Vehicle door support member

Abstract

A vehicle door support member 6 includes: a cylindrical storage part 12 that protrudes from a connection part 11; a cylindrical extension part 13 that is coaxially connected to the storage part 12; a cylindrical movable member 20 that is movable relative to the extension part 13; a spindle 25 that is rotatably supported in the extension part 13; a spindle nut 27 that is screwed to the spindle 25 and coupled to the movable member 20; a coil spring 28 that urges the movable member 20 in a direction to advance from the extension part 13; and a brake 30 that applies rotational resistance to the spindle 25. The brake 30 is stored in the storage part 12 and sandwiched between the extension part 13 and the connection part 11.

Description

Vehicle door support member

[0001] The present invention relates to a vehicle door support member.

[0002] Patent Document 1 discloses a vehicle door support member that is provided between the vehicle body and the back door of a vehicle and supports the door so as to be openable and closable with respect to the vehicle body. The support member includes a fixed housing, a movable housing, and a coil spring that advances the movable housing from the fixed housing. The support member also includes a spindle attached to the fixed housing and a spindle nut attached to the movable housing.

[0003] Patent Document 1 discloses an active support member and a passive support member. The active support member includes a motor that rotates the spindle, and the movable housing moves actively forward and backward with respect to the fixed housing. The passive support member includes a brake (magnet brake) that imparts rotational resistance to the spindle instead of the motor, and the movable housing moves passively forward and backward with respect to the fixed housing due to the rotation of the spindle accompanying the opening and closing of the door.

[0004] The motor and the brake are housed in the housing portion of the fixed housing having the same configuration. Since the axial dimension of the brake is smaller than the axial dimension of the motor, for the passive support member, a spacer is housed in the housing portion together with the brake.

[0005] Patent No. 7252058

[0006] In the support member of Patent Document 1, since it is necessary to prepare a dedicated spacer for housing the brake, there is room for improvement in reducing the number of parts.

[0007] An object of the present invention is to reduce the number of parts in a vehicle door support member provided with a brake.

[0008] The present invention provides a vehicle door support member comprising: a connecting portion connected to one of the vehicle body and the door; a cylindrical housing portion projecting from the connecting portion to the other side of the vehicle body and the door; a cylindrical extension portion coaxially connected to the end of the housing portion opposite to the connecting portion; a cylindrical movable member having a connecting end connected to the other side of the vehicle body and the door, the end opposite to the connecting end housed within the extension portion, and movable relative to the extension portion in the axial direction; a spindle having a connecting shaft portion extending within the housing portion and rotatably supported within the extension portion; a spindle nut screwed onto the spindle and connected to the movable member; a coil spring biasing the movable member in a direction toward advancing out of the extension portion; and a brake connected to the connecting shaft portion and applying rotational resistance to the spindle when the movable member moves within the extension portion, wherein the brake is housed within the housing portion and sandwiched between the extension portion and the connecting portion.

[0009] The brake, which applies rotational resistance to the spindle when the movable member moves within the extension, is housed within the housing and sandwiched between the extension and the connecting portion. In other words, in this embodiment, no positioning spacer is used to house the brake within the housing. Therefore, the number of parts in the vehicle door support member can be reduced.

[0010] This invention makes it possible to reduce the number of parts in a vehicle door support member equipped with a brake.

[0011] A perspective view of a vehicle equipped with a vehicle door support member according to an embodiment of the present invention. A longitudinal cross-sectional view of a passive vehicle door support member according to the first embodiment of the present invention. An exploded perspective view of the vehicle door support member of Figure 2. An upper exploded perspective view of the base end portion of the vehicle door support member of Figure 2. A lower exploded perspective view of the base end portion of the vehicle door support member of Figure 2. A longitudinal cross-sectional view of an active vehicle door support member according to the second embodiment of the present invention.

[0012] Embodiments of the present invention will be described below with reference to the drawings.

[0013] The vehicle 1 shown in Figure 1 is equipped with a vehicle door support device 5 that can use vehicle door support members 6A and 6B (see Figures 2 and 6) according to the first and second embodiments of the present invention. Both the vehicle door support members 6A and 6B (see Figures 2 and 6) of the first and second embodiments described later are equipped with a brake 30, but do not have a spacer to support the brake 30. In the following description, reference numeral 6 may be used to comprehensively refer to vehicle door support members including both vehicle door support members 6A and 6B. Also, in the following description, vehicle door support members will be simply referred to as support members, and vehicle door support devices will be simply referred to as support devices.

[0014] Continuing to refer to Figure 1, the support device 5 comprises a pair of support members 6. Each support member 6 has one end connected to the vehicle body 2 and the other end connected to the back door (door) 3. In the passive type, each support member 6 extends and retracts in accordance with the opening and closing of the back door 3, and in the active type, it extends and retracts driven by a motor. In a typical support device 5, one of the pair of support members 6 is the passive support member 6A of the first embodiment (see Figure 2), and the other is the active support member 6B of the second embodiment (see Figure 6). However, both of the pair of support members 6 may be the support member 6A of the first embodiment (see Figure 2). Also, both of the pair of support members 6 may be the support member 6B of the second embodiment (see Figure 6). Furthermore, one of the pair of support members 6 may be either the support members 6A or 6B of the first and second embodiments (see Figures 2 and 6), and the other may be a support member other than the support members 6A or 6B of the first and second embodiments. For example, support members other than support members 6A and 6B are support members that support the brake 30 with spacers.

[0015] In the following explanation, the terms "base end" and "base end side" may be used to refer to the end of the support member 6 that is connected to the vehicle body 2. Additionally, the terms "end" and "end side" may be used to refer to the end of the support member 6 that is connected to the back door 3.

[0016] (First Embodiment) The configuration of the support member 6A according to the first embodiment will be described in detail below.

[0017] Referring to Figures 2 and 3, the support member 6A is generally a slender rod shape and supports the back door 3 in the open position relative to the vehicle body 2 shown in Figure 1. The support member 6A comprises a cylindrical fixed housing 10 and a cylindrical movable housing (movable member) 20 that is thinner than the fixed housing 10. The movable housing 20 moves back and forth relative to the fixed housing 10. Figure 2 shows the movable housing 20 in its most protruding state relative to the fixed housing 10. The support member 6A includes a spindle 25, a spindle nut 27, and a coil spring 28 inside.

[0018] The fixed housing 10 is connected to the vehicle body 2 (see Figure 1) via a connecting member (connecting part) 11. The connecting member 11 is made up of a ball socket that can be connected in such a way that it is allowed to swing relative to the vehicle body 2 (see Figure 1). The fixed housing 10 may also be connected to the back door 3 (see Figure 1) via the connecting member 11.

[0019] The fixed housing 10 comprises a cylindrical housing portion 12 and a cylindrical extension portion 13 coaxially connected to the end 12b of the housing portion 12. The extension portion 13 is composed of a cover portion 14 and a guide portion 15, both of which are cylindrical with openings at both ends.

[0020] Referring to Figures 2 to 5, the housing portion 12 is integrally provided with the connecting member 11 and protrudes from the connecting member 11 toward the back door 3 (see Figure 1). The base end 12a of the housing portion 12 is closed by the formation of the connecting member 11. The end portion 12b of the housing portion 12 is open. The portion of the housing portion 12 adjacent to the connecting member 11 on the base end 12a side constitutes a retaining portion 12c that holds the brake 30, which will be described later, by its inner surface. The portion of the housing portion 12 toward the end portion 12b constitutes a mounting recess 12d for attaching the guide portion 15. The opening area of ​​the mounting recess 12d is larger than the opening area of ​​the retaining portion 12c.

[0021] Referring to Figures 2 and 3, the cover portion 14 is configured to house the base end of the coil spring 28. The cover portion 14 is coaxially connected to the end 12b of the housing portion 12 and surrounds the outer circumference of the base end of the coil spring 28. The base end 14a and the end 14b of the cover portion 14 are open. Of these, the base end 14a of the cover portion 14 is provided with an annular support portion 14c that protrudes radially inward to support the base end of the coil spring 28. The biasing force of the coil spring 28 presses the support portion 14c against the end 12b of the housing portion 12 and the mounting portion 15d of the guide portion 15, which will be described later.

[0022] The guide portion 15 is configured to guide the spindle nut 27. The guide portion 15 is cylindrical with its base end 15a and end 15b open, and is positioned inside the coil spring 28 within the cover portion 14. Although the guide portion 15 could be molded as a double cylinder with the cover portion 14 as an integral structure, it is deliberately molded separately as a single cylinder.

[0023] The guide portion 15 houses most (or part) of the end of the spindle 25 and the spindle nut 27. Furthermore, multiple guide grooves 15c are provided at circumferential intervals on the inner circumference of the guide portion 15, extending in the direction of the axis L of the support member 6A (axial direction). The guide grooves 15c prevent relative rotation of the spindle nut 27 with respect to the guide portion 15, while guiding the spindle nut 27 to move axially forward and backward relative to the guide portion 15.

[0024] The base end 15a of the guide portion 15 is provided with a mounting portion 15d that protrudes radially outward. The mounting portion 15d can be fitted into the mounting recess 12d of the housing portion 12 and is attached in a way that prevents it from being removed, for example by laser welding. The mounting portion 15d is provided with a recess 15e for arranging a bearing 26 that rotatably supports the spindle 25. The recess 15e is recessed from the base end 15a of the guide portion 15 towards the end 15b.

[0025] Continuing to refer to Figures 2 and 3, the movable housing 20 is connected to the back door 3 (see Figure 1) via a connecting member 21. The connecting member 21 is made up of a ball socket that can be connected in such a way that it is allowed to swing relative to the back door 3 (see Figure 1). The movable housing 20 may also be connected to the vehicle body 2 (see Figure 1) via the connecting member 21. The movable housing 20 is axially relative to the extension 13 of the fixed housing 10.

[0026] The movable housing 20 comprises an outer cylinder 22 and a push rod 23, both of which are cylindrical with openings at both ends.

[0027] The outer cylinder 22 is configured to house the end of the coil spring 28. The base end 22a of the outer cylinder 22 is open and housed inside the cover portion 14. The end (connecting end) 22b of the outer cylinder 22 is closed by fixing the connecting member 21. The end 22b of the outer cylinder 22 is provided with an annular support portion 22c that protrudes radially inward to support the end of the coil spring 28.

[0028] The push rod 23 is configured to connect the spindle nut 27 to the movable housing 20. The base end 23a of the push rod 23 is housed within the guide portion 15 and positioned between the guide portion 15 and the spindle 25. The base end 23a of the push rod 23 is provided with a guide projection 23c that can be fitted into the guide groove 15c of the guide portion 15. The engagement of the guide projection 23c and the guide groove 15c prevents the spindle nut 27 attached to the push rod 23 from rotating relative to the guide portion 15. The end 23b of the push rod 23 is closed by the fixing of the connecting member 21.

[0029] Continuing to refer to Figures 2 and 3, the spindle 25 is rotatably supported within the extension portion 13 by a bearing 26 located in the recess 15e of the guide portion 15. The base end of the spindle 25 is provided with a connecting shaft portion 25a that extends into the housing portion 12 and is connected to the brake 30.

[0030] The spindle nut 27 is connected to the base end 23a of the push rod 23 and screwed onto the spindle 25. The spindle nut 27 also engages with the guide groove 15c of the guide portion 15 via the push rod 23. Alternatively, a guide projection 23c may be provided on the spindle nut 27 to directly engage with the guide groove 15c.

[0031] In the passive support member 6A, when the back door 3 (see Figure 1) is opened and closed, the spindle nut 27 moves linearly toward the end 15b or base 15a of the guide portion 15, causing the spindle 25 to rotate in a rotational direction corresponding to the linear direction. In the active support member 6B of the second embodiment, which will be described later, when the spindle 25 is rotated by the motor 35, the spindle nut 27 moves linearly toward the end 15b or base 15a of the guide portion 15, depending on the direction of rotation.

[0032] The coil spring 28 is configured to elastically bias the movable housing 20 in the direction of advancing from the cover portion 14 of the fixed housing 10. The coil spring 28 is positioned between the cover portion 14 and the guide portion 15 of the fixed housing 10, and between the outer cylinder 22 and the push rod 23 of the movable housing 20. The base end of the coil spring 28 is supported by the support portion 14c of the cover portion 14, and the end end is supported by the support portion 22c of the outer cylinder 22, with the coil spring 28 compressed between them. The cover portion 14 of the fixed housing 10 is pressed against the housing portion 12 and the mounting portion 15d of the guide portion 15 by the coil spring 28.

[0033] Referring to Figures 2 to 5, the brake 30 is housed within the housing 12. The brake 30 is configured to provide rotational resistance to the spindle 25 when the outer cylinder 22 is housed within the cover 14 and the push rod 23 is housed within the guide 15. The brake 30 is positioned within the holding portion 12c of the housing 12 and is sandwiched between the mounting portion 15d of the guide 15, which is located within the mounting recess 12d, and the connecting member 11. The brake 30 includes a rotating member 33 and a coil spring 34. The rotating member 33 and the coil spring 34 are housed within the brake case 31.

[0034] The brake case 31 is cylindrical in diameter so as to fit inside the retaining portion 12c of the housing portion 12. The end of the brake case 31 is provided with an end wall in which a through hole is formed for passing through the connecting shaft portion 25a of the spindle 25. The open base end of the brake case 31 is closed by the cover 32. The brake 30 is held inside the housing portion 12 by fitting the brake case 31 into the retaining portion 12c. The end of the brake case 31 also abuts against the mounting portion 15d of the guide portion 15, more specifically against the bearing 26 in the recess 15e, and the cover 32 abuts against the connecting member 11.

[0035] The rotating member 33 has a non-circular through-hole 33a that penetrates in the axial direction. The connecting shaft portion 25a of the spindle 25 is fixed to the through-hole 33a by press-fitting. As a result, the rotating member 33 is connected to the connecting shaft portion 25a in a way that prevents relative rotation around the axis L, and is able to rotate integrally with the spindle 25.

[0036] The coil spring 34 is positioned to surround the outer circumference of the rotating member 33, elastically tightening it. Both ends of the coil spring 34 are locked to the brake case 31. When the rotating member 33 rotates around the axis L together with the spindle 25, the rotating member 33 slides against the coil spring 34. The frictional resistance of the rotating member 33 sliding against the elastically tightening coil spring 34 becomes the rotational resistance against the spindle 25. The brake torque can be set by changing the number of turns in the winding portion of the coil spring 34.

[0037] The brake 30 can be modified as needed, provided that it can provide rotational resistance to the spindle 25 when the movable housing 20 moves into the fixed housing 10. For example, by locking both ends of a coil spring to a double rotating body, the spiral winding portion may be expanded when the movable housing 20 moves out of the fixed housing 10, thereby reducing or eliminating rotational resistance to the spindle 25.

[0038] In the support member 6A, when the back door 3, which is in the open state as shown in Figure 1, moves in the closing direction, the movable housing 20 moves linearly in the axial direction so that it is stored inside the cover portion 14 of the fixed housing 10. As the movable housing 20 moves linearly, the spindle nut 27 also moves linearly in the axial direction, causing the spindle 25 to rotate. The spindle 25 receives rotational resistance from the brake 30 as described above. Therefore, the brake 30 applies a braking force to the closing operation of the back door 3.

[0039] The support member 6A of the first embodiment, which is a passive type configured in this way, has the following features.

[0040] The brake 30 is housed within the housing portion 12 and sandwiched between the extension portion 13 and the connecting member 11. In other words, no positioning spacer is used to house the brake 30 in the housing portion 12. Therefore, the number of parts in the passive support member 6A equipped with the brake 30 can be reduced.

[0041] The portion of the housing 12 on the side of the connecting member 11 forms a holding portion 12c that holds the brake 30 with its inner surface. This allows the brake 30 to be stably positioned within the housing 12 without the use of a spacer.

[0042] Since the connecting member 11 and the housing 12 are an integrated structure, the number of parts in the passive support member 6A equipped with the brake 30 can be further reduced.

[0043] The portion of the housing section 12 opposite to the connecting member 11 forms a mounting recess 12d for attaching the extension 13. This allows the brake 30 to be sandwiched between the extension 13 and the connecting member 11 within the housing section 12 without the need for a spacer, enabling stable housing.

[0044] The extension portion 13 comprises a cover portion 14 surrounding the coil spring 28 and a guide portion 15 positioned within the coil spring 28 to guide the spindle nut 27. The guide portion 15 has a mounting portion 15d attached to the mounting recess 12d. This allows the brake 30 to be sandwiched between the mounting portion 15d of the guide portion 15 and the connecting member 11 within the housing portion 12 without the use of a spacer, enabling stable housing.

[0045] The movable housing 20 is attached to the guide portion 15 in a non-detachable and axially movable manner by screwing the spindle nut 27 onto the spindle 25. On the other hand, the attachment portion 15d of the guide portion 15 is attached to the attachment recess 12d of the housing portion 12, and the support portion 14c of the cover portion 14 that supports one end of the coil spring 28 is pressed against the attachment portion 15d by the biasing force of the coil spring 28. In this way, since the cover portion 14 can be assembled to the housing portion 12 without providing a special attachment structure between the cover portion 14 and the housing portion 12, the manufacturability of the passive support member 6A provided with the brake 30 can be improved.

[0046] (Second Embodiment) Hereinafter, referring to FIG. 6, the configuration of the active support member 6B according to the second embodiment will be specifically described. In FIG. 6, the same or similar elements as those in the first embodiment are denoted by the same reference numerals. Regarding this embodiment, the configurations and operations not particularly mentioned in the following description are the same as those in the first embodiment.

[0047] Referring to FIG. 6, the support member 6B includes a fixed housing 10 constituted by a housing portion 12, a cover portion 14, and a guide portion 15, and a movable housing 20 constituted by an outer cylinder 22 and a push rod 23, similar to the support member 6A of the first embodiment. Inside the support member 6B, a spindle 25, a spindle nut 27, and a coil spring 28 are accommodated. Further, inside the housing portion 12, in addition to the brake 30, a motor 35 and a gear mechanism 36 are accommodated.

[0048] The overall length of the fixed housing 10 from the proximal end 12a of the housing portion 12 to the distal end 14b of the cover 32 is the same as the overall length of the fixed housing 10 of the first embodiment.

[0049] The overall axial length of the housing portion 12 is made longer than the overall length of the housing portion 12 of the first embodiment in order to accommodate the motor 35 and the gear mechanism 36. The overall axial length of the cover portion 14 is made shorter than the overall length of the cover portion 14 of the first embodiment because the overall length of the housing portion 12 is increased. The guide portion 15 is the same (common) as the guide portion 15 of the first embodiment.

[0050] The outer cylinder 22 is the same as (common to) the outer cylinder 22 of the first embodiment. The axial length of the push rod 23 is shorter than that of the push rod 23 of the first embodiment because the length of the housing portion 12 has been increased.

[0051] The axial length of the spindle 25 is shorter than that of the spindle 25 in the first embodiment because the length of the housing portion 12 has been increased. The configuration of the spindle nut 27 is the same as that of the spindle nut 27 in the first embodiment. The axial length of the coil spring 28 is shorter than that of the coil spring 28 in the first embodiment because the length of the housing portion 12 has been increased.

[0052] Within the housing section 12, the motor 35, gear mechanism 36, and brake 30 are arranged adjacent to each other in order from the base end 12a to the end end 12b.

[0053] Motor 35 is a DC motor capable of forward and reverse rotation. The output shaft of motor 35 is connected to a gear mechanism 36.

[0054] The gear mechanism 36 is configured to reduce the rotation of the output shaft of the motor 35 and transmit it to the spindle 25. The gear mechanism 36 is housed in a housing portion 32a formed in the cover 32. The gear mechanism 36 comprises two planetary gear units 38 and 39. With the motor 35 as the reference, the input side is planetary gear unit 38 and the output side is planetary gear unit 39. Each of the planetary gear units 38 and 39 comprises a casing 38a and 39a with internal teeth, sun gears 38b and 39b, a plurality of planetary gears 38c and 39c, and planetary carriers 38d and 39d.

[0055] The output shaft of the motor 35 is connected to the sun gear 38b of the input-side planetary gear unit 38. In other words, the sun gear 38b constitutes the input section of the gear mechanism 36. Furthermore, the planetary carrier 38d of the input-side planetary gear unit 38 is connected to the sun gear 39b of the output-side planetary gear unit 39. In addition, the connecting shaft portion 25a of the spindle 25 is connected to the planetary carrier 39d of the output-side planetary gear unit 39. In other words, the planetary carrier 39d constitutes the output section of the gear mechanism 36. The rotation of the output shaft of the motor 35 is reduced by the gear mechanism 36 and transmitted to the spindle 25.

[0056] The brake 30 differs from the first embodiment in that the cover 32 is provided with a cylindrical housing portion 32a that protrudes toward the base end. The brake 30 is positioned adjacent to the gear mechanism 36 by housing the gear mechanism 36 within the housing portion 32a of the cover 32. The base end of the brake 30 is in contact with the gear mechanism 36 via the cover 32. On the other hand, the end end of the brake 30 is in contact with the mounting portion 15d of the guide portion 15, similar to the first embodiment. As a result, the brake 30 of the second embodiment is sandwiched between the extension portion 13 and the connecting member 11 via the motor 35 and the gear mechanism 36. The braking torque provided by the brake 30 can also be set to be different for the support members 6A and 6B.

[0057] As described above, by shortening the overall length of the housing section 12 and lengthening the overall length of the cover section 14, a passive support member 6A (first embodiment) can be configured with the brake 30 sandwiched in the housing section 12. On the other hand, by lengthening the overall length of the housing section 12 and shortening the overall length of the cover section 14, an active support member 6B (second embodiment) can be configured with the brake 30, motor 35, and gear mechanism 36 sandwiched in the housing section 12. Furthermore, in the support member 6B of the second embodiment, no spacer is required for arranging the brake 30, and since the housing section 12 is integrally provided with the connecting member 11, the number of parts can be reduced.

[0058] Furthermore, the present invention is not limited to the configuration of the above-described embodiment, and various modifications are possible.

[0059] For example, the brake 30 may be housed in the housing 12 with a gap between it and the inner surface. The housing 12 may be constructed separately from the connecting member 11, and the connecting member 11 may be fixed to the base end 12a of the housing 12.

[0060] Alternatively, the brake 30 may be sandwiched between the extension 13 and the connecting member 11 by assembling the extension 13 to the housing 12, without providing a mounting recess 12d in the housing 12.

[0061] The extension portion 13 may be configured with the cover portion 14 and the guide portion 15 integrated into one unit. Furthermore, the assembly structure of the extension portion 13 to the housing portion 12 can be changed as needed.

[0062] The brake 30 is not limited to a mechanical brake using a rotating member 33 and a coil spring 34, but may also be a magnetic brake using a magnet. When using a magnetic brake, the braking torque is lower compared to a mechanical brake, so it is preferable to mount it together with a mechanism similar to the gear mechanism 36 of the active support member 6B.

[0063] 1 Vehicle 2 Body 3 Back door (door) 5 Vehicle door support device 6, 6A, 6B Vehicle door support member 10 Fixed housing 11 Connecting member (connecting part) 12 Housing part 12a Base end 12b End 12c Holding part 12d Mounting recess 13 Extension part 14 Cover part 14a Base end 14b End 14c Support part 15 Guide part 15a Base end 15b End 15c Guide groove 15d Mounting part 15e Recess 20 Movable housing (movable member) 21 Connecting member 22 Outer cylinder 22a Base end 22b End (connecting end) 22c Support part 23 Push rod 23a Base end 23b End 23c Guide projection 25 Spindle 25a Connecting shaft part 26 Bearing 27 Spindle nut 28 Coil spring 30 Brake 31 Brake case 32 Cover 32a Housing 33 Rotating member 33a Through hole 34 Coil spring 35 Motor 36 Gear mechanism 38, 39 Planetary gear unit 38a, 39a Casing 38b, 39b Sun gear 38c, 39c Planetary gear 38d, 39d Planetary carrier

Claims

1. A vehicle door support member comprising: a connecting portion connected to one of the vehicle body and the door; a cylindrical housing portion projecting from the connecting portion to the other side of the vehicle body and the door; a cylindrical extension portion coaxially connected to the end of the housing portion opposite to the connecting portion; a cylindrical movable member having a connecting end connected to the other side of the vehicle body and the door, the end opposite to the connecting end housed within the extension portion, and movable relative to the extension portion in the axial direction; a spindle having a connecting shaft portion extending within the housing portion and rotatably supported within the extension portion; a spindle nut screwed onto the spindle and connected to the movable member; a coil spring biasing the movable member in a direction toward advancing out of the extension portion; and a brake connected to the connecting shaft portion and applying rotational resistance to the spindle when the movable member moves within the extension portion, wherein the brake is housed within the housing portion and sandwiched between the extension portion and the connecting portion.

2. The portion of the housing that is on the connection side constitutes a holding portion that holds the brake by its inner surface, as described in claim 1.

3. The vehicle door support member according to claim 1, wherein the connecting portion and the housing portion are integrally structured.

4. The portion of the housing that is opposite to the connecting portion constitutes a mounting recess for attaching the extension portion, as described in any one of claims 1 to 3.

5. The vehicle door support member according to claim 4, wherein the extension comprises a cylindrical cover portion surrounding the coil spring, and a cylindrical guide portion separate from the cover portion, disposed within the coil spring, and housing a part of the spindle and the spindle nut inside, guiding the spindle nut so that it is relatively immobile and can move back and forth, and the guide portion has a mounting portion attached to the mounting recess.

6. The vehicle door support member according to claim 5, wherein the cover portion has a support portion that supports one end of the coil spring, and the support portion is pressed against the mounting portion by the biasing force of the coil spring.

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