CN215221957U

CN215221957U - Windscreen wiper motor filtering shielding structure

Info

Publication number: CN215221957U
Application number: CN202121361403.0U
Authority: CN
Inventors: 李万军; 吴文明
Original assignee: Anhui Shenghuabo Auto Electric Co ltd
Current assignee: Anhui Shenghuabo Auto Electric Co ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2021-12-17
Anticipated expiration: 2031-06-18

Abstract

The utility model discloses a windscreen wiper motor filter shielding structure, including wearing core electric capacity, brush bottom plate and reduction box, its characterized in that, it passes through to wear core electric capacity the pressure equipment of brush bottom plate is in on the reduction box and with the reduction box conductive connection. Alternating current signals generated by the motor are conducted with currents through the step surface on the core-through capacitor and the step surface in the speed reducing box body, the step-shaped structure forms a shielding effect, and alternating current electromagnetic radiation is prevented from leaking to form interference signals. The utility model discloses a special cross core electric capacity and brush bottom plate and reduction box body cooperation installation, the cylinder that the step face in the direct core electric capacity that will wear contacted and utilize the brush bottom plate with the internal step face conductive contact of reducing gear box compresses tightly, and it has cancelled the copper foil, has reduced material cost, also makes the assembly simpler simultaneously.

Description

Windscreen wiper motor filtering shielding structure

Technical Field

The utility model relates to a windscreen wiper motor technical field, in particular to windscreen wiper motor filtering shielding structure.

Background

At present, in the wiper motor, a core-through capacitor is often needed to play a role in filtering. The shielding of the feedthrough capacitor is carried out by a special shielding structure or by a reduction gear box shell made of metal material. At present, a core-through capacitor adopted in a wiper motor is generally cylindrical, a copper foil is coated outside the cylindrical core-through capacitor during assembly and then pressed into a core-through capacitor mounting hole of a reduction box body, the copper foil is tightly matched with the core-through capacitor mounting hole on the reduction box body, and the core-through capacitor is electrically connected with the reduction box body. This method requires an additional copper foil, resulting in increased cost. Meanwhile, the mode is inconvenient to install, automatic production is not easy to realize, and the production cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the material cost that causes to the more copper foil of part that current windscreen wiper motor filter shielding structure exists is high, install inconvenient problem and provide one kind and need not copper foil and simple to operate, can realize automated production's windscreen wiper motor filter shielding structure.

The utility model discloses the technical problem that will solve can realize through following technical scheme:

the utility model provides a windscreen wiper motor filtering shielding structure, includes punch-through electric capacity, brush bottom plate and reduction box, its characterized in that, punch-through electric capacity passes through the brush bottom plate pressure equipment is in on the reduction box and with reduction box conductive connection.

In a preferred embodiment of the present invention, the brush bottom plate is made of plastic, a cylinder is disposed at a position of the brush bottom plate for installing the feedthrough capacitor, and a through hole is formed in the cylinder; the speed reduction box body is made of metal materials, a step hole is formed in the position, used for installing the core-through capacitor, of the speed reduction box body, and the step hole is formed by a small-diameter hole and a large-diameter hole which are coaxial; the outer diameter of a cylinder on the electric brush bottom plate is matched with the inner diameter of a large-diameter hole on the reduction box body; the core-through capacitor comprises a capacitor body, a first conducting wire and a second conducting wire, wherein the first conducting wire and the second conducting wire are positioned at two ends of the capacitor body in the axial direction, the first conducting wire, the capacitor body and the second conducting wire are coaxial, the excircle of the capacitor body is a step-shaped excircle, the step-shaped excircle consists of a large-diameter excircle and a small-diameter excircle, the first conducting wire extends out from the end face of the large-diameter excircle, the second conducting wire extends out from the end face of the small-diameter excircle, and the capacitor body is a non-conducting surface except for a step surface between the large-diameter excircle and the small-diameter excircle; the outer diameter of the first lead is matched with the inner diameter of a through hole in the electric brush bottom plate, the outer diameter of the large-diameter outer circle is matched with the inner diameter of the large-diameter hole, and the outer diameter of the small-diameter outer circle is matched with the inner diameter of the small-diameter hole; during assembly, a first lead on the feedthrough capacitor is inserted into a through hole on the brush bottom plate, then a cylinder of the brush bottom plate and a capacitor body of the feedthrough capacitor are inserted into a step hole on the reduction box body together, wherein the cylinder of the brush bottom plate and a large-diameter excircle on the capacitor body of the feedthrough capacitor are inserted into a large-diameter hole, a small-diameter excircle on the capacitor body of the feedthrough capacitor is inserted into a small-diameter hole, and a step surface between the large-diameter excircle and the small-diameter excircle of the capacitor body is pressed onto a step surface between the large-diameter hole and the small-diameter hole in the step hole through a large-diameter excircle end surface on the capacitor body by an end surface of the cylinder, so that good conductive contact is formed between the two.

In a preferred embodiment of the present invention, the first wire is clearance-fitted to the through hole of the brush base plate.

In a preferred embodiment of the present invention, a clearance fit of 0.1-0.3mm is adopted between the large diameter outer circle on the capacitor body and the large diameter hole on the reduction box body, and a clearance fit of 0.0-0.3mm is adopted between the small diameter outer circle on the capacitor body and the small diameter hole on the reduction box body.

Since the technical scheme as above is used, the utility model discloses a special electric capacity of wearing the core is installed with brush bottom plate and reduction box cooperation, and the cylinder that directly will wear the step face in the electric capacity of wearing the core and the internal step face conductive contact of reduction box and utilize on the brush bottom plate compresses tightly, and it has cancelled the copper foil, has reduced material cost, also makes the assembly simpler simultaneously. Alternating current signals generated by the motor are conducted with currents through the step surface on the core-through capacitor and the step surface in the speed reducing box body, the step-shaped structure forms a shielding effect, and alternating current electromagnetic radiation is prevented from leaking to form interference signals.

Drawings

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

Fig. 2 is a schematic structural diagram of the reduction box of the present invention.

Fig. 3 is a cross-sectional view C-C of fig. 2.

Fig. 4 is an assembly diagram of the brush bottom plate and the feedthrough capacitor according to the present invention.

Fig. 5 is a cross-sectional view E-E of fig. 4.

Fig. 6 is an exploded view of the assembly between the brush bottom plate and the feedthrough capacitor and the reduction box of the present invention.

Fig. 7 is a side view of fig. 6.

Fig. 8 is a sectional view a-a of fig. 7.

Fig. 9 is an assembly diagram of the brush bottom plate, the feedthrough capacitor, and the reduction box of the present invention.

Fig. 10 is a sectional view a-a of fig. 9.

Fig. 11 is an enlarged schematic view of fig. 10 at B.

Detailed Description

The invention is further described below with reference to the accompanying drawings and the detailed description.

The utility model discloses a windscreen wiper motor filtering shielding structure, including wearing core electric capacity 100, brush bottom plate 200 and reduction box 300.

Referring to fig. 1, the feedthrough capacitor 100 includes a capacitor body 110, and a first conductive line 120 and a second conductive line 130 located at two ends of the capacitor body 110 in the axial direction, wherein the first conductive line 120, the capacitor body 110 and the second conductive line 130 are coaxial.

The excircle of the capacitor body 110 is a step-shaped excircle, the step-shaped excircle is composed of a large-diameter excircle 111 and a small-diameter excircle 112, the first conducting wire 120 extends out from the end face 113 of the large-diameter excircle 111, the second conducting wire 130 extends out from the end face 114 of the small-diameter excircle 112, and except for the step face 115 between the large-diameter excircle 111 and the small-diameter excircle 112, the capacitor body 110 is a non-conducting face.

Referring to fig. 2 and 3, the reduction box 300 is made of a metal material, and a stepped hole is formed at a position of the reduction box for mounting the feedthrough capacitor, and the stepped hole is composed of a small diameter hole 310 and a large diameter hole 320, which are coaxial. The outer diameter D1 of the large-diameter outer circle 111 of the feedthrough capacitor 100 matches the inner diameter D2 of the large-diameter hole 320, and the outer diameter D2 of the small-diameter outer circle 112 matches the inner diameter D1 of the small-diameter hole 310.

Referring to fig. 4 and 5, the brush base plate 200 is made of plastic, a cylinder 210 is disposed at a position of the brush base plate 200 for mounting the feedthrough capacitor, and a through hole 220 is formed in the cylinder 210.

The outer diameter of the cylinder 210 on the brush base plate 200 matches the inner diameter of the large-diameter hole 320 on the reduction box 300; the outer diameter of the first wire 120 of the feedthrough capacitor 100 matches the inner diameter of the through-hole 220 in the brush base 200.

Referring to fig. 6 to 11, during assembly, the first conducting wire 120 of the feedthrough capacitor 100 is inserted into the through hole 220 of the brush base plate 200, and the first conducting wire 120 is in clearance fit with the through hole 220 of the brush base plate 200; then, the cylinder 210 of the brush base plate 200 and the capacitor body 110 of the feedthrough capacitor 100 are inserted into a stepped hole on the reduction box 300 together, wherein the cylinder 210 of the brush base plate 200 and the large-diameter outer circle 111 of the capacitor body 110 of the feedthrough capacitor 100 are inserted into the large-diameter hole 320, the small-diameter outer circle 112 of the capacitor body 110 of the feedthrough capacitor 100 is inserted into the small-diameter hole 310, and the end surface of the cylinder 210 presses the stepped surface 115 between the large-diameter outer circle 111 and the small-diameter outer circle 112 of the capacitor body 110 onto the stepped surface 330 between the large-diameter hole 320 and the small-diameter hole 310 in the stepped hole through the end surface 113 of the large-diameter outer circle 111 of the capacitor body 110, so that good conductive contact is formed between the two.

The large diameter excircle 111 on the capacitor body 110 and the large diameter hole 320 on the reduction box body 300 are in clearance fit with 0.1-0.3mm, and the small diameter excircle 112 on the capacitor body 110 and the small diameter hole 310 on the reduction box body 300 are in clearance fit with 0.0-0.3mm, so that the assembly is convenient.

Alternating current signals generated by the motor are conducted with the step surface 330 in the reduction box body 300 through the step surface 115 on the core-through capacitor 100, and the step-shaped structure forms a shielding effect to prevent alternating current electromagnetic radiation from leaking to form interference signals.

Claims

1. The utility model provides a windscreen wiper motor filtering shielding structure, includes punch-through electric capacity, brush bottom plate and reduction box, its characterized in that, punch-through electric capacity passes through the brush bottom plate pressure equipment is in on the reduction box and with reduction box conductive connection.

2. The filter shielding structure of claim 1, wherein the brush base is made of plastic, a cylinder is disposed on the brush base for mounting the feedthrough capacitor, and a through hole is formed in the cylinder; the speed reduction box body is made of metal materials, a step hole is formed in the position, used for installing the core-through capacitor, of the speed reduction box body, and the step hole is formed by a small-diameter hole and a large-diameter hole which are coaxial; the outer diameter of a cylinder on the electric brush bottom plate is matched with the inner diameter of a large-diameter hole on the reduction box body; the core-through capacitor comprises a capacitor body, a first conducting wire and a second conducting wire, wherein the first conducting wire and the second conducting wire are positioned at two ends of the capacitor body in the axial direction, the first conducting wire, the capacitor body and the second conducting wire are coaxial, the excircle of the capacitor body is a step-shaped excircle, the step-shaped excircle consists of a large-diameter excircle and a small-diameter excircle, the first conducting wire extends out from the end face of the large-diameter excircle, the second conducting wire extends out from the end face of the small-diameter excircle, and the capacitor body is a non-conducting surface except for a step surface between the large-diameter excircle and the small-diameter excircle; the outer diameter of the first lead is matched with the inner diameter of a through hole in the electric brush bottom plate, the outer diameter of the large-diameter outer circle is matched with the inner diameter of the large-diameter hole, and the outer diameter of the small-diameter outer circle is matched with the inner diameter of the small-diameter hole; during assembly, a first lead on the feedthrough capacitor is inserted into a through hole on the brush bottom plate, then a cylinder of the brush bottom plate and a capacitor body of the feedthrough capacitor are inserted into a step hole on the reduction box body together, wherein the cylinder of the brush bottom plate and a large-diameter excircle on the capacitor body of the feedthrough capacitor are inserted into a large-diameter hole, a small-diameter excircle on the capacitor body of the feedthrough capacitor is inserted into a small-diameter hole, and a step surface between the large-diameter excircle and the small-diameter excircle of the capacitor body is pressed onto a step surface between the large-diameter hole and the small-diameter hole in the step hole through a large-diameter excircle end surface on the capacitor body by an end surface of the cylinder, so that good conductive contact is formed between the two.

3. The wiper motor filter shield assembly of claim 2 wherein said first conductor is in clearance fit with said through hole in said brush base plate.

4. The filter shielding structure of claim 2 or 3, wherein the capacitor body has a clearance fit between 0.1 mm and 0.3mm between the large diameter outer circle and the large diameter hole of the reduction box, and the capacitor body has a clearance fit between 0.0 mm and 0.3mm between the small diameter outer circle and the small diameter hole of the reduction box.