Power swivel device

Abstract

The present invention relates to a power swivel device comprising: a housing that overall has a ring shape with an accommodation space formed therein; an output unit that has one side coupled to a seat or a seat frame and rotates about a first rotation axis; and an input unit that reduces the rotational force of a drive motor by means of a speed reduction unit and applies same to the output unit. The accommodation space includes a left accommodation space, a right accommodation space, an upper accommodation space, and a lower accommodation space with respect to the diameter direction of the first rotation axis, and the drive motor and the speed reduction unit may be installed in the accommodation space.

Description

Power swivel device

[0001] The present invention relates to a power swivel device, and more particularly, to a power swivel device for a vehicle seat that can secure weight reduction and strength with a compact configuration.

[0002] The present invention relates to project number P0021941, detailed project unique number 0021941, which was carried out with the support of the Korea Institute for Advancement of Technology with funds from the Ministry of Trade, Industry and Energy.

[0003] A power swivel device, which is generally applied to a vehicle seat and can swivel the seat, may be applied with a drive device of a gear combination that rotates a driven gear formed on the inner or outer diameter surface of a turntable using a drive gear such as a pinion gear.

[0004] These conventional power swivel devices have problems such as the drive gear, motor, or reduction gear box easily breaking down or being damaged because the load or impact applied to the seat is directly transmitted to the drive gear through the rotating plate due to the vehicle's usage environment or the characteristics of the seat.

[0005] In addition, power swivel devices using gear elements such as planetary gears and cycloid have been developed recently to implement high gear ratios, but there have been problems with their high production cost and weight making them difficult to apply to actual mass-produced vehicles.

[0006] The present invention aims to solve various problems, including the above-mentioned problems, by providing a power swivel device that achieves a high reduction ratio through a simplified gear structure, can be manufactured at a low cost, can firmly support axial loads and reverse rotation loads generated by the characteristics of the seat, and has a compact and lightweight structure. However, these tasks are exemplary and the scope of the present invention is not limited thereby.

[0007] According to one embodiment of the present invention, a power swivel device is provided. The power swivel device comprises: a housing formed in a ring shape with an accommodation space formed therein; an output unit having a sheet or sheet frame coupled to one side thereof and rotating around a first rotational axis; an input unit for reducing the rotational force of a driving motor by a reduction unit and applying the reduced force to the output unit; and a control unit for applying a control signal to the input unit; wherein the accommodation space includes a left accommodation space, a right accommodation space, an upper accommodation space, and a lower accommodation space centered on a radial direction of the first rotational axis, and the control unit may be installed in the left accommodation space, the driving motor may be installed in the right accommodation space, and the reduction unit may be installed in the upper accommodation space or the lower accommodation space.

[0008] According to one embodiment of the present invention, the output unit may include a body unit formed in an overall cylindrical shape; a first worm wheel formed on one side of the body unit; and an output disk formed on one end of the body unit and formed in an overall ring shape.

[0009] According to one embodiment of the present invention, the reduction unit may include: a first shaft that rotates about a second rotation axis that is perpendicular to the first rotation axis; and a first worm gear formed on the first shaft and meshed with the first worm wheel.

[0010] According to one embodiment of the present invention, the reduction unit may include a second worm wheel formed at one end of the first shaft; and the driving motor may include a second shaft that rotates about a third rotation axis that is perpendicular to both the first rotation axis and the second rotation axis; and a second worm gear that is installed on the second shaft and meshes with the second worm wheel.

[0011] According to one embodiment of the present invention, the reduction unit can be installed in both the upper receiving space and the lower receiving space so that a pair can be installed with the first worm wheel interposed therebetween.

[0012] According to one embodiment of the present invention, the output unit may include at least one bearing that is coupled to the housing and supports the body unit so as to rotate about the first rotational axis.

[0013] According to one embodiment of the present invention, the output unit may include a first bearing coupled to the housing so as to support a load in the direction of the first rotation axis; and a second bearing installed at a position adjacent to the first bearing.

[0014] According to one embodiment of the present invention, the output unit may include at least one bush that is coupled to the housing and supports the body unit so that it can rotate about the first rotation axis.

[0015] According to one embodiment of the present invention, the housing includes a receiving space having a cross-section formed in an overall 'ㄷ' shape so that at least a portion of the output unit can be received, and the output unit may include a first bush coupled to one side of the receiving space to support the body unit in a radial direction of the first rotational axis; a second bush coupled to a lower side of the receiving space to support the body unit upwardly with respect to the first rotational axis; and a third bush coupled to an upper side of the receiving space to support the body unit downwardly with respect to the first rotational axis.

[0016] According to one embodiment of the present invention, the housing may be formed integrally with a mounting portion having one side open and accommodating the driving motor therein so that the driving motor can be installed.

[0017] According to one embodiment of the present invention, a simplified gear structure is appropriately arranged in the housing's receiving space to achieve a high reduction ratio with a compact structure, while at the same time, it can be manufactured at a low cost, and even with a lightweight structure, it has the effect of being able to firmly support axial loads and reverse rotation loads generated due to the characteristics of the seat. Of course, the scope of the present invention is not limited by these effects.

[0018] Figure 1 is an exploded perspective view of a power swivel device according to one embodiment of the present invention.

[0019] FIG. 2 is a cross-sectional view showing one section of a power swivel device according to one embodiment of the present invention.

[0020] FIG. 3 is a cross-sectional view showing one section of a power swivel device according to another embodiment of the present invention.

[0021] Fig. 4 is a perspective view showing an input unit according to one embodiment of the present invention.

[0022] FIG. 5 is a plan view showing the internal structure of a power swivel device according to one embodiment of the present invention as viewed from above.

[0023] Figure 6 is a perspective view showing a housing according to another embodiment of the present invention.

[0024] Hereinafter, various preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0025] The embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. The following embodiments may be modified in various ways, and the scope of the present invention is not limited to the following embodiments. Rather, these embodiments are provided to more faithfully and completely explain the present disclosure and to fully convey the spirit of the present invention to those skilled in the art. In addition, the thickness and size of each layer in the drawings are exaggerated for convenience and clarity of explanation.

[0026] Hereinafter, embodiments of the present invention will be described with reference to drawings schematically illustrating ideal embodiments of the present invention. In the drawings, variations in the shapes depicted may be expected, for example, depending on manufacturing techniques and / or tolerances. Therefore, embodiments of the present invention should not be construed as limited to the specific shapes of the regions depicted herein, but should include, for example, variations in shapes resulting from manufacturing processes.

[0027] The first rotation axis, second rotation axis, and third rotation axis used in this specification may be directions corresponding to the z-axis, x-axis, and y-axis directions illustrated in the drawing, respectively, and are not necessarily limited thereto, but are used to explain the relative positional relationship or movement direction of each member.

[0028] FIG. 1 is an exploded perspective view of a power swivel device (1000) for a vehicle seat according to one embodiment of the present invention.

[0029] As illustrated in FIG. 1, a power swivel device (1000) for a vehicle seat according to one embodiment of the present invention may include a housing (200) formed in a ring shape with an accommodation space formed inside, an output unit (400) to which a seat or a seat frame is coupled on one side and which rotates based on a first rotation axis direction, and an input unit (300) that reduces the rotational force of a driving motor by a reduction unit and applies it to the output unit. A cover unit (100) may be coupled to an upper portion of the housing (200) to accommodate the input unit (300) and the output unit (400) inside.

[0030] The above cover part (100), housing (200), input part (300), and output part (400) can be laminated and combined based on the z-axis direction to form a power swivel device (1000) for a vehicle seat.

[0031] Fig. 2 is a cross-sectional view showing one section of a power swivel device (1000) for a vehicle seat of the present invention. Here, in order to explain other components, the input unit (300) is omitted and only a rough assembly position is shown.

[0032] As shown in Fig. 2, the housing (200) may be formed in a shape in which the center is entirely empty, and a post in the shape of a hollow pipe to which the output unit (400) is fixed may be formed to protrude from the center.

[0033] In addition, the output section (400) may include a body section (410) formed in an overall cylindrical shape, a first worm wheel (411) formed on one side of the body section (410), and an output disk (412) formed on one end of the body section (410) and formed in an overall ring shape.

[0034] In addition, the body part (410) is formed as a hollow pipe shape with a diameter wider than that of the post of the housing (200) as a whole, and is fixed and rotated on the first rotation axis by at least one bearing (420) and a bush (430). At this time, the body part (410) can be supported by a double-row bearing structure coupled by a first bearing (421) and a second bearing (422). Although not shown in the drawing, the above-described bearings can be fixed to the housing (200) by a plurality of snap rings and a stepped shape of the housing.

[0035] In addition, the cover part (100) may be coupled to one side of the housing (200) so that the power swivel device (1000) of the vehicle seat forms an overall ring shape. At this time, the cover part (100) may further include a ring-shaped seal part (110) installed on an adjacent surface with the output disk (412) to prevent external foreign substances from entering the interior of the housing (200). For example, the seal part (110) may be a dust seal or an oil seal.

[0036] FIG. 3 is a cross-sectional view showing a cross-section of a power swivel device for a vehicle seat according to another embodiment of the present invention.

[0037] As illustrated in FIG. 3, the body part (410`) of the power swivel device for a vehicle seat according to another embodiment of the present invention is formed with a structure partially identical to that of the body part (410) of the power swivel device for a vehicle seat according to one embodiment, but can be coupled to the housing (200`) by a plurality of bushes.

[0038] More specifically, the housing (200`) includes a receiving space whose cross-section is formed in an overall ‘ㄷ’ shape so that at least a portion of the body portion (410`) can be received, and the output portion (400`) can be coupled to the receiving space of the housing (200`) by a plurality of bushes.

[0039] For example, the output section (400`) may include a first bush (431) coupled to one side of the receiving space to support the body section (410`) in the radial direction of the first rotation axis, a second bush (432) coupled to the lower side of the receiving space to support the body section (410`) upwardly with respect to the first rotation axis, and a third bush (433) coupled to the upper side of the receiving space to support the body section (410`) downwardly with respect to the first rotation axis.

[0040] Therefore, according to the power swivel device for a vehicle seat according to another embodiment of the present invention, the bearing-bush support structure of the output gear can be changed to a bush combination support structure, thereby enabling miniaturization and cost reduction.

[0041] Figure 4 is a perspective view showing an input unit (300) according to one embodiment of the present invention.

[0042] As illustrated in Fig. 4, the input unit (300) may include a driving motor (310) and a reduction unit (320). The driving motor (310) and the reduction unit (320) may be coupled to one surface of the housing (200).

[0043] More specifically, the reduction unit (320) may include a first shaft (321) that rotates around a second rotation axis that is perpendicular to the first rotation axis, a first worm gear (322) formed at the center of the first shaft (321) and meshed with a first worm wheel (411), a second worm wheel (323) coupled to an end of the first shaft (321), and a support unit (324) that supports the first shaft (321).

[0044] Additionally, the drive motor (310) may include a motor case (311), a second axis (312) that rotates about a third rotation axis that is perpendicular to both the first rotation axis and the second rotation axis, and a second worm gear (313) that is installed at one end of the second axis (312) and engages with a second worm wheel (323).

[0045] At this time, as illustrated in FIG. 4, the reduction unit (320) may be arranged in pairs with the first worm wheel (411) of the output unit (400`) interposed therebetween, and the second worm gear (313) of the drive motor (310) may be installed at one end and the other end of the second shaft (312), respectively, and arranged to mesh with the second worm wheels (323), respectively. At this time, the drive motor (310) may be a dual-axis motor in which the rotational axes protrude in both directions based on the motor body.

[0046] Accordingly, the output unit (400) of the power swivel device (1000) for a vehicle seat according to one embodiment of the present invention is firmly supported by a pair of reduction units (320), so that it can strongly support the swivel core from the reverse rotation applied due to the movement of a seated passenger due to the characteristics of the seat, i.e., from the external force applied from the output unit (400) to the input unit (300).

[0047] In addition, the second worm gears (313) on both sides of the second shaft (312) have opposite twist directions applied to them, thereby canceling out the axial load. This can protect the driving motor (310) and the bearings inside the motor case (311) when a load or external impact occurs while driving the second worm wheel (323).

[0048] FIG. 5 is a plan view showing the internal structure of a power swivel device (1000) for a vehicle seat according to one embodiment of the present invention, viewed from above.

[0049] As illustrated in FIG. 5, the accommodation space of the housing (200) includes a left accommodation space (A1), a right accommodation space (A2), an upper accommodation space (A3), and a lower accommodation space (A4) based on the radial direction of the first rotation axis, and the control unit (500) may be installed in the left accommodation space (A1), the drive motor (310) may be installed in the right accommodation space (A2), and the reduction unit (320) may be installed in the upper accommodation space (A3) and the lower accommodation space (A4), respectively.

[0050] Therefore, in the power swivel device (1000) of a vehicle seat according to one embodiment of the present invention, the drive motor (310), the reduction unit (320), and the control unit (500) can be compactly arranged in a narrow receiving space of the housing (200).

[0051] Fig. 6 is a perspective view showing a housing (200``) according to another embodiment of the present invention. As shown in Fig. 6, the housing (200``) may be formed integrally with a mounting portion (210``) that is opened on one side so that a driving motor (310) can be coupled thereto and accommodates the driving motor (310) therein.

[0052] In addition, so that the driving motor (310) can be inserted into the mounting portion (210``), the wall surface of the housing (200``) corresponding to the removal path of the driving motor (310) can be formed in an open shape, and although not shown in the drawing, the cover (100`) can be formed with a protrusion corresponding to the shape of the open wall surface of the housing (200``) to seal the receiving space of the housing (200``).

[0053] Accordingly, in the past, in order to assemble the drive motor (310), it was necessary to combine it with the motor case (311) and then assemble the motor case (311), but now, the drive motor (310) can be easily assembled into the mounting part (210``) integrally formed with the housing (200``), enabling miniaturization and cost reduction.

[0054] While the present invention has been described with reference to the embodiments illustrated in the drawings, these are merely exemplary, and those skilled in the art will appreciate that various modifications and equivalent alternative embodiments are possible. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims.

Claims

1. A housing formed in a ring shape with an internal storage space formed overall; An output unit having a sheet or sheet frame coupled to one side and rotating around a first rotation axis; An input section that reduces the rotational power of the driving motor by a reduction section and applies it to the output section; and The above-mentioned accommodation space includes a left accommodation space, a right accommodation space, an upper accommodation space, and a lower accommodation space centered on the diametric direction of the first rotation axis, A power swivel device, wherein the above driving motor and the above reduction gear are installed in the above receiving space.

2. In paragraph 1, The above output section, The body part is formed into an overall cylindrical shape; A first worm wheel formed on one side of the body portion; and An output disk formed on one end of the above body portion and formed in a ring shape overall; A power swivel device, including:

3. In paragraph 2, The above reduction gear is, A first axis that rotates about a second rotation axis that is perpendicular to the first rotation axis; and A first worm gear formed on the first axis and meshed with the first worm wheel; A power swivel device, including:

4. In paragraph 3, The above reduction gear is, A second worm wheel formed on one end of the first axis; The above driving motor, a second axis that rotates about a third rotation axis that is perpendicular to both the first rotation axis and the second rotation axis; and A second worm gear installed on the second shaft and meshing with the second worm wheel; A power swivel device, including:

5. In paragraph 4, The above reduction gear is, A power swivel device installed in both the upper receiving space and the lower receiving space so that a pair can be installed with the first worm wheel in between.

6. In paragraph 2, The above output section, At least one bearing coupled to the housing and supporting the body portion so as to rotate about the first rotational axis; A power swivel device, including:

7. In paragraph 6, The above output section, A first bearing coupled to the housing so as to support a load in the direction of the first rotation axis; and A second bearing installed adjacent to the first bearing; A power swivel device, including:

8. In paragraph 2, The above output section, At least one bush that is coupled to the housing and supports the body portion so that it can rotate about the first rotation axis; A power swivel device, including:

9. In paragraph 8, The above housing, It includes a receiving space whose cross-section is formed in the shape of the letter 'ㄷ' so that at least a portion of the output section can be received, The above output section, A first bush coupled to one side of the above-mentioned receiving space and supporting the body portion in the radial direction of the first rotation axis; A second bushing coupled to the lower surface of the above-mentioned receiving space and supporting the body portion upward with respect to the first rotation axis; and A third bushing that is coupled to the upper side of the above-mentioned receiving space and supports the body portion downward with respect to the first rotation axis; A power swivel device, including:

10. In paragraph 2, The above housing, A power swivel device having a mounting portion integrally formed with one side open so that the driving motor can be installed therein.

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