A special lifting equipment with adjustable center of mass

Abstract

The present invention discloses a special lifting equipment with adjustable center of mass, which relates to the technical field of special lifting. The present invention comprises a base plate, a base shell is fixed on the bottom surface of the base plate, a slide groove is opened in the middle of the top surface of the base plate, and balance sensors are fixed on both sides of the top surface of the base plate, a U-shaped long frame is fixed on the bottom end of the interior of the base shell, a screw is penetrated through the inner wall of the U-shaped long frame and rotatably installed, a servo motor is fixed on the bottom end of the interior of the base shell, and the servo motor is located on the left side of the U-shaped long frame, and the right side of the rotating shaft of the servo motor is fixedly connected to the left end of the screw, and a slider is slidably installed on the outer wall of the screw, and the inner wall of the slider is engaged with the inner wall of the spiral groove of the screw, and the outer wall of the slider is in sliding contact with the inner wall of the base plate. The present invention clamps the material box by a rubber plate for reciprocating left and right movement, so that the center of gravity of the material box is kept balanced on the base plate, thereby avoiding shaking and damage of the material in the material box caused by unstable center of gravity of the material box on the base plate.

Description

Technical Field

[0001] The invention relates to the technical field of special hoisting, in particular to a special hoisting device with adjustable center of mass. Background Art

[0002] The main purpose of special lifting equipment is to lift material boxes for transportation and loading. Its function of automatically adjusting the center of mass position ensures the stability and safety of the material box lifting process, greatly improving the efficiency of material box loading.

[0003] The patent with announcement number CN113651234B discloses a special lifting equipment with adjustable center of mass, which includes a lifting beam assembly, a lifting ring assembly and a center of mass adjustment assembly. The equipment has two lifting ring assemblies, and the motor reduction device drives the movable screw to rotate. The lateral movement of the movable nut is realized according to the transmission of the screw and the nut, thereby realizing the automatic adjustment of the distance between the lifting ring assemblies. Three missile clamps are installed on the lifting ring, and the angle between each clamp is 60° to ensure the stability of the loaded missiles. Different types of missile clamps can be replaced to adapt to the diameters of different types of missiles, thereby realizing the versatility of the lifting equipment. The hydraulic system can be adjusted to adjust the lifting point position by pushing the lifting sleeve to move, thereby realizing automatic adjustment of the center of mass position and ensuring the stability of the lifting. This invention can be applied to various types of missile lifting work, is easy to operate, and has high efficiency.

[0004] However, the current special lifting equipment with adjustable center of mass has the following problems: when the special lifting equipment with adjustable center of mass is in use, the material box is prone to shaking in the equipment when the special lifting equipment is carrying the material box, which in turn causes the center of gravity of the material box to be unstable on the bottom plate, causing the material in the material box to shake and be damaged. Therefore, we propose a special lifting equipment with adjustable center of mass. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a special hoisting device with adjustable center of mass, 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 special lifting equipment with adjustable center of mass, comprising a base plate, a base shell fixed to the bottom surface of the base plate, a slide groove opened in the middle of the top surface of the base plate, balance sensors fixed on both sides of the top surface of the base plate, a U-shaped long frame fixed to the bottom end of the bottom shell, a screw rod passing through and rotatably installed on the inner wall of the U-shaped long frame, a servo motor fixed to the bottom end of the bottom shell, the servo motor is located on the left side of the U-shaped long frame, the right side of the rotating shaft of the servo motor is fixedly connected to the left end of the screw rod, a slider is slidably installed on the outer wall of the screw rod, the inner wall of the slider rod is meshed with the inner wall of the spiral groove of the screw rod, the outer wall of the slider rod is in sliding contact with the inner wall of the base plate, and the slider rod The top surface is fixed with a U-shaped frame, and the bottom surface of the U-shaped frame is in sliding contact with the top surface of the bottom plate. The left and right sides of the U-shaped frame are penetrated and slidably installed with U-shaped rods, and the left and right sides of the U-shaped frame are penetrated and fixedly installed with electric telescopic rods, and the telescopic ends of the two electric telescopic rods are fixedly connected to the outer walls of the two U-shaped rods, and a rubber plate is fixed on the side where the two U-shaped rods are close to each other. The slider reciprocates left and right in the spiral groove of the screw, and the slider slides back and forth left and right in the slide groove of the bottom plate. The slider drives the U-shaped frame to reciprocate left and right, the U-shaped frame drives the U-shaped rod to reciprocate left and right, and the U-shaped rod drives the rubber plate to reciprocate left and right, so that the rubber plate clamps the material box to reciprocate left and right.

[0007] According to the above technical solution, vertical rings are fixed on the four sides of the top surface of the base plate, and a steel cable is fixedly installed on the inner wall of each of the four vertical rings. A cross bar is fixed on one end of the four steel cables away from the four vertical rings, and a hook is provided in the middle of the top surface of the cross bar.

[0008] According to the above technical solution, an anti-slip groove is provided on the side where the two rubber plates are close to each other, the two rubber plates are located on both sides of the inner wall of the U-shaped frame, and the two electric telescopic rods are respectively located in the middle of the side where the two rubber plates are away from each other.

[0009] According to the above technical solution, anti-slip devices are provided at the bottom of the left and right sides of the U-shaped frame, and the anti-slip devices are used to prevent the material box from slipping during transportation. The bottom surface of the anti-slip device is provided with an anti-obstruction device, and the anti-obstruction device is used to scrape off dirt on the top surface of the bottom plate.

[0010] According to the above technical solution, ring supports are fixed to the bottom of the left and right sides of the U-shaped frame, and a reciprocating rod is fixed to the inner walls of the two ring supports. The reciprocating rod is located below the two U-shaped rods, and four inclined plates are fixed to the outer walls of the reciprocating rod. The four inclined plates are arranged in groups of two at the front and rear of the U-shaped frame. Two strip plates are fixed opposite the four inclined plates, and a rubber strip is fixed in the middle of the two strip plates opposite each other. The strip plates drive the rubber strips to move back and forth left and right, allowing the rubber plates to clamp the material box and move back and forth left and right. The rubber strips on the strip plates prevent the material box from slipping.

[0011] According to the above technical solution, a semi-annular plate is fixed on each side of the two ring supports away from each other, a T-shaped plate is fixed on the bottom of each side of the two semi-annular plates away from each other, and an arc-shaped spring piece is fixed on each side of the two T-shaped plates away from each other. L-shaped plates are fixed on both sides of the top surface of the bottom plate, and the two L-shaped plates are located on the side where the two balance sensors are close to each other. The two L-shaped plates are respectively on the outer wall movement trajectory of the two arc-shaped spring pieces. When the arc-shaped spring piece moves back and forth left and right, the arc-shaped spring piece contacts the L-shaped plate. Under the elastic force of the arc-shaped spring piece, the return rod will not hit the balance sensor.

[0012] According to the above technical solution, a connecting plate is fixed to the bottom surface of each of the two semi-ring plates, a long rod is fixed to the bottom surface of each of the two connecting plates, the outer wall of one of the long rods has four vertical ring blocks, and a chamfered plate is fixed to the bottom surface of each of the two vertical ring blocks. The four chamfered plates are respectively located at the bottom of both sides of the U-shaped frame in groups of two, and the bottom surfaces of the four chamfered plates are in sliding contact with the top surface of the bottom plate. During the reciprocating movement of the chamfered plates left and right, the chamfered plates scrape off the dirt on the bottom plate.

[0013] According to the above technical solution, a horizontal bar is fixed to the top surface of the two chamfered plates, a groove plate is fixed to the bottom surface of one of the horizontal bars, a sponge block is fixed to the top of the inner walls of the two groove plates respectively, and the outer walls of the two sponge blocks are in sliding contact with the inner walls of the slide groove of the bottom plate. During the reciprocating movement of the sponge blocks to the left and right, the sponge blocks will wipe foreign objects in the slide groove of the bottom plate.

[0014] The present invention provides a special hoisting device with adjustable center of mass. It has the following beneficial effects:

[0015] (1) The present invention comprises a base plate, a balance sensor, a bottom shell, a U-shaped long frame, a screw, a servo motor, a slider, a U-shaped frame, a U-shaped rod and an electric telescopic rod in combination with a rubber plate. The rubber plate clamps the material box, and the balance sensor senses whether the base plate is in a balanced state. The slider moves back and forth in the spiral groove of the screw, and the slider slides back and forth in the slide groove of the base plate. The slider drives the U-shaped frame to move back and forth, the U-shaped frame drives the U-shaped rod to move back and forth, and the U-shaped rod drives the rubber plate to move back and forth, so that the rubber plate clamps the material box to move back and forth, so that the center of gravity of the material box is kept balanced on the base plate, and the material in the material box is prevented from shaking and being damaged due to the unstable center of gravity of the material box on the base plate.

[0016] (2) The present invention sets an anti-skid device so that the ring support, the return rod, the inclined plate and the strip plate cooperate with the rubber strip. The return rod drives the inclined plate to move back and forth left and right, the inclined plate drives the strip plate to move back and forth left and right, and the strip plate drives the rubber strip to move back and forth left and right, so that the rubber plate clamps the material box and moves back and forth left and right. The rubber strip on the strip plate blocks the material box from sliding, preventing the material box from sliding in the U-shaped frame and causing poor lifting effect of the material box.

[0017] (3) The present invention sets an anti-skid device so that the semi-annular plate, the T-shaped plate and the arc-shaped spring piece cooperate with the L-shaped plate. When the arc-shaped spring piece moves back and forth, the arc-shaped spring piece and the L-shaped plate come into contact. Under the elastic force of the arc-shaped spring piece, the return rod will not hit the balance sensor, thereby preventing the balance sensor from being easily damaged by the return rod.

[0018] (4) The present invention sets up an anti-blocking device so that the connecting plate, the long rod and the vertical ring block cooperate with the chamfered plate. The vertical ring block drives the chamfered plate to move back and forth. During the reciprocating movement of the chamfered plate, the chamfered plate scrapes off the dirt on the bottom plate, preventing a large amount of dirt from accumulating on the bottom plate and causing the U-shaped frame to move unsmoothly.

[0019] (5) The present invention sets an anti-blocking device so that the horizontal bar and the groove plate cooperate with the sponge block, and the groove plate drives the sponge block to move back and forth left and right. During the reciprocating movement of the sponge block, the sponge block will wipe the foreign matter in the bottom plate chute, preventing a large amount of foreign matter in the bottom plate chute from causing the U-shaped frame to adjust the center of gravity to get stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the present invention as a whole;

[0021] Figure 2 Schematic diagram of the internal structure of the present invention;

[0022] Figure 3 It is a cross-sectional schematic diagram of the bottom shell of the present invention;

[0023] Figure 4 is a schematic diagram of the anti-slip device of the present invention;

[0024] Figure 5 For the present invention Figure 4 A partial enlarged schematic diagram of point A in the middle;

[0025] Figure 6 is a schematic diagram of the anti-blocking device of the present invention;

[0026] Figure 7 For the present invention Figure 6 A partial enlarged schematic diagram of point B in the middle.

[0027] In the figure: 1. bottom plate; 2. balance sensor; 3. bottom shell; 4. U-shaped long frame; 5. screw; 6. servo motor; 7. slider; 8. U-shaped frame; 9. U-shaped rod; 10. electric telescopic rod; 11. rubber plate; 12. anti-slip device; 121. ring support; 122. circular rod; 123. inclined plate; 124. strip plate; 125. rubber strip; 126. semi-ring plate; 127. T-shaped plate; 128. arc-shaped spring piece; 129. L-shaped plate; 13. anti-obstruction device; 131. connecting plate; 132. long rod; 133. ring vertical block; 134. chamfered plate; 135. horizontal bar; 136. groove plate; 137. sponge block; 14. vertical ring; 15. steel cable; 16. horizontal rod. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] See also Figure 1-Figure 7One embodiment of the present invention is: a special hoisting device with adjustable center of mass, including a base plate 1, a bottom shell 3 is fixed to the bottom surface of the base plate 1, a slide groove is opened in the middle of the top surface of the base plate 1, and balance sensors 2 are fixed on both sides of the top surface of the base plate 1, a U-shaped long frame 4 is fixed to the bottom end of the bottom shell 3, a screw 5 is installed through the inner wall of the U-shaped long frame 4 and rotatably, a servo motor 6 is fixed to the bottom end of the bottom shell 3, the servo motor 6 is located on the left side of the U-shaped long frame 4, the right side of the rotating shaft of the servo motor 6 is fixedly connected to the left end of the screw 5, a slider 7 is slidably installed on the outer wall of the screw 5, and the inner wall of the slider 7 is engaged with the inner wall of the spiral groove of the screw 5 The outer wall of the slider 7 is in sliding contact with the inner wall of the bottom plate 1. The top surface of the slider 7 is fixed with a U-shaped frame 8. The bottom surface of the U-shaped frame 8 is in sliding contact with the top surface of the bottom plate 1. The left and right sides of the U-shaped frame 8 are penetrated and slidably installed with U-shaped rods 9. The left and right sides of the U-shaped frame 8 are penetrated and fixedly installed with electric telescopic rods 10. The telescopic ends of the two electric telescopic rods 10 are fixedly connected to the outer walls of the two U-shaped rods 9. A rubber plate 11 is fixed on each side of the two U-shaped rods 9 close to each other. Vertical rings 14 are fixed on all four sides of the top surface of the bottom plate 1. A steel cable 15 is fixed on the inner wall of each of the four vertical rings 14. The four steel cables 15 A cross bar 16 is fixed to one end away from the four vertical rings 14, and a hook is provided in the middle of the top surface of the cross bar 16. An anti-slip groove is provided on the side where the two rubber plates 11 are close to each other. The two rubber plates 11 are located on both sides of the inner wall of the U-shaped frame 8. The two electric telescopic rods 10 are respectively located in the middle of the side where the two rubber plates 11 are away from each other. Anti-slip devices 12 are provided on the bottom of the left and right sides of the U-shaped frame 8. The anti-slip devices 12 are used to prevent the material box from slipping during transportation. The bottom surface of the anti-slip device 12 is provided with an anti-blocking device 13. The anti-blocking device 13 is used to scrape off the dirt on the top surface of the bottom plate 1. The rubber plate 11 clamps the material box The balance sensor 2 will sense whether the base plate 1 is in a balanced state, the slider 7 moves back and forth in the spiral groove of the screw 5, the slider 7 slides back and forth in the slide groove of the base plate 1, the slider 7 drives the U-shaped frame 8 to move back and forth, the U-shaped frame 8 drives the U-shaped rod 9 to move back and forth, the U-shaped rod 9 drives the rubber plate 11 to move back and forth, so that the rubber plate 11 clamps the material box to move back and forth, so that the center of gravity of the material box on the base plate 1 is balanced, so as to avoid the material in the material box from shaking and being damaged due to the unstable center of gravity of the material box on the base plate 1 when the special lifting equipment is lifting the material box.

[0030] The U-shaped frame 8 is in a state of equilibrium when the lifting device is used, and the bottom plate 1 is pulled up by the operator, and the bottom plate 1 is pulled up by the operator. When offset, the balancing sensor 2 starts the servo motor 6, and the rotating shaft of the servo motor 6 starts to rotate forward and backward. The rotating shaft of the servo motor 6 drives the screw 5 to rotate forward and backward. The screw 5 rotates forward and backward in the U-shaped long frame 4. The slider 7 is restricted by the slide groove of the bottom plate 1. The slider 7 moves back and forth in the spiral groove of the screw 5. The slider 7 slides back and forth in the slide groove of the bottom plate 1. The slider 7 drives the U-shaped frame 8 to move back and forth. The U-shaped frame 8 drives the U-shaped rod 9 to move back and forth. The U-shaped rod 9 drives the rubber plate 11 to move back and forth, so that the rubber plate 11 clamps the material box to move back and forth, so that the center of gravity of the material box is balanced on the bottom plate 1, preventing the material box from being unstable on the bottom plate 1 when the equipment is in use, thereby avoiding the material in the material box from shaking and being damaged due to the unstable center of gravity of the material box on the bottom plate 1 when the special lifting equipment is lifting the material box.

[0031] See also Figure 1-Figure 7 On the basis of the above embodiment, in another embodiment of the present invention, ring brackets 121 are fixed to the bottom of the left and right sides of the U-shaped frame 8, and the inner walls of the two ring brackets 121 are fixed with a retractable rod 122. The retractable rod 122 is located below the two U-shaped rods 9. Four inclined plates 123 are fixed to the outer wall of the retractable rod 122. The four inclined plates 123 are arranged in pairs at the front and rear of the U-shaped frame 8. Two strip plates 124 are fixed opposite the four inclined plates 123. A rubber strip 125 is fixed in the middle of the opposite sides, and the return rod 122 drives the inclined plate 123 to move back and forth left and right, the inclined plate 123 drives the strip plate 124 to move back and forth left and right, and the strip plate 124 drives the rubber strip 125 to move back and forth left and right, so that the rubber plate 11 clamps the material box and moves back and forth left and right. The rubber strip 125 on the strip plate 124 prevents the material box from slipping, thereby preventing the material box from slipping in the U-shaped frame 8 when the special lifting equipment is lifting the material box, resulting in poor lifting effect of the material box.

[0032] A semi-annular plate 126 is fixed on the side of the two ring supports 121 away from each other, and a T-shaped plate 127 is fixed on the bottom of the side of the two semi-annular plates 126 away from each other. An arc-shaped spring piece 128 is fixed on the side of the two T-shaped plates 127 away from each other. L-shaped plates 129 are fixed on both sides of the top surface of the bottom plate 1. The two L-shaped plates 129 are located on the side where the two balance sensors 2 are close to each other. The two L-shaped plates 129 are respectively on the outer wall movement trajectory of the two arc-shaped spring pieces 128. When the arc-shaped spring piece 128 moves back and forth left and right, the arc-shaped spring piece 128 and the L-shaped plate 129 are in contact. Under the elastic force of the arc-shaped spring piece 128, the return rod 122 will not hit the balance sensor 2, thereby preventing the balance sensor 2 from being easily damaged by the return rod 122 when the special lifting equipment is lifting the material box.

[0033] A connecting plate 131 is fixed to the bottom surface of each of the two semi-ring plates 126, and a long rod 132 is fixed to the bottom surface of each of the two connecting plates 131. The outer wall of a long rod 132 has four ring vertical blocks 133, and the bottom surfaces of the two ring vertical blocks 133 are fixed with a chamfered plate 134. The four chamfered plates 134 are respectively located at the bottom of both sides of the U-shaped frame 8 in groups of two. The bottom surfaces of the four chamfered plates 134 are in sliding contact with the top surface of the bottom plate 1, and the ring vertical blocks 133 drive the chamfered plates 134 to move back and forth left and right. In the process of the chamfered plates 134 moving back and forth left and right, the chamfered plates 134 scrape off the dirt on the bottom plate 1, so as to avoid a large amount of dirt accumulating on the bottom plate 1 when the special lifting equipment is lifting the material box, causing the U-shaped frame 8 to move unsmoothly.

[0034] A horizontal bar 135 is fixed to the top surface of the two chamfered plates 134, and a groove plate 136 is fixed to the bottom surface of a horizontal bar 135. A sponge block 137 is fixed to the top of the inner wall of the two groove plates 136. The outer walls of the two sponge blocks 137 are in sliding contact with the inner wall of the slide groove of the bottom plate 1. The groove plate 136 drives the sponge block 137 to move back and forth left and right. During the reciprocating movement of the sponge block 137, the sponge block 137 will wipe the foreign matter in the slide groove of the bottom plate 1, so as to avoid a large amount of foreign matter in the slide groove of the bottom plate 1 when the special lifting equipment is lifting the material box, causing the U-shaped frame 8 to adjust the center of gravity to get stuck.

[0035] While the slider 7 drives the U-shaped frame 8 to move back and forth left and right, the U-shaped frame 8 drives the ring support 121 to move back and forth left and right, the ring support 121 drives the return rod 122 to move back and forth left and right, the return rod 122 drives the inclined plate 123 to move back and forth left and right, the inclined plate 123 drives the strip plate 124 to move back and forth left and right, the strip plate 124 drives the rubber strip 125 to move back and forth left and right, so that the rubber plate 11 clamps the material box to move back and forth left and right, and the rubber strip 125 on the strip plate 124 blocks the material box from slipping, preventing the material box from slipping in the U-shaped frame 8 when the equipment is in use, thereby avoiding the problem of poor material box lifting effect caused by the material box slipping in the U-shaped frame 8 when the special lifting equipment is lifting the material box.

[0036] While the U-shaped frame 8 drives the ring support 121 to move back and forth left and right, the ring support 121 drives the semi-annular plate 126 to move back and forth left and right, the semi-annular plate 126 drives the T-shaped plate 127 to move back and forth left and right, and the T-shaped plate 127 drives the arc-shaped spring piece 128 to move back and forth left and right. During the reciprocating movement of the arc-shaped spring piece 128, the arc-shaped spring piece 128 contacts the L-shaped plate 129. Under the elastic force of the arc-shaped spring piece 128, the return rod 122 will not hit the balance sensor 2, preventing the balance sensor 2 from being hit by the return rod 122 when the equipment is in use, thereby avoiding the problem of the balance sensor 2 being easily damaged due to the return rod 122 when the special lifting equipment is lifting the material box.

[0037] While the ring support 121 drives the semi-ring plate 126 to move back and forth left and right, the semi-ring plate 126 drives the connecting plate 131 to move back and forth left and right, the connecting plate 131 drives the long rod 132 to move back and forth left and right, the long rod 132 drives the ring vertical block 133 to move back and forth left and right, and the ring vertical block 133 drives the chamfered plate 134 to move back and forth left and right. In the process of the chamfered plate 134 moving back and forth left and right, the chamfered plate 134 scrapes off the dirt on the bottom plate 1 to prevent a large amount of dirt from accumulating on the bottom plate 1 when the equipment is in use, thereby avoiding the problem of a large amount of dirt accumulating on the bottom plate 1 when the special lifting equipment is lifting the material box, causing the U-shaped frame 8 to move unsmoothly.

[0038] While the vertical ring block 133 drives the chamfered plate 134 to move back and forth left and right, the chamfered plate 134 drives the horizontal bar 135 to move back and forth left and right, the horizontal bar 135 drives the groove plate 136 to move back and forth left and right, and the groove plate 136 drives the sponge block 137 to move back and forth left and right. During the reciprocating movement of the sponge block 137, the sponge block 137 will wipe the foreign matter in the chute of the bottom plate 1 to prevent a large amount of foreign matter from being in the chute of the bottom plate 1 when the equipment is in use, thereby avoiding the problem of a large amount of foreign matter in the chute of the bottom plate 1 causing the U-shaped frame 8 to be stuck in adjusting the center of gravity when the special lifting equipment is lifting the material box.

[0039] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A mass-center adjustable special hoisting device, comprising a base plate (1), a bottom shell (3) being fixed to the bottom surface of the base plate (1), characterized in that: A sliding groove is provided in the middle of the top surface of the bottom plate (1), and balance sensors (2) are fixed on both sides of the top surface of the bottom plate (1). A U-shaped long frame (4) is fixed to the bottom end of the inner side of the bottom shell (3), and a screw (5) is rotatably installed through the inner wall of the U-shaped long frame (4). A servo motor (6) is fixed to the bottom end of the inner side of the bottom shell (3), and the servo motor (6) is located on the left side of the U-shaped long frame (4). The right side of the rotating shaft of the servo motor (6) is fixedly connected to the left end of the screw (5). A slider (7) is slidably installed on the outer wall of the screw (5), and the inner wall of the slider (7) is in contact with the spiral groove of the screw (5). The walls are meshed with each other, the outer wall of the slider (7) is in sliding contact with the inner wall of the bottom plate (1), a U-shaped frame (8) is fixed to the top surface of the slider (7), the bottom surface of the U-shaped frame (8) is in sliding contact with the top surface of the bottom plate (1), the left and right sides of the U-shaped frame (8) are penetrated and slidably mounted with U-shaped rods (9), the left and right sides of the U-shaped frame (8) are penetrated and fixedly mounted with electric telescopic rods (10), the telescopic ends of the two electric telescopic rods (10) are fixedly connected to the outer walls of the two U-shaped rods (9), and a rubber plate (11) is respectively fixed to the side of the two U-shaped rods (9) close to each other; The left and right bottoms of the U-shaped frame (8) are provided with anti-skid devices (12), which are used to prevent the material box from sliding during transportation. The bottom surface of the anti-skid device (12) is provided with an anti-blocking device (13), which is used to scrape dirt off the top surface of the bottom plate (1); The left and right bottoms of the U-shaped frame (8) are both fixed with ring supports (121), the inner walls of the two ring supports (121) are fixed with reciprocating rods (122), the reciprocating rods (122) are located below the two U-shaped rods (9), the outer walls of the reciprocating rods (122) are fixed with four inclined plates (123), the four inclined plates (123) are arranged in groups of two at the front and rear of the U-shaped frame (8), two strip plates (124) are fixed directly opposite the four inclined plates (123), and a rubber strip (125) is fixed in the middle of the two strip plates (124) directly opposite each other; A semi-annular plate (126) is fixed to each side of the two ring supports (121) away from each other, a T-shaped plate (127) is fixed to each bottom of each side of the two semi-annular plates (126) away from each other, and an arc-shaped spring piece (128) is fixed to each side of the two T-shaped plates (127) away from each other. L-shaped plates (129) are fixed to both sides of the top surface of the bottom plate (1), and the two L-shaped plates (129) are located on the side of the two balance sensors (2) close to each other. The two L-shaped plates (129) are respectively located on the outer wall movement trajectory of the two arc-shaped spring pieces (128).

2. The center-of-mass adjustable special lifting equipment according to claim 1, characterized in that: Vertical rings (14) are fixed on all four sides of the top surface of the bottom plate (1), and a steel cable (15) is fixedly installed on the inner wall of each of the four vertical rings (14). A cross bar (16) is fixed on one end of the four steel cables (15) away from the four vertical rings (14), and a hook is provided in the middle of the top surface of the cross bar (16).

3. The center-of-mass adjustable special lifting equipment according to claim 2, characterized in that: An anti-slip groove is provided on the side where the two rubber plates (11) are close to each other. The two rubber plates (11) are located on both sides of the inner wall of the U-shaped frame (8). The two electric telescopic rods (10) are respectively located in the middle of the side where the two rubber plates (11) are away from each other.

4. The center-of-mass adjustable special lifting equipment according to claim 3, characterized in that: A connecting plate (131) is fixed to the bottom surface of each of the two semi-annular plates (126), a long rod (132) is fixed to the bottom surface of each of the two connecting plates (131), an outer wall of one of the long rods (132) has four ring vertical blocks (133), a chamfered plate (134) is fixed to the bottom surface of each of the two ring vertical blocks (133), and the four chamfered plates (134) are respectively located at the bottom of both sides of the U-shaped frame (8) in groups of two, and the bottom surfaces of the four chamfered plates (134) are in sliding contact with the top surface of the bottom plate (1).

5. The center-of-mass adjustable special lifting equipment according to claim 4, characterized in that: A horizontal bar (135) is fixed to the top surface of the two chamfered plates (134), a groove plate (136) is fixed to the bottom surface of one horizontal bar (135), a sponge block (137) is fixed to the top of the inner wall of each of the two groove plates (136), and the outer walls of the two sponge blocks (137) are in sliding contact with the inner wall of the slide groove of the bottom plate (1).

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