Automatic limited slip differential assembly and drive axle having the same

Abstract

The present invention discloses an automatic limited slip differential assembly and a drive axle with the same. The limited slip differential includes a large differential housing, a small differential housing, a left housing, a right housing, a differential shaft, a half-axle gear, a planetary bevel gear set, a bevel gear gasket and a friction plate; the drive axle with the limited slip differential assembly also includes a drive axle housing welding assembly, a left half-axle, a right half-axle, and a main reduction power transmission component. The automatic limited slip differential provided by the present invention adopts two buckle-type differential shaft combinations, which can enhance the anti-wear effect of the gears; multiple groups of cross-arranged internal and external tooth slotted friction plates are arranged to prevent friction loss, and can automatically and evenly distribute the left and right power outputs, thereby increasing the anti-skid effect and service life; it can be applied to the drive axles of mechanical equipment such as high-horsepower tractors and loaders, and can adapt to 180-240 horsepower power. The power is automatically and evenly distributed during the anti-skid process, and no manual operation is required. The anti-skid and power transmission effects are good, and the service life is long.

Description

Technical Field

[0001] The present invention relates to the technical field of differentials, and more particularly to an automatic limited slip differential assembly and a drive axle having the same. Background Art

[0002] The car differential is a mechanism that enables the left and right (or front and rear) drive wheels to rotate at different speeds. It is mainly composed of left and right half-shaft gears, two planetary gears and a gear rack. The function is to make the left and right wheels roll at different speeds when the car is turning or driving on uneven roads, that is, to ensure that the drive wheels on both sides perform pure rolling motion. The differential is installed to adjust the speed difference between the left and right wheels. In four-wheel drive, in order to drive the four wheels, all the wheels must be connected. If the four wheels are mechanically connected together, the car cannot rotate at the same speed when driving on a curve. In order to make the rotation speed of the car basically consistent when driving on a curve, an intermediate differential needs to be added to adjust the speed difference between the front and rear wheels.

[0003] High-horsepower agricultural tractors, engineering loaders and other mechanical equipment are widely used. In order to enhance the passing performance of mechanical equipment under harsh working environments and heavy loads, higher requirements are placed on the power transmission and service life of the differential.

[0004] Therefore, how to provide an automatic limited slip differential assembly and a drive axle having the same with high passability, easy operation, stronger wear resistance and performance is a problem that technical personnel in this field need to solve urgently. Summary of the invention

[0005] In view of this, the present invention provides an automatic limited slip differential assembly, aiming to solve the above technical problems.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] An automatic limited slip differential assembly includes: a large differential housing, a small differential housing, a left housing, a right housing, a differential shaft, a half-shaft gear, a planetary bevel gear set, a bevel gear gasket and a friction plate;

[0008] The large differential housing and the small differential housing are both annular cylindrical structures, and are sealed and butted together to form an integrated cylindrical structure, and the butt joint has fixing holes with cross axes;

[0009] The left housing is sealed and fixed to the open end of the large differential housing; the right housing is sealed and fixed to the open end of the small differential housing; the left housing and the right housing are provided with coaxial mounting holes, and the axes of the mounting holes coincide with the axes of the large differential housing and the small differential housing;

[0010] There are two differential shafts, which are arranged in a cross-shaped buckle arrangement, and the ends of the two differential shafts are clamped and fixed in corresponding fixing holes;

[0011] There are two axle gears, and the tooth surfaces are arranged inside the left housing and the right housing opposite to each other, and are respectively connected to the left housing and the right housing in a coaxial rotation;

[0012] The planetary bevel gear set is rotatably connected to the differential shaft and meshes with the side shaft gears;

[0013] The bevel gear gasket is sleeved on the differential shaft and is located between the planetary bevel gear set and the fixing hole; the number of the bevel gear gaskets is 4 and they are matched with the outer end surface of the planetary bevel gear set;

[0014] There are multiple friction plates, which are staggered on the axial surface of the half-shaft gear and are respectively padded between the end surface of the half-shaft gear and the inner end surface of the left housing, and between the end surface of the half-shaft gear and the inner end surface of the right housing.

[0015] Through the above technical scheme, the automatic limited slip differential provided by the present invention adopts two buckle-type differential shaft combinations, which can enhance the anti-wear effect of gears; multiple sets of cross-arranged internal and external tooth slotted friction plates are set to prevent friction loss, and can automatically and evenly distribute the left and right power outputs, increase the anti-skid effect and service life; the differential power transmission gear adopts a large pressure angle, which can not only transmit a large torque, but also maximize the distribution of left and right output power. It can adapt to 180-240 horsepower power, and the power is automatically and evenly distributed during the anti-skid process, without manual operation, with good anti-skid and power transmission effects and long service life.

[0016] Preferably, in the above-mentioned automatic limited slip differential assembly, the friction plates include outer tooth friction plates and inner tooth friction plates; the outer tooth friction plates and the inner tooth friction plates are arranged alternately in sequence, and the outer outer tooth friction plates are in contact with the end face of the half-shaft gear, and the outer inner tooth friction plates are in contact with the inner end face of the left housing or the right housing. By arranging the outer tooth friction plates and the inner tooth friction plates with rigid slotted structures and making them arranged alternately, the anti-slip and anti-wear performances are further improved, and the use effect is good.

[0017] Preferably, in the above-mentioned automatic limited slip differential assembly, the outer gear friction plates and the inner gear friction plates in each group of friction plates are each two plates in the left and right cavities, which can meet the use requirements.

[0018] Preferably, in the above-mentioned automatic limited slip differential assembly, the outer tooth friction plate is an outer tooth structure, the inner tooth friction plate is an inner tooth structure, and the mating surface of the outer tooth friction plate and the inner tooth friction plate is a rigid slotted structure, which can meet the use requirements and further improve the limited slip effect.

[0019] Preferably, in the above-mentioned automatic limited slip differential assembly, the inner diameter circumferential direction of the large differential housing and the small differential housing is provided with four receiving grooves for cooperating with bevel gear washers. The receiving grooves cooperate with the bevel gear washers to prevent friction loss between the gear and the inner ring.

[0020] Preferably, in the above-mentioned automatic limited slip differential assembly, the bevel gear gasket is a square structure and has a groove on its surface. The groove can fix the square bevel gear gasket to prevent friction loss between the planetary bevel gear assembly and the inner ends of the differential large shell and the differential small shell.

[0021] Preferably, in the above-mentioned automatic limited slip differential assembly, the outer circumferential surface of the large differential housing has a protruding flange for fixedly connecting with the large gear plate for power transmission, so as to facilitate fixed connection with the large gear plate.

[0022] Preferably, in the above-mentioned automatic limited slip differential assembly, the left housing, the large differential housing, the small differential housing and the right housing are integrally fastened and connected by bolts and nuts, and the nuts are locked by locking plates, which makes the connection simple, reliable and structurally stable.

[0023] The present invention also provides a drive axle with a limited slip differential assembly, comprising a drive axle housing welding assembly, a left half shaft, a right half shaft and a main reduction power transmission component;

[0024] The drive axle housing welded assembly is a long rod cavity structure with a spherical protrusion in the middle, and two connecting plates are cast on it for connecting and installing with the mechanical equipment frame. Wheel side support shafts are welded at both ends of the drive axle housing welded assembly, and wheel side power transmission components and wheel side brake assemblies are installed on the wheel side support shafts; the limited slip differential assembly is arranged in the middle of the cavity of the drive axle housing welded assembly;

[0025] One end of the left half shaft passes through the mounting hole of the left housing and is fixedly connected to the half shaft gear close to the left housing, and the other end is transmission-connected to the wheel side power transmission assembly;

[0026] One end of the right half shaft passes through the mounting hole of the right housing and is fixedly connected to the half shaft gear close to the right housing, and the other end is transmission-connected to the wheel side power transmission assembly;

[0027] The main reduction power transmission assembly is drivingly connected to the flange plate on the outer side of the differential large housing through a large gear plate.

[0028] Through the above technical scheme, the present invention provides a drive axle with an automatic limited slip differential, which can be applied to the drive axles of mechanical equipment such as high-horsepower tractors and loaders, overcoming the problems of poor performance of mechanical equipment, weak differential power transmission and low service life under harsh working environments and heavy loads.

[0029] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses an automatic limited slip differential assembly and a drive axle having the same, which have the following beneficial effects:

[0030] 1. The automatic limited slip differential provided by the present invention adopts two buckle-type differential shaft combinations, which can enhance the anti-wear effect of gears; multiple sets of cross-arranged internal and external tooth slotted friction plates are set to prevent friction loss, automatically and evenly distribute the left and right power outputs, and increase the anti-skid effect and service life; the differential power transmission gear adopts a large pressure angle, which can not only transmit a large torque, but also maximize the even distribution of the left and right output power. It can adapt to 180-240 horsepower power, and the power is automatically evenly distributed during the anti-skid process, without manual operation, with good anti-skid and power transmission effects and long service life.

[0031] 2. The present invention further improves the anti-skid and anti-wear performance by arranging the outer tooth friction plate and the inner tooth friction plate in a staggered manner, and has a good use effect.

[0032] 3. The present invention provides a drive axle with an automatic limited slip differential, which can be applied to high-horsepower tractors, loaders and other mechanical equipment, overcoming the problem that the differential is easily worn due to the large load, impact load and driving horsepower of various heavy mechanical equipment, thereby improving the performance and service life of the drive axle. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0034] Figure 1 The accompanying drawing is a schematic structural diagram of a limited slip differential assembly provided by the present invention;

[0035] Figure 2 The accompanying drawing is a schematic structural diagram of a drive axle with a limited slip differential assembly provided by the present invention.

[0036] in:

[0037] 1- Differential housing;

[0038] 2- Differential small housing;

[0039] 3- left housing;

[0040] 4-right housing;

[0041] 5- Differential shaft;

[0042] 6- side shaft gear;

[0043] 7-Planetary bevel gear;

[0044] 8-Friction plate;

[0045] 9-Fixing hole;

[0046] 10-Mounting hole;

[0047] 11-external tooth friction plate;

[0048] 12-internal tooth friction plate;

[0049] 13-accommodating tank;

[0050] 14-bevel gear gasket;

[0051] 15-flange;

[0052] 16-bolt;

[0053] 17- nut;

[0054] 18-Drive axle housing welding assembly;

[0055] 19-left half shaft;

[0056] 20-right half shaft;

[0057] 21- large gear plate;

[0058] 22-main reduction power transmission assembly;

[0059] 23-Connection plate

[0060] 24-wheel side power transmission assembly;

[0061] 25-wheel brake assembly;

[0062] 26-wheel side support shaft;

[0063] 27-Lock plate. DETAILED DESCRIPTION

[0064] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0065] Embodiment 1:

[0066] The embodiment of the present invention discloses an automatic limited slip differential assembly, comprising: a large differential housing 1, a small differential housing 2, a left housing 3, a right housing 4, a differential shaft 5, a half shaft gear 6, a planetary bevel gear set 7, a bevel gear gasket 14 and a friction plate 8;

[0067] The differential large housing 1 and the differential small housing 2 are both annular cylindrical structures, and are sealed and butted together to form an integrated cylindrical structure, and the butt joint has a fixing hole 9 with a cross axis;

[0068] The left housing 3 is sealed and fixed to the open end of the differential large housing 1; the right housing 4 is sealed and fixed to the open end of the differential small housing 2; the left housing 3 and the right housing 4 are provided with coaxial mounting holes 10, and the axis of the mounting hole 10 coincides with the axis of the differential large housing 1 and the differential small housing 2;

[0069] There are two differential shafts 5, and they are arranged in a cross-shaped buckle arrangement, and the ends of the two differential shafts 5 are clamped and fixed in the corresponding fixing holes 9;

[0070] There are two side gears 6, and the tooth surfaces are arranged inside the left housing 3 and the right housing 4 opposite to each other, and are coaxially rotatably connected to the left housing 3 and the right housing 4 respectively;

[0071] The planetary bevel gear set 7 is rotatably connected to the differential shaft 5 and meshes with the side gear 6;

[0072] The bevel gear washer 14 is sleeved on the differential shaft 5 and is located between the planetary bevel gear set 7 and the fixing hole 9;

[0073] There are multiple friction plates 8, which are staggered on the axial surface of the half-shaft gear 6 and are respectively padded between the end surface of the half-shaft gear 6 and the inner end surface of the left housing 3, and between the end surface of the half-shaft gear 6 and the inner end surface of the right housing 4.

[0074] In order to further optimize the above technical solution, the friction plate 8 includes an outer tooth friction plate 11 and an inner tooth friction plate 12; the outer tooth friction plate 11 and the inner tooth friction plate 12 are arranged alternately in sequence, and the outer outer tooth friction plate 11 is in contact with the end face of the half-shaft gear 6, and the outer inner tooth friction plate 12 is in contact with the inner end face of the left housing 3 or the right housing 4.

[0075] In order to further optimize the above technical solution, there are two outer-tooth friction plates 11 and two inner-tooth friction plates 12 in each group of friction plates 8 .

[0076] In order to further optimize the above technical solution, the outer tooth friction plate 11 is an outer tooth structure, and the inner tooth friction plate 12 is an inner tooth structure; the mating surfaces of the outer tooth friction plate 11 and the inner tooth friction plate 12 are rigid slotted structures.

[0077] In order to further optimize the above technical solution, four receiving grooves 13 for cooperating with the bevel gear gaskets 14 are opened in the inner diameter circumferential direction of the large differential housing 1 and the small differential housing 2 .

[0078] In order to further optimize the above technical solution, the bevel gear gasket 14 is a square structure and has grooves on its surface.

[0079] In order to further optimize the above technical solution, the outer circumferential surface of the differential large housing 1 is provided with a protruding flange 15 for fixedly connecting with the large gear plate 21 for power transmission.

[0080] In order to further optimize the above technical solution, the left housing 3, the large differential housing 1, the small differential housing 2 and the right housing 4 are integrally fastened together by bolts 16 and nuts 17, and the nuts 17 are locked by locking plates 27.

[0081] Embodiment 2:

[0082] The embodiment of the present invention discloses a drive axle with a limited slip differential assembly, a drive axle housing welding assembly 18, a left half shaft 19, a right half shaft 20 and a main reduction power transmission assembly 22;

[0083] The drive axle housing welded assembly 18 is a long rod cavity structure with a spherical protrusion in the middle, and two connecting plates 23 are cast on it for connecting and installing with the mechanical equipment frame. Wheel side support shafts 26 are welded at both ends of the drive axle housing welded assembly 18, and wheel side power transmission components 24 and wheel side brake assemblies 25 are installed on the wheel side support shafts 26; the limited slip differential assembly is arranged in the middle of the cavity of the drive axle housing welded assembly 18;

[0084] One end of the left half shaft 19 passes through the mounting hole 10 of the left housing 3 and is fixedly connected to the half shaft gear 6 close to the left housing 3, and the other end is transmission-connected to the wheel side power transmission assembly 24;

[0085] One end of the right half shaft 20 passes through the mounting hole 10 of the right housing 4 and is fixedly connected to the half shaft gear 6 close to the right housing 4, and the other end is drivingly connected to the wheel side power transmission assembly 24;

[0086] The main reduction power transmission assembly 22 is drivingly connected to the flange 15 on the outer side of the differential large housing 1 through the large gear plate 21.

[0087] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0088] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic limited slip differential assembly, characterized in that: include: A differential large housing (1), a differential small housing (2), a left housing (3), a right housing (4), a differential shaft (5), a half-shaft gear (6), a planetary bevel gear set (7), a bevel gear gasket (14) and a friction plate (8); The large differential housing (1) and the small differential housing (2) are both annular cylindrical structures, and are sealed and butted together to form an integrated cylindrical structure, and the butt joint has fixing holes (9) with cross axes; The left housing (3) is sealed and fixed to the open end of the differential large housing (1); the right housing (4) is sealed and fixed to the open end of the differential small housing (2); the left housing (3) and the right housing (4) are provided with coaxial mounting holes (10), and the axes of the mounting holes (10) coincide with the axes of the differential large housing (1) and the differential small housing (2); The number of the differential shafts (5) is two, and the differential shafts (5) are arranged in a cross-shaped buckle arrangement, and the ends of the two differential shafts (5) are clamped and fixed in corresponding fixing holes (9); The number of the half-shaft gears (6) is two, and the tooth surfaces are arranged inside the left housing (3) and the right housing (4) with each other facing each other, and are respectively connected to the left housing (3) and the right housing (4) in a coaxial rotational manner; The planetary bevel gear set (7) is rotatably connected to the differential shaft (5) and meshes with the half-shaft gear (6); The bevel gear gasket (14) is sleeved on the differential shaft (5) and is located between the planetary bevel gear set (7) and the fixing hole (9); The friction plates (8) are multiple in number and are staggeredly sleeved on the axial surface of the half-shaft gear (6), and are respectively cushioned between the end surface of the half-shaft gear (6) and the inner end surface of the left housing (3), and between the end surface of the half-shaft gear (6) and the inner end surface of the right housing (4); The friction plate (8) comprises an outer tooth friction plate (11) and an inner tooth friction plate (12); the outer tooth friction plate (11) and the inner tooth friction plate (12) are arranged alternately in sequence, and the outer outer tooth friction plate (11) is in contact with the end surface of the half-shaft gear (6), and the outer inner tooth friction plate (12) is in contact with the inner end surface of the left housing (3) or the right housing (4); Four receiving grooves (13) for cooperating with bevel gear washers (14) are provided in the inner diameter circumferential direction of the large differential housing (1) and the small differential housing (2); The outer circumferential surface of the differential large housing (1) is provided with a protruding flange (15) for fixedly connecting to a large gear plate (21) of a main reduction power transmission assembly (22).

2. The automatic limited slip differential assembly according to claim 1, characterized in that: The outer tooth friction plate (11) and the inner tooth friction plate (12) in each group of friction plates (8) are both two plates.

3. An automatic limited slip differential assembly according to claim 1 or 2, characterized in that: The outer tooth friction plate (11) is an outer tooth structure, and the inner tooth friction plate (12) is an inner tooth structure; the mating surfaces of the outer tooth friction plate (11) and the inner tooth friction plate (12) are rigid slotted structures.

4. The automatic limited slip differential assembly according to claim 1, characterized in that: The bevel gear gasket (14) is of a square structure and has a groove on its surface.

5. The automatic limited slip differential assembly according to claim 1, characterized in that: The left housing (3), the large differential housing (1), the small differential housing (2) and the right housing (4) are integrally fastened together by bolts (16) and nuts (17), and the nuts (17) are locked by locking plates (27).

6. A drive axle having a limited slip differential assembly according to any one of claims 1 to 5, characterized in that: It comprises a drive axle housing welding assembly (18), a left half shaft (19), a right half shaft (20) and a main reduction power transmission component (22); The drive axle housing welded assembly (18) is a long rod cavity structure with a spherical protrusion in the middle, and two connecting plates (23) are cast on it for connecting and installing with a mechanical equipment frame. Wheel side support shafts (26) are welded at both ends of the drive axle housing welded assembly (18), and a wheel side power transmission component (24) and a wheel side brake assembly (25) are installed on the wheel side support shaft (26); the limited slip differential assembly is arranged in the middle of the cavity of the drive axle housing welded assembly (18); One end of the left half shaft (19) passes through the mounting hole (10) of the left housing (3) and is fixedly connected to the half shaft gear (6) close to the left housing (3), and the other end is drivingly connected to the wheel side power transmission assembly (24); One end of the right half shaft (20) passes through the mounting hole (10) of the right housing (4) and is fixedly connected to the half shaft gear (6) close to the right housing (4), and the other end is drivingly connected to the wheel side power transmission assembly (24); The main reduction power transmission assembly (22) is drivingly connected to the flange (15) on the outside of the differential large housing (1) via a large gear plate (21).

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