Anti-falling lifting mechanism

Abstract

The utility model relates to the technical field of stackers, in particular to an anti-falling lifting mechanism, which comprises a frame, a first driven wheel and a second driven wheel. The driving motor is installed on the frame, and a transmission shaft of the driving motor is provided with a first driving wheel and a second driving wheel; the first driving belt surrounds the first driving wheel and the first driven wheel, and the second driving belt surrounds the second driving wheel and the second driven wheel; the lifting plate is fixedly connected with the first driving belt and the second driving belt, and the driving motor drives the lifting plate to ascend and descend through the first driving belt and the second driving belt; and the broken belt detection device is connected with the first driving belt and the second driving belt, and the broken belt detection device is used for detecting whether the first driving belt and the second driving belt are broken or not.

Description

Technical Field

[0001] The utility model relates to the technical field of stackers, and particularly relates to a fall-preventing lifting mechanism. Background Art

[0002] In the existing lifting mechanism technology, the drive belt is a key component, and its integrity is crucial for ensuring the safe operation of the lifting mechanism. However, due to long-term use or other external factors, the drive belt may break, resulting in the failure of the lifting mechanism or causing safety accidents. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a fall-preventing lifting mechanism, aiming to solve the problems that the drive belt breaks, resulting in the failure of the lifting mechanism or causing safety accidents.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] A fall-preventing lifting mechanism, comprising:

[0006] A frame, on which a first driven wheel and a second driven wheel are installed;

[0007] A driving motor, which is installed on the frame, and a first driving wheel and a second driving wheel are provided on the transmission shaft of the driving motor;

[0008] A first drive belt and a second drive belt, the first drive belt is wound around the first driving wheel and the first driven wheel, and the second drive belt is wound around the second driving wheel and the second driven wheel;

[0009] A lifting plate, which is fixedly connected to the first drive belt and the second drive belt, and the driving motor drives the lifting plate to lift through the first drive belt and the second drive belt;

[0010] A broken belt detection device, which is respectively connected to the first drive belt and the second drive belt, and is used for detecting whether the first drive belt and the second drive belt are broken.

[0011] Further, the first end of the first drive belt is fixedly connected to the lifting plate through a fixing member, and the second end of the first drive belt is fixedly connected to the lifting plate through the fixing member; the first end of the second drive belt is fixedly connected to the lifting plate through the fixing member, and the second end of the second drive belt is fixedly connected to the lifting plate through the fixing member.

[0012] Further, both the first drive belt and the second drive belt include a drive belt body and an insulating skin. The drive belt body is made of multiple steel wires braided together, and the insulating skin covers the drive belt body.

[0013] Further, the belt break detection device includes: a safety relay, a reset switch, a warning light, a first contactor, and a second contactor; the X1 pin of the safety relay is electrically connected to the first end of the auxiliary contact of the second contactor, the second end of the auxiliary contact of the second contactor is electrically connected to the first end of the auxiliary contact of the first contactor, the second end of the auxiliary contact of the first contactor is electrically connected to the first end of the reset switch, and the second end of the reset switch is electrically connected to the positive pole of the 24V power supply; the Y1 pin of the safety relay is electrically connected to the first end of the warning light, the second end of the warning light is electrically connected to the negative pole of the 24V power supply; the T1 pin of the safety relay is electrically connected to the first end of the first drive belt, and the R1 pin of the safety relay is electrically connected to the second end of the first drive belt; the T2 pin of the safety relay is electrically connected to the first end of the second drive belt, and the R2 pin of the safety relay is electrically connected to the second end of the second drive belt; the A1, A2, and 13 pins of the safety relay are electrically connected to the positive pole of the 24V power supply; the 13 pin of the safety relay is electrically connected to the positive pole of the 24V power supply, the 14 pin of the safety relay is connected in parallel with the first end of the coil of the first contactor and the first end of the coil of the second contactor, and the second end of the coil of the first contactor and the second end of the coil of the second contactor are electrically connected to the positive pole of the 24V power supply.

[0014] Further, the lifting plate is provided with two avoidance holes. The first end of the first drive belt is fixed above the left avoidance hole through a fixing member, and the second end of the first drive belt is fixed below the left avoidance hole through a fixing member; the first end of the second drive belt is fixed above the right avoidance hole through a fixing member, and the second end of the second drive belt is fixed below the right avoidance hole through a fixing belt.

[0015] The beneficial effects of the anti-falling lifting mechanism described in the present utility model are as follows:

[0016] The driving motor of the anti-falling lifting mechanism drives the lifting plate to lift through the first driving belt and the second driving belt. Therefore, in order to be able to timely determine whether the first driving belt or the second driving belt is broken, a belt break detection device is respectively connected to the first driving belt and the second driving belt. When the first driving belt or the second driving belt is broken, the current passing through the first driving belt or the second driving belt will change. The belt break detection device can judge whether the first driving belt and the second driving belt are broken according to the change in current, so as to timely remind the staff to replace the driving belt, avoiding the failure of the lifting mechanism or causing safety accidents. Description of the Drawings

[0017] Figure 1 is the overall structural schematic diagram of the anti-falling lifting mechanism of the embodiment of the present invention;

[0018] Figure 2 is the circuit schematic diagram of the connection between the belt break detection device, the first driving belt and the second driving belt of the embodiment of the present invention.

[0019] Description of the Reference Numerals:

[0020] 1. Frame; 11. First driven wheel; 12. Second driven wheel; 2. Driving motor; 21. Transmission shaft; 22. First driving wheel; 23. Second driving wheel; 31. First driving belt; 32. Second driving belt; 4. Lifting plate; 5. Belt break detection device. Detailed Embodiment

[0021] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0022] As Figure 1 shown, an anti-falling lifting mechanism provided by the present invention includes:

[0023] Frame 1, on which a first driven wheel 11 and a second driven wheel 12 are installed;

[0024] Driving motor 2, installed on frame 1, and a first driving wheel 22 and a second driving wheel 23 are provided on the transmission shaft 21 of driving motor 2;

[0025] First driving belt 31 and second driving belt 32, the first driving belt 31 is wound around the first driving wheel 22 and the first driven wheel 11, and the second driving belt 32 is wound around the second driving wheel 23 and the second driven wheel 12;

[0026] Lifting plate 4, which is fixedly connected to the first driving belt 31 and the second driving belt 32, and the driving motor 2 drives the lifting plate 4 to lift through the first driving belt 31 and the second driving belt 32;

[0027] The belt breakage detection device 5 is respectively connected to the first drive belt 31 and the second drive belt 32, and the belt breakage detection device 5 is used to detect whether the first drive belt 31 and the second drive belt 32 are broken.

[0028] The drive motor 2 of the anti-falling lifting mechanism drives the lifting plate 4 to lift through the first drive belt 31 and the second drive belt 32. Therefore, in order to be able to timely judge whether the first drive belt 31 or the second drive belt 32 is broken, the belt breakage detection device 5 is respectively connected to the first drive belt 31 and the second drive belt 32. When the first drive belt 31 or the second drive belt 32 is broken, the current passing through the first drive belt 31 or the second drive belt 32 will change. The belt breakage detection device 5 can judge whether the first drive belt 31 and the second drive belt 32 are broken according to the change of the current, so as to timely remind the staff to replace the drive belt, avoiding the failure of the lifting mechanism or causing a safety accident.

[0029] Further, the first end of the first drive belt 31 is fixedly connected to the lifting plate 4 through a fixing member, and the second end of the first drive belt 31 is fixedly connected to the lifting plate 4 through a fixing member; the first end of the second drive belt 32 is fixedly connected to the lifting plate 4 through a fixing member, and the second end of the second drive belt 32 is fixedly connected to the lifting plate 4 through a fixing member. Therefore, the first drive belt 31 and the second drive belt 32 are closed on the lifting plate 4. When the drive motor 2 rotates forward, the lifting plate 4 can be driven to rise through the first drive belt 31 and the second drive belt 32. When the drive motor 2 rotates reversely, the lifting plate 4 can be driven to descend through the first drive belt 31 and the second drive belt 32.

[0030] Further, both the first drive belt 31 and the second drive belt 32 include a drive belt body and an insulating skin. The drive belt body is made of multiple steel wires woven together, and the insulating skin covers the drive belt body.

[0031] Since the drive belt body is made of multiple steel wires woven together, in order to avoid electric leakage caused by the direct contact between the drive belt body and the lifting plate 4, an insulating skin is covered on the surface of the drive belt body. At the same time, the setting of the insulating skin can also strengthen the friction between the drive belt and the driving wheel and the driven wheel.

[0032] Such as Figure 2As shown in the figure, the belt break detection device 5 includes: a safety relay, a reset switch, a warning light, a first contactor, and a second contactor; the X1 pin of the safety relay is electrically connected to the first end of the auxiliary contact of the second contactor, the second end of the auxiliary contact of the second contactor is electrically connected to the first end of the auxiliary contact of the first contactor, the second end of the auxiliary contact of the first contactor is electrically connected to the first end of the reset switch, and the second end of the reset switch is electrically connected to the positive pole of the 24V power supply; the Y1 pin of the safety relay is electrically connected to the first end of the warning light, and the second end of the warning light is electrically connected to the negative pole of the 24V power supply; the T1 pin of the safety relay is electrically connected to the first end of the first drive belt 31, and the R1 pin of the safety relay is electrically connected to the second end of the first drive belt 31; the T2 pin of the safety relay is electrically connected to the first end of the second drive belt 32, and the R2 pin of the safety relay is electrically connected to the second end of the second drive belt 32; the A1, A2, and 13 pins of the safety relay are electrically connected to the positive pole of the 24V power supply; the 13 pin of the safety relay is electrically connected to the positive pole of the 24V power supply, the 14 pin of the safety relay is connected in parallel with the first end of the coil of the first contactor and the first end of the coil of the second contactor, and the second end of the coil of the first contactor and the second end of the coil of the second contactor are electrically connected to the positive pole of the 24V power supply.

[0033] The safety relay can only be started when it detects that both the first drive belt 31 and the second drive belt 32 are in an unbroken state. And when the feedback loop detects that the auxiliary contacts of the control contactors KA1 and KA2 are also in a closed state. After pressing the reset switch, the safety module is started, the power supply is turned on, and the warning light lights up. When there is a break in the first drive belt 31 and the second drive belt 32, the internal logic of the safety relay detects a change in the input state, its output is instantaneously disconnected, the control contactor coil loses power, the main circuit is disconnected, the power supply is open, and the anti-fall lifting mechanism stops, and at the same time the warning light is turned off, so as to timely remind the staff to replace the drive belt, avoiding the failure of the lifting mechanism or causing a safety accident.

[0034] Furthermore, the lifting plate 4 is provided with two avoidance holes. The first end of the first drive belt 31 is fixed above the left avoidance hole through a fixing member, and the second end of the first drive belt 31 is fixed below the left avoidance hole through a fixing member; the first end of the second drive belt 32 is fixed above the right avoidance hole through a fixing member, and the second end of the second drive belt 32 is fixed below the right avoidance hole through a fixing belt.

[0035] The end faces of the first end and the second end of the first drive belt 31 are not covered by an insulating skin. At the same time, the end faces of the first end and the second end of the second drive belt 32 are not covered by an insulating skin. The T1 pin of the safety relay is electrically connected to the end face of the first end of the first drive belt 31, the R1 pin of the safety relay is electrically connected to the end face of the second end of the first drive belt 31, the T2 pin of the safety relay is electrically connected to the end face of the first end of the second drive belt 32, and the R2 pin of the safety relay is electrically connected to the end face of the second end of the second drive belt 32. Moreover, the electrical connection between the safety relay and the first drive belt 31 and the second drive belt 32 is made through leads passing through the avoidance holes.

[0036] The above description is only a preferred embodiment of the present invention, and does not impose any limitation on the technical scope of the present invention. Therefore, any minor modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A fall prevention lifting mechanism, characterized in that, Including: A frame, on which a first driven wheel and a second driven wheel are installed; A driving motor, which is installed on the frame, and a first driving wheel and a second driving wheel are provided on the transmission shaft of the driving motor; A first driving belt and a second driving belt, the first driving belt is wound around the first driving wheel and the first driven wheel, and the second driving belt is wound around the second driving wheel and the second driven wheel; A lifting plate, which is fixedly connected to the first driving belt and the second driving belt, and the driving motor drives the lifting plate to lift through the first driving belt and the second driving belt; A belt break detection device, which is respectively connected to the first driving belt and the second driving belt, and is used to detect whether the first driving belt and the second driving belt are broken.

2. The anti-falling lifting mechanism according to claim 1, wherein The first end of the first driving belt is fixedly connected to the lifting plate through a fixing member, and the second end of the first driving belt is fixedly connected to the lifting plate through the fixing member; the first end of the second driving belt is fixedly connected to the lifting plate through the fixing member, and the second end of the second driving belt is fixedly connected to the lifting plate through the fixing member.

3. The anti-falling lifting mechanism according to claim 2, characterized in that, Both the first driving belt and the second driving belt include a driving belt body and an insulating skin, the driving belt body is made of multiple steel wires braided, and the insulating skin covers the driving belt body.

4. The anti-falling lifting mechanism according to claim 3, characterized in that, The belt break detection device includes: a safety relay, a reset switch, a warning light, a first contactor and a second contactor; the X1 pin of the safety relay is electrically connected to the first end of the auxiliary contact of the second contactor, the second end of the auxiliary contact of the second contactor is electrically connected to the first end of the auxiliary contact of the first contactor, the second end of the auxiliary contact of the first contactor is electrically connected to the first end of the reset switch, and the second end of the reset switch is electrically connected to the positive pole of the 24V power supply; the Y1 pin of the safety relay is electrically connected to the first end of the warning light, and the second end of the warning light is electrically connected to the negative pole of the 24V power supply; the T1 pin of the safety relay is electrically connected to the first end of the first driving belt, and the R1 pin of the safety relay is electrically connected to the second end of the first driving belt; the T2 pin of the safety relay is electrically connected to the first end of the second driving belt, and the R2 pin of the safety relay is electrically connected to the second end of the second driving belt; the A1, A2, and 13 pins of the safety relay are electrically connected to the positive pole of the 24V power supply; the 13 pin of the safety relay is electrically connected to the positive pole of the 24V power supply, the 14 pin of the safety relay is connected in parallel with the first end of the coil of the first contactor and the first end of the coil of the second contactor, and the second end of the coil of the first contactor and the second end of the coil of the second contactor are electrically connected to the positive pole of the 24V power supply.

5. The anti-falling lifting mechanism according to claim 2, wherein, The lifting plate is provided with two avoidance holes. The first end of the first driving belt is fixed to the upper side of the left avoidance hole through a fixing member, and the second end of the first driving belt is fixed to the lower side of the left avoidance hole through a fixing member; the first end of the second driving belt is fixed to the upper side of the right avoidance hole through a fixing member, and the second end of the second driving belt is fixed to the lower side of the right avoidance hole through a fixing belt.

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