Drive-by-wire brake pedal structure

Abstract

Provided in the present utility model is a drive-by-wire brake pedal structure, comprising: a base portion; a pedal, which has one end rotatably connected to the base portion by means of a rotating shaft; and a position detection device, which comprises a support and two non-contact angle sensors, wherein the support is fixed on the base portion; two electric signal interfaces are provided on the support; the non-contact angle sensors are electrically connected to the electric signal interfaces; each non-contact angle sensor has a detection portion fixed on the support; one of the non-contact angle sensors has a coil fixed to a rotating shaft, and the other non-contact angle sensor has a permanent magnet fixed to the rotating shaft; and when the pedal is rotated around the rotating shaft by force, one of the non-contact angle sensors obtains position information of the pedal based on rotation of the coil, the other non-contact angle sensor obtains position information of the pedal based on rotation of the permanent magnet, and the position information of the pedal is output through the electric signal interfaces. In this way, the reliability and safety of drive-by-wire brake are improved.

Description

Brake-by-wire pedal structure TECHNICAL FIELD

[0001] The utility model belongs to vehicle parts technical field, concretely relates to a brake-by-wire pedal structure. BACKGROUND

[0002] Unlike the brake system of traditional fuel vehicles, the brake system of new energy vehicles cannot utilize the vacuum degree of the engine, so it cannot utilize the traditional vacuum booster pump to brake. Almost all brake systems of new energy vehicles are electrically assisted, that is, a set of electric booster device is used to replace the original vacuum booster pump. With the development and maturity of electric control technology, brake-by-wire systems are gradually becoming a trend. Brake-by-wire systems use collected electrical signals of brake pedals to control electronic brake systems to brake. Unlike electronic brake systems, brake-by-wire systems no longer only assist drivers to apply brake force, but use motors and transmission devices to drive braking independently, and the force on the driver's foot will not be transmitted to the brake driving device. This puts forward higher reliability requirements for the control system and brake-by-wire pedals. Therefore, how to design a brake-by-wire structure with high reliability and high safety redundancy is a problem that needs to be solved in the field.

[0003] It should be noted that the information disclosed in the background section of the present application is only intended to deepen the understanding of the general background of the present application, and should not be regarded as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art.

[0004] CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a brake-by-wire pedal structure to improve the reliability and safety of the brake-by-wire pedal.

[0006] To achieve the above-mentioned purpose, the utility model provides a brake-by-wire pedal structure, which comprises:

[0007] a base;

[0008] a pedal, one end of the pedal being rotatably connected to the base through a rotating shaft; and

[0009] a position detection device, the position detection device comprising a bracket, a first non-contact angle sensor and a second non-contact angle sensor; the bracket being fixed to the base; the bracket being provided with two electrical signal interfaces; the first non-contact angle sensor and the second non-contact angle sensor being electrically connected to the two electrical signal interfaces one by one;

[0010] The first non-contact angle sensor and the second non-contact angle sensor each include a detection portion fixed on the support; the first non-contact angle sensor further includes a coil fixed at the rotating shaft; and the second non-contact angle sensor further includes a permanent magnet fixed at the rotating shaft.

[0011] When the pedal is rotated around the rotating shaft under force, the detection portion of the first non-contact angle sensor can obtain position information of the pedal based on rotation of the coil, and the detection portion of the second non-contact angle sensor can obtain position information of the pedal based on rotation of the permanent magnet, the position information of the pedal being used for outputting externally through the electrical signal interface.

[0012] Optionally, in the brake-by-wire pedal structure, one end of the pedal is provided with a groove, the groove divides the rotating shaft into two parts; the end of the pedal provided with the groove extends into the inner cavity of the base; the support includes an insertion portion, the insertion portion passes through a positioning installation opening on the base to enter the inner cavity and is inserted into the groove.

[0013] The coil and the permanent magnet are both arranged in the groove and are located on two sides of the groove along the direction of the rotation axis of the rotating shaft.

[0014] The detection portion of the first non-contact angle sensor and the detection portion of the second non-contact angle sensor are both fixed on the insertion portion; the detection portion of the first non-contact angle sensor is located on the same side of the insertion portion as the coil; and the detection portion of the second non-contact angle sensor is located on the same side of the insertion portion as the permanent magnet.

[0015] Optionally, in the brake-by-wire pedal structure, the two opposite groove walls of the groove along the direction of the rotation axis are each provided with a recess, and the coil and the permanent magnet are both fixed in the recesses.

[0016] Optionally, in the brake-by-wire pedal structure, the rotating shaft and the pedal are in an integral structure, and / or the detection portion of the first non-contact angle sensor and the detection portion of the second non-contact angle sensor are symmetrically arranged on two sides of the insertion portion.

[0017] Optionally, in the brake-by-wire pedal structure, the support further includes a fixing portion arranged at the top end of the insertion portion, the fixing portion is placed on the positioning installation opening and is detachably connected with the base; the positioning installation opening limits the depth of the insertion portion inserted into the groove; and the two electrical signal interfaces are arranged on the fixing portion and extend out of the base.

[0018] Optionally, in the brake-by-wire pedal structure, the fixed part is provided with at least two clamps on the side close to the insertion part, and the at least two clamps are in clamping connection with the inner cavity.

[0019] Optionally, in the brake-by-wire pedal structure, the base part is formed by combination of a base and a bottom cover plate; the base and the bottom cover plate form an inner cavity after combination, and the inner cavity is provided with a bearing; the inner cavity accommodates one end of the pedal and rotatably connects the rotating shaft through the bearing.

[0020] Optionally, both ends of the rotating shaft are provided with bushings, and the bushings are clamped in the bearing.

[0021] Optionally, in the brake-by-wire pedal structure, the brake-by-wire pedal structure further comprises an elastic buffering mechanism arranged on the base part; the elastic buffering mechanism is used for storing elastic potential energy when the pedal is pressed close to the elastic buffering mechanism under force; and the elastic buffering mechanism is further used for releasing the elastic potential energy to push the pedal to reset when the pedal is unloaded.

[0022] Optionally, in the brake-by-wire pedal structure, the elastic buffering mechanism comprises a spring, a buffering block and a spring seat; the spring seat is fixed on the base part; the buffering block is fixed on the spring seat; the spring is sleeved on the buffering block; one end of the spring is connected with the spring seat, and the other end of the spring is used for abutting against the pedal when the pedal is pressed close to the elastic buffering mechanism under force.

[0023] Optionally, in the brake-by-wire pedal structure, the detection part of the first non-contact angle sensor and the detection part of the second non-contact angle sensor each comprise a circuit board and an angle sensor chip integrated on the circuit board; the circuit board of the first non-contact angle sensor and the circuit board of the second non-contact angle sensor are independently arranged; the angle sensor chip of the first non-contact angle sensor can obtain position information of the pedal based on rotation of the coil, and the angle sensor chip of the second non-contact angle sensor can obtain position information of the pedal based on rotation of the permanent magnet.

[0024] Optionally, the first non-contact angle sensor comprises one or more angle sensor chips; and / or the second non-contact angle sensor comprises one or more angle sensor chips.

[0025] Optionally, the setting direction of the positioning mounting port is the same as the setting direction of the groove of the pedal.

[0026] Optionally, the first non-contact angle sensor is physically separated from the coil to facilitate complete sealing of the detection portion of the first non-contact angle sensor; and / or the detection portion of the second non-contact angle sensor is physically separated from the permanent magnet to facilitate complete sealing of the detection portion of the second non-contact angle sensor.

[0027] Compared with the prior art, the brake-by-wire pedal structure has at least the following advantages:

[0028] The brake-by-wire pedal structure comprises a base, a pedal rotatably connected to the base through a rotating shaft, and a position detection device comprising a bracket and two non-contact angle sensors.

[0029] In this way, on the one hand, the position of the pedal is detected by two different types of non-contact angle sensors simultaneously, thereby forming redundant detection; on the other hand, the detection methods of the two different non-contact angle sensors are different, which can effectively reduce the failure probability of pedal position detection and improve the reliability and safety of the brake-by-wire; and on the other hand, the use of non-contact angle sensors can achieve compact structure without the need for intermediate connecting parts, thereby improving the reliability and safety and the structural strength.

[0030] In a further improvement, one end of the foot pedal is provided with a groove, the groove divides the rotating shaft into two parts; the foot pedal is provided with the end with the groove extending into the inner cavity of the base; the support includes an insertion part, the insertion part passes through the positioning installation opening on the base into the inner cavity and is inserted into the groove; the coil and the permanent magnet are both arranged in the groove and are respectively located on two sides of the groove along the rotating axis direction of the rotating shaft; the detection part of one of the two non-contact angle sensors is fixed on the insertion part, and the detection part of the other non-contact angle sensor is located on the other side of the insertion part with the permanent magnet. Through the embodiment, the two non-contact angle sensors can be arranged in the rotating shaft and arranged on two sides of the groove, and the sensor arrangement makes the structure more compact, the volume of the whole device is smaller, and the reliability and safety of the vehicle are greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings are used to better understand the present application, and do not constitute improper limitations on the present application. Among them:

[0032] Fig. 1 is a front view of the structure of the brake-by-wire pedal structure according to an embodiment of the present application;

[0033] Fig. 2 is a perspective view of the structure of the brake-by-wire pedal structure according to an embodiment of the present application;

[0034] Fig. 3 is a left view of the structure of the brake-by-wire pedal structure according to an embodiment of the present application;

[0035] Fig. 4 is a top view of the structure of the brake-by-wire pedal structure according to an embodiment of the present application;

[0036] Fig. 5 is an exploded view of the structure of the brake-by-wire pedal structure according to an embodiment of the present application;

[0037] Fig. 6 is a partial view of the structure of the brake-by-wire pedal structure according to an embodiment of the present application; which shows the upper half of the base providing the bearing, the lower half of the bottom cover plate providing the bearing, and the combination of the base and the bottom cover plate forming a complete base;

[0038] Fig. 7 is a partial view of the structure of the pedal according to an embodiment of the present application;

[0039] Fig. 8 is a view of the structure of the bottom cover plate according to an embodiment of the present application;

[0040] Fig. 9 is a view of the structure of the base according to an embodiment of the present application;

[0041] Fig. 10 is a structural schematic view of the support in a first orientation according to an embodiment of the present application;

[0042] Fig. 11 is a structural schematic view of the support in a second orientation according to an embodiment of the present application, the first orientation being different from the second orientation;

[0043] Fig. 12 is a structural schematic view of the support and the pedal in pre-assembly in the second orientation according to an embodiment of the present application;

[0044] Fig. 13 is a structural schematic view of the support and the pedal in pre-assembly in the first orientation according to an embodiment of the present application;

[0045] Fig. 14 is a sectional structural schematic view of the support, the pedestal and the pedal in completed assembly according to an embodiment of the present application.

[0046] [The following is a description of reference numerals] 100 - base; 101 - bearing; 102 - inner cavity; 103 - positioning installation port; 110 - pedestal; 120 - bottom cover plate; 200 - foot pedal; 201 - rotating shaft; 202 - groove; 203 - recess; 204 - bushing; 210 - pedal; 220 - pedal arm; 300 - position detection device; 301 - support; 302 - electrical signal interface; 303 - detection portion; 304 - coil; 305 - permanent magnet; 306 - insertion portion; 307 - fixed portion; 308 - clasp; 400 - elastic buffering mechanism; 401 - spring; 402 - buffering block; 403 - spring seat. DETAILED DESCRIPTION

[0047] The embodiments of the present application will be described in detail with specific examples. Those skilled in the art can easily understand other advantages and functions of the present application from the content disclosed in the specification. The present application can be implemented or applied in other different embodiments, and each detail in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the drawings provided in the present embodiment only schematically illustrate the basic concept of the present application, and thus the drawings only show the components related to the present application rather than the number, shape and size of the components in actual implementation. The shape, number and proportion of each component in actual implementation can be randomly changed, and the layout pattern of the components can be more complex.

[0048] In addition, each of the following embodiments has one or more technical features, but this does not mean that all technical features in any embodiment must be implemented simultaneously, or only one or all technical features in different embodiments can be implemented separately. In other words, under the premise of being possible, the person skilled in the art can selectively implement part or all of the technical features in any embodiment according to the disclosure of the present application, and selectively implement part or all of the technical features in combination according to the design specification or implementation requirement, thereby increasing the flexibility of the present application.

[0049] As used in this specification, the singular forms "a," "an" and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense of "and / or" unless the content clearly dictates otherwise, and the terms "mounting", "connected", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection. It can be mechanical connection or electrical connection. It can be directly connected or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. The relationship terms such as "first", "second" and the like are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations, nor indicate or imply relative importance or implicitly indicate the number of indicated technical features. 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", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. 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.

[0050] The present application aims to provide a kind of brake-by-wire pedal structure, the brake-by-wire pedal structure has the advantages of high reliability, high safety redundancy.

[0051] In order to make the purpose, advantages and characteristics of the utility model more clear, the utility model will be explained in further detail below in combination with the drawings. It should be noted that the drawings are all in a very simplified form and all use non-precise proportions, and are only used to facilitate and clearly assist the purpose of explaining the utility model embodiments.

[0052] Please refer to Fig. 1 to Fig. 14, the utility model provides a kind of brake-by-wire pedal structure, comprising: base 100;Pedal 200, one end of pedal 200 is rotatably connected on base 100 by pivot 201;And position detection device 300, position detection device 300 includes bracket 301 and two kinds of non-contact angle sensor.Base 100 as the support part of entire pedal structure, to install pedal 200 and position detection device 300.Base 100 specific structure is not specially limited.Pedal 200 can be stepped on by driver to generate brake signal.Pedal 200 mainly includes pedal 210 and pedal arm 220, please refer to Fig. 5, one end of pedal arm 220 is provided with pedal 210, the other end of pedal arm 220 is connected on base 100 by pivot 201, according to this, pedal 200 is rotated relative to base 100 with pivot 201 as reference.

[0053] For position detection device 300, it is fixed on base 100 by bracket 301.The fixed mode between bracket 301 and base 100 can use detachable fixing or non-detachable fixing, more preferably detachable fixed mode.The detachable fixed mode can be various commonly used detachable connection modes, such as threaded connection, bolt connection, buckle connection, especially preferably buckle connection, easy to install and disassemble, can realize tool-free disassembly.

[0054] Bracket 301 is also provided with two electrical signal interfaces 302, each electrical signal interface 302 has the function of power supply, grounding and signal transmission, and then two non-contact angle sensors are electrically connected with two electrical signal interfaces 302 one by one.That is, each non-contact angle sensor is composed of three wires, which are power line, ground wire and signal line.

[0055] Further, two non-contact angle sensors all include detection part 303 (see Fig. 10 and Fig. 11 and Fig. 14).Here, for the convenience of description, the detection part 303 of two non-contact angle sensors adopts the same symbol mark, but it does not mean that the structure and function of the detection part 303 of two non-contact angle sensors are the same.More specifically, the detection part 303 of two non-contact angle sensors is fixed on bracket 301, and the fixed position of detection part 303 can be set as required, especially considering that the detection part 303 of two non-contact angle sensors is symmetrically arranged, which can effectively improve the compactness of structure, reduce weight and reduce cost.

[0056] In addition to the above, one non-contact angle sensor is an inductive sensor, which further comprises a coil 304 (see FIG. 5, FIG. 12 and FIG. 13) fixed to the rotating shaft 201, and the inductive sensor uses the change of self-induction or mutual inductance of the coil 304 to achieve non-contact measurement, specifically, the detection part 303 senses the position of the coil 304 through an induced current signal, and then determines the action of the pedal 200; and the other non-contact angle sensor is a magnetic sensor, which further comprises a permanent magnet 305 (see FIG. 5, FIG. 12 and FIG. 13) fixed to the rotating shaft 201, and the magnetic sensor can detect the angular position of the permanent magnet 305 installed on the rotating shaft 201, and then achieve non-contact measurement. The coil 304 and the permanent magnet 305 can change the angle following the rotation of the rotating shaft 201. The shape and size of the coil 304 and the permanent magnet 305 are not limited, such as ring-shaped or non-ring-shaped structures can be used, and the present application is not limited to this.

[0057] As can be understood, the detection part 303 of each non-contact angle sensor is physically separated from the component (such as the coil 304 and the permanent magnet 305) fixed to the rotating shaft 201, which is beneficial to completely seal the detection part 303, thereby eliminating the possibility of dust or moisture intrusion. The sealing method of the detection part 303 is to seal through the shell provided by the bracket 301 itself, or to seal by pouring glue.

[0058] In some embodiments of the present application, the detection part 303 of each non-contact angle sensor comprises a circuit board and an angle sensor chip integrated on the circuit board, which can be referred to FIG. 11 and FIG. 14. It should be noted that the circuit boards of the two non-contact angle sensors are independently arranged and do not interfere with and affect each other. The angle sensor chip of one non-contact angle sensor can obtain the position information of the pedal 200 based on the rotation of the coil 304, and the angle sensor chip of the other non-contact angle sensor can obtain the position information of the pedal 200 based on the rotation of the permanent magnet 305. Here, the angle sensor chip selected by the present application is various commonly used angle measurement chips, and since it does not involve improvement of this part, those skilled in the art can select appropriate existing angle measurement chips to obtain the corresponding technical effects and achieve the corresponding functions. Specifically, those skilled in the art should be able to know how to arrange the magnetic sensor and the inductive sensor according to the prior art, and understand their working principles, and therefore the present application will not be described in detail.

[0059] It should be further pointed out that each non-contact angle sensor can comprise one or more angle sensor chips, and the plurality of angle sensor chips refers to 2 or more, and generally 2 is more appropriate. In addition, the circuit board is preferably a PCB (printed circuit board).

[0060] The working mode of the brake-by-wire pedal structure provided by the utility model is as follows: when the pedal 200 is rotated around the rotating shaft 201 under force, the detection part 303 of a non-contact angle sensor can obtain the position information (rotating angle) of the pedal 200 based on the rotation of the coil 304, specifically, the inductive current obtains the position of the coil 304, and meanwhile, the detection part 303 of another non-contact angle sensor can obtain the position information of the pedal 200 based on the rotation of the permanent magnet 305, that is, the angular position of the permanent magnet 305 is obtained based on the change of the magnetic field, finally, the position information of the pedal 200 is outputted to the outside through the electrical signal interface 302. It should be noted that the position information of the pedal 200 monitored by the two kinds of non-contact angle sensors is respectively outputted to the outside through a corresponding electrical signal interface 302, thereby improving the reliability of the redundant detection.

[0061] Here, those skilled in the art should understand that when the brake-by-wire technology is used, the brake signal is generated and transmitted by monitoring the brake intention of the driver through the position detection device 300, that is, the mechanical signal (rotation) of the brake pedal 210 is converted into an electrical control signal, and the electrical control signal is transmitted to the control system and the actuator, specifically, the brake-by-wire technology can be understood by referring to the prior art, and the present application will not be described in detail.

[0062] Therefore, in the brake-by-wire pedal structure provided by the utility model, the angle sensor for detecting the position of the pedal 210 is set as two different types of non-contact angle sensors, which not only forms the redundant detection of the pedal position, but also adopts two different position detection methods, so that the failure probability of the pedal position detection can be effectively reduced, and the reliability and safety of the brake-by-wire technology are greatly improved. Furthermore, the use of the non-contact angle sensor is easy to achieve a compact structure, and an intermediate connecting piece is not needed, so that the reliability and safety are higher, and the structural strength is also good.

[0063] Further, please refer to Figs. 12-14, and combine Figs. 7, 10-11, in some preferred embodiments, one end of the pedal 200 (i.e. the end of the pedal arm 220 away from the pedal 210) is provided with a groove 202, and the groove 202 divides the rotating shaft 201 into two parts, which facilitates the installation of the detection parts 303 of the two non-contact angle sensors between the two parts of the rotating shaft 201.

[0064] It should be further pointed out that the rotating shaft 201 and the pedal 200 can be a split forming structure, more preferably, the rotating shaft 201 and the pedal 200 are an integral forming structure (such as integral injection molding), which has good strength and low cost. Here, the integral forming structure means that the rotating shaft 201 and the pedal 200 are formed at one time, and the split forming structure means that the rotating shaft 201 and the pedal 200 are formed independently. Regardless of this, the two ends of the rotating shaft 201 in the direction of the rotating axis of the rotating shaft 201 protrude out of the pedal 200, and then can be rotatably connected with the bearing 101 on the base 100.

[0065] Meanwhile, the footrest 200 is provided with one end of the groove 202 extending into the inner cavity 102 of the base 100. In addition, the bracket 301 preferably comprises an insertion portion 306 which extends through the positioning installation opening 103 on the base 100 into the inner cavity 102 of the base 100 and is inserted into the groove 202, so that the detection portions 303 of the two non-contact angle sensors can be arranged next to the corresponding coils 304 and permanent magnets 305, and the detection portions 303 can be symmetrically or asymmetrically arranged on both sides of the insertion portion 306. Preferably, the detection portions 303 are symmetrically arranged on both sides of the insertion portion 306. Correspondingly, the coils 304 and permanent magnets 305 are arranged in the groove 202 and are respectively located on both sides of the groove 202 along the rotation axis direction of the rotating shaft 201, and in this way, the coils 304 and permanent magnets 305 are arranged between the two divided parts of the rotating shaft 201. Thus, the detection portions 303 of the two non-contact angle sensors are fixed on the insertion portion 306, and the detection portion 303 of one non-contact angle sensor is located on the same side of the insertion portion 306 as the coil 304, and the detection portion 303 of the other non-contact angle sensor is located on the same side of the insertion portion 306 as the permanent magnet 305. In this embodiment, the two non-contact angle sensors are arranged inside the rotating shaft 201 and are separately arranged on both sides of the bracket 301 along the rotation axis direction, and this arrangement makes the structure more compact and the entire device smaller, greatly improving the reliability and safety of the vehicle.

[0066] Further, referring to FIGS. 12-14, in some preferred embodiments, the groove 202 is provided with recesses 203 on both opposite groove walls along the rotation axis direction, and the coils 304 and permanent magnets 305 are fixed in the recesses 203. The provision of the recesses 203 provides convenience for installing the coils 304 and permanent magnets 305 without occupying the internal space of the groove 202.

[0067] As above, the bracket 301 and the base 100 are preferably detachable fixed. In this regard, please refer to Figs. 5, 10-11 and 14, in some embodiments of the present application, the bracket 301 further comprises a fixing portion 307, which is arranged at the top end of the insertion portion 36, and the fixing portion 307 is used for positioning and installing the whole bracket 301, and is also used for fixedly connecting with the base 100. In specific embodiments, the base 100 is provided with an inner cavity 102, and the inner cavity 102 is provided with a positioning installation opening 103 in the preset insertion direction, and the setting direction of the positioning installation opening 103 is the same as or different from the setting direction of the pedal 200, and is preferably the same; the inner cavity 102 accommodates one end of the pedal 200 provided with the groove 202, and then the fixing portion 307 is placed in the positioning installation opening 103 and detachably connected with the base 100, and the insertion portion 306 is limited in depth by the fixing portion 307 to insert into the groove 202, that is, the insertion portion 306 can be directly aligned and inserted into the groove 202 after passing through the positioning installation opening 103 and entering the inner cavity 102, and the positioning installation opening 103 can limit the depth of the insertion portion 306 during the insertion process, thereby effectively ensuring the positioning accuracy of the position detection device 300. In this way, the positioning installation opening 103 supports the fixing portion 307, and the fixing portion 307 is preferably detachably connected with the base 100, and as a more preferred scheme, the fixing portion 307 is provided with at least two clamping hooks 308 (see Figs. 10 and 11) on the side close to the insertion portion 306, and the at least two clamping hooks 308 are clamped and connected with the inner cavity 102, and the number of clamping hooks 308 is not limited, for example, in the present embodiment, four clamping hooks 308 are arranged on the fixing portion 307, but in fact, two or three can also be used. Based on this, the two electrical signal interfaces 302 are arranged on the fixing portion 307 and located on the side of the fixing portion 307 away from the insertion portion 306, and the two electrical signal interfaces 302 need to protrude out of the base 100.

[0068] In some embodiments of the present application, the base 100 is preferably assembled from two parts, which facilitates the assembly of the foot pedal 200 and the position detection device 300. Specifically, the base 100 is formed by combining the base 110 and the bottom cover plate 120; wherein the base 110 and the bottom cover plate 120 combine to form the inner cavity 102, and the bearing 101 is provided at the inner cavity 102 (see Figs. 6-9 for details); the bearing 101 is in the form of a through hole and communicates with the inner cavity 102. When assembling the base 100 and the foot pedal 200, first place the foot pedal 200 in place, then cover the base 110 and the bottom cover plate 120 at one end of the foot pedal 200. When covering, the upper half of the bearing 101 provided by the base 110 and the lower half of the bearing 101 provided by the bottom cover plate 120 are wrapped around the shaft 201, so that the shaft 201 is rotatably connected with the bearing 101, and finally the base 110 and the bottom cover plate 120 are fixed. In addition, when assembling the position detection device 300, for example, in an embedded layout, first assemble the bracket 301 into the base 110 and fix it, then assemble the base 110 and the bracket 301 as a whole with the foot pedal 200, only need to insert the insertion part 306 of the bracket 301 into the groove 202 of the foot pedal 200, after installation, cover the bottom cover plate 120, and finally fix the bottom cover plate 120 and the base 110.

[0069] As an option, as shown in Fig. 5, the shaft 201 is sleeved with a bushing 204 at both ends. However, in other embodiments, the shaft 201 can also be selected not to use the bushing 204. If the bushing 204 is used, the bushing 204 is clamped in the bearing 101, and when the foot pedal 200 rotates, the shaft 201 constantly rubs against the bushing 204, avoiding constant friction between the shaft 201 and the bearing 101, solving the problem of severe wear of the shaft 201 after long-term use of the foot pedal 200. At the same time, the larger surface area of the bushing 204 can effectively support the shaft 201, making it more stable and avoiding deformation of the shaft 201. Preferably, the shaft 201 is made of anti-slip material, which is beneficial to reduce noise, such as rubber, PVC and other materials.

[0070] In some embodiments of the present application, the drive-by-wire brake pedal structure further comprises an elastic buffer mechanism 400 provided on the base 100, which is used to store elastic potential energy when the foot pedal 200 is pressed against the elastic buffer mechanism 400 under force, and is also used to release the elastic potential energy to push the foot pedal 200 back to its original position when the force on the foot pedal 200 is removed. The elastic buffer mechanism 400 can have various structural forms, in addition to springs, other elastic structures can also be used to achieve elastic buffering. The following is a demonstrative description.

[0071] Please refer to Figs. 5 and 6, in an optional embodiment, the elastic buffering mechanism 400 comprises a spring 401, a buffering block 402 and a spring seat 403; the spring seat 403 is fixed on the base 100, and in this embodiment, the spring seat 403 is fixed on the base 110; the buffering block 402 is fixed on the spring seat 403; the spring 401 is sleeved on the buffering block 402; one end of the spring 401 is connected with the spring seat 403, and the other end of the spring 401 is used to abut against the foot pedal 200 when the foot pedal 200 is pressed to be close to the elastic buffering mechanism 400, at this time, the foot pedal 200 is pressed against the spring force.

[0072] In summary, the brake-by-wire pedal structure has the advantages that two different types of non-contact angle sensors are used to detect the position of the pedal, forming redundant detection, and the detection methods of the two different non-contact angle sensors are different, which can effectively reduce the failure probability of the pedal position detection, improve the reliability and safety of the brake-by-wire, and the use of the non-contact angle sensor can realize compact structure without the need of introducing intermediate connecting parts, so that the reliability and safety are higher and the structural strength is better.

[0073] In further improvement, the two non-contact angle sensors are symmetrically arranged on the two sides of the support, and in combination with the high-strength shaft fixing design, high reliability is realized, and the structure is compact, light in weight and low in cost, which can provide better in-vehicle space and weight reduction for vehicles using the technology, and the high reliability and high safety redundancy of the position detection provide higher safety guarantee for the brake system.

[0074] Finally, it should be further pointed out that the brake-by-wire pedal structure can be applied to various vehicles, thereby improving the reliability and safety of the vehicles using the brake-by-wire technology.

[0075] Although the utility model discloses as above, but is not limited to this. The person skilled in the art can make various modifications and alternations to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and alternations of the utility model belong to the scope of the utility model claims and equivalent technologies, the utility model also intends to include these modifications and alternations.

Claims

1. A brake pedal structure with drive-by-wire, characterized in that, include: Base; A foot pedal, one end of which is rotatably connected to the base via a pivot. as well as A position detection device includes a bracket, a first non-contact angle sensor, and a second non-contact angle sensor; the bracket is fixed to the base; the bracket is provided with two electrical signal interfaces; the first non-contact angle sensor and the second non-contact angle sensor are electrically connected to the two electrical signal interfaces in a one-to-one correspondence. Both the first type of non-contact angle sensor and the second type of non-contact angle sensor include a detection part fixed on the bracket; the first type of non-contact angle sensor also includes a coil fixed at the rotating shaft; the second type of non-contact angle sensor also includes a permanent magnet fixed at the rotating shaft. When the foot pedal is subjected to force and rotates around the pivot, the detection part of the first type of non-contact angle sensor can obtain the position information of the foot pedal based on the rotation of the coil, and the detection part of the second type of non-contact angle sensor can obtain the position information of the foot pedal based on the rotation of the permanent magnet. The position information of the foot pedal is used to output to the outside through the electrical signal interface.

2. The brake pedal structure according to claim 1, characterized in that, One end of the foot pedal is provided with a groove, which divides the rotating shaft into two parts; the end of the foot pedal with the groove extends into the inner cavity of the base; the bracket includes an insertion part, which passes through the positioning and mounting port on the base, enters the inner cavity, and is inserted into the groove; The coil and the permanent magnet are both disposed in the groove and are located on both sides of the groove along the rotation axis of the rotating shaft. The detection portion of the first type of non-contact angle sensor and the detection portion of the second type of non-contact angle sensor are both fixed on the insertion portion; the detection portion of the first type of non-contact angle sensor and the coil are located on the same side of the insertion portion; the detection portion of the second type of non-contact angle sensor and the permanent magnet are located on the other side of the insertion portion.

3. The brake pedal structure according to claim 2, characterized in that, The groove has recesses on both opposite groove walls along the rotation axis, and the coil and the permanent magnet are fixed in the recesses.

4. The brake pedal structure according to claim 2, characterized in that, The pivot and the foot pedal are integrally formed.

5. The brake pedal structure according to claim 2, characterized in that, The detection portion of the first type of non-contact angle sensor and the detection portion of the second type of non-contact angle sensor are symmetrically arranged on both sides of the insertion portion.

6. The brake pedal structure according to claim 2, characterized in that, The bracket also includes a fixing part located at the top of the insertion part, the fixing part resting on the positioning mounting port and being detachably connected to the base; the positioning mounting port limits the depth to which the insertion part is inserted into the groove; two electrical signal interfaces are located on the fixing part and extend out of the base.

7. The brake pedal structure according to claim 6, characterized in that, The fixing part is provided with at least two hooks on the side near the insertion part, and at least two of the hooks are engaged with the inner cavity.

8. The brake pedal structure according to claim 1, characterized in that, The base is formed by combining a base and a bottom cover plate; the base and the bottom cover plate together form an inner cavity, and a bearing is provided in the inner cavity; the inner cavity accommodates one end of the foot pedal and is rotatably connected to the rotating shaft through the bearing.

9. The brake pedal structure according to claim 8, characterized in that, Bushings are fitted at both ends of the rotating shaft, and the bushings are secured inside the bearing.

10. The brake pedal structure according to claim 1 or 2, characterized in that, It also includes an elastic buffer mechanism disposed on the base; the elastic buffer mechanism is used to store elastic potential energy when the foot pedal is pressed close to the elastic buffer mechanism under force; the elastic buffer mechanism is also used to release the elastic potential energy when the foot pedal is released from force, so as to push the foot pedal to reset.

11. The brake pedal structure according to claim 10, characterized in that, The elastic cushioning mechanism includes a spring, a buffer block, and a spring seat; the spring seat is fixed to the base; the buffer block is fixed to the spring seat; the spring is sleeved on the buffer block; one end of the spring is connected to the spring seat, and the other end of the spring is used to abut against the foot pedal when the foot pedal is pressed close to the elastic cushioning mechanism under force.

12. The brake pedal structure according to claim 1 or 2, characterized in that, Both the detection portion of the first type of non-contact angle sensor and the detection portion of the second type of non-contact angle sensor include a circuit board and an angle sensor chip integrated on the circuit board; the circuit board of the first type of non-contact angle sensor and the circuit board of the second type of non-contact angle sensor are independently arranged; the angle sensor chip of the first type of non-contact angle sensor can obtain the position information of the foot pedal based on the rotation of the coil, and the angle sensor chip of the second type of non-contact angle sensor can obtain the position information of the foot pedal based on the rotation of the permanent magnet.

13. The brake pedal structure according to claim 12, characterized in that, The first type of non-contact angle sensor includes one or more of the aforementioned angle sensor chips; and / or The second type of non-contact angle sensor includes one or more of the aforementioned angle sensor chips.

14. The brake pedal structure according to claim 2, characterized in that, The orientation of the positioning mounting port is the same as the orientation of the groove of the foot pedal.

15. The brake pedal structure according to claim 1, characterized in that, The first type of non-contact angle sensor is physically separated from the coil to facilitate a complete seal of the detection portion of the first type of non-contact angle sensor; and / or The detection portion of the second type of non-contact angle sensor is physically separated from the permanent magnet to facilitate a complete seal of the detection portion of the second type of non-contact angle sensor.

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