CN114294382A - Gear shifting mechanism of gearbox and gearbox - Google Patents

Abstract

The application discloses gearshift and gearbox of gearbox belongs to mechanical technical field. The shift mechanism includes: the movable gear and the gear shifting tooth device are coaxially arranged; a gear shifting tooth and a gear shifting tooth fixing groove which are meshed with each other are formed between the movable gear and the gear shifting tooth device; at least one smooth convex part is formed in the gear shifting tooth fixing groove. According to the technical scheme, by means of the smooth protruding portion between the gear shifting device and the movable gear, in the process that the original gear of the gearbox is switched to the target gear, the gear shifting device of the original gear and the movable gear of the original gear can be automatically separated, the gear shifting device of the original gear and the movable gear of the original gear do not need to be separated through related components, the hardware structure of the gear shifting mechanism is simplified, and hardware cost is reduced.

Description

Gear shifting mechanism of gearbox and gearbox

The application is a divisional application of an invention patent application with the application number of 201910579798.2 and the name of 'a gear shifting mechanism of a gearbox and the gearbox' which is filed on 28.06.2019.

Technical Field

The embodiment of the application relates to the technical field of machinery, in particular to a gear shifting mechanism of a gearbox and the gearbox.

Background

The gearbox is a very important part on the automobile, can change the transmission ratio, and expand the change range of the torque and the rotating speed of the driving wheel so as to adapt to the frequently changing running conditions, and simultaneously, the transmitter can work under the favorable working condition (higher power and lower oil consumption).

Gearboxes are usually provided with a number of different gears to output different gear ratios. The gearbox comprises a gear shifting mechanism, and switching of different gears is achieved through the gear shifting mechanism.

Disclosure of Invention

The embodiment of the application provides a gear shifting mechanism of a gearbox and the gearbox. The technical scheme is as follows:

in one aspect, an embodiment of the present application provides a gear shift mechanism of a transmission, where the gear shift mechanism includes: the movable gear and the gear shifting tooth device are coaxially arranged;

a gear shifting tooth and a gear shifting tooth fixing groove which are meshed with each other are formed between the movable gear and the gear shifting tooth device;

at least one smooth convex part is formed in the gear shifting tooth fixing groove.

Optionally, the shift tooth fixing groove is annular, at least two fixing teeth matched with the shift tooth exist in the shift tooth fixing groove, and the smooth protruding portion is formed between every two adjacent fixing teeth.

Optionally, the smooth convex part is positioned at the middle position of two adjacent fixed teeth.

Optionally, the shifting gear device comprises a shifting gear base arranged on the shaft, and a shifting gear connected with the shifting gear base through a spline;

and a gear shifting tooth fixing groove corresponding to the gear shifting tooth is formed on the side edge of the movable gear.

Optionally, the shifting gear device comprises a shifting gear base arranged on the shaft, and a shifting gear fixing groove connected with the shifting gear base through a spline;

and gear shifting teeth corresponding to the gear shifting tooth fixing grooves are formed on the side edges of the movable gears.

Optionally, a first limit groove is formed on the gear shifting tooth base, and a second limit groove corresponding to the first limit groove is formed on the gear shifting tooth or the gear shifting tooth fixing groove;

an elastic part and a steel ball positioned at the top of the elastic part are arranged in the first limiting groove;

under the condition that the movable gear and the gear shifting device are in a separated state, one part of the steel ball is positioned in the first limiting groove, and the other part of the steel ball is positioned in the second limiting groove.

Optionally, the number of the first limiting grooves is multiple, and the multiple first limiting grooves are uniformly distributed on the gear shifting tooth base around the shaft.

Optionally, the height of the smooth convex part is the same as the groove depth of the shift tooth fixing groove.

Optionally, the gear shift mechanism further comprises an electromagnetic fork, the electromagnetic fork comprising: the device comprises a shell, a first fixed block, a second fixed block, a movable block and a shifting fork piece, wherein the first fixed block, the second fixed block and the movable block are arranged in the shell;

the positions of the first fixed block and the second fixed block are fixed;

the movable block is positioned between the first fixed block and the second fixed block, and the movable block is electromagnetically coupled with the first fixed block and the second fixed block respectively;

one end of the shifting fork piece is connected with the movable block, and the other end of the shifting fork piece is connected with the gear shifting tooth device.

In another aspect, an embodiment of the present application provides a transmission including the gear shift mechanism according to the above aspect.

The technical scheme provided by the embodiment of the application can bring the following beneficial effects:

according to the technical scheme, by means of the smooth protruding portion between the gear shifting device and the movable gear, in the process that the original gear of the gearbox is switched to the target gear, the gear shifting device of the original gear and the movable gear of the original gear can be automatically separated, the gear shifting device of the original gear and the movable gear of the original gear do not need to be separated through related components, the hardware structure of the gear shifting mechanism is simplified, and hardware cost is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic illustration of a shift mechanism of a transmission provided in accordance with an embodiment of the present application;

FIG. 2 is a schematic view of a shift tooth retaining groove provided in an embodiment of the present application;

FIG. 3 is a schematic view of a shift tooth and a shift tooth retaining groove provided in accordance with an embodiment of the present application;

FIG. 4 is a schematic illustration of a shift mechanism for a transmission provided in accordance with another embodiment of the present application;

FIG. 5 is a schematic view of an electromagnetic fork provided in accordance with an embodiment of the present application;

FIG. 6 is a schematic view of an electromagnetic fork according to another embodiment of the present application;

FIG. 7 is a schematic view of an electromagnetic fork according to another embodiment of the present application;

FIG. 8 is a schematic structural diagram of a transmission provided in an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Referring to FIG. 1, a schematic diagram of a shift mechanism for a transmission provided in an embodiment of the present application is shown. The shift mechanism may include: a movable gear 18 and a gear shift tooth arrangement 19 arranged coaxially.

The loose gear 18 and the gear shift arrangement 19 are arranged on the same shaft 30. The loose gear 18 is a gear movably connected with the shaft 30, the relative position between the loose gear 18 and the shaft 30 is not fixed, and the loose gear 18 can rotate around the shaft 30 on which the loose gear 18 is arranged. The shifting tooth device 19 is movably connected with the shaft 30, the shifting tooth device 19 can move along the direction of the shaft 30 (namely, the direction A shown in figure 1), but the shifting tooth device 19 cannot rotate around the shaft 30 on which the shifting tooth device is arranged. Alternatively, the shift tooth arrangement 19 is splined to the shaft 30.

A gear shifting tooth 20 and a gear shifting tooth fixing groove 21 which are meshed with each other are formed between the movable gear 18 and the gear shifting tooth device 19. By adjusting the position of the shifting tooth arrangement 19 on the shaft 30, the movable gear 18 and the shifting tooth arrangement 19 can be engaged, i.e. the shifting teeth 20 and the shifting tooth fixing grooves 21 are engaged; or to separate the loose gear 18 from the shifting tooth arrangement 19, i.e. to separate the shifting teeth 20 from the shifting tooth securing slots 21.

Referring to fig. 2 and 3 in combination, at least one smooth protrusion 212 is formed in the shift tooth fixing groove 21.

In the embodiment of the present application, the shift tooth fixing groove 21 has a ring shape, at least two fixing teeth 211 matched with the shift tooth 20 are located in the shift tooth fixing groove 21, and a smooth convex portion 212 is formed between two adjacent fixing teeth 211.

Alternatively, the smooth protrusions 212 are located at the middle position of the adjacent two fixed teeth 211.

Alternatively, the height of the smooth protrusion 212 is the same as the groove depth of the shift tooth fixing groove 21.

In a first possible implementation, as shown in fig. 1, the shift tooth device 19 includes a shift tooth base 191 provided on the shaft 30, and a shift tooth 20 splined to the shift tooth base 191; a shift tooth fixing groove 21 corresponding to the shift tooth 20 is formed at a side of the movable gear 18.

In a second possible implementation, the shift tooth device 19 includes a shift tooth base 191 provided on the shaft 30, and a shift tooth fixing groove 21 splined to the shift tooth base 191; a side of the movable gear 18 is formed with a shift tooth 20 corresponding to the shift tooth fixing groove 21.

The shift tooth base 191 may be integrally formed with the shaft 30 or may be fixedly provided to the shaft 30.

In an exemplary embodiment, as shown in fig. 1, a first stopper groove is formed on the shift tooth base 191, and a second stopper groove corresponding to the first stopper groove is formed on the shift tooth 20 or the shift tooth fixing groove 21; an elastic part and a steel ball positioned at the top of the elastic part are arranged in the first limiting groove; with the loose gear 18 and the shifting tooth arrangement 19 in a disengaged state, a part of the steel balls is located in the first limit groove and another part is located in the second limit groove. Optionally, the resilient member is a spring or other resilient member. In the embodiment of the present application, the number of the first limiting grooves is not limited, and optionally, the number of the first limiting grooves is plural, the plural first limiting grooves are uniformly distributed on the gear shift base 191 around the shaft 30, and the number of the second limiting grooves is the same as the number of the first limiting grooves.

Corresponding to the first possible implementation manner, since the shifting tooth base 191 and the shifting tooth 20 are connected by the spline, a second limit groove corresponding to the first limit groove is formed on the shifting tooth 20. Corresponding to the second possible implementation manner, since the shifting tooth base 191 is connected to the shifting tooth fixing groove 21 by the spline, a second limit groove corresponding to the first limit groove is formed on the shifting tooth fixing groove 21.

In this way, in the case where the shift tooth device 19 and the loose gear 18 are in the separated state, the position between the shift tooth 20 or the shift tooth fixing groove 21 and the shift tooth base 191 can be made more stable.

Optionally, as shown in fig. 4, the shift mechanism further includes an electromagnetic fork 24, and the electromagnetic fork 24 includes: the locking mechanism includes a housing 241, a first fixed block 242, a second fixed block 243 and a movable block 244 provided in the housing 241, and a fork 245 connected to the movable block 244. The positions of the first and second fixing blocks 242 and 243 are fixed. The movable block 244 is located between the first fixed block 242 and the second fixed block 243, and the movable block 244 is electromagnetically coupled to the first fixed block 242 and the second fixed block 243, respectively. The fork 245 is connected at one end to the movable block 244 and at the other end to the gear shift tooth arrangement 19.

In one example, as shown in fig. 5, the first and second fixed blocks 242 and 243 are magnets having the same magnetic property, and the movable block 244 is an electromagnet. In another example, as shown in fig. 6, the first and second fixed blocks 242 and 243 are electromagnets, and the movable block 244 is a magnetic metal material. The magnetic metal material is a material that can be attracted by a magnet, such as iron, nickel, cobalt, and the like. In another example, as shown in fig. 7, the first and second fixed blocks 242 and 243 are electromagnets, and the movable block 244 is also an electromagnet.

In the embodiment of the present application, the shift fork 245 is driven to move by the electromagnetic control, and then the shift fork 245 drives the shift tooth device 19 to move, so that the efficient shift control can be realized.

Alternatively, between the movable block 244 and the first and second fixed blocks 242 and 243, elastic members, such as springs, are disposed, respectively. Thus, when there is no magnetic force between the movable block 244 and the first and second fixed blocks 242 and 243, the movable block 244 can be rapidly controlled by the elastic member to be reset.

Optionally, a limit baffle is arranged between the movable block 244 and the side edge of the shell 241; the movable block 244 is formed with the bellying with the relative one side of limit baffle, and the last concave part that is formed with the bellying adaptation of limit baffle. Thus, in the reset state of the movable block 244, the protrusion of the movable block 244 is located in the groove portion, so that the position of the movable block 244 is more stable.

In summary, in the technical scheme provided by the embodiment of the application, by means of the smooth protruding portion between the shifting tooth device and the movable gear, in the process of switching the transmission from the original gear to the target gear, the shifting tooth device of the original gear and the movable gear of the original gear can be automatically separated, and the shifting tooth device of the original gear and the movable gear of the original gear do not need to be separated through related components, so that the hardware structure of the shifting mechanism is simplified, and the hardware cost is reduced.

An exemplary embodiment of the present application also provides a transmission including the shift mechanism provided in the above embodiment. The gearbox can be any type such as a manual gearbox, an automatic gearbox, a double-clutch gearbox and the like, and the embodiment of the application is not limited to the above.

Referring to fig. 8, a schematic structural diagram of a transmission 1 according to an embodiment of the present application is shown. The gearbox 1 may comprise: an outer clutch 11, an inner clutch 12, an outer input shaft 13, an inner input shaft 14, and an output shaft 15.

The gearbox 1 provided by the embodiment of the application is a double-clutch gearbox, and the gearbox 1 comprises an outer clutch 11 and an inner clutch 12. In the embodiment of the present application, the type of the clutch is not limited, and may be, for example, a hydraulic clutch, an electromagnetic clutch, or the like.

The outer input shaft 13 and the inner input shaft 14 are coaxially arranged. As shown in fig. 8, the outer input shaft 13 is fitted to the outside of one end of the inner input shaft 14.

The outer clutch 11 is connected to the inner input shaft 14, and the inner clutch 12 is connected to the outer input shaft 13. The outer clutch 11 is used to power the inner input shaft 14 and the inner clutch 12 is used to power the outer input shaft 13.

The outer input shaft 13 and the inner input shaft 14 are provided with input gears of respective gears, and the output shaft 15 is provided with output gears of respective gears meshed with the input gears. In the present embodiment, the gearbox 1 comprises a plurality of (at least two) gears. In fig. 8, the gearbox 1 is schematically illustrated with 1 to 9 gears and a reverse gear, for a total of 10 gears. The gears on the input shafts (including the outer input shaft 13 and the inner input shaft 14) are referred to as input gears, and the gears on the output shaft 15 are referred to as output gears. Each gear comprises an input gear and an output gear. For gears 1 to 9, the input gear and the output gear are directly meshed; for reverse gear, the input gear and the output gear are indirectly engaged, and a reverse gear is arranged between the input gear and the output gear.

In the present embodiment, as shown in fig. 8, the inner input shaft 14 realizes odd-numbered gears, i.e., 1, 3, 5, 7, and 9; the outer input shaft 13 realizes even-numbered gears and reverse gears, i.e., 2, 4, 6, 8, and R (i.e., reverse).

In the embodiment of the present application, the input gear includes both types of a fixed gear and a movable gear, and the output gear also includes both types of a fixed gear and a movable gear. In fig. 8, the fixed gear is shown at 17 and the loose gear is shown at 18. The loose gear 18 is correspondingly provided with a shifting tooth device 19. The fixed gear 17 means a gear directly formed on or fixedly connected with the shaft, and the relative position between the fixed gear 17 and the shaft is fixed. The movable gear 18 is a gear movably connected with the shaft, the relative position between the movable gear 18 and the shaft is not fixed, and the movable gear 18 can rotate around the shaft.

In the embodiment of the application, the shifting mechanism of the gearbox 1 comprises a loose gear 18 and a shifting tooth arrangement 19, as shown in fig. 8. A shift tooth 20 and a shift tooth fixing groove 21 are formed between the movable gear 18 and the shift tooth device 19, and at least one smooth convex part is formed in the shift tooth fixing groove 21. For the description of the shifting mechanism, reference may be made to the above embodiments, which are not described in detail herein.

In the first operating state, the outer clutch 11 drives the inner input shaft 14 to rotate, the inner input shaft 14 drives the input gear of the first gear on the inner input shaft 14 to rotate, the input gear of the first gear drives the output gear of the first gear on the output shaft 15 to rotate, and the output gear of the first gear drives the output shaft 15 to rotate.

In the second working state, the inner clutch 12 drives the outer input shaft 13 to rotate, the outer input shaft 13 drives the input gear of the second gear on the outer input shaft 13 to rotate, the input gear of the second gear drives the output gear of the second gear on the output shaft 15 to rotate, and the output gear of the second gear drives the output shaft 15 to rotate.

Taking the case that the transmission 1 operates in the 1-gear position as an example, at this time, the transmission 1 is in the first operating state, the outer clutch 11 drives the inner input shaft 14 to rotate, the inner input shaft 14 drives the input gear of the 1-gear position on the inner input shaft 14 to rotate, the input gear of the 1-gear position drives the output gear of the 1-gear position on the output shaft 15 to rotate, and the output gear of the 1-gear position drives the output shaft 15 to rotate.

Taking the case that the transmission 1 operates at the gear 2, at this time, the transmission 1 is in the second operating state, the inner clutch 12 drives the outer input shaft 13 to rotate, the outer input shaft 13 drives the input gear of the gear 2 on the outer input shaft 13 to rotate, the input gear of the gear 2 drives the output gear of the gear 2 on the output shaft 15 to rotate, and the output gear of the gear 2 drives the output shaft 15 to rotate.

During the shift from the first operating state to the second operating state, the shifting tooth arrangement 19 of the second gear meshes with the loose gear 18 of the second gear, the inner clutch 12 engages, and after the inner clutch 12 engages, the outer clutch 11 disengages.

During the shift from the second operating state to the first operating state, the shifting tooth arrangement 19 of the first gear meshes with the loose gear 18 of the first gear, the outer clutch 11 is engaged, and after the engagement of the outer clutch 11, the inner clutch 12 is disengaged.

Next, a description will be given of a shift range switching process, taking an upshift process from 1 st gear to 2 nd gear as an example:

when the transmission 1 is in the 1-gear working state, the outer clutch 11 is in the engaged state, and the inner clutch 12 is in the disengaged state. As shown in fig. 8, since the shift gear device 19 of the 1 st gear is disposed beside the output gear of the 1 st gear, the shift gear device 19 of the 1 st gear meshes with the output gear of the 1 st gear. The outer clutch 11 drives the inner input shaft 14 to rotate, the inner input shaft 14 drives the input gear of the 1 st gear on the inner input shaft 14 to rotate, the input gear of the 1 st gear drives the output gear of the 1 st gear on the output shaft 15 to rotate, and the output gear of the 1 st gear is meshed with the gear shifting gear device 19 of the 1 st gear, so that the gear shifting gear device 19 of the 1 st gear drives the output shaft 15 to rotate.

During the process of shifting the transmission 1 from 1 gear to 2 gear, as shown in fig. 8, since the 2-gear shift tooth device 19 is disposed beside the 2-gear output gear, the 2-gear shift tooth device 19 is engaged with the 2-gear output gear, and at the same time or after the 2-gear shift tooth device 19 is engaged with the 2-gear output gear, the 1-gear shift tooth device 19 is disengaged from the 1-gear output gear; the inner clutch 12 is switched from the disengaged state to the engaged state, after the inner clutch 12 is engaged, the outer clutch 11 is switched from the engaged state to the disengaged state, and the transmission 1 is switched to the 2-gear operating state.

When the transmission 1 is in the 2-gear operating state, the inner clutch 12 is in the engaged state, and the outer clutch 11 is in the disengaged state. The inner clutch 12 drives the outer input shaft 13 to rotate, the outer input shaft 13 drives the input gear of the 2-gear on the outer input shaft 13 to rotate, the input gear of the 2-gear drives the output gear of the 2-gear on the output shaft 15 to rotate, and the output gear of the 2-gear is meshed with the gear shifting tooth device 19 of the 2-gear, so that the gear shifting tooth device 19 of the 2-gear drives the output shaft 15 to rotate.

In the embodiment of the present application, during the shifting of the transmission 1 from 1 gear to 2 gear, the shifting tooth device 19 of 1 gear can be automatically disengaged from the output gear of 1 gear. Specifically, after the internal clutch 12 is switched from the disengaged state to the engaged state, the internal clutch 12 drives the external input shaft 13 to rotate, the external input shaft 13 further drives the output shaft 15 to rotate, and since the rotation speeds of the shift tooth device 19 of the 1 st gear and the output gear of the 1 st gear are not the same at this time, a relative motion is generated between the shift tooth 20 of the 1 st gear and the shift tooth fixing groove 21, and since the smooth protrusion 212 exists in the shift tooth fixing groove 21, the shift tooth 20 can be pushed open by the smooth protrusion 212, so that the shift tooth 20 of the 1 st gear and the shift tooth fixing groove 21 are automatically separated, that is, the shift tooth device 19 of the 1 st gear and the output gear of the 1 st gear can be automatically separated. It is this design that enables non-delay and non-intermittent shifting by first engaging the inner clutch 12 and then disengaging the outer clutch 11 during shifting from 1 to 2.

Next, a description will be given of a shift range switching process, taking an upshift process from 2 th gear to 3 rd gear as an example:

when the transmission 1 is in the 2-gear operating state, the inner clutch 12 is in the engaged state, and the outer clutch 11 is in the disengaged state. As shown in fig. 8, since the 2 nd shift gear device 19 is disposed beside the 2 nd output gear, the 2 nd shift gear device 19 meshes with the 2 nd output gear. The inner clutch 12 drives the outer input shaft 13 to rotate, the outer input shaft 13 drives the input gear of the 2-gear on the outer input shaft 13 to rotate, the input gear of the 2-gear drives the output gear of the 2-gear on the output shaft 15 to rotate, and the output gear of the 2-gear is meshed with the gear shifting tooth device 19 of the 2-gear, so that the gear shifting tooth device 19 of the 2-gear drives the output shaft 15 to rotate.

During the process of shifting the transmission 1 from 2 to 3, as shown in fig. 8, since the 3-speed shift gear device 19 is disposed beside the 3-speed output gear, the 3-speed shift gear device 19 is engaged with the 3-speed output gear, and at the same time or after the 3-speed shift gear device 19 is engaged with the 3-speed output gear, the 2-speed shift gear device 19 is disengaged from the 2-speed output gear; the external clutch 11 is switched from the disengaged state to the engaged state, and after the external clutch 11 is engaged, the internal clutch 12 is switched from the engaged state to the disengaged state, and the transmission 1 is switched to the 3-gear operating state.

When the transmission 1 is in the 3-gear operating state, the outer clutch 11 is in the engaged state, and the inner clutch 12 is in the disengaged state. The outer clutch 11 drives the inner input shaft 14 to rotate, the inner input shaft 14 drives the input gear of 3 gears on the inner input shaft 14 to rotate, the input gear of 3 gears drives the output gear of 3 gears on the output shaft 15 to rotate, and the output gear of 3 gears is meshed with the gear shifting gear device 19 of 3 gears, so that the gear shifting gear device 19 of 3 gears drives the output shaft 15 to rotate.

In the exemplary embodiment of the present application, during a shift of the transmission 1 from 2 to 3, the 2-gear shifting tooth device 19 can be automatically disengaged from the 2-gear output gear. Specifically, after the external clutch 11 is switched from the disengaged state to the engaged state, the external clutch 11 drives the internal input shaft 14 to rotate, the internal input shaft 14 further drives the output shaft 15 to rotate, and since the rotation speeds of the shift tooth device 19 of the 2-speed gear and the output gear of the 2-speed gear are not the same at this time, a relative motion is generated between the shift tooth 20 of the 2-speed gear and the shift tooth fixing groove 21, and since the smooth protrusion 212 exists in the shift tooth fixing groove 21, the shift tooth 20 can be pushed open by the smooth protrusion 212, so that the shift tooth 20 of the 2-speed gear and the shift tooth fixing groove 21 are automatically separated, that is, the shift tooth device 19 of the 2-speed gear and the output gear of the 2-speed gear can be automatically separated. It is this design that enables non-delay and non-intermittent shifting by first engaging the outer clutch 11 and then disengaging the inner clutch 12 during shifting from 2 to 3.

Next, a description will be given of a shift range switching process by taking a downshift from 9 th gear to 4 th gear as an example:

when the transmission 1 is in the 9-gear operating state, the outer clutch 11 is in the engaged state, and the inner clutch 12 is in the disengaged state. As shown in fig. 8, since the 9 th shift gear device 19 is disposed beside the 9 th input gear, the 9 th shift gear device 19 meshes with the 9 th input gear. The outer clutch 11 drives the inner input shaft 14 to rotate, the inner input shaft 14 drives the 9-gear shifting gear device 19 on the inner input shaft 14 to rotate, the 9-gear shifting gear device 19 drives the 9-gear input gear to rotate, the 9-gear input gear drives the 9-gear output gear to rotate, and the 9-gear output gear drives the output shaft 15 to rotate.

During the process of shifting the transmission 1 from the 9 th gear to the 4 th gear, as shown in fig. 8, since the 4 th gear shift tooth device 19 is disposed beside the 4 th output gear, the 4 th gear shift tooth device 19 is engaged with the 4 th output gear, and at the same time or after the 4 th gear shift tooth device 19 is engaged with the 4 th output gear, the 9 th gear shift tooth device 19 is disengaged from the 9 th input gear; the internal clutch 12 is switched from the disengaged state to the engaged state, and after the internal clutch 12 is engaged, the external clutch 11 is switched from the engaged state to the disengaged state, and the transmission 1 is switched to the 4-gear operating state.

When the gearbox 1 is in the 4-gear working state, the inner clutch 12 is in a combined state, and the outer clutch 11 is in a separated state. The inner clutch 12 drives the outer input shaft 13 to rotate, the outer input shaft 13 drives the 4-gear input gear on the outer input shaft 13 to rotate, the 4-gear input gear drives the 4-gear output gear on the output shaft 15 to rotate, and the 4-gear output gear is meshed with the 4-gear shifting gear device 19, so that the 4-gear shifting gear device 19 drives the output shaft 15 to rotate.

In the embodiment of the present application, the 9-speed shift gear device 19 can be automatically disengaged from the 9-speed input gear during the shift of the transmission 1 from 9-speed to 4-speed. Specifically, after the internal clutch 12 is switched from the disengaged state to the engaged state, the internal clutch 12 drives the external input shaft 13 to rotate, the external input shaft 13 further drives the output shaft 15 to rotate, and since the rotation speeds of the 9 th shift tooth device 19 and the 9 th input gear are no longer the same at this time, relative motion is generated between the 9 th shift tooth 20 and the shift tooth fixing groove 21, and since the smooth protrusion 212 exists in the shift tooth fixing groove 21, the shift tooth 20 can be pushed open by the smooth protrusion 212, so that the 9 th shift tooth 20 and the shift tooth fixing groove 21 are automatically separated, that is, the 9 th shift tooth device 19 and the 9 th input gear can be automatically separated. It is this design that enables a non-time delay and non-intermittent shift to be achieved by first engaging the inner clutch 12 and then disengaging the outer clutch 11 during the shift from 9 to 4.

Next, a description will be given of a shift range switching process by taking a downshift from 4 th gear to 3 rd gear as an example:

when the gearbox 1 is in the 4-gear working state, the inner clutch 12 is in a combined state, and the outer clutch 11 is in a separated state. As shown in fig. 8, since the 4 th shift gear device 19 is disposed beside the 4 th output gear, the 4 th shift gear device 19 meshes with the 4 th output gear. The inner clutch 12 drives the outer input shaft 13 to rotate, the outer input shaft 13 drives the 4-gear input gear on the outer input shaft 13 to rotate, the 4-gear input gear drives the 4-gear output gear on the output shaft 15 to rotate, and the 4-gear output gear is meshed with the 4-gear shifting gear device 19, so that the 4-gear shifting gear device 19 drives the output shaft 15 to rotate.

During the process of shifting the transmission 1 from 4 to 3, as shown in fig. 8, since the 3-speed shift gear device 19 is disposed beside the 3-speed output gear, the 3-speed shift gear device 19 is engaged with the 3-speed output gear, and at the same time or after the 3-speed shift gear device 19 is engaged with the 3-speed output gear, the 4-speed shift gear device 19 is disengaged from the 4-speed output gear; the external clutch 11 is switched from the disengaged state to the engaged state, and after the external clutch 11 is engaged, the internal clutch 12 is switched from the engaged state to the disengaged state, and the transmission 1 is switched to the 3-gear operating state.

When the transmission 1 is in the 3-gear operating state, the outer clutch 11 is in the engaged state, and the inner clutch 12 is in the disengaged state. The outer clutch 11 drives the inner input shaft 14 to rotate, the inner input shaft 14 drives the input gear of 3 gears on the inner input shaft 14 to rotate, the input gear of 3 gears drives the output gear of 3 gears on the output shaft 15 to rotate, and the output gear of 3 gears is meshed with the gear shifting gear device 19 of 3 gears, so that the gear shifting gear device 19 of 3 gears drives the output shaft 15 to rotate.

In the embodiment of the present application, the 4-speed shift gear device 19 can be automatically disengaged from the 4-speed output gear during the shift of the transmission 1 from 4-speed to 3-speed. Specifically, after the external clutch 11 is switched from the disengaged state to the engaged state, the external clutch 11 drives the internal input shaft 14 to rotate, the internal input shaft 14 further drives the output shaft 15 to rotate, and since the rotation speeds of the 4-speed shift tooth device 19 and the 4-speed output gear are no longer the same at this time, a relative motion is generated between the 4-speed shift tooth 20 and the shift tooth fixing groove 21, and since the smooth protrusion 212 exists in the shift tooth fixing groove 21, the shift tooth 20 can be pushed open by the smooth protrusion 212, so that the 4-speed shift tooth 20 and the shift tooth fixing groove 21 are automatically separated, that is, the 4-speed shift tooth device 19 and the 4-speed output gear can be automatically separated. It is this design that enables non-delay and non-intermittent shifting by first engaging the outer clutch 11 and then disengaging the inner clutch 12 during shifting from 4 to 3.

The upshifting and downshifting processes have been described above by way of example only, and the shifting processes between the other gears are similar to the above examples. In the embodiment of the application, the gear-up process between any two gears and the gear-down process between any two gears can realize non-time-delay and non-intermittent gear shifting.

To sum up, in the technical scheme provided by the embodiment of the application, in the process of shifting gears of the gearbox, by means of the smooth protruding part between the shifting gear device and the movable gear, the shifting gear device of the original gear and the movable gear of the original gear can be automatically separated, and the design is just the way, so that in the process of switching from the original gear to the target gear, the clutch of the original gear can be separated by combining the clutch of the target gear firstly, the non-intermittent speed change is realized, and no time delay is caused during gear shifting.

In an exemplary embodiment, as shown in fig. 8, the gearbox 1 further comprises a power assembly 16. The power assembly 16 is connected to the inner input shaft 14 and the outer input shaft 13 through a first connecting assembly 22 and a second connecting assembly 23, respectively. The power assembly 16 is capable of applying power to the inner input shaft 14 through a first coupling assembly 22 and the power assembly 16 is also capable of applying power to the outer input shaft 13 through a second coupling assembly 23.

During the process of switching from the first operating state to the second operating state, the power assembly 16 drives the outer input shaft 13 to rotate through the second connecting assembly 23, so that the rotation speed of the gear shifting tooth device 19 of the second gear is the same as the rotation speed of the movable gear 18 of the second gear; after the same rotational speed, the shifting tooth arrangement 19 of the second gear meshes with the loose gear 18 of the second gear.

During the switching from the second operating state to the first operating state, the power assembly 16 rotates the inner input shaft 14 via the first connecting assembly 22, so that the rotational speed of the shift tooth device 19 in the first gear is the same as the rotational speed of the loose gear 18 in the first gear; after the same rotational speed, the shifting tooth arrangement 19 of the first gear meshes with the loose gear 18 of the first gear.

Taking an upshift process from 1 st gear to 2 nd gear as an example, it is assumed that the gear ratio of the input gear of 1 st gear to the output gear of 1 st gear is 1:3, and the gear ratio of the input gear of 2 nd gear to the output gear of 2 nd gear is 1: 2. Assuming that the rotation speed of the inner input shaft 14 is 3000r/min in the 1-gear operating state, the rotation speed of the output shaft 15 is 1000 r/min. In the operating state of 1 gear, the speed of the 2 gear shifting device 19 is the same as the speed of the output shaft 15, both being 1000r/min, but since the output gear of 2 gear is a loose gear, the speed may not be the same as the speed of the output shaft 15. In order to prevent gear hitting between the gear shifting gear device 19 for controlling the 2-gear and the output gear of the 2-gear when the gear shifting gear device 19 is engaged with the output gear of the 2-gear, the power assembly 16 can be controlled to drive the external input shaft 13 to rotate through the second connecting assembly 23, for example, the rotation speed of the external input shaft 13 is controlled to be 2000r/min, the gear tooth ratio of the input gear of the 2-gear to the output gear of the 2-gear is controlled to be 1:2, and therefore, when the rotation speed of the external input shaft 13 is controlled to be 2000r/min, the rotation speed of the output gear of the 2-gear is controlled to be 1000 r/min. In this way, when the rotational speed of the shift gear device 19 in the 2 th gear is the same as the rotational speed of the output gear in the 2 nd gear (both are 1000r/min), the shift gear device 19 in the 2 nd gear is controlled to be engaged with the output gear in the 2 nd gear, and therefore, gear rattling does not occur.

Taking a downshift process from 9 th gear to 4 th gear as an example, it is assumed that the gear ratio of the input gear of 9 th gear to the output gear of 9 th gear is 3:1, and the gear ratio of the input gear of 4 th gear to the output gear of 4 th gear is 1: 1. Assuming that the rotation speed of the inner input shaft 14 is 3000r/min in the 9-speed operation state, the rotation speed of the output shaft 15 is 9000 r/min. In the 9-gear operating state, the rotational speed of the 4-gear shift gear device 19 is equal to the rotational speed of the output shaft 15, and is 9000r/min, but since the output gear of the 4-gear shift gear is a loose gear, the rotational speed may not be equal to the rotational speed of the output shaft 15. In order to prevent gear rattling between the 4-speed gear shifting gear device 19 and the 4-speed output gear when the gear shifting gear device 19 is controlled to be engaged with the 4-speed output gear, the power assembly 16 can be controlled to drive the external input shaft 13 to rotate through the second connecting assembly 23, for example, the rotating speed of the external input shaft 13 is controlled to be 9000r/min, the gear tooth ratio of the 4-speed input gear to the 4-speed output gear is controlled to be 1:1, and therefore, when the rotating speed of the external input shaft 13 is 9000r/min, the rotating speed of the 4-speed output gear is 9000 r/min. In this way, when the rotational speed of the 4-speed shift gear device 19 is the same as the rotational speed of the 4-speed output gear (9000 r/min), the engagement between the 4-speed shift gear device 19 and the 4-speed output gear is controlled again, and therefore, gear rattling does not occur.

The upshifting and downshifting processes have been described above by way of example only, and the shifting processes between the other gears are similar to the above examples. In this application embodiment, the condition of beating the tooth can not appear in the process of upshift between arbitrary two fender position to and the process of downshift between arbitrary two fender positions. In addition, in the above examples, the numerical values of the gear ratio and the rotational speed are exemplified and explained, for the sake of clarity of explaining the principle of the technical solution of the present application, in practical applications, the gear ratio and the rotational speed may be set as appropriate according to actual requirements, and the embodiments of the present application are not limited thereto.

Optionally, the power assembly 16 includes a first motor and a second motor. The first motor is connected with the inner input shaft 14 through a first connecting assembly 22, the first connecting assembly 22 comprises a first driving gear arranged at the power output end of the first motor and a first driven gear arranged on the inner input shaft 14 and meshed with the first driving gear; the second motor is connected with the outer input shaft 13 through a second connecting assembly 23, and the second connecting assembly 23 comprises a second driving gear arranged at the power output end of the second motor and a second driven gear arranged on the outer input shaft 13 and meshed with the second driving gear. In the above way, the power of the power assembly 16 is transmitted to the input shaft, and the input shaft is driven to rotate.

To sum up, among the technical scheme that this application embodiment provided, still through design power component in the gearbox, at the in-process of shifting gears, drive the input shaft through this power component and rotate for after the rotational speed of the tooth device of shifting gears of target position is the same with loose gear, both meshing of controlling again, thereby avoid appearing the condition of beating the tooth, promote the performance and the life of shifting gears of gearbox.

An exemplary embodiment of the present application also provides an automobile including a transmission as described in the above embodiments. By car is meant a powered, non-rail-mounted vehicle having 4 or more wheels, primarily for carrying people and/or cargo, towing a vehicle carrying people and/or cargo, or other special purpose. In the embodiment of the present application, the kind of the automobile is not particularly limited.

The automobile that is equipped with the gearbox that this application embodiment provided can realize not having intermittent type variable speed, does not have time delay when shifting gears, does not have because of the pause of time delay production is frustrated and is felt, and the driving experience is better.

The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.

The above description is only exemplary of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A gear shift mechanism for a transmission, said gear shift mechanism comprising: the movable gear and the gear shifting tooth device are coaxially arranged, wherein the movable gear can rotate around a shaft on which the movable gear is arranged, and the gear shifting tooth device can move along the direction of the shaft;

a gear shifting tooth and a gear shifting tooth fixing groove which are meshed with each other are formed between the movable gear and the gear shifting tooth device;

the gear shifting tooth fixing grooves are annular, at least two fixing teeth matched with the gear shifting teeth exist in the gear shifting tooth fixing grooves, a smooth protruding portion is formed between every two adjacent fixing teeth, the smooth protruding portion is located in the middle of every two adjacent fixing teeth, and the height of the smooth protruding portion is the same as the depth of grooves of the gear shifting tooth fixing grooves.

2. The shift mechanism of claim 1,

the gear shifting gear device comprises a gear shifting gear base arranged on a shaft and gear shifting gears connected with the gear shifting gear base through splines; a gear shifting tooth fixing groove corresponding to the gear shifting tooth is formed on the side edge of the movable gear;

or,

the shifting gear device comprises a shifting gear base arranged on the shaft and a shifting gear fixing groove connected with the shifting gear base through a spline; and gear shifting teeth corresponding to the gear shifting tooth fixing grooves are formed on the side edges of the movable gears.

3. The shift mechanism of claim 2,

a first limiting groove is formed on the gear shifting tooth base, and a second limiting groove corresponding to the first limiting groove is formed on the gear shifting tooth or the gear shifting tooth fixing groove;

an elastic part and a steel ball positioned at the top of the elastic part are arranged in the first limiting groove;

under the condition that the movable gear and the gear shifting device are in a separated state, one part of the steel ball is positioned in the first limiting groove, and the other part of the steel ball is positioned in the second limiting groove.

4. The shift mechanism of claim 3, wherein the first retainer groove is provided in a plurality and the plurality of first retainer grooves are evenly distributed around the shaft on the shift tooth base.

5. The shift mechanism of claim 1, further comprising an electromagnetic fork, the electromagnetic fork comprising: the device comprises a shell, a first fixed block, a second fixed block, a movable block and a shifting fork piece, wherein the first fixed block, the second fixed block and the movable block are arranged in the shell;

the positions of the first fixed block and the second fixed block are fixed;

the movable block is positioned between the first fixed block and the second fixed block, and the movable block is electromagnetically coupled with the first fixed block and the second fixed block respectively;

one end of the shifting fork piece is connected with the movable block, and the other end of the shifting fork piece is connected with the gear shifting tooth device.

6. The gear shift mechanism according to claim 5, wherein a first elastic member is disposed between the movable block and the first fixed block; a second elastic part is arranged between the movable block and the second fixed block;

a limit baffle is arranged between the movable block and the side edge of the shell; a protruding part is formed on one surface of the movable block opposite to the limiting baffle, and a groove part matched with the protruding part is formed on the limiting baffle;

an elastic part is arranged between the limiting baffle and the shell.

7. A transmission, characterized in that it comprises: the clutch comprises an outer clutch, an inner clutch, an outer input shaft, an inner input shaft and an output shaft;

the outer input shaft and the inner input shaft are coaxially arranged; the outer clutch is connected with the inner input shaft, and the inner clutch is connected with the outer input shaft;

the outer input shaft and the inner input shaft are provided with input gears of various gears, and the output shaft is provided with output gears of various gears meshed with the input shaft gears; the input gear comprises a fixed gear and a movable gear, the output gear also comprises the fixed gear and the movable gear, the movable gear is correspondingly provided with a gear shifting gear device, the movable gear and the gear shifting gear device are coaxially arranged, the movable gear can rotate around a shaft on which the movable gear is arranged, and the gear shifting gear device can move along the direction of the shaft;

a shifting tooth and a shifting tooth fixing groove which are meshed with each other are formed between the movable gear and the shifting tooth device, the shifting tooth fixing groove is annular, at least two fixing teeth matched with the shifting tooth exist in the shifting tooth fixing groove, a smooth protruding portion is formed between every two adjacent fixing teeth, the smooth protruding portion is located in the middle of every two adjacent fixing teeth, and the height of the smooth protruding portion is the same as the depth of a groove of the shifting tooth fixing groove; during the process of switching the gearbox from an original gear to a target gear, because the rotating speeds of the movable gear and the shifting gear device of the original gear are not the same any more, relative motion is generated between the movable gear and the shifting gear device, and the shifting gear is jacked open by the smooth bulge part in the shifting gear fixing groove, so that the movable gear and the shifting gear device are automatically separated;

in a first working state, the outer clutch drives the inner input shaft to rotate, the inner input shaft drives an input gear of a first gear on the inner input shaft to rotate, the input gear of the first gear drives an output gear of the first gear on the output shaft to rotate, and the output gear of the first gear drives the output shaft to rotate;

in a second working state, the inner clutch drives the outer input shaft to rotate, the outer input shaft drives an input gear of a second gear on the outer input shaft to rotate, the input gear of the second gear drives an output gear of the second gear on the output shaft to rotate, and the output gear of the second gear drives the output shaft to rotate;

during the process of switching from the first working state to the second working state, after the rotating speed of the gear shifting tooth device of the second gear is the same as that of the movable gear of the second gear, the gear shifting tooth device of the second gear is meshed with the movable gear of the second gear, the inner clutch is combined, and after the inner clutch is combined, the outer clutch is separated;

in the process of switching from the second working state to the first working state, after the rotating speed of the gear shifting gear device of the first gear is the same as that of the movable gear of the first gear, the gear shifting gear device of the first gear is meshed with the movable gear of the first gear, the outer clutch is combined, and after the outer clutch is combined, the inner clutch is separated.

8. The transmission of claim 7, wherein the shift gear device includes a shift gear base provided on the inner input shaft, the outer input shaft, or the output shaft, and shift teeth splined to the shift gear base;

and a gear shifting tooth fixing groove corresponding to the gear shifting tooth is formed on the side edge of the movable gear corresponding to the gear shifting tooth device.

9. The transmission according to claim 8, wherein a first limit groove is formed on the gear shifting tooth base, and a second limit groove corresponding to the first limit groove is formed on the gear shifting tooth;

an elastic part and a steel ball positioned at the top of the elastic part are arranged in the first limiting groove;

under the condition that the movable gear and the gear shifting device are in a separated state, one part of the steel ball is positioned in the first limiting groove, and the other part of the steel ball is positioned in the second limiting groove.

10. The transmission of claim 7, further comprising: the electromagnetic shifting fork corresponds to the gear shifting tooth device; the electromagnetic shift fork includes: the device comprises a shell, a first fixed block, a second fixed block, a movable block and a shifting fork piece, wherein the first fixed block, the second fixed block and the movable block are arranged in the shell;

the positions of the first fixed block and the second fixed block are fixed;

the movable block is positioned between the first fixed block and the second fixed block, and the movable block is electromagnetically coupled with the first fixed block and the second fixed block respectively;

one end of the shifting fork piece is connected with the movable block, and the other end of the shifting fork piece is connected with the gear shifting tooth device.

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