CN220102029U - Cam driving structure, gear shifting and parking integrated actuating mechanism and gearbox - Google Patents

Abstract

The utility model discloses a cam driving structure, a gear shifting and parking integrated actuating mechanism and a gearbox, wherein the gear shifting and parking integrated actuating mechanism comprises a parking pawl, a plurality of gear shifting forks and a plurality of sliding racks, each sliding rack is respectively connected to the corresponding gear shifting fork or the corresponding parking pawl in a transmission mode, the cam driving structure comprises a base, a cam assembly and a locking assembly, a driving rotating shaft is rotatably arranged on the base, and a shaft shoulder and a mounting shaft section are formed on the driving rotating shaft; the cam assembly comprises a plurality of cams which are stacked and rotationally fixed on the mounting shaft section, two adjacent cams are aligned to form accommodating concave parts, the two accommodating concave parts surround to form accommodating cavities, the accommodating cavities are internally provided with plug-in parts in an adapting way, and the cams are used for being abutted to corresponding sliding frames so as to drive corresponding shifting forks or parking pawls to act through the sliding frames; the locking assembly is arranged at the tail end of the mounting shaft section and used for propping the cams against the shaft shoulder. The problems of low utilization rate of a driving motor and large size of a transmission in the existing electric drive gear shifting and parking executing mechanism are solved.

Description

Cam driving structure, gear shifting and parking integrated actuating mechanism and gearbox

Technical Field

The utility model relates to the technical field of gear shifting and parking of gearboxes, in particular to a cam driving structure, a gear shifting and parking integrated actuating mechanism and a gearbox.

Background

Along with the expansion of new energy technology in the automobile field, the gearbox is also mature gradually, and the hybrid gearbox is also driven by electricity step by step due to the intervention of electric energy, and at present, the electric drive gear shifting technology mainly controls the operation of a gear shifting mechanism and a parking mechanism through two motors respectively so as to execute the operation of gear shifting and parking respectively, and the gear shifting mechanism is limited to the gear shifting of a single gear, so that the utilization rate of a driving motor is lower, the whole size and the weight of the gearbox are larger, and the layout and the light weight of the gearbox are not facilitated.

Disclosure of Invention

The utility model mainly aims to provide a gear shifting and parking integrated actuating mechanism and a gearbox, and aims to solve the problems of low utilization rate of a driving motor and large integral size of the gearbox caused by separate execution of the existing electric drive gear shifting and parking actuating mechanism.

In order to achieve the above object, the present utility model provides a cam driving structure for a gear shifting and parking integrated actuator, the gear shifting and parking integrated actuator includes a parking pawl, a plurality of gear shifting forks and a plurality of carriages movably disposed, each carriage is respectively in transmission connection with a corresponding gear shifting fork or parking pawl, the cam driving structure includes:

the base is provided with a driving rotating shaft in a rotating way along the axis of the first direction, and the driving rotating shaft is provided with a shaft shoulder and a mounting shaft section;

the cam assembly comprises a plurality of cams which are stacked along a first direction and are arranged on the mounting shaft section in a rotation-stopping way, two adjacent cams are respectively aligned to form accommodating concave parts, two accommodating concave parts surround to form accommodating cavities, plug-in parts are adaptively arranged in the accommodating cavities, and the cams are used for being abutted to corresponding sliding frames so as to drive the corresponding shifting fork or parking pawl to act through the sliding frames; the method comprises the steps of,

the locking assembly is arranged at the tail end of the mounting shaft section and used for propping the cams against the shaft shoulders.

Optionally, each cam is formed with a mounting hole penetrating along a first direction, the mounting holes on the cams are aligned and communicated to form a mounting through hole, and a spline groove is formed on the inner wall of the mounting through hole;

the mounting shaft section includes a spline shaft that is adapted to connect with a spline groove of each of the cams.

Optionally, the locking assembly comprises a locking end cap connected to the mounting shaft section by a threaded connection to abut the cam at the end.

Optionally, the plurality of cams include a first cam located at an end portion, a mounting groove corresponding to the mounting hole is further formed in an end face of the first cam, and the locking end cover is accommodated in the mounting groove.

Optionally, a screwing groove penetrating in the first direction is formed on a circumferential side surface of the locking end cap.

Optionally, a first threaded hole is formed on the end face of the mounting shaft section, a second threaded hole is further formed on the bottom wall of the first threaded hole, and the threads on the first threaded hole and the second threaded hole are opposite in rotation direction;

the locking end cover is provided with a threaded column connected to the first threaded hole and a communication hole penetrating through the threaded column, the communication hole is aligned to the second threaded hole, and the threaded column is connected to the first threaded hole in an adapting mode;

the locking assembly further includes a locking bolt passing through the communication hole and adapted to be connected to the second threaded hole.

Optionally, the locking bolt comprises a socket head cap bolt.

Optionally, the accommodating cavity and the plug-in parts are in one-to-one correspondence to form plug-in groups, and the plug-in groups are provided with a plurality of groups and are distributed along the circumferential direction of the cam.

The gear shifting and parking integrated executing mechanism provided by the utility model comprises the following components:

the mounting seat is provided with a plurality of guide rods which extend along the second direction in parallel;

in the cam driving structure, the base is arranged on the mounting seat;

the sliding frame assembly comprises a plurality of sliding frames which are respectively arranged on the periphery sides of the cams in a surrounding mode, and each sliding frame is respectively arranged on the guide rod; the method comprises the steps of,

the execution assembly comprises a parking pawl and a plurality of shifting forks, the parking pawl is arranged on the mounting seat and is connected to one of the carriages in a transmission manner, and the plurality of shifting forks are respectively arranged on the rest of the carriages;

the second direction is perpendicular to the first direction.

The gearbox provided by the utility model comprises the gear shifting and parking integrated actuating mechanism.

According to the technical scheme provided by the utility model, the cams are coaxially arranged on one driving rotating shaft, one driving motor can be adopted to drive the driving rotating shaft to rotate, on the rotating stroke of the driving rotating shaft, each cam can sequentially push and drive the corresponding sliding frame, and the parking pawl or the gear shifting fork is sequentially driven to act through the corresponding sliding frame, so that gear switching is realized, the utilization rate of the driving motor is greatly improved, the volume and the weight of the gearbox are reduced, and the layout and the light weight of the gearbox are facilitated; moreover, because the cam component is not integrally formed, but is formed by stacking a plurality of cams, the single cam can be manufactured by adopting a powder metallurgy process, the production efficiency is high, the cost is low, after the cams are produced and formed, two accommodating concave parts can be connected through the plug-in parts, so that the two cams are connected in series, the cams are finally connected into a whole, in the process that the single cam pushes the sliding frame, the acting force born by the single cam is transmitted to the cams through the plug-in parts, the stress is prevented from acting on one point on the driving rotating shaft in a concentrated way, and the size requirement on the driving rotating shaft is reduced; moreover, because the setting of locking subassembly can play a plurality of the locking purpose of cam for a plurality of the cam with the cooperation mode of installation axle section can adopt clearance fit, has reduced the dismouting degree of difficulty.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of an integrated shift and park actuator provided by the present utility model;

FIG. 2 is a schematic view of the cam driving structure and the carriage in FIG. 1;

FIG. 3 is a schematic view of the cam driving structure of FIG. 2 from another perspective;

FIG. 4 is an exploded view of the cam drive structure of FIG. 3;

FIG. 5 is an exploded view of the drive shaft and locking assembly of FIG. 4;

fig. 6 is a schematic structural view of the section A-A in fig. 2.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Cam driving structure	32	Locking bolt
1	Base seat	4	Driving rotating shaft
				2	Cam assembly	41	Shaft shoulder
21	Cam	42	Mounting shaft section
				211	Accommodating recess	421	Spline shaft
212	Mounting hole	422	First threaded hole
				213	Spline groove	423	Second threaded hole
22	Plug-in part	1000	Gear shifting and parking integrated actuating mechanism
				3	Locking assembly	200	Sliding frame
31	Locking end cover	300	Parking pawl
				311	Screw thread post	400	Shifting fork
312	Communication hole	500	Guide rod
				313	Screwing groove

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the case where a directional instruction is involved in the embodiment of the present utility model, the directional instruction is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional instruction is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In traditional automobiles, gear shifting operation is usually carried out manually, a manual gear shifting mechanism of a gearbox generally needs a plurality of structures to realize gear selection and gear shifting, the structure is complex, the cost is high, the requirement on the reliability of parts is high, meanwhile, under extreme working conditions, such as when a half slope is parked, the P gear is large, and the problems of sliding, manual parking delay and even incapability of parking and the like are easy to occur. Along with the expansion of new energy technology in the automobile field, the gearbox is also mature gradually, and the hybrid gearbox is also driven by electricity step by step due to the intervention of electric energy, and at present, the electric drive gear shifting technology mainly controls the operation of a gear shifting mechanism and a parking mechanism through two motors respectively so as to execute the operation of gear shifting and parking respectively, and the gear shifting mechanism is limited to the gear shifting of a single gear, so that the utilization rate of a driving motor is lower, the whole size and the weight of the gearbox are larger, and the layout and the light weight of the gearbox are not facilitated.

In view of the above, the utility model provides a gear shifting and parking integrated actuating mechanism and a gearbox, and aims to solve the problems of low utilization rate of a driving motor and large integral size of the gearbox caused by separate execution of the existing electrically driven gear shifting and parking actuating mechanism. Fig. 1 to fig. 6 are schematic structural views of an embodiment of a gear shifting and parking integrated actuator provided by the present utility model.

Referring to fig. 1 to 6, the cam driving structure 100 is configured for a gear shifting and parking integrated actuator 1000, the gear shifting and parking integrated actuator 1000 includes a parking pawl 300, a plurality of gear shifting forks 400, and a plurality of carriages 200 movably disposed, each carriage 200 is respectively connected to a corresponding gear shifting fork 400 or the parking pawl 300 in a transmission manner, the cam driving structure 100 includes a base 1, a cam assembly 2, and a locking assembly 3, a driving rotating shaft 4 is rotatably disposed on the base 1 along an axis where the base is located in a first direction, and the driving rotating shaft 4 is formed with a shaft shoulder 41 and a mounting shaft section 42; the cam assembly 2 comprises a plurality of cams 21 stacked along a first direction and arranged on the mounting shaft section 42 in a rotation stopping manner, two adjacent cams 21 are respectively formed with accommodating concave parts 211 in an aligned manner, two accommodating concave parts 211 are surrounded to form accommodating cavities, plug-in parts 22 are adaptively arranged in the accommodating cavities, and the cams 21 are used for being abutted to corresponding carriages 200 so as to drive corresponding shift forks 400 or parking pawls 300 to act through the carriages 200; the locking assembly 3 is disposed at the end of the mounting shaft section 42 for abutting the plurality of cams 21 against the shoulder 41.

In the technical scheme provided by the utility model, the cams 21 are coaxially arranged on one driving rotating shaft 4, one driving motor can be adopted to drive the driving rotating shaft 4 to rotate, on the rotating stroke of the driving rotating shaft 4, each cam 21 can sequentially push and drive the corresponding sliding frame 200, and the parking pawl 300 or the gear shifting fork 400 is sequentially driven to act through the corresponding sliding frame 200, so that the gear switching is realized, the utilization rate of the driving motor is greatly improved, the volume and the weight of a gearbox are reduced, and the layout and the light weight of the gearbox are facilitated; moreover, because the cam assembly 2 is not integrally formed, but is formed by stacking a plurality of cams 21, the single cam 21 can be manufactured by adopting a powder metallurgy process, the production efficiency is high, the cost is low, after the cams 21 are produced and formed, two accommodating concave parts 211 can be connected through the plug-in parts 22, so that the two cams 21 are connected in series, the cams 21 are finally connected into a whole, in the process that the single cam 21 pushes the carriage 200, the acting force born by the single cam 21 can be transmitted to the cams 21 through the plug-in parts 22, so that stress concentration on one point on the driving rotating shaft 4 is avoided, and the size requirement on the driving rotating shaft 4 is reduced; moreover, due to the arrangement of the locking assembly 3, the purpose of locking a plurality of cams 21 can be achieved, so that the fit mode of the cams 21 and the mounting shaft section 42 can be in clearance fit, and the disassembly and assembly difficulty is reduced.

It should be noted that the form of the driving connection of the carriage 200 to the parking pawl 300 or the shift fork 400 may be various, and this embodiment will not be described in detail.

In the present embodiment, referring to fig. 4 and fig. 5, each of the cams 21 is formed with a mounting hole 212 penetrating along the first direction, the mounting holes 212 on the cams 21 are aligned and communicated to form a mounting through hole, and a spline groove 213 is formed on an inner wall of the mounting through hole; the mounting shaft section 42 includes a spline shaft 421, and the spline shaft 421 is fittingly connected to the spline grooves 213 of the respective cams 21. The spline connection has the advantages that the total contact area of the cam 21 and the spline shaft 421 is large, the stress is uniform, the root stress concentration is small, the larger external load can be borne, the spline shaft 421 has high centering precision on the cam 21, and accurate gear switching can be ensured.

There are many types of structures of the locking assembly 3, for example, a plug may be tightly inserted onto the end of the mounting shaft section 42 while abutting against the cam 21, but this has a problem of difficulty in disassembly, and in this embodiment, the locking assembly 3 includes a locking end cap 31, and the locking end cap 31 is connected to the mounting shaft section 42 by a screw connection structure to abut against the cam 21 at the end. The locking end cover 31 is connected with the mounting shaft section 42 through the threaded connection structure, so that the locking end cover 31 can be effectively prevented from accidentally falling off, and the locking end cover 31 can be conveniently and rapidly detached.

In order to reduce the occupation of the locking end cap 31 to the external space, in this embodiment, the plurality of cams 21 includes a first cam located at an end portion, and a mounting groove corresponding to the mounting hole 212 is further formed on an end surface of the first cam, and the locking end cap 31 is accommodated in the mounting groove. The locking end cover 31 can be accommodated through the mounting groove, so that the locking end cover 31 is prevented from occupying an external space, and the axial size of the cam driving structure 100 is reduced.

Since the locking end cap 31 needs to be screwed into the mounting groove, in order to ensure that the locking end cap 31 can be screwed, in this embodiment, a screwing groove 313 penetrating in the first direction is formed on the circumferential side surface of the locking end cap 31. By the screwing grooves 313, a continuous point of application of the external force can be provided, and even if the locking end cap 31 is in the mounting groove, the external force can act on the locking end cap 31 through the screwing grooves 313, thereby ensuring locking of the locking end cap 31.

The locking end cover 31 abuts against the cam 21 through a threaded connection structure, but after long-time operation, the problem of overturning and loosening of the locking end cover 31 may occur, in order to avoid misalignment between the cam 21 and the carriage 200 caused by loosening of the locking end cover 31, in this embodiment, a first threaded hole 422 is formed on an end surface of the mounting shaft section 42, a second threaded hole 423 is further formed on a bottom wall of the first threaded hole 422, and threads on the first threaded hole 422 and the second threaded hole 423 are in opposite screwing directions; the locking end cap 31 is formed with a screw post 311 connected to the first screw hole 422, and a communication hole 312 penetrating through the screw post 311, and the communication hole 312 is aligned to the second screw hole 423, the screw post 311 being adapted to be connected to the first screw hole 422; the locking assembly 3 further comprises a locking bolt 32, said locking bolt 32 passing through said communication hole 312 and being adapted to be connected to said second threaded hole 423. Because the first thread and the second thread have opposite rotation directions, after the locking bolt 32 and the locking end cover 31 are simultaneously screwed to the mounting shaft section 42, the locking bolt 32 can play a role in restricting the reverse rotation of the locking end cover, so that the locking end cover 31 can be effectively prevented from loosening, and the safety and reliability of long-term use are ensured.

The locking bolt 32 generally includes an inner hexagonal bolt and an outer hexagonal bolt, and specifically, the locking bolt 32 includes an inner hexagonal bolt.

In order to alleviate the connection pressure of the single plugging portion 22, please refer to fig. 4, in this embodiment, the accommodating cavities and the plugging portions 22 are in one-to-one correspondence to form plugging groups, and the plugging groups are provided with multiple groups and are distributed along the circumferential direction of the cams 21. The arrangement of a plurality of groups of the plug-in groups can uniformly spread the transmission torsion between the two cams 21, reduce the size requirement on the single plug-in part 22, and simultaneously can increase the connection stability between the two cams 21.

The gear shifting and parking integrated actuating mechanism 1000 provided by the utility model comprises a mounting seat, the cam driving structure 100, a sliding frame 200 assembly and an actuating assembly, wherein a plurality of guide rods 500 extending along a second direction are arranged on the mounting seat in parallel; the base 1 of the cam driving structure 100 is arranged on the mounting seat; the carriage 200 assembly includes a plurality of carriages 200 respectively surrounding the periphery of the cams 21, and each carriage 200 is respectively arranged on the guide rod 500; the execution assembly comprises a parking pawl 300 and a plurality of shift forks 400, the parking pawl 300 is arranged on the mounting seat and is connected to one of the carriages 200 in a transmission manner, and the plurality of shift forks 400 are respectively arranged on the rest of the carriages 200; the second direction is perpendicular to the first direction.

By means of the rotation of the drive shaft section, the corresponding carriage 200 can be driven to move on the guide rod 500 by the corresponding cam 21, so that the corresponding parking carriage 200 or the shift fork 400 can be driven, wherein the guide rod 500 moves in a second direction perpendicular to the first direction, so that the carriage 200 can be limited to slide in the second direction, and the shift fork 400 is arranged on the carriage 200, so that it can be understood that the second direction is an axial direction of the gearbox gear shaft system, and it is to be interpreted that the transmission connection manner between the parking pawl 300 and the carriage 200 is various, so long as the linear movement of the carriage 200 in the second direction can be converted into the rotation of the parking pawl 300 along the axis in the second direction, which is not limited in the embodiment. The specific structure of the cam driving structure 100 refers to the above embodiments, and since the cam driving structure 100 adopts all the technical solutions of all the embodiments, at least all the beneficial effects caused by all the technical solutions of all the embodiments are provided, and will not be described in detail herein.

The gearbox provided by the utility model comprises the gear shifting and parking integrated executing mechanism 1000, and the specific structure of the gear shifting and parking integrated executing mechanism 1000 refers to the embodiment, and as the gear shifting and parking integrated executing mechanism 1000 adopts all the technical schemes of all the embodiments, at least all the beneficial effects brought by all the technical schemes of all the embodiments are provided, and are not repeated herein.

In a specific embodiment, the gearbox includes a longitudinal hybrid gearbox, generally, the longitudinal hybrid gearbox has a large volume, and the gear shifting and parking integrated actuator 1000 is disposed in the longitudinal hybrid gearbox, so that the overall volume of the longitudinal hybrid gearbox can be effectively reduced.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the specification and drawings of the present utility model or direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims (10)

1. A cam drive structure for shift and integrated actuating mechanism of parking, shift and integrated actuating mechanism of parking includes parking pawl, a plurality of shift fork and is a plurality of carriages that the activity set up, each the carriage is respectively the transmission is connected to corresponding shift fork or the parking pawl, its characterized in that, cam drive structure includes:

the base is provided with a driving rotating shaft in a rotating way along the axis of the first direction, and the driving rotating shaft is provided with a shaft shoulder and a mounting shaft section;

the cam assembly comprises a plurality of cams which are stacked along a first direction and are arranged on the mounting shaft section in a rotation-stopping way, two adjacent cams are respectively aligned to form accommodating concave parts, two accommodating concave parts surround to form accommodating cavities, plug-in parts are adaptively arranged in the accommodating cavities, and the cams are used for being abutted to corresponding sliding frames so as to drive the corresponding shifting fork or parking pawl to act through the sliding frames; the method comprises the steps of,

the locking assembly is arranged at the tail end of the mounting shaft section and used for propping the cams against the shaft shoulders.

2. The cam driving structure according to claim 1, wherein each of the cams is formed with a mounting hole penetrating in a first direction, the mounting holes of the plurality of cams are aligned and communicated to form a mounting through hole, and a spline groove is formed on an inner wall of the mounting through hole;

the mounting shaft section includes a spline shaft that is adapted to connect with a spline groove of each of the cams.

3. The cam driven structure of claim 2 wherein said locking assembly includes a locking end cap connected to said mounting shaft section by a threaded connection to abut said cam at the end.

4. The cam driving structure according to claim 3, wherein the plurality of cams includes a first cam at an end portion, a mounting groove corresponding to the mounting hole is further formed in an end surface of the first cam, and the locking end cap is accommodated in the mounting groove.

5. The cam driving structure according to claim 4, wherein a screwing groove penetrating in the first direction is formed on a peripheral side surface of the locking end cap.

6. A cam driving structure according to claim 3, wherein the end face of the mounting shaft section is formed with a first threaded hole, and a second threaded hole is formed in the bottom wall of the first threaded hole, and the first threaded hole is in opposite rotation to the threads on the second threaded hole;

the locking end cover is provided with a threaded column connected to the first threaded hole and a communication hole penetrating through the threaded column, the communication hole is aligned to the second threaded hole, and the threaded column is connected to the first threaded hole in an adapting mode;

the locking assembly further includes a locking bolt passing through the communication hole and adapted to be connected to the second threaded hole.

7. The cam drive structure of claim 6 wherein the lock bolt comprises a socket head cap bolt.

8. The cam driving structure according to claim 1, wherein the receiving cavities and the insertion portions are formed in one-to-one correspondence to form insertion groups, and the insertion groups are arranged in a plurality of groups and distributed along the circumferential direction of the cam.

9. An integrated shift and park actuator comprising:

the mounting seat is provided with a plurality of guide rods which extend along the second direction in parallel;

the cam driving structure according to any one of claims 1 to 8, wherein the base is provided to the mount;

the sliding frame assembly comprises a plurality of sliding frames which are respectively arranged on the periphery sides of the cams in a surrounding mode, and each sliding frame is respectively arranged on the guide rod; the method comprises the steps of,

the execution assembly comprises a parking pawl and a plurality of shifting forks, the parking pawl is arranged on the mounting seat and is connected to one of the carriages in a transmission manner, and the plurality of shifting forks are respectively arranged on the rest of the carriages;

the second direction is perpendicular to the first direction.

10. A transmission comprising the integrated shift and park actuator of claim 9.