Simulator assembly and braking system

Abstract

The application relates to the brake technical field and discloses a simulator assembly and a brake system. A guide piece connected to a simulator shell is arranged in the simulator shell, a guide cavity is formed between the guide piece and the inner wall of the simulator shell, the guide cavity is communicated with an oil injection hole and a guide opening, the flow direction of pressure oil sent into a pressure cavity through the oil injection hole is changed by the guide piece provided with the guide opening, the fluid medium in the guide cavity exerts force on the working surface of a simulator piston along the axial direction of the simulator piston through the guide opening, the radial resultant force of the pressure oil in the pressure cavity on the simulator piston is reduced or even eliminated, the force on the simulator piston in the radial direction is more balanced, the friction between the simulator piston and the simulator shell during the axial movement of the simulator piston is reduced, the axial movement of the simulator piston is smoother, the wear of the simulator piston and the simulator shell caused by the axial movement of the simulator piston is reduced, and the service life of the simulator assembly is prolonged.

Description

Technical Field

[0001] This invention relates to the field of braking technology, and more particularly to a simulator component and braking system. Background Technology

[0002] The braking system includes a pedal simulator. When the brake pedal is pressed, the simulator piston of the master cylinder moves, and the master cylinder sends pressurized oil into the pedal simulator. The simulator piston of the pedal simulator moves, and the damping element inside the pedal simulator buffers the movement of the simulator piston, thereby providing the driver with a feel.

[0003] The pedal simulator includes a simulator housing and a simulator piston that slides inside the simulator housing. The simulator piston divides the inner cavity of the simulator housing into two oil chambers, namely a pressure chamber and a buffer chamber. The simulator housing is provided with an oil injection hole that communicates with the pressure chamber. The oil injection hole is connected to the brake master cylinder through an internal oil passage.

[0004] Specifically, the simulator housing includes a main body and a cover plate. One end of the receiving cavity is open. The main body is provided with a receiving groove with one end open. The simulator piston is located in the receiving groove. A pressure chamber is formed between the bottom wall of the receiving groove and the simulator piston. An oil injection hole is located on the bottom wall of the receiving groove. A buffer chamber is formed between the simulator piston and the cover plate. A damping element is located in the buffer chamber.

[0005] To prevent the simulator piston from sticking tightly to the bottom wall of the groove due to the viscosity of the pressurized oil, a boss that can abut against the bottom wall of the groove is usually set at the center of the simulator piston. When the boss abuts against the bottom wall of the groove, an annular oil cavity is formed between the outer peripheral wall of the boss and the inner peripheral wall of the receiving groove. At this time, the oil injection hole is set at the position of the annular oil cavity formed by the bottom wall of the groove, so as to increase the contact area between the pressurized oil in the pressure cavity and the simulator piston and prevent the simulator piston from being stuck due to viscosity.

[0006] When the brake pedal is depressed, pressurized oil supplied by the master cylinder enters the annular oil chamber through the injection port at a high pressure and flow rate, gradually filling the annular oil chamber. Due to the high pressure and flow rate of the pressurized oil entering the annular oil chamber through the injection port, the pressurized oil, while filling the annular oil chamber, exerts an uneven radial force on the simulator piston as it acts on the boss. This radial force causes the simulator piston to press tightly against the inner wall of the simulator housing, increasing the friction between the simulator piston and the inner wall of the simulator housing during piston movement. This leads to easy wear of the sliding mating surfaces between the simulator piston and the simulator housing, shortening the service life of the pedal simulator. Summary of the Invention

[0007] The purpose of this invention is to provide a simulator assembly and braking system that can reduce the wear of the sliding contact surfaces between the simulator piston and the simulator housing, thereby extending the service life of the pedal simulator.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] A simulator component, comprising:

[0010] The simulator housing is provided with an oil injection port, which allows fluid media to enter and exit;

[0011] A simulator piston is movably disposed within the simulator housing along its axial direction, and a pressure chamber with variable volume is formed between the simulator piston and the simulator housing, the pressure chamber being connected to the fuel injection port;

[0012] Also includes:

[0013] A guide component is disposed within the pressure chamber and connected to the simulator housing; the guide component is provided with at least one guide port.

[0014] The guide member is configured to form a guide cavity between itself and the inner wall of the simulator housing. The guide cavity connects the oil injection hole and the guide port. The fluid medium applies a force to the working surface of the simulator piston along the axial direction of the simulator piston through the guide port.

[0015] As an optional technical solution for the aforementioned simulator components, the guide includes:

[0016] A guide plate, wherein the guide plate is provided with the guide opening, the guide opening being axially disposed through the guide plate; and...

[0017] A spacer is located on the side of the guide plate opposite to the simulator piston to form the guide cavity.

[0018] As an optional technical solution for the above-mentioned simulator components, the spacer is connected to the guide plate, or the spacer is connected to the inner wall of the simulator housing.

[0019] As an optional technical solution for the above-mentioned simulator components, at least two spacers are provided, and the at least two spacers are arranged at intervals along the circumference of the guide plate.

[0020] As an optional technical solution for the aforementioned simulator components, the guide further includes:

[0021] A guide rib protrudes from the guide cavity and is connected to the guide plate or the simulator housing. The guide rib is arranged radially across the guide opening.

[0022] As an optional technical solution for the above-mentioned simulator component, it includes a guide port coaxial with the guide plate; the guide rib is arranged to intersect the axis of the guide port.

[0023] As an optional technical solution for the above-mentioned simulator component, the guide plate includes two first sector areas and two second sector areas. The two first sector areas are symmetrically arranged around the axis of the guide plate, and the two second sector areas are symmetrically arranged around the axis. The first sector areas and the second sector areas form a semicircle.

[0024] The projection of the oil injection hole on the guide plate is in the first sector area, the spacer is located in the second sector area, and when there is one guide rib, the two ends of the guide rib fall into the two first sector areas respectively, and the central angle of the first sector area is less than 45°.

[0025] As an optional technical solution for the above-mentioned simulator component, it includes a plurality of guide ports arranged at circumferential intervals along the guide plate, each guide port being correspondingly provided with a guide rib, the guide rib extending radially along the guide plate. As an optional technical solution for the above-mentioned simulator component, the projection of the guide rib on the guide plate is a first projection, and the projection of the oil injection hole on the guide plate is a second projection, the second projection being located on the extension line of the first projection.

[0026] As an optional technical solution for the above-mentioned simulator component, the end of the guide rib is formed with a tip, each tip having two guide ramps, and the projection of the two guide ramps on the guide plate is V-shaped.

[0027] As an optional technical solution for the above-mentioned simulator component, the guide plate has an oil reservoir on the end face of the simulator piston facing the simulator piston and / or the axial end face of the simulator piston facing the guide plate, and the oil reservoir is connected to the guide port.

[0028] As an optional technical solution for the above-mentioned simulator components, the oil storage tank is disposed on the guide plate, and the guide port is disposed through the bottom wall of the oil storage tank.

[0029] As an optional technical solution for the above-mentioned simulator components, the working surface of the simulator piston is a plane.

[0030] As an optional technical solution for the above-mentioned simulator components, the guide is detachably connected to the simulator housing.

[0031] As an optional technical solution for the above-mentioned simulator components, the guide is threadedly connected to the simulator housing.

[0032] To achieve the above objectives, the present invention also provides a braking system, including a brake master cylinder and a simulator component as described in any of the above embodiments;

[0033] The master cylinder is connected to the injection port of the simulator assembly, and the master cylinder is used to supply pressurized oil to the pressure chamber through the injection port.

[0034] The beneficial effects of this invention are as follows: The simulator assembly and braking system provided by this invention have a guide member connected to the simulator housing inside the simulator housing. A guide cavity is formed between the guide member and the inner wall of the simulator housing. The guide cavity connects the oil injection hole and the guide port. By setting the guide member with the guide port, the flow direction of the pressure oil sent into the pressure chamber through the oil injection hole is changed, so that the fluid medium in the guide cavity applies a force to the working surface of the simulator piston along the axial direction of the simulator piston through the guide port. This reduces or even eliminates the radial resultant force of the pressure oil in the pressure chamber acting on the simulator piston, making the simulator piston more evenly stressed in the radial direction. This reduces the friction between the simulator piston and the simulator housing during the axial movement of the simulator piston, making the axial movement of the simulator piston smoother. At the same time, it reduces the wear of the simulator piston and the simulator housing caused by the axial movement of the simulator piston, and extends the service life of the simulator assembly.

[0035] Furthermore, regardless of whether the injection port is coaxial with the simulator piston, the flow direction of the pressure oil sent into the pressure chamber through the injection port can be changed by setting a guide component for the guide port, so that the pressure oil in the pressure chamber acts on the simulator piston along the simulator piston axis, reducing the positional requirements of the injection port.

[0036] By using guide ribs to suppress the rotating flow of pressure oil in the guide cavity and changing the flow direction of pressure oil in the guide cavity, the spiral flow of pressure oil is transformed into laminar flow. This effectively prevents the spiral flow of pressure oil from entering the working cavity through the guide port and generating a radial force on the simulator piston that causes uneven radial force on the simulator piston.

[0037] When the guide port and guide plate are set coaxially, the guide rib and the axis of the guide port are intersected, so that the guide port and the simulator piston are coaxial. The pressure oil entering the working chamber through the guide port will flow evenly from the center of the simulator piston to the surrounding area, so that the radial force of the pressure oil in the working chamber acting on the simulator piston is very small or even eliminated.

[0038] Multiple guide ports are arranged circumferentially around the guide plate, and each guide port is equipped with a guide rib. This allows the pressure oil entering the working chamber through the guide port to flow evenly from the periphery of the simulator piston to the center of the simulator piston. This arrangement will also reduce or even eliminate the radial force that causes uneven radial force on the simulator piston when the pressure oil in the working chamber acts on the simulator piston.

[0039] The working surface of the simulator piston is a plane, eliminating the protruding structure on the simulator piston in the prior art, thereby effectively avoiding uneven radial force on the simulator piston when the pressure oil entering the working chamber acts on the simulator piston. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of the simulator component provided in an embodiment of the present invention;

[0042] Figure 2 This is a cross-section of the simulator component provided in the embodiments of the present invention. Figure 1 ;

[0043] Figure 3 This is a cross-section of the simulator component provided in the embodiments of the present invention. Figure 2 ;

[0044] Figure 4 This is a schematic diagram of the guide provided in an embodiment of the present invention. Figure 1 ;

[0045] Figure 5 This is a diagram showing the positional relationship between the guide ribs, injection holes, and guide ports provided in an embodiment of the present invention.

[0046] Figure 6 This is a schematic diagram of the guide provided in an embodiment of the present invention. Figure 2 ;

[0047] Figure 7 This is a schematic diagram of the simulator housing provided in an embodiment of the present invention;

[0048] Figure 8 This is a diagram showing the positional relationship between the guide rib, the injection hole, and the guide port provided in another embodiment of the present invention;

[0049] Figure 9 This is a diagram showing the positional relationship between the guide rib, the injection hole, and the guide port provided in another embodiment of the present invention;

[0050] Figure 10 This is a cross-sectional view of the guide component provided in an embodiment of the present invention;

[0051] Figure 11 This is a cross-sectional view of a guide provided in another embodiment of the present invention.

[0052] In the picture:

[0053] 1. Simulator housing; 11. Oil injection hole; 12. Shaft end cavity wall; 13. Circumferential inner wall; 14. Second projection;

[0054] 2. Simulator piston;

[0055] 3. Guide component; 31. Guide plate; 32. Guide port; 321. Oil reservoir; 33. Guide rib; 331. Guide ramp; 34. Spacer;

[0056] 4. Damping elements;

[0057] 5. Sealing components;

[0058] 10. Guiding cavity; 20. Acting cavity; 30. Buffer cavity; 40. Plane of symmetry. Detailed Implementation

[0059] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0060] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0061] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0062] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0063] like Figures 1 to 3 As shown, this embodiment provides a simulator component and a braking system. The braking system includes a simulator component and a master cylinder. When the brake pedal is pressed, the master cylinder supplies oil to the simulator component, which in turn provides the driver with pedal feel.

[0064] The simulator assembly includes a simulator housing 1 and a simulator piston 2. The simulator housing 1 has an oil injection port 11. The simulator piston 2 is movably disposed within the simulator housing 1 along its axial direction, dividing the inner cavity of the simulator housing 1 into a pressure chamber and a buffer chamber 30. A damping element 4 is disposed within the buffer chamber 30. The oil injection port 11 communicates with the pressure chamber to allow fluid to enter and exit the pressure chamber. The brake master cylinder can deliver pressurized oil into the pressure chamber through the oil injection port 11, which acts on the simulator piston 2. After the pressurized oil enters the pressure chamber, as the brake pedal is pressed deeper, the oil pressure increases, causing the simulator piston 2 to move axially, allowing the damping element 4 to provide a buffering force, thus generating a pedal feel. It should be noted that the damping element 4 is typically a spring and / or rubber. The specific installation of the damping element 4 is prior art and will not be described in detail here.

[0065] In this embodiment, the inner wall of the simulator housing 1, which forms the pressure chamber, has a shaft end cavity wall 12 perpendicular to the axial direction of the simulator piston 2. An oil injection hole 11 is located on the shaft end cavity wall 12, and the oil injection hole 11 is not coaxial with the simulator piston 2. It should be noted that the oil injection hole 11 can also be coaxially arranged with the simulator piston 2.

[0066] Optionally, the injection port 11 is located near the circumferential edge of the simulator piston 2. When the brake master cylinder sends pressurized oil into the pressure chamber through the injection port 11, the pressurized oil supplied by the brake master cylinder has a large oil pressure and flow rate. When the injection port 11 is not coaxial with the simulator piston 2, the pressurized oil entering the pressure chamber not only generates an axial force on the simulator piston 2 that causes it to move axially, but also generates a radial force on the simulator piston 2 that causes uneven radial force. This increases the friction between the simulator piston 2 and the mating surface of the simulator housing 1 when the simulator piston 2 moves, making the mating surface prone to wear and shortening the service life of the simulator assembly.

[0067] Therefore, the simulator assembly provided in this embodiment also includes a guide member 3. The guide member 3 is disposed within the pressure chamber and connected to the simulator housing 1. The guide member 3 has at least one guide port 32. The guide member 3 is configured to form a guide cavity 10 between itself and the inner wall of the simulator housing 1. The guide cavity 10 connects the oil injection hole 11 and the guide port 32. The fluid medium applies a force to the working surface of the simulator piston 2 along the axial direction of the simulator piston 2 through the guide port 32. It should be noted that the working surface of the simulator piston 2 refers to the axial end face of the simulator piston 2 facing the guide member 3. When oil enters through the oil injection hole 11, when pressurized oil enters between the guide plate 31 and the simulator piston 2 through the guide port 32, the pressurized oil acts on the working surface. When the force applied by the pressurized oil to the working surface increases to a certain extent, the simulator piston 2 will move axially away from the guide plate 31. Exemplarily, the fluid medium is pressurized oil.

[0068] In the simulator assembly provided in this embodiment, pressurized oil enters the guide cavity 10 through the oil injection hole 11. The pressurized oil in the guide cavity 10 enters the space between the simulator piston 2 and the guide plate 31 through the guide port 32, so that the pressurized oil applies a force to the working surface of the simulator piston 2 along the axial direction of the simulator piston 2. This reduces or even eliminates the radial resultant force of the pressurized oil in the pressure cavity acting on the simulator piston 2, making the force on the simulator piston 2 more balanced in its radial direction. It also reduces the friction between the simulator piston 2 and the simulator housing 1 during the axial movement of the simulator piston 2, making the axial movement of the simulator piston 2 smoother. At the same time, it reduces the wear of the simulator piston 2 and the simulator housing 1 caused by the axial movement of the simulator piston 2, and extends the service life of the simulator assembly.

[0069] Furthermore, regardless of whether the injection port 11 is coaxial with the simulator piston 2, the flow direction of the pressure oil sent into the pressure chamber through the injection port 11 can be changed by the guide member 3 with the guide port 32. The pressure oil in the guide chamber 10 is introduced into the chamber between the simulator piston 2 and the guide plate 31 by the guide port 32, and the pressure oil acts on the working surface of the simulator piston 2 along the axial direction of the simulator piston 2, which reduces the positional requirements of the injection port 11.

[0070] The following example uses the misalignment of the fuel injection port 11 and the simulator piston 2 as an example, combined with... Figures 1 to 7 The structure of guide component 3 is described in detail. It should be noted that when the injection port 11 and the simulator piston 2 are coaxial, Figures 1 to 7 The guide 3 shown is also applicable.

[0071] The guide member 3 of this embodiment includes a guide plate 31 and a spacer 34. The guide plate 31 is provided with the aforementioned guide port 32, which is disposed through the axial direction of the guide plate 31. The spacer 34 is located on the side of the guide plate 31 away from the simulator piston 2 to form a guide cavity 10. Specifically, the space between the shaft end cavity wall 12 and the guide plate 31 forms the aforementioned guide cavity 10.

[0072] In this embodiment of the invention, the spacer 34 is connected to the guide plate 31. Exemplarily, the spacer 34 and the guide plate 31 are integrally formed, which is simple to process and low in cost. In other embodiments, the spacer 34 can also be connected to the inner wall of the simulator housing 1, such as fixing the spacer 34 to the shaft end cavity wall 12 of the simulator housing 1.

[0073] In this embodiment of the invention, the guide plate 31 and the simulator housing 1 are detachably connected, making installation convenient and quick. Exemplarily, the guide member 3 and the simulator housing 1 are threadedly connected. The guide member 3 can be assembled or disassembled by screwing the guide plate 31. The guide plate 31 is installed in place when the spacer 34 abuts against the shaft end cavity wall 12. Specifically, in this embodiment, an external thread is provided on the outer peripheral wall of the guide plate 31, and an internal thread is provided on the circumferential inner wall 13 of the simulator housing 1. The internal and external threads engage to connect the guide member 3 to the simulator housing 1.

[0074] Since the guide plate 31 is connected to the simulator housing 1, when the pressurized oil enters the guide cavity 10 through the oil injection hole 11, the guide plate 31 will not move due to uneven force. Even if there is a large radial force when the pressurized oil in the guide cavity 10 acts on the guide plate 31, since the guide plate 31 and the simulator housing 1 are relatively fixed, it will not affect the guide plate 31 and the simulator housing 1.

[0075] When the braking system is not in operation, the simulator piston 2 abuts against the guide plate 31 under the action of the damping element 4. When the braking system is engaged, the pressurized oil supplied by the master cylinder is first injected into the guide cavity 10 through the injection hole 11, instead of acting directly on the simulator piston 2. The pressurized oil in the guide cavity 10 flows radially from the circumferential edge of the guide plate 31 to the guide port 32 at the center of the guide plate 31. The guide port 32 adjusts the flow direction of the pressurized oil to flow axially along the simulator piston 2. The pressurized oil in the guide port 32 will apply a force to the working surface of the simulator piston 2 along the axial direction of the simulator piston 2. The guide plate 31 is fixed because it is connected to the simulator housing 1. The simulator piston 2 is pushed by the pressurized oil to move towards the side where the damping element 4 is located, so that the gap between the guide plate 31 and the simulator piston 2 gradually increases, thereby forming an action cavity 20 between the guide plate 31 and the simulator piston 2.

[0076] In this embodiment of the invention, the spacer 34 is an arc-shaped rib extending circumferentially along the edge of the guide plate 31. To prevent the spacer 34 from blocking the oil injection hole 11, multiple spacers 34 are provided, arranged circumferentially along the guide plate 31, for example, evenly spaced, and the oil injection hole 11 can be located between two adjacent spacers 34. Exemplarily, two spacers 34 are provided, and the two spacers 34 are symmetrically arranged at 180° with respect to the guide plate 31.

[0077] It should be noted that the number of spacers 34 is not limited to two; one, three, four, or more can also be used. The shape of the spacers 34 is not limited to an arc-shaped structure; they can also be columnar, plate-shaped, etc. The spacers 34 are not limited to being connected to the guide plate 31; they can also be connected to the simulator housing 1. For example, the spacers 34 can be connected to the shaft end cavity wall 12 or the circumferential inner wall 13 of the guide cavity 10, with the spacers 34 abutting against the guide plate 31 to limit the guide plate 31. The spacers 34 are not limited to being located on the edge of the guide plate 31; they can be located at any position on the guide plate 31 that does not obstruct the oil-blocking hole 11 and the guide opening 32. It can be understood that the shape, position, and size of the spacers 34 are not limited to the examples above, as long as they can isolate the guide plate 31 from the shaft end cavity wall 12 of the simulator housing 1.

[0078] To improve the stability of the connection between the guide 3 and the simulator housing 1, the outer peripheral wall of the spacer 34 contacts the circumferential inner wall 13, and the outer peripheral wall of the spacer 34 is provided with an external thread that engages with the internal thread of the circumferential inner wall 13 of the simulator housing 1.

[0079] Furthermore, due to the complexity of the oil path from the master cylinder to the injection port 11, this oil path is not a straight line but goes through multiple turns. As a result, the pressure oil from the master cylinder to the injection port 11 will go through multiple turns. This may cause the pressure oil injected into the guide cavity 10 from the injection port 11 to generate a spiral flow along the axis of the simulator piston 2. The spiral flow of the pressure oil along the axis of the simulator piston 2 will, to a certain extent, increase the radial force acting on the simulator piston 2, causing uneven radial force on the simulator piston 2.

[0080] In embodiments of the present invention, such as Figure 4As shown, the guide member 3 further includes a guide rib 33, the guide rib 33 is protruded in the guide cavity 10, the guide rib 33 is connected to the guide plate 31, and the guide rib 33 is arranged across the guide port 32 along the radial direction of the guide port 32. The guide rib 33 is used to suppress the rotational flow of the pressure oil in the guide cavity 10, change the flow direction of the pressure oil in the guide cavity 10, and realize changing the spiral flow of the pressure oil into laminar flow, thereby effectively avoiding that after the spiral-flowed pressure oil enters the acting cavity 20 through the guide port 32, it generates a radial resultant force on the simulator piston 2 that causes uneven radial stress on the simulator piston 2. Illustratively, the guide rib 33 abuts against the shaft end cavity wall 12 of the simulator housing 1, so as to improve the effect of suppressing the rotational flow of pressure oil in the guide cavity 10 by using the guide rib 33. In other embodiments, the guide rib 33 can also be connected to the simulator housing 1, and in this case, the guide rib 33 can abut against the guide plate 31.

[0081] Optionally, the guide port 32 is arranged coaxially with the guide plate 31, and the guide rib 33 is arranged intersecting with the axis of the guide port 32. Illustratively, the guide port 32 is a circular hole. The guide port 32 can also be a rectangular hole, etc., which will not be exemplified one by one here. Since the guide port 32 is coaxial with the guide plate 31, and the guide plate 31 is arranged in the simulator housing 1, the guide plate 31 is coaxial with the simulator piston 2, so that the guide port 32 is coaxial with the simulator piston 2. The pressure oil entering the acting cavity 20 through the guide port 32 will flow uniformly from the center of the simulator piston 2 to the surroundings, so that the radial resultant force of the pressure oil in the acting cavity 20 acting on the simulator piston 2 is very small or even eliminated, realizing that the friction force generated between the simulator piston 2 and the simulator housing 1 is very small or even possibly zero, enabling the simulator piston 2 to reciprocate more smoothly in the simulator housing 1, meanwhile reducing the wear between the simulator piston 2 and the simulator housing 1 when the simulator piston 2 moves axially, and prolonging the service life of the simulator assembly.

[0082] Illustratively, as Figure 5 shown in the embodiment, one guide rib 33 is provided, the guide rib 33 is symmetrically arranged about a symmetry plane 40, the central axis of the guide plate 31 lies on the symmetry plane 40, the guide port 32 is symmetrically arranged about the symmetry plane 40, and the extending direction of the guide rib 33 is parallel to the symmetry plane 40. In other embodiments, the guide rib 33 can also include two forming Figure 9 the cross-shaped structure shown, or include four forming a "meter"-shaped structure, or more. It should be noted that, as Figure 9 shown in the embodiment, when at least two guide ribs 33 are provided, a plurality of first projections intersect at an intersection point, and the intersection point is located on the central axis of the guide port 32.

[0083] In other embodiments, as Figure 8As shown, multiple guide ports 32 can also be provided, and the multiple guide ports 32 are arranged circumferentially around the guide plate 31. Each guide port 32 is provided with a guide rib 33. The guide rib 33 extends radially or circumferentially along the guide plate 31. In this way, the pressure oil entering the working chamber 20 from the guide port 32 flows evenly from the periphery of the simulator piston 2 to the center of the simulator piston 2. This setting will also reduce or even eliminate the radial force that causes the simulator piston 2 to be subjected to uneven radial force when the pressure oil in the working chamber 20 acts on the simulator piston 2.

[0084] Optionally, the guide rib 33 is spaced apart from the circumferential inner wall 13 of the simulator housing 1. This arrangement allows the pressure oil to fill the entire guide cavity 10 and reduces the turbulence caused by the guide rib 33.

[0085] Optionally, such as Figure 5 As shown, the guide plate 31 includes two first sector-shaped regions and two second sector-shaped regions. The two first sector-shaped regions are symmetrically arranged around the axis of the guide plate 31, and the two second sector-shaped regions are also symmetrically arranged around the axis of the guide plate 31. The first and second sector-shaped regions form a semicircle. The projection of the oil injection hole 11 onto the guide plate 31 is within the first sector-shaped region, and the spacer 34 is located within the second sector-shaped region. When the guide rib 33 is provided, its two ends fall into the two first sector-shaped regions respectively. The central angle α of the first sector-shaped region is less than 45° to improve the effect of the guide rib 33 in blocking the spiral flow of pressurized oil. For example, refer to... Figure 5 The smaller the central angle α of the first sector region, the better the blocking effect of the guide rib 33. Optionally, the angle α can be any value among 40°, 35°, 30°, 25°, 20°, 15°, 10°, and 5°.

[0086] Optionally, the length of the guide rib 33 is L1, the maximum length of the guide opening 32 along the length direction of the guide rib 33 is L2, and the maximum length of the guide cavity 10 along the length direction of the guide rib 33 is L3. Optionally, the length of L1 can be and Any value in the range. Specifically, in this embodiment of the invention, the guide port 32 is a circular opening, and the guide plate 31 is a circular plate. Therefore, L2 can be understood as the diameter of the circular opening, and L3 can be understood as the diameter of the guide plate 31. Optionally, the value range of L1 is 15mm-25mm, the value range of L2 is 5mm-8mm, and the value range of L3 is 35mm-42mm. For example, L1 = 20mm, L2 = 6mm, and L3 = 34mm.

[0087] Optionally, such as Figure 5As shown, the projection of the guide rib 33 onto the guide plate 31 is the first projection, and the projection of the oil injection hole 11 onto the guide plate 31 is the second projection 14. The second projection 14 is... Figure 5 In the area shown by the dashed line, the second projection 14 is located on the extension line of the first projection. This arrangement allows the pressurized oil entering the guide cavity 10 through the injection hole 11 to be divided into two parts by the guide rib 33, which then enter the guide port 32 from the guide ports 32 on both sides of the guide rib 33. This improves the technical effect of the guide rib 33 blocking the spiral flow of pressurized oil and turning the spiral flow of pressurized oil into a laminar flow entering the guide port 32.

[0088] Optionally, the guide rib 33 has a pointed end with two guide ramps 331, the projections of which onto the guide plate 31 form a V-shape. This configuration allows the guide ramps 331 to guide the flow, ensuring that the pressurized oil entering the guide cavity 10 through the oil injection hole 11 flows smoothly into the guide ports 32 on both sides of the guide rib 33. Alternatively, each end of the guide rib 33 has a pointed end, and each pointed end has a guide ramp 331 on each of its two sides facing the circumferential inner wall 13 of the simulator housing 1. The two guide ramps 331 of each pointed end are smoothly connected to further improve the flow guiding effect of the guide ramps 331.

[0089] Furthermore, in this embodiment of the invention, the working surface of the simulator piston 2 is a plane, eliminating the protrusion structure on the simulator piston 2 in the prior art, thereby effectively preventing the pressure oil entering the working chamber 20 from generating a radial force on the simulator piston 2 that causes uneven radial force on the simulator piston 2.

[0090] When the braking system is not in operation, the simulator piston 2 abuts against the guide plate 31 under the action of the damping element 4. The simulator piston 2 and the guide plate 31 are in surface contact. When braking, initially only the area of ​​the guide port 32 facing the simulator piston 2 is in contact with the pressure oil. The area of ​​pressure oil acting on the simulator piston 2 is small. Considering the viscosity of the pressure oil, to avoid the simulator piston 2 getting stuck due to the viscosity of the pressure oil at the start of braking, which would prevent the pedal simulation component from starting in time, an oil reservoir 321 is provided on the end face of the guide plate 31 facing the simulator piston 2. The oil reservoir 321 is configured to communicate with the guide port 32 when the guide plate 31 and the axial end face of the simulator piston 2 are in contact.

[0091] This configuration increases the contact area between the pressurized oil and the axial end face of the simulator piston 2 at the moment braking begins, thereby increasing the axial force exerted by the pressurized oil on the simulator piston 2 and preventing the simulator piston 2 from getting stuck due to the viscosity of the pressurized oil at the beginning of braking.

[0092] For example, such as Figure 10As shown, an oil reservoir 321 is located on the side of the guide plate 31 facing the simulator piston 2. A guide port 32 penetrates the bottom wall of the oil reservoir 321. The oil reservoir 321 and the guide port 32 are coaxially arranged to form a stepped hole. The larger diameter end of the stepped hole forms the oil reservoir 321. The stepped hole is a circular hole. The axial length of the oil reservoir 321 is H, and the value of H ranges from 0.4 mm to 0.6 mm. Optionally, the axial length H of the oil reservoir 321 can be any one of 0.4 mm, 0.5 mm, and 0.6 mm.

[0093] In other embodiments, such as Figure 11 As shown, a conical hole extending axially can also be provided on the guide plate 31. This conical hole is the guide port 32. The large-diameter end of the conical hole is located on the side where the damping element 4 is located, and the small-diameter end of the conical hole is located on the side where the guide rib 33 is located, so that the large-diameter end of the conical hole forms an oil storage groove 321 with an oil storage function. An annular oil groove coaxial with the guide port 32 can also be provided on the axial end face of the guide plate 31 facing the simulator piston 2, and multiple radial oil grooves are evenly spaced circumferentially extending radially along the guide plate 31. The two ends of the radial oil grooves are respectively connected to the annular oil groove and the guide port 32 to form an oil storage groove 321 that is rotationally symmetrical about the central axis of the guide port 32.

[0094] In other embodiments, the oil reservoir 321 may be provided on the axial end face of the simulator piston 2 facing the guide plate 31, or the oil reservoir 321 may be provided on both the axial end face of the guide plate 31 facing the simulator piston 2 and the axial end face of the simulator piston 2 facing the guide plate 31.

[0095] Furthermore, to prevent pressurized oil from flowing between the pressure chamber and the buffer chamber 30 through the gap between the outer peripheral wall of the simulator piston 2 and the circumferential inner wall 13 of the simulator housing 1 during the axial movement of the simulator piston 2, thereby affecting the pedal feel, a sealing element 5 is provided between the simulator piston 2 and the simulator housing 1. For example, the outer peripheral wall of the simulator piston 2 is provided with a sealing ring groove, and the sealing element 5, such as an O-ring or a sealing cup, is disposed within the sealing ring groove, and the sealing element 5 is sandwiched between the outer peripheral wall of the simulator piston 2 and the circumferential inner wall 13 of the simulator housing 1.

[0096] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A simulator component, comprising: The simulator housing (1) is provided with an oil injection hole (11) which allows fluid medium to enter and exit. The simulator piston (2) is movably disposed in the simulator housing (1) along its axial direction. A pressure chamber with variable volume is formed between the simulator piston (2) and the simulator housing (1). The pressure chamber is connected to the oil injection hole (11). Its characteristic is that it further includes: The guide (3) is located inside the pressure chamber and connected to the simulator housing (1). The guide (3) is provided with at least one guide port (32). The guide (3) is configured to form a guide cavity (10) between itself and the inner wall of the simulator housing (1). The guide cavity (10) connects the oil injection hole (11) and the guide port (32). The fluid medium applies a force to the working surface of the simulator piston (2) along the axial direction of the simulator piston (2) through the guide port (32). The guide (3) includes: A guide plate (31) is provided with a guide opening (32), the guide opening (32) being axially penetrating the guide plate (31); and, Spacer (34) is located on the side of the guide plate (31) away from the simulator piston (2) to form the guide cavity (10). Guide rib (33), the guide rib (33) protrudes into the guide cavity (10), the guide rib (33) is connected to the guide plate (31) or the simulator housing (1), the guide rib (33) is arranged across the guide port (32) radially.

2. The simulator component according to claim 1, characterized in that, The spacer (34) is connected to the guide plate (31), or the spacer (34) is connected to the inner wall of the simulator housing (1).

3. The simulator component according to claim 1, characterized in that, At least two spacers (34) are provided, and at least two spacers (34) are arranged at intervals along the circumference of the guide plate (31).

4. The simulator component according to claim 1, characterized in that, It includes a guide port (32) coaxially arranged with the guide plate (31); the guide rib (33) is arranged intersecting the axis of the guide port (32).

5. The simulator component according to claim 4, characterized in that, The guide plate (31) includes two first sector areas and two second sector areas. The two first sector areas are symmetrically arranged around the axis of the guide plate (31), and the two second sector areas are symmetrically arranged around the axis. The first sector areas and the second sector areas form a semicircle. The projection of the oil injection hole (11) on the guide plate (31) is in the first sector area, the spacer (34) is located in the second sector area, and when the guide rib (33) is provided, the two ends of the guide rib (33) fall into the two first sector areas respectively, and the central angle of the first sector area is less than 45°.

6. The simulator component according to claim 1, characterized in that, The guide includes a plurality of guide ports (32) arranged circumferentially along the guide plate (31), each guide port (32) being provided with a guide rib (33), the guide rib (33) extending radially along the guide plate (31).

7. The simulator component according to any one of claims 4 to 6, characterized in that, The projection of the guide rib (33) on the guide plate (31) is the first projection, and the projection of the oil injection hole (11) on the guide plate (31) is the second projection (14). The second projection (14) is located on the extension line of the first projection.

8. The simulator component according to claim 1, characterized in that, The end of the guide rib (33) is formed with a tip, the tip having two guide ramps (331), the projection of the two guide ramps (331) on the guide plate (31) is V-shaped.

9. The simulator component according to claim 1, characterized in that, The guide plate (31) has an oil reservoir (321) on the end face of the simulator piston (2) and / or the axial end face of the simulator piston (2) is provided with the guide plate (31), and the oil reservoir (321) is connected to the guide port (32).

10. The simulator component according to claim 9, characterized in that, The oil storage tank (321) is located on the guide plate (31), and the guide port (32) is provided through the bottom wall of the oil storage tank (321).

11. The simulator component according to any one of claims 1 to 6, characterized in that, The working surface of the simulator piston (2) is a plane.

12. The simulator component according to claim 11, characterized in that, The guide (3) is detachably connected to the simulator housing (1).

13. The simulator component according to claim 12, characterized in that, The guide (3) is threadedly connected to the simulator housing (1).

14. A braking system, characterized in that, Includes a brake master cylinder and a simulator assembly as described in any one of claims 1 to 13; The master brake cylinder is connected to the oil injection port (11) of the simulator assembly, and the master brake cylinder is used to supply pressurized oil to the pressure chamber through the oil injection port (11).

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