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CN-224213148-U - Middle supporting leg rotating device of bridge girder erection machine

CN224213148UCN 224213148 UCN224213148 UCN 224213148UCN-224213148-U

Abstract

The utility model discloses a middle supporting leg rotating device of a bridge girder erection machine, which comprises a fixed seat, wherein a driving shaft and a driving gear are arranged on the fixed seat, a cavity is formed in the driving gear, a fixed block and a moving block are arranged in the cavity, a moving spring is arranged between the fixed block and the moving block, a lubrication groove is formed between teeth of the driving gear, a plug is arranged on the moving block, a moving groove is formed between teeth on two sides of the lubrication groove, a moving plate is arranged on the moving block, a limit frame is arranged on one side of the fixed seat, a limit screw and a limit rack are arranged on the limit frame, the moving plate is extruded through a transmission gear to drive the moving block and the plug to move, the lubrication groove is opened, lubricating oil in the cavity flows out through the lubrication groove, gear lubrication is further carried out between the transmission gear and the driving gear, abrasion between teeth is reduced, the limit rack is driven to move on the limit frame through the limit screw, the limit rack is conveniently aligned with the teeth of the driving gear, and the stability of the positions of the driving gear and the middle supporting leg is further improved.

Inventors

  • ZHANG QINGYUAN
  • GAO HONGXUN
  • Kuo Jiajia
  • ZHANG HANYUN
  • SONG SHUAINAN

Assignees

  • 河南吉尼智能起重机有限公司

Dates

Publication Date
20260508
Application Date
20250606

Claims (8)

  1. 1. The utility model provides a well landing leg rotary device of bridge crane, includes fixing base (1), characterized by is equipped with drive shaft (2) on fixing base (1), be equipped with drive gear (3) on drive shaft (2), drive gear (3) inside is equipped with cavity (4), the circumference is equipped with fixed block (5) and movable block (6) in cavity (4), be equipped with between fixed block (5) and movable block (6) and remove spring (7), be equipped with lubrication groove (8) between the tooth of drive gear (3), be provided with on movable block (6) with lubrication groove (8) complex end cap (9), be equipped with on lubrication groove (8) both sides tooth between be equipped with movable groove (10), be provided with on movable block (6) with movable groove (10) complex movable plate (11), one side of fixing base (1) is equipped with spacing (12), it is equipped with spacing screw (13) to rotate on spacing frame (12), one end of spacing screw (13) is equipped with spacing knob (14), spacing screw (13) are last to be connected and are equipped with spacing knob (15).
  2. 2. The middle supporting leg rotating device of the bridge girder erection machine according to claim 1, wherein an oil delivery pipe (16) is arranged on the inner side of the driving shaft (2), and oil delivery holes (17) are formed in circumferential communication between the oil delivery pipe (16) and the cavity (4).
  3. 3. The middle supporting leg rotating device of the bridge girder erection machine according to claim 1, wherein a first transmission shaft (18) and a second transmission shaft (19) are arranged on two sides of the driving gear (3), and transmission gears (20) are arranged on the first transmission shaft (18) and the second transmission shaft (19).
  4. 4. The middle supporting leg rotating device of the bridge girder erection machine according to claim 3, wherein a transmission motor (21) is arranged at the bottom of the first transmission shaft (18), a rotating shaft (22) is rotatably arranged in the fixing seat (1), and rotating gears (23) are arranged on the rotating shaft (22) and the second transmission shaft (19).
  5. 5. The middle supporting leg rotating device of the bridge girder erection machine according to claim 4, wherein a synchronous belt transmission assembly (24) is arranged between the first transmission shaft (18) and the rotating shaft (22).
  6. 6. The middle supporting leg rotating device of the bridge girder erection machine according to claim 1 is characterized in that a rotating ring (25) is arranged on the fixing seat (1) of the driving shaft (2).
  7. 7. The middle supporting leg rotating device of the bridge girder erection machine according to claim 1 is characterized in that a sliding groove (26) is formed in the fixed seat (1), and a sliding block (27) matched with the sliding groove (26) is arranged at the bottom of the limiting frame (12).
  8. 8. The middle supporting leg rotating device of the bridge girder erection machine according to claim 7, wherein an adjusting box (28) is arranged on one side of the sliding groove (26), an adjusting screw (29) is rotatably arranged in the adjusting box (28), and the adjusting screw (29) is in threaded connection with the sliding block (27).

Description

Middle supporting leg rotating device of bridge girder erection machine Technical Field The utility model relates to the technical field of bridge girder erection machines, in particular to a middle supporting leg rotating device of a bridge girder erection machine. Background Along with the rapid development of the construction of the traffic infrastructure in China, the bridge girder erection machine is used as core equipment for bridge construction, the technical level of the bridge girder erection machine directly influences the engineering quality and the construction efficiency, and at present, the construction of the highway and railway bridges is forward developed in the large-span and heavy-duty directions, so that higher requirements are put forward on the performance of the bridge girder erection machine, and the middle supporting leg rotating device of the bridge girder erection machine is a key component for ensuring the bridge girder erection machine to flexibly adjust the position in the construction process and adapt to the erection of different bridge spans and curve sections. The China patent application number 202121276890.0 discloses a landing leg rotating device in a bridge girder erection machine, a driving gear can only slide along one side of a T-shaped groove after rotation is completed, the tooth block of the pushing block and the tooth of the driving gear can not be meshed accurately every time, meanwhile, a lubricating device is lacked between the driving gear and a driving gear, so that friction loss of a gear piece is aggravated, transmission efficiency is reduced, reliability of equipment is reduced, and transmission precision of the gear is reduced. Disclosure of utility model (One) solving the technical problems Aiming at the problems in the prior art, the utility model provides a middle supporting leg rotating device of a bridge girder erection machine, which aims to solve the technical problems in the background art. (II) technical scheme The middle supporting leg rotating device of the bridge girder erection machine comprises a fixed seat, wherein a driving shaft is arranged on the fixed seat, a driving gear is arranged on the driving shaft, a cavity is formed in the driving gear, a fixed block and a movable block are circumferentially arranged in the cavity, a movable spring is arranged between the fixed block and the movable block, a lubrication groove is formed between teeth of the driving gear, a plug matched with the lubrication groove is arranged on the movable block, a movable groove is formed between teeth on two sides of the lubrication groove, a movable plate matched with the movable groove is arranged on the movable block, a limit frame is arranged on one side of the fixed seat, a limit screw is rotationally arranged on the limit frame, a limit knob is arranged at one end of the limit screw, and a limit rack is connected to the limit screw in a threaded manner. The utility model is further characterized in that the inner side of the driving shaft is provided with an oil delivery pipe, and oil delivery holes are formed in circumferential communication between the oil delivery pipe and the cavity, so that lubricating oil can be conveniently injected into the cavity. The utility model is further characterized in that a first transmission shaft and a second transmission shaft are arranged on two sides of the driving gear, and the driving gear is driven to rotate by the transmission gear. The utility model is further characterized in that a transmission motor is arranged at the bottom of the first transmission shaft, a rotation shaft is rotatably arranged in the fixing seat, rotation gears are arranged on the rotation shaft and the second transmission shaft, the first transmission shaft is driven to rotate by the transmission motor, and the second transmission shaft is driven to rotate by the cooperation of the rotation shaft and the rotation gears. The utility model is further characterized in that a synchronous belt transmission assembly is arranged between the first transmission shaft and the rotating shaft, so that synchronous rotation of the first transmission shaft and the second transmission shaft is realized. According to the utility model, the driving shaft is provided with the rotating ring on the fixing seat, so that the rotation stability of the driving shaft is improved. The utility model is further characterized in that the fixed seat is provided with a sliding groove, and the bottom of the limiting frame is provided with a sliding block matched with the sliding groove to limit the moving direction of the limiting frame. The utility model is further characterized in that an adjusting box is arranged on one side of the sliding groove, an adjusting screw is rotationally arranged in the adjusting box, and the adjusting screw is in threaded connection with the sliding block, so that the position of the limiting rack can be conveniently adjusted. (III) bene