Automobile limited slip sensing differential lock device

Abstract

The invention discloses a locking device for a limited slip induction differential lock of an automobile, comprising a permanent magnet assembly, an induction coil assembly, a sun gear and a planetary gear, wherein the sun gear is two and arranged in parallel with each other, the planetary gear is two and arranged in parallel with each other, the sun gear and the planetary gear mesh with each other to form a ring, the permanent magnet assembly is arranged in two pieces and respectively located on both sides of the planetary gear, the induction coil assembly is sleeved and surrounded outside the permanent magnet assembly, and the induction coil assembly is arranged in two pieces and respectively located on both sides of the planetary gear. When the permanent magnet assembly and the induction coil assembly rotate relative to each other, a reverse locking force will be generated between the permanent magnet assembly and the surrounding induction coil assembly, and the faster the relative rotation speed, the stronger the locking force. The space of the device is fully utilized to achieve maximum and rapid acquisition of the locking force, and the locking force is strong and the reaction speed is fast. The locking force can be adjusted by a variable resistor to achieve a better use effect.

Description

Technical Field

[0001] The invention relates to an automobile driving control device, in particular to an automobile limited slip induction differential lock device. Background Art

[0002] The differential is installed between the left and right driving wheels of the car. When the car is turning or driving on an uneven road, the differential can ensure that the left and right driving wheels have different speeds when the travel is unequal. However, the existence of the differential makes it impossible to effectively transmit power when the driving wheel on one side of the car slips, so a limited slip differential appears. The limited slip differential locks the differential when the wheel on one side of the car slips, so that the driving wheels on both sides can get power, thereby better solving the problem of uneven power transmission when the wheel on one side of the car slips. The existing limited slip sensing differential lock devices for automobiles are of various forms, most of which are mechanical, with high manufacturing and processing precision requirements, high cost, high speed requirements when starting, and can only complete differential locking at low speed or stop. Therefore, the inventor of this patent designed a device "a kind of automobile sensing differential locking device" that realizes differential locking based on the principle of electromagnetic induction, and obtained the utility model patent right, with the patent number "ZL201920136211.6". The manufacturing process of the device is simple, with low requirements and low manufacturing cost. It has no speed requirements and can play a certain differential locking role in almost the entire speed range. However, the device can only generate electromagnetic induction at the four corner points corresponding to the electromagnetic induction and the permanent magnet, and the induction strength is small, and the locking strength and reaction speed are somewhat lacking. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a vehicle limited slip sensing differential lock device with strong locking force and fast response speed.

[0004] According to one aspect of the present invention, a locking device for a limited-slip induction differential lock of an automobile is provided, comprising a permanent magnet assembly, an induction coil assembly, a sun gear and a planetary gear, wherein the sun gear is provided in two pieces and are arranged relatively parallel to each other, the planetary gear is provided in two pieces and are arranged relatively parallel to each other, the sun gear and the planetary gear are meshed with each other to form a ring, the permanent magnet assembly is provided in two pieces and are respectively located on both sides of the planetary gear, the induction coil assembly is sleeved on and surrounds the permanent magnet assembly, and the induction coil assembly is provided in two pieces and are respectively located on both sides of the planetary gear.

[0005] In some embodiments, the permanent magnet assembly includes a permanent magnet frame and a permanent magnet. The permanent magnet frame is disc-shaped, and a plurality of grooves are provided on the edge of the permanent magnet frame. The permanent magnets are embedded in the grooves. The permanent magnets are arranged in a one-to-one correspondence with the grooves, and the N and S poles of the plurality of permanent magnets are arranged alternately.

[0006] In some embodiments, the number of the permanent magnets is an even number of 4-20.

[0007] In some embodiments, the induction coil assembly includes a fixed ring, an iron core and a winding coil, one end of the iron core is fixedly connected to the fixed ring, the other end of the iron core extends toward the center of the fixed ring, the winding coil surrounds the outside of the iron core, and the iron core and the winding coil are arranged in a one-to-one correspondence into multiple groups and distributed in a ring shape on the inner side of the fixed ring.

[0008] In some embodiments, a plurality of groups of the winding coils are connected in series, and the winding directions of adjacent winding coils are opposite.

[0009] In some embodiments, the number of the winding coils is an even number of 4 to 20, each group of the winding coils is set to 10 to 40 turns, and the winding coils use copper enameled wires with a diameter of 0.1 to 2 mm.

[0010] In some embodiments, the induction coil assembly further includes a variable resistor, a circuit switch and a resistance control device, wherein the variable resistor circuit switch is connected in series with the winding coil, and the resistance control device is connected in parallel with the variable resistor.

[0011] In some embodiments, the resistance value of the variable resistor is 1-20Ω.

[0012] In some embodiments, the vehicle limited slip induction differential lock locking device also includes a planetary gear carrier, a first output shaft and a driven bevel gear, the first output shaft passes through the driven bevel gear and is rotatably connected to the driven bevel gear, one end of the first output shaft is fixedly connected to one of the sun gears, one end of the planetary gear carrier is fixedly connected to one side of the driven bevel gear, and the induction coil assembly is fixed to one side of the planetary gear carrier.

[0013] In some embodiments, the automobile limited slip sensing differential lock device also includes a connecting shaft, which passes through the planetary gear carrier and is rotatably connected to the planetary gear carrier, the center of the planetary gear is fixedly connected to one end of the connecting shaft, and the other end of the connecting shaft is fixedly connected to the permanent magnet assembly.

[0014] The beneficial effects of the present invention are as follows: by arranging permanent magnet assemblies on both sides of the planetary gear and surrounding the induction coil assembly outside the permanent magnet assembly. When the permanent magnet assembly and the induction coil assembly rotate relative to each other, a reverse locking force will be generated between the permanent magnet assembly and the surrounding induction coil assembly. The faster the relative rotation speed, the stronger the locking force. The surrounding induction coil assembly and the permanent magnet assembly are arranged in a surrounding manner, so that the winding coils in any group of induction coil assemblies can be induced at the same time. The device space is fully utilized to achieve the maximum and fastest locking force, with strong locking force and fast response speed. The locking force can be adjusted by a variable resistor to achieve a better use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a limited slip sensing differential lock device for an automobile according to an embodiment of the present invention;

[0016] Figure 2 for Figure 1 A partial front view structural diagram of a limited slip sensing differential lock device for an automobile shown;

[0017] Figure 3 It is a structural schematic diagram of a permanent magnet frame of a limited slip induction differential lock device of an automobile;

[0018] Figure 4 It is a schematic diagram of the structure of the permanent magnet of the limited slip induction differential lock device of the automobile;

[0019] Figure 5 It is a structural schematic diagram of an induction coil assembly of a limited slip induction differential lock device of an automobile;

[0020] Figure 6 The circuit diagram of the induction coil assembly of the automobile limited slip induction differential lock device. DETAILED DESCRIPTION

[0021] The invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] Figure 1 to Figure 6 A limited slip sensing differential lock device for a vehicle according to an embodiment of the present invention is schematically shown.

[0023] Reference Figure 1 and Figure 2The vehicle limited slip induction differential lock device comprises a permanent magnet assembly 1, an induction coil assembly 2, a sun gear 3, a planetary gear 4, a planetary gear carrier 5, a first output shaft 6, a driven bevel gear 7, a connecting shaft 8, a second output shaft 9 and a driving bevel gear 10. There are two sun gears 3 arranged relatively parallel to each other, and there are two planetary gears 4 arranged relatively parallel to each other. The sun gears 3 and the planetary gears 4 mesh with each other in sequence to form a ring. One end of the first output shaft 6 is fixedly connected to the center of one of the sun gears 3, and the other end of the first output shaft 6 is connected to a wheel of the vehicle. One end of the second output shaft 9 is connected to another sun gear 3, and the other end of the second output shaft 9 is connected to another wheel of the vehicle. When the two vehicle wheels rotate synchronously, the two sun gears 3 rotate in parallel, driving the two planetary gears 4 to revolve around the axis of the sun gear 3 without generating self-rotation. When the speeds of the two vehicle wheels are inconsistent, the planetary gears 4 will generate self-rotation while revolving around the axis of the sun gear 3.

[0024] The center of the driving bevel gear 10 is connected to the driving device of the car through the input shaft 101. The driving bevel gear 10 meshes with the driven bevel gear 7 and can drive the driven bevel gear 7 to rotate. The first output shaft 6 passes through the center of the driven bevel gear 7 and is rotatably connected to the driven bevel gear 7. The rotation of the driven bevel gear 7 can drive the two planetary gears 4 to revolve. The two planetary gears 4 revolve and drive the two sun gears 3 to rotate and drive the wheels of the car to rotate. One end of the planetary gear carrier 5 is fixedly connected to one side of the driven bevel gear 7. The planetary gear carrier 5 and the driven bevel gear 7 can be fixedly connected by screws to facilitate disassembly or replacement. The planetary gear carrier 5 is set in two pieces and corresponds to the two planetary gears 4 respectively. There are also two connecting blocks 51 between the two planetary gear carriers 5. The first output shaft 6 and the second output shaft 9 are separately movable and pass through the two connecting blocks 51.

[0025] Referring to 3, the permanent magnet assembly 1 is provided in two pieces and is respectively located on both sides of the planetary gear 4, the induction coil assembly 2 is set and surrounds the permanent magnet assembly 1, and the induction coil assembly 2 is provided in two pieces and is respectively located on both sides of the planetary gear 4. The induction coil assembly 2 is fixed to one side of the planetary gear frame 5. The permanent magnet assembly 1 includes a permanent magnet frame 11 and a permanent magnet 12, the permanent magnet frame 11 is in the shape of a disc, and the permanent magnet frame 11 can be formed by stacking solid silicon steel sheets. The edge of the permanent magnet frame 11 is provided with a plurality of grooves 111, and the permanent magnet 12 is embedded in the groove 111, and the magnetic pole direction of the permanent magnet 12 is directly opposite to the center of the permanent magnet frame 11. The permanent magnet 12 is provided in a one-to-one correspondence with the groove 111, and the N and S poles of the plurality of permanent magnets 12 are staggered. The number of the permanent magnet 12 and the groove 111 can be set to an even number of 4 to 20.

[0026] Reference Figures 4 to 6The induction coil assembly 2 includes a fixed ring 21, an iron core 22, a winding coil 23, a variable resistor 24, a circuit switch 25, a resistance control device 26 and a support frame 27. The fixed ring 21 is in a hollow annular shape, and a first connecting block 211 is fixedly provided at one end of the fixed ring 21, and the first connecting block 211 is fixedly connected to the driven bevel gear 7. A second connecting block 212 is fixedly provided at the other end of the fixed ring 21, and a bayonet 213 is fixedly provided on one side of the second connecting block 212. A pin hole is provided on the planetary gear carrier 5, and the bayonet 213 is inserted into the pin hole and fixed with the pin hole by bolts or interference fit and bolts. The iron core 22 is fixed to the fixed ring 21 as a whole, and the other end of the iron core 22 extends to the center of the fixed ring 21. The iron core 22 is formed by stamping and stacking small thin silicon steel sheets. The winding coil 23 surrounds the outside of the iron core 22, and the iron core 22 and the winding coil 23 are arranged in a one-to-one correspondence as multiple groups and are distributed in a ring shape on the inner side of the fixed ring 21. A plurality of iron cores 22 and winding coils 23 surround the permanent magnet assembly 1 and have a certain gap with the permanent magnet assembly 1 .

[0027] Multiple groups of winding coils 23 are connected in series, and the winding directions of adjacent winding coils 23 are opposite. The number of winding coils 23 can be set to an even number of 4 to 20, and the winding coils 23 can be set one by one with the permanent magnets 12. Each group of winding coils 23 is set to 10 to 40 turns. The variable resistor 24, the circuit switch 25 and the winding coil 23 are connected in series to form a series loop, and the coils of the two induction coil assemblies 2 are arranged in parallel. The resistance of the variable resistor 24 is 1 to 20Ω. The winding coil 23 of an induction coil assembly 2 uses a copper enameled wire with a diameter of 0.1 to 2 mm, which is wound through each iron core 22 in turn and then connected in series with the variable resistor 24.

[0028] The resistance control device 26 is connected in parallel with the variable resistor 24 and can control the resistance value of the variable resistor 24. The resistance control device 26 is configured to be similar to a solenoid valve structure, and the resistance control device 26 includes a sleeve 261, an armature 262, a sleeve coil 263, a reset spring and a magnetic pole core. The sleeve coil 263 is connected to the series circuit, and the sleeve coil 263 is sleeved outside the sleeve 261. One end of the sleeve 261 is closed, the reset spring and the magnetic pole core are located in the sleeve 261, and one end of the reset spring and the magnetic pole core is fixed to the closed end of the sleeve 261. One end of the armature 262 is inserted into the other end of the sleeve 261. One end of the armature 262 abuts against the other end of the reset spring and is opposite to the magnetic pole core, and the other end of the armature 262 is fixedly connected to the potential contact of the variable resistor 24. The armature 262 and the magnetic pole core are made of ferromagnetic materials, and the sleeve 261 and the reset spring are made of non-ferromagnetic materials. When current flows through the sleeve coil 263, the pole core is magnetized and generates an attractive force to attract the armature 262 to overcome the resistance of the reset spring and move toward the pole core, driving the potential contact of the variable resistor 24 to move. The larger the current, the stronger the attractive force and the greater the displacement of the potential contact. When no current flows through the sleeve coil 263, the resilience of the reset spring resets the armature 262.

[0029] The support frame 27 is fixed to the outside of the fixing ring 21. A bearing is provided at the center of the support frame 27. The end of the connecting shaft 8 is connected to the bearing, which can stabilize the gap between the permanent magnet assembly 1 and the induction coil assembly 2 and ensure the stable operation of the permanent magnet assembly 1.

[0030] The connecting shaft 8 penetrates the planetary gear carrier 5 and is rotatably connected to the planetary gear carrier 5 through a bearing. The center of the planetary gear 4 is fixedly connected to one end of the connecting shaft 8, and the other end of the connecting shaft 8 is fixedly connected to the center of the permanent magnet assembly 1. The rotation of the planetary gear 4 drives the connecting shaft 8 to rotate, thereby driving the permanent magnet assembly 1 to rotate. The rotation of the permanent magnet assembly 1 causes the magnetic flux in the induction coil assembly 2 to change, thereby generating an induced current in the winding coil 23, and the current flows through the variable resistor 24 to consume electrical energy.

[0031] When the vehicle is on a good road condition, it does not need the limited slip inductive differential lock to drive, and the normally closed circuit switch 25 has no effect on the normal driving of the vehicle.

[0032] When the car is running on a normal road, the variable resistor 24 can be adjusted to the maximum 20Ω position, the active bevel gear 10 drives the driven bevel gear 7 to rotate, the driven bevel gear 7 rotates to drive the planetary gear carrier 5 to rotate and drive the planetary gear 4 to rotate. When the car is not running at a differential speed, the planetary gear 4 only revolves but does not rotate, the permanent magnet assembly 1 revolves with the planetary gear 4, the total magnetic flux in the induction coil assembly 2 remains unchanged, and no induced current is generated. At this time, the device has no effect on the normal driving of the car.

[0033] When the car is turning and driving differentially, the planetary gear 4 both revolves and rotates, and the rotation speed is very small. The total magnetic flux of the induction coil assembly 2 changes, and the induced current is also very small. This current will cause a slight obstruction and lock to the differential driving of the car. When the car is running and there is a slight slip, the planetary gear 4 both revolves and rotates, and the rotation speed is greater than that of the normal differential, the induced current becomes larger, and the planetary gear tends to rotate and lock, reaching a slight induction locking state, which improves the car's passability.

[0034] When the car is driving on a slippery road, the variable resistor 24 is adjusted to the middle 10Ω position. When the tire slips, the planetary gear 4 revolves and rotates around the sun gear 3, and the permanent magnet assembly 1 will follow the planetary gear 4 in revolution and rotation. At this time, the rotation speed increases, the total magnetic flux of the induction coil assembly 2 changes faster, and a large induced current is generated. The locking tendency of the planetary gear rotation increases, and the first output shaft 6 and the second output shaft 9 rotate with a locking tendency, which improves the vehicle's passability.

[0035] When the car is driving in a bad environment, the variable resistor 24 is adjusted to the 1Ω position. When the car passes through a bumpy road and one of the driving tires does not rotate and the other tire idles, the planetary gear 4 rotates at a very high speed, and the planetary gear 4 drives the permanent magnet assembly 1 to rotate at a very high speed. The total magnetic flux change of the induction coil assembly 2 is rapidly accelerated, and the induced current is rapidly increased. At this time, the tendency of the planetary gear to stop rotating is also greater, achieving a self-rotation locking effect, and the first output shaft 6 and the second output shaft 9 are almost locked and rotate at nearly the same speed. The left and right wheels of the car nearly share the torque, thereby improving the car's passability.

[0036] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the invention.

Claims

1. Automobile limited slip induction differential lock device, characterized by: The invention comprises a permanent magnet assembly (1), an induction coil assembly (2), a sun gear (3) and a planetary gear (4); the sun gear (3) is two and arranged opposite to each other; the planetary gear (4) is two and arranged opposite to each other; the sun gear (3) and the planetary gear (4) mesh with each other to form a ring; the permanent magnet assembly (1) is provided in two pieces and are respectively located on both sides of the planetary gear (4); the induction coil assembly (2) is sleeved on and surrounds the permanent magnet assembly (1); the induction coil assembly (2) is provided in two pieces and are respectively located on both sides of the planetary gear (4); the permanent magnet assembly (1) comprises a permanent magnet frame (11) and a permanent magnet (12); the permanent magnet frame (11) is in the shape of a disk; the edge of the permanent magnet frame (11) is provided with a plurality of grooves (111); the permanent magnet (12) is embedded in the grooves (111); the permanent magnet (12) and the grooves (111) are provided in a plurality of pieces; the plurality of permanent magnets (12) have N and S poles arranged alternately; The induction coil assembly (2) comprises a fixed ring (21), an iron core (22) and a winding coil (23); one end of the iron core (22) is fixedly connected to the fixed ring (21); the other end of the iron core (22) extends toward the center of the fixed ring (21); the winding coil (23) surrounds the outside of the iron core (22); the iron core (22) and the winding coil (23) are arranged in a one-to-one correspondence in a plurality of groups and are distributed in a ring shape on the inner side of the fixed ring (21).

2. The vehicle limited slip sensing differential lock device according to claim 1, characterized in that: The number of the permanent magnets (12) is an even number between 4 and 20.

3. The vehicle limited slip sensing differential lock device according to claim 1, characterized in that: A plurality of groups of winding coils (23) are connected in series, and the winding directions of adjacent winding coils (23) are opposite.

4. The vehicle limited slip sensing differential lock device according to claim 3, characterized in that: The number of the winding coils (23) is an even number of 4 to 20, each group of the winding coils (23) is set to have 10 to 40 turns, and the winding coils (23) are made of copper enameled wire with a diameter of 0.1 to 2 mm.

5. The vehicle limited slip sensing differential lock device according to claim 1, characterized in that: The induction coil assembly (2) further comprises a variable resistor (24), a circuit switch (25) and a resistance control device (26); the variable resistor (24) and the circuit switch (25) are connected in series with the winding coil (23); and the resistance control device (26) is connected in parallel with the variable resistor (24).

6. The vehicle limited slip sensing differential lock device according to claim 5, characterized in that: The resistance value of the variable resistor (24) is 1 to 20Ω.

7. The vehicle limited slip sensing differential lock device according to claim 1, characterized in that: It also comprises a planetary gear carrier (5), a first output shaft (6) and a driven bevel gear (7), wherein the first output shaft (6) passes through the driven bevel gear (7) and is rotatably connected to the driven bevel gear (7), one end of the first output shaft (6) is fixedly connected to one of the sun gears (3), one end of the planetary gear carrier (5) is fixedly connected to one side of the driven bevel gear (7), and the induction coil assembly (2) is fixed to one side of the planetary gear carrier (5).

8. The vehicle limited slip sensing differential lock device according to claim 7, characterized in that: It also includes a connecting shaft (8), the connecting shaft (8) passing through the planetary gear frame (5) and being rotatably connected to the planetary gear frame (5), the center of the planetary gear (4) being fixedly connected to one end of the connecting shaft (8), and the other end of the connecting shaft (8) being fixedly connected to the permanent magnet assembly (1).

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