A kind of novel circular arc chain and sprocket wheel
Technical field
The invention belongs to the technical field of transmission device, relate in particular to a kind of novel circular arc chain and sprocket wheel.
Background technique
Chain mainly is made up of interior sheet, outer plate and bearing pin; Through accomplishing the transmission of power with sprocket wheel or gear meshing, can existing chain form that line contact or the some contact with sprocket wheel or gear, cause the soundness deficiency that meshes; Chain is prone to come off from sprocket wheel or gear, and the friction abnormal sound is very big.Simultaneously, less because of the surface of contact of line contact or some contact, the contacting point is easy to wear, influences the working life of chain, sprocket wheel or gear.
Notification number discloses a kind of toothed chain that is used on the motorcycle power transmission for the patent of " CN201772018U "; The interior sheet of toothed chain is triangular in shape; Have two connecting through holes on the interior sheet of said toothed chain, two connecting through holes lay respectively in sheet near first peripheral angles and the second peripheral angles place, interior sheet is made up of four arcs; Each peripheral angles place is respectively one section circular arc, adopts arc transition between first peripheral angles and second peripheral angles; The outer plate of toothed chain is quadrilateral; Have two attachment holes on the outer plate of said toothed chain; Two attachment holes are positioned at the two adjacent angles (i.e. first angle and second angle) of outer plate to be located, and outer plate is made up of four arcs, and first angle and second angle are respectively one section circular arc; Adopt arc transition between first angle and second angle, four arcs is located in addition between two adjacent angles (i.e. the 3rd angle and the 4th angle).But still there is following problem in this patent: 1, adopt arc transition between first peripheral angles of interior sheet and second peripheral angles, cause stress to concentrate easily; 2, the 3rd angle of outer plate and the 4th angle are two wedge angles, cause near the toothed chain other component to break easily and damage; 3, in use, have the gap that silt enters into toothed chain and sprocket wheel, increase the roughness between toothed chain and the sprocket wheel, increase the wearing and tearing of toothed chain and sprocket wheel.
Notification number discloses a kind of sprocket wheel that is used on the motorcycle power transmission for the patent that " CN201712760U " discloses, and the gear teeth tooth top of its sprocket wheel is cambered surface, and on the end face of the gear teeth, be provided with guide ledges.But still there is following problem in this patent: because of after chain uses a period of time, chain can deform, and slightly is longer than initial length; And guide ledges is only in two between the sheet during space; The effect of the guiding of just getting up, after using a period of time, guide ledges is space between the sheet in two no longer just; But contact with interior sheet, be easy to take place to jump tooth and fracture; The teeth groove of sprocket wheel and tooth top are not to adopt arc transition but the obtuse angle transition, in the process of motion, and the motion of sheet in the obtuse angle can hinder, the obtuse angle can produce bigger friction with interior sheet, has accelerated the wearing and tearing of interior sheet, simultaneously with bigger abnormal sound sound.
Summary of the invention
The technical problem that the present invention will solve provides a kind of novel circular arc chain and sprocket wheel, can guarantee that chain-driven is more stable, can get rid of the silt between chain and the sprocket wheel simultaneously, has reduced the abnormal sound in the work engineering.
In order to solve the problems of the technologies described above, the present invention provides following technological scheme: a kind of novel circular arc chain comprises interior sheet, outer plate, bearing pin and places the wear-resistant interior pipe in the bearing pin; Connect through bearing pin between interior sheet, the outer plate, said interior sheet is triangular in shape, and sheet has three peripheral angles and three peripheries in this; Have two connecting through holes on the interior sheet, sheet was near first peripheral angles and the second peripheral angles place in two connecting through holes laid respectively at, and the edge of each peripheral angles is arc section; The work tooth of sheet is the 3rd peripheral angles in said; The part of said work tooth for participating in transmission and contacting with sprocket wheel is provided with lightening core near the 3rd peripheral angles place, is changeover portion between interior sheet first peripheral angles and second peripheral angles; The stage casing of changeover portion is a straight line, and both sides are camber line; Said outer plate is quadrilateral, and this outer plate has the side between four angles and four angles, has two attachment holes on the outer plate; Two attachment holes are positioned at first angle and second angle of outer plate; Remaining angle is followed successively by the 3rd angle and the 4th angle, and the edge of first angle, second angle, the 3rd angle and the 4th angle is arc section, and the side between side between first angle and second angle and the 3rd angle and the 4th angle is the arc transition that concaves; Also be provided with mud hole on the said outer plate; The position of said mud hole is corresponding with the tooth top position of sprocket wheel, and outer plate is concordant with the top of interior sheet, and the height of interior sheet is greater than the height of outer plate.Be distributed with lightening hole on the above-mentioned chain institute matching used sprocket wheel, the edge shape of the shape of sprocket indentations and interior sheet the 3rd peripheral angles is complementary, said wear-resistant in pipe be jointless structure.
Compared with prior art; The invention has the advantages that: the stage casing of 1 changeover portion is a straight line, has avoided the stress between first peripheral angles and second peripheral angles to concentrate, as has adopted other transient modes; Limit certainly will appear; What receive because of first peripheral angles of interior sheet and the second peripheral angles place is pulling force, is under pressure between first peripheral angles and second peripheral angles, and interior sheet is prone to split from limit; 2, the 3rd angle of outer plate and the 4th angle have become two circular arcs by two acute angles, have protected near other component circular arc toothed chain effectively, prevent that its adjacent component from being scratched by acute angle, prevent that simultaneously other component from being stabbed by wedge angle and cause breaking and damaging; 3, the height of interior sheet has prevented the too high of outer plate and near other component of damage toothed chain greater than the height of outer plate; 4, in the course of the work, have the gap that silt enters into toothed chain and sprocket wheel, along with the transmission of chain and sprocket wheel, silt can be extruded to the edge of sprocket wheel gradually, and the lightening core on the outer plate can be taken the silt at the edge of taking turns out of like a cork.5, removed the guide ledges on the sprocket wheel, prevented that chain is by the guide ledges roof fall on the sprocket wheel.6, be distributed with lightening hole on the sprocket wheel, can alleviate the weight of sprocket wheel effectively; 7, the teeth groove of sprocket wheel and tooth top be by the camber line transition, and when motion, the abnormal sound when having reduced friction has effectively strengthened its glide power, prolonged chain working life; 8, wear-resistant interior pipe is jointless structure, has reduced the wearing and tearing of bearing pin, has prolonged the working life of chain.
Further, the quantity of said interior sheet is two, establishes the packed layer of engineering plastics or aluminum alloy between the two interior sheets, but weight reduction and friction noise.
Further, said sprocket wheel is processed by metallic material, and is durable more.
Further, said sprocket wheel is processed by aluminum alloy, has alleviated the weight of sprocket wheel itself.
Description of drawings
Below in conjunction with accompanying drawing and embodiment technological scheme of the present invention is further specified:
Fig. 1 is interior sheet embodiment's in novel circular arc chain of the present invention and the sprocket wheel a structural representation;
Fig. 2 is outer plate embodiment's in novel circular arc chain of the present invention and the sprocket wheel a structural representation;
Fig. 3 is novel circular arc chain of the present invention and sprocket wheel middle sprocket embodiment's a structural representation;
Fig. 4 is the embodiment's of novel circular arc chain of the present invention and sprocket engagement a structural representation.
Embodiment
Like Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, a kind of novel circular arc chain of the present invention comprises interior sheet 1, outer plate 2, bearing pin and places the wear-resistant interior pipe 10 in the bearing pin; Connect through bearing pin between interior sheet 1, the outer plate 2, said in sheet 1 triangular in shape, sheet 1 has three peripheral angles and three peripheries in this; Have two connecting through holes, 3, two connecting through holes 3 on the interior sheet 1 and lay respectively at interior sheet 1 near first peripheral angles and the second peripheral angles place, the edge of each peripheral angles is arc section; The work tooth of sheet 1 is the 3rd peripheral angles in said; The part of said work tooth for participating in transmission and contacting with sprocket wheel is provided with lightening core 4 near the 3rd peripheral angles place, is changeover portion between interior sheet 1 first peripheral angles and second peripheral angles; The stage casing of changeover portion is a straight line, and both sides are camber line; Said outer plate 2 is quadrilateral; This outer plate 2 has the side between four angles and four angles; Have two attachment holes, 5, two attachment holes 5 on the outer plate 2 and be positioned at first angle and second angle of outer plate 2, remaining angle is followed successively by the 3rd angle and the 4th angle; The edge of first angle, second angle, the 3rd angle and the 4th angle is arc section; Side between side between first angle and second angle and the 3rd angle and the 4th angle is the arc transition that concaves, and also is provided with mud hole 6 on the said outer plate 2, and the position of said mud hole 6 is corresponding with the tooth top of sprocket wheel 9 positions; Outer plate 2 is concordant with the top of interior sheet 1, and the height of interior sheet 1 is greater than the height of outer plate 2.With five equilibrium on the above-mentioned chain matching used sprocket wheel four lightening holes 7 are arranged, the edge shape of the shape of sprocket indentations 8 and interior sheet 1 the 3rd peripheral angles is complementary.The quantity of sheet 1 is two in said, is provided with stuffing between the two interior sheets 1, and said stuffing is engineering plastics or aluminum alloy, but equal weight reduction of these two kinds of stuffing and friction noise.Said wear-resistant interior pipe 10 is a jointless structure, has reduced the wearing and tearing of bearing pin, has prolonged the working life of chain.Said sprocket wheel is processed by aluminum alloy, from heavy and light and durable.
During work; The 3rd peripheral angles of interior sheet 1 contacts with sprocket indentations 8, and the edge shape of the shape of sprocket indentations 8 and interior sheet 1 the 3rd peripheral angles is complementary, and teeth groove 8 is contacted with interior sheet 1 formation face; Make transmission more reliable; Outer plate 2 is positioned at the both sides of sprocket wheel tooth top 9, plays guiding, is not easy to take place slot (be chain from sprocket wheel on landing).Straight transitions is adopted in first peripheral angles of interior sheet 1 and the changeover portion stage casing between second peripheral angles, limit can not occur, under same pulling force and pressure effect, is difficult for splitting.In running; Have the gap that silt enters into toothed chain and sprocket wheel; Along with the transmission of chain and sprocket wheel, silt can be extruded to the edge of sprocket wheel gradually, can utilize the relative movement between chain and the sprocket wheel that the silt at the edge of wheel is taken out of through the mud hole on the outer plate 26.Removed the guide ledges on the sprocket wheel, prevented that chain from by the guide ledges roof fall on the sprocket wheel, having reduced the wearing and tearing in the chain long-time running.The 3rd angle of outer plate 2 and the 4th angle be for to have become two circular arcs by two wedge angles, protected near other component one-tenth toothed chain effectively, prevents that other component from being stabbed by wedge angle and cause breaking and damaging.The height of interior sheet 1 has prevented the too high of outer plate 2 and near other component of damage toothed chain greater than the height of outer plate 2, when the present invention is applied on the motorcycle actuating unit, can protect retaining ring and flying trident effectively.
In the present invention, first peripheral angles, second peripheral angles, the 3rd peripheral angles, first angle, second angle, the 3rd angle and the 4th angle are merely to be described convenient and expression that adopt is relative position, but not to the absolute limitations of its position.
For a person skilled in the art, under the prerequisite that does not break away from structure of the present invention, can also make some distortion and improvement, these also should be regarded as protection scope of the present invention, and these can not influence effect and practical applicability that the present invention implements.