Electric tensioning device at the tail of scraper

Abstract

This application relates to the field of conveying equipment technology, and in particular to an electric tensioning device for the tail of a scraper conveyor, including a frame and a tail wheel assembly. Movable frames for mounting the tail wheel assembly are slidably mounted on both sides of the frame. The movable frames are connected to the tail wheel assembly via a rotating structure. Vertical supports are fixedly mounted on the frame on both sides of the movable frames. A tensioning screw and a tensioning screw are fixedly mounted on the left and right sides of the movable frames, respectively. By setting two screws on the left and right sides of the movable frames—one for pulling the movable frames and the other for tightening them—the burden on a single worm gear reducer is reduced. After adjustment, the two locking nuts on the left and right sides are tightened to engage with one side of the vertical plate, transmitting the tension and thrust through the vertical supports to the frame. This protects the worm gear reducer, extends its service life, increases structural stability, and prevents safety accidents caused by breakage or pull-out of its output shaft.

Description

Technical field:

[0001] The present application relates to the technical field of conveying equipment, and in particular to an electric tensioning device at the tail of a scraper conveyor. Background technology:

[0002] The scraper is a transport machine used in coal mining working faces. It is mainly used for coal mining working faces and mining area chute transportation. It can also be used in coal tunnels and semi-coal rock tunnel excavation working faces. It can transport upwards and downwards. The upward transport is generally not more than 35 degrees; the downward transport is generally not more than 25 degrees, and it is better not to exceed 20 degrees in practice.

[0003] Our company's Chinese utility model patent application number 202322036941.8 is a manual winch tensioning device for conveying equipment, including a bracket, the bracket is provided with a driving wheel and a steering wheel in a rotating structure, the driving wheel and the steering wheel are connected through a conveying member, two slides are respectively connected to the bracket in a sliding structure, and the steering wheel is connected to the slide through a rotating structure, two worm gear reduction boxes are respectively arranged on the bracket in a fixed structure, the drum is fixedly connected to the worm input shaft of the worm gear reduction box, the two ends of the wire rope are respectively fixedly connected to the drum and the slide on the same side, the ratchet wrench is fixedly connected to the worm of the worm gear reduction box, the worm gear reduction box is provided to drive the drum to rotate, the slide and the steering wheel are pulled by the wire rope to rotate, so that the distance between the steering wheel and the driving wheel is increased, and then the tension of the conveying member is adjusted, the mechanical structure is adopted, the structure is simple, the stability is good, and the reliability and safety of the tensioning device are increased.

[0004] This patent utilizes a worm gear reducer to drive the drum to rotate. The drum is wrapped with a steel wire rope to pull the slide toward the drum, which in turn pulls the steering wheel away from the driving wheel to tension the conveyor. The tensioning force of this patented structure is ultimately transmitted to the output shaft of the worm gear reducer through the drum, which can easily cause damage to the worm gear reducer and reduce its service life. In severe cases, it can cause the output shaft to break, posing certain safety hazards. Utility model content:

[0005] In order to solve the above technical problems, the utility model provides an electric tensioning device at the tail of a scraper, and solves the technical problem that the tensioning force acts on the output shaft of the worm gear reducer, which easily causes damage to the worm gear reducer, reduces its service life, and in severe cases causes the output shaft to break, which poses certain safety hazards. In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] The electric tensioning device at the tail of the scraper conveyor includes:

[0007] The frame and the tail wheel assembly are provided with a movable frame for installing the tail wheel assembly on both sides of the frame in a sliding structure, and the movable frame is connected to the tail wheel assembly in a rotating structure;

[0008] A stand, which is arranged on the racks on both sides of the mobile rack in a fixed structure manner;

[0009] The jacking screw rod and the tension screw rod are respectively arranged on the left and right sides of the mobile frame in a fixed structure, and the jacking screw rod and the tension screw rod both pass through the vertical frame and extend outward;

[0010] A left locking nut, the left locking nut is connected to the tightening screw rod by thread engagement, and the left locking nut is located on the inner side of the left stand;

[0011] A right locking nut, the right locking nut is connected to the tension screw rod by thread engagement, and the right locking nut is located outside the right stand;

[0012] Sleeves, the two sleeves are respectively connected with the ends of the tension screw rod and the tension screw rod away from the moving frame by threaded engagement;

[0013] A worm gear reduction box, wherein the worm gear reduction box is connected to the frame in a fixed structural manner, and an output shaft of the worm gear reduction box is connected to the sleeve in a fixed structural manner;

[0014] The reduction motor, the reduction motor output shaft is connected to the worm gear reduction box input shaft.

[0015] Furthermore, the frame is provided with a linear guide rail connected to the movable frame in a fixed structure manner, and the linear guide rail is arranged on the upper and lower end surfaces of the movable frame.

[0016] Furthermore, the left and right sides of the movable frame are connected with fixed blocks by bolts, a rectangular cavity is provided in the fixed block, a fixed block is embedded in the rectangular cavity, and the outer facade of the fixed block is connected to the tightening screw rod and one end of the tension screw rod in a fixed structural manner.

[0017] Furthermore, the moving frame includes an upper frame and a lower frame connected by bolts.

[0018] Furthermore, screw protection sleeves are provided on the outside of the tightening screw rod and the tension screw rod.

[0019] The beneficial effect of the utility model is that two lead screws are arranged on the left and right sides of the moving frame, one is used to pull the moving frame, and the other is used to tighten the moving frame. After the adjustment is completed, the two locking nuts on the left and right are screwed to fit on one side of the vertical plate, and the pulling force and the thrust are transmitted to the frame through the vertical frame, so as to protect the worm gear reduction box, improve the service life of the worm gear reduction box, increase the structural stability, and avoid safety accidents caused by the breakage or pulling out of its output shaft.

[0020] In order to ensure the fixed connection between the screw rod and the movable frame, a rectangular cavity is provided in the end cover to limit the rotation of the fixed block. The split structure design facilitates the assembly of the screw rod and the replacement of the worn screw rod, thereby improving the efficiency of installation and maintenance.

[0021] By arranging the lead screw protective cover, the lead screw is protected from pollution and damage by dust and coal slime. Description of the drawings:

[0022] Figure 1 It is a main structural schematic diagram of the utility model.

[0023] Figure 2 It is a right-side structural schematic diagram of the utility model.

[0024] In the figure:

[0025] 1. Frame, 2. Tail wheel assembly, 3. Mobile frame, 31. Upper frame, 32. Lower frame, 4. Screw, 5. Left locking nut, 6. Sleeve, 7. Worm gear reducer, 8. Reducer motor, 9. Linear guide, 10. Fixed block, 11. End cover, 12. Screw protective cover, 13. Vertical frame, 14. Tension screw, 15. Right locking nut. Specific implementation method:

[0026] In order to make the purpose, technical scheme and advantages of the implementation of the utility model clearer, the utility model will now be further described in detail with reference to the accompanying drawings and the following examples so that the public can better understand the implementation method of the utility model. The specific implementation scheme of the utility model is as follows:

[0027] The electric tensioning device at the tail of the scraper comprises a frame 1 and a tail wheel assembly 2. A moving frame 3 for installing the tail wheel assembly 2 is arranged on both sides of the frame 1 in a sliding structure manner. The moving frame 3 is connected to the tail wheel assembly 2 in a rotating structure manner. A vertical frame 13 is arranged on the frame 1 on both sides of the moving frame 3 in a fixed structure manner. A tensioning screw rod 4 and a tensioning screw rod 14 are arranged on the left and right sides of the moving frame 3 in a fixed structure manner, and the tensioning screw rod 4 and the tensioning screw rod 14 both extend outward through the vertical frame 13. The tensioning screw rod 4 is provided with a left and right screw rod 13 in a threaded engagement manner. Locking nut 5, left locking nut 5 is located inside the left stand 13, tension screw 14 is provided with right locking nut 15 by threaded engagement, right locking nut 15 is located outside the right stand 13, tightening screw 4, tension screw 14 are provided with sleeve 6 at one end away from the mobile stand 3 by threaded engagement, the frame 1 outside the sleeve 6 is provided with worm gear reducer 7 in a fixed structure, the output shaft of worm gear reducer 7 is connected with sleeve 6 in a fixed structure, and the output shaft of reduction motor 8 is connected with the input shaft of worm gear reducer 7. By arranging two lead screws on the left and right of the mobile stand, one is used to pull the mobile stand and the other is used to tighten the mobile stand, the burden of a single worm gear reducer is reduced; after the adjustment is completed, the left and right locking nuts are screwed to fit on one side of the vertical plate, and the pulling force and thrust are transmitted to the frame through the stand to protect the worm gear reducer, improve the service life of the worm gear reducer, increase the structural stability, and avoid safety accidents caused by the breakage or pulling out of its output shaft.

[0028] It should be noted that the frame 1 is provided with a linear guide rail 9 connected to the moving frame 3 in a fixed structure manner, and the linear guide rail 9 is arranged on the upper and lower end surfaces of the moving frame 3, so that the moving frame slides more smoothly.

[0029] Specifically, the left and right sides of the mobile frame 3 are connected with end covers 11 by bolts, and a rectangular cavity is provided in the end cover 11, and a fixing block 10 is embedded in the rectangular cavity. The outer surface of the fixing block 10 is connected with the top screw rod 4 and one end of the tension screw rod 14 in a fixed structure. In order to ensure the fixed connection between the screw rod 4 and the mobile frame 3, the rectangular cavity provided in the end cover 11 is used to limit the rotation of the fixing block 10. The split structure design facilitates the assembly of the screw rod 4 and the replacement of the worn screw rod 4, thereby improving the work efficiency of installation and maintenance.

[0030] It should be explained that the mobile frame 3 includes an upper frame 31 and a lower frame 32 connected by bolts, so as to facilitate the assembly and maintenance of the tail wheel assembly 2.

[0031] Furthermore, the outer parts of the tightening screw rod 4 and the tension screw rod 14 are both covered with screw rod protection sleeves 12, so that the screw rods are not polluted or damaged by dust and coal slime.

[0032] The working principle and working process of the utility model are as follows:

[0033] When the tension of the scraper needs to be adjusted, the reduction motors 8 on the left and right sides are started at the same time, wherein the reduction motor 8 on the left side drives the sleeve 6 to rotate through the left worm gear reduction box 7, so that the tension screw 4 extends out of the sleeve 6 and applies thrust to the moving frame 3; and the reduction motor 8 on the right side drives the sleeve 6 to rotate through the right worm gear reduction box 7, so that the tension screw 14 retracts into the sleeve 6 and applies tension to the moving frame 3. Under the joint action of the tension screw 4 and the tension screw 14, the moving frame 3 moves to the right to tighten the scraper chain. After reaching the predetermined tension, the left locking nut 5 is turned to the right side of the left stand 13, and the right locking nut 15 is turned to the right side of the right stand 13 to lock it, and the force is transmitted to the frame 1 through the stand 13 to complete the operation.

[0034] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "front", "back", "lower left", "upper right", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Although the present invention has been described according to a limited number of embodiments, those skilled in the art, with the benefit of the above description, should understand that other embodiments can be conceived within the scope of the present invention described thereby.

Claims

1. The electric tensioning device at the tail of the scraper conveyor is characterized by: include: A frame (1) and a tail wheel assembly (2), wherein a movable frame (3) for mounting the tail wheel assembly (2) is arranged on both sides of the frame (1) in a sliding structure manner, and the movable frame (3) is connected to the tail wheel assembly (2) in a rotating structure manner; A stand (13), the stand (13) being arranged on the frame (1) on both sides of the moving frame (3) in a fixed structure manner; A tensioning screw rod (4) and a tensioning screw rod (14), wherein the tensioning screw rod (4) and the tensioning screw rod (14) are respectively arranged on the left and right sides of the movable frame (3) in a fixed structure manner, and the tensioning screw rod (4) and the tensioning screw rod (14) both pass through the vertical frame (13) and extend outwards; A left locking nut (5), the left locking nut (5) is connected to the tightening screw rod (4) by threaded engagement, and the left locking nut (5) is located on the inner side of the left stand (13); A right locking nut (15), the right locking nut (15) is connected to the tension screw rod (14) by threaded engagement, and the right locking nut (15) is located outside the right side stand (13); Sleeves (6), the two sleeves (6) are respectively connected to the ends of the tension screw rod (4) and the tension screw rod (14) away from the movable frame (3) by means of threaded engagement; A worm gear reduction box (7), the worm gear reduction box (7) is connected to the frame (1) in a fixed structural manner, and the output shaft of the worm gear reduction box (7) is connected to the sleeve (6) in a fixed structural manner; A reduction motor (8), the output shaft of which is connected to the input shaft of the worm gear reduction box (7).

2. The electric tensioning device at the tail of a scraper according to claim 1, characterized in that: The frame (1) is provided with a linear guide rail (9) connected to the moving frame (3) in a fixed structure manner, and the linear guide rail (9) is arranged on the upper and lower end surfaces of the moving frame (3).

3. The electric tensioning device at the tail of a scraper according to claim 1, characterized in that: The left and right sides of the mobile frame (3) are both connected with end covers (11) by bolts, a rectangular cavity is arranged in the end cover (11), a fixing block (10) is embedded in the rectangular cavity, and the outer surface of the fixing block (10) is connected to the top screw rod (4) and one end of the tension screw rod (14) in a fixed structure manner.

4. The electric tensioning device at the tail of a scraper according to claim 1, characterized in that: The movable frame (3) comprises an upper frame (31) and a lower frame (32) connected by bolts.

5. The electric tensioning device at the tail of a scraper according to claim 1, characterized in that: The outsides of the tightening screw rod (4) and the tension screw rod (14) are both covered with screw rod protection sleeves (12).

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