JPH0592472U - Rotation angle detector - Google Patents

Abstract

(57) [Summary] [Purpose] The object is to obtain a rotation angle detection device that is easy to install, has a small amount of play and has high detection accuracy. [Structure] A round hole 12 through which a screw penetrates is formed in one side of a base 8 of a Hall effect sensor device 3, and an elongated hole 11 through which a screw penetrates is formed in the other side of the base 8.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotation angle detecting device used for detecting a crank angle in an internal combustion engine.

[0002]

[Prior Art]

 2 (a) is a cross-sectional view of a main part of the internal combustion engine, FIG. 2 (b) is a front view of the rotation angle detection device of FIG. 2 (a), 1 is an engine block, and 2 is an engine block 1 A crankshaft, 3 is a Hall effect type sensor device which is a rotation angle detecting device fixed to the engine block 1, 4 is a vane as a magnetic flux shield made of a magnetic material fixed to the crankshaft 2, and 5 is a vane 4 Three protrusions are provided on the outer periphery so that the protrusion 5 can pass through the gap 6. 7 is a crank sprocket. 8 is a base of the Hall effect type sensor device 3, 9 is a round hole formed on both sides of the case 8, and a screw 10 penetrates the round hole 9 and is screwed into a screw hole (not shown) of the engine block 1. It is worn.

In the internal combustion engine having the above-described structure, the rotation of the crankshaft 2 causes the vane 4 integrated with the crankshaft 2 to rotate, so that the protrusion 5 crosses the gap 6 each time the inside of the hall effect type sensor device is rotated. The magnetic flux passing from the magmet (not shown) in the direction of the arrow toward the hall element (not shown) is blocked by the protrusion 5, and as a result, the change of the magnetic flux is converted into an electric signal by the hall element, and the rotation angle of the crankshaft 2 is changed. To be detected.

[0004]

[Problems to be solved by the device]

 In the conventional Hall effect type sensor device 3, the position of the round hole 9 of the base 8 and the diameter of the round hole 9 must be matched with the screw hole of the engine block 1, which requires high machining accuracy, and If the diameter of the round hole 9 is increased in order to absorb the variation, the mounting position of the Hall effect sensor device 3 on the engine block 1 is not fixed and there is a problem that the detection accuracy of the rotation angle decreases. . The present invention has been made in order to solve the above problems, and an object thereof is to obtain a rotation angle detection device that is easy to install and has less play.

[0005]

[Means for Solving the Problems]

 In the rotation angle detecting device according to the present invention, a round hole through which a screw penetrates is formed in one of the bases, and a long hole through which the screw penetrates is formed in the other base.

[0006]

[Action]

 In this invention, the mounting reference position of the base with respect to the mounted portion is determined by the round hole, and the variation in the pitch of the screw hole is absorbed by the elongated hole.

[0007]

【Example】

 Example 1. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an embodiment of the present invention, in which the same or corresponding parts as in FIG. 2 are designated by the same reference numerals, and the description thereof will be omitted. In the figure, 11 is a long hole formed at one end of the base 8 and 12 is a round hole formed at the other end of the base 4.

In the above-mentioned Hall-effect sensor device, when mounting the base 8 to the engine block 1 that is the mounted portion, first the round hole 12 and one screw hole are aligned and the screw 10 is used. The base 8 is screwed to the engine block 1, then the slot 11 and the other screw hole are aligned with each other, and the screw 8 is used to screw the base 8 to the engine block 1.

Example 2. Although the Hall effect type sensor device has been described as the rotation angle detecting device in the above embodiment, the invention can be applied to an optical type sensor device as a matter of course. Further, the present invention can be applied to a Hall effect type sensor device which is attached to a distributor which is an attached part. Furthermore, the present invention can be applied to the case of mounting an oil pump case that forcibly circulates the engine lubricating oil.

[0010]

[Effect of the device]

 As described above, according to the rotation angle detecting device of the present invention, a round hole through which a screw penetrates is formed in one side of the base, and a slot through which a screw penetrates is formed in the other side of the base. The base mounting position for the base is determined by the round hole, and the variation in the pitch of the screw hole is absorbed by the long hole.Therefore, the height of the screw hole of the mounted part, the round hole of the base, and the long hole Even if it does not require the processing accuracy of 1., the base can be fixed to the mounted part without rattling, and the detection accuracy is improved.

[Submission date] February 12, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

In the internal combustion engine having the above-described structure, the vane 4 integrated with the crankshaft 2 rotates due to the rotation of the crankshaft 2, and every time the protrusion 5 crosses the gap 6, the inside of the hall effect type sensor device. The magnetic flux passing from the magnet (not shown) to the Hall element (not shown) is blocked by the protrusion 5, so that the change in the magnetic flux is converted into an electric signal by the Hall element and the rotation angle of the crankshaft 2 is changed. To be detected.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

[0007]

【Example】

 Example 1. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an embodiment of the present invention, in which the same or corresponding parts as in FIG. 2 are designated by the same reference numerals, and the description thereof will be omitted. In the figure, 11 is a long hole formed at one end of the base 8, and 12 is a round hole formed at the other end of the base 8.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

Example 2. In the above embodiment, the Hall effect type sensor device has been described as the rotation angle detecting device, but it goes without saying that the present invention can be applied to an optical type sensor device. Further, the present invention can be applied to a Hall effect type sensor device which is attached to a distributor which is an attached part.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2A is a side view showing an example of a conventional Hall effect sensor device, and FIG. 2B is a front view of the Hall effect sensor device shown in FIG.

[Explanation of symbols]

 1 Engine block (attached part) 3 Hall effect type sensor device (rotation angle detection device) 8 Base 11 Oblong hole 12 Round hole

Claims (1)

[Scope of utility model registration request] 1. A rotation angle detecting device for detecting a crank angle of an internal combustion engine, comprising: a base attached to a mounted portion by a screw; and a round hole through which the screw penetrates is formed in one of the bases. A rotation angle detecting device, characterized in that an elongated hole through which the screw penetrates is formed on the other side.