A long-life spherical unit bearing

Abstract

The present invention relates to a long-life spherical bearing with a housing. A sealing groove is provided on one side of the spherical groove in the bearing housing. The sealing groove and the spherical outer side of the spherical bearing are sealed by sleeving a sealing ring in the sealing groove. Lubricating oil enters the accommodating cavity formed by the sealing groove from the oil injection channel at the upper end of the bearing housing, and then enters the bearing interior from the oil inlet channel at the upper end of the spherical bearing. When the lubricating oil enters the sealing groove, it can ensure sealing and will not leak from the joint between the spherical bearing and the bearing housing, and there will be no problems such as difficult lubricating oil injection or inability to inject lubricating oil. When an excessive amount of lubricating oil is injected into the spherical bearing, resulting in an increase in internal pressure, a part of the lubricating oil will enter the overflow valve through the pressure relief channel and the oil discharge channel and be discharged from the overflow valve, maintaining the spherical bearing within a safe pressure range. There will be no problem that the sealing effect of the bearing sealing ring deteriorates due to excessive pressure, nor will there be a problem that the lubricating oil overflows from the sealing ring.

Description

Technical Field

[0001] The present invention relates to the technical field of sealed bearings, and particularly to a long-life spherical bearing with a housing. Background Art

[0002] The surface of the outer ring of a spherical bearing is similar to a spherical surface, and the side wall of the assembly hole of the corresponding bearing housing is provided as a concave spherical surface. The spherical bearing is fitted into the bearing housing to form a spherical fit. There is an automatic centering function between the spherical bearing and the bearing housing, and it is easy to install, has a large load capacity, excellent sealing performance, and can work in a harsh environment. During the use of a spherical bearing, it is necessary to ensure good lubrication inside. The quality of lubrication is directly related to the service life and performance of the spherical bearing. The outer ring of the existing spherical bearing is provided with an oil inlet hole, and an annular oil groove is provided along the circumferential direction in the assembly hole of the bearing housing. The lubricating oil is injected into the annular oil groove through the oil inlet channel on the bearing housing, and then flows from the annular oil groove into the oil inlet hole, and thus enters the spherical bearing. The disadvantages of this oil injection structure are as follows: First, after the spherical bearing is used for a long time, the sealing performance between the annular oil groove and the spherical bearing becomes poor, and the lubricating oil injected into the annular oil groove will overflow from the joint between the annular oil groove and the spherical surface of the spherical bearing. Only a small amount of lubricating oil enters the spherical bearing through the oil inlet hole, resulting in difficult injection of lubricating oil or even inability to inject. Second, the spherical bearing is sealed inside by the sealing rings on both sides. When injecting lubricating oil, it is very difficult to accurately control the injection amount, and often due to excessive injection of lubricating oil, the internal pressure increases, resulting in a poor sealing effect of the sealing rings or even overflow of lubricating oil from the sealing rings. The above defects will seriously reduce the performance and service life of the spherical bearing. Summary of the Invention

[0003] In order to solve the above problems, the present invention proposes a long-life spherical bearing with a housing.

[0004] The technical solution of the present invention is: A long-life spherical bearing with a housing, including a bearing housing and a spherical bearing installed in the assembly hole of the bearing housing, characterized in that:

[0005] A spherical groove is provided along the circumferential direction on the side wall of the installation hole, and the spherical outer side surface of the outer ring of the spherical bearing is fitted into the spherical groove. A lubricating oil injection channel penetrating through to the assembly hole is provided along the radial direction in the middle of the outer side surface at the upper end of the bearing housing, and a lubricating oil drainage channel penetrating through to the assembly hole is provided along the radial direction in the middle of the outer side surface at the lower end of the bearing housing. The outlets of the lubricating oil injection channel and the lubricating oil drainage channel are both located outside the spherical groove. Sealing grooves are provided at the upper end and the lower end of the spherical groove, and sealing rings are fitted into the sealing grooves. The sealing rings are pressed between the bottom surface of the sealing groove and the spherical outer side surface of the spherical bearing. The lower port of the lubricating oil injection channel is located exactly in the middle of the upper sealing ring, and the upper port of the lubricating oil drainage channel is located exactly in the middle of the lower sealing ring;

[0006] On the spherical outer side surface at the upper end of the outer ring of the spherical bearing, an oil inlet passage penetrating the outer ring is provided radially, and on the spherical outer side surface at the lower end, a pressure relief passage penetrating the outer ring is provided radially. Both the oil inlet passage and the pressure relief passage are located outside the balls. The inlet of the oil inlet passage is located in the middle of the upper sealing ring, the outlet of the pressure relief passage is located in the middle of the lower sealing ring, and an overflow valve is installed at the outlet of the oil drain passage.

[0007] Preferably, the sealing groove is provided as a circular groove with a certain curvature, and the curvature of this circular groove is the same as the curvature in the circumferential direction of the spherical groove, and the sealing ring is correspondingly provided as circular.

[0008] Preferably, the sealing groove is provided as an elliptical groove with a certain curvature, and the curvature of this elliptical groove is the same as the curvature in the circumferential direction of the spherical groove, and the sealing ring is correspondingly provided as elliptical.

[0009] Preferably, the major axis direction of the elliptical groove is consistent with the circumferential direction of the spherical groove.

[0010] Preferably, the sealing groove is provided as an inclined sealing groove with a certain slope, and the inclination angle of this inclined sealing groove is the same as the inclination angle of the corresponding spherical groove on the side.

[0011] Preferably, two oil inlet passages are provided, and the upper ports of the two oil inlet passages are both located within the upper sealing ring.

[0012] Preferably, two pressure relief passages are provided, and the outlets of the two pressure relief passages are both located within the lower sealing ring.

[0013] Preferably, two square notches entering the spherical groove are symmetrically provided on both sides of the inner end of the bearing housing, and the size of the sealing groove is smaller than the size of this square notch.

[0014] Preferably, a limiting convex head is provided on the spherical outer side surface of the outer ring of the spherical bearing, and this limiting convex head is located within the square notch on one side.

[0015] The beneficial technical effects of the present invention are:

[0016] On one side of the spherical groove within the bearing housing of the present invention, a sealing groove is provided. By fitting a sealing ring into the sealing groove, the space between the sealing groove and the spherical outer side surface of the spherical bearing is sealed. Lubricating oil enters the accommodating cavity formed by the sealing groove from the oil injection passage at the upper end of the bearing housing, and then enters the bearing interior from the oil inlet passage at the upper end of the spherical bearing. When the lubricating oil enters the sealing groove, it can ensure sealing and will not leak from the joint between the spherical bearing and the bearing housing. The injected lubricating oil can smoothly enter the bearing interior from the oil inlet passage, and there will be no problems such as difficult lubricating oil injection or inability to inject lubricating oil, which can ensure that a sufficient amount of lubricating oil is injected into the bearing to guarantee the lubrication effect.

[0017] The lower end of the bearing housing of the present invention is provided with an oil discharge channel, an overflow valve is provided at the outer port of the oil discharge channel, and a pressure relief channel is provided at the lower end of the spherical bearing. The pressure relief channel and the oil discharge channel are also sealed by means of a sealing groove and a sealing ring. When an excessive amount of lubricating oil is injected into the spherical bearing, resulting in an increase in internal pressure, a part of the lubricating oil will enter the overflow valve from the pressure relief channel and the oil discharge channel and be discharged from the overflow valve, maintaining the spherical bearing within a safe pressure range. There will be no problem of the sealing effect of the bearing sealing ring deteriorating due to excessive pressure, nor will there be a problem of lubricating oil overflowing from the sealing ring.

[0018] The present invention can easily inject a sufficient amount of lubricating oil into the spherical bearing and can maintain the safe pressure within the spherical bearing, greatly improving the performance and service life of the spherical bearing, and having a good usage effect. Brief Description of the Drawings

[0019] Figure 1 is a three-dimensional structural schematic diagram of one side of the present invention;

[0020] Figure 2 is Figure 1 a top view structural schematic diagram of

[0021] Figure 3 is Figure 2 a sectional view taken along the A-A direction of

[0022] Figure 4 is Figure 3 a sectional view taken along the B-B direction of

[0023] Figure 5 is Figure 4 a partial enlarged view of

[0024] Figure 6 is at Figure 5 a structural schematic diagram after forming an annular sealing groove by setting a boss in the sealing groove in

[0025] Figure 7 is a front view structural schematic diagram of the other side of the present invention;

[0026] Figure 8 is one of the three-dimensional structural schematic diagrams of the bearing housing of the present invention;

[0027] Figure 9 is another three-dimensional structural schematic diagram of the bearing housing of the present invention;

[0028] Figure 10 is yet another three-dimensional structural schematic diagram of the bearing housing of the present invention;

[0029] Figure 11 a three-dimensional structural schematic diagram of the bearing housing of the present invention after being cut in half from the middle;

[0030] Figure 12 This is a three-dimensional structural schematic diagram of the spherical bearing of the present invention.

[0031] In the figure, 01. Bearing housing, 11. Spherical groove, 111. Sealing groove, 12. Oil injection channel, 13. Oil drainage channel, 14. Oil injection joint, 15. Square notch, 02. Spherical bearing, 21. Outer ring, 211. Spherical outer side surface, 212. Oil inlet channel, 213. Pressure relief channel, 214. Limit projection, 215. Ball, 22. Inner ring, 31. Sealing ring, 32. Relief valve, 33. Bearing sealing ring, 41. Boss, 42. Annular sealing groove. Detailed implementation mode

[0032] Example 1, referring to the attached drawings of the specification Figure 1 FIGS. 5, 7-12, a long-life ball bearing with a seat, comprising a bearing housing and a spherical bearing installed in the assembly hole of the bearing housing. Two bearing sealing rings are symmetrically arranged on both sides of the spherical bearing to form a sealing structure inside the spherical bearing. The side wall of the installation hole is provided with a spherical groove along the circumferential direction. The spherical outer side surface of the outer ring of the spherical bearing is fitted into the spherical groove. The middle of the outer side surface at the upper end of the bearing housing is provided with an oil injection channel penetrating through to the assembly hole along the radial direction. An oil injection joint is provided at the upper end of the oil injection channel. The middle of the outer side surface at the lower end is provided with an oil drainage channel penetrating through to the assembly hole along the radial direction. The outlets of the oil injection channel and the oil drainage channel are both located outside the spherical groove. Sealing grooves are provided at the upper end and the lower end of the spherical groove. A sealing ring is fitted into the sealing groove. The sealing ring is made of a high-strength rubber sealing ring and can be pasted in the sealing groove. The sealing ring is pressed between the bottom surface of the sealing groove and the spherical outer side surface of the spherical bearing to form a closed chamber between the spherical bearing and the sealing groove. The sealing ring protrudes from the sealing groove. When the spherical bearing swings or rotates slightly in the bearing housing, it can still be in a pressed state to ensure the sealing effect. The lower port of the oil injection channel is located exactly in the middle of the upper sealing ring, and the upper port of the oil drainage channel is located exactly in the middle of the lower sealing ring;

[0033] An oil inlet channel penetrating through the outer ring is provided along the radial direction on the spherical outer side surface at the upper end of the outer ring of the spherical bearing, and a pressure relief channel penetrating through the outer ring is provided along the radial direction on the spherical outer side surface at the lower end. The oil inlet channel and the pressure relief channel are both located outside the balls. Therefore, the balls will not block the lubricating oil from entering the spherical bearing. At the same time, the ports of the oil inlet channel and the pressure relief channel can also be staggered from the rolling surfaces of the balls to avoid the balls passing through the ports of the two channels during the rolling process, which will not block the normal rolling of the balls and will not increase the friction during the rolling process of the balls. The inlet of the oil inlet channel is located in the middle of the upper sealing ring, and the outlet of the pressure relief channel is located in the middle of the lower sealing ring. An overflow valve is installed at the outlet of the oil drainage channel. The overflow valve is used to discharge the excessive injected lubricating oil to maintain the internal pressure within a safe range; The balls are installed between the outer ring and the inner ring of the spherical bearing.

[0034] The sealing groove is set as a circular groove with a certain radian, and the radian of this circular groove is the same as the radian in the circumferential direction of the spherical groove. The sealing ring is correspondingly set as circular. After the circular sealing ring is pressed between the circular groove and the spherical outer side surface of the spherical bearing, the circular sealing ring can be bent and deformed accordingly and is evenly pressed between the spherical outer side surface and the circular groove, with good sealing effect.

[0035] The sealing groove can also be set as an elliptical groove with a certain radian, and the radian of this elliptical groove is the same as the radian in the circumferential direction of the spherical groove. The sealing ring is correspondingly set as elliptical. After the elliptical sealing ring is pressed between the elliptical groove and the spherical outer side surface of the spherical bearing, the elliptical sealing ring can be bent and deformed accordingly and is evenly pressed between the spherical outer side surface and the elliptical groove, with good sealing effect.

[0036] Set the major axis direction of the elliptical groove to be the same as the circumferential direction of the spherical groove. Since the width of the spherical groove in the bearing housing is limited, this direction setting of the elliptical groove can extend the dimension in the circumferential direction and reduce the dimension in the width direction, ensuring that the elliptical groove can be completely arranged in the spherical groove.

[0037] The sealing groove is set as an inclined sealing groove with a certain slope, and the inclination angle of this inclined sealing groove is the same as the inclination angle of the corresponding side spherical groove. See Figure 5 , since the spherical outer side surface at the oil inlet passage of the spherical bearing is an inclined surface with a radian, after the sealing groove is set as an inclined sealing groove with a certain slope, the internal sealing ring inclines accordingly. Therefore, the two sides of the sealing ring will not show a situation of one high and one low relative to the spherical outer side surface of the spherical bearing, and the sealing ring can be evenly attached to the spherical outer side surface of the spherical bearing, with good sealing effect.

[0038] The oil injection channels and the oil inlet channels are both symmetrically set as two. The lower ports of the two oil injection channels are both located inside the upper sealing ring, and the upper ports of the two oil inlet channels are both located inside the upper sealing ring. Therefore, lubricating oil can be injected into the spherical bearing from the two channels simultaneously, with higher injection efficiency.

[0039] The oil drain channels and the pressure relief channels are both symmetrically set as two. The outlets of the two pressure relief channels are both located inside the lower sealing ring, and the inlets of the two oil drain channels are both located inside the lower sealing ring. Therefore, pressure can be relieved simultaneously from the two pressure relief channels, and the excessive lubricating oil inside can be quickly drained.

[0040] On both sides of the inner end of the bearing housing, two square notches are symmetrically provided and enter the spherical groove. The size of the square notches matches the width of the spherical bearing. The spherical bearing is installed into the spherical groove of the bearing housing through these two square notches. A limiting convex head is provided on the spherical outer side of the outer ring of the spherical bearing, and this limiting convex head is located in the square notch on one side. When the spherical bearing rotates in the bearing housing, the limiting convex head can play a limiting role and control the rotation amount of the spherical bearing within the size range of the square notch. The size of the sealing groove is smaller than that of the square notch. When the spherical bearing rotates to the limit, the upper port of the oil inlet channel and the lower port of the pressure relief channel will not slip out of the sealing range of the sealing ring, ensuring continuous sealing.

[0041] The usage process and principle of the present invention are as follows:

[0042] When injecting lubricating oil into the spherical bearing, the lubricating oil enters the accommodating cavity formed by the sealing groove from the oil injection channel at the upper end of the bearing housing, and then enters the bearing interior from the oil inlet channel at the upper end of the spherical bearing. The lubricating oil entering the sealing groove can ensure sealing and will not leak from the joint between the spherical bearing and the bearing housing. The injected lubricating oil can smoothly enter the bearing interior from the oil inlet channel, and there will be no problems such as difficult lubricating oil injection or inability to inject lubricating oil, which can ensure sufficient lubricating oil is injected into the bearing to ensure the lubrication effect; when the internal pressure of the spherical bearing increases due to excessive injected lubricating oil, a part of the lubricating oil will enter the overflow valve through the pressure relief channel and the oil drain channel and be discharged from the overflow valve, maintaining the spherical bearing within a safe pressure range, and there will be no problem that the sealing effect of the bearing sealing ring becomes poor due to excessive pressure, nor will there be a problem that the lubricating oil overflows from the sealing ring.

[0043] Embodiment 2, see the attached drawings of the specification Figures 1-12 , the structure of this embodiment is basically the same as that of Embodiment 1. The difference is that a convex platform with the same shape as it is provided in the middle of the sealing groove. An annular sealing groove is formed between the convex platform and the side wall of the sealing groove, and the sealing ring is fitted into the annular sealing groove. The supporting effect of the annular sealing groove makes the stability and sealing performance of the sealing ring better.

Claims

1. A long-life spherical bearing with a housing, comprising a bearing housing and a spherical bearing installed in the assembly hole of the bearing housing, characterized in that: A spherical groove is provided on the side wall of the installation hole along the circumferential direction, and the spherical outer side surface of the outer ring of the spherical bearing is fitted into the spherical groove. An oil injection channel penetrating through to the assembly hole is provided in the middle of the outer side surface of the upper end of the bearing housing along the radial direction, and an oil discharge channel penetrating through to the assembly hole is provided in the middle of the outer side surface of the lower end along the radial direction. The outlets of the oil injection channel and the oil discharge channel are both located outside the spherical groove. Sealing grooves are provided at both the upper end and the lower end of the spherical groove, and sealing rings are fitted into the sealing grooves. The sealing rings are pressed between the bottom surface of the sealing groove and the spherical outer side surface of the spherical bearing. The lower port of the oil injection channel is located exactly in the middle of the upper sealing ring, and the upper port of the oil discharge channel is located exactly in the middle of the lower sealing ring; An oil inlet channel penetrating through the outer ring is provided on the spherical outer side surface of the upper end of the outer ring of the spherical bearing along the radial direction, and a pressure relief channel penetrating through the outer ring is provided on the spherical outer side surface of the lower end along the radial direction. The oil inlet channel and the pressure relief channel are both located outside the rolling balls. The inlet of the oil inlet channel is located in the middle of the upper sealing ring, and the outlet of the pressure relief channel is located in the middle of the lower sealing ring. An overflow valve is installed at the outlet of the oil discharge channel; The sealing groove is set as an elliptical groove with a certain arc, and the arc of the elliptical groove is the same as the arc in the circumferential direction of the spherical groove. The sealing ring is correspondingly set as an ellipse, and the long axis direction of the elliptical groove is the same as the circumferential direction of the spherical groove.

2. The long-life spherical bearing with housing according to claim 1, characterized in that: The sealing groove is set as a circular groove with a certain arc, and the arc of the circular groove is the same as the arc in the circumferential direction of the spherical groove. The sealing ring is correspondingly set as a circle.

3. The long-life spherical bearing with housing according to claim 1, wherein: The sealing groove is set as an inclined sealing groove with a certain slope, and the inclination angle of the inclined sealing groove is the same as the inclination angle of the corresponding side spherical groove.

4. A long-life spherical roller bearing with housing according to claim 1, characterized in that: Two oil inlet channels are provided, and the upper ports of the two oil inlet channels are both located within the upper sealing ring.

5. A long-life spherical bearing with a housing, as claimed in claim 1, characterized in that: Two pressure relief channels are provided, and the outlets of the two pressure relief channels are both located within the lower sealing ring.

6. A long-life spherical seated bearing according to claim 1, characterized in that: Two square notches entering the spherical groove are symmetrically provided on both sides of the inner end of the bearing housing, and the size of the sealing groove is smaller than the size of the square notch.

7. The long-life spherical bearing with housing according to claim 6, characterized in that: A limit convex head is provided on the spherical outer side surface of the outer ring of the spherical bearing, and the limit convex head is located within the square notch on one side.

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