JPS5882111A - Reduction gear wear detection device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device having a reduction gear such as a hoist, and particularly to a reduction gear wear detection device suitable for checking wear of the reduction gear.

The principle of a conventional hoisting device is shown in FIG. When power is applied to the hoisting mode 5, the brush is simultaneously released, driving the reduction gear 4 and rotating the drum 1.
The wire rope 2 is wound up, the load block 3 is hoisted up or down, and the load is raised or lowered. Maintenance and inspection are important and indispensable for such hoisting devices, but they have the disadvantage that they are rarely carried out due to the high location of the device.

The purpose of the present invention is to make it easier to check the wear of the reduction gear in a hoist or other hoist, and to indicate when the gear has reached its wear limit by displaying an abnormality on the gear or stopping the hoisting body. This is what I am trying to do.

In the case of conventional hoists, the gear case must be removed to inspect for wear. The present invention eliminates this trouble by sequentially opening the locking devices provided at each stage starting from the lowest stage, detecting the wear of the gears at each stage based on the rotation angle of the modal pinion shaft, and reducing reparation by using an encoder. The number of pulses is converted into a number and compared with a predetermined number of pulses, and when the number of pulses is large, an abnormality is displayed or the main body of the hoist is stopped.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 6. As shown in FIG. 2, a small model 7, an encoder 8, and a locking device 15 are newly attached to the gears of each stage on the main shaft system. The output of the encoder 8 is connected to a counter circuit 9 inside the control device 29, and compared with a set value 12 by an arithmetic circuit 10, and a display 13 indicates whether it is normal or abnormal.

According to the flowcharts in Figures 4 and 5, Figures 3 and 6
The operation of the diagram will be explained.

First, the initial value setting operation will be explained. Switch 30 to L
Put it on the state side. When the power is turned on to start pack rate measurement, the memory and count of the control device 29 are reset, and the gear lock instruction for each stage is set to D4. , output from D5,
The relays 23 and 24 are driven, the lunoid is sucked, the gears of each stage are locked, and at the same time, the brake 6 is activated by the relay 24.
is released. Since the backlash is measured for each stage, 1 is first stored in the memory 5, and a backlash measuring circuit is created for the modal pinion and the first gear. A forward rotation instruction for the small mode 7 is output from D6, and the relay 25
is driven to rotate the small model 7 in the forward direction. In order to determine whether the rotation is forward or reverse, the H state is stored in the memory 1. Hereinafter, the H state will be expressed as H to represent high level, and the L state will be expressed as L to represent low level. The output from the encoder 8 is read and it is determined whether the change is from H to L or from L to H. If the change is from H to L, memory 1 is H.
Determine whether or not. If memory 1 is H, encoder 8
Return to reading the output. If the memory l is L, it counts and returns to reading the encoder output. Small model 7
However, when the rotor locks and stops after rotating a certain amount, H
The encoder 8 no longer changes from L to H or from L to H, and the encoder 8 maintains the H or L state depending on the stop position of the slit disk, and determines whether the memory 2 is H or not.
Do 1. If not, it is determined that the moder is locked, the forward rotation instruction from D6 is turned OFF, the relay 25 is turned OFF, and L is stored in the memory 1. H is stored in memory 2 in order to determine whether a reverse operation has been performed. Now, 1
The stage backlash measurement is now ready and the backlash will be measured during the next reversal operation. A reverse rotation instruction is output from D7, the relay 32 is driven, the small model 7 is operated in reverse, and the process returns to reading the output from the encoder 8. Since memory 1 is at L, when a change from H to L is detected, a count is performed and the state of memory 5 is checked. Since the memory 5 is 1 from the first stage backlash measurement, the count is stored in the memory 3 and the process returns to reading the output from the encoder.

In the case of a change from L to H, the process returns to reading the output from the encoder 8. When there is no change from L to H or from H to L, it is determined whether the memory 2 is Hd-. If H, a reverse rotation stop instruction is output from D7, the relay 32 is set to 0FFL, the reverse rotation operation is stopped, and the first stage backlash measurement is completed. It is determined whether memory 2 is 2 or not. If not, the first gear is unlocked, 1 is added to the contents of memory 5 and stored in memory 5, and memory 1. Reset memory 2.

Next, the circuit enters the second stage backlash measurement circuit. The backlash measurement operation is the same as the first stage measurement,
The difference is that the count is stored in memory 4 since memory 5 is 2.

When the second stage measurement is completed and the reversing circuit is turned off, the process proceeds to the determination of memory 5 and D9. Here memory 5 is 2
．． Also, from the measurements in the initial state, D9 is L, the first stage,
The number of pulses for the second stage backlash is output from the control device 29 to the display 18, the gear lock is released, the brake 6 is activated, and the initial value backlash measurement is completed. Here, the number of pulses for the second stage backlash is the number of pulses output from the encoder divided by the gear tooth ratio, and the number of pulses for the first stage backlash is subtracted.
This is carried out by 9 arithmetic circuits 10.

Next, the gear wear check operation will be explained using the flowcharts of FIGS. 4 and 5 and FIGS. 3 and 4.

A set pulse value obtained by adding the wear limit pulse to the number of pulses determined by the initial state measurement is inputted from the dip switch 22 to the control device 29 as the set value 12. To check gear wear, turn switch 30 to H and input to DIO. The packing crush measurement operation is the same as the initial state measurement, except that H is input to DIO, so the memory 3. A calculation circuit calculates the contents of memory 4.

Calculated with 10 and compared with set value 12, the calculated value becomes set value 1
If it is greater than 2, an abnormality display instruction is output from D8 and the light emitting diode 31 displays an abnormality.

If the calculated value is smaller than the set value 12, a normal display instruction is output from the DO and the light emitting diode 19 displays normally.

Next, a gear lock release instruction is output from D5, the relay 24 is turned off, the gear is released, the brake 6 is activated, and the gear wear check operation is completed.

According to the present invention, there are the following effects.

(1) There is an advantage that the wear inspection of the gear portion of each stage can be carried out easily and even when the main body of the hoisting machine is approached.

(2) Since the comparison is made with the set value in the initial state, wear detection errors due to device variations can be minimized.

According to the present invention, wear inspection of the gear part can be carried out easily and without getting close to the hoisting machine, so maintenance inspection can be easily carried out and accidents caused by not inspecting the machine can be prevented.

Furthermore, since the comparison is made with the initial state set value, wear detection errors due to device variations can be minimized, thereby increasing safety.

[Brief explanation of drawings]

Figure 1 is an overall configuration diagram of a conventional hoist, etc., Figure 2 is a detailed explanatory diagram of the present invention, Figure 3 is a diagram of the drum lock mechanism, and Figure 4 is a diagram of the drum lock mechanism.
5 shows a flowchart of the backlash measuring circuit of the present invention, and FIG. 6 shows a backlash measuring circuit diagram of the present invention. 1...Drum, 2...Wire rope, 3...Load block, 4...Reduction gear, 5...Hoisting mode, 6...Brooki, 7...Small mode , 8...
・Moncoder, 9...Pulse count circuit, 1o...
- Arithmetic circuit, 11... Preset circuit, 12... Setting pulse circuit, 13... Display, 14... Tension spring, 15... Gear lock device, 16... Solenoid, 17... Power supply, 18... Count display, 19...
・Light emitting diode, 2o...Resistor, 21...Transistor, 22...Dip switch, 23...Drive relay for 1st gear lock, 24...Drive relay for 2nd gear lock, 25...Small size IJ relay for modele normal rotation drive, 26... Comparator, 27... Phototransistor, 28... Variable resistor, 29... Control device, 3
0...Switch 1.31...Light emitting diode, 32
...Small model reverse drive relay, Vl...control device drive voltage pin 1, V2...control device drive voltage pin 2, DO...input pin from encoder □-der, Ro. ... dip switch 0 pin, ROI... dip switch pin 1, Ro2... dip switch pin 2, Ro3... dip switch pin 3, D4... 1
Output pin for stage gear lock, D5... Output pin for two stage gear lock, D6... Small model normal rotation output pin, D7
...Small model reverse output pin, D8...Abnormal display output pin, DO...Normal display output pin, OUT...
Count display output pin, Dlo...H, L changeover switch, 33...gear. 1st session 3rd UfU 4th session S

Claims (1)

[Claims] 1. In equipment with a reduction gear such as a hoist, a lock device is provided at each stage of the reduction gear, and the rotation angle of the modele pinion shaft is measured by an angle detector, and the backlash of the reduction gear is measured by the angle. The angle is detected by a detector,
Wear detection of a reduction gear, characterized in that, by comparison with a predetermined angle, when the rotation angle corresponding to the backlash is equal to or greater than the predetermined rotation angle, a display or a gear drive device is stopped. Device.