CN109973611A - Differential assembly and assembly method between a kind of novel commercial wheel - Google Patents

Abstract

The invention discloses a novel commercial inter-wheel differential assembly and an assembling method, belonging to the technical field of automobile manufacturing. The structure on the right shell of the differential, and with a good lubrication system, not only eliminates the occurrence of the breakage of the driven bevel gear connecting bolts, the tooth beating of the driving and driven bevel gears, and the serious spherical wear of the planetary gears of the differential shell, etc. In addition, it also reduces the number of connecting parts, which facilitates the processing and assembly process, improves the production cycle, and increases the transmission efficiency and reliability of the product. Compared with the original structure, the weight is reduced by 7.9%, and the cost is reduced by about 6%. Compared with the inter-wheel differential assembly, the right case of the differential can be universally interchanged, which is not only conducive to the production organization, but also improves the interchangeability of products and the organization efficiency of spare parts in the market, thus achieving lightweight, The purpose of economical and lean production.

Description

A new type of commercial inter-wheel differential assembly and assembly method

technical field

The invention belongs to the technical field of automobile manufacturing, and in particular relates to a novel commercial inter-wheel differential assembly and an assembling method.

Background technique

The inter-wheel differential assembly is set up to adjust the speed difference between the left and right drive wheels. When the car is turning or driving on uneven roads, in order to ensure that the left and right driving wheels can roll at different speeds, the inter-wheel differential assembly is required to perform differential speed on the left and right driving wheels, so as to ensure that the driving wheels on both sides can be driven differently. Do pure rolling motion. To provide an inter-wheel differential assembly with stable quality, excellent lubrication, high transmission efficiency, few parts, light weight, good assembly process performance and low price will definitely bring advantages to enterprises in the fierce market competition.

The inter-wheel differential assembly structure commonly used in the market now is shown in Figure 10 and Figure 11: 1. The driven bevel gear is connected to the left differential casing through bolts; 2. The cross shaft holes are respectively on the left side of the differential The upper part of the casing and the right casing of the differential are half, that is, firstly connect the left casing of the differential to the right casing of the differential through bolts, and then add a cross shaft hole; 3. The planetary gear gasket is not anti-rotation. The disadvantages of using the above structure are: 1. When the vehicle is running under heavy load, and when the vehicle is running in reverse and reverse directions, it is easy to cause fatigue fracture of the connecting bolts of the driven bevel gear; 2. Because the cross shaft hole of this structure passes through the left, The right differential case is processed by closing the case, the process is complex, and the processing steps are many, which affects the production rhythm when the output is large; 3. When the road conditions of the car are many curves, the left and right driving wheels rotate at different speeds, and the difference between the wheels is different. When the gear is running at all times, because the planetary gear gasket is not anti-rotation, it will cause serious wear on the spherical surface of the planetary gear of the differential case.

Since this structure uses bolts to connect the driven bevel gear and the differential sub-assembly, the feedback connection bolts are broken, the driving and driven bevel gears are beaten, and the spherical surface of the differential case planetary gear is severely worn. , and this kind of structure is difficult to guarantee the assembly accuracy, affects the transmission efficiency, the processing and assembly process is complicated, and the overall quality is large.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a new type of commercial inter-wheel differential assembly and an assembling method in view of the above-mentioned deficiencies of the prior art, which is improved on the existing inter-wheel differential assembly, and is compatible with the reducer assembly. On the premise that the assembly does not affect the interchangeability, the structure that the driven bevel gear is integrated with the left casing of the differential, the anti-rotation planetary gear gasket and the anti-rotation cross shaft assembly are integrated into the right casing of the differential, and the There is a good lubrication system to provide an inter-wheel differential assembly with stable quality, excellent lubrication, high transmission efficiency, few parts, light weight, good assembly process and low price.

The present invention is achieved through the following technical solutions:

A new type of commercial inter-wheel differential assembly, comprising an integral driven bevel gear 1, a differential right shell assembly 2 and a differential bearing 5; the differential right shell assembly 2 includes a side gear 3. Axle gear washer 4, differential right housing 7, anti-rotation planetary gear washer 8, planetary gear 9, anti-rotation cross shaft assembly 10 and elastic cylindrical pin 11;

A differential bearing 5 is installed on the left end of the integral driven bevel gear 1 along the outer side in the diameter direction; the differential right housing assembly 2 is arranged on the right side of the integral driven bevel gear 1; A differential bearing 5 is also installed at the right end of the right differential case assembly 2 along the outer side in the diametric direction, and a side gear washer 4 is arranged in the middle of the right differential case assembly 2 along the inner side in the diametric direction. , a side gear 3 is arranged on the left side of the side gear washer 4, and an anti-rotation cross shaft assembly 10 is arranged on the left end of the side gear 3 and the left side of the differential right shell assembly 2, Four anti-rotation planetary gear washers 8 are arranged on the four shaft rods of the anti-rotation cross shaft assembly 10 and inside the left side of the differential right housing assembly 2 , and the inner side of the anti-rotation planetary gear washer 8 is provided with four anti-rotation planetary gear washers 8 . Planetary gear 9.

Further, the integrated driven bevel gear 1 is integrally forged from the driven bevel gear 1-1 and the differential left housing 1-2; the driven bevel gear 1-1 is provided on the inner end face of the diametrical direction. There are matching holes 1-8 in the right case of the differential, and the matching holes 1-8 in the right case of the differential are used to match the mating surfaces 7-8 of the integrated driven bevel gear set on the right case 7 of the differential. ; The inner side of the middle part of the left casing 1-2 of the differential is provided with a matching surface 1-7 of the side gear washer for installing the side gear washer 4; the left end of the left casing 1-2 of the differential is along the diameter A differential bearing mating surface 1-3 is arranged on the outer side of the direction, which is used to match with the inner ring roller bearing of the differential bearing 5; the left housing 1-2 of the differential is evenly distributed on the middle large flange surface. Connecting bolt holes 1-10 are used to connect with the connecting threaded holes 7-9 provided on the right differential case 7 through the connecting bolts 6, so as to connect the integral driven bevel gear 1 with the differential right case 7 The connection and fixing become a rigid whole; the left end surface of the left housing 1-2 of the differential is provided with the end face splines 1-9 of the differential lock between the wheels, and the end face splines 1-9 of the differential lock between the wheels are used to connect with the wheels. The inter-differential locks are matched with the moving gear sleeves, thereby preventing the left and right driving wheels from differential speed, so as to improve the driving force of the drive axle and improve the passing capacity of the whole vehicle; the connecting bolt holes 1-10 are matched with the differential bearing. A circle of first weight-reducing holes 1-6 are evenly distributed on the outer casing of the left differential case 1-2 between 1-3, and first weight-reducing grooves 1 are alternately arranged between the first weight-reducing holes 1-6 -4 and the second weight reduction slot 1-5.

Further, the length of the first weight reduction groove 1 - 4 is smaller than that of the second weight reduction groove 1 - 5 , so as to ensure the strength of the integral driven bevel gear 1 .

Further, the left end of the differential case 7 is provided with an integrated driven bevel gear matching surface 7-8 along the outer side of the diameter direction, and the integrated driven bevel gear matching surface 7-8 is used for the integrated driven bevel gear matching surface 7-8. The right differential housing matching holes 1-8 provided on the moving bevel gear 1 are matched and connected; the right end of the differential right housing 7 is provided with a differential bearing mounting surface 7-5 along the outer side of the diameter direction, which is used for The inner ring roller bearing of the differential bearing 5 is matched with the inner ring roller bearing; the middle part of the right housing 7 of the differential is provided with a side gear washer mating surface 7-4 on the inner right side along the diameter direction, which is used for installing the side gear washer 4 ; Four elastic cylindrical pin mounting holes 7-2 are evenly distributed on the matching surface 7-8 of the integrated driven bevel gear for installing the elastic cylindrical pin 11; the integrated driven bevel gear matching surface 7-8 There are also several connecting threaded holes 7-9 evenly distributed on the upper part, and the connecting threaded holes 7-9 are used to connect the integral driven bevel gear 1 and the differential right shell 7 to a rigid whole through the connecting bolts 6; Four evenly distributed anti-rotation cross shaft mounting holes 7-1 are arranged on the housing between the one-piece driven bevel gear mating surface 7-8 and the side shaft gear washer mating surface 7-4. The shaft mounting hole 7-1 is used to install the anti-rotation cross shaft assembly 10; in the four evenly distributed anti-rotation cross shaft mounting holes 7-1 along the inner side of the axial direction, there is an anti-rotation planetary gear washer spherical mating surface 7- 3; a plurality of second weight reduction holes 7-6 are evenly distributed along the circumferential direction on the housing between the integrated driven bevel gear mating surface 7-8 and the side gear washer mating surface 7-4, It is used to enable the gear lubricating oil to smoothly enter the interior of the inter-wheel differential assembly to enhance lubrication; reinforcing ribs 7-7 are arranged along the circumferential direction between the second weight-reducing holes 7-6 to strengthen the differential. Rigidity of the right shell 7.

Further, a number of oil storage pits 8-1 are evenly distributed along the circumferential direction on the anti-rotation planetary gear washer 8 for storing a number of lubricating oils in the pit grooves, and between the planetary gear 9 and the anti-rotation planetary gear When the gasket 8 is in motion, it can form an oil film, reduce the wear between the anti-rotation planetary gear gasket 8 and the planetary gear 9, and increase the service life of the parts; the center of the anti-rotation planetary gear gasket 8 is provided There is an anti-rotation cross shaft mounting hole 8-3, and the two side edges of the anti-rotation cross shaft mounting hole 8-3 along the outer side of the diameter direction are provided with anti-rotation flat 8-2, the anti-rotation flat 8-2 It is matched with the anti-rotation flattening 10-1-1 of the long planetary gear shaft and the anti-rotation flattening 10-2-1 of the short planetary gear shaft; The long planetary gear shaft anti-rotation flattening 10-1-1 set on the long planetary gear shaft 10-1 and the short planetary gear shaft anti-rotation flattening 10-2-1 set on the short planetary gear shaft 10-2 cooperate with each other. During the operation of the differential assembly, the planetary gear washer 8 can be restricted from rotating in the circumferential direction along the anti-rotation cross shaft assembly 10, so as to play an anti-rotation function, thereby eliminating the anti-rotation function set on the right case 7 of the differential. The problem of serious wear on the spherical mating surface 7-3 of the planetary gear gasket.

Further, the anti-rotation cross shaft assembly 10 is composed of a long planetary gear shaft 10-1 and two short planetary gear shafts 10-2, and the left and right sides of the long planetary gear shaft 10-1 are on the upper and lower planes. The long planetary gear shaft is provided with anti-rotation and flattening 10-1-1, and the middle part of the long planetary gear shaft 10-1 is provided with two short planetary gear shaft installation keyways 10-1-2; A short planetary gear shaft anti-rotation flattening 10-2-1 is provided on the upper and lower planes on the right side of the gear shaft 10-2, and a short planetary gear shaft installation key 10 is provided on the left end of the short planetary gear shaft 10-2. -2-2; The short planetary gear shaft installation keyway 10-1-2 cooperates with the short planetary gear shaft installation key 10-2-2 to form an anti-rotation cross shaft assembly 10.

A method for assembling a novel commercial inter-wheel differential assembly, comprising the following steps:

A. Use special tooling in advance to press-fit the differential bearing 5 to the differential bearing mating surface 1-3 and the differential bearing mounting surface 7 set on the one-piece driven bevel gear 1 and the differential right housing 7 respectively. -5, and ensure that the press is in place;

B. Place the bottom of the differential housing 7 with the differential bearing pressed down on the flat plate, and the bottom is the side with the differential bearing mounting surface 7-5;

C. Place the side gear washer 4 in the right case 7 of the differential, so that the side gear spacer 4 is matched with the mating surface 7-4 of the side gear spacer set in the right case 7 of the differential, and then Put the side gear 3 on the side gear washer 4;

D. Install half of the long planetary gear shaft 10-1 into the anti-rotation cross shaft mounting hole 7-1 provided on the right 7 of the differential; install the anti-rotation planetary gear washer 8 into the long planetary gear shaft 10-1 Install the planetary gear 9 in the middle, and install the planetary gear 9 and the anti-rotation planetary gear washer 8 on the corresponding side in turn; fully assemble the long planetary gear shaft 10-1 in place, and ensure that the long planetary gear shaft is set The short planetary gear shaft installation keyway 10-1-2 is parallel to the centerline of the differential right shell 7;

E. Install half of the short planetary gear shaft 10-2 into the anti-rotation cross shaft mounting hole 7-1 provided on the differential right housing 7; install the anti-rotation planetary gear washer 8 into the short planetary gear shaft 10- 2, and install the planetary gear 9; push the short planetary gear shaft 10-2 completely into place, so that the short planetary gear shaft installation key 10-2-2 set on the short planetary gear shaft 10-2 and the long planetary gear shaft The short planetary gear shaft installation keyway 10-1-2 set on 10-1 is completely matched; with the same assembly method, the short planetary gear shaft 10-2, anti-rotation planetary gear washer 8, planetary gear on the corresponding side 9 is assembled in place;

F. Use special tooling to install the elastic cylindrical pin 11 into the elastic cylindrical pin mounting hole 7-2 provided on the differential right housing 7, and ensure that it is assembled in place;

The differential right housing assembly 2 is assembled;

G. On the assembled right case assembly 2 of the differential, put the side gear 3, the side gear washer 4, the integrated driven bevel gear 1 in sequence, and ensure that the integrated driven bevel gear 1 The set connecting bolt holes 1-10 are aligned with the connecting threaded holes 7-9 set on the differential right housing 7;

H. Install the connecting bolts 6, and tighten the connecting bolts 6 with the specified torque;

Through the above operation steps, the assembly of a new type of commercial inter-wheel differential assembly described in this paper is completed.

Compared with the prior art, the advantages of the present invention are as follows:

1. The integral driven bevel gear structure is replaced by the original driven bevel gear and the bolt connection structure of the differential left shell; 2. The anti-rotation cross with planetary gear and anti-rotation planetary gear gasket is adopted The structure that the shaft assembly is integrated into the right shell of the differential replaces the original structure in which the left and right shells of the differential and the cross shaft assembly are connected by bolts; 3. The planetary gear washer with an anti-rotation structure is used to replace the original structure. Some non-anti-rotation planetary gear gaskets;

The present invention improves on the existing inter-wheel differential assembly, and adopts the integrated structure of the driven bevel gear and the left casing of the differential under the premise that the assembly with the reducer assembly does not affect the interchangeability, preventing rotation The planetary gear gasket and the anti-rotation cross shaft assembly are integrated into the right case of the differential, and have a good lubrication system. Under the premise of ensuring the normal operation of the internal parts of the differential assembly, it not only eliminates the The feedback of the driven bevel gear connecting bolts is broken, the main and driven bevel gears are beaten, the differential case planetary gear spherical surface is seriously worn, etc., and the number of connecting parts is also reduced, which facilitates the processing and assembly process and improves the production cycle. , which increases the transmission efficiency and reliability of the product. The most important thing is that the new structure of the inter-wheel differential assembly reduces the weight by 7.9% and the cost by about 6% compared with the original structure. The differential assembly and the right case of the differential can be interchanged universally, which is not only beneficial to the production organization, but also improves the interchangeability of products and the organization efficiency of spare parts in the market, thereby achieving lightweight, economical, The purpose of lean production.

Description of drawings

1 is an exploded view of a novel commercial inter-wheel differential assembly according to the present invention;

Figure 2a is a top view of the integrated driven bevel gear according to the present invention;

Figure 2b is a cross-sectional view of the integrated driven bevel gear according to the present invention;

Figure 2c is a bottom view of the integrated driven bevel gear according to the present invention;

3a is a schematic structural diagram of the differential right housing assembly according to the present invention;

Figure 3b is a top view of the differential right housing assembly according to the present invention;

Figure 4a is a top view of the differential right housing of the present invention;

4b is a cross-sectional view of the differential case of the present invention;

Figure 5a is a top view of the anti-rotation planetary gear washer according to the present invention;

Figure 5b is a side view of the anti-rotation planetary gear washer according to the present invention;

6 is a schematic structural diagram of the anti-rotation cross shaft assembly according to the present invention;

7 is a schematic structural diagram of the long planetary gear shaft according to the present invention;

8 is a schematic structural diagram of the short planetary gear shaft according to the present invention;

FIG. 9 is an assembly diagram of a new type of commercial inter-wheel differential assembly according to the present invention;

10 is an exploded view of the inter-wheel differential assembly in the prior art;

Figure 11 is an assembly drawing of the inter-wheel differential assembly in the prior art;

In the picture: 1. One-piece driven bevel gear; 2. Differential right shell assembly; 3. Axle gear; 4. Axle gear washer; 5. Differential bearing; 6. Connecting bolt; 7. Differential right shell; 8. Anti-rotation planetary gear gasket; 9. Planetary gear; 10-1. Long planetary gear shaft; 10-2. Short planetary gear shaft; 11. Elastic cylindrical pin;

1-1. Driven bevel gear; 1-2. Left differential housing; 1-3. Differential bearing mating surface; 1-4, 1-5. Weight reduction groove; 1-6. First weight reduction Hole; 1-7. Matching surface of side gear gasket; 1-8. Matching hole of right case of differential; 1-9. Spline on end face of differential lock between wheels; 1-10. Connecting bolt hole;

7-1. Anti-rotation cross shaft mounting hole; 7-2. Elastic cylindrical pin mounting hole; 7-3. Anti-rotation planetary gear gasket spherical surface; 7-4. Axle gear gasket matching surface; 7-5 . Differential bearing mounting surface; 7-6. Second weight reduction hole; 7-7. Reinforcing ribs; 7-8. One-piece driven bevel gear mating surface; 7-9. Connecting threaded holes;

8-1. Oil storage pit; 8-2. Anti-rotation flattening; 10-1. Long planetary gear shaft; 10-2. Short planetary gear shaft; 10-1-1. Long planetary gear shaft anti-rotation and flattening; 10-1-2. Short planetary gear shaft installation keyway; 10-2-1. Short planetary gear shaft anti-rotation flat; 10-2-2. Short planetary gear shaft installation key;

21-1. Driven bevel gear; 21-2. Left differential case; 23. Axle gear; 24. Axle gear washer; 25. Differential bearing; 26. Left and right differential case connecting bolts; 27. Differential right shell; 29. Planetary gear; 212. Planetary gear gasket; 213. Cross shaft; 214. Driven bevel gear connecting bolt;

Detailed ways

A new type of commercial inter-wheel differential assembly according to the present invention will be further described below with reference to the accompanying drawings.

As shown in Figures 1, 3a, 3b of the description and Figure 9 of the description, a new type of commercial inter-wheel differential assembly according to the present invention includes an integrated driven bevel gear 1, a right differential casing assembly 2 and the differential bearing 5; the differential right housing assembly 2 includes the side gear 3, the side gear washer 4, the differential right housing 7, the anti-rotation planetary gear washer 8, the planetary gear 9, Anti-rotation cross shaft assembly 10 and elastic cylindrical pin 11; a differential bearing 5 is installed on the left end of the integral driven bevel gear 1 along the outer side in the diameter direction; the differential right shell assembly 2 is provided On the right side of the one-piece driven bevel gear 1; a differential bearing 5 is also installed on the right end of the right differential case assembly 2 along the outer side of the diameter direction. A side gear washer 4 is arranged on the inner side in the diameter direction in the middle, and a side gear 3 is arranged on the left side of the side gear washer 4. At the left end of the side gear 3, the right side of the differential case An anti-rotation cross shaft assembly 10 is arranged on the left side, and four anti-rotation planetary gear pads are arranged on the four shaft rods of the anti-rotation cross shaft assembly 10 and inside the left side of the differential right shell assembly 2 Plate 8, a planetary gear 9 is arranged on the inner side of the anti-rotation planetary gear washer 8; the connecting bolt 6 is arranged on the large flange surface in the middle of the one-piece driven bevel gear 1, and the one-piece driven bevel gear 1 The moving bevel gear 1 and the differential right housing assembly 2 are combined to form a new type of commercial inter-wheel differential assembly described in this paper.

As shown in the accompanying drawings 2a, 2b and 2c, the one-piece driven bevel gear 1 is integrally forged from the driven bevel gear 1-1 and the left differential case 1-2; the driven bevel gear 1 -1 There are matching holes 1-8 on the inner end face of the differential case along the diameter direction. The matching surfaces 7-8 of the moving bevel gears are matched; the inner side of the middle part of the left casing 1-2 of the differential is provided with a matching surface 1-7 of the side gear washer for installing the side gear washer 4; the differential The left end of the left end of the differential gear housing 1-2 is provided with a differential gear bearing mating surface 1-3 along the outer side of the diameter direction, which is used for matching with the inner ring roller bearing of the differential gear gear bearing 5; the differential gear left housing 1-3 A number of connecting bolt holes 1-10 are evenly distributed on the large flange in the middle of The bevel gear 1 is connected and fixed to the right case 7 of the differential into a rigid whole; the left end face of the left case 1-2 of the differential is provided with the end face splines 1-9 of the inter-wheel differential lock, and the inter-wheel differential lock The function of the end face splines 1-9 is to cooperate with the moving gear sleeve of the differential lock between the wheels, so as to prevent the differential speed of the left and right driving wheels, so as to improve the driving force of the drive axle and improve the passing capacity of the whole vehicle; A circle of weight reduction holes 1-6 are evenly distributed on the outer casing of the left differential case 1-2 between the connecting bolt holes 1-10 and the differential bearing mating surface 1-3. The first weight reduction grooves 1-4 and the second weight reduction grooves 1-5 are alternately arranged;

Further, the length of the first weight reduction groove 1 - 4 is smaller than that of the second weight reduction groove 1 - 5 , so as to ensure the strength of the integral driven bevel gear 1 .

As shown in Figure 4a of the description and Figure 4b of the description, the left end of the right differential case 7 is provided with an integrated driven bevel gear matching surface 7-8 along the outer side of the diameter direction, and the integrated driven bevel gear matching surface The function of 7-8 is to cooperate with the matching holes 1-8 of the right differential case set on the integral driven bevel gear 1; There is a differential bearing mounting surface 7-5, which is used for matching with the inner ring roller bearing of the differential bearing 5; the middle part of the right housing 7 of the differential is provided with an axle gear washer on the inner right side of the diametrical direction. The surface 7-4 is used to install the side gear washer 4; the fitting surface 7-8 of the integrated driven bevel gear is evenly distributed with four elastic cylindrical pin mounting holes 7-2 for installing the elastic cylindrical pin 11 ; There are also several connecting threaded holes 7-9 evenly distributed on the matching surface 7-8 of the integrated driven bevel gear. The function of the connecting screw holes 7-9 is to connect the integrated driven bevel gear through the connecting bolt 6. 1 is fixedly connected with the right case 7 of the differential to form a rigid whole; the case between the one-piece driven bevel gear mating surface 7-8 and the side gear washer mating surface 7-4 is provided with four There are evenly distributed anti-rotation cross shaft mounting holes 7-1. The function of the anti-rotation cross shaft mounting holes 7-1 is to install the anti-rotation cross shaft assembly 10; in the four evenly distributed anti-rotation cross shaft mounting holes 7 -1 An anti-rotation planetary gear washer spherical surface mating surface 7-3 is provided along the inner side of the axial direction; the housing between the integrated driven bevel gear mating surface 7-8 and the side gear washer mating surface 7-4 There are also several weight-reducing holes 7-6 evenly distributed on the upper part along the circumferential direction, so that the gear lubricating oil can smoothly enter the inside of the inter-wheel differential assembly to enhance lubrication; the weight-reducing holes 7-6 are along the circumference Reinforcing ribs 7-7 are arranged in the direction to enhance the rigidity of the right case 7 of the differential.

As shown in Figures 5a and 5b of the description, the anti-rotation planetary gear washer 8 is evenly distributed with several oil storage pits 8-1 along the circumferential direction. A number of lubricating oils are stored, and when the planetary gear 9 and the anti-rotation planetary gear washer 8 move relative to each other, a lubricating oil film can be formed between the planetary gear 9 and the anti-rotation planetary gear washer 8, thereby Reduce the wear between the anti-rotation planetary gear washer 8 and the planetary gear 9, and increase the service life of the parts; the center of the anti-rotation planetary gear washer 8 is provided with an anti-rotation cross shaft mounting hole 8-3, The anti-rotation cross shaft mounting hole 8-3 is provided with an anti-rotation flat 8-2 along the two side edges of the outer side in the diameter direction. The anti-rotation flat 8-2 and the long planetary gear shaft anti-rotation flat 10-1- 1 and the anti-rotation flattening 10-2-1 of the short planetary gear shaft, through the anti-rotation flattening 8-2 set on the anti-rotation planetary gear washer 8 and the long planetary gear set on the long planetary gear shaft 10-1 The shaft anti-rotation flattening 10-1-1 and the short planetary gear shaft anti-rotation flattening 10-2-1 set on the short planetary gear shaft 10-2 can be combined to limit the planets during the operation of the differential assembly. The gear washer 8 rotates in the circumferential direction along the anti-rotation cross shaft assembly 10, so as to play an anti-rotation effect, thereby eliminating the serious wear of the spherical mating surface 7-3 of the anti-rotation planetary gear washer set on the right shell 7 of the differential. The problem.

As shown in Figures 6 to 8 of the description, two short planetary gear shaft mounting keyways 10-1-2 are provided in the middle of the long planetary gear shaft 10-1; the left end of the short planetary gear shaft 10-2 A short planetary gear shaft installation key 10-2-2 is arranged on it; two short planetary gear shaft installation keyways 10-1-2 and two short planetary gear shafts 10-2 are arranged on the long planetary gear shaft 10-1 The set short planetary gear shaft installation keys 10-2-2 are matched to form an anti-rotation cross shaft assembly 10; the long planetary gear shafts are provided on the upper and lower planes on the left and right sides of the long planetary gear shaft 10-1 to prevent rotation. Flat 10-1-1, the short planetary gear shaft anti-rotation flat 10-2-1 is arranged on the upper and lower planes on the right side of the short planetary gear shaft 10-2; the long planetary gear shaft 10-1 is arranged on the The long planetary gear shaft anti-rotation flattening 10-1-1 and the short planetary gear shaft anti-rotation flattening 10-2-1 set on the short planetary gear shaft 10-2 and the anti-rotation planetary gear gasket set on the anti-rotation The combination of the flat 8-2 can limit the circumferential rotation of the planetary gear washer 8 along the anti-rotation cross shaft assembly 10 during the operation of the differential assembly, so as to play an anti-rotation effect, thereby eliminating the differential speed. The spherical mating surface 7-3 of the anti-rotation planetary gear washer set on the right casing 7 of the device is seriously worn.

As shown in the accompanying drawings 1, 3a, 3b and 9 in the description, a method for assembling a novel commercial inter-wheel differential assembly includes the following steps:

A. Use special tooling in advance to press-fit the differential bearing 5 to the differential bearing mating surface 1-3 and the differential bearing mounting surface 7 set on the one-piece driven bevel gear 1 and the differential right housing 7 respectively. -5, and ensure that the press is in place;

B. Place the bottom of the differential housing 7 with the differential bearing pressed down on the flat plate, and the bottom is the side with the differential bearing mounting surface 7-5;

C. Place the side gear washer 4 in the right case 7 of the differential, so that the side gear spacer 4 is matched with the mating surface 7-4 of the side gear spacer set in the right case 7 of the differential, and then Put the side gear 3 on the side gear washer 4;

D. Install half of the long planetary gear shaft 10-1 into the anti-rotation cross shaft mounting hole 7-1 provided on the right 7 of the differential; install the anti-rotation planetary gear washer 8 into the long planetary gear shaft 10-1 Install the planetary gear 9 in the middle, and install the planetary gear 9 and the anti-rotation planetary gear washer 8 on the corresponding side in turn; fully assemble the long planetary gear shaft 10-1 in place, and ensure that the long planetary gear shaft is set The short planetary gear shaft installation keyway 10-1-2 is parallel to the centerline of the differential right shell 7;

E. Install half of the short planetary gear shaft 10-2 into the anti-rotation cross shaft mounting hole 7-1 provided on the differential right housing 7; install the anti-rotation planetary gear washer 8 into the short planetary gear shaft 10- 2, and install the planetary gear 9; push the short planetary gear shaft 10-2 completely into place, so that the short planetary gear shaft installation key 10-2-2 set on the short planetary gear shaft 10-2 and the long planetary gear shaft The short planetary gear shaft installation keyway 10-1-2 set on 10-1 is completely matched; with the same assembly method, the short planetary gear shaft 10-2, anti-rotation planetary gear washer 8, planetary gear on the corresponding side 9 is assembled in place;

F. Use special tooling to install the elastic cylindrical pin 11 into the elastic cylindrical pin mounting hole 7-2 provided on the differential right housing 7, and ensure that it is assembled in place;

The differential right housing assembly 2 is assembled;

G. On the assembled right case assembly 2 of the differential, put the side gear 3, the side gear washer 4, the integrated driven bevel gear 1 in sequence, and ensure that the integrated driven bevel gear 1 The set connecting bolt holes 1-10 are aligned with the connecting threaded holes 7-9 set on the differential right housing 7;

H. Install the connecting bolts 6, and tighten the connecting bolts 6 with the specified torque;

Through the above operation steps, the assembly of a new type of commercial inter-wheel differential assembly described in this paper is completed.

The structure of the invention not only eliminates the occurrence of problems such as the breakage of the driven bevel gear connecting bolts, the driving and driven bevel gears, and the serious wear of the spherical surface of the planetary gear of the differential case, which are fed back in the market, but also reduces the number of connecting parts, which is convenient for The processing and assembly process improves the production cycle and increases the transmission efficiency and reliability of the product. The most important thing is that the weight of the new structure of the inter-wheel differential assembly is reduced by 7.9% compared with the original structure, and the cost is reduced by about 6%. %, and for the inter-wheel differential assembly with different speed ratios, the right case of the differential can be interchanged universally, which is not only conducive to the production organization, but also improves the interchangeability of products and the organization efficiency of spare parts in the market. So as to achieve the purpose of lightweight, economical and lean production.

The above is only the best embodiment of the present invention and does not limit the present invention. Any modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still belong to the present invention. The scope of protection of technical solutions.

Claims (7)

1. differential assembly between a kind of novel commercial wheel, which is characterized in that including integral type driven bevel gear (1), differential The right housing assy of device (2) and differential bearing (5)；The differential right casing assembly (2) includes axle shaft gear (3), axle shaft gear pad Piece (4), differential right casing (7), anti-rotation planet gear pad (8), planetary gear (9), anti-rotation cross assemble (10) and elasticity Straight pin (11)；

The left end of the integral type driven bevel gear (1) diametrically outside install have a differential bearing (5)；Institute Right side of differential right casing assembly (2) setting stated in integral type driven bevel gear (1)；The differential right casing assembly (2) Right end diametrically outside equally install have a differential bearing (5), the middle part of the differential right casing assembly (2) Diametrically an axle shaft gear gasket (4) is arranged in inside, and the left side setting of axle shaft gear gasket (4) has a half axle gear It takes turns (3), has an anti-rotation cross assemble what the left end of axle shaft gear (3), the left side of differential right casing assembly (2) were arranged (10), four anti-rotations are internally provided on four shafts of anti-rotation cross assemble (10), on the left of differential right casing assembly (2) Planet gear pad (8) is provided with planetary gear (9) on the inside of anti-rotation planet gear pad (8).

2. differential assembly between a kind of novel commercial wheel as described in claim 1, which is characterized in that the integral type is driven Conical gear (1) is formed by driven bevel gear (1-1) and differential mechanism left housing (1-2) solid forging；The driven bevel gear What (1-1) was diametrically arranged on inner side end has differential right casing matching hole (1-8), the differential right casing matching hole (1-8) with the integral type driven bevel gear mating surface (7-8) being arranged on differential right casing (7) for matching；The differential Device left housing (1-2) inside middle portion is provided with axle shaft gear gasket mating surface (1-7), for installing axle shaft gear gasket (4)；It is described Diametrically outside is provided with differential bearing mating surface (1-3) for the left end of differential mechanism left housing (1-2), is used for and differential axle The inner ring roller bearing for holding (5) matches；Several companies are uniformly distributed on the middle part large flange face of the differential mechanism left housing (1-2) Connecting bolt hole (1-10) matches for the connection screw thread hole (7-9) by being arranged on connection bolt (6) and differential right casing (7) Connection is closed, to integral type driven bevel gear (1) and differential right casing (7) is connected and fixed whole as a rigidity；Institute State differential lock end face spline (1-9) between being provided with wheel on the left side of differential mechanism left housing (1-2), differential lock end face spline between wheel (1-9) is used for the mobile tooth set of the differential lock between wheel and matches, so that left and right driving wheel differential is prevented, to promote the drive of drive axle Power improves the handling capacity of vehicle；Differential between the link bolt hole (1-10) and differential bearing mating surface (1-3) It is evenly distributed with first lightening hole of circle (1-6) on device left housing (1-2) shell, is alternately set between first lightening hole (1-6) It is equipped with the first weight loss groove (1-4) and the second weight loss groove (1-5).

3. differential assembly between a kind of novel commercial wheel as described in claim 1, which is characterized in that first weight loss groove The length of (1-4) is smaller than the second weight loss groove (1-5), for guaranteeing the intensity of integral type driven bevel gear (1).

4. differential assembly between a kind of novel commercial wheel as described in claim 1, which is characterized in that the differential right casing (7) diametrically outside is provided with integral type driven bevel gear mating surface (7-8), integral type driven bevel gear for left end Mating surface (7-8) with the differential right casing matching hole (1-8) being arranged on the integral type driven bevel gear (1) for matching Connection；The right end of the differential right casing (7) diametrically outside be provided with differential bearing mounting surface (7-5), for The inner ring roller bearing of differential bearing (5) matches；Diametrically inside the right setting in the middle part of the differential right casing (7) There is axle shaft gear gasket mating surface (7-4), for installing axle shaft gear gasket (4)；The integral type driven bevel gear cooperation There are four being uniformly distributed on face (7-8) elastic cylindrical pin mounting hole (7-2), for installing elastic cylindrical pin (11)；The one Several connection screw thread holes (7-9), connection screw thread hole (7-9) are also evenly distributed in formula driven bevel gear mating surface (7-8) For integral type driven bevel gear (1) to be mutually fixedly connected as one just with differential right casing (7) by connection bolt (6) The entirety of property；Shell between the integral type driven bevel gear mating surface (7-8) and axle shaft gear gasket mating surface (7-4) Upper setting there are four equally distributed anti-rotation cross shaft mounting hole (7-1), anti-rotation cross shaft mounting hole (7-1) it is anti-for installing Turn cross assemble (10)；Four equally distributed anti-rotation cross shaft mounting holes (7-1) in the axial direction inside be provided with it is anti- Turn planet gear pad mating spherical surfaces face (7-3)；The integral type driven bevel gear mating surface (7-8) and axle shaft gear gasket Several second lightening holes (7-6) are along the circumferential direction also evenly distributed on shell between mating surface (7-4), for making gear Lubricating oil can smoothly enter into inside inter-wheel differential assembly, reinforce lubrication；It is circumferentially square between second lightening hole (7-6) To reinforcing rib (7-7) is provided with, for enhancing the rigidity of differential right casing (7).

5. differential assembly between a kind of novel commercial wheel as described in claim 1, which is characterized in that the anti-rotation planet tooth Several oil-stored holes (8-1) have been distributed uniformly and circumferentially on wheel gasket (8), if for storing dry lube in pit slot, What is be arranged at the center of the anti-rotation planet gear pad (8) has an anti-rotation cross shaft mounting hole (8-3), anti-rotation cross axle Two side edges in mounting hole (8-3) diametrically outside are provided with anti-rotation and put down flat (8-2), the anti-rotation put down flat (8-2) with Long planet gear axis anti-rotation puts down flat (10-1-1) and short planet gear axis anti-rotation is put down flat (10-2-1) and matched；Pass through anti-rotation planet The anti-rotation being arranged on cog spacers (8) equals the long planet gear axis anti-rotation being arranged on flat (8-2) and long planet gear axis (10-1) It equals the short planet gear axis anti-rotation being arranged on flat (10-1-1) and short planet gear axis (10-2) and puts down flat (10-2-1) and match just The restrictions planetary gear gasket (8) in differential assembly operation process may be implemented circumferentially to turn along anti-rotation cross assemble (10) It is dynamic, to play the role of anti-rotation, to eliminate the anti-rotation planet gear pad mating spherical surfaces face being arranged on differential right casing (7) The problem of (7-3) serious wear.

6. differential assembly between a kind of novel commercial wheel as described in claim 1, which is characterized in that the anti-rotation cross axle Assembly (10) is made of a long planet gear axis (10-1) and two short planet gear axis (10-2), the long planet gear What is be arranged on the left and right sides lower planes of axis (10-1) has long planet gear axis anti-rotation to put down flat (10-1-1), the long planet tooth Short planet gear axis installation keyway (10-1-2) that there are two the intermediate position settings of wheel shaft (10-1)；The short planet gear axis What is be arranged on the right side lower planes of (10-2) has short planet gear axis anti-rotation to put down flat (10-2-1), short planet gear axis (10-2) Left end on be provided with short planet gear axis installation key (10-2-2)；The short planet gear axis installs keyway (10-1-2) Anti-rotation cross assemble (10) are combined into short planet gear axis installation key (10-2-2) matching.

7. the assembly method of differential assembly between a kind of novel commercial wheel as described in claim 1, which is characterized in that including Following steps:

A, differential bearing (5) is pressed into integral type driven bevel gear (1) and differential mechanism respectively using special tooling in advance In the differential bearing mating surface (1-3) and differential bearing mounting surface (7-5) being arranged on right shell (7), and guarantee to be press-fit into place；

B, the bottom for the differential right casing (7) for being pressed differential bearing is placed in downward on plate, the bottom be with The side of differential bearing mounting surface (7-5)；

C, axle shaft gear gasket (4) is placed in differential right casing (7), is made in axle shaft gear gasket (4) and differential right casing The axle shaft gear gasket mating surface (7-4) of setting matches, and places into axle shaft gear (3)；

D, the half of long planet gear axis (10-1) is packed into the anti-rotation cross shaft mounting hole (7-1) being arranged on differential mechanism right (7) In；Anti-rotation planet gear pad (8) is fitted into long planet gear axis (10-1), and is packed into planetary gear (9)；In its correspondence one Side is equally sequentially loaded into planetary gear (9), anti-rotation planet gear pad (8)；Long planet gear axis (10-1) is completely assembled to Position, and guarantee in the short planet gear axis being arranged on long planet gear axis installation keyway (10-1-2) and differential right casing (7) Heart line is parallel；

E, the half of short planet gear axis (10-2) is packed into the anti-rotation cross shaft mounting hole (7- being arranged on differential right casing (7) 1) in；Anti-rotation planet gear pad (8) is fitted into short planet gear axis (10-2), and is packed into planetary gear (9)；By short planet Gear shaft (10-2) is fully pushed against the short planet gear axis installation key (10-2- for making to be arranged on short planet gear axis (10-2) in place 2) be arranged on long planet gear axis (10-1) short planet gear axis installation keyway (10-1-2) it is fully mated；With identical dress Method of completing the square, the short planet gear axis (10-2), anti-rotation planet gear pad (8), planetary gear (9) for being corresponded to side are assembled to Position；

F, elastic cylindrical pin (11) is installed to the elastic cylindrical pin mounting hole being arranged on differential right casing (7) using special tooling In (7-2), and guarantee its assembly in place；Differential right casing assembly (2) assembly is completed；

G, on the differential right casing assembly (2) assembled, axle shaft gear (3), axle shaft gear gasket (4), one are sequentially placed into Body formula driven bevel gear (1), and guarantee the link bolt hole (1-10) being arranged on integral type driven bevel gear (1) and differential The connection threaded hole (7-9) being arranged on the right shell of device (7) aligns；

H, it is packed into connection bolt (6), and connection bolt (6) is tightened with prescribed torque.