JP2016097870A - Brake control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a stroke simulator to be allocated in a cabin.SOLUTION: A stroke simulator 3 includes a cylindrical cylinder 31 coupled to a brake pedal 1 by a pin 4, a shaft 32 that moves in an unified fashion with a piston 21 of a master cylinder 2, and a simulator spring 33 to generate reaction force in a predetermined stroke range. The shaft 32 is configured in a manner being capable of relative movement against the brake pedal 1 and the cylinder 31 by the pin 4 being inserted into a long hole 327. In a region where a pushing down amount of the brake pedal 1 is small, the shaft 32 does not move. When the brake pedal 1 is operated up to the intermediate position, a cylinder second cylindrical part 312 and the opposing face of the spring guide part 322 contact with each other. When the brake pedal 1 is pushed down further, the cylinder 31 and the shaft 32 move in an unified manner, and the master cylinder 2 generates a brake fluid pressure in conjunction with the brake pedal 1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a brake device including a stroke simulator that absorbs a stroke of a brake pedal and generates a reaction force.

  Conventionally, as this type of brake device, for example, there is one described in Patent Document 1. In the brake device described in Patent Document 1, the stroke simulator is accommodated in the master cylinder, or the stroke simulator is provided separately from the master cylinder and disposed in the engine room.

JP 2010-925 A

  However, when the stroke simulator is housed in the master cylinder as in the former case, the master cylinder becomes large, and there is a risk of hindering mounting in a narrow engine room. In addition, when the stroke simulator is provided separately from the master cylinder as in the latter case, there is a risk of hindering mounting in a narrow engine room.

  In view of the above points, an object of the present invention is to make it possible to arrange a stroke simulator in a vehicle interior.

  In order to achieve the above object, according to the first aspect of the present invention, the brake pedal (1) operated by the driver and the pistons (21, 22) are driven by the operation force input to the brake pedal to thereby generate brake fluid. Brake device comprising a master cylinder (2) for generating pressure and a stroke simulator (3) for absorbing a stroke of the brake pedal and generating a reaction force in a predetermined stroke range from the initial position to the intermediate position of the brake pedal The stroke simulator includes a cylindrical cylinder (31) coupled to a brake pedal by a pin (4), a shaft shaft portion (323) inserted into the cylinder, and a shaft flange portion (321) serving as a cylinder. The brake pedal and cylinder are located outside the cylinder and can move relative to the brake pedal and cylinder. A shaft (32) connected to the piston and moving integrally with the piston, and a simulator spring (33) sandwiched between the cylinder and the shaft flange and generating a reaction force within a predetermined stroke range. It is characterized by that.

  According to this, a stroke simulator can be arrange | positioned in a vehicle interior, and the mounting property of a brake device provided with a stroke simulator can be improved.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

It is a figure showing the composition of the brake equipment concerning one embodiment of the present invention. It is a front view of the cylinder of FIG. FIG. 3 is a plan view of FIG. 2. FIG. 3 is a right side view of FIG. 2. It is a front view of the shaft of FIG. FIG. 6 is a plan view of FIG. 5. FIG. 6 is a right side view of FIG. 5.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The brake device of the present embodiment is used as a hydraulic brake device in a vehicle brake device that performs cooperative control using a hydraulic brake device that generates a hydraulic braking force and a regenerative braking device that generates a regenerative braking force. .

  As shown in FIG. 1, the hydraulic brake device includes a stroke simulator 3 that generates a reaction force between a brake pedal 1 that is operated by a driver and a master cylinder 2 that generates brake hydraulic pressure. Yes. The brake pedal 1 and the stroke simulator 3 are coupled by a pin 4.

  The operating force input to the brake pedal 1 is transmitted to the master cylinder 2 via the stroke simulator 3. Note that the brake pedal 1 and the stroke simulator 3 are disposed in the vehicle compartment, and the master cylinder 2 is disposed in the engine room.

  The master cylinder 2 is a tandem type master cylinder partitioned into a primary chamber 23 and a secondary chamber 24 by a primary piston 21 and a secondary piston 22. A push rod 25 connected to the stroke simulator 3 is fixed to the primary piston 21.

  A primary spring 26 that urges the primary piston 21 toward the push rod 25 is disposed in the primary chamber 23. A secondary spring 27 that urges the secondary piston 22 toward the primary chamber 23 is disposed in the secondary chamber 24. The primary chamber 23 and the secondary chamber 24 are connected to a reservoir 28 that stores brake fluid.

  When the driver depresses the brake pedal 1, the primary piston 21 is driven via the stroke simulator 3 and brake fluid is sent out from the primary chamber 23, and the secondary piston 22 is driven and brake fluid from the secondary chamber 24. Will be sent out.

  The brake fluid sent from the primary chamber 23 and the secondary chamber 24 flows into each wheel cylinder (not shown) via a brake fluid pressure control actuator (not shown).

  The stroke simulator 3 includes a cylinder 31, a shaft 32, and a simulator spring 33.

  As shown in FIGS. 1 to 4, the cylinder 31 includes a cylindrical cylinder first cylindrical portion 311 and a cylindrical cylinder second cylindrical portion 312 having an outer diameter smaller than that of the cylinder first cylindrical portion 311. It is formed in series.

  A cylinder first hole 313 is formed in the cylinder first cylindrical portion 311 and the cylinder second cylindrical portion 312 so as to extend along the cylinder axial direction. The shaft 32 is slidably inserted into the cylinder first hole 313.

  The cylinder 31 is formed with a cylinder groove 314 extending along the cylinder axial direction from the end of the cylinder first cylindrical portion 311 to the middle of the cylinder second cylindrical portion 312. The cylinder groove 314 is formed at two places in the vertical direction. Then, the intermediate portion of the brake pedal 1 is inserted into the cylinder groove 34.

  A cylinder second hole 315 extending in the cylinder radial direction and penetrating therethrough is formed in the vicinity of the end of the cylinder first cylindrical portion 311. The cylinder second holes 315 are formed at two places in the horizontal direction. Then, the pin 4 is inserted and fixed in the cylinder second hole 315.

  As shown in FIGS. 1 and 5 to 7, the shaft 32 includes a disc-shaped shaft flange 321 that supports one end of the simulator spring 33 and a cylindrical spring guide that supports the inner peripheral side of the simulator spring 33. A portion 322 and a cylindrical shaft shaft portion 323 that is slidably inserted into the cylinder first hole 313 are formed in series.

  A shaft hole 324 and a shaft female thread portion 325 extending along the shaft axial direction are formed in the shaft flange portion 321, the spring guide portion 322, and the shaft shaft portion 323. Then, one end of the push rod 25 is inserted into the shaft hole 324, and the tip of the push rod 25 is screwed into the shaft female screw portion 325.

  The shaft shaft portion 323 is formed with a shaft groove 326 that extends along the shaft shaft direction from the end of the shaft shaft portion 323 to the middle of the shaft shaft portion 323 and extends in the vertical direction. Then, the intermediate portion of the brake pedal 1 is inserted into the shaft groove 326.

  Near the end of the shaft shaft portion 323, a shaft long hole 327 that penetrates in the shaft radial direction and is elongated in the shaft axial direction is formed. The long shaft holes 327 are formed at two locations in the horizontal direction. The pin 4 is slidably inserted into the shaft long hole 327.

  As shown in FIG. 1, in the stroke simulator 3, the shaft shaft portion 323 is slidably inserted into the cylinder first hole 313, and the simulator spring 33 is sandwiched between the cylinder first cylindrical portion 311 and the shaft flange portion 321. Has been.

  The cylinder 31 and the shaft 32 are biased in the direction in which they are separated by the simulator spring 33. When the brake pedal 1 is not depressed, the cylinder second cylindrical portion 312 and the spring guide portion 322 are urged. The facing surfaces are not in contact with each other (the state shown in FIG. 1). The set load of the simulator spring 33 is set smaller than the set load of the primary spring 26 and the secondary spring 27.

  An intermediate portion of the brake pedal 1 is slidably inserted into the cylinder groove 314 and the shaft groove 326, and an intermediate portion of the pin 4 is formed in a hole (not shown) formed in the intermediate portion of the brake pedal 1 and the shaft long hole 327. The both ends of the pin 4 are inserted and fixed in the cylinder second hole 315. As a result, the brake pedal 1 and the cylinder 31 operate integrally, and the shaft 32 can move relative to the brake pedal 1 and the cylinder 31 in the shaft axial direction.

  The front end of the push rod 25 is screwed into the shaft female thread portion 325 so that the primary piston 21, the push rod 25, and the shaft 32 operate integrally.

  In the above configuration, when the brake pedal 1 is depressed, the brake pedal 1 and the cylinder 31 move forward. Here, the pin 4 is inserted into the shaft long hole 327 so that the shaft 32 can be moved relative to the brake pedal 1 and the cylinder 31 in the shaft axial direction, and the set load of the simulator spring 33 is the primary load. Since it is set smaller than the set load of the spring 26 and the secondary spring 27, the shaft 32 does not move in a region where the amount of depression of the brake pedal 1 is small.

  When the brake pedal 1 is operated to the intermediate position, the opposed surfaces of the cylinder second cylindrical portion 312 and the spring guide portion 322 come into contact with each other.

  Therefore, in a predetermined stroke range from the initial position of the brake pedal 1 to the intermediate position, the brake pedal 1 and the cylinder 31 move forward while compressing the simulator spring 33, and the stroke simulator 3 absorbs the stroke of the brake pedal 1 and reacts. Generate power.

  When the brake pedal 1 is further depressed after the opposed surfaces of the cylinder second cylindrical portion 312 and the spring guide portion 322 are in contact, that is, when the brake pedal 1 is operated beyond the intermediate position, the cylinder 31 and the shaft 32 are moved. Move together.

  Therefore, in a region where the brake pedal 1 is operated beyond the intermediate position, the master cylinder 2 generates brake fluid pressure in conjunction with the brake pedal 1. Specifically, in the master cylinder 2, the primary piston 21 is driven via the shaft 32 as the brake pedal 1 is depressed to increase the pressure in the primary chamber 23, and the secondary piston 22 is driven in the secondary chamber. Increase the pressure of 24.

  Thus, in this embodiment, the stroke simulator 3 is provided between the brake pedal 1 and the push rod 25 installed in the vehicle interior, and the operation force input to the brake pedal 1 is mastered via the stroke simulator 3. The stroke simulator 3 can be arranged in the vehicle interior by transmitting to the cylinder 2.

  Furthermore, since the stroke simulator 3 is configured as a mechanism composed of a set of easily replaceable parts in a small space between the brake pedal 1 and the push rod 25, the mountability of the brake device including the stroke simulator 3 is improved. Can do. More specifically, the stroke simulator 3 can be implemented only by replacing the existing component part, precvis.

  In addition, since the conventional brake device needs to adapt the master cylinder depending on the presence or absence of the stroke simulator, the master cylinder of the brake device using the stroke simulator and the master cylinder of the brake device not using the stroke simulator may be shared. could not.

  On the other hand, in the present embodiment, since the operation force input to the brake pedal 1 is transmitted to the master cylinder 2 via the stroke simulator 3, the master cylinder 2 is turned on regardless of the presence or absence of the stroke simulator 3. Can be shared.

(Other embodiments)
In addition, this invention is not limited to above-described embodiment, In the range described in the claim, it can change suitably.

  Further, in the above-described embodiment, it is needless to say that elements constituting the embodiment are not necessarily indispensable except for the case where it is clearly indicated that the element is essential and the case where the element is clearly considered to be essential in principle. .

  Further, in the above embodiment, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is particularly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to a specific number except for cases.

  In the above embodiment, when referring to the shape, positional relationship, etc. of components, the shape, position, etc., unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to relationships.

1 Brake pedal 2 Master cylinder 3 Stroke simulator 4 Pin 21 Primary piston 22 Secondary piston 31 Cylinder 32 Shaft 33 Simulator spring 321 Shaft flange 323 Shaft shaft

Claims (3)

A brake pedal (1) operated by the driver;
A master cylinder (2) for generating piston hydraulic pressure by driving pistons (21, 22) by operating force input to the brake pedal;
In a predetermined stroke range from an initial position of the brake pedal to an intermediate position, the brake device includes a stroke simulator (3) that absorbs a stroke of the brake pedal and generates a reaction force,
The stroke simulator
A cylindrical cylinder (31) coupled to the brake pedal by a pin (4);
A shaft shaft portion (323) is inserted into the cylinder, a shaft flange portion (321) is located outside the cylinder, and is movable relative to the brake pedal and the cylinder. A shaft (32) connected to the piston and moving integrally with the piston;
A brake device comprising a simulator spring (33) sandwiched between the cylinder and the shaft flange and generating a reaction force in the predetermined stroke range.   A long hole (327) is formed in the shaft shaft portion, and the shaft is configured to be relatively movable with respect to the brake pedal and the cylinder by inserting the pin into the long hole. The brake device according to claim 1.   When the brake pedal is operated to the intermediate position, the opposed surfaces of the cylinder and the shaft contact each other, and when the brake pedal is operated beyond the intermediate position, the cylinder and the shaft move integrally. The brake device according to claim 1 or 2, wherein

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