Novel single-blade shaft type roller hob

Abstract

The utility model belongs to the field of roller hobbing cutters, and provides a novel single-blade shaft type roller hobbing cutter which comprises a cutter body, a cutter ring, a cutter ring clamping ring, a cutter shaft, a main steel bowl, a first cylindrical roller, a floating seal and an end cover. A second cylindrical roller is arranged on the middle shaft shoulder, a middle steel bowl used for supporting the second cylindrical roller in a rolling mode is arranged on the outer side of the middle shaft shoulder, and locking rings are arranged on the peripheral sides of the two end covers on the cutter shaft. The second cylindrical roller and the middle steel bowl are arranged at the position of the central shaft shoulder, so that the load capacity of the hob can be further improved, the hob shaft, the floating seal, the end cover, the first cylindrical roller and the main steel bowl can be integrally assembled firstly and then assembled in the integrated mounting groove of the hob body, and the two locking rings are used for axially limiting and completing assembly. Design is reasonable and maintenance and replacement are convenient.

Description

Technical Field

[0001] The utility model belongs to the field of roller cutters, and particularly relates to a new type of single-edge shaft-type roller cutter. Background Technique

[0002] A shield machine is a special construction machinery for tunnel excavation. Modern shield tunneling machines integrate optics, mechanics, electricity, hydraulics, sensing, and information technologies, and have functions such as excavating and cutting soil bodies, transporting soil residues, assembling tunnel linings, and measuring and guiding deviation correction. A plurality of roller cutters distributed regularly are usually arranged on the cutter head of the shield machine. As the main tunneling tool, the roller cutter generally includes a cutter body, a cutter ring, an end cover, a cutter shaft, a floating seal, and a bearing, etc.

[0003] The existing patent CN209855794U discloses a heavy-duty roller cutter for composite strata, which includes a cutter ring, a cutter ring snap ring, a cutter body, a cylindrical roller bearing, and a cutter shaft. The cutter ring is fixed on the cutter body through the cutter ring snap ring. The cutter body is sleeved on the cutter shaft through a cylindrical roller bearing. Two symmetrically arranged cylindrical roller bearings are sleeved on the cutter shaft, and a thrust bearing retaining ring is arranged between the two cylindrical roller bearings. The thrust bearing retaining ring is sleeved on the cutter shaft. The outer edge of the thrust bearing retaining ring is convexly shaped, and tapered balls are arranged between the thrust bearing retaining ring and the cylindrical roller bearing. This roller cutter uses tapered balls instead of tapered roller bearings, improving the load performance of the roller cutter, but there is still room for improvement in its load. Moreover, due to the structural characteristics of the shaft shoulder inside the cutter body, the cylindrical roller bearing and the cutter shaft can only be assembled and locked from one side of the cutter body, which is not conducive to improving the assembly efficiency. Content of the Utility Model

[0004] Aiming at the technical problems existing in the above-mentioned roller cutter, the utility model provides a new type of single-edge shaft-type roller cutter with reasonable design, simple structure, high load capacity, capable of realizing integral assembly of internal structures and facilitating maintenance and replacement.

[0005] To achieve the above object, the technical solution adopted by the present utility model is that a novel single-edge shaft-type roller hob provided by the present utility model includes a cutter body. A cutter ring and a cutter ring snap ring are arranged on the outer side of the cutter body. A cutter shaft is arranged in the center of the cutter body. A convex intermediate shaft shoulder is arranged in the middle of the cutter shaft. Main steel bowls are arranged on both sides of the intermediate shaft shoulder. Three circles of first cylindrical rollers are arranged on the inner side of the main steel bowls. A floating seal and an end cover are arranged on the main steel bowls in the direction away from the intermediate shaft shoulder. The end cover is connected to the cutter shaft by screws. The inside of the cutter body is an integrally installed groove that is symmetric about the left and right. Two circles of second cylindrical rollers that are axially symmetrically distributed are arranged on the intermediate shaft shoulder. An intermediate steel bowl for rolling and supporting the second cylindrical rollers is arranged on the outer side of the intermediate shaft shoulder. A positioning shaft shoulder connected to the end cover is arranged on the cutter shaft. An assembly cavity for assembling the first cylindrical rollers is formed between the positioning shaft shoulder and the intermediate shaft shoulder. A ring cavity for installing the floating seal is formed by the positioning shaft shoulder, the end cover and the main steel bowl. Locking rings are arranged on the outer peripheral sides of the two end covers on the cutter shaft. The inner wall of the locking ring is axially limited and matched with the main steel bowl. One end of the locking ring facing the center of the cutter body is nested and clamped with the integrally installed groove.

[0006] Preferably, the integrally installed groove includes a main groove section. Card slot sections are arranged on both sides of the main groove section. An embedded groove section is arranged at one end of the card slot section facing away from the main groove section. A sunk mouth section is arranged at the end of the embedded groove section.

[0007] Preferably, the locking ring includes a main ring body. The main ring body is nested in the embedded groove section. A flange that cooperates with the card slot section is arranged at the end of the main ring body. An end plate that cooperates with the sunk mouth section is arranged at the other end of the main ring body. A plurality of pry openings are arranged at positions near the edge of the end plate.

[0008] Preferably, a sealing ring is arranged on the mating surface of the main steel bowl and the main groove section.

[0009] Preferably, a positioning groove is arranged on the end face of the main steel bowl. The positioning groove is inserted and fitted with the end of the end cover.

[0010] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0011] 1. For the novel single-edge shaft-type roller hob provided by the present utility model, the use of the second cylindrical rollers and the intermediate steel bowl at the position of the central shaft shoulder can further improve the load capacity of the hob. Moreover, the cutter shaft, the floating seal, the end cover, the first cylindrical rollers and the main steel bowl can be integrally assembled first and then assembled into the integrally installed groove of the cutter body. Finally, the two locking rings are used for axial positioning and the assembly is completed. The design is reasonable and convenient for maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0013] Figure 1 A cross-sectional view of a novel single-edge shaft-type roller hob provided for the embodiment in the E-E direction;

[0014] Figure 2 A front view of a novel single-edge shaft-type roller hob provided for the embodiment;

[0015] Figure 3 For Figure 1 An enlarged schematic view of the A structure in

[0016] In the above figures, 1, cutter ring; 2, cutter ring snap ring; 3, cutter body; 31, integral installation groove; 311, main groove section; 312, card slot section; 313, embedded groove section; 314, sunk opening section; 4, cutter shaft; 41, intermediate shaft shoulder; 42, positioning shaft shoulder; 5, main steel bowl; 6, first cylindrical roller; 7, floating seal; 8, end cover; 9, screw; 10, second cylindrical roller; 11, intermediate steel bowl; 12, locking ring; 121, main ring body; 122, flange; 123, end plate; 124, pry mounting opening; 13, sealing ring; 14, positioning groove. Specific embodiments

[0017] In order to more clearly understand the above-mentioned objects, features, and advantages of the present utility model, the following further describes the present utility model in conjunction with the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. For the convenience of narration, words such as "upper", "lower", "left", and "right" hereinafter only indicate the same direction as the upper, lower, left, and right directions of the drawings themselves, and do not limit the structure.

[0018] Many specific details are set forth in the following description to facilitate a thorough understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0019] Embodiments, such as Figure 1 , Figure 2 and Figure 3As shown in the figure, a new type of single-edge shaft-type roller hob provided by the utility model includes a cutter body 3. A cutter ring 1 and a cutter ring snap ring 2 are arranged on the outer side of the cutter body 3. A cutter shaft 4 is arranged at the center of the cutter body 3. A convex intermediate shaft shoulder 41 is arranged in the middle of the cutter shaft 4. Main steel bowls 5 are arranged on both sides of the intermediate shaft shoulder 41. Three circles of first cylindrical rollers 6 are arranged on the inner side of the main steel bowls 5. A floating seal 7 and an end cover 8 are arranged on the main steel bowls 5 in the direction away from the intermediate shaft shoulder 41. The end cover 8 is connected to the cutter shaft 4 through a screw 9. Among them, the main steel bowls 5 can roll and support all the first cylindrical rollers 6 on their inner sides. In order to improve the load performance of this hob, the utility model arranges two circles of axially symmetrically distributed second cylindrical rollers 10 on the intermediate shaft shoulder 41. An intermediate steel bowl for rolling and supporting the second cylindrical rollers 10 is arranged on the outer side of the intermediate shaft shoulder 41. Both ends of the intermediate steel bowl are butted against the two main steel bowls 5 and maintain a basically unified outer peripheral surface. The second cylindrical rollers 10 replace the original tapered rollers. The radial load capacity of cylindrical rollers with a similar width series is greater than that of tapered rollers. Therefore, the actual load capacity of this hob can be improved. It should be noted that if the intermediate steel bowl is not used, the inner wall of the cutter body 3 rolls and supports the second cylindrical rollers 10, and the intermediate shaft shoulder 41 and the cutter body 3 are in interference fit. By adjusting the interference amount, the hob can operate with a small torque and a high load.

[0020] Furthermore, the inside of the cutter body 3 provided by the utility model is an integrally installed groove 31 that is symmetric about the left and right. A positioning shaft shoulder 42 connected to the end cover 8 is arranged on the cutter shaft 4. An assembly cavity for assembling the first cylindrical rollers 6 is formed between the positioning shaft shoulder 42 and the intermediate shaft shoulder 41. The positioning shaft shoulder 42, the end cover 8 and the main steel bowls 5 form an annular cavity for installing the floating seal 7. Locking rings 12 are arranged on the outer peripheral sides of the two end covers 8 on the cutter shaft 4. The inner wall of the locking ring 12 is axially limited and matched with the main steel bowls 5. One end of the locking ring 12 facing the center of the cutter body 3 is nested and clamped with the integrally installed groove 31. Among them, the structural characteristics of the assembly cavity and the annular cavity can ensure the sealing of the grease between the cylindrical rollers and the dynamic sealing of the floating seal. Most importantly, the cutter shaft 4, the floating seal 7, the end cover 8, the first cylindrical rollers 6 and the main steel bowls 5 can be first integrally assembled and then assembled into the integrally installed groove 31 of the cutter body 3. Finally, the two locking rings 12 are locked at both ends of the cutter body 3 for axial limitation. In this way, the integrated assembly can be completed. The design is reasonable and convenient for maintenance and replacement, which is conducive to promoting the work progress of the tunneling operation to a certain extent.

[0021] To improve the assembly performance of this hob, the integrally installed groove 31 provided by the present utility model includes a main groove section 311. On both sides of the main groove section 311, there are card slot sections 312. At one end of the card slot section 312 facing away from the main groove section 311, there is an embedded groove section 313. At the end of the embedded groove section 313, there is a countersunk section 314. Among them, the groove wall of the main groove section 311 cooperates with the outer peripheral surface of the main steel bowl 5 and the outer peripheral surface of the intermediate steel bowl. The embedded groove section 313 and the countersunk section 314 are matched with the locking ring 12.

[0022] To improve the practicality of the locking ring 12, the locking ring 12 provided by the present utility model includes a main ring body 121. The main ring body 121 is nested in the embedded groove section 313. At the end of the main ring body 121, there is a flange 122 that cooperates with the card slot section 312. At the other end of the main ring body 121, there is an end plate 123 that cooperates with the countersunk section 314. The locking ring 12 can be pressed at both ends of the cutter body 3 by a press-fitting method. Its flange 122 is stuck in the card slot section 312, and the end plate 123 is fixed in the countersunk section 314 in a countersunk head installation manner. To facilitate disassembly and assembly, the end plate 123 provided by the present utility model is provided with a plurality of prying ports 124 near its edge. The prying ports 124 provide prying fulcrums, facilitating the use of tools to pry up the locking ring 12.

[0023] To reduce the probability of lubricating grease leakage, a sealing ring 13 is provided on the mating surface between the main steel bowl 5 and the main groove section 311. The sealing ring 13 cooperates with the structural groove on the main steel bowl 5, and the sealing ring 13 compensates for part of the machining error between the main steel bowl 5 and the main groove section 311 to further reduce the probability of lubricating grease leakage between the main steel bowl 5 and the main groove section 311.

[0024] To improve the assembly performance of the end cover 8 and the main steel bowl 5, the present utility model provides a positioning groove 14 on the end face of the main steel bowl 5. The positioning groove 14 is inserted and fitted with the end of the end cover 8. At the same time, this is also beneficial to improving the sealing performance at the floating seal and ensuring the working performance of this hob.

[0025] The above are only the preferred embodiments of the present utility model, and are not limitations on the present utility model in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present utility model, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A novel single-edged shaft roller cutter comprises a cutter body, a cutter ring and a cutter ring retaining ring are arranged on the outside of the cutter body, a cutter shaft is arranged in the center of the cutter body, a convex intermediate shaft shoulder is arranged in the middle of the cutter shaft, main steel bowls are arranged on both sides of the intermediate shaft shoulder, three circles of first cylindrical rollers are arranged on the inner side of the main steel bowl, a floating seal and an end cover are arranged on the main steel bowl in the direction away from the intermediate shaft shoulder, and the end cover is connected to the cutter shaft by screws, characterized in that: The interior of the cutter body is an integrated mounting groove that is bilaterally symmetrical, and the intermediate shoulder is provided with two circles of axially symmetrically distributed second cylindrical rollers. An intermediate steel bowl for rolling support of the second cylindrical roller is provided on the outer side of the intermediate shoulder. A positioning shoulder connected to the end cover is provided on the cutter shaft, and an assembly cavity for assembling the first cylindrical roller is formed between the positioning shoulder and the intermediate shoulder. The positioning shoulder, the end cover and the main steel bowl constitute an annular cavity for installing a floating seal. Locking rings are provided on the outer circumference of the two end covers on the cutter shaft, and the inner wall of the locking ring is matched with the axial limit of the main steel bowl. The end of the locking ring facing the center of the cutter body is nested and clamped in the integrated mounting groove.

2. A new type of single-edge shaft roller cutter according to claim 1, characterized in that: The integrated installation groove comprises a main groove section, and clamping groove sections are arranged on both sides of the main groove section. An embedding groove section is arranged at one end of the embedding groove section facing away from the main groove section, and a countersunk section is arranged at the end of the embedding groove section.

3. A new type of single-edge shaft roller cutter according to claim 2, characterized in that: The locking ring includes a main ring body, which is nested in the embedding groove section. The end of the main ring body is provided with a flange that cooperates with the slot section. The other end of the main ring body is provided with an end plate that cooperates with the countersunk section. The end plate is provided with multiple prying openings near its edge.

4. A new type of single-edge shaft roller cutter according to claim 3, characterized in that: A sealing ring is arranged on the matching surface of the main steel bowl and the main groove section.

5. A new type of single-edge shaft roller cutter according to claim 4, characterized in that: The end surface of the main steel bowl is provided with a positioning groove, and the positioning groove is inserted and matched with the end of the end cover.

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