An overload limiter for a beam moving machine

Abstract

The present invention discloses an overload limiter for a beam moving machine, relating to the technical field of overload limiters for beam moving machines, the overload limiter for the beam moving machine comprises a machine body, a mounting bracket is fixed on the left side of the machine body, a screw is fixed on the side wall of the mounting bracket, and a mounting block is arranged on the screw, and the overload limiter of the beam moving machine is provided with a positioning device, when the nut is screwed into the screw to press the mounting block, the circular ring can be squeezed, and the pushing block can be driven to move toward the mounting block, and the pressing plate can be pressed on the screw by the cooperation of the pressing plate, so as to have the effect of fixing the mounting block, and prevent a certain gap between the mounting block and the screw, which will cause the mounting block to rock back and forth on the screw, and cause the inner side of the mounting block to collide with the screw to cause damage to the screw thread, thereby affecting the subsequent screwing of the nut into the screw, so that the mounting block cannot drive the stress sensor to be pressed on the steel rope for measurement operation.

Description

Technical Field

[0001] The invention relates to the technical field of overload limiters for beam moving machines, in particular to an overload limiter for beam moving machines. Background Art

[0002] The widespread use of beam movers in the construction and engineering fields makes them an indispensable tool for projects. However, due to their large number, bulky size, and complex structure and functions, beam movers face significant dangers and potential damage during operation. Safety accidents such as overloading or improper operation can hinder project progress and even cause serious safety accidents and economic losses. Therefore, ensuring the safe operation of beam movers is crucial to the safe construction of the entire construction and engineering project process. According to statistics, as many as 60% to 70% of beam mover overturning accidents are caused by overloading the lifting weight.

[0003] Patent publication number CN221500400U discloses an overload limiter for a beam mover, comprising a frame with a mounting cavity in which a limiting structure is mounted. The limiting structure comprises a cross plate formed from two panels, each of which is connected to a movable rod at the bottom, which is connected to the bottom of the mounting cavity via a sliding structure. Both the cross plate and the frame are provided with through holes for the passage of a steel wire rope. A force monitoring structure is connected to the steel wire rope, which is connected to a signal generator via a power cord. The device can detect the stress of the steel wire rope in real time and respond immediately when overloaded, preventing unpredictable overloads that could damage the beam mover. Overload stress monitoring is more accurate, extending the service life of the beam mover and improving the efficiency of personnel.

[0004] The above-mentioned beam moving machine overload limiter, when the equipment is fixed to the fixed end of the steel rope, is all done by putting the mounting block on the screw rod, and then by screwing the nut on the screw rod, the nut limits the mounting block on the screw rod, so that the mounting block drives the stress sensor to be pressed against the steel rope. However, when the mounting block is put on the screw rod, there is a certain gap between the mounting block and the screw rod. It may be because the equipment is used outdoors, due to external environmental problems, strong winds may cause the mounting block to shake on the screw rod, colliding with the screw rod, and easily causing damage to the thread on the screw rod, affecting the subsequent measurement operation of the mounting block pressing the steel rope. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides an overload limiter for a beam moving machine, which solves the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an overload limiter for a beam moving machine, comprising a machine body, a mounting bracket fixed on the left side of the machine body, a screw fixed on the side wall of the mounting bracket, a mounting block provided on the screw, a stress sensor installed on the inner side of the mounting block, a control panel fixed on the right side of the machine body, the control panel and the stress sensor are electrically connected, an alarm fixed on the top of the machine body, the alarm and the control panel are electrically connected, a junction box fixed on the bottom of the machine body, and when the machine body needs to be repaired During installation, the mounting block is removed from the screw rod, and the groove of the mounting frame is placed on the steel rope so that the steel rope is between the two sets of screw rods. The mounting block is put on the screw rod so that the stress sensor of the mounting block is against the steel rope. The external nut is screwed onto the threaded rod so that the nut is against the mounting block, and the mounting block is fixed so that the machine body is fixed on the steel rope. The mounting block is provided with a positioning device to prevent the mounting block from shaking, and the screw rod is provided with a protective device to prevent the nut from detaching. The mounting frame is provided with a fixing device to fix the steel rope.

[0007] In which, the positioning device includes a pushing block, a circular ring, a clamping plate, a connecting spring, a transmission spring, a hinged rod, an L-shaped block and a centering block; the pushing block is slidably installed on the inner side of the mounting block, one side of the connecting spring is fixed to the inner protrusion of the mounting block, and the other side of the connecting spring is fixed to the bottom of the pushing block, the clamping plate is slidably installed on the inner wall of the mounting block, and the circular ring is fixed to the top of the pushing block.

[0008] According to the above technical solution, one side of the transmission spring is fixed to the inner side of the mounting block, and the other side of the transmission spring is fixed to the side wall of the pressing plate.

[0009] When the ring approaches the mounting block, the ring will squeeze the hinged rod, causing the hinged rod to rotate at the hinge point, thereby causing the hinged rod to squeeze the L-shaped block and drive the centering block to move.

[0010] According to the above technical solution, the protective device includes a connecting plate, a long plate, an extrusion rod, a transmission column, a reset spring, a block, a protrusion, a return spring, a pressure block, a connecting rod, a handle and a compression spring; the connecting plate passes through the side wall of the mounting block and is slidably connected at the penetration point, the long plate is attached to the inner side of the connecting plate, the extrusion rod passes through the outer wall of the screw rod and is slidably connected at the penetration point, and the end point of the extrusion rod is fixed to the side wall of the long plate.

[0011] According to the above technical solution, the transmission column is slidably installed on the inner wall of the screw, one side of the return spring is fixed to the inner wall of the screw, and the other side of the return spring is fixed to the bottom of the transmission column. When the clamping plate drives the connecting plate to move, the connecting plate drives the long plate to move, causing the extrusion rod to move into the screw, so that the screw squeezes the inclined surface at the bottom of the transmission column, enabling the transmission column to move upward in the screw.

[0012] According to the above technical solution, the 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 block, and the other side of the return spring is fixed to the inner side of the transmission column, the protrusion is fixed to the top of the screw, and the side wall of the protrusion is fitted with the inner side of the block, the connecting rod passes through the top of the block and is slidably connected at the penetration point, the handle is fixed to the top of the connecting rod, the pressure block is fixed to the bottom of the connecting rod, one side of the compression spring is fixed to the top of the pressure block, and the other side of the compression spring is fixed to the inner side of the block. When the transmission column moves upward, it can drive the block to move upward, so that the block moves upward and does not contact the protrusion, so that the return spring is in a compressed state, and the block can move.

[0013] According to the above technical solution, the fixing device includes a transmission block, a movable rod, an extrusion plate, an L-shaped connecting block, a wire pressing rod and a rubber plate; the transmission block passes through the side wall of the mounting frame and is slidably connected at the penetration point, one end of the transmission block is fixed to the side wall of the long board, and the other end of the transmission block is hinged to the movable rod, the extrusion plate is slidably installed on the inner side of the mounting frame, and the bottom of the mounting frame is hinged to the end of the movable rod away from the transmission block.

[0014] According to the above technical solution, the L-shaped connecting block is fixed to the side wall of the extrusion plate, and the L-shaped connecting block passes 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 extrusion plate, and the rubber plate is fixed to the bottom of the junction box. When the long plate moves, the transmission block can squeeze the movable rod, causing the movable rod to rotate at the hinge, so that the movable rod squeezes the extrusion plate to move upward, and when the extrusion plate moves upward, the L-shaped connecting block can drive the wire pressing rod to move.

[0015] The present invention provides an overload limiter for a beam moving machine. It has the following beneficial effects:

[0016] The present invention provides a positioning device, and when the nut is screwed into the screw rod to press the mounting block, the circular ring can be squeezed, driving the pushing block to move toward the mounting block. Through the cooperation of the pressing plate, the pressing plate can be squeezed on the screw rod, thereby fixing the mounting block, preventing a certain gap between the mounting block and the screw rod, which would cause the mounting block to rock back and forth on the screw rod, causing the inner side of the mounting block to collide with the screw rod and damage the screw thread, affecting the subsequent screwing of the nut onto the screw rod, so that the mounting block cannot drive the stress sensor to press on the steel rope for measurement operation; and when the circular ring moves toward the mounting block, through the cooperation of the hinged rod, the two sets of centering blocks can be brought close to each other, the steel rope offset in the middle of the mounting block can be centered and corrected, so that the stress sensor and the steel rope are aligned, solving the problem that the stress sensor and the steel rope are not aligned and contacted, which may cause inaccurate measurement data.

[0017] When the cam is in a position to move relative to the top of the screw rod, the cam is in a position to move relative to the top of the screw rod, thereby preventing the cam from coming off the top of the screw rod and causing the cam to come off the top of the screw rod and causing the cam to come off the top of the screw rod.

[0018] 3. The present invention provides a fixing device. When the long board moves, the transmission block can move toward the inside of the mounting frame, so that the transmission block squeezes the movable rod, and the movable rod rotates at the hinge, so that the movable rod squeezes the extrusion plate, so that the extrusion plate can be moved out of the mounting frame, and the steel rope between the mounting block and the mounting frame is compressed, so that the steel rope is against the stress sensor, so that the steel rope and the stress sensor are in close contact, and the measurement result is more accurate; and when the extrusion plate moves, through the cooperation of the L-shaped connecting block, it can drive the wire pressing rod to press the wiring harness at the bottom of the junction box against the rubber plate, and compress the wiring harness connected to the junction box, thereby solving the problem that the wiring harness may be loosened from the junction box due to vibration that may be generated when the beam moving machine is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the overall device of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the mounting frame of the present invention;

[0022] Figure 4 It is a schematic structural diagram of a cross-section of the mounting frame of the present invention;

[0023] Figure 5 This is a schematic structural diagram of a cross-section of the mounting block of the present invention;

[0024] Figure 6 It is a schematic diagram of the local structure of the present invention;

[0025] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the A structure.

[0026] In the figure: 1. body; 2. mounting frame; 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. hinged rod; 87. L-shaped block; 88. centering block; 91. connecting plate; 92. long plate; 93. extrusion rod; 94. transmission column; 95. reset spring; 96. stop block; 97. return spring; 98. bump; 99. connecting rod; 910. pressure 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 sheet; 11. alarm. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 7, one embodiment of the present invention is: a beam moving machine overload limiter, including a body 1, a mounting frame 2 is fixed to the left side of the body 1, a screw 3 is fixed to the side wall of the mounting frame 2, a mounting block 4 is provided on the screw 3, a stress sensor 7 is installed on the inner side of the mounting block 4, a control panel 5 is fixed to the right side of the body 1, the control panel 5 and the stress sensor 7 are electrically connected, an alarm 11 is fixed to the top of the body 1, the alarm 11 and the control panel 5 are electrically connected, a junction box 6 is fixed to the bottom of the body 1, and a positioning device is provided in the mounting block 4 to prevent the mounting block 4 from shaking; wherein the positioning device includes a pushing block 81, a ring 82, a pressing plate 83, a connecting spring 84, a transmission spring 85, a hinged rod 86, an L-shaped block 87 and a centering block 88; the pushing block 81 is slidably installed on the inner side of the mounting block 4, and the pushing block 81 can The lever 84 is fixed to the top of the lever 84 and the lever 85 is secured to the top of the lever 84 so that the lever 84 can be unlocked and unlocked.

[0029] When the nut is screwed into the screw rod 3 to press the mounting block 4, the ring 82 is squeezed, and the pushing block 81 is driven to move toward the mounting block 4. The pressing plate 83 cooperates with the pressing plate 83 to squeeze the screw rod 3, thereby fixing the mounting block 4 and preventing a certain gap between the mounting block 4 and the screw rod 3, which would cause the mounting block 4 to rock back and forth on the screw rod 3, causing the inner side of the mounting block 4 to collide with the screw rod 3 and damage the thread of the screw rod 3, affecting the subsequent screwing of the nut into the screw rod 3, and making it impossible for the mounting block 4 to drive the stress sensor 7 to press on the steel rope for measurement.

[0030] There are two groups of centering blocks 88, and the two groups of centering blocks 88 are symmetrically arranged with the center line of the mounting block 4 in the vertical direction as the axis of symmetry. When the ring 82 moves toward the mounting block 4, the two groups of centering blocks 88 can be brought close to each other through the cooperation of the hinged rod 86, and the steel rope offset in the middle of the mounting block 4 can be centered and corrected, so that the stress sensor 7 is aligned with the steel rope, which solves the problem that the stress sensor 7 and the steel rope are not aligned and in contact, which may cause inaccurate measurement data.

[0031] When this embodiment is working: when the machine body 1 needs to be used, the mounting block 4 is removed from the screw rod 3, and the groove of the mounting frame 2 is fitted to the fixed end of the steel rope on the beam moving machine, the mounting block 4 is put onto the screw rod 3, so that the stress sensor 7 is fitted on the steel rope, and the external nut is screwed into the screw rod 3 so that the nut presses the mounting block 4 tightly, so that the mounting block 4 is pressed tightly on the steel rope, so that the machine body 1 is fixed on the steel rope, and the equipment can be used. When the weight on the steel rope is overloaded, the stress sensor 7 will feel the stress on the steel rope, and the stress sensor 7 will transmit an electrical signal to the control panel 5, so that the control panel 5 controls the alarm 11 to be activated, thereby prompting the staff to no longer lift the object through the steel rope to prevent the weight of the object from being overloaded and causing the steel rope to break. When the nut is screwed onto the screw 3, the nut will squeeze the ring 82, causing the ring 82 to move toward the mounting block 4. When the pressing plate 83 is moved closer to the screw rod 3, the transmission spring 85 is stretched, so that the pushing block 81 can 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 toward the mounting block 4, the ring 82 squeezes the hinge rod 86, causing the hinge rod 86 to rotate at the hinge, thereby causing the hinge rod 86 to squeeze the L-shaped block 87 to move, thereby causing the L-shaped block 87 to drive the two sets of center blocks 88 to approach each other, causing the center block 88 to push the offset steel rope, so that the steel rope is in the middle position of the mounting block 4.

[0032] When the nut is turned to release the squeeze on the ring 82, the connecting spring 84 is in a compressed state, which will cause the connecting spring 84 to drive the pushing block 81 to reset, so that the protrusion of the pushing block 81 will not squeeze the clamping plate 83. Since the transmission spring 85 is in a stretched state, the transmission spring 85 will drive the clamping plate 83 to reset, so that the clamping plate 83 will not press the screw 3. The mounting block 4 can be removed from the screw 3, and when the ring 82 is reset, the ring 82 will pull the hinged rod 86, so that the L-shaped block 87 can drive the two groups of center blocks 88 away from each other for reset.

[0033] See also Figure 1-Figure 7On the basis of the above embodiment, in another embodiment of the present invention, a protective device is provided on the screw rod 3 to prevent the nut from detaching, and a fixing device for fixing the steel rope is provided in the mounting frame 2. The protective device includes a connecting plate 91, a long plate 92, an extrusion rod 93, a transmission column 94, a reset spring 95, a stopper 96, a protrusion 98, a return spring 97, a pressure block 910, a connecting rod 99, a handle 912 and a compression spring 911; the connecting plate 91 passes 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 extrusion rod 93 passes through the outer wall of the screw rod 3 and is slidably connected at the penetration point, the end point of the extrusion rod 93 is fixed to the side wall of the long plate 92, and the transmission column 94 is slidably mounted on the screw 3, one side of the return spring 95 is fixed to the inner wall of the screw 3, 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, the other side of the return spring 97 is fixed to the inner side of the transmission column 94, the protrusion 98 is fixed to the top of the screw 3, the side wall of the protrusion 98 fits 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 penetration point, the handle 912 is fixed to the top of the connecting rod 99, the pressure block 910 is fixed to the bottom of the connecting rod 99, one side of the compression spring 911 is fixed to the top of the pressure block 910, and the other side of the compression spring 911 is fixed to the inner side of the stopper 96.

[0034] 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 .

[0035] 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 extrusion rod 93 to squeeze the inclined surface at the bottom of the transmission column 94, so that the transmission column 94 can drive the stopper 96 to move so as not to contact the protrusion 98. The cooperation of the return spring 97 can move the stopper 96 to the periphery of the screw rod 3, which can block the nut screwed into the screw rod 3, thereby solving the problem that the nut is loosened and falls off from the screw rod 3, resulting in the body 1 being unable to be fixed on the steel rope for detection;

[0036] And when the stop block 96 drives the pressure block 910 to move away from the top of the screw rod 3, the compression spring 911 is in a compressed state, so that the compression spring 911 can drive the pressure block 910 to move toward the mounting block 4, so that the pressure block 910 is pressed tightly on the nut screwed into the screw rod 3, thereby preventing 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, and making it impossible to detect the stress of the heavy object on the steel rope normally.

[0037] The fixing device includes a transmission block 101, a movable rod 102, an extrusion 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 frame 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 with a movable rod 102. The extrusion plate 103 is slidably installed on the inner side of the mounting frame 2. The bottom of the mounting frame 2 is hinged to one 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 extrusion plate 103, and the L-shaped connecting block 104 passes through the side wall of the mounting frame 2. The wire pressing rod 105 is fixed to the side of the L-shaped connecting block 104 away from the extrusion plate 103, and the rubber plate 106 is fixed to the bottom of the junction box 6.

[0038] When the long plate 92 moves, the transmission block 101 can move into the mounting frame 2, so that the transmission block 101 squeezes the movable rod 102, and the movable rod 102 rotates at the hinge, so that the movable rod 102 squeezes the extrusion plate 103, so that the extrusion plate 103 can be moved out of the mounting frame 2, and the steel rope between the mounting block 4 and the mounting frame 2 is compressed, so that the steel rope is against the stress sensor 7, so that the steel rope and the stress sensor 7 can be in close contact, making the measurement result more accurate;

[0039] And when the extrusion 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, and press the wire harness connected to the junction box 6, solving the problem of the wire harness loosening from the junction box 6 due to vibration that may be generated during the operation of the beam moving machine.

[0040] When this embodiment works: when the pressing plate 83 approaches the screw rod 3, the pressing plate 83 can drive the connecting plate 91 to move, which will cause the inner side of the connecting plate 91 to squeeze the long plate 92, so that the long plate 92 approaches the mounting bracket 2, thereby causing the squeezing rod 93 to extend into the screw rod 3, causing the squeezing rod 93 to squeeze the bottom inclined surface of the transmission column 94. As the transmission column 94 moves upward under the squeezing force, the return spring 95 is stretched. When the transmission column 94 moves upward, it drives the stopper 96 to move upward. When the stopper When the stopper 96 moves upward and does not contact the protrusion 98, the return spring 97 is in a compressed state, so that the return spring 97 can drive the stopper 96 to move, so that the stopper 96 moves out of the screw rod 3, thereby making the stopper 96 block the nut and prevent the nut from loosening from the screw rod 3. When the stopper 96 moves out of the screw rod 3, the pressure block 910 will not contact the screw rod 3, and the compression spring 911 is in a compressed state, thereby making the compression spring 911 drive the pressure block 910 to move toward the mounting block 4. The movement can make the pressure block 910 press on the nut screwed on the outer wall of the screw rod 3, thereby preventing the steel rope from driving the body 1 to shake, causing the nut to loosen from the screw rod 3 and affecting the detection operation of the stress sensor 7. When the nut is removed from the screw rod 3, the handle 912 can be pulled to move the pressure block 910 toward the stopper 96, compressing the compression spring 911, and then moving the stopper 96 into the transmission column 94 to compress the return spring 97, so that the stopper 96 no longer blocks the nut, and the nut can be screwed until it is not aligned with the ring. When 82 is extruded, the pressing plate 83 is not subjected to the extrusion force and moves away from the screw 3, which will cause the pressing plate 83 to drive the connecting plate 91 to reset, so that the connecting plate 91 pushes the long plate 92 away from the mounting frame 2, so that the extrusion rod 93 does not squeeze the bottom of the transmission column 94, and the reset spring 95 is in a stretched state, so that the reset spring 95 drives the transmission column 94 to move toward the screw 3, driving the stop block 96 to reset, so that the protrusion 98 blocks and limits the stop block 96, and performs the next nut blocking operation.

[0041] When the long plate 92 moves toward the mounting frame 2, it can drive the transmission block 101 to move, so that the transmission block 101 squeezes the movable rod 102, so that the movable rod 102 rotates at the hinge, so that the movable rod 102 squeezes the squeezing plate 103 to move upward, so that the squeezing plate 103 moves out of the mounting frame 2 and squeezes on the steel rope, so that the steel rope can be tightly pressed on the stress sensor 7, and when the squeezing plate 103 moves out of the mounting frame 2, the squeezing plate 103 drives the L-shaped connecting block 104 to move, so that the wire pressing rod 10 5 approaches the rubber plate 106, and the wire harness at the bottom of the junction box 6 is pressed against the rubber plate 106 by the wire pressing rod 105. When the long plate 92 is reset away from the mounting frame 2, the long plate 92 can drive the transmission block 101 to move out of the mounting frame 2, and the movable rod 102 is pulled to rotate the movable rod 102 at the hinge, so that the movable rod 102 drives the extrusion plate 103 to extend into the mounting frame 2. When the extrusion plate is reset, it can drive the L-shaped connecting block 104 and the wire pressing rod 105 away from the rubber plate 106, thereby releasing the pressure on the wire harness.

[0042] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A beam moving machine overload limiter, comprising a machine body (1), characterized in that: A mounting frame (2) is fixed on the left side of the body (1), a screw (3) is fixed on the side wall of the mounting frame (2), a mounting block (4) is provided on the screw (3), a stress sensor (7) is installed inside the mounting block (4), a control panel (5) is fixed on the right side of the body (1), the control panel (5) and the stress sensor (7) are electrically connected, an alarm (11) is fixed on the top of the body (1), the alarm (11) and the control panel (5) are electrically connected, a junction box (6) is fixed on the bottom of the body (1), a positioning device for preventing the mounting block (4) from shaking is provided in the mounting block (4), a protective device for preventing the nut from detaching is provided on the screw (3), and a fixing device for fixing the steel rope is provided in the mounting frame (2); The positioning device comprises 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 mounted on the inner side of 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), and the pressing plate (83) is slidably mounted on the inner wall of the mounting block (4). The circular ring (82) is fixed to the top of the pushing block (81); one side of the transmission spring (85) is fixed to the inner side 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); an L-shaped block (87) is slidably mounted on the inner wall of the mounting block (4); one end of the hinged rod (86) is hinged to the outer wall of the circular ring (82), and the other end of the hinged rod (86) is hinged to the top of the L-shaped block (87); and the centering block (88) is fixed to the end of the L-shaped block (87) away from the hinged rod (86); The protective device includes a connecting plate (91), a long plate (92), an extrusion rod (93), a transmission column (94), a reset spring (95), a stopper (96), a protrusion (98), a return spring (97), a pressure block (910), a connecting rod (99), a handle (912) and a compression spring (911); the connecting plate (91) passes 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 extrusion rod (93) passes through the outer wall of the screw rod (3) and is slidably connected at the penetration point, and the end point of the extrusion rod (93) is fixed to the side wall of the long plate (92); The transmission column (94) is slidably mounted on the inner wall of the screw (3), one side of the return spring (95) is fixed to the inner wall of the screw (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 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 protrusion (98) is fixed to the top of the screw (3), and the side wall of the protrusion (98) fits 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 penetration point, the handle (912) is fixed to the top of the connecting rod (99), the pressure block (910) is fixed to the bottom of the connecting rod (99), one side of the compression spring (911) is fixed to the top of the pressure block (910), and the other side of the compression spring (911) is fixed to the inner side of the stopper (96).

2. The beam moving machine overload limiter according to claim 1, characterized in that: The fixing device comprises a transmission block (101), a movable rod (102), an extrusion plate (103), an L-shaped connection block (104), a wire pressing rod (105) and a rubber plate (106); the transmission block (101) passes through the side wall of the mounting frame (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); the other end of the transmission block (101) is hinged to the movable rod (102); the extrusion plate (103) is slidably mounted on the inner side of the mounting frame (2); and the bottom of the mounting frame (2) is hinged to one end of the movable rod (102) away from the transmission block (101).

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

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