Brake-by-wire pedal simulator system

Abstract

The utility model relates to a brake-by-wire pedal simulator system, which belongs to the field of automobile brake and comprises an oil path block with a groove, a simulator shell is fixed at the groove, a simulator piston is mounted in the groove in a sliding manner, an oil inlet path communicated with the groove is arranged on the oil path block, and a disc spring group is arranged in the simulator shell; a first piston and a second piston are arranged in the main cylinder in a sliding mode, a first cavity is formed between the first piston and the second piston, one end of a main cylinder push rod is fixedly connected to the first piston, the other end of the main cylinder push rod extends out of the main cylinder and is fixedly connected with a pedal, and the first cavity is communicated with an oil inlet path through a first pipeline. The brake device has the advantages that integration of parts is achieved to the maximum extent, the brake device can be integrated into a brake-by-wire one box to achieve feedback of pedal feeling for a whole vehicle, and meanwhile a hydraulic system can be built through a main cylinder and a peripheral pipeline system to achieve basic brake backup; feedback of different elastic forces is achieved through combination of the disc spring sets, and therefore the pedal feeling is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile brake, concretely is a kind of brake-by-wire pedal simulator system. BACKGROUND

[0002] Brake-by-wire system is a kind of electronic control brake system, it realizes brake control by electronic signal transmission, completely cut off the physical connection between pedal and brake system in traditional brake system.Brake-by-wire system is mainly divided into two types: electronic hydraulic brake (EHB) system and electronic mechanical brake (EMB) system.

[0003] Since there is no direct connection between brake disc and pedal of brake-by-wire system, pedal feeling simulator needs to be added to simulate the brake pedal feeling with vacuum booster.The existing pedal feeling simulator structure is complex, it is difficult to adjust for different situations, and it is inconvenient to use. INVENTION CONTENTS

[0004] The utility model provides a kind of pedal simulator system of higher integration, can be individually adjusted simulator.

[0005] The utility model solves the technical scheme as follows to the above technical problem: a kind of brake-by-wire pedal simulator system, comprising:

[0006] Oil passage block, recess is set in one side of the oil passage block, simulator shell is spliced and fixed at the recess, simulator piston is slidably installed in the recess, oil inlet is also set in the oil passage block and is communicated with recess, disc spring group is arranged in the simulator shell, simulator push rod is arranged on the side of the disc spring group towards the simulator piston, simulator push rod passes through the top wall of the simulator shell and is fixedly connected with the simulator piston;

[0007] Master cylinder, first piston and second piston are slidably arranged in the master cylinder in sequence, it is first chamber between the first piston and second piston, it is second chamber between the second piston and the bottom of the inside of the master cylinder, one end of master cylinder push rod is fixedly connected on the first piston, the other end of master cylinder push rod is fixedly connected with pedal and is stretched out from the side of the master cylinder away from second chamber and is fixedly connected with pedal;

[0008] Oil can, first liquid supplementing pipeline and second liquid supplementing pipeline are connected to the side wall of the oil can, the first liquid supplementing pipeline is communicated with the first chamber, and the second liquid supplementing pipeline is communicated with the second chamber.

[0009] The utility model discloses beneficial effect is: maximum realization of the integration of parts, and this system can be integrated into line control dynamic one box, realizes the feedback of pedal feeling for whole car, can also establish hydraulic system through master cylinder and peripheral pipeline system, realizes to basic braking backup, can also be used alone, provides the feedback of brake pedal feeling for the vehicle of equipping EMB;

[0010] Realize the feedback of different elasticity through the combination of disc spring group, thereby realizing pedal feeling, and the whole pedal feedback system is completely sealed in the inside of hydraulic system, and is independent with traditional basic braking parts such as brake, brake pipeline etc., and does not influence each other, therefore when needing to adjust pedal feeling, can adjust simulator assembly alone, can realize the adjustment of pedal feeling, and is not influenced by brake pipeline, brake and other parts, realizes the decoupling function of brake pedal feeling regulation.

[0011] On the basis of the above technical scheme, the utility model still can make following improvement.

[0012] Further, the oil passage block is also provided with an oil immersion passage, one end of the oil immersion passage is communicated with the simulator shell, and the other end is communicated with the second liquid supplementing pipeline through a second pipeline.

[0013] The beneficial effect of the above further scheme is that the simulator shell is connected with the oil pot, so that the simulator is permanently immersed in brake fluid, which is beneficial to rust prevention and heat dissipation protection of the product, and reduces the wear and mechanical loss of the product brake.

[0014] Further, the first liquid supplementing pipeline is provided with a first control valve.

[0015] The beneficial effect of the above further scheme is to control the on-off of the first liquid supplementing pipeline.

[0016] Further, the first liquid supplementing pipeline is provided with a first control valve.

[0017] The beneficial effect of the above further scheme is that the oil liquid can be continuously supplemented, and the one-way arrangement prevents the backflow of oil liquid.

[0018] Further, the first pipeline is provided with a second control valve.

[0019] The beneficial effect of the above further scheme is to control the on-off of the first pipeline.

[0020] Further, the second chamber is provided with a master cylinder pressure sensor.

[0021] The beneficial effect of the above further scheme is to facilitate real-time monitoring of the internal pressure of the master cylinder.

[0022] Further, the master cylinder push rod is provided with a stroke sensor.

[0023] The beneficial effect of the further scheme is that the ratio of the experimental depression depth and the pedal feedback force is facilitated.

[0024] Further, the simulator shell and the oil passage block are provided with a steel wire collar at the joint.

[0025] The beneficial effect of the further scheme is that the product manufacturing difficulty is reduced, the product production rhythm is improved, the steel wire without surface treatment is adopted, and the environmental pollution is reduced.

[0026] Further, the simulator shell and the oil passage block are provided with an O-shaped sealing ring at the joint.

[0027] The beneficial effect of the further scheme is that the sealing is facilitated, and the oil leakage is prevented.

[0028] Further, the simulator piston outer peripheral wall is provided with a sealing leather cup.

[0029] The beneficial effect of the further scheme is that the simulator piston outer peripheral wall and the inner wall of the groove of the oil passage block are sealed, which helps to store the oil pressure and drive the simulator piston to move. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a whole schematic view of the utility model.

[0031] In the drawings, the components represented by each reference numeral are listed as follows:

[0032] 1, oil passage block; 2, simulator shell; 3, simulator piston; 4, oil inlet passage; 5, disc spring group; 6, simulator push rod; 7, master cylinder; 8, first piston; 9, second piston; 10, master cylinder push rod; 11, pedal; 12, first spring; 13, second spring; 14, first pipeline; 15, oil can; 16, first liquid supplement pipeline; 17, second liquid supplement pipeline; 18, oil immersion passage; 19, second pipeline; 20, first control valve; 21, bypass passage; 22, one-way valve; 23, second control valve; 24, master cylinder pressure sensor; 25, stroke sensor; 26, steel wire collar; 27, O-shaped sealing ring; 28, sealing leather cup. DETAILED DESCRIPTION

[0033] The principles and characteristics of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and are not used to limit the scope of the utility model.

[0034] Example 1

[0035] As Figure 1As shown, a brake-by-wire pedal simulator system comprises:

[0036] An oil passage block 1 is provided with a groove on one side, a simulator housing 2 is fixed to the groove, a simulator piston 3 is slidably installed in the groove, an oil inlet passage 4 is provided on the oil passage block 1 and communicates with the groove, a disc spring set 5 is arranged in the simulator housing 2, a simulator push rod 6 is arranged on the side of the disc spring set 5 facing the simulator piston 3, and the simulator push rod 6 penetrates through the top wall of the simulator housing 2 and is fixedly connected with the simulator piston 3;

[0037] A master cylinder 7 is provided with a first piston 8 and a second piston 9 slidably arranged in sequence, a first chamber is formed between the first piston 8 and the second piston 9, a second chamber is formed between the second piston 9 and the bottom of the inner side of the master cylinder 7, one end of a master cylinder push rod 10 is fixedly connected to the first piston 8, the other end of the master cylinder push rod 10 extends out of the master cylinder 7 from the side of the master cylinder 7 away from the second chamber and is fixedly connected with a pedal 11, a first spring 12 is arranged between the first piston 8 and the second piston 9, and a second spring 13 is arranged between the second piston 9 and the bottom of the inner side of the master cylinder 7, and the first chamber communicates with the oil inlet passage 4 through a first pipeline 14;

[0038] An oil can 15 is connected with a first liquid supplementing pipeline 16 and a second liquid supplementing pipeline 17 on the side wall, the first liquid supplementing pipeline 16 communicates with the first chamber, and the second liquid supplementing pipeline 17 communicates with the second chamber.

[0039] The embodiment has the beneficial effect of maximizing the integration of parts, the system can be integrated into a brake-by-wire one box to realize pedal feeling feedback for the whole vehicle, a hydraulic system can be established through the master cylinder and the surrounding pipeline system to realize backup for the basic brake, and the system can also be used alone to provide brake pedal feeling feedback for vehicles equipped with EMB;

[0040] Different feedback forces are realized through the combination of the disc spring set 5 to realize pedal feeling, and the whole pedal feedback system is completely sealed inside the hydraulic system and is independent of and does not affect traditional basic brake parts such as brakes and brake pipelines, so when the pedal feeling needs to be adjusted, the simulator assembly can be adjusted alone to realize the adjustment of the pedal feeling and is not affected by brake pipelines, brakes and other parts, and the decoupling function of brake pedal feeling adjustment is truly realized.

[0041] The one box is a brake-by-wire system, brake control is realized through electronic signal transmission, electronic assistance is used to replace traditional vacuum assistance, the problem of lack of stable vacuum source for new energy vehicles is solved, and the energy recovery function is provided to improve the cruising range.

[0042] Wherein, the automobile brake backup refers to an emergency brake system, and the purpose is to ensure braking as an alternative solution when the main brake system has a problem.

[0043] In this embodiment, when the operator steps on the pedal 11, the pedal 11 drives the main cylinder push rod 10 to move, the main cylinder push rod 10 drives the first piston 8 to move, and the first spring 12 and the second spring 13 are compressed at the same time. The first piston 8 pushes the oil in the first chamber out, along the first pipeline 14, the oil inlet path 4 into the groove of the oil path block 1. Since the outer peripheral wall of the simulator piston 3 is in close contact with the groove to form a sealed chamber, when the oil pressure increases, the oil pushes the simulator piston 3 to move downward, driving the simulator push rod 6 to compress the disc spring set 5, and the disc spring set 5 provides feedback force to simulate the real pedal feeling.

[0044] When the pedal 11 is released, the disc spring set 5 resets, driving the simulator piston 3 to rise, and the oil flows back.

[0045] In addition, the disc spring set 5 has at least two different disc springs stacked in sequence, and different combinations of the disc spring set 5 achieve different feedback forces to simulate the pedal feeling. When it is necessary to adjust the simulator disc spring or other data, the simulator housing 2 can be disassembled to adjust the interior, and the structure is simple.

[0046] In addition, the first spring 12 and the second spring 13 have the same spring force, and the second spring 13 is slightly longer than the first spring 12, which can be used for resetting and providing initial feedback force in the process of simulating the pedal feeling to simulate the real pedal feeling.

[0047] In addition, the oil tank 15 stores oil, and the first liquid supplement pipeline 16 and the second liquid supplement pipeline 17 continuously supplement the first chamber and the second chamber with oil.

[0048] Embodiment 2

[0049] As shown in Figure 1 Preferably, on the basis of embodiment 1, the oil path block 1 is further provided with an oil immersion path 18, one end of the oil immersion path 18 is in communication with the simulator housing 2, and the other end is in communication with the second liquid supplement pipeline 17 through the second pipeline 19.

[0050] Specifically, the groove is not in communication with the interior of the simulator housing 2, and the disc spring set 5 and the simulator push rod 6 are immersed in oil in the initial state. When the operator steps on the pedal 11, the oil pushes the simulator piston 3 to move downward, driving the simulator push rod 6 to compress the disc spring set 5 and squeeze out the oil, and the oil flows back to the oil tank 15 along the oil immersion path 18 and the second pipeline 19.

[0051] When the pedal 11 is released, the disc spring set 5 resets, driving the simulator piston 3 to rise, and the oil flows back to the simulator housing 2 again.

[0052] The beneficial effect of the preferred solution in the above embodiment is that the simulator housing 2 is connected with the oil can 15, so that the simulator is permanently immersed in the brake fluid, which is beneficial for the rust prevention and heat dissipation protection of the product, and reduces the wear and mechanical loss of the product brake.

[0053] Embodiment 3

[0054] As shown in the figure, preferably, on the basis of embodiments 1-2, the first liquid supplementing pipeline 16 is provided with a first control valve 20. Figure 1

[0055] Preferably, a bypass branch 21 is further included, both ends of the bypass branch 21 are in communication with the first liquid supplementing pipeline 16 and are located on both sides of the first control valve 20 respectively, and a one-way valve 22 is arranged on the bypass branch 21.

[0056] In this embodiment, the one-way valve 22 is arranged in the direction towards the first chamber, and when the first control valve 20 is disconnected, the oil can 15 can still continuously supplement the first chamber through the bypass branch 21;

[0057] When the first control valve 20 is connected, after the operator steps on the pedal 11, the oil can flow back to the oil can 15 through the first liquid supplementing pipeline 16.

[0058] In addition, a plurality of filters are arranged on the first liquid supplementing pipeline 16, and the filters are located on both sides of the first control valve 20.

[0059] Embodiment 4

[0060] As shown in the figure, preferably, on the basis of embodiments 1-3, the first pipeline 14 is provided with a second control valve 23. Figure 1 Specifically, the first pipeline 14 is used to deliver oil to the oil block 1, and the second control valve 23 controls the on-off of the first pipeline 14.

[0061] In addition, a plurality of filters are arranged on the first pipeline 14, and the filters are located on both sides of the second control valve 23.

[0062] Embodiment 5

[0063] As shown in the figure, preferably, on the basis of embodiments 1-4, a master cylinder pressure sensor 24 is arranged in the second chamber.

[0064] Figure 1 Preferably, a stroke sensor 25 is arranged on the master cylinder push rod 10.

[0065]

[0066] ​​​In this embodiment, an external pipeline is connected to the side wall of the second chamber, and a main cylinder pressure sensor 24 is installed on the external pipeline. When the first piston 8 and the second piston 9 reciprocate, and the volume of the first chamber and the second chamber changes, the internal pressure of the main cylinder 7 is monitored by the main cylinder pressure sensor 24, and the proportional relationship between the pedal depth and the pedal feedback force is tested by the stroke sensor 25. The two are mutually verified to improve the accuracy of the data.

[0067] Example 6

[0068] like Figure 1 As shown, preferably, based on embodiments 1-5, a wire retaining ring 26 is provided at the joint between the simulator housing 2 and the oil circuit block 1.

[0069] Preferably, an O-ring 27 is provided at the joint between the simulator housing 2 and the oil circuit block 1.

[0070] In this embodiment, the simulator housing 2 is inserted into the groove of the oil circuit block 1. A first annular groove is formed on the outer wall of the simulator housing 2, and a second annular groove is formed on the inner wall of the groove. The first annular groove and the second annular groove correspond to each other. The first annular groove and the second annular groove are fixedly connected by a steel wire clamp 26, which reduces the difficulty of product manufacturing, facilitates disassembly and assembly, and improves the product production cycle. The use of untreated steel wire reduces environmental pollution.

[0071] In addition, an O-ring 27 is used for sealing to prevent oil leakage.

[0072] Example 7

[0073] like Figure 1 As shown, preferably, based on embodiments 1-6, a sealing cup 28 is provided on the outer peripheral wall of the simulator piston 3.

[0074] In this embodiment, a seal is formed between the outer peripheral wall of the simulator piston 3 and the inner wall of the groove of the oil passage block 1, which helps the oil to store pressure and drive the simulator piston 3 to move.

[0075] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0076] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and do not connote or imply any relative importance or any meaning pertaining to the quantity of the features being described. Thus, a feature defined with "first", "second", etc. can include at least one of the features, explicitly or implicitly. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

[0077] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connecting", "connection", "fixing" and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless specifically defined otherwise. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0078] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0079] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or features of different embodiments or examples described in the present application without contradiction.

[0080] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A brake-by-wire pedal simulator system, characterized by, The utility model relates to a kind of hydraulic brake simulator, including: Oil path block (1), recess is opened in one side of the oil path block (1), simulator shell (2) is split and fixed at the recess, simulator piston (3) is slidably installed in the recess, oil inlet (4) that communicates recess is also opened in the oil path block (1), disc spring group (5) is provided in simulator shell (2), simulator push rod (6) is provided on the side of disc spring group (5) towards simulator piston (3), simulator push rod (6) passes through the top wall of simulator shell (2) and is fixedly connected with simulator piston (3); Master cylinder (7), first piston (8) and second piston (9) are sequentially slidably arranged in the master cylinder (7), it is first chamber between the first piston (8) and the second piston (9), it is second chamber between the second piston (9) and the bottom of the inside of the master cylinder (7), one end of master cylinder push rod (10) is fixedly connected on the first piston (8), the other end of master cylinder push rod (10) is out of the master cylinder (7) from the side of the master cylinder (7) away from second chamber and is fixedly connected with pedal (11), first spring (12) is provided between the first piston (8) and the second piston (9), second spring (13) is provided between the second piston (9) and the bottom of the inside of the master cylinder (7), the first chamber is communicated with the oil inlet (4) by first pipe line (14); Oil can (15), first liquid supplementing pipe line (16) and second liquid supplementing pipe line (17) are connected to the side wall of the oil can (15), the first liquid supplementing pipe line (16) is communicated with the first chamber, the second liquid supplementing pipe line (17) is communicated with the second chamber.

2. The brake-by-wire pedal simulator system according to claim 1, wherein Oil immersion path (18) is also opened on the oil path block (1), one end of the oil immersion path (18) is communicated in simulator shell (2), and the other end is communicated with the second liquid supplementing pipe line (17) by second pipe line (19).

3. The brake-by-wire pedal simulator system of claim 1, wherein, First control valve (20) is provided on the first liquid supplementing pipe line (16).

4. The brake-by-wire pedal simulator system according to claim 3, wherein It also includes bypass branch (21), both ends of the bypass branch (21) are communicated with the first liquid supplementing pipe line (16) and are located on the two sides of the first control valve (20) respectively, and one-way valve (22) is provided on the bypass branch (21).

5. The brake-by-wire pedal simulator system of claim 1, wherein, Second control valve (23) is provided on the first pipe line (14).

6. The brake-by-wire pedal simulator system of claim 1, wherein, Master cylinder pressure sensor (24) is provided in the second chamber.

7. The brake-by-wire pedal simulator system according to claim 6, wherein, Stroke sensor (25) is provided on the master cylinder push rod (10).

8. The brake-by-wire pedal simulator system of claim 1, wherein, Steel wire collar (26) is provided at the split of the simulator shell (2) and the oil path block (1).

9. The brake-by-wire pedal simulator system of claim 8, wherein, O-shaped sealing ring (27) is provided at the split of the simulator shell (2) and the oil path block (1).

10. The brake-by-wire pedal simulator system according to any one of claims 1 to 9, characterized in that Sealing leather bowl (28) is provided on the outer circumferential wall of the simulator piston (3).

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