CN201180642Y

CN201180642Y - Piston link assembly of refrigerator compressor

Info

Publication number: CN201180642Y
Application number: CNU2008200846602U
Authority: CN
Inventors: 孔载明
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-03-26
Filing date: 2008-03-26
Publication date: 2009-01-14
Anticipated expiration: 2018-03-26

Abstract

The utility model relates to a piston-rod assembly for a refrigerator compressor, which has the advantages of easy fabrication and no risk of blockage or locking of the piston. The piston-rod assembly comprises a connecting rod and a piston connected with the connecting rod, and is characterized in that the front end of the connecting rod (1) is processed to a spherical body (11); a spherical tile (3) is arranged at the back half part of the spherical body and coincides with the spherical body; a chamber (43) is formed on the piston (4) to accommodate the spherical body of the connecting rod and coincides with the front half part of the spherical body; the rearward part of the chamber extends in the radial direction to form a tile-accommodating chamber (42) for accommodating the spherical tile; and a connecting fixed piece is arranged to allow the spherical tile to be fixed to the piston (4). The piston-rod assembly is suitable for refrigerator compressors.

Description

The freezer compressor piston rod part

Technical field

The utility model relates to piston rod part, particularly the piston rod part of freezer compressor.

Background technique

Freezer compressor is through the bent axle drivening rod, and the piston that connecting rod drives in the cylinder body again moves back and forth, and realizes compression effectiveness; Owing to drive through bent axle, do oscillating motion in the time of the connecting rod displacement.The piston rod part of freezer compressor such as Fig. 1 in the prior art, shown in Figure 2, bent axle d and connecting rod c outer end pivot connect, connecting rod c the inner is connected with piston a through bearing pin b, connecting rod c is that the axle center is at in-plane reciprocally swinging one angle beta vertical with bearing pin with bearing pin b during motion, driving piston a simultaneously moves back and forth, and connecting rod c is at the in-plane parallel with bearing pin b and remove described out-of-plane other direction vertical with bearing pin and can't fill and permitted a bit swing, otherwise the piston motion meeting is obstructed and is stuck even, this just requires the angle α of bent axle and connecting rod to remain absolute right angle, and remain the right angle in the course of the work, so very high to the requirement on machining accuracy of associated workpiece, difficulty of processing is very big; If the workpiece processing precision reduces a little, fill perhaps that the direction of connecting rod the in-plane vertical with bearing pin outside has small sway, then to make between piston and cylinder body to have certain interval, the air turnover will be arranged like this, reduction compressor effect.

Summary of the invention

The utility model will solve the freezer compressor connecting rod and be connected existing workpiece processing difficulty height with piston through bearing pin, the problem that piston motion is obstructed easily, freezer compressor piston rod part of the present utility model is provided for this reason, this assembly can reduce the requirement of bent axle and connecting rod angle precision, make associated workpiece processing relatively easy, and piston does not exist and is obstructed or stuck problem.

For addressing the above problem, the technical solution adopted in the utility model comprises connecting rod and the piston that links to each other with connecting rod, its special way is its front end making and settlement becoming spheroid of connecting rod, be provided with the ball that is fit to described spheroid latter half part that cooperates with described spheroid watt, offer spheroid that can accommodate described connecting rod and the cavity that coincide with this spheroid front half part on the piston, the inclined to one side rear of described cavity radially extends out watt chamber of putting that formation can accommodate described ball watt, is provided with the part that is connected and fixed that can make described ball watt be fixed in piston.

The utility model can offer the jump ring groove that radially extends out at watt place, outdoor of putting of the above cavity of piston, the described part that is connected and fixed that can make ball watt be fixed in piston is the jump ring that is placed in described jump ring groove, thereby the spheroid of working as described connecting rod front end accommodates the cavity in piston, described ball watt accommodates putting watt chamber and being fit to the latter half part of the spheroid of connecting rod in the inclined to one side rear of cavity, described jump ring accommodates when the jump ring groove, the ball that can make the spheroid of connecting rod and be fit to this spheroid latter half part watt is positioned piston, can not withdraw from, and connecting rod can be swung with respect to piston in any direction; When taking off jump ring, ball watt and connecting rod can withdraw from piston.

Material is also saved in processing for convenience, and described ball watt can be made through punching press by two respective metal sheet; Certainly, described ball watt also can process through turning with metallic material.

Described ball watt should be made up of two half blocks circumferentially dividing equally, and the spheroid latter half part of ball watt inner face and connecting rod coincide, and ball watt rear shape is the flange dish type.

The utility model becomes spheroid because the connecting rod front end makes, and be provided with ball watt, offer the cavity that can accommodate described spheroid in the piston and accommodate watt chamber of putting of described ball watt, also be provided with the part that is connected and fixed that can make ball watt be fixed in piston, after so the connecting rod in the utility model connects piston, connecting rod can be swung in any direction, rather than can only swing as prior art in a direction, like this, even 90 ° situation appears deviating from the angle that bent axle and connecting rod pivot connect,, still can make piston back and forth translational motion neatly in cylinder body because connecting rod can be done any direction swing, will not occur being obstructed or stuck situation, can make freezer compressor reliable operation all the time.

Description of drawings

Fig. 1 is freezer compressor piston, connecting rod and the bent axle composite structure schematic representation of prior art;

Fig. 2 is the schematic top plan view that Fig. 1 comprises piston, connecting rod;

Fig. 3 is the utility model assembling back structural representation;

Fig. 4 is the bar linkage structure schematic representation in the utility model;

Fig. 5 is the piston structure schematic representation in the utility model;

Fig. 6 is a kind of ball watt profile planimetric map in the utility model;

Fig. 7 is Fig. 6 A-A sectional view.

Be labeled as among the figure: a piston, b bearing pin, c connecting rod, d bent axle, α bent axle and connecting rod angle, β angle of connecting rod, 1 connecting rod, 2 jump rings, 3 balls watt, 4 pistons, 41 jump ring grooves, 42 balls watt chamber, 43 cavitys.

Embodiment

The freezer compressor piston rod part, connecting rod 1 its front end makes and becomes a spheroid 11, rod rear end is the end cover that connects with the bent axle pivot, be provided with the ball of making through punching press by two respective metal sheet that is fit to described spheroid latter half part that cooperates with described spheroid watts 3, offer spheroid that accommodates described connecting rod and the cavity 43 that coincide with this spheroid front half part on the piston 4, what the inclined to one side rear of this cavity extended out radially that formation can accommodate described ball watt puts watt chamber 42, put a watt place, outdoor and offer the jump ring groove 41 that radially extends out, be provided with the jump ring 2 that accommodates in the jump ring groove.

Claims

1, freezer compressor piston rod part, comprise connecting rod and the piston that links to each other with connecting rod, it is characterized in that its front end making and settlement becoming spheroid (11) of connecting rod (1), be provided with the ball that is fit to described spheroid latter half part watt (3) that cooperates with described spheroid, offer spheroid that can accommodate described connecting rod and the cavity (43) that coincide with this spheroid front half part on the piston (4), what the inclined to one side rear of described cavity extended out radially that formation can accommodate described ball watt puts a watt chamber (42), is provided with the part that is connected and fixed that can make described ball watt be fixed in piston (4).

2, freezer compressor piston rod part as claimed in claim 1, it is characterized in that offering the jump ring groove (41) that radially extends out at the place, watt outdoor of putting of the above cavity of piston (4), the described part that is connected and fixed that can make ball watt be fixed in piston is the jump ring (2) that is placed in described jump ring groove.

3, freezer compressor piston rod part as claimed in claim 1 or 2 is characterized in that punching type ball that described ball watt made through punching press by two respective metal sheet watt.