Parking brake device and electromechanical brake system

Abstract

This application relates to the field of vehicle braking control technology, and discloses a parking brake device and an electromechanical braking system. The parking brake device includes: a housing, a locking member, and a latching member. The locking member is disposed within the housing and is connected to the output shaft of a motor. The locking member has a locking portion. The latching member is rotatably disposed within the housing and has a latching portion and a supporting portion. When the latching member rotates relative to the locking member to the locked position, the latching portion engages with the locking portion for limitation, and the supporting portion abuts against the inner wall of the housing. Therefore, since the locking member is connected to the motor output shaft, the parking force during parking can be provided by the motor output shaft, which helps to save costs. Simultaneously, when the latching member is in the locked position, the supporting portion of the latching member also abuts against the inner wall of the housing, thus transferring part of the parking reaction force to the housing and preventing the rotating bearing of the latching member from being subjected to the full reaction force, which could lead to jamming or failure. This improves the safety performance of the parking brake device.

Description

Technical Field

[0001] This application relates to the field of vehicle braking control technology, and in particular to a parking brake device and an electromechanical braking system. Background Technology

[0002] With the rapid development of automotive braking systems, brake-by-wire technology has been widely used. In existing technologies, brake-by-wire is divided into two types: electromechanical brake-by-wire (EMB) and electrohydraulic brake-by-wire (EHB).

[0003] Among them, EMB provides braking force to the wheel end through the wheel-side motor. Compared with the previous electronic parking system, EMB has higher requirements for space and safety. However, the electromechanical caliper parking mechanism in EMB generally relies on the rotating shaft of the caliper to bear the parking reverse force. During operation, the rotating shaft may jam or fail, which may lead to parking brake failure and cause risks. Utility Model Content

[0004] This application provides a parking brake device and an electromechanical braking system. When the latching member is in the locked position, the supporting part of the latching member also abuts against the inner wall of the housing. This can transfer part of the parking reaction force to the housing, preventing the rotating bearing of the latching member from being subjected to the full reaction force and causing jamming or failure, which is beneficial to improving the safety performance of the parking brake device.

[0005] To achieve the above objectives, the main technical solutions adopted in this application include:

[0006] In a first aspect, embodiments of this application provide a parking brake device for an electromechanical braking system, comprising:

[0007] case;

[0008] A locking element is located inside the housing and is connected to the motor output shaft. The locking element has a locking part.

[0009] The snap-fit ​​component is rotatably disposed within the housing. The snap-fit ​​component has a snap-fit ​​portion and a support portion. When the snap-fit ​​component rotates relative to the locking component to the locking position, the snap-fit ​​portion engages with the locking portion to limit the movement, and the support portion abuts against the inner wall of the housing.

[0010] According to the parking brake device proposed in the embodiments of this application, when the latching member in the parking brake device rotates to the locked position relative to the locking member, the latching part in the latching member is latched and fixed with the locking part of the locking member. Since the locking member is connected to the motor output shaft, the parking force is provided by the motor output shaft when parking. This arrangement not only makes full use of the parking force of the motor output shaft, but also helps to save costs. At the same time, when the latching member is in the locked position, the supporting part of the latching member also abuts against the inner wall of the housing. This can transfer part of the parking reaction force to the housing, preventing the rotating bearing of the latching member from being subjected to the full reaction force and causing jamming or failure, which helps to improve the safety performance of the parking brake device.

[0011] Optionally, the parking brake device further includes: an elastic element disposed within the housing, and the elastic element is fixedly connected between the latching member and the housing. When the motor output shaft drives the locking member to rotate so that the locking part stops latching and limiting the latching part, the elastic element is adapted to drive the latching member to rotate relative to the locking member from the locked position to the released position.

[0012] Optionally, the parking brake device further includes a drive assembly, which is disposed in the housing and is used to drive the latch to rotate to the locked position.

[0013] Optionally, the drive assembly includes a drive member and a transmission member. The latching member also has a transmission part, which is drively connected between the drive member and the transmission part. The drive member drives the transmission member to rotate the latching member to the locking position.

[0014] Optionally, the housing has a mounting hole, the transmission component passes through the mounting hole, and the driving component is adapted to drive the transmission component to move axially along the mounting hole;

[0015] The transmission component has a driving inclined surface, which can slide relative to the transmission part. When the driving inclined surface moves relative to the transmission part along the axial direction of the mounting hole, the driving inclined surface drives the locking member to rotate to the locked position through the transmission part.

[0016] Optionally, the drive unit is constructed as a drive motor or an electromagnetic drive module.

[0017] Optionally, the locking element is constructed as a ratchet, and the outer periphery of the ratchet is provided with a continuous toothed locking portion;

[0018] The locking part is constructed as a pawl, which forms a one-sided self-locking when it falls into the toothed locking part.

[0019] Alternatively, the elastic element may be constructed as a spring.

[0020] Optionally, the parking brake device further includes: a rotating shaft, which is located inside the housing, and a snap-fit ​​component having a rotating hole, which is rotatably fitted with the rotating shaft through the rotating hole.

[0021] Secondly, embodiments of this application provide an electromechanical braking system, including the parking brake device in the first aspect embodiment.

[0022] According to the electromechanical braking system proposed in the embodiments of this application, by providing the above-mentioned parking brake device, when the latching member in the parking brake device rotates to the locked position relative to the locking member, the latching part in the latching member is latched and fixed with the locking part of the locking member. Since the locking member is connected to the motor output shaft, the parking force during parking is provided by the motor output shaft. This arrangement not only makes full use of the parking force of the motor output shaft, but also helps to save costs. At the same time, when the latching member is in the locked position, the supporting part of the latching member also abuts against the inner wall of the housing. This can transfer part of the parking reaction force to the housing, preventing the rotating bearing of the latching member from being subjected to the full reaction force, which would cause jamming or failure, thus improving the safety performance of the parking brake device. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 A perspective view of the locking member in a parking brake device provided in one embodiment of this application, in the locked position;

[0025] Figure 2 A perspective view of the locking member in the released position in a parking brake device provided in one embodiment of this application;

[0026] Figure 3 A perspective view of a parking brake device provided in another embodiment of this application;

[0027] Figure 4 An assembly drawing of the housing, snap-fit ​​member, and rotating shaft provided for one embodiment of this application;

[0028] Figure 5 This is a perspective view of a snap-fit ​​connector provided in one embodiment of this application.

[0029] [Explanation of Labels in the Attached Images]

[0030] Parking brake device 100;

[0031] Housing 1; Mounting hole 11;

[0032] Locking component 2; Locking part 21;

[0033] 3; 31; 32; 33; 34; 35;

[0034] Motor output shaft 4;

[0035] Elastic element 5;

[0036] Drive component 61; Transmission component 62; Drive inclined surface 621;

[0037] Rotating shaft 7. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0040] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0043] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0044] It should be noted that with the rapid development of automotive braking systems, brake-by-wire technology has been widely used. In existing technologies, brake-by-wire is divided into two types: electromechanical brake-by-wire (EMB) and electrohydraulic brake-by-wire (EHB).

[0045] Among them, EMB provides braking force to the wheel end through the wheel-side motor. Compared with the previous electronic parking system, EMB has higher requirements for space and safety. However, the electromechanical caliper parking mechanism in EMB generally relies on the rotating shaft of the caliper to bear the parking reverse force. During operation, the rotating shaft may jam or fail, which may lead to parking brake failure and cause risks.

[0046] Based on this, this application proposes a parking brake device 100. When the latching member 3 in the parking brake device 100 rotates to the locked position relative to the locking member 2, the latching part 31 in the latching member 3 is latched and fixed with the locking part 21 of the locking member 2. Since the locking member 2 is connected to the motor output shaft 4, the parking force is provided by the motor output shaft 4. This arrangement not only makes full use of the parking force of the motor output shaft 4, but also helps to save costs. At the same time, when the latching member 3 is in the locked position, the support part 32 of the latching member 3 also abuts against the inner wall of the housing 1. This can transfer part of the parking reaction force to the housing 1, preventing the rotating shaft 7 of the latching member 3 from bearing all the reaction force and causing jamming or failure, which helps to improve the safety performance of the parking brake device 100.

[0047] The parking brake device 100 and electromechanical braking system proposed in this application are described below with reference to the accompanying drawings.

[0048] like Figures 1-5As shown, the parking brake device 100 according to the first aspect embodiment of this application includes: a housing 1, a locking member 2 and a latching member 3. The locking member 2 is disposed inside the housing 1 and is connected to the motor output shaft 4. The locking member 2 has a locking part 21. The latching member 3 is rotatably disposed inside the housing 1. The latching member 3 has a latching part 31 and a supporting part 32. When the latching member 3 rotates relative to the locking member 2 to the locking position, the latching part 31 latches and limits the locking part 21, and the supporting part 32 abuts against the inner wall of the housing 1.

[0049] Specifically, an installation space is formed within the housing 1, and a locking member 2 is disposed within the installation space. The motor output shaft 4 passes through the housing 1 and extends out of the installation space. The locking member 2 is sleeved on the motor output shaft 4. Furthermore, a snap-fit ​​member 3 is rotatably disposed within the housing 1. The snap-fit ​​member 3 has a snap-fit ​​portion 31. When parking brake operation is required, such as... Figure 1 As shown, the control latch 3 rotates relative to the locking member 2 to the locking position. At this time, the latching part 31 of the latch 3 and the locking part 21 of the locking member 2 are latched and limited. At the same time, the motor output shaft 4 provides parking force to the locking member 2. In this way, under the joint action of the latch 3 and the motor output shaft 4, it is ensured that the locking member 2 will not rotate after being latched, and the output torque of the motor output shaft 4 will not be reduced, thus ultimately realizing the parking brake of the vehicle.

[0050] However, during vehicle parking, the parking reaction force applied by the motor output shaft 4 to the locking member 2 is borne by the rotating shaft 7 of the snap-fit ​​member 3. This can easily lead to risks such as jamming or failure of the rotating shaft 7, which greatly affects the safety performance of the parking brake device 100.

[0051] Based on this, this application also provides a support portion 32 on the snap-fit ​​portion 31 for abutting against the inner wall of the housing 1. The support portion 32 can be constructed as a protruding structure or a columnar structure; no specific limitation is made here. When the snap-fit ​​member 3 rotates relative to the locking member 2 to the locking position, continue to refer to the figure. Figure 1 As shown, the support portion 32 of the latching member 3 also abuts against the inner wall of the housing 1. With this arrangement, while the latching member 3 applies parking brake to the vehicle, the latching member 3 can also apply part of the parking reaction force to the housing 1 through the support portion 32. In other words, the support portion 32 has the function of further restricting the rotation of the locking member 2. This helps to reduce the parking reaction force acting on the rotating shaft 7 of the latching member 3, and avoids the rotating shaft 7 of the latching member 3 bearing all the reaction force, which would lead to jamming or failure. This helps to improve the safety performance of the parking brake device 100.

[0052] In summary, according to the parking brake device 100 proposed in this application embodiment, when the latching member 3 in the parking brake device 100 rotates to the locked position relative to the locking member 2, the latching part 31 in the latching member 3 is latched and fixed with the locking part 21 of the locking member 2. Since the locking member 2 is connected to the motor output shaft 4, the parking force is provided by the motor output shaft 4. This arrangement not only makes full use of the parking force of the motor output shaft 4, but also helps to save costs. At the same time, when the latching member 3 is in the locked position, the support part 32 of the latching member 3 also abuts against the inner wall of the housing 1. This can transfer part of the parking reaction force to the housing 1, preventing the rotating shaft 7 of the latching member 3 from bearing all the reaction force and causing jamming or failure, which helps to improve the safety performance of the parking brake device 100.

[0053] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the parking brake device 100 also includes an elastic element 5, which is disposed inside the housing 1 and is fixedly connected between the latching member 3 and the housing 1. When the motor output shaft 4 drives the locking member 2 to rotate so that the locking part 21 stops latching and limiting the latching part 31, the elastic element 5 is adapted to drive the latching member 3 to rotate relative to the locking member 2 from the locked position to the released position.

[0054] Specifically, one end of the elastic element 5 is fixedly connected to the snap-fit ​​element 3, and the other end is fixedly connected to the inner wall of the housing 1, such as... Figure 2 As shown, assuming the latching member 3 is initially in the released position, when parking brake needs to be applied to the vehicle, the latching member 3 is controlled to rotate relative to the locking member 2 from the released position to the locked position. During this process, the elastic member 5 can be compressed or stretched with the rotation of the latching member 3 to accumulate elastic force. When the latching member 3 rotates relative to the locking member 2 to the locked position, the latching part 31 of the latching member 3 and the locking part 21 of the locking member 2 are engaged and limited, and the support part 32 of the latching member 3 also abuts against the inner wall of the housing 1.

[0055] When a release action is required, the locking member 2 is driven to rotate via the motor output shaft 4, so that the locking part 21 stops engaging and limiting the engagement of the locking part 31. Figure 2 As shown, at this time, the locking member 2 no longer applies torque to the latching member 3. Under the action of the elastic force of the elastic member 5, the latching member 3 returns to the release position, and the rotation of the locking member 2 is no longer restricted.

[0056] This design not only ensures that the disengagement of the parking lock can be controlled by the motor, but also utilizes the elastic element 5 for release and reset, resulting in a simpler structure that saves costs while fulfilling the functional requirements.

[0057] In some embodiments of this application, the parking brake device 100 further includes a drive assembly disposed in the housing 1, which drives the latching member 3 to rotate to the locked position. That is, when parking the vehicle, the drive assembly drives the latching member 3 to rotate to the locked position, thus improving the automation level of the parking brake device 100. Simultaneously, the drive assembly is only used to drive the latching member 3 from the released position to the locked position, while the latching member 3 is used to drive the latching member 3 from the locked position to the released position. This arrangement, through the cooperation of the drive assembly and the elastic member 5, achieves the cyclic movement of the latching member 3, satisfying automation requirements while simplifying the structure and reducing costs.

[0058] In some embodiments of this application, such as Figures 1-3 and Figure 5 As shown, the drive assembly includes a drive member 61 and a transmission member 62. The latching member 3 also has a transmission part 33. The transmission member 62 is connected between the drive member 61 and the transmission part 33. The drive member 61 drives the transmission member 62 to rotate the latching member 3 to the locking position.

[0059] Specifically, the driving component 61 is connected to the transmission part 33 of the latching component 3 via the transmission component 62. The transmission connection methods include, but are not limited to, sliding connection, gear connection, cam connection, and sprocket connection. It can be understood that the transmission component 62 serves both a connecting and transmission function, transmitting the driving force applied by the driving component 61 to the transmission part 33 of the latching component 3, thereby driving the latching component 3 to rotate to the locked position. By providing the transmission component 62 between the driving component 61 and the latching component 3, the driving assembly can be adapted to specific structures and spaces to meet different driving arrangement requirements.

[0060] In some embodiments of this application, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the housing 1 has a mounting hole 11, the transmission member 62 passes through the mounting hole 11, the driving member 61 is adapted to drive the transmission member 62 to move axially along the mounting hole 11, the transmission member 62 has a driving inclined surface 621, the driving inclined surface 621 and the transmission part 33 can slide relative to each other, when the driving inclined surface 621 moves relative to the transmission part 33 along the axial direction of the mounting hole 11, the driving inclined surface 621 drives the locking member 3 to rotate to the locked position through the transmission part 33.

[0061] Specifically, the transmission member 62 passes through the mounting hole 11, and the transmission member 62 can only move linearly along the axial direction of the mounting hole 11. When the vehicle needs to be parked, the drive member 61 drives the transmission member 62 to move along the axial direction of the mounting hole 11 towards the latching member 3. The transmission member 62 has a driving inclined surface 621. When the transmission member 62 moves towards the latching member 3 along the axial direction of the mounting hole 11, the driving inclined surface 621 slides relative to the transmission part 33, and the driving inclined surface 621 is relative to the transmission part 33 along the axial direction of the mounting hole 11. The movement of the inclined plane 621 converts the relative sliding between it and the transmission part 33 into the rotation of the locking member 3, causing the locking member 3 to rotate to the locking position. When the locking member 3 rotates to the locking position relative to the locking member 2, the locking part 31 of the locking member 3 engages and limits the locking part 21 of the locking member 2, and the support part 32 of the locking member 3 also abuts against the inner wall of the housing 1. At this time, the elastic member 5 is compressed or stretched to accumulate elastic force. The locking member 3 ensures that the locking member 2 is locked and will not rotate, thus ensuring that the output torque of the motor output shaft 4 will not decrease.

[0062] After the latching member 3 is rotated to the locked position, the driving member 61 can drive the transmission member 62 to move away from the latching member 3 along the axial direction of the mounting hole 11. At this time, the latching member 3 and the locking member 2 limit each other. Therefore, the latching member 3 will continue to be kept in the locked position due to the action of the locking member 2.

[0063] When a release action is required, the locking member 2 is driven to rotate via the motor output shaft 4, so that the locking part 21 stops engaging and limiting the engagement of the locking part 31. Figure 2 As shown, at this time, the locking member 2 no longer applies torque to the latching member 3. Under the action of the elastic force of the elastic member 5, the latching member 3 returns to the release position, and the rotation of the locking member 2 is no longer restricted.

[0064] With this configuration, after the parking lock action, the drive component 61 drives the transmission component 62 to reset in advance, which can prepare for the parking lock action to disengage, thereby further ensuring that the disengagement of the parking lock action can be controlled by the motor.

[0065] In some embodiments of this application, the drive component 61 is configured as a drive motor or an electromagnetic drive module. That is, the drive component 61 can be configured as a drive motor or an electromagnetic drive module, depending on the actual situation. For example, when the drive component 61 is configured as an electromagnetic drive module, the electromagnetic drive module is located at the bottom of the housing 1, which can save overall layout space. The transmission component 62 can be configured as a magnetic component. When parking brake is required, current is supplied to the electromagnetic drive module, and the electromagnetic drive module drives the transmission component 62 to move so that the latch 3 rotates to the locked position. When release is required, the electromagnetic drive module is de-energized, and the transmission component 62 resets under the action of gravity or spring. The driving method is simple and reliable, and the structure is simple.

[0066] In some embodiments of this application, the locking member 2 is constructed as a ratchet, and the outer periphery of the ratchet is provided with a continuous toothed locking portion. The engaging portion 31 is constructed as a pawl, and when the pawl falls into the toothed locking portion, it forms a one-sided self-locking.

[0067] Specifically, the ratchet is annular with a ratchet positioning hole in the center. The ratchet is press-fitted onto the motor output shaft 4 through the positioning hole. The outer circumference of the ratchet has a continuous toothed locking section. The engaging part 31 is a pawl. When the pawl falls into the toothed locking section, a one-sided self-locking is achieved. When the mechanism begins its one-sided self-locking operation, the toothed locking section of the ratchet is subjected to significant pressure and cannot break. The toothed locking section of the ratchet requires heat treatment to increase its hardness. The combined use of the ratchet and pawl not only achieves limit self-locking, but also, when a release action is needed, controlling the motor output shaft 4 to rotate the ratchet forward by more than one angle of the toothed locking section will stop the engagement and limit of the engaging part 31. The release method is simple and reliable.

[0068] In some embodiments of this application, the elastic element 5 is constructed as a spring. Preferably, the elastic element 5 is a spring. Of course, this is merely an example; the elastic element 5 primarily serves to provide a restoring force to the snap-fit ​​element 3. Other elastic components are also within the scope of protection of this application.

[0069] In some embodiments of this application, the parking brake device 100 further includes a rotating shaft 7, which is disposed within the housing 1. A snap-fit ​​member 3 has a rotating hole 34, and the snap-fit ​​member 3 is rotatably fitted with the rotating shaft 7 through the rotating hole 34. Specifically, the rotating shaft 7 is used to fit into the rotating hole 34 of the snap-fit ​​member 3, thus restricting the snap-fit ​​member 3 to rotate only around the rotating shaft 7, thereby improving the accuracy of the snap-fit ​​member 3 during rotation.

[0070] The electromechanical braking system according to a second aspect of this application includes the parking brake device 100 in the first aspect embodiment.

[0071] According to the electromechanical braking system proposed in the embodiments of this application, by providing the above-mentioned parking brake device 100, when the latching member 3 in the parking brake device 100 rotates to the locking position relative to the locking member 2, the latching part 31 in the latching member 3 is latched and fixed with the locking part 21 of the locking member 2. Since the locking member 2 is connected to the motor output shaft 4, the parking force is provided by the motor output shaft 4. This arrangement not only makes full use of the parking force of the motor output shaft 4, but also helps to save costs. At the same time, when the latching member 3 is in the locking position, the support part 32 of the latching member 3 also abuts against the inner wall of the housing 1. This can transfer part of the parking reaction force to the housing 1, preventing the rotating shaft 7 of the latching member 3 from bearing all the reaction force and causing jamming or failure, which helps to improve the safety performance of the parking brake device 100.

[0072] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0073] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0074] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0075] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A parking brake device, characterized in that, include: Shell (1); A locking member (2) is provided inside the housing (1). The locking member (2) is connected to the motor output shaft (4). The locking member (2) has a locking part (21). The snap-fit ​​member (3) is rotatably disposed inside the housing (1). The snap-fit ​​member (3) has a snap-fit ​​part (31) and a support part (32). When the snap-fit ​​member (3) rotates relative to the locking member (2) to the locking position, the snap-fit ​​part (31) engages with the locking part (21) and is limited, and the support part (32) abuts against the inner wall of the housing (1).

2. The parking brake device according to claim 1, characterized in that, The parking brake device (100) further includes: an elastic element (5) disposed in the housing (1), and the elastic element (5) is fixedly connected between the snap-fit ​​member (3) and the housing (1). When the motor output shaft (4) drives the locking member (2) to rotate so that the locking part (21) stops snapping and limiting the snap-fit ​​member (31), the elastic element (5) is adapted to drive the snap-fit ​​member (3) to rotate relative to the locking member (2) from the locked position to the released position.

3. The parking brake device according to claim 1 or 2, characterized in that, The parking brake device (100) further includes a drive assembly, which is disposed in the housing (1) and is used to drive the snap-fit ​​member (3) to rotate to the locking position.

4. The parking brake device according to claim 3, characterized in that, The drive assembly includes a drive member (61) and a transmission member (62). The snap-fit ​​member (3) also has a transmission part (33). The transmission member (62) is tractively connected between the drive member (61) and the transmission part (33). The drive member (61) drives the transmission member (62) to rotate the snap-fit ​​member (3) to the locking position.

5. A handbrake arrangement according to claim 4, wherein The housing (1) has a mounting hole (11), the transmission member (62) passes through the mounting hole (11), and the driving member (61) is adapted to drive the transmission member (62) to move axially along the mounting hole (11); The transmission member (62) has a driving ramp (621), which can slide relative to the transmission part (33). When the driving ramp (621) moves relative to the transmission part (33) along the axial direction of the mounting hole (11), the driving ramp (621) drives the snap-fit ​​member (3) to rotate to the locking position through the transmission part (33).

6. The parking brake device according to claim 4, characterized in that The drive unit (61) is configured as a drive motor or an electromagnetic drive module.

7. The parking brake device according to claim 1, characterized in that, The locking member (2) is constructed as a ratchet, and the outer periphery of the ratchet is provided with a continuous toothed locking portion; The latching part (31) is constructed as a latching claw, which forms a one-sided self-locking when it falls into the toothed locking part.

8. The parking brake device according to claim 2, characterized in that The elastic element (5) is constructed as a spring.

9. The parking brake device according to claim 1, characterized in that The parking brake device (100) further includes: a rotating shaft (7), which is located inside the housing (1), and the snap-fit ​​member (3) has a rotating hole (34), which is rotatably fitted with the rotating shaft (7) through the rotating hole (34).

10. An electromechanical braking system, characterized in that, Includes a parking brake device (100) according to any one of claims 1-9.

Images