A bicycle gear shift control device and its application

Abstract

The application belongs to the technical field of bicycles and provides a bicycle speed change control device and a hand changer applied by the device. The device comprises a hand changer main body, a cross support and a fixed support fixed in the hand changer main body, a main shaft rivet provided on the cross support and provided with a winding disc and a connecting sheet, a ratchet connected with the winding disc, a gear-in tooth fixedly connected with the ratchet and rotatably arranged in the fixed support, a gear-in and out shifting lever shaft sleeve coaxially and rotatably sleeved on the main shaft rivet, a gear-in shifting lever assembly and a gear-out shifting lever assembly sleeved on the gear-in and out shifting lever shaft sleeve and rotatable therearound, and a pin shaft arranged in the hand changer main body and provided with a gear-in and out shifting limiting pawl spring and a gear-in and out shifting limiting pawl. The device has a small number of parts, a simple assembling process, reduced production cost and maintenance difficulty, and can realize stable and reliable single or continuous gear-in and gear-out operations.

Description

Technical Field

[0001] This invention relates to the field of bicycle technology, specifically a bicycle gear shifting control device and its application in manual shifting. Background Technology

[0002] Road bikes have become increasingly popular in China in recent years due to their lightweight and high-speed characteristics. Shifters (integrating brakes and gear levers) are a key component of road bikes, and their performance directly affects the riding experience. Most road bike shifters on the market currently use two independent levers to control upshifting and downshifting respectively. To achieve this function, the internal shifting control mechanism of existing shifters is often quite complex, using numerous components, resulting in complex structures, high assembly difficulty, increased production costs, and increased maintenance complexity.

[0003] Therefore, in view of the above situation, there is an urgent need to provide a bicycle gear shifting control device and its application in manual shifting, so as to overcome the shortcomings in current practical applications. Summary of the Invention

[0004] The purpose of this invention is to provide a bicycle gear shifting control device and its application in a manual shifter, aiming to solve the problems in the background art mentioned above.

[0005] This invention is implemented as follows: a bicycle gear shifting control device, comprising:

[0006] The main body of the hand-operated transformer, as well as the cross bracket and fixed bracket fixed inside the main body of the hand-operated transformer;

[0007] A spindle rivet, wherein the spindle rivet is mounted on a cross bracket and has a winding reel and a connecting piece on it;

[0008] Ratchet, the ratchet being connected to the winding spool;

[0009] An advance tooth that is fixedly connected to the ratchet and rotatably disposed within the fixed bracket;

[0010] A forward / reverse shift lever sleeve that is coaxially and rotatably fitted onto the main shaft rivet;

[0011] An advance shift lever assembly and an unshift shift lever assembly are sleeved on the advance / reverse shift lever bushing and can rotate around it.

[0012] And a pin is provided in the main body of the manual shifter, and the pin is provided with a gear shifting limit pawl spring and a gear shifting limit pawl.

[0013] As a further aspect of the present invention: the gear shift lever assembly includes a gear shift lever, a gear shift pawl shaft mounted on the gear shift lever, and a gear shift pawl rotatably sleeved on the gear shift pawl shaft.

[0014] The shift pawl is kept in contact with the fixed bracket by the shift pawl spring, and in the shifting state, the shift pawl is kept engaged with the shift gear.

[0015] The shift lever is also equipped with a reset coil spring.

[0016] As a further aspect of the present invention: the connecting piece is provided with a hole for the gear shift pawl shaft to pass through, so that when the gear shift lever rotates, the connecting piece can be driven to rotate synchronously through the gear shift pawl shaft.

[0017] The bottom of the advance pawl shaft is also fitted with a retaining spring.

[0018] As a further aspect of the present invention: the deceleration lever assembly includes a deceleration lever, a deceleration pawl shaft mounted on the deceleration lever, and a deceleration pawl rotatably sleeved on the deceleration pawl shaft.

[0019] The retraction pawl is kept in contact with the connecting piece by a retraction pawl spring;

[0020] The downshift lever is also provided with a return coil spring and a limiting pin for limiting the relative position with the upshift lever;

[0021] A retaining spring is fitted at the bottom of the retraction pawl shaft.

[0022] As a further aspect of the present invention: a release spring is provided at the bottom of the winding spool, one end of the release spring acting on the winding spool and the other end acting on the cross bracket.

[0023] As a further aspect of the present invention: in the initial state, the shift lever and the fixed bracket are tightly pressed together by the action of the reset coil spring;

[0024] The limiting pin on the downshift lever and the upshift lever are tightly abutted by a reset spring.

[0025] As a further aspect of the present invention, a flat washer is also provided on the top of the main shaft rivet.

[0026] The present invention also provides a shifter, including the above-described bicycle shifting control device.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] This invention is easy to manufacture and assemble, and has a simple speed-changing logic. It can shift gears one gear at a time or continuously. While similar products on the market typically have four ratchet pawls, this invention only has three, reducing the number of parts, lowering structural complexity, and simultaneously reducing manufacturing and assembly difficulties, as well as later maintenance difficulties. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 for Figure 1 A schematic diagram of the structure after the hidden hand transforms into the main body.

[0031] Figure 3 This is an exploded view of the present invention.

[0032] Figure 4 This is an exploded view of the invention after the main body of the hand-transformer has been concealed.

[0033] Figure 5 This is an exploded view of the gear shift lever assembly in this invention.

[0034] Figure 6 This is an exploded view of the deceleration lever assembly in this invention.

[0035] Figure 7 This is an initial state diagram of the present invention.

[0036] Figure 8 This is a cross-sectional view of the initial state of the present invention.

[0037] Figure 9 To complete the gear shift status diagram.

[0038] Figure 10 This is a status diagram showing the process of file withdrawal in progress.

[0039] Figure 11 This is a status diagram indicating that the file withdrawal process is about to be completed.

[0040] In the attached diagram: 1-Manual shifter main body, 2-Main shaft rivet, 3-Cross bracket, 4-Release coil spring, 5-Winding reel, 6-Pin shaft, 7-Forward / reverse limit pawl spring, 8-Forward / reverse limit pawl, 9-Ratchet, 10-Connecting piece, 11-Fixed bracket, 12-Reverse pawl, 13-Reverse shift lever, 14-Reset coil spring one, 15-Snap ring one, 16-Reverse pawl shaft, 17-Reverse pawl spring, 18-Limit pin, 19-Forward / reverse shift lever bushing, 20-Forward gear tooth, 21-Forward pawl, 22-Snap ring two, 23-Forward pawl spring, 24-Forward shift lever, 25-Reset coil spring two, 26-Flat washer, 27-Forward pawl shaft. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0042] Please see Figures 1-11 The present invention provides a bicycle gear shifting control device, comprising:

[0043] The main body of the hand-operated transformer 1, and the cross bracket 3 and the fixed bracket 11 fixed inside the main body of the hand-operated transformer 1;

[0044] Main spindle rivet 2, the main spindle rivet 2 is mounted on the cross bracket 3, and the main spindle rivet 2 is provided with a winding disc 5 and a connecting piece 10;

[0045] Ratchet 9, which is connected to the winding reel 5;

[0046] The advance tooth 20 is fixedly connected to the ratchet 9 and rotatably disposed within the fixed bracket 11;

[0047] A forward / reverse shift lever sleeve 19 is coaxially and rotatably fitted onto the main shaft rivet 2;

[0048] An advance shift lever assembly and an unshift shift lever assembly are sleeved on the advance / reverse shift lever bushing 19 and can rotate around it.

[0049] And a pin 6 is provided in the main body 1 of the manual shifter, and the pin 6 is provided with a gear shifting limit pawl spring 7 and a gear shifting limit pawl 8.

[0050] In a more specific example, the shift lever assembly includes a shift lever 24, a shift pawl shaft 27 mounted on the shift lever 24, and a shift pawl 21 rotatably sleeved on the shift pawl shaft 27.

[0051] The shift pawl 21 is kept in contact with the fixed bracket 11 by the shift pawl spring 23, and in the shifting state, the shift pawl 21 is kept in contact with the shift gear 20.

[0052] The shift lever 24 is also provided with a second return coil spring 25;

[0053] The connecting piece 10 is provided with a hole for the gear shift pawl shaft 27 to pass through, so that when the gear shift lever 24 rotates, it can drive the connecting piece 10 to rotate synchronously through the gear shift pawl shaft 27.

[0054] The bottom of the advance pawl shaft 27 is also fitted with a retaining spring 22.

[0055] In this embodiment, the shift pawl shaft 27 is installed to the corresponding position of the shift lever 24, and the head of the shaft is riveted to fix the two together; then the shift pawl spring 23 and the shift pawl 21 are passed through the shift pawl shaft 27 one after the other, and the shift pawl 21 can rotate on the shift pawl shaft 27; finally, the reset coil spring 25 is placed in the corresponding hole of the shift lever 24; at this point, the shift lever assembly is completed, and the assembly can rotate along the shift lever sleeve 19.

[0056] In a more specific example, the deceleration lever assembly includes a deceleration lever 13, a deceleration pawl shaft 16 mounted on the deceleration lever 13, and a deceleration pawl 12 rotatably sleeved on the deceleration pawl shaft 16.

[0057] The retraction pawl 12 is kept in contact with the connecting piece 10 by the retraction pawl spring 17;

[0058] The deceleration lever 13 is also provided with a reset coil spring 14 and a limiting pin 18 for limiting the relative position with the gear advance lever 24;

[0059] The bottom of the retraction pawl shaft 16 is fitted with a retaining spring 15.

[0060] In this embodiment, the deceleration pawl shaft 16 is installed into the corresponding hole of the deceleration lever 13, and the head of the shaft is riveted, thus binding the two together. Next, the limiting pin 18 is installed into the corresponding hole of the deceleration lever 13, and the tail of the pin is riveted, thus binding the two together. Then, the deceleration pawl spring 17 and the deceleration pawl 12 pass through the deceleration pawl shaft 16 one after the other, and then the retaining spring 15 is used to lock into the retaining groove of the deceleration pawl shaft 16, allowing the deceleration pawl 12 to rotate on the deceleration pawl shaft 16. Finally, the reset coil spring 14 is placed in the corresponding hole of the deceleration lever 13. At this point, the deceleration lever assembly is completed, and the assembly can rotate along the gear shift lever sleeve 19.

[0061] In a more specific example, the bottom of the winding reel 5 is provided with a release coil spring 4, one end of which acts on the winding reel 5 and the other end acts on the cross bracket 3.

[0062] In the initial state, the shift lever 24 and the fixed bracket 11 are pressed together by the action of the return spring 25;

[0063] The limiting pin 18 on the downshift lever 13 is in close contact with the upshift lever 24 through the action of the return spring 14;

[0064] A flat washer 26 is also provided on the top of the main shaft rivet 2.

[0065] In this embodiment, the ratchet 9 and the winding reel 5 are assembled together and radially fixed through at least two shaft holes; then the release spring 4 is installed at the bottom of the winding reel 5, and then the cross bracket 3 is placed at the bottom of the release spring 4. The pins of the inner ring of the spring are transmitted to the hole of the winding reel 5, and the hook at the outer end is hooked onto the cross bracket 3. The cross bracket 3 will be fixed to the main body 1 of the hand transformer later and cannot be moved; then the main shaft rivet 2 is used to pass through the cross bracket 3, the release spring 4, the winding reel 5, and the ratchet 9 at the same time; the ratchet 9 and the winding reel 5 can rotate simultaneously on the main shaft rivet 2;

[0066] The connecting piece 10 and the fixed bracket 11 are successively inserted into the top of the ratchet 9, and then the advance tooth 20 is inserted into the top of the ratchet 9. The ratchet 9 and the advance tooth 20 are assembled through the anti-fooling groove. The connecting piece 10 can rotate around the top of the ratchet 9. The fixed bracket 11 will be fixed to the main body 1 of the hand transformer. The ratchet 9 and the advance tooth 20 can rotate in the inner hole of the fixed bracket 11.

[0067] The shift lever assembly is passed through the main shaft rivet 2, and then the shift lever sleeve 19 is passed through the main shaft rivet 2. At the same time, the lower end of the sleeve passes through the rotating hole of the shift lever 13; the sleeve and the main shaft rivet 2 can rotate.

[0068] The gear shift lever assembly is passed through the main shaft rivet 2, and then the rotating hole sleeve of the gear shift lever 24 is inserted into the upper end of the gear shift lever bushing 19. At the same time, the gear shift pawl shaft 27 must pass through the corresponding hole of the connecting piece 10, and then the snap ring 22 is engaged in the slot of the gear shift pawl shaft 27. The gear shift lever 24 can rotate along the upper end of the bushing, and at the same time, the connecting piece 10 is rotated synchronously through the gear shift pawl shaft 27.

[0069] Fit the flat washer 26 onto the main shaft rivet 2, place it on the step at the top of the rivet, and then rivet the rivet tightly; the height of the rivet step must be greater than the sum of the heights of all parts on the rivet so that the parts can rotate; then hang each spring in the corresponding position to give it initial restoring torque;

[0070] The assembled components are fixed to the main body 1 of the manual shifter through the threaded holes on the fixed bracket 11. Then, the forward and reverse gear limit pawl spring 7 and the forward and reverse gear limit pawl 8 are also installed at the corresponding positions on the main body 1 of the manual shifter. The pin 6 is used to limit them, and the forward and reverse gear limit pawl 8 can rotate on the pin 6.

[0071] The transmission assembly is now complete.

[0072] This invention also provides a shifter, including the above-described bicycle shifting control device.

[0073] In summary, the working principle of this invention is as follows:

[0074] The initial state of the entire device before speed change:

[0075] The gear shift lever 24 and the fixed bracket 11 are pressed together by the second return spring 25; the limit pin 18 and the gear shift lever 24 are pressed together by the first return spring 14; the gear shift pawl 21 and the fixed bracket 11 are pressed together by the second return spring 25 and the gear shift pawl spring 23; the gear shift pawl 12 is pressed together with the connecting piece 10 by the gear shift pawl spring 17; the ratchet 9 and the connecting piece 10 are pressed together by the release spring 4; the gear shift limit pawl 8 and the ratchet 9 are pressed together by the gear shift limit pawl spring 7.

[0076] Shifting principle:

[0077] When the shift lever 24 is moved, the shift pawl 21, under the action of the shift pawl spring 23, instantly slides its pawl into the groove of the shift gear 20, causing the shift gear 20 to rotate. The shift gear 20 then causes the ratchet 9 to rotate. When the ratchet 9 rotates, it pushes away the shift limit pawl 8. However, under the action of the shift limit pawl spring 7, the shift limit pawl 8 can quickly engage with the ratchet 9, thus completing the shift. After the shift lever is released, the entire shift lever assembly returns to its initial state under the action of the return spring 25. This mechanism can shift gears one gear at a time or continuously.

[0078] In the engaged position, the entire disengagement lever assembly and the engaged lever 24 are relatively stationary. Because the limiting pin 18 on the disengagement lever 13 and the engaged lever 24 are pressed together by the return spring 14, the disengagement lever 13 and the engaged lever 24 are relatively stationary. The disengagement pawl 12, connected by the disengagement pawl shaft 16, also achieves relative stationarity with the engaged lever 24. Simultaneously, the connecting piece 10, connected by the engaged pawl shaft 27, achieves relative stationarity with the engaged lever 24, indirectly making the disengagement pawl 12 and the connecting piece 10 relatively stationary. However, when engaged, the disengagement pawl 12 rotates relative to the engaged / disengagement limiting pawl 8, and its tooth tips slide past the outside of the engaged / disengagement limiting pawl 8.

[0079] Unfurling principle:

[0080] When the de-shift lever 13 is moved, the de-shift pawl 12 rotates inward under the action of the de-shift pawl spring 17. Initially, the de-shift pawl 12 slides along the connecting piece 10. When the de-shift pawl 12 contacts the ratchet tooth 9, it separates from the connecting piece 10. Then, the de-shift pawl 12 contacts the gear shift limit pawl 8 and slowly pushes the gear shift limit pawl 8 away, causing the gear shift limit pawl 8 to separate from the ratchet tooth 9. Then, the de-shift pawl 12 replaces the gear shift limit pawl 8 and engages with the ratchet tooth 9. When the gear shift limit pawl 8 reaches the protrusion of the de-shift pawl 12, the action stops, and the gear shift limit pawl and the ratchet tooth 9 are completely separated.

[0081] At this time, the disengagement lever 13 is released. Under the action of the reset spring 14, the disengagement lever 13 rotates in the opposite direction, which simultaneously drives the disengagement pawl 12 to rotate back. Then, the ratchet 9 rotates in the opposite direction under the action of the release spring 4. At the beginning of the reverse rotation of the ratchet 9, the ratchet 9 and the disengagement pawl 12 are still engaged. The ratchet 9 and the disengagement pawl 12 will only separate when the disengagement pawl 12 contacts the connecting piece 10 and slides along it. At the same time, the gear shifting limit pawl 8 is no longer squeezed by the disengagement pawl 12. Under the action of the gear shifting limit pawl spring 7, it will move closer to the ratchet 9 until the gear shifting limit pawl 8 and the ratchet 9 are engaged. At this time, the disengagement is completed.

[0082] In this invention, unless otherwise explicitly specified and limited, the terms "sliding," "rotating," "fixed," and "equipped" should be interpreted broadly. For example, they can refer to welded connections, bolted connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bicycle gear shifting control device, comprising a shifter body (1) and a cross bracket (3) and a fixed bracket (11) fixed within the shifter body (1), characterized in that, Also includes: Main shaft rivet (2), the main shaft rivet (2) is mounted on the cross bracket (3), and the main shaft rivet (2) is provided with a winding disc (5) and a connecting piece (10); Ratchet (9), which is connected to the winding spool (5); The advance tooth (20) is fixedly connected to the ratchet (9) and rotatably disposed in the fixed bracket (11); A forward / reverse shift lever sleeve (19) is coaxially and rotatably fitted on the main shaft rivet (2); The gear shift lever assembly and the gear retraction lever assembly are sleeved on the gear shift lever sleeve (19) and can rotate around it; And a pin (6) is provided in the main body (1) of the manual shifter, and the pin (6) is provided with a gear shifting limit pawl spring (7) and a gear shifting limit pawl (8).

2. The bicycle gear shifting control device according to claim 1, characterized in that, The gear shift lever assembly includes a gear shift lever (24), a gear shift pawl shaft (27) mounted on the gear shift lever (24), and a gear shift pawl (21) rotatably sleeved on the gear shift pawl shaft (27); The gear shift pawl (21) is kept in contact with the fixed bracket (11) by the gear shift pawl spring (23), and in the gear shift state, the gear shift pawl (21) is kept in contact with the gear shift teeth (20); The shift lever (24) is also equipped with a reset coil spring (25).

3. The bicycle gear shifting control device according to claim 2, characterized in that, The connecting piece (10) is provided with a hole for the gear shift pawl shaft (27) to pass through, so that when the gear shift lever (24) rotates, it can drive the connecting piece (10) to rotate synchronously through the gear shift pawl shaft (27); The bottom of the advance pawl shaft (27) is also fitted with a retaining spring (22).

4. The bicycle gear shifting control device according to claim 1, characterized in that, The deceleration lever assembly includes a deceleration lever (13), a deceleration pawl shaft (16) mounted on the deceleration lever (13), and a deceleration pawl (12) rotatably sleeved on the deceleration pawl shaft (16); The retraction pawl (12) tends to maintain contact with the connecting piece (10) by the retraction pawl spring (17); The deceleration lever (13) is also provided with a reset coil spring (14) and a limiting pin (18) for limiting the relative position with the gear advance lever (24); A retaining spring (15) is fitted at the bottom of the retraction pawl shaft (16).

5. The bicycle gear shifting control device according to claim 1, characterized in that, The bottom of the winding reel (5) is provided with a release coil spring (4), one end of which acts on the winding reel (5) and the other end acts on the cross bracket (3).

6. The bicycle gear shifting control device according to claim 1, characterized in that, In the initial state, the shift lever (24) and the fixed bracket (11) are closely abutted by the return spring (25); The limiting pin (18) on the deceleration lever (13) and the gear advance lever (24) are closely connected by the action of the return spring (14).

7. The bicycle gear shifting control device according to claim 1, characterized in that, A flat washer (26) is also provided on the top of the main shaft rivet (2).

8. A hand-operated changer, characterized in that, Includes the bicycle gear shifting control device as described in any one of claims 1-7.

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