Self-lubricating plastic bearing

Abstract

The utility model provides a self-lubricating plastic bearing and belongs to the technical field of bearings. The problem of poor stability in the prior art is solved. The self-lubricating plastic bearing comprises an outer ring and an inner ring which are made of plastic materials, the inner ring is sleeved with the outer ring, the outer side of the inner ring is connected with a plurality of self-lubricating columns in the circumferential direction of the inner ring, the self-lubricating columns abut against the inner side of the outer ring, the section of the outer side of the inner ring is in an arc shape, and the inner side of the outer ring is provided with a contact part matched with the outer side of the inner ring. The self-lubricating column on the outer side of the inner ring abuts against the contact portion, and the side portion of the outer ring is provided with a disconnected notch. The self-lubricating plastic bearing is high in stability.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings and relates to a self-lubricating plastic bearing. Background Art

[0002] A self-lubricating bearing is a bearing that can achieve lubrication without external lubricant during operation.

[0003] This kind of bearing ensures good lubrication effect during long-term operation by embedding lubricant in the material or using self-lubricating material, so as to reduce friction, wear and maintenance cost. Self-lubricating bearings are widely used in various industrial and mechanical fields, especially suitable for use in environments where it is difficult to add lubricant frequently.

[0004] The existing self-lubricating bearings are usually of integral structure, resulting in difficult assembly between the inner ring and the outer ring. The bearing may be damaged during the assembly process, and its stability is relatively poor. Summary of the Invention

[0005] The purpose of the utility model is to provide a self-lubricating plastic bearing with high stability and compact structure for the above problems existing in the prior art.

[0006] The purpose of the utility model can be achieved by the following technical solutions:

[0007] A self-lubricating plastic bearing includes an outer ring and an inner ring made of plastic material. The outer ring is sleeved on the inner ring. A plurality of self-lubricating columns are circumferentially connected to the outer side of the inner ring. The self-lubricating columns abut against the inner side of the outer ring. It is characterized in that the cross-section of the outer side of the inner ring is arc-shaped, the inner side of the outer ring has a contact part matching the outer side of the inner ring, the self-lubricating columns on the outer side of the inner ring abut against the contact part, the side part of the outer ring has a discontinuous notch, and a locking structure capable of closing the notch is provided at the notch. After the locking structure closes the notch, the inner ring and the outer ring form axial fixation and the inner ring can rotate relative to the outer ring.

[0008] In the above self-lubricating plastic bearing, a plurality of self-lubricating columns are evenly distributed along the width direction of the inner ring. The plurality of self-lubricating columns evenly distributed in the width direction form a self-lubricating unit. The number of the self-lubricating units is several, and several self-lubricating units are circumferentially evenly distributed on the outer side of the inner ring.

[0009] In the above self-lubricating plastic bearing, the locking structure includes a spacer, a connecting rod, a through hole one and a through hole two at the end of the outer ring notch. The through hole one and the through hole two are opposite to each other. One end of the connecting rod is connected to the through hole one, and the other end of the connecting rod is connected to the through hole two. The spacer is sleeved on the connecting rod and the spacer is tightly pressed at the notch of the outer ring.

[0010] In the above self-lubricating plastic bearing, the first through hole penetrates from the side of one side of the outer ring to one end thereof, and the second through hole penetrates from the side of the other side of the outer ring to the other end thereof. The first through hole and the second through hole are opposite to each other.

[0011] In the above self-lubricating plastic bearing, a recessed positioning seat is provided at the end of the notch of the outer ring. The spacer includes a sealing portion matching the end of the outer ring and a connecting portion matching the positioning seat. The connecting portion of the spacer is tightly fitted and connected at the positioning seat, and the sealing portion of the spacer is closely attached to the end of the notch of the outer ring.

[0012] In the above self-lubricating plastic bearing, the number of the spacers is two, and the two spacers are respectively connected to both ends of the notch of the outer ring.

[0013] In the above self-lubricating plastic bearing, a stepped seat one in a stepped shape is provided at the outer port of the first through hole. One end of the connecting rod has a convex head matching the stepped seat one, and the convex head is embedded in the stepped seat one.

[0014] In the above self-lubricating plastic bearing, a stepped seat two in a stepped shape is provided at the outer port of the second through hole. A locking nut matching the stepped seat two is further included. The locking nut is threadedly connected to the other end of the connecting rod and the locking nut is embedded in the stepped seat two.

[0015] In the above self-lubricating plastic bearing, the connecting portion and the sealing portion are of an integral structure.

[0016] In the above self-lubricating plastic bearing, the spacer is made of rubber material.

[0017] Compared with the prior art, since the outer ring of the present self-lubricating plastic bearing has a notch, the notch is closed under the action of the locking structure. After the outer ring is closed, the inner ring is finally stably positioned therein. It can be seen that the inner ring and the outer ring will not cause damage to the present self-lubricating bearing during assembly.

[0018] Since the outer ring made of plastic material has appropriate elasticity itself, the notch is open in the initial state. Under the action of the locking structure, the opened notch can be stably closed, and the stability of the entire self-lubricating plastic bearing is relatively high.

[0019] At the same time, the locking structure is located at the notch and does not occupy extra space of the outer ring. That is to say, the locking structure will not be exposed outside the outer ring. Therefore, its structure is relatively compact and has high practical value. Description of the Drawings

[0020] Figure 1 It is a schematic cross-sectional structure view of the present self-lubricating plastic bearing.

[0021] Figure 2 It is a schematic structure view of the outer ring of the present self-lubricating plastic bearing.

[0022] In the figure, 1 is the outer ring; 1a is the contact part; 1b is the first through hole; 1b1 is the first step seat; 1c is the second through hole; 1c1 is the second step seat; 1d is the positioning seat; 2 is the inner ring; 3 is the self-lubricating column; 4 is the spacer; 4a is the sealing part; 4b is the connecting part; 5 is the connecting rod; 5a is the convex head; 6 is the locking nut. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] It should be noted that when a component is referred to as being "mounted on" another component, it can be directly mounted on the other component or there may also be an intermediate component. When a component is considered to be "arranged on" another component, it can be directly arranged on the other component or there may be an intermediate component at the same time. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there may be an intermediate component at the same time.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0026] As Figure 1 and Figure 2 shown, this self-lubricating plastic bearing includes an outer ring 1 and an inner ring 2 made of plastic material. The outer ring 1 is sleeved on the inner ring 2. A plurality of self-lubricating columns 3 are connected along the circumferential direction of the outer side of the inner ring 2, and the self-lubricating columns 3 abut against the inner side of the outer ring 1.

[0027] The cross-section of the outer side of the inner ring 2 is arc-shaped. The inner side of the outer ring 1 has a contact part 1a matching the outer side of the inner ring 2. The self-lubricating columns 3 on the outer side of the inner ring 2 abut against the contact part 1a. The side part of the outer ring 1 has a discontinuous notch, and there is a locking structure at the notch that can close the notch. When the locking structure closes the notch, the inner ring 2 and the outer ring 1 are axially fixed and the inner ring 2 can rotate relative to the outer ring 1.

[0028] The outer ring 1 of the plastic material has a certain elasticity and toughness, and the notch of the outer ring 1 is open in the initial state. Once the inner ring 2 is inserted into the outer ring 1, under the action of the locking structure, the notch of the outer ring 1 closes, and the inner ring 2 is limited within the outer ring 1. Under the action of the self-lubricating columns 3, the frictional resistance between the inner ring 2 and the outer ring 1 can be effectively reduced.

[0029] Since the outer side of the inner ring 2 is arc-shaped and the inner side of the outer ring 1 matches the outer side of the inner ring 2, once the notch of the outer ring 1 closes, the inner ring 2 and the outer ring 1 can be stably axially fixed. However, the inner ring 2 can rotate smoothly relative to the outer ring 1.

[0030] A plurality of self-lubricating columns 3 are evenly distributed along the width direction of the inner ring 2. The plurality of self-lubricating columns 3 evenly distributed in the width direction form a self-lubricating unit. The number of the self-lubricating units is several, and several self-lubricating units are circumferentially evenly distributed on the outer side of the inner ring 2.

[0031] Such a structure can form multiple self-lubricating contacts between the outer ring 1 and the inner ring 2, effectively improving the self-lubricating performance of the bearing.

[0032] The locking structure includes a spacer 4, a connecting rod 5, a through hole 1b at the end of the notch of the outer ring 1, and a through hole 1c. The above through hole 1b and through hole 1c are opposite to each other. One end of the connecting rod 5 is connected to the through hole 1b, and the other end of the connecting rod 5 is connected to the through hole 1c. The above spacer 4 is sleeved on the connecting rod 5 and the spacer 4 is tightly pressed at the notch of the outer ring 1.

[0033] Both ends of the connecting rod 5 are respectively connected to the through hole 1b and the through hole 1c. Under the action of the connecting rod 5, the notch of the outer ring 1 can be tightened, and finally the flexible spacer 4 is tightly pressed at both ends of the outer ring 1 to avoid rigid contact at the ends of the outer ring 1.

[0034] The through hole 1b penetrates from the side of one side of the outer ring 1 to one end thereof, and the through hole 1c penetrates from the side of the other side of the outer ring 1 to the other end thereof. The above through hole 1b and through hole 1c are opposite to each other.

[0035] Such a structure can enable both ends of the connecting rod 5 to be smoothly connected to the through hole 1b and the through hole 1c.

[0036] The end of the notch of the outer ring 1 has a recessed positioning seat 1d. The above spacer 4 includes a sealing portion 4a matching the end of the outer ring 1 and a connecting portion 4b matching the positioning seat 1d. The connecting portion 4b of the spacer 4 is tightly fitted and connected to the positioning seat 1d, and the sealing portion of the spacer 4 is closely attached to the end of the notch of the outer ring 1.

[0037] Under the action of the positioning seat 1d, the spacer 4 can be stably positioned at the end of the outer ring 1.

[0038] The number of the spacers 4 is two, and the two spacers 4 are respectively connected to both ends of the notch of the outer ring 1.

[0039] At the outer port of the first through hole 1b, there is a first stepped seat 1b1 in a stepped shape. One end of the connecting rod 5 has a convex head matching the first stepped seat 1b1, and the convex head is embedded at the first stepped seat 1b1.

[0040] The cooperation between the convex head and the first stepped seat 1b1 can stably connect one end of the connecting rod 5 to one end of the outer ring 1.

[0041] At the outer port of the second through hole 1c, there is a second stepped seat 1c1 in a stepped shape. It further includes a locking nut 6 matching the second stepped seat 1c1. The locking nut 6 is threadedly connected to the other end of the connecting rod 5 and the locking nut 6 is embedded at the second stepped seat 1c1.

[0042] The cooperation between the locking nut 6 and the second stepped seat 1c1 can stably connect the other end of the connecting rod 5 to the other end of the outer ring 1.

[0043] The connecting part 4b and the sealing part 4a are of an integral structure.

[0044] The spacer 4 is made of rubber material.

[0045] Since the outer ring of this self-lubricating plastic bearing has a notch, under the action of the locking structure, the notch is closed. After the outer ring is closed, the inner ring is finally stably positioned therein. It can be seen that the inner ring and the outer ring will not cause damage to this self-lubricating bearing during assembly.

[0046] Due to the appropriate elasticity of the outer ring made of plastic material itself, the notch is open in the initial state. Under the action of the locking structure, the opened notch can be stably closed, and the stability of the entire self-lubricating plastic bearing is relatively high.

[0047] At the same time, the locking structure is located at the notch and does not occupy extra space of the outer ring. That is to say, the locking structure will not be exposed outside the outer ring. Therefore, its structure is relatively compact and has high practical value.

[0048] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as the scope recorded in this specification.

[0049] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. As long as within the scope of the substantial spirit of the present invention, the appropriate changes and variations made to the above embodiments all fall within the scope claimed by the present invention.

Claims

1. A self-lubricating plastic bearing, comprising an outer ring and an inner ring made of plastic material, wherein the outer ring is sleeved on the inner ring, and a plurality of self-lubricating columns are connected to the outer side of the inner ring along its circumference, and the self-lubricating columns abut against the inner side of the outer ring, characterized in that: The outer cross-section of the inner ring is arc-shaped, the inner side of the outer ring has a contact portion that matches the outer side of the inner ring, the self-lubricating column on the outer side of the inner ring abuts against the contact portion, the side of the outer ring has a disconnected notch, and the notch has a locking structure that can close the notch. When the locking structure closes the notch, the inner ring and the outer ring are axially fixed and the inner ring can rotate relative to the outer ring.

2. The self-lubricating plastic bearing according to claim 1, characterized in that: A plurality of self-lubricating columns are evenly distributed on the inner ring along its width direction. The plurality of self-lubricating columns evenly distributed in the width direction form a self-lubricating unit. The number of the self-lubricating units is several, and the plurality of self-lubricating units are evenly distributed circumferentially on the outer side of the inner ring.

3. The self-lubricating plastic bearing according to claim 2, characterized in that: The locking structure includes a spacer, a connecting rod, and through hole one and through hole two at the end of the outer ring notch. The through hole one is directly opposite to the through hole two. One end of the connecting rod is connected to through hole one, and the other end of the connecting rod is connected to through hole two. The spacer is sleeved on the connecting rod and is pressed tightly against the notch of the outer ring.

4. The self-lubricating plastic bearing according to claim 3, characterized in that: The through hole one penetrates from the side of one side of the outer ring to one end thereof, and the through hole two penetrates from the side of the other side of the outer ring to the other end thereof, and the through hole one and the through hole two are directly opposite to each other.

5. The self-lubricating plastic bearing according to claim 4, characterized in that: The end of the outer ring gap is provided with a recessed positioning seat, and the above-mentioned spacer includes a sealing portion matching the end of the outer ring and a connecting portion matching the positioning seat, the connecting portion of the spacer is tightly fitted and connected to the positioning seat, and the sealing portion of the spacer is tightly attached to the end of the outer ring gap.

6. The self-lubricating plastic bearing according to claim 5, characterized in that: There are two spacers, which are respectively connected to the two ends of the outer ring gap.

7. The self-lubricating plastic bearing according to claim 6, characterized in that: The through hole has a step seat 1 in the shape of a step at its outer end, and one end of the connecting rod has a convex head matching the step seat 1, and the convex head is embedded in a step seat.

8. The self-lubricating plastic bearing according to claim 7, characterized in that: The second through hole has a step seat 2 in the shape of a step at its outer end, and also includes a locking nut matching the step seat 2. The locking nut is threadedly connected to the other end of the connecting rod and the locking nut is embedded in the second step seat.

9. The self-lubricating plastic bearing according to claim 8, characterized in that: The connecting part and the sealing part are an integrated structure.

10. The self-lubricating plastic bearing according to claim 9, characterized in that: The spacer is made of rubber material.

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