CN205937039U - Piston and have its compressor - Google Patents

Abstract

The utility model provides a piston and have its compressor, wherein, the piston includes: the body is provided with the breach in order to dodge the connecting rod on the tip of body, the position corresponding to the breach on the body is provided with the connecting hole, and the body passes through the connecting hole and is connected with the connecting rod. Use the technical scheme of the utility model to solve that the assembly of compressor can't meet the demands among the prior art, compressor performance and the poor problem of uniformity.

Description

Piston and the compressor with it

Technical field

The utility model is related to Compressor Technology field, in particular to a kind of piston and the compressor with it.

Background technology

At present, in existing totally-enclosed reciprocating-piston compressor, the assembling of compressor piston connecting rod and piston pin assemblies Divide two kinds, one kind is using monoblock type connecting rod, as shown in figure 1, monoblock type connecting rod 1 is connected by piston pin 3 with piston 2, with By the reciprocating motion with piston 2 for the motion of bent axle 4, wherein, the structure of piston 2 is as shown in Figure 2.Carry out piston 2 with whole It is necessary to U-type groove 6 is opened on compressor cylinder base 5 during body formula connecting rod 1 assembling, stepped down by U-type groove 6 and realize entirety The assembling of formula connecting rod 1；Another is to use Split connecting rod, need not open up U-type groove.

But the equal existing defects of above two technology, the former using monolithic linkage and the resigning mode opening up U-type groove, due to gas Cylinder seat cylinder holes is high to Geometrical Tolerance Principle, and after additional processing U-type groove, when being finished, cylinder holes both sides discontinuity, leads After causing the cylinder-bore having U-type groove is finished, the not enough problem of precision usually occurs.The latter use Split connecting rod mode although U-type groove need not be opened up stepped down, but Split connecting rod manufacture difficulty itself is big, precision is equally difficult to ensure that.Make existing compression It is poor that the assembling of machine is difficult to satisfaction requirement, compressor performance and uniformity.

Utility model content

The utility model provides a kind of piston and the compressor with it, with solve compressor in prior art assembling no Method meets the problem of requirement, compressor performance and uniformity difference.

According to one side of the present utility model, there is provided a kind of piston, piston includes：Body, the end of body sets It is equipped with breach to avoid connecting rod, the position that body corresponds to breach is provided with connecting hole, body passes through connecting hole with connecting rod even Connect.

Further, body includes matrix section and extension, and matrix section and the setting of extension ladder, to form breach, extend Section is arranged on one end of matrix section, and connecting hole is arranged on extension.

Further, matrix section is cylinder, and cylinder has the blind end being oppositely arranged and openend, and extension is arranged on circle The openend of cylinder.

Further, the outer surface of extension is coplanar with the excircle of matrix section.

Further, the radial section of extension is semi-circular shape, and the radius of extension is identical with the radius of matrix section.

Further, matrix section is more than or equal to 6mm along size L1 of its axial direction.

According to one side of the present utility model, there is provided a kind of compressor, including piston, connecting rod, bent axle and cylinder Seat, piston is the piston of above-mentioned offer.

Further, compressor also includes：Balance weight, is arranged on the end face of bent axle, with limiting rod bent axle axle Displacement on line direction.

Further, piston is the piston of above-mentioned offer, and connecting rod includes stub end and little head end, the stub end of connecting rod and song Axle connects, and the little head end of connecting rod is connected with piston, the cylindrical a diameter of D of the little head end of connecting rod, the center line of the connecting hole of piston To the matrix section of piston, the distance of the end face near extension is L2, wherein, L2-0.5D >=0.5mm.

Further, cylinder block includes the cylinder-bore for installing piston, and piston passes through the little head end of piston pin and connecting rod It is connected, cylinder-bore and piston pin are H along the height difference of cylinder-bore radial direction, and the height value of the little head end of connecting rod is h, its In, H-h >=1.5mm.

Application the technical solution of the utility model, avoids connecting rod by setting breach on the end of piston only, and By setting connecting hole at the radial direction along piston only so that piston is connected with connecting rod, thus carrying out connecting rod and piston During assembling, U-type groove need not be opened up on the cylinder block of compressor such that it is able to ensure the machining accuracy of cylinder block cylinder-bore, enter And disclosure satisfy that the matching requirements of compressor.Simultaneously as after cylinder block cylinder-bore cancels U-type groove, processing can lift cylinder Degree and circularity, the lifting beneficial to compressor performance and conforming raising.

Brief description

The Figure of description constituting the part of the application is used for providing further understanding to of the present utility model, this practicality New schematic description and description is used for explaining the utility model, does not constitute to improper restriction of the present utility model. In the accompanying drawings：

Structural representation when Fig. 1 shows that in prior art, monoblock type connecting rod is assembled with piston；

Fig. 2 shows the structural representation of piston in prior art；

Fig. 3 shows the structural representation after assembling according to moving component in the provided compressor of the utility model embodiment Figure；

Fig. 4 shows the structural representation before assembling with piston according to the connecting rod that the utility model embodiment is provided；

Fig. 5 shows the structural representation after assembling with piston according to the connecting rod that the utility model embodiment is provided；

Fig. 6 shows the structural representation of the piston being provided according to the utility model embodiment；

Fig. 7 shows the backsight structural representation of the piston being provided according to the utility model embodiment；

Fig. 8 shows the structural representation finishing peripheral milling according to the piston that the utility model embodiment is provided.

Wherein, above-mentioned accompanying drawing includes the following drawings mark：

1st, monoblock type connecting rod；2nd, piston；3rd, piston pin；4th, bent axle；5th, cylinder block；6th, U-type groove；10th, body；11st, matrix Section；12nd, extension；12a, connecting hole；13rd, installing hole；20th, connecting rod；30th, bent axle；40th, cylinder block；50th, balance weight；60th, piston Pin；70th, fixing bolt.

Specific embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out Clearly and completely description is it is clear that described embodiment is only a part of embodiment of the utility model rather than whole Embodiment.Description only actually at least one exemplary embodiment is illustrative below, never as to this practicality Any restriction that is new and its applying or use.Based on the embodiment in the utility model, those of ordinary skill in the art are not having There is the every other embodiment being obtained under the premise of making creative work, broadly fall into the scope of the utility model protection.

It should be noted that term used herein above is merely to describe specific embodiment, and it is not intended to restricted root Illustrative embodiments according to the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative It is also intended to including plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag Include " when, it indicates existing characteristics, step, operation, device, assembly and/or combinations thereof.

Unless specifically stated otherwise, the part otherwise illustrating in these embodiments and positioned opposite, the digital table of step Reach formula and numerical value does not limit scope of the present utility model.Simultaneously it should be appreciated that for the ease of description, each shown in accompanying drawing The size of individual part is not to draw according to actual proportionate relationship.For skill known to person of ordinary skill in the relevant Art, method and apparatus may be not discussed in detail, but in the appropriate case, described technology, method and apparatus should be considered to award A part for power specification.In all examples with discussion shown here, any occurrence should be construed as merely example Property, not as restriction.Therefore, the other examples of exemplary embodiment can have different values.It should be noted that：Similar Label and letter in following accompanying drawing represent similar terms, therefore, once being defined in a certain Xiang Yi accompanying drawing, then with Do not need in accompanying drawing afterwards it is further discussed.

It is to be understood that the noun of locality such as " forward and backward, upper and lower, left and right ", " laterally, in description of the present utility model Vertically, vertically the orientation indicated by, level " and " top, bottom " etc. or position relationship are normally based on orientation shown in the drawings or position Put relation, be for only for ease of description the utility model and simplify description, in the case of illustrating on the contrary, these nouns of locality Do not indicate that and imply the device of indication or element must have specific orientation or with specific azimuth configuration and operation, because This is it is not intended that restriction to the utility model protection domain；The noun of locality " inside and outside " refers to respect to each part wheel of itself Wide is inside and outside.

For the ease of description, space relative terms can be used here, such as " ... on ", " ... top ", " in ... upper surface ", " above " etc., for describing as a device shown in the figure or feature and other devices or spy The spatial relation levied.It should be appreciated that space relative terms be intended to comprise except device in figure described by orientation Outside different azimuth in use or operation.For example, if the device in accompanying drawing is squeezed, it is described as " in other devices Part or construction above " or " other devices or construction on " device after will be positioned as " other devices or construction under Side " or " under other devices or construction ".Thus, exemplary term " ... top " can include " ... top " and " in ... lower section " two kinds of orientation.This device can also position (ratating 90 degrees or be in other orientation) by other different modes, and And respective explanations are made to space used herein above description relatively.

Furthermore, it is necessary to explanation, limit parts using the word such as " first ", " second ", it is only for be easy to Corresponding parts are distinguished, such as be there is no Stated otherwise, above-mentioned word does not have particular meaning, therefore it is not intended that to this The restriction of utility model protection scope.

As shown in Figures 3 to 8, a kind of piston by being provided according to the utility model specific embodiment, this piston includes Body 10, the end of body 10 is arranged jagged to avoid connecting rod 20, the position that body 10 corresponds to breach is provided with even Meet hole 12a, body 10 is connected with connecting rod 20 by connecting hole 12a.

Apply this kind of configuration mode, when carrying out connecting rod 20 and being connected with piston only 10, due in piston only 10 Arrange jagged on end, therefore when being together fitted in cylinder block 40 connecting rod 20 with piston only 10, can first pass through Piston only 10 is assembled with connector outside cylinder block 40, then the piston assembling together is put into cylinder block 40 gas In cylinder holes.Then connecting rod 20 is assembled together with bent axle 30, jagged due to arranging on the end of piston only 10, because This, when carrying out monoblock type connecting rod 20 with piston assembling, the connecting rod 20 being set on bent axle can move to work in the horizontal direction In the breach of plug, and it is connected with the body 10 of piston by connecting hole 12a in indentation, there.

This kind of mode due to arrange on piston only 10 jagged to avoid to connecting rod 20, thus avoiding in cylinder U-type groove is opened up on seat 40 install to carry out to monoblock type connecting rod 20 stepping down.The utility model with respect to prior art carry out whole When body formula connecting rod is assembled with piston, for the mode of U-type groove is opened up on cylinder block cylinder-bore, due to avoiding in cylinder block gas Additional processing U-type groove in cylinder holes, thus be not in cylinder-bore both sides unbalance stress when carrying out the finishing of cylinder block cylinder-bore Even, and then improve the machining accuracy of cylinder block cylinder-bore.Accordingly, because this kind of configuration mode does not need on cylinder block 40 Open up U-type groove, therefore, whole section of complete cylinder during the cylinder-bore of cylinder block 40, corresponding to the compressor of the piston of this kind of structure The length of crankshaft crank can accordingly shorten, in order to the assembling of connecting rod.

Specifically, in the utility model, in order to avoid to connecting rod, body 10 can be configured to including matrix section 11 With extension 12, matrix section 11 and extension 12 ladder arrange to form breach, and extension 12 is arranged on one end of matrix section 11, Connecting hole 12a is arranged on extension 12.

Apply this kind of configuration mode, by matrix section 11 and the setting of extension 12 ladder are formed breach, by connecting rod 20 when being assembled with piston only 10, first passes through and is assembled outward piston only 10 and connector in cylinder block 40, then The piston assembling together is put into cylinder block 40 cylinder in the hole.Then connecting rod 20 is assembled together with bent axle 30, due to work The matrix section 11 of plug body 10 and extension 12 ladder are arranged to form breach, therefore, are carrying out monoblock type connecting rod 20 and piston During body 10 assembling, the connecting rod 20 being set on bent axle moves in the breach of piston only 10 in the horizontal direction, and makes connecting rod 20 small ends are concentric with connecting hole 12a.Finally, connecting rod 20 is acted on so that connecting rod 20 is set on connector, and make wrist-pin end of connecting rod Lower end plane move vertically downwards to be placed on the upper surface of extension 12, thus complete connecting rod 20 and piston this The connection of body 10.

Further, in the utility model, matrix section 11 is cylinder, and cylinder has the blind end being oppositely arranged and opening End, extension is arranged on the openend of cylinder.It is provided with installing hole 13 in the cylinder of piston, connecting rod 20 can installed with piston Assembled in hole 13.As shown in Figures 3 to 5, can be from piston pin 60 as connector, connecting rod 20 is filled with piston only 10 Timing, can make the small end of connecting rod 20 be set on piston pin 60, and move vertically downwards, until with piston only 10 Extension 12 contacts.

Specifically, process for convenience, the outer surface of extension 12 can be adapted with the periphery of matrix section 11.Extend The radial section of section 12 is semicircle, and the radius of extension 12 is identical with the radius of matrix section 11, and now, extension 12 is semicircle Cylindricality.When needing piston is carried out peripheral milling processing, as shown in figure 8, can be by two pistons in semi-cylindrical extension 12 symmetrical cooperations are so that the extension 12 of two pistons cooperatively forms a complete cylindrical section, and this two pistons after cooperation The diameter of cylindrical section that formed of extension 12 identical with the diameter of the matrix section 11 of piston only 10.Thus, by two work The complete cylinder processing that plug cooperatively forms jointly is simpler, convenient, ensure that cylindrical precision is not when carrying out mill processing Impacted, thus ensureing the overall performance of piston.

Further, in order to ensure piston when the cylinder in the hole of cylinder block 40 is run, the sealing effectiveness in cylinder compression chamber, As shown in figure 4, matrix section 11 can be set greater than or be equal to 6mm length L1 in axial direction.

In the utility model, in order to ensure cylinder block cylinder-bore machining accuracy, and then disclosure satisfy that the assembling of compressor Require, can be by foregoing piston applications in compressor, as shown in Figures 3 to 5, compressor of the present utility model includes living Plug, connecting rod 20, bent axle 30 and cylinder block 40, wherein, bent axle 30 setting is arranged on cylinder block 40, and piston is little with connecting rod 20 Head end is connected in the cylinder in the hole of cylinder block 40, when compressor action, by the motion of bent axle 30, to carry piston in gas The reciprocating motion of the cylinder in the hole of cylinder seat 40.

Further, for the up and down motion of limiting rod 20, compressor of the present utility model also includes balance weight 50, puts down Weighing apparatus block 50 is arranged on the end face of bent axle 30, with displacement on the axis direction of bent axle 30 for the limiting rod 20.As shown in figure 5, Balance weight 50 is fixedly mounted on the end face of bent axle 30 by fixing bolt 70, and this kind of mode will balance with respect in prior art For block 50 is set in the mode of bent axle 30, reliability is higher, being capable of preferably limiting rod 20 fortune up and down vertically Dynamic.

It is considered to the assembling demand of connecting rod and piston in the utility model, in order to preferably completing connecting rod 20 and living The assembling of plug, as shown in figure 4, connecting rod 20 is configured to including stub end and little head end, the stub end of connecting rod 20 is with bent axle 30 even Connect, the little head end of connecting rod 20 is connected with piston, the cylindrical a diameter of D of the little head end of connecting rod 20, the center of the connecting hole 12a of piston The distance of line end face near extension 12 to the matrix section 11 of piston is L2, wherein, L2-0.5D >=0.5mm.

Further, in the utility model, in order to ensure assembling demand, as shown in figure 4, cylinder block 40 is included for pacifying The cylinder-bore of dress piston, piston is connected with the little head end of connecting rod 20 by piston pin, and cylinder-bore and piston pin 60 are along cylinder-bore The height difference of radial direction is H, and the little head end of connecting rod 20 and the height value of stub end are h, wherein, H-h >=1.5mm.Logical Crossing this kind of configuration mode, when carrying out the assembling of piston and connecting rod 20, it can be avoided that interfering, meeting assembling demand.

Because compressor assembly performance of the present utility model is good, compressor performance and uniformity are high, therefore, in order to improve product The service behaviour of product, can be applied to following product, such as refrigerator, dehumidifier etc., to realize a kind of product of favorable working performance.

In order to be further understood that to the utility model, 3 to Fig. 8 is to compressor of the present utility model below in conjunction with the accompanying drawings Piston be described in detail with connecting rod assembling process.

First, bent axle 30 is arranged in the cylinder-bore vertically of cylinder block 40, bent axle 30 is filled with cylinder block 40 Join after finishing, carry out the assembling of piston and piston pin 60 outside cylinder block 40.Piston pin 60 is arranged on the connection of piston only 10 In the 12a of hole, piston pin 60 can be connected using interference fit with the connected mode of piston or realize two by glue bonding Person is connected.

Then, will be equipped with piston pin 60 piston put into cylinder block 40 horizontally set cylinder in the hole, connecting rod 20 Stub end is set on bent axle 30, and the little head end of connecting rod 20 moves in the breach of piston in the horizontal direction, as shown in figure 4, this When, the little head end of connecting rod 20 is located in the breach of piston, and the center line of the center line of little head end of connecting rod 20 and piston pin 60 Coincide.

Then, after the little head end completing connecting rod 20 is fitted into breach, as shown in figure 5, apply downward to connecting rod 20 Active force, makes connecting rod 20 move downward along vertical direction so that the little head end of connecting rod 20 by piston pin 60 complete with Piston only 10 is in mating connection in installing hole 13, and now, the lower surface of the little head end of connecting rod 20 is located at the extension of piston In section 12.

Finally, after completing the assembling that connecting rod 20 is with piston, so that balance weight 50 is moved downward, until with bent axle 30 Upper end fits, and now, is locked balance weight 50 by fixing bolt 70 to the upper end of crankshaft crank, with limiting rod 20 Upper underdrive.So far, that is, connecting rod 20 and assembling in cylinder block 40 for the piston are completed.

When the bent axle 30 of compressor is rotated about axis, the crank handle turns connecting rod 20 of bent axle 30 is carried out around bent axle 30 center line Move back and forth, connecting rod 20 is connected with piston, thus the motion of connecting rod 20 with piston cylinder block 40 cylinder in the hole past Multiple motion.

The utility model using improve after piston compressor compared with compressor of the prior art, have following several Point advantage.

First, due to breach being arranged on the end of piston only to avoid connecting rod, and by the radial direction along piston only Connecting hole is set at direction so that piston is connected with connecting rod, thus when carrying out connecting rod with piston assembling, need not be in compressor Cylinder block on open up U-type groove such that it is able to ensure the machining accuracy of cylinder block cylinder holes, and then disclosure satisfy that the assembling of compressor Require, improve compressor performance and uniformity simultaneously.

Second, jagged due to arranging on piston only, it is therefore not necessary in piston pin upper shed to be realized by alignment pin Piston pin and the fixation of piston, piston pin of the present utility model and piston adopt side cooperation assembling, and fit system can adopt Interference fit or the mode of glue bonding, simple, convenient.

3rd, piston of the present utility model, when carrying out peripheral milling processing, can be matched occlusion by piston breach Mode is carried out, and ensure that machining accuracy it is ensured that compressor performance.

4th, balance weight of the present utility model is the crank upper end being locked to bent axle by fixing bolt, can be fine The play up and down of ground limiting rod.

The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for this For the technical staff in field, the utility model can have various modifications and variations.All of the present utility model spirit and principle Within, any modification, equivalent substitution and improvement made etc., should be included within protection domain of the present utility model.

Claims (10)

1. a kind of piston is it is characterised in that described piston includes：

Body (10), the end of described body (10) is arranged jagged to avoid connecting rod (20), described body (10) is upper to be corresponded to The position of described breach is provided with connecting hole (12a), described body (10) passes through described connecting hole (12a) and described connecting rod (20) connect.

2. piston according to claim 1 is it is characterised in that described body (10) includes matrix section (11) and extension (12), described matrix section (11) and the setting of described extension (12) ladder are to form described breach, described extension (12) setting In one end of described matrix section (11), described connecting hole (12a) is arranged on described extension (12).

3. it is characterised in that described matrix section (11) is cylinder, described cylinder has phase to piston according to claim 2 Blind end to setting and openend, described extension (12) is arranged on the openend of described cylinder.

4. piston according to claim 3 is it is characterised in that the outer surface of described extension (12) and described matrix section (11) excircle is coplanar.

5. piston according to claim 4 it is characterised in that described extension (12) radial section be semi-circular shape, The radius of described extension (12) is identical with the radius of described matrix section (11).

6. piston according to claim 2 is it is characterised in that described matrix section (11) is big along size L1 of its axial direction In or be equal to 6mm.

7. a kind of compressor, including piston, connecting rod (20), bent axle (30) and cylinder block (40) it is characterised in that described piston Piston any one of claim 1 to 6.

8. compressor according to claim 7 is it is characterised in that described compressor also includes：

Balance weight (50), is arranged on the end face of described bent axle (30), to limit described connecting rod (20) in described bent axle (30) Displacement on axis direction.

9. compressor according to claim 7 is it is characterised in that described piston is any one of claim 2 to 6 Piston, described connecting rod (20) includes stub end and little head end, and the stub end of described connecting rod (20) is connected with described bent axle (30), The little head end of described connecting rod (20) is connected with described piston, the cylindrical a diameter of D of the little head end of described connecting rod (20), described piston Center line to the distance of the upper end face near extension (12) of matrix section (11) of described piston of connecting hole (12a) be L2,

Wherein, L2-0.5D >=0.5mm.

10. compressor according to claim 7 is it is characterised in that described cylinder block (40) is included for installing piston Cylinder-bore, described piston is connected with the little head end of described connecting rod (20) by piston pin (60), described cylinder-bore and described work Plug pin is H along the height difference of cylinder-bore radial direction, and the height value of the little head end of described connecting rod (20) is h, wherein, H-h >= 1.5mm.