CN202622342U - Direct-driven cutter head - Google Patents

Abstract

The utility model discloses a direct-driven cutter head which comprises two torque motors with outer rotors, a swing head main shaft sleeve and a stator supporting frame. Stators of the torque motors, stator cooling sleeves and the stator supporting frame are in an integrally embedded structure. The swing head main shaft sleeve are integrated with the rotors of the torque motors so as to avoid the problem of poor rigidity caused by threaded connection and reduce the size of the cutter head at the same time. Moreover, a pneumatic forceps holder band-type brake system of an outrigger shaft type of the swing head main shaft sleeve is used to replace a hydraulic band-type brake mechanism to reduce manufacturing cost and improve responding speed.

Description

A direct drive milling head

technical field

The utility model relates to a milling head, in particular to a direct-drive milling head applied to a five-axis linkage numerical control machine tool.

Background technique

The current direct-drive milling head mostly adopts an external rotor torque motor with a split structure, that is, the torque motor is separated from the pendulum structure of the milling head and connected together by bolts. As shown in Figure 1, a typical split structure torque motor direct drive milling head includes an internal torque motor cooling jacket 4', a swing head spindle sleeve 6' with a cooling jacket installed, and a torque motor stator 3', rotor 2', The holding brake mechanism 1' for braking is located outside the rotor.

At present, enterprises or research institutes at home and abroad, such as Sea-Tek, are developing milling heads driven by external rotor torque motors, but the problem is that split-structure milling heads have poor rigidity, strength, and precision retention due to structural limitations. , the assembly process is also more complicated. In order to obtain greater torque, its structure is also relatively large, so that the volume of the entire actuator is relatively large. In addition, the hydraulic brake mechanism adopted by the split structure milling head is expensive and has a slow response time.

Utility model content

The technical problem solved by the utility model is to provide a direct drive milling head, which solves the problem that the traditional split structure has poor rigidity and low strength, and the volume of the swing head needs to be increased in order to obtain a large torque, which affects the use.

In order to solve the above problems, the utility model provides a direct-drive milling head, which includes two outer rotor torque motors, a swing head spindle sleeve and a stator support frame. The outer rotor torque motor includes a torque motor stator and a torque motor rotor. The outer rotor torque motor also includes a stator cooling jacket attached to the outside of the torque motor stator. The torque motor stator, stator cooling jacket and stator support frame are an integral nested structure, and the swing head main shaft sleeve and the torque motor rotor integrated together.

Preferably, the utility model also has the following characteristics:

The stator cooling jacket is provided with several-shaped circulating cooling grooves.

Preferably, the utility model also has the following characteristics:

The direct drive milling head also includes an overhanging pneumatic jaw brake system located outside the stator cooling jacket and outside the swing head main shaft sleeve.

Preferably, the utility model also has the following characteristics:

The torque motor rotor integrated on the swing head main shaft sleeve is a permanent magnet patch type.

Through the above technical solution, the utility model has an overall nested structure outer rotor torque motor direct drive milling head, because the structure of the rotor and the swing head spindle sleeve is adopted, so it has higher rigidity than the split outer rotor milling head of the prior art. Strength, better precision retention; the structure itself occupies less space, has higher torque than the existing split structure milling head, and has higher mechanical benefits. In addition, this structure adopts pneumatic clamp brake system, which has lower overall system cost, convenient installation, compact design, automatic tightening when power is off, short response time, and clean and environmental protection compared with hydraulic clamp brake system. At the same time, due to the overall nested structure, the extended jaw brake structure saves the space of the hydraulic brake mechanism outside the rotor of the torque motor in the prior art, and the volume of the milling head for the torque motor with the same torque can be smaller. Especially in the machine tool industry, the same performance parameters and small size will have greater advantages. In addition, the permanent magnet patch rotor of the utility model is directly integrated on the swing head spindle sleeve, that is, the torque motor can directly drive the executive parts of the milling head, eliminating the need for intermediate connection links and installation links, and the zero transmission effect is more obvious. High-precision transmission parts and installation adjustment process are required to better ensure the transmission accuracy and mechanism operation reliability.

Description of drawings

Fig. 1 is the structural representation of milling head principle in the prior art;

Fig. 2 is a structural schematic diagram of the direct drive milling head of the present invention;

in:

1'-Outer rotor brake mechanism; 2'-Outer rotor torque motor rotor; 3'-Torque motor stator; 4'-Torque motor cooling jacket; 5'-Cooling groove; 6'-Swing head spindle sleeve;

1-torque motor rotor; 2-torque motor stator; 3-stator cooling jacket; 4-pneumatic clamp brake system; - the overhanging shaft of the oscillating head spindle bush.

Detailed ways

The utility model constructs a direct drive milling head of an outer rotor torque motor with an overall nested structure, which includes an outer rotor torque motor stator located inside and a torque motor rotor located outside the stator and integrated with the swing head main shaft sleeve; it also includes a torque motor rotor located inside The stator support frame, the cooling jacket integrated support mechanism and the additional pneumatic clamp brake system.

Among them, the inside of the cooling jacket is provided with several-shaped circulating cooling grooves. The pneumatic clamping brake system installed on the support mechanism directly holds the extended shaft of the swinging main shaft sleeve.

Referring to Fig. 2, the direct-drive milling head of the outer rotor torque motor with overall nested structure of the present utility model is illustrated, including two outer rotor torque motors, the swing head main shaft sleeve 7 and the stator support frame 6, and the outer rotor torque motor includes a torque motor The stator 1, the rotor 2 of the torque motor and the stator cooling jacket 3 attached to the outside of the stator 1 of the torque motor, the stator 1 of the torque motor, the stator cooling jacket 3 and the stator support frame 6 are an integral nested structure.

The stator cooling jacket 3 is provided with a zigzag-shaped circulating cooling groove 5 for efficient cooling of the torque motor coils, and the stator cooling jacket 3 with the zigzag-shaped circulating cooling groove 5 is directly attached to the stator coil to ensure a large torque. The inner wall of the swing head main shaft sleeve 7 is a permanent magnet patch type torque motor rotor 1, which is located on the outer ring of the torque motor stator 2 coil, forming an integral nested outer rotor torque motor direct drive structure. In addition, since the stator 2 of the torque motor, the stator support frame 6 and the stator cooling jacket 3 adopt an integral structure, space is saved, and the diameter of the inner hole of the stator 2 of the torque motor is relatively large, and the pneumatic mechanism for locking the swing assembly of the main shaft can be conveniently designed. Clamp brake system4. The pneumatic pincer brake system 4 installed on the support mechanism can directly hold the overhanging shaft 8 of the swing main shaft sleeve.

To sum up, in the present utility model, the main shaft sleeve of the swing head is integrated with the rotor of the torque motor, so as to avoid the problem of poor rigidity caused by the screw connection, and also reduce the volume of the milling head. In addition, the hydraulic brake mechanism is replaced by a pneumatic pincer brake system with a swing head main shaft sleeve and an externally extending shaft, which reduces manufacturing costs and improves response speed.

Claims (4)

1. one kind is directly driven milling head; Comprise two outer rotor torque motor, yaw collar bush and stator support frame; Said outer rotor torque motor comprises torque motor stator, torque motor rotor, it is characterized in that, said outer rotor torque motor also comprises the stator coolant jacket that is attached to said torque motor stator outside; Said torque motor stator, stator coolant jacket and stator support frame are whole nesting type structure, and said yaw collar bush and torque motor rotor integrate.

2. the milling head that directly drives as claimed in claim 1 is characterized in that, said stator coolant jacket is provided with a few font circulation cooling baths.

3. the milling head that directly drives as claimed in claim 1 is characterized in that, the said milling head that directly drives also includes and is positioned at the said stator coolant jacket outside, is positioned at the pneumatic clamp band-type brake system of the overhanging formula in the said yaw collar bush outside.

4. like any described milling head that directly drives in the claim 1～3, it is characterized in that the said torque motor rotor that is integrated on the said yaw collar bush is that permanent magnet is SMD.

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