JP7196898B2 - Stroke sensor module, mounting structure of stroke sensor module, and mounting method of stroke sensor module - Google Patents

Description

The present invention relates to a stroke sensor module, a mounting structure for the stroke sensor module, and a method for mounting the stroke sensor module.

A stroke sensor is known that measures the displacement of a member that moves linearly, such as the amount of depression of an automobile brake pedal or accelerator pedal. Patent Literature 1 discloses a range detection device including a movable portion slidable along a fixed portion and a Hall element attached to the fixed portion. The movable part incorporates a magnet and can move in conjunction with the shift lever. The Hall element detects the magnetic field that changes with the displacement of the movable portion, so that the displacement of the movable portion, that is, the displacement of the shift lever can be detected. The fixed part is supported by the valve body. The fixed part is provided with a rod-shaped positioning part and a hole, and the valve body is formed with a recess for receiving the positioning part and a screw hole. The fixing part is fixed to the valve body by inserting the bolt through the hole of the fixing part and engaging the screw hole. At this time, the fixing portion is positioned with respect to the valve body by inserting the positioning portion into the recess. The recess is provided at the corner of the valve body.

JP 2008-121786 A

There are various shapes of the supporting portion to which the stroke sensor is attached, and there are cases where the positioning portion disclosed in Patent Document 1 cannot be provided.

An object of the present invention is to provide a stroke sensor module that can be easily positioned.

The present invention relates to a stroke sensor module attached to a support having a through hole and a positioning portion. The stroke sensor module includes a moving body that moves in a first direction, a magnetic field generator that moves in the first direction in association with the moving body, a magnetic detection element that detects the movement of the magnetic field generating body, and a moving body. and a storage body for storing the part and the magnetism generator. The container includes an insertion portion that is inserted through the through hole and fitted with the through hole, a mounting portion that is fixed to the mounting surface of the support portion, and a fitting portion that is fitted with the positioning portion to position the container in the first direction. and Viewed from the first direction, the mounting portion and the mating portion are at different angular positions.

According to the present invention, it is possible to provide a stroke sensor module that can be easily positioned.

1 is a perspective view of a stroke sensor module according to a first embodiment of the invention; FIG. 2 is a side view of the stroke sensor module shown in FIG. 1; FIG. FIG. 2 is a cross-sectional view of the stroke sensor module shown in FIG. 1; It is an outline drawing of a magnetism generator. 4 is an outline drawing of a moving body; FIG. FIG. 5 is a cross-sectional view of a stroke sensor module according to a modification of the first embodiment; FIG. 10 illustrates a stroke sensor module according to a second embodiment of the invention; FIG. 11 shows a stroke sensor module according to a third embodiment of the invention; FIG. 10 is a diagram showing a stroke sensor module according to a fourth embodiment of the invention; FIG. 10 is a diagram showing a stroke sensor module according to a fifth embodiment of the invention; 4 is a perspective view of a stroke sensor module and a support; FIG. It is a figure which shows the problem when there are no positioning part and a fitting part. It is a figure which shows the attachment method of a stroke sensor module. FIG. 10 is a diagram showing a storage body for a stroke sensor module according to a first modified example; FIG. 10 is a diagram showing a storage body for a stroke sensor module according to a first modified example; FIG. 10 is a diagram showing a storage body for a stroke sensor module according to a first modified example; FIG. 10 is a diagram showing a storage body for a stroke sensor module according to a second modified example; FIG. 11 is a diagram showing a storage body for a stroke sensor module according to a third modified example; FIG. 11 is a diagram showing a storage body for a stroke sensor module according to a fourth modified example;

Several embodiments of the present invention will be described with reference to the drawings. In each embodiment, the direction in which the moving body 5 moves is the X direction (first direction). The direction in which the moving body 5 pushes the magnetism generator 2 is called the +X direction, and the opposite direction is called the -X direction. The direction perpendicular to the X direction and parallel to the mounting surface of the stroke sensor module 1 is defined as the Y direction, and the direction perpendicular to the X and Y directions, that is, the direction perpendicular to the mounting surface is defined as the Z direction.

(First embodiment)
FIG. 1(a) shows an overall perspective view of the stroke sensor module 1, and FIG. 1(b) shows an exploded perspective view of the stroke sensor module 1. As shown in FIG. 2(a) is a side view of the stroke sensor module 1 viewed from the moving body 5 side, and FIG. 2(b) is a side view of the stroke sensor module 1 viewed from the cover member 9 side (however, the cover member 9 and the inner structure not shown). FIG. 3(a) shows a cross-sectional view of the stroke sensor module 1, and FIG. 3(b) shows a cross-sectional view taken along line AA in FIG. 3(a). The stroke sensor module 1 includes a magnetism generator 2 that generates magnetism, a magnetism detection element 3 that detects the movement of the magnetism generator 2, a container 4 that accommodates these elements, and a magnetism generator 2 that moves in the X direction. and a moving body 5 that moves to The stroke sensor module 1 is attached to a mounting surface parallel to the XY plane by a mounting portion 49 provided in the housing 4 . These parts will be described in detail below.

4(a) is a perspective view of the magnetism generator 2, FIG. 4(b) is a side view of the magnetism generator 2 viewed from direction A in FIG. 4(a), and FIG. ), and FIG. 4(d) shows a front view of the magnetism generator 2 viewed from direction C in FIG. 4(a). The magnetism generator 2 has a generally cylindrical main body 21 elongated in the X direction and a plate-like base 22 extending in the X direction along the main body 21 . The body portion 21 is made of resin except for the magnet 25 and the yoke 26 . The body portion 21 can move in the +X direction and the -X direction by means of a moving body 5 and a spring member 8, which will be described later. The main body 21 has two magnets 25 on both sides in the X direction. The polarities of the surfaces of the two magnets 25 facing the magnetic detection element 3 are different from each other. Therefore, as shown in FIG. 3( a ), a substantially sinusoidal magnetic flux is generated between the two magnets 25 . The two magnets 25 are supported by a yoke 26 made of soft magnetic material. Yoke 26 increases the strength of the magnetic field generated by magnet 25 . The base portion 22 extends from one end of the body portion 21 to the other end in the X direction. The base 22 (and first projections 23 to be described later) are provided on the top and bottom of the main body 21 . That is, when the top portion is 0 degrees when viewed from the X direction, the base portion 22 (and the first protrusion 23) is provided at an angular position θ of 0 degree and an angular position θ of 180 degrees (definition of angular position θ see FIG. 4(b)). The number and installation position of the base 22 (and the first projection 23) are not limited to this. For example, base 22 (and first protrusion 23) may be placed at angular positions θ of 90 degrees and 270 degrees. More than two bases 22 can also be provided. In that case, the bases 22 (and the first protrusions 23) are preferably arranged at even angular intervals. For example, three bases 22 (and first protrusions 23) can be provided at 120 degree intervals.

A plurality of first protrusions 23 are formed on the top of the base 22 . By providing the base portion 22 , the strength of the first protrusion 23 is improved compared to the case of providing a protrusion projecting long from the main body portion 21 . The first protrusions 23 are formed on both ends of the base portion 22 in the X direction. Therefore, the magnetism generator 2 has a total of four first projections 23, some of which are provided at different angular positions θ. By providing the first projections 23 at both ends of the base 22 in the X direction, the movement of the magnetism generator 2 is stabilized. Further, by providing a part of the first projection 23 and another part at different angular positions θ, the magnetism generator 2 is restrained in the Y direction and the Z direction, and the movement of the magnetism generator 2 is stabilized. In particular, in the present embodiment, the first projections 23 are provided at the angular positions θ on opposite sides of the magnetism generator 2, so the magnetism generator 2 can be stabilized with the minimum number of first projections 23. .

All the first projections 23 have the same shape. The first protrusion 23 is a protrusion extending in the Y direction. The first protrusion 23 has a longitudinal or central axis C1 in the Y direction and extends in the Y direction between the two sides of the base 22 . The base portion 22 and the first protrusions 23 are made of resin and formed together with the main body portion 21 by insert molding. The magnets 25 provided at each end of the magnetism generator 2 in the X direction face the corresponding first projections 23 . For example, the first protrusions 23 facing one magnet 25 are positioned on the same straight line extending parallel to the Z direction. Each first projection 23 has curved first end projections 24 at both ends in the direction (Y direction) parallel to the central axis C1.

The storage body 4 has a substantially cylindrical internal space 41 elongated in the X direction, and the magnetic field generator 2 is housed in the internal space 41 . The container 4 is made of resin. A first guide portion 42 for guiding the first protrusion 23 of the magnetism generator 2 is formed at the angular positions θ of 0 degree and 180 degrees in the internal space 41 . The first guide portion 42 is a first groove portion 42 extending in the X direction and accommodating each first protrusion 23 of the magnetism generator 2 . As shown in FIG. 2B, the first groove portion 42 has a T-shaped cross section when viewed in the X direction. The first groove portion 42 has a base accommodating portion 42A connected to the internal space 41 and accommodating the base portion 22, and projection accommodating portions 42B connected to the base accommodating portion 42A and accommodating the first projections 23 on both sides. ing. The base accommodating portion 42A extends in the radial direction (Z direction) from the inner peripheral surface of the internal space 41, and the projection accommodating portion 42B extends in the tangential direction (Y direction) of the internal space 41 from the end portion of the base accommodating portion 42A.

A circular through hole 43 that communicates with the internal space 41 is formed in the X-direction end face of the storage body 4 facing the magnetism generator 2 . The through hole 43 has an inner diameter larger than the outer diameter of the rod 6 of the moving body 5, which will be described later. A spring member 8 made of stainless steel is provided in the inner space 41 on the opposite side of the moving body 5 or the through hole 43 with the magnetism generating body 2 interposed therebetween. The X-direction end face of the container 4 opposite to the through hole 43 is open and closed with a cover member 9 made of resin. The spring member 8 urges the magnetism generator 2 toward the moving body 5 in the -X direction. When assembling the stroke sensor module 1, the moving body 5 is installed in the internal space 41 of the storage body 4 through the opening so that the rod 6 comes out from the through hole 43, and then the magnetism generating body 2 is stored in the internal space 41. Next, the spring member 8 is accommodated in the internal space 41, and finally the opening is closed with the cover member 9. Both ends of the spring member 8 are held by the magnetism generator 2 and the cover member 9 and compressed.

5(a) is an exploded perspective view of the moving body 5, FIG. 5(b) is a perspective view of the connecting portion 7, and FIG. 5(c) is a top view of the moving body 5 and the magnetism generating body 2. . The moving body 5 has a rod-shaped rod 6 connected to a detection target (not shown) and a connecting portion 7 attached to the tip of the rod 6 . The rod 6 is made of stainless steel, and the connecting portion 7 is made of resin, which are integrally formed by insert molding. The through hole 43 has a size that the connecting portion 7 cannot be inserted through, and the connecting portion 7 is held in the internal space 41 . The rod 6 is movably inserted through the through hole 43 . The connecting portion 7 has a base portion 71 attached to the rod 6 and extending in the Y direction, and a pair of arm portions 72 extending in the X direction from both ends of the base portion 71 in the Y direction. The magnetism generator 2 abuts against the base portion 71 by the biasing force of the spring member 8 and is sandwiched between the pair of arm portions 72 . The connecting portion 7 and the magnetism generator 2 are not fixed by means of adhesion or the like, and the magnetism generator 2 only moves in the X direction in conjunction with the movement of the rod 6 .

The connecting portion 7 has a plurality of second protrusions 73 having the same shape as the first protrusions 23 . Four second projections 73 are provided on the upper surface of the connecting portion 7 at the ends of the arms 72 in the X direction and at both ends of the base portion 71 in the Y direction. Two second projections 73 are provided. The second protrusion 73 is a protrusion extending in the Y direction. A second projection 73 provided at the tip of the arm portion 72 has a long axis or central axis C2 in the Y direction and extends between both surfaces of the arm portion 72 in the Y direction. The second protrusions 73 provided at both ends of the base portion 71 in the Y direction also have the same shape as the second protrusions 73 provided at the tip of the arm portion 72 . Each second projection 73 has curved second end projections 74 at both ends in the direction (Y direction) parallel to the central axis C2. The second end projection 74 of the connecting portion 7 also has the same effect as the first end projection 24 of the magnetism generator 2 . A second guide portion 44 that guides the second protrusion 73 of the connecting portion 7 is formed at the angular positions θ of 90 degrees and 270 degrees in the internal space 41 of the storage body 4 . The second guide portion 44 is a second groove portion 44 extending in the X direction and accommodating each second protrusion 73 of the connecting portion 7 . The second groove portion 44 has a substantially rectangular cross section when viewed in the X direction.

The magnetism detection element 3 detects the magnetic field generated by the magnetism generator 2 . The magnetic detection element 3 is mounted on the container 4 outside the internal space 41 . The magnetic detection element 3 is a Hall element, but may be a magnetoresistive element such as a TMR element. The magnetic detection element 3 includes a Hall element 31 that detects the magnetic flux density Bx in the X direction, a Hall element 32 that detects the magnetic flux density Bz in the Z direction, and a processing section 33 . The processing unit 33 calculates magnetic field angle=arctan(Bz/Bx). The relationship between the magnetic field angle and the X-direction relative position of the magnet 25 with respect to the magnetic detection element 3 is obtained in advance. The processing unit 33 converts the magnetic field angle into an output voltage corresponding to the relative position in the X direction by the conversion means, and outputs the output voltage.

The stroke sensor module 1 operates as follows. In FIG. 3A, when the rod 6 and the connecting portion 7 move in the +X direction along with the movement of the object to be detected, the base portion 71 of the connecting portion 7 resists the biasing force of the spring member 8 and the magnetism generating body 2 in the +X direction. The X-direction relative position between the magnet 25 and the magnetic detection element 3 changes, and the magnetic detection element 3 outputs an output voltage corresponding to the change. When the rod 6 and the connecting portion 7 move in the -X direction, the magnetism generator 2 moves in the -X direction due to the biasing force of the spring member 8 . Due to the biasing force of the spring member 8, the contact between the connecting portion 7 and the magnetism generator 2 is maintained.

When the magnetism generator 2 moves in the X direction in the internal space 41 of the storage body 4 , the plurality of first protrusions 23 are guided by the first guide portion 42 . Only a slight gap exists between the first protrusion 23 and the first groove 42 . Since the first protrusion 23 is substantially restrained in the Y and Z directions by the first groove 42, the relative position of the magnet 25 to the magnetic detection element 3 is substantially unchanged in the Y and Z directions. . As a result, the accuracy of the stroke sensor module 1 is improved. Since the rotation of the magnetism generator 2 around the X-axis is also substantially restrained, the normal line of the magnet 25 of the magnetism generator 2 maintains the Z direction. As a result, measurement errors due to rotation of the magnet 25 can be reduced. Furthermore, when the magnetism generator 2 moves in the X direction in the internal space 41 of the storage body 4 , the Z direction tops of the plurality of first projections 23 are in line contact with the first guide portion 42 . This is because the portion of the Z-direction top of the first projection 23 that makes line contact with the first guide portion 42 is part of the curved surface of the first projection 23 protruding away from the central axis C1. Therefore, the area of the portion where the magnetism generator 2 slides on the inner wall of the container 4 is greatly reduced compared to the case where the magnetism generator 2 is in surface contact with the inner wall of the container 4 . As a result, generation of fine powder due to sliding is suppressed. Furthermore, the first end projections 24 on both sides of the first projection 23 in the Y direction make point contact with the first guide portion 42 . As a result, generation of fine powder due to sliding is further suppressed. Since generation of fine powder due to sliding is suppressed, deterioration of smooth movement of the magnetism generator 2 over time is suppressed.

Similarly, when the connecting portion 7 of the moving body 5 moves in the X direction in the internal space 41 of the storage body 4 , the plurality of second protrusions 73 are guided by the second guide portion 44 . The second projection 73 is constrained in the Y and Z directions by the second groove 44, and the rotation of the moving body 5, particularly the rod 6, around the X axis is also constrained. Furthermore, when the connecting portion 7 of the moving body 5 moves in the X direction in the internal space 41 of the storage body 4 , the Z direction top of the second projection 73 makes line contact with the second guide portion 44 . Also, the second end projection 74 of the second projection 73 makes point contact with the second guide portion 44 . Therefore, for the same reason as the first protrusion 23, the generation of fine powder due to sliding is suppressed, and the smooth movement of the magnetism generator 2 is suppressed from being impaired over time. Since there is a slight gap between the second protrusion 73 and the second groove 44, it is impossible to completely prevent the rotation of the rod 6 around the X axis. However, since the moving body 5 is separate from the magnetism generator 2 and only contacts the magnetism generator 2 in the X direction, the rotational moment caused by the rotation of the rod 6 about the X axis is almost the same as the magnetism generator 2. not transmitted to As a result, measurement errors due to rotation of the magnet 25 can be further reduced.

Although the first projection 23 and the second projection 73 are provided in this embodiment, the generation of fine powder can be suppressed by providing only one of the projections 23 and 73 . The magnetism generator 2 can also have only one magnet 25, as shown in FIG. 6(a). Since the magnetic flux is symmetrically formed on both sides of the magnet 25, the relative position of the magnetism generator 2 can be detected by detecting Bx. In this case, the magnet 25 is preferably arranged in the center of the magnetism generator 2 in the X direction. Alternatively, as shown in FIG. 6(b), the magnetism generator 2 may have three or more magnets 25 provided on the main body 21 at regular intervals in the X direction. It is preferable that the magnets 25 on both ends in the X direction face the corresponding first projections 23 . For example, the magnet 25 and the first projection 23 are positioned on the same straight line extending parallel to the Z direction. The number of magnets 25 is not limited, and can be appropriately determined in consideration of the purpose of use of the stroke sensor module 1, required measurement accuracy, and the like. A part of the first protrusions 23 may have a shape different from that of the other first protrusions 23 . For example, by making the height of the first projections 23 on the upper side lower than the height of the first projections 23 on the lower side, the total height (dimension in the Z direction) of the magnetism generator 2 can be suppressed. As a result, the height of the stroke sensor module 1 can be reduced.

In this embodiment, the magnet 25 and the moving body 5 are incorporated in the stroke sensor module 1 and integrated with the stroke sensor module 1 . That is, since the moving body 5 is integrated with the storage body 4 and the magnetism generating body 2, highly accurate calibration is possible. The first reason is that before the stroke sensor module 1 is built into an actual machine, calibration can be performed using multi-point measurement results. For example, the measurement object may be connected to a member, such as a plunger, that is configured to stop only at the ends of its range of motion. When calibrating the stroke sensor module 1 after incorporating the stroke sensor into the actual machine, only two measurement results can be used for the calibration. Since calibration can be performed in advance in this embodiment, the measurement accuracy of calibration is improved. Since the stroke sensor module 1 is an integral type, there is no need to consider errors during installation. Errors in installation lead to extra margins, but even such margins can be minimized. Even if each member is displaced due to thermal expansion, calibration considering thermal expansion is possible. The second reason is that calibration can be performed efficiently. For example, when the magnetism generator 2 and the magnetism detection element 3 are separately attached to the actual machine, it is necessary to perform calibration in an environment where many parts exist around them. In the present embodiment, dedicated equipment can be used in the manufacturing facility of the stroke sensor module 1 to efficiently perform calibration.

(Second embodiment)
7(a) is a side sectional view of the stroke sensor module 101 of the second embodiment, FIG. 7(b) is a perspective view of the magnetism generator 102, and FIGS. 7(c) and 7(d). respectively show cross-sectional views taken along lines AA and BB in FIG. 7(a). This embodiment differs from the first embodiment in the configuration of the base 122 and the first protrusion 123 . The structures of the moving body 5 and the spring member 8 are the same as those of the first embodiment. The container 104 is the same as that of the first embodiment, except that the shape of the first groove 142 is different in accordance with the first protrusion 123 . The magnetism generator 102 has only one magnet 125 . The base portion 122 is arranged in the X-direction central portion of the magnetism generator 102 and extends in the X-direction. The first protrusion 123 is a protrusion formed at the tip of the base 122 and extending in the X direction. As a result, the first protrusion 123 is arranged in the center of the magnetism generator 102 in the X direction, and one magnet 125 faces the plurality of first protrusions 123 . Base 122 functions as a base for first protrusion 123 . By providing the base portion 122 , the strength of the first protrusion 123 is improved compared to the case of providing a protrusion projecting long from the main body portion 21 . The X-direction length of the first protrusion 123 is longer than the Y-direction length of the first protrusion 23 of the first embodiment, and preferably longer than at least the X-direction length of the magnet 125 . As a result, the magnetism generator 102 is effectively restrained in the Y and Z directions, and the accuracy of the stroke sensor module 101 is improved. Although the first protrusions 123 are provided at the angular positions θ of 0 degree and 180 degrees, various numbers of the first protrusions 123 can be arranged at various positions as in the first embodiment. Since the first projection 123 has a substantially cylindrical shape, it is in line contact with three surfaces of the first groove portion 142 . This can suppress the generation of fine powder. Since only one magnet 125 is provided in this embodiment, the size of the stroke sensor module 101 can be reduced. Although illustration is omitted, as in the first embodiment, the magnetism generator 102 may have two magnets near both ends of the main body 21, or they may be spaced apart at equal intervals in the first direction X. There may be more than two magnets provided at the same time. The first protrusion 123 may extend to a position facing the magnets at both ends in the Z direction, or may be provided between the magnets at both ends so as not to overlap the magnets at both ends in the Z direction.

(Third embodiment)
FIG. 8 is a view similar to FIG. 2 of the stroke sensor module 201 of the third embodiment. In this embodiment, the housing 204 has a first guide portion 242 with a plurality of first projections 245 , and the magnetism generator 202 is guided by the first guide portions 242 on a plurality of surfaces 227 . Prepare. Similarly, the container 204 has a second guide portion 244 with a plurality of second projections 243 , and the connecting portion 207 of the movable body 205 is guided by the second guide portions 244 . 275. That is, in this embodiment, the relationship between the projection and the guide portion is reversed from that in the first embodiment. This embodiment has the same effect as the first embodiment. Although not shown, the magnetism generator 202 may have a plurality of first projections 23 and the storage body 204 may have a plurality of second projections 243 . Similarly, the container 204 may have a plurality of first protrusions 245 and the connecting portion 207 may have a plurality of second protrusions 73 .

(Fourth embodiment)
FIG. 9 shows an example in which the stroke sensor modules 1 according to the first to third embodiments are applied to a hybrid vehicle. The hybrid vehicle has an engine 301 , a motor 302 , a control section 303 that controls the engine 301 and the motor 302 , and a battery 304 connected to the motor 302 . A brake pedal 305, which is a movable part, is connected to the rod 6 of the first stroke sensor module 1A having the same configuration as the stroke sensor module 1 according to the first to third embodiments, and an accelerator pedal 306, which is also a movable part, is connected to , and the rod 6 of a second stroke sensor module 1B having the same configuration as the stroke sensor module 1 according to the first to third embodiments. The first stroke sensor module 1A measures the depression amount of the brake pedal 305 and transmits it to the control section 303 . The second stroke sensor module 1B measures the depression amount of the accelerator pedal 306 and transmits it to the control section 303 . The control unit 303 calculates the required torque according to the depression amount of the accelerator pedal 306, the separately measured vehicle speed, etc., and controls the engine 301 and the motor 302 based on this required torque. The control unit 303 calculates the energy regenerated by the motor 302 according to the depression amount of the brake pedal 305, the separately measured vehicle speed, and the like. Note that the movable part is not limited to the brake pedal 305 and the accelerator pedal 306, and may be anything that is connected to the rod 6 of the stroke sensor module 1 and moves the rod 6 linearly.

(Fifth embodiment)
10A and 10B are schematic diagrams of the stroke sensor module 301 of the fifth embodiment. FIG. 10A is a perspective view of the stroke sensor module 301 attached to the support portion 11, and FIG. Fig. 3 shows a cross-sectional view; FIG. 11(a) shows a perspective view of the stroke sensor module 301 as viewed obliquely from below, and FIG. 11(b) shows a perspective view of the supporting portion 11 near where the stroke sensor module 301 is attached. This embodiment is characterized by the mounting structure of the stroke sensor module 301, and the internal structure of the stroke sensor module 301 may be any of the first to third embodiments.

A sensor module 301 is attached to the support 11 . The support portion 11 has a surface (hereinafter referred to as main surface 12) extending substantially parallel to the long axis of the stroke sensor module 301 (an axis parallel to the X direction). The main surface 12 is a mounting surface 18 to which the mounting portion 49 of the sensor module 301 is mounted. The main surface 12 further has a positioning portion 13, which will be described later. Therefore, in this embodiment, the mounting surface 18 of the stroke sensor module 301 matches the surface on which the positioning portion 13 is provided. The support portion 11 has a wall portion 14 that rises from the main surface 12 , and a through hole 15 is provided in the wall portion 14 . The wall portion 14 is orthogonal to the major surface 12, but may intersect the major surface 12 at an angle other than a right angle. A step 16 is provided between the main surface 12 and the through hole 15 , and the through hole 15 is separated from the main surface 12 . That is, the wall portion 14 is provided with a region having a predetermined width along the entire circumference of the opening of the through hole 15 .

The storage body 4 of the stroke sensor module 301 is inserted through the through hole 15 . A portion of the container 4 inserted through the through-hole 15 (hereinafter referred to as a through-hole 45 ) is fitted with the through-hole 15 . The through hole 15 and the insertion portion 45 are preferably circular, and the inner diameter of the through hole 15 is slightly larger than the outer diameter of the insertion portion 45 . Since the through hole 15 and the insertion portion 45 are circular, the insertion portion 45 can be rotated at any angle with respect to the through hole 15 . Therefore, it is possible to easily attach a stroke sensor module 301, which will be described later. An O-ring 46 is attached to the mounting groove 47 on the outer peripheral surface of the insertion portion 45 . O-rings 46 are provided for the purpose of sealing the space on one side of wall 14 from the space on the other side. For example, if the wall 14 is a partition wall between the engine compartment and the passenger compartment of an automobile, the O-ring 46 prevents oil from leaking from the engine compartment to the passenger compartment. If there is no such need, the O-ring 46 can be omitted. The container 4 has a large diameter portion 48 having an outer diameter larger than that of the insertion portion 45 and concentric with the insertion portion 45 . The large-diameter portion 48 has a mounting portion 49 , and a boundary portion between the insertion portion 45 and the large-diameter portion 48 is adjacent to the step 16 or the wall portion 14 . The mounting portion 49 of the container 4 has an arm portion 141 protruding from the cylindrical main body of the container 4, and the arm portion 141 has a bolt hole 142 through which the bolt B is inserted. The main surface 12 has a threaded hole 17 with which a bolt B is engaged, and the mounting portion 49 of the container 4 is fixed to the main surface 12 of the support portion 11 by the bolt B. As shown in FIG. As will be described later, the large-diameter portion 48 functions as a stopper that contacts the wall portion 14 when the stroke sensor module 301 is attached. This facilitates attachment of the stroke sensor module 301 .

The large diameter portion 48 of the container 4 has a fitting portion 143 . The fitting portion 143 is a protruding portion extending in the circumferential direction of the main body of the storage body 4 . The positioning portion 13 provided on the main surface 12 of the support portion 11 is a groove extending along the fitting portion 143 (projection portion). The housing 4 is positioned in the first direction X by fitting the fitting portion 143 to the positioning portion 13 . The storage body 4 is made of resin or metal, and the support portion 11 is also made of resin or metal. Therefore, the dimensional accuracy of these parts is high, and the width of the groove is such that a slight gap is generated between the groove and the ridge. FIGS. 12A and 12B are diagrams showing problems when the positioning portion 13 and the fitting portion 143 are not present. FIG. 12A is a top view of the stroke sensor module, and FIG. 12B is a side sectional view of the stroke sensor module. showing. The upper and lower views of FIG. 12( a ) show the state where the bolt B is most leftwardly and rightwardly with respect to the bolt hole 142 of the mounting portion 49 , respectively. The upper and lower diagrams of FIG. 12(b) correspond to the upper and lower diagrams of FIG. 12(a). The bolt hole 142 has an inner diameter larger than the bolt diameter in consideration of workability when the bolt B is passed through. Therefore, the storage body 4 is attached to the support portion 11 with an attachment error R equal to the difference between the inner diameter of the bolt hole 142 and the bolt diameter. On the other hand, since the magnetism generator 2 is attached to the supporting portion 11 in an accurate positional relationship, the relative positions of the magnetism detection element 3 and the magnetism generator 2 vary within a width equivalent to the mounting error R. However, since the magnetism detecting element 3 is calibrated in a specific relative positional relationship with the magnetism generator 2, if the relative position deviates, an error occurs in the calibrated value, resulting in a measurement error. Further, even if the magnetism generator 2 is attached to the support portion 11 at the correct position, there is a possibility that a measurement error will occur due to positional deviation between the attachment portion 49 and the bolt B due to vibration or impact during use. In this embodiment, the gap between the positioning portion 13 and the fitting portion 143 is much smaller than the mounting error R. Therefore, the positioning portion 13 and the fitting portion 143 suppress mounting error in the first direction X and positional deviation in the first direction X after mounting, thereby alleviating such problems.

Next, a method of attaching the stroke sensor module 301 to the support portion 11 will be described with reference to FIG. First, as shown in FIG. 13A, the insertion portion 45 of the container 4 is inserted into the through hole 15 . That is, the storage body 4 is moved in the first direction X with the rod 6 forward, and the insertion portion 45 is arranged in the through hole 15 . By abutting the boundary between the insertion portion 45 and the large-diameter portion 48 against the wall portion 14 , rough positioning becomes possible, saving the trouble of visually confirming the positional relationship between the positioning portion 13 and the fitting portion 143 . Next, as shown in FIG. 13(b) and FIG. 13(c) which is a cross-sectional view along line AA, the container 4 is rotated around the central axis C3 of the through hole 15 in the first rotation direction. Rotate to R1. As shown in FIG. 11(b), the groove is wider on the front side with respect to the first rotation direction R1 of the container 4. As shown in FIG. In other words, with respect to the second rotation direction R2 (opposite to the first rotation direction R1) for rotating the attachment portion 49 attached to the support portion 11 away from the support portion 11, the front portion 19F of the groove is It is wider than the rear portion 19R. The rear portion 19R is a portion where the fitting portion 143 is finally fitted, and the front portion 19F is a portion facing the fitting portion 143 while the storage body 4 is rotating. The width t1 of the front portion 19F of the groove is greater than the width t2 of the rear portion 19R. A transition portion 19M between the front portion 19F and the rear portion 19R gradually changes in width. With such a groove configuration, even if the fitting portion 143 is deviated in the first direction X from the center line of the rear portion 19R of the groove in the initial position, it can be moved in the first direction X while rotating the housing 4. is automatically positioned. By the above operation, the fitting portion 143 fits into the groove of the positioning portion 13, and the storage body 4 is positioned in the first direction X. As shown in FIG. Next, as shown in FIG. 13(d) and FIG. 13(e), which is a cross-sectional view along line BB, the mounting portion 49 of the container 4 positioned in the first direction X is supported. It is attached to the attachment surface 18 (main surface 12) of the portion 11. FIG. That is, the bolt B is inserted into the bolt hole 142 of the mounting portion 49 and is engaged with the screw hole 17 of the support portion 11 .

As described above, since the container 4 is inserted into the through hole 15 and rotated in a stable state, the mounting operation of the container 4 can be easily performed. Since the container 4 is supported by the bolts B and the through holes 15 both during and after the mounting, there is no need to provide a plurality of mounting portions 49. - 特許庁In other words, only one relatively large arm portion 141 is required, and only one bolt B is required. This makes it possible to reduce costs and streamline the mounting process. Also, when viewed from the first direction X, the mounting portion 49 and the fitting portion 143 are at different angular positions. For example, referring to FIG. 13(c), the fitting portion 143 is at the 3 o'clock position and the mounting portion 49 is at the 1:30 position. As a result, it becomes possible to perform the fixing work with the bolt B at a position away from the place where the fitting portion 143 and the positioning portion 13 are fitted.

Further, in front of the fitting portion 143 with respect to the first rotation direction R1 or behind the fitting portion 143 with respect to the second rotation direction R2, the outer peripheral surface of the storage body 4 is circular arc-shaped 144 over a predetermined angle range θ1. It is said that Therefore, the storage body 4 can be rotated while the outer peripheral surface of the support portion 11 is slid on the main surface 12 . It should be noted that the predetermined angular range θ1 is the angular range in which the container 4 faces the main surface 12 during rotation. It is the angular range between the final angular position when the positioning portion 13 is fitted. In another modification, the portion facing the main surface 12 during rotation may be recessed from the main surface 12 so that the rotation of the container 4 is not hindered by the support portion 11 .

The positions of the fitting portion 143 and the mounting portion 49 in the first direction X are not limited. In this embodiment, as shown in FIG. 10B, the fitting portion 143 is between the mounting portion 49 and the wall portion 14, but the mounting portion 49 may be between the fitting portion 143 and the wall portion 14. . It is also preferable that the fitting portion 143 and the mounting portion 49 are at the same position in the first direction X. As shown in FIG. When the mounting portion 49 is rotated, the mounting portion 49 is pressed against the main surface 12, so that a torsional moment is generated. When the distance between the fitting portion 143 and the mounting portion 49 in the X direction is small, the point of force and the point of action become closer, and the torsional moment decreases, so the stress on the storage body 4 and the fitting portion 143 can be reduced.

Next, several modifications of this embodiment will be described. FIG. 14 shows the housing 4 of the stroke sensor module 301 according to the first modification. 14A and 14B are cross-sectional views before and after the stroke sensor module 301 is attached, respectively. The mounting surface 18 is parallel to the main surface 12 on which the positioning portion 13 is provided. That is, the mounting surface 18 is located at a different height than the principal surface 12 . In this modified example, the mounting surface 18 is between the center C<b>4 in the first direction X of the container 4 and the main surface 12 . 15A and 15B are cross-sectional views before and after the stroke sensor module 301 is attached, respectively. The mounting surface 18 is on the opposite side of the main surface 12 across the center C4 of the container 4 in the first direction X. As shown in FIG. Thus, the height of mounting surface 18 is not limited. 16A and 16B are cross-sectional views before and after the stroke sensor module 301 is attached, respectively. As shown in the figure, the mounting surface 18 is perpendicular to the main surface 12 on which the positioning portion 13 is provided. The angle between the mounting surface 18 and the main surface 12 is not limited, and the mounting surface 18 can form an arbitrary angle (an angle exceeding 0 degrees and less than 180 degrees) with respect to the main surface 12 . Modifications shown in FIGS. 14 to 16 can be appropriately selected depending on the shape of the support portion 11, and any modification has the same effect as the present embodiment.

FIG. 17 shows a housing 4 for a stroke sensor module 301 according to a second modification. 17(a) is a cross-sectional view of the stroke sensor module 301 viewed from the first direction X, and FIG. 17(b) is a cross-sectional view of the stroke sensor module 301 viewed from a direction orthogonal thereto. The fitting portion 143 is a protruding portion having a groove 145 extending in the circumferential direction of the container 4 , and the positioning portion 13 is another protruding portion extending along the groove 145 . That is, in this modified example, a groove 145 is formed in the container 4 . Since the distance between the main surface 12 and the container 4 is greater than the height of the positioning portion 13 , interference with the positioning portion 13 when inserting the container 4 into the through hole 15 is prevented. Although detailed description is omitted, the groove 145 can have a shape similar to the grooves in the above-described embodiments.

FIG. 18 shows a housing 4 for a stroke sensor module 301 according to a third modification. FIG. 18(a) is a cross-sectional view of the stroke sensor module 301 viewed from a direction perpendicular to the first direction X, and FIG. 18(b) is a cross-sectional view of the stroke sensor module 301 before being mounted, viewed from the first direction X. is. Although the through hole 15 is provided in the wall portion 14, the main surface 12 provided with the positioning portion 13 and the inner surface of the through hole 15 are continuous, and there is no step 16 as in the above-described embodiment. Therefore, in this modified example, the fitting portion 143 is provided at a position adjacent to the peripheral edge portion of the opening of the through hole 15 or the wall portion 14 with respect to the first direction X. As shown in FIG. As a result, when the storage body 4 is inserted into the through hole 15 , the side surface of the fitting portion 143 abuts against the peripheral edge portion or wall portion 14 of the opening of the through hole 15 . Since the fitting portion 143 functions as a stopper in this modified example, the stroke sensor module 301 can be attached to the support portion 11 in the same process as in the above-described embodiment.

FIG. 19 shows a housing 4 for a stroke sensor module 301 according to a fourth modification. 19(a) is a cross-sectional view of the stroke sensor module 301 viewed from a direction perpendicular to the first direction X, and FIG. 19(b) is a cross-sectional view taken along line AA of FIG. 19(a). showing. FIG. 19(c) is a bottom view of the storage body 4 as seen from the direction B in FIG. The fitting portion 143 is a circumferential groove 146 extending in the circumferential direction of the container 4 , and the positioning portion 13 is a ridge extending along the circumferential groove 146 . In this modified example, grooves are formed in the container 4 as in the second modified example, but the circumferential grooves 146 are formed in the side surfaces of the container 4 . The container 4 has an axial groove 147 connected with the circumferential groove 146 . The axial groove 147 extends in the first direction X from the side surface 148 of the large diameter portion 48 of the container 4 .

The stroke sensor module 301 can be attached in the same manner as the procedure shown in FIG. That is, first, as shown in FIG. 13( a ), the container 4 is moved in the first direction X, and the insertion portion 45 is inserted into the through hole 15 . FIG. 19(c) shows the state at this time. When the storage body 4 is moved in the first direction X, the positioning portion 13 (projection portion) relatively moves inside the axial groove 147 . Therefore, interference between the positioning portion 13 and the storage body 4 is prevented. That is, when the storage body 4 is rotated by a predetermined angle in the direction in which the mounting portion 49 separates from the support portion 11 (second rotation direction R2), the axial groove 147 is aligned with the positioning portion 13 ( ridges) are included. Next, as shown in FIGS. 13(b) and 13(c), the container 4 is rotated around the central axis C3 of the through hole 15 in the first rotation direction R1. The procedures shown in FIGS. 13(b) and 13(c) can be performed in the same manner as in the fifth embodiment.

Compared with the second modification, this modification makes it easier to ensure the height of the positioning portion 13 and the depth of the circumferential groove 146, so that the strength of the positioning portion 13 can be easily ensured. Further, the axial groove 147 functions as a guide portion that guides the movement of the container 4 in the first direction X when the insertion portion 45 of the container 4 is inserted into the through hole 15 . Therefore, in this modified example, the mounting of the stroke sensor module 301 becomes even easier. In order to prevent interference between the circumferential groove 146 and the internal mechanism of the stroke sensor module 301, the large-diameter portion 48 may have an elliptical shape, an oval shape, or the like in which the circumferential groove 146 protrudes outward.

X first direction 1, 101, 201, 301 stroke sensor module 2, 102 magnetism generator 21 main body 22, 122 base 23, 123, 245 first protrusion 25, 125 magnet 3 magnetic detection element 4, 204 container 41 Internal space 42, 242 First guide part 43 Through hole 15
44, 244 second guide portion 45 insertion portion 48 large diameter portion 49 attachment portion 5 moving body 6 rod 7 connecting portion 71 base portion 72 arm portion 73, 243 second projection 8 spring member 11 support portion 13 positioning portion 14 wall Part 15 Through hole 141 Arm 142 Bolt hole 143 Fitting part 17 Screw hole 18 Mounting surface B Bolt

Claims (19)

A stroke sensor module attached to a support portion having a through hole and a positioning portion,
a moving body that moves in a first direction;
a magnetism generator that moves in the first direction in conjunction with the moving body;
a magnetic detection element that detects the movement of the magnetic generator;
a storage body that stores a part of the moving body and the magnetic generator,
The storage body includes an insertion portion that is inserted through the through hole and fitted with the through hole, a mounting portion that is fixed to the mounting surface of the support portion, and a positioning portion that engages with the storage body to move the storage body to the first position. a fitting portion positioned in the direction of
The stroke sensor module, wherein the mounting portion and the fitting portion are at different angular positions when viewed from the first direction. 2. The stroke sensor module according to claim 1, wherein said through hole and said insertion portion are circular. 3. The stroke sensor module according to claim 1, wherein said fitting portion is a ridge extending in the circumferential direction of said housing, and said positioning portion is a groove extending along said ridge. 3. The stroke according to claim 1 or 2, wherein the fitting portion is a ridge portion having a groove extending in the circumferential direction of the container, and the positioning portion is another ridge portion extending along the groove. sensor module. The fitting portion is a circumferential groove extending in the circumferential direction of the housing, the positioning portion is a ridge extending along the circumferential groove, and the housing is a shaft connected to the circumferential groove. A direction groove is provided, and the axial groove extends from a side surface of the container in the first direction. 3. The stroke sensor module according to claim 1, including the ridge portion when viewed from the first direction. The stroke sensor module according to any one of claims 3 to 5, wherein a front portion of the groove is wider than a rear portion with respect to a direction in which the housing is rotated in a direction in which the mounting portion moves away from the support portion. The stroke sensor module according to any one of claims 3 to 6, wherein said mounting surface coincides with a surface on which said positioning portion is provided. The stroke sensor module according to any one of claims 3 to 6, wherein said mounting surface is parallel to the surface on which said positioning portion is provided. The stroke sensor module according to any one of claims 3 to 6, wherein said mounting surface forms an angle with the surface on which said positioning portion is provided. 10. The mounting portion has an arm protruding from the housing, the arm has a bolt hole through which a bolt is inserted, and the mounting surface has a screw hole with which the bolt engages. The stroke sensor module according to any one of 1. The support portion has a wall portion that rises from the surface on which the positioning portion is provided, and the through hole is provided in the wall portion so as to be separated from the surface on which the positioning portion is provided,
The storage body has a large-diameter portion having an outer diameter larger than that of the insertion portion, the large-diameter portion includes the mounting portion and the fitting portion, and a boundary portion between the insertion portion and the large-diameter portion is the wall. 11. A stroke sensor module according to any one of claims 1 to 10, adjacent to the part. The support portion has a wall portion that rises from the surface on which the positioning portion is provided, and the through hole is provided in the wall portion so that the surface on which the positioning portion is provided and the inner surface of the through hole are continuous. ,
11. The stroke sensor module according to any one of claims 1 to 10, wherein a side surface of said fitting portion is adjacent to said wall portion. 13. The method according to any one of claims 1 to 12, wherein a rear portion of said fitting portion of said housing body has an arc shape over a predetermined angular range with respect to a direction in which said housing body is rotated in a direction in which said mounting portion separates from said support portion. A stroke sensor module according to any one of the preceding items. 14. The stroke sensor module according to any one of claims 1 to 13, wherein said mounting portion and said fitting portion are at the same position with respect to said first direction. 15. The stroke sensor module according to any one of claims 1 to 14, wherein said moving body is connected to a movable part. 16. The stroke sensor module according to claim 15, wherein said movable part is a brake pedal. 16. The stroke sensor module according to claim 15, wherein said movable part is an accelerator pedal. A mounting structure for a stroke sensor module, wherein the stroke sensor module is mounted on a support portion having a through hole and a positioning portion,
The stroke sensor module is
a moving body that moves in a first direction;
a magnetism generator that moves in the first direction in conjunction with the moving body;
a magnetic detection element that detects the movement of the magnetic generator;
a storage body that stores a part of the moving body and the magnetic generator,
The storage body includes an insertion portion that is inserted through the through hole, a mounting portion that is fixed to the mounting surface of the support portion, and a fitting that fits with the positioning portion to position the storage body in the first direction. having a junction and
A mounting structure for a stroke sensor module, wherein the mounting portion and the fitting portion are at different angular positions when viewed from the first direction. A method of attaching a stroke sensor module to a support portion having a through hole and a positioning portion, comprising:
The stroke sensor module is
a moving body that moves in a first direction;
a magnetism generator that moves in the first direction in conjunction with the moving body;
a magnetic detection element that detects the movement of the magnetic generator;
a storage body that stores a part of the moving body and the magnetic generator,
The storage body has an insertion portion that is inserted through the through hole, a mounting portion that is fixed to the mounting surface of the support portion, and a fitting portion,
when viewed from the first direction, the mounting portion and the fitting portion are at different angular positions;
By inserting the insertion portion of the storage body into the through hole and rotating the storage body around the central axis of the through hole, the fitting portion is fitted with the positioning portion, and the storage body is moved. positioning in the first direction;
and attaching the attachment portion of the container positioned in the first direction to the attachment surface of the support portion.

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