Strength detection device for elevator production and processing

Abstract

This invention discloses a strength testing device for elevator manufacturing, relating to the field of elevator testing technology. It includes a base with a protective shell fixedly mounted on its top. A counterweight is mounted on the top front side of the base. A guide wheel is fixedly connected to the middle of a drive rod, and a friction expansion mechanism is installed inside the guide wheel. A drive assembly is rotatably connected to the inner wall of the rear end of the protective shell. The friction expansion mechanism includes a push rod that slides laterally on the inner wall of the drive rod, and an abutment plate is rotatably connected to the outer surface of the push rod. An expansion plate is disposed in the groove of the guide wheel, and an abutment rod is fixedly connected to the inner surface of the expansion plate. An adjustment assembly is installed inside the push rod. This invention solves the problem of traditional fixed wheel diameter testing equipment having a single working condition simulation and being inconvenient to reproduce the alternating tension during elevator start-stop, significantly improving the authenticity and accuracy of wire rope fatigue strength testing.

Description

Technical Field

[0001] This invention relates to the field of elevator testing technology, specifically a strength testing device for elevator production and processing. Background Technology

[0002] In elevator wire rope fatigue strength testing, photoelectric sensor counting technology is the core technology for achieving automated and high-precision test data acquisition. By capturing the rotation pulse signal of the detection turntable through photoelectric sensors and extracting real-time equipment operating condition data, the number of reciprocating bending cycles of the wire rope can be accurately counted. This is a key component ensuring the accuracy of elevator cable fatigue test data and the traceability of the test process. As an essential vertical transportation device in high-rise buildings, the operational safety and stability of elevators are directly related to public safety and the reliability of special equipment operation. Elevator wire ropes are the core load-bearing components of the elevator traction suspension system.

[0003] Existing elevator wire rope strength testing devices mostly adopt a sheave-wound structure, repeatedly bending the elevator wire rope for testing. Conventional testing equipment has a fixed sheave diameter, and the contact state between the wire rope and the sheave remains unchanged during the testing process. It can only simulate a single working condition of the elevator running at a constant speed and smoothly. However, in the actual working scenario of an elevator, the impact tension and friction on the wire rope increase sharply at the moment of start-up. Existing testing devices are not suitable for replicating the changes caused by the frequent start-stop of elevators in actual operation, and cannot meet the high-precision and high-simulation fatigue strength testing requirements in elevator production and processing, resulting in technical drawbacks such as poor reliability of test data.

[0004] To address the aforementioned issues, innovative designs are urgently needed based on existing approaches. Summary of the Invention

[0005] The purpose of this invention is to provide a strength testing device for elevator manufacturing and processing to solve the problems mentioned in the background. The technical solution of this invention addresses the problem that the existing technical solutions are too simplistic and provides a solution that is significantly different from the existing technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a strength testing device for elevator production and processing, comprising a device base, a protective shell fixedly installed on the top of the device base, a counterweight block installed on the top front side of the device base, a drive rod rotatably connected to the inner wall of the protective shell, a guide wheel fixedly connected to the middle of the drive rod, a friction expansion mechanism installed inside the guide wheel, and a drive assembly rotatably connected to the inner wall of the rear end of the protective shell; The friction expansion mechanism includes a push rod that slides laterally on the inner wall of the drive rod, an abutment plate that is rotatably connected to the outer surface of the push rod, an expansion plate that is provided in the groove of the guide wheel, an abutment rod that is fixedly connected to the inner surface of the expansion plate and extends into the drive rod, a clamping plate that is limited and slides at both ends of the expansion plate away from the abutment rod, an abutment block that is fixedly connected to the inner wall of the groove of the guide wheel, a squeezing rod that is fixedly connected to the side of the clamping plate away from the guide wheel, and an adjustment component installed inside the push rod.

[0007] Preferably, the adjusting assembly includes an adjusting rod rotatably connected to the inner wall of the push rod, a sleeve fitted on the outer surface of the adjusting rod, a deflecting rod rotatably connected to the outer surface of the adjusting rod, a limiting groove corresponding to the deflecting rod on the surface of the push rod, a limiting groove extending from the end of the push rod away from the sleeve and rotatably connected to the back end of the contact plate, a micro motor mounted on the inner wall of one end of the drive rod, a drive shaft mounted on the output end of the micro motor, and the adjusting rod extending from the push rod and sliding within the drive shaft in a limited position.

[0008] Preferably, the drive assembly includes a pull rod rotatably connected to the inner wall of the rear end of the protective shell, a rotating disk rotatably connected below the pull rod on the inner wall of the protective shell, a traction rod rotatably connected to the surface of the rotating disk away from the center, an end of the traction rod away from the rotating disk being rotatably connected to the bottom of the pull rod away from the rotation point, a first oil tank fixedly connected to the top of the inner part of the protective shell, a first piston rod slidingly limited within the first oil tank, a moving block slidingly limited laterally at the top of the pull rod, the output end of the first piston rod slidingly limited within a groove opened on the surface of the moving block, and a second oil tank fixedly connected to the inner wall of the end of the push rod away from the micro motor, a second piston rod slidingly limited within the second oil tank.

[0009] Preferably, the drive rod is provided in three sets, which are arranged in a triangle on the inner wall of the protective shell. A steel wire cable is installed on the top of the counterweight, and the steel wire cable passes through the guide wheel in the middle of the drive rod in an alternating manner. The other end of the steel wire cable is connected to the end of the pulling rod.

[0010] Preferably, the expansion plate is provided with six sets of evenly arranged circumferentially within the guide wheel groove, and the surface of the abutment rod is fitted with a first spring. One end of the first spring is fixedly connected to the inner wall of the drive rod, and the other end is fixedly connected to a protrusion provided on the surface of the abutment rod. The end of the abutment rod abuts against the surface of the abutment plate.

[0011] Preferably, a friction plate is slidably limited within a groove on the opposite side of the pressing plate. A second spring is fixedly connected to the back end of the friction plate, and the other end of the second spring is fixed to the inner wall of the groove on the surface of the pressing plate. The outer end of the friction plate is configured as an inclined structure, and the contact surface of the abutment block is configured as an inclined structure. The pressing rod abuts against the contact surface of the abutment block.

[0012] Preferably, the surface of the adjusting rod is provided with a guide groove, and a guide rod is fixedly connected to the inner wall of the sleeve corresponding to the guide groove. The guide groove is provided with a spiral structure along the surface of the adjusting rod, and the guide rod is limited to slide within the guide groove.

[0013] Preferably, the lower oil chamber of the first oil tank is connected to the second oil tank in each of the three sets of drive rods via oil delivery hoses, the output end of the second piston rod is fixedly connected to the end of the push rod, and a third spring is sleeved on the surface of the second piston rod.

[0014] Preferably, a photoelectric sensor is installed on the top of the device base below the rotating disk, and a light-shielding block is installed on the outer surface of the rotating disk corresponding to the photoelectric sensor.

[0015] Preferably, the method includes the following steps: S1: Based on the specifications of the steel wire rope, the micro motor drives the adjusting rod to rotate. Relying on the guide groove and the guide rod, the sleeve and deflection rod are driven to finely adjust the displacement of the contact plate, adjust the guide wheel diameter expansion limit, adapt to different ropes, and after the rope is wound, the basic tension is completed by the counterweight block, and the test is started. S2: The rotating disk rotates at a constant speed, which drives the pulling rod to swing back and forth through the traction rod, providing alternating traction force for the cable. The first oil tank synchronously supplies oil to the three sets of second oil tanks, driving the second piston rods of each set to extend and retract synchronously. S3: During tensioning, the second piston rod pushes the push rod, the contact plate presses against the contact rod, the expansion plate expands the guide wheel diameter, and the clamping plate cooperates with the friction plate to increase friction tension, simulating elevator starting loading; S4: When the equipment is running, the rotating disk drives the light-blocking block to rotate continuously, periodically triggering the photoelectric sensor on the device base to capture and extract pulse signals in real time, automatically counting the number of cable bending cycles, realizing automated detection and accurate and traceable data.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention comprises a push rod, a contact plate, an expansion plate, a contact rod, a pressing plate, a contact block, and a squeezing rod. When the device is started, the push rod moves under the action of the drive assembly, pressing the contact rod and causing the expansion plate to expand outward of the guide wheel, increasing the effective wheel diameter of the guide wheel. At the same time, the pressing plates at both ends of the expansion plate move with the expansion plate, causing the squeezing rod to contact the contact block of the inclined structure, pushing the pressing plate to adhere to the steel wire rope. The friction plate, tightened by the spring, increases the contact friction and clamping force with the steel wire rope, enabling the guide wheel to tighten its wheel diameter and grip the rope body during the tensioning phase according to the detection process, instantly establishing tension force. This replicates the impact of a sudden increase in car starting load and sudden force on the steel wire rope. During the relaxation and return phase, the wheel diameter and friction resistance are reduced, accurately simulating the dynamic changes in actual elevator operation. This solves the problem of traditional fixed wheel diameter detection equipment having a single working condition simulation and being inconvenient to reproduce the alternating tension of elevator start-stop, significantly improving the authenticity and accuracy of steel wire rope fatigue strength detection.

[0017] 2. This invention includes an adjusting rod, a sleeve, a deflecting rod, a drive shaft, a guide groove, and a guide rod. Before testing, the micro motor inside the drive rod can be controlled according to the thickness of the steel wire rope to drive the drive shaft to rotate, which in turn drives the adjusting rod to rotate. The spiral guide groove and the guide rod limit each other, causing the sleeve to move axially along the adjusting rod. This, in conjunction with the deflecting rod, pushes the contact plate to expand outwards. This allows the guide wheel diameter to be adjusted according to the thickness of the steel wire rope, enabling adaptive adjustment for steel wire ropes of different sizes and improving the practicality of the device.

[0018] 3. This invention includes a pull rod, a rotating disk, a traction rod, a first oil tank, a first piston rod, a second oil tank, and a second piston rod. As the rotating disk rotates, the traction rod drives the pull rod to reciprocate, providing reciprocating traction force to the steel wire rope. This simulates the alternating tensile and relaxation loads during elevator operation, enabling fatigue reciprocating testing of the steel wire rope. Simultaneously, the hydraulic linkage structure enables the synchronous operation of the internal structures of the three sets of guide wheels. Furthermore, a photoelectric sensor is added, which is periodically triggered by the rotating disk driving the light-blocking block to automatically collect and detect cyclic pulse signals and count the number of bending fatigue cycles of the steel wire rope. This effectively reduces counting errors, automates the testing process, and is compatible with the high-precision testing standards for large-scale elevator production. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the internal structure of the present invention; Figure 3 This is a schematic cross-sectional view of the internal structure of the guide wheel of the present invention; Figure 4 This is a side view of the internal structure of the drive rod of the present invention; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A in the middle; Figure 6 This is a schematic cross-sectional view of the internal structure of the push rod of the present invention; Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point B; Figure 8 This is a schematic diagram of the transmission shaft and adjusting rod structure of the present invention.

[0020] In the diagram: 1. Device base; 2. Protective shell; 3. Counterweight; 4. Drive rod; 5. Guide wheel; 61. Push rod; 62. Contact plate; 63. Expansion plate; 64. Contact rod; 65. Pressing plate; 66. Contact block; 67. Extrusion rod; 681. Adjusting rod; 682. Sleeve; 683. Deflection rod; 684. Drive shaft; 71. Pulling rod; 72. Rotating disk; 73. Traction rod; 74. First oil tank; 75. First piston rod; 76. Second oil tank; 77. Second piston rod; 8. Steel wire rope; 9. Friction plate; 10. Guide groove; 11. Guide rod; 12. Photoelectric sensor; 13. Light-shielding block. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-8 The present invention provides a technical solution: a strength testing device for elevator production and processing, comprising a device base 1, a protective shell 2 fixedly installed on the top of the device base 1, a counterweight 3 installed on the top front side of the device base 1, a drive rod 4 rotatably connected to the inner wall of the protective shell 2, a guide wheel 5 fixedly connected to the middle of the drive rod 4, three sets of drive rods 4 arranged in a triangular configuration on the inner wall of the protective shell 2, a steel wire cable 8 installed on the top of the counterweight 3, the steel wire cable 8 passing through the guide wheel 5 in the middle of the drive rod 4, the other end of the steel wire cable 8 being connected to the end of the pull rod 71, a friction expansion mechanism installed inside the guide wheel 5, and a drive assembly rotatably connected to the inner wall of the rear end of the protective shell 2; The friction expansion mechanism includes a push rod 61 that slides laterally on the inner wall of the drive rod 4. An abutment plate 62 is rotatably connected to the outer surface of the push rod 61. An expansion plate 63 is disposed within the groove of the guide wheel 5. An abutment rod 64 is fixedly connected to the inner surface of the expansion plate 63 and extends into the drive rod 4. Pressure plates 65 are slidably limited at both ends of the expansion plate 63 away from the abutment rod 64. An abutment block 66 is fixedly connected to the inner wall of the groove of the guide wheel 5. A pressing rod 67 is fixedly connected to the side of the pressure plate 65 away from it. Six sets of expansion plates 63 are evenly arranged circumferentially within the groove of the guide wheel 5. Abutment rod 64 is sleeved on the surface of the abutment rod 64. There is a first spring, one end of which is fixedly connected to the inner wall of the drive rod 4, and the other end is fixedly connected to the protrusion on the surface of the abutment rod 64. The end of the abutment rod 64 abuts against the surface of the abutment plate 62. A friction plate 9 is slidably limited in a groove opened on the opposite side of the pressing plate 65. A second spring is fixedly connected to the back end of the friction plate 9. The other end of the second spring is fixed to the inner wall of the groove on the surface of the pressing plate 65. The outer end of the friction plate 9 is set with an inclined structure. The abutment surface of the abutment block 66 is set with an inclined structure. The squeezing rod 67 abuts against the abutment surface of the abutment block 66. An adjustment component is installed inside the push rod 61. Driven by the second piston rod 77, the push rod 61 moves laterally, causing the abutment plate 62 to move synchronously, which in turn presses against the abutment rod 64, causing multiple sets of expansion plates 63 to expand synchronously to the outside of the guide wheel 5, increasing the overall diameter of the guide wheel 5. During the displacement of the expansion plate 63, the pressing plates 65 at both ends move synchronously with the position, causing the pressing rod 67 to press against the abutment block 66 of the inclined structure, pushing the pressing plate 65 to fit tightly against the steel wire rope 8. At the same time, in conjunction with the friction plate 9 pressed by the second spring, the contact friction and clamping force between the friction plate 9 and the steel wire rope 8 are increased. At this time, the diameter of the guide wheel 5 is tightened and the frictional resistance of the rope increases, which can instantly establish a stable axial tension force.

[0023] In one embodiment of the present invention, the adjustment assembly includes an adjustment rod 681 rotatably connected to the inner wall of the push rod 61, a sleeve 682 sleeved on the outer surface of the adjustment rod 681, a deflection rod 683 rotatably connected to the outer surface of the adjustment rod 681, a limiting groove corresponding to the deflection rod 683 on the surface of the push rod 61, a limiting groove extending from the end of the push rod 61 away from the sleeve 682 and rotatably connected to the back end of the contact plate 62, a micro motor mounted on the inner wall of one end of the drive rod 4, a transmission shaft 684 mounted on the output end of the micro motor, the adjustment rod 681 extending from the push rod 61 and sliding within the transmission shaft 684, a guide groove 10 on the surface of the adjustment rod 681, a guide rod 11 fixedly connected to the inner wall of the sleeve 682 corresponding to the guide groove 10, the guide groove 10 being spirally shaped along the surface of the adjustment rod 681, and the guide rod 11 sliding within the guide groove 10. The drive shaft 684 is driven to rotate by the micro motor inside the drive rod 4, which in turn drives the adjusting rod 681 to rotate synchronously. The spiral guide groove 10 on the surface of the adjusting rod 681 and the guide rod 11 inside the sleeve 682 are in a limiting sliding fit, so that the sleeve 682 is precisely displaced along the axial direction of the adjusting rod 681. In addition, the transmission pushing action of the deflection rod 683 drives the contact plate 62 to finely adjust the expansion displacement. The wheel diameter expansion limit of the guide wheel 5 can be flexibly adjusted according to the thickness of the steel wire rope 8, so as to realize the adaptation and adjustment of steel wire rope 8 of different specifications.

[0024] In one embodiment of the present invention, the driving assembly includes a pull rod 71 rotatably connected to the inner wall of the rear end of the protective shell 2. A rotating disk 72 is rotatably connected below the pull rod 71 and located on the inner wall of the protective shell 2. A traction rod 73 is rotatably connected to the surface of the rotating disk 72 away from its center. One end of the traction rod 73 away from the rotating disk 72 is rotatably connected to the bottom of the pull rod 71 away from its rotation point. A first oil tank 74 is fixedly connected to the top of the inner part of the protective shell 2. A first piston rod 75 is slidably limited within the first oil tank 74. A moving block is slidably limited laterally at the top of the pull rod 71. The output end of the first piston rod 75 is located on the surface of the moving block. The sliding groove is limited within the surface. The inner wall of the push rod 61 away from the micro motor is fixedly connected to the second oil tank 76. The second oil tank 76 is limited within the second piston rod 77. The top of the device base 1 is installed below the rotating disk 72. The outer surface of the rotating disk 72 is equipped with a light shielding block 13 corresponding to the photoelectric sensor 12. The lower oil chamber of the first oil tank 74 is connected to the second oil tank 76 in the three sets of drive rods 4 through oil delivery hoses. The output end of the second piston rod 77 is fixedly connected to the end of the push rod 61. A third spring is sleeved on the surface of the second piston rod 77. The rotating disk 72 rotates at a constant speed, and its position away from the center is rotatably connected to the end of the traction rod 73. As the rotating disk 72 continues to rotate in a circle, the traction rod 73 can continuously drive the pulling rod 71 to make regular reciprocating swings, providing stable and periodic reciprocating traction power for the steel wire cable 8. At the same time, during the reciprocating swing of the pulling rod 71, the moving block at the top of the pulling rod 71 can achieve lateral limiting sliding. The output end of the first piston rod 75 is adapted to the sliding groove of the moving block, and real-time compensation is made for the stroke deviation and angle deviation during the swing of the pulling rod 71, squeezing the oil in the first oil tank 74. The first oil tank 74 is connected to the second oil tank 76 inside the three sets of drive rods 4 through multiple sets of independent oil supply hoses, which can simultaneously supply oil to the three sets of second oil tanks 76, driving each set of second piston rods 77 to extend and retract synchronously.

[0025] Based on the above embodiments, please refer to Figures 1-8 The method includes the following steps: S1: Based on the specifications of the steel wire rope 8, the micro motor drives the adjusting rod 681 to rotate. Relying on the guide groove 10 and the guide rod 11, the sleeve 682 and the deflection rod 683 are driven to finely adjust the displacement of the contact plate 62, adjust the wheel diameter expansion limit of the guide wheel 5, adapt to different ropes, and after the rope is wound, the basic tension is completed by the counterweight 3, and the test is started. S2: The rotating disk 72 rotates at a constant speed, and the traction rod 73 drives the pulling rod 71 to swing back and forth, providing alternating traction force for the cable. The first oil tank 74 synchronously supplies oil to the three sets of second oil tanks 76, driving the second piston rods 77 of each set to extend and retract synchronously. S3: During tensioning, the second piston rod 77 pushes the push rod 61 and the contact plate 62 presses against the contact rod 64. The expansion plate 63 expands the diameter of the guide wheel 5. The clamping plate 65 cooperates with the friction plate 9 to increase friction and tension, simulating the elevator starting loading. S4: When the equipment is running, the rotating disk 72 drives the light-blocking block 13 to rotate continuously, periodically triggering the photoelectric sensor 12 on the device seat 1 to capture and extract pulse signals in real time, automatically counting the number of cable bending cycles, realizing automated detection and accurate and traceable data.

[0026] Working principle: First, based on the actual specifications of the steel wire rope 8 to be tested, the guide wheel 5 is adjusted to accommodate the expansion range of its diameter. The drive shaft 684 is rotated by a micro-motor inside the drive rod 4, causing the adjusting rod 681 to rotate synchronously. The spiral guide groove 10 on the surface of the adjusting rod 681 and the guide rod 11 inside the sleeve 682 provide a limiting sliding fit, allowing the sleeve 682 to precisely shift axially along the adjusting rod 681. Then, the deflection rod 683 pushes the contact plate 62 to finely adjust its expansion displacement. The diameter expansion limit of the guide wheel 5 can be flexibly adjusted according to the thickness of the steel wire rope 8, achieving adaptability for different specifications of steel wire rope 8 and effectively improving the device's versatility. After adjustment, the steel wire rope 8 is wound around the outside of the three sets of triangularly arranged guide wheels 5, with its end connected to the pulling rod 71. The counterweight 3 provides basic tension, allowing the equipment to be started for steel wire rope bending. During fatigue strength testing, in the formal testing process of the equipment, the rotating disk 72 on the inner wall of the rear end of the protective shell 2 rotates at a constant speed. Its position away from the center is rotated and connected to the end of the traction rod 73. As the rotating disk 72 continues to rotate, the traction rod 73 can continuously drive the pulling rod 71 to make regular reciprocating swings, providing stable and periodic reciprocating traction power for the steel wire cable 8. At the same time, during the reciprocating swing of the pulling rod 71, the moving block at the top of the pulling rod 71 can achieve lateral limiting sliding. The output end of the first piston rod 75 is adapted to the sliding groove of the moving block, and real-time compensation for the stroke deviation and angle deviation during the swing of the pulling rod 71, squeezing the oil in the first oil tank 74. The first oil tank 74 is connected to the second oil tank 76 inside the three sets of drive rods 4 through multiple sets of independent oil supply hoses, which can simultaneously supply oil to the three sets of second oil tanks 76, driving each set of second piston rods 77 to extend and retract synchronously. Driven by the second piston rod 77, the push rod 61 moves laterally, causing the abutment plate 62 to move synchronously, thereby pressing against the abutment rod 64. This causes multiple sets of expansion plates 63 to expand synchronously outwards towards the guide wheel 5, increasing the overall diameter of the guide wheel 5. During the displacement of the expansion plate 63, the clamping plates 65 at both ends move synchronously, causing the pressing rod 67 to press against the inclined abutment block 66, pushing the clamping plate 65 to fit tightly against the steel wire cable 8. At the same time, the friction plate 9 is pressed against by the second spring. The contact friction and clamping force between the friction plate 9 and the steel wire rope 8 are increased. At this time, the guide wheel 5 is tightened and the frictional resistance of the rope increases, which can instantly establish a stable axial tension force. This accurately replicates the impact condition of the sudden increase in load and sudden force on the steel wire rope when the elevator car starts, and truly restores the force state during the elevator start-up phase. Under the detection return relaxation condition, the hydraulic system drives the push rod 61 to move in the opposite direction, and the contact plate 62 releases the top pressure limit on the contact rod 64. Under the reset action of the first spring, the contact rod 64... The expansion plate 63 retracts and resets, reducing the effective diameter of the guide wheel 5. Simultaneously, the compression rod 67 disengages from the compression engagement with the contact block 66, and the clamping plate 65 and friction plate 9 relax synchronously. The contact friction between the friction plate 9 and the steel wire rope 8 is significantly reduced, decreasing the drag resistance during the return stroke. This simulates the state of load relaxation and stress unloading during elevator braking and stopping, fully restoring the dynamic changes in steel wire rope tension and friction resistance during elevator start-up and stop. This solves the problem of the single working condition simulation of traditional fixed wheel diameter equipment, greatly improving the realism of fatigue detection. Throughout the continuous operation of the entire testing equipment, the rotating disk 72 rotates continuously, and the light-shielding block 13 mounted on its outer side rotates synchronously with the rotating disk, periodically and intermittently scanning the photoelectric sensor 12 on the top of the device base 1. The photoelectric sensor 12 can capture the on / off pulse signal in real time and output it outward, automatically counting the number of detection cycles, realizing the automation of the detection process and accurate and traceable data, fully adapting to the high-precision and standardized fatigue detection requirements of large-scale elevator production and processing.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A strength detection device for elevator production and processing, comprising a device seat (1), characterized in that: A protective shell (2) is fixedly installed on the top of the device base (1). A counterweight (3) is installed on the top front side of the device base (1). A drive rod (4) is rotatably connected to the inner wall of the protective shell (2). A guide wheel (5) is fixedly connected to the middle of the drive rod (4). A friction expansion mechanism is installed inside the guide wheel (5). A drive assembly is rotatably connected to the inner wall of the rear end of the protective shell (2). The friction expansion mechanism includes a push rod (61) that slides laterally on the inner wall of the drive rod (4). A contact plate (62) is rotatably connected to the outer surface of the push rod (61). An expansion plate (63) is provided in the groove of the guide wheel (5). A contact rod (64) is fixedly connected to the inner surface of the expansion plate (63) and extends into the drive rod (4). A pressing plate (65) is slidably limited at both ends of the expansion plate (63) away from the contact rod (64). A contact block (66) is fixedly connected to the inner wall of the groove of the guide wheel (5). A squeezing rod (67) is fixedly connected to the side of the pressing plate (65) away from it. An adjustment component is installed inside the push rod (61).

2. The strength testing device for elevator manufacturing and processing according to claim 1, characterized in that: The adjustment assembly includes an adjustment rod (681) rotatably connected to the inner wall of the push rod (61). A sleeve (682) is fitted on the outer surface of the adjustment rod (681). A deflection rod (683) is rotatably connected to the outer surface of the adjustment rod (681). A limiting groove is opened on the surface of the push rod (61) corresponding to the deflection rod (683). The end of the push rod (61) away from the sleeve (682) extends out of the limiting groove and is rotatably connected to the back end of the contact plate (62). A micro motor is installed on the inner wall of one end of the drive rod (4). A transmission shaft (684) is installed at the output end of the micro motor. The adjustment rod (681) extends out of the push rod (61) and is limited to sliding within the transmission shaft (684).

3. The strength testing device for elevator manufacturing and processing according to claim 1, characterized in that: The drive assembly includes a pull rod (71) rotatably connected to the inner wall of the rear end of the protective shell (2). A rotating disk (72) is rotatably connected below the pull rod (71) on the inner wall of the protective shell (2). A traction rod (73) is rotatably connected to the surface of the rotating disk (72) away from the center. One end of the traction rod (73) away from the rotating disk (72) is rotatably connected to the bottom of the pull rod (71) away from the rotation point. A first oil tank (74) is fixedly connected to the top of the inner part of the protective shell (2). A first piston rod (75) is slidably limited inside the first oil tank (74). A moving block is slidably limited to the top of the pull rod (71). The output end of the first piston rod (75) is slidably limited to a groove opened on the surface of the moving block. A second oil tank (76) is fixedly connected to the inner wall of the end of the push rod (61) away from the micro motor. A second piston rod (77) is slidably limited inside the second oil tank (76).

4. The strength testing device for elevator manufacturing and processing according to claim 1, characterized in that: The drive rod (4) is provided in three sets. The three sets of drive rods (4) are arranged in a triangular shape on the inner wall of the protective shell (2). A steel wire cable (8) is installed on the top of the counterweight (3). The steel wire cable (8) passes through the guide wheel (5) in the middle of the drive rod (4) in an alternating manner. The other end of the steel wire cable (8) is connected to the end of the pulling rod (71).

5. The strength testing device for elevator manufacturing and processing according to claim 1, characterized in that: The expansion plate (63) is evenly arranged in six groups in the groove of the guide wheel (5). The surface of the abutment rod (64) is fitted with a first spring. One end of the first spring is fixedly connected to the inner wall of the drive rod (4), and the other end is fixedly connected to the protrusion provided on the surface of the abutment rod (64). The end of the abutment rod (64) abuts against the surface of the abutment plate (62).

6. The strength testing device for elevator manufacturing and processing according to claim 1, characterized in that: A friction plate (9) is slidably limited in a groove on the opposite side of the pressing plate (65). A second spring is fixedly connected to the back end of the friction plate (9), and the other end of the second spring is fixed to the inner wall of the groove on the surface of the pressing plate (65). The outer end of the friction plate (9) is set as an inclined structure. The contact surface of the abutment block (66) is set as an inclined structure. The pressing rod (67) abuts against the contact surface of the abutment block (66).

7. The strength testing device for elevator manufacturing and processing according to claim 2, characterized in that: The adjusting rod (681) has a guide groove (10) on its surface. The sleeve (682) has a guide rod (11) fixedly connected to the guide groove (10) on its inner wall. The guide groove (10) is spirally shaped along the surface of the adjusting rod (681). The guide rod (11) is located in the guide groove (10) and slides within it.

8. The strength testing device for elevator manufacturing and processing according to claim 3, characterized in that: The lower oil chamber of the first oil tank (74) is connected to the second oil tank (76) in the three sets of drive rods (4) through oil delivery hoses. The output end of the second piston rod (77) is fixedly connected to the end of the push rod (61). A third spring is sleeved on the surface of the second piston rod (77).

9. A strength testing device for elevator manufacturing and processing according to claim 3, characterized in that: A photoelectric sensor (12) is installed on the top of the device base (1) below the rotating disk (72), and a light-shielding block (13) is installed on the outer surface of the rotating disk (72) corresponding to the photoelectric sensor (12).

10. A strength testing method for elevator manufacturing, applicable to the strength testing device for elevator manufacturing described in claims 1-9, characterized in that: The method includes the following steps: S1: According to the specifications of the steel wire rope (8), the micro motor drives the adjusting rod (681) to rotate. Relying on the guide groove (10) and the guide rod (11) to cooperate, the sleeve (682) and the deflection rod (683) are driven to finely adjust the displacement of the contact plate (62), adjust the wheel diameter expansion limit of the guide wheel (5), adapt to different ropes, and after winding the rope, the basic tension is completed by the counterweight (3), and the test is started. S2: The rotating disk (72) rotates at a constant speed, and the traction rod (73) drives the pulling rod (71) to swing back and forth, providing alternating traction force for the cable (8). The first oil tank (74) simultaneously supplies oil to the three sets of second oil tanks (76), driving the second piston rods (77) of each set to extend and retract synchronously. S3: During tensioning, the second piston rod (77) pushes the push rod (61), the contact plate (62) presses the contact rod (64), the expansion plate (63) expands the guide wheel (5) to increase the wheel diameter, and the clamping plate (65) cooperates with the friction plate (9) to increase friction tension, simulating the elevator starting loading; S4: When the equipment is running, the rotating disk (72) drives the light-blocking block (13) to rotate continuously, periodically triggering the photoelectric sensor (12) on the device seat (1), capturing the pulse signal in real time and extracting it, automatically counting the number of cable bending cycles, realizing automated detection and accurate and traceable data.

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