Boundary lubrication bearing and preparation method thereof

Abstract

The invention discloses a boundary lubrication bearing and a preparation method thereof, which relates to the field of bearings, including a base, a mounting seat and a bearing shell, wherein the inner wall of the mounting seat is provided with an outer ring, the inner wall of the outer ring is rotatably provided with an inner ring, a fixed sleeve is welded in a groove provided in the inner wall of the outer ring, and a movable block is movably provided on the inner wall of the fixed sleeve. The invention arranges an outer ring and an inner ring between the mounting seats, and the bearing shell is installed inside the inner ring, and a lubricating oil hydraulic mechanism is used to push the inner ring and the bearing shell to rotate synchronously, so that the positions of the inner ring and the bearing shell are fixed after the inner ring and the bearing shell rotate ninety degrees. At this time, the connection seams between the components are staggered, and the fixing effect is better. After the components are rotated in place, the lubricating oil replenishing mechanism connects the oil circuit, and after the lubricating oil plays a hydraulic driving role, the lubricating oil can be replenished into the inside of the bearing shell to lubricate the shaft and the bearing shell.

Description

Technical Field

[0001] This invention relates to the field of bearings, specifically to a boundary lubrication bearing and its manufacturing method. Background Technology

[0002] Boundary lubrication bearings, a type of sliding bearing, have a steel plate base with sintered spherical bronze powder in the middle and modified polyoxymethylene rolled on the surface. They are suitable for low-speed, medium-load applications under normal temperature conditions. Replacing traditional copper bushings reduces costs and extends service life. When used on rolling mills, they can reduce the frequency of lubrication and simplify replacement procedures. The products are widely used in automotive chassis, forging presses, metallurgical and mining machinery, construction machinery, hydropower, and the steel rolling industry.

[0003] In addition to the bearing bush, the boundary lubrication bearing also includes the bearing housing and bearing cover. The bearing bush is installed between the bearing housing and bearing cover. During installation, the main methods are pressing and hammering. In special cases, the hot fitting method is used. Most bushings are made of copper or cast iron. Care should be taken during assembly. A wooden hammer or a hammer with a wooden block can be used to hit the bushing. When the interference tolerance is large, a press is used to press it in. Whether hammering or pressing, tilting must be prevented. After assembly, the oil groove and oil hole should be in the required position.

[0004] However, in actual installation, it is inconvenient to install by hammering. Hammering may also cause edge deformation, which will reduce the lubrication effect of the bearing and may even cause the bearing to fail to be installed with the shaft, affecting the normal operation of the machine. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a boundary lubrication bearing and its manufacturing method to solve the technical problems of inconvenient installation of general boundary lubrication bearings and the potential for edge deformation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a boundary lubrication bearing, comprising a base, a mounting base, and a bearing bush. An outer ring is disposed on the inner wall of the mounting base, and an inner ring is rotatably disposed on the inner wall of the outer ring. A fixed sleeve is welded into a groove on the inner wall of the outer ring. A movable block is movably disposed on the inner wall of the fixed sleeve. One end of the movable block is connected to the outer wall of the inner ring via a connecting mechanism. A lubricating oil hydraulic mechanism and a lubricating oil replenishment mechanism are disposed on the inner wall of the mounting base. The lubricating oil hydraulic mechanism is connected to the interior of the fixed sleeve. A connecting pipe is installed on the outer wall of the bearing bush. After the inner ring rotates to the lubricating oil replenishment mechanism, the connecting pipe connects the oil passage to the interior of the bearing bush. The mounting base, outer ring, inner ring, and bearing bush are all two-section combined structures.

[0007] The present invention is further configured such that the lubricating oil hydraulic mechanism includes an oil supply pipe and a first sealing ring, one end of the oil supply pipe is connected to the inside of the fixed sleeve, and the first sealing ring is provided between the bottom of the oil supply pipe and the mounting base.

[0008] The present invention is further configured such that the lubricating oil replenishment mechanism includes an oil hole and a second sealing ring, the outer ring and the surface of the mounting base are provided with oil holes, and the second sealing ring is provided inside the boss on the inner wall of the oil hole.

[0009] The present invention is further configured such that an oil groove is provided inside the base, and an oil replenishment pipe is provided on the side wall of the mounting base, the oil replenishment pipe being connected to the internal oil groove.

[0010] The present invention is further configured such that the connecting mechanism includes a through hole and a damping post, one end of the movable block and the surface of the inner ring are provided with a through hole, the inner wall of the through hole is provided with a damping post, and the movable block is connected to the inner ring through the damping post.

[0011] The present invention is further configured such that the connecting pipe includes a fixed pipe, a spring, a movable pipe and a barrier net, a fixed pipe is provided through the outer wall of a section of the bearing bush, one end of the fixed pipe is connected to the interior of the bearing bush and the inner wall of the fixed pipe is provided with a barrier net, the other end of the fixed pipe is provided with a spring, one end of the spring is connected to the movable pipe, and one end of the movable pipe extends outward from the inner ring surface through a through groove.

[0012] The present invention is further configured such that the inner wall of the outer ring is provided with a slot, the outer wall of the inner ring is provided with an insert block, the inner wall of the inner ring is provided with a positioning groove, and the outer wall of the bearing is provided with a positioning block that matches the positioning groove.

[0013] The present invention is further configured such that bolt fixing holes are provided through the outer wall of a set of mounting bases.

[0014] A method for manufacturing a boundary lubrication bearing includes the following steps:

[0015] S1: Prepare molds for related components such as base, mounting base, outer ring, inner ring and bearing shell, and prepare related components according to the molds. The bearing shell is made of high-quality low carbon steel as the base, with sintered spherical porous bronze powder in the middle, which is firmly embedded with surface modified polyoxymethylene, and oil storage pits are rolled on the surface to prepare the bearing shell. The base, mounting base, outer ring and inner ring are prepared using bearing steel. Inserts are welded to the outer wall of the inner ring. The mounting base, outer ring, inner ring and bearing shell are assembled structures. The corresponding two halves of the components form a complete circumference after assembly.

[0016] S2: Use a drilling and milling machine to drill and slot holes at corresponding positions on the surface of each component to facilitate the installation of subsequent components;

[0017] S3: Weld an oil supply pipe to the outer wall of the fixed sleeve and insert the oil supply pipe into the mounting base. Then weld the fixed sleeve to the groove opened on the inner wall of the outer ring and connect the movable block inside the fixed sleeve to the inner ring.

[0018] S4: Assemble the remaining mounting bracket, outer ring, inner ring, and bearing shell.

[0019] In summary, the present invention has the following advantages: By setting an outer ring and an inner ring between the mounting bases, and installing the bearing shell inside the inner ring, the present invention uses a lubricating oil hydraulic mechanism to push the inner ring and the bearing shell to rotate synchronously. After rotating 90 degrees, the positions of the inner ring and the bearing shell are fixed. At this time, the connecting seams between the components are staggered, resulting in a better fixing effect. After rotating to the correct position, the lubricating oil replenishment mechanism connects the oil circuit. After the lubricating oil plays a hydraulic pushing role, it can replenish the lubricating oil to the inside of the bearing shell, thus lubricating the shaft and the bearing shell. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the disassembled state of the present invention;

[0022] Figure 3 This is a schematic diagram of the installation structure of the outer and inner rings of the present invention;

[0023] Figure 4 This is a schematic diagram of the mounting structure of the outer ring of the present invention;

[0024] Figure 5 This is a schematic diagram of the mounting base of the present invention;

[0025] Figure 6 This is a schematic diagram of the internal structure of the mounting base of the present invention;

[0026] Figure 7 This is a schematic diagram of the oil pipeline structure of the present invention;

[0027] Figure 8 This is a first-view structural diagram of the inner ring and bearing bush of the present invention;

[0028] Figure 9 This is a second-view structural diagram of the inner ring and bearing bush of the present invention;

[0029] Figure 10 For the present invention Figure 3 Enlarged view of the structure at point A;

[0030] Figure 11 This is a schematic diagram of the connecting pipe of the present invention.

[0031] In the diagram: 1. Base; 2. Mounting seat; 3. Outer ring; 4. Inner ring; 5. Bearing shell; 6. Positioning groove; 7. Fixing sleeve; 8. Movable block; 9. Through hole; 10. Damping insert; 11. Oil groove; 12. Oil supply pipe; 13. First sealing ring; 14. Connecting pipe; 141. Fixing pipe; 142. Spring; 143. Movable pipe; 144. Barrier net; 15. Slot; 16. Insert block; 17. Oil hole; 18. Second sealing ring; 19. Oil replenishment pipe; 20. Bolt fixing hole. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] A type of boundary lubricated bearing, such as Figure 1-11 As shown, it includes a base 1, a mounting seat 2 and a bearing 5. The mounting seat 2 and the bearing 5 are two-section combined structures. The bottom mounting seat 2 is fixedly set on the top of the base 1. The outer wall of the top mounting seat 2 is provided with bolt fixing holes 20. A set of mounting seats 2 can be fixed by inserting bolts into the bolt fixing holes 20.

[0034] The inner wall of the mounting base 2 is provided with an outer ring 3, and the inner wall of the outer ring 3 is rotatably provided with an inner ring 4. A fixing sleeve 7 is welded in a groove opened in the inner wall of the outer ring 3. A movable block 8 is movably provided in the inner wall of the fixing sleeve 7. One end of the movable block 8 is connected to the outer wall of the inner ring 4 through a connecting mechanism. During installation, the outer ring 3 and the inner ring 4 are placed and installed in sequence. The surface of the inner ring 4 is provided with an insert block 16, and the inner wall of the outer ring 3 is provided with a slot 15. The inner ring 4 is inserted into the slot 15 through the insert block 16 to install the inner ring 4 and the outer ring 3. The inner wall of the inner ring 4 is provided with a positioning groove 6, and the outer wall of the bearing 5 is provided with a positioning block that matches the positioning groove 6. The bearing 5 is placed and fixed by inserting the positioning block into the positioning groove 6. There is no relative rotation between the bearing 5 and the inner ring 4. Since the mounting base 2, the outer ring 3, the inner ring 4 and the bearing 5 are all two-section combined structures, the lower structure is installed first, and then the upper structure is assembled and installed.

[0035] Therefore, according to the above installation structure, the outer ring 3, inner ring 4 and bearing shell 5 are installed in sequence inside the mounting base 2. Then, the shaft to be installed is placed on the inner wall of the bearing shell 5. The bearing shell 5, inner ring 4 and the remaining part of outer ring 3 are then assembled in sequence and fixed with bolts on the mounting base 2. At this time, the shaft to be installed is temporarily fixed. Then, the inner ring 4 and bearing shell 5 are rotated to further fix the overall structure.

[0036] The base 1 has an oil tank 11 inside, and the mounting base 2 has an oil replenishment pipe 19 on its side wall. The oil replenishment pipe 19 is connected to the internal oil tank 11, and the oil tank 11 is replenished with oil through the oil replenishment pipe 19.

[0037] The inner wall of the mounting base 2 is provided with a lubricating oil hydraulic mechanism, which includes an oil supply pipe 12 and a first sealing ring 13. One end of the oil supply pipe 12 is connected to the inside of the fixed sleeve 7, and the first sealing ring 13 is provided between the bottom of the oil supply pipe 12 and the mounting base 2. The first sealing ring 13 can seal the oil supply pipe 12 and the mounting base 2 to prevent lubricating oil from entering the interior of the mounting base 2. The lubricating oil in the oil tank 11 enters the interior of the fixed sleeve 7 through the oil supply pipe 12 under external pressure. At this time, the lubricating oil pushes the movable block 8 along the fixed sleeve 7 by pressure. The inner side of sleeve 7 moves, and during the assembly of inner ring 4 and outer ring 3, one end of movable block 8 is connected to the outer wall of inner ring 4 through a connecting mechanism. Therefore, when lubricating oil pushes movable block 8 to move, movable block 8 will push inner ring 4 to rotate 90 degrees synchronously. At this time, bearing 5 will also rotate 90 degrees synchronously, so that the connecting seam between inner ring 4 and bearing 5 assembly is staggered with the connecting seam of outer ring 3, forming a cross shape. This can prevent the overall structure from falling apart when the shaft rotates, and the shaft can be fixed without knocking, providing better protection for the shaft and bearing.

[0038] The connecting mechanism includes a through hole 9 and a damping pin 10. One end of the movable block 8 and the surface of the inner ring 4 are provided with a through hole 9. The damping pin 10 is inserted into the inner wall of the through hole 9. The movable block 8 is connected to the inner ring 4 through the damping pin 10. When installing the inner ring 4, after the inner ring 4 is placed, the damping pin 10 can be inserted into the through hole 9. At this time, the inner ring 4 and the movable block 8 can be connected and fixed.

[0039] After the inner ring 4 and the bearing 5 are rotated by pushing the movable block 8 with lubricating oil, the lubricating oil has an additional function. The mounting base 2 is equipped with a lubricating oil replenishment mechanism, which includes an oil hole 17 and a second sealing ring 18. The outer ring 3 and the surface of the mounting base 2 are provided with oil holes 17. The second sealing ring 18 is provided inside the boss on the inner wall of the oil hole 17. At the same time, the outer wall of the bearing 5 is equipped with a connecting pipe 14. In the initial state, the connecting seams of the mounting base 2, the outer ring 3, the inner ring 4 and the bearing 5 are all on the same horizontal line, and the connecting pipe 14 is also in a horizontal state. Therefore, after the inner ring 4 and the bearing 5 are rotated 90 degrees, the connecting pipe 14 is inserted into the oil hole 17. At this time, the lubricating oil in the oil groove 11 and the inner wall of the bearing 5 are connected through the oil hole 17 and the connecting pipe 14. The lubricating oil can be squeezed into the interior of the bearing 5 under the action of external pressure and lubricate the shaft and the bearing 5.

[0040] The connecting pipe 14 includes a fixed pipe 141. A section of the outer wall of the bearing bush 5 is provided with the fixed pipe 141. One end of the fixed pipe 141 is connected to the inside of the bearing bush 5. The inner wall of the fixed pipe 141 is provided with a barrier net 144. The other end of the fixed pipe 141 is provided with a spring 142. One end of the spring 142 is connected to a movable pipe 143. One end of the movable pipe 143 extends outward from the surface of the inner ring 4 through a groove. Therefore, when the connecting pipe 14 is rotated to a vertical position, the movable pipe 143 is inserted into the oil hole 17 under the action of the spring 142 and squeezes the second sealing ring 18. The second sealing ring 18 can prevent the lubricating oil from passing through the connecting pipe 14 and entering the interior of other components to cause contamination. The barrier net 144 can limit the flow of lubricating oil to a certain extent and prevent too much lubricating oil from entering the interior of the bearing bush 5.

[0041] Furthermore, a sealing gasket is provided on the entire circumference of the oil hole 17, which is directly opposite the outer wall of the inner ring 4. The surface of the sealing gasket only leaves the hole through which the connecting pipe 14 protrudes. The sealing gasket is in close contact with the inner wall of the outer ring 3, which can block the oil hole 17 and prevent lubricating oil from entering the component and causing contamination when the connecting pipe 14 is not in position. The oil passage is connected after the connecting pipe 14 is rotated to the position of the oil hole 17.

[0042] The oil replenishment pipe 19 and the oil delivery pipe 12 are equipped with one-way valves, so that the lubricating oil can only enter the oil tank 11 and the fixed sleeve 7 through the oil replenishment pipe 19 and the oil delivery pipe 12 in one direction.

[0043] A method for manufacturing a boundary lubrication bearing, applicable to a boundary lubrication bearing, includes the following steps:

[0044] S1: Prepare molds for components such as base 1, mounting seat 2, outer ring 3, inner ring 4 and bearing 5, and prepare related components according to the molds. The bearing 5 is made of high-quality low carbon steel as the base, with sintered spherical porous bronze powder in the middle, which is firmly embedded with surface modified polyoxymethylene, and oil storage pits are rolled on the surface to prepare the bearing 5. The base 1, mounting seat 2, outer ring 3 and inner ring 4 are prepared using bearing steel. Insert block 16 is welded to the outer wall of inner ring 4. The mounting seat 2, outer ring 3, inner ring 4 and bearing 5 are assembled structures. The corresponding two halves of the components form a complete circumference after assembly.

[0045] S2: Use a drilling and milling machine to drill and slot holes at corresponding positions on the surface of each component to facilitate the installation of subsequent components;

[0046] S3: Weld the oil supply pipe 12 to the outer wall of the fixed sleeve 7 and insert the oil supply pipe 12 into the mounting base 2. Then weld the fixed sleeve 7 into the groove opened on the inner wall of the outer ring 3 and connect the movable block 8 inside the fixed sleeve 7 to the inner ring 4.

[0047] S4: Assemble the remaining mounting base 2, outer ring 3, inner ring 4 and bearing 5.

[0048] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A boundary lubrication bearing, comprising a base (1), a mounting seat (2) and a bearing bush (5), characterized in that: The inner wall of the mounting seat (2) is provided with an outer ring (3), the inner wall of the outer ring (3) is rotatably provided with an inner ring (4), a fixed sleeve (7) is welded in a groove provided in the inner wall of the outer ring (3), a movable block (8) is movably provided on the inner wall of the fixed sleeve (7), one end of the movable block (8) is connected to the outer wall of the inner ring (4) via a connecting mechanism, the inner wall of the mounting seat (2) is provided with a lubricating oil hydraulic mechanism and a lubricating oil replenishing mechanism, the lubricating oil hydraulic mechanism is connected to the interior of the fixed sleeve (7), the outer wall of the bearing (5) is provided with a connecting pipe (14), after the inner ring (4) rotates to the lubricating oil replenishing mechanism, the connecting pipe (14) connects the oil circuit to the interior of the bearing (5), and the mounting seat (2), the outer ring (3), the inner ring (4) and the bearing (5) are all upper and lower two-section combined structures; The lubricating oil hydraulic mechanism comprises an oil delivery pipe (12) and a first sealing ring (13); one end of the oil delivery pipe (12) is connected to the interior of the fixed sleeve (7); and the first sealing ring (13) is provided between the bottom of the oil delivery pipe (12) and the mounting seat (2); The lubricating oil replenishing mechanism comprises an oil hole (17) and a second sealing ring (18); the outer ring (3) and the mounting seat (2) are provided with the oil hole (17) on their surfaces, and the second sealing ring (18) is provided inside a boss on the inner wall of the oil hole (17); The connection mechanism comprises a through hole (9) and a damping plug post (10); one end of the movable block (8) and the surface of the inner ring (4) are provided with a through hole (9); the inner wall of the through hole (9) is provided with a damping plug post (10); and the movable block (8) is connected to the inner ring (4) via the damping plug post (10).

2. A boundary lubrication bearing according to claim 1, characterized in that: An oil groove (11) is provided inside the base (1), and an oil replenishing pipe (19) is provided on the side wall of the mounting seat (2), wherein the oil replenishing pipe (19) is in communication with the internal oil groove (11).

3. The boundary lubrication bearing according to claim 1, characterized in that: The connecting tube (14) comprises a fixed tube (141), a spring (142), a movable tube (143) and a blocking net (144); the outer wall of one of the upper and lower bearing shells (5) is penetrated by a fixed tube (141); one end of the fixed tube (141) is connected to the interior of the bearing shell (5); and a blocking net (144) is provided on the inner wall of the fixed tube (141); the other end of the fixed tube (141) is provided with a spring (142); one end of the spring (142) is connected to a movable tube (143); and one end of the movable tube (143) extends outward from a through groove provided on the surface of the inner ring (4).

4. The boundary lubrication bearing according to claim 1, characterized in that: The inner wall of the outer ring (3) is provided with a slot (15), the outer wall of the inner ring (4) is provided with an insert block (16), the inner wall of the inner ring (4) is provided with a positioning groove (6), and the outer wall of the bearing shell (5) is provided with a positioning block matching the positioning groove (6).

5. The boundary lubrication bearing according to claim 1, characterized in that: A set of bolt fixing holes (20) are formed through the outer wall of the mounting seat (2).

6. A method for preparing a boundary lubrication bearing, applied to a boundary lubrication bearing as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: S1: preparing a mold of components related to the base (1), the mounting seat (2), the outer ring (3), the inner ring (4) and the bearing (5), and preparing related components according to the mold. The bearing (5) is based on high-quality low-carbon steel, sintered with spherical porous bronze powder in the middle, firmly embedded with surface-modified polyoxymethylene, and rolled with an oil storage pit on the surface to prepare the bearing (5). The base (1), the mounting seat (2), the outer ring (3) and the inner ring (4) are prepared using bearing steel. The plug (16) is welded on the outer wall of the inner ring (4). The mounting seat (2), the outer ring (3), the inner ring (4) and the bearing (5) are structures that can be assembled. The corresponding two halves of the components form a complete circumference after assembly. S2: Drilling and milling machines are used to make holes and grooves at corresponding positions on the surfaces of each component to facilitate the installation of subsequent components; S3: welding an oil delivery pipe (12) to the outer wall of the fixed sleeve (7), and inserting the oil delivery pipe (12) into the mounting seat (2), then welding the fixed sleeve (7) to the groove formed on the inner wall of the outer ring (3), and connecting the movable block (8) inside the fixed sleeve (7) to the inner ring (4); S4: Assemble the remaining mounting seat (2), outer ring (3), inner ring (4) and bearing shell (5).

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