Gear shifting method based on position correspondence of gear teeth and tooth grooves of gear shifting gear

Abstract

The invention discloses a gear shifting method based on position correspondence of gear teeth and tooth grooves of a gear shifting gear, which comprises the following steps of: arranging a transmission control unit (TCU) and an actuating mechanism applied to gear shifting, and arranging an inner gear ring with an inner tooth groove to replace a synchronizer; a first position sensor for judging the position of an inner tooth groove of the inner gear ring and a second position sensor for judging the position of combined gear teeth of the combined gear are arranged, and the TCU controls the rotating speed of the first motor to enable the combined gear teeth to be axially aligned with the inner tooth groove and enable the rotating speed of the spline gear to be close to or equal to the rotating speed of the combined gear. And the TCU enables the executing mechanism to push the inner gear ring in the neutral gear state to advance to the combined gear. The gear shifting mechanism has the advantages that gear shifting is smooth, pause and abnormal sound are avoided, and power connection is smooth; the inner gear ring replaces a synchronizer, the structure is simple, and durability is achieved; the information acquisition parts are arranged in a centralized mode, and the arrangement positions do not interfere with wheel shafts and splashing lubricating oil in the gearbox.

Description

Technical Field

[0001] The invention relates to a shifting method based on the corresponding positions of gear teeth and tooth grooves of a shifting gear, belonging to the technical field of gearbox shifting. Background Art

[0002] The main body of the traditional gearbox shift mechanism includes a power input shaft, a power output shaft, an external spline gear fixed on the input shaft, a coupling gear adjacent to the external spline and mounted on the input shaft and capable of rotating relative to the input shaft, a driving gear fixed to the coupling gear away from the external spline gear and mounted on the input shaft and capable of rotating relative to the input shaft, a synchronous gear ring mounted outside the external spline gear and meshing with the external spline gear, and a driven gear fixed on the output shaft. The driven gear is often meshed with the driving gear, and the diameter and number of teeth of the external spline gear and the coupling gear are equal. The synchronous gear ring is also called a synchronizer, and has a complex synchronous meshing structure, consisting of a lock ring, a spline hub, a positioning slider, a coupling sleeve, etc. When shifting, the power source is cut off, the shift handle pushes the coupling sleeve to move by operating the shift fork, and the coupling sleeve drives the slider to move. The positioning slider presses on the notch of the lock ring, pushing the lock ring to produce friction with the front cone surface of the gear to be engaged, so that the coupling sleeve increases or decreases speed. When the lock ring is instantaneously synchronized with the gear ring to be engaged, the engagement sleeve passes over the slider and engages with the engagement teeth, thus completing the gear shifting action. The main structure of the synchronous gear ring is that the internal teeth meshing with the external spline teeth with the tooth tops radially inward and the tooth grooves between the internal teeth are capable of sliding toward the coupling gear, so that the synchronous gear ring can be engaged with the external spline gear and the coupling gear at the same time, thus establishing a power transmission relationship between the input shaft and the output shaft through the external spline gear, the synchronous gear ring, the coupling gear, the driving gear and the driven gear.

[0003] The gear shifting mechanism is arranged to realize multi-stage speed change. There are multiple coupling gears on the input shaft, a driving gear corresponding to the number of coupling gears and a driven gear arranged on the output shaft. Generally, a spline gear and a synchronous gear ring are arranged between two adjacent coupling gears, that is, the synchronous gear ring slides to the left to realize one stage of gear shifting, and slides to the right to realize another stage of gear shifting.

[0004] The above-mentioned gearbox shifting mechanism uses a synchronous gear ring to realize the meshing connection between the external spline gear and the combined gear, which has the following defects: 1. The synchronous gear ring has a complex structure, and the power source of the output shaft needs to be cut off when performing the gear shift operation; 2. Even if the power source is cut off, the output shaft still runs with high torque. There is a large speed difference between the synchronous ring gear and the combined gear. There is inevitable conflict and friction between the inner teeth of the synchronous ring gear and the combined gear teeth when they are combined, which can easily cause wear of the inner teeth of the synchronous ring gear and the combined gear teeth, and easily produce abnormal noise. In severe cases, the power output is not smooth, causing the vehicle to run jerk, etc. Summary of the invention

[0005] The technical problem to be solved by the present invention is: how to simplify the synchronizer while making the power output during gear shifting smoother.

[0006] In view of the above problems, the technical solution proposed by the present invention is: A shifting method based on the correspondence between the gear teeth and the tooth groove positions of the shifting gear comprises providing a transmission control unit TCU, an actuator for shifting, providing an inner gear ring with internal tooth grooves to replace a synchronizer, providing a position sensor 1 for judging the position of the inner tooth grooves of the inner gear ring and a position sensor 2 for judging the position of the coupling gear teeth of the coupling gear, wherein the TCU controls the rotation speed of the motor 1 to achieve axial alignment of the coupling gear teeth with the inner tooth grooves and to make the rotation speed of the spline gear close to or equal to the rotation speed of the coupling gear, and the TCU instructs the actuator to push the inner gear ring in a neutral state to shift gears toward the coupling gear.

[0007] The above-mentioned shifting method also includes setting a speed sensor 1 for determining the speed of the input shaft and setting a speed sensor 2 for determining the speed of the output shaft.

[0008] The above-mentioned shifting method comprises the following steps: 1. The TCU confirms that the inner gear ring has been retracted and is in a neutral position where it is only mounted on the outer periphery of the spline gear. If it has not been retracted, the actuator is instructed to push the inner gear ring to retract. Second, the TCU controls the motor 1 to drive the input shaft based on the data transmitted by the speed sensor 1 and the speed sensor 2, so that the speed of the inner gear ring is close to the speed of the combined gear; 3. The TCU controls and confirms that the axial direction of the combined gear teeth is aligned with the internal tooth groove by the data transmitted by the combined position sensor 1 and the position sensor 2; 4. At the moment when it is confirmed that the axial direction of the coupling gear is aligned with the internal tooth groove, the TCU instructs the actuator to push the inner gear ring to shift gears toward the coupling gear.

[0009] In the above shifting method, as described in step 4, at the moment of confirming that the coupling gear is axially aligned with the inner tooth groove, the TCU controls the motor 1 to drive the input shaft so that the rotation speed of the inner gear ring is equal to the rotation speed of the coupling gear, and then the TCU instructs the actuator to push the inner gear ring to shift gears toward the coupling gear.

[0010] To implement the above shifting method, take the following measures: 1. Using the structural features that all spline gears are rigidly connected to the input shaft, all spline gears have the same number of teeth and specifications, and all spline gears are rigidly sleeved with all internal gear rings, an internal tooth groove position code that rotates around the input shaft is set on any component of the input shaft. The set internal tooth groove position code reflects the position information of the internal tooth grooves of all internal gear rings, and the information is entered into the TCU, and the position sensor 1 is enabled to read the internal tooth groove position code; By utilizing the above structural features, an input shaft speed code is set on the component where the internal tooth slot position code is set, and the input shaft speed code is used to reflect the speed information of all the internal gear rings, and the information reflected by the input shaft speed code is input into the TCU, and the speed sensor 1 can read the information of the input shaft speed code; Second, utilizing the structural features that all the shift driven gears are rigidly connected to the output shaft, all the shift driven gears are respectively in constant mesh with the corresponding shift driving gears sleeved on the output shaft, and all the shift driving gears are rigidly connected to their respective coupling gears, selecting any coupling gear to set a coding component, setting a coupling gear tooth position code on the coding component, and the set coupling gear tooth position code reflects the position information of the coupling gear teeth of all the coupling gears, the information is entered into the TCU, and the position sensor 2 is enabled to read the information of the coupling gear tooth position code; The above structural features are used to set the output shaft speed code on the encoding component, and the output shaft speed code reflects the speed information of all the combined gears, enters the information into the TCU, and enables the speed sensor 2 to read the information of the output shaft speed code.

[0011] Furthermore, an input shaft is extended at one end away from the motor to form an input shaft extension section, and an encoding disk 1 engraved with an internal tooth position code and an input shaft speed code is provided at the end of the input shaft extension section; a tubular shaft fixed with the combining gear is provided at the end of the input shaft away from the motor, the tubular shaft sleeve is arranged on the outer periphery of the input shaft extension section and can rotate relative to the tubular shaft, and an encoding disk 2 engraved with a combining gear position code and an output shaft speed code is provided on the outer periphery of the tubular shaft.

[0012] Furthermore, an independent information collection chamber is provided for accommodating the encoder disk 1 and the corresponding position sensor 1 and speed sensor 1, as well as the encoder disk 2 and the corresponding position sensor 2 and speed sensor 2, and the tubular shaft and the sleeved input shaft extension pass through the wall of the information collection chamber.

[0013] Furthermore, a position sensor 1 and a speed sensor 1 are respectively arranged on the side wall of the information collection chamber, which are aligned with the internal tooth slot position code and the input shaft speed code; a hanging mounting plate is arranged on the top wall of the information collection chamber, and a position sensor 2 and a speed sensor 2 are arranged on the mounting plate; An oil seal 1 is arranged between the tubular shaft and the input shaft extension section, and an oil seal 2 is arranged between the tubular shaft and the wall of the information collection chamber.

[0014] An air-liquid flow channel connected to the space inside the gearbox case is provided at the bottom of the information collection chamber, which is used to balance the air pressure between the information collection chamber and the space inside the gearbox case and to discharge the accumulated oil in the information collection chamber. Beneficial Effects

[0015] 1. Smooth gear shifting, no setbacks, no abnormal noise, and smooth power connection; 2. The internal gear ring replaces the synchronizer, with a simple structure and durability; 3. The information collection components are centrally set, and the setting position does not interfere with the wheel axles and splashing lubricating oil in the gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a simplified structural diagram of the gearbox shifting mechanism; Figure 2 for Figure 1 A partial schematic diagram of Figure 3 It is a three-dimensional schematic diagram of the spline gear, the combined gear and the inner gear ring on the input shaft; Figure 4 It is a three-dimensional schematic diagram of the assembly of the spline gear, the coupling gear and the inner gear ring on the input shaft. The double-headed arrow in the figure indicates that the inner gear ring can slide left and right; Figure 5 for Figure 4 A three-dimensional schematic diagram of the output shaft extension terminal and the tubular shaft terminal being respectively equipped with a first encoding disc and a second encoding disc; Figure 6 The invention relates to a transmission shift mechanism of the prior art which serves as the basis for improvement of the present application.

[0017] In the figure: 1. input shaft; 101. input shaft extension; 2. output shaft; 3. spline gear; 4. inner ring gear; 401. tooth groove; 5. combined gear; 501. combined gear tooth; 6. driving gear; 7. driven gear; 8. position sensor 1; 9. position sensor 2; 10. speed sensor 1; 11. speed sensor 2; 12. inner tooth groove position coding; 13. combined gear tooth position coding; 14. input shaft speed coding; 15. output shaft speed coding; 16. tubular shaft; 17. encoder disk 1; 18. encoder disk 2; 19. information collection chamber; 20. mounting plate; 21. oil seal 1; 22. oil seal 2; 23. gas-liquid flow channel; 24. motor 1; 25. motor 2; 26. synchronizer; 100. gearbox. DETAILED DESCRIPTION

[0018] In order to clearly describe and understand the present application, a simple four-speed gearbox shift structure is taken as an example for explanation below.

[0019] like Figure 6As shown, the gear-advancing structure includes: an input shaft 1 connected to a motor 24, four coupling gears 5 mounted on the input shaft 1 through bearings, four driving gears 6 respectively fixed to the four coupling gears 5, two spline gears 3 fixedly mounted on the input shaft 1, synchronizers 26 (existing technology) respectively mounted on the two spline gears 3, an output shaft 2, and four driven gears 7 fixedly mounted on the output shaft 2.

[0020] Next, we will further explain the structural relationship and the functions that can be achieved of the above-mentioned components according to the left and right directions of the view. At the same time, in the accompanying drawings, D1, D2, D3, and D4 are used to represent the first gear, second gear, third gear, and fourth gear to which the four driving gears 6 and the four driven gears 7 belong respectively. D12 is used to represent the first gear and second gear that can be synchronously connected with the synchronizer 26. D34 is used to represent the third gear and fourth gear that can be synchronously connected with the synchronizer 26.

[0021] The motor 24 is used to drive the input shaft 1; the four combined gears 5 are respectively the combined gears 5 of the first gear, the second gear, the third gear and the fourth gear from left to right; the four driving gears 6 are respectively the driving gears 6 of the first gear, the second gear, the third gear and the fourth gear from left to right; the four driven gears 7 are respectively the driven gears 7 of the first gear, the second gear, the third gear and the fourth gear from left to right; the four driving gears 6 are respectively meshed with the four driven gears 7; the spline gear 3 and the combined gear 5 have the same diameter and number of teeth; the combined gears 5 of the first gear and the second gear are arranged opposite to each other, and a spline gear 3 and a same gear meshed with the spline teeth through the internal teeth are arranged between the two. The synchronizer 26 can slide left and right. It slides to the left to mesh with the combined gear 5 and the spline gear 3 of the first gear at the same time to enter the first gear, and slides to the right to mesh with the combined gear 5 and the spline gear 3 of the second gear at the same time to enter the second gear; the combined gears 5 of the third gear and the fourth gear are arranged opposite to each other, and a spline gear 3 and a synchronizer 26 meshing with the spline teeth through internal teeth are arranged between the two. The synchronizer 26 can slide left and right. It slides to the left to mesh with the combined gear 5 and the spline gear 3 of the third gear at the same time to enter the third gear, and slides to the right to mesh with the combined gear 5 and the spline gear 3 of the fourth gear at the same time to enter the fourth gear.

[0022] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1

[0023] like Figure 1As shown in FIG. 4 , a shifting method based on the corresponding position of the gear teeth and the tooth groove of the shifting gear comprises a transmission control unit TCU, an actuator for shifting, an inner gear ring 4 with an internal tooth groove 401 is provided to replace the synchronizer 26, a position sensor 18 for judging the position of the internal tooth groove 401 of the inner gear ring 4 and a position sensor 29 for judging the position of the combined gear teeth 501 of the combined gear 5 are provided, the TCU controls the speed of the motor 24 to realize the axial alignment of the combined gear teeth 501 with the inner tooth groove 401 and to make the speed of the spline gear 3 close to or equal to the speed of the combined gear 5, and the TCU controls the actuator to push the inner gear ring 4 in the neutral state to shift to the combined gear 5. Here, the speed of the spline gear 3 close to the speed of the combined gear 5 refers to a high degree of closeness, and it is not necessary to achieve complete equality in actual application. The inner gear ring 4 only has the inner tooth groove 401 that can be axially inserted into the spline gear teeth of the spline gear 3 and the combined gear teeth 501 of the combined gear 5, and the structure is greatly simplified compared with the complex synchronizer 26. In this way, when shifting, since the inner gear ring 4 slides toward the coupling gear 5 when the coupling gear 501 is axially aligned with the inner tooth groove 401 and the speed of the spline gear 3 is highly close to or equal to the speed of the coupling gear 5 to shift, there will be no relative friction between the end of the inner gear ring 4 and the end of the coupling gear 5, and there will be no impact between the coupling gear 501 and the groove wall of the inner tooth groove 401 (actually the inner teeth of the inner gear ring 4), making the gear shifting smooth and smooth, without setbacks or abnormal noises, and the power connection is smooth. At the same time, the structure of the inner gear ring 4 is very simple and durable.

[0024] In order to make the gear shifting smoother, the ends of the gear teeth 501 and the inner tooth grooves 401 are appropriately chamfered to provide guidance.

[0025] It should be noted here that the existing control technology is fully capable of achieving the axial alignment of the coupling gear teeth 501 with the internal tooth grooves 401 and the rotation speed of the spline gear 3 being highly close to or equal to the rotation speed of the coupling gear 5 .

[0026] The above method further includes setting a rotation speed sensor 10 for determining the rotation speed of the input shaft and setting a rotation speed sensor 11 for determining the rotation speed of the output shaft.

[0027] The above-mentioned shifting method can be further implemented by taking the following measures: 1. Using the structural features that all spline gears 3 are rigidly connected to the input shaft 1, all spline gears 3 have the same number of teeth and specifications, and all spline gears 3 are rigidly sleeved with all inner gear rings 4, an inner tooth groove position code 12 rotating around the input shaft 1 is set on any component of the input shaft 1, and the set inner tooth groove position code 12 reflects the position information of the inner tooth grooves 401 of all inner gear rings 4, and the information is entered into the TCU, and the position sensor 8 is enabled to read the inner tooth groove position code 12; By utilizing the above structural features, an input shaft speed code 14 is set on the component where the internal tooth slot position code 12 is set, and the input shaft speed code 14 is used to reflect the speed information of all the internal gear rings 4, and the information reflected by the input shaft speed code 14 is recorded into the TCU, and the speed sensor 10 can read the information of the input shaft speed code 14; Second, utilizing the structural features that all the shift driven gears 7 are rigidly connected to the output shaft 2, all the shift driven gears 7 are respectively in constant mesh with the corresponding shift driving gears 6 sleeved on the output shaft 2, and all the shift driving gears 6 are rigidly connected to their respective coupling gears 5, selecting any coupling gear 5 to set a coding component, setting a coupling gear tooth position code 13 on the coding component, and the set coupling gear tooth position code 13 reflects the position information of the coupling gear teeth 501 of all the coupling gears 5, and the information is entered into the TCU, and the position sensor 2 9 can read the information of the coupling gear tooth position code 13; The output shaft speed coder 15 is set on the encoding component by utilizing the above structural features. The output shaft speed coder 15 reflects the speed information of all the coupled gears 5, enters the information into the TCU, and enables the speed sensor 2 11 to read the information of the output shaft speed coder 15.

[0028] Simply put, through the above two groups of structural features, we can determine: The spatial position of each inner tooth groove 401 of each inner gear ring 4 is fixed relative to a coding symbol. The spatial position of each inner tooth groove 401 of each inner gear ring 4 and the corresponding coding symbol are entered into the TCU. As long as the position sensor 8 determines the position and displacement of the coding symbol, the TCU can determine the position and displacement of each inner tooth groove 401 of each inner gear ring 4. The spatial position of each coupling tooth 501 of each coupling gear 5 is fixed relative to a coding symbol. The spatial position of each coupling tooth 501 of each coupling gear 5 and the corresponding coding symbol are entered into the TCU. As long as the position sensor 8 determines the position and displacement of the coding symbol, the TCU can determine the position and displacement of each coupling tooth 501 of each coupling gear 5. It is easy to understand that the speed of the input shaft is the speed of all spline gears 3; The rotation speed of each combined gear 5 can be obtained by real-time calculation of the coding information obtained by the TCU through the ratio of the number of teeth of the driving gear 6 and the driven gear 7 of its gear position. Therefore, only one coding information is needed to obtain the rotation speed information of all the combined gears 5.

[0029] Here are some things to note: 1. The above-mentioned measure 1 states that "an internal tooth position coder 12 rotating around the input shaft 1 is provided on any component of the input shaft 1, and the provided internal tooth position coder 12 reflects the position information of the internal tooth slots 401 of all the inner gear rings 4, and the information is entered into the TCU, and the position sensor 8 is enabled to read the internal tooth position coder 12". Since the motor 24 is connected to the input shaft 1, it includes a coder provided in the motor 24 that can reflect the positions of all the internal tooth slots 401 and a position sensor 8 provided in the motor 24 (provided by the motor 1).

[0030] 2. The above-mentioned measure 2 states that "select any one of the coupling gears 5 to set a coding component, set a coupling gear tooth position code 13 on the coding component, and use the set coupling gear tooth position code 13 to reflect the position information of the coupling gear teeth 501 of all the coupling gears 5, enter the information into the TCU, and enable the position sensor 2 9 to read the information of the coupling gear tooth position code 13". If the output shaft 2 is directly connected to the motor 2, according to the structural features described in the above-mentioned measure 2, it includes a code that can reflect the position of all the coupling gear teeth 501 and a position sensor 2 9 (built-in to the motor 2) set in the motor 25.

[0031] According to the above method, the gear shifting can be implemented in the following steps: 1. The TCU confirms that the inner gear ring 4 has been retracted and is in a neutral position where it is only sleeved on the outer periphery of the spline gear 3. If it has not been retracted, the actuator is instructed to push the inner gear ring 4 to retract; 2. The TCU controls the motor 1 24 to drive the input shaft 1 by combining the data transmitted by the speed sensor 10 and the speed sensor 2 11, so that the speed of the inner gear ring 4 is close to the speed of the combined gear 5; 3. The TCU controls and confirms that the combined gear teeth 501 are axially aligned with the inner tooth groove 401 by the data transmitted by the combined position sensor 1 8 and the position sensor 2 9; 4. At the moment when it is confirmed that the coupling gear 501 is axially aligned with the inner tooth groove 401 , the TCU instructs the actuator to push the inner gear ring 4 to shift gears toward the coupling gear 5 .

[0032] As described in the above step 4, at the moment when it is confirmed that the coupling gear 501 is axially aligned with the inner tooth groove 401, the TCU controls the motor 24 to drive the input shaft 1, so that the rotation speed of the inner ring gear 4 is equal to the rotation speed of the coupling gear 5, and then the TCU instructs the actuator to push the inner ring gear 4 to shift gears toward the coupling gear 5.

[0033] It should be noted that the output shaft 2 is connected to the wheels, and except for starting and reverse shifting, the output shaft 2 is in a rotating state. In order to increase the smoothness of the shifting operation and the continuity of the power output, the output shaft 2 is generally connected to the motor 25. When the gear is shifted in the driving state, the motor 25 directly outputs limited power to the output shaft 2. Embodiment 2

[0034] like Figure 1 , 2 As shown in Figure 5, preferably, an input shaft 1 is selected to extend from one end of the input shaft away from the motor 24 to form an input shaft extension section 101, and an encoding disk 17 engraved with an internal tooth position code 12 and an input shaft speed code 14 is provided at the end of the input shaft extension section 101, and the internal tooth position code 12 and the input shaft speed code 14 are read by the position sensor 8 and the speed sensor 10 respectively; a tubular shaft 16 fixed to the coupling gear 5 is selected to be provided at the end of the input shaft 1 away from the motor 24, and the tubular shaft 16 is sleeved on the outer periphery of the input shaft extension section 101 and can rotate relative to the tubular shaft 16, and an encoding disk 18 engraved with a coupling gear position code 13 and an output shaft speed code 15 is provided on the outer periphery of the tubular shaft 16, and the internal tooth position code 12 and the input shaft speed code 14 are read by the position sensor 9 and the speed sensor 11 respectively. In this way, all information collection is concentrated at the terminal of the input shaft 1, which can avoid the complex rotating axle in the gearbox, so that the encoding component, sensor and its signal line can be set in an area that does not interfere with the rotating axle. Embodiment 3

[0035] It is a further improvement of the second embodiment.

[0036] like Figure 1 , 2 As shown in Figure 5, an independent information collection chamber 19 is provided to accommodate the encoder disk 17 and the position sensor 1 8 and the speed sensor 1 10, as well as the encoder disk 2 18 and the position sensor 2 9 and the speed sensor 2 11, and the tubular shaft 16 and the set input shaft extension section 101 pass through the wall of the information collection chamber 19. Since the environment inside the gearbox is an environment where lubricating oil splashes, almost all rotating parts rely on Feijian lubricating oil for lubrication, and the independent information collection chamber 19 is provided to prevent all information collection parts from being covered by lubricating oil and being unrecognizable.

[0037] A position sensor 8 and a speed sensor 10 are arranged on the side walls of the information collection chamber 19 and are respectively aligned with the internal tooth position code 12 and the input shaft speed code 14; a hanging mounting plate 20 is arranged on the top wall of the information collection chamber 19, and a position sensor 9 and a speed sensor 11 are arranged on the mounting plate 20. Furthermore, an oil seal 21 is provided between the tubular shaft 16 and the input shaft extension 101, and an oil seal 22 is provided between the tubular shaft 16 and the wall of the information collection chamber 19, so as to prevent the lubricating oil from entering the information collection chamber 19 along the tubular shaft 16 and the input shaft.

[0038] Furthermore, a gas-liquid flow channel 23 connected to the space inside the gearbox 100 is provided at the bottom of the information collection chamber 19 for balancing the air pressure between the information collection chamber 19 and the space inside the gearbox 100 and discharging the accumulated oil in the information collection chamber 19 .

[0039] The above embodiments are only used to more clearly describe the present invention and cannot be regarded as limiting the protection scope of the present invention. Any modifications in equivalent forms should be regarded as falling within the protection scope of the present invention.

Claims

1. A shifting method based on the corresponding position of the gear teeth and the tooth groove of the shifting gear, comprising a transmission control unit TCU and an actuator for shifting, characterized in that: An inner gear ring (4) having an inner tooth groove (401) is provided to replace the synchronizer, and a position sensor 1 (8) for determining the position of the inner tooth groove (401) of the inner gear ring (4) and a position sensor 2 (9) for determining the position of the coupling gear teeth (501) of the coupling gear (5) are provided. The TCU controls the rotation speed of the motor 1 (24) to achieve axial alignment of the coupling gear teeth (501) with the inner tooth groove (401) and to make the rotation speed of the spline gear (3) close to or equal to the rotation speed of the coupling gear (5). The TCU instructs an actuator to push the inner gear ring (4) in a neutral state to shift gears toward the coupling gear (5).

2. The shifting method based on the correspondence between the gear teeth and the tooth groove positions of the shifting gear according to claim 1, characterized in that: It also includes a rotation speed sensor 1 (10) for determining the rotation speed of the input shaft and a rotation speed sensor 2 (11) for determining the rotation speed of the output shaft.

3. The shifting method based on the correspondence between the gear teeth and the tooth groove positions of the shifting gear according to claim 2, characterized in that The steps include:

1. The TCU confirms that the inner gear ring (4) has been shifted down and is in a neutral position where it is only mounted on the outer periphery of the spline gear (3). If it has not been shifted down, the actuator is instructed to push the inner gear ring (4) to shift down; 2. The TCU controls the motor 1 (24) to drive the input shaft (1) based on the data transmitted by the speed sensor 1 (10) and the speed sensor 2 (11), so that the speed of the inner gear ring (4) is close to the speed of the combined gear (5); 3. The TCU controls and confirms the axial alignment of the combined gear teeth (501) with the inner tooth groove (401) by using the data transmitted by the combined position sensor 1 (8) and the position sensor 2 (9); 4. At the moment when it is confirmed that the coupling gear (501) is axially aligned with the inner tooth groove (401), the TCU instructs the actuator to push the inner gear ring (4) toward the coupling gear (5) to shift into gear.

4. The shifting method based on the correspondence between the gear teeth and the tooth groove positions of the shifting gear according to claim 3, characterized in that: In step 4, at the moment when it is confirmed that the coupling gear (501) is axially aligned with the inner tooth groove (401), the TCU controls the motor 1 (24) to drive the input shaft (1) so that the rotation speed of the inner gear ring (4) is equal to the rotation speed of the coupling gear (5), and then the TCU instructs the actuator to push the inner gear ring (4) toward the coupling gear (5) to shift gear.

5. The shifting method based on the corresponding position of the shifting gear teeth and the tooth grooves as claimed in claim 2, characterized in that Take the following measures:

1. Utilizing the structural features that all spline gears (3) are rigidly connected to the input shaft (1), all spline gears (3) have the same number of teeth and specifications, and all spline gears (3) are rigidly sleeved with all inner gear rings (4), an inner tooth groove position code (12) rotating around the input shaft (1) is set on any component of the input shaft (1), and the set inner tooth groove position code (12) reflects the position information of the inner tooth grooves (401) of all inner gear rings (4), the information is entered into the TCU, and the position sensor 1 (8) is enabled to read the inner tooth groove position code (12); By utilizing the above structural features, an input shaft speed code (14) is set on the component where the internal tooth slot position code (12) is set, and the input shaft speed code (14) is used to reflect the speed information of all the internal gear rings (4), and the information reflected by the input shaft speed code (14) is recorded into the TCU, and the speed sensor 1 (10) is enabled to read the information of the input shaft speed code (14); Second, utilizing the structural features that all the shift driven gears (7) are rigidly connected to the output shaft (2), all the shift driven gears (7) are respectively in constant mesh with the corresponding shift driving gears (6) sleeved on the output shaft (2), and all the shift driving gears (6) are rigidly connected to their respective coupling gears (5), selecting any coupling gear (5) to set a coding component, setting a coupling gear tooth position code (13) on the coding component, and the set coupling gear tooth position code (13) reflects the position information of the coupling gear teeth (501) of all the coupling gears (5), and the information is entered into the TCU, and the position sensor 2 (9) is enabled to read the information of the coupling gear tooth position code (13); By utilizing the above structural features, an output shaft speed code (15) is arranged on the coding component, and the output shaft speed code (15) reflects the speed information of all the coupled gears (5), and the information is input into the TCU, so that the speed sensor 2 (11) can read the information of the output shaft speed code (15).

6. The shifting method based on the correspondence between the gear teeth and the tooth groove positions of the shifting gear according to claim 5, characterized in that: An input shaft (1) is selected to extend from one end of the input shaft (1) away from the motor (24) to form an input shaft extension section (101), and an encoding disk (17) engraved with an internal tooth position code (12) and an input shaft speed code (14) is provided at the end of the input shaft extension section (101); a coupling gear (5) is selected to be provided at one end of the input shaft (1) away from the motor (24) to provide a tubular shaft (16) fixed to the coupling gear (5), the tubular shaft (16) is sleeved on the outer circumference of the input shaft extension section (101) and can rotate relative to the tubular shaft (16), and an encoding disk (2) (18) engraved with a coupling gear position code (13) and an output shaft speed code (15) is provided on the outer circumference of the tubular shaft (16).

7. The shifting method based on the correspondence between the gear teeth and the tooth groove positions of the shifting gear according to claim 6, characterized in that: An independent information collection chamber (19) is provided for accommodating the first encoder disk (17) and the corresponding first position sensor (8), the first rotation speed sensor (10), as well as the second encoder disk (18) and the corresponding second position sensor (9), the second rotation speed sensor (11); the tubular shaft (16) and the sleeved input shaft extension section (101) pass through the wall of the information collection chamber (19).

8. The shifting method based on the correspondence between the gear teeth and the tooth groove positions of the shifting gear according to claim 7, characterized in that: Position sensor 1 (8) and speed sensor 1 (10) are arranged on the side wall of the information collection chamber (19) and are respectively aligned with the internal tooth groove position code (12) and the input shaft speed code (14); a suspended mounting plate (20) is arranged on the top wall of the information collection chamber (19), and position sensor 2 (9) and speed sensor 2 (11) are arranged on the mounting plate (20).

9. The shifting method based on the correspondence between the gear teeth and the tooth groove positions of the shifting gear according to claim 7, characterized in that: An oil seal 1 (21) is provided between the tubular shaft (16) and the input shaft extension section (101), and an oil seal 2 (22) is provided between the tubular shaft (16) and the wall of the information collection chamber (19).

10. The shifting method based on the correspondence between the gear teeth and the tooth groove positions of the shifting gear according to claim 7, characterized in that: A gas-liquid flow channel (23) communicating with the space inside the gearbox (100) is provided at the bottom of the information collection chamber (19) for balancing the gas pressure between the information collection chamber (19) and the space inside the gearbox (100) and for discharging accumulated oil in the information collection chamber (19).

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