JPS5980530A - Spring coupler device - Google Patents

Abstract

PURPOSE:To prevent any play on the driven member side by enabling one end of each of two springs to be engaged with notch parts of a driving member and stopping the other ends at projecting parts of the driven member. CONSTITUTION:A driving member including a driving axis 41, a driven member including a driven axis 61 and a pair of torsion springs 80a and 80b are contained in a pair of casings 20a and 20b. One end of the first spring 8a can be engaged with one notch face of a notch part 45 of a driving member, and the other end is stopped at a projecting part 66a of the driven member, while one end of the second spring 80b can be engaged with the other notch face of the driving member and the other end is stopped at the other projecting part 66 of the driven member. In case the driven member is about to swivel clockwise (counterclockwise), since the spring 80a (80b) is expanded, no play is produced even if there are gaps between the projecting parts 66a, 66b and notch faces 48, 49 of a core part.

Description

Detailed Description of the Invention The present invention allows rotation to be transmitted from the drive side to the slave i#I side, but prevents the transmission of rotation in the opposite direction and restricts play on the driven side. The present invention relates to a thread 1, 1 ring coupler device that allows one-way torque transmission to the side.

The conventional spring coupler device 10 of this building is shown in FIG.
As shown in FIG. 2, a case 14 includes a driving member 11 and a driven member 12 having a protrusion 12a disposed with a gap in a notch 11a formed in the driving member 11, and further, A spring 13 is disposed between the case 14 and the driving member 11, and is connected to the inner wall of the case 14 with a frictional force. When the driving member 11 rotates counterclockwise, the driving member 11 is rotated by the spring 1.
3, and conversely, when rotated clockwise, it engages with the other end 13b of the spring 13. Therefore, no matter which direction the drive member 11 is rotated,
As the spring 13 rotates, the spring 13 engages with the drive member 11 and contracts, and the connection between the spring 13 and the inner wall of the case 14 is released. Thereafter, the driving member notch 11a and the driven member protrusion 12a are engaged with each other via the spring, so that the rotation of the driving member 11 is transmitted to the driven member cutout 12.

On the other hand, when the driven member 12 is rotated, the driven member 12 comes into contact with one of the ends t3a and 13b of the spring 13, regardless of whether the driven member 12 is rotated in the clockwise or counterclockwise direction. In this case, the spring 13 is inevitably expanded, the frictional force between the spring 13 and the inner wall of the case 14 is increased, and the rotation of the driven member 12 is prevented. Rotation is not transmitted from the pawl and driven member 12 to the drive member 11, and the driven member 12 is held at a predetermined position.

However, in this type of conventional device, the spring 13
To release the connection with the inner wall of the case 14, the drive member 1
It is essential to form a gap between the notch 11a of the drive member 11 and the protrusion 12a of the driven member 12 that is sufficient to contract the spring 13 with the ten rotations. However, if this gap is not sufficient, the driving member 11 will immediately come into abutting engagement with the driven member 12, and the driven member 12 will expand the spring 13. Therefore, the connection between the spring 13 and the inner wall of the case 14 is not released, and the drive member 11 cannot rotate. Therefore, both ends 13a of the spring 13
, 13b, the driven member 12 is disposed with a gap between them, resulting in a drawback that the driven member 12 is loose by the amount of this gap. The disadvantages of this driven member include, for example, when used in a window regulator device, it causes the windshield to move vertically, and when it is used in a seat vertical adjustment device, it causes the seat to move up and down, making it difficult for the occupants. Not only is this unpleasant, but it also damages the image of the vehicle.

Therefore, an object of the present invention is to prevent backlash occurring on the driven member side in a spring coupler device of the type mentioned above.

That is, the uninvented spring coupler device includes a casing having a hollow cylindrical chamber inside, a radial notch on the outer circumference, a radial notch on the outer periphery, and a radial protrusion at the center in the axial direction. a driving member having a cylindrical portion, a driven member rotatably arranged coaxially with the driving member within the casing and having a protrusion that loosely fits into a notch of the driving member; It consists of first and second springs that are wound around the outer periphery in parallel with each other in the axial direction through the protrusion and are arranged in pressure contact with the inner wall of the casing, and one end of the first spring is connected to the notch of the drive member. The other end of the second spring can be engaged with the notch surface of the second spring, and the other end of the second spring can be engaged with the other notch surface of the notch of the driving member. The other end of the door is latched to the other side of the protrusion of the driven member.

Furthermore, the spring clipping device of the present invention has a second configuration in which the other ends of the first and second springs are respectively engaged with retaining grooves formed on one side or the other side of the protrusion of the driven member. In the particular invention, the retaining groove has a relative angle difference with respect to the radial bending angle of the other end of the spring, and the casing is preferably formed in two parts in the axial direction. and are integrally constructed by a connecting means such as a flange. The drive member typically has a drive shaft (or input shaft) to receive a rotational force from the outside, and on the other hand,
Receives the driven shaft coaxially. The drive member further accommodates a driven portion within its cylindrical portion, and the driven portion typically outputs rotational force via a driven shaft. However, the output shaft and the driven shaft can be replaced by other rotational force transmission means as appropriate, for example, the driven shaft may be a pinion gear itself. The drive shaft and the driven shaft are each supported by a side plate of the casing.

The shaft of the drive part and the cylindrical part are preferably connected by a disc part, which can further project outwardly to form the protrusion.

As a result of the above configuration, the spring kagura device of the present invention has the following features:
When the drive member is rotated, one of the first and second springs is engaged with the cutout surface of the cutout portion of the drive member depending on the direction of the rotational force.

The engaged spring is contracted during the displacement of the driving member until it becomes integral with the driven member, so that the connection with the inner wall of the case is released. Furthermore, when the drive member is rotated,
The driven member also rotates in the same direction. As the driven member rotates, the end of the other spring is locked to the driven member, so the other spring is contracted at the same time, and the connection with the inner wall of the case is released. . Therefore, the rotation of the driving member is transmitted to the driven member.

On the other hand, when the driven member attempts to rotate in either the clockwise or counterclockwise direction, the first and second
One of the springs will necessarily be expanded. Therefore, even if there is a gap between the driven member and the driving member, the connection with the inner wall of the case is not released, so the driven member does not play, and the object of the invention is achieved.

Furthermore, since there is no backlash in the driven member, there is an effect that the contact noise between the driven member, the driving member, and the spring that would otherwise occur due to this play is eliminated.

Furthermore, since the case is divided into two parts and faced from both sides, assembly is as easy as a conventional spring coupler, and the case can be easily press-formed (deep drawing).

In the spring coupler with the configuration of Literature 2, the locking groove of the driven member protrusion and the spring end are locked at different angles, so it has the effect of being able to lock firmly without any play without using special parts. However, it is more suitable for the purpose of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a spring kagura device according to the present invention will be described below with reference to the accompanying drawings. As shown in detail in FIG. 3, the spring coupler device according to the present invention includes a pair of casings 20a and 20b, a driving member 40 housed in these casings 20a and 20b, and a driven member 6u.
It basically consists of a pair of torsion springs 80a and 80b. The pair of casings 20a and 20b are
It consists of a driving side casing 20a and a driven side casing 20b, the former having a circular recess 21a and a circular flange '2.
2a, the latter has a circular recess 21b and a rectangular flange 2.
2b. Holes 23a and 2 are provided at the bottom of the recesses of these casings, through which the driving member 400 Å shaft 41 and the output shaft 61 of the driven member 60 are pivotally supported.
3b are provided respectively. These casings 20
a, 20b are the fourth screws 24 and nuts 25.
As shown in the figure, the drive member 40 is assembled into one piece and has a drive member 40 inside.
, forming a cylindrical space that accommodates the driven member 60 and springs 80a, 80b.

As shown in FIGS. 3 and 5, the drive member 40 consists of an input shaft 41 that is pivotally supported by the casing 20a via a bushing 62, and a cylindrical core portion 42. It consists of a circular disc part 43 integrally fixed to one end, and a cylindrical ring part 44 provided on the outer peripheral edge of this disc part 43. The ring portion 44 and the disk portion 43 are provided with a cutout portion 45 that extends at a predetermined angle from the central axis, as shown in FIGS. 5 and 6.

A protrusion 46 is provided on the outer periphery of the cylindrical ring portion 44 to separate the two torsion springs 80a, 80b in the axial direction. The outer diameter of this protrusion 46 is set in the casing recess 21a so that the drive member 40 can freely rotate within the casings 20a and 20b.

The outer diameter of the cylindrical ring portion 44 is slightly smaller than the inner diameter of the cylindrical ring portion 21b, and the outer diameter of the cylindrical ring portion 44 is such that the torsion springs 80a and 80b can be disposed between the ring portion and the inner wall 47 of the recess.

As shown in FIGS. 3 and 5, the driven member 60 includes an output shaft 61 that penetrates the driven side casing 20b via a bush 62, a plate portion 63 perpendicular to the output shaft 61, and a shaft opposite to the output shaft 61. Plate part 6 on the side
It consists of an auxiliary shaft 64 fixed to 3. The auxiliary shaft 64 has the same center axis X as the output shaft 61, and is supported concentrically by the core portion 42 of the drive member 40 and the input shaft 41 as shown in FIG. That's what I'm thinking of. More preferably, as shown in FIG. 5, the auxiliary shaft 64 is extended so that it can be securely held in the hole 23a of the drive side casing 20a. As shown in FIG. 6, the plate portion 63 has a portion 65 that extends with a gap into the cutout portion 45 of the core portion 42 of the drive member 40, and the ends of torsion springs 80a and 80b are arranged on both sides of this extended portion 65. 81 a”, 8
Protrusions 66a, 66b for locking the spring ends 81a", 81b" are provided in the projections 66a, 66b, as shown in FIG. Grooves 67a and 67b are provided.The outer diameter of the extended portion 65 of the driven member 60 is
The torsion springs 80a, 80 are slightly smaller than the inner diameter of the casings 20a, 20b so that they can rotate freely inside the casings 20a, 20b, and the torsion springs 80a, 80 are provided between the outer peripheries of the protrusions tfB 66a, 66b and the casing inner wall 47.
A gap is provided in which b is placed.

The pair of torsion springs 80a and 80b are, for example, right-handed as shown in the figure, and both are attached to the outer periphery of the cylindrical ring portion 44 of the driving member 40 and the protrusion 6 of the driven member 60.
It is arranged between the outer peripheries of 6a and 66b and the casing inner wall 47. The outer diameters of the springs 80 a and 80 b are larger than the inner diameters of the casings 20 a and 20 b before the casings are inserted.
Pressed with frictional force. The outer end 81a' of the drive-side torsion spring 80a is bent inward at an acute angle as shown in FIG. That is, the inner end 8
1 a' is similarly bent inward and is locked in a slit groove 67a provided in the protrusion 66a of the driven member 60. Since the bending angle of the spring inner end 81a'' and the radial angle of the spring 467a are slightly different, the spring end 81a'' is firmly locked.

The inner end 8 l b'' of one driven side torsion spring 80b separated by the protrusion 46 is connected to the driven member 60.
The outer end 81b' is secured to the sling M467b of the protrusion 66b at a different angle as in the case of the drive part, and the outer end 81b' is arranged so as to be able to be fitted to the other notch surface 49 of the notch 45 of the core part 42. ing. Note that the casing 20 is separately attached to a fixed member such as a vehicle body or a door.

To describe the operation of this embodiment, the drive member 40 is
When rotated in the counterclockwise direction (arrow A in FIG. 4) in the figure, the outer end 81b of the driven side torsion spring 80b
' is engaged with the notch surface 48 of the core part, and the spring 80b
is contracted and released from the inner wall 47 of the casing. Thereafter, the cutout portion 4-8 comes into contact with the plate extension portion 65 of the driven member 60, and the plate portion 63 also rotates together.

Therefore, the drive side torsion spring 80a rotates counterclockwise from the inner end 81a'', that is, the end 81a'' that is locked in the slit groove 67a of the drive side protrusion 66a of the plate, and the drive side torsion spring 80a rotates counterclockwise. The connection with the casing inner wall 47 is also released. Therefore, the torsion spring 80a.

80b is released from the casing inner wall 47, allowing torque to be transmitted from the driving member 40 to the driven member 60.

Next, when the driving member 40, that is, the core portion 42 attempts to rotate clockwise in FIG. 6 (arrow B in FIG. 4), first the driving side spring 80a and then the driven side spring 80b are rotated against the casing inner wall 47. The connection between the drive member 4o and the driven member 60 is released, and torque can be transmitted from the drive member 4o to the driven member 60.

Next, when the driven member 60, that is, the plate portion 63 attempts to rotate counterclockwise in FIG. Since the side spring 80b expands, when the driven member 60 tries to lock, the drive side spring 80a, whose inner end 81a# is locked in the slit groove 67, a of the drive side protrusion 66a of the plate portion 63, expands. Therefore, the driven member 60 is locked and cannot be rotated. Therefore, if the protrusions 66a and 66b of the plate portion 63 and the core portion 42
Even if there is a −j gap between the notch portions 48 and 49 of the plate portion 63, that is, the slave wJ member 60, the plate portion 63, that is, the slave wJ member 60, is locked in a predetermined position without any play, and the torque transmission from the slave member 60 to the drive member 40 is prevented. thwarted.

FIG. 7 shows another embodiment in which the protrusions 66a and 66b of the plate portion 63 are improved. In this embodiment, the driven member 60
That is, when the plate portion 63 rotates, the spring end portion 81
The difference is that the protrusion 66' on the side that presses extends close to the casing inner wall 47. With this configuration, shearing force does not act on the bent portion of the spring with the corresponding end of the retaining groove, but acts as a buckling force on the bent portion, so that the driven member 60 The breakage of the spring end 81 that occurs during locking is reduced. FIG. 8 further shows a modification 66" of the protrusion 66' of FIG. 7. The protrusion 66"
A corresponding curved surface is formed at the abutting part with the spring bending part to protrude from at least the opposite end of the locking groove to more completely prevent shearing force acting on the spring bending part.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional spring coupler device, Fig. 2 is a front view of the coupler device shown in Fig. 1, and Fig. 3 is a sectional view showing a conventional spring coupler device.
The figure is an exploded view of a spring coupler device according to the present invention, FIG. 4 is a perspective view showing a state in which the spring coupler device according to the present invention is assembled together, and FIG. 6 is a sectional view taken along arrow Vl--■ in FIG. 5, and FIGS. 7 and 8 are views similar to FIG. 6 showing an embodiment in which the protrusion of the driven member is improved. 20a, 20b...Casing, 40...Drive member, 45...Notch, 48.49...Notch surface, 60...
...Followed member, 66a, 66b-Protrusion, 80
a, 80b...Torsion spring. Applicant Aisin Seiki Co., Ltd. Agent Patent Attorney Asa Kato Road No. 7rM No. 81! I

Claims (2)

[Claims] (1) A drive member having a casing having a hollow cylindrical chamber therein, and a cylindrical part rotatably disposed within the casing, having a radial notch on the outer periphery and a radial protrusion in the center in the axial direction. a driven member rotatably arranged coaxially with the drive member within the casing and having a protrusion that loosely fits into the notch of the drive member; It consists of first and second springs wound in parallel in the axial direction and placed in pressure contact with the inner wall of the casing, one end of the first spring engaging with the negative notch surface of the notch of the drive member. and the other end is locked to one side of the protrusion of the driven member,
A spring coupler device, wherein one end of the second spring is engageable with another notch surface of the notch of the driving member, and the other end is locked to the other side of the protrusion of the driven member. (2) A drive member having a casing having a hollow cylindrical chamber inside, and a cylindrical portion rotatably disposed within the casing, having a radial notch on the outer periphery and a radial protrusion in the center in the axial direction. a driven member rotatably arranged coaxially with the drive member within the casing and having a protrusion that loosely fits into the notch of the drive member; The windings are wound in parallel in the axial direction and are arranged in pressure contact with the inner wall of the casing. :, Ki 1
and a second spring, one end of the first spring can be engaged with the - notch surface of the notch of the driving member, and the other end is an engagement groove formed on one side of the protrusion of the driven member. One end of the second spring can be secured to the other notch surface of the notch of the driving member, and the other end can be secured to the retaining 7m formed on the other side of the protrusion of the driven part. The spring clipping device L is characterized in that the retaining groove has a relative angle difference with respect to the radial bending angle of the other end of the spring.