Automatic tensioning device for ultra-thin coal seam scraper conveyor

Abstract

The utility model discloses an automatic tensioning device for an ultra-thin coal seam scraper conveyor. The automatic tensioning device comprises a shell, a motor, a worm and gear mechanism, a gear and rack mechanism, a transmission rod, a guide groove, a connecting rod, a roller and a tensioning wheel. The motor is connected with the worm and gear mechanism through a shaft, the gear and rack mechanism is connected with the worm and gear mechanism through a transmission rod, the tensioning wheels are symmetrically installed on the roller, and the connecting rods are installed in the guide grooves in the two sides and can linearly move in the guide grooves. The automatic tensioning device can automatically tension and adjust the degree of tightness of the scraper chain in the scraper conveyor, ensures that the chain keeps proper tension degree in the running process of the conveyor, effectively avoids the phenomena of chain clamping and chain breaking, and accordingly ensures stable running of equipment.

Description

Technical Field

[0001] The utility model relates to an automatic tensioning device, in particular to an automatic tensioning device for an ultra-thin coal seam scraper conveyor, belonging to the technical field of coal mining. Background Art

[0002] Generally speaking, a scraper conveyor is a type of material handling equipment widely used in industries such as coal mining, metallurgy, building materials, and chemicals. Its operating principle is to use scrapers attached to the scraper conveyor chain to propel the material along the conveyor trough, completing the material conveyance. Given the limited working space unique to extremely thin coal seams, the design of a scraper conveyor suitable for such seams must fully consider its compact structure. Specifically, such scraper conveyors should adopt a highly integrated and space-optimized design to adapt to narrow working faces and ensure efficient coal mining operations.

[0003] Due to the long-term use of scraper conveyors, the scraper conveyor chain is prone to wear or loosening due to load changes, resulting in reduced conveying efficiency and even failures such as chain tooth jumping and chain derailment. However, the scraper conveyors in the existing technology lack effective automatic tensioning devices, and usually require manual regular adjustment and maintenance of the chain, which increases the workload and downtime of equipment maintenance. Utility Model Content

[0004] The purpose of the present utility model is to provide an automatic tensioning device for an ultra-thin coal seam scraper conveyor in order to solve at least one of the above-mentioned technical problems. The automatic tensioning device can effectively tension and adjust the tightness of the scraper chain in the scraper conveyor, ensuring that the chain maintains appropriate tension during the operation of the conveyor, avoiding the problems of frequent maintenance and increased energy consumption in traditional equipment, thereby ensuring the smooth operation of the equipment and improving work efficiency.

[0005] The utility model achieves the above-mentioned object through the following technical solutions: an automatic tensioning device for an ultra-thin coal seam scraper conveyor, comprising a housing and a motor located inside the housing;

[0006] The motor is connected to the worm gear mechanism through a shaft;

[0007] The worm gear mechanism is connected to the rack and pinion mechanism located outside the housing through a transmission rod;

[0008] A first guide groove and a second guide groove are respectively formed on two side surfaces of the housing, and a connecting rod capable of linear motion is installed in the first guide groove and the second guide groove;

[0009] A rotatable roller is installed on the connecting rod, and a first tensioning wheel and a second tensioning wheel are symmetrically installed on the roller.

[0010] As a further technical solution of the present invention: a first chain slot and a second chain slot are symmetrically installed on both sides of the outer side of the shell; a first support frame and a second support frame are installed in the shell, and a support plate is installed on the upper end surface of the shell.

[0011] As a further technical solution of the utility model: the worm gear mechanism includes a worm wheel and a worm matched with the worm wheel;

[0012] The worm wheel is installed in the middle of the transmission rod, and the worm is installed on the first support frame and the second support frame.

[0013] As a further technical solution of the present invention: the motor is installed below the support plate, and the worm is connected to the rotating shaft of the motor.

[0014] As a further technical solution of the utility model: the rack and pinion mechanism includes a first external gear, a second external gear, a first rack and a second rack;

[0015] The first external gear and the second external gear are symmetrically mounted on both ends of the transmission rod, and the first rack and the second rack are respectively mounted in the first chain groove and the second chain groove.

[0016] As a further technical solution of the present invention: one end of the connecting rod is fixed to one end of the first rack, the other end of the connecting rod is fixed to one end of the second rack, and the other end of the first rack is installed in cooperation with the first external gear, and the other end of the second rack is installed in cooperation with the second external gear.

[0017] The beneficial effects of the utility model are:

[0018] 1) The automatic tensioning device provided by the utility model can automatically adjust the tightness of the chain without manual intervention, ensuring that the chain always maintains an appropriate tension state during operation, avoiding failures such as tooth jumping and chain derailment due to chain relaxation, thereby improving the operating stability of the equipment;

[0019] 2) The worm gear structure design in this utility model gives the tensioning scraper conveyor excellent self-locking performance. This structure can remain stationary without external force, preventing the system from sliding or reversing on its own, thereby significantly improving the safety and stability of the scraper conveyor during operation;

[0020] 3) The automatic tensioning device of the utility model has a simple and compact structural design, occupies a small space, can flexibly adapt to the narrow working surface environment, can fully adapt to the narrow working surface and ensure efficient coal mining operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the utility model;

[0022] Figure 2 It is a three-dimensional schematic diagram of an embodiment of the housing of the utility model;

[0023] Figure 3 This is a three-dimensional schematic diagram of an embodiment of the utility model with the outer shell removed;

[0024] In the picture:

[0025] 1. Housing, 1-1a, first chain slot, 1-1b, second chain slot, 1-2a, first support frame, 1-2b, second support frame, 1-3, support plate;

[0026] 2. Motor;

[0027] 3. Worm gear mechanism, 3-1. Worm gear, 3-2. Worm;

[0028] 4. Gear rack mechanism, 4-1a, first external gear, 4-1b, second external gear, 4-2a, first rack, 4-2b, second rack;

[0029] 5. Transmission rod; 6a. First guide groove; 6b. Second guide groove; 7. Connecting rod; 8. Roller; 9a. First tensioning pulley; 9b. Second tensioning pulley. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Example 1, as Figures 1 to 3 As shown, this embodiment provides an automatic tensioning device for an ultra-thin coal seam scraper conveyor, the automatic tensioning device comprising a housing 1, a motor 2 mounted inside the housing 1, a worm gear mechanism 3 located inside the housing 1, a rack and pinion mechanism 4 located outside the housing 1, a transmission rod 5, guide grooves (a first guide groove 6a and a second guide groove 6b), a connecting rod 7, a roller 8, and tensioning pulleys (a first tensioning pulley 9a and a second tensioning pulley 9b);

[0032] Among them, the motor 2 is connected to the worm gear mechanism 3 through an axis, the gear rack mechanism 4 is connected to the worm gear mechanism 3 through a transmission rod 5, the first tensioning wheel 9a and the second tensioning wheel 9b are symmetrically installed on the roller 8, and the connecting rod 7 is installed in the first guide groove 6a and the second guide groove 6b on both sides of the outer shell 1, and the connecting rod 7 can move linearly in the guide groove.

[0033] In addition to all the technical features of the first embodiment, this embodiment also includes: Figure 2 As shown, a first chain groove 1-1a and a second chain 1-1b are installed on both sides of the outer side of the shell 1, a first support frame 1-2a and a second support frame 1-2b are provided inside the shell 1, and a support plate 1-3 is installed on the rear side of the upper end surface of the shell 1; the motor 2 is fixedly installed on the lower side of the support plate 1-3, and the motor 2 is connected to the worm 3-2 through a rotating shaft.

[0034] like Figure 2 and Figure 3 As shown, the worm gear mechanism 3 includes a worm wheel 3-1 and a worm 3-2; wherein the worm wheel 3-1 is installed in the middle of the transmission rod 5, and the worm 3-2 is installed on the first support frame 1-2a and the second support frame 1-2b, and the worm wheel 3-1 and the worm 3-2 are installed in coordination;

[0035] In this embodiment, a pressure sensor is installed on the scraper chain to detect the tension of the scraper chain. When the tension of the scraper chain is insufficient, the external PLC controller controls the motor 2 to rotate, and the motor 2 drives the worm 3-2 to rotate, and the worm 3-2 drives the worm wheel 3-1 to rotate. The worm wheel 3-1 transmits the torque to the external gears on both sides through the transmission rod 5;

[0036] In addition to all the technical features of the second embodiment, this embodiment also includes: Figure 3 As shown, the rack and pinion mechanism 4 includes a first external gear 4-1a, a second external gear 4-1b, a first rack 4-2a and a second rack 4-2b;

[0037] The first external gear 4-1a and the second external gear 4-1b are symmetrically mounted at both ends of the transmission rod 5, and the first rack 4-2a and the second rack 4-2b are respectively mounted in the first chain groove 1-1a and the second chain groove 1-1b, and the first rack 4-2a and the second rack 4-2b can move linearly in the first chain groove 1-1a and the second chain groove 1-1b respectively;

[0038] like Figure 3 As shown, one end of the connecting rod 7 is fixed to one end of the first rack 4-2a, and the other end of the connecting rod 7 is fixed to one end of the second rack 4-2b, and the other end of the first rack 4-2a is installed in cooperation with the first external gear 4-1a, and the other end of the second rack 4-2b is installed in cooperation with the second external gear 4-1b.

[0039] In this embodiment, the first outer gear 4-1a and the second outer gear 4-1b rotate, driving the first rack 4-2a and the second rack 4-2b on both sides to move linearly in the first chain groove 1-1a and the second chain groove 1-1b respectively. The first rack 4-2a and the second rack 4-2b pull the two ends of the connecting rod 7 to move. A rotatable roller 8 is installed on the connecting rod 7. The roller 8 can rotate around the connecting rod 7, and then the roller 8 drives the first tensioning wheel 9a and the second tensioning wheel 9b to move, thereby realizing the tensioning of the scraper chain.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0041] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An automatic tensioning device for an ultra-thin coal seam scraper conveyor, comprising a housing (1) and a motor (2) located inside the housing (1); characterized in that: The motor (2) is connected to the worm gear mechanism (3) via a shaft; The worm gear mechanism (3) is connected to a rack and pinion mechanism (4) located outside the housing (1) via a transmission rod (5); A first guide groove (6a) and a second guide groove (6b) are respectively formed on two side surfaces of the housing (1), and a connecting rod (7) capable of linear motion is installed in the first guide groove (6a) and the second guide groove (6b); A rotatable roller (8) is mounted on the connecting rod (7), and a first tensioning wheel (9a) and a second tensioning wheel (9b) are symmetrically mounted on the roller (8).

2. The automatic tensioning device according to claim 1, characterized in that: A first chain slot (1-1a) and a second chain slot (1-1b) are symmetrically mounted on both sides of the outer side of the housing (1); a first support frame (1-2a) and a second support frame (1-2b) are mounted inside the housing (1), and a support plate (1-3) is mounted on the upper end surface of the housing (1).

3. The automatic tensioning device according to claim 2, characterized in that: The worm gear mechanism (3) comprises a worm wheel (3-1) and a worm (3-2) matched with the worm wheel (3-1); The worm wheel (3-1) is mounted in the middle of the transmission rod (5), and the worm (3-2) is mounted on a first support frame (1-2a) and a second support frame (1-2b).

4. The automatic tensioning device according to claim 3, characterized in that: The motor (2) is installed below the support plate (1-3), and the worm (3-2) is connected to the rotating shaft of the motor (2).

5. The automatic tensioning device according to claim 2, characterized in that: The rack and pinion mechanism (4) comprises a first external gear (4-1a), a second external gear (4-1b), a first rack (4-2a) and a second rack (4-2b); The first external gear (4-1a) and the second external gear (4-1b) are symmetrically mounted at both ends of the transmission rod (5), and the first rack (4-2a) and the second rack (4-2b) are respectively mounted in the first chain groove (1-1a) and the second chain groove (1-1b).

6. The automatic tensioning device according to claim 5, characterized in that: One end of the connecting rod (7) is fixed to one end of the first rack (4-2a), and the other end of the connecting rod (7) is fixed to one end of the second rack (4-2b), and the other end of the first rack (4-2a) is mounted in cooperation with the first external gear (4-1a), and the other end of the second rack (4-2b) is mounted in cooperation with the second external gear (4-1b).

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