Plane bearing center duplex hob
By adopting a plane bearing structure and a floating oil seal, the problems of high cost and easy damage of imported thrust bearings are solved, achieving the effect of reducing costs and increasing bearing pressure.
Patent Information
- Application Number
- CN202422912895.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-11-28
AI Technical Summary
The existing center double hob uses imported thrust bearings, which are expensive and have a small shaft diameter due to the bearing structure, insufficient bearing pressure, and are easily damaged.
It adopts a plane bearing structure, connecting the hob shaft through the female shaft and the male shaft to form an integral structure, replacing the imported thrust bearing, and combined with a floating oil seal to prevent dust from entering.
The production cost of the hob is reduced, the pressure bearing capacity of the bearing is improved, damage is prevented, and the service life is extended.
Smart Images
Figure CN223317851U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of shield machine roller cutters, in particular to a plane bearing center double roller cutter. Background Art
[0002] Shield construction is commonly used in urban subways, mountain tunnels, and river tunnels. The shield machine cutterhead needs to be equipped with different tools according to different strata. The cutter installed in the center of the shield machine is a center double cutter. The center double cutters currently used on the market are 15-20 inches. The existing center double cutters used on the market all use imported thrust bearing structures. The thrust bearing is installed on the shaft. When the cutter is breaking rock, the cutter transmits the force to the thrust bearing through the cutter ring. The bearing then rotates around the cutter shaft and applies the force to the cutter shaft. This type of cutter uses imported thrust bearings during use, which are very expensive. Generally, domestic thrust bearings cannot meet the operating conditions of this type of cutter. At the same time, due to structural reasons, the shaft diameter of the thrust bearing is relatively small. When subjected to greater pressure, the shaft has relatively small bearing capacity, which can easily lead to bearing damage during use. For this purpose, we launched a double-center hob with a plane bearing structure to completely replace the imported thrust bearing structure hob, solve the problem of high hob production costs, and solve the problem of thrust bearing shaft diameter being too small to bear pressure. Utility Model Content
[0003] (1) Technical problems solved
[0004] The purpose of the utility model is to solve the problem that the cost of imported thrust bearings remains high and the general domestic thrust bearings cannot meet the working conditions. At the same time, due to structural reasons, the diameter of the shaft of the thrust bearing is relatively small. When subjected to greater pressure, the bearing pressure of the shaft is relatively small, which easily leads to bearing damage during use. A plane bearing center double hob is proposed.
[0005] (2) Technical solution
[0006] The technical solution of the utility model to solve the above technical problems is as follows:
[0007] A plane bearing center double hob comprises two wheel bodies, a center end cover is arranged between the two wheel bodies, a left end cover is arranged at the left end of the left wheel body, and a right end cover is arranged at the right end of the right wheel body, the outer sides of the two wheel bodies are fixedly connected with a cutter ring, the inner sides of the two wheel bodies are provided with a large end bearing and a small end bearing, two hob shafts are arranged on the inner sides of the two big end bearings and the two small end bearings, two plane bearings are arranged on the outer sides of the two hob shafts, a number of rollers are arranged on the inner sides of the four plane bearings, the inner sides of the two wheel bodies are connected with a female shaft by bolts, the two female shafts are hollow, the hollow parts of the two female shafts are square, and the inner sides of the two female shafts are connected with a male shaft adapted to the female shaft by bolts.
[0008] On the basis of the above technical solution, the present invention can also be improved as follows.
[0009] Preferably, floating oil seals are provided between the two wheel bodies and the central end cover, the left end cover and the right end cover.
[0010] (3) Beneficial effects
[0011] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:
[0012] The utility model provides a plane bearing, a female shaft and a male shaft, passes the female shaft and the male shaft through the center end cover, and connects them together through letter buckles and bolts, thereby connecting two separate hob shafts into a whole, forming a plane bearing structure center double hob, which completely replaces imported thrust bearing structure hobs and solves the problem of high hob production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a cross-sectional view of the utility model;
[0014] Figure 2 This is a schematic structural diagram of the relative position relationship between the center end cover and the left end cover of the utility model;
[0015] Figure 3 This is a schematic diagram of the relative position relationship between the female shaft and the male shaft of the utility model;
[0016] Figure 4 This is a structural schematic diagram of the relative position relationship between the roller and the plane bearing of the utility model.
[0017] In the figure: 1. Wheel body; 2. Center end cover; 3. Left end cover; 4. Right end cover; 5. Cutter ring; 6. Big end bearing; 7. Small end bearing; 8. Hob shaft; 9. Roller; 10. Plane bearing; 11. Female shaft; 12. Male shaft; 13. Floating oil seal. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0019] In the embodiment, Figure 1-4 A plane bearing center double hob is provided, comprising two wheel bodies 1, a center end cover 2 is arranged between the two wheel bodies 1, a left end cover 3 is arranged at the left end of the left wheel body 1, and a right end cover 4 is arranged at the right end of the right wheel body 1, the outer sides of the two wheel bodies 1 are fixedly connected with a cutter ring 5, the inner sides of the two wheel bodies 1 are provided with a large end bearing 6 and a small end bearing 7, the inner sides of the two large end bearings 6 and the two small end bearings 7 are provided with two hob shafts 8, the outer sides of the two hob shafts 8 are provided with two plane bearings 10, the inner sides of the four plane bearings 10 are provided with a number of rollers 9, the inner sides of the two wheel bodies 1 are connected with a female shaft 11 by bolts, the two female shafts 11 are hollow, the hollow parts of the two female shafts 11 are square, and the inner sides of the two female shafts 11 are connected with a male shaft 12 adapted to the female shaft 11 by bolts.
[0020] Through the above settings, four sets of plane bearings 10 are respectively installed on the outside of the two hob shafts 8, and a plane bearing 10 is installed on the left and right sides of each hob shaft 8. The inner ring of the wheel body 1 is installed with a large-end bearing 6 and a small-end bearing 7. There are several rollers 9 between the plane bearing 10 and the hob shaft 8. Several rollers 9 rotate around the hob shaft 8. The two cutter rings 5 are respectively installed on the outside of the two wheel bodies 1. The two hob shafts 8 are connected by letters. The male shaft 12 is milled square at one end and the female shaft 11 is milled square at one end. The male and female are connected by bolts and the outside is installed on the center end cover 2. The assembly process first Assemble several rollers 9 and plane bearings 10 with the male shaft 12, and then assemble the assembled male shaft 12 with the wheel body 1 by cold pressing or heat fitting, and then install the cutter ring 5 on the outer diameter of the wheel body 1 by cold pressing or heat fitting, and install the center end cover 2, the left end cover 3 and the right end cover 4. The assembly method of the female shaft 11 is the same as that of the male shaft 12. After the female shaft 11 and the male shaft 12 are assembled, pass the female shaft 11 and the male shaft 12 through the center end cover 2 through the letter buckle and then connect them together with bolts to connect the two separate hob shafts 8 into a whole.
[0021] Reference Figure 1-4 , wherein floating oil seals 13 are provided between the two wheel bodies 1 and the center end cover 2, the left end cover 3 and the right end cover 4;
[0022] With the above-mentioned structural arrangement, the floating oil seal 13 can prevent dust, soil and the like from entering the interior of the roller cutter during the roller cutter drilling process and causing damage to the internal structure.
[0023] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.
[0024] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A double hob with a plane bearing center, characterized in that: The invention comprises two wheel bodies (1), a central end cover (2) is provided between the two wheel bodies (1), a left end cover (3) is provided at the left end of the left wheel body (1), and a right end cover (4) is provided at the right end of the right wheel body (1), the outer sides of the two wheel bodies (1) are fixedly connected with a cutter ring (5), the inner sides of the two wheel bodies (1) are provided with a large end bearing (6) and a small end bearing (7), the inner sides of the two large end bearings (6) and the two small end bearings (7) are provided with two hob shafts (8), the outer sides of the two hob shafts (8) are provided with two plane bearings (10), the inner sides of the four plane bearings (10) are provided with a plurality of rollers (9), the inner sides of the two wheel bodies (1) are connected with a female shaft (11) by bolts, the two female shafts (11) are hollow, the hollow parts of the two female shafts (11) are square, and the inner sides of the two female shafts (11) are connected with a male shaft (12) adapted to the female shaft (11) by bolts.
2. A plane bearing center double hob according to claim 1, characterized in that: Floating oil seals (13) are provided between the two wheel bodies (1) and the central end cover (2), the left end cover (3) and the right end cover (4).