Safe bridge crane capable of preventing top rushing

Abstract

The invention relates to the technical field of hoisting equipment, in particular to an anti-top-rushing safe bridge crane. Comprising a lifting hook frame, the measuring mechanism is arranged on the lifting hook frame and comprises a mounting disc, a rotating shaft and a rotating shaft; the rotating disc is rotationally arranged on the mounting disc, and the rotating disc and the mounting disc are jointly connected with a plug pin in an inserted mode; the pair of guide blocks are arranged on the rotating disc in a sliding manner; the shear fork frame is mounted on the pair of guide blocks; the telescopic rod is arranged on the mounting disc, and the telescopic end of the telescopic rod fixedly penetrates through the shear fork frame. Through the design of the measuring mechanism, the height of the highest point of goods can be measured, the telescopic end of the telescopic rod can correspondingly extend according to the height of the highest point of the goods, and when the crane hoists the goods, the lifting mechanism can cut off power transmission in time according to the measuring result of the measuring mechanism, so that the top rushing accident is effectively prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting equipment, and in particular to a safety bridge crane that is anti-top impact. Background Art

[0002] Bridge cranes have the characteristics of compact structure, smooth operation and low noise. They can adapt to various harsh environments and can be widely used in mining, construction, ports, logistics and other fields.

[0003] During the use of bridge cranes in the prior art, in order to prevent topping accidents, the position of the hook is monitored by a limiter or other means. When the distance between the hook and the lifting component is close, the lifting component can be controlled to stop running in time. This method can only prevent topping accidents caused by collision between the hook and the lifting component. When a part of the hoisted cargo is higher than the hook, the above method is no longer applicable. In this case, the height of the highest point of the cargo needs to be measured, and the lifting height limit position of the hook needs to be adjusted according to the measurement results. Otherwise, the cargo will collide with the crane beam, resulting in a topping accident. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a safety bridge crane that is anti-top impact.

[0005] The technical implementation scheme of the present invention is: a safety bridge crane with anti-top impact, comprising a hook frame; The measuring mechanism is arranged on the hook frame and includes: A mounting plate, the mounting plate being fixedly mounted on the hook frame; A rotating disk, the rotating disk being rotatably mounted on the mounting disk, wherein a latch is commonly connected to the rotating disk and the mounting disk; guide blocks, a pair of which are both slidably mounted on the rotating disk; a scissor frame, the scissor frame being mounted on a pair of guide blocks; A telescopic rod, the telescopic rod being arranged on the mounting plate, the telescopic end of the telescopic rod being fixedly passed through the scissor frame; The lifting mechanism is arranged on the upper side of the mounting plate, and the measuring mechanism can control the power transmission of the lifting mechanism.

[0006] Furthermore, the measuring mechanism also includes a T-shaped plate, the T-shaped plate is slidably installed on the top of the rotating disk, and a pull rope is connected between the T-shaped plate and the two guide blocks respectively. Two guide wheels for guiding the pull rope are installed on the top of the rotating disk, and a take-up wheel is rotatably installed on the rotating disk, and the reducer is installed. One end of the steel cable is connected to the T-shaped plate, and the other end of the steel cable is wound around the take-up wheel. One end of the wheel axle of the take-up wheel is connected to the output end of the reducer, and an elastic wire box is rotatably installed on the rotating disk, and one end of the rotating shaft of the elastic wire box is connected to the input end of the reducer.

[0007] Furthermore, the measuring mechanism also includes a rotating frame, the top of the rotating disk is hinged to the rotating frame through a support plate, a sleeve is fixedly mounted on the rotating frame and is sleeved on the outside of the elastic wire box harness, and an indicator rod is fixedly mounted on the rotating frame.

[0008] Furthermore, the measuring mechanism also includes a bidirectional screw, which is installed on the top of the rotating disk. A pair of push blocks that cooperate with the guide blocks are threadedly connected to the bidirectional screw.

[0009] Furthermore, the measuring mechanism also includes an air valve, and the outer wall of the telescopic rod is connected to the air valve.

[0010] Furthermore, the lifting mechanism includes a push rod, the telescopic end of the telescopic rod is elastically hinged to the push rod, a reducer is provided on the upper side of the push rod, a spline sleeve is fixedly installed on the output end of the reducer, a spline shaft is elastically slidably installed in the spline sleeve, the outer wall of the spline shaft is provided with a sleeve plate that cooperates with the push rod, a reel is provided on one side of the spline shaft, and a spline groove that cooperates with the spline shaft is opened at one end of the reel.

[0011] Furthermore, the lifting mechanism also includes an elastic wedge block, the elastic wedge block is slidably installed in the spline sleeve, and the outer wall of the spline shaft is provided with a locking groove that matches the elastic wedge block.

[0012] Furthermore, it also includes a limiting mechanism, which includes the gear. The gear is fixedly sleeved on one end of the reel, and a hydraulic rod is provided on one side of the gear. The telescopic end of the hydraulic rod is fixedly installed with a rack that matches the gear.

[0013] Furthermore, an unlocking mechanism is included, which includes a circular ring, a rotating sleeve on the spline sleeve is provided with the circular ring, the circular ring is connected to the reducer through a support rod, a groove is provided on the circular ring, a slider is slidably installed in the groove, an unlocking block is installed on the top of the slider through an elastic telescopic shaft, the unlocking block is movably connected to the inner wall of the groove of the circular ring, a convex shaft matching the unlocking block is fixedly installed on one side of the elastic wedge block, and a vertical groove for the convex shaft to move is provided through one side of the spline sleeve.

[0014] Furthermore, it also includes a limiting block, which is fixedly installed in the groove of the ring, and a slot that matches the limiting block is opened on one side of the unlocking block.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can measure the highest point height of the cargo through the design of the measuring mechanism. The telescopic end of the telescopic rod can extend accordingly according to the highest point height of the cargo. When the crane is lifting the cargo, the lifting mechanism can promptly disconnect the power transmission according to the measurement result of the measuring mechanism, thereby effectively preventing the occurrence of top collision accidents.

[0016] 2. Through the design of the sleeve and the indicator rod, the present invention enables the wire harness in the elastic wire box to squeeze the inner wall of the sleeve when the wire harness is pulled out, so that the rotating frame drives the indicator rod to move. The staff observes the angle of the indicator rod and rotates the bidirectional lead screw according to the angle of the indicator rod, which can cause the telescopic end of the telescopic rod to extend a second time, further improving the measurement accuracy of the measuring mechanism.

[0017] 3. The present invention designs the unlocking block and the limit block. When the hoisted cargo is lifted, the limit block will not limit the unlocking block. The unlocking block can be completely slid into the groove of the circular ring after being squeezed by the convex shaft on the elastic wedge block. When the hoisted cargo falls, the limit block can limit the unlocking block, thereby causing the elastic wedge block to disengage from the locking groove on the spline shaft. The spline shaft can automatically fit into the spline groove of the drum, thereby restoring the power transmission of the lifting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the present invention as a whole; Figure 2 It is a structural schematic diagram of the measuring mechanism of the present invention; Figure 3 This is a schematic diagram of the installation of the guide block of the present invention; Figure 4 This is a schematic diagram of the installation of the reduction gearbox of the present invention; Figure 5 This is a schematic diagram of the installation of the rotating frame of the present invention; Figure 6This is a schematic diagram of the installation of the bidirectional screw of the present invention; Figure 7 It is a structural schematic diagram of the lifting mechanism of the present invention; Figure 8 This is a schematic diagram of the installation of the sleeve plate of the present invention; Figure 9 This is a schematic diagram of the installation of the elastic wedge block of the present invention; Figure 10 This is a schematic diagram of the installation of the rack of the present invention; Figure 11 It is a structural schematic diagram of the ring of the present invention; Figure 12 This is a structural diagram of the unlocking block of the present invention.

[0019] In the figure: 1. Hook frame, 201. Mounting plate, 202. Rotating plate, 203. Guide block, 204. Scissor frame, 205. Telescopic rod, 301. T-shaped plate, 302. Take-up wheel, 303. Reducer, 304. Elastic line box, 305. Rotating frame, 306. Casing, 307. Indicator rod, 308. Bidirectional screw, 309. Push block, 401. Air valve, 501. Push rod, 502. Reducer, 503. Spline sleeve, 504. Spline shaft, 505. Bushing, 506. Reel, 601. Elastic wedge block, 701. Gear, 702. Hydraulic rod, 703. Rack, 801. Ring, 802. Slider, 803. Unlocking block, 901. Limit block. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0021] Example 1 A safety bridge crane with anti-top impact protection, such as Figure 1-Figure 3 As shown, it includes a hook frame 1, and the hook frame 1 is provided with a measuring mechanism for measuring the highest point of the cargo, the measuring mechanism includes a mounting plate 201 fixedly mounted on the hook frame 1, a rotating disk 202 is rotatably mounted on the top of the mounting plate 201, and the rotating disk 202 and the mounting plate 201 are commonly plugged with a pin, a pair of guide blocks 203 are slidably mounted on the top of the rotating disk 202, and a scissor frame 204 is commonly installed on the pair of guide blocks 203, a telescopic rod 205 is fixedly mounted on the top of the mounting plate 201, and the telescopic end of the telescopic rod 205 is fixedly passed through the scissor frame 204, and a lifting mechanism is provided on the upper side of the mounting plate 201. When the highest point of the cargo is close to the crossbeam of the crane, the measuring mechanism can disconnect the power transmission of the lifting mechanism.

[0022] like Figure 3-Figure 5 As shown, the measuring mechanism also includes a T-shaped plate 301, a T-shaped plate 301 is horizontally slidably installed on the top of the rotating disk 202, and a pull rope is connected between the T-shaped plate 301 and the two guide blocks 203 respectively. Two guide wheels for guiding the pull rope are installed on the top of the rotating disk 202, and the pull rope is wound on the guide wheels. A take-up wheel 302 located at the rear side of the T-shaped plate 301 is rotatably installed on the rotating disk 202, and a reduction gear box 303 is installed. One end of the steel cable is connected to the rear side of the T-shaped plate 301, and the other end of the steel cable is wound around the take-up wheel 302. One end of the wheel axle of the take-up wheel 302 is connected to the output end of the reduction gear box 303, and an elastic wire box 304 located at the rear side of the take-up wheel 302 is rotatably installed on the rotating disk 202, and one end of the rotating shaft of the elastic wire box 304 is connected to the input end of the reduction gear box 303.

[0023] like Figure 4 and Figure 5 As shown, the measuring mechanism also includes a rotating frame 305. The top of the rotating disk 202 is hinged with the rotating frame 305 through a support plate. A ratchet structure is provided between the rotating frame 305 and the support plate. The ratchet structure is used to limit the rotating frame 305 (the ratchet structure is a prior art and will not be described in detail). The rotating frame 305 is located on the rear side of the elastic wire box 304. A sleeve 306 is fixedly installed on the right side of the rotating frame 305 and is sleeved on the outside of the wire harness of the elastic wire box 304. An indicator rod 307 is fixedly installed on the rotating frame 305, and a scale for comparison with the indicator rod 307 is engraved on the support plate.

[0024] like Figure 6 As shown, the measuring mechanism also includes a bidirectional screw 308. The bidirectional screw 308 is rotatably installed on the top of the rotating disk 202. A pair of push blocks 309 that cooperate with the guide blocks 203 are threadedly connected to the bidirectional screw 308. When the bidirectional screw 308 rotates, the two push blocks 309 can push the two guide blocks 203 respectively.

[0025] like Figure 3 As shown, the measuring mechanism further includes an air valve 401 . The outer wall of the telescopic rod 205 is connected to the air valve 401 . The air valve 401 is used to control the amount of air in the inner cavity of the telescopic rod 205 .

[0026] Initially, the latch is disengaged from the mounting plate 201 and the rotating plate 202, and the telescopic end of the telescopic rod 205 is in a retracted state. The cargo is first hoisted by the crane hook, and the wire rope between the hook frame 1 and the crane is straightened, and the cargo remains in contact with the ground. When a certain part of the cargo is higher than the hook, since the highest point of the cargo is uncertain, it is necessary to calibrate the position of the highest point of the cargo, and the staff pulls the handle on the wire harness of the elastic wire box 304, and drives the rotating plate 202 to rotate through the handle on the wire harness of the elastic wire box 304, and finally makes the highest point of the cargo, the elastic wire box 304 and the telescopic rod 205 aligned in the horizontal direction. At this time, continue to pull the handle on the wire harness of the elastic wire box 304 to pull out the wire harness in the elastic wire box 304, and the rotating shaft of the elastic wire box 304 drives the take-up wheel 302 to rotate slowly through the reduction box 303, and the take-up wheel 302 pulls the T-shaped plate 301 to slide through the steel cable, and the T-shaped plate 301 passes through two The pull rope pulls the two guide blocks 203 to slide toward each other, and the scissor frame 204 extends upward under the action of the two guide blocks 203. The scissor frame 204 drives the telescopic end of the telescopic rod 205 to extend upward, and external air enters the inner cavity of the telescopic rod 205 through the air valve 401 until the handle on the wire harness of the elastic wire box 304 moves to the highest point of the cargo. Then, the handle on the wire harness of the elastic wire box 304 is no longer pulled, and the wire harness of the elastic wire box 304 is elastically wound. The rotating shaft of the elastic wire box 304 drives the take-up wheel 302 to rotate slowly through the reduction gear 303, the steel cable between the take-up wheel 302 and the T-shaped plate 301 is relaxed, and the pull rope between the T-shaped plate 301 and the guide block 203 is relaxed. At this time, the T-shaped plate 301 cannot be reset, and the air in the inner cavity of the telescopic rod 205 cannot be discharged through the air valve 401, so that the telescopic end of the telescopic rod 205 cannot be retracted, thereby preventing the telescopic end of the telescopic rod 205 from being reset when the wire harness of the elastic wire box 304 is wound.

[0027] Initially, the two push blocks 309 are in contact with the two guide blocks 203 respectively. After the two guide blocks 203 slide close to each other, the two guide blocks 203 are no longer in contact with the two push blocks 309. Since the highest point of each cargo is different and the horizontal distance between the highest point and the elastic box 304 is different, the extension distance of the telescopic end of the telescopic rod 205 needs to be accurately adjusted according to the height and position of the highest point of different cargoes. When the wire harness of the elastic box 304 is pulled out, the wire harness of the elastic box 304 squeezes the inner wall of the sleeve 306, and the sleeve 306 is forced to drive the rotating frame 305 to rotate upward, and the rotating frame 305 drives the indicator rod 307 to move. When the wire harness of the elastic box 304 is wound, the ratchet structure between the rotating frame 305 and the support plate limits the rotating frame 305, so that the rotating frame 305 cannot be reset. The position of the indicator rod 307 is thereby kept stable. The staff then observes the indicator rod 307 and the scales on the support plate, and rotates the bidirectional screw 308 to a corresponding angle. The two push blocks 309 move closer to each other under the action of the bidirectional screw 308. Subsequently, the two push blocks 309 contact the two guide blocks 203 respectively, and push the two guide blocks 203 to move closer to each other, thereby causing the telescopic end of the telescopic rod 205 to extend a second time. When the horizontal distance between the highest point of the cargo and the elastic line box 304 is closer, the rotation angle of the indicator rod 307 is larger, thereby causing the telescopic end of the telescopic rod 205 to extend a longer distance. When the horizontal distance between the highest point of the cargo and the elastic line box 304 is farther, the rotation angle of the indicator rod 307 is smaller, thereby causing the telescopic end of the telescopic rod 205 to extend a shorter distance.

[0028] After completing the above steps, the rotating disk 202 is rotated to reset, and the latch is inserted into the mounting disk 201 and the rotating disk 202 .

[0029] Example 2 like Figure 6-Figure 8 As shown, the lifting mechanism includes a push rod 501, the telescopic end of the telescopic rod 205 is elastically hinged with the push rod 501, and a reducer 502 is provided on the upper side of the push rod 501, which is fixedly mounted on the traveling trolley of the crane, and a spline sleeve 503 is fixedly mounted on the output end of the reducer 502, and a spline shaft 504 is elastically slidably mounted in the spline sleeve 503, and the outer wall of the spline shaft 504 is rotatably sleeved with a sleeve plate 505 that cooperates with the push rod 501. When the push rod 501 contacts the sleeve plate 505, the spline shaft 504 can slide toward the side close to the reducer 502, and a drum 506 is provided on the front side of the spline shaft 504, which is rotatably mounted on the traveling trolley of the crane, and a spline groove that cooperates with the spline shaft 504 is opened at the rear end of the drum 506.

[0030] like Figure 9As shown, the lifting mechanism also includes an elastic wedge block 601, which is slidably installed in the spline sleeve 503, and the outer wall of the spline shaft 504 is provided with a locking groove that matches the elastic wedge block 601. When the elastic wedge block 601 is stuck in the locking groove, the spline shaft 504 can be limited.

[0031] like Figure 10 As shown, it also includes a limiting mechanism, which includes a gear 701. The rear end of the reel 506 is fixedly sleeved with the gear 701. A hydraulic rod 702 is provided on the right side of the gear 701. The hydraulic rod 702 is fixedly mounted on the traveling trolley of the crane. The telescopic end of the hydraulic rod 702 is fixedly mounted with a rack 703 that cooperates with the gear 701. When the rack 703 is engaged with the gear 701, the reel 506 can be limited to prevent the reel 506 from rotating freely.

[0032] like Figure 11 and Figure 12 As shown, it also includes an unlocking mechanism, which includes a ring 801. The outer wall of the spline sleeve 503 is rotatably sleeved with a ring 801, and the ring 801 is fixed to the reducer 502 through a support rod. The outer wall of the ring 801 is provided with a groove, and a slider 802 is slidably installed in the groove. The top of the slider 802 is provided with an unlocking block 803 through an elastic telescopic shaft. The unlocking block 803 is movably connected to the inner wall of the groove, and a convex shaft that cooperates with the unlocking block 803 is fixedly installed on the rear side of the elastic wedge block 601. A vertical groove for the convex shaft to move is penetrated through the rear side of the spline sleeve 503.

[0033] like Figure 12 As shown, it also includes a limiting block 901, which is fixedly installed in the groove of the ring 801. A slot that matches the limiting block 901 is opened on one side of the unlocking block 803. When the limiting block 901 fits into the slot of the unlocking block 803, the unlocking block 803 can be limited.

[0034] At the beginning, the limiting block 901 is not clamped into the clamping groove of the unlocking block 803, the spline shaft 504 is inserted into the spline groove of the winding drum 506, and when the extension end of the telescopic rod 205 is extended, the push rod 501 is lifted upward, and when the telescopic rod 205 is extended for the second time, the position of the push rod 501 is higher than the highest point of the goods. The crane is controlled to operate, so that the output end of the speed reducer 502 drives the spline sleeve 503 to drive the spline shaft 504 to rotate counterclockwise, the spline shaft 504 drives the winding drum 506 to rotate, the lifting hook lifts the goods, the lifting hook frame 1 drives the rotating disc 202 to lift upward through the mounting disc 201, the rotating disc 202 drives the push rod 501 to lift upward through the telescopic rod 205, and the elastic wedge block 601 is driven to move by the spline sleeve 503. Then the convex shaft on the elastic wedge block 601 contacts and extrudes the right side slope of the unlocking block 803. At this time, the elastic force of the elastic telescopic shaft is smaller than the elastic force of the elastic wedge block 601, the telescopic end of the elastic telescopic shaft is retracted under the drive of the unlocking block 803, the unlocking block 803 is completely slid into the groove of the circular ring 801, then the convex shaft passes the unlocking block 803 and no longer contacts it, the telescopic end of the elastic telescopic shaft releases and drives the unlocking block 803 to slide and reset, and then the above steps are repeated until the push rod 501 contacts the front side of the sleeve plate 505. The push rod 501 is elastically retracted and rotated and extrudes the sleeve plate 505, the sleeve plate 505 is driven to slide the spline shaft 504 to the side close to the speed reducer 502, then the extension end of the hydraulic rod 702 is extended, the extension end of the hydraulic rod 702 drives the rack 703 to move, and the rack 703 is engaged with the rack 703. At this time, the winding drum 506 still rotates, the movement speed of the gear 701 after being engaged with the rack 703 is the same as the movement speed of the speed reducer 502, and the gear 701 and the rack 703 will not produce misalignment movement. Then the locking slot of the spline shaft 504 is aligned with the elastic wedge block 601, the elastic wedge block 601 is released and slid into the locking slot of the spline shaft 504 to limit the spline shaft 504, and when the spline shaft 504 is separated from the spline groove of the winding drum 506, the rack 703 can limit the winding drum 506 by being engaged with the gear 701. Thus, the power transmission of the lifting mechanism can be cut off, the goods can be prevented from contacting the cross beam of the crane to cause a collision accident, the goods can be prevented from falling when the power transmission of the lifting mechanism is cut off, and there is still a gap between the highest point of the goods and the cross beam of the crane. Thus, the goods can be effectively prevented from swinging during lifting and causing a collision accident.

[0035] When the cargo needs to be put down, the crane is controlled to operate so that the output end of the reducer 502 drives the spline shaft 504 to rotate clockwise through the spline sleeve 503, and the spline sleeve 503 drives the elastic wedge block 601 to move. Then the convex shaft on the elastic wedge block 601 contacts and squeezes the left inclined surface of the unlocking block 803. The unlocking block 803 is forced to slide in the groove of the ring 801 through the elastic telescopic shaft. Then the slot of the unlocking block 803 contacts the limit block 901, the slider 802 contacts the end of the groove, the unlocking block 803 contacts the end of the groove, and the limit The block 901 limits the unlocking block 803 through the slot of the unlocking block 803, so that the unlocking block 803 can squeeze the convex shaft on the elastic wedge block 601. The convex shaft is forced to shrink and slide the elastic wedge block 601. After sliding, the elastic wedge block 601 disengages from the locking slot on the spline shaft 504. The spline shaft 504 elastically slides and resets, and at the same time controls the telescopic end of the hydraulic rod 702 to shrink. The telescopic end of the hydraulic rod 702 drives the rack 703 to move. The gear 701 drives the reel 506 to rotate under the action of the rack 703, thereby causing the hook to drive the cargo to fall. It is worth noting that the gear 7 The movement speed of 01 after meshing with the rack 703 is the same as the movement speed of the reducer 502. When the spline shaft 504 slides elastically, the spline shaft 504 is aligned with the spline groove of the drum 506, thereby ensuring that the spline shaft 504 is smoothly inserted into the spline groove of the drum 506, and the power transmission of the lifting mechanism is restored. At the same time, the rack 703 is disengaged from the gear 701, and the telescopic end of the hydraulic rod 702 continues to contract to drive the rack 703 to reset. The output end of the reducer 502 continues to drive the spline shaft 504 to rotate clockwise through the spline sleeve 503, thereby causing the hook to drive the cargo to fall, and the hook frame The mounting plate 201 drives the rotating plate 202 to descend, and the rotating plate 202 drives the push rod 501 to descend via the telescopic rod 205. The push rod 501 gradually elastically rotates and resets when descending, and no longer contacts the sleeve plate 505. After the cargo is put down, the bidirectional lead screw 308 is rotated, and the two push blocks 309 move away from each other under the action of the bidirectional lead screw 308 and reset. Then, the air valve 401 is opened to discharge the air in the cavity of the telescopic rod 205 through the air valve 401. The telescopic end of the telescopic rod 205 contracts and resets under the action of its own weight, and drives the scissor frame 204 and the push rod 501 to reset.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A safety bridge crane with anti-top impact protection, characterized by: It includes a hook frame (1); The measuring mechanism is arranged on the hook frame (1), and the measuring mechanism includes: A mounting plate (201), the mounting plate (201) being fixedly mounted on the hook frame (1); A rotating disk (202), the rotating disk (202) being rotatably mounted on the mounting disk (201), and a latch being plugged into both the rotating disk (202) and the mounting disk (201); Guide blocks (203), a pair of guide blocks (203) are both slidably mounted on the rotating disk (202); a scissor frame (204), the scissor frame (204) being mounted on a pair of guide blocks (203); a telescopic rod (205), the telescopic rod (205) being arranged on the mounting plate (201), the telescopic end of the telescopic rod being fixedly passed through the scissor frame (204); A lifting mechanism is provided on the upper side of the mounting plate (201), and a measuring mechanism is capable of controlling the power transmission of the lifting mechanism.

2. The anti-top impact safety bridge crane according to claim 1, characterized in that: The measuring mechanism further comprises a T-shaped plate (301), the T-shaped plate (301) being slidably mounted on the top of the rotating disk (202), a pull rope being respectively connected between the T-shaped plate (301) and the two guide blocks (203), two guide wheels for guiding the pull rope being mounted on the top of the rotating disk (202), a take-up wheel (302) being rotatably mounted on the rotating disk (202), and the reduction box (303) being mounted thereon, one end of a steel rope being connected to the T-shaped plate (301), the other end of the steel rope being wound around the take-up wheel (302), one end of a wheel shaft of the take-up wheel (302) being connected to the output end of the reduction box (303), an elastic wire box (304) being rotatably mounted on the rotating disk (202), and one end of a rotating shaft of the elastic wire box (304) being connected to the input end of the reduction box (303).

3. The anti-top impact safety bridge crane according to claim 2, characterized in that: The measuring mechanism further comprises a rotating frame (305), the top of the rotating disk (202) is hingedly connected to the rotating frame (305) via a support plate, a sleeve (306) sleeved on the outside of the wire harness of the elastic wire box (304) is fixedly mounted on the rotating frame (305), and an indicator rod (307) is fixedly mounted on the rotating frame (305).

4. The anti-top impact safety bridge crane according to claim 3, characterized in that: The measuring mechanism also includes a bidirectional screw (308), the bidirectional screw (308) is installed on the top of the rotating disk (202), and a pair of push blocks (309) that match the guide block (203) are threadedly connected to the bidirectional screw (308).

5. The anti-top impact safety bridge crane according to claim 4, characterized in that: The measuring mechanism further comprises an air valve (401), and the outer wall of the telescopic rod (205) is connected to the air valve (401).

6. The anti-top impact safety bridge crane according to claim 5, characterized in that: The lifting mechanism includes a push rod (501), the telescopic end of the telescopic rod (205) is elastically hinged to the push rod (501), a reducer (502) is provided on the upper side of the push rod (501), a spline sleeve (503) is fixedly installed on the output end of the reducer (502), a spline shaft (504) is elastically slidably installed in the spline sleeve (503), the outer wall of the spline shaft (504) is rotatably sleeved with a sleeve plate (505) that matches the push rod (501), a reel (506) is provided on one side of the spline shaft (504), and a spline groove that matches the spline shaft (504) is opened at one end of the reel (506).

7. The anti-top impact safety bridge crane according to claim 6, characterized in that: The lifting mechanism further comprises an elastic wedge block (601), the elastic wedge block (601) is slidably mounted in the spline sleeve (503), and the outer wall of the spline shaft (504) is provided with a locking groove matched with the elastic wedge block (601).

8. The anti-top impact safety bridge crane according to claim 6, characterized in that: The invention also includes a limiting mechanism, which includes the gear (701). One end of the reel (506) is fixedly sleeved with the gear (701). A hydraulic rod (702) is provided on one side of the gear (701). A rack (703) that matches the gear (701) is fixedly installed on the telescopic end of the hydraulic rod (702).

9. The anti-top impact safety bridge crane according to claim 7, characterized in that: The invention also includes an unlocking mechanism, which includes a ring (801), a ring (801) being rotatably mounted on the spline sleeve (503), the ring (801) being connected to the reducer (502) via a support rod, a groove being provided on the ring (801), a slider (802) being slidably mounted in the groove, an unlocking block (803) being mounted on the top of the slider (802) via an elastic telescopic shaft, the unlocking block (803) being movably connected to the inner wall of the groove of the ring (801), a convex shaft matching the unlocking block (803) being fixedly mounted on one side of the elastic wedge block (601), and a vertical groove for the convex shaft to move is provided through one side of the spline sleeve (503).

10. The anti-top impact safety bridge crane according to claim 9, characterized in that: It also includes a limiting block (901), the limiting block (901) is fixedly installed in the groove of the ring (801), and a slot matching the limiting block (901) is opened on one side of the unlocking block (803).

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