KR102493499B1 - Driving device - Google Patents

Abstract

The present invention relates to a drive device, and rotation of an output gear, to which the rotational force of a motor is finally output, is constrained in both directions by a brake ring, a wedge ring, and a brake roller. Therefore, the flow of the output gear in the rotational direction is impossible, so that the flow of the sheet in the rotational direction is prevented.

Description

Driving device {Driving device}

The present invention relates to a drive device, and more particularly, to a drive device that provides rotational driving force to a swivel seat of a vehicle.

A swivel seat is a seat configured to be rotatable so that a seated person can turn around in a desired direction in a vehicle interior. Normally, the swivel seat is operated by a driving device including a motor.

1 shows an example of a seat swivel device. The seat swivel device includes a lower member (1) fixed to the floor or seat rail, an upper member (2) rotatably installed on the lower member (1), a fixed gear (3) mounted on the lower member (1), and an upper member. It includes a bracket (4) fixed to (2) and a driving device (5) mounted on the bracket (4).

The driving device 5 includes a motor 5a, a gearbox 5b, and an output gear 5c, and the output gear 5c is meshed with the fixed gear 3.

Therefore, when the motor 5a is operated, the rotational force of the motor is reduced in the gearbox 5b to rotate the output gear 5c, and the output gear 5c rotates around the fixed gear 3. Since the motor 5a and the gearbox 5b are fixed to the upper member 2 with the bracket 4, the upper member 2 is rotated relative to the lower member 1, and thus mounted on the upper member 2. sheet is rotated.

However, in the conventional driving device as described above, backlash occurs in the output gear 5c because a reduction structure using a planetary gear or an internal gear is applied to the inside of the gearbox 5b, and accordingly, the driving device There was a problem that the sheet was not firmly fixed in a stationary state in which it was not operated and flow occurred in the rotational direction.

Republic of Korea Patent Publication No. 2019-0048405 (2019.05.09.)

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a driving device capable of preventing backlash from occurring in the output gear and preventing the flow of the sheet in the rotational direction.

A driving device according to the present invention for achieving the above object includes a motor; a worm mounted on the rotating shaft of the motor; a worm wheel meshed with the worm; a housing in which the motor is mounted on one side and in which the worm and the worm wheel are embedded; a brake ring fixed to the housing; a wedge ring rotatably installed on an inner circumferential surface of the brake ring and rotated by the worm wheel; a gear shaft fixed to the wedge ring and rotated together; A plurality of brake rollers installed between the wedge ring and the brake ring to restrict or release rotation of the wedge ring with respect to the brake ring.

A flange is formed on the rim of the opening of the housing, an installation groove having the same shape as the brake ring is formed on the flange, the brake ring is inserted and seated in the installation groove, and a cover plate is mounted on the flange.

A plurality of wedge surfaces forming wedge gaps in both rotational directions between the wedge ring and the brake ring are formed on the outer circumferential surface of the wedge ring, a pair of brake rollers are disposed on each wedge surface, and the brake rollers are each wedge gap An elastic member that presses in the direction is provided, and the wedge ring is constrained in both rotational directions.

A plurality of unlock protrusions are formed protruding from one side of the worm wheel, and the unlock protrusions are disposed between a pair of brake rollers disposed on the wedge surface, and when the worm wheel rotates, the brake roller in the direction of rotation is moved in the opposite direction to the wedge gap to brake Release the jammed state of the roller to release the restraint state of the wedge ring.

A plurality of guide protrusions are radially formed on the wedge ring, an elastic member is installed between the guide protrusion and the brake roller, and the material of the elastic member is elastomer.

The guide protrusions have the same length in the radial direction, have arc-shaped ends, and slide while being in contact with the inner circumferential surface of the brake ring, so that the brake ring and the wedge ring can maintain a concentric state.

The elastic member is installed between the wedge surfaces, and the elastic member pushes the brake rollers in contact with their ends among the pair of brake rollers provided on both wedge surfaces in the wedge clearance direction.

According to the present invention as described above, by applying a brake structure using a brake ring, a wedge ring, and a brake roller interposed therebetween, backlash does not occur in the output gear, thereby preventing the rotational flow of the sheet.

1 is a perspective view of a seat swivel device to which a driving device is applied;
Figure 2 is an exploded perspective view of the driving device according to the present invention.
3 is a front view of the driving device according to the present invention;
Figure 4 is a rear view of the driving device according to the present invention.
FIG. 5 is a view illustrating a state in which the cover plate of FIG. 4 is removed;
6 is a configuration diagram of a brake unit, which is a main part of the present invention.
Figure 7 is a locking state diagram of the brake unit.
8 (a) to (c) are explanatory views of the unlock operation of the brake unit.
9 is a view showing another embodiment of the brake unit;
10 is a view showing another embodiment of the driving device according to the present invention.

Since the present invention can make various changes and have various embodiments, specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. The thickness of lines or the size of components shown in the accompanying drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention of a user or operator or a precedent. Therefore, definitions of these terms should be made based on the content throughout this specification.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

2 to 5, the drive device according to the present invention includes a motor 10, a worm gear 20, a worm wheel 30, a brake ring 40, a wedge ring 50, and a gear shaft 60 ), a brake roller 70, a housing 80, and a cover plate 90.

The motor 10 is operated by receiving electricity from the battery of the vehicle, and the occupant can control ON/OFF and rotation direction by manipulating a switch separately provided on the side of the seat.

The worm gear 20 is mounted on the rotating shaft 11 of the motor 10.

The worm wheel 30 is meshed with the worm gear 20, and a plurality of unlock protrusions 31 protruding from one side thereof to release the locked state of the brake roller 70.

The housing 80 is formed in a shape capable of accommodating the worm gear 20 and the worm wheel 30, a flat circular flange 81 is formed on the circumference of the opening side, and a plurality of coupling parts 82 are formed on the flange 81 Is protruded outward in the radial direction, and a screw hole is formed in the coupling portion 82.

A motor mount part 83 is formed on one side of the housing 80, and the motor 10 is mounted with bolts.

The brake ring 40 is installed outside the worm gear 20 and the worm wheel 30 built into the housing 80. The inner circumferential surface 41 of the brake ring 40 is formed as a smooth simple circumferential surface, and the same number of coupling parts 42 are formed on the outer circumferential surface at the same position as the coupling portion 82 of the housing 80. A through hole through which the screw 100 passes is formed in the coupling part 42 .

An insertion groove 84 having the same shape as the brake ring 40 is formed in the flange 81 and the coupling portion 82 of the housing 80, and the brake ring 40 is inserted into the insertion groove 84 ( see Figure 5). The depth of the insertion groove 84 is the same as the thickness of the brake ring 40, so in the installed state, the brake ring 40 does not protrude outward from the insertion groove 84 and is on the same plane as the flange 81 of the housing 80. make up

As shown in FIGS. 6 and 7 , the wedge ring 50 is disposed inside the inner circumferential surface 41 of the brake ring 40 .

The wedge ring 50 has a plurality of wedge surfaces 51 formed on its outer circumferential surface. Each wedge surface 51 forms a wedge gap between the inner circumferential surface 41 of the brake ring 40 .

The elastic member 75 presses the brake roller 70 in the wedge gap direction so that the brake roller 70 is caught in the wedge gap, so that the rotation of the wedge ring 50 with respect to the brake ring 40 is restricted.

The wedge surface 51 is composed of a pair of inclined surfaces, and wedge gaps are formed on both sides of the rotational direction by both inclined surfaces, and a brake roller 70 is provided for each inclined surface, so that the wedge ring 50 rotates on both sides of the rotational direction. All cannot be rotated.

For example, the wedge surface 51 may be formed of two inclined surfaces 51a and 51b having a high central portion and decreasing in height toward both sides thereof.

One brake roller 70 is disposed on each of the inclined surfaces 51a and 51b, and when the brake roller 70 moves upward on the corresponding inclined surfaces 51a and 51b, a gap between the brake ring 40 and the wedge ring 50 Being caught, the wedge ring 50 is constrained in both directions of rotation with respect to the brake ring 40, and when the brake roller 70 moves downward, the jammed state is released and the rotation of the wedge ring 50 is free will be.

The gear shaft 60 has an output gear 62 integrally formed on one side of the shaft 61, and a wedge ring 50 is inserted and fixed to the outer circumference of the shaft 61. The shaft 61 that protrudes through the wedge ring 50 passes through the center hole 32 of the worm wheel 30 and is inserted into a center groove formed inside the housing 80 at an end thereof.

The wedge ring 50 is fixed to the gear shaft 60 and rotates integrally, and the worm wheel 30 is not fixed to the gear shaft 60 and rotates separately.

The brake roller 70 is installed between the wedge surface 51 of the wedge ring 50 and the inner circumferential surface 41 of the brake ring 40.

A pair of brake rollers 70 are disposed on each wedge surface 51 . That is, one brake roller 70 is disposed on each inclined surface of the wedge surface 51 . In addition, an unlock protrusion 31 of the worm wheel 30 is disposed between the pair of brake rollers 70.

Meanwhile, the wedge ring 50 may have a plurality of guide protrusions 52 protruding radially on an outer circumferential surface thereof. The number of guide protrusions 52 is equal to the number of unlock protrusions 31 formed on the worm wheel 30, and is half the number of brake rollers 70.

The guide protrusions 52 have the same length in the radial direction from the center of the wedge ring 50, and are formed at equal intervals along the outer circumferential surface of the wedge ring 50, and the radial end surface of the brake ring 40 It is formed in an arc shape with the same curvature as the inner peripheral surface 41 . Therefore, the wedge ring 50 can be stably slid and rotated while in contact with the inner circumferential surface 41 of the brake ring 40, and the concentric state of the brake ring and the wedge ring 50 can always be maintained.

In the assembled state, the unlock protrusion 31 of the worm wheel 30 and a pair of brake rollers 70 are positioned between the guide protrusions 52.

Concave installation grooves 51a are formed on both sides of the proximal end of the guide protrusion 52, and the elastic member 75 can be inserted and seated in the installation grooves 51a. In an uncompressed state, a part of the body of the elastic member 75 protrudes out of the installation groove 51a, and the roller 70 is supported in contact therewith.

As the material of the elastic member 75, elastomer, which is plastic having elasticity like rubber and excellent processability, may be used.

After the brake roller 70 and the elastic member 75 are installed (state of FIG. 5 ), the cover plate 90 is mounted to the flange 81 of the housing 80 with the screw 100 . The cover plate 90 is a substantially circular flat plate, and a coupling portion 92 corresponding to the coupling portion 82 of the housing 80 on a one-to-one basis is formed on its outer circumferential surface, and the coupling portion 92 has a through-hole through which the screw 100 penetrates. A hole is formed.

Therefore, the screw 100 passes through the through-holes formed in the coupling portions 92 and 42 of the cover plate 90 and the brake ring 40 and is fastened to the screw holes formed in the coupling portion 82 of the housing 80, so that the housing A cover plate 90 is mounted on (80).

A center hole 91 is formed in the center of the cover plate 90, so that the output gear 62 of the gear shaft 60 protrudes to the outside of the cover plate 90 through the center hole 91 (FIG. 4 reference). Therefore, the output gear 62 may be engaged with the fixed gear of the seat swivel device.

Now, the operational effect of the driving device according to the present invention will be described.

Normally, the brake roller 70 is pushed in the wedge gap direction by the elastic member 75 as shown in FIG. The wedge ring 50 is locked between the inner circumferential surfaces 41 and cannot rotate with respect to the brake ring 40 . Since the brake ring 40 is fixed to the housing 80, the wedge ring 50 is also fixed.

Since the brake roller 70 restrains the wedge ring 50 on both inclined surfaces 52a and 52b of the wedge surface 51, the wedge ring 50 is restricted from rotation in both rotational directions.

In addition, since the brake roller 70 is tightly sandwiched between the brake ring 40 and the wedge ring 50 as described above to restrict the rotation of the wedge ring 50, the wedge ring 50 may flow in the rotational direction. can't

In addition, since the gear shaft 60 is fixed to the wedge ring 50, flow in the rotational direction cannot occur in the output gear 62 as a matter of course.

Therefore, the fixed gear of the seat swivel device engaged with the output gear 62 is restrained in a non-rotatable state, so that the flow of the seat in the rotational direction can be surely prevented.

Meanwhile, when the driver operates the switch and the motor 10 is operated, the worm gear 20 rotates the worm wheel 30. As the worm wheel 30 is rotated, as shown in (a) of FIG. 8 , the unlock protrusion 31 contacts the brake roller 70 on one side and pushes it.

Therefore, the brake roller 70 pushed by the unlock protrusion 31 moves in the opposite direction of the wedge gap (the lower part of the inclined surface 51b), and thus, as shown in FIG. 8 (b), the brake roller 70 and the wedge surface 51 The restraint state of the wedge ring 50 is released while a gap G is generated therebetween.

At this time, the brake roller 70 pushed by the unlock protrusion 31 moves while compressing the elastic member 75 and comes into contact with the guide protrusion 52 . That is, in a state in which the unlock protrusion 31, the brake roller 70, and the guide protrusion 52 are in close contact with each other, the unlock protrusion 31 moves the brake roller 70 and the guide protrusion 52 according to the rotation of the worm wheel 30. By continuously pushing, the wedge ring 50 can be continuously rotated as shown in FIG. 8 (c).

At this time, the brake roller 70', which is not directly pushed by the unlock protrusion 31, is moved in the opposite direction to the wedge gap (lower side of the inclined surface 51a) by the rotation of the wedge ring 50, and the restraint state is released, thereby releasing the wedge ring. It becomes impossible to suppress the rotation of (50). Therefore, rotation of the wedge ring 50 as described above is possible.

As described above, when the wedge ring 50 is rotated, the gear shaft 60 fixed thereto is rotated and the output gear 62 is rotated so that the seat is rotated in a direction selected by the occupant.

After the seat is rotated in a desired direction, when the occupant stops operating the switch, power supply to the motor 10 is stopped, thereby stopping the rotation of the worm wheel 30.

Therefore, since the unlock protrusion 31 can no longer push the brake roller 70, the brake rollers 70 and 70' are returned to their original positions by the restoring force of the elastic member 75, and thus the wedge ring 50 Again, the output gear 62 is fixed by being restrained by the brake ring 40 and being unable to rotate in both directions, and thus the seat is also fixed.

At this time, since the wedge ring 50 is fixed without flow in both directions by the brake rollers 70 and 70', no rotational flow occurs in the output gear 62, and thus the rotational flow of the sheet is prevented as described above. It's like a bar.

In addition, since the wedge ring 50 is guided to the inner circumferential surface 41 of the brake ring 40 by a plurality of guide protrusions 52 formed radially during rotation, the brake ring 40 and the wedge ring 50 are concentric. As a result, the shaft center position of the gear shaft 60 is accurately maintained, so that the meshing state of the output gear 62 and the fixed gear of the seat swivel device is maintained accurately (good) to maintain good power transmission performance. there will be

On the other hand, Figure 9 shows another embodiment of the brake unit. As in this embodiment, when the guide protrusion 52 is not formed, a coil spring 76, which is another type of elastic member, can be used as a means for pushing the brake roller 70 in the direction of the wedge gap in normal times.

The coil spring 76 is installed between the wedge surfaces 51 in the circumferential direction of the wedge ring 50 and pushes the brake rollers 70 in contact with their ends among the pair of brake rollers 70 on both sides in the direction of the wedge gap. play a role in giving

Since the coil spring 76 easily increases the elastic stroke and reaction force, the brake roller 70 can be pushed more strongly in the direction of the wedge gap, and thus the wedge ring 50 in a stopped state in which the motor 10 does not operate The restraint state of can be maintained more firmly.

Therefore, since the flow of the output gear 62 of the gear shaft 60 can be surely prevented, the seat is more firmly fixed in the rotational direction.

10 shows another embodiment of the present invention.

In this embodiment, a second gear 32 with a smaller number of gear teeth than the worm wheel 30 is formed at the center of one side of the worm wheel 30, and a second gear with a larger number of teeth than that of the second gear 32 ( 35) is engaged, and an unlock protrusion 36 is formed on the side of the second gear 35 to release the locked state of the brake roller 70.

Therefore, the first deceleration is performed between the worm 20 and the worm wheel 30, and the second deceleration is performed between the second gear 32 and the second gear 35, so that the reduction ratio can be increased. Therefore, it is possible to implement the rotation speed of the seat at a more appropriate speed, and the torque is increased according to the deceleration to rotate the seat with a smaller force, thereby enabling the use of a motor 10 having a small capacity.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but this is only exemplary, and various modifications and other equivalent embodiments will be made by those skilled in the art in the field to which the technology belongs. You will understand that it is possible. Therefore, the true technical protection scope of the present invention should be determined by the claims below.

10: motor 11: rotation shaft
20: worm gear 30: worm wheel
31,36: unlock protrusion 32: center hole
33: second gear 35: second gear
40: breaking 41: inner surface
42,82,92: coupling part 50: wedge ring
51: wedge surface 51a, 51b: inclined surface
52: guide projection 60: gear shaft
61: shaft 62: output gear
70, 70 ': brake roller 75: elastic member
76: coil spring 80: housing
81: flange 83: motor mount part
90: cover plate 91: center hole

Claims (7)

with a motor;
a worm mounted on the rotating shaft of the motor;
a worm wheel meshed with the worm;
a housing in which the motor is mounted on one side and in which the worm and the worm wheel are embedded;
a brake ring fixed to the housing;
a wedge ring rotatably installed on an inner circumferential surface of the brake ring and rotated by the worm wheel;
a gear shaft fixed to the wedge ring and rotated together;
A plurality of brake rollers installed between the wedge ring and the brake ring to restrain or release the rotation of the wedge ring with respect to the brake ring; includes,
In the housing, a flat circular flange is formed around the opening, and a plurality of coupling parts protrude outward in the radial direction on the flange,
The brake ring is formed with the same number of coupling parts at the same position as the coupling portion of the housing,
An insertion groove having the same shape as the brake ring is formed in the flange and the coupling part of the housing, so that the brake ring is inserted and seated in the insertion groove.
The depth of the insertion groove is the same as the thickness of the brake ring, so that in the installed state, the brake ring does not protrude outward from the insertion groove and forms the same plane as the flange of the housing,
A drive device, characterized in that a cover plate having a coupling portion corresponding to the coupling portion of the housing on a one-to-one basis is mounted on the flange. The method of claim 1,
The worm wheel has a second gear with a smaller number of gear teeth than the worm wheel at the center of one side,
A second gear with a larger number of gear teeth is engaged with the second gear,
A drive device, characterized in that an unlock protrusion for releasing the locked state of the brake roller is formed on the side of the second gear. The method of claim 1,
A plurality of wedge surfaces forming wedge gaps in both rotational directions between the wedge ring and the brake ring are formed on the outer circumferential surface of the wedge ring, a pair of brake rollers are disposed on each wedge surface, and the brake rollers are each wedge gap A drive device, characterized in that the wedge ring is constrained in both directions of rotation by being provided with an elastic member that presses in the direction. The method of claim 3,
A plurality of unlock protrusions are formed protruding on one side of the worm wheel, and the unlock protrusions are disposed between a pair of brake rollers disposed on the wedge surface, and when the worm wheel rotates, the brake roller in the rotational direction is moved in the opposite direction to the wedge gap, thereby brake A driving device characterized in that the restraint state of the wedge ring is released by releasing the jammed state of the roller. The method of claim 4,
A driving device, characterized in that a plurality of guide protrusions are radially formed on the wedge ring, an elastic member is installed between the guide protrusion and the brake roller, and the elastic member is made of an elastomer. The method of claim 5,
The drive device, characterized in that the guide protrusions have the same radial length, the ends are formed in an arc shape, and are slid in a state in contact with the inner circumferential surface of the brake ring so that the brake ring and the wedge ring maintain a concentric state. The method of claim 3,
The drive device, characterized in that the elastic member is installed between the wedge surfaces, and the elastic member pushes the brake rollers in contact with their ends among the pair of brake rollers provided on both wedge surfaces in the direction of the wedge clearance.

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