CN86100374A

CN86100374A - Micromachine

Info

Publication number: CN86100374A
Application number: CN198686100374A
Authority: CN
Inventors: 星野三千雄
Original assignee: Mabuchi Motor Co Ltd
Current assignee: Mabuchi Motor Co Ltd
Priority date: 1985-02-25
Filing date: 1986-02-15
Publication date: 1986-09-03
Also published as: DE3604583C2; GB2172754B; GB2172754A; HK35791A; JPS61144765U; KR860006860A; KR900003399Y1; DE3604583A1; GB8603517D0

Abstract

One micromachine comprises that a metal shell and is used for engaging with shell the cap of rest machine shaft; Cap insulation ground rest is used for the brushgear to the commutator power supply, and has terminal openings to make to be used for terminals to the brushgear power supply to reach the motor outside to reach outside and connect; One electrically connects the fire extinguishing electric capacity between shell and terminals, and wherein cap has such structure: the lead placement of electric capacity is on the cap face that engages with shell; Any electric capacity lead-in wire is electrically connected with terminals, and another electric capacity lead-in wire is electrically connected with shell when cap engages with shell, so that electric capacity is placed into the motor the inside; On cap, need to provide a lead-in wire approaching channel, so that can hold the electric capacity lead-in wire firmly.

Description

Micromachine

The present invention relates generally to a micromachine, more particularly relate to a kind of micromachine with fire extinguishing (sparkquenching) capacitor between the motor housing that is connected motor side and ground connection, wherein is to arrange like this; Make capacitor easily pack in the motor.

In general, in micromachine, the shell of a shielding construction of use is used as preventing a device of power noise in motor.General know all that also the capacitor that is used to make at the blow-out of the generation between commutator and the brush is connected across between a motor side and the metal-back.Equally also know, a micromachine and an outside capacitor of installing together, wherein, the lead-in wire of electric capacity is by being connected between a motor side and the motor housing in motor outside weldings or spot welding.In the micromachine that has an outside capacitor of installing like this, the capacitor that install this outside stretches out, and prevents the damage of capacitor and fall in processing and assembling, need do special consideration.In addition, the welding of electric capacity lead-in wire and motor housing or spot welding be very bother with poor efficiency.

The present invention will overcome above-mentioned not enough problem.

Main purpose of the present invention provides a micromachine, wherein uses simple method, and the capacitor that will be used to extinguish the spark that produces between commutator and brush is placed in the motor the inside.

Another object of the present invention provides a micromachine, wherein, leaves a lead-in wire approaching channel and hold safely and clamp lead-in wire on a precalculated position of cap.

By below in conjunction with description of drawings, these characteristics of the present invention and other characteristic and advantage will become more obvious.

Fig. 1 is an example of micromachine cap used in the present invention, and Fig. 2 is that an electric capacity is installed on micromachine of the present invention attached helps explanation.

In Fig. 1 and Fig. 2, reference number is respectively 1 expression cap; The brush carrier that 2 expressions are made by electrically non-conductive material (as synthetic resin); 3 is that a metallic plate is made coverboard, and be suitable for brush carrier 2 and and brush carrier 2 constituted cap 1 together; The 4th, brushgear; 5 is brushes; 6 is terminals; 7 is a terminal openings; 8 is the composition surface; 9 is lead-in wire approaching channels; 10 is capacitors; The 11st, the lead-in wire of this electric capacity 10; The 12nd, motor housing; The 13rd, permanent magnet; The 14th, rotor; The 15th, machine shaft; The 16th, commutator.

Cap shown in Figure 1 blocks brushgear 4, and is placed on the motor housing 12, and is in this state: promptly composition surface 8 that forms on brush carrier 2 and motor housing 12 engage.In this state, brush 5 contacts with commutator 16, and machine shaft 15 is by cap 1 rest.Be passed in the terminal openings 7 on the brush carrier 2 with terminals 6 that brushgear 4 in fact intactly forms and reach and carry out the outside outside the motor and be connected.

In the cap that embodies micromachine of the present invention shown in Fig. 1, it is shown in Figure 2 to be used to hold fire extinguishing capacitor 10() the approaching channel 9 of any lead-in wire 11 be positioned at the composition surface 8 and the metal coverboard 3 of brush carrier 2.The degree of depth of lead-in wire approaching channel 9 is suitable for littler than the diameter of lead-in wire.Reach the motor outside together when a lead-in wire 11 of capacitor 10 passes terminal openings 7 and terminals 6, and after another lead-in wire 11 was placed in the lead-in wire approaching channel 9, cap 1 and motor housing 12 engaged.In this case, because the diameter of the mobility ratio lead-in wire 11 of lead-in wire approaching channel 9 is little, thus go between 11 to be lived around dissimulated electricity by the interior of motor housing 12, thus be electrically connected with motor housing 12 firmly.Thereby that will do just is connected the lead-in wire on the terminals 6 11 (as welding) together with terminals 6.When motor down-lead was connected to terminals 6, lead-in wire 11 can be connected to terminals 6.And the unnecessary part of lead-in wire 11 can be removed.

Though in example shown in Figure 1, lead-in wire approaching channel 9 is to form on the composition surface 8 of brush carrier 2 and metal coverboard, only forms lead-in wire approaching channel 9 and also can reach same effect on composition surface 8.

As mentioned above, the present invention with a simple and reliable method so that can be easily fire extinguishing electric capacity be packed in the motor. Because the electric capacity of loading onto so is not exposed to the motor outside, thus make things convenient for the operation of motor, and the efficient of installation electric capacity can get significant improvement in motor.

Claims

1, a micromachine has that the motor housing of a metal and one are used for engaging with this motor housing and the cap of rest machine shaft; Described cap rest brushgear is used under state of insulation, has a terminal openings to engine commutator power supply and this cap, and this terminal openings provides the terminals of power supply to draw the motor outside to described brushgear under the state of electric insulation; And a fire extinguishing capacitor is connected electrically between this motor housing and this terminals, and the present invention is characterized in that described cap has such structure: a lead-in wire of above-mentioned capacitor is placed in a composition surface that is used for the cap that engages with above-mentioned motor housing, and above-mentioned capacitor is placed in the motor the inside with such mode, the any lead-in wire that is above-mentioned capacitor is electrically connected with the described terminals that will stretch out the motor outside, and another lead-in wire of above-mentioned capacitor is not electrically connected with having motor housing when this cap engages this motor housing.

2, according to a micromachine of claim 1, another lead-in wire that it is characterized in that described capacitor is inserted in the lead-in wire approaching channel, this approaching channel is provided on the precalculated position of described cap, forms to have the degree of depth littler than described diameter wire, and then this lead-in wire is held onto by this motor housing.