Brake caliper, configuration method and vehicle

Abstract

The invention provides a brake caliper, a configuration method and a vehicle, and relates to the field of automobile parts. The brake caliper comprises a caliper body, a piston, a screw rod and a friction plate; a piston is arranged in the sliding groove of the caliper body in a sliding mode. A screw rotating in the axial direction is correspondingly arranged in the first end direction of the piston. A nut is arranged on the screw rod in a thread fit mode, the nut is arranged in the sliding groove of the caliper body in a sliding mode, and the nut is fixedly connected with the piston. Friction plates are arranged in the grooves of the brake calipers, the friction plates are correspondingly arranged at the second ends of the pistons, space intervals exist between the friction plates and the pistons, gaps used for containing the brake disc are formed between the friction plates, and the friction plates are used for clamping the brake disc under the thrust of the pistons in the vehicle brake state. According to the application, after the braking state of the vehicle is released, the friction plate can also quickly loosen the clamping state of the brake disc on the basis of quickly releasing the thrust, and the resistance moment to the brake rotary disc can be quickly reduced, so that the loss of the friction plate is reduced, and the driving safety of the vehicle is ensured.

Description

Technical Field

[0001] The present application relates to the field of automobile components, and in particular to a brake caliper, a configuration method and a vehicle. Background Art

[0002] The drag torque is the residual resistance torque that prevents the brake disc from rotating after the hydraulic pressure of the brake is released. When the drag torque is too high, it will not only affect the fuel consumption of the vehicle, but also cause the vehicle to shake during driving and braking, causing abnormal braking or grinding noises, and even locking in severe cases. In addition, it will also shorten the life of the friction plate, increase the disc temperature, and affect the driving safety of the vehicle. Summary of the invention

[0003] In view of this, the present application provides a brake caliper, a configuration method and a vehicle, the main purpose of which is to solve the problem that the braking effect caused by the drag torque is not actually completely released when the braking state is released in the existing brake caliper.

[0004] To achieve the above-mentioned purpose, the present application discloses a brake caliper in a first aspect, comprising: a caliper body, a piston, a nut, a screw and a friction plate;

[0005] A piston is slidably arranged in the slide groove of the caliper body;

[0006] A screw that rotates in the axial direction is correspondingly arranged in the direction of the first end of the piston;

[0007] A nut is provided in cooperation with the thread on the screw rod, the nut is slidably arranged in the slide groove of the caliper body, and the nut is fixedly connected to the piston;

[0008] A friction plate is arranged in the groove of the brake caliper. The friction plate is arranged correspondingly at the second end of the piston and has a space gap between the friction plate and the piston when the vehicle is not braked. There is a gap between the friction plates for accommodating the brake disc. When the vehicle is braked, the friction plate is used to clamp the brake disc under the thrust of the piston.

[0009] Optionally, the brake caliper further includes: a clamping portion;

[0010] The clamping portion is used to clamp the friction plate so that the friction plate is located at a fixed position when the brake caliper is in an unbraking state.

[0011] Optionally, the fixed position is set between the absolute zero position of the piston and the target contact position, the absolute zero position is the position where the piston of the brake caliper is farthest from the brake disc, and the target contact position is the position when the piston pushes the friction plate to contact the brake disc.

[0012] Optionally, the clamping portion further includes: a spring;

[0013] The spring is connected to the friction plate, and is used for controlling the friction plate to return to the fixed position when the friction plate is not acted upon by the thrust of the piston.

[0014] In a second aspect of the present application, an embodiment provides a method for configuring a brake caliper, comprising:

[0015] Obtaining an absolute zero position of the brake caliper, where the absolute zero position is the position where the piston of the brake caliper is farthest from the brake disc;

[0016] Start the braking state, and use the piston to push the friction plate to clamp the brake disc;

[0017] confirming a target contact position between the friction plate and the brake disc, at which the clamping effect of the friction plate on the brake disc reaches a target threshold;

[0018] Between the absolute zero position and the target contact position, a fixed position of the friction plate in a non-braking state is set.

[0019] Optionally, the determining the target contact position between the friction plate and the brake disc includes:

[0020] Acquiring working parameters of an external motor, wherein the external motor is used to control the displacement of the piston;

[0021] confirming the displacement value of the piston according to the variation curve of the working parameter and the clamping effect of the friction plate on the brake disc;

[0022] The target contact position between the friction plate and the brake disc is determined using the displacement value.

[0023] Optionally, in a non-braking state, when the friction plate is in the fixed position, a distance between the friction plate and the brake disc is smaller than a distance between the piston and the friction plate.

[0024] In a third aspect of the present application, an electronic device is provided, including:

[0025] At least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute any one of the methods disclosed in the second aspect.

[0026] In a fourth aspect of the present application, an embodiment provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method described in the second aspect is implemented.

[0027] A fifth embodiment of the present application provides a vehicle, in which the brake caliper as described in the first aspect is mounted.

[0028] In summary, the technical solution disclosed in the present application is mainly used to solve the problem that the braking effect caused by the drag torque is not completely released after the vehicle is released from the braking state. The present application provides a brake caliper, including: a caliper body, a piston, a screw and a friction plate; a piston is slidably arranged in the slide groove of the caliper body; a screw that rotates axially is arranged in the direction corresponding to the first end of the piston; a nut is arranged in cooperation with the thread on the screw, the nut is slidably arranged in the slide groove of the caliper body, and the nut is fixedly connected to the piston; a friction plate is arranged in the groove of the brake caliper, the friction plate is arranged corresponding to the second end of the piston and there is a space interval between the piston, there is a gap between the friction plates for accommodating the brake disc, and the friction plate is used to clamp the brake disc under the thrust of the piston when the vehicle is in the braking state. The technical solution of this embodiment sets a space interval between the friction plate and the piston. When the vehicle is released from the braking state, because the friction plate is not directly connected to the piston, the piston and the screw can realize rapid return according to the command of the motor, and release the thrust on the friction plate at the same time. Because there is a space interval between the friction plate and the piston, after the thrust of the piston on the friction plate is released, the friction plate no longer squeezes the brake disc, and there is no resistance torque on the brake disc. The brake caliper of the present application can quickly release the clamping state of the friction plate on the brake disc on the basis of quickly releasing the thrust of the piston on the friction plate when the braking state is released, quickly reduce the drag torque of the friction plate on the brake disc, and quickly release the actual braking effect, thereby reducing the loss of the friction plate and ensuring the safety of vehicle driving.

[0029] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0032] Figure 1 A structural diagram of a brake caliper provided in an embodiment of the present application is shown;

[0033] Figure 2 A schematic diagram of the fixed connection between the piston and the nut provided in an embodiment of the present application is shown;

[0034] Figure 3 A flow chart of a brake caliper configuration method provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0035] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0036] Drag force is a kind of residual stress, which generally appears in the hydraulic disc brake of the car parking system. The braking process of the brake is that after the passenger steps on the brake, the brake piston is pushed by the hydraulic oil in the working cylinder. When it is pushed to a certain distance, the brake piston pushes the friction plate to clamp the rotating brake disc, so that the brake disc stops, thereby achieving the purpose of braking. However, when the brake state is released, since the friction plate cannot return to its position quickly, there is still residual friction between the friction plate and the brake disc, that is, the braking torque. If the friction force is too large, specifically, the user releases the brake pedal, but there is still residual friction between the friction plate and the brake disc, that is, the drag torque, which affects the driving experience and increases the energy consumption of the vehicle.

[0037] Since traditional brake calipers use hydraulic braking, they inevitably use a floating piston structure, that is, the push-out and return of the piston rely on hydraulic pressure and the sealing ring in the caliper cylinder hole. The sealing coil is installed between the working cylinder and the piston. That is, during the braking process, hydraulic pressure is generated and the piston is pushed, and the sealing ring is deformed at this time; when the brake is released, the hydraulic pressure is cancelled, and the piston relies on the deformation restoration of the sealing ring to achieve return. There is a return time difference between the lifting of the brake pedal and the return of the piston. During this time, the friction plate will still generate friction with the brake disc, that is, the drag torque. In the existing technical solution, in order to reduce the drag torque, the deformation of the sealing ring is generally optimized so that the optimized sealing ring can control the rapid return of the piston after the brake is released, and minimize the duration of the friction torque. However, this improvement method will affect another important parameter-the required fluid volume of the caliper. In order to balance the relationship between the required fluid volume of the caliper and the drag torque of the caliper, the deformation of the sealing ring needs to be controlled within a reasonable range, which makes it difficult for traditional calipers to achieve a lower drag torque.

[0038] In order to solve the problem that the braking effect caused by the drag torque between the friction plate and the brake disc is not completely released when the brake state is released during vehicle driving, the present application provides the following embodiments to solve the above problem:

[0039] This embodiment provides a brake caliper, such as Figure 1 , which is a structural diagram of a brake caliper of this embodiment, the brake caliper mainly comprises: a caliper body 1, a piston 2, a nut 3, a screw 4 and a friction plate 5;

[0040] A piston 2 is slidably arranged in a slide groove in a caliper body 1 of the brake caliper; a screw 4 that rotates axially is arranged in a corresponding direction of the first end of the piston 2; a nut 3 is threadedly arranged on the screw 4, the nut 3 is slidably arranged in the slide groove of the caliper body, and the nut 3 is fixedly connected to the piston 2; a friction plate 5 is arranged in a groove of the brake caliper, the friction plate 5 is correspondingly arranged at the second end of the piston, and there is a space gap between the friction plates 5 for accommodating the brake disc, and the friction plate 5 is used to clamp the brake disc under the thrust of the piston 2 when the vehicle is in a braking state.

[0041] The caliper body is the main part of the brake caliper, and a slide groove is arranged inside it. Specific components can reciprocate along the track of the slide groove. Among them, the above-mentioned specific components include a piston 2 and a nut 3. Among them, the first end of the piston 2 is connected to the nut 3, and a screw 4 is arranged in the screw hole of the nut 3. The piston and the nut are fixedly connected. Therefore, the screw rotates between the nuts, driving the nut to reciprocate along the slide groove. At the same time, because the nut is directly connected to the piston, the piston also reciprocates in the slide groove with the nut, and there is also a corresponding relationship between the second end of the piston and the friction plate. Therefore, the friction plate can clamp the brake disc according to the thrust brought by the reciprocating motion of the piston, that is, Figure 1 The distance between the friction plates 5 is close.

[0042] It is understood that the brake disc is constantly moving during the operation of the vehicle. When braking the vehicle, it is necessary to reduce the speed of the brake disc, that is, to use the clamping of the friction plate, the pressure and friction between the friction plate and the brake disc to reduce the speed of the brake disc. Since the traditional brake caliper adopts hydraulic braking, it is inevitable to adopt a floating piston structure, that is, the piston is pushed out by the pressure given by the hydraulic pressure, and the return is based on the deformation recovery of the sealing ring in the caliper cylinder. If the drag torque needs to be reduced, it is necessary to increase the pulling force when the piston returns, and pull the piston to return to the position by increasing the pulling force of the deformation recovery of the sealing ring. Specifically, the deformation of the sealing ring is optimized, but this optimization method will affect another important parameter-the required fluid volume of the caliper. More caliper required fluid volume is required, which increases the space and weight burden of the vehicle. In order to balance the relationship between the required fluid volume and the caliper drag torque at the same time, the deformation of the sealing ring needs to be controlled within a reasonable range, so that the drag torque is difficult to achieve.

[0043] In the technical solution of this embodiment, the piston and the nut are fixedly connected, such as Figure 2 The fixed connection diagram of the piston and the nut is shown in FIG. Figure 2 In the figure, a is the connection between the piston and the nut. The nut and the screw are connected by a threaded rotation. The screw drives the nut to move directly, so that the piston reciprocates in the slide groove. When the vehicle is not braked, there is a space gap between the friction plate and the piston, such as Figure 1 The piston 2 and the friction plate 5 are shown to be non-fixedly connected, and there is a space gap between them in the non-braking state. During the braking process, the piston moves quickly to push the friction plate and contact the brake disc, so that the friction plate clamps the brake disc, reduces the rotation speed of the brake disc, and has a deceleration effect on the vehicle. When the brake is released, the screw pulls the piston back quickly, and there is no fixed connection device between the friction plate and the piston. The friction plate is no longer affected by the thrust of the piston, and the friction plate does not apply pressure to the brake disc. When the rotation speed of the brake disc is accelerated, the friction plate will not generate a resistance torque due to the pressure applied to the brake disc, which can achieve the function of reducing the drag torque when the vehicle is released from the braking state.

[0044] In the technical solution of this embodiment, compared with the brake caliper with a fixedly connected piston, nut, screw and friction plate, under the same material, the brake caliper of this embodiment proposes that there is a space between the piston and the friction plate. Because the components pulled by the screw include the nut and the piston, compared with the screw needing to pull the nut, piston and friction plate at the same time, the total mass that the screw needs to pull is reduced. In the braking state, the piston can give thrust to the friction plate more quickly, so that the friction plate can quickly clamp the brake disc and shorten the braking response time. When the brake is released, due to the reduction of the total mass, the piston can also respond to the command of the motor more quickly and return quickly in the slide groove, and at the same time, the thrust on the friction plate is cancelled. The friction plate no longer clamps the brake disc, and there is no drag torque, which realizes the rapid release of the braking effect, thereby reducing the loss of the friction plate and ensuring the safety of vehicle driving.

[0045] In a possible embodiment, the brake caliper further includes: a clamping portion;

[0046] The clamping portion is used to clamp the friction plate so that the friction plate is located in a fixed position when the brake caliper is in an unbraking state.

[0047] The edge of the brake disc is placed in the groove of the brake caliper and rotates rapidly therein. Without a fixed connection between the friction plate and the piston, the friction plate is clamped by the clamping part so that the position of the friction plate is always in the groove of the brake caliper. At the same time, when the brake caliper is in a braking state or a braking state, the clamping part can support the change of the displacement of the friction plate under the thrust of the piston. At the same time, when the brake caliper is in a non-braking state, the clamping part can clamp the friction plate to keep it in a fixed position in the brake caliper.

[0048] In a possible embodiment, the fixed position is set between the absolute zero position of the piston and the target contact position, the absolute zero position is the position where the piston of the brake caliper is farthest from the brake disc, and the target contact position is the position when the piston pushes the friction plate to contact the brake disc.

[0049] In this embodiment, the setting of the fixed position is further described, and the fixed position is between the absolute zero position of the piston and the target contact position. The piston slides back and forth inside the slide groove of the brake caliper, and the position of the brake disc is used as a reference. The position of the piston in the slide groove when it is farthest from the brake disc is used as the absolute zero position, and the position of the piston when the piston pushes the friction plate to contact the brake disc is used as the target contact position. The fixed position is set between the absolute zero position and the target contact position. At the same time, in the non-braking state of the brake caliper, there is a space gap between the piston and the friction plate.

[0050] The absolute zero position is the position in the slide groove where the piston is farthest from the brake disc. However, in the actual use of the brake caliper, the fixed position of the piston in the non-braking state may not be at the absolute zero position. The fixed position of the piston can be used as a preset position, which is between the absolute zero position and the fixed position. In the braking state, the piston starts from the preset position and gradually approaches the friction plate. After the friction plate contacts the brake disc, it pushes the friction plate to gradually approach the brake disc. When the target contact position is reached, the friction plate contacts the brake disc to generate a resistance torque that hinders the rotation of the brake disc. The piston further pushes the friction plate until the brake disc is clamped and the brake disc stops rotating.

[0051] In a possible embodiment, the clamping portion further includes: a spring;

[0052] The spring is connected to the friction plate and is used to control the friction plate to return to a fixed position when no external force is applied.

[0053] On the basis of the clamping part proposed above, this embodiment further discloses a spring structure. During the braking process, under the influence of the piston thrust, the friction plate clamps the brake disc. At this time, the spring is considered to be in a stretched state. On the basis that the piston can return quickly, as the thrust acting on the friction plate disappears, the friction plate can also return quickly under the action of the spring, and the drag torque of the vehicle is reduced. At the same time, the risk of contact between the friction plate and the brake disc when the friction plate is too close to the brake disc is avoided. On the basis of ensuring the service life of the friction plate, it is ensured that the vehicle does not have the problem of false braking caused by the contact between the friction plate and the brake disc, and the safety of use is further ensured.

[0054] During the release of the braking state, the piston moves toward the absolute zero position, thereby releasing the thrust on the friction plate. After the friction plate is no longer subject to the thrust of the piston, it continuously reduces the pressure on the brake disc until the pressure stops. When the pressure exerted by the friction plate on the brake disc stops, it can be considered that there is no friction torque on the brake disc. The piston gradually moves from the position of clamping the brake disc to the preset position, and after the thrust on the friction plate disappears, the friction plate gradually returns to the fixed position due to the elastic force of the spring. When the piston exceeds the fixed position during the process of returning to the preset position, the friction plate returns to the fixed position. When the piston reaches the preset position, the braking state is completely released and the brake caliper is in a non-braking state.

[0055] In a possible embodiment, a through hole is provided at one end of the caliper body, so that the screw rod is connected to the external motor through the through hole.

[0056] In order to realize the pushing out and returning of the piston, it is disclosed in the above-mentioned embodiment that the rotation of the screw drives the displacement value of the nut. Due to the fixed connection between the nut and the piston, the control of the piston position is realized. This embodiment further proposes that the rotation of the screw is controlled by the motor outside the brake caliper. At the same time, it is connected to the motor through the through hole of the brake caliper. By using the through hole, the screw realizes the movement connection between the piston in the brake caliper slide groove and the external motor.

[0057] In the technical solution of the present application, an embodiment is proposed, and a configuration method of a brake caliper is disclosed, which is used to configure the brake caliper, especially the configuration of the fixed position of the friction plate, including:

[0058] Step 301, obtaining the absolute zero position of the brake caliper, where the absolute zero position is the position where the piston of the brake caliper is farthest from the brake disc.

[0059] When the piston is at the absolute zero position, it is farthest from the brake disc, that is, the piston is at the farthest distance from the brake disc in the slide groove under the pulling action of the screw. The position of the piston is affected by the pulling action of the screw. At the same time, the farthest distance that the piston can reach from the brake disc is also limited by the slide groove length value of the cylinder body, the size of the nut and the size of the piston. Based on the above factors, the piston is pulled by the screw to make the piston reach the position farthest from the brake disc, and this position is determined as the absolute zero position. At the same time, the absolute zero position can also be used as the stable position of the piston in the slide groove when the brake is completely released. In a possible embodiment, a feasible way to determine the absolute zero position can be determined by an angle position sensor.

[0060] Step 302, starting the braking state, using the piston to push the friction plate to clamp the brake disc.

[0061] When the vehicle is in a braking state, the main function of the piston is to push the friction plate to control the brake disc to stop rotating. At this time, the hydraulic control motor pushes the screw to rotate, and the screw drives the nut and pushes the piston in the slide groove in the caliper body to gradually approach the brake disc. Therefore, it can be understood that, under the premise that the friction plate can clamp the brake disc and stop the brake disc, at this time, the position where the piston pushes the friction plate to clamp the brake disc is the closest position between the piston and the brake disc. In the content of this embodiment, the clamping process can be a process of gradually slowing down the brake disc until it stops, so the position of the piston when the piston pushes the friction plate to clamp the brake disc can be regarded as the closest position.

[0062] In combination with the above process, the farthest position of the piston in the slide groove of the caliper body, that is, the absolute zero position, and the closest position are respectively obtained, so as to determine the movement range of the piston.

[0063] Step 303, confirming the target contact position between the friction plate and the brake disc, at which the clamping effect of the friction plate on the brake disc reaches a target threshold;

[0064] The phenomenon mainly targeted by this embodiment is the drag torque when the brake is released, and the generation of the drag torque is mainly due to the contact between the friction plate and the brake disc, so when the brake disc rotates, the drag torque is generated between the friction plate and the brake disc. In order to avoid the generation of the drag torque, it is first necessary to clarify the position of the friction plate when the friction between the friction plate and the brake disc causes the drag torque. Therefore, the target contact position proposed in the content of this embodiment is the position where the friction plate just comes into contact with the brake disc and generates the drag torque when the brake disc rotates.

[0065] In a feasible embodiment, confirming the target contact position between the friction plate and the brake disc includes:

[0066] Obtain the working parameters of the external motor, which is used to control the displacement of the piston; confirm the displacement value of the piston according to the change curve of the working parameters and the clamping effect of the friction plate on the brake disc; and determine the target contact position between the friction plate and the brake disc using the displacement value.

[0067] It can be understood that in the braking state, the control motor rotates the screw to push the piston and the friction plate. In the process from the friction plate contacting the brake disc to clamping the brake disc, the thrust of the motor is gradually subject to increasing resistance. Under different resistances, the control motor used to control the rotation of the screw will be in different working states, corresponding to different working parameters. Therefore, a specific method for obtaining the target contact position is proposed in the content of this embodiment. In the process of the friction plate continuously clamping the brake disc, some working parameters of the motor, such as the working current, will increase with the increasing clamping resistance, and the current value will change linearly and reach an extreme value. The main purpose of this embodiment is to realize the calculation of the fixed position of the friction plate. Therefore, in order to achieve zero drag torque, the friction plate in the fixed position cannot be in contact with the brake disc, and in order to ensure that the friction plate does not contact the brake disc, it is necessary to determine the position of the friction plate when the friction plate just contacts the brake disc, that is, the target contact position. In the braking state, the external motor drives the piston to push the friction plate to gradually clamp the brake disc. By observing the change curve of the external motor's working parameters, such as the change curve of the working current, it is found that the working current tends to be stable in the process of the external motor pushing the piston from a position away from the brake disc to the target contact position. However, when the piston reaches the target contact position, there is contact between the friction plate and the brake disc, and the power consumed by the external motor increases. Therefore, when reaching this position, the working current of the external motor will have an obvious jump process. Combined with the distance that the external motor pushes the piston when the jump current is generated, the target contact position can be calculated.

[0068] Step 304, setting a fixed position of the friction plate in a non-braking state between the absolute zero position and the target contact.

[0069] A friction plate is arranged between the absolute zero position and the target contact position. The selection of the fixed position of the friction plate needs to be selected in combination with the spatial interval value, so that when the friction plate is in the fixed position, it has no contact with the piston and the brake disc and is in a non-braking state; and when in the braking state, when the friction plate is pushed by the piston, it can quickly approach and clamp the brake disc from the fixed position.

[0070] This embodiment realizes the selection of the fixed position of the friction plate. In order to realize the space interval between the friction plate and the piston, this embodiment first obtains the farthest distance between the piston and the brake disc, or it can also be the stable position of the piston in the slide groove when the brake is completely released, that is, the absolute zero position; after confirming the target contact position when the friction plate just contacts the brake disc under the action of thrust, at this target contact position, the friction plate just begins to play a braking role on the brake disc. From the perspective of braking observation, the just playing braking role can be judged by the change of the current value, and from the perspective of braking effect, it can be determined based on whether the braking deceleration of the brake disc reaches the target threshold. After the accurate positioning of the target contact position is achieved, the interval value of the fixable interval from which the fixed position of the friction plate can be selected can be determined, wherein the fixable interval is the interval in which the fixed position of the friction plate can be set. The first critical point of the fixable interval is obtained by using the absolute zero position, the size of the piston, and the difference between the space interval value between the friction plate and the piston; the second critical point is the target contact position, and the position interval between the first critical point and the second critical point is the fixable interval of the friction plate. On the basis of the absolute zero position and the target contact position, the friction plate is set between the absolute zero position and the target zero position. The friction plate can achieve a spatial gap with the piston and can also clamp the brake disc by utilizing the thrust of the piston in the braking state. At the same time, in the non-braking state, it does not contact the brake disc to generate a drag torque.

[0071] The fixed position of the friction plate is between the absolute zero position and the target contact position, and is affected by the size of the piston and the friction plate, the space between the friction plate and the piston, etc. The friction plate is set at one of the positions to achieve a space between the friction plate and the piston. In the braking state, the friction plate gradually clamps the brake disc under the thrust of the piston. When the braking state is canceled, the piston quickly returns to its original position. After no longer under the pressure of the piston, the friction plate returns to its fixed position under the action of the spring.

[0072] In a possible embodiment, when the friction plate is in a fixed position, the distance between the friction plate and the brake disc is smaller than the distance between the piston and the friction plate.

[0073] When determining the fixed position of the friction plate in the fixable interval, if the distance between the friction plate and the brake disc is smaller than the distance between the piston and the friction plate, in the braking state, the external motor first drives the piston to move toward the fixed position of the friction plate. When the piston reaches the fixed position of the friction plate, compared with the situation in which the piston and the friction plate are fixedly connected in the prior art, the piston can move faster in the slide groove of the brake caliper, approach the friction plate faster, and when it contacts the friction plate, push the friction plate to clamp the brake disc faster. If the distance between the friction plate and the brake disc is smaller, the friction plate obtains the thrust of the piston and can approach and clamp the brake disc after a shorter distance.

[0074] When the braking state is cancelled, compared with the fixedly connected piston and friction plate, the external motor only drives the piston, and the piston can move away from the friction plate faster. At the same time, the friction plate is no longer subjected to the thrust of the piston. Since the distance between the friction plate and the brake disc is small, the friction plate can quickly return to the fixed position.

[0075] Therefore, setting the distance between the friction plate and the brake disc smaller than the distance between the piston and the friction plate allows the friction plate to approach or move away from the brake disc faster. This can achieve the goal of quickly pushing the friction plate to clamp the brake disc in the braking state, and quickly canceling the clamping of the friction plate on the brake disc in the braking state, making the vehicle's braking and canceling of braking more sensitive and enhancing the driving experience.

[0076] The present application further discloses a brake caliper configuration device, comprising:

[0077] An acquisition module, used for acquiring an absolute zero position of the brake caliper, where the absolute zero position is a position where the distance between the piston of the brake caliper and the brake disc is the farthest;

[0078] A starting module, used for starting the braking state, using a piston to push the friction plate to clamp the brake disc;

[0079] a confirmation module, configured to confirm a target contact position between the friction plate and the brake disc, wherein the clamping effect of the friction plate on the brake disc reaches a target threshold value at the target contact position;

[0080] The setting module is used to set the fixed position of the friction plate in a non-braking state between the absolute zero position and the target contact.

[0081] In a possible embodiment, the confirmation module is specifically used to:

[0082] Acquiring working parameters of an external motor, wherein the external motor is used to control the movement of the piston;

[0083] According to the variation curve of the working parameter and the clamping effect of the friction plate on the brake disc, confirming the displacement value of the piston movement;

[0084] The target contact position between the friction plate and the brake disc is determined using the displacement value.

[0085] In a possible embodiment, in a non-braking state, when the friction plate is in the fixed position, a distance between the friction plate and the brake disc is smaller than a distance between the piston and the friction plate.

[0086] Based on this understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, USB flash drive, mobile hard disk, etc.), including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods of various implementation scenarios of the present application.

[0087] Based on the above Figure 3 The method shown, in order to achieve the above purpose, the embodiment of the present application also provides an electronic device, which can be configured on the vehicle (such as a new energy vehicle) side, the device includes at least one processor, and a memory connected to the at least one processor in communication; the memory is used to store instructions that can be executed by at least one processor, the instructions are executed by at least one processor, and the processor is used to execute a computer program to implement the above as Figure 3 The method shown.

[0088] Optionally, the above-mentioned physical device may also include a user interface, a network interface, a camera, a radio frequency (RF) circuit, a sensor, an audio circuit, a WI-FI module, etc. The user interface may include a display, an input unit such as a keyboard, etc., and the optional user interface may also include a USB interface, a card reader interface, etc. The network interface may optionally include a standard wired interface, a wireless interface (such as a WI-FI interface), etc.

[0089] Those skilled in the art will appreciate that the above-mentioned physical device structure provided in this embodiment does not constitute a limitation on the physical device, and may include more or fewer components, or a combination of certain components, or different arrangements of components.

[0090] Based on the above Figure 3 The method shown, the embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method corresponding to any embodiment is implemented. The storage medium may also include an operating system and a network communication module. The operating system is a program that manages the hardware and software resources of the above-mentioned entity device, and supports the operation of information processing programs and other software and / or programs. The network communication module is used to realize communication between the components inside the storage medium, and communication with other hardware and software in the information processing entity device.

[0091] Based on the above electronic device, the embodiment of the present application further provides a vehicle, which may include: Figure 1 The brake caliper shown. The vehicle can be a new energy vehicle or a traditional vehicle.

[0092] Through the description of the above implementation modes, the technicians in this field can clearly understand that the present application can be implemented by means of software plus necessary general hardware platforms, or by hardware. By applying the scheme of this embodiment, a brake caliper is provided, including: a caliper body, a piston, a screw and a friction plate; a piston is slidably arranged in the slide groove of the caliper body; a screw fixed along the axial direction is arranged correspondingly in the first end direction of the piston; a nut is arranged in the thread on the screw, the nut is slidably arranged in the slide groove of the caliper body, and the nut is fixedly connected to the piston; a friction plate is arranged in the groove of the brake caliper, the friction plate is arranged correspondingly at the second end of the piston and there is a space gap between the piston, there is a gap between the friction plates for accommodating the brake disc, and the friction plate is used to clamp the brake disc under the thrust of the piston in the braking state of the vehicle. In the technical scheme of this embodiment, a space gap is set between the friction plate and the piston. When the vehicle releases the braking effect, the piston and the screw can quickly release the thrust on the friction plate according to the command of the motor, and because there is a space gap between the friction plate and the piston, after the thrust of the piston on the friction plate is released, there is no resistance torque on the brake disc. The brake caliper of the present application can, when the braking state is released, on the basis of quickly releasing the thrust of the piston on the friction plate, the friction plate can also quickly loosen the clamping state of the brake disc, quickly reducing the drag torque of the friction plate on the brake disc, thereby reducing the wear of the friction plate and ensuring the safety of vehicle driving.

[0093] It should be noted that, in this article, relational terms such as "first" and "second" 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 these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0094] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features applied for herein.

Claims

1. A brake caliper, It is characterized in that include: Caliper body, piston, nut, screw and friction plate; A piston is slidably arranged in the slide groove of the caliper body; A screw that rotates in the axial direction is correspondingly arranged in the direction of the first end of the piston; A nut is provided in cooperation with the thread on the screw rod, the nut is slidably arranged in the slide groove of the caliper body, and the nut is fixedly connected to the piston; A friction plate is arranged in the groove of the brake caliper. The friction plate is arranged correspondingly at the second end of the piston and has a space gap between the friction plate and the piston when the vehicle is not braked. There is a gap between the friction plates for accommodating the brake disc. When the vehicle is braked, the friction plate is used to clamp the brake disc under the thrust of the piston.

2. The brake caliper according to claim 1, It is characterized in that The brake caliper further includes: a clamping portion; The clamping portion is used to clamp the friction plate so that the friction plate is located at a fixed position when the brake caliper is in an unbraking state.

3. The brake caliper according to claim 2, It is characterized in that The fixed position is set between the absolute zero position of the piston and the target contact position, the absolute zero position is the position where the piston of the brake caliper is farthest from the brake disc, and the target contact position is the position when the piston pushes the friction plate to contact the brake disc.

4. The brake caliper according to claim 2, It is characterized in that The clamping portion further includes: a spring; The spring is connected to the friction plate, and is used for controlling the friction plate to return to the fixed position when the friction plate is not acted upon by the thrust of the piston.

5. A method for configuring a brake caliper, It is characterized in that include: Obtaining an absolute zero position of the brake caliper, where the absolute zero position is the position where the piston of the brake caliper is farthest from the brake disc; Start the braking state, and use the piston to push the friction plate to clamp the brake disc; confirming a target contact position between the friction plate and the brake disc, at which the clamping effect of the friction plate on the brake disc reaches a target threshold; Between the absolute zero position and the target contact position, a fixed position of the friction plate in a non-braking state is set.

6. The method according to claim 5, It is characterized in that The step of confirming the target contact position between the friction plate and the brake disc comprises: Acquiring working parameters of an external motor, wherein the external motor is used to control the displacement of the piston; confirming the displacement value of the piston according to the variation curve of the working parameter and the clamping effect of the friction plate on the brake disc; The target contact position between the friction plate and the brake disc is determined using the displacement value.

7. The method according to claim 5, It is characterized in that In a non-braking state, when the friction plate is in the fixed position, the distance between the friction plate and the brake disc is smaller than the distance between the piston and the friction plate.

8. A brake caliper configuration device, It is characterized in that include: An acquisition module, used for acquiring an absolute zero position of the brake caliper, where the absolute zero position is a position where the distance between the piston of the brake caliper and the brake disc is the farthest; A starting module, used for starting the braking state, using a piston to push the friction plate to clamp the brake disc; a confirmation module, configured to confirm a target contact position between the friction plate and the brake disc, wherein the clamping effect of the friction plate on the brake disc reaches a target threshold value at the target contact position; The setting module is used to set the fixed position of the friction plate in a non-braking state by using the difference between the absolute zero position and the target contact position.

9. An electronic device, It is characterized in that include: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 5 to 7.

10. A computer-readable storage medium having a computer program stored thereon, It is characterized in that When the computer program is executed by a processor, the method according to any one of claims 5 to 7 is implemented.

11. A vehicle, It is characterized in that The vehicle is equipped with the brake caliper according to claim 1 .

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