CN108312901B

CN108312901B - Connecting shaft assembly, driving device, seat and automobile comprising seat

Info

Publication number: CN108312901B
Application number: CN201810213572.6A
Authority: CN
Inventors: 尹长久; 汪涛
Original assignee: NIO Anhui Holding Co Ltd
Current assignee: NIO Holding Co Ltd
Priority date: 2018-03-15
Filing date: 2018-03-15
Publication date: 2020-12-04
Anticipated expiration: 2038-03-15
Also published as: CN108312901A

Abstract

The invention belongs to the field of automobiles, and particularly provides a connecting shaft assembly, a driving device, a seat and an automobile comprising the seat. The scheme aims to solve the problem that the motor rotor of the seat sliding device of the existing automobile can also rotate along with the manual driving so as to cause the large movement resistance of the seat. To this end, the connecting shaft assembly of the present invention includes an input shaft, an intermediate shaft, and an output shaft. One end of the input shaft is coaxially connected with one end of the intermediate shaft; one end of the output shaft is coaxially connected with the other end of the intermediate shaft, and the output shaft can freely rotate relative to the intermediate shaft; the connection of the input shaft and the intermediate shaft is arranged such that when the input shaft rotates, the intermediate shaft is driven to slide to a target position and thus the intermediate shaft and the output shaft are circumferentially fixed, thereby enabling the input shaft to drive the output shaft to rotate by means of the intermediate shaft. When the connecting shaft assembly with the structure is applied to the seat, the resistance of a user in the process of manually driving the seat can be reduced, and the use experience of the user is improved.

Description

Connecting shaft assembly, driving device, seat and automobile comprising seat

Technical Field

The invention belongs to the field of automobiles, and particularly provides a connecting shaft assembly, a driving device, a seat and an automobile comprising the seat.

Background

Seat slide devices for automobiles mainly include two types of manual seat slide devices and electric seat slide devices. While powered seat slides provide a user with a use experience and comfort that is superior to manual seat slides, powered seat slides move the seat at a slower rate. Therefore, when the seat needs to be adjusted for a long distance, the time required by the electric seat sliding device is longer than that required by the manual seat sliding device, and the use experience of the user is poor.

To this end, chinese patent application CN206327188U discloses an electric and manual dual-purpose vehicle seat adjusting device, which mainly includes a fixing plate disposed on the vehicle body, a gear disposed below the seat, a motor and a positioning rod. The gear and the output shaft of the motor are coaxially fixed, a rack seat and a positioning hole are arranged on the fixing plate, a rack in the rack seat is meshed with the gear, and the positioning hole is matched with the positioning rod. When the seat moves, a user firstly lifts the positioning rod out of the positioning hole manually, and then the seat moves forwards and backwards in a motor driving gear mode or a manual driving mode. After the seat moves to the target position, the user inserts the positioning rod into the positioning hole to fix the seat. Therefore, when the seat is moved in an electric mode, a user needs to operate the key with one hand and pull the positioning rod with the other hand. And when adopting manpower drive's mode drive seat back-and-forth movement, the rotor of motor also can follow the gear rotation, has increased driving resistance, and the user experiences relatively poorly.

Accordingly, there is a need in the art for a new seat slide apparatus that solves the above problems.

Disclosure of Invention

In order to solve the above problems in the prior art, that is, to solve the problem that the seat sliding device of the prior vehicle has a large movement resistance of the seat due to the fact that the motor rotor rotates along with the seat sliding device when the seat sliding device is driven manually, the present invention provides a connecting shaft assembly, which includes: the device comprises an input shaft, an output shaft and an intermediate shaft, wherein the input shaft and the output shaft are coaxially arranged, and the intermediate shaft is arranged between the input shaft and the output shaft in a manner of being coaxially connected with the input shaft and the output shaft in a sliding manner; wherein the output shaft is free to rotate relative to the intermediate shaft without rotation of the input shaft; when the input shaft rotates, the intermediate shaft is driven to slide to a target position, so that the intermediate shaft and the output shaft are fixed in the circumferential direction, and the input shaft drives the output shaft to rotate by means of the intermediate shaft.

In the preferable technical scheme of the connecting shaft assembly, one of the input shaft and the intermediate shaft is provided with a V-shaped groove, and the other of the input shaft and the intermediate shaft is provided with a limiting component matched with the V-shaped groove; when the input shaft rotates, the limiting component slides to one end of the V-shaped groove from the middle bending part of the V-shaped groove, so that the intermediate shaft slides to a target position, and the input shaft drives the output shaft to rotate by means of the intermediate shaft.

In the above preferred technical solution of the connecting shaft assembly, the stop member is a pin or a ball.

In the above preferred technical solution of the connecting shaft assembly, a first spring is further disposed between the input shaft and the intermediate shaft of the connecting shaft assembly, so that when the input shaft and the intermediate shaft stop rotating, the intermediate shaft is restored to an initial position by the elastic force of the first spring, and in the initial position, the limit member is located at the middle bending position of the V-shaped groove.

In a preferred technical solution of the above connecting shaft assembly, the first spring is disposed at a bottom end of a first fitting hole at one end of the intermediate shaft, and one end of the input shaft is fitted into the first fitting hole against the first spring.

In a preferred embodiment of the above connecting shaft assembly, an input shaft hole is provided at one end of the input shaft close to the intermediate shaft, and a part of the first spring is accommodated in the input shaft hole.

In the above preferred technical solution of the connecting shaft assembly, one of the intermediate shaft and the output shaft is provided with an internal spline, and the other of the intermediate shaft and the output shaft is provided with an external spline; when the intermediate shaft is slid to the target position, the internal spline engages with the external spline, and thus circumferentially fixes the intermediate shaft and the output shaft.

In the preferable technical scheme of the connecting shaft assembly, one end of the intermediate shaft, which is close to the output shaft, is provided with a second matching hole, and the internal spline is arranged in the second matching hole; when the input shaft does not rotate, the external splines arranged on the output shaft are positioned in the second matching holes and separated from the internal splines, so that the output shaft can freely rotate relative to the intermediate shaft.

In addition, the invention also provides a driving device, which comprises the connecting shaft assembly in any one of the preferable technical schemes of the connecting shaft assembly, and a rotating shaft of the motor is in driving connection with the input shaft.

In addition, the invention also provides a seat which moves by virtue of travelling wheels and comprises the driving device.

Besides, the invention also provides an automobile which comprises the seat.

As will be appreciated by those skilled in the art, in a preferred embodiment of the present invention, one end of the input shaft is coaxially connected to one end of the intermediate shaft; one end of the output shaft is coaxially connected with the other end of the intermediate shaft, and the output shaft can freely rotate relative to the intermediate shaft; the connection of the input shaft and the intermediate shaft is arranged such that when the input shaft rotates, the intermediate shaft is driven to slide to a target position and thus the intermediate shaft and the output shaft are circumferentially fixed, thereby enabling the input shaft to drive the output shaft to rotate by means of the intermediate shaft. The connecting shaft assembly with the structure can enable the rotating input shaft to drive the output shaft to rotate by virtue of the intermediate shaft, and the output shaft cannot drive the input shaft to rotate when rotating.

When the connecting shaft assembly is applied to a seat of an automobile, the input shaft is in driving connection with the motor, and the output shaft is in driving connection with the travelling wheels for supporting the seat to move. When the motor drives the input shaft to rotate, the input shaft can drive the output shaft and the walking wheels to rotate through the intermediate shaft, and when the walking wheels drive the output shaft to rotate, the output shaft cannot drive the intermediate shaft and the input shaft to rotate, so that a rotor of the motor keeps a static state. Therefore, when the connecting shaft assembly is applied to the seat of the automobile, the resistance of a user in the process of manually driving the seat can be reduced, and the use experience of the user is improved.

Scheme 1, a connecting axle subassembly, it includes: the device comprises an input shaft, an output shaft and an intermediate shaft, wherein the input shaft and the output shaft are coaxially arranged, and the intermediate shaft is arranged between the input shaft and the output shaft in a manner of being coaxially connected with the input shaft and the output shaft in a sliding manner;

wherein the output shaft is free to rotate relative to the intermediate shaft without rotation of the input shaft;

when the input shaft rotates, the intermediate shaft is driven to slide to a target position, so that the intermediate shaft and the output shaft are fixed in the circumferential direction, and the input shaft drives the output shaft to rotate by means of the intermediate shaft.

Scheme 2, according to scheme 1 the connecting axle subassembly, characterized in that, be provided with the V-arrangement groove on one in input shaft and the jackshaft, be provided with the stop component with the V-arrangement groove phase-match on the other in input shaft and the jackshaft;

when the input shaft rotates, the limiting component slides to one end of the V-shaped groove from the middle bending part of the V-shaped groove, so that the intermediate shaft slides to a target position, and the input shaft drives the output shaft to rotate by means of the intermediate shaft.

Scheme 3, according to the connecting axle subassembly of scheme 2, characterized in that, stop member is pin or ball.

The connecting shaft assembly according to claim 4 or 2, characterized in that a first spring is further disposed between the input shaft and the intermediate shaft of the connecting shaft assembly, so that when the input shaft and the intermediate shaft stop rotating, the intermediate shaft is restored to an initial position by the elastic force of the first spring, and in the initial position, the limit member is located at the middle bending position of the V-shaped groove.

The connecting shaft assembly according to claim 5 or 4, wherein the first spring is disposed at a bottom end of a first fitting hole at one end of the intermediate shaft, and one end of the input shaft is fitted into the first fitting hole against the first spring.

The connecting shaft assembly according to claim 6 or 5, wherein an input shaft hole is formed at one end of the input shaft close to the intermediate shaft, and part of the structure of the first spring is accommodated in the input shaft hole.

Scheme 7, the connecting shaft assembly according to scheme 1, characterized in that one of the intermediate shaft and the output shaft is provided with an internal spline, and the other of the intermediate shaft and the output shaft is provided with an external spline;

when the intermediate shaft is slid to the target position, the internal spline engages with the external spline, and thus circumferentially fixes the intermediate shaft and the output shaft.

Scheme 8, according to scheme 7 the connecting shaft assembly, characterized in that one end of the intermediate shaft near the output shaft is provided with a second mating hole, and the internal spline is arranged in the second mating hole;

when the input shaft does not rotate, the external splines arranged on the output shaft are positioned in the second matching holes and separated from the internal splines, so that the output shaft can freely rotate relative to the intermediate shaft.

Scheme 9, a drive arrangement, characterized in that, the drive arrangement includes motor and the connecting axle subassembly of any one of schemes 1 to 8, the pivot of motor with the input shaft drive is connected.

Scheme 10, a seat, the seat borrows to remove by the walking wheel, its characterized in that, the seat still includes scheme 9 drive arrangement, the output shaft with walking wheel drive connection.

Solution 11, an automobile, characterized in that, the automobile includes the seat of solution 10.

Drawings

Preferred embodiments of the present invention are described below in conjunction with an automobile with reference to the accompanying drawings, in which:

FIG. 1 is a first side view of the seat slide of the present invention;

FIG. 2 is a second side view of the seat slide of the present invention

FIG. 3 is a front view of the seat slide of the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 1;

FIG. 5 is an enlarged view of portion B of FIG. 2;

FIG. 6 is a cross-sectional view of the seat slide of FIG. 3 taken along the direction C-C;

FIG. 7 is a cross-sectional view of the seat slide of FIG. 3 taken along the direction D-D;

FIG. 8 is an exploded view of the connecting shaft assembly of the first embodiment of the present invention;

FIG. 9 is a front view of the connecting shaft assembly of the first embodiment of the present invention;

FIG. 10 is a cross-sectional view of the connecting shaft assembly of FIG. 9 taken along the direction E-E;

FIG. 11 is a side view of the intermediate shaft of the first embodiment of the present invention;

FIG. 12 is a side view of the intermediate shaft of the second embodiment of the present invention;

FIG. 13 is a side view of the output shaft of the second embodiment of the present invention;

FIG. 14 is a schematic illustration of a second embodiment of the present invention showing a first relative position of the output shaft and the intermediate shaft, the output shaft and the intermediate shaft being able to rotate relative to each other;

FIG. 15 is a schematic view of a second relative position of the output shaft and the intermediate shaft in a second embodiment of the invention, where the output shaft and the intermediate shaft rotate synchronously

FIG. 16 is a side elevational view of the input shaft of the third embodiment of the present invention;

FIG. 17 is a side view of the intermediate shaft of the third embodiment of the present invention;

FIG. 18 is a cross-sectional view of the intermediate shaft of the third embodiment of the present invention;

FIG. 19 is a side elevational view of the output shaft of the third embodiment of the present invention;

FIG. 20 is a schematic view of a coupling shaft assembly in a first state in accordance with a third embodiment of the present invention;

FIG. 21 is a schematic view of a coupling shaft assembly in a second state in accordance with a third embodiment of the present invention;

fig. 22 is an enlarged view of a portion H in fig. 20.

List of reference numerals:

10. a lower guide rail; 11. a rack; 20. a seat fixing mechanism; 21. an upper guide rail; 22. a gear; 23. a rotating shaft; 30. a handle; 31. an operation end; 32. an execution end; 33. an auxiliary handle; 40. a motor; 50. connecting the shaft assembly; 51. an input shaft; 511. a first external spline; 512. a V-shaped groove; 513. an input shaft hole; 52. an intermediate shaft; 521. a first mating hole; 5211. a first internal spline; 5212. an annular bottom end; 522. a second mating hole; 5221. a second internal spline; 523. a pin hole; 524. an annular shoulder; 53. an output shaft; 531. a second male spline; 532. an annular flange; 54. a first spring; 55. a ball bearing; 56. plugging by screwing; 60. a locking mechanism; 61. a vertical moving member; 62. a pivot member; 621. a strip-shaped hole; 63. unlocking the lock; 64. a second spring; 65. a pin.

Detailed Description

It should be understood by those skilled in the art that the embodiments of the present invention are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the seat sliding apparatus of the present invention is described in the embodiment using an automobile as an example, the seat sliding apparatus of the present invention may be applied to any other feasible equipment, such as a subway, a train, a high-speed rail, and the like. Those skilled in the art can make modifications as needed to suit a particular application, and such modified embodiments will still fall within the scope of the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1 to 3, the seat sliding apparatus of the present invention mainly includes a lower rail 10, a seat fixing mechanism 20, a handle 30, a motor 40, and a locking mechanism 60. In practical applications, the lower rail 10 is fixedly mounted to the floor of the vehicle, and the seat fixing mechanism 20 is fixedly connected to the seat of the vehicle. Wherein the seat fixing mechanism 20 is slidably connected to the lower rail 10. The lock mechanism 60 can be switched between the locked state and the unlocked state, and the lock mechanism 60 in the normal state is in the locked state. When the lock mechanism 60 is in the locked state, the seat fixing mechanism 20 and the lower rail 10 are fixed together, and relative sliding cannot occur. The handle 30 is operatively connected to the locking mechanism 60, and the locking mechanism 60 can be switched from the locked state to the unlocked state by operating the handle 30. At this time, the user can manually operate the seat fixing mechanism 20 to move the seat fixing mechanism 20 in the extending direction of the lower rail 10. Further, a traveling mechanism (not shown) is disposed on both sides of the seat fixing mechanism 20, and the traveling mechanism is drivingly connected to the motor 40 through a connecting shaft assembly 50. The connecting shaft assembly 50 is in driving connection with the locking mechanism 60, and when the motor 40 drives the connecting shaft assembly 50 to rotate, the connecting shaft assembly 50 can enable the locking mechanism 60 to be switched from a locking state to an unlocking state. At this time, the motor 40 drives the traveling mechanism to move in the extending direction of the lower rail 10 through the connecting shaft assembly 50.

It will be appreciated by those skilled in the art that the dual output shaft motor 40 shown in fig. 1-3 may be replaced by any other type of motor, such as a single output shaft motor, a hydraulic motor, a pneumatic motor, etc.

With continued reference to fig. 1-3, the seat fixing mechanism 20 is provided with a rotatable shaft 23, and a middle portion of the handle 30 is fixedly connected to the shaft 23. The handle 30 includes an operating end 31 for being operated by a user and an actuating end 32 for actuating the locking mechanism 60. The handle 30 can be rotated about the rotary shaft 23 by pulling the operating end 31 of the handle 30, and the actuating end 32 drives the locking mechanism 60 to switch from the locked state to the unlocked state. Further, in the preferred embodiment of the present invention, one locking mechanism 60 is provided for each of the two lower rails 10. Correspondingly, the seat sliding device of the invention further comprises a secondary handle 33, one end of the secondary handle 33 is fixedly connected with the rotating shaft 23, and the other end of the secondary handle 33 is in driving connection with another locking mechanism 60. As can be seen from fig. 1 to 3, the handle 30 is arranged in parallel with the sub-handle 33 so that the handle 30 and the sub-handle 33 can be operated in synchronism with each other while unlocking the two lock mechanisms 60.

In a preferred embodiment of the present invention, a return spring for maintaining the handle 30 and the sub-handle 33 in the state shown in fig. 1 and 2 is provided between the seat fixing mechanism 20 and the rotating shaft 23. At this time, the handle 30 and the sub-handle 33 do not apply pressure to the lock mechanism 60. The seat fixing mechanism 20 is further provided with a stopper for limiting the handle 30 and preventing the handle 30 from being excessively rotated in the direction of the operation end 31.

It can be understood by those skilled in the art that, in the case where the seat fixing mechanism 20 and the lower rail 10 can be locked, the seat slide apparatus of the present invention may be provided with one or more locking mechanisms 60 on only one of the two lower rails 10, in addition to the case shown in fig. 1 to 3.

With continued reference to fig. 1-3, a rack 11 is provided within the lower track 10, preferably with the rack 11 being fixedly mounted in the lower track 10 by bolts. Or the rack 11 can be fixed to the lower rail 10 by any other means of fixing, such as welding, clamping or integral molding, as required. In another possible technical solution of the present invention, the lower rail 10 may also be any other possible rail, for example, a rail without a rack, a rail with a rubber strip at the bottom, and the like, on the premise that the traveling mechanism can travel on the lower rail 10.

As shown in fig. 1 to 3 and 5, the seat fixing mechanism 20 includes an upper rail 21. The upper rail 21 is slidably connected to the lower rail 10, and the top of the upper rail 21 is fixedly connected to the seat attachment mechanism 20, where the upper rail 21 is mainly used to support the seat attachment mechanism 20. The traveling mechanism of the seat fixing mechanism 20 mainly includes a gear 22. The gear 22 is pivotally provided on the upper rail 21, and the gear 22 is engaged with the rack 11, and the gear 22 is coaxially fixed with the connecting shaft assembly 50. Alternatively, the gear 22 may be pivotally disposed on the seat fixing mechanism 20 as needed by those skilled in the art, with the gear 22 engaged with the rack 11. The lower gear 22 can drive the seat fixing mechanism 20 to move in the extending direction of the lower rail 10 by engagement with the rack 11 under the driving of the motor 40. Furthermore, one skilled in the art can configure gear 22 to be any other feasible road wheel, such as a rubber wheel, as desired. It is also possible for those skilled in the art to omit the upper rail 21 and support and drive the seat fixing mechanism 20 to move in the extending direction of the lower rail 10 through the gear 22, as necessary.

As shown in fig. 4 to 7, the locking mechanism 60 mainly includes a vertical moving member 61, a pivoting member 62, an unlocking member 63, and a second spring 64. As shown in fig. 6 and 7, the vertical moving member 61 includes a rod-shaped portion (not shown) and a tooth block (not shown) having a tooth-like structure at one end, wherein one end of the rod-shaped portion is provided with an end cap (not shown), and the other end of the rod-shaped portion is fixedly connected with the tooth block. The vertical moving member 61 is movably connected to the upper rail 21 in the vertical direction by a rod-shaped portion. When the vertical moving member 61 moves vertically downward against the rack 11, the toothed structure of the toothed block can mesh with the rack 11. As shown in fig. 7, one end of the second spring 64 abuts against the upper guide rail 21, the other end of the second spring 64 abuts against the tooth block, and the second spring 64 provides a force to the vertical moving member 61 toward the rack 11 for driving the vertical moving member 61 to move toward the rack 11.

It will be understood by those skilled in the art that the toothed block may also be provided in any other feasible configuration, such as a rubber block, a metal block with corrugations, a cylinder with a conical configuration, provided that the vertical moving member 61 abuts against the lower rail 10 and thus locks the seat attachment mechanism 20 and the lower rail 10 together.

As shown in fig. 4, 5 and 7, the pivoting member 62 is pivotally connected to the upper rail 21 via a pin 65, a first end of the unlocking member 63 is sleeved on the connecting shaft assembly 50, a second end of the unlocking member 63 is slidably connected to a first end of the pivoting member 62, and a second end of the pivoting member 62 is drivingly connected to an end cap of the vertical moving member 61. Specifically, the second end of the pivoting member 62 has a U-shaped hole, the second end of the pivoting member 62 is located between the end cap and the upper rail 21, and the rod-shaped portion of the vertical moving member 61 is located in the U-shaped hole.

With continued reference to fig. 4, 5, and 7, the first end of the pivot member 62 includes a horizontal plate (not shown) and a vertical plate (not shown) that are perpendicular to each other. Wherein the horizontal plate abuts against the actuating end 32 of the handle 30, so that when the operating end 31 of the handle 30 is pulled, the actuating end 32 can drive the horizontal plate (the first end of the pivoting member 62) to move vertically downwards, and then the second end of the pivoting member 62 drives the vertical moving member 61 to move vertically upwards, and thus the locking mechanism 60 is switched from the locking state to the unlocking state. An inclined strip-shaped hole 621 is formed in the vertical plate, and the height of one end of the strip-shaped hole 621 in the vertical direction is higher than that of the other end of the strip-shaped hole 621 in the vertical direction. The second end of the unlocking member 63 is provided with a cylindrical pin slidably disposed in the strip-shaped hole 621. When the motor 40 rotates the connecting shaft assembly 50, the connecting shaft assembly 50 can drive the unlocking member 63 to slide toward the left side of the strip hole 621 shown in fig. 7. With the sliding of the unlocking piece 63, the vertical plate (the first end of the pivoting piece 62) moves vertically downward, so that the second end of the pivoting piece 62 drives the vertical moving piece 61 to move vertically upward, and thus the locking mechanism 60 is switched from the locked state to the unlocked state. When the unlocking member 63 moves to the unlocking position, that is, the cylindrical pin slides to the left end of the strip-shaped hole 621, the locking mechanism 60 is in the unlocking state.

A first embodiment of the connecting shaft assembly 50 of the present invention will be described in detail with reference to fig. 3 and 8 to 11.

As shown in fig. 3, 8 to 10, in the first embodiment of the present invention, the connecting shaft assembly 50 mainly includes an input shaft 51, an intermediate shaft 52, an output shaft 53, and a first spring 54. The first end of the input shaft 51 is coaxially and fixedly connected with the rotating shaft of the motor 40, and the second end of the input shaft 51 is coaxially and fixedly connected with the intermediate shaft 52. The first end of the output shaft 53 is coaxially and fixedly connected with the gear 22, and the second end of the output shaft 53 is coaxially and fixedly connected with the intermediate shaft 52. The first spring 54 is provided between the input shaft 51 and the intermediate shaft 52, and the first spring 54 is normally in a compressed state so as to provide the input shaft 51 and the intermediate shaft 52 with a force repelling each other in the axial direction. In the preferred embodiment of the present invention, the intermediate shaft 52 is movable in the axial direction thereof with respect to the input shaft 51 and the output shaft 53.

As shown in fig. 8 to 10, one end of the input shaft 51 remote from the motor 40 is provided with a first external spline 511 and two symmetrical V-shaped grooves 512. Wherein the two V-shaped grooves 512 are separated from each other and do not communicate. The end of the output shaft 53 remote from the gear 22 is provided with a second external spline 531. A first engagement hole 521 is provided at an end of the intermediate shaft 52 adjacent to the input shaft 51, and a second engagement hole 522 is provided at an end of the intermediate shaft 52 adjacent to the output shaft 53. Wherein, a first inner spline 5211 matching with the first outer spline 511 is arranged in the first matching hole 521, a second inner spline 5221 matching with the second outer spline 531 is arranged in the second matching hole 522, and the second inner spline 5221 penetrates through the whole second matching hole 522. Further, two pin holes 523 are disposed on the side wall of the first mating hole 521.

As shown in fig. 9 and 10, in the assembled state of the connecting shaft assembly 50, the two pin holes 523 are aligned with the two V-shaped grooves 512, respectively, so that a pin (not shown) as a stopper member passes through the pin holes 523 and abuts against the inner walls of the V-shaped grooves 512, and the pin and the V-shaped grooves 512 are slidable relative to each other. Under the action of the first spring 54, the first internal spline 5211 of the intermediate shaft 52 in the initial state is disengaged from the first external spline 511, and the second internal spline 5221 is engaged with (matingly connected to) the second external spline 531. At this time, the pin abuts against the bottom of the V-shaped groove 512 in fig. 8. When the input shaft 51 starts to rotate, the rotating V-groove 512 forces the pin in the pin hole 523 to move upward (first direction) in the extending direction of the V-groove 512, so that the intermediate shaft 52 moves upward in fig. 10 (first direction). Until the intermediate shaft 52 moves to the target position, at which time the pin moves to the top of the V-groove 512 and the first internal splines 5211 mesh with (mate with) the first external splines 511. When the input shaft 51 stops rotating, the intermediate shaft 52 returns to the initial position (relative to the initial position of the input shaft 51) shown in fig. 10 again under the action of the first spring 54, and the pin is located at the middle bending part of the V-shaped groove 512.

It will be understood by those skilled in the art that the number of the V-shaped groove 512, the pin hole 523 and the pin connecting the two is not limited to the above two, and those skilled in the art can arrange the V-shaped groove 512, the pin hole 523 and the pin in any other feasible number as required. For example, the V-shaped groove 512, the pin hole 523, and the pin are provided in one, three, four, or the like.

It can also be understood by those skilled in the art that since the two V-shaped grooves 512 are separated from each other and not communicated with each other, when the pin slides to the two ends of the V-shaped groove 512, the V-shaped groove 512 can limit the pin, so that the input shaft 51 drives the intermediate shaft 52 to rotate. It is also possible for those skilled in the art to omit the first inner spline 5211 and the first outer spline 511 as desired. Or those skilled in the art can also make both ends of the two V-grooves 512 communicate with each other with the first internal spline 5211 and the first external spline 511 retained, so as to enable the pin to freely slide between the two V-grooves 512, as required.

It will also be appreciated by those skilled in the art that the pin in the pin hole 523 may be replaced with any other feasible structure, such as a ball + plug configuration, where a ball is first placed into the pin hole 523 and a plug is then threadably installed into the pin hole 523.

As shown in fig. 11, in the first embodiment of the invention, the second internal splines 5221 of the intermediate shaft 52 extend completely through the second mating holes 522 so that the second internal splines 5221 can be engaged with the second external splines 531 when the intermediate shaft 52 is moved to any position along the axis.

As shown in fig. 8 to 11, the end of the intermediate shaft 52 near the output shaft 53 is also provided with an annular shoulder 524. The first end of the unlocking member 63 fitted over the intermediate shaft 52 is moved in the first direction (upward in fig. 10) by the annular shoulder 524.

The operation of the seat slide apparatus of the present invention will be described in detail with reference to fig. 1, 2, 8 and 9.

When the seat is automatically adjusted in position, the user manually operates the control buttons (forward button and backward button) of the motor 40, and the motor 40 drives the input shaft 51 to rotate forward or backward according to the operation of the buttons by the user. The rotating input shaft 51 drives the intermediate shaft 52 to move in a first direction (a direction closer to the motor 40) by engagement between the V-shaped groove 512 and the pin on the intermediate shaft 52. The moving intermediate shaft 52 drives the unlocking member 63 via the annular shoulder 524 also in the first direction. When the intermediate shaft 52 moves to the point where the first external splines 511 and the first internal splines 5211 are engaged, the unlocking member 63 slides to the target position and drives the pivoting member 62 to disengage the vertical moving member 61 from the rack 11 on the lower rail 10. At this time, the rotation shaft of the motor 40, the input shaft 51, the intermediate shaft 52, the output shaft 53 and the gear 22 rotate coaxially, and the gear 22 rolls in the extending direction of the rack 11 under the driving of the motor 40, thereby achieving the forward or backward movement of the seat. As will be understood by those skilled in the art, the timing of the engagement of the first external spline 511 and the first internal spline 5211 is later than the timing of the complete disengagement of the vertical moving member 61 from the rack bar 11, in other words, after the vertical moving member 61 is completely disengaged from the rack bar 11, the first external spline 511 and the first internal spline 5211 are brought into contact engagement, so as to prevent the vertical moving member 61 from not being completely disengaged from the rack bar 11 when the first external spline 511 and the first internal spline 5211 are engaged, so that the motor 40 cannot drive the gear 22 to rotate, and the excessive load is damaged.

When the seat is adjusted manually, the user pulls the operating end 31 of the handle 30 to rotate the handle 30 and the sub-handle 33 about the rotating shaft 23, so that the actuating ends 32 and 33 (not shown) of the handle 30 and the sub-handle 33 drive the first end (specifically, the horizontal plate) of the pivoting member 62 to move vertically downward, and therefore the pivoting member 62 rotates about the pin 65. The rotating pivot member 62 separates the vertical moving member 61 from the rack 11 on the lower rail 10 by its second end. After the vertical moving member 61 is completely separated from the rack 11, that is, after the locking mechanism 60 is completely switched to the unlocked state, the user seated on the seat moves the seat forward or backward by both feet.

It will be understood by those skilled in the art that when the seat is in the manual adjustment position, the gear 22 will also rotate along the extending direction of the rack 11, and the rotating gear 22 will drive the intermediate shaft 52 to rotate through the output shaft 53, so that the intermediate shaft 52 and the input shaft 51 will rotate relatively. When the intermediate shaft 52 and the input shaft 51 rotate relatively, the intermediate shaft 52 moves axially by the engagement between the pin and the V-groove 512, so that the first inner and outer splines 5211 and the first outer spline 511 are engaged, and thus the input shaft 51 connected to the rotating shaft of the motor 40 is driven to rotate. Therefore, when the user manually adjusts the seat, the rotating shaft of the motor 40 rotates along with the rotation of the gear 22, which causes unnecessary resistance to the movement of the seat and makes the user feel more strenuous to operate. To this end, the present invention also provides a second embodiment of the connecting shaft assembly 50.

A second embodiment of the connecting shaft assembly 50 of the present invention will now be described in detail with reference to fig. 12-15.

For convenience of description, and to facilitate understanding by those skilled in the art, only the differences between the second embodiment and the first embodiment will be described below.

As shown in fig. 12, in the second embodiment, the second internal splines 5221 of the intermediate shaft 52 do not extend completely through the second mating holes 522, unlike the first embodiment. In fig. 12, the portion of the second mating hole 522 at the upper end of the second internal spline 5221 is a circular hole (not labeled) having a diameter greater than the diameter of the circumscribed circle of the second internal spline 5221, so that the second external spline 531 can enter the circular hole.

As shown in fig. 13, unlike the first embodiment, in the second embodiment, the length of the second male spline 531 is small in value and is smaller than the length of the above-described circular hole in fig. 12, so that the second male spline 531 can be completely placed in the circular hole and freely rotated. Further, in fig. 13, the diameter of the part of the rod-like structure of the output shaft 53 below the second male spline 531 is smaller than the diameter of the inscribed circle of the second female spline 5221, so that the second male spline 531 can enter the above-mentioned round hole.

Under normal conditions, the engagement relationship between the intermediate shaft 52 and the output shaft 53 by the second spring 64 is as shown in fig. 14.

When the seat is manually adjusted in position, the fit relationship between the intermediate shaft 52 and the output shaft 53 is as shown in fig. 14. At this time, the output shaft 53 rotates, the intermediate shaft 52 is stationary, and the second male spline 531 rotates inside the circular hole.

When the seat is automatically adjusted to a position, the rotating shaft of the motor 40 drives the input shaft 51 to rotate, and the rotating input shaft 51 drives the intermediate shaft 52 to move towards the direction close to the motor 40 through the matching between the V-shaped groove 512 and the pin on the intermediate shaft 52 until the position is stopped. The fitting relationship between the intermediate shaft 52 and the output shaft 53 is shown in fig. 15. At this time, the first male spline 511 is engaged with the first female spline 5211, the second male spline 531 is engaged with the second female spline 5221, the input shaft 51, the intermediate shaft 52 and the output shaft 53 rotate synchronously, and the motor 40 drives the gear 22 to rotate.

Therefore, the second embodiment of the present invention not only enables the seat slide apparatus of the present invention to achieve automatic adjustment of the seat, but also enables the rotating shaft of the motor 40 not to rotate with the rotation of the gear 22 when the seat slide apparatus of the present invention is manually adjusted. The resistance generated by the motor 40 when the seat is manually adjusted is saved, the user can drive the seat to move with smaller force, and the operation comfort is improved.

A third embodiment of the connecting shaft assembly 50 of the present invention will now be described in detail with reference to fig. 16 to 22.

For convenience of description, and to facilitate understanding by those skilled in the art, only the differences between the third embodiment and the first embodiment will be described below.

As shown in fig. 16, in the third embodiment, the first external spline 511 of the input shaft 51 is replaced with an input shaft hole 513 shown in fig. 16, unlike the first embodiment. In the assembled state of the connecting shaft assembly 50, one end of the first spring 54 is placed in the input-shaft hole 513, and the end of the first spring 54 abuts against the bottom end of the input-shaft hole 513.

As shown in fig. 17 and 18, in the third embodiment, unlike the first embodiment, the first internal splines 5211 provided in the first fitting hole 521 are also omitted in correspondence with the omitted first external splines 511. Further, the second fitting hole 522 communicates with the first fitting hole 521 such that the bottom end of the first fitting hole 521 forms an annular bottom end 5212. In the assembled state of the connecting shaft assembly 50, the other end of the first spring 54 abuts against the annular bottom end 5212. Wherein the second internal splines 5221 in the second mating bore 522 are disposed at a location remote from the first mating bore 521. It should be noted that although the annular shoulder 524 of the first embodiment is not shown, one skilled in the art may arrange the annular shoulder 524 on the intermediate shaft 52 of the third embodiment as needed.

It will be appreciated by those skilled in the art that the first, second and third embodiments of the countershaft may be provided without the annular shoulder 524 when the locking mechanism 60 of the present invention takes other forms (such as the detent lever of patent application CN 206327188U).

As shown in fig. 19, in the third embodiment, unlike the first embodiment, one end of the output shaft 53 near the second male spline 531 is provided with an annular flange 532. The annular flange 532 has a diameter that is smaller than the diameter of the second mating bore 522 and larger than the circumscribed diameter of the second internal spline 5221.

As shown in fig. 20 and 21, fig. 20 shows the connecting shaft assembly 50 in the first state, and fig. 21 shows the connecting shaft assembly 50 in the second state.

As shown in fig. 20 and 22, in the third embodiment of the present invention, the input shaft 51 and the intermediate shaft 52 are axially defined by the balls 55 and the plug 56. Specifically, the balls 55 are inserted into the pin holes 523, and are in rolling contact with the inner walls of the V-grooves 512. The plug 56 is screwed into the pin hole 523 to prevent the ball 55 from coming out of the pin hole 523. When assembled, the output shaft 53 is inserted from the first fitting hole 521 into the second fitting hole 522 in the top-down direction in fig. 20. Then, the first spring 54 and the input shaft 51 are sequentially put into the first fitting hole 521, and then the input shaft 51 and the intermediate shaft 52 are fixed by the balls 55 and the plug 56. The output shaft 53 can be prevented from coming out of the end of the second fitting hole 522 far from the first fitting hole 521 by interference between the annular flange 532 and the second internal spline 5221.

As shown in fig. 20, the input shaft 51 is moved away from the intermediate shaft 52 by the first spring 54, and the balls 55 are pressed against the middle bent portion of the V-shaped groove 512. In this state, the second internal spline 5221 and the second external spline 531 are separated from each other, and the output shaft 53 is rotatable relative to the intermediate shaft.

When the input shaft 51 rotates, the balls 55 slide along the V-shaped grooves 512 from the middle bend shown in FIG. 20 to the end shown in FIG. 21, and urge the intermediate shaft 52 to slide from the position shown in FIG. 20 toward the input shaft 51 to the position shown in FIG. 21. During the sliding of the intermediate shaft 52, the second internal spline 5221 and the second external spline 531 gradually come into engagement from being disengaged.

As shown in fig. 21, the two balls 55 respectively abut against one end of the two V-shaped grooves 512, the second internal spline 5221 is engaged with the second external spline 531, and the input shaft 51 can rotate the output shaft 53 via the intermediate shaft 52.

It will be appreciated by those skilled in the art that in the above three embodiments of the present invention, the V-shaped groove 512 may also be provided on the intermediate shaft 52, and the corresponding pin (or ball 55 and plug 56) on the intermediate shaft 52 may also be provided on the input shaft 51. Further, the connecting shaft assembly 50 of the present invention is not limited to the above-mentioned three embodiments, and may be a combination of some technical features of the above-mentioned three embodiments.

It can be understood by those skilled in the art that the connecting shaft assembly 50 of the second and third embodiments of the present invention not only enables the input shaft 51 to rotate the output shaft 53 via the intermediate shaft 52 when the motor 40 drives the input shaft 51 to rotate, thereby driving the gear 22 to rotate. The coupling shaft assembly 50 of the present invention also allows the gear 22 and output shaft 53 to rotate freely when the seat is manually driven without driving the input shaft 51 to rotate, thereby preventing rotation of the rotor of the motor 40. The driving resistance is reduced, and the use experience of a user is improved.

Furthermore, in the second and third embodiments of the present invention, the input shaft 51 and the output shaft 53 are axially connected in a relatively rotatable manner by a rotating shaft, and the input shaft 51 and the output shaft 53 are axially limited by the rotating shaft, so that the input shaft 51 and the output shaft 53 can synchronously slide in the axial direction in the intermediate shaft 52.

In addition, the invention also provides a seat and a vehicle, wherein the seat comprises all the technical means of the seat sliding device, and the vehicle comprises the seat. The present invention also provides a driving apparatus including all the technical means of the above-described motor 40 and the connecting shaft assembly 50.

In summary, the seat sliding apparatus of the present invention not only enables the user to operate the control key of the motor 40 to make the rotating motor 40 switch the locking mechanism 60 from the locking state to the unlocking state through the connecting shaft assembly 50, but also automatically adjust the position of the seat; it is also possible for the user to switch the lock mechanism 60 from the locked state to the unlocked state by operating the handle 30, thereby manually and quickly adjusting the position of the seat. Therefore, the seat sliding device of the invention not only can realize the automatic adjustment of the seat, but also can enable the user to manually adjust the seat when the user needs to adjust the seat for a long distance. The user can be switched between automatic adjustment and manual adjustment at will, the operation comfort of the user is improved, and the use experience of the user is optimized. Further, the present invention also reduces the resistance when the seat slide apparatus is manually adjusted by the second embodiment.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims

1. A connecting shaft assembly, characterized in that the connecting shaft assembly comprises: the device comprises an input shaft, an output shaft and an intermediate shaft, wherein the input shaft and the output shaft are coaxially arranged, and the intermediate shaft is arranged between the input shaft and the output shaft in a manner of being coaxially connected with the input shaft and the output shaft in a sliding manner;

wherein the output shaft is free to rotate relative to the intermediate shaft without rotation of the input shaft, and

the input shaft drives the intermediate shaft to slide to a target position when rotating, so that the intermediate shaft and the output shaft are fixed in the circumferential direction, and the input shaft drives the output shaft to rotate by virtue of the intermediate shaft;

one of the intermediate shaft and the output shaft is provided with an internal spline, and the other of the intermediate shaft and the output shaft is provided with an external spline;

when the intermediate shaft is slid to the target position, the internal spline is engaged with the external spline, and thus the intermediate shaft and the output shaft are circumferentially fixed, and

the connecting shaft assembly is provided with a locking mechanism which can be switched between a locking state and an unlocking state, and the time for meshing the internal spline and the external spline is later than the time for switching the locking mechanism from the locking state to the unlocking state.

2. The connecting shaft assembly of claim 1, wherein one of the input shaft and the intermediate shaft is provided with a V-shaped groove, and the other of the input shaft and the intermediate shaft is provided with a stopper member that matches the V-shaped groove;

3. The connecting shaft assembly of claim 2, wherein the stop member is a pin or a ball.

4. The connecting shaft assembly according to claim 2, wherein the connecting shaft assembly further comprises a first spring disposed between the input shaft and the intermediate shaft, so that when the input shaft and the intermediate shaft stop rotating, the intermediate shaft is restored to an initial position by an elastic force of the first spring, and in the initial position, the stopper member is located at a middle bending portion of the V-shaped groove.

5. The connecting shaft assembly of claim 4 wherein the first spring is disposed at a bottom end of a first mating bore at one end of the intermediate shaft, the input shaft end fitting into the first mating bore against the first spring.

6. The connecting shaft assembly defined in claim 5, wherein an end of the input shaft proximate the intermediate shaft is provided with an input shaft bore, a portion of the first spring being received in the input shaft bore.

7. The connecting shaft assembly of claim 1, wherein an end of the intermediate shaft adjacent to the output shaft is provided with a second mating hole, the internal spline being disposed in the second mating hole;

8. A drive arrangement, characterized in that the drive arrangement comprises a motor and a connecting shaft assembly according to any one of claims 1 to 7, the rotating shaft of the motor being in driving connection with the input shaft.

9. A seat for movement by road wheels, the seat further comprising the drive arrangement of claim 8, the output shaft being in driving connection with the road wheels.

10. An automobile, characterized in that the automobile comprises a seat according to claim 9.