CN2178300Y

CN2178300Y - Variable speed chain joint device

Info

Publication number: CN2178300Y
Application number: CN93218800U
Authority: CN
Inventors: 王文滨
Original assignee: YABAN CHAIN INDUSTRIAL Co Ltd
Current assignee: YABAN CHAIN INDUSTRIAL Co Ltd
Priority date: 1993-07-13
Filing date: 1993-07-13
Publication date: 1994-09-28
Anticipated expiration: 2003-07-13

Abstract

The utility model relates to a variable speed chain joint device which can be tightly cooperated. The utility model comprises a buckling piece and a connection shaft piece, wherein, the proper positions of both sides of the buckling piece are respectively provided with an opening, the outer part of the opening is narrow, and the inner part of the opening is wide. Both ends of a hole wall are provided with tapers, the circle centers of curved demi bodies on both sides of the connection shaft piece are respectively fixedly provided with a connection shaft, the upper end of the connection shaft is provided with a concave groove, and both ends of a wall face of the concave groove are provided with corresponding tapers. The width of the concave groove is just equal to the thickness of the buckling piece. Two openings on the buckling piece are used for being tabled with the tapers which are corresponding to the connection shaft of the connection shaft piece, the utility model can be tightly joined and be not loosened. In addition, the outer parts of the openings are narrow, the inner parts of the openings are wide, and the ends of the openings are provided with tapers.

Description

Variable speed chain joint device

The utility model relates to a kind of speed-changing chain piecing devices that closely cooperate, and refers to tight, the chimeric tab device that gets loose of firmly being difficult for of a kind of winding especially.

General chain is to link its two ends with a tab device after finishing, and becoming the polyphone round, and tab is installed in conjunction with its lamellar body of back also with the chain transmission of assembling, and has the function identical with chain; Be with, tab must be firmly in conjunction with the two ends of chain, and must with chain to connect axle closely chimeric fixing, otherwise,, stir because of the intercalation of sprocket in the transmission most probably and get loose when tab during with chain transmission, cause the whole piece chain thereby break, badly influence rider's safety.

Chain joint sheet device comparatively generally commonly used at present, shown in Fig. 7,8, system connects a sheet B phase buckle joint by a snapping sheet A and and forms, wherein, snapping sheet A forms two conjugate foramen A1, A1 ' in both sides, and these two conjugate foramen A1, A1 ' are occured simultaneously by big hole A11, A11 ' and a small sircle hole A12, A12 ' respectively to form mutually, and its two small sircle hole A12, A12 ' all are positioned at two outer side of lamellar body; Meet a sheet B and set firmly two at its both sides circle centre position and meet a B1, B1 ', and in meeting the end formed chase B1 ' 1 of a B1, B1 ', B11 '; Wherein, the slightly larger in diameter of above-mentioned big hole A11, A11 ' connects a B1, B1 ' apical margin end in this, in order to being inserted in; The diameter of small sircle hole A12, A12 ' is then just identical with the chase B11, the B11 ' external diameter that meet a B1, B1 ', just can rabbet cooperation; When this tab device assembling, the end that system earlier connects one a B1 is inserted in the big hole A11 among the conjugate foramen A1 of snapping sheet A, pass to side again, make its end chase B11 and small sircle hole A12 tabling, meet a B1 with two again, B1 ' presses to central authorities, make its spacing dwindle, pass big hole A11 ' with another conjugate foramen A1 ' that snapping sheet A is gone up and be inserted in the chase B11 ' that another connects a B1 ' end, and after the power that presses disappears, this meets two on the sheet B and meets a B1, B1 ' promptly struts to two outsides, make snapping sheet A that tight buckle is in meeting a B1, the chase B11 of B1 ', on the B11 ', and be able to fixed location.

But above-mentioned chain head sheet device of commonly seeing, though the chain two ends can be connected fixing, its buckle combination still can produce in conjunction with phenomenon insecure, that easily get loose, division is as follows now:

Because of the diameter of big hole A11, the A11 ' of conjugate foramen A1, A1 ' on the snapping sheet A greater than the diameter that connects a B1, B1 ' end that meets a sheet B1, if in running, this meets a sheet B and is subjected to external force to cause two to meet a B1, B1 ' and inwardly press and dwindle its spacing, then snapping sheet A very easily bullet take off and pitch, cause chain to break and fall;

2. this connects the thickness that two width that meet chase B11, the B11 ' of a B1, B1 ' on the sheet B are slightly larger than snapping sheet A, snapping sheet A has a slippage to rock the space after combination, easily wear and tear mutually with the chase B11, the B11 ' that meet a B1, B1 ', Jing and enlarge the last small sircle hole A12 of snapping sheet A, the aperture of A12 ' easily causes and comes off;

3. when more than this tab device applies to variable speed during the chip fluted disc, because of chain lies in different big small tooth plate up conversions, be the situation that is oblique transmission, the tooth peak of fluted disc very easily inserts this snapping sheet A and connects crack between the sheet B therebetween, take off and cause sled, make the joining place disengaging of chain pitch.

The purpose of the utility model is to overcome commonly uses the shortcoming that the chain joint device exists, and provides a kind of winding tight, the chimeric speed-changing chain piecing devices that get loose of firmly being difficult for.

The purpose of this utility model is achieved by following technical solution.Offer of the symmetrical perforate of a centre respectively at snapping sheet both sides suitable position, and the hole wall of this perforate is all established a taper part up and down for narrow inner width outside outwards convergent is than major diameter; Connect a sheet connect axle up the end suitable position be provided with upper and lower end and all have ring-type chase with the corresponding taper of taper up and down of the perforate of snapping sheet; Corresponding to connecing axle when chimeric, connect the last chase taper of axle just and be located at taper on the perforate hole wall two ends on the snapping sheet and be and closely cooperate at the snapping sheet, make the snapping sheet not have the anxiety that gets loose with connecing firm combination of a sheet.

The utility model also can be designed to bending a little with connecing a sheet in addition, connects tension force outside the axle to increase by two, and then makes the snapping sheet more firm with the combination that connects axle.

Thin bilge construction and practical effect about the utility model now exemplify a preferred embodiment and elaborate as follows in conjunction with the accompanying drawings.In the accompanying drawings,

Fig. 1 is an embodiment's of the present utility model perspective exploded view;

Fig. 2 is an embodiment's of the present utility model assembled sectional view;

Fig. 3 is that embodiment's of the present utility model joint is implemented schematic representation;

Fig. 4 illustrates another variation example that connects a sheet of the present utility model;

Fig. 5 illustrates another embodiment of the utility model;

Fig. 6 illustrates another embodiment's of the utility model perspective exploded view;

Fig. 7 is a combination top view of commonly using the tab device;

Fig. 8 is an assembled sectional view of commonly using the tab device;

At first consult Fig. 1, chain joint device of the present utility model comprises a snapping sheet 1 and and connects 2 two members of a sheet, wherein:

Snapping sheet 1 is an oval lamellar body, the perforate 11 of offering narrow inner width outside respectively at the both sides suitable position, this two perforate 11 is bigger at adjacent circumferential place diameter, the outer end diameter is less, it is slightly larger than the end diameter that connects axle 21 than Outside diameter, then less than connecing axle 21 end, and its hole wall 12 upper and lower end all are provided with taper 121 than small end;

Connect a sheet 2 and respectively set firmly one at both sides arc bending body circle centre position and connect axle 21, be provided with a chase 211 connecing axle 21 upper end, and the wall two ends of this chase 211 also are provided with taper 212, and the chase width is just identical with the thickness of snapping sheet 1; Also can in the middle of connecing a sheet 2, establish camber slightly, the two free-ended spacings that connect axle 21 are strengthened, can protect bigger permanent tension when connecing axle 21 with 1 combination of snapping sheet in the hope of making.

During combination, as shown in Figure 2, when chain joint device of the present utility model when being connected the two ends of chain 3, earlier chain 3 two ends are nested with respectively two connecing on the axle 21 of connecing a sheet 2, again the broad nose end of the perforate 11 of snapping sheet 1 partly is inserted in and connects axle 21 ends and inwardly pass, make the small end aperture of perforate 11 be partially submerged in the chase 211 that connects axle 21, along with, inwardly press two and connect axle 21, its spacing is dwindled, embed another with another perforate 11 and connect on the axle 21 and be fastened the not fastening of snapping sheet 1.Connect after power is eliminated outside the axle 21 pressing two, connect axle 21 and promptly reply the perforate 11 that closely compresses snapping sheet 1, and match, can reach and cause tight chimeric effect by the taper 212 of the taper 121 on perforate 11 hole walls 12 with the chase 211 that connects axle 21.And the A/F that connects the chase 212 of axle on 21 equates with the thickness of snapping sheet 1, thus a snapping sheet 1 and connect spools 21 and just do not have the gap, thereby the anxiety of fricton-tight abrasion.Moreover, as shown in Figure 3, when chain 3 is assembled, can pass to connect axle 21 earlier at one of chain 3 end, a perforate 11 one of in the snapping sheet 1 is placed in its bigger end connect on the axle 21 again, riveting is fixed a little will to connect axle 21 ends then, make that snapping sheet 1 is unexpected to be deviate from, treat to be made up by aforementioned step again when chain 3 is desired winding,, reach firm effect fast in order to do reaching assembling to promote its assembling speed.

In addition, the utility model also can be designed to have slightly camber with connecing a sheet 2, as shown in Figure 4, the two free-ended spacings that connect axle 21 are increased, its purpose is to make the two answer tension force that connect axle 21 to increase, with perforate 11 and the projection 112 and the chimeric more tight of chase 211 that connects axle 21 and shrinkage pool 221 and firm that forces snapping sheet 1.

Moreover, the utility model also has another embodiment, as shown in Figure 5, its snapping sheet is held under hole wall 12 and is designed to the right angle, to form monolateral taper 121, and axle 21 the chase 211 that connects that connects a sheet 2 is designed to corresponding taper 212, lower end and is designed to the right angle with corresponding with the cross-sectional configuration of the perforate 11 of snapping sheet 1 in the upper end, also be steady status when making snapping sheet 1 and connecing axle 21 assemblings.

In addition, snapping sheet 1 of the present utility model also can slightly change with the form that connects a sheet 2, and as shown in Figure 6, narrow peritreme is established a flat face 111 outside the perforate 11 of snapping sheet 1 both sides, and the prominent projection 112 of establishing; Then be designed to the straight vertical surface 22 of a correspondence in the end that connects axle 21 that connects a sheet 2, and offer a shrinkage pool 221 at vertical surface 22 suitable positions with respect to external side brim; Utilize projection 112 on this flat face 111 to be fastened on to connect in the shrinkage pool 221 of vertical surface 22 of axle 21,, increase the joint tightness of integral joint sheet and must not bullet take off and pitch to form the button effect of pulling.

In sum, the utility model utilizes perforate on the snapping sheet by gradually little greatly design, and hole wall matches with the taper that connects a chase, can make the combination of piecing devices more certain, reach that assembling closely cooperates, the chimeric effect that gets loose of being difficult for firmly and in conjunction with the back lamellar body, therefore, the utility model is one to have the new device of novelty and practicability concurrently really.All utilization taper principles cause close-fitting characteristic person of the present utility model to reach, and all belong to the category of the utility model.

Claims

1, a kind of speed-changing chain piecing devices that closely cooperate are to connect a sheet by a snapping sheet and to be constituted; Wherein, the snapping sheet is an oval lamellar body, connects a sheet and then respectively sets firmly one in its two sides arc bending body circle centre position and connect axle; It is characterized in that:

This snapping sheet is offered the symmetrical perforate of a centre for narrow inner width outside outwards convergent is than major diameter respectively at the both sides suitable position, and the hole wall of this perforate is all established a taper part up and down;

This connect a sheet connect axle up the end suitable position be provided with upper and lower end and all have ring-type chase with the corresponding taper of taper up and down of the perforate of snapping sheet;

Corresponding to connecing axle when chimeric, connect the last chase taper of axle just and be located at taper on the perforate hole wall two ends on the snapping sheet and be and closely cooperate at the snapping sheet, make the snapping sheet not have the anxiety that gets loose with connecing firm combination of a sheet.

2, by the described speed-changing chain piecing devices that can closely cooperate of claim 1; It is characterized in that this connects a sheet and has camber, so that the two free-ended spacings that connect axle increase, make it the bigger answer tension force of tool, the snapping sheet of order interlocking can closely be detained solid cooperation.

3, by the described speed-changing chain piecing devices that can closely cooperate of claim 1; The perforate that it is characterized in that this snapping sheet is designed to have monolateral taper, and the chase that connects on the axle of Pei Heing also is designed to have corresponding monolateral taper with it,

4, by the described speed-changing chain piecing devices that can closely cooperate of claim 1; It is characterized in that narrow peritreme is designed to a flat face outside the perforate of this snapping sheet, and the prominent projection of establishing, connect a sheet connect the axle then relative position is designed to a straight vertical surface in the end, and establish a shrinkage pool at its suitable position, utilize the projection on this flat face to be fastened in the shrinkage pool of the vertical surface that connects axle, detain the effect of pulling to form.