KR100654924B1 - Safety switching device for handling one way clutch possible of changing in bidirection - Google Patents

Abstract

A one-way clutch operating type safety switch capable of changing the direction is provided to safely convert power transmitting direction of a one-way clutch in a state that a driving wheel is completely stopped and constrained. A one-way clutch operating type safety switch(100) comprises a direction changing lever(110) formed with a handle(111) on the upper end pivot-supported by a chassis(F) and connected with an operating cover on the lower end; a brake disc(120) fixed on a driven shaft; a hydraulic caliper(130) selectively holding the brake disc to constrain or release the brake disc; a hand brake lever(140) connected with the hydraulic caliper by a cable(141) and pivot-mounted on the direction changing lever to be moved away or toward the handle so as to operate the hydraulic caliper; and a guide plate(150) formed with a shift range slot(151) having a shift unit(152) allowing movement of the direction changing lever by the brake disc by pulling the hand brake lever only in a state that the direction changing lever is constrained by the hydraulic caliper, and a position fixing unit(153,154) curved/elongated in the same direction from both ends of the shift unit to allow release of the hand brake lever so as to prevent the direction changing lever from being moved.

Description

Safety switching device for handling one way clutch possible of changing in bidirection}

1 is an exploded perspective view showing a reversible one-way clutch pre- filed by the present applicant,

Figure 2 is a cross-sectional view of the coupled state of FIG.

3 is a cross-sectional view taken along line III-III of FIG. 2;

Figure 4 is an excerpt side view schematically showing an example of the use of the switchable one-way clutch;

Figure 5 is a perspective view showing a safety switch device for directional switchable clutch operation according to the present invention,

6 is a front view taken along VI in FIG. 5;

7a and 7b is a plan view and a side view of the excerpt schematically showing the operation of the safety switch device of the present invention;

Figure 8 is a perspective view of the main portion extract showing another embodiment of the safety switch device of the present invention,

9 is a plan view showing an operating state of the play plate of the safety switch device of the present invention.

<Description of Symbols for Main Parts of Drawings>

  1: switchable one-way clutch 10: outer sleeve

 20: inner sleeve 30: ratchet plate

 40: switching block 50: operation cover

110: direction change lever 111: handle

112: pivot 120: brake disc

130: hydraulic caliper 140: hand brake lever

141: cable 150: guide plate

151: shift range slot 152: shift portion

153, 154: Position fixing 155: Hanging groove

160: clearance control plate 161: long hole

162: locking groove 163: adjusting bolt

S: driven shaft Pc: crank pedal

C: chain

The present invention provides a power transmission direction such that the power is transmitted only in one of the forward and reverse directions to the driven shaft in accordance with the rotation direction of the driving source in a driving apparatus having the same rotational direction as the driving shaft and the chain transmission or the belt transmission. The present invention relates to a switchable one way clutch, and more particularly, to a power transmission direction of one clutch only when the driving wheel is restrained in a completely stopped state when switching the power transmission direction. The present invention relates to a safety switch device for a directional switchable one-clutch operation that can be safely switched.

As is well known, the one-way clutch is a device that transmits the power of the drive shaft to the driven shaft in one direction only, such as a chain drive or belt drive, in which the drive shaft and the driven shaft are driven in the same direction. In addition, it is widely used in various devices that do not need to change the driving direction.

On the other hand, for example, US Patent No. 1,254,434 proposes a manpower car that runs on a railroad by a crank pedal system using a chain. In this case, although a reverse drive is required, the conventional one-clutch cannot change the power transmission direction. If backward travel is required, there is a problem that the vehicle is forced to change direction by pushing back or lifting the device itself.

Accordingly, the present applicant has filed the Korean patent application No. 10-2005-0018271 for the so-called "switchable one-way clutch device" which can switch the driven shaft in the forward or reverse direction according to the rotation direction of the driving source.

1 to 4, the outer sleeve 10 is connected to the chain sprocket Sc and the chain C of the crank pedal Pc by having the chain sprocket 14 at one end thereof, The driven shaft S equipped with the driving wheel W is fitted and fixed, and the inner sleeve 20 having a plurality of engaging protrusions 21 at a predetermined angle interval on a part of the outer circumference, and mounted on the outer sleeve 10 to the inside A pair of ratchet plates 30 which selectively engage the both sides of the engaging protrusion 21 of the sleeve 20 to allow the outer and inner sleeves 10 and 20 to be rotated in only one of the forward and reverse directions. In accordance with the power transmission direction, only one of the two ratchet plates 30 in contact with the engaging projection 21 of the inner sleeve 20 to operate the switching block 40 and the switching block 40 to switch the power transmission direction. It consists of an operation cover 50.

Guide slots 11 for mounting the switching block 40 are formed on the main surface of the outer sleeve 10, and both ratchet plates 30 are supported on both sides of the guide slot 11 so as to be capable of lever movement. Has a seating groove 12 for inclined. The inner sleeve 20 is coupled to the inner circumference of the outer sleeve 10 via a bearing 60.

Each ratchet plate 30 is provided with protruding tabs 31 on both sides of one end so as to face the seating grooves 12 of the outer sleeve 10 so as to be positioned on both sides of the locking protrusion 21. The switching block 40 is mounted on the two ratchet plates 30 with the leaf spring 41 of approximately reverse V type on the lower surface thereof, and the cover plate 70 fastened to the outer sleeve 10 with the through slot 71. It is supported by the guide slot 11 so as to be movable in the axial direction.

The operation cover 50 has a guide channel 51 in which the switching block 40 is accommodated, and is coupled to surround the outer sleeve 10.

Therefore, in order to apply such a switchable one-way clutch to the above-mentioned gravitation vehicle, it must be provided with a direction switching means for changing the power transmission direction from the outside. In particular, since the direction change means may be a great threat not only to the device but also to the occupant when operating while driving due to the structural characteristics of the manpower vehicle, it is required to be able to safely switch the power transmission direction in a completely stopped state.

It is an object of the present invention to transmit power such that power is transmitted only in one of the forward and reverse directions to a driven shaft in accordance with the rotational direction of the driving source in a drive device in which the rotational directions of the driving shaft and the driven shaft are the same as those of chain transmission or belt transmission. When switching the power transmission direction of the switchable one-way clutch that changes the direction, the safety of the switchable one-way clutch that can safely change the power transmission direction of the one-way clutch only when the driving wheel is restrained in a completely stopped state. In providing a switch device.

In order to achieve the above object, the safety switch device for directional switchable clutch operation according to the present invention includes an external sleeve having a guide slot on a main surface thereof and connected to a shaft of a driving source and a power transmission means, and an outer periphery corresponding to the guide slot. An inner sleeve fixed to a driven shaft mounted with a driving wheel rotatably coupled to an outer sleeve with a plurality of locking projections radially to the pair, and a pair of ratchet plates supported at both ends of the guide slots so as to be lever-movable; A direction including an operating cover for moving the switching block is coupled to surround the switching block and the outer sleeve to alternately position each ratchet plate between the engaging projection and the two circumferential sides of the guide slot while moving in the axial direction in the guide slot As a safety switch device for operating the switchable one-clutch from the outside,

A pivot lever supported on a chassis with a handle at the top and connected to an operation cover of a one-way clutch whose bottom is reversible; A brake disc fixed to a driven shaft on which a drive wheel is mounted; A hydraulic caliper for selectively holding and restraining or releasing the brake disc; A hand brake lever connected to the hydraulic caliper and a cable and pivotally mounted to the direction switching lever to operate the hydraulic caliper by moving toward or away from the handle; The hand brake lever is pulled so that the brake disc is allowed to move only when the brake disc is restrained by the hydraulic caliper, and the bending part extends in the same direction at both ends of the shift part to allow the release of the hand brake lever. And a guide plate having a shift range slot made of a position fixing part for preventing the movement of the turning lever.

According to one preferred feature of the present invention, the shift range slot of the guide plate is formed in a quadrangular shape, and a play plate having a position adjustment hole in the operating direction of the hand brake lever is fastened to one side of the guide plate to shift the shift range slot. It is configured to adjust the width of the shifting part by dividing it into a part and a position fixing part.

Accordingly, the present invention is mounted on the same device as the rotational direction of the driving shaft and the driven shaft, such as a chain or belt transmission, and can be switched to transfer the power in one direction of the positive or reverse direction to the driven shaft in accordance with the rotation direction of the drive source When switching the power transmission direction of the one-clutch, it is possible to operate the direction switching lever only in a state in which the hand brake lever is pulled and restrained so that the driving wheel is completely stopped.

Therefore, the present invention has a great effect on improving the reliability, safety and ease of use of a device equipped with a switchable one-way clutch, in particular, a manpower driven vehicle such as a rail bike.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the switchable safety switch device for one-clutch operation according to the present invention in detail, the parts not shown will be described with reference to Figs.

As shown in Fig. 5 and Fig. 7, the safety switch device 100 for directional switchable clutch operation according to the present invention is, for example, an axle S of an gravitation vehicle (not shown) such as a rail bike. Direction change lever 110 for switching the power transmission direction of the switchable one-way clutch 1 mounted in the forward or reverse direction, the brake disc 120, and for restraining the rotation of the brake disc 120. Hydraulic caliper 130, and a hand brake lever 140 for operating the hydraulic caliper 130, and a guide plate 150 for guiding and controlling the operation of the direction switching lever 110 and the hand brake lever 140 do.

The turning lever 110 is pivotally mounted to the chassis F of the rickshaw by a pivot 112, and the operation cover 50 of the turnable one-clutch 1 whose lower end is mounted to the axle S is rotated. It is fastened to the outer circumference with the bolt 13. This reversing lever 110 preferably has a handle 111 for its convenience on top.

The brake disc 120 is integrally fixed to the axle S equipped with driving wheels W at both ends thereof and rotates together with the axle S. The hydraulic caliper 130 surrounds a part of the brake disc 120. To the chassis (F).

The hand brake lever 140 is hinged to the upper end of the turning lever 110 and is elastically biased away from the handle 111 so as to approach or move away from the handle 111. The hydraulic caliper 130 is selectively operated by being connected by the caliper 130 and the cable 141.

Guide plate 150 is installed in the chassis (F) to guide the correct operation of the direction switching lever 110 and the hand brake lever 140, the hand brake lever is provided with a shift range slot 151 to be inserted and moved The control unit 140 controls the turning lever 110 to rotate only when the brake disk 120 is restrained by pulling 140.

The shift range slot 151 is a shift unit 152 allowing the left and right movement of the direction switching lever 110 only while the hand brake lever 140 is pulled, and bent in the same direction at both ends of the shift unit 152. It has an approximately U-shape with two position fixing parts 153 and 154 extending to allow movement of the turning lever 110 while allowing the release of the hand brake lever 140.

The shift unit 152 is preferably provided with a locking groove 155 for fixing the position of the hand brake lever 140 in a pulled state.

Next, the operation of the switchable safety switch device 100 for one-clutch operation according to the present invention configured as described above will be described with reference to FIGS.

7A and 7B, the hand brake lever 140 is pulled toward the handle 111 of the turning lever 110 to engage the locking groove 155 in the shift portion 152 of the guide plate 150. Position is fixed by. At this time, the hydraulic caliper 130 is operated by the hand brake lever 140 to hold the brake disc 120 so that the axle S is completely stopped.

In this state, when the power is to be transmitted in the forward direction (forward direction), while simultaneously holding the handle 111 and the hand brake lever 140 and pulling the hand brake lever 140 as shown in the phantom line, both are shown. It moves to the left in the figure (Fig. 7B).

Then, as shown in the phantom line in Figure 6, the direction turning lever 110 is rotated around the pivot 112 to move the operation cover 50 of the one-way clutch (1) that can be turned to the right in the drawing.

Accordingly, the switching block 40 is moved at the same time so that the leaf spring 41 is rotated upward by pressing the upper surface of the fixed end (supporting end) side of one ratchet plate 30, while the other ratchet plate 30 Press the free end of the upper surface is positioned between the guide protrusion 11 of the outer projection 10 and the engaging projection 21 of the inner sleeve (20).

Subsequently, the restraint of the hand brake lever 140 held is released. Then, the hand brake lever 140 is positioned in the unfolded position on the left position fixing portion 153 of the U-type shift range slot 151 by its restorative elasticity, and thus the brake disc 120 is released to release the axle ( S) becomes rotatable.

At this time, the direction switching lever 110 is located in a state in which the hand brake lever 140 integrally configured is caught in one position fixing part 153 of the U-type shift range slot 151 so that movement in the opposite direction is impossible. It is fixed, and thus the direction change is impossible in the state in which the axle S rotates.

In such a state, for example, when the crank pedal Pc is rotated in the forward direction, the outer sleeve 10 of the one-way clutch 1 which can be turned by the chain C is rotated in the same direction, and thus one ratchet plate ( As the inner sleeve 20 caught in 30 rotates together in the forward direction, the axle S fixed to the inner sleeve 20 rotates together.

On the other hand, in the case of driving in this way to change the driving direction pulls the hand brake lever 140 in the extended position on the left position fixing portion 153 of the shift range slot 151 toward the handle 111. Then, the hydraulic caliper 130 is operated by the cable 141 to grab and restrain the brake disc 120 so that the axle S stops.

Subsequently, the hand brake lever 140 is completely pulled and moved to the right end of the shift range slot 151 as shown by the dotted line with the handle 111. Then, as shown by the dotted line in Figure 6, the direction switching lever 110 is rotated in the opposite direction to slide the operation cover 50 of the switchable one-way clutch (1) to the opposite side.

As a result, the switching block 40 is moved to the opposite side, so that the position of the two ratchet plates 30 is changed, unlike when moving forward, so that the power transmission direction is reversed (reverse direction).

Subsequently, when releasing the restraint of the hand brake lever 140, the hand brake lever 140 is positioned in an unfolded state on the right position fixing part 154, so that the turning lever 110 cannot be rotated, and the hydraulic caliper 130 releases the restraint of the brake disc 120 so that the axle S becomes rotatable.

In this state, when the crank pedal Pc is rotated in the reverse direction, the axle S rotates as opposed to when it is advanced.

8 and 9 show main parts of another embodiment according to the present invention.

In this embodiment, in the configuration of the above-described embodiment, the shift range slot 151 of the guide plate 150 is formed in a quadrangle, and for adjusting the position in the operation direction of the hand brake lever 140 on one upper surface of the guide plate 150. The clearance adjusting plate 160 having the long hole 161 is fastened by the adjusting bolt 163 to define the shift unit 152 and the two position fixing parts 153 and 154. In this case, the locking groove 162 to which the hand brake lever 140 is fitted is formed at the tip of the play plate 160.

Embodiments of such a configuration include brake discs when the vehicle body is kept stationary, such as parking or stopping, by appropriately adjusting the relative fixing position of the play plate 160 relative to the guide plate 150 according to the non-constant hydraulic play. Fully hold 120 to allow for a safe stop.

As described above, according to the switchable safety switch device for one-way clutch operation according to the present invention, like the chain or belt transmission, the rotational direction of the driven shaft and the driven shaft is mounted on the same device and driven according to the rotational direction of the drive source. When switching the power transmission direction of the switchable one-clutch which transmits power only in one direction in the forward or reverse direction, the steering lever can be operated only when the hand brake lever is pulled and restrained so that the driving wheel is completely stopped. Therefore, the power transmission direction of one clutch can be changed very safely.

In addition, a separate braking device can be eliminated in a device employing a switchable one-way clutch, for example, a manpower car such as a rail bike.

Therefore, the present invention has a very excellent effect that greatly contributes to the improvement of the reliability and safety and ease of use of the device equipped with a switchable one-way clutch, in particular a rail bike.

Claims (4)

An external sleeve having a guide slot on the main surface and connected to the shaft and the power transmission means of the driving source, and having a plurality of engaging projections radially on the outer periphery corresponding to the guide slot, and rotatably coupled to the external sleeve to mount the driving wheel. An inner sleeve fixed to the coaxial shaft, a pair of ratchet plates supported on both ends of the guide slots so as to be lever-movable, and two ratchet plates circumferentially facing each ratchet plate while moving axially from the guide slots. A safety switch device for manipulating an externally switchable one-way clutch including an operation cover coupled to surround a switching block and an outer sleeve alternately positioned between sides and moving the switching block, A pivot lever supported at the chassis with a handle at the top, and having a bottom connected to the operation cover; A brake disc fixed to the driven shaft; A hydraulic caliper for selectively holding and restraining the brake disc; A hand brake lever connected to the hydraulic caliper by a cable and pivotally mounted to the turning lever to operate the hydraulic caliper by moving toward or away from the handle; A shift portion allowing the hand brake lever to be pulled to allow the shifting lever to move only when the brake disc is restrained by the hydraulic caliper, and bent in the same direction at both ends of the shift portion to release the restraint of the hand brake lever; And a guide plate having a shift range slot made of a position fixing part which prevents the movement of the direction switching lever. 2. The safety switch device of claim 1, wherein a locking groove is formed in which the hand brake lever is inserted and fixed in the shift range slot shift portion of the guide plate. According to claim 1, wherein the shift range slot of the guide plate is formed in a rectangular shape, the play plate having a position adjusting hole in the operating direction of the hand brake lever is fastened to one side of the guide plate, the shift range slot is shifted Safety switch device for directional one-way clutch operation, characterized in that it is possible to adjust the width of the shift portion and partitioned by the position fixing. 4. The safety switch device of claim 3, wherein a locking groove is formed at a front end of the play adjusting plate in a state where the hand brake lever is pulled in and is fixed.

Images