JP2014113882A - Throttle grip device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a throttle grip device capable of detecting more accurately a rotary angle of a throttle grip.SOLUTION: A throttle grip device comprises: a throttle grip; a magnet 3 that rotates together with the throttle grip; a magnetic sensor 4 that can obtain output voltage corresponding to change in magnetic field of the magnet 3; and detection means for detecting based on the output voltage of the magnetic sensor 4 a rotational angle of the throttle grip, where an engine of the vehicle is controlled based on the rotational angle detected by the detection means. The magnet 3 has an inclined surface 3a, which is helically extended across the range of the rotational operation of the throttle grip, in which separation dimension between the magnetic sensor 4 and the magnet 3 varies depending on the rotational angle of the throttle grip. The inclined surface 3a is shaped so that a relation between the output voltage of the magnetic sensor 4 and the rotational angel of the throttle grip is proportional.

Description

  The present invention relates to a throttle grip device in which a vehicle engine is controlled based on a rotation angle of the throttle grip.

  In recent motorcycles, the rotation angle of the throttle grip is detected by a throttle opening sensor such as a potentiometer, and the detected value is sent as an electrical signal to an electronic control device mounted on the motorcycle. Has become popular. The electronic control unit performs a predetermined calculation based on the detection signal, and the ignition timing of the engine or the opening / closing of the exhaust valve is controlled based on the calculation result.

  For example, Patent Document 1 discloses a throttle in which a magnet is fixed to a throttle grip, a magnetic sensor including a Hall element is disposed at a position facing the magnet, and the rotation angle of the throttle grip can be detected by the magnetic sensor. A grip device has been proposed. The magnet according to the conventional throttle grip device is formed in an arc shape along the rotation direction of the throttle grip, and a magnetic sensor is disposed opposite to the side surface thereof, and the magnetic flux generated by the rotation operation of the throttle grip. By detecting a change in density with a magnetic sensor, the rotation angle of the throttle grip can be detected electrically.

JP 2006-112880 A

  However, in the above-described conventional throttle grip device, the magnetic sensor is disposed so as to face the side surface of the magnet formed in an arc shape along the rotation direction of the throttle grip. Therefore, the separation dimension between the magnet and the magnetic sensor is substantially the same, and there is a problem that it is difficult to accurately detect the rotation angle of the throttle grip.

  That is, the conventional throttle grip device sets a boundary between the S pole and the N pole at a substantially intermediate position with respect to the extending direction of the magnet, thereby causing a magnetic field change from the magnet to the magnetic sensor in accordance with the rotation operation of the throttle grip. Therefore, it is not easy to accurately set the boundary between the S pole and the N pole, and there is a possibility that an error may occur in the detection of the rotation angle of the throttle grip.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a throttle grip device that can detect the rotation angle of the throttle grip with higher accuracy.

  According to the first aspect of the present invention, there is provided a throttle grip which is attached to the front end of a handlebar of a vehicle and is operated to rotate, a magnet which is fixed to the throttle grip and rotates together with the throttle grip, and a magnetic field change of the magnet. A magnetic sensor capable of obtaining an output voltage; and a detection means for detecting a rotation angle of the throttle grip based on the output voltage of the magnetic sensor, and based on the rotation angle of the throttle grip detected by the detection means. And the magnet has an inclined surface in which a separation distance from the magnetic sensor changes according to a rotation angle of the throttle grip, and the inclined surface is The relationship between the output voltage of the magnetic sensor and the rotation angle of the throttle grip is proportional. Characterized in that it is the that shape.

  According to a second aspect of the present invention, in the throttle grip device according to the first aspect, the magnet is extended in a helical shape over a rotational operation range of the throttle grip.

  According to a third aspect of the present invention, in the throttle grip device according to the first or second aspect, the inclined surface of the magnet has a proportional relationship between the output voltage of the magnetic sensor and the rotation angle of the throttle grip. As described above, the magnetic sensor has a shape having a predetermined curvature with respect to the arrangement direction of the magnetic sensor.

  According to a fourth aspect of the present invention, in the throttle grip device according to any one of the first to third aspects, the magnet is magnetized to the same pole over the entire area of the inclined surface. To do.

  According to a fifth aspect of the present invention, in the throttle grip device according to any one of the first to fourth aspects, the magnet and the magnetic sensor are arranged to face each other in the direction of the rotation axis of the throttle grip. To do.

  According to the first aspect of the present invention, since the magnet has an inclined surface in which the distance between the magnet and the magnetic sensor changes according to the rotation angle of the throttle grip, the rotation angle of the throttle grip can be detected more accurately. In addition, since the inclined surface has a shape in which the relationship between the output voltage of the magnetic sensor and the rotation angle of the throttle grip is proportional, the relationship between the output voltage and the rotation angle of the throttle grip is corrected to a proportional relationship. This eliminates the need for separate processing and the like, and allows the rotation angle of the throttle grip to be detected more smoothly and accurately.

  According to the invention of claim 2, since the magnet is helically extended over the rotation operation range of the throttle grip, the distance between the magnet and the magnetic sensor changes according to the rotation angle of the throttle grip. The inclined surface can be easily obtained, and the rotation angle of the throttle grip can be detected with higher accuracy.

  According to the invention of claim 3, the inclined surface of the magnet has a predetermined curvature with respect to the arrangement direction of the magnetic sensor so that the relationship between the output voltage of the magnetic sensor and the rotation angle of the throttle grip is proportional. Since it has the shape, it is possible to detect the rotation angle of the throttle grip with higher accuracy.

  According to the invention of claim 4, since the magnet is magnetized to the same pole over the entire inclined surface, the magnetic force generated from the inclined surface can be made substantially constant over the extending direction of the magnet. The magnetic field change detected by the magnetic sensor can be generated stably.

  According to the invention of claim 5, the magnet and the magnetic sensor are disposed so as to oppose each other in the direction of the rotation axis of the throttle grip, so that the magnet and the magnetic sensor are opposed to each other in a plane orthogonal to the rotation axis. Compared to the above, it is possible to easily reduce the size of the apparatus and to effectively use the inclined surface formed by the helically formed magnet.

The front view and side view which show the throttle grip apparatus which concerns on embodiment of this invention The front view and side view which show the state which removed the 1st case member in the throttle grip apparatus III-III line sectional view in FIG. IV-IV line sectional view in FIG. Sectional view taken along line VV in FIG. Sectional view taken along line VI-VI in FIG. Exploded perspective view showing the throttle grip device The perspective view which shows the positional relationship of the magnetic sensor and magnet in the throttle grip apparatus Front view and side view showing magnet in the throttle grip device The top view which shows the positional relationship of the magnetic sensor and magnet in the throttle grip apparatus Schematic diagram showing the positional relationship between the magnetic sensor and the magnet in the process of rotating the throttle grip in the throttle grip device Schematic diagram showing the positional relationship between the magnetic sensor and the magnet in the process of rotating the throttle grip in the throttle grip device Schematic diagram showing the positional relationship between the magnetic sensor and the magnet in the process of rotating the throttle grip in the throttle grip device Schematic diagram showing the positional relationship between the magnetic sensor and the magnet in the process of rotating the throttle grip in the throttle grip device The block diagram which shows the electrical connection of the magnetic sensor and detection means in the throttle grip apparatus The graph which shows the relationship between the rotation angle of the throttle grip in the same throttle grip apparatus, and the separation dimension of a magnetic sensor and a detection means Graph showing the relationship between the rotation angle of the throttle grip and the output voltage of the magnetic sensor in the throttle grip device

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The throttle grip device according to the present embodiment is for detecting the rotation angle of the throttle grip attached to the handlebar of the two-wheeled vehicle and sending the detection signal to an electronic control device such as an ECU mounted on the two-wheeled vehicle. As shown in FIG. 15, the throttle grip 2, the magnet 3, the magnetic sensor 4, the detection means 6, the case member 8, the return spring 9, and the friction leaf spring 10 are mainly configured. Yes.

  The throttle grip 2 is attached to the front end portion of the handlebar H of the two-wheeled vehicle, and is rotatable with respect to the handlebar H around the rotation axis L. The grip grip portion 2a that can be gripped by the driver, The grip pipe 2b is fixed inside and integrated with the grip grip portion 2a. The grip pipe 2b is formed, for example, by molding a hard resin material into a predetermined shape, and a guide portion 2ba having a larger diameter portion than other portions is formed at the base end portion (left end portion in FIGS. 2 and 3). Is formed.

  As shown in FIG. 4, an accommodation recess 2bb is formed on the end surface of the guide 2ba, and the magnet 3 is fitted and fixed to the accommodation recess 2bb. The magnet 3 is made of a permanent magnet formed in a predetermined shape, and is fixed to the guide portion 2ba of the throttle grip 2 and rotates together with the throttle grip 2. A magnetic sensor 4 is disposed at a position facing the magnet 3 (inside a case member 8 to be described later).

  The magnetic sensor 4 can obtain an output voltage corresponding to a magnetic field change (change in magnetic flux density) of the magnet 3. For example, a Hall element (specifically, a magnet 3) that is a magnetic sensor using the Hall effect. Linear Hall IC capable of obtaining an output voltage proportional to the magnetic field (magnetic flux density) of the magnetic field. The magnetic sensor 4 according to this embodiment is formed on a printed circuit board 5 on which a predetermined electric circuit is printed.

  The detecting means 6 detects the rotation angle of the throttle grip 2 based on the output voltage of the magnetic sensor 4, and as shown in FIG. 15, is electrically connected to the magnetic sensor 4 and is mounted on the motorcycle. (Engine control unit) 7 is also electrically connected. Thus, the vehicle engine can be controlled based on the rotation angle of the throttle grip 2 detected by the detection means 6.

  On the other hand, on the base end side of the throttle grip 2 in the handle bar H, a case member 8 composed of a first case member 8a and a second case member 8b formed in a half-split shape is fixed. The case member 8 is formed by assembling the first case member 8a and the second case member 8b with the mounting screw B in a state where the handle bar H is sandwiched, and the inside thereof is shown in FIG. As shown, a first housing portion 8ba, a second housing portion 8bb, and a third housing portion 8bc are formed. Note that the first case member 8a is also formed with housing portions corresponding to the first housing portion 8ba and the third housing portion 8bc.

  A guide portion 2ba of a grip pipe 2b constituting the throttle grip 2 is rotatably inserted and assembled in the first accommodating portion 8ba, and the rotation operation is guided by the guide portion 2ba when the throttle grip 2 is rotated. To get. Further, as shown in FIG. 6, in the state where the printed board 5 is accommodated in the second accommodating portion 8bb and the printed board 5 is accommodated in the second accommodating portion 8bb, as shown in FIG. The magnetic sensor 4 and the magnet 3 are opposed to each other in the direction of the rotation axis L of the throttle grip 2.

  However, two magnetic sensors 4 are formed on the printed circuit board 5 according to the present embodiment, and output voltages are transmitted from the magnetic sensors 4 to the detection means 6 respectively. As a result, even if a failure such as a failure occurs in one of the magnetic sensors 4, the vehicle engine can be normally controlled based on the output voltage from the other magnetic sensor 4. Alternatively, only one magnetic sensor 4 may be formed on the printed circuit board 5 and the vehicle engine may be controlled exclusively based on the output voltage from the magnetic sensor 4.

  A return spring 9 made of a torsion coil spring is housed in the third housing portion 8bc. The return spring 9 has one end connected to the guide portion 2ba of the grip pipe 2b and the other end connected to a predetermined portion of the case member 8, and always urges the throttle group 2 toward the initial position. It is. That is, when the throttle grip 2 in the initial position is rotated against the biasing force of the return spring 9, the throttle opening of the vehicle is controlled to gradually increase, and the hand gripping the grip grip portion 2a is loosened. The throttle grip 2 naturally returns toward the initial position by the urging force of the return spring 9, and the throttle opening is gradually reduced.

  Furthermore, a friction plate spring 10 is disposed in the case member 8 according to the present embodiment, as shown in FIG. The friction leaf spring 10 is made of, for example, a plate-shaped metal member, one end of which is fixed with a screw b, and the other end has a spring force (biasing force) against the guide portion 2ba of the grip pipe 2b. It is assembled in a state of contact while. As a result, when the throttle grip 2 is rotated, the urging force by the friction leaf spring 10 is applied in the direction opposite to the direction of the rotation operation, which is substantially the same as that of the conventional throttle operation via the wire. The operational feeling can be obtained.

  Here, as shown in FIG. 9, the magnet 3 according to the present embodiment is helical (displaced in a direction perpendicular to the rotation surface while rotating in an arc shape) over the rotational operation range of the throttle grip 2. An inclined surface 3a extending in a (three-dimensional curved shape) (spiral) and having a separation distance from the magnetic sensor 4 that varies depending on the rotation angle of the throttle grip 2, as shown in FIG. It has the inclined surface 3a and the end surface 3b formed in the both ends of the magnet 3 continuously. Among these, the end surface 3b is formed of a surface substantially orthogonal to the rotation axis L of the throttle grip 2 in a state where the magnet 3 is mounted in the housing recess 2bb.

  In particular, the inclined surface 3a of the magnet 3 according to the present embodiment is such that the distance between the magnetic sensor 4 and the magnetic sensor 4 varies according to the rotation angle of the throttle grip 2, as shown in FIG. As shown in FIG. 17, the relationship between the output voltage of the magnetic sensor 4 and the rotation angle of the throttle grip 2 is set to have a proportional shape. More specifically, the inclined surface 3a of the magnet 3 is arranged on the magnetic sensor 4 so that the relationship between the output voltage of the magnetic sensor 4 and the rotation angle of the throttle grip 2 is proportional (the relationship shown in FIG. 17). The shape has a predetermined curvature (curvature) with respect to the installation direction (perpendicular to the paper surface in FIG. 10).

  Further, as shown in FIG. 9, the magnet 3 has a thickness dimension s that is substantially the same in the extending direction (helical direction), and the same pole (S pole or N pole) over the entire area of the inclined surface 3a. Poled). That is, the inclined surface 3a facing the magnetic sensor 4 is magnetized to the S pole and the back surface thereof is magnetized to the N pole, or the inclined surface 3a facing the magnetic sensor 4 is magnetized to the N pole and the back surface is magnetized to the S pole. It is magnetized. The magnet 3 is formed in an arc shape as shown in FIG. 10 when viewed from the direction of the rotation axis L of the throttle grip 2, and in the process in which the magnet 3 rotates in the direction of the arrow in FIG. The magnetic sensor 4 is always opposed to the inclined surface 3a or the end surface 3b of the magnet 3.

Next, the operation of the throttle grip device 1 according to this embodiment will be described.
After the engine of the motorcycle is started, when the driver rotates the throttle grip 2 while gripping the grip grip portion 2a, the magnet 3 rotates in the same direction, and as shown in FIGS. The distance between the magnetic sensor 4 and the magnetic sensor 4 changes in the order of t1, t2, t3, and t4. The relationship between the separation dimensions t1 to t4 and the rotation angle of the throttle grip 2 is as shown in FIG. 11, the rotation angle of the throttle grip 2 is 0 degree (initial position), the rotation angle is 20 degrees in FIG. 12, the rotation angle is 40 degrees in FIG. 13, and the rotation angle is FIG. A state of 60 degrees is shown.

  Here, as described above, the inclined surface 3a of the magnet 3 according to the present embodiment has a shape in which the relationship between the output voltage of the magnetic sensor 4 and the rotation angle of the throttle grip 2 has a proportional relationship (see FIG. 17). Therefore, the rotation angle of the throttle grip 2 can be accurately detected by the detection unit 6 without correcting the data by a separate correction unit or the like. Accordingly, the detected value of the rotation angle of the throttle grip 2 is transmitted as an electric signal to the ECU 7 of the vehicle, and engine control (specifically, throttle control) is performed in accordance with the rotation angle of the throttle grip 2. Become.

  According to the embodiment described above, the magnet 3 has the inclined surface 3a in which the separation distance from the magnetic sensor 4 changes according to the rotation angle of the throttle grip 2, so that the rotation angle of the throttle grip 2 can be detected with higher accuracy. In addition, since the inclined surface 3a has a shape in which the relationship between the output voltage of the magnetic sensor 4 and the rotation angle of the throttle grip 2 is proportional, the output voltage and the rotation angle of the throttle grip 2 are Thus, a separate process or the like for correcting the above relationship to a proportional relationship is unnecessary, and the rotation angle of the throttle grip 2 can be detected more smoothly and accurately.

  In particular, the magnet 3 according to the present embodiment extends in a helical shape (spiral shape) over the rotational operation range of the throttle grip 2, so that the magnet 3 is connected to the magnetic sensor 4 according to the rotational angle of the throttle grip 2. It is possible to easily obtain an inclined surface in which the separation dimension of the throttle grip 2 changes, and to detect the rotation angle of the throttle grip 2 with higher accuracy. In addition, the inclined surface 3a of the magnet 3 according to the present embodiment is predetermined with respect to the arrangement direction of the magnetic sensor 4 so that the relationship between the output voltage of the magnetic sensor 4 and the rotation angle of the throttle grip 2 is proportional. Therefore, the rotation angle of the throttle grip can be detected with higher accuracy.

  Furthermore, since the magnet 3 according to the present embodiment is magnetized to the same pole (either the S pole or the N pole) over the entire area of the inclined surface 3a, the magnet 3 generates the magnetic force generated from the inclined surface 3a. Therefore, the change in the magnetic field detected by the magnetic sensor can be generated stably. Furthermore, since the magnet 3 and the magnetic sensor 4 are disposed so as to oppose each other in the direction of the rotation axis L of the throttle grip 2, the magnet and the magnetic sensor are opposed to each other in a plane orthogonal to the rotation axis L. In comparison, the apparatus can be easily downsized, and the inclined surface 3a formed by the helical magnet 3 can be used effectively.

  Although the throttle grip device 1 according to the present embodiment has been described above, the present invention is not limited to this. For example, a magnet that rotates together with the throttle grip 2 (in this case, has a shape different from a helical shape). It is assumed that the magnetic sensor 4 faces the side surface (that is, the magnet 3 and the magnetic sensor 4 face each other in a plane perpendicular to the rotation axis L of the throttle grip 2), and the side surface corresponds to the rotation angle of the throttle grip 2. 17 constitutes an inclined surface in which the distance between the magnetic sensor 4 and the magnetic sensor 4 changes. The inclined surface has a proportional relationship between the output voltage of the magnetic sensor 4 and the rotation angle of the throttle grip 2 as shown in FIG. It may be a shape that becomes.

  The applied vehicle is not limited to a two-wheeled vehicle as in this embodiment, and may be applied to other vehicles having a handlebar H (for example, ATV, snowmobile, etc.).

  The inclined surface has a slope that changes in distance from the magnetic sensor in accordance with the rotation angle of the throttle grip, and the inclined surface has a proportional relationship between the output voltage of the magnetic sensor and the rotation angle of the throttle grip. As long as the throttle grip device is provided with a magnet, it can be applied to a device having a different external shape or a device to which another function is added.

DESCRIPTION OF SYMBOLS 1 Throttle grip apparatus 2 Throttle grip 3 Magnet 3a Inclined surface 4 Magnetic sensor 5 Printed circuit board 6 Detection means 7 ECU
8 Case member 9 Return spring 10 Friction leaf spring H Handlebar

Claims (5)

A throttle grip that is attached to the front end of the handlebar of the vehicle and can be rotated.
A magnet fixed to the throttle grip and rotating with the throttle grip;
A magnetic sensor capable of obtaining an output voltage corresponding to a change in the magnetic field of the magnet;
Detecting means for detecting a rotation angle of the throttle grip based on an output voltage of the magnetic sensor;
A throttle grip device in which an engine of a vehicle is controlled based on a rotation angle of the throttle grip detected by the detection means,
The magnet has an inclined surface in which a separation distance from the magnetic sensor changes according to a rotation angle of the throttle grip, and the inclined surface includes an output voltage of the magnetic sensor and a rotation angle of the throttle grip. The throttle grip device is characterized in that the relationship is a proportional relationship.   2. The throttle grip device according to claim 1, wherein the magnet extends in a helical shape over a rotation operation range of the throttle grip.   The inclined surface of the magnet has a shape having a predetermined curvature with respect to the arrangement direction of the magnetic sensor so that the relationship between the output voltage of the magnetic sensor and the rotation angle of the throttle grip is proportional. The throttle grip device according to claim 1 or 2, characterized by the above.   The throttle grip device according to any one of claims 1 to 3, wherein the magnet is magnetized to the same pole over the entire inclined surface.   The throttle grip device according to any one of claims 1 to 4, wherein the magnet and the magnetic sensor are arranged to face each other in a rotation axis direction of the throttle grip.

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