Chain tensioning structure of scraper

Abstract

The utility model discloses a scraper chain tensioning structure which comprises a shell, the inner wall of the shell is rotatably connected with a threaded rod, the front side of the shell is fixedly provided with a first motor through bolts, the surface of the threaded rod is in threaded connection with two symmetrically-arranged threaded rings, the left side of the shell is fixedly provided with a box body, and the box body is fixedly provided with a second motor. A U-shaped frame is arranged in an inner cavity of the shell. Through droop when the chain is loosened, the transverse rod drives the vertical rod to move downwards and does not press the touch control switch any more, then the touch control switch is connected and starts the first motor, the first motor drives the U-shaped frame to move rightwards through cooperation of the threaded rod, the threaded ring and the connecting rod, and therefore the U-shaped frame drives the gear on the right side to move through the sliding block and tightens the chain. Therefore, the purposes that the touch switch is switched on through falling when the chain is loosened, then the motor drives the driven gear to move and drives the rack to be tensioned, and then the chain tension adjusting convenience is improved are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of raw coal transportation, in particular to a chain tensioning structure of a scraper conveyor. Background Art

[0002] Scraper conveyor is a device that uses scraper chains to transport bulk materials in a trough. It is widely used in the transportation of raw coal in coal mines. Scraper conveyor can transport bulk raw coal to a designated location for easy collection and transportation.

[0003] A prominent problem with scraper conveyors is that the chain becomes loose after a period of use. Once the chain becomes loose, problems such as chain jamming, chain jumping, chain breaking, and chain falling off the track may occur, causing the conveyor to be unable to operate normally. The most common method is to use two lead screws to adjust the tightness of the chain. This type of chain tensioning adjustment requires frequent operation and is relatively inconvenient. Therefore, a scraper conveyor chain tensioning structure is required. The touch switch can be turned on by the drop of the chain when it is loose, so that the motor drives the driven gear to move and drive the rack to tighten, thereby improving the convenience of chain tension adjustment. Utility Model Content

[0004] The purpose of the utility model is to provide a scraper chain tensioning structure, which turns on the touch switch by the drop of the chain when it is loose, so that the motor drives the driven gear to move and drive the rack to tighten, thereby improving the convenience of chain tension adjustment to solve the technical problems raised by the above-mentioned background technology.

[0005] The technical solution of the utility model for solving the above-mentioned technical problems is as follows: a scraper chain tensioning structure comprises a shell: the inner wall of the shell is rotatably connected to a threaded rod, and a motor is fixedly installed on the front side of the shell by bolts, and the surface of the threaded rod is threadedly connected to two symmetrically arranged threaded rings, and a box is fixedly installed on the left side of the shell, and a U-shaped frame is provided in the inner cavity of the shell, and a connecting rod is rotatably connected between the U-shaped frame and the threaded ring through a rotating shaft, and the end of the U-shaped frame passes through the inner cavity of the box and is fixedly connected with a slider, the surface of the slider and the inner wall of the box are rotatably connected with a gear, and a chain is commonly connected by transmission between the two gears, and a rectangular sleeve is fixedly installed on the front side of the box by bolts, and a vertical rod is slidably connected to the inner wall of the rectangular sleeve, and a cross bar is provided on the surface of the vertical rod, and a touch switch is fixedly installed on the front side of the box, and the top of the vertical rod is against the touch switch.

[0006] Preferably, the output shaft of the motor 1 passes through the inner cavity of the shell and is fixedly connected to the threaded rod via a flange, and the threaded rod is a bidirectional threaded rod.

[0007] Preferably, the U-shaped frame and the sliding block are both slidably connected to the box body, and a sliding groove adapted to the sliding block is provided on the inner wall of the box body.

[0008] Preferably, a plurality of scrapers are fixedly connected to the surface of the chain by bolts, and a second motor is fixedly installed on the front side of the box by bolts, and the output shaft of the second motor passes through the inner cavity of the box and is fixedly connected to the gear on the left side.

[0009] Preferably, the top and bottom of the box body are respectively connected to a feed hopper and a discharge hopper.

[0010] Preferably, the front end of the cross bar is rotatably connected to the vertical bar, the rear end of the cross bar extends to the inner cavity of the box, the front side of the box is provided with a rectangular groove adapted to the cross bar, and the bottom of the slider fits with the top of the chain.

[0011] 1. The beneficial effect of the utility model is that the utility model can achieve the following: the horizontal bar drives the vertical bar to move downward and no longer press the touch switch through the sagging of the chain when it is loose, and then the touch switch is turned on and the motor 1 is turned on, and then the motor 1 drives the U-shaped frame to move right through the cooperation of the threaded rod, the threaded ring and the connecting rod, so that the U-shaped frame drives the gear on the right side to move and tighten the chain through the slider, so that the touch switch is turned on through the sagging of the chain when it is loose, and then the motor drives the driven gear to move and drive the rack to tighten, thereby improving the convenience of chain tension adjustment.

[0012] 2. The utility model limits the movement of the slider on the inner wall of the box by setting the slide groove, thereby avoiding the slider from shaking during the movement and improving the stability of the slider.

[0013] 3. The utility model uses the rotation setting of the cross bar to enable the chain to drive the cross bar to rotate during the transmission process, thereby avoiding the situation where the chain causes greater wear on the surface of the cross bar during the movement of the bottom of the cross bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] in:

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0016] Figure 2 This is a three-dimensional cross-sectional schematic diagram of a shell and a box body of an embodiment of the utility model;

[0017] Figure 3 This is an embodiment of the utility model Figure 2 A partial enlarged view of point A;

[0018] Figure 4 The figure is a three-dimensional schematic diagram of a cross bar and a touch switch according to an embodiment of the utility model.

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0020] 1. Shell, 2. Threaded rod, 3. Motor 1, 4. Threaded ring, 5. Box, 6. U-shaped frame, 7. Connecting rod, 8. Slider, 9. Slide, 10. Gear, 11. Chain, 12. Scraper, 13. Motor 2, 14. Feed hopper, 15. Discharge hopper, 16. Rectangular sleeve, 17. Vertical rod, 18. Horizontal rod, 19. Touch switch. DETAILED DESCRIPTION

[0021] Hereinafter, embodiments of the chain tensioning structure of a scraper conveyor of the present invention will be described with reference to the accompanying drawings.

[0022] Embodiment 1:

[0023] Figure 1-4 A scraper chain tensioning structure of an embodiment of the utility model is shown, which includes a shell 1: a threaded rod 2 is rotatably connected to the inner wall of the shell 1, a motor 3 is fixedly installed on the front side of the shell 1 by bolts, the output shaft of the motor 3 passes through the inner cavity of the shell 1 and is fixedly connected to the threaded rod 2 by a flange, the threaded rod 2 is a bidirectional threaded rod, and the surface of the threaded rod 2 is threadedly connected to two symmetrically arranged threaded rings 4, a box 5 is fixedly installed on the left side of the shell 1, a U-shaped frame 6 is provided in the inner cavity of the shell 1, a connecting rod 7 is rotatably connected to the U-shaped frame 6 and the threaded ring 4 by a rotating shaft, the end of the U-shaped frame 6 passes through the inner cavity of the box 5 and is fixedly connected with a slider 8, the U-shaped frame 6 and the slider 8 are both slidably connected to the box 5, and a slide groove 9 adapted to the slider 8 is provided on the inner wall of the box 5. , the movement of the slider 8 on the inner wall of the box body 5 is limited, the shaking of the slider 8 during the movement is avoided, and the stability of the slider 8 is improved. The surface of the slider 8 and the inner wall of the box body 5 are rotatably connected with a gear 10, and a chain 11 is commonly connected with the two gears 10. A plurality of scrapers 12 are fixedly connected to the surface of the chain 11 by bolts. A motor 2 13 is fixedly installed on the front side of the box body 5 by bolts. The output shaft of the motor 2 13 penetrates the inner cavity of the box body 5 and is fixedly connected to the gear 10 on the left side. A rectangular sleeve 16 is fixedly installed on the front side of the box body 5 by bolts. A vertical rod 17 is slidably connected to the inner wall of the rectangular sleeve 16. A cross bar 18 is arranged on the surface of the vertical rod 17. A touch switch 19 is fixedly installed on the front side of the box body 5, and the top of the vertical rod 17 is against the touch switch 19.

[0024] Embodiment 2:

[0025] Figure 1-4A chain tensioning structure of a scraper conveyor according to an embodiment of the utility model is shown, which comprises a shell 1: a threaded rod 2 is rotatably connected to the inner wall of the shell 1, a motor 3 is fixedly installed on the front side of the shell 1 by bolts, two symmetrically arranged threaded rings 4 are threadedly connected to the surface of the threaded rod 2, a box 5 is fixedly installed on the left side of the shell 1, a U-shaped frame 6 is arranged in the inner cavity of the shell 1, a connecting rod 7 is rotatably connected between the U-shaped frame 6 and the threaded ring 4 by a rotating shaft, an end of the U-shaped frame 6 passes through the inner cavity of the box 5 and is fixedly connected with a slider 8, a gear 10 is rotatably connected to the surface of the slider 8 and the inner wall of the box 5, a chain 11 is commonly connected to the two gears 10, and a feed hopper 14 and a discharge hopper 1 are respectively connected to the top and bottom of the box 5. 5. A rectangular sleeve 16 is fixedly installed on the front side of the box body 5 by bolts, and a vertical rod 17 is slidably connected to the inner wall of the rectangular sleeve 16. A cross bar 18 is arranged on the surface of the vertical rod 17. A touch switch 19 is fixedly installed on the front side of the box body 5. The top of the vertical rod 17 abuts against the touch switch 19, and the front end of the cross bar 18 is rotatably connected to the vertical rod 17. The rear end of the cross bar 18 extends to the inner cavity of the box body 5. A rectangular groove adapted to the cross bar 18 is opened on the front side of the box body 5. The bottom of the slider 8 fits with the top of the chain 11. The chain 11 is driven to rotate the cross bar 18 during the transmission process by the rotation setting of the cross bar 18, thereby avoiding the situation that the chain 11 causes greater surface wear of the latter during the movement of the bottom of the cross bar 18.

[0026] Working principle: When the utility model is used, the user pours the raw coal into the inner cavity of the box body 5 through the feed hopper 14, then turns on the motor 13 and drives the chain 11 through the gear 10, and then the chain 11 scrapes the raw coal at the bottom of the inner cavity of the box body 5 through the scraper 12 and discharges it through the discharge hopper 15. If the chain 11 loosens and falls and no longer supports the cross bar 18, the cross bar 18 drives the vertical bar 17 to move downward and no longer presses the touch switch 19, and then the touch switch 19 is turned on and the motor 3 is turned on. At this time, under the limiting action of the U-shaped frame 6 and the connecting rod 7, the motor 3 is driven by the screw The threaded rod 2 drives the two threaded rings 4 to move oppositely, and then the threaded ring 4 drives the U-shaped frame 6 to move right through the connecting rod 7, so that the U-shaped frame 6 drives the gear 10 on the right side to move through the slider 8 and tighten the chain 11. As the chain 11 is tightened and its top is horizontal, the chain 11 drives the cross bar 18 and the vertical bar 17 to move upward and press the touch switch 19 again. At this time, the touch switch 19 is powered off and the motor 3 is turned off, so that the touch switch is turned on by the drop of the chain when it is loose, so that the motor drives the driven gear to move and drives the rack to tighten, thereby improving the convenience of chain tension adjustment.

[0027] To sum up: the chain tensioning structure of the scraper conveyor, through the sagging of the chain 11 when it is loose, the cross bar 18 drives the vertical bar 17 to move downward and no longer presses the touch switch 19, and then the touch switch 19 is turned on and the motor 3 is turned on, and then the motor 3 drives the U-shaped frame 6 to move right through the cooperation of the threaded rod 2, the threaded ring 4 and the connecting rod 7, so that the U-shaped frame 6 drives the gear 10 on the right side to move through the slider 8 and tighten the chain 11, so that the touch switch is turned on by the falling of the chain when it is loose, and then the motor drives the driven gear to move and drive the rack to tighten, thereby improving the convenience of chain tension adjustment.

Claims

1. The chain tensioning structure of the scraper conveyor is characterized by: The invention comprises a housing (1), wherein a threaded rod (2) is rotatably connected to the inner wall of the housing (1), a motor (3) is fixedly installed on the front side of the housing (1) by means of bolts, two symmetrically arranged threaded rings (4) are threadedly connected to the surface of the threaded rod (2), a box (5) is fixedly installed on the left side of the housing (1), a U-shaped frame (6) is arranged in the inner cavity of the housing (1), a connecting rod (7) is rotatably connected between the U-shaped frame (6) and the threaded ring (4) by means of a rotating shaft, and the end of the U-shaped frame (6) penetrates into the inner cavity of the box (5) and is fixedly connected to the threaded ring (4). A slider (8) is connected, the surface of the slider (8) and the inner wall of the box body (5) are both rotatably connected with a gear (10), the two gears (10) are commonly connected with a chain (11) for transmission, a rectangular sleeve (16) is fixedly installed on the front side of the box body (5) by bolts, the inner wall of the rectangular sleeve (16) is slidably connected with a vertical rod (17), the surface of the vertical rod (17) is provided with a cross rod (18), a touch switch (19) is fixedly installed on the front side of the box body (5), and the top end of the vertical rod (17) abuts against the touch switch (19).

2. The chain tensioning structure of the scraper conveyor according to claim 1, characterized in that: The output shaft of the motor 1 (3) passes through the inner cavity of the housing (1) and is fixedly connected to the threaded rod (2) via a flange; the threaded rod (2) is a bidirectional threaded rod.

3. The chain tensioning structure of the scraper conveyor according to claim 2, characterized in that: The U-shaped frame (6) and the sliding block (8) are both slidably connected to the box body (5), and the inner wall of the box body (5) is provided with a sliding groove (9) adapted to the sliding block (8).

4. The chain tensioning structure of the scraper conveyor according to claim 3, characterized in that: A plurality of scrapers (12) are fixedly connected to the surface of the chain (11) by means of bolts, and a second motor (13) is fixedly installed on the front side of the housing (5) by means of bolts, wherein the output shaft of the second motor (13) passes through the inner cavity of the housing (5) and is fixedly connected to the gear (10) on the left side.

5. The chain tensioning structure of the scraper conveyor according to claim 4, characterized in that: The top and bottom of the box body (5) are respectively connected to a feed hopper (14) and a discharge hopper (15).

6. The chain tensioning structure of the scraper conveyor according to claim 5, characterized in that: The front end of the cross bar (18) is rotatably connected to the vertical bar (17), and the rear end of the cross bar (18) extends to the box. The inner cavity of the box body (5), the front side of the box body (5) is provided with a rectangular groove adapted to the cross bar (18), The bottom of the slider (8) fits the top of the chain (11).

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