JP2015068681A - Dynamo speed meter for railway vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dynamo speed meter for railway vehicle having a structure capable of effectively preventing a lubrication oil from leaking to the outside over a long period of time.SOLUTION: The dynamo speed meter for railway vehicle includes a power generation part 2 inserted and arranged inside a gear box so as to face a tooth 12a of a gear 12 through a window hole 13 formed on the gear box 11, and inductively generates power accompanied with a rotation of the gear in the power generation part. The dynamo speed meter includes a lid body 3 fixed on an outer surface of the gear box so as to close the window hole. The power generation part is fixed on an inner surface of the lid body via a resin layer 4, and is connected to a terminal block 5 provided outside of the gear box through a through-hole 31 opened in the lid body by a lead wire extending through the resin layer from the power generation part. A bush 7 made of an elastic member formed with a hole 71 into which a lead wire is inserted with an interference is pressed in the through-hole. The bush has a flange part 72 which is brought into contact with the outer surface of a through-hole formation part of the lid body, and is coated with an adhesive agent 8a on a contact surface with the through-hole of the bush, and is coated with an adhesive agent 8b so as to cover the flange part.

Description

  The present invention relates to a railway vehicle speedometer generator.

  This type of railway vehicle speedometer generator is provided in a railway vehicle in order to measure the speed, travel distance, etc. of the railway vehicle using the fact that the output frequency is proportional to the rotational speed. In such a speedometer generator, through a window hole formed in a gear box that houses a gear fixed to the axle, a power generation unit that is inserted and arranged in the gear box so as to face the gear teeth, There is a so-called non-contact type that generates induction power with the rotation of a gear in a power generation unit (see, for example, Patent Document 1). Generally, a speedometer generator includes a lid that is fixed to an outer surface of a gear box so as to close a window hole, and a power generator is fixed to the inner surface of the lid, and the lead wire is extended from the power generator through a resin layer. Is connected to a terminal block provided outside the gear box through a through hole formed in the lid, and can be output to the outside through a cable connected to the terminal block.

  Here, lubricating oil is stored in the lower part of the gear box, and when the gear rotates, the lubricating oil in the gear box is lifted up, and the tapered roller bearings and the like that support the axle are lubricated. At this time, it is necessary to prevent the lubricating oil from leaking outside through the through hole of the lid. For this reason, it has been conventionally performed to cover the inside of the lid with a resin mold (resin layer), fix the power generation unit via the resin layer, and fill the through hole through which the lead wire passes with an adhesive. Yes. However, in such a configuration, the adhesive layer may shrink (deteriorate) due to the deterioration of the adhesive over time, and a gap may be formed between the through hole. It cannot be prevented from leaking through the outside.

Japanese Patent Laid-Open No. 7-12832

  In view of the above, it is an object of the present invention to provide a railway vehicle speedometer generator having a structure capable of effectively preventing leakage of lubricating oil to the outside over a long period of time.

  In order to solve the above-described problem, the power generation unit includes a power generation unit that is inserted and disposed in the gear box so as to face the gear teeth through a window hole formed in a gear box that houses a gear fixed to the axle. The speedometer generator for a railway vehicle according to the present invention that generates electric power in accordance with the rotation of a gear includes a lid fixed to the outer surface of the gear box so as to close the window hole, and a resin layer is provided on the inner surface of the lid. The power generation part is fixed and the lead wire extending from the power generation part through the resin layer is connected to the terminal block provided outside the gear box through the through hole opened in the lid, and the lead wire has a tightening margin in the through hole A bush made of an elastic material in which a hole to be inserted is formed is press-fitted, and the bush has a flange portion that comes into contact with the inner surface or the outer surface of the through hole forming portion of the lid, and is on the contact surface with the through hole of the bush. Adhesive is applied, and the adhesive covers the flange. Characterized in that it is applied.

  According to the present invention, the bush is press-fitted into the through hole formed in the lid for passing the lead wire, and the adhesive is applied to the contact surface with the through hole of the bush and covers the flange portion. Therefore, the lubricating oil does not normally leak out through the through-hole of the lid body. Even if the adhesive layer shrinks due to the deterioration of the adhesive over time, the bush is pressed against the through hole, and the flange portion is in contact with the inner surface or the outer surface of the through hole forming portion of the lid. Leakage of oil to the outside can be effectively prevented over a long period of time.

The front view explaining the attachment state to the gear apparatus for railway vehicles of the speedometer generator for railway vehicles of embodiment of this invention. The fragmentary sectional view from the front side which shows the attachment state of the speedometer generator for rail vehicles in detail. The fragmentary sectional view from the side surface which shows the attachment state of the speedometer generator for rail vehicles in detail. Sectional drawing along the IV-IV line of FIG. Sectional drawing which expands and shows the attachment state of a bush.

  Hereinafter, embodiments of a speedometer generator for railway vehicles according to the present invention will be described with reference to the drawings. 1 to 4, GM is a railway vehicle gear device. The railway vehicle gear device GM has a gear box 11, and a small gear fixed to an input shaft connected to a drive source such as a motor (not shown) that meshes with each other, and an interference fit on the axle. Thus, the fixed large gear 12 (gear) is accommodated, and the lower portion of the large gear 12 is immersed in the lubricating oil accommodated in the gear box 11. Since the railway vehicle gear unit GM itself is a known one, a detailed description thereof is omitted here. And the speedometer generator GE for railway vehicles of this embodiment is provided in the gear box 11 in order to measure the speed of a railway vehicle, a travel distance, etc. using the fact that an output frequency is proportional to a rotational speed.

  The railway vehicle speedometer generator GE includes a power generation unit 2 inserted and arranged in the gear box 11 so as to face the teeth 12a of the large gear 12 through a window hole 13 formed in the gear box 11. Inductive power generation occurs as the gear rotates. The power generation unit 2 includes a lid 3 fixed to the outer surface of the gear box 11 by a bolt B so as to close the window hole 13, and a resin mold 4 (resin layer) having oil resistance is provided on the inner surface of the lid 3. Is fixed through. The power generation unit 2 includes a pair of magnetic poles 21a and 21b disposed so as to face the teeth 12a of the large gear 12, and detection coils 22a and 22b wound around the magnetic poles 21a and 21b, respectively. Lead wires 23 a and 23 b extending from the resin layers 4 from 22 a and 22 b are connected to a terminal block 5 provided outside the gear box 11 through a through hole 31 provided in the lid 3. Then, it can be output to the outside through a cable 6 connected to the terminal block 5. Note that the power generation unit 2 itself is not limited to the above, and other known ones can be used.

  Here, when the large gear 12 rotates, the lubricating oil in the gear box 11 is lifted up, and lubrication of a tapered roller bearing or the like that supports the axle (not shown) is performed. At this time, the lubricating oil is applied to the lid 3. It is necessary not to leak outside through the through-hole 31. In this embodiment, as shown in FIG. 5, a bush 7 made of an elastic material in which two holes 71 and 71 into which the lead wires 23a and 23b are inserted with a tightening margin is formed is press-fitted into the through hole 31. I tried to do it. The bush 7 is made of oil-resistant fluorine-based rubber or the like, and an upper portion (corresponding to the outside of the gear box 11) is formed on the outer surface (upper surface in FIG. 5) of the through hole 31 formation portion of the lid 3. The abutting flange portion 72 is formed.

  When attaching the bush 7 to the through hole 31, the lead wires 23a and 23b are inserted into the holes 71, respectively, and then an adhesive 8a is applied to the outer peripheral surface 73 of the bush 7 except for the flange portion 72 (of the flange portion 72). Adhesive may also be applied to the inner surface.) In this state, press-fitting into the through hole 31 from the outside until the flange portion 72 comes into contact with the outer surface of the lid 3. Then, an adhesive 8 b is applied so as to cover the flange portion 72. As the adhesives 8a and 8b, an epoxy resin having oil resistance is used.

  According to the above, the bush 7 is press-fitted into the through hole 31 formed in the lid 3 so as to pass the lead wires 23a and 23b, and the adhesive 8a is applied to the contact surface of the bush 7 with the through hole 31. Since the adhesive 8b is applied so as to cover the flange portion 72, the lubricating oil does not normally leak through the through hole 31 of the lid 3 to the outside. Even if the adhesive layer shrinks due to the aging of the adhesives 8a and 8b, the bush 7 is pressed against the through hole 31 and the flange portion 72 is brought into contact with the outer surface of the lid 3 where the through hole 31 is formed. Since they are in contact with each other, leakage of the lubricating oil to the outside can be effectively prevented over a long period of time.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said thing. In the above embodiment, the bush 7 is press-fitted into the through-hole 31 from the outside, but may be press-fitted into the through-hole 31 from the inside.

GE ... speedometer generator for railway vehicle, GM ... gear apparatus for railway vehicle, 11 ... gear box, 12 ... large gear (gear), 13 ... window hole, 2 ... power generation part, 21a, 21b ... magnetic pole (power generation part) 22a, 22b ... detection coil, 23a, 23b ... lead wire, 3 ... lid, 31 ... through hole, 4 ... resin layer (resin mold), 5 ... terminal block, 7 ... bush, 71 ... hole, 72 ... flange Part, 8a, 8b ... adhesive.

Claims (1)

It has a power generation part that is inserted and arranged in the gear box so as to face the gear teeth through a window hole formed in the gear box that houses the gear fixed to the axle, and induction power generation is performed at the power generation part as the gear rotates. A speedometer generator for railway vehicles,
The lid is fixed to the outer surface of the gear box so as to close the window hole, the power generation unit is fixed to the inner surface of the lid via a resin layer, and the lead wire extending from the power generation unit through the resin layer is the lid Connected to the terminal block provided outside the gear box through the through-hole established in
A bush made of an elastic material in which a hole through which the lead wire is inserted with a tight margin is formed is press-fitted into the through hole, and the bush has a flange portion that comes into contact with the inner surface or the outer surface of the through hole forming portion of the lid. A speedometer generator for a railway vehicle, wherein an adhesive is applied to a contact surface with the through hole of the bush, and an adhesive is applied so as to cover the flange portion.

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