阅读说明：本技术 换挡装置 (Gear shifting device ) 是由 F·特林 于 2019-01-15 设计创作，主要内容包括：本发明涉及一种用于对变速器(3)的齿轮(2)进行换挡的变速装置(1)。该变速器包括第一换挡轴(4)和第一换挡元件(5),该第一换挡元件(5)与第一换挡轴(4)相关联并被布置成沿第一换挡轴(4)的轴向移动以致动第一组齿轮。它还包括第二换挡轴(6)和第二换挡元件(7),该第二换挡元件(7)与第二换挡轴(6)相关联并被布置成沿第二换挡轴(6)的轴向移动以致动第二组齿轮。所述第一和第二换挡轴中的一个为空心的,所述第一和第二换挡轴中的另一个部分被同轴布置在所述空心轴内。(The invention relates to a transmission device (1) for shifting a gear wheel (2) of a transmission (3). The transmission comprises a first shift shaft (4) and a first shift element (5), the first shift element (5) being associated with the first shift shaft (4) and arranged to be moved in an axial direction of the first shift shaft (4) to actuate a first set of gears. It further comprises a second shift shaft (6) and a second shift element (7), the second shift element (7) being associated with the second shift shaft (6) and arranged to be moved in an axial direction of the second shift shaft (6) to actuate the second set of gears. One of the first and second shift shafts is hollow and the other of the first and second shift shafts is disposed coaxially within the hollow shaft.)

1. A transmission arrangement (1) for shifting gears (2) of a transmission (3) comprising a first shift axle (4), a first shift element (5), a second shift axle (6) and a second shift element (7), wherein the first shift element (5) is associated with the first shift axle (4) and arranged to be moved in an axial direction of the first shift axle (4) to actuate a first set of gears, the second shift element (7) is associated with the second shift axle (6) and arranged to be moved in an axial direction of the second shift axle (6) to actuate a second set of gears,

it is characterized in that the preparation method is characterized in that,

one of the first and second shift shafts is hollow and the other of the first and second shift shafts is disposed coaxially within the hollow shaft.

2. Transmission (1) according to claim 1, wherein at least one of said shift shafts is equipped with an external thread (8) and is connected by said thread to its shifting element having an internal thread (9) corresponding to said thread of said shaft, so that said element is actuated, in use, with the rotation of said shaft.

3. Transmission (1) according to claim 1, wherein the shift shafts (4, 6) are equipped with an external thread (8) and are connected to the shift elements (5, 7) respectively by means of said external thread, wherein the shift elements (5, 7) have a corresponding internal thread (9) such that the shift elements (5, 7) are actuated upon rotation of the shafts (4, 6) in use.

4. A transmission (1) according to any one of claims 2 and 3, further comprising at least one electric motor (10) for rotating at least one of said shafts.

5. Transmission (1) according to claim 4, wherein the electric motor (10) is connected to the shafts (4, 6) by a drive (11), the drive (11) having two operating positions, in a first of these positions the electric motor (10) being connected to one of the shafts and in a second position to the other of the shafts.

6. Transmission (1) according to claim 5, wherein the drive is a double clutch (11).

7. A transmission (1) according to any one of claims 2 and 3, further comprising one electric motor for each shaft.

8. A transmission (1) according to any of the preceding claims, wherein the shifting element is a shift fork (5, 7).

9. A transmission (3) comprising a transmission arrangement (1) according to any of the preceding claims.

Technical Field

The present invention relates to a transmission device for shifting gears of a transmission comprising a first shift axle, a first shift element associated with the first shift axle and arranged to be moved axially along the first shift axle to actuate a first set of gears, a second shift axle, and a second shift element associated with the second shift axle and arranged to be moved axially along the second shift axle to actuate a second set of gears. The invention also relates to a transmission having such a transmission device.

Background

Today, in the field of manual transmissions, mass market automotive manual transmissions are almost all at least 5 speed.

Electric Vehicles (EVs) have been widely expected to eliminate the need for clutches and multi-speed transmissions because electric motors can drive the vehicle forward and backward from zero speed and can operate over a greater speed range than internal combustion engines. Eliminating the gearbox means a significant reduction in the weight and complexity of the powertrain, while also eliminating a significant source of parasitic losses. Therefore, most first generation consumer electric vehicles are single speed. However, current trends indicate that multi-speed transmissions may be returned to service in many future electric vehicles. This allows for a smaller, less torque motor to be used, running at higher speeds, thereby obtaining more torque on the wheels to achieve low speed traction and higher top travel speeds.

Dual Clutch Transmissions (DCTs), sometimes also referred to as twin-clutch transmissions (twin-clutch) or dual-clutch transmissions (double-clutch transmissions), are one type of automatic transmissions or automatic vehicle transmissions. It uses two independent clutches for the odd and even gear sets. It can basically be referred to as two independent manual transmissions, with their respective clutches contained in one housing and operating as a single unit. While typically operating in a fully automatic mode, many dual clutches also allow the driver to manually shift gears in a semi-automatic mode, although the electro-hydraulic system of the transmission is still used.

From the driver's perspective, some mechanisms are always present whether the transmission is used as an automatic transmission or a manual transmission. The input shaft is connected to the intermediate shaft by meshing gears. The output shaft is also connected to the intermediate shaft through meshing gears. The meshing gear for the latter connection may be connected to the output shaft using a collar, typically a spline, but slidably arranged to move axially along the output shaft between the two gears. Typically, at least two or more sets of a collar and two meshing gear assemblies are arranged on the output shaft. This movement of the collar is actuated by a shift fork, which in its simplest form is actuated directly by the driver operating the gear lever.

For automatic manual transmissions or automatic transmissions with manual transmission gearboxes, the shift forks are actuated by hydraulics or by electric motors. However, most available systems are bulky.

Disclosure of Invention

It is therefore an object of the present invention to provide a transmission arrangement for a transmission which requires less space than conventional solutions. This object is achieved by a transmission according to the appended claims.

According to a first aspect of the present invention, a transmission device for shifting gears of a transmission is provided, wherein the transmission comprises a first shift shaft. It further comprises a first shifting element associated with the first shift shaft and arranged to move axially along the first shift shaft to actuate the first set of gears. Further, a second shift shaft and a second shift element associated with the second shift shaft and arranged to move axially along the second shift shaft to actuate a second set of gears are included. One of the first and second shift shafts is a hollow shaft, and the other of the first and second shift shafts is coaxially disposed within the hollow shaft.

By arranging one shaft inside the other, space can be saved and the transmission can be made smaller. If desired, three or more shafts may be considered, the number of hollow shafts required being one less than the total number of shafts. For example, at least two of the three axes are hollow, at least three of the four axes are hollow, and so on.

According to one aspect of the present disclosure, at least one shift shaft is equipped with an external thread and is connected by a thread to its shift element, which has an internal thread corresponding to the thread of the shaft, so that the shift element is actuated upon rotation of the shaft in use.

No additional space is required for the rotation of the shift shaft when actuating the shift element. Traditionally, the shift shaft drives the shift fork by a translational movement, but this of course requires more space than just a rotation of the shift shaft.

According to another aspect of the present disclosure, the shift shaft is equipped with an external thread and connected to the shift elements, respectively, by the external thread, wherein the shift elements have a corresponding internal thread such that in use the shift elements are actuated as the shaft is rotated.

Also, if all shifting elements of the present transmission are actuated by a rotational movement of the shift shaft, less space is required than if the shifting elements were actuated in a conventional manner.

With the transmission of the present disclosure, when the shift element is actuated by rotation of the shift shaft, according to one aspect of the present disclosure, the transmission includes at least one electric motor for rotating at least one shaft.

The torque required to actuate the shift element by rotating the shift shaft is relatively low, i.e. a smaller electric motor can be used to perform the actuation action. However, the motor should preferably have a fast response.

According to another aspect of the disclosure, the motor is connected to the shafts by a drive having two operating positions, wherein in a first of these positions the motor is connected to one of the shafts and in a second position to the other shaft.

If two shift shafts drive the respective transmission elements by rotation, one drive can be used to connect one electric motor to both shift shafts.

According to one aspect of the disclosure, the type of drive for switching between the shift shafts is a double clutch or a double clutch (sometimes also referred to as twin clutch).

Also, the torque to be handled is low, so the double clutch is preferably of a smaller type, and therefore does not take up much space.

For faster action, according to one aspect of the present disclosure, the transmission includes one motor for each shaft.

Instead of one motor and one drive, such as a dual clutch drive, for each two shift shafts, one motor may be used for each shift shaft.

In most cases, the shifting element is a shifter fork or a shift fork. The function of the shift fork is to engage the slide with each gear in the manual transmission.

Furthermore, a transmission comprising a transmission according to the above disclosure is provided.

Further features of, and advantages with, the present invention will become apparent when studying the appended claims and the following description. Those skilled in the art realize that different features of the present invention can be combined to create embodiments other than the exemplary embodiments described in the following, without departing from the scope of the present invention.

Drawings

The foregoing and additional objects, features and advantages of the invention will be better understood from the following illustrative and non-limiting detailed description of exemplary embodiments of the invention, in which:

FIG. 1 is a cross-sectional view of an exemplary embodiment of a transmission in the case of gears.

FIG. 2 is a cross-sectional view of an exemplary embodiment of a transmission.

FIG. 3 is a cross-sectional view of another exemplary embodiment of a transmission.

Figure 4 is a cross-sectional view of an alternative actuator.

Figure 5 is a cross-sectional view of another actuator.

Detailed Description

The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness. Like reference numerals refer to like elements throughout the description.

Referring to the exemplary embodiment of fig. 1, an exemplary transmission 3 has a transmission 1 for shifting a gear 2. The transmission 3 comprises a first shift shaft 4, a first shift fork 5 associated with the first shift shaft and arranged to move axially along the first shift shaft 4 to actuate a first set of gears. The transmission 3 further comprises a second shift shaft 6, a second shift fork 7 associated with the second shift shaft 6 and arranged to move axially along the second shift shaft 6 to actuate a second set of gears. The first shaft 4 is hollow and the second gear shift shaft 6 is arranged partly coaxially within the hollow shaft 4.

The gear shift shafts 4, 6 are equipped with an external thread 8 and are connected by means of the external thread to the gear shift forks 5, 7, respectively. The shift forks 5, 7 have corresponding internal threads 9 so that the shift forks 5, 7 are actuated in use with rotation of the shafts 4, 6.

In fig. 1, the hollow gear shift shaft 4 has been rotated so that its corresponding shift fork 5 has moved the slide 12 and connected the main shaft 13 to the layer shaft 14 via the lowermost gears 15, 16 in the figure. The figure illustrates only the concepts of the present disclosure and therefore shows only a cross-sectional view of an exemplary transmission.

With continued reference to fig. 2, the electric motor 10 is connected to the shafts 4, 6 by means of a double clutch 11, the double clutch 11 having two operating positions, wherein in a first of these positions the electric motor 10 is connected to one of these shafts and in a second position to the other shaft.

The electric motor 10 rotates an input shaft 17 connected to the double clutch 11. When the uppermost clutch 18 in the figure is connected to the input shaft 17, the hollow shift shaft 4 is activated, whereby the shift fork 5 and the corresponding slide 12 move up or down, depending on the direction of rotation of the input shaft 17 rotated by the motor 10. Likewise, when the lowermost clutch 19 in the figure is connected to the input shaft 17, another shift shaft 6 arranged coaxially within the hollow shift shaft 4 may be activated. Accordingly, the shift fork 7 and the corresponding slider 20 can be moved up or down according to the rotation direction of the input shaft 17 rotated by the motor 10.

Turning now to fig. 3, two motors 10 are shown, each rotating one shaft. The uppermost electric motor 10 in the figure rotates the hollow shift shaft 4, while the lowermost electric motor 10 rotates the shift shaft 6 coaxially arranged within the hollow shift shaft 4. When the shift shaft 4 rotates, the shift fork 5 and the corresponding slider 12 are moved up or down according to the rotational direction of the shift shaft 4. Also, when the shift shaft 6 rotates, the shift fork 7 and the corresponding slider 20 are moved up or down according to the rotational direction of the shift shaft 6.

Returning to the schematic diagram shown in fig. 3 with a single motor 10 and a single drive, the drive type or clutch type in this example is the plate clutch principle. However, more possibilities can be seen in fig. 4 and 5. In fig. 4, the driver is a dog clutch. Fig. 5 shows a planetary gear as drive.

It is to be understood that the invention is not limited to the embodiments described above and illustrated in the drawings; on the contrary, the skilled person will recognise that many variations and modifications may be made within the scope of the appended claims. For example, there may be more than two shift shafts, for example three shift shafts, of which at least two are obviously hollow.

A further combination of fig. 2 and 3 will show this possibility. The shift shaft 6 in fig. 3 can alternatively actuate the shift fork 7 which serves as the input shaft 17 in fig. 2. In other words, two electric motors and one double clutch will be able to drive three shift shafts and correspondingly three shift forks and their corresponding slides.