CN2597696Y

CN2597696Y - Radial plunger-type hydraulic motor of end face compensation oil distributing

Info

Publication number: CN2597696Y
Application number: CNU032231024U
Authority: CN
Inventors: 何剑锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-01-21
Filing date: 2003-01-21
Publication date: 2004-01-07
Anticipated expiration: 2013-01-21

Abstract

The utility model relates to a head surface compensation oil radial plunger hydraulic motor , which is composed of a shell, a front cover, an eccentric shaft, a fuel tank, a piston, a cylinder cover, a keep ring, a rear cover, an oil setting transmission shaft, a positioning ring and a floating ring; wherein, the cylinder cover center is provided with a cavity; the inner head surface of the cylinder cover is a bulgy first sphere pair; the cavity is provided with a hanging bar ring and a hanging bar; the lower end of the hanging bar is arranged in the piston; the piston is internally provided with a first spring; the piston acts in accordance with the first sphere pair; the upper surface of the eccentric shaft is a bulgy second sphere pair which is corresponding to a mating surface of the fuel tank. The utility model is little in wear, high in machine efficiency and volume efficiency and good in low speed stability.

Description

End-face compensate is joined oily radial piston hydraulic motor

Technical field:

The utility model relates to a kind of star oil hydraulic motor, and particularly a kind of end-face compensate is joined oily radial piston hydraulic motor.

Background technique:

Existing oil hydraulic motor adopts end-face compensate to join oily crankshaft connecting rod type oil hydraulic motor more, its working principle is that a plurality of plunger cases (being generally 5 or 7) evenly are set on the circumference of housing, oil cylinder is fixed on the housing, piston is moving linearly in oil cylinder, piston is connected with connection rod sphere by ball pivot, a throttling pore is set in the middle of the connecting rod begins straight-through connecting rod bottom from connection rod sphere, cylndrical surface, connecting rod bottom is connected with the eccentric cylinder of bent axle, adopts the mode of hydrostatic bearing to work.But there is following defective in said structure: 1. the eccentric cylinder of connecting rod cylndrical surface, bottom and bent axle adopts the hydrostatic bearing mode, therefore junction plane is big, make that the part processing difficulty is big, the center throttling pore stop up or fitting surface because of wearing and tearing or other reason cause leaking when excessive, just can not produce static pressure, at this moment oil pressure all acts on the bent axle fitting surface by piston in the plunger, the excessive easy wearing and tearing of active force between the friction pair influence working life; 2. because oil cylinder is fixed, there is unsettled canting power between ball head connecting rod when swing oil cylinder and the piston, is easy to generate wearing and tearing, causes volumetric efficiency decline, thus less stable when making the lower and low speed of mechanical efficiency.

Summary of the invention:

For addressing the above problem, it is long that the utility model provides a kind of life-span, and it is little to wear and tear, and can effectively improve oil hydraulic motor machinery efficient, and volumetric efficiency and low-speed stability end-face compensate are preferably joined oily radial piston hydraulic motor.

For achieving the above object, the utility model provides following technological scheme: comprise housing, protecgulum, eccentric shaft, oil cylinder, piston, cylinder cap, retaining ring, bonnet, oil distribution casing, transmission shaft, positioning ring, floating ring, wherein said cylinder cap center is provided with cavity, first spherical pair of cylinder cap interior edge face for protruding, cavity communicates by second oil duct in first oil duct and the housing, peg ring and peg are installed in the cavity, the peg ring is fixed on the inner chamber of cylinder cap with snap ring, the lower end of peg is installed in the piston by spring cup, and fix with self-locking nut, be provided with first spring in the described piston, first spherical pair of piston and cylinder cap interior edge face matches to merge and freely swings, and the upper-end surface of described eccentric shaft is for protruding second spherical pair, and match with the fitting surface of oil cylinder, the cylindrical of oil cylinder is provided with groove and cooperates with retaining ring.

The utility model is owing to adopt at piston, crucial friction pair such as eccentric shaft and swing fulcrum all adopt the form of spherical pair, allow in-oil cylinder high pressure oil pressure act directly on the spherical pair of cylinder cap and eccentric shaft, the moment of rotation of eccentric shaft is directly promoted by the high pressure oil column like this, rather than promote by oil cylinder, thereby friction and wearing and tearing have been reduced, and because the axis of oil cylinder and piston is in the oil hydraulic motor working procedure on the line of the eccentric shaft centre of sphere and the cylinder cap centre of sphere all the time, so can not produce canting power in oil cylinder and the piston reciprocates process, thereby guarantee that the oil hydraulic motor wearing and tearing are little, life-span is long, can effectively improve oil hydraulic motor machinery efficient and volumetric efficiency, thereby guarantee that low-speed performance is stable.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Below in conjunction with accompanying drawing the utility model is described in further detail:

Embodiment:

As shown in Figure 1, the utility model comprises housing 1, protecgulum 2, eccentric shaft 3, oil cylinder 4, piston 5, cylinder cap 10, retaining ring 12, bonnet 13, oil distribution casing 14, transmission shaft 15, positioning ring 16, floating ring 17, wherein said cylinder cap 10 centers are provided with cavity, the first spherical pair SR1 of the interior edge face of cylinder cap 10 for protruding, cavity communicates by the second oil duct B in the first oil duct A and the housing 1, peg ring 8 and peg 9 are installed in the cavity, peg ring 8 usefulness snap rings are fixed on the inner chamber of cylinder cap 10, peg ring 8 has certain clearance with peg 9 fitting surfaces, the lower end of peg 9 is installed in the piston 5 by spring cup 11, and it is fixing with self-locking nut 7, be provided with first spring 6 in the described piston 5, and piston 5 is designed to the through hole shape, the first spherical pair SR1 of the interior edge face of piston 5 and cylinder cap 10 matches to merge and freely swings, and the spherical diameter of piston 5 is the same with the spherical diameter of cylinder cap 10, the swing fulcrum the when sphere centre of cylinder cap 10 is piston 5 swings; Described oil cylinder 4 is designed to the through hole shape, oil cylinder 4 endoporus cooperate with the cylindrical of piston 5, do reciprocating linear motion, be provided with eccentric shaft 3 below the oil cylinder 4, the upper-end surface of described eccentric shaft 3 is for protruding the second spherical pair SR2, and match with the fitting surface of oil cylinder 4, the spherical diameter of oil cylinder 4 is the same with the spherical diameter of the upper-end surface of eccentric shaft 3, the cylindrical of oil cylinder 4 is provided with groove and cooperates with retaining ring 12, oil cylinder 4 can be around the spherical motion of eccentric shaft 3 in the constraint plane of retaining ring 12 like this, again owing in piston 5, be provided with first spring 6, can guarantee that in oil cylinder 4 and piston 5 to-and-fro motion processes piston 5 stretches out when the longest and between each spherical pair enough precompressions arranged all, makes piston 5 and cylinder cap 10, oil cylinder 4 can not separate and leakage of oil with the spherical pair of eccentric shaft 3.

Floating ring 17 is arranged on bonnet 13 and is furnished with between the dish 14, and be installed on the bonnet 13 by second spring 18 and pilot pin 19, floating ring 17 is scalable motion under the effect of spring, oil distribution casing 14 rotates between the ear end face of floating ring 17 and housing 1, so gapped or when wearing and tearing between the oil distribution mechanism fitting surface, all can compensate automatically by floating ring 17.

The sphere width of the first spherical pair SR1 of the present utility model and the second spherical pair SR2 is 2.5～4.5mm, best sphere width is 3mm, the utility model is because oil distribution mechanism adopts end face to join oily mode in addition, can compensate end face matching gap and wearing and tearing automatically by floating ball 17, thereby have specific diameter to the higher volumetric efficiency of flow.

Claims

1. an end-face compensate is joined oily radial piston hydraulic motor, comprises housing, protecgulum, eccentric shaft, oil cylinder, piston, cylinder cap, retaining ring, bonnet, oil distribution casing, transmission shaft, positioning ring, floating ring; It is characterized in that: described cylinder cap center is provided with cavity, first spherical pair of cylinder cap interior edge face for protruding, cavity communicates by second oil duct in first oil duct and the housing, peg ring and peg are installed in the cavity, the peg ring is fixed on the inner chamber of cylinder cap with snap ring, the lower end of peg is installed in the piston by spring cup, and fix with self-locking nut, be provided with first spring in the described piston, first spherical pair of piston and cylinder cap interior edge face matches to merge and freely swings, the upper-end surface of described eccentric shaft is protrusion second spherical pair, and matches with the fitting surface of oil cylinder, and the cylindrical of oil cylinder is provided with groove and cooperates with retaining ring.

2. end-face compensate according to claim 1 is joined oily radial piston hydraulic motor, it is characterized in that: described floating ring is arranged on bonnet and is furnished with between the dish, and is installed on the bonnet by second spring and pilot pin.

3. end-face compensate according to claim 1 is joined oily radial piston hydraulic motor, it is characterized in that: the sphere width of described first spherical pair and second spherical pair is 2.5～4.5mm.

4. end-face compensate according to claim 3 is joined oily radial piston hydraulic motor, it is characterized in that: the sphere width of described first spherical pair and second spherical pair is 3mm.