CN208519080U - A kind of shaft coupling is with cutting tangent tube construction - Google Patents

Abstract

The problem of the utility model provides a kind of shaft coupling with cutting tangent tube construction, can be to avoid seal failure is caused because of O-ring seal aging or damage, reduces the probability of high pressure oil leakage, and structure is simple, is suitable for industrial application.It includes sequentially connected shearing tube head, neck, tube body, the neck inner cavity is located at the oil outlet of the tube body bottom face by oil pipeline connection, the upper end port of the neck inner cavity is closed by the tube head, it is characterised in that: the housing bound fraction of the tube body bottom end and shaft coupling ontology is cambered surface cooperation.

Description

A kind of shaft coupling is with cutting tangent tube construction

Technical field

The utility model relates to hydraulic safety coupling technical field of sealing technology, specially a kind of shaft coupling shearing pipe knot Structure.

Background technique

Hydraulic safety coupling closed coupling sleeve cartridge type it is intracavitary by check valve inject high pressure oil after outer layer expansion with Wheel hub stretching, internal layer then hold axis tightly, and shaft coupling, which can transmit, is no more than the nominal torque according to set by oil pressure；Referring to Fig.1 And Fig. 2, shaft coupling ontology 5 are formed by inner sleeve 5-2 and housing 5-1 fitting, shearing pipe 8 is mounted on the shearing nozzle 6 in housing 5-1 In, it shears port connection below the oil pipeline 8-2 in pipe 8 and unloads oilhole 3, oil pocket 4, the upper end oil pipeline 8-2 is close by tube head 8-6 Envelope；When torque is more than predetermined value, the neck 8-1 of shearing pipe 8 is sheared the cutting of ring 7, and the high pressure oil in oil pocket 4 is by unloading oilhole 3 release in the cut-off place the neck 8-1 of shearing pipe 8, after oil pressure is shed within some thousandths of second, inner sleeve 5-2 and housing 5-1 Restore prototype under the action of elasticity, makes inner sleeve 5-2 and coupling spindle 10 that sliding occur and dally, reach overload protective function；When It excludes reason of over-load and injects high pressure oil after replacing shearing pipe 8, can remain in operation；This tangent tube construction of cutting can be accurate and effective anti- Equipment damage caused by only overloading, is widely used in all and needs in the machine driving protective device of overload protection；Mechanical equipment In use process, the high pressure oil in oil pocket 4 reversely penetrates into shearing nozzle 6 possibly through oilhole 3 is unloaded；Pass through peace in the prior art O-ring seals 8-5 and retaining ring 8-4 in annular groove 8-3 are sealed the oil for unloading the infiltration of oilhole 3 from below, but O-shaped close Seal 8-5 is easy to appear aging because be rubber material, and careless manipulation easilys lead to O-shaped sealing during installing and using 8-5 damage is enclosed, aging or damage can all cause seal failure to cause oil leak, will lead to the oil in oil pocket 4 after long-time oil leak Pressure drop is low, and mechanical generation is made to use failure.

Summary of the invention

In order to solve the problem of to cause seal failure that high pressure oil is caused to be revealed because of O-ring seals aging or damage, this is practical It is novel to provide a kind of shaft coupling with tangent tube construction is cut, seal failure can be led to avoid because of O-ring seal aging or damage Problem reduces the probability of high pressure oil leakage, and structure is simple, is suitable for industrial application.

The structure of the utility model is such that it includes sequentially connected shearing tube head, neck, tube body, the neck Inner cavity is located at the oil outlet of the tube body bottom face by oil pipeline connection, and the upper end port of the neck inner cavity is by the pipe Head closing, it is characterised in that: the housing bound fraction of the tube body bottom end and shaft coupling ontology is cambered surface cooperation.

It is further characterized by:

It further includes O-ring seals, and the O-ring seals are installed on the outer wall annular groove provided circumferentially about of the tube body In；

It further includes retaining ring, and the retaining ring is installed in the annular groove above the O-ring seals；

External screw thread is arranged in the outer surface of tube body；

The outer wall of the tube body is in hexagon below the neck；

It is protruded to outside chamber for hemisphere face structure tube body bottom end end face.

In the above structure of the utility model, shearing pipe and the installation position shape in the housing of the shaft coupling ontology where it At cutting tangent tube construction；Tube body bottom face is set as globoidal structure, and shearing pipe is mounted in the shearing nozzle being set in housing, and The cavity shape for shearing nozzle is matched with the outer wall shape for the shearing pipe for installing its inside, then shears tube bottom end face and sheared edge bottom The cooperation of end face inner surface cambered surface, forms cambered surface sealing structure after closely abutting, the hard seal form of cambered surface sealing is closeer than plane The effect of envelope is more preferable；High pressure oil in oil pocket enters in the inner cavity of shearing pipe from the oilhole that unloads that oil pipeline bottom end is connected to, shearing The upper end of tube cavity is sealed by tube head, lower end because ball face sealing structure exist, even if not use O-ring seals and retaining ring It realizes sealing effect, the problem of effective solution leads to seal failure because of O-ring seals aging or damage, reduces height The probability that pressure oil is revealed from shearing pipe side wall.

Detailed description of the invention

Fig. 1 is that existing structure is mounted on the positional structure schematic diagram in shaft coupling；

Fig. 2 is the schematic diagram of the section structure of existing structure；

Fig. 3 is the schematic diagram of the section structure of the utility model；

Fig. 4 is enlarged structure schematic diagram at the utility model A.

Specific embodiment

As shown in Fig. 3 ~ Fig. 4, it includes sequentially connected tube head 9-6, neck 9-1, tube body 9-7 that the utility model, which includes it, The inner cavity neck 9-1 is located at the oil outlet 9-10 of tube body 9-7 bottom face, the upper end of the inner cavity neck 9-1 by oil pipeline 9-2 connection Port is closed by tube head 9-6, and the bound fraction of the housing 5-1 of the bottom end tube body 9-7 and shaft coupling ontology 5 is cambered surface cooperation, tube body The bottom end 9-7 is hemisphere face structure towards the globoidal structure 9-9 protruded outside chamber；The outer wall of tube body 9-7 is in six below neck 9-1 Angular 9-8；External screw thread is arranged in the outer surface tube body 9-7；

Shearing pipe 9 is installed in the shearing nozzle 6 in housing 5-1, and shearing ring 7 is socketed on housing 5-1 outer wall, shears pipe 9 Neck 9-1 be installed at the notch 7-1 on shearing ring 7, tube head 9-6 is located at the top of shearing ring 7, shearing 9 bottom face of pipe Oil outlet 9-10 connection unloads oilhole 3 positioned at shearing 6 bottom of nozzle, and then is connected to oil pocket 4；External screw thread is arranged in tube body 9-7 outer wall, Shearing pipe 9 is threadedly coupled with shearing nozzle 6, when installation, passes through the hexagon 9-8 progress of spanner twisting tube body 9-7 outer wall Shearing pipe 9 is tightened in rotation, abuts the bottom face 9-9 for the hemisphere face structure for shearing pipe 9 and the bottom face of shearing nozzle 6 closely, Ball face sealing structure is formed, position is carried out by the external screw thread of tube body 9-7 outer wall and is fixed；When oiling, after shearing pipe 9 is tightened It moves back pine 1/4 to 1/2 to enclose, the high pressure oil for injecting setting oil pressure from side oil filler point 2 after oiling, tightens shearing into oil pocket 4 Pipe 9, the cross-drilled hole for shearing 6 side of nozzle by 1 pair of sealing hole are sealed；High pressure oil in oil pocket 4 can be entered by unloading oilhole 3 In the oil pipeline 9-2 for shearing 9 inner cavity of pipe, because of the sealing process of tube head 9-6, leakage will not be generated, because of the bottom of shearing pipe 9 The bottom face of end face 9-9 and shearing nozzle 6 is ball face sealing structure, can be connected to oil outlet 9-10 with the upper end for unloading oilhole 3 Place is sealed, and prevents high pressure oil from overflowing from the bottom face 9-9 of shearing pipe 9 and the bottom face contact position of shearing nozzle 6；Work as torque When more than predetermined value, the neck 9-1 of shearing pipe 9 is sheared the cutting of ring 7, and high pressure oil releases in the place that neck 9-1 is cut off, oil It is pressed in after being shed in some thousandths of second, interior external connecting sleeve restores prototype under the action of elasticity, makes shaft coupling ontology 5 and coupling spindle 10 occur sliding and dally, and reach overload protective function.

O-ring seals 9-5 is installed in the outer wall annular groove 9-3 provided circumferentially about of tube body 9-7；O-ring seal 9-5's sets It sets and further reduces the probability that high pressure oil is revealed from shearing pipe side wall；Retaining ring 9-4 is installed on above O-ring seals 9-5 Annular groove 9-3 in because the material of O-ring seals 9-5 be rubber, once external force makes O-ring seal 9-5 and annular groove 9-3 side wall When generating extruding, O-ring seals 9-5 deformation breakage will lead to, retaining ring 9-4 is soft material product, can prevent O shape from sealing It encloses 9-5 and annular groove 9-3 side wall generates extruding, reduce the damaged probability of O-ring seals 9-5 deformation, further solve because of O shape The problem of sealing ring aging or damage lead to seal failure reduces the probability that high pressure oil is revealed from shearing pipe side wall.

After the technical solution of the utility model, shearing tube bottom end face is set as hemisphere face structure, shears the bottom end of pipe Face is closely abutted with the bottom face of shearing nozzle, forms ball face sealing structure, as the first seal structures, to oil outlet with unload The upper end connectivity part of oilhole is sealed, and prevents high pressure oil from overflowing from the bottom face of shearing pipe and the bottom face contact position of shearing nozzle Out；Side wall and shearing of the high pressure oil from shearing pipe are prevented as the second seal structures by setting O-ring seals and retaining ring It overflows internal wall of pipe orifice contact position；The setting of two sealed structures effectively reduces the probability of the leakage of high pressure oil.

Claims (6)

1. a kind of shaft coupling is with cutting tangent tube construction comprising sequentially connected shearing tube head, neck, tube body, the neck inner cavity It is located at the oil outlet of the tube body bottom face by oil pipeline connection, the upper end port of the neck inner cavity is sealed by the tube head It closes, it is characterised in that: the bound fraction of the housing of the tube body bottom end and shaft coupling ontology is cambered surface cooperation.

2. a kind of shaft coupling is with cutting tangent tube construction according to claim 1, it is characterised in that: it further includes O-ring seals, institute O-ring seals are stated to be installed in the outer wall annular groove provided circumferentially about of the tube body.

3. a kind of shaft coupling is with cutting tangent tube construction according to claim 2, it is characterised in that: it further includes retaining ring, the gear Circle is installed in the annular groove above the O-ring seals.

4. a kind of shaft coupling is with cutting tangent tube construction according to claim 1, it is characterised in that: the outer surface of tube body setting is outer Screw thread.

5. a kind of shaft coupling is with cutting tangent tube construction according to claim 1, it is characterised in that: described in being located at below the neck The outer wall of tube body is in hexagon.

6. a kind of shaft coupling is with cutting tangent tube construction according to claim 1, it is characterised in that: tube body bottom end end face is to chamber Outer protrusion is hemisphere face structure.