Construction hoist based on obstacle detection protection function

Abstract

The application relates to an elevator, in particular to a construction elevator based on an obstacle detection protection function. The elevator comprises a base, a guide rail frame, a lifting frame, a speed reducer, a cage, sliding doors, a driver and a guardrail, the base is provided with the guide rail frame, the lifting frame is installed on the guide rail frame, the speed reducer is arranged on the lifting frame, the cage is connected to the bottom of the lifting frame, the cage is provided with the sliding doors and the driver for controlling the opening and closing of the sliding doors, the guardrail is installed on the top of the cage, the application further comprises an obstacle detection mechanism, the obstacle detection mechanism comprises a flat contact plate, a first angle sensor, a second angle sensor and a controller, the flat contact plate is movably installed on the top of the guardrail, the top of the lifting frame and the bottom of the cage, the application realizes accurate identification of different types of obstacles through the obstacle detection mechanism, solves the problem that the limiting device of the existing elevator can only respond to the fixed position and cannot identify the obstacles on the non-pre-set path, and meets the safety requirement under the complex working condition.

Description

Technical Field

[0001] This invention relates to a hoist, and more particularly to a construction hoist based on obstacle detection and protection functions. Background Technology

[0002] Construction hoists, as crucial vertical transportation equipment on construction sites, are widely used in high-rise and super high-rise building projects. With increasingly complex building structures, the operating environment faced by hoists during operation is becoming more varied. Especially during the vertical movement of the cage, obstacles such as scaffolding, external formwork, and temporary protective structures are frequently encountered. If these obstacles are not identified and addressed in a timely manner, they can easily lead to collisions, causing equipment damage or even personal injury.

[0003] While existing construction hoists are generally equipped with safety protection devices such as limit switches and emergency braking systems, they still have significant shortcomings in dynamic obstacle detection. For example, traditional limit devices can only respond to fixed positions and cannot identify obstacles outside the preset path, making it difficult to meet the safety requirements under complex working conditions. Summary of the Invention

[0004] To overcome the shortcomings of traditional mechanical limit devices that can only respond to fixed positions and cannot identify obstacles on non-preset paths, this invention provides a construction hoist based on obstacle detection and protection functions.

[0005] The technical implementation of this invention is as follows: a construction hoist based on obstacle detection and protection function, comprising a base, a guide rail frame, a lifting frame, a decelerator, a cage, sliding doors, a driver, and guardrails. The base is provided with a guide rail frame, the lifting frame is installed on the guide rail frame, the decelerator is provided on the lifting frame, the cage is connected to the bottom of the lifting frame, sliding doors and drivers for controlling their opening and closing are provided on both sides of the cage, and guardrails are installed on the top of the cage. It also includes an obstacle detection mechanism, which includes a flat contact plate, a first angle sensor, a second angle sensor, and a controller. Flat contact plates are movably installed on the top of the guardrail, the top of the lifting frame, and around the bottom of the cage. The first angle sensor is installed on the flat contact plate above the cage, and the second angle sensor is installed on the flat contact plate below the cage. The controller is installed on the lifting frame and is electrically connected to the first angle sensor, the second angle sensor, and the decelerator. When the flat contact plate contacts an obstacle, the angle sensor detects the angle change and transmits a signal to the controller. After the controller determines that an obstacle exists, it controls the decelerator to stop operating.

[0006] In a preferred embodiment of the present invention, the obstacle detection mechanism further includes an alarm. The alarm is installed on the top of the cage and is electrically connected to the controller. After the controller determines that an obstacle exists, it simultaneously activates the alarm to issue an alarm.

[0007] In a preferred embodiment of the present invention, the obstacle detection mechanism further includes bushings, rotating shafts, torsion springs, bevel gear sets, discs, and connecting rods. Bushings are installed around the top of the guardrail, the top of the lifting frame, and the bottom of the cage. Rotating shafts are rotatably connected inside the bushings. Flat contact plates are connected to the rotating shafts. Torsion springs are connected between the flat contact plates and the bushings. Adjacent rotating shafts are synchronously driven by bevel gear sets. The rotating shafts on the guardrail and the rotating shafts on the lifting frame are synchronously driven by discs and connecting rods. The rotating shaft on the lifting frame is connected to a first angle sensor, and the rotating shaft at the bottom of the cage is connected to a second angle sensor.

[0008] In a preferred embodiment of the present invention, the obstacle detection mechanism further includes an inclined contact plate, with the inclined contact plate provided on the top of the flat contact plate, and the inclined contact plate being inclined upward from the flat contact plate and inclined towards the inside of the cage.

[0009] In a preferred embodiment of the present invention, a pushing mechanism is further included. The pushing mechanism includes a telescopic rod, a propulsion motor, a connecting plate, a push rod, and a slide rail. The top of the flat contact plate is connected to the telescopic rod, the free end of the telescopic rod is connected to the inclined contact plate, the propulsion motor is mounted on the flat contact plate, the output shaft of the propulsion motor is connected to the connecting plate, the push rod is connected to the connecting plate, the bottom of the inclined contact plate is connected to the slide rail, the push rod slides in cooperation with the slide rail, and the propulsion motor is electrically connected to the controller.

[0010] In a preferred embodiment of the present invention, a clamping mechanism is further included. The clamping mechanism includes a U-shaped block, a clamping plate, a servo motor, and a screw. The U-shaped block is installed on the lifting frame, and the clamping plate is provided inside the U-shaped block. A connecting rod is located between the U-shaped block and the clamping plate. The servo motor is installed on the U-shaped block, and the screw is connected to the output shaft of the servo motor. The screw is threadedly connected to the clamping plate, and the servo motor is electrically connected to the controller.

[0011] In a preferred embodiment of the present invention, the device further includes a geared motor, a limit lever, and a limit wheel. The limit wheel is connected to the rotating shaft at the bottom of the cage. A geared motor is installed at the bottom of the cage. The output shaft of the geared motor is connected to the limit lever. The limit lever cooperates with the limit wheel. The geared motor is electrically connected to the controller.

[0012] In a preferred embodiment of the present invention, a protective mechanism is also included. The protective mechanism includes a limit rod, a bracket, a rotating rod, a U-shaped sleeve, and a triggering component. The lower part of the sliding door is connected to the limit rod, and the bottom of the cage is connected to the bracket. Each bracket is rotatably connected to a rotating rod, and a U-shaped sleeve for locking the limit rod is connected to the rotating rod. A triggering component is installed between the bracket, the rotating rod, and the base.

[0013] In a preferred embodiment of the present invention, the triggering assembly includes a rack, a trigger rod, a cylindrical gear, a slide rod, a spring, a guide sleeve, and a blocking plate. The guide sleeve is connected to the bracket, and the rack and the slide rod are slidably connected to the guide sleeve. A spring is connected between the guide sleeve and the slide rod, and the spring is sleeved on the slide rod. A cylindrical gear is connected to the rotating rod, and the cylindrical gear meshes with the rack. A blocking plate is connected to the base.

[0014] In a preferred embodiment of the present invention, the obstacle detection mechanism further includes a first light curtain and a second light curtain. The first light curtain is provided on the upper part of the fence, and the second light curtain is provided around the cage. Both the first light curtain and the second light curtain are electrically connected to the controller.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The present invention achieves accurate identification of different types of obstacles through the obstacle detection mechanism, which solves the problem that the limit device of the existing elevator can only respond to fixed positions and cannot identify obstacles on non-preset paths, making it difficult to meet the safety requirements under complex working conditions.

[0016] 2. The ejection mechanism enables the automatic removal of short obstacles, avoiding the problem of prolonged elevator downtime due to minor obstacles, which affects work efficiency.

[0017] 3. The clamping mechanism and limit lever lock the rotating parts, avoiding the problem of the contact plate deflecting due to external force during the ejection process.

[0018] 4. The sliding door linkage limit mechanism enables automatic locking of the sliding door in high-altitude conditions, avoiding safety accidents caused by accidental opening of the sliding door during high-altitude operations, which could lead to personnel or goods falling. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the fence and base of the present invention.

[0021] Figure 3 This is a three-dimensional structural diagram of the cage of the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the guardrail and alarm device of the present invention.

[0023] Figure 5 for Figure 4 A schematic diagram of the structure of part A.

[0024] Figure 6 This is a partial structural schematic diagram of the obstacle detection mechanism of the present invention.

[0025] Figure 7This is a three-dimensional structural diagram of the ejection mechanism of the present invention.

[0026] Figure 8 This is a three-dimensional structural diagram of the clamping mechanism and connecting rod of the present invention.

[0027] Figure 9 This is a partial structural schematic diagram of the clamping mechanism of the present invention.

[0028] Figure 10 This is a three-dimensional structural diagram of the cage of the present invention in an inverted state.

[0029] Figure 11 for Figure 10 A schematic diagram of the structure of part B.

[0030] Figure 12 for Figure 10 A structural diagram of part C.

[0031] Figure 13 This is a three-dimensional structural diagram of the protective mechanism of the present invention in an inverted state.

[0032] The above-mentioned attached drawings include the following reference numerals: 1. Fence, 2. Base, 3. Guide rail frame, 4. Wall mount, 5. Lifting frame, 6. Reducer lift, 7. Cage, 71. Sliding door, 72. Driver, 8. Guardrail, 9. Obstacle detection mechanism, 90. Alarm, 91. Bushing, 92. Rotating shaft, 93. Flat contact plate, 94. Torsion spring, 95. Bevel gear set, 96. Disc, 97. Connecting rod, 98. First angle sensor, 99. Controller, 10. Inclined contact plate, 11. Pushing mechanism, 111. Telescopic rod, 112. Propulsion motor, 113. Connecting plate, 114. Push rod, 115. Slide rail, 12 121. Clamping mechanism; 122. U-shaped block; 123. Clamping plate; 124. Rubber plate; 125. Servo motor; 126. Screw; 127. Guide rod; 13. Second angle sensor; 141. Gear motor; 142. Limiting lever; 143. Limiting grooved wheel; 15. Protective mechanism; 151. Limiting rod; 152. Bracket; 153. Rotating rod; 154. U-shaped sleeve; 155. Trigger assembly; 1551. Rack; 1552. Trigger rod; 1553. Cylindrical gear; 1554. Slide rod; 1555. Spring; 1556. Guide sleeve; 1557. Blocking plate; 16. First light curtain; 17. Second light curtain. Detailed Implementation

[0033] A construction hoist based on obstacle detection and protection function, such as Figures 1-13As shown, the system includes a fence 1, a base 2, a guide rail frame 3, a wall-mounted frame 4, a lifting frame 5, a speed reducer 6, a cage 7, a sliding door 71, a drive unit 72, a guardrail 8, and an obstacle detection mechanism 9. The base 2 has a cross-shaped structure and is firmly installed on the ground with anchor bolts. The guide rail frame 3 is bolted to the top of the base 2. The guide rail frame 3 is composed of multiple standard sections, providing good stability and expandability. The fence 1 is installed on the outside of the base 2 to prevent people or objects from approaching the elevator foundation area, serving as a safety isolation function. The guide rail frame 3 is reliably connected to the building structure through the wall-mounted frame 4 to enhance the stability of the elevator during operation. The guide rail frame 3 has sliding supports on both the front and rear sides. The system is equipped with a lifting frame 5, on which a reduction gear 6 is mounted as the power and transmission device for lifting and lowering, enabling the lifting frame 5 to rise and fall smoothly along the guide rail frame 3. A cage 7 is installed at the bottom of the lifting frame 5, and sliding doors 71 are slidably connected to both sides of the cage 7. A driver 72 for opening and closing the sliding doors 71 is installed at the top of the cage 7. A guardrail 8 is installed at the top of the cage 7. Obstacle detection mechanisms 9 are installed on both the upper and lower sides of the cage 7, enabling real-time detection of surrounding obstacles during lifting and lowering, thereby improving the safety of equipment operation. The upper obstacle detection mechanism 9 is installed on the top of the guardrail 8 and the top of the lifting frame 5, while the lower obstacle detection mechanism 9 is installed on the top of the guardrail 8 and the top of the lifting frame 5. The detection mechanism 9 is installed at the bottom of the cage 7. The obstacle detection mechanism 9 includes an alarm 90, a bushing 91, a rotating shaft 92, a flat contact plate 93, a torsion spring 94, a bevel gear set 95, a disc 96, a connecting rod 97, a first angle sensor 98, a second angle sensor 13, and a controller 99. Bushings 91 are installed around the top of the guardrail 8, the top of the lifting frame 5, and the bottom of the cage 7. The rotating shaft 92 is rotatably connected inside the bushing 91. The flat contact plate 93 is connected to the rotating shaft 92 for contacting potential obstacles. The torsion spring 94 connects the flat contact plate 93 to the bushing 91 to provide a restoring force. Adjacent rotating shafts 92 are connected via the bevel gear set 95. The guardrail 8 has a rotating shaft 92 near the lifting frame 5, and the lifting frame 5 has a rotating shaft 92 connected to a disc 96. The two discs 96 are connected at their eccentric points by a connecting rod 97. The first angle sensor 98 is connected to the outside of the rotating shaft 92 on the lifting frame 5 to detect the rotation angle of the rotating shaft 92. The bottom of the cage 7 has a rotating shaft 92 near the guide rail frame 3 with a second angle sensor 13 connected to the outside of the second angle sensor 13. The lifting frame 5 is equipped with a controller 99, and the cage 7 has an alarm 90 on its top. The controller 99 is electrically connected to the first angle sensor 98, the second angle sensor 13, the alarm 90, and the deceleration lifting device 6.When the flat contact plate 93 comes into contact with an obstacle, the rotating shaft 92 rotates. The angle sensor detects the angle change and transmits a signal to the controller 99. Upon determining the presence of an obstacle, the controller 99 triggers the alarm 90 to sound an alarm and controls the deceleration lift 6 to stop operating, thereby preventing a collision.

[0034] This invention provides a construction hoist with obstacle detection and protection function. During operation, the obstacle detection mechanism 9 installed on the upper and lower sides of the cage 7 enables real-time monitoring of obstacles in the surrounding environment. When the hoist rises or falls along the guide rail 3, if there are obstacles around the cage 7, the obstacles will first come into contact with the flat contact plates 93 installed around the top of the guardrail 8, the top of the lifting frame 5, or the bottom of the cage 7. When the cage 7 rises and any one of the flat contact plates 93 on the top of the guardrail 8 or the top of the lifting frame 5 touches the obstacle, the flat contact plate 93 is subjected to force and rotates around the rotating shaft 92, compressing the torsion spring 94 to generate a restoring force. Adjacent rotating shafts 92 are linked by the bevel gear set 95, so that angle changes in all directions are uniformly fed back to the first angle sensor 98. The controller 99 determines whether there is an obstacle based on the angle change signal collected by the first angle sensor 98, triggers the alarm 90 to issue an alarm, and simultaneously controls the deceleration hoist 6 to stop operating to prevent collision accidents. When the hoist cage 7 descends and any one of the flat contact plates 93 at the bottom of the hoist cage 7 touches an obstacle, the flat contact plate 93 is subjected to force and rotates around the rotating shaft 92, compressing the torsion spring 94 to generate a restoring force. Adjacent rotating shafts 92 are linked by the bevel gear set 95, ensuring that angle changes in all directions are uniformly fed back to the second angle sensor 13. When the hoist cage 7 reaches the designated floor and stops, the driver 72 is activated to open the sliding door 71. When the sliding door 71 opens, it pushes the flat contact plate 93 above it upwards, causing it to flip. The controller 99 detects angle changes through the first angle sensor 98, determines that the sliding door 71 is open, and accordingly controls the disconnection of the power supply to the deceleration lift 6 to prevent accidental activation, thereby improving safety. After the sliding door 71 is open, it facilitates the entry and exit of goods or personnel. After entry and exit are completed, the driver 72 is activated again to close the sliding door 71, the flat contact plate 93 resets under the action of the torsion spring 94, and the power supply to the deceleration lift 6 is then turned on.

[0035] Furthermore, the obstacle detection mechanism 9 also includes an inclined contact plate 10. The inclined contact plate 10 is provided on the top of the flat contact plate 93. The inclined contact plate 10 is inclined upward from the flat contact plate 93 and inclined towards the inside of the cage 7. When the obstacle extends a short length, it only contacts the flat contact plate 93, causing the rotating shaft 92 to rotate to one side. When the obstacle extends a long length and is high, it contacts the inclined contact plate 10, causing the rotating shaft 92 to rotate in the opposite direction.

[0036] To improve the accuracy and responsiveness of obstacle recognition, this invention further provides an inclined contact plate 10, which is tilted inward toward the cage 7, on top of the flat contact plate 93. For obstacles with shorter extensions, they can only contact the flat contact plate 93, causing the rotating shaft 92 to rotate in one direction; while for obstacles with longer extensions, they will first contact the inclined contact plate 10, causing the rotating shaft 92 to rotate in the opposite direction. The controller 99 can accurately determine the type of obstacle by recognizing the direction of the angle change, thus achieving a graded response.

[0037] Furthermore, it also includes an ejection mechanism 11, which includes a telescopic rod 111, a propulsion motor 112, a connecting plate 113, a push rod 114, and a slide rail 115. The telescopic rod 111 is connected to both ends of the top of the flat contact plate 93. The free end of the telescopic rod 111 is connected to the bottom of the inclined contact plate 10. The propulsion motor 112 is installed in the middle of the flat contact plate 93. The connecting plate 113 is connected to the output shaft of the propulsion motor 112. The push rod 114 is connected to the top of the end of the connecting plate 113 away from the output shaft of the propulsion motor 112. The slide rail 115 is connected to the bottom of the inclined contact plate 10. The slide rail 115 has a groove in the middle. The push rod 114 is located in the groove. The propulsion motor 112 is electrically connected to the controller 99.

[0038] The ejection mechanism 11 of this invention is used to automatically remove short obstacles when they are detected. When the controller 99 determines that the obstacle is short, it starts the propulsion motor 112, which drives the connecting plate 113 to rotate 360 ​​degrees. This, in turn, pushes the slide rail 115 to move via the push rod 114, thereby driving the inclined contact plate 10 to move outward and push away the obstacle. After the obstacle is pushed out, the torsion spring 94 drives the rotating shaft 92 and the flat contact plate 93 to automatically reset to their initial state, ensuring that the elevator can continue to operate safely.

[0039] Furthermore, it also includes a clamping mechanism 12, which includes a U-shaped block 121, a clamping plate 122, a rubber plate 123, a servo motor 124, a screw 125, and a guide rod 126. The U-shaped block 121 is mounted on the lifting frame 5, and the guide rod 126 is connected to the inner side of the U-shaped block 121. The clamping plate 122 is slidably connected to the guide rod 126, and the rubber plate 123 is connected to the clamping plate 122. The connecting rod 97 is located at the U-shaped block 121. Inside the U-shaped block 121, the servo motor 124 is mounted on the U-shaped block 121. The output shaft of the servo motor 124 is connected to the screw 125. The end of the screw 125 away from the servo motor 124 is rotatably connected to the U-shaped block 121 through a bearing. The screw 125 passes through the clamping plate 122 and the rubber plate 123. The screw 125 is threadedly connected to the clamping plate 122. The servo motor 124 is electrically connected to the controller 99.

[0040] During the ascent of the elevator, when the controller 99 determines that the obstacle is short based on feedback from the first angle sensor 98, before the propulsion motor 112 starts, it first controls the servo motor 124. The servo motor 124 drives the screw 125 to rotate, causing the clamping plate 122 to move and cooperate with the U-shaped block 121 to clamp the connecting rod 97, thereby fixing the rotating shaft 92 and the flat contact plate 93 above the cage 7 and preventing them from rotating. The clamping part is provided with a rubber plate 123 to increase friction, improve clamping stability, and ensure reliable locking. After the propulsion motor 112 is started to push the obstacle out, the servo motor 124 is controlled to reverse, causing the clamping plate 122 to release its grip on the connecting rod 97.

[0041] Furthermore, it also includes a geared motor 141, a limiting rod 142, and a limiting grooved wheel 143. The limiting grooved wheel 143 is connected to the rotating shaft 92 on the side of the bottom of the cage 7 near the guide rail frame 3. The geared motor 141 is installed at the bottom of the cage 7. The limiting rod 142 is connected to the output shaft of the geared motor 141. The limiting rod 142 cooperates with the limiting grooved wheel 143. The geared motor 141 is electrically connected to the controller 99.

[0042] During the descent of the elevator, when the controller 99 determines, based on feedback from the second angle sensor 13, that the obstacle is still short, before the propulsion motor 112 starts, it first controls the reduction motor 141. The reduction motor 141 drives the limiting rod 142 to rotate, causing it to engage in the groove of the limiting wheel 143, thereby restricting the rotation of the shaft 92 below the cage 7 and preventing the flat contact plate 93 from deflecting due to external force, thus effectively locking the obstacle triggering area. After the propulsion motor 112 is started to push the obstacle out, the reduction motor 141 is controlled to drive the limiting rod 142 out of the groove of the limiting wheel 143.

[0043] Furthermore, it also includes a protective mechanism 15, which includes a limiting rod 151, a bracket 152, a rotating rod 153, a U-shaped clamp 154, and a trigger assembly 155. The limiting rod 151 is connected to both the front and rear sides of the bottom of the sliding door 71, and the bracket 152 is connected to both the front and rear ends of the bottom left side of the cage 7. The rotating rod 153 is rotatably connected to each bracket 152, and the U-shaped clamp 154 ​​for locking the limiting rod 151 is connected to the rotating rod 153. The trigger assembly 155 is installed between the bracket 152, the rotating rod 153, and the base 2. The trigger assembly 155 includes teeth. The rack 1551, trigger rod 1552, cylindrical gear 1553, slide rod 1554, spring 1555, guide sleeve 1556, and blocking plate 1557 are connected to the bracket 152. The rack 1551 and the slide rod 1554 are slidably connected to the guide sleeve 1556. The spring 1555 is connected between the guide sleeve 1556 and the slide rod 1554 and is sleeved on the slide rod 1554. The cylindrical gear 1553 is connected to the rotating rod 153 and meshes with the rack 1551. The blocking plate 1557 is connected to the base 2.

[0044] When the cage 7 descends to the inside of the fence 1, the trigger rod 1552 on it first contacts the blocking plate 1557. As the cage 7 continues to descend, the trigger rod 1552 and the rack 1551 connected to it are blocked and cannot move further down. At this time, the cage 7 drives the bracket 152 and the cylindrical gear 1553 to move downward together, causing the spring 1555 to be stretched. Since the cylindrical gear 1553 and the rack 1551 remain engaged, the cylindrical gear 1553 rotates under the action of the rack 1551, and drives the U-shaped sleeve 154 to rotate synchronously through the rotating rod 153, disengaging from the limiting rod 151. At this time, the sliding door 71 unlocks, and the drive 72 can be activated to open the sliding door 71, allowing personnel or goods to enter or exit. When the cage 7 begins to rise, the trigger rod 1552 moves upward with the cage 7 and gradually disengages from the restriction of the blocking plate 1557. Under the restoring force of the spring 1555, the trigger rod 1552 drives the rack 1551 to reset, thereby driving the cylindrical gear 1553 to rotate in the opposite direction. This, in turn, drives the U-shaped sleeve 154 to rotate in the opposite direction via the rotating rod 153, re-engaging it on the outside of the limiting rod 151 to form an effective limit. This ensures that the sliding door 71 on the side facing away from the building remains locked during the hoisting cage 7's operation in the air, preventing accidental opening and thus avoiding falls of personnel or goods from the sliding door 71, effectively improving the safety of the elevator operation.

[0045] Furthermore, the obstacle detection mechanism 9 also includes a first light curtain 16 and a second light curtain 17. The first light curtain 16 is provided on both the front and rear sides of the upper part of the fence 1 to detect whether there is an obstacle approaching the top area of ​​the cage 7. The second light curtain 17 is provided around the cage 7 to detect whether there is an obstacle approaching the cage 7 from the side. The first light curtain 16 and the second light curtain 17 are both electrically connected to the controller 99.

[0046] When an obstacle approaches the top of the hoist cage 7, the infrared beams in the two first light curtains 16 are blocked. The first light curtains 16 transmit signals to the controller 99. Upon receiving the signal, the controller 99 immediately stops the deceleration lift 6 and activates the alarm 90 to sound an alarm, preventing the hoist cage 7 from continuing to rise and colliding with the obstacle. Similarly, when an obstacle approaches the hoist cage 7 from the side, the beam of the second light curtain 17 in the corresponding direction is blocked. The second light curtain 17 transmits signals to the controller 99. After determining that there is a danger, the controller 99 also stops the deceleration lift 6 and triggers the alarm 90 to sound an alarm, thereby effectively avoiding safety accidents caused by lateral obstacles.

Claims

1. A construction hoist based on obstacle detection and protection function, comprising a fence (1), a base (2), a guide rail frame (3), a lifting frame (5), a speed reducer (6), a cage (7), a sliding door (71), a driver (72), and a guardrail (8), wherein the fence (1) is provided on the outside of the base (2), the guide rail frame (3) is provided on the base (2), the lifting frame (5) is installed on the guide rail frame (3), the speed reducer (6) is provided on the lifting frame (5), the cage (7) is connected to the bottom of the lifting frame (5), the sliding door (71) and the driver (72) for controlling its opening and closing are provided on both sides of the cage (7), and the guardrail (8) is installed on the top of the cage (7), characterized in that, It also includes an obstacle detection mechanism (9), which includes a flat contact plate (93), a first angle sensor (98), a second angle sensor (13) and a controller (99). Flat contact plates (93) are movably installed on the top of the guardrail (8), the top of the lifting frame (5) and the bottom of the cage (7). The first angle sensor (98) is installed on the flat contact plate (93) above the cage (7), and the second angle sensor (13) is installed on the flat contact plate (93) below the cage (7). The controller (99) is installed on the lifting frame (5) and is electrically connected to the first angle sensor (98), the second angle sensor (13) and the deceleration lift (6) respectively. When the flat contact plate (93) contacts an obstacle, the angle sensor detects the angle change and transmits a signal to the controller (99). After the controller (99) determines that there is an obstacle, it controls the deceleration lift (6) to stop running. The obstacle detection mechanism (9) also includes a bushing (91), a rotating shaft (92), a torsion spring (94), a bevel gear set (95), a disc (96), and a connecting rod (97). Bushings (91) are installed around the top of the guardrail (8), the top of the lifting frame (5), and the bottom of the cage (7). A rotating shaft (92) is rotatably connected inside the bushing (91). A flat contact plate (93) is connected to the rotating shaft (92). A torsion spring (94) is connected between the flat contact plate (93) and the bushing (91). The two adjacent rotating shafts (92) are synchronously driven through the bevel gear set (95). The rotating shaft (92) on the guardrail (8) and the rotating shaft (92) on the lifting frame (5) are synchronously driven through the disc (96) and the connecting rod (97). The rotating shaft (92) on the lifting frame (5) is connected to the first angle sensor (98). The rotating shaft (92) at the bottom of the cage (7) is connected to the second angle sensor (13).

2. A construction hoist based on obstacle detection and protection function according to claim 1, characterized in that the obstacle... The testing unit (9) also includes an alarm (90). An alarm (90) is installed on the top of the cage (7). The alarm (90) is electrically connected to the controller (99). After the controller (99) determines that there is an obstacle, it simultaneously activates the alarm (90) to issue an alarm.

3. A construction hoist based on obstacle detection and protection function according to claim 1, characterized in that the obstacle... The testing mechanism (9) also includes an inclined contact plate (10), which is provided on the top of the flat contact plate (93). The inclined contact plate (10) is inclined upward from the flat contact plate (93) and inclined towards the inside of the cage (7).

4. A construction hoist based on obstacle detection and protection function according to claim 3, characterized in that, It also includes a launching mechanism (11), which includes a telescopic rod (111), a propulsion motor (112), a connecting plate (113), a push rod (114), and a slide rail (115). The top of the flat contact plate (93) is connected to the telescopic rod (111), and the free end of the telescopic rod (111) is connected to the inclined contact plate (10). The propulsion motor (112) is installed on the flat contact plate (93), and the output shaft of the propulsion motor (112) is connected to the connecting plate (113). The push rod (114) is connected to the connecting plate (113), and the bottom of the inclined contact plate (10) is connected to the slide rail (115). The push rod (114) and the slide rail (115) slide together. The propulsion motor (112) is electrically connected to the controller (99).

5. A construction hoist based on obstacle detection and protection function according to claim 4, characterized in that, It also includes a clamping mechanism (12), which includes a U-shaped block (121), a clamping plate (122), a servo motor (124) and a screw (125). The U-shaped block (121) is installed on the lifting frame (5), and the clamping plate (122) is provided inside the U-shaped block (121). The connecting rod (97) is located between the U-shaped block (121) and the clamping plate (122). The servo motor (124) is installed on the U-shaped block (121), and the screw (125) is connected to the output shaft of the servo motor (124). The screw (125) is threadedly connected to the clamping plate (122), and the servo motor (124) is electrically connected to the controller (99).

6. A construction hoist based on obstacle detection and protection function according to claim 4, characterized in that, It also includes a geared motor (141), a limit lever (142) and a limit groove wheel (143). The limit groove wheel (143) is connected to the rotating shaft (92) at the bottom of the cage (7). The geared motor (141) is installed at the bottom of the cage (7). The limit lever (142) is connected to the output shaft of the geared motor (141). The limit lever (142) cooperates with the limit groove wheel (143). The geared motor (141) is electrically connected to the controller (99).

7. A construction hoist based on obstacle detection and protection function according to claim 1, characterized in that, It also includes a protective mechanism (15), which includes a limit rod (151), a bracket (152), a rotating rod (153), a U-shaped sleeve (154), and a trigger assembly (155). The lower part of the sliding door (71) is connected to the limit rod (151), and the bottom of the cage (7) is connected to the bracket (152). Each bracket (152) is rotatably connected to a rotating rod (153), and a U-shaped sleeve (154) for locking the limit rod (151) is connected to the rotating rod (153). A trigger assembly (155) is installed between the bracket (152), the rotating rod (153), and the base (2).

8. A construction hoist based on obstacle detection and protection function according to claim 7, characterized in that, The trigger assembly (155) includes a rack (1551), a trigger rod (1552), a cylindrical gear (1553), a slide rod (1554), a spring (1555), a guide sleeve (1556), and a stop plate (1557). The guide sleeve (1556) is connected to the bracket (152). The rack (1551) and the slide rod (1554) are slidably connected to the guide sleeve (1556). A spring (1555) is connected between the guide sleeve (1556) and the slide rod (1554). The spring (1555) is sleeved on the slide rod (1554). A cylindrical gear (1553) is connected to the rotating rod (153). The cylindrical gear (1553) meshes with the rack (1551). A stop plate (1557) is connected to the base (2).

9. A construction hoist based on obstacle detection and protection function according to claim 1, characterized in that the obstacle... The testing agency (9) also includes a first light curtain (16) and a second light curtain (17). The first light curtain (16) is provided on the upper part of the fence (1), and the second light curtain (17) is provided around the cage (7). The first light curtain (16) and the second light curtain (17) are both electrically connected to the controller (99).

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