JP2019157357A - Door opening/closing device for vehicle - Google Patents

Abstract

To further improve performance of preventing inundation into a support member.SOLUTION: A door opening/closing device for a vehicle includes a support member comprising: a cylindrical first housing 30 in which a drive unit 50 having a motor 52 is housed; a cylindrical second housing 40 that has an inner diameter larger than an outer diameter of the first housing, has an opening end into which an end of the first housing is inserted, and is axially movable relatively to the first housing; a spindle 32 that rotates using driving of the motor; a guide 36, fixed in the second housing, to which a nut screwing with the spindle is attached; a fixation member 56 into which the spindle is inserted, the fixation member being fixed to the first housing so as to protrude in the axial direction from the end of the first housing, the fixation member having a circumferential groove 57 formed on a circumferential surface of a part protruding from the end along the circumferential direction; and a ring-like seal member 58 disposed in the circumferential groove of the fixation member to seal a gap with an inner circumferential surface of the second housing.SELECTED DRAWING: Figure 4

Description

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

  2. Description of the Related Art Conventionally, as this type of vehicle door opening and closing device, a device including a support member that supports opening and closing of a door with expansion and contraction has been proposed (for example, see 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 reducing the axial length, and the door is extended by extending the axial length. It is something that opens. In this support member, a seal member is attached so as to surround the outer peripheral surface on the shaft end side of the housing tube, and the seal member is inserted into an annular gap formed between the housing tube and the protective tube when the door is closed. The inside of the support member is sealed from the outside by preventing the gap.

Japanese Patent Laying-Open No. 2015-101537

  In the above-described support member, the inside of the support member can be sealed with the door closed, but the inside of the support member cannot be sealed with the door open, so that it cannot be said that the water immersion prevention performance is sufficient. In addition, since the seal member is exposed to the outside, the seal member is likely to deteriorate due to the influence of external dirt, moisture, etc., and the sealing performance may be reduced.

  The vehicle door opening and closing device of the present invention is mainly intended to further improve the performance of preventing flooding into the support member.

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

  The vehicle door opening and closing device of the present invention is a vehicle door opening and closing device that is interposed between a vehicle body and a door and includes a support member that supports the door in an openable and closable manner, and the support member includes: A cylindrical first housing in which a drive unit having a motor is accommodated, an inner diameter larger than an outer diameter of the first housing, and an end portion of the first housing is inserted into an open end. A cylindrical second housing capable of relative movement in the axial direction, a spindle rotated by driving of the drive unit, and a guide attached to a nut fixed in the second housing and screwed into the spindle. , The spindle is inserted and is fixed to the first housing so as to protrude in the axial direction from the end of the first housing, and the portion protruding from the end A fixing member having a circumferential groove formed in a circumferential direction on a circumferential surface, and a ring-shaped sealing member disposed in the circumferential groove of the fixing member and sealing a gap between the inner circumferential surface of the second housing, and The gist is to provide.

  The vehicle door opening and closing device of the present invention includes a fixing member that is fixed to the first housing so that a spindle that rotates by driving of the drive unit is inserted and protrudes in an axial direction from an end of the first housing. The fixing member has a circumferential groove formed along the circumferential direction on the outer peripheral surface of the portion protruding from the end of the first housing, and a ring shape that seals a gap between the peripheral groove and the inner peripheral surface of the second housing. The seal member is arranged. Thereby, even if the first housing and the second housing move relative to each other in the axial direction, the seal 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, the deterioration of the seal member can be suppressed. For these reasons, it is possible to further improve the performance of preventing flooding into the support member.

  In the vehicle door opening and closing apparatus according to the present invention, a bearing that rotatably supports the spindle may be disposed and may be a member that positions and fixes the drive unit in the first housing. In this case, the fixing member can be used for both the arrangement of the bearing and the seal member and the positioning and fixing of 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 external appearance of the vehicle door opening / closing apparatus 10. FIG. 2 is an external view showing an external appearance of a support member 20. FIG. 3 is a configuration diagram showing a configuration of a support member 20. FIG. FIG. 3 is a configuration diagram illustrating a part of a support member 20 in an enlarged manner. It is explanatory drawing which shows the arrangement | positioning state of the seal ring 58. FIG. It is an external view which shows the external appearance of the supporting member 120 of a comparative example. It is a block diagram which shows the structure of the support member 120 of a comparative example. It is explanatory drawing which shows the arrangement | positioning state of the sealing member 146 of a comparative example.

  The form for implementing this invention is demonstrated using an Example.

  1 is an external view showing the external appearance of the vehicle door opening and closing device 10, FIG. 2 is an external view showing the external appearance of the support member 20, and FIG. 3 is a configuration diagram showing the configuration of the support member 20. FIG. 5 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. 3 is a cross-sectional view taken along the line AA in FIG.

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

  As shown in FIGS. 2 to 4, the support member 20 has a bottomed cylindrical resin-made first housing 30 and an inner diameter slightly larger than the outer diameter of the first housing 30. A bottom-shaped cylindrical resin-made second housing 40 into which the portion is inserted, and a spring (compression coil spring) 22 that biases the first housing 30 and the second housing 40 away from each other. 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 are fitted. The sockets 31 and 41 and the ball stud constitute a ball joint, and both end portions of the support member 20 (the first housing 30 and the 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 that rotationally drives the spindle 32 is accommodated in the first housing 30. An annular stopper 34 that protrudes radially outward from the outer peripheral surface is provided at the tip 32 a (end on the second housing 40 side) of the spindle 32. Further, the base end portion 32 b (end portion on the drive unit 50 side) of the spindle 32 is rotatably supported by a bearing 55 of the drive unit 50.

  The drive unit 50 includes a motor 52 and a reduction gear (planetary gear) 54 that reduces the rotation of the motor 52 and transmits it to the spindle 32 as shown in FIGS. 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 around which a three-phase coil is wound.

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

  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 spindle guide 42 has an inner diameter 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. The spindle guide 42 guides the relative movement in the axial direction of the spindle 32 by inserting the tip 32a of the spindle 32 from the open end. A spindle nut 44 that is screwed onto the spindle 32 is fixed to the inner peripheral surface near the opening end of the spindle guide 42. The slide guide 36 has an inner diameter that is slightly larger than the outer diameter of the spindle guide 42. The slide guide 36 is coaxial with the first housing 30 by opening one end and fixing the other end to the small diameter portion 56 b of the fixing member 56. Fixed. In the slide guide 36, the opening end of the spindle guide 42 is inserted from the opening end to guide 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 meshing with the spline of the spindle guide 42 formed on the inner peripheral surface. Yes. As a result, the spindle guide 42 and the slide guide 36 are engaged so that they can move relative to each other in the axial direction and cannot move relative to each other in the rotational direction (relative rotation impossible).

  For these reasons, the spindle 32 and the spindle nut 44 constitute a rotation / linear motion conversion mechanism that converts relative rotational motion and linear motion to each other. 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. Along with the relative movement of the guide 42 in the axial direction, the slide guide 36 and the spindle guide 42 relatively move in the axial direction, so that the first housing 30 and the second housing 40 move relatively in the axial direction. That is, the support member 20 expands and contracts.

  The spring 22 described above is disposed 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. Yes. In other words, 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 thus configured vehicle door opening and closing apparatus 10 according to the embodiment 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, torque from the motor 52 is amplified by the reduction gear 54 and transmitted to the spindle 32, causing the spindle 32 to rotate in the first direction. When the spindle 32 rotates in the first direction, the rotational motion of the spindle 32 is converted into a linear motion of the spindle nut 44 in a direction in which the support member 20 is extended. Thereby, the support member 20 expand | extends and the door 2 is open | released. 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, torque from the motor 52 is amplified by the reduction gear 54 and transmitted to the spindle 32, causing the spindle 32 to rotate in the second direction. When the spindle 32 rotates in the second direction, the rotational motion of the spindle 32 is converted into a linear motion of the spindle nut 44 in a direction in which the support member 20 is contracted. Thereby, the support member 20 contracts and the door 2 is closed.

  Here, FIG. 6 is an external view showing the external appearance of the support member 120 of the comparative example, FIG. 7 is a structural view 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 a state. 7 is a cross-sectional view taken along the line BB in FIG. In this comparative example, the same components as those in the embodiment are denoted by the same reference numerals and description thereof is omitted. The support member 120 includes a first cylindrical metal housing 130 and a second housing 140 having a bottomed cylindrical shape. Unlike the embodiment, the two housings are formed to have a length close to each other, and the opening ends of the two housings overlap each other. Move relative. 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, so that the first housing 130 and the second housing 140 cannot be rotated relative to each other. Therefore, the support member 120 does not include the slide guide 36 unlike the embodiment, and the spindle guide 142 is not formed with a spline. A spindle nut 144 that is screwed onto the spindle 32 is fixed to the spindle guide 142. As the support member 120 moves relative to the spindle 32 and the spindle guide 142 in the axial direction, the first housing 130 and the second housing 140 move relative to each other in the axial direction, so that 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 146a is attached to an attachment hole 140b formed in the vicinity of the opening end of the second housing 140. The tip 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, the seal member 146 is easily deteriorated due to the influence of adhesion of dust or moisture. Further, the front end 146 a of the seal member 146 is caught by dust attached to the outer peripheral surface of the first housing 130 or ice frozen on the outer peripheral surface, so that the front end 146 a is inserted into the gap between the first housing 130 and the second housing 140. May be deformed by being caught, or the seal member 146 may be detached from the mounting hole 140b. For this reason, the effect of preventing water intrusion into the support member 120 may not be sufficient.

  On the other hand, in this embodiment, since the seal ring 58 is fitted in the circumferential groove 57 on the outer peripheral surface of the fixing member 56 fixed to the opening end of the first housing 30, the first housing 30 and the second housing Even if the housing 40 moves relative to the axial direction, the seal ring 58 can be prevented from coming off and the sealing performance 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 or moisture (ice) can be suppressed, and the seal ring 58 is in sliding contact with the outer peripheral surface. Degradation can be suppressed compared to. Accordingly, it is possible to improve the performance of preventing water from entering the support member 20.

  According to the vehicle door opening and closing apparatus 10 described above, the circumferential groove 57 is formed on the outer peripheral surface of the fixing member 56 fixed to the opening end of the first housing 30, and the seal ring 58 is disposed in the circumferential groove 57. Therefore, the deterioration of the seal ring 58 can be suppressed, and the performance of preventing water from entering the support member 20 can be improved.

  Further, since 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, the number of parts can be reduced as compared with the case where these are performed by separate members.

  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. However, the fixing member 56 is not limited to this, and the arrangement of the sealing ring 58 is not limited thereto. As what is performed, another member may be used for holding the bearing 55 and positioning and fixing the drive unit 50.

  In the embodiment, the spring 22 for applying a biasing force in the direction in which the support member is extended is provided. However, a damper mechanism (for example, a gas type or an oil type) may be provided instead of the spring 22 or the spring. It is good also as what uses 22 and a damper mechanism together.

  In the embodiment, the two support members 20 and 20B that support the opening and closing of the door 2 are provided. However, 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 device for opening and closing the back door provided at the rear portion of the vehicle body 1, but may be applied to the opening and 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 problems 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 “sealing member”. . The bearing 55 corresponds to a “bearing”.

  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 is the same as that of the embodiment described in the column of means for solving the problem. Therefore, the elements of the invention described in the column of means for solving the problems are not limited. That is, the interpretation of the invention described in the means for solving the problems should be made based on the description, and the examples are specific examples of the invention described in the means for solving the problems. This is just one example.

  As mentioned above, although the form for implementing this invention was demonstrated using the Example, this invention is not limited at all to such an Example, In the range which does not deviate from the summary of this invention, it is with various forms. Of course, it can be implemented.

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

  DESCRIPTION OF SYMBOLS 1 Vehicle body, 2 doors, 4 hinges, 10 door opening / closing device for vehicles, 20, 20B, 120 support member, 22 coil spring, 30, 130 1st housing, 31 socket, 32 spindle, 32a front-end | tip part, 32b base end part, 34 Stopper, 40, 140 Second 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 part, 56b Small diameter Part, 56c annular surface, 57 circumferential groove, 58 seal ring, 140a spline, 140b mounting hole, 146 seal member, 146a tip.

Claims (2)

A vehicle door opening and closing device comprising a support member interposed between a vehicle body and a door and supporting the door so as to be opened and closed with expansion and contraction,
The support member is
A cylindrical first housing containing a drive unit having a motor;
A cylindrical second housing having an inner diameter larger than an outer diameter of the first housing, an end of the first housing being inserted into an open end, and a relative movement in the axial direction with respect to the first housing; ,
A spindle that rotates by driving the drive unit;
A guide fixed in the second housing and fitted with a nut screwed to the spindle;
The spindle is inserted and fixed to the first housing so as to protrude from the end of the first housing in the axial direction, and a circumferential groove is formed along the circumferential direction on the outer peripheral surface of the portion protruding from the end. A fixed member,
A ring-shaped sealing member that is disposed in the circumferential groove of the fixing member and seals a gap with the inner peripheral surface of the second housing;
A vehicle door opening and closing device. The vehicle door opening and closing device according to claim 1,
The fixing member is a member in which a bearing that rotatably supports the spindle is disposed, and the driving unit is positioned and fixed in the first housing.

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