A self-balancing tower crane with crane end beam

Abstract

The invention discloses a self-balancing tower crane device with a crane end beam, comprising a tower body, wherein the upper end of the tower body is connected with a boom and a balancing arm, the lower end of the boom is slidably connected with a lifting trolley, the left end of the balancing arm is slidably connected with a U-shaped extension frame, the extension frame is slidably connected with a U-shaped balancing frame, a plurality of balancing blocks are placed on the balancing frame, two front-to-back symmetrical anti-falling components are arranged on the inner side of the balancing frame, a moving frame is slidably arranged on the upper end of the balancing frame, a lifting balancing component for lifting the balancing block is connected below the moving frame, two fixing components for fixing the balancing block are arranged below the lifting balancing component, two front-to-back symmetrical reduction motors are fixed on the balancing arm, and driving gears are fixed on the output ends of the reduction motors, and the extension frame and the balancing frame are arranged to facilitate extending the balancing arm, thereby increasing the weight range of the device for lifting heavy objects, and the extension frame and the balancing frame cooperate to extend and retract, so that the balancing arm is at a normal length for easy use.

Description

Technical Field

[0001] The invention relates to the technical field of cranes, in particular to a self-balancing tower crane device with a crane end beam. Background Art

[0002] Tower crane is also called tower crane, which originated in Western Europe. It is a rotating crane with a boom mounted on the top of a tall tower. It has a large working space and is mainly used for vertical and horizontal transportation of materials and installation of building components in house construction. It consists of three parts: metal structure, working mechanism and electrical system. The metal structure includes the tower body, boom and base. The working mechanism has four parts: lifting, luffing, rotation and travel. The electrical system includes motors, controllers, distribution cabinets, connecting lines, signals and lighting devices, etc.

[0003] Chinese patent application No. 202111297951.6 discloses a novel self-balancing trolley for tower crane, comprising a trolley body and a detachable counterweight (i.e., a counterweight); the main frame of the trolley body is composed of an end beam and a main beam; a support frame is provided on the end beam, and the counterweight is a box-shaped body, and its two side walls are symmetrically arranged with hanging ears, and the counterweight is installed on the support frame through the hanging ears, and it is easy to disassemble and assemble. Helical cylindrical gears are installed at both ends of the trolley end beam, and the gears of the two end beams rotate in opposite directions. The helical gears mesh with the helical rack-shaped tracks arranged on the tower crane balance arm to prevent wheel slippage; the lateral forces generated by the meshing of the gears and racks on both sides are in opposite directions to prevent the trolley from deviating from the track. The helical gears at both ends of the end beam are respectively equipped with a normally closed brake and a three-in-one motor. By controlling the release and clamping of the brake clamp and the motor drive, the movement of the trolley within a certain range is achieved. The present invention provides a self-balancing trolley for tower crane, which has the characteristics of fast response, safety and reliability, and a high degree of automation.

[0004] Chinese patent application No. 202220946533.9 discloses a crane beam that is easy to adjust balance, including a crane frame, a first gear and a second gear; the crane frame is vertically arranged; a beam frame is arranged at the upper end of the crane frame; the beam frame is horizontally arranged; after the hook hooks up the object, the reduction motor is started to drive the first gear to rotate, the first gear drives the first rack to slide horizontally, the first rack drives the trolley to move horizontally to the working position, and at the same time the reduction motor drives the shaft to rotate, the shaft drives the second gear to rotate, the second gear drives the second rack to move in the opposite direction of the first rack, the second rack drives the weight to move, and when the vehicle stops moving, the weight stops moving accordingly, so that the beam reaches a balanced state. The beam frame can be automatically balanced without manual operation.

[0005] The above solution still has the following problems during use:

[0006] When balancing a crane, the components of the balancing part will move the balancing arm on the crane, thereby achieving balance adjustment of the crane. However, the actual situation is that the length of the balancing arm is fixed. When balancing the crane, a larger range of adjustment cannot be achieved. At the same time, if the balancing arm is set too long, it will affect the rotation of the crane and affect the normal operation of the crane.

[0007] The counterweight on the existing balancing trolley is placed on the balancing trolley through another lifting device after the crane is assembled. As the height of the crane increases, the counterweight cannot be added to the balancing trolley, thereby limiting the lifting range of the crane.

[0008] When the counterweight is lifted, the counterweight will tilt due to the different hook positions, which will affect the placement of the counterweight on the balancing trolley. At the same time, the counterweight will swing during the lifting process, and the counterweight will easily fall off the hook. Summary of the invention

[0009] In view of the above problems, the present invention provides a crane end beam self-balancing tower crane device, which solves the above problems.

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a self-balancing tower crane device with a crane end beam, comprising a tower body, a boom and a balancing arm connected to the upper end of the tower body, a lifting trolley slidably connected to the lower end of the boom, a U-shaped extension frame slidably connected to the left end of the balancing arm, a U-shaped balancing frame slidably connected to the extension frame, a plurality of balancing blocks are placed on the balancing frame, two front-to-back symmetrical anti-falling assemblies are arranged on the inner side of the balancing frame, a mobile frame is slidably arranged on the upper end of the balancing frame, a lifting balancing assembly for hoisting the balancing block is connected below the mobile frame, and two fixing assemblies for fixing the balancing block are arranged below the lifting balancing assembly;

[0011] Two front-to-back symmetrical reduction motors are fixed on the balancing arm, and driving gears are fixed on the output ends of the reduction motors. Two front-to-back symmetrical racks are fixed on the extension frame, and the racks are transmission connected to the driving gears. The right ends of the two racks are provided with transmission gears rotatably connected to the extension frame. The left end of the extension frame is rotatably connected to two front-to-back symmetrical adjustment gears, and the adjustment gears are transmission connected to the transmission gears, and the transmission gears and the adjustment gears rotate in the same direction.

[0012] Preferably, the inner side of the extension frame is rotatably connected with a roller, the left end of the extension frame is provided with two front-to-rear symmetrical limit blocks, the lower end of the limit block is fixed with a top spring, the limit block is slidably connected to the extension frame, and a groove is provided on the right side of the lower end of the balance frame to prevent the balance frame from detaching from the extension frame, the groove corresponds to the limit block, and the limit block is a right-angled triangular prism.

[0013] Preferably, two rows of front-to-back symmetrical transmission teeth are provided at the upper end of the balance frame, two front-to-back symmetrical tracks are provided between two of the transmission teeth, the tracks are fixedly connected to the balance frame, two front-to-back symmetrical fixed beams are symmetrically fixed to the inner wall of the balance frame, the upper end of the fixed beam is wavy, the front and rear ends of the balance block are fixed with lifting rods, the lifting rods are clamped at the upper end of the fixed beams, and the transmission teeth, tracks and fixed beams are arranged in parallel.

[0014] Preferably, the anti-fall component includes two transverse plates rotatably connected to the balance frame, a torsion spring is provided at the rotational connection between the transverse plate and the balance frame, a groove for installing the anti-fall component is provided on the inner side of the balance frame, an eight-shaped limit frame is provided at the lower ends of the two transverse plates, a plurality of springs are fixed at the rear end of the limit frame, an electromagnet is commonly connected to the rear ends of the plurality of springs, the springs and the electromagnet are located in the groove of the balance frame, and the upper end of the limit frame is against the lower ends of the two transverse plates and is in the same horizontal plane.

[0015] Preferably, a winch drum is provided at the upper end of the mobile frame, and the rear end of the winch drum is connected to a driving motor through a reducer. The mobile frame is an inverted U-shape, and two front-to-rear symmetrical electric walking wheels are fixed to the lower end of the mobile frame. The electric walking wheels at the lower end of the mobile frame are located in the track of the balancing frame. A steel wire rope is wound around the winch drum, and the lower end of the steel wire rope on the winch drum is connected to the lifting balancing assembly.

[0016] Preferably, the lifting balance assembly includes a balance beam, a limit frame is fixed at the upper end of the balance beam, a transverse adjustment rod and a longitudinal adjustment rod are provided inside the limit frame, the transverse adjustment rod and the longitudinal adjustment rod are crossed in a cross shape, both ends of the transverse adjustment rod and the longitudinal adjustment rod are slidably connected to the limit frame, a connecting block is provided at the intersection of the transverse adjustment rod and the longitudinal adjustment rod, and the connecting block is slidably connected to the transverse adjustment rod and the longitudinal adjustment rod.

[0017] Preferably, a first adjusting motor and a second adjusting motor are fixed inside the connecting block, the first adjusting motor is connected to the transverse adjusting rod, the second adjusting motor is connected to the longitudinal adjusting rod, two spirit levels are fixed to the lower end of the balance beam, one of the spirit levels is placed transversely and the other is placed longitudinally, the front and rear ends of the balance beam are fixed with C-shaped hangers, the hangers are provided with arc grooves, and the movable frame is connected to the connecting block by a steel wire rope.

[0018] Preferably, the fixing assembly includes a connecting rod, which is slidably connected to the hanger of the lifting and balancing assembly. A tension spring is provided at the lower end of the connecting rod, and the lower end of the tension spring is fixedly connected to the lower end of the connecting rod. The upper end of the tension spring is fixedly connected to the lower end of the hanger. Two left-right symmetrical fixing plates are provided at the upper end of the connecting rod, and the upper ends of the fixing plates are bent outward. Pull ropes are fixed on the fixing plates, and the lower ends of the pull ropes pass through the hanger and are fixed with counterweights.

[0019] Preferably, the length of the balancing frame is greater than the length of the extending frame.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By setting the extension frame and the balance frame, it is beneficial to extend the balance arm, so as to increase the weight range of the device to lift heavy objects. At the same time, the extension frame and the balance frame cooperate to extend and retract, so that the balance arm is at a normal length, which is convenient for use. The driving gear is driven to rotate by the reduction motor, and the driving gear is engaged with the rack on the extension frame to make the extension frame extend from the balance arm, thereby extending the length of the balance arm. After the driving gear is engaged with the rack, it will be disengaged from the rack, and at this time, it will be engaged with the driving gear and the transmission gear. The transmission gear is connected with the adjustment gear and then drives the adjustment gear to rotate. The adjustment gear is engaged with the transmission gear to cause the balance frame to extend from the extension frame, so that the balance block on the balance frame extends outward. When the balance frame extends a certain distance, the top spring will push the limit block to be stuck in the groove at the lower end of the balance frame, preventing the balance frame from continuing to move outward and preventing the balance frame from separating from the extension frame. Since the limit block is a right-angled triangular prism, when the balance frame is retracted into the extension frame, due to the effect of the inclined surface of the limit block, the balance frame will be smoothly retracted into the extension frame.

[0022] 2. Through the cooperation of the winch drum and the lifting balance component, after the construction height of the device is raised, the balance block can still be hoisted and placed on the balance frame without the help of an external crane, which is convenient for increasing or reducing the weight of the counterweight. The fixed component at the lower end of the lifting balance component is clamped on the lifting rod of the balance block to fix the balance block. The drive motor works together with the winch drum and the reducer to lift the balance block on the fixed component. After completion, the mobile frame is moved by the electric walking wheel at the lower end of the mobile frame, and the balance block is placed on the fixed beam through the drive motor to complete the weight increase.

[0023] 3. The lifting rod of the balancing block is clamped by two fixing plates to fix the balancing block and prevent the balancing block from being separated from the hanger during lifting. Since the fixing assembly is located at the arc groove of the hanger, when the balancing block is lifted, the lifting rod presses down the connecting rod, and the connecting rod moves downward to stretch the tension spring. At the same time, the fixing plates are hindered by the arc groove, and the two fixing plates are close to each other to clamp and fix the lifting rod of the balancing block to prevent the lifting rod from being separated from the fixing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the balance arm of the present invention;

[0026] Figure 3 It is an overall schematic diagram of the self-balancing assembly of the present invention;

[0027] Figure 4 It is an overall schematic diagram of the extension frame of the present invention;

[0028] Figure 5 A schematic diagram of a balance frame of the present invention;

[0029] Figure 6 It is a schematic diagram of the overall structure of the mobile rack of the present invention;

[0030] Figure 7 It is a schematic diagram of the lifting balance assembly of the present invention;

[0031] Figure 8 It is an overall schematic diagram of the balance beam of the present invention;

[0032] Fig. 9 It is an overall schematic diagram of the fixing assembly of the present invention.

[0033] Explanation of the markings in the figure: 1. Tower body; 2. Extension frame; 3. Balancing frame; 4. Anti-fall assembly; 5. Mobile frame; 6. Lifting balancing assembly; 7. Fixed assembly; 11. Boom; 12. Balancing arm; 13. Lifting trolley; 14. Balancing block; 21. Rack; 22. Transmission gear; 23. Adjusting gear; 24. Roller; 25. Limit block; 26. Top spring; 31. Transmission gear; 32. Track; 33. Fixed beam; 41. Cross plate; 42. Limiting frame; 43. Spring; 44. Electromagnet; 51. Hoisting drum; 53. Driving motor; 61. Balance beam; 62. Limiting frame; 63. Connecting block; 64. Transverse adjustment rod; 65. Longitudinal adjustment rod; 66. Level; 67. First adjusting motor; 68. Second adjusting motor; 69. Hanger; 71. Connecting rod; 72. Tension spring; 73. Fixing plate; 74. Pull rope; 75. Counterweight; 121. Reduction motor; 122. Driving gear; 141. Lifting rod; 691. Arc groove. DETAILED DESCRIPTION

[0034] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] See also Figure 1 , Figure 2 and Figure 3A self-balancing tower crane device with crane end beam comprises a tower body 1, wherein the upper end of the tower body 1 is connected with a boom 11 and a balancing arm 12, wherein the tower body 1 is used to support the boom 11 and the balancing arm 12, and the overall height of the lifting device is increased by adding a plurality of tower bodies 1, thereby ensuring that the lifting device matches the height of the construction building, wherein the boom 11 is used to lift heavy objects, and the balancing arm 12 cooperates with a balancing block 14 to balance the heavy objects, and prevents the lifting device from being overweight at one end when lifting the heavy objects, wherein the lower end of the boom 11 is slidably connected with a lifting trolley 13, and the lifting trolley 13 slides on the boom 11, and the lifting trolley 13 hooks the heavy objects, and delivers the heavy objects to the designated place through the movement of the lifting trolley 13. The position is convenient for workers to carry out construction. The left end of the balance arm 12 is slidably connected with a U-shaped extension frame 2, and the extension frame 2 is slidably connected with a mouth-shaped balance frame 3. A plurality of balance blocks 14 are placed on the balance frame 3. By arranging the extension frame 2 and the balance frame 3, it is beneficial to extend the balance arm 12, so as to increase the weight range of the device for lifting heavy objects. At the same time, the extension frame 2 and the balance frame 3 cooperate to retract, so that the balance arm 12 is at a normal length, which is convenient for use. The plurality of balance blocks 14 on the balance frame 3 are used for counterweighting, so that the gravity at both ends of the balance arm 12 and the boom 11 of the device matches, and the situation that one end is heavier is prevented. Two front-to-rear symmetrical anti-falling components 4 are arranged on the inner side of the balance frame 3, and the upper end of the balance frame 3 slides There is a mobile frame 5, and a lifting balance component 6 is connected to the bottom of the mobile frame 5. The anti-falling component 4 limits and supports the lifting balance component 6. When the lifting balance component 6 lifts the balance block 14, the balance block 14 will swing. The lifting is limited by the anti-falling component 4. When the balance block 14 is raised to the highest point, the balance block 14 no longer swings. After the balance block 14 passes through the anti-falling component 4, the balance block 14 is placed on the fixed beam 33 of the balance frame 3 through the mobile frame 5. The anti-falling component 4 also plays a unidirectional role to prevent the balance block 14 from leaving the balance frame 3. Two front-to-back symmetrical fixing components 7 are arranged below the lifting balance component 6. The fixing component 7 fixes the hoisting rod 141 of the balance block 14 to prevent it from being lifted. When the balancing block 14 is in motion, the hanging rod 141 is separated from the hanger 69. Two front-to-back symmetrical reduction motors 121 are fixed on the balancing arm 12. The output ends of the reduction motors 121 are fixed with driving gears 122. Two front-to-back symmetrical racks 21 are fixed on the extension frame 2. The racks 21 are transmission-connected with the driving gears 122. The reduction motor 121 provides power to drive the driving gears 122 to rotate. At the same time, the driving gears 122 are transmission-connected with the racks 21, thereby driving the racks 21 to move, so that the extension frame 2 extends out from the inside of the balancing arm 12. The right ends of the two racks 21 are provided with transmission gears 22 rotationally connected to the extension frame 2. The left end of the extension frame 2 is rotationally connected with two front-to-back symmetrical adjustment gears 23.The adjusting gear 23 is in transmission connection with the transmission gear 22, and the transmission gear 22 and the adjusting gear 23 rotate in the same direction. After the extension frame 2 is extended from the balancing arm 12, the driving gear 122 will mesh with the transmission gear 22, and the transmission gear 22 is in transmission connection with the adjusting gear 23. The adjusting gear 23 is in transmission connection with the transmission gear 31 of the balancing frame 3, so that the balancing frame 3 is extended from the inside of the extension frame 2, and the self-balancing of the device is realized.

[0036] See also Figure 2 , Figure 3 , Figure 4 and Figure 5, considering that in the actual process, the length of the crane's balancing arm is fixed, when balancing the crane, the balancing trolley cannot achieve a large range of movement, thereby affecting the range of self-balancing adjustment. At the same time, if the balancing arm is set too long, it will affect the rotation of the crane and affect the normal operation of the crane. The extension frame 2 is evenly rotatably connected with a roller 24, and the left end of the extension frame 2 is provided with two front and rear symmetrical limit blocks 25. The lower end of the limit block 25 is fixed with a top spring 26. The limit block 25 is slidably connected to the extension frame 2, and the driving gear 122 is driven to rotate through the reduction motor 121. The driving gear 122 is engaged with the rack 21 on the extension frame 2 to make the extension frame 2 extend from the balancing arm 12, thereby extending the length of the balancing arm 12. When After the driving gear 122 is meshed with the rack 21, it will disengage from the rack 21, and at this time it will mesh with the driving gear 122 and the transmission gear 22, and the transmission gear 22 is connected to the adjusting gear 23 for transmission, thereby driving the adjusting gear 23 to rotate, and the adjusting gear 23 rotates to make the balancing frame extend. A groove is provided on the right side of the lower end of the balancing frame 3 to prevent the balancing frame 3 from disengaging from the extension frame 2, and the limit block 25 is in the shape of a right-angled triangular prism. When the balancing frame 3 is extended a certain distance, the top spring 26 will push the limit block 25 and get into the groove at the lower end of the balancing frame 3 to prevent the balancing frame 3 from continuing to move outward and prevent the balancing frame 3 from disengaging from the extension frame 2. Since the limit block 25 is in the shape of a right-angled triangular prism, when the balancing frame 3 is retracted into the extension frame 2, due to the inclined surface of the limit block 25 The balancing frame 3 will be smoothly retracted into the extension frame 2, and the top spring 26 will continue to be compressed. The upper end of the balancing frame 3 is provided with two rows of symmetrical transmission teeth 31 along its long side, and two front-to-back symmetrical tracks 32 are provided between the two transmission teeth 31. The tracks 32 are fixedly connected to the balancing frame 3, and the adjusting gear 23 is meshed with the transmission gear 31. The adjusting gear 23 rotates to cause the balancing frame 3 to extend from the extension frame 2, so that the balancing block 14 on the balancing frame 3 extends outward, thereby increasing the range of self-balancing adjustment. Two front-to-back symmetrical fixed beams 33 are symmetrically fixed to the inner wall of the balancing frame 3, and the upper ends of the fixed beams 33 are wavy. The front and rear ends of the balancing block 14 are fixed with hanging rods 141, and the hanging rods 141 are clamped on At the upper end of the fixed beam 33, the transmission gear 31, the track 32 and the fixed beam 33 are arranged in parallel, the hanging rod 141 of the balancing block 14 is clamped on the fixed beam 33, and the upper end of the fixed beam 33 is arranged in a wave shape to prevent the balancing block 14 from sliding back and forth on the fixed beam 33. The length of the balancing frame 3 is greater than the length of the extension frame 2. When the extension frame 2 and the balancing frame 3 are retracted, the reduction motor 121 rotates in the opposite direction, and the driving gear 122 drives the transmission gear 22 to rotate in the opposite direction. The transmission gear 22 and the adjusting gear 23 transmit, so that the balancing frame 3 is retracted into the interior of the extension frame 2. Since the length of the balancing frame 3 is greater than the length of the extension frame 2, after the balancing frame 3 completes the retraction of the extension frame 2, the balancing frame 3 will be against the extension frame 2.At this time, the adjustment gear 23 and the transmission gear 22 are no longer rotating, and the reduction motor 121 still drives the driving gear 122 to rotate, so that the transmission gear 22 pushes the balance arm 12, and then the driving gear 122 is re-transmitted with the rack 21, driving the extension frame 2 to be retracted into the balance arm 12, completing the retraction of the extension frame 2 and the balance frame 3.

[0037] See also Figure 2 , Figure 3 , Figure 4 and Figure 5 , considering that when the balancing block 14 is lifted to the highest point, the balancing block 14 is prevented from shaking, and considering that when the balancing block 14 is placed on the fixed beam 33, the hoisting rod 141 needs to be detached from the lifting balancing assembly 6 and fall on the fixed beam 33. In this process, the balancing block 14 may be detached from the fixed beam 33. The anti-falling assembly 4 includes two transverse plates 41 rotatably connected to the balancing frame 3. The rotation connection between the transverse plates 41 and the balancing frame 3 is provided with a torsion spring. The balancing block 14 is lifted by the mobile frame 5 and the lifting balancing assembly 6 After being located at the anti-falling assembly 4, the hanging rod 141 of the balancing block 14 will pass through the horizontal plate 41, and the horizontal plate 41 will rotate so that the hanging rod 141 passes through between the two horizontal plates 41. Due to the action of the torsion spring, the horizontal plate 41 is restored after rotation. Due to the support of the horizontal plate 41 by the limit frame 42, the horizontal plate 41 achieves a one-way passing effect to prevent the balancing block 14 from falling when it is placed. The inner side of the balancing frame 3 begins to have a groove for installing the anti-falling assembly 4, and the lower ends of the two horizontal plates 41 are provided with an eight-shaped limit frame 4 2. A plurality of springs 43 are fixed to the rear end of the limiting frame 42. The rear ends of the plurality of springs 43 are commonly connected to an electromagnet 44. The springs 43 and the electromagnet 44 are located in the groove of the balancing frame 3. The upper end of the limiting frame 42 abuts against the lower ends of the two cross plates 41 and is in the same horizontal plane. The eight-shaped limiting frame 42 limits the lifted balancing block 14 so that the balancing block 14 is limited therein to prevent the balancing block 14 from shaking, which is convenient for installing the balancing block 14. When the balancing block 14 is disassembled, the balancing block 14 needs to be To detach from the balancing frame 3 through the anti-fall component 4, the electromagnet 44 is energized at this time, and the limit frame 42 is attracted to the groove of the balancing frame 3. At this time, the spring 43 is compressed, and the limit frame 42 no longer supports the cross plate 41. At this time, the balancing block 14 presses the cross plate 41 to rotate downward when it falls. After the balancing block 14 passes through the cross plate 41, the cross plate 41 is restored by the action of the torsion spring. At the same time, the electromagnet 44 is de-energized, and the spring 43 pushes the limit frame 42 out of the groove of the balancing frame 3, and the limit frame 42 supports the cross plate 41 again.

[0038] See also Figure 2 , Figure 3 and Figure 6, considering that the balancing block 14 on the existing balancing trolley is placed on the balancing trolley by another lifting equipment after the crane is assembled, as the height of the crane becomes higher and higher, the balancing block 14 cannot be added to the balancing trolley, thereby limiting the lifting range of the crane, the upper end of the mobile frame 5 is provided with a winch drum 51, and the winch drum 51 cooperates with the lifting balance assembly 6. After the height of the device is raised, the balancing block 14 can still be hoisted and placed on the balancing frame 3 without the help of an external crane, which is convenient for increasing or reducing the weight of the counterweight. The lower end of the mobile frame 5 is provided with an eight-shaped reinforcing rib to support the mobile frame 5 to prevent deformation when the balancing block 14 is hoisted. At the same time, when the mobile frame 5 moves, it will drive the balancing block 14 to move, causing the balancing block 14 to shake. The balancing block 14 is clamped by the reinforcing rib to prevent shaking when the mobile frame 5 drives the balancing block 14 to move. The rear end of the hoisting drum 51 is connected to a driving motor 53 through a reducer transmission. The mobile frame 5 is an inverted U-shape. Two front-to-rear symmetrical electric running wheels are fixed to the lower end of the mobile frame 5. The electric running wheels at the lower end of the mobile frame 5 are located in the track 32 of the balancing frame 3. A wire rope is wound around the hoisting drum 51. The lower end of the wire rope on the hoisting drum 51 is connected to the lifting balancing component 6. The driving motor 53 works. The driving motor 53 cooperates with the hoisting drum 51 and the reducer to reel in the wire rope connecting the hoisting drum 51 and the lifting balancing component 6, and then lifts the balancing block 14 fixed on the fixed component 7. After the lifting of the balancing block 14 is completed, the mobile frame 5 is moved by the electric running wheels at the lower end of the mobile frame 5, and the balancing block 14 is moved to the fixed beam 33 of the balancing frame 3 to stop, and the balancing block 14 is placed on the fixed beam 33 by the driving motor 53 to complete the weight increase.

[0039] See also Figure 3 , Figure 6 , Figure 7 and Figure 8When the balance block 14 is hoisted, the balance block 14 will be tilted due to the different hook positions, which will affect the placement of the counterweight on the balance frame 3. The lifting balance assembly 6 includes a balance beam 61. Two levels 66 are fixed to the lower end of the balance beam 61. One of the two levels 66 is placed horizontally and the other is placed vertically. The two levels 66 judge the tilt direction of the balance beam 61, and then feed back the information to the first regulating motor 67 and the second regulating motor 68, so as to adjust the balance of the lifting balance assembly 6 and indirectly adjust the suspended balance block 14. The balance beam 61 A limit frame 62 is fixed at the upper end, and the limit frame 62 limits the transverse adjustment rod 64 and the longitudinal adjustment rod 65 so that the transverse adjustment rod 64 and the longitudinal adjustment rod 65 can only slide within the limit frame 62. The interior of the limit frame 62 is provided with a transverse adjustment rod 64 and a longitudinal adjustment rod 65, and the transverse adjustment rod 64 and the longitudinal adjustment rod 65 are crossed in a cross shape. The two ends of the transverse adjustment rod 64 and the longitudinal adjustment rod 65 are slidably connected to the limit frame 62, and a connecting block 63 is provided at the intersection of the transverse adjustment rod 64 and the longitudinal adjustment rod 65, and the connecting block 63 is slidably connected to the transverse adjustment rod 64 and the longitudinal adjustment rod 65. The fixing assembly 7 at the lower end of the lifting balance assembly 6 is clamped on the hanging rod 141 of the balance block 14 to fix the balance block 14. The first adjusting motor 67 and the second adjusting motor 68 are fixed inside the connecting block 63. The first adjusting motor 67 is connected to the lateral adjusting rod 64 by transmission, and the second adjusting motor 68 is connected to the longitudinal adjusting rod 65 by transmission. The front and rear ends of the balance beam 61 are fixed with C-shaped hangers 69, and the hangers 69 are provided with arc grooves 691. The movable frame 5 is connected to the connecting block 63 through a steel wire rope. After the level 66 detects the balance, when the front end of the balance beam 61 is high, the first adjusting motor 67 works to move the connecting block 63 toward the rear end of the balance beam 61. When the left end of the balance beam 61 is high, the second adjusting motor 68 works to move the connecting block 63 toward the right end of the balance beam 61. Through the movement of the connecting block 63, the force point connected with the steel wire rope and the balance beam 61 is adjusted, and then the lifting balance assembly 6 is adjusted so that it is no longer tilted.

[0040] See also Figure 3 , Figure 6 , Figure 7 and Fig. 9, considering that when the balance block 14 is lifted, in order to prevent the balance block 14 from detaching from the hanger 69, the fixing assembly 7 includes a connecting rod 71, and the connecting rod 71 is slidably connected to the hanger 69 of the lifting balance assembly 6, and the lower end of the connecting rod 71 is provided with a tension spring 72, and the lower end of the tension spring 72 is fixedly connected to the lower end of the connecting rod 71, and the upper end of the tension spring 72 is fixedly connected to the lower end of the hanger 69, and the upper end of the connecting rod 71 is provided with two left-right symmetrical fixing plates 73, and the upper ends of the fixing plates 73 are bent outward, and the fixing plates 73 are fixed with pull ropes 74, and the lower ends of the pull ropes 74 pass through the hanger 69 and are fixed with a counterweight 75, and the hoisting rod 141 of the balance block 14 is clamped by the two fixing plates 73, so that the balance block 14 is fixed. , to prevent the balancing block 14 from being separated from the hanger 69 during lifting. Since the fixing assembly 7 is located at the arc groove 691 of the hanger 69, when the balancing block 14 is lifted, the lifting rod 141 presses down the connecting rod 71, and the connecting rod 71 moves downward to stretch the tension spring 72. At the same time, the fixing plate 73 is hindered by the arc groove 691, and the two fixing plates 73 are close to each other to clamp and fix the lifting rod 141 of the balancing block 14 to prevent the lifting rod 141 from being separated from the fixing assembly 7. When the lifting rod 141 is separated, the lifting rod 141 will be supported by the fixed beam 33, and the lifting balancing assembly 6 continues to move downward. At this time, the tension spring 72 contracts to drive the connecting rod 71 to move upward, and the counterweight block 75 pulls the fixing plate 73 to open, so that the lifting rod 141 can be separated from the fixing assembly 7.

[0041] When the present invention is used:

[0042] First, after all parts are assembled, the drive motor 53 starts working. The drive motor 53 cooperates with the hoisting drum 51 and the reducer to loosen the wire rope connecting the hoisting drum 51 and the lifting balance component 6, and moves the lifting balance component 6 down to the balance block 14 on the ground. The balance block 14 is fixed on the fixed component 7, and the drive motor 53 rotates in the opposite direction to lift the balance block 14. After the lifting of the balance block 14 is completed, the lifting rod 141 presses down the connecting rod 71, and the connecting rod 71 moves down to stretch the tension spring 72. At the same time, the fixing plate 73 is hindered by the arc groove 691, and the two fixing plates 73 approach each other to clamp and fix the lifting rod 141 of the balance block 14 to prevent the lifting rod 141 from detaching from the fixed component 7.

[0043] Then, the balancing block 14 is lifted. When the balancing block 14 is lifted, the level meter 66 detects the balance of the lifting balancing assembly 6. When the front end of the balancing beam 61 is high, the first adjusting motor 67 works to move the connecting block 63 toward the rear end of the balancing beam 61. When the left end of the balancing beam 61 is high, the second adjusting motor 68 works to move the connecting block 63 toward the right end of the balancing beam 61. By moving the connecting block 63, the force point connecting the steel wire rope and the balancing beam 61 is adjusted, thereby adjusting the lifting balancing assembly 6 so that it is no longer tilted.

[0044] Next, the balancing block 14 is lifted by the mobile frame 5 and the lifting balancing assembly 6 and is located at the anti-falling assembly 4. The hanging rod 141 of the balancing block 14 passes through the cross plate 41, and the cross plate 41 rotates to make the hanging rod 141 pass through between the two cross plates 41. Due to the action of the torsion spring, the cross plate 41 recovers after rotation. Due to the support of the limit frame 42 on the cross plate 41, the cross plate 41 achieves a one-way passing effect to prevent the balancing block 14 from falling when it is placed. The electric running wheel at the lower end of the mobile frame 5 moves the mobile frame 5 to move the balancing block 14 The balance frame 3 moves to the fixed beam 33 and stops, and the balance block 14 is placed on the fixed beam 33 by the driving motor 53 to complete the weight increase. In the process of placing the balance block 14, the hoisting rod 141 needs to be separated from the fixed assembly 7. When the hoisting rod 141 is separated, the hoisting rod 141 will be supported by the fixed beam 33, and the lifting balance assembly 6 continues to move downward. At this time, the tension spring 72 contracts to drive the connecting rod 71 to move upward, and at the same time, the counterweight block 75 pulls the fixed plate 73 to open, so that the hoisting rod 141 is separated from the fixed assembly 7 to complete the weight increase.

[0045] Finally, when the lifting trolley 13 is lifting heavy objects, the reduction motor 121 works to control the extension and retraction of the extension frame 2 and the balance frame 3. The farther the lifting trolley 13 is from the tower body 1, the longer the extension frame 2 and the balance frame 3 are extended. When the lifting trolley 13 is closer to the tower body 1, the shorter the extension frame 2 and the balance frame 3 are extended, so that the two ends of the boom 11 and the balance arm 12 remain balanced, achieving a self-balancing effect.

[0046] 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 end beam self-balancing tower crane device, comprising a tower body (1), the upper end of the tower body (1) is connected to a boom (11) and a balance arm (12), the lower end of the boom (11) is slidably connected to a lifting trolley (13), characterized in that: The left end of the balancing arm (12) is slidably connected to a U-shaped extension frame (2), the extension frame (2) is slidably connected to a U-shaped balancing frame (3), a plurality of balancing blocks (14) are placed on the balancing frame (3), two front-to-back symmetrical anti-falling components (4) are arranged on the inner side of the balancing frame (3), a moving frame (5) is slidably connected to the upper end of the balancing frame (3), a lifting balancing component (6) for hoisting the balancing block (14) is connected below the moving frame (5), and two fixing components (7) for fixing the balancing block (14) are arranged below the lifting balancing component (6); Two front-to-back symmetrical reduction motors (121) are fixed on the balancing arm (12), and a driving gear (122) is fixed to the output end of each of the reduction motors (121). Two front-to-back symmetrical racks (21) are fixed on the extension frame (2), and the racks (21) are drivingly connected to the driving gear (122). The right ends of the two racks (21) are each provided with a transmission gear (22) rotatably connected to the extension frame (2). The left end of the extension frame (2) is rotatably connected to two front-to-back symmetrical adjustment gears (23), and the adjustment gears (23) are drivingly connected to the transmission gear (22). The transmission gear (22) and the adjustment gear (23) rotate in the same direction. The anti-falling component (4) comprises two transverse plates (41) rotatably connected to the balancing frame (3), a torsion spring is arranged at the rotatable connection between the transverse plates (41) and the balancing frame (3), a groove for mounting the anti-falling component (4) is provided on the inner side of the balancing frame (3), an eight-shaped limiting frame (42) is arranged at the lower ends of the two transverse plates (41), a plurality of springs (43) are fixed at the rear end of the limiting frame (42), and an electromagnet (44) is commonly connected to the rear ends of the plurality of springs (43), the springs (43) and the electromagnet (44) are located in the groove of the balancing frame (3), and the upper end of the limiting frame (42) abuts against the lower ends of the two transverse plates (41) and is located in the same horizontal plane.

2. The self-balancing tower crane equipment with crane end beam according to claim 1, characterized in that: The inner side of the extension frame (2) is rotatably connected to a roller (24), the left end of the extension frame (2) is provided with two front-to-rear symmetrical limit blocks (25), the lower end of the limit block (25) is fixed with a top spring (26), the limit block (25) is slidably connected to the extension frame (2), and a groove is provided on the right side of the lower end of the balance frame (3) to prevent the balance frame (3) from separating from the extension frame (2), the groove corresponds to the limit block (25), and the limit block (25) is in the shape of a right-angled triangular prism.

3. The self-balancing tower crane equipment with crane end beam according to claim 1, characterized in that: The upper end of the balancing frame (3) is provided with two rows of front-to-back symmetrical transmission teeth (31), two front-to-back symmetrical tracks (32) are provided between the two transmission teeth (31), the tracks (32) are fixedly connected to the balancing frame (3), the inner wall of the balancing frame (3) is symmetrically fixed with two front-to-back symmetrical fixed beams (33), the upper ends of the fixed beams (33) are wavy, the front and rear ends of the balancing block (14) are both fixed with hanging rods (141), the hanging rods (141) are clamped on the upper ends of the fixed beams (33), and the transmission teeth (31), the tracks (32) and the fixed beams (33) are arranged in parallel.

4. The self-balancing tower crane equipment with crane end beam according to claim 1, characterized in that: A hoisting drum (51) is provided at the upper end of the mobile frame (5), and a rear end of the hoisting drum (51) is connected to a driving motor (53) via a reducer transmission. The mobile frame (5) is in an inverted U shape, and two front-to-rear symmetrical electric running wheels are fixed to the lower end of the mobile frame (5). The electric running wheels at the lower end of the mobile frame (5) are located in the track (32) of the balancing frame (3). A steel wire rope is wound around the hoisting drum (51), and the lower end of the steel wire rope on the hoisting drum (51) is connected to a lifting balancing assembly (6).

5. The self-balancing tower crane equipment with crane end beam according to claim 1, characterized in that: The lifting balance component (6) comprises a balance beam (61), a limit frame (62) is fixed at the upper end of the balance beam (61), a transverse adjustment rod (64) and a longitudinal adjustment rod (65) are arranged inside the limit frame (62), the transverse adjustment rod (64) and the longitudinal adjustment rod (65) are crossed in a cross shape, both ends of the transverse adjustment rod (64) and the longitudinal adjustment rod (65) are slidably connected to the limit frame (62), a connecting block (63) is arranged at the intersection of the transverse adjustment rod (64) and the longitudinal adjustment rod (65), and the connecting block (63) is slidably connected to the transverse adjustment rod (64) and the longitudinal adjustment rod (65).

6. The self-balancing tower crane equipment with crane end beam according to claim 5, characterized in that: A first adjustment motor (67) and a second adjustment motor (68) are fixed inside the connecting block (63); the first adjustment motor (67) is connected to the transverse adjustment rod (64) by transmission; the second adjustment motor (68) is connected to the longitudinal adjustment rod (65) by transmission; two levels (66) are fixed to the lower end of the balance beam (61); one of the levels (66) is placed transversely and the other level (66) is placed longitudinally; a C-shaped hanger (69) is fixed to the front and rear ends of the balance beam (61); an arc groove (691) is provided on the hanger (69); and the movable frame (5) is connected to the connecting block (63) by a steel wire rope.

7. The self-balancing tower crane equipment with crane end beam according to claim 6, characterized in that: The fixing assembly (7) comprises a connecting rod (71), wherein the connecting rod (71) is slidably connected to a hanger (69) of a lifting and balancing assembly (6), a tension spring (72) is provided at the lower end of the connecting rod (71), the lower end of the tension spring (72) is fixedly connected to the lower end of the connecting rod (71), the upper end of the tension spring (72) is fixedly connected to the lower end of the hanger (69), and the upper end of the connecting rod (71) is provided with two left-right symmetrical fixing plates (73), the upper ends of the fixing plates (73) are bent outwards, and the fixing plates (73) are fixed with pull ropes (74), and the lower ends of the pull ropes (74) pass through the hanger (69) and are fixed with a counterweight (75).

8. The self-balancing tower crane equipment with crane end beam according to claim 1, characterized in that: The length of the balancing frame (3) is greater than the length of the extension frame (2).

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