CN217831879U - Electric spindle device with reinforced water cooling structure - Google Patents

Abstract

The utility model belongs to the technical field of equipment, concretely relates to possesses electric spindle unit who strengthens water-cooling structure, include: the rotor is provided with a front bearing seat and a positioning block, the front end of the positioning block is provided with a pre-tightening elastic body, and the front end of the positioning block is provided with a pre-tightening elastic body; the front end of the front bearing seat and the rear end of the positioning block are respectively provided with a front end cover and a rear end cover in a joint mode, and rear bearings are arranged in the positioning block side by side; the pre-tightening elastic body is elastically abutted to the outer retainer of the rear bearing, the front end of the front end cover is provided with a concave oil seal in a concave mode, and the strengthening assembly further comprises a cylinder and a cascade driving piece which are arranged at the rear end of the strengthening assembly. Through addding pretension elastomer butt rear bearing pretension, have optimization and reduce loss and dimension steady noise reduction function, the font oil blanket coats the lubricated membrane and adsorbs impurity, plays steady sealing effect, cascades driving piece and promotes the cylinder, and the quick release buffering resets, realizes that the electricity main shaft device that possesses the intensive water-cooling structure is stable lasting and safe and reliable's efficiency.

Description

Electric spindle device with reinforced water cooling structure

Technical Field

The utility model belongs to the technical field of equipment, concretely relates to possesses electric spindle unit who strengthens water-cooling structure.

Background

The electric spindle is a new technology integrating a machine tool spindle and a spindle motor, is well matched with a linear motor and a novel cutter, and leads high-speed machining to enter a new era. As the combined transmission structure of the spindle motor and the machine tool spindle, the length of a main transmission chain of the machine tool is shortened to zero by the electric spindle, so that zero transmission of the machine tool is realized, the spindle part is relatively and independently formed into a spindle unit from a transmission system of the equipment and the integral structure, and the combined transmission structure has the advantages of high rotating speed, high precision, low noise motion characteristic, compact structure and quick response. The numerical control machine tool or the machining center has the advantages that the automatic tool changing structure and the good automatic tool changing system are required to realize one-time clamping multi-procedure machining, the application range of the numerical control machine tool is expanded, the positioning times of part installation are reduced, the machining precision is improved, and the productivity is obviously improved.

In order to keep the excellent characteristics of high rotating speed, high precision and low noise of the electric spindle, a water cooling method is often adopted for cooling, and as the water cooling method adopts a water circulation continuous cooling method for heat exchange, the heat exchange is most direct and effective, and the defects are that water must be changed frequently, the maintenance is enhanced, and the monitoring is kept; in the past, aiming at an electric spindle product with 1 ten thousand revolutions per minute, a water cooling method generally has poor cooling effect on a super-high-speed special electric spindle with the rotating speed of tens of thousands of revolutions per minute or even hundreds of thousands of revolutions per minute, so that an electric spindle device with a reinforced water cooling structure has become an urgent important trend.

The traditional Chinese patent with publication number CN209970265U discloses an external lathe electric spindle water-cooling heat insulation device, which comprises a water-cooling disc end cover 1 and a water channel 6, wherein the water channel 6 is arranged in the water-cooling disc end cover 1, the water-cooling disc end cover 1 is provided with a water pipe connector 2, the water pipe connector 2 is communicated with the water channel 6, and the water pipe connector 2 is communicated with an external cooling liquid circulation device. By integrating the water cooling structure of the electric spindle and the front end cover, the heat dissipation of the electric spindle is partially solved under the condition that the axial size of the electric spindle is not increased, the spindle box is smoothly isolated, and the bearing of a rear bearing of the spindle is effectively reduced.

The above prior art solution has the following drawbacks: although the problem of not increasing the axial size of the electric spindle and effectively isolating the heat dissipation of the spindle box is solved, the scheme still lacks an effective and reliable reinforced water cooling structure so as to comprehensively ensure the safety, reliability, durability and high efficiency of cooling the electric spindle when the ultra-high speed operation is required.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electric main shaft device who possesses intensive water-cooling structure satisfies the correspondence and satisfies under the hypervelocity running load that electric main shaft reliably cools down quick refrigerated problem to be aided with the refrigerated important replenishment of atmoseal, thereby make the electric main shaft device cooling function who possesses intensive water-cooling structure can promote comprehensively and fully perfect.

In order to solve the above technical problem, the utility model provides an electric spindle unit who possesses intensive water-cooling structure, include: the water cooling device comprises a mandrel, a rotor, a stator, a shaft body and a reinforcing assembly, wherein the mandrel, the rotor, the stator, the shaft body and the reinforcing assembly are coaxially arranged from inside to outside in sequence, and the reinforcing assembly comprises a front bearing seat and a positioning block which are respectively arranged on the front side and the rear side of the rotor and a plurality of longitudinal water cooling channels which are arranged on the inner wall of the shaft body;

the front end of the front bearing seat and the rear end of the positioning block are respectively provided with a front end cover and a rear end cover in a joint mode, and front bearings are arranged at the front end and the rear end of the front bearing seat;

the front ends of the positioning blocks are provided with rear bearings in parallel;

the front end of the rear bearing is elastically abutted with a pre-tightening elastic body;

the outer side of the rear end of the front end cover is abutted to the front bearing outer rail on the front side;

a spacer bush is arranged between the front bearing and the rear bearing;

the water-cooling flow channel is used for integrally cooling the cavity of the electric spindle device body.

Furthermore, the strengthening component also comprises a draw knife rod which is used for connecting an external cutter and a concave oil seal which is arranged at the front end of the front end cover in a concave manner, wherein the draw knife rod is coaxially arranged in the core shaft.

Furthermore, the strengthening component further comprises a sealing end cover connected with the front end cover and the shaft body, and a locking nut is arranged on the front side of the sealing end cover.

Furthermore, the strengthening component also comprises a cylinder movably connected with the rear end of the broach rod;

the top end of the cylinder is abutted against the tail end of the broach rod through counter bore fitting; the rear end of the cylinder is connected with a cascade driving piece in an abutting mode;

the cascade driving piece comprises a front-stage cylinder seat, a middle-stage cylinder seat and a rear-stage cylinder seat which are sequentially cascaded.

Furthermore, the reinforcing assembly also comprises an air cooling cavity coaxially arranged outside the front bearing seat;

the air cooling cavity is attached to the front end of the shaft body;

the air cooling cavity is axially provided with a forward cooling pipe;

the forward cooling pipe is axially connected with a backward cooling pipe through an arc-shaped pipe;

the backward cooling pipe is used for communicating the cascade driver.

Furthermore, the strengthening component also comprises an air nozzle arranged on the outer inclined surface of the air cooling cavity;

the gas nozzle is used for cooling the end face of the sealing end cover.

Further, the water-cooling runner pipe is connected with an external water pump, and the air cylinder, the cascade driving piece, the air-cooling cavity and the air nozzle are all connected with an external air pump or an external air compressor through pipes.

The utility model has the advantages that:

1. the rear bearing is pre-tightened in advance by additionally arranging a pre-tightening elastic body to abut against an outer gear of the rear bearing, the pre-tightening has the functions of improving precision, enhancing rigidity, reducing noise and reducing loss, the front bearing and the rear bearing are made of high-rigidity damping materials, the stability and the rigidity are improved, the positioning block can support the rear bearing on the end face, and the front bearing spacer sleeve enhances the axial supporting force of the front end; the rear end of the shaft body plays a role in supporting a rear bearing seat, the form and position accuracy and stability are better, the rear bearing is assembled to enable the rear end to be axially stable, the sealing end cover and the locking nut maintain the stability and the airtightness of the front end, the front bearing and the front end cover and the rear bearing and the rear end cover are stably and reliably connected, and a stable and low-noise structure is comprehensively ensured; the end face of the front end cover is additionally provided with a concave oil seal, the surface of the concave oil seal is paved with a medium for adsorbing impurities, and the sealing medium is placed for a long time through a tortuous gap and is difficult to overflow so as to achieve the effect of sealing and leakage resistance; the front-stage cylinder seat, the middle-stage cylinder seat and the rear-stage cylinder seat which are combined in a cascade mode push the cylinder to axially pull the broach rod, buffer resetting is quickly released, the top end of the cylinder is abutted to the tail end of the broach rod through counter bore fitting so that the axial direction is stable, and radial runout of the electric main shaft is reduced; the water-cooling runner is integrally circulated for water cooling, a backward cooling pipe, an arc-shaped pipe and a forward through channel from back to front are formed from the back to the front to the whole of the air-cooling cavity, the air-sealing cooling of the front end face of the electric spindle is completed by the air nozzle as the reinforced supplement of the water-cooling device of the cavity of the electric spindle, the cooling effect of cooling is integrally enhanced, and the requirements of stability, durability, safety and reliability of the electric spindle device with the reinforced water-cooling structure are met.

2. The cooling device with uniform heat dissipation is integrally planned, centralized treatment is uniformly achieved, and therefore the effects of stability, reliability, safety and convenience of the electric spindle device with the reinforced water cooling structure are comprehensively achieved.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view of an electric spindle device having a reinforced water cooling structure according to the present invention;

FIG. 2 is an enlarged view at A in FIG. 1;

fig. 3 is an enlarged view at B in fig. 1.

In the figure:

1. a mandrel;

2. a rotor;

3. a stator;

4. a shaft body;

5. a reinforcing component; 51. a front bearing seat; 511. a front end cover; 512. a front bearing; 513. a spacer bush; 52. Positioning blocks; 521. a rear end cap; 522. a rear bearing; 523. pre-tightening the elastic body; 53. a water-cooling flow channel; 54. Pulling a cutter rod; 541. a cylinder; 55. a concave oil seal; 56. sealing the end cap; 561. locking the nut; 57. A cascade drive; 571. a preceding stage cylinder block; 572. a middle-stage cylinder block; 573. a rear stage cylinder block; 58. an air-cooled cavity; 581. a forward cooling tube; 582. a backward cooling pipe; 59. and (4) an air nozzle.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention are described below clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example (b):

as shown in fig. 1 to 3, the electric spindle device with the reinforced water cooling structure of the present invention includes: the water cooling device comprises a mandrel 1, a rotor 2, a stator 3, a shaft body 4 and a strengthening component 5 which are coaxially arranged from inside to outside in sequence, wherein the strengthening component 5 comprises a front bearing seat 51 and a positioning block 52 which are respectively arranged on the front side and the rear side of the rotor 2, and a plurality of longitudinal water cooling runners 53 arranged on the inner wall of the shaft body 4; the front end of the front bearing seat 51 and the rear end of the positioning block 52 are respectively provided with a front end cover 511 and a rear end cover 521 in a joint manner, the front end and the rear end of the front bearing seat 51 are provided with a front bearing 512, the front end of the positioning block 52 is provided with rear bearings 522 side by side, and the front end and the rear bearings 522 are elastically abutted with a pre-tightening elastic body 523; the outer side of the rear end of the front end cover 511 is abutted against the outer rail of the front side front bearing 512, a spacer 513 is arranged between the front side front bearing 512 and the rear side front bearing 512, and the water cooling runner 53 is used for integrally cooling the cavity of the electric main shaft device body. The strengthening component 5 also comprises a broach rod 54 for connecting external cutters and a concave oil seal 55 arranged at the front end of the front end cover 511 in a concave manner, which are coaxially arranged in the mandrel 1. The reinforcing assembly 5 further comprises a sealing cover 56 connected with the front cover 511 and the shaft body 4, and a locking nut 561 is arranged on the front side of the sealing cover 56. The strengthening component 5 also comprises a cylinder 541 which is movably connected with the rear end of the broach rod 54; the top end of the cylinder 541 is abutted against the tail end of the broach rod 54 through counter bore fitting, the rear end of the cylinder 541 is abutted with a cascade driving piece 57, and the cascade driving piece 57 comprises a front-stage cylinder seat 571, a middle-stage cylinder seat 572 and a rear-stage cylinder seat 573 which are sequentially cascaded. Reinforce subassembly 5 and still include the air cooling cavity 58 that the outer coaxial of front bearing seat 51 was equipped with, air cooling cavity 58 laminating axis body 4 front end, and forward cooling tube 581 has been seted up to air cooling cavity 58 axial, and forward cooling tube 581 has backward cooling tube 582 through the arc pipe axial connection, and backward cooling tube 582 is used for the intercommunication to cascade driving piece 57. The reinforcing assembly 5 further comprises an air nozzle 59 arranged on the outer inclined surface of the air cooling cavity 58, and the air nozzle 59 is used for cooling the end surface of the sealing end cover 56.

It is apparent that the elastomer 523, the water-cooled runner 53, the broach rod 54, the oil seal 55, the cylinder 541 and the cascade drive 57 are verified, and the water source in the water-cooled runner 53 is often attended to, carefully monitored and maintained. The method is suggested but not limited to adding a pre-tightening elastic body 523 to abut against an outer gear of a rear bearing 522 for pre-tightening, the pre-tightening has the functions of improving precision, enhancing rigidity and reducing noise and loss, a front bearing 512 and the rear bearing 522 are made of high-rigidity damping-enhancing materials to improve stability and enhance rigidity, a front-end axial supporting force is enhanced by a front-end spacer 513 of the front bearing 512, the rear bearing 522 is installed to enable the rear end of the electric spindle to be axially stable, a sealing end cover 56 and a locking nut 561 maintain the front end of the electric spindle to be stable, and the front bearing 512, the front end cover 511, the rear bearing 522 and the rear end cover 521 are reliably connected to maintain stability and low noise; the cutting fluid lubricates and cools the easily-mixed impurities, the concave oil seal 55 absorbs the impurities on the surface, and the sealing medium is placed in the bent gap for a long time and is difficult to overflow to achieve the sealing and leakage-resisting effect; including but not limited to a fore cylinder block 571, a middle cylinder block 572 and a rear cylinder block 573, the cylinder 541 draws the rod 54 to stretch, and the cylinder 541 abuts against the tail end of the rod 54 to reduce radial run-out; the water-cooling flow channel 53 is wholly cooled circularly, the backward cooling pipe 582, the arc-shaped pipe, the forward cooling pipe 581 to the air-cooling cavity 58 are penetrated through and cooled by air to form the water-cooling strengthening supplement of the electric spindle cavity, and the air nozzle 59 can be cooled in an air sealing manner, so that the requirements of stability, durability, safety and reliability of the electric spindle device with the strengthening water-cooling structure are met.

As shown in fig. 1 to 3, the utility model discloses an electric spindle device with enhanced water cooling structure, water-cooling runner 53 pipe connection have a peripheral hardware water pump, and cylinder 541, air-cooling cavity 58 and air nozzle 59 all pipe connection have a peripheral hardware air pump or a peripheral hardware air compressor.

More definitely, through add peripheral hardware water pump, air pump or the even radiating cooling device of air compressor machine overall planning, reach the comprehensive stable and safe convenient target that just possesses the electricity main shaft device who strengthens the water-cooling structure.

In summary, in this embodiment, the pre-tightening elastic body 523 abuts against the rear bearing 522 for pre-tightening, the positioning block 52 can support the rear bearing 522, the front bearing 512 and the rear bearing 522 are made of high-rigidity damping-enhancing materials to enhance rigidity, reduce noise, reduce damage and improve stability, the spacer 513 between the front bearings 512 enhances the axial supporting force at the front end, the rear bearing 522 is installed to make the rear end of the electric spindle axially stable, the sealing end cover 56 and the locking nut 561 maintain the front end of the electric spindle stable, and the front bearing 512, the front end cover 511, the rear bearing 522 and the rear end cover 521 are reliably connected to maintain stability and low noise; the surface of the concave-shaped oil seal 55 is coated with a lubricating film to adsorb impurities, and a sealing medium is placed in a zigzag gap for a long time and is difficult to overflow to achieve the sealing and leakage-resisting effects; the cascade driving piece 57 pulls the cylinder 541 to stretch the broach rod 54, and the top end of the cylinder 541 is attached to and abutted against the tail end of the broach rod 54 to reduce radial run-out; the water-cooling flow channel 53 is wholly cooled circularly, the backward cooling pipe 582, the arc-shaped pipe, the forward cooling pipe 581 and the air cooling cavity 58 penetrate through the air cooling, and the air nozzle 59 can be cooled in an air sealing manner, so that the electric spindle device with the strengthened water-cooling structure is comprehensively stable, safe and convenient.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or relationships based on the orientations or relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (7)

1. An electric spindle device having a reinforced water cooling structure, comprising: the water cooling device comprises a mandrel (1), a rotor (2), a stator (3), a shaft body (4) and a strengthening component (5), wherein the mandrel (1), the rotor (2), the stator (3), the shaft body (4) and the strengthening component (5) are coaxially arranged from inside to outside in sequence, and the strengthening component (5) comprises a front bearing seat (51) and a positioning block (52) which are respectively arranged on the front side and the rear side of the rotor (2) and a plurality of longitudinal water cooling runners (53) which are arranged on the inner wall of the shaft body (4);

the front end of the front bearing seat (51) and the rear end of the positioning block (52) are respectively provided with a front end cover (511) and a rear end cover (521) in a joint mode, and the front end and the rear end of the front bearing seat (51) are provided with front bearings (512);

the front ends of the positioning blocks (52) are provided with rear bearings (522) side by side;

the front end of the rear bearing (522) is elastically abutted with a pre-tightening elastic body (523);

the outer side of the rear end of the front end cover (511) is abutted against the outer gear of the front bearing (512);

a spacer bush (513) is arranged between the front bearing (512) at the front side and the rear side;

the water-cooling flow passage (53) is used for integrally cooling the cavity of the electric spindle device body.

2. The electric spindle device with the reinforced water cooling structure is characterized in that the reinforced assembly (5) further comprises a broach rod (54) for connecting an external cutter and a concave oil seal (55) which is arranged at the front end of the front end cover (511) in a concave manner, wherein the broach rod and the concave oil seal are coaxially arranged in the mandrel (1).

3. The electric spindle device with the reinforced water cooling structure as claimed in claim 2, wherein the reinforced assembly (5) further comprises a sealing end cover (56) connected to the front end cover (511) and the shaft body (4), and a locking nut (561) is arranged on the front side of the sealing end cover (56).

4. The electric spindle device with the reinforced water cooling structure is characterized in that the reinforced assembly (5) further comprises a cylinder (541) movably connected with the rear end of the draw bar (54);

the top end of the air cylinder (541) is abutted against the tail end of the broaching rod (54) through a counter bore; the rear end of the cylinder (541) is connected with a cascade driving piece (57) in an abutting mode;

the cascade drive (57) comprises a front stage cylinder block (571), a middle stage cylinder block (572) and a rear stage cylinder block (573) which are cascaded in sequence.

5. The electric spindle device with the reinforced water cooling structure as claimed in claim 4, wherein the reinforced assembly (5) further comprises an air cooling cavity (58) coaxially arranged outside the front bearing seat (51);

the air cooling cavity (58) is attached to the front end of the shaft body (4);

a forward cooling pipe (581) is axially arranged on the air cooling cavity (58);

the forward cooling pipe (581) is axially connected with a backward cooling pipe (582) through an arc pipe;

the rearward cooling tubes (582) are for communicating with the cascade drive (57).

6. The electric spindle device with the strengthened water cooling structure according to claim 5, wherein the strengthening assembly (5) further comprises an air nozzle (59) disposed at an outer slope of the air cooling cavity (58);

the air nozzle (59) is used for cooling the end face of the sealing end cover (56).

7. The electric spindle device with the reinforced water cooling structure according to claim 6, wherein the water cooling runner (53) is connected with an external water pump through a pipe, and the air cylinder (541), the cascade driving member (57), the air cooling cavity (58) and the air nozzle (59) are connected with an external air pump or an external air compressor through pipes.

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