WO2020061757A1

WO2020061757A1 - Piston-based integrated tubular linear motor

Info

Publication number: WO2020061757A1
Application number: PCT/CN2018/107372
Authority: WO
Inventors: 张婷; 刘伟平; 刘剑
Original assignee: 深圳超磁机器人科技有限公司
Priority date: 2018-09-25
Filing date: 2018-09-25
Publication date: 2020-04-02

Abstract

A piston-based integrated tubular linear motor comprises a cylindrical body (1) and a piston rod (2). A first motor stator (31) is arranged at the periphery of the cylindrical body (1). A linear magnetic pole array (4) consists of N and S poles arranged alternately in an axial direction of the piston rod (2). The linear magnetic pole array (4) drives, under the action of the first motor stator (31), the piston rod (2) to perform a reciprocating movement along an axis of the cylindrical body (1) so as to perform linear driving. In terms of linear driving, since the linear magnetic pole array (4) is inserted into the piston rod (2), the motor of the invention has a small structural size, and confinement of the cylindrical body (1) ensures a highly precise linear movement. Moreover, power of the first motor stator (31) can be precisely controlled, thereby ensuring precise control of a linear driving speed.

Description

Piston integrated tubular linear motor

Technical field

The invention relates to the technical field of mechanical parts, in particular to a piston-integrated tubular linear motor.

Background technique

Linear drives are widely used in machinery production, manufacturing and other industrial fields.

technical problem

At present, the mainstream technology on the market is to use a rotary motor and a screw to complete the linear drive. This structure has large volume and poor accuracy.

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Technical solutions

The technical problem to be solved by the present invention is to provide a piston-integrated tubular linear motor. In terms of completing linear driving, the structure is small in size and the control accuracy is high.

A piston-integrated tubular linear motor includes a piston cylinder and a piston rod;

A first motor stator is provided on the peripheral side of the piston cylinder, and a linear magnetic pole array formed by sequentially superposing N poles, S poles, N poles, and S stages in the high direction of the piston rod;

Under the action of the first motor stator, the linear magnetic pole array drives the piston rod to reciprocate along the axis of the piston cylinder to complete the linear drive.

Preferably, the piston rod includes a piston rod and a piston rod head;

The upper part of the piston rod is open, the inside of the piston rod is hollow, and the bottom of the piston rod is closed;

The linear magnetic pole array is filled in the hollow portion of the piston rod, and the linear magnetic pole array is disposed in the hollow portion of the piston rod;

The piston rod head is provided at an upper end portion of the piston rod.

Preferably, the linear magnetic pole array is plastically sealed inside the piston rod, and the linear magnetic pole array is integrated with the piston rod.

Preferably, it further comprises a magnetic scale and a position sensor, the position sensor is connected to the side of the magnetic scale, and the top of the magnetic scale is connected to the piston rod head;

The position sensor is disposed on one side of the piston cylinder; the position sensor is disposed between the piston cylinder and the magnetic scale.

Preferably, it further comprises a battery and power board, a linear motor driver and a charging interface, and the battery and the power board and the linear motor driver are located outside the lower part of the piston cylinder;

The linear motor driver is electrically connected to the battery and the power board; the linear motor driver is electrically connected to the first motor stator;

The charging interface is set on the battery and power board; the charging interface is electrically connected to the battery and power board.

Preferably, an annular receiving cavity is provided on the outer side of the upper portion of the piston cylinder, and the first motor stator is disposed in the annular receiving cavity.

Preferably, it further includes a second motor stator, the second motor stator is disposed on the peripheral side of the lower portion of the piston cylinder; the linear motor driver is electrically connected to the second motor stator;

At the beginning of pumping, when the liquid in the piston cylinder is empty or in the bottom section, the second motor stator and the first motor stator work at the same time; when the liquid is in the middle section of the piston cylinder, the pumping and draining process, The second motor stator is powered off and the first motor stator is energized to work; when the liquid is drained to the bottom section of the piston cylinder, the second motor stator and the first motor stator are energized to work simultaneously.

Preferably, it further comprises a base. The base is provided at the bottom of the piston cylinder. The base is provided with a first liquid inlet hole, a first liquid outlet hole, and a first pipe interface. The first pipe interface is located in the middle of the bottom wall of the base. A plug is provided at a pipe interface.

Preferably, the base is provided with a rotary electric machine stator, and the second electric machine stator also serves as a rotor of the rotary electric machine, and the base is rotatably connected to the bottom of the piston cylinder;

The bottom of the piston cylinder body is provided with a second liquid inlet hole, a second liquid outlet hole and a second pipe interface;

When the piston cylinder rotates relative to the base, the following four states appear: A. The first liquid inlet is in communication with the second liquid inlet, and the first pipe connection, the first liquid outlet and the second liquid outlet are blocked; B The first liquid outlet is in communication with the second liquid outlet, and the first tube interface, the first liquid inlet and the second liquid inlet are blocked; C. The first tube interface is connected with the outside, the first liquid inlet, the first A liquid inlet hole, a second liquid inlet hole, and a second liquid outlet hole are blocked; D. The first liquid inlet hole, the first liquid outlet hole, the first tube interface, the second liquid inlet hole, and the second liquid outlet The holes were blocked.

Preferably, the piston rod is a housing made of a ferromagnetic material;

The first motor stator is movably disposed in a high direction of the piston cylinder.

Beneficial effect

The beneficial effects of the present invention are: a piston-integrated tubular linear motor comprising a piston cylinder and a piston rod; a first motor stator is provided on the peripheral side of the piston cylinder, and N poles, S poles, A linear magnetic pole array composed of N poles and S stages stacked in turn. Under the action of the first motor stator, the linear magnetic pole array drives the piston rod to reciprocate along the axis of the piston cylinder to complete linear driving. In terms of completing the linear drive, a linear magnetic pole array is embedded inside the piston rod, and the structure is small. Based on the limitation of the piston cylinder, the linear motion has high accuracy. Based on the power of the first motor stator, the speed of the linear drive can be accurately controlled. control.

BRIEF DESCRIPTION OF THE DRAWINGS

The piston-integrated tubular linear motor of the present invention is further described below with reference to the accompanying drawings.

FIG. 1 is an exploded view of a piston-integrated tubular linear motor according to the present invention.

2 is a cross-sectional view of a piston-integrated tubular linear motor according to the present invention.

FIG. 3 is a perspective structural diagram of a piston cylinder of a piston-integrated tubular linear motor according to the present invention.

4 is a sectional view of a piston cylinder of a piston-integrated tubular linear motor according to the present invention.

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In the picture:

1-piston cylinder body; 11-ring receiving cavity; 12-second liquid inlet; 13-second liquid outlet; 14-second pipe interface; 2-piston rod; 21-piston rod; 22-piston rod head ; 31- first motor stator; 32- second motor stator; 4- linear magnetic pole array; 5- magnetic scale; 6-position sensor; 7- battery and power board; 8- linear motor driver; 9- charging interface; 10-base; 101-first liquid inlet; 102-first liquid outlet; 103-first tube interface; 20-plug; 30-rotary motor stator.

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Embodiments of the invention

The technical solutions of the present invention will be further described below with reference to the accompanying drawings 1 to 4 and specific embodiments.

The invention provides a piston-integrated tubular linear motor.

A piston-integrated tubular linear motor includes a piston cylinder 1 and a piston rod 2;

A first motor stator 31 is provided on the peripheral side of the piston cylinder 1, and a linear magnetic pole array 4 composed of N poles, S poles, N poles, and S stages is sequentially stacked in the high direction of the piston rod 2;

Under the action of the first motor stator 31, the linear magnetic pole array 4 drives the piston rod 2 to reciprocate along the axis of the piston cylinder 1.

In terms of completing the linear drive, a linear magnetic pole array 4 is embedded inside the piston rod 2, the structure is small, and based on the limitation of the piston cylinder 1, the linear motion has high accuracy. The power of the first motor stator 31 can be accurately controlled, making the linear drive The speed can be precisely controlled.

In this embodiment, the piston rod 2 includes a piston rod body 21 and a piston rod head 22;

The upper part of the piston rod body 21 is opened, the inside of the piston rod body 21 is hollow, and the bottom of the piston rod body 21 is closed;

The linear magnetic pole array 4 is filled in the hollow portion of the piston rod body 21;

The piston rod head 22 is provided at an upper end portion of the piston rod body 21.

In this embodiment, the linear magnetic pole array 4 is plastically sealed inside the piston rod body 21, and the linear magnetic pole array and the piston rod body 21 are integrated.

In this embodiment, a magnetic scale 5 and a position sensor 6 are further included. The position sensor 6 is connected to the side of the magnetic scale 5, and the top of the magnetic scale 5 is connected to the piston rod head 22;

The position sensor 6 is provided on one side of the piston rod body 21.

This embodiment further includes a battery and power board 7, a linear motor driver 8, and a charging interface 9. The battery and power board 7, the linear motor driver 8 are located outside the lower portion of the piston cylinder 1.

The linear motor driver 8 is electrically connected to the battery and the power board 7; the linear motor driver 8 is electrically connected to the first motor stator 31;

The charging interface 9 is electrically connected to a battery and a power board 7.

In this embodiment, an annular receiving cavity 11 is provided on the outer side of the upper portion of the piston cylinder 1, and the first motor stator 31 is disposed in the annular receiving cavity 11.

In this embodiment, a second motor stator 32 is further included, and the second motor stator 32 is disposed on the peripheral side of the lower portion of the piston cylinder 1; the linear motor driver 8 is electrically connected to the second motor stator 32;

In the initial stage of pumping, when the liquid in the piston cylinder 1 is empty or in the bottom section, the second motor stator 32 and the first motor stator 31 work simultaneously; when the liquid is in the middle section of the piston cylinder 1, the pumping and During the draining process, the second motor stator 32 is powered off and the first motor stator 31 is powered on to work; when the liquid is drained to the bottom of the piston cylinder 1, the second motor stator 32 and the first motor stator 31 are powered on to work at the same time.

In this embodiment, a base 10 is further included. The base 10 is disposed at the bottom of the piston cylinder 1. The base 10 is provided with a first liquid inlet 101, a first liquid outlet 102, and a first pipe interface 103; the first pipe interface 103 is located in the middle of the bottom wall of the base 10, and a plug 20 is provided at the first pipe joint 103.

In this embodiment, the base 10 is provided with a rotary electric machine stator 30, and the second electric machine stator 32 also serves as a rotor of the rotary electric machine, and the base 10 is rotatably connected to the bottom of the piston cylinder 1;

The bottom of the piston cylinder 1 is provided with a second liquid inlet hole 12, a second liquid outlet hole 13, and a second pipe interface 14;

When the piston cylinder 1 rotates relative to the base 10, the following four states appear: A. The first liquid inlet 101 is in communication with the second liquid inlet 12, the first tube interface 103, the first liquid outlet 102, and the second outlet Liquid hole 13 is blocked; B. The first liquid outlet hole 102 is in communication with the second liquid outlet hole 13, the first tube interface 103, the first liquid inlet hole 101 and the second liquid inlet hole 12 are blocked; C. the first tube The interface 103 communicates with the outside, and the first liquid inlet 101, the first liquid outlet 102, the second liquid inlet 12 and the second liquid outlet 13 are all blocked; D. The first liquid inlet 101 and the first liquid outlet The liquid hole 102, the first pipe interface 103, the second liquid inlet hole 12 and the second liquid outlet hole 13 are all blocked.

In this embodiment, the piston rod body 21 is a housing made of a ferromagnetic material;

The first motor stator 31 is movably disposed in a high direction of the piston cylinder 1.

In this embodiment, a rotating electric machine driver is further included. Under the control of the rotating electric machine driver, the rotating electric machine stator 30 drives the second electric machine stator 32 to rotate, thereby realizing the four states of A, B, C, and D described above.

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For those skilled in the art, according to the technical solutions and concepts described above, various other corresponding changes and deformations can be made, and all these changes and deformations should fall within the protection scope of the claims of the present invention.

It should be noted that the above embodiments are only a part of the embodiments of the present invention, but not all the embodiments. The singular forms "first," "second," "an," "" and "the" used in the examples and appended claims are also intended to include the plural forms unless the context clearly indicates otherwise . "First" and "second" are just for convenience of explanation, and do not indicate that there is a sequence.

The present invention is not limited to the above embodiments, and the technical solutions of the foregoing embodiments of the present invention can be cross-combined with each other to form a new technical solution. In addition, any technical solution formed by equivalent replacement falls within the protection scope claimed by the present invention. .

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Claims

A piston-integrated tubular linear motor, characterized in that it includes a piston cylinder (1) and a piston rod (2);

A first motor stator (31) is provided on a peripheral side of the piston cylinder (1), and a linear magnetic pole composed of N poles, S poles, N poles, and S stages is sequentially stacked in a high direction of the piston rod (2). Array (4);

Under the action of the first motor stator (31), the linear magnetic pole array (4) drives the piston rod (2) to reciprocate along the axis of the piston cylinder (1).
The piston-integrated tubular linear motor according to claim 1, wherein the piston rod (2) comprises a piston rod body (21) and a piston rod head (22);

The upper portion of the piston rod body (21) is opened, the inside of the piston rod body (21) is hollow, and the bottom of the piston rod body (21) is closed;

The linear magnetic pole array (4) is disposed at a hollow portion of the piston rod body (21);

The piston rod head (22) is disposed at an upper end portion of the piston rod body (21).
The piston-integrated tubular linear motor according to claim 2, wherein the linear magnetic pole array (4) is plastically sealed inside the piston rod body (21), and the linear magnetic pole array (4) and the piston rod body (21) Integrated settings.
The piston-integrated tubular linear motor according to claim 2, further comprising a magnetic scale (5) and a position sensor (6), wherein the position sensor (6) is connected to the magnetic scale (5). The side, the top of the magnetic scale (5) is connected to the piston rod head (22);

The position sensor (6) is disposed between the piston rod body (21) and the piston cylinder body (1).
The piston-integrated tubular linear motor according to claim 4, further comprising a battery and power board (7), a linear motor driver (8), and a charging interface (9), the battery and power board (7), The linear motor driver (8) is located outside the lower part of the piston cylinder (1);

The linear motor driver (8) is electrically connected to the battery and the power board (7); the linear motor driver (8) is electrically connected to the first motor stator (31);

The charging interface (9) is electrically connected to the battery and the power board (7).
The piston-integrated tubular linear motor according to claim 5, wherein an annular receiving cavity (11) is provided on an outer side of an upper portion of the piston cylinder (1), and the first motor stator (31) is provided at the The annular receiving cavity (11) is described.
The piston-integrated tubular linear motor according to claim 6, further comprising a second motor stator (32), the second motor stator (32) being disposed around a lower portion of the piston cylinder (1). Side; the linear motor driver (8) is electrically connected to the second motor stator (32);

In the initial stage of pumping liquid, when the liquid in the piston cylinder (1) is absent or is located in the bottom section, the second motor stator (32) and the first motor stator (31) work simultaneously; the liquid is located in the In the middle section of the piston cylinder (1), during the pumping and draining process, the second motor stator (32) is powered off, and the first motor stator (31) is energized to work; the liquid is discharged to the piston cylinder ( In the bottom section of 1), the second motor stator (32) and the first motor stator (31) are energized to work at the same time.
The piston-integrated tubular linear motor according to claim 7, further comprising a base (10), the base (10) being disposed on a bottom of the piston cylinder (1), and the base (10) A first liquid inlet hole (101), a first liquid outlet hole (102), and a first pipe interface (103) are provided; the first pipe interface (103) is located in the middle of the bottom wall of the base (10), A plug (20) is provided at the first pipe interface (103).
The piston-integrated tubular linear motor according to claim 8, characterized in that the base (10) is provided with a rotary electric machine stator (30), and the second electric machine stator (32) also serves as a rotor of the rotary electric machine, so The base (10) is rotatably connected to the bottom of the piston cylinder (1);

A second liquid inlet (12), a second liquid outlet (13), and a second pipe interface (14) are provided at the bottom of the piston cylinder (1);

When the piston cylinder (1) rotates relative to the base (10), the following four states appear: A. The first liquid inlet (101) is in communication with the second liquid inlet (12), and the first tube interface (103), the first liquid outlet hole (102) and the second liquid outlet hole (13) are blocked; B. the first liquid outlet hole (102) is in communication with the second liquid outlet hole (13), and the first pipe interface ( 103), the first liquid inlet hole (101) and the second liquid inlet hole (12) are blocked; C. the first pipe interface (103) communicates with the outside, the first liquid inlet hole (101), the first liquid outlet hole (102), the second liquid inlet hole (12) and the second liquid outlet hole (13) are all blocked; D. the first liquid inlet hole (101), the first liquid outlet hole (102), and the first pipe interface; (103), the second liquid inlet hole (12) and the second liquid outlet hole (13) are all blocked.
The piston-integrated tubular linear motor according to claim 1, wherein the piston rod body (21) is a housing made of a ferromagnetic material;

The first motor stator (31) is movably disposed along a high direction of the piston cylinder (1).

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