TWM589161U - Sprocket noise reduction structure - Google Patents

Abstract

This creation is about a noise reduction structure of a sprocket. It is mainly to make the top of a sprocket tooth have two longitudinal long sides and two lateral short sides, and make the two lateral short sides adjacent to their two sides. The longitudinal long sides are connected by a beveled edge, so that the tooth top forms a drum-shaped tooth profile, and the drum-shaped tooth profile extends to the tooth root, whereby the design of the drum-shaped sprocket can reduce the original creation. The sprocket teeth and chain chains and chain rolls are in the friction and friction area of the transmission process, so as to effectively improve the smoothness of the sprocket and chain transmission, and reduce the noise caused by the collision and friction during the transmission of the sprocket and chain.

Description

Sprocket noise reduction structure

This creation is about a sprocket noise reduction structure, especially a sprocket structure that can effectively reduce the collision friction between the sprocket and the chain during transmission to reduce the noise generated during transmission and improve the smoothness of the transmission.

According to the development of automobiles and locomotives, the convenience of people’s lives has been expanded. Traditional automobiles and locomotives mainly use gasoline engines as the power source. The exhaust gas emitted by gasoline engines contains carbon dioxide and hydrocarbons, which cause serious air pollution. .

Based on the emphasis on environmental protection, electric vehicle systems that use motors as a source of power are gradually favored by consumers. The existing two-wheel or three-wheel electric vehicle systems are mainly provided with front and rear wheels at the front and rear of the frame, and are attached to the frame. The top is equipped with a motor, and a sprocket is provided on the rear wheel set, and the motor is connected by a chain between the transmission part and the sprocket. By using the transmission structure of the sprocket and the chain, the motor can be Power is transmitted to the rear wheels to drive the electric vehicle to travel. However, as shown in the seventh figure, the sprocket (41) of the existing electric vehicle sprocket has a tooth profile (41) with a rectangular tooth profile, and extends the rectangular tooth profile to the tooth root, when the existing chain When the wheel and the chain (5) are driven, the longitudinal long side (42) and the lateral short side (43) of the rectangular tooth top (41) of the sprocket (4) of the sprocket (4) are connected with the chain (5) and its chain (51) It is in close contact with the perforated hole (53) formed by the chain roller (52), so that it frequently collides with the chain piece (51) and the chain roller (52) of the chain (5). If the wheels and chain (5) do not move smoothly, they will emit disturbing collision noise, which will affect the riding quality of electric vehicles.

The reason is that, in view of the existing two-wheel or three-wheel electric vehicles, the sprocket and chain structure will emit disturbing noises and lack of smooth operation during the transmission process, which is based on their years of manufacturing and design experience in related fields. With the help of knowledge, and after many ingenuity, research and creation of this creation.

This creation is about a sprocket noise reduction structure. Its main purpose is to provide a sprocket structure that can effectively reduce the collision friction between the sprocket and the chain during transmission to reduce the noise generated during transmission and improve the smoothness of the transmission. .

In order to achieve the above-mentioned implementation purposes, the author has developed the following sprocket noise reduction structure, which is mainly provided with a sprocket body, and a number of sprockets are formed at the periphery of the sprocket body, so that the sprocket is formed with relative teeth Roots and tooth crests, and connect the tooth roots of the sprocket teeth and the sprocket body as a whole, and make the tooth crests of the sprocket teeth form two longitudinal long sides and two transverse short sides between the two longitudinal long sides , And connect the two transverse short sides with the longitudinal long sides adjacent to the two sides by a bevel, so that the tooth top of the sprocket forms a drum-shaped tooth profile, and the drum tooth of the tooth top The profile extends to the root of the tooth.

The noise reduction structure of the sprocket as described above, wherein the tooth tip of the sprocket defines a first datum line along the longitudinal long side, and a tangent line along the hypotenuse, and makes the first The angle between the reference line and the adjacent tangent line is 5-40 degrees.

The noise reduction structure of the sprocket as described above, wherein the tooth tip of the sprocket defines a first reference line along the longitudinal long side and a second reference line along the lateral short side, and The first reference line along the two longitudinal long sides and the second reference line along the two lateral short sides together form a rectangle, and the first reference line forms the long side of the rectangle, and the other The second reference line forms the short side of the rectangle, and the length of the longitudinal long side is reduced to 20%~60% of the length of the rectangular long side formed by the first reference line, and the length of the transverse short side is reduced to the first The short side of the rectangle formed by the two reference lines is 20%~80% of its length.

The noise reduction structure of the sprocket as described above, wherein the tooth tip of the sprocket defines a first reference line along the longitudinal long side and a second reference line along the lateral short side, and A first reference line along the two longitudinal long sides and a second reference line along the two lateral short sides together form a rectangle, and the two first reference lines and the second second reference lines are enclosed The four corners of the resulting rectangle and the drum-shaped tooth profile are each formed with a notch of a right-angled triangle, and the notch of the right-angled triangle is formed with a beveled edge to match the shape of the beveled edge of the drum-shaped tooth profile and The location corresponds.

In addition, the author of the project has developed another sprocket noise reduction structure, which is mainly equipped with a sprocket body, and several sprockets are formed at the periphery of the sprocket body, so that the sprocket is formed with relative tooth roots and teeth Crest, and connect the root of the sprocket to the sprocket body as a whole, and make the crest of the sprocket form two longitudinal long sides and two transverse short sides between the two longitudinal long sides, and make The two lateral short sides are respectively connected to the adjacent longitudinal long sides by an arc edge, so that the tooth top of the sprocket forms a drum-shaped tooth profile, and the drum tooth profile of the tooth top extends to Tooth root.

The noise reduction structure of the sprocket as described above, wherein the tooth tip of the sprocket defines a reference line passing through the longitudinal long side, and a tangent line passing through the arc edge connected to the longitudinal long side, so that the longitudinal direction The angle between the reference line of the long side and the tangent of the arc side is 5 to 40 degrees.

The noise reduction structure of the sprocket as described above, wherein the tooth tip of the sprocket defines a first reference line along the longitudinal long side and a second reference line along the lateral short side, and The first reference line along the two longitudinal long sides and the second reference line along the two lateral short sides together form a rectangle, and the first reference line forms the long side of the rectangle, and the other The second reference line forms the short side of the rectangle, and the length of the longitudinal long side is reduced to 20%~60% of the length of the rectangular long side formed by the first reference line, and the length of the transverse short side is reduced to the first The short side of the rectangle formed by the two reference lines is 20%~80% of its length.

The noise reduction structure of the sprocket as described above, wherein the tooth tip of the sprocket defines a first reference line along the longitudinal long side and a second reference line along the lateral short side, and A first reference line along the two longitudinal long sides and a second reference line along the two lateral short sides together form a rectangle, and the two first reference lines and the second second reference lines are enclosed Between the four corners of the rectangle and the drum-shaped tooth profile, a notch with a generally right triangle is formed, and the notch with a right triangle is formed with a beveled edge, and the beveled edge is in a concave arc shape. It corresponds to the shape and position of the arc edge of the drum tooth profile.

In this way, by using the drum sprocket design of the created sprocket, the collision friction area of the sprocket of the created sprocket, the chain piece of the chain and the chain roll during the transmission process can be reduced, so as to effectively improve the sprocket Smooth transmission with the chain, and reduce the noise caused by collision and friction during the transmission of the sprocket and the chain.

In order to make the technical means of this creation and the effects it can achieve more complete and clear disclosure, here are detailed descriptions, please refer to the disclosed schemes and figures:

First of all, please refer to the first and second pictures, the sprocket (1) for this creation is mainly provided with a sprocket body (11), and a number of sprockets (12) are formed at intervals around the periphery of the sprocket body (11) ), so that the sprocket (12) is formed with opposite tooth root (121) and tooth crest (122), and the tooth root (121) of the sprocket (12) and the sprocket body (11) are connected as The tooth top (122) of the sprocket (12) is formed as one body, forming two relatively long longitudinal sides (13) and two relatively short lateral sides (14) between the two longitudinal long sides (13), and making the two The lateral short side (14) is connected to the longitudinal long side (13) adjacent to each side by a bevel (15), so that the tooth tip (122) of the sprocket (12) forms a drum-shaped tooth profile , Another definition has a first datum line (16) along the longitudinal long side (13) and a second datum line (17) along the transverse short side (14), and makes the length along the two longitudinal sides The first reference line (16) along the side (13) and the second reference line (17) along the two lateral short sides (14) together form a rectangle, so that the first reference line (16) ) Forms the long side of the rectangle, and the second reference line (17) forms the short side of the rectangle, and reduces the length of the longitudinal long side (13) to the long side of the rectangle formed by the first reference line (16) 20%~60% of the length, and the length of the lateral short side (14) is reduced to 20%~80% of the length of the rectangular short side formed by the second reference line (17), or this creation department can define an edge The hypotenuse (15) is provided with a tangent (18), and an angle (θ) of about 5-40 degrees is formed between the first reference line (16) and the adjacent tangent (18), and the two The four corners of the rectangle surrounded by the first reference line (16) and the two second reference lines (17) form a right-angled triangle gap (19) with the drum tooth profile, and make the The notch (19) of the right-angled triangle corresponds to the shape and position of the bevel (15) of the drum profile, so that the drum profile of the tooth tip (122) extends to the root (121).

Accordingly, the length of the longitudinal long side (13) of the drum tooth tip (122) of the sprocket (12) of this creation is reduced to the longitudinal long side of the rectangular tooth tip (41) of the existing sprocket (4) (42) 20%~60% of the length, and the length of the transverse short side (14) of the drum tooth tip (122) of the sprocket (12) of this creation is reduced to the rectangular tooth crest of the existing sprocket (4) (41) The design of the lateral short side (43) of 20% to 80% of the length, please also refer to the third figure, when the sprocket (1) of this creation is assembled on the rear wheel of the two-wheel or three-wheel electric vehicle And connected with the transmission part of the motor of the electric vehicle with a chain (2), so that the sprocket (1) sprocket (12) and the chain (2) its chain plate (21) and chain roller (22) ) The surrounding perforations (23) mesh with each other. At this time, the drum-shaped sprocket (12) and its bevel (15) will be formed with the perforation (23) of the chain (2) Appropriate clearance to reduce the collision friction area of the sprocket (1), sprocket (12), chain (2), chain (21) and chain roller (22) in the transmission process, and effectively improve the sprocket (1) Smooth transmission with the chain (2), and the effect of reducing the disturbing noise caused by collision and friction during the transmission of the sprocket (1) and the chain (2), so as to improve the riding quality of the two-wheel or three-wheel electric vehicle By.

In addition, please refer to the fourth and fifth figures, the sprocket (3) according to another embodiment of the present invention is mainly formed with a number of sprockets spaced around the periphery of the sprocket body (31) of the sprocket (3) (32), and the tooth root (321) of the sprocket (32) is connected with the sprocket body (31) as a whole, and the tooth crest (322) of the sprocket (32) is formed into two relatively long longitudinal sides (33) and the opposite two lateral short sides (34) between the two longitudinal long sides (33), and the two lateral short sides (34) are respectively separated from the longitudinal long sides (33) adjacent to the two sides by one The arc edges (35) are connected, so that the tooth tops (322) of the sprocket teeth (32) form another drum-shaped tooth profile, and a first reference line (36) along the longitudinal long side (33) is defined. ) And a second reference line (37) along the lateral short side (34), and the first reference line (36) along the two longitudinal long sides (33) and the two lateral short sides (34) The second reference line (37) is enclosed to form a rectangle, and the first reference line (36) forms the long side of the rectangle, and the second reference line (37) forms the rectangle The short side reduces the length of the longitudinal long side (33) to 20%~60% of the length of the rectangular long side formed by the first reference line (36), and reduces the length of the lateral short side (34) to The short side of the rectangle formed by the second reference line (37) is 20%~80% of its length, or the author can define a tangent line (38) passing through the arc edge (35), and make the first reference line (36) ) An angle (θ) of about 5-40 degrees is formed between the tangent line (38) adjacent to it, and the rectangle formed by the two first reference lines (36) and the second reference lines (37) The corners of the four ends of the drum-shaped tooth profile each form a notch (39) with a substantially right-angled triangle, and the notch (39) of the substantially right-angled triangle forms a concave arc at the oblique side to meet the drum The shape and position of the arc edge (35) of the profiled tooth profile correspond to each other, so that the drum profile of the tooth tip (322) extends to the root (321).

In this way, the length of the longitudinal long side (33) of the drum-shaped tooth tip (322) of the sprocket (32) of the other embodiment of the invention can also be reduced to the rectangular shape of the existing sprocket (4) 20%~60% of the length of the longitudinal long side (42) of the addendum (41), and the transverse short side (34) of the drum-shaped addendum (322) of the sprocket (32) of this embodiment The length is reduced to 20%~80% of the length of the transverse short side (43) of the rectangular tooth top (41) of the existing sprocket (4). Please also refer to the sixth figure. Here, when the sprocket (3) and the chain (2) of the other embodiment of the invention are assembled, the arc edge (35) of the sprocket (32) The system will form an appropriate gap with the perforation (23) of the chain (2) to reduce the collision friction area with the chain (2), its chain plate (21) and chain roller (22), while also reducing the sprocket ( 1) The transmission noise with the chain (2) and the benefits of improving the smoothness of the transmission between the sprocket (1) and the chain (2).

The foregoing embodiments or drawings do not limit the implementation of the sprocket noise reduction structure of this creation, and any appropriate changes or modifications by those with ordinary knowledge in the technical field should be deemed not to deviate from the patent scope of this creation.

It can be seen from the above structure and implementation that the creative department has the following advantages:

1. The noise reduction structure of the sprocket in this creation is to make the sprocket teeth form a drum structure, thereby reducing the collision friction area of the sprocket and the chain, and effectively reducing the collision friction caused by the sprocket and the chain transmission. Noisemaker.

2. The noise reduction structure of the sprocket of this creation is to make the sprocket of the sprocket to be a drum-shaped structure, according to this, to reduce the collision friction area of the sprocket of the creation and the chain, and to effectively improve the smoothness of the sprocket and chain transmission And other benefits.

In summary, the embodiments of this creation can indeed achieve the expected effect, and the specific structure disclosed by it has not only not been seen in similar products, nor has it been disclosed before the application, and has fully complied with the provisions of the Patent Law and To request that you file an application for a new type of patent in accordance with the law, pleading for the review and granting the patent, you feel truly virtuous.

＜This creation＞

(1) ‧‧‧ sprocket

(11) ‧‧‧ sprocket body

(12) ‧‧‧ sprocket

(121) ‧‧‧ tooth root

(122) ‧‧‧ addendum

(13) ‧‧‧ Long longitudinal side

(14) ‧‧‧ Short side

(15) ‧‧‧ Hypotenuse

(16) ‧‧‧ First baseline

(17) ‧‧‧ Second baseline

(18) ‧‧‧ Tangent

(19) ‧‧‧ Notch

(2) ‧‧‧Chain

(21) ‧‧‧Chain

(22) ‧‧‧Chain Roll

(23) ‧‧‧ Perforated

(3) ‧‧‧ sprocket

(31) ‧‧‧ sprocket body

(32) ‧‧‧ sprocket

(321) ‧‧‧ tooth root

(322) ‧‧‧ addendum

(33) ‧‧‧ Long longitudinal side

(34) ‧‧‧ Short side

(35) ‧‧‧

(36) The first reference line

(37) Second base line

(38) ‧‧‧ Tangent

(39) ‧‧‧ Notch

<existing>

(4) ‧‧‧ sprocket

(41) ‧‧‧ addendum

(42) ‧‧‧ Longitudinal

(43) ‧‧‧ Short side

(5) ‧‧‧Chain

(51) ‧‧‧Chain

(52) ‧‧‧Chain Roll

(53) ‧‧‧ Perforated

The first picture: a partially enlarged perspective view of the sprocket of this creation

The second picture: front view of the crest of the chain teeth of this creation

The third picture: the cross-sectional view of the use state of this creation

The fourth picture: another partially enlarged perspective view of the sprocket of another embodiment of the creation

Fifth picture: another front view of the tooth top of the sprocket according to another embodiment of this creation

Figure 6: Cross-sectional view of the working state of another embodiment of the creation

Figure 7: Cross-sectional view of the existing use state

(1)‧‧‧Sprocket

(11)‧‧‧Sprocket body

(12)‧‧‧Chain

(121)‧‧‧Root

(122)‧‧‧Tooth top

Claims (8)

A sprocket noise reduction structure is mainly provided with a sprocket body, and several sprocket teeth are formed at intervals around the sprocket body circumference, so that the sprocket teeth are formed with relative tooth roots and tooth crests, and the sprocket teeth are formed The root is connected with the sprocket body as a whole, and the tooth crest of the sprocket forms two longitudinal long sides and two transverse short sides between the two longitudinal long sides, and the two transverse short sides are respectively connected to the two sides The adjacent longitudinal long sides are connected by a beveled edge, so that the tooth top of the sprocket forms a drum-shaped tooth profile, and the drum-shaped tooth profile of the tooth top extends to the root of the tooth. The noise reduction structure of the sprocket according to item 1 of the patent application scope, wherein the tooth tip of the sprocket defines a first datum line along the longitudinal long side and a tangent line along the hypotenuse, Moreover, an angle of 5-40 degrees is formed between the first reference line and the adjacent tangent line. The noise reduction structure of the sprocket as described in item 1 of the patent application scope, wherein the tooth tip of the sprocket defines a first datum line along the longitudinal long side and a second datum along the lateral short side A reference line, and the first reference line provided along the two longitudinal long sides and the second reference line provided along the two lateral short sides together form a rectangle, and the first reference line forms the rectangle The long side, and the second reference line forms the short side of the rectangle, and the length of the longitudinal long side is reduced to 20%~60% of the length of the rectangular long side formed by the first reference line, and the horizontal short side The length is reduced to 20% to 80% of the length of the short side of the rectangle formed by the second reference line. The noise reduction structure of the sprocket as described in item 1 of the patent application scope, wherein the tooth tip of the sprocket defines a first datum line along the longitudinal long side and a second datum along the lateral short side A reference line, and the first reference line provided along the two longitudinal long sides and the second reference line provided along the two lateral short sides together form a rectangle, and the two first reference lines and the second The four corners of the rectangle surrounded by the two reference lines form a right-angled triangle gap with the drum-shaped tooth profile, and the right-angled triangle gap is formed with a bevel to meet the drum-shaped tooth profile The hypotenuse corresponds to its shape and position. A sprocket noise reduction structure is mainly provided with a sprocket body, and several sprocket teeth are formed at intervals around the sprocket body circumference, so that the sprocket teeth are formed with relative tooth roots and tooth crests, and the sprocket teeth are formed The root is connected with the sprocket body as a whole, and the tooth crest of the sprocket forms two longitudinal long sides and two transverse short sides between the two longitudinal long sides, and the two transverse short sides are respectively connected to the two sides The adjacent longitudinal long sides are connected by an arc edge, so that the tooth top of the sprocket forms a drum-shaped tooth profile, and the drum-shaped tooth profile of the tooth top extends to the root of the tooth. The noise reduction structure of the sprocket as described in item 5 of the patent application scope, wherein the tooth tip of the sprocket defines a first datum line along the longitudinal long side, and a tangent line passing through the arc edge, so that An angle between the first reference line and the tangent line adjacent to it is about 5-40 degrees. The noise reduction structure of the sprocket as described in item 5 of the patent application scope, wherein the tooth tip of the sprocket defines a first datum line along the longitudinal long side and a second datum along the lateral short side A reference line, and the first reference line provided along the two longitudinal long sides and the second reference line provided along the two lateral short sides together form a rectangle, and the first reference line forms the rectangle The long side, and the second reference line forms the short side of the rectangle, and the length of the longitudinal long side is reduced to 20%~60% of the length of the rectangular long side formed by the first reference line, and the horizontal short side The length is reduced to 20% to 80% of the length of the short side of the rectangle formed by the second reference line. The noise reduction structure of the sprocket as described in item 5 of the patent application scope, wherein the tooth tip of the sprocket defines a first datum line along the longitudinal long side and a second datum along the lateral short side A reference line, and the first reference line provided along the two longitudinal long sides and the second reference line provided along the two lateral short sides together form a rectangle, and the two first reference lines and the second The rectangle formed by the two reference lines forms a gap with a substantially right triangle between the four end corners and the drum tooth profile, and the gap with the substantially right triangle forms a hypotenuse, and the hypotenuse It has a concave arc shape, corresponding to the shape and position of the arc edge of the drum tooth profile.

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