Brake push rod mechanism, vehicle brake displacement sensing system and vehicle

Abstract

The embodiment of the utility model provides a brake push rod mechanism, a vehicle brake displacement sensing system and a vehicle. The brake push rod mechanism comprises a push rod assembly, a gear, a rotating shaft and an information collector. One end of the push rod assembly is used for being connected with a brake pedal, the push rod assembly can move along with movement of the brake pedal, a plurality of teeth are arranged on the push rod assembly, and the teeth are arranged on the outer side face of the push rod assembly at intervals in the length extending direction of the push rod assembly. The gear is arranged on the rotating shaft in a sleeving manner, and the gear is meshed with the teeth so as to drive the gear to rotate under the movement of the push rod assembly; the rotating shaft is sleeved with the information collector so as to collect angular displacement information of the rotating shaft and convert the angular displacement information into linear displacement information of the push rod assembly so as to control tightening and releasing of a brake disc of a brake system. Therefore, the brake push rod mechanism has the advantage of being high in regulation and control accuracy.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, specifically to a brake push rod mechanism and a vehicle braking displacement sensing system and a vehicle having the brake push rod mechanism. Background Technology

[0002] Most traditional vehicles use a vacuum booster for braking, which cannot be decoupled (the brake pedal is coupled to the master cylinder). Therefore, changes in hydraulic braking force will inevitably lead to changes in the driver's pedal feel, and the pedal feel is not adjustable. As a result, the brake pedal feedback is poor during regenerative braking, and the vehicle cannot complete regenerative braking.

[0003] In related technologies, integrated brake assist systems often use Hall effect displacement sensors to detect the displacement and speed of the pushrod and convert them into signals that are transmitted to the vehicle's electronic control unit (ECU). The ECU then combines this information with the control strategy to send control commands to the motor, thereby improving the vehicle's braking performance. However, the output signal of the Hall effect sensor is affected by temperature, exhibiting temperature drift, which affects the accuracy of the measurement. Furthermore, the Hall effect sensor is highly sensitive to the amplitude and direction of the external magnetic field. If a strong magnetic field exists in the surrounding environment or the magnetic field direction is unstable, it may significantly affect the measurement results, leading to poor feedback braking accuracy. Utility Model Content

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a brake push rod mechanism. This brake push rod mechanism has the advantages of high adjustment accuracy and convenient installation.

[0005] An embodiment of this utility model also proposes a vehicle braking displacement sensing system.

[0006] An embodiment of this utility model also proposes a vehicle.

[0007] The brake push rod mechanism of this utility model embodiment includes a push rod assembly, a gear, a rotating shaft, and an information collector.

[0008] One end of the push rod assembly is used to connect to the brake pedal. The push rod assembly can move with the movement of the brake pedal. The push rod assembly has multiple teeth, which are spaced apart along the length of the push rod assembly on its outer surface. The gear is sleeved on the rotating shaft and meshes with the teeth to drive the gear to rotate as the push rod assembly moves. The information collector is sleeved on the rotating shaft to collect the angular displacement information of the rotating shaft and convert it into the linear displacement information of the push rod assembly to control the tightening and releasing of the brake disc of the braking system.

[0009] The brake push rod mechanism of this utility model, by setting a toothed structure on the push rod assembly that meshes with a gear structure, and by acquiring the movement information of the push rod assembly through an information acquisition device, provides highly accurate position feedback when the gear and rack system is used in conjunction with the information acquisition device. It can also detect the rotation angle of the gears and calculate the linear displacement using the known module of the gears and rack. Furthermore, the design of the gears and teeth typically ensures good linearity, meaning there is a good linear relationship between the displacement and the encoder output signal, simplifying displacement calculation, reducing susceptibility to external environmental influences, and avoiding the poor braking stability problems caused by Hall effect sensors in related technologies. Therefore, the meshing transmission structure helps improve the accuracy of brake control.

[0010] Secondly, this data collector operates on a non-contact basis, making it less prone to failure due to mechanical wear, thus reducing maintenance requirements and offering high reliability. Furthermore, the design of mounting the data collector on the rotating shaft generally facilitates easy installation.

[0011] Therefore, the brake push rod mechanism of this utility model embodiment has the advantages of high adjustment accuracy and high installation convenience.

[0012] In some embodiments, the push rod assembly includes a piston assembly, a mounting plate, and a push rod body. The piston assembly is arranged in a hole in the mounting plate along the thickness direction of the mounting plate. One end of the push rod body is connected to a brake pedal, and the other end of the push rod body is connected to the piston assembly to push the piston assembly to reciprocate relative to the mounting plate. The push rod body can drive the piston assembly to reciprocate along the thickness direction of the mounting plate when the brake pedal is depressed. The push rod body has a plurality of teeth, which are spaced apart on the outer wall surface of the push rod body along the length extension direction of the push rod body.

[0013] In some embodiments, the mounting plate includes a mounting plate body and a limiting ring sleeve protruding outward on one side along the thickness direction of the mounting plate body. The mounting plate has a limiting hole in the area where the limiting ring sleeve is located, and the piston assembly is slidably inserted through the limiting hole at one end of the push rod body.

[0014] In some embodiments, the side of the limiting hole has a limiting protrusion, and one end of the piston assembly can abut against the limiting ring body.

[0015] In some embodiments, the push rod assembly further includes a flexible limiting member, the limiting hole being clearance-fitted with the push rod body, and the flexible limiting member filling the gap between the push rod body and the limiting hole.

[0016] In some embodiments, the piston cylinder of the piston assembly includes a cylinder portion and an abutment plate portion. The abutment plate portion is disposed on the inner wall surface of the cylinder portion to divide the cylinder portion into a piston sliding cavity and a push rod mating cavity. The push rod body passes through the push rod mating cavity and the other end of the push rod body is connected to the abutment plate portion.

[0017] In some embodiments, the piston assembly further includes one of a ball joint and a ball head connected to the abutment plate portion, and the other of the ball joint and the ball head is disposed on the other end of the push rod body, wherein the ball head is universally fitted within the ball joint.

[0018] In some embodiments, the teeth on the push rod assembly are straight teeth, the sidewall of the push rod body is a flat plate, and there are multiple straight teeth, which are spaced apart on the flat plate along the length extension direction of the push rod assembly.

[0019] In some embodiments, the information collector is an encoder, which outputs continuous pulse signals to monitor the actual rotation angle and rotational speed of the gear.

[0020] The vehicle braking displacement sensing system of this utility model embodiment includes a brake pedal, a brake disc, a controller, and a brake push rod mechanism according to any one of the above. The brake pedal is connected to the push rod body, and the push rod body can move with the movement of the brake pedal. The information collector is signal-connected to the controller to drive the clamping and releasing of the brake disc.

[0021] The vehicle of this embodiment includes the vehicle braking displacement sensing system described above. Attached Figure Description

[0022] Figure 1 This is a half-sectional perspective view of the brake push rod mechanism according to an embodiment of the present utility model.

[0023] Figure 2 This is another perspective view of a half-section of the brake push rod mechanism according to an embodiment of the present invention, showing the movement of the push rod assembly.

[0024] Figure 3 This is an exploded cross-sectional view of the brake push rod mechanism according to an embodiment of the present invention.

[0025] Figure label:

[0026] Push rod assembly 1; piston cylinder 11; cylinder body 111; abutment plate 112; ball joint 113;

[0027] Mounting plate 12; Mounting plate body 121; Limiting ring sleeve body 122;

[0028] Limiting hole 123; piston sliding cavity 1231; push rod mating cavity 1232;

[0029] Limiting protrusion 124;

[0030] Putter body 13; ball head 131;

[0031] Flexible limiting component 14; teeth 15;

[0032] Gear 2;

[0033] Shaft 3;

[0034] Information collector 4. Detailed Implementation

[0035] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] The following is for reference. Figures 1-3 This invention describes a brake push rod mechanism, a vehicle brake displacement sensing system, and a vehicle according to embodiments of the present invention.

[0037] The brake push rod mechanism of this utility model embodiment includes a push rod assembly 1, a gear 2, a rotating shaft 3, and an information collector 4.

[0038] One end of the push rod assembly 1 is used to connect to the brake pedal. The push rod assembly 1 can move with the movement of the brake pedal (not shown). The push rod assembly 1 has a plurality of teeth 15, which are spaced apart on the outer surface of the push rod assembly 1 along the length extension direction of the push rod assembly 1. The gear 2 is sleeved on the rotating shaft 3 and meshes with the teeth 15 to drive the gear 2 to rotate when the push rod assembly 1 moves. The information collector 4 is sleeved on the rotating shaft 3 to collect the angular displacement information of the rotating shaft 3 and convert it into the linear displacement information of the push rod assembly 1 to control the tightening and releasing of the brake disc of the braking system.

[0039] The brake push rod mechanism of this embodiment uses a toothed structure on the push rod assembly 1 that meshes with the gear 2 structure. An information acquisition device 4 acquires the movement information of the push rod assembly 1. When the gear 2 and rack system are used in conjunction with the information acquisition device 4, they can provide very precise position feedback. The information acquisition device 4 can detect the rotation angle of the gear 2 and calculate the linear displacement using the known modules of the gear 2 and rack. Furthermore, the design of the gear 2 and its teeth typically ensures good linearity, meaning there is a good linear relationship between the displacement and the encoder's output signal. This simplifies displacement calculation, reduces susceptibility to external environmental influences, and avoids the poor braking stability problems caused by Hall effect sensors in related technologies. Therefore, the meshing transmission structure helps improve the accuracy of brake control.

[0040] Secondly, this detection method is non-contact, making it less prone to failure due to mechanical wear, thus reducing maintenance requirements and offering high reliability. Furthermore, mounting the data acquisition unit 4 onto the rotating shaft 3 is a design that is generally easy to install.

[0041] Therefore, the brake push rod mechanism of this utility model embodiment has the advantages of high adjustment accuracy and high installation convenience.

[0042] like Figures 1 to 3 As shown, the push rod assembly 1 includes a piston assembly (excluding piston cylinder 11, other components are not shown), a mounting plate 12, and a push rod body 13. The piston assembly is arranged in a hole in the mounting plate 12 along the thickness direction of the mounting plate 12. One end of the push rod body 13 is used to connect with the brake pedal, and the other end of the push rod body 13 can be connected with the piston assembly to push the piston assembly to reciprocate relative to the mounting plate 12. The push rod body 13 can drive the piston assembly to reciprocate along the thickness direction of the mounting plate 12 when the brake pedal is depressed. The push rod body 13 has a plurality of teeth 15, which are spaced apart on the outer wall surface of the push rod body 13 along the length extension direction of the push rod body 13.

[0043] The brake push rod mechanism of this embodiment divides the push rod assembly 1 into a piston assembly, a mounting plate 12, and a push rod body 13. The piston assembly and push rod body 13 enable precise braking control, especially in applications requiring progressive braking, allowing for smooth adjustment of braking force. Simultaneously, the piston assembly typically amplifies the input force, meaning a larger braking torque can be generated with a smaller force, thus reducing the burden during braking. Furthermore, the mounting plate 12 enhances the stability of the movement and engagement between the push rod body 13 and the piston assembly. Therefore, this brake push rod mechanism has the advantages of simple structure and good stability.

[0044] It is understood that the piston assembly includes a piston cylinder 11, a piston body, and a piston rod, with the piston rod connected to the piston body and the piston body slidably disposed within the piston cylinder 11.

[0045] Furthermore, the pivot 3 is connected to the vehicle body via a bearing.

[0046] like Figures 1 to 3 As shown, the mounting plate 12 includes a mounting plate body 121 and a limiting ring sleeve 122 protruding outward along one side of the thickness direction of the mounting plate body 121. The mounting plate 12 has a limiting hole 123 in the area with the limiting ring sleeve 122. The piston assembly is slidably mounted on one end of the push rod body 13 through the limiting hole 123.

[0047] The brake push rod mechanism of this embodiment divides the mounting plate 12 into a mounting plate body 121 and a limiting ring sleeve 122 protruding outward along one side of the mounting plate body 121's thickness direction. The piston assembly is slidably mounted on one end of the push rod body 13 through the limiting hole 123, thereby generating a force to limit the swing of the piston assembly. Therefore, this brake push rod mechanism effectively improves the overall stability of the vehicle braking system and extends its service life.

[0048] like Figures 1 to 3 As shown, the side of the limiting hole 123 has a limiting protrusion 124, and one end of the piston assembly can abut against the limiting protrusion 124 to limit the piston assembly to avoid the problem of excessive range of motion of the piston assembly.

[0049] The brake push rod mechanism of this embodiment of the invention limits the movement of the piston assembly by providing a limiting protrusion 124 on the side of the limiting hole 123. Therefore, this brake push rod mechanism has the advantage of good structural stability.

[0050] Optionally, the limiting protrusion 124 can be an annular limiting protrusion 124 along its body.

[0051] The brake push rod mechanism of this utility model embodiment also includes a flexible limiting member 14, the limiting hole 123 is clearance-fitted with the push rod body 13, and the flexible limiting member 14 fills the gap between the push rod body 13 and the limiting hole 123.

[0052] The brake push rod mechanism of this embodiment utilizes a flexible limiting member 14. This flexible limiting member 14 fills the gap between the push rod body 13 and the limiting hole 123. When the push rod body 13 is subjected to the force of the brake pedal, the direction of this force is not necessarily aligned with the length extension direction of the push rod body 13. When these directions are not aligned, a component force perpendicular to the length extension direction of the push rod body 13 will appear, causing the push rod body 13 to swing. The flexible limiting member 14 can restrict the swing of the push rod body 13 in all directions around its circumference. During this process, it ensures that the gear 2 and rack maintain a gapless meshing, thus fully compensating for defects in machining and installation. This improves the overall operational stability of the brake push rod mechanism.

[0053] like Figures 1 to 3 As shown, the piston cylinder 11 of the piston assembly includes a cylinder portion 111 and an abutment plate portion 112. The abutment plate portion 112 is disposed on the inner wall surface of the cylinder portion 111 to divide the cylinder portion 111 into a piston sliding cavity 1231 and a push rod mating cavity 1232. The push rod body 13 passes through the push rod mating cavity 1232 and the other end of the push rod body 13 is connected to the abutment plate portion 112.

[0054] The brake push rod mechanism of this embodiment divides the piston assembly into a cylindrical part 111 and an abutment plate part 112. The abutment plate part 112 is disposed on the inner wall surface of the cylindrical part 111, dividing the cylindrical part 111 into a piston sliding cavity 1231 and a push rod mating cavity 1232. The push rod body 13 passes through the push rod mating cavity 1232, and the other end of the push rod body 13 is connected to the abutment plate part 112. That is, it can be understood that the push rod body 13 mates with the push rod mating cavity 1232, and the push rod mating cavity 1232 can limit the swing of the push rod body 13. Therefore, this brake push rod mechanism has the advantage of structural stability.

[0055] Optionally, the cylinder portion 111 and the abutment plate portion 112 can be integrally formed. Therefore, the brake push rod mechanism of this embodiment has the advantage of good structural integrity.

[0056] The piston assembly also includes one of a ball joint 113 and a ball head 131 connected to the abutment plate 112, and the other of the ball joint 113 and ball head 131 is provided on the other end of the push rod body 13. The ball head 131 can be universally fitted within the ball joint 113. It can be understood that the piston assembly has a ball joint 113 and the other end of the push rod body 13 has a ball head 131; or the piston assembly has a ball head 131 and the other end of the push rod body 13 has a ball joint 113.

[0057] The brake push rod mechanism of this embodiment connects the push rod body 13 directly to the piston assembly via a universal ball joint 131, which avoids direct impact between the push rod body 13 and the piston assembly, thus preventing excessive wear. Therefore, this brake push rod mechanism has the advantage of good structural flexibility.

[0058] This utility model embodiment is not limited to this; for example, in other embodiments, such as... Figures 1 to 3 As shown, the teeth 15 on the push rod assembly 1 are straight teeth, and the side wall of the push rod body 13 is a flat plate, with the straight teeth set on the flat plate. Therefore, the brake push rod mechanism of this embodiment has the advantages of simple structure and good stability.

[0059] The information acquisition device is an encoder, which is used to output continuous pulse signals to monitor the actual rotation angle and rotation speed of the gear.

[0060] The brake push rod mechanism of this embodiment uses an encoder, gear 2, and rack (tooth 15) to brake the vehicle's braking system, providing highly accurate position feedback. The encoder detects the rotation angle of gear 2 and calculates the linear displacement using the known module of gear 2 and rack. Furthermore, the design of gear 2 and rack typically ensures good linearity, meaning there is a good linear relationship between the displacement and the encoder's output signal, simplifying displacement calculation. Compared to directly measuring linear displacement, the gear 2 and rack system converts it into rotational motion for measurement, which is generally more stable and reliable, and less susceptible to external interference. Therefore, the brake push rod mechanism of this embodiment further improves braking accuracy.

[0061] The vehicle braking displacement sensing system of this utility model embodiment includes a brake pedal, a brake disc, a controller, and a brake push rod mechanism according to any one of the above. The brake pedal is connected to the push rod body 13, and the push rod body 13 can move with the movement of the brake pedal. The information collector 4 is signal-connected to the controller to drive the tightening and release of the brake disc.

[0062] Therefore, the vehicle braking displacement sensing system of this utility model has the advantages of high control accuracy and high installation convenience.

[0063] The vehicle of this utility model embodiment includes a vehicle braking displacement sensing system according to any one of the above claims.

[0064] Therefore, the vehicle of this utility model embodiment has the advantages of high control accuracy and high installation convenience.

[0065] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0067] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0068] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0069] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0070] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A braking push rod mechanism, characterized in that, include: A push rod assembly, one end of which is connected to a brake pedal, the push rod assembly being movable as the brake pedal moves, and the push rod assembly having teeth; A gear and a shaft, the gear being fitted onto the shaft and meshing with the teeth to drive the gear to rotate as the push rod assembly moves; An information collector is fitted onto the rotating shaft to collect angular displacement information of the rotating shaft and convert it into linear displacement information of the push rod assembly, so as to control the tightening and releasing of the brake disc in the braking system.

2. The brake push rod mechanism according to claim 1, characterized in that, The push rod assembly includes a piston assembly, a mounting plate, and a push rod body. The piston assembly passes through the mounting plate along its thickness direction. One end of the push rod body is connected to a brake pedal, and the other end of the push rod body is connected to the piston assembly to push the piston assembly to reciprocate relative to the mounting plate. The push rod body can drive the piston assembly to reciprocate along the thickness direction of the mounting plate when the brake pedal is depressed. The push rod body has multiple teeth, which are spaced apart on the outer wall surface of the push rod body along its length direction.

3. The brake push rod mechanism according to claim 2, characterized in that, The mounting plate includes a mounting plate body and a limiting ring sleeve that protrudes outward on one side along the thickness direction of the mounting plate body. The mounting plate has a limiting hole in the area where the limiting ring sleeve is located. The piston assembly is slidably inserted through the limiting hole at one end of the push rod body.

4. The brake push rod mechanism according to claim 3, characterized in that, The limiting hole has a limiting protrusion on its side, and one end of the piston assembly can abut against the limiting protrusion.

5. The brake push rod mechanism according to claim 3, characterized in that, The push rod assembly also includes a flexible limiting member, the limiting hole being clearance-fitted with the push rod body, and the flexible limiting member filling the gap between the push rod body and the limiting hole.

6. The brake push rod mechanism according to claim 2, characterized in that, The piston cylinder of the piston assembly includes a cylinder body and an abutment plate. The abutment plate is disposed on the inner wall of the cylinder body to divide the cylinder body into a piston sliding cavity and a push rod mating cavity. The push rod body passes through the push rod mating cavity and the other end of the push rod body is connected to the abutment plate.

7. The brake push rod mechanism according to claim 6, characterized in that, The piston assembly further includes one of a ball joint and a ball head connected to the abutment plate portion, and the other of the ball joint and the ball head is disposed on the other end of the push rod body, wherein the ball head can be universally fitted into the ball joint.

8. The brake push rod mechanism according to any one of claims 2-7, characterized in that, The teeth on the push rod assembly are straight teeth, the sidewall of the push rod body is a flat plate, there are multiple straight teeth, and the straight teeth are spaced apart on the flat plate along the length extension direction of the push rod assembly; And / or, the information acquisition device is an encoder, which is used to output continuous pulse signals to monitor the actual rotation angle and rotation speed of the gear.

9. A vehicle braking displacement sensing system, characterized in that, The device includes a brake pedal, a brake disc, a controller, and a brake push rod mechanism according to any one of claims 2-8, wherein the brake pedal is connected to the push rod body, the push rod body is movable as the brake pedal moves, and the information collector is signal-connected to the controller to drive the clamping and releasing of the brake disc.

10. A vehicle, characterized in that, Including the vehicle braking displacement sensing system according to claim 9.

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