Rare earth permanent magnet synchronous electric spindle

Abstract

The front end of a motor shell is in rigid sealing connection with the rear end of a transition shell, the front end of the transition shell is in rigid sealing connection with the rear end of a clamping shell, a rear cover is fixedly arranged at the rear end of the motor shell in a sealing mode, and the interior of the rear cover is rotationally connected with the rear end of a motor mandrel through a motor rear bearing. The front end of the motor mandrel penetrates through the interior of the motor shell to be connected with one end of the coupler, the coupler is arranged in a cavity of the transition shell, the other end of the coupler is provided with a front-end mandrel, the front-end mandrel and the clamping shell can rotate relatively, and the front end of the front-end mandrel extends out of the clamping shell to be connected with the spring chuck in a matched mode. A motor rotor assembly and a motor stator assembly are sequentially and coaxially wrapped in the middle of the motor mandrel from inside to outside. According to the utility model, the installation requirement and difficulty are effectively reduced, the temperature of the motor rotor assembly cannot be completely transmitted to the front-end core shaft, the temperature of the front-end core shaft is greatly reduced, the thermal elongation is reduced, and the service life of the front-end core shaft and the motor front bearing is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric main shaft device technical field, concretely relates to a rare earth permanent magnet synchronous electric main shaft. BACKGROUND

[0002] Rare earth permanent magnet synchronous electric main shaft is more and more accepted by customers due to built-in rare earth permanent magnet synchronous motor stator and rotor, high response, high servo, low speed and large torque advantages.But compared with asynchronous motor, the rotor temperature of synchronous motor is higher due to permanent magnet, and the rotor temperature can be radiated to bearing section, which can shorten bearing life, increase main shaft thermal elongation, even if adding output reactor between driver and main shaft can not completely solve the problem, and output reactor does not have a mature design standard, can only be optimized through continuous test modification, causing long production cycle, high cost and other unfavorable factors.

[0003] Therefore, a rare earth permanent magnet synchronous electric main shaft is designed, which is integrally assembled at the factory, and the thermal elongation is reduced, and the service life of the front end spindle and the motor front bearing is prolonged, which becomes the further improvement direction. UTILITY MODEL CONTENTS

[0004] To solve the above technical problems, the utility model provides a rare earth permanent magnet synchronous electric main shaft, which comprises a motor shell, a transition shell, a clamping shell, a motor spindle, a shaft coupling, a front end spindle and a spring chuck, the front end of the motor shell is rigidly and sealingly connected with the rear end of the transition shell, the front end of the transition shell is rigidly and sealingly connected with the rear end of the clamping shell, the rear end of the motor shell is sealingly and fixedly provided with a rear cover, the rear cover is rotationally connected with the rear end of the motor spindle through a motor rear bearing, the front end of the motor spindle penetrates through the inside of the motor shell and is connected with one end of the shaft coupling, the shaft coupling is arranged in the cavity of the transition shell, the other end of the shaft coupling is provided with the front end spindle, the front end spindle and the clamping shell can rotate relative to each other, and the front end of the front end spindle extends out of the clamping shell and is adaptively connected with the spring chuck.

[0005] Preferably, the front part of the motor spindle is sleeved with a motor front bearing, a transition bearing seat is adaptively installed on the outer periphery of the motor front bearing, and the transition bearing seat is rigidly and sealingly connected with the motor shell and the transition shell on both sides.

[0006] Preferably, two oppositely arranged angular contact ball bearings are arranged in the clamping shell, and the angular contact ball bearings are adaptively connected with the front end spindle through locking nuts.

[0007] Preferably, the spring chuck is locked in front end through a balance nut on the front end spindle.

[0008] Preferably, a plurality of observation operation holes are formed in the transition shell.

[0009] Preferably, the front end spindle and the motor spindle are coaxially arranged through a shaft coupling, and a gap is left between the front end spindle and the motor spindle.

[0010] Preferably, the middle part of the motor spindle is coaxially covered from inside to outside with a motor rotor assembly and a motor stator assembly.

[0011] Preferably, an encoder is arranged between the motor rear bearing and the rear cover, and the encoder is sleeved on the end part of the motor spindle.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The utility model discloses a motor spindle is assembled into a whole and can be directly used when leaving factory, and the production cycle is short, and the production cost is lower than the split assembling electric spindle in prior art, and the user does not need to install additionally after purchase, reduces the installation requirement and the difficulty, and the temperature of motor rotor assembly can not be all transmitted to the front end spindle, greatly reduces the temperature of front end spindle, reduces the thermal elongation, prolongs the service life of front end spindle and motor front bearing, and is convenient to install, maintain and maintain. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the sectional view of the utility model.

[0015] Figure 2 It is the whole structure schematic view of the utility model.

[0016] Figure 3 It is the whole structure schematic view of the utility model. Figure 2 It is the partial sectional view of the utility model. DETAILED DESCRIPTION

[0017] The utility model will be further explained in combination with the drawings and specific embodiment.

[0018] As Figures 1 to 3As shown in the description of the utility model, one kind is rare earth permanent magnet synchronous motor spindle, including motor shell 1, transition shell 2, clamping shell 3, motor mandrel 4, coupling 5, front end mandrel 6, spring chuck 7, rear cover 8, motor rear bearing 9, motor front bearing 10, transition bearing seat 11, angular contact ball bearing 13, locking nut 14, balance nut 15, observation operation hole 16, motor rotor assembly 17, motor stator assembly 18, encoder 19 and rear bearing seat 20.

[0019] In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more than two;The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is the orientation or position relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. It is indicated or implied that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the utility model, it is necessary to point out that, unless otherwise specified and limited, the terms "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or electrically connected;It can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0021] As Figures 1 to 3 As shown in the description of the utility model, the front end of the motor shell 1 is rigidly and sealingly connected to the rear end of the transition shell 2, the front end of the transition shell 2 is rigidly and sealingly connected to the rear end of the clamping shell 3, the rear end of the motor shell 1 is sealingly and fixedly provided with the rear cover 8, the rear cover 8 is rotatably connected to the rear end of the motor mandrel 4 through the motor rear bearing 9, the outer periphery of the motor rear bearing 9 is provided with the rear bearing seat 20, the rear bearing seat 20 is sealingly and fixedly connected to the rear cover 8, the motor rear bearing 9 and the rear cover 8 are provided with the encoder 19, and the encoder 19 is sleeved on the end portion of the motor mandrel 4.

[0022] The front end of the motor mandrel 4 penetrates the inside of the motor shell 1 and is connected to one end of the coupling 5, and the motor mandrel 4 is coaxially covered with the motor rotor assembly 17 and the motor stator assembly 18 from inside to outside in the middle portion.

[0023] The coupling 5 is arranged in the cavity of the transition shell 2, the other end of the coupling 5 is provided with the front end mandrel 6, the front end mandrel 6 is rotatable relative to the clamping shell 3, the front end mandrel 6 and the motor mandrel 4 are coaxially arranged through the coupling 5, and a gap is left between the front end mandrel 6 and the motor mandrel 4.

[0024] The front end of the front end spindle 6 protrudes to adaptively connect with the clamping shell 3 and the spring chuck 7, and the spring chuck 7 is locked at the front end of the front end spindle 6 through a balance nut 15. The spring chuck 7 is used for clamping various cutters.

[0025] The motor front bearing 10 is sleeved at the front part of the motor spindle 4, the transition bearing seat 11 is adaptively installed on the outer periphery of the motor front bearing 10, and the transition bearing seat 11 is rigidly and sealingly connected with the motor shell 1 and the transition shell 2 at both sides.

[0026] The clamping shell 3 is internally provided with two oppositely arranged angular contact ball bearings 13, the angular contact ball bearings 13 are adaptively connected with the front end spindle 6 through a locking nut 14, and the two oppositely arranged angular contact ball bearings 13 are used for bearing axial force and radial force generated during machining. The locking nut 14 locks the angular contact ball bearings 13 and can adjust the bearing precision to the best precision, and has a whole machine balance hole of the motor spindle, and these parts are installed in the clamping shell 3 to jointly form a cutter clamping part, which is equivalent to the structure of a mechanical shaft.

[0027] The transition shell 2 is provided with a plurality of observation operation holes 16, and the installation state of the shaft coupling 5 can be observed after being opened.

[0028] The motor shell 1, the transition shell 2, the clamping shell 3 and the transition bearing seat 11 are all connected in a rigid sealing mode, an integrated design of the motor spindle is formed, so that the motor spindle is assembled into a whole body that can be directly used when leaving the factory, the production cycle is short, the production cost is lower than that of the split assembled motor spindle in the prior art, the user does not need to additionally install after purchasing, the installation requirements and difficulty are reduced, the temperature of the motor rotor assembly 17 cannot be completely transmitted to the front end spindle 6, the temperature of the front end spindle 6 is greatly reduced, the thermal elongation is reduced, the service life of the front end spindle 6 and the motor front bearing 10 is prolonged, and installation, maintenance and repair are convenient. The utility model is especially suitable for various motor spindles of gantry, engraving and milling machines and the like which do not change tools frequently and manually change tools.

[0029] The above embodiment is only a preferred embodiment of the utility model, and cannot be used to limit the right range of the utility model, therefore, the modification, equivalent change, improvement and the like made according to the patent range of the utility model still belong to the range covered by the utility model.

Claims

1. A rare earth permanent magnet synchronous motorized spindle, characterized by: The utility model relates to a motor drive spring chuck, including motor casing (1), transition casing (2), clamping casing (3), motor mandrel (4), shaft coupling (5), front end mandrel (6) and spring chuck (7), motor casing (1) front end and transition casing (2) rear end rigid seal connection, transition casing (2) front end and clamping casing (3) rear end rigid seal connection, motor casing (1) rear end seal solid with rear cover (8), the rear cover (8) is in through motor rear bearing (9) with motor mandrel (4) rear end rotatory connection, motor mandrel (4) front end passes through the inside of motor casing (1) with one end of shaft coupling (5) is connected, the shaft coupling (5) is located in the cavity of transition casing (2), the other end of shaft coupling (5) is equipped with front end mandrel (6), front end mandrel (6) with clamping casing (3) can be relatively rotatory, and the front end of front end mandrel (6) is stretched out clamping casing (3) with spring chuck (7) adaptive connection.

2. The rare earth permanent magnet synchronous motorized spindle according to claim 1, characterized in that: The motor mandrel (4) front part is provided with a motor front bearing (10), and the motor front bearing (10) is provided with a transition bearing seat (11) on the outer periphery.

3. The rare earth permanent magnet synchronous motorized spindle according to claim 2, characterized in that: The clamping casing (3) is provided with two oppositely arranged angular contact ball bearings (13), and the angular contact ball bearings (13) are connected with the front end mandrel (6) through locking nuts (14).

4. The rare earth permanent magnet synchronous motorized spindle of claim 2, wherein: The front end mandrel (6) is locked with the spring chuck (7) through a balance nut (15).

5. A rare earth permanent magnet synchronous motorized spindle according to claim 4, characterized in that: The transition casing (2) is provided with a plurality of observation operation holes (16).

6. A rare earth permanent magnet synchronous motorized spindle according to claim 5, characterized in that: The front end mandrel (6) and the motor mandrel (4) are coaxially arranged through the shaft coupling (5), and a gap is left between the front end mandrel (6) and the motor mandrel (4).

7. A rare earth permanent magnet synchronous motorized spindle according to claim 6, characterized in that: The motor mandrel (4) is coaxially covered with a motor rotor assembly (17) and a motor stator assembly (18) from inside to outside.

8. A rare earth permanent magnet synchronous motorized spindle according to claim 7, characterized in that: An encoder (19) is arranged between the motor rear bearing (9) and the rear cover (8), and the encoder (19) is sleeved on the end portion of the motor mandrel (4).

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