A stable double-beam bridge crane

Abstract

The utility model provides a kind of stable double-beam bridge crane, it is related to double-beam bridge crane field, and it includes: double main girder, the both ends of double main girder are connected with end beam, buffer is installed in the inner side wall of end beam, the upper end of double main girder is equipped with gear slot, the end of gear slot is equipped with range sensor, the upper end of double main girder is movably connected with electric hoist, electric hoist includes winch box, the downside of winch box is connected with drive box, winch motor is simultaneously installed on the outer wall of winch box, walking motor is installed on the outer wall of drive box, the output shaft end of winch motor is connected with winding drum, and steel wire sling is wound on the outside of winding drum, and the lower end of steel wire sling is connected with hook, and the outside of steel wire sling is equipped with guide assembly. The utility model has the effect that slow braking prevents hook swing, and has the dust removal lubrication maintenance effect to steel wire sling simultaneously.

Description

Technical Field

[0001] This utility model relates to the technical field of double-girder bridge cranes, specifically to a stable double-girder bridge crane. Background Technology

[0002] Double-girder bridge cranes mainly consist of a bridge frame, a trolley traveling mechanism, a trolley, and electrical equipment. Based on usage frequency, they are classified into three working levels: A5, A6, and A7. During operation, double-girder bridge cranes work by directly mounting corresponding electric hoists on the double main beams. To prevent collisions when the electric hoists reach the ends of the bridge frame, buffers are frequently used; these buffers are elastic devices for load reduction and unloading. A search revealed existing technology (publication number: CN221876410U), which describes "a stable double-girder bridge crane that effectively solves the problem of poor buffering effect. It includes double main beams, with end beams fixed at both ends. An electric hoist is movably connected to the double main beams. A buffer device is installed on the end beams. The buffer device includes a support block, an arc-shaped baffle between the support block and the electric hoist, and multiple first springs installed between the support block and the arc-shaped baffle. Multiple guide rods are fixed on the support block, and the guide rods slide left and right within the end beams. Second springs are sleeved on the guide rods and located between the end beams and the support block. The support block is an isosceles trapezoidal block, with positioning blocks on both the upper and lower sides. A sliding groove is provided within the positioning block, and a bracket is slidably connected within the sliding groove. A roller that abuts against the support block is rotatably connected to the bracket. A pressure sensor is installed within the positioning block and located within the sliding groove. A third spring is installed between the pressure sensor and the bracket."

[0003] Although the stable double-girder bridge crane mentioned in the aforementioned patent documents achieves a stable buffering effect, during use, the device still generates a reverse force when the electric hoist moves quickly to the end and contacts it, causing the wire rope to swing. Although it achieves buffering, it cannot reduce the swing of the wire rope. However, when the wire rope moves unloaded (the hook has no load), it is easy to cause the hook to swing, which poses a safety hazard. Secondly, the wire rope involved lacks a dust removal and lubrication device, and regular manual maintenance is quite troublesome. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, a stable double-girder bridge crane is provided to solve the problems mentioned in the background.

[0005] To achieve the above objectives, a stable double-girder bridge crane is provided, comprising: double main beams, with end beams connected to both ends of the double main beams, buffers installed on the inner sidewalls of the end beams, toothed grooves formed at the upper ends of the double main beams, and distance sensors installed at the ends of the toothed grooves; an electric hoist is movably connected to the upper ends of the double main beams, the electric hoist including a winch housing, a drive box connected to the lower side of the winch housing, a winch motor installed on the outer wall of the winch housing, a travel motor installed on the outer wall of the drive box, a drum connected to the output shaft end of the winch motor, and a wire rope wound around the outer side of the drum, with a hook connected to the lower end of the wire rope; and the wire rope... A guide assembly is provided on the outer side of the hoisting rope. The output shaft of the walking motor is connected to a drive shaft, and a walking gear is connected to the outer side of the drive shaft. The walking gear is meshed in the tooth groove. A brake assembly is connected to the end of the drive shaft away from the walking motor. The brake assembly includes a brake disc installed on the outer side of the drive shaft. Fixed brake pads and movable brake pads are respectively provided on both sides of the brake disc. An electro-hydraulic actuator is connected to the outer side of the movable brake pad. The guide assembly includes a guide cylinder, and a maintenance ring is connected to the lower end of the guide cylinder through a connecting rod. An oil reservoir is provided inside the maintenance ring, and bristles are provided on the inner wall of the maintenance ring. The steel wire hoisting rope passes through the guide cylinder and the maintenance ring.

[0006] Furthermore, the drum is rotatably connected inside the winch housing, and a through hole is provided between the winch housing and the drive housing.

[0007] Furthermore, a horizontal fixing rod is connected to the inner wall of the through hole, and the outer wall of the guide cylinder is connected to the end of the fixing rod.

[0008] Furthermore, the drive shaft has two parallel shafts, and sprockets are mounted on the outer wall of the drive shaft, with chains connecting the sprockets.

[0009] Furthermore, the fixed brake pad is fixed to the outer wall of the drive box, and a guide rod is connected to the outer side of the fixed brake pad. The outer end of the guide rod is connected to a mounting plate, and the guide rod slides through the moving brake pad.

[0010] Furthermore, the electro-hydraulic actuator is horizontally fixed to the outside of the mounting plate, and the telescopic rod end of the electro-hydraulic actuator is connected to the middle of the dynamic brake pad.

[0011] Furthermore, the outer wall of the maintenance ring is provided with an oil injection hole communicating with the oil storage cavity, and the inner wall of the maintenance ring is provided with a seepage hole communicating with the oil storage cavity.

[0012] Furthermore, a controller is provided on the outer wall of the winch housing, and the distance sensor is electrically connected to the electro-hydraulic actuator through the controller.

[0013] Furthermore, the front and rear outer walls of the double main beams are provided with guide grooves, and guide blocks are slidably connected in the guide grooves, and the guide blocks are connected to the bottom of both ends of the drive box.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. During use, when the electric hoist moves along the double main beams and approaches the end beam, the travel gear is detected by the distance sensor. Then, the controller controls the electro-hydraulic actuator, which slowly pushes the moving brake pads toward the stationary brake pads, achieving a clamping braking effect on the brake disc. Since the pushing speed of the electro-hydraulic actuator is controllable, a slow braking effect can be achieved, thus avoiding direct contact with the buffer that could cause the wire rope and hook to swing. This increases the stability of the crane movement and reduces safety hazards.

[0016] 2. The guide assembly, including the guide cylinder, connecting rod, and maintenance ring, extends the winding guidance of the wire rope and suppresses swaying at its upper end. Simultaneously, during the up-and-down sliding of the wire rope, the lubricating oil flowing out through the oil reservoir inside the maintenance ring, via the seepage holes and bristles, coats the wire rope with the brush, achieving dust removal and lubrication. This provides dust removal, lubrication, and maintenance for the wire rope during use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0018] Figure 2 This is a top view of one end of the double main beam structure according to an embodiment of the present invention.

[0019] Figure 3 This is a cross-sectional structural diagram of the electric hoist according to an embodiment of the present utility model.

[0020] Figure 4 This is a bottom view of the drive box structure according to an embodiment of the present invention.

[0021] Figure 5 This is an embodiment of the present utility model. Figure 3 Enlarged structural diagram at point A in the middle.

[0022] Figure 6 This is an embodiment of the present utility model. Figure 4 Enlarged structural diagram at point B.

[0023] Figure 7 This is a schematic diagram of the guide component structure according to an embodiment of the present utility model.

[0024] In the diagram: 1. Double main beam; 11. End beam; 12. Buffer; 13. Tooth groove; 14. Distance sensor; 2. Electric hoist; 21. Winch housing; 211. Drum; 212. Winch motor; 213. Wire rope; 214. Hook; 22. Drive box; 23. Travel motor; 231. Chain; 232. Sprocket; 233. Drive shaft; 234. Through hole; 24. Travel gear; 25. Guide assembly; 251. Guide cylinder; 252. Connecting rod; 253. Maintenance ring; 2531. Oil reservoir; 2532. Seepage hole; 2533. Brush bristles; 3. Brake assembly; 31. Brake disc; 32. Fixed brake pad; 33. Moving brake pad; 34. Guide rod; 35. Mounting plate; 36. Electro-hydraulic actuator. Detailed Implementation

[0025] Reference Figures 1 to 7 As shown, this utility model provides a stable double-girder bridge crane, including: a double main girder 1, with end beams 11 connected to both ends of the double main girder 1, buffers 12 installed on the inner sidewalls of the end beams 11, a toothed groove 13 opened at the upper end of the double main girder 1, a distance sensor 14 provided at the end of the toothed groove 13, an electric hoist 2 movably connected to the upper end of the double main girder 1, the electric hoist 2 including a winch housing 21, a drive box 22 connected to the lower side of the winch housing 21, a winch motor 212 installed on the outer wall of the winch housing 21, a travel motor 23 installed on the outer wall of the drive box 22, a drum 211 connected to the output shaft end of the winch motor 212, a wire rope 213 wound around the outer side of the drum 211, a hook 214 connected to the lower end of the wire rope 213, a guide assembly 25 provided on the outer side of the wire rope 213, and a drive shaft 233 connected to the output shaft end of the travel motor 23. A travel gear 24 is connected to the outer side of drive shaft 233, and the travel gear 24 is meshed in the tooth groove 13. A brake assembly 3 is connected to the end of drive shaft 233 away from travel motor 23. The brake assembly 3 includes a brake disc 31 installed on the outer side of drive shaft 233, and fixed brake pads 32 and moving brake pads 33 are respectively provided on both sides of brake disc 31. At the same time, an electro-hydraulic push rod 36 is connected to the outer side of moving brake pad 33. The guide assembly 25 includes a guide cylinder 251, and a maintenance ring 253 is connected to the lower end of guide cylinder 251 through connecting rod 252. An oil storage chamber 2531 is provided inside the maintenance ring 253, and bristles 2533 are provided on the inner wall of maintenance ring 253. At the same time, a steel wire rope 213 passes through guide cylinder 251 and maintenance ring 253. An oil injection hole communicating with oil storage chamber 2531 is opened on the outer wall of maintenance ring 253, and a seepage hole 2532 communicating with oil storage chamber 2531 is opened on the inner wall of maintenance ring 253.

[0026] In this embodiment, the double main beam 1, end beam 11 and buffer 12 have been fully disclosed in the prior art, and the operation and lifting of the crane are controlled by a cable remote control.

[0027] Specifically, the oil filling hole is equipped with a sealing plug, and the sealing plug has a vent hole, which allows the lubricating oil to flow from the seepage hole 2532 to the inner wall of the maintenance ring 253 through the external atmospheric pressure, and then adhere to the bristles 2533 to achieve contact with the steel wire rope 213.

[0028] like Figure 3 and Figure 4 In the process, the drum 211 is rotatably connected inside the winch housing 21, and a through hole 234 is provided between the winch housing 21 and the drive housing 22. A horizontal fixed rod is connected to the inner wall of the through hole 234, and the outer wall of the guide cylinder 251 is connected to the end of the fixed rod. The drive shaft 233 has two parallel shafts, and a sprocket 232 is installed on the outer wall of the drive shaft 233. A chain 231 is connected between the sprockets 232.

[0029] Specifically, the sprocket 232 and chain 231 simultaneously drive the two drive shafts 233 to rotate the travel gear 24, which in turn cooperates with the tooth groove 13 to move the electric hoist 2 on the double main beam 1.

[0030] like Figure 1 , Figure 3 , Figure 4 and Figure 6 In the drive box 22, the fixed brake pad 32 is fixed to the outer wall of the drive box 22, and the outer side of the fixed brake pad 32 is connected to the guide rod 34. The outer end of the guide rod 34 is connected to the mounting plate 35. At the same time, the guide rod 34 slides through the moving brake pad 33. The electro-hydraulic push rod 36 is horizontally fixed to the outer side of the mounting plate 35, and the telescopic rod end of the electro-hydraulic push rod 36 is connected to the middle of the moving brake pad 33. The outer wall of the winch box 21 is equipped with a controller, and the distance sensor 14 is electrically connected to the electro-hydraulic push rod 36 through the controller. The front and rear outer walls of the double main beam 1 are provided with guide grooves, and guide blocks are slidably connected in the guide grooves. The guide blocks are connected to the bottom of both ends of the drive box 22.

[0031] Specifically, the cooperation between the guide groove and the guide block enables the walking gear 24 to move stably in the tooth groove 13, preventing deviation.

[0032] Specifically, the moving brake pads 33 are located on the outer side of both brake discs 31 and are considered as an integral structure, so that under the drive of the electro-hydraulic push rod 36 and guided by the guide rod 34, the two brake discs 31 can achieve a synchronous braking effect.

[0033] During operation, as the electric hoist moves along the double main beams, upon approaching the end beam, the travel gear is detected by a distance sensor. The controller then activates the electro-hydraulic actuator included in the braking assembly. This actuator slowly pushes the moving brake pads towards the stationary brake pads, achieving a clamping braking effect on the brake disc. Because the pushing speed of the electro-hydraulic actuator is controllable, a slow braking effect is achieved, preventing direct contact with the buffer and thus avoiding swaying of the wire rope and hook. This increases the stability of the crane's movement and reduces safety hazards. The guide assembly, including the guide cylinder, connecting rod, and maintenance ring, extends the winding guidance of the wire rope and suppresses swaying at its upper end. Simultaneously, during the up-and-down sliding of the wire rope, the lubricating oil flowing out through the oil reservoir in the maintenance ring, via seepage holes and bristles, coats the wire rope with the oil, achieving dust removal and lubrication. This provides dust removal, lubrication, and maintenance for the wire rope during use.

[0034] The stable double-girder bridge crane of this invention can effectively solve the problems mentioned in the background technology. It achieves the effect of slow braking to prevent hook swing on the basis of existing stable double-girder bridge crane technology, and at the same time has the effect of dust removal, lubrication and maintenance of wire rope.

Claims

1. A stable double-girder bridge crane, comprising: The double main beam (1) has end beams (11) connected to both ends of the double main beam (1), and buffers (12) are installed on the inner sidewalls of the end beams (11). The double main beam (1) has a toothed groove (13) at its upper end, and a distance measuring sensor (14) is provided at the end of the toothed groove (13). An electric hoist (2) is movably connected to the upper end of the double main beam (1). The electric hoist (2) includes a winch housing (21), and a drive box (22) is connected to the lower side of the winch housing (21). Meanwhile, a hoisting motor (212) is installed on the outer wall of the hoisting machine housing (21), and a travel motor (23) is installed on the outer wall of the drive housing (22). The output shaft end of the hoisting motor (212) is connected to a drum (211), and a steel wire rope (213) is wound around the outside of the drum (211). A hook (214) is connected to the lower end of the steel wire rope (213), and a guide assembly (25) is provided on the outside of the steel wire rope (213). The output shaft end of the travel motor (23) is connected to a drive shaft (233), and a travel gear (24) is connected to the outside of the drive shaft (233). The travel gear (24) is meshed in the tooth groove (13). A brake assembly (3) is connected to the end of the drive shaft (233) away from the travel motor (23). The brake assembly (3) includes a brake disc (31) installed on the outside of the drive shaft (233), and fixed brake pads (32) and moving brake pads are respectively provided on both sides of the brake disc (31). (33), and an electro-hydraulic push rod (36) is connected to the outside of the brake pad (33). The guide assembly (25) includes a guide cylinder (251), and the lower end of the guide cylinder (251) is connected to a maintenance ring (253) through a connecting rod (252). The maintenance ring (253) has an oil storage chamber (2531) inside, and the inner wall of the maintenance ring (253) is provided with bristles (2533). At the same time, the steel wire rope (213) passes through the guide cylinder (251) and the maintenance ring (253).

2. A stable double-girder bridge crane according to claim 1, characterized in that, The drum (211) is rotatably connected inside the winch housing (21), and a through hole (234) is provided between the winch housing (21) and the drive housing (22).

3. A stable double-girder bridge crane according to claim 2, characterized in that, The inner wall of the through hole (234) is connected to a horizontal fixing rod, and the outer wall of the guide cylinder (251) is connected to the end of the fixing rod.

4. A stable double-girder bridge crane according to claim 1, characterized in that, The drive shaft (233) has two parallel shafts, and a sprocket (232) is installed on the outer wall of the drive shaft (233), and a chain (231) is connected between the sprockets (232).

5. A stable double-girder bridge crane according to claim 1, characterized in that, The fixed brake pad (32) is fixed to the outer wall of the drive box (22), and a guide rod (34) is connected to the outer side of the fixed brake pad (32), and a mounting plate (35) is connected to the outer end of the guide rod (34). At the same time, the guide rod (34) slides through the moving brake pad (33).

6. A stable double-girder bridge crane according to claim 1, characterized in that, The electro-hydraulic actuator (36) is horizontally fixed on the outside of the mounting plate (35), and the telescopic rod end of the electro-hydraulic actuator (36) is connected to the middle of the dynamic brake pad (33).

7. A stable double-girder bridge crane according to claim 1, characterized in that, The outer wall of the maintenance ring (253) is provided with an oil injection hole that communicates with the oil storage cavity (2531), and the inner wall of the maintenance ring (253) is provided with a seepage hole (2532) that communicates with the oil storage cavity (2531).

8. A stable double-girder bridge crane according to claim 1, characterized in that, The winch housing (21) is equipped with a controller on its outer wall, and the distance sensor (14) is electrically connected to the electro-hydraulic actuator (36) through the controller.

9. A stable double-girder bridge crane according to claim 1, characterized in that, The front and rear outer walls of the double main beam (1) are provided with guide grooves, and guide blocks are slidably connected in the guide grooves, and the guide blocks are connected to the bottom of both ends of the drive box (22).

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