Full-protection low-abrasion universal joint structure

Abstract

The utility model discloses a fully-protected low-abrasion universal joint structure, relates to the technical field of universal joints, and aims to solve the problems that a contact position is seriously abraded and the service life is influenced after long-time use due to the lack of a lubricating structure when a cross shaft and a universal joint fork in the conventional universal joint are in running fit. According to the technical scheme, the universal joint fork is characterized by comprising a universal joint fork body, an oil injection hole is reserved in the outer side of the universal joint fork body, internal threads are arranged in the oil injection hole, an oil plugging head is installed in the oil injection hole, external threads are arranged on the outer side of the oil plugging head, and a lug hole is formed in the universal joint fork body; first oil injection grooves and second oil injection grooves are formed in the universal joint forks, oil outlet holes are reserved in the inner sides of the universal joint forks, and a cross shaft is installed between the universal joint forks. And the effect of stable use is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of universal joints, in particular to a fully protected low-wear universal joint structure. Background Art

[0002] A universal joint is a mechanical component that realizes variable-angle power transmission. It is used in positions where the direction of the transmission axis needs to be changed. It is the "joint" component of the universal joint device of the automobile drive system. The combination of the universal joint and the drive shaft is called a universal joint transmission device. In front-engine rear-wheel drive vehicles, the universal joint transmission device is installed between the transmission output shaft and the input shaft of the drive axle final reducer, while in front-engine front-wheel drive vehicles, the drive shaft is omitted and the universal joint is installed between the front axle half shaft and the wheel, which is responsible for both driving and steering.

[0003] The above-mentioned prior art solutions have the following defects: when the cross shaft and the universal joint fork inside the existing universal joint are rotated and matched, there is a lack of a lubrication structure, so that after long-term use, the contact position is severely worn, which affects the service life. Utility Model Content

[0004] The utility model aims to provide a low-wear universal joint structure with full protection.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A fully protected low-wear universal joint structure comprises a universal joint fork, an oil filling hole is reserved on the outer side of the universal joint fork, an internal thread is arranged inside the oil filling hole, an oil plug is installed inside the oil filling hole, an external thread is arranged on the outer side of the oil plug, an ear hole is opened inside the universal joint fork, a first oil filling groove and a second oil filling groove are opened inside the universal joint fork, an oil outlet hole is reserved on the inner side of the universal joint fork, and a cross shaft is installed between the universal joint forks.

[0007] By adopting the above technical solution, an oil injection structure is added to the position where the universal joint fork and the cross shaft are in contact and operation, and oil injection holes and oil injection grooves are added. Lubricating oil can be injected into the groove and then flow out through the oil outlet hole. The outer side of the cross shaft can be lubricated at any time to avoid severe wear.

[0008] Furthermore, the oil filling hole, the oil plug, the ear hole, the first oil filling groove and the second oil filling groove are symmetrically arranged in two about the vertical center line of the universal joint fork, and the oil outlet holes are symmetrically arranged in two groups, and each group of the oil outlet holes has multiple holes distributed in an annular manner with equal intervals.

[0009] By adopting the above technical solution, an oil injection structure is added to the two ear plate positions on the outer side of the universal joint fork to ensure that each position can be lubricated.

[0010] Furthermore, the internal thread and the external thread are threadedly connected, and the oil filling hole, the first oil filling groove and the second oil filling groove are connected to each other.

[0011] By adopting the above technical solution and increasing the connection between the oil plug and the oil filling hole, refueling can be carried out at any time.

[0012] Furthermore, the oil outlet hole is connected to the second oil filling groove, and the oil outlet hole penetrates to the inner side of the ear hole.

[0013] By adopting the above technical solution, the outer side of the cross shaft can be evenly lubricated through multiple oil outlet holes, thereby improving the lubrication effect.

[0014] Furthermore, the four end surfaces on the outer side of the cross axis are all in contact with the inner side of the ear hole.

[0015] By adopting the above technical solution, the stability of structural operation and the lubrication effect are improved.

[0016] In summary, the beneficial technical effects of the utility model are:

[0017] An oil filling hole, a first oil filling groove, a second oil filling groove and an oil outlet hole are adopted. When lubricating oil needs to be added, the oil plug can be opened, and the lubricating oil can be added to the oil filling hole, and then enter the oil outlet hole through the two oil filling grooves and then flow out. The outer side of the cross shaft can be lubricated, the lubrication effect of the connection between the cross shaft and the universal joint fork is improved, wear is reduced, and a stable use effect is produced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The overall structure of the utility model is shown in FIG. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0020] Figure 3 The overall structure of the utility model is shown in FIG. Figure 2 ;

[0021] Figure 4 For this utility model Figure 3 Enlarged structural diagram at A in the middle.

[0022] In the figure, 1. universal joint fork; 2. oil filling hole; 3. internal thread; 4. oil plug; 5. external thread; 6. ear hole; 7. first oil filling groove; 8. second oil filling groove; 9. oil outlet hole; 10. cross shaft. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] Reference Figure 1-4 A fully protected low-wear universal joint structure comprises a universal joint fork 1, an oil filling hole 2 is reserved on the outer side of the universal joint fork 1, an internal thread 3 is arranged inside the oil filling hole 2, an oil plug 4 is installed inside the oil filling hole 2, and an external thread 5 is arranged on the outer side of the oil plug 4, an ear hole 6 is opened inside the universal joint fork 1, a first oil filling groove 7 and a second oil filling groove 8 are opened inside the universal joint fork 1, an oil outlet hole 9 is reserved on the inner side of the universal joint fork 1, and a cross shaft 10 is installed between the universal joint forks 1. An oil filling structure is added at the position where the universal joint fork 1 and the cross shaft 10 are in contact and running. By adding the oil filling hole 2 and the oil filling groove, the lubricating oil can be injected into the groove and then flow out through the oil outlet hole 9. The outer side of the cross shaft 10 can be lubricated at any time to avoid severe wear.

[0025] like Figure 1-4 As shown, the oil filling hole 2, the oil plug 4, the ear hole 6, the first oil filling groove 7 and the second oil filling groove 8 are respectively symmetrically arranged with two of them about the vertical center line of the universal joint fork 1, and the oil outlet holes 9 are symmetrically arranged in two groups, and each group of oil outlet holes 9 has a plurality of oil outlet holes 9 distributed in an annular manner with equal intervals. The internal thread 3 and the external thread 5 are threadedly connected, the oil filling hole 2, the first oil filling groove 7 and the second oil filling groove 8 are connected to each other, the oil outlet hole 9 is connected to the second oil filling groove 8, the oil outlet hole 9 penetrates to the inner side of the ear hole 6, and the four end faces of the outer side of the cross shaft 10 are in contact with the inner side of the ear hole 6, and the oil filling structure is added at the two ear plate positions on the outer side of the universal joint fork 1 to ensure that each position can be lubricated.

[0026] The implementation principle of this embodiment is: when the universal joint needs to be lubricated, the oil plug 4 can be opened by means of a thread, and the lubricating oil can be injected into the oil filling hole 2. At the same time, the lubricating oil flows through the first oil filling groove 7 to the second oil filling groove 8, and then flows out through the oil outlet hole 9. The flowing lubricating oil can lubricate the outer side of the cross shaft 10, thereby improving the lubrication effect of the connection, reducing wear and increasing the service life.

[0027] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A fully protected low-wear universal joint structure, comprising a universal joint fork (1), characterized in that: An oil filling hole (2) is reserved on the outer side of the universal joint fork (1), an internal thread (3) is arranged inside the oil filling hole (2), an oil plug (4) is installed inside the oil filling hole (2), an external thread (5) is arranged on the outer side of the oil plug (4), an ear hole (6) is opened inside the universal joint fork (1), a first oil filling groove (7) and a second oil filling groove (8) are opened inside the universal joint fork (1), an oil outlet hole (9) is reserved on the inner side of the universal joint fork (1), and a cross shaft (10) is installed between the universal joint forks (1).

2. The fully protected low-wear universal joint structure according to claim 1, characterized in that: The oil filling hole (2), the oil plug (4), the ear hole (6), the first oil filling groove (7) and the second oil filling groove (8) are respectively arranged symmetrically with respect to the vertical center line of the universal joint fork (1), and the oil outlet holes (9) are arranged symmetrically in two groups, and each group of the oil outlet holes (9) has a plurality of holes distributed in an annular manner at equal intervals.

3. The fully protected low-wear universal joint structure according to claim 1, characterized in that: The internal thread (3) and the external thread (5) are threadedly connected, and the oil injection hole (2), the first oil injection groove (7) and the second oil injection groove (8) are connected to each other.

4. The fully protected low-wear universal joint structure according to claim 1, characterized in that: The oil outlet hole (9) is connected to the second oil filling groove (8), and the oil outlet hole (9) penetrates to the inner side of the ear hole (6).

5. The fully protected low-wear universal joint structure according to claim 1, characterized in that: The four end surfaces on the outside of the cross axis (10) are all in contact with the inside of the ear hole (6).

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