Guide rail roller bearing for machine tool

Abstract

The utility model relates to a guide rail roller bearing for a machine tool, and belongs to the technical field of bearings, the guide rail roller bearing comprises a bearing body and a threaded connection column, the bearing body comprises an inner ring and an outer ring, the inner ring is sleeved with the outer ring, and the threaded connection column is sleeved with the inner ring; the inner circumferential wall of the inner ring is provided with an internal thread in threaded connection with the threaded connection column, and the side, away from the inner ring, of the threaded connection column can be installed on a machine tool in a threaded mode. The roller bearing has the effect of improving the stability after the roller bearing is mounted on a machine tool.

Description

Technical Field

[0001] The present application relates to the technical field of bearings, and in particular to a guide rail roller bearing for machine tools. Background Art

[0002] Guide rail roller bearings are usually used in the sliding mechanism of some machine tools. Guide rail roller bearings can be matched with the guide rail surface according to practical occasions. Guide rail roller bearings can roll directly on the guide rail and can withstand heavier loads and impact loads.

[0003] In the related art, when the guide rail roller bearing is installed in the sliding mechanism of the machine tool, the roller bearing is sleeved on the optical axis in the sliding mechanism and the roller bearing and the optical axis are interference fit. However, as the machine tool is used for a longer time, a certain amount of wear will occur between the roller bearing and the optical axis, affecting the stability of the interference fit between the two, thereby making the stability of the roller bearing after being installed on the sliding mechanism poor. Utility Model Content

[0004] In order to improve the stability of a roller bearing after being installed on a machine tool, the present application provides a guide rail roller bearing for a machine tool.

[0005] The present application provides a guide rail roller bearing for a machine tool, which adopts the following technical solution:

[0006] A guide rail roller bearing for a machine tool comprises a bearing body and a threaded connection column, wherein the bearing body comprises an inner ring and an outer ring, wherein the outer ring is sleeved on the inner ring, and the inner ring is sleeved on the threaded connection column, and an internal thread threadedly connected to the threaded connection column is provided on the inner circumferential wall of the inner ring, and the threaded connection column can be threadedly mounted on the machine tool on a side away from the inner ring.

[0007] Preferably, the guide rail roller bearing for machine tools further comprises a locking structure which prevents the threaded connection column and the inner ring from loosening after being connected, wherein the locking structure is partially located on the threaded connection column and partially located on the inner ring.

[0008] Preferably, the locking structure includes bevel teeth and an anti-loosening ring piece, the bevel teeth are arranged on one end of the inner ring close to the threaded connecting column, the anti-loosening ring piece is sleeved and fixed on the threaded connecting column, and a locking bevel groove for inserting the bevel teeth is provided on one side of the anti-loosening ring piece close to the bevel teeth.

[0009] Preferably, when the bevel teeth are inserted into the locking bevel groove, the anti-loosening ring piece abuts against the inner ring.

[0010] Preferably, the bearing body further includes a dust cover located between the inner ring and the outer ring.

[0011] Preferably, a grease injection hole is provided on the dust cover.

[0012] Preferably, a rubber plug is inserted into the grease injection hole in an interference fit manner.

[0013] Preferably, a snap ring groove for the grease injection hole to be snapped into is provided on the outer peripheral wall of the rubber plug.

[0014] Preferably, a circle of grooves capable of cooperating with the guide rails on the machine tool is provided on the outer peripheral wall of the outer ring.

[0015] Preferably, a key groove is provided on the inner wall of the inner ring, and the key groove penetrates the inner ring along the axial direction of the inner ring.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. The bearing body is threadedly connected to the threaded connection column, and the threaded connection column is threadedly installed on the machine tool. At the same time, the setting of the locking structure makes it difficult for the bearing body to reversely rotate and become loose after being connected to the threaded connection column, thereby improving the stability of the bearing body after being installed on the machine tool;

[0018] 2. The tooling personnel can add lubricating oil or grease into the bearing body through the grease injection hole. When the grease or lubricating oil is not injected into the bearing body, the rubber plug can cover the grease injection hole to prevent the grease from leaking out and prevent the external dust from entering the bearing body through the grease injection hole.

[0019] 3. The keyway is provided so that the bearing body can be stably connected to the optical axis of the machine tool through key connection, and an additional connection method is provided for the user to choose. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the roller bearing in the embodiment of the present application.

[0021] Figure 2 It is an exploded schematic diagram of the roller bearing in the embodiment of the present application.

[0022] Figure 3 It is a schematic diagram of the structure of the rubber stopper in the embodiment of the present application.

[0023] Figure 4 yes Figure 1 Enlarged view of part A in the middle.

[0024] Explanation of the reference numerals: 1. bearing body; 11. inner ring; 111. keyway; 12. outer ring; 121. groove; 13. dust cover; 131. grease injection hole; 132. rubber plug; 133. snap ring groove; 14. ball; 2. threaded connecting column; 3. locking structure; 31. bevel teeth; 32. anti-loosening ring plate; 321. locking bevel groove. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-4 This application is described in further detail.

[0026] The present application embodiment discloses a guide rail roller bearing for a machine tool. Figure 1 The guide rail roller bearing for machine tools comprises a bearing body 1, a threaded connection column 2 and a locking structure 3. The bearing body 1 is threadedly connected to the threaded connection column 2, and the threaded connection column 2 can be threadedly installed on the machine tool, so that the bearing body 1 is threadedly installed on the machine tool. After the bearing body 1 is connected to the threaded connection column 2, it is not easy to rotate in the opposite direction and become loose under the action of the locking structure 3, thereby improving the stability of the bearing body 1 after installation.

[0027] Reference Figure 2 The bearing body 1 includes an inner ring 11, an outer ring 12, a dust cover 13 and a ball 14. The outer ring 12 is sleeved on the inner ring 11 and the central axis of the outer ring 12 coincides with the central axis of the inner ring 11. The ball 14 is located between the outer ring 12 and the inner ring 11, and the inner ring 11 and the outer ring 12 can achieve relative rotation through the ball 14. Two dust covers 13 are symmetrically arranged along the axial direction of the inner ring 11, and the ball 14 is located between the two dust covers 13. The two dust covers 13 respectively block the gap between the inner ring 11 and the outer ring 12, so that external dust is not easy to enter between the inner ring 11 and the outer ring 12 to affect the rolling of the ball 14.

[0028] An internal thread is provided on the inner circumferential wall of the inner ring 11, and one end of the threaded connection column 2 is inserted into the inner ring 11 and threadedly connected with the inner ring 11, thereby connecting the entire bearing body 1 with the threaded connection column 2. A keyway 111 is provided on the inner wall of the inner ring 11, and the keyway 111 penetrates the inner ring 11 along the axial direction of the inner ring 11. When the inner ring 11 is matched with the optical axis, the keyway 111 can be used to connect the inner ring 11 with the optical axis. Compared with the interference fit between the inner ring 11 and the optical axis, the key connection between the inner ring 11 and the optical axis is more stable.

[0029] Reference Figure 2 The outer peripheral wall of the outer ring 12 is provided with a circle of grooves 121, and the guide rails on the machine tool can be located in the grooves 121, so that the outer ring 12 is not easy to separate from the guide rails when rolling on the guide rails, thereby making the bearing body 1 more stable when rolling on the guide rails.

[0030] Reference Figure 2 and Figure 3 Since two dust covers 13 are symmetrically arranged, the following description will be made by taking the matching structure of one dust cover 13, the inner ring 11 and the outer ring 12 as an example. The dust cover 13 is a circular ring sheet, and the outer peripheral wall of the inner ring 11 is provided with an outer ring groove for inserting the inner peripheral wall of the dust cover 13; the inner peripheral wall of the outer ring 12 is provided with an inner ring groove for inserting the outer peripheral wall of the dust cover 13, so that the dust cover 13 can cover the gap between the inner ring 11 and the outer ring 12.

[0031] A grease injection hole 131 is provided on the side of the dust cover 13 facing away from the ball 14, and the grease injection hole 131 passes through the dust cover 13. A rubber plug 132 is inserted into the grease injection hole 131, and the outer diameter of the rubber plug 132 is larger than the aperture of the grease injection hole 131, so that the rubber plug 132 can be inserted into the grease injection hole 131 with interference fit. Furthermore, a circle of snap ring grooves 133 are provided on the outer peripheral wall of the rubber plug 132, and the inner peripheral wall of the grease injection hole 131 will be inserted into the snap ring groove 133, thereby improving the stability of the rubber plug 132 after installation. It is worth noting that after the inner peripheral wall of the grease injection hole 131 is inserted into the snap ring groove 133, it still has an interference fit with the rubber plug 132, thereby preventing the internal grease from leaking out, and at the same time preventing external dust from entering the bearing body 1 through the grease injection hole 131.

[0032] Reference Figure 2 and Figure 3 The end of the rubber plug 132 away from the ball 14 protrudes from the grease injection hole 131 and is exposed to the outside. The part of the rubber plug 132 exposed to the outside is provided with friction lines, so that the user can easily pull out the rubber plug 132 when grease or lubricating oil needs to be injected into the bearing.

[0033] Reference Figure 1 and Figure 4 , the locking structure 3 is partially located on the threaded connection column 2 and partially located on the inner ring 11. The locking structure 3 includes a bevel tooth 31 and an anti-loosening ring piece 32. The bevel tooth 31 is located at the end of the inner ring 11 close to the insertion of the threaded connection column 2, and the bevel tooth 31 is welded to the inner ring 11. The anti-loosening ring piece 32 is sleeved and fixed on the threaded connection column 2, and a locking bevel groove 321 for the bevel tooth 31 to be inserted is provided on the side of the anti-loosening ring piece 32 close to the bevel tooth 31. When the bevel tooth 31 is inserted into the locking bevel groove 321, the anti-loosening ring piece 32 abuts against the inner ring 11, and the bevel tooth 31 will limit the reverse rotation of the threaded connection column 2, and lock the reverse rotation of the threaded connection column 2, so that the threaded connection column 2 is not easy to rotate in the reverse direction and the inner ring 11 is loose.

[0034] The implementation principle of a guide rail roller bearing for machine tools in the embodiment of the present application is as follows: the bearing body 1 is threadedly connected with the threaded connection column 2, and the threaded connection column 2 is threadedly installed on the machine tool. At the same time, when the beveled teeth 31 are inserted into the locking bevel groove 321, the anti-loosening ring sheet 32 ​​abuts against the inner ring 11. At this time, the beveled teeth 31 will limit the reverse rotation of the threaded connection column 2 and lock the reverse rotation of the threaded connection column 2, so that the threaded connection column 2 is not easy to reversely rotate and loosen with the inner ring 11, which improves the stability of the threaded connection column 2 and the bearing body 1 after the connection. The threaded connection column 2 is threadedly connected to the machine tool, so the stability of the bearing body 1 after being installed on the machine tool is improved. In addition, the opening of the keyway 111 enables the bearing body 1 to achieve a stable connection through a key connection when connected to the optical axis of the machine tool, and an additional connection method is provided for the user to choose.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A guide rail roller bearing for a machine tool, characterized in that: The invention comprises a bearing body (1) and a threaded connection column (2), wherein the bearing body (1) comprises an inner ring (11) and an outer ring (12), wherein the outer ring (12) is sleeved on the inner ring (11), and the inner ring (11) is sleeved on the threaded connection column (2), and an inner circumferential wall of the inner ring (11) is provided with an internal thread threadedly connected to the threaded connection column (2), and the side of the threaded connection column (2) away from the inner ring (11) can be threadedly mounted on a machine tool.

2. The guide rail roller bearing for machine tools according to claim 1, characterized in that: It also includes a locking structure (3) that prevents the threaded connection column (2) and the inner ring (11) from loosening after being connected. The locking structure (3) is partially located on the threaded connection column (2) and partially located on the inner ring (11).

3. The guide rail roller bearing for machine tools according to claim 2, characterized in that: The locking structure (3) comprises a bevel tooth (31) and an anti-loosening ring piece (32); the bevel tooth (31) is arranged at one end of the inner ring (11) close to the threaded connection column (2); the anti-loosening ring piece (32) is sleeved and fixed on the threaded connection column (2); and a locking bevel groove (321) for inserting the bevel tooth (31) is provided on one side of the anti-loosening ring piece (32) close to the bevel tooth (31).

4. The guide rail roller bearing for machine tools according to claim 3, characterized in that: When the bevel teeth (31) are inserted into the locking bevel groove (321), the anti-loosening ring piece (32) abuts against the inner ring (11).

5. The guide rail roller bearing for machine tools according to claim 1, characterized in that: The bearing body (1) further comprises a dust cover (13) located between the inner ring (11) and the outer ring (12).

6. The guide rail roller bearing for machine tools according to claim 5, characterized in that: The dust cover (13) is provided with a grease injection hole (131).

7. The guide rail roller bearing for machine tools according to claim 6, characterized in that: A rubber plug (132) is inserted into the grease injection hole (131) in an interference fit.

8. The guide rail roller bearing for machine tools according to claim 7, characterized in that: The outer peripheral wall of the rubber plug (132) is provided with a snap ring groove (133) for the grease injection hole (131) to be snapped into.

9. The guide rail roller bearing for machine tools according to claim 1, characterized in that: The outer peripheral wall of the outer ring (12) is provided with a circle of grooves (121) capable of cooperating with the guide rail on the machine tool.

10. The guide rail roller bearing for machine tools according to claim 1, characterized in that: A key groove (111) is provided on the inner wall of the inner ring (11), and the key groove (111) penetrates the inner ring (11) along the axial direction of the inner ring (11).

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