CN219795900U - Anti-drop back drive assembly - Google Patents

Abstract

An anti-drop rear-drive assembly. The problem that the anti-drop is difficult to guarantee under the condition that the length of a universal joint of an existing automobile rear drive assembly is shortened is mainly solved. The method is characterized in that: the first universal joint comprises a shell (21), one end of the intermediate shaft stretches into the shell and is provided with an star-shaped sleeve (41), the outer side of the star-shaped sleeve is provided with a retainer (42), the retainer is provided with a rolling ball (43), and a raceway (11) matched with the rolling ball is arranged in the shell; the inner wall of the shell is also provided with a bulge (12), and the bulge is arranged at the outer side of the retainer and used for preventing the retainer from falling out of the shell. The utility model provides an anti-falling rear-drive assembly, wherein a retainer cannot be separated from an inner ball cage under axial tension under the interference of anti-falling ribs, so that the retainer can be effectively prevented from falling from the ball cage when the assembly jolts, and the failure risk of the assembly is reduced.

Description

Anti-drop back drive assembly

Technical Field

The utility model relates to the field of automobile spare and accessory parts, in particular to an anti-falling back driving assembly.

Background

The high-end vehicle type commonly used rear wheel drive shaft assembly in the market not only requires to reduce the weight of products, but also requires to improve the driving comfort, and because the high-end vehicle type constant-speed drive shaft assembly in the market currently commonly uses a EBJ fixed type assembly combined with a VL joint type and a solid shaft.

The traditional VL section type has the advantages that the effect of preventing the retainer from falling off the ball cage is achieved by lengthening the length of the ball channel and enabling the steel ball to move under the limited stroke of the ball channel, and the product appearance volume is larger and the product weight is increased due to the fact that the length of the ball channel is lengthened.

Disclosure of Invention

In order to overcome the defects of the background technology, the utility model provides an anti-falling back driving assembly, which mainly solves the problem that the existing automobile back driving assembly is difficult to ensure anti-falling under the condition that the length of a universal joint is shortened.

The technical scheme adopted by the utility model is as follows:

the anti-drop rear drive assembly comprises a middle shaft, wherein one end of the middle shaft is connected with a first universal joint, the other end of the middle shaft is connected with a second universal joint, the first universal joint comprises a shell, one end of the middle shaft stretches into the shell and is internally provided with a star-shaped sleeve, the outer side of the star-shaped sleeve is provided with a retainer, a rolling ball is arranged on the retainer, and a rolling path matched with the rolling ball is arranged in the shell; the inner wall of the shell is also provided with a bulge, and the boss is arranged on the outer side of the retainer and used for preventing the retainer from being separated from the shell.

The protrusion is a non-complete ring extending circumferentially along the inner wall of the housing.

The intermediate shaft includes a first shaft and a second shaft that are detachably connected.

The first shaft is axially provided with a mounting groove, and the second shaft part extends into the mounting groove and is connected with the first shaft through a fastener.

The fastener includes a screw threaded through an outer wall of the first shaft and coupled to the second shaft.

The second shaft is a solid shaft.

The shell is provided with a connecting pipe and further comprises a dust cover, one end of the dust cover is connected with the intermediate shaft, and the other end of the dust cover is connected with the outer wall of the connecting pipe.

The outer wall of the shell is provided with a boss, and the inner wall of the connecting pipe is provided with a groove matched with the boss in a clamping manner.

The outer wall of the boss is provided with a sealing ring which is in sealing fit with the inner wall of the connecting pipe.

The beneficial effects of the utility model are as follows: the utility model provides an anti-falling rear-drive assembly, wherein a retainer cannot be separated from an inner ball cage under axial tension under the interference of anti-falling ribs, so that the retainer can be effectively prevented from falling from the ball cage when the assembly jolts, and the failure risk of the assembly is reduced.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model.

FIG. 2 is a partial schematic view of an embodiment of the present utility model.

Fig. 3 is an enlarged schematic view at B in fig. 2.

Fig. 4 is an enlarged schematic view at a in fig. 1.

Detailed Description

The utility model is further described below with reference to the accompanying drawings: as shown in the figure, the anti-drop rear drive assembly comprises a middle shaft 1, wherein one end of the middle shaft is connected with a first universal joint 2, the other end of the middle shaft is connected with a second universal joint 3, the first universal joint comprises a shell 21, one end of the middle shaft stretches into the shell and is provided with a star-shaped sleeve 41, the outer side of the star-shaped sleeve is provided with a retainer 42, the retainer is provided with a rolling ball 43, and the shell is internally provided with a rolling path 11 matched with the rolling ball; the inner wall of the shell is also provided with a bulge 12, and the bulge is arranged on the outer side of the retainer and used for preventing the retainer from being separated from the shell. The bulge is arranged on the inner wall of the shell, the bulge and the groove are not mutually influenced, the groove is of a structure similar to a sinking groove of the inner wall of the shell, the bulge can be arranged on the outer side of the retainer relatively, the retainer can only move on the inner side of the bulge, the bulge plays a role in blocking and preventing falling, and the retainer can be effectively prevented from falling from the ball cage when the assembly jolts, so that the failure risk of the assembly is reduced. Compared with the prior design, the structure is lighter and more compact, the axial length of the automobile is reduced compared with the common section type, the whole weight of the automobile is lightened after improvement, and further the drivability and the fuel economy of the automobile are obviously improved.

In this embodiment, as shown, the protrusion is a non-complete ring extending circumferentially along the inner wall of the housing.

In this embodiment, as shown, the intermediate shaft comprises a first shaft 5 and a second shaft 6 which are detachably connected. The conventional assembly requires disassembly of the entire assembly during maintenance of the inner or outer ball cage, and so disassembly of the entire assembly is a factor of the space layout of the chassis and the length of the shaft. This reduces the efficiency of maintenance personnel and increases the installation costs. The intermediate shaft of the assembly can separate the connection of the two inner and outer cages by loosening the two bolts, so that the maintenance efficiency of the inner or outer cages is improved.

In this embodiment, as shown in the drawing, the first shaft is axially provided with a mounting groove 51, and the second shaft portion extends into the mounting groove and is connected to the first shaft by a fastener.

In this embodiment, as shown, the fastener includes a screw 61 that is threaded through the outer wall of the first shaft and the second shaft. The intermediate shaft can separate the connection of the two inner and outer cages by loosening the two bolts, so that the maintenance efficiency of the inner or outer cages is improved.

In this embodiment, as shown in the figure, the second shaft is a solid shaft.

In this embodiment, as shown in the figure, the casing is provided with a connecting pipe 7, and further includes a dust cover 8, one end of the dust cover is connected with the intermediate shaft, and the other end of the dust cover is connected with the outer wall of the connecting pipe. Because the universal joint length is shorter, the universal joint is installed through the extension of the connecting pipe, and the universal joint can be suitable for a common dust cover.

In this embodiment, as shown in the figure, the outer wall of the housing is provided with a boss 13, and the inner wall of the connecting pipe is provided with a groove 71 engaged with the boss.

In this embodiment, as shown in the figure, the outer wall of the boss is provided with a sealing ring 131 in sealing engagement with the inner wall of the connecting pipe. The sealing effect is improved, and leakage is prevented.

In this embodiment, as shown in the drawing, the cross section of the second shaft is a regular hexagon. The intermediate shaft adopts two hexagonal meshing transmissions to fix the shaft lever through two bolts, and meanwhile, the counter weights of the two bolts can play a damping and shock absorbing role. Compared with the traditional assembly solid shaft, the assembly solid shaft can well avoid the increase of jumping during manufacturing due to overlong shaft rod, and the half shaft is easy to generate resonance during use, so that the assembly is vibrated and lifted. The hexagonal half shaft transmission can effectively solve the problems of half shaft resonance and the like, and the driving comfort of the whole vehicle is improved.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The embodiments described with reference to the drawings are exemplary and intended to be illustrative of the utility model and should not be construed as limiting the utility model. The examples should not be construed as limiting the utility model, but any modifications based on the spirit of the utility model should be within the scope of the utility model.

Claims (9)

1. The utility model provides an anticreep falls back drive assembly, includes jackshaft (1), jackshaft one end is connected with first universal joint (2), and the other end is connected with second universal joint (3), its characterized in that: the first universal joint comprises a shell (21), one end of the intermediate shaft stretches into the shell and is provided with an star-shaped sleeve (41), the outer side of the star-shaped sleeve is provided with a retainer (42), the retainer is provided with a rolling ball (43), and a raceway (11) matched with the rolling ball is arranged in the shell;

the inner wall of the shell is also provided with a bulge (12), and the bulge is arranged at the outer side of the retainer and used for preventing the retainer from falling out of the shell;

the intermediate shaft comprises a first shaft (5) and a second shaft (6) which are detachably connected.

2. The anti-drop back drive assembly of claim 1, wherein: the protrusion is a non-complete ring extending circumferentially along the inner wall of the housing.

3. The anti-drop back drive assembly of claim 2, wherein: the first shaft is axially provided with a mounting groove (51), and the second shaft part extends into the mounting groove and is connected with the first shaft through a fastener.

4. A drop-resistant backdrive assembly according to claim 3, wherein: the fastener includes a screw (61) threaded through an outer wall of the first shaft with the second shaft.

5. The anti-drop back drive assembly of claim 4, wherein: the second shaft is a solid shaft.

6. The anti-drop back drive assembly of claim 5, wherein: the shell is provided with a connecting pipe (7) and further comprises a dust cover (8), one end of the dust cover is connected with the intermediate shaft, and the other end of the dust cover is connected with the outer wall of the connecting pipe.

7. The anti-drop back drive assembly of claim 6, wherein: the outer wall of the shell is provided with a boss (13), and the inner wall of the connecting pipe is provided with a groove (71) which is matched with the boss in a clamping way.

8. The anti-drop back drive assembly of claim 7, wherein: the outer wall of the boss is provided with a sealing ring (131) which is in sealing fit with the inner wall of the connecting pipe.

9. The anti-drop back drive assembly of claim 8, wherein: the cross section of the second shaft is regular hexagon.