阅读说明：本技术 一种自动离合的液压紧链装置 (Hydraulic chain tightening device capable of automatically clutching ) 是由 穆润青 贾东升 解鸿章 陈海江 杨刚 蔡树梅 陈贺 王会来 武文颖 郑立彬 于 2020-12-07 设计创作，主要内容包括：本发明涉及煤矿井下工作面成套设备与技术领域,具体的说是用于张紧刮板链条的一种自动离合的液压紧链装置。该液压紧链装置由输出齿轮、减速机构和液压马达组成。输出齿轮通过螺钉安装在弹性联轴器上。减速机构通过螺钉安装在联结罩体上。液压马达通过螺钉紧固在减速机构的架体上,液压马达的输出轴与减速机构的输入齿轮通过花键联接,液压马达由液控系统控制启停。紧链时,液控系统控制推移机构的液压缸拉回活塞,通过拨叉带动惰轮平移,与输出齿轮啮合在一起,惰轮与输出齿轮都具有锁止角结构,可以实现远程控制离合。然后,通过液控系统启动马达,马达提供的液压紧链力矩即可通过传动系统传递到链轮,拖动链条,实现链条张紧。(The invention relates to the field of complete equipment and technology of underground working faces of coal mines, in particular to an automatic clutch hydraulic chain tightening device for tensioning a scraper chain. The hydraulic chain tightening device consists of an output gear, a speed reducing mechanism and a hydraulic motor. The output gear is mounted on the elastic coupling through a screw. The speed reducing mechanism is arranged on the connecting cover body through a screw. The hydraulic motor is fastened on a frame body of the speed reducing mechanism through screws, an output shaft of the hydraulic motor is connected with an input gear of the speed reducing mechanism through a spline, and the hydraulic motor is controlled by the hydraulic control system to start and stop. When the chain is tightened, the hydraulic cylinder of the hydraulic control system control pushing mechanism pulls back the piston, the shifting fork drives the idler to translate, the idler and the output gear are meshed together, the idler and the output gear are both provided with locking angle structures, and remote control clutch can be achieved. Then, the motor is started through the hydraulic control system, and the hydraulic chain tightening torque provided by the motor can be transmitted to the chain wheel through the transmission system to drag the chain, so that the chain is tensioned.)

1. The utility model provides an automatic tight chain device of hydraulic pressure of separation and reunion which characterized in that: consists of an output gear (1), a speed reducing mechanism (2) and a hydraulic motor (3);

the speed reducing mechanism (2) consists of a frame body (21), an input gear (22), an idle gear (23), a guide shaft (24), a shifting fork (25) and a pushing hydraulic cylinder (26); an input gear (22) is supported on a frame body (21) through a bearing, the input gear (22) is meshed with an idle gear (23), the idle gear (23) can axially translate on a guide shaft (24) through a spline, a shifting fork (25) is hinged and fixed on a piston rod of a pushing hydraulic cylinder (26), and the shifting fork (25) is clamped in a groove of the idle gear (23);

the hydraulic motor (3) is fastened on a frame body (21) of the speed reducing mechanism (2) through screws, and an output shaft of the hydraulic motor (3) is connected with an input gear (22) of the speed reducing mechanism (2) through a spline;

the output gear (1) and the idle gear (23) have a locking angle structure, and the idle gear (23) can be separated from or meshed with the output gear (1) when axially translating.

Technical Field

The invention relates to the field of complete equipment and technology of underground working faces of coal mines, in particular to an automatic clutch hydraulic chain tightening device for tensioning a scraper chain.

Background

At present, the chain tightening mode of underground coal mine conveying equipment mainly comprises two modes: one is a brake disc chain tightening mode, and the other is a hydraulic chain tightening mode. The brake disc chain tightening mode has low cost and simple structure, the operation is a inching motor, the chain is dragged by the inertia of a transmission system, then the brake disc is tightened by hand, but the brake disc is limited by braking torque, the brake disc is only suitable for a low-power conveyor, in addition, the chain tightening process needs high operation skill, and the safety is poor. The hydraulic chain tightening mode is generally applied to high-power underground conveying equipment, and in chain tightening operation, a plurality of people are required to be closely matched to complete the chain tightening process. Firstly, to realize the clutch of the chain tightening gear, when the scraper conveyor normally works, the chain tightening gear is in a separated state, and when the chain is required to be tightened, the chain tightening gear is in a meshed state, so that an operator needs to push the idler wheel to axially translate and separate or mesh with the output gear by using the handle. The idler gear is relatively easy to disengage from the output gear, but it is very difficult to return to the engaged state because the end faces of the two gears are usually in an interference state, so that manual turning is required, and a hole for auxiliary installation and observation needs to be reserved, so that the teeth of the idler gear can enter into the tooth grooves of the output gear to realize engagement, and then the motor can be started through a hydraulic control system to provide chain tightening torque to drag a chain, so that the chain is tensioned. The whole chain tightening process is complex in operation, long in time consumption and has certain potential safety hazard.

The hydraulic chain tensioning device capable of automatically clutching is designed for adapting to the automation and intelligent development direction of equipment on the underground working face of a coal mine and improving the automation degree and safety and reliability of chain tensioning operation of conveying equipment.

Disclosure of Invention

The invention aims to realize automation of chain tightening operation of underground coal mine conveying equipment.

The purpose of the invention is realized by the following technical scheme:

a hydraulic chain tightener with automatic clutch is composed of output gear, speed reducer and hydraulic motor.

The speed reducing mechanism consists of a frame body, an input gear, an idler wheel, a guide shaft, a shifting fork and a pushing hydraulic cylinder; the input gear is supported on the frame body through a bearing, the input gear is meshed with the idler wheel, the idler wheel can axially translate on the guide shaft through a spline, the shifting fork is hinged and fixed on a piston rod of the pushing hydraulic cylinder, and the shifting fork is clamped in a groove of the idler wheel.

The hydraulic motor is fastened on a frame body of the speed reducing mechanism through screws, and an output shaft of the hydraulic motor is connected with an input gear of the speed reducing mechanism through a spline.

The output gear and the idle gear are provided with angle locking structures, and the idle gear can be separated from or meshed with the output gear when axially translated.

The invention has the following beneficial effects: when the scraper conveyor needs chain tightening, firstly, a hydraulic control system of the pushing hydraulic cylinder is remotely operated, the hydraulic cylinder of the pushing mechanism is controlled to pull back the piston, and the shifting fork fixedly hinged on the piston rod drives the idler wheel to translate on the guide shaft, so that time-consuming, labor-consuming and unsafe factors caused by manual operation of a handle on an operation site are avoided; secondly, the idler and the output gear are both provided with locking angle structures, when the idler axially translates, the idler can automatically enter the tooth groove of the output gear through the large chamfer of the tooth end to achieve a meshing state, the process of manually turning and observing and correcting the position of the output gear is omitted, and automatic clutch of the chain tightening gear is realized. The whole chain tensioning process only needs to remotely control the hydraulic control system, so that the automation degree of the chain tightening operation of the underground coal mine conveying equipment is improved, and the working efficiency and the safety and reliability of the chain tightening operation are improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the invention and are not to limit the invention. In the drawings:

fig. 1 is a structural arrangement diagram of the present invention.

Fig. 2 is a schematic view (top view, with the top plate removed) of the structure of the present invention.

Fig. 3 is a schematic view of the coupling of the hydraulic motor and the reduction mechanism (a-a sectional view of fig. 2).

Fig. 4 is a schematic view showing the coupling of the idler pulley with the guide shaft (a sectional view taken along line B-B in fig. 2).

Fig. 5 is a schematic view showing the coupling of the shift fork to the pushing cylinder (C-C sectional view of fig. 2).

Fig. 6 is a view showing a lock angle structure of an end surface of the output gear and the idler gear.

Fig. 7 is a schematic view of the process of meshing the output gear with the idler gear.

In the figure: 1. the hydraulic control system comprises an output gear, 2 speed reducing mechanisms, 3 hydraulic motors, 21 frame bodies, 22 input gears, 23 idle gears, 24 guide shafts, 25 shifting forks, 26 pushing hydraulic cylinders and YK. hydraulic control systems.

Detailed Description

The technical solutions in the embodiments of the present invention are fully and clearly described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of them.

A hydraulic chain tightener with automatic clutch is composed of an output gear 1, a speed reducing mechanism 2 and a hydraulic motor 3, as shown in figure 1, the output gear 1 is installed on an elastic coupler of a transmission system through screws, the speed reducing mechanism 2 is installed on a connecting cover body through screws, and the hydraulic motor 3 is connected with a hydraulic control system.

The speed reducing mechanism 2 is composed of a frame body 21, an input gear 22, an idle gear 23, a guide shaft 24, a shifting fork 25 and a pushing hydraulic cylinder 26, and is shown in fig. 2. In fig. 3, the input gear 22 is supported on the frame body 21 by a bearing, and the input gear 22 is meshed with the idle gear 23. In fig. 4, the idler wheel 23 is axially translatable on the guide shaft 24 by means of splines. In fig. 5, a fork 25 is fixed to a piston rod of a pushing cylinder 26 in a hinged manner, the fork 25 is engaged in a groove of the idler wheel 23, and the pushing cylinder 26 is connected to a hydraulic control system.

The hydraulic motor 3 is fastened to the frame body 21 of the speed reducing mechanism 2 by screws, and an output shaft of the hydraulic motor 3 is coupled to an input gear 22 of the speed reducing mechanism 2 by splines, as shown in fig. 3.

The output gear 1 and the idle gear 23 have a locking angle structure, and as shown in fig. 6, the idle gear 23 can be separated from or meshed with the output gear 1 when axially translating. Fig. 7 is a schematic view showing a process in which the idle gear 23 is gradually engaged with the output gear 1 in translation.

When the scraper conveyor normally works, the idle wheel 23 of the speed reducing mechanism 2 is separated from the output gear 1, and the hydraulic chain tightening device is in a disengagement state with a transmission system of the scraper conveyor. When the scraper conveyor needs chain tightening operation, firstly, a hydraulic control system of a pushing hydraulic cylinder 26 is remotely operated, the hydraulic cylinder of a pushing mechanism is controlled to pull back a piston, a shifting fork 25 which is hinged and fixed on a piston rod drives an idler wheel 23 to translate on a guide shaft 24, in the translation process, because the idler wheel 23 and an output gear 1 are both provided with locking angle structures, two gears can rotate relatively through the inclined plane contact of a large chamfer at the tooth end, so that the teeth of the idler wheel 23 automatically enter the tooth grooves of the output gear 1 to reach a meshing state, and the automatic meshing of the chain tightening gear is realized. The gear with the lock angle structure is widely applied to synchronizers in the automobile industry, and details about a deep principle of autonomous meshing and a design and processing technology of the lock angle are not repeated. Then, a motor is started through a hydraulic control system, and hydraulic chain tightening torque provided by the motor can be transmitted to an elastic coupling of a transmission system through an input gear 22, an idler gear 23 and an output gear 1 and then transmitted to a chain wheel to drag a chain, so that the chain is tensioned; finally, after the link disassembling and connecting operation is completed, the hydraulic control system of the pushing hydraulic cylinder 26 can be remotely operated to control the hydraulic cylinder of the pushing mechanism to push out the piston, and the shifting fork 25 hinged and fixed on the piston rod drives the idle wheel 23 to translate on the guide shaft 24 and separate from the output gear 1.

Therefore, the clutch of the chain tightening gear and the whole chain tensioning process only need to remotely control the hydraulic control system, processes such as manual operation of a handle on site, manual turning and observation and correction of the position of the output gear during operation in a traditional hydraulic chain tightening mode are avoided, the defects of time consumption, labor consumption and insecurity are overcome, the automation degree of chain tightening operation of underground coal mine conveying equipment is improved, and the working efficiency and the safety and reliability of the chain tightening operation are improved.

It should be understood that the above detailed description of the technical solution of the present invention with the help of preferred embodiments is illustrative and not restrictive. After reading the description of the present invention, those skilled in the art may modify the technical solutions described in the embodiments or make equivalent substitutions for some technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.