JP2017115403A - Vehicle door opening and closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an adequate holding power to be generated in both opening and closing directions when holding a door in an open state.SOLUTION: A bearing member has a rotation direct-acting conversion mechanism made up of a spindle and a spindle nut and supports opening and closing of a door by expanding and contracting. A one-way clutch 60 is installed on the bearing member. The one-way clutch transmits a rotational torque to a resistance generating member 70 when the rotational torque in one direction acts on the spindle, and intercepts the transmission of the rotational torque to the resistance generating member 70 when the rotational torque in the opposite direction acts on the spindle. In the one-way clutch 60, the torque transmission direction is set so that rotational resistance due to the resistance generating member 70 is transmitted in door opening direction or closing direction, whichever requires greater holding power.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a vehicle door opening and closing device, and more specifically, includes a cylindrical first housing and a second housing interposed between a vehicle body and a door, and the first housing and the second housing The present invention relates to a vehicle door opening / closing device including a support member that supports the door to be opened and closed with expansion and contraction due to relative movement in an axial direction.

  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 includes a cylindrical first housing and a second housing that are relatively movable in the axial direction, a spindle that is rotatably supported in the first housing, a motor that rotationally drives the spindle, and a second housing. And a guide tube into which the spindle is inserted, and a spindle nut attached to the guide tube and screwed into the spindle. The support member expands and contracts when the first housing and the second housing move relative to each other along with the movement of the spindle nut due to the rotation of the spindle. A vehicle door opening and closing device including such a supporting member can open and close the door by expanding and contracting the supporting member by rotating and driving the spindle by a motor, and can also open and close the door by an operator's manual operation. . Further, an engagement protrusion protruding in the radial direction is provided at the tip of the spindle, and the engagement protrusion is frictionally engaged with a friction engagement part formed on the inner wall of the guide tube, thereby opening the door. A holding force for holding in position is obtained.

JP 2014-101737 A

  In the vehicle door opening / closing device described above, the frictional engagement force is generated by bringing the engagement protrusion provided on the spindle into contact with the friction engagement portion of the guide tube. That is, the same frictional engagement force is generated in both the opening direction and the closing direction of the door. For this reason, when the required holding force differs between the extending direction and the contracting direction of the support member, if the frictional engagement force is designed according to the direction in which the required holding force is large, the frictional engagement force is in the direction in which the required holding force is small. The resultant force becomes excessive, and a large operating force is required for the operator to manually operate the door in that direction. On the other hand, if the frictional engagement force is designed in a direction where the required holding force is small, the frictional engagement force is too small in the direction where the necessary holding force is large, and the holding force necessary to hold the door in that direction is insufficient. .

  The main purpose of the vehicle door opening and closing device of the present invention is to generate an appropriate holding force in both the opening direction and the closing direction when the door is held in the open state.

  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 comprises:
A cylindrical first housing and a second housing interposed between the vehicle body and the door are provided, and the door can be opened and closed with expansion and contraction due to relative movement in the axial direction of the first housing and the second housing. A vehicle door opening and closing device including a supporting member for supporting,
The support member is
A rotation / linear motion conversion mechanism having a spindle rotatably supported in the first housing and capable of mutually converting the rotational movement of the spindle and the relative movement of the first housing and the second housing;
A motor for rotationally driving the spindle;
Rotation resistance applying means for applying rotation resistance;
When rotational torque in one direction acts on the spindle, the rotational torque is transmitted to the rotational resistance applying means, and when rotational torque in the reverse direction acts on the spindle, the rotational torque is transmitted to the rotational resistance applying means. A one-way clutch to shut off;
It is a summary to provide.

  In the vehicle door opening and closing device of the present invention, when a rotational torque in one direction acts on the spindle that can be expanded and contracted by the rotation / linear motion conversion mechanism having the spindle, the rotational torque is transmitted to the rotational resistance applying means. In addition, a one-way clutch is provided that blocks transmission of rotational torque to the rotational resistance applying means when reverse rotational torque acts on the spindle. Thereby, different resistance forces can be applied in the direction in which the support member extends and contracts, that is, in the door opening direction and the closing direction. As a result, by setting the transmission direction of the torque of the one-way clutch so that the rotation resistance by the rotation resistance applying means is transmitted to the direction in which the required holding force is large among the opening direction and the closing direction of the door, When holding the door in the open state, an appropriate holding force can be generated in both the opening direction and the closing direction.

  In such a vehicle door opening and closing device of the present invention, the rotating shaft of the motor is connected to the spindle via a reduction gear, and the one-way clutch is interposed between the reduction gear and the spindle. In addition, the one-way clutch may be interposed between the motor and the reduction gear. In the former case, since the rotational resistance of the rotational resistance applying means is directly transmitted to the spindle, a stable rotational resistance can be applied to the spindle. In the latter case, since the rotational resistance of the rotational resistance applying means is amplified by the reduction gear and transmitted to the spindle, the rotational resistance applied to the spindle can be increased.

  In the vehicle door opening and closing device according to the present invention, the spindle may be connected to an inner ring of the one-way clutch, and the rotation resistance applying means may apply a rotation resistance to the outer ring of the one-way clutch. it can. If it carries out like this, a rotation resistance provision means can be made into a simpler structure.

  Alternatively, in the vehicle door opening and closing device of the present invention, the rotation resistance applying means may apply rotation resistance by contact friction, or the rotation resistance applying means may apply rotation resistance by a magnetic attractive force. It can also be done. In the former case, the rotation resistance applying means may include a friction member and an urging means for urging the friction member in a direction in contact with the outer ring of the one-way clutch. The means may include an elastic member that contacts an outer ring of the one-way clutch.

  In the vehicular door opening and closing apparatus according to the present invention, the door may be a flip-up type door whose upper end is rotatably supported with respect to the vehicle body. In this case, since the moment by the weight of the supporting member acts on the door, the difference between the holding force required in the extending direction of the supporting member and the required holding force in the contracting direction is often large, so the present invention is applied. Significance is greater.

1 is an external view showing an external appearance of a vehicle door opening and closing device 10 as one embodiment of the present invention. 2 is a configuration diagram showing an outline of the configuration of a support member 20. FIG. FIG. 4 is a partially enlarged view showing a part of the support member 20 in an enlarged manner. FIG. 3 is an exploded perspective view showing the drive unit 50 in an exploded manner. FIG. 2 is a configuration diagram showing an outline of a configuration of a drive unit 50. FIG. 3 is a configuration diagram showing an outline of a configuration of a resistance generating member 70. It is explanatory drawing explaining the moment by the spring load which acts around the fulcrum of the door 2, and a door self-weight moment. It is explanatory drawing which shows the relationship between the difference of the moment by a spring load, and the door self-weight moment, and a door opening degree. It is a block diagram which shows the outline of a structure of the resistance generation member 170 of a modification. It is a block diagram which shows the outline of a structure of the resistance generation member 270 of a modification.

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

  FIG. 1 is an external view showing the appearance of a vehicle door opening and closing device 10 as an embodiment of the present invention, FIG. 2 is a block diagram showing an outline of the configuration of a support member 20, and FIG. FIG. 4 is an exploded perspective view showing the drive unit 50 in an exploded manner, FIG. 5 is a configuration diagram showing an outline of the configuration of the drive unit 50, and FIG. FIG. 3 is a configuration diagram showing an outline of a configuration of a resistance generating member 70.

  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.

  As shown in FIG. 2, the support member 20 includes a bottomed cylindrical first housing 30, a bottomed cylindrical second housing 40 having an inner diameter slightly larger than the outer diameter of the first housing 30, and a first A compression coil spring 22 that urges the housing 30 and the second housing 40 in directions away from each other is provided. The support member 20 expands and contracts by relatively moving in the axial direction with the open ends of the first housing 30 and the second housing 40 overlapped with each other.

  The non-opening ends of 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. (See FIG. 2). 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.

  As shown in FIG. 2, the first housing 30 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. 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 36 fixed to the inner peripheral surface of the first housing 30.

  As shown in FIG. 2, the second housing 40 includes a spindle guide 42 formed in a cylindrical shape having an outer diameter smaller than the inner diameter of the second housing 40. One end of the spindle guide 42 is opened and the other end is coaxially fixed to the second housing 40. The compression coil spring 22 described above is disposed in the gap between the inner peripheral surface of the second housing 40 and the outer peripheral surface of the spindle guide 42.

  The inner diameter of the spindle guide 42 is set larger than the outer diameter of the spindle 32, and the outer diameter of the stopper 34 provided at the tip 32 a of the spindle 32 is set smaller than the inner diameter of the spindle guide 42. The spindle guide 42 is inserted with the tip 32 a of the spindle 32 from the open end, and guides the relative movement of the spindle 32 in the axial direction with respect to the spindle guide 42.

  Further, as shown in FIG. 3, a spindle nut 44 that is screwed into the spindle 32 inserted into the spindle guide 42 is fixed to the inner peripheral surface near the opening end of the spindle guide 42. The spindle 32 and the spindle nut 44 constitute a rotation / linear motion conversion mechanism that mutually converts these relative rotational motion and linear motion.

  As shown in FIG. 3, a reduced diameter portion 42 a is formed at a position that is spaced from the opening end of the spindle guide 42 in the axial direction by the formation region of the spindle nut 44. The reduced diameter portion 42 a is formed by pressing or the like so that the inner diameter is smaller than the outer diameter of the stopper 34. As described above, since the spindle 32 is rotatably supported in the first housing 30 and the spindle guide 42 is coaxially fixed in the second housing 40, the relative movement of the spindle 32 and the spindle guide 42 in the axial direction. Accordingly, the first housing 30 and the second housing 40 are relatively moved in the axial direction. When the stopper 34 provided at the tip end portion 32a of the spindle 32 comes into contact with the reduced diameter portion 42a of the spindle guide 42, the movement of the first housing 30 and the second housing 40 in the extending direction is restricted. This prevents the spindle 32 from falling off the spindle guide 42 and the spindle nut 44.

  As shown in FIG. 4 or FIG. 5, the drive unit 50 includes a motor 52 having a rotation shaft 52a rotatably supported by a bearing 51, and a reduction gear (which reduces the rotation of the rotation shaft 52a and transmits the rotation to the spindle 32. (Planetary gear) 54, a resistance generating member 70, a rotating shaft 52a of the motor 52, and a one-way clutch 60 attached to the resistance generating member 70. The drive unit 50 includes a motor case 53 that houses the motor 52, a gear case 55 that houses the reduction gear 54, and a unit case 56 that houses the one-way clutch 60 and the resistance generating member 70 in a united state. One housing 30 is disposed. The unit case 56 is connected to the motor case 53 by a fixing bracket 58. In addition, the gear case 55 is coupled to the unit case 56 by a locking claw 55 a formed in the gear case 55 being locked in a locking hole 56 a formed in the unit case 56.

  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. Since the motor 52 is a permanent magnet type motor, when the rotor is rotated by an external force, a cogging torque serving as a rotational resistance is generated.

  As shown in FIG. 6, the one-way clutch 60 includes an inner ring 62 to which the rotation shaft 52 a of the motor 52 is connected and an outer ring 64 to which the resistance generating member 70 is connected, and is disposed between the inner ring 62 and the outer ring 64. The rotational torque is transmitted only in one direction by the torque transmission member 66 such as sprags and cams. In this embodiment, the one-way clutch 60 applies rotational torque to the outer ring 64 (resistance) when the direction of rotational torque acting on the inner ring 62 (rotating shaft 52a) is the direction in which the support member 20 is extended (direction in which the door 2 is opened). Generating member 70) and transmitting torque to the outer ring 64 when the direction of the rotational torque acting on the inner ring 62 is the direction in which the support member 20 is contracted (the direction in which the door 2 is closed). The transmission direction was set.

  As shown in FIG. 6, the resistance generating member 70 generates a frictional resistance by an annular member 72 fixed to the unit case 58 and an inner peripheral surface supported by the annular member 72 contacting the outer ring 64 of the one-way clutch 60. And a friction ring 74. In the present embodiment, the friction ring 74 is a resin ring, and is in close contact with the outer peripheral surface of the outer ring 64 while being fitted into the annular member 72.

  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) and also 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 52 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.

  FIG. 7 is an explanatory view for explaining the moment due to the spring load acting on the fulcrum of the door 2 and the door's own weight moment, and FIG. 8 shows the difference between the moment due to the spring load and the door's own weight moment and the door opening degree. It is explanatory drawing which shows a relationship. In this embodiment, the door 2 is configured as a flip-up type door that can be rotated in the vertical direction. For this reason, as shown in FIG. 7, the moment by the spring load of the supporting members 20 and 20B and the door self-weight moment act around the fulcrum of the door 2. When the moment due to the spring load is balanced with the door's own weight moment (on the “0” line in FIG. 8), the door 2 is maintained in the open state, but the moment due to the spring load is greater than the door's own weight moment. Then, it turns in the opening direction (lifts), and when the moment due to the spring load becomes smaller than the door weight moment, it turns (drops) in the closing direction. Therefore, the door 2 is lifted by generating a resistance force corresponding to the difference between the moment due to the spring load and the door self-weight moment in the extending direction of the support member 20 (the opening direction of the door 2) and the contracting direction (the closing direction). And can prevent falling.

  Here, in the case where the conventional structure that generates the same resistance force in the extension direction and the contraction direction is adopted as the support member 20, in order to prevent both the lift and fall of the door 2, The resistance must be set according to the worst condition or the worst condition of falling. For this reason, as shown in FIG. 8 (a), when the resistance force is set in accordance with the worst condition of severe lifting, the set resistance force is higher than the actually required holding force for the worst condition of dropping. Increased and excessive resistance. For this reason, when an operator closes the door 2 by manual operation, a big operation force is required.

  In contrast, in the present embodiment, the support member 20 includes the resistance generating member 70 and the one-way clutch 60 that transmits the rotational torque to the resistance generating member 70 only when a rotational torque in one direction acts on the spindle 32. Since it is provided, different resistance forces can be generated in the extending direction and the contracting direction of the support member 20. Therefore, in the present embodiment, the required holding force is applied by the cogging torque of the motor 52 under the mild condition of the worst condition of the lift (opening direction) of the door 2 and the worst condition of the fall, and the condition is severe. The holding force that is insufficient with respect to the direction is applied by the rotational resistance of the resistance generating member 70. Thereby, a necessary and sufficient holding force can be applied to both the opening direction and the closing direction of the door 2. That is, the operator does not need a large operating force when the door 2 is opened or closed by manual operation.

  According to the vehicle door opening and closing apparatus 10 of the present embodiment described above, the rotational torque in one direction is applied to the spindle 32 on the support member 20 that can be expanded and contracted by the rotation / linear motion conversion mechanism including the spindle 32 and the spindle nut 44. A one-way clutch 60 is provided that transmits rotational torque to the resistance generating member 70 only when acting. Thereby, it is possible to apply different resistances in the extending direction and the contracting direction of the support member 20. Therefore, by setting the torque transmission direction of the one-way clutch 60 so that the rotational resistance by the resistance generating member 70 is transmitted to the direction in which the required holding force is large among the opening direction and the closing direction of the door 2, When holding the door 2 in the open state, an appropriate holding force can be generated in both the opening direction and the closing direction. As a result, the door 2 can be appropriately held in the open state, and the operating force required for the operator to open and close the door 2 by manual operation can be further reduced.

  Further, according to the vehicle door opening and closing device 10 of the present embodiment, the inner ring 62 of the one-way clutch 60 is attached to the rotating shaft 52 a between the motor 52 and the reduction gear 54. As a result, the rotational resistance of the resistance generating member 70 can be amplified and transmitted to the spindle 32 via the reduction gear 54, which is sufficient for holding the door 2 in the open state while reducing the size of the resistance generating member 70. A holding force can be generated.

  Furthermore, according to the vehicle door opening and closing device 10 of the present embodiment, the friction ring 74 is directly brought into contact with the outer ring 64 of the one-way clutch 60 to generate a frictional resistance on the outer ring 64. Thereby, rotation resistance can be provided to the spindle 32 with a simple configuration.

  In the vehicle door opening and closing device 10 of the embodiment, the inner ring 64 of the one-way clutch 60 is attached to the rotation shaft 52a between the motor 52 and the reduction gear 54. However, the rotation between the spindle 32 and the reduction gear 54 is performed. It may be attached to the shaft. As a result, the resistance generating member 70 directly transmits rotational resistance to the spindle 32 without passing through the reduction gear 54, and can provide stable rotational resistance to the spindle 32.

  In the vehicle door opening and closing apparatus 10 of the embodiment, the holding force necessary for the looser condition among the worst condition of the lift of the door 2 and the worst condition of the fall is generated by the cogging torque of the motor 52. On the other hand, the holding force described above may be generated by frictional resistance by making the inner peripheral surface of the spindle guide 42 and the outer peripheral surface of the stopper 34 slidable, or the spindle 32 and the spindle. It may be generated by frictional resistance with the nut 44.

  The vehicle door opening and closing device 10 according to the embodiment includes one resistance generating member 70 and one one-way clutch 60 that transmits the rotational torque to the resistance generating member 70 only when a rotational torque in one direction acts on the spindle 32. It was supposed to be. On the other hand, the first rotation torque is generated only when the rotation resistance in one direction acts on the two resistance generation members (first resistance generation member and second resistance generation member) capable of generating different rotation resistances and the spindle 32. A first one-way clutch that transmits to the resistance generating member and a second one-way clutch that transmits the rotational torque to the second resistance generating member only when the rotational torque in the reverse direction of the spindle 32 acts may be provided. Thus, by providing two resistance generating members that generate different rotational resistances and two one-way clutches that transmit rotational torque in different directions to the corresponding resistance generating members, the extending direction and the contracting direction of the support member 20 are provided. Different resistances can be generated. In this case, one of the two one-way clutches is attached to the rotating shaft 52a between the motor 52 and the reduction gear 54, and the other one-way clutch is rotated between the spindle 32 and the reduction gear 54. It may be attached to the shaft.

  In the vehicle door opening and closing device 10 of the embodiment, the one-way clutch 60 generates rotational torque when the direction of rotational torque acting on the inner ring 62 (rotating shaft 52a) is the direction that opens the door 2, and the outer ring 64 (resistance generating member 70). ) And when the direction of the rotational torque acting on the inner ring 62 is the direction to close the door 2, the transmission of the rotational torque to the outer ring 64 is cut off. On the other hand, when the direction of the rotational torque acting on the inner ring 62 is the direction for closing the door 2, the rotational torque is transmitted to the outer ring 64, and the direction of the rotational torque acting on the inner ring 62 is the direction for opening the door 2. Sometimes, transmission of rotational torque to the outer ring 64 may be cut off. The direction in which the one-way clutch 60 transmits the rotational torque may be the one in which the necessary holding force is larger in the opening direction and the closing direction of the door 2.

  In the vehicle door opening and closing device 10 of the embodiment, the friction ring 74 is brought into contact with the outer ring 64 of the one-way clutch 60 as the resistance generating member 70 to impart rotational resistance to the outer ring 64. On the other hand, it is good also as what gives a rotation resistance to the outer ring | wheel 64 by pressing a friction piece against the outer ring | wheel 64 of the one-way clutch 60 using urging | biasing force. FIG. 9 is a configuration diagram showing an outline of the configuration of the resistance generation member 170 of the modification. The resistance generation member 170 of the modification includes an annular member 172 fixed to the unit case, a resin friction piece 174, and a coil that has one end fixed to the inner peripheral surface of the annular member 172 and presses the friction piece 174 toward the outer ring 64 side. A spring 176. Four friction pieces 174 are provided at equal angular intervals in the circumferential direction so as to surround the outer ring 64 of the one-way clutch 60, and are urged radially inward by corresponding coil springs 176, respectively. The resistance generating member 170 of this modification can easily adjust the holding force in one direction of the door 2 by adjusting the spring load of the coil spring 176.

  In the resistance generating member 170 of the above-described modification, the friction piece 174 is formed of resin, but may be formed of metal. Further, in the resistance generation member 170 of the modified example, the friction piece 174 is pressed against the outer ring 64 by the urging force of the coil spring 176, but a plate spring may be used instead of the coil spring 176. In this case, a part of the leaf spring may be directly brought into contact with the outer ring 64 of the one-way clutch 60 without providing a friction piece. Furthermore, although the resistance generating member 170 of the modified example includes four friction pieces 174, the number of friction pieces may be any number.

  In the vehicle door opening and closing device 10 of the embodiment, the resistance generating member 70 is provided with rotational resistance to the outer ring 64 of the one-way clutch 60 by frictional resistance. On the other hand, it is good also as what gives rotational resistance to the outer ring | wheel 64 of the one-way clutch 60 using a magnetic attraction force. FIG. 10 is a configuration diagram showing an outline of a configuration of a resistance generation member 270 of a modified example. The resistance generation member 270 of the modified example includes an annular member 272 fixed to the unit case, and a permanent magnet 274 fixed to the inner peripheral surface of the annular member 272 with a predetermined distance from the outer ring 64 of the one-way clutch 60. Prepare. The outer ring 164 is made of a magnetic material. Four permanent magnets 274 are provided at equal angular intervals in the circumferential direction so as to surround the outer ring 64 of the one-way clutch 60. The resistance generating member 270 of this modification can easily adjust the holding force in one direction of the door 2 by adjusting the distance between the permanent magnet 274 and the outer ring 64. Of course, the number of permanent magnets 274 may be any number.

  The vehicle door opening and closing device 10 according to the embodiment includes a compression coil spring 22 that applies a biasing force in a direction in which the support member 20 is extended. In contrast, a damper mechanism (for example, a gas type or an oil type) may be provided instead of the compression coil spring 22, or the compression coil spring 22 and the damper mechanism may be used in combination. Further, the compression coil spring 22 and the damper mechanism may not be provided. In this case, the holding force (resistance force) necessary for holding the door 2 against the door self-weight moment acting in the closing direction around the fulcrum may be supplemented by the rotational resistance of the resistance generating members 70, 170, 270. Good.

  In the vehicle door opening and closing device 10 of the embodiment, the two support members 20 and 20B that support the opening and closing of the door 2 are provided. However, the number of support members may be one, or three or more. Also good.

  In the vehicle door opening and closing device 10 of the embodiment, the drive unit 50 is built in the first housing 30 having a small diameter out of the first housing 30 and the second housing 40. The unit 50 may be incorporated.

  In the present embodiment, the vehicle door opening and closing device of the present invention is applied to the device that opens and closes 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 first housing 30 corresponds to the “first housing”, the second housing 40 corresponds to the “second housing”, the support member 20 corresponds to the “support member”, the spindle 32 and the spindle nut 44. Corresponds to the “rotation / linear motion conversion mechanism”, the motor 52 corresponds to the “motor”, the resistance generating members 70, 170, 270 correspond to the “rotation resistance applying means”, and the one-way clutch 60 is the “one-way clutch”. Is equivalent to. Further, the reduction gear 54 corresponds to a “reduction gear”. Further, the friction piece 174 corresponds to a “friction member”, and the coil spring 176 corresponds to a “biasing means”. Further, the friction ring 74 corresponds to an “elastic member”.

  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 column of means for solving the problems should be made based on the description of the column, and the examples are those of the invention described in the column of means for solving the problems. It is only a specific 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 Car body, 2 Door, 4 Hinge, 10 Door opening / closing device for vehicles, 20 and 20B Support member, 22 Compression coil spring, 30 1st housing, 31 Socket, 32 Spindle, 34 Stopper, 36 Bearing, 40 2nd housing, 41 Socket, 42 Spindle guide, 42a Reduced diameter part, 44 Spindle nut, 50 Drive unit, 51 Bearing, 52 Motor, 52a Rotating shaft, 53 Motor case, 54 Reduction gear, 55 Gear case, 55a Locking claw, 56 Unit case, 56a Locking hole, 58 fixing bracket, 60 one-way clutch, 62 inner ring, 64 outer ring, 66 torque transmission member, 70, 170, 270 resistance generating member, 72, 172, 272 annular member, 74 friction ring, 174 friction piece, 176 coil Spring, 274 Permanent magnet.

Claims (9)

A cylindrical first housing and a second housing interposed between the vehicle body and the door are provided, and the door can be opened and closed with expansion and contraction due to relative movement in the axial direction of the first housing and the second housing. A vehicle door opening and closing device including a supporting member for supporting,
The support member is
A rotation / linear motion conversion mechanism having a spindle rotatably supported in the first housing and capable of mutually converting the rotational movement of the spindle and the relative movement of the first housing and the second housing;
A motor for rotationally driving the spindle;
Rotation resistance applying means for applying rotation resistance;
When rotational torque in one direction acts on the spindle, the rotational torque is transmitted to the rotational resistance applying means, and when rotational torque in the reverse direction acts on the spindle, the rotational torque is transmitted to the rotational resistance applying means. A one-way clutch to shut off;
A vehicle door opening and closing device comprising: The vehicle door opening and closing device according to claim 1,
The rotation shaft of the motor is connected to the spindle via a reduction gear,
The one-way clutch is interposed between the reduction gear and the spindle. The vehicle door opening and closing device according to claim 1,
The rotation shaft of the motor is connected to the spindle via a reduction gear,
The one-way clutch is interposed between the motor and the reduction gear. The vehicle door opening and closing device according to any one of claims 1 to 3,
The spindle is connected to an inner ring of the one-way clutch;
The vehicular door opening and closing device, wherein the rotation resistance applying means applies rotation resistance to an outer ring of the one-way clutch. The vehicle door opening and closing device according to any one of claims 1 to 4,
The vehicle door opening / closing apparatus according to claim 1, wherein the rotation resistance applying means applies rotation resistance by contact friction. The vehicle door opening and closing device according to claim 5,
The rotation resistance applying means includes a friction member and an urging means for urging the friction member in a direction in contact with the outer ring of the one-way clutch. The vehicle door opening and closing device according to claim 5,
The vehicle door opening / closing apparatus according to claim 1, wherein the rotation resistance applying means includes an elastic member that contacts an outer ring of the one-way clutch. The vehicle door opening and closing device according to any one of claims 1 to 4,
The vehicle door opening and closing device, wherein the rotation resistance applying means applies rotation resistance by a magnetic attraction force. The vehicle door opening and closing device according to any one of claims 1 to 8,
The door is a flip-up type door whose upper end portion is rotatably supported with respect to the vehicle body.

Images