CN219712025U - Connecting rod and crankshaft mechanism - Google Patents
Connecting rod and crankshaft mechanism Download PDFInfo
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- CN219712025U CN219712025U CN202320421285.0U CN202320421285U CN219712025U CN 219712025 U CN219712025 U CN 219712025U CN 202320421285 U CN202320421285 U CN 202320421285U CN 219712025 U CN219712025 U CN 219712025U
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- connecting rod
- arc
- butt joint
- tooth
- teeth
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- 210000001503 joint Anatomy 0.000 claims abstract description 52
- 238000000034 method Methods 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model discloses a connecting rod and a crankshaft mechanism, wherein the connecting rod comprises a connecting rod body and a connecting rod cover, the connecting rod body comprises a rod part and a connecting rod head part positioned at one end of the rod part, the connecting rod head part and the connecting rod cover are in butt joint to form a circular connecting part, and the circular connecting part is used for connecting a crankshaft; the connecting rod head is provided with two first butt joint surfaces, the connecting rod cover is provided with two second butt joint surfaces, the first butt joint surfaces are in butt joint with the second butt joint surfaces, the first butt joint surfaces are provided with first arc-shaped teeth, the second butt joint surfaces are provided with second arc-shaped teeth, and the first arc-shaped teeth and the second arc-shaped teeth can be meshed; and the circle center of the first arc-shaped tooth is positioned at the outer side of the first arc-shaped tooth, and the circle center of the second arc-shaped tooth is also positioned at the outer side of the second arc-shaped tooth. The connecting rod does not need positioning pin to assist in positioning during assembly, and can realize self-positioning, so that the assembly process is simplified.
Description
Technical Field
The utility model relates to the technical field of engines, in particular to a connecting rod and a crankshaft mechanism.
Background
A crankshaft in the crankshaft mechanism is connected with the piston through a connecting rod, and the connecting rod can transmit gas force born by the piston to the crankshaft, so that reciprocating motion of the piston is converted into rotary motion of the crankshaft.
The structure of the crankshaft is irregular, and when the crankshaft is connected with the connecting rod, the connecting hole of the connecting rod is formed by butt joint, namely the connecting rod generally comprises a connecting rod body and a connecting rod cover, the connecting rod body is provided with a semicircular notch, and the connecting rod cover is also provided with a semicircular notch, and the connecting rod body and the connecting rod cover can be butt-jointed to form a circular hole to be matched with the crankshaft. In order to improve the reliability of butt joint, the butt joint surfaces of the connecting rod body and the connecting rod cover are provided with tooth parts, the tooth parts are straight teeth, the straight teeth extend along the axial direction of the semicircular notch, and the straight teeth of the connecting rod body and the connecting rod cover are mutually meshed. In the assembling process, a positioning pin is arranged, the connecting rod body and the connecting rod cover are axially positioned in advance, and then the assembly is carried out, so that the assembly is complex.
Disclosure of Invention
The utility model aims to provide a connecting rod and a crankshaft mechanism, which can realize self-positioning without positioning pin auxiliary positioning during assembly, so that the assembly process is simplified.
The utility model provides a connecting rod which is used for connecting a crankshaft with a piston, and comprises a connecting rod body and a connecting rod cover, wherein the connecting rod body comprises a rod part and a connecting rod head part positioned at one end of the rod part, the connecting rod head part and the connecting rod cover are in butt joint to form a circular connecting part, and the circular connecting part is used for connecting the crankshaft;
the connecting rod head is provided with two first butt joint surfaces, the connecting rod cover is provided with two second butt joint surfaces, the first butt joint surfaces are in butt joint with the second butt joint surfaces, the first butt joint surfaces are provided with first arc-shaped teeth, the second butt joint surfaces are provided with second arc-shaped teeth, and the first arc-shaped teeth and the second arc-shaped teeth can be meshed; and the circle center of the first arc-shaped tooth is positioned at the outer side of the first arc-shaped tooth, and the circle center of the second arc-shaped tooth is also positioned at the outer side of the second arc-shaped tooth.
In a specific embodiment, the first arcuate teeth of the two first abutment surfaces are symmetrically arranged along a radial direction of the connecting rod head, and the second arcuate teeth of the two second abutment surfaces are symmetrically arranged along a radial direction of the connecting rod cover.
In a specific embodiment, the first abutment surface is provided with a plurality of the first arcuate teeth distributed along a radial direction of the connecting rod head; the second butt joint surface is provided with a plurality of second arc-shaped teeth distributed along the radial direction of the connecting rod cover.
In one specific embodiment, the connecting rod head is provided with a first connecting hole, the connecting rod cover is provided with a second connecting hole, and the connecting rod body and the connecting rod cover are connected through a fastener inserted into the first connecting hole and the second connecting hole.
In one embodiment, the fastener is a bolt.
In one specific embodiment, the first connecting hole is disposed on the first abutting surface, and the first connecting hole penetrates through part of the first arc-shaped tooth; the second connecting hole is arranged on the second butt joint surface, and the second connecting hole penetrates through part of the second arc-shaped tooth.
In a specific embodiment, the first butt joint surface is provided with a first connecting hole, and the second butt joint surface is provided with a second connecting hole; the connecting lines of the two first connecting holes on the two first butt joint surfaces are collinear with the circle centers of the first arc-shaped teeth; and the connecting lines of the two second connecting holes on the two second butt joint surfaces are collinear with the circle centers of the second arc-shaped teeth.
The utility model also provides a crankshaft mechanism, which comprises a crankshaft and a connecting rod, wherein the connecting rod is any one of the connecting rods, the first butt joint surface and the second butt joint surface of the connecting rod are in butt joint to form an annular connecting part, and the crankshaft penetrates through the annular connecting part.
In this application, the first arc tooth of the link body and the second arc tooth of the link cover interlock each other, not only restrict the displacement of the link body and the link cover in the radial direction, because the curved setting can also restrict axial displacement, it can be seen from this, because tooth portion on the butt joint face sets up to arc tooth, can realize axial positioning function, as long as first arc tooth and second arc tooth mesh in place promptly, then link cover and link body are installed in place, need not the locating pin and carry out auxiliary positioning during the equipment, the equipment process is simplified.
In addition, when the position where the connecting rod body and the connecting rod cover are in butt joint is stressed, the force acting on the arc-shaped teeth can decompose the axial component force, so that the radial component force is reduced, and the reliability of tooth shape can be improved. Moreover, the circle centers of the arc teeth are positioned on the outer side, so that the arc notch direction of the first arc tooth faces outwards, and the arc notch direction of the second arc tooth faces outwards. The first arc teeth or the second arc teeth on the two butt joint surfaces can counteract each other if being stressed at the same time, so that the influence of the stress on the tooth parts is reduced. In addition, because the circle center of each arc tooth faces to the outer side, the axial component force of each arc tooth when being stressed is converged and offset towards the middle part, and if the circle center is located at the inner side, the axial component force of each arc tooth is dispersed towards the two sides to pull the arc tooth, so that the scheme that the circle center of each arc tooth is located at the outer side in the embodiment has superior stress performance.
Drawings
FIG. 1 is an exploded view of a connecting rod according to an embodiment of the present utility model;
FIG. 2 is a front view of the link body of the link of FIG. 1;
fig. 3 is a front view of a link cover of the link of fig. 1.
Fig. 4 is a schematic view of an embodiment of the present utility model after the first arcuate tooth and the second arcuate tooth are engaged.
The reference numerals in fig. 1-4 are illustrated as follows:
1-a connecting rod body; 11-the tail of the connecting rod; 11 a-a hole portion; 12-a stem; 13-a connecting rod head; 131-a first abutment surface; 1311-first arcuate teeth; 131 a-first connection holes.
2-a connecting rod cover; 21-a second abutment surface; 211-second arcuate teeth; 21 a-a second connection hole; 22-hole seat;
Detailed Description
In order to better understand the aspects of the present utility model, the present utility model will be described in further detail with reference to the accompanying drawings and detailed description.
Referring to fig. 1, fig. 1 is an exploded view of a connecting rod according to an embodiment of the utility model.
The connecting rod in this embodiment is used for connecting a crankshaft and a piston, the connecting rod comprises a connecting rod body 1 and a connecting rod cover 2, the connecting rod body 1 comprises a rod part 12 and a connecting rod head part 13 positioned at one end of the rod part 12, the other end of the rod part 12 is a connecting rod tail part 11, the connecting rod tail part 11 is provided with a hole part 11a for connecting with the piston, and the connecting rod head part 13 of the connecting rod is in butt joint with the connecting rod cover 2 to form an annular connecting part connected with the crankshaft. As can be seen from fig. 1, the connecting rod head 13 has a semicircular notch, the connecting rod cover 2 also has a semicircular notch, and after the two are butted, a complete circular connecting part is formed, and the crankshaft can pass through the circular connecting part to realize connection with the connecting rod, namely, the connecting rod cover 2 and the connecting rod head 13 are butted and then encircle the crankshaft, and the cross section of the crankshaft is circular, so that the circular connecting part is formed, but the arc notch formed by the butting of the two semicircular notches is not required, namely, the arc notch formed by the connecting rod head 13 and the connecting rod cover 2 is not limited to be semicircular, as long as the arc notch is butted to form the circular connecting part.
As can be further understood with reference to fig. 2 and 3, fig. 2 is a front view of the link body 1 of the link in fig. 1, and is a front view of two first abutment surfaces 131; fig. 3 is a front view of the connecting rod cover 2 of the connecting rod in fig. 1, which is a front view of two second butt surfaces 21.
At this time, the link head 13 has two first abutment surfaces 131, that is, both end surfaces of the arc-shaped recess of the link head 13 in the circumferential direction are the first abutment surfaces 131; accordingly, the link cover 2 has two second abutment surfaces 21, i.e., both end surfaces of the arc-shaped recess of the link cover 2 in the circumferential direction are the second abutment surfaces 21. The first abutting surface 131 and the second abutting surface 21 abut against each other, that is, one first abutting surface 131 and the corresponding second abutting surface 21 abut against each other, and form two groups of abutting surfaces. Moreover, the first abutting surface 131 is provided with a first arc-shaped tooth 1311, the second abutting surface 21 is provided with a second arc-shaped tooth 211, and the first arc-shaped tooth 1311 and the second arc-shaped tooth 211 can be meshed, that is, after the connecting rod head 13 and the connecting rod cover 2 are abutted, the first arc-shaped tooth 1311 and the second arc-shaped tooth 211 are meshed or meshed.
In addition, in the present embodiment, the center of the first arc-shaped tooth 1311 is located at the outer side, and the center of the second arc-shaped tooth 211 is also located at the outer side. The center O1 and radius R1 of the first arcuate tooth 1311 are illustrated in fig. 2, and the center O2 and radius R2 of the second arcuate tooth 211 are illustrated in fig. 3. The side of the first arc-shaped tooth 1311 on one first abutting surface 131, which is close to the other first abutting surface 131, is the inner side, and the side, which is far away from the other first abutting surface 131, is the outer side; the second arcuate tooth 211 on one second abutment surface 21 is inboard on the side closer to the other second abutment surface 131 and outboard on the side farther away. As shown in fig. 2, the arcuate recess of the first arcuate tooth 1311 on the first abutment surface 131 on the left side is directed to the left, away from the first abutment surface 131 on the right side, and the arcuate recess of the first arcuate tooth 1311 on the first abutment surface 131 on the right side is directed to the right, away from the first abutment surface 131 on the left side; the same principle as the first arcuate tooth 1311 is provided. As shown in fig. 3, the arcuate recess of the second arcuate tooth 211 on the second abutment surface 21 on the left side is directed leftward and the arcuate recess of the second arcuate tooth 211 on the second abutment surface 21 on the right side is directed rightward.
As can be appreciated in conjunction with fig. 4, fig. 4 is a schematic view of the first arcuate tooth 1311 and the second arcuate tooth 121 after engagement in accordance with an embodiment of the utility model.
So set up, after the equipment, first arc tooth 1311 and second arc tooth 211 interlock each other, not only restrict the displacement of link body 1 and connecting rod lid 2 in the radial direction, because the setting of arc can also restrict axial displacement, here axial, radial that is the axial, the radial of the ring form connecting portion that forms after the equipment. It can be seen that, in this embodiment, since the tooth portion on the abutting surface is configured as an arc tooth, the axial positioning function can be realized, that is, as long as the first arc tooth 1311 and the second arc tooth 211 can be engaged in place, the connecting rod cover 2 and the connecting rod body 1 are installed in place, and no positioning pin is needed for auxiliary positioning during assembly. In addition, when the position where the link body 1 and the link cover 2 are abutted is subjected to force, the force acting on the arcuate teeth can be decomposed into axial force components, so that radial force components are reduced, and the slip force causing damage to the teeth is mainly from the radial direction, so that the structure can improve the reliability of the tooth shape.
In addition, the centers of the arcuate teeth are located outside such that the arcuate recess directions of both the first arcuate teeth 1311 are outward and the arcuate recess directions of both the second arcuate teeth 211 are also outward. Because the circle center of the arc teeth faces to the outer side, after the arc teeth of the connecting rod head 13 and the connecting rod cover 2 are matched, relative rotation can not occur, and the stress performance is excellent and reliable. Moreover, if the forces are applied simultaneously, the first arcuate teeth 1311 on the two first abutting surfaces 131 or the second arcuate teeth 211 on the two second abutting surfaces 21 can cancel each other out, thereby reducing the influence of the forces on the teeth.
Further, in this embodiment, the first arcuate teeth 1311 of the two first abutting surfaces 131 are symmetrically arranged along the radial direction of the connecting rod head 13, and the second arcuate teeth 211 of the two second abutting surfaces 21 are symmetrically arranged along the radial direction of the connecting rod cover 2, so that the radial directions of the connecting rod head 13 and the connecting rod cover 2 are also the radial directions of the annular connecting parts formed after the two abutting surfaces. And the bearing is symmetrically arranged along the radial direction, so that the bearing force is balanced after the butt joint.
Specifically, the first abutment surface 131 is provided with a plurality of first arcuate teeth 1311 distributed in the radial direction of the link head 13; the second abutment surface 21 is provided with a plurality of second arc-shaped teeth 211 distributed in the radial direction of the link cover 2. The arrangement of the plurality of teeth can increase the reliability of occlusion, thereby improving the reliability of butt joint.
In addition, in the present embodiment, the connecting rod head 13 of the connecting rod body 1 is provided with the first connecting hole 131a, the connecting rod cover 2 is provided with the second connecting hole 21a, the connecting rod body 1 and the connecting rod cover 2 are connected by the fastener inserted into the first connecting hole 131a and the second connecting hole 21a, for example, the bolt 3 shown in fig. 1 is used as the fastener, and the bolt 3 has a simple structure and reliable connection. By fastening the fastener, the separation of the link body 1 and the link cover 2 in the butt direction can be restricted, and the assembly reliability can be ensured. Of course, the two may be fixed by other means after assembly, such as tightening.
Referring again to fig. 1-3, the first connecting hole 131a in this embodiment is disposed on the first abutting surface 131, and the first connecting hole 131a penetrates a portion of the first arcuate tooth 1311; the second connection hole 21a is disposed on the second abutting surface 21, and the second connection hole 21a penetrates a portion of the second arc-shaped tooth 211. The connecting hole is arranged on the butt joint surface, so that other positions are not required to be additionally arranged for inserting a fastener, the structure is more compact, the connecting hole is directly inserted on the butt joint surface, the anti-loosening effect is better, and the force acting on the arc-shaped teeth can be directly transmitted to the bolt, so that the influence on the teeth is reduced. The first connecting hole 131a may be perpendicular to the first abutting surface 131, the second connecting hole 21a may be perpendicular to the second abutting surface 21, in order to ensure the depth of the connecting hole, the connecting rod cover 2 is not an arc portion, hole seats 22 are further disposed on two sides of the connecting rod cover, the second connecting hole 21a extends to the through hole seats 22 after penetrating the second abutting surface 21, the connecting rod head 13 is connected with the rod portion 12, and the deeper first connecting hole 131a is easier to be disposed in the structure.
As can be appreciated with continued reference to fig. 2 and 3, the first abutment surface 131 is provided with a first connection hole 131a and the second abutment surface 21 is provided with a second connection hole 21a. And, the connecting line L1 of the two first connecting holes 131a on the two first butt joint surfaces 131 and the circle center O1 of the first arc-shaped tooth 1311 are collinear; the line L2 of the two second connection holes 21a on the two second abutting surfaces 21 and the circle center O2 of the second arc-shaped tooth 211 are collinear. So set up, after the fastener inserts corresponding connecting hole, the atress is symmetrical, even.
The embodiment also provides a crankshaft mechanism, which comprises a crankshaft and a connecting rod, wherein the connecting rod is the connecting rod in any one of the embodiments, the first butt joint surface 131 and the second butt joint surface 21 of the connecting rod are in butt joint to form an annular connecting part, and the crankshaft penetrates through the annular connecting part. The crankshaft mechanism has the same technical effects as those of the connecting rod embodiment, and is not repeated.
The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (8)
1. The connecting rod is used for connecting a crankshaft with a piston and is characterized by comprising a connecting rod body and a connecting rod cover, wherein the connecting rod body comprises a rod part and a connecting rod head part positioned at one end of the rod part, the connecting rod head part and the connecting rod cover are in butt joint to form a circular connecting part, and the circular connecting part is used for connecting the crankshaft;
the connecting rod head is provided with two first butt joint surfaces, the connecting rod cover is provided with two second butt joint surfaces, the first butt joint surfaces are in butt joint with the second butt joint surfaces, the first butt joint surfaces are provided with first arc-shaped teeth, the second butt joint surfaces are provided with second arc-shaped teeth, and the first arc-shaped teeth and the second arc-shaped teeth can be meshed; and the circle center of the first arc-shaped tooth is positioned at the outer side of the first arc-shaped tooth, and the circle center of the second arc-shaped tooth is also positioned at the outer side of the second arc-shaped tooth.
2. The connecting rod of claim 1, wherein the first arcuate teeth of the two first abutment surfaces are symmetrically disposed along a radial direction of the connecting rod head and the second arcuate teeth of the two second abutment surfaces are symmetrically disposed along a radial direction of the connecting rod cover.
3. The connecting rod according to claim 2, wherein the first abutment surface is provided with a plurality of the first arcuate teeth distributed along a radial direction of the connecting rod head; the second butt joint surface is provided with a plurality of second arc-shaped teeth distributed along the radial direction of the connecting rod cover.
4. A connecting rod according to any one of claims 1-3, wherein the connecting rod head is provided with a first connecting hole and the connecting rod cover is provided with a second connecting hole, and the connecting rod body and the connecting rod cover are connected by a fastener inserted into the first connecting hole and the second connecting hole.
5. The connecting rod of claim 4, wherein the fastener is a bolt.
6. The connecting rod of claim 4, wherein the first connection hole is disposed in the first abutment surface and the first connection hole extends through a portion of the first arcuate tooth; the second connecting hole is arranged on the second butt joint surface, and the second connecting hole penetrates through part of the second arc-shaped tooth.
7. The connecting rod of claim 6, wherein said first abutment surface defines a first connection aperture and said second abutment surface defines a second connection aperture; the connecting lines of the two first connecting holes on the two first butt joint surfaces are collinear with the circle centers of the first arc-shaped teeth; and the connecting lines of the two second connecting holes on the two second butt joint surfaces are collinear with the circle centers of the second arc-shaped teeth.
8. A crankshaft mechanism, comprising a crankshaft and a connecting rod, wherein the connecting rod is the connecting rod according to any one of claims 1-7, the first abutting surface and the second abutting surface of the connecting rod form an annular connecting part after abutting, and the crankshaft passes through the annular connecting part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320421285.0U CN219712025U (en) | 2023-03-02 | 2023-03-02 | Connecting rod and crankshaft mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320421285.0U CN219712025U (en) | 2023-03-02 | 2023-03-02 | Connecting rod and crankshaft mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219712025U true CN219712025U (en) | 2023-09-19 |
Family
ID=88004286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320421285.0U Active CN219712025U (en) | 2023-03-02 | 2023-03-02 | Connecting rod and crankshaft mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219712025U (en) |
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2023
- 2023-03-02 CN CN202320421285.0U patent/CN219712025U/en active Active
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