CN113404780B

CN113404780B - Bearing bush stop device

Info

Publication number: CN113404780B
Application number: CN202110517910.7A
Authority: CN
Inventors: 凌黎; 张亚宾; 李凯; 朱杰; 周少华; 张起楼; 胡朝辉
Original assignee: Hunan Chongde Technology Co ltd
Current assignee: Hunan Chongde Technology Co ltd
Priority date: 2021-05-12
Filing date: 2021-05-12
Publication date: 2022-06-28
Anticipated expiration: 2041-05-12
Also published as: CN113404780A

Abstract

The invention discloses a bearing bush stopping device which comprises a bearing seat, a bearing bush and a stopping sliding block, wherein the bearing seat comprises an upper seat and a lower seat, the opposite wall surfaces of the upper seat and the lower seat are provided with arc surfaces, the upper seat and the lower seat are combined in a plane, two sides of the arc surface of the lower seat are respectively provided with at least one sliding groove downwards from a splicing surface, the upper seat and the lower seat are spliced to form an accommodating cavity, the accommodating cavity is internally provided with the stopping sliding block, the lower seat is provided with the bearing bush matched with the arc surfaces, and the arc surface of the bearing bush is additionally provided with a platform matched with the stopping sliding block to limit the movement of the bearing bush through the contact between the platform and the stopping sliding block. The bearing bush stopping device provided by the invention can prevent the phenomena that the rotation and the vibration of the bearing bush cause the friction and the collision of the contact surface of the bearing bush and the bearing seat to generate abrasion.

Description

Bearing bush stop device

Technical Field

The invention relates to the field of bearings, in particular to a bearing bush stop device.

Background

The sliding bearing is a machine which can realize low friction and low noise by generating a dynamic pressure oil film through relative sliding to isolate moving and static components. The existing sliding bearing generally adopts spherical contact fit between a bearing bush and a bearing seat, the spherical size of the bearing bush is slightly smaller than that of the bearing seat, the bearing bush can rotate freely in the bearing seat to adapt to the conditions of bending (particularly a flexible shaft) caused by gravity after a rotating shaft is placed in an inner hole of the bearing bush, inclination and the like caused by the fact that bearings at two ends are not installed eccentrically, the parallelism between the inner hole of the bearing bush and the rotating shaft is improved, in order to facilitate installation and adapt to uncertain rotation amount in the posture of the rotating shaft, a set of pin hole anti-rotation structure with large clearance is arranged between the bearing seat and the bearing bush, the anti-rotation capability is very limited, when the bearing is started under heavy load, an oil film does not form a front rotating shaft, the bearing bush can be driven to rotate to cause friction and abrasion of a contact surface of the bearing bush and the bearing bush can not fully inhibit vibration of the bearing bush due to the size with a slight difference, and the bearing bush can resonate under the acting force of a rotor, and the bearing seat is collided and abraded.

Disclosure of Invention

The invention mainly aims to provide a bearing bush stopping device, and aims to solve the technical problems.

In order to achieve the purpose, the bearing bush locking device provided by the invention comprises a bearing block, a bearing bush and a locking sliding block, wherein the bearing block comprises an upper seat and a lower seat, the opposite wall surfaces of the upper seat and the lower seat are provided with arc-shaped surfaces, the upper seat and the lower seat are combined in a plane, two sides of the arc-shaped surface of the lower seat are respectively provided with at least one sliding groove downwards from a splicing surface, the upper seat and the lower seat are spliced to form an accommodating cavity, the locking sliding block is arranged in the accommodating cavity, the bearing bush matched with the arc-shaped surface is arranged on the lower seat, and a platform in adaptive contact with the locking sliding block is additionally arranged on the arc-shaped surface of the bearing bush so as to limit the movement of the bearing bush through the contact between the platform and the locking sliding block.

In one embodiment, the size of the notch of the chute is smaller than the width of the groove body of the chute.

In one embodiment, a first included angle is formed between a perpendicular line of a plane where the platform is located and the axis of the bearing bush, and a second included angle is formed between the plane where the platform is located and a horizontal plane.

In one embodiment, the stopping slider comprises a sliding block and a ball head arranged at the front end of the sliding block, and the ball head is used for abutting against the platform.

In an embodiment, the locking slider further comprises a spring and a jaw, a through groove is formed in the rear end of the slider body, shaft holes are formed in two opposite wall surfaces of the through groove, a pin shaft penetrates through the shaft holes, the middle of the jaw is sleeved on the pin shaft, the spring is inserted into one end of the jaw, one side, close to the ball head, of the through groove is provided with a supporting platform, and the free end of the spring is supported on the supporting platform.

In an embodiment, the jack catch includes spring arm, installation department and the self-locking arm that connects gradually, the pivot hole has been seted up on the installation department, the round pin axle is worn to establish in the installation department, the spring arm cartridge has the spring, the self-locking arm with the spring arm can wind the axle center relative rotation in pivot hole.

In an embodiment, the spring arm includes a hook portion and a connecting portion, two ends of the connecting portion are respectively connected to the hook portion and the mounting portion, and the hook portion is perpendicularly connected to the connecting portion.

In one embodiment, the upper surface of the sliding block is provided with a plurality of oil discharge grooves.

In one embodiment, the oil drainage groove extends from one side of the sliding block close to the ball head to the direction of the through groove but is not communicated with the through groove.

According to the technical scheme, the bearing seat comprises an upper seat and a lower seat, arc-shaped surfaces are arranged on the wall surfaces of the upper seat and the lower seat, which face each other, the upper seat and the lower seat are in plane contact, at least one sliding groove is additionally formed in the two sides of the arc-shaped surface of the lower seat from the splicing surface downwards, and the stopping sliding block is arranged in the sliding groove. According to the technical scheme, after the rotating shaft falls in place, the stopping sliding blocks slide along the grooves and are pressed against the platform end face of the bearing bush, the upper seat of the bearing block is fixed after falling down, the upper seat and the lower seat seal the sliding groove, rotation or vibration of the bearing bush can be stopped by the stopping sliding blocks in a self-locking state, and therefore the phenomenon that the bearing bush is abraded due to friction and collision of the contact surface of the bearing bush and the bearing block caused by rotation and vibration of the bearing bush can be avoided.

Drawings

In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a partial schematic structural view of a bearing shell retaining device according to an embodiment of the invention;

FIG. 2 is a schematic structural diagram of a lower base according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a chute of an embodiment of the invention;

FIG. 4 is a schematic structural diagram of a bearing shell according to an embodiment of the present invention;

figure 5 is a top view of a bearing shell according to an embodiment of the present invention;

figure 6 is a cross-sectional view of a bearing shell according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of a stop slider according to an embodiment of the present invention;

FIG. 8 is a schematic view of the internal structure of the stop slider according to the embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a self-locking arm according to an embodiment of the present invention;

FIG. 10 is a diagram illustrating an idealized force analysis of the self-locking arm in accordance with an embodiment of the present invention;

FIG. 11 is a diagram illustrating a stress analysis of the self-locking arm according to an embodiment of the present invention.

The reference numbers illustrate: 10. a lower seat; 11. an arc-shaped surface; 12. a chute; 20. a stop slider; 21. a slider; 22. a ball head; 23. a spring; 24. a claw; 241. a spring arm; 2411. a hook portion; 2412. a connecting portion; 242. an installation part; 243. a self-locking arm; 25. a rotating shaft hole; 26. against the platform; 27. an oil discharge groove.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Moreover, the technical solutions in the embodiments of the present invention may be combined with each other, but it is necessary to be able to be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

The invention provides a bearing bush stop device.

As shown in fig. 1-2 and 4, a bearing bush locking device provided in an embodiment of the present invention includes a bearing bush, a bearing bush 30, and a locking slider 20, where the bearing bush includes an upper seat and a lower seat 10, an arc surface 11 is formed on a wall surface of the upper seat and the lower seat 10 facing each other, the upper seat and the lower seat 10 are combined in a plane, at least one sliding groove 12 is added from a split surface to a lower side on both sides of the arc surface 11 of the lower seat, an accommodating cavity is formed after the upper seat and the lower seat 10 are split, the locking slider 20 is disposed in the accommodating cavity, the bearing bush 30 adapted to the arc surface 11 is disposed on the lower seat 10, and a platform 31 adapted to the locking slider 20 is added on the arc surface of the bearing bush 30 to limit movement of the bearing bush 30 through contact between the platform 31 and the locking slider 20.

In this embodiment, the bearing seat includes an upper seat and a lower seat 10, an arc surface 11 is disposed on a wall surface of the upper seat and the lower seat 10 facing each other, at least one sliding slot 12 is disposed on both sides of the arc surface 11 of the lower seat 10, a locking slider 20 is disposed in the sliding slot 12, a bearing bush 30 adapted to the arc surface 11 is disposed on the lower seat 10, a platform 31 adapted to the sliding slot 12 is disposed on one side of the bearing bush 30 facing the arc surface 11, the platform 31 is adapted to the sliding slot 12 and the upper bearing seat to form an accommodating cavity, and the locking slider 20 is disposed in the accommodating cavity. In the technical scheme, after the rotating shaft falls in place, the stopping slide blocks 20 slide along the grooves respectively and the stopping slide blocks 20 are propped against the end surfaces of the platforms 31 of the bearing bushes 30, the upper seat of the bearing block is fallen and fixed, then the upper seat and the lower seat 10 seal the sliding grooves 12, the rotation or vibration of the bearing bushes 30 can be stopped by the stopping slide blocks 20 in a self-locking state, and the phenomenon that the contact surfaces of the bearing bushes 30 and the bearing block are abraded due to friction and collision is prevented. The number of the sliding grooves 12 can be increased as required, so that the bearing bushes 30 of other models can be adapted to better prevent the bearing bushes 30 from rotating and vibrating.

Referring to fig. 3, the size of the notch of the sliding chute 12 is smaller than the width of the groove body of the sliding chute 12. In an alternative embodiment, the slot opening is sized smaller than the slot width to prevent the retaining slide 20 from falling out of the slide slot 12 during handling and installation of the bearing housing, thereby improving its reliability.

Referring to fig. 5 and 6, a first included angle is formed between a perpendicular line of a plane where the platform 31 is located and the bearing axis, and a second included angle is formed between the plane where the platform 31 is located and a horizontal plane. Two platforms 31 are arranged on the bearing bush 30, the two platforms 31 on the bearing bush 30 are in oblique symmetry and have a certain included angle with the axis of the rotating shaft, and have a certain inclination angle with the horizontal plane, the rotation and the vibration of any direction of the bearing bush 30 can generate displacement in the normal direction of the platform 31, and when the bearing bush is used on an insulating bearing, the insulation between the bearing bush 30 and a bearing seat can be kept by a mode of opening a counter bore and embedding hard insulating materials such as phenolic laminates.

Referring to fig. 7 and 8, the stopping slider 20 includes a sliding block 21 and a ball 22 disposed at a front end of the sliding block 21, and the ball 22 is configured to abut against the platform 31. In this embodiment, the shape of the stopping slider 20 is a rectangular parallelepiped, and one end of the stopping slider 20 is provided with a ball 22, so that the stopping slider 20 can be ensured to be in close contact with the platform 31 on the bearing bush 30.

The locking slider 20 further comprises a spring 23 and a jaw 24, a through groove is formed in the rear end of the slider 21, shaft holes are formed in two opposite wall surfaces of the through groove, a pin shaft penetrates through the shaft holes, the middle of the jaw 24 is sleeved on the pin shaft, the spring 23 is inserted into one end of the jaw 24, one side, close to the ball head 22, of the through groove is provided with a supporting platform 3126, and one end, far away from the jaw 24, of the spring 23 supports against the supporting platform 3126.

Referring to fig. 9, the jaw 24 includes a spring arm 241, an installation portion 242, and a self-locking arm 243 that are connected in sequence, the installation portion 242 is provided with a rotation shaft hole 25, the pin shaft penetrates through the installation portion 242, the spring arm 241 is inserted with the spring 23, and the self-locking arm 243 and the spring arm 241 can rotate around the axis of the rotation shaft hole 25 relatively. The spring arm 241 includes a hook 2411 and a connection part 2412, two ends of the connection part 2412 are respectively connected to the hook 2411 and the mounting part 242, and the hook 2411 is vertically connected to the connection part 2412.

In the embodiment, the upper seat and the lower seat 10 of the bearing seat form a closed sliding chute 12 after being closed, the stop sliding block 20 can only slide along the length direction of the sliding chute 12, and the sliding block can ensure that the platform 31 of the bearing bush 30 can be in close contact with the sliding block when the platform 31 is at any angle by using the ball head 22; the platform 31 of the bearing bush 30 has a certain included angle with the axis of the rotating shaft, the normal line of the platform 31 is not beyond the center of a sphere, and the platform 31 also has a certain inclination angle with the horizontal plane, so that when the bearing bush 30 rotates or vibrates in any direction, one of the platforms 31 generates positive displacement (outward) in the normal direction, the stop slider 20 in the self-locking state can stop the movement trend, and the stop slider 20 used in pairs can stop the rotation or vibration of the bearing bush 30 in any direction.

Referring specifically to fig. 10-11, during operation of the jaws 24, the jaws 24 are of a small size and have a negligible mass relative to the drive force received by the bearing shoes 30. The jaw 24 is subjected to stress analysis, in this case, the jaw 24 is only subjected to stress at two positions of the contact surface of the rotating shaft hole 25 and the self-locking arm 243 with the sliding chute 12, the matching of the rotating shaft hole 25 and the pin shaft is a hinge, additional torque cannot be generated, gravity is not counted by the jaw 24, and the jaw 24 is a typical two-force rod, namely, two forces are equal and opposite (see fig. 10). At this time, the force generated by the jaws 24 on the sliding groove 12 forms an angle with the normal line of the surface of the sliding groove 12, when the angle is small to a certain degree, the self-locking condition between the jaws 24 and the sliding groove 12 is met, no matter how large the driving force generated by the bearing bushes 30 is before the yield strength of the material is exceeded, the jaws 24 cannot move when the driving force is transmitted to the jaws 24 through the sliding blocks, and the yield strength of metal such as steel is large and is enough to resist the driving force of the bearing bushes 30.

In practical applications, the premise of ignoring the weight of the jaws 24 is that the driving force of the bearing bush 30 is large relative to the weight of the jaws, but the bearing bush 30 does not operate with a corresponding driving force, the weight of the bearing bush 30 is limited, a part of the bearings are still in an inclined and swinging state, the stop slider 20 is correspondingly in an inclined state, and the torque generated by the weight makes the jaws 24 have a tendency to rotate away from the contact chute 12, which is likely to cause the mechanism to fail, so the influence of the weight must be considered. The force analysis is carried out on the claw 24 under the inclined state of the stopping sliding block 20, in this case, the claw 24 is stressed at two positions of the contact surfaces of the rotating shaft hole 25 and the self-locking arm 243 with the sliding chute 12, the self-locking arm 243 is also influenced by gravity, the rotating shaft hole 25 is matched with the pin shaft to form a hinge, extra torque cannot be generated, the force arm gravity generates anticlockwise torque, in order to balance the mechanism, a clockwise torque needs to be introduced, a force arm is added and provided with a compression spring 23, the clockwise torque is generated by the elasticity of the compression spring 23, and the force arm is as short as possible because the increased force arm gravity torque is also the anticlockwise torque (see fig. 11). All the forces and moments are combined and simplified, and are necessarily a clockwise torque (from the spring 23) and a pair of forces generating anticlockwise torque, and at the moment, the angle between the force generated by the claw 24 on the sliding chute 12 and the normal line of the surface of the sliding chute 12 is smaller than the self-locking angle in the reason state, so that the self-locking condition between the claw 24 and the sliding chute 12 is met.

In addition, a plurality of oil discharge grooves 27 are formed on the upper surface of the slide block 21. In the present embodiment, by providing the plurality of oil drain grooves 27, it is possible to discharge the lubricating oil, the gas, and the like, thereby preventing the stopper slider 20 from being stuck when the bearing upper seat is lifted, and further preventing the bearing or the stopper slider 20 itself from being damaged by dropping.

Further, the oil discharge groove 27 extends from a side of the sliding block 21 close to the ball head 22 toward the direction of the through groove but does not communicate with the through groove. It is thus ensured that the friction between the claws 24 and the slide groove 12, which could cause a possible failure of the self-locking, is not reduced by the lubricating oil.

The working mode of the bearing bush stopping device is as follows: after the rotating shaft is in place and the bearing bush 30 rotates to adapt to the posture of the rotating shaft, the stop sliding blocks 20 slide along the grooves respectively and press the ball heads 22 against the end surfaces of the platforms 31 of the bearing bush 30 (or against the end surfaces of pins extending from the bearing bush 30 when necessary), the upper seat of the bearing seat is well fixed, the upper seat and the lower seat 10 form a closed sliding groove 12, and the rotation or the vibration of the bearing bush 30 can be stopped by the stop sliding blocks 20 in a self-locking state. When the bearing bush 30 is removed and replaced, the upper seat of the bearing block is opened, the short arm (spring arm) of the claw 24 in the stop slider 20 is pressed down and pulled to slide outwards, and the stop slider 20 is unlocked.

The invention cancels the original rotation-proof structure of the bearing bush 30 with large pin holes or wide slots, and eliminates the movable clearance originally caused by adapting to the manufacturing error, the inclination of the rotating shaft and the installation convenience.

The original interference top clearance structure is eliminated, and the overlarge clearance of the splicing surface caused by the vibration of the clamping bearing bush 30 is eliminated.

On the basis of keeping the function of the original structure, the bearing bush stopping device can completely stop the rotation and the vibration of the bearing bush 30, prevent abrasion, prolong the service life of the bearing, and simultaneously enhance the vibration inhibiting capability and improve the performance of the bearing.

The bearing has the advantages of simple structure, few parts and strong universality, and can be adopted by both single-spherical bearings and double-spherical bearings, and can be adopted by both end covers, seats, brackets and the like. According to the size of the stress, the bearings with different specifications can adopt different sizes, and a series of universal parts are easy to form.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A bearing bush stopping device is characterized by comprising a bearing seat, a bearing bush and a stopping sliding block, wherein the bearing seat comprises an upper seat and a lower seat, the opposite wall surfaces of the upper seat and the lower seat are provided with arc-shaped surfaces, the upper seat and the lower seat are combined in a plane, two sides of the arc-shaped surface of the lower seat are respectively provided with at least one sliding groove downwards from a splicing surface, a containing cavity is formed between the upper seat and the lower seat after being spliced and the sliding grooves, the containing cavity is internally provided with the stopping sliding block, the lower seat is provided with the bearing bush matched with the arc-shaped surface, and the arc-shaped surface of the bearing bush is additionally provided with a platform in adaptive contact with the stopping sliding block so as to limit the movement of the bearing bush through the contact between the platform and the stopping sliding block;

the locking slider comprises a sliding block and a ball head arranged at the front end of the sliding block, the ball head is used for being abutted to the platform, the locking slider further comprises a spring and a clamping jaw, a through groove is formed in the rear end of the sliding block body, shaft holes are formed in two opposite wall surfaces of the through groove, a pin shaft is arranged in the shaft holes in a penetrating mode, the middle of the clamping jaw is sleeved on the pin shaft, the spring is inserted into one end of the clamping jaw, the through groove is close to one side of the ball head and is abutted to the platform, and the free end of the spring is abutted to the platform.

2. The bearing shell retainer of claim 1, wherein the slot is a single-sided slot, and the slot has a dimension less than a width dimension of the slot body of the slot.

3. A bearing shell stop arrangement according to claim 1, wherein a first angle is provided between a perpendicular to the plane of the platform and the axis of the bearing shell, and a second angle is provided between the plane of the platform and a horizontal plane.

4. The bearing bush stop device of claim 1, wherein the locking claw comprises a spring arm, a mounting portion and a self-locking arm, the spring arm, the mounting portion and the self-locking arm are sequentially connected, a rotating shaft hole is formed in the mounting portion, the pin shaft penetrates through the mounting portion, the spring arm is inserted with the spring, and the self-locking arm and the spring arm can relatively rotate around an axis of the rotating shaft hole.

5. A bearing shell stop arrangement according to claim 4, wherein the spring arm comprises a hook portion and a connecting portion, the connecting portion having opposite ends connected to the hook portion and the mounting portion, respectively, the hook portion being connected perpendicular to the connecting portion.

6. A bearing shell stop device according to claim 5, wherein the upper surface of the sliding block is provided with a plurality of oil drainage grooves.

7. Bearing shell stop arrangement according to claim 6, wherein the oil drain groove extends from the side of the sliding block close to the ball head in the direction of the through groove but does not communicate with the through groove.