JP4414158B2 - Assembly method of the reclining device on both sides - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes a first lower arm and a second lower arm attached to a side portion of a seat cushion, a first upper arm and a second upper arm attached to a side portion of a seat back, and the first lower arm and the first upper arm. The first upper arm is tilted with respect to the first lower arm by rotating the shaft, and the second reclining mechanism is attached to the second lower arm and the second upper arm. The first reclining mechanism comprises a second reclining mechanism in which a two upper arm tilts with respect to the second lower arm, a shaft of the first reclining mechanism, a shaft of the second reclining mechanism, and a connecting pipe connected to these shafts. The movement of the shaft A transmission mechanism for transmitting to the shaft of the reclining mechanism, a large-diameter gear provided on the shaft of the first reclining mechanism, a motor bracket provided on the first upper arm, and an output shaft provided on the motor bracket A motor to which a small-diameter gear that meshes with the large-diameter gear is attached; a cover that is formed integrally with the motor bracket, covers the small-diameter gear, the large-diameter gear, and has a hole through which the transmission mechanism is inserted; , have a, in the cover, extending from the edge to the hole, a method for assembling the transmission mechanism to either side reclining device formed a cutout groove for guiding the outside of the cover to the hole of the cover.
[0002]
[Prior art]
In a reclining device in which the reclining mechanism is provided on both sides of the seat, when the seat back is tilted by the motor, the motor is provided on one upper arm side of a pair of upper arms attached to the side portion of the seat back, and the other side of the seat The power is transmitted to the reclining mechanism on the side of the side by using a transmission mechanism including a shaft of the reclining mechanism and a connecting pipe that connects the shafts of the reclining mechanism.
[0003]
The motor output is decelerated and input to the reclining mechanism. In general, the speed is reduced by a gear train comprising a small-diameter gear provided on the output shaft of the motor and a large-diameter gear provided on the shaft of the reclining mechanism and meshing with the small-diameter gear.
[0004]
If the small-diameter gear and the large-diameter gear are exposed to the outside, dust or the like adheres to cause malfunction, so a cover is provided to cover these gears and prevent the dust or the like from adhering. The cover is formed integrally with a motor bracket that attaches the motor to the upper arm, and the cover is provided with a hole through which the shaft or connecting pipe of the reclining mechanism is inserted (see, for example, Patent Document 1).
[0005]
[Patent Document 1]
Japanese Utility Model Publication No. 4-115433 (FIGS. 1, 2, 3, 4, and 5)
[0006]
[Problems to be solved by the invention]
However, the configuration described in Patent Document 1 has the following problems.
(1) Since the cover formed integrally with the motor bracket is provided with a hole through which the output shaft of the reduction gear train and the connecting pipe can be inserted, the assembly order includes the motor and the integrated motor. A bracket and cover are attached, and then a connecting pipe is attached.
[0007]
For this reason, since the motor is attached at the initial stage of assembly, the motor may be damaged due to dropping or the like during the subsequent movement to the assembly process.
(2) Since the connecting pipe is attached to the shaft of the reclining mechanism by welding, the resin parts of the motor are damaged by welding sparks, welding spatter adheres to the small diameter gear of the motor, There is an adverse effect.
[0008]
The present invention has been made in view of the above problems, and its problem is to provide a method for assembling a double-sided reclining device in which damage to the motor during assembly is reduced and there is no trouble due to connection pipe welding during assembly. It is in.
[0009]
[Means for Solving the Problems]
According to a first aspect of the present invention for solving the above problem, a first lower arm and a second lower arm attached to a side portion of a seat cushion, a first upper arm and a second upper arm attached to a side portion of a seat back, and the first A lower arm, attached to the first upper arm, and attached to the first reclining mechanism in which the first upper arm tilts with respect to the first lower arm by rotating its shaft, the second lower arm, and the second upper arm; A second reclining mechanism in which the second upper arm tilts with respect to the second lower arm by rotating the shaft, a shaft of the first reclining mechanism, a shaft of the second reclining mechanism, and a connection connected to these shafts A first reclinin comprising a pipe A transmission mechanism for transmitting the movement of the shaft of the mechanism to the shaft of the second reclining mechanism, a large-diameter gear provided on the shaft of the first reclining mechanism, a motor bracket provided on the first upper arm, and the motor A motor provided on a bracket and having a small-diameter gear that meshes with the large-diameter gear on an output shaft; and a motor bracket that is integrally formed to cover the small-diameter gear and the large-diameter gear; a cover hole for inserting is formed, possess, on the cover, extending from the edge to the hole, to form a notch groove for guiding the transmission mechanism from the outside of the cover to the hole of the cover on both sides a method of assembling the reclining device, the communication with the shaft of the shaft and the second recliner mechanism of the first recliner mechanism After attaching the pipe, the transmission mechanism is inserted into the cutout groove of the cover, a method of assembling the both side reclining apparatus characterized by attaching a motor bracket the motor is attached to said first upper arm.
[0010]
The cover is formed with a notch groove extending from an edge thereof to the hole and guiding the transmission mechanism from the outside of the cover to the hole of the cover, whereby the shaft of the first reclining mechanism and the second reclining mechanism A connecting pipe is attached to the shaft, and the motor, the integrated motor bracket, and the cover can be assembled at the end of the assembly process. Therefore, when moving to the assembly process, the motor is not damaged by dropping or the like. In addition, when welding the reclining mechanism to the shaft of the reclining mechanism, the plastic parts of the motor are damaged by welding sparks, welding spatter adheres to the small-diameter gear of the motor, and there is no adverse effect on the motor core due to arc current. .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of an inventive part of a double-sided reclining device according to an embodiment of the present invention. In the figure, the first lower arm 20 is provided on one side of the seat cushion, and the second lower arm 120 is provided on the other side of the seat cushion. The first upper arm 10 is provided on one side of the seat back, and the second upper arm 110 is provided on the other side of the seat back.
[0012]
The first reclining mechanism 30 is attached to the first lower arm 20 and the first upper arm 10, and the first upper arm 10 tilts with respect to the first lower arm 20 by rotating its shaft 33. Similarly, the second reclining mechanism 130 is attached to the second lower arm 120 and the second upper arm 110, and the second upper arm 110 tilts with respect to the second lower arm 120 by rotating its shaft 133. . The shaft 33 of the first reclining mechanism 30 and the shaft 133 of the second reclining mechanism 130 are connected by a connecting pipe 201, and the shaft 33 of the first reclining mechanism 30, the shaft 133 of the second reclining mechanism 130, and the connecting pipe. 201 constitutes a transmission mechanism that transmits the movement of the shaft 33 of the first reclining mechanism 30 to the shaft 133 of the second reclining mechanism 130.
[0013]
A large-diameter gear 100 is provided on the shaft 33 of the first reclining mechanism 30. A motor 231 is attached to the first upper arm 10 via a motor bracket 211. The output shaft 233 of the motor 231 is inserted through the hole 213 of the motor bracket 211 and a small diameter gear 235 that meshes with the large diameter gear 100 is attached.
[0014]
The motor bracket 211 is integrally formed with a cover 212 formed so as to cover the small diameter gear 235 and the large diameter gear 100. As shown in FIG. 2, the cover 212 has a hole 215 through which the shaft 33 of the first reclining mechanism 30 is inserted, and extends from the edge to the hole 215, and includes a shaft 133 as a transmission mechanism, and a connection pipe 201. A notch groove 217 for guiding at least one of them (in the present embodiment, the connecting pipe 201) from the outside of the cover 212 to the hole 215 is formed.
[0015]
Here, the first reclining mechanism 30 and the second reclining mechanism 130 will be described with reference to FIGS. In addition, since the 1st reclining mechanism 30 and the 2nd reclining mechanism 130 are mutually target structures, it demonstrates using the 1st reclining mechanism 30 and description of the 2nd reclining mechanism 130 is abbreviate | omitted.
[0016]
A plurality of columnar protrusions 31 a and 32 a that are fitted to the fitting hole 21 of the first lower arm 20 and the fitting hole 11 of the first upper arm 10 in the external gear 31 and the internal gear 32 in the first reclining mechanism 30. Is provided.
[0017]
The external gear 31 has a substantially disk shape, an external tooth 31b is formed on the outer peripheral surface, and a cylindrical portion 31f extending in the direction of the internal gear 32 is formed at the center. The external gear 31 is positioned by inserting a plurality (six) of protrusions 31 a formed on the side surface into the fitting hole 11 of the first upper arm 10. After this positioning, the external gear 31 is welded to the first upper arm 10. Is done.
[0018]
The internal gear 32 also has a substantially disk shape. The internal gear 32 is formed with internal teeth 32b that are inscribed with the external teeth 31b and that have at least one more tooth than the external teeth 31b of the external gear 31. A circular through hole 32 f is formed in the center of the internal gear 32. The cylindrical portion 31f of the external gear 31 is inserted through the through hole 32f. The internal gear 32 is positioned by fitting a plurality (six) of cylindrical protrusions 32 a on the side surface into the fitting hole 21 of the first lower arm 20, and is welded to the first lower arm 20 after this positioning.
[0019]
Of the opposing surfaces of the external gear 31 and the internal gear 32, a concave portion 31c is formed on the opposing surface of the external gear 31 so that a substantially arc-shaped space is formed, and on the opposing surface of the internal gear 32, A protruding portion 32c protruding into the recessed portion 31c is formed. Since the internal gear 32 in the first reclining mechanism 30 adjusts the inclination angle of the seat back, it naturally rotates with respect to the external gear 31, but its rotational range is restricted within a certain range. There is also a need to do. The concave portion 31c and the convex portion 32c function as the rotation regulating stopper, and the convex portion 32c is brought into contact with the side wall 31d of the concave portion 31c so that the rotation of the external gear 31 is within a certain range. It is regulated.
[0020]
A neck portion 33a of a shaft 33 with a flange is rotatably fitted in the cylindrical portion 31f of the external gear 31. The shaft 33 has a flange portion (striker) 33b, a neck portion 33a, an annular groove 33d formed in the neck portion 33a, a first serration portion 33i to which the large diameter gear 100 is attached, and a small diameter portion 33j to which the connection pipe 201 is attached. . An arcuate cutout 33c is formed in the flange 33b. The shaft 33 is rotationally driven when adjusting the inclination angle of the seat back.
[0021]
A cylindrical bush 34 having excellent wear resistance is fitted into and fixed to the through hole 32f of the internal gear 32. Further, a pair of wedge-shaped members 35 and 36 are inserted between the inner cylindrical surface of the bush 34 and the outer cylindrical surface of the cylindrical portion 31 f of the external gear 31 so as to be in contact with both.
[0022]
The wedge-shaped members 35 and 36 have a plane symmetrical shape. The wedge-shaped member 35, the inner cylindrical surface 35a of the wedge-shaped member 36, and the inner cylindrical surface 36a have substantially the same inner diameter as the cylindrical surface 31f of the external gear 31 and the outer cylindrical surface of the wedge-shaped member 35 and the wedge-shaped member 36. 35 b and the outer cylinder surface 36 b have substantially the same outer diameter as the inner diameter of the bush 34. The wedge-shaped member 35, the inner cylindrical surface 35a of the wedge-shaped member 36, the inner cylindrical surface 36a and the outer cylindrical surface 35b, and the outer cylindrical surface 36b are changed in a wedge shape because their center axes do not coincide with each other. Further, the wedge-shaped member 35 and the wedge-shaped member 36 are formed with a fin portion 35e and a fin portion 36e that can come into contact with the distal end surface of the cylindrical portion 31f of the external gear 31.
[0023]
In this embodiment, the wedge-shaped member 35, the inner cylindrical surface 35a of the wedge-shaped member 36, the outer peripheral surface of the cylindrical portion 31f of the external gear 31 facing the inner cylindrical surface 36a, the wedge-shaped member 35, and the wedge-shaped member 36 The outer cylindrical surface 35 b and the inner cylindrical surface of the bush 34 (the inner peripheral surface of the through hole 32 f of the internal gear 32) facing the outer cylindrical surface 36 b are located at substantially the same position in the axial direction of the shaft 33.
[0024]
As shown in FIG. 4, a flange portion 33 b as a striker integrally formed with the shaft 33 is formed in the space between the thin-walled side end surface 35 c of the wedge-shaped member 35 and the thin-walled side end surface 36 c of the wedge-shaped member 36. It is overhanging. Therefore, when the shaft 33 rotates counterclockwise in FIG. 4, the side wall 33g of the notch 33c of the shaft 33 contacts the side end surface 35c of the wedge-shaped member 35, and conversely, the shaft 33 rotates clockwise in FIG. , The side wall 33h of the notch 33c of the shaft 33 comes into contact with the side end surface 36c of the wedge-shaped member 36 on the opposite side.
[0025]
The wedge-shaped member 35 and the wedge-shaped member 36 are disposed between the inner cylindrical surface of the bush 34 and the outer cylindrical surface of the cylindrical portion 31f of the external gear 31 so that the thick side faces each other. The internal gear 32 is eccentric, and the internal teeth 32b are engaged with the external teeth 31b. By means of the wedge-shaped member 35 and the wedge-shaped member 36, the shaft 33 meshes the internal teeth 32b and the external teeth 31b, and revolves one of the external gear 31 and the internal gear 32 around the other gear shaft. it can. The wedge-shaped members 35 and 36 receive a biasing force in a direction away from the spring 37.
[0026]
The spring 37 includes an annular portion 37a having an intermediate portion of one turn and end portions 37b and 37c rising from the annular portion 37a. The annular portion 37a is a space between the internal gear 32 and the external gear 31. In other parts, in the present embodiment, the shaft 33 is disposed between the internal gear 32 and the first lower arm 20. Further, the end portion 37b is engaged with a groove portion 35d formed on the side wall surface on the thick side of the wedge-shaped member 35, and the end portion 37c is formed on a groove portion 36d formed on the side wall surface on the thick side of the wedge-shaped member 36. It is locked. Further, the first lower arm 20 is set to a shape that covers the internal gear 32.
[0027]
The cylindrical pressing member 38 is fitted to the outer peripheral surface of the internal gear 32, and both end portions thereof protrude toward the central axis, and sandwich the external gear 31 and the internal gear 32. Thereby, it can control that the external gear 31 and the internal gear 32 leave | separate in an axial direction. Note that a ring 39 for retaining is retained in the annular groove 33d of the shaft 33.
[0028]
Next, the operation of the first reclining mechanism 30 will be described. In a state where no rotational operation force is applied to the shaft 33 from the outside, the spring 37 biases the wedge-shaped members 35 and 36 away from each other, and applies a force in the direction in which the wedges are driven into the wedge-shaped members 35 and 36. For this reason, the relative movement between the internal gear 32 and the shaft 33 is prohibited, and the first reclining mechanism 30 is in a locked state in which the external teeth 31b of the external gear 31 and the internal teeth 32b of the internal gear 32 mesh with each other. The seat back is locked in that position.
[0029]
When the motor 231 is driven in this locked state, the rotation is decelerated by the meshing of the small diameter gear 235 and the large diameter gear 100 and transmitted to the shaft 33 of the first reclining mechanism 30. Further, it is transmitted to the shaft 133 of the second reclining mechanism 130 via the connecting pipe 201.
[0030]
For example, when the shaft 33 is rotated counterclockwise in FIG. 4, a force in a direction of pulling out the wedge-shaped member 35 from the gap from the side wall 33g of the shaft 33 to the side end surface 35c of the wedge-shaped member 35 acts. It rotates counterclockwise with respect to the tooth gear 32. As a result, a gap is generated between the wedge-shaped member 35 and the peripheral member, and the internal gear 32 can be moved. Then, the wedge-shaped member 36 receiving the urging force of the spring 37 rotates counterclockwise so as to fill this gap. By this interlocking operation, the wedge-shaped members 35 and 36 rotate counterclockwise together with the shaft 33. The same applies to the clockwise rotation. Therefore, the internal gear 32 is supported by the shaft 33 at an eccentric position where the internal teeth 32b mesh with the external teeth 31b, and the external gear 31, the internal gear 32, and the shaft 33 constitute a gear mechanism. Will be.
[0031]
Thus, by rotating the shaft 33, the meshing position of the external teeth 31 b of the external gear 31 and the internal teeth 32 b of the internal gear 32 changes, and the first upper arm 10 is tilted with respect to the first lower arm 20. The inclination angle of the seat back can be adjusted.
[0032]
According to the above configuration, the cover 212 formed integrally with the motor bracket 211 has the hole 215 through which the shaft 33 of the first reclining mechanism 30 is inserted, and extends from the edge portion to the hole 215, and the shaft 133 as a transmission mechanism. The notch groove 217 that guides at least one of the connecting pipes 201 (in this embodiment, the connecting pipe 201) from the outside of the cover 212 to the hole 215 is formed, so that the shaft 33 of the first reclining mechanism 30 is formed. The connecting pipe 201 is attached to the shaft 133 of the second reclining mechanism 130, and the motor 231, the motor bracket 211, and the cover 212 that are integrated at the end of the assembly process can be assembled. Therefore, when moving to the assembly process, the motor 231 is not damaged by dropping or the like.
[0033]
Further, when the connecting pipe 201 is welded to the shafts 33 and 133 of the reclining mechanisms 30 and 130, the resin parts of the motor 231 are damaged by welding sparks, or welding spatter adheres to the small-diameter gear 235 of the motor 231. The adverse effect on the motor core due to the arc current is eliminated.
[0035]
【The invention's effect】
As described above, according to the present invention, the cover is formed with the notch groove extending from the edge portion to the hole and guiding the transmission mechanism from the outside of the cover to the hole of the cover. A connecting pipe is attached to the shaft of the first reclining mechanism and the shaft of the second reclining mechanism, and the motor, the integrated motor bracket, and the cover can be assembled at the end of the assembling process.
[0036]
Therefore, when moving to the assembly process, the motor is not damaged by dropping or the like.
[0037]
In addition, when welding the reclining mechanism to the shaft of the reclining mechanism, the plastic parts of the motor are damaged by welding sparks, welding spatter adheres to the small-diameter gear of the motor, and there is no adverse effect on the motor core due to arc current. .
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of an inventive part of a double-sided reclining device according to an embodiment of the present invention.
2A and 2B are diagrams for explaining the integrated motor bracket and cover of FIG. 1, wherein FIG. 2A is a view taken in the direction of arrow A in FIG. 1, and FIG. 2B is a right side view of FIG. .
FIG. 3 is a longitudinal sectional view seen from a direction B in FIG.
4 is a left side view of FIG. 3 (the upper arm and the lower arm are deleted);
FIG. 5 is a right side view of FIG. 3 (the upper arm and the lower arm are deleted);
FIG. 6 is an exploded perspective view of a main part of the first reclining mechanism.
[Explanation of symbols]
10 First upper arm 20 First lower arm 30 First reclining mechanism 33 Shaft 100 Large diameter gear 201 Connection pipe 211 Motor bracket 231 Motor 235 Small diameter gear 215 Hole 217 Notch groove

Claims (1)

A first lower arm and a second lower arm attached to a side portion of the seat cushion;
A first upper arm and a second upper arm attached to the side portion of the seat back;
A first reclining mechanism attached to the first lower arm and the first upper arm and rotating the shaft thereof so that the first upper arm tilts with respect to the first lower arm;
A second reclining mechanism attached to the second lower arm and the second upper arm, and rotating the shaft thereof so that the second upper arm tilts with respect to the second lower arm;
A transmission mechanism that includes a shaft of the first reclining mechanism, a shaft of the second reclining mechanism, and a connecting pipe connected to the shafts, and transmits the movement of the shaft of the first reclining mechanism to the shaft of the second reclining mechanism; ,
A large-diameter gear provided on the shaft of the first reclining mechanism;
A motor bracket provided on the first upper arm;
A motor provided on the motor bracket and having an output shaft attached with a small-diameter gear meshing with the large-diameter gear;
A cover formed integrally with the motor bracket, covering the small-diameter gear, the large-diameter gear, and having a hole through which the transmission mechanism is inserted;
I have a,
In the assembling method of the reclining device on both sides, the notch groove extending from the edge to the hole in the cover and guiding the transmission mechanism from the outside of the cover to the hole of the cover is formed .
After attaching the connection pipe to the shaft of the first reclining mechanism and the shaft of the second reclining mechanism,
A method of assembling a double-side reclining device , wherein the transmission mechanism is inserted into a notch groove of the cover, and a motor bracket to which the motor is attached is attached to the first upper arm .

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