CN220372771U - Balance structure for crankshaft machining - Google Patents
Balance structure for crankshaft machining Download PDFInfo
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- CN220372771U CN220372771U CN202321016886.XU CN202321016886U CN220372771U CN 220372771 U CN220372771 U CN 220372771U CN 202321016886 U CN202321016886 U CN 202321016886U CN 220372771 U CN220372771 U CN 220372771U
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- crankshaft
- connecting shaft
- balance structure
- crankshaft machining
- machining according
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- 238000003754 machining Methods 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000306 component Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model relates to the technical field of crankshaft machining, in particular to a balance structure for crankshaft machining. The balance structure for crankshaft machining comprises two connecting shafts, two connecting pieces, two crank arms and a counterweight assembly. The two connecting shafts are arranged at intervals, and the axes of the two connecting shafts are collinear. One axial end of each connecting shaft far away from the other connecting shaft is connected with a connecting piece, one connecting piece is used for being connected with a main journal at the end part of the crankshaft, the axes of the connecting shafts and the main journal are collinear, and the other connecting piece is used for being clamped on a machine tool. One axial end of each connecting shaft, which is close to the other connecting shaft, is connected with a crank arm. The counterweight component is detachably connected with the two crank arms respectively and is eccentrically arranged relative to the connecting shaft, and the counterweight component and the connecting shaft are used together to counteract the unbalanced weight of the crankshaft. The problem of the unbalance weight when large-scale bent axle is processed is solved, and only need change different counter weight subassemblies, this balanced structure can adapt to the bent axle of different specifications, saves manufacturing cost.
Description
Technical Field
The utility model relates to the technical field of crankshaft machining, in particular to a balance structure for crankshaft machining.
Background
The crankshaft is a core component of the engine and serves as a transmission body for transmitting power, and plays an extremely important role in the running process of driving vehicles and ships. The space shape of the crankshaft of the marine low-speed high-power diesel engine is complex, and the whole mass is large. When the crankshaft is machined on a lathe, the machining is unstable and even the lathe cannot be driven due to the fact that the crankshaft has large eccentric weight. Therefore, a counterweight device is required to be introduced during crankshaft machining, and the eccentric weight of the crankshaft is counteracted by the counterweight device so as to ensure the stability of crankshaft machining.
In the prior art, a counterweight device is usually arranged on a fixture of a machine tool to offset the offset of a crankshaft. However, as the size and weight of the crankshaft increases, the size and weight of the counterweight device may also increase. The clamping operation of the counterweight device and the clamp is more difficult, so that the counterweight device in the prior art is only suitable for a smaller crankshaft. The weight of the crankshaft for the large-scale ship reaches hundreds of tons, the eccentric weight of the crankshaft reaches tens of tons, and the counterweight device with the weight of tens of tons is difficult to clamp on the clamp. And different counterweight devices are required to be produced so as to be suitable for crankshafts with different specifications, and the cost is high.
Accordingly, there is a need for a balancing structure for crankshaft machining that addresses the above-described issues.
Disclosure of Invention
The utility model aims to provide a balance structure for crankshaft machining, which solves the problems that a counterweight device in the prior art cannot be suitable for machine tool machining of a large-scale crankshaft and has higher cost for producing different counterweight devices.
In order to achieve the above object, the following technical scheme is provided:
a balanced structure for bent axle processing, bent axle include main journal, and balanced structure for bent axle processing includes:
the two connecting shafts are arranged at intervals, and the axes of the two connecting shafts are collinear;
the two connecting pieces are connected to one axial end of each connecting shaft far away from the other connecting shaft, one of the connecting pieces is used for being connected with a main journal at the end part of the crankshaft, the axes of the connecting shafts and the main journal are collinear, and the other of the two connecting pieces is used for being clamped on a machine tool;
the two crank arms are connected with one axial end of each connecting shaft, which is close to the other connecting shaft;
and the counterweight component is detachably connected with the two crank arms respectively and is eccentrically arranged relative to the connecting shaft.
Preferably, the counterweight assembly comprises a plurality of counterweights of the same weight or different weights, and at least one counterweight can be selectively connected between the two crank arms so as to realize the weight adjustment of the counterweight assembly.
Preferably, the weight is bolted to the crank arm.
Preferably, the two crank arms are provided with first connecting holes, the two connecting pieces are provided with second connecting holes, and two ends of the connecting shaft are in interference fit with the first connecting holes and the second connecting holes respectively.
Preferably, the connecting shaft includes two abutting portions, the abutting portions being located on an outer circumferential surface of the connecting shaft, and the crank arm and the connecting member both abutting the abutting portions.
Preferably, the abutment portion extends in a circumferential direction of the connecting shaft and is connected end to end.
Preferably, a positioning through hole is provided in an axial end face of the connecting shaft for positioning the crankshaft at a machining position of the machine tool.
Preferably, the connecting piece is provided with a third connecting hole for connection with the main journal.
Preferably, a plurality of third connecting holes are provided, and the plurality of third connecting holes are equidistantly arranged along the circumferential edge of the connecting piece.
Preferably, the connection is a flange.
Compared with the prior art, the utility model has the beneficial effects that:
according to the balance structure for crankshaft machining, one of the connecting shafts is connected with the main journal at the end part of the crankshaft through the connecting piece, so that the balance structure and the crankshaft are connected into a whole, and the balance weight assemblies connected with the two crank arms can offset the eccentric weight of the crankshaft. And then clamping the balance structure and the crankshaft on a clamp on a machine tool together. The balancing structure is connected with the crankshaft before the crankshaft is machined, and the crankshaft is machined after the eccentric weight of the crankshaft is counteracted. And the counterweight component is detachably connected with the two crank arms respectively, so that the counterweight components with different weights can be replaced to adapt to crankshafts with different specifications, the universality of the balance structure is stronger, only the counterweight component is required to be replaced, and the overall production cost of the balance structure is reduced. The balance structure for crankshaft machining is simple in overall structure, convenient to operate and suitable for large-scale crankshaft machining.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic diagram of a balance structure for crankshaft machining according to the present utility model;
fig. 2 is a schematic structural view of a connecting shaft according to the present utility model.
Reference numerals:
1. a connecting shaft; 11. an abutting portion; 12. positioning the through hole; 2. a connecting piece; 22. a third connection hole; 3. a crank arm; 4. a counterweight assembly.
Detailed Description
In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present utility model, the terms "upper," "lower," "left," "right," and the like are used for convenience of description and simplicity of operation based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
As shown in fig. 1, the present embodiment provides a balance structure for crank processing including two connecting shafts 1, two connecting members 2, two crank arms 3, and a weight assembly 4. The two connecting shafts 1 are arranged at intervals, and the axes of the two connecting shafts 1 are collinear. One axial end of each connecting shaft 1 far away from the other connecting shaft 1 is connected with a connecting piece 2, one connecting piece 2 is used for being connected with a main journal at the end of a crankshaft, the axes of the connecting shafts 1 and the main journal are collinear, and the other connecting piece 2 is used for being clamped on a machine tool. One axial end of each connecting shaft 1, which is close to the other connecting shaft 1, is connected with a crank arm 3. The counterweight assembly 4 is detachably connected with the two crank arms 3 respectively and is eccentrically arranged relative to the connecting shaft 1 so as to play a role in counteracting the offset of the crankshaft.
Taking the example of setting one balance structure at one end of the crankshaft, when in use, one of the connecting shafts 1 is connected with the main journal at the end of the crankshaft through the connecting piece 2, so that the balance structure and the crankshaft are connected into a whole, and a person skilled in the art can adjust the connecting angle of the connecting piece 2 and the main journal according to the deflection angle of the connecting rod shaft diameter of the crankshaft, so that the counterweight assembly 4 is positioned at a position capable of counteracting the deflection of the crankshaft. Then clamping the balance structure and the crankshaft on a clamp on a machine tool together, clamping a connecting piece 2 connected to the other connecting shaft 1 on one clamp on the machine tool, and clamping one end of the crankshaft, on which the balance structure is not mounted, on the other clamp on the machine tool. Thus, the problem of heavy weight during processing of the large-scale crankshaft is solved. In addition, the counterweight component 4 is detachably connected with the two crank arms 3 respectively, and the counterweight component 4 with different weights only needs to be replaced, so that the counterweight structure can be adapted to crankshafts with different specifications, and the overall production cost of the counterweight structure is greatly saved.
Wherein, the person skilled in the art can set up this balanced structure in the tip of bent axle as required, can set up this balanced structure in the one end of bent axle, also can all set up this balanced structure at the both ends of bent axle, and the setting quantity of this balanced structure is decided by the person skilled in the art according to actual conditions to offset the eccentric weight of bent axle. If a plurality of balance structures are arranged at one end of the crankshaft, the two balance structures are connected through a connecting piece 2 on the body of the crankshaft.
Further, the weight assembly 4 comprises a plurality of balancing weights with the same weight or different weights, and at least one balancing weight can be selectively connected between the two crank arms 3, so that the weight of the weight assembly 4 can be adjusted.
Further, in order to facilitate replacement of the weight, the weight is bolted to the crank arm 3. One of the crank arms 3 is provided with a threaded hole, the other crank arm 3 and the balancing weight are provided with threaded through holes, and a bolt penetrates through the threaded through holes to be connected with the threaded hole of one of the crank arms 3. The arrangement of the counterweights of different specifications between the two crank arms 3 makes the spacing between the two crank arms 3 different. Thus, the present embodiment includes bolts of multiple length gauges to match the installation of counterweights of different gauges.
Further, the two crank arms 3 are provided with first connecting holes, the two connecting pieces 2 are provided with second connecting holes, and two ends of the connecting shaft 1 are in interference fit with the first connecting holes and the second connecting holes respectively.
Preferably, the connecting shaft 1 is connected with the crank arm 3 and the connecting piece 2 in a red set assembly manner, so that the connecting shaft 1 is connected with the crank arm 3 and the connecting piece 2 more firmly.
Further, as shown in fig. 2, the connecting shaft 1 includes two abutting portions 11, the abutting portions 11 being located on the outer circumferential surface of the connecting shaft 1, and both the crank arm 3 and the connecting member 2 abutting against the abutting portions 11. When the connecting shaft 1 is connected to the crank arm 3 and the connecting member 2, respectively, the abutting portion 11 plays a role of thrust so that the connecting position is more accurate.
Further, in order to make the thrust effect better, the abutment portion 11 extends in the circumferential direction of the connecting shaft 1 and is connected end to end.
Further, the connecting shaft 1 is provided with a positioning through hole 12 for positioning the crankshaft at a machining position of the machine tool. The positioning through hole 12 is matched with a tail cone on the machine tool to position the crankshaft, the axis of the positioning through hole 12 and the axis of the connecting shaft 1 are positioned on the same straight line, the positioning through hole 12 is easier to position at the axis of the connecting shaft 1, and the crankshaft is positioned more accurately.
Further, the connecting piece 2 is provided with a third connecting hole 22, the third connecting hole 22 is used for being connected with the main journal, the connecting hole 22 is provided with a plurality of connecting holes, the plurality of connecting holes 22 are equidistantly arranged along the circumferential edge of the connecting piece 2, and the plurality of connecting holes 22 are distributed in a circular array. The end face of the main journal is provided with a plurality of mounting holes corresponding to the plurality of connecting holes 22, and the mounting holes are connected with the connecting holes 22 through bolts, so that the mounting angle between the connecting piece 2 and the main journal is adjustable, and further the counterweight assembly 4 is positioned at a position capable of counteracting the deflection of the crankshaft.
Alternatively, the connection member 2 is a flange, which has the advantage of being subjected to high tensile, torsional and shear strengths.
Note that in the description of this specification, a description referring to terms "some embodiments", "other embodiments", and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing description is only of the preferred embodiments of the utility model and the technical principles employed. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.
Claims (10)
1. A balanced structure for bent axle processing, bent axle include main journal, its characterized in that includes:
the two connecting shafts (1) are arranged at intervals, and the axes of the two connecting shafts (1) are collinear;
the two connecting pieces (2), one axial end of each connecting shaft (1) far away from the other connecting shaft (1) is connected with the connecting piece (2), one connecting piece (2) is used for being connected with the main journal at the end part of the crankshaft, the axes of the connecting shafts (1) and the main journal are collinear, and the other connecting piece (2) is used for being clamped on a machine tool;
the two crank arms (3), wherein one axial end of each connecting shaft (1) close to the other connecting shaft (1) is connected with the crank arm (3);
the counterweight component (4) is detachably connected with the two crank arms (3) respectively, and is eccentrically arranged relative to the connecting shaft (1).
2. Balance structure for crankshaft machining according to claim 1, characterized in that the counterweight assembly (4) comprises a plurality of counterweights of the same or different weight, at least one of which counterweights can be selectively connected between two crank arms (3) to achieve weight adjustability of the counterweight assembly (4).
3. Balance structure for crankshaft machining according to claim 2, characterized in that the balancing weight is bolted to the crank arm (3).
4. Balance structure for crankshaft machining according to claim 2, characterized in that both crank arms (3) are provided with a first connecting hole, both connecting pieces (2) are provided with a second connecting hole, both ends of the connecting shaft (1) are respectively in interference fit with the first connecting hole and the second connecting hole.
5. Balance structure for crankshaft machining according to claim 4, characterized in that the connecting shaft (1) comprises two abutment portions (11), the abutment portions (11) being located on the outer circumferential surface of the connecting shaft (1), the crank arms (3) and the connecting piece (2) both abutting against the abutment portions (11).
6. Balance structure for crankshaft machining according to claim 5, characterized in that the abutment (11) extends in the circumferential direction of the connecting shaft (1) and is connected end to end.
7. Balance structure for crankshaft machining according to any of claims 1-6, characterized in that the axial end face of the connecting shaft (1) is provided with a positioning through hole (12) for positioning the crankshaft in the machining position of a machine tool.
8. Balance structure for crankshaft machining according to any one of claims 1 to 6, characterized in that the connecting piece (2) is provided with a third connecting hole (22), the third connecting hole (22) being intended to be connected with the main journal.
9. Balance structure for crankshaft machining according to claim 8, characterized in that said third connecting holes (22) are provided in plurality, a plurality of said third connecting holes (22) being equally spaced along the circumferential edge of said connecting piece (2).
10. Balance structure for crankshaft machining according to any of claims 1-6, characterized in that the connection piece (2) is a flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321016886.XU CN220372771U (en) | 2023-04-28 | 2023-04-28 | Balance structure for crankshaft machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321016886.XU CN220372771U (en) | 2023-04-28 | 2023-04-28 | Balance structure for crankshaft machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220372771U true CN220372771U (en) | 2024-01-23 |
Family
ID=89565285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321016886.XU Active CN220372771U (en) | 2023-04-28 | 2023-04-28 | Balance structure for crankshaft machining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220372771U (en) |
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2023
- 2023-04-28 CN CN202321016886.XU patent/CN220372771U/en active Active
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