A method for adjusting the action speed of a speed limiting unit of a fall arrest safety device

Abstract

The application discloses a kind of action speed debugging method of fall arrest safety device speed limiting unit, it is related to fall arrest safety device rotating speed debugging technical field, and the debugging method is to adjust the axis of safety device speed limiting unit from initial vertical state to horizontal state, then, brake drum is sleeved on safety device speed limiting unit, then, speed reduction motor drives centrifugal mechanism on safety device speed limiting unit to rotate, until centrifugal flyweight on centrifugal mechanism is contacted with brake drum by being thrown out, to drive brake drum to rotate, the speed when centrifugal flyweight is contacted with brake drum is the action speed of safety device speed limiting unit, after each workpiece passes through all steps of the debugging method, the action speed of safety device speed limiting unit is automatically adjusted, manual operation is reduced, and operation efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of fall arrestor speed adjustment technology, specifically to a method for adjusting the operating speed of a fall arrestor speed limiting unit. Background Technology

[0002] The SAJ series fall arrestor for construction hoists is a crucial safety component. In the event of an accidental fall, when the descent speed reaches the fall arrestor's activation speed, it automatically engages the braking mechanism, stopping the cage on the guide rails. Therefore, the fall arrestor's activation speed is a critical parameter, and precise braking speed pre-adjustment is essential to ensure accuracy. Currently, with the advancement of intelligent manufacturing, existing speed adjustment methods for fall arrestors are insufficient for streamlined operations. Specifically, in streamlined operations, different components of the fall arrestor need to be switched between workstations to simulate actual operating conditions. This typically involves assembling the components onto a mounting platform, with manual handling of the platform for workstation switching. Existing manual speed adjustment methods suffer from low automation efficiency, and the accuracy of speed pre-adjustment differs from the safety device's braking performance testing results, failing to meet current production requirements. Therefore, improvements are needed. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to propose a method for adjusting the operating speed of the speed limiting unit of a fall arrestor, the specific solution of which is as follows: A method for adjusting the operating speed of a fall arrestor speed limiting unit is disclosed. The method involves adjusting the axis of the speed limiting unit from an initial vertical state to a horizontal state, then fitting a brake drum onto the speed limiting unit, followed by a reduction motor driving a centrifugal mechanism on the speed limiting unit to rotate until a centrifugal ball on the centrifugal mechanism is thrown out and contacts the brake drum, thereby driving the brake drum to rotate. The speed at which the centrifugal ball contacts the brake drum is the operating speed of the speed limiting unit.

[0004] Furthermore, the lifting and tilting mechanism is used to lift and tilt the axis of the safety device speed limiter unit from a vertical non-working state to a horizontal working state. After the commissioning is completed, the lifting and tilting mechanism will then tilt and lower the safety device speed limiter unit from a horizontal working state to a vertical non-working state.

[0005] Furthermore, a brake drum or a lightweight speed-regulating detection device with the same braking part as the brake drum is used as the action speed determination device for the safety device speed limiting unit. By determining whether the brake drum or the lightweight speed-regulating detection device is rotating or making a braking sound, the centrifugal block throwing action is determined.

[0006] Furthermore, during the debugging phase, the automatic assembly mechanism inserts the brake drum or the dedicated lightweight speed control testing device into the small shaft end of the safety device speed limiter unit. After the speed control is completed, the automatic assembly mechanism inserts the brake drum into the small shaft end of the safety device speed limiter unit.

[0007] Furthermore, the safety device speed limiting unit to be processed is set as the workpiece, and the debugging method is further detailed as follows: Step 1: The conveyor line transports the workpiece to the workpiece preparation position below the working position of the geared motor. At this time, the axis of the workpiece is in a vertical non-working state. Step 2: The initial position of the lifting and tilting mechanism is below the workpiece position in Step 1, and the axis of its reducer output shaft is in a vertical state; the lifting and tilting mechanism lifts the workpiece and brings it into contact with the output shaft of the reduction motor. At this time, the workpiece and the output shaft of the reduction motor are coaxial. Step 3: The clamping mechanism clamps the workpiece. Step 4: The lifting and tilting mechanism continues to rise while tilting the workpiece until the workpiece's axis is in a horizontal working state, at which point the equipment stops rising and tilting. Step 5: The automatic assembly mechanism will fit the brake drum or the speed-regulating lightweight testing device onto the small shaft end of the workpiece. Step six: The geared motor drives the workpiece to rotate to the operating speed; Step 7: After the workpiece reaches the operating speed, drive the brake drum or the speed-adjusting lightweight detection device to rotate or emit a braking sound, which is judged as the centrifugal throwing action in the workpiece. Step 8: Remove the brake drum or the dedicated lightweight speed control testing device; Step 9: Adjust the position of the preload spring according to the workpiece's movement speed, and correct the preload force accordingly. Step 10: Repeat steps 5 through 8 until the workpiece's movement speed meets the debugging requirements; Step 11: The lifting and tilting mechanism descends and tilts the workpiece at the same time, so that the axis of the workpiece is adjusted from a horizontal state to a vertical state. Step 12: The lifting and tilting mechanism continues to descend to the workpiece preparation position, and the clamping mechanism releases the workpiece. Step thirteen: The lifting and tilting mechanism continues to descend to the initial position, and the conveyor line transports the workpiece to the next station. This completes one debugging operation. Repeat steps one through thirteen to complete the next debugging session.

[0008] Furthermore, a speed monitoring sensor is installed on the geared motor.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: The lifting and tilting mechanism lifts and tilts the workpieces to be processed on the conveyor line in sequence. After each workpiece goes through all the steps of the adjustment method, the automatic adjustment of the speed limiting unit of the safety device is completed. During the entire adjustment process, the operator assembles the workpiece on the lifting and tilting mechanism or removes the workpiece from the lifting and tilting mechanism, reducing manual operation and improving work efficiency. In summary, the automated speed adjustment operation can also perform speed monitoring, pre-adjustment and other functions, improve the accuracy of the pre-adjusted action speed and reduce the possibility of errors in the safety device braking performance test results. Attached Figure Description

[0010] Figure 1 This is an overall schematic diagram of an embodiment of the present invention.

[0011] Reference numerals in the attached drawings: 1. Brake drum; 2. Safety device speed limiting unit; 3. Clamping mechanism; 4. Speed ​​monitoring sensor; 5. Gear motor; 6. Workpiece. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0013] Since the fall arrestor is a safety component of a construction hoist that prevents the cage from falling, its speed needs to be pre-adjusted before it is officially put into use on the market to ensure its effectiveness. In the existing technology, the speed adjustment is generally done manually, with workers moving the assembled speed limiting unit onto the installation platform for work position changes, which is time-consuming and labor-intensive. Therefore, this invention proposes a method for adjusting the operating speed of the fall arrestor's speed limiting unit 2.

[0014] The debugging method is essentially to adjust the axis of the safety device speed limiting unit 2 from the initial vertical state to the horizontal state. Then, the brake drum 1 is put onto the safety device speed limiting unit 2. Subsequently, the reduction motor 5 drives the centrifugal mechanism on the safety device speed limiting unit 2 to rotate until the centrifugal throwing block on the centrifugal mechanism is thrown out and contacts the brake drum 1, thereby driving the brake drum 1 to rotate and centrifuge.

[0015] The speed at which the sling block contacts the brake drum 1 is the operating speed of the safety device speed limiting unit 2.

[0016] In this embodiment, the centrifugal mechanism and centrifugal shovel block can refer to the necessary structures such as centrifugal seat, centrifugal shaft, and centrifugal block disclosed in the patent application number CN202010527198.4.

[0017] The speed adjustment method involves adjusting the relative position of the safety device speed limiting unit 2. To avoid manual intervention, the speed adjustment method of this invention further discloses that a lifting and flipping mechanism is used to lift and flip the axis of the safety device speed limiting unit 2 from a vertical non-working state to a horizontal working state. After adjustment, the lifting and flipping mechanism then flips and lowers the safety device speed limiting unit 2 from a horizontal working state back to a vertical non-working state. Therefore, the safety device speed limiting unit 2 undergoes a positional change in the vertical direction, and simultaneously, it undergoes a flipping motion in the horizontal direction, facilitating its insertion into the brake drum 1 and contact with the reduction motor 5 in the horizontal direction.

[0018] The aforementioned lifting and tilting mechanism consists of a structure capable of reciprocating motion in the vertical direction and a structure capable of rotating in both directions around the same axis.

[0019] In this embodiment, a brake drum 1 or a lightweight speed-regulating detection device with the same braking part as the brake drum 1 is used as the action speed determination device for the safety device speed limiting unit 2. The centrifugal throwing action is determined by detecting the rotation of the brake drum 1 or the braking sound emitted by the lightweight speed-regulating detection device. This method can quickly alert the operator. When the operator sees the rotation or hears the braking sound, they know that the safety device speed limiting unit 2 has reached the action speed. Correspondingly, a speed monitoring sensor 4 is installed on the reduction motor 5. The specific action speed value can be obtained by converting the value of the speed monitoring sensor 4. The operator can then compare it with the debugging requirements to determine whether the debugging is completed or to continue debugging.

[0020] To improve the automation of this debugging method, the present invention uses an automatic assembly mechanism to fit the brake drum 1 or a lightweight speed-adjusting detection device onto the small shaft end of the safety device speed-limiting unit 2 during the debugging process. After speed adjustment is completed, the automatic assembly mechanism fits the brake drum 1 onto the small shaft end of the safety device speed-limiting unit 2. The automatic assembly mechanism can be a robotic arm or similar intelligent mechanism, which not only automatically assembles and tests the brake drum 1 during the debugging process, but also saves time in assembling the standard brake drum 1 for subsequent fall arrestor assembly operations.

[0021] In actual production, after the fall arrestor speed limiting unit 2 is produced, it enters the conveyor line. Since the fall arrestor speed limiting unit 2 has a large-diameter disc structure in the middle and a small-diameter cylindrical structure at the bottom, to ensure stability during transport, the fall arrestor speed limiting unit 2 is stably placed on the conveyor line by its bottom. At this time, the initial state of the axis of the fall arrestor speed limiting unit 2 is vertical. However, the operation of fitting the brake drum 1 vertically and controlling the brake drum 1 to move away from or towards the fall arrestor speed limiting unit 2 has poor flexibility and high requirements for the working environment. Therefore, through creative effort, this invention sets the axis of the fall arrestor speed limiting unit 2 to switch from a vertical state to a horizontal state. For ease of description, the safety device speed limiting unit 2 to be processed on the conveyor line is referred to as workpiece 6. Figure 1 The debugging method is further detailed as follows: Step 1: The conveyor line transports workpiece 6 to the workpiece preparation position below the working position 5 of the geared motor. At this time, the axis of workpiece 6 is in a vertical non-working state. Step 2: The initial position of the lifting and tilting mechanism is below the workpiece position in Step 1, and the axis of its reducer output shaft is in a vertical state; the lifting and tilting mechanism rises until the output shaft of the reducer motor contacts the workpiece 6. At this time, the workpiece and the output shaft of the reducer motor are coaxial; Step 3: The clamping mechanism 3 clamps the workpiece 6; Step 4: The lifting and tilting mechanism continues to rise and tilt the workpiece 6 until the axis of the workpiece 6 is in the horizontal working state shown in Figure 2, and the equipment stops rising and tilting. Step 5: The automatic assembly mechanism places the brake drum 1 or the speed-regulating lightweight detection device onto the small shaft end of the workpiece 6; Step 6: The reduction motor 5 drives the workpiece 6 to rotate to the operating speed. Step 7: After the workpiece 6 reaches the operating speed, drive the brake drum 1 or the speed-regulating lightweight detection device to rotate or emit a braking sound, which is judged as the centrifugal throwing action in the workpiece 6; Step 8: Exit the brake drum 1 or the speed-regulating lightweight detection device. Step 9: Adjust the position of the preload spring according to the movement speed of workpiece 6, and correct the preload force accordingly; Step 10: Repeat steps 5 to 8 until the movement speed of workpiece 6 meets the debugging requirements. Step 11: The lifting and tilting mechanism descends and simultaneously tilts workpiece 6, so that the axis of workpiece 6 is adjusted from a horizontal state to a vertical state. Step 12: The lifting and tilting mechanism continues to descend to the workpiece preparation position, and the clamping mechanism 3 releases the workpiece 6; Step 13: The lifting and tilting mechanism continues to descend to the initial position, and the conveyor line transports the workpiece to the next station. Thus, one debugging operation is completed.

[0022] Repeat steps one through thirteen to complete the next debugging session.

[0023] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method of adjusting the action speed of a speed limiting unit of a fall arrestor, characterized by, The debugging method is to adjust the axis of the safety device speed limiting unit from the initial vertical state to the horizontal state, then put the brake drum on the safety device speed limiting unit, and then drive the centrifugal mechanism on the safety device speed limiting unit to rotate until the centrifugal throwing block on the centrifugal mechanism is thrown out and contacts the brake drum, thereby driving the brake drum to rotate. The speed at which the centrifugal throwing block contacts the brake drum is the operating speed of the safety device speed limiting unit. The speed limit unit of the safety device is determined by using a brake drum or a lightweight speed-regulating detection device that is consistent with the brake drum. The centrifugal throwing action is determined by detecting whether the brake drum or the lightweight speed-regulating detection device is rotating or makes a braking sound. When in the debugging state, the automatic assembly mechanism will put the brake drum or the speed regulation lightweight testing device into the small shaft end of the safety device speed limiter unit. After the speed regulation is completed, the automatic assembly mechanism will put the brake drum into the small shaft end of the safety device speed limiter unit. The safety device speed limiting unit to be processed is set as the workpiece, and the debugging method is further described below: Step 1: The conveyor line transports the workpiece to the workpiece preparation position below the working position of the geared motor. At this time, the axis of the workpiece is in a vertical non-working state. Step 2: The initial position of the lifting and tilting mechanism is below the workpiece position in Step 1, and the axis of its reducer output shaft is in a vertical state; the lifting and tilting mechanism lifts the workpiece and brings it into contact with the output shaft of the reduction motor. At this time, the workpiece and the output shaft of the reduction motor are coaxial. Step 3: The clamping mechanism clamps the workpiece. Step 4: The lifting and tilting mechanism continues to rise while tilting the workpiece until the workpiece's axis is in a horizontal working state, at which point the equipment stops rising and tilting. Step 5: The automatic assembly mechanism will fit the brake drum or the speed-regulating lightweight testing device onto the small shaft end of the workpiece. Step six: The geared motor drives the workpiece to rotate to the operating speed; Step 7: After the workpiece reaches the operating speed, drive the brake drum or the speed-adjusting lightweight detection device to rotate or emit a braking sound, which is judged as the centrifugal throwing action in the workpiece. Step 8: Remove the brake drum or the dedicated lightweight speed control testing device; Step 9: Adjust the position of the preload spring according to the workpiece's movement speed, and correct the preload force accordingly. Step 10: Repeat steps 5 through 8 until the workpiece's movement speed meets the debugging requirements; Step 11: The lifting and tilting mechanism descends and tilts the workpiece at the same time, so that the axis of the workpiece is adjusted from a horizontal state to a vertical state. Step 12: The lifting and tilting mechanism continues to descend to the workpiece preparation position, and the clamping mechanism releases the workpiece. Step thirteen: The lifting and tilting mechanism continues to descend to the initial position, and the conveyor line transports the workpiece to the next station. This completes one debugging operation. Repeat steps one through thirteen to complete the next debugging session.

2. The method of claim 1, wherein the method is characterized by: The lifting and tilting mechanism is used to lift and tilt the axis of the safety device speed limiter unit from a vertical non-working state to a horizontal working state. After the commissioning is completed, the lifting and tilting mechanism will then tilt and lower the safety device speed limiter unit from a horizontal working state to a vertical non-working state.

3. The method of adjusting the operating speed of a speed limiting unit of a fall arrestor according to claim 1, wherein The geared motor is equipped with a speed monitoring sensor.

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