JPH0743016B2 - Drive source switching device for switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention switches the power for opening and closing a floodgate of a dam, a river, etc. from electric (manual) to engine drive or from engine drive to electric. The present invention relates to a drive source switching device for a hoist.

<Prior Art> A conventional drive source switching device includes a lever for switching a power path between an electric motor and an engine, a lever for switching between electric and manual, a lever for changing a rotation direction, a lever for opening and closing a braking device, and the like. It is equipped with.

<Problems to be Solved by the Invention> However, in the above-mentioned conventional example, since an independent operation lever is provided for each function, the configuration is very complicated and the operation performance is poor, especially when lowering the gate. There is a defect that the direction of rotation of the drive source is the same as the direction of rotation due to the falling load of the gate, making it difficult to control the descending speed.

Therefore, in the present invention, the drawbacks of the above conventional example are improved,
A switching device having a simple structure and capable of smoothly lowering a gate.

<Means for Solving the Problems> A differential gear mechanism interposed between an electric input shaft and an output shaft, and a manual input path and an engine drive path which are linked to a preliminary input portion of the differential gear mechanism. It is composed of a relay shaft that is selectively connected and a braking mechanism that is interposed in the middle of the engine drive path.

<Operation> The present invention is configured as described above, and when driven by electric power, the relay shaft is brought into a braking state and the path of engine input is divided to accept only electric power input.

Also, when the electric input cannot be obtained due to a power failure, etc., the braking device in the electric motor is operating and the rotation of the electric output shaft is kept in the braking state, so if the relay shaft is switched to the engine drive in this state, The relay shaft receives a drive input from the engine via a braking mechanism for speed control, and transmits power to an output shaft via a differential gear mechanism.

<Embodiment> Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings. First, as shown in FIG. 1, the present invention is a differential gear mechanism 7, a braking mechanism 23 for speed control, and an engine input. A switching clutch mechanism 15 for changing the rotation direction of the engine and a clutch mechanism 13 for switching between manual operation and engine drive. The clutch mechanism 15 and the clutch mechanism 13 are selectively switched by a switching operation cam mechanism. Has been done.

Further, to describe the above in detail, an electric motor (not shown) extends from _one outer wall 11 of the machine casing 1 to the support wall 4 in the machine casing 1.
While Kururuka the input shaft 2 which is the output shaft and connected, over between another supporting wall 9 of the machine housing 1 from the other of the outer wall 1 _2, the output shaft 11 on the extension of the input shaft 2 The input shaft 2 and the output shaft 11 are pivotally mounted, and the differential gear mechanism 7 is continuously connected to the shaft end facing portions of the input shaft 2 and the output shaft 11.

That is, the differential gear mechanism 7 has a structure that is normally used, and includes an outer ring gear 5 and two gears that are pivotally supported near the center of the gear 5 by a radial shaft center with respect to the shaft center of the gear 5. A bevel gear 8 and bevel gears 3 and 10 which are on both sides of the outer ring gear 5 and mesh with the bevel gear 8, and the bevel gear 3 is connected to the electric input shaft 2
By fitting the bevel gear 10 to the inner end of the output shaft 11, the power between the input shaft 2 and the output shaft 11 is relayed.

The input shaft 2, and Kururuka the output shaft 11 laterally intermediate shaft 12 from one of the outer wall 1 ₁ of this parallel to Kikatami 1 through the support walls 9 over between the other of the outer wall 1 ₂ in the the gear 6 is fitted onto the intermediate shaft 12 the ring gear 5 in meshing, on the one half portion 18 ₁ of the intermediate shaft 12 was rotated freely pivotally supported via a bearing on the shaft 12 A gear 14 and a clutch mechanism 13 (composed of a brake plate) for engaging and disengaging are attached, and a worm (not shown) provided on a manual handle 39 pivotally provided outside the machine casing 1 is meshed with the gear 14. the manual operation via a clutch mechanism 13 as allowed to interlock the intermediate shaft 12, still on the other half 18 ₂ of the intermediate shaft 12 has two gears rotate freely pivotally supported via a bearing Clutch mechanism 15 (brake which can be selectively engaged with 16, 17 or maintained in a neutral state in which neither is engaged Provided constituted) by a plate, mesh engagement gear 21 on shaft 22 which is Kururuka over the machine housing external wall 1 ₂ a support wall 9 to the gear 17, the outer wall to the gear 16
First gear 19 provided on the shaft 22 through the relay gear 20 which is pivoted to the ₂ and meshing, and to switch the path of power to the gear 21 or 19 by the operation of the clutch mechanism 15.

And, on the central extension line of the shaft 22, from the machine casing outer wall 1 ₁ over the support wall 37 by Kururuka the input shaft 38, further between the inner end of the inner end and the input shaft 38 of the shaft 22 The output shaft 24 of the speed control braking mechanism 23 and the clutch cylinder 28 are fitted and connected to each other, and the outer end of the output shaft 24 is fitted and connected to the end of the shaft 22.

Here, the braking mechanism 23 for speed control is shown in FIGS.
It is configured as shown in the figure. That is, spline grooves 32 ₁ and 32 ₂ are formed in the inner back portion and the mouth portion of the outer shell body 32, respectively, and the spline groove 32 is formed in the outer shell body 32.
_The slide ring 34 that fits with ₂ is slidably fitted along the spline groove, and the slide ring 34 is always inserted between the slide ring 34 and the side wall 33 of the outer shell 32. The outer shell body is provided with a spring 35 that presses in the direction of
32 to face the end surface of and by the adjustment screw 33 ₁ inserted and attached so as to adjust the elastic pressure force of the spring 35, the output shaft 24 formed with splines 26 on the inner end toward the outer circumference the slide ring 34, the outer shell The output shaft 24 is inserted into the slide ring 34 and the side wall 33 while the end portion is exposed to the outside through the side wall 33 of 32.
Each of the parts is rotatably supported by bearings.

The spline groove 26 ₁ of the output shaft 24 is formed with a spline groove 27 ₁ on the outer periphery, and the end surface has a clutch claw including a long inclined surface 27 a and a short inclined surface 27 d as shown in FIGS. 6 to 8. , short inclined surface 27b and a long inclined surface clutch cylinder 27 formed alternately and recesses consisting 27c fitted by splines 27 ₂ None and sliding freely, further, the clutch cylinder 27
In the spline groove 27 ₁ on the outer periphery of the, a rotary braking plate having an outer diameter not reaching the spline groove 32 ₁ is mounted so as to rotate together with the clutch cylinder 27 and slide along the spline groove 27 _1. On the other hand, between the rotary braking plates, the braking portion 30 has an inner diameter that does not reach the outer circumference of the spline groove 27 ₁ , and fixed brake plates slidably mounted in the spline groove 32 ₁ are alternately interposed. Further, the side surface of the adjusting nut 31 screwed to the rear end of the clutch cylinder 27, that is, the outer periphery of the opposite side where the clutch pawl is provided is brought into contact with one side of the braking plate.

In addition, a holding plate 29, which is in contact with the other side of the braking plate and receives the braking plate, is screwed into the one end opening of the outer shell 32.
At the center of the holding plate 29, a clutch cylinder 28 is formed between the tip shaft portion of the output shaft 24 and a clutch cylinder 28 in which a concave portion formed of inclined surfaces 28a and 28d and a clutch pawl formed of inclined surfaces 28b and 28c are alternately formed at the tip. Rotatably and pivotally supported by a bearing on the clutch cylinder
The clutch claws 27 are made to face each other so as to engage with each other, and the shoulder portion of the clutch cylinder 28 is provided with a holding plate 29 and an outer shell body via bearings.
It is rotatably and pivotally supported by a restraining ring 36 screwed to the end face of 32.

As described above, the braking mechanism 23 inserts and connects the end face connecting hole 25 of the output shaft 24 to the inner end of the shaft 22, and connects the end face connecting hole 28 ₁ of the clutch cylinder 28 to the output shaft of the engine (not shown). It is fitted and connected to the inner end of the engine input shaft 38 connected to the. The clutch mechanisms 13 and 15 are the machine casing 1
The power switch lever 40 installed on the front side of the switch operates in conjunction with a switching operation cam mechanism, and reference numeral 41 in the figure denotes a changeover switch.

Next, a series of operations of the present invention will be described. First, in the case of electric drive, the changeover clutch mechanism is set by setting the changeover lever 40 to the solid line position (electric or manual) "b" as shown in FIG.
15 is in the neutral position, the gears 16 and 17 are kept free with respect to the relay shaft 12, the clutch mechanism 13 is in the engaged state (on), and the gear 14 and the relay shaft 12 that mesh with the worm on the manual handle 39. Since the relay shaft 12 and the coaxial gear 6 are brought into a braking state because they are integrally engaged with each other, and the electric motor is driven at this time to rotate the electric input shaft 2 in the arrow direction, the differential gear mechanism 7 Although the bevel gear 3 also rotates, the outer ring gear 5 is held stationary because it meshes with the gear 6 on the relay shaft 12 in the braking state, and as a result, the rotation is transmitted to the bevel gear 8, and the gear is further rotated.
The output shaft 11 is rotated through 10 in the direction of the solid arrow.

When the electric power input is stopped in this state, the electric motor is braked by the built-in brake, so the input shaft 2
Is held immobile, and the gear 14 is rotated by rotating the manual handle 39, and the relay shaft 1 is rotated through the clutch mechanism 13.
2. Rotate the outer ring gear 5 through the gear 6. At this time, the gear 3 is kept stationary by the braking action in the electric motor. Therefore, the rotation of the bevel gear 8 on the bevel gear 3 transmits the rotation to the bevel gear 10, and the output shaft 11 is moved in the solid line or dotted line direction. Can be turned to.

Next, at the time of power failure or in other cases, to open the water gate by the engine, switch the switching lever 40 on the front of the machine casing 1 to the 12th position.
By setting it to the "open" position "a" in the figure,
The switching clutch mechanism 15 engages the gear 17 with the relay shaft 12, releases the engagement between the gear 16 and the relay shaft 12, and simultaneously operates the clutch mechanism 13 to engage and release the gear 14 and the relay shaft 12,
In this state, the input shaft 38 is rotated in the arrow direction by driving the engine.

When the clutch cylinder 28 rotates clockwise, the slope 28c of the clutch claw moves and engages with the step portion between the slope 27c and the slope 27d of the clutch cylinder 27 to engage the clutch cylinders 28 to 27.
To transmit torque to the clutch cylinder 27,
Thrust 28c and 27c apply thrust in the thrust direction,
The clutch cylinder 27 is moved in the dotted line direction while compressing the spring 35 via the slide ring 34, and accordingly, the adjustment nut is moved.
31 also moves, the engagement between the fixed braking plate and the rotating braking plate loosens, and the braking action is released by itself, and the rotation is transmitted to the output shaft 24 via the spline groove 26.

Then, after that, the shaft 22, the gears 21, 17, the relay shaft 12, the gears 6,
Transmission to 5,8,10 and the output shaft 11 and output is obtained. Next, by setting the switching lever 40 to the “open” position “c” in FIG. 12, the switching clutch mechanism 15 connects the gear 16 to the relay shaft.
The engagement between the gear 17 and the relay shaft 12 is released, and the clutch mechanism 13 brings the engagement between the gear 14 and the relay shaft 12 into the released state.

Then, by driving the engine to rotate the input shaft 38 in the arrow direction (the same direction as the previous time), the shaft 22 also rotates in the same direction, and further the shaft 19, the relay gears 20, 16 and the relay shaft 12 and the gear 6 ,
After passing through 5, 8 and 10, the output shaft 11 is rotated in the direction of the dotted arrow to close the water gate. In this case, the output shaft of the engine
When the rotation direction of 11 and the direction of action on the output shaft 11 by the fall of the gate are the same, and the rotation speed caused by the drop is higher than the rotation speed from the engine, the clutch cylinder
27 moves in the direction of the arrow relative to 28,
As a result, the clutch cylinder 27 moves on the slope 28c due to the slope 27c and the elasticity of the spring 35, and the two clutch cylinders 27, 28 come closer to each other, and accordingly, the nut 31 pressurizes the braking plate and the clutch. The rotation of the cylinder 27 is prevented to prevent a sudden drop due to the weight of the gate, and when the rotation by the engine is given, the rotation is transmitted to the output shaft 24 while releasing the braking action.

In this way, the braking mechanism 23 always descents at a constant speed while absorbing the "deviation" between the rotational speed due to the fall and the rotational speed due to the engine.

In this way you can stop the engine while opening the gate,
When the belt is disconnected, the clutch claw is engaged to brake, and when the engine is stopped during the descent, or when the belt is cut, the braking plate is operated by the inclination of the clutch claw to prevent the sudden descent.

<Effect of the Invention> Since the present invention is configured as described above, when the engine is stopped while the water gate is opened, or when the belt for transmitting power from the engine is disconnected, the clutch pawl of the braking mechanism is It works to prevent the gate from falling naturally.

Further, when the engine is stopped or the belt is cut while the water gate is closed, the brake plate immediately acts to prevent a sudden drop, which is a highly safe invention.

[Brief description of drawings]

1 to 12 show an embodiment of the present invention, FIG. 1 is a cross-sectional plan view of a switching device, FIG. 2 is an enlarged plan view of essential parts, and FIG. 3 is a partial cutout of a clutch cylinder. FIG. 4 is a side view, FIG. 4 is a plan view of FIG. 3, FIG. 5 is a developed schematic view of FIG. 3, and FIG. 6 is a partially cutaway side view of a clutch cylinder different from FIG. 6 is a plan view of FIG. 6, FIG. 8 is a developed schematic view of FIG. 6, FIG. 9 is an external front view of FIG. 1, FIG. 10 is a right side view of the same as above, and FIG. FIG. 9 is a plan view and FIG. 12 is a partially enlarged front view of FIG. 7 ... Differential gear mechanism, 13 ... Clutch mechanism 15 ... Switching clutch mechanism, 23 ... Braking mechanism 24 ... Output shaft, 26,27 ₁ , 27 ₂ , 32 ₁ , ₁ , 32 ₂ ... Spline groove, 27 , 28 …… Clutch cylinder, 27a, 27b, 27c, 27d, 28a, 28b, 28c, 28d …… Slope, 29 …… Holding plate, 30 …… Braking part 32 …… Outer shell, 33 …… Side wall 34… … Slide ring

Claims (1)

[Claims] 1. A differential gear mechanism is interposed between an electric input shaft and an output shaft, a relay shaft is linked to a preliminary input portion of the differential gear mechanism, and a clutch mechanism is provided on one of the relay shafts. A manual input shaft is connected to the relay shaft, and a switching clutch mechanism is provided on the other side of the relay shaft so that the forward and reverse rotations and the neutral state can be maintained. A drive source switching device in an opening / closing device, characterized in that an engine drive shaft is connected via a braking mechanism for.