Composite spiral sealing mechanism for automatic lathe spindle

Abstract

The utility model relates to a composite spiral sealing mechanism for an automatic lathe spindle, which comprises a spindle sleeve, a bearing arranged in the spindle sleeve and a spindle arranged in the bearing in a penetrating mode, the front end of the spindle extends out of the spindle sleeve, a front nut is sleeved on the extending portion of the spindle, and the rear end of the front nut is connected with the spindle sleeve. The front end of the front screw cap is provided with a blocking cap screw cap, the blocking cap screw cap is sleeved outside the main shaft, a plurality of labyrinth type chip channels with zigzag structures are arranged in a connecting surface between the blocking cap screw cap and the front screw cap, and the blocking cap screw cap and the front screw cap are sleeved with a protective ring outer cover. Two mechanical spiral labyrinth type sealing structures are adopted, an end face form of a V-shaped oil seal, coarse and fine filtration of oil scraps and an end face sealing mode of the V-shaped oil seal are added, the oil scraps can be completely blocked outside a bearing of a main shaft, and the main shaft cannot be overheated due to a combined sealing mode of a mechanical structure.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic lathes, and particularly relates to a composite spiral sealing mechanism for the spindle of an automatic lathe.

Background Art

[0002] When an automatic lathe is working and cutting parts, a lot of oil chips will be generated. These oil chips will fly everywhere, and some will enter the bearings of the spindle from the front end of the spindle, causing damage to the bearings of the spindle.

[0003] Most current automatic lathes use TC skeleton oil seals to seal the front end of the spindle to prevent oil chips from entering the bearings of the spindle. However, this type of skeleton seal cannot adapt to the high-speed rotation of the spindle and will cause the spindle to overheat.

Content of the Utility Model

[0004] To solve the above problems, the purpose of the utility model is to provide a composite spiral sealing mechanism for the spindle of an automatic lathe that can effectively prevent oil chips from entering the bearings of the spindle and will not cause the spindle to overheat.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a composite spiral sealing mechanism for the spindle of an automatic lathe, including a spindle sleeve, a bearing arranged in the spindle sleeve, and a spindle passing through the bearing. The front end of the spindle extends out of the spindle sleeve. A front nut is sleeved on the extended part of the spindle, and the rear end of the front nut is connected to the spindle sleeve. A retaining cap nut is arranged at the front end of the front nut, and the retaining cap nut is sleeved outside the spindle. In the connection surface between the retaining cap nut and the front nut, there are multiple labyrinth chip channels with a zigzag structure. A protective ring outer cover is sleeved outside the retaining cap nut and the front nut.

[0006] The composite spiral sealing mechanism for the spindle of an automatic lathe in the utility model is further set as: there is an annular sealing cavity between the front nut and the spindle, and a V-shaped sealing ring is arranged in the sealing cavity. A gasket is arranged between the front nut and the bearing, and a V-shaped oil seal structure is formed between the V-shaped sealing ring and the gasket.

[0007] The composite spiral sealing mechanism for the spindle of an automatic lathe in the utility model is further set as: two chip outlets are arranged at the bottom of the protective ring outer cover, and the two chip outlets are located at the front end and the rear end of the protective ring outer cover.

[0008] The composite spiral sealing mechanism for the spindle of an automatic lathe in the utility model is further set as: the retaining cap nut and the spindle are connected by interference fit, and a pin is arranged in the retaining cap nut, and the head of the pin is pressed into the spindle.

[0009] One kind of composite spiral seal mechanism for the spindle of an automatic lathe in the utility model is further arranged as follows: The rear end of the front nut is connected to the spindle sleeve through a threaded structure.

[0010] Compared with the prior art, the utility model has the following beneficial effects: The above-mentioned composite spiral seal mechanism for the spindle of an automatic lathe adopts a two-stage mechanical spiral labyrinth seal structure, plus the end face form of a V-shaped oil seal, which filters oil chips in a coarse and fine manner and seals the end face of the V-shaped oil seal. It can completely block oil chips outside the bearings of the spindle, and the combined seal method of the mechanical structure will not cause overheating of the spindle.

Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of the utility model.

[0012] In the figure: 1. Spindle sleeve, 2. Bearing, 3. Spindle, 4. Front nut, 5. Seal cavity, 6. V-shaped sealing ring, 7. Retaining cap nut, 8. Pin, 9. Labyrinth chip channel, 10. Protective ring outer cover, 11. Chip outlet, 12. Gasket.

Specific Embodiments

[0013] The following further describes in detail the above-mentioned composite spiral seal mechanism for the spindle of an automatic lathe in the utility model through specific embodiments.

[0014] As Figure 1 shown, a composite spiral seal mechanism for the spindle of an automatic lathe includes a spindle sleeve 1, a bearing 2 arranged in the spindle sleeve 1, and a spindle 3 passing through the bearing 2. The front end of the spindle 3 extends out of the spindle sleeve 1. A front nut 4 is sleeved on the extending part of the spindle 3. The rear end of the front nut 4 is connected to the spindle sleeve 1 through a threaded structure. An annular seal cavity 5 exists between the front nut 4 and the spindle 3. A V-shaped sealing ring 6 is arranged in the seal cavity 5. A gasket 12 is arranged between the front nut 4 and the bearing 2. A V-shaped oil seal structure is formed between the V-shaped sealing ring 6 and the gasket 12. A retaining cap nut 7 is arranged at the front end of the front nut 4. The retaining cap nut 7 is sleeved on the outside of the spindle 3. The retaining cap nut 7 is connected to the spindle 3 by interference fit, and a pin 8 is arranged in the retaining cap nut 7. The head of the pin 8 is pushed into the spindle 3. In the connection surface between the retaining cap nut 7 and the front nut 4, a labyrinth chip channel 9 with multiple zigzag structures is arranged. The outside of the retaining cap nut 7 and the front nut 4 is sleeved with a protective ring outer cover 10. Two chip outlets 11 are arranged at the bottom of the protective ring outer cover 10. The two chip outlets 11 are located at the front end and the rear end of the protective ring outer cover 10.

[0015] The working principle of the present utility model is as follows: For the above-mentioned composite spiral seal mechanism of the automatic lathe spindle 3, when the automatic lathe is operating, after the splashing oil and chips enter the retaining cap nut 7 and the retaining ring outer cover 10, most of the flying chips will leak out from the front chip outlet 11 of the retaining ring outer cover 10, and some fine chips will enter the labyrinth chip channel 9 between the retaining cap nut 7 and the front nut 4. The chips that can pass through the labyrinth chip channel 9 will leak out from the rear chip outlet 11 of the retaining ring outer cover 10, and only a very small part of the chips will enter the sealing cavity 5 between the front nut 4 and the spindle 3, and will be blocked by the V-shaped sealing ring 6 and will not enter the bearing 2 of the spindle 3. It adopts a two-way mechanical spiral labyrinth sealing structure, combined with the end face form of the V-shaped oil seal, for the coarse filtration of oil and chips and the end face sealing method of the V-shaped oil seal, which can completely block the oil and chips outside the bearing 2 of the spindle 3, and the combined sealing method of the mechanical structure will not cause the spindle 3 to overheat.

[0016] The above embodiments are only illustrative of the principles and effects of the present invention and some applied embodiments, rather than limiting the present utility model; it should be noted that for those of ordinary skill in the art, without departing from the creative concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model.

Claims

1. A composite spiral sealing mechanism for a main shaft of an automatic lathe, comprising a main shaft sleeve, a bearing arranged in the main shaft sleeve and a main shaft passing through the bearing, characterized in that: The front end of the spindle extends out of the spindle sleeve, and a front nut is sleeved on the protruding part of the spindle. The rear end of the front nut is connected to the spindle sleeve, and a blocking cover nut is provided at the front end of the front nut. The blocking cover nut is sleeved on the outside of the spindle, and a multi-torque labyrinth chip channel is provided in the connecting surface between the blocking cover nut and the front nut. A guard ring cover is sleeved on the outside of the spindle.

2. A composite spiral sealing mechanism for an automatic lathe spindle as claimed in claim 1, characterized in that: An annular sealing cavity is provided between the front nut and the main shaft, a V-shaped sealing ring is provided in the sealing cavity, a gasket is provided between the front nut and the bearing, and a V-shaped oil seal structure is formed between the V-shaped sealing ring and the gasket.

3. A composite spiral sealing mechanism for an automatic lathe spindle as claimed in claim 1 or 2, characterized in that: The bottom of the guard ring outer cover is provided with two chip outlets, and the two chip outlets are located at the front end and the rear end of the guard ring outer cover.

4. A composite spiral sealing mechanism for an automatic lathe spindle as claimed in claim 1 or 2, characterized in that: The blocking cover nut is connected to the main shaft by interference fit, and a pin is arranged in the blocking cover nut, and the head of the pin is pushed into the main shaft.

5. A composite spiral sealing mechanism for an automatic lathe spindle as claimed in claim 1 or 2, characterized in that: The rear end of the front nut is connected to the main shaft sleeve through a threaded structure.

Images