JPS6127897Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a traveling drive device for a hoist or other lifting and transporting device that lifts a load and moves it, and in particular has a slow-speed drive device that can perform normal running and slow-speed running when moving. This invention relates to a traveling drive device.

Generally, when traveling with a lifted load (load), there is a problem in that the load swings, especially when starting and stopping. For this reason, when starting and stopping, it is common practice to run at a very slow speed, which is lower than the normal speed. A traveling drive device capable of running at two or more speeds includes a main speed motor for normal travel, a slow speed motor for slow speed travel, and a main speed motor for normal travel.
The most common type consists of a gear group that connects both electric motors.

However, there is a certain speed difference between slow-speed running and normal running, depending on the gear ratio setting according to the gear group configuration, and when switching between the two speeds, load swing may occur due to the inertia of the suspended load. There was a problem.

In addition, in the case of a motor equipped with both a main speed motor and a slow speed motor as described above, the distance between the two motor shafts may be changed depending on whether or not the terminal position of the motor can be varied and the cooling conditions.
If the two shafts must be separated by a certain amount or more, and if the two shafts are connected by a gear group that makes up the required gear ratio, the configuration will be unreasonable with two main and slave gears due to the relationship between the dimensions between the two shafts. Therefore, an idle gear or the like must be provided in the intermediate portion, which has the disadvantage of complicating the configuration of the gear group. Moreover, since it is a gear, there is a problem that not only is the shock when switching speeds large, but also the noise is large.

Therefore, an object of the present invention is to provide a traveling drive device with very low speed that solves such problems.

The structure of the present invention to achieve this purpose is as follows:
A main speed motor and a slow speed motor are mounted on one side of the mounting plate with one end of the main speed rotating shaft of the main speed motor and one end of the slow rotating shaft of the slow speed motor penetrating the mounting plate at right angles; A clutch plate is fixed to one end of the main speed rotating shaft, and a first toothed pulley is provided between the clutch plate and the mounting plate so as to be rotatable and slidable on the main speed rotating shaft. A first biasing means is provided between the attached pulley and the mounting plate, and a clutch coil is embedded in the mounting plate, while a traveling wheel is connected to the other end of the main speed rotating shaft, and a driving wheel is connected to the other end of the main speed rotating shaft. A second toothed pulley and a brake plate are fixed at one end toward the tip, and a toothed belt is wrapped around the first toothed pulley and the second toothed pulley, and a plurality of supports are provided around the brake plate. A rod is provided upright on the mounting plate, and the support rod is provided with a movable piece that can freely slide along the support rod toward the tip and a brake yoke fixed to the support rod, and the movable piece and the brake A second biasing means is provided between the brake yoke and the brake yoke, and a brake coil is embedded in the brake yoke.

Next, a traveling drive device with slow speed according to the present invention will be explained with reference to an embodiment shown in the drawings.

What is shown in the drawings is a configuration in which the present invention is implemented in a hoist traveling drive device.

Reference numeral 1 denotes a main speed electric motor, and the electric motor 1 is located on one side (the right side in the figure) of the mounting plate 2. The main speed rotating shaft 11 of the main speed electric motor 1 It is inserted through a hole 21 provided in 2, and is rotatably provided in the hole 21 via a bearing 12. Further, the stator frame 13 of the main speed electric motor 1 is integrally coupled to the mounting plate 2 with mounting bolts 14 that pass through the mounting plate 2.

3 is a first toothed pulley, and the pulley 3 is
It is provided on the main speed rotating shaft 11 at a portion passing through the mounting plate 2 via a rotatable bearing 31 provided so as to be able to slide in the axial direction.
Between this first toothed pulley 3 and the mounting plate 2,
A predetermined slide gap (dimension G in the drawing) is provided, and a clutch coil 32 is embedded in a portion of the mounting plate 2 that faces the first toothed pulley 3.

The inner diameter of the hole 21 provided in the mounting plate 2 is sufficiently larger than the outer diameter of the main speed rotating shaft 11 inserted into the hole 21, and the main A clutch spring 24 as a first biasing means is interposed on both bearing sides of the fast rotation shaft 11 via ring-shaped spacers 22 and 23, respectively. This clutch spring 24
is for pressing the first toothed pulley 3 to the left in the figure. A cylindrical spacer 25 is provided on the outer peripheral side of the clutch spring 24 and between the ring-shaped spacers 22 and 23.

32' is a clutch plate provided with a clutch lining 33, and this clutch plate 32' has a spline groove 11a provided on the main speed rotating shaft 11.
It is provided so that it can only move in the axial direction via a mechanism such as.

Reference numeral 34 denotes an adjustment fitting that is screwed to the shaft end of the main speed rotating shaft 11 and can be threaded in the axial direction. The axial length of the clutch spring 24 is adjusted by adjusting the coupling force between the clutch plate 32' and the first toothed pulley 3, which are coupled via the clutch lining 33. For example, the clutch plate 32' and the first toothed pulley 3 are pushed to the right in the figure in order to compensate for a decrease in the joining force due to wear of the clutch lining 33.
Normally, this adjustment fitting 34 is attached to the clutch plate 32' via a mounting bolt 35, and it restricts the movement of the clutch plate 32' in the axial direction, and also prevents the adjustment fitting 34 from rotating. regulated.

As described above, the first toothed pulley 3 provided on the main speed rotating shaft 11, the clutch plate 32', the clutch spring 24 that presses and connects the first toothed pulley 3 to the clutch plate 32', and the first toothed pulley. A so-called clutch is constituted by a clutch coil 32, etc., which attracts the first toothed pulley 3 against the biasing force of the clutch spring 24, thereby releasing the connection between the first toothed pulley 3 and the clutch plate 32'.

In the state shown in the drawing, the clutch coil 32 is
This is a state in which the first toothed pulley 3 and the main speed rotating shaft 11 are connected (ON). When the clutch coil 32 is energized and excited, the first toothed pulley 3 is attracted against the urging force of the clutch spring 24, moves to the right in the figure, and is separated from the clutch lining 33 of the clutch plate 32'. , the first toothed pulley 3 and the main speed rotating shaft 11 are in a disconnected (OFF) state.

Reference numeral 4 denotes a slow speed electric motor, and the electric motor 4 is installed on the mounting plate 2 on the same side as the main speed electric motor 1, spaced apart by a required distance, and with its rotating shaft parallel to the main speed electric motor 1. , the slow rotation shaft 41 of this slow speed electric motor 4 is connected to the hole 26 provided in the mounting plate 2.
and insert the bearing 42 into this hole 26.
It is rotatably provided via the. Further, the stator frame 43 of this slow-speed electric motor 4 is integrally connected to the mounting plate 2 with mounting bolts 44 that pass through the mounting plate 2.

Reference numeral 5 denotes a second toothed pulley having a diameter smaller than that of the first toothed pulley 3, and the pulley 5 has a spline groove 41a, etc. on the slow rotation shaft 41 and in a portion protruding from the mounting plate 2. It is provided so that it can move in the axial direction via a mechanism.

Stop rings 51 and 52 are provided at both ends in the axial direction of the outer circumference of the second toothed pulley 5, and are hung between the first toothed pulley 3 and the second toothed pulley 5. Toothed bell 53
The toothed belt 53
The second toothed pulley 5 is prevented from falling off from the second toothed pulley 5.

A cylindrical spacer 45 is provided on the slow rotating shaft 41 and between the second toothed pulley 5 and the bearing 42, and restricts the movement of the second toothed pulley 5 to the right in the figure. It is done like this.

6 is an electromagnetic brake, and the electromagnetic brake 6
A brake plate 61 provided on the spline groove 41a at the shaft end of the slow rotating shaft 41 and provided with a brake lining 62, and a plurality of support rods surrounding the brake plate 61 and implanted in the mounting plate 2. A movable piece 64 that is slidably provided on the brake lining 63 and comes into contact with and separates from the brake lining 62, a brake yoke 65 fixed to the tip of the support rod 63, a brake coil 66 embedded in the brake yoke 65, and a brake yoke 65. The brake spring 68 serves as a second biasing means which is recessed in the recess 67 and abuts against the movable piece 64 to press the movable piece 64 to the right in the figure.

In the state shown in the drawing, the brake coil 66 is
In the OFF state, the movable piece 64 and the brake plate 61 are pressed into engagement via the brake lining 62 due to the pressing force of the brake spring 68, and the brake is applied in the ON state. If the brake coil 66 is energized and excited, the brake spring 68
The movable piece 64 is attracted against the biasing force and moves to the left in the figure, thereby separating the movable piece 64 from the brake lining 62 of the brake plate 61, resulting in a brake release (OFF) state. .

Reference numeral 7 denotes a cover that covers the first toothed pulley 3, second toothed pulley 5, electromagnetic brake 6, etc., and is attached and fixed to the mounting plate 2.

Reference numeral 8 denotes a reducer provided in interlocking connection with the main speed rotating shaft 11 and the stator frame 13, and a gear 82 provided on the output shaft 81 of the reducer 8 is connected to a traveling wheel 93 of the hoist 9, which will be described later. The driving wheel 93 is driven by meshing with a gear 94 that is integrated with the wheel.

9 is a hoist main body; 91 is a frame provided on the hoist main body 9 and to which the speed reducer 8 is integrally connected; this frame 91 is provided with running wheels 93 that engage with running rails 92; There is. Although the structure on the right side of the running rail 92 in the figure is not shown, this portion has the same structure as the left side. Reference numeral 94 denotes a gear disposed on the axis of the running wheel 93, and the gear 82 of the reduction gear 8 described above meshes with this gear 94, thereby controlling the rotation of the main speed electric motor 1 and the slow speed electric motor 4. The driving force is transmitted.

Next, the operation of the slow speed traveling drive device having the above-described configuration will be explained.

In the state shown in the figure, the main speed rotating shaft 1 and the first toothed pulley 3 are coupled via the clutch plate 32'.
Also, the brake plate 61 and movable piece 64 of the electromagnetic brake 6
is in a state in which the brake spring 68 is pressed into engagement with the brake spring 68 to apply braking, and the travel drive device is in a stopped state.

The case of starting from this state will be explained. First, the brake coil 66 is energized and excited,
This causes the movable piece 64 to move to the left in the figure against the biasing force of the brake spring 68, thereby releasing the brake. Then, the electric motor 4 for slow speed is driven, and the first toothed pulley 3 is driven via the second toothed pulley 5 and the toothed belt 53, and the first toothed pulley 3 is connected to the main speed via the clutch plate 32'. The rotary shaft 11 is driven, and the traveling wheels 93 are also rotationally driven via the reducer 8. When the vehicle is running with the slow speed electric motor 4, the main speed electric motor 1 and the clutch coil 32 are in an OFF state.

After starting by operating the slow speed electric motor 4 and increasing the running speed, the clutch coil 32
is energized to attract and move the first toothed pulley 3 to the right in the figure against the biasing force of the clutch bar 24, thereby separating the first toothed pulley 3 and the clutch plate 32'. At the very least, the engagement between the first toothed pulley 3 and the main speed rotating shaft 11 is released so that the two can rotate independently. Then, the power supply to the slow speed motor 4 is turned off, and the main speed motor 1 is energized, and the running wheels 93 are rotationally driven by the main speed motor 1, thereby shifting to normal running.

When switching from normal running to slow speed running or stopping, the power to the main speed motor 1 and clutch coil 32 is turned off, and on the contrary, the power to the slow speed motor 4 is turned on. As a result, the first toothed pulley 3 is pushed to the left in the figure by the biasing force of the clutch spring 24, and the clutch plate 3 is moved through the clutch lining 33.
2', the main speed rotating shaft 1 of the main speed electric motor 1
1, whereby the rotational driving force of the slow-speed electric motor 4 is transmitted to the running wheels 93, and the mode is switched to slow-speed running. When stopping, turn off the power to the slow speed motor 4.
Then, the brake coil 66 of the electromagnetic brake 6 may be energized.

In the case of switching from normal running to slow speed running as described above, it depends on whether or not the slow speed electric motor 4 has already been rotationally driven at the time when the first toothed pulley 3 and the clutch plate 32' are joined. Although there is a slight difference, the clutch plate 32' is rotating due to the inertia of the main speed motor 1 that is turned off or the inertia from running, and the clutch plate 32' is in a stationary state or being rotated at a slow speed by the slow speed motor 4. The shock caused by the difference in rotational speed between the clutch lining 33 and the first toothed pulley 3 is absorbed by the clutch lining 33 slipping.

In addition, the traveling drive device with slow speed according to the present invention is
The present invention is not limited to hoist traveling devices, but can be applied to saddle traveling devices in cranes, etc., and other various types of unloading and transporting devices.

As explained above, according to the present invention, since a toothed belt is used, even if the first toothed pulley or the second toothed pulley slides in the axial direction, the toothed belt will not come off, and the toothed belt will not come off. Do not apply excessive twisting force to the Since oil supply is not required, even if the clutch plate or brake plate is placed near the first toothed pulley or the second toothed pulley, slippage of the clutch or brake due to oil will not occur. Therefore, the device can be miniaturized and maintenance and inspection are easy.

In addition, since the main speed motor and the slow speed motor are interlocked and connected by a pair of toothed pulleys and a toothed belt, the rotational driving force is reliably transmitted.
In addition, the main speed and slow speed motors and the spacing between them can be set arbitrarily so that the cooling effect of each motor is sufficient. Furthermore, this allows the terminals of both motors to be installed freely and reduces noise. This has the effect of making it possible to

Particularly when switching from normal running to slow speed running, there is a speed difference between the rotational speed of the main speed rotating shaft and the first toothed pulley driven by the slow speed electric motor, and the two come into contact. If this occurs, a shock will occur, but this will be absorbed to some extent by the slippage of the clutch lining when the first toothed pulley and the clutch plate come into contact. Moreover, since the first toothed pulley has a large disc shape and has a large inertia, the absorption effect is even greater.

Furthermore, as mentioned above, the shock that cannot be absorbed by the clutch lining and the first toothed pulley is transmitted to the toothed bell, and since this belt has the required elastic force,
It can easily respond to shocks due to speed changes by expanding and contracting, and has the effect of not damaging this belt or the electric motor for slow speeds. This solves the problem of load swinging.

[Brief explanation of the drawing]

FIG. 1 is an overall view showing an example in which the slow speed traveling drive device of the present invention is implemented in a traversing hoist, and FIG. 2 is a sectional view of the main parts. DESCRIPTION OF SYMBOLS 1...Main speed electric motor, 2...Mounting plate, 3...First toothed pulley, 4...Slow speed electric motor, 5...Second toothed pulley, 11...Main speed rotating shaft, 24... Clutch spring, 32...Clutch coil, 32'...
Clutch plate, 41... slow rotation shaft, 53... toothed belt, 61... brake plate, 63... support rod,
64...Movable piece, 65...Brake yoke, 66
... Brake coil, 68 ... Brake spring, 9
3... Running wheels.

Claims (1)

[Scope of utility model registration request] A main speed motor and a slow speed motor are mounted on one side of the mounting plate with one end of the main speed rotating shaft of the main speed motor and one end of the slow rotating shaft of the slow speed motor penetrating the mounting plate at right angles, and A clutch plate is fixed to one end of the main speed rotating shaft, and a first toothed pulley is provided between the clutch plate and the mounting plate so as to be rotatable and slidable on the main speed rotating shaft. A first biasing means is provided between the pulley and the mounting plate, and a clutch coil is embedded in the mounting plate, while a traveling wheel is connected to the other end of the main speed rotating shaft, and one end of the slow rotating shaft is connected to a running wheel. A second toothed pulley and a brake plate are fixed toward the tip thereof, and a toothed belt is stretched between the first toothed pulley and the second toothed pulley, and a plurality of support rods are provided around the brake plate. is provided upright on the mounting plate, and the support rod is provided with a movable piece that can freely slide along the support rod toward the tip and a brake yoke fixed to the support rod, and the movable piece and the brake yoke are provided on the support rod. A traveling drive device with very low speed, characterized in that a second urging means is provided between the brake yoke and a brake coil is embedded in the brake yoke.