JP6570028B2 - Rotation angle detector - Google Patents

Description

  The present invention relates to a rotation angle detection device that detects a rotation angle of a rotation body that is pivotally supported by a support body via a pivot pin.

  2. Description of the Related Art Conventionally, a working device provided in a working machine such as a hydraulic excavator has a boom cylinder, a stick cylinder, and a bucket cylinder, each of which is a fluid pressure actuator. It is designed to rotate by extending and contracting. In this working device, a boom and a boom cylinder are pivotally supported by a pivot frame of the machine body via pivot pins so as to be rotatable.

  2. Description of the Related Art In recent years, for example, for the purpose of grasping the position of the bucket tip of a working device, there is a system that detects angles of an airframe and a boom, a boom and a stick, and a stick and a bucket by an angle sensor. In order to improve the detection accuracy of the bucket tip position, it is indispensable to detect the exact rotation angle of each part. To that end, the axis line of the rotation shaft for detection of the angle sensor and the axis line of the support pin are possible As much as possible, it is required to improve the accuracy of so-called axial alignment, which is arranged on the same line.

  Therefore, a stopper provided with a reference hole is fixed to a support bracket having a fitting hole for fitting the angle sensor so that the reference hole is coaxial with the fitting hole. When mounting to a boom that is inserted into the support bracket, the centering pin inserted through the reference hole and the fitting hole is inserted into the hole provided along the axis of the pivot pin and aligned with the support bracket. A mounting base is attached to a support body through which a shaft support pin is inserted, and an angle sensor is attached to the mounting base so that the shaft support pin and the angle sensor are connected to the axis. The structure that has been taken out is known (for example, see Patent Document 2).

  However, since the pivot pin needs to have a backlash in consideration of deformation of a structure such as a boom or a support body through which the pivot pin is inserted, the pivot pin is inserted as in each of the above configurations. If the angle sensor is attached to the structure to be formed, the accuracy of alignment between the pivot pin and the angle sensor cannot be ensured.

  In this regard, a sensor seat with an opening is attached to the mounting seat that protrudes like a bowl from the shaft support pin, the shaft support pin and the opening are aligned, and an angle sensor is attached to this opening to support the shaft. A configuration in which a pin and an angle sensor are centered is known (for example, see Patent Document 3).

  However, in this configuration, since the mounting seat is provided on the shaft support pin itself, the shaft support pin needs to be processed with high accuracy, and the processing cost is increased.

Japanese Utility Model Publication No. 63-172906 JP 2002-266364 A JP2011-168999A

  As described above, there is a demand for a rotation angle detection device that can align the shaft support pin and the angle sensor with high accuracy and can be configured at low cost.

  The present invention has been made in view of these points, and an object of the present invention is to provide a rotation angle detection device that can align a pivot pin and an angle sensor with high accuracy and can be configured at low cost.

The invention according to claim 1 is a rotation angle detecting device for detecting a rotation angle of a rotating body pivotally supported on a support via a pivot pin, and one end side of the pivot pin is inserted. One mounting member provided with an insertion hole and a fixing portion and aligned with the pivot pin by insertion of one end side of the pivot pin into the insertion hole, an exposed hole provided through, and A fixing portion that is fixed to the fixing portion, and the other fixing member that opposes the one mounting member at a position spaced from the shaft support pin in a state in which the fixing portion is fixed to the fixing portion; through the exposure holes other fixed on exposure hole coaxially against the mounting member into the insertion hole inserted through the pivotally supported pin facing coaxially, it is connected with the rotating member rotation angle of the rotary body A rotation angle detection device including an angle sensor for detecting the rotation angle.

  According to a second aspect of the present invention, the fixing portion in the rotation angle detecting device according to the first aspect is a pair of boss portions arranged at positions opposite to each other with respect to the insertion hole, and the fixed portion is A round hole that is inserted through the bolt and fastened to one of the bosses, and a long hole that is formed in a longitudinal shape toward the round hole and is fastened to the other boss through the bolt. The rotation angle detecting device.

  According to a third aspect of the present invention, in the rotation angle detecting device according to the second aspect of the present invention, the rotation angle detecting device includes a receiving portion that is provided on the support and prevents the pivot pin from rotating, and the other mounting member is loosely fitted with a bolt. It is a rotation angle detection apparatus provided with the hole part fastened together by a receiving part.

According to the first aspect of the present invention, it is coaxial with the exposure hole with respect to the fixing portion of one mounting member that is aligned with the pivot pin by inserting one end side of the pivot pin into the insertion hole. Since the fixed portion of the other mounting member that fixed the rotation angle detection device is fixed to the rotation angle detection device, the rotation angle detection device is opposed to the shaft support pin inserted through the insertion hole on the same axis through the exposure hole . By accurately forming the insertion hole of one mounting member with respect to the pivot pin and accurately forming the fixed portion of the other mounting member, the angle can be adjusted regardless of the back pin of the support pin. The sensor can be aligned with respect to the pivot pin with high accuracy. Also, basically only the insertion hole of one mounting member and the fixed part of the other mounting member need to be formed with high precision, so that for example, no processing is required on the shaft support pin or the support body, and the structure is inexpensive it can.

  According to the second aspect of the present invention, as the fixing portion of one mounting member, a boss portion that is paired at a position opposite to each other with respect to the insertion hole is arranged, and as a fixed portion of the other mounting member, a bolt is used. A round hole is formed with high accuracy by setting a round hole that is fastened to one boss part and a long hole that is long toward the round hole and fastened to the other boss part by a bolt. Thus, the other mounting member can be aligned with respect to the one mounting member with high accuracy, and the angle of the other mounting member can be determined by aligning the elongated hole with the other boss portion. Therefore, since the position and angle of the other mounting member for fixing the angle sensor can be accurately aligned with the one mounting member with reference to the round hole and the long hole, the angle sensor can be easily adjusted with respect to the shaft support pin. Can be aligned with high accuracy.

  According to the third aspect of the present invention, the other mounting member is attached to the angle sensor by fastening the hole of the other mounting member loosely fitting the bolt to the receiving portion that prevents the pivot pin from rotating. And can be securely fixed to the support while maintaining the positional accuracy of the shaft support pin.

It is a perspective view which shows one Embodiment of the rotation angle detection apparatus which concerns on this invention. (a) is II sectional drawing of FIG. 1, (b) is II-II sectional drawing of FIG. FIG. 8 is a view taken in the direction of arrow III in FIG. 7. (a) is a front view of one mounting member of the same rotation angle detecting device, and (b) is a side view of one mounting member. (a) is a front view of another attachment member of the same rotation angle detection device, and (b) is a side view of the other attachment member. (a) is a front view of a pivot pin to which the same rotation angle detector is attached, and (b) is a side view of the pivot pin. It is a top view of the support body which mounts a rotation angle detection apparatus same as the above. It is a side view of the working machine which has a rotation angle detection apparatus same as the above.

  Hereinafter, the present invention will be described in detail based on one embodiment shown in FIGS.

  As shown in FIG. 8, a hydraulic excavator 11 as a work machine includes a crawler-type lower traveling body 12, and an upper revolving body 14 provided on the lower traveling body 12 so as to be capable of swiveling via a swivel bearing portion 13. And a working device 15 provided on the upper swing body 14. A cab 16 is mounted on the front side of the upper swing body 14, and a machine room 17 such as an engine and a counterweight 18 are mounted on the rear side.

  The upper revolving body 14 includes a revolving frame 21 as a support shown in FIG. 7, and this revolving frame 21 extends in the horizontal direction from the support portion 22 that is supported by the revolving bearing portion 13 (FIG. 8). A center frame 23 as a support portion is provided so as to be oriented. The center frame 23 has a pair of center frames 23A and 23B. A plurality of skirt beams 25 that support the load of a load such as a fuel tank or a hydraulic oil tank are welded to the side surfaces of the center frames 23A and 23B. Further, the revolving frame 21 includes a cab mounting portion 27 for supporting the cab 16 (FIG. 8), an engine mounting portion 28 for supporting an engine (not shown), a counter weight mounting portion 29 for mounting a counterweight 18 (FIG. 8), and a skirt beam. A peripheral skirt portion 30 provided at the tip of 25 or the like is provided.

  The center frames 23A and 23B are formed so that the position located in the vicinity of the support portion 22 serving as the turning center is the highest, and the distance from the support portion 22 or the vicinity of the support portion 22 in the longitudinal direction increases, that is, in front of the body and The shape changes so that the height decreases as it goes backward. The center frame 23A, 23B has a boom foot pin mounting hole 31 opened at a position closer to the front of the machine body having the highest height (a position in front of the support portion 22). A boom cylinder mounting hole 32 as a shaft support hole is opened at a position in front of the hole 31 along the width direction of the airframe.

  8 includes a boom foot pin mounting hole 31 and a boom cylinder mounting hole 32 (FIG. 7) in which a boom 33 and a boom cylinder 34 as a rotating body that rotates the boom 33 are not shown. It is pivotally supported via a boom cylinder foot pin 36 (FIGS. 1 and 6, etc.) as a foot pin and a pivot pin (linkage pin), and the stick 37 is rotated by the stick cylinder 38 at the tip of the boom 33. The bucket 39 is pivotally supported at the tip of the stick 37 so as to be rotated by the bucket cylinder 40. In the present embodiment, the boom cylinder 34 is attached to the boom cylinder attachment holes 32 (FIG. 7) of the center frames 23A and 23B (FIG. 7). In other words, in the present embodiment, the boom cylinder 34 is located on the left and right of the boom 33 with the boom 33 interposed therebetween. As shown in FIG. 1, a rotation angle detection device 41 for detecting the rotation angle of the boom cylinder 34 is attached to the rotation frame 21 (center frame 23) at the position of the boom cylinder foot pin 36. .

  A boom cylinder foot pin 36 shown in FIGS. 6 (a) and 6 (b) includes a foot pin body 42 as a cylindrical shaft support pin body, and a pin bracket 43 integrally welded to the foot pin body 42. It has. The foot pin main body 42 is a portion that is inserted into the boom cylinder mounting hole 32 (FIG. 3 and the like) and slightly slackened with respect to the boom cylinder mounting hole 32 in consideration of deformation of the turning frame 21 (center frame 23). Have (play). That is, the foot pin main body 42 is loosely fitted into the boom cylinder mounting hole 32. Further, the pin bracket 43 is a portion located on the side of the center frame 23 (opposite to the boom cylinder 34 with respect to the center frame 23) and faces the rotation angle detection device 41, and the foot pin main body 42 is attached to the pin bracket 43. A round hole-shaped mounting hole 45 and a long hole-shaped (oval (elliptical) -shaped) non-rotating hole 46 for preventing the boom cylinder foot pin 36 from rotating with respect to the turning frame 21 (center frame 23) are thick. It is provided penetrating in the direction.

  The rotation angle detection device 41 includes a first plate 51 as one attachment member attached to the boom cylinder foot pin 36 and a first attachment member as another attachment member fixed to the first plate 51. Two plates 52 and an angle sensor 53 fixed to the second plate 52 are provided.

  The first plate 51 shown in FIGS. 1, 2 (a), 2 (b), 4 (a), and 4 (b) is attached to the boom cylinder foot pin 36 and pivoted. The frame 21 (center frame 23) is overlaid on the side surface opposite to the boom cylinder 34. The first plate 51 includes a first plate body 55 as a mounting member body formed in a flat plate shape, an insertion hole 56 that penetrates the first plate body 55 in the thickness direction, and the first plate body 55. And a boss portion 57 as a fixed portion projecting from one main surface. The first plate 51 (first plate body 55) has a substantially line-symmetric shape with respect to an imaginary line L1 passing through the center of the insertion hole 56.

  The first plate main body 55 is formed by integrating a substantially circular main body portion 55a and projecting portions 55b and 55b projecting so as to gradually narrow from both sides of the main body portion 55a (both sides of the imaginary line L1). I have. An insertion hole 56 is opened in the main body portion 55a, and a boss portion 57 is protruded from the projecting portions 55b and 55b.

  The insertion hole 56 is used to position the first plate 51 with high accuracy with respect to the boom cylinder foot pin 36 by inserting and fitting one end of the boom cylinder foot pin 36 (foot pin main body 42). is there. The diameter of the insertion hole 56 is set slightly larger than the diameter of the boom cylinder foot pin 36 (foot pin main body 42) with a good dimensional accuracy. The boom cylinder foot pin inserted through the insertion hole 56 The position of the boss portion 57 is set with high accuracy with respect to the axis A1 of 36 (foot pin main body 42). Therefore, the inner peripheral surface of the insertion hole 56 is substantially in close contact with the outer peripheral surface of the boom cylinder foot pin 36 (foot pin main body 42) with substantially no gap. That is, the inner peripheral surface of the insertion hole 56 is opposed to the outer peripheral surface of the boom cylinder foot pin 36 (foot pin main body 42) with a gap smaller than the boom cylinder mounting hole 32.

  In the boss portion 57, boss portions 57A and 57B (one and the other) are set. These boss portions 57A and 57B are arranged at positions opposite to each other with respect to the center of the insertion hole 56 (virtual line L1), and the distances from the center of the insertion hole 56 (virtual line L1) are substantially equal to each other. Is set. That is, the boss portion 57 (the boss portions 57A and 57B) is positioned substantially symmetrical with respect to the virtual line L1 passing through the center of the insertion hole 56.

  The second plate 52 shown in FIG. 1, FIG. 2 (a), FIG. 2 (b), FIG. 5 (a) and FIG. 5 (b) is a second mounting member body formed as a flat plate. The plate main body 61 is provided with a fixed portion 62, a hole 63, and an exposure hole 64 that penetrate the second plate main body 61 in the thickness direction. The second plate 52 is fixed to the first plate 51 by fixing the fixed portion 62 to the boss portion 57 (boss portions 57A and 57B) with bolts 66 and 67, and the boom cylinder foot pin. The one end side of 36 is spaced apart and opposed to the side opposite to the boom cylinder 34.

  The second plate main body 61 includes a substantially circular main body portion 61a, projecting portions 61b and 61b projecting gradually from both sides of the main body portion 61a, and projecting portions 61b and 61b from one end of the main body portion 61a. An extending portion 61c protruding in a direction intersecting (orthogonal) with 61b is integrally provided. An exposure hole 64 is opened in the main body 61a, a fixed portion 62 is opened in the projecting portions 61b and 61b, and a hole 63 is opened in the extending portion 61c. The second plate body 61 has a substantially line-symmetric shape with respect to an imaginary line L2 passing through the centers of the hole 63 and the exposure hole 64.

  The fixed portion 62 includes a round hole 62A and a long hole 62B. The round hole 62A and the elongated hole 62B are arranged at positions opposite to each other with respect to the center of the exposure hole 64 (imaginary line L2), and the distance from the center of the exposure hole 64 (imaginary line L2) is They are set substantially equal to each other.

  The round hole 62A is fastened together with the boss portion 57 (boss portion 57A) by a bolt 66, so that the second plate 52 is fixed to the first plate 51 with high accuracy. belongs to. The round hole 62A has a diameter that is, for example, about 0.2 mm larger than the diameter of the bolt 66, and is formed with good dimensional accuracy.

  The elongated hole 62B is for fixing the angle of the second plate 52 to the first plate 51 by being fastened and fixed to the boss portion 57 (boss portion 57B) with a bolt 67. The long hole 62B is formed in an oval shape (or an elliptical shape) having a short diameter equivalent to that of the round hole 62A and a long diameter larger than the short diameter, and the long axis direction is the round hole 62A and the exposed hole 64. It extends in the direction, in other words, the direction intersecting (orthogonal) with the virtual line L2. Therefore, the long hole 62B is formed in a longitudinal shape toward the round hole 62A and the exposure hole 64.

  The hole 63 is for fixing the second plate 52 to the revolving frame 21 (center frame 23), and is formed in a circular shape having a larger opening than the fixed part 62 (round hole 62A and long hole 62B). A clearance hole (fool hole) into which the bolt 68 is loosely fitted. The hole 63 is opposed to a receiving part 69 projecting behind the boom cylinder mounting hole 32 on the side surface of the turning frame 21 (center frame 23), and is fastened together with a bolt 68 to the receiving part 69. Thus, the second plate 52 is fixed to the revolving frame 21 (center frame 23). Here, the receiving portion 69 is used to prevent the boom cylinder foot pin 36 from rotating around the revolving frame 21 (center frame 23), is formed in a boss shape, and is opened to the pin bracket 43 of the boom cylinder foot pin 36. The rotation stop hole 46 is inserted. Further, a flange portion 69a that protrudes in a flange shape is provided at the distal end portion of the receiving portion 69, and this flange portion 69a is a turning frame 21 (center frame 23) of the second plate 52 (second plate body 61). ) Side main surface and in close contact with the position around the hole 63.

  The exposure hole 64 is a part that makes the angle sensor 53 face the boom cylinder foot pin 36, and is formed in a circular shape having a diameter larger than that of the hole part 63. The exposure hole 64 is arranged substantially coaxially with the insertion hole 56 of the first plate 51 in a state where the second plate 52 is fixed to the first plate 51.

  The angle sensor 53 shown in FIGS. 1, 2 (a), and 2 (b) is fixed to the second plate 52 and coaxial with the boom cylinder foot pin 36 inserted through the insertion hole 56 of the first plate 51. It faces the upper side and is connected to the boom cylinder 34 to detect the rotation angle of the boom cylinder 34. The angle sensor 53 is a potentiometer, for example, and includes an angle sensor main body 71 formed in a disk shape and a lever 72 protruding from the angle sensor main body 71. Then, the angle sensor main body 71 is integrally fixed to the second plate 52 through a bolt (not shown) at a position facing the exposure hole 64, and the tip of the lever 72 is connected to the side of the boom cylinder 34. ing. That is, the axis A2 of the angle sensor 53 (angle sensor body 71) is substantially coaxial with the axis A1 of the boom cylinder foot pin 36.

  Next, the mounting operation of the rotation angle detection device 41 of the illustrated embodiment will be described.

  When the lower end of the boom cylinder 34 is pivotally supported by the boom cylinder foot pin 36 with respect to the boom cylinder mounting hole 32 of the center frame 23 of the revolving frame 21, the boom cylinder foot pin 36 is inserted into the insertion hole 56 of the first plate 51. The foot pin main body 42 is inserted. At this time, the insertion hole 56 is formed with good dimensional accuracy with respect to the diameter dimension of the foot pin body 42 of the boom cylinder foot pin 36, so that the first plate 51 is accurately positioned with respect to the boom cylinder foot pin 36. To be combined. In this state, the boom cylinder foot pin 36 has the pin bracket 43 overlapped with the first plate 51, and the first plate 51 is sandwiched between the turning frame 21 (center frame 23) and the pin bracket 43. The pin bracket 43 is temporarily prevented from rotating with respect to the turning frame 21 (center frame 23) by inserting the receiving portion 69 through the rotation stop hole 46.

  Next, the angle sensor 53 (angle sensor body 71) is fixed to the second plate 52 so as to face the exposure hole 64. As described above, the second plate 52 and the angle sensor 53 are fixed separately from the first plate 51 and the turning frame 21 (center frame 23), so that the angle sensor 53 (angle sensor main body 71) is fixed. The angle sensor 53 (the angle sensor body 71) can be attached to the second plate 52 with high accuracy without aligning the axis A2 with the center of the exposure hole 64.

  Thereafter, the second plate 52 to which the angle sensor 53 (angle sensor body 71) is fixed is fixed to the first plate 51 by bolts 66 and 67, and the receiving portion 69 (the turning frame 21 (center frame 23)) is fixed. On the other hand, it is fixed with bolts 68. At this time, the second plate 52 first inserts the bolt 66 after aligning the round hole 62A of the fixed portion 62 with the boss portion 57A of the first plate 51, and then inserts this bolt 66 (round hole 62A). While rotating the second plate 52 around the center, the elongated hole 62B of the fixed portion 62 is aligned with the boss portion 57B of the first plate 51, the bolt 67 is inserted, and the bolts 66 and 67 are tightened. That is, in the second plate 52, since the round hole 62A is formed with good dimensional accuracy with respect to the diameter dimension of the bolt 66, the bolt 66 inserted into the round hole 62A can be inserted into the boss portion 57A. The round hole 62A of the second plate 52 is accurately aligned with the boss portion 57A of the first plate 51, and the elongated hole 62B has an oval shape. The angle of the plate 52 is aligned with high accuracy. Accordingly, the position and angle of the second plate 52 with respect to the first plate 51 are determined with reference to the round hole 62A and the elongated hole 62B, and the angle that is spaced from the boom cylinder foot pin 36 and faces the exposure hole 64. The axis A2 of the sensor 53 (angle sensor body 71) and the axis A1 of the boom cylinder foot pin 36 are positioned substantially coaxially. The second plate 52 is fixed to the turning frame 21 (center frame 23) by inserting and tightening the bolt 68 into the hole 63 facing the receiving portion 69, and the boom cylinder foot pin 36 is attached to the turning frame. Locks against 21 (center frame 23).

  Further, the lever 72 of the angle sensor 53 is fixed to the side of the boom cylinder 34 using a bolt or the like (not shown). As a result, the rotation angle detection device 41 is attached to the airframe.

  Then, the rotation angle detection device 41 attached in this way allows the lever 72 connected to the boom cylinder 34 to rotate integrally with the rotation of the boom cylinder 34 so that the angle sensor 53 A signal corresponding to the rotation angle is generated in the angle sensor main body 71, and this signal is output to, for example, a controller (not shown) via an amplifier circuit (not shown) to detect the rotation angle.

  As described above, according to the above-described embodiment, the second plate that fixes the angle sensor 53 to the boss portion 57 of the first plate 51 that is inserted through the insertion hole 56 at one end side of the boom cylinder foot pin 36. Since the rotation angle detecting device 41 is attached by fixing the fixed portion 62 of the 52, the insertion hole 56 of the first plate 51 is accurately formed with respect to the boom cylinder foot pin 36, and the second plate 52 is fixed. By forming the fixing part 62 (round hole 62A) with high accuracy, the angle sensor 53 can be connected to the boom cylinder foot regardless of the boom cylinder foot pin 36 against the boom cylinder mounting hole 32 of the swing frame 21 (center frame 23). The pin 36 can be aligned with high accuracy. Further, basically, only the insertion hole 56 of the first plate 51 and the fixed portion 62 (round hole 62A) of the second plate 52 need only be formed with high accuracy, that is, if only the accuracy of the so-called child component is increased. Therefore, for example, the boom cylinder foot pin 36 and the turning frame 21 (center frame 23) need not be processed, and can be configured at low cost.

  In addition, boss portions 57A and 57B that are paired at positions opposite to each other with respect to the insertion hole 56 are disposed as fixing portions of the first plate 51, and one of the fixed portions 62 of the second plate 52 is secured by a bolt 66. By setting a round hole 62A that is fastened to the boss portion 57A and a long hole 62B that is elongated toward the round hole 62A and is fastened to the other boss portion 57B by a bolt 67, the round hole 62A is The second plate 52 can be aligned with the first plate 51 with high accuracy by forming with high accuracy, and the angle of the second plate 52 is determined by aligning the elongated hole 62B with the other boss portion 57B. be able to. Therefore, the position and angle of the second plate 52 for fixing the angle sensor 53 can be accurately matched with the first plate 51 with the round hole 62A and the elongated hole 62B as a reference. It can be easily aligned with 36 with high accuracy.

  Further, by tightening the hole 63 of the second plate 52 in which the bolt 68 is loosely fitted to the receiving portion 69 of the turning frame 21 (center frame 23) that prevents the boom cylinder foot pin 36 from rotating, The plate 52 can be reliably fixed to the turning frame 21 (center frame 23) while maintaining the positional accuracy of the angle sensor 53 and the boom cylinder foot pin 36.

  By providing the rotation angle detection device 41 in a work machine such as the hydraulic excavator 11, a system that can detect the rotation angle of the boom cylinder 34 with high accuracy can be configured at low cost. It is possible to improve the accuracy when performing detection or performing posture (motion) control of the work device 15.

  In the above embodiment, the rotation angle detection device 41 is provided to detect the rotation angle of the boom cylinder 34. For example, the boom 33, the stick 37, the stick cylinder 38, and the bucket 39 of the work device 15 are provided. Alternatively, at least one rotation angle of the bucket cylinder 40 or the like can be detected. That is, the rotation angle detection device 41 is not limited to the work device of the work machine, and can be provided to detect the rotation angle of an arbitrary rotation body.

  The present invention can be used by business operators involved in the manufacture of work machines including rotating bodies such as hydraulic excavators and cranes.

21 Swivel frame as support
34 Boom cylinder as a rotating body
36 Boom cylinder foot pin as a pivot pin
41 Rotation angle detector
51 First plate as one mounting member
52 Second plate as other mounting member
53 Angle sensor
56 Insertion hole
57 Boss as fixed part
62 Fixed part
62A round hole
62B oblong hole
63 hole
64 exposed holes
66, 67, 68 volts
69 Receiver

Claims (3)

A rotation angle detecting device for detecting a rotation angle of a rotating body pivotally supported on a support via a pivot pin;
One mounting member provided with an insertion hole through which one end side of the pivot pin is inserted, and a fixing portion, and aligned with the pivot pin by insertion of one end side of the pivot pin into the insertion hole;
It has an exposed hole provided through and a fixed portion fixed to the fixed portion, and the fixed portion is fixed to the fixed portion, and is fixed at a position separated from the pivot pin. Another mounting member facing the mounting member;
Through the exposure holes Other fixed on exposure hole coaxially against the mounting member into the insertion hole inserted through the pivotally supported pin facing coaxially, it is connected with the rotating member rotation angle of the rotary body A rotation angle detection device comprising: an angle sensor for detecting the rotation angle. The fixing portion is a pair of boss portions respectively arranged at positions opposite to each other with respect to the insertion hole,
The fixed part is
A round hole where a bolt is inserted and fastened to one boss part;
The rotation angle detecting device according to claim 1, further comprising: a long hole formed in a longitudinal shape toward the round hole, through which a bolt is inserted and fastened to the other boss portion. Provided with a receiving part that is provided on the support and prevents the pivot pin from rotating,
The rotation angle detecting device according to claim 2, wherein the other mounting member includes a hole portion in which a bolt is loosely fitted and fastened to the receiving portion.

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