Wear-resistant bushing with oil storage blind hole in inner wall
By setting staggered blind holes and inner and outer annular grooves on the inner wall of the bushing, the problems of low load-bearing capacity and uneven oil distribution of the inner wall of the steel bushing are solved, achieving uniform distribution of lubricating oil and increasing oil storage capacity, thus extending the service life of the bushing.
Patent Information
- Application Number
- CN202422567781.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-10-23
AI Technical Summary
The existing steel bushing has low load-bearing capacity and poor oil distribution. Continuous oil grooves damage the inner wall structure, have small oil storage capacity, and uneven oil distribution, which can easily lead to wear and breakage.
N rows and M columns of staggered blind holes are provided on the inner wall of the bushing body. The inner wall has an inner ring groove, and the outer wall has an outer ring groove that communicates with the inner ring groove. The lubricating oil is evenly distributed through the oil injection hole. The blind holes are used for oil storage and distribution.
It improves the load-bearing capacity of the bushing inner wall, increases the oil storage capacity, ensures uniform lubricant distribution, extends service life, and reduces wear from foreign objects.
Smart Images
Figure CN223469584U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of bushings, in particular to a wear-resistant bushing with blind holes for oil storage on the inner wall. BACKGROUND
[0002] The existing lubrication mode of steel bushings generally uses various forms of oil grooves to store and distribute oil, and such structure has the following disadvantages: the continuous oil groove destroys the structure of the inner wall of the bushing, reducing the load-carrying capacity of the inner wall of the bushing; the oil groove bushing has poor oil distribution effect and uneven oil distribution. CONTENT OF THE UTILITY MODEL
[0003] The purpose of the embodiments of the present application is to provide a wear-resistant bushing with blind holes for oil storage on the inner wall to alleviate the technical problems of low load-carrying capacity of the inner wall of the steel bushing and poor oil distribution effect in the prior art.
[0004] In order to solve the above technical problems, the technical scheme provided by the present application is:
[0005] The wear-resistant bushing with blind holes for oil storage on the inner wall provided by the present application comprises a bushing body;
[0006] The inner wall of the bushing body is provided with N rows of M columns of blind holes, the N rows of blind holes are arranged at intervals along the axial direction of the bushing body, and the M columns of blind holes are arranged at intervals along the circumferential direction of the bushing body;
[0007] The blind holes in adjacent two rows are arranged in a staggered manner;
[0008] The inner wall of the bushing body is provided with an inner annular groove.
[0009] Further, the outer wall of the bushing body is provided with an outer annular groove at a position corresponding to the inner annular groove, and the outer annular groove is in communication with the inner annular groove through an oil injection hole.
[0010] Further, in the adjacent two rows of blind holes, the centers of the blind holes in one row are located on the extension line of the center line of the line between the centers of the adjacent two blind holes in the other row.
[0011] Further, in the adjacent two columns of blind holes, the length of the opening end of one column of blind holes along the axial direction of the bushing body is L1, and the distance between the centers of the adjacent two blind holes in the other column is L2, and L2≤2×L1.
[0012] Further, the blind holes are arranged as tapered holes, and the diameter of the opening end of the tapered hole is L1.
[0013] Further, the blind holes are arranged as elliptical holes, the major axis of the elliptical hole extends along the circumferential direction of the bushing body, and the length of the opening end of the elliptical hole along the axial direction of the bushing body is arranged as L1.
[0014] Further, the inner wall of the bushing body is provided with a first wear-reducing layer, and the first wear-reducing layer is provided by pure manganese phosphating.
[0015] Further, the inner wall of the first wear-reducing layer is provided with a second wear-reducing layer, and the second wear-reducing layer comprises molybdenum disulfide.
[0016] Further, the inner ring groove and the outer ring groove are both located in the middle part of the bushing body.
[0017] Further, the end face of one end of the bushing body and the outer wall of the bushing body are connected by a plane.
[0018] Based on the above technical solutions, the technical effects achieved by the utility model are analyzed as follows:
[0019] The wear-resistant bushing with the inner wall provided with oil storage blind holes provided by the utility model comprises a bushing body; the inner wall of the bushing body is provided with N rows of M columns of blind holes, the N rows of blind holes are arranged at intervals along the axial direction of the bushing body, and the M columns of blind holes are arranged at intervals along the circumferential direction of the bushing body; the two adjacent rows of blind holes are arranged in a staggered manner; and the inner wall of the bushing body is provided with an inner ring groove.
[0020] The inner wall of the bushing body is provided with blind holes, and the blind holes are used for oil storage and oil distribution. The two adjacent rows of blind holes are arranged in a staggered manner, so that the lubrication of the bushing body and the pin shaft relative rotation can be ensured without blind areas, and the contact surface of the pin shaft and the bushing body can be covered with oil only by rotating a small angle. The bushing body has a large oil storage capacity, which is 3-5 times that of an ordinary eight-shaped oil groove bushing or a spiral oil groove bushing, and the unit volume of the blind holes is large. The powder generated by the wear of the pin shaft and the bushing body and the dust and sand from the outside can be extruded into the blind holes, so that the foreign matter wear of the contact surface of the pin shaft and the bushing body can be reduced.
[0021] The inner wall of the bushing body is provided with an inner ring groove, and the inner ring groove is used for oil injection and oil storage.
[0022] The lubrication principle of the wear-resistant bushing with the inner wall provided with oil storage blind holes is as follows: when the pin shaft oil injection mode is adopted, the oil outlet of the pin shaft is aligned with the inner ring groove of the bushing body, the lubricating oil enters the inner ring groove of the bushing body through the oil injection nozzle arranged on the end face of the pin shaft, the lubricating oil in the pressurized state is extruded into the blind holes in the gap between the pin shaft and the bushing body, and when the pin shaft and the bushing body rotate relative to each other, a lubricating oil film is formed between the bushing body and the pin shaft.
[0023] The plurality of blind holes of the wear-resistant bushing with the oil storage blind holes in the inner wall are individual bodies and regularly and uniformly distributed among each other, which does not damage the bearing capacity of the inner wall of the bushing body, and can solve the problem of the reduction of the bearing capacity of the inner wall of the bushing due to the lubricating grooves. In addition, the blind holes have a large oil storage capacity, and the oil distribution only needs a small angle of relative rotation between the pin shaft and the bushing body to distribute the lubricating oil on the contact surface, which is more uniform, and can greatly prolong the service life of the pin shaft and the bushing body. BRIEF DESCRIPTION OF DRAWINGS
[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0025] Figure 1 The structure schematic diagram of the first embodiment of the wear-resistant bushing with the oil storage blind holes in the inner wall provided by the embodiments of the present application is shown in the figure.
[0026] Figure 2 The cross-sectional view of the first embodiment of the wear-resistant bushing with the oil storage blind holes in the inner wall provided by the embodiments of the present application is shown in the figure.
[0027] Figure 3 The Figure 2 The local enlarged view of A in the figure.
[0028] Figure 4 The Figure 2 The local enlarged view of B in the figure.
[0029] Figure 5 The structure schematic diagram of the second embodiment of the wear-resistant bushing with the oil storage blind holes in the inner wall provided by the embodiments of the present application is shown in the figure.
[0030] Figure 6 The cross-sectional view of the second embodiment of the wear-resistant bushing with the oil storage blind holes in the inner wall provided by the embodiments of the present application is shown in the figure.
[0031] Figure 7 The Figure 6 The local enlarged view of C in the figure.
[0032] Figure legend:
[0033] 100-bushing body; 110-blind hole; 120-inner ring groove; 130-outer ring groove; 140-oil injection hole; 150-flat surface. DETAILED DESCRIPTION
[0034] To make the purposes, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.
[0035] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "inner", "outer", etc. are based on the positions or location relationships shown in the drawings or the positions or location relationships in which the products of the present application are usually placed, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used for differentiation in description and cannot be understood as indicating or implying relative importance.
[0036] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.
[0037] The existing steel bush lubrication mode generally adopts various forms of oil groove to store and distribute oil. The continuous oil groove reduces the bearing capacity of the inner wall of the bush, and after the bush wears, the gap between the pin shaft and the bush increases, so that the pin shaft and the bush produce a larger radial impact in the movement, which makes the bush and the pin shaft have the risk of breaking. The oil groove has a small oil storage capacity and a poor oil distribution effect. The pin shaft and the bush need to rotate relative to each other by at least 45 degrees to distribute oil on the entire contact surface, which is more likely to cause wear of the pin shaft and the bush.
[0038] Therefore, referring to Figures 1 to 7 The wear-resistant bush with an inner wall having oil storage blind holes provided by the embodiments of the present application comprises a bush body 100. The inner wall of the bush body 100 is provided with N rows of M columns of blind holes 110. The N rows of blind holes 110 are uniformly and spacedly arranged along the axial direction of the bush body 100, and the M columns of blind holes 110 are uniformly and spacedly arranged along the circumferential direction of the bush body 100. Adjacent two rows of blind holes 110 are arranged in a staggered manner. The inner wall of the bush body 100 is provided with an inner ring groove 120.
[0039] Specifically, the cross section of the bush body 100 is annular. The N rows and M columns of blind holes 110 refer to that the inner wall of the bush body 100 is provided with a plurality of blind holes 110, and the plurality of blind holes 110 are arranged in N rows and M columns, wherein N and M can be set to any natural number greater than 2. The staggered arrangement of the adjacent two rows of blind holes 110 refers to that in the adjacent two rows of blind holes 110, the center line of at least one blind hole 110 in one row and the center line of all blind holes 110 in the other row form an angle with the axis of the bush body 100; in this embodiment, the center line of any blind hole 110 in one row and the center line of all blind holes 110 in the other row form an angle with the axis of the bush body 100. Further, when the oil injection mode of external injection is adopted, the outer wall of the bush body 100 is provided with an outer ring groove 130 at the position corresponding to the inner ring groove 120, and the outer ring groove 130 and the inner ring groove 120 are communicated through the oil injection hole 140; the oil injection hole 140 is arranged on the bottom wall of the outer ring groove 130 and penetrates into the inner ring groove 120.
[0040] The inner wall of the bush body 100 is provided with blind holes 110 for oil storage and oil distribution. The adjacent two rows of blind holes 110 are arranged in a staggered manner, so that the relative rotation of the bush body 100 and the pin shaft can ensure that there is no blind area for lubrication, and only a small angle of rotation is needed to distribute oil on the contact surface of the pin shaft and the bush body 100. The bush body 100 has a large oil storage capacity, which is 3-5 times that of ordinary eight-shaped oil groove bushings or spiral oil groove bushings, and the unit volume of the blind holes 110 is large. The powder generated by the wear of the pin shaft and the bush body 100 and the dust and sand entering from the outside can be extruded into the blind holes 110, which can reduce the foreign matter wear of the contact surface of the pin shaft and the bush body 100.
[0041] The inner wall of the bush body 100 is provided with an inner ring groove 120, and the outer wall is provided with an outer ring groove 130, and the outer ring groove 130 and the inner ring groove 120 are communicated through the oil injection hole 140; the outer ring groove 130, the inner ring groove 120 and the oil injection hole 140 are used for oil injection and oil storage.
[0042] The lubrication principle of the inner wall of the wear-resistant bushing with oil storage blind holes is as follows: after the bush body 100 is pressed into the steel body, the outer ring groove 130 is aligned with the oil injection position of the steel body, the lubricating oil enters the outer ring groove 130 of the bush body 100 through the oil injection nozzle arranged on the steel body, and then enters the inner ring groove 120 through the oil injection hole 140 on the bush body 100; when the pin shaft oil injection mode is adopted, the oil outlet of the pin shaft is aligned with the inner ring groove 120 of the bush body 100, the lubricating oil enters the inner ring groove 120 of the bush body 100 through the oil injection nozzle arranged on the end surface of the pin shaft, and the pressurized lubricating oil is extruded into the blind holes 110 in the gap between the pin shaft and the bush body 100; when the pin shaft and the bush body 100 rotate relatively, a lubricating oil film is formed between the bush body 100 and the pin shaft.
[0043] The plurality of blind holes 110 of the wear-resistant bushing with the oil storage blind holes in the inner wall are individual, regularly and uniformly distributed among each other, do not damage the bearing capacity of the inner wall of the bushing body 100, and can solve the problem of the reduction of the bearing capacity of the inner wall of the bushing due to the lubricating grooves.
[0044] The structure and shape of the wear-resistant bushing with the oil storage blind holes in the inner wall are described in detail as follows:
[0045] In the optional scheme of the embodiment of the utility model, the center of the blind holes 110 in one of the two adjacent rows is located on the extension line of the center line of the connecting line between the two adjacent blind holes 110 in the other row.
[0046] Specifically, the N rows of blind holes 110 are uniformly and spacedly arranged along the axial direction of the bushing body 100, and the M columns of blind holes 110 are uniformly and spacedly arranged along the circumferential direction of the bushing body 100, so that the distance between each column of blind holes 110 and the two adjacent columns of blind holes 110 is equal.
[0047] In the optional scheme of the embodiment of the utility model, the center of the blind holes 110 in one of the two adjacent rows is located on the extension line of the center line of the connecting line between the two adjacent blind holes 110 in the other row.
[0048] In the optional scheme of the embodiment of the utility model, the length of the opening end of one of the two adjacent columns of blind holes 110 along the axial direction of the bushing body 100 is L1, and the center distance between the two adjacent blind holes 110 in the other column is L2, and L2≤2×L1.
[0049] Specifically, referring to Figure 1 , the blind holes 110 are arranged as tapered holes; or referring to Figure 5 , the blind holes 110 are arranged as elliptical holes, and the opening end of the blind hole 110 refers to the end of the blind hole 110 flush with the inner wall of the bushing body 100.
[0050] The center distance between the two blind holes 110 in the same column is less than or equal to 2 times the length of the opening end of the blind hole 110, further ensuring that there is no blind area for lubrication when the bushing body 100 and the pin shaft are relatively rotated, and the center distance of the blind holes 110 in the circumferential direction of the bushing body 100 is fixed, so that the contact surface of the pin shaft and the bushing body 100 can be fully covered with lubricating oil by rotating a very small angle.
[0051] In the optional scheme of the embodiment of the utility model, referring to Figure 2The blind hole 110 is set as a tapered hole, and a diameter of an opening end of the tapered hole is L1.
[0052] Specifically, referring to Figure 2 and Figure 3 The tapered hole refers to that a cross section of the blind hole 110 is set as a circle, and a diameter of the blind hole 110 gradually decreases from an inner wall of the sleeve body 100 outward.
[0053] The blind hole 110 is set as a tapered hole, which is convenient for processing and avoids dead angle storage of foreign matters in the blind hole 110.
[0054] In an optional scheme of the embodiment of the utility model, referring to Figure 5 The blind hole 110 is set as an elliptical hole, a long diameter of the elliptical hole extends along a circumferential direction of the sleeve body 100, and a length of the opening end of the elliptical hole along an axial direction of the sleeve body 100 is set as L1.
[0055] Specifically, the long diameter of the opening end of the elliptical hole is the maximum long diameter of the elliptical hole.
[0056] The blind hole 110 is set as an elliptical hole, which is convenient for processing and avoids dead angle storage of foreign matters in the blind hole 110.
[0057] In an optional scheme of the embodiment of the utility model, the inner wall of the sleeve body 100 is provided with a first wear-reducing layer, and the first wear-reducing layer is set through pure manganese phosphating.
[0058] Specifically, the first wear-reducing layer is processed through pure manganese phosphating, which can have a good initial wear-reducing effect, avoids mutual engagement of the sleeve body 100 and the pin shaft before being well run-in, and makes oil distribution more uniform than the sleeve without the first wear-reducing layer.
[0059] In an optional scheme of the embodiment of the utility model, the inner wall of the first wear-reducing layer is provided with a second wear-reducing layer, and the second wear-reducing layer includes molybdenum disulfide.
[0060] Specifically, the inner wall surface of the sleeve body 100 is designed as a double-layer wear-reducing layer, the first layer is processed through pure manganese phosphating, and the second layer is sprayed with molybdenum disulfide; the double-layer wear-reducing layer can have a good initial wear-reducing effect, avoids mutual engagement of the sleeve body 100 and the pin shaft before being well run-in, and makes oil distribution more uniform than the sleeve without the first wear-reducing layer.
[0061] In an optional scheme of the embodiment of the utility model, the inner ring groove 120 and the outer ring groove 130 are both located at the middle part of the sleeve body 100.
[0062] Specifically, the middle part of the bush body 100 refers to the distance between the axis of the inner ring groove 120 and the two end faces of the bush body 100 is equal to the distance between the axis of the outer ring groove 130 and the two end faces of the bush body 100 along the axial direction of the bush body 100. Of course, the scheme that the inner ring groove 120 and the outer ring groove 130 are offset so that the oil injection hole 140 is matched with the oil outlet of the pin shaft or the steel body should also be within the protection scope of the embodiments of the utility model.
[0063] The inner ring groove 120 and the outer ring groove 130 are both located in the middle part of the bush body 100, so that the lubricating oil in the inner ring groove 120 is uniformly distributed to the two ends of the bush body 100, and the uniformity of oil distribution is improved.
[0064] In the optional scheme of the embodiments of the utility model, the inner wall of the two ends of the bush body 100 is provided with a chamfer, which plays a guiding role.
[0065] In the optional scheme of the embodiments of the utility model, the end face of one end of the bush body 100 and the outer wall of the bush body 100 are transitioned through a plane 150.
[0066] Specifically, referring to Figure 2 and Figure 4 , the end face of one end of the bush body 100 and the outer wall of the bush body 100 are transitioned through a plane 150, and the end is the press-in end of the bush body 100; the included angle between the plane 150 and the outer wall of the bush body 100 is set to 15°, and a chamfer of 3mm-5mm×15° is formed.
[0067] The press-in end of the bush body 100 is transitioned through the plane 150, which is convenient for guiding when the bush body 100 is pressed into the cavity.
[0068] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.
[0069] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims
1. A wear sleeve having an inner wall with blind oil storage holes, characterized in that, The application relates to a bush body (100) comprising: an inner wall of the bush body (100) is provided with N rows of M columns of blind holes (110), the N rows of blind holes (110) are arranged at intervals along the axial direction of the bush body (100), and the M columns of blind holes (110) are arranged at intervals along the circumferential direction of the bush body (100); two adjacent rows of the blind holes (110) are arranged in a staggered mode; the inner wall of the bush body (100) is provided with an inner annular groove (120); in two adjacent columns of the blind holes (110), the length of the opening end of one column of the blind holes (110) along the axial direction of the bush body (100) is L1, and the center distance of two adjacent blind holes (110) in the other column is L2, and L2<=2*L1; the blind hole (110) is provided with an elliptical hole, the long diameter of the elliptical hole extends along the circumferential direction of the bush body (100), and the length of the opening end of the elliptical hole along the axial direction of the bush body (100) is L1. the outer wall of the bush body (100) is provided with an outer annular groove (130) at a position corresponding to the inner annular groove (120), and the outer annular groove (130) and the inner annular groove (120) are communicated through an oil injection hole (140).
2. The wear-resistant bushing with an inner wall having an oil storage blind hole according to claim 1, characterized in that, in two adjacent rows of the blind holes (110), the center of the blind hole (110) in one row is located on the extension line of the center line of two adjacent blind holes (110) in the other row.
3. The wear sleeve having oil retaining blind holes in the inner wall according to claim 1, characterized in that, the blind hole (110) is provided as a conical hole, and the diameter of the opening end of the conical hole is L1.
4. The wear sleeve having an inner wall with blind oil storage holes of claim 3, wherein, the inner wall of the bush body (100) is provided with a first wear-reducing layer, and the first wear-reducing layer is provided by pure manganese phosphating.
5. The wear sleeve having oil retaining blind holes in the inner wall according to any one of claims 1-4, characterized in that, the inner annular groove (120) and the outer annular groove (130) are located in the middle part of the bush body (100).
6. The wear sleeve having oil retaining blind holes in the inner wall according to claim 2, characterized in that, the end face of one end of the bush body (100) and the outer wall of the bush body (100) are connected through a plane (150).
7. The wear sleeve having oil retaining blind holes in the inner wall according to claim 1, characterized in that,