Hammer shaft assembly for crusher

Abstract

The utility model provides a hammer shaft assembly for a crusher. The hammer shaft assembly comprises a first cutter tooth holder, a second cutter tooth holder, a third cutter tooth holder, a fourth cutter tooth holder, an expansion sleeve and a shaft, inner holes of the first cutter tooth holder, the second cutter tooth holder, the third cutter tooth holder and the fourth cutter tooth holder are subjected to finish machining, and are respectively connected with the shaft through expansion sleeves. The hammer shaft assembly for the crusher relates to the technical field of crushers for coal mines, complex special equipment or a large amount of human input is not needed when the cutter tooth holder is replaced, disassembled and installed, the working intensity of maintenance personnel is greatly reduced, the time for equipment shutdown maintenance is effectively shortened, and the maintenance efficiency is improved. Energy and maintenance cost are remarkably saved, efficient and stable operation of the crusher is powerfully guaranteed, and production delay and economic loss caused by tedious and tedious maintenance work are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mine crusher technology field, especially relates to a hammer shaft assembly for crusher. BACKGROUND

[0002] The coal mine crusher is one of the components of the complete conveying equipment in the coal mine underground, and mainly functions to break the coal cut by the coal mining machine into small pieces by the hammer shaft assembly, so as to facilitate the transportation of the coal from the coal mine underground to the coal bunker. The hammer head in the hammer shaft assembly is a vulnerable part in the process of breaking the coal, and the tooth holder is often damaged due to the force contact with the coal in the breaking process. Therefore, the tooth holder needs to be replaced. Since the conventional structure of the tooth holder and the shaft is positioned by a flat key and installed by interference fit, the tooth holder is cut and damaged in the disassembly process. In particular, when the middle tooth holder is damaged and the two side tooth holders are not damaged, the undamaged tooth holder needs to be cut and damaged before the middle damaged tooth holder can be disassembled, which causes serious waste of resources. In addition, the undamaged shaft may be bumped or cut in the cutting and damaging process. The damaged part needs to be cut in the whole disassembly process, and even the intact part needs to be cut. The assembly process requires hot assembly or cold assembly. Therefore, it is necessary to design a hammer shaft assembly structure for the crusher which is convenient to disassemble and assemble without damaging other parts. SUMMARY

[0003] The utility model mainly solves the technical problem to provide a hammer shaft assembly for the crusher which can solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] A hammer shaft assembly for the crusher, comprising a first tooth holder, a second tooth holder, a third tooth holder, a fourth tooth holder, an expansion sleeve and a shaft, the inner holes of the first tooth holder, the second tooth holder, the third tooth holder and the fourth tooth holder are finished, and the shaft is connected to the expansion sleeve.

[0006] Further, a spacing plate is arranged between the first tooth holder and the second tooth holder, between the second tooth holder and the third tooth holder, and between the third tooth holder and the fourth tooth holder.

[0007] Positioning holes are arranged on the first tooth holder, the second tooth holder, the third tooth holder, the fourth tooth holder and the spacing plate, and the first tooth holder, the second tooth holder, the third tooth holder, the fourth tooth holder and the spacing plate are positioned and connected by punching pins into the positioning holes.

[0008] A third round nut is arranged at one end away from the first blade tooth seat, and a fourth round nut is arranged at one end away from the fourth blade tooth seat.

[0009] Further, the shaft is provided with bearings at both ends, the upper and lower ends of the bearing at one end are respectively provided with first bearing seats, and the bearing at one end is mounted in the first bearing seat;

[0010] The first bearing seat is provided with an end cover at one end, the first bearing seat and the bearing at one end are provided with a positioning ring therebetween, the bearing at one end is provided with a first round nut close to the end cover, the first round nut is connected with the shaft through threads, a thrust washer is arranged between the bearing at one end and the first round nut, the shaft is prevented from loosening through the cooperation of the key groove on the shaft and the thrust washer, the first bearing seat is provided with a labyrinth ring away from the end cover, and a skeleton oil seal is adopted for sealing, and the labyrinth ring is connected with the shaft through transition fit;

[0011] The upper and lower ends of the bearing at the other end are respectively provided with second bearing seats, and the bearing at the other end is mounted in the second bearing seat;

[0012] The second bearing seat is provided with the labyrinth ring at one end, a skeleton oil seal is adopted for sealing, the second bearing seat and the bearing at the other end are provided with the positioning ring therebetween, the second bearing seat is provided with a transparent cover at the other end, the transparent cover and the bearing at the other end are provided with the positioning ring therebetween, the transparent cover is provided with a second round nut and a thrust washer away from the second bearing seat and is coaxial with the shaft, and a skeleton oil seal is adopted for sealing between the second round nut and the transparent cover.

[0013] Further, the bearing adopts a self-aligning roller bearing.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The hammer shaft assembly for the crusher is simple and convenient to disassemble, only needs to tighten the expansion sleeve nut, can be disassembled, does not cut spare parts and causes resource waste, is simple and convenient to install, does not need to be fired or cold-mounted and causes energy waste, only needs to tighten the bolt, expands the sleeve and is tight, generates enough radial force, does not damage other spare parts when disassembling, and therefore can reduce cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings that form a part of the present utility model are used to provide a further understanding of the present utility model, and the illustrative embodiments of the present utility model and the description thereof are used to explain the present utility model, and do not constitute improper limitation on the present utility model. In the drawings:

[0017] Figure 1 The utility model discloses a hammer shaft assembly structure schematic view for crusher.

[0018] Figure 2 The hammer shaft assembly for the crusher is shown in the whole schematic view of the embodiment of the utility model;

[0019] Marked explanation:

[0020] 1, shaft; 2, first cutter tooth seat; 3, second cutter tooth seat; 4, third cutter tooth seat; 5, fourth cutter tooth seat; 6, bearing; 7, first bearing seat; 8, end cover; 9, positioning ring; 10, labyrinth ring; 11, expansion sleeve; 12, second bearing seat; 13, skeleton oil seal; 14, first round nut; 15, thrust washer; 16, transparent cover; 17, spacer plate; 18, second round nut; 19, pin; 20, third round nut; 21, fourth round nut. Specific implementation

[0021] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0022] In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "upper", "lower", "inner", "back" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0023] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0024] The embodiment relates to a hammer shaft assembly for a crusher, which can reduce the time and labor cost of equipment maintenance, improve the overall work efficiency, and effectively save energy.

[0025] Based on the above design idea, an exemplary structure of the hammer shaft assembly for the crusher of the embodiment is shown in the drawing, which mainly comprises a first cutter tooth seat 2, a second cutter tooth seat 3, a third cutter tooth seat 4, a fourth cutter tooth seat 5, an expansion sleeve 11 and a shaft 1. Figure 1 The inner holes of the first cutter tooth seat 2, the second cutter tooth seat 3, the third cutter tooth seat 4 and the fourth cutter tooth seat 5 are precisely machined, and are connected with the shaft 1 through the expansion sleeve 11 respectively.

[0026] The first cutter tooth seat 2 and the second cutter tooth seat 3, the second cutter tooth seat 3 and the third cutter tooth seat 4, and the third cutter tooth seat 4 and the fourth cutter tooth seat 5 are respectively provided with a spacing plate 17; the first cutter tooth seat 2, the second cutter tooth seat 3, the third cutter tooth seat 4, the fourth cutter tooth seat 5 and the spacing plate 17 are provided with positioning holes, and the first cutter tooth seat 2, the second cutter tooth seat 3, the third cutter tooth seat 4, the fourth cutter tooth seat 5 and the spacing plate 17 are positioned and connected by means of a pin 19 punched into the positioning holes; a third circular nut 20 is arranged at an end away from the first cutter tooth seat 2, and a fourth circular nut 21 is arranged at an end away from the fourth cutter tooth seat 5.

[0027] The shaft 1 is provided with a bearing 6 at both ends, the upper and lower ends of the one-end bearing 6 are respectively provided with a first bearing seat 7, and the one-end bearing 6 is installed in the first bearing seat 7; the first bearing seat 7 is provided with an end cover 8 at one end, the first bearing seat 7 and the one-end bearing 6 are provided with a positioning ring 9 therebetween, the one-end bearing 6 is provided with a first circular nut 14 close to the end cover 8, the first circular nut 14 is connected with the shaft 1 through threads, the one-end bearing 6 and the first circular nut 14 are provided with a thrust washer 15 therebetween, the shaft 1 and the thrust washer 15 are matched through a key groove to prevent loosening, the first bearing seat 7 is provided with a labyrinth ring 10 at a side away from the end cover 8, and is sealed by a skeleton oil seal 13, and the labyrinth ring 10 is connected with the shaft 1 through a transition fit; the upper and lower ends of the other-end bearing 6 are respectively provided with a second bearing seat 12, and the other-end bearing 6 is installed in the second bearing seat 12; the second bearing seat 12 is provided with a labyrinth ring 10 at one end, and is sealed by a skeleton oil seal 13, the second bearing seat 12 and the other-end bearing 6 are provided with a positioning ring 9 therebetween, the other end of the second bearing seat 12 is provided with a transparent cover 16, the transparent cover 16 and the other-end bearing 6 are provided with a positioning ring 9 therebetween, the transparent cover 16 is provided with a second circular nut 18 and a thrust washer 15 at an end away from the second bearing seat 12, and is coaxially arranged on the shaft 1, and the second circular nut 18 and the transparent cover 16 are sealed by a skeleton oil seal 13; specifically, the bearing 6 is a self-aligning roller bearing.

[0028] Specifically, the cutter tooth seat 2, the cutter tooth seat 3, the cutter tooth seat 4 and the cutter tooth seat 5 are connected together with the shaft 1 through the expansion sleeve 11, the bearing 6 is a self-aligning roller bearing in a rotary manner, the labyrinth ring 10 is connected with the shaft 1 through a transition fit, the first bearing seat 7 and the labyrinth ring 10 and the second bearing seat 12 and the labyrinth ring 10 are relatively rotated when power is provided, the sealing mode is a skeleton oil seal 13, and the lubrication mode of the first bearing seat 7 and the second bearing seat 12 is grease lubrication.

[0029] The hammer shaft 1 assembly for the crusher involved in the present embodiment is simple and efficient in operation after a long period of high-intensity operation. First, the shaft 1 bearing seat, shaft 1 bearing and labyrinth ring 10 and other related parts need to be carefully disassembled in sequence. This process needs to follow the standard steps of equipment disassembly to ensure the integrity and reusability of each component. After completing the above pre-disassembly work, only the bolts on the expansion sleeve 11 need to be loosened step by step, and the old tooth seat can be successfully disassembled from the shaft 1. Then, the brand new tooth seat is accurately installed in the corresponding position, and the bolts on the expansion sleeve 11 are tightened according to the specified torque requirements, so that it is tightly fixed on the shaft 1, thereby completing the replacement of the tooth seat. The whole replacement process is clear and easy to operate, without the need for complex special equipment or a large amount of manpower investment. Not only does it greatly reduce the work intensity of maintenance personnel, but it also effectively shortens the equipment downtime maintenance time, significantly saves energy and maintenance costs, effectively guarantees the efficient and stable operation of the crusher, and reduces production delays and economic losses caused by tedious and lengthy maintenance work.

[0030] The hammer shaft 1 assembly for the crusher using the above implementation scheme has the following functions and advantages:

[0031] First, the first tooth seat 2, the second tooth seat 3, the third tooth seat 4 and the fourth tooth seat 5 are connected to the shaft 1 through the expansion sleeve 11. This connection method not only ensures the stable installation of the tooth seat on the shaft 1, but also provides great convenience when replacing the tooth seat. Simply loosen the bolts on the expansion sleeve 11, and the old tooth seat can be easily disassembled. After installing the new tooth seat, tighten the bolts again to greatly reduce the time and labor cost of equipment maintenance, improve overall work efficiency, and effectively save energy.

[0032] Secondly, the spacer plates 17 between the tooth seats and the positioning connection method through the positioning holes and the pins 19 make the relative positions between the tooth seats more accurate and stable, which helps to ensure that the cutters on each tooth seat can work cooperatively during the operation of the crusher, accurately crush the materials, thereby improving the quality and effect of crushing and ensuring that the uniformity of the particle size of the crushed materials meets the production requirements.

[0033] Furthermore, the self-aligning roller bearings are used as the rotating parts at both ends of the shaft 1, which can well adapt to the uneven force and slight deflection of the shaft 1 during the working process, effectively reduce the wear of the shaft bearing, prolong the service life of the shaft bearing, and further reduce the maintenance frequency and cost of the equipment. At the same time, the sealing design of the labyrinth ring 10 and the skeleton oil seal 13 matched with the bearing seat can effectively prevent dust, impurities and other foreign matters from entering the bearing, ensure the normal lubrication environment of the bearing, further improve the reliability and stability of the bearing, and ensure the continuous and stable operation of the entire hammer shaft assembly of the crusher. In addition, the first bearing seat 7 and the second bearing seat 12 adopt the grease lubrication mode, which is simple to operate and has good lubrication effect, can meet the lubrication demand of the equipment during the long-time operation, and reduces the failure probability caused by poor lubrication.

[0034] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hammer shaft assembly for a shredder comprising a first knife holder seat (2), a second knife holder seat (3), a third knife holder seat (4), a fourth knife holder seat (5), a bushing (11) and a shaft (1), characterized in that: The first cutter tooth seat (2), the second cutter tooth seat (3), the third cutter tooth seat (4) and the fourth cutter tooth seat (5) are internally bored and finished, and are connected with the shaft (1) through the expansion sleeve (11).

2. The hammer shaft assembly for a shredder of claim 1, wherein: The first cutter tooth seat (2) and the second cutter tooth seat (3), the second cutter tooth seat (3) and the third cutter tooth seat (4), and the third cutter tooth seat (4) and the fourth cutter tooth seat (5) are respectively provided with a spacing plate (17). The first cutter tooth seat (2), the second cutter tooth seat (3), the third cutter tooth seat (4), the fourth cutter tooth seat (5) and the spacing plate (17) are provided with positioning holes, and the first cutter tooth seat (2), the second cutter tooth seat (3), the third cutter tooth seat (4), the fourth cutter tooth seat (5) and the spacing plate (17) are positioned and connected by punching pins (19) into the positioning holes. A third round nut (20) is arranged at one end away from the first cutter tooth seat (2), and a fourth round nut (21) is arranged at one end away from the fourth cutter tooth seat (5).

3. The hammer shaft assembly for a shredder of claim 2, wherein: Both ends of the shaft (1) are provided with bearings (6), and the upper and lower ends of one end of the bearing (6) are respectively provided with a first bearing seat (7), and one end of the bearing (6) is installed in the first bearing seat (7). One end of the first bearing seat (7) is provided with an end cover (8), a positioning ring (9) is arranged between the first bearing seat (7) and one end of the bearing (6), a first round nut (14) is arranged close to the end cover (8) at one end of the bearing (6), the first round nut (14) is connected with the shaft (1) through threads, a thrust washer (15) is arranged between one end of the bearing (6) and the first round nut (14), the shaft (1) is prevented from loosening by cooperating with the thrust washer (15) through a key groove on the shaft (1), a labyrinth ring (10) is arranged on one side of the first bearing seat (7) away from the end cover (8), a skeleton oil seal (13) is used for sealing, and the labyrinth ring (10) is connected with the shaft (1) through transition fit. The upper and lower ends of the other end of the bearing (6) are respectively provided with a second bearing seat (12), and the other end of the bearing (6) is installed in the second bearing seat (12). One end of the second bearing seat (12) is provided with the labyrinth ring (10), a skeleton oil seal (13) is used for sealing, the positioning ring (9) is arranged between the second bearing seat (12) and the other end of the bearing (6), the other end of the second bearing seat (12) is provided with a transparent cover (16), the positioning ring (9) is arranged between the transparent cover (16) and the other end of the bearing (6), the second round nut (18) and the thrust washer (15) are arranged on one end of the transparent cover (16) away from the second bearing seat (12) and are coaxially arranged on the shaft (1), and the skeleton oil seal (13) is used for sealing between the second round nut (18) and the transparent cover (16).

4. The hammer shaft assembly for a shredder of claim 3, wherein: The bearing (6) is a self-aligning roller bearing.

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