CN110562119B

CN110562119B - Tensioner

Info

Publication number: CN110562119B
Application number: CN201910808511.9A
Authority: CN
Inventors: 阮卜琴; 朱正中
Original assignee: Zhejiang Topsun Logistic Control Co Ltd
Current assignee: Zhejiang Topsun Logistic Control Co Ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-09-01
Anticipated expiration: 2039-08-29
Also published as: CN110562119A

Abstract

The invention provides a tensioner, and belongs to the technical field of logistics binding equipment. The problem that a tensioner in the prior art is labor-consuming to operate and easy to cause insufficient pretightening force is solved. This strainer includes the body, the handle and the installation axle of setting on the body, it is equipped with the tightening wheel to install epaxial rotation cover, the lateral part that lies in the tightening wheel on the installation axle still rotates the cover and is equipped with the linkage wheel, the linkage wheel inlays to be located on the body and can drive the linkage wheel through operating handle and rotate, the tip of tightening wheel is pegged graft mutually with the linkage wheel and both can rotate relatively, be equipped with the external tooth along circumference on the outer peripheral face of linkage wheel, link firmly the ring gear that sets up with the axle center with the linkage wheel on the body, be equipped with the planet wheel that all meshes with the external tooth on the linkage wheel and the internal tooth on the. The invention has the advantages of labor saving in operation and good stability, and can reach a larger pre-tightening force value.

Description

Tensioner

Technical Field

The invention belongs to the technical field of logistics binding equipment, and relates to a tensioner.

Background

In the freight transportation process, need fix the goods to prevent that the goods from appearing shifting and rocking, the strainer is the most commonly used apparatus of binding in the freight transportation process, and the appearance of strainer has brought very big guarantee for the security of freight.

The tensioner generally comprises a body, a tightening wheel, a handle and other components, wherein the tightening wheel is used for winding a binding piece, the binding piece generally comprises a chain, a steel wire rope, a woven belt and the like, and the structure of the tightening wheel is different according to different selection of the binding piece. In the existing tensioner, in order to tighten the binding piece, two ends of a tightening wheel are generally respectively connected with a ratchet wheel, and then the handle is matched with the ratchet wheel to drive the ratchet wheel to rotate when the handle is repeatedly pulled, so that the binding piece is tightened. The chain type tensioner (application number: 201110112148.0; publication number: 102233843B) as disclosed in the Chinese patent document comprises a body, a handle, a first catch plate, a handle, a chain and a rotating shaft, wherein the body is connected with the first hook, the handle is hinged on the body through the rotating shaft, the rotating shaft is fixedly connected with a ratchet wheel, the first catch plate is movably connected on the body and embedded in the ratchet wheel, the handle is movably connected on the handle and embedded in the ratchet wheel, the middle part of the chain is positioned in the body and wound on the rotating shaft, two ends of the chain extend out of the body, one end of the chain is fixedly connected with a second hook, a spring capable of enabling the first catch plate to lean against the ratchet wheel is arranged between the first catch plate and the body, a positioning piece is further arranged on the body, and two ends of the spring respectively act on the positioning piece and the first catch. This chain strainer is because the handle directly drives the ratchet and rotates, and the ratchet directly links firmly in the pivot, and the reduction ratio is lower, consequently under the prerequisite of equal handle operating force, the pretightning force that can reach is limited, needs great operating force in the use, just can reach the pretightning force value of requirement, and to the less user of some strength like this, it can be very difficult to use. Furthermore, in some countries with strict industry standards, strict requirements are imposed on the handle operating force of the tensioner, the handle operating force of the tensioner cannot exceed a certain force value, and the pretightening force of the tensioner is ensured to meet the requirements, which causes that many common chain tensioners are difficult to use in the country.

At present, in order to solve the problem that the existing tensioner has insufficient pretightening force, the technical personnel in the field mainly realize the pretightening force by the following modes: firstly, an elongated handle is installed on the handle of the tensioner, so that the moment of operation is increased. For example, patent documents disclosed in Chinese patent document are a tensioner lengthened handle (grant publication No. CN 208647204U); and secondly, the handle with a telescopic structure is adopted, so that the handle can be extended in the operation process and can be retracted in the non-use process. Such as the telescopic handle of a tensioner disclosed in Chinese patent document (No. CN 2081065341U); in addition, some manufacturers increase the diameter of the ratchet wheel, so that the moment is increased through simple improvement, and the tensioner can achieve larger pretightening force.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a tensioner which solves the problems that the operation of the existing tensioner is labor-consuming and the pretightening force is easy to be insufficient on the premise of ensuring the stable use.

The purpose of the invention can be realized by the following technical scheme: the utility model provides a strainer, includes body, handle and the installation axle of setting on the body, it is equipped with the tightening wheel to rotate the cover on the installation axle, its characterized in that, the lateral part that lies in the tightening wheel on the installation axle still rotates the cover and is equipped with the linkage wheel, the linkage wheel inlays to be located on the body and can drive the linkage wheel through operating handle and rotate, the tip of tightening wheel is pegged graft mutually with the linkage wheel and both can rotate relatively, be equipped with the external tooth along circumference on the outer peripheral face of linkage wheel, link firmly the ring gear that sets up with the axle center with the linkage wheel on the body, be equipped with the planet wheel with the external tooth on the linkage wheel and the equal meshing of internal tooth on the ring gear on the.

In the tensioner, the tightening wheel is wound with binding pieces such as a chain or a steel wire rope in advance, when the operating handle drives the linkage wheel to rotate, at the moment, the outer peripheral surface of the linkage wheel is circumferentially provided with outer teeth, so that the planet wheel can be driven to rotate, and the inner gear ring is fixed on the body and cannot rotate, so that the planet wheel can revolve around the linkage wheel while rotating, at the moment, the planet wheel is connected to the tightening wheel, so that the tightening wheel can be driven to rotate, and the binding pieces are gradually pre-tightened. The tightening wheel and the linkage wheel can rotate relatively in the tensioner, the principle of a planetary reduction mechanism is utilized, the rotating speed of the tightening wheel is lower than the rotating speed of the linkage wheel, and a large reduction ratio is realized, so that the tensioner is labor-saving in operation, and a large pre-tightening force value can be realized on the premise that the operating force of the handle is small.

In the tensioner, the inner gear ring is fixedly connected with the body, so that the inner gear ring is high in installation precision and cannot deviate. Meanwhile, the linkage wheel is embedded in the body, so that the linkage wheel is supported by the body and is radially fixed, and the external force effect brought to the linkage wheel in the handle operation process is born by the body, so that the running precision of the linkage wheel is ensured; in addition, because the tightening wheel is connected with the binding piece, when the tensioner reaches a larger pretightening force, the binding piece acts on the tightening wheel and can apply a large radial moment to the tightening wheel. After the tensioner is provided with the linkage wheel, the end part of the tightening wheel can be plugged, so that the binding piece applies torque in the radial direction of the tightening wheel to the linkage wheel and is finally borne by the body, rather than being borne by the mounting shaft, the radial direction of the tightening wheel can not deviate, and the running precision of the planet wheel connected to the binding piece is high. Obviously, in this strainer, the linkage wheel had both played the effect of transmission power, had played the effect of radial support take-up pulley again for this strainer on the basis of realizing great pretightning force, the planet wheel and set up the linkage wheel homoenergetic of external tooth and keep higher running accuracy, avoid because the change of backlash leads to the physical deformation of tooth and the phenomenon of biting the tooth appears, make this strainer have higher stability in use.

In the tensioner, the linkage wheel comprises a meshing portion and an installation portion which are sequentially arranged along the axial direction, the linkage wheel is provided with a connecting hole which penetrates through two ends along the axial direction, the external teeth are arranged on the peripheral surface of the meshing portion, the peripheral surface of the installation portion is a cylindrical surface, a linkage wheel installation hole matched with the installation portion is formed in the body, and the installation portion is rotatably arranged in the linkage wheel installation hole. Through the installation department that the direct molding peripheral face is the face of cylinder on the linkage wheel, rely on this installation department and linkage wheel mounting hole cooperation, can guarantee to have higher stability and installation accuracy after the linkage wheel installation, and through directly seting up the external tooth on the linkage wheel, just can guarantee that external tooth and planet wheel have higher meshing accuracy.

In the tensioner, one side of the installation part, which is opposite to the meshing part, is also connected with a sleeving part, the connecting hole penetrates through the sleeving part, a ratchet wheel circumferentially fixed with the sleeving part is sleeved on the sleeving part, the handle is hinged on the installation shaft, and a connecting piece which is matched with the ratchet wheel and can drive the ratchet wheel to rotate when the handle swings is arranged on the handle. The handle articulates on the installation axle for the handle can be around the reciprocal swing of installation axle, and then relies on the connecting piece to drive the ratchet and rotate. Through the design, the linkage wheel also plays a role of connecting the ratchet wheel, so that power transmission from the ratchet wheel to the planet wheel can be realized only by one part, namely the linkage wheel, and the problem of reduction of use stability caused by accumulation of installation precision and manufacturing precision when a plurality of power transmission parts are arranged is avoided.

In the tensioner, the tightening wheel comprises a plate-shaped planet wheel fixing part and a main body part for the binding piece to wind, the planet wheel fixing part is sleeved at the end part of the main body part and is circumferentially fixed with the main body part, and the planet wheel is arranged on the side surface of the planet wheel fixing part, which is back to the main body part. This strainer mainly adopts the chain as the binding piece, and when adopting the chain, its main part can be comparatively complicated in order to cooperate with the chain, if the structure of direct forming connection planet wheel on the main part that the structure of own has been comparatively complicated, the processing technology requirement of needs is high. This strainer is through setting up the planet wheel fixed part and the main part that tighten up the wheel and set up to the components of a whole that can function independently structure for both can process respectively, and the processing technology requirement is lower, and can guarantee that the planet wheel fixed part has higher manufacturing accuracy, and then makes the planet wheel that sets up on the planet wheel fixed part have higher operation precision, guarantees that this strainer has higher stability in use.

In the tensioner, the inner teeth on the inner gear ring are arranged at one end of the inner peripheral wall of the inner gear ring, the width of the inner peripheral wall of the inner gear ring along the axial direction of the inner gear ring is larger than the width of the inner teeth along the axial direction of the inner gear ring, the inner peripheral wall of the inner gear ring without the inner teeth forms an annular supporting surface, the planet wheel fixing part is in a circular plate shape, and the planet wheel fixing part is rotatably arranged in the supporting surface of the inner gear. After the main body part and the planet wheel fixing part are manufactured in a split mode, although manufacturing accuracy is guaranteed, assembly errors exist between the main body part and the planet wheel fixing part. In order to avoid the influence of the installation precision of the planet wheel fixing part caused by the assembly error, the strainer is specially designed for the structure of the inner gear ring, an annular supporting surface is formed on the inner peripheral wall of the inner gear ring, the planet wheel fixing part is arranged in the supporting surface of the inner gear ring in a rotating mode, the radial position of the planet wheel fixing part is limited by the annular supporting surface, high concentricity is achieved between the planet wheel fixing part and the outer gear ring, and high meshing precision of the planet wheel and the inner teeth on the inner gear ring is guaranteed.

In the tensioner, the outer peripheral surface of the planet wheel fixing part is in clearance fit with the supporting surface, and the clearance is 0.15-0.35 mm. Preferably, the clearance between the outer peripheral surface of the planet wheel fixing part and the supporting surface is 0.25 mm. When the outer teeth of the planet wheel, the inner gear ring and the linkage wheel are machined, the machining of the teeth can inevitably have tolerance. Therefore, clearance fit is adopted between the outer peripheral face of the planet wheel fixing portion and the supporting face, so that the tooth clearance between the teeth meshed with each other can be subjected to micro-adjustment, physical deformation or abrasion of the teeth in the rotating process is avoided, the phenomenon of tooth biting is avoided, and the strainer is stable in use.

In the tensioner, the body comprises two side plates which are oppositely arranged, the inner wall of each side plate is fixedly connected with the inner gear ring, the linkage wheel mounting holes are formed in each side plate, the linkage wheel mounting holes in the two side plates are opposite to each other, the linkage wheels are arranged in the two linkage wheel mounting holes in a rotating mode, the two ends of the main body portion are respectively sleeved with a planet wheel fixing portion, a plurality of planet wheels are arranged on each planet wheel fixing portion in a rotating mode, and the two ends of the mounting shaft penetrate through the connecting holes of the two linkage wheels. Through such design for the both ends of tightening wheel all receive the support of linkage wheel, have guaranteed that tightening wheel stability is higher. Moreover, the same planetary wheel mechanism is arranged between each linkage wheel and the tightening wheel to drive the tightening wheel to rotate, the stress is balanced, the sharing of the force is formed, the stability of the operation process is good, the strength requirements of the inner gear ring, the planet wheel and the outer teeth on the linkage wheel are reduced, the phenomenon that the teeth of each part are bitten due to physical deformation is avoided, the use stability of the tensioner is further improved, and the tensioner can reach larger pre-tightening force.

In the tensioner, the connecting hole of the linkage wheel is a step hole, the large-diameter hole of the step hole is arranged at one end close to the meshing part, the two ends of the main body part of the tightening wheel are respectively provided with a cylindrical protruding part, and the protruding parts at the two ends of the main body part are respectively inserted into the large-diameter holes of the two linkage wheels. When the tensioner is used, the larger the pretightening force is, the larger the moment applied to the radial direction of the tightening wheel by the binding piece is. If the tightening wheel is only sleeved on the mounting shaft and does not have the matching relation with the linkage wheel, the radial torque borne by the linkage wheel is completely borne by the mounting shaft, so that the mounting shaft is easy to deform to cause the position of a planet wheel fixing part of the linkage wheel to change, and further the position precision of the planet wheel is influenced. And this strainer is because the interlocking wheel inlays to be established on the body, and through above design for the both ends of tightening wheel all receive the support of interlocking wheel, and the radial moment that the tightening wheel received just can transmit for the interlocking wheel finally is undertaken by the body like this, has avoided the condition that the planet wheel fixed part position of interlocking wheel changes, guarantees that planet wheel running accuracy is high, avoids appearing the phenomenon of stinging tooth, flank of tooth wearing and tearing, makes this strainer use stably, as preferred, the pore wall in big diameter hole forms clearance fit with the periphery wall of bulge.

In the tensioner, the sleeve joint part comprises a first annular part which is in an annular shape, a plurality of first limiting lugs are arranged on the peripheral wall of the first annular part along the circumferential direction, a first mounting opening sleeved on the sleeve joint part is arranged in the middle of the ratchet wheel, and first notches which are embedded with the first limiting lugs in a one-to-one correspondence mode are arranged on the opening edge of the first mounting opening. Through the cooperation of first installing port and first annular portion for the ratchet installation is stable, and through the cooperation that sets up first lug and first breach, realizes fixed circumference between ratchet and the portion of cup jointing, thereby makes ratchet and linkage wheel synchronous revolution.

In the tensioner, a plurality of second limiting lugs are arranged on the peripheral wall of the protruding portion along the circumferential direction, a second mounting opening sleeved on the protruding portion is formed in the middle of the planet wheel fixing portion, and second notches which are embedded with the second limiting lugs in a one-to-one correspondence mode are formed in the opening edge of the second mounting opening. Through the cooperation of second installing port and bulge for planet wheel fixed part installation is stable, and through the cooperation that sets up second lug and second breach, realizes that circumference is fixed between planet wheel fixed part and the main part, thereby makes planet wheel fixed part and main part synchronous revolution.

In the tensioner, the sleeving parts of the two linkage wheels are located at the outer sides of the corresponding side plates, the sleeving part of each linkage wheel is sleeved with a ratchet wheel, the handle comprises a handle part and two hinged plates which are arranged oppositely, one ends of the two hinged plates are connected with the handle part, hinge holes are formed in the other ends of the two hinged plates respectively, two ends of the mounting shaft penetrate through the hinge holes in the two hinged plates respectively, the connecting piece is a pulling plate which is in sliding connection with the two hinged plates, and the pulling plate can be embedded into or separated from the ratchet teeth of each ratchet wheel through the sliding of the pulling plate. Through such design for the handle can drive the ratchet synchronous rotation on two blocks of curb plates, and the atress is balanced, and has formed sharing of power, and the ratchet uses non-deformable for a long time, makes this strainer stable in utilization, long service life. The handle drives the ratchet wheel to rotate through the pulling plate, which belongs to the prior art. The sleeve joint portion of the linkage wheel is located on the outer side of the corresponding side plate, so that the ratchet wheel is also located on the outer side of the side plate, the space on the inner side of the side plate is made to be convenient for installation of the inner gear ring, and the tensioner has the advantages of being compact in structure and convenient to manufacture.

Compared with the prior art, the tensioner has the following advantages:

1. this strainer is through setting up the linkage wheel on the body to be equipped with planet wheel, outer ring gear and carry out power transmission between linkage wheel and hand tight wheel, utilized planetary reduction mechanism's principle, realized great reduction ratio, have the laborsaving some of operation, and under the prerequisite that the handle operating force does not increase, can realize great pretension value.

2. This strainer will inlay and locate on the body, consequently the linkage wheel also receives the support of body and radially is fixed, the tip of tightening wheel is pegged graft mutually with the linkage wheel simultaneously, make the binding piece apply for tightening up the radial moment of wheel and can transmit for the linkage wheel and finally be undertaken by the body, rather than relying on the installation axle to undertake, enable like this to tighten up the radial skew that can not take place of wheel, and then guarantee that the planet wheel operation precision of connecting above that is high, make this strainer on the basis of realizing great pretightning force, the advantage that has good stability in use, long service life.

3. Adopt the design of two sets of planetary gear mechanism bilateral symmetry in this strainer, the atress is balanced, and has formed sharing of power, not only makes operation process stability good, has reduced the intensity requirement of the outer tooth on ring gear, planet wheel and the linkage wheel moreover, and the dream is avoided the tooth of each part to appear physics and is out of shape and the phenomenon of biting the tooth appears, has further promoted the stability in use of this strainer, and makes this strainer can reach great pretightning force.

Drawings

Fig. 1 is a schematic perspective view of the tensioner.

Fig. 2 is a schematic perspective view of the tensioner.

Fig. 3 is a front view of the tensioner.

Fig. 4 is a cross-sectional view a-a of fig. 3.

Fig. 5 is an enlarged view at a in fig. 4.

Fig. 6 is a partial perspective view of the tensioner.

Fig. 7 is a partial exploded view of the present tensioner.

Fig. 8 is a schematic perspective view of a linkage wheel in the tensioner.

Fig. 9 is a schematic perspective view of a linkage wheel in the tensioner.

Fig. 10 is a perspective view of the main body of the tightening wheel in the tensioner.

Fig. 11 is a schematic perspective view of the tightening wheel connecting planetary wheel in the tensioner.

Fig. 12 is a schematic view of the connection structure of the tightening wheel, the outer gear ring, the linkage wheel and the planet wheel in the tensioner.

Fig. 13 is a schematic perspective view of the inner gear ring in the tensioner.

In the figure, 1, a body; 1a, a side plate; 1a1 and a linkage wheel mounting hole; 1b, a chain guide plate; 1c, a bottom plate; 2. a handle; 21. a hinge plate; 211. a hinge hole; 22. a handle; 3. installing a shaft; 4. a tightening wheel; 41. a planet wheel fixing part; 411. a second mounting opening; 412. a second notch; 42. a main body portion; 421. a projection; 422. a second limit bump; 5. a linkage wheel; 51. an engaging portion; 511. an outer tooth; 52. an installation part; 53. connecting holes; 531. a large diameter bore; 54. a socket joint part; 541. a first annular portion; 542. a first limit bump; 6. an inner gear ring; 61. internal teeth; 62. a support surface; 7. a planet wheel; 8. a ratchet wheel; 81. a first mounting port; 82. a first notch; 9. pulling a plate; 10. a chain; 11. a first hook is arranged; 12. and a second hook.

Detailed Description

The following is a specific embodiment of the present invention and is further described with reference to the accompanying drawings, but the present invention is not limited to this embodiment.

Example one

As shown in fig. 1 and 2, the tensioner comprises a body 1, a handle 2 and a chain 10, wherein the body 1 is further provided with a second hook 12. The body 1 includes two curb plates 1a that set up relatively and connects the chain guide 1b at two curb plates 1a front ends, is provided with installation axle 3 between two curb plates 1 a. The handle 2 comprises a handle part 22 and two oppositely arranged hinged plates 21, one ends of the two hinged plates 21 are connected with the handle part 22, and the other ends of the two hinged plates 21 are hinged on the mounting shaft 3. Two ends of the chain 10 penetrate through the two through holes in the chain guide plate 1b, and one end of the chain 10 is connected with a first hook 11.

As shown in fig. 3, 4 and 5, the other ends of the two hinge plates 21 of the handle 2 are respectively provided with a hinge hole 211, the two ends of the mounting shaft 3 respectively penetrate through the hinge holes 211 of the two hinge plates 21, and the bottom edges of the two side plates 1a of the body 1 are connected through a bottom plate 1 c. The middle part of installation axle 3 rotates the cover and is equipped with the tight wheel 4, it is equipped with a linkage wheel 5 still to rotate the cover respectively to lie in tight wheel 4 both sides on installation axle 3, two linkage wheels 5 are inlayed and are located two blocks of curb plates 1a of body 1 and can drive two linkage wheels 5 synchronous rotation through operating handle 2, the both ends tip of tight wheel 4 pegs graft mutually with corresponding linkage wheel 5, be equipped with external tooth 511 along circumference on the outer peripheral face of linkage wheel 5, an inner gear ring 6 has been linked firmly respectively on the inner wall of every curb plate 1a, inner gear ring 6 sets up with the axle center with linkage wheel 5, combine shown in fig. 7, it all meshes planet wheel 7 with external tooth 511 on the linkage wheel 5 and internal tooth 61 on the inner gear ring 6 still to be equipped with on the tight wheel.

Specifically, as shown in fig. 8 and 9, the linkage wheel 5 includes an engaging portion 51, an installation portion 52, and a sleeve portion 54, which are sequentially arranged along the axial direction, the sleeve portion 54 is connected to one side of the installation portion 52 opposite to the engaging portion 51, the linkage wheel 5 has connecting holes 53 through which both ends pass along the axial direction, and both ends of the installation shaft 3 respectively pass through the connecting holes 53 of the two linkage wheels 5. The external teeth 511 are arranged on the peripheral surface of the meshing portion 51, so that the meshing portion 51 is in a gear shape, the peripheral surface of the mounting portion 52 is a cylindrical surface, and with reference to fig. 4 and 5, each side plate 1a is provided with a linkage wheel mounting hole 1a1 matched with the mounting portion 52, linkage wheel mounting holes 1a1 on the two side plates 1a are opposite to each other, and the two linkage wheels 5 are respectively rotatably arranged in the two linkage wheel mounting holes 1a1 through the mounting portion 52. According to the tensioner, the installation part 52 with the cylindrical outer peripheral surface is directly formed on the linkage wheel 5, the installation part 52 is matched with the linkage wheel installation hole 1a1, so that the linkage wheel 5 can be ensured to have higher stability and installation accuracy after being installed, and the outer teeth 511 and the planet wheels 7 can be ensured to have higher meshing accuracy by directly arranging the outer teeth 511 on the linkage wheel 5.

As shown in fig. 4 to 6, the sleeving parts 54 of the two linkage wheels 5 are located at the outer sides of the corresponding side plates 1a, and the sleeving part 54 of each linkage wheel 5 is circumferentially fixedly sleeved with a ratchet wheel 8. Referring to fig. 1 and 2, the handle 2 is provided with a connecting member which is engaged with the ratchet 8 and drives the ratchet 8 to rotate when the handle 2 swings. Specifically, the connecting piece is a pulling plate 9 connected with the two hinge plates 21 in a sliding way, and the pulling plate 9 can be embedded into or separated from the ratchet teeth of each ratchet wheel 8 through the sliding of the pulling plate 9. Through such design for the handle 2 can drive the ratchet 8 synchronous rotation on two blocks of curb plates 1a, and the atress is balanced, and has formed sharing of power, and ratchet 8 uses non-deformable for a long time, makes this strainer use stable, long service life.

With reference to fig. 10 and 11 and 12, the tightening wheel 4 includes two circular plate-shaped planet wheel fixing portions 41 and a main body portion 42 for the binding member to wind, the two planet wheel fixing portions 41 are respectively sleeved at two ends of the main body portion 42 and circumferentially fixed with the main body portion 42, four planet wheels 7 are rotatably disposed on a side surface of each planet wheel fixing portion 41, which faces away from the main body portion 42, the four planet wheels 7 are disposed along the circumferential direction of the planet wheel fixing portion 41 at equal intervals, and the four planet wheels 7 are all engaged with the inner teeth 61 of the corresponding inner gear ring 6. This strainer is through setting up tightening wheel 4 to planet wheel fixed part 41 and main part 42 of components of a whole that can function independently structure for both can process respectively, and the processing technology requirement is lower, and can guarantee that planet wheel fixed part 41 has higher manufacturing accuracy, and then makes planet wheel 7 that sets up on planet wheel fixed part 41 have higher running accuracy, guarantees that this strainer has higher stability in use.

With reference to fig. 4, 9 and 10, the connection hole 53 of the linkage wheel 5 is a stepped hole, and the large diameter hole 531 of the stepped hole is disposed near one end of the engagement portion 51, the two ends of the main body portion 42 of the tightening wheel 4 are both provided with cylindrical protruding portions 421, the protruding portions 421 at the two ends of the main body portion 42 are respectively inserted into the large diameter holes 531 of the two linkage wheels 5, and the linkage wheels 5 and the tightening wheel 4 can rotate relatively. Because linkage wheel 5 inlays to be established on body 1, through above design for the both ends of tightening wheel 4 all receive linkage wheel 5's support, and the radial moment that tightening wheel 4 received just can transmit for linkage wheel 5 like this and finally be born by body 1, has avoided the condition that the planet wheel fixed part 41 position of linkage wheel 5 changes, guarantees that planet wheel 7 running accuracy is high, avoids appearing the phenomenon of biting tooth, flank of tooth wearing and tearing, makes this strainer use stably.

As shown in fig. 4 and 13, the internal teeth 61 on the internal gear ring 6 are disposed at one end of the internal circumferential wall of the internal gear ring 6, the width of the internal circumferential wall of the internal gear ring 6 in the axial direction of the internal gear ring 6 is greater than the width of the internal teeth 61 in the axial direction of the internal gear ring 6, the internal circumferential wall of the internal gear ring 6 without the internal teeth 61 forms an annular supporting surface 62, the planet wheel fixing portion 41 is in a circular plate shape, the planet wheel fixing portion 41 is rotatably disposed in the supporting surface 62 of the internal gear ring 6, and preferably, the outer circumferential surface of the planet wheel fixing portion 41 is in clearance fit. Of course, the gap may be increased or decreased as appropriate during actual manufacturing, and is typically between 0.15mm and 0.35 mm. After the main body portion 42 and the planetary wheel fixing portion 41 are manufactured separately, although the manufacturing accuracy is ensured, there is an assembly error between the two. In order to avoid the influence of the installation precision of the planet wheel fixing part 41 caused by the assembly error, the structure of the internal gear ring 6 is specially designed, an annular supporting surface 62 is formed on the inner peripheral wall of the internal gear ring 6, the planet wheel fixing part 41 is rotatably arranged in the supporting surface 62 of the internal gear ring 6, the radial position of the planet wheel fixing part 41 is limited by the annular supporting surface 62, the planet wheel fixing part 41 and an external gear 511 ring have high concentricity, and the planet wheel 7 and the internal gear 61 on the internal gear ring 6 are ensured to have high meshing precision. In addition, when the planet wheel 7, the inner gear ring 6 and the outer teeth 511 of the linkage wheel 5 are machined, the machining of the teeth inevitably has tolerance. Therefore, clearance fit is adopted between the outer peripheral surface of the planet wheel fixing portion 41 and the supporting surface 62, so that the backlash between the mutually meshed teeth can be subjected to micro adjustment, the physical deformation or abrasion of the teeth in the rotating process is avoided, the phenomenon of tooth biting is avoided, and the strainer is stable to use.

In order to realize the connection between the ratchet wheel 8 and the tightening wheel 4, as shown in fig. 6 and 8, the sleeving part 54 of the linkage wheel 5 includes a first annular part 541 in a circular shape, a plurality of first limiting protrusions 542 are circumferentially arranged on the outer peripheral wall of the first annular part 541, a first mounting opening 81 sleeved on the sleeving part 54 is arranged in the middle of the ratchet wheel 8, and first notches 82 which are correspondingly embedded with the first limiting protrusions 542 one to one are arranged on the edge of the first mounting opening 81. Through the cooperation of first installing port 81 and first annular portion 541 for ratchet 8 installation is stable, and through the cooperation that sets up first lug and first breach 82, realizes circumferentially fixed between ratchet 8 and the portion 54 that cup joints, thereby makes ratchet 8 and linkage wheel 5 rotate in step.

In order to realize the connection between the main body 42 of the linkage wheel 5 and the planet wheel fixing portion 41, as shown in fig. 10 and 11, a plurality of second limiting protrusions 422 are circumferentially arranged on the outer peripheral wall of the protruding portion 421, a second mounting opening 411 which is sleeved on the protruding portion 421 is arranged in the middle of the planet wheel fixing portion 41, and second notches 412 which are correspondingly embedded with the plurality of second limiting protrusions 422 are arranged on the opening edge of the second mounting opening 411. Through the cooperation of second mounting hole 411 and bulge 421 for planet wheel fixed part 41 installs stably, and through the cooperation that sets up second lug and second breach 412, realizes circumferentially fixed between planet wheel fixed part 41 and the main part 42, thereby makes planet wheel fixed part 41 and main part 42 synchronous rotation.

When the tensioner is used, the chain 10 is wound on the tightening wheel 4 in advance, then the operating handle 2 drives the linkage wheel 5 to rotate, the outer peripheral surface of the linkage wheel 5 is circumferentially provided with the outer teeth 511, so the planet wheel 7 can be driven to rotate, the inner gear ring 6 is fixed on the body 1 and cannot rotate, the planet wheel 7 can revolve around the linkage wheel 5 while rotating, at the moment, the planet wheel 7 is connected to the tightening wheel 4, so the tightening wheel 4 can be driven to rotate, and the binding piece is gradually pre-tightened. The tensioner utilizes the principle of a planetary reduction mechanism, realizes a large reduction ratio, and can realize a large pre-tightening force value on the premise that the operating force of the handle 2 is not increased.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although 1, ontology is used more herein; 1a, a side plate; 1a1 and a linkage wheel mounting hole; 1b, a chain guide plate; 1c, a bottom plate; 2. a handle; 21. a hinge plate; 211. a hinge hole; 22. a handle; 3. installing a shaft; 4. a tightening wheel; 41. a planet wheel fixing part; 411. a second mounting opening; 412. a second notch; 42. a main body portion; 421. a projection; 422. a second limit bump; 5. a linkage wheel; 51. an engaging portion; 511. an outer tooth; 52. an installation part; 53. connecting holes; 531. a large diameter bore; 54. a socket joint part; 541. a first annular portion; 542. a first limit bump; 6. an inner gear ring; 61. internal teeth; 62. a support surface; 7. a planet wheel; 8. a ratchet wheel; 81. a first mounting port; 82. a first notch; 9. pulling a plate; 10. a chain; 11. a first hook is arranged; 12. hooks, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. A tensioner comprises a body (1), a handle (2) and an installation shaft (3) arranged on the body (1), wherein a tightening wheel (4) is rotatably sleeved on the installation shaft (3), it is characterized in that a linkage wheel (5) is also rotatably sleeved on the side part of the mounting shaft (3) positioned on the tightening wheel (4), the linkage wheel (5) is embedded on the body (1) and can drive the linkage wheel (5) to rotate through the operating handle (2), the end part of the tightening wheel (4) is inserted with the linkage wheel (5) and the two wheels can rotate relatively, outer teeth (511) are arranged on the outer peripheral surface of the linkage wheel (5) along the circumferential direction, an inner gear ring (6) which is coaxial with the linkage wheel (5) is fixedly connected to the body (1), and the tightening wheel (4) is provided with a planet wheel (7) which is engaged with the outer teeth (511) on the linkage wheel (5) and the inner teeth (61) on the inner gear ring (6).

2. The tensioner according to claim 1, wherein the linkage wheel (5) comprises a meshing portion (51) and a mounting portion (52) which are sequentially arranged along the axial direction, the linkage wheel (5) is provided with a connecting hole (53) which is penetrated through by two ends along the axial direction, the external teeth (511) are arranged on the peripheral surface of the meshing portion (51), the peripheral surface of the mounting portion (52) is a cylindrical surface, the body (1) is provided with a linkage wheel mounting hole (1a1) matched with the mounting portion (52), and the mounting portion (52) is rotatably arranged in the linkage wheel mounting hole (1a 1).

3. A tensioner according to claim 2, characterized in that a sleeve part (54) is further connected to the side of the mounting part (52) facing away from the engaging part (51), the connecting hole (53) penetrates through the sleeve part (54), a ratchet wheel (8) fixed circumferentially to the sleeve part (54) is sleeved on the sleeve part (54), the handle (2) is hinged to the mounting shaft (3), and a connecting part which is matched with the ratchet wheel (8) and can drive the ratchet wheel (8) to rotate when the handle (2) swings is arranged on the handle (2).

4. A tensioner according to claim 3, characterised in that the tightening wheel (4) comprises a plate-shaped planet wheel fixing portion (41) and a main body portion (42) for the binding member to wind around, the planet wheel fixing portion (41) is sleeved on the end of the main body portion (42) and fixed circumferentially with the main body portion (42), and the planet wheel (7) is arranged on the side of the planet wheel fixing portion (41) facing away from the main body portion (42).

5. The tensioner according to claim 4, wherein the inner teeth (61) of the inner gear ring (6) are arranged at one end of the inner peripheral wall of the inner gear ring (6), the width of the inner peripheral wall of the inner gear ring (6) along the axial direction of the inner gear ring (6) is larger than the width of the inner teeth (61) along the axial direction of the inner gear ring (6), the inner peripheral wall of the inner gear ring (6) without the inner teeth (61) forms an annular supporting surface (62), the planet wheel fixing part (41) is in a circular plate shape, and the planet wheel fixing part (41) is rotatably arranged in the supporting surface (62) of the inner gear ring (6).

6. A tensioner according to claim 5, characterised in that the outer peripheral surface of the planet wheel fixed part (41) is in clearance fit with the support surface (62) and the clearance is 0.15mm-0.35 mm.

7. The tensioner according to claim 4, wherein the body (1) comprises two side plates (1a) which are arranged oppositely, the inner wall of each side plate (1a) is fixedly connected with one of the inner gear rings (6), each side plate (1a) is provided with the linkage wheel mounting hole (1a1), the linkage wheel mounting holes (1a1) in the two side plates (1a) are opposite to each other, the number of the linkage wheels (5) is two, the two linkage wheels (5) are rotatably arranged in the two linkage wheel mounting holes (1a1) respectively, the two ends of the main body part (42) are sleeved with the planet wheel fixing parts (41) respectively, each planet wheel fixing part (41) is rotatably provided with a plurality of planet wheels (7), and the two ends of the mounting shaft (3) respectively penetrate through the connecting holes (53) of the two linkage wheels (5).

8. The tensioner according to claim 4, characterized in that the connecting hole (53) of the linkage wheel (5) is a stepped hole and the large diameter hole (531) of the stepped hole is arranged near one end of the meshing part (51), the two ends of the main body part (42) of the tensioning wheel (4) are provided with cylindrical protruding parts (421), and the protruding parts (421) at the two ends of the main body part (42) are respectively inserted into the large diameter holes (531) of the two linkage wheels (5).

9. The tensioner according to claim 3, wherein the socket portion (54) comprises a first annular portion (541) having a circular ring shape, a plurality of first limit protrusions (542) are circumferentially arranged on the outer peripheral wall of the first annular portion (541), the middle portion of the ratchet wheel (8) is provided with a first mounting opening (81) which is sleeved on the socket portion (54), and the opening edge of the first mounting opening (81) is provided with first notches (82) which are correspondingly embedded with the plurality of first limit protrusions (542) one by one.

10. A tensioner according to claim 8, characterized in that a plurality of second limit protrusions (422) are circumferentially arranged on the outer peripheral wall of the protrusion (421), the middle part of the planet wheel fixing part (41) is provided with a second mounting opening (411) which is sleeved on the protrusion (421), and the opening edge of the second mounting opening (411) is provided with second notches (412) which are correspondingly embedded with the plurality of second limit protrusions (422) in a one-to-one manner.

11. A tensioner according to claim 7, characterized in that the socket parts (54) of the two linked wheels (5) are located outside the corresponding side plates (1a), the socket part (54) of each linked wheel (5) is sleeved with a ratchet wheel (8), the handle (2) comprises a handle part (22) and two hinged plates (21) which are arranged oppositely, one end of each hinged plate (21) is connected with the handle part (22), the other end of each hinged plate (21) is provided with a hinge hole (211) respectively, two ends of the mounting shaft (3) respectively penetrate through hinge holes (211) on the two hinge plates (21), the connecting piece is a pulling plate (9) which is connected with the two hinged plates (21) in a sliding way, the pulling plate (9) can be embedded into the ratchets of each ratchet wheel (8) or can be separated from the ratchets of each ratchet wheel (8) through the sliding of the pulling plate (9).