JP2012041943A - Clutch unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of components and simplify assembling.SOLUTION: A clutch unit is composed of: a lever side clutch part which is disposed on the input side and controls the transmission and cutoff of a rotation torque to the output side; and a brake side clutch part 12 which is disposed on the output side, transmits the input torque from the lever side clutch part to the output side and cuts off a reverse input torque from the output side. The brake side clutch part includes: an output shaft 22; a brake side outer wheel 23 and a brake side lateral plate 25 which are arranged on the outside of the output shaft and have restrained rotation; a ring part 29a which is arranged on the inside of the output shaft and applies a rotation resistance by friction force caused between the brake side lateral plate and the ring part 29a; a plurality of pairs of cylindrical rollers 27 which are arranged on a wedge aperture 26 between the brake side outer wheel and the output shaft, and control the transmission of the input torque and the cutoff of the reverse input torque in accordance with the engagement and release on the wedge aperture; and projection parts 29b which are arranged between the respective pairs of cylindrical rollers and apply repulsive force to the pairs of cylindrical rollers; wherein the ring part and the projection parts are integrated.

Description

  The present invention includes a lever-side clutch portion that transmits rotational torque from the input side to the output side, a brake-side clutch portion that transmits rotational torque from the input side to the output side, and blocks reverse input torque from the output side, It is related with the clutch unit which has.

  In general, in a clutch unit using an engagement element such as a cylindrical roller or a ball, a clutch portion is disposed between an input side member and an output side member. The clutch portion is configured to control transmission / cutoff of input torque by engaging / disengaging an engagement element such as a cylindrical roller or a ball in a wedge clearance formed between the input side member and the output side member. It has become.

  The present applicant, for example, is incorporated in an automobile seat lifter that adjusts the seat seat up and down by lever operation, and transmits a rotational torque from the input side to the output side, and outputs a rotational torque from the input side. A clutch unit having a brake side clutch portion that transmits to the side and interrupts reverse input torque from the output side has been previously proposed (for example, see Patent Document 1).

  27 is a longitudinal sectional view showing the entire configuration of the conventional clutch unit disclosed in Patent Document 1, FIG. 28 is a sectional view taken along line DD in FIG. 27, and FIG. 29 is taken along line EE in FIG. FIG.

  As shown in FIGS. 27 and 28, the lever-side clutch unit 111 includes a lever-side outer ring 114 as an input-side member to which torque is input by lever operation, and torque from the lever-side outer ring 114 as a brake-side clutch unit 112. And a cylindrical roller 116 as a plurality of engagement elements for controlling transmission / interruption of input torque from the lever-side outer ring 114 by engagement / disengagement between the lever-side outer ring 114 and the inner ring 115. A retainer 117 that holds each cylindrical roller 116 at a predetermined interval in the circumferential direction, a brake-side outer ring 123 as a stationary side member that is constrained to rotate, and a cover 124 that will be described later as a retainer 117 and a stationary side member. The elastic force is accumulated by the input torque from the lever side outer ring 114, and the accumulated elastic force is released by releasing the input torque. Provided between the inner centering spring 118 as a first elastic member for returning the cage 117 to the neutral state, the lever side outer ring 114 and the cover 124, and accumulates elastic force with the input torque from the lever side outer ring 114. The main part is composed of the outer centering spring 119 as a second elastic member that returns the lever-side outer ring 114 to the neutral state by the accumulated elastic force by releasing the input torque.

  In the figure, 113 is a lever side plate that is fixed to the lever side outer ring 114 by caulking and constitutes an input side member together with the lever side outer ring 114, and 131 is a washer attached to the output shaft 122 via a wave washer 130. .

  On the other hand, as shown in FIGS. 27 and 29, the brake side clutch portion 112 is a brake side outer ring 123 as a stationary side member whose rotation is restricted, and a connecting member to which torque from the lever side clutch portion 111 is input. The inner ring 115, the output shaft 122 for outputting torque, the wedge clearance between the brake side outer ring 123 and the output shaft 122, and the inner ring 115 by engagement / disengagement between the brake side outer ring 123 and the output shaft 122. The main part is constituted by a plurality of pairs of cylindrical rollers 127 that control transmission of input torque from the output shaft and interruption of reverse input torque from the output shaft 122.

  The enlarged diameter portion 115c that extends radially outward from the axial end portion of the inner ring 115 and bends in the axial direction functions as a cage that holds the cylindrical rollers 127 at predetermined intervals in the circumferential direction. In the figure, reference numerals 124 and 125 denote a cover and a brake side plate that form a stationary member together with the brake side outer ring 123. The brake side outer ring 123 and the cover 124 are integrally crimped and fixed by the brake side plate 125. Reference numeral 128 denotes a leaf spring having an N-shaped cross section, for example, disposed between each pair of cylindrical rollers 127, and 129 is a friction ring as a braking member attached to the brake side plate 125.

JP 2009-210114 A

  Incidentally, in the conventional clutch unit disclosed in Patent Document 1, the leaf spring 128 constituting the brake side clutch portion 112 is made of a metal elastic member, and is disposed between each pair of cylindrical rollers 127 to form a pair. The function of energizing the separating force to the cylindrical roller 127 is exhibited. Similarly, the friction ring 129 constituting the brake side clutch portion 112 is disposed inside the output shaft 122 and exhibits a function of imparting rotational resistance by a frictional force generated between the output shaft 122 and the friction ring 129. is there.

  In the brake side clutch portion 112, as shown in FIG. 29, a pair of cylindrical rollers 127 are disposed in a wedge clearance 126 formed between the brake side outer ring 123 and the output shaft 122, and a pair of cylinders is formed. A structure in which a leaf spring 128 is disposed between the rollers 127 is provided. The leaf spring 128 urges each pair of cylindrical rollers 127 with a reverse input torque from the output shaft 122, so that the cylindrical rollers 127 have a wedge clearance 126 between the output shaft 122 and the brake-side outer ring 123. The output shaft 122 is locked with respect to the brake side outer ring 123 by engaging.

  On the other hand, as shown in FIG. 30, the friction ring 129 is provided with circular protrusions 129 a at a plurality of circumferential positions on the end face thereof, and the protrusions 129 a are press-fitted into the holes 125 c of the brake side plate 125 to be fitted. Thus, the brake side plate 125 is fixed to the stationary side member (see FIG. 27). As a result, the friction ring 129 is prevented from rotating with respect to the brake side plate 125. The friction ring 129 is press-fitted to the inner peripheral surface 122e of the annular recess 122b of the output shaft 122 with a margin. Thus, the inner peripheral surface 122e of the annular recess 122b of the output shaft 122 slides on the outer peripheral surface 129c of the friction ring 129 that is prevented from rotating around the brake side plate 125. At this time, a rotational resistance is applied to the output shaft 122 by the frictional force generated between the outer peripheral surface 129c of the friction ring 129 and the inner peripheral surface 122e of the annular recess 122b of the output shaft 122.

  As described above, the brake-side clutch portion 112 of the conventional clutch unit requires two components including the leaf spring 128 and the friction ring 129, and the leaf spring 128 and the friction ring 129 must be assembled sequentially. All of the plurality (six in the figure) of the leaf springs 128 must be inserted between the cylindrical rollers 127 disposed between the brake-side outer ring 123 and the output shaft 122. Further, the friction ring 129 must be assembled between the brake side plate 125 and the output shaft 122. Thus, in the case of the conventional clutch unit, it is difficult to reduce the number of parts and to simplify the assembly, which hinders cost reduction.

  Accordingly, the present invention has been proposed in view of the above-described improvements, and an object of the present invention is to provide a low-cost clutch unit that can reduce the number of parts and simplify the assembly.

  The clutch unit according to the present invention is provided on the input side, and controls the transmission / cut-off of rotational torque to the output side by lever operation, and the input side torque from the lever side clutch unit provided on the output side. Is transmitted to the output side, and the brake side clutch portion interrupts the reverse input torque from the output side. The brake side clutch portion is disposed outside the output side member that outputs torque. Between the stationary side member and the output side member, the stationary side member that is constrained to rotate, the friction part that is disposed inside the output side member, and that imparts rotational resistance by the friction force generated between the stationary side member and the stationary side member A plurality of pairs of engagement elements that control transmission of input torque and blocking of reverse input torque by engagement / disengagement between both members, and each pair of engagement elements. Separate the engagement element And an elastic portion for urging the, characterized in that integrated them friction portion and the elastic portion. The engaging member of the brake side clutch is preferably a cylindrical roller.

  In the present invention, a friction part that is disposed inside the output side member and imparts rotational resistance by a friction force generated between the output side member and a pair of engagement elements that are disposed between each pair of engagement elements. By integrating the elastic part that urges the separation force into the conventional structure, two components, a friction ring and a leaf spring, were required in the past. The combined friction part and elastic part can be constituted by one component part, and the number of parts can be reduced and the assembly can be simplified.

  In the present invention, a structure in which a notch portion is formed in the output side member and an elastic portion extending from the friction portion is inserted into the notch portion is desirable. By adopting such a structure, the friction part and the elastic part can be easily integrated.

  The friction portion in the present invention has a ring shape and has a structure having an inner peripheral surface that slides with respect to the stationary side member. Since the elastic part of the present invention has a structure integrated with the friction part, for example, by being inserted into a notch formed in the output side member, the friction part is interlocked with the output side member. For this reason, rotational resistance is imparted to the output side member by sliding the inner peripheral surface of the ring-shaped friction portion relative to the stationary side member. If it does in this way, provision of rotation resistance by a friction part will become easy.

  The friction part and the elastic part in the present invention are preferably made of resin. In this way, in the structure in which the friction portion and the elastic portion are integrated, the function of the friction portion that imparts rotational resistance by the friction force generated between the stationary member and the separating force applied to the pair of engaging elements. Both functions of the urging elastic portion can be easily exhibited.

  The lever side clutch portion in this clutch unit includes an input side member to which torque is input by lever operation, a connecting member that transmits torque from the input side member to the brake side clutch portion, and between the input side member and the connecting member. A plurality of engagement elements that control transmission / cutoff of input torque from the input side member by engagement / disengagement, a cage that holds the engagement elements at predetermined intervals in the circumferential direction, and a stationary side member that is restricted in rotation And an elastic force that is provided between the cage and the stationary member, accumulates an elastic force with an input torque from the input side member, and releases the input torque to return the cage to a neutral state with the accumulated elastic force. One elastic member, provided between the input side member and the stationary side member, accumulates the elastic force with the input torque from the input side member, and releases the input torque to cause the input side member to move with the accumulated elastic force. Neutral state Configuration and a second elastic member for restoring are possible. In addition, it is desirable that the engaging member of the lever side clutch portion is a cylindrical roller.

  The clutch unit according to the present invention is suitable for automobile use by incorporating the lever side clutch part and the brake side clutch part into the automobile seat lifter part. In this case, the input side member is coupled to the lever, and the output side member is connected to the link mechanism of the automobile seat lifter unit.

  According to the present invention, the brake-side clutch portion is disposed on the output side member from which torque is output, the stationary side member that is disposed outside the output side member and restricted in rotation, and the output side member. The friction part that provides rotational resistance by the friction force generated between the stationary member and the stationary member, and the wedge clearance between the stationary member and the output member, are input by engagement / disengagement between both members. A plurality of pairs of engagement elements for controlling transmission of torque and blocking of reverse input torque, and an elastic portion disposed between each pair of engagement elements and energizing a separating force to the pair of engagement elements, and friction between them. By integrating the elastic part and the elastic part, the conventional friction part and elastic part having both functions of the friction ring and the leaf spring can be constituted by one component, and the number of parts can be reduced and the assembly can be simplified. . As a result, it is possible to provide a low-cost clutch unit with good assemblability.

It is a longitudinal section showing the whole clutch unit composition in an embodiment of the present invention. It is a right view of FIG. It is a left view of FIG. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG. (A) is sectional drawing which shows a lever side side board, (b) is a left view of (a). (A) is sectional drawing which shows an example of a lever side outer ring | wheel, (b) is a left view of (a), (c) is a right view of (a). (A) is sectional drawing which shows an inner ring | wheel, (b) is a left view of (a). It is a perspective view which shows a holder | retainer. (A) is sectional drawing which shows a holder | retainer, (b) is a left view of (a), (c) is sectional drawing of (a). It is a perspective view which shows an inner side centering spring. It is a perspective view which shows an outer side centering spring. (A) is the perspective view which looked at the output shaft from one side, (b) is the perspective view which looked at the output shaft from the other side. (A) is sectional drawing which shows an output shaft, (b) is a left view of (a), (c) is a right view of (a). (A) is sectional drawing which shows a brake side outer ring | wheel, (b) is a left view of (a). (A) is sectional drawing which shows a cover, (b) is a left view of (a). (A) is sectional drawing which shows a brake side side board, (b) is a right view of (a). (A) is a front view which shows a friction ring, (b) is a right view of (a). (A) is a perspective view which shows the state before attaching a brake side outer ring | wheel to a brake side side plate, (b) is a perspective view which shows the state after attaching a brake side outer ring | wheel to a brake side side plate. It is a perspective view which shows the state which assembled | attached the brake side outer ring | wheel and the cover to the brake side side plate. It is a perspective view which shows the state which integrated the brake side side board, the brake side outer ring | wheel, and the cover by crimping. It is sectional drawing which follows the CC line of FIG. (A) is a perspective view showing a state before the cage is assembled to the brake side plate, the brake side outer ring, the cover and the inner centering spring, and (b) is the brake side plate, the brake side outer ring, the cover and the inner centering spring. It is a perspective view which shows the state after attaching a holder | retainer with respect to it. It is a perspective view which shows the state before attaching an output shaft, a friction ring, and a brake side plate. It is a conceptual diagram which shows the seat seat of a motor vehicle. (A) is a conceptual diagram which shows one structural example of a sheet lifter part, (b) is the principal part enlarged view. It is a longitudinal cross-sectional view which shows the whole structure of the conventional clutch unit. FIG. 28 is a transverse sectional view taken along the line DD of FIG. 27. FIG. 28 is a transverse sectional view taken along line EE in FIG. 27. In the conventional clutch unit, it is a perspective view which shows the state before assembling | attaching an output shaft, a friction ring, and a brake side plate.

  1 is a longitudinal sectional view showing an overall configuration of a clutch unit X according to an embodiment of the present invention, FIG. 2 is a right side view of the clutch unit X shown in FIG. 1, and FIG. 3 is a left side view of the clutch unit X shown in FIG. 4 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 5 is a cross-sectional view taken along line BB in FIG. 6 to 18 are diagrams showing main components of the clutch unit X. FIG. 19 to 24 are views showing the assembled state of the main components of the clutch unit X. FIG.

  The clutch unit X is incorporated in an automobile seat lifter section (see FIGS. 25 and 26A and 26B) that adjusts the height of the seat by, for example, operating a lever. As shown in FIGS. 1 to 5, the clutch unit X is formed by unitizing a lever side clutch portion 11 provided on the input side and a brake side clutch portion 12 having a reverse input cutoff function provided on the output side. It has a configuration.

  As shown in FIGS. 1, 2, and 4, the lever-side clutch unit 11 includes, for example, a lever-side plate 13 and a lever-side outer ring 14 as input-side members to which an operation lever (not shown) is coupled, A wedge clearance formed between an inner ring 15 as a connecting member that transmits torque from the lever-side outer ring 14 to the brake-side clutch portion 12, and an outer peripheral surface 15a of the inner ring 15 and an inner peripheral surface 14a of the lever-side outer ring 14. For example, a plurality of cylindrical rollers 16 serving as engagement elements disposed at 20, a cage 17 that holds the cylindrical rollers 16 at equal intervals in the circumferential direction, and a first for returning the cage 17 to a neutral state An inner centering spring 18 that is an elastic member and an outer centering spring 19 that is a second elastic member for returning the lever-side outer ring 14 to a neutral state are provided. A washer 31 is press-fitted into the end of the output shaft 22 described later via a wave washer 30 to prevent the component parts from coming off (see FIG. 1).

  As shown in FIGS. 1, 3 and 5, the brake side clutch portion 12 having a reverse input blocking function as a lock type is used as a connecting member to which torque from the lever side clutch portion 11 is input. Inner ring 15, output shaft 22 as an output side member, brake side outer ring 23, cover 24 and brake side side plate 25 as stationary side members restricted in rotation, and wedge between the brake side outer ring 23 and output shaft 22 A plurality of pairs of engagement elements disposed in the clearance 26 and controlling transmission of input torque from the inner ring 15 and interruption of reverse input torque from the output shaft 22 by engagement / disengagement between the brake side outer ring 23 and the output shaft 22. The friction roller is disposed between the cylindrical roller 27, the output shaft 22 and the brake side plate 25, and provided with protrusions 29b as elastic portions at a plurality of locations on the outer periphery of the ring portion 29a as a friction portion. The main part in a grayed 29 is configured. The output shaft 22 is provided with a protrusion 22f, and a hole 15d into which the protrusion 22f is inserted with a clearance is provided in the inner ring 15 (see FIG. 1).

  Next, main components of the lever side clutch part 11 and the brake side clutch part 12 in the clutch unit X will be described in detail.

  FIGS. 6A and 6B show the lever side plate 13 of the lever side clutch portion 11. The lever side plate 13 has a hole 13a through which the output shaft 22 and the inner ring 15 are inserted at a central portion thereof, and a plurality of (for example, five) claw portions 13b project from the outer peripheral edge. These claw portions 13b are bent in the axial direction to have a bifurcated tip, and are inserted into a notch recess 14e (see FIG. 7C) of the lever side outer ring 14 to be described later. By expanding outward, the lever side plate 13 is fixed by crimping to the lever side outer ring 14. In addition, the code | symbol 13c in a figure is the several (for example, four) hole for attaching the operation lever for operating the height adjustment of a seat to the lever side side board 13. FIG.

  FIGS. 7A to 7C show the lever-side outer ring 14. The lever-side outer ring 14 is formed by pressing a single plate-shaped material into a cup shape, and a hole 14b through which the output shaft 22 and the inner ring 15 are inserted is formed in the center part 14c. A plurality of cam surfaces 14a are formed at equal intervals in the circumferential direction on the inner periphery of the cylindrical portion 14d extending in the axial direction (see FIG. 4).

  A plurality of (for example, three) claw portions 14f and 14g project from the outer peripheral edge portion of the lever-side outer ring 14 and are bent in the axial direction. Of these claw portions 14f and 14g, one claw portion 14f is inserted and disposed between two locking portions 19a (see FIG. 12) of an outer centering spring 19 to be described later, and the remaining two claw portions 14g. Is a pair of engagements as rotation stoppers provided on the outer periphery of the cover 24 by sliding on the end surface of the brake side outer ring 23 by the rotation of the lever side outer ring 14 in contact with the end surface of the brake side outer ring 23 described later. The operation angle of the operation lever is regulated by moving between the stop portions 24e and 24f (see FIG. 16B) and making contact with each of the locking portions 24e and 24f at the moving ends in the rotation direction. I am doing so.

  On the outer periphery of the lever-side outer ring 14, a plurality of (five in the figure) notch recesses 14e into which the claw portions 13b of the lever-side side plate 13 (see FIGS. 6A and 6B) are inserted are formed. The lever side plate 13 and the lever side outer ring 14 are connected by crimping the claw portion 13b of the lever side plate 13 inserted into the notch recess 14e. The lever side outer ring 14 and the lever side plate 13 fixed by crimping to the lever side outer ring 14 constitute an input side member of the lever side clutch portion 11.

  FIGS. 8A and 8B show the inner ring 15. The inner ring 15 includes an outer peripheral surface 15a that forms a wedge clearance 20 (see FIG. 4) between the outer diameter of the cylindrical portion 15b through which the output shaft 22 is inserted and the cam surface 14a of the lever-side outer ring 14. . Further, an enlarged diameter portion 15c extending radially outward from the end of the cylindrical portion 15b and bent in the axial direction is integrally formed, and the enlarged diameter portion 15c functions as a cage for the brake side clutch portion 12. Therefore, pockets 15e for accommodating the cylindrical rollers 27 and the projections 29b of the friction ring 29 are formed at equal intervals in the circumferential direction. In addition, the code | symbol 15d in a figure is a hole into which the protrusion 22f (refer FIG. 1) of the output shaft 22 is inserted with a clearance.

  9 and 10 (a) to 10 (c) show a cage 17 made of resin. The cage 17 is a cylindrical member in which a plurality of pockets 17a for accommodating the cylindrical rollers 16 are formed at equal intervals in the circumferential direction. Two notch recesses 17b are formed at one end of the retainer 17, and a locking part 18a of an inner centering spring 18 (described later) is locked to two adjacent end surfaces 17c of each notch recess 17b. (See FIG. 22).

  FIG. 11 shows the inner centering spring 18. The inner centering spring 18 is composed of a C-shaped spring member having a circular cross section having a pair of engaging portions 18a bent radially inward, and is located on the inner diameter side of the outer centering spring 19 (see FIG. 22). The inner centering spring 18 is disposed between the cage 17 and a cover 24 that is a stationary side member of the brake side clutch portion 12, and both locking portions 18 a are two end surfaces 17 c of the cage 17 (see FIG. 9 and FIG. 9). 10 (see FIG. 10 (b)) and is latched on the claw portion 24 b (see FIGS. 16 (a) and (b)) provided on the cover 24 (see FIGS. 22 and 23 (a) and (b)). )reference〕.

  In the inner centering spring 18, when the input torque from the lever side outer ring 14 is applied, one locking portion 18 a is on one end surface 17 c of the cage 17, and the other locking portion 18 a is on the claw portion 24 b of the cover 24. As the lever-side outer ring 14 rotates, the inner centering spring 18 is pushed and expanded to accumulate elastic force. When the input torque from the lever-side outer ring 14 is released, the elastic restoring force causes the cage 17 to move. Is returned to the neutral state.

  FIG. 12 shows the outer centering spring 19. The outer centering spring 19 is a strip-shaped spring member having a C-shape and having a pair of locking portions 19a whose both ends are bent radially outward, and is located on the outer diameter side of the inner centering spring 18 ( (See FIG. 22). The outer centering spring 19 is disposed between the lever-side outer ring 14 of the lever-side clutch portion 11 and the cover 24 of the brake-side clutch portion 12, and both locking portions 19 a are claw portions 14 f provided on the lever-side outer ring 14. [FIGS. 7A to 7C] and is locked to a claw portion 24d [see FIGS. 16A and 16B] provided on the cover 24 [FIG. 23A]. (See (b)). The locking portion 19a is arranged with a circumferential phase (180 °) shifted from the locking portion 18a of the inner centering spring 18 (see FIG. 22).

  In the outer centering spring 19, when the lever side outer plate 14 is rotated by the lever operation by the lever operation and the lever side outer ring 14 rotates, one locking portion 19 a is engaged with the claw portion 14 f of the lever side outer ring 14 and the other engagement. Since the stop portions 19a are respectively engaged with the claw portions 24d of the cover 24, the outer centering spring 19 is pushed and expanded with the rotation of the lever side outer ring 14, and the elastic force is accumulated, and the input torque from the lever side outer ring 14 is increased. When opened, the lever-side outer ring 14 is returned to the neutral state by the elastic restoring force.

  FIGS. 13A and 13B and FIGS. 14A to 14C show the output shaft 22. The output shaft 22 has a large-diameter portion 22d that extends radially outward from the shaft portion 22c and is integrally formed at a substantially central portion in the axial direction. A pinion gear 41g for connecting to the seat lifter 41 [see FIGS. 25 and 26 (a) and 26 (b)] is coaxially formed at the tip of the shaft 22c.

  A plurality of (for example, six) flat cam surfaces 22a are formed on the outer peripheral surface of the large-diameter portion 22d at equal intervals in the circumferential direction, and a wedge clearance 26 provided between the inner peripheral surface 23b of the brake-side outer ring 23 and the like. Two cylindrical rollers 27 and protrusions 29b of the friction ring 29 are arranged on each (see FIG. 5). An annular recess 22b in which the ring portion 29a of the friction ring 29 is accommodated is formed on one end face of the large diameter portion 22d. Reference numeral 22f in the figure is a protrusion formed on the other end face of the large-diameter portion 22d, and is inserted into the hole 15d of the inner ring 15 with a clearance (see FIGS. 1 and 8A and 8B). Reference numeral 22g denotes a notch formed in the central portion of the cam surface 22a of the large diameter portion 22d, and the root portion of the protrusion 29b of the friction ring 29 is inserted and disposed (see FIG. 5).

  FIGS. 15A and 15B and FIGS. 16A and 16B show the brake-side outer ring 23 and its cover 24. 17A and 17B show the brake side plate 25. FIG. The brake side outer ring 23 and the cover 24 are caulked and fixed integrally by the brake side plate 25. The brake-side outer ring 23 is a thick plate-like member obtained by punching one material with a press, and the cover 24 is formed by pressing another material with a press. In the figure, reference numeral 24c denotes a hole through which the output shaft 22 is inserted, and reference numeral 25c denotes a hole 25b through which the output shaft 22 is inserted so as to project in the axial direction so as to surround the hole 25b. It is a cylindrical part.

  A plurality (three) of cutout recesses 23a are formed on the outer periphery of the brake side outer ring 23, and a plurality (three) of cutout recesses 24a are also formed on the outer periphery of the cover 24 so as to correspond to the cutout recesses 23a. Is formed. 19 (a) and 19 (b), the claw portion 25a of the brake side plate 25 is inserted into the notch recess 23a of the brake side outer ring 23, and the notch recess 24a of the cover 24 is inserted into the notch recess 24a of the cover 24 as shown in FIG. The claw portion 25a of the brake side plate 25 is inserted.

By tightening the claw portions 25a of the brake side plate 25 inserted into the notches 23a and 24a, the brake side outer ring 23 and the cover 24 are connected and integrated with the brake side plate 25 to constitute a stationary member. Crimp claw portion 25a of the brake-side side plate 25, by utilizing crimping jig (not shown), it is carried out by expanding the bifurcated distal end portion 25a ₁ of the claw portion 25a to the outside (See FIG. 21).

  A wedge clearance 26 is formed between the inner peripheral surface 23b of the brake-side outer ring 23 and the cam surface 22a of the output shaft 22 (see FIG. 5). The cover 24 is formed with a claw portion 24b protruding in the axial direction, and the claw portion 24b is disposed between the two locking portions 18a of the inner centering spring 18 of the lever side clutch portion 11 [FIGS. 11 and 23]. (See (a) and (b)). The claw part 24b of the cover 24 is formed by raising the outer diameter side of the claw part forming position. A claw portion 24 d that protrudes in the axial direction is formed on the outer periphery of the cover 24. The claw portion 24d is disposed between the two engaging portions 19a of the outer centering spring 19 of the lever side clutch portion 11 (see FIGS. 12 and 23 (a) and 23 (b)).

  Two sets of locking portions 24e and 24f are formed on the outer periphery of the cover 24 by a stepped process (see FIGS. 23A and 23B). The engaging portions 24e and 24f can be contacted in the rotation direction when the claw portion 14g of the lever-side outer ring 14 rotates in a state of being in contact with the end surface of the brake-side outer ring 23, whereby the operating angle of the operating lever It functions as a rotation stopper that regulates That is, when the lever side outer ring 14 is rotated by the operation of the operation lever, the claw portion 14g moves along the outer periphery of the cover 24 between the locking portions 24e and 24f of the cover 24.

  On the outer periphery of the brake side plate 25, one flange portion 25e and two flange portions 25f are provided as clutch attachment portions to the seat lifter portion (see FIGS. 2 to 4). At the tips of these three flange portions 25e and 25f, holes 25g and 25h for attachment to the seat lifter portion are bored so that the cylindrical portions 25i and 25j are axially bent so as to surround the attachment holes 25g and 25h. Projected.

  18A and 18B show a resin friction ring 29. FIG. The friction ring 29 is disposed on the inner side of the output shaft 22, and is integrated with a ring portion 29a that imparts rotational resistance by frictional force generated between the brake side plate 25 and a plurality of locations on the outer periphery of the ring portion 29a. And a projection 29b disposed between each pair of cylindrical rollers 27 via a notch 22g of the large-diameter portion 22d of the output shaft 22 and energizing a separating force to the paired cylindrical rollers 27. (See FIGS. 1 and 5). A protrusion 29b extending from the ring portion 29a of the friction ring 29 is inserted into a notch 22g formed in the large-diameter portion 22d of the output shaft 22 (FIGS. 13A and 13B). 14 (a) to (c) and FIG. 24].

  The friction ring 29 in this embodiment has a structure in which a conventional friction ring 129 and a leaf spring 128 (see FIG. 29) are functionally integrated. As a result, the conventional friction ring 129 and the leaf spring 128 require two components, whereas the conventional friction ring 129 and the leaf spring 128 have both the ring portion 29a and the protrusion 29b. The friction ring 29, which is a single component, can be used to reduce the number of components and simplify the assembly.

  The ring portion 29 a of the friction ring 29 has a structure that rotates together with the output shaft 22 because the projection 29 b is inserted into the notch 22 g of the large diameter portion 22 d of the output shaft 22. Since such a structure is employed, the inner peripheral surface 29c of the ring portion 29a is a sliding surface with the outer peripheral surface 25d of the cylindrical portion 25c of the brake side plate 25 [FIGS. 1, 5, and 17]. (See (a)). During clutch operation, rotational resistance is applied to the output shaft 22 by frictional force generated by sliding of the inner peripheral surface 29c of the ring portion 29a with respect to the outer peripheral surface 25d of the cylindrical portion 25c of the brake side plate 25. This makes it easy to apply rotational resistance by the ring portion 29a.

  Further, by making the friction ring 29 made of resin, in the structure in which the ring portion 29a and the projection portion 29b are integrated, a ring that imparts rotational resistance to the output shaft 22 by frictional force generated between the brake side plate 25 and the ring. Both the function of the part 29a and the function of the protruding part 29b for urging the separating force to the pair of cylindrical rollers 27 can be easily exhibited. The friction ring 29 may be made of rubber.

  The operation of the lever side clutch portion 11 and the brake side clutch portion 12 in the clutch unit X having the above configuration will be described.

  In the lever side clutch portion 11, when an input torque acts on the lever side outer ring 14, the cylindrical roller 16 engages with a wedge clearance 20 between the lever side outer ring 14 and the inner ring 15, and the inner ring 15 is engaged via the cylindrical roller 16. Torque is transmitted and the inner ring 15 rotates. At this time, an elastic force is accumulated in the centering springs 18 and 19 as the lever-side outer ring 14 and the cage 17 rotate. When the input torque is lost, the lever-side outer ring 14 and the cage 17 are returned to the neutral state by the elastic force of the centering springs 18 and 19, while the inner ring 15 maintains the given rotational position. Therefore, the inner ring 15 rotates in a jog by repeating the rotation of the lever side outer ring 14, that is, by the pumping operation of the operation lever.

  In the brake side clutch portion 12, when reverse input torque is input to the output shaft 22, the projections 29 b of the friction ring 29 urge the pair of cylindrical rollers 27, thereby causing the cylindrical rollers 27 to output the force. The output shaft 22 is locked to the brake side outer ring 23 by engaging with the wedge clearance 26 between the shaft 22 and the brake side outer ring 23. Accordingly, the reverse input torque from the output shaft 22 is locked by the brake side clutch portion 12 and the return of the reverse input torque to the lever side clutch portion 11 is interrupted.

  On the other hand, the input torque from the lever side outer ring 14 is input to the inner ring 15 via the lever side clutch portion 11, and the inner ring 15 comes into contact with the cylindrical roller 27 and presses against the elastic force of the projection 29 b of the friction ring 29. By doing so, the cylindrical roller 27 is detached from the wedge clearance 26, the locked state of the output shaft 22 is released, and the output shaft 22 becomes rotatable. When the inner ring 15 further rotates, the clearance between the hole 15d of the inner ring 15 and the protrusion 22f of the output shaft 22 is clogged, and the inner ring 15 comes into contact with the protrusion 22f of the output shaft 22 in the rotation direction, so that the input torque from the inner ring 15 is increased. The output shaft 22 is transmitted to the output shaft 22 through the protrusion 22f, and the output shaft 22 rotates.

  The clutch unit X having the structure described in detail above is used by being incorporated in, for example, an automobile seat lifter. FIG. 25 shows a seat seat 40 installed in a passenger compartment of an automobile. The seat 40 includes a seat 40a and a backrest 40b, and includes a seat lifter 41 that adjusts the height H of the seat 40a. The height H of the seating seat 40a is adjusted by the operation lever 41a of the seat lifter 41.

FIG. 26A conceptually shows one structural example of the sheet lifter unit 41. Seat slide adjuster 41b of the slide moving member 41b ₁ to the link member 41c, one end of 41d are respectively rotatably hinged. The other ends of the link members 41c and 41d are pivotally attached to the seating seat 40a. The other end of the link member 41c is pivotally attached to the sector gear 41f via the link member 41e. Sector gear 41f is pivotally rotatably sitting seat 40a, a swingable fulcrum 41f ₁ around. The other end of the link member 41d is pivotally attached to the seating seat 40a.

  The clutch unit X of the above-described embodiment is fixed to an appropriate part of the seating seat 40a. The clutch unit X is fixed to the seating seat 40a by plastically deforming the three flange portions 25e and 25f of the brake side plate 25 so that the distal end portions of the cylindrical portions 25i and 25j are expanded outward. It is fixed by caulking to a seat frame (not shown) of the seat 40a.

  On the other hand, an operation lever 41a is coupled to the lever side plate 13 of the lever side clutch portion 11, and an output shaft 22 of the brake side clutch portion 12 is provided with a pinion gear 41g that meshes with a sector gear 41f that is a rotating member. The pinion gear 41g is integrally formed at the tip of the shaft portion 22c of the output shaft 22 as shown in FIGS. 1, 13A, 13B, and 14A, 14B.

  In FIG. 26B, when the operation lever 41a is swung counterclockwise (upward), the input torque in that direction is transmitted to the pinion gear 41g via the clutch unit X, and the pinion gear 41g rotates counterclockwise. To do. Then, the sector gear 41f that meshes with the pinion gear 41g swings in the clockwise direction, and pulls the other end of the link member 41c through the link member 41e. As a result, both the link member 41c and the link member 41d stand up, and the seating surface of the seating seat 40a is raised.

  In this way, after adjusting the height H of the seating seat 40a, when the operation lever 41a is opened, the operation lever 41a is rotated clockwise by the elastic force of the two centering springs 18 and 19 to return to the original position ( Return to the neutral state. When the operation lever 41a is swung clockwise (downward), the seating surface of the seating seat 40a is lowered by the reverse operation. When the operation lever 41a is released after the height adjustment, the operation lever 41a rotates counterclockwise and returns to the original position (neutral state).

  The present invention is not limited to the above-described embodiments, and can of course be implemented in various forms without departing from the gist of the present invention. It includes the equivalent meanings recited in the claims and the equivalents recited in the claims, and all modifications within the scope.

11 Lever side clutch part 12 Brake side clutch part 13 Input side member (lever side side plate)
14 Input side member (lever side outer ring)
15 Connecting member (inner ring)
16 Engagement element (cylindrical roller)
17 Cage 18 First elastic member (inner centering spring)
19 Second elastic member (outer centering spring)
22 Output side member (output shaft)
22g Notch 23 Stationary side member (brake side outer ring)
24 Static side member (cover)
25 Static side member (brake side plate)
26 Wedge clearance 27 Engagement element (cylindrical roller)
29a Friction part (ring part)
29b Elastic part (protrusion part)
29c Inner peripheral surface

Claims (8)

Provided on the input side, lever side clutch part that controls transmission / cutoff of rotational torque to the output side by lever operation, and provided on the output side, and transmits input torque from the lever side clutch part to the output side It consists of a brake side clutch that cuts off the reverse input torque from the output side,
The brake side clutch part is disposed outside the output side member that outputs torque, a stationary side member that is constrained to rotate, and disposed inside the output side member, It is arranged in the friction part that gives rotational resistance by the friction force generated between the stationary member and the wedge clearance between the stationary member and the output member, and the input torque is transmitted by engagement / disengagement between both members. A plurality of pairs of engagement elements that control the blocking of the reverse input torque, and an elastic part that is disposed between each pair of engagement elements and biases a separating force against the pair of engagement elements, A clutch unit characterized by integrating an elastic part.   The clutch unit according to claim 1, wherein a notch portion is formed in the output side member, and an elastic portion extending from the friction portion is inserted into the notch portion.   The clutch unit according to claim 1, wherein the friction portion has a ring shape and has an inner peripheral surface that slides with respect to the stationary side member.   The clutch unit according to any one of claims 1 to 3, wherein the friction part and the elastic part are made of resin.   The lever side clutch portion includes an input side member to which torque is input by lever operation, a connecting member that transmits torque from the input side member to the brake side clutch portion, and engagement between the input side member and the connecting member. A plurality of engagement elements that control transmission / cutoff of input torque from the input side member by detachment, a retainer that holds the engagement elements at predetermined intervals in the circumferential direction, and a stationary side member that is restricted in rotation, A first is provided between the cage and the stationary side member, accumulates an elastic force with an input torque from the input side member, and returns the cage to a neutral state with the accumulated elastic force by releasing the input torque. The elastic member is provided between the input side member and the stationary side member, and an elastic force is accumulated by an input torque from the input side member. By releasing the input torque, the input side member is moved by the accumulated elastic force. Return to neutral Clutch unit according to any one of claims 1-4 and a second elastic member.   The clutch unit according to claim 1 or 5, wherein at least one of the engaging member of the lever side clutch portion or the engaging member of the brake side clutch portion is a cylindrical roller.   The clutch unit as described in any one of Claims 1-6 in which the said lever side clutch part and the brake side clutch part are integrated in the seat lifter part for motor vehicles.   The clutch unit according to claim 7, wherein an input side member of the lever side clutch portion is coupled to a lever, and an output side member of the brake side clutch portion is connected to a link mechanism of an automobile seat lifter portion.

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