Overload limiter of beam carrying machine

Abstract

The invention discloses a beam carrying machine overload limiter, and relates to the technical field of beam carrying machine overload limiters, the beam carrying machine overload limiter comprises a machine body, a mounting rack is fixed on the left side of the machine body, a screw rod is fixed on the side wall of the mounting rack, and a mounting block is arranged on the screw rod. When a nut is screwed into a screw rod to press a mounting block, a circular ring can be extruded, a pushing block is driven to move into the mounting block, and through cooperation of a pressing plate, the pressing plate can be extruded on the screw rod, so that the effect of fixing the mounting block can be achieved; and a certain gap between the mounting block and the screw rod is prevented, so that the mounting block shakes back and forth on the screw rod, the inner side of the mounting block collides with the screw rod, threads of the screw rod are damaged, screwing of a nut into the screw rod in the later period is affected, and the mounting block cannot drive a stress sensor to be pressed on a steel rope for measurement operation.

Description

Technical Field

[0001] The present invention relates to the technical field of overload limiters for beam movers, and specifically provides an overload limiter for beam movers. Background Art

[0002] In the construction and engineering fields, the wide use of beam movers makes them an indispensable tool in projects. However, due to their large quantity, large volume, and complex structure and functions, beam movers face significant risks and potential damage during operation. The occurrence of safety accidents such as overloading or improper operation may lead to delays in project construction progress, and even cause serious safety accidents and economic losses. Therefore, ensuring the safe operation of beam movers is crucial for the overall safety construction of the entire building and engineering projects. According to statistics, up to 60% - 70% of beam mover overturning accidents are caused by overloading of the lifting weight.

[0003] An overload limiter for a beam mover with a patent publication number of CN221500400U includes a frame. An installation cavity is provided on the frame, and a limiting structure is installed in the installation cavity. The limiting structure includes a cross - plate, which is formed by splicing two plates. The bottom of each plate is connected with a movable rod, and the movable rod is connected to the bottom of the installation cavity through a sliding structure. Through - holes for the steel wire rope to pass through are provided on both the cross - plate and the frame. A stress monitoring structure is connected to the steel wire rope, and the stress monitoring structure is connected to a signal generator through a power line. It can detect the stress condition of the steel wire rope with the heavy object in real - time. When overloaded, it will immediately react to avoid the inability to estimate overloading, which may ultimately lead to damage to the beam mover. The overloading stress monitoring is more accurate, so as to improve the service life of the beam mover and the work efficiency of the staff.

[0004] For the above - mentioned overload limiter for beam movers, when the device is fixed at the fixed end of the steel rope, it is always through the installation block sleeved on the screw rod, and then by screwing the nut on the screw rod to limit the installation block on the screw rod, so that the installation block drives the stress sensor to press tightly on the steel wire rope. However, when the installation block is sleeved on the screw rod, there is a certain gap between the installation block and the screw rod. Due to the use of the device outdoors, due to external environmental problems, strong winds may cause the installation block to shake on the screw rod and collide with the screw rod, easily causing damage to the thread on the screw rod, affecting the subsequent pressing and measuring operation of the installation block on the steel wire rope. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides an overload limiter for beam movers, which solves the problems raised in the above - mentioned background art.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: An overload limiter for a beam handling machine, comprising a body. An installation frame is fixed to the left side of the body. A screw rod is fixed to the side wall of the installation frame. An installation block is arranged on the screw rod. A stress sensor is installed inside the installation block. A control panel is fixed to the right side of the body. The control panel is electrically connected to the stress sensor. An alarm is fixed to the top of the body. The alarm is electrically connected to the control panel. A junction box is fixed to the bottom of the body. When the body needs to be installed, the installation block is taken off the screw rod. The groove of the installation frame is placed at the steel rope, so that the steel rope is between two screw rods. By sleeving the installation block on the screw rod, the stress sensor of the installation block is abutted against the steel rope. By using an external nut, the nut is screwed onto the threaded rod so that the nut abuts against the installation block to fix the installation block, and the body is fixed on the steel rope. A positioning device for preventing the installation block from shaking is arranged in the installation block. A protection device for preventing the nut from detaching is arranged on the screw rod. A fixing device for fixing the steel rope is arranged in the installation frame; Among them, the positioning device includes a push block, a circular ring, a pressing plate, a connecting spring, a transmission spring, a hinge rod, an L-shaped block and a centering block; The push block is slidably installed inside the installation block. One side of the connecting spring is fixed to the protruding part inside the installation block. The other side of the connecting spring is fixed to the bottom of the push block. The pressing plate is slidably installed on the inner wall of the installation block. The circular ring is fixed to the top of the push block.

[0007] According to the above technical solution, one side of the transmission spring is fixed to the inside of the installation block, and the other side of the transmission spring is fixed to the side wall of the pressing plate.

[0008] According to the above technical solution, an L-shaped block is slidably installed on the inner wall of the installation block. One end of the hinge rod is hinged to the outer wall of the circular ring, and the other end of the hinge rod is hinged to the top of the L-shaped block. The centering block is fixed to the end of the L-shaped block away from the hinge rod. When the nut presses the installation block, it will cause the nut to squeeze the circular ring and move towards the installation block, causing the push block to move into the installation block. Thus, the inclined surface of the push block will squeeze the inclined surface opened on the inner side of the pressing plate, causing the pressing plate to approach the screw rod under the extrusion force. When the circular ring approaches the installation block, it will cause the circular ring to squeeze the hinge rod, causing the hinge rod to rotate at the hinge, and thus the hinge rod will squeeze the L-shaped block to drive the centering block to move.

[0009] According to the above technical solution, the protection device includes a connecting plate, a long plate, a pressing rod, a transmission column, a return spring, a stop block, a convex block, a return spring, a pressing block, a connecting rod, a handle and a pressing spring; the connecting plate penetrates through the side wall of the mounting block and is slidably connected at the penetration, the long plate is attached to the inner side of the connecting plate, the pressing rod penetrates through the outer wall of the screw rod and is slidably connected at the penetration, and the end point of the pressing rod is fixed to the side wall of the long plate.

[0010] According to the above technical solution, the transmission column is slidably installed in the inner wall of the screw rod, one side of the return spring is fixed to the inner wall of the screw rod, and the other side of the return spring is fixed to the bottom of the transmission column. When the pressing plate drives the connecting plate to move, the connecting plate drives the long plate to move, the pressing rod moves into the screw rod, and the screw rod presses the inclined surface at the bottom of the transmission column, enabling the transmission column to move upward in the screw rod.

[0011] According to the above technical solution, the stop block is slidably installed on the top of the transmission column, one side of the return spring is fixed to the side wall of the stop block, the other side of the return spring is fixed to the inner side of the transmission column, the convex block is fixed to the top of the screw rod, the side wall of the convex block is attached to the inner side of the stop block, the connecting rod penetrates through the top of the stop block and is slidably connected at the penetration, the handle is fixed to the top of the connecting rod, the pressing block is fixed to the bottom of the connecting rod, one side of the pressing spring is fixed to the top of the pressing block, and the other side of the pressing spring is fixed to the inner side of the stop block. When the transmission column moves upward, it can drive the stop block to move upward, so that the stop block moves upward to not contact the convex block, and due to the return spring being in a compressed state, the stop block can move.

[0012] According to the above technical solution, the fixing device includes a transmission block, a movable rod, a pressing plate, an L-shaped connecting block, a wire pressing rod and a rubber plate; the transmission block penetrates through the side wall of the mounting frame and is slidably connected at the penetration, one end of the transmission block is fixed to the side wall of the long plate, the other end of the transmission block is hinged with a movable rod, the pressing plate is slidably installed inside the mounting frame, and the bottom of the mounting frame is hinged with the end of the movable rod away from the transmission block.

[0013] According to the above technical solution, the L-shaped connecting block is fixed to the side wall of the pressing plate and penetrates through the side wall of the mounting frame, the wire pressing rod is fixed to the side of the L-shaped connecting block away from the pressing plate, and the rubber plate is fixed to the bottom of the junction box. When the long plate moves, the transmission block can press the movable rod, causing the movable rod to rotate at the hinge, thereby causing the movable rod to press the pressing plate to move upward. When the pressing plate moves upward, the L-shaped connecting block can drive the wire pressing rod to move.

[0014] The present invention provides an overload limiter for a beam handling machine. It has the following beneficial effects: 1. By setting a positioning device in the present invention, when the nut is screwed onto the screw rod to compress the mounting block, the ring can be extruded, driving the pushing block to move into the mounting block. Through the cooperation of the pressing plate, the pressing plate can be made to press against the screw rod, thereby achieving the effect of fixing the mounting block and preventing a certain gap from existing between the mounting block and the screw rod. Otherwise, the mounting block may shake back and forth on the screw rod, causing the inner side of the mounting block to collide with the screw rod and damaging the thread of the screw rod, affecting the subsequent screwing of the nut onto the screw rod and preventing the mounting block from driving the stress sensor to press against the steel rope for measurement operations. Moreover, when the ring moves towards the mounting block, through the cooperation of the hinge rod, the two centering blocks can be made to approach each other, centering and correcting the steel rope offset in the middle of the mounting block, aligning the stress sensor with the steel rope, and solving the problem that the stress sensor and the steel rope may not be aligned in contact, which may lead to inaccurate measurement data.

[0015] 2. By setting a protective device in the present invention, when the pressing plate approaches the screw rod, it can drive the connecting plate to move, so that the long plate can drive the extrusion rod to extrude the inclined surface at the bottom of the transmission column. Thus, the transmission column can drive the block to move to a position where it does not contact the convex block. Through the cooperation of the return spring, the block can be moved to the periphery of the screw rod, achieving the effect of blocking the nut screwed onto the screw rod and solving the problem that the nut may loosen and fall off the screw rod, resulting in the inability of the machine body to be fixed and detected on the steel rope. Moreover, when the block drives the pressing block to move away from the top of the screw rod, since the pressing spring is in a compressed state, the pressing spring can drive the pressing block to move towards the mounting block, pressing the pressing block against the nut screwed onto the screw rod, thereby achieving the effect of preventing the nut from loosening and solving the problem that the nut loosening on the screw rod affects the contact between the stress sensor and the steel rope, resulting in the inability to normally detect the stress of the heavy object on the steel rope.

[0016] 3. By setting a fixing device in the present invention, when the long plate moves, the transmission block can be made to move into the mounting frame, so that the transmission block squeezes the movable rod, causing the movable rod to rotate at the hinge, and then the movable rod can squeeze the extrusion plate, enabling the extrusion plate to move out of the mounting frame. Thus, the extrusion plate can move out of the mounting frame to press the steel rope between the mounting block and the mounting frame, making the steel rope abut against the stress sensor, so that the steel rope and the stress sensor can be in close contact, making the measurement result more accurate. Moreover, when the extrusion plate moves, through the cooperation of the L-shaped connecting block, the wire pressing rod can be driven to press the wire harness at the bottom of the junction box against the rubber plate, pressing the wire harness connected to the junction box and solving the problem that the wire harness may loosen from the junction box due to the vibration that may occur during the operation of the beam hoisting machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic structural diagram of the overall device of the present invention; Figure 3 It is a schematic structural diagram of the mounting bracket of the present invention; Figure 4 It is a schematic cross-sectional structural diagram of the mounting bracket of the present invention; Figure 5 It is a schematic cross-sectional structural diagram of the mounting block of the present invention; Figure 6 It is a schematic diagram of the local structure of the present invention; Figure 7 For the present invention Figure 6 Schematic enlarged view of structure A.

[0018] In the figure: 1, body; 2, mounting bracket; 3, screw; 4, mounting block; 5, control panel; 6, junction box; 7, stress sensor; 81, push block; 82, ring; 83, pressing plate; 84, connecting spring; 85, transmission spring; 86, hinge rod; 87, L-shaped block; 88, centering block; 91, connecting plate; 92, long plate; 93, extrusion rod; 94, transmission column; 95, return spring; 96, stop block; 97, return spring; 98, convex block; 99, connecting rod; 910, pressing block; 911, pressing spring; 912, handle; 101, transmission block; 102, movable rod; 103, extrusion plate; 104, L-shaped connecting block; 105, wire pressing rod; 106, rubber plate; 11, alarm. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1-7, an embodiment of the present invention is: an overload limiter for a beam transporter, comprising a body 1, a mounting bracket 2 is fixed to the left side of the body 1, a screw rod 3 is fixed to the side wall of the mounting bracket 2, a mounting block 4 is arranged on the screw rod 3, a stress sensor 7 is installed inside the mounting block 4, a control panel 5 is fixed to the right side of the body 1, and the control panel 5 is electrically connected to the stress sensor 7. An alarm 11 is fixed to the top of the body 1, and the alarm 11 is electrically connected to the control panel 5. A junction box 6 is fixed to the bottom of the body 1. A positioning device for preventing the mounting block 4 from shaking is arranged in the mounting block 4; wherein, the positioning device includes a push block 81, a ring 82, a pressing plate 83, a connecting spring 84, a transmission spring 85, a hinge rod 86, an L-shaped block 87 and a centering block 88; the push block 81 is slidably installed inside the mounting block 4, and the push block 81 can slide up and down inside the mounting block 4. One side of the connecting spring 84 is fixed to the inner protrusion of the mounting block 4, and the other side of the connecting spring 84 is fixed to the bottom of the push block 81. The pressing plate 83 is slidably installed on the inner wall of the mounting block 4, and the pressing plate 83 can slide left and right on the inner wall of the mounting block 4. The ring 82 is fixed to the top of the push block 81. One side of the transmission spring 85 is fixed to the inside of the mounting block 4, and the other side of the transmission spring 85 is fixed to the side wall of the pressing plate 83. The pressing plate 83 is made of rubber. An L-shaped block 87 is slidably installed on the inner wall of the mounting block 4, and the L-shaped block 87 can slide left and right on the inner wall of the mounting block 4. One end of the hinge rod 86 is hinged to the outer wall of the ring 82, and the other end of the hinge rod 86 is hinged to the top of the L-shaped block 87. The centering block 88 is fixed to the end of the L-shaped block 87 away from the hinge rod 86.

[0021] When the nut is screwed onto the screw rod 3 to press the mounting block 4, the ring 82 can be extruded, driving the push block 81 to move into the mounting block 4. Through the cooperation of the pressing plate 83, the pressing plate 83 can be made to press against the screw rod 3, thereby achieving the effect of fixing the mounting block 4 and preventing a certain gap between the mounting block 4 and the screw rod 3, which may cause the mounting block 4 to shake back and forth on the screw rod 3, resulting in the inner side of the mounting block 4 colliding with the screw rod 3 and damaging the thread of the screw rod 3, affecting the subsequent screwing of the nut onto the screw rod 3 and preventing the mounting block 4 from driving the stress sensor 7 to press against the steel rope for measurement operation; There are two sets of centering blocks 88, and the two sets of centering blocks 88 are symmetrically arranged with the center line in the vertical direction of the mounting block 4 as the axis of symmetry. When the ring 82 moves towards the mounting block 4, through the cooperation of the hinge rod 86, the two sets of centering blocks 88 can be made to approach each other, centering and correcting the steel rope offset in the middle of the mounting block 4, aligning the stress sensor 7 with the steel rope, and solving the problem that the stress sensor 7 and the steel rope are not aligned in contact, which may cause inaccurate measurement data.

[0022] During the operation of this embodiment: When the machine body 1 needs to be used, the mounting block 4 is removed from the screw rod 3. The groove of the mounting frame 2 is fitted to the fixed end of the steel rope on the beam hoist, and the mounting block 4 is sleeved on the screw rod 3 so that the stress sensor 7 is attached to the steel rope. An external nut is screwed onto the screw rod 3 to press the mounting block 4, causing the mounting block 4 to press on the steel rope and fixing the machine body 1 on the steel rope, enabling the equipment to be used. When the weight on the steel rope is overloaded, the stress sensor 7 will sense the stress on the steel rope, and the stress sensor 7 will transmit an electrical signal to the control panel 5, causing the control panel 5 to control the alarm 11 to start, thereby prompting the staff not to lift the item with the steel rope anymore to prevent the item from being overloaded and causing the steel rope to break. Moreover, when the nut is screwed onto the screw rod 3, the nut will squeeze the ring 82, causing the ring 82 to move towards the mounting block 4. As a result, the ring 82 will drive the push block 81 to move into the mounting block 4, compressing the connecting spring 84. When the push block 81 moves, the inclined surface of the protrusion on the side wall of the push block 81 can squeeze the inner inclined surface of the groove of the pressing plate 83, enabling the pressing plate 83 to move closer to the screw rod 3. And when the pressing plate 83 moves closer to the screw rod 3, the transmission spring 85 will be stretched, allowing the push block 81 to push the pressing plate 83 to press and fix the screw rod 3, thereby fixing the mounting block 4 on the screw rod 3. When the ring 82 moves towards the mounting block 4, the ring 82 will squeeze the hinge rod 86, causing the hinge rod 86 to rotate at the hinge, enabling the hinge rod 86 to squeeze the L-shaped block 87 to move, so that the L-shaped block 87 drives the two centering blocks 88 to approach each other, and the centering blocks 88 push the offset steel rope to make the steel rope in the middle position of the mounting block 4.

[0023] When the nut is turned to release the extrusion on the ring 82, since the connecting spring 84 is in a compressed state, the connecting spring 84 will drive the push block 81 to reset, so that the protrusion of the push block 81 does not squeeze the pressing plate 83. Since the transmission spring 85 is in a stretched state, the transmission spring 85 will drive the pressing plate 83 to reset, so that the pressing plate 83 does not press the screw rod 3, and the mounting block 4 can be removed from the screw rod 3. Moreover, when the ring 82 resets, the ring 82 will pull the hinge rod 86, enabling the L-shaped block 87 to drive the two centering blocks 88 to move away from each other for reset.

[0024] Please refer to Figures 1-7, on the basis of the above embodiments, in another embodiment of the present invention, a protection device for preventing the nut from detaching is provided on the screw rod 3, and a fixing device for fixing the steel rope is provided in the mounting frame 2. The protection device includes a connecting plate 91, a long plate 92, a pressing rod 93, a transmission column 94, a return spring 95, a stopper 96, a convex block 98, a return spring 97, a pressing block 910, a connecting rod 99, a handle 912 and a pressing spring 911; the connecting plate 91 penetrates through the side wall of the mounting block 4 and is slidably connected at the penetration point. The long plate 92 is attached to the inner side of the connecting plate 91. The pressing rod 93 penetrates through the outer wall of the screw rod 3 and is slidably connected at the penetration point. The end point of the pressing rod 93 is fixed to the side wall of the long plate 92. The transmission column 94 is slidably installed in the inner wall of the screw rod 3. One side of the return spring 95 is fixed to the inner wall of the screw rod 3, and the other side of the return spring 95 is fixed to the bottom of the transmission column 94. The stopper 96 is slidably installed on the top of the transmission column 94. One side of the return spring 97 is fixed to the side wall of the stopper 96, and the other side of the return spring 97 is fixed to the inner side of the transmission column 94. The convex block 98 is fixed to the top of the screw rod 3, and the side wall of the convex block 98 is in contact with the inner side of the stopper 96. The connecting rod 99 penetrates through the top of the stopper 96 and is slidably connected at the penetration point. The handle 912 is fixed to the top of the connecting rod 99. The pressing block 910 is fixed to the bottom of the connecting rod 99. One side of the pressing spring 911 is fixed to the top of the pressing block 910, and the other side of the pressing spring 911 is fixed to the inner side of the stopper 96.

[0025] When the mounting block 4 is sleeved on the screw rod 3, the middle through hole of the connecting plate 91 needs to be sleeved on the long plate 92 together.

[0026] When the pressing plate 83 approaches the screw rod 3, it can drive the connecting plate 91 to move, so that the long plate 92 can drive the pressing rod 93 to press the inclined surface at the bottom of the transmission column 94, so that the transmission column 94 can drive the stopper 96 to move to a position where it does not contact the convex block 98. With the cooperation of the return spring 97, the stopper 96 can move to the periphery of the screw rod 3, which can block the nut screwed onto the screw rod 3, solving the problem that the nut loosens and falls off the screw rod 3, resulting in the body 1 being unable to be fixed and detected on the steel rope. And when the stopper 96 drives the pressing block 910 to move away from the top of the screw rod 3, since the pressing spring 911 is in a compressed state, the pressing spring 911 can drive the pressing block 910 to move towards the mounting block 4, so that the pressing block 910 presses on the nut screwed onto the screw rod 3, which can prevent the nut from loosening, solving the problem that the nut loosens on the screw rod 3, affecting the contact between the stress sensor 7 and the steel rope, resulting in the inability to normally detect the stress of the heavy object on the steel rope.

[0027] The fixing device includes a transmission block 101, a movable rod 102, a pressing plate 103, an L-shaped connecting block 104, a wire pressing rod 105 and a rubber plate 106; the transmission block 101 penetrates through the side wall of the mounting bracket 2, and is slidably connected at the penetration point. One end of the transmission block 101 is fixed to the side wall of the long plate 92, and the other end of the transmission block 101 is hinged to the movable rod 102. The pressing plate 103 is slidably installed inside the mounting bracket 2. The bottom of the mounting bracket 2 is hinged to the end of the movable rod 102 away from the transmission block 101. The L-shaped connecting block 104 is fixed to the side wall of the pressing plate 103, and the L-shaped connecting block 104 penetrates through the side wall of the mounting bracket 2. The wire pressing rod 105 is fixed to the side of the L-shaped connecting block 104 away from the pressing plate 103. The rubber plate 106 is fixed to the bottom of the junction box 6.

[0028] When the long plate 92 moves, it can make the transmission block 101 move into the mounting bracket 2, so that the transmission block 101 squeezes the movable rod 102, causing the movable rod 102 to rotate at the hinge point. Thus, the movable rod 102 can squeeze the pressing plate 103, enabling the pressing plate 103 to move out of the mounting bracket 2, pressing the steel wire rope between the mounting block 4 and the mounting bracket 2, making the steel wire rope abut against the stress sensor 7, so that the steel wire rope can be in close contact with the stress sensor 7, making the measurement result more accurate. And when the pressing plate 103 moves, through the cooperation of the L-shaped connecting block 104, it can drive the wire pressing rod 105 to press the wire harness at the bottom of the junction box 6 onto the rubber plate 106, pressing the wire harness connected to the junction box 6, and solving the problem that the wire harness may become loose from the junction box 6 due to the vibration that may occur during the operation of the beam handling machine.

[0029] During the operation of this embodiment: When the pressing plate 83 approaches the screw rod 3, when the pressing plate 83 drives the connecting plate 91 to move, the inner side of the connecting plate 91 will squeeze the long plate 92, so that the long plate 92 approaches the mounting bracket 2, and then the extrusion rod 93 will extend into the screw rod 3, and the extrusion rod 93 will squeeze the bottom slope of the transmission column 94. Since the transmission column 94 moves upward under the extrusion force, the return spring 95 will be stretched. When the transmission column 94 moves upward, it drives the stopper 96 to move upward. When the stopper 96 moves upward and does not contact the convex block 98, since the return spring 97 is in a compressed state, the return spring 97 can drive the stopper 96 to move, so that the stopper 96 moves out of the screw rod 3, and then the stopper 96 will block the nut to prevent the nut from loosening from the screw rod 3. And when the stopper 96 moves out of the screw rod 3, the pressing block 910 will not contact the screw rod 3. Since the pressing spring 911 is in a compressed state, the pressing spring 911 can drive the pressing block 910 to move towards the mounting block 4, and the pressing block 910 can press on the nut screwed on the outer wall of the screw rod 3, so as to prevent the steel rope from driving the machine body 1 to shake and cause the nut to loosen from the screw rod 3, which affects the detection operation of the stress sensor 7. And when the nut is removed from the screw rod 3, the handle 912 can be pulled, so that the pressing block 910 moves towards the stopper 96, compressing the pressing spring 911, and then moving the stopper 96 into the transmission column 94, compressing the return spring 97, so that the stopper 96 no longer blocks the nut. When the nut is screwed until it does not squeeze the ring 82, when the pressing plate 83 moves away from the screw rod 3 without the extrusion force, the pressing plate 83 will drive the connecting plate 91 to reset, and then the connecting plate 91 will push the long plate 92 away from the mounting bracket 2, so that the extrusion rod 93 no longer squeezes the bottom of the transmission column 94. Since the return spring 95 is in a stretched state, the return spring 95 will drive the transmission column 94 to move into the screw rod 3, driving the stopper 96 to reset, and the convex block 98 will block and limit the stopper 96 for the next nut blocking operation.

[0030] While the long board 92 moves into the mounting bracket 2, it can drive the transmission block 101 to move, so that the transmission block 101 squeezes the movable rod 102, causing the movable rod 102 to rotate at the hinge, thereby enabling the movable rod 102 to squeeze the pressing plate 103 to move upward, so that the pressing plate 103 moves out of the mounting bracket 2 and presses on the steel rope, thereby enabling the steel rope to be tightly pressed on the stress sensor 7. And when the pressing plate 103 moves out of the mounting bracket 2, the pressing plate 103 drives the L-shaped connecting block 104 to move, so that the wire pressing rod 105 approaches the rubber plate 106, and the wire harness at the bottom of the junction box 6 is pressed tightly on the rubber plate 106 by the wire pressing rod 105. And when the long board 92 moves away from the mounting bracket 2 and resets, the long board 92 can drive the transmission block 101 to move out of the mounting bracket 2, pull the movable rod 102, causing the movable rod 102 to rotate at the hinge, so that the movable rod 102 drives the pressing plate 103 to extend into the mounting bracket 2. When the pressing plate resets, it can drive the L-shaped connecting block 104 and the wire pressing rod 105 away from the rubber plate 106, releasing the pressing on the wire harness.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An overload limiter for a beam handling machine, comprising a machine body (1), characterized in that: A mounting bracket (2) is fixed to the left side of the body (1). A screw rod (3) is fixed to the side wall of the mounting bracket (2). An installation block (4) is arranged on the screw rod (3). A stress sensor (7) is installed inside the installation block (4). A control panel (5) is fixed to the right side of the body (1). The control panel (5) is electrically connected to the stress sensor (7). An alarm (11) is fixed to the top of the body (1). The alarm (11) is electrically connected to the control panel (5). A junction box (6) is fixed to the bottom of the body (1). A positioning device for preventing the installation block (4) from shaking is arranged in the installation block (4). A protection device for preventing the nut from detaching is arranged on the screw rod (3). A fixing device for fixing the steel rope is arranged in the mounting bracket (2); Among them, the positioning device includes a pushing block (81), a ring (82), a pressing plate (83), a connecting spring (84), a transmission spring (85), a hinge rod (86), an L-shaped block (87) and a centering block (88); the pushing block (81) is slidably installed inside the installation block (4). One side of the connecting spring (84) is fixed to the inner protrusion of the installation block (4). The other side of the connecting spring (84) is fixed to the bottom of the pushing block (81). The pressing plate (83) is slidably installed on the inner wall of the installation block (4). The ring (82) is fixed to the top of the pushing block (81).

2. The overload limiter of a beam transfer machine according to claim 1, characterized in that: One side of the transmission spring (85) is fixed to the inside of the installation block (4). The other side of the transmission spring (85) is fixed to the side wall of the pressing plate (83).

3. The overload limiter of a beam transporter according to claim 2, characterized in that: An L-shaped block (87) is slidably installed on the inner wall of the installation block (4). One end of the hinge rod (86) is hinged to the outer wall of the ring (82). The other end of the hinge rod (86) is hinged to the top of the L-shaped block (87). The centering block (88) is fixed to the end of the L-shaped block (87) away from the hinge rod (86).

4. The overload limiter of a beam transfer machine according to claim 1, characterized in that: The protection device includes a connecting plate (91), a long plate (92), an extrusion rod (93), a transmission column (94), a return spring (95), a stop block (96), a convex block (98), a return spring (97), a pressing block (910), a connecting rod (99), a handle (912) and a pressing spring (911); the connecting plate (91) penetrates through the side wall of the installation block (4), and is slidably connected at the penetration. The long plate (92) is attached to the inside of the connecting plate (91). The extrusion rod (93) penetrates through the outer wall of the screw rod (3), and is slidably connected at the penetration. The end point of the extrusion rod (93) is fixed to the side wall of the long plate (92).

5. The overload limiter of a beam transfer machine according to claim 4, characterized in that: The transmission column (94) is slidably installed in the inner wall of the screw rod (3). One side of the return spring (95) is fixed to the inner wall of the screw rod (3). The other side of the return spring (95) is fixed to the bottom of the transmission column (94).

6. The overload limiter of a beam transporter according to claim 5, characterized in that: The stopper (96) is slidably mounted on the top of the transmission column (94). One side of the return spring (97) is fixed to the side wall of the stopper (96), and the other side of the return spring (97) is fixed to the inner side of the transmission column (94). The convex block (98) is fixed to the top of the screw (3). The side wall of the convex block (98) is in contact with the inner side of the stopper (96). The connecting rod (99) passes through the top of the stopper (96) and is slidably connected at the passing-through position. The handle (912) is fixed to the top of the connecting rod (99), the pressing block (910) is fixed to the bottom of the connecting rod (99), one side of the pressing spring (911) is fixed to the top of the pressing block (910), and the other side of the pressing spring (911) is fixed to the inner side of the stopper (96).

7. The overload limiter of a beam transporter according to claim 1, characterized in that: The fixing device includes a transmission block (101), a movable rod (102), a pressing plate (103), an L-shaped connecting block (104), a wire pressing rod (105) and a rubber plate (106). The transmission block (101) passes through the side wall of the mounting bracket (2) and is slidably connected at the passing-through position. One end of the transmission block (101) is fixed to the side wall of the long plate (92), and the other end of the transmission block (101) is hinged to the movable rod (102). The pressing plate (103) is slidably mounted inside the mounting bracket (2), and the bottom of the mounting bracket (2) is hinged to the end of the movable rod (102) away from the transmission block (101).

8. The overload limiter of a beam transporter according to claim 7, characterized in that: The L-shaped connecting block (104) is fixed to the side wall of the pressing plate (103) and passes through the side wall of the mounting bracket (2). The wire pressing rod (105) is fixed to the side of the L-shaped connecting block (104) away from the pressing plate (103), and the rubber plate (106) is fixed to the bottom of the junction box (6).

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