Pedal Feel Simulator

Abstract

The present invention discloses a pedal feel simulator, which includes: a housing; a first elastic component and a second elastic component, both of which are installed in the housing; a pushing component, which is movably installed in the housing; a switch assembly, which is used to switch the position of the pushing component; wherein the pushing component is suitable for pushing the first elastic component to compress when the switch assembly fails, and the pushing component is suitable for pushing both the first elastic component and the second elastic component to compress when the switch assembly switches normally. The pedal feel simulator of the present invention can realize the pedal feel simulation of the braking system in a normal state, and when the switch assembly fails, the pushing component can also push the first elastic component to compress, thereby ensuring that the braking of the entire vehicle meets regulatory requirements and protects personnel safety, and has a simple structure and a small overall volume.

Description

Technical Field

[0001] The invention relates to the field of vehicles, and in particular to a pedal feel simulator. Background Art

[0002] In the related technology, the current pedal feel simulators are mainly divided into two categories: dry pedal feel simulators and wet pedal feel simulators. Among them, the dry pedal feel simulator solution is generally a simple multi-spring structure, which simulates the pedal feel by compressing the spring to generate feedback force. This simulator cannot meet the vehicle braking regulations in the brake system power-off mode, and there is a problem of pedal return, which affects the comfort and safety of driving operation. The wet pedal feel simulator has a complex structure, high cost, large size, and is difficult to arrange. There may be problems such as brake fluid leakage and contamination of the cockpit. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a pedal feel simulator that can solve the problem that the braking system cannot meet the regulatory requirements for vehicle braking in a power-off mode, has better safety and comfort, and has a small overall structural size and is easy to arrange.

[0004] According to an embodiment of the present invention, the pedal feel simulator includes: a shell; a first elastic component and a second elastic component, both of which are installed in the shell; a pushing component, which is movably installed on the shell; and a switch assembly, which is used to switch the position of the pushing component; wherein the pushing component is suitable for pushing the first elastic component to be compressed when the switch assembly fails, and the pushing component is suitable for pushing both the first elastic component and the second elastic component to be compressed when the switch assembly switches normally.

[0005] According to the pedal feel simulator of the present invention, the pedal feel of the braking system under normal conditions can be simulated, and when the switch assembly fails, the pushing component can also push the first elastic component to compress, thereby ensuring that the braking of the entire vehicle meets regulatory requirements and ensures personnel safety. The pedal feel simulator has a simple structure, low installation requirements, a small size and no risk of brake fluid leakage, is energy-saving and environmentally friendly, provides safety redundancy for the system, and ensures driving safety.

[0006] According to some embodiments of the pedal feel simulator of the present invention, the pushing component includes a driving structure and a support plate, the support plate is movably mounted on the housing, and the switch assembly is used to drive the driving structure to rotate from a first position to a second position; wherein the driving structure is suitable for pushing the first elastic component to compress when in the first position, and pushing the first elastic component to compress and driving the support plate to push the second elastic component to compress when in the second position.

[0007] According to some embodiments of the pedal feel simulator of the present invention, the support plate is provided with a through hole, and the inner peripheral wall of the through hole is provided with a radially protruding pressing portion; when in the first position, the driving structure passes through the through hole, and when in the second position, at least a portion of the driving structure is against the pressing portion along the axial direction of the outer shell.

[0008] According to some embodiments of the pedal feel simulator of the present invention, the driving structure includes a ball head rod and a driving spline, the ball head rod is connected to the driving spline and is fixed along the circumferential direction, the driving spline is provided with a pushing portion for abutting against the pressing portion, and the switch assembly is used to push the driving spline to rotate.

[0009] According to some embodiments of the pedal feel simulator of the present invention, there are multiple pressing parts and multiple pushing parts, and the multiple pushing parts correspond to the multiple pressing parts one by one.

[0010] According to some embodiments of the pedal feel simulator of the present invention, the inner circumferential wall of the shell has an inclined section, the radial dimension of the inclined section is constructed to gradually decrease from one end close to the drive structure to an end away from the drive structure, and the support plate is in contact with the inner circumferential wall of the inclined section.

[0011] According to some embodiments of the present invention, the pedal feel simulator further includes: a detection element, wherein the detection element and the switch assembly are both electrically connected to a control unit, and the detection element is used to detect the position of the pushing component; the switch assembly is configured to switch the position of the pushing component when the detection element detects that the pushing component moves to a set position.

[0012] According to some embodiments of the pedal feel simulator of the present invention, the switch assembly includes: an electromagnetic switch center axis; an electromagnetic switch gear, which is rotatably mounted on the electromagnetic switch center axis; an electromagnet, which is electrically connected to the control unit, and is used to control the electromagnetic switch gear to rotate relative to the electromagnetic switch center axis to drive the pushing component.

[0013] According to some embodiments of the pedal feel simulator of the present invention, the second elastic component includes a main spring and a rubber spring, the rubber spring is sleeved outside the main spring, and both the main spring and the rubber spring are suitable for resisting the pushing component.

[0014] According to some embodiments of the pedal feel simulator of the present invention, the first elastic component includes: a sleeve, which is installed on the housing; a push rod, which passes through the sleeve and slides with the sleeve, and the first end of the push rod is suitable for resisting against the pushing component; and a secondary spring, which is sleeved outside the push rod and elastically pressed between the first end of the push rod and the sleeve.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a schematic structural diagram of a pedal feel simulator according to an embodiment of the present invention;

[0018] Figure 2 is a cross-sectional view of a pedal feel simulator according to an embodiment of the present invention;

[0019] Figure 3 is a schematic structural diagram of a support plate of a pedal feel simulator according to an embodiment of the present invention;

[0020] Figure 4 is a cross-sectional view of a housing of a pedal feel simulator according to an embodiment of the present invention;

[0021] Figure 5 is a connection diagram of a switch assembly and a pushing assembly of a pedal feel simulator according to an embodiment of the present invention (failed state);

[0022] Figure 6 is a schematic diagram of the connection between the switch assembly and the push assembly of the pedal feel simulator according to an embodiment of the present invention (failure state - another perspective);

[0023] Figure 7 is a connection diagram of a switch assembly and a pushing component of a pedal feel simulator according to an embodiment of the present invention (when the switch assembly can be switched normally);

[0024] Figure 8 is a schematic diagram of the connection between the switch assembly and the push assembly of the pedal feel simulator according to an embodiment of the present invention (when the switch assembly can be switched normally - another perspective);

[0025] Fig. 9 is a schematic structural diagram of a driving spline of a pedal feel simulator according to an embodiment of the present invention;

[0026] Fig.10is a structural schematic diagram of a switch assembly of a pedal feel simulator according to an embodiment of the present invention;

[0027] Fig.11 is a schematic diagram of braking in a normal operating state of a pedal feel simulator according to an embodiment of the present invention;

[0028] Fig.12 Schematic diagram of braking in a failed state of a pedal feel simulator according to an embodiment of the present invention.

[0029] Reference numerals:

[0030] Pedal Feel Simulator 100,

[0031] Shell 1, parallel section 11, inclined section 12,

[0032] The first elastic component 2, the sliding sleeve 21, the push rod 22, the auxiliary spring 23, the stop plate 24,

[0033] The second elastic component 3, the main spring 31, the rubber spring 32,

[0034] Pushing assembly 4, driving structure 41, ball head rod 411, rod body 412, seat body 413, driving spline 414, pushing portion 415, pushing surface 416, support plate 42, pressing portion 421, pressing groove 422, avoidance recess 423, sliding member 424, through hole 425, return spring 43,

[0035] The switch assembly 5 , the electromagnet 51 , the mounting hole 511 , the electromagnetic switch central axis 52 , the electromagnetic switch rotating gear 53 , the driving gear 531 , the driving slot 532 , and the switch wiring harness 54 . DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] Reference below Figure 1-Figure 12 A pedal feel simulator 100 according to an embodiment of the present invention is described. The pedal feel simulator 100 can simulate the pedal feel of the braking system under normal operating conditions, and when the electronic brake booster motor fails to work normally, the pedal force basically acts on the master cylinder, ensuring that the braking of the entire vehicle meets regulatory requirements and protects personnel safety.

[0038] like Figure 1-Figure 12 As shown, the pedal feel simulator 100 according to the embodiment of the present invention includes: a housing 1 , a first elastic component 2 , a second elastic component 3 , a pushing component 4 and a switch assembly 5 .

[0039] The housing 1 has a hollow active cavity, one end of which is open. Figure 2 , Fig.11 and Fig.12 As shown, the left end of the active cavity of the housing 1 is open. The first elastic component 2 and the second elastic component 3 are both installed in the housing 1. It should be noted that the first elastic component 2 and the second elastic component 3 both include elastic structures, so that when the first elastic component 2 and the second elastic component 3 are pushed, they can be elastically deformed, thereby forming feedback of the braking force and realizing the simulation of the pedal feel.

[0040] The pushing component 4 is movably mounted on the housing 1, wherein the pushing component 4 is an active component, and is used to push the first elastic component 2 and the second elastic component 3 to elastically deform. When the operator simulates the pedal feel, the braking force can be applied to the pushing component 4, so that the pushing component 4 acts on the first elastic component 2 and the second elastic component 3.

[0041] The switch assembly 5 is used to switch the position of the pushing component 4. It should be noted that the switch assembly 5 in the present invention is an electric control structure, that is, the switch harness 54 can be controlled by the control unit to energize the switch assembly 5, so that the switch assembly 5 applies a driving force to the pushing component 4 after being energized, thereby switching the pushing component 4 from the current position to the target position.

[0042] The push component 4 is suitable for pushing the first elastic component 2 to compress when the switch assembly 5 fails, and is suitable for pushing both the first elastic component 2 and the second elastic component 3 to compress when the switch assembly 5 normally switches the position of the push component 4. That is, when the switch assembly 5 does not realize the switching control of the push component 4, the push component 4 only acts on the first elastic component 2, and after the switch assembly 5 switches the push component 4, the push component 4 acts on both the first elastic component 2 and the second elastic component 3.

[0043] Therefore, through the pedal feel simulator 100 provided in the present invention, when the braking system is in a normal state, when the vehicle is braked, the driver steps on the brake pedal, so that the push component 4 moves forward. At this time, the electric part of the switch assembly 5 and the module that controls the electric part are in a normal state, so that the switch assembly 5 drives the push component 4 to switch from the current position to the target position, and the push component 4 can compress the first elastic component 2 and the second elastic component 3 at the same time to achieve the simulation of the brake pedal feel. When the braking system is in a fault state, the electric part of the switch assembly 5 or the module that controls the electric part cannot work normally, the switch assembly 5 fails, and the position of the push component 4 remains unchanged. At this time, the push component 4 only pushes the first elastic component 2 to achieve compression, and the force of the push component 4 is greatly reduced. The pedal force basically acts on the master cylinder, ensuring that the vehicle braking meets the regulatory requirements and the safety of personnel is guaranteed.

[0044] According to the pedal feel simulator 100 of the present invention, the pedal feel of the braking system under normal conditions can be simulated, and when the switch assembly 5 fails, the pushing component 4 can also push the first elastic component 2 to compress, thereby ensuring that the braking of the entire vehicle meets regulatory requirements and ensures personnel safety. The pedal feel simulator 100 has a simple structure, low installation requirements, a small size and no risk of brake fluid leakage, is energy-saving and environmentally friendly, provides safety redundancy for the system, and ensures driving safety.

[0045] In some embodiments, the driving assembly 4 includes a driving structure 41 and a support plate 42. The support plate 42 can be movably mounted on the housing 1. For example, the support plate 42 can move along the axial direction of the housing 1 in the housing 1. The driving structure 41 is also mounted on the housing 1. Figure 2 As shown, the support plate 42 is located at the left end of the housing 1. Fig.11 As shown, the support plate 42 is located in the middle of the housing 1. Fig.12 As shown, when the driving structure 41 moves, the support plate 42 remains in the same Figure 2 Same location.

[0046] Among them, the switch assembly 5 is used to drive the driving structure 41 to rotate from the first position to the second position, that is, the power output end of the switch assembly 5 is in contact with the driving structure 41, so as to adjust the position state of the driving structure 41. When the driving structure 41 is not driven by the switch assembly 5, the driving structure 41 is located at the first position, and when the driving structure 41 is driven by the switch assembly 5, the driving structure 41 moves to the second position under the driving action of the switch assembly 5. It should be noted that when the driving structure 41 is located at the first position, it corresponds to the position when the switch assembly 5 fails; when the driving structure 41 is located at the second position, it corresponds to the normal switching of the switch assembly 5. That is to say, in the present invention, when the switch assembly 5 works normally, the switch assembly 5 can effectively drive the driving structure 41 so that the driving structure 41 rotates from the first position to the second position, and when the switch assembly 5 fails, the switch assembly 5 cannot effectively push the driving structure 41, that is, the driving structure 41 remains in the first position.

[0047] like Figure 2 As shown in FIG. 1 , at this time, the driving structure 41 is located at the first position. After the switch assembly 5 drives the driving structure 41, as shown in FIG. Fig.11 As shown, the driving structure 41 drives the support plate 42, so that the driving structure 41 can drive the first elastic component 2 to compress, and at the same time drive the support plate 42 to push the second elastic component 3 to compress, thereby simulating the pedal feel; when the switch assembly 5 does not effectively drive the driving structure 41, as shown in FIG. Fig.12As shown, the driving structure 41 pushes the first elastic component 2 to compress when in the first position, and the second elastic component 3 is in the original extended state, ensuring that the braking of the entire vehicle meets regulatory requirements and protects personnel safety.

[0048] In some embodiments, the support plate 42 is provided with a through hole 425 , which penetrates along the thickness direction of the support plate 42 , that is, the through hole 425 penetrates the support plate 42 along the axial direction of the shell 1 , so that the driving structure 41 can cooperate with the support plate 42 at the through hole 425 .

[0049] The inner wall of the through hole 425 is provided with a pressing portion 421, which is configured to protrude radially from the inner wall of the through hole 425. In the first position, the driving structure 41 passes through the through hole 425, and in the second position, at least a portion of the driving structure 41 abuts against the pressing portion 421 along the axial direction of the housing 1.

[0050] That is to say, when the switch assembly 5 of the braking system fails, the driving structure 41 passes through the through hole 425 of the support plate 42, that is, there is no pressing force between the driving structure 41 and the support plate 42, and during the movement of the driving structure 41, the support plate 42 is located in the original position, and the driving structure 41 passes through the support plate 42 to press the first elastic component 2 to output braking force; when the switch assembly 5 of the braking system drives the driving structure 41 from the first position to the second position, the driving structure 41 effectively presses the support plate 42 to drive the support plate 42 to move together in the housing 1, press the first elastic component 2, and the support plate 42 presses the second elastic component 3, thereby realizing pedal feel simulation.

[0051] In some embodiments, the drive structure 41 includes a ball head rod 411 and a drive spline 414, and as shown in FIG. Figure 2 , Fig.11 and Fig.12 As shown, the ball head rod 411 includes a rod body 412 and a seat body 413. The rod body 412 and the seat body 413 are connected and cooperated by a ball joint structure. The rod body 412 is the force-bearing end of the braking force, so that the rod body 412 drives the seat body 413 to move. The seat body 413 is connected to the driving spline 414 and is fixed along the circumferential direction, so that the ball head rod 411 can rotate together with the driving spline 414.

[0052] The driving spline 414 is provided with a pushing portion 415, and the pushing portion 415 is used to abut against the pressing portion 421. Figure 3 As shown, the pressing portion 421 is configured as a boss structure, and a pressing groove 422 is provided on the surface of the pressing portion 421. Fig. 9 As shown, the pushing portion 415 is configured as a boss structure protruding from the outer peripheral wall of the driving spline 414 , and a pushing surface 416 is formed on the surface of the pushing portion 415 .

[0053] The switch assembly 5 is used to push the driving spline 414 to rotate. Specifically, when the switch assembly 5 does not push the driving spline 414, Figure 5 and Figure 6 As shown, the pushing portion 415 and the pressing portion 421 are staggered in the axial direction of the housing 1, that is, the pushing portion 415 passes through the through hole 425, and the pushing structure has no pushing effect on the support plate 42; when the switch assembly 5 is working, the driving spline 414 is pushed, such as Figure 7 and Figure 8 As shown, the pushing portion 415 and the pressing portion 421 are opposite to each other in the axial direction of the shell 1, that is, at least a portion of the pushing portion 415 extends into the pressing groove 422, and the pushing surface 416 abuts against the inner wall of the pressing groove 422, so that the pushing portion 415 can press and push the pressing portion 421, and then the pushing structure pushes the support plate 42 to realize the simulation of the pedal feel.

[0054] In some embodiments, the pressing portion 421 and the pushing portion 415 are both multiple, such as Figure 3 As shown, the plurality of pressing portions 421 are sequentially distributed in the circumferential direction of the inner peripheral wall of the through hole 425, and as shown in FIG. Fig. 9 As shown, the plurality of pushing portions 415 are sequentially distributed in the circumferential direction of the driving spline 414 , so that the plurality of pushing portions 415 correspond one-to-one with the plurality of pressing portions 421 , respectively, thereby enabling the driving spline 414 to drive the support plate 42 at multiple positions simultaneously.

[0055] It should be noted that if Figure 3 As shown, a plurality of pressing portions 421 are distributed in the circumferential direction of the through hole 425, and an avoidance recess 423 is formed between two adjacent pressing portions 421, and the avoidance recess 423 can avoid the pushing portion 415. That is, in the first position, the pushing portion 415 passes through the through hole 425 at the avoidance recess 423, that is, after the pushing portion 415 passes through the support plate 42, the driving structure 41 only presses the first elastic component 2, and in the second position, the pushing portion 415 presses against the pressing portion 421, so that the driving structure 41 not only presses the second elastic component 3 through the support plate 42, but also presses the first elastic component 2.

[0056] In some embodiments, the inner peripheral wall of the housing 1 has an inclined section 12, such as Figure 4 As shown, the inner circumferential wall of the housing 1 includes an inclined section 12 and a parallel section 11 which are sequentially distributed along the axial direction. The parallel section 11 is parallel to the axis of the housing 1. The inclined section 12 forms a certain angle with the axis of the housing 1. The support plate 42 fits the inner circumferential wall of the inclined section 12. Figure 2 As shown, a sliding member 424 is provided on the outer peripheral wall of the support plate 42, and the sliding member 424 is slidably matched with the inner peripheral wall of the inclined section 12. The angle between the parallel section 11 and the inclined section 12 is θ.

[0057] The radial dimension of the inclined section 12 is configured to gradually decrease from one end close to the driving structure 41 to one end far away from the driving structure 41. Figure 4 As shown, the radial dimension of the inclined section 12 is constructed to gradually decrease from one end close to the parallel section 11 to the end away from the parallel section 11. It can be understood that the support plate 42 can move from the position in contact with the parallel section 11 to the position in contact with the inclined section 12 during the axial movement in the housing 1, so that during the movement of the support plate 42 along the inclined section 12, the squeezing force of the inner circumferential wall of the inclined section 12 on the sliding member 424 gradually increases, and the friction force on the sliding member 424 continues to increase. In this way, when contact braking is performed, the brake pedal returns to its position, so that the support plate 42 can be retreated under the action of the second elastic component 3 and the inclined section 12. In this way, the return hysteresis force of the push component 4 can be increased to avoid the problem of the pedal returning to the tight foot.

[0058] In some embodiments, the pedal feel simulator 100 further includes: a detection element, and the detection element and the switch assembly 5 are both electrically connected to the control unit, so that the detection element can send the detected signal to the control unit, and the control unit can also control the switch assembly 5.

[0059] The detection element is used to detect the position of the push assembly 4. If the detection element is a displacement sensor, the detection element can determine the position of the push assembly 4 by detecting the displacement of the push assembly 4. Specifically, the detection element can detect the displacement of the ball head rod 411, so that the detection element can accurately detect the position of the ball head rod 411 when the ball head rod 411 moves. The switch assembly 5 is configured to drive the push assembly 4 to switch from the current position to the target position when the detection element detects that the push assembly 4 moves to the set position.

[0060] That is to say, when the detection element detects that the ball head rod 411 moves to the set position, it sends the position information of the ball head rod 411 to the control unit. The control unit makes corresponding judgment and analysis based on the position information, and outputs a control instruction to the switch assembly 5. After receiving the control instruction, the switch assembly 5 pushes the driving spline 414 of the pushing component 4, thereby switching the pushing component 4 from the current position to the target position.

[0061] In some embodiments, Figure 2 , Fig.11 and Fig.12 As shown, the switch assembly 5 includes: an electromagnetic switch central shaft 52 , an electromagnetic switch rotating tooth 53 and an electromagnet 51 .

[0062] The electromagnetic switch center shaft 52 is fixedly connected to the electromagnet 51, and the electromagnetic switch center shaft 52 can be used as the output shaft of the electromagnet 51. The electromagnetic switch gear 53 is installed on the electromagnetic switch center shaft 52, so that when the electromagnet 51 outputs power, the electromagnetic switch center shaft 52 drives the electromagnetic switch gear 53 to rotate, and the electromagnetic switch gear 53 abuts against the driving spline 414 when rotating, thereby driving the driving spline 414 to rotate. Fig.10 As shown, the electromagnet 51 is provided with two mounting holes 511 for being detachably connected to the housing 1 , and the electromagnetic switch rotating tooth 53 is provided with a driving tooth 531 , and a driving groove 532 is formed at the driving tooth 531 , and the driving groove 532 is used to cooperate with the pushing portion 415 .

[0063] The electromagnet 51 is electrically connected to the control unit, such as Figure 1 and Figure 2 As shown, a switch harness 54 is provided on the peripheral wall of the housing 1, one end of the switch harness 54 is connected to the electromagnet 51, and the other end is suitable for extending outside the housing 1 for electrical connection with the control unit, so that the control unit can output the control instruction to the electromagnet 51 through the switch harness 54, so that the electromagnet 51 controls the electromagnetic switch gear 53 to push the pushing component 4, thereby realizing the switching of the pushing component 4 between two states.

[0064] It should be noted that, in the present invention, the switch assembly 5 is set to automatically switch the push component 4, and the failure of the switch assembly 5 can ensure the failure of the control unit, the failure between the control unit and the switch harness 54, the failure between the switch harness 54 and the electromagnet 51, and the response problem of the electromagnet 51 itself. That is, when the switch assembly 5 encounters the above problems, the push component 4 can push the first elastic component 2 to compress, thereby outputting part of the braking force, ensuring that the braking of the whole vehicle meets the regulatory requirements and ensuring the safety of personnel.

[0065] In some embodiments, Figure 2 , Fig.11 and Fig.12 As shown, the second elastic component 3 includes a main spring 31 and a rubber spring 32 .

[0066] Specifically, the rubber spring 32 and the main spring 31 are both configured as annular springs, and the rubber spring 32 is sleeved outside the main spring 31, and the main spring 31 and the rubber spring 32 are both suitable for resisting against the pushing assembly 4. Figure 2 , Fig.11 and Fig.12 As shown, the rubber spring 32 and the main spring 31 are both located in the right end area of ​​the housing 1, the support plate 42 is located in the left end area of ​​the housing 1, and the radial dimension of the support plate 42 is not less than the inner diameter of the rubber spring 32, and the natural extension length of the main spring 31 is greater than the natural extension length of the rubber spring 32.

[0067] In this way, when the driving structure 41 drives the support plate 42 to move toward the right end area in the shell 1, the support plate 42 gradually approaches the rubber spring 32 and the main spring 31, and first contacts the main spring 31, and then contacts the rubber spring 32, thereby achieving pressure on the rubber spring 32 and the main spring 31 to achieve pedal feel simulation.

[0068] In some embodiments, the first elastic component 2 includes: a sliding sleeve 21 , a push rod 22 and a secondary spring 23 .

[0069] Among them, Figure 2 , Fig.11 and Fig.12 As shown, a mounting hole 511 is provided on the right end face of the housing 1, and the sliding sleeve 21 is installed at the mounting hole 511 of the housing 1. The push rod 22 passes through the sliding sleeve 21 so as to be retractable at the mounting hole 511, that is, the push rod 22 is slidably matched with the sliding sleeve 21, thereby realizing the extension and retraction of the push rod 22 from the housing 1.

[0070] The first end of the push rod 22 is adapted to abut against the push assembly 4. Fig.11 and Fig.12 As shown, the left end of the push rod 22 abuts against the seat 413 of the ball rod 411, so that the pushing assembly 4 can push the push rod 22 to slide relative to the housing 1. The auxiliary spring 23 is sleeved outside the push rod 22, and the auxiliary spring 23 elastically presses between the first end of the push rod 22 and the sliding sleeve 21, so that when the push rod 22 slides relative to the housing 1, the auxiliary spring 23 can be compressed and extended. Among them, the left end of the push rod 22 is also provided with a stop plate 24, which is suitable for pressing against the support plate 42 to prevent the push rod 22 and the auxiliary spring 23 from automatically falling out of the housing 1.

[0071] In the specific design, the auxiliary spring 23 is constructed in an annular shape, and the radial dimension of the auxiliary spring 23 is smaller than the radial dimension of the main spring 31. The main spring 31 is sleeved outside the auxiliary spring 23, that is, the main spring 31 is a large spring, and the auxiliary spring 23 is a small spring. Figure 2 As shown, the right end of the main spring 31 is sleeved outside the portion of the sliding sleeve 21 located inside the housing 1 to provide a limiting support for the main spring 31 .

[0072] The following is combined with Figure 2 , Fig.11 and Fig.12 The operation process of the pedal feel simulator 100 of some specific embodiments of the present application is described as follows:

[0073] First, in the normal state of the braking system: during service braking, the driver steps on the brake pedal to push the ball head rod 411 forward (center 2 to the right), at this time the detection element feeds back the braking signal to the control unit, the control unit issues an instruction, and energizes the electromagnet 51 by connecting the power supply of the switch harness 54, the electromagnet 51 drives the electromagnetic switch center shaft 52 to rotate, the electromagnetic switch center shaft 52 drives the electromagnetic switch gear 53 to rotate, the electromagnetic switch gear 53 engages with the drive spline 414, thereby driving the drive spline 414 to rotate; the ball head rod 411 continues to move forward, driving the spline 414 to move into the pressing groove 422 of the pressing portion 421 of the support plate 42, pushing the support plate 42 to move forward, compressing the secondary spring 23, the main spring 31, and the rubber spring 32 in turn, thereby simulating the feeling of the brake pedal.

[0074] In addition, the parallel section 11 and the inclined section 12 of the inner side wall of the housing 1 form a certain angle. When the support plate 42 moves forward and passes through the parallel section 11, the outer diameter of the sliding member 424 and the friction force it receives remain unchanged; when passing through the inclined section 12, the outer diameter of the sliding member 424 continues to shrink and the friction force it receives continues to increase. When the brake is released, the brake pedal returns to its original position. Due to the bevel design of the spring rubber and the inclined section 12 of the housing 1, the return hysteresis of the push rod 22 is increased, thereby avoiding the problem of the pedal returning to its original position and following the foot tightly.

[0075] In the fault state of the brake system: when the switch assembly 5 cannot work normally due to the fault of the detection element before braking, the control unit and the electromagnet 51 losing power, the driver steps on the brake pedal and pushes the ball head rod 411 forward. At this time, the switch assembly 5 does not move, and the driving spline 414 remains in the original state due to the action of the return spring 43, and moves forward directly through the avoidance recess 423 of the support plate 42, and then compresses the push rod 22 and the secondary spring 23 to complete the braking. Because the main spring 31 and the rubber spring 32 do not participate in the work during braking, the spring force of the push rod 22 is greatly reduced. At this time, the pedal force basically acts on the master cylinder, ensuring that the braking of the whole vehicle meets the regulatory requirements and guarantees the safety of personnel.

[0076] Among them, when the switch assembly 5 loses power and the electromagnet 51 cannot work normally during braking: the pedal returns to its original position, and the electromagnetic switch gear 53 returns to its original state because there is no current in the electromagnetic switch. The driving tooth 531 at its bottom contacts the pushing part 415 of the driving spline 414 to reduce the friction force and ensure that the driving spline 414 is smoothly restored to its original state under the action of the return spring piece 43. When braking again, the driving spline 414 directly moves forward through the avoidance recess 423 of the support plate 42, and then continues to compress the auxiliary spring 23 to complete the braking.

[0077] Therefore, the pedal feel simulator 100 of the present invention has the following technical advantages: when the brake system is working normally, the brake pedal feel is simulated by compressing the spring assembly and the shell resistance; when the pedal feel returns, the rubber spring 32 and the segmented structure of the shell can increase the return hysteresis force of the push rod 22, thereby solving the problem of the pedal return following the foot. When the brake system fails and the electronic brake booster motor cannot work normally, the main spring 31, rubber spring 32 and other components in the pedal feel simulator 100 do not participate in the work, which can greatly reduce the force of the auxiliary spring 23, ensuring that the braking of the whole vehicle meets the regulatory requirements and ensuring the safety of personnel. Moreover, the pedal feel simulator 100 is simpler in structure, lower in cost, smaller in size, and has no risk of brake fluid leakage than the hydraulic simulator. It is energy-saving and environmentally friendly, provides safety redundancy for the system, and ensures driving safety.

[0078] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0079] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0080] In the description of the present invention, "plurality" means two or more.

[0081] In the description of the present invention, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0082] In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", 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 invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0084] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A pedal feel simulator (100), characterized in that: include: Housing (1); A first elastic component (2) and a second elastic component (3), wherein the first elastic component (2) and the second elastic component (3) are both installed in the housing (1); A pushing component (4), wherein the pushing component (4) is movably mounted on the housing (1); A switch assembly (5), wherein the switch assembly (5) is used to switch the position of the pushing assembly (4); in When the switch assembly (5) fails, the pushing component (4) is suitable for pushing the first elastic component (2) to be compressed, and when the switch assembly (5) is switched normally, the pushing component (4) is suitable for pushing both the first elastic component (2) and the second elastic component (3) to be compressed; the pushing component (4) comprises a driving structure (41) and a support plate (42), the support plate (42) being movably mounted on the housing (1), and the switch assembly (5) is used for driving the driving structure (41) to rotate from a first position to a second position; in The driving structure (41) is suitable for pushing the first elastic component (2) to be compressed when in the first position, and for pushing the first elastic component (2) to be compressed and driving the support plate (42) to push the second elastic component (3) to be compressed when in the second position; the support plate (42) is provided with a through hole (425), and the inner peripheral wall of the through hole (425) is provided with a radially protruding pressing portion (421); When in the first position, the driving structure (41) passes through the through hole (425), and when in the second position, at least a portion of the driving structure (41) abuts against the pressing portion (421) along the axial direction of the housing (1); The inner circumferential wall of the housing (1) has an inclined section (12), the radial dimension of the inclined section (12) being configured to gradually decrease from an end close to the drive structure (41) to an end away from the drive structure (41), and the support plate (42) is in contact with the inner circumferential wall of the inclined section (12).

2. The pedal feel simulator (100) according to claim 1, characterized in that: The driving structure (41) comprises a ball head rod (411) and a driving spline (414); the ball head rod (411) is connected to the driving spline (414) and is fixed in the circumferential direction; the driving spline (414) is provided with a pushing portion (415) for abutting against the pressing portion (421); and the switch assembly (5) is used to push the driving spline (414) to rotate.

3. The pedal feel simulator (100) according to claim 2, characterized in that: There are multiple pressing parts (421) and multiple pushing parts (415), and the multiple pushing parts (415) correspond one-to-one to the multiple pressing parts (421).

4. The pedal feel simulator (100) according to any one of claims 1 to 3, characterized in that: Also includes: a detection element, wherein the detection element and the switch assembly (5) are both electrically connected to a control unit, and the detection element is used to detect the position of the pushing component (4); The switch assembly (5) is configured to switch the position of the pushing component (4) when the detection element detects that the pushing component (4) moves to a set position.

5. The pedal feel simulator (100) according to claim 4, characterized in that: The switch assembly (5) comprises: Electromagnetic switch center axis (52); An electromagnetic switch rotating tooth (53), wherein the electromagnetic switch rotating tooth (53) is rotatably mounted on the electromagnetic switch central axis (52); An electromagnet (51), the electromagnet (51) being electrically connected to the control unit, and the electromagnet (51) being used to control the electromagnetic switch rotating tooth (53) to rotate relative to the electromagnetic switch central axis (52) to drive the pushing component (4).

6. The pedal feel simulator (100) according to any one of claims 1 to 3, characterized in that: The second elastic component (3) comprises a main spring (31) and a rubber spring (32), wherein the rubber spring (32) is sleeved outside the main spring (31), and both the main spring (31) and the rubber spring (32) are suitable for abutting against the pushing component (4).

7. The pedal feel simulator (100) according to any one of claims 1 to 3, characterized in that: The first elastic component (2) comprises: A sliding sleeve (21), wherein the sliding sleeve (21) is mounted on the housing (1); A push rod (22), the push rod (22) passes through the sliding sleeve (21) and is slidably matched with the sliding sleeve (21), and the first end of the push rod (22) is suitable for abutting against the pushing component (4); A secondary spring (23), wherein the secondary spring (23) is sleeved outside the push rod (22), and the secondary spring (23) elastically presses between the first end of the push rod (22) and the sliding sleeve (21).

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