Ball cage type universal joint with ventilation ring sealing cover

Abstract

The utility model relates to a ball cage type universal joint with ventilation ring sealing covers, which comprises a main shaft and a spherical shell, a first steel belt hoop is arranged on the spherical shell, and a first sealing cover and a second sealing cover are fixed on the main shaft through a second steel belt hoop; one end of the first sealing cover is connected with the first steel belt hoop, and the other end is lapped with the second sealing cover; a ventilation ring is arranged below the lap joint part of the first sealing cover and the second sealing cover, extends in the axial direction of the main shaft and is provided with a bent ventilation channel in the axial direction. The spherical shell is sealed through the first sealing cover and the second sealing cover, the ventilation ring is arranged below the first sealing cover and the second sealing cover, the bent ventilation channel is formed in the ventilation ring, and when the temperature in the spherical shell rises to cause the air pressure to be increased, air can jack up the second sealing cover through the ventilation channel to be exhausted; and when the air pressure is reduced and air is not exhausted, the second sealing cover recovers to be attached to the main shaft, and dust and water vapor are prevented from entering.

Description

Technical Field

[0001] This utility model relates to the field of ball cage universal joint technology, and in particular to a ball cage universal joint with a vent ring sealing cover. Background Technology

[0002] A ball-cage universal joint is a mechanism that transmits motion and torque when the driving and driven shafts are displaced. It is widely used as an important component in automotive transmission systems, where it transfers engine power from the transmission to the drive wheels, propelling the car at high speeds. To prevent dust and moisture from entering the spherical housing, a sealing cover is usually installed on the outside of the housing. However, the high-speed rotation of the universal joint and the heat generated by the oscillation of components inside the housing increase the internal pressure, causing the sealing cover to bulge and potentially leading to damage.

[0003] For example, the patent number is "201220434099.2", the patent name is "a ball cage type universal joint", and the publication date is February 20, 2013. It discloses a ball cage type universal joint, but it cannot allow air to pass through when the air pressure inside the sealing cover is too high.

[0004] Therefore, there is an urgent need for a ball cage universal joint with a breathable ring sealing cover, which can discharge gas when the gas pressure inside the spherical shell is too high. Utility Model Content

[0005] This utility model provides a ball cage universal joint with a vent ring sealing cover to solve the problem that existing ball cage universal joints cannot vent when the air pressure inside the spherical shell increases.

[0006] To overcome the above-mentioned technical problems, according to an embodiment of the present invention, a ball cage universal joint with a vent ring sealing cover includes a main shaft and a spherical shell. A first steel band is provided on the spherical shell, and a first sealing cover and a second sealing cover are fixed on the main shaft by a second steel band. One end of the first sealing cover is connected to the first steel band, and the other end overlaps with the second sealing cover. A vent ring is provided below the overlapping part of the first sealing cover and the second sealing cover. The vent ring extends axially along the main shaft and has a bent venting channel in the axial direction.

[0007] In some embodiments, the other end of the first sealing cover is pressed against the underside of the second sealing cover, and the vent ring is located on the underside of the first sealing cover.

[0008] In some embodiments, the main shaft has a mounting groove, and the vent ring is disposed in the mounting groove.

[0009] In some embodiments, a snap-fit ​​groove is provided on the outer peripheral side of the other end of the first sealing cover, and a snap-fit ​​protrusion is provided on the inner peripheral side of the second sealing cover, the snap-fit ​​protrusion cooperating with the snap-fit ​​groove.

[0010] In some embodiments, both ends of the vent ring are raised outwards.

[0011] In some embodiments, the two ends of the breathable ring are curved outwards in an arc shape.

[0012] In some embodiments, the ventilation channel is formed by an open opening on the ventilation ring.

[0013] In some embodiments, the ventilation channel includes a first axial portion, a circumferential portion, and a second axial portion connected in sequence, wherein the extending directions of the first axial portion and the second axial portion are perpendicular to the extending direction of the circumferential portion.

[0014] In some embodiments, the side of the second sealing cover that mates with the spindle is an interference fit.

[0015] The technical solutions provided by the embodiments of this utility model may include the following beneficial effects:

[0016] This invention seals the spherical shell with a first sealing cover and a second sealing cover, and sets a vent ring below the first sealing cover and the second sealing cover. The vent ring has a bent venting channel. When the temperature inside the spherical shell rises and the air pressure increases, the gas will push up the second sealing cover through the venting channel to exhaust the gas. When the air pressure decreases and no gas is exhausted, the second sealing cover returns to its original position on the main shaft to prevent dust and moisture from entering. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0018] Figure 1 This is a cross-sectional schematic diagram of a ball cage universal joint with a vent ring sealing cover according to an exemplary embodiment.

[0019] Figure 2 This is a side view of the vent ring of a ball cage universal joint with a vent ring seal, according to an exemplary embodiment.

[0020] Figure 3 This is a front view of the vent ring of a ball cage universal joint with a vent ring sealing cover, according to an exemplary embodiment.

[0021] In the figure, 1. Main shaft; 2. Spherical shell; 3. First steel band clamp; 4. Second steel band clamp; 5. First sealing cover; 501. Snap-fit ​​groove; 6. Second sealing cover; 601. Snap-fit ​​protrusion; 7. Ventilation ring; 701. Ventilation channel; 7011. First axial part; 7012. Circumferential part; 7013. Second axial part; 8. Mounting groove. Detailed Implementation

[0022] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0023] like Figures 1 to 3 As shown, this utility model provides a ball cage universal joint with a breathable ring sealing cover. Some specific embodiments are described below. A ball cage universal joint with a breathable ring sealing cover includes a main shaft 1 and a spherical shell 2. The cage, star sleeve, steel ball, etc. used for transmission between the main shaft 1 and the spherical shell 2 are the same as those in the prior art and will not be described again here.

[0024] In this specific embodiment, a first steel band clamp 3 is installed on the spherical shell 2, and a first sealing cover 5 and a second sealing cover 6 are fixed on the main shaft 1 via a second steel band clamp 4. One end of the first steel band clamp 3 is clamped onto the spherical shell 2, and the other end is connected to the first sealing cover 5. Specifically, the other end of the first steel band clamp 3 is a bend structure, and one end of the first sealing cover 5 is clamped within this bend structure of the first steel band clamp 3 to achieve connection. This is prior art and will not be described in detail here.

[0025] Importantly, the other end of the first sealing cover 5 overlaps with the second sealing cover 6, and a vent ring 7 is installed below the overlap of the first sealing cover 5 and the second sealing cover 6, with a second steel band clamp 4 pressing and fixing it above. The vent ring 7 extends axially along the main shaft 1 and has a bent venting channel 701 in the axial direction. When the internal heat is generated due to mechanical actions such as rotation and swing inside the spherical shell 2, the air pressure inside the spherical shell 2 increases, and the gas can enter the venting channel 701 through the first sealing cover 5 and enter the second sealing cover 6, and be squeezed out from the end of the second sealing cover 6, preventing the first sealing cover 5 from bulging due to excessive air pressure.

[0026] In some specific embodiments, more specifically, the other end of the first sealing cover 5 is pressed against the lower side of the second sealing cover 6, and the vent ring 7 is located on the lower side of the first sealing cover 5. A snap-fit ​​groove 501 is provided on the outer peripheral side of the other end of the first sealing cover 5, and a snap-fit ​​protrusion 601 is provided on the inner peripheral side of the second sealing cover 6. The snap-fit ​​protrusion 601 cooperates with the snap-fit ​​groove 501, so that one end of the second sealing cover 6 is pressed on the first sealing cover 5, and the second steel band clamp 4 is pressed tightly on the outer peripheral side of the second sealing cover 6. In this way, the second sealing cover 6, the first sealing cover 5, and the vent ring 7 are pressed onto the main shaft 1 in sequence.

[0027] To ensure the proper installation position of the vent ring 7, a mounting groove 8 is provided on the main shaft 1. The vent ring 7 is fixed in the mounting groove 8, so that the vent ring 7 will not sway arbitrarily along the axial direction on the main shaft 1.

[0028] More specifically, in order to ensure that gas can easily enter the ventilation channel 701 during ventilation, both ends of the ventilation ring 7 are raised outwards, and the shape of the two ends of the ventilation ring 7 raised outwards is arc-shaped.

[0029] In this specific embodiment, the venting channel 701 is formed by an open opening on the venting ring 7, so that the venting ring 7 can adapt to main shafts 1 of different diameters. The venting channel 701 includes a first axial portion 7011, a circumferential portion 7012, and a second axial portion 7013 connected in sequence. The extending directions of the first axial portion 7011 and the second axial portion 7013 are perpendicular to the extending direction of the circumferential portion 7012, so that there is a certain resistance when the high-pressure gas is discharged from the venting channel 701. Only when the high-pressure gas has a certain pressure can it break through the restriction of the venting channel 701 and the second sealing cover 6 to be discharged.

[0030] The second sealing cover 6 has an interference fit with the main shaft 1 on one side. Only when the high-pressure gas reaches a certain pressure can it break through the venting channel 701 and the restriction of the second sealing cover 6 to be discharged. When the gas pressure decreases and the gas is no longer discharged, the second sealing cover 6 returns to the interference fit with the main shaft 1 to prevent dust and moisture from entering.

[0031] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A ball cage type universal joint with a grommet seal, comprising a main shaft and a spherical shell, characterized in that, A first steel band is provided on the spherical shell, and a first sealing cover and a second sealing cover are fixed on the main shaft by a second steel band. One end of the first sealing cover is connected to the first steel band, and the other end overlaps with the second sealing cover. A venting ring is provided below the overlapping part of the first sealing cover and the second sealing cover. The venting ring extends along the axial direction of the main shaft and has a bent venting channel in the axial direction.

2. The ball cage type universal joint with a breather ring sealed boot of claim 1 wherein, The other end of the first sealing cover is pressed against the lower side of the second sealing cover, and the vent ring is located on the lower side of the first sealing cover.

3. The ball cage universal joint with a vent ring sealing cover according to claim 2, characterized in that, The main shaft has a mounting groove, and the vent ring is disposed in the mounting groove.

4. The ball cage type universal joint with a breather ring sealed boot of claim 2 wherein, The other end of the first sealing cover has a snap-fit ​​groove on its outer periphery, and the inner periphery of the second sealing cover has a snap-fit ​​protrusion, which engages with the snap-fit ​​groove.

5. The ball cage type universal joint with a breather ring sealed boot of claim 1 wherein, Both ends of the breathable ring curve outwards.

6. The ball cage type universal joint with a breather ring sealed boot of claim 5 wherein, The two ends of the breathable ring curve outwards in an arc shape.

7. The ball cage universal joint with a vent ring sealing cover according to claim 1, characterized in that, The ventilation channel is formed by an open opening on the ventilation ring.

8. The ball cage type universal joint with a breather ring sealed boot of claim 7 wherein, The ventilation channel includes a first axial portion, a circumferential portion, and a second axial portion connected in sequence, wherein the extending directions of the first axial portion and the second axial portion are perpendicular to the extending direction of the circumferential portion.

9. The ball cage type universal joint with a breather ring sealed boot of claim 1 wherein, The side of the second sealing cover that mates with the main shaft has an interference fit.

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