CN205173259U - Prevent killing oil injection coupling - Google Patents

Abstract

The utility model provides a prevent killing oil injection coupling, it can be solved current oil injection coupling and make easily because the oil film that is difficult for cleaing away that exists or small impurity are gone up to the excircle of axle table in the use that the endotheca internal surface is pulled, an endotheca and a problem of killing even. It includes endotheca and overcoat, the coaxial plug bush of endotheca is and the outer periphery of the inner circumference of overcoat and endotheca is taper fit in the overcoat, the hole of endotheca is the constant diameter round hole, the primary shaft, it is downthehole that the secondary shaft inserts the endotheca from both ends respectively, be provided with step piston chamber in the less one end of overcoat bore diameter, the axial outside end in step piston chamber is provided with the piston, the piston is provided with rubber seal towards a side in step piston chamber, the piston is passed through in step piston chamber, rubber seal is sealed, its characterized in that: be provided with on the inner peripheral surface of endotheca along the continuous heliciform rubbish groove that the axial is extended to both ends.

Description

One is anti-kills hydrocoupling

Technical field

The utility model relates to coupler structure technical field, especially relates to hydrocoupling construction applications, is specially one and prevents killing hydrocoupling.

Background technique

Coupling is a kind of common part connecting diaxon or coupling shaft and revolving meber, and it together turns round in transmission motion and dynamic process natural axis does not throw off.In coupling, have a kind of hydrocoupling, it comprises the overcoat of coaxial sleeve heavy wall together and the inner sleeve of thin-walled, and the coaxial sleeve of axle is in inner sleeve, and wherein, the inner peripheral surface of overcoat and the outer circumferential face of inner sleeve are with certain tapering corresponding matching.This kind of hydrocoupling when mounted, inject high pressure oil by radial direction and be pressed on overcoat radial outward dilations on axle to its conical surface chien shih inner sleeve, simultaneously axial oil is injected piston cavity and is made overcoat engage the conical surface to the large Slideslip of inner sleeve diameter along inner sleeve, inner sleeve is forced to be shunk and overcoat expansion, when the moving displacement of overcoat reaches design flow, unscrew bolt and discharge high pressure oil, now, there is positive pressure between inner sleeve and overcoat interference fit face, the work frictional force that namely positive pressure produces whereby carrys out transmitting torque.

At present, the hydrocoupling for connecting between axle of domestic production, in as installed process, because cabin installation environment is poor or the factor such as peopleware, on the periphery of axle can existence some clean sordid oil film and other reject unclear minute impurities, so very easily pull inner surface of inner race, inner sleeve and axle even can be caused to kill, cause Complete coupling to be scrapped.

Summary of the invention

For the problems referred to above, the utility model provides a kind of anti-kills hydrocoupling, and it can solve existing hydrocoupling and in use easily make due to the oil film of not easy-clear that the cylindrical table of axle exists or minute impurities that institute's inner surface of inner race is pulled, even inner sleeve and the axle problem of killing.

Its technological scheme is such, one is anti-kills hydrocoupling, it comprises inner sleeve and overcoat, the coaxial sleeve of described inner sleeve is in described overcoat and the inner peripheral surface of described overcoat and the outer peripheral surface of inner sleeve are taper fit, the endoporus of described inner sleeve is isometrical circular hole, first axle, second axle inserts from two ends in the endoporus of described inner sleeve respectively, one end less at described overcoat diameter of bore is provided with step piston chamber, the axial outboard end in described step piston chamber is provided with piston, described piston is provided with rubber seal towards a side in described step piston chamber, described step piston chamber is by described piston, rubber seal rings for seal, the body of described overcoat has the first hydraulic fluid port be communicated with described step piston chamber, the stage casing of described outer sheath inner circumferential surface is provided with the oil groove of thread-shaped, the body of described overcoat also has through body and the second hydraulic fluid port be communicated with described oil groove, it is characterized in that: the inner peripheral surface of described inner sleeve is provided with the continuous print helical trash chute extended to two ends vertically.

Further, the cross section of described trash chute is U-shaped.

Further, the spacing of often enclosing between spiral of described helical trash chute is equal.

Further, the often spacing of enclosing between spiral of described helical trash chute is 20mm ~ 25mm.

Further, described piston, rubber seal are all set on the outer circumferential face of described inner sleeve.

Further, described piston thread is connected on the outer circumferential face of described inner sleeve.

Further, the axial outboard end of described piston is provided with pressure ring, firm by fastening screw trip bolt between the end face of described pressure ring and described overcoat.

Further, described overcoat is provided with adpting flange away from one end of described piston, the central axis of described adpting flange and the central axes of described overcoat.

Further, described overcoat and described adpting flange are wholely set.

The beneficial effects of the utility model are: it is by being opened in the continuous print helical trash chute extended to two ends to axis on inner sleeve inner peripheral surface, ensure the oil film of not easy cleaning axle outer circumferential face existed when inner sleeve is pressed on axle and other reject in the trash chute that unclear minute impurities is squeezed on inner sleeve inner peripheral surface, thus to avoid between surface of contact that oil film and impurity is pressed into inner sleeve and axle and to pull inner sleeve surface, even inner sleeve and the axle phenomenon of killing, thus extend the working life of hydrocoupling, greatly reduce the scrappage of whole hydrocoupling, save production cost, and U-shaped is arranged in the cross section of trash chute, the clean cleaning of trash chute can be convenient to, by equal for the spacing of often enclosing between spiral of helical trash chute, and be 20mm ~ 25mm by the often spacing of enclosing between spiral of helical trash chute, can ensure that oil film on axle outer circumferential face and minute impurities can be squeezed in trash chute further, thus more effectively prevent the phenomenon that inner sleeve and axle are killed, extend the working life of hydrocoupling.

Accompanying drawing explanation

Fig. 1 is a kind of anti-structural representation of killing hydrocoupling embodiment one of the utility model;

Fig. 2 is that a kind of anti-master killing the inner sleeve of hydrocoupling of the utility model looks cross-sectional schematic;

Fig. 3 is the close-up schematic view at I place in Fig. 2;

Fig. 4 is a kind of anti-structural representation of killing hydrocoupling embodiment two of the utility model.

Reference character: 1-first axle; 2-inner sleeve; 3-overcoat; 4-second hydraulic fluid port; 5-first hydraulic fluid port; 6-step piston chamber; 7-piston; 8-pressure ring; 9-fastening screw trip bolt; 10-second axle; 11-rubber seal; 12-trash chute; 13-adpting flange; 14-thread-shaped oil groove.

Embodiment

Embodiment one:

See Fig. 1, Fig. 2 and Fig. 3, one is anti-kills hydrocoupling, it comprises the inner sleeve 2 of thin-walled and the overcoat 3 of heavy wall, the coaxial sleeve of inner sleeve 2 is in overcoat 3 and the outer peripheral surface of the inner peripheral surface of overcoat 3 and inner sleeve 2 is taper fit, the endoporus of inner sleeve 2 is isometrical circular hole, first axle 1, second axle 10 inserts from two ends in the endoporus of inner sleeve 2 respectively, one end that the diameter of bore of overcoat 3 is less is provided with step piston chamber 6, the axial outboard end in step piston chamber 6 is provided with piston 7, piston 7 is provided with rubber seal 11 towards a side in step piston chamber 6, piston 7, rubber seal 11 is all set on the outer circumferential face of inner sleeve 2, and piston 7 is threadedly connected on the outer circumferential face of inner sleeve 2, the axial outboard end of piston 7 is provided with pressure ring 8, fastening by fastening screw trip bolt 9 between the end face of pressure ring 8 and overcoat 3, thus pressure ring 8 is by piston 7, rubber seal 11 is pressed in step piston chamber 6 one side end, ensure the sealing in step piston chamber 6, the body of overcoat 3 has the first hydraulic fluid port 5 be communicated with step piston chamber 6, the stage casing of the inner peripheral surface of overcoat 3 is provided with the oil groove 14 of thread-shaped, the body of overcoat 3 also has through body and the second hydraulic fluid port 4 be communicated with oil groove 14, the inner peripheral surface of inner sleeve 2 is provided with the continuous print helical trash chute 12 extended to two ends vertically, the cross section of trash chute 12 is U-shaped, the spacing of often enclosing between spiral of helical trash chute 12 is equal, and the often spacing of enclosing between spiral of helical trash chute is 20mm ~ 25mm.

The place that embodiment two is different from embodiment one is only that overcoat 3 is provided with adpting flange 13 away from one end of piston 7, sees Fig. 4, the central axis of adpting flange 13 and the central axes of overcoat 3.

Claims (9)

1. prevent killing hydrocoupling for one kind, it comprises inner sleeve and overcoat, the coaxial sleeve of described inner sleeve is in described overcoat and the inner peripheral surface of described overcoat and the outer peripheral surface of inner sleeve are taper fit, the endoporus of described inner sleeve is isometrical circular hole, first axle, second axle inserts from two ends in the endoporus of described inner sleeve respectively, one end less at described overcoat diameter of bore is provided with step piston chamber, the axial outboard end in described step piston chamber is provided with piston, described piston is provided with rubber seal towards a side in described step piston chamber, described step piston chamber is by described piston, rubber seal rings for seal, the body of described overcoat has the first hydraulic fluid port be communicated with described step piston chamber, the stage casing of described outer sheath inner circumferential surface is provided with the oil groove of thread-shaped, the body of described overcoat also has through body and the second hydraulic fluid port be communicated with described oil groove, it is characterized in that: the inner peripheral surface of described inner sleeve is provided with the continuous print helical trash chute extended to two ends vertically.

2. one according to claim 1 is anti-kills hydrocoupling, it is characterized in that: the cross section of described trash chute is U-shaped.

3. one according to claim 1 and 2 is anti-kills hydrocoupling, it is characterized in that: the spacing of often enclosing between spiral of described helical trash chute is equal.

4. one according to claim 3 is anti-kills hydrocoupling, it is characterized in that: the often spacing of enclosing between spiral of described helical trash chute is 20mm ~ 25mm.

5. one according to claim 4 is anti-kills hydrocoupling, it is characterized in that: described piston, rubber seal are all set on the outer circumferential face of described inner sleeve.

6. one according to claim 5 is anti-kills hydrocoupling, it is characterized in that: described piston thread is connected on the outer circumferential face of described inner sleeve.

7. the one according to claim 5 or 6 is anti-kills hydrocoupling, it is characterized in that: the axial outboard end of described piston is provided with pressure ring, firm by fastening screw trip bolt between the end face of described pressure ring and described overcoat.

8. one according to claim 7 is anti-kills hydrocoupling, it is characterized in that: described overcoat is provided with adpting flange away from one end of described piston, the central axis of described adpting flange and the central axes of described overcoat.

9. one according to claim 8 is anti-kills hydrocoupling, it is characterized in that: described overcoat and described adpting flange are wholely set.