TWI415753B - Drive body for bicycle wheel hub - Google Patents

Abstract

A splined drive body for supporting a plurality of sprockets is disclosed. The drive body is provided with at least one composite drive body spline which consists of a first portion made up of the drive body material and a second portion made up of a different, harder material. The second portion of the composite drive body spline is an insert which includes a force receiving surface and a force transmitting surface and is operable to transmit force transmitted to it into the drive body through a force receiving surface provided on the first portion of the composite drive body spline.

Description

Transmission body for bicycle hub

This invention relates to a shifting gear system that can be found on many bicycles, and more particularly to a gear system having a hard insert in the compound slot key on the transmission.

On bicycles, the rear bicycle hub cooperates with splined drive bodies to support multiple drive sprockets. Looking back at the 1970s, it was quite common to have a 5-speed gear on the transmission. These drive gears and the two sprockets or chain rings mounted on the crank provide 10 different gear ratios or gear ratios available to the riders. However, in recent years, in order to increase the bicycle's more shifting options, the number of driving gears on the transmission body in the rear bicycle hub has also increased, and the gear thickness has increased in order to accommodate the increased gear in the limited space. cut back. High-performance bicycle designers strive to reduce the weight of bicycles because, in general, the performance of bicycles is inversely related to the weight. When the weight is reduced, the performance ratio is usually improved. The drive of the slotted key carrying the gear is usually made of a relatively hard material, such as steel. However, many high performance bicycle hubs including slotted transmissions are made of a relatively soft material, such as an aluminum alloy.

A real hub RH of one of the variable speed bicycles is shown in Fig. 1, and generally includes a plurality of sprockets S which are disposed on the externally coupled drive shaft DB. Gear S (shown in Figures 1 and 1A) is internally The complementary manner forms a spline structure, so the torque transmitted by the chain (not shown) to the gear S is transmitted to and through the transmission DB, as is generally known, to the hub projection. Hub flange HF, and the rear wheel connected to the rear hub RH. Conventional shifting systems (not shown) are used to move the chain to or from the different gears S, thereby providing the knight to select and use different gear ratios. The transmission body DB has a cylindrical shape, and a plurality of groove keys DBS are provided thereon, and the groove key DBS extends on the outer surface of the transmission body DB in a short distance in the radial direction. Between the slot keys DBS, there is a corresponding groove G. The groove key DBS and the groove G extend in the axial direction at a distance close to the width of the transmission body DB. There is a mounting hole at the center of each gear S (Fig. 1A), and a sprocket hole splines SHS is arranged in the mounting hole, and the gear hole slot SHS and the transmission slot key DBS cooperate with each other ( Complement). Under this configuration, the torque transmitted to the gear S (from a chain or the like; not shown) is sequentially transmitted to the transmission body DB in the rear hub RH. Each of the transmission slot keys DBS has a force receiving surface FRF (Fig. 1) which cooperates with the force transmission surface FTF (Fig. 1A) of the gear slot cogging SHS, so that the torque transmitted to the gear S can be transmitted to the transmission DB.

The area of the force transmitting surface FTF of the gear S is small, and this causes a very high load to be transmitted to the small force receiving surface FRF of the transmission slot key DBS. The transmission DB made of steel can generally withstand these high loads. However, in high-performance wheels with steel gears and lightweight transmissions made of aluminum or other lighter but softer materials, the force transfer surface FTF of the gear S may and will damage the slot key DBS. Face FRF. This will cause wear and tear, and finally the gear and the transmission body will no longer fit when rotating. , resulting in accelerated wear. In recent years, the thickness of the gear S has been reduced to accommodate more gears on the transmission. As a result of this development, a larger load is transmitted from the force transmission surface FTF of the gear hole slot SHS to the force receiving surface FRF of the smaller portion of the transmission slot key DBS.

The present invention is based on the discovery that a transmission insert made of a relatively hard material (e.g., steel) is used on a transmission slot key of a transmission body DB made of a relatively soft material such as an aluminum alloy to avoid excessive wear. In accordance with the present invention, a transmission body is provided with a composite slot key comprising a first portion made of a material of the transmission body and a second portion made of a different, relatively hard material. The second portion of the composite slot key is an insert that includes a force bearing surface. The insert transmits the force transmitted thereto to the transmission through the first portion of the composite slot key. The composite slot key, and particularly the insert that is relatively stiff and forms part of the composite slot key, avoids damage to the softer transmission material when used in high performance bicycle hubs.

The present invention relates to a transmission body for a bicycle hub. The transmission body includes at least one composite groove key, and the composite groove key is attached to the outer surface of the transmission body of the hub. The first part of the transmission body and the composite slot key is made of a relatively soft material. The composite slot key includes a second portion, the second portion including at least one insertion portion, the insertion portion being made of a relatively hard material. Preferably, the insertion portion is secured to the transmission body by an overlap on the body of the transmission.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a steel or rigid insert that is effective against wear on relatively soft drive slot keys such as aluminum alloy. The wear may be a thin gear hole cogging made of a hard material such as steel. When the force transmission surface is applied with a very high load.

The technical features and advantages of the present disclosure have been broadly described above, and the detailed description of the present disclosure will be better understood. Other technical features and advantages of the subject matter of the claims of the present disclosure will be described below. It will be appreciated by those skilled in the art that the present invention may be practiced with the same or equivalents. It is also to be understood by those of ordinary skill in the art that this invention is not limited to the spirit and scope of the disclosure as defined by the appended claims.

Referring to Figures 2 to 6, a drive body 10 for a bicycle bicycle hub (not shown, see in principle Figure 1) is a cylinder having a plurality of splines. Shape. There are three types of slot keys provided in the transmission body 10. A centering spline 12 is referred to as a sprocket (not shown, see in principle in FIG. 1) when assembled on the transmission 10. A conventional spline 14 is integrated with the transmission body 10. Of course, the conventional slot key 14 is made of the same material used to make the transmission body 10. A composite spline 16 includes a first portion 18 integral with the transmission body 10, the first portion 18 being formed of the same material used to make the transmission body 10. The composite slot key 16 also includes a second portion 20 that includes an insert and the material from which the insert is made is different and stiffer than the material of the actuator 10. The common slot keys 14 each have a force receiving surface 22, and the force from the sprocket is applied to The force-receiving surface 22, particularly those when the torque is applied to the sprocket (S in Figure 1), is the force transfer surface from the sprocket hole splines (SHS, as shown in Figure 1). The force of the FTF shown in Figure 1.

On the composite slot key 16, there is a force receiving surface 24 formed on the insertion portion or second portion 20 of the composite slot key 16, wherein the first portion is made of a relatively soft material. 18, the insertion portion is made of a relatively hard material. The harder material used to make the insert or second portion 20 is relatively wear resistant relative to the softer material used to make the transmission body 10, the slot keys (12, 14), and the first portion 18 of the composite slot key 16. Since the slot key on the conventional transmission body is made of the same material as the transmission system, and the conventional transmission body does not have a composite slot key, the transmission body 10 and especially the slot key are compared with the conventional transmission body and its slot key. (12, 14 and 16) will wear more slowly. Further, on the insertion portion 20, opposite to the force receiving surface 24, there are force transmitting surfaces 25 (Figs. 2 and 6), and the force is transmitted from the insertion portion 20 to the first portion 18 via the force transmitting surface 25. This section will be detailed below.

The second portion of the composite slot key 16 is the insertion portion 20, and the insertion portion 20 includes a pair of tabs 26 that engage the first portion 18 of the composite slot key 16 to retain the insertion portion 20. The first portion 18 of the composite slot key 16 is formed by three projections and axially extending sections 28, wherein the segment portion 28 is integrally formed with the transmission body 10. Each segment portion 28 includes a force bearing surface 29 (Fig. 6) that receives the force transmitted from the force transmitting surface 25 of the insertion portion 20. The two circumferentially extending grooves (indicated by numeral 30 in Figure 2) are defined by three segment portions 28.

3 through 5 show how the insertion portion 20 is held to become part of the composite slot key 16. The insertion portion 20 can be formed by punching a single steel plate by placing a steel plate between a punch and a die, and the die is fabricated so that a member having a shape other than the insertion portion 20 can be produced. When the punch is driven toward the die, the steel sheet is sheared to form the insertion portion 20. When the stamping method is used to make the insertion portion 20 with the tabs 26, the upper surface 32 will contact the punch, and the lower surface 34 will contact the die, and the sides of the insertion portion 20, including the sides of the tabs 26 ( In particular, as shown in Figure 5, there will be a contoured surface. The insert portion 20 adjacent the lower surface 34 of the insertion portion 20 and a portion of the side of the tab 26 have substantially smooth, vertical cut regions, which are designated by the numeral 36. The insertion portion 20 adjacent to the upper surface 32 of the insertion portion 20 and a portion of the side surface of the tab 26 have an angled, tapered, somewhat rough or jagged breakaway region. It is indicated by the numeral 38 in FIG. This taper naturally generated on the insertion portion 20 is a result of the insertion of the insertion portion 20 by a press method. This feature is advantageous for the insertion portion 20 to be secured to the transmission body 10, if the recess 30 (Fig. 2) is formed in a width dimension that is substantially smaller than the tab 26 of the insertion portion 20, indicated by the numeral 36, substantially smooth, vertical The width of the vicinity of the cut zone and if the width of the groove 30 is approximately equal to the width of the portion of the jagged fracture zone and the upper surface 32 of the tab 26. The tab 26 can then be placed beside the recess 30 such that the tab 26 will align with the recess 30. Then, the force is applied to the force receiving surface 24 of the insertion portion 20, and the tab 26 is pressed into the groove 30. At this time, the insertion portion 20 will move forward and clockwise (as shown in FIG. 2) until the insertion portion. 20 reaches the position shown at the top of Figure 2. In this position, the force transmitting surface 25 of the insertion portion 20 contacts the composite slot key The force surface 29 of the segment 28 of the first portion 18 of 16. Because the width of the portion of the tab 26 is wider than the width of the recess 30, and because the tab 26 is made of a relatively stiffer material than the material of the actuator 10 and the segment 28, the tab 26 will remove the composite slot. Part of the material of the segment 28 of the first portion 18 of the key 16 causes an undercut as shown in Figures 3 and 4. As a result, the insertion portion 20 is fastened to the composite groove key 16 by the co-action between the tab 26 and the portion of the segment portion 28. The segment portion 28 defines the configuration of the recess 30, which is reminiscent of the dovetail joint.

As shown in Figures 3 and 4, a portion of the transmission body 10, particularly portions of the segment portion 28 of the first portion 18 of the composite slot key 16, overlaps portions of the insertion portion 20, particularly portions of the tab 26. Thus, the insertion portion 20 can be held where it is located on the composite slot key 16. In use, the stressed surface 24 of the insertion portion 20 will experience a high force loading; these forces will push the insertion portion 20 into the segment portion 28 of the first portion 18 of the composite slot key 16, such that the force will It is passed to and through the insert 20 to the first portion 18 of the composite slot key 16, wherein the first portion 18 of the composite slot key 16 provides a large area of force and a reactive force.

The insertion portion 20 is securely fixed so as to avoid axial movement relative to the transmission body 10. The engagement between the tab 26 and the segment portion 28 of the composite slot key 16 causes the insertion portion 20 not to move in both axial directions. It is structurally known that the engagement between each tab 26 itself and the adjacent two segments 28 of the first portion 18 of the compound slot key 16 does prevent the insertion portion 20 from moving axially (two-axis direction) relative to the transmission body 10. . One side of each tab 26 is adjacent to the segment 28 of the first portion 18 adjacent the composite slot key 16. The abutment prevents relative movement between the transmission body 10 and the insertion portion 20 in a first axial direction; and the other side of each tab 26 is adjacent to the segment portion 28 of the first portion 18 adjacent the composite slot key 16. The abutment prevents relative movement between the transmission body 10 and the insertion portion 20 in a second axial direction (opposite to the first axial direction). Furthermore, the insertion portion 20 is securely fixed so as to avoid radial movement - in both radial directions, because of the two paired overlapped portions of the tabs 26 on the insertion portion 20. 40 is held between the transmission bodies 10, in particular between the outer surface 42 of the transmission body 10 and the two overlapping portions 44 of the segment portion 28 of the first portion 18 of the composite slot key 16. Furthermore, the engagement between the single tab 26 of the two pairs of overlapping portions 40 and the overlapping portions 44 of the two adjacent segments 28 of the first portion 18 of the composite slot key 16 allows the transmission body 10 and the insertion portion 20 to be engaged. Avoid moving in the radial direction. The frictional contact between the tab 26 and the segment portion 28 of the first portion 18 of the composite slot key 16 (and the frictional contact of the single tab 26 with the adjacent segment portion 28 of the first portion 18 of the composite slot key 16) prevents the insertion portion 20 from being blocked. A relative circumferential direction (in both directions) occurs between the transmission body 10 and the transmission body 10. However, the abutment between the force transmitting surface 25 (Figs. 2 and 6) on the insertion portion 20 and the force receiving surface 29 on the segment portion 28 of the first portion 18 of the composite groove key 16 can surely prevent the insertion portion 20 from being opposed. The transmission body 10 moves in a direction around the clock. Further, it is structurally known that when a force is transmitted through a force transmitting surface FTF (Fig. 1) of the sprocket S to a portion of the force receiving surface 24 of the insertion portion 20 having a specific surface area, the force is It will then be transferred from the insertion portion 20 to the stressed surface 29 of the segment portion 28 of the first portion 18 of the composite slot key 16, and the force-receiving surfaces 29 will have a surface area substantially larger than the particular surface. area. As such, the relatively rigid insert 20 of the composite slot key 16 can be used to withstand highly concentrated forces on a small specific area and transfer the forces to a softer surface having a surface area substantially greater than the particular area. On the drive body material. This configuration allows the slot keys 12 and 14 to be relatively wear resistant.

It can be ascertained that the insertion portion 20 (later commensurate with the insertions) can have a curvature as needed, and its curvature is the curvature of the outer surface 42 of the transmission body 10 against which the insertion portion 20 abuts. Match. In embodiments where the insert 20 is stamped, this curvature can be easily produced by a tool for stamping.

In Fig. 5, the tapered portions 38 of the sides of the tabs 26 of the insertion portion 20 are rather rough. This is an expression of the roughness naturally obtained by the insertion portion 20 by the aforementioned press manufacturing. These surfaces of the tapered portion 38 may be slightly smoothed before the tab 26 is inserted into the segment portion 28 and an undercut is created (as particularly shown in Figures 3 and 4). However, it will be appreciated that the roughness of the sides of the tab 26 helps to increase the frictional grip, which allows the insertion portion 20 of the composite slot key 16 to be more securely secured in its position.

In Figure 6, the drive body shown has three composite slot keys. However, it will be appreciated that many of the benefits of the present invention can also be achieved by a transmission having a composite slot key. Indeed, in accordance with the present invention, the transmission body will have at least one composite slot key.

The transmission body with the composite slot key of the second embodiment is designated by the numeral 50 in FIG. The transmission body 50 is similar to the transmission body 10 except that the transmission body has different arrangements of composite slot keys. In FIG. 7, the composite slot key 52 is integrated with the composite slot key 52. One of the first portions 54 is made and made of the same material. The composite slot key 52 further includes a second portion 56 that includes an insert that is made of a material that is different from the material of the transmission body 50 and that is harder than the material of the transmission body 50. In the composite slot key 52, there is a force bearing surface 58 formed on the second portion 56 of the insert or composite slot key 52. The transmission body 50 includes a locator spline 60 and regular splines 62. The second portion and the insertion portion 56 are made of a relatively hard material such that the transmission body 50, the positioning groove member 60, the common slot key 62, and the first portion 54 of the composite slot key 52, which are made of a softer material, are preferably better. Wear resistance. Since the conventional transmission body only has the slot key made of the same soft material as the transmission body 10 and does not include the slot key 16 having at least one insertion portion made of a hard material, the transmission body 50 is special compared to the conventional transmission body. It is the slot keys 52, 60 and 62 that wear at a slower speed.

The second portion of the composite slot key 52 is an insertion portion 56 that includes a single triangular tab 64 that cooperates with the first portion 54 of the composite slot key 52 to secure the insertion portion 56 in place. The first portion 54 of the composite slot key 52 is formed by two projections 66 extending axially, wherein the segment portion 66 is integrally formed with the transmission body 50. The segment portion 66 is separated and together define a recess having a triangular shape having a triangular shape complementary to the triangular shape of the tab 64. The tabs 64 have side walls 68 which are tapered in arrangement because, as the side walls 68 extend from the lower surface 70 to the upper surface 72, they are inclined toward each other, the structure of which is best seen in FIG. In Fig. 9, the segment portion 66 has a complementary angular side wall 74, and the portion of the segment portion 66 is interspersed with The portions of the tabs 64 of the entry portion 56 are superposed so that the insertion portion can be securely held in place at the appropriate position of the composite slot key. The side wall 74 can be cut such that the side wall 74 extends radially when the insert is positioned within the composite slot key. The segment portion 66 can then be coined or upset so that it has the general shape shown in FIG. The tapered portion of the tab 64 can be obtained in the same manner as the tapered portion described in Figures 2 through 6, if the insert portion 56 is also stamped and punched. As shown in Figure 9, a portion of the transmission body 50, particularly the portion of the segment portion 66 of the first portion 54 of the composite slot key 52, and a portion of the insertion portion 56, particularly the portion of the tab 64, will overlap such that the insertion portion 56 can It is held in place at the composite slot key 52.

As with the insertion portion 20 of the first embodiment, the insertion portion 56 is securely fixed to avoid radial or axial movement relative to the transmission body 50. The force acting on the stressed surface 58 of the insert 56 is transmitted to the first portion 54 of the composite slot key 52. On the one hand, under the coaction between the side wall 68 of the side of the tab 64 and the adjacent segment 66 of the first portion 54 of the composite slot key 52, and on the other hand, the side wall on the other side of the tab 64 Together with the adjacent segment portion 66 of the first portion 54 of the composite slot key 52, the insertion portion 56 can be retained to avoid axial movement relative to the transmission body 50 (or vice versa). At the same time, the interaction between the lower surface 70 of the insertion portion 56 and the outer surface 76 of the transmission body 50 prevents the insertion portion 56 from moving radially inward relative to the transmission body 50. Moreover, the interaction between the side walls 68 of the sides of the tabs 64 and the adjacent segments 66 of the first portion 54 of the composite slot key 52 prevents the insertion portion 56 from moving radially outward relative to the transmission body 50.

A third embodiment of a transmission with a composite slot key is numbered in Figure 10 80 mark. The transmission body 80 is similar to the transmission bodies 10 and 50 except that the transmission body has different arrangements of composite slot keys. In FIG. 10, the composite slot key 82 includes a first portion 84 that is integrated with the transmission body 80 and that is fabricated from the same material as the transmission body 80. The composite slot key 82 also includes a second portion 86 that includes an insert that is made of a material that is different from the material of the transmission body 80 and that is harder than the material of the transmission body 50. In the composite slot key 82, there is a force bearing surface 88 formed on the second portion 86 of the insert or composite slot key 82. The transmission body 80 includes a locator spline 90 and regular splines 92. The second portion and the insertion portion 86 are made of a relatively hard material such that the transmission body 80 made of a softer material, the positioning groove member 90, the common groove key 92, and the first portion 84 of the composite groove key 82 are preferably provided. Wear resistance.

The second portion of the composite slot key 82 is an insertion portion 86 that includes two generally shaped tabs 94 that cooperate with the first portion 84 of the composite slot key 82 to secure the insertion portion 86 in place. . The first portion 84 of the composite slot key 82 includes three projections and axially extending sections 96 and two raised cylinders 98, wherein the segments 96 and the posts 98 are all integrated with the transmission 80. The segment portion 96 is separated and defines two recesses together; and the cylinder 98 is located in the recesses. The cylinder 98 and the recess are simultaneously formed by a hollow mill. The tabs 94 each have a bore therethrough which tapers such that they have a given diameter at the top, near the upper surface 100 of the insert 86, and at the bottom, near the lower surface 102. The diameter is less than the given diameter. The diameter of the opening at the bottom of the tab 94 may be the same as or larger than the diameter of the cylinder 98, such that the insertion portion 86 may To be positioned in position in the composite slot key 82, as shown in Figure 10 near the top. As a means of securing the insertion portion 86 to the transmission body 80, the cylinders 98 can be coined or upset such that they can be shortened and their diameters increased. If possible, a portion of the post 98 can be coupled to the drive body 80 to cover a portion of the insert 86, particularly a portion of the tab 94, as is best seen in FIG. As previously described for the insert, the insert 86 is securely secured to avoid radial or axial movement relative to the drive body 80. The force acting on the stressed surface 88 of the insert 86 is transmitted to the first portion 84 of the composite slot key 82.

A further embodiment of a transmission having a composite slot key, designated by the numeral 110, is shown in FIG. In this transmission body 110, an insertion portion 112 having a tab 114 is proposed, wherein the tab 114 is partially defined by two tapered incomplete openings. The insertion portion 112 can be held by the two cylinders 116, and the two cylinders 116 can be coined or upset as in the previous embodiment to overlap the portion of the insertion portion 112, thereby It is fixed to the composite slot key 118 as shown in FIG. As previously described for the insert, the insert 112 can be securely secured to avoid radial or axial movement relative to the drive body 110. The force acting on the insert 112 is transmitted to the first portion of the composite slot key 118.

An embodiment of the fifth transmission with a compound slot key is labeled 120 and is shown in FIG. The composite slot key 122 includes a first portion 124 that is integrated with the transmission body 120 and is made of the same material as the transmission body 120, and a second portion 126 that is an insertion portion. The insert 126 is generally rectangular in shape and has a tapered opening therethrough and designated 127. The rivet 128 is received in the opening 127 and extends through the transmission body 120, thereby Portion 126 is fixed and fastened to transmission body 120. The bulbous portion 129 of the rivet 128 bears against the inside surface of the transmission body 120, and one of the tapered portions of the rivet sleeve 131 abuts against the tapered opening 127 in the insertion portion 126. As such, the rivet 128 secures the insertion portion 126 to the transmission body 120 and avoids relative movement between the insertion portion 126 and the transmission body 120 in either axial direction. The rivet 128 is also used to prevent the insertion portion 126 from moving radially outward from the transmission body 120, and the interaction between the insertion portion 126 and the transmission body 120 prevents the insertion portion 126 from moving radially inward relative to the transmission body 120. It will be appreciated that in the foregoing embodiments, the cylinders made of the material of the transmission body 120 are flattened to cover the portion of the insertion portion, and rivets or other connectors may be used instead of the cylinders. . Of course, the post can be used to replace the rivet 128 and flatten it to cover the portion of the insert.

An embodiment of the sixth transmission with a compound slot key is designated 130 in FIG. The transmission body 130 includes a composite slot key 132 that includes a first portion 134. The first portion 134 is integrated with the transmission body 130 and is part of the transmission body 130. The composite slot key 132 further includes an insertion portion 136 that is rectangular and includes two depending tabs 138. The tab 138 is integral with the insertion portion 136 and extends generally at a vertical angle from a major portion of the insertion portion 136. An opening of the numeral 139 is formed on the transmission body 130, and a portion of the opening 139 extends through a portion of the first portion 134 of the compound channel key 132. The tab 138 is inserted into the opening 139 and is in frictional contact with the side wall of the opening 139, thereby securing the insertion portion 136 to the position illustrated on the composite slot key 132 shown in the upper portion of FIG. In Figures 19 and 20, the tab 138 is shown as having an exclusive taper, wherein the tabs 138 are free. The end system is wider than the bent end. The large taper is shown to illustrate a method of creating a frictional engagement between the insert 136 and the drive body 130. As shown in Fig. 20, when the free end or end of each tab 138 is slightly wider than the other end (the closest end of the tab 138), the width of the free end is slightly larger than the diameter of the opening 139. The tab 138 will push the material of some of the drive body 130 and push it radially and inwardly to create a structure that may be referred to as a shoulder (number 140). As shown in enlarged view 20, the material of some of the drive body 130 (indicated by numeral 142) will rebound and will indeed cover portions of each tab 138. In the case where the tab is not tapered but is slightly larger than the diameter of the opening 139, the same coverage condition is also available, although the coverage is microscopic.

The technical content and the technical features of the present disclosure have been disclosed as above, but those skilled in the art should understand that the teachings and disclosures of the present disclosure are disclosed without departing from the spirit and scope of the disclosure as defined by the appended claims. Can be used for various substitutions and modifications. For example, many of the processes disclosed above may be implemented in different ways or in other processes, or a combination of the two.

Moreover, the scope of the present invention is not limited to the particular process, machine, manufacture, composition, means, method or method of the particular embodiments disclosed. It should be understood by those of ordinary skill in the art that, based on the teachings of the present disclosure, the process, the machine, the manufacture, the composition of the material, the device, the method, or the steps, whether present or future developers, The revealer performs substantially the same function in substantially the same manner, and achieves substantially the same result, and can also be used in the present disclosure. Therefore, the following The scope of the patent application is intended to cover such processes, machines, manufactures, components, devices, methods or steps.

10‧‧‧ Drive

12‧‧‧Intermediate slot key

14‧‧‧Ordinary slot key

16‧‧‧Composite slot key

18‧‧‧Part 1

20‧‧‧Insert Department, Part 2

22‧‧‧ Forced surface

24‧‧‧ Forced surface

25‧‧‧Power surface

26‧‧‧1

28‧‧‧Segment

29‧‧‧ Forced surface

30‧‧‧ Groove

32‧‧‧ upper surface

34‧‧‧ lower surface

36‧‧‧cutting area

38‧‧‧Cone

40‧‧‧ overlap

42‧‧‧ outer surface

44‧‧‧ overlap

50‧‧‧ transmission body

52‧‧‧Composite slot key

54‧‧‧Part 1

56‧‧‧Part II, Insertion Department

58‧‧‧ Forced surface

60‧‧‧ positioning slot key

62‧‧‧Ordinary slot key

64‧‧‧1

66‧‧‧section

68‧‧‧ side wall

70‧‧‧ lower surface

72‧‧‧ upper surface

74‧‧‧ side wall

76‧‧‧ outer surface

80‧‧‧ transmission body

82‧‧‧Composite slot key

84‧‧‧Part 1

86‧‧‧Part II, Insertion Department

88‧‧‧ Forced surface

90‧‧‧ positioning slot key

92‧‧‧Ordinary slot key

94‧‧‧1

96‧‧‧section

98‧‧‧Cylinder

100‧‧‧ upper surface

102‧‧‧lower surface

110‧‧‧ transmission body

112‧‧‧Insert Department

114‧‧‧1

116‧‧‧Cylinder

118‧‧‧Composite slot key

120‧‧‧ transmission

122‧‧‧Composite slot key

124‧‧‧Part I

126‧‧‧Part II, Insertion Department

127‧‧‧ openings

128‧‧‧ Rivets

129‧‧‧ bulbous part

130‧‧‧Transmission body

131‧‧‧rivet casing

132‧‧‧Composite slot key

134‧‧‧Part I

136‧‧‧Insert Department

138‧‧‧1

139‧‧‧opening

140‧‧‧ shoulder

142‧‧‧Materials

DB‧‧‧ drive body

DBS‧‧‧ slot key

FRF‧‧‧ force receiving surface

FTF‧‧‧ force transmission surface

G‧‧‧ Groove

HF‧‧·Wheel flange

RH‧‧‧ rear wheel hub

S‧‧‧ gear

SHS‧‧‧Gear hole

1 is a partial exploded view illustrating a rear bicycle hub and a set of gears arranged on the hub; FIG. 1A is a side elevational view of the gear of FIG. 1; FIG. 2 shows a transmission body, an insertion portion and a composite groove according to an embodiment of the present invention. Figure 3 is a cross-sectional view taken along line 3-3 of Figure 2; Figure 4 is an enlarged view of the area indicated as 4 in Figure 3; Figure 5 shows the extension from the insertion portion in the previous figure Figure 6 is an end view of the bicycle hub after an embodiment of the present invention, showing three composite slot keys including an insertion portion; Figure 7 is an exploded perspective view of the transmission body of the second embodiment of the present invention, Figure 8 is a perspective view of the insertion portion of Figure 7; Figure 9 is a sectional view taken along line 9-9 of Figure 7; Figure 10 is a transmission body of another embodiment of the present invention. 3D exploded view showing the insertion portion and a composite groove key; FIG. 11 is a perspective view of the insertion portion in FIG. 10; FIG. 12 is a cross-sectional view taken along line 12-12 of FIG. 10; FIG. 13 is another embodiment of the present invention. An exploded perspective view of a transmission body of an embodiment showing an insertion portion and a composite slot key Figure 14 is a perspective view of the insertion portion of Figure 13; Figure 15 is a cross-sectional view taken along line 15-15 of Figure 13; Figure 16 is an exploded perspective view of a transmission body according to still another embodiment of the present invention, showing the insertion portion and a composite slot key; Figure 17 is Figure 16 Figure 18 is a cross-sectional view of the transmission line taken along line 18-18 of Figure 16; Figure 19 is an exploded perspective view of a transmission body according to still another embodiment of the present invention, showing the insertion portion and a composite slot key; Figure 20 is a cross-sectional view taken along line 20-20 of Figure 19;

10‧‧‧ Drive

12‧‧‧Intermediate slot key

14‧‧‧Ordinary slot key

16‧‧‧Composite slot key

18‧‧‧Part 1

20‧‧‧Insert Department, Part 2

22‧‧‧ Forced surface

24‧‧‧ Forced surface

25‧‧‧Power surface

26‧‧‧1

28‧‧‧Segment

30‧‧‧ Groove

42‧‧‧ outer surface

Claims (10)

A transmission body for a bicycle hub, the transmission body being made of a first material and comprising at least one composite groove key, the composite groove key comprising a first portion, the first portion being made of the first material and comprising at least one a force surface, the composite groove key further comprising a second portion, the second portion comprising an insertion portion, the insertion portion being made of a second material, the second material being harder than the first material, the insertion portion comprising a a force receiving surface, a force transmitting surface and at least two overlapping portions, the at least two overlapping portions cooperating with at least two corresponding overlapping portions of the first portion of the composite groove key to fix the insertion portion on the composite groove key, At least a portion of the force transmitting surface of the insertion portion is in contact with at least a portion of the force receiving surface of the first portion of the composite groove key, and thus avoiding either axis between the transmission body and the insertion portion The relative axial movement is upwardly moved and the insertion portion is prevented from moving outwardly relative to the transmission body in a radial direction, wherein the insertion portion forms an undercut on the first portion of the composite groove key. The transmission body according to claim 1, wherein the insertion portion further comprises at least one protruding piece, and the at least two overlapping portions are disposed on the at least one protruding piece. A transmission body for a bicycle hub, the transmission body being made of a first material and comprising at least one composite groove key, the composite groove key comprising a first portion, the first portion being made of the first material and comprising at least one a force surface, the composite groove key further comprising a second portion, the second portion comprising an insertion portion, the insertion portion being made of a second material, the second material being harder than the first material, the insertion portion comprising a a force receiving surface, a force transmitting surface and at least two overlapping portions, the at least two overlapping portions cooperating with at least two corresponding overlapping portions of the first portion of the composite groove key to fix the insertion portion to the composite groove key The at least a portion of the force transmitting surface of the insertion portion is in contact with at least a portion of the force receiving surface of the first portion of the composite slot key, and thus the transmission body and the insertion portion are avoided. Performing a relative axial movement in either axial direction and avoiding the insertion portion to move outward relative to the transmission body in a radial direction, wherein the insertion portion further comprises at least one tab, the at least two overlapping portions being disposed at the at least one protrusion At least a portion of the tab is defined by at least a portion defining a sidewall of a tapered opening. A transmission body for a bicycle hub, the transmission body being made of a first material and comprising at least one composite groove key, the composite groove key comprising a first portion, the first portion being made of the first material and comprising at least one a force surface, the composite groove key further comprising a second portion, the second portion comprising an insertion portion, the insertion portion being made of a second material, the second material being harder than the first material, the insertion portion comprising a a force receiving surface, a force transmitting surface and at least two overlapping portions, the at least two overlapping portions cooperating with at least two corresponding overlapping portions of the first portion of the composite groove key to fix the insertion portion on the composite groove key, At least a portion of the force transmitting surface of the insertion portion is in contact with at least a portion of the force receiving surface of the first portion of the composite groove key, and thus avoiding either axis between the transmission body and the insertion portion Moving upward relative to the axial direction and preventing the insertion portion from moving outward relative to the transmission body in the radial direction, wherein the insertion portion further comprises at least one protruding piece, and the at least two overlapping portions are disposed on the at least one protruding piece The tab has a triangular shape. A transmission body for a bicycle hub, the transmission body being made of a first material and comprising at least one composite groove key, the composite groove key comprising a first portion, the first portion being made of the first material and comprising at least one a force surface, the composite slot key further comprising a second portion, the second portion comprising a plug The insertion portion is made of a second material that is harder than the first material, the insertion portion includes a force receiving surface, a force transmitting surface, and at least two overlapping portions, the at least two overlapping portions and the At least two corresponding overlapping portions of the first portion of the composite slot key are engaged to fix the insertion portion to the composite slot key, such that at least a portion of the force transmitting surface of the insertion portion and the composite slot key A portion of the force-receiving surface is in contact with each other, and the relative axial movement between the transmission body and the insertion portion in either axial direction is avoided, and the insertion portion is prevented from being radially relative to the transmission body. Moving outwardly, wherein the insertion portion further comprises at least one protruding piece disposed on the at least one protruding piece; a portion of the protruding piece surrounding the opening forming the at least two overlapping portions of the insertion portion. A transmission body for a bicycle hub, comprising: a first material for fabricating the transmission body; and at least one composite groove key, the composite groove key comprising: a first portion, made of the first material, and comprising At least one force receiving surface; and a second portion comprising an insertion portion, the insertion portion being made of a second material, the second material being harder than the first material, the insertion portion comprising a force surface, a pass a force surface and a connecting device mechanically coupling the insertion portion to the transmission body to hold the insertion portion to the transmission body, at least a portion of the force transmitting surface of the insertion portion At least a portion of the force receiving surface of the first portion of the composite slot key is in contact with each other such that relative axial movement between the transmission body and the insertion portion in either axial direction is avoided and the insertion portion is prevented from being radially opposed to The transmission body moves outward, wherein the connection The device is integrated with the transmission system and partially covers the insertion portion. A transmission body according to claim 6, wherein the insertion portion has a tapered opening, the opening passing through the insertion portion, and a portion of the insertion portion surrounding the opening is engaged with the connecting device. A transmission body according to claim 6, wherein the insertion portion has a tapered opening, the opening passing through the insertion portion, and a portion of the insertion portion surrounding the opening is engaged with the connecting device. A transmission body for a bicycle hub, the transmission body being made of a first material and comprising at least one composite groove key, the composite groove key comprising a first portion, the first portion being made of the first material and comprising at least one a force surface, the composite groove key further comprising a second portion, the second portion comprising an insertion portion, the insertion portion being made of a second material, the second material being harder than the first material, the insertion portion comprising a a force receiving surface, a force transmitting surface and at least one tab, the at least one tab being in frictional contact with at least two portions of the transmission body to fix the insertion portion on the composite slot key, such that the insertion portion At least a portion of the force surface is in contact with at least a portion of the force receiving surface of the first portion of the composite slot key, and thereby avoiding relative axial movement between the transmission body and the insertion portion in either axial direction And causing the insertion portion to be frictionally blocked relative to the movement of the transmission body in the radial direction, wherein the at least two portions of the transmission body define an opening, the at least one tab is located in the opening, and the At least one sudden Greater than the diameter of the tip of the opening. The transmission body of claim 9, wherein the insertion portion comprises two tabs.