CN214616410U

CN214616410U - Lifting device

Info

Publication number: CN214616410U
Application number: CN202120658716.6U
Authority: CN
Inventors: 程强伟; 付汉东; 张华知
Original assignee: Shanghai Jintai Engineering Machinery Co Ltd
Current assignee: Shanghai Jintai Engineering Machinery Co Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-11-05
Anticipated expiration: 2031-03-31

Abstract

The utility model relates to the field of engineering machinery, in particular to an elevator and a rotary drilling rig; the elevator comprises a mandrel and a hook, wherein the shaft end of the mandrel is inserted into a cavity of the hook, and a connecting flange, an oil seal, an angular contact bearing, a thrust bearing and a locking nut are sequentially arranged between the mandrel and the hook; the method is characterized in that: the thrust bearing is arranged behind the cushion ring; the upper end of the inner ring of the connecting flange is provided with a plurality of oil seals, the lower end of the inner ring of the connecting flange is provided with an angular contact bearing, the lower part of the shaft end of the mandrel is provided with an angular contact bearing, and the two angular contact bearings are used for limiting and positioning the positions of the mandrel and the hook. This elevator eliminates the dabber of elevator and the clearance of couple through increasing backing ring, bearing to improve the atress condition of dabber, simultaneously, this elevator has still increased the oiling mouth so that to dabber and couple between the cavity oiling, thereby effectively improve the inside operating mode of elevator and reduce the emergence of oil leak condition.

Description

Lifting device

Technical Field

The utility model relates to an engineering machine tool field specifically is an elevator.

Background

The elevator of the rotary drilling rig is a tool for clamping a drill rod lock joint in the operation of lifting a drilling tool and hoisting the drilling tool. As shown in fig. 1, the currently used elevator is not easy to be removed and repaired after the mandrel is deformed due to the internal bearing mounting structure problem, and the sealing between the mandrel and the hook is easy to lose efficacy after long-time use, so that the problem of oil leakage occurs.

Disclosure of Invention

An object of the utility model is to overcome above-mentioned defect, provide an elevator that has changed atress structure, it has longer life and be difficult for the oil leak.

In order to achieve the above object, the present invention is realized as follows:

an elevator comprises a mandrel and a hook, wherein the shaft end of the mandrel is inserted into a cavity of the hook, and a connecting flange, an oil seal, an angular contact bearing, a thrust bearing and a locking nut are sequentially arranged between the mandrel and the hook; the thrust bearing is arranged behind the cushion ring; the inner ring of the connecting flange is provided with an oil seal, the angular contact bearings are arranged on the upper portions of the connecting flange and the shaft end of the mandrel, the lower portion of the shaft end of the mandrel is provided with the angular contact bearings, and the two angular contact bearings are used for limiting and positioning the positions of the mandrel and the hook.

The elevator, flange inner circle upper end is equipped with a plurality of oil seals, the oil seal setting is between flange and dabber.

And the upper part and the lower part of the shaft end of the mandrel of the elevator are provided with positioning angle contact bearings, and the upper part angle contact bearings are simultaneously arranged in the connecting flange.

This elevator eliminates the dabber of elevator and the clearance of couple through increasing backing ring, bearing to improve the atress condition of dabber, simultaneously, this elevator has still increased the oiling mouth so that to dabber and couple between the cavity oiling, thereby effectively improve the inside operating mode of elevator and reduce the emergence of oil leak condition.

Drawings

Fig. 1 is a schematic structural view of a conventional elevator.

Fig. 2 is a schematic structural diagram of the elevator of the present invention.

Detailed Description

The invention is further illustrated by the following specific examples.

As shown in fig. 2, the elevator comprises a mandrel 1 and a hook 2, wherein the shaft end of the mandrel 1 is inserted into the cavity of the hook 2, and a connecting flange 3, an oil seal 4, an angular contact bearing 5, a thrust bearing 6 and a locking nut 7 are sequentially arranged between the mandrel 1 and the hook 2; the thrust bearing also comprises a backing ring 8 and a ball bearing 9, wherein the backing ring 8 and the ball bearing 9 are sequentially arranged behind the thrust bearing; an oil seal 4 is arranged on an inner ring of the connecting flange 3, an angular contact bearing 5 is arranged on the upper portions of the connecting flange 3 and the shaft end of the mandrel 1, an angular contact bearing 5 is arranged on the lower portion of the shaft end of the mandrel 1, and the two angular contact bearings 5 are used for limiting and positioning the positions of the mandrel 1 and the hook 2.

The elevator, 3 inner circles upper ends of flange are equipped with a plurality of oil blanket 4, oil blanket 4 sets up between flange 3 and dabber 1.

In the elevator, the upper part and the lower part of the shaft end of the mandrel 1 are provided with positioning angular contact bearings 5, and the upper angular contact bearings 5 are simultaneously arranged in the connecting flange 3.

This elevator sets up angular contact bearing 5 through increasing 3 dress angular contact bearings 5 in the flange, and 1 axle head portion of dabber sets up angular contact bearing 5 and eliminates the dabber 1 of elevator and couple 2's clearance to improve the atress condition of dabber 1, simultaneously, this elevator has still increased oiling mouth 10 so that to the dabber and the oiling between the couple, thereby effectively improve the inside operating mode of elevator and reduce the emergence of oil leak condition.

Claims

1. An elevator comprises a mandrel and a hook, wherein the shaft end of the mandrel is inserted into a cavity of the hook, and a connecting flange, an oil seal, an angular contact bearing, a thrust bearing and a locking nut are sequentially arranged between the mandrel and the hook; the method is characterized in that: the thrust bearing is arranged behind the cushion ring; the inner ring of the connecting flange is provided with an oil seal, the angular contact bearings are arranged on the upper portions of the connecting flange and the shaft end of the mandrel, the lower portion of the shaft end of the mandrel is provided with the angular contact bearings, and the two angular contact bearings are used for limiting and positioning the positions of the mandrel and the hook.

2. The elevator as set forth in claim 1, wherein: a plurality of oil seals are arranged at the upper end of the inner ring of the connecting flange and arranged between the connecting flange and the mandrel.

3. The elevator as set forth in claim 1, wherein: and the upper part and the lower part of the shaft end of the mandrel are provided with positioning angular contact bearings, and the upper angular contact bearings are arranged in the connecting flange at the same time.