CN104633002A - Chain sheet structure - Google Patents

Abstract

The invention discloses a chain sheet structure, wherein, the two ends of a chain sheet body are provided with combining parts, the combining parts are provided with a shaft hole, the inner side surface between the two combining parts is provided with a waist which is relatively bulged towards the outer side surface and is sunken and thinned, the joint of the waist and the two combining parts is provided with an arc-shaped connecting surface, the inner edge and the outer edge of the connecting surface generate two arc lines, the two arc lines form a double arc-shaped interval arrangement state, the two connecting surfaces form an outward-expanded leading-in surface along the two edges of the chain sheet body, more than one convex block is connected between the two connecting surfaces, the two sides of the waist are provided with relatively inclined opening parts which are positioned between the two leading-in surfaces, and the design of the two convex blocks can rapidly guide the meshing speed change of chain teeth of a fluted disc and stabilize the chain transmission.

Description

chain structure

technical field

The invention relates to a chain piece structure, in particular to a chain piece with a protruding block design which can contribute to fast-guided tooth plate meshing shifting and stable transmission.

Background technique

In order to make the chain for general bicycles fit accurately with the chainring, each chain tooth of the chainring can be cut into the space between the two outer chain pieces, so as to reduce the failure of the chain teeth due to the shaking of the chain or the vibration of the bicycle. Therefore, the distance between the two outer chain pieces is usually increased to adapt to the speed change of the bicycle at a higher driving speed. Please refer to Figure 11 and Figure 12. The existing chain includes two pieces The outer chain pieces A arranged in opposite groups and the two inner chain pieces B arranged oppositely in groups are arranged at intervals, and are pivotally connected to each other by the chain axis C. The two ends of the outer chain pieces A are respectively provided with an arc-shaped joint A1 Between the two joint parts A1, there is a waist A2 that is relatively raised from the inner side to the outer side, and a linear connecting surface A3 is provided at the joint between the waist A2 and the two joint parts A1, so that the There will be a larger lead-in space between the two outer chain pieces A of the chain, so that the chain can be smoothly shifted at a higher driving speed.

However, it has been found in actual use that although the above-mentioned chain structure has a wider lead-in distance to adapt to the speed change at a higher driving speed, it still has the following defects:

1. Due to the combination of the raised waist A2 formed by punching and the linear connection surface A3, stress concentration is likely to occur at the bend between the raised waist A2 of the outer chain piece A and the connection surface A3, As a result, the outer chain sheet A is at risk of breaking from the bend.

2. The guiding distance E1 between the waist A2 of the two outer chain pieces A is too large, so after the chain is engaged with the chainring, the allowable range of the deflection angle of the chain during transmission is too large, so that the chain will move to the left Or swing to the right, which can cause vibration, noise or chain detachment.

3. Since the connection between the waist A2 and the two joints A1 is a straight connection surface A3, and the sprocket D1 of the general chainring D is in an arc shape (as shown in Figure 13), it is therefore suitable for this The linear connection surface A3 of the chain will make it difficult for the sprocket D1 of the chainring D to snap in, which will hinder the rotation of the chain, and in severe cases will cause the chain to come off.

Therefore, the structure of the outer chain piece A of the above-mentioned existing chain has poor effect when used in shifting gears.

In view of this, the inventor of the present invention aimed at many shortcomings and inconveniences caused by the imperfect design of the above-mentioned chain piece structure, conceived deeply, and actively researched and improved the trial production to develop and design this case.

Contents of the invention

The object of the present invention is to provide a chain plate structure with a protruding block design that can facilitate the gear meshing speed change and stable transmission of the fast guiding chainring.

In order to achieve the above object, the solution of the present invention is:

A chain piece structure, which includes: a chain piece body, two ends of the chain piece body are respectively provided with a joint part opposite to each other, a shaft hole is provided on the joint part, and a sunken waist is provided on the joint part. Between the above-mentioned two joint parts, the connection between the waist and the two joint parts is respectively provided with an arc-shaped connection surface, and at least one protruding block is indirectly provided between the two connection surfaces, and the The protruding block is higher than the waist.

The inner and outer edges of the connecting surface respectively form two circular arcs at the joints of the waist and the two joints.

The two circular arcs form a state of equidistant arrangement of double circular arcs.

The two connection surfaces are respectively formed with an outwardly expanding introduction surface along the two edges of the link body.

The two edges of the waist are respectively provided with two opposite inclined openings, and the openings are located between the two opposite introduction surfaces.

The waist is relatively raised and thinner from an inner side of the chain piece body to an outer side.

The waist portion is relatively concave and thinner from an inner side of the chain piece body to an outer side, and the outer side is set to be flat.

The chain piece body is an outer chain piece or an inner chain piece.

The connecting surface is a slope or a plane.

The slopes gradually incline from the joint portion toward the waist.

After adopting the above structure, the chain piece structure of the present invention has the following advantages: 

1. In the present invention, the waist is set in a relatively raised concave and thinner state, which can widen the introduction distance between the two oppositely assembled chain pieces, so that it can be guided more quickly when changing gears. The teeth of this chainring snap into mesh smoothly.

2. The present invention utilizes the relatively small guiding distance between the protruding blocks between the two chain plate bodies, so that the tip of the chain tooth of the chainring can be kept limited therein, so that no deviation will occur during chain transmission. shake, vibration, noise or chain detachment.

3. The present invention utilizes a connecting surface with a double-arc design to form a leading-in surface with a larger outward expansion, and utilizes the double-arc peripheral edges of the inner and outer edges of the connecting surface to cooperate with the design of the toothed disc. The chain tooth is corresponding to the arc-shaped peripheral edge, so that when the speed is changed, the chain tooth can be quickly guided through the opening along the double-arc connecting surface and the introduction surface formed by expansion. fits inside this waist for easy shifting.

4. The present invention utilizes the design of the double-arc connecting surface, which can effectively disperse the stress without causing the chain to break during operation due to excessive stress concentration, so as to avoid the danger caused by it.

5. The present invention can also utilize the design of the double-arc connecting surface, so that the chain piece body can completely cover the chain teeth, so as to increase the stability and smoothness during driving, and avoid vibration and shaking. 

Description of drawings

Fig. 1 is the three-dimensional exterior view of the present invention;

Fig. 2 is the top view of the present invention;

Fig. 3 is the three-dimensional appearance diagram that the present invention is assembled into a chain;

Fig. 4 is the sectional view after the present invention is assembled into chain;

Fig. 5 is a schematic diagram of a chain meshing with a chainring according to the present invention;

Fig. 6 is a schematic diagram of the tip of the chain tooth of the present invention obliquely snapping into the lead-in distance of the two chain piece bodies;

Fig. 7 is a schematic diagram showing that the tip of the chain tooth of the present invention is limited within the guiding distance between the two protruding blocks;

Fig. 8 is a three-dimensional appearance view of the first chain piece body according to another embodiment of the present invention;

Fig. 9 is a three-dimensional appearance view of the back of the second chain piece body according to another embodiment of the present invention;

Fig. 10 is a three-dimensional appearance view of another embodiment of the present invention assembled into a chain;

Fig. 11 is the three-dimensional appearance diagram of existing outer chain piece;

Fig. 12 is the three-dimensional exterior view of existing chain;

Fig. 13 is a schematic diagram of a conventional chain meshing with a chainring.

Symbol Description

1 Chain body 11 Joint part 12 Shaft hole

13 Waist 14 Connection surface 15 Arc line

16 Lead-in surface 17 Protruding block 18 Opening

1A first link body 11A first joint part 12A first shaft hole

13A first waist 14A first connection surface 15A first arc

16A first lead-in surface 17A first protruding block 18A first opening

1B second link body 13B second waist A outer link

A1 junction A2 waist A3 connection surface

B inner chain piece C chain shaft D chainring

D1 sprocket D2 tip part E lead-in pitch

E1 lead spacing.

Detailed ways

In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific examples.

Please refer to FIG. 1 , the embodiment of the present invention is provided with a chain piece body 1, and the two ends of the chain piece body 1 are provided with opposite arc-shaped joints 11, and the joint portion 11 is provided with a through shaft hole 12. , and the inner surface between the two joints 11 is provided with a waist 13 that is concave and thinner relative to the outer surface, and the connection between the waist 13 and the two joints 11 is respectively provided with an arc-shaped The connection surface 14, the connection surface 14 can be an inclined surface or a plane, the present embodiment is described as an inclined surface, the connection surface 14 is gradually inclined from the joint portion 11 towards the waist portion 13, and the inner surface of the connection surface 14 is utilized , the outer edge, two arc lines 15 will be produced at the joints with the waist 13 and the two joints 11 respectively, and the two arc lines 15 will form an equidistantly arranged double arc-shaped state, and the The two connecting surfaces 14 form a relatively large outwardly expanding introduction surface 16 along the two edges of the chain body 1, and at least one protruding block 17 is indirectly provided between the two connecting surfaces 14, and the protruding block 17 is higher than the waist 13 , and oppositely inclined openings 18 are respectively provided on two edges of the waist 13 , and the openings 18 are located between the two opposite introduction surfaces 16 .

When assembling, as shown in Figure 3, the chain body 1 is set as the structure of an outer chain in this embodiment, and an inner chain B is jointly implemented in addition (the chain body 1 can also be set as an inner chain) ), the chain piece body 1 is matched with an inner chain piece B to form a pair of opposite intervals, and then a chain shaft C is used to pivotally connect the chain piece bodies 1 and the inner chain piece B one by one , so as to be assembled into a chain, so as to be used for meshing transmission and speed change with the sprocket D1 of a chainring D (as shown in Figure 5).

During use, as shown in Fig. 4 and Fig. 5, when it intends to carry out gear shift engagement, since the connection between the waist 13 of the chain piece body 1 and the two joint parts 11, a pair of arc-shaped connecting surfaces 14 are provided. , can have a larger opening 16 that expands outward, and the double arc-shaped peripheral edge of the connecting surface 14 can just cooperate with the sprocket D1 that is also set as the corresponding circular arc-shaped peripheral edge of the tooth plate D, so that, When driving and changing gears, the sprocket D can be quickly guided into the opening along the double-arc connection surface 14 and the expanded introduction surface 16 when it is engaged in rotation. 18, and snap into the space between the waists 13 of the two link bodies 1, due to the sunken and thinned waist 13, the introduction distance E between the two relatively assembled chain bodies 1 can be changed more Wide, therefore, when it is shifting, because the tapered tip D2 of the sprocket D1 obliquely snaps into the introduction distance E of the two chain pieces 1 (as shown in Figure 6), using the two There is a wider introduction distance E between the waists 13, which can guide the sprocket D1 of the chainring D to snap into engagement more quickly; The protruding block 17 has a small guiding distance E1, which can quickly guide the chain and keep the tip D2 of the sprocket D1 of the chainring D within it (as shown in Figure 7). In order to avoid offset shaking when the chain is driven, it can further achieve rapid speed change, reduce vibration, reduce noise and avoid chain detachment.

And because the connecting surface 14 between the waist 13 of the chain piece body 1 and the two joints 11 is set as a double circular arc, so there will be no shortcoming of excessive concentration of stress, so that the chain can be dispersed during operation. Stress, and will not have a linear connection surface like the existing chain piece, which is easy to break from its bend, so this case does not have the risk of easy fracture; and the double-arc connection surface 14, in addition to The sprocket D1 of the sprocket D can be quickly introduced out of the double arc-shaped connecting surface 14, and the chain body 1 can completely cover the sprocket D1, so as to increase the stability and stability during driving. Smoothness can avoid vibration and shaking during operation.

In another embodiment of the present invention, as shown in FIG. 8, a first chain body 1A is configured as an inner chain structure, and the two ends of the first chain body 1A are provided with opposite arc-shaped first joints. part 11A, the first joint part 11A is provided with a through first shaft hole 12A, and the inner side between the two first joint parts 11A is provided with a first waist part 13A which is relatively concave and thinner toward the outer side, And the outer surface of the first link body 1A is set to be flat, and the connection between the first waist 13A and the two first joints 11A is respectively provided with a first connecting surface 14A in the shape of a circular arc, and The first connection surface 14A gradually inclines from the first joint portion 11A toward the first waist portion 13A, using the inner and outer edges of the first connection surface 14A to connect with the first waist portion 13A and the two first joint portions respectively. The connection of 11A will produce two first arc lines 15A, and the two first arc lines 15A will form a double arc-shaped state arranged equidistantly, and the two first connecting surfaces 14A along the first The two edges of a link body 1A form a first introduction surface 16A that expands outwards, and a first protruding piece 17A is provided between the two first connecting surfaces 14A. The first protruding piece 17A is as high as Out of the first waist portion 13A, oppositely inclined first openings 18A are respectively provided on both edges of the first waist portion 13A, and the first openings 18A are located between the two opposite first introduction surfaces 16A. .

A second chain piece body 1B is configured as an outer chain piece structure, as shown in FIG. It is relatively concave and thinner, but the outer surface of the second link body 1B is flat.

When assembling, as shown in FIG. 10 , the present embodiment cooperates with the first chain body 1A and the second chain body 1B to implement together, which forms the first chain body 1A and the second chain body 1B into a group. The first chain body 1A and the second chain body 1B are pivotally connected to each other with a chain shaft C, so as to assemble into a chain, so as to be used as a chain with a chainring. The teeth are used for meshing transmission and speed change.

The above-mentioned embodiments and drawings do not limit the form and style of the product of the present invention, and any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims (10)

1. a chain chip architecture, it is characterized in that, include: a chain sheet body, the two ends of described chain sheet body are respectively provided with a relative connecting part, described connecting part is provided with an axis hole, and the waist of a depression is located between two described connecting parts, and the joint of this waist and two described connecting parts is respectively equipped with the junction surface of a circular arc, be equipped with at least more than one casting lug thereon between two described junction surfaces, and described casting lug thereon is above described waist.

2. chain chip architecture as claimed in claim 1, is characterized in that: the inside and outside edge of described junction surface, can produce two circular arc lines respectively respectively with the joint of described waist and two described connecting parts.

3. chain chip architecture as claimed in claim 2, is characterized in that: two described circular arc lines form the state of the Gothic arrangement of an equidistant arrangement.

4. chain chip architecture as claimed in claim 1, is characterized in that: two described junction surfaces are formed with an approaching face expanded outwardly respectively along the two edges of this chain sheet body.

5. chain chip architecture as claimed in claim 4, is characterized in that: the two edges of described waist are respectively equipped with two relatively in skewed opening portion, and described opening part is between this two relative approaching face.

6. chain chip architecture as claimed in claim 1, is characterized in that: described waist is thinning in protuberance relatively to an outer side surface by an inner side surface of this chain sheet body.

7. chain chip architecture as claimed in claim 1, is characterized in that: described waist is opposing recesses and thinning by an inner side surface of this chain sheet body to an outer side surface, and described outer side surface is set in as a flat condition.

8. chain chip architecture as claimed in claim 1, is characterized in that: described chain sheet body is an outer chain sheet or an inner chain sheet.

9. chain chip architecture as claimed in claim 1, is characterized in that: described junction surface is an inclined-plane or plane.

10. chain chip architecture as claimed in claim 9, is characterized in that: described inclined-plane is tilted towards this waist gradually by described connecting part respectively.