JP2018058384A - Device for applying reaction force - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a device for applying reaction force capable of restraining spring feeling under operation of a brake pedal and lessening load against a driver under the operation.SOLUTION: The device for applying the reaction force comprises a first movable member which is connected to one of a brake operation member and a piston and includes an opening on other side, a second movable member which is connected to another one of the brake operation member and the piston, of which at least a part is housed in the first movable member and which includes a cam surface having an inclined plane inclining with respect to the first direction so as to taper as heading toward the first movable member, and a pressing member which is provided on the first movable member and elastically presses the cam surface in the direction intersecting with the first direction. It is also configured that the pressing force by the pressing member is divided into a force in the first direction making the first and second movable members separate by the inclined surface and a force in the direction intersecting with the first direction restraining movement of the second movable member as movement of the brake operation member.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a reaction force applying device.

  2. Description of the Related Art Conventionally, there has been known a reaction force applying device that is provided between a brake pedal and a piston of a master cylinder, transmits thrust from the brake pedal to the piston, and applies reaction force by an elastic member (for example, Patent Document 1). .

JP 2012-76688 A

  In the conventional reaction force applying device, the reaction force by the brake pedal is increased according to the operation amount. Further, since the elastic force generated by the brake pedal and the elastic member is in the same direction, the elastic force is always transmitted to the driver through the operation pedal regardless of whether the operation is moving or the operation is being held. . Therefore, the driver feels a spring feeling that the driver directly steps on the elastic member while operating the brake pedal. Further, during the operation holding, the elastic member directly receives the elastic force with respect to the pedaling force, so that it may become a load on the driver and feel fatigue.

  Accordingly, one of the problems of the present invention is a novelty with less inconvenience, for example, it is possible to suppress the feeling of spring during operation of the brake pedal and to further reduce the load on the driver during the holding. It is to obtain a reaction force applying device having a proper configuration.

  The reaction force applying device of the present disclosure is interposed between, for example, a brake operation member and a piston of a master cylinder that moves in a first direction by operation of the brake operation member, and the thrust of the operated brake operation member is applied to the piston. A reaction force applying device that transmits a reaction force to a brake operation member and transmits the first movable member connected to one of the brake operation member and the piston and having an opening on the other side, the brake operation member, and the piston A cam surface having an inclined surface that is connected to the other, is at least partially housed in the first movable member, and is inclined with respect to the first direction so as to taper toward the first movable member. And a second movable member, and a pressing member that is provided on the first movable member and elastically presses the cam surface in a direction crossing the first direction. With the movement, the pressing force by the pressing member intersects the first direction force that separates the first and second movable members by the inclined surface and the first direction that suppresses the movement of the second movable member. Including a configuration that is divided by a force in a direction to perform.

  In the reaction force applying device, the force from the pressing member is divided into a first direction force for separating the first and second movable members and a force for suppressing the movement of the second movable member by the inclined surface. It is powered. According to such a configuration, for example, the reaction force against the pedaling force of the driver is made by the resultant force of the force through the inclined surface and the force that suppresses the movement of the second movable member. It is possible to reduce the feeling of spring that directly steps on the elastic member.

  In the reaction force applying device, for example, the cam surface is in contact with the pressing member in a state where the operation amount of the brake operation member is larger than a state in which the pressing member and the inclined surface are in contact with each other. A second surface having a degree of inclination with respect to the direction smaller than that of the inclined surface, or a state where the operation amount of the brake operation member is smaller than a state where the pressing member and the inclined surface are in contact with each other. A third surface having a smaller inclination with respect to the first direction than the inclined surface. According to such a configuration, for example, when the pressing member presses the surface having a small inclination, the component force in the direction intersecting the first direction that suppresses the movement of the second movable member is relatively increased. Therefore, it is possible to easily maintain the reaction force due to the driver's stepping force.

  In the reaction force applying device, for example, at least two or more inclined surfaces are disposed on the cam surface. According to such a configuration, for example, since the inclined surface and the second surface or the third surface are continuously arranged, it is possible to create a feeling characteristic of an arbitrary brake.

  In the reaction force applying device, for example, the frictional resistance mechanism includes a plurality of pressing members that press the positions separated from each other in the first direction of the cam surface as the pressing member. According to such a configuration, for example, the reaction force can be changed in more stages, so that a finer brake feeling can be created.

  With the movement of the second movable member relative to the first movable member, the two pressing members press the second surface, and the one pressing member presses the second surface and the other A state in which the pressing member presses the inclined surface or the third surface is obtained. Therefore, for example, since the reaction force can be changed in multiple stages by a cam surface having fewer steps, it becomes possible to create a finer brake feeling.

FIG. 1 is a schematic configuration diagram of a brake device according to an embodiment. FIG. 2 is a cross-sectional view showing the structure of the reaction force application device of the first embodiment and a connection structure between peripheral components. FIG. 3 is a cross-sectional view illustrating an internal configuration of the reaction force applying device according to the first embodiment, and illustrates an initial state in which a brake operation member is not operated. FIG. 4 is a cross-sectional view illustrating an internal configuration of the reaction force applying device according to the first embodiment, and is a diagram illustrating a state where the brake operation member is operated and the second movable member is moved in the first direction. . FIG. 5 is a cross-sectional view showing the internal configuration of the reaction force applying device of the first embodiment, in which the brake operation member is operated and moved in the first direction to a position where the second movable member abuts against the buffer member. It is a figure which shows a state. FIG. 6 is a cross-sectional view illustrating an internal configuration of the reaction force applying device according to the second embodiment, and illustrates an initial state where the brake operation member is not operated. FIG. 7 is a cross-sectional view illustrating an internal configuration of the reaction force applying device according to the second embodiment, and is a diagram illustrating a state in which the brake operation member is operated and the second movable member is moved in the first direction. . FIG. 8 is a cross-sectional view showing the internal configuration of the reaction force applying device of the second embodiment, in which the brake operating member is operated and moved in the first direction to a position where the second movable member abuts against the buffer member. It is a figure which shows a state. FIG. 9 is a cross-sectional view showing an internal configuration of the reaction force applying apparatus according to the third embodiment. FIG. 10 is a cross-sectional view illustrating a schematic configuration of a part of the reaction force applying apparatus according to the fourth embodiment. FIG. 11 is a cross-sectional view illustrating a schematic configuration of a part of the reaction force applying apparatus according to the first modification. FIG. 12 is a cross-sectional view showing the internal configuration of the reaction force application apparatus of the fifth embodiment. FIG. 13: is sectional drawing which shows the connection structure of the structure of the reaction force provision apparatus of 6th Embodiment, and peripheral components.

  Hereinafter, exemplary embodiments and modifications of the present invention will be disclosed. The configurations of the embodiments and modified examples shown below, and the operations and results (effects) brought about by the configurations are examples. The present invention can be realized by configurations other than those disclosed in the following embodiments and modifications. According to the present invention, it is possible to obtain at least one of various effects (including derivative effects) obtained by the configuration. Moreover, all the drawings are schematic and illustrative.

  The following embodiments and modifications include similar components. Therefore, in the following, the same reference numerals are given to the same components, and redundant description may be omitted. In the present specification, ordinal numbers are given for the sake of convenience in order to distinguish parts, parts, and the like, and do not indicate priority or order.

  In the following, the front in the vehicle front-rear direction is simply referred to as the front, the rear in the vehicle front-rear direction is simply referred to as the rear, the upper in the vehicle up-down direction is simply referred to as the upper, and the lower in the vehicle vertical direction is simply the lower. It is called. Further, the vehicle front-rear direction is simply referred to as the front-rear direction, and the vehicle vertical direction is simply referred to as the vertical direction.

(First embodiment)
FIG. 1 is a schematic configuration diagram of the brake device 1. As shown in FIG. 1, the brake device 1 includes a brake pedal 2, a master cylinder 3, a reaction force applying device 4, an actuator 6, a wheel cylinder 7, a brake pad (not shown), and a disc rotor 8.

  The brake pedal 2 is disposed in the passenger compartment and is depressed by a driver. The brake pedal 2 is connected to a front reaction force applying device 4. The brake pedal 2 applies a thrust according to the driver's stepping operation to the reaction force applying device 4. The brake pedal 2 is an example of a brake operation member.

  The reaction force applying device 4 is disposed in the vehicle compartment or the engine room and is interposed between the brake pedal 2 and the piston 12 of the master cylinder 3. The reaction force applying device 4 can transmit the thrust received from the brake pedal 2 to the front piston 12. Further, the reaction force applying device 4 can apply a reaction force corresponding to the thrust to the rear brake pedal 2. The reaction force applying device 4 can also be referred to as a stroke simulator.

  The master cylinder 3 is arranged in the engine room. The master cylinder 3 supplies brake fluid to the actuator 6 and thus to the wheel cylinder 7 in accordance with the operation of the pistons 12 and 13. The actuator 6 is interposed between the master cylinder 3 and the wheel cylinder 7. The actuator 6 applies hydraulic pressure (brake hydraulic pressure) to the wheel cylinder 7 based on the stroke amount of the brake pedal 2 and the like. When a brake pad (not shown) is pressed against the disk rotor 8 by the hydraulic pressure of the wheel cylinder 7, a braking force is generated.

  In the example of FIG. 1, the master cylinder 3 is a tandem type. Specifically, the master cylinder 3 includes a cylinder portion 11 (housing) that extends in the axial direction, and two pistons 12 and 13 that are disposed in the cylinder portion 11 so as to be spaced apart from each other in the axial direction. Yes. The piston 12 is coupled to the push rod 16. The piston 12 is connected to the reaction force applying device 4 via a push rod 16. The axial direction of the master cylinder 3 is substantially along the front-rear direction.

  Two chambers 14 and 15 are provided in the cylinder portion 11. The chamber 14 is provided between the piston 12 and the piston 13, and the chamber 15 is provided on the opposite side of the piston 13 from the piston 12. A coil spring 17 is disposed in the chamber 14 to push the piston 12 toward the push rod 16. The chamber 15 is provided with a coil spring 18 that pushes the piston 13 toward the chamber 14. The chambers 14 and 15 are connected to a brake fluid reservoir 19.

  In the master cylinder 3, when the brake pedal 2 is depressed by the driver, the piston 12 pressed by the push rod 16 moves and the brake fluid is sent out from the chamber 14, and the piston 13 is moved by the pressure increase in the chamber 14. The brake fluid is sent out from the chamber 15 by moving. The brake fluid sent out from the chamber 14 and the chamber 15 flows into each wheel cylinder 7 via the actuator 6.

  The master cylinder 3 is connected to a pump 21 provided in the actuator 6. The pump 21 can be driven by a motor 22 provided in the actuator 6 to supply brake fluid into the master cylinder 3 and the wheel cylinder 7. The motor 22 is controlled by the control unit 23 (ECU). The control unit 23 can control the motor 22 based on detection results of a sensor (not shown) that detects the stroke amount of the brake pedal 2 and a sensor (not shown) that detects the pressure in the master cylinder 3. That is, the control unit 23 can control the actuator 6 based on the operation of the brake pedal 2. As an example, the control unit 23 can control the motor 22 so as to be in a pre-pressurized state in which the inside of the wheel cylinder 7 is pressurized to a prescribed hydraulic pressure by supplying brake fluid from the pump 21. .

  A differential pressure control valve 25 is provided in the oil passage 24 between the master cylinder 3 and the wheel cylinder 7. The differential pressure control valve 25 is an electromagnetic valve configured to be able to control the differential pressure between the hydraulic pressure on the master cylinder 3 side and the hydraulic pressure on the wheel cylinder 7 side.

  The actuator 6 is a known mechanism including, for example, a differential pressure control valve 25, a pressure reducing electromagnetic valve 26, a pressure increasing electromagnetic valve 27, a reservoir 28, a pump 21, and a motor 22. By controlling each valve, motor 22 and the like by the control unit 23, the actuator 6 controls the inflow of the brake fluid into the wheel cylinder 7 and the outflow of the brake fluid from the wheel cylinder 7. Adjust pressure.

  FIG. 2 is a cross-sectional view showing a connection structure between the configuration of the reaction force applying device 4 of the present embodiment and peripheral components. As shown in FIG. 2, the reaction force applying device 4 has two movable members 41 and 42. The movable member 41 is connected to the piston 12 of the master cylinder 3. The movable member 42 is connected to the brake pedal 2. The movable member 41 is provided with a bottomed internal space that extends substantially along the front-rear direction (left-right direction in FIG. 2) and is open to the brake pedal 2 side (rear). The movable member 42 is accommodated in the internal space of the movable member 41 so as to be able to reciprocate. At the bottom of the internal space, that is, at the front end, a buffer member 46 is provided to reduce an impact when the movable member 41 and the movable member 42 hit the front-rear direction. The buffer member 46 is, for example, an elastomer. The movable member 41 is an example of a first movable member, and the movable member 42 is an example of a second movable member. The movable member 42 moves forward (leftward in FIG. 2) with respect to the movable member 41 in accordance with an increase in the operation amount of the brake pedal 2. An arrow X in each figure shows an example of the first direction. In the present specification, the first direction indicates the front-rear direction, that is, the X direction and the opposite direction. Note that the operation amount of the brake pedal 2 does not indicate the operation amount of each operation of the brake pedal 2 by the driver, but indicates a difference with respect to the initial position of the current position of the brake pedal 2.

  3 to 5 are cross-sectional views showing the internal structure of the reaction force applying device 4. FIG. 3 is an initial state where the brake pedal 2 is not depressed, and FIG. 4 is a movable member when the brake pedal 2 is depressed. FIG. 5 shows a state in which 42 is moved forward (leftward in FIG. 4), and FIG. 5 shows a state in which the brake pedal 2 is stepped on and the movable member 42 is moved forward to a position where it abuts against the buffer member 46. The movable member 41 has a case 41a that forms an internal space. The moving direction of the movable member 42 in the internal space is the front-rear direction. In the present embodiment, as an example, the bottom of the case 41a is positioned forward (leftward in FIG. 3), and the side wall (circumferential wall) extends from the bottom toward the rear (rightward in FIG. 3). That is, the case 41a is opened toward the rear.

  As shown in FIG. 3, the sub-case 41 b protrudes from the case 41 a in a direction (hereinafter referred to as a crossing direction) that intersects the moving direction of the movable member 42 (hereinafter referred to as a moving direction). . In the present embodiment, as an example, the sub case 41b protrudes upward from the case 41a. The interior of the sub case 41b is opened to the internal space of the case 41a, and the tip of the sub case 41b is closed by a plug such as a screw, for example. In the present embodiment, the sub case 41b extends upward (upward in FIG. 3) from the case 41a.

  The frictional resistance mechanism 44 includes a pressing member 44a and a coil spring 44b provided in the sub case 41b. The pressing member 44a is accommodated in the sub case 41b so as to be movable in the crossing direction. The coil spring 44b can be expanded and contracted between the tip (bottom, plug) of the sub case 41b and the pressing member 44a, and elastically biases the pressing member 44a toward the internal space of the case 41a. That is, the coil spring 44b is compressed between the sub case 41b and the pressing member 44a, thereby giving an elastic compression reaction force to the pressing member 44a. In the present embodiment, as an example, the coil spring 44 b elastically presses the pressing member 44 a downward and presses it against the cam surface 43. The coil spring 44b can be referred to as an urging member or an elastic member. The front end surface of the pressing member 44a has a ruled surface shape having a generatrix along the vehicle width direction, for example, a cylindrical surface shape. An arrow Y in each figure shows an example of the second direction.

  The movable member 42 is provided with a cam surface 43 that slides with the pressing member 44a. When the pressing member 44 a pressed by the coil spring 44 b and the cam surface 43 slide, a frictional force is generated between the tip surface of the pressing member 44 a and the cam surface 43. That is, a frictional resistance force according to the perpendicular force with respect to the cam surface 43 by the pressing member 44 a acts on the movable member 42. Further, when the movable member 42 is pressed by the pressing member 44a, the surface 42c of the movable member 42 opposite to the cam surface 43 is pressed against the inner surface 41c of the case 41a opposite to the sub case 41b. Therefore, even between the surface 42c and the inner surface 41c, a frictional resistance force according to the vertical force based on the pressing force of the movable member 42 by the pressing member 44a acts on the movable member 42.

  Here, the cam surface 43 includes a plurality of surfaces 43a to 43c having different inclination angles with respect to the moving direction and the intersecting direction. The cam surface 43 extends substantially along the moving direction. Of the three surfaces 43a to 43c, the surface 43a located at the center in the movement direction has the largest inclination angle (hereinafter referred to as an inclination angle) with respect to the movement direction. The surface 43a is inclined so as to be separated from the surface 42c as it approaches the brake pedal 2. That is, the surface 43a is such that the coil spring 44b is compressed and the compression reaction force of the coil spring 44b is increased as the movable member 42 moves forward (leftward in FIG. 3, X direction) in accordance with the operation of the brake pedal 2. Inclined. In addition, the inclination angles of the surfaces 43b and 43c located on both sides of the surface 43a are smaller than those of the surface 43a. Therefore, in a state where the pressing member 44a is in contact with the surfaces 43b and 43c, the reaction force that the movable member 42 receives from the pressing member 44a rearward (rightward in FIG. 3, opposite to the X direction) is the surface 43b, The inclination angle of 43c is smaller than when the inclination angle of the surface 43a is the same. The inclination angle of the surface 43b and the inclination angle of the surface 43c may be substantially the same or different. The surface 43a is an example of a first surface (inclined surface), the surface 43b is an example of a second surface, and the surface 43c is an example of a third surface. The surface 43a can also be referred to as a steep slope, and the surfaces 43b and 43c can also be referred to as gentle slopes. The surface 43a forms a tapered shape toward the front. The angle of the surfaces 43b and 43c may be 0 (zero). Further, the cam surface 43 (the surfaces 43a to 43c) may be entirely tapered.

  As shown in FIG. 3, in a state where the movable member 42 is located at the initial position P0, the pressing member 44a contacts the surface 43c, and as shown in FIG. 4, the movable member 42 is at the first position P1. When positioned, the pressing member 44a contacts the surface 43a. As shown in FIG. 5, when the movable member 42 is positioned at the second position P2, the pressing member 44a contacts the surface 43b. Yes. As described above, since the inclination angles of the surfaces 43b and 43c are relatively small, when the pressing member 44a slides on the surfaces 43b and 43c, the pressing force of the pressing member 44a in the moving direction (front-rear direction). The component is relatively small. As will be apparent from FIGS. 3 to 5, the surfaces 43 a to 43 c are sections in which the pressing member 44 a slides within the normal operation range of the brake pedal 2.

  3, the reaction force applying mechanism 45 includes a slit 42a provided in the movable member 42 and extending in the front-rear direction, and a slider 45b (pin) accommodated in the slit 42a so as to be movable in the front-rear direction. And a coil spring 45a interposed between the slider 45b and the end 42b of the slit 42a in the slit 42a. The slider 45 b is fixed to the movable member 41. Accordingly, as shown in FIGS. 3 to 5, the coil spring 45 a and the end portion 42 b are moved by the movement of the movable member 42 forward (leftward in FIGS. 3 to 5) according to the operation of the brake pedal 2. And elastically compressed in the front-rear direction, and gives a compressive reaction force to the movable member 42 in the backward direction (rightward in FIGS. 3 to 5, opposite to the X direction). The coil spring 45a can be referred to as an urging member or an elastic member.

  With this configuration, in this embodiment, the reaction force is applied in the state shown in FIG. 5, that is, in the state where the operation amount of the brake pedal 2 is larger than the state where the pressing member 44 a is in contact with the surface 43 a (FIG. 4). The frictional resistance mechanism 44 applies a forward frictional resistance force to the backward reaction force applied to the brake pedal 2 by the mechanism 45, and the reaction force is alleviated. Therefore, according to the present embodiment, for example, the operation range in which the reaction force is alleviated when the driver loosens the depression force (operation force) of the brake pedal 2 can be set wider. Therefore, the load on the driver due to the reaction force is further reduced. Further, since the reaction force characteristic by the reaction force applying device 4 with respect to the stroke of the brake pedal 2 approaches the reaction force characteristic by the master cylinder 3, there is an advantage that the driver's uncomfortable feeling is reduced.

  3 to 5, as the operation amount of the brake pedal 2 increases, the coil spring 45a of the reaction force application mechanism 45 becomes shorter, and the brake pedal 2 by the reaction force application mechanism 45 becomes clearer. The reaction force against is increasing.

  Here, as is apparent from a comparison between FIG. 3 and FIG. 5, the length of the coil spring 44b of the friction resistance mechanism 44 in the state of FIG. 5 is equal to the length of the coil spring 44b of the friction resistance mechanism 44 in the state of FIG. Shorter than the length of. That is, the frictional resistance force applied to the movable member 42 in the state of FIG. 5 where the operation amount of the brake pedal 2 is larger is the frictional resistance force applied to the movable member 42 in the state of FIG. 3 where the operation amount of the brake pedal 2 is smaller. Bigger than.

  With this configuration, in the present embodiment, the greater the amount of operation of the brake pedal 2, the greater the backward reaction force applied to the brake pedal 2 by the reaction force applying mechanism 45, whereas the frictional resistance mechanism 44. As a result, the frictional resistance applied to the movable member 42 also increases. Therefore, when the driver loosens the depression force of the brake pedal 2 in a state where the pressing member 44a is in contact with the surface 43c (a state close to the state of FIG. 3), that is, the driver loosens the depression force and holds the brake pedal 2. When the movable member 42 moves backward (rightward in FIGS. 3 to 5, opposite to the X direction) when the driver returns the brake pedal, the brake pedal 2 is relatively small. The reaction force is attenuated by a relatively small frictional resistance. In addition, when the driver loosens the pedal force of the brake pedal 2 in a state where the pressing member 44a is in contact with the surface 43b (the state shown in FIG. 5), a relatively large reaction acting on the brake pedal 2 is performed. The force is attenuated by a relatively large frictional resistance. Therefore, in this embodiment, the force from the pressing member 44a is caused by the inclined surface, and the force in the first direction that separates the movable members 41 and 42 (first and second movable members) and the second movable member. It is divided into the force which suppresses movement. According to such a configuration, for example, the reaction force against the pedaling force of the driver is a force through an inclined surface such as the surface 43a and a force that suppresses the movement of the movable member 42 (a force that causes sliding resistance). Since it is made by the resultant force, it is possible to reduce the feeling of spring for directly stepping on the elastic member during the conventional operation movement. Moreover, according to this embodiment, the difference according to the operation amount (position of the brake pedal 2) of the reaction force that acts on the brake pedal 2 when the pedal force of the brake pedal 2 is loosened becomes smaller. Therefore, according to the present embodiment, for example, the reaction force that acts when the driver relaxes the pedaling force can be set to a lower value in a wider range, so that the load on the driver due to the reaction force is further increased. It is further reduced.

  Further, the cam surface abuts against the pressing member 44a in a state where the operation amount of the brake pedal 2 (brake operation member) is larger than the state where the pressing member 44a and the surface 43a (inclined surface) abut, and the X direction (first And the pressing member 44a in a state in which the operation amount of the brake pedal 2 is smaller than the state in which the pressing member 44a and the surface 43a are in contact with each other. It includes a surface 43c (third surface) that abuts and has a smaller degree of inclination with respect to the X direction than the surface 43a. According to such a configuration, for example, when the pressing member 44a presses the surfaces 43b and 43c having a small inclination, the X direction (first direction) that suppresses the movement of the movable member 42 (second movable member). ) In the direction intersecting with) is relatively increased, so that the reaction force due to the driver's stepping force can be easily maintained.

(Second Embodiment)
6 to 8 are cross-sectional views showing the internal configuration of the reaction force applying device 4A of the present embodiment. FIG. 6 is an initial state where the brake pedal 2 is not stepped on, and FIG. FIG. 8 shows a state in which the movable member 42 has moved forward (leftward in FIG. 7), and FIG. 8 shows a state in which the brake pedal 2 has been stepped on and the movable member 42 has moved forward to a position where it hits the buffer member 46.

  The reaction force application device 4A has the same configuration as the reaction force application device 4 of the first embodiment. Also with the reaction force application device 4 </ b> A of the present embodiment, the same actions and effects based on the same configuration as the reaction force application device 4 can be obtained. In addition, 4 A of reaction force provision apparatuses of this embodiment also have the reaction force provision mechanism 45 (not shown in FIGS. 6-8) similar to 1st Embodiment.

  However, in this embodiment, the movable member 41 </ b> A includes another frictional resistance mechanism 44 </ b> A in parallel with the frictional resistance mechanism 44. The two frictional resistance mechanisms 44, 44A are spaced apart in the front-rear direction (left-right direction in FIGS. 6-8, X direction), and the pressing members 44a of the two frictional resistance mechanisms 44, 44A are respectively cam surfaces 43. Press the positions separated from each other in the front-rear direction.

  As shown in FIG. 6, in a state where the movable member 42 is located at the initial position P0, the pressing member 44a of the frictional resistance mechanism 44 and the pressing member 44a of the frictional resistance mechanism 44A are in contact with the surface 43c, as shown in FIG. As shown, when the movable member 42 is located at the first position P1, the pressing member 44a of the frictional resistance mechanism 44 is in contact with the surface 43b, and the pressing member 44a of the frictional resistance mechanism 44A is in contact with the surface 43c. As shown in FIG. 8, when the movable member 42 is located at the second position P2, the pressing member 44a of the frictional resistance mechanism 44 and the pressing member 44a of the frictional resistance mechanism 44A are in contact with the surface 43b. . As will be apparent from the length of the coil spring 44b in FIGS. 6 to 8, also in this embodiment, the frictional resistance acting on the movable member 42 in a state where the pressing member 44a is in contact with the surface 43b is the pressing member. The friction resistance force acting on the movable member 42 in a state where 44a is in contact with the surface 43c is larger. Therefore, according to the present embodiment, the magnitude of the frictional resistance force acting on the movable member 42 can be made different at the three positions of the initial position P0, the first position P1, and the second position P2. it can. It can be said that such a change in the frictional resistance is caused by a difference in the position of the movable member 42 where the frictional resistance changes in the two frictional resistance mechanisms 44 and 44A.

  Further, the reaction force by the reaction force applying mechanism 45 increases linearly with respect to the change in the operation amount of the brake pedal 2, whereas the friction resistance force by the friction resistance mechanisms 44 and 44A changes stepwise. Therefore, the reaction force acting on the brake pedal 2 when the driver relaxes the pedal force, that is, the reaction force obtained by reducing the reaction force by the reaction force applying mechanism 45 by the friction resistance force by the friction resistance mechanisms 44 and 44A, It changes while increasing / decreasing with respect to the change of the operation amount of the brake pedal 2. Therefore, according to the configuration in which the reaction force by the frictional resistance mechanisms 44, 44A changes in more stages as in the present embodiment, for example, the cam surface 43 has a surface 43a (inclined surface) and a surface 43b (second surface). ), Or the surface 43c (third surface) is continuously arranged, so that it is possible to create an arbitrary brake feeling characteristic. Further, when the driver relaxes the pedaling force, the increase / decrease width of the reaction force acting on the brake pedal 2 can be further reduced.

  Further, according to the present embodiment, since the plurality of frictional resistance mechanisms 44 and 44A are provided, the reaction force by the frictional resistance mechanisms 44 and 44A can be changed in multiple stages by the cam surface 43 with fewer steps. This makes it possible to create a more detailed brake feeling. Moreover, according to this embodiment, when the driver relaxes the pedaling force, the increase / decrease width of the reaction force acting on the brake pedal 2 can be further reduced.

(Third embodiment)
FIG. 9 is a cross-sectional view showing the internal configuration of the reaction force application device 4B of the present embodiment. The reaction force application device 4B has the same configuration as the reaction force application device 4A of the second embodiment. Also with the reaction force application device 4B of the present embodiment, the same action and effect based on the same configuration as the reaction force application device 4A can be obtained. Note that the reaction force application device 4B of the present embodiment also has a reaction force application mechanism 45 (not shown in FIG. 9) similar to that of the first embodiment.

  However, in this embodiment, the movable member 42B has another cam surface 43B on the side opposite to the cam surface 43, and the movable member 41B has another friction resistance mechanism on the side opposite to the friction resistance mechanism 44. 44B. The pressing member 44a of the frictional resistance mechanism 44B presses the cam surface 43B. The frictional resistance mechanism 44B can apply a frictional resistance force to the movable member 42B by pressing the cam surface 43B with the pressing member 44a.

  In the present embodiment, the positions of the surfaces 43a to 43c on the cam surface 43 and the positions of the surfaces 43a to 43c on the cam surface 43B are shifted in the front-rear direction (X direction, first direction). Also with such a configuration, the position of the movable member 42B where the frictional resistance force changes between the frictional resistance mechanism 44 and the frictional resistance mechanism 44B can be varied. Therefore, according to the present embodiment, the same effects as those of the second embodiment can be obtained by such features.

  Furthermore, in this embodiment, the position where the pressing member 44a of the frictional resistance mechanism 44 presses the cam surface 43 and the position where the pressing member 44a of the frictional resistance mechanism 44B presses the cam surface 43B are shifted in the front-rear direction. Also with such a configuration, the position of the movable member 42B where the frictional resistance force changes between the frictional resistance mechanism 44 and the frictional resistance mechanism 44B can be varied. Therefore, according to the present embodiment, the same effect as that of the second embodiment can be obtained even by such a feature.

(Fourth embodiment)
FIG. 10 is a cross-sectional view showing a schematic configuration of a part of the reaction force application device 4C of the present embodiment. The reaction force applying device 4C has the same configuration as the reaction force applying device 4A of the second embodiment. Also with the reaction force application device 4C of the present embodiment, similar actions and effects based on the same configuration as the reaction force application device 4A can be obtained. Note that the reaction force application device 4 </ b> C of the present embodiment also has a reaction force application mechanism 45 (not shown in FIG. 10) similar to that of the first embodiment.

  However, in the present embodiment, the cam surface 43C has a surface 43d (second surface or third surface) forming a plurality of steps, and the movable member 41C has a plurality of friction resistance mechanisms 44, 44A, 44C, 44D. Have According to such a configuration, the frictional resistance force applied to the movable member 42 </ b> C by the frictional resistance mechanisms 44, 44 </ b> A, 44 </ b> C, 44 </ b> D changes in multiple stages according to the position of the brake pedal 2. That is, according to this embodiment, the same effect as that of the second embodiment can be obtained. In addition, according to the present embodiment, for example, the reaction force can be changed in more stages, so that a finer brake feeling can be created.

(First modification)
FIG. 11 is a cross-sectional view showing a schematic configuration of a part of the reaction force application device 4D according to this modification. The reaction force application device 4D has the same configuration as the reaction force application device 4C of the fourth embodiment. Also with the reaction force application device 4D of the present embodiment, similar actions and effects based on the same configuration as the reaction force application device 4C can be obtained. Note that the reaction force application device 4D of the present embodiment also has a reaction force application mechanism 45 (not shown in FIG. 11) similar to that of the first embodiment.

  However, in the present embodiment, each of the surfaces 43d (second surface or third surface) constituting the step of the cam surface 43D is provided with a recess 43e that is recessed downward (cross direction, Y direction). . As the pressing member 44a is held in the front-rear direction by the recess 43e, the frictional resistance acting on the movable member 42D is likely to increase. Therefore, according to the present embodiment, for example, the frictional resistance can be obtained more reliably, or the coil spring 44b of the frictional resistance mechanism 44, 44A, 44C can be further reduced, and as a result, the frictional resistance mechanism 44, 44A, 44C. It is possible to obtain an effect such that the size can be further reduced.

(Fifth embodiment)
FIG. 12 is a cross-sectional view showing the internal configuration of the reaction force application device 4E of this embodiment. The reaction force application device 4E has the same configuration as the reaction force application device 4A of the second embodiment. Also with the reaction force application device 4E of the present embodiment, the same actions and effects based on the same configuration as the reaction force application device 4A can be obtained.

  However, in the present embodiment, at least one of the two frictional resistance mechanisms 44 and 44A (in this example, the frictional resistance mechanism 44) also functions as the reaction force applying mechanism 45. The moving direction of the cam surface 43 (front-rear direction, X) so that the friction resistance mechanism 44 functions as the reaction force applying mechanism 45, that is, the reaction force to the brake pedal 2 is obtained by pressing the cam surface 43 by the pressing member 44a. The inclination with respect to (direction) is set to be larger than those of the other embodiments and modifications. According to such a configuration, for example, since the reaction force applying mechanism 45 can be integrated with the frictional resistance mechanisms 44 and 44A, the number of parts can be reduced, and the reaction force applying device 4E can be further downsized. The effect is obtained.

(Sixth embodiment)
FIG. 13 is a diagram showing a connection structure between the configuration of the reaction force applying apparatus 4F of this embodiment and peripheral components. The reaction force application device 4F has the same configuration as the reaction force application device 4 of the first embodiment. Also with the reaction force application device 4F of the present embodiment, similar actions and effects based on the same configuration as the reaction force application device 4 can be obtained.

  However, in this embodiment, the movable member 42 having the cam surface 43 is connected to the piston 12 of the master cylinder 3, supports the movable member 42 so as to be movable in the front-rear direction, and has the friction resistance mechanism 44. Is connected to the brake pedal 2. Even with such a configuration, the same effect as in the above embodiment can be obtained. In the present embodiment, the arrow X is the reverse of the other embodiments and modifications.

  As mentioned above, although embodiment and the modification of this invention were illustrated, the said embodiment and modification are an example to the last, Comprising: It is not intending limiting the range of invention. The above-described embodiments and modifications can be implemented in various other forms, and various omissions, replacements, combinations, and changes can be made without departing from the spirit of the invention. In addition, the specifications (structure, type, direction, shape, size, length, width, thickness, height, number, arrangement, position, material, etc.) of each configuration, shape, etc. are appropriately changed. Can be implemented.

  For example, the moving direction of the pressing member of the frictional resistance mechanism and the pressing direction of the cam surface by the pressing member are not limited to the lower side, and may be, for example, the rear side and the lower side (diagonally downward), or the lateral direction ( Vehicle width direction) and the like. Further, the biasing member (elastic member) of the frictional resistance mechanism or the reaction force applying mechanism may be other than the coil spring.

  DESCRIPTION OF SYMBOLS 1 ... Brake device, 2 ... Brake pedal (brake operation member), 3 ... Master cylinder, 4, 4A-4F ... Reaction force imparting device, 12 ... Piston, 41 ... Movable member (first movable member), 42 ... Movable Member (second movable member), 43 ... cam surface, 43a ... surface (first surface), 43b ... surface (second surface), 43c ... surface (third surface), 43d ... surface (second) Surface, third surface), 43e ... concave portion, 44, 44A to 44D ... friction resistance mechanism, 44a ... pressing member, 45 ... reaction force applying mechanism.

Claims (6)

It is interposed between the brake operating member and the piston of the master cylinder that moves in the first direction by the operation of the brake operating member, and transmits the thrust of the operated brake operating member to the piston, and to the brake operating member A reaction force applying device for applying a reaction force,
A first movable member connected to one of the brake operating member and the piston and having an opening on the other side;
The first direction is connected to the other of the brake operation member and the piston, and at least a part of the brake operation member and the piston are accommodated in the first movable member and taper toward the first movable member. A second movable member having a cam surface having an inclined surface inclined with respect to
A pressing member provided on the first movable member and elastically pressing the cam surface in a direction intersecting the first direction;
Along with the movement of the brake operation member, the pressing force by the pressing member causes the force in the first direction to separate the first and second movable members by the inclined surface, and the movement of the second movable member. A reaction force imparting device divided by a force in a direction crossing the first direction.   The cam surface is in contact with the pressing member in a state where the operation amount of the brake operation member is larger than the state in which the pressing member and the inclined surface are in contact with each other, and the inclination with respect to the first direction is greater than that of the inclined surface. The reaction force applying apparatus according to claim 1, further comprising a second surface that is smaller than the second surface.   The cam surface is in contact with the pressing member in a state where the operation amount of the brake operation member is smaller than the state in which the pressing member and the inclined surface are in contact with each other, and the inclination with respect to the first direction is higher than that of the inclined surface. The reaction force imparting device according to claim 2, further comprising a third surface that is smaller.   The reaction force applying device according to any one of claims 1 to 3, wherein at least two of the inclined surfaces are disposed on the cam surface.   The reaction force applying device according to any one of claims 1 to 4, wherein the pressing member includes at least two or more pressing members that press positions separated from each other in the first direction of the cam surface.   With the movement of the second movable member relative to the first movable member, the two pressing members press the second surface, and the one pressing member presses the second surface and the other The reaction force applying device according to claim 3, wherein the pressing member presses the inclined surface or the third surface.

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