Machine tool spindle bearing structure

Abstract

The utility model provides a machine tool spindle bearing structure and relates to the technical field of spindle bearing structures. Comprising a bearing seat, a bearing outer ring is installed on the inner wall of the bearing seat, a bearing inner ring is arranged at the top of the bearing outer ring, and a roller is arranged between the bearing inner ring and the bearing outer ring; a shaft body is inserted into the inner wall of the bearing inner ring; a reinforcing and fixing structure is arranged between the shaft body and the inner ring of the bearing, by arranging the reinforcing and fixing structure, under the action of the reinforcing rod, the strength of the shaft body is enhanced, pressure applied by the bearing firstly acts on the reinforcing rod and then is dispersed to the shaft body, the overall bearing capacity of the shaft body is increased, and the service life of the shaft body is prolonged. Meanwhile, when the shaft body is fixed to the bearing through the reinforcing rods on the shaft body, the size of the shaft body is not slightly larger than that of an inner ring of the bearing, auxiliary limiting and fixing can be conducted under the action of the reinforcing rods, fixing is stable, hammering installation is not needed, and the situation that the service life is affected due to deformation in the installation process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of spindle bearing structures, in particular to a spindle bearing structure for a machine tool. Background Art

[0002] The spindle bearing structure of a machine tool is mainly used for the transmission of the entire machine tool. It is mainly composed of a bearing seat, bearings and a spindle rod. When in use, it is connected to an external device for driving. As one of the important components of a machine tool, the spindle bearing structure plays an important role in machine tool production.

[0003] In actual work, the spindle bearing structure of the existing technology can basically meet the normal operation of the equipment, and the overall structural functionality is perfect and can fully meet the production needs of the market, but there are still the following two problems:

[0004] 1. In actual use, the bearing and the spindle are hammered to make the spindle embedded in the inner ring of the bearing. This method makes the downward pressure of the bearing directly act on the outside of the spindle. Within the specified force range, the bearing can be used safely. However, once an operating error occurs, resulting in increased force, the pressure directly acting on the spindle will cause the shaft to break, causing production risks;

[0005] 2. The dimensions of the bearing and the spindle match. The outer diameter of the spindle is generally slightly larger than the inner ring of the bearing. The two are fixed by hammering, so that they can be firmly fixed. However, this method is very easy to cause slight deformation of the bearing or spindle during disassembly and assembly, thus affecting its service life.

[0006] Therefore, the utility model provides a machine tool spindle bearing structure. Utility Model Content

[0007] The purpose of the utility model is to solve the shortcomings in the prior art and provide a machine tool spindle bearing structure.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a machine tool spindle bearing structure, including a bearing seat,

[0009] The inner wall of the bearing seat is provided with a bearing outer ring, the top of the bearing outer ring is provided with a bearing inner ring, and a roller is provided between the bearing inner ring and the bearing outer ring;

[0010] A shaft body is inserted into the inner wall of the inner ring of the bearing;

[0011] A reinforcing fixing structure is provided between the shaft body and the inner ring of the bearing;

[0012] A lubrication structure is provided on the top of the bearing seat;

[0013] The reinforcing fixing structure includes a first semicircular groove, a second semicircular groove and an end cover, the first semicircular groove is opened inside the inner ring of the bearing, the second semicircular groove is opened on the outer surface of the shaft body, and a reinforcing rod is inserted between the first semicircular groove and the second semicircular groove.

[0014] As a preferred embodiment, a circular clamping frame is fixedly connected to one side of the outer surface of the end cover, a circular clamping block is fixedly connected to one side of the shaft body, the circular clamping block can be clamped into the inner wall of the circular clamping frame, the inner walls of the end cover and the circular clamping frame are threadedly inserted with a threaded clamping rod, a threaded clamping hole is provided on one side of the circular clamping block, the threaded clamping rod is threadedly clamped with the inner wall of the threaded clamping hole, a plurality of rectangular plates are fixedly connected to one side of the outer surface of the end cover, a connecting rod is fixedly connected to one end of the connecting rod with a clamping cap, and the reinforcing rod can be inserted into the inner wall of the clamping cap.

[0015] The technical effect of adopting the above further scheme is: the circular clamp frame on the end cover and the circular clamp block on the shaft body are fixed, so that the end cover can be auxiliary fixed to the bearing, the reinforcing rod and the shaft body, so that the reinforcing rod can strengthen the strength of the shaft body and change its force point while changing the connection method between the shaft body and the bearing, so that the reinforcing rod cooperates with the first semicircular groove and the second semicircular groove, so that the bearing and the shaft body are firmly connected.

[0016] As a preferred embodiment, the lubrication structure includes a lubricating oil cylinder, one side of the lubricating oil cylinder is fixedly connected to a support rod, one end of the support rod is fixedly connected to the top of the bearing seat, a circular groove is provided at the bottom of the inner wall of the lubricating oil cylinder, and an oil leakage hole is provided at the bottom of the circular groove.

[0017] The technical effect of adopting the above further scheme is: the lubricating oil cylinder can pass through the oil leakage hole at the bottom, so that the lubricating oil can drip from the oil leakage hole to the connection between the bottom shaft and the bearing, so that the connection can be lubricated, avoiding aggravated appearance wear caused by long-term use, thereby increasing the service life of the shaft and the bearing.

[0018] As a preferred embodiment, a sliding rod is slidably provided on the bottom inner wall of the lubricating oil cylinder located inside the circular groove, a circular blocking block is fixedly connected to the top of the sliding rod, and the circular blocking block can be stuck into the inner wall of the circular groove, the bottom end of the sliding rod is fixedly connected to a guide plate, a guide groove is provided on the top of the guide plate, and the outer surface of the sliding rod is sleeved with a return spring whose two ends are respectively fixedly connected to the bottom of the lubricating oil cylinder and the top of the guide plate.

[0019] The technical effect of adopting the above further scheme is: under the action of the sliding rod, the circular sealing block can be driven to move up and down, thereby driving the oil leakage hole to be sealed or opened, and then under the action of the guide plate and the guide groove, the lubricating oil can flow to the connection between the bearing and the shaft.

[0020] Compared with the prior art, the advantages and positive effects of the utility model are:

[0021] By setting up a reinforced fixing structure, the strength of the shaft is enhanced under the action of the reinforcing rod, and the pressure exerted by the bearing first acts on the reinforcing rod and then dispersed to the shaft, thereby increasing the overall bearing capacity of the shaft. At the same time, the reinforcing rod on the shaft makes it unnecessary for the shaft to be slightly larger than the inner ring of the bearing when fixing it to the bearing. Auxiliary limit fixing can be performed under the action of the reinforcing rod, so that the fixation is firm and there is no need for hammering installation, thus avoiding deformation during installation and affecting the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural schematic diagram of a machine tool spindle bearing structure provided by the utility model;

[0023] Figure 2 A schematic diagram of the structure of a bearing seat of a machine tool spindle bearing structure provided by the utility model;

[0024] Figure 3 A schematic diagram of the structure of a lubricating oil cylinder of a machine tool spindle bearing structure provided by the utility model;

[0025] Figure 4 The utility model provides a schematic structural diagram of the shaft body of a machine tool spindle bearing structure.

[0026] Legend:

[0027] 1. Bearing seat; 2. Bearing outer ring; 3. Bearing inner ring; 4. Roller;

[0028] 5. Strengthening fixing structure; 51. First semicircular groove; 52. Second semicircular groove; 53. Strengthening rod; 54. End cover; 55. Round clamp frame; 56. Round clamp block; 57. Threaded clamp hole; 58. Threaded clamp rod; 59. Rectangular plate; 510. Connecting rod; 511. Clamp cap;

[0029] 6. Lubrication structure; 61. Lubricating oil cylinder; 62. Connecting rod; 63. Circular groove; 64. Oil leakage hole; 65. Sliding rod; 66. Circular blocking block; 67. Reset spring; 68. Guide plate; 69. Guide groove;

[0030] 7. Axis. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] like Figure 1-Figure 4 As shown, this embodiment provides a technical solution: a machine tool spindle bearing structure, including a bearing seat 1,

[0033] The inner wall of the bearing seat 1 is provided with a bearing outer ring 2, the top of the bearing outer ring 2 is provided with a bearing inner ring 3, and a roller 4 is provided between the bearing inner ring 3 and the bearing outer ring 2;

[0034] A shaft body 7 is inserted into the inner wall of the bearing inner ring 3;

[0035] A reinforcing fixing structure 5 is provided between the shaft body 7 and the bearing inner ring 3;

[0036] A lubrication structure 6 is provided on the top of the bearing seat 1;

[0037] The reinforcing fixing structure 5 includes a first semicircular groove 51, a second semicircular groove 52 and an end cover 54. The first semicircular groove 51 is opened inside the bearing inner ring 3, and the second semicircular groove 52 is opened on the outer surface of the shaft body 7. A reinforcing rod 53 is inserted between the first semicircular groove 51 and the second semicircular groove 52.

[0038] Further, such as Figure 2 and Figure 4 As shown: a circular clamp frame 55 is fixedly connected to one side of the outer surface of the end cover 54, a circular clamp block 56 is fixedly connected to one side of the shaft body 7, and the circular clamp block 56 can be clamped into the inner wall of the circular clamp frame 55. The inner walls of the end cover 54 and the circular clamp frame 55 are threadedly inserted with a threaded clamp rod 58, and a threaded clamp hole 57 is opened on one side of the circular clamp block 56. The threaded clamp rod 58 is threadedly clamped with the inner wall of the threaded clamp hole 57. A plurality of rectangular plates 59 are fixedly connected to one side of the outer surface of the end cover 54, and a connecting rod 510 is fixedly connected to one side of the plurality of rectangular plates 59. The connecting rod 510 is One end is fixedly connected with a clamping cap 511, and the reinforcing rod 53 can be inserted into the inner wall of the clamping cap 511, and fixed by the circular clamping frame 55 on the end cover 54 and the circular clamping block 56 on the shaft body 7, so that the end cover 54 can be auxiliaryly fixed with the bearing, the reinforcing rod 53 and the shaft body 7, so that the reinforcing rod 53 can strengthen the strength of the shaft body 7, change its force point, and change the connection method between the shaft body 7 and the bearing, so that the reinforcing rod 53 cooperates with the first semicircular groove 51 and the second semicircular groove 52, so that the bearing and the shaft body 7 are firmly connected.

[0039] The above scheme still has the problem that the connection between the bearing and the shaft body 7 is aggravated by long-term use, which affects the service life. Figure 3 As shown: In the present embodiment, the lubrication structure 6 includes a lubricating oil cylinder 61, one side of which is fixedly connected to a support 62, one end of the support rod 62 is fixedly connected to the top of the bearing seat 1, a circular groove 63 is provided at the bottom of the inner wall of the lubricating oil cylinder 61, and an oil leakage hole 64 is provided at the bottom of the circular groove 63. The lubricating oil cylinder 61 can pass through the oil leakage hole 64 at the bottom, so that the lubricating oil can drip from the oil leakage hole 64 to the connection between the shaft body 7 and the bearing at the bottom, thereby lubricating the connection, avoiding aggravated appearance wear caused by long-term use, thereby increasing the service life of the shaft body 7 and the bearing.

[0040] The above solution still has the problem that the lubricating oil keeps flowing out from the oil leakage hole 64 after being opened and cannot accurately flow to the connection between the bearing and the shaft body 7. Figure 3 As shown, in this scheme, the bottom inner wall of the lubricating oil cylinder 61 is located inside the circular groove 63 and is slidably provided with a sliding rod 65, and the top of the sliding rod 65 is fixedly connected to a circular blocking block 66, and the circular blocking block 66 can be stuck into the inner wall of the circular groove 63, and the bottom end of the sliding rod 65 is fixedly connected to a guide plate 68, and the top of the guide plate 68 is provided with a guide groove 69. The outer surface of the sliding rod 65 is sleeved with a return spring 67 whose two ends are respectively fixedly connected to the bottom of the lubricating oil cylinder 61 and the top of the guide plate 68. Under the action of the sliding rod 65, the circular blocking block 66 can be driven to move up and down, and then the oil leakage hole 64 can be driven to be blocked or opened, and then under the action of the guide plate 68 and the guide groove 69, the lubricating oil can flow to the connection between the bearing and the shaft body 7.

[0041] Working principle:

[0042] like Figure 1-4 As shown:

[0043] When in use: insert the shaft body 7 into the bearing inner ring 3, and then insert the reinforcing rod 53 from between the first semicircular groove 51 and the second semicircular groove 52 in sequence, so that the reinforcing rod 53 can be attached to the bearing inner ring 3 and the reinforcing rod 53;

[0044] At this time, the round clamping block 56 is clamped into the round clamping frame 55, and the clamping cap 511 can be clamped with one end of the reinforcing rod 53. At this time, the threaded clamping rod 58 is rotated so that the threaded clamping rod 58 can be fixed with the threaded clamping hole 57, thereby fixing the reinforcing rod 53, the shaft body 7 and the bearing inner ring 3;

[0045] When the shaft body 7 rotates, the reinforcing rod 53 drives the bottom of the guide plate 68 to move upward, and then drives the sliding rod 65 to slide on the inner wall of the lubricating oil cylinder 61, at which time the return spring 67 is deformed, and the circular blocking block 66 is separated from the circular groove 63, and the lubricating oil flows from the oil leakage hole 64 to the sliding rod 65, and then to the guide plate 68 and the guide groove 69, and then to the connection between the shaft body 7 and the inner ring 3 of the bearing;

[0046] When the reinforcing rod 53 is separated from the guide plate 68, the sliding rod 65 can be reset under the action of the reset spring 67, thereby driving the circular blocking block 66 to reset, thereby blocking the circular groove 63, and so on.

[0047] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A machine tool spindle bearing structure, comprising a bearing seat (1), characterized in that: A bearing outer ring (2) is installed on the inner wall of the bearing seat (1), a bearing inner ring (3) is arranged on the top of the bearing outer ring (2), and a roller (4) is arranged between the bearing inner ring (3) and the bearing outer ring (2); A shaft body (7) is inserted into the inner wall of the bearing inner ring (3); A reinforcing fixing structure (5) is provided between the shaft body (7) and the bearing inner ring (3); A lubrication structure (6) is provided on the top of the bearing seat (1); The reinforcing fixing structure (5) comprises a first semicircular groove (51), a second semicircular groove (52) and an end cover (54); the first semicircular groove (51) is arranged inside the inner ring of the bearing (3); the second semicircular groove (52) is arranged on the outer surface of the shaft body (7); and a reinforcing rod (53) is inserted between the first semicircular groove (51) and the second semicircular groove (52).

2. The machine tool spindle bearing structure according to claim 1, characterized in that: A circular clamping frame (55) is fixedly connected to one side of the outer surface of the end cover (54), and a circular clamping block (56) is fixedly connected to one side of the shaft body (7), and the circular clamping block (56) can be clamped into the inner wall of the circular clamping frame (55).

3. The machine tool spindle bearing structure according to claim 2, characterized in that: The inner walls of the end cover (54) and the circular clamping frame (55) are threadedly inserted with a threaded clamping rod (58), one side of the circular clamping block (56) is provided with a threaded clamping hole (57), and the threaded clamping rod (58) is threadedly clamped with the inner wall of the threaded clamping hole (57).

4. The machine tool spindle bearing structure according to claim 1, characterized in that: A plurality of rectangular plates (59) are fixedly connected to one side of the outer surface of the end cover (54), and a connecting rod (510) is fixedly connected to one side of the plurality of rectangular plates (59).

5. The machine tool spindle bearing structure according to claim 4, characterized in that: One end of the connecting rod (510) is fixedly connected to a clamping cap (511), and the reinforcing rod (53) can be inserted into the inner wall of the clamping cap (511).

6. The machine tool spindle bearing structure according to claim 1, characterized in that: The lubrication structure (6) comprises a lubricating oil cylinder (61), one side of the lubricating oil cylinder (61) is fixedly connected to a support rod (62), one end of the support rod (62) is fixedly connected to the top of the bearing seat (1), a circular groove (63) is provided at the bottom of the inner wall of the lubricating oil cylinder (61), and an oil leakage hole (64) is provided at the bottom of the circular groove (63).

7. The machine tool spindle bearing structure according to claim 6, characterized in that: A sliding rod (65) is slidably provided on the bottom inner wall of the lubricating oil cylinder (61) located inside the circular groove (63), and a circular blocking block (66) is fixedly connected to the top end of the sliding rod (65). The circular blocking block (66) can be stuck into the inner wall of the circular groove (63).

8. The machine tool spindle bearing structure according to claim 7, characterized in that: The bottom end of the sliding rod (65) is fixedly connected to a guide plate (68), the top of the guide plate (68) is provided with a guide groove (69), and the outer surface of the sliding rod (65) is sleeved with a return spring (67) whose two ends are respectively fixedly connected to the bottom of the lubricating oil cylinder (61) and the top of the guide plate (68).

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