Oil inlet prevention structure for bearing end of screw rod of machine tool

Abstract

A machine tool lead screw bearing end oil inlet prevention structure relates to the technical field of machine tool equipment and comprises a lead screw, the outer side of the lead screw is sleeved with an oblique angle ball bearing and spacer rings, and the spacer rings are located on the two sides of the oblique angle ball bearing and fixed through locking nuts so that the spacer rings can abut against the inner ring of the oblique angle ball bearing; the bevel ball bearing is arranged in the bearing seat and is tightly pressed through the bearing end cover; two tooth-shaped grooves are formed in the outer ring of the spacer ring, the section of each tooth-shaped groove is in a right trapezoid shape, and the right-angle side of each tooth-shaped groove is close to the bevel ball bearing. Oil guide grooves are formed in the bearing end cover and the bearing seat, the positions of the oil guide grooves correspond to those of the tooth-shaped grooves, and oil discharge ports are formed below the oil guide grooves; impurity liquid is separated from the spacer ring by utilizing centrifugal force generated by high-speed rotation, the tooth-shaped grooves in the spacer ring have a guiding effect on the impurity liquid, so that the impurity liquid cannot permeate into the bearing, the oil guide grooves are beneficial to guiding and discharging the impurity liquid, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of machine tool equipment technology, specifically to a structure for preventing oil ingress into the bearing end of a machine tool lead screw. Background Technology

[0002] During equipment operation, the sealing ring on the lead screw can block solid particles and some grease. However, as the working time increases or the sealing ring is damaged, impurities and oil will seep into the bearing through the gaps in the spacer ring, contaminating the bearing lubrication, causing the bearing to overheat and generate high temperatures, resulting in bearing damage. Utility Model Content

[0003] To address the shortcomings of the existing technology, the purpose of this utility model is to provide an oil-proof structure for the bearing end of a machine tool lead screw, which can solve the problem that when the sealing ring on the lead screw is damaged, impurities and oil will seep into the bearing through the gaps in the spacer ring, contaminating the bearing lubrication, causing the bearing to overheat and generate high temperatures, and ultimately damaging the bearing.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An oil ingress prevention structure for a machine tool lead screw bearing includes a lead screw, an angular contact ball bearing and a spacer ring fitted on the outer side of the lead screw, the spacer ring being located on both sides of the angular contact ball bearing and fixed by a lock nut, such that the spacer ring abuts against the inner ring of the angular contact ball bearing; the angular contact ball bearing is disposed in a bearing housing and pressed by a bearing end cap; two toothed grooves are formed on the outer ring of the spacer ring, the cross-section of the toothed grooves being a right-angled trapezoid, with its right-angled side close to the angular contact ball bearing; both the bearing end cap and the bearing housing are provided with oil guide grooves, the positions of the oil guide grooves corresponding to the toothed grooves, and an oil drain port is provided below the oil guide grooves.

[0006] Preferably, the two spacer rings are respectively provided with sealing rings between the bearing housing and the bearing end cover.

[0007] Preferably, the tooth groove has an opening width of 4mm, a bottom width of 2mm, and a depth of 2mm.

[0008] Preferably, the oil guide groove has a width of 14 mm and a depth of 3.5 mm.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model utilizes the centrifugal force generated by high-speed rotation to cause impurity liquid to detach from the spacer ring. The toothed groove on the spacer ring guides the impurity liquid, preventing it from seeping into the bearing. Oil guide grooves are provided on the bearing housing and bearing end cover to facilitate the flow and discharge of impurity liquid, thereby extending the service life of the bearing. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0012] Explanation of reference numerals in the attached figures:

[0013] 1-Screw, 2-Angle ball bearing, 3-Spacer ring, 4-Locking nut, 5-Bearing housing, 6-Bearing end cap, 7-Thread groove, 8-Oil guide groove, 9-Oil drain port, 10-Sealing ring. Detailed Implementation

[0014] The invention will now be described in detail with reference to the accompanying drawings, by way of example. Obviously, the described embodiments are only some embodiments of the invention, and not all embodiments. Example

[0015] like Figure 1 As shown, this utility model discloses an oil-proof structure for a machine tool lead screw bearing end, including a lead screw 1. An angular contact ball bearing 2 and a spacer ring 3 are sleeved on the outer side of the lead screw 1. The spacer ring 3 is located on both sides of the angular contact ball bearing 2 and is fixed by a locking nut 4, so that the spacer ring 3 abuts against the inner ring of the angular contact ball bearing 2. The angular contact ball bearing 2 is disposed in a bearing housing 5 and is pressed by a bearing end cap 6. Two toothed grooves 7 are formed on the outer ring of the spacer ring 3. The cross-section of the toothed groove 7 is a right-angled trapezoid, with its right-angled side close to the angular contact ball bearing 2. The opening width of the toothed groove 7 is 4mm, the bottom width is 2mm, and the depth is 2mm. The distance between the two toothed grooves 7 is 2mm. Both the bearing end cap 6 and the bearing housing 5 are provided with oil guide grooves 8, which correspond to the toothed grooves 7. The oil guide grooves 8 are 14mm wide and 3.5mm deep, and an oil drain port 9 is provided below the oil guide grooves 8.

[0016] Furthermore, in this embodiment, sealing rings 10 are provided between the two spacer rings 3 and the bearing seat 5 and the bearing end cover 6, respectively.

[0017] Working principle: During operation, the impurity liquid flows along the screw 1 into the tooth groove 7 of the spacer ring 3. The impurity liquid is thrown into the oil guide groove 8 along the inclined side of the tooth groove 7 by the centrifugal force generated by the high-speed rotation. An oil drain port 9 is provided below the oil guide groove 8, and the oil impurities are discharged from the oil drain port 9.

[0018] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and application concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A machine tool lead screw bearing end anti-oil ingress structure, comprising a lead screw (1), wherein an angular contact ball bearing (2) and a spacer ring (3) are sleeved on the outer side of the lead screw (1), the spacer ring (3) is located on both sides of the angular contact ball bearing (2) and is fixed by a lock nut (4), such that the spacer ring (3) abuts against the inner ring of the angular contact ball bearing (2); the angular contact ball bearing (2) is disposed in a bearing housing (5) and is pressed by a bearing end cover (6); characterized in that: Two toothed grooves (7) are provided on the outer ring of the spacer ring (3). The cross section of the toothed groove (7) is a right trapezoid, and its right angle side is close to the angled ball bearing (2). Both the bearing end cover (6) and the bearing seat (5) are provided with oil guide grooves (8). The positions of the oil guide grooves (8) and the toothed grooves (7) are corresponding. An oil drain port (9) is provided below the oil guide grooves (8).

2. The anti-oil-entry structure for the bearing end of a machine tool lead screw as described in claim 1, characterized in that: The two spacer rings (3) are respectively provided with sealing rings (10) between the bearing housing (5) and the bearing end cover (6).

3. The anti-oil-entry structure for the bearing end of a machine tool lead screw as described in claim 1, characterized in that: The tooth groove (7) has an opening width of 4mm, a bottom width of 2mm, and a depth of 2mm.

4. The anti-oil-entry structure for the bearing end of a machine tool lead screw as described in claim 1, characterized in that: The oil guide groove (8) has a width of 14 mm and a depth of 3.5 mm.

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