1. The utility model provides a single cylinder embeds flexible tail which characterized in that: comprises a tail frame (1), an oil cylinder (2), a movable frame (3) and a chain wheel (4); a connecting lug A (11) is welded in the middle of the interior of the tail frame (1); the movable frame (3) is arranged inside the tail frame (1), and a connecting lug B (31) is welded in the middle of the movable frame (3); the oil cylinder (3) is arranged in the telescopic tail, and two ends of the oil cylinder (3) are respectively connected with the connecting lug A (11) and the connecting lug B (31) through connecting pins; a round hole A (17) is arranged on the middle plate right above the connecting lug A (11), and a round hole B (36) is arranged on the middle plate right above the connecting lug B (31).

2. The single-cylinder built-in telescopic tail according to claim 1, characterized in that the side plates at both sides of the tail frame (1) are provided with slideways (14), a connecting plate A (13) is welded above the slideways (14) at both sides, and a plurality of positioning pin holes A (15) with the interval of 125mm are equidistantly arranged on the connecting plate A (13); the movable frame (3) both sides are provided with slider (32), are provided with connecting plate B (33) on slider (32), and connecting plate B (33) and slider (32) welding are as an organic whole, and equidistant a plurality of location pinhole B (35) that the interval is 100mm that have arranged on connecting plate B (33).

3. The single-cylinder built-in telescopic tail according to claim 1, wherein bosses (34) and square openings (37) are arranged on two sides in front of the movable frame (3); the two ends of the chain wheel (4) are provided with square blocks (41) and grooves (42), the square blocks (41) and the grooves (42) on the chain wheel (4) are respectively matched and installed with square openings (37) and bosses (34) on the movable frame (3) and are fixed by pressing blocks (5), and the pressing blocks (5) are fixedly connected with the movable frame (3) through bolts; the tongue plate (10) is connected with the movable frame into a whole through bolts.

4. The single-cylinder built-in telescopic tail according to claim 1, characterized in that windows (16) are arranged on side plates on two sides of the tail frame (1), a tail baffle (12) is welded above one side of the tail frame (1), a hydraulic control system (8) is installed on the tail baffle (12), and the hydraulic control system (8) is connected with the tail baffle (12) through bolts; and a liquid outlet and a liquid return port of the hydraulic control system (8) are respectively connected with a rodless cavity and a rod cavity of the oil cylinder (3) through hydraulic pipelines.

5. The single-cylinder built-in telescopic tail according to claim 1, characterized in that an upper cover plate (7), a rear cover plate (6) and side cover plates (9) are respectively arranged above, behind and on two sides of the tail frame (1); the upper cover plate (7), the rear cover plate (6) and the side cover plate (9) are respectively connected and fixed with the tail frame (1) through bolts; the middle of the side cover plate (9) is provided with a rectangular opening (91).

6. A crossheading scraper reloader characterized in that it is provided with a single-cylinder built-in telescopic tail according to any of claims 1 to 5.

Background

In the underground fully mechanized coal mining face of a coal mine, a scraper chain of a crossheading scraper elevating conveyor forms a closed transmission system through a machine head chain wheel and a machine tail chain wheel, and the closed transmission system undertakes the transportation task of coal. After the chains are connected, a certain pretightening force needs to be applied to the scraper chain, and at the moment, the telescopic machine head or the telescopic machine tail needs to push the chain wheel to apply a certain tensioning force to the chains. The traditional crossheading scraper elevating conveyor mainly depends on a telescopic machine head for tensioning a chain, the telescopic machine head consists of a machine head frame, a rear groove body, a driving device and oil cylinders, two ends of each oil cylinder are respectively connected with the machine head frame and the rear groove body, the driving device is suspended on one side of the machine head frame, and the two oil cylinders push the machine head frame and the driving device to move telescopically together. The telescopic machine head has the advantages of complex structure, difficult processing and high cost. Under the action of the weight bias of the driving device, the machine head frame and the telescopic lap joint part of the rear groove body are biased to twist, so that the clamping resistance is large during stretching, and two oil cylinders with larger thrust are required to be selected. Because the two oil cylinders are arranged on the two sides of the telescopic machine head, the strokes of the two oil cylinders cannot be completely synchronous when the two oil cylinders are pushed and pulled, the machine head frame and the rear groove body are transversely stronger when the two oil cylinders are pushed and pulled, and even the phenomenon of locking is caused easily. And traditional crossheading scraper elevating conveyor never has set up flexible tail because current flexible tail structure mainly includes mount, adjustable shelf and hydro-cylinder, if there is the tripartite problem as elevating conveyor tail: 1. when the movable frame stretches, the matching relation with the end hydraulic support is influenced, and the oil cylinders are arranged on two sides of the tail, so that the end hydraulic support is easy to interfere and collide with the oil cylinders when being pushed; 2. the center height of the traditional telescopic tail chain wheel is higher, and the requirement of the unloading height of the conveyor head cannot be met; 3. the oil cylinder is positioned in the unloading section, is easy to damage, and is difficult to realize the built-in arrangement of the oil cylinder due to the limitation of the structural space of the traditional telescopic tail. In addition, the traditional telescopic tail oil cylinder and the chain are arranged at a certain included angle, so that certain oil cylinder thrust reactive loss can be caused.

Disclosure of Invention

In view of this, the invention aims to provide a single-cylinder built-in telescopic tail, which comprises a tail frame, a movable frame and an oil cylinder. The movable frame is light in weight and small in sliding resistance, and the chain tightening force requirement can be met only by a single oil cylinder with a small cylinder diameter through calculation. A single oil cylinder is horizontally arranged in the middle of the interior of the telescopic tail, two ends of the oil cylinder are respectively connected with the tail frame and the movable frame, and the oil cylinder pushes the movable frame to telescopically slide in the tail frame. The telescopic tail is simple, compact, safe and reliable in overall structure, low in center height of the chain wheel, and capable of well avoiding the problems and reducing cost.

The invention also aims to provide a crossheading scraper elevating conveyor which is provided with a single-cylinder built-in telescopic tail, wherein the telescopic tail is positioned at a landing section, and a chain is tensioned by the telescopic tail, so that the operation is more convenient, safer and more stable.

The technical scheme adopted by the invention is as follows: a single-cylinder built-in telescopic tail comprises a tail frame 1, an oil cylinder 2, a movable frame 3 and a chain wheel 4; a connecting lug A11 is welded in the middle position inside the tail frame 1; the movable frame 3 is arranged inside the tail frame 1, and a connecting lug B31 is welded in the middle of the movable frame 3; the oil cylinder 3 is arranged in the telescopic tail, and two ends of the oil cylinder 3 are respectively connected with the connecting lug A11 and the connecting lug B31 through connecting pins; the middle plate right above the connecting lug A11 is provided with a round hole A17, and the middle plate right above the connecting lug B31 is provided with a round hole B36.

Furthermore, the side plates on two sides of the tail frame 1 are provided with slideways 14, a connecting plate A13 is welded above the slideways 14 on two sides, and a plurality of positioning pin holes A15 with the interval of 125mm are equidistantly arranged on the connecting plate A13; the two sides of the movable frame 3 are provided with sliding blocks 32, the sliding blocks 32 are provided with connecting plates B33, the connecting plates B33 and the sliding blocks 32 are welded into a whole, and a plurality of positioning pin holes B35 with the interval of 100mm are equidistantly arranged on the connecting plates B33.

Furthermore, bosses 34 and square openings 37 are arranged on two sides in front of the movable frame 3; the two ends of the chain wheel 4 are provided with a square block 41 and a groove 42, the square block 41 and the groove 42 on the chain wheel 4 are respectively matched and installed with the square opening 37 and the boss 34 on the movable frame 3 and are fixed by a pressing block 5, and the pressing block 5 is fixedly connected with the movable frame 3 through bolts; the tongue plate 10 is connected with the movable frame into a whole through bolts.

Furthermore, windows 16 are arranged on side plates on two sides of the tail frame 1, a tail baffle 12 is welded above one side of the tail frame 1, a hydraulic control system 8 is installed on the tail baffle 12, and the hydraulic control system 8 is connected with the tail baffle 12 through bolts; and a liquid outlet and a liquid return port of the hydraulic control system 8 are respectively connected with a rodless cavity and a rod cavity of the oil cylinder 3 through hydraulic pipelines.

Further, an upper cover plate 7, a rear cover plate 6 and side cover plates 9 are respectively arranged above, behind and on two sides of the tailstock 1; the upper cover plate 7, the rear cover plate 6 and the side cover plate 9 are respectively connected and fixed with the tailstock 1 through bolts; the middle of the side cover plate 9 is provided with a rectangular opening 91.

In order to achieve the purpose, the invention also provides a crossheading scraper elevating conveyor which is provided with the single-cylinder built-in telescopic tail.

The single-cylinder built-in telescopic tail provided by the invention is ingenious in design, simple and compact in structure and low in cost. Through the tight chain of flexible tail that is located the section of falling to the ground, the more convenient safety and stability of operation. The design can effectively reduce the failure rate of equipment, prolong the service life of the equipment, reduce the labor load of workers and improve the mining and transportation efficiency of a mine.

The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and the detailed description.

Description of the drawings:

FIG. 1 is a schematic view of a single-cylinder built-in telescopic tail structure of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of the structure of the tailstock of the present invention;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a schematic view of a movable frame according to the present invention;

FIG. 6 is a top view of FIG. 6;

FIG. 7 is a schematic view of the structure of the side cover plate of the present invention;

FIG. 8 is a schematic view of the sprocket construction of the present invention;

FIG. 9 is a schematic diagram of a compact structure according to the present invention;

FIG. 10 is a schematic view of the lapping and extending structure of the tailstock and the movable frame of the present invention.

In the figure: 1 tail frame, 11 connecting lugs A, 12 tail baffle plates, 13 connecting plates A, 14 slideways, 15 positioning pin holes A, 16 windows, 17 round holes A, 2 oil cylinders, 3 movable frames, 31 connecting lugs B, 32 sliders, 33 connecting plates B, 34 bosses, 35 positioning pin holes B, 36 round holes B, 37 square openings, 4 chain wheels, 41 square blocks, 42 grooves, 5 pressing blocks, 6 rear cover plates, 7 upper cover plates, 8 hydraulic control systems, 9 side cover plates, 91 rectangular openings, 10 tongue plates and 20 rubber blocks.

The specific implementation mode is as follows:

the following detailed description of embodiments of the invention is made with reference to the accompanying drawings:

as shown in figures 1-8, the single-cylinder built-in telescopic tail of the invention structurally comprises a tail frame 1, an oil cylinder 2, a movable frame 3 and a chain wheel 4; a connecting lug A11 is welded in the middle position inside the tail frame 1; the movable frame 3 is arranged inside the tail frame 1, and a connecting lug B31 is welded in the middle of the movable frame 3; the oil cylinder 3 is arranged in the telescopic tail, and two ends of the oil cylinder 3 are respectively connected with the connecting lug A11 and the connecting lug B31 through connecting pins; a middle plate right above the connecting lug A11 is provided with a round hole A17, a middle plate right above the connecting lug B31 is provided with a round hole B36, two connecting pins respectively penetrate through the round hole A17 and the round hole B36 and are inserted into the connecting lug A11 and the connecting lug B31 to fixedly connect the two ends of the oil cylinder, and then the round hole A17 and the round hole B36 are blocked by a rubber block 20 to prevent the running-out of a positioning pin and the entering of coal; when the oil cylinder needs to be disassembled, the oil cylinder can be disassembled only by pulling out the rubber block 20 and then pulling out the fixing pin for fixing the oil cylinder.

In the embodiment, the side plates at two sides of the tail frame 1 are provided with slideways 14, the upper parts of the slideways 14 at two sides are welded with a connecting plate A13, and a plurality of positioning pin holes A15 with the interval of 125mm are equidistantly arranged on the connecting plate A13; the two sides of the movable frame 3 are provided with sliding blocks 32, the sliding blocks 32 are provided with connecting plates B33, the connecting plates B33 and the sliding blocks 32 are welded into a whole, a plurality of positioning pin holes B35 with the interval of 100mm are equidistantly arranged on the connecting plates B33, when the movable frame 3 slides in a telescopic mode, each positioning pin hole A15 coincides with one positioning pin hole B35 when the movable frame moves 25mm, and the number of the positioning pin holes A15 and the positioning pin holes B35 can be set according to the tail stroke of a telescopic machine; when the positioning pin hole B35 is overlapped with the positioning pin hole A15, a positioning pin is inserted, and the tail frame 1 and the movable frame 3 can be fixed.

The side plates on the two sides of the tail frame 1 are provided with slideways 14, and the movable frame 3 is loaded into the tail frame 1 from the rear of the tail frame 1 through the slideways 14; a connecting plate A13 is arranged above the slideways 14 on the two sides, and a plurality of equidistant positioning pin holes A15 are arranged on the connecting plate A13; the two sides of the movable frame 3 are provided with slide blocks 32, the slide blocks 32 slide on the slide ways 14 on the two sides of the tail frame 1, the slide blocks 32 are provided with a connecting plate B33, the connecting plate B33 and the slide blocks 32 are welded into a whole, a plurality of equidistant positioning pin holes B35 are arranged on the connecting plate B33, when the movable frame 3 slides in a telescopic mode, positioning pins are inserted when positioning pin holes B35 on the connecting plate B33 and positioning pin holes A15 on a connecting plate A13 coincide, and the tail frame 1 and the movable frame 3 can be fixed.

In this embodiment, bosses 34 and square openings 37 are arranged on two sides in front of the movable frame 3; the two ends of the chain wheel 4 are provided with a square block 41 and a groove 42, the square block 41 and the groove 42 on the chain wheel 4 are respectively matched and installed with the square opening 37 and the boss 34 on the movable frame 3 and are fixed by a pressing block 5, and the pressing block 5 is fixedly connected with the movable frame 3 through bolts; the tongue plate 10 is connected with the movable frame into a whole through bolts, and the chain wheel 4 and the tongue plate 10 slide along with the movable frame 3.

In the embodiment, the side plates at two sides of the tail frame 1 are provided with windows 16, and the oil cylinders 2 can be disassembled and assembled through the windows 16; a tail baffle 12 is welded above one side of the tail frame 1, a hydraulic control system 8 is mounted on the tail baffle 12, and the hydraulic control system 8 is connected with the tail baffle 12 through bolts; the liquid outlet and the liquid return port of the hydraulic control system 8 are respectively connected with the rodless cavity and the rod cavity of the oil cylinder 3 through hydraulic pipelines, and the hydraulic control system 8 is operated to control the extension and retraction of the oil cylinder 2.

In this embodiment, an upper cover plate 7, a rear cover plate 6 and side cover plates 9 are respectively arranged above, behind and on two sides of the tailstock 1; the upper cover plate 7, the rear cover plate 6 and the side cover plate 9 are respectively connected and fixed with the tailstock 1 through bolts; the side cover plate 9 covers the window 16, the rectangular opening 91 is formed in the middle of the side cover plate 9, the hydraulic pipeline enters the interior of the tailstock 1 through the rectangular opening 91 and is connected with the oil cylinder 2, and when the oil cylinder 2 is disassembled or maintained, the side cover plate 9 is only required to be opened.

In order to achieve the purpose, the invention also provides a crossheading scraper elevating conveyor which is provided with the single-cylinder built-in telescopic tail. The crossheading scraper elevating conveyor comprises the single-cylinder built-in telescopic tail, so that the technical effect is achieved, and the details are not repeated.

The foregoing detailed description of the invention with reference to preferred embodiments is illustrative rather than limiting in form. On reading the description of the 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 scope of the technical solutions of the embodiments of the present invention.