CN205135946U - Bent axle subassembly and have its compressor - Google Patents

Abstract

The utility model discloses a bent axle subassembly and have its compressor, wherein the bent axle subassembly includes: eccentric shaft and balancing piece, eccentric shaft include first shaft part and second shaft part, and the second shaft part is connected on the axle head face of first shaft part, and the cross section of second shaft part forms to non -circular, is formed with the mounting hole that runs through on the balancing piece, and the cross section of mounting hole forms non -circular for the shape of cross section looks adaptation with the second shaft part, and the balancing piece is joined in marriage on the second shaft part through mounting hole interference cover. According to the utility model discloses a bent axle subassembly because the cross section of second shaft part forms to non -circular, the mounting hole form for the shape of cross section with the second shaft part the same non -circular to second shaft part and mounting hole interference fit, thus at the in -process that the balancing piece was installed, be convenient for carry out axial, circumference and radical location so that the installation just can prevent that the balancing piece from rocking on the bent axle to the balancing piece, guarantee balancing piece and the crankshaft's reliability, thus the reliability of assurance compressor work.

Description

Crankshaft group and there is its compressor

Technical field

The utility model relates to Compressor Technology field, especially relates to a kind of crankshaft group and has its compressor.

Background technique

Point out in correlation technique, the maximum feature of frequency-changeable compressor is exactly the variable speed of motor, general range about 1200 ~ 4500 revs/min, the slow-speed of revolution effectively can reduce power and the running noise of refrigerator, improves efficiency and comfort level, but along with the reduction of rotating speed, eccentric compression portion running inertia lowers, the pressure change of cylinder cycle can not be overcome well, cause compressor body vibration to worsen, bring the series of problems such as refrigerator overall resonance, pipeline resonance.

Current refrigerator compressor producer is generally more is used in the amount of unbalance that the mode of eccentric shaft assembling equilibrium block reduces eccentric part further, this Improving Measurements successful, and particularly when the slow-speed of revolution, vibration can be well controlled.And existing mounting type generally adopts and is directly fixed on the external diameter of eccentric shaft by equilibrium block, but axial, the radial position controlling equilibrium block is very complicated, need make special assembly tooling or detect by an unaided eye, the necessary a sleight of hand of operator, efficiency of assembling is low and location controls situation not in place.

Model utility content

The utility model is intended at least to solve one of technical problem existed in prior art.For this reason, the utility model is to propose a kind of crankshaft group, and described crankshaft group has structure advantage simple, easy for installation.

The utility model also proposes a kind of compressor with above-mentioned crankshaft group.

According to the crankshaft group of the utility model first aspect, comprising: eccentric shaft, described eccentric shaft comprises the first shaft part and the second shaft part, and described second shaft part is connected in the axial end of described first shaft part, and the cross section of described second shaft part is formed as non-circular; Equilibrium block, described equilibrium block is formed with the mounting hole run through, and the cross section of described mounting hole is formed as suitable non-circular with the shape of cross section of described second shaft part, and described equilibrium block is fitted on described second shaft part by described mounting hole interference cover.

According to the crankshaft group of the utility model embodiment, because the cross section of the second shaft part of bent axle is formed as non-circular, simultaneously the mounting hole of equilibrium block is formed as identical with the shape of cross section of the second shaft part non-circular, and the second shaft part and mounting hole interference fit, thus in the process of equilibrium block installation, be convenient to carry out axial, circumferential and radial location to equilibrium block, thus be convenient to install, and can prevent equilibrium block from rocking on bent axle, ensure the reliability that equilibrium block is connected with bent axle, thus ensure the reliability of compressor operating.

According to embodiments more of the present utility model, the periphery wall of described second shaft part comprises: spacing wall portion, and described spacing wall portion was rotated for limiting described equilibrium block with described mounting hole spacing cooperation; With cooperation wall portion, described cooperation wall portion and described mounting hole interference fit are with fixing described equilibrium block.

In embodiments more of the present utility model, described cooperation wall portion is formed as arc surface, the periphery wall of described first shaft part is formed as cylndrical surface, axially just right at described eccentric shaft of the radius of described arc surface and the profile line of the profile line of described arc surface and described cylndrical surface identical with the radius of described cylndrical surface.

In embodiments more of the present utility model, the cross section of described second shaft part is formed as having the arc of major arc.

In embodiments more of the present utility model, described first shaft part and described second shaft part one-body molded.

In embodiments more of the present utility model, described mounting hole coordinates with described spacing wall portion gap limit.

In embodiments more of the present utility model, described spacing wall portion is formed as the combination of plane or curved surface or plane and curved surface.

According to embodiments more of the present utility model, the axial end of described first shaft part of vicinity of described equilibrium block is only against in the described axial end of described first shaft part.

According to embodiments more of the present utility model, the edge of the axial end away from described first shaft part of described second shaft part is formed with the guide surface for importing described mounting hole.

According to the compressor of the utility model second aspect embodiment, comprise the crankshaft group according to the utility model first aspect embodiment.

According to the compressor of the utility model embodiment, by arranging the crankshaft group according to the utility model first aspect embodiment, the reliability of compressor operating can be improved.

Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of the crankshaft group according to the utility model embodiment;

Fig. 2 is the explosive view of the crankshaft group shown in Fig. 1;

Fig. 3 is the sectional drawing of the crankshaft group shown in Fig. 1;

Fig. 4 is the structural representation of the eccentric shaft shown in Fig. 2 etc.;

Fig. 5 is the structural representation of the equilibrium block shown in Fig. 2.

Reference character:

Crankshaft group 100,

Eccentric shaft 1, the first shaft part 11, second shaft part 12, spacing wall portion 121, coordinates wall portion 122, guide surface 123,

Equilibrium block 2, mounting hole 21.

Embodiment

Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.

Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present utility model.Of the present utility model open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the utility model.In addition, the utility model can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the utility model provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.

The crankshaft group 100 according to the utility model first aspect embodiment is described in detail below with reference to Fig. 1-Fig. 5.

As depicted in figs. 1 and 2, according to the crankshaft group 100 of the utility model first aspect embodiment, comprising: eccentric shaft 1 and equilibrium block 2.

Specifically, eccentric shaft 1 comprises the first shaft part 11 and the second shaft part 12, second shaft part 12 is connected in the axial end of the first shaft part 11, the cross section of the second shaft part 12 is formed as non-circular, equilibrium block 2 is formed with the mounting hole 21 run through, the cross section of mounting hole 21 is formed as suitable non-circular with the shape of cross section of the second shaft part 12, equilibrium block 2 fits on the second shaft part 12 by mounting hole 21 interference cover, axis can be carried out thus to equilibrium block 2, circumference and radial location, prevent equilibrium block 2 from rotating on eccentric shaft 1, thus can equilibrium block 2 be installed on eccentric shaft 1 rapidly and accurately, and ensure the reliability that equilibrium block 2 is connected with eccentric shaft 1.

According to the crankshaft group 100 of the utility model embodiment, because the cross section of the second shaft part 12 of bent axle is formed as non-circular, simultaneously the mounting hole 21 of equilibrium block 2 is formed as identical with the shape of cross section of the second shaft part 12 non-circular, and the second shaft part 12 and mounting hole 21 interference fit, thus in the process of equilibrium block 2 installation, be convenient to carry out axis to equilibrium block 2, circumference and radial location, thus be convenient to install, and can prevent equilibrium block 2 from rocking on bent axle, ensure the reliability that equilibrium block 2 is connected with bent axle, thus ensure the reliability of crankshaft group 100, and then ensure the reliability of compressor operating.

In embodiments more of the present utility model, with reference to Fig. 2 and Fig. 4, the periphery wall of the second shaft part 12 comprises spacing wall portion 121 and coordinates wall portion 122, spacing wall portion 121 was rotated for limiting balance block 2 with mounting hole 21 spacing cooperation, coordinated wall portion 122 and mounting hole 21 interference fit with stable equilibrium block 2.Can to carry out circumference to equilibrium block 2 spacing for spacing wall portion 121 thus, coordinate that wall portion 122 can be carried out axially equilibrium block 2, circumference is spacing with radial direction and the reliability that equilibrium block 2 is connected with the second shaft part 12 of eccentric shaft 1 can be increased, and then the reliability of raising compressor.

Here, it should be noted that, in the related, exist and equilibrium block gap is set on eccentric shaft, then adopt screw equilibrium block to be positioned at technological scheme on eccentric shaft, but, the component of this kind of technological scheme needs are more, and assembling is complicated, and the crankshaft group 100 of the application by comparison, there is Assembly part few, the advantages such as assembly process is simple.

Further, with reference to Fig. 4, coordinate wall portion 122 to be formed as arc surface, the periphery wall of the first shaft part 11 is formed as cylndrical surface, and the radius of arc surface is identical with the radius of cylndrical surface, and axially just right at eccentric shaft 1 of the profile line of the profile line of arc surface and cylndrical surface.That is, cylndrical surface can extend along the axial direction of eccentric shaft 1 towards the direction of the second shaft part 12, and arc surface overlaps with the extended surface of cylndrical surface.Thus, in the process of processing eccentric shaft 1, can along the axial direction of cylinder cutting the arc stripping and slicing of next minor arc on a side end face of a cylinder, thus can simplified structure and processing technology, save the manufacture cycle, reduction cost of production.

Alternatively, with reference to Fig. 4, the first shaft part 11 and one-body molded structure and the processing technology that can simplify eccentric shaft 1 of the second shaft part 12, the first shaft part 11 and the second shaft part 12 are without the need to assembling simultaneously, can save the manufacture cycle, reduce cost of production.Certainly, the utility model is not limited thereto, and the first shaft part 11 and the second shaft part 12 can be processed separately, then is assembled by techniques such as welding, be threaded.

In embodiments more of the present utility model, with reference to Fig. 4, the cross section of the second shaft part 12 is formed as having the arc of major arc.That is, the cross section of the second shaft part 12 is formed as arc, and arc corresponding circular arc is major arc.It should be noted that, " major arc " refers to that right central angle is greater than the circular arc of 180 °.The arc surface that spacing wall portion 121 can be made thus to be formed is greater than the half of corresponding cylndrical surface, the radial position-limiting action of spacing wall portion 121 pairs of equilibrium blocks 2 can be realized thus, increase the inner hole wall of the mounting hole 21 of equilibrium block 2 and the reliability coordinating and be connected between spacing wall portion 121 simultaneously, thus improve the reliability of compressor operating.

In embodiments more of the present utility model, with reference to Fig. 3, mounting hole 21 coordinates with spacing wall portion 121 gap limit.Be convenient to assembling thus, more and cause interference owing to associating size when preventing equilibrium block 2 from installing with the first shaft part 11, thus raising efficiency of assembling.Alternatively, spacing wall portion 121 is formed as the combination of plane or curved surface or plane and curved surface.That is, spacing wall portion 121 can be formed as plane, and correspondingly, the side coordinated with spacing wall portion 121 of mounting hole 21 is formed as plane; Spacing wall portion 121 can also be formed as curved surface, and correspondingly, the side coordinated with spacing wall portion 121 of mounting hole 21 is formed as curved surface; Spacing wall portion 121 can also be formed as the combination of plane and curved surface, and correspondingly, the side coordinated with spacing wall portion 121 of mounting hole 21 is formed as the combination of plane and curved surface.The diversity of the structure of spacing wall portion 121 can be increased thus, thus the diversity that increase eccentric shaft 1 is connected with equilibrium block 2, the shape of suitable spacing wall portion 121 can be selected according to assembling demand.

In embodiments more of the present utility model, with reference to Fig. 3, the axial end (lower end surface of equilibrium block 2 as shown in Figure 3) of vicinity first shaft part 11 of equilibrium block 2 is only against in the axial end (upper-end surface of the first shaft part 11 as shown in Figure 3) of the first shaft part 11.Axial limiting further can be carried out to equilibrium block 2 thus, prevent equilibrium block 2 from jumping on the axial direction of eccentric shaft 1, thus improve the reliability of the connection of equilibrium block 2 and eccentric shaft 1, thus improve the reliability of the work of compressor.

Alternatively, with reference to Fig. 4, the edge of the axial end away from the first shaft part 11 (upper-end surface of the second shaft part as shown in Figure 4) of the second shaft part 12 is formed with the guide surface 123 for importing mounting hole 21, and such as guide surface 123 can be configured to chamfering inclined-plane.Due to the existence of chamfering, the diameter of axle of the upper-end surface of the second shaft part 12 is less than the diameter of axle (aperture of the mounting hole 21 namely coordinated with the second shaft part 12) of the shaft part that the second shaft part 12 coordinates with the mounting hole 21 of equilibrium block 2, in the installation process of equilibrium block 2, the upper-end surface of the second shaft part 12 is first through mounting hole 21, the diameter of axle due to the upper-end surface of the second shaft part 12 is less than the aperture of mounting hole 21, so, second shaft part 12 more easily penetrates in the mounting hole 21 of equilibrium block 2, and the effect of guiding is played in the installation of chamfering to equilibrium block 2 and the second shaft part 12.Be formed with guide surface 123 at the top edge of the second shaft part 12 to be thus convenient to the second shaft part 12 to be installed in the mounting hole 21 of equilibrium block 2 quickly and accurately, improve efficiency of assembling.

Briefly describe the crankshaft group 100 according to the utility model specific embodiment below with reference to Fig. 1-Fig. 5, following description is exemplary, is intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.

As Figure 1-Figure 5, according to the crankshaft group 100 of the utility model embodiment, comprise eccentric shaft 1 and equilibrium block 2.Wherein, eccentric shaft 1 comprises integrated first shaft part 11 and the second shaft part 12, second shaft part 12 is connected in the axial end of the first shaft part 11, the cross section of the second shaft part 12 is formed as having the arc of major arc, equilibrium block 2 is formed with the mounting hole 21 run through, the cross section of mounting hole 21 is identical with the shape of the cross section of the second shaft part 12, the mounting hole 21 of equilibrium block 2 and the second shaft part 12 interference fit.

The periphery wall of the second shaft part 12 comprises spacing wall portion 121 and coordinates wall portion 122, spacing wall portion 121 is formed as plane and coordinates with mounting hole 21 gap limit rotating for limiting balance block 2, gap between spacing wall portion 121 and mounting hole 21 is A (as shown in Figure 3), A can be greater than 0 or equal 0, is convenient to assembling thus.Coordinate wall portion 122 to be formed as arc surface, the periphery wall of the first shaft part 11 is formed as cylndrical surface, axially just right at eccentric shaft 1 of the radius of arc surface and the profile line of the profile line of arc surface and cylndrical surface identical with the radius of cylndrical surface.That is, arc surface is the extension of partial cylindrical surface on the axial direction of eccentric shaft 1.Thus can simplified structure and processing technology, save the manufacture cycle, reduce cost of production.

When equilibrium block 2 is installed on eccentric shaft 1, the inner hole wall of mounting hole 21 coordinates with the periphery wall of the second shaft part 12, and the lower end surface of equilibrium block 2 is only against on the upper-end surface of the first shaft part 11.Can carry out circumference, axis and radial direction to equilibrium block 2 thus carries out spacing, prevents equilibrium block 2 from rocking in the rotation process of eccentric shaft 1, thus the cooperation ensureing equilibrium block 2 and eccentric shaft 1 and the reliability be connected, and then the reliability of guarantee compressor operating.When equilibrium block 2 assembles, radial direction only has a position to put into, as long as axially the lower end surface of equilibrium block 2 is only arrived to the upper-end surface of the first shaft part 11, whether operator assembles not in place without the need to paying close attention to equilibrium block 2, lifting operation efficiency.

According to the crankshaft group 100 of the utility model embodiment, by economic, reliable structural design, effectively overcome eccentric shaft 1 and equilibrium block 2 assembles Problems existing, can fast, accurately, reliably carry out the assembling of equilibrium block 2, promote efficiency of assembling, and because equilibrium block 2 is simple with the structure of eccentric shaft 1, without the need to dropping into special assembly tooling again, economic benefit clearly.

The compressor according to the utility model second aspect embodiment is described in detail below with reference to Fig. 1-Fig. 5.

According to the compressor of the utility model second aspect embodiment, comprise the crankshaft group 100 according to the utility model first aspect embodiment.It should be noted that, the structure of compressor and working principle thereof should be well known to those skilled in the art, and no longer describe in detail here.

According to the compressor of the utility model embodiment, by arranging the crankshaft group 100 according to the utility model first aspect embodiment, the reliability of the work of compressor can be improved.

In description of the present utility model, it will be appreciated that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, " interior ", " outward ", " axis ", " radial direction ", " circumference " they be based on orientation shown in the drawings or position relationship; be only the utility model and simplified characterization for convenience of description; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.

In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In description of the present utility model, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.

In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; It can be mechanical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.

In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.

In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.

Although illustrate and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and aim, scope of the present utility model is by claim and equivalents thereof.

Claims (10)

1. a crankshaft group, is characterized in that, comprising:

Eccentric shaft, described eccentric shaft comprises the first shaft part and the second shaft part, and described second shaft part is connected in the axial end of described first shaft part, and the cross section of described second shaft part is formed as non-circular;

Equilibrium block, described equilibrium block is formed with the mounting hole run through, and the cross section of described mounting hole is formed as suitable non-circular with the shape of cross section of described second shaft part, and described equilibrium block is fitted on described second shaft part by described mounting hole interference cover.

2. crankshaft group according to claim 1, is characterized in that, the periphery wall of described second shaft part comprises:

Spacing wall portion, described spacing wall portion was rotated for limiting described equilibrium block with described mounting hole spacing cooperation; With

Coordinate wall portion, described cooperation wall portion and described mounting hole interference fit are with fixing described equilibrium block.

3. crankshaft group according to claim 2, it is characterized in that, described cooperation wall portion is formed as arc surface, the periphery wall of described first shaft part is formed as cylndrical surface, axially just right at described eccentric shaft of the radius of described arc surface and the profile line of the profile line of described arc surface and described cylndrical surface identical with the radius of described cylndrical surface.

4. the crankshaft group according to any one of claim 1-3, is characterized in that, the cross section of described second shaft part is formed as having the arc of major arc.

5. crankshaft group according to claim 3, is characterized in that, described first shaft part and described second shaft part one-body molded.

6. crankshaft group according to claim 2, is characterized in that, described mounting hole coordinates with described spacing wall portion gap limit.

7. crankshaft group according to claim 2, is characterized in that, described spacing wall portion is formed as the combination of plane or curved surface or plane and curved surface.

8. crankshaft group according to claim 1, is characterized in that, the axial end of described first shaft part of vicinity of described equilibrium block is only against in the described axial end of described first shaft part.

9. crankshaft group according to claim 1, is characterized in that, the edge of the axial end away from described first shaft part of described second shaft part is formed with the guide surface for importing described mounting hole.

10. a compressor, is characterized in that, comprises the crankshaft group according to any one of claim 1-9.