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CN-224233108-U - Grounding device for crane boom

CN224233108UCN 224233108 UCN224233108 UCN 224233108UCN-224233108-U

Abstract

The grounding device for the crane boom comprises a base, a carbon brush, a fixing sheet and a spring coil, wherein the carbon brush, the fixing sheet and the spring coil are arranged in the base, the upper portion of the fixing sheet is connected with the base, the spring coil is arranged at the bottom of the fixing sheet and used for pushing the carbon brush to be clung to two sections of arm guide rails of the crane, the base comprises a fixed bottom plate, a carbon brush connecting portion and a carbon brush sliding positioning portion, a convex groove formed by two square grooves is arranged in the carbon brush sliding positioning portion, the two square grooves are carbon brush sliding through grooves used for sliding the carbon brush and stretching the spring coil and fixing sheet clamping grooves used for limiting the fixing sheet respectively, and the upper end face of the carbon brush is an inclined surface matched with the spring coil. The device has the advantages that the structure is simple, the manufacturing is convenient, when the two sections of arms of the crane are telescopic, the spring coil always pushes the carbon brush to be clung to the two sections of arm guide rails downwards along the carbon brush sliding positioning part, continuous conduction between the basic arm of the vehicle body and the two sections of arm guide rails is ensured, the telescopic and swinging of the self-adaptive suspension arm can be realized, meanwhile, the vibration is buffered, and the grounding continuity is ensured.

Inventors

  • ZHANG WEI
  • HE JUNJIE
  • LIU GUOYOU
  • WANG XING
  • ZHU LINLI
  • Chen Chuiyang
  • LIU JINJIAN
  • ZHENG HANBIN
  • YU JUNYI
  • CHEN YAO

Assignees

  • 金鹰重型工程机械股份有限公司

Dates

Publication Date
20260512
Application Date
20250416

Claims (10)

  1. 1. A grounding device for a crane boom is characterized by comprising a base (5), carbon brushes (6) arranged in the base (5), fixing plates (11) and spring rolls (10), wherein the carbon brushes (6) are connected with the base (5) through wires, the upper parts of the fixing plates (11) are directly or indirectly connected with the base (5), spring rolls (10) used for pushing the carbon brushes (6) to enable the carbon brushes (6) to be tightly attached to two-section arm guide rails of the crane are tangentially arranged at the bottoms of the fixing plates (11), the base (5) comprises a middle fixing bottom plate (4), carbon brush connecting parts (17) arranged at the upper parts of the fixing bottom plate (4) and carbon brush sliding positioning parts (16) arranged at the lower parts of the fixing bottom plate (4), the carbon brush connecting parts (17) are communicated with the inside of the carbon brush sliding positioning parts (16), convex grooves formed by two square grooves are respectively arranged in the carbon brush sliding positioning parts (16), the two square grooves are sliding through grooves (14) used for sliding the carbon brushes (6) and the spring rolls (10), fixing plate clamping grooves (15) used for limiting the carbon brushes (11) are tightly attached to the two-section arm guide rails, the carbon brushes (6) are matched with the inner side surfaces of the carbon brushes (6), and the inner side surfaces of the carbon brushes (6) are matched with the inclined surfaces of the spring rolls.
  2. 2. The grounding device for a crane boom according to claim 1, wherein the top of the base (5) is provided with an end cover (1), and the top of the fixing piece (11) is connected with the end cover (1).
  3. 3. The grounding device for a crane boom according to claim 1, wherein the upper part of the fixing piece (11) is bent, the bent part is arranged at the center position of the inner side of the end cover (1), and the fixing piece (11) and the spring coil (10) are integrated.
  4. 4. The grounding device for the crane boom according to claim 1, wherein the carbon brush connecting portion (17) is of a hollow cylindrical structure, and two end cover mounting holes (13) for fixing an end cover in a matched manner with the fixing screw (2) are symmetrically formed in the carbon brush connecting portion (17).
  5. 5. The grounding device for a crane boom according to claim 1, characterized in that the fixed bottom plate (4) is diamond-shaped, and both ends of the long diagonal line of the diamond are provided with base mounting holes (12) for connecting the base (5) with the basic boom of the crane.
  6. 6. The grounding device for a crane boom according to claim 1, wherein the wire is a copper stranded wire (7), the lower end of the copper stranded wire (7) is embedded into the carbon brush (6), and the upper end of the copper stranded wire is connected with the base (5).
  7. 7. The grounding device for the crane boom according to claim 6, wherein a boss for connecting the copper stranded wires (7) is arranged on the inner wall of the carbon brush connecting part (17), and a carbon brush connecting mounting hole (18) is formed in the boss.
  8. 8. The grounding device for a crane boom according to claim 7, characterized in that the upper end of the copper stranded wire (7) is connected with the base (5) through an open wiring copper nose (8).
  9. 9. The grounding device for a crane boom according to claim 8, characterized in that the open wiring copper nose (8) and the copper strand (7) are welded together by ultrasonic welding.
  10. 10. The grounding device for a crane boom according to claim 8, characterized in that the open wiring copper nose (8) is crimped at the carbon brush connection mounting hole (18) via a grounding screw (9).

Description

Grounding device for crane boom Technical Field The utility model belongs to the field of engineering machinery, and particularly relates to a grounding device for a crane boom. Background The conventional railway crane boom grounding device generally adopts a mode of fixing a wire connection type, wherein a basic arm and two sections of arms of a vehicle body are directly connected through wires, but the wires are easily pulled to cause breakage in the telescoping process, a slip ring or a sliding contact structure is conducted in a sliding contact mode, the contact surface is worn due to long-term shaking, poor grounding is caused, safety accidents are caused, and a rigid conductive bracket cannot adapt to dynamic shaking, and is easy to generate gaps due to shaking, so that grounding failure is caused. The present utility model has been made in view of the above-mentioned problems occurring in the prior art of grounding devices. Disclosure of Invention The utility model aims to overcome the defects in the prior art and provide the grounding device for the self-adaptive telescopic crane boom. The grounding device for the crane boom comprises a base, carbon brushes, a fixing sheet and a spring coil, wherein the carbon brushes are arranged in the base, the carbon brushes are connected with the base through wires, the upper portion of the fixing sheet is directly or indirectly connected with the base, the spring coil for pushing the carbon brushes to cling to two-section arm guide rails of the crane is tangentially arranged at the bottom of the fixing sheet, the base comprises a middle fixing bottom plate, a carbon brush connecting portion arranged at the upper portion of the fixing bottom plate and a carbon brush sliding positioning portion arranged at the lower portion of the fixing bottom plate, the carbon brush connecting portion is communicated with the inside of the carbon brush sliding positioning portion, a convex groove formed by two square grooves is formed in the carbon brush sliding positioning portion, the two square grooves are respectively a sliding through groove for sliding and stretching out and drawing back of the carbon brushes, and a fixing sheet clamping groove for limiting the fixing sheet, the inner size of the carbon brush sliding through groove is matched with the outer contour of the carbon brushes, and the upper end face is an inclined face matched with the spring coil. An end cover is arranged at the top of the base, and the top of the fixing piece is connected with the end cover. The upper part of the fixing piece is bent, the bending part is arranged at the center position of the inner side of the end cover, and the fixing piece and the spring are coiled into a whole. The carbon brush connecting part is of a hollow cylindrical structure, and two end cover mounting holes for fixing the end cover in a matched mode with the fixing screw are symmetrically formed in the carbon brush connecting part. The fixed bottom plate is diamond-shaped, and base mounting holes for connecting the base with the basic arm of the crane are formed in two ends of the long diagonal line of the diamond. The wire is copper stranded wire, the lower extreme embedding carbon brush is inside, and the upper end is connected with the base. The inner wall of the carbon brush connecting part is provided with a boss for connecting the copper stranded wires, and the boss is provided with a carbon brush connecting mounting hole. The upper end of the copper stranded wire is connected with the base through an opening wiring copper nose. The open wiring copper nose and the copper stranded wire are welded together through an ultrasonic welding method. The opening wiring copper nose is pressed and connected to the carbon brush connection mounting hole through the grounding screw. Compared with the prior art, the self-adaptive telescopic crane boom dynamic grounding device has the advantages that the safety problems of poor grounding and the like caused by shaking of the boom when the crane boom stretches and stretches are effectively solved, when the crane boom stretches and stretches, the spring coil always pushes the carbon brush to downwards cling to the two-section arm guide rail along the sliding and positioning part of the carbon brush to keep contact pressure, the conductivity and the corrosion resistance of the self-adaptive telescopic crane boom dynamic grounding device are good, an electric passage is formed by connecting the vehicle body and the steel rail together, the safety reliability of electric reflux of the whole vehicle system is greatly improved, the safety of vehicle-mounted equipment and personnel on the vehicle is ensured, the safety operation requirement of the whole vehicle is met, the self-adaptive grounding device is simple in structure and convenient to manufacture, the self-adaptive grounding device driven by the spring is synchronous with the telescopic operation requirement of the boom, th