Oil-free reciprocating linear motor controlled by magnetic confinement

Abstract

The utility model discloses an oil-free reciprocating linear motor controlled by magnetic confinement. The oil-free reciprocating linear motor comprises return iron, a pair of outer confinement magnetic rings forming an outer magnetic field, a central magnetic rod, a pair of inner confinement magnetic rings, a motion output piston and a retaining spring, the pair of outer constraint outer magnetic rings is coaxially arranged in the magnetic inner cavity and can realize a uniform one-way magnetic field in the magnetic inner cavity; the central magnetic rod is arranged in and coaxial with a pair of outer constraint outer magnetic rings, a pair of inner constraint outer magnetic rings is fixedly sleeved on the central magnetic rod, a kinematic pair is formed between the inner constraint outer magnetic rings and the outer constraint outer magnetic rings, and the central magnetic rod is driven by a magnetic field to do reciprocating motion; the motion output piston is slidably arranged in the piston hole, one end of the motion output piston is fixedly connected with one end of the center magnetic rod, and the retaining spring acts on the other end of the center magnetic rod. According to the utility model, long-stroke non-lubrication linear driving reciprocating motion can be realized; the oil-free linear servo motor can be widely applied to oil-free linear servo motors, and provides a basis for oil-free automatic control.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil -free reciprocating linear motor technical field, especially in a kind of magnetic restraint control's oil -free reciprocating linear motor. BACKGROUND

[0002] Conventional oil -free linear drive relies on spring system to realize the small friction of friction pair, or low friction. The defects of using spring system are: first, short stroke; Because long stroke is prone to support spring fracture, therefore, the stroke of this system is within 20mm;Second, low frequency of use; Because of the limitation of spring mechanical property, if long stroke is realized, the system operating frequency is reduced. INVENTION CONTENTS

[0003] The utility model needs to solve the technical problem in view of the short stroke and low frequency of use of conventional oil -free linear drive relying on spring system to realize the small friction of friction pair, or low friction, and provide a long stroke, high frequency of use's magnetic restraint control's oil -free reciprocating linear motor.

[0004] The technical problem needed by the utility model can be realized by the following technical scheme:

[0005] A kind of magnetic restraint control's oil -free reciprocating linear motor, comprising:

[0006] Return iron, magnetic inner cavity and piston hole are coaxially arranged in the return iron;

[0007] A pair of outer constraint magnetic rings forming outer magnetic field, a pair of outer constraint outer magnetic rings are coaxially installed in the magnetic inner cavity and can realize uniform one-way magnetic field in magnetic inner cavity;

[0008] A center magnetic pole is arranged in a pair of outer constraint outer magnetic rings, the center magnetic pole is coaxial with a pair of outer constraint outer magnetic rings, a pair of inner constraint magnetic rings are sleeved on the center magnetic pole, and one inner constraint magnetic ring and one outer constraint outer magnetic ring form a movement pair;A pair of outer constraint magnetic rings drive the center magnetic pole to reciprocate by a pair of inner constraint magnetic rings using magnetic field;

[0009] A movement output piston, the movement output piston is slidably arranged in the piston hole, one end of the movement output piston is fixedly connected with one end of the center magnetic pole, and the other end of the movement output piston is provided with output head;

[0010] A retaining spring, the retaining spring acts on the other end of the center magnetic pole.

[0011] In one preferred embodiment of the utility model, the magnetism of a pair of outer constraint magnetic rings is opposite;The inner constraint magnetic ring and the outer constraint magnetic ring that form a movement pair are opposite in magnetism.

[0012] In one preferred embodiment of the utility model, the inner constraint magnetic ring and the outer constraint magnetic ring that constitute a pair of movement vice do not contact or contact little during the movement.

[0013] In one preferred embodiment of the utility model, the movement output piston and the piston hole do not contact or contact little during the movement.

[0014] In one preferred embodiment of the utility model, the axial direction of a pair of outer constraint magnetic rings is provided with at least one magnetic isolation ring; the axial direction of an outer constraint magnetic ring is provided with a magnetic isolation ring between the step surface of the return iron, and the step surface is located at the connecting position of the magnetic inner cavity and the piston hole.

[0015] In one preferred embodiment of the utility model, the center magnetic rod is a hollow structure.

[0016] Due to the above technical scheme, the outer constraint magnetic ring utilizes the magnetic concentration structure to realize the uniform unidirectional magnetic field in the magnetic inner cavity; the inner constraint magnetic ring utilizes the magnetic concentration structure to realize the uniform unidirectional magnetic field; the center magnetic rod is utilized to construct a magnetic loop; the principle of repulsion between the inner and outer magnetic circuits is utilized to realize the friction pair of the movement shaft, and the friction pair does not contact or contacts little during the movement, thereby realizing the east oil-free lubrication movement.

[0017] The utility model can realize the long-stroke oil-free linear driving reciprocating movement, can be widely applied to the oil-free linear servo motor, and provides the basis for oil-free automatic control. ACCURACY OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the oil-free reciprocating linear motor of the magnetic constraint control of the utility model. CONCRETE IMPLEMENTING METHOD

[0019] The utility model will be further described below in combination with the drawings and the concrete implementing method.

[0020] Referring to Figure 1 , it is an oil-free reciprocating linear motor of the magnetic constraint control shown in the drawing, which comprises a return iron 100, a pair of outer constraint magnetic rings 210, 220 that form an outer magnetic field, a center magnetic rod 300, a pair of inner constraint magnetic rings 410, 420, a movement output piston 500 and a retaining spring 600.

[0021] The return iron 100 is coaxially provided with a magnetic inner cavity 110 and a piston hole 120; a pair of outer constraint magnetic rings 210, 220 are coaxially installed in the magnetic inner cavity 110 and can realize the uniform unidirectional magnetic field in the magnetic inner cavity; the magnetism of a pair of outer constraint magnetic rings 210, 220 is opposite, for example, the magnetism of the outer constraint magnetic ring 210 is N, and the magnetism of the outer constraint magnetic ring 220 is S.

[0022] Two magnetic isolation rings 710, 720 (of course, one magnetic isolation ring or more than two magnetic isolation rings) are arranged between the axial directions of the outer constraint magnetic rings 210, 220; a magnetic isolation ring 730 is arranged between the axial direction of the outer constraint magnetic ring 720 and the step surface 130 of the magnetic return 100, and the step surface 130 is located at the connection between the magnetic return 100 and the piston hole 120.

[0023] The central magnetic rod 300 is used to build a magnetic circuit, which is arranged in and coaxial with the pair of outer constraint magnetic rings 210, 220. The central magnetic rod 300 is a hollow structure to further reduce the weight of the central magnetic rod 300.

[0024] A pair of inner constraint magnetic rings 410, 420 are sleeved on the central magnetic rod 300, and the magnetic properties of the pair of inner constraint magnetic rings 410, 420 are opposite, for example, the magnetic property of the inner constraint magnetic ring 410 is S, and the magnetic property of the inner constraint magnetic ring 420 is N. The inner constraint magnetic ring 410 and the outer constraint magnetic ring 210 form a pair of motion pairs, and the inner constraint magnetic ring 420 and the outer constraint magnetic ring 220 form a pair of motion pairs, so that the pair of outer constraint magnetic rings 210, 220 drive the central magnetic rod 300 to reciprocate by using the magnetic field through the pair of inner constraint magnetic rings 410, 420; the inner constraint magnetic rings 410, 420 and the outer constraint magnetic rings 210, 220 forming a pair of motion pairs do not contact or have little contact during the movement.

[0025] The motion output piston 500 is slidably arranged in the piston hole 120, and the motion output piston 500 and the piston hole 120 do not contact or have little contact during the movement. One end of the motion output piston 500 is fixedly connected to one end of the central magnetic rod 300, and the other end of the motion output piston 500 is provided with an output head 510; the retaining spring 600 acts on the other end of the central magnetic rod 300.

Claims

1. A magnetic confinement controlled oil-free reciprocating linear motor, characterized by, The application relates to a magnetic energy conversion device, which comprises the following parts: a return iron, wherein a magnetic inner cavity and a piston hole are coaxially arranged in the return iron; a pair of outer constraint magnetic rings for forming an outer magnetic field, which are coaxially arranged in the magnetic inner cavity and can realize a uniform one-way magnetic field in the magnetic inner cavity; a central magnetic rod arranged in the pair of outer constraint magnetic rings, wherein the central magnetic rod is coaxial with the pair of outer constraint magnetic rings, a pair of inner constraint magnetic rings are sleeved on the central magnetic rod, and one inner constraint magnetic ring and one outer constraint magnetic ring form a motion pair; the pair of outer constraint magnetic rings drive the central magnetic rod to reciprocate through the pair of inner constraint magnetic rings by using a magnetic field; a motion output piston, which is slidably arranged in the piston hole, one end of the motion output piston is fixedly connected with one end of the central magnetic rod, and the other end of the motion output piston is provided with an output head; a retaining spring, which acts on the other end of the central magnetic rod.

2. A magnetic confinement controlled oil-free linear motor according to claim 1, characterized in that, The magnetic properties of the pair of outer constraint magnetic rings are opposite; the magnetic properties of the inner constraint magnetic ring and the outer constraint magnetic ring forming the motion pair are opposite.

3. A magnetic confinement controlled oil-free linear motor according to claim 1, characterized in that, The inner constraint magnetic ring and the outer constraint magnetic ring forming the motion pair do not contact or slightly contact during the motion.

4. A magnetic confinement controlled oil-free linear motor according to claim 1, characterized in that, The motion output piston and the piston hole do not contact or slightly contact during the motion.

5. A magnetic confinement controlled oil-free linear reciprocating motor according to claim 1, characterized in that, At least one magnetic isolation ring is arranged between the axial directions of the pair of outer constraint magnetic rings; a magnetic isolation ring is arranged between the axial direction of one outer constraint magnetic ring and a step surface of the return iron, and the step surface is located at the connection position of the magnetic inner cavity and the piston hole.

6. A magnetic confinement controlled oil-free linear motor according to claim 1, characterized in that, The central magnetic rod is a hollow structure.

Images