Insulating main shaft

Abstract

The utility model relates to an insulating main shaft which comprises a shaft center, a shaft sleeve and a bearing, the bearing is arranged on the shaft center, the shaft sleeve is arranged on the outer side of the bearing, a first contact part is arranged between the shaft center and the bearing, a second contact part is arranged between the shaft sleeve and the bearing, and insulating fillers are arranged in the first contact part and / or the second contact part. According to the utility model, the problem of electrocorrosion caused by electrification of the bearing is solved, the service life of the main shaft is greatly prolonged, the volume of the main shaft is reduced without adding an insulating isolator outside, and the problem of non-insulation caused by pollution of a conductive object is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of insulating main shafts, in particular to an insulating main shaft. Background Art

[0002] At present, the spindles that need to work with electricity are mainly insulated from the outside by installing ceramic ball bearings or adding insulating materials on the outside. The traditional live spindles have the following main defects: ceramic ball bearings must be used, resulting in high costs and a narrow range of bearing selection. Although the ceramic balls in the ceramic ball bearings are not conductive, the lubricating grease is weakly conductive, so the ceramic ball bearings are not truly insulated. If the bearings are charged, electrical corrosion will occur, and electrical corrosion will greatly shorten the service life of the bearings. This is also the main reason why the service life of traditional live spindles is not long. If insulating spacers are installed on the outer wall of the spindle, the cost is increased and the volume of the spindle is increased. At the same time, the insulating material is easily contaminated by conductive objects on the outside. Utility Model Content

[0003] The utility model aims to provide an insulating main shaft to solve the above problems existing in the current insulating main shaft.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An insulating main shaft comprises an axis, a sleeve and a bearing, wherein the bearing is arranged on the axis, and the sleeve is arranged on the outside of the bearing, wherein a first contact portion is provided between the axis and the bearing, and a second contact portion is provided between the sleeve and the bearing, and insulating fillers are provided in the first contact portion and / or the second contact portion.

[0006] Furthermore, the outer wall of the shaft core is provided with a first mounting portion at the first contact portion, and the insulating filler is provided on the first mounting portion.

[0007] Furthermore, the outer wall of the axis is recessed inward to form the first mounting portion, and the insulating filler is arranged on the first mounting portion.

[0008] Furthermore, a bearing mounting sleeve is provided between the insulating filler and the inner ring of the bearing.

[0009] Furthermore, a second mounting portion is provided on the inner wall of the sleeve at the second contact portion, and the insulating filler is provided on the second mounting portion.

[0010] Furthermore, the inner wall of the shaft sleeve is recessed inward to form the second mounting portion, and the insulating filler is arranged on the second mounting portion.

[0011] Furthermore, a bearing mounting sleeve is provided between the insulating filler and the outer ring of the bearing.

[0012] Furthermore, the bearings are provided in two groups, which are respectively provided at the front and rear ends of the sleeve. The front end of the sleeve is provided with a front bearing outer ring locking and a dust cover, and the rear end of the sleeve is provided with a rear bearing outer ring locking and a dust cover.

[0013] Furthermore, the shaft center is provided with a front bearing inner ring front locking cover at the front end of the sleeve to prevent the bearing from moving.

[0014] Furthermore, the shaft center is provided with a rear bearing inner ring rear locking cover at the rear end of the sleeve to prevent the bearing from moving.

[0015] Beneficial effects of the utility model:

[0016] The insulated main shaft of the utility model achieves the purpose of insulating the live main shaft from the outside by arranging insulating fillers between the shaft center and the bearing or between the shaft sleeve and the bearing, or between the shaft center and the bearing and between the shaft sleeve and the shaft 3 at the same time. Compared with the traditional live main shaft, the insulated main shaft of the utility model solves the problem of electrical corrosion of the bearing due to electrification, greatly prolongs the service life of the main shaft, does not need to add insulating spacers on the outside, reduces the volume of the main shaft, and prevents the problem of non-insulation due to contamination by conductive objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the insulating main shaft of the utility model;

[0018] Figure 2 yes Figure 1 A schematic diagram of the structure from another angle;

[0019] Figure 3 It is a cross-sectional view of the insulating main shaft of the utility model.

[0020] The names corresponding to the marks in the figure are:

[0021] 1. Axis, 11. First mounting part, 2. Bushing, 3. Bearing, 4. Insulating filler, 5. Bearing mounting sleeve, 7. Front bearing outer ring locking and dust cover, 8. Rear bearing outer ring locking and dust cover, 9. Front bearing inner ring front locking cover, 10. Rear bearing inner ring rear locking cover. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] Embodiment 1 of the utility model:

[0024] like Figure 1 - Figure 3 As shown, the insulating spindle provided by the utility model comprises a shaft 1, a sleeve 2 and a bearing 3, wherein the bearing 3 is sleeved on the shaft 1 and the sleeve 2 is arranged on the outside of the bearing 3. In order to achieve insulation between the shaft 1 and the bearing 3, and between the sleeve 2 and the bearing 3, a first contact portion is provided between the shaft 1 and the bearing 3, and an insulating filler 4 is provided in the first contact portion, so that the shaft 1 and the bearing 3 are insulated. Compared with the traditional electrified spindle, the manufacturing cost is greatly reduced while the range of bearing selection is expanded, the problem of electrical corrosion of the bearing due to electrification is also solved, and the service life of the spindle is greatly extended. No insulating spacer is required to be added on the outside, the volume of the spindle is reduced, and the problem of non-insulation due to contamination by conductive objects is prevented.

[0025] like Figure 3 As shown, the outer wall of the shaft 1 is provided with a first mounting portion 11 at the first contact portion, and the first mounting portion 11 is a groove formed by the outer wall of the shaft 1 being recessed inward, and the insulating filler 4 is filled in the groove. Such a design not only ensures the stable installation of the insulating filler 4, but also makes the insulation effect between the shaft 1 and the bearing 3 more reliable.

[0026] It should be noted that the insulating filler can be selected from materials with good insulation and wear resistance, such as polytetrafluoroethylene (PTFE), rubber, ceramics or other insulating materials. These materials not only have good insulation properties, but are also wear-resistant and corrosion-resistant, and can effectively extend the service life of the spindle.

[0027] In order to further optimize the insulation effect, a bearing mounting sleeve 5 is provided between the insulating filler 4 and the inner ring of the bearing 3 , and the bearing mounting sleeve 5 increases the installation stability between the bearing 3 and the shaft center 1 .

[0028] In this embodiment, Figure 3 As shown, two groups of bearings 3 are provided, which are respectively installed at the front and rear ends of the sleeve 2. In order to ensure the stable installation and dustproof effect of the bearing 3, the front end of the sleeve 2 is provided with a front bearing outer ring locking and dust cover 7, and the rear end is provided with a rear bearing outer ring locking and dust cover 8. Such a design can not only effectively prevent dust and other impurities from entering the bearing, but also prevent the bearing from loosening due to vibration and other reasons.

[0029] At the same time, in order to prevent the bearing 3 from moving on the shaft 1, a front bearing inner ring front locking cover 9 is provided at the front end of the shaft 1 to block the bearing from moving, and a rear bearing inner ring rear locking cover 10 is provided at the rear end. The two locking covers are connected to the shaft 1 by threads or other means, so as to realize reliable locking of the bearing 3.

[0030] Embodiment 2 of the present utility model:

[0031] Different from the embodiment 1, there is a second contact portion between the sleeve and the bearing, and an insulating filler 4 is arranged in the second contact portion. The inner wall of the sleeve 2 is provided with a second mounting portion at the second contact portion, and the second mounting portion is a groove formed by the inner wall of the sleeve 2 being recessed inwardly, and the insulating filler 4 is also filled in the groove. Such a design makes the insulation effect between the sleeve 2 and the bearing 3 equally reliable.

[0032] Similarly, in order to further optimize the insulation effect, a bearing mounting sleeve is also provided between the insulating filler 4 and the outer ring of the bearing 3. The bearing mounting sleeve also increases the installation stability between the bearing 3 and the shaft sleeve 2 and enhances the insulation effect.

[0033] Embodiment 3 of the present utility model:

[0034] Different from the first and second embodiments, insulating fillers 4 are provided at both the first contact portion and the second contact portion to further improve the insulating effect.

[0035] The insulating spindle of the utility model achieves the purpose of insulating the live spindle from the outside by arranging an insulating filler 4 between the shaft 1 and the bearing 3 or between the sleeve 2 and the bearing 3, or between the shaft 1 and the bearing 3 and between the sleeve 2 and the bearing 3. At the same time, by optimizing the installation method of the bearing, the installation of the bearing 3 is made more stable and reliable. Compared with the traditional live spindle, the insulating spindle of the utility model is not only low-cost, but also has a more reliable insulation effect, effectively extending the service life of the bearing.

[0036] Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the protection scope of the utility model.

Claims

1. An insulating spindle, characterized in that: It includes an axis, a sleeve and a bearing, wherein the bearing is arranged on the axis, and the sleeve is arranged on the outside of the bearing, wherein a first contact portion is provided between the axis and the bearing, and a second contact portion is provided between the sleeve and the bearing, and an insulating filler is provided in the first contact portion and / or the second contact portion.

2. The insulating main shaft according to claim 1, characterized in that: The outer wall of the shaft core is provided with a first mounting portion at the first contact portion, and the insulating filler is provided on the first mounting portion.

3. The insulating main shaft according to claim 2, characterized in that: The outer wall of the shaft core is recessed inward to form the first mounting portion, and the insulating filler is arranged on the first mounting portion.

4. The insulating main shaft according to claim 3, characterized in that: A bearing mounting sleeve is arranged between the insulating filler and the inner ring of the bearing.

5. The insulating main shaft according to claim 1, characterized in that: The inner wall of the sleeve is provided with a second mounting portion at the second contact portion, and the insulating filler is provided on the second mounting portion.

6. The insulating main shaft according to claim 5, characterized in that: The inner wall of the shaft sleeve is recessed inward to form the second mounting portion, and the insulating filler is arranged on the second mounting portion.

7. The insulating main shaft according to claim 6, characterized in that: A bearing mounting sleeve is arranged between the insulating filler and the outer ring of the bearing.

8. The insulating main shaft according to any one of claims 1 to 7, characterized in that: The bearings are arranged in two groups, which are arranged at the front and rear ends of the sleeve respectively. The front end of the sleeve is provided with a front bearing outer ring locking and a dust cover, and the rear end of the sleeve is provided with a rear bearing outer ring locking and a dust cover.

9. The insulating main shaft according to claim 8, characterized in that: The shaft center is provided with a front bearing inner ring front locking cover at the front end of the sleeve to block the movement of the bearing.

10. The insulating main shaft according to claim 9, characterized in that: The shaft center is provided with a rear bearing inner ring rear locking cover at the rear end of the sleeve to prevent the bearing from moving.

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