CN207563749U - A kind of high speed polishes pneumatic tool changing electrical spindle - Google Patents

Abstract

The utility model discloses a high-speed polishing pneumatic tool-changing electric spindle, which comprises: a machine casing, a front cover installed on the front end of the machine casing, a dust cover, an end cover installed on the rear end of the machine casing, and an end cover installed on the casing. The rotary drive assembly in the body, the bearing assembly at both ends of the rotary drive assembly, the tool handle connected to the rotary drive assembly, the pull claw that fixes the tool handle on the rotary drive assembly, the cylinder assembly that is connected to the rotary drive assembly and realizes tool change, The connecting body is connected between the rotary drive assembly and the cylinder assembly and is arranged at the rear end of the end cover. The utility model provides a high-speed polishing pneumatic tool-changing electric spindle, which has the effects of frequency conversion speed regulation, motor vector, pneumatic tool changing, and high-speed transmission control.

Description

A High Speed Grinding Pneumatic Tool Changing Electric Spindle

technical field

The utility model relates to an electric spindle, in particular to a high-speed polishing pneumatic tool-changing electric spindle, which belongs to the technical field of electromechanical engineering.

Background technique

The high-speed electric spindle is a mechatronic power component that integrates the spindle motor to achieve high speed, high precision, high efficiency and other functions. It is mainly used in high-speed processing machine tools to realize high-speed processing of various materials and improve processing efficiency. .

At present, with the continuous development and improvement of the electric spindle technology, the electric spindle is selected by more and more industries. The market needs a kind of main shaft that combines technologies such as frequency conversion speed regulation, motor vector, pneumatic tool change, high-speed transmission control, etc., and the utility model solves such problems.

Utility model content

In order to solve the deficiencies of the existing technology, the purpose of this utility model is to provide a high-speed polishing pneumatic tool-changing electric spindle, which has the effects of frequency conversion speed regulation, motor vector, pneumatic tool changing, and high-speed transmission control.

In order to achieve the above object, the utility model adopts the following technical solutions:

A high-speed polishing pneumatic tool-changing electric spindle, comprising: a machine housing, a front cover installed at the front end of the machine housing, a dust cover, an end cover installed at the rear end of the machine housing, and a rotary drive assembly installed in the machine housing , the bearing assembly located at both ends of the rotary drive assembly, connected to the handle of the rotary drive assembly, the pull claw that fixes the handle on the rotary drive assembly, connected to the cylinder assembly of the rotary drive assembly and realizes tool change, connected to the rotary drive assembly The connecting body between the cylinder assembly and the rear end of the end cover.

The aforementioned high-speed polishing pneumatic tool-changing electric spindle, the rotating drive assembly consists of: a rotating shaft installed in the machine housing and fixed with a pull claw, a push rod installed in the rotating shaft and driven by a cylinder assembly, fixed on the push rod The pressing sleeve on the rod, the spring element arranged between the rotating shaft and the push rod, is connected to the pre-tightening mechanism of the rotating shaft.

The aforementioned high-speed grinding pneumatic tool change electric spindle, the bearing assembly consists of: a front bearing installed at the front end of the rotating shaft, a rear bearing installed at the rear end of the rotating shaft, a front spacer assembly separating the front bearings, and a locking front bearing The seal cover separates the rear spacer assembly of the rear bearing, and the joint cap that fixes the rear bearing on the rotating shaft.

The aforementioned high-speed polishing pneumatic tool-changing electric spindle, the cylinder assembly consists of: the front piston arranged behind the connecting body, the front cylinder body connected to the front piston, the return spring arranged in the front cylinder body, and the front piston The rear rear piston is connected to the rear cylinder block of the rear piston, and is fixed on the rear cover behind the rear cylinder block.

The aforementioned high-speed polishing pneumatic tool-changing electric spindle has two sets of rear cylinder blocks and two sets of rear pistons.

For the aforementioned high-speed polishing pneumatic tool-changing electric spindle, the rear cover is provided with an air inlet port T0 for unloading the knife, and the connecting body is provided with a piston reset air inlet T1; Air return pipeline; the air intake pipeline is formed by connecting the air intake interface T0 of the unloading knife to the rear end of the rear piston and the rear end of the front piston; the return air pipeline is formed by connecting the front end of the front piston to the air inlet T0 of the unloading knife; The air inlet T0 communicates with the rear part of the air intake pipeline, and the piston reset air inlet T1 communicates with the front part of the air intake pipeline.

The aforementioned high-speed polishing pneumatic tool-changing electric spindle has an air seal inlet AS formed on the rear cover; the above air seal inlet AS, front cylinder block, rear cylinder block, machine housing, end cover, front end gland, dustproof The cover is connected to form an air seal pipeline; the air seal pipeline generates slightly positive pressure air in the dust cover, and the slightly positive pressure air flows out from the gap between the dust cover and the rotor shaft to form an air film around the shaft end of the spindle.

The aforementioned high-speed polishing pneumatic tool-changing electric spindle also includes: a cooling device; The coolant flow channel formed by the connection between the front cylinder block, the rear cylinder block, the connecting body, the casing and the end cover is filled with the coolant in the coolant flow channel.

The aforementioned high-speed polishing pneumatic tool-changing electric spindle has a dust removal air inlet port CL formed on the rear cover; after the front piston moves forward, the dust removal air inlet port CL, front cylinder block, rear cylinder block, push rod, and pull claw They are connected to form a clean compressed air channel.

The aforementioned high-speed polishing pneumatic tool-changing electric spindle also includes: a sensor disposed in the connecting body, and a controller connected to the sensor and the cylinder assembly.

The utility model is beneficial in that: the utility model provides a high-speed polishing pneumatic tool-changing electric spindle, the overall design and structure of the spindle is compact, the overall structure of the spindle is optimized, the volume of the spindle is reduced, and the maintenance is convenient. The bearing assembly is a DT structure, which not only improves the precision and speed of the electric spindle, but also effectively reduces the damage to the bearing when the tool change mechanism is working, and improves the service life of the electric spindle. The rear end of the spindle is equipped with an automatic tool change mechanism, which is easy to operate. The main shaft adopts copper rotor instead of aluminum rotor structure, which has higher overall efficiency and smaller temperature rise. The main shaft is equipped with a cooling device, which can discharge the heat in the main shaft in time and improve the service life. The main shaft is equipped with an air film to achieve the effect of non-contact sealing. The spindle is equipped with a clean compressed air channel to clean the inner cone surface of the spindle and the cone surface of the tool holder, protect the cleanliness of the cone surface, and ensure the precision of the spindle.

Description of drawings

Fig. 1 is the structural representation of a kind of embodiment before tool change of the utility model;

Fig. 2 is a structural representation of an embodiment of the utility model back cover;

Fig. 3 is a schematic structural view of an embodiment of the utility model after a tool change;

Meanings of reference signs in the figure:

1 handle, 2 dust cover, 3 sealing cover, 4 front gland, 5 front bearing, 6 front spacer group, 7 rotating shaft, 8 pulling claw, 9 stator wire package, 10 rotor, 11 disc spring, 12 motor Housing, 13 Push rod, 14 Preload mechanism, 15 Rear bearing, 16 Rear spacer assembly, 17 End cover, 18 Sensor, 19 Connecting body, 20 Return spring, 21 Front cylinder block, 22 Front piston, 23 Rear cylinder body, 24 rear pistons, 25 rear covers.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is made concrete introduction.

A high-speed polishing pneumatic tool-changing electric spindle, comprising: a machine casing 12, a front cover installed on the front end of the machine casing 12, a dust cover 2, an end cover 17 installed on the rear end of the machine casing 12, and installed on the casing The rotary drive assembly in the body 12, the bearing assembly located at both ends of the rotary drive assembly, is connected to the knife handle 1 of the rotary drive assembly, and the pull claw 8 that fixes the knife handle 1 on the rotary drive assembly is connected to the rotary drive assembly and realizes replacement. The cylinder assembly of the knife is connected between the rotary drive assembly and the cylinder assembly and is arranged on the connecting body 19 at the rear end of the end cover 17 . As an embodiment, the knife handle 1 is an ISO knife handle 1 , and the pull claw 8 is an ISO pull claw 8 . As a preference, the rotor 10 is a copper rotor 10, and the main shaft adopts the structure of the copper rotor 10 instead of the aluminum rotor 10, so that the overall efficiency is higher and the temperature rise is smaller.

The rotary drive assembly consists of: a rotating shaft 7 installed in the machine housing 12 and fixed with a pull claw 8, a push rod 13 arranged in the rotating shaft 7 and driven by the cylinder assembly, a pressure sleeve fixed on the push rod 13, The spring element disposed between the rotating shaft 7 and the push rod 13 is connected to the pre-tensioning mechanism 14 of the rotating shaft 7 . As a preference, the spring element is a Belleville spring.

The bearing assembly consists of: a front bearing 5 installed at the front end of the rotating shaft 7, a rear bearing 15 installed at the rear end of the rotating shaft 7, 6 front spacer ring groups separating the front bearing 5, a sealing cover 3 for locking the front bearing 5, and a separating The rear spacer assembly 16 of the rear bearing 15 is a cap that fixes the rear bearing 15 on the rotating shaft 7 . The ISO handle 1 is installed in the taper hole at the front end of the rotating shaft 7 and fixed by the ISO pull claw 8 inside the rotating shaft 7 . The high-frequency three-phase power output by the rotary drive assembly supplies power to the electric spindle through the built-in motor leads (U, V, W), and drives the spindle to run at high speed. The maximum speed that can run depends on the front bearing 5, the rear bearing 15, and the rotating shaft 7 , the maximum rotational speed of the shaft system composed of the preload mechanism 14 . In the utility model, through optimizing the design of the structure of the main shaft, the main shaft has achieved a stable working speed of 40,000rpm with high torque at low speed and 40,000rpm at high speed.

The cylinder assembly consists of: a front piston 22 arranged behind the connecting body 19, a front cylinder body 21 connected to the front piston 22, a return spring 20 arranged in the front cylinder body 21, and a rear piston 24 arranged behind the front piston 22. , the rear cylinder block 23 that is connected to the rear piston 24 is fixed on the rear cover 25 behind the rear cylinder block 23 . The cylinder assembly is a two-way cylinder, the rear cylinder body 23 has two groups, and the rear piston 24 has two groups. The rear cover 25 is provided with an unloading air inlet port T0, and the connecting body 19 is provided with a piston reset air inlet T1; the front cylinder block 21 and the rear cylinder block 23 are provided with an air intake pipeline and a return air pipeline; The knife inlet port T0 is formed through the rear end of the rear piston 24 and the rear end of the front piston 22; the air return pipeline is formed by connecting the front end of the front piston 22 to the knife removal air inlet T0; the knife removal air inlet T0 is connected with the The rear part of the intake pipeline is communicated, and the piston reset intake port T1 is communicated with the front part of the intake pipeline.

The operation process of tool change is: inject 0.6MPa compressed air into the knife unloading air inlet T0 to push the front piston 22 forward, so that the disc spring 11 is compressed, and the pull claw 8 moves forward and opens by itself for tool change, as shown in the figure As shown in 3, after replacing the new tool set, the controller controls the tool unloading air inlet TO to release the pressure, and at the same time injects 0.6MPa compressed air into the piston reset air inlet T1, so that the front piston 22 moves away from the tool handle 1 , thereby driving the disc spring 11 to reset and the claw 8 to clamp the tool, and return to the state shown in Figure 1 to realize tool change.

An air seal inlet AS is formed on the rear cover 25; the air seal inlet AS, the front cylinder block 21, the rear cylinder block 23, the machine housing 12, the end cover 17, the front end gland, and the dust cover 2 are connected to form an air seal pipeline. ; The gas seal pipeline generates slightly positive pressure air in the dust cover 2, and the slightly positive pressure air flows out from the gap between the dust cover 2 and the shaft of the rotor 10, forming an air film around the shaft end of the main shaft. The air film prevents external moisture and impurities from entering the main shaft to achieve the effect of non-contact sealing; it changes the defect that the high-speed rotating body cannot be used for contact sealing.

In order to make the spindle have good thermal stability and ensure the uninterrupted processing, the electric spindle is equipped with a cooling device; the cooling device consists of: the cooling liquid inlet WI, the cooling liquid outlet WO, and the cooling liquid inlet arranged on the rear cover 25 WI, coolant outlet WO communicates with the front cylinder block 21, the rear cylinder block 23, the connecting body 19, the machine housing 12, and the end cover 17 to form a coolant flow channel, which is filled with coolant in the coolant flow channel. The cooling liquid enters the cooling liquid flow channel through the cooling liquid inlet WI, cools the stator wire package 9, the front bearing 5, and the rear bearing 15, and finally discharges from the cooling liquid outlet WO to complete the heat exchange cycle. This design ensures the thermal stability of the spindle, greatly improves the machining accuracy, and at the same time maintains the smooth flow of the cooling water channel and the cooling effect, which greatly prolongs the life of the electric spindle. As an example, the coolant is water or low viscosity oil.

The dust removal air inlet port CL is formed on the rear cover 25; after the front piston 22 moves forward, the dust removal air inlet port CL, the front cylinder block 21, the rear cylinder block 23, the push rod 13, and the pull claw 8 are connected to form clean compressed air. aisle. When unloading the tool, the compressed air will pass through the clean compressed air channel, and finally blow to the conical surface of the front end of the spindle, so as to clean the inner conical surface of the spindle and ISO tool holder 1 conical surface, protect the cleanliness of the conical surface, and ensure the accuracy of the spindle .

The electric spindle also includes: a sensor 18 disposed in the connecting body 19, connected to the sensor 18 and the controller of the cylinder assembly. The signal fed back by the sensor 18 component is sent to the external controller, so that the controller can obtain the accurate position state of the tool, and realize the automatic tool change controlled by the machine tool system. Formed on the rear cover 25 are: the outlet SE of the sensor 18 and the three-phase power interface P.

The utility model provides a high-speed polishing pneumatic tool-changing electric spindle. The overall design and structure of the spindle is compact, the overall structure of the spindle is optimized, the volume of the spindle is reduced, and the maintenance is convenient. The bearing assembly is a DT structure, which not only improves the precision and speed of the electric spindle, but also effectively reduces the damage to the bearing when the tool change mechanism is working, and improves the service life of the electric spindle. The rear end of the spindle is equipped with an automatic tool change mechanism, which is easy to operate. The main shaft adopts copper rotor 10 instead of aluminum rotor 10 structure, the overall efficiency is higher and the temperature rise is smaller. The main shaft is equipped with a cooling device, which can discharge the heat in the main shaft in time and improve the service life. The main shaft is equipped with an air film to achieve the effect of non-contact sealing. The spindle is equipped with a clean compressed air channel to clean the inner cone surface of the spindle and the cone surface of the tool holder 1, protect the cleanliness of the cone surface, and ensure the precision of the spindle.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the above-mentioned embodiments do not limit the utility model in any form, and all technical solutions obtained by means of equivalent replacement or equivalent transformation all fall within the protection scope of the utility model.

Claims (8)

1. a kind of high speed polishes pneumatic tool changing electrical spindle, which is characterized in that including：Casing body is installed on said machine casing body front end Protecgulum, dust cover, be installed on the end cap of machine housing rear end, the rotary drive assembly being installed in said machine casing body, set on upper The bearing assembly at rotary drive assembly both ends is stated, is connected to the handle of a knife of above-mentioned rotary drive assembly, fixed above-mentioned handle of a knife is in rotation Pulling claw on drive component is connected to above-mentioned rotary drive assembly and realizes the cylinder assembly of tool changing, is connected to above-mentioned rotation and drives Dynamic connector between component and cylinder assembly and set on end cap rear end；Above-mentioned rotary drive assembly composition has：It is installed on casing Rotary shaft that is internal and being fixed with pulling claw, the push rod driven in rotary shaft and by cylinder assembly, the pressure being fixed on push rod It covers, the spring part between rotary shaft and push rod, is connected to the pre-tightening mechanism of above-mentioned rotary shaft；Above-mentioned bearing assembly composition Have：The fore bearing of above-mentioned rotary shaft front end is installed on, the rear bearing of above-mentioned rotation shaft rear end is installed on, separates above-mentioned fore bearing Preceding spacer assemblies, lock the sealing cover of above-mentioned fore bearing, separate it is above-mentioned after bearing rear spacer assemblies, it is fixed it is above-mentioned after bearing in Spelling cap in rotary shaft.

2. a kind of high speed according to claim 1 polishes pneumatic tool changing electrical spindle, which is characterized in that above-mentioned cylinder assembly group Cheng You：Secondary piston after connector is connected to the front cylinder block of above-mentioned secondary piston, the return in above-mentioned front cylinder block Spring, the rear piston after above-mentioned secondary piston, be connected to it is above-mentioned after piston rear cylinder, after being fixed on above-mentioned rear cylinder Rear cover.

3. a kind of high speed according to claim 2 polishes pneumatic tool changing electrical spindle, which is characterized in that above-mentioned rear cylinder tool There are two groups, above-mentioned rear piston has two groups.

4. a kind of high speed according to claim 2 polishes pneumatic tool changing electrical spindle, which is characterized in that covers and is equipped with after above-mentioned Knife intake interface T0 is unloaded, connector is equipped with piston reset air inlet T1；Be equipped in front cylinder block, rear cylinder air inlet pipeline with Return line；Above-mentioned air inlet pipeline penetrates through rear end shape to the rear end of rear piston and secondary piston by unloading knife intake interface T0 Into；Above-mentioned return line is penetrated by the front end of secondary piston unloads knife air inlet T0 and is formed；It is above-mentioned to unload knife air inlet T0 and air inlet The rear portion connection of pipeline, above-mentioned piston reset air inlet T1 are connected with the forepart of air inlet pipeline.

5. a kind of high speed according to claim 2 polishes pneumatic tool changing electrical spindle, which is characterized in that covers to be formed after above-mentioned There is sealing gland entrance AS；Above-mentioned sealing gland entrance AS, front cylinder block, rear cylinder, casing body, end cap, front end gland, dust cover connection Form sealing gland pipeline；Above-mentioned sealing gland pipeline generates micro-positive pressure air in dust cover, and above-mentioned micro-positive pressure air is from dust cover with turning Gap outflow between sub- axis, forms air film around main-axis end.

6. a kind of high speed according to claim 2 polishes pneumatic tool changing electrical spindle, which is characterized in that further includes：Cooling dress It puts；Above-mentioned cooling device composition has：Cooling liquid inlet WI, the cooling liquid outlet WO covered after being set to, above-mentioned cooling liquid inlet The cooling liquid stream of formation is connected between WI, cooling liquid outlet WO and front cylinder block, rear cylinder, connector, casing body, end cap Road, the coolant being filled in above-mentioned cooling liquid flowing channel.

7. a kind of high speed according to claim 2 polishes pneumatic tool changing electrical spindle, which is characterized in that covers to be formed after above-mentioned There is dedusting intake interface CL；After secondary piston Forward, above-mentioned dedusting intake interface CL, front cylinder block, rear cylinder, push rod, drawing Connection forms cleaning compressed air channel between pawl.

8. a kind of high speed according to claim 2 polishes pneumatic tool changing electrical spindle, which is characterized in that further includes：Set on upper The sensor in connector is stated, is connected to the controller of the sensor and cylinder assembly.