinge 4 and which can rotate in the vertical direction with the hinge 4 as a fulcrum. The two support members 20 and 20B are attached to the left and right ends in the vehicle width direction, respectively, and support the door 2 at the left and right ends. The support member 20 is configured to expand and contract by converting the rotational motion of the motor as an actuator into a linear motion. Further, the support member 20B does not have a built-in actuator and assists the opening and closing of the door 2 by the support member 20, and detailed description thereof will be omitted.

As shown in FIGS. 2 to 4, the support member 20 has a bottomed cylindrical resin first housing 30 and an inner diameter slightly larger than the outer diameter of the first housing 30, and the end of the first housing 30. A bottomed cylindrical resin-made second housing 40 into which a portion is inserted, and a spring (compression coil spring) 22 for urging the first housing 30 and the second housing 40 in a direction away from each other are provided. The support member 20 expands and contracts by relatively moving in the axial direction in a state where the first housing 30 and the second housing 40 are overlapped with each other. The first housing 30 and the second housing 40 are provided with sockets 31 and 41 into which ball heads (not shown) of ball studs fixed to the vehicle body 1 and the door 2, respectively, are fitted. The sockets 31 and 41 and the ball stud form a ball joint, and both ends of the support member 20 (first housing 30 and second housing 40) are swingably connected to the vehicle body 1 and the door 2.

The support member 20 includes a spindle 32 in which a spiral groove is formed over substantially the entire axial direction, and a drive unit 50 for rotationally driving the spindle 32 is housed in the first housing 30. An annular stopper 34 protruding radially outward from the outer peripheral surface is provided at the tip end portion 32a (end portion on the second housing 40 side) of the spindle 32. Further, the base end portion 32b (end portion on the drive unit 50 side) of the spindle 32 is rotatably supported by the bearing 55 of the drive unit 50.

As shown in FIGS. 4 and 5, the drive unit 50 includes a motor 52 and a reduction gear (planetary gear) 54 that decelerates the rotation of the motor 52 and transmits the rotation to the spindle 32. The motor 52 is configured as a permanent magnet type synchronous motor including a rotor to which a permanent magnet is attached and a stator in which a three-phase coil is wound.

The drive unit 50 is positioned and fixed in the first housing 30 by the fixing member 56. The fixing member 56 has a large diameter in which a central hole through which the base end portion 32b of the spindle 32 can be inserted is formed, a bearing 55 is arranged on the inner peripheral surface, and the bearing 55 is fixed to the open end portion of the first housing 30 by caulking. It is a stepped cylindrical metal member having a portion 56a and a small diameter portion 56b formed with an outer diameter smaller than that of the large diameter portion 56a. The large-diameter portion 56a of the fixing member 56 is fixed in a state in which a part thereof protrudes from the open end portion of the first housing 30 in the axial direction, and the outer peripheral surface of the protruding portion is radially inward from the outer peripheral surface. A recessed peripheral groove 57 is formed over the entire circumference. The outer peripheral surface of the protruding portion faces the inner peripheral surface of the second housing 40, and a seal ring 58, which is a ring-shaped sealing member such as an O-ring, is fitted and arranged in the peripheral groove 57. The seal ring 58 is formed to have an outer diameter slightly larger than the outer diameter of the large diameter portion 56a, and is in contact with the inner peripheral surface of the second housing 40 in a state of being fitted in the peripheral groove 57 so as to be crushed. By sliding contact with the inner peripheral surface, the gap between the second housing 40 and the inner peripheral surface is sealed. Further, the fixing member 56 is an annular surface 56c of a stepped portion between the large diameter portion 56a and the small diameter portion 56b, and supports the spring 22 via a washer or the like (not shown).

Further, as shown in FIG. 2, the support member 20 includes a cylindrical metal spindle guide 42 and a slide guide 36 in the second housing 40. The inner diameter of the spindle guide 42 is formed to be larger than the outer diameter of the spindle 32, and one end side is opened and the other end side is coaxially fixed to the second housing 40. In the spindle guide 42, the tip end portion 32a of the spindle 32 is inserted from the open end to guide the relative movement of the spindle 32 in the axial direction. A spindle nut 44 screwed to the spindle 32 is fixed to the inner peripheral surface near the open end of the spindle guide 42. The inner diameter of the slide guide 36 is formed to be slightly larger than the outer diameter of the spindle guide 42, and one end side is opened and the other end side is fixed to the small diameter portion 56b of the fixing member 56 so that the slide guide 36 is coaxial with the first housing 30. It is fixed. In the slide guide 36, the open end of the spindle guide 42 is inserted from the open end to guide the relative movement in the axial direction. Although not shown, the spindle guide 42 has a spline extending along the axial direction on the outer peripheral surface, and the slide guide 36 has a spline on the inner peripheral surface that meshes with the spline of the spindle guide 42. There is. As a result, the spindle guide 42 and the slide guide 36 are engaged with each other so that they can move relative to each other in the axial direction and cannot move relative to each other in the rotation direction (relative rotation is impossible).

From these things, the spindle 32 and the spindle nut 44 form a rotational linear motion conversion mechanism that mutually converts relative rotational motion and linear motion motion. Further, since the spindle 32 is rotatably supported in the first housing 30, the spindle guide 42 is coaxially fixed to the second housing 40, and the slide guide 35 is coaxially fixed to the first housing 30, the spindle 32 and the spindle With the relative movement in the axial direction with the guide 42, the slide guide 36 and the spindle guide 42 move relative to each other in the axial direction, so that the first housing 30 and the second housing 40 move relative to each other in the axial direction. That is, the support member 20 expands and contracts.

Further, the above-mentioned spring 22 is arranged between the inner peripheral surface of the second housing 40 and the outer peripheral surface of the slide guide 36, and between the inner peripheral surface of the second housing 40 and the outer peripheral surface of the spindle guide 42. There is. That is, in the present embodiment, the second housing 40 guides the outer diameter of the spring 22 on the inner peripheral surface in the range over the entire length of the spring 22.

Next, the operation of the vehicle door opening / closing device 10 of the embodiment thus configured will be described. The door 2 can be opened and closed by driving the drive unit 50 (motor 52) or manually by the operator. When the door 2 is opened and closed by driving the drive unit 50, the door 2 is opened by rotationally driving the motor 52 in the first direction (forward rotation direction). When the motor 52 is rotationally driven in the first direction, the torque from the motor 52 is amplified by the reduction gear 54 and transmitted to the spindle 32 to rotate the spindle 32 in the first direction. When the spindle 32 rotates in the first direction, the rotational movement of the spindle 32 is converted into the linear movement of the spindle nut 44 in the direction of extending the support member 20. As a result, the support member 20 expands and opens the door 2. On the other hand, the door 2 is closed by rotationally driving the motor 52 in the second direction (reverse rotation direction). When the motor 52 is rotationally driven in the second direction, the torque from the motor 52 is amplified by the reduction gear 54 and transmitted to the spindle 32 to rotate the spindle 32 in the second direction. When the spindle 32 rotates in the second direction, the rotational movement of the spindle 32 is converted into the linear movement of the spindle nut 44 in the direction of contracting the support member 20. As a result, the support member 20 contracts and closes the door 2.

Here, FIG. 6 is an external view showing the appearance of the support member 120 of the comparative example, FIG. 7 is a configuration diagram showing the configuration of the support member 120 of the comparative example, and FIG. 8 is an arrangement of the seal member 146 of the comparative example. It is explanatory drawing which shows the state. 7 is a cross-sectional view taken along the line BB of FIG. In this comparative example, the same components as those in the embodiment are designated by the same reference numerals and the description thereof will be omitted. The support member 120 includes a bottomed cylindrical metal first housing 130 and a second housing 140, and unlike the embodiments, both housings are formed to have similar lengths, and the open ends of both housings overlap each other. Relative movement like. The second housing 140 is formed with a spline 140a that meshes with a spline (not shown) formed on the outer peripheral surface of the first housing 130, whereby the first housing 130 and the second housing 140 cannot rotate relative to each other. Therefore, unlike the embodiment, the support member 120 does not have the slide guide 36, and the spindle guide 142 does not have a spline. A spindle nut 144 screwed to the spindle 32 is fixed to the spindle guide 142. In the support member 120, the first housing 130 and the second housing 140 move relative to each other in the axial direction with the relative movement of the spindle 32 and the spindle guide 142 in the axial direction, and the support member 120 expands and contracts.

As shown in FIG. 8, in the support member 120 of the comparative example, a ring-shaped seal member 146 having a lip-shaped tip portion 146a is attached to a mounting hole 140b formed in the vicinity of the opening end of the second housing 140. The tip portion 146a is in sliding contact with the outer peripheral surface of the first housing 130 to prevent moisture from entering the gap between the first housing 130 and the second housing 140. However, since the seal member 146 is exposed to the outside, it is liable to deteriorate due to the influence of adhesion such as dust and moisture. Further, the tip portion 146a of the seal member 146 is caught by dust adhering to the outer peripheral surface of the first housing 130, ice frozen on the outer peripheral surface, or the like, so that the tip portion 146a is formed in the gap between the first housing 130 and the second housing 140. May be caught and deformed, or the seal member 146 may come off the mounting hole 140b. Therefore, the effect of preventing water from entering the support member 120 may not be sufficient.

On the other hand, in the present embodiment, since the seal ring 58 is fitted in the peripheral groove 57 on the outer peripheral surface of the fixing member 56 fixed to the open end of the first housing 30, the first housing 30 and the second housing 30 and the second housing 30 are second. Even if the housing 40 and the housing 40 move relative to each other in the axial direction, the seal ring 58 can be prevented from coming off and the sealing property can be maintained. Further, since the seal ring 58 is in sliding contact with the inner peripheral surface of the second housing 40 and is not exposed to the outside, the influence of dust and moisture (ice) can be suppressed, and the seal ring 58 is in sliding contact with the outer peripheral surface. It is possible to suppress deterioration as compared with. Therefore, it is possible to improve the performance of preventing water from entering the support member 20.

According to the vehicle door opening / closing device 10 described above, a peripheral groove 57 is formed on the outer peripheral surface of the fixing member 56 fixed to the open end of the first housing 30, and the seal ring 58 is arranged in the peripheral groove 57. Therefore, it is possible to suppress the deterioration of the seal ring 58 and improve the water intrusion prevention performance into the support member 20.

Further, since the fixing member 56 is also used for arranging the seal ring 58, arranging the bearing 55, and positioning and fixing the drive unit 50, the number of parts can be reduced as compared with the case where they are performed by another member.

In the embodiment, the fixing member 56 is used for both the arrangement of the seal ring 58, the arrangement of the bearing 55, and the positioning and fixing of the drive unit 50, but the fixing member 56 is not limited to this, and the fixing member 56 has the arrangement of the seal ring 58. As a work to be performed, a separate member may be used for holding the bearing 55 and fixing the positioning of the drive unit 50.

In the embodiment, the spring 22 that applies an urging force in the direction of extending the support member is provided, but instead of the spring 22, a damper mechanism (for example, a gas type or an oil type) may be provided, or the spring may be provided. 22 may be used in combination with the damper mechanism.

In the embodiment, two support members 20 and 20B for supporting the opening and closing of the door 2 are provided, but only one support member may be provided, or three or more support members may be provided.

In the embodiment, the vehicle door opening / closing device of the present invention is applied to the one that opens / closes the back door provided at the rear of the vehicle body 1, but it may be applied to the opening / closing of other vehicle doors.

The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem will be described. In the embodiment, the support member 20 corresponds to the "support member", the drive unit 50 corresponds to the "drive unit", the first housing 30 corresponds to the "first housing", and the second housing 40 corresponds to the "second housing". The spindle 32 corresponds to the "spindle", the spindle guide 46 corresponds to the "guide", the fixing member 56 corresponds to the "fixing member", and the seal ring 58 corresponds to the "seal member". .. The bearing 55 corresponds to the "bearing".

As for the correspondence between the main elements of the examples and the main elements of the invention described in the column of means for solving the problem, the invention described in the column of means for solving the problems of the examples is carried out. Since it is an example for specifically explaining the form for solving the problem, the elements of the invention described in the column of means for solving the problem are not limited. That is, the interpretation of the invention described in the column of means for solving the problem should be performed based on the description, and the embodiment is a specific example of the invention described in the column of means for solving the problem. It is just one example.

Although the embodiments for carrying out the present invention have been described above with reference to the embodiments, the present invention is not limited to these examples, and the present invention is not limited to these embodiments, and various embodiments are used without departing from the gist of the present invention. Of course it can be done.

The present invention can be used in the manufacturing industry of vehicle door opening / closing devices and the like.

1 car body, 2 doors, 4 hinges, 10 vehicle door opening / closing devices, 20, 20B, 120 support members, 22 coil springs, 30, 130 first housings, 31 sockets, 32 spindles, 32a tips, 32b base ends, 34 Stopper, 40,140 2nd Housing, 41 Socket, 42,142 Spindle Guide, 44,144 Spindle Nut, 50 Drive Unit, 52 Motor, 54 Reduction Gear, 55 Bearing, 56 Fixing Member, 56a Large Diameter, 56b Small Diameter Part, 56c annular surface, 57 peripheral groove, 58 seal ring, 140a spline, 140b mounting hole, 146 seal member, 146a tip.

Claims (1)

A vehicle door opening / closing device provided with a support member interposed between the vehicle body and the door to support the door so as to be openable / closable with expansion / contraction.
The support member is
A cylindrical first housing containing a drive unit with a motor,
A tubular second having an inner diameter larger than the outer diameter of the first housing and having an open end of the first housing inserted into the open end so as to be movable relative to the first housing in the axial direction. With the housing
A spindle that rotates by driving the drive unit,
A spindle guide fixed in the second housing and fitted with a nut screwed into the spindle,
A slide guide having an inner diameter larger than the outer diameter of the spindle guide and having the open end of the spindle guide inserted into the open end on one end side to guide the relative movement of the spindle guide in the axial direction.
The spindle is inserted and fixed to the first housing so as to project axially from the open end of the first housing, and a peripheral groove is formed along the circumferential direction on the outer peripheral surface of the portion protruding from the open end. With the fixing member on which
A ring-shaped sealing member arranged in the peripheral groove of the fixing member and sealing a gap with the inner peripheral surface of the second housing, and a ring-shaped sealing member.
Equipped with
The fixing member has a large-diameter portion fixed to the open end portion of the first housing and a small-diameter portion having an outer diameter smaller than the large-diameter portion. A bearing that rotatably supports the spindle is arranged on the inner peripheral surface of the portion to be inserted into the open end, and the peripheral groove is formed on the outer peripheral surface of the portion protruding from the open end, and the small diameter portion is formed. The other end of the slide guide is fixed
Vehicle door opening and closing device.

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