CN210661372U - Maze protective structure of central main shaft is attacked to numerical control brill - Google Patents
Maze protective structure of central main shaft is attacked to numerical control brill Download PDFInfo
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- CN210661372U CN210661372U CN201921119055.9U CN201921119055U CN210661372U CN 210661372 U CN210661372 U CN 210661372U CN 201921119055 U CN201921119055 U CN 201921119055U CN 210661372 U CN210661372 U CN 210661372U
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- main shaft
- labyrinth
- ring
- protective structure
- axle core
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Abstract
The utility model discloses a maze protective structure of central main shaft is attacked to numerical control brill, including the axle core, front end bearing and rear end bearing have been cup jointed on the axle core respectively, main shaft front end housing and main shaft rear end cap are installed respectively to the both ends of axle core, one side and the air inlet joint of main shaft front end housing are linked together, still including setting up interior labyrinth ring and the outer labyrinth ring in front end bearing one side, the main shaft front end housing with be provided with the gas injection ring between the axle core, be provided with the round annular with the coaxial department of gas flow channel on the gas injection ring. The utility model provides a pair of maze protective structure of central main shaft is attacked to numerical control brill, good protective structure can guarantee the cleanness of main shaft bearing running environment, ensures that the bearing rotation precision does not receive the influence because of the entering of impurity such as water smoke to can guarantee good precision under the long-term running condition of main shaft, improve the running life of main shaft, reduce and sell the cost of clothes, the suitability is wider.
Description
Technical Field
The utility model relates to a digit control machine tool technical field, concretely relates to is a maze protective structure of central main shaft is attacked to numerical control brill.
Background
The existing main shaft of the drilling and tapping machine has the problems that once impurities enter the inside of the main shaft of the drilling and tapping machine, the lubricating environment of a main shaft bearing is abnormal easily, the main shaft is abnormal in sound, the main shaft runs for a long time and even can be blocked, the using effect of the main shaft is influenced, and the problems are always the problems of the normal working precision and the working life of the main shaft of the drilling and tapping machine.
The existing drilling and tapping main shaft on the market generally only adopts a front-end air curtain blowing mode to prevent external foreign matters from entering the main shaft, but is limited by the uniformity of air curtain blowing and the difference of air pressure, the protection effect is not ideal, and the occurrence of the fault with high proportion still can be realized.
Take the main shaft on the market in fig. 1 as an example:
because the front end of the main shaft is close to a workpiece in the working process, the splashing speed of cutting impurities and cutting fluid at the front end is high, and the splashing impurities, dust and the like are difficult to block from entering the main shaft by blowing air through a single air curtain;
in the actual production operation process of a factory, due to more field variables and poor controllability of the working environment, the air pressure of the air curtain may be unstable, and at the moment, the protection effect cannot be achieved by the air curtain protection structure alone;
after the main shaft is stopped, although the air curtain blowing can continuously work, sometimes the condition that the blowing is stopped cannot be eliminated, dust, impurities, water vapor and the like still exist in a workshop at the moment, and the foreign matters can enter the inside of the main shaft and cause the main shaft fault after long-term accumulation;
when the spindle works on the machine table, the spindle achieves the tool changing effect through the tool changing cam on the machine table, tool changing devices of the machine tables are often in an excessive lubricating state, and excessive lubricating grease can drip near an air gap opening at the rear end of the spindle and gradually seep into the spindle to cause spindle failure.
Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
In view of the foregoing prior art, an object of the present invention is to provide a labyrinth protective structure for a numerical control drilling and tapping central spindle, which can ensure accuracy, improve service life and reduce cost.
For solving the technical problem, the utility model discloses following technical scheme has been taken:
the utility model provides a numerical control bores maze protective structure of attacking central main shaft, includes the axle core, front end bearing and rear end bearing have been cup jointed on the axle core respectively, main shaft front end housing and main shaft rear end cap are installed respectively to the both ends of axle core, one side and the air inlet joint of main shaft front end housing are linked together, still including setting up in front end bearing one side the interior labyrinth ring and outer labyrinth ring, the main shaft front end housing with be provided with the gas injection ring between the axle core, be provided with the round annular with the coaxial department of gas flow channel on the gas injection ring.
The labyrinth protective structure is characterized in that a labyrinth structure is formed between the inner labyrinth ring and the outer labyrinth ring.
The labyrinth protection structure further comprises a locking nut which is arranged on the shaft core and matched with the rear end cover of the main shaft, and a labyrinth structure is formed between the rear end cover of the main shaft and the locking nut.
The labyrinth protective structure is characterized in that the matching mode of the air injection ring and the front end cover of the main shaft is interference fit.
The labyrinth protective structure is characterized in that the matching mode of the air injection ring and the front end cover of the main shaft is an O-shaped ring sealing mode.
The labyrinth protective structure is characterized in that a triangular annular groove is formed in the position, contacting with the annular groove, on the outer circle of the shaft core.
The labyrinth protective structure, wherein, the quantity of triangle-shaped annular is 3 at least.
The labyrinth protection structure is characterized in that the labyrinth structure is a concave bending structure.
The labyrinth protective structure is characterized in that an inner spacing ring is further arranged between the shaft core and the main shaft body.
The labyrinth protective structure is characterized in that a front sealing cover is arranged on one side of the front end cover of the main shaft.
Compared with the prior art, the utility model discloses a numerical control bores maze protective structure of attacking central main shaft, including the axle core, front end bearing and rear end bearing have been cup jointed on the axle core respectively, main shaft front end housing and main shaft rear end cap are installed respectively to the both ends of axle core, one side and the air inlet joint of main shaft front end housing are linked together, still including setting up interior labyrinth ring and the outer labyrinth ring in front end bearing one side, the main shaft front end housing with be provided with the gas injection ring between the axle core, be provided with the round annular with the coaxial department of gas flow channel on the gas injection ring.
The utility model has the advantages that:
1. ensuring the precision: the good protection structure can ensure the cleanness of the operation environment of the main shaft bearing and ensure that the rotation precision of the bearing is not influenced by the entering of impurities such as water mist and the like, thereby ensuring the good precision of the main shaft under the long-term operation condition.
2. The service life is prolonged: once impurities such as water mist enter the bearing, the service life of the bearing is greatly influenced for a long time, and therefore the service life of the main shaft can be effectively prolonged by the labyrinth protection structure.
3. The service cost is reduced: for a main shaft manufacturer, the water inflow (including other impurities) of the main shaft in batches can bring great loss, the service sale and maintenance cost can be greatly improved, and the labyrinth protective structure can effectively reduce the service sale cost, so that the profit of an enterprise is improved.
4. The applicability is wider: because this structure has good barrier propterty, so also be applicable under the comparatively abominable condition of operating mode, needn't worry the main shaft and can damage because of advancing impurity.
Drawings
Fig. 1 is a schematic view of the spindle protection structure on the market in the prior art provided by the present invention.
Fig. 2 is a front sectional view of the labyrinth protective structure provided by the present invention.
Fig. 3 is an enlarged view of the I-position of the labyrinth protection structure in fig. 2 according to the present invention.
Fig. 4 is an enlarged view of the J point of the labyrinth protection structure in fig. 2 according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "on," "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.
The embodiment of the utility model provides a numerical control bores maze protective structure of attacking central main shaft please refer to 1-4, including axle core 12, front end bearing 6 and rear end bearing 15 have been cup jointed on the axle core 12 respectively, main shaft front end housing 2 and main shaft rear end cap 9 are installed respectively to the both ends of axle core 12, one side and the admission joint 4 of main shaft front end housing 2 are linked together, maze protective structure is still including setting up interior labyrinth ring 14 and the outer labyrinth ring 13 in front end bearing 6 one side, main shaft front end housing 2 with be provided with between the axle core 12 and spout gas ring 3, spout and be provided with round annular 16 with gas flow channel's coaxial department on the gas ring 3.
In this embodiment, when the spindle works, the front sealing cover 1, the inner spacer ring 7, the lock nut 10, the inner labyrinth ring 14, the spindle core 12 and a broach system (not shown in the figure) inside the spindle core 12 are in a high-speed running state under the action of the coupler 11 and the bearing 6, other components (the spindle body 5 and the like) are in a relatively static state, and external impurities can enter the spindle only at a position where a gap between a front end rotating member and a rear end rotating member and a non-rotating member is formed (shown in A, C in the figure).
When the main shaft is in a high-speed running state, centrifugal force generated by the outer rings of the front sealing cover 1 and the locking nut 10 can play a certain resisting role for external impurities, namely centrifugal sealing, the sealing effect is higher when the rotating speed of the main shaft is higher, and if the main shaft is stopped, the sealing effect is invalid, so that the main shaft is a first-layer protection structure.
Referring to fig. 2, in addition, since the front end of the spindle has a large amount of cutting fluid and chip dust during cutting, and the risk of impurities entering the front end is much higher than that of the rear end, the front end forms an air curtain protective layer at a position a by blowing air, specifically, the air source enters an air flow passage of the spindle bore through a quick coupling, in this embodiment, the air injection ring 3 and the spindle front end cap 2 are in interference fit at a position B, although, optionally, the air injection ring 3 and the spindle front end cap 2 can be in an O-ring sealing manner, while the air injection ring 3 processes a ring of annular grooves 16 at a position D, the air forms an annular air flow to continue to travel downwards (the position B is in interference fit, and therefore does not go upwards), the spindle front end cap 2 and the air injection ring 3 have a small gap of about 0.1mm at a position E, although there is a turn right at F, because the speed direction of the gas is vertical downward, most of the gas will continue downward and then blow out uniformly from the opening A in a ring shape, and can effectively block the invasion of external impurities. And even if the main shaft is in a stop state, the air blowing can be continuously performed, so that the defect of centrifugal sealing is overcome.
Referring to fig. 2, although the spindle can basically ensure a good operating environment inside the spindle under the action of the first 2 layers of protection, the centrifugal seal fails when the spindle is stationary, and the pneumatic seal is also difficult to ensure stable supply of the pneumatic pressure and may even fail, in which case external impurities may enter the spindle from two gaps A, C, and the impurities actually enter the bearing inside the spindle and need to pass through a complicated labyrinth passage, which is the third layer of protection of the spindle, i.e., the labyrinth seal, and is the most safe protection structure of the spindle.
Specifically, the impurities at the front end enter from the gap a, move rightwards for a short distance and then touch an upward curve, because the main shaft is vertically installed at the drilling and tapping center, the impurities need to overcome the resistance of an air curtain at the position and still overcome the self gravity of the impurities to present a climbing state, after climbing to a first step, move rightwards continuously at the position F and move to the gap (about 0.1mm) between the shaft core 12 and the air injection ring 3, at the moment, the impurities can move upwards continuously if entering the bearing, and move upwards in a long straight way, triangular ring grooves 17 are arranged at the positions, which are in contact with the ring grooves 16, on the excircle of the shaft core 12, the number of the triangular ring grooves 17 is at least 3, and 3 decompression regions are formed in the 3 regions, so that the impurities can move more difficultly until the impurities move to the position G, and then are closer to the bearing position.
Furthermore, here the shaft core 12 is abutted against the inner labyrinth ring 14, there is a gap between the inner labyrinth ring 14 and the air injection ring 3 so that the impurities can only travel to the left, the outer labyrinth ring 13 is also abutted against the front end cover 2 of the main shaft, the impurities travel to the position H only to have an upward path, and this path is a complex labyrinth structure with a gap of about 0.2mm formed between the outer labyrinth ring 13 and the inner labyrinth ring 14, the labyrinth structure is a concave-character bent structure, the impurities can hardly enter the inside of the bearing through the bent path without external power, so that an excellent protection effect is achieved, the labyrinth structure at the rear end has the same principle as that at the a end, and the labyrinth structure is formed between the rear end cover 9 of the main shaft and the lock nut 10 to protect the bearing at the rear end.
Furthermore, an inner spacing ring 7 is arranged between the shaft core 12 and the main shaft body 5, and a front sealing cover 1 is arranged on one side of the main shaft front end cover 2, so that the protection effect is further achieved.
To sum up, the utility model discloses a numerical control bores maze protective structure of attacking central main shaft, including the axle core, front end bearing and rear end bearing have been cup jointed on the axle core respectively, main shaft front end housing and main shaft rear end cap are installed respectively to the both ends of axle core, one side and the air inlet joint of main shaft front end housing are linked together, still including setting up interior labyrinth ring and the outer labyrinth ring in front end bearing one side, the main shaft front end housing with be provided with the gas injection ring between the axle core, be provided with the round annular with the coaxial department of gas flow channel on the gas injection ring.
The utility model has the advantages that:
1. ensuring the precision: the good protection structure can ensure the cleanness of the operation environment of the main shaft bearing and ensure that the rotation precision of the bearing is not influenced by the entering of impurities such as water mist and the like, thereby ensuring the good precision of the main shaft under the long-term operation condition.
2. The service life is prolonged: once impurities such as water mist enter the bearing, the service life of the bearing is greatly influenced for a long time, and therefore the service life of the main shaft can be effectively prolonged by the labyrinth protection structure.
3. The service cost is reduced: for a main shaft manufacturer, the water inflow (including other impurities) of the main shaft in batches can bring great loss, the service sale and maintenance cost can be greatly improved, and the labyrinth protective structure can effectively reduce the service sale cost, so that the profit of an enterprise is improved.
4. The applicability is wider: because this structure has good barrier propterty, so also be applicable under the comparatively abominable condition of operating mode, needn't worry the main shaft and can damage because of advancing impurity.
The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, and these forms are within the scope of the present invention.
Claims (10)
1. The utility model provides a numerical control bores maze protective structure of attacking central main shaft, includes the axle core, front end bearing and rear end bearing have been cup jointed on the axle core respectively, main shaft front end housing and main shaft rear end cap are installed respectively to the both ends of axle core, one side of main shaft front end housing is linked together with the air inlet connector, its characterized in that, still including setting up interior labyrinth ring and the outer labyrinth ring in front end bearing one side, the main shaft front end housing with be provided with the gas injection ring between the axle core, be provided with the round annular with the coaxial department of gas flow channel on the gas injection ring.
2. Labyrinth shielding structure according to claim 1, characterized in that a labyrinth is formed between the inner labyrinth ring and the outer labyrinth ring.
3. The labyrinth protective structure as claimed in claim 1, further comprising a lock nut provided on the shaft core to be engaged with the main shaft rear end cover, wherein a labyrinth structure is formed between the main shaft rear end cover and the lock nut.
4. The labyrinth shield structure as recited in claim 1, wherein the manner of engagement of the jet ring with the main shaft front end cap is an interference fit.
5. The labyrinth shield as recited in claim 1, wherein the mating of the jet ring with the spindle nose cap is by way of an O-ring seal.
6. The labyrinth protective structure as claimed in claim 1, wherein a triangular ring groove is provided on the outer circle of the shaft core in contact with the ring groove.
7. Labyrinth shielding structure according to claim 6, characterized in that the number of triangular ring grooves is at least 3.
8. Labyrinth shielding structure according to claim 2 or 3, characterized in that the labyrinth structure is a zigzag structure.
9. The labyrinth protective structure as claimed in claim 1, wherein an inner spacer ring is further provided between the spindle core and the spindle body.
10. The labyrinth protective structure as claimed in any one of claims 1 to 7, wherein a front sealing cover is provided at one side of the main shaft front end cover.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921119055.9U CN210661372U (en) | 2019-07-17 | 2019-07-17 | Maze protective structure of central main shaft is attacked to numerical control brill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921119055.9U CN210661372U (en) | 2019-07-17 | 2019-07-17 | Maze protective structure of central main shaft is attacked to numerical control brill |
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| CN210661372U true CN210661372U (en) | 2020-06-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111716245A (en) * | 2020-06-03 | 2020-09-29 | 广州市昊志机电股份有限公司 | Main shaft structure |
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2019
- 2019-07-17 CN CN201921119055.9U patent/CN210661372U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111716245A (en) * | 2020-06-03 | 2020-09-29 | 广州市昊志机电股份有限公司 | Main shaft structure |
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