CN209164521U - A kind of single axle limited-slip differential for small vehicle - Google Patents

Abstract

The utility model discloses a single-shaft type limited-slip differential gear for small vehicles, which comprises a casing, a flange cover, a side gear and a planetary gear. There is a shaft hole, the shaft hole is penetrated by the center of the hole and the shaft rod is installed, the two ends of the shaft rod are provided with positioning pin holes, the housing is provided with positioning bolt holes, the positioning bolt holes are installed with positioning bolts, and the positioning bolts The shaft rod and the casing are connected and positioned through the positioning pin holes, a thrust washer is arranged between the half shaft gear and the casing, the outer ring of the thrust washer is provided with an arc protrusion, and the thrust washer is provided with a thrust washer. A gear gasket is arranged between the oil storage pocket and the oil groove, the planetary gear and the casing, the inner ring of the gear gasket is provided with a flanging, and the inner concave spherical surface of the gear gasket is provided with a circular pit. The utility model can directly process the shaft hole to ensure the concentricity, without the need for additional parts, the weight is light, the speed-increasing performance is improved, the wear of the push gasket is prevented, and the lubrication and wear resistance of the gear gasket is enhanced.

Description

A single-axle limited-slip differential for small vehicles

technical field

The utility model belongs to the technical field of differential gears of small vehicles, in particular to a single-shaft type limited-slip differential gear used for small vehicles.

Background technique

At present, the differentials commonly used in small cars and large cars are generally cross shafts, and the cross shafts are all integral. Previously, the housing of the differential was divided into two half-shells, and the shafts were machined on the half-shells. However, it is difficult to ensure the concentricity of the two shaft hole spherical surfaces processed in this way, and the machining accuracy of the shaft hole and the entire cross shaft is relatively high. The existing differential accounts for 11.5% of the weight of the gearbox. Especially for small cars, reducing the weight and occupying space is an important breakthrough direction today. It has an enhanced effect on the speed increase of the transmission. This lightweight design is now pursued.

Thrust washers are installed between the casings on the side gears that are usually used. The thrust washers lack a certain design. Due to the long-term bearing of large load shocks and poor lubrication adjustment, thrust washers are often caused. The gasket and the casing are sintered, which will cause the meshing between the gears to change, resulting in the failure of the differential. In addition, because the planetary gear will be equipped with a gear gasket, in practical applications, due to the long-term load, its The lubrication effect will also be poor, which will cause the gear spacers to wear or break, and even cause the gears in the casing to break, causing the entire differential and drive axle to collapse, so it is necessary to improve this defect.

Utility model content

In order to solve the problems raised in the above background art. The utility model provides a single-axle limited-slip differential for small vehicles, which has the advantages of integrated casing, direct machining of shaft holes to ensure concentricity, guarantee of machining accuracy, light weight, enhanced speed-up effect, and improved stopping power. The wear resistance of the push gasket, reducing the wear of the gear gasket on the casing and gears, and ensuring the normal operation of the differential.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a single-shaft limited-slip differential for small vehicles, comprising a housing, a flange cover body, side gears and planetary gears, the flange cover The body is fixed on the casing, and it is characterized in that: the casing is integrally formed, the casing is provided with shaft holes at the top and the bottom, and the shaft holes at the top and the bottom are connected with the shaft center of the holes and are connected to each other. A shaft rod is installed, both ends of the shaft rod are provided with positioning pin holes, the housing is provided with positioning bolt holes, and positioning bolts are installed on the positioning bolt holes, and the positioning bolts are connected to each other through the positioning pin holes. The shaft and the casing are connected and positioned, the planetary gears are sleeved on both ends of the shaft, the planetary gears and the side gears are in meshing fit, and a thrust washer is arranged between the side gears and the casing , the outer ring of the thrust washer is provided with a circular arc protrusion, the thrust washer is provided with a number of oil storage pockets and oil grooves, the number of the oil grooves is four, and the space between the planetary gear and the housing is A gear washer is arranged between the gear washer, the inner ring of the gear washer is provided with a concave flange, and the inner concave spherical surface of the gear washer is provided with a number of circular pits.

Preferably, the outer wall of the casing is annularly provided with oil circulation holes for the circulation of lubricating oil, the circulation oil holes are communicated with the inner cavity of the casing, the number of the circulation oil holes is four, and the oil circulation holes are located in the casing. Evenly distributed.

Preferably, the left side of the flange cover is provided with an external tooth meshing guide structure and an annular groove body, a positioning hole is provided in the external tooth meshing guide structure, and the side gear is inserted in the positioning hole, so An adhesive sealing ring is arranged between the side gear and the external tooth meshing guide structure.

Preferably, the surface of the shaft rod is provided with a helical lubricating oil groove.

Preferably, the circular recess is in a circular groove structure, the diameter of the circular recess is 3.00 mm, and the depth of the circular recess is 0.01-5.00 mm.

After the above structure is adopted, the advantages of the present utility model compared with the prior art are: the utility model has a reasonable and ingenious structure, the casing is integrated, and the shaft hole can be directly machined to ensure concentricity and processing accuracy; a single shaft rod is used. , The shaft and the casing are connected and positioned by the positioning bolts through the positioning pin holes, and the planetary gears are sleeved at both ends of the shaft. Improve the speed-up performance of the transmission; a number of oil storage pockets and oil grooves are opened on the thrust washer to prevent the initial wear of the thrust washer, improve the lubrication conditions of the differential, and the arc bulge is easy to cooperate with; The discs are arranged with circular pits, which can increase the amount of lubricating oil left between the gear washer and the planetary gear, and enhance the lubricating effect and wear resistance of the gear washer.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:

Fig. 1 is the internal structure split schematic diagram of the utility model shell;

Fig. 2 is the structural representation of the thrust washer of the utility model;

Fig. 3 is the structural representation of the gear washer of the utility model;

Fig. 4 is the structural representation of the flange cover of the utility model;

In the figure: 10, housing; 11, flange cover; 12, side gear; 13, planetary gear; 14, shaft hole; 15, shaft rod; 16, positioning pin hole; 17, positioning bolt hole; 19, Locating bolt; 191, head; 192, rod; 20, thrust washer; 21, arc protrusion; 22, oil reservoir; 23, oil groove; 24, gear washer; 25, flange; 26, Circular pit; 27, oil circulation hole; 28, external tooth meshing guide structure; 29, annular groove body; 30, positioning hole; 31, adhesive sealing ring; 32, helical lubricating oil groove.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Example

1-4, a single axle limited slip differential for small vehicles, including a housing 10, a flange cover 11, a side gear 12 and a planetary gear 13, the flange cover 11 is fixed on the On the casing 10, the casing 10 is integrally arranged, and the casing 10 is provided with a shaft hole 14 at the top and the bottom. Both ends of the rod 15 are provided with positioning pin holes 16, the housing 10 is provided with positioning bolt holes 1718, and the positioning bolt holes 17 are installed with positioning bolts 19. The positioning bolts 19 pass through the positioning pin holes 16 to the shaft 15 and the housing. 10 is connected and positioned, the planetary gear 13 is sleeved on both ends of the shaft rod 15, the planetary gear 13 and the side gear 12 are meshed and matched, and a thrust washer 20 is arranged between the side gear 12 and the housing 10, and the thrust The outer ring of the gasket 20 is provided with a circular arc protrusion 21 , and the thrust gasket 20 is provided with a number of oil storage pockets 22 and oil grooves 23 , and the number of oil grooves 23 is four. The gear washer 24, the inner ring of the gear washer 24 is provided with a concave flange 25, and the concave spherical surface of the gear washer 24 is provided with a number of circular dimples 26.

In this embodiment, the overall structure is reasonable and ingenious, the housing 10 is integrated, and the shaft hole can be directly machined to ensure concentricity and processing accuracy; a single shaft rod 15 is used, and the positioning bolt 19 passes through the positioning pin hole 16 to the shaft rod. 15 and the housing 10 are connected and positioned, and the planetary gears 13 are sleeved on both ends of the shaft 15. This structure does not require additional parts, is simple, practical, lightweight, suitable for small cars, and can well improve the speed-up performance of the transmission; The thrust washer 20 is provided with a number of oil storage pockets 22 and oil grooves 23 to prevent the initial wear of the thrust washer 20 and improve the lubricating conditions of the differential, and the arc protrusion 21 is convenient to cooperate with; Arranging the circular dimples 26 can increase the amount of lubricating oil left between the gear washer 24 and the planetary gear 13, enhance the lubricating effect and wear resistance of the gear washer 24, and ensure the normal operation of the differential.

Specifically, the positioning bolt 19 is a hexagon socket head bolt. The positioning bolt 19 includes a head 191 and a stem 192. The outer surface of the head 191 is provided with an external thread that is screwed with the positioning bolt hole 17. In the bolt hole 17, the shaft rod 15 and the housing 10 are connected and positioned through the positioning pin hole 16, the installation accuracy is high, and errors are not easy to occur.

Further, the outer wall of the casing 10 is annularly provided with oil circulation holes 27 for the circulation of lubricating oil, and the circulation oil holes 27 are communicated with the inner cavity of the casing 10. Evenly distributed.

In this embodiment, the oil circulation hole 27 can ensure that the lubricating oil can smoothly enter the casing 10 and ensure the use of the differential. The size of the hole can be opened according to specific actual use requirements.

Further, the left side of the flange cover body 11 is provided with an external tooth meshing guide structure 28 and an annular groove body 29, the external tooth meshing guide structure 28 is provided with a positioning hole 30, and the side gear 12 is inserted in the positioning hole 30, An adhesive sealing ring 31 is provided between the side gear 12 and the external tooth meshing guide structure 28 .

In this embodiment, the adhesive sealing ring 31 has good connection sealing performance, and has protection for the side gear 12 .

Specifically, the external tooth meshing guide structure 28 of the flange cover body 11 can cooperate with the installation of the self-locking limiting mechanism, without the use of a toothed sleeve and a differential lock, the structure is simple, the related accessories are few, the installation is simple, the transmission efficiency is high, and the It reduces weight and space, is very lightweight, has good stability, and meets the national environmental protection requirements for energy conservation and emission reduction. When encountering various special circumstances such as ice and snow roads, muddy roads, and deep pits, the self-locking limit is used. The mechanism is forced to self-lock, and the stability is high, and the driving torque of the driving wheel is increased to improve the passing performance of the vehicle.

Further, the surface of the shaft rod 15 is provided with a helical lubricating oil groove 32 .

In this embodiment, the helical lubricating oil grooves 32 are spirally arranged on the shaft surface. When the planetary gear 13 rotates, a certain lubricating effect is performed by the helical lubricating oil grooves 32, and the use effect is good.

Further, the circular recess 26 has a circular groove structure, the diameter of the circular recess 26 is 3.00 mm, and the depth of the circular recess 26 is 0.01-5.00 mm.

In this embodiment, the structure of the circular recess 26 achieves an excellent effect, and can accumulate lubricating oil to reduce friction. According to the structure of the internal assembly of the housing 10, the diameter of the circular recess 26 is preferably 3 mm, and the depth of the circular recess 26 is preferably 3 mm. 0.01-5.00mm, this size is suitable for this type of differential.

Finally, it should be noted that the above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. , it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (5)

1. A single-axle limited-slip differential for a small vehicle, comprising a housing (10), a flange cover (11), a side gear (12) and a planetary gear (13), the flange The cover body (11) is fixed on the casing (10), and is characterized in that: the casing (10) is integrally formed, and the casing (10) is provided with shaft holes (14) at the top and the bottom, so that the The shaft hole (14) at the top and the shaft hole (14) at the bottom pass through the shaft center of the hole and a shaft rod (15) is installed, and both ends of the shaft rod (15) are provided with positioning pin holes (16), The housing (10) is provided with a positioning bolt hole (17), a positioning bolt (19) is mounted on the positioning bolt hole (17), and the positioning bolt (19) is aligned with the shaft through the positioning pin hole (16). The rod (15) and the housing (10) are connected and positioned, the planetary gears (13) are sleeved on both ends of the shaft rod (15), and the planetary gears (13) and the side gears (12) are in meshing fit , a thrust washer (20) is arranged between the side gear (12) and the casing (10), and the outer ring of the thrust washer (20) is provided with a circular arc protrusion (21), so The thrust washer (20) is provided with a number of oil storage pockets (22) and oil grooves (23). A gear washer (24) is arranged between the gear washer (24), the inner ring of the gear washer (24) is provided with a concave flange (25), and the inner concave spherical surface of the gear washer (24) is provided with a number of circular pits (26). 2 . The single-axle limited-slip differential for small vehicles according to claim 1 , wherein the outer wall of the housing ( 10 ) is annularly provided with oil circulation holes for the circulation of lubricating oil. 3 . (27), the oil circulation holes (27) communicate with the inner cavity of the casing (10), the number of the oil circulation holes (27) is four, and the oil circulation holes (27) are evenly distributed in the casing (10). 3. A single-axle limited-slip differential for small vehicles according to claim 1, characterized in that: the left side of the flange cover body (11) is provided with an external tooth meshing guide structure (28) ) and an annular groove body (29), a positioning hole (30) is provided in the outer tooth meshing guide structure (28), and the half shaft gear (12) is inserted into the positioning hole (30), and the half shaft An adhesive sealing ring (31) is arranged between the gear (12) and the external tooth meshing guide structure (28). 4 . The single-axle limited-slip differential for small vehicles according to claim 1 , wherein the surface of the shaft rod ( 15 ) is provided with a helical lubricating oil groove ( 32 ). 5 . 5. A single-axle limited-slip differential for small vehicles according to claim 1, characterized in that: the circular recess (26) is in the form of a circular groove structure, and the circular recess (26) ) is 3.00mm in diameter, and the depth of the circular recess (26) is 0.01-5.00mm.