CN214499829U - Low-noise low-vibration constant velocity universal joint driving shaft - Google Patents

Abstract

The utility model discloses a low noise low vibration constant velocity cardan drive shaft, including tripod subassembly, expanding spring and sliding sleeve, expanding spring's one end and tripod subassembly are connected, and expanding spring's the other end is connected with the sliding sleeve, and the tripod subassembly is close to expanding spring's one end and is equipped with embedded axle, and embedded axle one end is fixed with the tripod subassembly, and the other end of embedded axle stretches into in the expanding spring. The utility model provides a low noise low vibration constant velocity cardan drive shaft has cancelled stifle in GI structure, changes to embedded axle cooperation expanding spring, has realized reducing on the cost to eliminate the abnormal sound and the vibration that drop and bring from this that GI structure probably produced.

Description

Low-noise low-vibration constant velocity universal joint driving shaft

Technical Field

The utility model belongs to the technical field of the constant velocity cardan joint technique and specifically relates to a low noise low vibration constant velocity cardan joint drive shaft is related to.

Background

The constant velocity universal joint driving shaft is an essential part of an automobile chassis part and plays an important role in driving and steering. The constant velocity joint drive shaft is generally composed of a fixed end constant velocity joint (often disposed at the hub end and responsible for the steering function of the wheel), a slip end constant velocity joint (often disposed at the differential or transmission side and responsible for the angular difference compensation and displacement compensation when the automobile chassis is not parallel), and an intermediate shaft rod connecting the fixed end and the slip end. The sliding end constant velocity universal joint is generally composed of a sliding sleeve and a tripod assembly, and the tripod assembly can realize axial movement and angle change in the sliding sleeve, so the sliding end constant velocity universal joint is called. The constant-speed drive shaft universal joint assembly has the advantages that due to the fact that the chassis is arranged unevenly, the center of the hub and the center of the gearbox are not on the same horizontal plane, the constant-speed drive shaft with power transmission and steering functions is required to have a displacement compensation function, and the sliding end constant-speed universal joint achieves the requirement. In the prior art, due to the fact that the chassis is arranged with large position deviation, when the sliding end universal joint is designed, the conventional TJ structure collides with the bottom of the sliding sleeve when the tripod assembly slides in and out in the sliding sleeve channel, and abnormal sound and vibration are generated. In order to solve the problem, a constant velocity universal joint with a GI structure sliding end is developed in the industry, as shown in figure 2, a group of compression springs are additionally arranged in the constant velocity universal joint, spring holes are processed at the bottoms of the sliding sleeves, and a blank cap is arranged on the other side of each compression spring. This scheme passes through compression spring's effect, makes the three round pin subassembly be in the stress state in real time, and because of the restriction of compression spring self compression capacity for the three round pin subassembly also can not collide the sliding sleeve bottom when the compression, has avoided the abnormal sound and the vibration because of the collision production. However, the cost is increased due to the addition of parts, and in operation, the optical axis spindle head is in contact with the end face of the blank cap, so that the blank cap is easy to fall off or interfere with the tripod component during angle change. Therefore, there is a need for a low noise, low vibration constant velocity joint drive shaft that solves the problem of the constant velocity joint drive shaft being prone to come off during angular changes or the problem of the blind coming into interference with the tripod assembly.

Chinese patent application publication No. CN101280810, published as 2008/10/08, entitled "a constant velocity universal joint", discloses a constant velocity universal joint, in which a spring stopper 6 is added to a common movable tripod or a double-offset movable sliding sleeve 2 of the universal joint, so as to ensure the tight fit between an inner end universal joint assembly 1 and a transmission. In order to guarantee the position of the spring 9 in the universal joint sliding sleeve 2 in the spring limiting device 6, a spring seat 8 is additionally arranged between the shaft rod 7 and the spring 9, and meanwhile, the bottom end of the universal joint sliding sleeve 2 also needs to be provided with a spring positioning and guiding groove 10. The length of spring 9 is set for as required, ensures that in the whole stroke of universal joint, the spring all is in compression state, and can not appear the phenomenon of closing when the universal joint moves to the sliding sleeve innermost end. Due to the existence of the spring limiting device 6, the assembly and disassembly become very convenient, and the damage of parts is reduced. But the above problems still exist with constant velocity joints.

Disclosure of Invention

The utility model discloses an overcome the constant velocity joint drive shaft among the prior art and take place the condition that drops or stifle and tripod subassembly emergence interference easily in the angle change, provide a low noise low vibration constant velocity joint drive shaft, structural cancellation stifle of GI changes to embedded axle cooperation expanding spring, has realized the reduction on the cost to eliminate the abnormal sound and the vibration that drop and bring from this that the GI structure probably produced.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a low noise low vibration constant velocity cardan drive shaft, includes tripod subassembly, expanding spring and sliding sleeve, expanding spring's one end and tripod subassembly are connected, and expanding spring's the other end is connected with the sliding sleeve, and the tripod subassembly is close to expanding spring's one end and is equipped with embedded axle, and embedded axle one end is fixed with the tripod subassembly, and the other end of embedded axle stretches into in the expanding spring.

Above-mentioned technical scheme has cancelled stifle, and the spindle nose that will slide the axle designs into embedded and the cooperation of expanding spring internal diameter, and embedded axle can ensure in real time when the swining of three round pin subassembly and axial displacement and the cooperation with expanding spring, can not produce and drop and pull out. Above-mentioned structure has cancelled stifle structurally at the GI, changes to embedded axle cooperation expanding spring, has realized the reduction in the cost to the possible drop that produces of GI structure and abnormal sound and the vibration that brings from this have been eliminated.

Preferably, the side wall of the embedded shaft is of a circular arc structure. The structure can ensure that the position change between the telescopic spring and the embedded shaft is relatively continuous when the three-pin assembly rotates, and the three-pin assembly is not easy to suddenly change to generate vibration and noise.

Preferably, the three-pin assembly comprises a sliding shaft, and the embedded shaft and the sliding shaft are of an integrally formed structure. The structure is convenient for manufacturing the embedded shaft, the embedded shaft can be processed and molded together with the sliding shaft, and the structure strength is high.

Preferably, the sliding sleeve is provided with a spring hole, and one end of the telescopic spring connected with the sliding sleeve is arranged in the spring hole. The structure can guarantee the stability of the end that expanding spring and sliding sleeve are connected.

Preferably, a buffer ring is arranged on the side wall of the spring hole, and the buffer ring is arranged on the side close to the tripod head assembly. The structure can avoid the direct contact of expanding spring and buffer ring lateral wall when the three round pin subassembly rotates, noise reduction.

Preferably, the side wall and the end face of the embedded shaft are in smooth transition. The structure can ensure that the position change between the compression spring and the embedded shaft is relatively continuous when the three-pin assembly is bound to rotate, and the three-pin assembly is not easy to suddenly change to generate vibration and noise.

Preferably, when the telescopic spring is compressed to the limit position, a gap is formed between the tripod assembly and the inner side wall of the sliding sleeve. The structure ensures that the tripod component can not collide the bottom of the sliding sleeve when being compressed, and avoids abnormal sound and vibration caused by collision.

Preferably, the diameter of the embedded shaft is smaller than the inner diameter of the extension spring. The structure facilitates rotation of the tripod assembly.

The utility model has the advantages that: the GI structure is not provided with a blank cap, and an embedded shaft is matched with a telescopic spring instead, so that the cost is reduced, and the falling possibly generated by the GI structure and the abnormal sound and vibration caused by the falling are eliminated.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic diagram of a prior art structure.

In the figure: the novel high-speed stop valve comprises a three-pin assembly 1, a sliding shaft 1.1, an embedded shaft 1.2, a telescopic spring 2, a sliding sleeve 3, a spring hole 3.1, a blank cap 4 and a buffer ring 5.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.

Example (b):

as shown in fig. 1, a low noise low vibration constant velocity cardan drive shaft, including tripod subassembly 1, expanding spring 2 and sliding sleeve 3, expanding spring 2's one end is connected with tripod subassembly 1, and expanding spring 2's the other end is connected with sliding sleeve 3, and tripod subassembly 1 is including the axle 1.1 that slides, and the axle 1.1 that slides is close to expanding spring 2's one end and is equipped with embedded axle 1.2, and embedded axle 1.2 is the integrated into one piece structure with the axle 1.1 that slides, and the one end of embedded axle 1.2 stretches into in the expanding spring 2. The diameter of the embedded shaft 1.2 is smaller than the inner diameter of the telescopic spring 2. When the telescopic spring 2 is compressed to the limit position, a gap is formed between the three-pin assembly 1 and the inner side wall of the sliding sleeve 3. The side wall of the embedded shaft 1.2 is of a circular arc structure, and the side wall and the end face of the embedded shaft 1.2 are in smooth transition. Be equipped with spring hole 3.1 on the sliding sleeve 3, the one end setting that expanding spring 2 and sliding sleeve 3 are connected is in spring hole 3.1. The side wall of the spring hole 3.1 is provided with a buffer ring 5, and the buffer ring 5 is arranged at one side close to the three-pin assembly 1

Above-mentioned technical scheme has cancelled stifle 4, and the spindle nose that will slide axle 1.1 designs into embedded and the cooperation of expanding spring 2 internal diameter, and embedded axle 1.2 can ensure in real time when the swing of three round pin subassembly 1 and axial displacement and the cooperation of expanding spring 2, can not produce and drop and pull out. The structure cancels the blank cap 4 on the GI structure, changes the embedded shaft 1.2 to be matched with the extension spring 2, realizes the reduction on the cost, and eliminates the falling off possibly generated by the GI structure and the abnormal sound and vibration caused by the falling off.

Example 2:

as shown in fig. 1, on the basis of embodiment 1, a cushion ring 5 is arranged on the side wall of the spring hole 3.1, and the cushion ring 5 is arranged on the side close to the tripod head assembly 1

The utility model has the advantages that: the GI structure is provided with the blank cap 4, the embedded shaft 1.2 is used for matching with the extension spring 2, the cost is reduced, and the falling possibly generated by the GI structure and the abnormal sound and vibration caused by the falling are eliminated.

Claims (7)

1. The utility model provides a low noise low vibration constant velocity cardan drive shaft, includes tripod subassembly, expanding spring and sliding sleeve, expanding spring's one end and tripod subassembly are connected, and expanding spring's the other end is connected with the sliding sleeve, and characterized by, the one end that tripod subassembly is close to expanding spring is equipped with embedded axle, and embedded axle one end is fixed with the tripod subassembly, and the other end of embedded axle stretches into in the expanding spring.

2. A low noise, low vibration constant velocity joint drive shaft according to claim 1 wherein said side wall of said inner quill is of arcuate configuration.

3. A low noise, low vibration constant velocity joint drive shaft according to claim 1 wherein said tripod assembly comprises a slip shaft, and wherein said inset shaft is of unitary construction with said slip shaft.

4. A low-noise low-vibration constant velocity universal joint drive shaft according to claim 1, 2 or 3, wherein said sliding sleeve is provided with a spring hole, and an end of said expansion spring connected to said sliding sleeve is provided in said spring hole.

5. A low noise, low vibration constant velocity universal joint drive shaft according to claim 1, 2 or 3 wherein said inner stub shaft is rounded at its side walls and end faces.

6. A low noise, low vibration constant velocity joint drive shaft according to claim 1, 2 or 3 wherein said extension spring is compressed to an extreme position with clearance between said tripod assembly and the inside wall of said sleeve.

7. A low noise, low vibration constant velocity universal joint drive shaft according to claim 1, 2 or 3 wherein said inner embedded shaft has a diameter smaller than the inner diameter of the expansion spring.

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