A crane load detection device

Abstract

The present invention discloses a load detection device for a crane, which relates to the technical field of crane mechanisms and comprises a support column, wherein a guide wheel is fixedly mounted on the top of the upper part of the support column, wherein the driving mechanism comprises a speed control mechanism and a steel cable, wherein the speed control mechanism is fixedly mounted on the top of the lower part of the support column, wherein one end of the steel cable close to the driving mechanism is wound around the circumferential surface of the speed control mechanism, and the steel cable contacts the top of the guide wheel, wherein the maintenance device comprises a hollow circular tube, a long rod, a slide plate, a lifting plate, an arc plate, a circular short block and a contact plate, wherein the hollow circular tube is fixedly mounted on the top of the support column, and the long rod is fixedly mounted on the inner wall of the hollow circular tube, and the lifting plate and the steel cable are separated to avoid the situation that the arc plate cannot be stuck under the influence of the reaction force, resulting in huge wear between the steel cable and the arc plate, thereby effectively extending the service life of the steel cable and the arc plate.

Description

Technical Field

[0001] The invention relates to the technical field of lifting mechanisms, in particular to a load detection device for a crane. Background Art

[0002] Crane load detection is the process used to measure the weight of the load on the crane hook. The crane load detection device enables the operator to accurately monitor and control the load on the hook to ensure the safe lifting work.

[0003] The patent with patent announcement number CN115806240B relates to a crane load detection device, which includes a support frame, a guide wheel, a steel cable, a winding shaft and a driving mechanism. The driving mechanism includes a driving motor, a speed transmission mechanism, an acceleration sensing mechanism and a speed control mechanism; the driving motor drives the winding shaft to rotate through the speed transmission mechanism, so that the other end of the steel cable pulls the weight up and down, and the acceleration sensing mechanism is used to detect the acceleration of the lifted weight rising or falling, and controls the speed control mechanism to start when the acceleration of the weight rising or falling exceeds a preset value. When the speed control mechanism is started, the acceleration of the object rising or falling is adjusted by changing the speed of the winding shaft driven by the speed transmission mechanism, thereby adjusting the tension on the steel cable so that the tension on the steel cable does not exceed the preset size, thereby ensuring the safety of the device.

[0004] The above patent has the function of adjusting the acceleration when an object rises or falls. The acceleration is monitored by an acceleration sensing mechanism. When the acceleration exceeds a preset value, the speed control mechanism is started to change the acceleration, thereby adjusting the tension on the steel cable to ensure that the tension on the steel cable does not exceed the preset value. However, the surface of the steel cable will be contaminated with oil, dust or other dirt during operation. These dirt will increase the friction coefficient of the steel cable surface, thereby causing the tension value measured by the sensor to be too high. A scraper is set to contact the circumferential surface of the steel cable for cleaning. When a jam occurs, the scraper will cause great wear on the surface of the steel cable, affecting the service life of the steel cable. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a crane load detection device, 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: a crane load detection device, comprising a support column, a guide wheel is fixedly installed on the top of the support column, the drive mechanism comprises a speed control mechanism and a steel cable, the speed control mechanism is fixedly installed on the top of the support column, one end of the steel cable close to the drive mechanism is wound around the circumferential surface of the speed control mechanism, the steel cable is in contact with the top of the guide wheel, wherein the maintenance device comprises a hollow round tube, a long rod, a slide plate, a lifting plate, The arc plate, the circular short block and the contact plate, the circular short block moves to drive the lifting plate to move in the direction away from the steel cable, and the lifting plate moves to drive the arc plate to move in the direction away from the steel cable, the hollow circular tube is fixedly installed on the top of the supporting column, the long rod is fixedly installed on the inner wall of the hollow circular tube, the slide plate is slidably installed on the circumferential surface of the long rod, the lifting plate slides through the surface of the slide plate close to the steel cable, the arc plate is fixedly installed on one end of the lifting plate close to the steel cable, the movement of the arc plate drives the lifting plate to move in the direction of the driving mechanism, and the movement of the lifting plate drives the slide plate to move in the direction of the driving mechanism, the circular short block is fixedly installed on the surface of the lifting plate, and the contact plate is fixedly installed on the circumferential surface of the long rod, a spring 1 is arranged between the slide plate and the long rod, the slide plate squeezes the spring 1 when moving, the spring 1 is stretched and deformed, the deformed spring 1 applies a reaction force to the slide plate, and the arc plate contacts the circumferential surface of the steel cable.

[0007] According to the above technical solution, a second spring is arranged between the lifting plate and the sliding plate, a first slope is provided on the surface of the arc plate close to the contact plate, and the steel cable is in contact with the first slope of the arc plate, so that the dirt on the surface of the steel cable is separated from the steel cable under the guidance of the arc plate, and a second slope is provided on the surface of the contact plate close to the circular short block, and the circumferential surface of the circular short block is in contact with the second slope of the contact plate during the movement, so that the circular short block moves in the direction away from the steel cable under the guidance of the second slope.

[0008] The handle is moved in a direction away from the placement box, and the movement of the handle drives the rotation plate to move in a direction away from the placement box. The placement box is fixedly installed on one end of the steel cable away from the driving mechanism, and the rotation plate rotates and passes through the surface of the placement box away from the driving mechanism, the handle is fixedly installed on the surface of the rotation plate away from the placement box, an F-shaped groove is provided on the top of the rotation plate, the L-shaped push rod is slidably installed inside the F-shaped groove, the roller is rotationally installed on the inner wall of the rotation plate, the touch block is fixedly installed on the circumferential surface of the roller, the baffle is fixedly installed on the surface of the rotation plate close to the touch block, a circular hole is provided on the surface of the placement box close to the L-shaped push rod, the L-shaped push rod contacts the inner wall of the circular hole, first pushes the L-shaped push rod to rotate upward ninety degrees, and then pushes the L-shaped push rod to move in the direction away from the placement box, and the L-shaped push rod is separated from the surface in contact with the circular hole during the movement, and the touch block itself is elastic.

[0009] According to the above technical solution, the surface of the handle away from the placement box is provided with an arc surface one, and the arc surface one of the handle contacts the lower top of the support column during movement, so that the rotating plate stops moving. A spring three is arranged between the L-shaped push rod and the rotating plate, and the L-shaped push rod squeezes the spring three when moving, and the spring three is deformed due to the squeezing. The surface of the blocking plate close to the roller is provided with an arc surface two, and the touch block contacts the arc surface two of the blocking plate during movement, and the touch block continues to move and is deformed due to the resistance applied by the blocking plate.

[0010] According to the above technical solution, the fixing device includes a carrying rod, an E-shaped plate, a connecting rod, a pressure plate, a Z-shaped plate and a resisting plate, which push the rotating plate to rotate in the direction of the placement box. During the rotation, the rotating plate contacts the surface of the resisting plate away from the placement box, so that the rotation of the rotating plate drives the resisting plate to move in the direction close to the placement box. The carrying rod slides through the inner wall of the placement box, the E-shaped plate is fixedly installed at one end of the carrying rod away from the placement box, a sliding groove is provided on the surface of the E-shaped plate away from the carrying rod, the connecting rod is slidably installed in the inside of the sliding groove, and the pressure plate is rotatably installed at one end of the connecting rod away from the E-shaped plate. The Z-shaped piece is fixedly mounted on the top of the connecting rod, and one end of the Z-shaped piece away from the connecting rod is fixedly mounted inside the slide groove. The support plate is slidably mounted on the inner wall of the placement box close to the E-shaped plate. A spring four is arranged between the carrying rod and the placement box. The carrying rod squeezes the spring four when moving, and the spring four is deformed by the squeezing. The support plate and the rotating plate are in contact with the surface close to the E-shaped plate. The bottom of the support plate is provided with an arc surface three, and the arc surface three is in contact with the circumferential surface of the carrying rod. The arc surface three of the support plate is in contact with the circumferential surface of the carrying rod during the movement, so that the movement of the support plate drives the carrying rod to move downward.

[0011] According to the above technical solution, a corrugation 1 is provided at the bottom of the pressure plate, and the corrugation 1 of the pressure plate contacts the top of the heavy object when moving, so that the E-shaped plate continues to move to squeeze the Z-shaped piece. A spiral spring No. 1 is provided between the pressure plate and the connecting rod. The Z-shaped piece itself has elasticity. The Z-shaped piece is deformed when squeezed, and the deformed Z-shaped piece applies a reaction force to the connecting rod under the action of its own elasticity. A spring 5 is provided between the abutment plate and the placement box.

[0012] According to the above technical scheme, the protection device includes a buffer damper, a platform, a rotating shaft, a loading plate, a rectangular plate and a bending piece. The bottom of the placement box moves downward and contacts the top of the rectangular plate, so that the placement box moves and drives the rectangular plate downward, and the rectangular plate moves and drives the bending piece downward. The buffer damper is fixedly installed on the top below the support column, and the platform is fixedly installed on the free end of the buffer damper. The rotating shaft rotates and passes through the inner and outer walls of the platform. The loading plate is fixedly installed on the circumferential surface of the rotating shaft, and the rectangular plate is fixedly installed on the top of the loading plate. The rectangular plate moves and drives the loading plate downward, and the loading plate moves and drives the rotating shaft downward. The rotating shaft moves and drives the platform downward. The bending piece is fixedly installed on the bottom of the rectangular plate, and the end of the bending piece away from the rectangular plate is fixedly installed on the surface of the platform away from the rotating shaft.

[0013] According to the above technical solution, a No. 2 spiral spring is arranged between the rotating shaft and the platform, and the bending piece itself is elastic. The left side of the rectangular plate rotates downward to squeeze the bending piece on the left side, and the bending piece on the left side is squeezed and deformed. The left side of the rectangular plate rotates downward to stretch the bending piece on the right side, and the bending piece on the right side is stretched and deformed.

[0014] The present invention provides a crane load detection device, which has the following beneficial effects:

[0015] (1) In the load detection device of the crane, spring one applies a reaction force to the slide plate, so that the friction force gradually becomes smaller than the resistance applied by the arc plate. When the arc plate is stuck, spring one is stretched to restore the spring one and drive the arc plate to return to its initial position, thereby avoiding damage to the arc plate caused by the movement of the steel cable when the arc plate is stuck. The movement of the lifting plate drives the arc plate to move away from the steel cable. By separating the lifting plate and the steel cable, the arc plate is prevented from being unable to resolve the jamming situation under the influence of the reaction force, resulting in huge wear between the steel cable and the arc plate, thereby effectively extending the service life of the steel cable and the arc plate.

[0016] (2) In the load detection device of the crane, the L-shaped push rod is separated from the round hole when moving, so that the limit imposed on the turntable by the placement box is released. The limit imposed on the turntable is quickly released through a simple multi-step operation, ensuring that the operator can open the turntable only after standardized operation, effectively improving the standardization of operation without reducing work efficiency. The touch block is deformed due to the resistance imposed by the blocking piece when it moves, so that the speed of rotation of the roller is slowed down under the influence of the resistance. By controlling the rotation speed of the roller, the heavy object can be easily moved out of the placement box through the roller, and at the same time, the heavy object is controlled to slide safely on the turntable.

[0017] (3) In the load detection device of the crane, the connecting rod transmits the reaction force to the pressure plate, so that the pressure plate applies downward pressure to the heavy object. The pressure plate presses the heavy object in the placement box to prevent the heavy object from moving during detection, causing the placement box to shake and affect the detection result. This helps to improve the stability of the detection. When the top of the heavy object is an arc surface, the corrugation contacts the arc surface of the heavy object during movement, causing the pressure plate to rotate during the movement. The pressure plate can automatically adjust its own angle when contacting heavy objects of different shapes, thereby achieving effective limitation of heavy objects of different shapes, thereby improving the applicability of the pressure plate.

[0018] (4) In the load detection device of the crane, the buffer damper exerts a reaction force on the placement box, thereby reducing the tension exerted by the placement box on the steel cable. The buffer damper reduces the tension exerted on the steel cable after the detection, effectively extending the service life of the steel cable while improving the safety during operation. The deformed bending piece exerts a recoil force on the rectangular plate, so that the swing amplitude of the placement box is controlled. The rotatable rectangular plate is used to deal with emergencies, avoiding the placement box from swinging back and forth significantly when the steel cable on one side is broken, causing damage to the equipment and operators in the work scene. 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 schematic diagram of the overall half-section structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the maintenance device of the present invention;

[0022] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0023] Figure 5 It is a schematic diagram of a half-section structure of a placement box of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the storage device and the fixing device of the present invention;

[0025] Figure 7 For the present invention Figure 6 The enlarged structural diagram at B in the middle;

[0026] Figure 8 For the present invention Figure 6 The enlarged structural diagram at C in the middle;

[0027] Fig. 9 It is a schematic diagram of the internal structure of the protection device of the present invention.

[0028] In the figure: 1. support column; 2. guide wheel; 3. driving mechanism; 4. hollow circular tube; 5. long rod; 6. slide plate; 7. lifting plate; 8. arc plate; 9. short round block; 10. contact plate; 101. placement box; 102. rotating plate; 103. handle; 104. L-shaped push rod; 105. roller; 106. touch block; 107. blocking plate; 111. carrying rod; 112. E-shaped plate; 113. connecting rod; 114. pressing plate; 115. Z-shaped plate; 116. abutment plate; 121. buffer damper; 122. platform; 123. rotating shaft; 124. loading plate; 125. rectangular plate; 126. bending plate. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-7 An embodiment of the present invention is: a crane load detection device, comprising a support column 1, a guide wheel 2 is fixedly installed on the top of the support column 1, a driving mechanism 3 comprises a speed control mechanism and a steel cable, the speed control mechanism is fixedly installed on the top of the support column 1, an end of the steel cable close to the driving mechanism 3 is wound around the circumferential surface of the speed control mechanism, and the steel cable is in contact with the top of the guide wheel 2, and also includes a maintenance device and a storage device; wherein the maintenance device comprises a hollow round tube 4, a long rod 5, a slide plate 6, a lifting plate 7, The arc plate 8, the short circular block 9 and the contact plate 10, the hollow circular tube 4 are fixedly mounted on the top of the support column 1, the long rod 5 is fixedly mounted on the inner wall of the hollow circular tube 4, the slide plate 6 is slidably mounted on the circumferential surface of the long rod 5, the lifting plate 7 slides through the surface of the slide plate 6 close to the steel cable, the arc plate 8 is fixedly mounted on one end of the lifting plate 7 close to the steel cable, the short circular block 9 is fixedly mounted on the surface of the lifting plate 7, the contact plate 10 is fixedly mounted on the circumferential surface of the long rod 5, a spring 1 is arranged between the slide plate 6 and the long rod 5, the arc plate 8 contacts the circumferential surface of the steel cable, and when the arc plate 8 and the steel cable are stuck, the arc plate 8 can move with the steel cable to prevent the arc plate 8 from causing serious wear to the moving steel cable.

[0031] A second spring is arranged between the lifting plate 7 and the slide plate 6, a first slope is provided on the surface of the arc plate 8 close to the contact plate 10, and a second slope is provided on the surface of the contact plate 10 close to the circular short block 9. The arc plate 8 is separated from the steel cable under special circumstances to avoid the reaction force applied by the spring 1 when it is deformed and unable to solve the problem of getting stuck, thereby effectively extending the service life of the arc plate 8.

[0032] The storage device includes a storage box 101, a rotating plate 102, a handle 103, an L-shaped push rod 104, a roller 105, a touch block 106 and a blocking piece 107. The storage box 101 is fixedly installed at the end of the steel cable away from the driving mechanism 3, the rotating plate 102 rotates and penetrates the surface of the storage box 101 away from the driving mechanism 3, the handle 103 is fixedly installed on the surface of the rotating plate 102 away from the storage box 101, an F-shaped groove is opened on the top of the rotating plate 102, the L-shaped push rod 104 is slidably installed in the F-shaped groove, and the roller 105 is rotatably installed on the rotating plate 102. The inner wall of the plate 102, the touch block 106 is fixedly installed on the circumferential surface of the roller 105, the blocking piece 107 is fixedly installed on the surface of the rotating plate 102 close to the touch block 106, and a circular hole is opened on the surface of the placement box 101 close to the L-shaped push rod 104. The L-shaped push rod 104 contacts the inner wall of the circular hole. The touch block 106 itself is elastic, and the limit of the rotating plate 102 can be quickly released through simple multiple steps to ensure that the operator can open the rotating plate 102 only after standardized operation, effectively improving the standardization of operations without slowing down work efficiency.

[0033] The handle 103 has an arc surface 1 on the surface away from the placement box 101, a spring 3 is provided between the L-shaped push rod 104 and the rotating plate 102, and the blocking plate 107 has an arc surface 2 on the surface close to the roller 105. The contact between the touch block 106 and the blocking plate 107 can effectively control the rotation speed of the roller 105, so that heavy objects can be easily moved out and safely slide on the rotating plate 102.

[0034] When the present embodiment is working, the driving mechanism 3 is started, so that the speed control mechanism drives the steel cable to move in the direction of the driving mechanism 3. During the movement, friction is generated between the steel cable and the arc plate 8. When the friction is less than the resistance exerted by the arc plate 8, the movement of the steel cable cannot drive the movement of the arc plate 8. At the same time, the inclined surface of the steel cable and the arc plate 8 contacts, so that the dirt on the surface of the steel cable is separated from the steel cable under the guidance of the arc plate 8. When the friction is greater than the resistance exerted by the arc plate 8, the movement of the steel cable drives the arc plate 8 to move in the direction of the driving mechanism 3. The movement of the arc plate 8 drives the lifting plate 7 to move in the direction of the driving mechanism 3. The movement of the lifting plate 7 drives the slide plate 6 to move in the direction of the driving mechanism 3. When the slide plate 6 moves, it squeezes the spring 1, and the spring 1 is stretched and deformed. The deformed spring 1 exerts a reaction force on the slide plate 6. Under the influence of the reaction force The friction force is gradually smaller than the resistance applied by the curved plate 8, so that the spring returns to its original state and drives the sliding plate 6 to reset. By installing the curved plate 8 that can automatically reset after sliding, it is avoided that when the steel cable and the curved plate 8 are stuck, the steel cable movement causes damage to the curved plate 8. The lifting plate 7 moves in the direction of the driving mechanism 3 and drives the circular short block 9 to move. The circumferential surface of the circular short block 9 contacts the inclined surface 2 of the contact plate 10 during the movement, so that the circular short block 9 moves away from the steel cable under the guidance of the inclined surface 2. The movement of the circular short block 9 drives the lifting plate 7 to move in the direction away from the steel cable. The movement of the lifting plate 7 drives the curved plate 8 to move in the direction away from the steel cable. The surface of the curved plate 8 in contact with the steel cable is separated during the movement. The lifting plate 7 moves in the direction away from the steel cable, so that the surface of the curved plate 8 in contact with the steel cable is separated, thereby ensuring the safe use of the curved plate 8.

[0035] When placing a heavy object, first push the L-shaped push rod 104 to rotate upward 90 degrees, then push the L-shaped push rod 104 to move in the direction away from the placement box 101. The L-shaped push rod 104 squeezes the spring three when moving. The surface of the L-shaped push rod 104 in contact with the circular hole is separated during the movement, so that the limit imposed on the rotating plate 102 by the placement box 101 is released. Finally, push the L-shaped push rod 104 to rotate downward 90 degrees, so that the deformed spring three cannot be restored, and the rotating plate 102 is pulled to rotate in the direction away from the placement box 101. Then the heavy object is placed inside the placement box 101 for inspection. The limit imposed on the rotating plate 102 is quickly released through multiple steps, which increases the standardization of operation without slowing down the work efficiency. After the inspection is completed, the limit imposed on the rotating plate 102 is released according to the operation when placing the heavy object, and the handle 103 is moved in the direction away from the placement box 101. The movement of the handle 103 drives the rotating plate 1 02 moves in the direction away from the placement box 101, and at the same time, the arc surface 1 of the handle 103 contacts the lower top of the support column 1 during the movement, so that the rotating plate 102 stops moving, and the weight is moved from the inside of the placement box 101 to the top of the rotating plate 102, and the weight is pushed to move on the rotating plate 102 in the direction away from the placement box 101. The bottom of the weight contacts the circumferential surface of the roller 105 during the movement, so that the movement of the weight drives the roller 105 to rotate, and the rotation of the roller 105 drives the touch block 106 to move. The touch block 106 contacts the arc surface 2 of the blocking piece 107 during the movement. The touch block 106 continues to move and is deformed by the resistance applied by the blocking piece 107, so that the rotation speed of the roller 105 is slowed down under the influence of the resistance, and the contact between the touch block 106 and the blocking piece 107 can effectively control the rotation speed of the roller 105, so that the weight can slide safely on the rotating plate 102.

[0036] See also Figure 1-9On the basis of the above embodiment, another embodiment of the present invention further includes a fixing device and a protecting device; the fixing device includes a carrying rod 111, an E-shaped plate 112, a connecting rod 113, a pressing plate 114, a Z-shaped piece 115 and a stop plate 116, the carrying rod 111 slides through the inner wall of the placement box 101, the E-shaped plate 112 is fixedly installed on the end of the carrying rod 111 away from the placement box 101, a sliding groove is provided on the surface of the E-shaped plate 112 away from the carrying rod 111, the connecting rod 113 is slidably installed in the interior of the sliding groove, the pressing plate 114 is rotatably installed on the end of the connecting rod 113 away from the E-shaped plate 112, and the Z-shaped piece 115 is fixedly installed on the connecting rod 11 3 top, one end of the Z-shaped piece 115 away from the connecting rod 113 is fixedly installed inside the slide slot, and the support plate 116 is slidably installed on the inner wall of the placement box 101 close to the E-shaped plate 112. A spring four is arranged between the carrying rod 111 and the placement box 101. The support plate 116 is in contact with the surface of the rotating plate 102 close to the E-shaped plate 112. The bottom of the support plate 116 is provided with an arc surface three, and the arc surface three is in contact with the circumferential surface of the carrying rod 111. By squeezing the Z-shaped piece 115, the pressure plate 114 applies pressure to the top of the heavy object, ensuring that the heavy object cannot move inside the placement box 101 during work, and preventing the placement box 101 from shaking due to the movement of the heavy object and affecting the detection result.

[0037] A corrugation 1 is provided at the bottom of the pressure plate 114, a spiral spring No. 1 is provided between the pressure plate 114 and the connecting rod 113, the Z-shaped sheet 115 itself is elastic, a spring 5 is provided between the abutment plate 116 and the placement box 101, and the pressure plate 114 is rotatably installed on the connecting rod 113, so that the pressure plate 114 can automatically adjust its angle when it contacts heavy objects of different shapes, thereby improving the applicability of the pressure plate 114.

[0038] The protection device includes a buffer damper 121, a platform 122, a rotating shaft 123, a loading plate 124, a rectangular plate 125 and a bending piece 126. The buffer damper 121 is fixedly installed at the top below the support column 1, the platform 122 is fixedly installed at the free end of the buffer damper 121, the rotating shaft 123 rotates and passes through the inner and outer walls of the platform 122, the loading plate 124 is fixedly installed on the circumferential surface of the rotating shaft 123, the rectangular plate 125 is fixedly installed on the top of the loading plate 124, the bending piece 126 is fixedly installed on the bottom of the rectangular plate 125, and the end of the bending piece 126 away from the rectangular plate 125 is fixedly installed on the surface of the platform 122 away from the rotating shaft 123. The buffer damper 121 reduces the tension on the steel cable after the detection, effectively prolongs the service life of the steel cable, and improves the safety during work.

[0039] A No. 2 spiral spring is arranged between the rotating shaft 123 and the platform 122. The bending piece 126 itself is elastic. When the steel cable connected to one side of the placement box 101 is broken, the rotatable rectangular plate 125 controls the shaking amplitude of the placement box 101 under the influence of gravity, thereby effectively preventing the placement box 101 from shaking too much and causing damage to the work scene or injuring the operator.

[0040] When the present embodiment is working, after placing a heavy object in the placement box 101, the rotating plate 102 is pushed to rotate in the direction of the placement box 101. During the rotation process, the rotating plate 102 contacts the surface of the abutment plate 116 away from the placement box 101, so that the rotation of the rotating plate 102 drives the abutment plate 116 to move in the direction close to the placement box 101, and the abutment plate 116 stretches the spring five when moving, and at the same time, the arc surface three of the abutment plate 116 contacts the circumferential surface of the carrying rod 111 during the movement, so that the abutment plate 116 moves and drives the carrying rod 111 to move downward, and the carrying rod 111 squeezes the spring four when moving, and at the same time, the carrying rod 111 moves and drives the E-shaped plate 112 to move downward, and the E-shaped plate 112 moves and drives the Z-shaped sheet 115 to move downward, and at the same time, the E-shaped plate 112 moves and drives the connecting rod 113 to move downward, and the connecting rod 113 moves and drives the pressing plate 114 to move downward, and the corrugation one of the pressing plate 114 contacts the top of the heavy object when moving, so that the E-shaped plate 112 continues to move and squeeze the Z-shaped sheet 115, the Z-shaped piece 115 is squeezed and deformed. The deformed Z-shaped piece 115 exerts a reaction force on the connecting rod 113 under the action of its own elasticity. The connecting rod 113 transmits the reaction force to the pressure plate 114, so that the pressure plate 114 exerts downward pressure on the weight, and applies pressure to the top of the weight through the pressure plate 114, effectively restricting the movement of the weight to prevent the weight from shaking and affecting the detection result. When the top of the weight is an arc surface, the corrugation 1 contacts the arc surface of the weight when moving, so that the pressure plate 114 rotates during the movement. The pressure plate 114 stretches the No. 1 spiral spring when rotating, and the pressure plate 114 continues to move to exert downward pressure on the top of the weight. When the corrugation 1 fits the arc surface, the weight in the placement box 101 is limited in movement. The pressure plate 114 is rotatably installed on the connecting rod 113, so that the pressure plate 114 can automatically adjust the angle when contacting weights of different shapes, thereby realizing effective limitation of the weight.

[0041] The bottom of the placement box 101 moves downward and contacts the top of the rectangular plate 125, so that the placement box 101 moves and drives the rectangular plate 125 to move downward, and the rectangular plate 125 moves and drives the bending piece 126 to move downward. At the same time, the rectangular plate 125 moves and drives the loading plate 124 to move downward, and the loading plate 124 moves and drives the rotating shaft 123 to move downward, and the rotating shaft 123 moves and drives the platform 122 to move downward, and the platform 122 moves and drives the free end of the buffer damper 121 to move downward, so that the buffer damper 121 applies a reaction force to the bottom of the placement box 101, and the tension applied by the placement box 101 to the steel cable is reduced under the influence of the reaction force. The buffer damper 121 reduces the tension on the steel cable after the detection is completed, thereby extending the service life of the steel cable and improving the safety during work. When the steel cable connected to the left side of the placement box 101 breaks, the left side of the placement box 101 rotates downward under the influence of gravity. The left side of the placement box 101 contacts the left side of the rectangular plate 125 during the rotation process, so that the placement box 101 rotates and drives the left side of the rectangular plate 125 to rotate downward, the rectangular plate 125 rotates and drives the loading plate 124 to rotate to the left, the loading plate 124 rotates and drives the rotating shaft 123 to rotate to the left, and the rotating shaft 123 stretches the No. 2 spiral spring when rotating, and at the same time, the rectangular plate 125 rotates and squeezes the curved piece 126 on the left, and the curved piece 126 on the left is squeezed and deformed, and the rectangular plate 125 rotates and stretches the curved piece 126 on the right, and the curved piece 126 on the right is stretched and deformed, and the deformed curved piece 126 applies a recoil force to the rectangular plate 125, so that the shaking amplitude of the placement box 101 is controlled, and the shaking amplitude of the placement box 101 when an emergency occurs is controlled by the rotatable rectangular plate 125 to prevent the placement box 101 from shaking significantly and causing damage to the work scene or injuring the operator.

[0042] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crane load detection device, comprising a support column (1), characterized in that: A guide wheel (2) is fixedly mounted on the top of the support column (1); the drive mechanism (3) comprises a speed control mechanism and a steel cable; the speed control mechanism is fixedly mounted on the top of the support column (1); one end of the steel cable close to the drive mechanism (3) is wound around the circumferential surface of the speed control mechanism; the steel cable is in contact with the top of the guide wheel (2); and the drive mechanism further comprises a maintenance device, a storage device, a fixing device and a protection device; The maintenance device comprises a hollow circular tube (4), a long rod (5), a slide plate (6), a lifting plate (7), a curved plate (8), a circular short block (9) and a contact plate (10), wherein the hollow circular tube (4) is fixedly mounted on the top of the support column (1), the long rod (5) is fixedly mounted on the inner wall of the hollow circular tube (4), the slide plate (6) is slidably mounted on the circumferential surface of the long rod (5), the lifting plate (7) slides through the surface of the slide plate (6) close to the steel cable, the curved plate (8) is fixedly mounted on one end of the lifting plate (7) close to the steel cable, the circular short block (9) is fixedly mounted on the surface of the lifting plate (7), the contact plate (10) is fixedly mounted on the circumferential surface of the long rod (5), a spring 1 is arranged between the slide plate (6) and the long rod (5), and the curved plate (8) is in contact with the circumferential surface of the steel cable; The storage device comprises a storage box (101), a rotating plate (102), a handle (103), an L-shaped push rod (104), a roller (105), a touch block (106) and a blocking plate (107); the storage box (101) is fixedly mounted on an end of the steel cable away from the driving mechanism (3); the rotating plate (102) rotates and penetrates the surface of the storage box (101) away from the driving mechanism (3); the handle (103) is fixedly mounted on the surface of the rotating plate (102) away from the storage box (101); and the top of the rotating plate (102) is provided with a An F-shaped groove is provided, the L-shaped push rod (104) is slidably mounted inside the F-shaped groove, the roller (105) is rotatably mounted on the inner wall of the rotating plate (102), the touch block (106) is fixedly mounted on the circumferential surface of the roller (105), the blocking sheet (107) is fixedly mounted on the surface of the rotating plate (102) close to the touch block (106), a circular hole is opened on the surface of the placement box (101) close to the L-shaped push rod (104), the L-shaped push rod (104) is in contact with the inner wall of the circular hole, and the touch block (106) itself has elasticity; The fixing device comprises a carrying rod (111), an E-shaped plate (112), a connecting rod (113), a pressing plate (114), a Z-shaped sheet (115) and a stop plate (116); the carrying rod (111) is slidably inserted into the inner wall of the placement box (101); the E-shaped plate (112) is fixedly mounted on an end of the carrying rod (111) away from the placement box (101); a sliding groove is provided on a surface of the E-shaped plate (112) away from the carrying rod (111); the connecting rod (113) is slidably mounted inside the sliding groove; the pressing plate (114) is rotatably mounted on an end of the connecting rod (113) away from the E-shaped plate (1 12), the Z-shaped sheet (115) is fixedly mounted on the top of the connecting rod (113), the end of the Z-shaped sheet (115) away from the connecting rod (113) is fixedly mounted inside the slide groove, the abutment plate (116) is slidably mounted on the inner wall of the placement box (101) close to the E-shaped plate (112), a spring four is arranged between the carrying rod (111) and the placement box (101), the abutment plate (116) is in contact with the surface of the rotating plate (102) close to the E-shaped plate (112), and the bottom of the abutment plate (116) is provided with an arc surface three, and the arc surface three is in contact with the circumferential surface of the carrying rod (111); The protection device comprises a buffer damper (121), a platform (122), a rotating shaft (123), a loading plate (124), a rectangular plate (125) and a bending piece (126); the buffer damper (121) is fixedly mounted on the top below the support column (1); the platform (122) is fixedly mounted on the free end of the buffer damper (121); the rotating shaft (123) rotates and penetrates the inner and outer walls of the platform (122); the loading plate (124) is fixedly mounted on the circumferential surface of the rotating shaft (123); the rectangular plate (125) is fixedly mounted on the top of the loading plate (124); the bending piece (126) is fixedly mounted on the bottom of the rectangular plate (125); and one end of the bending piece (126) away from the rectangular plate (125) is fixedly mounted on the surface of the platform (122) away from the rotating shaft (123).

2. A crane load detection device according to claim 1, characterized in that: A second spring is provided between the lifting plate (7) and the sliding plate (6); a first inclined surface is provided on the surface of the arc-shaped plate (8) close to the contact plate (10); and a second inclined surface is provided on the surface of the contact plate (10) close to the circular short block (9).

3. A crane load detection device according to claim 1, characterized in that: The handle (103) has a first arc surface on its surface away from the placement box (101), a third spring is provided between the L-shaped push rod (104) and the rotating plate (102), and the blocking plate (107) has a second arc surface on its surface close to the roller (105).

4. A crane load detection device according to claim 1, characterized in that: The bottom of the pressure plate (114) is provided with corrugation one, a spiral spring No. 1 is provided between the pressure plate (114) and the connecting rod (113), the Z-shaped sheet (115) itself has elasticity, and a spring five is provided between the abutment plate (116) and the placement box (101).

5. A crane load detection device according to claim 1, characterized in that: A second scroll spring is provided between the rotating shaft (123) and the platform (122), and the bending piece (126) itself has elasticity.

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