CN113086236B

CN113086236B - Foldable storage type multi-machine type universal traction rod

Info

Publication number: CN113086236B
Application number: CN202110639660.4A
Authority: CN
Inventors: 王崇; 余江; 李辉
Original assignee: Beijing Andawell Aviation Equipment Co Ltd
Current assignee: Beijing Andawell Aviation Equipment Co Ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2021-09-03
Anticipated expiration: 2041-06-09
Also published as: CN113086236A

Abstract

The invention discloses a foldable and retractable multi-model universal traction rod, which comprises a folding rod assembly and an opening and closing arm assembly; the folding rod assembly comprises a first folding rod, a second folding rod and a third folding rod which are sequentially hinged, a rear wheel shaft and a swing arm support are fixedly arranged at one end of the first folding rod, and trundles are arranged on the rear wheel shaft; one end of the third folding rod is provided with a traction ring and a hand traction rod; the opening and closing arm assembly comprises a limiting sliding sleeve and two swing arm mechanisms, wherein the limiting sliding sleeve is arranged on the first folding rod through a limiting sliding sleeve, the swing arm mechanisms comprise a front swing arm, a rear swing arm, a tension and compression rod and a side pull arm, one end of the front swing arm is hinged with a swing arm support, the other end of the front swing arm is hinged with the side pull arm, one end of the rear swing arm is hinged with a rear mounting hole of the swing arm support, the other end of the rear swing arm is hinged with a rear mounting hole of the side pull arm, one end of the tension and compression rod is hinged with the rear swing arm, and the other end of the tension and compression rod is hinged with the limiting sliding sleeve of the side pull arm; each side pull arm is provided with a traction clamping seat. The invention has convenient use and high universality.

Description

Foldable storage type multi-machine type universal traction rod

Technical Field

The invention relates to the technical field of aviation ground support, in particular to a foldable and retractable multi-machine type universal traction rod.

Background

The present helicopters equipped with three-point wheeled landing gear require ground traction equipment to carry out the transfer operation on the ground. A common and low-cost transfer mode provides transfer power for a manual tractor or a tractor with a traction tailstock and controls the traction direction; the traction rod is used as a tool for connecting and transmitting force between the traction power source and the helicopter. One end of the traction rod is pushed and pulled by hands or is connected to the tail seat of the tractor, and the other end of the traction rod is connected with a traction device on the helicopter body. The traction device on the helicopter body is in the form of a protruding airplane wheel shaft type, a traction hole seat type, an airplane wheel shaft pin hole type and the like, and the sequentially corresponding traction rod traction structure is in the form of a hook type, a pin shaft type, a telescopic pin type and the like.

The functional performance of the currently equipped tow-bar has the following drawbacks: (1) the tractor type traction machine is matched with a type of traction rod, and the traction rod is matched with the same type of traction rod to correspond to operation when a tractor pulls or a manual traction operation is carried out. The variety and the number of the traction rods are increased along with the variety of the helicopters, so that the use, the maintenance and the management cost of the traction rods are increased, particularly when multi-model cooperative operation is needed; (2) the foldable storage is not available, and the occupied storage space is large; (3) the secondary safety protection function after the safety pin of the tractor traction device fails does not exist, and potential safety hazards exist.

Disclosure of Invention

The invention aims to provide a foldable and retractable multi-model universal draw bar, which is used for solving the problems in the prior art and improving the usability and safety of the draw bar for a helicopter.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a foldable and retractable multi-model universal traction rod, which comprises a folding rod assembly and an opening and closing arm assembly; the folding rod assembly comprises a first folding rod, a second folding rod and a third folding rod which are sequentially hinged, a rear wheel shaft and a swing arm support are fixedly arranged at one end of the first folding rod, which is far away from the second folding rod, and trundles are arranged on the rear wheel shaft; a traction ring and a hand traction rod are arranged at one end of the third folding rod, which is far away from the second folding rod;

the opening and closing arm assembly comprises a limiting sliding sleeve and two swing arm mechanisms, wherein the limiting sliding sleeve is arranged on the first folding rod through a limiting sliding sleeve, the two swing arm mechanisms are respectively positioned on two sides of the first folding rod, each swing arm mechanism comprises a front swing arm, a rear swing arm, a pull rod and a side pull arm, an inner side mounting hole at one end of each front swing arm is hinged with a front mounting hole of a swing arm support, an outer side mounting hole at the other end of each front swing arm is hinged with a front mounting hole of the side pull arm, one end of each rear swing arm is hinged with a rear mounting hole of the swing arm support, the other end of each rear swing arm is hinged with a rear mounting hole of the side pull arm, one end of each pull rod is hinged with the rear swing arm, and the other end of each pull rod is hinged with the limiting sliding sleeve of the side pull arm; the front mounting hole of the swing arm support is closer to the end part of the first folding rod than the rear mounting hole of the swing arm support;

each side draw arm is provided with a traction clamping seat, and the traction clamping seat is provided with a traction clamping hook groove, a traction pin hole and a traction telescopic pin seat hole, wherein the traction clamping hook groove is used for being clamped with the protruding wheel shaft type traction device, the traction pin hole is used for installing a traction pin, and the traction telescopic pin seat hole is used for installing a traction telescopic pin.

Preferably, the second folding bar is hinged with the first folding bar through a folding hinge, and the third folding bar is hinged with the second folding bar through a folding hinge; the folding hinge comprises two movable fan blades and a hinge shaft, the two movable fan blades are rotationally connected through the hinge shaft, and the movable fan blades are fixedly arranged at the end parts of the first folding rod, the second folding rod or the third folding rod; the included angle of the hinge shafts of the two folding hinges is 60 degrees; a trundle storage support is arranged on the third folding rod; the middle parts of the second folding rod and the third folding rod are respectively provided with an opening-closing arm clamping plate fixing support, the opening-closing arm clamping plate fixing supports are used for installing an opening-closing arm receiving limiting clamping plate, and the opening-closing arm receiving limiting clamping plate is used for limiting the side pull arm; and an accessory fixing seat for storing the traction pin and the clamping seat opening limiting pull rod is fixedly arranged on the second folding rod.

Preferably, the traction hook groove is located at one end of the traction card holder, the other end of the traction card holder is fixedly connected with one end of a card holder transposition shaft, one end of the card holder transposition shaft, which is close to the traction card holder, is circumferentially provided with a plurality of card holder transposition indexing holes perpendicular to the axial direction of the card holder transposition shaft, the card holder transposition indexing holes are blind holes, the card holder transposition shaft penetrates through a card holder support shaft seat on the side draw arm, the card holder support shaft seat is provided with a positioning hole, and the positioning hole is connected with one of the card holder transposition indexing holes through a spring plunger pin;

the traction pin sequentially passes through the traction pin hole in one traction clamping seat, a traction hole seat type traction device on the machine body and the traction pin hole in the other traction clamping seat, and two tail ends of the traction pin are respectively provided with an annular pin for preventing the traction pin from falling out of the traction pin hole;

the traction clamping seat is further provided with a traction clamping hook lockpin mounting hole seat and a first groove located between the traction clamping hook lockpin mounting hole seat and the traction clamping hook groove, a mounting hole is formed in the traction clamping hook lockpin mounting hole seat, a through hole coaxial with the mounting hole is formed in the traction clamping hook groove, a clamping hook lockpin is inserted in the mounting hole and can be arranged along the mounting hole and slide along the through hole, an unlocking wrench located in the first groove is fixedly arranged on the clamping hook lockpin, a first pressure spring is sleeved on the unlocking wrench, the first groove is close to the end face of the traction clamping hook lockpin mounting hole seat, the other end of the first groove is abutted on the unlocking wrench, and the first pressure spring can push the unlocking wrench to be tightly attached to the other end face of the first groove.

Preferably, the traction telescopic pin comprises a telescopic pin body, a mandril, an end cover and a second pressure spring, the telescopic pin body is a stepped shaft, and the telescopic pin body is arranged in the traction telescopic pin base hole in a sliding manner;

the top rod is inserted into an axial blind hole in the top of the telescopic pin body, the axial blind hole is coaxial with the top rod, the top rod is coaxial with the telescopic pin body, a plurality of through holes perpendicular to the axial direction of the telescopic pin body are formed in the side wall of the telescopic pin body, a plurality of steel balls are arranged in the through holes, annular clamping grooves are formed in the inner wall of the traction telescopic pin seat hole corresponding to the through holes, annular grooves are formed in the side wall of the top rod corresponding to the through holes, the total length of the steel balls in the same through hole is larger than that of the through holes, the steel ball on the outermost side in the through hole can partially enter the annular clamping groove, and the steel ball on the innermost side in the through hole can partially enter the annular groove;

the top end of the second pressure spring is abutted with the bottom end of the ejector rod, and the bottom end of the second pressure spring is abutted with the bottom end of the axial blind hole; the end cover is fixedly arranged at the top end of the telescopic pin body, the top of the ejector rod penetrates through a central through hole of the end cover, and a shaft shoulder which is larger than the diameter of the central through hole and is positioned below the end cover is arranged at the top of the ejector rod; the outer diameter of the end cover is larger than the aperture of the top end of the traction telescopic pin boss hole.

Preferably, the limiting sliding sleeve comprises two side clamping plates and two clamping plates, the two side clamping plates are both positioned between the two clamping plates, the clamping plates are fixedly connected with the adjacent side clamping plates through bolts, and the two side clamping plates and the two clamping plates form a frame-shaped structure; each clamping plate is provided with a plurality of stepped holes, the outer holes of the stepped holes are threaded holes, the inner holes of the stepped holes are unthreaded holes, set screws are installed in the outer holes, and universal balls are arranged in the inner holes; the inner side of each side clamping plate is provided with a plurality of guide plates; the middle part of the side clamping plate and the middle part of the clamping plate are both provided with a bolt assembly pin hole, a plurality of positioning pin holes are uniformly formed in the rod body of the first folding rod along the axial direction corresponding to the bolt assembly pin holes, the limiting sliding sleeve is fixedly connected with the first folding rod through a bolt assembly, and the bolt assembly penetrates through the positioning pin holes and penetrates through the bolt assembly pin holes in the side clamping plate or the bolt assembly pin holes in the clamping plate;

the bolt assembly comprises a bolt body and a bolt locking plate, wherein an axial groove is formed in one end of the bolt body, the bolt locking plate is located in the axial groove, the axial groove is a through groove, a bolt locking plate shaft is arranged in the middle of the bolt locking plate in a penetrating mode, the bolt locking plate shaft is in running fit with the bolt locking plate, and two ends of the bolt locking plate shaft are fixedly connected with the bolt body respectively.

Preferably, a plurality of through holes are respectively formed in the two front swing arms, and the through holes in the two front swing arms correspond to one another; the cassette aperture stop link can pass two corresponding perforating holes, the cassette aperture stop link includes cassette aperture stop link and two sets up respectively the quick connector at cassette aperture stop link both ends.

Preferably, the folding leg assembly comprises a folding leg rod, a folding leg rod sliding sleeve pin shaft, a folding leg base and a third pressure spring, one end of the folding rod supporting leg rod is hinged with a folding supporting leg mounting seat arranged below one end of the first folding rod close to the second folding rod, the folding rod leg support base is fixedly arranged at the other end of the folding rod leg support, the folding rod leg support sliding sleeve and the third pressure spring are sleeved on the folding rod leg support, one end of the third pressure spring is abutted against the sliding sleeve of the leg support rod of the folding rod, the other end of the third pressure spring is abutted against the base of the leg support of the folding rod, the top of the folding rod leg support rod is provided with a through long groove, the side wall of the folding rod leg support rod sliding sleeve is provided with a pin shaft through hole, and a pin shaft of the folding rod leg support rod sliding sleeve penetrates through the pin shaft through hole and the through long groove; the folding leg mounting seat is provided with a transition fillet, the horizontal end and the vertical end of the transition fillet are respectively provided with a groove matched with the diameter of the folding rod leg rod sliding sleeve pin shaft, and the third pressure spring can drive the folding rod leg rod sliding sleeve pin shaft to be clamped in any one groove on the transition fillet.

Preferably, a folding latch mounting seat and a folding latch assembly are arranged at both ends of the second folding rod, the folding latch mounting seat is fixedly connected with the movable fan blade fixedly arranged on the second folding rod, the folding latch mounting seat and the hinge shaft are respectively positioned at both ends of the movable fan blade, the folding latch assembly comprises a folding latch body, a folding latch cam, a folding latch knock pin and a fourth pressure spring, two fisheye screws are in threaded connection with the folding latch body, fisheyes of the two fisheye screws are positioned at the same side of the folding latch body, and fisheyes of the two fisheye screws are connected with the folding latch mounting seat through rotating hinge shafts; one end of the folding lock catch body, which is far away from the folding lock catch mounting seat, is provided with a U-shaped groove, one end of the folding lock catch cam is positioned in the U-shaped groove and is rotationally connected with the folding lock catch body through a first pin shaft, the middle part of the folding lock catch body is provided with a stepped through hole, one end of the stepped through hole is communicated with the U-shaped groove, the other end of the stepped through hole is communicated with a shaft hole of the rotating pin shaft, and the top pin of the folding lock catch is slidably arranged in the stepped through hole; the folding lock catch top pin is a three-stage stepped shaft and is divided into a first-stage stepped shaft, a second-stage stepped shaft and a third-stage stepped shaft from one end to the other end; and the diameter of the first-stage step shaft is matched with the aperture of the through hole in the movable fan blade, the diameter of the second-stage step shaft is larger than that of the first-stage step shaft, the fourth pressure spring is sleeved on the top pin of the folding lock catch, a second pin shaft is arranged on the third-stage step shaft, one end of the fourth pressure spring is supported on the second pin shaft, the other end of the fourth pressure spring is supported on the step surface of the stepped through hole, and the second pin shaft is located at one side, away from the rotating pin shaft, of the fourth pressure spring.

Preferably, a folding rod tail end buckle assembly is further arranged at one end, far away from the second folding rod, of the first folding rod; folding rod tail end buckle assembly includes folding rod tail end buckle, folding rod tail end trip seat cover and folding rod tail end trip, folding rod tail end buckle is articulated through the shaft hole on folding rod tail end buckle axle and the folding rod tail end buckle mounting panel, folding rod tail end buckle mounting panel sets firmly on the first folding rod, folding rod tail end trip seat cover through folding rod tail end trip seat cover axle with folding rod tail end buckle is articulated, folding rod tail end trip one end be collude form, the other end and folding rod tail end trip seat cover threaded connection.

Compared with the prior art, the invention has the following technical effects:

the foldable and retractable multi-model universal traction rod is convenient to use and high in universality, and the usability and safety of the traction rod for the helicopter are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a first schematic structural view of a foldable multi-model universal drawbar according to the present invention;

FIG. 2 is a schematic structural view of a foldable multi-model universal drawbar according to the present invention;

FIG. 3 is a third schematic structural view of the foldable multi-model universal drawbar according to the present invention;

FIG. 4 is a schematic view of a folding rod assembly of the foldable multi-unit type universal drawbar according to the present invention;

FIG. 5 is a first schematic structural view of a first folding bar of the foldable multi-model universal drawbar according to the present invention;

FIG. 6 is a second schematic structural view of a first folding bar of the foldable multi-model universal drawbar according to the present invention;

fig. 7 is a schematic structural view of a second folding bar in the foldable multi-model universal drawbar according to the present invention;

fig. 8 is a first schematic structural view of a third folding bar in the foldable multi-model universal drawbar according to the present invention;

fig. 9 is a second schematic structural view of a third folding bar in the foldable multi-model universal drawbar according to the present invention;

fig. 10 is a first schematic structural view of an opening and closing arm assembly in the foldable multi-model universal drawbar according to the present invention;

FIG. 11 is a second schematic structural view of the retractable arm assembly of the foldable retractable multi-model universal drawbar according to the present invention;

FIG. 12 is a schematic structural view of a limiting sliding sleeve in the foldable multi-model universal drawbar according to the present invention;

fig. 13 is a first schematic structural view of a traction clamping seat in the foldable multi-machine type universal traction rod according to the present invention;

fig. 14 is a second schematic structural view of a traction clamping seat in the foldable multi-machine type universal traction rod according to the present invention;

FIG. 15 is a cross-sectional view of the foldable lever latch assembly of the foldable retractable type multi-model universal drawbar according to the present invention when retracted;

fig. 16 is a schematic structural view of a drawbar ring in the collapsible multi-unit type universal drawbar according to the present invention;

FIG. 17 is a schematic view of the structure of the hand-pulling rod of the foldable multi-unit type universal drawbar according to the present invention;

FIG. 18 is a schematic view of the folding bar receiving leg assembly of the foldable receiving type multi-machine type universal drawbar according to the present invention;

FIG. 19 is a schematic view of the structure of the tail end buckle assembly of the folding rod of the foldable multi-model universal drawbar according to the present invention;

fig. 20 is a first partial schematic view of the foldable multi-unit type universal drawbar according to the present invention;

fig. 21 is a fourth schematic structural view of the foldable multi-model universal drawbar according to the present invention;

fig. 22 is a partial schematic structural view of a foldable multi-model universal drawbar according to the invention;

fig. 23 is a schematic structural view of a chuck opening degree limiting pull rod in the foldable multi-machine type universal tow rod according to the present invention;

fig. 24 is a third schematic view of a part of the foldable multi-model universal drawbar according to the present invention;

FIG. 25 is a schematic view showing the construction of a universal wheel assembly in the foldable retractable type multi-machine type universal drawbar according to the present invention;

fig. 26 is a partial schematic structural view of the foldable multi-unit type universal drawbar according to the present invention;

fig. 27 is a fifth partial schematic structural view of the foldable multi-model universal drawbar according to the present invention;

wherein, 100, foldable and retractable multi-model universal draw bar; 1000. drawing the clamping seat; 1011. a cassette indexing shaft; 1012. a traction hook groove; 1013. a traction pin hole; 1014. a traction telescopic pin base hole; 1015. a traction hook lock pin mounting hole seat; 1016. the seat transposition index hole; 1021. a hook lock pin; 1022. unlocking the wrench; 1023. a first pressure spring; 1030. pulling the telescopic pin; 1031. a retractable pin body; 1032. a top rod; 1033. an end cap; 1034. steel balls; 1035. a second pressure spring; 1040. a slotted nut; 1050. a cotter pin;

2000. an opening and closing arm assembly; 2010. a front swing arm; 2020. a rear swing arm; 2030. pulling the pressing rod assembly; 2031. pulling and pressing the rod; 2032. a ball head; 2040. a side pull arm; 2042. the clamping seat supports the shaft seat; 2050. a limiting sliding sleeve; 2051. a side clamping plate; 2052. clamping a plate; 2053. a guide plate; 2054. tightening the screw; 2055. a universal ball; 2060. a latch assembly; 2061. a plug pin body; 2062. a bolt locking plate; 2063. a latch blade shaft; 2070. an opening and closing arm pin shaft; 2080. a spring plunger pin;

3000. a folding bar assembly; 3010. a first folding bar; 3011. a first folding bar body; 3012. a swing arm support; 3013. a side clamping plate pin hole sleeve; 3014. the tail end of the folding rod is buckled with the mounting plate; 3015. a folding rod leg mounting seat; 3016. a rear wheel axle; 3017. a movable fan blade; 3020. a second folding bar; 3021. a second folding bar body; 3022. the opening and closing arm clamping plate fixing support; 3023. an accessory fixing seat; 3028. a folding latch mounting seat; 3030. a third folding bar; 3032. a traction ring end cap mounting seat; 3033. a universal wheel mounting base; 3034. the universal wheel accommodating support; 3035. a hand-pulling rod mounting seat; 3036. the hand traction rod is used for accommodating the clamp seat; 3037. a handrail; 3038. the hand traction rod is accommodated in the clamping column fixing seat; 3040. a folding bar latch assembly; 3041. folding the lock catch body; 3042. folding the latch cam; 3043. folding the latch knock pin; 3044. a first pin shaft; 3045. a fisheye screw; 3046. a second pin shaft; 3047. a fourth pressure spring; 3048. rotating the pin shaft; 3050. a caster wheel;

4000. a traction ring; 4010. a traction ring welding assembly; 4020. a traction ring pull rod welding assembly; 4030. a traction ring end cap; 4040. a screw; 4050. a shear pin; 4060. a secondary protection safety pin; 4070. a mechanical pulling resistance push ring; 4080. a mechanical traction damping block; 4090. a bolt;

5000. a hand-pulling rod; 5010. a hand-pulling rod body; 5011. a hand-pulling rod receiving hole site; 5012. a hand-pulling rod locking pin hole; 5020. a first quick pin;

6010. a tow pin; 6020. an annular pin; 6030. the opening degree of the clamping seat is limited by a pull rod; 6031. the opening limiting rod of the clamping seat; 6032. a quick connector; 6040. the folding rod tail end is buckled with the assembly; 6041. the tail end of the folding rod is buckled; 6042. the tail end of the folding rod is buckled with a shaft; 6043. the tail end of the folding rod is clamped with a hook; 6044. the tail end of the folding rod is clamped with a hook seat sleeve; 6045. the tail end of the folding rod is provided with a clamping hook seat sleeve shaft; 6046. a hook rubber sleeve; 6047. carrying out female backing; 6050. a folding rod rubber clamping seat; 6060. the folding rod receives the supporting leg assembly; 6061. a folding-lever leg lever; 6062. folding rod leg rod sliding sleeves; 6063. a folding rod leg rod sliding sleeve pin shaft; 6064. a folding rod leg base; 6065. a third pressure spring; 6071. the hand-pulling rod is blocked; 6072. clamping; 6073. the hand-pulling rod is used for accommodating the clamping column; 6080. the traction pin is accommodated in the clamping seat; 6090. a spring plunger; 6100. a universal caster assembly; 6101. a universal wheel support; 6102. a universal wheel; 6103. a second quick pin; 6110. spacing cardboard is accomodate to arm that opens and shuts.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1 to 27: the embodiment provides a foldable and retractable multi-machine type universal traction rod 100, which comprises a folding rod assembly 3000, an opening and closing arm assembly 2000, a traction clamping seat 1000, a traction ring 4000, a hand traction rod 5000 and accessories.

The foldable multi-model universal drawbar 100 of this embodiment is provided with two bilaterally symmetric drawbar sockets 1000. The tail end of the traction clamping seat 1000 is provided with a traction clamping hook groove 1012, and the traction clamping hook groove 1012 is used for being clamped on a shaft type traction device protruding out of the helicopter on the helicopter body so as to realize the connection of a traction rod and the helicopter. A traction hook lock pin mounting hole seat 1015 is arranged at the opening of the traction hook groove 1012, the traction hook lock pin mounting hole seat 1015 is of a lower groove-shaped structure, and coaxial shaft holes are arranged at the front end and the rear end of the lower groove and used for mounting a traction hook lock pin assembly. The coaxial shaft holes at the front end and the rear end of the lower groove are all backwards penetrated through the traction hook groove 1012; the middle front portion of the traction clamp seat 1000 is provided with a traction pin hole 1013. Referring to fig. 26, the draw pin 6010 is inserted through the left draw pin hole 1013, the upper draw hole seat type draw unit of the machine body, and the right draw pin hole 1013 by the rotation fit of the cassette rotation shaft 1011, so that the draw bar is connected with the upper draw hole seat type draw unit of the machine body. Threading the ring pin 6020 into the end of the kingpin 6010 may be accomplished to prevent the kingpin 6010 from backing out of the kingpin bore 1013.

A traction extension pin seat hole 1014 is formed in the middle rear part of the traction clamping seat 1000 and used for installing a traction extension pin 1030. And the traction rod is connected with the wheel axle pin hole type traction device on the machine body through a traction telescopic pin 1030. The traction telescopic pin seat hole 1014 is of a stepped cylindrical cavity structure, the diameter of the upper stepped cylinder is the smallest, and the limit limiting function that the traction telescopic pin 1030 moves up and down along the axial direction of the traction telescopic pin seat hole 1014 is provided; the cylindrical hole with the lower end step is matched with the telescopic pin body 1031, so that the telescopic pin body 1031 moves up and down along the hole wall; the wall of the cylindrical hole of the lower end step is provided with an annular clamping groove, when the steel ball 1034 is positioned in the annular clamping groove and is ejected out of the telescopic pin body 1031 by the ejector rod 1032, the position of the traction telescopic pin 1030 is locked, and at the moment, the traction telescopic pin 1030 cannot move up and down relative to the traction telescopic pin seat hole 1014.

The cassette indexing shaft 1011 is arranged at the rear of the traction cassette 1000, the rear of the cassette indexing shaft 1011 is provided with an external thread matched with the slotted nut 1040 and a pin hole matched with the split pin 1050, and the traction cassette 1000 is mounted on the cassette support shaft seat 2042 of the side pull arm 2040 through the slotted nut 1040 and the split pin 1050. Specifically, referring to fig. 22, one end of the cassette indexing shaft 1011, which is far from the traction hook groove 1012, extends into the cassette support shaft seat 2042 and passes through a through hole provided in the cassette support shaft seat 2042, while the slotted nut 1040 can prevent the cassette indexing shaft 1011 from passing through the through hole, while the split pin 1050 can prevent the slotted nut 1040 from loosening; a plurality of cassette transposition index holes 1016 vertical to the axis are formed in the cylindrical wall surface of the front part of the cassette transposition shaft 1011 and away from the end part by a certain length, the cassette transposition index holes 1016 are blind holes, and the cassette transposition index holes 1016 are matched with the spring plunger pins 2080, so that the traction cassette assembly is locked after transposition. The cassette indexing hole 1016 hole and spring plunger pin 2080 function as: according to practical application, the opening direction of the hook groove can form a certain included angle with the arrangement direction of the pin hole axis, so that the traction clamp seat assembly needs to be correspondingly rotated by a corresponding angle when the traction rod is used, and the traction structure of the traction rod is aligned with the traction device of a machine type to be towed.

A towing hook lock pin assembly: the hook lock pin 1021 is arranged in a lower groove of the traction hook lock pin mounting hole base 1015 and can move along the axis direction of the mounting hole; the unlocking wrench 1022 is shaped like a bolt and can be wrenched by a finger. The unlocking wrench 1022 is fixedly connected with the hook lock pin 1021 as a whole, and the whole can synchronously move along the axis of the hole seat in the lower groove of the traction hook lock pin mounting hole seat 1015; the first pressure spring 1023 is sleeved on the hook lock pin 1021, one end of the first pressure spring 1023 is in end surface contact with the lower groove of the mounting hole seat 1015 of the traction hook lock pin, the other end of the first pressure spring is in end surface contact with the unlocking wrench 1022, and continuous back pressure is provided, so that the unlocking wrench 1022 is in end surface contact with the other end surface of the lower groove of the mounting hole seat 1015 of the traction hook lock pin under the condition that the unlocking wrench 1022 is not touched by hands. At the moment, the hook lock pin 1021 is in an extending state, the opening of the traction hook groove 1012 is sealed, and after the hook type traction hanging is prevented, the traction hook groove 1012 is separated from a traction device of a tractor type in an unexpected situation, so that the safety protection effect is realized; an operator pulls the unlocking wrench 1022 in the compression direction of the first pressure spring 1023 to drive the hook lock pin 1021 to retract, the traction hook groove 1012 is unsealed, and at the moment, the operator can disconnect or mount the traction hook groove 1012 and a traction device of a tractor type.

Traction telescopic pin 1030: the telescopic pin body 1031 is in a stepped shaft shape, and the lower shaft diameter and the shaft length are matched with the pin holes of the wheel shaft pin hole type traction device on the machine body, so that the lower shaft diameter and the shaft length of the telescopic pin body 1031 respectively arranged on the left and right sides of the traction clamping seat 1000 can be different; the middle part is a secondary stepped shaft, the lower stepped shaft is matched with the aperture of a stepped hole at the lower end of the traction telescopic pin 1030 seat, and the upper stepped shaft is matched with the aperture of a cylindrical hole at the upper end of the traction telescopic pin 1030 seat; the upper shaft diameter is provided with an external thread matched with the end cover 1033 and used for fixedly connecting the telescopic pin body 1031 and the end cover 1033; the shaft center of the telescopic pin body 1031 is provided with a downward blind hole, the periphery close to the hole bottom is provided with through holes vertical to the shaft center, the through holes of the telescopic pin body 1031 penetrate through the position of the telescopic pin body 1031 and are arranged on the surface of a middle lower stepped shaft, and a plurality of steel balls 1034 are arranged in the through holes of the telescopic pin body 1031; a mandril 1032 is arranged in the blind hole of the axis; a second pressure spring 1035 is arranged at the bottom of the blind hole of the axis; the lower end of the second pressure spring 1035 contacts the bottom of the blind hole of the axis, and the upper end contacts the lower end face of the ejector rod 1032, so that upward thrust is provided for the ejector rod 1032. In the non-operating state, the stem 1032 is pushed up to the shoulder of the stepped shaft at the upper end of the stem to contact the end face of the axial through hole of the end cap 1033. At this moment, the rod body of the top rod 1032 plugs up a through hole in the inner wall of the axle center blind hole of the telescopic pin body 1031, so that the steel ball 1034 is forced to protrude out of the outer cylindrical wall of the telescopic pin body 1031 and enter the annular clamping groove of the traction telescopic pin seat hole 1014, the position of the traction telescopic pin 1030 is locked, and the traction telescopic pin 1030 cannot move up and down relative to the traction telescopic pin seat hole 1014.

The end cap 1033 has a hat-shaped structure with edges; the axis is upwards provided with a non-through internal thread matched with the diameter thread of the upper shaft of the telescopic pin body 1031; the axis is provided with a through small hole, and the aperture is smaller than the outer diameter of the post rod 1032; the outer diameter of the edge of the end cover 1033 is larger than the diameter of the step cylinder at the upper end of the traction telescopic pin 1030 base, so that the telescopic pin assembly moves downwards until the edge of the end cover 1033 is contacted with the upper end surface of the traction telescopic pin base 1014, and the continuous downward movement is limited.

The upper end of the post rod 1032 is provided with a stepped shaft with a specific length, and the outer diameter of the stepped shaft is smaller than the diameter of the through small hole at the axle center of the end cover 1033; the lower end of the post rod 1032 is provided with an annular groove. When an operator overcomes the back pressure of the second pressure spring 1035, the top rod 1032 is pressed downwards at the end part of the top rod 1032 until the second pressure spring 1035 is compressed to a certain degree, and the annular groove arranged at the lower end of the rod body of the top rod 1032 is aligned with the through hole position of the inner wall of the shaft center blind hole of the telescopic pin body 1031. At this time, the steel ball 1034 protruding out of the outer cylindrical wall of the telescopic pin body 1031 can be pushed and pushed into the outer cylindrical wall of the telescopic pin body 1031 by the edge of the annular clamping groove arranged on the cylindrical hole wall of the lower step of the telescopic pin seat hole 1014 when the telescopic pin 1030 is pulled and moved up/down, so that the position unlocking and the telescopic movement of the telescopic pin 1030 are realized.

The telescopic moving function and the locking/unlocking limiting function of the traction telescopic pin 1030 are used for meeting the connection requirement of a traction rod and an airplane wheel shaft pin hole type traction device on a machine body: retracting the telescopic pin body 1031 before docking so that the telescopic pin body 1031 is aligned with the wheel pin hole; when in butt joint, the telescopic pin body 1031 extends out and is inserted into the wheel axle pin hole; after docking, the telescopic pin body 1031 is locked at the extending position, so that the traction rod is prevented from being separated from the towed helicopter in the towing operation process; the retracted state of the drawbar locks the telescopic pin body 1031 in the retracted state.

The front swing arm 2010 is of a rod-shaped structure, mounting holes are formed in two ends of the front swing arm 2010, the inner side mounting hole of the front swing arm 2010 is hinged in the front mounting hole of the swing arm support 3012, and the outer side mounting hole of the front swing arm 2010 is hinged in the front mounting hole of the side pull arm 2040; the rod body section of the front swing arm 2010 is in an I shape, a plurality of groups of through holes are formed in the upper wing surface and the lower wing surface of the I shape and used for corresponding to different machine types, after the opening degree of a traction clamping seat assembly connected with the opening-closing arm assembly 2000 is adjusted, a clamping seat opening degree limiting pull rod 6030 penetrates through the through holes of the left front swing arm 2010 and the right front swing arm 2010 and is used for reinforcing the overall stability of the mechanism. The cassette opening limit pull rod 6030 includes a cassette opening limit rod 6031 and two quick-connect plugs 6032 respectively disposed at two ends of the cassette opening limit rod 6031, referring to fig. 26, and when in use, the quick-connect plugs 6032 at two ends of the cassette opening limit pull rod 6030 are respectively connected to the through holes of the left and right front swing arms 2010.

The rear swing arm 2020 is of a rod-shaped structure, mounting holes are formed in two end heads of the rear swing arm 2020, the inner side mounting hole of the rear swing arm 2020 is hinged in the rear mounting hole of the swing arm support 3012 by using an opening and closing arm pin 2070, and the outer side mounting hole of the rear swing arm 2020 is hinged in the rear mounting hole of the side pull arm 2040; and a pull-press rod hinge hole is formed in the position, close to the outer side mounting hole, of the rear swing arm 2020.

Tension and compression bar assembly 2030: including the compression bar 2031, the compression bar 2031 both ends are equipped with the positive and negative screw thread that matches with bulb 2032, and bulb 2032 is installed respectively at compression bar 2031 both ends, and compression bar 2031 and bulb 2032 threaded connection, bulb 2032 are the standard component, and bulb 2032 tip has the hinge hole. The distance between the end bulbs 2032 of the tension and compression bar assembly 2030 may be adjusted by rotating the tension and compression bars 2031 relative to the end bulbs 2032. The tension and compression rod assembly 2030 is arranged in a tension and compression rod hinge hole of the rear swing arm 2020 through ball heads 2032 hinge holes at two ends of the tension and compression rod assembly, and one end of the tension and compression rod assembly is arranged in a front end hinge hole of the limiting sliding sleeve 2050 through a bolt.

Limiting sliding sleeve 2050: referring to fig. 12, the two side snap-gauge plates 2051 are fixedly connected with the two snap-gauge plates 2052 by bolts to form a frame-shaped structure, and the frame-shaped structure is sleeved on the first folding rod body 3011. Step holes are uniformly distributed on the clamping plate 2052, an outer hole is a threaded hole, an inner hole is a unthreaded hole, a set screw 2054 is arranged in the outer hole, a universal ball 2055 is arranged in the inner hole, and the gap between the universal ball 2055 and the first folding rod body 3011 is adjusted by adjusting the screwing depth of the set screw 2054, so that the limiting sliding sleeve 2050 and the first folding rod body 3011 have higher coaxiality, and the limiting sliding sleeve 2050 smoothly slides along the outer wall of the first folding rod body 3011; the middle parts of the side clamping plates 2051 and the clamping plates 2052 are provided with pin holes of the bolt assemblies 2060, and the bolt assemblies 2060 are inserted into different pin holes under different working conditions. The guide plate 2053 plays an auxiliary guiding role in the process that the limiting sliding sleeve 2050 slides along the outer wall of the first folding rod body 3011 to align the pin holes with the side clamping plate pin hole sleeves 3013.

Bolt assembly 2060: when the pin hole on the limiting sliding sleeve 2050 is coaxial with the side clamping plate pin hole sleeve 3013 on the first folding rod 3010, the plug pin assembly 2060 is inserted, so that the opening and closing arm assembly 2000 and the traction clamping seat assembly related to the opening and closing arm assembly are locked at the working position and the accommodating position. The latch blade 2062 is provided with a long circular groove and is sleeved on the latch blade shaft 2063. A latch plate shaft 2063 is provided at an axially slotted end of the latch body 2061, the latch plate shaft 2063 is perpendicular to the latch body 2061 and passes through the axially slotted end of the latch body 2061, and the latch plate 2062 is disposed in the axially slotted end of the latch body 2061. When the bolt lock shaft 2063 is horizontal and penetrates into the bolt assembly 2060, the end of the bolt body 2061 and the bolt lock 2062 penetrate out of the pin hole, at the moment, under the action of self weight, the bolt lock 2062 turns around the bolt lock shaft 2063 by a certain angle, so that the bolt lock 2062 blocks the pin hole, and the problem of use safety caused by the fact that the bolt assembly 2060 is not manually separated from the pin hole is solved.

The first folding rod 3010, the second folding rod 3020 and the third folding rod 3030 are hinged by using folding hinges arranged at the respective rod ends, each folding hinge comprises two movable fan blades 3017 and a hinge shaft, the two movable fan blades 3017 in the same folding hinge are respectively fixedly connected with the ends of different folding rods, and the two movable fan blades 3017 in the same folding hinge are rotationally connected through the hinge shafts; the arrangement included angle of the hinge shafts is 60 degrees. When the first folding rod 3010, the second folding rod 3020, and the third folding rod 3030 are unfolded to be coaxial, the folding rod locking assembly 3040 is used to achieve locking.

First folding bar 3010: a folding rod tail end buckle mounting plate 3014 is arranged on the tail end face of the first folding rod 3010, and a folding rod tail end buckle assembly 6040 is mounted in a hinge shaft hole of the folding rod tail end buckle mounting plate 3014 through a hinge shaft; a swing arm support 3012 is arranged at the tail end of the first folding rod 3010, and the front swing arm 2010 and the rear swing arm 2020 are mounted in a hole of the swing arm support 3012 through a hinge shaft. The lower part of the tail end of the pipe body is provided with a rear wheel shaft 3016 for mounting a caster 3050 to realize the movement of the traction rod assembly in a working/storage state; a horizontally or vertically arranged side clamping plate pin hole sleeve 3013 penetrating through the tube body is arranged in the middle of the tube body of the first folding rod 3010 and is vertical to the tube body according to a specific size, and is used for locking the limiting sliding sleeve 2050 in the side clamping plate pin hole sleeve 3013 of the tube body of the first folding rod 3010 through an applicable bolt assembly 2060, so that the fixing of the limiting sliding sleeve 2050 is realized, and further the opening locking of the opening and closing arm assembly 2000 and the opening locking of the two traction clamping seats 1000 are realized; a folding rod supporting leg mounting seat 3015 is arranged at the lower part of the front end of the tube body of the first folding rod 3010 and used for mounting a folding rod storage supporting leg assembly 6060, so that the front part of the traction rod assembly is supported when the traction rod is in a storage state (the rear part of the traction rod is supported by a caster 3050); the movable fan blades 3017 on the front end surface of the first folding rod 3010 and the movable fan blades 3017 on the rear end surface of the second folding rod 3020 are in rotating fit through a hinge shaft, so that the first folding rod 3010 and the second folding rod 3020 are hinged.

Second folding bar 3020: an opening-closing arm clamping plate fixing support 3022 is arranged in the middle of the pipe body of the second folding rod 3020 and used for fixing the position of the opposite side pull arm 2040 in the accommodating state of the traction rod assembly and preventing the opening of the traction rod assembly to the two sides of the pipe body of the folding rod. The second folding rod 3020 is provided with an accessory fixing seat 3023 for providing fixed storage for the towing pin 6010 and the cassette opening degree limiting pull rod 6030 when not in use; the front and rear end faces of the second folding rod 3020 are provided with movable blades 3017 and a folding latch mounting base 3028 for realizing the hinge connection with the first folding rod 3010 and the third folding rod 3030. The folding latch mounting seat 3028 is used to mount the folding lever latch assembly 3040, and to achieve the fixing function of the folding lever latch assembly 3040 in the state of folding and storing the drawbar assembly, and to prevent the folding lever latch assembly from swinging around the shaft. The folding bar locking assembly 3040 cooperates with the folding locking mounting base 3028 and the attached movable fan blades 3017 of the two adjacent folding bar welding assemblies to realize the fixation of the two adjacent folding bar welding assemblies when they are unfolded and in a coaxial state.

Third folding bar 3030: a movable fan blade 3017 is arranged on the rear end face of the third folding rod 3030, the movable fan blade 3017 on the rear end face of the third folding rod 3030 is rotatably connected with the movable fan blade on the front end face of the second folding rod 3020 through a hinge shaft, so that the third folding rod 3030 is hinged with the second folding rod 3020; an opening-closing arm clamping plate fixing support 3022 is arranged in the middle of the pipe body of the third folding rod 3030 and is used for fixing the position of the side pull arm 2040 in the storage state of the traction rod assembly and preventing the side pull arm from opening towards the two sides of the pipe body of the folding rod; two hand-pulling rod receiving clamping column fixing seats 3038 which are separated by a specific distance are arranged in the middle of the tube body of the third folding rod 3030, and a hand-pulling rod receiving clamp seat 3036 is arranged at the rear end part close to the tube body and used for installing a hand-pulling rod receiving mechanism assembly to realize the receiving of the hand-pulling rod 5000 when the hand-pulling rod is not used; the front end face of the tube body of the third folding rod 3030 is provided with a traction ring end cover mounting seat 3032 for limiting the traction ring 4000 and preventing the traction ring from being separated outwards. The front end face of the tube body of the third folding rod 3030 is upwards provided with a hand-pulling rod mounting seat 3035, the part of the hand-pulling rod mounting seat 3035 in matched connection with the hand-pulling rod 5000 is cylindrical, and a through hole is formed in the vertical cylindrical surface and used for mounting a first quick pin 5020. When the hand is in a hand pulling state, the lower vertical pipe of the hand pulling rod body 5010 is inserted into the hand pulling rod mounting seat 3035, the hand pulling rod lockpin hole 5012 is aligned with the through hole of the hand pulling rod mounting seat 3035, and then the first quick pin 5020 penetrates through the through hole, so that the hand pulling rod body 5010 is fixedly connected with the third folding rod 3030; a handrail 3037 is horizontally arranged on the tube body of the third folding rod 3030 close to the front end face, so that an operator can carry the hand for use when connecting the traction rod with a tractor; the front end surface of the tube body of the third folding rod 3030 is provided with a universal wheel mounting base 3033 downwards for mounting a universal caster wheel assembly 6100. A through pin hole is formed in the universal wheel mounting seat 3033 in parallel with the folding rod tube body and used for inserting a second quick pin 6103, a universal caster support 6101 is fixed on the universal wheel mounting seat 3033, and a universal wheel 6102 is arranged on the universal caster support 6101; a universal wheel receiving support 3034 is horizontally arranged on the tube body of the third folding rod 3030 near the front end face, and is used for receiving and fixing a universal caster wheel component 6100 on the third folding rod 3030 when the traction rod assembly is received and the traction rod is in a traction state by using a tractor.

The folding bar locking assembly 3040 is used to realize that the movable fan blades 3017 of two adjacent folding bars are locked in a limited manner by using the folding bar locking assembly 3040 after the three folding bars are unfolded along the movable fan blades 3017, so as to associate the three folding bars into a coaxial whole. Ensuring that the folding bar assembly 3000 as a coaxial whole is subjected to the operational tension and compression forces.

The fisheye screw 3045 is a standard component with a ring at the end. The rotating pin 3048 mounts two fisheye screws 3045 on the folding latch mount 3028 through a circular hole. The screw end of the fisheye screw 3045 fits into the threaded hole of the folding latch body 3041. The folding lock catch top pin 3043 is a stepped shaft, and one end of the folding lock catch top pin 3043 close to the movable fan blade 3017 is provided with a first-level short stepped shaft, the outer diameter of which is matched with the aperture of a through hole on the movable fan blade 3017; the remaining two-stage stepped shafts are matched with stepped through holes of the folding lock catch body 3041, wherein a pin hole is formed in the middle of the third-stage stepped shaft, a second pin 3046 penetrates through the pin hole to be fixedly connected with a top pin 3043 of the folding lock catch, and a fourth pressure spring 3047 is sleeved on the third-stage stepped shaft. One end of the folding latch cam 3042 is provided with a hinge hole, and the thickness of the cam is matched with the width of the U-shaped groove of the folding latch body 3041. The other end of the folding latch is a cylindrical structure with a blind hole, and when the traction pin 6010 can be inserted into the blind hole, the force arm for pulling the folding latch cam 3042 around the hinge hole of the folding latch cam 3042 can be increased.

It should be noted that, a folding latch mounting seat 3028 is disposed on each movable blade 3017 at two ends of the second folding rod 3020, and the folding latch mounting seat 3028 is located at a side away from a joint surface between the movable blade 3017 and the other movable blade 3017, so as to prevent the folding latch mounting seat 3028 from hindering the joint of the two movable blades 3017.

The folding latch body 3041 provides mounting locations for other parts: two fisheye screw 3045 mounting threaded holes are symmetrically arranged; the symmetrical center plane is provided with a step through hole for mounting a folding lock catch top pin 3043 parallel to the mounting threaded hole of the fisheye screw 3045, and the folding lock catch top pin 3043 can perform telescopic motion in the step hole. A through groove is formed in the middle of the stepped through hole, one end of a fourth pressure spring 3047 is in surface contact with the through groove, and the other end of the fourth pressure spring 3047 is in contact with a second pin 3046 to provide a back pressure, so that a top pin 3043 of the folding lock catch fixedly connected with the second pin 3046 is pushed inwards into a folding lock catch body 3041; the hole on the center plane of symmetry and the vertical step through hole is provided with a rotating pin 3048 hole, and a U-shaped groove is provided to pass through the rotating pin 3048 hole and the step through hole. The folding latch cam 3042 is embedded in the U-shaped groove, and is hinged in a hole of a rotating pin 3048 of the folding latch body 3041 by the rotating pin 3048, the cam contacts with the end face of a third-stage stepped shaft of a top pin 3043 of the folding latch, and the folding latch cam 3042 is pulled to push the top pin 3043 of the folding latch out of the folding latch body 3041, so that the first-stage short stepped shaft at the end of the top pin 3043 of the folding latch penetrates into a through hole on the movable fan blade 3017 (to prevent the folding lever latch assembly 3040 from accidentally separating from the movable fan blade 3017 in a locked state, so that the three folding levers are no longer associated into a coaxial whole), and meanwhile, the end face of the second-stage stepped shaft of the top pin 3043 of the folding latch is pressed on the side face of the movable fan blade 3017, so as to realize that the movable fan blades 3017 belonging to adjacent folding levers are locked in a limited manner.

The folding lever latch assembly 3040 reversely pulls the folding latch cam 3042 when the draw bar is retracted, the folding latch cam 3042 releases the pushing force on the folding latch knock pin 3043, and the fourth pressure spring 3047 provides a back pressure force to push the folding latch knock pin 3043 fixedly connected to the second pin 3046 inward into the folding latch body 3041. The folding bar locking assembly 3040 is turned 180 degrees around the rotating shaft 3048 to the side of the folding locking mount 3028. By pulling the folding lock catch cam 3042, the cam can push the top pin 3043 of the folding lock catch out of the folding lock catch body 3041, and the end surface of the second step of the top pin 3043 of the folding lock catch is pressed against the side surface of the mounting seat 3028 of the folding lock catch, so as to fix the locking assembly 3040 of the folding rod when the locking assembly is stored. When the draw bar is unfolded, the folding latch cam 3042 is pulled, the folding latch cam 3042 releases the ejecting force on the folding latch knock pin 3043, and the fourth pressure spring 3047 provides a back pressure force, so that the folding latch knock pin 3043 fixedly connected with the second pin 3046 is pushed inwards into the folding latch body 3041. The folding bar lock catch assembly 3040 is pulled around the rotating pin 3048 to turn 180 degrees, and to the other side of the folding lock catch mounting seat 3028, the folding lock catch cam 3042 is pulled, which can make the folding lock catch top pin 3043 be ejected out of the folding lock catch body 3041, make the first-level short step shaft at the end of the folding lock catch top pin 3043 extend into the through hole on the other movable fan blade 3017 without the folding lock catch mounting seat 3028, and make the second-level step shaft end face of the folding lock catch top pin 3043 press the side face of the movable fan blade 3017, so as to realize that the movable fan blade 3017 belonging to the adjacent folding bar is locked by limit.

The pulling ring 4000 is installed at the inner front end of the third folding bar 3030. Wherein the mechanical traction pushing ring 4070 is fixedly connected with the third folding rod 3030 through a bolt 4090; a mechanical drag damping block 4080 is respectively sleeved on the front and the rear of the drag ring pull rod welding assembly 4020, and then the mechanical drag damping block 4080 is integrally penetrated into the third folding rod 3030 until the mechanical drag damping block 4070 is contacted. The mechanical traction damping block 4080 generates elastic deformation when being pressed, so that the traction ring welding assembly 4010 can buffer the body of the traction rod when being applied with pulling and pressing impact force; the traction ring end cover 4030 is fixedly connected to the front end face of the third folding rod 3030 through a screw 4040, so that when the traction ring welding assembly 4010 is pulled in operation, the traction ring pull rod welding assembly 4020 and the mechanical traction damping block 4080 form a whole which is separated from the inside of the third folding rod 3030; the traction ring welding assembly 4010 is fixedly connected with the traction ring pull rod welding assembly 4020 through a safety pin 4050 and a secondary protection safety pin 4060.

The caliber of a pull ring of the traction ring welding assembly 4010 is matched with a traction tailstock of an outfield tractor and a general automobile tail traction seat; at present, the applicable machine types are divided into a light type and a heavy type, and accordingly, the safety pin 4050 is correspondingly provided with two specifications of the light type and the heavy type. Based on the consideration of safety redundancy, a secondary protection safety pin 4060 is uniquely added, and the secondary protection safety pin 4060 is arranged in the anti-falling limiting sliding groove of the traction ring 4000.

The secondary protection safety pin 4060 uses the operating condition: under normal conditions, the secondary protection safety pin 4060 does not participate in working, when the safety pin 4050 used by the corresponding machine type is overloaded and broken, the traction vehicle continues to drive (push or pull) the traction ring 4000 to move for a certain distance relative to the traction rod body until the anti-falling limiting sliding groove of the traction ring welding assembly 4010 is contacted with the secondary protection safety pin 4060, and the secondary protection safety pin 4060 starts to be stressed.

The secondary protection safety pin 4060 is arranged according to the following principle: when the safety pin 4050 used by the corresponding machine type is overloaded and broken, if the secondary protection safety pin 4060 is not arranged, under the traction condition of the traction rod: the traction ring welding assembly 4010 is separated from the traction ring pull rod welding assembly 4020, so that the traction vehicle loses load and suddenly accelerates; when the traction rod body is pulled, the traction rod body is suddenly disconnected from the traction vehicle, the end part of the traction rod can be fallen to the ground and uncontrollably flapped, and the traction rod can be further damaged and the type of the traction vehicle and operators can be influenced. Under the prerequisite that sets up secondary protection safety pin 4060, above-mentioned influence safety condition can not appear, simultaneously when the safety pin 4050 that corresponds the model and use transships when breaking, traction vehicle continues to drive (push away or draw) and pull ring 4000 and move a section distance relative the traction lever body, until the spacing spout of anticreep of traction ring welding assembly 4010 and secondary protection safety pin 4060 contact. The moment from the breakage of the safety pin 4050 to the contact of the anti-falling limit sliding groove and the secondary protection safety pin 4060 can generate vibration and sound, so that an operator is prompted to have problems in traction operation, and the problem reason is immediately checked. After the problem is solved, the secondary protection safety pin 4060 can be used for completing the traction operation.

The hand-pulling rod body 5010 is T-shaped, the cross rod at the upper end is held by operators in a handheld mode, the lower portion of the hand-pulling rod body is a vertical tube, the vertical tube is perpendicular to the side wall of the vertical tube, and a through hand-pulling rod containing hole 5011 and a hand-pulling rod locking pin hole 5012 are arranged according to specific sizes. When the hand lever body 5010 is retracted, the hand lever housing hole 5011 is retracted. Function of the towing pin 6010: and (3) passing the traction pin 6010 through the left traction pin hole 1013, the traction hole seat type traction device on the machine body and the right traction pin hole 1013 to realize the connection of the traction rod and the traction hole seat type traction device on the machine body. The penetration of the ring pin 6020 into the end of the kingpin 6010 may be accomplished to prevent the kingpin 6010 from backing out of the kingpin bore 1013; the tow pin 6010 is used as a crowbar. The end of the towing pin 6010 is held by hand, inserted into a lower end hole of a folding rod tail end buckle 6041, and the towing pin 6010 is pried up and down, so that the locking and unlocking of the folding rod tail end buckle assembly 6040 can be realized, and further the locking and unlocking of the storage state of the traction rod assembly can be realized.

The cassette aperture limit pull rod 6030 acts: the opening degree limiting pull rod 6030 penetrates through the through hole positions of the left front swing arm 2010 and the right front swing arm 2010 after the opening degree of the traction clamping seat assembly connected with the opening-closing arm assembly 2000 is adjusted corresponding to different machine types, and the overall stability of the mechanism is enhanced.

Folding rod tail end buckle assembly 6040: the folding rod tail end clamping hook 6043 is a rod with a hook shape, the end part of the straight rod is provided with a thread matched with the folding rod tail end clamping hook seat sleeve 6044, the extending length size of the folding rod tail end clamping hook 6043 relative to the folding rod tail end clamping hook seat sleeve 6044 can be adjusted through adjusting the thread, the locking force of the folding rod tail end clamping hook assembly 6040 is adjusted, the back nut 6047 is in back tight threaded connection, the folding rod tail end clamping hook 6043 can be rotated after the back nut 6047 is loosened to adjust the length of the folding rod tail end clamping hook 6043 extending out of the folding rod tail end clamping hook seat sleeve 6044, the folding rod tail end clamping hook 6043 is locked with the folding rod tail end clamping hook seat sleeve 6044 after the back nut 6047 is screwed, and the folding rod tail end clamping hook 6043 can not be rotated relative to the folding rod tail end clamping hook seat sleeve 6044 any more; a folding rod tail end buckle 6041 is hinged on the corresponding shaft hole of the folding rod tail end buckle mounting plate 3014 on the tail end face of the first folding rod 3010 through a folding rod tail end buckle shaft 6042; the folding rod tail end clamping seat sleeve 6044 is hinged on the folding rod tail end clamping buckle 6041 through a folding rod tail end clamping seat sleeve shaft 6045. In the folding rod storage locking state, a clamping hook 6043 at the tail end of the folding rod is hooked at the end part of the hinge shaft of the movable fan blade 3017 of the second/third folding rod 3030; accomodate the locking state at the folding rod, the folding rod tail end buckle mounting panel 3014 corresponds the relative first folding rod 3010 tail end face's in shaft hole distance is greater than the relative first folding rod 3010 tail end face's of folding rod tail end trip seat sleeve shaft 6045 distance, folding rod tail end buckle 6041 can not the non-human factor open when just having guaranteed the locking state like this, causes the unexpected unblock condition. When the folding rod is unfolded, the traction rod is in a traction working state, and the clamping hook 6043 at the tail end of the folding rod tail end clamping assembly 6040 still needs to be in a locking position so as to prevent the folding rod from swinging outwards and causing potential safety hazards of contact interference with a tractor type structure. Therefore, the snap rubber sleeve 6046 is arranged on the snap 6043 at the tail end of the folding rod, and the opening of the upper end of the snap mounting plate 3014 at the tail end of the folding rod is designed to be smaller than the slot. When folding rod tail end trip 6043 was in the locking position, trip rubber sleeve 6046 was blocked by the upper end fluting of folding rod tail end buckle mounting panel 3014, and because the design of the upper end fluting opening of folding rod tail end buckle mounting panel 3014 is less than the fluting for trip rubber sleeve 6046 can not deviate from the upper end fluting of folding rod tail end buckle mounting panel 3014, has solved above-mentioned potential safety hazard promptly.

Folding rod accomodates landing leg assembly 6060: a folding rod leg support rod 6061 and a folding rod leg support base 6062 are in sliding sleeve with the folding rod leg support rod; 6064 fixedly connected into a whole; the folding rod leg support rod 6061 is hinged on the folding rod leg mounting seat 3015 through a hinge shaft at the upper end part; the upper part of the folding rod leg support 6061 is provided with a through long groove perpendicular to the rod body. Folding rod leg rod slide 6062 is coaxial with folding rod leg rod 6061. The side wall of the folding rod leg support rod sliding sleeve 6062 is provided with a matched through hole, and a folding rod leg support rod sliding sleeve pin 6063 penetrates through the through hole of the side wall of the folding rod leg support rod sliding sleeve 6062 and simultaneously penetrates through a through long groove of the upper vertical rod body of the folding rod leg support rod 6061, so that the folding rod leg support rod sliding sleeve 6062 can slide up and down along the folding rod leg support rod 6061 within the range of the through long groove of the upper vertical rod body of the folding rod leg support rod 6061. The length of the sliding sleeve pin shaft 6063 of the folding rod support leg rod is equal to the width of the folding rod support leg mounting seat 3015. A transition fillet is arranged on the folding rod leg mounting seat 3015, and grooves matched with the diameters of sliding sleeve pin shafts 6063 of the folding rod leg rods are arranged at two ends (namely, vertical positions and horizontal positions) of the transition fillet; the third pressure spring 6065 is coaxial with the folding rod leg support rod 6061 and is disposed between the folding rod leg support base 6064 and the folding rod leg support rod sliding sleeve 6062 to provide back pressure for the folding rod leg support rod sliding sleeve 6062, so that the folding rod leg support rod sliding sleeve 6062 and the folding rod leg support rod sliding sleeve pin 6063 are maintained at the upper end of the through slot of the vertical rod body at the upper part of the folding rod leg support rod 6061. Folding rod accomodates landing leg assembly 6060 operating condition: the folding rod leg support rod 6061 is in a vertical state, and a sliding sleeve pin shaft 6063 of the folding rod leg support rod is clamped in a groove in the vertical position of a transition fillet of the folding rod leg support mounting seat 3015; folding rod storage leg assembly 6060 storage state: the operator pushes down the folding leg bar sliding sleeve 6062 to disengage the pin 6063 of the folding leg bar sliding sleeve from the groove at the transition fillet horizontal position of the folding leg bar mounting base 3015. Then pull folding rod landing leg pole 6061 to be the horizontality (promptly with first folding rod 3010 axis parallel state), folding rod landing leg pole sliding sleeve round pin axle 6063 is under the backpressure of third pressure spring 6065, and the card is in the recess of the transition fillet horizontal position of folding rod landing leg mount pad 3015, accomplishes and accomodates the operation.

The arm that opens and shuts is accomodate spacing cardboard 6110 it is the cuboid structure, is M shape recess form along long limit section. The opening and closing arm storage limiting clamp plate 6110 is fixed on the opening and closing arm clamp plate fixing support 3022 in the middle of the tube bodies of the second folding rod 3020 and the third folding rod 3030. The draw bar assembly has the advantages that when the draw bar is in a storage state, the middle groove of the opening and closing arm storage limiting clamping plate 6110 is used for clamping the upper flanging of the side draw arm 2040, so that the position of the side draw arm 2040 is fixed in the storage state of the draw bar assembly, and the opening and closing arm assembly 2000 is prevented from opening towards two sides of the tube body of the first folding rod 3010.

The hand tow bar storage mechanism assembly realizes the storage of the hand tow bar body 5010. The hand tow bar storage plug 6071 is mounted on the clamp 6072 telescopic shaft, the clamp 6072 is standard, and the clamp 6072 is mounted on the hand tow bar storage clamp base 3036. The hand tow bar storage clamp column 6073 is mounted on the hand tow bar storage clamp column fixing base 3038. When the hand-pulling rod 5000 is retracted, the clamp 6072 is pulled, and the telescopic shaft drives the hand-pulling rod storage plug 6071 to retract towards the clamp 6072 body. The hand tow bar receiving hole 5011 of the hand tow bar body 5010 is aligned with the hand tow bar receiving clamping column 6073 and then inserted on the hand tow bar receiving clamping column 6073. The clamp 6072 is pulled reversely, so that the telescopic shaft drives the hand-pulling rod accommodating plug 6071 to extend out of the clamp 6072, the hand-pulling rod accommodating plug 6071 and the end part of the vertical pipe at the lower part of the hand-pulling rod body 5010 are enabled to provide continuous pressing force, and the accommodating and fixing of the hand-pulling rod body 5010 are achieved.

Two hand-pulling rod receiving clamping column fixing seats 3038 which are separated by a specific distance are arranged in the middle of the tube body of the third folding rod 3030, and a hand-pulling rod receiving clamp seat 3036 is arranged at the rear end part close to the tube body and used for installing a hand-pulling rod receiving mechanism assembly to realize the receiving of the hand-pulling rod 5000 when the hand-pulling rod is not used; the towing pin accommodating clamping seat 6080 is provided with a clamping groove, a threaded hole matched with the spring plunger 6090 is formed in the opening of the clamping groove, and the spring plunger 6090 is a standard component and can provide certain spring back pressure. When the towing pin 6010 is stored, the towing pin 6010 is clamped into the clamping groove of the towing pin storage clamping seat 6080, and the spring plunger 6090 can provide a certain back pressure for the towing pin 6010 to prevent the towing pin 6010 from being accidentally removed from the towing pin storage clamping seat 6080; the tow pin receiving cassette 6080 is provided with a through hole, and a spare safety pin 4050 and a secondary protection safety pin 4060 along with the tow bar can be installed in the through hole of the tow pin receiving cassette 6080 and locked by a cotter pin; the folding rod 3010 is further provided with a folding rod rubber clamping seat 6050, the folding rod rubber clamping seat 6050 is close to the end of the first folding rod 3010, namely, the end of the first folding rod 3010 far away from the second folding rod 3020, after the first folding rod 3010, the second folding rod 3020 and the third folding rod 3030 are folded together, the hand pulling rod 5000 stored on the hand pulling rod storing clamp seat 3036 can be just in contact with the folding rod rubber clamping seat 6050 on the first folding rod 3010, the folding rod rubber clamping seat 6050 has elasticity, and unnecessary abrasion caused by direct contact between the hand pulling rod 5000 and the outer wall of the first folding rod 3010 can be prevented.

In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "front", "back", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims

1. The utility model provides a general traction lever of collapsible formula multimachine type which characterized in that: comprises a folding rod assembly and an opening and closing arm assembly; the folding rod assembly comprises a first folding rod, a second folding rod and a third folding rod which are sequentially hinged, a rear wheel shaft and a swing arm support are fixedly arranged at one end of the first folding rod, which is far away from the second folding rod, and trundles are arranged on the rear wheel shaft; a traction ring and a hand traction rod are arranged at one end of the third folding rod, which is far away from the second folding rod;

each side draw arm is provided with a traction clamping seat, and the traction clamping seat is provided with a traction clamping hook groove for clamping with a protruding airplane axle type traction device, a traction pin hole for mounting a traction pin and a traction telescopic pin seat hole for mounting the traction telescopic pin; a plurality of through holes are respectively formed in the two front swing arms, and the through holes in the two front swing arms correspond to one another; the cassette aperture stop link can pass two corresponding perforating holes, the cassette aperture stop link includes cassette aperture stop link and two sets up respectively the quick connector at cassette aperture stop link both ends.

2. A collapsible multi-unit type universal drawbar according to claim 1, characterized in that: the second folding rod is hinged with the first folding rod through a folding hinge, and the third folding rod is hinged with the second folding rod through a folding hinge; the folding hinge comprises two movable fan blades and a hinge shaft, the two movable fan blades are rotationally connected through the hinge shaft, and the movable fan blades are fixedly arranged at the end parts of the first folding rod, the second folding rod or the third folding rod; the included angle of the hinge shafts of the two folding hinges is 60 degrees; a trundle storage support is arranged on the third folding rod; the middle parts of the second folding rod and the third folding rod are respectively provided with an opening-closing arm clamping plate fixing support, the opening-closing arm clamping plate fixing supports are used for installing an opening-closing arm receiving limiting clamping plate, and the opening-closing arm receiving limiting clamping plate is used for limiting the side pull arm; and an accessory fixing seat for storing the traction pin and the clamping seat opening limiting pull rod is fixedly arranged on the second folding rod.

3. A collapsible multi-unit type universal drawbar according to claim 1, characterized in that: the traction clamping hook groove is positioned at one end of the traction clamping seat, the other end of the traction clamping seat is fixedly connected with one end of a clamping seat indexing shaft, a plurality of clamping seat indexing holes perpendicular to the axial direction of the clamping seat indexing shaft are formed in one end, close to the traction clamping seat, of the clamping seat indexing shaft along the circumferential direction, the clamping seat indexing shaft is a blind hole, the clamping seat indexing shaft penetrates through a clamping seat supporting shaft seat on the side pull arm, a positioning hole is formed in the clamping seat supporting shaft seat, and the positioning hole is connected with one clamping seat indexing hole through a spring plunger pin;

4. A collapsible multi-unit type universal drawbar according to claim 1, characterized in that: the traction telescopic pin comprises a telescopic pin body, a mandril, an end cover and a second pressure spring, the telescopic pin body is a stepped shaft, and the telescopic pin body is arranged in the traction telescopic pin base hole in a sliding manner;

5. A collapsible multi-unit type universal drawbar according to claim 1, characterized in that: the limiting sliding sleeve comprises two side clamping plates and two clamping plates, the two side clamping plates are located between the two clamping plates, the clamping plates are fixedly connected with the adjacent side clamping plates through bolts, and the two side clamping plates and the two clamping plates form a frame-shaped structure; each clamping plate is provided with a plurality of stepped holes, the outer holes of the stepped holes are threaded holes, the inner holes of the stepped holes are unthreaded holes, set screws are installed in the outer holes, and universal balls are arranged in the inner holes; the inner side of each side clamping plate is provided with a plurality of guide plates; the middle part of the side clamping plate and the middle part of the clamping plate are both provided with a bolt assembly pin hole, a plurality of positioning pin holes are uniformly formed in the rod body of the first folding rod along the axial direction corresponding to the bolt assembly pin holes, the limiting sliding sleeve is fixedly connected with the first folding rod through a bolt assembly, and the bolt assembly penetrates through the positioning pin holes and penetrates through the bolt assembly pin holes in the side clamping plate or the bolt assembly pin holes in the clamping plate;

6. A collapsible multi-unit type universal drawbar according to claim 1, characterized in that: the folding leg assembly comprises a folding leg rod, a folding leg rod sliding sleeve pin shaft, a folding leg base and a third pressure spring, one end of the folding rod supporting leg rod is hinged with a folding supporting leg mounting seat arranged below one end of the first folding rod close to the second folding rod, the folding rod leg support base is fixedly arranged at the other end of the folding rod leg support, the folding rod leg support sliding sleeve and the third pressure spring are sleeved on the folding rod leg support, one end of the third pressure spring is abutted against the sliding sleeve of the leg support rod of the folding rod, the other end of the third pressure spring is abutted against the base of the leg support of the folding rod, the top of the folding rod leg support rod is provided with a through long groove, the side wall of the folding rod leg support rod sliding sleeve is provided with a pin shaft through hole, and a pin shaft of the folding rod leg support rod sliding sleeve penetrates through the pin shaft through hole and the through long groove; the folding leg mounting seat is provided with a transition fillet, the horizontal end and the vertical end of the transition fillet are respectively provided with a groove matched with the diameter of the folding rod leg rod sliding sleeve pin shaft, and the third pressure spring can drive the folding rod leg rod sliding sleeve pin shaft to be clamped in any one groove on the transition fillet.

7. A collapsible multi-unit type universal drawbar according to claim 2, characterized in that: a folding latch mounting seat and a folding latch assembly are arranged at two ends of the second folding rod, the folding latch mounting seat is fixedly connected with the movable fan blade fixedly arranged on the second folding rod, the folding latch mounting seat and the hinge shaft are respectively positioned at two ends of the movable fan blade, the folding latch assembly comprises a folding latch body, a folding latch cam, a folding latch jacking pin and a fourth pressure spring, two fisheye screw rods are in threaded connection with the folding latch body, fisheyes of the two fisheye screw rods are positioned at the same side of the folding latch body, and the fisheyes of the two fisheye screw rods are connected with the folding latch mounting seat through a rotating hinge shaft; one end of the folding lock catch body, which is far away from the folding lock catch mounting seat, is provided with a U-shaped groove, one end of the folding lock catch cam is positioned in the U-shaped groove and is rotationally connected with the folding lock catch body through a first pin shaft, the middle part of the folding lock catch body is provided with a stepped through hole, one end of the stepped through hole is communicated with the U-shaped groove, the other end of the stepped through hole is communicated with a shaft hole of the rotating pin shaft, and the top pin of the folding lock catch is slidably arranged in the stepped through hole; the folding lock catch top pin is a three-stage stepped shaft and is divided into a first-stage stepped shaft, a second-stage stepped shaft and a third-stage stepped shaft from one end to the other end; and the diameter of the first-stage step shaft is matched with the aperture of the through hole in the movable fan blade, the diameter of the second-stage step shaft is larger than that of the first-stage step shaft, the fourth pressure spring is sleeved on the top pin of the folding lock catch, a second pin shaft is arranged on the third-stage step shaft, one end of the fourth pressure spring is supported on the second pin shaft, the other end of the fourth pressure spring is supported on the step surface of the stepped through hole, and the second pin shaft is located at one side, away from the rotating pin shaft, of the fourth pressure spring.

8. A collapsible multi-unit type universal drawbar according to claim 1, characterized in that: one end of the first folding rod, which is far away from the second folding rod, is also provided with a folding rod tail end buckle assembly; folding rod tail end buckle assembly includes folding rod tail end buckle, folding rod tail end trip seat cover and folding rod tail end trip, folding rod tail end buckle is articulated through the shaft hole on folding rod tail end buckle axle and the folding rod tail end buckle mounting panel, folding rod tail end buckle mounting panel sets firmly on the first folding rod, folding rod tail end trip seat cover through folding rod tail end trip seat cover axle with folding rod tail end buckle is articulated, folding rod tail end trip one end be collude form, the other end and folding rod tail end trip seat cover threaded connection.