CN208519077U - A kind of safety coupling - Google Patents

Abstract

The utility model provides a kind of safety coupling, structure is simple, requirement on machining accuracy is low, it is at low cost, be suitable for industrial application.It includes shaft coupling ontology, oil pocket is offered in the shaft coupling body interior, the shaft coupling body exterior is socketed shearing ring, it is characterized by: it further includes fuel feeding valve, the fuel feeding valve is installed on the fuel feed hole of the oil pocket, and the fuel feeding valve includes the oiling chamber of sequential communication, shearing pipe and spring cavity；Its lower end of spring in the spring cavity is pressed in the hole wall of the fuel feed hole, the bottom end of the spring cavity is connected to the oil pocket, the upper end of the spring is pressed with spin, the spin is located at the neck position of the shearing pipe, and the spin closes the outlet of the oiling chamber under the action of spring.

Description

A kind of safety coupling

Technical field

The utility model relates to hydraulic safety coupling technical field of sealing technology, specially a kind of safety coupling.

Background technique

Safety coupling be couple mover and working machine a kind of component, major function is overload protection, when overload or Mechanical breakdown and when required torque being caused to be more than setting value, the gate gurgle valve on safety coupling is cut off, and is limited in the form of skidding The torsion that transmission system processed is driven, reaches overload protective function；Existing axis connection safety coupling oil injection structure generally has 2 Kind: the first structure as shown in Figure 1, be provided with 3 apertures on the same profile of setting, i.e., the oil leak hole 2 of installation shearing pipe 4, The relative position of oiling interface 9 and oiling seal orifice 8, this 3 pore structure mesoporous requires height, and difficulty of processing is big, if processing There is fine error, 3 holes are not connected on same profile, will result in scrap of the product；Second of structure as shown in Fig. 2, 4 apertures, the i.e. oil leak hole 2 of installation shearing pipe 4, oiling interface 10, oiling joint aperture are provided on the same profile of setting The inclined hole 12 opened up will also open oilhole 11 in the side of oiling interface 10, and this 4 pore structure is more complicated, difficulty of processing It is bigger；Both oil injection structures are all very complicated, need to open up multiple holes to communicate with each other on shaft coupling ontology, because structure is multiple It is miscellaneous, cause requirement on machining accuracy height, processing cost high.

Summary of the invention

In order to solve the problems, such as because oil injection structure it is more complex caused by it is high to requirement on machining accuracy, processing cost is high, this reality Provide a kind of safety coupling with novel, structure is simple, requirement on machining accuracy is low, it is at low cost, be suitable for industrial application.

The structure of the utility model is such that it includes shaft coupling ontology, offers in the shaft coupling body interior Oil pocket, the shaft coupling body exterior are socketed shearing ring, it is characterised in that: it further includes fuel feeding valve, and the fuel feeding valve is installed on The fuel feed hole of the oil pocket, the fuel feeding valve include the oiling chamber of sequential communication, shearing pipe and spring cavity；In the spring cavity The press fitting of its lower end of spring is connected to the oil pocket, the upper end of the spring in the hole wall of the fuel feed hole, the bottom end of the spring cavity It is pressed with spin, the spin is located at the neck position of the shearing pipe, and the spin closes institute under the action of the spring State the outlet of oiling chamber.

It is further characterized by:

The fuel feeding valve is arranged in pairs on the shaft coupling ontology circumference, is radially separated by 180 degree；

The neck of the shearing pipe is located at the opening on the shearing ring；

The shape for being located at the lower section of the shearing pipe on the outer wall of the spring cavity is hexagon；

It is threadedly coupled between the fuel feeding valve and the fuel feed hole；

The inner surface of the oiling chamber is flank；

The bottom end of the oiling chamber is hemisphere face structure towards protruding outside chamber；

The bottom end of the spring cavity is hemisphere face structure towards protruding outside chamber.

A kind of safety coupling provided by the utility model need to only open up a fuel feed hole, by being integrated with shearing pipe Three oiling, sealing, emptying processes are completed at the same time with the fuel feeding valve of fuel feeding valve function；The utility model eliminate seal orifice, Oilhole is unloaded, only retains a kind of fuel feed hole, without considering the relative position between several holes when processing, it is only necessary to consider one kind The structure in hole, structure is simple, and requirement on machining accuracy is low, has simplified manufacturing procedure, reduces processing cost.

Detailed description of the invention

Fig. 1 is the partial profile structure of the first existing structure

Fig. 2 is the partial profile structure of existing second of structure；

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

Fig. 4 is the structural schematic diagram of fuel feeding valve.

Specific embodiment

As shown in Fig. 1 ~ Fig. 4, the utility model includes shaft coupling ontology 3, and the outside of axis 7 is arranged in shaft coupling ontology 3, Oil pocket 5 is offered inside shaft coupling ontology 3, is socketed shearing ring 1 outside shaft coupling ontology 3, is further included fuel feeding valve 6, fuel feeding valve It is installed on the fuel feed hole 2 of oil pocket 5, fuel feeding valve 6 includes the oiling chamber 6-1 of sequential communication, shearing pipe 6-4 and spring cavity 6-2；Spring Its lower end spring 6-5 press fitting in chamber 6-2 is in the hole wall of fuel feed hole 2, and the bottom end of spring cavity 6-2 is connected to oil pocket 5, spring 6-5's Upper end is pressed with spin 6-3, and spin 6-3 is located at the neck position of shearing pipe 6-4, and spin 6-3 is closed under the action of spring 6-5 The outlet of oiling chamber 6-1；The neck of shearing pipe 6-4 is located at the opening 1-1 on shearing ring 1；

The intracavitary shape of fuel feed hole 2 is matched with the shape that fuel feeding valve 6 is mounted in shaft coupling ontology 3, is led to below fuel feed hole 2 It crosses oil-through-hole 13 and is connected to oil pocket 5, in other words the upper end port of the bottom end outlet 6-9 connection oil-through-hole 13 of spring cavity 6-2, leads to oil The diameter in hole 13 is less than the diameter of outlet 6-9, and the bottom end of spring 6-5 is pressed in the upper end end face of oil-through-hole 13；Spring 6-5 is pressure It is attached in the inner cavity of valve body 6-2, because the elastic force of compression generation is as pretightning force, is applied on spin 6-3, the diameter of spin 6-3 Greater than oiling chamber 6-1 outlet diameter, then under the action of spring 6-5 spin 6-3 sealed oiling chamber 6-1 outlet；Spherical surface is close The contact surface of envelope is small, and abrasion is small, and sealing effect is more preferable compared with flat seal, and if it is the bottom face of planar structure, needs It to be sealed using the sealing element of rubber, and the hard seal form of ball face sealing, without using other sealing element；Spin The setting of 6-3 avoids high pressure oil and overflows from the bottom end outlet of oiling chamber 6-1, and saves the use of sealing element；

When oiling, high-pressure oil pipe is inserted into oiling chamber 6-1, and high pressure oil strikes the spin 6-3 high on spin 6-3 Pressure oil pushes compressed spring 6-5, and gap is formed between the outlet oiling chamber 6-1 and spin 6-3, and high pressure oil is entered by gap to be cut It is flowed into spring cavity 6-2 behind the inner cavity Pipe Cutting 6-4, enters oil pocket 5 finally by oil-through-hole 13；After oiling, compressed spring 6-5 Thrust disappear, the pretightning force of pressure and spring 6-5 that the high pressure oil in oil pocket 5 generates forces in spin 6-3 jointly, makes to roll Ball 6-3 is again sealed off the outlet of the bottom end oiling chamber 6-1, avoids high pressure oil and flows backwards and overflows；When overload or mechanical breakdown cause When required torque is more than setting value, the cutting of shearing ring 1 is located at the shearing pipe 6-4 at its 1-1 that is open, positioned at the pipe of shearing pipe 6-4 The air-proof condition of the spin 6-3 of neck position is destroyed, and the high pressure oil in oil pocket 5 passes through oil-through-hole 13 from shearing pipe 6-4 breakage It overflows, to play the role of overload protection.

Fuel feeding valve 6 is arranged in pairs on 3 circumference of shaft coupling ontology, is radially separated by 180 degree；The fuel feeding valve 6 being arranged in pairs Make to make discharge velocity when oiling effect and overload protection reach best effects.

The shape for being located at the lower section of shearing pipe 6-4 on the outer wall of spring cavity 6-2 is hexagon 6-6；Fuel feeding valve 6 and fuel feed hole It is threadedly coupled between 2；Internal screw thread is set in fuel feed hole 2, when installation, the hexagonal on the top spring cavity 6-2 is grappled by spanner Shape carries out rotation installation, by the way that the external screw thread of spring cavity 6-2 outer wall is arranged in, is threaded in fuel feeding valve 6 in fuel feed hole 2； The setting of the hexagonal shape of spring cavity 6-2 outer wall, making the installation of fuel feeding valve 6 and shaft coupling ontology 3, the operation is more convenient, screw thread Connection improves the stability of connection, thereby reduces the probability for leading to oil leak because of the loosening of fuel feeding valve 6.

Internal screw thread is arranged in the intracavity sidewall of oiling chamber 6-1；When oiling, high-pressure oil pipe is threadedly coupled with oiling chamber 6-1, Keep oil injection operation more firm, avoids during oiling because maloperation causes high-pressure oil pipe to fall off.

The bottom end of the inner cavity of oiling chamber 6-1 is hemisphere face structure 6-7 towards protruding outside chamber；The shape of high-pressure oil pipe port, Size is identical as the oiling inner cavity chamber 6-1, and the round oil outlet diameter of high-pressure oil pipe port is less than oiling chamber 6-1 bottom end outlet Diameter, when oiling, high-pressure oil pipe is inserted into oiling chamber 6-1, the spherical surface outer wall and oiling chamber 6-1 of the oil outlet of high-pressure oil pipe The inner sidewall of bottom face hemisphere face structure 6-7 forms ball face sealing, avoids during oiling high pressure oil from high-pressure oil pipe and note The spilling of the interface of oil pocket 6-1；The bottom end of spring cavity 6-2 is hemisphere face structure 6-8, hemisphere face structure 6- towards protruding outside chamber 8 minimum point is provided with round outlet 6-9, because the diameter of oil-through-hole 13 is less than the diameter of spring cavity 6-2, that is to say and succeeds in reaching an agreement The diameter of oilhole 13 is less than the diameter of outlet 6-9, and the bottom shape of fuel feed hole 2 and the bottom shape of spring cavity 6-2 exactly match, When then installing fuel feeding valve 6, the upper port of outlet 6-9 and oil-through-hole 13 is concentric to be installed, and is used between fuel feeding valve 6 and fuel feed hole 2 It is threadedly coupled, tightens and be screwed behind the position of fuel feeding valve 6, the semi-spherical shape of the bottom end of hemisphere face structure 6-8 and fuel feed hole 2 Joint face form ball face sealing, avoid high pressure oil and overflowed from the interface of fuel feeding valve 6 and oil-through-hole 13；Hemisphere face structure The setting of 6-7 and hemisphere face structure 6-8 have used the hard seal form of ball face sealing, have improved sealing effect, saved sealing The use of part reduces the complexity of structure.

After the technical solution of the utility model, eliminates seal orifice, unloads oilhole, only retain a kind of fuel feed hole, add The structure for only needing to consider a kind of hole when work, reduces the requirement on machining accuracy of workpiece；The fuel feeding valve being arranged in pairs makes to infuse The effect of oil and overload protection reaches best；The setting of spin, it is good to the sealing effect of oil filler point, so that shaft coupling more safely may be used It leans on；Oiling chamber, spring cavity bottom face are set as hemisphere face structure, by the hard seal form of ball face sealing, without using in addition Sealing element, reduce integrally-built complexity, save in use process install, replace sealing element process；This is practical New structure is simple, and fabrication design is convenient, and requirement on machining accuracy is low, has simplified manufacturing procedure, is suitable for industrial application.

Claims (8)

1. a kind of safety coupling comprising shaft coupling ontology offers oil pocket, the shaft coupling in the shaft coupling body interior Device body exterior is socketed shearing ring, it is characterised in that: it further includes fuel feeding valve, and the fuel feeding valve is installed on the oil inlet of the oil pocket Hole, the fuel feeding valve include the oiling chamber of sequential communication, shearing pipe and spring cavity；Its lower end of spring press fitting in the spring cavity It is connected to the oil pocket in the bottom end of the hole wall of the fuel feed hole, the spring cavity, the upper end of the spring is pressed with spin, described Spin is located at the neck position of the shearing pipe, and the spin closes the outlet of the oiling chamber under the action of spring.

2. a kind of safety coupling according to claim 1, it is characterised in that: the fuel feeding valve is arranged in pairs in the shaft coupling On device ontology circumference, radially it is separated by 180 degree.

3. a kind of safety coupling according to claim 1, it is characterised in that: the neck of the shearing pipe is located at the shearing Opening on ring.

4. a kind of safety coupling according to claim 1, it is characterised in that: be located at described cut on the outer wall of the spring cavity The shape of the lower section of Pipe Cutting is hexagon.

5. a kind of safety coupling according to claim 1, it is characterised in that: spiral shell between the fuel feeding valve and the fuel feed hole Line connection.

6. a kind of safety coupling according to claim 1, it is characterised in that: the inner surface of the oiling chamber is flank.

7. a kind of safety coupling according to claim 1, it is characterised in that: the bottom end of the oiling chamber is towards protrusion outside chamber For hemisphere face structure.

8. a kind of safety coupling according to claim 1, it is characterised in that: the bottom end of the spring cavity is towards protrusion outside chamber For hemisphere face structure.