BACKGROUND

Technical Field

The present application relates to the field of lifting equipment, and specifically to a traction machine and a lifting equipment.

Description of the Related Art

The existing traction machine plays an important role in the ascending and descending of the lifting equipment. During the ascending of the lifting equipment, the power is mainly provided by the traction machine; while during the descending of the lifting equipment, the braking force is mainly provided by the traction machine to the lifting equipment.

During the operation, the existing traction machine may be in states where the fixed pulley is slipping, the traction rope is over-speed or the traction machine is not in operation, which will lead to that the lifting speed of the lifting equipment is not controlled. Therefore, it is necessary to provide a traction machine capable of monitoring the working state.

In addition, during the descending of the lifting equipment, in order to control the speed of the lifting equipment, the bus voltage of the controller of the traction machine will be changed, thereby affecting the stability of the controller.

BRIEF SUMMARY

The present application aims to solve at least one of the technical problems existing in the prior art or the related art.

One of the objectives of the present application is to provide a traction machine and a lifting equipment to solve the technical problem existing in the prior art that once the traction machine is slipping, the traction rope is over-speed or the traction machine is not in operation, the lifting speed of the lifting equipment would not be controlled.

In order to achieve the objective, the present application provides a traction machine, including traction pulleys, traction ropes driven by the traction pulleys and fixed pulleys for changing directions of the traction ropes; wherein the fixed pulley is provided with a sensor sensing member rotating with the fixed pulley, a traction machine sensor is arranged beside the fixed pulley; the traction machine sensor is configured to detect a rotation speed of the sensor sensing member, and send the rotation speed to a controller of the traction machine; the controller controls a rotation of the traction pulley according to detected data of the traction machine sensor.

Since this kind of traction machine is provided with the sensor sensing member and the traction machine sensor, it is capable of detecting whether the traction machine has an abnormal operation, and stopping the traction machine in an abnormal state.

According to an embodiment of the present application, the controller of the traction machine is connected to the bus of the controller, and the bus of the controller is provided with a resistance module.

Since the resistance module is provided, when the bus voltage of the controller of the traction machine increases, the resistance module will automatically generate heat and convert the additional electric energy into the heat energy of the resistance module to be consumed, so that the bus voltage of the controller of the traction machine is maintained within a safe range.

The other objective of the present application is to provide a lifting equipment, including the traction machine above; wherein the lifting equipment further includes a climbing member, a guide rail and a lifting vehicle; the guide rail is arranged on the climbing member.

According to an embodiment of the present application, the guide rail is provided with a closing groove extending along a longitudinal direction of the guide rail, and an anti-falling device capable of ascending and descending along the guide rail is mounted on the lifting vehicle; the anti-falling device includes an anti-falling main body embedded in the closing groove; the anti-falling main body is provided with first rollers in the closing groove and capable of sliding along an inner wall of the closing groove; the anti-falling device further includes a second roller arranged at an opening of the closing groove and capable of sliding along the opening.

According to an embodiment of the present application, a number of the first rollers is at least two, and the first rollers are mounted on both sides of the anti-falling main body through a first roll shaft; the second roller is mounted to a front surface of the anti-falling main body through a second roll shaft, and the second roll shaft is perpendicular to the first roll shaft.

According to an embodiment of the present application, one side away from the closing groove of the second roller is provided with a wear plate; the second roll shaft is fixed to the lifting vehicle by sequentially penetrating through the anti-falling main body, the second roller, a first positioning sleeve and the wear plate; the wear plate is mounted to the second roll shaft through the first positioning sleeve.

According to an embodiment of the present application, a first elastic member capable of extending and retracting along a second roll shaft direction is arranged between the second roller and the anti-falling main body.

According to an embodiment of the present application, the second roller is connected to an upper portion of the anti-falling main body, and a lower portion of the anti-falling main body is provided with a second positioning sleeve; the second positioning sleeve is mounted to the front surface of the anti-falling main body through a third roll shaft which is parallel to the second roll shaft; and a second elastic member capable of extending and retracting along a length direction of the third roll shaft is arranged between the second positioning sleeve and the anti-falling main body.

According to an embodiment of the present application, the lifting equipment further includes a stall braking device mounted on the lifting vehicle; the stall braking device includes a speed-limiting assembly and a safety protection assembly.

According to an embodiment of the present application, the speed-limiting assembly includes a speed measuring wheel, a centrifugal block and a braking cam; the centrifugal block is fixed to the speed measuring wheel and rotates with the speed measuring wheel, and the centrifugal block satisfies: when a rotation speed of the speed measuring wheel is not less than a set speed, the centrifugal block opens and connects the braking cam so as to drive the braking cam to rotate.

According to an embodiment of the present application, the speed measuring wheel and the centrifugal block are fixedly mounted on a main shaft, and the speed measuring wheel drives the centrifugal block to rotate through the main shaft; the braking cam is fixedly mounted on a transmission shaft, and the centrifugal block is connected to the transmission shaft through a transmission sleeve when opened.

According to an embodiment of the present application, the main shaft is provided with a first through hole in a radial direction; after a centrifugal spring passes through the first through hole, each of two ends of the centrifugal spring is fixed with a centrifugal block, respectively; lugs are formed on the main shaft, and the lug is provided with a second through hole extending axially along the main shaft; the centrifugal block is hinged to the second through hole through a pin shaft, so that the centrifugal block rotates with the second through hole as an axis and opens.

According to an embodiment of the present application, a first circumferential limiting member is formed on an outer surface of the centrifugal block, and a second circumferential limiting member is formed on an inner surface of the transmission sleeve; when the centrifugal block opens, the first circumferential limiting member and the second circumferential limiting member are circumferentially locked.

According to an embodiment of the present application, the outer surface of the centrifugal block includes two first involute surfaces, and the first circumferential limiting member is formed between the first involute surfaces; the inner surface of the transmission sleeve includes two second involute surfaces, and the second circumferential limiting member is formed between the second involute surfaces.

According to an embodiment of the present application, the safety protection assembly includes a locking block hinged on the lifting vehicle; and when the lifting vehicle operates normally, the locking block compresses a spring, and when the lifting vehicle stalls, the spring ejects the locking block so that the locking block is embedded in a locking hole of the guide rail.

According to an embodiment of the present application, one side facing the climbing member of the guide rail is provided with friction protrusions.

According to an embodiment of the present application, the top portion of the guide rail is mounted with guiding pulleys for the traction rope, and the bottom portion of the guide rail is provided with a tensioning device for the traction rope.

According to an embodiment of the present application, the lifting vehicle is connected to the traction rope, and the climbing member is provided with a traction rope protection assembly; the traction rope protection assembly includes idler rollers and a mounting bracket for mounting the idler rollers to the climbing member; a rotation direction of the idler roller is perpendicular to a lifting direction of the traction rope, and the idler rollers are between the climbing member and the traction rope.

According to an embodiment of the present application, a double-hand switch is provided on the lifting vehicle.

According to an embodiment of the present application, triggering blocks are arranged on the climbing member or the guide rail corresponding to places where space changes; when the lifting vehicle runs to the triggering block, the triggering block sends current position information to the controller, and the controller controls an operating speed of the lifting vehicle according to the position information.

