CN114183458A

CN114183458A - Sliding bearing

Info

Publication number: CN114183458A
Application number: CN202111370755.7A
Authority: CN
Inventors: 黄国栋; 王少秋
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2022-03-15

Abstract

The invention relates to the technical field of bearings, in particular to a sliding bearing which comprises a base, wherein the left end and the right end of the base are respectively provided with a screw hole, an upper top cover is attached to the upper part of the base, both sides of the upper top cover are provided with screw holes, the upper top part is movably connected with a rotating handle, the rotating handle is internally provided with an outer hole, a bolt passes through the screw holes on both sides of the base and the upper top cover and is connected with a nut, a gap is reserved between the bolt and both sides of the upper top cover and the base, the lower end of the upper top cover is attached to an upper end cover, the lower part of the upper end cover is attached to a bearing body, the lower part of the bearing body is attached to a lower end cover, the middle part of the bearing body is provided with a transverse shaft and is connected with the rotating shaft, when the bearing starts to rotate, the bearing can conveniently start to rotate, in addition, the process of the rotation of the bearing is blocked or stopped to unscrew the nut, the bolt is taken out from the base, then the bearing is taken out, and the condition of the bearing is conveniently checked, the maintenance and the maintenance are convenient, and the service life of the bearing and the service cycle of single work are prolonged.

Description

Sliding bearing

Technical Field

The invention relates to the technical field of bearings, in particular to a sliding bearing.

Background

Along with the development of society, higher requirement has been put forward to the use of bearing in the production, and the main effect of bearing is that the support machinery rotates, guarantees the friction coefficient of machinery in the rotation process, guarantees rotation efficiency, but the bearing that has now exists the slide bearing integration in the use, exists bearing and base integration production, and it is inconvenient to later stage maintenance dismantlement, is unfavorable for maintenance use, in addition produces heat at the rotatory in-process of slide bearing, influences the life of slide bearing greatly.

Disclosure of Invention

The present invention provides a sliding bearing in view of the problems in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a sliding bearing, the on-line screen storage device comprises a base, a screw has respectively been seted up at both ends about the base, and the base top laminating top cap, it has all opened the screw to go up the top cap both sides, and go up top swing joint turning handle, place the outer hole in the turning handle in, the bolt passes the screw coupling nut of base and last top cap both sides, and the bolt passes the base and leaves the clearance with last top cap both sides, go up top cap lower extreme laminating upper end cover, the upper end cap below laminating bearing body, bearing body below laminating lower end cover, the bearing body middle part sets up the cross axle, and connect in the pivot, wherein:

preferably, the regulating bolt is connected to the turning handle below, and the meshing of regulating bolt below changes the tooth, and the regulating bolt passes and changes the tooth and link to each other with the dead lever, and the dead lever links to each other with the carriage release lever, and the carriage release lever outside is provided with round rigid spring, and on the fixed block was arranged in to the rigid spring lower extreme, the fixed block middle part was established one row of spout by last under to, and the carriage release lever bottom is placed in the spout.

Preferably, an outer hole is formed in the middle of the upper end cover, an upper semicircular ring is arranged inside the upper end cover, the lower end cover is connected below the upper end cover, a lower semicircular ring is arranged inside the lower end cover, and ports on two sides of the upper semicircular ring are inserted into ports of the lower semicircular ring.

Preferably, an inner ring wall is arranged inside the upper semicircular ring, an outer ring wall is arranged outside the inner ring wall, a support frame is arranged inside the inner ring wall and the inner ring wall, and a lubricating structure is arranged between the inner ring wall and the inner ring wall.

Preferably, the lubricating structure top sets up the horizontal pole, and the connecting rod is connected to the horizontal pole below, and the oil-out has been seted up to connecting rod top both sides, and the bottom both sides set up the oil inlet, and the connecting rod middle part sets up the gasbag, and the push rod is connected to the connecting rod bottom, and the push rod both ends set up branch, and push rod and branch link to each other through replying the spring, the fixed extension spring in branch both ends top, and end block is connected at the extension spring top, and the connecting rod is hugged closely to end block both sides, and the oil-out of just laminating, horizontal pole laminating bearing body.

Preferably, the bearing body is arranged between the upper semicircular ring and the lower semicircular ring, a central shaft is arranged in the middle of the bearing body, a rotating shaft is connected to the extending part outside the central shaft, and the outer side of the rotating shaft is sleeved with the fan blade.

The invention has the beneficial effects that:

(1) the invention is characterized in that the base and the upper top cover are detached independently and can be installed independently, a bolt penetrates through a hole at the bottom of the base and penetrates out of a hole of the upper top cover, then the bolt is screwed tightly by a nut and is fixed at two sides of the upper top cover, then, when the bearing starts to rotate, the bearing is convenient to rotate between the upper end cover and the lower end cover, in addition, the nut can be unscrewed when the bearing is clamped or stops rotating in the rotating process, the bolt is taken out of the base, and then the bearing is taken out, so that the condition of the bearing is convenient to check, the maintenance and the repair are convenient, the service life of the bearing is prolonged, and the service cycle of single work is prolonged.

(2) When the bearing is used, the problem that the bearing generates heat during rotation is solved, the rotating shaft is connected with the fixed shaft at the center of the rotating bearing, the fan blades on the outer side of the rotating shaft are driven when the bearing rotates, wind is generated by the rotating fan blades to cool the outer part of the bearing, oil in a lubricating mechanism is used for cooling the inner surface of the bearing, the cross rod is extruded by the annular surface in the bearing, the air bag is extruded by the end block to release gas, the gas enters the connecting rod to push the oil in the connecting rod to enter the annular surface of the bearing from the oil outlet, the annular surface is fully lubricated, the annular surface can be effectively lubricated, and on the other hand, heat absorption can also be performed. The life cycle of the bearing can be increased.

Drawings

The invention is further illustrated in the following figures and examples.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a cross-sectional view of the entirety shown in FIG. 1;

FIG. 3 is a schematic view of the upper and lower end caps and bearing shown in FIG. 1;

fig. 4 is a schematic view of a fan blade structure shown in fig. 1;

FIG. 5 is a schematic view of the upper and lower semi-circular rings shown in FIG. 1;

FIG. 6 is a schematic view of the inner annular wall mechanism shown in FIG. 1;

FIG. 7 is an enlarged view of FIG. 6 at B;

FIG. 8 is an enlarged view of FIG. 5 at A;

in the figure: 1. a base; 2. a top cover is arranged; 3. a bearing; 4. a nut; 5. a bolt; 6. rotating the handle; 7. adjusting the bolt; 8. an upper end cover; 9. a lower end cover; 11. an outer bore; 12. a rotating shaft; 13. a fan blade; 10. a central shaft; 14. an upper semicircular ring; 141. an inner annular wall; 142. an outer annular wall; 143. a support frame; 15. a lubrication mechanism; 15. a lower semicircular ring; 151. a cross bar; 152. a connecting rod; 153. an oil outlet; 154. an air bag; 155. an oil inlet; 156. a push rod; 157. a return spring; 158. an extension spring; 159. a strut; 160. an end-block; 61. rotating the teeth; 62. fixing the rod; 63. a travel bar; 64. a rigid spring; 65. a fixed block; 66. a chute.

Detailed Description

In order to achieve the technical means, the creation features, the achievement purposes and the effects of the invention, which are easy to understand, the following description is further combined with the specific embodiments.

As shown in fig. 1-8, the sliding bearing of the present invention comprises a base 1, wherein a screw hole is respectively formed at each of the left and right ends of the base 1, an upper top cover 2 is attached to the upper side of the base 1, screw holes are formed at both sides of the upper top cover 2, the upper top is movably connected with a rotating handle 6, the rotating handle 6 is internally disposed in an outer hole 11, a bolt 5 penetrates through the screw holes at both sides of the base 1 and the upper top cover 2 to connect nuts 4, the bolt 5 penetrates through both sides of the base 1 and the upper top cover 2 to leave a gap, the lower end of the upper top cover 2 is attached to an upper end cover 8, a bearing body 3 is attached to the lower side of the upper end cover 8, a lower end cover 9 is attached to the lower side of the bearing body 3, a cross shaft is arranged at the middle part of the bearing body 3 and connected to a rotating shaft 12, wherein:

specifically, the adjusting bolt 7 is connected to the turning handle 6 below, the meshing of adjusting bolt 7 below is changeed tooth 61, the adjusting bolt 7 passes and changes tooth 61 and link to each other with the dead lever 62, dead lever 62 and carriage release lever 63 link to each other, the carriage release lever 63 outside is provided with round rigid spring 64, rigid spring 64 lower extreme is arranged in on the fixed block 65, fixed block 65 middle part is established one row of spout 66 by upper to lower, carriage release lever 63 bottom is placed in spout 66. During operation, the adjusting bolt 7 can be controlled by rotating the handle 6, the adjusting bolt 7 is engaged with the rotating tooth 61 in the upper end cover 8, so that the lower end of the adjusting bolt 7 can push the fixed rod 62 to drive the fixed rod 62 to move downwards, and then the fixed rod 62 pushes the movable rod 63 to move downwards, so that the movable rod 62 can start to slide downwards along the sliding slot 66 in the middle of the fixed block 65, the upper end of the rigid spring 64 wound on the outer side of the movable rod 63 is in a movable state at the original position, the lower end of the rigid spring is attached to the fixed block 65, when the movable rod 63 is driven by the fixed rod 62 to slide downwards, the top of the rigid spring 64 wound on the outer side of the movable rod 63 is pressed by the fixed rod 62, the rigid spring 64 starts to move downwards along the outer wall of the movable rod 63, and during downward movement of the rigid spring 64 due to the attachment of the bottom of the rigid spring 64 to the fixed block 65, the fixed rod 62 pushes the rigid spring 64 to press downwards, the fixing block 65 is abutted against the rigid spring 64, so that in the process that the rigid spring 64 moves downwards along with the fixing rod 62, the rigid spring 64 is in a contraction state, at the moment, the moving rod 63 moves to the bottom along the sliding groove 66, the adjusting bolt 7 continues to be meshed with the rotating tooth 61 along with the continuous rotation of the rotating handle 6, the fixing rod 62 continues to move downwards to drive the moving rod 63 to move downwards, and until the moving rod 63 can push the two ends of the upper semicircular ring 14 into the lower semicircular ring 15, so that the upper semicircular ring 14 moves downwards to a proper position, and the bearing body 3 is convenient to rotate.

Specifically, an outer hole 11 is formed in the middle of the upper end cover 8, an upper semicircular ring 14 is arranged inside the upper end cover 8, the lower end cover 9 is connected below the upper end cover 8, a lower semicircular ring 15 is arranged inside the lower end cover 9, and ports on two sides of the upper semicircular ring 14 are inserted into ports of the lower semicircular ring 15. During specific work, the lower end cover 9 is placed in the circular recess in the middle of the base 1, the bearing body 3 is placed in the lower end cover 9, clamping grooves in two ends of the bearing body 3 abut against two ends of the lower end cover 9, the upper end cover 8 is placed on the bearing body 3, the upper end cover 2 is placed on the upper end cover 8, at the moment, the rotating handle 6 can be inserted into the upper end cover 2 and starts to rotate, the adjusting bolt 7 in the lower end of the rotating handle 6 can be meshed with the rotating teeth 61 in the upper end cover 8, and then two ports of the upper semicircular ring 14 can be moved downwards under the action of the rotating handle 6, so that the ports on two sides of the upper semicircular ring 14 enter the lower semicircular ring 15.

Specifically, an inner annular wall 141 is disposed inside the upper semicircular ring 14, an outer annular wall 142 is disposed outside the inner annular wall 141, a supporting frame 143 is disposed inside the inner annular wall 141 and the inner annular wall 141, and the lubrication structure 15 is disposed between the inner annular wall 141 and the inner annular wall 142. During specific work, when the rotating handle 6 starts to rotate downwards, the outer annular wall 142 of the lower semicircular ring 15 is pushed by the moving rod 63 at the lower end, so that the outer annular wall 142 starts to be stressed and moves downwards, and due to the effect of the stable supporting frame 143 in the outer annular wall 142, the outer annular wall 142 is under the effect of downward pressure, and under the effect of the supporting frame 143, the downward pressure can be transmitted to the inner annular wall 141, and the moving rod 63 continuously moves downwards to continuously push the outer annular wall 142, so that the inner annular wall 141 continuously moves inwards, and at this time, the lubricating mechanism 15 located between the inner annular wall 141 and the outer annular wall 142 starts to be in contact with the bearing body 3.

Specifically, a cross rod 151 is arranged at the top of the lubricating structure 15, a connecting rod 152 is connected below the cross rod 151, oil outlets 153 are formed in two sides of the top of the connecting rod 152, oil inlets 155 are formed in two sides of the bottom end of the connecting rod 152, an air bag 154 is arranged in the middle of the connecting rod 152, a push rod 156 is connected to the bottom of the connecting rod 152, supporting rods 159 are arranged at two ends of the push rod 156, the push rod 156 is connected with the supporting rods 159 through a return spring 157, an extension spring 158 is fixed above two ends of the supporting rods 159, the top of the extension spring 158 is connected with an end block 160, two sides of the end block 160 are tightly attached to the connecting rod 152 and attached to the oil outlets 153, and the cross rod 151 is attached to the bearing body 3. During specific work, when the bearing body 3 starts to rotate, because the bearing body 3 is close to the inner annular wall 141, when the bearing body 3 rotates, because the bearing body 3 swings, the outer circular ring surface of the bearing body 3 can be extruded to the cross rod 151 at the upper end of the lubricating mechanism 15 during rotation, so that the cross rod 151 starts to be extruded towards the inside, the connecting rod 152 is pushed to move downwards, because the rotating speed of the bearing body 3 is high, the extruding speed of the outer circular ring surface of the bearing body 3 is too high, the downward pressure on the cross rod 151 is too high, the downward moving speed and the pressure of the connecting rod 152 are high, the push rod 156 connected with the lower end of the connecting rod 152 can extrude the supporting rod 159 at a fast speed, so that the supporting rod 159 moves downwards fast, in addition, because the end block 160 connected with the tension spring 158 can carry the end block 160 to move downwards during the downward movement of the supporting rod 159, because in a static state, the inner side of the end block 160 is abutted against the oil outlet 153, then when the bearing body 3 rotates, the cross bar 151 is pressed to drive the push rod 156 to press the support rod 159, so that the end block 160 starts moving downwards, the outer side of the end block 160 slides against the notch, when the inner side of the end block 160 slides to the air bag 154, the air bag 154 starts to be pressed, air in the air bag 154 is filled in the connecting rod 152, released air starts to press oil, the oil is pushed to move towards the oil outlet 153, then the oil in the outer annular wall 142 starts to enter the oil inlet 155, the oil outlet 153 is in an open state because the end block 160 and the air bag 154 are in contact, therefore when the end block 160 presses the air bag 154, the oil in the connecting rod 152 quickly flows towards the oil outlet 153, in addition, in the downward moving process of the end block 160, the tension spring 158 starts to contract, when the end block 160 moves to the moving position, the tension spring 158 which contracts starts to push the end block 160 upwards, the end block 160 is returned to the initial position to abut against the oil outlet 153, before the rod 152 starts to push the rod 159 to move downwards, the push rod 156 and the bottom of the rod 159 are connected with the return spring 157, the return spring 157 starts to stretch from the initial rotation state while the rod 159 moves downwards rapidly, the return spring 157 starts to contract when the rod 159 stretches the return spring 157 to the maximum, the return spring 157 starts to drive the rod 159 to move upwards, the rod 159 simultaneously pushes the extension spring 158 to move upwards, and the extension spring 158 drives the end block 160 to move upwards.

Specifically, place in the bearing body 3 between semicircle ring 15 under last semicircle ring 14 and lower semicircle ring 17 in, and set up center pin 10 in the middle of the bearing body 3, the outside extension of center pin 10 connects pivot 12, the fan blade 13 is cup jointed in the pivot 12 outside. When the bearing body 3 is arranged between the upper end cover 8 and the lower end cover 9, under the action of the rotating handle 6, the bearing body 3 is abutted against the inner annular wall 141 in the upper semicircular ring 14 inside the upper end cover 8, in addition, a fixed shaft is arranged at the central position of the bearing body 3 and penetrates through the bearing body 3, one end of the fixed shaft is connected with the rotating shaft 12, the fan blades 13 are fixed on the outer side of the rotating shaft 12, when the bearing body 3 works, the bearing body 3 drives the fixed shaft at the central position of the bearing body 3, when the fixed shaft starts to rotate, the rotating shaft 12 sleeved on the fixed shaft rotates together with the fixed shaft, and because the fan blades 13 are connected on the outer side of the rotating shaft 12, the fan blades 13 start to rotate along with the rotation of the rotating shaft 12, and when the fan blades 13 rotate, the bearing body 3 can be cooled simultaneously.

The working principle of the sliding bearing provided by the invention is as follows: firstly, a lower end cover 9 is placed in a circular recess in the middle of a base 1, then a bearing body 3 is placed in the lower end cover 9, clamping grooves at two ends of the bearing body 3 abut against two ends of the lower end cover 9, then an upper end cover 8 is placed on the bearing body 3, then the upper end cover 2 is placed on the upper end cover 8, at the moment, a rotating handle 6 can be inserted from the upper end cover 2 and then starts to rotate, so that an adjusting bolt 7 at the lower end of the rotating handle 6 can be meshed with a rotating tooth 61 inside the upper end cover 8, and then two ports of an upper semicircular ring 14 can be moved downwards under the action of the rotating handle 6, and the ports at two sides of the upper semicircular ring 14 enter a lower semicircular ring 15. The adjusting bolt 7 can be controlled by rotating the handle 6, the adjusting bolt 7 is engaged with the rotating tooth 61 in the upper end cover 8 by rotation, so that the lower end of the adjusting bolt 7 can push the fixed rod 62 to move the fixed rod 62 downwards, and then the fixed rod 62 pushes the movable rod 63 to move downwards, so that the movable rod 62 can start to slide downwards along the sliding slot 66 in the middle of the fixed block 65, while the rigid spring 64 wound on the outer side of the movable rod 63 is in an original position, the upper end of the rigid spring is in a movable state, the lower end of the rigid spring is attached to the fixed block 65, when the movable rod 63 is driven by the fixed rod 62 to slide downwards, the top of the rigid spring 64 wound on the outer side of the movable rod 63 is pressed by the fixed rod 62, the rigid spring 64 starts to move downwards along the outer wall of the movable rod 63, and during the downward movement of the rigid spring 64, the bottom of the rigid spring 64 is attached to the fixed block 65, the fixing block 65 is abutted against the rigid spring 64, so that in the process that the rigid spring 64 moves downwards along with the fixing rod 62, the rigid spring 64 is in a contraction state, at the moment, the moving rod 63 moves to the bottom along the sliding groove 66, the adjusting bolt 7 continues to be meshed with the rotating tooth 61 along with the continuous rotation of the rotating handle 6, the fixing rod 62 continues to move downwards to drive the moving rod 63 to move downwards, and until the moving rod 63 can push the two ends of the upper semicircular ring 14 into the lower semicircular ring 15, so that the upper semicircular ring 14 moves downwards to a proper position, and the bearing body 3 is convenient to rotate.

When the bearing body 3 starts to rotate, because the bearing body 3 is close to the inner annular wall 141, when the bearing body 3 rotates, because the bearing body 3 swings, the annular surface on the outer side of the bearing body 3 is pressed to the cross rod 151 at the upper end of the lubricating mechanism 15 when rotating, so that the cross rod 151 starts to be pressed towards the inside, the connecting rod 152 is pushed to move downwards, because the rotating speed of the bearing body 3 is high, the pressing speed of the annular surface on the outer side of the bearing body 3 is too high, the downward pressure applied to the cross rod 151 is too high, the downward moving speed and the pressure of the connecting rod 152 are high, the push rod 156 connected with the lower end of the connecting rod 152 presses the strut 159 at a fast speed, the strut 159 moves downwards quickly, in addition, because the end block 160 connected with the tension spring 158 enables the end block 160 to move downwards in the process of moving downwards, because in the static state, the inner side of the end block 160 is pressed against the oil outlet 153, then, when the bearing body 3 rotates, the cross bar 151 is pressed to drive the push rod 156 to press the support rod 159, so that the end block 160 starts to move downwards, the outer side of the end block 160 slides along the notch, when the inner side of the end block 160 slides to the air bag 154, the air bag 154 starts to be pressed, air in the air bag 154 is filled into the connecting rod 152, the released air starts to press oil, the oil is pushed to move towards the oil outlet 153, because the oil in the inner part is in the space between the outer annular wall 141 and the upper end cover 8, no matter when the machine is in a static state or in a working state, the oil can freely enter the oil inlet 155, because the end block 160 is in a contact with the air bag 154 at the moment, the oil outlet 153 is in an open state, when the end block 160 presses the air bag 154, the oil in the connecting rod 152 rapidly flows towards the oil outlet 153, and in the process that the end block 160 moves downwards, the tension spring 158 begins to contract, and when the end block 160 moves to the moving position, the contracted tension spring 158 begins to push the end block 160 upward, so that the end block 160 returns to the initial position against the oil outlet 153, before the link 152 begins to push the rod 159 downward, the push rod 156 and the bottom of the rod 159 are connected with the return spring 157, the return spring 157 begins to be stretched from the initial rotation state while the rod 159 rapidly moves downward, when the rod 159 stretches the return spring 157 to the maximum, the return spring 157 begins to contract, the return spring 157 begins to drive the rod 159 to move upward, the rod 159 simultaneously pushes the tension spring 158 upward, and the tension spring 158 drives the end block 160 upward.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A plain bearing characterized by: including base (1), a screw has respectively been seted up at both ends about base (1), and base (1) top laminating top cap (2), go up top cap (2) both sides and all open the screw, and go up top swing joint turning handle (6), place outer hole (11) in turning handle (6), screw coupling nut (4) of base (1) and last top cap (2) both sides are passed in bolt (5), and bolt (5) pass base (1) and last top cap (2) both sides and leave the clearance, go up top cap (2) lower extreme laminating upper end cover (8), upper end cover (8) below laminating bearing body (3), bearing body (3) below laminating lower end cover (9), bearing body (3) middle part sets up the cross axle, and connects in pivot (12).

2. A plain bearing according to claim 1, wherein: rotating handle (6) below and connecting adjusting bolt (7), adjusting bolt (7) below meshing changes tooth (61), adjusting bolt (7) pass and change tooth (61) and dead lever (62) and link to each other, dead lever (62) and carriage release lever (63) link to each other, the carriage release lever (63) outside is provided with round rigid spring (64), rigid spring (64) lower extreme is arranged in on fixed block (65), fixed block (65) middle part is by last to under establish one row of spout (66), carriage release lever (63) bottom is placed in spout (66).

3. A plain bearing according to claim 1, wherein: an outer hole (11) is formed in the middle of the upper end cover (8), an upper semicircular ring (14) is arranged inside the upper end cover (8), the lower end cover (9) is connected below the upper end cover (8), a lower semicircular ring (15) is arranged inside the lower end cover (9), and ports on two sides of the upper semicircular ring (14) are inserted into the port of the lower semicircular ring (15).

4. A plain bearing according to claim 3, in which: an inner annular wall (141) is arranged inside the upper semicircular ring (14), an outer annular wall (142) is arranged outside the inner annular wall (141), a support frame (143) is arranged inside the inner annular wall (141) and the inner annular wall (141), and a lubricating structure (15) is arranged between the inner annular wall (141) and the inner annular wall (142).

5. A plain bearing according to claim 4, in which: lubricating structure (15) top sets up horizontal pole (151), connecting rod (152) are connected to horizontal pole (151) below, oil-out (153) have been seted up to connecting rod (152) top both sides, and the bottom both sides set up oil inlet (155), and connecting rod (152) middle part sets up gasbag (154), push rod (156) are connected to connecting rod (152) bottom, push rod (156) both ends set up branch (159), push rod (156) and branch (159) link to each other through answer spring (157), fixed extension spring (158) in branch (159) both ends top, end block (160) are connected at extension spring (158) top, connecting rod (152) are hugged closely to end block (160) both sides, and laminate oil-out (153), and bearing body (3) are laminated to horizontal pole (151).

6. A plain bearing according to claim 5, in which: place in bearing body (3) between last semicircle ring (14) and lower semicircle ring (15), and set up center pin (10) in the middle of bearing body (3), center pin (10) outside extension department connects pivot (12), fan blade (13) are cup jointed in the pivot (12) outside.