CN111687434A

CN111687434A - Oil-gas lubrication electric spindle for five-axis linkage machine tool

Info

Publication number: CN111687434A
Application number: CN202010660824.7A
Authority: CN
Inventors: 农乃昌
Original assignee: Shenzhen ABIG Precision Machinery Co Ltd
Current assignee: Shenzhen ABIG Precision Machinery Co Ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2020-09-22

Abstract

The invention discloses an oil-gas lubrication electric spindle for a five-axis linkage machine tool, which comprises a steel cylinder, a front bearing assembly, a rear bearing assembly, a stator assembly, a rotor, a pull rod and a cutter handle assembly, wherein the front bearing assembly comprises a front bearing seat, a flange plate is formed at the rear end of the front bearing seat, an oil-gas lubrication bearing is arranged in the front bearing seat, a bearing pressing plate is fixed at the front end of the front bearing, the rear end surface of the bearing pressing plate abuts against an outer ring of the oil-gas lubrication bearing, a dust-proof ring is fixed at the front end of the bearing pressing plate, a ring spraying plate is fixed at the front end of the dust-proof ring, a first mounting groove is formed in the front end surface of the flange plate, a vibration sensor is fixed in the first mounting groove, a second mounting groove is formed in the rear end. The invention can collect the displacement of the front end part of the main shaft in time, and simultaneously detect the vibration generated in the processing process of the main shaft, thereby not only being beneficial to improving the processing yield, but also prolonging the service life.

Description

Oil-gas lubrication electric spindle for five-axis linkage machine tool

Technical Field

The invention relates to an electric spindle, in particular to an oil-gas lubrication electric spindle for a five-axis linkage machine tool.

Background

The five-axis numerical control equipment can reduce the use of a clamp in the modernization development process, simultaneously only needs one reference, increases the stability of a product, can meet the high-precision machining requirement, simultaneously, does not need to be provided with a special cutter due to the particularity of five-axis linkage, thereby reducing the cutter cost, and enables a five-axis linkage main shaft and a machine tool to be applied more and more widely based on the advantages.

The main shaft is generally in a large load state in the operation process, the front end of the main shaft is subjected to thermal expansion under the long-term use condition, so that the front end part generates displacement and vibration, if the displacement and the vibration cannot be fed back in time, the reject ratio of a machined part is increased, and meanwhile, the service life is also reduced due to the fact that a cutter is excessively used. Regarding the equipment size aspect, current main shaft receives inner structure influence and the volume is slightly bigger, is difficult to satisfy little space or requires processing occasions such as yaw multi-angle swing, leads to the application range of main shaft to be restricted. In addition, since the bearing is located inside the main shaft, the specific use condition of the bearing cannot be predicted, so that the bearing is worn due to over friction, and the service life of the main shaft is further influenced.

Disclosure of Invention

The invention aims to solve the technical problem that aiming at the defects of the prior art, the oil-gas lubrication electric main shaft which has small volume and high power and can be used for a five-shaft linkage machine tool can acquire the displacement of the front end part of the main shaft in time, detect the vibration generated in the main shaft machining process and detect the temperature rise of the front bearing part of the main shaft in real time, is beneficial to improving the machining yield and can prolong the service life.

In order to solve the technical problems, the invention adopts the following technical scheme.

An oil-gas lubrication electric spindle for a five-axis linkage machine tool comprises a steel cylinder, wherein a front bearing assembly and a rear bearing assembly are respectively arranged at the front end and the rear end of the steel cylinder, a stator assembly is arranged in the steel cylinder, a hollow rotor assembly penetrates through the stator assembly, the rear end of the rotor assembly penetrates through the rear bearing assembly, a pull rod penetrates through the rotor assembly, a tool shank assembly is arranged in an opening at the front end of the rotor assembly, the front end of the pull rod is connected with the tool shank assembly, the front bearing assembly comprises a front bearing seat, a flange plate is formed at the rear end of the front bearing seat and fixedly connected with the front end of the steel cylinder, an oil-gas lubrication bearing is arranged in the front bearing seat, a bearing pressing plate is fixed at the front end of the front bearing, the rear end face of the bearing pressing plate abuts against an outer ring of the oil-gas lubrication bearing, and a, a ring spraying plate is fixed at the front end of the dustproof ring, the front end of the rotor assembly sequentially penetrates through the oil-gas lubrication bearing, the bearing pressing plate, the dustproof ring and the ring spraying plate, a first mounting groove is formed in the front end face of the flange plate, a vibration sensor is fixed in the first mounting groove, a first cover plate covers the outer side of the first mounting groove, the first cover plate is fixedly connected with the front end face of the flange plate, a second mounting groove is formed in the rear end face of the ring spraying plate, a displacement sensor is fixed in the second mounting groove, the sensing end of the displacement sensor faces the dustproof ring, a third mounting groove is formed in the front end face of the flange plate, a temperature sensor jack is formed in the third mounting groove, and a bearing temperature sensor is inserted in the temperature sensor jack; the motor is characterized in that a water-cooling inner sleeve is arranged in the steel cylinder, the rotor assembly comprises a permanent magnet rotor, the stator assembly comprises a coil assembly, the permanent magnet rotor is arranged in the coil assembly, and the coil assembly and the permanent magnet rotor form a built-in motor unit.

Preferably, a hollow hole is formed in the bottom of the second mounting groove, the hollow hole penetrates through the front side and the rear side of the annular spraying plate, a second cover plate is fixed to the front end face of the annular spraying plate, and the second cover plate covers the hollow hole.

Preferably, the rear bearing assembly comprises a rear bearing sleeve, a rear bearing seat is arranged in the rear bearing sleeve, the front end of the rear bearing sleeve is fixedly connected with the rear end of the steel cylinder, a rear oil-gas lubrication bearing is arranged in the rear bearing seat, and the rear end of the rotor assembly penetrates through the rear oil-gas lubrication bearing.

Preferably, a back cover is fixed on the rear bearing seat, and a cylinder assembly for applying thrust to the pull rod is fixed at the rear end of the back cover.

Preferably, an oil-gas inlet and an oil-gas outlet are fixed on the back cover, an oil-gas introduction channel and an oil-gas discharge channel which are sequentially communicated are formed in the back cover, the rear bearing seat, the steel cylinder and the front bearing seat, the rear end of the oil-gas introduction channel is communicated with the oil-gas inlet, the front end of the oil-gas introduction channel is communicated with an oil inlet of the oil-gas lubrication bearing, the front end of the oil-gas discharge channel is communicated with an oil outlet of the oil-gas lubrication bearing, and the rear end of the oil-gas discharge channel is communicated with the oil-gas outlet.

Preferably, the front end cover of rotor subassembly is equipped with shield and waterproof cover, waterproof cover is located the front side of shield, just shield and waterproof cover all with rotor subassembly fixed connection.

Preferably, the dust-proof ring with be formed with first clearance between the annular spraying plate, the dust-proof cover with be formed with the second clearance between the annular spraying plate, waterproof cover with be formed with the third clearance between the annular spraying plate, back of the body is covered and is fixed with the atmoseal joint, back of the body cover the rear bearing frame, the steel cylinder with set up the atmoseal passageway that communicates in proper order in the front bearing frame, the rear end of atmoseal passageway with the atmoseal joint is linked together, the front end of atmoseal passageway first clearance, the second clearance with the third clearance communicates in proper order, the air current that the atmoseal joint injected passes through in proper order the atmoseal passageway first clearance the second clearance with the third clearance is outwards spout, and then is in form the atmoseal around the waterproof cover.

Preferably, a back cover air hole is formed in the back cover, one end of the back cover air hole is communicated with the air seal channel, and the other end of the back cover air hole is communicated with the inner space of the back cover.

Preferably, the shield with the bearing clamp plate with be formed with the fourth gap between the dust ring, the fourth gap with back gas tank is linked together, before aqua storage tank and back aqua storage tank have been seted up to the lateral wall of shield, the opening of preceding aqua storage tank with the interior anchor ring of dust ring sets up relatively, the opening of back aqua storage tank with the interior anchor ring of bearing clamp plate sets up relatively.

Preferably, a tail cover is fixed to the rear end of the oil cylinder assembly, a rear connecting rod is arranged in the tail cover, the front end of the rear connecting rod is connected with the rear end of the pull rod, an annular flange is formed on the outer side of the rear connecting rod, 3 proximity switches are fixed in the tail cover, sensing ends of the proximity switches face the rear connecting rod, the front and rear positions of the 3 proximity switches are different, and when the electric spindle is in a cutter loosening state, a cutter clamping state and a cutter-free state, the annular flange is aligned with the 3 proximity switches respectively; wear to be equipped with rotary joint in the tail-hood, rotary joint inserts the post including connecting the end cap and connecting, connect and insert the post and vertically locate the center department that connects the end cap, so that rotary joint wholly is "T shape", set up the end cap water inlet that is used for pouring into rivers on connecting the end cap, it inserts the post delivery port to connect to have seted up in the post, insert the post delivery port with the inside cavity of pull rod is linked together.

The invention discloses an oil-gas lubrication electric main shaft for a five-axis linkage machine tool, wherein a vibration sensor is arranged in a first mounting groove at the front end of a flange plate, the vibration sensor can feed back a vibration signal to a controller of the electric main shaft in real time, a displacement sensor is arranged in a second mounting groove at the rear end of a ring spray plate and is used for detecting the distance between the ring spray plate and a dustproof ring, a bearing temperature sensor is arranged in a third mounting groove, and when the vibration amplitude of the electric main shaft and the displacement between the front end parts of the main shaft exceed preset values or the temperature rise of the front bearing and the rear bearing of the main shaft exceeds preset values due to unreasonable use, the controller of the electric main shaft can send an alarm prompt in time. Compared with the prior art, the device can acquire the displacement of the front end part of the main shaft in time, and can detect the vibration generated in the machining process of the main shaft, so that the device is more excellent, the temperature rise of the main shaft before and after detection is implemented, the machining yield is improved, and the loss of a cutter can be reduced. In addition, the coil assembly and the permanent magnet rotor form a high-density built-in motor unit structure, and the high-density built-in motor unit is used as a power core of the main shaft, so that the size of the main shaft is effectively reduced, and the high-density built-in motor unit structure is suitable for occasions with small space or requirements on swinging head multi-angle swinging and the like. In practical application, the invention can also utilize the rotary joint arranged in the tail cover to ensure the accuracy and the effectiveness of central water outlet, and further prolong the service life of the main shaft by arranging a front oil-gas lubrication bearing and a rear oil-gas lubrication bearing, thereby better meeting the application requirements.

Drawings

FIG. 1 is a partial cross-sectional view of an electric spindle;

FIG. 2 is a partial sectional view II of the motorized spindle;

FIG. 3 is an exploded view of the front end structure of the motorized spindle;

FIG. 4 is a structural view of the annular nozzle plate;

FIG. 5 is a block diagram of the front bearing block;

FIG. 6 is a cross-sectional view of a first forward bearing assembly;

FIG. 7 is a cross-sectional view of the front bearing assembly two;

FIG. 8 is a cross-sectional view three of the front bearing assembly;

FIG. 9 is a partial cross-sectional view of the back cover portion;

FIG. 10 is a cross-sectional view four of the front bearing assembly;

FIG. 11 is an enlarged view of portion A of FIG. 10;

FIG. 12 is an exploded view of the tail cap portion;

FIG. 13 is a view showing the structure of an internal motor unit;

FIG. 14 is a block diagram of a rotary joint;

FIG. 15 is an exploded view of the rear bearing assembly;

FIG. 16 is a cross-sectional view of the rear bearing assembly.

Detailed Description

The invention is described in more detail below with reference to the figures and examples.

The embodiment provides an oil-gas lubrication electric spindle for a five-axis linkage machine tool, which is shown in fig. 1 to 16 and comprises a steel cylinder 1, wherein a front bearing assembly 2 and a rear bearing assembly 3 are respectively arranged at the front end and the rear end of the steel cylinder 1, a stator assembly 4 is arranged in the steel cylinder 1, a hollow rotor assembly 5 is arranged in the stator assembly 4 in a penetrating manner, the rear end of the rotor assembly 5 penetrates through the rear bearing assembly 3, a pull rod 6 is arranged in the rotor assembly 5 in a penetrating manner, a cutter handle assembly 7 is arranged in an opening at the front end of the rotor assembly 5, the front end of the pull rod 6 is connected with the cutter handle assembly 7, the front bearing assembly 2 comprises a front bearing seat 20, a flange 21 is formed at the rear end of the front bearing seat 20, the flange 21 is fixedly connected with the front end of the steel cylinder 1, an oil-gas lubrication bearing 22 is arranged in the front bearing seat 20, the rear end face of the bearing pressing plate 23 abuts against the outer ring of the oil-gas lubrication bearing 22, the front end of the bearing pressing plate 23 is fixed with a dust ring 24, the front end of the dust ring 24 is fixed with a ring spray plate 25, the front end of the rotor assembly 5 sequentially passes through the oil-gas lubrication bearing 22, the bearing pressing plate 23, the dust ring 24 and the ring spray plate 25, the front end face of the flange 21 is provided with a first mounting groove 210, a vibration sensor 211 is fixed in the first mounting groove 210, a first cover plate 212 covers the outer side of the first mounting groove 210, the first cover plate 212 is fixedly connected with the front end face of the flange 21, the rear end face of the ring spray plate 25 is provided with a second mounting groove 250, a displacement sensor 251 is fixed in the second mounting groove 250, the sensing end of the displacement sensor 251 faces the dust ring 24, the front end face of the flange 21 is provided with a third mounting groove 213, a temperature sensor jack 214 is arranged in the third mounting groove 213, and a bearing temperature sensor is inserted in the temperature sensor jack 214;

the steel cylinder 1 is internally provided with a water-cooling inner sleeve 118, the rotor assembly 5 comprises a permanent magnet rotor 500, the stator assembly 4 comprises a coil assembly 400, the permanent magnet rotor 500 is arranged in the coil assembly 400, and the coil assembly 400 and the permanent magnet rotor 500 form an embedded motor unit.

In the above structure, the vibration sensor 211 is installed in the first installation groove 210 at the front end of the flange 21, the vibration sensor 211 can feed back a vibration signal to the controller of the electric spindle in real time, and the displacement sensor 251 is installed in the second installation groove 250 at the rear end of the annular spraying plate 25, the displacement sensor 251 is used for detecting the distance between the annular spraying plate 25 and the dust-proof ring 24, and when the vibration amplitude of the electric spindle and the displacement between the front end parts of the spindle exceed preset values, the controller of the electric spindle can send an alarm prompt in time. On the basis, the front end of the main shaft is provided with the bearing temperature sensor, the temperature data fed back by the bearing temperature sensor is utilized, the main shaft controller is favorable for monitoring the temperature condition of the bearing part in real time, and when the temperature of the bearing reaches a preset temperature threshold value, the main shaft controller can send out an alarm prompt in time. In addition, the coil assembly 400 and the permanent magnet rotor 500 are utilized to form a high-density built-in motor unit structure, and the high-density built-in motor unit is used as a power core of the main shaft, so that the size of the main shaft is effectively reduced, and the high-density built-in motor unit is suitable for occasions with small space or requirements on swinging head multi-angle swinging and the like.

Further, a wire passing sleeve 120 for passing through a cable is fixed at the edge of the water-cooled inner sleeve 118.

In practical application, bearing temperature sensors can be arranged on the front bearing part and the rear bearing part of the main shaft respectively, temperature detection can be carried out on the front bearing part and the rear bearing part simultaneously, when temperature data collected by the front bearing temperature sensor and the rear bearing temperature sensor reach a preset temperature threshold value, the main shaft controller can send out an alarm prompt in time, the detection mode can not only detect abnormal states in time, but also avoid reduction of main shaft precision caused by excessive use of the bearings, the performance of the main shaft can be guaranteed, and the service life of the main shaft can be prolonged.

Compared with the prior art, the spindle vibration detection device can timely acquire the displacement and temperature conditions of the front end part of the spindle, and simultaneously detect the vibration generated in the spindle machining process, thereby not only being beneficial to improving the machining yield, but also effectively prolonging the service life of the spindle.

Further, a temperature sensor plug 215 is fixed in the third mounting groove 213, and the temperature sensor plug 215 covers the outer side of the bearing temperature sensor. The temperature sensor plug 215 can protect the bearing temperature sensor and also help to repair the bearing temperature sensor.

In order to facilitate the inspection and maintenance of the displacement sensor 251, in this embodiment, a hollow hole 252 is formed at the bottom of the second mounting groove 250, the hollow hole 252 penetrates through the front side and the rear side of the annular spraying plate 25, a second cover plate 253 is fixed on the front end surface of the annular spraying plate 25, and the second cover plate 253 covers the hollow hole 252.

In practical application, the present invention preferably provides the first cover plate 212, the second cover plate 253 and the temperature sensor plug 215, and the vibration sensor 211, the displacement sensor 251 and the bearing temperature sensor are respectively covered and protected by the first cover plate 212, the second cover plate 253 and the temperature sensor plug 215, and the assembling structure has the characteristic of easy disassembly, which not only facilitates the assembling and the maintenance work, but also facilitates the user to flexibly select the three sensors according to the requirements, i.e., the user can use the three sensors at the same time, and also can flexibly select one or more of the three sensors.

Further, the rear bearing assembly 3 comprises a rear bearing sleeve 30, a rear bearing seat 300 is arranged in the rear bearing sleeve 30, the front end of the rear bearing sleeve 30 is fixedly connected with the rear end of the steel cylinder 1, a rear oil-gas lubrication bearing 31 is arranged in the rear bearing seat 300, and the rear end of the rotor assembly 5 penetrates through the rear oil-gas lubrication bearing 31.

This embodiment is in both ends are equipped with preceding oil-gas lubrication bearing 22 and back oil-gas lubrication bearing 31 respectively around rotor subassembly 5, and then right both ends play the oil-gas lubrication effect respectively around rotor subassembly 5, under the effect of front and back oil-gas lubrication bearing, can not only guarantee the accurate operation of main shaft, can improve the life of main shaft moreover.

Preferably, a back cover 8 is fixed to the rear bearing block 30, and a cylinder assembly 9 for applying a thrust force to the tie bar 6 is fixed to a rear end of the back cover 8.

In this embodiment, an oil-gas lubrication type bearing is adopted at the front end of the main shaft, correspondingly, an oil-gas inlet and an oil-gas outlet are fixed on the back cover 8, the rear bearing seat 30, the steel cylinder 1 and the front bearing seat 20 are internally provided with an oil-gas introduction channel 200 and an oil-gas discharge channel 201 which are sequentially communicated, the rear end of the oil-gas introduction channel 200 is communicated with the oil-gas inlet, the front end of the oil-gas introduction channel 200 is communicated with an oil inlet of the oil-gas lubrication bearing 22, the front end of the oil-gas discharge channel 201 is communicated with an oil outlet of the oil-gas lubrication bearing 22, and the rear end of the oil-gas discharge channel 201 is communicated with the oil-gas outlet.

Compared with the prior art, the oil-gas lubricating oil is used for lubricating the bearing balls, the lubricating oil is injected in a circulating mode, the lubricating oil can be directly conveyed to the sliding surface of the bearing in a proper amount, the best lubricating effect is guaranteed to be achieved at the maximum running speed, friction loss can be effectively reduced, heat can be reduced, and the rotating speed and the service life of the spindle are further improved.

In order to further play cooling effect to the main shaft, this embodiment is right leading bearing subassembly 2 and steel cylinder 1 are cooled down with the water-cooling mode respectively and are handled, for example set up water-cooling endotheca 118 in the steel cylinder 1, steel cylinder water course 119 has been seted up to the lateral wall of water-cooling endotheca 118, steel cylinder 1 cover in steel cylinder water course 119, simultaneously leading bearing frame water course 208 is seted up to the lateral wall of leading bearing frame 20, the outside cover of leading bearing frame 20 is equipped with water-cooling overcoat 209, water-cooling overcoat 209 covers in leading bearing frame water course 208, and the main shaft operation in-process, to inject circulating water flow in steel cylinder water course 119 and the leading bearing frame water course 208, carry out quick water-cooling to main shaft main part and main shaft front end through the water-.

In order to achieve the dustproof and waterproof effect, in this embodiment, the front end of the rotor assembly 5 is sleeved with a dustproof cover 26 and a waterproof cover 27, the waterproof cover 27 is located on the front side of the dustproof cover 26, and both the dustproof cover 26 and the waterproof cover 27 are fixedly connected with the rotor assembly 5.

In order to clean the front end of the spindle during the machining process, in this embodiment, a first gap 240 is formed between the dust-proof ring 24 and the annular nozzle plate 25, a second gap 241 is formed between the dust-proof cover 26 and the annular nozzle plate 25, a third gap 242 is formed between the waterproof cover 27 and the annular nozzle plate 25, an air sealing joint 80 is fixed on the back cover 8, sequentially communicated air sealing channels 243 are formed in the back cover 8, the back bearing seat 30, the steel cylinder 1 and the front bearing seat 20, the rear end of the air sealing channel 243 is communicated with the air sealing joint 80, the front end of the air sealing channel 243, the first gap 240, the second gap 241 and the third gap 242 are sequentially communicated, the air flow injected by the air sealing joint 80 is sequentially ejected outwards through the air sealing channel 243, the first gap 240, the second gap 241 and the third gap 242, thereby forming a gas seal around the waterproof cover 27.

Furthermore, a back cover air hole 81 is formed in the back cover 8, one end of the back cover air hole 81 is communicated with the air seal channel 243, and the other end of the back cover air hole 81 is communicated with the inner space of the back cover 8.

The back cover air hole 81 has the function of supplementing a certain air pressure to the space at the rear end of the main shaft while generating an air seal at the front end, so that the air pressure balance at the front end and the rear end of the main shaft is ensured, the internal stress caused by uneven front and rear pressure is avoided, and the overall performance of the main shaft is improved.

Preferably, a protruding ring 260 is formed on the outer side of the dust cover 26, a front air groove 261 and a rear air groove 262 are formed on the front and rear sides of the protruding ring 260, and the space inside the rear air groove 262 is larger than the space inside the front air groove 261. The two air grooves can play the role of air bags and can be used for containing water drops, dust and the like, so that the pollution to the inside of the main shaft is avoided.

Further, a fourth gap 244 is formed between the dust cover 26 and the bearing pressure plate 23 and between the dust ring 24, the fourth gap 244 is communicated with the rear air groove 262, a front water storage tank 263 and a rear water storage tank 264 are arranged on the outer side wall of the dust cover 26, an opening of the front water storage tank 263 is arranged opposite to the inner annular surface of the dust ring 24, and an opening of the rear water storage tank 264 is arranged opposite to the inner annular surface of the bearing pressure plate 23.

The space in the front water storage tank 263 is greater than the space in the rear water storage tank 264.

The front inner wall of the front water storage tank 263 is inclined obliquely downward to make the section of the front water storage tank 263 trapezoidal, and the front inner wall of the rear water storage tank 264 is inclined obliquely downward to make the section of the rear water storage tank 264 trapezoidal.

The front side inner wall of the water storage tank is inclined, and based on the structural design, a small amount of water drops enter the front water storage tank 263 and the rear water storage tank 264 in the operation process in time, and the water drops are also dispensed out of the spindle under the action of gravity, the guiding action of the inclined inner wall and the centrifugal action, so that the waterproof performance is further improved.

In addition, since the space in the front water storage groove 263 is relatively large, even if a small amount of water drops enter the fourth slit 244, the water drops are also accommodated in the front water storage groove 263, so that the water drops can be prevented from further infiltrating into the rear water storage groove 264, and the waterproof capability can be further improved.

In order to facilitate detection of the states of tool loosening, tool clamping and tool absence, in this embodiment, a tail cover 10 is fixed to the rear end of the cylinder assembly 9, a rear connecting rod 11 is arranged in the tail cover 10, the front end of the rear connecting rod 11 is connected to the rear end of the pull rod 6, an annular flange 110 is formed on the outer side of the rear connecting rod 11, 3 proximity switches 111 are fixed in the tail cover 10, the sensing ends of the proximity switches 111 face the rear connecting rod 11, the front and rear positions of the 3 proximity switches 111 are different, and when the electric spindle is in the states of tool loosening, tool clamping and tool absence, the annular flange 110 is aligned with the 3 proximity switches 111 respectively;

a rotary joint 100 penetrates through the tail cover 10, the rotary joint 100 comprises a joint end cap 101 and a joint inserting column 102, the joint inserting column 102 is vertically arranged at the center of the joint end cap 101, so that the rotary joint 100 is integrally T-shaped, an end cap water inlet 103 used for injecting water flow is formed in the joint end cap 101, an inserting column water outlet 104 is formed in the joint inserting column 102, and the inserting column water outlet 104 is communicated with an inner cavity of the pull rod 6. Based on the above structure, the embedded rotary joint 100 is arranged in the tail cover 10, and under the action of the rotary joint 100, the water outlet state at the front end of the pull rod 6 is favorably and accurately controlled, so that the action accuracy and reliability of the spindle are improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the technical scope of the present invention should be included in the scope of the present invention.

Claims

1. The oil-gas lubrication electric spindle for the five-axis linkage machine tool is characterized by comprising a steel cylinder (1), wherein a front bearing assembly (2) and a rear bearing assembly (3) are respectively arranged at the front end and the rear end of the steel cylinder (1), a stator assembly (4) is arranged in the steel cylinder (1), a hollow rotor assembly (5) is arranged in the stator assembly (4) in a penetrating manner, the rear end of the rotor assembly (5) penetrates through the rear bearing assembly (3), a pull rod (6) is arranged in the rotor assembly (5) in a penetrating manner, a cutter handle assembly (7) is arranged in an opening at the front end of the rotor assembly (5), the front end of the pull rod (6) is connected with the cutter handle assembly (7), the front bearing assembly (2) comprises a front bearing seat (20), a flange plate (21) is formed at the rear end of the front bearing seat (20), and the flange plate (21) is fixedly connected with the front end of the steel, the oil-gas lubrication type oil-gas bearing assembly is characterized in that a front oil-gas lubrication bearing (22) is arranged in the front bearing seat (20), a bearing pressing plate (23) is fixed at the front end of the front bearing (20), the rear end face of the bearing pressing plate (23) abuts against the outer ring of the front oil-gas lubrication bearing (22), a dust ring (24) is fixed at the front end of the bearing pressing plate (23), a ring spraying plate (25) is fixed at the front end of the dust ring (24), the front end of the rotor assembly (5) sequentially penetrates through the front oil-gas lubrication bearing (22), the bearing pressing plate (23), the dust ring (24) and the ring spraying plate (25), a first mounting groove (210) is formed in the front end face of the flange plate (21), a vibration sensor (211) is fixed in the first mounting groove (210), a first cover plate (212) covers the outer side of the first mounting groove (210), and the first cover plate (212) is fixedly connected with the front end, a second mounting groove (250) is formed in the rear end face of the annular spraying plate (25), a displacement sensor (251) is fixed in the second mounting groove (250), the sensing end of the displacement sensor (251) faces the dustproof ring (24), a third mounting groove (213) is formed in the front end face of the flange plate (21), a temperature sensor jack (214) is formed in the third mounting groove (213), and a bearing temperature sensor is inserted in the temperature sensor jack (214);

be equipped with water-cooling endotheca (118) in steel cylinder (1), rotor subassembly (5) are including permanent magnet rotor (500), stator module (4) are including coil pack (400), permanent magnet rotor (500) are located in coil pack (400), and by coil pack (400) with interior concealed motor element is constituteed to permanent magnet rotor (500).

2. The oil-gas lubrication electric spindle for the five-axis linkage machine tool as claimed in claim 1, wherein a hollow hole (252) is formed in the bottom of the second mounting groove (250), the hollow hole (252) penetrates through the front side and the rear side of the annular spraying plate (25), a second cover plate (253) is fixed to the front end face of the annular spraying plate (25), and the second cover plate (253) covers the hollow hole (252).

3. The oil-gas lubrication electric spindle for the five-axis linkage machine tool as claimed in claim 1, wherein the rear bearing assembly (3) comprises a rear bearing sleeve (30), a rear bearing seat (300) is arranged in the rear bearing sleeve (30), the front end of the rear bearing sleeve (30) is fixedly connected with the rear end of the steel cylinder (1), a rear oil-gas lubrication bearing (31) is arranged in the rear bearing seat (300), and the rear end of the rotor assembly (5) penetrates through the rear oil-gas lubrication bearing (31).

4. The oil-air lubricated electric spindle for a five-axis linkage machine tool according to claim 3, wherein a back cover (8) is fixed to the rear bearing block (30), and a cylinder assembly (9) for applying thrust to the tie rod (6) is fixed to the rear end of the back cover (8).

5. The oil-gas lubrication electric spindle for the five-axis linkage machine tool is characterized in that an oil-gas inlet and an oil-gas outlet are fixed on the back cover (8), the rear bearing seat (30), the steel cylinder (1) and the front bearing seat (20) are internally provided with an oil-gas introduction channel (200) and an oil-gas discharge channel (201) which are sequentially communicated, the rear end of the oil-gas introduction channel (200) is communicated with the oil-gas inlet, the front end of the oil-gas introduction channel (200) is communicated with an oil inlet of the front oil-gas lubrication bearing (22), the front end of the oil-gas discharge channel (201) is communicated with an oil outlet of the front oil-gas lubrication bearing (22), and the rear end of the oil-gas discharge channel (201) is communicated with the oil-gas outlet.

6. The oil-gas lubrication electric spindle for the five-axis linkage machine tool is characterized in that a dust cover (26) and a waterproof cover (27) are sleeved at the front end of the rotor assembly (5), the waterproof cover (27) is located on the front side of the dust cover (26), and the dust cover (26) and the waterproof cover (27) are fixedly connected with the rotor assembly (5).

7. The oil-gas lubrication electric spindle for the five-axis linkage machine tool according to claim 6, wherein a first gap (240) is formed between the dust-proof ring (24) and the annular spraying plate (25), a second gap (241) is formed between the dust-proof cover (26) and the annular spraying plate (25), a third gap (242) is formed between the waterproof cover (27) and the annular spraying plate (25), an air sealing joint (80) is fixed on the back cover (8), air sealing channels (243) which are sequentially communicated are formed in the back cover (8), the rear bearing seat (30), the steel cylinder (1) and the front bearing seat (20), the rear ends of the air sealing channels (243) are communicated with the air sealing joint (80), the front ends of the air sealing channels (243), the first gap (240), the second gap (241) and the third gap (242) are sequentially communicated, the air flow injected by the air seal joint (80) is ejected outwards through the air seal channel (243), the first gap (240), the second gap (241) and the third gap (242) in sequence, and further an air seal is formed around the waterproof cover (27).

8. The oil-gas lubrication electric spindle for the five-axis linkage machine tool according to claim 7, characterized in that a back cover air hole (81) is formed in the back cover (8), one end of the back cover air hole (81) is communicated with the air seal channel (243), and the other end of the back cover air hole (81) is communicated with the inner space of the back cover (8).

9. The oil-gas lubrication electric spindle for the five-axis linkage machine tool is characterized in that a fourth gap (244) is formed between the dust cover (26) and the bearing pressing plate (23) and between the dust ring (24), the fourth gap (244) is communicated with the rear gas groove (262), a front water storage groove (263) and a rear water storage groove (264) are formed in the outer side wall of the dust cover (26), the opening of the front water storage groove (263) is opposite to the inner annular surface of the dust ring (24), and the opening of the rear water storage groove (264) is opposite to the inner annular surface of the bearing pressing plate (23).

10. The oil-gas lubrication electric spindle for the five-axis linkage machine tool is characterized in that a tail cover (10) is fixed at the rear end of the oil cylinder assembly (9), a rear connecting rod (11) is arranged in the tail cover (10), the front end of the rear connecting rod (11) is connected with the rear end of the pull rod (6), an annular flange (110) is formed on the outer side of the rear connecting rod (11), 3 proximity switches (111) are fixed in the tail cover (10), the sensing ends of the proximity switches (111) face the rear connecting rod (11), the front positions and the rear positions of the 3 proximity switches (111) are different, and when the electric spindle is in a cutter loosening state, a cutter clamping state and a cutter-free state, the annular flange (110) is respectively aligned with the 3 proximity switches (111);

wear to be equipped with rotary joint (100) in tail-hood (10), rotary joint (100) are including connecting end cap (101) and connecting and insert post (102), connect and insert post (102) vertical locate connect the center department of end cap (101), so that rotary joint (100) wholly is "T shape", offer on connecting end cap (101) and be used for pouring into end cap water inlet (103) of rivers, it has inserted post delivery port (104) to connect to have seted up in inserting post (102), it with the inside cavity of pull rod (6) is linked together to insert post delivery port (104).