JP2015150915A - Seat device for vehicle and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat device for a vehicle which can suppress backlash between a pinion gear and a sector gear irrespective of variation in process tolerance of components, and a method for manufacturing the device.SOLUTION: In a method for manufacturing a seat device for a vehicle, a dummy member 70 which has a shape same as that of a pinion gear 41 is prepared, a washer 25 for positioning the pinion gear 41 is assembled to the dummy member 70, the dummy member 70 is engaged with a sector gear 50 via a through hole 24, the washer 25 and a support bracket 60 to which the dummy member 70 is assembled is pressed towards a rotation center of the sector gear 50 and the sector gear 50 is pressed towards a rotation center of the pinion gear 41, the washer 25 and the support bracket 60 which are in a pressed state are fixed to a seat cushion frame 23, the dummy member 70 is removed from the washer 25, and a motor 40 is assembled to the seat cushion frame 23 in a state such that the motor 40 is positioned by use of the washer 25.

Description

  The present invention relates to a vehicle seat device in which the height of a vehicle seat is adjusted according to the rotation of a sector gear meshed with a pinion gear of a motor, and a manufacturing method thereof.

  Conventionally, in a vehicle seat device in which the height of a vehicle seat is adjusted according to the rotation of a sector gear that meshes with a pinion gear of a motor, there is a backlash caused by backlash at a meshing portion between the pinion gear and the sector gear. Abnormal noise may occur. As a technique for preventing the occurrence of backlash and abnormal noise caused by such backlash, a vehicle seat height mechanism disclosed in Patent Document 1 is known.

  In this vehicle seat height mechanism, the sector gear has a three-layer structure, and the central plate has a rear half fixed between the left and right plates, and a tooth between the left and right plates and a diameter between the left and right plates. It is divided into a first half part that is movably held in the direction. The biasing member is disposed between the front half and the rear half of the central plate member, and the radial biasing force is applied to the front half of the central plate member, so that the front half teeth protrude beyond the overlapping teeth of the left and right plate members. And meshed with the teeth of the pinion gear. As a result, the front half of the plate member at the center of the sector gear protrudes in the radial direction under the urging force of the urging member and always meshes with the pinion gear, so as a sub gear that fills backlash between the pinion gear and the sector gear. Function. Therefore, backlash does not exist both when the height mechanism is not driven and when it is driven, and rattling and abnormal noise due to backlash are prevented.

JP 2009-001222 A

  By the way, in the configuration in which the sector gear has a three-layer structure as described above, it is necessary to process and assemble each plate material constituting the sector gear with high accuracy. If there is a variation in the backlash, there is a problem that backlash cannot be effectively suppressed. Further, even when the sector gear or the like is configured with another configuration, the same problem occurs when the processing accuracy of each component part varies.

  The present invention has been made to solve the above-described problems, and its object is to suppress the occurrence of backlash between the pinion gear and the sector gear without causing variations in the processing accuracy of the component parts. Another object of the present invention is to provide a vehicular seat device and a manufacturing method thereof.

  In order to achieve the above object, according to the invention of claim 1, the seat frame (23) for supporting the vehicle seats (21, 22) and the pinion gear (41) are provided on the rotating shaft. And a motor (40) assembled to the seat frame so that the rotating shaft passes through a through hole (24) formed in the seat frame, and meshed with the pinion gear while being pivotally supported by the seat frame. A vehicle seat device (10) comprising a sector gear (50) and a link mechanism (12, 13) for adjusting the height of the vehicle seat according to the rotation of the sector gear, wherein the penetration The hole is formed so that a washer (25) for positioning the motor is fixed, and the washer is a dummy member (70) having the same shape as the pinion gear. With meshed with the sector gear is positioned by Ssha while being pressed against the center of rotation of the sector gear, characterized in that it is fixed to the seat frame.

According to a third aspect of the present invention, a seat frame (23) for supporting the vehicle seat (21, 22) and a pinion gear (41) are provided on the rotating shaft, and the through hole (24) formed in the seat frame. , A motor (40) assembled to the seat frame so that the rotating shaft is inserted, a sector gear (50) meshed with the pinion gear while being pivotally supported by the seat frame, and rotation of the sector gear And a link mechanism (12, 13) for adjusting the height of the vehicle seat according to the method, and a dummy member (70) having the same shape as the pinion gear. And a washer (25) for positioning the pinion gear is assembled to the dummy member, and the dummy member is inserted through the through hole. A second step of engaging with the sector gear; a third step of pressing the washer assembled with the dummy member toward the rotation center of the sector gear; and fixing the washer in the pressed state to the seat frame. A fourth step; a fifth step of removing the dummy member from the washer; and a sixth step of assembling the motor to the seat frame in a state where the motor is positioned using the washer.
In addition, the code | symbol in each said parenthesis shows the correspondence with the specific means as described in embodiment mentioned later.

  In the invention of claim 1, the through hole formed in the seat frame is formed so that a washer for positioning the motor is fixed. The washer is fixed to the seat frame in a state where a dummy member having the same shape as the pinion gear of the motor is positioned by the washer and meshed with the sector gear and pressed toward the rotation center of the sector gear.

  In the invention of claim 3, a dummy member having the same shape as the pinion gear is prepared in the first step, and a washer for positioning the pinion gear is assembled to the dummy member in the second step. The member is engaged with the sector gear through the through hole, the washer assembled with the dummy member is pressed toward the rotation center of the sector gear in the third step, and the pressed washer is seat frame in the fourth step. In the fifth step, the dummy member is removed from the washer. In the sixth step, the motor is assembled to the seat frame in a state of being positioned using the washer.

  Thus, the backlash between the dummy member and the sector gear is minimized by pressing the dummy member toward the rotation center of the sector gear. By fixing the washer assembled with the dummy member to the seat frame in this pressed state, positioning the motor using the washer after the dummy member is removed may cause variations in processing accuracy of component parts such as the sector gear and the seat frame. Unaffected, backlash between pinion gear and sector gear is minimized. Therefore, it is possible to suppress the occurrence of backlash between the pinion gear and the sector gear without causing variations in processing accuracy of the component parts.

  In the second and fourth aspects of the invention, since the washer is fixed to the seat frame by welding, the washer can be easily and firmly fixed to the seat frame.

It is a side view of the vehicular seat device concerning this embodiment. It is a side view which shows the seat cushion frame with which the height mechanism was assembled | attached. It is a front view of the motor of FIG. It is a perspective view which shows the pinion gear side from the bracket of the motor of FIG. It is a perspective view which shows a dummy member. It is a side view which shows the state which assembled | attached the dummy member to the seat cushion frame so that it might mesh with a sector gear. It is a side view which shows the state which assembled | attached the support bracket to the seat cushion frame so that the front-end | tip part of a dummy member may be pivotally supported by a through hole. It is explanatory drawing which shows the state which pressed the washer using the jig | tool for pressing on one side of the seat cushion frame. It is explanatory drawing which shows the state which pressed the support bracket and the sector gear using the pressing jig on the other side of the seat cushion frame. It is explanatory drawing which shows the pressing state by each pressing jig | tool seen from the direction orthogonal to the side surface of a seat cushion frame.

  Hereinafter, an embodiment of a vehicle seat device and a manufacturing method thereof according to the present invention will be described with reference to the drawings. FIG. 1 is a side view of the vehicle seat device 10 according to the present embodiment. FIG. 2 is a side view showing the seat cushion frame 23 to which the height mechanism 30 is assembled. FIG. 3 is a front view of the motor 40 of FIG. 4 is a perspective view showing the pinion gear 41 side from the bracket 42 of the motor 40 of FIG.

  As shown in FIGS. 1 and 2, the vehicle seat device 10 according to the present embodiment mainly includes a base 11 fixed to the vehicle body B, a pair of front links 12 and a pair of rear links. A seat body 20 supported via the side links 13 and a height mechanism 30 that adjusts the height of the seat body 20 relative to the vehicle body B by tilting the rear side links 13 are provided.

  The seat body 20 includes a seat cushion frame 23 that supports the seat cushion 21 and a seat cushion frame that supports the seat back 22 in addition to the vehicle seat including the seat cushion 21 and the seat back 22. The seat body 20 is configured such that the seat back 22 is tiltably supported with respect to the seat cushion 21 by pivotally supporting the connecting shaft of the seat back frame on the upper end portion of the seat cushion frame 23 so as to be relatively rotatable. Has been.

  Each of the front links 12 has lower ends connected to the front portion of the base 11 so as to be relatively tiltable, and upper ends connected to the lower surface of the front portion of the seat cushion frame 23 so as to be relatively tiltable. The rear links 13 are supported such that their lower ends are connected to the base 11 so as to be relatively tiltable to the rear, and the upper ends are tilted according to the rotation of a sector gear 50 described later. Yes. As a result, a parallel link mechanism is configured, and the sheet main body 20 translates in a horizontal state with respect to the base 11.

As shown in FIG. 2, the height mechanism 30 mainly includes a motor 40, a sector gear 50, and a support bracket 60.
The motor 40 shown in FIGS. 3 and 4 is a driving means that exerts a driving force when adjusting the height of the seat body 20 with respect to the vehicle body B, and is configured as a geared motor having a deceleration function. The motor 40 is driven and controlled by a drive control device (not shown) to rotate a pinion gear 41 formed on the rotation shaft of the motor in a desired direction with a predetermined reduction ratio.

  The motor 40 is in a state where the rear end portion 41b and the front end portion 41a of the pinion gear 41 are pivotally supported by the washer 25 and the support bracket 60 which are welded and fixed to the outer edge portion of the through hole 24 of the seat cushion frame 23, respectively. The bracket 42 is fixed to one side surface 23 a of the seat cushion frame 23. Note that the through hole 24 and the outer edge portion of the seat cushion frame 23 are formed in a shape to which the washer 25 can be fixed by welding.

  The washer 25 is formed such that its burring inner edge can pivotally support the rear end portion 41b of the pinion gear 41, and a pair of welding projections 25a and a pair of pressing pin grooves 25b are formed on its outer edge. Has been. The washer 25 is a component in which the assembly accuracy with respect to the seat cushion frame 23 affects the backlash between the pinion gear 41 and the sector gear 50, and a detailed fixing method for the seat cushion frame 23 will be described later.

  The sector gear 50 functions to transmit the rotation of the motor 40 to both the rear links 13. The sector gear 50 is rotatably supported on the other side surface 23b of the seat cushion frame 23 by a shaft 26 fixed to the seat cushion frame 23, and is formed so as to always mesh with the pinion gear 41 of the motor 40. ing. Further, a through hole 51 is formed in the sector gear 50 so that a pin 63 welded and fixed to the seat cushion frame 23 does not interfere when the sector gear 50 rotates as will be described later.

  The support bracket 60 functions to pivotally support the distal end portion 41a of the pinion gear 41. The support bracket 60 is welded and fixed to the other side surface 23 b of the seat cushion frame 23 in a state where the tip end portion 41 a of the pinion gear 41 is pivotally supported by the through hole 61. A burring portion 62 for pressing is formed around the through hole 61.

  In the present embodiment, the welded portion exposed to the other end of the pin 63 whose one end is welded and fixed to the support bracket 60 and the through hole 27 formed in the seat cushion frame 23 as the welded portion with the seat cushion frame 23. 64 are prepared. Like the washer 25, the support bracket 60 is a component in which the assembly accuracy with respect to the seat cushion frame 23 affects the backlash between the pinion gear 41 and the sector gear 50, and a detailed fixing method for the seat cushion frame 23 Will be described later.

  By configuring the height mechanism 30 in this manner, when the motor 40 is driven to rotate in a predetermined direction, the sector gear 50 meshed with the pinion gear 41 rotates about the shaft 26. In accordance with the rotation of the sector gear 50, the rear links 13 are tilted, and the front links 12 are also tilted, whereby the seat body 20 is moved in parallel with the base 11 in a horizontal state. Become.

  Next, a method for fixing the washer 25 and the support bracket 60 to the seat cushion frame 23 will be described with reference to FIGS. FIG. 5 is a perspective view showing the dummy member 70. FIG. 6 is a side view showing a state in which the dummy member 70 is assembled to the seat cushion frame 23 so as to mesh with the sector gear 50. FIG. 7 is a side view showing a state in which the support bracket 60 is assembled to the seat cushion frame 23 so that the distal end portion 71 a of the dummy member 70 is pivotally supported by the through hole 61. FIG. 8 is an explanatory diagram showing a state in which the washer 25 is pressed using the pressing jig 81 on one side surface 23a of the seat cushion frame 23. As shown in FIG. FIG. 9 is an explanatory view showing a state in which the support bracket 60 and the sector gear 50 are pressed using the pressing jigs 82 and 83 on the other side surface 23b of the seat cushion frame 23. FIG. FIG. 10 is an explanatory view showing a pressing state by the pressing jigs 81 to 83 viewed from a direction orthogonal to the side surfaces 23a and 23b of the seat cushion frame 23.

  In the present embodiment, a dummy member 70 having the same shape as the pinion gear 41 is prepared in advance as the first step relating to the manufacturing method. The dummy member functions as a fixing jig made of the same material as the motor shaft, and includes a gear portion 71 having the same shape as the pinion gear 41 as shown in FIG. Further, the gear portion 71 is formed with a front end portion 71a and a rear end portion 71b corresponding to the front end portion 41a and the rear end portion 41b of the pinion gear 41, and further has a large diameter portion 72 having a diameter larger than that of the rear end portion 71b. Is formed.

Next, a process of welding the washer 25 and the support bracket 60 to the seat cushion frame 23 using the dummy member 70 formed as described above will be described.
First, as shown in FIG. 6, as shown in FIG. 6, the sector gear 50 is assembled to the shaft 26 fixed to the seat cushion frame 23, and the dummy member 70 with the washer 25 is assembled to the sector gear 50 through the through hole 24. Engage. At this time, the gear portion 71 is inserted from the side surface 23 a side into the through hole 24 of the seat cushion frame 23, the gear portion 71 meshes with the sector gear 50, and the side surface of the washer 25 on the edge around the through hole 24. Is pressed.

  Subsequently, as shown in FIG. 7, the support bracket 60 is pivotally supported by the through hole 61 at the tip 71 a of the gear portion 71 with the other end of the pin 63 inserted into the through hole 28 of the seat cushion frame 23. As shown, the seat cushion frame 23 is assembled. At this time, the welded portion 64 is exposed through the through hole 27 on the one side surface 23 a of the seat cushion frame 23.

  Then, as a third step, the washer 25 and the support bracket 60 are pressed toward the rotation center of the sector gear 50 and the sector gear 50 is pressed toward the rotation center of the gear portion 71 using a pressing jig. Specifically, as shown in FIGS. 8 and 10, using a pressing jig 81 in which a protrusion 81a that can be engaged with the pin groove 25b of the washer 25 is formed on one side surface 23a of the seat cushion frame 23. Then, the washer 25 is pressed toward the rotation center of the sector gear 50 in a state where the washer 25 is prevented from rotating. Further, using a pressing jig 82 having a pressing surface formed in a V shape, the burring portion 62 of the support bracket 60 is mounted on the other side surface 23b of the seat cushion frame 23 as shown in FIGS. Press toward the rotation center of the sector gear 50. Further, using a pressing jig 83 that can be mounted on the shaft 26, the sector gear 50 is rotated together with the shaft 26 on the other side surface 23 b of the seat cushion frame 23, as shown in FIGS. 9 and 10. Press toward the center.

  In this pressed state, the backlash between the gear portion 71 of the dummy member 70 and the sector gear 50 is substantially zero.

  And as a 4th process, the washer 25 and the support bracket 60 are weld-fixed to the seat cushion frame 23 by the above pressing states. Specifically, the washer 25 is welded and fixed to the outer edge portion of the through hole 24 of the seat cushion frame 23 by using both protrusions 25a. Further, the support bracket 60 is welded and fixed to the one side surface 23 a of the seat cushion frame 23 using the other end of the pin 63 inserted into the through hole 28 and the welded portion 64 exposed through the through hole 27.

  Then, as a fifth step, the dummy member 70 is removed from the washer 25. At this time, since the washer 25 is welded and fixed to the one side surface 23a of the seat cushion frame 23, the assembly position with respect to the seat cushion frame 23 is maintained even when the dummy member 70 is removed.

  Then, as a sixth step, the bracket 42 of the motor 40 is attached to the seat cushion frame 23 in a state where the pinion gear 41 is inserted into the washer 25 from the one side surface 23 a side and the pinion gear 41 is engaged with the sector gear 50. Fix it. Thereby, the assembly of the height mechanism 30 is completed.

  As described above, in the vehicle seat device 10 according to the present embodiment, the through hole 24 formed in the seat cushion frame 23 is formed so that the washer 25 for positioning the motor 40 is fixed. . The washer 25 is a state in which a dummy member 70 having the same shape as the pinion gear 41 of the motor 40 is positioned by the washer 25 and meshed with the sector gear 50 and pressed toward the rotation center of the sector gear 50. It is fixed to the seat cushion frame 23.

  Further, in the method for manufacturing the vehicle seat device 10 according to the present embodiment, the dummy member 70 having the same shape as the pinion gear 41 is prepared (first step), and the washer 25 for positioning the pinion gear 41 is the dummy member. 70, the dummy member 70 is meshed with the sector gear 50 through the through hole 24 (second step), and the washer 25 and the support bracket 60 assembled with the dummy member 70 rotate the sector gear 50. The sector gear 50 is pressed toward the center and pressed toward the rotation center of the gear portion 71 of the dummy member 70 (third step), and the pressed washer 25 and the support bracket 60 are fixed to the seat cushion frame 23 ( (4th process), the dummy member 70 is removed from the washer 25 (5th process), Motor 40 is assembled to the seat cushion frame 23 in a state of being positioned with the washer 25 (sixth step).

  Thus, the backlash between the dummy member 70 and the sector gear 50 is minimized by pressing the dummy member 70 toward the rotation center of the sector gear 50. When the motor 40 is positioned using the washer 25 after removing the dummy member 70 by welding and fixing the washer 25 assembled with the dummy member 70 to the seat cushion frame 23 in this pressed state, the sector gear 50 and the seat cushion frame The backlash between the pinion gear 41 and the sector gear 50 is minimized without being affected by variations in the machining accuracy of components such as 23. Therefore, the occurrence of backlash between the pinion gear 41 and the sector gear 50 can be suppressed without causing variations in processing accuracy of the component parts.

  Further, since the washer 25 and the support bracket 60 are fixed to the seat cushion frame 23 by welding, the washer 25 and the support bracket 60 can be easily and firmly fixed to the seat cushion frame 23. As a welding method, a welding method such as arc welding, projection welding, or laser welding can be employed. Further, as a method of fixing the washer 25 and the support bracket 60 to the seat cushion frame 23, instead of the method of fixing by welding, for example, a method of fixing by caulking by providing rivets or the like may be employed.

In addition, this invention is not limited to the said embodiment, For example, you may actualize as follows.
(1) The washer 25, the support bracket 60, the motor 40, etc. are not limited to being fixed to the seat cushion frame 23, but may be fixed to the seat back frame on which the seat back 22 is supported. In this case, the said effect is show | played by employ | adopting the fixing method which concerns on this invention.

DESCRIPTION OF SYMBOLS 10 ... Vehicle seat apparatus 20 ... Seat main body 23 ... Seat cushion frame (seat frame)
25 ... Washer 30 ... Height mechanism 40 ... Motor 41 ... Pinion gear 50 ... Sector gear 60 ... Support bracket 70 ... Dummy member 81-83 ... Jig for pressing

Claims (4)

A seat frame for supporting a vehicle seat;
A motor mounted on the seat frame such that a pinion gear is provided on the rotating shaft and the rotating shaft is inserted through a through hole formed in the seat frame;
A sector gear that meshes with the pinion gear while being pivotally supported by the seat frame;
A link mechanism for adjusting the height of the vehicle seat according to the rotation of the sector gear;
A vehicle seat device comprising:
The through hole is formed such that a washer for positioning the motor is fixed,
The washer is fixed to the seat frame in a state where a dummy member having the same shape as the pinion gear is positioned by the washer and meshed with the sector gear and pressed toward the rotation center of the sector gear. A vehicle seat device.   The vehicle seat device according to claim 1, wherein the washer is fixed to the seat frame by welding. A seat frame for supporting a vehicle seat;
A motor mounted on the seat frame such that a pinion gear is provided on the rotating shaft and the rotating shaft is inserted through a through hole formed in the seat frame;
A sector gear that meshes with the pinion gear while being pivotally supported by the seat frame;
A link mechanism for adjusting the height of the vehicle seat according to the rotation of the sector gear;
A vehicle seat device manufacturing method comprising:
A first step of preparing a dummy member having the same shape as the pinion gear;
A second step of assembling a washer for positioning the pinion gear to the dummy member and engaging the dummy member with the sector gear through the through hole;
A third step of pressing the washer assembled with the dummy member toward the rotation center of the sector gear;
A fourth step of fixing the pressed washer to the seat frame;
A fifth step of removing the dummy member from the washer;
A sixth step of assembling the motor in the seat frame in a state where the motor is positioned using the washer;
A method for manufacturing a vehicle seat device.   The method for manufacturing a vehicle seat device according to claim 3, wherein, in the fourth step, the washer in the pressed state is fixed to the seat frame by welding.

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