Electromechanical braking parking locking mechanism

Abstract

The electromechanical braking parking locking mechanism comprises a mounting shell, a first ratchet wheel, a second ratchet wheel, a first pawl, a second pawl and a locking motor, and the first ratchet wheel and the second ratchet wheel are both arranged at the output end of an electromechanical braking caliper motor; the first pawl and the second pawl are rotationally arranged on the mounting shell; the output end of the locking motor is in transmission connection with a push rod, the push rod is movably provided with a first pin shaft and a second pin shaft, the first pin shaft is connected with the first pawl, and the second pin shaft is connected with the second pawl. When a parking command is received, the locking motor works to drive the first pawl and the second pawl to rotate, the first pawl abuts against the first ratchet wheel, meanwhile, the second pawl abuts against the second ratchet wheel, and the parking state and the running state are opposite through the mode. Therefore, the two locking structures are arranged, play a role at the same time and serve as locking redundancy, one of the two locking structures can be effectively prevented from being damaged due to mechanical performance and the like, and the parking locking effect can still be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle braking devices, in particular to an electronic mechanical brake parking locking mechanism. BACKGROUND

[0002] The electronic mechanical brake (EMB) system is a new brake system, which discards the traditional hydraulic components such as pipelines, so that the chassis layout is simpler, the adjustment speed is faster and more accurate, and the vehicle braking performance is improved. The EMB brake usually adopts a torque transmission by a ball screw inside a caliper, and since the ball screw has no self-locking structure, a special independent locking structure needs to be arranged to solve the parking brake problem. The locking structure replaces the traditional hydraulic device and parking mechanism, and has the advantages of simple structure, good braking effect and fast response time. SUMMARY The present application aims to solve the parking brake problem in the prior art. To this end, the present application provides an electronic mechanical brake parking locking mechanism.

[0003] According to the electronic mechanical brake parking locking mechanism of the present application, the first ratchet wheel and the second ratchet wheel are arranged at the output end of the caliper motor of the electronic mechanical brake, and the first ratchet wheel and the second ratchet wheel are arranged in a spaced manner. The first pawl and the second pawl are rotatably arranged in the mounting shell, and the first pawl and the second pawl are arranged in a one-to-one correspondence with the first ratchet wheel and the second ratchet wheel. The output end of the locking motor is drivingly connected with a push rod, the push rod movably has a first pin shaft and a second pin shaft, the first pin shaft is connected with the first pawl, the second pin shaft is connected with the second pawl, and the locking motor is used to drive the push rod to move so that the first pawl is clamped into the first ratchet wheel and the second pawl is clamped into the second ratchet wheel.

[0004] According to the electronic mechanical brake parking locking mechanism of the present application, at least the following beneficial effects are achieved: When receiving a parking command, the locking motor works to drive the first pawl and the second pawl to rotate, the first pawl abuts against the first ratchet wheel, and at the same time, the second pawl abuts against the second ratchet wheel, so that the parking state is achieved through the above form, and the driving state is opposite thereto. It can be seen that the present application has two locking structures, which work simultaneously and are redundant for locking, so that the locking parking function can be achieved even if one of them is damaged due to mechanical reasons. According to some embodiments of the present application, the first ratchet wheel is an external ratchet wheel.

[0005] According to some embodiments of the present application, the first pawl is provided with a first engagement end and a second engagement end in a spaced manner, and the first engagement end and the second engagement end are engaged with the first ratchet wheel at the same time.

[0006] According to some embodiments of the present application, the second ratchet is an inner ratchet.

[0007] According to some embodiments of the present application, the first ratchet is arranged on a driving gear shaft of a caliper motor of an electromechanical brake, and the second ratchet is arranged on a driven gear shaft of the caliper motor of the electromechanical brake.

[0008] According to some embodiments of the present application, a reset elastic member is arranged between the first ratchet and the first pawl, and the reset elastic member provides the first pawl with an elastic force pressing toward the first ratchet.

[0009] According to some embodiments of the present application, the reset elastic member is a spring, and two ends of the spring are respectively connected with a middle shaft of the first ratchet and an end of the first pawl away from the push rod.

[0010] According to some embodiments of the present application, the push rod is provided with two through slot holes, the through slot holes are long strip holes, and the first pin shaft and the second pin shaft respectively pass through the two through slot holes.

[0011] According to some embodiments of the present application, the mounting shell is a caliper shell of an electromechanical brake.

[0012] According to some embodiments of the present application, the locking motor is arranged in the caliper shell.

[0013] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or can be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0014] The present application will be further described below in conjunction with the drawings and embodiments, wherein: Fig. 1 It is a schematic view of a parking state of an electromechanical brake parking locking mechanism; Fig. 2 It is a schematic view of a driving state of an electromechanical brake parking locking mechanism; Fig. 3 It is a schematic view of a connection structure of a push rod.

[0015] REFERENCE NUMERALS First ratchet 100, second ratchet 200, first pawl 300, first meshing end 310, second meshing end 320, first rotating shaft 330, second pawl 400, second rotating shaft 410, locking motor 500, push rod 510, first pin shaft 511, second pin shaft 512, through slot hole 513, reset elastic member 600. DETAILED DESCRIPTION

[0016] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, for the purpose of explaining the present application, and should not be understood as a limitation of the present application.

[0017] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, etc. is based on the orientation or position relationship shown in the drawings, which is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0018] In the description of the present application, the plural refers to two or more. If there is a description of first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the sequence of technical features indicated.

[0019] In the description of the present application, unless otherwise explicitly limited, the words such as arrangement, installation, connection, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0020] The technical solutions of the present application will be described below in conjunction with the drawings. Obviously, the following described embodiments are part of the embodiments of the present application, not all embodiments.

[0021] Referring to Figs. 1 to 3 An electronic mechanical brake parking locking mechanism includes a mounting shell, a first ratchet wheel 100, a second ratchet wheel 200, a first pawl 300, a second pawl 400, a locking motor 500, the mounting shell can be part of the caliper shell of the electronic mechanical brake, or a shell specially used for setting the locking structure, and other installable parts of the electronic mechanical brake. When the mounting shell is part of the caliper shell of the electronic mechanical brake, the structure can be simplified, the entire structure is more compact, and the occupied space is reduced.

[0022] The first ratchet wheel 100 and the second ratchet wheel 200 are arranged on the output end of the caliper motor of the electronic mechanical brake, and can be fixed on the driving shaft and the driven shaft of the caliper motor. The specific connection position can be changed according to the actual situation. The present application locks the first ratchet wheel 100 and the second ratchet wheel 200 to keep the clamping force of the caliper motor.

[0023] The first ratchet wheel 100 and the second ratchet wheel 200 are arranged in a spaced manner, the first pawl 300 and the second pawl 400 are respectively arranged on the mounting shell through the first rotating shaft 330 and the second rotating shaft 410, the first pawl 300 and the second pawl 400 are arranged in a one-to-one correspondence with the first ratchet wheel 100 and the second ratchet wheel 200, the output end of the locking motor 500 is drivingly connected with a push rod 510, the locking motor 500 can drive the push rod 510 to move, the push rod 510 is movably provided with a first pin shaft 511 and a second pin shaft 512, the first pin shaft 511 is connected with the first pawl 300, the second pin shaft 512 is connected with the second pawl 400, the locking motor 500 drives the push rod 510 to move, so that the first pawl 300 is clamped into the first ratchet wheel 100 and the second pawl 400 is clamped into the second ratchet wheel 200, the two locking structures simultaneously act on the caliper motor to keep the clamping force, and the automobile is in a parking state; conversely, the locking motor 500 can drive the push rod 510 to move reversely, the first pawl 300 is separated from the first ratchet wheel 100, and the second pawl 400 is separated from the second ratchet wheel 200, so that the actual locking force is not generated, and the automobile is in a driving state.

[0024] When receiving a parking command, the locking motor 500 works to drive the first pawl 300 and the second pawl 400 to rotate, the first pawl 300 abuts against the first ratchet wheel 100, and simultaneously, the second pawl 400 abuts against the second ratchet wheel 200, so that the automobile is in a parking state, and conversely, the automobile is in a driving state. It can be known that the embodiment of the application is provided with two locking structures, which simultaneously act, as a locking redundancy, and can effectively prevent one from being damaged due to mechanical reasons and still have the locking parking function.

[0025] Further, the first ratchet wheel 100 is an outer ratchet wheel, the second ratchet wheel 200 is an inner ratchet wheel, the first ratchet wheel 100 is arranged on the driving gear shaft of the caliper motor of the electromechanical brake, and the second ratchet wheel 200 is arranged on the driven gear shaft of the caliper motor of the electromechanical brake, that is, is fixed on the shafts of the driving gear and the driven gear of the caliper motor respectively. The first ratchet wheel 100 is an outer ratchet wheel, and has better transmission; the second ratchet wheel 200 is an inner ratchet wheel, can save space, has more stable operation, and has better transmission stability. In other embodiments, the first ratchet wheel 100 and the second ratchet wheel 200 can both be outer ratchet wheels.

[0026] The first pawl 300 is provided with a first meshing end 310 and a second meshing end 320 in a spaced manner, in order to simultaneously mesh the first meshing end 310 and the second meshing end 320 with the first ratchet wheel 100, the first meshing end 310 and the second meshing end 320 are different in size, and the interval and size of the two are arranged according to actual conditions.

[0027] To ensure that the first pawl 300 can be quickly and automatically reset, a reset elastic element 600 is provided between the first ratchet 100 and the first pawl 300. The reset elastic element 600 continuously provides an elastic force that presses the first pawl 300 against the first ratchet 100, ensuring that the two can engage in a timely manner when needed.

[0028] The reset elastic element 600 is a spring. One end of the spring is connected to the intermediate shaft of the first ratchet 100, and the other end is connected to the end of the first pawl 300 away from the push rod 510. The intermediate shaft is rotatably mounted on the first ratchet 100. This connection method is not only simple in structure and reasonable in layout, but also provides a stable and sufficient elastic reset force for the first pawl 300, effectively improving its response speed and reset reliability, thereby improving the smoothness of the entire mechanism's operation and the accuracy of its actions.

[0029] Reference Fig. 3 The locking motor 500 is fixed to the caliper housing with screws. The push rod 510 has a through-slot 513, which is an elongated hole. The first pawl 300 is connected to the first pin 511, and the second pawl 400 is connected to the second pin 512. The first pin 511 and the second pin 512 pass through the two through-slots 513 respectively. When the push rod 510 moves, the first pin 511 and the second pin 512 slide along the corresponding through-slots 513, thereby driving the first pawl 300 to rotate around the first rotating shaft 330 and the second pawl 400 to rotate around the second rotating shaft 410. This causes the first pawl 300 to engage with the first ratchet 100 and the second pawl 400 to engage with the second ratchet 200, thus completing the locking.

[0030] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An electromechanical braking parking lock mechanism, characterized in that, include: Mounting housing; The first ratchet (100) and the second ratchet (200) are both located at the output end of the caliper motor of the electromechanical brake, and the first ratchet (100) and the second ratchet (200) are arranged at intervals; The first pawl (300) and the second pawl (400) are both rotatably mounted on the mounting housing, and the first pawl (300) and the second pawl (400) are respectively configured to correspond one-to-one with the first ratchet (100) and the second ratchet (200); A locking motor (500) has a push rod (510) connected to its output end. The push rod (510) is movably provided with a first pin (511) and a second pin (512). The first pin (511) is connected to the first pawl (300), and the second pin (512) is connected to the second pawl (400). The locking motor (500) is used to drive the push rod (510) to move so that the first pawl (300) engages with the first ratchet (100) and the second pawl (400) engages with the second ratchet (200).

2. The electromechanical braking parking lock mechanism according to claim 1, characterized in that, include: The first ratchet (100) is an outer ratchet.

3. The electromechanical braking parking lock mechanism according to claim 2, characterized in that, include: The first pawl (300) is provided with a first engagement end (310) and a second engagement end (320) at intervals, and the first engagement end (310) and the second engagement end (320) engage with the first ratchet (100) simultaneously.

4. The electromechanical braking parking lock mechanism according to claim 2, characterized in that, include: The second pawl (400) is an inner ratchet.

5. The electromechanical braking parking lock mechanism according to claim 4, characterized in that, include: The first ratchet (100) is located on the drive gear shaft of the electromechanical brake caliper motor, and the second ratchet (200) is located on the driven gear shaft of the electromechanical brake caliper motor.

6. The electromechanical braking parking lock mechanism according to claim 1, characterized in that, include: A reset elastic element (600) is provided between the first ratchet (100) and the first pawl (300), the reset elastic element (600) providing the first pawl (300) with an elastic force pressing against the first ratchet (100).

7. The electromechanical braking parking lock mechanism according to claim 6, characterized in that, include: The reset elastic element (600) is a spring, and the two ends of the spring are respectively connected to the intermediate shaft of the first ratchet (100) and the end of the first pawl (300) away from the push rod (510).

8. The electromechanical braking parking lock mechanism according to claim 1, characterized in that, include: The push rod (510) is provided with two through holes (513), which are elongated holes, and the first pin (511) and the second pin (512) pass through the two through holes (513) respectively.

9. The electromechanical braking parking lock mechanism according to claim 1, characterized in that, include: The mounting housing is a caliper housing for electromechanical braking.

10. The electromechanical braking parking lock mechanism according to claim 9, characterized in that, include: The locking motor (500) is located in the caliper housing.

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