Output gear and window regulator system

Abstract

To provide an output gear and a window regulator system capable of suppressing core vibration.SOLUTION: An output gear 32 is pivotally fixed to an output shaft 42 of a motor 31 with a speed reducer including the output shaft 42 comprising a serration formation part 51 and a shaft-like part 52 connected to the serration formation part 51, and it is engaged with a sector gear 25 of a window regulator 11. The output gear includes: a serration press-fitting part 61 which is press-fitted into a serration 51a of the serration formation part 51; and a gear formation part 62 which is connected to the serration press-fitting part 61, in which a gear part 71a engaged with the sector gear 25 is formed on an outer peripheral surface, and in which the shaft-like part 52 enters inside. The gear formation part 62 has a press-fitting protrusion part 72a which is press-fitted into the shaft-like part 52 from a tip side in an axial direction.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an output gear and window regulator system. [Background technology]

[0002] Conventionally, as an output gear, for example, there is a pinion gear that is attached to the output shaft of a drive motor and meshes with the sector gear of an arm-type window regulator (see Patent Document 1). This pinion gear is serrated and connected to the output shaft, and the meshing position with the sector gear is shifted axially forward from the connection position with the output shaft. This pinion gear allows a drive motor with a serrated output shaft to be connected to the sector gear of an arm-type window regulator, making it possible to use a drive motor with a serrated output shaft for an arm-type window regulator. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-248831 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional pinion gear described above, a strong reaction force from the sector gear acts on the pinion gear in a direction away from the sector gear, causing the tip of the pinion gear to run out of center (axial wobble).

[0005] Therefore, an object of the present invention is to provide an output gear and a window regulator system capable of suppressing core runout. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides an output gear that is attached to an output shaft of a motor with a reducer, the output shaft having a serration-forming portion and a shaft-shaped portion connected to the serration-forming portion, and that meshes with an input gear of a window regulator, the output gear comprising: a first press-fit portion press-fitted into the serrations of the serration-forming portion; and a gear-forming portion connected to the first press-fit portion, having a gear portion formed on its outer circumferential surface that meshes with the input gear, and into which the shaft-shaped portion fits, the gear-forming portion having a second press-fit portion press-fitted into the shaft-shaped portion from its axial end. Note that the term "press-fit" as used herein is a concept that includes not only internal press-fitting but also external press-fitting.

[0007] In order to achieve the above object, the present invention also provides a window regulator system comprising the above output gear, the motor with a speed reducer, and the window regulator. Effect of the Invention

[0008] The output gear and window regulator system according to the present invention can suppress runout. [Brief description of the drawings]

[0009] [Figure 1] 1 is an overall schematic view showing a window regulator according to an embodiment of the present invention and a door of an automobile on which the window regulator is provided. [Diagram 2] FIG. 2 is a front view showing the window regulator. [Diagram 3] FIG. 2A is a perspective view showing the window regulator from which the glass holder is omitted, and FIG. 2B is a perspective view showing the window regulator from which the glass holder, the support base, and the gear cover are omitted. [Figure 4] 1A is a cross-sectional view taken along line A-A' showing the output shaft and the output gear, FIG. 1B is a cross-sectional view taken along line A-A' showing the output shaft, and FIG. 1C is a cross-sectional view taken along line A-A' showing the output gear. [Diagram 5]1A and 1B are a front view and a side view showing a motor with a reducer. [Figure 6] 1A is a front view, FIG. 1B is a side view, and FIG. 1C is a rear view showing the output gear. [Figure 7] 1A is a rear view of the output gear, a cross-sectional view of the output shaft and output gear, and a front view of the output shaft, showing the output shaft and output gear of a first modified example; FIG. 1B is a rear view of the output gear, a cross-sectional view of the output shaft and output gear, and a front view of the output shaft, showing the output shaft and output gear of a second modified example; and FIG. 1C is a rear view of the output gear, a cross-sectional view of the output shaft and output gear, and a front view of the output shaft, showing the output shaft and output gear of a third modified example. [Figure 8] 1A is a cross-sectional view showing the output shaft and output gear of a fourth modified example, FIG. 1B is a cross-sectional view showing the output shaft and output gear of a fifth modified example, and FIG. 1C is a cross-sectional view showing the output shaft and output gear of a sixth modified example. [Figure 9] 13A is a cross-sectional view showing the output shaft and output gear of a seventh modified example, FIG. 13B is a cross-sectional view showing the output shaft and output gear of an eighth modified example, and FIG. 13C is a cross-sectional view showing the output shaft and output gear of a ninth modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a window regulator system according to an embodiment of the present invention will be described with reference to the accompanying drawings. This window regulator system is a lifting device that is attached to the inside of a door provided in an automobile (vehicle) and lifts and lowers the window glass of the door. In particular, this window regulator system suppresses the core runout of the output gear by improving the output gear that is axially attached to the output shaft of a motor with a reducer, thereby suppressing wear of the gear part and generation of abnormal noise caused by the core runout. In the following, the direction in which the window glass is raised and lowered will be simply referred to as the lifting and lowering direction. In addition, in the following, the left and right, front and rear, and up and down will be defined as shown in each figure. Furthermore, the up and down direction of the window regulator system shown in each figure coincides with the direction in which the window glass is raised and lowered.

[0011] Fig. 1 is an overall schematic diagram showing a window regulator system 1 in a fully closed state of a window glass G and a door D of an automobile on which the window regulator system 1 is provided, Fig. 2 is a front view showing the window regulator system 1, and Fig. 3 is a perspective view showing the window regulator system 1. As shown in Figs. 1 to 3, the window regulator system 1 is attached to an inner panel P (door panel on the inside of the vehicle) of the door D, and includes a window regulator 11 (operating unit) that raises and lowers the window glass G, and a drive unit 12 that drives the window regulator 11.

[0012] The window regulator 11 includes two glass holders 21, 21 fixed to the lower end of the window glass G, a first channel 22 supported so as to be movable up and down and to which the window glass G is attached via the two glass holders 21, 21, a lift arm 23 and a sub-arm 24 whose tip ends 23a, 24a are respectively connected to the first channel 22 and which move the first channel 22 up and down in the lifting direction, and a sector gear 25 (input gear) fixed to a base end 23b of the lift arm 23 and to which power from the drive unit 12 is input. The window regulator 11 also includes a support base 26 fixed to the inner panel P and which rotatably supports the lift arm 23 via a support shaft 26a, and a second channel 27 fixed to the inner panel P and to which the base end 24b of the sub-arm 24 is connected. That is, the window regulator 11 is an X-arm type window regulator.

[0013] The tip 23a of the lift arm 23 is connected to the first channel 22 via a first slider (not shown) so as to be slidable in the left-right direction. When the lift arm 23 rotates around the support shaft 26a, the tip 23a of the lift arm 23 moves in the lifting direction while sliding in the left-right direction, and the tip 23a pushes up or pulls down the first channel 22 in the lifting direction.

[0014] The sub-arm 24 is formed by joining two arm-shaped members 24d, and the tip 24a is connected to the first channel 22 via a second slider (not shown) so as to be slidable in the left-right direction, and the base end 24b is connected to the second channel 27 via a third slider (not shown) so as to be slidable in the left-right direction. The sub-arm 24 has a rotary connection part 24c connected to the longitudinal middle position of the lift arm 23 at a longitudinal middle position, and is disposed so as to intersect with the lift arm 23. When the lift arm 23 rotates around the support shaft 26a, the whole sub-arm 24 rotates around the rotary connection part 24c, and the base end 24b of the sub-arm 24 slides in the left-right direction. As a result, the tip 24a of the sub-arm 24 moves in the lifting direction while sliding in the left-right direction, and the tip 24a pushes up or pulls down the first channel 22 in the lifting direction.

[0015] In this manner, by pushing up or pulling down the first channel 22 in the lifting and lowering direction by the lift arm 23 and the sub-arm 24, the window glass G attached to the first channel 22 via the glass holders 21, 21 is raised and lowered.

[0016] The sector gear 25 is formed in an arc shape and is fixed to the base end 23b of the lift arm 23 by welding or the like. A gear portion 25a that meshes with an output gear 32 (described later) of the drive unit 12 is formed on the arc-shaped outer circumferential surface of the sector gear 25. The gear portion 25a of the sector gear 25 is a so-called involute gear.

[0017] The drive unit 12 includes a motor 31 with a reducer that serves as a drive source for the window regulator 11, an output gear 32 that is axially attached to the motor 31 with a reducer and meshes with the sector gear 25, and a gear cover 33 that covers the output gear 32. The gear cover 33 is attached to the inner panel P and is formed integrally with the support base 26 of the window regulator 11. As shown in Figures 3(a) and 4(a), the gear cover 33 holds a head 72 of a gear forming portion 62 (described later) of the output gear 32 so as to be slidable and rotatable.

[0018] The motor with a reducer 31 comprises an electric motor 41 which is the motor body, an output shaft 42 which outputs the rotational force of the electric motor 41, a reducer (not shown) which transmits the rotation of the electric motor 41 to the output shaft 42 and reduces the rotation of the electric motor 41, and a motor case 43 which houses the reducer.

[0019] When the electric motor 41 is driven in the forward direction, the output gear 32 attached to the output shaft 42 rotates in the forward direction, and the lift arm 23 rotates counterclockwise via the sector gear 25 meshed with the output gear 32. As a result, the tip 23a of the lift arm 23 moves upward while sliding left and right. Meanwhile, in response to the rotation of the lift arm 23, the sub-arm 24 rotates clockwise and the base end 24b of the sub-arm 24 slides left and right. As a result, the tip 24a of the sub-arm 24 moves upward while sliding left and right. As a result, the first channel 22 connected to the lift arm 23 and the tips 23a, 24a of the sub-arm 24 is pushed upward in the lifting / lowering direction, and the window glass G rises via the glass holders 21, 21.

[0020] On the other hand, when the electric motor 41 is driven in the reverse direction, the output gear 32 attached to the output shaft 42 rotates in the reverse direction, and the lift arm 23 rotates clockwise via the sector gear 25 meshed with the output gear 32. As a result, the tip 23a of the lift arm 23 moves downward while sliding left and right. Meanwhile, in response to the rotation of the lift arm 23, the sub-arm 24 rotates counterclockwise while the base end 24b of the sub-arm 24 slides left and right. As a result, the tip 24a of the sub-arm 24 moves downward while sliding left and right. As a result, the first channel 22 connected to the lift arm 23 and the tips 23a, 24a of the sub-arm 24 is pulled downward in the lifting / lowering direction, and the window glass G descends via the glass holders 21, 21.

[0021] Next, the output shaft 42 and the output gear 32 of the reduction geared motor 31 will be described with reference to Figures 4 to 6. As shown in Figures 4(b) and 5, the output shaft 42 is made of a resin material and has a serration forming portion 51 on which serrations 51a are formed, and a shaft-shaped portion 52 connected to the serration forming portion 51 on the axially distal side.

[0022] The serration forming portion 51 has serrations 51a formed on its outer circumferential surface. The serrations 51a have a wavy shape in which convex portions and concave portions are alternately arranged in the circumferential direction. The serrations 51a are also formed in a tapered shape that reduces in diameter from the base side to the tip side in the axial direction.

[0023] The shaft-shaped portion 52 is formed coaxially with the serration-forming portion 51 so as to protrude from the axial tip end surface 51b of the serration-forming portion 51, and has a cylindrical shaft shape. A press-fitted portion 52a is formed on the tip end surface of the shaft-shaped portion 52. The press-fitted portion 52a is formed in a cylindrical hole shape (concave shape), and a press-fitted protrusion 72a (described later) of the output gear 32 is press-fitted into the press-fitted portion 52a.

[0024] 4(c) and 6, the output gear 32 is made of a metal material and has a serration press-fit portion 61 (first press-fit portion) that is press-fitted into the serration 51a of the serration forming portion 51, and a gear forming portion 62 that is connected to the axial end side of the serration press-fit portion 61 and has a gear portion 71a that meshes with the sector gear 25. The output gear 32 is a pinion conversion adapter that connects a reducer-equipped motor 31 that has a serration-type output shaft 42 (a so-called serration shaft) to the sector gear 25 of the window regulator 11.

[0025] The serration press-fitting portion 61 is formed in a cylindrical shape, and a serration engagement portion 61a that engages with the serration 51a of the serration forming portion 51 is formed on its inner circumferential surface. The serration engagement portion 61a has a wavy shape in which convex portions and concave portions are alternately arranged in the circumferential direction, and has a shape complementary to the serration 51a. The serration engagement portion 61a is formed in a shape that reduces in diameter from the base side to the tip side in the axial direction so as to imitate the serration 51a. When the serration press-fitting portion 61 is press-fitted into the serration 51a, the serration engagement portion 61a is press-fitted to the outside of the serration 51a. That is, the outer diameter of the serration engagement portion 61a is formed slightly smaller than the outer diameter of the serration 51a, and the serration engagement portion 61a is press-fitted into the serration 51a in a manner that the serration 51a is deformed so as to be compressed in the radial direction.

[0026] The gear forming portion 62 is formed coaxially with the serration press-fitting portion 61, and has a cylindrical main body portion 71 having an internal space, and a head portion 72 that is connected to the axial tip side of the main body portion 71 and closes the axial tip side of the internal space of the main body portion 71. The main body portion 71 has a gear portion 71a formed on its outer circumferential surface with which the gear portion 25a of the sector gear 25 meshes. The gear portion 71a of the main body portion 71 is an involute gear that matches the gear portion 25a of the sector gear 25. The main body portion 71 is configured so that the shaft-shaped portion 52 of the output shaft 42 fits into its internal space. That is, the inner circumferential surface of the main body portion 71 fits into the outer circumferential surface of the shaft-shaped portion 52.

[0027] The head 72 has a cylindrical shape formed coaxially with the main body 71. A press-fit protrusion 72a (second press-fit portion) is formed on an opposing surface (lower surface) of the head 72 that faces the axial tip surface of the shaft-shaped portion 52. The press-fit protrusion 72a is formed in a cylindrical shape and protrudes from the opposing surface toward the axial tip surface of the shaft-shaped portion 52. That is, the press-fit protrusion 72a has a shape complementary to the press-fit portion 52a of the shaft-shaped portion 52. This press-fit protrusion 72a is press-fitted into the press-fit portion 52a from the axial tip side. That is, the outer diameter of the press-fit protrusion 72a is formed slightly larger than the outer diameter of the press-fit portion 52a, and the press-fit protrusion 72a is press-fitted into the press-fit portion 52a in a manner that the press-fit portion 52a is deformed so as to be pushed outward. As a result, the outer circumferential surface of the press-fit protrusion 72a is press-fitted into the inner circumferential surface of the press-fitted portion 52a, and the outer circumferential surface of the press-fit protrusion 72a and the inner circumferential surface of the press-fitted portion 52a are engaged in the radial direction.

[0028] 4(a), when the output gear 32 is axially attached to the output shaft 42, the serration press-fit portion 61 is press-fitted into the serration 51a of the serration forming portion 51, and the press-fit protrusion 72a is press-fitted into the press-fit portion 52a, from the axial end side. As a result, the output gear 32 is press-fitted and joined to the output shaft 42 at two points in the axial direction, and the output shaft 42 and the output gear 32 are integrated.

[0029] (Actions and Effects of the Embodiments) As described above, according to the embodiment, the output gear 32 is press-fitted to the output shaft 42 at two axial locations, so that the output shaft 42 and the output gear 32 can be firmly integrated. This improves the rigidity of the output gear 32 (particularly the rigidity of the tip side of the output gear 32) and suppresses core runout of the output gear 32. This suppresses wear of the gear portions 25a, 71a and the generation of abnormal noise due to core runout.

[0030] In addition, since the output gear 32 is provided with a press-fit protrusion 72a that is press-fitted from the axial end side into the shaft-shaped portion 52 in addition to the serration press-fit portion 61, it is possible to prevent the output gear 32 from floating up from the output shaft 42, and therefore it is possible to prevent the output gear 32 from coming off the output shaft 42.

[0031] (Other embodiments) In the above embodiment, the press-fitted portion 52a and the press-fit convex portion 72a have a circular shape when viewed in the axial direction, but as shown in Fig. 7(a), the press-fitted portion 52a and the press-fit convex portion 72a may have an annular (donut-shaped) shape when viewed in the axial direction. Also, as shown in Fig. 7(b), the shaft-shaped portion 52 may have a plurality of press-fitted portions 52a, and the gear forming portion 62 may have a plurality of press-fit convex portions 72a. Furthermore, the press-fitted portion 52a may be hole-shaped, i.e., a through-hole-shaped.

[0032] 7(c), the gear forming portion 62 may have a hole-shaped press-fit hole 62a (second press-fit portion) that is press-fitted from the axial tip side into the outer circumferential surface of the shaft-shaped portion 52, instead of the press-fit protrusion 72a. In this case, it is preferable to form the outer circumferential surface of the shaft-shaped portion 52 in a tapered shape that reduces in diameter from the axial base side to the tip side, and to form the press-fit hole 62a in a tapered shape that follows the outer circumferential surface of the shaft-shaped portion 52, as shown in FIG.

[0033] 8(a), the gear forming portion 62 of the output gear 32 may have a contact surface 61b that comes into surface contact with the axial tip surface 51b of the serration forming portion 51. With this configuration, the output gear 32 can be prevented from tilting and rising up relative to the output shaft 42, and the output gear 32 can be further prevented from coming off the output shaft 42.

[0034] In the above embodiment and each of the above modified examples, as shown in Fig. 8(b) and (c), the output gear 32 may further have a through pin 101 that passes through the shaft-shaped portion 52 and the gear forming portion 62 in the axially lateral direction. Specifically, as shown in Fig. 8(b), the through pin 101 may pass through the shaft-shaped portion 52 and the main body portion 71 of the gear forming portion 62, or as shown in Fig. 8(c), the shaft-shaped portion 52 may be extended to the inside of the head portion 72 of the gear forming portion 62, and the through pin 101 may pass through the shaft-shaped portion 52 and the head portion 72. According to these configurations, it is possible to further suppress the output gear 32 from floating up from the output shaft 42, and to further suppress the output gear 32 from coming off from the output shaft 42.

[0035] In the above embodiment and each of the above modified examples, as shown in FIG. 9(a), a part of the shaft-shaped portion 52 may be extended to penetrate the gear-forming portion 62 and protrude from the axial tip surface of the gear-forming portion 62 (head 72 of the gear-forming portion 62), and the output gear 32 may further include a circlip 102 fitted into the protruding portion. That is, the circlip 102 is fitted into the part of the shaft-shaped portion 52 protruding from the axial tip surface of the gear-forming portion 62 and contacts the axial tip surface of the gear-forming portion 62. With this configuration, it is possible to further suppress the output gear 32 from floating up from the output shaft 42, and to further suppress the output gear 32 from coming off from the output shaft 42. In this case, it is preferable to form a groove for attaching the circlip 102 in the part of the shaft-shaped portion 52 protruding from the axial tip surface of the gear-forming portion 62.

[0036] In the above embodiment and each of the above modified examples, as shown in FIG. 9(b), the output gear 32 may further include a set screw 103 (set screw) that is fastened to the gear forming portion 62 (main body portion 71) from the axial side and contacts the shaft-shaped portion 52. With this configuration, the output gear 32 can be further prevented from floating up from the output shaft 42, and the output gear 32 can be further prevented from coming off from the output shaft 42. In this case, as shown in FIG. 9(b), it is preferable that a key groove 52b is formed in the outer circumferential surface of the shaft-shaped portion 52 at a portion where the set screw 103 of the shaft-shaped portion 52 contacts. With this configuration, the set screw 103 can be used as a key (machine key) corresponding to the key groove 52b.

[0037] In the above embodiment and each of the modified examples, the output gear 32 has a second press-fit portion (press-fit protrusion 72a or press-fit hole 62a) press-fitted into the shaft-shaped portion 52. However, as shown in FIG. 9(c), instead of the second press-fit portion, a fastening bolt 104 that fastens the gear forming portion 62 to the shaft-shaped portion 52 from the axial end side may be provided. Specifically, as shown in FIG. 9(c), the fastening bolt 104 is fastened to the tip portion of the shaft-shaped portion 52 through a through hole in the head 72 of the gear forming portion 62, thereby fastening the head 72 of the gear forming portion 62 to the tip portion of the shaft-shaped portion 52. With this configuration, it is possible to suppress the core runout of the output gear 32, and it is possible to suppress the output gear 32 from floating up from the output shaft 42, and it is possible to suppress the output gear 32 from coming off the output shaft 42. In this case, it is preferable that the outer peripheral surface of the fastening bolt 104 be fitted into the inner peripheral surface of the through hole of the gear forming portion 62 .

[0038] Although the embodiments of the present invention have been described above, the above-mentioned embodiments do not limit the invention according to the claims. It should be noted that not all of the combinations of features described in the embodiments are essential to the means for solving the problems of the invention. The present invention can be modified appropriately without departing from the spirit of the invention. [Explanation of symbols]

[0039] 1: window regulator system, 11: window regulator, 25: sector gear, 31: motor with reducer, 32: output gear, 42: output shaft, 51: serration forming portion, 51a: serration, 51b: axial tip surface, 52: shaft-shaped portion, 52a: press-fit portion, 61: serration press-fit portion, 61b: contact surface, 62: gear forming portion, 71a: gear portion, 72a: press-fit protrusion, 101: through pin, 102: circlip, 103: set screw

Claims

1. An output gear is attached to an output shaft of a motor with a reducer, the output shaft having a serration-forming portion and a shaft-shaped portion connected to the serration-forming portion, and the output gear is engaged with an input gear of a window regulator, a first press-fitting portion that is press-fitted into the serration of the serration forming portion; a gear forming portion connected to the first press-fit portion, the gear portion being formed on an outer circumferential surface thereof and meshing with the input gear, and the shaft portion being inserted therein; An output gear, characterized in that the gear forming portion has a second press-fit portion that is press-fitted into the shaft-shaped portion from an axial end side.

2. A recessed or hole-shaped press-fit portion is formed on the axial tip surface of the shaft-shaped portion, The output gear according to claim 1 , wherein the second press-fit portion has a convex shape and is press-fitted into the press-fitted portion.

3. The output gear according to claim 1 , wherein the second press-fit portion is hole-shaped and press-fitted into an outer circumferential surface of the shaft portion.

4. 4. The output gear according to claim 1, wherein the gear forming portion has a contact surface that comes into surface contact with an axial tip end surface of the serration forming portion.

5. 5. The output gear according to claim 1, further comprising a through pin that passes through the gear forming portion and the shaft portion in a lateral direction in the axial direction.

6. 5. The output gear according to claim 1, further comprising a set screw that is fastened to said gear forming portion from a side in the axial direction and comes into contact with said shaft-like portion.

7. An output gear according to any one of claims 1 to 6; The motor with a reduction gear; A window regulator system comprising the window regulator.

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