Method for acquiring rotating speed information and position information of related gear of gear shifting mechanism

Abstract

The invention discloses a method for acquiring rotating speed information and position information of related gears of a gear shifting mechanism, which comprises the following steps of: arranging a transmission control unit (TCU), a position sensor I, a rotating speed sensor I, a position sensor II and a rotating speed sensor II; a group of internal tooth space position codes reflecting internal tooth space position information, a group of combined gear tooth position codes reflecting combined gear tooth position information, a group of input shaft rotating speed codes reflecting input shaft rotating speed information and a group of output shaft rotating speed codes reflecting one combined gear rotating speed information are arranged; after being read by the first position sensor, the second position sensor, the first rotating speed sensor and the second rotating speed sensor and input into the TCU, the TCU can obtain position information reflecting all the inner tooth grooves and all the combined gear teeth and rotating speed information reflecting all the inner gear rings and all the combined gears. The gear shifting mechanism has the advantage that necessary position information and rotating speed information can be obtained in a simple mode from the gear shifting mechanism with a complex structure relation and a complex transmission relation.

Description

Technical Field

[0001] The invention relates to a method for obtaining gear speed information and position information related to a gear shift mechanism, and belongs 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.

[0005] In order to achieve precise gear shifting and obtain smooth power output, the existing technology already has a transmission control unit TCU. When using TCU in the industry, there is no shortage of acquisition of wheel shaft speed data in the transmission, but the technology involved in determining and controlling the position of the gear teeth of the shifting gear has not yet been discovered.

[0006] In order to solve the above problems, our company has carried out relevant research, which also involves the problem of how to obtain the speed data of the shift gear and the timely position data of the shift gear teeth. Since the shifting involves multiple levels and multiple sets of shift gears, the speeds and numbers of teeth of the multiple levels of shift gears and even the shift gears in the same set are different, and the space inside the gearbox is a space where lubricating oil splashes, and all the axle components are rotating at high speed, the relevant sensors and their signal lines cannot be installed normally, resulting in many difficulties in obtaining the speed data of the shift gear and the timely position data of the shift gear teeth. Summary of the invention

[0007] The technical problem to be solved by the present invention is: how to collect the speed information of the shifting gear and the gear tooth position information in the gearbox.

[0008] In view of the above problems, the technical solution proposed by the present invention is: A method for obtaining gear speed information and position information related to a shift mechanism includes setting a transmission control unit TCU. It also includes setting a position sensor 1, a speed sensor 1, a position sensor 2, and a speed sensor 2, utilizing the structural characteristics of the shift mechanism, by setting a group of internal tooth groove position codes reflecting the position information of an internal tooth groove of an internal gear ring, a group of combined gear tooth position codes reflecting the position information of a combined gear tooth of a combined gear, a group of input shaft speed codes reflecting the input shaft speed information, and a group of output shaft speed codes reflecting the speed information of a combined gear. After being read by the position sensor 1, the position sensor 2, the speed sensor 1, and the speed sensor 2 and input into the TCU respectively, the TCU can obtain the position information reflecting all internal tooth grooves and all combined gear teeth, as well as the speed information of all internal gear rings and all combined gears.

[0009] The implementation of the above method includes the following measures: 1. Utilizing 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 inner gear rings, an internal tooth groove position code that rotates around the input shaft is set on any component of the input shaft, and the set internal tooth groove position code reflects the position information of the internal tooth grooves of all inner gear rings, the information is entered into the TCU, and the position sensor 1 is enabled to read the internal tooth groove position code; an input shaft speed code is set on the component where the internal tooth groove position code is set, and the input shaft speed code is used to reflect the speed information of all inner gear rings, the information reflected by the input shaft speed code is entered into the TCU, and the speed sensor 1 is enabled to 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 constantly meshed with the corresponding shift driving gears sleeved on the output shaft, and all the shift driving gears are rigidly connected to their respective combining gears, an encoding component is selected to set a combining gear, a combining gear tooth position code is set on the encoding component, the position information of the combining gear teeth of all the combining gears is reflected by the set combining gear tooth position code, the information is entered into the TCU, and the position sensor 2 is enabled to read the information of the combining gear tooth position code; an output shaft speed code is set on the encoding component, the output shaft speed code is used to reflect the speed information of all the combining gears, the information is entered into the TCU, and the speed sensor 2 is enabled to read the information of the output shaft speed code.

[0010] Furthermore, the input shaft terminal is extended to form an input shaft extension section, and an encoding disk 1 engraved with an internal tooth groove position code and an input shaft speed code is set at the end of the input shaft extension section; a tubular shaft fixed with the combining gear at the input shaft terminal is selected, the tubular shaft sleeve is 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 tooth position code and an output shaft speed code is set on the outer periphery of the tubular shaft.

[0011] Furthermore, an independent information collection chamber is provided for accommodating the encoder disk 1 and the corresponding position sensor 1, the rotation speed sensor 1, as well as the encoder disk 2 and the corresponding position sensor 2, the rotation speed sensor 2, and the tubular shaft and the set input shaft extension section pass through the wall of the information collection chamber.

[0012] Furthermore, a position sensor 1 and a speed sensor 1 are arranged on the side wall of the information collection chamber, which are respectively aligned with the internal tooth groove position code and the input shaft speed code.

[0013] Furthermore, a suspended mounting plate is arranged on the top wall of the information collection chamber, and a second position sensor and a second rotation speed sensor are arranged on the mounting plate.

[0014] Furthermore, an oil seal 1 is provided between the tubular shaft and the input shaft extension section, and an oil seal 2 is provided between the tubular shaft and the wall of the information collection chamber.

[0015] Furthermore, a through hole 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.

[0016] Furthermore, the opening of the through hole in the information collection chamber is arranged at the bottom of the information collection chamber, and the opening height of the through hole in the space inside the gearbox case is lower than the opening of the space inside the gearbox case.

[0017] Furthermore, the information collection chamber is arranged outside the housing of the gearbox. Beneficial Effects

[0018] 1. Ability to obtain necessary position information and speed information from a shift mechanism with complex structural and transmission relationships in a concise manner; 2. The information collection area avoids the space inside the gearbox where it is difficult to set up collection components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 disassembly of the spline gear, the combined gear and the inner ring gear 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 A simplified schematic diagram of arranging the information collection chamber outside the gearbox; Figure 7 The invention relates to a transmission shift mechanism of the prior art which serves as the basis for improvement of the present application.

[0020] In the figure: 1. input shaft; 101. input shaft extension; 2. output shaft; 3. spline gear; 4. internal gear ring; 401. internal tooth groove; 5. combined gear; 501. combined gear teeth; 6. driving gear; 7. driven gear; 8. position sensor 1; 9. position sensor 2; 10. speed sensor 1; 11. speed sensor 2; 12. internal tooth groove position coding; 13. combined gear tooth position coding; 14. input shaft speed coding; 15. output shaft speed coding; 16. encoding disk 1; 17. encoding disk 2; 18. tubular shaft; 19. information collection chamber; 20. mounting plate; 21. through hole; 22. oil seal 1; 23. oil seal 2; 24. synchronizer; 100. gearbox. DETAILED DESCRIPTION

[0021] 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.

[0022] like Figure 7As shown, the gear-advancing structure includes: an input shaft 1 connected to the motor, 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 24 (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.

[0023] 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 24, and D34 is used to represent the third gear and fourth gear that can be synchronously connected with the synchronizer 24.

[0024] The motor 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 synchronous gear meshing with the spline teeth through internal teeth are arranged between the two. The synchronizer 24 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 24 that meshes with the spline teeth through internal teeth are arranged between the two. The synchronizer 24 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.

[0025] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1

[0026] like Figure 1 , 2As shown in Figures 3 and 5, a method for obtaining gear speed information and position information related to a shifting mechanism comprises setting a transmission control unit TCU, and also comprising setting a position sensor 18, a speed sensor 10, a position sensor 29, and a speed sensor 21. By utilizing the structural characteristics of the shifting mechanism, a group of inner tooth groove position codes 12 reflecting the position information of an inner tooth groove 401 of an inner gear ring 4, a group of combined gear tooth position codes 13 reflecting the position information of a combined gear tooth 501 of a combined gear 5, a group of input shaft speed codes 14 reflecting the input shaft speed information, and a group of output shaft speed codes 15 reflecting the speed information of a combined gear 5 are set. After being read by the position sensor 18, the position sensor 29, the speed sensor 10, and the speed sensor 21 respectively and input into the TCU, the TCU can obtain the position information reflecting the inner tooth grooves 401 of all inner gear rings 4, the position information of the combined gear teeth 501 of all combined gears 5, the speed information of all inner gear rings 4, and the speed information of all combined gears 5. In this way, necessary position information and rotation speed information can be obtained in a concise manner from a shift mechanism having complex structural relationships and transmission relationships.

[0027] The above method includes 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 8 is enabled to read the inner tooth groove position code 12; an input shaft speed code 14 is set on the component where the inner tooth groove position code 12 is set, and the input shaft speed code 14 is used to reflect the speed information of all inner gear rings 4, the information reflected by the input shaft speed code 14 is entered into the TCU, and the speed sensor 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 constantly meshed 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, select any coupling gear 5 to set a coding component, set 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, 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; set an output shaft speed code 15 on the coding component, and the output shaft speed code 15 reflects the speed information of all the coupling gears 5, the information is entered into the TCU, and the speed sensor 2 11 can read the information of the output shaft speed code 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] Preferably, the input shaft 1 terminal is selected to extend to form an input shaft extension section 101, and a code disk 16 engraved with an internal tooth position code 12 and an input shaft speed code 14 is set at the end of the input shaft extension section 101; the coupling gear 5 at the input shaft 1 terminal is selected to set a tubular shaft 18 fixed to the coupling gear 5, the tubular shaft 18 is sleeved on the outer periphery of the input shaft extension section 101 and can rotate relative to the tubular shaft 18, and a code disk 2 17 engraved with a coupling gear position code 13 and an output shaft speed code 15 is set on the outer periphery of the tubular shaft 18. In this way, all information collection is concentrated at the terminal of the input shaft 1, which can avoid the complex rotating wheel shaft 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 wheel shaft. Embodiment 2

[0030] like Figure 2—5, which is a further improvement of the first embodiment. An independent information collection chamber 19 is provided to accommodate the encoder disc 1 16 and the position sensor 1 8 and the speed sensor 1 10, as well as the encoder disc 2 17 and the position sensor 2 9 and the speed sensor 2 11, and the tubular shaft 18 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.

[0031] A position sensor 8 and a speed sensor 10 are arranged on the side wall of the information acquisition chamber 19 and are aligned with the internal tooth position code 12 and the input shaft speed code 14 respectively.

[0032] A suspended mounting plate 20 is provided on the top wall of the information collection chamber 19 , and a position sensor 9 and a rotation speed sensor 11 are provided on the mounting plate 20 .

[0033] An oil seal 22 is provided between the tubular shaft 18 and the input shaft extension 101, and an oil seal 23 is provided between the tubular shaft 18 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 18 and the input shaft.

[0034] A through hole 21 is provided at the bottom of the information collection chamber 19 and connected to the space inside the gearbox 100, which is used to balance the air pressure between the information collection chamber 19 and the space inside the gearbox 100, thereby eliminating the pressure difference between the inside and outside of the oil seal 1 22 and the oil seal 2 23, and can greatly reduce the possibility of the lubrication in the gearbox 100 breaking through the oil seal 1 22 and the oil seal 2 3 due to the high pressure caused by the oil temperature rise and entering the information collection chamber 19.

[0035] Furthermore, the opening of the through hole 21 in the information collection chamber 19 is arranged at the bottom of the information collection chamber 19, and the opening height of the through hole 21 in the space inside the gearbox 100 is lower than the opening of the space inside the gearbox 100. In this way, if lubricating oil enters the information collection chamber 19, the accumulated oil in the information collection chamber 19 can be discharged. Embodiment 3

[0036] like Figure 6 As shown, the difference from the first embodiment is that the information collection chamber 19 is arranged outside the housing of the gearbox 100 .

[0037] 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 method for obtaining gear speed information and position information related to a gear shift mechanism, comprising setting a transmission control unit TCU, characterized in that: The invention also includes setting a position sensor 1 (8), a speed sensor 1 (10), a position sensor 2 (9), and a speed sensor 2 (11). By utilizing the structural characteristics of the shift mechanism, a group of internal tooth groove position codes (12) reflecting the position information of an internal tooth groove (401) of an internal gear ring (4), a group of combined gear tooth position codes (13) reflecting the position information of a combined gear tooth (501) of a combined gear (5), a group of input shaft speed codes (14) reflecting the input shaft speed information, and a group of output shaft speed codes (15) reflecting the speed information of a combined gear (5) are set. After being read by the position sensor 1 (8), the position sensor 2 (9), the speed sensor 1 (10), and the speed sensor 2 (11) and input into a TCU, the TCU can obtain the position information reflecting all the internal tooth grooves (401) and all the combined gear teeth (501), as well as the speed information of all the internal gear rings (4) and all the combined gears (5).

2. The method for obtaining the gear speed information and position information related to the gear shift mechanism according to claim 1, characterized in that These measures include:

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), 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 recorded in the TCU, and the position sensor 1 (8) is enabled to read the inner tooth groove position code (12); an input shaft speed code (14) is set on the component where the inner tooth groove position code (12) is set, the input shaft speed code (14) is used to reflect the speed information of all inner gear rings (4), the information reflected by the input shaft speed code (14) is recorded in 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); An output shaft speed coder (15) is provided on the coding component, and the output shaft speed coder (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 coder (15).

3. The method for obtaining the speed information and position information of the gears related to the shifting mechanism according to claim 2, characterized in that: The input shaft (1) terminal is selected to extend to form an input shaft extension section (101), and an encoding disk (16) engraved with an internal tooth groove 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 at the input shaft (1) terminal to provide a tubular shaft (18) fixed to the coupling gear (5), the tubular shaft (18) is sleeved on the outer circumference of the input shaft extension section (101) and can rotate relative to the tubular shaft (18), and an encoding disk (17) 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 (18).

4. The method for obtaining the speed information and position information of the gears related to the shifting mechanism according to claim 3, characterized in that: An independent information collection chamber (19) is provided for accommodating the first encoder disk (16) and the corresponding first position sensor (8), the first rotation speed sensor (10), as well as the second encoder disk (17) and the corresponding second position sensor (9), the second rotation speed sensor (11); the tubular shaft (18) and the sleeved input shaft extension section (101) pass through the wall of the information collection chamber (19).

5. The method for obtaining the speed information and position information of the gears related to the shifting mechanism according to claim 4, characterized in that: A position sensor 1 (8) and a rotation speed sensor 1 (10) are arranged on the side wall of the information collection chamber (19) and are aligned with the internal tooth groove position code (12) and the input shaft rotation speed code (14) respectively.

6. The method for obtaining the speed information and position information of the gears related to the shifting mechanism according to claim 4, characterized in that: A suspended mounting plate (20) is arranged on the top wall of the information collection chamber (19), and a second position sensor (9) and a second rotation speed sensor (11) are arranged on the mounting plate (20).

7. The method for obtaining the speed information and position information of the gears related to the shifting mechanism according to claim 4, characterized in that: An oil seal 1 (22) is provided between the tubular shaft (18) and the input shaft extension section (101), and an oil seal 2 (23) is provided between the tubular shaft (18) and the wall of the information collection chamber (19).

8. The method for obtaining the speed information and position information of the gears related to the shifting mechanism according to claim 4, characterized in that: A through hole (21) communicating with the space inside the gearbox (100) is provided at the bottom of the information collection chamber (19) and is used to balance the air pressure between the information collection chamber (19) and the space inside the gearbox (100).

9. The method for obtaining the speed information and position information of the gears related to the gear shift mechanism according to claim 8, characterized in that: The opening of the through hole (21) in the information collection chamber (19) is arranged at the bottom of the information collection chamber (19), and the opening height of the through hole (21) in the space inside the gearbox (100) is lower than the opening height of the space inside the gearbox (100).

10. The method for obtaining the speed information and position information of the gears related to the shifting mechanism according to claim 4, characterized in that: The information collection chamber (19) is arranged outside the housing of the gearbox (100).

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