TWI688515B - Rear power transmission - Google Patents

Abstract

The present invention provides a rear power transmission, which mainly includes a hub mechanism, a sprocket changing mechanism, a shift switching configuration and a shift operating member; the present invention utilizes the shift operation provided by the shift operating member The member can drive the sprocket group to be movably arranged, so that the stopper moves relative to the sprocket changing mechanism in the release direction to reach the plurality of shifting positions, so that the sprocket group can be independently changed to all The position to be shifted is configured by the sprocket wheel group's autonomous axial displacement, so as to reduce the amount of operation deformation of the bicycle chain and each meshing member of the bicycle during operation, and to improve the smoothness of the chain in the running state.

Description

Rear power transmission

The invention relates to a rear power transmission, in particular, a sprocket set is configured to autonomously displace axially to reduce the amount of operation deformation of the bicycle chain and each meshing member of the bicycle during operation, so as to improve the chain in operation Innovative structural designer of smoothness.

According to the press, bicycles are currently the most popular leisure sports in the world, and bicycle sports are also following the trend, which has caused many enthusiasts to purchase and use them. The most commonly used transmissions in bicycles are usually set in multiple different configurations of the same shaft mechanism. On the large and small chainrings, the so-called bicycle sprocket set, the user can choose the speed of different sprocket meshing ratios during the shift operation, which makes the operation of the bicycle more convenient. For example, the high-speed gear and the low-speed gear can be changed to achieve the riding The portability of the pedal force application process. The conventional transmission includes a plurality of transmission joints and a mechanical connection member quoting a small sprocket of the joint. The mechanical connection member meshes and drives the plurality of joint transmission mechanisms with each other. One of the joints connects the transmission to the bicycle, and the other joint is provided with a chain guide. The gear wheels correspond to different bicycle speeds. The chain guide can be positioned at various different positions through the rotating movement of the mechanical connecting member. , Users can more easily use the variable speed transmission to achieve the joy of speed change and riding.

However, it is known that the triangle meshing relationship between the chain and the main sprocket, the chain guide and the variable speed sprocket group is obviously deformed by the chain guide while the chain is rotating, regardless of the plan view or side view, so that the chain Those affected by the smoothness of operation.

Therefore, in view of the problems of the above-mentioned conventional structure, how to develop an innovative structure with more ideal and practicality, and actually use the ardent expectations of consumers, is also the goal and direction of the relevant industry to work hard to develop breakthroughs. In view of this, the inventor of this case has designed the invention in detail based on many years of design experience After the components have undergone practical and prudent evaluation, we finally have a practical invention.

That is, the main purpose of the present invention is to provide a rear power transmission; the problem to be solved is to solve the problem that the chain is connected with the main sprocket and the chain guide while the chain guide is provided with the chain guide. And the triangle meshing relationship of the variable speed sprocket set is obviously deformed from the top or side view, so that the smooth operation of the chain is affected. The technical points of the problem are mainly solved by It includes a hub axle with a sprocket changing mechanism extended at one end; at least one shift operating member is embedded in the outer peripheral wall of the sprocket shifting mechanism. The shift operating member includes a plurality of positioning detents, and each positioning detent has a bottom For the pivot column, the free end of each positioning detent is respectively provided with a dialing end, so that each dialing end is exposed outside the sprocket changing mechanism; according to the above, one end of the sprocket changing mechanism is provided with a detent, the detent One end of the moving part can drive each of the dialing ends of the shifting operation member to make a reciprocating dialing movement; a shifting configuration includes a shaft sleeve, the shaft sleeve is an axial sleeve covered and fixed on the sprocket changing mechanism, and the shaft sleeve A frame hole is opened corresponding to the position of the shifting operation member of the sprocket changing mechanism for the shifting operation member to be exposed, wherein a plurality of embeddings are evenly arranged on the outer rim of each sleeve, and each embedding is axial Extending, the outer end surface of the embedding convex is respectively covered with a positioning elastic detent piece, and the surface of the positioning elastic detent piece is provided with a plurality of elastic concave portions and elastic convex portions and are arranged alternately with each other; a sprocket group includes a plurality of large to small outer The shaft group of the sprocket body of the diameter is co-constructed, and the space position between each sprocket body is defined as an interval space, and a shaft group part is provided in the center of the sprocket group, and the shaft group part is provided with a A linking member of the shaft sleeve that can be set in the shifting configuration is provided with a plurality of fitting recesses in the linking member, and each fitting recess is matched and fixed to each fitting projection of the sprocket conversion mechanism so that The sprocket set cooperates with the shifting configuration; each sprocket plate body of the sprocket set is fitted into the position of the elastic concave portion provided by the positioning spring piece in the normal state, and the positioning spring catch The position of the elastic convex portion provided by the blade is located at each space of each sprocket body, and the space is also located at each of the dialing end positions of the plurality of positioning detents of the shift operation member, so that The sprocket body of the sprocket set The spacing space can be used by the plurality of positioning detents of the shifting operation member to utilize each of the dialing ends to drive the sprocket set for lateral displacement movement to achieve a shifting function; thereby innovating a unique design, the present invention The shifting operation member provided on the shifting operation member can move the sprocket group to be movably arranged, so that the stopper moves relative to the sprocket changing mechanism in the release direction to reach the plurality of shifting positions, so that the chain The wheel set can be selected to change to the desired shifting position autonomously, and the sprocket set is configured to autonomously displace axially to reduce the amount of operation deformation of the bicycle chain and the various meshing components of the bicycle during operation, so as to improve the running state of the chain Smoothness.

〔this invention〕

10: hub of spindle

101: Sprocket change mechanism

102: first axis segment

1021: pivot slot

1022: deflection groove

103: Guide

104: second axis segment

105: fixing hole

106: Long slot

107: inner shaft room

108: Introduction Department

109: Stepped barrier

11: Variable speed switching configuration

12: Inlay

121: Hook hole

13: bushing

14: Frame hole

15: positioning snap

151: Elastic convex part

152: Elastic recess

153: Hook part

16: moving parts

161: Group Department

162: solid group hole

163: Pin group hole

164: Spring

165: Positioning column

166: fixed pin

167: Pin group connection hole

17: stopper

171: Penetration

172: pin hole

173: Pin

20: linkage element

21: fitting groove

22: fixed group end

30: Bumper

31: Switch end

32: group connection hole

33: Group sales

40: Variable speed operating member

41: Pivot

42: positioning catch

43: dial-end

44: deflection column

45: elastic element

50: Sprocket set

51: Shaft group

52: linkage

53: recessed

54: Sprocket body

55: Interval space

56: Restriction

Figure 1: is a perspective view of the combination of the rear power transmission of the present invention.

Figure 2: It is an exploded combination diagram of the rear power transmission of the present invention.

Figure 3: This is an end view of the sprocket set of the rear power transmission of the present invention.

Figure 4: It is a combination diagram of the hub spindle and shifting arrangement of the rear power transmission of the present invention.

Figure 5: is an exploded view of the components of the rear power transmission of the present invention.

Figure 6: is a perspective view of the components of the rear power transmission of the present invention.

Fig. 7 is a motion diagram 1 of the movable member and its shifting operation member of the rear power transmission of the present invention.

Fig. 8 is a second action diagram of the movable member and its shifting operation member of the rear power transmission of the present invention.

Figure 9 is a schematic diagram 1 of the operation of the rear power transmission of the present invention, which shows the state of non-shifting.

Figure 10: It is a partially enlarged view of Figure 9.

Fig. 11 is a second schematic diagram of the operation of the rear power transmission of the present invention, which shows the state of shifting.

Figure 12: Partly enlarged view of Figure 11.

Fig. 13 is a schematic diagram 3 of the operation of the rear power transmission of the present invention, which shows the shifted state.

Fig. 14 is a partially enlarged view of Fig. 13.

Please refer to Figures 1~14, which are the preferred embodiments of the rear power transmission of the present invention. However, these embodiments are for illustrative purposes only, and are not limited by this structure in the patent application. They include: a Hub hub (10), the hub hub (10) is used to axle the rim axis of the bicycle, wherein one end of the hub hub (10) is extended with a sprocket changing mechanism (101); the sprocket changing mechanism (101) ) Is divided into a first shaft section (102) and a second shaft section (104), a first-order shaped flange (109) is formed between the first shaft section (102) and the second shaft section (104), The first shaft section (102) is provided with a plurality of pivoting grooves (1021) at predetermined positions. A pivoting deflection groove (1022) is formed at one end of the pivoting groove (1021). The outer periphery of the sprocket changing mechanism (101) At least one variable speed operating member (40) is embedded in the wall position, the variable speed operating member (40) includes a plurality of positioning detents (42), a pivot post (41) is provided at the bottom of each positioning detent (42), and each positioning The free ends of the detents (42) are respectively provided with a dialing end (43), the pivot post (41) of the positioning detent (42) is incorporated in the pivoting groove (1021), and the positioning detent (42) ) The dial end (43) is placed in the deflection groove (1022), and the bottom end of the positioning detent (42) is provided with a deflection column (44), so that each dial end (43) is exposed Outside the sprocket changing mechanism (101); each pivot post (41) of the shift operating member (40) houses an elastic element (45) to enable the positioning detent of the shift operating member (40) (42) When the use of pivoting produces jams, the elastic element (45) can be compressed by pressing the positioning detent (42) to push down to return to the original state; then the stepped flange (109) is provided with a predetermined position A guide portion (103), the guide portion (103) provides a linking element (20), wherein the linking element (20) is corresponding to the deflection column (44) of each positioning detent (42) Cooperate with the fitting groove (21) for positioning the embedded card, so that the fitting groove (21) The deflection column (44) fitted into the positioning detent (42) is positioned, and one end of the linking element (20) is provided with a fixed group end (22); and the first part of the sprocket changing mechanism (101) An inner shaft chamber (107) is axially arranged in the second shaft section (104), and an introduction portion (108) is provided at a predetermined position of an end surface of the second shaft section (104), and the introduction portion (108) provides an integrated A detent member (30). A set of contact holes (32) is radially set at one end of the detent member (30), and a detent end (31) is provided at the other end. The detent end (31) is fixedly provided with a bicycle speed changer Drive cable (not shown); and the set of connecting holes (32) is used to set a set of pins (33), and the outer edge of the second shaft section (104) corresponds to the lead-in portion (108) through a long Slot hole (106), the long slot hole (106) provides that the set of pin (33) extends radially outward, so that the other end of the set of pin (33) is further fixed to a movable member (16) A pin group connecting hole (167), wherein the movable member (16) is provided with a group of parts (161), the group of parts (161) is a shaft grouped into the position of the second shaft section (104), so that the stopper (30) The movable member (16) can be driven to reciprocate on the second shaft section (104), and the movable member (16) is provided with a fixed set of holes (162). The fixed set of holes (162) is The fixed group end (22) of the linkage element (20) is assembled. After the assembly, a fixed pin (166) is fixed in a pin group hole (163) of the movable member (16) to further force The fixed group end (22) of the linkage element (20) is tightly fixed, so that the stopper (30) synchronously drives the movable element (16) and the linkage element (20) for linkage; and the movable element (20) 16) A positioning post (165) is protrudingly provided on the front and rear ends, and each positioning post (165) is respectively set with a spring (164), and the spring (164) at one end is blocked by the sprocket changing mechanism ( 101) The stepped retaining edge (109) is limited, and the spring (164) at the other end is located at a blocking member (17), wherein the blocking member (17) has a penetration portion (171) And is fixed at a predetermined position of the second shaft section (104), so that the detent member (30) can generate an elastic reset function when driven relative to the movable member (16), and the detent member (30) reaches the drive Each of the dialing ends (43) of the shifting operating member (40) is used for the purpose of reciprocating dialing movement; following the above, the stopper (17) is fixed to the second of the sprocket changing mechanism (101) The way of the shaft section (104) is that a plurality of fixing holes (105) are arranged on the ring of the second shaft section (104), and the stopper (17) is provided with a pin hole (172) corresponding to the fixing hole (105), The pin hole (172) and the fixing hole (105) are connected through a pin (173) so that the stopper (17) is fixed to the second shaft section of the sprocket changing mechanism (101) (104); a variable speed switching configuration (11), including a shaft sleeve (13), the shaft sleeve (13) is an axial sleeve covered and fixed on the sprocket changing mechanism (101), the shaft sleeve (13) corresponds to A frame hole (14) is opened at the position of the shifting operation member (40) of the sprocket changing mechanism (101) for the shifting operation member (40) to be exposed, wherein the outer ring edge of each bushing (13) is arranged There are a plurality of undercuts (12), each of the undercuts (12) extends axially, and the outer end surfaces of the undercuts (12) are respectively covered with a positioning elastic tab (15) to make the undercuts (12) on both sides A buckle hook hole (121) is provided, and the positioning elastic catch piece (15) corresponds to the buckle hook hole (121) with a buckle hook portion (153), so that the buckle hook portion (153) is hooked to the buckle hook hole (121) Positioning, and a plurality of elastic concave parts (152) and elastic convex parts (151) are arranged on the surface of the positioning elastic piece (15) and are arranged alternately with each other; a sprocket set (50) is used to mesh with the bicycle The chain is used for multi-stage speed change. The sprocket set (50) includes a plurality of sprocket plates (54) with a large to small outer diameter. The shaft set is co-structured, and is positioned at a suitable position on the bicycle by a plurality of restricting pieces (56) (Not shown in the figure), and each of the sprocket disc bodies (54) is spaced apart to define a space (55), and a shaft group portion (51) is provided in the center of the sprocket group (50). The shaft group part (51) is provided with a linking member (52) which can just fit the shaft group on the bushing (13) of the shift switching arrangement (11), and the linking member (52) is provided with a plurality of recessed recesses (53) ), each of the fitting recesses (53) is fitted and fixed to the fitting projections (12) of the sprocket changing mechanism (101), so that the sprocket set (50) is adapted to the shift switching configuration (11) Under the normal condition, the sprocket disc body (54) is fitted into the position of the elastic concave portion (152) provided by the positioning spring piece (15), and the positioning spring piece (15) is provided The position of the elastic convex portion (151) is located in the space (55) of each sprocket body (54), and the space (55) is also located in the shifting operation The plurality of positioning ends (43) of the plurality of positioning detents (42) of the working member (40), so that the space provided by each sprocket body (54) of the sprocket set (50) ( 55), through the plurality of positioning detents (42) of the shifting operating member (40), each of the turning ends (43) can be used to drive the sprocket set (50) for lateral displacement movement by turning, and then Variable speed function.

When the user controls the bicycle variable speed drive cable to move the moving end (31) to change the speed, the moving member (30) drives the direction of the movable member (16) relative to the stopper (17) When it is displaced, it also synchronously drives the displacement of the interlocking element (20). When the interlocking element (20) is displaced, the shifting operation member (40) is dialed by the fitting groove (21) provided by the interlocking element (20) ) Each deflection column (44) of the positioning detent (42) is deflected by a predetermined angle, and the space (55) of each sprocket body (54) is located on the positioning detent ( 15) The position of the elastic convex portion (151) provided, and the spacing space (55) also positions each of the dialing ends (43) of the plurality of positioning detents (42) located on the shift operating member (40) When the deflection column (44) of the positioning detent (42) is deflected by a predetermined angle, the sprocket set (50) is also driven to perform a lateral displacement movement, as shown in Figures 8 to 14, the sprocket body (54) In the normal state, it is fitted into the position of the elastic concave portion (152) provided by the positioning spring piece (15), and after being turned, the sprocket body (54) is fitted into the positioning spring The position of the elastic convex portion (151) provided by the sheet (15) is made of elastic steel by using the positioning elastic latch piece (15), so the positioning elastic latch piece is used in the state of the elastic convex portion (151) (15) The elastic supporting force of itself, so that the sprocket disc body (54) supports the positioning elastic detent (15), and the positioning elastic detent (15) will be further elastically reset during the compression displacement, so that the The sprocket body (54) is displaced by a stroke distance to the shifting position, according to which the shifting function is achieved.

Thereby, according to the present invention, the shifting operation member (40) provided by the shifting operation member (40) can drive the sprocket set (50) to be movably arranged, so that the stopper (30) is relative to the sprocket The shifting mechanism (101) moves in the release direction to reach the plurality of shifting positions so that the sprocket set (50) It can be selected to shift to the desired shifting position autonomously. The sprocket set (50) is configured for autonomous axial displacement to reduce the amount of operation deformation of the bicycle chain and each meshing member of the bicycle during operation to achieve an increase The smoothness of the chain in operation.

It is added that the shifting operation member (40) and the cooperating linking member (20) member are in a plural shape and are evenly distributed around the first shaft section (102) of the sprocket changing mechanism (101) (As shown in Figure 6).

Summarizing the above description, the design of the above structure of the present invention can effectively overcome the shortcomings faced by the conventional invention, and further has many of the advantages and practical value mentioned above. Therefore, the present invention is a creative invention with excellent creativity, and in the same No identical or similar product creations or public uses have been seen in the technical field. Therefore, the present invention has met the requirements of "novelty" and "progressiveness" of the invention patent, and an application is filed according to law.

10: Hub mechanism

11: Variable speed switching configuration

12: Inlay

13: bushing

40: Variable speed operating member

50: Sprocket set

51: Shaft group

52: linkage

53: recessed

56: Restriction

Claims (7)

A rear power transmission includes: a hub spindle, one end of which is extended with a sprocket changing mechanism; at least one shift operating member is embedded at the outer peripheral wall position of the sprocket changing mechanism, and the shift operating member includes a plurality of positioning detents, each of which A pivot post is provided at the bottom of the positioning latch, and the free end of each positioning latch is respectively provided with a dial end, so that each dial end is exposed outside the sprocket conversion mechanism; following the above, one end of the sprocket conversion mechanism is provided with a A detent member, one end of the detent member can drive each dial end of the shift operation member to reciprocate dial movement; a shift switching configuration includes a shaft sleeve, the shaft sleeve is axially sleeved and fixed on the sprocket In the conversion mechanism, a frame hole is opened at the position of the shaft sleeve corresponding to the speed change operation member of the sprocket conversion mechanism for the speed change operation member to be exposed, wherein a plurality of embeddings are arranged on each outer edge of the shaft sleeve The embedding is an axial extension, and the outer end surface of the embedding is respectively covered with a positioning elastic detent, and the surface of the positioning elastic detent is provided with a plurality of elastic concave portions and elastic convex portions and are arranged alternately with each other; a sprocket set includes A plurality of sprocket body shaft groups with large to small outer diameters are co-constructed, and the space between each sprocket body is defined as a space, and a shaft group part is provided in the center of the sprocket group, the shaft The assembly part is provided with a linking member with a shaft set just in the bushing of the shift switching configuration, and the linking member is provided with a plurality of fitting recesses, and each fitting recess is matched and fixed to each of the sprocket conversion mechanisms The embedding, so that the sprocket set is linked with the shifting configuration; the sprocket pieces of the sprocket set are fitted in the elastic recessed portion provided by the positioning spring piece under normal conditions, And the position of the elastic convex portion provided by the positioning spring piece is located at each space of each sprocket body, and the space is also for each dial of the plurality of positioning detents located at the shift operating member Rotation end position, so that the space provided by each sprocket body of the sprocket group can be used by the plurality of positioning detents of the shifting operation member to drive the sprocket group by turning Lateral displacement Those who achieve the variable speed function through exercise. The subsequent power transmission according to claim 1, wherein the sprocket changing mechanism is provided with a first shaft segment and a second shaft segment, and a first-order flange is formed between the first shaft segment and the second shaft segment, A plurality of pivot grooves are provided in the predetermined position groove of the first shaft section, and a fan-shaped deflection groove is opened at one end of the pivot groove. The pivot column of the positioning detent of the shifting operation member is integrated into the pivot groove, And the turning end of the positioning detent is placed in the deflection groove, and the bottom end of the positioning detent is provided with a deflection column, and a guide portion is provided at a predetermined position of the stepped flange, the guide portion provides A linkage element is incorporated, wherein the linkage element corresponds to the deflection column recess of each positioning catch and is provided with a fitting groove that matches the positioning of the inlay card, so that the fitting groove is fitted into the deflection column for positioning, and one end of the linkage element is provided There is a fixed set of ends. The rear power transmission according to claim 2, wherein an inner shaft chamber is provided axially in the second shaft section of the sprocket changing mechanism, and an introduction portion is provided at a predetermined position on an end surface of the second shaft section, the introduction portion Provide a set of a moving member, one end of the moving member is radially provided with a set of contact holes, the other end is provided with a moving end, the set of contact holes is used to set a set of contact pins, and the outer edge of the second shaft section Corresponding to the lead-in part, a long slot hole is provided, the long slot hole provides that the set of pins protrudes radially outward, so that the other end of the set of pins is further fixed to a pin set hole of a movable part, wherein The movable part is provided with a set of parts, and the shaft of the group is integrated into the position of the second shaft segment, so that the stopper can drive the movable part to reciprocate on the second shaft segment, and the movable part is provided with There is a fixed group of holes for the fixed group end of the linking element to be assembled, and then fixed by a fixed pin in a pin group hole of the movable member after being assembled, to further tightly fix the linking element The fixed group end, so that the triggering element synchronously drives the movable element and the linking element to interlock, so that the triggering element achieves the purpose of driving each dialing end of the speed change operating member for reciprocating dialing movement. The rear power transmission according to claim 3, wherein a positioning post is protruded from the front and rear ends of the movable member, and each positioning post is set with a spring, and the spring at one end is blocked by the sprocket changing mechanism The stepped stop flange is limited, and the spring stop limit at the other end is located on a stop member, wherein the stop member has a penetration portion and is fixed at a predetermined position of the second shaft segment. The rear power transmission according to claim 4, wherein the stopper is fixed to the second shaft section of the sprocket changing mechanism by a plurality of fixing holes arranged on the ring of the second shaft section, and the stopper pairs The fixing hole should be provided with a pin hole, so that the pin hole and the fixing hole are connected through a pin member, so that the stopper member is fixed to the second shaft section of the sprocket changing mechanism. The rear power transmission according to claim 1, wherein an elastic element is accommodated inside each pivot column of the shift operation member. The subsequent power transmission according to claim 1, wherein the shift operation member and the associated linking element member are in a plural shape and are evenly distributed around the first shaft segment position of the aforementioned sprocket conversion mechanism.

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