JP2023046861A - Vehicle door support device - Google Patents

Abstract

To provide a vehicle door support device with a brake member whose stability and durability are improved.SOLUTION: A vehicle door support device 10 includes a first support member 15A and a second support member 15B which have a first connection end 20a connected to a vehicle body 2 and a second connection end 25a connected to a door 3, respectively and which hold the door 3 in its open position relative to the vehicle body 2. Each of these members includes a cylindrical housing portion 21 having a first connecting end 20a, a cylindrical cover portion 22 connected to the opposite side of an end 21a of the housing portion 21, a cylindrical movable member 25 which has an end 21b serving as a second connecting end 25a, whose opposite side of the end 21b is housed within the cover portion 22, and which is movable in the axial direction relative to the cover portion 22, a spindle 34 disposed in the movable member 25, a conversion mechanism 37 which causes the spindle 34 to rotate by relative movement of the movable member 25 relative to the cover portion 22, and a brake member 50A arranged to have a fixed axial position relative to the spindle 34 and providing rotational resistance to the spindle 34.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vehicle door support device.

A door of a vehicle is provided with a vehicle door support device that opens and closes the door by axially expanding and contracting the door. 2. Description of the Related Art A vehicle door support device may be provided with a brake mechanism in order to keep the door open or to prevent the door from opening and closing rapidly.

A vehicle door support device described in Patent Document 1 includes a fixed shaft extending in the axial direction, and a movable member arranged to cover the fixed shaft and extending and contracting with respect to the fixed shaft. An elastic member (brake member) that provides resistance to expansion and contraction of the movable member is provided between the fixed shaft and the movable member. Specifically, the elastic member is fixed to the axial end of the fixed shaft so as to be in contact with the inner surface of the movable member. When the movable member expands and contracts, a frictional force is generated between the elastic member and the inner surface of the movable member, and resistance is generated against sliding of the movable member in the linear motion direction.

Japanese Patent Application Laid-Open No. 2021-017798

In the vehicle door support device described in Patent Literature 1, resistance is given to the sliding of the movable member in the linear motion direction. contact over substantially the entire length of That is, the elastic member contacts a wide range of the movable member. Therefore, there is a possibility that the position of the elastic member may shift due to the expansion and contraction of the movable member, and the elastic member is likely to wear out. In other words, the stability and durability of the elastic member are poor.

SUMMARY OF THE INVENTION The present invention provides a vehicle door support device in which the stability and durability of the brake member are improved.

The present invention has a first connecting end connected to a vehicle body and a second connecting end connected to a door, respectively. a support member, wherein each of the first support member and the second support member is a cylindrical accommodating portion having an end portion that constitutes one of the first connection end and the second connection end; , a cylindrical cover portion continuing on the side opposite to the end portion of the housing portion, and an end portion constituting the other of the first connection end and the second connection end, and the end portion and a cylindrical movable member whose opposite side is accommodated in the cover portion and is axially movable relative to the cover portion; a spindle arranged in the movable member; and the movable member with respect to the cover portion. and a brake member disposed so as to fix the relative position in the axial direction with the spindle and providing rotational resistance to the spindle. A support device is provided.

According to the present invention, the spindle rotates as the movable member moves relative to the cover as the door is opened and closed. At that time, resistance is applied to the rotation of the spindle via the brake member. As a result, the opening/closing speed of the door becomes slow, and sudden opening/closing of the door can be prevented. Also, the brake member is arranged in a fixed axial position relative to the spindle. In other words, the position of the brake member with respect to the spindle is not displaced along the axial direction of the spindle, unlike the case of providing resistance to the linear motion of the spindle. Therefore, compared with the case where the relative position between the spindle and the brake member is displaced, the displacement and wear of the brake member can be suppressed, and the stability and durability of the brake member can be improved.

According to the invention, the stability and durability of the braking member can be improved.

1 is a perspective view showing a vehicle using the vehicle door support device of the present invention; FIG. FIG. 2 is a cross-sectional view of the driven support member of the first embodiment; Sectional drawing of the electric support member of 1st Embodiment. The perspective view of a brake member. The side view of a brake member. FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 5; FIG. 6 is a cross-sectional view on line VII-VII of FIG. 5; The side view which shows the modification of a brake member. Sectional drawing in line IX-IX of FIG. 2 which shows the modification of 1st Embodiment. Sectional drawing similar to FIG. 9 which shows the modification of 1st Embodiment. Sectional drawing of the driven support member of 2nd Embodiment.

(First embodiment)
FIG. 1 shows a vehicle 1 in which a door support device (vehicle door support device) 10 according to a first embodiment of the present invention is used. Referring to FIG. 1, the door support device 10 includes cylindrical support members 15A and 15B, which are arranged between the vehicle body 2 and the back door (door) 3. As shown in FIG. The supporting member (first supporting member) 15A positioned on the left side of the vehicle 1 in FIG. ) 15B is an electric type that is electrically expanded and contracted. The support member 15A may be electrically driven and the support member 15B may be driven.

Also referring to FIG. 2, the support member 15A includes a first housing 20 and a second housing 25 coaxially with the axis L1. The first housing 20 has a connection end (first connection end) 20a that is connected to the vehicle body 2 as the base end of the support member 15A. The second housing 25 has a connecting end (second connecting end) 25a connected to the back door 3 as the tip of the support member 15A. The first housing 20 may be connected to the back door 3 and the second housing 25 may be connected to the vehicle body 2 . By advancing the second housing 25 with respect to the first housing 20 , the back door 3 is held at the open position with respect to the vehicle body 2 . By retracting the second housing 25 with respect to the first housing 20 , the back door 3 can be closed with respect to the vehicle body 2 .

Referring to FIG. 2 , the first housing 20 includes a cylindrical housing portion 21 and a cylindrical cover portion 22 connected to the housing portion 21 .

Inside the accommodating portion 21, a motor space 21c is provided in which an electric motor 70 (see FIG. 3), which will be described later, can be arranged. In this embodiment, an electric motor 70 (see FIG. 3), which will be described later, is not arranged in the motor space 21c of the support member 15A. The housing portion 21 has an end portion 21a and an end portion 21b opposite to the end portion 21a, and the end portion 21a is the connecting end 20a. The connection end 20a is open and closed by a shaft end member 23A. Between the end portion 21b and the motor space 21c, there is provided a cylindrical brake member space 21d in which a later-described brake member 50A is arranged. The motor space 21c and the brake member space 21d are separated by a holding wall 21d provided with a through hole 21e.

The cover portion 22 is threadedly connected to the end portion 21b of the housing portion 21 . In this embodiment, the outer diameter of the cover portion 22 is the same as the outer diameter of the housing portion 21 . Inside the cover portion 22, a second housing space 22a for retracting the second housing 25 and a spindle space 22c for retracting a spindle nut 38 and a push rod 39 are provided.

The second housing 25 is a cylindrical movable member arranged coaxially within the cover portion 22 and relatively movable with respect to the cover portion 22 in the direction of the axis L1. The outer diameter of the second housing 25 is smaller than the inner diameter of the first housing 20 and is accommodated within the first housing 20 . The second housing 25 has a connecting end 25a. The connecting end 25a is open and closed by a shaft end member 26. As shown in FIG. The axial end member 26 including the connection end 25a protrudes from the distal end portion 20b of the first housing 20 (cover portion 22) even when the second housing 25 is retracted toward the base end side with respect to the first housing 20. As shown in FIG.

15 A of support members are provided with the expansion-contraction mechanism 30. As shown in FIG.

The extension mechanism 30 includes a coil spring 32 that advances the second housing 25 with respect to the first housing 20, a spindle 34 that guides the movement (extension) of the second housing 25 with respect to the first housing 20, and a conversion mechanism 37. .

The coil spring 32 elastically biases the second housing 25 with respect to the first housing 20 (cover portion 22) in a direction to advance toward the tip side. The coil spring 32 is accommodated in the second housing 25 and in the second housing space 22a and arranged coaxially with the second housing 25 . The coil spring 32 has one end in contact with the first housing 20 and the other end in contact with the second housing 25 .

The spindle 34 is arranged coaxially with the axis L1 inside the second housing 25 and the cover portion 22 so as to extend along the axis L1. A base end portion 34 a of the spindle 34 protrudes from the cover portion 22 and is inserted into the housing portion 21 .

In this embodiment, the spindle 34 is cylindrical and has a spiral portion 34b and a support portion 34c. A spiral groove is provided in the spiral portion 34b. The support portion 34c is arranged closer to the base end portion 34a than the spiral portion 34b and does not have a spiral groove. The spindle 34 is rotatably supported by a bearing 35 arranged inside the cover portion 22 via a support portion 34c. A base end portion 34a of the spindle 34c is inserted into the motor space 21c through the through hole 21e. A brake member 50A, which will be described later, is arranged on the support portion 34c so as to provide rotational resistance within the cover portion 22. As shown in FIG.

The conversion mechanism 37 rotates the spindle 34 about the axis L<b>1 by relative movement of the second housing 25 with respect to the cover portion 22 . In other words, the conversion mechanism 37 converts the linear motion of the second housing 25 relative to the cover portion 22 into rotational motion of the spindle 34 . Conversion mechanism 37 includes spindle nut 38 , push rod 39 and guide tube 40 . They are arranged between the coil spring 32 and the spindle 34 in the radial direction of the second housing 25 . Specifically, a guide tube 40 is arranged inside the coil spring 32 , a push rod 39 is accommodated inside the guide tube 40 , and a spindle nut 38 is fixed to one end of the push rod 39 .

The spindle nut 38 and push rod 39 are engaged with the guide tube 40 and first housing 20 so as not to rotate relative to each other. Therefore, when the back door 3 is opened and closed, the linear motion of the spindle nut 38 relative to the guide tube 40 is converted into rotational motion of the spindle 34 . That is, as the back door 3 is opened and closed, the spindle 34 rotates while its position in the direction of the axis L1 is fixed.

A brake member 50A is arranged on the support portion 34c of the spindle 34 so as to surround the spindle 34 coaxially with the axis L1. Specifically, the brake member 50A is arranged in the brake member space 21d, and its position in the direction of the axis L1 is fixed by a holding member 46 arranged between the bearing 35 and the brake member space 21d. In other words, one end of the brake member 50A contacts the holding wall 21d and the other end of the brake member 50A contacts the holding member 46, thereby fixing the position of the brake member 50A in the direction of the axis L1. That is, the brake member 50A is arranged so that the relative position of the spindle 34 in the direction of the axis L1 is fixed. The holding member 46 is fixed by being sandwiched between the housing portion 21 and the cover portion 22 via the bearings 35 . Further, although the details will be described later, the brake member 50A is cylindrical and has a slit 55e (see FIG. 5) along the direction of the axis L1. The brake member 50A is non-rotatably fixed to the accommodating portion 21 by being pressed radially outward against the accommodating portion 21 by the supporting portion 34c of the spindle 34. As shown in FIG. Specifically, the outer diameter of the brake member 50A is smaller than the diameter of the brake member space 21d. It is press-contacted to the accommodating portion 21 .

Referring to FIG. 4, the brake member 50A includes a body portion 55 and a resin layer 60. As shown in FIG.

Referring also to FIGS. 5 to 7, the body portion 55 is made of metal (for example, stainless steel) and has a cylindrical shape centered on the central axis L2. Further, the main body portion 55 is provided with four contact portions 55a, 55b, 55c, and 55d at approximately equal angles along the circumferential direction of the central axis L2. The contact portions 55a to 55d are provided so as to be recessed toward the central axis L2. Further, the body portion 55 includes a slit 55e and openings 55f, 55g, and 55h. The slit 55e is provided with a width h between the contact portions 55a and 55b along the central axis L2 and over the entire length of the body portion 55. As shown in FIG. The openings 55f to 55h are provided with a width h along the circumferential direction of the central axis L2. That is, the slit 55e and the openings 55f to 55h are provided with the same width h. The opening 55f is provided between the contact portions 55a and 55b. The opening 55g is provided between the contact portions 55b and 55c. The opening 55h is provided between the contact portions 55c and 55d. In the support member 15A of this embodiment, two pairs of contact portions 55a-55d are provided along the central axis L2, and one pair of openings 55f-55h are provided across the two pairs of contact portions 55a-55d. Two sets of openings 55f to 55h may be provided along the central axis L2. That is, one set of openings 55f to 55h may be provided for one set of contact portions 55a to 55d. Further, the main body portion 55 may be divided vertically with respect to the central axis L2. That is, two brake members each having a pair of contact portions 55a-55d and openings 55f-55h may be arranged in series along the central axis L2. Alternatively, the body portion 55 may be divided along the central axis L2. That is, for example, a slit 55e may be provided instead of the opening 55g.

The resin layer 60 is made of resin (for example, fluororesin) and is provided on the entire inner surface of the body portion 55 . The resin layer 60 may be provided only on the inner surfaces of the contact portions 55a to 55d.

The brake member 50A contacts the support portion 34c of the spindle 34 via the resin layer 60 provided on the contact portions 55a to 55d. Therefore, the brake member 50A gives rotational resistance to the spindle 34 via the resin layer 60 provided on the contact portions 55a to 55d. In other words, the rotation of the spindle 34 is suppressed by the brake member 50A.

Referring to FIG. 8, openings 55f-55h may have enlarged portions 55j that smoothly partially increase in width along central axis L2. Preferably, the enlarged portion 55j is aligned with the contact portions 55a to 55d in the central axis L2 direction.

Instead of the resin layer 60 made of resin, an elastic body such as rubber may be arranged on the inner surface of the brake member 50A. Further, the body portion 55 may be made of an elastic body such as rubber. In this case, the brake member 50A does not include the resin layer 60, but includes only the main body portion 55. The main body portion 55 made of an elastic body directly contacts the support portion 34c of the spindle 34 and gives resistance to the rotation of the spindle 34.

Also, the brake member 50A may be a leaf spring. In this case, a leaf spring is fixed in the brake member space 21d, and the portion elastically deforming with respect to the fixed portion comes into contact with the support portion 34c of the spindle 34, thereby giving resistance to the rotation of the spindle 34. .

The configuration of the support member 15B will be described with reference to FIG. The support member 15B has an electric motor 70 and a gear mechanism 44 . Further, the connection end 20a is closed by a shaft end member 23B different from the shaft end member 23A. Since the configuration other than these is the same as that of the support member 15A, the description may be omitted.

As described above, the support member 15B is of an electric type that can be expanded and contracted by being driven by the electric motor 70 . Therefore, in this embodiment, the back door 3 can be automatically opened and closed.

The electric motor 70 is a driving means capable of forward and reverse rotation, and is electrically connected to an ECU (Electronic Control Unit) of the vehicle 1 . The electric motor 70 is arranged in the motor space 21c and has an output shaft 70a protruding toward the spindle 34 . The output shaft 70 a is connected to the base end portion 34 a of the spindle 34 via the gear mechanism 44 .

The gear mechanism 44 includes a plurality of gears 45A, 45B, 45C, 45D. As the output shaft 70a rotates, the gears 45A to 45D rotate and the spindle 34 rotates. Rotational motion of the spindle 34 is converted into relative linear motion of the spindle nut 38 with respect to the guide tube 40 via the conversion mechanism 37 . This causes the spindle nut 38 and push rod 39 to move axially. Further, the movement of the push rod 39 causes the second housing 25 to move relative to the first housing 20 .

In the support member 15B, the accommodating portion 21 does not include the brake member space 21d (see FIG. 2), and the cover portion 22 is provided between the spindle space 22c and the bearing 35 to form a cylindrical brake member space 22b. Prepare. The spindle space 22c and the brake member space 22b are separated by a holding wall 22e having a through hole 22d. A support portion 34c of the spindle 34 is inserted into the through hole 22d.

A brake member 50B is arranged in the brake member space 22b and fixed to the cover portion 22 . Specifically, the brake member 50B arranged in the brake member space 22b is fixed in position in the direction of the axis L1 by a holding member 47 arranged between the bearing 35 and the brake member space 22b. In other words, one end of the brake member 50B contacts the holding wall 22e and the other end of the brake member 50B contacts the holding member 47, thereby fixing the position of the brake member 50B in the direction of the axis L1. The holding member 47 is fixed by being sandwiched between the housing portion 21 and the cover portion 22 via the bearings 35 . Since the configuration of the brake member 50B is the same as that of the brake member 50A (see FIG. 4), detailed illustration is omitted. Prepare. Similarly to the brake member 50A, the brake member 50B is non-rotatably fixed to the cover portion 22 by being pressed against the cover portion 22 radially outward by the support portion 34c of the spindle 34. As shown in FIG.

The operation of the support members 15A and 15B in this embodiment when the back door 3 is opened and closed will be described below.

The second housing 25 is retracted with respect to the first housing 20 when the back door 3 is closed with respect to the vehicle body 2 . In this state, the coil spring 32 is compressed and the spindle nut 38 is positioned near the base end 34a of the spindle 34. As shown in FIG.

When an opening operation is performed to open the back door 3, the electric motor 70 of the support member 15B is driven to open by a command from the ECU and rotates forward. When the electric motor 70 rotates forward, the spindle 34 rotates via the conversion mechanism 37 , and the second housing 25 advances with respect to the cover portion 22 . At this time, the elastic force of the coil spring 32 acts in the direction of advancing the second housing 25 , and the weight of the back door 3 acts in the direction of retracting the second housing 25 . Also, the frictional force of the brake members 50A and 50B acts to restrain the advance of the second housing 25 . That is, the sum of the driving force of the electric motor 70 in the normal direction and the elastic force of the coil spring 32 becomes larger than the sum of the weight of the back door 3 and the frictional force of the brake members 50A and 50B. , the second housing 25 advances with respect to the cover portion 22 . When the back door 3 rotates to the open position with respect to the vehicle body 2, the elastic force of the coil spring 32, the frictional force of the gears 45A to 45D, the cogging torque of the electric motor 70, and the frictional forces of the brake members 50A and 50B cause the back door to move backward. Door 3 is held.

When the closing operation is performed to close the back door 3, the electric motor 70 of the support member 15B is driven to close by a command from the ECU, and reverses. When the electric motor 70 reverses, the spindle 34 rotates via the conversion mechanism 37 and the second housing 25 retreats with respect to the cover portion 22 . At this time, the elastic force of the coil spring 32 acts in the direction of advancing the second housing 25 , and the weight of the back door 3 acts in the direction of retracting the second housing 25 . In addition, the frictional force of the brake members 50A and 50B acts to restrain the second housing 25 from retreating. In other words, the combined force of the driving force in the reverse direction of the electric motor 70 and the weight of the back door 3 becomes greater than the combined force of the elastic force of the coil spring 32 and the frictional force of the brake members 50A and 50B. The second housing 25 retreats with respect to the cover portion 22 .

The brake members 50A and 50B act to restrain the movement of the back door 3 both when the back door 3 is opened and when it is closed. Therefore, even if the electric motor 70 fails and the balance of the force acting on the back door 3 is lost, the brake members 50A and 50B suppress the movement of the back door 3, and the back door 3 is opened and closed rapidly. to prevent

According to the present embodiment, the spindle 34 rotates as the second housing 25 moves relative to the cover portion 22 as the back door 3 is opened and closed. At that time, resistance is applied to the rotation of the spindle 34 via the brake members 50A and 50B. Therefore, the opening/closing speed of the back door 3 becomes gentle, and the sudden opening/closing of the back door 3 can be prevented. Further, the brake members 50A and 50B are arranged so that their relative positions in the direction of the axis L1 with respect to the spindle 34 are fixed. In other words, the positions of the brake members 50A and 50B with respect to the spindle 34 are not displaced along the axis L1 direction of the spindle 34, unlike the case where resistance is given to the linear movement of the spindle 34. Therefore, compared with the case where the relative positions of the spindle 34 and the brake members 50A and 50B are displaced, displacement and wear of the brake members 50A and 50B are suppressed, and the stability and durability of the brake members 50A and 50B are improved. can.

The coil spring 32 acts to support part or all of the weight of the back door 3 when the back door 3 is opened and closed. Therefore, the force required to open and close the back door 3 can be reduced. Therefore, the back door 3 can be easily opened and closed. In this embodiment, the electric motor 70 opens and closes the back door 3 . Therefore, the output of the electric motor 70 can be reduced by providing the coil spring 32 .

Further, since the electric motor 70 is provided, the back door 3 can be opened and closed automatically. Therefore, the back door 3 can be easily opened and closed.

Furthermore, since the driven support member 15A and the electric support member 15B share the same basic components, the manufacturing cost can be reduced compared to using different parts. In addition, it is easy to adjust the balance when controlling the opening and closing of the back door 3 .

In the support member 15A, the brake member 50A is arranged in the brake member space 21b. Since the electric motor 70 is not arranged in the motor space 21c of the support member 15A, the length of the brake member 50A can be set arbitrarily. Therefore, the frictional force applied to the spindle 34 by the brake member 50A can be arbitrarily set.

Further, the brake members 50A and 50B apply resistance to the spindle 34 through the resin layer 60. As shown in FIG. Therefore, durability can be improved compared to the case where resistance is applied to the spindle 34 via an elastic body such as rubber.

Further, the brake members 50A and 50B are provided with a plurality of contact portions 55a to 55d along the circumferential direction of the central axis L2. Therefore, the frictional force with respect to the spindle 34 can be improved. In addition, since the contact portions 55a to 55d are provided, the spindle 34 can be easily inserted into the brake members 50A and 50B compared to the case where the spindle 34 is surrounded by the entire inner surface of the body portion 55, and the frictional force can be arbitrarily set. can be easily set to

The door support device 10 may include a driven support member 15A instead of the electric support member 15B. That is, the door support device 10 may include two sets of driven support members 15A. In this case, the back door 3 is opened and closed manually, but the manufacturing cost can be reduced. Further, since the supporting members 15A and 15B have the same structure, balance adjustment for supporting the load of the back door 3 evenly can be easily performed.

Further, the door support device 10 may include an electric support member 15B instead of the driven support member 15A. That is, the door support device 10 may include two sets of electrically driven support members 15B. In this case, since the supporting members 15A and 15B have the same structure, balance adjustment for supporting the load of the back door 3 evenly can be easily performed.

Grease may be applied between the support portion 34c of the spindle 34 and the contact portions 55a to 55d. As a result, deterioration of the brake member 50A during use and changes in frictional resistance due to temperature can be prevented, and stable rotation resistance can be obtained.

Referring to FIG. 9, as a modification, the brake member 50A may include a flange 55i protruding radially outward to face the slit 55e. In this case, the accommodating portion 21 is provided with a groove portion 21g aligned with the flange 55i and extending in the direction of the axis L1 (see FIG. 2). By fitting the flange 55i into the groove 21g, the posture of the brake member 50A around the central axis L2 can be maintained, and the rotation of the brake member 50A together with the spindle 34 can be reliably prevented.

Referring to FIG. 10, as a further modified example, the accommodating portion 21 may be provided with a convex portion 21h. The convex portion 21h is convex toward the brake member space 21d. By fitting the convex portion 21h into the slit 55e, the posture of the brake member 50A around the central axis L2 can be maintained, and the rotation of the brake member 50A together with the spindle 34 can be reliably prevented.
(Second embodiment)
Referring to FIG. 11, the configuration of the door support device 10 according to the second embodiment differs from that of the first embodiment in the following points. The rest of the configuration of the second embodiment is the same as that of the first embodiment, and the same reference numerals are given to the same or similar elements as those of the first embodiment.

In the second embodiment, the door support device 10 includes a support member 15C instead of the support member 15A. 15 C of support members are provided with the brake member 50B in addition to the structure of 15 A of support members.

In the support member 15</b>C, the cover portion 22 has a brake member space 22 b between the second housing space 22 a and the bearing 35 . A brake member 50B is arranged in the brake member space 22b and fixed to the cover portion 22 .

In the door support device 10 according to the second embodiment, since the two brake members 50A and 50B are arranged on the support member 15C, the frictional force with respect to the spindle 34 increases, and the suppression of the rotation of the spindle 34 can be increased. Therefore, the degree of freedom in adjusting the balance of the door support device 10 can be improved, for example, the weight of the back door 3 can be increased.

1 vehicle 2 vehicle body 3 back door (door)
10 door support device (vehicle door support device)
15A, 15C support member (first support member)
15B support member (second support member)
20 first housing 20a connection end (first connection end)
20b tip portion 21 accommodation portion 21a, 21b end portion 21c motor space 21d brake member space 21e through hole 21f holding wall 21g groove portion 21h convex portion 22 cover portion 22a second housing space 22b brake member space 22c spindle space 22d Through hole 22e Holding wall 23A, 23B Shaft end member 25 Second housing 25a Connection end (second connection end)
26 Shaft end member 30 Expansion mechanism 32 Coil spring 34 Spindle 34a Base end 34b Spiral part 34c Support part 35 Bearing 37 Conversion mechanism 38 Spindle nut 39 Push rod 40 Guide tube 44 Gear mechanism 45A to 45D Gear 46 Holding member 47 Holding member 50A , 50B brake member 55 body portion 55a to 55d contact portion 55e slit 55f to 55h opening 55i flange 55j enlarged portion 60 resin layer 70 electric motor 70a output shaft

Claims (8)

a first support member and a second support member each having a first connection end connected to the vehicle body and a second connection end connected to the door, and holding the door in an open position with respect to the vehicle body; prepared,
Each of the first support member and the second support member
a cylindrical accommodating portion having an end portion that constitutes one of the first connection end and the second connection end;
a cylindrical cover portion that continues on the side opposite to the end portion of the accommodating portion;
It has an end forming the other of the first connection end and the second connection end, and the side opposite to this end is accommodated in the cover portion and is axially relative to the cover portion. a cylindrical movable member that can move to
a spindle disposed within the movable member;
a conversion mechanism that rotates the spindle by relative movement of the movable member with respect to the cover;
A vehicle door support device, comprising: a brake member disposed so as to be fixed relative to the spindle in the axial direction, and providing rotational resistance to the spindle. 2. The vehicle door support apparatus according to claim 1, wherein at least one of said first support member and said second support member comprises an electric motor connected to said spindle for rotating said spindle. 2. At least one of said first support member and said second support member includes a coil spring disposed within said movable member and biasing said movable member in a direction of advancing said movable member relative to said cover portion. 3. The vehicle door support device according to 2. 4. The vehicle door support device according to any one of claims 1 to 3, wherein said brake member is fixedly arranged in said accommodating portion. The vehicle door support device according to any one of claims 1 to 4, wherein the brake member is fixedly arranged on the cover portion. The brake member
a cylindrical main body made of metal and surrounding the spindle;
A resin layer provided on the inner surface of the main body,
6. The vehicle according to any one of claims 1 to 5, wherein the body portion is provided with a contact portion that is recessed toward the central axis of the body portion and contacts the spindle via the resin layer. door support device. The vehicle door support device according to claim 6, wherein a plurality of said contact portions are provided along the circumferential direction of said central axis. a support member having a first connection end connected to the vehicle body and a second connection end connected to the door, and holding the door in an open position with respect to the vehicle body;
The support member is
a cylindrical accommodating portion having an end portion that constitutes one of the first connection end and the second connection end;
a cylindrical cover portion that continues on the side opposite to the end portion of the accommodating portion;
It has an end portion forming the other of the first connection end and the second connection end, and the side opposite to this end portion is accommodated in the cover portion and is axially relative to the cover portion. a cylindrical movable member that can move to
a spindle disposed within the movable member;
a conversion mechanism that rotates the spindle by relative movement of the movable member with respect to the cover;
A vehicle door support device, comprising: a brake member disposed so as to be fixed in position relative to the spindle in the axial direction, and providing rotational resistance to the spindle.

Images