Telescopic tail of scraper conveyor

Abstract

A machine tail chain wheel assembly is installed on a movable frame body, a sliding groove parallel to a scraper chain is formed in a fixed frame body, the two ends of the movable frame body are installed in the sliding groove in a sliding mode, and a self-locking telescopic oil cylinder is installed between the movable frame body and the fixed frame body. The self-locking telescopic oil cylinder can push the movable frame body to move along the sliding groove, and when the movable frame body drives the machine tail chain wheel assembly to move to a preset position, the self-locking telescopic oil cylinder is self-locked. The bottom end of the piston rod is fixedly connected with the piston, the piston rod and the piston divide an inner cavity of the cylinder body into a liquid inlet cavity and a liquid return cavity, a liquid inlet and a liquid return opening are formed in the cylinder body, the liquid inlet is communicated with the liquid inlet cavity, the liquid return opening is communicated with the liquid return cavity, and a threaded section is arranged on the upper portion of the piston rod and is in threaded connection with a locking nut. And the locking nut is positioned above the cylinder body. According to the telescopic tail of the scraper conveyor, stepless adjustment of the length of a chain can be achieved when the chain is tensioned, and the telescopic tail is wide in application range.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine fully mechanized mining equipment, in particular to a telescopic tail of a scraper conveyor. Background Art

[0002] In fully mechanized coal mining operations, the scraper chain of a scraper conveyor, connected by a nose and tail sprockets, forms a closed transmission system responsible for transporting coal. After the chain is connected, a certain preload must be applied to the scraper chain. This is achieved by telescoping the nose or tail sprockets to push the chain and apply tension.

[0003] In the prior art, the Chinese patent application number is 202110634310.9, entitled "A Single-Cylinder Built-in Telescopic Tail and Chute Scraper Transfer Machine," which discloses a structure utilizing a telescopic tail to tighten a chain: slideways are provided on the side panels of the tail frame, and the movable frame is installed into the tail frame from the rear through the slideways; connecting plates are provided on both sides of the slideways, and the connecting plates are provided with a plurality of equidistant positioning pin holes; sliders are provided on both sides of the movable frame, and the sliders slide on the slideways on both sides of the tail frame, and connecting plates are provided on the sliders, and the connecting plates and the sliders are welded together, and a plurality of equidistant positioning pin holes are arranged on the connecting plates. When the movable frame telescopically slides, the positioning pin holes on the connecting plates coincide with the positioning pin holes on the connecting plates, and the positioning pins are inserted to fix the tail frame and the movable frame. This telescopic method of locking with a cylinder inserting a positioning pin has a limit on the minimum adjustment length due to the limitation of the distance between adjacent pin holes, and cannot achieve stepless adjustment of the chain length.

[0004] However, for short-distance, high-power scraper conveyors, the chain is large in size, rigid, and has very limited retractable range. Therefore, it is necessary to achieve stepless adjustment of the chain length. The structure of the telescopic tail tightening chain mentioned above cannot meet the requirements. Utility Model Content

[0005] In order to overcome the above-mentioned deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a telescopic tail of a scraper conveyor, which can achieve stepless adjustment of the chain length when the chain is tensioned and has a wide range of applications.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A telescopic tail of a scraper conveyor comprises a movable frame and a fixed frame, wherein a tail sprocket assembly is installed on the movable frame.

[0008] The fixed frame is provided with a sliding groove arranged parallel to the scraper chain, and both ends of the movable frame are slidably installed in the sliding groove. A self-locking telescopic oil cylinder is installed between the movable frame and the fixed frame. The self-locking telescopic oil cylinder can push the movable frame to move along the sliding groove. When the movable frame drives the tail sprocket assembly to move to a predetermined position, the self-locking telescopic oil cylinder is self-locking;

[0009] The self-locking telescopic oil cylinder includes a cylinder body, a piston rod and a piston. The bottom end of the piston rod is fixedly connected to the piston. The piston rod and the piston divide the inner cavity of the cylinder body into a liquid inlet cavity and a liquid return cavity. The cylinder body is provided with a liquid inlet and a liquid return port. The liquid inlet is communicated with the liquid inlet cavity, and the liquid return port is communicated with the liquid return cavity.

[0010] The upper portion of the piston rod is configured as a threaded section, the threaded section of the piston rod is threadedly connected with a locking nut, and the locking nut is located above the cylinder body.

[0011] Preferably, the fixed frame includes a fixed side plate, the sliding groove is provided on the fixed side plate, and the sliding groove is arranged parallel to the scraper chain.

[0012] Preferably, the fixed frame is fixed with a first connecting ear, the movable frame is fixed with a second connecting ear, the bottom end of the cylinder body of the self-locking telescopic cylinder is hinged to the first connecting ear, and the protruding end of the piston rod is hinged to the second connecting ear.

[0013] Preferably: a cylinder connecting ear is provided at the bottom end of the cylinder body, a piston rod connecting ear is provided at the protruding end of the piston rod, corresponding first pin holes are provided on the cylinder connecting ear and the first connecting ear, corresponding second pin holes are provided on the hinge between the piston rod connecting ear and the second connecting ear, a first connecting pin passes through the first pin hole to connect the cylinder connecting ear and the first connecting ear on the fixed frame, and a second connecting pin passes through the second pin hole to connect the piston rod connecting ear and the second connecting ear on the movable frame.

[0014] Preferably: after the hydraulic pump station supplies liquid to the self-locking telescopic cylinder, the liquid enters the liquid inlet chamber from the liquid inlet, the liquid in the liquid inlet chamber pushes the piston rod to extend, and the piston rod pushes the movable frame to move along the sliding groove of the fixed frame. When the movable frame drives the tail sprocket assembly to a predetermined position, the locking nut is rotated back to the top of the cylinder body, and the piston rod of the self-locking telescopic cylinder is restricted in the predetermined position, so that the self-locking telescopic cylinder is self-locking.

[0015] Preferably, a sealing member is provided between the inner cavity of the cylinder body and the piston rod, and the sealing member is located in the liquid return cavity.

[0016] Preferably, the tail sprocket assembly includes a tail sprocket, a central shaft passing through the tail sprocket and extending at both ends, bearing mounting seats are fixedly provided at both ends of the central shaft, the tail sprocket rotates around the central shaft, and the bearing mounting seats are fixedly connected to the movable frame.

[0017] Preferably, a tongue plate is fixed on the movable frame, and the tongue plate is connected to a derailleur assembly.

[0018] After adopting the above technical solution, the beneficial effects of the utility model are:

[0019] The utility model provides a telescopic tail of a scraper conveyor, comprising a movable frame and a fixed frame, wherein a tail sprocket assembly is installed on the movable frame, a sliding groove arranged parallel to the scraper chain is provided on the fixed frame, both ends of the movable frame are slidably installed in the sliding groove, a self-locking telescopic oil cylinder is installed between the movable frame and the fixed frame, the self-locking telescopic oil cylinder can push the movable frame to move along the sliding groove, and the self-locking telescopic oil cylinder is self-locking when the movable frame drives the tail sprocket assembly to move to a predetermined position.

[0020] When the chain slackens, the hydraulic pump station supplies fluid to the self-locking telescopic cylinder. Liquid enters the inlet chamber through the inlet port, pushing the piston rod out. The piston rod then pushes the movable frame along the sliding groove of the fixed frame. When the movable frame drives the tail sprocket assembly to the desired position, the chain tightens, rotating the locking nut back to the top of the cylinder body. This confines the piston rod to the desired position, thereby locking the cylinder. After the pressure is released from the self-locking telescopic cylinder, the locking nut tightens, confining the piston rod to the desired position, achieving self-locking. Furthermore, because the threaded section of the piston rod is threadedly connected to the locking nut, the position of the locking nut on the threaded section of the piston rod can be adjusted, allowing for arbitrary adjustment of the piston rod extension, achieving stepless regulation and a wide range of applications.

[0021] In summary, the telescopic tail of the scraper conveyor of the utility model can achieve stepless adjustment of the chain length when the chain is tensioned, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of the telescopic tail of the scraper conveyor of the utility model;

[0023] Figure 2 yes Figure 1 Schematic diagram of the telescopic tail of the middle scraper conveyor with one fixed side plate hidden;

[0024] Figure 3 yes Figure 2 Schematic diagram of the structure of the self-locking telescopic cylinder;

[0025] In the picture:

[0026] 1. Movable frame; 101. Tongue plate; 2. Fixed frame; 200. Fixed side plate; 201. Sliding groove; 202. First connecting ear; 203. Second connecting ear; 3. Self-locking telescopic cylinder; 301. Cylinder body; 3011. Cylinder body connecting ear; 302. Piston rod; 3021. Piston rod connecting ear; 303. Piston; 3031. Liquid inlet chamber; 3032. Liquid return chamber; 3033. Liquid inlet port; 3034. Liquid return port; 4. Locking nut; 5. Tail sprocket assembly; 501. Tail sprocket; 502. Center shaft; 503. Bearing mounting seat; 6. Seal. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0028] The embodiment of the present utility model discloses Figure 1 The telescopic tail of the scraper conveyor shown in the figure includes a movable frame 1 and a fixed frame 2. A tail sprocket assembly 5 is installed on the movable frame 1. A sliding groove 201 is provided on the fixed frame 2 and is arranged parallel to the scraper chain. Both ends of the movable frame 1 are slidably installed in the sliding groove 201. A self-locking telescopic cylinder 3 is installed between the movable frame 1 and the fixed frame 2. The self-locking telescopic cylinder 3 can push the movable frame 1 to move along the sliding groove 201. When the movable frame 1 drives the tail sprocket assembly 5 to move to a predetermined position, the self-locking telescopic cylinder 3 is self-locking.

[0029] like Figure 3 As shown, the self-locking telescopic oil cylinder 3 includes a cylinder body 301, a piston rod 302 and a piston 303. The bottom end of the piston rod 302 is fixedly connected to the piston 303. The piston rod 302 and the piston 303 separate the inner cavity of the cylinder body 301 into a liquid inlet cavity 3031 and a liquid return cavity 3032. The cylinder body 301 is provided with a liquid inlet 3033 and a liquid return cavity 3034. The liquid inlet 3033 is connected to the liquid inlet cavity 3031, and the liquid return cavity 3034 is connected to the liquid return cavity 3032.

[0030] The upper portion of the piston rod 302 is provided as a threaded section, and the threaded section of the piston rod 302 is threadedly connected to a locking nut 4 , which is located above the cylinder body 301 .

[0031] In some embodiments, as Figure 2 As shown, the fixed frame 2 includes a fixed side plate 200 , a sliding groove 201 is provided on the fixed side plate 200 , and the sliding groove 201 is arranged parallel to the scraper chain.

[0032] In some embodiments, the fixed frame 2 is fixed with a first connecting ear 202, the movable frame 1 is fixed with a second connecting ear 203, one end of the self-locking telescopic cylinder 3 is hinged to the first connecting ear 202, and the extended end of the piston rod 302 is hinged to the second connecting ear 203.

[0033] In some embodiments, a cylinder connecting ear 3011 is provided at the bottom end of the cylinder body 301, and a piston rod connecting ear 3021 is provided at the protruding end of the piston rod 302. Corresponding first pin holes are provided on the cylinder connecting ear 3011 and the first connecting ear 202, and corresponding second pin holes are provided on the hinge of the piston rod connecting ear 3021 and the second connecting ear 203. The first connecting pin passes through the first pin hole to connect the cylinder connecting ear 3011 and the first connecting ear 202 on the fixed frame 2, and the second connecting pin passes through the second pin hole to connect the piston rod connecting ear 3021 and the second connecting ear 203 on the movable frame 1.

[0034] like Figure 3 As shown, after the hydraulic pump station supplies liquid to the self-locking telescopic oil cylinder 3, the liquid enters the liquid inlet chamber 3031 from the liquid inlet port 3033. The liquid in the liquid inlet chamber 3031 pushes the piston rod 302 to extend, and the piston rod 302 pushes the movable frame 1 to move along the sliding groove 201 of the fixed frame 2. When the movable frame 1 drives the tail sprocket assembly 5 to move to the predetermined position, the locking nut 4 is rotated to the top of the cylinder body 301, and the piston rod 302 of the self-locking telescopic oil cylinder 3 is restrained in the predetermined position, thereby self-locking the self-locking telescopic oil cylinder 3. After the self-locking telescopic oil cylinder 3 is depressurized, the piston rod 302 of the self-locking telescopic oil cylinder 3 is restrained in the predetermined position due to the tightening effect of the locking nut 4, and the self-locking telescopic oil cylinder 3 is self-locking. And because the threaded section of the piston rod 302 is threadedly connected to the locking nut 4, the position of the locking nut 4 on the threaded section of the piston rod 302 can be adjusted, and the extension amount of the piston rod 302 can be adjusted arbitrarily, realizing stepless adjustment and a wide range of applications.

[0035] In some embodiments, a seal 6 is provided between the inner cavity of the cylinder body 301 and the piston rod 302 , and the seal 6 is located in the liquid return cavity 3032 .

[0036] In some embodiments, as Figure 2 As shown, the tail sprocket assembly 5 includes a tail sprocket 501, a central shaft 502 passing through the tail sprocket 501 and extending at both ends, bearing mounting seats 503 are fixedly provided at both ends of the central shaft 502, the tail sprocket 501 rotates around the central shaft 502, and the bearing mounting seats 503 are fixedly connected to the movable frame 1.

[0037] A tongue plate 101 is fixed to the movable frame 1, and the tongue plate 101 is connected to the derailleur assembly. When the self-locking telescopic oil cylinder 3 pushes the movable frame 1 to move, the tail sprocket assembly 5, the tongue plate 101 and the derailleur and other components move with the movable frame 1 to complete the chain tightening task.

[0038] The working principle of the telescopic tail of the scraper conveyor of this utility model is as follows:

[0039] When the chain is loose, the hydraulic pump station supplies fluid to the self-locking telescopic oil cylinder 3, and the piston rod 302 pushes the movable frame 1 to move along the sliding groove 201 of the fixed frame 2. When the movable frame 1 drives the tail sprocket assembly 5 to move to the predetermined position, the chain is tightened, and the locking nut 4 is rotated to the top of the cylinder 301. The piston rod 302 of the self-locking telescopic oil cylinder 3 is restricted to the predetermined position, thereby self-locking the self-locking telescopic oil cylinder 3. After the pressure in the self-locking telescopic oil cylinder 3 is relieved, the piston rod 302 of the self-locking telescopic oil cylinder 3 is restricted to the predetermined position due to the tightening effect of the locking nut 4. The self-locking telescopic oil cylinder 3 is self-locking and prevents the chain from loosening.

[0040] The technical solution of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Those skilled in the art should understand that various changes made thereto in form and details fall within the scope of protection defined by the claims of the present invention.

Claims

1. A telescopic tail of a scraper conveyor, comprising a movable frame and a fixed frame, wherein a tail sprocket assembly is mounted on the movable frame, characterized in that: The fixed frame is provided with a sliding groove arranged parallel to the scraper chain, and both ends of the movable frame are slidably installed in the sliding groove. A self-locking telescopic oil cylinder is installed between the movable frame and the fixed frame. The self-locking telescopic oil cylinder can push the movable frame to move along the sliding groove. When the movable frame drives the tail sprocket assembly to move to a predetermined position, the self-locking telescopic oil cylinder is self-locking; The self-locking telescopic oil cylinder includes a cylinder body, a piston rod and a piston. The bottom end of the piston rod is fixedly connected to the piston. The piston rod and the piston divide the inner cavity of the cylinder body into a liquid inlet cavity and a liquid return cavity. The cylinder body is provided with a liquid inlet and a liquid return port. The liquid inlet is communicated with the liquid inlet cavity, and the liquid return port is communicated with the liquid return cavity. The upper portion of the piston rod is configured as a threaded section, the threaded section of the piston rod is threadedly connected with a locking nut, and the locking nut is located above the cylinder body.

2. The telescopic tail of the scraper conveyor according to claim 1, characterized in that: The fixed frame includes a fixed side plate, the sliding groove is opened on the fixed side plate, and the sliding groove is arranged in parallel with the scraper chain.

3. The telescopic tail of the scraper conveyor according to claim 1, characterized in that: The fixed frame is fixed with a first connecting ear, the movable frame is fixed with a second connecting ear, the bottom end of the cylinder body of the self-locking telescopic cylinder is hinged to the first connecting ear, and the protruding end of the piston rod is hinged to the second connecting ear.

4. The telescopic tail of the scraper conveyor according to claim 3, characterized in that: The bottom end of the cylinder body is provided with a cylinder body connecting ear, and the protruding end of the piston rod is provided with a piston rod connecting ear. Corresponding first pin holes are provided on the cylinder body connecting ear and the first connecting ear, and corresponding second pin holes are provided on the hinge between the piston rod connecting ear and the second connecting ear. The first connecting pin passes through the first pin hole to connect the cylinder body connecting ear and the first connecting ear on the fixed frame, and the second connecting pin passes through the second pin hole to connect the piston rod connecting ear and the second connecting ear on the movable frame.

5. The telescopic tail of the scraper conveyor according to claim 1, characterized in that: After the hydraulic pump station supplies liquid to the self-locking telescopic oil cylinder, the liquid enters the liquid inlet chamber from the liquid inlet port, and the liquid in the liquid inlet chamber pushes the piston rod to extend, and the piston rod pushes the movable frame to move along the sliding groove of the fixed frame. When the movable frame drives the tail sprocket assembly to a predetermined position, the locking nut is rotated back to the top of the cylinder body, and the piston rod of the self-locking telescopic oil cylinder is restricted in the predetermined position, so that the self-locking telescopic oil cylinder is self-locking.

6. The telescopic tail of the scraper conveyor according to claim 1, characterized in that: A sealing member is provided between the inner cavity of the cylinder body and the piston rod, and the sealing member is located in the liquid return cavity.

7. The telescopic tail of the scraper conveyor according to claim 1, characterized in that: The tail sprocket assembly includes a tail sprocket, a central shaft passing through the tail sprocket and extending at both ends, bearing mounting seats are fixedly provided at both ends of the central shaft, the tail sprocket rotates around the central shaft, and the bearing mounting seats are fixedly connected to the movable frame.

8. The telescopic tail of a scraper conveyor according to claim 7, characterized in that: A tongue plate is fixed on the movable frame, and the tongue plate is connected to the derailleur assembly.

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