TWI531738B - Chain section structure - Google Patents

Description

Chain construction

The present invention relates to a chain construction, and more particularly to a chain having a projecting block design that can facilitate the rapid engagement of the sprocket and the stable transmission of the sprocket.

In general, the chain for bicycles can be precisely matched with the toothed disc, so that each chain tooth of the toothed disc can be surely cut between the two outer links, and the chain teeth can be reduced due to chain sway or bicycle vibration. The probability of timely cutting, so the spacing between the two outer links is usually increased to accommodate the shifting of the bicycle at higher driving speeds. Please refer to Figures 13 and 14, the conventional chain includes Two sets of oppositely disposed outer link pieces (A) and two sets of oppositely disposed inner link pieces (B) are spaced apart and pivotally connected to each other by a chain axis (C), and the aforementioned outer link pieces (A) The ends are respectively provided with a circular arc-shaped joint portion (A1), and the two joint portions (A1) are provided with a waist portion (A2) which is oppositely raised from the inner side surface to the outer side surface, and the waist portion (A2) and the two joint portions respectively The connection point of (A1) is provided with a straight connecting surface (A3), so that the outer connecting pieces (A) of the chain will have a larger width of the introduction pitch, so that the chain can be higher. Smooth shifting at driving speed.

However, in actual use, it has been found that although the above chain structure has a wider introduction pitch to accommodate shifting at higher driving speeds, the following drawbacks are still derived:

1. The waist portion (A2) formed by the stamping is formed by the combination of the straight connecting surface (A3), so that the waist portion (A2) of the outer chain piece (A) is raised between the waist portion (A2) and the connecting surface (A3). The bending is prone to stress concentration, which causes the outer link (A) to break from the bend.

2. The guiding distance (E1) between the waist portions (A2) of the two outer chain pieces (A) is too large, so that the allowable range of the yaw angle of the chain during transmission is excessively large after the chain is engaged with the toothed plate. The chain will yaw to the left or right, causing vibration, noise or unchaining.

3. Since the connection between the waist portion (A2) and the two joint portion (A1) is a straight connecting surface (A3), the sprocket (D1) of the general toothed disc (D) is an arc. The shape (as shown in the fifteenth figure), so the linear connecting surface (A3) of the chain will make the sprocket (D1) of the sprocket (D) not easy to get stuck, and the chain will rotate. Obstruction, severe cases will cause de-chaining.

Therefore, the above-mentioned conventional chain outer chain piece (A) structure is not effective in shifting use.

Therefore, in view of the currently used chain structure, the above-mentioned various kinds of defects, the present invention provides a chain structure, which is provided with a chain body, and the two ends of the chain body are respectively provided with a relative combination a joint portion is provided with a shaft hole, a waist portion is disposed between the two joint portions, and a joint portion of the waist portion and the second joint portion is respectively provided with a circular arc-shaped connecting surface. At least one protruding block is connected between the two connecting faces, and the protruding block is higher than the waist.

The inner and outer edges of the connecting surface respectively generate two circular arc lines at the junction with the waist portion and the two joint portions.

The above two circular arc lines form an arrangement of double arcs arranged in an equidistant arrangement.

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

The two edges of the waist portion are respectively provided with two oppositely inclined openings, and the opening portion is located between the two opposite introduction faces.

The waist portion is recessed and thinned from the inner side of one side of the chain body toward the outer side.

The waist portion is relatively recessed and thinned from an inner side of the one side of the chain body, and the outer side surface is formed in a flat shape.

The above chain system is an outer chain or an inner chain.

The connecting surface is a slope or a plane.

The inclined planes are gradually inclined toward the waist by the joint portion.

The invention has the following advantages:

1. The present invention utilizes the aspect in which the waist portion is formed as a depression and is thinned relative to the ridge, so that the introduction pitch between the two oppositely assembled chain main bodies can be widened, so that the shifting speed can be made faster. The sprocket guiding the toothed disc is smoothly engaged.

2. The invention utilizes the opposite protruding blocks between the two link body bodies to have a small guiding distance, so that the tip end portion of the sprocket of the toothed disc can be kept limited therein, so as to avoid the partial deviation of the chain transmission. Move, shake, noise or unchain.

3. The present invention utilizes a connecting surface having a double arc design to form a lead-in surface having a large outward expansion, and a double arc-shaped peripheral edge of the inner and outer edges of the connecting surface can be used to match the toothed disc. The sprocket is formed as a corresponding arc-shaped peripheral edge, so that the sprocket can be quickly guided through the opening along the connecting surface of the double circular arc and the expanded introduction surface thereof during shifting. The card is engaged in the waist to facilitate shifting.

4. The invention utilizes the double arc-shaped connecting surface design to effectively disperse the stress without breaking the chain during operation due to excessive stress concentration, thereby avoiding danger.

5. The invention can also utilize the double arc-shaped connecting surface design, so that the chain body can completely cover the fastener element to increase the stability and smoothness during running, and avoid vibration and shaking.

(1) ‧‧‧Legoscope body

(11) ‧ ‧ joints

(12)‧‧‧Axis hole

(13) ‧‧‧ Waist

(14)‧‧‧ Connection surface

(15)‧‧‧Arc lines

(16) ‧‧‧Import

(17) ‧‧‧ protruding blocks

(18) ‧‧‧ openings

(1A)‧‧‧First chain body

(11A) ‧ ‧ First Joint Department

(12A)‧‧‧First shaft hole

(13A) ‧‧‧First waist

(14A)‧‧‧First connection surface

(15A)‧‧‧First arc line

(16A) ‧‧‧ first introduction surface

(17A)‧‧‧First protruding block

(18A)‧‧‧First opening

(1B)‧‧‧Second chain body

(13B)‧‧‧Second waist

(2A)‧‧‧First chain body

(21A) ‧ ‧ First Joint Department

(23A) ‧‧‧First waist

(24A) ‧‧‧ first connection surface

(27A)‧‧‧First protruding block

(2B)‧‧‧Second chain body

(21B) ‧ ‧ second joint

(23B)‧‧‧Second waist

(24B)‧‧‧Second connection surface

(27B)‧‧‧Second protruding block

(A) ‧ ‧ outer chain

(A1) ‧ ‧ joints

(A2) ‧ ‧ waist

(A3)‧‧‧ Connection surface

(B) ‧ ‧ inner link

(C)‧‧‧Chain

(D) ‧ ‧ toothed disc

(D1)‧‧‧ sprocket

(D2) ‧ ‧ tip

(E)‧‧‧Introduction spacing

(E1) ‧ ‧ leading spacing

[First figure] is a perspective view of the present invention.

[Second figure] is a top view of the present invention.

[Third image] is a three-dimensional appearance of the invention assembled into a chain.

[Fourth figure] is a cross-sectional view of the present invention after it is assembled into a chain.

[Fifth Figure] is a schematic view of the chain of the present invention engaged with a toothed disc.

[Sixth] is a schematic view in which the tip end portion of the fastener element of the present invention is obliquely inserted into the lead-in space of the two-chain main body.

[Seventh figure] is a schematic view in which the tip end portion of the sprocket of the present invention is confined within the guiding distance of the two protruding blocks.

[Eighth image] is a perspective external view of a first chain body according to another embodiment of the present invention.

[9th] is a perspective external view of the back surface of the second link body according to another embodiment of the present invention.

[Tenth Graph] is a perspective external view assembled into a chain according to another embodiment of the present invention.

[11th] A perspective view of a first chain body according to still another embodiment of the present invention.

[Twelfth Figure] A perspective view of a second chain body according to still another embodiment of the present invention.

[Thirteenth image] is a three-dimensional appearance of a conventional outer chain piece.

[Fourteenth] is a three-dimensional appearance of a conventional chain.

[Fifteenth Figure] is a schematic view of a conventional chain engaging a toothed disc.

Referring to the first figure, the embodiment of the present invention is provided with a chain body (1), and the two ends of the chain body (1) are provided with opposite arc-shaped joints (11), the joints ( 11) a through shaft hole (12) is disposed thereon, and an inner side surface between the two joint portions (11) is provided with a waist portion (13) which is concave and thinned toward the outer side, and the waist portion (13) The connecting portion with the two joint portions (11) is respectively provided with a connecting surface (14) having a circular arc shape, and the connecting surface (14) can be a slope or a flat surface, and the embodiment is designed to be a sloped surface. It is to be noted that the connecting surface (14) is gradually inclined by the joint portion (11) toward the waist portion (13), and the joint is utilized. The inner and outer edges of the joint (14) respectively form a second circular arc line (15) at the junction with the waist portion (13) and the two joint portions (11), and the two circular arc lines (15) Forming an equidistant arrangement of double arcs, and the two connecting faces (14) form a larger outwardly expanding introduction surface (16) along the two edges of the chain body (1). And at least one protruding block (17) is connected between the connecting faces (14), the protruding block (17) is higher than the waist (13), and the waist (13) is the second The edges are respectively provided with relatively inclined openings (18) which are located between the two opposite introduction faces (16).

When combined, as shown in the third figure, in this embodiment, the chain body (1) is configured as an outer chain piece, and is additionally implemented by an inner chain piece (B), which is the chain piece. The main body (1) is arranged with a pair of inner chain pieces (B) at a distance of two and two, and then the chain body (1) and the inner chain piece (B) are respectively one by one with a chain axis (C) They are pivotally connected to each other to be assembled into a chain for meshing transmission and shifting with the sprocket (D1) of a toothed disc (D) (as shown in the fifth figure).

When in use, as shown in the fourth and fifth figures, when it is intended to perform the shifting engagement, due to the connection between the waist portion (13) of the chain body (1) and the two joint portions (11), It is a pair of arc-shaped connecting faces (14), which can have a large outwardly expanding opening portion (18), and the double arc-shaped peripheral edge of the connecting surface (14) can match the toothed disc (D) The sprocket (D1) corresponding to the circumference of the circular arc is also set, so that when the gear is to be shifted, the sprocket (D1) can be rotated along the double arc-shaped connecting surface. (14), and the introduction surface (16) formed by the expansion thereof, is quickly guided into the opening portion (18), and is inserted into the space between the waist portions (13) of the two-chain sheet body (1) Therefore, due to the recessed and thinned waist portion (13), the introduction pitch (E) between the two oppositely assembled chain body (1) can be made wider, and therefore, when it is shifting, The tapered end portion (D2) of the fastener element (D1) is obliquely inserted into the lead-in spacing (E) of the two-chain main body (1) (as shown in the sixth figure), and the two waist portions are used ( 13) With a wider lead-in spacing (E), it can be faster The sprocket (D1) guiding the toothed disc (D) is engaged with the engaging; and after the shifting is completed, the opposing protruding block (17) between the two slatted body (1) has a smaller The guiding distance (E1) allows the chain to be quickly guided and the tip end (D2) of the sprocket (D1) of the sprocket (D) to be held in place. The seventh figure shows that it will not cause offset sway during chain drive, and further achieve fast shifting, reduce vibration, reduce noise and avoid detachment.

Moreover, since the connecting surface (14) between the waist portion (13) of the chain main body (1) and the two joint portions (11) is formed in a double arc shape, no stress is excessively concentrated. Disadvantages, the chain can disperse the stress during operation, and does not have a straight connecting surface like the conventional chain piece, and is easy to break from the bending portion thereof, so there is no risk of easy breakage in this case; and the double circle The curved connecting surface (14) can make the chain body (1) of the toothed disc (D) conform to the direct connection of the double circular arc connecting surface (14), and the chain body can be made (1) It completely covers the fastener element (D1) to increase the stability and smoothness during running, and avoid vibration and shaking during operation.

According to another embodiment of the present invention, as shown in the eighth figure, a first chain body (1A) is configured as an inner chain, and the two ends of the first chain body (1A) are provided with opposite circles. An arc-shaped first joint portion (11A) having a first shaft hole (12A) penetrating therethrough and a first inner joint portion (11A) a first waist portion (13A) that is recessed and thinned toward the outward side, and a side surface of the first chain body (1A) is flat, and the first waist portion (13A) and the first first joint portion are The connecting portion of (11A) is respectively provided with a first connecting surface (14A) having a circular arc shape, and the first connecting surface (14A) is respectively directed by the first joint portion (11A) toward the first waist portion (13A) Gradually inclined, using the inner and outer edges of the first connecting surface (14A), respectively, the first lumbar line is formed at the junction with the first waist portion (13A) and the two first joint portions (11A) (15A), and the two first circular arc lines (15A) form an equidistantly arranged double arc shape, and the two first connecting surfaces (14A) are along the first chain body The two edges of (1A) form a larger outward expansion a first guiding surface (16A), and a first protruding block (17A) is disposed between the two first connecting surfaces (14A), the first protruding block (17A) is higher than the first waist ( 13A), further comprising a first opening portion (18A) having a relatively inclined shape on the two edges of the first waist portion (13A), the first opening portion (18A) being located on the opposite first introduction surfaces ( 16A) between.

A second chain body (1B) is configured as an outer chain piece, as shown in the ninth figure, the second waist body (13B) of the second chain body (1B) is composed of the second chain body One of the inner sides of the (1B) is relatively recessed and thinned toward the outer side surface, but the outer side surface of the second chain main body (1B) is formed to be flat.

In combination, as shown in the tenth embodiment, the first link body (1A) is combined with the second chain body (1B), which is the first chain body (1A) and The second chain body (1B) is disposed at a distance of two in pairs, and the first chain body (1A) and the second chain body (1B) are mutually coupled by a chain axis (C). The pivoting is assembled to form a chain, thereby being used for meshing transmission and shifting with the sprocket of a toothed disc.

According to still another embodiment of the present invention, as shown in FIG. 11, a first chain body (2A) is configured as an inner chain, and the two ends of the first chain body (2A) are provided with opposite sides. a circular arc-shaped first joint portion (21A), and an inner side surface between the two first joint portions (21A) is provided with a first waist portion (23A) which is oppositely recessed and thinned toward the outer side surface, the first waist portion (23A) 23A) a first connecting surface (24A) having a circular arc shape is respectively disposed at a junction of the two first joint portions (21A), and a first convex portion is connected between the two first connecting surfaces (24A) The block (27A) is raised from the first waist portion (23A) and is equal to the two first joint portions (21A).

A second chain body (2B) is configured as an outer chain piece. As shown in the twelfth figure, the second end of the second chain body (2B) is provided with a second combination of opposite arc shapes. a second waist portion (23B), wherein the second waist portion (23B) and the second second portion (23B) are opposite to the inner side surface of the second joint portion (21B). The connecting portion of the joint portion (21B) is respectively provided with a second connecting surface (24B) having a circular arc shape, and a second protruding block (27B) is connected between the second connecting surfaces (24B). The second protruding block (27B) is higher than the second waist portion (23B) and is in the same height as the second second joint portion (21B).

However, the above description is only one of the embodiments of the present invention. When the scope of the patent application of the present invention is not limited thereto, the simple equivalent changes and substitutions made by the scope of the patent application and the contents of the specification of the present invention are It is still within the scope of the protection covered by the scope of the invention.

(1) ‧‧‧Legoscope body

(11) ‧ ‧ joints

(12)‧‧‧Axis hole

(13) ‧‧‧ Waist

(14)‧‧‧ Connection surface

(15)‧‧‧Arc lines

(16) ‧‧‧Import

(17) ‧‧‧ protruding blocks

(18) ‧‧‧ openings

Claims (10)

A chain structure includes: a chain body, the two ends of the chain body are respectively provided with a pair of joint portions, the joint portion is provided with a shaft hole, and a waist portion is disposed on the two joints Between the portions, the waist portion is recessed and thinned from an inner side of the one side of the chain body, and a connecting portion of the waist portion and the two joint portions are respectively provided with a circular arc-shaped connecting surface. Between the two connecting faces, at least one protruding block is connected, the protruding block is higher than the waist, and the protruding block is lower than the joint or is combined with the joint The contour of the contour. The chain structure according to claim 1, wherein the inner and outer edges of the connecting surface respectively form a circular arc line with the joint of the waist portion and the two joint portions. The chain structure as claimed in claim 2, wherein the two circular arc lines form an arrangement of two circular arcs arranged equidistantly. The chain structure according to claim 1, wherein the two connecting surfaces are respectively formed with an outwardly expanding introduction surface along two edges of the chain body. The chain structure of claim 4, wherein the two edges of the waist are respectively provided with two oppositely inclined openings, and the openings are located between the two opposite introduction faces. The chain structure of claim 1, wherein the waist portion is relatively raised from the inner side of the chain body facing the outer side surface. The chain structure according to claim 1, wherein the outer side surface is formed in a flat shape. The chain structure according to claim 1, wherein the chain system is an outer chain or an inner chain. The chain structure of claim 1, wherein the connecting surface is a slope or a plane. The chain structure according to claim 9, wherein the slopes are gradually inclined by the joint portion toward the waist portion.