WO2018148857A1

WO2018148857A1 - Adaptive locking differential

Info

Publication number: WO2018148857A1
Application number: PCT/CN2017/000158
Authority: WO
Inventors: 范淼冰
Original assignee: 范淼冰
Priority date: 2017-02-15
Filing date: 2017-02-15
Publication date: 2018-08-23

Abstract

Disclosed is an adaptive locking differential, mainly consisting of a housing (1), an end cover (2), a gear mounting end cover (3), a left half axle gear (4), a right half axle gear (14), a left-facing worm gear (5), a right-facing worm gear (15), and a worm wheel (6). Using the self-locking feature of a worm wheel and a worm, the adaptive locking differential can enable a vehicle to automatically adapt to driving off-road and on a paved road surface, without the need for a driver to manually switch between the opening and the locking of a differential lock, can enable the remaining wheels of the vehicle to still obtain sufficient power when an individual wheel slips and completely loses adhesion in off-road conditions, enables the vehicle to automatically release a differential force when a rotational speed difference is generated between the wheels during turning, and carries out automatic locking when the wheels slip or are hung in the air and completely lose adhesion, so as to get out of trouble smoothly.

Description

An adaptive lock differential

Technical neighborhood

The invention relates to the field of automotive differentials, in particular to the neighborhood of mechanical automatic locking limited slip differentials.

Background technique

Off-road vehicles use four-wheel drive. The differentials currently used include ordinary open differentials plus differential locks, electronic limited slip differentials, overrunning clutches, self-locking differentials, Tosson differentials, and new types. Tosson differential. The common open differential plus differential lock requires the driver to manually switch the lock and open, which increases the driver's professional requirements and driving fatigue. The electronic limited slip differential has the disadvantages of poor reliability response lag and long-term off-road causing the brake system to overheat and the braking effect is reduced. Beyond the clutch differential has the disadvantage of switching shock and reaction lag. The Tosson differential has the disadvantage of being bulky, heavy, and not completely lockable. The new Tosson differential has the disadvantage of not being able to lock when individual wheels are suspended or completely lose their adhesion.

Summary of the invention

The object of the present invention is to solve the shortcomings of the existing differential, so that the driver can automatically adapt to the off-road condition and the pavement driving without manually switching the opening and locking of the differential lock during driving. In the case of the off-road condition, when the individual wheels are slipping and the adhesion is completely lost, the remaining wheels can still obtain sufficient power, can smoothly get out of trouble, and have no problem of switching shock and locking lag. Adaptive lock differential, mainly used in automotive transmissions, especially for four-wheel drive off-road vehicles.

The technical solution adopted by the present invention is: an adaptive lock differential, which mainly has a housing (1), an end cover (2), a gear mounting end cover (3), a left half shaft gear (4), and a right half. The shaft gear (14), the left worm gear (5), the right worm gear (15), and the turbine (6) are composed. The gear portion of the left worm gear (5) meshes with the left side gear (4), the gear portion of the right worm gear (15) meshes with the right side gear (14), and the left worm gear (5), rightward Both ends of the worm gear (15) are respectively coupled with the end cover (2) and the gear mounting end cover (3), and the worm portions of the left worm gear (5) and the right worm gear (15) mesh with the turbine (6) The turbine (6) is coupled with the housing (1), and the housing (1), the end cover (2), and the gear mounting end cover (3) are assembled and integrated.

DRAWINGS

Figure 1 is a schematic view of the overall appearance of the assembled assembly of the present invention

2 is a schematic view showing the internal structure of the hidden casing (1) of the present invention.

Figure 3 is a schematic view of the internal structure of the present invention

Figure 4 is the housing

Figure 5 is the end cap

Figure 6 is the gear mounting end cap

Figure 7 is a half shaft gear

Figure 8 is the worm gear

Figure 9 is the turbine

detailed description

The invention provides an adaptive lock differential, which can automatically adapt to the off-road condition and the pavement driving without manual switching of the opening and locking of the differential lock, and has no problem of switching impact and locking lag.

In order to make the objects, the technical solutions and the advantages of the present invention more clear, the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in Figures 1-3, the adaptive lock differential includes a housing (1), an end cover (2), a gear mounting end cover (3), a left side gear (4), and a right side gear ( 14), the left worm gear (5), the right worm gear (15), the turbine (6), the gear portion of the left worm gear (5) and the left side gear (4) mesh, the right worm gear ( The gear portion of 15) meshes with the right side gear (14), and the worm portion of the left worm gear (5) and the right worm gear (15) mesh with the turbine (6).

Both ends of the left worm gear (5) and the right worm gear (15) are respectively coupled with the end cover (2) and the gear mounting end cover (3).

The turbine (6) is coupled with the housing (1),

The housing (1), the end cover (2), and the gear mounting end cover (3) are assembled and integrated.

The left worm gear (5) and the right worm gear (15) may be left and right side mounts of the same worm gear.

The left side gear (4) right side gear (14) can be the same side gear mounted in the left position and in the right position.

The worm portion of the left worm gear (5) and the right worm gear (15) meshes with the turbine (6), and the center distance of the turbine (6) and the left worm gear (5) is the left side gear (4) The center distance between the turbine (6) and the right-hand worm gear (15) should be the right half-shaft gear (14) and the right-hand worm gear (15), which is one-half of the center distance of the left-hand worm gear (5). ) One-half of the center distance of the fit.

The gear portion of the left worm gear (5) meshes with the left side gear (4). When the fitting is fitted, the marked point of the left worm gear (5) should be aligned with the tooth root of the side gear (4), and the right worm The gear portion of the gear (15) meshes with the right side gear (14), and the marked point of the right worm gear (15) should be aligned with the tooth root of the right side gear (14).

The positional relationship between the spiral starting point position of all left-hand worm gears (5) and right-hand worm gears (15) and the marking points should be consistent.

The number of teeth of the left side gear (4) and the right side gear (14) should be divisible by the number of left worm gears (5) or right worm gears (15). (Example; there are three left worm gears (5) that cooperate with the left side gear (4), that is, the number of teeth of the left side gear (4) should be divisible by three).

The working principle of the differential of the present invention is: when the automobile is driving on the pavement road, the power is transmitted to the gear mounting end cover (3), the housing (1), the end cover (2), (the gear mounting end at this time) The cover (3), the housing (1) and the end cover (2) are integral parts of the mounting assembly, and drive the inner left worm gear (5) and the rightward worm gear (15) to revolve, and transmit power to the left half shaft gear. (4) and the right side gear (14), driving the car, when the car turns (assuming a left turn), the left and right wheels produce a difference in speed, the road applies a backward force to the left wheel, and the right wheel is applied forward. Acceleration force, at this time, the left side gear (4) transmits the torque driving turbine (6) to the left worm gear (5), and the right side gear (14) transmits the torque driving turbine to the right worm gear (15) (6) , to achieve the difference. When there is a wheel that is suspended or slipped (assuming the right wheel is suspended or slipped), the right wheel has no road surface to apply to it. Forward acceleration force or backward reverse force. At this time, the right side gear (14) does not transmit torque to the right worm gear (15), and does not drive the turbine (6). At this time, the road applies rearward to the left wheel. In the reverse force, the left side gear (4) transmits the torque to the left worm gear (5) to drive the turbine (6), and the turbine (6) transmits the torque to the right worm gear (15). At this time, the self-locking principle of the worm is utilized. The turbine (6) cannot drive the right-hand worm gear (15), which realizes the automatic locking of the differential without the problem of switching shock and hysteresis.

In the above embodiment, the adaptive lock differential is a device that realizes a difference in the left and right wheel speeds, and can also serve as a center differential that releases the difference between the front wheel and the rear wheel.

Claims

An adaptive lock differential characterized by comprising a housing (1), an end cover (2), a gear mounting end cover (3), a left side shaft gear (4), a right side shaft gear (14), The left worm gear (5), the right worm gear (15), the turbine (6), the gear portion of the left worm gear (5) meshes with the left side gear (4), and the right worm gear (15) The gear portion meshes with the right side gear (14), and the worm portions of the left worm gear (5) and the right worm gear (15) mesh with the turbine (6).
The adaptive lock differential according to claim 1, wherein both ends of the left worm gear (5) and the right worm gear (15) are respectively associated with the end cover (2) and the gear mounting end cover (3) Connection cooperation.
The adaptive lock differential according to claim 1, characterized in that the turbine (6) is coupled to the housing (1).
The adaptive lock differential according to claim 1, characterized in that the housing (1), the end cover (2) and the gear mounting end cover (3) are assembled and integrated.
The adaptive lock differential of claim 1 wherein the left worm gear (5) and the right worm gear (15) are left and right side mounts of the same worm gear.
The adaptive lock differential of claim 1 wherein the left side gear (4) of the right side gear (14) is the same half shaft gear mounted in the left and right side positions.
The adaptive lock differential according to claim 1, wherein the worm portions of the left worm gear (5) and the right worm gear (15) are respectively meshed with the turbine (6), and the turbine (6) and the left The center distance to the worm gear (5) should be one-half of the center-to-center distance between the left half-shaft gear (4) and the left-hand worm gear (5), and the turbine (6) and the right-hand worm gear (15) The center distance should be one-half of the center-to-center distance between the right side gear (14) and the left-hand worm gear (15).
The adaptive lock differential according to claim 1, wherein the gear portion of the left worm gear (5) meshes with the left side gear (4), and the left worm gear (5) should be fitted when mating. The pair of marking points is in the root of the left side gear (4), the gear part of the right worm gear (15) is meshed with the right side gear (14), and the right worm gear (15) should be marked when fitted. Point to the root of the right half shaft gear (14).
The adaptive lock differential according to claim 1, characterized in that the positional relationship between the position of the spiral starting point of all the left worm gears (5) and the right worm gear (15) and the marking points should be consistent. .
The adaptive lock differential according to claim 1, characterized in that the number of teeth of the left side gear (4) and the right side gear (14) is to be matched with the left worm gear (5) Or the number of right-hand worm gears (15) is divisible (for example; there are three left-hand worm gears (5) that cooperate with the left side gear (4), that is, the number of teeth of the left side gear (4) should be divisible by three).