JP2001165943A - Revolution sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the automatic production of a revolution sensor by means of an automatic assembling device, for improving the productivity and economic efficiency of the sensor. SOLUTION: A lubricating notch, through which lubrication oil is injected toward a washer from the outside of a housing used for constituting the revolution sensor, is formed at an appropriate position on the inner peripheral surface of the coupling shaft passing hole of the housing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotation sensor used for detecting, for example, the rotation of an axle of an automobile, and more particularly to an automatic rotation sensor for improving the productivity and economy of the rotation sensor. The present invention relates to a configuration of a rotation sensor that enables automatic production using an assembly device.

[0002]

2. Description of the Related Art There are a wide variety of conventional rotation sensors installed in an automobile or the like and used to detect the number of rotations of wheels (axles) of the vehicle. 2. Description of the Related Art As a structure of a conventional rotation sensor using an element, there is a structure composed of constituent members shown in FIG. Hereinafter, an assembling procedure and a configuration of the conventional rotation sensor will be described with reference to FIG.

First, the components will be described. Reference numeral 1 denotes a connector portion. The connector portion 1 comprises a first housing 3 formed by insert-molding connection terminals 2 and a second housing 5 formed by mounting a hall element 4. The first housing 3 and the second housing 5 sandwich the circuit board 6 therein.

[0004] 7 is a thrust receiving plate, 8 is a rotating body having a disk-shaped magnet 9 mounted thereon, 10 is a coil spring for urging the rotating body 8 in the thrust direction, 11 is a bearing of the rotating body 8,
Reference numeral 12 denotes a holding plate, 13, 14, and 15 washers, 16 a housing made of a non-magnetic material, 17 a coupling shaft that is axially coupled to the rotating body 8, and 18 a packing.

In order to assemble a rotation sensor using the above-described components, first, a coupling shaft 17 is inserted into a housing 16 and then the coupling shaft 1 is mounted.
The washer 15, 14, 13 and the holding plate 12 are inserted in this order from the side opposite to the insertion side of 7 toward the center of the coupling shaft 17.

Next, the coil spring 10, the bearing 11, and the rotating body 8 are inserted in this order from the insertion side of the coupling shaft 17 inserted into the housing 16, and the rotating body 8 is axially connected to the coupling shaft 17. At the same time, the rotating body 8 and the coupling shaft 17 are rotatably supported by the housing 16 via the bearing 11.

Next, after the thrust receiving plate 7 is applied to the end face of the disk magnet 9, the connector portion 1 containing the Hall element 4 is closely fitted into the housing 16 via a plurality of packings 19, Further, by setting the packing 18 in the housing 16, a rotation sensor having a configuration shown in FIG. 7 is configured.

[0008]

However, in the process of assembling the rotation sensor, the coupling shaft 17 is conventionally inserted into the housing 16 and then the coupling shaft 17 is inserted from the insertion end of the coupling shaft 17. In order to achieve smooth rotation, washers 15, 14,
13 and the presser plate 12 are fitted. At this time, grease is applied to the washers 15, 14, 13 and the presser plate 12, and the washers 15, 1 coated with grease are applied.
A manual operation was required in which an assembler inserted each of the 4, 13 and the presser plate 12 into the coupling shaft 17 using a tool such as tweezers.

[0009] For this reason, the manual assembly man-hours are indispensable in the conventional assembly work of the rotation sensor, and it is impossible to perform fully automatic assembly by an automatic assembly apparatus. There has been a problem that the productivity and production economics of the rotation sensor are reduced because the labor and the time are unavoidable. In addition, the above-mentioned washers 15, 14,
Grease, which is a lubricant, must be applied to each of the washers when the support 13 and the holding plate 12 are inserted through the coupling shaft 17, and the grease must be skewed to the coupling shaft 17 in the housing 16. During the operation of passing the washer coated with on the coupling shaft 17, the housing comes into contact with another object such as the housing, thereby causing the housing or the like to be stained with grease.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to assemble a rotation sensor using an automatic assembling apparatus, and particularly to perform an operation of inserting a plurality of washers into the coupling shaft by using an automatic assembling apparatus. It is a first object of the present invention to provide a rotation sensor structure that makes possible.

Further, in the present invention, the lubricating oil can be applied to a plurality of washers inserted through the coupling shaft by an automatic machine so that the effective application of the lubricant and the contamination (contamination) by the lubricant can be prevented. A second object is to prevent it from occurring.

[0012]

In order to achieve the first and second objects, according to the present invention, a coupling shaft insertion hole is formed inside a housing made of a non-magnetic material, and the coupling insertion hole is formed. A coupling shaft integrally connected to the rotating magnet is inserted into the hole, and a plurality of washers are inserted from a tip end of the coupling shaft on the insertion side, and then a pressing plate coil spring is inserted. By using the resilient pressure of the above, the pressing plate locked to the coupling shaft is pressed into contact with the end face of the coupling shaft insertion hole formed in the housing via a plurality of washers to perform coupling. In the rotation sensor that regulates the thrust of the shaft in the thrust direction, the outside of the housing is located at an appropriate position on the inner peripheral surface of the coupling shaft insertion hole formed in the housing. It is characterized in that a rotation sensor to form a lubrication notches which allowed to inject the lubricating oil toward the washer.

According to a second aspect of the present invention, in addition to the first aspect, a part of the oiling notch is a rotation sensor closed by a washer.

According to a third aspect of the present invention, in addition to the first aspect, the lubricating oil is grease and is a rotation sensor attached to the peripheral surface of the washer.

According to the rotation sensor described above, it is possible to assemble a plurality of washers and a holding plate with an automatic assembling device, which has been impossible in the past, and also to perform lubrication with an automatic lubrication device. In addition, the productivity and manufacturing economy of the rotation sensor are greatly improved. Further, the lubricating notch is not completely closed by the washer, so that the lubricating oil can be circulated from a partial opening of the notch toward the inner peripheral surface of the washer. Further, by applying grease as lubricating oil, leakage of lubricating oil attached to the washer can be prevented.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in FIGS. 1 to 5. However, the present invention is different from the conventional housing in the structure and operation. Since the other components are the same as the conventional example, the same components are denoted by the same reference numerals as those used in the description of the conventional example, and the description of the structure is omitted.

FIG. 1 is a sectional view of the rotation sensor according to the present embodiment, and a housing 21 constituting the rotation sensor A will be described in detail with reference to FIGS. The housing 21 is a cylindrical member made of a non-magnetic material, and a connector member for fitting the connector portion 1 having the same configuration as the connector portion 1 described in the conventional example into one opening of the housing 21. A fitting portion 22 is formed, and a mounting screw hole 23 for screwing the housing 21 to, for example, a vehicle body is formed in the other opening of the housing 21. The connector member fitting portion 22 is penetrated by a central shaft hole 24.

A bearing fitting portion 25 for fitting the same bearing 11 as the bearing 11 described in the prior art is formed on the side of the center shaft hole 24 on the connector member fitting portion 22 side. On the mounting screw hole 23 side of the hole 24, a coupling shaft penetrating portion 26 through which the coupling shaft 17 is loosely inserted, and inside the coupling shaft penetrating portion 26, the coupling shaft penetrating portion is provided. A receiving step 27 is formed to receive the movement of the coupling shaft 17 in the thrust direction.

What is important in the present embodiment is that a plurality of cutout portions 28 for oiling are formed on the inner peripheral surface of the coupling shaft penetrating portion 26 from the mounting screw hole 23 side to the receiving step portion 27. In the present embodiment, it is formed at a position equally divided by four in the circumferential direction). A part of the lubricating notch 28 is closed by the washer 15, and the top is in a non-blocking state, and a gap shown by a symbol B in FIGS. 4 and 5 is generated. Lubricating oil is injected. 29
Indicates a packing fitting groove formed in the mounting screw hole 23.

Next, the process of automatically assembling the rotation sensor A using the housing 21 formed as described above will be described with reference to FIG.
The coupling shaft 17 similar to that described in the conventional example is inserted into the inside of the housing screw hole 23 through the opening of the housing screw hole 23. Three washers 15, 1 toward the tip of the coupling shaft 17 inserted into the
Then, the pressing plate 12 is inserted and overlapped. At this time, several washers 15, 14, 13
While being received by the receiving step 27 of the housing 21, the inner diameter of the holding plate 12 is locked by a step 17 </ b> A formed on the coupling shaft 17.

Next, the coil spring 10, the bearing 11, and the rotating body 8 are inserted in this order from the connector member fitting portion 22 side of the housing 21 into the insertion tip of the coupling shaft 17, and the rotating body 8 and the rotating body 8 are inserted. Coupling shaft 17 axially connected to
Is rotatably supported by the housing 21 via the bearing 11.

Next, after the thrust receiving plate 7 is applied to the end face of the disk magnet 9, the connector portion 1 containing the Hall element 4 is closely fitted into the housing 21 via a plurality of packings 19. Next, by crimping the opening edge of the connector member fitting portion 22 of the housing 21 and further setting the packing 18 in the housing 21, the rotation sensor having the configuration shown in FIG. is there.

After the rotation sensor is constructed, the opening of the mounting screw hole 23 of the housing 21 is directed upward.
The lubrication is performed by inserting the tip of a lubrication nozzle 30 shown in FIG. 4 provided in an automatic lubrication device (not shown) from the opening into a lubrication notch 28 formed in the housing 21 to perform lubrication. The grease (lubricating oil) discharged from the nozzle 30 is supplied to the surfaces of the washers 15, 14, 13 and the surface of the holding plate 12.

When the grease-lubricated rotation sensor is used, the plurality of washers 13, 14, 15 are pressed by the pressing plate 1 by the resilient action of the coil spring 10 during use.
While rotating while being pressed between the receiving step 2 and the receiving step 27 of the housing 21, the heat is generated. The heat reduces the viscosity of the grease, and lubricates between the washers 13, 14, 15 and the holding plate 12. Because the oil is being gradually lubricated,
The smooth rotation of the coupling shaft 17 becomes possible.

[0025]

As described above, according to the rotation sensor of the present invention, the operation of assembling the rotation sensor using the constituent members of the rotation sensor can be automatically assembled using an automatic assembling apparatus. Lubricating oil can also be automatically injected into the installed rotation sensor by an automatic lubrication device, so that the entire assembly process of the rotation sensor can be fully automated using an automatic assembly device. Sensor productivity and manufacturing economy are greatly improved.

According to the present invention, after the rotation sensor is assembled by the automatic assembling apparatus, the lubricating oil can be automatically lubricated to the rotation sensor by the automatic lubrication apparatus. It is also possible to prevent oil contamination caused by the oiling means.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a rotation sensor according to the present invention.

FIG. 2 is a sectional view of a housing used to assemble the rotation sensor of the present invention.

FIG. 3 is a right side view of a housing used to assemble the rotation sensor of the present invention.

FIG. 4 is an enlarged view of a portion (a) in FIG. 1 of the rotation sensor of the present invention.

FIG. 5 is an enlarged view of a main part when the rotation sensor of the present invention is used.

FIG. 6 is an explanatory view showing constituent members of a conventional rotation sensor.

FIG. 7 is a sectional view of a conventional rotation sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 ... Housing 22 ... Connector member fitting part 23 ... Mounting screw hole 24 ... Center shaft hole 25 ... Bearing fitting part 26 ... Coupling shaft penetration part 27 ... Receiving step part 28 ... Notch part for lubrication 29 ... Packing fitting groove 30 … Lubricating nozzle

Claims (3)

[Claims] 1. A coupling shaft insertion hole is formed inside a housing made of a non-magnetic material, a coupling shaft integrally connected to a rotating magnet is inserted into the coupling insertion hole, and A plurality of washers are then inserted from the side opposite to the insertion side of the ring shaft, then a pressing plate, and a coil spring are inserted in this order, and the elastic plate of the coil spring is used to release the pressing plate locked to the coupling shaft. A rotation sensor that presses against the formed end face of the coupling shaft insertion hole formed in the housing via a plurality of washers and regulates the thrust of the coupling shaft in the thrust direction; At an appropriate position on the inner peripheral surface of the coupling shaft insertion hole, a cutout portion for lubricating oil for injecting lubricating oil from the outside of the housing toward the washer is formed. A rotation sensor. 2. The rotation sensor according to claim 1, wherein a part of the lubrication notch is closed by the washer. 3. The rotation sensor according to claim 1, wherein the lubricating oil is grease, and is attached to a peripheral surface of the washer.