CN216478863U - Electronic parking device and speed change system - Google Patents

Abstract

The utility model discloses an electronic parking device and a speed change system, wherein the electronic parking device comprises a shell, a parking shaft, a parking motor and a pawl ratchet wheel assembly, wherein the parking motor and the pawl ratchet wheel assembly are arranged in the shell, the parking shaft is respectively connected with the parking motor and the pawl ratchet wheel assembly, the parking shaft is arranged to rotate under the driving of the parking motor so as to trigger the pawl ratchet wheel assembly to act to realize parking and unlocking, the parking shaft comprises an emergency driving end extending out of the shell, and the emergency driving end is arranged to drive the parking shaft to rotate under the action of external force so as to finish manual parking and/or unlocking under emergency conditions. The utility model relates to the technical field of vehicle parking, and provides an electronic parking device and a speed change system.

Description

Electronic parking device and speed change system

Technical Field

The present disclosure relates to parking devices, and particularly to an electronic parking device and a transmission system.

Background

The market proportion of new energy electric driving products is increasing day by day, electronic parking devices are also increasing, and hydraulic parking and mechanical parking systems are gradually reduced. Along with diversification of automobile functions, the emergency parking function of the parking device gradually exposes the head angle, and partial new energy speed reducers do not need active lubrication and can pull the vehicle at high speed for a long time after failure. However, when a new energy automobile has an electrical fault or a software BUG, the emergency unlocking function can be realized through an on-vehicle standard tool by the emergency unlocking scheme, so that the trailer can be maintained conveniently, the emergency parking function can be realized, and the safety performance of the whole automobile is greatly improved.

At present, most parking devices in the market only have a single emergency unlocking function or an emergency parking function, and usually need another set of electric structure assistance, so that the structure is complex and the cost is high.

SUMMERY OF THE UTILITY MODEL

The application provides an electron parking device, be in including casing, parking axle, and setting parking motor and pawl ratchet subassembly in the casing, the parking axle respectively with parking motor and pawl ratchet subassembly are connected, the parking axle sets up to be in the parking motor drives down the rotation, in order to trigger pawl ratchet subassembly action and realization parking and unblock, the parking axle is including stretching out the urgent drive end of casing, urgent drive end sets up to receiving exogenic action to drive the parking axle is rotatory to accomplish manual parking and/or unblock under emergency.

Compared with the prior art, the technical scheme of the application can realize parking under emergency and unlocking through applying force at the emergency driving end, and is simple in structure.

In some exemplary embodiments, the parking shaft includes a main shaft body, and the emergency driving end includes a connector, and the connector is disposed at one end of the main shaft body and is fixedly connected to the main shaft body.

In some exemplary embodiments, the connector mates with an output of an onboard tool; or the electronic parking device comprises a transmission assembly, the connector is connected with the transmission assembly, and the transmission assembly is set to be driven to rotate under the action of external force.

In some exemplary embodiments, the housing is provided with a mounting hole for the spindle body to extend out, the spindle body is sleeved with an oil seal, and the oil seal is arranged corresponding to the mounting hole.

In some exemplary embodiments, a retaining ring is arranged on the spindle body, and the retaining ring is arranged on one side of the oil seal close to the connector.

In some exemplary embodiments, further comprising a shift gear fixed to the main shaft body;

the pawl and ratchet assembly comprises a ratchet wheel and a pawl which are rotatably arranged in the shell, and a limiting assembly is arranged between the pawl and the gear shifting gear so as to limit the pawl when unlocking.

In some exemplary embodiments, the limiting component comprises a limiting protrusion arranged on the pawl, the edge of the gear shifting gear comprises a gear section and an arc section, and the limiting protrusion abuts against the arc section to limit the pawl during unlocking.

In some exemplary embodiments, the shift gear is provided with a protruding limiting rib, the inner wall of the housing is provided with two limiting surfaces located on a stroke of the limiting rib, and the limiting rib is configured to move between the two limiting surfaces to limit a rotation angle of the shift gear.

In some exemplary embodiments, the device further comprises a cam, the cam is sleeved on the spindle body, and the pawl is configured to cooperate with the cam.

In some exemplary embodiments, one end of the cam is provided with a first protrusion, the shift gear is provided with a sliding groove, the first protrusion is configured to slide in the sliding groove, and the first protrusion is configured to abut against one end of the sliding groove in an unlocking process, so that the shift gear drives the cam to rotate.

In some exemplary embodiments, the parking axle further includes a first torsion spring, the first torsion spring is sleeved on the main axle body and is located on one side of the cam, which faces away from the gear shifting gear, one end of the first torsion spring is connected with the main axle body, and the other end of the first torsion spring is connected with the cam, so as to drive the cam to rotate in the parking process.

The application provides a speed change system, which comprises the electronic parking device.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.

Drawings

The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.

FIG. 1 is a schematic diagram illustrating a parking state of an electronic parking device according to an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating an unparked state of the electronic parking device according to the embodiment of the present application;

FIG. 3 is a first schematic illustration of the parking shaft of FIG. 1;

FIG. 4 is a second schematic illustration of the parking shaft of FIG. 1;

fig. 5 is a third schematic view of the parking shaft of fig. 1.

The reference numbers illustrate:

100-parking motor, 101-transmission gear set, 200-parking axle, 201-main axle body, 202-emergency driving end, 203-gear shifting gear, 204-first torsion spring, 205-cam, 206-limiting rib, 207-gear segment, 208-connector, 209-sliding groove, 210-first protrusion, 211-arc surface segment, 212-retainer ring, 213-oil seal, 214-matching surface, 215-cylindrical pin, 216-retainer ring, 300-pawl ratchet component, 301-pawl, 302-ratchet, 303-second torsion spring, 304-limiting protrusion, 305-rotating shaft and 400-shell.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The existing parking device only has a single emergency unlocking function or an emergency parking function, needs an electric structure for assistance, and has a complex integral structure and relatively high manufacturing cost.

Referring to fig. 1 to 5, an electronic parking device according to an embodiment of the present invention includes a housing 400, a parking shaft 200, and a parking motor 100 and a pawl and ratchet assembly 300 disposed in the housing 400, wherein the parking shaft 100 is connected to the parking motor 100 and the pawl and ratchet assembly 300 respectively, and the parking shaft can be driven by the parking motor 100 to rotate so as to trigger the pawl and ratchet assembly 300 to perform parking and unlocking. The parking shaft 200 comprises an emergency driving end 202 at one end, the emergency driving end 202 extends out of the shell 400, and the emergency driving end 200 can rotate under the action of external force to drive the parking shaft 100 to rotate, so that manual parking and manual unlocking can be completed in an emergency. Therefore, the electronic parking device can realize parking in an emergency and unlocking by applying force on the emergency driving end 202, namely rotating the emergency driving end 202, and has a simple structure.

As shown in fig. 1 and 2, an output end of the parking motor 100 is connected to the parking shaft 200 through a transmission gear set 101, and can drive the parking shaft 200 to rotate. Meanwhile, the parking shaft 200 can be matched with the pawl-ratchet assembly 300, so that the pawl 301 can be pressed against the pawl to be inserted into a tooth groove of the ratchet 302, the ratchet 302 is locked, wheels cannot rotate, and a vehicle cannot move, namely, the vehicle is in a parking state; the parking shaft 200 can release the contact with the pawl 301 to disengage the pawl 302, so that the wheel can rotate freely, and the vehicle can move, i.e., the vehicle is in an unparked state. In addition, the process of switching from the parked state to the unparked state is an unlocking process, and the process of switching from the unparked state to the parked state is a parking process.

As shown in fig. 1 to 5, the parking axle 200 includes a main axle body 201, the main axle body 201 is rotatably connected to the housing 400 so that it can stably rotate, the main axle body 201 is further sleeved with a shift gear 203, a cam 205, and a first torsion spring 204, wherein the shift gear 203, the cam 205, and the first torsion spring 204 are sequentially disposed at an end close to the emergency driving end 202, the shift gear 203 is fixed to the main axle body 201 so that it can rotate with the main axle body 201, and the cam 205 can rotate relative to the main axle body 101. Specifically, the gear shift 203 is in a sector shape, and is fixed on the main shaft body 101 through a cylindrical pin 215, and the edge of the gear shift has a gear section 207 and an arc section 211 which are connected, the gear section 207 is processed with teeth matched with the transmission gear set 101, and the arc section 211 is in an arc shape. The side of the gear shift gear 203 facing away from the cam 205 is provided with a protruding limiting rib 206, the limiting rib 206 is far away from the parking motor 100, the inner wall of the housing 400 is provided with two limiting surfaces (not shown in the figure) on the stroke of the limiting rib, the limiting rib 206 can move between the two limiting surfaces, and the two limiting surfaces are located at two limit positions of the rotation of the gear shift gear 203 to limit the rotation angle of the gear shift gear 203. The cam 205 is provided with a matching surface 214 in the circumferential direction, and the matching surface 214 is abutted against the pawl 301 so as to lock the pawl on the ratchet wheel 302; beyond the mating surface 214, the cam 205 releases the binding of the pawl 301. The cam 205 is provided with a first protrusion 210 protruding from an end thereof adjacent to the shift gear 203, and correspondingly, the shift gear 203 is provided with a sliding slot 209, the sliding slot 209 is a circular arc track, and the first protrusion 210 is inserted into the sliding slot 209 and can slide in the sliding slot 209. One end of the first torsion spring 204 abuts against the groove of the spindle body 201, the stroke of the first torsion spring is connected with the spindle body 201, the other end of the first torsion spring abuts against the cam 205, and the first torsion spring 204 can drive the cam 205 to rotate counterclockwise when the spindle body 201 rotates counterclockwise. A stop ring 216 is disposed between the first torsion spring 204 and the cam 205 to axially limit the cam 205, and the stop ring 216 is sleeved on the spindle body 201 and fixed with the spindle body 201. In addition, the first protrusion 210 is engaged with the sliding slot 209, and when the spindle body 201 rotates clockwise, the first protrusion 210 abuts against one end of the sliding slot 209, so that the shift gear 203 can push the first protrusion 210 to rotate, and the shift gear 203 can drive the cam 205 to rotate clockwise.

As further shown in fig. 1 and 2, the pawl-and-ratchet assembly 300 includes a ratchet 302 rotatably disposed within a housing 400 and a pawl 301 rotatably coupled to the housing 400 by a shaft 305 thereon such that the pawl 301 rotates about the shaft 305. An end of the pawl 301 remote from the shaft 305 is engageable with the cam 205 and the ratchet 302, and a limit assembly is provided between the end and the shift gear 203 to limit the pawl 302 when unlocked. Specifically, the limiting assembly comprises a limiting protrusion 304 arranged on the pawl 301, when the pawl 302 is rotated to be separated from the ratchet wheel 302, the limiting protrusion 304 can be abutted against the arc-shaped section 211 of the shift gear 203 to limit the pawl 301, so that the impact force of the pawl 301 is transmitted to the parking shaft 200 through the shift gear 203 and finally transmitted to the housing 400, thereby preventing the pawl 30 from directly impacting the housing 400 during unlocking, and greatly reducing unlocking noise. In addition, the rotating shaft 305 is sleeved with a second torsion spring 303, and the second torsion spring 303 can provide the force for resetting the pawl 301 after the limiting protrusion 304 contacts the shifting gear 203.

Under a normal state, parking motor 100 can work normally, parking shaft 200 can be driven by parking motor 100 to rotate clockwise, shift gear 203 also rotates clockwise, meanwhile, shift gear 203 drives cam 205 to rotate, so that matching surface 214 loses constraint on pawl 301, pawl 301 is free of constraint, pawl 301 rotates clockwise under the action of ratchet 302, finally, limiting protrusion 304 on pawl 301 is matched with shift gear 203 for limiting, and then stops rotating, and under the torque of second torsion spring 303, the position of pawl 301 is kept between ratchet 302 and shift gear 203, so that an unlocking process is completed, and the position of pawl 301 also provides preparation for a subsequent parking process. The parking motor 100 can drive the parking axle 200 to rotate anticlockwise, the shift gear 203 rotates anticlockwise, meanwhile, the first torsion spring 204 is compressed to drive the cam 205 to rotate anticlockwise, the cam 205 is matched with the molded line of the pawl 301 to force the parking pawl 301 to rotate anticlockwise, the pawl is enabled to be locked at the P gear position, and finally the pawl 301 is clamped into the tooth groove of the ratchet 302, so that the parking process is completed.

As shown in fig. 1 to 5, one end of the main shaft body 201 is provided with a connector 208, the connector 208 constitutes the emergency driving end, and the connector 208 and the main shaft body 201 are an integral piece and rotate synchronously. The housing 400 is required to be provided with a mounting hole (not shown), the spindle body 201 penetrates through the mounting hole and extends out of the housing 400, the spindle body 201 is sleeved with an oil seal 213, and the oil seal 213 is arranged corresponding to the mounting hole to prevent oil in the housing 400 from flowing out. Specifically, the connector 203 is hexagonal and can be matched with an output end of a driver tool to manually rotate the spindle body 201 by the driver tool, but the connector is not limited to be hexagonal, and may be a flat handle. Further, the main shaft body 201 is provided with a retainer 212, and the retainer 212 is located on the side of the oil seal 213 close to the connection head 208. In an emergency, namely when the parking motor 100 cannot work normally, the connector 208 is rotated clockwise by the vehicle-mounted tool to form clockwise rotation of the parking shaft 200, the shift gear 203 also rotates clockwise, and simultaneously the shift gear 203 drives the cam 205 to rotate, so that the mating surface 214 loses the constraint on the pawl 301, the pawl 301 is unconstrained, the pawl 301 rotates clockwise under the action of the ratchet 302, finally, the limiting protrusion 304 on the pawl 301 is matched with the shift gear 203 for limiting and then stops rotating, and most under the torque of the second torsion spring 303, the position of the pawl 301 is kept between the ratchet 302 and the shift gear 203, the unlocking process is completed, and the position of the pawl 301 also provides preparation for the subsequent parking process. The connecting head 208 is rotated anticlockwise by a vehicle-mounted tool, so that the parking shaft 200 rotates anticlockwise, the shifting gear 203 rotates anticlockwise, the first torsion spring 204 is compressed to drive the cam 205 to rotate anticlockwise, the cam 205 is matched with the profile of the pawl 301 to force the parking pawl 301 to rotate anticlockwise, the pawl is self-locked at the P-gear position, and finally the pawl 301 is clamped into the tooth groove of the ratchet 302, so that the parking process is completed.

In some exemplary embodiments, the electronic parking device further includes a transmission assembly (not shown), and the connector 208 may be connected to the transmission assembly, and the transmission assembly may rotate the connector to perform an unlocking process and a parking process in an emergency state. The transmission assembly may be a multi-link member or a cable, all of which may transmit force to the connecting head 208.

In some exemplary embodiments, a transmission system includes the electronic parking device described above.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (12)

1. The utility model provides an electron parking device, includes casing, parking axle, and sets up parking motor and pawl ratchet subassembly in the casing, the parking axle respectively with parking motor and pawl ratchet subassembly are connected, the parking axle sets up to be in the parking motor drives down the rotation, in order to trigger pawl ratchet subassembly action and realization parking and unblock, its characterized in that, the parking axle is including stretching out the urgent drive end of casing, urgent drive end sets up to receiving the exogenic action to drive the parking axle is rotatory to accomplish manual parking and/or unblock under emergency.

2. The electronic parking device of claim 1, wherein the parking axle comprises a spindle body, and the emergency driving end comprises a connector, and the connector is disposed at one end of the spindle body and is fixedly connected with the spindle body.

3. The electronic parking device according to claim 2, wherein the connector is matched with an output end of an onboard tool; or the electronic parking device comprises a transmission assembly, the connector is connected with the transmission assembly, and the transmission assembly is set to be driven to rotate under the action of external force.

4. The electronic parking device according to claim 2, wherein a mounting hole for the spindle body to extend out is formed in the housing, and an oil seal is sleeved on the spindle body and arranged corresponding to the mounting hole.

5. The electronic parking device according to claim 4, wherein a retaining ring is arranged on the spindle body, and the retaining ring is arranged on one side of the oil seal close to the connector.

6. The electronic parking device according to any one of claims 2 to 5 further comprising a shift gear fixed to the spindle body;

the pawl and ratchet assembly comprises a ratchet wheel and a pawl which are rotatably arranged in the shell, and a limiting assembly is arranged between the pawl and the gear shifting gear so as to limit the pawl when unlocking.

7. The electronic parking device of claim 6 wherein the limiting component comprises a limiting protrusion disposed on the pawl, the edge of the shift gear comprises a gear section and an arc section, and the limiting protrusion abuts against the arc section to limit the pawl during unlocking.

8. The electronic parking device according to claim 6, wherein the shift gear is provided with a protruding limiting rib, the inner wall of the housing is provided with two limiting surfaces on a stroke of the limiting rib, and the limiting rib is configured to move between the two limiting surfaces to limit a rotation angle of the shift gear.

9. The electronic parking device of claim 6 further comprising a cam sleeved on the spindle body, the pawl configured to mate with the cam.

10. The electronic parking device according to claim 9, wherein a first protrusion is disposed at one end of the cam, a sliding slot is disposed on the shift gear, the first protrusion is configured to slide in the sliding slot, and the first protrusion is configured to abut against one end of the sliding slot during unlocking, so that the shift gear drives the cam to rotate.

11. The electronic parking device of claim 10, wherein the parking axle further comprises a first torsion spring, the first torsion spring is sleeved on the spindle body and located on one side of the cam, which faces away from the gear shifting gear, one end of the first torsion spring is connected with the spindle body, and the other end of the first torsion spring is connected with the cam, so as to drive the cam to rotate in the parking process.

12. A transmission system characterized by comprising the electronic parking device according to any one of claims 1 to 11.

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