Double-hollow-pipe light-weight constant-speed driving shaft assembly

Abstract

The utility model discloses a double-hollow-pipe light-weight constant-speed driving shaft assembly. The problem that potential safety hazards exist due to the fact that a conventional constant-speed driving shaft assembly is of a hollow structure is mainly solved. The intermediate shaft is characterized in that the intermediate shaft comprises an outer pipe (11), and a first cavity (111) is formed in the outer pipe (11); the inner pipe (12) is arranged in the first cavity, and a second cavity (121) is formed in the inner pipe (12); and the lantern ring (13) is arranged on the outer wall of the inner pipe in a sleeving mode, and the outer wall of the lantern ring makes contact with the inner wall of the outer pipe. According to the double-hollow-pipe light-weight constant-speed driving shaft assembly, the inner hollow pipe and the outer hollow pipe are adopted to replace a traditional intermediate shaft structure, the strength is large, the weight is light relative to a solid structure, and the performance and the market competitiveness of the constant-speed universal joint driving shaft assembly are improved.

Description

Technical Field

[0001] The utility model relates to the field of automobile parts, in particular to a double hollow tube lightweight constant velocity drive shaft assembly. Background Art

[0002] As shown in the Chinese patent with authorization announcement number CN 206754198, in order to achieve lightweight, the intermediate shaft of the current drive shaft assembly is made into a hollow structure, but when applied to a longer shaft body, it will be insufficient in strength, posing a safety hazard. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the utility model provides a double hollow tube lightweight constant velocity drive shaft assembly, which mainly solves the problem of potential safety hazards in conventional constant velocity drive shaft assemblies that adopt hollow structures.

[0004] The technical solution of the utility model is:

[0005] A double hollow tube lightweight constant velocity drive shaft assembly includes an intermediate shaft, one end of the intermediate shaft is provided with a first universal joint, and the other end of the intermediate shaft is provided with a second universal joint.

[0006] An outer tube having a first cavity therein;

[0007] an inner tube, disposed in the first cavity and having a second cavity therein;

[0008] The sleeve is sleeved on the outer wall of the inner tube, and the outer wall of the sleeve is in contact with the inner wall of the outer tube.

[0009] The outer tube and the inner tube are coaxially arranged.

[0010] The intermediate shaft comprises a left half shaft, a middle half shaft and a right half shaft, the left half shaft is connected to a first universal joint, the right half shaft is connected to a second universal joint, and the intermediate shaft comprises the inner tube and the outer tube.

[0011] The left half shaft is friction welded to the middle half shaft.

[0012] The middle half shaft and the right half shaft are friction welded.

[0013] The first universal joint includes a housing and a dust cover, one end of the dust cover is connected to the circumferential outer wall of the housing, and the other end of the dust cover is connected to the circumferential outer wall of the intermediate shaft.

[0014] The collar is made of rubber.

[0015] The beneficial effect of the utility model is that the utility model provides a double hollow tube lightweight constant velocity drive shaft assembly, which adopts inner and outer hollow tubes to replace the traditional intermediate shaft structure, has high strength and is relatively light in weight compared to a solid one, thereby improving the performance and market competitiveness of the constant velocity universal joint drive shaft assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the utility model.

[0017] Figure 2 It is a partial cross-sectional schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings: As shown in the figure, a double hollow tube lightweight constant velocity drive shaft assembly includes an intermediate shaft 1, one end of the intermediate shaft is provided with a first universal joint 2, and the other end is provided with a second universal joint 3, the intermediate shaft includes an outer tube 11, the interior of which is provided with a first cavity 111; an inner tube 12, which is provided in the first cavity and has a second cavity 121; a collar 13, which is sleeved on the outer wall of the inner tube, and the outer wall of the collar contacts the inner wall of the outer tube. The structure of using inner and outer hollow tubes to replace the traditional intermediate shaft has high strength and is relatively light in weight compared to solid ones, which improves the performance and market competitiveness of the constant velocity joint drive shaft assembly.

[0019] In this embodiment, as shown in the figure, the outer tube and the inner tube are coaxially arranged.

[0020] In this embodiment, as shown in the figure, the intermediate shaft includes a left half shaft 101, a middle half shaft 102 and a right half shaft 103, the left half shaft is connected to the first universal joint, the right half shaft is connected to the second universal joint, and the intermediate shaft includes the inner tube and the outer tube. The hollow tube of the middle section does not need to be turned after welding, which can eliminate the problems of tool vibration, high processing difficulty, high scrap rate, high tool cost and high processing cost.

[0021] In this embodiment, as shown in the figure, the left half-shaft is friction welded with the middle half-shaft. The friction welding structure (left and right connecting rods + inner and outer hollow tubes are friction welded as components) is adopted, and is assembled and used together with the fixed universal joint of the constant velocity universal joint drive shaft assembly and the mobile universal joint and other accessories; the deviation and steering wheel vibration caused by the large difference in the length of the left and right half-shafts during rapid acceleration are eliminated, and the double-tube welding structure increases the static torsion strength of the product. When loading the vehicle, it is also convenient to assemble the drive shaft assembly and the reducer end, reducing the cost of raw materials for the product, while also reducing the weight of the vehicle, and improving the endurance of electric new energy vehicles.

[0022] In this embodiment, as shown in the figure, the middle half shaft and the right half shaft are friction welded.

[0023] In this embodiment, as shown in the figure, the first universal joint includes a housing and a dust cover 5, one end of which is connected to the circumferential outer wall of the housing and the other end is connected to the circumferential outer wall of the intermediate shaft to prevent dust from entering.

[0024] In this embodiment, as shown in the figure, the collar is made of rubber.

[0025] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] The embodiments described with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention. The embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. A double hollow tube lightweight constant velocity drive shaft assembly, comprising an intermediate shaft (1), one end of the intermediate shaft being provided with a first universal joint (2) and the other end being provided with a second universal joint (3), characterized in that: The intermediate shaft includes An outer tube (11) having a first cavity (111) disposed therein; An inner tube (12) is arranged in the first cavity and has a second cavity (121) therein; The sleeve ring (13) is sleeved on the outer wall of the inner tube, and the outer wall of the sleeve ring is in contact with the inner wall of the outer tube.

2. A double hollow tube lightweight constant velocity drive shaft assembly according to claim 1, characterized in that: The outer tube and the inner tube are coaxially arranged.

3. The double hollow tube lightweight constant velocity drive shaft assembly according to claim 1, characterized in that: The intermediate shaft comprises a left half shaft (101), a middle half shaft (102) and a right half shaft (103); the left half shaft is connected to a first universal joint, the right half shaft is connected to a second universal joint, and the intermediate shaft comprises the inner tube and the outer tube.

4. The double hollow tube lightweight constant velocity drive shaft assembly according to claim 3, characterized in that: The left half shaft is friction welded to the middle half shaft.

5. A double hollow tube lightweight constant velocity drive shaft assembly according to claim 4, characterized in that: The middle half shaft and the right half shaft are friction welded.

6. A double hollow tube lightweight constant velocity drive shaft assembly according to claim 5, characterized in that: The first universal joint comprises a housing and a dust cover (5), one end of the dust cover being connected to the circumferential outer wall of the housing and the other end of the dust cover being connected to the circumferential outer wall of the intermediate shaft.

7. A double hollow tube lightweight constant velocity drive shaft assembly according to claim 6, characterized in that: The collar is made of rubber.

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