CN2797713Y

CN2797713Y - Static balance tilt cylinder type hydraulic motor

Info

Publication number: CN2797713Y
Application number: CN 200520102562
Authority: CN
Inventors: 尤新荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-05-26
Filing date: 2005-05-26
Publication date: 2006-07-19
Anticipated expiration: 2015-05-26

Abstract

The utility model relates to a static balance tilt cylinder type hydraulic motor which comprises an oil through disc, an oil distributing disc, a casing, a plunger cover connected with the casing and a front cover. Both ends of a crank shaft are supported by a bearing. The oil distributing disc is connected with the crank shaft through a cross shaft, and the oil distributing disc and the crank shaft synchronously rotate. The circumference of a cylinder body is averagely provided with odd plunger cylinders, and the inner part of the plunger cylinder is connected with a plunger body which contacts a bearing sleeve sheathed on the crank shaft. The plunger body slides from top to bottom along the inner part of a central through hole of a ball pivot which is composed of a ball head and a ball surface seat. The end part of the plunger body can also penetrate through the central through hole to an inner cavity of the plunger cover. The plunger body is divided into an upper cavity and a lower cavity by a damping hole, wherein the hydraulic acting surface of the lower cavity is smaller than that of the upper cavity, and the hydraulic acting surface of the lower cavity is 55-99% of the hydraulic acting surface of the upper cavity. The ball surface seat is fixed in the inner cavity of the plunger cylinder. The ball surface seat holds the ball head and is matched with the ball head. The supporting force of the plunger body which is used as an energy conversion kernel part is balanced. The supporting force of the ball pivot is little. The efficiency and the reliability of a product are improved, the service life is extended, the structure is simple, the number of parts is reduced, the fabrication is easy and the cost and the noise are reduced.

Description

Static balance tilt cylinder type hydraulic motor

Technical field

The utility model relates to a kind of oil hydraulic motor, especially refers to a kind of static balance tilt cylinder type hydraulic motor.

Background technique

Traditional oil hydraulic motor adopts the crankshaft connecting rod type structure, being provided with ball-and-socket in the middle of the plunger in the cylinder is connected with connection rod sphere, the eccentric face of bent axle is close in the cylinder bottom surface of connecting rod, bent axle is supported by bearing, bearing fixing is in housing and capping, one end of bent axle links to each other with oil distribution casing by cross axle, the other end links to each other with load, when high-pressure and hydraulic oil by logical food tray through oil distribution casing, the action of hydraulic force that hydraulic oil produced when housing entered plunger case is at plunger head, be passed on the eccentric wheel by connecting rod, connecting rod stressed tangential force that drives crankshaft rotating and the radial force of bearing of being decomposed into by bearing, its reaction force is by hydraulic coupling on the plunger and lateral force institute balance that the plunger case inwall is produced.Tangential force drives crankshaft rotating, but because existence is to the lateral force of plunger case inwall, make the vital part friction pair stressed big, the strength of materials, part processing are required high, therefore cause the product cost height, efficient is low, working pressure is low, the life-span is short, poor reliability.

The patent No. is CN01245640.3 " a novel spheroid tilt cylinder type hydraulic motor ", though adopt the spheroid tilt cylinder of universal rotation to replace crankshaft rod structure, the action of hydraulic force that produces in hydraulic oil enters the spheroid cylinder is to plunger the time, because plunger is swung with spheroid, the direction of hydraulic coupling is pointed to the center of crankshaft eccentric, has avoided the spheroid inside wall of cylinder is produced lateral force.But still have some defectives: (1), spheroid cylinder are complex-shaped, the processing request height, spheroid cylinder inner chamber is equipped with plunger, carrying the hydraulic action same when leading to high pressure oil with plunger, thereby the strength of materials is required high, and plunger has the stroke of twice crankshaft eccentric distance, thereby causes the volume of oil hydraulic motor big, cost is high, limited the application area of product; (2), the logical high pressure oil in spheroid cylinder top, the bottom is the housing inner chamber, under action of hydraulic force, the spheroid cylinder breaks away from the endosphere wall of cylinder cap easily, causes serious leakage to cause product reliability poor; (3), the cylinder cap endosphere wall of design major diameter, large contact surface, make this friction pair heating serious, mechanical efficiency is low.

The patent No. be CN03232253.4's " a kind of radial swing cylinder plunger hydraulic motor ", adopt ball-and-socket in cylinder cap bulb and the tilt cylinder, sphere and two pairs of ball pivot friction pairs of bearing housing outer spherical surface structure at the bottom of the plunger, when high-pressure and hydraulic oil acts on the plunger, because plunger and tilt cylinder are swung with ball pivot, though the lateral force of having avoided plunger that the tilt cylinder inwall is produced.But " (1), cylinder cap shape are very complicated; the convex bulb is again at the cylinder cap inner chamber; processing difficulties; particularly the bulb inner chamber is provided with the liquid flow channel for oil of many places corner; even for right-angled bend, cause this part up-to-standard rate low, the product cost height; the fluid disturbance must increase noise, lower efficiency also some defectives; (2), guarantee the applying of two ball pivot friction pairs by spring between plunger and the tilt cylinder, therefore the rigidity requirement of spring is bigger, oil hydraulic motor whenever circle spring will working in reciprocating mode once, and stroke is the crankshaft eccentric distance of twice, spring is very easily tired, working life short, poor reliability; (3), sphere and bearing housing outer spherical surface are formed at the bottom of the plunger ball pivot friction pair will bear the fluid seal action, and is thereby very high to the processing request of this part.

In a word, above-mentioned two patent global design complexity, number of spare parts is many, processing request is high, difficulty is big, thereby causes manufacture cost height, poor reliability; Also there is the big connection requirement of lifting surface area height in cylinder cap except that playing supporting role; Exist mechanical efficiency, volumetric efficiency low on the product performance, practicability is relatively poor.

Summary of the invention

Technical problem to be solved in the utility model is: a kind of static balance tilt cylinder type hydraulic motor is provided, and it is simple in structure, cost of production is low, working pressure is high, specific power is big, product efficiency is high, noise is low, good reliability, long service life, practicability are good.

The technical scheme in the invention for solving the above technical problem is: static balance tilt cylinder type hydraulic motor, comprise logical food tray, oil distribution casing, housing and the cover of plunger, the protecgulum that are connected with housing seal, be positioned at the bent axle on the housing central shaft, crankshaft two end is supported by bearing, be separately fixed on housing and the protecgulum, oil distribution casing is connected rotation synchronously, cylinder body circumference uniform distribution odd number plunger case by cross axle with bent axle, be connected with plunger body in the plunger case, plunger body contacts with bearing housing on being enclosed within bent axle.The ball pivot friction pair central through bore that described plunger body is formed along bulb, spheric seating slides up and down, central through bore can be passed up to the cover of plunger inner chamber in its end, described plunger body is divided into upper and lower two chambeies by damping hole, cavity of resorption hydraulic pressure face is less than epicoele hydraulic pressure face, cavity of resorption is 55～99% of an epicoele, spheric seating is fixed in the plunger case inner chamber, and spheric seating contains bulb and its coupling.

Compared with prior art, advantage of the present utility model is: (1) has broken through the traditional design theory, the design of employing hydrostatic support, make the core part plunger body stress balance of transformation of energy, the ball pivot friction pair center hole that plunger body is formed along bulb, spheric seating moves, ball pivot is stressed little, the very little frictional force that produces when only bearing the plunger body motion in theory, just to its moved guiding, supporting effect, thereby the efficient and the working pressure of product have been improved, good starting efficiency is arranged, prolonged working life, widened the using scope of product.Because of plunger body does not contact with the plunger case cavity wall, reduce friction pair quantity again, reduced the oil hydraulic motor volume, improved the specific power of product; (2) simplify the structure and reduced number of spare parts, and part is simple and easy to processing, reduced product cost, improved product reliability, (3) liquid flow channel for oil is simple, hydraulic oil directly enters in the plunger body cavity, has not only simplified sealing but also stopped the hidden danger that high pressure oil leaks outside, and has reduced the linear loss and the noise of fluid simultaneously.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the dextrad sectional view of Fig. 1.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

As shown in Figure 1 and Figure 2, static balance tilt cylinder type hydraulic motor comprises that logical food tray 1, oil distribution casing 2, housing 4 reach and protecgulum 7, the cover of plunger 9 of housing seal, bent axle 8 two ends that are positioned on the housing central shaft are supported by bearing 5, be separately fixed on housing 4, the protecgulum 7, oil distribution casing is connected rotation synchronously by cross axle 3 with bent axle, the cylinder body circumference is evenly equipped with 5 or 7 by radially being radial, 9...... odd number plunger case, and plunger case also can be designed to two misarrangement position structure arranged.

There is damping hole 15 lower end, plunger body 12 center, be thin-walled aperture or elongated hole, plunger body is divided into upper and lower two chambeies that communicate, for making two cavity pressures keep in a basic balance, and guarantee that certain residual clamping force is arranged, and make cavity of resorption hydraulic pressure face less than epicoele hydraulic pressure face, now the chamber face is 55～99% of an epicoele face, if select suitable damping hole can make the oil hydraulic motor energy conversion efficiency the highest, thereby make volumetric efficiency, mechanical efficiency product for maximum.

Each plunger body 12 is put into each plunger case, its lower end is close on the bearing housing 6 by two round clasps 11, it can along the circumferential direction be swung, limit it to radially direction motion, 8 on the cylinder bottom surface of plunger body 12 lower ends and bent axle are provided with many row's rollers and bearing housing 6 is formed one group of rolling bearing, cylinder bottom surface, plunger body lower end and bearing housing 6 are close to, under any operating mode, do not produce and rotatablely move, only produce the swing slippage, guaranteed that plunger body cavity of resorption hydrostatic support face is stable, wearing and tearing are minimum, and the long-term work rear hydraulic motor still can keep good characteristic.

Described spheric seating 14 is fixed on the internal chamber wall of housing plunger case lower end, and 4 of housings also are embedded with " C " shape pressure ring 10 with the sealing of " O " RunddichtringO on the housing of spheric seating upper surface, by pressure ring 10 fixedly spheric seating make it mobile.Spheric seating 14 fixed positions are near more from bent axle 8 rotating centers, and the oil hydraulic motor volume is more little, and structure is compact more, and specific power is just big more.

Described spheric seating 14 contains bulb 13, bulb can only be swung along the spheric seating internal surface, play up and down, plunger body cooperates slip within it with bulb, and the central through bore slip also can be passed up to cover of plunger 9 inner chambers in the plunger body end, and bulb is had certain intensity requirements, can bear suffered hydraulic coupling, certain seal length is arranged, guarantee volumetric efficiency.Also can adopt sealing material between bulb and spheric seating, sealing.

During oil hydraulic motor work, high pressure oil is through logical food tray 1, enter the oblique oil duct on oil distribution casing 2 and the housing 4 successively, flow directly in the plunger case and promote plunger body, affact on the bent axle 8 by plunger body, drive bent axle 8 and rotate, reach the purpose of output speed and moment of torsion around the crankshaft rotating center, because plunger body is swung with ball pivot, so always the plunger body force direction points to the center of bent axle.

Claims

1, a kind of static balance tilt cylinder type hydraulic motor, comprise logical food tray (1), oil distribution casing (2), housing (4) and the cover of plunger (9) that is connected with housing seal, protecgulum (7), bent axle (8) two ends are supported by bearing (5), be separately fixed on housing (4) and the protecgulum (7), oil distribution casing (2) is connected rotation synchronously by cross axle (3) with bent axle, cylinder body circumference uniform distribution odd number plunger case, be connected with plunger body (12) in the plunger case, plunger body (12) contacts with bearing housing (6) on being enclosed within bent axle, it is characterized in that described plunger body (12) is along bulb (13), on the ball pivot friction pair central through bore that spheric seating (14) is formed, lower slider, central through bore can be passed up to cover of plunger (9) inner chamber in its end, described plunger body is divided into by damping hole (15), cavity of resorption, cavity of resorption hydraulic pressure face is less than epicoele hydraulic pressure face, the cavity of resorption face is 55～99% of an epicoele face, spheric seating (14) is fixed in the plunger case inner chamber, and spheric seating (14) contains bulb (13) and its coupling.

2, static balance tilt cylinder type hydraulic motor according to claim 1 is characterized in that there is damping hole (15) plunger body (12) lower end, center, is thin-walled aperture or elongated hole.

3, static balance tilt cylinder type hydraulic motor according to claim 1, it is characterized in that spheric seating (14) is fixed on the internal chamber wall of housing (4) plunger case lower end, and with the sealing of " O " RunddichtringO, also be embedded with " C " shape pressure ring (10) on the housing of spheric seating upper surface (4) between housing (4).

4, static balance tilt cylinder type hydraulic motor according to claim 1 is characterized in that plunger body (12) lower end is close on the bearing housing (6) by two round clasps (11).