Connecting rod bearing bush positioning structure
By providing wedged fit first and first depressions, second and second depressions between the connecting rod bearing shell and the bearing seat, the problems of limited application, complex structure and fatigue fracture in the prior art are solved, and a simpler and compact positioning structure and a longer service life are achieved.
Patent Information
- Application Number
- CN202421955054.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-08-13
AI Technical Summary
The existing connecting rod bearing bush positioning structure has problems such as limited application, complex structure, and the bearing bushing is prone to fatigue and fracture at the pin holes.
The wedge fit between the first and first depressions between the bearing shell and the bearing seat, as well as the second and second depressions, is adopted to replace the traditional edge barrier and pin hole structure to realize the positioning and restraint of the bearing shell.
The structure of bearing shells is simplified, the processing difficulty is reduced, the application range is expanded, and the stress concentration at the pin holes is avoided, and the service life of bearing shells is extended.
Smart Images
Figure CN222836064U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sliding bearings, in particular to a connecting rod bearing bush positioning structure. Background Art
[0002] The connecting rod bearing is a kind of sliding bearing made of tin or lead as a soft base material and a small amount of hard alloy. It is impact resistant, vibration absorbing, has good running-in properties and a low friction coefficient. It is widely used in industrial production, especially in heavy industry production.
[0003] Please see attached Figure 1 and attached Figure 2 In the prior art, the two sides of the bearing bush 1 are made into the form of ribs 101, so that it can be embedded in the bearing seat 2 for axial constraint; the outer ring of the bearing bush 1 and the inner ring of the bearing seat 2 are transitionally matched to radially constrain the bearing bush 1. At the same time, the bearing bush 1 and the bearing seat 2 are equipped with a pin hole 3 with a hole diameter of d, and the bearing bush 1 is constrained by a pin through the pin hole 3 to prevent the relative rotation between the bearing bush 1 and the bearing seat 2, thereby realizing the full constraint positioning of the bearing bush.
[0004] The connecting rod bearing positioning structure of the prior art has the following disadvantages:
[0005] 1. Since two side flanges 101 are added on both sides of the bearing shell 1, the axial dimension of the bearing shell 1 is relatively increased, which limits the application in some places with space requirements.
[0006] 2. The structure of the bearing 1 is relatively complex, which increases the difficulty of processing.
[0007] 3. The pin hole 3 drilled to prevent relative rotation of the bearing 1 will produce a large stress concentration, which is prone to fatigue fracture under the action of alternating loads, and the service life will be greatly reduced.
[0008] Therefore, it is necessary to provide a connecting rod bearing positioning structure that can solve the problems in the prior art of limited application of bearings, complex structure, and easy fatigue fracture of bearings at the pin holes. Summary of the invention
[0009] The utility model aims to provide a connecting rod bearing bush positioning structure, which can solve the problems of limited application of bearing bushes, complex structure and easy fatigue fracture of bearing bushes at pin holes in the prior art.
[0010] The utility model is achieved in this way:
[0011] A connecting rod bearing positioning structure includes a bearing and a bearing seat, wherein the outer ring of the bearing is transitionally matched with the inner ring of the bearing seat; a first protrusion is formed on one side of the bearing, and a first recess is formed on one side of the bearing seat, and the first protrusion is matched and wedged into the first recess; a second protrusion is formed on the other side of the bearing, and a second recess is formed on the other side of the bearing seat, and the second protrusion is matched and wedged into the second recess.
[0012] The first protrusion and the second protrusion are staggered front and back along the axial direction of the bearing shell.
[0013] The first protrusion is located at the bottom of the bearing shell, and one end of the first protrusion extends to the lowest point of the bearing shell and protrudes downward to form a first force-bearing surface; the second protrusion is located at the top of the bearing shell, and one end of the second protrusion extends to the highest point of the bearing shell and protrudes upward to form a second force-bearing surface, and the first force-bearing surface and the second force-bearing surface are set in opposite directions.
[0014] Under the action of the torque M of the connecting rod bearing, the direction of the first force F1 acting on the first recessed portion by the first convex force-bearing surface is opposite to the direction of the second force F2 acting on the second recessed portion by the second convex force-bearing surface, and the moment of force between the first force F1 and the second force F2 is balanced with the torque M.
[0015] The first protrusion and the second protrusion are both in an arc surface structure, and the other end of the first protrusion and the other end of the second protrusion are smoothly connected to the bearing shell; the first protrusion and the second protrusion are an integrated structure with the bearing shell.
[0016] The widths of the first protrusion and the first recess are consistent and smaller than the axial width of the bearing shell, and the widths of the second protrusion and the second recess are consistent and smaller than the axial width of the bearing shell.
[0017] Compared with the prior art, the utility model has the following beneficial effects:
[0018] 1. The utility model has a first protrusion and a second protrusion on the bearing shell, and a first recessed portion and a second recessed portion on the bearing seat. The first protrusion is matched and wedged in the first recessed portion, and the second protrusion is matched and wedged in the second recessed portion. Compared with the existing technology, the retaining edge structure is simpler and more compact, which makes the positioning structure between the bearing shell and the bearing seat more reasonable, facilitates the processing and manufacturing of the bearing shell, and can also improve the application range of the connecting rod bearing shell.
[0019] 2. Since the utility model is provided with matching first protrusions and first recesses as well as second protrusions and second recesses, there is no need to set pin holes and pins. While ensuring the strength of the bearing shell, it avoids the problem of stress concentration at the pin holes causing fatigue fracture of the bearing shells at the pin holes, which is beneficial to extending the service life of the bearing shell. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a radial cross-sectional view of a bearing bush in a connecting rod bearing bush positioning structure of the prior art;
[0021] Figure 2 It is an axial cross-sectional view of a connecting rod bearing bush positioning structure in the prior art;
[0022] Figure 3 It is a radial cross-sectional view of one side of the connecting rod bearing bush positioning structure of the utility model;
[0023] Figure 4 It is a radial cross-sectional view of the other side of the connecting rod bearing bush positioning structure of the utility model;
[0024] Figure 5 The utility model is a schematic diagram of the axial structure of the bearing bush in the connecting rod bearing bush positioning structure.
[0025] In the figure, 1 is a bearing shell, 101 is a rib, 102 is a first protrusion, 103 is a second protrusion, 104 is a first force-bearing surface, 105 is a second force-bearing surface, 2 is a bearing seat, 201 is a first recessed portion, 202 is a second recessed portion, and 3 is a pin hole. DETAILED DESCRIPTION
[0026] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.
[0027] Please see attached Figure 3 To Attachment Figure 5 A connecting rod bearing positioning structure includes a bearing 1 and a bearing seat 2, wherein the outer ring of the bearing 1 is transitionally matched with the inner ring of the bearing seat 2; a first protrusion 102 is formed on one side of the bearing 1, and a first recessed portion 201 is formed on one side of the bearing seat 2, and the first protrusion 102 is matched and wedged into the first recessed portion 201; a second protrusion 103 is formed on the other side of the bearing 1, and a second recessed portion 202 is formed on the other side of the bearing seat 2, and the second protrusion 103 is matched and wedged into the second recessed portion 202.
[0028] The bearing shell 1 is a split structure of the prior art, and a first raised portion 102 with a vertical projection area of A1 and a second raised portion 103 with a vertical projection area of A2 are raised at the split section. The bearing seat 2 is a bearing seat structure of the prior art, and a first recessed portion 201 and a second recessed portion 202 are formed at the corresponding positions of the first raised portion 102 and the second raised portion 103.
[0029] Through the wedging fit between the first protrusion 102 and the first recessed portion 201, and the wedging fit between the second protrusion 103 and the second recessed portion 202, radial movement, axial movement and relative rotation between the bearing shell 1 and the bearing seat 2 can be limited by two-point positioning.
[0030] Compared with the traditional rib structure, the first protrusion 102 and the second protrusion 103 are smaller in size, can better adapt to the installation environment, and reduce the occurrence of application restrictions. In addition, the bearing 1 has a simpler structure and is less difficult to process.
[0031] Please see attached Figure 3 and attached Figure 4 The first protrusion 102 and the second protrusion 103 are staggered front and back along the axial direction of the bearing shell 1.
[0032] Since the first protrusion 102 and the second protrusion 103 are staggered in the axial direction of the bearing shell 1, the axial movement of the bearing shell 1 relative to the bearing seat 2 can be limited, thereby playing an effective positioning role.
[0033] Please see attached Figure 3 To Attachment Figure 5 The first protrusion 102 is located at the bottom of the bearing shell 1, and one end of the first protrusion 102 extends to the lowest point of the bearing shell 1 and protrudes downward to form a first force-bearing surface 104; the second protrusion 103 is located at the top of the bearing shell 1, and one end of the second protrusion 103 extends to the highest point of the bearing shell 1 and protrudes upward to form a second force-bearing surface 105, and the first force-bearing surface 104 and the second force-bearing surface 105 are set in opposite directions.
[0034] Since the first force-bearing surface 104 and the second force-bearing surface 105 are arranged in opposite directions, that is, the first protrusion 102 and the second protrusion 103 are raised in opposite directions, the force on the bearing shell 1 is balanced, thereby limiting the rotation of the bearing shell 1 relative to the bearing seat 2.
[0035] Please see attached Figure 5 Under the action of the torque M of the connecting rod bearing, the direction of the first force F1 exerted by the first convex force-bearing surface 104 on the first recessed portion 201 is opposite to the direction of the second force F2 exerted by the second convex force-bearing surface 105 on the second recessed portion 202, and the moment of force between the first force F1 and the second force F2 is balanced with the torque M.
[0036] The moment of force of the first force F1 and the second force F2 is balanced with the torque M, which further ensures the assembly stability of the bearing shell 1 relative to the bearing seat 2 in the moving state.
[0037] Please see attached Figure 5 The first protrusion 102 and the second protrusion 103 are both in an arc surface structure, and the other end of the first protrusion 102 and the other end of the second protrusion 103 are smoothly connected to the bearing 1; the first protrusion 102 and the second protrusion 103 are an integrated structure with the bearing 1.
[0038] The first protrusion 102 and the second protrusion 103 can be manufactured by integrally forming the bearing shell 1 with a mold, which further reduces the difficulty of processing.
[0039] Please see attached Figure 3 and attached Figure 4 The widths of the first protrusion 102 and the first recessed portion 201 are consistent and smaller than the axial width of the bearing shell 1, both are b1, and the widths of the second protrusion 103 and the second recessed portion 202 are consistent and smaller than the axial width of the bearing shell 1, both are b2.
[0040] The first protrusion 102 and the first recess 201 have the same width. The second protrusion 103 and the second recess 202 can limit the axial movement of the bearing shell 1 relative to the bearing seat 2.
[0041] Please see attached Figure 3 To Attachment Figure 5 , the working principle of the utility model is:
[0042] During assembly, the first protrusion 102 and the second protrusion 103 are formed by protruding at the bottom and the top of the bearing shell 1, and the first protrusion 102 and the second protrusion 103 are matched and wedged into the corresponding first recessed part 201 and the second recessed part 202 of the bearing seat 2, so that the outer ring of the bearing shell 1 and the inner ring of the bearing seat 2 are transitionally matched, thereby realizing radial constraint on the bearing shell through the cooperation of the first protrusion 102 and the first recessed part 201 and the second protrusion 103 and the second recessed part 202. Since the size and width of the first protrusion 102 and the first recessed part 201 are consistent, the bearing shell 1 can be axially constrained.
[0043] The vertical projection area of the first protrusion 102 in the first recessed portion 201 is A1, and the vertical projection area of the second protrusion 103 in the second recessed portion 202 is A2. Under the action of the torque M of the connecting rod bearing, the torque formed by the first force F1 acting on the A1 surface and the second force F2 acting on the A2 surface is balanced with the torque M, thereby constraining the bearing 1 to rotate relative to the bearing seat 2.
[0044] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A connecting rod bearing positioning structure, characterized by: The invention comprises a bearing shell (1) and a bearing seat (2), wherein the outer ring of the bearing shell (1) and the inner ring of the bearing seat (2) are transitionally matched; a first protrusion (102) is formed on one side of the bearing shell (1), and a first recessed portion (201) is formed on one side of the bearing seat (2), and the first protrusion (102) is matched and wedged into the first recessed portion (201); a second protrusion (103) is formed on the other side of the bearing shell (1), and a second recessed portion (202) is formed on the other side of the bearing seat (2), and the second protrusion (103) is matched and wedged into the second recessed portion (202).
2. The connecting rod bearing positioning structure according to claim 1 is characterized in that: The first protrusion (102) and the second protrusion (103) are arranged staggered front and back along the axial direction of the bearing shell (1).
3. The connecting rod bearing positioning structure according to claim 1 or 2, characterized in that: The first protrusion (102) is located at the bottom of the bearing shell (1), and one end of the first protrusion (102) extends to the lowest point of the bearing shell (1) and protrudes downward to form a first force-bearing surface (104); the second protrusion (103) is located at the top of the bearing shell (1), and one end of the second protrusion (103) extends to the highest point of the bearing shell (1) and protrudes upward to form a second force-bearing surface (105), and the first force-bearing surface (104) and the second force-bearing surface (105) are arranged in opposite directions.
4. The connecting rod bearing positioning structure according to claim 3 is characterized in that: Under the action of the torque M of the connecting rod bearing, the direction of the first force F1 exerted by the first force-bearing surface (104) on the first recessed portion (201) is opposite to the direction of the second force F2 exerted by the second force-bearing surface (105) on the second recessed portion (202), and the moment of force between the first force F1 and the second force F2 is balanced with the torque M.
5. The connecting rod bearing positioning structure according to claim 3 is characterized in that: The first protrusion (102) and the second protrusion (103) are both in an arc surface structure; the other end of the first protrusion (102) and the other end of the second protrusion (103) are smoothly connected to the bearing shell (1); the first protrusion (102) and the second protrusion (103) are in an integrated structure with the bearing shell (1).
6. The connecting rod bearing positioning structure according to claim 3 is characterized in that: The widths of the first protrusion (102) and the first recess (201) are consistent and smaller than the axial width of the bearing shell (1), and the widths of the second protrusion (103) and the second recess (202) are consistent and smaller than the axial width of the bearing shell (1).