阅读说明：本技术 一种自驱动丝杠螺母副 (Self-driven screw nut pair ) 是由 彭子平 于 2020-08-14 设计创作，主要内容包括：本发明涉及一种自驱动丝杠螺母副,用于驱动数控机床滑板的纵向运动,包括基座、与所述滑板固连的螺母座,所述的基座上固定有横贯螺母座中心的丝杆,螺母座内安装有与丝杆螺纹传动的螺母,所述螺母外圈过盈安装有电机转子,螺母座内孔过盈安装有带有感应线圈的电机定子,通电后的感应线圈驱动电机转子转动而同步实现螺母转动。本发明采用在螺母座内设置电机转子、电机定子,依靠通电后电机转子的转动带动螺母转动而实现滑板纵向直线运动,由于无需设置伺服电机驱动,使得传动结构紧凑,安装简单方便,节约成本,也有效地减少了丝杆安装误差,提高了丝杆螺母副的传动精度。(The invention relates to a self-driven lead screw and nut pair which is used for driving a sliding plate of a numerical control machine tool to longitudinally move and comprises a base and a nut seat fixedly connected with the sliding plate, wherein a lead screw which traverses the center of the nut seat is fixed on the base, a nut which is in threaded transmission with the lead screw is installed in the nut seat, a motor rotor is installed on the outer ring of the nut in an interference manner, a motor stator with an induction coil is installed in an inner hole of the nut seat in an interference manner, and the induction coil after being electrified drives the motor rotor to rotate so as to synchronously realize the rotation. The nut seat is internally provided with the motor rotor and the motor stator, the nut is driven to rotate by the rotation of the motor rotor after the power is on, so that the longitudinal linear motion of the sliding plate is realized, and the screw rod nut pair is not required to be driven by a servo motor, so that the screw rod nut pair has a compact transmission structure, is simple and convenient to install, saves the cost, effectively reduces the installation error of the screw rod, and improves the transmission precision of the screw rod nut pair.)

1. The utility model provides a self-driven lead screw nut is vice for the longitudinal motion of drive digit control machine tool slide (14), includes base (1), with nut seat (2) that slide (14) link firmly, characterized by: the nut seat is characterized in that a screw rod (3) penetrating through the center of a nut seat (2) is fixed on the base (1), a nut (4) in threaded transmission with the screw rod (3) is installed in the nut seat (2), a motor rotor (5) is installed on the outer ring of the nut (4) in an interference mode, a motor stator (6) with an induction coil is installed in the inner hole of the nut seat (2) in an interference mode, and the induction coil after being electrified drives the motor rotor (5) to rotate so as to synchronously realize rotation of the nut (4).

2. The self-driving lead screw nut assembly as defined in claim 1 wherein: a pair of supports (7) are fixed on the base (1) at intervals, and two ends of the screw rod (3) are fixed with the supports (7) through positioning pins (8).

3. The self-driving lead screw nut assembly as defined in claim 1 wherein: a front bearing (9) and a rear bearing (10) are respectively arranged between inner holes of nut seats (2) on two sides of a motor stator (6) and an outer ring of a nut (4), a flange cover (11) which is used for pressing the outer ring of the front bearing (9) is fixed on the outer side surface of the nut seat (2) on the side of the front bearing (9), and a locking nut (12) which is tightly pressed on the inner ring of the front bearing (9) is in threaded connection with the front end of the nut (4).

4. The self-driving lead screw nut assembly of claim 3, wherein: an inner spacer sleeve (13) is arranged between the lock nut (12) and the inner ring of the front bearing (9).

Technical Field

The invention relates to the technical field of machine tool machining, in particular to a self-driven lead screw and nut pair for driving a sliding plate of a numerical control machine tool to move longitudinally.

Background

In the field of machining of numerical control machine tools, components such as a sliding plate, a spindle box, a rotary table and the like of a machine tool generally adopt a lead screw and nut pair to realize linear motion. Traditional screw nut pair adopts servo motor directly to link the drive more, and the transmission connecting piece is more, and overall structure is numerous and diverse, and the installation requirement is than higher, exists certain installation error during especially lead screw installation and easily causes the transmission precision not enough, influences the machining precision of digit control machine tool.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the defects in the prior art, the invention provides the self-driven lead screw nut pair which is compact in structure and beneficial to improving the transmission precision.

The technical scheme adopted by the invention for solving the technical problems is as follows: a self-driven lead screw and nut pair is used for driving a slide plate of a numerical control machine tool to longitudinally move and comprises a base and a nut seat fixedly connected with the slide plate, a lead screw traversing the center of the nut seat is fixed on the base, a nut in threaded transmission with the lead screw is installed in the nut seat, a motor rotor is installed on the outer ring of the nut in an interference mode, a motor stator with an induction coil is installed in the inner hole of the nut seat in an interference mode, and the induction coil after being electrified drives the motor rotor to rotate so as to synchronously realize nut rotation.

Preferably, a pair of supports is fixed on the base at a distance, and two ends of the screw rod are fixed with the supports through positioning pins.

Specifically, a front bearing and a rear bearing are respectively arranged between an inner hole of a nut seat and an outer ring of the nut seat which are positioned at two sides of the motor stator, a flange cover which is pressed against the outer ring of the front bearing is fixed on the outer side surface of the nut seat at the side of the front bearing, and the front end of the nut is in threaded connection with a locking nut which is pressed on the inner ring of the front bearing.

Furthermore, an inner spacer sleeve is arranged between the locking nut and the front bearing inner ring.

The invention has the beneficial effects that: the nut seat is internally provided with the motor rotor and the motor stator, the nut is driven to rotate by the rotation of the motor rotor after the power is on, so that the longitudinal linear motion of the sliding plate is realized, and the screw rod nut pair is not required to be driven by a servo motor, so that the screw rod nut pair has a compact transmission structure, is simple and convenient to install, saves the cost, effectively reduces the installation error of the screw rod, and improves the transmission precision of the screw rod nut pair.

Drawings

The invention is further described with reference to the following figures and embodiments.

Fig. 1 is a schematic structural view of the present invention.

In the figure: 1. the novel motor comprises a base, 2 parts of a nut seat, 3 parts of a screw rod, 4 parts of a nut, 5 parts of a motor rotor, 6 parts of a motor stator, 7 parts of a support, 8 parts of a positioning pin, 9 parts of a front bearing, 10 parts of a rear bearing, 11 parts of a flange cover, 12 parts of a locking nut and 13 parts of an inner spacer.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

The self-driven lead screw and nut pair shown in figure 1 is used for driving a sliding plate 14 of a numerical control machine tool to move longitudinally, and comprises a base 1, a nut seat 2 fixedly connected with the sliding plate 14 and a lead screw 3, wherein a pair of supporting seats 7 are fixed on the base 1 at intervals, the lead screw 3 penetrates through the center of the nut seat 2, two ends of the lead screw 3 are fixed with the supporting seats 7 through positioning pins 8, and a nut 4 in threaded transmission with the lead screw 3 is installed in the nut seat 2.

A motor rotor 5, a motor stator 6, a front bearing 9 and a rear bearing 10 are arranged in a cavity formed between the outer ring of the nut 4 and the inner hole of the nut seat 2, wherein the motor stator 6 is installed in interference fit with the inner hole of the nut seat 2, an induction coil is wound on the motor stator 6, and the motor rotor 5 is installed in interference fit with the outer ring of the nut 4 and corresponds to the position of the motor stator 6.

Front bearing 9, rear bearing 10 install respectively between 2 holes of nut seat and the 4 outer lanes of nut of motor stator 6 both sides, 2 rear ends of nut seat have the side opening that the diameter is less than its hole diameter, and 4 rear ends of nut have the step flange, have the clearance between this step flange periphery and the side opening, and rear bearing 10's outer lane pastes tightly the side opening inner wall, rear bearing 10's inner circle pastes tight nut 4's step flange medial surface to realize the location to rear bearing 10.

A flange cover 11 is fixed on the outer side surface of the nut seat 2 on one side of the front bearing 9, an inner convex ring of the flange cover 11 presses the outer ring of the front bearing 9, the front end part of the nut 4 is provided with an external thread and is in threaded connection with a locking nut 12, an inner spacer 13 is arranged between the locking nut 12 and the inner ring of the front bearing 9, and the locking nut 12 pushes the inner spacer 13 to be tightly pressed on the inner ring of the front bearing 9.

When the screw driver is used, the induction coil of the motor stator 6 is electrified, the electrified induction coil drives the motor rotor 5 to rotate, the rotation of the motor rotor 5 drives the nut 4 to synchronously rotate, and the nut 4 longitudinally moves along the axis of the screw rod 3 through the thread transmission with the screw rod 3, so that the sliding plate 14 is driven to linearly move longitudinally along the screw rod.

Because the motor rotor 5 and the motor stator 6 are arranged in the nut seat 2, the nut 4 is driven to rotate by the rotation of the motor rotor 5 after the power is on, and the longitudinal linear motion of the sliding plate 14 is realized, the driving of a servo motor is not needed, the cost is saved, the transmission structure is compact, the installation is simple and convenient, the installation error of the screw rod 3 can be effectively reduced, and the transmission precision of the screw rod nut pair is improved.

In light of the foregoing description of preferred embodiments according to the invention, it is clear that many changes and modifications can be made by the person skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.