CN214837769U - Split type crankshaft - Google Patents

Split type crankshaft Download PDF

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Publication number
CN214837769U
CN214837769U CN202120752808.0U CN202120752808U CN214837769U CN 214837769 U CN214837769 U CN 214837769U CN 202120752808 U CN202120752808 U CN 202120752808U CN 214837769 U CN214837769 U CN 214837769U
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China
Prior art keywords
crankshaft
component
keyway
bent axle
split
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CN202120752808.0U
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Chinese (zh)
Inventor
陈瑞昆
张仕锡
章利好
陈艳闯
肖超炜
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Zhejiang Ruili Air Compressor Equipment Co ltd
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Zhejiang Ruili Air Compressor Equipment Co ltd
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Abstract

The utility model relates to a compressor accessory technical field, in particular to split type bent axle. The utility model discloses a split crankshaft, which comprises a first component, a second component and a radial positioning structure with a key pin, wherein the first component and the second component are detachably connected and form a crankshaft structure; the first component and the second component are radially positioned by a radial positioning structure. Specifically, the first part is preceding bent axle, and the second part is the back bent axle, and preceding bent axle is connected with detachable between the back bent axle, and preceding bent axle sets up first keyway, and the back bent axle sets up the second keyway, and first keyway and second keyway structure are corresponding with the position, and preceding bent axle is connected with the back bent axle, and the dowel can set up in first keyway and second keyway, and the installation space who forms between first keyway and the second keyway promptly can be used to install the dowel. The connecting mode of the key groove and the key pin is adopted to radially fix the front crankshaft and the rear crankshaft, so that the structure is simplified, the operation is reliable, the assembly and disassembly are convenient, the material is easy to obtain, and the cost is saved.

Description

Split type crankshaft
Technical Field
The utility model relates to a compressor accessory technical field, in particular to split type bent axle.
Background
The crankshaft is one of the most important parts in the compressor, and bears the force transmitted by the connecting rod, converts the force into torque output and drives other accessories to work, and in the working process, the crankshaft is subjected to the combined action of centrifugal force of rotating mass, gas inertia force with periodic change and reciprocating inertia force, so that the crankshaft bears bending and twisting load, and therefore, the parts on the crankshaft need to have firm connection relation.
Patent document CN207795515U discloses a split crankshaft of compressor, in which: the split type crankshaft of the compressor comprises a shaft body, an eccentric block and an eccentric shaft, wherein the other end of the shaft body II is detachably connected with the eccentric block, and the other end of the shaft body II is fixedly connected with the eccentric block through threads, a locking sleeve is in threaded connection with the shaft body II and is abutted against the eccentric block, in the scheme, the eccentric block is in threaded connection with the shaft body, the locking sleeve is in threaded connection with the shaft body, and the eccentric block is abutted against the locking sleeve to form radial fixation, namely the axial fixation and the radial fixation of the eccentric block are realized through the three connection modes, and in the operation process of the crankshaft, the joint of the locking sleeve, the eccentric block and the shaft body II is subjected to vibration and impact for a long time, so that the thread screwing of the locking sleeve is loosened, and the threaded connection between the shaft body II and the eccentric block is gradually loosened, that is, after the axial connection is loosened, the radial connection is gradually loosened, so that the radial connection is not firm.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art, the utility model provides a radial connection is more firm split type bent axle.
The utility model discloses a following technical scheme realizes:
a split type crankshaft comprises a first component, a second component and a radial positioning structure with a key pin, wherein the first component and the second component are detachably connected and form a crankshaft structure; the first component and the second component are radially positioned by a radial positioning structure.
Further, the first component is provided with a first keyway, the second component is provided with a second keyway, and the key pin can be arranged in the first keyway and the second keyway.
Furthermore, the first component is provided with a mounting hole, one end of the second component is arranged in the mounting hole, a screw or a bolt is arranged in the positioning hole of the first component in a penetrating manner and is in threaded connection with the second component, and the connection position of the screw or the bolt and the second component is positioned in the mounting hole.
Further, the first key groove is arranged on the wall of the mounting hole.
Further, the first member may be provided with 1 or more weight blocks; alternatively, the second member may be provided with 1 or more weights; alternatively, the first and second parts may be provided with at least 1 weight respectively.
Furthermore, the first component and/or the second component are/is integrally formed with the corresponding balancing weights.
Furthermore, the transition position of the first component and the balancing weight thereof is a first transition position, the transition position of the second component and the balancing weight thereof is a second transition position, and a plurality of heat dissipation holes are arranged at the first transition position and/or the second transition position.
Furthermore, a stress surface for press mounting is arranged on the second component, wherein the stress surface is a plane, and the plane direction of the stress surface is perpendicular to the axial lead of the crankshaft.
Further, the surface of the crankshaft is a surface made by a surface treatment process of liquid carbonitriding.
Compared with the prior art, the utility model has the advantages of:
1. the front crankshaft is detachably connected with the rear crankshaft, the key groove and the key pin are arranged between the front crankshaft and the rear crankshaft, when the front crankshaft is axially connected with the rear crankshaft to be loose, the key pin is still located in the key groove to play a role in radially fixing the front crankshaft and the rear crankshaft, the radial position of the front crankshaft and the radial position of the rear crankshaft are guaranteed to be relatively unchanged, and therefore the connecting strength of radial fixation between the front crankshaft and the rear crankshaft is higher.
Drawings
Fig. 1 is a schematic structural view of a split crankshaft of the present invention;
fig. 2 is an exploded schematic view of the split crankshaft of the present invention;
fig. 3 is a schematic view of the press-fitting of the split crankshaft of the present invention.
Reference numbers in the figures: the structure comprises a rear crankshaft 12, a key pin 13, a stud 14, a flat washer 15, a hexagon nut 16, a front crankshaft 17, a balancing weight 18, a heat dissipation hole 20, a fan 21, a first key groove 22, a mounting hole 23, a second key groove 24, a radial positioning structure 25, a positioning hole 26, a first transition part 27, a second transition part 28, a stress surface 29, a press-fitting tool 30, an end part 31, a mounting space 32, a spare threaded hole 33, a third key groove 34 and a conical hole 35.
Detailed Description
The following non-limiting detailed description of the present invention is provided in connection with the preferred embodiments and accompanying drawings. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1, the split crankshaft of the preferred embodiment of the present invention comprises a first component, a second component and a radial positioning structure 25 with a key pin, wherein the first component and the second component are detachably connected to form a crankshaft structure; the first and second parts are radially positioned by a radial positioning structure 25 therebetween.
Specifically, in this embodiment, the first component is a front crankshaft 17, the second component is a rear crankshaft 12, the front crankshaft 17 is detachably connected to the rear crankshaft 12, the front crankshaft 17 is provided with a first key groove 22, the rear crankshaft 12 is provided with a second key groove 24, the first key groove 22 and the second key groove 24 correspond in structure and position, the front crankshaft 17 is connected to the rear crankshaft 12, and the key pin 13 can be disposed in the first key groove 22 and the second key groove 24, that is, the mounting space 32 formed between the first key groove 22 and the second key groove 24 can be used for mounting the key pin 13, preferably, the first key groove 22 and the second key groove 24 are square grooves, and preferably, the key pin 13 is a flat key pin. The connecting mode of the key groove and the key pin 13 is adopted to radially fix the front crankshaft 17 and the rear crankshaft 12, the connecting mode of 'an eccentric block is in threaded connection with a shaft body, a locking sleeve is in threaded connection with the shaft body, and the eccentric block is abutted against the locking sleeve to form radial fixation' adopted in the prior art is avoided, in the scheme, when the axial connection of the front crankshaft 17 and the rear crankshaft 12 is loosened, the key pin 13 is still positioned in the key groove to radially fix the front crankshaft 17 and the rear crankshaft 12, the scheme replaces the mode of radial fixation through threaded connection in the prior art, the front crankshaft 17 and the rear crankshaft 12 are radially fixed only by adopting the matching of the key pin and the key groove, on one hand, the assembly and disassembly of the key pin and the key groove are more convenient, on the other hand, the matching of the key pin and the key groove ensures that the radial relative position of the front crankshaft 17 and the rear crankshaft 12 is not changed, namely, the radial fixing mode of the scheme is not influenced by the axial fixing mode, the scheme is more reliable in work.
With further reference to fig. 2, the front crankshaft 17 is provided with a mounting hole 23, the first key groove 22 is provided on a hole wall of the mounting hole 23 and communicates with the mounting hole 23, one end of the rear crankshaft 12 is provided in the mounting hole 23, and at the same time, the second key groove 24 is provided in the mounting hole 23 and forms a mounting space 32 for mounting the key pin 13 with the first key groove 22; the front crankshaft 17 is further provided with a positioning hole 26, the positioning hole 26 is communicated with the mounting hole 23, the positioning hole 26 is parallel to the axis of the mounting hole 23, one end, close to the front crankshaft 17, of the rear crankshaft 12 is provided with a threaded hole, a screw or a bolt sequentially penetrates through the positioning hole 26 and the threaded hole of the rear crankshaft 12 and is in threaded connection with the rear crankshaft 12, and the connection position of the screw or the bolt and the threads of the rear crankshaft 12 is located in the mounting hole 23; preferably, one end of the rear crankshaft 12 is fixedly connected with the front crankshaft 17 by a flat washer 15, a hexagon nut 16 and a stud 14, one end of the stud 14 is arranged in the positioning hole 26 in a penetrating manner and is in threaded connection with the rear crankshaft 12, the other end of the stud 14 is screwed with the hexagon nut 16 in a threaded manner, and the flat washer 15 is sleeved on the stud 14 and is arranged between the hexagon nut 16 and the front crankshaft 17 and used for reducing stress concentration at the connection position of the stud 14 and the front crankshaft 17. When the front crankshaft 17 is connected with the rear crankshaft 12, a mode that one end of the rear crankshaft 12 is arranged in the mounting hole 23 is adopted, so that the mounting space is saved; the rear crankshaft 12 and the front crankshaft 17 are in threaded connection to form axial fixation, so that the rear crankshaft 12 and the front crankshaft 17 can be firmly fixed, the fixing mode is simplified, and the processing cost is reduced.
In other alternative embodiments, the first component is in a straight shaft shape, the opening position of the mounting hole 23 of the first component is correspondingly arranged on the straight shaft, the second component is in a crankshaft shape, and the first component and the second component are detachably connected; alternatively, the first member is formed in a crank shape, the opening of the first member mounting hole 23 corresponds to the crank, the second member is formed in a straight shaft shape, and the first member and the second member are detachably connected.
The crankshaft structure further comprises 1 or more balancing weights, specifically, the front crankshaft 17 can be provided with 1 or more balancing weights 18, or the rear crankshaft 12 can be provided with 1 or more balancing weights 18, or the front crankshaft 17 and the rear crankshaft 12 can be respectively provided with at least 1 balancing weight 18; optionally, the cross-sectional shape of the weight 18 is square, fan-shaped or polygonal, preferably fan-shaped; preferably, the front crankshaft 17 and/or the rear crankshaft 12 are/is integrally formed with the corresponding counter weight 18, so that the strength reduction of the joint caused by the split connection is avoided. The setting of balancing weight makes the focus of bent axle and the axial lead collineation of bent axle, and the rotatory inertial force and the moment that produce when can balancing the bent axle structure rotation make bent axle rotatory vibrations littleer, and the operation is more stable.
The transition department of preceding bent axle 17 rather than balancing weight 18 is first transition department 27, and the transition department of back bent axle 12 rather than balancing weight 18 is second transition department 28, and first transition department and/or second transition department set up a plurality of louvres 20, and a plurality of louvres 20 are used for casting or when running preceding bent axle 17 and/or back bent axle 12 and dispel the heat to preceding bent axle 17 and/or back bent axle 12, and optional, the quantity of louvre 20 is 2 ~ 5. Through a plurality of louvres 20 that set up in first transition department and/or second transition department for the compressor when the casting, its transition department has good heat dissipation, produces the gas pocket when avoiding moulding plastics or pouring, has improved the rigidity and the intensity of material, simultaneously, at bent axle operation in-process, because louvre 20's setting, can make the bent axle carry out good heat dissipation, the life of extension bent axle.
Preferably, the surface of any one of the parts of the crankshaft structure is a surface made by a surface treatment process using liquid carbonitriding, such as: the first component is in a straight shaft shape, the second component is in a crankshaft shape, and the surface of the crankshaft shape can be treated by adopting a surface treatment process of liquid carbonitriding. Patent document No. CN91102077.2 discloses a low-cost liquid nitrocarburizing process, which is used for carrying out surface treatment on steel workpieces, so that the steel has the advantages of small deformation, high wear resistance, friction reduction, scratch resistance, corrosion resistance, fatigue performance and the like, and is low in price and small in environmental pollution; this method is prior art and will not be described herein.
With further reference to fig. 3, when other components are mounted on the crankshaft structure, such as the connecting rod assembly, in the prior art, one end of the crankshaft structure is directly abutted to the plane, and the connecting rod assembly to be mounted is directly sleeved and press-mounted on the crankshaft structure, so that once the axis of the connecting rod assembly is not overlapped or parallel to the axis of the crankshaft structure during press-mounting, one side of the crankshaft is stressed and is permanently bent and deformed, and the press-mounting success rate is low. In this embodiment, the rear crankshaft 12 is provided with a stress surface 29 for press mounting, wherein the stress surface 29 is a plane, the plane direction of the stress surface 29 is perpendicular to the axial line of the crankshaft structure, when in press mounting, the stress surface 29 can be abutted by a press mounting tool 30, and the stress surface 29 is a main stress component in the press mounting process, so that even if the axial lines of other components are not overlapped or parallel to the axial line of the crankshaft structure during press mounting, the crankshaft structure can be well prevented from bending deformation caused by uneven stress, and the press mounting efficiency and the product percent of pass are greatly improved.
In addition, one end of the front crankshaft 17, which is far away from the rear crankshaft 12, is an end portion 31, the end portion 31 is of a conical surface structure, the fan 21 is provided with a conical hole 35, the end portion 31 is matched with the outer shape structure of the conical hole 35, the fan 21 and the front crankshaft 17 are connected through matching of the end portion 31 and the conical hole 35, optionally, the end portion 31 is in transition fit with the conical hole 35, and meanwhile, the fan 21 and the front crankshaft 17 are fixed by using screws, so that the fan 21 is installed at one end of the front crankshaft 17. The patent No. CN201620185332.6 discloses the installation position and action principle of the crankshaft fan, and the crankshaft fan 21 is prior art, which is not described herein.
The end of the rear crankshaft 12 away from the front crankshaft 17 is further provided with a third key slot 34 and a spare threaded hole 33 for mounting other components, wherein the third key slot 34 can be used for arranging a key pin when the rear crankshaft 12 is connected with other components, and the spare threaded hole 33 can be used for fixedly connecting the rear crankshaft 12 with other components by screws or bolts.
The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A split crankshaft comprises a first component, a second component and a radial positioning structure with a key pin, wherein the first component and the second component are detachably connected and form a crankshaft structure; the first component and the second component are radially positioned by a radial positioning structure.
2. The split crankshaft of claim 1, wherein the first member defines a first keyway, the second member defines a second keyway, and the key pin is disposed in the first keyway and the second keyway.
3. The split crankshaft according to claim 1 or 2, wherein the first member is provided with a mounting hole, one end of the second member is provided with a mounting hole, a screw or a bolt is arranged in the positioning hole of the first member and is in threaded connection with the second member, and the connection position of the screw or the bolt and the second member is positioned in the mounting hole.
4. The split crankshaft of claim 3, wherein the first key groove is provided on a wall of the mounting hole.
5. The split crankshaft according to claim 1, wherein the first member is provided with 1 or more weights; alternatively, the second member may be provided with 1 or more weights; alternatively, the first and second parts may be provided with at least 1 weight respectively.
6. The split crankshaft of claim 5, wherein the first member and/or the second member are each integrally formed with its corresponding weight.
7. The split type crankshaft according to claim 5, wherein a transition point between the first member and the weight block thereof is a first transition point, a transition point between the second member and the weight block thereof is a second transition point, and a plurality of heat dissipation holes are formed at the first transition point and/or the second transition point.
8. The split crankshaft according to claim 1, wherein the second member is provided with a force-bearing surface for press-fitting, wherein the force-bearing surface is a plane, and the direction of the plane of the force-bearing surface is perpendicular to the axial line of the crankshaft.
9. The split type crankshaft according to any one of claims 1 to 2 and 4 to 8, wherein the surface of the crankshaft is a surface made by a surface treatment process using liquid carbonitriding.
10. The split crankshaft according to claim 3, wherein the surface of the crankshaft is a surface treated by a liquid carbonitriding process.
CN202120752808.0U 2021-04-13 2021-04-13 Split type crankshaft Active CN214837769U (en)

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CN202120752808.0U CN214837769U (en) 2021-04-13 2021-04-13 Split type crankshaft

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Application Number Priority Date Filing Date Title
CN202120752808.0U CN214837769U (en) 2021-04-13 2021-04-13 Split type crankshaft

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CN214837769U true CN214837769U (en) 2021-11-23

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CN202120752808.0U Active CN214837769U (en) 2021-04-13 2021-04-13 Split type crankshaft

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115306679A (en) * 2022-09-06 2022-11-08 珠海格力电器股份有限公司 Crankshaft structure and compressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115306679A (en) * 2022-09-06 2022-11-08 珠海格力电器股份有限公司 Crankshaft structure and compressor

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