Universal joint bearing with improved sealing effect

Abstract

The present invention relates to the technical field of bearings, and in particular to a universal joint bearing with improved sealing effect, comprising a connecting shaft body, a shaft rod arranged on the connecting shaft body, a shaft sleeve sleeved on the shaft rod, and a plurality of rollers arranged on the shaft sleeve, wherein the plurality of rollers are in rolling contact with the outer side surface of the shaft rod, and further comprising a shaft oil seal arranged on the peripheral side of the shaft rod and located below the shaft sleeve, a sleeve oil seal arranged on the inner peripheral side of the lower end of the sleeve, an upper sealing lip arranged on the shaft oil seal, a side sealing lip arranged on the peripheral side of the shaft oil seal, a face convex ring arranged on the upper end surface of the shaft oil seal, and a sleeve sealing lip arranged at the upper end of the sleeve oil seal, wherein the sleeve oil seal is located above the shaft oil seal, and the sleeve sealing lip is an elastic ring.

Description

Technical Field

[0001] The invention relates to the technical field of bearings, and in particular to a universal joint bearing with improved sealing effect. Background Art

[0002] Universal joint bearings refer to mechanical structures that use ball-type connections to achieve power transmission between different shafts. They are a very important component of automotive bearings. The combination of a universal joint and a drive shaft is called a universal joint transmission.

[0003] In order to extend the service life of the universal joint bearing during use, lubricating oil must be added to the roller part. When the bearing rotates, the lubricating oil forms an oil film between the moving and static parts to prevent direct metal contact, thereby reducing friction and wear. Secondly, the lubricating oil also has a cooling effect. In a high temperature environment, when the lubricating oil flows through the bearing, it can take away some heat to prevent the bearing from overheating, thereby preventing the deterioration of the lubricating oil itself. In addition, the lubricating oil can prevent foreign matter from invading the inside of the bearing, prevent rust or corrosion, and protect the normal operation of the bearing.

[0004] Lubricating oil plays a vital role in universal joint bearings, but the lubricating oil tends to gradually leak out during the rotation of the bearing, so that the lubricating oil gradually decreases with the rotation of the bearing. Therefore, in order to prevent the leakage of the lubricating oil, a sealing ring or a sealing gasket is currently set between the sleeve and the shaft for sealing. However, the traditional sealing structure only uses a single-layer sealing ring for sealing, which makes it difficult to improve the sealing effect between the sleeve and the shaft. Summary of the invention

[0005] The object of the present invention is to provide a universal joint bearing with improved sealing effect in view of the defects and shortcomings of the prior art.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a universal joint bearing with improved sealing effect, comprising a connecting shaft body, a shaft rod arranged on the connecting shaft body, a shaft sleeve sleeved on the shaft rod, and a plurality of rollers arranged on the shaft sleeve, wherein the plurality of rollers are in rolling contact with the outer side surface of the shaft rod, and further comprising a shaft oil seal arranged on the peripheral side of the shaft rod and below the shaft sleeve, a sleeve oil seal arranged on the inner peripheral side of the lower end of the shaft sleeve, and a sleeve oil seal arranged on the shaft oil seal for being sleeved on the shaft sleeve. An upper sealing lip which is pressed against the lower surface of the sleeve oil seal when it is arranged on the upper shaft rod, a side sealing lip which is arranged on the circumferential side of the shaft oil seal and is used to be pressed against the inner side surface of the sleeve oil seal when the sleeve is arranged on the upper shaft rod, a face convex ring which is arranged on the upper end surface of the shaft oil seal and is used to be pressed against the lower end surface of the sleeve when the sleeve is arranged on the upper shaft rod, and a sleeve sealing lip which is arranged on the upper end of the sleeve oil seal and is used to be pressed against the side end surface of the shaft rod when the sleeve is arranged on the upper shaft rod. The sleeve oil seal is located above the shaft oil seal, and the sleeve sealing lip is an elastic ring.

[0007] A further improvement is that the shaft oil seal comprises a hard support body and an elastomer arranged outside the hard support body, and the elastomer, the upper sealing lip, the side sealing lip and the face convex ring are integrally formed.

[0008] A further improvement is that the upper sealing lip is arranged on the shaft oil seal to be inclined toward the sleeve oil seal, and the radial inclination angle between the upper sealing lip and the shaft oil seal is 42°-48°.

[0009] A further improvement is that the radial inclination angle between the upper sealing lip and the shaft oil seal is 45°.

[0010] A further improvement is that: at least one side sealing lip is provided, the side sealing lip is inclined on the shaft oil seal, and the radial inclination angle between the side sealing lip and the shaft oil seal is 12°-18°.

[0011] A further improvement is that the radial inclination angle between the side sealing lip and the shaft oil seal is 15°.

[0012] A further improvement is that: there are four face convex rings in total, and the four face convex rings protrude upward on the upper end surface of the shaft oil seal.

[0013] A further improvement is that the surface convex ring is a conical convexity or an arc convexity.

[0014] A further improvement is that the sleeve sealing lip is arranged on the sleeve oil seal in an inclined manner toward the end of the shaft oil seal, and the radial inclination angle between the sleeve sealing lip and the sleeve oil seal is 58°-61°.

[0015] A further improvement is that the radial inclination angle between the sleeve sealing lip and the sleeve oil seal is 60°.

[0016] After adopting the above technical scheme, the beneficial effects of the present invention are as follows: lubricating oil is added to the outer periphery of the shaft rod or several rollers, and then the shaft sleeve is sleeved on the shaft rod. During the sleeve installation process, the side sealing lip is first squeezed against the inner side surface of the sleeve oil seal, thereby sealing the gap between the shaft oil seal circumference and the sleeve oil seal circumference. When the shaft sleeve is completely sleeved on the shaft rod, the upper sealing lip is squeezed against the lower surface of the sleeve oil seal to seal the gap between the shaft oil seal and the sleeve oil seal. The sleeve sealing lip is squeezed against the side end surface of the shaft rod to seal the gap between the sleeve oil seal and the shaft rod. The face convex ring is squeezed against the lower end surface of the shaft sleeve to seal the gap between the lower end surface of the shaft sleeve and the upper surface of the shaft oil seal. The gap between the shaft sleeve and the shaft rod is sealed by the quadruple sealing structure, which can improve the sealing effect between the shaft sleeve and the shaft rod.

[0017] Further effect: If the shaft oil seal is made directly of elastic material, when the shaft sleeve generates pressure on the shaft oil seal, the shaft oil seal as a whole is prone to elastic deformation, which can easily cause the upper sealing lip, side sealing lip, and face convex ring to deform and lose the sealing effect. By setting the support properties of the hard support body and the deformability of the elastomer itself, the shaft oil seal can have support and deformation capabilities to prevent sealing failure.

[0018] Further effect: through the layered sealing structures of the sleeve sealing lip, the upper sealing lip, the side sealing lip and the face convex ring, even if one or two of the sealing structures fail, the gap between the sleeve and the shaft can still be sealed, which can reduce the loss caused by the failure of some sealing structures.

[0019] Further effect: Since the sleeve sealing lip, upper sealing lip, side sealing lip and face convex ring are all made of elastic materials, when the sleeve rotates on the shaft rod through the roller, the sleeve sealing lip, upper sealing lip, side sealing lip and face convex ring can all produce elastic deformation and squeeze and fit on the lower end surface of the shaft rod, sleeve oil seal and sleeve.

[0020] Further effect: The position of the sleeve oil seal can prevent external impurities such as dust, dirt or moisture from entering between the shaft and the sleeve, and the sleeve seal lip contacts the outer diameter surface of the shaft, which can further prevent the infiltration of impurities and also play a sealing effect on the lubricating oil.

[0021] Further effect: After the sleeve is installed on the shaft rod, the lower end face of the sleeve is pressed on the lower ring portion of the shaft oil seal. The contact between the lower ring portion and the lower end face of the sleeve can prevent external dust and dirt from entering through the gap between the sleeve and the shaft rod, and can also prevent water, dust and oil leakage.

[0022] Further effect: Through the layered sealing structure of the sleeve sealing lip, upper sealing lip, side sealing lip and face convex ring, while sealing the lubricating oil, it is more difficult for external impurities such as dust, water, and soil to enter between the shaft and the sleeve, thereby having the effect of blocking external media while taking into account sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2It is a cross-sectional view of the shaft rod and the shaft sleeve of the present invention;

[0026] Figure 3 It corresponds to Figure 2 A magnified view of part A;

[0027] Figure 4 is a cross-sectional view of the shaft oil seal of the present invention;

[0028] Figure 5 It is a cutaway view of the oil seal sleeve in the present invention.

[0029] Explanation of the reference numerals: connecting shaft 1, shaft rod 2, shaft sleeve 3, roller 4, shaft oil seal 5, sleeve oil seal 6, upper sealing lip 7, side sealing lip 8, face convex ring 9, sleeve sealing lip 10, hard supporting body 11, elastic body 12. DETAILED DESCRIPTION

[0030] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0031] See also Figures 1 to 5 As shown, the technical solution adopted in this specific embodiment is: a universal joint bearing with improved sealing effect, including a connecting shaft body 1, a shaft rod 2 arranged on the connecting shaft body 1, a shaft sleeve 3 sleeved on the shaft rod 2, and a plurality of rollers 4 arranged on the shaft sleeve 3, wherein the plurality of rollers 4 are in rolling contact with the outer side surface of the shaft rod 2, and further including a shaft oil seal 5 arranged on the peripheral side of the shaft rod 2 and located below the shaft sleeve 3, a sleeve oil seal 6 arranged on the inner peripheral side of the lower end of the shaft sleeve 3, and a sleeve oil seal 6 arranged on the shaft oil seal 5 for sealing the shaft sleeve 3 when the shaft sleeve 3 is sleeved on the upper shaft rod 2. The upper sealing lip 7 is pressed against the lower surface of the sleeve oil seal 6, the side sealing lip 8 is arranged on the peripheral side of the shaft oil seal 5 and is used to press against the inner side surface of the sleeve oil seal 6 when the sleeve 3 is sleeved on the upper shaft rod 2, the face convex ring 9 is arranged on the upper end surface of the shaft oil seal 5 and is used to press against the lower end surface of the sleeve 3 when the sleeve 3 is sleeved on the upper shaft rod 2, and the sleeve sealing lip 10 is arranged on the upper end of the sleeve oil seal 6 and is used to press against the side end surface of the shaft rod 2 when the sleeve 3 is sleeved on the upper shaft rod 2. The sleeve oil seal 6 is located above the shaft oil seal 5, and the sleeve sealing lip 10 is an elastic ring. The shaft oil seal 5 and the sleeve oil seal 6 are both T-shaped ring blocks. The shaft oil seal 5 is divided into an upper ring part and a lower ring part, the upper sealing lip 7 is arranged at the upper end of the upper ring part, the side sealing lip 8 is arranged on the outer peripheral side of the upper ring part, and the face convex ring 9 is arranged on the upper end surface of the lower ring part. The shaft oil seal 5 is fixedly arranged at the lower end of the shaft rod 2. The sleeve sealing lip 10 is a rubber ring. A spring sheet is provided on the inner circumference of the sleeve 3 at the lower end surface of the roller 4 , the upper end of the spring sheet abuts against the lower end surface of the roller 4 , and the lower end of the spring sheet is fixed on the sleeve oil seal 6 , providing support for the roller 4 through the spring sheet.

[0032] The shaft oil seal 5 includes a hard support body 11, an elastic body 12 arranged outside the hard support body 11, and the elastic body 12, the upper sealing lip 7, the side sealing lip 8, and the face convex ring 9 are integrally formed. The elastic body 12, the upper sealing lip 7, the side sealing lip 8, and the face convex ring 9 are all rubber bodies. The hard support body 11 is metal iron, metal tungsten, or metal titanium. The hard support body 11 and the elastic body 12 are both T-shaped ring bodies.

[0033] The upper sealing lip 7 is inclined on the shaft oil seal 5 (located on the elastic body 12) toward the end of the sleeve oil seal 6, and the radial inclination angle between the upper sealing lip 7 and the shaft oil seal 5 is 42°-48°. Preferably, the radial inclination angle between the upper sealing lip 7 and the shaft oil seal 5 is 45°.

[0034] At least one side sealing lip 8 is provided, and the side sealing lip 8 is tilted on the shaft oil seal 5, and the radial tilt angle between the side sealing lip 8 and the shaft oil seal 5 is 12°-18°. There are two side sealing lips 8, and the two side sealing lips 8 have the same tilt angle and direction, and can be tilted upward or downward, preferably tilted downward. Preferably, the radial tilt angle between the side sealing lip 8 and the shaft oil seal 5 is 15°.

[0035] There are four face convex rings 9, and the four face convex rings 9 protrude upward on the upper end surface of the shaft oil seal 5. The four face convex rings 9 are equidistantly arranged on the upper end surface of the shaft oil seal 5, and the diameters of the four face convex rings 9 gradually increase from the inner diameter to the outer diameter of the shaft oil seal 5, and the value of each increase is equal. Among the four face convex rings 9, the three outer convex rings are in compression contact with the lower end surface of the shaft sleeve 3, and the inner convex ring is in compression contact with the lower end surface of the sleeve oil seal 6. The number of face convex rings 9 can also be one, two or three, and the specific number is not limited, so long as sealing and molding can be achieved. The setting position of the four face convex rings 9 is located below the side sealing lip 8.

[0036] The surface convex ring 9 is a conical convexity or an arc convexity.

[0037] The sleeve sealing lip 10 is inclined on the sleeve oil seal 6 toward the end of the shaft oil seal 5, and the radial inclination angle between the sleeve sealing lip 10 and the sleeve oil seal 6 is 58°-61°. Preferably, the radial inclination angle between the sleeve sealing lip 10 and the sleeve oil seal 6 is 60°.

[0038] The working principle of the present invention is as follows: lubricating oil is added to the outer periphery of the shaft rod 2 or to a plurality of rollers 4, and then the shaft sleeve 3 is sleeved on the shaft rod 2. During the sleeve installation process, the side sealing lip 8 is first pressed against the inner side surface of the sleeve oil seal 6, thereby sealing the gap between the circumference of the shaft oil seal 5 and the circumference of the sleeve oil seal 6. When the shaft sleeve 3 is completely sleeved on the shaft rod 2, the upper sealing lip 7 is pressed against the lower surface of the sleeve oil seal 6 to seal the gap between the shaft oil seal 5 and the sleeve oil seal 6. The sleeve sealing lip 10 is pressed against the side end surface of the shaft rod 2 to seal the gap between the sleeve oil seal 6 and the shaft rod 2. The face convex ring 9 It is squeezed with the lower end surface of the sleeve 3 to seal the gap between the lower end surface of the sleeve 3 and the upper surface of the shaft oil seal 5. The gap between the sleeve 3 and the shaft rod 2 is sealed through the quadruple sealing structure, which can improve the sealing effect between the sleeve 3 and the shaft rod 2. Through the layered sealing structure of the sleeve sealing lip 10, the upper sealing lip 7, the side sealing lip 8 and the face convex ring 9, while sealing the lubricating oil, it is more difficult for external impurities such as dust, water, and soil to enter between the shaft rod 2 and the sleeve 3, thereby having the effect of blocking external media while taking sealing into account.

[0039] The invention is intended to protect the structure of the product. The model of each component is not the content of the invention, and it is also a known technology. Any component on the market that can achieve the above-mentioned function of the invention can be used as a universal joint bearing to improve the sealing effect. Therefore, the model and other parameters of the component are not described in detail in the invention. The contribution of the invention lies in the scientific combination of the components.

[0040] The above shows and describes the basic principles and main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents. Anything not described in detail in the present invention is a well-known technology of those skilled in the art.

Claims

1. A universal joint bearing with improved sealing effect, comprising a connecting shaft, a shaft arranged on the connecting shaft, a sleeve arranged on the shaft, and a plurality of rollers arranged on the sleeve, wherein the plurality of rollers are in rolling contact with the outer side surface of the shaft, and characterized in that: It also includes a shaft oil seal arranged on the circumferential side of the shaft rod and located below the shaft sleeve, a sleeve oil seal arranged on the inner circumferential side of the lower end of the shaft sleeve, an upper sealing lip arranged on the shaft oil seal for being pressed against the lower surface of the sleeve oil seal when the sleeve is sleeved on the upper shaft rod, a side sealing lip arranged on the circumferential side of the shaft oil seal for being pressed against the inner side surface of the sleeve oil seal when the sleeve is sleeved on the upper shaft rod, a face convex ring arranged on the upper end surface of the shaft oil seal for being pressed against the lower end surface of the sleeve when the sleeve is sleeved on the upper shaft rod, and a sleeve sealing lip arranged at the upper end of the sleeve oil seal for being pressed against the side end surface of the shaft rod when the sleeve is sleeved on the upper shaft rod. The sleeve oil seal is located above the shaft oil seal, and the sleeve sealing lip is an elastic ring.

2. A universal joint bearing with improved sealing effect according to claim 1, characterized in that: The shaft oil seal comprises a hard support body and an elastic body arranged outside the hard support body. The elastic body, the upper sealing lip, the side sealing lip and the face convex ring are integrally formed.

3. A universal joint bearing with improved sealing effect according to claim 1, characterized in that: The upper sealing lip is arranged on the shaft oil seal at an angle toward the sleeve oil seal, and the radial inclination angle between the upper sealing lip and the shaft oil seal is 42°-48°.

4. A universal joint bearing with improved sealing effect according to claim 3, characterized in that: The radial inclination angle between the upper sealing lip and the shaft oil seal is 45°.

5. A universal joint bearing with improved sealing effect according to claim 1, characterized in that: At least one side sealing lip is provided, and the side sealing lip is tilted on the shaft oil seal, and the radial tilt angle between the side sealing lip and the shaft oil seal is 12°-18°.

6. A universal joint bearing with improved sealing effect according to claim 5, characterized in that: The radial inclination angle between the side sealing lip and the shaft oil seal is 15°.

7. A universal joint bearing with improved sealing effect according to claim 1, characterized in that: There are four face convex rings in total, and the four face convex rings protrude upward on the upper end surface of the shaft oil seal.

8. A universal joint bearing with improved sealing effect according to claim 1 or 7, characterized in that: The surface convex ring is a conical convexity or an arc convexity.

9. A universal joint bearing with improved sealing effect according to claim 1, characterized in that: The sleeve sealing lip is arranged on the sleeve oil seal at an angle toward the shaft oil seal end, and the radial inclination angle between the sleeve sealing lip and the sleeve oil seal is 58°-61°.

10. A universal joint bearing with improved sealing effect according to claim 9, characterized in that: The radial inclination angle between the sleeve sealing lip and the sleeve oil seal is 60°.

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