JPH0460240A - Transmission - Google Patents

Abstract

PURPOSE:To improve the facility of use by having it shifted by planetary operation of a planetary gear mechanism at time of one direction rotation of a turning shaft on one side, and rotating a turning shaft on the other without being shifted by rotation of the whole planetary gear mechanism at time of rotation in the opposite direction. CONSTITUTION:At time of gate opening of a sluice or the like, a handle shaft 14 is rotated in a black arrow direction. At this time, since a cam clutch 36 is turned on and another clutch 37 is off, it is transmitted to a mechanical case 29 of a planetary gear mechanism 20 via an input side cylinder 32, while it is also transmitted to a supporter 21 of a planetary gear 18, whereby the whole body of the planetary gear mechanism 20 is rotated, and an output shaft 16 is rotated in the same direction at a transmission ratio 1. Contrariwise, at time of gate closing, it is rotated in a white arrow direction. At this time, since the cam clutch 36 is OFF and 37 is ON, rotation is transmitted to me supporter 21 of the planetary gear 18 via the supporter 21, and an internal gear 19 is in a static state, so that the output shaft 16 is speeded up and rotated in the same direction.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a transmission device applied to a drive system of a gate opening/closing device for water gates and sluice gates.

2. Description of the Related Art In general, a gate opening/closing device for a water gate or a sluice gate has a configuration shown in FIG.

In FIG. 5, 61 is a stand, and 62 is a stand 61.
This is a gear case fixed above the case 62, and a valve rod 64 connected to a gate (not shown) is screwed into a screw block 63 installed in the case 62. 65 is a bevel gear that drives the screw block 63;
A handle shaft 6 is rotatably supported by the gear case 62, and a handle 67 is fixed to the outer end of the handle shaft. A small bevel gear 681 is fixed to the inner end of the handle shaft 66 and meshes with the bevel gear 65, and together with the screw block 63, bevel gear 65, etc., constitutes a gear mechanism 69 for lifting and lowering the valve stem.

According to such a configuration, when the handle 67 is rotated, this rotational operation force is decelerated through the bevel small gear 68 and the bevel gear 65, and is applied to the screw block 63.
is transmitted to. This rotation of the screw block 63 causes the valve rod 64 to rise or fall.

When the valve stem 64 is raised to open the gate, the rotation operation using the handle 67 is difficult due to the gate's own weight, and conversely, when the valve stem 64 is lowered to close the gate, due to the gravity of the gate. Handle operation becomes easier.

In order to obtain the same handle operation force when opening and closing the gate, it is conceivable to introduce a gear mechanism capable of changing speeds between the gear mechanism 69 and the handle 67.

The following mechanisms are known as conventional mechanisms of this type.

One of these is a system in which a plurality of pairs of gears are always meshed and rotated idle on one shaft, and a clutch that rotates with the shaft is coupled to one of the gears to perform power transmission.

In addition, there is also a system in which a plurality of pairs of gears that mesh with each other via an intermediate gear are fixed to a shaft, and the intermediate gear is moved to selectively mesh with any of the gear pairs to perform transmission.

In addition, multiple pairs of gears are always meshed, the gear is fixed on one shaft, and the gear is left spinning on the other shaft, and a key is moved to selectively engage one of the gears. Some are fixed to a shaft to transmit power.

Problems to be Solved by the Invention In any of the above conventional systems, it is necessary to perform a switching operation for shifting using a manual lever or the like. Therefore, when used in the gate opening/closing device, the handle 67 must be rotated after confirming that the gears are securely engaged, which is inconvenient to use.

The present invention has been made to solve the above problems,
To provide an easy-to-use transmission device capable of automatically changing gears without using a manual operation lever or the like.

Means for Solving the Problems In order to achieve the above object, the present invention provides a pair of rotary shafts that are coaxially located with each other and supported by the device housing, and one of which is housed in the housing of the device. A planetary gear in the planetary gear mechanism is supported, a sun gear in the planetary gear mechanism is fixed to the other rotating shaft, and the sun gear is connected to the one rotating shaft side through one of a pair of one-way clutches that operate in opposite directions. The planetary gear mechanism case side and the sun gear side are connected via the other clutch.

In such a configuration, when one rotating shaft rotates in one direction, the speed is changed by the planetary motion of the planetary gear mechanism, causing the other rotating shaft to rotate in the same direction, and when rotating in the opposite direction, the entire planetary gear mechanism rotates. The other rotating shaft rotates in the same direction without changing speed.

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

In FIG. 1, 1 is a stand, and 2 is a gear case fixed on the stand l. Inside this gear case 2,
The first bevel gear 3 is the first upper and lower pole bearing 4
It is rotatably held via A and 4B. A screw block 6 that is screwed onto the valve stem 5 is fixed to the first bevel gear 3 with bolts 7 or the like. A second bevel gear 8 is rotatably supported by a second pawl bearing 9 in the gear case 2 and meshes with the first bevel gear 3, and is connected to the screw block 6, the first bevel gear 3, etc. Together, they constitute a gear mechanism 10 for lifting and lowering the valve stem.

11 is a handle for opening and closing the gate.

A transmission 12 interposed between the handle 11 and the gear mechanism 10 is coupled to a front protrusion 2A formed on the gear case 2 corresponding to the second bevel gear 8.

The specific configuration of this transmission 12 will be explained based on FIG. 2.

In FIG. 2, reference numeral 13 denotes a device housing, which includes, for example, a cylindrical base 13A, a front flange 13C, and a rear flange 13B. On the rear side of the device housing 13, a handle shaft 14 to which the noddle 11 is fixed is rotatably supported by a pole bearing 15 as an input shaft. On the front side of the device housing 13, an output shaft 16 whose axis is aligned with the handle shaft 14 is rotatably supported independently of the handle shaft 14. The output shaft 16 has an end projecting rearward from the device housing 13 and is configured as a rotation shaft of the second bevel gear 8 .

A planetary gear mechanism 20 having a sun gear 17, a planetary gear 18, an internal gear 19, etc. is disposed within the device housing 13, and supports 21, 22 of the planetary gear 18 are provided.
One end 21 of the handle shaft 14 is prevented from rotating by a spline fitting portion 23 formed on the inner end side of the handle shaft 14. Also,
The sun gear 17 is prevented from rotating by a spline fitting portion 24 formed on the inner end side of the output shaft 16.

Reference numerals 25 and 26 designate a pair of frames that constitute the mechanism case 29 by sandwiching spacer members 27 and 28 between the internal gear 19 in the axial direction, and are connected by a plurality of bolts 30 in the circumferential direction. One frame 25 is fixed by a screw body 33 to the inner end surface of an input-side cylinder 32 rotatably supported on the device/house 13 via a pole bearing 31, and the other frame 26 It is fixed to the inner end surface of an output-side cylinder 34 that is externally fitted onto the shaft 16 with a screw body 35 .

36 and 37 are a pair of one-way clutches that operate in opposite directions. One of the one-way clutches 36 is
It is interposed between the handle shaft 14 and the input side cylindrical body 32, and when the handle shaft 14 rotates in one direction (black arrow direction), it transmits the rotational force to the sun gear 17 side via the mechanism case 29. It is set so that when it becomes ON (connected state) and rotates in the opposite direction (white arrow direction), it becomes OFF (disconnected state). In addition, the other one-way clutch 37
is interposed between the output side cylindrical body 34 and the device housing 13, and when the handle shaft 14 is rotated in one direction, it is turned OFF to allow rotation of the mechanism case 29, and when it is rotated in the opposite direction, it is turned ON. It is set so that

As the one-way clutch 36, 37, for example, the third
A cam clutch as shown in the figure is used. As is well known, in this cam clutch, a large number of cams 38 arranged in parallel in one circumferential direction are connected to an inner ring 40 and an outer ring 40 by the spring force of a spring 39.
When a relative rotational force acts between the inner ring 40 and the outer ring 41, the cam 38 engages in one direction and turns ON, and in the opposite direction, the cam 38 becomes free and turns off.

In addition, in FIG. 2, 42 is a pole bearing inserted between the input side cylinder 32 and the housing shaft 14.

In such a configuration, when opening the gate, the handle 11 is rotated to rotate the handle shaft 14 in the direction of the black arrow. At this time, one cam clutch 36 is ON and the other cam clutch 37 is OFF, so the rotation of the handle shaft 14 is as shown in FIG.
One cam clutch 36. The signal is transmitted to the mechanism case 29 of the planetary gear mechanism 20 via the input side cylinder 32, and is also transmitted to the support body 21 of the planetary gear 18. Therefore, the entire planetary gear mechanism 20 rotates, and the output shaft 16 rotates at the gear ratio l.
to rotate in the same direction.

The rotation of this output shaft 16 is caused by the rotation of the first gear mechanism 10 for lifting and lowering the valve stem.
Since the speed is reduced by the second bevel gears 3 and 8, the valve stem 5 can be raised with low torque.

Conversely, when opening the gate, the handle 11 is operated to rotate the handle shaft 14 in the direction of the white arrow. At this time, one cam clutch 36 is OFF and the other cam clutch 37 is ON, so the rotation of the handle shaft 14 is transmitted to the support 21 of the planetary gear 18 via the support 21. At this time, since the internal gear 19 of the planetary gear mechanism 20 is in a stationary state, the planetary gear 18 rotates and revolves, and the output shaft 16 is accelerated and rotates in the same direction. The rotation of the output shaft 16 is decelerated by the first and second bevel gears 3 and 8 of the valve stem elevating gear mechanism IO, thereby lowering the valve stem 5.

By providing the above-mentioned transmission device 12, the gate can be opened and closed with the handle 11 being rotated with ease, and the speed at which the gate is closed can be increased.

In particular, since the transmission device 12 automatically shifts gears depending on the rotational direction of the handle shaft 14, there is no need to operate a lever to change gears when switching between opening and closing the gate, and this eliminates the need for emergency gear changes. Easy to use.

In the above embodiment, a cam clutch is used as the one-way clutch 36°37, but other types such as a ratchet type clutch may also be used. The arrangement is also not limited to the above.

Furthermore, in the above embodiments, the explanation has been given of the application to a gate opening/closing device, but it is impossible to use it for shifting the speed of other equipment. Furthermore, the input shaft 14 of the transmission 12
It is also possible for the output shaft 16 and the output shaft 16 to be used in opposite manners.

Effects of the Invention As described above, according to the present invention, by a combination of a planetary gear mechanism interposed between a pair of coaxial rotating shafts and a pair of one-way clutches, the rotation of one of the rotating shafts is Since it is configured to change the speed of rotation in one direction and transmit it to the other rotating shaft, it is possible to shorten the gate lowering time when used in a gate opening/closing device, for example.Moreover, there is no need to manually change the speed, making it extremely becomes easier to handle.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an example in which a transmission according to an embodiment of the present invention is used in a gate opening/closing device, Fig. 2 is an enlarged sectional view of the same transmission, and Fig. 3 is a one-way clutch in the same transmission. FIG. 4 is a diagram illustrating an example of the operation of the planetary gear mechanism in the transmission, and FIG. 5 is a half-longitudinal cross-sectional view showing a conventional gate opening/closing device to which the transmission is applied. 13... Device housing, 14.16... Rotating shaft. 17...Sun gear, 18...Planetary gear, 19...
Internal gear, 20... Planetary gear mechanism, 29... Mechanism case, 36.37... One-way clutch. Figure 1

Claims (1)

[Claims] 1. A planetary gear in a planetary gear mechanism housed in the device housing is supported on one of a pair of rotating shafts coaxially disposed with each other and supported in the device housing; The sun gear in the planetary gear mechanism is fixed to the rotating shaft of the planetary gear mechanism, and the one rotating shaft side and the sun gear side are connected via one of a pair of one-way clutches that operate in opposite directions, and the other clutch is connected to the sun gear side. A transmission characterized in that the planetary gear mechanism case side and the sun gear side are connected through an intermediary.