CN213379306U

CN213379306U - Central water outlet main shaft

Info

Publication number: CN213379306U
Application number: CN202022523321.3U
Authority: CN
Inventors: 刁文龙; 刘晓锋; 刘俊义
Original assignee: Qingdao Changlong Zhizao Technology Co ltd
Current assignee: Qingdao Changlong Zhizao Technology Co ltd
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2021-06-08
Anticipated expiration: 2030-11-05

Abstract

The utility model discloses a central main shaft that goes out water, including the main shaft sleeve, rotatable main shaft is equipped with in the main shaft sleeve, and the drive wheel is installed to the rear end of main shaft, and the drill bit is installed to the front end of main shaft, and the main shaft is equipped with the centre bore that link up its both ends, and the rear end of drill bit inserts and fixes in the centre bore, and the rotary joint who is used for intercommunication supply channel and centre bore is installed to the rear end of main shaft. The beneficial effects of the utility model reside in that: in the process of drilling a workpiece, the cooling liquid can flow to the drill bit accurately in time, the cooling liquid is effectively prevented from splashing, the cooling effect of the drill bit is improved, and the service life of the drill bit is prolonged.

Description

Central water outlet main shaft

Technical Field

The utility model relates to a lathe main shaft technical field, specific theory relates to a central main shaft that goes out water.

Background

The main shaft is a main part of a machine tool, and can be drilled after a drill bit is arranged on the main shaft, and is used for drilling metal, wood and the like. During drilling, the drill bit is rubbed with metal, wood and the like to generate more heat, so that cooling liquid needs to be sprayed to the drill bit, and the drill bit is prevented from being damaged due to overhigh temperature.

The disadvantages of spraying water or cutting fluid are: 1. the coolant impact drill bit can splash around, which affects the sanitation of the processing environment. 2. The sprinkler usually adopts soft shower nozzle, and the coolant liquid can the off-direction at the in-process that sprays, and the coolant liquid sprays the trouble that the drill bit leads to the drill bit to damage easily to appear.

Disclosure of Invention

The utility model aims at providing a can directly carry out refrigerated center play water main shaft to the drill bit to solve the coolant liquid and can not spray on the drill bit and the problem that the coolant liquid splashes everywhere because of percussion bit.

In order to achieve the above object, the utility model discloses a rotatable main shaft is equipped with in the main shaft sleeve, the drive wheel is installed to the rear end portion of main shaft, and the drill bit is installed to the front end of main shaft, and its structural feature is the main shaft is equipped with the centre bore that link up its both ends, and the rear end portion of drill bit inserts and fixes in the centre bore, and the rotary joint who is used for intercommunication supply channel and centre bore is installed to the rear end of main shaft. The center water outlet main shaft is in work: the spindle sleeve is fixed on the machine tool, the driving wheel is in power connection with a motor of the machine tool through transmission parts such as a belt, the spindle rotates under the driving of the motor, the rotary joint is connected with the water supply pipeline, the water supply pipeline supplies cooling liquid, the cooling liquid can flow along the central hole, and finally the drill bit is infiltrated through a gap between the drill bit and the central hole, so that the purpose of heat dissipation of the drill bit is achieved. By adopting the structure, the mode that the cooling liquid is directly sprayed on the drill bit is changed, and the problems that the cooling liquid cannot be sprayed on the drill bit and is cooled to splash everywhere are solved.

The lower end part of the main shaft is provided with one or a plurality of threaded through holes at intervals up and down, fastening bolts are screwed in the threaded through holes, and the fastening bolts abut against the drill bit. The structure improves the fixing mode of the drill bit, and the drill bit is convenient to detach and install after the structure is adopted.

The main shaft is provided with a limiting step, a first locking nut is screwed at the position, located above the limiting step, of the main shaft, and the transmission wheel is located between the limiting step and the first locking nut. The structure improves the fixing mode of the driving wheel, thereby being convenient for replacing the driving wheel.

The front end of the main shaft sleeve is provided with a first step hole, a first tapered roller bearing and a first deep groove ball bearing are mounted in the first step hole, the rear end of the main shaft sleeve is provided with a second step hole, and a second tapered roller bearing and a second deep groove ball bearing are mounted in the second step hole. By adopting the structure, the main shaft can rotate more smoothly in the main shaft sleeve and can bear larger axial thrust, and the structure is suitable for processing deep holes.

The front end face of the main shaft sleeve is provided with a sealing groove, and a sealing ring is installed in the sealing groove. The sealing ring is used for sealing the front end of the main shaft sleeve, and lubricating oil can be prevented from flowing out of the front end of the main shaft sleeve when the bearing is lubricated.

And a second locking nut used for limiting the second tapered roller bearing and the second deep groove ball bearing in the second step hole is screwed on the part, close to the rear end face of the main shaft sleeve, of the main shaft. The second locking nut is beneficial to keeping the position of the bearing and is convenient for replacing the mounting core of the bearing.

The front end part of the main shaft sleeve is provided with a first oil hole communicated with a gap between the first deep groove ball bearing and the first tapered roller bearing. Lubricating oil can be injected between the first deep groove ball bearing and the first tapered roller bearing through the first oil injection hole, and the bearing is lubricated in time.

And a second oil hole communicated with a gap between the second deep groove ball bearing and the second tapered roller bearing is formed in the rear end part of the main shaft sleeve. Lubricating oil can be injected between the second deep groove ball bearing and the second tapered roller bearing through the second oil injection hole, and the bearing is lubricated in time.

The water guide groove axially extending along the main shaft and penetrating through the front end face of the main shaft is distributed on the main shaft, a water through hole communicated with the central hole is formed in the bottom of the water guide groove, a sheath is screwed at the front end of the main shaft and completely covers the water guide groove, and the front end of the sheath is longer than the main shaft. After adopting above-mentioned structure, the coolant liquid can flow to the guiding gutter through the limbers, flows to the drill bit from the lower extreme of guiding gutter again, and the coolant liquid that flows to the drill bit like this is more, more in time, is suitable for the cooling when the drill bit rotates at a high speed.

The front end of the sheath is connected with a cone with a contracted opening. The cone cylinder that the oral area shrink has the effect of gathering together to the coolant liquid, guarantees its more accurate flow to the drill bit, has further avoided cooling and has splashed, and this kind of mode is better to the cooling effect of drill bit.

The utility model discloses can use on equipment such as lathe, drilling machine. The beneficial effects of the utility model reside in that: in the process of drilling a workpiece, the cooling liquid can flow to the drill bit accurately in time, splashing of the cooling liquid is effectively avoided, the cooling effect of the drill bit is improved, and the service life of the drill bit is prolonged.

Drawings

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:

fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 taken along line A-A;

fig. 3 is a perspective view of a first embodiment of the present invention;

fig. 4 is a schematic structural diagram of a second embodiment of the present invention;

fig. 5 is a cross-sectional view taken along line B-B of fig. 4.

Detailed Description

Referring to fig. 1, 2 and 3, in a first embodiment of the present invention, the central water outlet spindle includes a spindle sleeve 1, a rotatable spindle 2 is installed in the spindle sleeve 1, a driving wheel 3 is installed at the rear end of the spindle 2, and the driving wheel 3 may adopt a belt wheel, a chain wheel, a gear, etc., wherein the belt wheel is the best. The transmission wheel 3 and the main shaft 2 can be connected by adopting a spline or a flat key, in order to fix the transmission wheel 3, a limiting step 9 is arranged on the main shaft 2, a first locking nut 10 is screwed at the position of the main shaft 2 above the limiting step 9, and the transmission wheel 3 is positioned between the limiting step 9 and the first locking nut 10. The front end of the main shaft 2 is provided with a drill bit 4, the drill bit 4 can be a U-shaped drill or a common twist drill and the like, the main shaft 2 is provided with a center hole 5 running through the two ends of the main shaft, and the rear end part of the drill bit 4 is inserted into and fixed in the center hole 5. In order to fix the drill bit 4, the lower end part of the main shaft 2 is provided with one or a plurality of threaded through holes 7 at intervals up and down, fastening bolts 8 are screwed in the threaded through holes 7, and the fastening bolts 8 are abutted against the drill bit 4. The rear end of the main shaft 2 is provided with a rotary joint 6 for communicating a water supply pipeline with a central hole 5.

Referring to fig. 2, in order to realize smooth rotation of the main shaft 2 in the main shaft sleeve 1 and enable the main shaft 2 to bear axial thrust, a first stepped hole 11 is formed in the front end of the main shaft sleeve 1, a first tapered roller bearing 12 and a first deep groove ball bearing 13 are installed in the first stepped hole 11, a second stepped hole 14 is formed in the rear end of the main shaft sleeve 1, and a second tapered roller bearing 15 and a second deep groove ball bearing 16 are installed in the second stepped hole 14. In order to keep the bearings stably connected with the main shaft 2 and the main shaft sleeve 1, a second lock nut 19 for limiting the second tapered roller bearing 15 and the second deep groove ball bearing 16 in the second step hole 14 is screwed on the main shaft 2 close to the rear end face of the main shaft sleeve 1.

Referring to fig. 2, in order to facilitate the lubrication of the bearings, the front end portion of the main shaft sleeve 1 is provided with a first oil hole 20 that opens into a gap between the first deep groove ball bearing 13 and the first tapered roller bearing 12. The rear end part of the main shaft sleeve 1 is provided with a second oil hole 21 which leads to the gap between the second deep groove ball bearing 16 and the second tapered roller bearing 15. In order to prevent the lubricating oil from flowing out of the lower end of the main shaft sleeve 1, a seal groove 17 is provided on the front end surface of the main shaft sleeve 1, and a seal ring 18 is installed in the seal groove 17.

Referring to fig. 4 and 5, the second embodiment of the present invention is further improved on the basis of the first embodiment, a water guiding groove 22 axially extending along the main shaft 2 and penetrating through the front end surface of the main shaft 2 is distributed on the improved main shaft 2, a water through hole 23 communicating with the central hole 5 is arranged at the bottom of the water guiding groove 22, a sheath 24 is screwed on the front end of the main shaft 2, the sheath 24 completely covers the water guiding groove 22, and the front end of the sheath 24 is longer than the main shaft 2. The front end of the sheath 24 is connected with a cone 25 with a contracted mouth part.

The working mode of the central water outlet main shaft is as follows: the spindle sleeve 1 is fixed on a machine tool, a driving wheel 3 is in power connection with a motor of the machine tool through transmission parts such as a belt, a spindle 2 rotates under the driving of the motor, a rotary joint 6 is connected with a water supply pipeline, cooling liquid is supplied by the water supply pipeline and flows along a center hole 5, and finally the drill bit 4 is infiltrated through a gap between the drill bit 4 and the center hole 5, so that the purpose of heat dissipation of the drill bit 4 is achieved. After the improvement of the second embodiment is adopted, the cooling liquid can flow to the water guide groove 22 through the water through hole 23 and then flow to the drill bit 4 from the lower end of the water guide groove 22, so that the cooling liquid flowing to the drill bit 4 is more and more timely, and is suitable for cooling when the drill bit rotates at a high speed, the conical barrel 25 with the contracted opening has a gathering effect on the cooling liquid, the cooling liquid can accurately flow to the drill bit 4, splashing of the cooling liquid can be further prevented, and the cooling effect on the drill bit 4 is better.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a center main shaft that goes out water, includes main shaft sleeve (1), is equipped with rotatable main shaft (2) in main shaft sleeve (1), and drive wheel (3) are installed to the rear end portion of main shaft (2), and drill bit (4) are installed to the front end of main shaft (2), characterized by main shaft (2) are equipped with centre bore (5) of lining up its both ends, and the rear end portion of drill bit (4) inserts and fixes in centre bore (5), and rotary joint (6) that are used for communicateing water supply pipe and centre bore (5) are installed to the rear end of main shaft (2).

2. The central water outlet main shaft according to claim 1, wherein the lower end part of the main shaft (2) is provided with one or a plurality of threaded through holes (7) arranged at intervals up and down, fastening bolts (8) are screwed in the threaded through holes (7), and the fastening bolts (8) are abutted against the drill bit (4).

3. The central water outlet spindle according to claim 1, wherein the spindle (2) is provided with a limit step (9), a first lock nut (10) is screwed on the part of the spindle (2) above the limit step (9), and the transmission wheel (3) is positioned between the limit step (9) and the first lock nut (10).

4. The central water outlet main shaft according to claim 1, wherein the front end of the main shaft sleeve (1) is provided with a first step hole (11), a first tapered roller bearing (12) and a first deep groove ball bearing (13) are installed in the first step hole (11), the rear end of the main shaft sleeve (1) is provided with a second step hole (14), and a second tapered roller bearing (15) and a second deep groove ball bearing (16) are installed in the second step hole (14).

5. The central water outlet spindle according to claim 4, wherein a sealing groove (17) is formed in the front end face of the spindle sleeve (1), and a sealing ring (18) is installed in the sealing groove (17).

6. The central water outlet main shaft according to claim 4, wherein a second locking nut (19) for limiting the second tapered roller bearing (15) and the second deep groove ball bearing (16) in the second stepped hole (14) is screwed on the main shaft (2) close to the rear end face of the main shaft sleeve (1).

7. The central water outlet main shaft according to claim 4, wherein the front end part of the main shaft sleeve (1) is provided with a first oil filling hole (20) leading to a gap between the first deep groove ball bearing (13) and the first tapered roller bearing (12).

8. The central water outlet main shaft according to claim 4, wherein the rear end part of the main shaft sleeve (1) is provided with a second oil filling hole (21) leading to a gap between the second deep groove ball bearing (16) and the second tapered roller bearing (15).

9. The central water outlet spindle according to any one of claims 1 to 8, wherein a water guide groove (22) axially extending along the spindle (2) and penetrating through the front end face of the spindle is annularly distributed on the spindle (2), a water through hole (23) communicating with the central hole (5) is formed in the bottom of the water guide groove (22), a sheath (24) is screwed at the front end of the spindle (2), the water guide groove (22) is completely covered by the sheath (24), and the front end of the sheath (24) is longer than the spindle (2).

10. A central outlet spindle according to claim 9, characterized in that the front end of the sheath (24) is connected with a cone (25) with a constricted mouth.