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EP-4005912-B1 - OPERATION AMOUNT DETECTION DEVICE FOR BAR HANDLE VEHICLE

EP4005912B1EP 4005912 B1EP4005912 B1EP 4005912B1EP-4005912-B1

Inventors

  • ATSUTA DAIKI

Dates

Publication Date
20260506
Application Date
20200625

Claims (6)

  1. An operation amount detection device for a vehicle with handlebar in which a pivot (40) fixed to a holder (10) attached to a vehicle body is inserted into one end of a pivot insertion hole (25) of an operator (20A; 20B), wherein the operator (20A; 20B) is a brake lever, a brake pedal or a clutch lever, and the operator is freely rotatable about an axis of the pivot, the operation amount detection device comprising: a rotation angle sensor (51) fixed to the holder (10); and a detection shaft (55) fitted into another end of the pivot insertion hole (25), wherein the operator (20A; 20B) and the detection shaft (55) co-rotate, a magnet (58) is provided at an end portion of the detection shaft (55), a magnetic detection unit (53) of the rotation angle sensor (51) faces the magnet (58) in a non-contact state in an axial direction of the detection shaft (55), and the magnetic detection unit (53) detects a rotation amount of the magnet (58).
  2. The operation amount detection device for the vehicle with handlebar according to claim 1, wherein the holder (10) or the rotation angle sensor (51) is formed with a communication path (54A; 54B) that communicates a space formed between the holder and the rotation angle sensor with an external space.
  3. The operation amount detection device for the vehicle with handlebar according to claim 1, wherein the detection shaft (55) includes: a shaft body (56); and the magnet (58) attached to an end portion of the shaft body, the magnet is inserted into a magnet reception hole (52c) formed on an outer surface of the rotation angle sensor (51), and the rotation angle sensor is formed with a communication path (54A; 54B) that communicates the magnet reception hole (52c) with the external space.
  4. The operation amount detection device for the vehicle with handlebar according to any one of claims 1 to 3, wherein an annular member (30; 35) is press-fitted into the pivot insertion hole (25), the detection shaft (55) is fitted into the annular member (30; 35), and the operator (20A; 20B), the annular member (30; 35), and the detection shaft (55) co-rotate.
  5. The operation amount detection device for the vehicle with handlebar according to any one of claims 1 to 3, wherein the operator includes: a lever body (21); a knocker (22) connected to a master cylinder (60) or a connection member; and a grip margin adjustment mechanism (23) configured to adjust a position of the lever body with respect to the knocker about the axis of the pivot (40), the pivot insertion hole (25) is formed in the lever body (21) and the knocker (22), and the lever body and the knocker are freely rotatable about the axis of the pivot (40).
  6. The operation amount detection device for the vehicle with handlebar according to claim 5, wherein an annular member (30; 35) is press-fitted into the lever body (21) and the pivot insertion hole (25) of the knocker (22); the detection shaft (55) is fitted into the annular member (30; 35); and the lever body (21), the knocker (22), the annular member (30; 35), and the detection shaft (55) co-rotate.

Description

Technical Field The present disclosure relates to an operation amount detection device for a vehicle with handlebar. Background Art A vehicle with handlebar is provided with an operation amount detection device for detecting an operation amount of a brake lever. An operation amount detection device in the related art includes a rotation angle sensor attached to a handlebar and a connection arm having one end connected to a brake lever and another end connected to the rotation angle sensor (for example, see Japanese Patent No. 6148273). In the operation amount detection device, the other end of the connection arm rotates in conjunction with the brake lever, and the rotation angle sensor detects a rotation angle of the other end of the connection arm, thereby detecting the operation amount of the brake lever. US 8281682 B2 discloses, also known from the prio art, an operation amount detection device for a vehicle with handlebar in which a pivot fixed to a holder attached to a vehicle body is inserted into one end of a pivot insertion hole of an operator, and the operator is freely rotatable about an axis of the pivot, the operation amount detection device comprising: a rotation angle sensor fixed to the holder; and a detection shaft fitted into another end of the pivot insertion hole, wherein the operator and the detection shaft co-rotate, a magnet is provided at an end portion of the detection shaft,a magnetic detection unit of the rotation angle sensor faces the magnet in a non-contact state, and the magnetic detection unit detects a rotation amount of the magnet. Summary of Invention Technical Problem In the operation amount detection device in the related art, since a rotation shaft provided at the other end of the connection arm is inserted into a housing of the rotation angle sensor, there is a problem that a structure for preventing water and foreign matter from entering the rotation angle sensor is complicated. In addition, there is a problem that it is necessary to machine an attachment hole of the connection arm in the brake lever, and a weight of the connection arm is increased around the brake lever. An object of the disclosure is to provide an operation amount detection device for a vehicle with handlebar that can solve the problem and prevent water and foreign matter from entering a rotation angle sensor with a simple structure and can make a structure around an operator simple and lightweight. Solution to Problem To solve the problem, the disclosure is an operation amount detection device for a vehicle with handlebar in which a pivot fixed to a holder attached to a vehicle body is inserted into one end of a pivot insertion hole of an operator, which is a brake lever, a brake pedal or a clutch lever, and the operator is freely rotatable about an axis of the pivot. The operation amount detection device includes a rotation angle sensor fixed to the holder and a detection shaft fitted into another end of the pivot insertion hole. The operator and the detection shaft co-rotate, and a magnet is provided at an end portion of the detection shaft. A magnetic detection unit of the rotation angle sensor faces the magnet in a non-contact state in an axial direction of the detection shaft, and the magnetic detection unit detects a rotation amount of the magnet. In the operation amount detection device according to the disclosure, the magnetic detection unit is housed in a housing of the rotation angle sensor, and the rotation amount of the magnet of the detection shaft can be detected by the magnetic detection unit in a non-contact manner. With this configuration, since it is not necessary to provide an opening portion for inserting the detection shaft in the housing of the rotation angle sensor, it is possible to prevent water and foreign matter from entering the rotation angle sensor with a simple structure. In addition, since the rotation angle sensor and the detection shaft can be separated, a vibration resistance of the rotation angle sensor can be improved. In the operation amount detection device of the disclosure, since the detection shaft is inserted into the pivot insertion hole of the operator, the detection shaft and the rotation angle sensor can be compactly arranged around the operator and thus the detection shaft can be made lightweight. In addition, since the detection shaft is arranged by using the pivot insertion hole for rotating the operator, it is not necessary to machine a dedicated hole for attaching the detection shaft on the operator. In the above operation amount detection device for the vehicle with handlebar, it is preferable that the holder or the rotation angle sensor is formed with a communication path that communicates a space formed between the holder and the rotation angle sensor with an external space. With this configuration, the water that enters between the holder and the rotation angle sensor can be effectively drained to the external space through the communication pa