CN110949235B

CN110949235B - Tension device

Info

Publication number: CN110949235B
Application number: CN201911314586.8A
Authority: CN
Inventors: 胡富英
Original assignee: Hangzhou Lebelung Machinery Manufacturing Co ltd
Current assignee: Hangzhou Jiarunhong Machinery Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2021-05-25
Anticipated expiration: 2039-12-19
Also published as: CN110949235A

Abstract

The invention discloses a tensioning device, which comprises a tensioner, a lifting hook, a luggage rope and a pull rope, wherein the tensioner comprises a box body, the box body is provided with a first opening, one side panel of the box body is provided with a ratchet wheel, gear one, gear two and gear three, gear one is fixed with the blend stop, gear two meshes with gear one and gear three respectively, be equipped with winder and axis of rotation in the box body, one of them side board of box body is run through to winder one end is connected with the ratchet, the winder other end rotates with another side board of box body and is connected, axis of rotation one end is run through one of them side board of box body and is connected with gear three, the axis of rotation other end rotates with another side board of box body and is connected, be equipped with limit structure and reset structure in the axis of rotation, luggage rope one end and winder wiring, the luggage rope other end is walked around axis of rotation through opening one and is connected with the lifting hook, the box. The invention has the beneficial effects that: the luggage rope can be automatically tightened and locked; the lifting hook can be automatically opened and locked.

Description

Tension device

Technical Field

The invention relates to the technical field of rigging, in particular to a tensioning device.

Background

Under the condition of transportation, movement, shipment or storage of some goods, the strainer has certain fixed function, and they have the locking back, can not drop, safe and reliable, and light, easy and simple to handle, protect the object not damaged, mainly play the tensioning effect. In the transportation process of goods, the goods transportation vehicle is often bumpy under the influence of the road surface, so that the goods can be loosened to cause the falling phenomenon, the tensioner cannot be automatically locked under the condition that the luggage rope is loosened, and meanwhile, the conventional tensioner is often manually locked in the operation process and cannot realize the automatic locking function generally.

Disclosure of Invention

The invention provides a tensioning device capable of realizing an automatic locking function, aiming at overcoming the defect that the automatic locking cannot be realized in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a tensioning device comprises a tensioner, a lifting hook, a luggage rope and a pull rope, wherein the tensioner comprises a box body, a first opening is formed in the box body, a ratchet wheel, a first gear, a second gear and a third gear are arranged on one side panel of the box body, a blocking strip matched with the ratchet wheel is fixedly connected to the first gear, one side of the second gear is meshed with the first gear, the other side of the second gear is meshed with the third gear, a winder and a rotating shaft are arranged in the box body, one end of the winder penetrates through one side panel of the box body and is connected with the ratchet wheel, the other end of the winder is rotatably connected with the other side panel corresponding to the box body, one end of the rotating shaft penetrates through one side panel of the box body and is connected with the third gear, the other end of the rotating shaft is rotatably connected with the other side panel corresponding to the box body, and a limiting structure and a, one end of the luggage rope is connected with the winder in a winding mode, the other end of the luggage rope is connected with the lifting hook through the first penetrating opening after bypassing the rotating shaft, and the box body is connected with the hook through the pull rope.

The strainer comprises a box body, an opening I is arranged on the box body, a ratchet wheel, a gear I, a gear II and a gear III are arranged on one side panel of the box body, a blocking strip matched with the ratchet wheel is fixedly connected onto the gear I, one side of the gear II is meshed with the gear I, the other side of the gear II is meshed with the gear III, a winder and a rotating shaft are arranged in the box body, one end of the winder penetrates through one side panel of the box body to be connected with the ratchet wheel, the other end of the winder is rotatably connected with the other side panel corresponding to the box body, one end of the rotating shaft penetrates through one side panel of the box body to be connected with the gear III, the other end of the rotating shaft is rotatably connected with the other side panel corresponding to the box body, a limiting structure and a resetting structure are arranged on the rotating shaft, one end of a luggage rope is, the box body is connected with a hook through a pull rope. The luggage rope is a woven rope, the first opening is formed in the box body, the purpose that the luggage rope is fully contacted with the rotating shaft is guaranteed, and an operator can conveniently pull the luggage rope to generate dynamic friction with the rotating shaft to drive the rotating shaft to rotate; in an initial state, the luggage rope between the ratchet wheel and the third gear is in a loose state, so that an operator can conveniently pull the luggage rope, the luggage rope generates dynamic friction with the outer surface of the rotating shaft, the third gear rotates under the action of the dynamic friction, the third gear drives the second gear to rotate in the opposite direction, the second gear drives the first gear and the barrier strip to rotate in the same direction as the first gear, so that the ratchet wheel is opened, the third gear stops rotating through the limiting structure, so that the first gear stops rotating, the ratchet wheel is prevented from being locked after the third gear drives the barrier strip to rotate for 360 degrees, the pulling force generated by the operator on the luggage rope overcomes the dynamic friction, the luggage rope wound on the winder is pulled until the proper position is reached, the winder tightens the luggage rope, and finally the luggage rope is fixed through the lifting hook; at the moment, the gear tee joint is reset through the reset mechanism, so that the gear tee joint drives the barrier strip to reset through the gear II and the gear I in sequence, and the automatic locking ratchet wheel is automatically locked.

Preferably, the winder comprises a winding reel, a winding reel and a spiral spring, the winding reel is installed in the winding reel, the central shaft of the winding reel and the central shaft of the winding reel are of the same axis, a lantern ring is arranged at one end of the winding reel, the winding reel penetrates through one side panel of the box body through the lantern ring and is connected with the ratchet wheel, a flanging is arranged at the other end of the winding reel, an L-shaped groove matched with the flanging is formed in the other side panel corresponding to the box body, the winding reel is matched with the L-shaped groove through the flanging and is connected with the side panel of the box body in a rotating mode, one end of the winding reel is sleeved with the winding reel, the other end of the winding reel penetrates through the winding reel and is fixedly connected with one side panel of the box body provided with the L-shaped groove. One end of the clockwork spring is fixedly connected to the winding reel, the other end of the clockwork spring is connected to the winding reel, the winding reel rotates along with the pulling of the luggage rope, and the locking is achieved through the matching of the ratchet wheel and the stop strip, so that the functions of automatic tightening and automatic locking of the luggage rope are achieved.

As preferred, limit structure includes the arc limiting plate, the center pin of arc limiting plate is same axis with the center pin of axis of rotation, the arc limiting plate is located the both ends of axis of rotation and is close to the border position department of axis of rotation tip, be equipped with on the side board of box body with arc limiting plate assorted arc hole, the arc length in arc hole is greater than the arc length of arc limiting plate, the arc hole and gear three on one of them side board are connected on the one end of axis of rotation runs through the box body through the arc limiting plate, the center pin of gear three is same axis with the center pin of arc limiting plate, the other end of axis of rotation is passed through the arc limiting plate and is cooperateed with the arc hole and is connected with the corresponding another side board rotation. When operating personnel spur luggage rope, luggage rope produces the dynamic friction with the axis of rotation and drives the axis of rotation, the axis of rotation passes through the three rotations of arc spacing plate drive gear, thereby loop through gear two and the transmission of gear one and open the blend stop from the ratchet, when the arc limiting plate rotates and contacts with the border in arc hole, axis of rotation stall, operating personnel overcomes the dynamic friction between luggage rope and the axis of rotation to the pulling force that luggage rope produced this moment, until suitable position, the design is favorable to preventing that the blend stop is rotatory 360 degrees like this, avoid luggage rope at pulling in-process blend stop locking ratchet, and reasonable design, and is easy to operate.

Preferably, the reset structure comprises a first spring, the central shaft of the first spring and the central shaft of the rotating shaft are the same axis, the first spring is positioned at the two ends of the rotating shaft and far away from the edge position of the end part of the rotating shaft, one end of the first spring is fixedly connected with the end part of the rotating shaft, and the other end of the first spring is fixedly connected with the side panel of the box body. When the luggage rope is pulled to a proper position, the rolling device tightens the luggage rope, artificial tension disappears at the moment, static friction between the rotating shaft and the luggage rope is overcome by the first torsional spring, the rotating shaft is driven to reset, the rotating shaft drives the gear to rotate in the three opposite directions through the arc limiting plate to reset, the gear drives the barrier strip to reset through the transmission of the second gear and the first gear in sequence, and the ratchet is automatically locked.

Preferably, the rotating shaft is provided with a plurality of uniformly distributed rubber raised lines I, so that the design is convenient for increasing the friction force between the luggage rope and the rotating shaft.

Preferably, the ratchet wheel is provided with a plurality of pawls which are uniformly distributed, one end of the barrier strip is fixedly connected with the first gear, the other end of the barrier strip is meshed with the pawls, and the direction of the pawls is the same as the winding direction of the luggage rope on the winding reel. The orientation of the pawl is the same as the winding direction of the luggage rope on the winding reel, so that the luggage rope can be automatically tightened and locked through a spring on the winder after being loosened in the process of cargo transportation.

Preferably, the lifting hook comprises a hook body and a hook point, the upper portion of the hook body is connected with the luggage rope, the hook point is located at the lower portion of the hook body and fixedly connected with the hook body, a lock sleeve is arranged on the hook body, the hook point is far away from one end of the lock sleeve, one end, far away from the hook point, of the lock sleeve is rotatably connected with the hook body, the other end of the lock sleeve is close to the hook point, a self-locking lock cylinder is arranged in the lock sleeve, the self-locking lock cylinder is slidably connected with the lock sleeve, a slot corresponding to the position of the self-locking lock cylinder is formed in the hook point, a self-locking trigger is arranged in the hook body, a trigger rod is arranged. An operator upwards turns the lock sleeve, hangs the lifting hook on a fixing ring on the freight car, and then resets the lock sleeve, the fixing ring acts on the hook body to trigger the self-locking trigger, the self-locking trigger drives the trigger rod to eject the self-locking lock cylinder, and the self-locking lock cylinder is inserted into the slot; when the lifting hook is separated from the fixing ring, the self-locking trigger drives the trigger rod to reset, the self-locking lock cylinder is separated from the slot, and the automatic locking and opening functions of the lifting hook are realized.

Preferably, the hook body is provided with a baffle, the lock sleeve is located between the luggage rope and the baffle, the lock sleeve is in contact with the baffle, one end of the self-locking lock cylinder is close to the slot, the other end of the self-locking lock cylinder is far away from the slot, one end, far away from the slot, of the self-locking lock cylinder is provided with a first sliding block, the inner side wall of the lock sleeve is provided with a first sliding groove matched with the first sliding block, the first sliding block is provided with a second spring, and the first sliding block is connected. The design of the baffle is favorable for realizing accurate reset of the lock sleeve, and the positions of the lock core and the slot in the lock sleeve are ensured to be corresponding to the position of the trigger rod during reset; the second spring is beneficial to realizing that when the lifting hook is not contacted with the fixed ring, the trigger rod resets, the self-locking lock cylinder automatically breaks away from the slot, and the automatic opening function of the lifting hook is realized.

Preferably, a cavity is arranged in the hook body, the self-locking trigger is positioned in the cavity, the upper side face of the lower portion of the hook body is close to the lock sleeve, the lower side face of the lower portion of the hook body is far away from the lock sleeve, a second opening is arranged on the upper side face of the lower portion of the hook body and communicated with the cavity, the self-locking trigger comprises a lever, a plurality of second rubber raised lines are arranged on the lever, one end of each second rubber raised line is fixedly connected with the lever, the other end of each second rubber raised line penetrates through the second opening and is positioned outside the cavity, a support shaft is arranged on the lever, the lever is rotatably connected with the side wall of the cavity through the support shaft, the second rubber raised lines are positioned on one side of the support shaft, a trigger rod is positioned on the other side of the support shaft, a third spring is arranged at one end of the lever, one end of the third spring is fixedly connected, the trigger rod is contacted with the other end of the lever and is positioned at one end far away from the hook point in the cavity. The lifting hook generates upward tightening force under the tightening action of the winder, meanwhile, the fixing ring generates downward reaction force to act on the rubber raised line II, according to the lever principle, the other end of the lever pushes out the trigger rod, the trigger rod acts on the self-locking lock cylinder, and the self-locking lock cylinder is inserted into the slot to achieve the effect of automatic locking of the lifting hook; the rubber convex strip II is favorable for preventing the fixed ring from sliding relative to the position of the lifting hook, and the fixed ring is guaranteed to act on the rubber convex strip II all the time.

Preferably, the one end fixedly connected with dog of trigger bar is equipped with the through-hole on the coupler body, the other end of trigger bar runs through behind the through-hole and is located between lock sleeve and the coupler body and corresponding with the position of auto-lock core, the shape of dog is circular, the diameter of dog is greater than the diameter of through-hole, one side and the lever of dog contact, the opposite side of dog is equipped with a plurality of springs four, a plurality of springs four use the trigger bar as central evenly distributed on the dog, the dog passes through the lateral wall fixed connection of spring four and cavity. The spring IV can prevent the trigger rod from separating from the hook body, when the rubber raised line II at one end of the lever is not contacted with the fixing ring, the spring III contracts and resets, the spring IV extends and resets, the spring IV drives the trigger rod to reset, and the self-locking lock cylinder automatically separates from the slot under the contraction and reset action of the spring II, so that the function of automatically opening the hook is realized; the stop block is beneficial to the installation and connection of the spring IV and plays a limiting role on the trigger rod at the same time.

The invention has the beneficial effects that: the luggage rope can realize the functions of automatic tightening and automatic locking through the winder; the lifting hook can realize the functions of automatic opening and automatic locking; simple structure, reasonable in design and the operating personnel of being convenient for operate.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the tensioner;

FIG. 3 is a bottom view of FIG. 2;

FIG. 4 is a cross-sectional view A-A of FIG. 2;

FIG. 5 is a schematic view of the unlocked configuration of the hook;

FIG. 6 is a schematic view of the hook lock;

FIG. 7 is an enlarged view of the structure at A in FIG. 5;

fig. 8 is an enlarged view of the structure at B in fig. 6.

In the figure: 1. the self-locking device comprises a tensioner, 2 a lifting hook, 3 a luggage rope, 4 a pulling rope, 5 a box body, 6 a first opening, 7 a ratchet wheel, 8 a first gear, 9 a second gear, 10 a third gear, 11 a stop strip, 12 a winder, 13 a rotating shaft, 14 a limiting structure, 15 a reset structure, 16 a hook, 17 a winding reel, 18 a winding reel, 19 a spring, 20 a lantern ring, 21 a flanging, 22 an L-shaped groove, 23 an arc limiting plate, 24 an arc hole, 25 a first spring, 26 a first rubber convex strip, 27 a pawl, 28 a hook body, 29 a hook tip, 30 a lock sleeve, 31 a self-locking lock cylinder, 32 a slot, 33 a self-locking trigger, 34 a trigger rod, 35 a baffle, 36 a first sliding block, 37 a first sliding groove, 38 a second spring, 39 a cavity, 40 a second opening, 41 a lever, 42 a second rubber convex strip, 43 a supporting shaft, 44 a third spring, 45. the second sliding block 46, the second sliding groove 47, the stop block 48, the through hole 49 and the fourth spring.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

In the embodiment shown in fig. 1, the tensioning device comprises a tensioner 1, a hook 2, a luggage rope 3 and a pull rope 4, wherein the tensioner 1 comprises a box body 5, as shown in fig. 2 and 3, an opening I6 is arranged on the box body 5, a ratchet wheel 7, a gear I8, a gear II 9 and a gear III 10 are arranged on one side panel of the box body 5, a stop strip 11 matched with the ratchet wheel 7 is fixedly connected on the gear I8, one side of the gear II 9 is meshed with the gear I8, the other side of the gear II 9 is meshed with the gear III 10, a winder 12 and a rotating shaft 13 are arranged in the box body 5, one end of the winder 12 penetrates through one side panel of the box body 5 to be connected with the ratchet wheel 7, the other end of the winder 12 is rotatably connected with the other side panel corresponding to the box body 5, one end of the rotating shaft 13 penetrates through one side panel of the box body 5, the other end of rotation axis 13 rotates with another corresponding side panel of box body 5 and is connected, is equipped with limit structure 14 and reset structure 15 on the rotation axis 13, as shown in fig. 1, and the one end and the 12 convolutes of winder of luggage rope 3 are connected, and the other end of luggage rope 3 is passed through behind rotation axis 13 and is run through opening 6 and be connected with lifting hook 2, and box body 5 is connected with couple 16 through stay cord 4.

As shown in fig. 2, the winding device 12 includes a winding reel 17, a winding reel 18 and a spring 19, as shown in fig. 3, the winding reel 18 is installed in the winding reel 17, the central axis of the winding reel 18 and the central axis of the winding reel 17 are the same axis, one end of the winding reel 17 is provided with a collar 20, the winding reel 17 penetrates through one side panel of the box body 5 through the collar 20 to be connected with the ratchet wheel 7, the other end of the winding reel 17 is provided with a flange 21, the other side panel corresponding to the box body 5 is provided with an L-shaped groove 22 matched with the flange 21, the winding reel 17 is matched with the L-shaped groove 22 through the flange 21 to be rotatably connected with the side panel of the box body 5, one end of the winding reel 18 is sleeved with the winding reel 17, the other end of the winding reel 18 penetrates through the winding reel 17 to be fixedly connected with one side panel of the box body 5 provided with the L-shaped groove 22, as, the other end of the spring 19 is connected to the spool 17.

As shown in fig. 2, 3 and 4, the limiting structure 14 includes an arc limiting plate 23, the central axis of the arc limiting plate 23 and the central axis of the rotating shaft 13 are the same axis, the arc limiting plates 23 are located at the two ends of the rotating shaft 13 and near the edge of the end of the rotating shaft 13, an arc hole 24 matched with the arc limiting plate 23 is provided on the side panel of the box body 5, the arc length of the arc hole 24 is greater than the arc length of the arc limiting plate 23, as shown in fig. 4, one end of the rotating shaft 13 penetrates through the arc-shaped hole 24 on one of the side panels of the box body 5 through the arc-shaped limiting plate 23 to be connected with the gear three 10, the central axis of the gear three 10 and the central axis of the arc-shaped limiting plate 23 are the same axis, the other end of the rotating shaft 13 is matched with the arc-shaped hole 24 through the arc-shaped limiting plate 23 to be rotatably connected with the other side panel corresponding to the box body 5, as shown in fig. 1, the luggage cord 3 is in contact with the side of the rotating shaft 13 on which the arc-shaped stopper plate 23 is provided.

As shown in fig. 4, the restoring structure 15 includes a first spring 25, a central axis of the first spring 25 and a central axis of the rotating shaft 13 are the same axis, the first spring 25 is located at two ends of the rotating shaft 13 and is far away from an edge position of an end of the rotating shaft 13, one end of the first spring 25 is fixedly connected with the end of the rotating shaft 13, and the other end of the first spring 25 is fixedly connected with a side panel of the box 5. The rotating shaft 13 is provided with a plurality of uniformly distributed rubber convex strips I26.

As shown in fig. 1 and 2, the ratchet wheel 7 is provided with a plurality of evenly distributed pawls 27, one end of the barrier strip 11 is fixedly connected with the first gear 8, the other end of the barrier strip 11 is meshed with the pawls 27, and the direction of the pawls 27 is the same as the winding direction of the luggage rope 3 on the winding reel 17.

As shown in fig. 1, the hook 2 includes a hook body 28 and a hook tip 29, an upper portion of the hook body 28 is connected to the luggage rope 3, the hook tip 29 is located at a lower portion of the hook body 28 and is fixedly connected to the hook body 28, as shown in fig. 5 and 6, the hook body 28 is provided with a lock sleeve 30, one end of the lock sleeve 30 is far away from the hook tip 29, one end of the lock sleeve 30 far away from the hook tip 29 is rotatably connected to the hook body 28, the other end of the lock sleeve 30 is close to the hook tip 29, a self-locking lock cylinder 31 is provided in the lock sleeve 30, the self-locking lock cylinder 31 is slidably connected to the lock sleeve 30, the hook tip 29 is provided with a slot 32 corresponding to the position of the self-locking lock cylinder 31, a self-locking trigger 33 is provided in the hook body 28, the self-locking trigger 33 is.

As shown in fig. 5 and 6, the hook body 28 is provided with a baffle 35, the lock sleeve 30 is located between the luggage rope 3 and the baffle 35, the lock sleeve 30 is in contact with the baffle 35, one end of the self-locking lock cylinder 31 is close to the slot 32, and the other end of the self-locking lock cylinder 31 is far away from the slot 32, as shown in fig. 7 and 8, one end of the self-locking lock cylinder 31, which is far away from the slot 32, is provided with a first sliding block 36, a first sliding groove 37 matched with the first sliding block 36 is arranged on the inner side wall of the lock sleeve 30, the first sliding block 36 is provided with a second spring 38, and the first sliding.

As shown in fig. 5 and 6, a cavity 39 is provided in the hook body 28, the self-locking trigger 33 is located in the cavity 39, the upper side surface of the lower portion of the hook body 28 is close to the lock sleeve 30, the lower side surface of the lower portion of the hook body 28 is far away from the lock sleeve 30, a second opening 40 is provided on the upper side surface of the lower portion of the hook body 28, the second opening 40 is communicated with the cavity 39, the self-locking trigger 33 comprises a lever 41, a plurality of second rubber protruding strips 42 are provided on the lever 41, one end of the second rubber protruding strips 42 is fixedly connected with the lever 41, the other end of the second rubber protruding strips 42 penetrates through the second opening 40 and is located outside the cavity 39, a support shaft 43 is provided on the lever 41, the lever 41 is rotatably connected with the side wall of the cavity 39 through the support shaft 43, the second rubber protruding strips 42 are located on one side of the support shaft 43, the trigger bar 34 is located on the other, a second sliding groove 46 matched with the second sliding block 45 is arranged at one end, close to the hook tip 29, in the cavity 39, a third spring 44 is connected with the side wall of the cavity 39 in a sliding mode through the second sliding block 45, the trigger rod 34 is in contact with the other end of the lever 41, and the trigger rod 34 is located at one end, far away from the hook tip 29, in the cavity 39.

As shown in fig. 7 and 8, one end of the trigger rod 34 is fixedly connected with a stopper 47, the hook body 28 is provided with a through hole 48, the other end of the trigger rod 34 penetrates through the through hole 48 and then is positioned between the lock sleeve 30 and the hook body 28 and corresponds to the position of the self-locking lock cylinder 31, the stopper 47 is circular, the diameter of the stopper 47 is larger than that of the through hole 48, one side of the stopper 47 is in contact with the lever 41, the other side of the stopper 47 is provided with a plurality of springs 49, the springs 49 are uniformly distributed on the stopper 47 by taking the trigger rod 34 as the center, and the stopper 47 is fixedly connected with the side wall of the cavity 39 through the springs 49.

The working principle of the tensioner 1 is as follows: the luggage rope 3 is a braided rope, in an initial state, the luggage rope 3 between the ratchet wheel 7 and the gear III 10 is in a loose state, so that an operator can conveniently pull the luggage rope 3 to generate dynamic friction between the luggage rope 3 and the outer surface of the rotating shaft 13, the rotating shaft 13 drives the gear III 10 to rotate through the arc limiting plate 23 under the action of the dynamic friction, the barrier strip 11 is opened from the ratchet wheel 7 through the transmission of the gear II 9 and the gear I8 in sequence, and the ratchet wheel 7 is opened; when the arc limiting plate 23 rotates to be in contact with the boundary of the arc hole 24, the rotating shaft 13 stops rotating, at this time, the pulling force generated by the operator on the luggage rope 3 overcomes the dynamic friction between the luggage rope 3 and the rotating shaft 13, so as to pull the luggage rope 3 wound on the winder 12 to a proper position, the winder 12 tightens the luggage rope 3, and finally, the luggage rope is fixed through the hook 2; when the luggage rope 3 is pulled to a proper position, the rolling device 12 tightens the luggage rope 3, the artificial tension disappears, the torsional spring I25 overcomes the static friction between the rotating shaft 13 and the luggage rope 3, the rotating shaft 13 is driven to reset, the rotating shaft 13 drives the gear III 10 to reversely rotate and reset through the arc limiting plate 23, the gear II 9 and the gear I8 are driven to drive the barrier strip 11 to reset sequentially, and the ratchet wheel 7 is automatically locked.

The orientation of the pawl 27 is the same as the winding direction of the luggage rope 3 on the winding reel 17, and when the luggage rope 3 is loosened due to bumping of the cargo during transportation of the cargo, the luggage rope 3 can be automatically tightened and locked by the spring 19 on the winder 12.

The working principle of the lifting hook 2 is as follows: the operator turns the lock sleeve 30 upwards, hangs the hook 2 on the fixed ring on the freight car, and then resets the lock sleeve 30, and the lock sleeve 30 contacts with the baffle 35. Under the tightening action of the winder 12, the lifting hook 2 generates upward tightening force, meanwhile, the fixing ring generates downward reaction force to act on the second rubber convex strip 42, according to the lever principle, the other end of the lever 41 ejects the trigger rod 34, the trigger rod 34 acts on the self-locking lock cylinder 31, and the self-locking lock cylinder 31 is inserted into the slot 32 to achieve the effect of automatically locking the lifting hook 2; when the second rubber convex strip 42 at one end of the lever 41 is not in contact with the fixed ring, the third spring 44 contracts and resets, the fourth spring 49 extends and resets, the fourth spring 49 drives the trigger rod 34 to reset, the self-locking lock cylinder 31 automatically separates from the slot 32 under the contraction and reset action of the second spring 38, and the function of automatically opening the hook 2 is realized.

Claims

1. A tensioning device is characterized by comprising a tensioner (1), a lifting hook (2), a luggage rope (3) and a pull rope (4), wherein the tensioner (1) comprises a box body (5), a first opening (6) is formed in the box body (5), a ratchet wheel (7), a first gear (8), a second gear (9) and a third gear (10) are arranged on one side panel of the box body (5), a blocking strip (11) matched with the ratchet wheel (7) is fixedly connected to the first gear (8), one side of the second gear (9) is meshed with the first gear (8), the other side of the second gear (9) is meshed with the third gear (10), a winder (12) and a rotating shaft (13) are arranged in the box body (5), one end of the winder (12) penetrates through one side panel of the box body (5) to be connected with the ratchet wheel (7), and the other end of the winder (12) is rotatably connected with the other side panel corresponding to the box body (5), one of them side board that the one end of axis of rotation (13) runs through box body (5) is connected with three (10) of gear, the other end and the corresponding another side board rotation of box body (5) of axis of rotation (13) are connected, be equipped with limit structure (14) and reset structure (15) on axis of rotation (13), the one end and the coiler (12) of luggage rope (3) are convoluteed and are connected, the other end of luggage rope (3) is walked around axis of rotation (13) back through opening (6) and is connected with lifting hook (2), box body (5) are connected with couple (16) through stay cord (4).

2. A tensioning device according to claim 1, characterized in that the winding device (12) comprises a winding reel (17), a winding reel (18) and a spring (19), the winding reel (18) is installed in the winding reel (17), the central axis of the winding reel (18) and the central axis of the winding reel (17) are coaxial, one end of the winding reel (17) is provided with a collar (20), the winding reel (17) penetrates through one side panel of the box body (5) through the collar (20) and is connected with the ratchet wheel (7), the other end of the winding reel (17) is provided with a flange (21), the other side panel corresponding to the box body (5) is provided with an L-shaped groove (22) matched with the flange (21), the winding reel (17) is matched with the L-shaped groove (22) through the flange (21) and is rotatably connected with the side panel of the box body (5), one end of the winding reel (18) is sleeved with the winding reel (17), the other end of the winding reel (18) penetrates through the winding reel (17) and is fixedly connected with a side panel of the box body (5) provided with the L-shaped groove (22), the spiral spring (19) is wound and connected onto the winding reel (18), one end of the spiral spring (19) is connected with the winding reel (18), and the other end of the spiral spring (19) is connected with the winding reel (17).

3. The tensioning device as claimed in claim 1 or 2, wherein the limiting structure (14) comprises an arc limiting plate (23), the central axis of the arc limiting plate (23) and the central axis of the rotating shaft (13) are the same axis, the arc limiting plate (23) is located at the two ends of the rotating shaft (13) and close to the edge of the end of the rotating shaft (13), an arc hole (24) matched with the arc limiting plate (23) is formed in the side plate of the box body (5), the arc length of the arc hole (24) is greater than that of the arc limiting plate (23), one end of the rotating shaft (13) penetrates through the arc hole (24) in one side plate of the box body (5) through the arc limiting plate (23) and is connected with a gear III (10), and the central axis of the gear III (10) and the central axis of the arc limiting plate (23) are the same axis, the other end of axis of rotation (13) matches through arc limiting plate (23) and arc hole (24) and is connected with the corresponding another side panel rotation of box body (5), luggage rope (3) contacts with the one side that is equipped with arc limiting plate (23) on axis of rotation (13).

4. A tensioning device as claimed in claim 3, characterized in that the return structure (15) comprises a first spring (25), the central axis of the first spring (25) is coaxial with the central axis of the rotary shaft (13), the first spring (25) is located at the edge position of the two ends of the rotary shaft (13) far away from the end of the rotary shaft (13), one end of the first spring (25) is fixedly connected with the end of the rotary shaft (13), and the other end of the first spring (25) is fixedly connected with the side panel of the box body (5).

5. A tensioner as claimed in claim 4, characterized in that said rotating shaft (13) is provided with a plurality of uniformly distributed first rubber ribs (26).

6. A tensioning device as claimed in claim 2, characterized in that the ratchet wheel (7) is provided with a plurality of evenly distributed pawls (27), one end of the bar (11) is fixedly connected to the first gear wheel (8), the other end of the bar (11) is engaged with the pawls (27), and the pawls (27) face in the same direction as the luggage cord (3) is wound around the spool (17).

7. The tensioning device as claimed in claim 1, wherein the hook (2) comprises a hook body (28) and a hook tip (29), the upper part of the hook body (28) is connected with the luggage rope (3), the hook tip (29) is located at the lower part of the hook body (28) and is fixedly connected with the hook body (28), a lock sleeve (30) is arranged on the hook body (28), one end of the lock sleeve (30) is far away from the hook tip (29), one end of the lock sleeve (30) far away from the hook tip (29) is rotatably connected with the hook body (28), the other end of the lock sleeve (30) is close to the hook tip (29), a self-locking lock cylinder (31) is arranged in the lock sleeve (30), the self-locking lock cylinder (31) is slidably connected with the lock sleeve (30), a slot (32) corresponding to the position of the self-locking lock cylinder (31) is arranged on the hook tip (29), and a self-locking trigger (33) is arranged in the hook body (28), the self-locking trigger (33) is provided with a trigger rod (34), and the trigger rod (34) penetrates through the hook body (28) and corresponds to the self-locking lock cylinder (31).

8. A tensioning device as claimed in claim 7, characterized in that a baffle (35) is arranged on the hook body (28), the lock sleeve (30) is positioned between the luggage rope (3) and the baffle (35), the lock sleeve (30) is in contact with the baffle (35), one end of the self-locking lock cylinder (31) is close to the slot (32), the other end of the self-locking lock cylinder (31) is far away from the slot (32), a first sliding block (36) is arranged at one end of the self-locking lock cylinder (31) far away from the slot (32), a first sliding groove (37) matched with the first sliding block (36) is arranged on the inner side wall of the lock sleeve (30), a second spring (38) is arranged on the first sliding block (36), and the first sliding block (36) is connected with the end of the first sliding groove (37) through the second spring (38).

9. A tensioning device as claimed in claim 7 or 8, characterized in that a cavity (39) is provided in the hook body (28), the self-locking trigger (33) is provided in the cavity (39), the upper side of the lower part of the hook body (28) is close to the lock sleeve (30), the lower side of the lower part of the hook body (28) is far away from the lock sleeve (30), a second opening (40) is provided on the upper side of the lower part of the hook body (28), the second opening (40) is communicated with the cavity (39), the self-locking trigger (33) comprises a lever (41), the lever (41) is provided with a plurality of second rubber convex strips (42), one end of the second rubber convex strips (42) is fixedly connected with the lever (41), the other end of the second rubber convex strips (42) penetrates through the second opening (40) and is provided outside the cavity (39), the lever (41) is provided with a support shaft (43), the utility model discloses a lock catch, including lever (41), support shaft (43), trigger bar (34), one end of lever (41) and slider two (46), the lateral wall of lever (41) is rotated and is connected through support shaft (43) and cavity (39), rubber sand grip two (42) are located the one side of support shaft (43), trigger bar (34) are located the opposite side of support shaft (43), the one end of lever (41) is equipped with spring three (44), the one end and lever (41) fixed connection of spring three (44), the other end fixedly connected with slider two (45) of spring three (44), the one end that is close to hook point (29) in cavity (39) is equipped with and slider two (45) assorted spout two (46), spring three (44) are through slider two (45) and the lateral wall sliding connection of cavity (39), trigger bar (34) contact with the other end of lever (41), trigger bar (34) are located the one end of keeping away from hook point (.

10. The tensioning device as claimed in claim 9, wherein a stopper (47) is fixedly connected to one end of the trigger rod (34), a through hole (48) is formed in the hook body (28), the other end of the trigger rod (34) penetrates through the through hole (48) and then is located between the lock sleeve (30) and the hook body (28) and corresponds to the position of the self-locking lock cylinder (31), the stopper (47) is circular, the diameter of the stopper (47) is larger than that of the through hole (48), one side of the stopper (47) is in contact with the lever (41), a plurality of springs (49) are arranged on the other side of the stopper (47), the springs (49) are uniformly distributed on the stopper (47) by taking the trigger rod (34) as a center, and the stopper (47) is fixedly connected with the side wall of the cavity (39) through the springs (49).