CN102797739A

CN102797739A - Mechanical push-pull flexible shaft

Info

Publication number: CN102797739A
Application number: CN201210318132XA
Authority: CN
Inventors: 黄永炜
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-09-01
Filing date: 2012-09-01
Publication date: 2012-11-28

Abstract

The invention relates to a mechanical push-pull flexible shaft, wherein the flexible shaft is provided with a flexible shaft core with a smooth surface; the surface of the flexible shaft core is wrapped by a layer of conduit; a plurality of arc-shaped ribs are distributed on the periphery of an inner hole of the conduit; a straight wire tube is arranged on the outer surface of the conduit; a spiral band protecting layer is arranged on the outer surface of the straight wire tube; the outer surface of the spiral band protecting layer is wrapped by a plastic layer; and a pipe joint, a guide sleeve, a push-pull rod and a sealing element are installed on two ends of the mechanical push-pull flexible shaft. With adoption of the mechanical push-pull flexible shaft provided by the invention, the contact area between the flexible shaft core and the inner surface of the conduit can be greatly reduced, the storage space of a lubricant can be increased and the lubrication conditions are improved to ensure that the friction resistance is smaller so as to obtain a higher load efficiency; the elastic deformation of a stress support point of the conduit is improved, and the fit clearance between the conduit and the flexible shaft core is guaranteed to be smaller so as to obtain a higher stroke efficiency; and because the rigidity of the flexible shaft core is stronger, the bearing capacity of the flexible shaft core is improved and the service life of the flexible shaft core is prolonged; and meanwhile, manufacturing processes are reduced and product cost is lowered.

Description

A kind of mechanical push-and-pull flexible axle

Technical field

The present invention relates to automobile, engineering machinery, agriculture and forestry machinery, ship machinery, be specifically related to a kind of mechanical push-and-pull flexible axle.

Background technique

Machinery push-and-pull flexible axle is mainly used in transmission power and displacement, and it can bending or 360 spend cut-through things transmission pulling force and thrusts more specifically, is widely used in change control system, engineering machinery, agriculture and forestry machinery and the ship machinery of automobile.In the prior art, the area of contact of the axle core of push-and-pull flexible axle and the internal surface of conduit is big, so frictional resistance is big; Make load efficiency low. be the resistance of reducing friction, have to strengthen gap between the two sometimes, but can make so long distance the axle core when bearing than high thrust; Meeting undulate in bushing pipe is crooked, has increased the friction of axle core and conduit on the contrary, and the axle core can destroy the lay configuration of self in the bending of thrust; Reduce the mechanical property of axle core, particularly the connection part with pull bar gathers bending force and shearing force, causes a core fracture; And idle stroke also can increase, and the travel efficiency step-down influences the correctness of mechanical handling.

For head it off; Generally in process of production, managing the conduit material through improving axle wicking surface degree of finish, preferred low frictional factor, effective method is to reduce area of contact and the load efficiency and the travel efficiency that the push-and-pull flexible axle is improved in the gap of the internal surface of flexible shaft core and conduit.

Chinese patent ZL 200620040359.2 discloses a kind of cable core that is used for the push-and-pull flexible axle; Chinese patent CN 101561010A then discloses the flexible axle that a kind of operating ship is used; These two patents openly are the phenomenons to load efficiency and travel efficiency, and to design a kind of inner sandwich layer be wire rope or comprise that the flat filament laminar surface has the plastic-coated-type pull cable core of several boss stripe clads to reduce the area of contact of the internal surface of cable core and pillar.This design can improve the load efficiency and the travel efficiency of push-and-pull flexible axle, but since the plastic-coated clad, the rigidity intensity of having cut down cable core; Thereby reduced the bearing capacity of cable core, when particularly the thrust direction stroke is big, because behind the cable core release pillar; That section is unsettled to the pull bar joint; Reciprocal push-and-pull action power makes the continuous bending deflection of cable core, gathers bending force and shearing force at the connection part with pull bar, causes a core fracture.

Summary of the invention

The objective of the invention is to solve deficiency of the prior art; Newly designed a kind of mechanical push-and-pull flexible axle; This machinery push-and-pull flexible axle can reduce the area of contact of the internal surface of flexible shaft core and conduit significantly, increases the space that lubricant oil stores, and improves lubricating condition; Make frictional resistance littler, obtain higher load efficiency; Can improve the resiliently deformable of the stressed strong point of conduit, and allow the matching gap of conduit and flexible shaft core littler, obtain higher travel efficiency; The flexible shaft core that same cross-sectional is amassed can improve bearing capacity and working life than plastic-coated-type pull cable core good rigidly, reduces manufacturing process, reduces product cost.

For realizing above-mentioned purpose, the technological scheme that the present invention adopts is: a kind of mechanical push-and-pull flexible axle, and this flexible axle has ganoid flexible shaft core; Said flexible shaft wicking surface is enclosed with conduit; Conduit endoporus periphery is laid with several camber muscle, and said catheter outer surface is provided with the raw silk rings pipe, and said raw silk rings tube outer surface is provided with the hurricane band protective layer; Said hurricane band protective layer outer surface is enclosed with plastic layer, and mechanical push-and-pull flexible axle two ends are equipped with pipe joint, guide sleeve, pull bar and Sealing.

Said flexible shaft core is pressed into through two band steel band bags by the wire rope of many root multi-layers Split Down again, make its integral body solid, higher diameter of axle dimensional accuracy is arranged, the surface is straight, smooth, better elastic, rigidity and flexibility are arranged.

Said conduit endoporus periphery is laid with several camber muscle; Be provided with the groove of storing lubricating oil between the adjacent camber muscle; The cambered surface of muscle and flexible shaft wicking surface are provided with gap movingly, reduce the area of contact of the internal surface of flexible shaft core and conduit significantly, improve lubricating condition.

The cambered surface and the flexible shaft wicking surface of several camber muscle of said conduit endoporus are provided with gap movingly, and many camber muscle of the endoporus of said conduit are even or unevenly spaced distribution.

The material of said conduit is plastics.

The material of said raw silk rings pipe is a steel wire, and the thickness of steel wire and quantity are confirmed according to external diameter and the bearing capacity of said mechanical push-and-pull flexible axle needs, the crooked flexibility of said conduit.

Said hurricane band protective layer is the band steel band, and hurricane band protective layer helical pitch is 9mm-13mm.

The material of said plastic layer is TUP thermoplastic poly peace ester elastomer rubber.

Moderate lubrication oil is arranged between the surface of said flexible shaft core and the internal surface of said conduit.

The two ends of described mechanical push-and-pull flexible axle are connected with guide sleeve through pipe joint; Be connected with pull bar in the guide sleeve; Guide sleeve play the guiding role to pull bar, and between guide sleeve and the pull bar, all be set with Sealing between guide sleeve and the pipe joint, Sealing plays the dustproof and waterproof effect.

Described pipe joint is connected through withholding riveted joint with mechanical push-and-pull flexible axle two ends.

Compared with prior art, substantive distinguishing features and the beneficial effect given prominence to of the present invention is:

1, owing to adopted conduit endoporus periphery to lay several camber muscle, can reduce the area of contact of the internal surface of flexible shaft core and conduit significantly;

2, owing to be provided with the groove of storing lubricating oil between the adjacent camber muscle, increase the storage area of lubricant oil, improve lubricating condition, make frictional resistance littler, obtain higher load efficiency;

3, because conduit endoporus periphery is laid with several camber muscle, can improve the resiliently deformable of the stressed strong point of conduit, and allow the matching gap of conduit and flexible shaft core littler, obtain higher travel efficiency;

4, the long-pending flexible shaft core of same cross-sectional can improve bearing capacity and working life than plastic-coated-type pull cable core good rigidly.

5, because the flexible shaft core without plastic-coated, has reduced manufacturing process, reduce product cost.

Description of drawings

Fig. 1 is the structural representation of the present invention's machinery push-and-pull flexible axle;

Fig. 2 is the schematic cross-section of the present invention's machinery push-and-pull flexible axle.

Be labeled as among the figure: flexible shaft core 1, conduit 2, raw silk rings pipe 3, hurricane band protective layer 4, plastic layer 5, pull bar 6, guide sleeve 7, the first Sealing 8-1, the second Sealing 8-2, pipe joint 9, camber muscle 10, groove 11.

Embodiment

Do further bright specifically below in conjunction with accompanying drawing and specific embodiment to technological scheme of the present invention.

Embodiment 1

A kind of mechanical push-and-pull flexible axle; This flexible axle has ganoid flexible shaft core 1, said flexible shaft core 1 surface parcel one deck conduit 2, and conduit 2 endoporus peripheries are laid with several camber muscle 10; Said conduit 2 outer surfaces are provided with raw silk rings pipe 3; Said raw silk rings pipe 3 outer surfaces have one deck hurricane band protective layer 4, and said hurricane band protective layer 4 outer surfaces wrap up a plastic layer 5, and the two ends of mechanical push-and-pull flexible axle are equipped with pipe joint 9, guide sleeve 7, pull bar 6, the first Sealing 8-1 and the second Sealing 8-2.

Said flexible shaft core 1 is pressed again through two band steel band bags by the wire rope of many root multi-layers Split Down and is made its integral body solid, and the surface is straight, smooth, and better elastic, rigidity and flexibility are arranged.

Said conduit 2 endoporus peripheries are laid with several camber muscle 10, can reduce the area of contact of the internal surface of flexible shaft core 1 and conduit 2 significantly, and the groove 11 of storing lubricating oil is arranged between the adjacent camber muscle of conduit 2 endoporus periphery, can improve lubricating condition.

Be provided with gap movingly between the cambered surface of several camber muscle that said conduit 2 endoporus periphery is laid and flexible shaft core 1 surface, several camber muscle that said conduit 2 endoporus periphery is laid are evenly or are unevenly spaced distribution, and the material of said conduit 2 is plastics.

The material of said raw silk rings pipe 3 is a steel wire, and the thickness of steel wire and quantity are according to the bearing capacity of the external diameter of said conduit 2 and said mechanical push-and-pull flexible axle needs, crooked flexible definite.

The material of said hurricane band protective layer 4 is the band steel band, and hurricane band protective layer helical pitch is 9mm-15mm.

The material of said plastic layer 5 is TUP thermoplastic poly peace ester elastomer rubber.

Moderate lubrication oil is arranged between the internal surface of the surface of said flexible shaft core 1 and said conduit 2.

The two ends of said mechanical push-and-pull flexible axle are connected with guide sleeve 7 through pipe joint 9; Be connected with pull bar 6 in the guide sleeve 7; 7 pairs of pull bars 6 of guide sleeve play the guiding role; Be set with between guide sleeve 7 and the pull bar 6 and be set with the first Sealing 8-1 between the second Sealing 8-2, guide sleeve 7 and the pipe joint 9, the first Sealing 8-1 and the second Sealing 8-2 play the dustproof and waterproof effect.

Described pipe joint 9 is connected through withholding riveted joint with mechanical push-and-pull flexible axle two ends.

Although above the preferred embodiments of the invention are described, above-mentioned specific embodiments only is used to explain the present invention, does not limit practical range of the present invention.Those skilled in the art under the situation that does not break away from the scope that aim of the present invention and claim protect, can also make other form under enlightenment of the present invention, these all belong to protection scope of the present invention.

Claims

1. a mechanical push-and-pull flexible axle is characterized in that, this flexible axle has ganoid flexible shaft core; Said flexible shaft wicking surface is enclosed with conduit; Conduit endoporus periphery is laid with several camber muscle, and said catheter outer surface is provided with the raw silk rings pipe, and said raw silk rings tube outer surface is provided with the hurricane band protective layer; Said hurricane band protective layer outer surface is enclosed with plastic layer, and mechanical push-and-pull flexible axle two ends are equipped with pipe joint, guide sleeve, pull bar and Sealing.

2. mechanical push-and-pull flexible axle as claimed in claim 1 is characterized in that, said flexible shaft core is pressed into through two band steel band bags by the wire rope of many root multi-layers Split Down again.

3. mechanical push-and-pull flexible axle as claimed in claim 1 is characterized in that, said conduit endoporus periphery is laid with several camber muscle, is provided with the groove of storing lubricating oil between the adjacent camber muscle, and the cambered surface of muscle and flexible shaft wicking surface are provided with gap movingly.

4. like claim 1 or 3 described mechanical push-and-pull flexible axles, it is characterized in that the cambered surface and the flexible shaft wicking surface of several camber muscle of said conduit endoporus are provided with gap movingly, many camber muscle of the endoporus of said conduit are even or unevenly spaced distribution.

5. mechanical push-and-pull flexible axle as claimed in claim 1 is characterized in that the material of said conduit is plastics.

6. mechanical push-and-pull flexible axle as claimed in claim 1 is characterized in that the material of said raw silk rings pipe is a steel wire.

7. mechanical push-and-pull flexible axle as claimed in claim 1 is characterized in that said hurricane band protective layer is the band steel band, and hurricane band protective layer helical pitch is 9mm-13mm.

8. mechanical push-and-pull flexible axle as claimed in claim 1 is characterized in that, the material of said plastic layer is TUP thermoplastic poly peace ester elastomer rubber.

9. mechanical push-and-pull flexible axle as claimed in claim 1 is characterized in that, the two ends of described mechanical push-and-pull flexible axle connect guide sleeve through pipe joint, are connected with pull bar in the guide sleeve, are set with Sealing between guide sleeve and the pull bar.

10. mechanical push-and-pull flexible axle according to claim 9 is characterized in that, described pipe joint is connected through withholding riveted joint with mechanical push-and-pull flexible axle two ends.