CN216975511U - Main bearing structure and engine - Google Patents
Main bearing structure and engine Download PDFInfo
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- CN216975511U CN216975511U CN202123375201.4U CN202123375201U CN216975511U CN 216975511 U CN216975511 U CN 216975511U CN 202123375201 U CN202123375201 U CN 202123375201U CN 216975511 U CN216975511 U CN 216975511U
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Abstract
The utility model discloses a main bearing structure and an engine, wherein the main bearing structure comprises a bearing cap, a bearing bush and two elastic buffer assemblies, the bearing cap is provided with an arc-shaped hole, the bearing bush is arc-shaped and is positioned in the arc-shaped hole, the middle part of the bearing bush along the axial direction is in interference fit with the bearing cap, and the two elastic buffer assemblies are arranged between the bearing cap and the bearing bush and are respectively positioned at two ends of the bearing bush along the axial direction. This main bearing structure through set up the springiness cushioning subassembly in the clearance that axle bush and bearing cap formed, the springiness cushioning subassembly buffering is applyed the effort in the axle bush through the bent axle to effectively reduce the axle bush along the axial both ends and the contact stress between the bent axle, thereby effectively alleviate the phenomenon that the surface of axle bush takes place fatigue wear, improved the life of axle bush, reduced main bearing structure's maintenance and change frequency, save the cost.
Description
Technical Field
The utility model relates to the technical field of engines, in particular to a main bearing structure and an engine.
Background
For an engine, a crankshaft and a bearing bush are matched to form a precise friction pair of the diesel engine, and the service life and the working state of the precise friction pair are one of key factors of the working reliability of the diesel engine. Along with the improvement of the power density of the diesel engine, the front end and the rear end of the crankshaft along the axial direction are gradually increased under the action of the weight of the flywheel and the damper, so that the load borne by the edge area of the bearing bush along the axial direction is gradually increased, the edge area of the bearing bush along the axial direction is extruded by the bearing cover and the crankshaft, the gap between the bearing bush and the crankshaft is reduced, a lubricating oil film is difficult to generate, the bearing bush is further subjected to fatigue wear, after the coating of the edge area of the bearing bush along the axial direction is worn, the load extends inwards along the axial direction, all coatings of the bearing bush are further worn, the bearing bush is caused to lose efficacy, and the reliability of the engine is seriously influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a main bearing structure and an engine, and aims to solve the problem that the contact stress applied to a bearing bush by a crankshaft can cause fatigue wear on the surface of the bearing bush in the prior art.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a main bearing arrangement, comprising:
the bearing cover is provided with an arc-shaped hole;
the bearing bush is arc-shaped and is positioned in the arc-shaped hole, and the middle part of the bearing bush along the axial direction is in interference fit with the bearing cover;
and the two elastic buffer assemblies are arranged between the bearing cover and the bearing bush and are respectively positioned at the two ends of the bearing bush along the axial direction.
Preferably, the elastic buffering component comprises an elastic sheet, the elastic sheet comprises an arc-shaped elastic sheet body and a plug column connected to the elastic sheet body, the bearing cover is provided with a first slot communicated with the arc-shaped hole, and the plug column is slidably plugged with the first slot.
Preferably, the elastic buffer assembly further comprises a buffer valve, the buffer valve comprises a first valve casing, a second valve casing and an elastic member, the bearing cover further comprises a groove communicated with the arc-shaped hole, one of the first valve casing and the second valve casing is fixedly connected to the elastic sheet body, the other one of the first valve casing and the second valve casing is fixedly connected to the inner wall of the groove, the first valve casing and the second valve casing are slidably connected and form a containing cavity, the elastic member is located in the containing cavity, and two ends of the elastic member abut against the first valve casing and the second valve casing respectively.
Preferably, one of the first valve housing and the second valve housing is provided with a second slot, and the other is slidably inserted into the second slot.
Preferably, the elastic member is a spring.
Preferably, the elastic buffer assembly comprises a plurality of buffer valves, and the plurality of buffer valves are distributed at intervals along the circumferential direction of the elastic sheet body.
Preferably, the number of the inserting columns and the number of the first slots are two, the inserting columns and the first slots are arranged in a one-to-one correspondence mode and are inserted in a sliding mode, and the inserting columns are located at two end portions of the elastic sheet body in the circumferential direction respectively.
Preferably, the inner wall of the arc-shaped hole is provided with an arc-shaped convex block, and the bearing bush is in interference fit with the arc-shaped convex block.
Preferably, the bearing cap is provided with a weight-reduction groove.
An engine comprises the main bearing structure.
The utility model has the beneficial effects that:
the utility model provides a main bearing structure which comprises a bearing cover, a bearing bush and two elastic buffer assemblies. Wherein, the bearing cap is provided with an arc hole, the bearing bush is arc-shaped and positioned in the arc hole, the middle part of the bearing bush along the axial direction is in interference fit with the bearing cap, thus the bearing bush is assembled on the bearing cap, a gap is formed between both ends of the bearing bush along the axial direction and the bearing cap, and an elastic buffer component is arranged in the gap formed by the bearing bush and the bearing cap, so that the elastic buffer component has a buffer function, when a crankshaft assembled in the bearing bush extrudes the bearing bush under the action of the weight of a flywheel and a shock absorber, the bearing bush elastically deforms along the radial direction, meanwhile, the elastic buffer component buffers the acting force applied to the bearing bush by the crankshaft, thereby effectively reducing the contact stress between the bearing bush and the crankshaft, effectively relieving the phenomenon of fatigue wear on the surface of the bearing bush, prolonging the service life of the bearing bush, and reducing the maintenance and replacement frequency of a main bearing structure, the cost is saved.
The utility model also provides an engine, which adopts the main bearing structure, so that the reliability of the engine is effectively improved, the maintenance and replacement frequency of the engine is effectively reduced, and the cost is saved.
Drawings
FIG. 1 is a schematic structural diagram of a main bearing structure according to an embodiment of the present invention;
fig. 2 is a partial structural schematic diagram of a main bearing structure according to an embodiment of the present invention.
In the figure:
1. a bearing cap; 11. a first slot; 12. an arc-shaped bump; 13. a weight reduction groove;
2. bearing bushes;
3. an elastic buffer component; 31. an elastic sheet; 311. an elastic sheet body; 312. inserting a column; 32. a cushion valve; 321. a first valve housing; 3211. a second slot; 322. a second valve housing; 323. an elastic member.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The utility model provides a main bearing structure, which comprises a bearing cap 1, a bearing bush 2 and two elastic buffer assemblies 3, wherein the bearing cap 1 is provided with an arc-shaped hole, the bearing bush 2 is arc-shaped and is positioned in the arc-shaped hole, the middle part of the bearing bush 2 along the axial direction is in interference fit with the bearing cap 1, and the two elastic buffer assemblies 3 are arranged between the bearing cap 1 and the bearing bush 2 and are respectively positioned at two ends of the bearing bush 2 along the axial direction.
The main bearing structure, as shown in fig. 1, a bearing cap 1 is provided with an arc-shaped hole, a bearing bush 2 is arc-shaped and is positioned in the arc-shaped hole, and the middle part of the bearing bush 2 along the axial direction is in interference fit with the bearing cap 1, so as to assemble the bearing bush 2 in the bearing cap 1, and gaps are formed between both ends of the bearing bush 2 along the axial direction and the bearing cap 1, through arranging an elastic buffer component 3 in the gap formed by the bearing bush 2 and the bearing cap 1, it can be understood that the elastic buffer component 3 has a buffering function, when a crankshaft assembled in the bearing bush 2 extrudes the bearing bush 2 under the action of the weight of a flywheel and a shock absorber, the bearing bush 2 elastically deforms along the radial direction, and at the same time, the elastic buffer component 3 buffers the acting force applied to the bearing bush 2 by the crankshaft, thereby effectively reducing the contact stress between the bearing bush 2 and the crankshaft, and thereby effectively relieving the phenomenon of fatigue wear of the surface of the bearing bush 2, the service life of the bearing bush 2 is prolonged, the maintenance and replacement frequency of the main bearing structure is reduced, and the cost is saved.
As shown in fig. 1 and fig. 2, the elastic buffer assembly 3 includes an elastic sheet 31, the elastic sheet 31 includes an arc-shaped elastic sheet body 311 and an insertion column 312 connected to the elastic sheet body 311, the bearing cap 1 is provided with a first insertion slot 11 communicated with the arc-shaped hole, and the insertion column 312 is slidably inserted into the first insertion slot 11. It can be understood that the elastic piece body 311 and the bearing shell 2 are structurally matched, and by arranging the insertion column 312 of the elastic piece 31 to be slidably inserted into the first insertion groove 11 of the bearing cap 1, it can be understood that the elastic piece 31 can slide along the radial direction thereof. Specifically, when the crankshaft assembled in the bearing bush 2 extrudes the bearing bush 2 under the action of the weight of the flywheel and the shock absorber, the bearing bush 2 elastically deforms along the radial direction, and meanwhile, the bearing bush 2 drives the elastic piece body 311 of the elastic piece 31 to elastically deform along the radial direction and can drive the elastic piece 31 to move along the direction away from the center of the circle along the radial direction, so that the elastic piece 31 can effectively buffer the acting force applied to the bearing bush 2 by the crankshaft, the contact stress between the bearing bush 2 and the crankshaft is effectively reduced, the phenomenon of fatigue wear on the surface of the bearing bush 2 is effectively relieved, the service life of the bearing bush 2 is prolonged, the maintenance and replacement frequency of the main bearing structure is reduced, and the cost is saved.
Preferably, as shown in fig. 1 and fig. 2, the number of the insertion posts 312 and the first insertion slots 11 is two, the two insertion posts 312 are arranged in one-to-one correspondence with the two first insertion slots 11 and are slidably inserted into the two first insertion slots, and the two insertion posts 312 are respectively located at two ends of the elastic sheet body 311 along the circumferential direction. Because the main area of wearing and tearing is the bearing bush 2 along the middle zone of circumference on the bearing bush 2, lie in two along circumference on the bearing bush 2 and insert the region between the post 312, so set up, can make the elastic piece body 311 effectively take place elastic deformation along the region that circumference lies in two and insert between the post 312, also can reduce the outer peripheral face of two tip wearing and tearing bearing bush 2 of elastic piece body 311.
As shown in fig. 1 and 2, the elastic buffer assembly 3 further includes a buffer valve 32, the buffer valve 32 includes a first valve housing 321, a second valve housing 322, and an elastic member 323, the bearing cap 1 further includes a groove communicated with the arc-shaped hole, one of the first valve housing 321 and the second valve housing 322 is fixedly connected to the elastic sheet body 311, the other one of the first valve housing 321 and the second valve housing 322 is fixedly connected to an inner wall of the groove, the first valve housing 321 and the second valve housing 322 are slidably connected to each other and form an accommodating cavity, the elastic member 323 is located in the accommodating cavity, and two ends of the elastic member 323 abut against the first valve housing 321 and the second valve housing 322, respectively. Specifically, when the crankshaft assembled in the bearing bush 2 presses the bearing bush 2 under the action of the weight of the flywheel and the shock absorber, the bearing bush 2 elastically deforms along the radial direction, and at the same time, the bearing bush 2 drives the elastic piece body 311 of the elastic piece 31 to elastically deform along the radial direction and can drive the elastic piece 31 to move along the radial direction away from the center of a circle, the elastic piece body 311 presses the cushion valve 32 along the radial direction away from the center of a circle, and the first valve shell 321 and the second valve shell 322 of the cushion valve 32 relatively slide to compress the elastic piece 323, it can be understood that the elastic piece 323 has elasticity and can buffer the acting force applied to the cushion valve 32, so that the acting force applied to the bearing bush 2 by the crankshaft is further buffered through the cushion valve 32, thereby further reducing the contact stress between the bearing bush 2 and the crankshaft, and further relieving the phenomenon of fatigue wear on the surface of the bearing bush 2. In this embodiment, the first valve housing 321 is fixedly disposed on the inner wall of the groove, and the second valve housing 322 is fixedly disposed on the elastic sheet body 311.
Preferably, the first valve housing 321 and the bearing cap 1 are integrally formed. So as to reduce the processing cost and reduce the assembly steps. As an alternative, the first valve housing 321 can also be welded or screwed to the bearing cap 1. The second valve case 322 is welded to the elastic piece body 311.
Specifically, one of the first valve housing 321 and the second valve housing 322 is provided with a second slot 3211, and the other is slidably inserted into the second slot 3211. So arranged as to enable sliding insertion of the first valve housing 321 and the second valve housing 322. In this embodiment, as shown in fig. 1 and fig. 2, the first valve casing 321 is fixedly disposed on an inner wall of the groove and is provided with a second slot 3211, and the second valve casing 322 is fixedly disposed on the elastic sheet body 311, specifically, the second valve casing 322 is disposed on one side of the elastic sheet body 311 close to the bearing cap 1, and the second valve casing 322 is slidably inserted into the second slot 3211. As an alternative, the first valve casing 321 is fixedly disposed on the inner wall of the groove, the second valve casing 322 is disposed on one side of the elastic sheet body 311 close to the bearing cap 1, the second valve casing 322 is provided with a second slot 3211, and the first valve casing 321 is slidably inserted into the second slot 3211.
Specifically, the elastic member 323 is a spring. The spring has the elastic buffering capacity and is low in cost. In other embodiments, the elastic member 323 may be made of a rubber material, or other materials having elastic buffering ability.
Specifically, as shown in fig. 1, the elastic buffer assembly 3 includes a plurality of buffer valves 32, and the plurality of buffer valves 32 are spaced apart from each other in the circumferential direction of the elastic sheet body 311. The plurality of cushion valves 32 work together to further cushion the contact stress between the bearing shell 2 and the crankshaft. Preferably, the plurality of cushion valves 32 are evenly spaced along the circumferential direction of the elastic sheet body 311. Thus, the force applied to the plurality of cushion valves 32 is uniform.
As shown in fig. 1, an arc-shaped protrusion 12 is disposed on an inner wall of the arc-shaped hole, and the bearing bush 2 is in interference fit with the arc-shaped protrusion 12. So set up to realize axle bush 2 and 1 interference fit of bearing cap, and make and form the clearance between axle bush 2 and the bearing cap 1. It can be understood that the arc-shaped projection 12 is located at the middle position of the bearing cap 1 in the axial direction, and the two elastic buffer assemblies 3 are respectively located at two sides of the arc-shaped projection 12 in the axial direction.
Wherein the bearing cap 1 is provided with lightening slots 13, as shown in fig. 1. The weight-reducing grooves 13 are formed in the bearing cap 1, so that the weight of the bearing cap 1 can be effectively reduced, and the weight of the main bearing structure can be reduced. The risk of weakening the structural strength of the bearing cap 1 due to the weight-reducing grooves 13 provided in the bearing cap 1 can also be avoided by providing the elastic damping elements 3 between the bearing shell 2 and the bearing cap 1.
The utility model also provides an engine, which adopts the main bearing structure, so that the reliability of the engine is effectively improved, the maintenance and replacement frequency of the engine is effectively reduced, and the cost is saved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A main bearing structure, comprising:
the bearing cover (1), the said bearing cover (1) has arcuate holes;
the bearing bush (2) is arc-shaped and is positioned in the arc-shaped hole, and the middle part of the bearing bush (2) along the axial direction is in interference fit with the bearing cover (1);
the two elastic buffer assemblies (3) are arranged between the bearing cover (1) and the bearing bush (2) and are respectively positioned at two ends of the bearing bush (2) along the axial direction.
2. The main bearing structure of claim 1, wherein the elastic buffer assembly (3) comprises an elastic sheet (31), the elastic sheet (31) comprises an arc-shaped elastic sheet body (311), and an insertion column (312) connected to the elastic sheet body (311), the bearing cap (1) is provided with a first insertion groove (11) communicated with the arc-shaped hole, and the insertion column (312) is slidably inserted into the first insertion groove (11).
3. The main bearing structure of claim 2, wherein the jounce bumper assembly (3) further comprises a cushion valve (32), the cushion valve (32) comprises a first valve housing (321), a second valve housing (322), and an elastic member (323), the bearing cap (1) further comprises a groove communicating with the arc-shaped hole, one of the first valve housing (321) and the second valve housing (322) is fixedly connected to the spring plate body (311), the other one of the first valve housing (321) and the second valve housing (322) is fixedly connected to an inner wall of the groove, the first valve housing (321) and the second valve housing (322) are slidably connected and form a receiving cavity, the elastic member (323) is located in the receiving cavity, and two ends of the elastic member (323) abut against the first valve housing (321) and the second valve housing (322), respectively.
4. The main bearing structure of claim 3, wherein one of the first valve housing (321) and the second valve housing (322) is provided with a second slot (3211), and the other is slidably inserted into the second slot (3211).
5. The main bearing structure according to claim 3, wherein the elastic member (323) is a spring.
6. The main bearing structure according to claim 3, wherein the elastic damping assembly (3) includes a plurality of the damping valves (32), and the plurality of the damping valves (32) are spaced apart in a circumferential direction of the elastic sheet body (311).
7. The main bearing structure of claim 2, wherein the number of the insert columns (312) and the number of the first insert grooves (11) are two, the two insert columns (312) and the two first insert grooves (11) are arranged in a one-to-one correspondence and are slidably inserted, and the two insert columns (312) are respectively located at two end portions of the elastic sheet body (311) along the circumferential direction.
8. The main bearing arrangement according to any of claims 1 to 7, wherein the inner wall of the arc-shaped bore is provided with an arc-shaped protrusion (12), and the bearing shell (2) is in an interference fit with the arc-shaped protrusion (12).
9. The main bearing structure of any one of claims 1 to 7, wherein the bearing cap (1) is provided with weight-reducing grooves (13).
10. An engine comprising the main bearing structure of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123375201.4U CN216975511U (en) | 2021-12-29 | 2021-12-29 | Main bearing structure and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123375201.4U CN216975511U (en) | 2021-12-29 | 2021-12-29 | Main bearing structure and engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216975511U true CN216975511U (en) | 2022-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123375201.4U Active CN216975511U (en) | 2021-12-29 | 2021-12-29 | Main bearing structure and engine |
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| Country | Link |
|---|---|
| CN (1) | CN216975511U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117307610A (en) * | 2023-10-30 | 2023-12-29 | 浙江申发轴瓦股份有限公司 | Bearing bush and compounding process thereof |
-
2021
- 2021-12-29 CN CN202123375201.4U patent/CN216975511U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117307610A (en) * | 2023-10-30 | 2023-12-29 | 浙江申发轴瓦股份有限公司 | Bearing bush and compounding process thereof |
| CN117307610B (en) * | 2023-10-30 | 2024-02-23 | 浙江申发轴瓦股份有限公司 | Bearing bush and compounding process thereof |
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