Universal joint bearing capable of improving sealing effect

Abstract

The utility model provides a universal joint bearing capable of improving the sealing effect, which comprises 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 rolling shafts arranged on the shaft sleeve, and the plurality of rolling shafts are in rolling contact with the outer side surface of the shaft rod. The shaft oil seal is arranged on the peripheral side of the shaft rod and located below the shaft sleeve, the sleeve oil seal is arranged on the inner peripheral side of the lower end of the shaft sleeve, the upper sealing lip is arranged on the shaft oil seal, the face protruding ring is arranged on the upper end face of the shaft oil seal, the sleeve sealing lip is arranged at the upper end of the sleeve oil seal, and 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 utility model relates to the technical field of universal joint bearings, in particular to a universal joint bearing with improved sealing effect. Background Art

[0002] Universal joint bearings, a mechanical structure that uses a spherical connection to transmit power between different shafts, are a crucial component in 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, preventing 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, preventing 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 interior 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. However, during the rotation of the bearing, the lubricating oil tends to gradually leak outward, so that the lubricating oil gradually decreases as the bearing rotates. Therefore, in order to prevent the leakage of lubricating oil, a sealing ring or a sealing gasket is currently provided between the sleeve and the shaft for sealing. However, the traditional sealing structure only uses a single layer of sealing ring for sealing, which makes it difficult to improve the sealing effect between the sleeve and the shaft. Utility Model Content

[0005] The purpose of the utility model 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 utility model adopts the following technical solutions: 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 also comprising a shaft oil seal arranged on the circumferential side of the shaft rod and below the shaft sleeve, a sleeve oil seal arranged on the inner circumferential side of the lower end of the sleeve, an upper sealing lip arranged on the shaft oil seal for being squeezed against the lower 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 face of the shaft oil seal for being squeezed against the lower end face 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 squeezed against the side end face 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.

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

[0008] A further improvement is that the upper sealing lip is arranged on the shaft oil seal in an inclined manner toward the sleeve oil seal end, 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: there are four surface convex rings in total, and the four surface convex rings protrude upward on the upper end surface of the shaft oil seal.

[0011] A further improvement is that the surface convex ring is a conical convexity or an arc convexity.

[0012] A further improvement is that the sleeve sealing lip is arranged on the sleeve oil seal in an inclined manner toward the shaft oil seal end, and the radial inclination angle between the sleeve sealing lip and the sleeve oil seal is 58°-61°.

[0013] A further improvement is that the radial inclination angle between the sleeve sealing lip and the sleeve oil seal is 60°.

[0014] After adopting the above technical scheme, the beneficial effects of the utility model 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. 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 face of the shaft rod to seal the gap between the sleeve oil seal and the shaft rod, the surface convex ring is squeezed against the lower end face of the shaft sleeve to seal the gap between the lower end face of the shaft sleeve and the upper surface of the shaft oil seal, and the gap between the shaft sleeve and the shaft rod is sealed through the triple sealing structure, which can improve the sealing effect between the shaft sleeve and the shaft rod.

[0015] 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 and the 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, thereby preventing the phenomenon of sealing failure.

[0016] Further effect: through the layered sealing structures of the sleeve sealing lip, the upper 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.

[0017] Further effect: Since the sleeve sealing lip, the upper sealing lip and the surface convex ring are all made of elastic materials, when the sleeve rotates on the shaft through the roller, the sleeve sealing lip, the upper sealing lip and the surface convex ring can all produce elastic deformation and be squeezed and fitted on the shaft, the sleeve oil seal and the lower end surface of the sleeve.

[0018] Further effect: The position of the oil seal can prevent external impurities such as dust, dirt or moisture from entering between the shaft and the sleeve, and the contact between the sleeve sealing lip and the outer diameter surface of the shaft can further prevent the infiltration of impurities and also have a sealing effect on the lubricating oil.

[0019] Further effect: After the sleeve is installed on the shaft rod, the lower end face of the sleeve is pressed on the lower ring part of the shaft oil seal. The contact between the lower ring part 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.

[0020] Further effect: Through the layered sealing structure of the sleeve sealing lip, the upper sealing lip and the face convex ring, while sealing the lubricating oil, it increases the difficulty of external dust, water, soil and other impurities entering between the shaft and the sleeve, thereby having the effect of blocking external media while taking into account sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative labor.

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Figure 2 It is a cross-sectional view of the central shaft and the shaft sleeve of the utility model;

[0024] Figure 3 It corresponds to Figure 2 A magnified view of part A;

[0025] Figure 4 This is a cross-sectional view of the central shaft oil seal of the utility model;

[0026] Figure 5 It is a cross-sectional view of the middle oil seal of the utility model.

[0027] Explanation of the reference numerals: connecting shaft 1, shaft rod 2, 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 support body 11, elastic body 12. DETAILED DESCRIPTION

[0028] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0029] See 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 set on the connecting shaft body 1, a shaft sleeve 3 sleeved on the shaft rod 2, and a plurality of rollers 4 set 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 set on the circumference of the shaft rod 2 and below the shaft sleeve 3, a sleeve oil seal 6 set on the inner circumference of the lower end of the shaft sleeve 3, and a 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 presses against the lower surface of the sleeve oil seal 6; the side sealing lips 8, located around the shaft oil seal 5, press against the inner surface of the sleeve oil seal 6 when the shaft sleeve 3 is mounted on the upper shaft 2; the raised face ring 9, located on the upper end surface of the shaft oil seal 5, presses against the lower end surface of the shaft sleeve 3 when the shaft sleeve 3 is mounted on the upper shaft 2; and the sleeve sealing lip 10, located on the upper end of the sleeve oil seal 6, presses against the side end surface of the shaft shaft 2 when the shaft sleeve 3 is mounted on the upper shaft 2. The sleeve oil seal 6 is located above the shaft oil seal 5, and the sleeve sealing lip 10 is an elastic ring. Both the shaft oil seal 5 and the sleeve oil seal 6 are T-shaped ring blocks. The shaft oil seal 5 consists of an upper ring portion and a lower ring portion. The upper sealing lip 7 is located at the upper end of the upper ring portion, the side sealing lips 8 are located on the outer circumference of the upper ring portion, and the raised face ring 9 is located on the upper end surface of the lower ring portion. The shaft oil seal 5 is fixed to the lower end of the shaft shaft 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 to the sleeve oil seal 6, providing support for the roller 4 through the spring sheet.

[0030] The shaft oil seal 5 comprises a rigid support body 11 and an elastic body 12 positioned outside the rigid support body 11. The elastic body 12, upper sealing lip 7, side sealing lips 8, and raised face ring 9 are integrally formed. The elastic body 12, upper sealing lip 7, side sealing lips 8, and raised face ring 9 are all rubber. The rigid support body 11 is made of metal iron, tungsten, or titanium. Both the rigid support body 11 and the elastic body 12 are T-shaped rings.

[0031] The upper sealing lip 7 is tilted on the shaft oil seal 5 (located on the elastomer 12) toward the sleeve oil seal 6, and the radial tilt angle between the upper sealing lip 7 and the shaft oil seal 5 is 42°-48°. Preferably, the radial tilt angle between the upper sealing lip 7 and the shaft oil seal 5 is 45°.

[0032] At least one side sealing lip 8 is provided, tilted on the shaft oil seal 5. 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, each with the same tilt angle and direction. They can be tilted upward or downward, preferably downward. Preferably, the radial tilt angle between the side sealing lip 8 and the shaft oil seal 5 is 15°.

[0033] 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 extrusion contact with the lower end surface of the shaft sleeve 3, and the inner convex ring is in extrusion 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. There is no limit to the specific number, so long as sealing and forming can be achieved. The setting position of the four face convex rings 9 is located below the side sealing lip 8.

[0034] The surface convex ring 9 is a conical convexity or an arc convexity.

[0035] The sleeve sealing lip 10 is tilted on the sleeve oil seal 6 toward the shaft oil seal 5, and the radial tilt angle between the sleeve sealing lip 10 and the sleeve oil seal 6 is 58°-61°. Preferably, the radial tilt angle between the sleeve sealing lip 10 and the sleeve oil seal 6 is 60°.

[0036] The working principle of the present invention is as follows: Lubricating oil is added to the outer periphery of the shaft rod 2 or several 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 squeezed with the inner side 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 squeezed with 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 squeezed with the side end face of the shaft rod 2 to seal the gap between the sleeve oil seal 6 and the shaft rod 2. The convex ring 9 is squeezed with the lower end surface of the shaft sleeve 3 to seal the gap between the lower end surface of the shaft sleeve 3 and the upper surface of the shaft oil seal 5. The gap between the shaft sleeve 3 and the shaft rod 2 is sealed by the quadruple sealing structure, which can improve the sealing effect between the shaft sleeve 3 and the shaft rod 2. 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 can seal the lubricating oil while increasing the difficulty of external dust, water, soil and other impurities entering between the shaft rod 2 and the shaft sleeve 3, thereby having the effect of blocking external media while taking into account sealing.

[0037] This utility model protects the product's structure; the component models are not the subject of this utility model protection and are generally known technology. Any commercially available component that can achieve the aforementioned functions of this utility model can be used as a universal joint bearing with enhanced sealing performance. Therefore, component models and other parameters are not described in detail in this utility model. The contribution of this utility model lies in the scientific combination of the components.

[0038] The above shows and describes the basic principles, 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 illustrative purposes. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements shall fall within the scope of the present invention as claimed. The scope of protection claimed in the present invention shall be defined by the appended claims and their equivalents. Any details not described in the present invention are well known to those skilled in the art.

Claims

1. A universal joint bearing with improved sealing effect, comprising a connecting shaft, a shaft disposed on the connecting shaft, a sleeve sleeved on the shaft, and a plurality of rollers disposed on the sleeve, wherein the plurality of rollers are in rolling contact with an outer side surface of the shaft, characterized in that: The cam is provided on the upper end of the shaft oil seal and is used to press against the lower end surface of the sleeve when the sleeve is sleeved on the upper shaft rod; the cam is provided on the upper end surface of the shaft oil seal and is used to press against the lower end surface of the sleeve when the sleeve is sleeved on the upper shaft rod; the cam is provided on the upper end surface of the shaft oil seal and is used to press against the lower end surface of the sleeve when the sleeve is sleeved on the upper shaft rod; the cam is provided on the upper end surface of the sleeve oil seal and is used to press against the side end surface of the shaft rod when the sleeve is sleeved on the upper shaft rod; the cam is provided on the upper end of the sleeve oil seal and is used to press against the side end surface of the shaft rod when the sleeve is sleeved on the upper shaft rod; the cam is located above the shaft oil seal and the cam is an elastic ring.

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

3. The 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. The 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.

6. A universal joint bearing with improved sealing effect according to claim 1 or 5, characterized in that: The surface convex ring is a conical convexity or an arc convexity.

7. The 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°.

8. The universal joint bearing with improved sealing effect according to claim 7, characterized in that: The radial inclination angle between the sleeve sealing lip and the sleeve oil seal is 60°.

Images