Vehicle door latch
The vehicle door latch integrates power release, ice breaking, and cinching functions using a single actuator and a switch lever with multiple parts, addressing the operational challenges in low temperatures and simplifying the structure and costs.
Patent Information
- Application Number
- PCT/CN2024/134274
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-11-23
- Filing Date
- 2024-11-25
- Publication Date
- 2025-05-30
AI Technical Summary
Existing vehicle door latches with automatic release and cinching functions fail to operate effectively in low temperatures, requiring additional ice-breaking devices that complicate the structure and increase costs.
A vehicle door latch design that integrates a power release device, a cinching device, and an ice-breaking device, utilizing a single actuator and a switch lever with multiple parts to manage the functions of power release, ice breaking, and cinching without interference.
The design allows for efficient operation of power release, ice breaking, and cinching functions using a single actuator, reducing structural complexity and costs while ensuring correct performance of all functions.
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Figure CN2024134274_30052025_PF_FP_ABST
Abstract
Description
VEHICLE DOOR LATCHTechnical Field
[0001] The present application relates to the technical field of latches, and more particularly to a vehicle door latch.Background Art
[0002] A vehicle has multiple side doors for people to get on and off. Side doors of a conventional vehicle are opened and closed manually. With the improvement of vehicle intelligence, a vehicle door latch begins to have more functions. For example, the vehicle door latch can be released automatically without manual unlocking. When the door is being closed to a certain position, the door latch will function, causing the door to be cinched.
[0003] For such door latches with an automatic release and cinching function, if the door is frozen under a low temperature in winter, the door latch will not be released automatically due to the resistance in the automatic release process. In order to solve this problem, an ice-breaking device needs to be configured on the vehicle door latch. Therefore, the vehicle door latch needs to fulfill the power release, ice breaking and cinching functions, resulting in a more complicated structure of the vehicle door latch. In a solution known by the applicant, two pull wires are used to actuate a cinching device and an ice-breaking device respectively, which thereby require two actuators, causing the structure and control to be more complicated and the costs to be higher. Some other solutions are also proposed at present, in which a single cable and a single actuator are used to drive both the cinching device and the ice-breaking device at the same time.
[0004] Summary of the Application
[0005] Considering the requirements for smart vehicles, the present application aims to propose a new vehicle door latch different from the existing door latches to fulfill the power release, ice-breaking and cinching functions of the vehicle door latch.
[0006] To achieve the above objective, the present application provides a vehicle door latch, comprising:
[0007] a locking device having a pawl and a catch that cooperates with the pawl;
[0008] a power release device having a cam and a release lever;
[0009] a mounting part provided with a cinching device (3) and an ice-breaking device, and connected to an actuator and can be rotated by the actuator;
[0010] wherein the vehicle door latch further comprises:
[0011] an interruption lever being capable of engaging with the cinching device;
[0012] a switch lever being capable of engaging with the interruption lever, the ice-breaking device and the release lever.
[0013] According to one aspect of the present application, the switch lever has a first part, a second part and a third part, wherein the first part, the second part and the third part are fixed together; the first part is capable of engaging with the release lever, the second part is capable of engaging with the ice breaking device, and the third part is capable of engaging with the interruption lever.
[0014] According to one aspect of the present application, the first part, the second part and the third part are all rod-shaped, and the three parts are in different planes in the direction of the rotation axis of the switch lever.
[0015] According to one aspect of the present application, the cinching device has a plate-shaped body, one end of which is rotatably connected to the mounting part, and the other end of which has a catch engaging portion that engages with the catch; an interruption lever engaging portion extending perpendicularly to the body is provided on the body.
[0016] According to one aspect of the present application, the ice-breaking device has a plate-shaped body, one end of which is rotatably connected to the mounting part, and the other end has a catch engaging portion that engages with the catch; a switch lever second part engaging portion is provided on the body.
[0017] According to one aspect of the present application, the interruption lever is provided with:
[0018] a cinching device engaging portion for engaging with the interruption lever, the cinching device engaging portion having a curved profile and being capable of acting unidirectionally with the interruption lever during rotation within a certain angular range; and
[0019] a switch lever third part engaging portion for engaging with the third part of the switch lever, the switch lever third part engaging portion being an elongated groove, in which the third part of the switch lever is accommodated, the switch lever third part engaging portion and the third part of the switch lever can interact with each other in both directions.
[0020] According to one aspect of the present application, the vehicle door latch further comprises a pawl release lever fixedly connected to the pawl and capable of engaging with the pawl release lever engaging portion of the release lever.
[0021] According to one aspect of the present application, the rotation axes of the mounting part, cinching device, ice-breaking device, interruption lever, switch lever, and release lever are parallel to each other and do not overlap.
[0022] According to one aspect of the present application, during the cinching process, the cinching device engages with the catch and causes the catch to rotate in a first direction, and the ice-breaking device engages with the switch lever but not with the catch.
[0023] According to one aspect of the present application, during the ice breaking process, the ice breaking device engages with the catch and causes the catch to rotate in a second direction, and the interruption lever engages with the cinching device so that the cinching device does not engage with the catch.
[0024] As can be seen, the present application proposes a new vehicle door latch, which possesses the functions of power release, ice breaking and cinching, and its interruption lever and switch lever can ensure that the components do not interfere with each other during the fulfillment of different functions, so that the three functions can all be performed correctly.
[0025] Other features and advantages of the present application will be described in detail below with reference to the accompanying drawings.Brief Description of the Drawings
[0026] The features and advantages of the present application will be clearly understood through a detailed description provided below with reference to the accompanying drawings. It will be appreciated that the following drawings are only schematic and not necessarily drawn to scale, so they cannot be regarded as limitations of the present application.
[0027] Fig. 1 is a perspective view of a vehicle door latch of the present application.
[0028] Fig. 2 is a top view of the vehicle door latch shown in fig. 1.
[0029] Fig. 3 is a bottom view of the vehicle door latch shown in fig. 1.
[0030] Fig. 4 is a schematic diagram of a switch lever in the vehicle door latch of the present application.
[0031] Fig. 5 is a working schematic diagram of the vehicle door latch of the present application when performing the cinching function.
[0032] Fig. 6 is a working schematic diagram of the vehicle door latch of the present application when performing the power release function.
[0033] Fig. 7 is a working schematic diagram of the vehicle door latch of the present application when performing the ice-breaking function.
[0034] Detailed Description of the Embodiments
[0035] Embodiments of the present application are described below with reference to the drawings. In the following description, numerous specific details are set forth in order to make those skilled in the art fully understand and implement the present application. However, it will be apparent to those skilled in the art that the present application may be implemented without some of these specific details. Furthermore, it will be appreciated that the present application is not limited to the specific embodiments described herein. On the contrary, any combination of features and elements described below can be used to implement the application, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments and advantages are for illustration only, and should not be regarded as elements or limitations of the claims, unless explicitly stated in the claims.
[0036] Terms such as "first" and "second" are used herein to describe the elements of the present application, but they are only used to distinguish individual elements, and are not used to limit the nature, order or number of the elements. The terms "comprising" and "having" are used to indicate an open-ended inclusion, and mean that there may be other elements / components besides the listed elements / components.
[0037] Fig. 1 is a perspective view of a vehicle door latch of the present application, fig. 2 is a top view of the vehicle door latch shown in fig. 1, and fig. 3 is a bottom view of the vehicle door latch shown in fig. 1. The vehicle door latch will be described in the order from left to right of fig. 1 with reference to figs. 1 to 3. Firstly, the vehicle door latch of the present application comprises a pull wire 1, which is connected with an actuator (not shown) and can pull other parts of the latch connected therewith owing to the force from the actuator. Therefore, as a power transmission element, the pull wire 1 can also take other forms, as long as it can transmit the force from the actuator.
[0038] The pull wire 1 is connected to a mounting part 2, which is mounted on a fixed member (not shown) and can rotate around an axis shown in fig. 1. For example, the mounting part 2 has a hole at the axis, and can be matched with a corresponding structure on the fixed part to rotate around the axis. The fixed part here can be a bottom plate. The mounting part 2 is respectively connected with a cinching device 3 and an ice-breaking device 5 which can rotate relative to the mounting part 2. The mounting part 2 is plate-like as a whole, and the thickness direction of the plate is parallel to the rotation axis of the mounting part 2.
[0039] The cinching device 3, also known as a cinching lever, has an elongated plate-like body. One end of the body is rotatably connected to the mounting part 2 through a cinching connecting shaft 4, and the other end is provided with an interruption lever engaging portion 31 extending from the body in a direction parallel to the cinching connecting shaft 4, wherein the interruption lever engaging portion 31 can be engaged with an interruption lever 7, which will be described later. The interruption lever engaging portion 31 may be designed as a cylindrical structure. As can be seen from the plans shown in figs. 2 and 3, on one end of the body where the interruption lever engaging portion 31 is provided, a catch engaging portion is further provided for engaging with a catch 15, which will be described later.
[0040] The ice-breaking device 5 can also be called an ice-breaking lever, and has an elongated plate-like body. One end of the body is rotatably connected to the mounting part 2 through an ice-breaking connecting shaft 6, and the other end is provided with a catch engaging portion. Specifically, in the view shown in fig. 3, an angular catch engaging portion can be seen. In addition, as shown in fig. 1, the ice-breaking device 5 is further provided with a switch lever second part engaging portion 51 extending from the body in a direction parallel to the ice-breaking connecting shaft 6, wherein the switch lever second part engaging portion 51 can be engaged with a switch lever 8, which will be described later. The switch lever second part engaging portion 51 may be designed as a plate-like structure perpendicular to the body.
[0041] The interruption lever 7 has a plate-shaped body. As shown in fig. 1, the interruption lever 7 has a rotation axis, so it can rotate around the rotation axis. In fig. 1, the axis of the rotation shaft of the interruption lever 7 is shown by dotted lines. The interruption lever 7 can be mounted to a fixed part, such as a housing. The interruption lever 7 has two engaging portions, namely, a cinching device engaging portion for engaging with the interruption lever engaging portion 31 and a switch lever third part engaging portion for engaging with the third part 83 on the switch lever 8. The cinching device engaging portion has a curved profile of a certain length, so that it can act unidirectionally with the interruption lever engaging portion 31 during rotation within a certain angular range. "Act unidirectionally" here means that a component can apply force to another component in contact with it when rotating in a direction, but cannot apply force to said another component in contact with it when rotating in another direction. The switch lever third part engaging portion is preferably implemented as an elongated groove in which the third part 83 on the switch lever 8 can be accommodated, so that the switch lever third part engaging portion and the third part 83 on the switch lever 8 can act bi-directionally with each other.
[0042] Fig. 4 further shows the detailed structure of the switch lever 8. As can be seen clearly from fig. 4, the switch lever 8 includes three parts, namely a first part 81, a second part 82 and a third part 83. The three parts are fixed relative to each other and can rotate around a same axis. As mentioned above, the second part 82 is for interacting with the switch lever second part engaging portion 51, and the third part 83 is for interacting with the switch lever third part engaging portion of the interruption lever 7.
[0043] As an exemplary embodiment, the first part 81, the second part 82 and the third part 83 shown in the drawings are in different planes in the direction along the axis. The second part 82 and the third part 83 are rod-shaped, and their angular difference in the length directions is, for example, less than 15°. The first part 81 is also designed as a rod, and its length direction forms an angle of more than 100° with the length direction of the second part 82 and the third part 83. The parameters such as dimensions and angles shown in the drawings are only exemplary, and are not necessarily followed in the design. It is available as long as the function can be fulfilled.
[0044] The first part 81 can be functionally / operatively connected with the release lever 14, so as to rotate the release lever 14 by its own rotation. As can be clearly seen from the top view in fig. 2, the release lever 14 has three portions: the first part engaging portion, the pawl release lever engaging portion, and the cam engaging portion. The three portions are fixed relative to each other and can rotate around the same axis, and they are spaced apart from each other at a certain angle. Fig. 1 shows the rotation axis of the release lever 14 by dotted lines.
[0045] The cam engaging portion of the release lever 14 is engaged with a cam 13 and can rotate with the rotation of the cam 13. The cam 13 can rotate synchronously with a gear 16, and the gear 16 meshes with a worm 12, which is connected with an output shaft of a motor 11. The gear 16 is preferably in the form of a helical gear.
[0046] The pawl release lever engaging portion of the release lever 14 is engaged with the pawl release lever 9. The pawl release lever 9 has a rotating shaft, so that it can rotate around its rotating shaft. With further reference to fig. 3, the pawl release lever 9 and the pawl 10 are fixedly arranged, disposed in different planes in the direction perpendicular to the axis of the rotating shaft, and they have the same rotating shaft. The pawl 10 is engaged with a catch 15. The catch 15 can rotate around an axis shown by a dotted line in fig. 1. The catch 15 has an opening portion, into which pawl teeth of the pawl 10 can be stuck.
[0047] In addition, as can be seen from fig. 3, the catch 15 further includes a cinching device engaging portion for engaging with the catch engaging portion of the cinching device 3 and an ice-breaking device engaging portion for engaging with the angular catch engaging portion of the ice-breaking device 5.
[0048] In addition, although not shown in the drawings, elastic members are provided for the mounting part 2, the cinching device 3, the ice-breaking device 5, the switch lever 8, the pawl 10, the release lever 14 and the catch 15 respectively in order to reset them. The elastic members may be torsion springs.
[0049] The above is a description of the components in the vehicle door latch of the present application as well as their relationships. Respective functions of the vehicle door latch in the present application will be described below on the basis of the above description.
[0050] Generally speaking, the vehicle door latch of the present application has the functions of power release, cinching and ice breaking. Fig. 5 shows the working schematic diagram of the vehicle door latch of the present application when performing the cinching function, fig. 6 shows the working schematic diagram of the vehicle door latch of the present application when performing the power release function, and fig. 7 shows the working schematic diagram of the vehicle door latch of the present application when performing the ice-breaking function. To facilitate understanding, the figures show the comparison between different states of the vehicle door latch, with different states being separated by boxes, and each box showing a perspective top view and bottom view. In addition, the directions of rotation or movement of related components are indicated by arrows, and key engaging positions are indicated by boxes. For the sake of simplicity, the components related to said functions instead of all components are shown in figs. 5 to 7.
[0051] Fig. 5 shows three states of the vehicle door latch. When performing the cinching function, the vehicle door latch is at first in the leftmost initial state. In the initial state, the cinching device 3 is not engaged with the catch 15, and the door latch is not locked by the catch 15. In this state, the actuator connected with the pull wire 1 acts to rotate the mounting part 2, driving the body of the cinching device 3 located on the mounting part 2 to move, thereby pushing the catch 15 to rotate, and finally making the catch 15 reach the fully locked position. The moment when the catch engaging portion of the cinching device 3 starts to engage with the catch 15 can be defined as the beginning of the cinching function, and the moment when the catch 15 reaches the fully locked position can be defined as the end of the cinching function. The middle and right boxes in fig. 5 show the beginning and ending states of the cinching function. In the whole cinching process, the switch lever second part engaging portion 51 of the ice-breaking device 5 is limited by the second part 82 of the switch lever 8, so during the rotation of the catch 15, the catch engaging portion of the ice-breaking device 5 cannot be engaged with the catch 15, as shown in the upper perspective view in the right box of fig. 5.
[0052] Fig. 6 shows the process of power release. In this process, a motor 11 is used as a power source to drive related components to move. The left view in fig. 6 shows the initial state, and the right view shows the completion of power release. In the initial state, the pawl 10 is engaged with the catch 15. When the motor 11 is running, the worm 12 rotates with the rotor of the motor, and then drives the gear 16 and the cam 13 rotating synchronously with the gear 16 to rotate. The cam 13 acts on the release lever 14, which acts on the pawl release lever 9 and the switch lever 8 at the same time, thereby making the pawl 10 in fixed connection with the pawl release lever 9 disengaged from the catch 15.
[0053] Besides disengaging the pawl 10 from the catch 15, the release lever 14 also further drives the switch lever 8 to rotate, making the second part 82 of the switch lever 8 disengaged from the switch lever second part engaging portion 51 of the ice-breaking device 5. Fig. 4 shows the disengagement state. At this time, the ice-breaking function is available.
[0054] Further, the third part 83 of the switch lever 8 drives the interruption lever 7 to rotate, making the cinching device engaging portion of the interruption lever 7 engaged with the interruption lever engaging portion 31 of the cinching device 3, and pushing the cinching device 3 away in the process of rotation to disable the cinching.
[0055] As shown above, after the power release of fig. 6 is completed, the switch lever 8 is in a state that ice-breaking is available. With reference to fig. 7, in the ice-breaking function, its initial state corresponds to the state of completion of power release. In the ice-breaking function, the pull wire 1 is pulled by the actuator, the mounting part 2 is rotated by the pulling force, and the body of the ice-breaking device 5 rotates along. During the rotation, the catch engaging portion of the ice-breaking device 5 engages with the ice-breaking device engaging portion of the catch 15, as shown in the right view of fig. 7, thus driving the catch 15 to rotate to fulfill the ice-breaking function.
[0056] During the fulfillment of the ice-breaking function, the cinching device 3 still can't touch the catch 15 due to the blockage by the interruption lever 7, making the cinching impossible, thereby avoiding it from interfering with the ice-breaking function.
[0057] As can be seen, in the present application, a pull wire with some structural design cooperates with the power release function to selectively fulfill the cinching function and ice-breaking function. This design reduces the number of actuators, and accordingly the number of components of the vehicle door latch, and cuts down the costs while fulfilling all the required functions. In addition, the interruption lever and switch lever provided can ensure that the components do not interfere with each other during the fulfillment of different functions, so that the three functions can all be performed correctly.
[0058] Those skilled in the art can make various modifications and variations to the embodiments disclosed herein without departing from the scope or spirit of the present application. Other embodiments of the present application will be apparent to those skilled in the art according to the practice of the present application disclosed in this Specification. This Specification and the examples disclosed herein are considered to be illustrative only, and the true scope of the present application is determined by the appended claims and their equivalents.
Claims
1.A vehicle door latch, comprising:a locking device having a pawl (10) and a catch (15) that cooperates with the pawl;a power release device having a cam (13) and a release lever (14) ;a mounting part (2) provided with a cinching device (3) and an ice-breaking device (5) , and connected to an actuator and can be rotated by the actuator;characterized in that the vehicle door latch further comprises:an interruption lever (7) being capable of engaging with the cinching device (3) ;a switch lever (8) being capable of engaging with the interruption lever (7) , the ice-breaking device (5) and the release lever (14) .2.The vehicle door latch according to claim 1, characterized in that,the switch lever (8) has a first part (81) , a second part (82) and a third part (83) , wherein the first part (81) , the second part (82) and the third part (83) are fixed together; the first part is capable of engaging with the release lever (14) , the second part is capable of engaging with the ice breaking device (5) , and the third part is capable of engaging with the interruption lever (7) .3.The vehicle door latch according to claim 2, characterized in that,the first part (81) , the second part (82) and the third part (83) are all rod-shaped, and the three parts are in different planes in the direction of the rotation axis of the switch lever (8) .4.The vehicle door latch according to claim 2 or 3, characterized in that,the cinching device (3) has a plate-shaped body, one end of which is rotatably connected to the mounting part, and the other end of which has a catch engaging portion that engages with the catch; an interruption lever engaging portion (31) extending perpendicularly to the body is provided on the body.5.The vehicle door latch according to claim 2 or 3, characterized in that,the ice-breaking device (5) has a plate-shaped body, one end of which is rotatably connected to the mounting part, and the other end has a catch engaging portion that engages with the catch; a switch lever second part engaging portion (51) is provided on the body.6.The vehicle door latch according to claim 2 or 3, characterized in that,the interruption lever (7) is provided with:a cinching device engaging portion for engaging with the interruption lever, the cinching device engaging portion having a curved profile and being capable of acting unidirectionally with the interruption lever during rotation within a certain angular range; anda switch lever third part engaging portion for engaging with the third part (83) of the switch lever (8) , the switch lever third part engaging portion being an elongated groove, in which the third part of the switch lever is accommodated, the switch lever third part engaging portion and the third part of the switch lever can interact with each other in both directions.7.The vehicle door latch according to any one of claims 1-3, characterized by further comprising:a pawl release lever (9) fixedly connected to the pawl, and capable of engaging with the pawl release lever engaging portion of the release lever (14) .8.The vehicle door latch according to any one of claims 1-3, characterized in that,the rotation axes of the mounting part (2) , cinching device (3) , ice-breaking device (5) , interruption lever (7) , switch lever (8) , and release lever (14) are parallel to each other and do not overlap.9.The vehicle door latch according to any one of claims 1-3, characterized in that,during the cinching process, the cinching device engages with the catch and causes the catch to rotate in a first direction, and the ice-breaking device engages with the switch lever but not with the catch.10.The vehicle door latch according to any one of claims 1-3, characterized in that,during the ice breaking process, the ice breaking device engages with the catch and causes the catch to rotate in a second direction, and the interruption lever engages with the cinching device so that the cinching device does not engage with the catch.
Citation Information
Patent Citations
Automotive door latch with power opening feature
US20190292817A1