CN2634723Y

CN2634723Y - Linear motor

Info

Publication number: CN2634723Y
Application number: CN 03214337
Authority: CN
Inventors: 王秀仁
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-08-15
Filing date: 2003-08-15
Publication date: 2004-08-18
Anticipated expiration: 2013-08-15

Abstract

The utility model relates to a linear motor. Two side areas of a core body of the motor are provided with primary coils through a supporting part; a middle area is provided with a main coil; the primary coils and the main coil are connected through an electrical element which is single-directionally conducted; a larger magnetic field can be produced with the combination of each of the two primary coils of the motor and the main coil and big transmission force can be output and the energy consumption is relatively low; by adopting a rugged structure at two ends, the magnetic conductive ring can prevent the magnetic field from forming a closed circuit, which can further improve the output power of the motor.

Description

Linear motor

Technical field:

The utility model relates to a kind of linear motor, especially is suitable for being had the housing of end cap and the linear motor that structure constituted of core body and power transmission shaft being installed in housing by two ends.

Background technology:

Traditional motor is a kind of device by transformation of electrical energy being become mechanical energy and output rotatablely move, this motor must change its motion mode through intermediate member for the occasion of the linear transmission of needs just can be finished, for this reason, its transmission cost and energy consumption all are increased.

Straight-line motor grows a lot in recent years, and " the pipe type straight line motor " announced as CN2309014Y is exactly a kind of straight-line motor that provides.This kind motor adopts a metal shell and is arranged on interior two-phase winding coil of metal shell and the iron core between the adjacent windings, hollow oral area at iron core is provided with guide rod, two groups of coils adopt the structure of reversal connection, and its output is connected with change over switch with electric capacity respectively.Its objective is and utilize electric capacity to make two groups of coils can produce unidirectional magnetic field.Because two groups of coils are to produce excitation respectively to realize switching energy, so the magnetic field of its generation is less relatively, and then make iron core can not export big driving force, the sole mode of its solution is to increase coil windings, but also takies bigger space simultaneously, and consumes big relatively energy.

In addition, CN2418615Y has also announced a kind of " linear electric motors ", this kind linear electric motors are for guaranteeing to have bigger power output, in housing, be equipped with one be placed in internal permanent magnet ring on the magnetic support, the internal permanent magnet ring is set with the bobbin that the inner with iron core is fixed together outward again, and bobbin is provided with coil, when coil electricity, can produce magnetic field, and then under the effect of electromagnetic force, coil and mandrel be moving linearly synchronously, improves the power output of motor with this.But because this motor adopts coil windings and iron core to produce the structure that is synchronized with the movement, except that its complex structure, itself increases the driven loads of iron core, and energy consumption is bigger.

As seen, linear electric motors are that people thirst for the product that solves always, but owing to are subjected to the restriction of space and power conversion aspect, the linear electric motors that so far also not have discovery to address the above problem simultaneously.

Summary of the invention:

Task of the present utility model provides the linear motor that a kind of utilization can solve the conductings simultaneously of two groups of coils and the mode that produces equidirectional magnetic field the output energy problem.

The linear motor that the utility model proposed, comprise that two ends are equipped with the housing of end cap, be equipped with in this housing two ends or an end extend the power transmission shaft in end cap centre and one be enclosed within on the described power transmission shaft external diameter and two ends be limited at core body on the end cap, two limit portions zone of described core body also is provided with primary coil by strutting piece, its central region is provided with main coil, and the electric parts by unidirectional conducting are connected between primary coil and the main coil.

The electric parts of described unidirectional conducting can be made of diode.

The described strutting piece that is used to twine primary coil can be made of the magnetic guiding loop that the middle part has a recess.This core body is a tubular element, and magnetic guiding loop be can be enclosed within on the core outside diameter and the middle part have the colyliform parts of the radial groove that can be used for installing primary coil, and magnetic guiding loop radially extends in the housing at the end near main coil, and leaves predetermined distance between the other end and housing.

Linear motor that the utility model proposes adopts two magnetic guiding loops that are separately positioned on core body both sides portion zone that primary coil is installed, and adopt the electric parts of unidirectional conducting such as diode to be connected between primary coil and the main coil, make the equidirectional big magnetic field of the common generation of one of them primary coil and main coil, and another primary coil ends, so, the exportable relatively large driving force of this kind linear motor, its energy consumption is also relatively low; In addition, rugged structure is adopted at the two ends of magnetic guiding loop, and it makes magnetic field can not form a closed-loop path, can further improve the power output of motor.

Description of drawings:

Accompanying drawing 1 is the surface structure generalized section of an embodiment of the utility model;

Accompanying drawing 2 is annexation schematic diagrames between the coil windings among Fig. 1.

Embodiment:

Referring to Fig. 1, the linear motor that the utility model proposed, comprise that one is columniform and two ends have end cap (11 substantially, 12) power transmission shaft 2 in end cap 11 and 12 centres is extended at housing 1 and the two ends that are installed in the housing 1, and the magnetic conductive core 3 of be enclosed within power transmission shaft 2 outsides that are made of copper pipe and be arranged on strutting piece 4 and coil windings 5 on the core body 3.

Power transmission shaft 2 under external force can be along the endwisely slipping of core body 3, and its dual tapered is also extended respectively outside end cap 11 and 12.Strutting piece 4 is provided with two altogether, is mounted respectively at the two ends of core body 3, is wound with main coil 51 in the central region of core body 3.

The magnetic guiding loop 42 that strutting piece 4 is had by the middle part on the be enclosed within core body 3 of recess 41 constitutes, and magnetic guiding loop 42 extends in the rim of the mouth 13 of housing 1 inner surface at the end 43 near main coil 51, the other end 44 is shorter, and leaves certain distance with the inner surface of housing 1, to form a flux path.The recess 41 of each magnetic guiding loop 42 is provided with primary coil (52,53).

Referring to Fig. 2, it provides the surface structure of annexation between main coil 51 and the primary coil (52,53).As can be seen from Figure 2, main coil 51 is electrically connected with

primary coil

52 and 53 by diode D1 and D2 respectively, makes

primary coil

52 and 53 can form the magnetic loop of a closure respectively with main coil 51.Promptly when elementary coil 53+A and-during the A conducting, primary coil 53 produces equidirectional magnetic field with main coil 51, and primary coil 52+B and-during the B conducting, primary coil 52 and main coil 51 can produce equidirectional magnetic field.

Claims

1, a kind of linear motor, comprise that two ends are equipped with the housing of end cap, be equipped with in this housing two ends or an end extend the power transmission shaft in end cap centre and one be enclosed within on the described power transmission shaft external diameter and two ends be limited at core body on the end cap, it is characterized in that: two limit portions zone of described core body also is provided with primary coil by strutting piece, its central region is provided with main coil, and the electric parts by unidirectional conducting are connected between primary coil and the main coil.

2, linear motor according to claim 1 is characterized in that: the electric parts of described unidirectional conducting can be made of diode.

3, linear motor according to claim 1 is characterized in that: the described strutting piece that is used to twine primary coil can be made of the magnetic guiding loop that the middle part has a recess.

4, linear motor according to claim 3 is characterized in that: described core body is a tubular element, and magnetic guiding loop be can be enclosed within on the core outside diameter and the middle part have the colyliform parts of the radial groove that can be used for installing primary coil.

5, linear motor according to claim 4 is characterized in that: described magnetic guiding loop radially extends in the housing at the end near main coil, and leaves predetermined distance between the other end and housing.