JPH054746U - Motor terminal structure - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents solder bridging without separating terminals from each other to significantly reduce the size of the motor, and promotes the flow of the resin material filled in the recesses where the terminals are exposed to improve sealing performance. Improve. The lead wire connecting portions 13a to 16a at the tips of the terminals 13 to 16 arranged in parallel in the motor axial direction are sequentially shifted in the axial direction of the motor shaft and in the axial direction to be exposed stepwise from the end case 9. A partition wall 9f is formed between the lead wire connecting portions 13a to 16a, and the partition wall 9f is cut out to form a communication groove 9g.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a terminal structure of a motor.

[0002]

[Problems to be Solved by Prior Art and Invention]

 Generally, a motor of this type is provided with a plurality of terminals whose base ends are connected to brushes and the like, and the tips of the terminals must be exposed to the outside of the motor in order to connect the lead wires. However, since there is a risk that the terminals will become conductive with the adjacent terminals due to the so-called solder bridging phenomenon during solder connection, it is necessary to arrange them in parallel with a sufficient spacing to ensure an insulation distance. However, the terminal installation space inevitably becomes large, and especially in the case of a motor equipped with many terminals such as a motor equipped with an additional mechanism such as a rotation detection mechanism, it is necessary to secure a particularly large terminal installation space. Increasing the size becomes a problem. Therefore, it has been proposed to reduce the size of the motor by distributing the exposed positions of the terminals to two locations.However, this method will disperse the lead wire connection work locations, and this will reduce the work during manufacturing. However, there is an inconvenience that the number of sealing points increases and the cost increases when the lead wire connection part is sealed with a resin material. It is also conceivable to interpose an insulating member between the lead wire connection parts at the tip of the terminal to prevent solder bridging, but in this case, when the lead wire connection parts are sealed, the flow of viscous resin material There is a risk that the insulating material will interfere with the insulation and reduce the sealing performance.

[0003]

[Means for Solving the Problems]

 The present invention was devised in view of the above circumstances to provide a motor terminal portion structure capable of eliminating these drawbacks. Insert a plurality of terminals that are parallel to each other in the axial direction of the shaft, connect the lead wires to the lead wire connection parts of the terminal tips exposed in the recesses of the end case, and then insert the resin material into the recesses. In the motor, the lead wire connection part of each terminal is sequentially shifted in the axial direction of the motor shaft and in the axial direction to be exposed stepwise from the end case, and the exposed lead wire connection part is The lead wires are inserted through the side wall of the recess in a direction substantially orthogonal to the motor shaft, while the ends of the termini are oriented in the recess of the end case facing the lead wires. The partition wall formed to partition between the lead wire connection parts of the socket is cut out on the recess side wall side to form a communication groove, and each partition chamber is connected on the recess side wall side from the lead wire connection part. To do. With this configuration, the present invention makes it possible to arrange a plurality of terminals as close to each other as possible, downsizes the motor, and promotes the flow of the resin material filled in the recesses to improve sealing performance. It is designed so that the improvement of can be measured.

[0004]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a motor having a speed reduction mechanism, which is mounted on a yoke 3 having a magnet 2 fixed to an inner periphery thereof, a motor shaft 4 supported in the yoke 3, and a motor shaft 4. The armature core 5 and the commutator 6, a pair of brushes 7 slidingly contacting the commutator 6, a brush holder 8 for holding the brush 7, an end case 9 for covering the opening of the yoke 3, and a deceleration incorporated in the end case 9. Although it is composed of the mechanism 10 and the like, all of these basic configurations are the same as conventional ones.

Reference numeral 11 denotes a pair of rotation detecting brushes assembled to the brush holder 8. The rotation detecting brushes 11 are elastically slid on a rotation detecting slip ring 12 arranged in parallel with the commutator 6. It is configured to touch. That is, on the outer peripheral portion of the rotation detecting slip ring 12, a pair of insulating portions 12b and a pair of conducting portions 12a electrically connected to each other are alternately formed in the circumferential direction. The sliding contact of the blade 11 makes it possible to detect the conduction signal twice each rotation.

Further, 13 to 16 are terminals assembled to the brush holder 8, and these terminals 13 to 16 face the one end face of the brush holder 8 in the axial direction of the motor shaft 4 and The base ends of the terminals 13 and 15 of the terminals 13 to 16 are connected to the brush 7, respectively, while the base ends of the terminals 14 and 16 are connected to the brush 7, respectively. Each of them is connected to the rotation detecting brush 11. That is, by alternately arranging the terminals 13 and 15 connected to the brush 7 and the terminals 14 and 16 connected to the rotation detecting brush 11 in parallel, the insulation distance between the terminals is secured. It

By the way, the brush holder 8 is formed so as to be fitted in a holder accommodating portion 9a formed in the end case 9 so as to be fitted in the end case 9 in the axial direction of the motor shaft 4. Although the terminals 13 to 16 are inserted into the terminal insertion holes 9b formed as described above, the lead wire connecting portions 13a to 16a at the tips of the terminals are sequentially displaced in the axial direction and the axial direction of the motor shaft 4. It is exposed from the end case 9 to the outside. That is, by exposing the lead wire connecting portions 13a to 16a at the tip of each terminal from the end case 9 in a stepwise manner, a sufficient insulation distance is secured between the lead wire connecting portions 13a to 16a. ing.

On the other hand, an inclined concave portion 9c is formed on the outer surface of the end case 9, and the lead wire connecting portions 13a to 16a at the tips of the terminals are exposed to the outside in the concave portion 9c. However, in each of the lead wire connecting portions 13a to 16a, a lead wire insertion hole 9e (which may be in the shape of a groove) formed in the side wall 9d of the recess 9c is inserted, and a direction substantially orthogonal to the motor shaft 4 is formed. The facing lead wire 17 is adapted to be solder-connected, and after the solder connection, the recess 9c is filled with a resin material. Reference numerals 13b to 16b are lead wire insertion grooves formed in the lead wire connecting portions 13a to 16a.

Further, 9f is a partition wall formed in the concave portion 9c, and the partition wall 9f of the lead wire 17 is positioned so as to be located between the lead wire connecting portions 13a to 16a exposed stepwise. It is formed in multiple numbers facing the insertion direction, and prevents so-called solder bridging phenomenon that causes adjacent terminals to conduct at the time of the solder connection, and after the resin material is filled, the thrust direction of the terminals 13 to 16 is reduced. By restricting the movement, the displacement of the brush 7 and the rotation detecting brush 11 connected to the base ends of the terminals 13 to 16 is restricted.

Furthermore, 9g is a communication groove formed in the recess 9c, and the communication groove 9g is a lead wire which is an exposed portion of each of the terminals 13 to 16 partitioned by the partition wall 9f. The flow of the resin material filled in the recess 9c is promoted by communicating the connection portions 13a to 16a on the side wall 9d side, whereby the exposed portions of the terminals 13 to 16 and the lead wires 17 are connected. The resin material can now be positively introduced into the gap. Further, 9h is a thin groove formed along the side wall 9d on the bottom surface of the communication groove 9g, and the thin groove 9h allows the flow of the resin material at a position below the lead wire insertion hole 9e. By further promoting it, the resin material is allowed to flow into the lead wire insertion hole 9e without a gap.

In the embodiment of the present invention constructed as described above, the lead wire connecting portions 13a to 16a at the tip of the terminal are stepwise arranged so as to be sequentially displaced in the axial direction and the axial direction of the motor shaft 4. Therefore, the terminals 13 to 16 can be arranged as close to each other as possible while ensuring a sufficient insulation distance. Therefore, although the motor 1 is provided with a plurality of terminals, it goes without saying that there is no inconvenience that the installation space for the terminals 13 to 16 is particularly large and the motor 1 is enlarged. Eliminates the inconvenience that the work of connecting the lead wires 17 is dispersed and the workability at the time of manufacture is reduced like the case where the exposed positions of ~ 16 are dispersed, and the cost of the resin material is increased due to an increase in the number of locations. As a result, the cost of the motor 1 having a plurality of terminals can be significantly reduced.

Moreover, since the partition wall 9f is provided between each of the lead wire connecting portions 13a to 16a, it is inconvenient that the terminals adjacent to each other are connected by the solder bridge during the solder connection. As a result, the terminals 13 to 16 can be arranged closer to each other, and the motor 1 can be further downsized.

Further, since the partition wall 9f restricts the thrust movement of the terminals 13 to 16 after the resin material is filled, the brush 7 connected to the base ends of the terminals 13 to 16 and the rotation detecting brush. It is possible to surely prevent the positional deviation of 11 and form a highly reliable motor that is not likely to cause abnormal wear of the brush or defective rotation of the motor.

Further, in the concave portion 9c, a communicating groove for communicating the exposed portions of the respective terminals 13 to 16 partitioned by the partition wall 9f on the side wall 9d side from the positions of the lead wire connecting portions 13a to 16a. Since 9 g is formed, it is possible to promote the flow of the resin material filled in the recess 9 c to positively flow the resin material into the exposed portions of the terminals 13 to 16 and the gaps between the lead wires 17. As a result, it is possible to eliminate the inconvenience of forming bubbles in the recess 9c and significantly improve the sealing performance.

Furthermore, since a narrow groove 9h is formed along the side wall 9d at the bottom surface of the communication groove 9g, the flow of the resin material can be further promoted at a position below the lead wire insertion hole 9e. As a result, the resin material can be made to flow into the lead wire insertion hole 9e without any gap, and the sealing performance can be further improved.

[0016]

[Operation effect]

 In short, since the present invention is configured as described above, the lead wire connecting portion of each terminal is provided with a plurality of terminals arranged in parallel in the axial direction of the motor shaft. The position is sequentially shifted in the axial direction of the shaft and in the axial direction and exposed stepwise from the end case, so it is possible to arrange the terminals close to each other while ensuring a sufficient insulation distance, and to greatly reduce the terminal installation space. it can. In other words, the motor can be downsized without having to disperse the exposed positions of the terminals at multiple locations, which disperses the lead wire connection work locations and reduces workability at the time of manufacture, and the resin material It is possible to eliminate all the inconveniences such as an increase in the number of filling places and cost increase, and as a result, it is possible to significantly reduce the cost of a motor having a plurality of terminals.

Moreover, since a partition wall is formed in the recess of the end case so as to face the lead wires and separate the lead wire connecting portions of the respective terminals, the adjacent terminals are connected to each other when soldering. As a result, it is possible to reliably prevent the inconvenience of causing electrical continuity, and as a result, it is possible to arrange the terminals closer to each other and further reduce the size of the motor.

Further, since the partition wall restricts the thrust movement of the terminal when the recess is filled with the resin material, the brush connected to the base end of the terminal is surely prevented from being displaced. A highly reliable motor without abnormal brush wear or motor rotation failure can be achieved.

Further, since the communication groove is formed in the recess by notching the recess side wall side of the partition wall, the partition chambers can be communicated with each other on the recess side wall side with respect to the lead wire connecting portion. When a viscous resin material is filled in the recesses, the partition wall does not obstruct the flow of the resin material and promotes the flow of the resin material to the spaces between the partition chambers and the lead wires. The resin material can be positively flowed in, and as a result, it is possible to eliminate the inconvenience of forming bubbles in the recesses and significantly improve the sealing performance.

[Brief description of drawings]

FIG. 1 is a front view of a motor.

FIG. 2 is a rear view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a left side view of the same.

FIG. 5 is an enlarged front view of the main part of the same.

FIG. 6 is a cross-sectional view of the motor assembly.

FIG. 7 is a left side view of the above.

FIG. 8 is a front view of an end case.

FIG. 9 is a plan view of the same.

FIG. 10 is a left side view of the above.

FIG. 11 is a right side view of the above.

FIG. 12 is a partially cutaway plan view of the same.

FIG. 13 is a partially cutaway plan view of the same.

FIG. 14 is a front view of the brush holder assembly.

FIG. 15 is a plan view of the same.

FIG. 16 is a left side view of the above.

FIG. 17 is a right side view of the above.

FIG. 18 is a sectional view taken along line XX of the above.

FIG. 19 is a Y-Y sectional view of the same.

[Explanation of symbols]

 1 Motor 3 Yoke 9 End Case 9c Recess 9d Side Wall 9f Partition Wall 9h Fine Groove 13 Terminal 14 Terminal 15 Terminal 16 Terminal 17 Terminal 17 Lead Wire

Claims (1)

[Claims for utility model registration] [Claim 1] The end case for covering the yoke opening,
Insert a plurality of terminals that are parallel to each other in the axial direction of the motor shaft, connect the lead wires to the lead wire connection parts at the ends of the terminals exposed in the recess of the end case, and further connect the resin material to the recess. The lead wire connection portion of each terminal is sequentially shifted in the axial direction of the motor shaft and in the axial direction to be exposed stepwise from the end case, and the exposed lead wire connection portion is recessed. While connecting the lead wires that are inserted from the direction substantially orthogonal to the motor shaft through the side wall, inside the recess of the end case, a partition wall that is formed to partition the lead wire connection parts of each terminal facing the lead wire direction is formed. A terminal portion of the motor characterized in that the side wall of the recess is cut out to form a communication groove so that the partition chambers are communicated with each other on the side wall of the recess more than the lead wire connection part. Elephants.