A split sprocket shaft group for a high-power scraper conveyor

Abstract

The present invention discloses a split type sprocket shaft group for a high-power scraper conveyor, which comprises a sprocket component. The sprocket component includes an upper sprocket body, a lower sprocket body, coupling screws, cylindrical pins and fixing screws. The upper sprocket body and the lower sprocket body are connected by the coupling screws for casing connection; a cylindrical pin is arranged between the upper sprocket body and the lower sprocket body to transmit torque, and the cylindrical pin is fixed on the sprocket shaft group by the fixing screws; the coupling screws and the cylindrical pins are perpendicular to each other in different planes. Through the innovative design of the split type sprocket structure and the connection method, the present invention ensures the connection reliability of the split type sprocket under the conditions of limited installation space, the requirement of complete interchangeability and limited number of connection bolts. When the sprocket is reversed or replaced, only the connection bolts and the cylindrical pins need to be removed, and the upper and lower sprocket bodies are jacked out and then reinstalled. When replacing the sprocket ring, only the old sprocket ring needs to be removed and the new sprocket ring needs to be installed, saving a large number of spare parts and resources, and meeting the strategic goal of building a conservation-oriented society.

Description

Technical Field

[0001] The present invention relates to a key transmission system component on a scraper conveyor, specifically to a split type sprocket shaft group for a high-power scraper conveyor, belonging to the technical field of coal transportation in coal mines underground. Background Art

[0002] The main function of a scraper conveyor in a fully mechanized coal mining face in a coal mine underground is to continuously transport the coal mined by a coal shearer to a loader, ensuring the continuous transportation of coal from the fully mechanized coal mining face out of the mine underground. As the power output component of the scraper conveyor, the sprocket shaft group is a key component. During operation, it bears the intense impacts of the scraper chain, coal blocks, stones, etc. The harsh working conditions require it to have high strength and toughness, and at the same time, the sprocket is required to have high wear resistance and a long service life.

[0003] At present, the main structural forms of sprocket shaft groups at home and abroad generally adopt an integral structure. The integral sprocket shaft group is difficult to reverse and maintain. The sprocket ring is a vulnerable part. After being used for a period of time, it needs to be reversed or replaced, and the frequency is relatively high. When reversing the shaft group or replacing the sprocket ring, the entire sprocket shaft group needs to be removed from the frame. Due to its large volume and heavy weight, the disassembly is relatively difficult.

[0004] Underground operation conditions are limited. When replacing the integral sprocket piece, the entire sprocket shaft group needs to be transported to a maintenance workshop and all the parts on the shaft group need to be disassembled. Since disassembly and assembly will affect the performance and service life of bearings and floating seals, for safety reasons, bearings and floating seals generally need to be replaced when replacing the sprocket ring, resulting in an increase in maintenance costs and an increase in the amount of replacement work.

[0005] The split type sprocket shaft group has great advantages over the integral sprocket shaft group in terms of maintenance cost and convenience. However, the application of the split type sprocket shaft group is less. On the one hand, because the integral sprocket is easier to machine and its strength is easier to guarantee. On the other hand, under the same strength, in order to arrange a sufficient number of bolts to transmit the torque inside the sprocket body, the split type sprocket shaft group requires a larger external dimension than the integral sprocket shaft group, and thus has a greater requirement for the installation space of the frame.

[0006] The coal industry is developing towards high power and high efficiency and energy conservation. The split type sprocket shaft group can effectively shorten the maintenance time, save maintenance costs, and meet the urgent requirements for the capacity improvement of scraper conveyors. Summary of the Invention

[0007] The technical problem to be solved by the present invention is: to provide a split type sprocket shaft group for a high-power scraper conveyor to solve the problems in the background art. It combines the complex working conditions of the current actual production in coal mines underground and has the characteristics of simple structure, convenient disassembly and assembly, easy maintenance, high adaptability, long service life, etc.

[0008] The technical solution provided by the present invention to solve the technical problem is as follows:

[0009] A split-type sprocket shaft group for a high-power scraper conveyor, comprising a sprocket component. The sprocket component includes an upper sprocket body, a lower sprocket body, coupling screws, cylindrical pins and fixing screws. The upper sprocket body and the lower sprocket body are combined and connected through the coupling screws; a cylindrical pin is arranged between the upper sprocket body and the lower sprocket body to transmit torque, and the cylindrical pin is fixed on the sprocket shaft group through the fixing screws; the coupling screws and the cylindrical pins are skew perpendicular to each other.

[0010] A boss is arranged at the lower end of the upper sprocket body, and a groove is arranged at the upper end of the lower sprocket body. During assembly, the boss of the upper sprocket body is snapped into the groove of the lower sprocket body, and the combined box connection is carried out through the coupling screws.

[0011] In order to increase the strength and service life of the upper sprocket body and the lower sprocket body, a surface hardening process is used for treatment.

[0012] Aiming at the sprocket shaft group of the current highest-power scraper conveyor, on the premise of meeting the overall interchangeability with the original integral sprocket shaft group, with the principle of improving the service life of the sprocket shaft group and the goal of reducing maintenance costs and improving maintenance efficiency, a split-type design is carried out on the basis of the original sprocket shaft group of the scraper conveyor, ensuring that the split-type sprocket shaft group and the integral sprocket shaft group of the whole machine are completely interchangeable, and ensuring the consistency of the overall external dimensions, the external dimensions of the sprocket and the external dimensions of the bearing cup.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. Through the innovative design of the split-type sprocket structure and the innovative connection method, it solves the problem that in the case of limited installation space for the sprocket shaft group of the existing high-power heavy scraper conveyor, while requiring complete interchangeability and limited number of connection bolts, it ensures the connection reliability of the split-type sprocket and solves the industry problem.

[0015] 2. The split-type sprocket shaft group has maintenance advantages. In order to facilitate the disassembly and assembly of the sprocket ring, the sprocket ring is split into two parts and connected into one body with bolts during use. When the sprocket is reversed or replaced, only the connection bolts need to be loosened, the upper and lower sprocket bodies are pushed out and then reinstalled, without having to disassemble all the parts on the shaft group as before. And the bearing collar rings on both sides are relatively independent, and the disassembly and assembly do not affect each other.

[0016] After using the split-type sprocket shaft group, compared with the original integral sprocket shaft group: when the sprocket ring is reversed, there is no need to disassemble the entire sprocket shaft group from the frame, and only the sprocket ring needs to be disassembled for reversal. When replacing the sprocket ring, there is no need to disassemble the entire sprocket shaft group from the frame either, and the shaft group does not need to be lifted out of the well and pulled to the maintenance workshop, and only the old sprocket ring needs to be disassembled and a new sprocket ring needs to be installed.

[0017] 3. Reduce maintenance costs and achieve significant economic benefits. By arranging a split-type sprocket shaft group on the frame of the existing integral sprocket shaft group, which can ensure both strength and spatial dimension position requirements, the split-type sprocket shaft group will not damage the bearings and floating seals when replacing the sprocket discs, saving spare parts costs.

[0018] Compared with the integral sprocket structure, after using the split-type sprocket shaft group, not only will the downtime be reduced when replacing the sprocket ring, which is equivalent to increasing coal production, but also the equipment maintenance and renewal costs will be saved, and the production and economic benefits are obvious.

[0019] Since all parts on the shaft group do not need to be disassembled when replacing the sprocket of the split-type sprocket shaft group, it is avoided that the bearings and floating seals are damaged and replaced due to disassembly and assembly. In this way, the bearings and floating seals can be used until their design life before being replaced, greatly reducing the waste of expensive bearings and floating seals.

[0020] The replacement of the split-type sprocket can be carried out on the production working face site without removing the shaft group from the frame and transporting it back to the maintenance workshop for replacement, saving the labor cost of returning the sprocket shaft group to the factory for maintenance.

[0021] Compared with the integral type, after adopting the split-type sprocket shaft group, the number of times of returning to the factory for maintenance is reduced every year, and a large amount of freight can also be saved.

[0022] 4. The sprocket ring and the sprocket shaft are designed into a split-type structure. After the sprocket ring is worn, only the sprocket ring needs to be replaced, and other parts of the shaft group can still be used, saving a large number of spare parts such as bearings and floating seals, saving resources, and meeting the strategic goal of building a conservation-minded society. Brief Description of the Drawings

[0023] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0024] Figure 1 is the assembly structure schematic diagram of the sprocket shaft group of the present invention;

[0025] Figure 2 is the assembly structure schematic diagram of removing the sprocket component in the present invention;

[0026] Figure 3 is the structure schematic diagram of the sprocket component in the present invention;

[0027] Figure 4 is Figure 3 the side view of;

[0028] Figure 5 is Figure 3 the top view of;

[0029] Figure 6 is the perspective view of Figure 3 ;

[0030] Figure 7 is Figure 5 the sectional view taken along line B-B in

[0031] Figure 8 is Figure 5 the sectional view taken along line A-A in

[0032] Figure 9 is the structural schematic diagram of the sprocket body on the sprocket component in the present invention;

[0033] Figure 10 is Figure 9 the side view of

[0034] Figure 11 is Figure 9 the top view of

[0035] Figure 12 is Figure 9 the perspective view of

[0036] Figure 13 is the structural schematic diagram of the lower sprocket body on the sprocket component in the present invention;

[0037] Figure 14 is Figure 13 the side view of

[0038] Figure 15 is Figure 13 the top view of

[0039] Figure 16 is Figure 13 the perspective view of

[0040] In the figure: 1. Left bearing housing; 2. First flat key; 3. Shaft end pressing plate; 4. Screw; 5. Washer; 6. Drum tooth coupling; 7. Floating seal seat; 8. Bolt; 9. Floating seal ring; 10. Thread locking ring; 11. Left bearing; 12. Floating seal ring; 13. Floating seal seat; 14. First O-ring; 15. Sprocket component; 16. O-ring; 17. Sprocket shaft; 18. Second flat key; 19. Right bearing housing; 20. Second O-ring; 21. Third O-ring; 22. Right bearing housing bushing; 23. Cylindrical pin; 24. Right floating seal seat; 25. Screw; 151. Upper sprocket body; 152. Lower sprocket body; 153. Connecting screw; 154. Cylindrical pin; 155. Fixing screw. Specific embodiments

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. In the present invention, for the convenience of description, the relative positional relationships of the components are all described according to the layout of the accompanying drawings of the specification. For example, the positional relationships such as front, rear, upper, lower, left, and right are determined according to the layout direction of the description.

[0042] Please refer to the attached Figure 1 ~attached Figure 16 , and the present invention provides the following specific embodiments:

[0043] Embodiment: A split sprocket shaft group for a high-power scraper conveyor, including a sprocket component 15. The sprocket component 15 includes an upper sprocket body 151, a lower sprocket body 152, coupling screws 153, cylindrical pins 154, and fixing screws 155. The upper sprocket body 151 and the lower sprocket body 152 are joined together by the coupling screws 153; a cylindrical pin 154 is arranged between the upper sprocket body 151 and the lower sprocket body 152 to transmit torque, and the cylindrical pin 154 is fixed on the sprocket shaft group by the fixing screws 155; the coupling screws 153 and the cylindrical pins 154 are perpendicular to each other in different planes.

[0044] A boss is provided at the lower end of the upper sprocket body 151, and a groove is provided at the upper end of the lower sprocket body 152. During assembly, the boss of the upper sprocket body 151 is snapped into the groove of the lower sprocket body 152, and the box is joined by the coupling screws 153.

[0045] In order to increase the strength and service life of the upper sprocket body 151 and the lower sprocket body 152, a surface hardening process is used for treatment.

[0046] The sprocket component 15 is divided into an upper sprocket body 151 and a lower sprocket body 152 considering the overall strength check result of the sprocket and the machining processability, etc., and is joined together by the coupling screws 153. Due to the influence of factors such as the scraper conveyor frame and the sizes of the two end bearing seats, and at the same time due to the limitations of the structure of the sprocket body itself, it is impossible to arrange more bolts to transmit the torque on the shaft group.

[0047] Under the condition of limited space structure and at the same time increasing the power transmitted by the sprocket shaft group, in order to transmit a larger torque, a cylindrical pin 154 is arranged between the upper sprocket body 151 and the lower sprocket body 152 to transmit torque. At the same time, the fixing screws 155 are used to fix the cylindrical pin 154 to make it firmly fixed on the sprocket shaft group.

[0048] The working principle and usage process of the present invention:

[0049] The split sprocket shaft group of high-power scraper conveyor is mainly used to increase the torque of the motor through the reducer and then drive the chain to move through the sprocket on the sprocket shaft group, so as to complete the continuous movement of the scraper and transfer the coal mined by the shearer in the fully mechanized coal mining face to the conveyor.

[0050] Using the cylindrical pin 154 can not only ensure the precise positioning between the upper sprocket body 151 and the lower sprocket body 152, but also be used to transmit a very large torque. The box screws of the upper and lower sprocket bodies no longer bear the torque transmission function between the upper and lower sprocket bodies, and the selection of size and quantity is no longer restricted, perfectly solving the dilemma of insufficient space for arranging bolts on the sprocket body.

[0051] During use: First, install the left end of the sprocket shaft group. Install the floating seal ring 12 and the O-ring 14 into the floating seal seat 13 to form a component, and then install it on the sprocket shaft 17; install the floating seal ring 9, the threaded locking ring 10, the left bearing 11, and the floating seal ring 12 into the left bearing housing 1 to form a component, and then install it on the sprocket shaft 17; install the floating seal seat 7, the bolt 8, and the floating seal ring 9 on the drum-shaped tooth coupling 6 to form a component, and then install it on the sprocket shaft 17; install the shaft end pressing plate 3, the screw 4, and the washer 5 on the sprocket shaft 17, and then install the right end of the sprocket shaft group. Install the floating seal ring 12 and the O-ring 14 into the floating seal seat 13 to form a component, and then install it on the sprocket shaft 17. Install the bearing 11 and the floating seal ring 12 into the right bearing housing bushing 22 to form a component, and then install it on the sprocket shaft 17; install the cylindrical pin 23, the O-ring 21, and the right bearing housing 19 on the serial number right bearing housing bushing 22; install the floating seal ring 9, the right floating seal seat 24, and the screw 25 on the right bearing housing bushing 22; install the floating seal seat 7, the bolt 8, and the floating seal ring 9 on the drum-shaped tooth coupling 6 to form a component, and then install it on the sprocket shaft 17; install the shaft end pressing plate 3, the screw 4, and the washer 5 on the sprocket shaft 17, then install the flat key 18 onto the sprocket shaft 17, and install the flat key 2 onto the left bearing housing 1 and the right bearing housing 19.

[0052] According to the attached Figure 2 After all the parts of the sprocket shaft group shown are assembled, start installing the sprocket component 15. First, align the keyway of the upper sprocket body 151 with the flat key 18 on the sprocket shaft 17 and snap it in, then align the keyway of the lower sprocket body 152 with the flat key 18 on the sprocket shaft 17 and snap it in. After completing the above procedures, screw in the connecting screw 153, do not tighten it temporarily, install the cylindrical pin 154 into the upper sprocket body 151 and the lower sprocket body 152. After all the cylindrical pins are correctly installed, tighten all the connecting screws 153 according to the specified torque requirements, and finally screw the fixing screw 155 into the cylindrical pin 154.

[0053] When the sprocket is worn to the set mark, first remove the fixing screw 155, use a pin extractor to pull out all the cylindrical pins 154, and then remove the connecting screw 153. At this time, the upper sprocket body 151 and the lower sprocket body 152 can be separated from the sprocket shaft group, the sprocket component 15 and the sprocket shaft 17. Subsequently, the upper sprocket body 151 and the lower sprocket body 152 can be horizontally rotated 180° and installed according to the previous installation method.

[0054] So far, the commutation of the sprocket component 15 is completed, which can be implemented underground and requires a short replacement time. Similarly, if a new sprocket body is replaced, it is also carried out according to the above operation method, and the sprocket shaft group does not need to be lifted to the maintenance workshop for replacement.

[0055] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A split-type sprocket shaft group for a high-power scraper conveyor, comprising a sprocket component (15), characterized in that: The sprocket component (15) includes an upper sprocket body (151), a lower sprocket body (152), coupling screws (153), cylindrical pins (154) and fixing screws (155). The upper sprocket body (151) and the lower sprocket body (152) are joined by the coupling screws (153); a cylindrical pin (154) is arranged between the upper sprocket body (151) and the lower sprocket body (152) to transmit torque, and the cylindrical pin (154) is fixed on the sprocket shaft group by the fixing screws (155); the coupling screws (153) and the cylindrical pins (154) are skew perpendicular to each other; a boss is provided at the lower end of the upper sprocket body (151), and a groove is provided at the upper end of the lower sprocket body (152). During assembly, the boss of the upper sprocket body (151) is snapped into the groove of the lower sprocket body (152), and the upper and lower sprocket bodies are joined by the coupling screws (153); in order to increase the strength and service life of the upper sprocket body (151) and the lower sprocket body (152), a surface hardening process is used for treatment.

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