Three-section sliding type universal joint assembly

Abstract

The utility model discloses a three-section sliding type universal joint assembly. The universal joint assembly mainly solves the problems that an existing universal joint assembly is limited in sliding stroke, not good in effect and incapable of meeting the requirement for large sliding amount. The device is characterized in that the intermediate shaft comprises a first shaft (11) and a second shaft (12), a first sliding groove (111) is formed in the first shaft, and part of the second shaft extends into the sliding groove and is in sliding fit with the sliding groove; the second universal joint comprises a shell (31), a transmission shaft (4) is connected to the shell, a second sliding groove (41) is formed in the axial direction of the transmission shaft, the second universal joint further comprises a connecting shaft (42) used for being connected with a differential mechanism, and part of the connecting shaft stretches into the second sliding groove and is in sliding fit with the second sliding groove. The three-section sliding type universal joint assembly has the advantages of being large in sliding amount and light in weight, the sliding effect of products is improved, the service life of the products is prolonged, the mass of the whole automobile is reduced, the light weight requirement of the market is met, and energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile parts, concretely relates to a three-section sliding universal joint assembly. BACKGROUND

[0002] The existing transmission shaft assembly mostly adopts the form of fixed end universal joint, solid intermediate shaft and sliding end universal joint combination, mostly only uses the sliding end universal joint to slide, the sliding stroke is limited, the effect is not very good, and cannot satisfy the large sliding amount demand. CONTENT OF UTILITY MODEL

[0003] In order to overcome the insufficient of background art, the utility model provides a three-section sliding universal joint assembly, mainly solves the current universal joint assembly sliding stroke is limited, the effect is not very good, and cannot satisfy the large sliding amount demand problem.

[0004] The technical scheme of the utility model provides,

[0005] A three-section sliding universal joint assembly, including intermediate shaft, first universal joint is installed to one end of intermediate shaft, second universal joint is installed to the other end of intermediate shaft, intermediate shaft includes first shaft and second shaft, first sliding slot is equipped in first shaft, part of second shaft extends into and is slidably connected with sliding slot;

[0006] Second universal joint includes shell, transmission shaft is connected on shell, the axial direction of transmission shaft is equipped with second sliding slot, still include the connecting shaft for being connected with differential, part of connecting shaft extends into second sliding slot and is slidably connected with second sliding slot.

[0007] First retainer is equipped in first sliding slot, first rolling element is equipped on first retainer, first retainer is equipped on the circumferential outside of second shaft that extends into first sliding slot, first rolling element is slidably connected with the inner wall of first sliding slot.

[0008] Second retainer is equipped in second sliding slot, second rolling element is equipped on second retainer, second retainer is equipped on the circumferential outside of connecting shaft that extends into second sliding slot, second rolling element is slidably connected with the inner wall of second sliding slot.

[0009] Second universal joint is sliding universal joint.

[0010] Transmission shaft includes connecting section and straight cylinder section, the circumferential outer wall of connecting section is equipped with spline, second sliding slot is equipped in straight cylinder section.

[0011] Connecting section and straight cylinder section are connected together through friction welding.

[0012] First rolling element and second rolling element are steel ball.

[0013] The utility model discloses a three -section slip type universal joint assembly has the advantage of big slip, and the weight is small, has improved product slip effect and service life, alleviated automobile whole vehicle quality meets market light weight demand, reduces energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a sectional view schematic diagram of one embodiment of the utility model.

[0015] Figure 2 It is Figure 1 It is the enlarged diagram of A in the middle.

[0016] Figure 3 It is Figure 1 It is the enlarged diagram of B in the middle.

[0017] Figure 4 It is Figure 1 It is the enlarged diagram of C in the middle. DETAILED DESCRIPTION

[0018] The utility model discloses a three -section slip type universal joint assembly, including intermediate shaft 1, one end of the intermediate shaft is installed with first universal joint 2, the other end second universal joint 3 of the intermediate shaft, the intermediate shaft includes first axle 11 and second axle 12, first sliding slot 111 is equipped in the first axle, and part second axle stretches into and the sliding fit with the sliding slot in the sliding slot;Second universal joint includes the casing 31, is connected with transmission shaft 4 on the casing, and the axial of transmission shaft is equipped with second sliding slot 41, still include the connecting axle 42 for being connected with differential, and part connecting axle stretches into the second sliding slot and the sliding fit with the second sliding slot in the second sliding slot.This application has the slip of universal joint itself, the slip of intermediate shaft, the slip of differential connecting axle three -section of the slip, and the overall slip amount is big, and adopts the hollow axle design, and the overall weight is lighter.

[0019] In this embodiment, as shown in the figure, first retainer 112 is equipped in the first sliding slot, first rolling element 113 is equipped on the first retainer, the first retainer is equipped on the circumferential outside of the second axle that stretches into the first sliding slot, and the first rolling element and the inner wall of the first sliding slot slide together. The first sliding slot inner wall can be provided with a channel to cooperate with the first rolling element, and a retaining ring can be provided at the outlet of the first sliding slot to prevent it from coming out.

[0020] In the embodiment, as shown in the drawings, the second sliding groove is provided with a second retainer 441, the second retainer is provided with a second rolling element 412, the second retainer is arranged on the circumferential outer side of the connecting shaft extending into the second sliding groove, and the second rolling element is in sliding fit with the inner wall of the second sliding groove. The structure is similar to that of the first sliding groove, but is arranged on the shaft connected with the differential.

[0021] In the embodiment, as shown in the drawings, the second universal joint is a sliding universal joint.

[0022] In the embodiment, as shown in the drawings, the transmission shaft comprises a connecting segment 401 and a straight cylinder segment 402, the circumferential outer wall of the connecting segment is provided with a spline, and the second sliding groove is arranged on the straight cylinder segment.

[0023] In the embodiment, as shown in the drawings, the connecting segment and the straight cylinder segment are connected together through friction welding. The straight cylinder segment can be friction welded with the connecting segment after the straight cylinder segment is processed, and the installation is relatively convenient.

[0024] In the embodiment, as shown in the drawings, the first rolling element and the second rolling element are steel balls.

[0025] In the description of the utility model, it is understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0026] In addition, the terms "first" and "second" are only for the purpose of description, and cannot 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" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0027] The embodiments described with reference to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as limiting the utility model. The embodiments should not be regarded as limiting the utility model, but any improvement made on the basis of the spirit of the utility model should be within the protection scope of the utility model.

Claims

1. A three-stage slip universal joint assembly, comprising a middle shaft (1), a first universal joint (2) mounted at one end of the middle shaft, and a second universal joint (3) mounted at the other end of the middle shaft, characterized in that: the middle shaft comprises a first shaft (11) and a second shaft (12), the first shaft is provided with a first sliding groove (111) therein, and part of the second shaft extends into the first sliding groove and is in sliding fit with the first sliding groove; the second universal joint comprises a housing (31), a transmission shaft (4) connected to the housing, an axial second sliding groove (41) provided in the transmission shaft, and a connecting shaft (42) for connecting with a differential, part of the connecting shaft extending into the second sliding groove and being in sliding fit with the second sliding groove.

2. A three-stage slip-type universal joint assembly as described in claim 1, characterized in that: the first sliding groove is provided with a first retainer (112), the first retainer is provided with a first rolling element (113), the first retainer is arranged on the circumferential outer side of the second shaft extending into the first sliding groove, and the first rolling element is in sliding fit with the inner wall of the first sliding groove.

3. A three-stage slip-type universal joint assembly as described in claim 2, characterized in that: the second sliding groove is provided with a second retainer (441), the second retainer is provided with a second rolling element (412), the second retainer is arranged on the circumferential outer side of the connecting shaft extending into the second sliding groove, and the second rolling element is in sliding fit with the inner wall of the second sliding groove.

4. A three-stage slip-type universal joint assembly as described in claim 3, wherein: the second universal joint is a slip universal joint.

5. A three-stage slip-type universal joint assembly as described in claim 4, wherein: the transmission shaft comprises a connecting section (401) and a straight section (402), the connecting section is provided with a spline on the circumferential outer wall, and the second sliding groove is arranged in the straight section.

6. A three-stage slip-type universal joint assembly as described in claim 5, wherein: the connecting section and the straight section are connected together by friction welding.

7. A three-stage slip-type universal joint assembly as set forth in claim 6, characterized in that: the first rolling element and the second rolling element are steel balls.

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