JPH0130010B2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Purpose of the Invention [Field of Industrial Application] The present invention provides a system for transmitting power to the driven side of a forward/reverse driving shaft to a system that transmits only forward rotation power to the driven side. This invention relates to a forward and reverse transmission transmission clutch that is separated into a system that transmits only reverse power to the driven side and a system that transmits only reverse power to the driven side.

[Conventional technology]

The power transmission to the driven side of the conventional forward/reverse driving shaft is as follows:
This was done with only one system using a transmission wheel that was integrally fixed to the driving shaft.

[Problem that the invention seeks to solve]

In conventional technology, power is transmitted to the driven side of the forward and reverse driving shaft using only one system using a transmission wheel that is integrally fixed to the driving shaft. When transmitting the power of the driving shaft to each driven side that requires only reverse rotational power, it is necessary to provide a clutch on each driven side to cut off unnecessary rotational power.

(2) Structure of the Invention [Means for Solving Problems] The present invention comprises a boss fixed to a forward/reverse driving shaft having two flanges integrally disposed opposite to each other on the outer periphery of a longitudinally intermediate portion; a forward/reverse transmission switching pawl formed as a diversion engagement protrusion, the other end formed as a reversal engagement protrusion, and a central portion pivoted between the flanges of the boss to be swingable; and a longitudinal axis of the boss. At a predetermined interval along the outer circumferential wall of an annular recess formed on the side surface of the wheel body, an engagement member is formed on the side surface of the wheel body, with which the engagement protrusion for forward rotation of the switching pawl engages when the drive shaft rotatably mounted on the outer circumference of one direction rotates in the forward direction. a plurality of transmission wheels for forward rotation provided at the same distance, and a driving shaft rotatably mounted on the outer periphery of the other side in the longitudinal direction of the boss so as to sandwich the two flanges disposed opposite to the transmission wheels for forward rotation. A plurality of reversing transmission wheels are provided at predetermined intervals along the outer circumferential wall of an annular recess formed on the side surface of the wheel, and the engaging members that the reversing engaging protrusions of the switching pawl engage with during reversing are used to ensure correct rotation. The above-mentioned problem is solved by configuring a separate transmission clutch for reverse rotation and fixing the clutch to the forward and reverse rotation driving shaft.

[Effect]

When the forward/reverse driving shaft starts to rotate in the forward direction, the boss fixed to the drive shaft also starts to rotate in the forward direction. The reversing engagement protrusion at the other end of the forward/reverse transmission switching pawl, whose center portion is pivotally pivoted between the flanges of the The switching pawl is swung by contacting one of the plurality of engaging members provided along the outer peripheral wall of the annular recess formed on the side surface of the wheel body and being repelled in the axial direction. As a result of this rocking, the forward rotation engagement protrusion at one end of the switching pawl engages with the outer peripheral wall of the annular recess formed on the side surface of the forward rotation transmission wheel rotatably attached to the outer periphery of one longitudinal side of the boss. Since it engages with any one of the plurality of engagement parts formed by the plurality of engagement members provided along the outer circumferential wall, the rotational power of the drive shaft in the normal rotation direction is At the same time as the power is transmitted to the forward rotation transmission wheel, the power to the reverse rotation transmission wheel is cut off.

Contrary to the above, when the driving shaft starts rotating in the reverse direction, the boss fixed to the driving shaft also starts rotating in the reverse direction, and along with this rotation, the boss is integrally opposed to the outer periphery of the longitudinally intermediate part of the boss. The forward rotation engagement protrusion at one end of the forward/reverse transmission switching pawl, whose center portion is pivotably pivoted between the two flanges, is connected to the forward rotation transmission wheel, which is rotatably attached to the outer periphery of one longitudinal side of the boss. The switching pawl is swung by contacting any one of a plurality of engaging members provided along the outer circumferential wall of the annular recess formed on the side surface of the ring and being repelled in the axial direction. As a result of this rocking, the reversing engaging protrusion at the other end of the switching pawl engages the outer periphery of the annular recess formed on the side surface of the reversing transmission wheel rotatably attached to the outer periphery of the other longitudinal side of the boss. Since it engages with any one of the plurality of engagement parts formed by the wall and the plurality of engagement members provided along the outer circumferential wall, the rotational power of the driving shaft in the reverse direction is transmitted to the reverse rotation transmission wheel, and at the same time, the power to the forward rotation transmission wheel is cut off.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIGS. 1 and 2, a boss 3 fixed to the forward/reverse driving shaft 2 of the motor has two integral flanges 3a and 3b at an appropriate interval on the outer periphery of the intermediate portion in the longitudinal direction. One end is connected to the forward rotation engagement protrusion 1 between the flanges 3a and 3b.
The center part of the forward/reverse transmission switching pawl 9, which has the other end formed at the reversing engagement protrusion 11b at the reversing engagement protrusion 11b, is pivotably pivoted via a pivot pin 8 supported by the flanges 3a, 3b. Further, on the outer periphery of the boss 3, there are a pair of forward rotation pulley covers 6 as forward rotation transmission wheels and a reverse rotation pulley cover 7 as reverse rotation transmission wheels, which face each other so as to sandwich the flanges 3a and 3b. Bearings 5, 5 positioned by stop springs 4, 4 respectively allow the boss 3 to
The pulley cover 6 for forward rotation and the pulley cover 7 for reverse rotation are rotatably attached to each other. These forward/reverse transmission switching pawls 9
The boss 3 having a forward rotation pulley cover 6 and the reverse rotation pulley cover 7 constitute a transmission clutch 1 for forward and reverse rotation according to the present invention.

As shown in FIG. 3, the forward/reverse transmission switching pawl 9 is surrounded by two right sides and an arc, and is connected to the insertion holes 10a and 11a of the pivot pin 8, and the fitting hole 10 of the binding pin 12.
c, 11c and two plate bodies 10, each having a hole therein.
11, the joint portions of the two right sides of each plate body 10, 11 are located at the left and right outer ends with the insertion holes 10a, 11a of the insertion pin 8 at the center, respectively. Binding pin 1 fitted into fitting holes 10c, 11c so as to form engagement protrusion 11b
2 are integrally connected. Note that the forward/reverse transmission switching pawl 9 is not limited to being constructed by bonding two plates like this, but may of course be constructed by processing a single material. .

Further, as shown in FIGS. 1 and 2, the forward rotation pulley cover 6 and the reverse rotation pulley cover 7 have annular recesses 6a and 7a formed on the side surfaces of the pulley covers, which serve as opposing rings, respectively. Four engagement pins 13 as engagement members are implanted at equal intervals along the outer peripheral wall 6b of the annular recess 6a formed in the forward rotation pulley cover 6. and the outer circumferential wall 6b form an engaging portion 13a with which the forward rotation engagement protrusion 10b of the switching pawl 9 engages, and the outer circumferential wall 7 of the annular recessed portion 7a similarly formed on the reverse rotation pulley cover 7.
Along b, four engagement pins 14 as engagement members are planted at equal intervals, and the engagement pins 14 and the outer peripheral wall 7b cause the reversal engagement protrusion 11b of the switching pawl 9. An engaging portion 14a that engages with is formed.

The forward/reverse transmission clutch 1 configured as described above has a forward/reverse rotation driving shaft 2 in the forward rotation direction.
When the rotation begins in the counterclockwise direction shown by the double arrow in the figure, the boss 3 fixed to the driving shaft 2 also begins to rotate in the counterclockwise direction. Two flanges 3 installed opposite
A reversing engagement protrusion 11b at the other end of the forward/reverse transmission switching pawl 9 whose central portion is pivotably pivoted between a and 3b.
After sliding as shown in FIG. 4 along the outer peripheral wall 7b of the annular recess 7a formed on the side surface of the reverse pulley cover 7 rotatably attached to the outer periphery of the other longitudinal side of the boss 3, as shown in FIG. As shown in FIG. 3, the switching claw 9 is swung by contacting any one of the four engaging pins 14 installed along the outer peripheral wall 7b and being repelled in the axial direction. This swinging causes the forward rotation engagement protrusion 10b at one end of the switching claw 9 to
However, as shown in FIG. 5, four pieces are planted along the outer peripheral wall 6b of the annular recess 6a formed on the side surface of the forward rotation pulley cover 6 rotatably attached to the outer periphery of one longitudinal side of the boss 3. Engagement pin 13 and outer peripheral wall 6
The four engaging portions 13a formed by b.
Since it engages with any one of the engaging portions 13a,
The rotational power of the driving shaft 2 in the forward rotation direction is transmitted to the forward rotation pulley cover 6, and at the same time, the power to the reverse rotation pulley cover 7 is cut off.

Contrary to the above, when the drive shaft 2 starts rotating in the clockwise direction opposite to the double arrow shown in FIG. 4, which indicates the reverse direction, the boss 3 fixed to the drive shaft 2 also starts rotating in the reverse direction. With this rotation, one end of the forward/reverse transmission switching pawl 9 whose central portion is slidably pivoted between two flanges 3a and 3b integrally provided on the outer periphery of the intermediate portion in the longitudinal direction of the boss 3 is rotated. Forward rotation engagement protrusion 1
0b separates from the engaging portion 13a formed along the outer peripheral wall 6b of the annular recess 6a formed in the forward rotation pulley cover 6 rotatably attached to the outer periphery of one side in the longitudinal direction of the boss 3, and the outer peripheral wall 6b. After sliding along the same axis, the switching claw 9 swings by contacting the next engagement pin 13 and being flipped in the axial direction, and this swinging causes the reverse rotation engagement protrusion at the other end of the switching claw 9 to swing. Part 1
1b denotes four engaging pins 14 implanted along the outer peripheral wall 7b of an annular recess 7a formed on the side surface of the reverse pulley cover 7 rotatably attached to the outer periphery of the other side in the longitudinal direction of the boss 3 and the outer periphery. Since it engages with any of the four engaging portions 14a formed by the wall 7b, the rotational power of the drive shaft 2 in the reverse direction is transmitted to the reverse pulley cover 7. At the same time, the power to the forward rotation pulley cover 6 is cut off.

In order to achieve the above-mentioned effect, the following relationship needs to exist between the forward/reverse transmission switching pawl 9, the forward rotation pulley cover 6, and the reverse rotation pulley cover 7.

That is, in FIGS. 4 to 7, d = diameter d ₁ of the engagement pins 13, 14 = forward rotation engagement protrusion 10b at one end of the forward/reverse rotation transmission switching pawl 9 or reverse rotation engagement protrusion at the other end 11b
is in contact with the outer peripheral wall 6b of the annular recess 6a formed in the forward rotation pulley cover 6 or the outer peripheral wall 7b of the annular recess 7a formed in the reverse rotation pulley cover 7, the reverse rotation on the side opposite to the side in contact The outer peripheral wall 7 of the engagement protrusion 11b for forward rotation or the engagement protrusion 10b for forward rotation and the pulley cover 7 for reverse rotation
b or gap dimension d ₂ between the outer circumferential wall 6b of the pulley cover 6 for forward rotation and the engagement protrusion 10b for forward rotation at one end of the forward/reverse transmission switching pawl 9 and the annular concave portion 6a formed on the pulley cover 6 for forward rotation. The annular recess 7 formed in the gap between the outer circumferential wall 6b, the reversing engagement protrusion 11b at the other end of the switching claw 9, and the reversing pulley cover 7.
The gap size between the central arc portion 9a of the switching claw 9, the outer circumferential wall 6b of the annular recess 6a, and the outer circumferential wall 7b of the annular recess 7a when the gaps are equal between the outer circumferential wall 7b of the switching pawl 9 d ₃ = Either the forward rotation engagement protrusion 11a at one end of the forward/reverse rotation transmission switching pawl 9 or the reverse rotation engagement protrusion 12b at the other end is connected to the outer periphery of the annular recess 6a formed on the forward rotation pulley cover 6. When contacting either the engaging pin 13 planted along the wall 6b or the engaging pin 14 planted along the outer peripheral wall 7b of the annular recess 7a formed in the reverse pulley cover 7, Forward rotation engagement protrusion 10b or reverse rotation engagement protrusion 11b on the side opposite to the side in contact
and the outer peripheral wall 6b of the annular recess 6a or the outer peripheral wall 7b of the annular recess 7a, the relationship d<d ₁ d<d ₂ d/2>d ₃ needs to be satisfied. be.

By the way, when the forward/reverse transmission switching pawl 9 is pivotally attached by the pivot pin 8, the forward rotation engaging protrusion 10b at one end of the switching 9 and the outer circumferential wall 6b of the annular recess 6a formed on the forward rotation pulley cover 6. As shown in FIG. 6, the gap between the reversing engagement protrusion 11b at the other end of the switching claw 9 and the outer circumferential wall 7b of the annular recess 7a formed on the reversing pulley cover 7 is equal. From the state, the forward rotation engagement protrusion 10b of the switching claw 9
is tilted toward the outer peripheral wall 6b side of the pulley cover 6 for forward rotation, or when the engagement protrusion 11 for reverse rotation of the switching pawl 9
It is of course possible to provide a snap mechanism that biases the pulley cover 7 towards the inclined side when the pulley cover 7 is inclined towards the outer circumferential wall 7b of the reversing pulley cover 7.

Next, an example of the use of the forward/reverse transmission clutch 1 of the present invention will be described.

8 and 9, a long strip-shaped sheet body 1
8 is wound around the shaft of the pulley 16a and the shaft of the pulley 17a arranged with an appropriate interval, and
The forward/reverse rotation drive shaft 2 equipped with the forward/reverse transmission clutch 1 of the present invention is positioned between these shaft bodies, and the forward/reverse rotation pulley cover 6 and pulley 16 of the clutch 1 are connected to each other.
A round belt 16 is hung between the clutch 1's reverse pulley cover 7 and the pulley 17a.
A belt-shaped sheet body 1 with a round belt 17 hung between
8 is shown, and when it becomes necessary to transport the belt-shaped sheet body 18 and the forward/reverse rotation drive shaft 2 is rotated in the reverse direction, which is the direction of the double arrow shown in FIG. At the same time as the reverse rotation pulley cover 7 of the clutch 1 rotates in the reverse direction, the forward rotation pulley cover 6 becomes idle. At the same time, the other side is unwound from the shaft of the pulley 16a which rotates idly in conjunction with the forward rotation pulley cover 6.
It will be transferred in the direction of the double arrow shown in the figure.
Conversely, when the drive shaft 2 is rotated in the forward rotation direction, which is the direction of the double arrow shown in FIG. 7 is in an idling state, the other side of the belt-shaped sheet body 18 is wound onto the shaft of the pulley 16a which rotates via the round belt 16 due to the rotation of the forward rotation pulley cover 6, and at the same time one side is wound up onto the shaft of the pulley 16a which rotates via the round belt 16. It is fed out from the shaft of the pulley 17a, which idles in conjunction with the reversing pulley cover 7, and transported in the direction of the double arrow shown in FIG. 9. At this time, an appropriate frictional resistance or load is applied to the feeding side. If given, the belt-shaped sheet body 18 between the two shaft bodies can always maintain a tensioned state, especially at the position corresponding to the window 19, and the conveying device 15 for such a belt-shaped sheet body 18 can be used, for example, on a bulletin board, It can be widely used for advertising boards, paper blackboards, vision testers, destination guide boards for vehicles, etc.

FIG. 10 also shows a large and small pulley 20 installed on the rotating shaft of a small vehicle, from a forward/reverse transmission clutch 1 of the present invention, which uses a forward/reverse motor driven by a storage battery as its power source and is attached to the shaft of this motor. 2
Figure 1 shows a power transmission mechanism for small vehicles used in factories, etc., which transmits power via a belt. According to this power transmission mechanism, the motor can be rotated simply by operating the forward/reverse switch. This makes it easy to move the vehicle forward faster and slow it backwards.

Furthermore, in FIG. 11, a belt is applied to large and small pulleys 22 and 23 provided on the rotating shaft from the forward/reverse transmission clutch 1 of the present invention, which is attached to the forward/reverse driving shaft. A two-speed high-low speed transmission device is shown, which is configured by switching between high and low speeds.By switching the direction of rotation of the driving shaft between forward and reverse, the rotational speed of the rotary shaft rotating in the same direction can be changed between high and low speeds. This makes it possible to easily switch between the two speeds.

(3) Effects of the Invention The forward and reverse transmission transmission clutch constructed according to the present invention has the following effects.

The power transmission system to the driven side of the forward/reverse driving shaft is
When separating the power transmission system to the driven side that requires only the forward rotation power of the driving shaft and the power transmission system to the driven side that requires only the reverse rotation power, the forward and reverse rotation separate transmission system of the present invention is used. It can be easily separated by attaching only one clutch to the forward/reverse driving shaft.

Since the transmission wheels for forward rotation and the transmission wheels for reverse rotation of the transmission clutch for forward and reverse rotation may have the same configuration, there is no need to distinguish the transmission wheels for forward rotation and reverse rotation and manufacture them separately.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view of a forward/reverse transmission clutch of the present invention attached to a forward/reverse drive shaft, and FIG.
3 is a perspective view of the forward/reverse transmission switching pawl, and FIGS. 4 to 7 are sectional views illustrating the posture of the forward/reverse transmission switching pawl and the positional relationship of the engagement pin, respectively. , FIGS. 8 and 9 are perspective views showing the operation of the forward/reverse transmission clutch of the present invention used in a belt-shaped sheet conveyance device, and FIG. FIG. 11 is a perspective view showing the operation of the transmission clutch for forward and reverse transmission according to the present invention utilized in a two-speed high/low speed transmission. 1...Transmission clutch for forward and reverse rotation, 2...Forward and reverse rotation drive shaft, 3...Boss, 3a, 3b...Flange, 6
...Forward rotation transmission wheel, 6a...Annular recess, 6b...
...Outer peripheral wall, 7... Reverse transmission wheel, 7a... Annular recess, 7b... Outer peripheral wall, 8... Pivot pin, 9...
Forward/reverse transmission switching pawl, 10b...Forward rotation engagement protrusion, 11b...Forward rotation engagement protrusion, 13, 14...
...Engagement pin.

Claims (1)

[Claims] 1. A boss fixed to a forward/reverse driving shaft with two flanges integrally arranged opposite to each other on the outer periphery of a longitudinally intermediate portion, one end formed as an engagement protrusion for forward rotation, and the other end formed as an engagement protrusion for reverse rotation. a forward/reverse transmission switching pawl whose center portion is pivotally mounted between the flanges of the boss so that it can freely swing; and a switching pawl that is rotatably mounted on the outer periphery of one longitudinal side of the boss when the driving shaft rotates in the forward direction. A transmission wheel for forward rotation, which is provided with a plurality of engagement members at predetermined intervals along the outer circumferential wall of an annular recess formed on the side surface of the wheel body, with which the engagement protrusion for forward rotation engages; An engaging member that is rotatably attached to the outer periphery of the other longitudinal side of the boss so as to sandwich the two opposing flanges, and is engaged by the reversing engagement protrusion of the switching pawl when the driving shaft is reversed. 1. A transmission clutch for forward and reverse rotation, comprising a plurality of transmission wheels for reverse rotation provided at predetermined intervals along the outer peripheral wall of an annular recess formed on the side surface of the wheel body.