Speed change device, speed change equipment and vehicle

Abstract

The utility model discloses a speed change device, speed change equipment and a vehicle, the speed change device comprises a power input shaft, a power output shaft and a transmission mechanism, the power input shaft is used for being connected with a driving mechanism, and the power output shaft and the power input shaft are arranged at an interval; the transmission mechanism comprises a driving wheel arranged on the power input shaft in a sleeving mode, a driven wheel arranged on the power output shaft in a sleeving mode and a transmission belt in transmission connection with the driving wheel and the driven wheel, the driving wheel comprises a driving fixed disc and a driving movable disc, and the driving fixed disc comprises a first transmission face. The driving moving disc slides in the axial direction of the power input shaft and comprises a second transmission face, the transmission belt is clamped by the first transmission face and the second transmission face, and the first transmission face and the second transmission face are both inclined faces. The driving movable disc gets close to or away from the driving fixed disc along the power input shaft, the working diameter of the transmission belt at the driving wheel is changed, the transmission ratio is dynamically adjusted, the output requirement of the power output shaft is met, and a power source connected with the power input shaft can efficiently operate.

Description

TECHNICAL FIELD

[0001] The utility model relates to transmission technology field especially is a kind of transmission device, transmission equipment and vehicle. BACKGROUND

[0002] The transmission ratio of the transmission system of existing motor is fixed, and a mechanical differential is usually used to distribute torque of the motor, but the mechanical differential can only distribute torque as required, and cannot distribute torque in advance according to actual conditions, so that the motor is low in efficiency under high-speed working conditions. SUMMARY

[0003] The technical problem solved by the present application is to provide a transmission device, a transmission equipment and a vehicle, which can solve the problem of low efficiency of the motor under high-speed working conditions.

[0004] To solve the above technical problem, one technical solution adopted by the present application is to provide a transmission device, which comprises a power input shaft, a power output shaft and a transmission mechanism, the power input shaft is used to be connected with a driving mechanism to rotate under the driving of the driving mechanism, the power output shaft is arranged apart from the power input shaft, the transmission mechanism comprises a driving wheel arranged on the power input shaft, a driven wheel arranged on the power output shaft and a transmission belt connecting the driving wheel and the driven wheel, the driving wheel comprises a driving fixed disc arranged along the extension direction of the power input shaft and a driving movable disc, the driving fixed disc is fixedly connected with the power input shaft and comprises a first transmission surface facing the driving movable disc, the driving movable disc is configured to slide along the axial direction of the power input shaft with the change of the rotating speed of the power input shaft, and the driving movable disc comprises a second transmission surface facing the driving fixed disc, the transmission belt is clamped by the first transmission surface and the second transmission surface, and the first transmission surface and the second transmission surface are both inclined surfaces, so that the distance between the first transmission surface and the second transmission surface decreases in the direction close to the power input shaft.

[0005] To solve the above technical problem, the present application also provides another technical solution, which is a transmission equipment comprising a driving mechanism and a transmission device as described above connected with the driving mechanism.

[0006] To solve the above technical problem, the present application also provides another technical solution, which is a vehicle comprising the transmission equipment as described above.

[0007] Beneficial effects: the active moving disc in the application can slide along the axial direction of the power input shaft to approach or move away from the active fixed disc with the change of the rotating speed of the power input shaft, so as to change the working diameter of the transmission belt at the driving wheel, thereby realizing the dynamic adjustment of the transmission ratio, and flexibly adapting to different power output requirements at the power output shaft, so that the speed change device can better match the load change while maintaining high efficiency, thereby enabling the power source connected to the power input shaft to operate in the high efficiency interval. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0009] Figure 1 The structural schematic diagram of the speed change device provided by an embodiment of the present application is shown in the figure.

[0010] Figure 2 The exploded structural schematic diagram of the speed change device provided by an embodiment of the present application is shown in the figure.

[0011] Figure 3 The structural schematic diagram of the speed change device provided by an embodiment of the present application is shown in the figure. Figure 1 The sectional view along the section line A-A in the figure.

[0012] Figure 4 The structural schematic diagram of the protective cover provided by an embodiment of the present application is shown in the figure.

[0013] Figure 5 The exploded structural schematic diagram of the protective cover, the driving wheel, the driven wheel and the transmission belt provided by an embodiment of the present application is shown in the figure.

[0014] Figure 6 The structural block diagram of the vehicle provided by an embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0016] The terms "first", "second", "third", "etc." are used only for descriptive purposes and do not connote or imply relative importance or a quantity of the indicated technical features. Thus, features defined with "first", "second" or "third" can include at least one of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically defined. All directional references, such as up, down, left, right, front, back, etc., used in the description of the present application are only used for convenience of explanation and are not intended to limit the scope of the present application. In addition, the terms "comprise", "have" and "include" and any variations thereof are intended to cover non-exclusive inclusion. For example, processes, methods, systems, products or devices that include a list of steps or units are not limited to the listed steps or units, but can optionally include additional steps or units not listed or can optionally include other steps or units inherent to such processes, methods, products or devices.

[0017] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase that in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that the embodiments described herein are merely examples from a multitude of embodiments that are in substantial compliance with the principles of the application.

[0018] Please refer to Figure 1 The present application provides a variable speed device 100, which comprises a power input shaft 10, a power output shaft 20 and a transmission mechanism 30. The power input shaft 10 is connected with a driving mechanism 40 to rotate under the driving of the driving mechanism 40, thereby providing power for the whole variable speed device 100. The power output shaft 20 is arranged apart from the power input shaft 10, and the transmission mechanism 30 is connected between the power input shaft 10 and the power output shaft 20. The transmission mechanism 30 is used to transmit the adjusted rotating speed to the power output shaft 20, thereby indirectly transmitting the adjusted rotating speed to a load device, so as to realize the variable speed function of the load device.

[0019] The transmission mechanism 30 comprises a driving wheel 31 sleeved on the power input shaft 10, a driven wheel 32 sleeved on the power output shaft 20, and a transmission belt 33 connecting the driving wheel 31 and the driven wheel 32. The driving wheel 31 is used to efficiently and stably transmit the power input by the power input shaft 10. The transmission belt 33 is a key component connecting the driving wheel 31 and the driven wheel 32, and is responsible for transmitting the power on the driving wheel 31 to the driven wheel 32. The driven wheel 32 is sleeved on the power output shaft 20 and rotates under the drive of the transmission belt 33, so that the power output shaft 20 transmits the power received from the driven wheel 32 to the subsequent load device.

[0020] Specifically, please refer to Figure 1 , Figure 2 and Figure 3 , the driving wheel 31 comprises a driving fixed disc 311 arranged along the extension direction of the power input shaft 10 and a driving movable disc 312. The driving fixed disc 311 is fixedly connected with the power input shaft 10 and comprises a first transmission surface 3111 facing the driving movable disc 312, so that the driving fixed disc 311 can rotate with the power input shaft 10, reducing the risk of sliding or deviation of the driving fixed disc 311 relative to the power input shaft 10 due to external load.

[0021] The driving movable disc 312 is configured to slide along the axial direction of the power input shaft 10 as the rotational speed of the power input shaft 10 changes, and comprises a second transmission surface 3121 facing the driving fixed disc 311. The transmission belt 33 is clamped by the first transmission surface 3111 and the second transmission surface 3121, and both the first transmission surface 3111 and the second transmission surface 3121 are inclined surfaces, so that the distance between the first transmission surface 3111 and the second transmission surface 3121 decreases in the direction close to the power input shaft 10.

[0022] The inclination of the first transmission surface 3111 and the second transmission surface 3121 allows the driving wheel 31 to adapt to the power transmission requirements under different rotational speeds and load conditions. When the rotational speed of the power input shaft 10 changes, the driving movable disc 312 slides along the axial direction according to a predetermined logic or an external control signal, adjusts the relative position with the driving fixed disc 311 to change the working diameter of the transmission belt 33 at the driving wheel 31, automatically optimizes the transmission ratio of the transmission device 100 in the process of transmitting power from the driving wheel 31 to the driven wheel 32, realizes the function of speed change and improves the transmission efficiency of the transmission device 100.

[0023] In the above-mentioned variable speed device 100, the driving movable disc 312 can slide along the axial direction of the power input shaft 10 to approach or move away from the driving fixed disc 311 with the change of the rotating speed of the power input shaft 10, so as to change the working diameter of the transmission belt 33 at the driving pulley 31, thereby realizing the dynamic adjustment of the transmission ratio, and flexibly adapting to the different power output requirements at the power output shaft 20, so that the variable speed device 100 can better match the load change while maintaining high efficiency, thereby enabling the power source (i.e. the driving mechanism 40) connected to the power input shaft 10 to operate in the high efficiency interval.

[0024] In an embodiment, during operation, the variable speed device 100 can change the driving pulley 31 through program control of the driving mechanism 40 (e.g. motor) to realize stepless speed change, adjust the torque distribution, and thereby make the driving mechanism 40 (e.g. motor) operate in the high efficiency interval through the variable rotating speed ratio, thereby improving the efficiency and endurance of the vehicle 300. The following embodiment is taken as an example, in which the driving mechanism 40 is a motor:

[0025] When the motor is at 16000 rpm / 20 Nm (i.e. the rotating speed and torque input by the power input shaft 10), through the change of the transmission ratio of the variable speed device 100, the rotating speed after the speed change is controlled at 8000 rpm while the torque is increased to 40 Nm (i.e. the rotating speed and torque output by the power output shaft 20) under the condition that the vehicle speed of the vehicle 300 is unchanged, thereby realizing the operation of the motor in the high efficiency interval through speed reduction and torque increase.

[0026] Please continue to refer to Figure 1 , Figure 2 and Figure 3 In an embodiment, the power input shaft 10 includes a first end 11 and a second end 12 arranged oppositely, the first end 11 is used to be connected with the driving mechanism 40, and the driving fixed disc 311 and the driving movable disc 312 are arranged in sequence along the direction from the first end 11 to the second end 12. The driving fixed disc 311 does not change its position on the power input shaft 10 with the movement of other components, and the driving fixed disc 311 serves as a static fulcrum to clamp the transmission belt 33 together with the driving movable disc 312, so as to change the position of the transmission belt 33 on the first transmission surface 3111 and the second transmission surface 3121, thereby further changing the working diameter of the transmission belt 33 at the driving pulley 31, to realize the dynamic adjustment of the transmission ratio of the variable speed device 100, so as to flexibly adapt to the different power output requirements at the power output shaft 20.

[0027] Please continue to refer to Figure 1 , Figure 2 and Figure 3In an embodiment, when the power input shaft 10 rotates at an increased speed under the drive of the driving mechanism 40, the driving movable disc 312 moves towards the driving fixed disc 311. It can be understood that, with the movement of the driving movable disc 312, the position of the transmission belt 33 between the first transmission surface 3111 and the second transmission surface 3121 changes, i.e., the working diameter of the transmission belt 33 at the driving pulley 31 changes.

[0028] Specifically, when the power input shaft 10 rotates at an increased speed (at this time, the load on the power output shaft 20 decreases), the speed of the driving pulley 31 increases, so that the driving movable disc 312 approaches the driving fixed disc 311, at this time, the working diameter of the transmission belt 33 at the driving pulley 31 becomes larger, and since the working diameter of the transmission belt 33 at the driven pulley 32 does not change, the speed-increasing and torque-decreasing purpose of the transmission device 100 can be achieved.

[0029] Conversely, when the power input shaft 10 rotates at a decreased speed (at this time, the load on the power output shaft 20 increases), the speed of the driving pulley 31 decreases, so that the driving movable disc 312 moves away from the driving fixed disc 311, at this time, the working diameter of the transmission belt 33 at the driving pulley 31 becomes smaller, and since the working diameter of the transmission belt 33 at the driven pulley 32 does not change, the speed-decreasing and torque-increasing purpose of the transmission device 100 can be achieved.

[0030] Please refer to Figure 1 and Figure 2 In an embodiment, the driven pulley 32 comprises two driven fixed discs 321, which are arranged in a spaced manner along the extension direction of the power output shaft 20, and each driven fixed disc 321 comprises a third transmission surface 3211 facing the other driven fixed disc 321, and the transmission belt 33 is clamped by the two third transmission surfaces 3211. The driven fixed disc 321 is fixedly connected with the power output shaft 20 to ensure that the driven pulley 32 can rotate synchronously with the power output shaft 20, and during the operation of the transmission device 100, the transmission belt 33 transmits power from the driving pulley 31 to the driven pulley 32 through the contact with the third transmission surface 3211 of the driven fixed disc 321, thereby driving the power output shaft 20 to rotate.

[0031] The driven pulley 32 and the driving pulley 31 jointly constitute the core transmission part of the transmission device 100, by adjusting the position of the driving movable disc 312 on the driving pulley 31, the working diameter of the transmission belt 33 on the driving pulley 31 (i.e., the contact radius of the transmission belt 33 with the driving pulley 31) is changed, thereby realizing the transmission function. The driven pulley 32 needs to ensure that the transmission belt 33 can be stably clamped between the two third transmission surfaces 3211 during the transmission process, thereby reducing the risk of slippage or falling of the transmission belt 33 at the driven pulley 32.

[0032] Please refer to Figure 1 and Figure 2In an embodiment, the driven wheel 32 needs to be coordinated with other components of the power output shaft 20 to ensure the smoothness and reliability of the entire transmission device 100. For example, a support bearing can be provided on the power output shaft 20 to reduce the vibration and deflection of the driven wheel 32 when rotating at high speed.

[0033] Please continue to refer to Figure 1 and Figure 2 In an embodiment, one of the two third transmission surfaces 3211 is an inclined surface, and the other is a flat surface, or both of the two third transmission surfaces 3211 are inclined surfaces, or both of the two third transmission surfaces 3211 are flat surfaces, all of which can achieve clamping the transmission belt 33 between the two third transmission surfaces 3211, reducing the risk of the transmission belt 33 slipping or falling off the driven wheel 32.

[0034] Please refer to Figure 4 and Figure 5 In an embodiment, the transmission device 100 further comprises a protective cover 50, which covers the outside of the driving wheel 31, the driven wheel 32 and the transmission belt 33. The protective cover 50 can reduce the risk of affecting the normal operation of the transmission device 100 due to the entry of dust, dirt and other pollutants into the inside of the transmission device 100.

[0035] Please continue to refer to Figure 4 and Figure 5 In an embodiment, the protective cover 50 is provided with a through hole 51, which is configured to allow the end of the power output shaft 20 to protrude out to connect with an external load device.

[0036] Please refer to Figure 1 The application also provides a transmission device 200, which comprises a driving mechanism 40 and a transmission device 100 connected with the driving mechanism 40. The driving mechanism 40 is the power source of the transmission device 200, responsible for providing the initial power input, and the transmission device 100 is used to adjust the rotation speed and torque output by the driving mechanism 40 and transmit them to the load device.

[0037] Please continue to refer to Figure 1 In an embodiment, the number of transmission devices 100 is two, and the two transmission devices 100 are arranged on both sides of the driving mechanism 40 and are in transmission connection with the driving mechanism 40. Among them, the power input shafts 10 of the two transmission devices 100 are coaxially arranged, that is, the above-mentioned two transmission devices 100 share the same axis, which simplifies the mechanical structure and reduces the space occupation, at the same time, the power can maintain consistent rotation direction and speed when input to the two transmission devices 100, realizing the double stepless speed change function of the transmission device 200, and improving the efficiency and torque of power transmission.

[0038] In an embodiment, the driving mechanism 40 adopts a coaxial double-motor driving structure for driving the power input shaft 10 in the two variable speed devices 100 to rotate.

[0039] Please refer to Figure 1 and Figure 6 , the application also provides a vehicle 300 comprising the above-mentioned variable speed device 200.

[0040] The variable speed process of the variable speed device 200 includes: the driving mechanism 40 starts, and the power is transmitted to the power input shaft 10 of the variable speed device 100 through the output shaft, the variable speed device 100 adjusts the transmission ratio (i.e. adjusts the working diameter of the transmission belt 33 at the driving wheel 31) according to the load demand, changes the rotating speed and torque of the power output shaft 20. The adjusted power is transmitted to the load device through the power output shaft 20 to drive it to run.

[0041] Among them, the variable speed device 200 can replace the existing differential, and the traditional electric drive needs a differential to realize the different rotating speeds of the left and right wheels of the vehicle 300, and the variable speed device 200 of the application is provided with two variable speed devices 100, i.e. double stepless speed change, which reduces the risk of insufficient torque of single stepless speed change. At the same time, the structure of double stepless speed change is simple, which can reduce the noise, vibration and unevenness of the vehicle 300, i.e. reduce the NVH of the vehicle, so as to improve the comfort and quality of the vehicle 300.

[0042] At the same time, the variable speed device 200 with double stepless speed change can realize low speed or zero speed through program control of one variable speed device 100 and high speed of the other variable speed device 100 in the variable speed device 200 during the turning process of the vehicle 300, so that the vehicle 300 can realize smaller turning radius, and improve the efficiency and safety during the turning process of the vehicle 300.

[0043] The variable speed device 200 can distribute torque in advance according to road conditions, adjust the transmission ratio to achieve better driving feeling, and also improve the driving efficiency of the driving mechanism 40, so that the high efficiency space of the driving mechanism 40 is larger, thereby improving the efficiency and endurance of the vehicle 300.

[0044] The above is only an embodiment of the application, and does not limit the patent scope of the application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the application.

Claims

1. A speed-changing device, characterized in that, The speed change device includes: A power input shaft is used to connect to a drive mechanism to rotate under the drive of the drive mechanism; The power output shaft is spaced apart from the power input shaft; A transmission mechanism includes a drive wheel sleeved on the power input shaft, a driven wheel sleeved on the power output shaft, and a transmission belt connecting the drive wheel and the driven wheel. The drive wheel includes a drive fixed disc and a drive moving disc arranged along the extension direction of the power input shaft. The drive fixed disc is fixedly connected to the power input shaft and includes a first transmission surface facing the drive moving disc. The drive moving disc is configured to slide along the axial direction of the power input shaft as the rotational speed of the power input shaft changes, and the drive moving disc includes a second transmission surface facing the drive fixed disc. The transmission belt is held between the first transmission surface and the second transmission surface, and both the first transmission surface and the second transmission surface are inclined surfaces to reduce the distance between the first transmission surface and the second transmission surface in the direction close to the power input shaft.

2. The speed change device according to claim 1, characterized in that, The power input shaft includes a first end and a second end that are arranged opposite to each other. The first end is used to connect to the drive mechanism. Along the direction from the first end to the second end, the active fixed disk and the active moving disk are arranged in sequence.

3. The speed change device according to claim 1, characterized in that, The driven wheel includes two driven fixed discs, which are spaced apart along the extension direction of the power output shaft. Each driven fixed disc includes a third transmission surface facing the other driven fixed disc, and the transmission belt is held by the two third transmission surfaces.

4. The speed change device according to claim 3, characterized in that, One of the two third transmission surfaces is an inclined plane and the other is a plane, or both of the third transmission surfaces are inclined planes, or both of the third transmission surfaces are planes.

5. The speed change device according to claim 1, characterized in that, When the rotational speed of the power input shaft increases under the drive of the drive mechanism, the active moving disk moves toward the active fixed disk.

6. The speed change device according to claim 1, characterized in that, The speed change device also includes: A protective cover is installed on the outside of the driving wheel, the driven wheel, and the transmission belt.

7. The speed change device according to claim 6, characterized in that, The protective cover has a through hole configured to allow the end of the power output shaft to extend out for connection to an external load device.

8. A speed-changing device, characterized in that, include: The drive mechanism and the speed change device as described in any one of claims 1-7 connected to the drive mechanism.

9. The speed-changing device according to claim 8, characterized in that, The number of the transmission devices is two, and the two transmission devices are arranged on both sides of the drive mechanism and are both connected to the drive mechanism in a transmission manner. The power input shafts of the two transmission devices are arranged coaxially.

10. A vehicle, characterized in that, The speed change device includes any one of claims 8-9 above.

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