KR20240006233A - Power swivel system of seat for vehicle and its planetary transmission - Google Patents

Abstract

The present invention is a vehicle seat that can secure foot space for passengers in a compact size, reduce the number of parts, and reduce the weight of the product by embedding a planetary gear-type reduction device inside a cylindrical monopost-type structure. Pertaining to a power swivel system and a planetary gear type reduction device thereof, comprising: an input unit fixed to a vehicle; an output unit fixed to the seat frame and disposed on the rotation axis of the seat frame so that it can be swiveled with the seat frame by the input unit; and a planetary gear type reduction device installed between the input unit and the output unit, and reducing the rotational power of the input unit and transferring it to the output unit.

Description

Power swivel system of seat for vehicle and its planetary gear type reduction device {Power swivel system of seat for vehicle and its planetary transmission}

The present invention relates to a power swivel system for a vehicle seat and a planetary gear-type reduction device thereof. More specifically, the planetary gear-type reduction device is built into a cylindrical monopost-type structure to secure foot space for passengers in a compact size. It relates to a power swivel system for a vehicle seat and a planetary gear type reduction device thereof that can reduce the number of parts and reduce the weight of the product.

In general, vehicles are equipped with seats for passengers, and the direction of the seat can be swiveled and rotated manually or automatically depending on the passenger's situation or needs.

The power swivel rotation device for a conventional vehicle seat is a power transmission device in which a drive motor installed on the vehicle body and a rotating disk installed on the seat frame are installed separately at separate locations, and a spur gear combination meshed between them is used. It was configured to transmit the rotational power of the drive motor to the rotating disk.

However, in this conventional power swivel rotation device for a vehicle seat, the motor, power transmission device, and rotating disk are installed separately, and the device becomes large to withstand the load of the vehicle seat and the passenger seated on the vehicle seat, so the volume is too large. As it becomes larger, the passenger's foot space becomes narrower, which increases the number of parts and increases the weight of the product, which increases the unit price of the product. It is also vulnerable to collision loads and impacts because it is not structurally compact, and is not structurally robust, so it is not required to undergo crash tests. It was difficult to satisfy, and the spur gear reduction method had many problems, such as the chronic backlash phenomenon in which the direction of the sheet was not fixed and it rotated.

The present invention is intended to solve various problems including the problems described above. By embedding a planetary gear-type reduction device in the monopost-type internal space, the passenger's foot space can be comfortably secured with a compact size, and the number of parts is reduced. By reducing the weight of the product, the unit price of the product can be lowered, and the brackets are structurally combined together to form a compact structure, making it resistant to collision load or impact, thereby satisfying the crash test, and planetary gears. By using the meshing method of internal and external teeth, backlash phenomenon can be prevented, and self-infinite locking of the deceleration device is possible, sheet clearance and joint performance can be greatly improved, and wire twisting and external exposure of wires can be prevented. The purpose is to provide a power swivel system for a vehicle seat and a planetary gear type reduction device thereof that can prevent However, these tasks are illustrative and do not limit the scope of the present invention.

A power swivel system for a vehicle seat according to the spirit of the present invention for solving the above problems includes an input unit fixed to the vehicle; an output unit fixed to the seat frame and disposed on the rotation axis of the seat frame so that it can be swiveled with the seat frame by the input unit; and a planetary gear type reduction device installed between the input unit and the output unit, and reducing the rotational power of the input unit and transferring it to the output unit.

Additionally, according to the present invention, the planetary gear type reduction device includes: a carrier rotated by the input unit; at least one first planetary gear rotatably installed on one side of the carrier, having a first end at a first height and a second end at a second height; at least one second planetary gear rotatably installed on the other side of the carrier and having a second end formed at the second height and a third end formed at a third height; a first-stage ring gear fixedly installed at the first height such that one internal tooth is inscribed with the first end of the first planetary gear; a two-stage ring gear rotatably installed at the second height such that one internal tooth is inscribed with the second end of the first planetary gear and the second end of the second planetary gear; and a three-stage ring gear rotatably installed at the third height such that one internal tooth is inscribed in the third end of the second planetary gear and connected to the output unit.

In addition, according to the present invention, the carrier is formed in an overall ring shape so that a hollow portion is formed inside, and a plurality of bridge portions protruding upward are formed, and the first planetary gear can be rotated between the bridge portions. A carrier lower having at least one first support shaft supporting the first planetary gear and at least one second support shaft rotatably supporting the first planetary gear; and a carrier upper having a hollow portion formed therein and generally formed in a ring shape to connect the bridge portions with the first support shaft and the second support shaft.

In addition, according to the present invention, the carrier is formed with four bridge parts equiangularly arranged at 90 degrees around the hollow part, and two first support axes and two second support axes are provided between the bridge parts. They can be placed alternately.

In addition, according to the present invention, the carrier is disposed at an angle to the carrier upper so as to secure each of the four bridge parts and each of the two first support axes and the two second support axes. It may further include a fixture penetrating the upper.

In addition, according to the present invention, the first planetary gear has a first end formed with a first diameter so that the rotational speed of the input unit can be firstly reduced and transmitted to the second ring gear, and the second end has a first diameter. It is formed with a second diameter different from the first diameter, and the second end of the second planetary gear is formed with a third diameter so that the rotational speed of the second stage ring gear can be secondarily reduced and transmitted to the third stage ring gear. , the three ends may be formed with a fourth diameter that is different from the third diameter.

Additionally, according to the present invention, the first-stage ring gear is fixed to the input unit with a fixture, and the second-stage ring gear meshes with the second end of the first planetary gear and the second end of the second planetary gear. a second-stage ring gear inner rotating at a first rotational speed; and a second-stage ring gear outer fixed to the input unit with the fixture and rotatably supporting the second-stage ring gear inner using bearing balls and retainers, wherein the third-stage ring gear includes the second ring gear. a three-stage ring gear inner meshed with the third end of the planetary gear and rotated at a second rotational speed slower than the first rotational speed, and fixed to the output unit with a fixture; and a three-stage ring gear outer that is fixed to the input unit with the fixture and rotatably supports the three-stage ring gear inner using a bearing ball and retainer.

Additionally, according to the present invention, the planetary gear type reduction device includes: a carrier rotated by the input unit; At least one integrated planetary gear rotatably installed on one side of the carrier; A first-stage ring gear in which one internal tooth is fixedly installed to be internally in contact with the lower part of the integrated planetary gear and has N teeth (N is a natural number); And a two-stage ring gear in which one internal tooth is installed to be in contact with the upper part of the integrated planetary gear, is rotatably installed, is connected to the output unit, and has a number of M teeth (M is a natural number) different from the N teeth. May include ;.

In addition, according to the present invention, the carrier is formed as a whole in a cylindrical ring shape so that a hollow portion is formed inside, and a plurality of bridge portions protruding upward are formed, and the integrated planetary gear is rotatable between the bridge portions. A carrier lower formed with at least one integrated support shaft supporting it; and a carrier upper having a hollow portion formed therein and generally formed in a ring shape to connect the bridge portions and the integrated support shafts.

In addition, according to the present invention, in the carrier, the two integrated support shafts are arranged at an equal angle of 180 degrees around the hollow portion, and bridge portions may be formed on the left and rear sides of the two integrated support shafts, respectively.

In addition, according to the present invention, the carrier may further include a fixture penetrating the carrier upper so as to fix the bridge portions and the two integrated support axes, respectively.

Additionally, according to the present invention, the integrated planetary gear may have the lower diameter and the upper diameter formed to be the same so that the rotational speed of the input unit can be reduced and transmitted to the second-stage ring gear.

In addition, according to the present invention, the first-stage ring gear is fixed to the input unit with a fixture, and the second-stage ring gear meshes with the integrated planetary gear to rotate and is fixed to the output unit with a fixture. gear inner; and a second-stage ring gear outer that is fixed to the input unit with the fixture and rotatably supports the second-stage ring gear inner using bearing balls and retainers.

Additionally, according to the present invention, the input unit includes a motor assembly that is fixed to the vehicle and generates rotational power; and a magnet installed on one side of the carrier of the planetary gear type reduction device so that the carrier can be rotated by the motor assembly, and at least a portion of the magnet is formed to correspond to the motor assembly.

In addition, according to the present invention, the output unit includes a swivel upper bracket that is fixed to the seat frame with a fixture, has a cylindrical receiving space formed therein, and has an open lower side; an output disk installed in the receiving space, fixed to the swivel upper bracket with a fixture, and connected to the planetary gear type reduction device so that it can rotate together with the swivel upper bracket; and a top cover installed in the receiving space, guiding the output disk so that it does not come off, and fixed to the input unit with a fixture.

In addition, according to the present invention, the rotation axis of the motor assembly and the rotation axis of the seat frame are located on the same axis to form a monopost, and wires for supplying power to electronic components installed on the vehicle seat can pass. A central wire hole may be formed inside the output unit, the input unit, and the planetary gear type reduction device so that the output unit, the input unit, and the planetary gear type reduction device have a central wire hole formed therein.

In addition, according to the present invention, it further includes a wire protection device that protects the wires to prevent wear or twisting of the wires passing through the central wire hole, wherein the wire protection device includes the planetary gear. A first bearing installed on the lower inner diameter surface of the carrier of the type reduction device; a second bearing installed on an upper inner diameter surface of the carrier of the planetary gear type reduction device; And a fixed hollow inner cylinder fixed to the motor assembly of the input unit to protect the wire by preventing twisting of the wire, and in which the first bearing and the second bearing are installed to support rotation of the rotating body. You can.

In addition, according to the present invention, the output unit is a locking edge formed in the swivel upper bracket with a U-shaped cross section to freely rotate the swivel upper bracket in normal times and to prevent the swivel upper bracket from being separated in an emergency. It may further include at least one hook bracket having a hook-shaped locking portion spaced apart from the hook.

Meanwhile, a planetary gear-type deceleration device for a power swivel system for a vehicle seat according to the spirit of the present invention for solving the above problems includes: a carrier rotated by an input unit fixed to the vehicle; at least one first planetary gear rotatably installed on one side of the carrier, having a first end at a first height and a second end at a second height; at least one second planetary gear rotatably installed on the other side of the carrier and having a second end formed at the second height and a third end formed at a third height; a first-stage ring gear fixedly installed at the first height such that one internal tooth is inscribed with the first end of the first planetary gear; a two-stage ring gear rotatably installed at the second height such that one internal tooth is inscribed with the second end of the first planetary gear and the second end of the second planetary gear; and one side internal tooth is rotatably installed at the third height so as to be inscribed at the third end of the second planetary gear, and is fixed to the seat frame and disposed on the rotation axis of the seat frame so that it can be swiveled with the seat frame. It may include a three-stage ring gear connected to the output unit.

Meanwhile, a planetary gear-type deceleration device for a power swivel system for a vehicle seat according to the spirit of the present invention for solving the above problems includes: a carrier rotated by an input unit fixed to the vehicle; At least one integrated planetary gear rotatably installed on one side of the carrier; a first-stage ring gear whose internal teeth on one side are fixedly installed to be in internal contact with the lower part of the integrated planetary gear; And one side internal tooth is installed to be internally in contact with the upper part of the integrated planetary gear, is rotatably installed, and is connected to an output unit disposed on the rotation axis of the seat frame so that it can be fixed to the seat frame and swiveled with the seat frame. It may include a two-stage ring gear.

According to some embodiments of the present invention as described above, a planetary gear-type reduction device is built into the monopost-type internal space, so that the passenger's foot space can be comfortably secured in a compact size, and the number of parts is reduced. The unit price of the product can be reduced by reducing the weight of the product, and the brackets are structurally combined together to form a compact structure, making it resistant to collision loads and impacts. As a result, it is possible to satisfy crash tests, and internal and external gears using planetary gears can be used. By using the meshing method of teeth, backlash phenomenon can be prevented, and self-infinite locking of the deceleration device is possible, sheet clearance and joint performance can be greatly improved, and twisting of wires and external exposure of wires can be prevented. It has an effect. Of course, the scope of the present invention is not limited by this effect.

1 is an exploded perspective view showing a power swivel system for a vehicle seat and its planetary gear type reduction device assembled between a seat frame and a seat base according to some embodiments of the present invention.
FIG. 2 is an enlarged external perspective view of the power swivel system of the vehicle seat of FIG. 1 and its planetary gear type reduction device.
FIG. 3 is a cross-sectional view showing a section III-III of the power swivel system of the vehicle seat of FIG. 2.
FIG. 4 is an exploded perspective view of parts showing the power swivel system of the vehicle seat of FIG. 2.
Figures 5 to 8 are perspective views showing step by step the power transmission process of the power swivel system of the vehicle seat of Figure 2.
FIG. 9 shows equations showing an example of a reduction ratio calculation equation for the power swivel system of the vehicle seat of FIG. 2.
Figure 10 is a cross-sectional view showing a power swivel system for a vehicle seat and a planetary gear type reduction device thereof according to some other embodiments of the present invention.
FIG. 11 is an exploded perspective view of parts showing the power swivel system of the vehicle seat of FIG. 10.
Figures 12 to 14 are perspective views showing step by step the power transmission process of the power swivel system of the vehicle seat of Figure 10.
FIG. 15 shows equations showing an example of a reduction ratio calculation equation for the power swivel system of the vehicle seat of FIG. 10.

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

The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art, and the following examples may be modified into various other forms, and the scope of the present invention is as follows. It is not limited to examples. Rather, these embodiments are provided to make the present disclosure more faithful and complete and to fully convey the spirit of the present invention to those skilled in the art. Additionally, the thickness and size of each layer in the drawings are exaggerated for convenience and clarity of explanation.

The terms used herein are used to describe specific embodiments and are not intended to limit the invention. As used herein, the singular forms include the plural forms unless the context clearly indicates otherwise. Additionally, when used herein, “comprise” and/or “comprising” means specifying the presence of stated features, numbers, steps, operations, members, elements and/or groups thereof. and does not exclude the presence or addition of one or more other shapes, numbers, operations, members, elements and/or groups.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will now be described with reference to drawings that schematically show ideal embodiments of the present invention. In the drawings, variations of the depicted shape may be expected, for example, depending on manufacturing technology and/or tolerances. Accordingly, embodiments of the present invention should not be construed as being limited to the specific shape of the area shown in this specification, but should include, for example, changes in shape resulting from manufacturing.

Hereinafter, the vehicle seat power swivel systems 100 and 200 and their planetary gear type reduction devices 30 and 40 according to various embodiments of the present invention will be described in detail with reference to the drawings.

Figure 1 is an exploded perspective view of parts showing the power swivel system 100 of a vehicle seat assembled between the seat frame 2 and the seat base 3 according to some embodiments of the present invention.

As shown in FIG. 1, the power swivel system 100 for a vehicle seat according to some embodiments of the present invention is fixedly installed on the seat frame 2 and the vehicle body capable of swivel rotation or installed to enable long sliding. It is assembled between the seat bases 3, and can be configured in a compact size by embedding a reduction function using a planetary gear, a self-locking function, and a motor inside the monopost-type structure.

FIG. 2 is an enlarged external perspective view showing the power swivel system 100 of the vehicle seat of FIG. 1, FIG. 3 is a cross-sectional view showing the III-III section of the power swivel system 100 of the vehicle seat of FIG. 2, and FIG. 4 is an exploded perspective view of parts showing the power swivel system 100 of the vehicle seat in FIG. 2.

As shown in FIGS. 2 to 4, the power swivel system 100 for a vehicle seat according to some embodiments of the present invention largely includes an input unit 10, an output unit 20, and a planetary gear-type reduction device ( 30) may be included.

For example, as shown in FIGS. 2 to 4, the input unit 20 is disposed on the rotation axis of the output unit 10, is fixed to the seat base 3 of the vehicle, and is connected to the output unit ( 10) may include a driving device that swivels and rotates.

More specifically, as shown in FIGS. 2 to 4, the input unit 20 is formed as a whole in a ring shape and is accommodated in the inner space of the output unit 10 to form a mono post. As a result, the motor assembly 11, which is fixed to the seat base 3 and generates rotational power, and the carrier 31 of the planetary gear type reduction device 30 can be rotated by the motor assembly 11. A magnet 12 is installed on one side of the carrier 31, at least a portion of which is formed to correspond to the motor assembly 11, and to support the magnet 12 and strengthen the magnetic force of the magnet 12. It may include a yoke 13 made of a magnetic material such as iron.

Here, in order to form a monopost, the rotation axis of the motor assembly 11 may be located on the same axis as the rotation axis of the vehicle seat 1, and conventionally, the rotation axis of the motor and the rotation axis of the vehicle seat are aligned. Because they are not located on the same axis, many unnecessary intermediate parts had to be installed in between them. However, in the case of the present invention, a compact mono post structure is possible by arranging these rotation axes on the same axis.

In addition, as shown in FIGS. 2 to 4, for example, the output unit 20 is fixed to the seat frame 2 and can be swiveled with the seat frame 2 by the input unit 10. It may be a movable assembly capable of swivel rotation disposed on the rotation axis of the seat frame 2.

More specifically, as shown in FIG. 3, the output unit 10 is fixed to the seat frame 2 with a fixture, has a cylindrical receiving space formed therein, and has an open lower side. A swivel upper bracket 21 is formed, is installed in the receiving space, is fixed to the swivel upper bracket 21 with a fixture, and is rotated together with the swivel upper bracket 21. An output disk 22 connected to the gear-type reduction device 30 is installed in the receiving space, guides the output disk 22 so that it does not come off, and is fixed to the input unit 10 with a fixture. It may include a top cover (23).

Here, the swivel upper bracket 21 described above can partially reinforce the load or enable solid fixation in consideration of assembly and productivity, and the swivel upper bracket 21 and the top cover 23 are integrated with each other. It is also possible to form .

Therefore, the swivel upper bracket 21 is a monopost-type structure, and a cylindrical receiving space A is formed therein, so that a deceleration function, a self-locking function, and a motor assembly can be compactly incorporated.

FIGS. 5 to 8 are perspective views showing step by step the power transmission process of the power swivel system 100 of the vehicle seat of FIG. 2.

Meanwhile, as shown in FIGS. 2 to 8, the planetary gear type reduction device 30 is installed between the input unit 10 and the output unit 20, and includes two types of planetary gears (P1). )(P2) may be a deceleration device that reduces the rotational power of the input unit 10 and transmits it to the output unit 20.

Here, for example, as shown in FIGS. 3 and 4, the planetary gear type reduction device 30 includes a carrier 31 rotated by the input unit 10, and the carrier 31. At least one first planetary gear (P1) installed to be able to rotate on one side and having a first end (P1a) formed at a first height (H1) and a second end (P1b) formed at a second height (H2) (Planetary gear) is rotatably installed on the other side of the carrier 31, and a second end (P2b) is formed at the second height (H2), and a third end (P2c) is formed at the third height (H3). At least one second planetary gear (P2) formed, and a first stage fixedly installed at the first height (H1) so that one inner tooth is inscribed with the first end (P1a) of the first planetary gear (P1) The ring gear (R1) and the first inner tooth are inscribed with the second end (P1b) of the first planetary gear (P1) and the second end (P2b) of the second planetary gear (P2). 2 The two-stage ring gear (R2) rotatably installed at the height (H2) and one internal tooth rotate at the third height (H3) so that the inner tooth is inscribed in the third end (P2c) of the second planetary gear (P2). This can be installed and may include a three-stage ring gear (R3) connected to the output unit 20.

Here, for example, as shown in FIG. 3, the first planetary gear P1 reduces the rotational speed of the input unit 10 to the first stage and transmits it to the second stage ring gear R2. (P1a) may be formed to have a first diameter (D1), and the second end (P1b) may be formed to have a second diameter (D2) different from the first diameter (D1).

In addition, for example, as shown in FIG. 3, the second planetary gear (P2) secondarily reduces the rotational speed of the second-stage ring gear (R2) so that it can be transmitted to the third-stage ring gear (R3). The second end P2b may be formed to have a third diameter D3, and the third end P2c may be formed to have a fourth diameter D4 that is different from the third diameter D3.

Also, for example, the first stage ring gear R1 may be fixed to the input unit 10 with a fixture. Therefore, when the carrier 31 is rotated by the motor assembly 11 while the first-stage ring gear (R1) is fixed, the first planetary gear (P1) meshed with the first-stage ring gear (R1) The first end (P1a) may be rotated.

In addition, for example, the second stage ring gear (R2) is meshed with the second end part (P1b) of the first planetary gear (P1) and the second end part (P2b) of the second planetary gear (P2) to form the first planetary gear (P1). It is fixed to the second-stage ring gear inner (R21), which rotates at a rotational speed (W1), and the input unit 10 with the fixture, and the second-stage ring gear inner (R21) rotates at a rotational speed (W1) and is fixed to the input unit (10) with the fixture. It may include a two-stage ring gear outer (R22) that rotatably supports the ring gear inner (R21).

Therefore, the second-stage ring gear outer (R22) can rotatably support the second-stage ring gear inner (R21), and the second-stage ring gear inner (R21) of the first planetary gear (P1) It may engage with the second end P1b of the first planetary gear P1, which rotates together with the first end P1a, and rotate at the first rotation speed W1.

At this time, when the second stage ring gear inner (R21) is rotated, the second end part (P2b) of the second planetary gear (P2) meshed with it may roll and rotate.

In addition, for example, the three-stage ring gear (R3) is engaged with the third end (P2c) of the second planetary gear (P2) and rotates at a second rotation speed (W2) that is slower than the first rotation speed (W1). A three-stage ring gear inner (R31) is rotated and fixed to the output unit 20 with a fixture, and is fixed to the input unit 10 with the fixture, and uses a bearing ball (B1) and a retainer (B2) to It may include a three-stage ring gear outer (R32) that rotatably supports the single ring gear inner (R31).

Therefore, the 3-stage ring gear outer (R32) can rotatably support the 3-stage ring gear inner (R31), and the 3-stage ring gear inner (R21) of the second planetary gear (P2) It may engage with the third end portion (P2c), which rotates together with the second end portion (P2b), and rotate at a reduced speed at the second rotation speed (W2).

Here, the vehicle seat 1 and the load of the passenger seated on the vehicle seat 1 are firmly held using the plurality of bearing balls B1 and the retainer B2 installed in rolling contact along the ring-shaped track. It can be rotationally supported, and can be rotated 360 degrees in all directions precisely, firmly, and without play by using the plurality of bearing balls (B1) and the retainer (B2).

More specifically, as shown in FIGS. 4 to 8, the carrier 31 is formed in an overall ring shape so that a hollow portion is formed inside, and has a plurality of bridge portions (B) protruding upward. Formed between the bridge parts (B), at least one first support shaft (S1) rotatably supports the first planetary gear (P1) and the first planetary gear (P1) is rotatable. A carrier lower 311 in which at least one second support shaft (S2) is formed and a hollow portion is formed inside, the bridge portions (B) and the first support shaft (S1) and It may include a carrier upper 312 (carrier upper) formed as a whole in a ring shape to connect the second support shafts S2.

Here, in order to transmit power more uniformly and smoothly, the carrier 31 is formed with four bridge parts (B) arranged at an angle of 90 degrees around the hollow part, and between the bridge parts (B) The two first support shafts (S1) and the two second support shafts (S2) may be arranged alternately.

In addition, for example, in order to more tightly bind the carrier lower 311 and the carrier upper 312 while structurally fixing the planetary gears more firmly, the carrier 31 includes the four It is disposed at an angle on the carrier upper 312 so as to fix the bridge parts B, respectively, and to fix the two first support axes S1 and the two second support axes S2, respectively. It may further include a fixture 313 penetrating (312).

However, the number of the bridge parts (B) or the arrangement of the two first support shafts (S1) and the two second support shafts (S2) are not necessarily limited to the drawings, for example, the bridge parts The number of (B) can be 2 or 1, or 4 or more, and the number of the first support shaft (S1) and the second support shaft (S2) can be 1 each, or 3 or more. Therefore, various numbers and arrangements are possible.

Meanwhile, as shown in FIG. 3, the rotation axis of the motor assembly 11 and the rotation axis of the seat frame 2 are located on the same axis so as to form a mono post, and the electronics installed on the vehicle seat 1 A central wire hole (H) is formed inside the output unit 20, the input unit 10, and the planetary gear type reduction device 30 so that wires (W) for supplying power to components can pass through. It can be.

Therefore, the mono-post type power swivel system 100 according to some embodiments of the present invention is configured as a whole in the form of a mono post, but at the same time, the wires (W) are formed in a hollow shape that passes through the internal central axis without being exposed to the outside. Therefore, it is possible to prevent short-circuiting of wires or damage to parts due to twisting of wires or exposure of wires to the outside, and to secure sufficient leg space and interior space for passengers.

In addition, for example, as shown in FIGS. 3 and 4, the power swivel system 100 for a vehicle seat according to some embodiments of the present invention includes the electric wire (W) passing through the central wire hole (H). A wire protection device 50 may be further included to protect the wire W to prevent wear or twisting of the wires.

More specifically, for example, the wire protection device 50 includes a first bearing 51 installed on the lower inner diameter surface of the carrier 31 of the planetary gear type reduction device 30, and the planetary gear type reduction device 30. The second bearing 52 installed on the upper inner diameter surface of the carrier 31 of the device 30 and the motor assembly 11 of the input unit to protect the wire W by preventing wire twisting. It may include a fixed hollow inner cylinder 53 on which the first bearing 51 and the second bearing 52 are fixed and capable of supporting rotation of the rotating body.

Therefore, according to the wire protection device 50, the fixed hollow inner tube 53 does not rotate during the swivel process and is fixed to the motor assembly 11, thereby protecting the wire W and reducing friction or impact. It is possible to prevent the wire (W) from being excessively twisted.

In addition, for example, the output unit 20 is attached to the swivel upper bracket 21 so as to freely rotate the swivel upper bracket 21 in normal times and prevent the swivel upper bracket 21 from being separated in an emergency. It may further include at least one hook bracket 60 having a hook-shaped hook portion 60a spaced apart from the hook edge portion having a U-shaped cross section.

Therefore, using the hook bracket 60, the swivel rotation of the swivel upper bracket 21 is free in normal times, and in an emergency such as a crash test, when the swivel upper bracket 21 is separated, the locking portion 60a is locked. Combined with the locking part, load capacity and safety in the event of an accident can be greatly improved.

FIGS. 5 to 8 are perspective views showing step by step the power transmission process of the power swivel system 100 of the vehicle seat of FIG. 2.

As shown in FIGS. 5 to 8, when explaining the power transmission process of the power swivel system 100 of the vehicle seat of the present invention in order, first, as shown in FIG. 5, the power transmission process of the carrier 31 As the magnet 12 is rotated by the magnetic force of the motor assembly 11, the carrier 41 may be rotated.

Subsequently, as shown in FIG. 6, when the carrier 31 is rotated by the motor assembly 11 while the first stage ring gear R1 is fixed, the first stage at the first height H1 The first end (P1a) of the first planetary gear (P1) engaged with the ring gear (R1) may roll and rotate.

Subsequently, as shown in FIG. 7, when the first end (P1a) of the first planetary gear (P1) rolls and rotates, the second stage ring gear inner (R21) rotates the first planetary gear (P1). The first end P1a may engage with the second end P1b of the first planetary gear P1, which rotates at the second height H2, and rotate at the first rotation speed W1.

Subsequently, as shown in FIG. 8, when the second-stage ring gear inner (R21) is rotated, the second end (P2b) of the second planetary gear (P2) meshed with it may roll and rotate, and the second When the second end (P2b) of the planetary gear (P2) rolls and rotates, the third stage ring gear inner (R21) is in contact with the second end (P2b) of the second planetary gear (P2) at the third height (H3). It can engage with the third end (P2c), which rotates together, and rotate at a reduced speed to the second rotation speed (W2).

Therefore, the reduced rotational force of the three-stage ring gear inner (R21) can automatically swivel and rotate the seat frame (2) through the output disk (22) and the swivel upper bracket (21) of FIG. 3.

Therefore, by embedding the planetary gear-type reduction device 30 in the monopost-type internal space, it is possible to secure sufficient leg space for passengers with a compact size, reduce the number of parts, and reduce the weight of the product, thereby improving the product The unit cost can be reduced, and the brackets are structurally combined together to form a compact structure, making it resistant to collision loads and impacts. As a result, it can satisfy crash tests, and prevent backlash by using a meshing method of internal and external teeth using planetary gears. In addition to this, reverse locking is possible due to pinching interference, enabling self-locking of the deceleration device, greatly improving sheet clearance and joint performance, and preventing twisting of wires and exposure of wires to the outside.

FIG. 9 shows equations showing an example of a reduction ratio calculation equation of the power swivel system 100 of the vehicle seat of FIG. 2.

As shown in FIG. 9, calculating the rotation speed C of the ring gears R1, R2, and R3 during one rotation of the carrier 31 may be the same as the formula shown in the drawing. At this time, Zr may be the number of teeth of the ring gear, and Zp may be the number of teeth of the pinion gear (planetary gear).

Here, this formula is a formula that calculates the rotation speed of each gear based on the rotation speed of the carrier. In the table of Figure 9, row 1 may represent the rotation speed of the carrier, ring gear (internal gear), and planetary gear. .

However, the reduction ratio calculation formula of the vehicle seat power swivel system 100 according to some embodiments of the present invention is not necessarily limited to the drawing, and the reduction ratio can be calculated using various other methods.

Figure 10 is a cross-sectional view showing the power swivel system 200 of a vehicle seat and its planetary gear type reduction device 40 according to some other embodiments of the present invention, and Figure 11 is a power swivel system of the vehicle seat of Figure 10 ( 200), and FIGS. 12 to 14 are perspective views showing step by step the power transmission process of the power swivel system 200 of the vehicle seat of FIG. 10.

As shown in FIGS. 10 to 14, the planetary gear type reduction device 40 of the power swivel system 200 for a vehicle seat according to some other embodiments of the present invention includes the input unit 10 and the output unit. It is installed between (20) and may be a deceleration device that reduces the rotational power of the input unit 10 and transmits it to the output unit 20 using a single type of integrated planetary gear (PP).

Here, for example, the planetary gear type reduction device 40 includes a carrier 41 rotated by the input unit 10 and at least one integrated planetary gear rotatably installed on one side of the carrier 41. (PP), and a first-stage ring gear (R1) whose internal teeth on one side are fixedly installed to be in contact with the lower part of the integrated planetary gear (PP) and whose internal teeth on one side are installed so as to be inscribed with the upper part of the integrated planetary gear (PP), It is installed to be rotatable and may include a two-stage ring gear (R2) connected to the output unit 20.

Here, if the first-stage ring gear (R1) has, for example, N teeth (N is a natural number), the second-stage ring gear (R2) has M teeth (M is a natural number) different from the N teeth. You can have

At this time, for example, the integrated planetary gear (PP) is a single-tooth planetary gear that can be simultaneously meshed with the first-stage ring gear (R1) and the second-stage ring gear (R2) having different numbers of teeth (N and M). As a gear, the diameter of the lower part and the upper diameter may be formed to be the same so that the rotational speed of the input unit 10 can be reduced and transmitted to the second stage ring gear (R2).

In addition, for example, the carrier 41 is formed in an overall cylindrical ring shape so that a hollow portion is formed inside, and a plurality of bridge portions (B) protruding upward are formed, and the bridge portions (B) are provided between the bridge portions (B). A carrier lower 411 formed with at least one integrated support shaft (SS) rotatably supporting the integrated planetary gear (PP), and a hollow portion formed therein, the bridge parts (B) and the integrated support shaft It may include a carrier upper 412 that is entirely formed in a ring shape to connect the (SS).

In addition, for example, the carrier 41 has two integrated support shafts (SS) arranged at an equal angle of 180 degrees around the hollow portion, and a bridge portion ( B) can be formed.

Here, the carrier 41 further includes a fixture 413 penetrating the carrier upper 412 to secure each of the bridge portions B and each of the two integrated support shafts SS. It can be included.

However, the number of bridge parts (B) or the arrangement of the integrated support shaft (SS) are not necessarily limited to the drawings. For example, the number of bridge parts (B) can be 2 or 1, 4 More than one is possible, and the number of integrated support shafts (SS) can be one, three or more, so various numbers and arrangements are possible.

Meanwhile, as shown in FIG. 10, the rotation axis of the motor assembly 11 and the rotation axis of the seat frame 2 are located on the same axis so as to form a mono post, and the electronics installed on the vehicle seat 1 A central wire hole (H) is formed inside the output unit 20, the input unit 10, and the planetary gear type reduction device 30 so that wires (W) for supplying power to components can pass through. It can be.

Also, for example, the first stage ring gear R1 may be fixed to the input unit 10 with a fixture. Therefore, when the carrier 41 is rotated by the motor assembly 11 while the first-stage ring gear (R1) is fixed, the integrated planet gear (PP) meshed with the first-stage ring gear (R1) rolls. can be rotated

In addition, for example, the second-stage ring gear (R2) meshes with and rotates the integrated planetary gear (PP), and includes a second-stage ring gear inner (R21) fixed to the output unit 20 with a fixture and the input unit ( 10) It may include a second-stage ring gear outer (R22) that is fixed with the fixture and rotatably supports the second-stage ring gear inner (R21) using a bearing ball (B1) and a retainer (B2). there is.

Therefore, the second-stage ring gear outer (R22) can rotatably support the second-stage ring gear inner (R21), and the second-stage ring gear inner (R21) meshes with the integrated planetary gear (PP). It can be slowed down and rotated.

Here, the vehicle seat 1 and the load of the passenger seated on the vehicle seat 1 are firmly held using the plurality of bearing balls B1 and the retainer B2 installed in rolling contact along the ring-shaped track. It can be rotationally supported, and can be rotated 360 degrees in all directions precisely, firmly, and without play by using the plurality of bearing balls (B1) and the retainer (B2).

FIGS. 12 to 14 are perspective views showing step by step the power transmission process of the power swivel system 200 of the vehicle seat of FIG. 10.

12 to 14, when explaining the power transmission process of the power swivel system 200 of the vehicle seat of the present invention in order, first, as shown in FIG. 12, the carrier 41 As the magnet 12 is rotated by the magnetic force of the motor assembly 11, the carrier 41 may be rotated.

Subsequently, as shown in FIG. 13, when the carrier 41 is rotated by the motor assembly 11 while the first-stage ring gear (R1) is fixed, the first-stage ring gear (R1) is engaged with the carrier 41. The integrated planet gear (PP) can be rolled.

Subsequently, as shown in FIG. 14, when the integrated planet gear (PP) rolls and rotates, the second-stage ring gear inner (R21) may mesh with the integrated planet gear (PP) and rotate.

Therefore, the reduced rotational force of the three-stage ring gear inner (R21) can automatically swivel and rotate the seat frame (2) through the output disk (22) and the swivel upper bracket (21) of FIG. 3.

Therefore, by embedding the planetary gear-type reduction device 30 in the monopost-type internal space, it is possible to secure sufficient leg space for passengers with a compact size, reduce the number of parts, and reduce the weight of the product, thereby improving the product The unit cost can be reduced, and the brackets are structurally combined together to form a compact structure, making it resistant to collision loads and impacts. As a result, it can satisfy crash tests, and prevent backlash by using a meshing method of internal and external teeth using planetary gears. In addition to this, reverse locking is possible due to pinching interference, enabling self-locking of the deceleration device, greatly improving sheet clearance and joint performance, and preventing twisting of wires and exposure of wires to the outside.

FIG. 15 shows equations showing an example of a reduction ratio calculation equation of the power swivel system 200 of the vehicle seat of FIG. 10.

As shown in FIG. 15, calculating the rotation speed C of the ring gears R1 and R2 during one rotation of the carrier 41 may be the same as the formula shown in the drawing. At this time, Zr1 may be the number of teeth of the first ring gear (R1), Zr2 may be the number of teeth of the second ring gear (R2), and Zp1 may be the number of teeth of the pinion gear (planetary gear).

Here, this formula is a formula that calculates the rotation speed of each gear based on the rotation speed of the carrier. In the table of Figure 15, row 1 may represent the rotation speed of the carrier, ring gear (internal gear), and planetary gear. .

However, the reduction ratio calculation formula of the vehicle seat power swivel system 200 according to some embodiments of the present invention is not necessarily limited to the drawing, and the reduction ratio can be calculated using various other methods.

Meanwhile, the present invention may include a planetary gear type reduction device 30 of the power swivel system 100 of the vehicle seat described above.

As shown in FIGS. 1 to 9, the planetary gear type reduction device 30 of the power swivel system 100 for a vehicle seat according to some embodiments of the present invention includes an input unit fixed to the seat base 3. A carrier 31 rotated by 10) is installed to be able to rotate on one side of the carrier 31, and a first end P1a is formed at the first height H1, and a first end P1a is formed at the second height H2. At least one first planetary gear (P1) formed with a second end (P1b), rotatably installed on the other side of the carrier 31, and a second end (P2b) formed at the second height (H2) and at least one second planetary gear (P2) having a third end (P2c) formed at the third height (H3), and one inner tooth being inscribed with the first end (P1a) of the first planetary gear (P1). A first-stage ring gear (R1) fixedly installed at the first height (H1), and one inner tooth of the second end (P1b) of the first planetary gear (P1) and the second planetary gear (P2) A two-stage ring gear (R2) rotatably installed at the second height (H2) so as to be in contact with the second end (P2b), and one internal tooth of the second planetary gear (P2) is inscribed in the third end (P2c) of the second planetary gear (P2). An output unit installed to be rotatable at the third height H3 as much as possible and arranged on the rotation axis of the seat frame 2 so that it can be fixed to the seat frame 2 and swiveled with the seat frame 2. It may include a three-stage ring gear (R3) connected to (20).

The planetary gear type reduction device 30 of the vehicle seat power swivel system 100 according to some embodiments of the present invention may have the same configuration and role as the planetary gear type reduction device 30 described above. As such, detailed description will be omitted.

Meanwhile, the present invention may include a planetary gear type reduction device 40 of the power swivel system 200 of the vehicle seat described above.

10 to 14, the planetary gear-type deceleration device 40 of the power swivel system 200 for a vehicle seat according to some other embodiments of the present invention includes an input unit fixed to the seat base 3. A carrier 41 rotated by (10), at least one integrated planetary gear (PP) rotatably installed on one side of the carrier 41, and one side internal tooth of the lower part of the integrated planetary gear (PP) The first-stage ring gear (R1), which is fixedly installed to be internally inscribed, and one internal tooth are installed to be internally inscribed with the upper part of the integrated planetary gear (PP), are rotatably installed, and are fixed to the seat frame (2) to secure the seat. It may include a two-stage ring gear (R2) connected to the output unit 20 disposed on the rotation axis of the seat frame 2 so that it can be swiveled together with the frame 2.

The planetary gear type reduction device 40 of the power swivel system 200 of the vehicle seat according to some other embodiments of the present invention may have the same configuration and role as the planetary gear type reduction device 40 described above. As this is possible, detailed description will be omitted.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the attached patent claims.

1: Vehicle seat
2: Seat frame
3: Seat base
10: input unit
11: motor assembly
12: Magnet
13: York
20: output unit
21: Swivel upper bracket
22: Output disk
23: Top cover
30, 40: Planetary gear type reduction device
31, 41: Carrier
311, 411: Carrier lower
B: Bridge part
S1: first support axis
S2: second support axis
312, 412: Carrier upper
H1: first height
H2: 2nd height
H3: 3rd height
P1: 1st planetary gear
P1a: 1st end
P1b: 2nd end
P2: second planetary gear
P2b: 2nd end
P2c: 3rd end
R1: 1st stage ring gear
R2: 2nd stage ring gear
R21: 2nd stage ring gear inner
W1: first rotation speed
R22: 2-stage ring gear outer
B1: Bearing ball
B2: Retainer
R3: 3rd stage ring gear
R31: 3-stage ring gear inner
W2: Second rotation speed
R32: 3-stage ring gear outer
313, 413: fixture
D1: first diameter
D2: second diameter
D3: Third diameter
D4: fourth diameter
PP: Integrated planetary gear
SS: integrated support shaft
W: wire
H: wire hole
50: Wire protection device
51: first bearing
52: second bearing
53: Fixed hollow inner tube
60: Hook bracket
60a: latching portion
100, 200: Power swivel system for vehicle seats

Claims (20)

An input unit fixed to the vehicle;
an output unit fixed to the seat frame and disposed on the rotation axis of the seat frame so that it can be swiveled with the seat frame by the input unit; and
A planetary gear-type deceleration device installed between the input unit and the output unit, which reduces the rotational power of the input unit and transmits it to the output unit;
A power swivel system for a vehicle seat, including a. According to claim 1,
The planetary gear type reduction device,
a carrier rotated by the input unit;
at least one first planetary gear rotatably installed on one side of the carrier, having a first end at a first height and a second end at a second height;
at least one second planetary gear rotatably installed on the other side of the carrier and having a second end formed at the second height and a third end formed at a third height;
a first-stage ring gear fixedly installed at the first height such that one internal tooth is inscribed with the first end of the first planetary gear;
a two-stage ring gear rotatably installed at the second height such that one internal tooth is inscribed with the second end of the first planetary gear and the second end of the second planetary gear; and
a three-stage ring gear rotatably installed at the third height such that one inner tooth is inscribed in the third end of the second planetary gear and connected to the output unit;
A power swivel system for a vehicle seat, including a. According to claim 2,
The carrier is,
It is formed as a whole in a ring shape so that a hollow part is formed inside, and a plurality of bridge parts protruding upward are formed, and between the bridge parts, at least one first support shaft rotatably supporting the first planetary gear and the a carrier lower on which at least one second support shaft rotatably supports the first planetary gear; and
a carrier upper having a hollow portion formed therein and generally formed in a ring shape to connect the bridge portions with the first support shaft and the second support shaft;
A power swivel system for a vehicle seat, including a. According to claim 3,
The carrier is formed with four bridge parts arranged at an angle of 90 degrees around the hollow part, and two first support axes and two second support axes are alternately arranged between the bridge parts. Power swivel system. According to claim 4,
The carrier is,
a fixture disposed at an angle to the carrier upper and penetrating the carrier upper so as to secure each of the four bridge portions and to secure each of the two first support shafts and the two second support shafts;
A power swivel system for a vehicle seat, further comprising: According to claim 2,
The first planetary gear has a first end formed with a first diameter so that the rotational speed of the input unit can be firstly reduced and transmitted to the second ring gear, and the second end has a second diameter different from the first diameter. It is formed by
The second planetary gear has a second end formed with a third diameter so that the rotational speed of the second ring gear can be secondarily reduced and transmitted to the third ring gear, and the third end has a diameter different from the third diameter. A power swivel system for a vehicle seat, formed with a fourth diameter. According to claim 2,
The first stage ring gear is fixed to the input unit with a fixture,
The second stage ring gear is,
a second-stage ring gear inner meshed with the second end of the first planetary gear and the second end of the second planetary gear and rotated at a first rotational speed; and
A second-stage ring gear outer is fixed to the input unit with the fixture and rotatably supports the second-stage ring gear inner using bearing balls and retainers,
The three-stage ring gear is,
a three-stage ring gear inner meshed with the third end of the second planetary gear, rotated at a second rotational speed slower than the first rotational speed, and fixed to the output unit with a fixture; and
A power swivel system for a vehicle seat comprising: a three-stage ring gear outer fixed to the input unit with the fixture and rotatably supporting the three-stage ring gear inner using a bearing ball and a retainer. According to claim 1,
The planetary gear type reduction device,
a carrier rotated by the input unit;
At least one integrated planetary gear rotatably installed on one side of the carrier;
A first-stage ring gear in which one internal tooth is fixedly installed to be internally in contact with the lower part of the integrated planetary gear and has N teeth (N is a natural number); and
A two-stage ring gear in which one internal tooth is installed to be in contact with the upper part of the integrated planetary gear, is rotatably installed, is connected to the output unit, and has M teeth (M is a natural number) different from the N teeth;
A power swivel system for a vehicle seat, including a. According to claim 8,
The carrier is,
It is formed as a whole in a cylindrical ring shape so that a hollow part is formed inside, a plurality of bridge parts protruding upward are formed, and at least one integrated support shaft rotatably supports the integrated planetary gear is formed between the bridge parts. carrier lower; and
a carrier upper having a hollow portion formed therein and generally formed in a ring shape to connect the bridge portions and the integrated support shafts;
A power swivel system for a vehicle seat, including a. According to clause 9,
The carrier is a power swivel system for a vehicle seat in which two integrated support axes are arranged at an equal angle of 180 degrees around the hollow part, and bridge parts are formed on the left and rear sides of the two integrated support axes, respectively. According to claim 10,
The carrier is,
a fixture penetrating the carrier upper to secure each of the bridge portions and each of the two integrated support axes;
A power swivel system for a vehicle seat, further comprising: According to claim 8,
The integrated planetary gear is a power swivel system for a vehicle seat, wherein the lower diameter and the upper diameter are formed to be the same so that the rotational speed of the input unit can be reduced and transmitted to the second stage ring gear. According to claim 8,
The first stage ring gear is fixed to the input unit with a fixture,
The second stage ring gear is,
a two-stage ring gear inner meshed with and rotated with the integrated planetary gear and fixed to the output unit with a fixture; and
A power swivel system for a vehicle seat comprising: a two-stage ring gear outer fixed to the input unit with the fixture and rotatably supporting the two-stage ring gear inner using a bearing ball and a retainer. According to claim 1,
The input unit,
a motor assembly fixed to the vehicle and generating rotational power; and
A magnet installed on one side of the carrier of the planetary gear type reduction device so that the carrier can be rotated by the motor assembly, and at least a portion of the magnet is formed to correspond to the motor assembly;
A power swivel system for a vehicle seat, including a. According to claim 1,
The output unit,
A swivel upper bracket that is fixed to the seat frame with a fixture, has a cylindrical receiving space formed therein, and has an open lower side;
an output disk installed in the receiving space, fixed to the swivel upper bracket with a fixture, and connected to the planetary gear type reduction device so that it can rotate together with the swivel upper bracket; and
a top cover installed in the receiving space, guiding the output disk so that it does not come off, and fixed to the input unit with a fixture;
A power swivel system for a vehicle seat, including a. According to claim 1,
The rotation axis of the motor assembly and the rotation axis of the seat frame are located on the same axis to form a monopost, and the output unit and the A power swivel system for a vehicle seat, wherein the input unit and the planetary gear type reduction device have a central wire hole formed therein. According to claim 16,
It further includes a wire protection device that protects the wires to prevent wear or twisting of the wires passing through the central wire hole,
The wire protection device is,
a first bearing installed on a lower inner diameter surface of the carrier of the planetary gear type reduction device;
a second bearing installed on an upper inner diameter surface of the carrier of the planetary gear type reduction device; and
a fixed hollow inner cylinder fixed to the motor assembly of the input unit to protect the wire by preventing twisting of the wire, and in which the first bearing and the second bearing are installed to support rotation of the rotating body;
A power swivel system for a vehicle seat, including a. According to claim 15,
The output unit,
In order to allow the swivel rotation of the swivel upper bracket freely in normal times and to prevent the swivel upper bracket from being separated in an emergency, a hook-shaped engaging portion is formed in the swivel upper bracket to be spaced apart from the engaging edge portion having a U-shaped cross section. at least one hook bracket;
A power swivel system for a vehicle seat, further comprising: A carrier rotated by an input unit fixed to the vehicle;
at least one first planetary gear rotatably installed on one side of the carrier, having a first end at a first height and a second end at a second height;
at least one second planetary gear rotatably installed on the other side of the carrier and having a second end formed at the second height and a third end formed at a third height;
a first-stage ring gear fixedly installed at the first height such that one internal tooth is inscribed with the first end of the first planetary gear;
a two-stage ring gear rotatably installed at the second height such that one internal tooth is inscribed with the second end of the first planetary gear and the second end of the second planetary gear; and
One inner tooth is rotatably installed at the third height so as to be inscribed in the third end of the second planetary gear, and is fixed to the seat frame and disposed on the rotation axis of the seat frame so that it can be swiveled with the seat frame. 3-stage ring gear connected to the output unit;
A planetary gear type reduction device for a power swivel system of a vehicle seat, including a. A carrier rotated by an input unit fixed to the vehicle;
At least one integrated planetary gear rotatably installed on one side of the carrier;
a first-stage ring gear whose internal teeth on one side are fixedly installed to be in internal contact with the lower part of the integrated planetary gear; and
One side internal tooth is installed to be in contact with the upper part of the integrated planetary gear, is rotatably installed, and is connected to an output unit disposed on the rotation axis of the seat frame so that it can be fixed to the seat frame and swiveled with the seat frame. 2-stage ring gear;
A planetary gear type reduction device for a power swivel system of a vehicle seat, including a.

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