CN220600421U - Locking device of caliper motor and vehicle - Google Patents

Abstract

The utility model discloses a locking device of a caliper motor and a vehicle, wherein the locking device comprises the following components: the driven locking piece is arranged on a motor transmission shaft of the caliper motor; the driving locking piece is movably arranged on the caliper body of the caliper motor and is movable relative to the driven locking piece; and the driving structure is used for driving the driving locking piece to move relative to the driven locking piece so as to selectively lock the driven locking piece. According to the locking device of the caliper motor, the motor transmission shaft of the caliper motor is locked through the locking device, so that the motor transmission shaft of the caliper motor can keep a stable locking state after parking operation, reverse rotation of the motor transmission shaft is avoided, and reliability of the caliper motor on vehicle braking is guaranteed.

Description

Locking device of caliper motor and vehicle

Technical Field

The utility model relates to the technical field of vehicle braking, in particular to a locking device of a caliper motor and a vehicle with the locking device.

Background

The caliper motor of the EMB (Electro Mechanical Brake; electromechanical brake) system plays a vital role in the whole EMB system as a device capable of realizing service braking and parking braking, wherein the EMB transmits a brake pedal signal acquired by a pedal simulator and a pedal stroke sensor to an ECU (Electronic Control Unit; electronic control unit), transmits the brake pedal signal to a caliper motor MCU (Microcontroller Unit; micro control unit) through ECU processing, and realizes service braking of a vehicle through torque output of the caliper motor. The EMB system calculates the sliding force generated by gravity when the vehicle parks on the slope through acceleration signals acquired by the ECU from the longitudinal acceleration sensor, and the ECU applies braking force to the rear wheels through the caliper motor to keep the vehicle parked on the slope. In the related art, the stability of the EMB caliper motor is limited during braking, the problem of reverse rotation of a motor transmission shaft of the caliper motor is easy to occur, and the situation of poor braking effect exists.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the locking device of the caliper motor, which can lock the motor transmission shaft when the caliper motor brakes, improve the stability of braking of the caliper motor and ensure the braking effect on a vehicle.

According to an embodiment of the utility model, a locking device of a caliper motor comprises: the driven locking piece is arranged on a motor transmission shaft of the caliper motor; the driving locking piece is movably arranged on the caliper body of the caliper motor and is movable relative to the driven locking piece; and the driving structure is used for driving the driving locking piece to move relative to the driven locking piece so as to selectively lock the driven locking piece.

According to the locking device of the caliper motor, disclosed by the embodiment of the utility model, the motor transmission shaft of the caliper motor is locked through the locking device, so that the motor transmission shaft of the caliper motor can keep a stable locking state after parking operation, the motor transmission shaft is prevented from reversing, and the reliability of the caliper motor on vehicle braking is ensured.

According to the locking device of the caliper motor, according to some embodiments of the utility model, the driven locking piece is configured as a ratchet wheel, the ratchet wheel is fixedly sleeved outside the motor transmission shaft, at least two locking teeth are arranged on the peripheral wall of the ratchet wheel, and a locking groove is defined between the two locking teeth; the active locking piece is constructed as a pawl, the pawl is rotatably installed on the clamp body through a connecting shaft, the pawl is provided with a locking protrusion, and the locking protrusion is suitable for being locked in the locking groove.

According to the locking device of the caliper motor, according to some embodiments of the utility model, the axis of the ratchet wheel is spaced apart from the axis of the connecting shaft in parallel, and the locking protrusions are spaced apart from the axis of the connecting shaft.

According to the locking device of the caliper motor, the locking protrusion is arranged on one side, facing the ratchet wheel, of the pawl, a pushing surface is arranged on one side, facing away from the ratchet wheel, of the pawl, and the output end of the driving structure is suitable for being pressed against the pushing surface after power is output.

The locking device of the caliper motor according to some embodiments of the present utility model further comprises an elastic restoring member connected between the caliper body and the pawl and configured to apply an elastic force to the pawl away from the ratchet.

According to the locking device of the caliper motor, the driving structure comprises a driving piece and a pushing piece, the driving piece is connected with the pushing piece, and the driving piece drives the pushing piece to push the driving locking piece to move towards the driven locking piece when power is output.

According to the locking device of the caliper motor, the pushing piece is configured as a push rod, the push rod is movably arranged on the caliper body, one end of the push rod is connected with the driving piece, and the other end of the push rod is pressed against the active locking piece.

The locking device of the caliper motor according to some embodiments of the present utility model further comprises a control module electrically connected to the driving member and adapted to control the driving member to be electrically connected after receiving the parking signal.

According to some embodiments of the utility model, the driving member is configured as an electromagnetic driving member, which is in power connection with the pushing member, and which is adapted to drive the pushing member to move when energized.

The utility model further provides a vehicle.

According to an embodiment of the present utility model, a vehicle is provided with the locking device of the caliper motor according to any one of the above embodiments.

The vehicle and the locking device of the caliper motor have the same advantages compared with the prior art, and are not described in detail herein.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic structural view of a locking device of a caliper motor according to an embodiment of the present utility model;

reference numerals:

the locking device 100 is provided with a locking means,

the electromagnetic drive member 1, the push rod 2, the pawl 3, the locking protrusion 31, the pushing surface 32, the connecting shaft 4, the ratchet wheel 5, the locking tooth 51 and the locking groove 52.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

A locking device 100 for a caliper motor according to an embodiment of the present utility model will be described with reference to fig. 1, and the locking device 100 can lock a motor drive shaft when the caliper motor brakes, so as to ensure the braking reliability of the caliper motor and realize automatic parking. The locking device 100 of the present utility model is used for locking a caliper motor of a vehicle, and the caliper motor plays a critical role in the whole EMB system as a device capable of realizing service braking and parking braking. The EMB (Electro Mechanical Brake; electromechanical brake) system collects brake pedal signals through a pedal simulator and a pedal stroke sensor, transmits the brake pedal signals to an ECU (Electronic Control Unit; electronic control unit), transmits the brake pedal signals to a caliper motor MCU (Microcontroller Unit; micro control unit) through ECU processing, and achieves service braking of the vehicle through torque output of the caliper motor.

As shown in fig. 1, a locking device 100 of a caliper motor according to an embodiment of the present utility model includes: the driving locking piece, the driven locking piece and the driving structure.

The output end of the driving structure can act on the active locking piece, for example, the driving structure and the active locking piece can be directly connected and fixed, or the driving structure and the active locking piece are in pressing contact, so that the driving structure can drive the active locking piece to move when power is output.

The driven locking piece is arranged on a motor transmission shaft of the caliper motor, and can be relatively fixed with the motor transmission shaft, so that the driven locking piece can rotate along with the motor transmission shaft. In other words, the driven locking piece can rotate along with the motor transmission shaft in the process of the rotation of the motor transmission shaft, and can also play a locking role on the motor transmission shaft when the driven locking piece is locked, so that the caliper motor is not rotated any more, the motor transmission shaft is prevented from reversing, the locking effect of the caliper motor on wheels is ensured, and the braking effect of a vehicle is realized.

The driving locking piece is movably arranged on the caliper body of the caliper motor and is movable relative to the driven locking piece, and the driving structure is used for driving the driving locking piece to move relative to the driven locking piece so as to selectively lock the driven locking piece, so that when the caliper motor is in actual use, a user inputs a parking instruction or action when the user has the parking requirement, and after the locking device 100 receives a parking signal, the driving structure can be used for outputting power to drive the driving locking piece to move towards the driven locking piece and realize locking.

According to the locking device 100 of the caliper motor, the motor transmission shaft of the caliper motor is locked through the locking device 100, so that the motor transmission shaft of the caliper motor can keep a stable locking state after parking operation, reverse rotation of the motor transmission shaft is avoided, and reliability of parking of the caliper motor on a vehicle is guaranteed.

In some embodiments, the driven locking member is configured as a ratchet wheel 5, the ratchet wheel 5 is fixedly sleeved outside the motor transmission shaft, the outer peripheral wall of the ratchet wheel 5 is provided with at least two locking teeth 51, and a locking groove 52 is defined between the two locking teeth 51. That is, in practical design, the ratchet wheel 5 may be fixedly sleeved outside the motor transmission shaft, so that the ratchet wheel 5 and the motor transmission shaft are circumferentially fixed, and the ratchet wheel 5 is driven to rotate when the motor transmission shaft rotates, and the motor transmission shaft is locked when the ratchet wheel 5 is locked by Xiang Suo. Specifically, the inner peripheral wall of the ratchet wheel 5 can be matched with the outer peripheral wall of the motor transmission shaft through a key groove to perform circumferential limiting.

As shown in fig. 1, the plurality of locking teeth 51 are provided, the plurality of locking teeth 51 are sequentially distributed in the circumferential direction of the ratchet wheel 5, and a locking groove 52 is formed between two adjacent locking teeth 51.

The active locking member is configured as a pawl 3, the pawl 3 being rotatably mounted to the jaw body via a connecting shaft 4 such that the pawl 3 is rotatable about the connecting shaft 4 relative to the jaw body. As shown in fig. 1, the lower end of the pawl 3 is connected to the caliper body through a connection shaft 4 so that the upper end of the pawl 3 can rotate relative to the caliper body, wherein the ratchet wheel 5 is located at one side of the pawl 3 so that the pawl 3 can gradually approach or separate from the ratchet wheel 5 during rotation about the connection shaft 4.

And, the pawl 3 is provided with a locking protrusion 31, the locking protrusion 31 is suitable for being locked in the locking groove 52, and the locking protrusion 31 is arranged on one side of the pawl 3 close to the ratchet wheel 5 in a protruding way, so that when the driving structure drives the pawl 3 to move towards the ratchet wheel 5, the locking protrusion 31 can extend into the locking groove 52 to realize the abutting and pressing fit with the locking teeth 51, and further plays a limiting role on the locking teeth 51 and the ratchet wheel 5.

It should be noted that, as shown in fig. 1, the locking teeth 51 are protruding outwards in the radial direction of the ratchet wheel 5, and incline along the circumferential direction of the ratchet wheel 5, and the inclination directions of the plurality of locking teeth 51 in the circumferential direction of the ratchet wheel 5 are the same, as shown in fig. 1, after the locking protrusions 31 extend into the locking grooves 52, the locking protrusions 31 can play a role in limiting the ratchet wheel 5 anticlockwise, preventing the ratchet wheel 5 and the motor transmission shaft from rotating anticlockwise, and further ensuring the locking stability of the caliper motor.

In some embodiments, the axis of the ratchet wheel 5 is spaced parallel to the axis of the connecting shaft 4, and the locking projections 31 are spaced apart from the axis of the connecting shaft 4. As shown in fig. 1, the axis of the ratchet wheel 5 is located on the right side of the axis of the connection shaft 4, and the locking protrusion 31 of the pawl 3 is spaced apart from the axis of the ratchet wheel 5 above the axis of the connection shaft 4, whereby the locking protrusion 31 can gradually approach the locking groove 52 of the ratchet wheel 5 as it moves around the connection shaft 4, locking of the ratchet wheel 5 is achieved, and thus, the design of the locking device 100 can be made more reasonable.

In some embodiments, the locking protrusion 31 is disposed on a side of the pawl 3 facing the ratchet wheel 5, a pushing surface 32 is disposed on a side of the pawl 3 facing away from the ratchet wheel 5, and the output end of the driving structure is pressed against the pushing surface 32, in other words, the output end of the driving structure and the ratchet wheel 5 are respectively disposed on two sides of the pawl 3, so that the output end of the driving structure can push the pawl 3 to move toward the ratchet wheel 5.

As shown in fig. 1, the bottom of the pawl 3 is rotatably connected to the pliers body through the connecting shaft 4, the driving structure is located at the left side of the pawl 3, the ratchet wheel 5 is located at the right side of the pawl 3, at least part of the left side of the pawl 3 is configured as a pushing surface 32, the pushing surface 32 can be configured as a plane, so that the output end of the driving structure directly contacts with the pushing surface 32 in a contact manner, and when the driving structure outputs power, the pawl 3 can be pushed to move towards the right at the pushing surface 32 to gradually contact with the pawl 3, thereby realizing locking of a motor transmission shaft.

In some embodiments, the locking device 100 of the caliper motor further includes an elastic restoring member connected between the caliper body and the pawl 3 and configured to apply an elastic force to the pawl 3 away from the ratchet wheel 5, where the elastic restoring member may be configured as a torsion spring, and the torsion spring is sleeved outside the connecting shaft 4, and one end of the torsion spring is pressed against the caliper body, and the other end is pressed against the pawl 3, so as to apply a force toward the pawl 3.

As shown in fig. 1, the elastic restoring member is sleeved outside the connecting shaft 4, and the elastic restoring member can apply an elastic pretightening force rotating leftwards to the pawl 3, so that the pawl 3 can automatically move leftwards away from the ratchet wheel 5 when not acted by the acting force of the driving structure, and the pawl 3 and the ratchet wheel 5 are in an unlocked state in a normal state.

In some embodiments, the driving structure includes a driving member and a pushing member, where the driving member is connected to the pushing member, and when the driving member is energized, the driving member drives the driving locking member to move toward the driven locking member, where an output end of the driving member may be fixedly connected to the pushing member, so that the driving member may drive the pushing member to move, or the output end of the driving member may also be in contact with the pushing member, and may also push the pushing member to move relative to the ratchet wheel 5 and the pawl 3.

Further, in practical design, the pushing member may be configured as a push rod 2, as shown in fig. 1, where the push rod 2 is a straight rod, and the push rod 2 may be movably installed on the pliers body, for example, the push rod 2 may move in a left-right direction in fig. 1, and the left-right direction may refer to a transverse direction, where one end of the push rod 2 is connected to the driving member, and the other end of the push rod 2 abuts against the active locking member.

Specifically, as shown in fig. 1, the left end of the push rod 2 is connected to the driving member, and the right end of the push rod 2 may be disposed directly opposite to the pushing surface 32 of the pawl 3. Thus, when the driving member drives the push rod 2 to move, the push rod 2 moves from left to right in the transverse direction, so that the upper end of the pawl 3 is pushed to move right around the connecting shaft 4, and locking of the ratchet wheel 5 is achieved.

Wherein, driving piece and impeller are all installed in the same side of the pincers body, do benefit to like this, do benefit to the interval of reducing between driving piece and the impeller for the driving piece when carrying out power take off, can promote the impeller effectively and move for the pincers body, do benefit to the space occupation of reducing locking device 100 on the pincers body, it is more convenient to install.

In some embodiments, the driving member is configured as an electromagnetic driving member 1, such as the electromagnetic driving member 1 is in particular an electromagnet or a solenoid valve, the electromagnetic driving member 1 being in power connection with the pushing member, the electromagnetic driving member 1 being adapted to drive the pushing member in motion when energized. That is, the locking device 100 of the present utility model may adopt electromagnetic driving, and the pushing member may be configured as an electromagnet push rod, that is, when the parking brake is required to be performed on the vehicle, the electromagnetic driving member 1 may be powered on, so that the coil in the electromagnetic driving member 1 is powered on to generate magnetic induction phenomenon, so that the electromagnet push rod moves transversely under the magnetic force of the electromagnetic driving member 1, and further effective driving of the pawl 3 is achieved.

In some embodiments, the locking device 100 of the caliper motor further comprises a control module electrically connected to the driving member and adapted to control the driving member to be electrically conductive after receiving the parking signal. The control module can be electrically connected with the vehicle controller, so that the control module can receive a parking signal of the vehicle controller.

When a user performs parking braking on a vehicle, the vehicle state information is estimated through a switch signal, wheel speed information and a motor angle sensor of the electronic parking braking system, corresponding current (calibration value) is requested to a current output module, a motor actuator is controlled by the current output module to complete parking, meanwhile, a control module receives the parking signal and electrifies an electromagnetic driving piece 1, so that the electromagnetic driving piece 1 generates magnetic force, a push rod 2 is pushed to perform transverse movement, the push rod 2 further pushes a pawl 3 to rotate, finally the pawl 3 and a ratchet wheel 5 are locked, coaxial fixation of a motor transmission shaft and the ratchet wheel 5 is realized, the locking function of parking is realized, and the stability of the parking state is ensured.

Wherein, in the concrete implementation process:

step 1: the user sends a parking signal/the vehicle is in a static environment, and the brake caliper is automatically locked;

step 2: the controller receives a parking switch signal, a vehicle speed signal, a wheel speed signal and a motor angle sensor signal and sends a parking locking signal to the electromagnetic driving piece 1;

step 3: when the electromagnetic driving piece 1 receives a parking locking signal, the coil of the electromagnetic driving piece 1 is electrified with current to generate magnetic induction;

step 4: the push rod 2 moves transversely under the magnetic force of the electromagnetic driving piece 1 to push the pawl 3 to do yaw motion around the connecting shaft 4;

step 5: the pawl 3 locks the ratchet wheel 5 under the action of the electromagnet, so that the ratchet wheel 5 cannot rotate, the caliper motor cannot rotate at the moment, the caliper motor is locked, and the vehicle achieves the parking locking function.

Thus, by providing the locking device 100, effective locking of the caliper motor can be achieved during parking, and safety and reliability of parking can be ensured.

The utility model further provides a vehicle.

According to the vehicle provided with the locking device 100 of the caliper motor of any one of the embodiments, the locking device 100 can ensure that the caliper motor is more stable when parking braking, the vehicle automation is improved, and the driving feeling of a user is improved.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A locking device for a caliper motor, comprising:

the driven locking piece is arranged on a motor transmission shaft of the caliper motor;

the driving locking piece is movably arranged on the caliper body of the caliper motor and is movable relative to the driven locking piece;

and the driving structure is used for driving the driving locking piece to move relative to the driven locking piece so as to selectively lock the driven locking piece.

2. The locking device of a caliper motor according to claim 1, wherein the driven locking member is configured as a ratchet wheel, the ratchet wheel is fixedly sleeved outside the motor transmission shaft, at least two locking teeth are arranged on the peripheral wall of the ratchet wheel, and a locking groove is defined between the two locking teeth;

the active locking piece is constructed as a pawl, the pawl is rotatably installed on the clamp body through a connecting shaft, the pawl is provided with a locking protrusion, and the locking protrusion is suitable for being locked in the locking groove.

3. The locking device of a caliper motor according to claim 2, wherein the axis of the ratchet is spaced apart in parallel with the axis of the connecting shaft, and the locking protrusions are spaced apart from the axis of the connecting shaft.

4. The locking device of a caliper motor according to claim 2, wherein the locking protrusion is provided on a side of the pawl facing the ratchet wheel, a pushing surface is provided on a side of the pawl facing away from the ratchet wheel, and the output end of the driving structure is adapted to be pressed against the pushing surface after power is output.

5. The locking device of a caliper motor according to claim 2, further comprising an elastic restoring member connected between said caliper body and said pawl and adapted to apply an elastic force to said pawl away from said ratchet wheel.

6. The locking device of a caliper motor according to claim 1, wherein the driving structure includes a driving member and a pushing member, the driving member being connected to the pushing member, the driving member driving the pushing member to push the driving locking member toward the driven locking member when outputting power.

7. The locking device of a caliper motor according to claim 6, wherein the pushing member is configured as a push rod movably mounted to the caliper body, one end of the push rod being connected to the driving member and the other end being pressed against the active locking member.

8. The caliper motor locking device of claim 6, further comprising a control module electrically connected to the driver and adapted to control the driver to conduct after receiving a park signal.

9. The locking device of a caliper motor according to claim 6, wherein said driving member is configured as an electromagnetic driving member, said electromagnetic driving member being in power connection with said pushing member, said electromagnetic driving member being adapted to drive said pushing member in motion when energized.

10. A vehicle, characterized in that a locking device of a caliper electric machine according to any one of claims 1-9 is provided.