A precise gear shifting mechanism for a wire-controlled rear-mounted bicycle

Abstract

The utility model discloses a kind of wire control rear-mounted bicycle precision gear shifting mechanism, it is related to bicycle gear shifting mechanism technical field;Including gear box, the side fixed mounting of gear box bottom end has support, the bottom end fixed mounting of support has sleeve, the inside of support is rotatably connected with shaft near the side of sleeve, the surface of shaft is equipped with adjusting assembly, the inside of support is equipped with blowing assembly, the opposite two sides of support inside are all set with sliding slot;When steel wire rope is contracted, driven wheel is rotatable with half-face gear by being set, under the action of toothed plate and half-face gear, connecting frame slides along sliding slot, so that piston rod slides towards the inner cavity of piston tube, gas is extruded into air outlet tube inside and blown to steel wire rope surface, so that water drop on the surface of steel wire rope is blown off, avoid water drop into sleeve inside and corrode steel wire rope.

Description

Technical Field

[0001] This utility model relates to the technical field of bicycle gear shifting mechanisms, specifically a wire-controlled rear-mounted precision gear shifting mechanism for bicycles. Background Technology

[0002] The derailleur of a variable-speed bicycle is pivotally connected to a part of the bicycle via a fixed mount. The derailleur is suspended and supported by the fixed mount. When the shift cable is pulled, it is connected to a displacement component, which causes the chain guide mechanism to move laterally, thereby causing the chain to change different sizes of sprockets on a sprocket set to achieve the shifting function.

[0003] When riding in rainy weather, rainwater splashes onto the surface of the wire rope. When shifting gears, the wire rope tightens and contracts towards the inside of the sleeve, causing rainwater to enter the sleeve. Over time, the rainwater adhering to the inside of the sleeve will corrode the rubber pads on the inner wall of the sleeve, and the wire rope will also rust and eventually break. To address these issues, a wire-controlled rear-mounted precision shifting mechanism for bicycles is proposed. Utility Model Content

[0004] In order to solve the above problems, the purpose of this utility model is to provide a wire-controlled rear-mounted bicycle precision shifting mechanism.

[0005] To solve the above technical problems, the present invention adopts the following technical solution: a wire-controlled rear-mounted bicycle precision gear shifting mechanism, including a gearbox, a bracket fixedly installed on one side of the bottom end of the gearbox, a sleeve fixedly installed on the bottom end of the bracket, a rotating shaft rotatably connected inside the bracket near the sleeve, an adjustment component on the surface of the rotating shaft, a blower component inside the bracket, and sliding grooves on opposite sides inside the bracket.

[0006] The blower assembly includes a slider slidably connected inside a slide groove. A connecting frame is fixedly installed on one side of the slider. The connecting frame slides inside the slide groove via an adjusting component. Air outlets are fixedly installed on opposite sides inside the support. Piston tubes are symmetrically fixedly installed at the top of the air outlets. A piston rod is slidably connected to one side of the inner cavity of the piston tube. One side of the piston rod is connected to the connecting frame.

[0007] Preferably, the adjustment assembly includes two half-gears symmetrically fixedly mounted on the surface of the rotating shaft, a through groove is provided at the center of the bottom end of the bracket, a driven wheel passing through the through groove is fixedly mounted at the center of the surface of the rotating shaft, a toothed plate is fixedly mounted on one side of the bottom end of the connecting frame, and the two half-gears are staggered on the surface of the rotating shaft.

[0008] Preferably, a spring assembly is fixedly installed on the other side of the connecting frame, and the other end of the spring assembly is connected to the inner wall of the bracket.

[0009] Preferably, an air inlet pipe that penetrates the support is fixedly installed on the surface of the air outlet duct, and both the air inlet pipe and the air outlet duct are equipped with a one-way valve.

[0010] Preferably, a rubber pad is fixedly installed on the inner surface of the sleeve.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] When the wire rope contracts, the driven wheel, along with the half-gear, rotates. Under the action of the toothed plate and the half-gear, the connecting frame slides along the slide groove, causing the piston rod to slide towards the inner cavity of the piston tube. This forces the gas into the air outlet and blows it onto the surface of the wire rope, thus blowing off the water droplets on the surface of the wire rope and preventing water droplets from entering the casing and corroding the wire rope. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Fig. 1 This is a schematic diagram of the structure of this utility model;

[0015] Fig. 2 This is a schematic diagram of the internal structure of the bracket in this utility model;

[0016] Fig. 3 This is a partial structural cross-sectional view of the bracket in this utility model.

[0017] In the diagram: 1. Gearbox; 2. Bracket; 3. Sleeve; 4. Shaft; 5. Half-face gear; 6. Driven wheel; 7. Spring assembly; 8. Slider; 9. Slide groove; 10. Connecting frame; 13. Piston rod; 14. Piston tube; 15. Air outlet; 16. Air inlet. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example: Figs. 1-3As shown, this utility model provides a wire-controlled rear-mounted bicycle precision gear shifting mechanism, including a gearbox 1, a bracket 2 fixedly installed on one side of the bottom end of the gearbox 1, a sleeve 3 fixedly installed on the bottom end of the bracket 2, a steel wire rope passing through the inside of the sleeve 3, a rotating shaft 4 rotatably connected to the side of the bracket 2 near the sleeve 3, an adjustment component provided on the surface of the rotating shaft 4, the rotating shaft 4 rotates through the adjustment component when the steel wire rope passes through the inside of the sleeve 3, a blower component is provided inside the bracket 2, and grooves 9 are provided on opposite sides inside the bracket 2;

[0020] The blowing assembly includes a slider 8 slidably connected inside the slide groove 9. A connecting frame 10 is fixedly installed on one side of the slider 8. The connecting frame 10 slides inside the slide groove 9 via an adjusting component. Air outlets 15 are fixedly installed on opposite sides inside the bracket 2. Piston tubes 14 are symmetrically fixedly installed at the top of the air outlets 15. A piston rod 13 is slidably connected to one side of the inner cavity of the piston tube 14. When the connecting frame 10 slides along the slide groove 9, the piston rod 13 slides toward the inner cavity of the piston tube 14, transmitting the gas inside the piston tube 14 to the inside of the air outlet 15 and blowing it toward the surface of the wire rope. One side of the piston rod 13 is connected to the connecting frame 10. An air inlet pipe 16 penetrating the bracket 2 is fixedly installed on the surface of the air outlet 15. Both the air inlet pipe 16 and the air outlet 15 are equipped with one-way valves. When the connecting frame 10 returns to its original position and slides, the piston rod 13 is pulled in the inner cavity of the piston tube 14, drawing in external gas through the air inlet pipe 16 into the inside of the piston tube 14 for storage.

[0021] The adjustment assembly includes two half-gears 5 symmetrically fixedly mounted on the surface of the rotating shaft 4. A through groove is provided at the center of the bottom end of the bracket 2. A driven wheel 6 passing through the through groove is fixedly mounted at the center of the surface of the rotating shaft 4. A toothed plate is fixedly mounted on one side of the bottom end of the connecting frame 10. The two half-gears 5 are distributed in an alternating manner on the surface of the rotating shaft 4. A spring assembly 7 is fixedly mounted on the other side of the connecting frame 10. The other end of the spring assembly 7 is connected to the inner wall of the bracket 2.

[0022] By adopting the above technical solution, the driven wheel 6 is engaged with the surface of the wire rope. When the wire rope moves, the driven wheel 6 rotates, which causes the shaft 4 to rotate with two half-gears 5 and interact with the toothed plate at the bottom of the connecting frame 10, so that the connecting frame 10 slides along the slide groove 9. It is worth noting that during the sliding process of the connecting frame 10, the spring assembly 7 is stretched and thus has tension.

[0023] A rubber pad is fixedly installed on the inner surface of sleeve 3.

[0024] By adopting the above technical solution, the rubber pads reduce the friction of the wire rope and increase its service life.

[0025] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A precision gear shifting mechanism for a rear-mounted wire-controlled bicycle, comprising a gearbox (1), wherein a bracket (2) is fixedly mounted on one side of the bottom end of the gearbox (1), and a sleeve (3) is fixedly mounted on the bottom end of the bracket (2), characterized in that: The bracket (2) has a rotating shaft (4) rotatably connected to the side of the sleeve (3) inside. The surface of the rotating shaft (4) is provided with an adjustment component. The bracket (2) has a blowing component inside. Slide grooves (9) are opened on opposite sides inside the bracket (2). The blower assembly includes a slider (8) slidably connected inside the slide groove (9). A connecting frame (10) is fixedly installed on one side of the slider (8). The connecting frame (10) slides inside the slide groove (9) via an adjustment assembly. Air outlets (15) are fixedly installed on opposite sides inside the bracket (2). Piston tubes (14) are symmetrically fixedly installed at the top of the air outlets (15). A piston rod (13) is slidably connected to one side of the inner cavity of the piston tube (14). One side of the piston rod (13) is connected to the connecting frame (10).

2. The precision shifting mechanism for a rear-mounted, wire-controlled bicycle as described in claim 1, characterized in that, The adjustment assembly includes a half-face gear (5) symmetrically fixedly installed on the surface of the rotating shaft (4). A through groove is provided at the center of the bottom end of the bracket (2). A driven wheel (6) passing through the through groove is fixedly installed at the center of the surface of the rotating shaft (4). A toothed plate is fixedly installed on one side of the bottom end of the connecting frame (10). The two half-face gears (5) are staggered on the surface of the rotating shaft (4).

3. The precision shifting mechanism for a rear-mounted, wire-controlled bicycle as described in claim 2, characterized in that, A spring assembly (7) is fixedly installed on the other side of the connecting frame (10), and the other end of the spring assembly (7) is connected to the inner wall of the bracket (2).

4. The precision shifting mechanism for a rear-mounted, wire-controlled bicycle as described in claim 2, characterized in that, An air inlet pipe (16) that passes through the bracket (2) is fixedly installed on the surface of the air outlet pipe (15). Both the air inlet pipe (16) and the air outlet pipe (15) are equipped with one-way valves.

5. A wire-controlled rear-mounted precision shifting mechanism for bicycles as described in claim 1, characterized in that, A rubber pad is fixedly installed on the inner surface of the sleeve (3).

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