CN2265445Y

CN2265445Y - Duplex universal-joint driving mechanism for single screw pump

Info

Publication number: CN2265445Y
Application number: CN 96209514
Authority: CN
Inventors: 乐邦耀; 杨和生
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-05-14
Filing date: 1996-05-14
Publication date: 1997-10-22
Anticipated expiration: 2006-05-14

Abstract

The utility model belongs to the improvement of a universal joint of a screw pump, aiming at overcoming the defect of easy abrasion or inconvenient manufacture and maintenance of the original flat pattern universal structure products. The utility model comprises a U-shaped fork 2 positioned on the opposing heads of a screw rod 9 and a drive shaft 1, a U-shaped fork 7 ob both ends of an intermediate shaft 8, and two cross universal joints for perpendicularly connecting the 2 and the 7. The cross universal joints comprise a rectangular block 5 opened with two pin holes orthogonal with each other but not interconnected with each other, and pins 3 and 6 are respectively penetrated through the pin holes and respectively connected with corresponding circular holes on the U-shaped forks 2 and 7. The utility model has the advantages of wear reducing, simple structure, convenient assembly and convenient maintenance.

Description

The duplex universal transmission mechanism of helical rotor pump

The utility model belongs to the screw pump technology, particularly the universal joint shaft mechanism of helical rotor pump.

The universal shaft coupling that adopts in the existing helical rotor pump mainly contains following two types:

1, single pin type.This structure fractures and can't move or lead to a disaster because of unbalance stress weares and teares easily, and working life is short, promptly need change, and be applicable in the helical rotor pump of small-power, small eccentricity in general about 300～400 hours.

2, the plane is cross.Respectively make U type jaw in the screw rod end relative, a plane universal joint cross is respectively arranged between the prong of jaw, on each universal joint axle head identical needle roller and axle sleeve are housed, fix with circlip with driving shaft.During reality is used, often find also to cause accident easily because of the back-up ring quality problems or because of processing, installation errors, and the cost increase, make, keep in repair all difficulty.Its concrete structure is as " mechanical engineering manual " the 5th volume P28-40 diagram.

The purpose of this utility model is to provide a kind of transmission efficiency height, durable in use, simple and reliable for structure, installation and maintenance universal transmission mechanism easily for helical rotor pump.

The utility model comprises the U type jaw A that lays respectively at screw rod and driving shaft opposed end and the U type jaw B at jack shaft two ends, with two universal joint crosss that A, B jaw mutually orthogonal are connected, be characterized in that this universal joint cross is to have two vertical but not connected pin-and-holes mutually on the square type piece, two pins run through this pin-and-hole and are connected with circular hole on U type jaw A, the B respectively, constitute duplex universal joint shaft structure.Be inlaid with bearing or axle sleeve between above-mentioned pin and jaw A, the B, make between jaw and the square type piece and rotate flexibly.

The utility model is owing to adopted double-pin nail non-planar surface universal joint cross structure, and more single pin feature stress is even, and transmission efficiency and working life improve greatly.According to test, after turning round 3300 hours continuously, tear machine check open, still rotate flexibly at the universal joint position, and wearing and tearing are normal.And than the cross structure in plane, cost reduces about 1/3, and installation time can shorten half.Easy to maintenance, especially in use reliability improves greatly, and the helical rotor pump of large and small power and large and small off-centre all can use.

In the accompanying drawing, Fig. 1 is the lateral cross section diagrammatic sketch of non-planar surface universal joint cross square type piece, and Fig. 2 is the longitudinal cross-section diagrammatic sketch of Fig. 1, and Fig. 3 is a structural representation of the present utility model.

Be described further below in conjunction with embodiment and accompanying drawing.

U type jaw 2 is made in driving shaft 1 termination, and its prong position has corresponding circular hole, and circular hole is embedded with axle sleeve 4.Square type piece has two mutual two vertical but not connected pin-and-holes.Pin 3 passes a pin-and-hole in the square type piece 5 by axle sleeve 4, and U type jaw 2 is linked by another quadrature pin-and-hole on pin 6 and the square type piece 5.Jack shaft 8 the other ends are identical with connecting structure and aforesaid way between the driven shaft (screw rod) 9, thereby constitute the duplex universal transmission mechanism, are mainly used in the mechanical device that driving shaft and driven shaft have off-centre, such as screw pump.

Claims

1, a kind of duplex universal transmission mechanism of helical rotor pump, comprise the U type jaw (2) that lays respectively at screw rod (9) and driving shaft (1) opposed end, and the U type jaw (7) at jack shaft (8) two ends, with two universal joint crosss that jaw (2), (7) mutually orthogonal are connected, it is characterized in that this universal joint cross is to have mutually two vertical but not connected pin-and-holes on the square type piece (5), pin (3), (6) run through respectively this pin-and-hole and respectively with U type jaw (2), (7) on corresponding circular hole be connected.

2, duplex universal transmission mechanism as claimed in claim 1 is characterized in that being inlaid with axle sleeve (4) between pin (3), (6) and U type jaw (2), (7).