TWM451450U - Chain axle for roller chain - Google Patents

Description

Chain chain

The present invention relates to a chain, and more particularly to a chain shaft having a chain of a plurality of oil reservoirs recessed on the outer peripheral surface.

Generally, the chain is usually designed by a plurality of serially connected units in a loop shape, and each of the series connecting units substantially comprises: two spaced inner links and two outer ones respectively located outside the inner links An outer chain piece, a chain shaft inserted in the inner chain piece and having two ends respectively connected to the outer chain pieces, and a bushing for coupling the inner chain pieces and sleeved on the outer periphery of the chain shaft And a chain roller that is sleeved on the periphery of the bushing.

The bushing and the inner chain pieces form a combined body, and the chain shaft and the outer chain pieces are coupled to form a linkage body, and the linkage body can be pivoted relative to the combination body, thereby allowing the chain to have a The characteristics of the bend. Since the chain and the chain shaft of the coaxial bushing are relatively pivoted to generate severe friction during the bending process, the chain is generally added with lubricating oil at the joint portion during use to prevent excessive wear between the components. It works more smoothly.

However, since the peripheral surface of the chain shaft is a smooth and flat surface in the past, when lubricating oil is added to the joint portion of the chain, it is easy to lose and overflow, and the lubricating effect is not easy to last, which often causes rapid wear of the chain member and shortened service life. . Therefore, the chain industry has developed a variety of chain shafts with oil reservoirs on the outer circumference of the chain shaft, which can be used to store lubricating oil and maintain lubrication. The present invention is a chain shaft for constructing an innovative chain. Consumers have more choices.

Accordingly, it is an object of the present invention to provide a chain shaft that is innovative in construction and that can effectively store oil-lubricated chains.

Thus, the chain shaft of the novel chain can be driven to rotate about a central axis and includes: two end faces at opposite ends of the central axis, an outer peripheral surface around the central axis, and a plurality of An oil reservoir respectively surrounding the central axis and spaced apart from each other by the outer circumferential surface toward the central axis, the oil reservoirs respectively having a curved portion at the center of the outer peripheral surface, and two opposite and respectively adjacent to the end faces In the tail end portion, each of the oil storage grooves is gradually bent from the one end portion toward the curved portion in an S-shape, and then the curved portion gradually extends toward the other end portion in an inverted S-shape.

The foregoing and other technical aspects, features and advantages of the present invention will be apparent from the following description of the preferred embodiments.

Referring to Figures 1, 2 and 3, a preferred embodiment of the novel chain 2 is mounted on a chain 1 spaced apart from each other. The chain 1 comprises a plurality of head and tails connected in series to form a loop. The splicing unit 11 includes, in addition to the chain shaft 2, two pieces of the inner chain piece 111 which are oppositely disposed on the outer periphery of the chain shaft 2, and two pieces are respectively located on the inner chain pieces. An outer chain piece 112 which is externally connected to both ends of the chain shaft 2, a bushing 113 which is sleeved on the outer periphery of the chain shaft 2 and has both ends joined to the inner chain pieces 111, and one inner chain piece Between 111 and sleeved on the bushing 113 The outer chain roll 114. The bushing 113 has an inner annulus 115 adjacent the chain shaft 2. However, since the configuration of the tandem unit 11 is not the focus of the present invention, it is not limited to the above configuration.

The chain shaft 2 is drivable and rotatable about a central axis 21 and includes two end faces 22 spaced apart at opposite ends of the central axis 21, a periphery around the central axis 21 and connecting the circumferences of the end faces 22 A face 23, and a plurality of oil sump 24 respectively surrounding the central axis 21 and spaced apart from each other by the outer peripheral surface 23 toward the central axis 21. The chain shaft 2 is a cylindrical shaft having a diameter D of 3.5 to 5.5 mm, preferably a diameter D of 4.45 mm, and three to six oil reservoirs 24 can be uniformly disposed. In the present embodiment, the chain shaft 2 is There are four oil reservoirs 24 that are evenly arranged. The outer peripheral surface 23 has a sleeve portion 231 surrounding the center and surrounded by the inner annular surface 115 of the bushing 113, and two of the sleeve portions 231 are respectively located above and below the sleeve portion 231 and are coupled to the outer chain pieces. In order to clearly distinguish the range of the boss portion 231 from the side end portions 232 of the side end portion 232 of the 112, the boundary line is indicated by an imaginary line 233 in the drawing. The oil reservoirs 24 are recessed in the sleeve portion 231 of the outer peripheral surface 23 and slightly extend beyond the sleeve portion 231.

Each of the oil reservoirs 24 has a curved portion 241 located at the center of the outer peripheral surface 23, and two opposite end portions 242 adjacent to the end faces 22, respectively. Moreover, each of the oil sump 24 is gradually bent in an S shape from one of the end portions 242 toward the curved portion 241, and then gradually extended by the curved portion 241 toward the other end portion 242. . Each of the oil reservoirs 24 of the present embodiment has a curved shape of a Curve of Agnesi.

The shape design of the oil storage tanks 24 is further described below. Referring to the following figure (1), given a circle, it is assumed that a point O on the circle is the origin, and another point M of the circle is a symmetry point of O. Then slash OA to any other point A on the circle, let the tangents of OA and M intersect at N, and draw a first line that passes N and is parallel to OM, and then draws a line A and is parallel to the tangent of M. a second straight line, the first straight line intersects the second straight line at P, then the trajectory of P is the guilloche line, that is, the curved shape of each oil sump 24, and the curve equation is , take the radius of the circle The chain shaft 2 has a diameter D.

Referring to Fig. 4, each of the oil reservoirs 24 has a width b of 0.1 to 0.4 mm and a depth h of 0.2 to 0.5 mm, preferably a width b of 0.25 mm and a depth h of 0.35 mm. Of course, the number, width b and depth h of the oil reservoirs 24 of the chain shaft 2 are not limited to the above embodiments.

Referring to FIGS. 1 and 3, when the chain 2 of the present invention is mounted on the chain 1, the outer peripheral surface 23 of the chain shaft 2 faces the inner annular surface 115 of the bushing 113 when the user is in the series unit of the chain 1. When the lubricating oil is filled, the lubricating oil may be stored between the outer peripheral surface 23 and the inner annular surface 115, and may be stored in the oil storage tanks 24 of the chain shaft 2, thereby improving the oil storage effect and reducing the oil. The degree of wear between the chain shaft 2 and the relatively rotating bushing 113 can extend the service life of the chain 1. Under the comprehensive considerations of factors such as convenient manufacture, uniform distribution of the oil storage tank 24, increase of the total volume of the oil storage tank 24, and the strength of the chain shaft 2, the oil storage tanks 24 of the present invention adopt a curved design of the tongue line.

It can be seen from the above description that the oil sump 24 is disposed on the outer peripheral surface 23 of the chain shaft 2, and the oil storage space of the chain 1 can be surely increased, so that the lubrication effect of the chain 1 is more durable and the wear resistance can be improved. The chain 1 is smoother in operation and at the same time prolongs the service life of the chain 1, so the present invention is a novel structural chain 2.

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent change and modification made by the novel patent application scope and the novel description content, All remain within the scope of this new patent.

1‧‧‧Chain

11‧‧‧Sequence unit

111‧‧‧Internal link

112‧‧‧Outer link

113‧‧‧ bushing

114‧‧‧Chain Rolling

115‧‧‧ Inner torus

2‧‧‧Chain

21‧‧‧ center axis

22‧‧‧ end face

23‧‧‧ outer perimeter

231‧‧‧ Bushing

232‧‧‧ side end

233‧‧‧ imaginary line

24‧‧‧ oil storage tank

D‧‧‧ diameter of the chain shaft

B‧‧‧ Width of the oil storage tank

H‧‧‧ Depth of oil storage tank

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing a preferred embodiment of a chain shaft of the present invention, illustrating a state in which the novel chain shaft is mounted on a chain; Fig. 2 is a perspective view of the preferred embodiment; An outer peripheral surface development view of one embodiment; and Fig. 4 is a schematic cross-sectional view of the preferred embodiment.

1‧‧‧Chain

11‧‧‧Sequence unit

111‧‧‧Internal link

112‧‧‧Outer link

113‧‧‧ bushing

114‧‧‧Chain Rolling

115‧‧‧ Inner torus

2‧‧‧Chain

22‧‧‧ end face

23‧‧‧ outer perimeter

231‧‧‧ Bushing

232‧‧‧ side end

233‧‧‧ imaginary line

24‧‧‧ oil storage tank

Claims (7)

A chain shaft of a chain that can be driven to rotate about a central axis and includes: two end faces at opposite ends of the central axis, an outer peripheral surface around the central axis, and a plurality of respectively surrounding a central axis and spaced apart from each other by an oil reservoir recessed toward the central axis by the outer peripheral surface, the oil reservoirs each having a curved portion at the center of the outer peripheral surface, and two opposite end portions respectively adjacent to the end faces Each of the oil reservoirs is gradually bent in an S shape from one of the end portions toward the curved portion, and then gradually extended from the curved portion toward the other end portion in an inverted S shape. According to the chain of the chain of claim 1, wherein each of the oil reservoirs has a curved shape of a tongue line. According to the chain shaft of the chain described in claim 2, wherein the diameter of the chain shaft is D, and the curve equation of each oil storage tank is ,take The chain of the chain according to claim 3, wherein the chain shaft has a diameter of 3.5 to 5.5 mm and comprises three to six uniformly disposed oil reservoirs. According to the chain of the chain of claim 4, each of the oil reservoirs has a width of 0.1 to 0.4 mm and a depth of 0.2 to 0.5 mm. According to the chain of the chain of claim 5, wherein the chain shaft has a diameter of 4.45 mm and comprises four uniformly arranged oil storage grooves, each of which has a width of 0.25 mm and a depth of 0.35 mm. The chain shaft of the chain of claim 1, wherein the outer peripheral surface has a sleeve portion surrounding the center, and two side ends respectively located above and below the sleeve portion, The oil storage tank is recessed on the outer peripheral surface The sleeve part.