Crane limiting bracket capable of stably limiting

Abstract

The utility model discloses a stable limiting crane limiting support, and relates to the technical field of cranes, the stable limiting crane limiting support comprises a bottom plate, a limiting device is fixedly arranged above a rotating device, the limiting device comprises a base, and the two sides of the top end of the base are jointly and fixedly connected with a supporting frame; two second fixing plates are fixedly connected to the upper portion of one end of the supporting frame, second rotating shafts are rotationally connected to one ends of the opposite faces of the two second fixing plates and the inner walls of the two sides of the supporting frame, the inner walls of the two sides of the supporting frame are jointly and slidably connected with a limiting plate, and two connecting plates are fixedly connected to one end of the limiting plate; one ends of the two connecting plates are jointly and fixedly connected with a lifting hook, the inner walls of the two sides of the lifting hook and the outer surfaces of the two second rotating shafts are movably sleeved with rolling wheels, the lifting height of the lifting hook can be limited, and the position of goods can be effectively controlled when the goods are lifted.

Description

Technical Field

[0001] The present application relates to the technical field of cranes, and in particular to a stable limiting crane bracket. Background Art

[0002] Crane is a commonly used engineering construction equipment used to lift heavy objects and move them to the destination. Electric hoist is an important component of the crane. When the crane is lifting, the hook driven by the electric hoist lifts at a fast speed. In order to prevent the heavy object from hitting the top, the crane is equipped with a lifting height limit device.

[0003] After investigation, the disclosure (announcement) number: CN213445832U discloses a crane limit bracket, which discloses "including a main beam, the lower side wall of the main beam is fixedly connected to two bracket plates, the opposite side walls of the two bracket plates are fixedly connected to a connecting plate, and the side walls of the two connecting plates are commonly fixedly connected to an electric hoist, and the electric hoist consists of an electric hoist body, a chain, and a hook. The chain is wrapped around the electric hoist body, and the lower end of the chain is fixedly connected to the hook. The side wall of the bracket plate at the left end is provided with a limiting mechanism for limiting the lifting height of the hook, etc. The technical solution has the function of limiting the lifting height of the hook by disconnecting the power circuit of the electric hoist body and stopping the electric hoist body from working. There is no need to use a heavy hammer limiting device, which is easy to operate and prevents the pull wire from being wrapped around the chain, ensuring that the device can work normally. The lifting height of the hook can also be adjusted by moving the device plate up and down."

[0004] Regarding the above-mentioned related technologies, the inventor believes that when the hook of the crane on the market is raised to the highest position, the heavy object will hit the top and cause a safety hazard. It is impossible to limit the lifting height of the hook, and the crane cannot effectively control the position of the placed goods when lifting the goods, so it needs to be improved. Utility Model Content

[0005] The purpose of this application is to provide a stable limiting crane limit bracket to improve the problem that the lifting height of the hook cannot be limited and the crane cannot effectively control the position of the placed cargo when lifting the cargo.

[0006] The present application provides a stable and limited crane limit bracket adopting the following technical solutions:

[0007] The lifting mechanism comprises a lifting mechanism, and the lifting mechanism comprises a lifting mechanism, and the lifting mechanism comprises a bottom plate, and a bottom plate, and a lifting mechanism comprises a bottom plate. The lifting mechanism comprises a bottom plate, and a lifting mechanism comprises a bottom plate. The lifting mechanism comprises a bottom plate, and a lifting mechanism comprises a bottom plate. The lifting mechanism comprises a bottom plate, and a lifting mechanism comprises a bottom plate.

[0008] By adopting the above technical solution, the cargo to be lifted is first transported to the bottom of the hook. When the cargo needs to be lifted, the first motor in the limit device is turned on, and the rotation of the first motor drives the first rotating shaft to rotate. The rotation of the first rotating shaft pays out the cable. When the cable pays out, it drives the three rollers to rotate in turn, and the outer surface of the cable slides in the inner walls of the two rollers. Since one end of the cable is fixedly connected to the fixed frame, when the cable pays out more, it drives the lower hook to rotate and move downward, and the hook drives the two connecting plates to move downward, and the two connecting plates jointly drive the limiting plate to move downward, and the downward movement of the limiting plate drives the two sliders to separate Don't slide in the inner wall of the slide. When the hook drops to the position of the cargo, hook the cargo with the hook and start the first motor again. The rotation of the first motor drives the first shaft to rotate. The first shaft will reel in the cable. When reeling in, the cable slides on the outer surface of the three rollers. The bottom end of the fixed frame firmly pulls the cable, and the lower roller slowly rises. The lower roller drives the hook to rise. The rising hook drives the two connecting plates to rise. The rising of the two connecting plates jointly drives the limit plate to rise. The rising limit plate drives the two sliders to rise in the inner wall of the slide, thereby achieving the purpose of limiting the lifting height of the hook.

[0009] Optionally, the rotating device includes a support plate, the bottom end of the support plate is fixedly connected to the top end of the base plate, one end of the support plate is fixedly connected to a support box, the bottom end of the support box is fixedly connected to the top end of the base plate, the inner walls of both sides of the support box are jointly rotated and connected to a worm, one end of the support box is fixedly provided with a second motor, the output end of the second motor passes through one end of the support box and is fixedly connected to one end of the worm, the outer surface of the worm is meshed with a worm wheel, one end of the worm wheel passes through a third rotating shaft, the top end of the third rotating shaft is fixedly connected to a driving gear, the outer surface of the driving gear is meshed with a driven gear, and the top end of the driven gear is fixedly connected to the bottom end of the base.

[0010] By adopting the above technical solution, when the lifted cargo needs to be placed in the position that needs to be controlled, the second motor in the rotating device is turned on, and the output end of the second motor rotates to drive the worm to rotate, the rotation of the worm drives the worm wheel to rotate, the rotation of the worm wheel drives the third rotating shaft to rotate, the rotation of the third rotating shaft drives the driving gear to rotate, the rotation of the driving gear drives the driven gear to rotate, the rotation of the driven gear drives the connecting rod to rotate, the rotation of the driven gear drives the six sliding rods to rotate, the lower part of the outer surface of the six sliding rods rotates in the inner wall of the ring groove, and the rotation of the driven gear drives the base to rotate, thereby achieving the purpose of effectively controlling the position of the placed cargo when the crane lifts the cargo.

[0011] Optionally, both ends of the limit plate are fixedly connected with sliders, and the inner walls on both sides of the support frame are provided with sliding grooves, the outer surface of the slider fits with the inner wall of the sliding groove, and the slider and the sliding groove are both "T" shaped.

[0012] By adopting the above technical solution, since the slider and the slide groove are both in a "T" shape, the slider can stably slide in the inner wall of the slide groove.

[0013] Optionally, one end of the cable is fixedly connected to a fixing frame, and both sides of the top end of the fixing frame are respectively fixedly connected to the bottom end of the second fixing plate.

[0014] By adopting the above technical solution, the bottom end of the fixing frame firmly holds the cable.

[0015] Optionally, the inner walls of the three rollers are in contact with the outer surface of the cable.

[0016] By adopting the above technical solution, the three rollers are driven to rotate in sequence when the cable is released.

[0017] Optionally, the cable is made of alloy carbon steel.

[0018] By adopting the above technical solution, the cable made of alloy carbon steel is more durable.

[0019] Optionally, the bottom end of the driven gear is fixedly connected to a connecting rod, and the bottom end of the connecting rod is rotatably connected to the top end of the support plate.

[0020] By adopting the above technical solution, the rotation of the driven gear drives the connecting rod to rotate.

[0021] Optionally, six slide rods distributed in a ring array are fixedly connected to the bottom end of the driven gear, and a ring groove is provided at the top end of the support plate. The lower parts of the outer surfaces of the six slide rods are in contact with the inner wall of the ring groove.

[0022] By adopting the above technical solution, the rotation of the driven gear drives the six slide bars to rotate, and the lower parts of the outer surfaces of the six slide bars rotate in the inner wall of the annular groove.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The utility model drives the hook to rise through the lower roller, and the rising hook drives the two connecting plates to rise. The rising two connecting plates jointly drive the limit plates to rise. The rising limit plates drive the two sliders to rise in the inner wall of the slide, thereby achieving the purpose of limiting the lifting height of the hook.

[0025] 2. The utility model drives the six slide bars to rotate by the rotation of the driven gear. The lower parts of the outer surfaces of the six slide bars rotate in the inner wall of the ring groove. The rotation of the driven gear drives the base to rotate, thereby achieving the purpose of effectively controlling the placement of the cargo when the crane lifts the cargo. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the utility model.

[0027] Figure 2 It is a schematic diagram of the limiting device of the utility model.

[0028] Figure 3 It is a partial structural diagram of the limiting device of the utility model.

[0029] Figure 4 It is an exploded view of the rotating device of the utility model.

[0030] In the figure, 1, bottom plate; 2, rotating device; 3, limiting device; 201, supporting plate; 202, supporting box; 203, worm; 204, second motor; 205, worm wheel; 206, third rotating shaft; 207, driving gear; 208, driven gear; 209, connecting rod; 210, sliding rod; 211, annular groove; 301, base; 302, first fixed plate; 303, first rotating shaft; 304, first motor; 305, supporting frame; 306, second fixed plate; 307, second rotating shaft; 308, limiting plate; 309, connecting plate; 310, hook; 311, roller; 312, cable; 313, slider; 314, slide groove; 315, fixing frame. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1 -Attached Figure 4 , further details of this application are given.

[0032] Example

[0033] A stable limiting crane bracket includes a base plate 1, a rotating device 2 is fixedly provided on the top of the base plate 1, and a limiting device 3 is fixedly provided above the rotating device 2. The rotating device 2 can enable the crane to effectively control the position of the placed goods when lifting the goods, and the limiting device 3 can limit the lifting height of the hook 310.

[0034] The limiting device 3 includes a base 301, two first fixed plates 302, a first motor 304, a support frame 305, two second fixed plates 306 and a slider 313. The top of the base 301 is connected to the two first fixed plates 302 by welding, and one end of the opposite surfaces of the two first fixed plates 302 are rotatably connected to the first rotating shaft 303. The first motor 304 is located at one end of one of the first fixed plates 302. The output end of the first motor 304 passes through one of the first fixed plates 302 and is engaged with one end of the first rotating shaft 303. The two sides of the top of the base 301 are connected to the two sides of the bottom of the support frame 305 by welding. The upper part of one end of the support frame 305 is connected to the two second fixed plates 306 by welding. The one end of the opposite surface of the two second fixed plates 306 is rotatably connected to the inner walls of both sides of the support frame 305 by second rotating shafts 307.

[0035] The inner walls on both sides of the support frame 305 are slidably connected to the limit plate 308. Both ends of the limit plate 308 are connected to the slider 313 by welding. The inner walls on both sides of the support frame 305 are provided with a slide groove 314. The outer surface of the slider 313 fits with the inner wall of the slide groove 314. The slider 313 and the slide groove 314 are both "T"-shaped. Since the slider 313 and the slide groove 314 are both "T"-shaped, the slider 313 can slide stably in the inner wall of the slide groove 314. One end of the limit plate 308 is welded with two connecting plates 309, and one end of the two connecting plates 309 is welded with a hook 310.

[0036] The inner walls on both sides of the hook 310 and the outer surfaces of the two second rotating shafts 307 are movably connected with rollers 311. The three rollers 311 and the outer surface of the first rotating shaft 303 are jointly wrapped with cables 312. The first rotating shaft 303 rotates to pay out the cable 312. When the cable 312 pays out, the three rollers 311 are driven to rotate in turn. The cable 312 is made of alloy carbon steel. The cable 312 made of alloy carbon steel is more durable. A fixing frame 315 is welded to one end of the cable 312. The top two sides of the fixing frame 315 are respectively connected to the bottom end of the second fixed plate 306 by welding. The bottom end of the fixing frame 315 firmly pulls the cable 312, and the inner walls of the three rollers 311 are in contact with the outer surface of the cable 312.

[0037] The rotating device 2 includes a support plate 201, a support box 202, a second motor 204, a third rotating shaft 206, a driving gear 207, a connecting rod 209 and a sliding rod 210. The bottom end of the support plate 201 is connected to the top of the base plate 1 by welding, one end of the support plate 201 is connected to the support box 202 by welding, the bottom end of the support box 202 is connected to the top of the base plate 1 by welding, and the inner walls on both sides of the support box 202 are connected to the worm 203 for rotating together. The second motor 204 is located at one end of the support box 202, and the output end of the second motor 204 passes through one end of the support box 202 and is connected to one end of the worm 203 by welding. The outer surface of the worm 203 is meshed with a worm wheel 205, and the inner wall of the worm wheel 205 is connected to the outer surface of the third rotating shaft 206 by welding. The rotation of the worm 203 drives the worm wheel 205 to rotate, and the rotation of the worm wheel 205 drives the third rotating shaft 206 to rotate.

[0038] The top end of the third rotating shaft 206 is connected to the bottom end of the driving gear 207 by welding, and the outer surface of the driving gear 207 is meshed with the driven gear 208. The rotation of the driving gear 207 drives the driven gear 208 to rotate. The bottom end of the driven gear 208 is connected to the connecting rod 209 by welding. The bottom end of the connecting rod 209 is rotatably connected to the top end of the support plate 201. The rotation of the driven gear 208 drives the connecting rod 209 to rotate.

[0039] The bottom end of the driven gear 208 is connected to six slide bars 210 distributed in a circular array by welding. A ring groove 211 is provided at the top of the support plate 201. The lower outer surfaces of the six slide bars 210 are all in contact with the inner wall of the ring groove 211. The rotation of the driven gear 208 drives the six slide bars 210 to rotate. The lower outer surfaces of the six slide bars 210 rotate in the inner wall of the ring groove 211. The top end of the driven gear 208 is connected to the bottom end of the base 301 by welding. The rotation of the driven gear 208 drives the base 301 to rotate.

[0040] Working principle: first transport the goods to be lifted to the bottom of the hook 310. When the goods need to be lifted, turn on the first motor 304 in the limit device 3. The rotation of the first motor 304 drives the first shaft 303 to rotate. The rotation of the first shaft 303 pays off the cable 312. When the cable 312 pays off the line, it drives the three rollers 311 to rotate in turn. The outer surface of the cable 312 slides in the inner wall of the two rollers 311. Since one end of the cable 312 is fixedly connected to the fixing frame 315, when the cable 312 pays off more line, it drives the lower hook 310 to rotate and move downward. The hook 310 drives the two connecting plates 309 to move downward. The two connecting plates 309 jointly drive the limiting plate 308 to move downward. The limiting plate 308 moves downward and drives the two sliders 313 to slide in the chute 314 respectively. When the lifting hook 310 is lowered to the position of the cargo, the cargo is hooked with the hook 310 and the first motor 304 is turned on again. The rotation of the first motor 304 drives the first shaft 303 to rotate, and the first shaft 303 will reel in the cable 312. During the reeling in, the cable 312 slides on the outer surface of the three rollers 311. The bottom end of the fixing frame 315 firmly pulls the cable 312, and the lower roller 311 slowly rises. The lower roller 311 drives the hook 310 to rise. The rising of the hook 310 drives the two connecting plates 309 to rise. The rising of the two connecting plates 309 jointly drives the limiting plate 308 to rise. The rising of the limiting plate 308 drives the two sliders 313 to rise in the inner wall of the slide groove 314, thereby achieving the purpose of limiting the lifting height of the hook 310.

[0041] When the lifted cargo needs to be placed at a position that needs to be controlled, the second motor 204 in the rotating device 2 is turned on, and the output end of the second motor 204 rotates to drive the worm 203 to rotate, and the rotation of the worm 203 drives the worm wheel 205 to rotate, and the rotation of the worm wheel 205 drives the third rotating shaft 206 to rotate, and the rotation of the third rotating shaft 206 drives the driving gear 207 to rotate, and the rotation of the driving gear 207 drives the driven gear 208 to rotate, and the rotation of the driven gear 208 drives the connecting rod 209 to rotate, and the rotation of the driven gear 208 drives the six sliding rods 210 to rotate, and the lower part of the outer surface of the six sliding rods 210 rotates in the inner wall of the annular groove 211, and the rotation of the driven gear 208 drives the base 301 to rotate, thereby achieving the purpose of effectively controlling the position of the placed cargo when the crane lifts the cargo.

[0042] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A stable limited crane limit bracket, comprising a bottom plate (1), characterized in that: A rotating device (2) is fixedly provided on the top of the bottom plate (1), and a limiting device (3) is fixedly provided above the rotating device (2); The limiting device (3) comprises a base (301), the top of the base (301) is fixedly connected to two first fixing plates (302), one end of the opposite surfaces of the two first fixing plates (302) are jointly rotatably connected to a first rotating shaft (303), one end of one of the first fixing plates (302) is fixedly connected to a first motor (304), the output end of the first motor (304) passes through one of the first fixing plates (302) and is fixedly connected to one end of the first rotating shaft (303), and both sides of the top of the base (301) are jointly fixedly connected to a support frame (305), and the upper part of one end of the support frame (305) is fixedly connected to two second fixing plates. (306), one end of the opposite surface of the two second fixed plates (306) and the inner walls on both sides of the support frame (305) are rotatably connected to the second rotating shaft (307), the inner walls on both sides of the support frame (305) are slidably connected to the limiting plate (308), one end of the limiting plate (308) is fixedly connected to two connecting plates (309), one end of the two connecting plates (309) is fixedly connected to a hook (310), the inner walls on both sides of the hook (310) and the outer surfaces of the two second rotating shafts (307) are movably connected with rollers (311), and the three rollers (311) and the outer surface of the first rotating shaft (303) are commonly wound with a cable (312).

2. The stable position-limiting crane limit bracket according to claim 1, characterized in that: The rotating device (2) comprises a support plate (201), the bottom end of the support plate (201) is fixedly connected to the top end of the base plate (1), one end of the support plate (201) is fixedly connected to a support box (202), the bottom end of the support box (202) is fixedly connected to the top end of the base plate (1), both sides of the inner wall of the support box (202) are connected to a worm (203) for common rotation, one end of the support box (202) is fixedly provided with a second motor (204), the output of the second motor (204) The end of the support box (202) passes through one end of the support box (202) and is fixedly connected to one end of the worm (203); the outer surface of the worm (203) is meshedly connected to a worm wheel (205); one end of the worm wheel (205) passes through and is connected to a third rotating shaft (206); the top end of the third rotating shaft (206) is fixedly connected to a driving gear (207); the outer surface of the driving gear (207) is meshedly connected to a driven gear (208); the top end of the driven gear (208) is fixedly connected to the bottom end of the base (301).

3. The stable position-limiting crane bracket according to claim 1, characterized in that: Both ends of the limit plate (308) are fixedly connected with sliders (313), and the inner walls of both sides of the support frame (305) are provided with sliding grooves (314). The outer surface of the slider (313) is in contact with the inner wall of the sliding groove (314), and the slider (313) and the sliding groove (314) are both "T"-shaped.

4. The stable position-limiting crane bracket according to claim 1, characterized in that: One end of the cable (312) is fixedly connected to a fixing frame (315), and both sides of the top end of the fixing frame (315) are respectively fixedly connected to the bottom end of the second fixing plate (306).

5. The stable position-limiting crane bracket according to claim 1, characterized in that: The inner walls of the three rollers (311) are all in contact with the outer surface of the cable (312).

6. The stable position-limiting crane bracket according to claim 1, characterized in that: The cable (312) is made of alloy carbon steel.

7. The stable position-limiting crane bracket according to claim 2, characterized in that: The bottom end of the driven gear (208) is fixedly connected to a connecting rod (209), and the bottom end of the connecting rod (209) is rotatably connected to the top end of the support plate (201).

8. The stable position-limiting crane bracket according to claim 2, characterized in that: The bottom end of the driven gear (208) is fixedly connected to six slide bars (210) distributed in a ring array, and the top end of the support plate (201) is provided with a ring groove (211), and the lower parts of the outer surfaces of the six slide bars (210) are all in contact with the inner wall of the ring groove (211).

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