Structure for rapidly replacing roller body of crushing roller

Abstract

The utility model discloses a structure for quickly replacing a roller body of a crushing roller, end face flanges are fixed at the two ends of the crushing roller body, a centering counter bore is formed in the center of each end face flange, and flange key grooves are symmetrically formed in the two sides of each centering counter bore; a roll shaft connecting disc is arranged at the root of the crushing roll shaft, a centering boss is arranged in the center of the inner end face of the roll shaft connecting disc, and roll shaft key grooves are formed in the two sides of the centering boss; the centering boss of the roll shaft connecting disc is embedded into the centering counter bore of the end face flange, and the flange key groove is connected with the roll shaft key groove through a key; a pull rod is arranged in a center hole of the crushing roller shaft, the inner end of the pull rod is screwed into a flange center screw hole, a pull rod nut is screwed to an outer end threaded section of the pull rod, the inner end face of the pull rod nut is pressed on a hardened gasket, and the hardened gasket is pressed on the outer end face of the crushing roller shaft; the pull rod nut is symmetrically screwed with jacking screws along the axial direction; and the inner end heads of the jacking screws are pressed on the outer end surface of the crushing roller shaft. The structure only needs to replace the roller body, the shaft head and the like without dismounting, so that the workload is greatly reduced.

Description

Technical Field

[0001] The utility model relates to a toothed roller crusher, in particular to a structure for quickly replacing a roller body of a crushing roller, and belongs to the technical field of toothed roller crushers. Background Art

[0002] The toothed roller crusher shears and crushes the material through the interaction of a pair of rollers with teeth on the surface. After using for a period of time, the teeth on the roller surface are worn and cannot crush the material better. At this time, the crushing roller needs to be removed for wire drawing. Wire drawing is a process of repairing the roller teeth.

[0003] The roller body and shaft head of the traditional crushing roller are integrated. The coaxiality requirements of the shaft head and the roller body are controlled through overall processing. The shaft head and the roller body are connected by bolts to transmit torque. This is because conventional processing methods and process capabilities determine that the shaft head and the roller body must be integrated and cannot be a split structure. When drawing the crushing roller, all parts related to its installation need to be removed, such as bearings, bearing seats, seals, fixed wall panels, drive pulleys and belts, etc. The removal and installation workload is large, time-consuming and labor-intensive, and also affects the start-up rate of the production line.

[0004] The traditional structure has the following problems when replacing the roller body: 1. The overall replacement of the crushing roller requires a lot of disassembly and installation work, which requires a long time of downtime, affecting the continuity of production, and reducing the start-up rate and equipment efficiency of the production line;

[0005] 2. The workload is large during disassembly, and many parts need to be disassembled, which is time-consuming and laborious. It is easy to damage the bearings or other parts during disassembly;

[0006] 3. During installation, it is necessary to readjust the bearing clearance, parallelism and position of the pulley, etc., and new equipment failures may occur due to improper installation;

[0007] 4. The crushing roller is scrapped because the alloy layer is worn to a certain extent, but the shaft head is good and cannot be reused, which causes great waste and high cost. Utility Model Content

[0008] The purpose of the utility model is to overcome the problems existing in the prior art and provide a structure for quickly replacing the roller body of a crushing roller, which can quickly replace the roller and only needs to replace the roller body. The peripheral related parts of the roller body including the shaft head do not need to be disassembled, which greatly reduces the workload and shortens the production downtime caused by roller replacement, so that the impact on production continuity is reduced to a small extent and the efficiency is higher.

[0009] In order to solve the above technical problems, the utility model provides a structure for quickly replacing the roller body of a crushing roller, comprising a crushing roller body and a crushing roller shaft connected to both ends of the crushing roller body, wherein the middle section of the crushing roller shaft is supported in corresponding bearing seats through bearings respectively, and end face flanges are fixed at both ends of the crushing roller body, a centering countersunk hole is provided at the center of the end face flange, a flange center screw hole is provided at the center of the bottom wall of the centering countersunk hole, and flange key grooves are symmetrically provided on both sides of the centering countersunk hole;

[0010] A roller shaft connecting plate is provided at the root of the crushing roller shaft, a centering boss is provided at the center of the inner end surface of the roller shaft connecting plate, and roller shaft keyways are provided on both sides of the centering boss; the centering boss of the roller shaft connecting plate is embedded in the centering countersunk hole of the end face flange, and the flange keyway is connected to the roller shaft keyway through a key;

[0011] A pull rod is provided in the center hole of the crushing roller shaft, the inner end of the pull rod is screwed into the center screw hole of the flange, the outer end threaded section of the pull rod is screwed with a pull rod nut, the inner end surface of the pull rod nut is pressed on the hardened washer, and the hardened washer is pressed on the outer end surface of the crushing roller shaft; the pull rod nut is screwed with a tightening screw symmetrically along the axial direction, and the inner end of the tightening screw is pressed on the outer end surface of the crushing roller shaft.

[0012] Furthermore, one end of the bearing seat close to the crushing roller body is a positioning end, and the other end is a floating end. The inner end face of the bearing abuts against the positioning end of the bearing seat, and the outer end face of the bearing is limited by a stop screw. The stop screw is screwed on the top of the floating end of the bearing seat and fixed by a locking nut.

[0013] Furthermore, the outer end surface of the crushing roller shaft is symmetrically provided with a connecting screw hole extending along the axial direction for the connecting screw to be screwed.

[0014] Furthermore, the outer end of the pull rod is provided with a hexagonal head or a square tenon.

[0015] Compared with the prior art, the utility model has achieved the following beneficial effects: 1. The roller body can be quickly replaced without disassembling the shaft head, bearing, bearing seat and pulley on the crushing roller, which reduces the workload on site and reduces the intensity of roller replacement by 70%. The previous workload of one day can now be replaced in about 2 hours, and the roller replacement time is reduced by 70%;

[0016] 2. Since it is no longer necessary to disassemble the bearings, pulleys, peripheral parts, etc. when replacing the crushing roller, there will be no damage to related parts;

[0017] 3. No need to adjust the bearing clearance or the position of the pulley during installation;

[0018] 4. The pulley does not need to be disassembled, and the thread will not be damaged due to the disassembly of the fastening bolts, which will lead to the replacement of the pulley;

[0019] 5. There is no time and workload required for disassembly and assembly of peripheral parts such as bearings and pulleys, so the downtime is short and the production loss is small;

[0020] 6. The cost of purchasing crushing rollers is reduced, because the roller body and shaft head can be purchased separately as needed, reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. The accompanying drawings are only provided for reference and explanation and are not intended to limit the present invention.

[0022] Figure 1 This is a front view of the structure of the crushing roller for quickly replacing the roller body of the utility model;

[0023] Figure 2 for Figure 1 A top view of

[0024] Figure 3 for Figure 1 A partial enlarged view of the left end;

[0025] Figure 4 This is the state diagram when the crushing roller shaft and the end face flange are separated;

[0026] In the figure: 1. Crushing roller body; 2. End flange; 3. Positioning screw; 4. Key; 5. Crushing roller shaft; 6. Bearing seat; 7. Hardened washer; 8. Tie rod nut; 9. Jacking screw; 10. Tie rod; 11. Bearing seal ring; 12. Adapter sleeve; 13. Stop screw; 14. Locking nut; 15. Oil pipe joint; 16. Bearing; 17. Thrust ring; 18. Connecting screw; 19. Connecting nut; 20. Jacking screw plate; 21. Center screw. DETAILED DESCRIPTION

[0027] In the following description of the utility model, the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not mean that the device must have a specific direction.

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] like Figures 1 to 3 As shown, the structure of the crushing roller for quick replacement of the roller body of the utility model comprises a crushing roller body and a crushing roller shaft connected to both ends of the crushing roller body, the middle section of the crushing roller shaft is supported in the corresponding bearing seat through bearings respectively, and end face flanges are fixed at both ends of the crushing roller body. The key to achieving quick replacement is the quick alignment and connection of the crushing roller shaft and the end face flange, as well as the quick and convenient separation.

[0031] There is a centering countersunk hole in the center of the end face flange 2, and there are two symmetrical flange keyways next to the centering countersunk hole. The end face flange 2 is fixed to the countersunk holes at both ends of the crushing roller body 1 by hexagon socket countersunk screws, forming a component with the crushing roller body 1. The subsequent quick replacement is to replace this component.

[0032] A roller shaft connecting plate is provided at the root of the crushing roller shaft 5, and a centering boss is processed at the center of the inner end face of the roller shaft connecting plate. Roller shaft keyways are provided on both sides of the centering boss, and two keys are fixed in the roller shaft keyways by hexagon socket screws. When installed below, the crushing roller shaft 5 and the end face flange 2 are tightly connected together by the tie rod 10 and the tie rod nut 8. The centering boss and the two installed keys on the crushing roller shaft 5 correspond to the centering countersunk holes and flange keyways on the end face flange 2, and ensure the concentricity between the two and transmit the rotational torque to the crushing roller body 1. Through the cooperation of the crushing roller shaft 5 and the end face flange 2, a quick connection and separation state is achieved.

[0033] A bearing 16 is installed on the crushing roller shaft 5. The space for the bearing 16 to move axially outward is relatively large, about 35 mm. The outer ring of the bearing is against the positioning end of the bearing seat through a thrust ring 17. The outer side of the bearing 16 is limited by the inner end of the stop screw 13. The bearing 16 can be axially fixed at the positioning end of the bearing seat by screwing in the stop screw 13 and tightening the locking nut 14.

[0034] An oil pipe joint 15 is provided in the middle of the bearing seat 6 to facilitate the injection of lubricating oil into the bearing 16. A tightening sleeve 12 is provided on the outer side of the inner ring of the bearing, and bearing sealing rings 11 are provided at both ends of the bearing seat.

[0035] When the crushing roller shaft 5 needs to be separated from the end face flange 2, just loosen the stop screw 13 and the locking nut 14 and withdraw them about 10 mm, then loosen and remove the pull rod nut 8, and then move the crushing roller shaft 5 to the left by hand or with a disassembly tool to separate the crushing roller shaft 5 from the end face flange 2.

[0036] Roller disassembly process:

[0037] First, use another tooling trolley to support the crushing roller body 1, then use a socket wrench to loosen the tightening screws 9 one by one, remove the tie rod nut 8 and the hardened washer 7 by hand, then loosen the locking nut 14, and screw out the stop screw 13 about 10 mm. At this time, the crushing roller shaft 5 and the end face flange 2 have been loosened. Because the outer ring of the bearing 16 and the bearing seat 6 are clearance-fitted, you can directly pull the pulley (not shown) on the crushing roller shaft 5 by hand to move the crushing roller shaft 5 relative to the end face flange 2 to separate the two.

[0038] like Figure 4 As shown, if it cannot be pulled by hand, the connecting screw 18, the connecting nut 19 and the top screw plate 20 can be installed on the outer end of the crushing roller shaft 5, so that the top screw plate 20 is fixedly connected to the shaft end of the crushing roller shaft 5 through the connecting screw 18 and the connecting nut 19, and the center screw 21 is screwed into the center screw hole of the top screw plate 20, so that the inner end of the center screw 21 is against the center of the end of the pull rod 10. By screwing the center screw 21 to support the pull rod 10, the crushing roller shaft 5 is moved outward and separated relative to the end face flange 2, and then the pull rod 10 is removed with a wrench, and the crushing roller body 1 on the tooling trolley is pulled out of the machine body, and the new crushing roller body 1 is hoisted and replaced.

[0039] Roller installation operation process:

[0040] The end face flange 2 is inserted into the countersunk holes at both ends of the crushing roller body 1, and the end face flange 2 is fixed to the shaft end of the crushing roller body 1 by countersunk screws, and the positioning screws 3 are respectively screwed into the outer sides of the keyways on both sides of the centering countersunk holes. The positioning screws 3 are close to the outer edge of the end face flange 2 to facilitate accurate knowledge of the phase of the keyway when the crushing roller shaft 5 is subsequently connected.

[0041] The assembly of the new crushing roller body 1 and the end face flange 2, which have been finished with external wire drawing, is hoisted and placed on another tooling trolley and sent into the body. The centering countersunk hole of the end face flange 2 is aligned with the centering boss of the crushing roller shaft 5. The tie rod 10 passes through the center hole of the crushing roller shaft 5, and the inner end is tightened in the flange center screw hole of the end face flange 2. The outer end of the tie rod 10 is provided with a hexagonal head or a square tenon for easy rotation. At this time, it should be noted that any one of the two positioning screws 3 on the end face flange 2 should be aligned with the position of the key 4 on the crushing roller shaft 5 to ensure that the key 4 on the crushing roller shaft 5 and the keyway on the end face flange 2 are aligned.

[0042] First, push the pulley (not shown) installed on the crushing roller shaft 5 by hand to make the centering boss on the crushing roller shaft 5 initially enter the centering countersunk hole on the end face flange 2, install the hardened washer 7 and the tie rod nut 8, and use a hook wrench to turn the tie rod nut 8 to completely press the centering boss of the crushing roller shaft 5 into the centering countersunk hole on the end face flange 2 through the tie rod 10, screw in the stop screw 13 to the position before disassembly until it can't be turned, then tighten the locking nut 14, locate the axial position of the bearing 16, and then reverse the tie rod nut 8 to make a gap of 1 to 2 mm with the hardened washer 7, and then use a socket wrench to symmetrically tighten the top screws 9 on the tie rod nut 8 according to the required tightening torque, and the installation is completed.

[0043] In the past, replacing the crushing roller required the removal of many peripheral parts such as the belt, pulley, bearing, and outer cover, which was time-consuming and labor-intensive, and caused great losses due to long-term production downtime. The workload of reinstalling parts and re-adjusting was also very large, such as the installation and position correction of the pulley, the adjustment of the clearance after the bearing was installed, and the installation of the bearing seat. Parts may also be damaged during the disassembly and assembly process, such as damage to the bolt hole, damage to the cone sleeve, damage to the bearing, etc. during the disassembly and assembly process of the pulley.

[0044] If this structure is used instead, the above problems can be solved. The workload that used to take a day can now be completed in 2 hours, which greatly reduces the workload and work intensity of the staff and reduces the losses caused by production downtime.

[0045] The above description is only the preferred feasible embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model, but does not limit the scope of patent protection of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. In addition to the above embodiments, the utility model can also have other implementation modes without departing from the spirit and scope of the utility model. The utility model will also have various changes and improvements. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents. The technical features not described in the utility model can be achieved by or using existing technologies, which will not be repeated here.

Claims

1. A structure for quickly replacing a crushing roller, comprising a crushing roller and a crushing roller shaft connected to both ends of the crushing roller, wherein the middle section of the crushing roller shaft is supported in a corresponding bearing seat through bearings, and characterized in that: The two ends of the crushing roller body are fixed with end face flanges, the center of the end face flange is provided with a centering countersunk hole, the center of the bottom wall of the centering countersunk hole is provided with a flange center screw hole, and flange keyways are symmetrically provided on both sides of the centering countersunk hole; A roller shaft connecting plate is provided at the root of the crushing roller shaft, a centering boss is provided at the center of the inner end surface of the roller shaft connecting plate, and roller shaft keyways are provided on both sides of the centering boss; the centering boss of the roller shaft connecting plate is embedded in the centering countersunk hole of the end face flange, and the flange keyway is connected to the roller shaft keyway through a key; A pull rod is provided in the center hole of the crushing roller shaft, the inner end of the pull rod is screwed into the center screw hole of the flange, the outer end threaded section of the pull rod is screwed with a pull rod nut, the inner end surface of the pull rod nut is pressed on the hardened washer, and the hardened washer is pressed on the outer end surface of the crushing roller shaft; the pull rod nut is screwed with a tightening screw symmetrically along the axial direction, and the inner end of the tightening screw is pressed on the outer end surface of the crushing roller shaft.

2. The structure for quickly replacing the crushing roller according to claim 1 is characterized in that: One end of the bearing seat close to the crushing roller body is the positioning end, and the other end is the floating end. The inner end face of the bearing abuts against the positioning end of the bearing seat, and the outer end face of the bearing is limited by a stop screw. The stop screw is screwed on the top of the floating end of the bearing seat and fixed by a locking nut.

3. The structure for quickly replacing the crushing roller according to claim 1 is characterized in that: The outer end surface of the crushing roller shaft is symmetrically provided with a connecting screw hole extending along the axial direction for the connecting screw to be screwed.

4. The structure for quickly replacing the crushing roller according to claim 1, 2 or 3, characterized in that: The outer end of the pull rod is provided with a hexagonal head or a square tenon.

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