Dry type electronic pedal simulator with hysteresis characteristic
By designing a conical chamber and a damping ring in a dry electronic pedal simulator, and utilizing segmented elastic elements and damping ring friction, the problem of existing simulators being unable to simulate hysteresis was solved, achieving realistic simulation of hysteresis and improved durability.
Patent Information
- Application Number
- CN202423167728.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-19
AI Technical Summary
Existing dry electronic pedal simulators cannot effectively simulate the lag of traditional vacuum boosters, requiring drivers to undergo additional learning.
Design a dry electronic pedal simulator with hysteresis characteristics. By setting a conical chamber and a damping ring inside the housing, segmented elastic force simulation is provided by segmented compression of the first and second elastic elements, and the hysteresis sensation is simulated by combining the friction between the damping ring and the inner wall of the chamber.
It achieves effective simulation of lag, allowing drivers to feel the lag increase with displacement when pressing the pedal, thus reducing the learning cost and improving the durability of the simulator.
Smart Images
Figure CN223590704U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of automobile brake, concretely to a dry type electronic pedal simulator with hysteresis characteristic. BACKGROUND
[0002] In the field of new energy automobile brake, including EHB (electronic hydraulic brake) and EMB (electronic mechanical brake). Among them, electronic hydraulic brake has no mechanical connection between brake pedal and brake system, cannot produce similar pedal touch feeling feedback to driver as hydraulic brake system, thus needs to increase pedal unit that can simulate nonlinear feedback force.
[0003] Its problem lies in, the pedal of traditional vacuum booster has hysteresis, and hysteresis increases with the increase of displacement, and the hysteresis of existing dry type electronic pedal feeling simulator is basically same in whole working stroke, cannot simulate pedal feeling that driver has been accustomed to, increases additional learning cost. UTILITY MODEL CONTENTS
[0004] The utility model solves the technical problem that a dry type electronic pedal simulator that can fully simulate hysteresis is provided.
[0005] The utility model solves the technical problem that a dry type electronic pedal simulator that can fully simulate hysteresis is provided.
[0006] The outer side of the cover plate is provided with a ball head push rod, one end of the ball head push rod passes through the cover plate and is connected with the first support frame, and the outer periphery of the first support frame is provided with a damping ring in contact with the inner periphery of the chamber.
[0007] The utility model has the advantages that when the ball head push rod is pushed, the first elastic element and the second elastic element are gradually compressed, segmented elastic force simulation pedal feeling is provided, the damping ring and the tapered inner wall of the chamber are rubbed to provide hysteresis, the ball head push rod is pushed in deeper, and the damping ring and the inner wall of the chamber are rubbed more, the feeling that the hysteresis of the pedal of traditional vacuum booster increases with the increase of displacement is simulated.
[0008] On the basis of the above technical scheme, the utility model can also be improved as follows.
[0009] Further, the displacement sensor assembly is provided with a receiver fixed to the outer wall of the shell, and a magnet fixed to the first support frame.
[0010] The beneficial effect of the further scheme is that the traditional special-shaped magnet support frame is cancelled, the cost is reduced, and the positioning accuracy of the displacement sensor is improved.
[0011] Further, the installation slot is filled with cured glue.
[0012] The beneficial effect of the further scheme is that the magnet is more stably fixed to the first support frame.
[0013] Further, a ring groove is formed in the inner bottom surface of the chamber, and a transition rubber is arranged in the ring groove, and the top end of the transition rubber extends out of the ring groove.
[0014] The beneficial effect of the further scheme is that the transition rubber ensures that the first elastic element intervenes more smoothly after the second elastic element is compressed, and there is no obvious step feeling.
[0015] Further, a first counterbore is formed in the inner bottom surface of the chamber, a third elastic element is arranged in the first counterbore, a push rod is fixed to the first support frame, one end of the push rod towards the cover plate is connected with the ball head push rod, the other end of the push rod sequentially passes through the first support frame and the second support frame and points to the third elastic element, and the distance between the push rod and the third elastic element is greater than the sliding stroke of the second support frame and less than the sliding stroke of the first support frame.
[0016] The beneficial effect of the further scheme is that the third elastic element provides a third elastic force for the compression end of the first elastic element, simulating the feeling of the top foot after the pedal is lowered to the bottom.
[0017] Further, an adapter is fixed to the end of the ball head push rod away from the first support frame, a push rod spring is sleeved on the outer periphery of the ball head push rod, one end of the push rod spring abuts against the end face of the cover plate, and the other end of the push rod spring abuts against the end face of the adapter.
[0018] The beneficial effect of the further scheme is that the push rod spring is used to provide the initial force of the pedal.
[0019] Further, a dust cover is sleeved on the outer periphery of the push rod spring, one end of the dust cover is fixedly connected with the adapter, and the other end of the dust cover is fixedly connected with the cover plate.
[0020] The beneficial effect of the further scheme is that the dust cover protects the ball head push rod and the cover plate, and prevents dust from entering the chamber.
[0021] Further, the adapter is fixedly connected with a pedal connecting rod away from one end of the ball push rod.
[0022] The beneficial effect of the above further scheme is that the pedal connecting rod can be better connected with the pedal.
[0023] Further, the taper angle of the inner wall of the chamber is 0.6°.
[0024] The beneficial effect of the above further scheme is that the interference of the damping ring is gradually increased by the taper angle of the inner wall of the chamber, and the friction of the damping ring is increased, and the structure is simple.
[0025] Further, the damping ring is made of PTFE.
[0026] The beneficial effect of the above further scheme is that the wear resistance is good, the service life is greatly improved, and the simulator durability life is improved from 50-100 thousand times to 220 million times required by the braking system. BRIEF DESCRIPTION OF DRAWINGS
[0027] Figure 1 It is a sectional view of the whole of the utility model.
[0028] Figure 2 It is an exploded view of the parts of the utility model.
[0029] Figure 3 It is a schematic view of the first support frame of the utility model.
[0030] Figure 4 It is a sectional view of the first support frame of the utility model.
[0031] Figure 5 It is a sectional view of the shell of the utility model.
[0032] Figure 6 It is a schematic view of the initial stage, middle stage and final stage of the pedal of the utility model.
[0033] In the drawings, the component list represented by each reference numeral is as follows:
[0034] 1, shell; 2, chamber; 3, cover plate; 4, first support frame; 5, second support frame; 6, first elastic element; 7, second elastic element; 8, ball push rod; 9, damping ring; 10, receiver part; 11, mounting groove; 12, magnet part; 13, ring groove; 14, transition rubber; 15, first counterbore; 16, third elastic element; 17, push rod; 18, adapter; 19, push rod spring; 20, dust cover; 21, pedal connecting rod; 22, damping ring mounting groove; 23, second counterbore; 24, sensor mounting groove. DETAILED DESCRIPTION
[0035] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.
[0036] Example 1
[0037] like Figures 1-2 As shown, a dry electronic pedal simulator with hysteresis characteristics includes a housing 1, a chamber 2 inside the housing 1, the inner peripheral wall of the chamber 2 being conical with one side of the larger end of the cone open, a cover plate 3 covering the open side of the chamber 2, a first support frame 4 and a second support frame 5 being slidably arranged sequentially in the chamber 2 away from the cover plate 3, a first elastic element 6 being arranged between the first support frame 4 and the second support frame 5, and a second elastic element 7 being arranged between the second support frame 5 and the bottom surface of the smaller end of the cone of the chamber 2, the elastic force of the second elastic element 7 being less than that of the first elastic element 6;
[0038] A ball-head push rod 8 is provided on the outer side of the cover plate 3. One end of the ball-head push rod 8 passes through the cover plate 3 and is connected to the first support frame 4. A damping ring 9 is provided on the outer periphery of the first support frame 4 to contact the inner peripheral wall of the chamber 2.
[0039] The beneficial effects of this embodiment are: when the ball head push rod 8 is pushed, the first elastic element 6 and the second elastic element 7 are gradually compressed, providing a segmented elastic force to simulate the pedal feel; the friction between the damping ring 9 and the inner wall of the conical chamber 2 provides a lag feel, the deeper the ball head push rod 8 is pushed in, the greater the friction between the damping ring 9 and the inner wall of the chamber 2, simulating the feeling that the lag feel of a traditional vacuum booster pedal increases with the increase of displacement.
[0040] Specifically, the first support frame 4 and the second support frame 5 are cylindrical, the first elastic element 6 and the second elastic element 7 are helical springs, the bottom surface of the first support frame 4 is provided with a first limiting step for limiting one end of the first elastic element 6, the top surface of the second support frame 5 is provided with a second limiting step for limiting the other end of the first elastic element 6, and the bottom surface of the second support frame 5 is provided with a limiting groove for the second elastic element 7 to prevent the spring from moving.
[0041] A damping ring mounting groove 22 is provided on the outer peripheral wall of the first support frame 4. The damping ring 9 is sleeved and fixed in the damping ring mounting groove 22. The outer diameter of the damping ring 9 is larger than the outer diameter of the first support frame 4. Therefore, the outer peripheral wall of the damping ring 9 and the inner peripheral wall of the chamber 2 are in an interference fit.
[0042] In this embodiment, in the initial state, both the first elastic element 6 and the second elastic element 7 are in the released state. When the ball head push rod 8 is pushed into the chamber 2, the ball head push rod 8 drives the first support frame 4 and the second support frame 5 to slide downward. Since the elastic force of the second elastic element 7 is less than that of the first elastic element 6, the second elastic element 7 is compressed first.
[0043] Until the second support frame 5 touches the bottom surface of the small end of the tapered chamber 2, the first elastic element 6 cannot be compressed, and the first support frame 4 gradually approaches the second support frame 5. When the bottom of the first support frame 4 abuts against the top surface of the second support frame 5, the stroke ends.
[0044] During the descent of the first support frame 4, the interference between the damping ring 9 and the inner wall of the tapered chamber 2 increases, resulting in an increasing friction force, which effectively simulates the hysteresis of a real brake pedal.
[0045] Hysteresis: When a passenger vehicle driver steps on the brake pedal, the system friction force acting on the foot during the forward stroke is greater than that during the return stroke, which makes the foot feel heavier. The difference between the force transmitted to the foot during the forward stroke and that during the return stroke at the same displacement is the hysteresis.
[0046] Embodiment 2
[0047] As shown in Figures 3-4 Preferably, based on Embodiment 1, a plurality of displacement sensor assemblies are included. The receiver part 10 of the displacement sensor assembly is fixed to the outer wall of the shell 1, the first support frame 4 is provided with a mounting slot 11 corresponding to the receiver part 10, and the magnet part 12 of the displacement sensor assembly is fixedly installed in the mounting slot 11.
[0048] Preferably, the mounting slot 11 is filled with cured glue.
[0049] In this embodiment, there are two displacement sensor assemblies, one on each side of the shell 1, which increases the fault tolerance and avoids losing monitoring capability when one side is damaged.
[0050] Sensor mounting slots 24 are provided on both sides of the shell 1, the receiver part 10 is fixedly installed in the sensor mounting slot 24 by screws, and the magnet part 12 is installed in the mounting slot 11. Then, cured glue is filled into the mounting slot 11 to prevent the parts from deforming and falling off after long-term use.
[0051] This embodiment eliminates the traditional special-shaped magnet support frame, reduces costs, and enables the magnet part 12 to be more firmly fixed to the first support frame 4, improving the positioning accuracy of the displacement sensor.
[0052] Embodiment 3
[0053] As shown in Figures 3-4 Preferably, based on Embodiments 1-2, a ring groove 13 is provided on the inner bottom surface of the chamber 2, a transition rubber 14 is arranged in the ring groove 13, and the top end of the transition rubber 14 protrudes out of the ring groove 13.
[0054] In this embodiment, the transition rubber 14 is a rubber ring. The transition rubber 14 is fixedly installed in the annular groove 13 on the bottom surface of the inner side of the chamber 2. When the ball head push rod 8 drives the first support frame 4 and the second support frame 5 to slide downward, the second elastic element 7 is compressed first due to its smaller elastic force. When the second support frame 5 touches the bottom surface of the chamber 2, the second support frame 5 will contact the top of the transition rubber 14. Then the second support frame 5 cannot continue to descend, and the first elastic element 6 will begin to be compressed.
[0055] During the above process, the transition rubber 14 ensures that after the second elastic element 7 is fully compressed, the first elastic element 6 intervenes more smoothly without any obvious step-like feeling.
[0056] As a parallel technical solution in this embodiment, the transition rubber 14 can also be replaced by a helical spring or other elastic element.
[0057] Example 4
[0058] like Figure 1 and Figure 5 As shown, preferably, based on embodiments 1-3, a first countersunk hole 15 is provided on the bottom surface of the inner side of the chamber 2, a third elastic element 16 is installed in the first countersunk hole 15, a push rod 17 is fixed on the first support frame 4, one end of the push rod 17 facing the cover plate 3 is connected to the ball head push rod 8, and the other end of the push rod 17 passes through the first support frame 4 and the second support frame 5 in sequence and points to the third elastic element 16. The distance between the push rod 17 and the third elastic element 16 is greater than the sliding stroke of the second support frame 5 and less than the sliding stroke of the first support frame 4.
[0059] In this embodiment, a second countersunk hole 23 is provided at the bottom of the chamber 2. Both the first countersunk hole 15 and the second countersunk hole 23 are coaxial with the annular groove 13. The second countersunk hole 23 is used to limit the bottom end of the second elastic element 7 to prevent it from moving.
[0060] When the first support frame 4 descends, the push rod 17 descends synchronously until the second elastic element 7 is fully compressed. After the second support frame 5 contacts the transition rubber 14, the push rod 17 still does not contact the third elastic element 16.
[0061] When the first elastic element 6 is about to be fully compressed and the bottom surface of the first support frame 4 is about to abut the top surface of the second support frame 5, the push rod 17 contacts the third elastic element 16 to provide a third elastic force, simulating the feeling of the foot hitting the bottom after the pedal has descended.
[0062] like Figure 6 As shown, the pedal feel is divided into three segments throughout the simulation;
[0063] Initial stage: Only the second elastic element 7 is compressed;
[0064] Middle section: after the second elastic element 7 is fully compressed, the first elastic element 6 begins to compress;
[0065] Final section: at the end of the compression of the first elastic element 6, the push rod 17 contacts the third elastic element 16, and the first elastic element 6 and the third elastic element 16 are compressed at the same time.
[0066] On the basis of the embodiment, the third elastic element 16 is selected to be a rubber spring, which can simulate a nonlinear elastic curve.
[0067] Embodiment 5
[0068] As shown in Figure 1 and Figure 2 Preferably, on the basis of embodiments 1-4, an adapter 18 is fixed to the end of the ball head push rod 8 away from the first support frame 4, a push rod spring 19 is sleeved on the outer periphery of the ball head push rod 8, one end of the push rod spring 19 abuts against the end face of the cover plate 3, and the other end abuts against the end face of the adapter 18.
[0069] Preferably, a dust cover 20 is sleeved on the outer periphery of the push rod spring 19, one end of the dust cover 20 is fixedly connected with the adapter 18, and the other end is fixedly connected with the cover plate 3.
[0070] Preferably, a pedal connecting rod 21 is fixedly connected to the end of the adapter 18 away from the ball head push rod 8.
[0071] In this embodiment, the elastic force of the push rod spring 19 is smaller than that of the second elastic element 7, and the push rod spring 19 is used to provide an initial force of the pedal, so as to avoid the feeling of lightness of the pedal by the operator.
[0072] The adapter 18 is fixedly connected with the ball head push rod 8 through threads, the pedal connecting rod 21 is fixedly connected with the adapter 18 through threads, and the dust cover 20 is sleeved on the outermost layer to protect the ball head push rod 8 and the cover plate 3, preventing dust from entering the chamber 2.
[0073] Embodiment 6
[0074] As shown in Figure 5 Preferably, on the basis of embodiments 1-5, the taper angle of the inner wall of the chamber 2 is 0.6°.
[0075] In this embodiment, the large end side of the taper of the inner wall of the chamber 2 is open and covered with the cover plate 3, and the small end side is closed, the damping ring 9 slides from the large end to the small end, the interference of the damping ring 9 is gradually increased through the taper angle of the inner wall of the chamber 2, and the friction of the damping ring 9 is increased, and the structure is simple.
[0076] On the basis of the embodiment, the taper angle of the inner wall of the chamber 2 can be any value in the interval of 0.1° to 20°.
[0077] Embodiment 7
[0078] As Figure 1 Preferred, on the basis of Embodiments 1-6, the material of the damping ring 9 is PTFE.
[0079] Specifically, the existing dry electronic pedal simulator hysteresis is mostly simulated by the friction between rubber and plastic or metal, the service life of rubber reciprocating friction is 50-100 thousand times, and the service life of the simulator is generally required to be reciprocated 2.2 million times, and the simulation service life is seriously insufficient.
[0080] In this embodiment, PTFE is polytetrafluoroethylene, which has good wear resistance and can greatly improve the service life, and the durability of the simulator is improved from 50-100 thousand times to 2.2 million times required by the braking system.
[0081] In the description of the utility model, it is understood that the orientation or positional relationship indicated by 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" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, and therefore cannot be understood as a limitation on the utility model.
[0082] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included at least one feature. In the description of the utility model, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.
[0083] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0084] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or 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.
[0085] 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 connection 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 does not necessarily refer to 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.
[0086] 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, and those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. A dry electronic pedal simulator having hysteresis characteristics, characterized by, The utility model provides a kind of displacement sensor, including shell (1), chamber (2) is opened in the shell (1), the inner periphery wall of chamber (2) is conical and conical big end is open, the cover plate (3) is equipped in chamber (2) open side cover, first support frame (4) and second support frame (5) are sequentially arranged in chamber (2) and slide away from the direction of cover plate (3), first elastic element (6) is arranged between first support frame (4) and second support frame (5), second elastic element (7) is arranged between second support frame (5) and the bottom surface of the small end of chamber (2) conical, and the elastic force of second elastic element (7) is less than first elastic element (6); The outer side of the cover plate (3) is provided with a ball head push rod (8), one end of the ball head push rod (8) penetrates through the cover plate (3) and is connected with the first support frame (4), and the outer periphery of the first support frame (4) is provided with a damping ring (9) in contact with the inner periphery wall of the chamber (2).
2. The dry electronic pedal simulator with hysteresis characteristics according to claim 1, characterized in that, The displacement sensor further comprises a plurality of displacement sensor assemblies, a receiver portion (10) of each displacement sensor assembly is fixed to the outer wall of the shell (1), a mounting groove (11) corresponding to the receiver portion (10) is formed in the first support frame (4), and a magnet portion (12) of each displacement sensor assembly is fixedly installed in the mounting groove (11).
3. A dry electronic pedal simulator with hysteresis characteristics according to claim 2, characterized in that, The mounting groove (11) is filled with cured glue.
4. The dry electronic pedal simulator with hysteresis characteristics according to claim 1, characterized in that, An annular groove (13) is formed in the inner bottom surface of the chamber (2), a transition rubber (14) is arranged in the annular groove (13), and the top end of the transition rubber (14) extends out of the annular groove (13).
5. A dry electronic pedal simulator with hysteresis characteristics according to claim 4, characterized in that, A first counterbore (15) is formed in the inner bottom surface of the chamber (2), a third elastic element (16) is installed in the first counterbore (15), a push rod (17) is fixedly arranged on the first support frame (4), one end of the push rod (17) facing the cover plate (3) is connected with the ball head push rod (8), the other end of the push rod (17) sequentially penetrates through the first support frame (4) and the second support frame (5) and points to the third elastic element (16), and the distance between the push rod (17) and the third elastic element (16) is greater than the sliding stroke of the second support frame (5) and less than the sliding stroke of the first support frame (4).
6. The dry electronic pedal simulator with hysteresis characteristics according to claim 1, characterized in that, One end of the ball head push rod (8) away from the first support frame (4) is fixedly provided with an adapter (18), a push rod spring (19) is sleeved on the outer periphery of the ball head push rod (8), one end of the push rod spring (19) abuts against the end face of the cover plate (3), and the other end of the push rod spring (19) abuts against the end face of the adapter (18).
7. A dry electronic pedal simulator with hysteresis characteristics according to claim 6, characterized in that, A dust cover (20) is sleeved on the outer periphery of the push rod spring (19), one end of the dust cover (20) is fixedly connected with the adapter (18), and the other end of the dust cover (20) is fixedly connected with the cover plate (3).
8. A dry electronic pedal simulator with hysteresis characteristics according to claim 7, characterized in that, The end of the adapter (18) away from the ball head push rod (8) is fixedly connected with a pedal connecting rod (21).
9. A dry electronic pedal simulator with hysteresis characteristics according to any one of claims 1 to 8, characterized in that, The conical angle of the inner wall of the chamber (2) is 0.6°.
10. A dry electronic pedal simulator with hysteresis characteristics according to any one of claims 1 to 8, characterized in that, The material of the damping ring (9) is PTFE.