Boring bar supporting bearing of boring machine

Abstract

The utility model discloses a boring bar supporting bearing of a boring machine, belongs to the field of boring machines, and solves the problem of low machining precision caused by easy generation of a gap between a bearing inner sleeve of the boring bar supporting bearing of the existing boring machine and a boring bar. The bearing comprises a bearing outer sleeve, a bearing inner sleeve, a ball bearing and locking sleeves, the bearing outer sleeve is arranged on the periphery of the bearing inner sleeve in a sleeving mode, the two ends of the bearing inner sleeve are conical surfaces obliquely extending in the radial direction from outside to inside, each locking sleeve comprises a conical sleeve and a connecting flange, and the connecting flanges are fixed to one ends of the conical sleeves; the diameter of the outer wall of the conical sleeve is gradually increased along one end of the connecting flange, the outer wall face of the conical sleeve is attached to the conical face of the bearing inner sleeve, and each locking sleeve is provided with a notch extending in the axial direction of the locking sleeve. According to the boring bar supporting bearing, a gap between the supporting bearing and a boring bar can be effectively eliminated, no gap between the supporting bearing and the boring bar is guaranteed, and therefore it is guaranteed that the boring hole size and the roundness deviation value are within the design range.

Description

Technical Field

[0001] The utility model relates to the technical field of boring machines, and more specifically, to a boring rod supporting bearing of a boring machine. Background Art

[0002] In the field of ship shaft installation and construction, boring is an unavoidable process in the construction of propeller-propelled ship shafts. The support bearing of the boring equipment is one of the core components of the boring equipment. The support bearing must be both durable and precise and reliable.

[0003] The existing boring bar support bearings are generally non-adjustable bearing sleeves. During the boring process, the high-speed rotation of the boring bar and the bearing sleeve will cause friction during the disassembly and assembly process, which will cause wear and tear, and produce gaps, resulting in roundness deviations in the inner hole of the bored bracket. After the inner hole has roundness deviations, it needs to be repaired by grinding, which is time-consuming and labor-intensive, affecting quality and cycle. In addition, the inner sleeve of the bearing needs to be replaced after wear, which affects the continuity of the boring hole and increases the cost of equipment use and construction.

[0004] Therefore, it is urgent to develop and design a new type of boring machine boring bar support bearing to solve the shortcomings of the existing technology. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a boring bar support bearing of a boring machine in view of the above-mentioned deficiencies in the prior art, which can effectively eliminate the gap between the support bearing and the boring bar, ensure that there is no gap between the support bearing and the boring bar, thereby ensuring that the boring hole size and roundness deviation value are within the design range.

[0006] The technical solution of the utility model is as follows: a boring rod support bearing of a boring machine, comprising a bearing outer sleeve, a bearing inner sleeve, a ball bearing and a locking sleeve, the bearing outer sleeve is arranged on the periphery of the bearing inner sleeve, and the bearing outer sleeve and the bearing inner sleeve are clearance-matched, there are two ball bearings, and the two ball bearings are symmetrically installed between the bearing outer sleeve and the bearing inner sleeve, the two ends of the bearing inner sleeve are tapered surfaces extending from the outside to the inside and radially inclined, there are two locking sleeves, and the two locking sleeves are symmetrically inserted at the two ends of the bearing inner sleeve, each of the locking sleeves comprises a tapered sleeve and a connecting flange, the connecting flange is fixed to one end of the tapered sleeve, the outer wall diameter of the tapered sleeve gradually increases along one end of the connecting flange, the outer wall surface of the tapered sleeve is fitted with the tapered surface of the bearing inner sleeve, each of the locking sleeves is provided with a notch extending along its axial direction, and each of the locking sleeves is connected to the bearing inner sleeve by a connecting bolt.

[0007] As a further improvement, the inner rings of the two ball bearings are symmetrically mounted on the two ends of the outer wall of the bearing inner sleeve, and the outer rings of the two ball bearings are symmetrically inserted on the two ends of the inner wall of the bearing outer sleeve, and there is interference fit between the inner rings of the two ball bearings and the bearing inner sleeve, and between the outer rings and the bearing outer sleeve.

[0008] Furthermore, both ends of the outer wall of the bearing inner sleeve are provided with first limiting shoulders for limiting the axial displacement of the inner ring of the ball bearing, and both ends of the inner wall of the bearing outer sleeve are provided with second limiting shoulders for limiting the axial displacement of the outer ring of the ball bearing.

[0009] Furthermore, bearing pressure plates are installed at both ends of the bearing sleeve by fastening bolts, and a clamping convex ring is provided on one side of each bearing pressure plate. The clamping convex ring is tightly attached to one side of the outer ring of the ball bearing, and the outer wall of the clamping convex ring is fitted with the inner wall of the bearing sleeve.

[0010] Furthermore, a avoidance hole with a diameter larger than the diameters of both ends of the bearing sleeve is provided in the middle of each of the bearing pressure plates.

[0011] Furthermore, the bearing pressure plate is provided with at least two first threaded holes, and the first threaded holes are evenly distributed along the circumference of the bearing pressure plate.

[0012] Furthermore, at least two second threaded holes are formed on the connecting flange, and the second threaded holes are evenly distributed along the circumference of the connecting flange.

[0013] Furthermore, the diameter of the bolt hole corresponding to the connecting flange is larger than the diameter of the screw rod of the connecting bolt and smaller than the diameter of the nut of the connecting bolt.

[0014] Furthermore, an oil filling hole is radially opened on the bearing outer sleeve, and the oil filling hole is communicated with the gap between the bearing outer sleeve and the bearing inner sleeve.

[0015] Furthermore, the connecting flange and the tapered sleeve are an integrated structure.

[0016] Beneficial Effects

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The boring bar support bearing of the utility model is provided with locking sleeves at both ends of the bearing inner sleeve. During installation, the boring bar is passed through the locking sleeve and the bearing inner sleeve, and then the two locking sleeves are pushed between the boring bar and the bearing inner sleeve, and the locking sleeves are fastened with connecting bolts. Since the locking sleeve is provided with a notch and is a tapered structure, the connecting bolt pushes the locking sleeve in during the fastening process, so that the tapered sleeve of the locking sleeve shrinks and deforms and tightly clamps the boring bar, thereby fixing the boring bar. During use, when the inner wall of the bearing inner sleeve or the inner and outer walls of the locking sleeve are worn to produce a gap, the locking sleeve can be moved to the middle of the bearing inner sleeve by continuing to tighten the connecting bolts, and the tapered sleeve continues to shrink and deform and clamps the boring bar, which can effectively eliminate the gap between the support bearing and the boring bar, and ensure that there is no gap between the support bearing and the boring bar, thereby ensuring that the boring hole size and roundness deviation value are within the design range. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the main cross-sectional structure of the locking sleeve in the utility model;

[0021] Figure 3 It is a side view structural schematic diagram of the locking sleeve in the utility model;

[0022] Figure 4 It is a side view structural schematic diagram of the bearing pressure plate in the utility model;

[0023] Figure 5 This is a schematic diagram of the main cross-sectional structure of the bearing jacket in the utility model;

[0024] Figure 6 It is a side view structural diagram of the bearing jacket in the utility model;

[0025] Figure 7 This is a schematic diagram of the main cross-sectional structure of the inner sleeve of the bearing in the utility model;

[0026] Figure 8 It is a schematic diagram of the main cross-sectional structure when the utility model is used.

[0027] Among them: 1. Bearing outer sleeve; 11. Second limit shoulder; 12. Oil filling hole; 2. Bearing inner sleeve; 21. Tapered surface; 22. First limit shoulder; 3. Ball bearing; 4. Locking sleeve; 41. Tapered sleeve; 42. Connecting flange; 43. Notch; 44. Second threaded hole; 45. Bolt hole; 5. Connecting bolt; 6. Fastening bolt; 7. Bearing pressure plate; 71. Pressing convex ring; 72. Avoidance hole; 73. First threaded hole; 8. Boring bar. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0029] See also Figure 1-7 The utility model discloses a boring rod support bearing of a boring machine, comprising a bearing outer sleeve 1, a bearing inner sleeve 2, a ball bearing 3 and a locking sleeve 4, wherein the bearing outer sleeve 1 is sleeved on the periphery of the bearing inner sleeve 2, the bearing outer sleeve 1 and the bearing inner sleeve 2 are coaxially arranged, and the clearance between the bearing outer sleeve 1 and the bearing inner sleeve 2 is matched, which is convenient for the installation of the two on the one hand, and convenient for injecting lubricating oil into the ball bearing 3 for lubrication on the other hand. There are two ball bearings 3, which are symmetrically installed between the bearing outer sleeve 1 and the bearing inner sleeve 2, and the two ends of the bearing inner sleeve 2 are tapered surfaces 21 extending from the outside to the inside and radially inclined. There are two locking sleeves 4, which are symmetrically inserted at the two ends of the bearing inner sleeve 2, and each locking sleeve 4 is It includes a tapered sleeve 41 and a connecting flange 42, wherein the connecting flange 42 is fixed at one end of the tapered sleeve 41, and the outer wall diameter of the tapered sleeve 41 gradually increases along one end of the connecting flange 42. The outer wall surface of the tapered sleeve 41 fits with the tapered surface 21 of the bearing inner sleeve 2 to form a wedge-shaped structure. Each locking sleeve 4 is provided with a notch 43 extending along its axial direction, so that the locking sleeve 4 can shrink and deform after being subjected to force, and can recover after the force is removed. Each locking sleeve 4 is connected to the bearing inner sleeve 2 through a connecting bolt 5. Specifically, the connecting bolt 5 is threadedly connected to the threaded hole provided in the bearing inner sleeve 2 through the bolt hole 45 corresponding to the connecting flange 42, and the locking sleeve 4 is pulled to the middle position of the bearing inner sleeve 2 by the threaded connection force.

[0030] The boring bar support bearing of the utility model is as follows Figure 8 As shown, by arranging locking sleeves 4 at both ends of the bearing inner sleeve 2, during installation, the boring bar 8 is passed through the locking sleeves 4 and the bearing inner sleeve 2, and then the two locking sleeves 4 are pushed between the boring bar 8 and the bearing inner sleeve 2, and the locking sleeves 4 are fastened with connecting bolts 5. Since the locking sleeve 4 is provided with a notch 43 and is a tapered structure, the connecting bolts 5 push the locking sleeve 4 in the fastening process, so that the tapered sleeve 41 of the locking sleeve 4 shrinks and deforms and tightly clamps the boring bar 8, thereby fixing the boring bar 8; during use, when the inner wall of the bearing inner sleeve 2 or the inner and outer walls of the locking sleeve 4 wear and produce a gap, the locking sleeve 4 can be moved to the middle of the bearing inner sleeve 2 by continuing to tighten the connecting bolts 5, and the tapered sleeve 41 continues to shrink and deform and clamps the boring bar 8, which can effectively eliminate the gap between the support bearing and the boring bar, ensuring that there is no gap between the support bearing and the boring bar, thereby ensuring that the boring hole size and roundness deviation value are within the design range. It should be noted that, in actual use, eight sets of support bearings are used to jointly support the boring bar to further ensure the coaxiality and stability of the boring bar. The bearing sleeve 1 corresponding to each set of support bearings can be supported and fixed to the ship bottom plate, stern shaft bracket and other structural parts.

[0031] Preferably, the inner rings of the two ball bearings 3 are symmetrically sleeved at the two ends of the outer wall of the bearing inner sleeve 2, and the outer rings of the two ball bearings 3 are symmetrically inserted at the two ends of the inner wall of the bearing outer sleeve 1, and the inner rings of the two ball bearings 3 and the bearing inner sleeve 2, as well as the outer rings and the bearing outer sleeve 1 are all interference fit. The ball bearing 3 is installed in an interference fit manner, which can ensure the stability of the installation of the ball bearing 3 and prevent it from axially loosening. Furthermore, a first limiting shoulder 22 for limiting the axial displacement of the inner ring of the ball bearing 3 is provided at both ends of the outer wall of the bearing inner sleeve 2, and a second limiting shoulder 11 for limiting the axial displacement of the outer ring of the ball bearing 3 is provided at both ends of the inner wall of the bearing outer sleeve 1, which can play a role in positioning the installation position of the ball bearing 3 when it is installed, and can also further prevent the axial movement of the ball bearing 3 when it is used. Furthermore, bearing pressure plates 7 are installed at both ends of the bearing sleeve 1 through fastening bolts 6. Specifically, the fastening bolts 6 pass through the through holes on the bearing pressure plates 7 and are threadedly connected to the threaded holes provided in the bearing sleeve 1 to fix the bearing pressure plates 7. A clamping convex ring 71 is provided on one side of each bearing pressure plate 7. The clamping convex ring 71 is tightly attached to one side of the outer ring of the ball bearing 3, which plays a role in limiting the ball bearing 3 and preventing it from moving axially to both ends. The outer wall of the clamping convex ring 71 fits the inner wall of the bearing sleeve 1, which plays a role in installing and positioning the bearing pressure plates 7. Furthermore, a avoidance hole 72 with a diameter larger than the diameters of the two ends of the bearing sleeve 1 is provided in the middle of each bearing pressure plate 7 to avoid interference between the bearing pressure plate 7 and the bearing inner sleeve 1, thereby ensuring that the bearing inner sleeve 2 can rotate with the boring bar.

[0032] Preferably, at least two first threaded holes 73 are also provided on the bearing pressure plate 7, and the first threaded holes 73 are evenly distributed along the circumference of the bearing pressure plate 7. During the disassembly process, a top loosening bolt can be threadedly connected in the first threaded hole 73, and the bearing sleeve 1 can be reversed by using the top loosening bolt, so that the bearing pressure plate 7 can be easily removed, and the disassembly and maintenance are more convenient.

[0033] Preferably, at least two second threaded holes 44 are provided on the connection flange 42, and the second threaded holes 44 are evenly distributed along the circumference of the connection flange 42. During the disassembly process, a top loosening bolt can be threadedly connected in the second threaded hole 44, and the top loosening bolt can be used to push the bearing inner sleeve 2, so that the locking sleeve 4 can be easily removed, and the disassembly and maintenance are more convenient.

[0034] Preferably, the diameter of the bolt hole 45 corresponding to the connecting flange 42 is larger than the diameter of the screw of the connecting bolt 5, and smaller than the diameter of the nut of the connecting bolt 5. While satisfying that the connecting bolt 5 can pull the locking sleeve 4 to move axially, the problem of interference between the connecting bolt 5 and the connecting flange 42 when the locking sleeve 4 shrinks and deforms can be avoided.

[0035] Preferably, an oil injection hole 12 is radially opened on the bearing outer sleeve 1, and the oil injection hole 12 is connected to the gap between the bearing outer sleeve 1 and the bearing inner sleeve 2. During use, lubricating oil can be injected into the gap between the bearing outer sleeve 1 and the bearing inner sleeve 2 through the oil injection hole 12, and the lubricating oil is then transferred to the ball bearing 3 through the gap for lubrication, which facilitates the lubrication of the ball bearing 3.

[0036] Preferably, the connecting flange 42 and the tapered sleeve 41 are an integrated structure, which is convenient for manufacturing and can further improve the structural strength of the locking sleeve 4 .

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A boring bar support bearing for a boring machine, characterized in that: The invention comprises a bearing outer sleeve (1), a bearing inner sleeve (2), a ball bearing (3) and a locking sleeve (4), wherein the bearing outer sleeve (1) is sleeved on the outer periphery of the bearing inner sleeve (2), and the bearing outer sleeve (1) and the bearing inner sleeve (2) are clearance-matched, there are two ball bearings (3), and the two ball bearings (3) are symmetrically installed between the bearing outer sleeve (1) and the bearing inner sleeve (2), the two ends of the bearing inner sleeve (2) are tapered surfaces (21) extending from the outside to the inside and radially inclined, there are two locking sleeves (4), and the two locking sleeves (4) are symmetrically inserted into each other. Connected to both ends of the bearing inner sleeve (2), each of the locking sleeves (4) comprises a tapered sleeve (41) and a connecting flange (42), the connecting flange (42) being fixed to one end of the tapered sleeve (41), the outer wall diameter of the tapered sleeve (41) gradually increasing along one end of the connecting flange (42), the outer wall surface of the tapered sleeve (41) being in contact with the tapered surface (21) of the bearing inner sleeve (2), each of the locking sleeves (4) being provided with a notch (43) extending along its axial direction, and each of the locking sleeves (4) being connected to the bearing inner sleeve (2) via a connecting bolt (5).

2. A boring bar support bearing for a boring machine according to claim 1, characterized in that: The inner rings of the two ball bearings (3) are symmetrically sleeved on the two ends of the outer wall of the bearing inner sleeve (2), and the outer rings of the two ball bearings (3) are symmetrically inserted on the two ends of the inner wall of the bearing outer sleeve (1), and the inner rings of the two ball bearings (3) and the bearing inner sleeve (2), as well as the outer rings and the bearing outer sleeve (1) are all interference fits.

3. A boring bar support bearing for a boring machine according to claim 2, characterized in that: The two ends of the outer wall of the bearing inner sleeve (2) are provided with a first limiting shoulder (22) for limiting the axial displacement of the inner ring of the ball bearing (3), and the two ends of the inner wall of the bearing outer sleeve (1) are provided with a second limiting shoulder (11) for limiting the axial displacement of the outer ring of the ball bearing (3).

4. A boring bar support bearing for a boring machine according to claim 3, characterized in that: Both ends of the bearing sleeve (1) are mounted with bearing pressure plates (7) via fastening bolts (6), and one side of each bearing pressure plate (7) is provided with a clamping convex ring (71), the clamping convex ring (71) is tightly attached to one side of the outer ring of the ball bearing (3), and the outer wall of the clamping convex ring (71) is in contact with the inner wall of the bearing sleeve (1).

5. A boring bar support bearing for a boring machine according to claim 4, characterized in that: A avoidance hole (72) having a diameter greater than the diameters of the two ends of the bearing sleeve (1) is provided in the middle of each bearing pressure plate (7).

6. A boring bar support bearing for a boring machine according to claim 4, characterized in that: The bearing pressure plate (7) is also provided with at least two first threaded holes (73), and the first threaded holes (73) are evenly distributed along the circumference of the bearing pressure plate (7).

7. A boring bar support bearing for a boring machine according to claim 1, characterized in that: At least two second threaded holes (44) are also formed on the connecting flange (42), and the second threaded holes (44) are evenly distributed along the circumference of the connecting flange (42).

8. The boring bar support bearing of a boring machine according to claim 1, characterized in that: The diameter of the bolt hole (45) corresponding to the connecting flange (42) is larger than the diameter of the screw rod of the connecting bolt (5) and smaller than the diameter of the nut of the connecting bolt (5).

9. A boring bar support bearing for a boring machine according to any one of claims 1 to 8, characterized in that: The bearing outer sleeve (1) is also radially provided with an oil injection hole (12), and the oil injection hole (12) is communicated with the gap between the bearing outer sleeve (1) and the bearing inner sleeve (2).

10. A boring bar support bearing for a boring machine according to claim 9, characterized in that: The connecting flange (42) and the tapered sleeve (41) are an integrated structure.

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