CN114248622A

CN114248622A - Front wheel speed adjusting device and rear wheel speed adjusting device of intelligent automobile

Info

Publication number: CN114248622A
Application number: CN202111655278.9A
Authority: CN
Inventors: 邓小亮; 黄海军
Original assignee: Jiangxi Xintian Auto Industry Co ltd
Current assignee: Jiangxi Xintian Auto Industry Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-03-29
Anticipated expiration: 2041-12-31
Also published as: CN114248622B

Abstract

The invention relates to a front and rear wheel speed adjusting device of an intelligent automobile, which comprises a driving motor and a reduction gear box, wherein the reduction gear box comprises an input gear and an output gear which are connected with each other, and the front and rear wheel speed adjusting device also comprises: the position sensor is arranged on a transmission shaft of the output gear; an output shaft of the driving motor is connected with the input gear; the output gear is provided with a spline groove connected with a connecting shaft of an automobile differential; the position sensor is used for detecting the running state of the output gear, feeding back the collected front and rear wheel speed information to the automobile central control system, and judging whether the engine which is normally driven is switched to the front and rear wheel speed adjusting device or not by the automobile central control system. The driving motor adjusts the speed of the front wheel and the rear wheel through the reduction gear box so as to ensure that the speed of the front wheel and the speed of the rear wheel of the automobile are the same.

Description

Front wheel speed adjusting device and rear wheel speed adjusting device of intelligent automobile

Technical Field

The invention relates to the technical field of intelligent automobile wheel speed adjustment, in particular to a front wheel speed adjusting device and a rear wheel speed adjusting device of an intelligent automobile.

Background

With the increasing importance of society on energy and environment, the traditional automobile industry develops towards green and environment-friendly new energy automobiles. Compared with the motor of the traditional automobile, the stepping motor of the new energy automobile has the advantages of compact structure, small volume, independent and controllable driving mode, high power density and the like. The stepping motor of the new energy automobile can simplify the underframe structure of the new energy automobile, and meanwhile, the flexibility of power switching of the new energy automobile is improved.

The gear type transfer motor is widely applied to various all-wheel-driven automobiles, but the speed of the front wheel and the speed of the rear wheel of the automobile cannot be guaranteed to be the same in the driving process of the automobile.

Disclosure of Invention

The invention provides a front wheel speed adjusting device and a rear wheel speed adjusting device of an intelligent automobile, which are used for solving the technical problem that the same speed of the front wheel and the rear wheel of the automobile cannot be guaranteed in the driving process of the automobile.

In some embodiments, a front wheel speed adjusting device and a rear wheel speed adjusting device of an intelligent automobile comprise a driving motor and a reduction gearbox, wherein the reduction gearbox comprises an input gear and an output gear which are connected with each other; the front and rear wheel speed adjusting device further comprises: the position sensor is arranged on a transmission shaft of the output gear; the output shaft of the driving motor is connected with the input gear; the output gear is provided with a spline groove connected with a connecting shaft of an automobile differential; the position sensor is used for detecting the running state of the output gear, feeding back the collected front and rear wheel speed information to the automobile central control system, and judging whether the engine driven normally is switched to the front and rear wheel speed adjusting device by the automobile central control system.

The invention provides a front wheel speed adjusting device and a rear wheel speed adjusting device of an intelligent automobile, which can realize the following technical effects:

during the running process of the automobile, the power of the automobile is distributed to the front wheel and the rear wheel through the gearbox. When the power distributed by the front wheel and the rear wheel is unreasonable, the speeds of the front wheel and the rear wheel of the automobile are different. The speed of the front wheel and the speed of the rear wheel of the automobile can influence the rotating speed of a connecting shaft of an automobile differential mechanism, the connecting shaft is connected with an output gear, and the output gear is connected with a position sensor, so that the position sensor can acquire the speed information of the front wheel and the rear wheel and feed the speed information back to an automobile central control system. The automobile central control system controls the engine to be disconnected from the automobile differential mechanism, and simultaneously controls the driving motor to replace the engine to work. The driving motor adjusts the speed of the front wheel and the rear wheel through the reduction gear box so as to ensure that the speed of the front wheel and the speed of the rear wheel of the automobile are the same. After the driving motor adjusts the speed of the front wheel and the rear wheel, the automobile central control system controls the driving motor to stop working, and simultaneously controls the engine to drive the automobile differential mechanism to work again.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the invention.

Drawings

One or more embodiments are illustrated in drawings corresponding to, and not limiting to, embodiments in which elements having the same reference number designation are identified as similar elements, and in which:

FIG. 1 is a schematic structural diagram of a front and rear wheel speed adjustment apparatus according to an embodiment of the present invention;

FIG. 2 is an exploded view of a front and rear wheel speed adjustment device according to an embodiment of the present invention;

FIG. 3 is an exploded view of a position sensor and output gear according to an embodiment of the present invention;

FIG. 4 is a second exploded view of a position sensor and output gear according to an embodiment of the present invention;

FIG. 5 is an exploded view of a first installation housing provided in accordance with an embodiment of the present invention;

FIG. 6 is an exploded view of a reduction gearbox provided in accordance with an embodiment of the present invention;

FIG. 7 is an exploded view of a second embodiment of the present invention;

FIG. 8 is a schematic view of an initial fixing member provided in accordance with an embodiment of the present invention;

FIG. 9 is an exploded view of a connecting shaft of a front and rear wheel speed adjustment device and a differential mechanism of a vehicle according to an embodiment of the present invention;

fig. 10 is a schematic diagram of a resistor plate according to an embodiment of the present invention.

Reference numerals:

1. a drive motor; 11. an output shaft; 12. a motor housing; 2. a reduction gear box; 21. an input gear; 22. an output gear; 221. a first side surface; 222. a second side surface; 223. a drive shaft; 224. a bump; 225. a spline groove; 23. a transmission gear; 24. installing a box; 241. a first housing; 242. a second housing; 2431. a first notch; 2432. a second notch; 25. a mounting cavity; 251. a first groove; 252. a second groove; 253. a third groove; 254. a fourth groove; 255. a fifth groove; 256. a sixth groove; 257. an edge; 258. a clamping groove; 26. a first shaft; 27. a second shaft; 3. a position sensor; 31. a fixed mount; 311. a turntable cavity; 312. fixing the rod; 32. a turntable; 321. a spring plate; 33. a resistance plate; 330. a main board; 331. a first resistive segment; 332. a second resistive segment; 333. a first carbon film resistor; 334. a second carbon film resistor; 335. a third carbon film resistor; 336. a fourth carbon film resistor; 337. a resistance input terminal; 338. a resistance output end; 339. sharing a public terminal; 34. a protective housing; 41. a clamping hole; 411. a clamping block; 42. mounting holes; 43. rotating the hole; 44. a bearing; 45. a gasket; 46. a joint; 47. a connecting shaft of an automotive differential; 48. recessing; 49. a fixing hole; 5. an initial fixing member; 51. a connecting rod; 52. a spline; 53. a fixed protrusion; 54. a gap; 55. a vertical plate; 61. a rotating shaft; 62. a through hole; 63. and (4) a waterproof ring.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are only for the purpose of explaining the present invention and are not intended to limit the present invention.

Referring to fig. 1 to 5, an embodiment of the present disclosure provides a front and rear wheel speed adjusting device for an intelligent vehicle, where the front and rear wheel speed adjusting device includes a driving motor 1 and a reduction gear box 2, and the reduction gear box 2 includes an input gear 21 and an output gear 22 connected to each other. The front and rear wheel speed adjusting device further comprises a position sensor 3, wherein the position sensor 3 is arranged on a transmission shaft 223 of the output gear 22; the output shaft 11 of the driving motor 1 is connected with the input gear 21; the output gear 22 has a spline groove 225 connected to the connecting shaft 47 of the automobile differential; the position sensor 3 is used for detecting the running state of the output gear 22, feeding back the collected front and rear wheel speed information to the central control system of the automobile, and judging whether the engine driven normally is switched to the front and rear wheel speed adjusting device by the central control system of the automobile.

Optionally, the output shaft 11 of the driving motor 1 penetrates into the reduction gear box 2, the driving motor 1 is fixed on the reduction gear box 2 by bolts, the output shaft 11 of the driving motor 1 is a rectangular shaft (the rectangular shaft is a rectangular shaft with a rectangular cross section perpendicular to the axial direction), the input gear 21 is integrally formed with a clamping hole 41, a clamping block 411 is constructed in the clamping hole 41, the clamping hole 41 of the input gear 21 is matched with the output shaft 11 of the driving motor 1, and the purpose that the driving motor drives the input gear to rotate is achieved by inserting the output shaft of the driving motor into the clamping hole of the input gear. The input gear 21 is engaged with the output gear 22, and the input gear 21 rotates and simultaneously rotates the output gear 22.

Alternatively, the output gear 22 has two sides, one side is a first side 221, the other side is a second side 222, and the first side 221 is opposite to the second side 222. The first side 221 is integrally formed with a transmission shaft 223. A cylindrical protrusion 224 is integrally formed on the second side 222, and a spline groove 225 is integrally formed on the protrusion 224. When the front and rear wheel speed adjusting devices are mounted on a vehicle, the spline grooves 225 are connected with one end of the connecting shaft 47 of the vehicle differential in a snap-fit manner.

Optionally, the position sensor 3 is integrally formed with a clamping hole 41, the shape of the clamping hole 41 of the position sensor 3 is adapted to the shape of the transmission shaft 223 on the first side 221, and the position sensor 3 is connected to the transmission shaft 223 in a clamping manner.

Alternatively, referring to fig. 1, the driving motor 1 includes a planetary gear motor. When the driving motor 1 adopts a planetary gear motor, the occupied space of the planetary gear motor installed on the automobile is small, and the planetary gear motor operates stably.

In some embodiments, referring to fig. 1, the reduction gearbox 2 further comprises a transmission gear 23. The transmission gear 23 is disposed between the input gear 21 and the output gear 22. One end of the transmission gear 23 is meshed with the input gear 21, and the other end of the transmission gear 23 is meshed with the output gear 22. For example, the number of teeth, material, and thickness of the gear of the transmission gear 23 are the same as those of the output gear 22. The rotating speed ratio of the input gear 21 to the output gear 22 ranges from 4 to 5: 1.

Preferably, the ratio of the rotational speed of the input gear 21 to the rotational speed of the output gear 22 is 4.5: 1.

A transmission gear 23 is arranged between the input gear 21 and the output gear 22, and the shape, the number, the material and the thickness of the transmission gear are the same as those of the output gear, so that the transmission gear not only ensures the rotating speed ratio of the input gear and the output gear, but also ensures that the rotating direction of the output gear is the same as that of the input gear; the replacement and the maintenance of the later maintenance personnel are convenient.

In some embodiments, referring to fig. 1-7, the reduction gearbox 2 further includes a mounting case 24. The mounting box 24 includes a first case 241 and a second case 242. A mounting cavity 25 is formed between the first case 241 and the second case 242. The input gear 21, the transmission gear 23, the output gear 22 and the position sensor 3 are all arranged in the mounting cavity 25.

Optionally, three grooves are integrally formed on one side surface of the first casing 241, the three grooves are a first groove 251, a second groove 252 and a third groove 253, respectively, the first groove 251 is communicated with the second groove 252, and the second groove 252 is communicated with the third groove 253. The groove bottom of the first groove 251 is integrally formed with a mounting hole 42, and the mounting hole 42 is penetrated by the output shaft 11 of the driving motor 1 to enter the reduction gear box 2. The bottom of the second groove 252 is integrally formed with a rotating shaft 61, and the rotating shaft 61 is used for rotating the transmission gear 23. The groove bottom of the third recess 253 is integrally formed with a mounting hole 42, and the mounting hole 42 enables the spline groove 225 of the output gear 22 to be exposed outside the reduction gear box 2, thereby facilitating later installation.

Optionally, three grooves, namely a fourth groove 254, a fifth groove 255 and a sixth groove 256, are also integrally formed on one side of the second housing 242. The rotating hole 43 is integrally formed at the bottom of the fourth groove 254, the rotating hole 43 is integrally formed at the bottom of the fifth groove 255, the rotating hole 43 is integrally formed at the bottom of the sixth groove 256, and the rotating hole 43 is a blind hole. The bearing 44 is disposed in the rotation hole 43, and the bearing 44 is used to reduce friction when the input gear 21, the transmission gear 23, and the output gear 22 rotate.

On the second housing 242, a bearing 44 is first placed in the rotation hole 43 of the fourth groove 254, and a spacer 45 is placed on the bearing 44. Then, one end of the input gear 21 is placed in the fourth groove 254, and the end surface of the one end of the input gear 21 abuts against the end surface of the bearing 44 in the fourth groove 254. A spacer 45 is then placed on the end face of the other end of the input gear 21. A bearing 44 is first placed in the rotation hole 43 of the sixth groove 256, and a spacer 45 is placed on the bearing 44. Then, the position sensor 3 is fixed in the sixth recess 256, and the transmission shaft 223 of the output gear 22 is engaged in the engaging hole 41 of the position sensor 3. A spacer 45 is disposed on the second side 222 of the output gear 22, and the spacer 45 is sleeved on the protrusion 224. Then, the bearing 44 is sleeved on the bump 224, and the waterproof ring 63 made of rubber is sleeved on the bearing 44. Two gaskets 45 are firstly placed on the rotating hole 43 of the fifth groove 255, one end of the transmission gear 23 is placed in the fifth groove 255, and the transmission gear 23 and the rotating hole 43 of the fifth groove 255 are coaxially arranged. Then, a spacer 45 is placed on the end face of the other end of the transmission gear 23. At this time, one end of the transmission gear 23 meshes with the input gear 21, and the other end meshes with the output gear 22.

Then, the first casing 241 is fastened to the second casing 242, and the first casing 241 and the second casing 242 are fixed by bolts or screws. When the first housing 241 is fixed to the second housing 242, the mounting hole 42 of the first recess 251 is coaxially disposed with the input gear 21, the mounting hole 42 of the third recess 253 is coaxially disposed with the output gear 22, and the rotating shaft 61 in the second recess 252 passes through the through-hole 62 of the transmission gear 23 and enters the rotating hole 43 of the fifth recess 255. The first, second, third, fourth, fifth and

sixth grooves

251, 252, 253, 254, 255 and 256 together form the mounting cavity 25. The output shaft 11 of the drive motor 1 is then inserted into the mounting hole 42 of the first housing 241, through the snap-in hole 41 of the input gear 21, and into the rotation hole 43 of the fourth recess 254. The driving motor 1 is fixed to the first housing 241 with bolts or screws.

In this disclosed embodiment, through carrying out the modularized design to the install bin, divide into two housing module, the maintenance in the later stage of being convenient for. Meanwhile, the installation box plays a role in protecting the input gear, the transmission gear, the output gear and the position sensor in a mode that the input gear, the transmission gear, the output gear and the position sensor are arranged in the installation cavity.

Optionally, a rim 257 is integrally formed on a side of the second housing 242 where the groove is provided, and the rim 257 is disposed around the edges of the fourth groove 254, the fifth groove 255, and the sixth groove 256. A clamping groove 258 is integrally formed in a position, corresponding to the edge 257, on one side surface of the first shell 241 provided with the groove, and the shape of the clamping groove 258 is matched with the shape of the edge 257. Set up the joint groove on first casing, and set up the border on the second casing, through the cooperation in border and joint groove, can make the structure of first casing and second casing inseparabler, improved the structural performance and the waterproof nature of install bin.

Optionally, referring to fig. 1 to 7, the front and rear wheel speed adjusting device of the intelligent vehicle further includes a joint 46. One end of the connector 46 is connected with the position sensor 3, and the other end of the connector 46 is electrically connected with an automobile central control system. A first gap 2431 is integrally formed on the first shell 241; a second gap 2432 is integrally formed on the second shell 242; the joint 46 is clamped between the first gap 2431 and the second gap 2432.

Optionally, one end of the connector 46 is an information collecting end, and the information collecting end is communicated with the position sensor 3 through a connecting wire, and the connecting wire is used for supplying power and transmitting data to the position sensor 3. The other end of the connector 46 is an information output end, and the information output end is connected with a connecting wire of an automobile central control system in an inserting mode. The first gap 2431 is located at the third groove 253, and a rim 257 is integrally formed on a side wall of the first gap 2431. The second gap 2432 is located at the sixth groove 256, and a rim 257 is integrally formed on a side wall of the second gap 2432. The end of the joint 46 near the position sensor 3 is configured with a recess 48. When the joint 46 is disposed between the first gap 2431 and the second gap 2432, the edge 257 at the first gap 2431 and the edge 257 at the second gap 2432 simultaneously snap-fit the recess 48 of the joint 46.

In this disclosed embodiment, detachably is provided with the joint on preceding, the fast adjusting device of rear wheel, is convenient for connect later stage maintenance and change. The connector is connected with the automobile central control system in an inserting mode, so that the connector can conveniently transmit information acquired by the position sensor to the automobile central control system, and the connector can be conveniently detached from the front wheel speed adjusting device and the rear wheel speed adjusting device during later maintenance.

In some embodiments, referring to fig. 2, 8 and 9, the front and rear wheel speed adjusting apparatus of the smart car further includes an initial fixing member 5. The initial fixing member 5 serves to prevent the output gear 22 from rotating. The initial fixing member 5 is made of a rubber material. A spline 52 is integrally formed on one side surface of the initial fixing member 5, and the spline 52 can be inserted into the spline groove 225 and snap-fix the output gear 22. The initial fixing member is also integrally formed with a cylindrical fixing projection 53. The first housing 241 is formed with a fixing hole 49, and the fixing hole 49 facilitates insertion and fixing of the fixing projection 53.

In this disclosed embodiment, set up initial mounting on preceding, the fast adjusting device of rear wheel, can play the fixed action to preceding, the fast adjusting device's of rear wheel output gear, can prevent that preceding, the fast adjusting device's of rear wheel output gear from taking place to rock in the transportation, and preceding, the fast adjusting device of rear wheel of the later stage of being convenient for can install on the car more accurately.

In some embodiments, referring to fig. 3 and 4, the position sensor 3 includes a fixing frame 31, a rotating disc 32, a resistance plate 33, and a protective casing 34. The fixing frame 31 includes a turntable cavity 311, and the fixing frame 31 is coaxially disposed with the transmission shaft 223. The turntable 32 comprises a spring 321, and the turntable 32 is disposed in the turntable cavity 311. The turntable 32 is integrally formed with a locking hole 41 along the axis thereof, and the locking hole 41 is used for locking the transmission shaft 223. The resistive plate 33 is arranged between the turntable 32 and the bottom of the turntable cavity 311. The protective casing 34 is disposed at the opening of the turntable cavity 311 for protecting the turntable 32 and the resistance plate 33.

Alternatively, the body of the fixing frame 31 has a cylindrical shape, and the outer sidewall thereof is provided with a plurality of fixing rods 312. For example, the outer side wall of the main body of the fixing frame 31 is provided with three fixing rods 312, and the fixing frame 31 can be fixed in the sixth groove 256 more stably by a three-point fixing method. One end of the fixing rod 312 is welded to the outer sidewall of the main body of the fixing frame 31, and the other end of the fixing rod 312 is integrally formed with a through hole 62, and the fixing frame is fixed in the sixth groove by a bolt passing through the through hole. The space within the body of the holder 31 can be considered as a turntable cavity 311. The bottom of the turntable cavity 311 is also integrally formed with a through hole 62. The bottom of the turntable cavity 311 is integrally formed with a rim 257, and the rim 257 surrounds the edge of the through hole 62. The resistive plate 33 is configured with a through hole 62 at a central position. The resistance plate 33 is firstly placed at the cavity bottom of the turntable cavity 311, the edge 257 of the cavity bottom of the turntable cavity 311 penetrates through the through hole 62 of the resistance plate 33, and the outer wall of the edge 257 of the cavity bottom of the turntable cavity 311 is matched with the side wall of the turntable cavity 311 to clamp and fix the resistance plate 33. The rotation shaft 61 is configured at the center of the rotation plate 32, the rotation shaft 61 of the rotation plate 32 is configured with a clamping hole 41 along the axial direction, and a clamping block 411 is configured in the clamping hole 41. A spring plate 321 is adhered to or embedded in or configured on a side of the rotary disc 32 facing the resistance plate 33, and the spring plate 321 is made of a metal material, for example, the spring plate 321 is made of a copper material. When the turntable 32 is placed in the turntable cavity 311, one end of the rotating shaft 61 of the turntable 32 abuts against the cavity bottom of the turntable cavity 311, and also abuts against the inner wall of the edge 257 of the cavity bottom of the turntable cavity 311. At this time, the elastic sheet 321 on the turntable 32 abuts against the resistance plate 33. The shield case 34 has a disk shape, and a through hole 62 is formed at a central position of the shield case 34. The protective casing 34 covers the opening of the turntable cavity 311. For example, the protective casing 34 is placed directly at the mouth of the turntable cavity 311.

When the position sensor 3 is installed, one side surface of the protective cover 34 away from the rotary disc 32 will first abut against the gasket 45 in the sixth groove 256, the rotary disc 32 and the resistance plate 33 are sequentially installed, and finally the fixing frame 31 is fixed in the sixth groove 256, so that the fixing frame 31 has a limiting and fixing function on the resistance plate 33, the rotary disc 32 and the protective cover 34. The protective casing 34 protects the rotary disk 32 and the resistance plate 33, and prevents the rotary disk 32, the resistance plate 33 and the groove bottom of the sixth groove 256 from being damaged due to friction when the rotary disk 32 rotates along with the output gear 22. After the fixing frame 31 is fixed in the sixth groove 256, the transmission shaft 223 of the output gear 22 passes through the through hole 62 of the fixing frame 31, the through hole 62 of the resistance plate 33 and enters the clamping hole 41 of the rotating disc 32, and finally the transmission shaft 223 passes through the gasket 45 and enters the bearing 44 of the sixth groove 256.

In this disclosed embodiment, through carrying out the modularization setting to position sensor to divide into four modules of mount, carousel, resistance board, protective housing with position sensor, when later stage position sensor broke down, only need change the part that breaks down can, reduced the cost of maintenance in later stage, avoided unnecessary wasting of resources.

Alternatively, referring to fig. 3, fig. 4 and fig. 10, the resistive plate 33 includes a main board 330, a first resistive segment 331 and a second resistive segment 332. The main plate 330 is disposed at the bottom of the turntable cavity 311. The first resistor 331 is disposed on a side of the main board 330 facing the turntable 32. The second resistor segment 332 is disposed on a side of the main board 330 facing the turntable 32. The main plate 330 is configured with a through hole 62 at a central position. The main board 330 is firstly placed at the bottom of the turntable cavity 311, the edge 257 of the bottom of the turntable cavity 311 penetrates through the through hole 62 of the main board 330, and the outer wall of the edge 257 of the bottom of the turntable cavity 311 is matched with the side wall of the turntable cavity 311 to clamp and fix the main board 330. The first resistor 331 and the second resistor 332 are fixed on a side of the main board 330 facing the turntable 32 by bonding or embedding.

The first and second resistor segments 331 and 332 are arc-shaped, and the diameter of the first resistor segment 331 is greater than that of the second resistor segment 332, so that the first resistor segment 331 is sleeved on the second resistor segment 332. One end of the first resistance segment 331 is connected to one end of the second resistance segment 332. When the turntable 32 is installed in the turntable cavity 311 after the position sensor 3 has installed the resistive plate 33, the spring 321 of the turntable 32 abuts against the first resistive segment 331 and the second resistive segment 332 simultaneously.

In the embodiment of the disclosure, the principle of the sliding rheostat is further optimized and is converted into the technical field of the driving motor of the automobile for use, when the turntable rotates along with the output gear, the resistance value can change along with the rotation of the elastic piece, and the automobile central control system controls the rotation of the driving motor according to the rotation angle and the resistance value of the elastic piece, so that the purpose that the front and rear wheel speeds of the automobile are the same is achieved.

Alternatively, referring to FIG. 10, the first resistor segment 331 includes a first carbon film resistor 333, a second carbon film resistor 334, a third carbon film resistor 335, and a fourth carbon film resistor 336. The first carbon film resistor 333, the second carbon film resistor 334, the third carbon film resistor 335, and the fourth carbon film resistor 336 are connected in series end to end in sequence, and the series connection forms an arc shape and exists in a gap. The first carbon film resistor 333 is connected in series with the resistor input 337; the fourth carbon film resistor 336 is connected to the resistor output terminal 338, while the fourth carbon film resistor 336 is connected to one end of the second resistor segment 332; the other end of the second resistor segment 332 is connected to a common terminal 339, and the common terminal 339 is disposed in the slot and not connected to other structures.

In one example, the resistance values of the resistor input end 337 and the resistor output end 338 are 132 Ω, and the resistor input end 337 and the resistor output end 338 are provided to prevent the spring plate 321 from rotating to the gap position, and the voltage input by the resistor input end 337 is too large to burn the resistor plate 33. The resistances of the first carbon film resistor 333, the fourth carbon film resistor 336 and the second resistor segment 332 are 0 Ω, and the first carbon film resistor 333, the fourth carbon film resistor 336 and the second resistor segment 332 can be regarded as conducting wires, so that the change of the resistance value has buffer time, and the resistance value is prevented from increasing instantly. The second carbon film resistor 334 has a resistance of 100 Ω, and the third carbon film resistor 335 has a resistance of 1000 Ω.

In some embodiments, referring to fig. 2, the front and rear wheel speed adjusting device of the intelligent vehicle further includes a motor housing 12. The motor housing 12 covers the driving motor 1, and the motor housing 12 is used for water and dust prevention.

The invention discloses a working principle of a front wheel speed adjusting device and a rear wheel speed adjusting device of an intelligent automobile, which comprises the following steps:

the initial fixing parts of the front and rear wheel speed adjusting devices are taken down firstly, then one end of a connecting shaft of the automobile differential mechanism, which is provided with a spline, is inserted into the spline grooves of the front and rear wheel speed adjusting devices, the front and rear wheel speed adjusting devices are installed on an automobile, and the position sensor can detect the rotation angle of the output gear in real time and feed the rotation angle back to the automobile central control system. During the running process of the automobile, the power of the automobile is distributed to the front wheel and the rear wheel through the gearbox. When the power distributed by the front wheel and the rear wheel is unreasonable, the speeds of the front wheel and the rear wheel of the automobile are different. The speed of the front wheel and the rear wheel is transmitted to the output gear through the differential mechanism, the rotary disc of the position sensor rotates along with the output gear, the elastic sheet on the rotary disc slides on the resistance plate, and the resistance value of the resistance plate changes along with the change. When the spring plate moves to the second carbon film resistor and the third carbon film resistor, the rotation angle of the spring plate is increased, and the resistance value is increased. At the moment, the central control system of the automobile controls the engine to be disconnected from the differential mechanism of the automobile, and simultaneously controls the driving motor to work instead of the engine. The driving motor drives the output gear in the reduction gear box to rotate so as to adjust the percentage of power distributed on the front wheel and the rear wheel, thereby achieving the purpose of adjusting the speed of the front wheel and the rear wheel. When the speeds of the front wheel and the rear wheel of the automobile are the same, the automobile central control system controls the driving motor to stop working according to the rotating angle information of the output gear fed back by the position sensor, and simultaneously controls the engine to drive the automobile differential mechanism to work again.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a preceding, rear wheel speed adjusting device of intelligent automobile, includes driving motor (1), reduction gear box (2) include interconnect's input gear (21) and output gear (22), its characterized in that still includes:

a position sensor (3) provided on a transmission shaft (223) of the output gear (22); an output shaft (11) of the driving motor (1) is connected with an input gear (21); the output gear (22) is provided with a spline groove (225) connected with a connecting shaft (47) of an automobile differential;

the position sensor (3) is used for detecting the running state of the output gear (22), feeding collected front and rear wheel speed information back to the central control system of the automobile, and judging whether the engine which is normally driven is switched to the front and rear wheel speed adjusting device or not by the central control system of the automobile.

2. The front and rear wheel speed adjusting apparatus of an intelligent vehicle according to claim 1,

the driving motor (1) comprises a planetary gear motor;

the output shaft of the planetary gear motor and the input gear (21) are coaxially arranged.

3. The front and rear wheel speed adjusting apparatus of an intelligent vehicle according to claim 1 or 2, wherein the reduction gear box (2) further comprises:

a transmission gear (23) provided between the input gear (21) and the output gear (22); one end of the transmission gear (23) is meshed with the input gear (21), and the other end of the transmission gear is meshed with the output gear (22); the rotating speed ratio range of the input gear (21) to the output gear (22) is 4-5: 1.

4. The front and rear wheel speed adjusting apparatus of intelligent vehicle as claimed in claim 3, wherein the reduction gear box (2) further comprises:

the mounting box (24) comprises a first shell (241) and a second shell (242), and a mounting cavity (25) is formed between the first shell (241) and the second shell (242); the input gear (21), the transmission gear (23), the output gear (22) and the position sensor (3) are all arranged in the installation cavity (25).

5. The device of claim 4, further comprising:

one end of the joint (46) is connected with the position sensor (3), and the other end of the joint is electrically connected with the central control system of the automobile;

a first gap (2431) is integrally formed on the first shell (241); a second gap (2432) is integrally formed on the second shell (242); the joint (46) is clamped between the first gap (2431) and the second gap (2432).

6. The device of claim 4, further comprising:

an initial fixing member (5) for preventing the output gear (22) from rotating; the spline groove (225) is used for clamping one end of the initial fixing piece (5) or a connecting shaft (47) of the automobile differential; or, the first shell (241) is integrally formed with a mounting hole (42), and one end of the initial fixing piece (5) or the connecting shaft (47) of the automobile differential penetrates through the mounting hole (42) and is clamped in the spline groove (225).

7. The front and rear wheel speed adjusting apparatus of intelligent vehicle as claimed in claim 1, wherein the position sensor (3) comprises:

the fixing frame (31) comprises a turntable cavity (311), and the fixing frame (31) and the transmission shaft (223) are coaxially arranged;

the rotary disc (32) comprises an elastic sheet (321), and the rotary disc (32) is arranged in the rotary disc cavity (311); the turntable (32) is integrally formed with a clamping hole (41) along the axis of the turntable, and the clamping hole (41) is used for clamping the transmission shaft (223);

the resistance plate (33) is arranged between the turntable (32) and the cavity bottom of the turntable cavity (311);

and the protective cover shell (34) is arranged at the cavity opening of the turntable cavity (311) and used for protecting the turntable (32) and the resistance plate (33).

8. The front and rear wheel speed adjusting apparatus of an intelligent vehicle according to claim 7, wherein the resistance plate (33) comprises;

the main board (330) is arranged at the bottom of the turntable cavity (311);

a first resistor section (331) arranged on one side of the main board (330) facing the turntable (32);

a second resistor segment (332) arranged on one side of the main board (330) facing the turntable (32);

the first resistance segment (331) is sleeved on the second resistance segment (332), and the first resistance segment (331) and the second resistance segment (332) are both arc-shaped; one end of the first resistive segment (331) is connected to one end of the second resistive segment (332).

9. The front and rear wheel speed adjusting apparatus of an intelligent vehicle according to claim 8,

the first resistive segment (331) includes: a first carbon film resistor (333), a second carbon film resistor (334), a third carbon film resistor (335), a fourth carbon film resistor (336); the first carbon film resistor (333), the second carbon film resistor (334), the third carbon film resistor (335) and the fourth carbon film resistor (336) are sequentially connected end to end; the first carbon film resistor (333) is connected with the resistor input end (337); the fourth carbon film resistor (336) is connected with the resistor output end (338), and meanwhile, the fourth carbon film resistor (336) is connected with one end of the second resistor section (332); the other end of the second resistor segment (332) is connected with a common terminal (339).

10. The front and rear wheel speed adjusting apparatus of an intelligent vehicle according to claim 1 or 2, further comprising:

a motor housing (12) which covers the drive motor (1); the motor housing (12) is used for preventing water and dust.