JPH04124871U - Fixing device for chiyoke coil in small motor - Google Patents

Abstract

(57) [Summary] [Objective] To provide a device for fixing a choke coil in a small motor, which fixes a coil and soft ferrite by simple means without using adhesive. [Structure] A choke coil (11) is inserted into a choke coil storage recess (32) formed on the outer surface of an end bell (31) that closes the end of a housing of a small motor, with the choke coil (11) being pressed in its length direction. . Further, the end of the choke coil (11) is held down by a terminal (21) that is locked to the end bell (31), and the lead terminal (13) of the choke coil (11) is electrically connected to that part. Connect to.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is incorporated into an end bell that closes one end of the housing of a small motor. A fixing device for choke coils, especially for small motors in automobile fuel pumps, etc. Regarding a choke coil fixing device for a small motor that is excellent for use. It is.

0002

[Conventional technology]

When using a small motor in an automobile fuel pump, etc., the motor housing A choke coil is placed in an end bell that closes one end of the choke coil. below, The choke coil fixing device will be explained.

0003 FIG. 7 is a diagram showing soft ferrite. FIG. 8 is a diagram showing the coil. Figure 9 is a diagram showing a choke coil assembled with soft ferrite and a coil. be. Figure 10 explains a recess for housing a choke coil in a small motor. It is a diagram. Figure 11 shows the choke housed in the recess of the end bell in a small motor. It is a figure explaining a coil. FIG. 12 is a diagram showing the appearance of the small motor.

0004 First, the choke coil 41 is made of soft ferrite 4 with adhesive 44 attached. 2 into a coil 43 wound with an insulated conductive wire, and then 44 is completed by drying. On the other hand, for small motors, as shown in Figure 12, A rotating shaft 92 protrudes from one end of the housing 91 and closes the other end of the housing 91. A terminal that supplies power from a power source (not shown) on the outer surface of the end bell 61 73, 73' are formed.

[0005] Further, as shown in FIG. 10, for example, the inner end surface of the end bell 61 has a choker. Choke coil storage recesses 72 and 72' for storing the choke coil 41, and the terminal terminal ends 74, 74' electrically connected to the cables 73, 73'; Brushes 75, 75' and terminals 79, 79' supplying power to the commutators that are not is formed.

[0006] Inside the choke coil storage recesses 72 and 72', there is at least one Ribs 76 are formed. The choke coil 41 is the choke coil housing. It is press-fitted into a rib 76 formed in the storage recess 72 and stored. A choke coil, which is formed only from insulated conductive wire, cannot be used from the outside. Although the soft ferrite 42 and the coil 43 are easily deformed under the pressure of The choke coil 41 fixed by the agent 44 has a certain degree of strength. , it will not deform even if it is press-fitted into the choke coil storage recess 72.

[0007] In addition, the soft ferrite 42 is bonded to the coil 43 with an adhesive 44. As a result, the soft ferrite 42 falls off alone from the choke coil storage recess 72. Never. In this way, the choke coil 4 stored in the choke coil storage recess 72 The lead terminals 45 and 45' of 1 are connected to a notch 77 formed in the terminal end 74. After being temporarily attached, electrical connection is made with solder 78.

[0008] The terminal 73 of the small motor configured as described above is not shown in the figure. The end of the connecting pin connected to one end of the power supply is connected. and the end of the connecting pin The current supplied to the terminal 73, the terminal end 74, the choke coil 4 1. Pass through the terminal 79, brush 75', commutator and armature (not shown), and connect to the other side. Brush 75, terminal 79', choke coil 41', terminal end 74', tar It flows through terminal 73' from a connection pin (not shown) to the other end of the power supply.

[0009]

[Problem that the idea aims to solve]

However, in the above conventional example, the soft ferrite 42 and the coil 43 are bonded together using an adhesive 44. Because it is fixed with It is essential. Also, if a small motor is used in an automobile fuel pump, the gasoline immersed in water.

0010 Therefore, the adhesive 44 that fixes the soft ferrite 42 and the coil 43 is , a special material was needed that would not deteriorate its adhesive strength when immersed in gasoline. Conventional The soft ferrite 42 and coil 43 in the example are fixed using the adhesive described above. Therefore, it had the disadvantage of being expensive.

[0011] Furthermore, the choke coil 41 in the conventional example is formed on the end bell 61. When press-fitting into the rib 76 of the choke coil storage recess 72, the size of the rib 76 is If it is too large, the choke coil 41 may not be able to be accommodated, or the rib 76 may If the size is too small, it will fall out of the choke coil storage recess 72. Therefore However, the disadvantage is that it is necessary to strictly control the size and shape of the rib 76. has.

0012 This invention is intended to solve the above problems, and is a combination of coils and soft blowjobs. A small motor that can be fixed with a simple method without using adhesive. The purpose of the present invention is to provide a device for fixing a choke coil in a vehicle.

[0013]

[Means to solve the problem]

In order to achieve the above object, the choke coil in the small motor of the present invention is fixed. The fixing device is installed in the recess formed in the end bell that closes the end of the small motor housing. This is to fix the choke coil, and when the choke coil is inserted in the length direction. A choke coil storage is formed to hold one end of the choke coil. The recess and the part that electrically connects the lead terminal of the choke coil The other end of the choke coil has a pressing flat part and is locked to the end bell. and a terminal having an engaging portion.

[0014]

[Effect] The choke coil of this invention is an end bell that blocks one end of the housing of a small motor. The choke coil is inserted lengthwise into the choke coil storage recess formed in the Ru.

[0015] For example, one end of the soft ferrite forming the choke coil is The choke coil is locked at the bottom of the recess, and the other end is connected to the top by the terminal. It will be fixed by pressing it down. Therefore, the choke coil is connected to the choke coil storage recess and the terminal. It is fixed so that it does not fall off the end bell, and does not use any adhesive. For example, it is excellent as a small motor for a fuel pump that is immersed in gasoline. There is.

[0016] In addition, the choke coil fixing device in this invention does not use adhesive. , no adhesive is required, and there is no need to worry about applying or drying the adhesive. Since there is no such thing, it is possible to provide an inexpensive small motor. Furthermore, since the choke coil is fixed by pressing it from above and below, The shape of the recess into which the coil is inserted does not have to be precisely machined.

[0017]

【Example】

With reference to FIGS. 1 to 6, the choke coil in the small motor of the present invention is fixed. Describe the fixed device. Figure 1 shows one implementation of this invention when fixing a choke coil. It is an example explanatory diagram.

[0018] FIG. 2 is a side view of the end bell of FIG. 1. Figure 3 shows the terminus in this invention. FIG. 2 is an explanatory diagram of an embodiment of a null. Figure 4 shows the choke coil inserted into the recess of the end bell. FIG. 4 is a diagram for explaining fixing by a terminal when Figure 5 explains the state in which the choke coil is fixed to the end bell of a small motor. This is a diagram for Figure 6 is from the bottom of the choke coil storage recess in Figure 5. This is a diagram showing the.

[0019] In FIG. 1, in the end bell 31 that closes one end of the housing of the small motor. For example, the outer surface has a choke housing housing choke coils 11 and 11', which will be described later. coil storage recesses 32, 32' and the choke coil storage recesses 32, 32'. Hold down the soft ferrites 12 and 12' of the choke coils 11 and 11' that are housed. The locking parts 33 and 33' that fix the terminals 21 and 21' for a terminal fitting recess 34 into which the cylindrical portions 22, 22' of the terminals 21, 21' are fitted; 34', the motor bearing 36, and, for example, gasoline between the rotor and stator. an opening 37 into which a check valve is inserted when the terminal 21 is inserted; , 21', and the brush holder terminal insertion hole (Fig. (not visible) are formed.

[0020] Further, as shown in FIG. 2, brushes 17, 17' are provided on the opposite side of the end bell 31. (17' is not shown) attached to brush holders 15, 15' (15' (not shown) connects the brush holder terminals 18 and 19 to the brush holder insertion hole. It is fixed by inserting it into the Then, on the brush holders 15 and 15' is provided with a pigtail connection 16 that connects with the brushes 17, 17'.

[0021] The terminal 21 shown in Figure 3 is not shown when connecting to an external power source at one end. a cylindrical part 22 formed into a cylindrical shape for fitting the end of a connecting pin without , an engaging portion 23 that engages with the engaging portion 33 of the end bell 31, and a soft flap at the other end. While pressing one end of the elite 12, the lead terminal 1 of the choke coil 11 is pressed. 3 or 13'.

[0022] In addition, the choke coil storage recess 32 formed in the end bell 31 is as shown in FIG. As shown in FIG. 6, at least one rib 35 is formed on the bottom thereof. Choke coil storage recess 32 provided in end bell 31 configured as above , 32', choke coils 11, 11' connect lead terminals 13, 13'. It is inserted with the top facing up. Inserted into choke coils 11, 11' The ends of the soft ferrites 12, 12' are arranged in choke coil storage recesses 32, 32'. It is pressed against the rib 35 formed on the bottom of the. Next, terminal 21, 2 1', the cylindrical parts 22, 22' and the engaging parts 23, 23' are connected to the terminal fitting recess 34. , 34' and the locking parts 33, 33', respectively.

[0023] At the same time as the above installation of terminals 21 and 21', The flat parts 24, 24' press the upper ends of the choke coils 11, 11'. So Then, the lead terminals 13 of the choke coils 11, 11' are bent 90 degrees to form a tab. It is soldered to the flat part 24 of the terminal 21.

[0024] Further, the other lead terminals 14, 14' of the choke coils 11, 11' are connected to the choke coils 11, 11'. It is electrically connected to the holder terminals 18, 18' by, for example, solder. In this way, without using adhesive, the choke coils 11, 11' can be Choke coil storage recesses 32, 32' provided in the end bell 31 and the terminal The flat portions 24, 24' of

[0025] In a small motor configured as above, connection pins are connected to the power supply (not shown). The end portion of the terminal fitting recess 34 is fitted into the terminal fitting recess 34 . And the current supplied from one end of the power supply is connected to the end of the connection pin (not shown). , the cylindrical part 22 of the terminal 21, the flat part 24 of the terminal 21, and the part in contact with the flat part 24. The choke coil 11 passes through the lead terminal 13 of the choke coil 11 connected to the board terminal 14, brush holder terminal 18, brush 17, commutator (not shown), Passing through the armature, brush 17' on the other side, brush holder terminal 18', choke coil 11', lead terminal 14', choke coil 11', lead terminal 13', terminal The flat part 24' of the null 21', the cylindrical part 22', the end of the connecting pin (not shown), Flows to the other end of the power supply.

[0026] In this way, it is easy to connect the end of the connection pin connected from the power supply to the terminal. You can definitely do it.

[0027]

[Effect of the idea]

According to the present invention, the recess provided in the end bell with the choke coil in the longitudinal direction and fixed the choke coil between the bottom of the recess and the terminal. , no need to use adhesive.

[0028] Therefore, adhesive and the trouble of applying and drying the adhesive are unnecessary. An inexpensive small motor can be provided. In addition, with the above structure, the choke The choke coil can be used without increasing the machining accuracy to press fit the end bell. It will not fall out from the recess provided in the.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention when fixing a choke coil.

FIG. 2 is a side view of the end bell in FIG. 1;

FIG. 3 is an explanatory diagram of one embodiment of the terminal in the present invention.

FIG. 4 is a diagram for explaining fixation by a terminal when a choke coil is inserted into a recess of an end bell.

FIG. 5 is a diagram for explaining a state in which a choke coil is fixed to an end bell of a small motor.

FIG. 6 is a top view from the bottom of the choke coil storage recess in FIG. 5;

FIG. 7 is a diagram showing soft ferrite.

FIG. 8 is a diagram showing a coil.

FIG. 9 is a diagram showing a choke coil assembled with soft ferrite and a coil.

FIG. 10 is a diagram illustrating a recess for accommodating a choke coil in a small motor.

FIG. 11 is a diagram illustrating a choke coil housed in a recess of an end bell in a small motor.

FIG. 12 is a diagram showing the appearance of a small motor.

[Explanation of symbols]

11, 11' Choke coil 12, 12' Soft ferrite 13, 13' Lead terminal 14, 14' Lead terminal 21, 21' terminal 22, 22' Cylindrical part 23, 23' Engagement part 24, 24' flat part 31 End Bell 32, 32' Choke coil storage recess 33, 33' Locking part 34, 34' Terminal fitting recess 35 ribs 36 Bearing 37 Opening 38 Protrusion

Claims (1)

[Scope of utility model registration request] Claim 1. A choke coil fixing device for a small motor, in which the choke coil is housed in a recess formed in an end bell that closes the end of the housing of the small motor. The end bell has a choke coil storage recess formed to lock one end of the coil, and a flat portion that presses the other end of the choke coil by a portion that electrically connects the lead terminal of the choke coil. A device for fixing a choke coil in a small motor, comprising: a terminal having an engaging portion that is engaged with the terminal;