Self-lubricating dustproof bearing seat

Abstract

The invention relates to the technical field of bearing seats, and discloses a self-lubricating dustproof bearing seat which comprises an upper end cover, a lower end cover hinged to the lower portion of the upper end cover, a self-lubricating mechanism and a dustproof sealing ring which are arranged in the upper end cover and the lower end cover, a shaft sleeve arranged in the self-lubricating mechanism, and a shaft core movably installed in the shaft sleeve and the dustproof sealing ring. The self-lubricating mechanism comprises an external backflow assembly rotationally connected to the inner wall of the upper end cover and the inner wall of the lower end cover and an internal backflow assembly rotationally connected to the outer wall of the shaft sleeve, a reasonable lubricating channel path is obtained through the arranged oil storage assembly, the movable assembly and the rolling assembly, it is ensured that a lubricating agent can evenly and smoothly reach all lubricating points, and the lubricating efficiency is improved. Lubricating oil in the oil storage cavity flows into the oil outlet pipe through the oil outlet groove and then flows into the oil guide groove, so that the contact faces of the rolling wheel and the bearing outer ring and the bearing inner ring are lubricated, and the effect of improving the overall operation quality and reliability of equipment is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of bearing seats, and in particular to a self-lubricating dustproof bearing seat. Background Art

[0002] The self-lubricating dustproof bearing seat is a bearing assembly that integrates self-lubricating function and dustproof design. It is suitable for harsh working environments, such as mines, construction and chemical industries where dust or corrosive media exist. Through the built-in self-lubricating system and sealed dustproof structure, the bearing seat can significantly reduce the maintenance frequency, extend the service life of the bearing, and ensure the continuity and reliability of equipment operation. The self-lubricating system can automatically provide lubrication for the bearing, and the dustproof structure can effectively block the invasion of external dust and impurities. It is a key component for friction reduction and protection of modern industrial machinery.

[0003] A dustproof self-lubricating bearing seat is disclosed in the patent publication number CN215805808U, including a base, a top seat is installed on the upper end of the base, a bearing body is installed between the base and the top seat, a driving mechanism is installed on the inner ring of the bearing body, mounting rings are installed at the front end of the base and the front end of the top seat and at the rear end of the base and the rear end of the top seat, outer surfaces of the two mounting rings are installed with shrouds, baffles are installed on the outer surfaces of the two shrouds, pillars are installed on the left parts of the outer cylindrical surfaces of the two shrouds, lubrication mechanisms and pressurization mechanisms are respectively installed at the upper ends of the two pillars, the lubrication mechanisms and pressurization mechanisms are respectively connected with the two shrouds through the connection, and a No. 1 oil pipeline is installed on the outer cylindrical surface of the lubrication mechanism.

[0004] The prior art has the following defects:

[0005] Poor lubrication effect: There are many friction surfaces in the bearing seat, which are generally mainly present in the contact surface between the inner ring of the bearing and the shaft, the contact surface between the outer ring of the bearing and the bearing seat, and the contact surface between the roller (or ball, roller) and the inner and outer rings. The lubricant in the self-lubricating bearing seat gradually penetrates into the friction surface through capillary action or pressure difference to provide continuous lubrication. Unlike externally added lubricants, the flow rate of the lubricant is small and the release is slow, and it cannot reach each friction surface in time. Therefore, it is necessary to set up a reasonable lubrication channel path to ensure that the lubricant can reach each lubrication point evenly and smoothly, and increase the lubricant distribution points inside the bearing seat to ensure that the lubricant can evenly cover all surfaces that need lubrication, so as to improve the overall operation quality and reliability of the equipment.

[0006] Unable to achieve automatic oil return well: the existing oil return methods generally include gravity oil return and pressure oil return. Gravity oil return is to design an oil collecting tank under the bearing seat. After use, the lubricant flows into the oil collecting tank by gravity and then returns to the oil storage tank through the pipeline. This method has a long oil return path, slow oil return, and is not suitable for equipment that changes orientation; pressure oil return is to install a pressure pump and pipeline inside or outside the bearing seat to form a complete pressure oil return system. Although this method has a fast oil return speed, it requires additional pumps, pipelines, filters and control systems, which increases the complexity of the system; therefore, it is necessary to set up a device that can automatically return oil in any orientation under the action of gravity, and reduce the oil return pipeline, so that the lubricant reduces the resistance encountered during the oil return process, so as to improve the reliability and service life of the equipment. Summary of the invention

[0007] In view of the problems in the prior art such as poor lubrication effect and inability to achieve automatic oil return, a self-lubricating dustproof bearing seat is proposed.

[0008] The present application provides a self-lubricating dustproof bearing seat, the purpose of which is: by setting an oil storage component and a rolling component, a reasonable lubrication channel path is provided to ensure that the lubricant can reach each lubrication point evenly and smoothly, so as to improve the overall operation quality and reliability of the equipment; by setting an external reflux component and an internal reflux component, the oil can be automatically returned in any direction under the action of gravity, and the oil return pipeline is reduced, so that the resistance encountered by the lubricant during the oil return process is reduced, so as to improve the reliability and service life of the equipment.

[0009] The technical solution of the present invention is: a self-lubricating dustproof bearing seat, comprising an upper end cover, a lower end cover hinged below the upper end cover, a self-lubricating mechanism and a dustproof sealing ring arranged inside the upper end cover and the lower end cover, a shaft sleeve arranged inside the self-lubricating mechanism, and a shaft core movably installed inside the shaft sleeve and the dustproof sealing ring, the self-lubricating mechanism comprises an external reflux component rotatably connected to the inner walls of the upper end cover and the lower end cover, an internal reflux component rotatably connected to the outer wall of the shaft sleeve, and a plurality of rolling components rotatably connected between the external reflux component and the internal reflux component, the external reflux component comprises a bearing outer ring rotatably connected to the inner walls of the upper end cover and the lower end cover, the internal reflux component comprises a bearing inner ring rotatably connected to the outer wall of the shaft sleeve, and the inner wall of the bearing outer ring is fixedly connected to an oil storage component;

[0010] The oil storage assembly includes an oil storage bag fixedly connected to the inner wall of the bearing outer ring, a plurality of evenly distributed oil storage chambers are opened inside the oil storage bag, a plurality of oil outlet grooves are connected to both sides of the inner wall of the oil storage chamber, a buoyancy ball is rollingly connected to the inner walls of the plurality of oil outlet grooves, an end of the oil outlet groove away from the oil storage chamber is fixedly connected to an oil outlet pipe, and a movable assembly is arranged between the oil storage chamber and the bearing outer ring.

[0011] By adopting the above scheme, through the oil storage component that is set up, the oil storage chamber is opened under the action of centrifugal force, and the lubricating oil in the oil storage chamber overflows along the oil outlet groove, and drives the buoyancy ball to float in the oil outlet groove. When the buoyancy ball reaches the groove at the end of the oil outlet groove, the oil outlet groove is unblocked, and the lubricating oil flows into the oil outlet pipe through the oil outlet groove, achieving the effect of multi-porous oil outlet.

[0012] Furthermore, the movable component includes a plurality of support springs fixedly connected to the inner wall of the bearing outer ring, and a lightweight movable plate is fixedly connected to one end of the support springs close to the oil storage chamber. The lightweight movable plate is movably installed between the bearing outer ring and the oil storage chamber through the support springs.

[0013] By adopting the above scheme, through the movable component that is set, when the shaft core rotates, the self-lubricating mechanism is driven to rotate through the shaft sleeve and generate centrifugal force. At this time, the lightweight movable plate squeezes the supporting spring in the outer ring of the bearing under the action of centrifugal force, so that the sealed oil storage chamber is opened, which plays the role of centrifugal starting and oil discharge.

[0014] Furthermore, the rolling assembly includes a rolling wheel rotatably connected to the outer ring of the bearing and the inner wall of the inner ring of the bearing, and the outer wall of the rolling wheel is provided with an oil collecting groove and a plurality of oil guide grooves.

[0015] By adopting the above scheme, through the setting of the rolling component, the oil outlet of the oil outlet pipe corresponds to the oil guide groove on the rolling wheel, and the lubricating oil flows into the oil guide groove. Since the rolling wheel rotates between the outer ring of the bearing and the inner ring of the bearing at this time, the lubricating oil can flow into each oil guide groove, so that the contact surface between the rolling wheel and the outer ring of the bearing and the inner ring of the bearing is lubricated, and then the lubricating oil in each oil guide groove is collected in the oil collecting tank, so as to achieve the effect of continuous lubrication and continuous oil delivery.

[0016] Furthermore, the external reflux component also includes a plurality of external lubrication flow grooves and a plurality of external reflux holes opened on the inner wall of the bearing outer ring, the inner wall of the bearing outer ring is fixedly connected with a plurality of external oil retaining rings, and the rolling wheel and the external lubrication flow groove are both arranged between two external oil retaining rings on the same side.

[0017] Furthermore, the internal reflux component also includes a plurality of internal lubrication circulation grooves and a plurality of internal reflux holes opened on the inner wall of the bearing inner ring, the outer wall of the bearing inner ring is fixedly connected with a plurality of internal oil retaining rings, and the rolling wheel and the internal lubrication circulation groove are both arranged between two internal oil retaining rings on the same side.

[0018] By adopting the above scheme, through the setting of the external reflux component and the internal reflux component, the oil collecting grooves correspond to the external lubrication flow groove of the bearing outer ring and the internal lubrication flow groove of the bearing inner ring respectively. Therefore, the lubricating oil will flow into the external lubrication flow groove and the internal lubrication flow groove under the action of centrifugal force and gravity, and reach between the bearing outer ring and the upper end cover or the lower end cover, and the bearing inner ring and the shaft sleeve, so that the contact surfaces between the bearing outer ring and the upper end cover or the lower end cover, and the bearing inner ring and the shaft sleeve are lubricated, and then they are respectively collected in the middle grooves of the bearing outer ring and the bearing inner ring, thereby providing an oil return channel.

[0019] Furthermore, a second reflux valve body is fixedly connected to the inner wall of the light movable plate, and a first gravity ball is rollingly connected between the second reflux valve body and the external reflux hole.

[0020] Furthermore, a first reflux valve body is fixedly connected to the bottom of the oil storage cavity, and a second gravity ball is rollingly connected between the first reflux valve body and the internal reflux hole.

[0021] Furthermore, a plurality of limit posts are fixedly connected to the inner wall of the oil storage cavity, and a heavy density block is slidably connected between the plurality of limit posts.

[0022] By adopting the above scheme, the lubricating oil flows back to the oil storage chamber through the external reflux hole and the internal reflux hole in sections through the second reflux hole, the first reflux hole, the first gravity ball, the second gravity ball and the heavy density block. When the external reflux hole is on the top and the internal reflux hole is on the bottom, the first gravity ball in the external reflux hole will fall on the second reflux valve body, the external reflux hole will open, and the lubricating oil in the middle groove of the outer ring of the bearing will flow back to the oil storage chamber through the external reflux hole and the second reflux valve body, while the internal reflux hole will be closed by the second gravity ball, and the heavy density block in the oil storage chamber will also close to the internal reflux hole to close the first reflux valve body, and vice versa, thereby achieving the effect of automatic oil return in any direction under the action of gravity.

[0023] Beneficial effects of the present invention:

[0024] 1. Through the set oil storage components, movable components and rolling components, a reasonable lubrication channel path is obtained to ensure that the lubricant can reach each lubrication point evenly and smoothly, and ensure that the lubricant can evenly cover all surfaces that need lubrication. When the shaft core rotates, the self-lubricating mechanism is driven to rotate through the shaft sleeve and generate centrifugal force. At this time, the lightweight movable plate squeezes the supporting spring in the outer ring of the bearing under the action of centrifugal force, so that the sealed oil storage chamber is opened, and the lubricating oil in the oil storage chamber flows into the oil outlet pipe through the oil outlet groove, and then flows into the oil guide groove, so that the contact surface between the rolling wheel and the outer ring of the bearing and the inner ring of the bearing is lubricated, so as to improve the overall operation quality and reliability of the equipment.

[0025] 2. Through the external reflux component and the internal reflux component, the lubricating oil in each oil guide groove is collected in the oil collecting groove, and under the action of centrifugal force and gravity, it will flow into the external lubrication circulation groove and the internal lubrication circulation groove, so that the contact surface between the outer ring of the bearing and the upper end cover or the lower end cover, and the inner ring of the bearing and the sleeve are lubricated, and then collected in the middle grooves of the outer ring of the bearing and the inner ring of the bearing respectively, and then flow back to the oil storage cavity in sections, which plays the role of providing an oil return channel, so that the resistance encountered by the lubricant in the oil return process is reduced, so as to achieve the effect of improving the reliability and service life of the equipment.

[0026] 3. By setting the second reflux valve body, the first reflux valve body, the first gravity ball, the second gravity ball and the heavy density block, the lubricating oil flows back to the oil storage chamber through the external reflux hole and the internal reflux hole in sections. When the external reflux hole is on the top and the internal reflux hole is on the bottom, the first gravity ball in the external reflux hole will fall on the second reflux valve body, the external reflux hole will open, and the lubricating oil in the middle groove of the outer ring of the bearing will flow back to the oil storage chamber through the external reflux hole and the second reflux valve body, while the internal reflux hole will be closed by the second gravity ball, and the heavy density block in the oil storage chamber will also close to the internal reflux hole to close the first reflux valve body, and vice versa, so as to achieve the effect of automatic oil return in any direction under the action of gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0028] Figure 2 It is an exploded schematic diagram of the main structure of the present invention;

[0029] Figure 3 It is a schematic diagram of the cross-sectional structure of the external reflux component of the present invention;

[0030] Figure 4 It is a schematic diagram of the cross-sectional structure of the oil storage assembly of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the external reflux hole of the present invention;

[0032] Figure 6 It is a partial structural schematic diagram of the oil storage cavity of the present invention;

[0033] Figure 7 It is a structural schematic diagram of the rolling assembly of the present invention;

[0034] Figure 8 It is a partial structural schematic diagram of the internal reflux component of the present invention;

[0035] Fig. 9 It is a schematic diagram of the cross-sectional structure of the upper end cover of the present invention;

[0036] Fig.10 For the present invention Fig. 9The structural diagram of the enlarged part at A in the middle;

[0037] Fig.11 For the present invention Fig.10 The structural diagram of the enlarged part at B in the middle;

[0038] Fig.12 It is a schematic diagram of the state of the lubricating liquid returning from the external return hole of the present invention;

[0039] Fig.13 It is a schematic diagram of the state of lubricating fluid returning through the internal return hole of the present invention.

[0040] In the figure:

[0041] 1. Upper end cover; 2. Lower end cover; 3. Shaft core; 4. Dustproof seal ring; 5. Shaft sleeve; 6. Self-lubricating mechanism; 61. External reflux assembly; 611. Bearing outer ring; 612. External lubrication flow groove; 613. External reflux hole; 614. First gravity ball; 615. External oil retaining ring; 62. Oil storage assembly; 621. Oil storage bag; 622. Oil storage cavity; 623. Heavy density block; 624. Limiting column; 625. First reflux valve body; 62 6. buoyancy ball; 627. oil outlet groove; 628. oil outlet pipe; 63. rolling assembly; 631. rolling wheel; 632. oil collecting groove; 633. oil guide groove; 64. internal reflux assembly; 641. bearing inner ring; 642. internal lubrication flow groove; 643. internal reflux hole; 644. second gravity ball; 645. internal oil retaining ring; 65. movable assembly; 651. lightweight movable plate; 652. second reflux valve body; 653. support spring. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0043] Reference Figure 1 - Fig.13 , a self-lubricating dustproof bearing seat is provided, including an upper end cover 1, a lower end cover 2 hingedly connected to the lower end cover 1, a self-lubricating mechanism 6 and a dustproof sealing ring 4 arranged inside the upper end cover 1 and the lower end cover 2, a shaft sleeve 5 arranged inside the self-lubricating mechanism 6, and a shaft core 3 movably installed inside the shaft sleeve 5 and the dustproof sealing ring 4, the self-lubricating mechanism 6 includes an external reflux component 61 rotatably connected to the inner walls of the upper end cover 1 and the lower end cover 2, an internal reflux component 64 rotatably connected to the outer wall of the shaft sleeve 5, and a plurality of rolling components 63 rotatably connected between the external reflux component 61 and the internal reflux component 64, the external reflux component 61 includes a bearing outer ring 611 rotatably connected to the inner walls of the upper end cover 1 and the lower end cover 2, the internal reflux component 64 includes a bearing inner ring 641 rotatably connected to the outer wall of the shaft sleeve 5, and the inner wall of the bearing outer ring 611 is fixedly connected to an oil storage component 62.

[0044] Reference Figure 4 - Figure 6 The oil storage component 62 includes an oil storage bag 621 fixedly connected to the inner wall of the bearing outer ring 611, and a plurality of evenly distributed oil storage chambers 622 are opened inside the oil storage bag 621. Both sides of the inner wall of the oil storage chamber 622 are connected with a plurality of oil outlet grooves 627, and the inner walls of the plurality of oil outlet grooves 627 are rollingly connected with buoyancy balls 626. One end of the oil outlet groove 627 away from the oil storage chamber 622 is fixedly connected with an oil outlet pipe 628, and a movable component 65 is arranged between the oil storage chamber 622 and the bearing outer ring 611.

[0045] Specifically, the dustproof sealing ring 4 is arranged on both sides of the self-lubricating mechanism 6, which can effectively prevent dust from entering the self-lubricating mechanism 6 and affecting the self-lubricating system. The sleeve 5 can fix the shaft core 3 of different diameters through a locking piece, and the dustproof sealing ring 4 can also be replaced with the diameter of the shaft core 3. The oil storage chamber 622 is set to multiple, which can make the distribution of the lubricating oil more even, and can also avoid the lubricating oil from shaking and mixing in the oil storage bag 621, reducing the situation of local lubricating oil or too little lubricating oil. The density of the buoyancy ball 626 is less than the lubricating oil and can float with the lubricating oil.

[0046] Through the oil storage component 62, the oil storage chamber 622 opens under the action of centrifugal force, and the lubricating oil in the oil storage chamber 622 overflows along the oil outlet groove 627, and drives the buoyancy ball 626 to float in the oil outlet groove 627. When the buoyancy ball 626 reaches the groove at the end of the oil outlet groove 627, the oil outlet groove 627 is unblocked, and the lubricating oil flows into the oil outlet pipe 628 through the oil outlet groove 627, achieving the effect of porous oil outlet.

[0047] Reference Fig.10 - Fig.11 The movable component 65 includes a plurality of support springs 653 fixedly connected to the inner wall of the bearing outer ring 611, and a lightweight movable plate 651 is fixedly connected to one end of the plurality of support springs 653 close to the oil storage chamber 622. The lightweight movable plate 651 is movably installed between the bearing outer ring 611 and the oil storage chamber 622 through the support springs 653.

[0048] Specifically, the gravity of the lightweight movable plate 651 is smaller than the centrifugal force of rotation, the support spring 653 has a large deformation and a small force, and the lightweight movable plate 651 can move between the bearing outer ring 611 and the oil storage chamber 622 under the action of the support spring 653 and the centrifugal force.

[0049] Through the movable component 65, when the shaft core 3 rotates, the self-lubricating mechanism 6 is driven to rotate through the shaft sleeve 5 and generate centrifugal force. At this time, the lightweight movable plate 651 squeezes the supporting spring 653 in the bearing outer ring 611 under the action of centrifugal force, so that the sealed oil storage chamber 622 is opened, which plays the role of centrifugal starting oil discharge.

[0050] Reference Figure 7 The rolling assembly 63 includes a rolling wheel 631 rotatably connected to the inner wall of the bearing outer ring 611 and the bearing inner ring 641 , and an oil collecting groove 632 and a plurality of oil guide grooves 633 are formed on the outer wall of the rolling wheel 631 .

[0051] Through the rolling component 63, the oil outlet of the oil outlet pipe 628 corresponds to the oil guide groove 633 on the rolling wheel 631, and the lubricating oil flows into the oil guide groove 633. Since the rolling wheel 631 rotates between the bearing outer ring 611 and the bearing inner ring 641 at this time, the lubricating oil can flow into each oil guide groove 633, so that the contact surface between the rolling wheel 631 and the bearing outer ring 611 and the bearing inner ring 641 is lubricated, and then the lubricating oil in each oil guide groove 633 is collected in the oil collecting groove 632, so as to achieve the effect of continuous lubrication and continuous oil delivery.

[0052] Reference Figure 5 - Figure 8 The external reflux component 61 also includes a plurality of external lubrication flow grooves 612 and a plurality of external reflux holes 613 opened on the inner wall of the bearing outer ring 611, a plurality of external oil retaining rings 615 are fixedly connected to the inner wall of the bearing outer ring 611, and the rolling wheel 631 and the external lubrication flow grooves 612 are both arranged between the two external oil retaining rings 615 on the same side. The internal reflux component 64 also includes a plurality of internal lubrication flow grooves 642 and a plurality of internal reflux holes 643 opened on the inner wall of the bearing inner ring 641, a plurality of internal oil retaining rings 645 are fixedly connected to the outer wall of the bearing inner ring 641, and the rolling wheel 631 and the internal lubrication flow grooves 642 are both arranged between the two internal oil retaining rings 645 on the same side.

[0053] Specifically, the two external oil detent rings 615 and the two internal oil detent rings 645 on the same side sandwich the rolling wheel 631 in the middle but do not contact it, which can effectively prevent the lubricating oil from splashing when the shaft core 3 rotates. A small amount of splashed and blocked lubricating oil still remains in the grooves formed by the two external oil detent rings 615 and the two internal oil detent rings 645, and flows into the external lubricating circulation groove 612 and the internal lubricating circulation groove 642 respectively.

[0054] By setting up the external reflux component 61 and the internal reflux component 64, the oil collecting groove 632 corresponds to the external lubrication circulation groove 612 of the bearing outer ring 611 and the internal lubrication circulation groove 642 of the bearing inner ring 641 respectively. Therefore, the lubricating oil will flow into the external lubrication circulation groove 612 and the internal lubrication circulation groove 642 under the action of centrifugal force and gravity, and reach between the bearing outer ring 611 and the upper end cover 1 or the lower end cover 2, and the bearing inner ring 641 and the shaft sleeve 5, so that the contact surfaces between the bearing outer ring 611 and the upper end cover 1 or the lower end cover 2, and the bearing inner ring 641 and the shaft sleeve 5 are lubricated, and then collected in the middle grooves of the bearing outer ring 611 and the bearing inner ring 641 respectively, to provide an oil return channel.

[0055] Reference Fig.11 - Fig.13 A second return valve body 652 is fixedly connected to the inner wall of the lightweight movable plate 651, a first gravity ball 614 is rollingly connected between the second return valve body 652 and the external return hole 613, a first return valve body 625 is fixedly connected to the bottom of the oil storage chamber 622, a second gravity ball 644 is rollingly connected between the first return valve body 625 and the internal return hole 643, a plurality of limit columns 624 are fixedly connected to the inner wall of the oil storage chamber 622, and a heavy density block 623 is slidingly connected between the plurality of limit columns 624.

[0056] By means of the second return valve body 652, the first return valve body 625, the first gravity ball 614, the second gravity ball 644 and the heavy density block 623, the lubricating oil flows back to the oil storage chamber 622 in sections through the external return hole 613 and the internal return hole 643. When the external return hole 613 is on top and the internal return hole 643 is on the bottom, the first gravity ball 614 in the external return hole 613 will fall on the second return valve body 652, the external return hole 613 will open, and the lubricating oil in the middle groove of the bearing outer ring 611 will flow back to the oil storage chamber 622 through the external return hole 613 and the second return valve body 652, while the internal return hole 643 will be closed by the second gravity ball 644, and the heavy density block 623 in the oil storage chamber 622 will also close the first return valve body 625 close to the internal return hole 643, and vice versa, thereby achieving the effect of automatic oil return in any direction under the action of gravity.

[0057] During use, when the shaft core 3 rotates, the self-lubricating mechanism 6 is driven to rotate through the shaft sleeve 5 and generate centrifugal force. At this time, the lightweight movable plate 651 squeezes the support spring 653 in the bearing outer ring 611 under the action of centrifugal force, so that the sealed oil storage chamber 622 is opened, and the lubricating oil in the oil storage chamber 622 flows into the oil outlet pipe 628 through the oil outlet groove 627, and then flows into the oil guide groove 633, so that the contact surface between the rolling wheel 631 and the bearing outer ring 611 and the bearing inner ring 641 is lubricated. Then the lubricating oil in each oil guide groove 633 is collected in the oil collecting groove 632, and under the action of centrifugal force and gravity, it will flow into the external lubricating circulation groove 612 and the internal lubricating circulation groove 642, so that the bearing outer ring 611 and the upper end cover 1 or the lower end cover 2, the bearing inner ring 641 and The contact surface of the sleeve 5 is lubricated and then collected in the middle grooves of the bearing outer ring 611 and the bearing inner ring 641 respectively, and then flows back to the oil storage chamber 622 in sections. When the external reflux hole 613 is on the top and the internal reflux hole 643 is on the bottom, the lubricating oil in the middle groove of the bearing outer ring 611 flows back to the oil storage chamber 622 through the external reflux hole 613 and the second reflux valve body 652, and the internal reflux hole 643 will be closed by the second gravity ball 644, and the heavy density block 623 in the oil storage chamber 622 will also close the internal reflux hole 643 to close the first reflux valve body 625, and vice versa. Therefore, no matter in fast rotation, slow rotation or stop state, the lubricating oil can return to the oil storage chamber 622 under the action of gravity to avoid the accumulation of lubricating oil on the contact surface.

[0058] Working principle of the present invention:

[0059] When the shaft core 3 rotates, the self-lubricating mechanism 6 is driven to rotate through the shaft sleeve 5 and generate centrifugal force. At this time, the lightweight movable plate 651 squeezes the supporting spring 653 in the bearing outer ring 611 under the action of centrifugal force, so that the sealed oil storage chamber 622 is opened, and the lubricating oil in the oil storage chamber 622 overflows along the oil outlet groove 627 and drives the buoyancy ball 626 to float in the oil outlet groove 627. When the buoyancy ball 626 reaches the groove at the end of the oil outlet groove 627, the oil outlet groove 627 is unblocked, and the lubricating oil flows into the oil outlet pipe 628 through the oil outlet groove 627.

[0060] The oil outlet of the oil outlet pipe 628 corresponds to the oil guide groove 633 on the rolling wheel 631, and the lubricating oil flows into the oil guide groove 633. Since the rolling wheel 631 rotates between the bearing outer ring 611 and the bearing inner ring 641 at this time, the lubricating oil can flow into each oil guide groove 633, so that the contact surface between the rolling wheel 631 and the bearing outer ring 611 and the bearing inner ring 641 is lubricated, and then the lubricating oil in each oil guide groove 633 is collected in the oil collecting groove 632.

[0061] The oil collecting groove 632 corresponds to the external lubrication flow groove 612 of the bearing outer ring 611 and the internal lubrication flow groove 642 of the bearing inner ring 641 respectively. Therefore, the lubricating oil will flow into the external lubrication flow groove 612 and the internal lubrication flow groove 642 under the action of centrifugal force and gravity, and reach between the bearing outer ring 611 and the upper end cover 1 or the lower end cover 2, and the bearing inner ring 641 and the shaft sleeve 5, so that the contact surfaces between the bearing outer ring 611 and the upper end cover 1 or the lower end cover 2, and the bearing inner ring 641 and the shaft sleeve 5 are lubricated, and then collected in the middle grooves of the bearing outer ring 611 and the bearing inner ring 641 respectively.

[0062] When there is lubricating oil in the middle groove of the bearing outer ring 611 and the bearing inner ring 641, the lubricating oil will flow back to the oil storage chamber 622 in sections through the external reflux hole 613 and the internal reflux hole 643. When the external reflux hole 613 is on the top and the internal reflux hole 643 is on the bottom, the first gravity ball 614 in the external reflux hole 613 will fall on the second reflux valve body 652, and the external reflux hole 613 will open. The lubricating oil in the middle groove of the bearing outer ring 611 will flow back to the oil storage chamber 622 through the external reflux hole 613 and the second reflux valve body 652, and the internal reflux hole 643 will be closed by the second gravity ball 644, and the heavy density block 623 in the oil storage chamber 622 will also close the first reflux valve body 625 close to the internal reflux hole 643.

[0063] On the contrary, when the external reflux hole 613 is at the bottom and the internal reflux hole 643 is at the top, the second gravity ball 644 in the internal reflux hole 643 will fall on the first reflux valve body 625, the internal reflux hole 643 will open, and the lubricating oil in the middle groove of the bearing inner ring 641 will flow back to the oil storage chamber 622 through the internal reflux hole 643 and the first reflux valve body 625, while the external reflux hole 613 will be closed by the first gravity ball 614, and the heavy density block 623 in the oil storage chamber 622 will also close the second reflux valve body 652 close to the external reflux hole 613.

[0064] Therefore, no matter in fast rotation, slow rotation or stop state, the lubricating oil can return to the oil storage chamber 622 under the action of gravity, so as to avoid the accumulation of lubricating oil on the contact surface.

[0065] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A self-lubricating dustproof bearing seat, comprising an upper end cover (1), a lower end cover (2) hingedly connected to the lower end cover (1), a self-lubricating mechanism (6) and a dustproof seal (4) arranged inside the upper end cover (1) and the lower end cover (2), a shaft sleeve (5) arranged inside the self-lubricating mechanism (6), and a shaft core (3) movably mounted inside the shaft sleeve (5) and the dustproof seal (4), characterized in that: The self-lubricating mechanism (6) comprises an external reflux component (61) rotatably connected to the inner walls of the upper end cover (1) and the lower end cover (2), an internal reflux component (64) rotatably connected to the outer wall of the shaft sleeve (5), and a plurality of rolling components (63) rotatably connected between the external reflux component (61) and the internal reflux component (64), wherein the external reflux component (61) comprises a bearing outer ring (611) rotatably connected to the inner walls of the upper end cover (1) and the lower end cover (2), the internal reflux component (64) comprises a bearing inner ring (641) rotatably connected to the outer wall of the shaft sleeve (5), and the inner wall of the bearing outer ring (611) is fixedly connected to an oil storage component (62); The oil storage component (62) includes an oil storage bag (621) fixedly connected to the inner wall of the bearing outer ring (611), and a plurality of evenly distributed oil storage chambers (622) are provided inside the oil storage bag (621). Both sides of the inner wall of the oil storage chamber (622) are connected to a plurality of oil outlet grooves (627), and the inner walls of the plurality of oil outlet grooves (627) are rollingly connected to buoyancy balls (626). One end of the oil outlet groove (627) away from the oil storage chamber (622) is fixedly connected to an oil outlet pipe (628), and a movable component (65) is provided between the oil storage chamber (622) and the bearing outer ring (611).

2. The self-lubricating dustproof bearing seat according to claim 1, characterized in that: The movable component (65) includes a plurality of support springs (653) fixedly connected to the inner wall of the bearing outer ring (611), and one end of the plurality of support springs (653) close to the oil storage chamber (622) is fixedly connected to a lightweight movable plate (651), and the lightweight movable plate (651) is movably installed between the bearing outer ring (611) and the oil storage chamber (622) through the support springs (653).

3. The self-lubricating dustproof bearing seat according to claim 2 is characterized in that: The rolling assembly (63) comprises a rolling wheel (631) rotatably connected to the inner wall of the bearing outer ring (611) and the bearing inner ring (641); the outer wall of the rolling wheel (631) is provided with an oil collecting groove (632) and a plurality of oil guide grooves (633).

4. The self-lubricating dustproof bearing seat according to claim 3 is characterized in that: The external reflux component (61) further comprises a plurality of external lubrication flow grooves (612) and a plurality of external reflux holes (613) formed on the inner wall of the bearing outer ring (611); a plurality of external oil retaining rings (615) are fixedly connected to the inner wall of the bearing outer ring (611); and the rolling wheel (631) and the external lubrication flow grooves (612) are both arranged between two external oil retaining rings (615) on the same side.

5. The self-lubricating dustproof bearing seat according to claim 4, characterized in that: The internal reflux component (64) further comprises a plurality of internal lubrication flow grooves (642) and a plurality of internal reflux holes (643) formed on the inner wall of the bearing inner ring (641); a plurality of internal oil retaining rings (645) are fixedly connected to the outer wall of the bearing inner ring (641); and the rolling wheel (631) and the internal lubrication flow grooves (642) are both arranged between two internal oil retaining rings (645) on the same side.

6. The self-lubricating dustproof bearing seat according to claim 5, characterized in that: A second return valve body (652) is fixedly connected to the inner wall of the light movable plate (651), and a first gravity ball (614) is rollingly connected between the second return valve body (652) and the external return hole (613).

7. The self-lubricating dustproof bearing seat according to claim 5, characterized in that: A first return valve body (625) is fixedly connected to the bottom of the oil storage chamber (622), and a second gravity ball (644) is rollingly connected between the first return valve body (625) and the internal return hole (643).

8. The self-lubricating dustproof bearing seat according to claim 7, characterized in that: A plurality of limiting columns (624) are fixedly connected to the inner wall of the oil storage cavity (622), and a heavy density block (623) is slidably connected between the plurality of limiting columns (624).

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