CN201871919U - Adapter device for synchronous butt of main cone nut and flange of car drive axle assembly - Google Patents

Abstract

The utility model relates to an adapter device for synchronous butt of a main cone nut and a flange of a car drive axle assembly, which comprises an inner adapter barrel, a split gland and an outer adapter barrel, wherein the inner adapter barrel and the outer adapter barrel are both provided with inner bores; the inner bore of the inner adapter barrel is in a shape meshed with the outer diameter of the main cone nut; the outer circumferential surface of the inner adapter barrel is provided with a cylindrical shaft shoulder in the middle; the outer circumference of the cylindrical shaft shoulder is matched with the inner circumference of the outer adapter barrel so that the inner adapter barrel is concentrically embedded in the outer adapter barrel; the split gland has a semi-circle step structure; and the split gland is fixedly connected with the outer adapter barrel to prevent the outer adapter barrel from falling off from the inner adapter barrel and enable the outer adapter barrel to rotate relatively to the inner adapter barrel. The benefit of the adapter device is as follows: a screwing manner by rotating the main cone nut has better accurate control effect and better working efficiency than the need of fixing a main cone flange in the prior art.

Description

Adapter device for synchronous docking of main cone nut and flange of automobile drive axle assembly

technical field

The utility model belongs to the technical field of automobiles, in particular to auxiliary equipment for assembly of drive axle assemblies.

Background technique

The car drive axle assembly (usually the rear axle, and the four-wheel drive vehicle also includes the front axle) is the last assembly. The drive axle assembly is mainly composed of drive axle housing, final drive, differential and half shaft. The main reducer in the drive axle assembly bears large axial and radial impact loads, and its basic function is to transmit the power input from the transmission assembly to the driving wheels at last. The main reducer, also known as the main drive, is composed of a pair of spiral bevel gear assemblies, which are the driving bevel gear assembly and the driven bevel gear assembly. Its function is to reduce the speed, increase the torque, and change the direction of the rotation axis to ensure The car has plenty of traction and the right speed. Among them, the active bevel gear assembly (hereinafter referred to as the main bevel assembly) refers to the supporting shaft system of the active bevel gear in the main reducer of the automobile. The active bevel gear and its supporting shaft system are integrated to form the main bevel assembly. A pair of single row tapered roller bearings (hereinafter referred to as the bearing) is distributed on one side of the gear, and the active bevel gear is suspended outside the bearing and is supported by a cantilever.

As shown in Figure 1 is the specific structure of the main cone assembly, the main cone assembly includes a driving bevel gear 1, a pair of bearings 21, a main cone assembly shell 3, a main cone flange 4 and a main cone nut 5, and one end of the driving bevel gear 1 is The other end of the gear 11 is a shaft 12, and a pair of bearings 21 are set on the shaft 12. The outer ring of the single row tapered roller bearing 21 is covered with the main cone assembly shell 3, so the driving bevel gear 1 can rotate relative to the main cone assembly shell 3; the main cone The flange 4 is set on the shaft 12 through a spline connection and one end is in contact with the bearing 21. The main cone nut 5 is set on the shaft 12 through a threaded connection and one end is in contact with the main cone flange 4. The above-mentioned main cone nut 5 needs hundreds of Nm torque is tightened to ensure sufficient connection stiffness between the inner ring of the bearing 21 and the shaft 12 of the driving bevel gear 1 .

In the assembly process of the drive axle assembly of the automobile, the tightening of the main cone nut 5 of the main cone assembly is very important. It is used to press the main cone flange 4 and each end surface of the inner ring of the bearing 21 to prevent oil leakage, and to give the main cone The bearing 21 of the cone assembly provides a certain value of pretightening force to ensure the normal operation of the bearing, neither burning nor axial movement. Proper pretightening can improve the reliability and tightness of the connection, and can also improve the fatigue strength. Insufficient pre-tightening force often affects the tightness, rigidity and anti-loosening performance of the connection; however, if the pre-tightening force is too large, it will break when it is tightened or slightly overloaded during work. Therefore, it is necessary to apply a fixed value torque to the main cone nut 5 during assembly to realize the pre-tightening of the bearing.

Due to the special requirements for the pre-tightening of the main cone nut 5 of the main cone assembly, for the tightening of the main cone nut 5, the automatic tightening machines at home and abroad now fix the main cone flange 4 and rotate the main cone nut 5 for tightening. The method cannot precisely control the torque and the rotation angle at the same time, and the efficiency is low.

Due to the requirements of the production efficiency of the enterprise, in the process of tightening the main cone nut 5, it becomes a technical point whether the simultaneous fast docking of the main cone nut 5 and the main cone flange 4 can be realized. The main cone nut 5 usually adopts an outer hexagonal structure, and the shaft 12 needs to be rotated at a certain angle to dock with the main cone nut 5; and due to the influence of the processing technology of the parts, each part will have some slight differences in size, which will Affecting the centering of the main cone nut 5 and the shaft 12, at this time the butt joint problem between the main cone nut 5 and the shaft 12 is serious, which will seriously affect the assembly efficiency of the rear axle of the automobile.

Utility model content

The purpose of the utility model is to improve the assembly efficiency of the main cone nut of the main cone assembly of the automobile rear axle assembly, and proposes an adapter device for the synchronous docking of the main cone nut and the flange of the automobile drive axle assembly.

In order to achieve the above object, the technical solution of the utility model is: the adapter device for the synchronous docking of the main cone nut of the automobile drive axle assembly and the flange, including the inner cylinder of the adapter, the split gland and the outer cylinder of the adapter; Both the inner cylinder of the adapter and the outer cylinder of the adapter have inner holes, and the inner hole of the inner cylinder of the adapter has a shape that engages with the outer diameter of the main cone nut; the middle part of the outer peripheral surface of the inner cylinder of the adapter has a cylindrical shoulder , the outer circumference of the cylindrical shoulder matches the inner circumference of the outer cylinder of the adapter so that the inner cylinder of the adapter is concentrically embedded in the outer cylinder of the adapter, the split gland is a semicircular stepped structure, and the split gland The inner edge of the inner edge of the adapter is against the cylindrical shoulder of the inner cylinder of the adapter. A pair of split glands form an annular stepped structure, and the annular stepped structure formed by a pair of split glands can be sleeved on the cylinder of the inner cylinder of the adapter. The outer surface above the shaft shoulder is partially embedded in the outer cylinder of the adapter. After the split gland and the outer cylinder of the adapter are fixedly connected, it is used to prevent the outer cylinder of the adapter from falling off from the inner cylinder of the adapter and to make the outer cylinder of the adapter relatively The inner cylinder of the adapter rotates; the inner cylinder of the adapter and the outer circumference of the outer cylinder of the adapter respectively have a pair of protrusions for respectively docking and nesting with the notches on the inner sleeve and the outer sleeve of the automatic tightening machine; The protrusion of the outer cylinder of the adapter has a pair of pin holes for fixed connection with the pin holes on the main cone flange through the external bolts.

The inner hole of the inner barrel of the adapter is a hexagonal polygonal structure matching the outer diameter of the main taper nut.

The inner hole of the inner cylinder of the adapter is a twelve-cornered polygonal structure composed of two hexagonal polygonal structures, and the hexagonal polygonal shape matches the outer diameter of the main taper nut.

The beneficial effects of the utility model are: after the device of the utility model is assembled, during use, the outer cylinder of the adapter is aligned with the pin hole inserted into the main cone flange with a bolt, and the inner hole at the lower end of the inner cylinder of the adapter is caught The main cone nut realizes the docking of the device of the utility model and the main cone assembly. The two sector-shaped notches of the outer sleeve of the automatic tightening machine cover the two sector-shaped protrusions of the outer cylinder of the adapter, and the two sector-shaped recesses of the inner sleeve The mouth covers the two fan-shaped protrusions of the inner cylinder of the adapter, so that the outer sleeve of the automatic tightening machine rotates to drive the outer cylinder of the adapter device to rotate, and the inner sleeve of the automatic tightening machine brakes, and the tightening torque can be monitored at the same time and pre-tightening torque, the automatic tightening and proper pre-tightening of the main cone nut can be realized. Compared with the prior art that needs to fix the main cone flange and rotate the main cone nut for tightening, it has better precise control effect and work efficiency. At the same time, the structure of the utility model is compactly connected in the axial direction, and two split glands are used to lock the outer cylinder of the adapter to prevent the inner and outer sleeves from bouncing in the axial direction.

Description of drawings

Figure 1 is a structural diagram of the main cone assembly of an automobile rear axle assembly.

Fig. 2 is the assembly structure drawing of the present utility model.

Fig. 3 is a three-dimensional structure diagram of the inner cylinder of the adapter of the present invention.

Fig. 4 is a top structural view of the inner cylinder of the adapter of the present invention.

Fig. 5 is a three-dimensional structure diagram of the split gland of the present invention.

Fig. 6 is a three-dimensional structure diagram of the outer cylinder of the adapter of the present invention.

Explanation of reference signs: driving bevel gear 1, gear 11, bearing 21, shaft 12, main cone assembly shell 3, main cone flange 4, main cone nut 5, adapter inner cylinder 6, cylindrical shoulder 62, projection 61 , Split gland 7, inner edge 71, adapter outer cylinder 8, bump 81, shaft shoulder 82, latch 9.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

As shown in FIG. 2 , the adapter device in which the main taper nut of the automobile drive axle assembly is synchronously docked with the flange includes an adapter inner cylinder 6 , a split gland 7 and an adapter outer cylinder 8 .

As shown in Figures 3 and 4, the inner cylinder 6 of the adapter has an inner hole, and the inner hole of the inner cylinder 6 of the adapter is a polygonal structure composed of two hexagonal polygons, and the hexagonal polygon has the same outer diameter as the main cone nut 5. Matching, the middle part of the outer peripheral surface of the adapter inner cylinder 6 has a cylindrical shoulder 62, the outer circumference of the cylindrical shoulder 62 matches the inner circumference of the adapter outer cylinder 8 so that the adapter inner cylinder 6 is concentrically embedded The lower end of the outer circumference of the adapter outer cylinder 8 and the adapter inner cylinder 6 is a stepped structure. This structure is mainly to facilitate the engagement of the lower end of the adapter inner cylinder 6 with the main cone nut 5 more easily.

As shown in Figure 5, the split gland 7 is a semicircular stepped structure, the inner edge 71 of the split gland 7 is against the cylindrical shoulder 62 of the inner cylinder 6 of the adapter, and a pair of split glands 7 An annular stepped structure is formed. The annular stepped structure formed by a pair of split glands 7 can be set on the outer surface above the cylindrical shoulder 62 of the inner cylinder 6 of the adapter and partially embedded in the outer cylinder 8 of the adapter. After the type gland 7 is fixedly connected with the adapter outer cylinder 8, it is used to prevent the adapter outer cylinder 8 from falling off from the adapter inner cylinder 6 and to allow the adapter outer cylinder 8 to rotate relative to the adapter inner cylinder 6.

As shown in Figure 6, the adapter outer cylinder 8 also has an inner hole, and the inner circumference of the inner hole of the adapter outer cylinder 8 matches the outer circumference of the cylindrical shoulder 62 of the adapter inner cylinder 6, and the adapter outer cylinder The lower end of the inner hole of 8 has a shaft shoulder 82, and the lower end surface of the cylindrical shoulder 62 of the adapter inner cylinder 6 can cooperate with the upper end surface of the shaft shoulder 82 of the adapter outer cylinder 8 to prevent the adapter inner cylinder 6 from moving downward axially. move.

There are a pair of protrusions 81 on the outer circumference of the adapter inner cylinder 6 and the adapter outer cylinder 8 respectively, which are used to butt and nest with the matching notches on the inner sleeve and outer sleeve of the external automatic tightening machine respectively; The projection of the adapter outer cylinder 8 has a pair of pin holes 82 for fixed connection with the pin holes on the main cone flange 4 through the external latch 9 . In this embodiment, the protrusion 61 of the inner cylinder 6 of the adapter and the protrusion 81 of the outer cylinder 8 of the adapter are both 45° sector blocks, and the matching notches on the inner sleeve and the outer sleeve of the corresponding automatic tightening machine have the following shapes: The fan-shaped notch greater than or equal to 45°, preferably 90°, expanding the angular interval range of the notch is convenient for docking. When the notch is larger than the bumps 61, 81, it is easy to successfully dock with the bumps. After rotating a certain angle, the total It can drive the bumps to rotate together. In addition, the shapes of the bumps 61 and 81 can be set arbitrarily according to the needs. Therefore, the matching of the bumps and the concave blocks here has a wider meaning, as long as the inner surface of the external automatic tightening machine is ensured. The notches on the sleeve and the outer sleeve can be nested with the projections and drive the selection of the projections so that the notches match the projections.

In this embodiment, the split gland 7 and the adapter outer cylinder 8 are fixedly connected by bolts, and several through holes and screw holes are respectively arranged on the split gland 7 and the adapter outer cylinder 8. The top of the through hole of the gland 7 is provided with a counterbore, and then the fixed connection between the two can be realized through external bolts. Of course, other fixed connection methods such as interference fit connection may also be used.

The inner hole of the inner cylinder 6 of the above-mentioned adapter is two inner hexagonal polygons matching the outer diameter of the main cone nut 5 to form a twelve-cornered polygonal structure, which can quickly trap the hexagonal main cone nut 5, but also It can be considered to directly adopt a hexagonal polygonal structure that matches the outer diameter of the main cone nut 5, but it is not easy to achieve fast docking, and the meshing can be realized in both cases.

Those skilled in the art will appreciate that the embodiments described here are to help readers understand the principle of the utility model, and it should be understood that the protection scope of the utility model is not limited to such specific statements and examples. Those skilled in the art can make various other specific modifications and combinations based on the technical revelations disclosed in the utility model without departing from the essence of the utility model, and these variations and combinations are still within the protection scope of the utility model.

Claims (4)

1. automobile drive axle assembly main flare nut and the conversion adapter device that flange docks synchronously is characterized in that, described conversion adapter device comprises adapter inner core, dissection type gland and adapter urceolus; Described adapter inner core and adapter urceolus all have endoporus, and the endoporus of described adapter inner core has the shape that is meshed with the main flare nut external diameter; The middle part of the external peripheral surface of adapter inner core has a cylinder shaft shoulder, the excircle of the described cylinder shaft shoulder is complementary so that the concentric adapter urceolus that embeds of adapter inner core with the inner periphery of adapter urceolus, described dissection type gland is the semicircle terraced structure, the interior edge of dissection type gland props up the cylinder shaft shoulder place of adapter inner core, a pair of dissection type gland looping stepped ramp type structure, the ring-shaped step type structure that a pair of dissection type gland forms can be enclosed within on the outer surface of cylinder shaft shoulder top of adapter inner core and be partially submerged in the adapter urceolus, and the dissection type gland is fixedlyed connected the back and come off and can make the relative adapter inner core rotation of adapter urceolus from the adapter inner core in order to prevent the adapter urceolus with the adapter urceolus; Has a pair of projection on the excircle of adapter inner core and adapter urceolus respectively in order to nested with the inner sleeve of automatic screwing device respectively with the recess butt joint on the outer sleeve; The projection of described adapter urceolus have a pair of pin-and-hole in order to the main cone flange on pin-and-hole fixedly connected by outside latch.

2. automobile drive axle assembly main flare nut according to claim 1 and the conversion adapter device that flange docks synchronously is characterized in that, the endoporus of described adapter inner core is the six side's polygonized structures that are complementary with the main flare nut external diameter.

3. the conversion adapter device that automobile drive axle assembly main flare nut according to claim 1 and flange dock synchronously, it is characterized in that, the endoporus of described adapter inner core is the bihexagonal polygonized structure that two six side's polygonized structures are combined into, and described six side's polygons and main flare nut external diameter are complementary.

4. automobile drive axle assembly main flare nut according to claim 1 and the conversion adapter device that flange docks synchronously is characterized in that the projection of above-mentioned adapter urceolus is a secter pat.

Images