CN208457133U - A kind of chain stretching device - Google Patents

Abstract

The utility model relates to a kind of chain stretching devices, including bracket component (10), sprocket wheel (20), fastener (30) and sprocket wheel central siphon (40), the sprocket wheel (20) is set on sprocket wheel central siphon (40), fastener (30) passes through sprocket wheel central siphon (40), and sprocket wheel (20) is supported in bracket component (10).The utility model has the advantages that: structure is simple, compresses chain using sprocket wheel, ensure that each chain link is in the same plane when chain drive, and can compress from inside to outside, can also compress from outside to inside, easy to operate.

Description

A kind of chain stretching device

Technical field

The utility model belongs to the technical field of mechanical transmission, and in particular to a kind of chain stretching device.

Background technique

Chain drive is one of most common kind of drive in current mechanical equipment, in lifting equipment, parking apparatus, passenger-cargo Chaindriven figure is seen everywhere in the equipment such as elevator, automobile or mechanism.With chaindriven frequent use, due to chain, chain The problem of abrasion of wheel causes is also more and more, due to that can be plastically deformed after chain long-time stress, so that it is elongated, seriously When also occur that and jump tooth, fall the phenomenon that chain, interrupted so as to cause transmission process and even occur accident.Traditional sprocket tensioning structure Sprocket wheel to be fixed on bracket with bolt after artificial tensioning to achieve the purpose that tensioning, this tension structure it is inconvenient and And large labor intensity.

Chinese utility model creates the chain introduced in " chain stretching device " (Authorization Notice No.: 202901191 U of CN) Tensioning apparatus compresses the chain for generating plastic deformation using sliding block, but thus it cannot be guaranteed that chain is still in same plane, such as Fruit chain in the same plane, is not easy to produce de- chain, falls the phenomenon that chain.

Chinese utility model creates introduction in " a kind of sprocket tension device " (Authorization Notice No.: 204083102 U of CN) Sprocket tension device, can only outside-in compressed, and if installation space is limited, need to carry out from Inside To Outside When tensioning, such structure just seems helpless.

Utility model content

The purpose of this utility model is to provide a kind of chain stretching devices, to solve skill present in above-mentioned background technique Art problem.

To achieve the above object, the utility model provides the following technical solutions: a kind of chain stretching device, comprising: bracket Component, sprocket wheel, fastener and sprocket wheel central siphon, the sprocket wheel are set on sprocket wheel central siphon, and fastener passes through sprocket wheel central siphon, by sprocket wheel It is supported in bracket component.

Further, the bracket component includes tensioning frame and backstand, and tool is there are four face on the tensioning frame, and first It is provided with the opening for chain disengaging on face and third face, is provided with the first kidney slot on the second face, is arranged on fourth face There are multiple first through hole；The second kidney slot and multiple second through-holes, first kidney slot and are provided on the backstand Two kidney slots are used for across fastener, and the first through hole and the second through-hole are used for through bolt and nut cooperation, by tensioning frame the Four sides and backstand are secured together.

Further, the fastener includes screw bolt and nut.

Preferably, the fastener further includes plain cushion and elastic cushion, and the elastic cushion is arranged between nut and plain cushion.

Further, the sprocket wheel central siphon, which includes two, has and manages between step, it is each between pipe path partial insertion chain Take turns in intermediate mounting hole, it is each between the diameter of large diameter portion of pipe be greater than the mounting hole internal diameter among sprocket wheel.Using pipe Mode, convenient for sprocket wheel to be installed on tensioning frame.

Compared with prior art, the utility model has the beneficial effects that the stability of 1, raising chain drive, is reduced mechanical Failure；2, chain tension is easy to operate, strong operability；3, structure is simple, compresses chain using sprocket wheel, ensure that chain passes Each chain link is in the same plane when dynamic；4, chain can be both compressed from inside to outside when running, and can also compress chain from outside to inside Item.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model chain stretching device.

The perspective view of the explosion of Fig. 2 Fig. 1 chain stretching device.

In figure: 10- bracket component, 11- tensioning frame, the first kidney slot of 111-, 112- opening, 113- opening, 114- first Through-hole, 12- backstand, the second kidney slot of 121-, the second through-hole of 122-, 20- sprocket wheel, 30- fastener, 31- bolt, 32- nut, 33- elastic cushion, 34- plain cushion, 40- sprocket wheel central siphon, 41- large diameter portion, 42- path part.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, to the technical solution in the embodiments of the present invention into Row clearly and completely describes, it is clear that and the described embodiments are only a part of the embodiments of the utility model, rather than all Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise Under every other embodiment obtained, fall within the protection scope of the utility model.

As depicted in figs. 1 and 2, a kind of chain stretching device of the utility model, including it is bracket component 10, sprocket wheel 20, tight Firmware 30 and sprocket wheel central siphon 40, the sprocket wheel 20 are set on sprocket wheel central siphon 40, and fastener 30 passes through sprocket wheel central siphon 40, by sprocket wheel 20 are supported in bracket component 10.

Specifically, bracket component 10 includes tensioning frame 11 and backstand 12, in one embodiment, outside support component 10 Shape is rectangular box shape, is tightened together by tensioning frame 11 and backstand 12 by screw bolt and nut.Have on tensioning frame 11 There are four face, it is provided with the opening (112,113) for chain disengaging on opposite the first face and third face, is set on the second face It is equipped with the first kidney slot 111, multiple first through hole 114 are provided on fourth face, in one embodiment, there are 6 first to lead to Hole 114 is respectively classified into two column, 3 first through hole 114 of each column.It of courses, first through hole 114 is also possible to 6 or more, depends on Depending on the fixed effect that those skilled in the art are pursued in design；The second kidney slot 121 and more is provided on backstand 12 A second through-hole 122, the second kidney slot 121 is similar to the size and shape of the first kidney slot 111, the first kidney slot 111 and Two kidney slots 121 pass through for accommodating fastener 30 and fastener are allowed to be fastened on bracket component 10, the first through hole 114 It is used to cooperate by bolt and nut with the second through-hole 122,11 fourth face of tensioning frame and backstand 12 is secured together.

The shape of bracket component 10 is also possible to triangle or the polygon greater than quadrangle, and no matter what it has Shape, it all has such structure: the space being put into for sprocket wheel 20, and for chain disengaging opening (112,113).

In one embodiment, fastener 30 includes bolt 31 and nut 32.Fastener 30 is also possible to other and is easy to tear open The fastening structure unloaded, such as bolt and threaded sleeve connection structure.During chain drive, vibration can be generated, at this time bolt Loosening can be generated between 31 and nut 32, thus will affect the transmission efficiency of sprocket wheel chain, in order to prevent this loosening, bolt 31 ends are made into rounded cap shape, and the root of bolt 31 is made into square shape, and the side length of square is just caing be compared to the second through-hole 122 Width wants short, and square catercorner length is longer than the width of the second through-hole 122, and such bolt root can be limited to second Without can rotate in through-hole 122.Meanwhile it being additionally provided with elastic cushion 33 and plain cushion 34 in the inside of nut 5, the setting of elastic cushion 33 exists Between nut 32 and plain cushion 34.

In one embodiment, sprocket wheel central siphon 40 include two have step between manage, so-called in the utility model Guan the casing being exactly spaced apart, for setting up separately in the components two sides that some needs to position, in the present embodiment, between each Pipe all has the part there are two different outer dias, is called large diameter portion 41 and path part 42 respectively, the path part of pipe In mounting hole among 42 insertion sprocket wheels 20, it is each between the diameter of large diameter portion 41 of pipe be greater than the mounting hole among sprocket wheel 20, Sprocket wheel 20 is positioned on fastener 30 by pipe between the right and left to heading in this way, unless between adjustment pipe position, the otherwise chain Wheel can only circumferentially rotate, and there can be no axial movements.By the way of pipe, it is convenient for sprocket wheel 20 between on 20 both sides of sprocket wheel It is installed on bracket component 10, position of the adjustment sprocket wheel 20 on bracket component 10 is also convenient for, to realize the sprocket wheel 20 and chain Item is coplanar.

A kind of application method of chain stretching device of the utility model: first chain is penetrated by opening (112,113) To the centre of bracket component 10, then this chain stretching device is fixed in the side wall using the equipment of sprocket chain device, Position of the fastener 30 on kidney slot (111,121) is adjusted, to determine the height and position of sprocket wheel 20, and is adjusted using flat shim 34 Position of the whole pipe on fastener 30, so that it is determined that the horizontal position of sprocket wheel.By the sprocket wheel of chain and the chain stretching device 20 engage, and chain in use for some time, will generate plastic deformation and fluff, and adjust fastener 30 at this time in kidney slot Position on (111,121), so that it may realize the tensioning again of chain.

For the ease of installation, the middle section of backstand 12 is recessed inwardly along vertical direction, and the depth being recessed compares spiral shell The thickness of the bolt head of bolt 31 is big, thus can the bolt head of bolt 31 after mounting will not encounter in the side wall of equipment, protect Demonstrate,prove the normal operation of equipment.The connection bolt between backstand 12 and tensioning frame 11, bolt head are located at tensioning frame 11 simultaneously Inside.

After in the side wall that the tensioning apparatus is mounted on equipment, the position of possible sprocket wheel 20 and plane where chain are not It is that thus will affect transmission effect in same plane, so pipe and tensioning frame 11 between being located at first on bolt 31 Between, manage between second and be set with multiple plain cushions 34 between backstand 12, the quantity of the plain cushion 34 is according to actual operation requirements To determine.In this way by increasing or reducing the quantity of plain cushion 34, to realize that sprocket wheel 20 is coplanar with chain.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (7)

1. a kind of chain stretching device, it is characterised in that: including bracket component (10), sprocket wheel (20), fastener (30) and sprocket wheel Central siphon (40), the sprocket wheel (20) are set on sprocket wheel central siphon (40), and fastener (30) passes through sprocket wheel central siphon (40), by sprocket wheel (20) it is supported in bracket component (10).

2. chain stretching device as described in claim 1, it is characterised in that: the bracket component (10) includes tensioning frame (11) With backstand (12), tool is provided with for chain disengaging there are four face on the first face and third face on the tensioning frame (11) It is open (112,113), is provided with the first kidney slot (111) on the second face, is provided with multiple first through hole on fourth face (114)；The second kidney slot (121) and multiple second through-holes (122), first kidney slot are provided on the backstand (12) (111) it is used for the second kidney slot (121) across fastener (30), the first through hole (114) and the second through-hole (122) are used for By the cooperation of bolt and nut, tensioning frame (11) fourth face and backstand (12) are secured together.

3. chain stretching device as claimed in claim 1 or 2, it is characterised in that: the fastener (30) includes bolt (31) With nut (32).

4. chain stretching device as claimed in claim 3, it is characterised in that: the fastener (30) further includes elastic cushion (33) With plain cushion (34), the elastic cushion (33) is arranged between nut (32) and plain cushion (34).

5. chain stretching device as claimed in claim 1 or 2, it is characterised in that: the sprocket wheel central siphon (40) includes two tools Have and manage between step, it is each between pipe the intermediate mounting hole of path part (42) insertion sprocket wheel (20) in, it is each between pipe major diameter Partially the diameter of (41) is greater than sprocket wheel (20) intermediate mounting hole internal diameter.

6. chain stretching device as claimed in claim 3, it is characterised in that: the sprocket wheel central siphon (40), which includes two, has platform Managed between rank, it is each between pipe the intermediate mounting hole of path part (42) insertion sprocket wheel (20) in, it is each between pipe large diameter portion (41) diameter is greater than sprocket wheel (20) intermediate mounting hole internal diameter.

7. chain stretching device as claimed in claim 4, it is characterised in that: the sprocket wheel central siphon (40), which includes two, has platform Managed between rank, it is each between pipe the intermediate mounting hole of path part (42) insertion sprocket wheel (20) in, it is each between pipe large diameter portion (41) diameter is greater than sprocket wheel (20) intermediate mounting hole internal diameter.