Buffer type crane rigid body sliding contact line protection device
By designing sleeves, movable rods, racks, and tooth meshing structures on the rigid conductor rail of the crane, combined with springs and screws, the deformation problem caused by thermal expansion and contraction of the conductor rail is solved, achieving precise adjustment and buffering effects, improving the robustness and safety of the device, and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-15
- Publication Date
- 2026-04-07
AI Technical Summary
Existing rigid conductor rails of cranes are prone to deformation due to thermal expansion and contraction during use and maintenance, which can cause changes in the distance between the protective frame and the conductor rail, affecting operational safety and lifting range. Furthermore, existing protective devices are not precisely adjusted and are prone to deformation, concave friction, and short circuits.
Design a buffer-type rigid contact line protection device for cranes, which adopts a sleeve, movable rod, rack and tooth meshing structure, combined with spring and screw, to achieve precise adjustment and buffering function of the insulating protective plate and prevent deformation and indentation.
It enables precise positioning adjustment of the insulating protective plate, improves the robustness and buffering effect of the device, prevents short circuits in the sliding contact line, reduces the need for power outage maintenance, and lowers maintenance costs.
Smart Images
Figure CN224091512U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the protection technical field of crane rigid body slide contact line, especially relates to a buffer crane rigid body slide contact line protection device. BACKGROUND
[0002] The slide contact line is a group of power transmission devices for supplying power to the crane. It mainly includes commonly used slide contact lines such as single-pole aluminum slide contact line, single-pole copper slide contact line, steel body slide contact line, multi-pole tube slide contact line, jointless slide contact line and copper contact line. The bridge crane of a metallurgical enterprise basically adopts rigid body slide contact line for power supply. The rigid body slide contact line belongs to non-safety slide contact line. In order to ensure the safe operation of the bridge crane, a rigid body slide contact line protection frame is installed at the side end beam of the rigid body slide contact line to prevent the swinging of the steel wire rope of the lifting hook or the collision of the lifting hook with the rigid body slide contact line, which may cause short circuit or grounding of the rigid body slide contact line.
[0003] The current crane steel body slide contact line has the following problems in use and maintenance:
[0004] 1. The slide contact line is easily deformed due to thermal expansion and cold contraction. After deformation, the safety distance of the rigid body slide contact line from the protection frame changes. When it is summer, the distance from the protection frame is small, and the protection frame may touch the rigid body slide contact line during operation.
[0005] 2. After the safety distance between the protection frame and the rigid body slide contact line is enlarged, the effective distance of the trolley of the bridge crane is affected, the lifting range is affected, and the increase of 100mm affects the entire 20m 2 range. These ranges need to be lifted by a lifting machine such as a truck crane, which increases the cost.
[0006] 3. The protection frame is deformed after collision, and the entire protection frame needs to be removed for repair. The rigid body slide contact line needs to be powered off for a long time, which wastes manpower and resources.
[0007] Therefore, an adjustable protection device is designed. However, the impact surface of the protection plate of the device is rigid and is easily deformed and concave. After concave, the rigid body slide contact line is touched and friction is generated, which may damage the insulation layer and cause short circuit. Moreover, the adjustment interval is controlled by a plurality of through holes. If the through holes are too many, the device is not firm enough. If the through holes are too few, the interval of the through holes will inevitably be large, and the position of the protection plate cannot be adjusted according to the actual situation. SUMMARY
[0008] The utility model discloses a buffer crane rigid body slide contact line protection device to solve the problems in the prior art.
[0009] The utility model discloses a buffer crane rigid body slide contact line protection device to solve the problems in the prior art.
[0010] The utility model relates to a buffer type crane rigid body slide contact line protection device, including end beam, two sleeves are welded on the end beam, the movable rod is inserted in the sleeve, the movable rod is welded with the connecting rod in common, at least two screw rods are inserted on the connecting rod, the spring is sleeved on the screw rod, the screw rod is welded with the protection rod in common, the insulating protection plate is welded on the protection rod, the pressing plate is bolted on the sleeve, the rack is welded at the bottom end of the pressing plate, a plurality of teeth are formed on the movable rod, and the rack is meshed with the teeth after penetrating the sleeve.
[0011] Further, the sleeve is square and has a square inner cavity, a strip-shaped hole is formed at the top end of the sleeve, and the sleeve is open at the end away from the end beam.
[0012] Further, the movable rod is matched with the square inner cavity of the sleeve, and the teeth are located at the top end of the movable rod.
[0013] Further, the two ends of the pressing plate above the strip-shaped hole are bolted with the ear plates after the pressing plate is pressed above the strip-shaped hole, and the rack is meshed with the teeth after penetrating the strip-shaped hole.
[0014] Further, the screw rod is threaded with two fixed nuts after penetrating the protection rod at one end, and the spring is located on the screw rod between the protection rod and the insulating protection plate.
[0015] Further, the insulating protection plate is in a circular arc shape, and the outer convex surface of the circular arc structure of the insulating protection plate faces outward.
[0016] The utility model has the following beneficial effects:
[0017] 1. The utility model can absorb the impact force of the impact of hooks and the like, thereby playing a buffering role, and the position of the insulating protection plate can be adjusted as required, thereby making the position of the insulating protection plate more accurate.
[0018] 2. The position of the movable rod is fixed through the meshing of the rack and the teeth, and compared with the prior art, the adjustment accuracy is higher, and the firmness is better.
[0019] 3. The impact surface of the insulating protection plate is in a circular arc shape and is not prone to deformation and concave, thereby preventing short circuit caused by friction with the slide contact line after deformation and concave.
[0020] 4. The spring and the screw rod are used for buffering and absorbing the impact force of the impact of hooks and the like, thereby further preventing the deformation and concave of the insulating protection plate. DRAWINGS
[0021] Fig. 1 is a side view structural schematic diagram of the utility model.
[0022] Fig. 2 is a three-dimensional structural schematic diagram of the utility model.
[0023] Fig. 3 is a disassembled structural schematic diagram of the utility model.
[0024] Among them: 1. End beam; 2. Sleeve; 3. Movable rod; 4. Connecting rod; 5. Screw; 6. Spring; 7. Protective rod; 8. Insulating protective plate; 9. Pressure plate; 10. Rack; 11. Tooth; 12. Strip hole; 13. Ear plate; 14. Fixing nut; 15. Rigid sliding contact line. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the scope of the utility model.
[0026] like Figs. 1-3 As shown, a buffer-type rigid body sliding contact line protection device for a crane includes an end beam 1, two sleeves 2 welded on the end beam 1, movable rods 3 inserted into the sleeves 2, a connecting rod 4 welded together to the two movable rods 3, at least two screws 5 passing through the connecting rod 4, springs 6 sleeved on the screws 5, a protective rod 7 welded together to the screws 5, an insulating protective plate 8 welded to the protective rod 7, a pressure plate 9 bolted to the sleeve 2, a rack 10 welded to the bottom end of the pressure plate 9, and a plurality of teeth 11 provided on the movable rods 3, the rack 10 engaging with the teeth 11 after passing through the sleeve 2.
[0027] The sleeve 2 is square and has a square inner cavity. A strip hole 12 is opened at the top of the sleeve 2. The end of the sleeve 2 away from the end beam 1 is open. Ear plates 13 are welded on both sides of the sleeve 2 at the position of the strip hole 12.
[0028] The movable rod 3 is matched with the square inner cavity shape of the sleeve 2, and the tooth 11 is located at the top of the movable rod 3.
[0029] After the pressure plate 9 is pressed above the strip hole 12, both ends are bolted to the ear plate 13. The rack 10 passes through the strip hole 12 and engages with the tooth 11.
[0030] One end of the screw 5 passes through the protective rod 7 and is threaded with two rigid sliding contact lines 1514. The spring 6 is located on the screw 5 between the protective rod 7 and the insulating protective plate 8.
[0031] The insulating protective plate 8 is arc-shaped, with the convex surface of the arc structure of the insulating protective plate 8 facing outward.
[0032] The working principle of this utility model is as follows:
[0033] In use, the sleeve 2 is welded to the side wall of the crane end beam 1, and the two movable rods 3 are inserted into the sleeve 2. The position of the insulating protective plate 8 is adjusted so that it is about 200mm away from the rigid sliding contact line. Then, the rack 10 is inserted into the strip hole 12 and meshes with the teeth 11, and is bolted to the ear plate 13 by the pressure plate 9. When the crane trolley is running, this utility model moves with its end beam 1, thereby preventing the hook from touching the sliding contact line. When the hook swings or the wire rope or the hook swings, it hits the insulating protective plate 8, and the spring 6 is compressed, thereby absorbing part of the impact force for buffering. Moreover, the impact surface of the insulating protective plate 8 is arc-shaped, and unless subjected to a huge impact force, the impact within the normal range will not cause the insulating protective plate 8 to deform inward. After the insulating protective plate 8 is impacted, the spring 6 returns it to its original position.
[0034] When the sliding contact line expands and contracts due to heat in winter or summer, causing changes in the distance between the sliding contact line and the insulating protective plate 8, remove the pressure plate 9, move the movable rod 3 as needed, so that the position of the insulating protective plate 8 is about 200mm away from the rigid sliding contact line, and then insert the rack 10 into the strip hole 12 again to engage with the teeth 11, and then fasten it to the ear plate 13 through the pressure plate 9.
[0035] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention.
[0036] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.
Claims
1. A buffer-type rigid body sliding contact line protection device for cranes, characterized in that, The device includes an end beam, on which two sleeves are welded. A movable rod is inserted into each sleeve, and a connecting rod is welded to both movable rods. At least two screws are threaded through the connecting rod, and springs are sleeved on the screws. A protective rod is welded to the screws, and an insulating protective plate is welded to the protective rod. A pressure plate is bolted to the sleeve, and a rack is welded to the bottom of the pressure plate. Several teeth are provided on the movable rod, and the rack engages with the teeth after passing through the sleeve.
2. The buffer-type rigid conductor rail protection device for cranes according to claim 1, characterized in that, The sleeve is square and has a square inner cavity. A strip hole is opened at the top of the sleeve. The end of the sleeve away from the end beam is open. Ear plates are welded on both sides of the sleeve at the position of the strip hole.
3. The buffer-type rigid body sliding contact line protection device for cranes according to claim 2, characterized in that, The movable rod is fitted with the square inner cavity shape of the sleeve, and the teeth are located at the top of the movable rod.
4. The buffer-type rigid body sliding contact line protection device for cranes according to claim 2, characterized in that, After the pressure plate presses down above the strip hole, its two ends are bolted to the ear plate, and the rack passes through the strip hole and engages with the teeth.
5. The buffer-type rigid body sliding contact line protection device for cranes according to claim 1, characterized in that, One end of the screw passes through the protective rod and is threaded with two fixing nuts. The spring is located on the screw between the protective rod and the insulating protective plate.
6. The buffer-type rigid body sliding contact line protection device for cranes according to claim 1, characterized in that, The insulating protective plate is arc-shaped, with the convex surface of the arc structure facing outwards.