Rapid chain wheel replacing device of scraper conveyor

Abstract

The utility model provides a scraper conveyor chain wheel quick replacement device which comprises a main shaft and chain wheel teeth, a plurality of groups of round holes are formed in the outer side wall of the main shaft, a plurality of groups of connecting holes are formed in the chain wheel teeth, a connecting cylindrical pin and a positioning cylindrical pin are fixedly arranged on the inner side of the chain wheel teeth, an expansion sleeve is arranged in the connecting cylindrical pin, and a threaded hole is formed in the middle of the expansion sleeve. And the threaded hole is communicated with the connecting main hole. According to the device, the sprocket teeth are connected with the main shaft in a fastening connection mode of the cylindrical pins and the expansion sleeves, after chain nests on one sides of the sprocket teeth are abraded, the sprocket teeth can be disassembled in sequence and rotated by 180 degrees to be installed, the chain nests on the two sides can be used alternately, replacement is convenient and fast, the abraded sprocket teeth are taken down in sequence during assembly, and new sprocket teeth are installed on the main shaft. And the bolts are fastened in sequence by aligning with the positioning holes to finish replacement. The device solves the problems that the front and rear machine heads and machine tails of the scraper conveyor and the chain wheel shaft group are difficult to replace, the shaft is difficult to lift, the underground maintenance cannot be carried out and the like, the production efficiency is greatly improved, the mechanical efficiency is maximized, and the device is safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission machinery, in particular to a fast-changing sprocket wheel device for a coal mine scraper conveyor. Background Art

[0002] With the advancement of science and technology and the rise of artificial intelligence, more and more coal mines have vigorously promoted new technologies, new processes and new equipment to reduce the labor intensity of workers, improve the working environment of employees, and improve work efficiency, providing a guarantee for high-yield, high-efficiency and safe mining. In recent years, through the study and research of imported equipment from abroad, combined with the characteristics of domestic coal mines, we have developed small, medium and heavy conveying equipment of comparable quality in terms of drive, round chain, telescopic part, middle trough, conveyor condition monitoring, dynamic control and other aspects of conveying equipment, and with the innovation of technology, conveying equipment is still shifting towards high strength and high power.

[0003] Since the scraper conveyor is the main conveying equipment in the fully mechanized mining face, its head and tail sprocket assemblies are the main transmission and force-bearing parts of the scraper. The original sprocket assembly design is that the sprocket and the shaft are connected by a spline shaft, and the two ends are composed of seals, bearings, baffles and lubrication systems. After working for a long time, the sprocket and chain nest are worn, and the sprocket assembly needs to be replaced as a whole or repaired on the well. Due to the limitations of underground working conditions, it is difficult to disassemble and transport damaged equipment, the workers have a high workload, and the shutdown for maintenance leads to suspension of production, affecting production efficiency. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a device for quickly replacing sprockets for a scraper conveyor, which facilitates the replacement and maintenance of the sprocket teeth of the sprocket assembly of the scraper conveyor underground on the basis of ensuring a tight connection and good safety, without disassembling the equipment, thereby reducing the labor intensity of workers, reducing maintenance costs, and shortening maintenance time.

[0005] The utility model provides a device for quickly replacing sprockets for a scraper conveyor, comprising a main shaft and sprocket teeth detachably mounted on the main shaft, an array of circular holes being arranged on the outer wall of the main shaft, an array of connecting main holes and connecting auxiliary holes being arranged on the sprocket teeth, a connecting cylindrical pin and a positioning cylindrical pin being fixedly arranged on the inner side of the sprocket teeth, the connecting cylindrical pin and the positioning cylindrical pin being detachably mounted in the circular holes, an expansion sleeve being arranged in the connecting cylindrical pin, a threaded hole being arranged in the middle of the expansion sleeve, and the threaded hole being communicated with the connecting main hole.

[0006] Preferably, the number of the circular holes in each group is three, and two connecting cylindrical pins and one positioning cylindrical pin are respectively installed in the three circular holes.

[0007] Preferably, the expansion sleeve is conical.

[0008] Preferably, a group of positioning mechanisms are provided on the main shaft, and the positioning mechanisms are symmetrically arranged at both ends of the sprocket teeth, and the other side of the positioning mechanisms is equipped with a middle cover assembly or an end cover assembly.

[0009] Preferably, the positioning mechanism includes a support seat arranged on the main shaft, one end of the support seat is in contact with the limit platform and sprocket teeth on the main shaft, and the other end of the support seat is provided with a bearing seat, an inner positioning sleeve and an outer positioning sleeve are provided in the bearing seat, a bearing is provided between the inner positioning sleeve and the outer positioning sleeve, and the bearing is mounted on the main shaft.

[0010] Preferably, the middle sleeve cover assembly includes a positioning cover, a transparent cover and a lock nut arranged on the main shaft, the positioning cover is arranged in the outer positioning sleeve and its end is in contact with the bearing, the lock nut is arranged at the end of the positioning cover, and the transparent cover is detachably arranged at the end of the bearing seat.

[0011] Preferably, the end sleeve cover assembly includes a baffle and an end cover arranged on the main shaft, the baffle is arranged in the outer positioning sleeve, the baffle is detachably connected to the end of the main shaft and contacts the end of the bearing, and the end cover is detachably arranged at the end of the bearing seat.

[0012] Working principle of the utility model: the utility model is a device for quickly replacing sprockets for scraper conveyors, which adopts a cylindrical pin and an expansion sleeve fastening connection method to connect the sprocket teeth to the main shaft, uses bolts to connect the main holes and the expansion sleeve threads, and uses bolts to fasten through the secondary holes. When the chain nests on one side of the sprocket teeth are worn, the sprocket teeth can be disassembled in sequence and rotated 180° for installation, and the chain nests on both sides can be used alternately, that is, the worn side of the sprocket and the chain nest are set on the non-stress side, and the unworn chain nest on one side continues to be used for a cycle, and the sprocket teeth are replaced with new ones when the chain nests on both sides of the sprocket teeth are worn. The replacement is convenient and quick, and there is no need to disassemble the sprocket assembly and the head and tail frames of the scraper machine. Only the sprocket tooth fixing bolts need to be disassembled, and the worn sprocket teeth are removed in sequence during assembly, and new sprocket teeth are installed on the main shaft. The bolts are tightened in sequence to align with the positioning holes to complete the replacement.

[0013] The beneficial effects of the utility model are as follows: the sprocket device for the scraper conveyor of the utility model is quick to replace, which is convenient for tooth installation and replacement. After the sprocket teeth of the sprocket shaft group of the scraper machine of the comprehensive mining working face of the coal mine are damaged, they can be quickly replaced without disassembling the equipment. They can be replaced underground in the coal mine, which reduces the number of maintenance workers during maintenance, reduces the labor intensity of workers, greatly reduces maintenance costs, shortens maintenance time, reduces the number and time of downtime, increases production capacity, and saves costs. Secondly, it is fixed by a cylindrical pin and an expansion sleeve fastening connection method. The cylindrical pin and the sprocket teeth are an integral structure with strong impact resistance and reliable positioning. The expansion sleeve has the advantages of easy disassembly, reliable connection, and not easy to loosen, thereby ensuring production safety. In addition, the sprocket teeth of this structure are designed with 7 teeth, 6 teeth, 5 teeth, etc. according to the main machine. The sprocket teeth can be rotated 180° for installation, and the chain nests on both sides of the sprocket teeth can be used alternately, that is, the worn side of the sprocket and the chain nest is set on the non-stress side, which prolongs the service life and reduces the maintenance frequency and cost.

[0014] In summary, the device solves the problems of difficult replacement of the front and rear heads and tails of coal mine scraper conveyors, sprocket shaft assemblies, difficulty in lifting, and inability to repair underground. It greatly improves production efficiency, maximizes mechanical efficiency, and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an axial cross-sectional view of the utility model of a device for quickly replacing sprocket wheels for a coal mine scraper conveyor;

[0016] Figure 2 for Figure 1 Sectional view along AA;

[0017] Figure 3 for Figure 1 Schematic diagram of the structure of the middle sprocket teeth;

[0018] Figure 4 for Figure 3 Cross-section along BB.

[0019] In the figure: main shaft 1, sprocket teeth 2, round hole 3, connecting main hole 4, connecting auxiliary hole 5, connecting cylindrical pin 6, positioning cylindrical pin 7, expansion sleeve 8, threaded hole 9, positioning mechanism 10, support seat 10-1, bearing seat 10-2, inner positioning sleeve 10-3, outer positioning sleeve 10-4, bearing 10-5, middle sleeve cover assembly 11, positioning cover 11-1, transparent cover 11-2, lock nut 11-3, end sleeve cover assembly 12, baffle 12-1, end cover 12-2. DETAILED DESCRIPTION

[0020] In order to make the technical solution of the present utility model easier to understand, the technical solution of the present utility model is now clearly and completely described in the form of specific embodiments in combination with the accompanying drawings.

[0021] Embodiment 1:

[0022] like Figures 1 to 4 As shown, the quick-change sprocket device of this embodiment includes a main shaft 1 and a sprocket tooth 2 detachably mounted on the main shaft 1. The outer wall of the main shaft 1 is provided with an array of circular holes 3, and the sprocket tooth 2 is provided with an array of connecting main holes 4 and connecting secondary holes 5. A connecting cylindrical pin 6 and a positioning cylindrical pin 7 are fixedly provided on the inner side of the sprocket tooth 2. The connecting cylindrical pin 6 and the positioning cylindrical pin 7 are detachably mounted in the circular hole 3. An expansion sleeve 8 is provided in the connecting cylindrical pin 6, and a threaded hole 9 is provided in the middle of the expansion sleeve 8. The threaded hole 9 is connected to the connecting main hole 4.

[0023] The number of the circular holes 3 in each group is three, and two connecting cylindrical pins 6 and one positioning cylindrical pin 7 are respectively installed in the three circular holes 3 .

[0024] The expansion sleeve 8 is conical.

[0025] Embodiment 2:

[0026] like Figures 1 to 4 As shown, the quick-change sprocket device of this embodiment includes a main shaft 1 and a sprocket tooth 2 detachably mounted on the main shaft 1. The outer wall of the main shaft 1 is provided with an array of circular holes 3, and the sprocket tooth 2 is provided with an array of connecting main holes 4 and connecting secondary holes 5. A connecting cylindrical pin 6 and a positioning cylindrical pin 7 are fixedly provided on the inner side of the sprocket tooth 2. The connecting cylindrical pin 6 and the positioning cylindrical pin 7 are detachably mounted in the circular hole 3. An expansion sleeve 8 is provided in the connecting cylindrical pin 6, and a threaded hole 9 is provided in the middle of the expansion sleeve 8. The threaded hole 9 is connected to the connecting main hole 4.

[0027] The number of the circular holes 3 in each group is three, and two connecting cylindrical pins 6 and one positioning cylindrical pin 7 are respectively installed in the three circular holes 3 .

[0028] The expansion sleeve 8 is conical.

[0029] The main shaft 1 is provided with a group of positioning mechanisms 10 , which are symmetrically arranged at both ends of the sprocket teeth 2 , and the other side of the positioning mechanisms 10 is equipped with a middle cover assembly 11 or an end cover assembly 12 .

[0030] The positioning mechanism 10 includes a support seat 10-1 arranged on the main shaft 1, one end of the support seat 10-1 is in contact with the limit platform and the sprocket 2 on the main shaft 1, and the other end of the support seat 10-1 is provided with a bearing seat 10-2, and the bearing seat 10-2 is provided with an inner positioning sleeve 10-3 and an outer positioning sleeve 10-4, and a bearing 10-5 is provided between the inner positioning sleeve 10-3 and the outer positioning sleeve 10-4, and the bearing 10-5 is mounted on the main shaft 1.

[0031] The middle sleeve cover assembly 11 includes a positioning cover 11-1, a transparent cover 11-2 and a lock nut 11-3 arranged on the main shaft 1. The positioning cover 11-1 is arranged in the outer positioning sleeve 10-4 and its end is in contact with the bearing 10-5. The lock nut 11-3 is arranged at the end of the positioning cover 11-1. The transparent cover 11-2 is detachably arranged at the end of the bearing seat 10-2; the transparent cover 11-2 is connected to one end of the bearing seat 10-2 by bolts.

[0032] The end sleeve cover assembly 12 includes a baffle 12-1 and an end cover 12-2 arranged on the main shaft 1, the baffle 12-1 is arranged in the outer positioning sleeve 10-4, the baffle 12-1 is detachably connected to the end of the main shaft 1 and contacts with the end of the bearing 10-5, and the end cover 12-2 is detachably arranged at the end of the bearing seat 10-2; the baffle 12-1 is connected to one end of the main shaft 1 by bolts, and the end cover 12-2 is connected to one end of the bearing seat 10-2 by bolts.

[0033] It should be noted that the embodiments described herein are only partial embodiments of the present invention, rather than all implementations of the present invention, and the embodiments are only exemplary, and their role is only to provide a more intuitive and clear way to understand the content of the present invention, rather than to limit the technical solutions described in the present invention. Without departing from the concept of the present invention, all other implementation methods that ordinary technicians in the field can think of without creative work, and other simple replacements and various changes to the technical solutions of the present invention, all belong to the protection scope of the present invention.

Claims

1. A sprocket quick-change device for a scraper conveyor, characterized in that: The invention comprises a main shaft (1) and a sprocket (2) detachably mounted on the main shaft (1); an array of circular holes (3) is arranged on the outer wall of the main shaft (1); an array of connecting main holes (4) and connecting auxiliary holes (5) are arranged on the sprocket (2); a connecting cylindrical pin (6) and a positioning cylindrical pin (7) are fixedly arranged on the inner side of the sprocket (2); the connecting cylindrical pin (6) and the positioning cylindrical pin (7) are detachably mounted in the circular hole (3); an expansion sleeve (8) is arranged in the connecting cylindrical pin (6); a threaded hole (9) is arranged in the middle of the expansion sleeve (8); and the threaded hole (9) is communicated with the connecting main hole (4).

2. The sprocket quick-change device for a scraper conveyor according to claim 1, characterized in that: The number of the circular holes (3) in each group is three, and two connecting cylindrical pins (6) and one positioning cylindrical pin (7) are respectively installed in the three circular holes (3).

3. The sprocket quick-change device for a scraper conveyor according to claim 1, characterized in that: The expansion sleeve (8) is conical.

4. The sprocket quick-change device for a scraper conveyor according to claim 1, characterized in that: The main shaft (1) is provided with a group of positioning mechanisms (10), which are symmetrically arranged at the two ends of the sprocket teeth (2), and the other side of the positioning mechanism (10) is equipped with a middle cover assembly (11) or an end cover assembly (12).

5. The sprocket quick-change device for a scraper conveyor as claimed in claim 4, characterized in that: The positioning mechanism (10) comprises a support seat (10-1) arranged on the main shaft (1); one end of the support seat (10-1) is in contact with a limit table and a sprocket (2) on the main shaft (1); the other end of the support seat (10-1) is provided with a bearing seat (10-2); an inner positioning sleeve (10-3) and an outer positioning sleeve (10-4) are arranged in the bearing seat (10-2); a bearing (10-5) is arranged between the inner positioning sleeve (10-3) and the outer positioning sleeve (10-4); and the bearing (10-5) is mounted on the main shaft (1).

6. The sprocket quick-change device for a scraper conveyor according to claim 5, characterized in that: The middle sleeve cover assembly (11) comprises a positioning cover (11-1) arranged on the main shaft (1), a transparent cover (11-2) and a lock nut (11-3); the positioning cover (11-1) is arranged in the outer positioning sleeve (10-4) and its end is in contact with the bearing (10-5); the lock nut (11-3) is arranged at the end of the positioning cover (11-1); and the transparent cover (11-2) is detachably arranged at the end of the bearing seat (10-2).

7. The sprocket quick-change device for a scraper conveyor according to claim 5, characterized in that: The end sleeve cover assembly (12) comprises a baffle (12-1) and an end cover (12-2) arranged on the main shaft (1); the baffle (12-1) is arranged in the outer positioning sleeve (10-4); the baffle (12-1) is detachably connected to the end of the main shaft (1) and contacts the end of the bearing (10-5); and the end cover (12-2) is detachably arranged at the end of the bearing seat (10-2).

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