CN212690740U - Differential mechanism shell structure of inserted block type web - Google Patents

Abstract

The utility model discloses a differential shell structure of an insert type web plate, which comprises a differential shell and a main reduction gear, wherein an annular flange which is integrally formed with the differential shell is arranged at the periphery of the differential shell connected with the main reduction gear, and an annular caulking groove is arranged at the peripheral surface of the annular flange; the annular web plate is different from the differential shell in material, the inner ring part of the annular web plate is positioned in the annular caulking groove, the outer ring part of the annular web plate is exposed out of the annular caulking groove, and the differential shell has the advantages that: the web plate embedded into the differential shell and the main reduction gear are made of the same material, and a simple, reliable and mature welding process is provided, so that the differential shell embedded into the web plate can be reliably welded and connected with the main reduction gear through the web plate; after the threaded holes are machined in the embedded web plate, the requirement of high-strength bolt connection (the bolt pretightening force is improved) can be met, and the purposes of reducing the number of bolts and reducing the quality of a differential assembly are achieved.

Description

Differential mechanism shell structure of inserted block type web

Technical Field

The utility model relates to a differential mechanism, concretely relates to differential mechanism shell structure of abaculus formula web belongs to automotive transmission technical field.

Background

The differential includes, in addition to components such as side gears, planetary gears, and planetary gear shafts, a case for housing and mounting these components, and a final reduction gear fixedly connected to the case at an outer periphery of one end of the case.

The existing differential has two connection modes of a shell and a main reduction gear, the shell and the main reduction gear are usually connected through a plurality of bolts, and the shell and the main reduction gear are rarely connected in a welding mode.

The shell is generally made of nodular cast iron or die-casting aluminum with good casting performance and is formed by casting or die-casting. The main reduction gear is made of a low-carbon alloy material with higher hardness, and due to the fact that the mechanical properties of two different materials are different greatly, when the main reduction gear is connected through bolts, the pre-tightening force of the bearing bolts with relatively low hardness cannot meet the requirements of high-strength bolts, the main reduction gear is reliably installed only by increasing the number of the bolts, the quality of a differential assembly is increased inevitably, and the machining and assembling cost is increased. When the differential gear assembly is connected by adopting a welding process, although the arrangement of a plurality of bolts is omitted, the quality of the differential gear assembly is reduced, the welding process is complex due to the welding of different materials, the welding defect is easy to occur, and the greater quality hidden danger exists.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: when dissimilar material welding is performed between the differential case and the main reduction gear which are made of different materials, the welding quality is unstable; when the bolt connection is implemented, a plurality of connecting bolts are needed, which causes the problems of increased assembly mass and increased processing and assembling cost.

To the above problem, the utility model provides a technical scheme is:

a differential case structure with an insert block type web plate comprises a differential case and a main reduction gear, wherein an annular flange which is integrally formed with the differential case is arranged on the periphery of the differential case, which is connected with the main reduction gear, and an annular caulking groove is arranged on the peripheral surface of the annular flange; the material of the annular web is different from that of the annular web of the differential case, the inner ring part of the annular web is positioned in the annular caulking groove, and the outer ring part of the annular web is exposed out of the annular caulking groove.

Furthermore, the groove bottom surface of the annular caulking groove is a first concave-convex surface, the inner circumferential surface of the annular web is a second concave-convex surface matched with the first concave-convex surface, and the first concave-convex surface and the second concave-convex surface form a matching structure.

Furthermore, the main reduction gear is provided with a rim ring, and a spigot matching structure is arranged between the inner peripheral surface of the rim ring and the outer peripheral surface of the annular web plate.

Furthermore, a first chamfer surface is arranged between the peripheral surface of the annular compound plate and the end surface of one side of the annular compound plate; correspondingly, a second chamfer surface is arranged between the inner peripheral surface of the rim and the side surface on one side, and the first chamfer surface of the annular copying plate and the second chamfer surface of the rim form a V-shaped welding groove.

Furthermore, a spigot edge on one side of the inner periphery of the rim ring extends towards the circle center to form an annular bolt fixedly connected with the rim plate, the bolt fixedly connected with the rim plate is provided with an axial thread passing bolt hole, correspondingly, the web plate is provided with an internal thread screw hole, the thread passing bolt hole in the bolt fixedly connected with the rim plate is communicated with the web plate screw hole, and the annular compound plate is connected with the bolt fixedly connected with the rim plate by screwing the bolt into the screw hole through the thread passing bolt hole.

Further, a third chamfer surface and a fourth chamfer surface are respectively formed between the outer peripheral surface and the two side surfaces of the annular flange.

The utility model has the advantages that:

1. the web plate embedded into the differential shell and the main reduction gear are made of the same material, and a simple, reliable and mature welding process is provided, so that the differential shell embedded into the web plate can be reliably welded and connected with the main reduction gear through the web plate. Therefore, a feasible guarantee is provided for eliminating bolt connection, saving material cost and labor cost and realizing light weight of products.

2. When the differential shell embedded into the web plate is in bolted connection with the main reduction gear, the requirement of high-strength bolted connection (improvement of bolt pretightening force) can be met after the threaded hole is processed on the embedded web plate, and the purposes of reducing the number of bolts and reducing the quality of a differential assembly are achieved.

Drawings

FIG. 1 is a schematic illustration of a prior art bolted connection of a differential case to a final drive gear;

FIG. 2 is a schematic view of a prior art welded connection of a differential case to a final reduction gear;

FIG. 3 is a schematic view of an embodiment of an annular groove in the annular flange and the annular flange of the differential case;

FIG. 4 is a schematic structural view of the annular web in the annular caulking groove according to one embodiment;

FIG. 5 is a schematic view of a first concave-convex surface on the bottom surface of the annular caulking groove according to the first embodiment;

FIG. 6 is a schematic view of a second concave-convex surface on the inner circumferential surface of the annular web according to the first embodiment;

FIG. 7 is a view taken along line A of FIG. 6;

FIG. 8 is a schematic view illustrating the fitting and welding of the inner peripheral surface of the rim and the spigot of the outer peripheral surface of the annular web according to one embodiment;

FIG. 9 is a schematic view of a welding groove formed at the joint of the inner peripheral surface of the rim and the spigot of the outer peripheral surface of the annular web according to the first embodiment;

FIG. 10 is a schematic view of two sides of the annular flange being chamfered to form a third chamfer surface and a fourth chamfer surface according to the first embodiment;

FIG. 11 is an exploded view of the inner periphery of the second rim and the spigot of the outer periphery of the annular web in the embodiment connected by bolts.

In the figure: 1. a differential housing; 2. a main reduction gear; 3. a rim ring; 4. an integral web; 5. an annular web; 6. an annular flange; 7. an annular caulking groove; 8. the concave-convex surface I; 9. a concave-convex surface II; 10. chamfering a first surface; 11. a second chamfer surface; 12. welding a groove; 13. chamfering the third surface; 14. chamfering four sides; 15. the bolt is fixedly connected with the rim plate; 16. a wire passing bolt hole; 17. a screw hole; 18. and (4) bolts.

Detailed Description

For a clearer understanding of the present invention, the two prior art methods of connecting the differential case 1 and the main reduction gear 2 will be briefly described as follows:

bolt connection: as shown in fig. 1, the rim 3 of the main reduction gear 2 is connected with the integral web 4 of the differential case 1 through bolts 18, and since the integral web 4 (which is made of the same material as the differential case 1) is different from the material of the rim 3, the mechanical property of the material of the integral web 4 is weak, and the pretightening force provided by the screws of the screw holes on the web is also weak, the requirement of fastening connection between the main reduction gear 2 and the differential case 1 can be met by a larger number of bolts.

Welding connection: as shown in fig. 2, the rim 3 of the main reduction gear is connected with the integral web 4 of the differential case 1 by welding, and the rim 3 and the integral web 4 are welded together completely as seen in the figure, but actually, because the rim 3 and the integral web 4 are not made of the same material, the welding process is complicated, the welding process is time-consuming and labor-consuming, and the welding quality is unstable.

The invention is further described below with reference to the following examples and figures:

example one

As shown in fig. 3 and 4, the differential case structure of the insert block type web comprises a differential case 1 and a main reduction gear 2, wherein an annular flange 6 which is integrally formed with the differential case 1 is arranged on the periphery of the differential case 1 connected with the main reduction gear 2, and an annular caulking groove 7 is arranged on the peripheral surface of the annular flange 6; the material of the annular web 5 is different from that of the annular web 5 of the differential case 1, the inner ring part of the annular web 5 is positioned in the annular caulking groove 7, and the outer ring part of the annular web is exposed out of the annular caulking groove 7. The annular flange 6 and the annular caulking groove 7 are integrally formed at one time during casting of the differential case 1, moreover, the annular web 5 is placed into a casting mold in advance during casting of the differential case 1, after casting or die casting, the annular web 5 is embedded into the annular caulking groove 7 of the annular flange 6, although the annular web 5 and the differential case 1 are made of different materials, the melting point of the material of the annular web 5 is higher than that of the material of the annular flange 6, and the annular web 5 cannot be connected with the annular flange 6 in a melting way, after a blank is cooled and formed, the annular web 5 can be tightly clamped by the annular caulking groove 7. Here, the embedded annular web 5 is made of the same material as the main reduction gear 2 and the rim 3 thereof. When the annular web 5 and the rim ring 3 are connected by the bolts, the annular web 5 is made of high-hardness material, and the screw pretightening force of the screw hole formed in the annular web is large, so that the main reduction gear 2 and the differential case 1 can be fastened and connected by fewer bolts. When the annular web plate 5 is connected with the rim 3 by welding, the annular web plate 5 and the rim 3 are made of the same material, so that the welding is very simple and the welding quality is stable and reliable.

Further improvements are as follows.

As shown in fig. 5-7, the bottom surface of the annular caulking groove 7 is a first concave-convex surface 8, the inner circumferential surface of the annular web 5 is a second concave-convex surface 9 matched with the first concave-convex surface 8, and the first concave-convex surface 8 and the second concave-convex surface 9 form a matching structure. This arrangement is such that the annular web 5 slips in the annular groove 7 when the retarder is loaded.

As shown in fig. 8, the main reduction gear 2 has a rim 3, and a spigot fitting structure is provided between an inner peripheral surface of the rim 3 and an outer peripheral surface of the annular web 5. The arrangement is convenient for positioning and limiting during butt joint.

As shown in fig. 9, a first chamfer surface 10 is arranged between the outer peripheral surface of the annular web 5 and the end surface of one side; correspondingly, a second chamfer surface 11 is arranged between the inner peripheral surface of the rim 3 and the side surface of one side, and a V-shaped welding groove 12 is formed between the first chamfer surface 10 of the annular copying plate and the second chamfer surface 11 of the rim 3. The arrangement is favorable for fusion welding to enter the welding groove 12, and the welding becomes smooth and the welding quality is good when welding connection is adopted.

As shown in fig. 10, a third chamfer surface 13 and a fourth chamfer surface 14 are formed between the outer peripheral surface and the side surfaces of the annular flange 6. The design is firstly to make the external shape surface not available before drinking naturally and smoothly, and secondly to save materials as much as possible, and to meet the light weight requirement of the product.

Example two

As shown in fig. 11, a differential case structure of an insert web differs from the first embodiment in that: the edge of a seam allowance at one side of the inner periphery of the rim ring 3 extends towards the circle center to form an annular bolt fixedly connected with the rim plate 15, the bolt fixedly connected with the rim plate 15 is provided with an axial thread passing bolt hole 16, correspondingly, the web plate is provided with an internal thread screw hole 17, the thread passing bolt hole 16 on the bolt fixedly connected with the rim plate 15 is communicated with a screw hole 17 of the annular web plate 5, and the annular compound plate is connected with the bolt fixedly connected with the rim plate 15 by screwing the bolt 18 into the screw hole 17 through the thread passing bolt hole 16. Obviously, this is an arrangement for a bolted connection.

The above embodiments are only for the purpose of more clearly describing the invention and should not be considered as limiting the scope of protection covered by the invention, any modification of the equivalent should be considered as falling within the scope of protection covered by the invention.

Claims (6)

1. A differential case structure of inserted block formula web, includes differential case (1) and final reduction gear (2), its characterized in that: an annular flange (6) which is integrally formed with the differential case (1) is arranged on the periphery of the differential case (1) connected with the main reduction gear (2), and an annular caulking groove (7) is arranged on the peripheral surface of the annular flange (6); the material of the annular web (5) is different from that of the annular web of the differential case (1), the inner ring part of the annular web (5) is positioned in the annular caulking groove (7), and the outer ring part of the annular web is exposed out of the annular caulking groove (7).

2. The differential case structure of an insert web of claim 1, wherein: the bottom surface of the annular caulking groove (7) is a first concave-convex surface (8), the inner circumferential surface of the annular web plate (5) is a second concave-convex surface (9) matched with the first concave-convex surface (8), and the first concave-convex surface (8) and the second concave-convex surface (9) form a matching structure.

3. The differential case structure of an insert web according to claim 2, wherein: the main reduction gear (2) is provided with a rim ring (3), and a spigot matching structure is arranged between the inner peripheral surface of the rim ring (3) and the outer peripheral surface of the annular web (5).

4. The differential case structure of an insert web according to claim 3, wherein: a first chamfer surface (10) is arranged between the outer peripheral surface of the annular web plate (5) and the end surface of one side; correspondingly, a second chamfer surface (11) is arranged between the inner peripheral surface of the rim (3) and the side surface on one side, and a V-shaped welding groove (12) is formed between the first chamfer surface (10) of the annular copying plate and the second chamfer surface (11) of the rim (3).

5. The differential case structure of an insert web according to claim 3, wherein: the bead edge of one side of the inner periphery of the rim ring (3) extends towards the circle center to form an annular bolt fixedly connected rim plate (15), the bolt fixedly connected rim plate (15) is provided with an axial thread passing bolt hole (16), correspondingly, the web plate is provided with an internal threaded screw hole (17), the thread passing bolt hole (16) in the bolt fixedly connected rim plate (15) is communicated with the web plate () screw hole (17), and the annular compound plate is connected with the bolt fixedly connected rim plate (15) by screwing the bolt (18) into the screw hole (17) through the thread passing bolt hole (16).

6. The differential case structure of an insert web according to any one of claims 1 to 5, wherein: and a third chamfer surface (13) and a fourth chamfer surface (14) are respectively formed between the outer peripheral surface and the side surfaces at the two sides of the annular flange (6).

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