A split brake and drive mechanism for bicycle assembly

Abstract

The utility model discloses a separate brake and transmission mechanism for bicycle assembly, its structure includes the frame, the frame front end integral fixed link frame front fork, rear end integral fixed link frame rear fork, the one end installation front brake integrated assembly of frame front fork far from the frame, the one end installation rear brake integrated assembly of frame rear fork far from the frame, and the front brake integrated assembly includes the front disc brake mounting seat and the cylinder axle installation auxiliary ware of symmetrical setting in the inside both sides of frame front fork, and the transmission of both is installed with front hub, and the rear brake integrated assembly includes the transmission tower base and rear disc brake mounting seat of symmetrical setting in the inside both sides of frame rear fork, and the transmission of both is installed with rear hub, and the transmission tower base outside sets up the clamping freewheel, and this structure realizes the separate layout of brake and transmission, simplifies the overall structure and is convenient for separate dismounting maintenance, guarantees the braking and transmission cooperation of front wheel and rear wheel, improves the braking response speed and power transmission efficiency.

Description

Technical Field

[0001] This utility model relates to the field of bicycle technology, and in particular to a separate brake and transmission mechanism for bicycle assembly. Background Technology

[0002] As a convenient means of short-distance transportation, the braking and transmission systems of bicycles are core components that ensure riding safety and power transmission, directly affecting the riding experience and reliability. Currently, most bicycles on the market use an integrated design for their braking and transmission mechanisms. The braking and transmission components are closely linked in their installation structure. When a single component wears out or malfunctions, the entire integrated assembly must be disassembled for maintenance, which is cumbersome and inefficient. At the same time, the transmission between the traditional hub and the mounting bracket often relies on a key connection. Over time, the keyway is prone to slippage due to wear, affecting the stability of power transmission and failing to meet users' needs for convenient maintenance and transmission stability.

[0003] Therefore, those skilled in the art have provided a separate brake and transmission mechanism for bicycle assembly to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a separate brake and transmission mechanism for bicycle assembly.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A separate braking and transmission mechanism for bicycle assembly includes a frame, with a frame front fork integrally fixed to the front end of the frame and a frame rear fork integrally fixed to the rear end; a front brake integrated assembly is installed at the end of the frame front fork away from the frame, and a rear brake integrated assembly is installed at the end of the frame rear fork away from the frame.

[0007] The front brake integrated assembly includes a front disc brake mounting base and a thru-axle mounting auxiliary symmetrically arranged on both sides of the inside of the frame front fork, with a front hub connected between the two; a front brake pad is fixed to the outside of the front disc brake mounting base, and a front disc brake caliper that works with the front brake pad is detachably installed on the frame front fork.

[0008] The rear brake integrated assembly includes a drive tower base and a rear disc brake mount symmetrically arranged on both sides inside the rear fork of the frame, with a rear hub installed between them; a rear brake pad is fixed to the outside of the rear disc brake mount, and a rear disc brake caliper that works with the rear brake pad is detachably installed on the rear fork of the frame, and a cassette freewheel is sleeved on the outside of the drive tower base.

[0009] Preferably, the front wheel is mounted on the inside of the front fork of the frame, and the rear wheel is mounted on the inside of the rear fork of the frame; the front hub is connected to the front wheel through multiple spokes, and the rear hub is connected to the rear wheel through multiple spokes.

[0010] Preferably, both the front disc brake mount and the rear disc brake mount have integrally fixed flanges on their outer sides; the front disc brake mount is detachably connected to the front brake pad via a threaded rod through the flange, and the rear disc brake mount is detachably connected to the rear brake pad via a threaded rod through the flange.

[0011] Preferably, both the front disc brake caliper and the rear disc brake caliper are integrally fixed with a positioning mounting plate; the front disc brake caliper is detachably fixed to the front fork of the frame via a screw passing through the positioning mounting plate, and the rear disc brake caliper is detachably fixed to the rear fork of the frame via a screw passing through the positioning mounting plate.

[0012] Preferably, the front disc brake mounting bracket includes an outer front mounting housing, and a mounting spindle is rotatably mounted on the inner side of the front mounting housing via a bearing;

[0013] An auxiliary inner bushing is rotatably mounted on the inner side of the cylindrical shaft mounting auxiliary device via a bearing.

[0014] The front hub spindle is rotatably mounted on the inner side of the front hub via a bearing.

[0015] The mounting spindle, auxiliary inner bushing, and front hub spindle are all hollow structures with openings at both ends, and the three are coaxially arranged; the front brake universal thru-axle passes through the inner side of the three, and the two ends of the front brake universal thru-axle are respectively installed on both sides of the front fork of the frame;

[0016] Both the front disc brake mounting bracket and the thru-axle mounting auxiliary device have skeleton oil seals installed on the inner side of the port at the opposite end.

[0017] Preferably, the end of the mounting spindle away from the front hub extends to the outside of the front disc brake mounting seat and is integrally fixed with a threaded mounting shaft; a threaded hole adapted to the threaded mounting shaft is provided on one side of the frame front fork.

[0018] The outer wall of the end of the universal front brake cylinder shaft away from the threaded mounting shaft is provided with an external thread, and a duckbill nut is connected through the external thread.

[0019] The front brake universal thru-axle is integrally fixed with a front thru-axle abutment ring at one end near the threaded mounting shaft, and the front thru-axle abutment ring abuts against the outer side of the front fork of the frame.

[0020] The other side of the frame fork has a through hole for the universal front brake thru-axle to pass through, and the outer side of the through hole has a countersunk hole to accommodate the duckbill nut.

[0021] Preferably, the transmission tower base includes an outer tower base shell, and a tower base mandrel is rotatably mounted on the inner side of the tower base shell via bearings;

[0022] The rear disc brake mounting bracket includes an outer rear mounting housing, and a mounting bushing is rotatably mounted on the inner side of the rear mounting housing via a bearing.

[0023] The rear hub spindle is rotatably mounted on the inner side of the rear hub via a bearing.

[0024] The tower base spindle, mounting bushing, and rear hub spindle are all hollow structures with openings at both ends, and the three are coaxially arranged; a common rear brake cylinder shaft passes through the inner side of the three.

[0025] A skeleton oil seal is installed on the inner side of the port of the rear disc brake mounting bracket away from the rear hub.

[0026] Preferably, the end of the freehub mandrel away from the rear hub extends to the outside of the freehub housing and is integrally fixed with a freehub threaded shaft. An internal threaded positioning sleeve is fixed to one side of the rear fork of the frame by a screw, and the freehub threaded shaft is threaded to the inside of the internal threaded positioning sleeve.

[0027] The end of the mounting bushing away from the rear hub extends to the outside of the rear mounting housing and is integrally fixed with a threaded fixing shaft; the other side of the rear fork of the frame has a threaded hole adapted to the threaded fixing shaft.

[0028] The rear brake universal cylinder shaft has an external thread on one side and an internal thread on the inner side of the opening at one end of the tower base mandrel near the rear brake universal cylinder shaft, which is adapted to the external thread of the rear cylinder shaft.

[0029] The other end of the rear brake universal cylinder shaft is integrally fixed with a rear cylinder shaft abutment ring, which abuts against the outer side of the other side of the rear fork of the frame.

[0030] Preferably, the front disc brake mounting bracket and the front hub, the thru-axle mounting auxiliary device and the front hub, the drive tower base and the rear hub, and the rear disc brake mounting bracket and the rear hub are all connected by mortise and tenon joints.

[0031] The mortise and tenon structure consists of a tenon-type connecting protrusion and a mortise-type connecting groove.

[0032] The front disc brake mounting bracket and the thru-axle mounting aid are both integrally fixed with tenon-type connecting protrusions at the end near the front hub; both ends of the front hub are provided with mortise-type connecting grooves that are adapted to the tenon-type connecting protrusions.

[0033] The transmission tower base and the rear disc brake mounting bracket are both integrally fixed with tenon-type connecting protrusions at the end near the rear hub; both ends of the rear hub are provided with mortise-type connecting grooves that are adapted to the tenon-type connecting protrusions.

[0034] Preferably, a secondary drive ratchet is installed at one end of the base housing near the rear hub, and a tenon-type connecting protrusion on the drive base is integrally fixed to the outer end face of the secondary drive ratchet; a sealing ring is installed between the secondary drive ratchet and the outer wall of the base housing;

[0035] The inner side of the tower base shell is provided with a transmission spline groove along the annular surface, and a main transmission ratchet is movably arranged on the inner side of the tower base shell.

[0036] The outer peripheral surface of the main drive ratchet is integrally formed with spline teeth that mesh with the drive spline groove, and the end face of the main drive ratchet near the auxiliary drive ratchet is integrally formed with ratchet drive surface teeth.

[0037] The end face of the auxiliary drive ratchet near the main drive ratchet has a ratchet drive tooth groove that meshes with the ratchet drive surface teeth.

[0038] A ratchet washer is fixed to the inner wall of the tower base shell, and a ratchet spring is installed between the main drive ratchet and the ratchet washer.

[0039] Compared with the prior art, the beneficial effects of this utility model are:

[0040] This design breaks away from the traditional one-piece structure of bicycle wheelsets, breaking them down into independent components that are designed, processed, and assembled separately. This reduces the number of overall parts and simplifies the structural complexity of individual components, significantly lowering the difficulty of component processing and production costs. Simultaneously, the components are integrated using mortise and tenon joints and high-strength materials, ensuring that the combined structure possesses durability and performance comparable to traditional one-piece designs, balancing the flexibility of separate designs with the reliability of integrated components. Furthermore, considering the consumable nature of wheels, this design reduces repetitive operations and parts waste during wheel repair or replacement, lowering end-user maintenance costs. Ultimately, this reduces the total cost of manufacturing from production to use, improving the product's cost-effectiveness. Attached Figure Description

[0041] To illustrate the technical solutions in the embodiments of the present invention or the prior art more specifically and intuitively, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0042] Figure 1 This is a schematic diagram of the separate brake and transmission mechanism for bicycle assembly proposed in this utility model.

[0043] Figure 2 This is a schematic diagram of the installation structure of the front brake integrated component proposed in this utility model;

[0044] Figure 3 This is a schematic diagram of the frame front fork structure proposed in this utility model;

[0045] Figure 4This is a schematic diagram of the installation structure of the front disc brake mounting base and thru-axle mounting aid proposed in this utility model;

[0046] Figure 5 This is a schematic cross-sectional view of the front brake integrated component proposed in this utility model.

[0047] Figure 6 This is a schematic diagram of the installation structure of the rear brake integrated component proposed in this utility model;

[0048] Figure 7 This is a schematic diagram of the card-type flywheel mounting structure proposed in this utility model;

[0049] Figure 8 This is a schematic diagram of the transmission tower base installation structure proposed in this utility model;

[0050] Figure 9 This is a schematic cross-sectional view of the rear brake integrated component proposed in this utility model.

[0051] Figure 10 This is a schematic diagram of the installation structure of the internal thread positioning sleeve proposed in this utility model;

[0052] Figure 11 This is a schematic diagram of the cross-sectional structure of the transmission tower base proposed in this utility model.

[0053] In the diagram: 1. Frame; 2. Front fork; 3. Rear fork; 4. Front disc brake mount; 41. Front mount housing; 42. Mounting spindle; 421. Threaded mounting shaft; 5. Thruster mount auxiliary; 51. Auxiliary bushing; 6. Front hub; 61. Front hub spindle; 7. Front brake pad; 8. Front disc brake caliper; 9. Freehub; 91. Freehub housing; 92. Freehub spindle; 921. Freehub threaded shaft; 93. Secondary drive ratchet; 94. Ratchet washer; 95. Primary drive ratchet; 96. Ratchet spring; 10. Rear disc brake mount; 101. Rear... 102. Housing assembly; 102. Mounting bushing; 1021. Threaded fixing shaft; 11. Rear hub; 111. Rear hub spindle; 12. Rear brake pad; 13. Rear disc brake caliper; 14. Casing freewheel; 15. Flange; 16. Positioning mounting plate; 17. Front brake universal thru-axle; 171. Front thru-axle abutment ring; 172. Front thru-axle external thread; 18. Duckbill nut; 19. Countersunk hole; 20. Rear brake universal thru-axle; 201. Rear thru-axle abutment ring; 202. Rear thru-axle external thread; 21. Internal thread positioning sleeve; 22. Tenon-type connecting protrusion; 23. Mortise-type connecting groove. Detailed Implementation

[0054] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0055] Reference Figure 1-11 A separate brake and transmission mechanism for bicycle assembly includes a frame 1, a frame front fork 2 integrally fixed to the front end of the frame 1, and a frame rear fork 3 integrally fixed to the rear end of the frame 1; a front brake integrated assembly is installed at the end of the frame front fork 2 away from the frame 1, and a rear brake integrated assembly is installed at the end of the frame rear fork 3 away from the frame 1.

[0056] The front brake integrated assembly includes a front disc brake mount 4 and a thru-axle mounting auxiliary 5 symmetrically arranged on both sides of the inside of the frame fork 2, with a front hub 6 connected between them; a front brake pad 7 is fixed to the outside of the front disc brake mount 4, and a front disc brake caliper 8 that works with the front brake pad 7 can be detachably installed on the frame fork 2.

[0057] The rear brake integrated assembly includes a drive tower base 9 and a rear disc brake mount 10 symmetrically arranged on both sides inside the rear fork 3 of the frame, with a rear hub 11 installed between them; a rear brake pad 12 is fixedly connected to the outside of the rear disc brake mount 10; a rear disc brake caliper 13 that works with the rear brake pad 12 is detachably installed on the rear fork 3 of the frame; and a cassette freewheel 14 is sleeved on the outside of the drive tower base 9.

[0058] By adopting the above technical solution, the front fork 2 and the rear fork 3 of the frame are integrally fixed to the frame 1, and the "front brake integrated component" and "rear brake integrated component" are respectively set at the ends of the two, realizing the separation layout of braking and transmission functions for the first time. This avoids the problem of "one damage, all repairs" in the traditional integrated structure, and ensures the coordination of front wheel braking response and rear wheel power transmission through the symmetrical design of the front and rear components. The cassette flywheel 14 on the outside of the drive tower base 9 ensures the high efficiency of power transmission.

[0059] The front wheel is mounted on the inside of the front fork 2, and the rear wheel is mounted on the inside of the rear fork 3; the front hub 6 is connected to the front wheel through multiple spokes, and the rear hub 11 is connected to the rear wheel through multiple spokes.

[0060] Using the above technical solution, the front and rear wheels are respectively installed on the inner sides of the front fork 2 and the rear fork 3 of the frame, and the front hub 6 and the rear hub 11 are connected to the corresponding wheels through multiple spokes. This not only achieves stable power transmission from the hub to the wheel, but also improves the load-bearing capacity and rotational stability of the wheel through the force-distributing design of the multi-spokes, avoiding wheel wobbling due to uneven force during riding, and ensuring riding safety and comfort.

[0061] Both the front disc brake mount 4 and the rear disc brake mount 10 are integrally fixed to the outer side with flanges 15; the front disc brake mount 4 is detachably connected to the front brake pad 7 through the flange 15 with a threaded rod, and the rear disc brake mount 10 is detachably connected to the rear brake pad 12 through the flange 15 with a threaded rod.

[0062] By adopting the above technical solution, the flange 15, which is integrally fixed to the outer side of the front disc brake mounting bracket 4 and the rear disc brake mounting bracket 10, increases the contact area with the front brake pad 7 and the rear brake pad 12. Combined with the detachable connection method of the screw, it not only ensures the firmness of the brake pad installation, but also facilitates the quick replacement of the brake pads according to the wear condition. At the same time, the structural design of the flange 15 ensures that the braking force is evenly transmitted, avoids local stress concentration that may cause component damage, and extends the service life of the brake pads and mounting brackets.

[0063] Both the front disc brake caliper 8 and the rear disc brake caliper 13 are integrally fixed with a positioning mounting plate 16; the front disc brake caliper 8 is detachably fixed to the front fork 2 of the frame through a screw passing through the positioning mounting plate 16, and the rear disc brake caliper 13 is detachably fixed to the rear fork 3 of the frame through a screw passing through the positioning mounting plate 16.

[0064] By adopting the above technical solution, the positioning mounting plate 16, which is integrally fixed to the front disc brake caliper 8 and the rear disc brake caliper 13, provides a precise installation benchmark for the calipers, ensuring uniform clearance between the calipers and the corresponding brake pads 7 and 12, thus improving the consistency and reliability of braking. The detachable fixing method using screws through the positioning mounting plate 16 facilitates caliper position adjustment or maintenance, preventing caliper misalignment from affecting braking performance and ensuring the stability of braking operation during riding.

[0065] The front disc brake mounting bracket 4 includes an outer front mounting housing 41, and a mounting spindle 42 is rotatably mounted on the inner side of the front mounting housing 41 via a bearing;

[0066] An auxiliary inner bushing 51 is rotatably mounted on the inner side of the cylinder shaft mounting auxiliary device 5 via a bearing;

[0067] The front hub spindle 61 is rotatably mounted on the inner side of the front hub 6 via a bearing;

[0068] The mounting spindle 42, auxiliary inner bushing 51, and front hub spindle 61 are all hollow structures with openings at both ends, and the three are coaxially arranged; the front brake universal thru-shaft 17 is passed through the inner side of the three, and the two ends of the front brake universal thru-shaft 17 are respectively installed on both sides of the frame front fork 2.

[0069] Both the front disc brake mounting bracket 4 and the thru-axle mounting aid 5 have skeleton oil seals installed on the inner side of the port at the opposite end.

[0070] By adopting the above technical solutions, the front mounting housing 41 and mounting spindle 42 of the front disc brake mount 4, the auxiliary inner bushing 51 of the thru-axle mounting aid 5, and the front hub spindle 61 of the front hub 6 all adopt a hollow structure with openings at both ends, and the three are coaxially arranged. This not only reduces the overall weight of the components but also ensures coaxiality during rotation, reduces frictional resistance, and improves transmission efficiency. The universal front brake thru-axle 17, which passes through the inner side of all three, achieves integrated fixation of each component. The skeleton oil seals on the inner side of the ports of the front disc brake mount 4 and the thru-axle mounting aid 5 can effectively prevent dust and moisture from entering the interior of the components, avoid wear on precision structures such as bearings, and extend the service life of the components.

[0071] The end of the mounting spindle 42 away from the front hub 6 extends to the outside of the front disc brake mounting seat 4 and is integrally fixed with the threaded mounting shaft 421; a threaded hole adapted to the threaded mounting shaft 421 is opened on one side of the frame fork 2.

[0072] The outer wall of the end of the front brake universal cylinder shaft 17 away from the threaded mounting shaft 421 is provided with a front cylinder shaft external thread 172, and the duck tongue nut 18 is connected through the external thread.

[0073] The front brake universal thru-shaft 17 has a front thru-shaft abutment ring 171 integrally fixed to one end near the threaded mounting shaft 421, and the front thru-shaft abutment ring 171 abuts against the outer side of the front fork 2 of the frame.

[0074] The other side of the frame fork 2 has a through hole for the universal front brake thru-shaft 17 to pass through, and the outer side of the through hole has a countersunk hole 19 to accommodate the duckbill nut 18.

[0075] Using the above technical solution, the countersunk hole 19 on the other side of the frame fork 2 is fully compatible with the duckbill nut 18, allowing it to be fully accommodated and avoiding interference with the riding structure caused by exposed protrusions. During installation, the threaded mounting shaft 421 of the mounting spindle 42 is directly screwed into the threaded hole of the frame fork 2, and the front disc brake mounting bracket 4 can be pre-fixed without additional clamps. The front thru-shaft abutment 171 at one end of the front brake universal thru-shaft 17 automatically fits into the outer side of the frame fork 2, quickly determining the installation depth without repeated adjustments. During disassembly, the front brake universal thru-shaft 17 is unscrewed from the duckbill nut 18 using conventional tools, allowing the universal thru-shaft to be pulled out from the countersunk hole 19 side. The front wheel assembly can then be directly disassembled using a tenon-and-mortise release method. Finally, the front disc brake mounting bracket 4 can be unscrewed to complete the disassembly. The steps are simple and there is no risk of parts getting stuck, making it suitable for daily maintenance and parts replacement scenarios.

[0076] The transmission tower base 9 includes an outer tower base shell 91, and a tower base spindle 92 is rotatably mounted on the inner side of the tower base shell 91 via a bearing;

[0077] The rear disc brake mounting bracket 10 includes an outer rear mounting housing 101, and a mounting bushing 102 is rotatably mounted on the inner side of the rear mounting housing 101 via a bearing.

[0078] The rear hub spindle 111 is rotatably mounted on the inner side of the rear hub 11 via a bearing;

[0079] The base spindle 92, mounting bushing 102, and rear hub spindle 111 are all hollow structures with openings at both ends, and the three are coaxially arranged; the rear brake universal cylinder shaft 20 is inserted through the inner side of the three.

[0080] A skeleton oil seal is installed on the inner side of the port of the rear disc brake mounting bracket 10 away from the rear hub 11.

[0081] By adopting the above technical solution, and in accordance with the structure of the front brake assembly, the freehub spindle 92 of the drive freehub 9, the mounting bushing 102 of the rear disc brake mount 10, and the rear hub spindle 111 of the rear hub 11 are designed as hollow coaxial structures, and a universal rear brake cylinder shaft 20 is inserted through them: the hollow design reduces the weight of the rear wheel assembly, and the coaxial structure ensures that the power of the drive freehub 9 can be transmitted to the rear hub 11 in a straight line, avoiding power loss; the skeleton oil seal at the port of the rear disc brake mount 10 is specially designed to protect the mud and sand near the rear wheel, ensuring the smooth rotation of the rear hub spindle 111 and the mounting bushing 102.

[0082] One end of the freehub spindle 92, away from the rear hub 11, extends to the outside of the freehub housing 91 and is integrally fixed with the freehub threaded shaft 921. The rear fork 3 of the frame is fixed with an internal threaded positioning sleeve 21 by a screw, and the freehub threaded shaft 921 is threaded to the inside of the internal threaded positioning sleeve 21.

[0083] The end of the mounting bushing 102 away from the rear hub 11 extends to the outside of the rear mounting housing 101 and is integrally fixed with the threaded fixing shaft 1021; the other side of the frame rear fork 3 has a threaded hole adapted to the threaded fixing shaft 1021.

[0084] The rear brake universal cylinder shaft 20 has an external thread 202 on one side and the tower base mandrel 92 has an internal thread that matches the external thread 202 on the inner side of the opening at one end of the rear brake universal cylinder shaft 20.

[0085] The other end of the rear brake universal thru-axle 20 is integrally fixed with a rear thru-axle abutment ring 201, which abuts against the outer side of the other side of the rear fork 3 of the frame.

[0086] By adopting the above technical solution, through a multi-layered collaborative structure of "double-sided threaded pre-fixation + rear brake universal cylinder shaft through-locking", a stable installation foundation is provided for the rear brake integrated component, while also meeting its core requirement of bearing the torque transmitted by power: the freehub base mandrel 92 extends to the freehub base threaded shaft 921, which is threadedly connected to the internal threaded positioning sleeve 21 on one side of the rear fork 3 of the frame, and the mounting bushing 102 extends to the threaded fixing shaft 1021, which is adapted to the threaded hole on the other side of the rear fork 3 of the frame and screwed in, forming a symmetrical pre-fixation of the rear component from both sides, effectively dispersing the radial stress during power transmission and avoiding unilateral force. This causes component misalignment; one end of the rear brake universal thru-axle 20 precisely engages with the internal thread of the freehub spindle 92 through the external thread 202 of the rear thru-axle, while the other end of the rear thru-axle abutment ring 201 tightly abuts against the outer side of the other side of the rear fork 3 of the frame. It integrates the various components of the rear assembly through the through-type design, ensures the coaxiality of rotation to reduce friction loss, and prevents the universal thru-axle from moving axially by means of "threaded locking + end face limit". Even if you encounter instantaneous torque during rapid acceleration or braking while riding, it can prevent the rear assembly from loosening. At the same time, all threaded connection structures are easy to disassemble and maintain later, and can be adapted to the needs of component replacement.

[0087] The front disc brake mounting base 4 and the front hub 6, the thru-axle mounting auxiliary device 5 and the front hub 6, the drive tower base 9 and the rear hub 11, and the rear disc brake mounting base 10 and the rear hub 11 are all connected by mortise and tenon joints.

[0088] The mortise and tenon structure consists of a tenon-type connecting protrusion 22 and a mortise-type connecting groove 23;

[0089] The front disc brake mounting bracket 4 and the thru-axle mounting aid 5 are both integrally fixed with the tenon-type connecting protrusion 22 at one end near the front hub 6; both ends of the front hub 6 are provided with mortise-type connecting grooves 23 that are adapted to the tenon-type connecting protrusion 22.

[0090] The transmission tower base 9 and the rear disc brake mounting bracket 10 are both integrally fixed with tenon-type connecting protrusions 22 at one end near the rear hub 11; both ends of the rear hub 11 are provided with mortise-type connecting grooves 23 that are adapted to the tenon-type connecting protrusions 22.

[0091] The above technical solution innovatively adopts a mortise and tenon structure of "tenon-type connecting protrusion 22 + mortise-type connecting groove 23" to achieve the transmission connection of the front disc brake mounting base 4, the thru-axle mounting auxiliary device 5 and the front hub 6, as well as the transmission base 9, the rear disc brake mounting base 10 and the rear hub 11 with the Mohs angle.

[0092] This structure precisely eliminates transmission gaps through beveled contact, and the multi-directional contact surface can synchronously and stably transmit torque. Compared with traditional key connections, it has a larger contact area, and there will be no slippage problem caused by "keyway wear" during transmission. In addition, the tenon and mortise with Morse bevel angle fit do not require additional fasteners. During disassembly and assembly, it can be simply inserted and pulled along the axial direction, which greatly improves power transmission efficiency and simplifies assembly steps.

[0093] In addition, the mortise and tenon structure can be designed in various forms such as squares and polygons according to requirements. This embodiment adopts a triangular structure, which is compatible with different torque transmission scenarios and has both structural versatility and transmission reliability.

[0094] A secondary drive ratchet 93 is installed at one end of the base housing 91 near the rear hub 11. The tenon-type connecting protrusion 22 on the drive base 9 is integrally fixed to the outer end face of the secondary drive ratchet 93. The structure of the secondary drive ratchet 93 is shown in the attached figure, and a similar folded edge structure is provided on its outer periphery. A sealing ring is installed between the folded edge and the outer wall of the base housing 91.

[0095] A transmission spline groove is provided along the annular surface on the inner side of the tower base shell 91, and a main transmission ratchet 95 is movably arranged on the inner side of the tower base shell 91.

[0096] The outer peripheral surface of the main drive ratchet 95 is integrally formed with spline teeth that mesh with the drive spline groove, and the end face of the main drive ratchet 95 near the auxiliary drive ratchet 93 is integrally formed with ratchet drive surface teeth.

[0097] The end face of the auxiliary drive ratchet 93, which is close to the main drive ratchet 95, has a ratchet drive tooth groove that meshes with the ratchet drive surface teeth.

[0098] A ratchet washer 94 is fixed to the inner wall of the tower base shell 91, and a ratchet spring 96 is installed between the main drive ratchet 95 and the ratchet washer 94.

[0099] Using the above technical solution, the ratchet mechanism inside the transmission base 9, consisting of a secondary drive ratchet 93, a main drive ratchet 95, a ratchet spring 96, a ratchet washer 94, and the base housing 91, can achieve unidirectional power transmission and disengagement during gliding: When riding, the base housing 91 drives the main drive ratchet 95 to rotate, and the ratchet spring 96 pre-tightens to push the main drive ratchet 95 to engage with the secondary drive ratchet 93, and the power is transmitted to the rear hub 11 through the secondary drive ratchet 93; when gliding, the secondary drive ratchet 93 pushes the main drive ratchet 95 in the opposite direction, forcing the ratchet spring 96 to passively contract, and the main and secondary ratchets disengage, preventing the pedals from moving. At the same time, the ratchet washer 94 supports the spring contraction, and the sealing ring prevents impurities from entering, ensuring the stability and durability of the mechanism.

[0100] The drive base 9 is connected to the cassette flywheel 14 via a keyed structure on the outside of the base housing 91. The base itself is mainly responsible for power input and transmission. Its external structure can be designed to match the needs of different types of flywheels to be compatible with various cassette flywheels such as MS, HG, and XDR / XD. The internal structure maintains the stable transmission design described above. By simply replacing the base housing 91 with different shell shapes, it is possible to adapt to different types of flywheels, which not only ensures the high efficiency of power transmission but also expands the versatility of the transmission system and meets diverse flywheel selection needs.

[0101] Working principle:

[0102] The working principle of the separate brake and transmission mechanism is as follows: When riding, the cassette freewheel 14 drives the main transmission ratchet 95 and the auxiliary transmission ratchet 93 in the transmission base 9 to mesh. The power is transmitted to the rear hub 11 through the tenon structure, and then drives the rear wheel to rotate through the spokes. The front wheel rotates synchronously with the spokes through the front hub 6 as you ride. When braking, the front disc brake caliper 8 and the rear disc brake caliper 13 clamp and rub against the corresponding front brake pad 7 and rear brake pad 12 to achieve deceleration. The front and rear brake integrated components are firmly installed on the front fork 2 and the rear fork 3 of the frame through the universal spool shafts 17 and 20 and the threaded connection structure. When gliding, the ratchet mechanism disengages to prevent the pedals from moving. The frame oil seal protects the internal components from the corrosion of impurities and ensures the stable coordination of transmission and braking.

[0103] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A separate brake and transmission mechanism for bicycle assembly, comprising a frame (1), characterized in that, The frame (1) is integrally fixed to the front fork (2) at the front end and integrally fixed to the rear fork (3) at the rear end; the front fork (2) is equipped with a front brake integrated assembly at the end away from the frame (1) and the rear fork (3) is equipped with a rear brake integrated assembly at the end away from the frame (1). The front brake integrated assembly includes a front disc brake mounting base (4) and a thru-axle mounting auxiliary device (5) symmetrically arranged on both sides inside the front fork (2) of the frame, with a front hub (6) installed between them; a front brake pad (7) is fixedly connected to the outside of the front disc brake mounting base (4), and a front disc brake caliper (8) that works with the front brake pad (7) can be detachably installed on the front fork (2) of the frame; The rear brake integrated assembly includes a drive tower base (9) and a rear disc brake mount (10) symmetrically arranged on both sides inside the rear fork (3) of the frame, with a rear hub (11) installed between them; a rear brake pad (12) is fixedly connected to the outside of the rear disc brake mount (10), and a rear disc brake caliper (13) that works with the rear brake pad (12) is detachably installed on the rear fork (3) of the frame, and a cassette freewheel (14) is sleeved on the outside of the drive tower base (9).

2. A separate brake and transmission mechanism for bicycle assembly according to claim 1, characterized in that, The front wheel is mounted on the inside of the front fork (2) of the frame, and the rear wheel is mounted on the inside of the rear fork (3) of the frame; the front hub (6) is connected to the front wheel through multiple spokes, and the rear hub (11) is connected to the rear wheel through multiple spokes.

3. A separate brake and transmission mechanism for bicycle assembly according to claim 1, characterized in that, Both the front disc brake mounting base (4) and the rear disc brake mounting base (10) are integrally fixed with flanges (15) on their outer sides; the front disc brake mounting base (4) is detachably connected to the front brake pad (7) by a screw through the flange (15), and the rear disc brake mounting base (10) is detachably connected to the rear brake pad (12) by a screw through the flange (15).

4. A separate brake and transmission mechanism for bicycle assembly according to claim 1, characterized in that, Both the front disc brake caliper (8) and the rear disc brake caliper (13) are integrally fixed with a positioning mounting plate (16); the front disc brake caliper (8) is detachably fixed to the front fork (2) of the frame through a screw through the positioning mounting plate (16), and the rear disc brake caliper (13) is detachably fixed to the rear fork (3) of the frame through a screw through the positioning mounting plate (16).

5. A separate brake and transmission mechanism for bicycle assembly according to claim 1, characterized in that, The front disc brake mounting bracket (4) includes an outer front mounting housing (41), and a mounting spindle (42) is rotatably mounted on the inner side of the front mounting housing (41) via a bearing; The inner side of the cylindrical shaft mounting auxiliary device (5) is rotatably mounted with an auxiliary inner bushing (51) via a bearing; The front hub (6) has a front hub spindle (61) rotatably mounted on its inner side via a bearing; The mounting spindle (42), auxiliary inner bushing (51), and front hub spindle (61) are all hollow structures with openings at both ends, and are coaxially arranged; the front brake universal cylinder shaft (17) is inserted through the inner side of the three, and the two ends of the front brake universal cylinder shaft (17) are respectively installed on both sides of the frame front fork (2); Both the front disc brake mounting base (4) and the throttle shaft mounting auxiliary device (5) have skeleton oil seals installed on the inner side of the port at the opposite end.

6. A separate brake and transmission mechanism for bicycle assembly according to claim 5, characterized in that, The mounting spindle (42) extends from the front hub (6) to the outside of the front disc brake mounting seat (4) and is integrally fixed with a threaded mounting shaft (421); the frame fork (2) has a threaded hole on one side that is compatible with the threaded mounting shaft (421); The outer wall of the end of the front brake universal cylinder shaft (17) away from the threaded mounting shaft (421) is provided with a front cylinder external thread (172), and the duck tongue nut (18) is connected through the external thread; The front brake universal thru-axle (17) is integrally fixed with a front thru-axle abutment (171) at one end near the threaded mounting shaft (421), and the front thru-axle abutment (171) abuts against the outer side of the frame front fork (2). The frame fork (2) has a through hole on the other side for the universal front brake thru-shaft (17) to pass through, and a countersunk hole (19) for accommodating the duckbill nut (18) is provided on the outer side of the through hole.

7. A separate brake and transmission mechanism for bicycle assembly according to claim 1, characterized in that, The transmission tower base (9) includes an outer tower base shell (91), and a tower base spindle (92) is rotatably mounted on the inner side of the tower base shell (91) via a bearing; The rear disc brake mounting bracket (10) includes an outer rear mounting housing (101), and a mounting bushing (102) is rotatably mounted on the inner side of the rear mounting housing (101) via a bearing; The rear hub (11) has a rear hub spindle (111) rotatably mounted on its inner side via a bearing; The tower base spindle (92), mounting bushing (102), and rear hub spindle (111) are all hollow structures with openings at both ends, and the three are coaxially arranged; the rear brake universal cylinder shaft (20) is inserted through the inner side of the three. A skeleton oil seal is installed on the inner side of the port at the end of the rear disc brake mounting bracket (10) away from the rear hub (11).

8. A separate brake and transmission mechanism for bicycle assembly according to claim 7, characterized in that, The end of the freehub spindle (92) away from the rear hub (11) extends to the outside of the freehub housing (91) and is integrally fixed with the freehub threaded shaft (921). The rear fork (3) of the frame is fixed with an internal threaded positioning sleeve (21) by a screw. The freehub threaded shaft (921) is threaded to the inside of the internal threaded positioning sleeve (21). The mounting bushing (102) extends to the outside of the rear mounting housing (101) at one end away from the rear hub (11), and is integrally fixed with a threaded fixing shaft (1021); the other side of the frame rear fork (3) is provided with a threaded hole that is compatible with the threaded fixing shaft (1021); The rear brake universal cylinder shaft (20) has an external thread (202) on one side and the tower base mandrel (92) has an internal thread that matches the external thread (202) on the inner side of the opening at one end of the rear brake universal cylinder shaft (20). The other end of the rear brake universal cylinder shaft (20) is integrally fixed with a rear cylinder shaft abutment ring (201), which abuts against the outer side of the other side of the rear fork (3) of the frame.

9. A separate brake and transmission mechanism for bicycle assembly according to claim 7, characterized in that, The front disc brake mounting base (4) and the front hub (6), the throttle shaft mounting auxiliary device (5) and the front hub (6), the transmission base (9) and the rear hub (11), and the rear disc brake mounting base (10) and the rear hub (11) are all connected by mortise and tenon joints. The mortise and tenon structure consists of a tenon-type connecting protrusion (22) and a mortise-type connecting groove (23); The front disc brake mounting base (4) and the thru-axle mounting aid (5) are both integrally fixed with the tenon-type connecting protrusion (22) at the end near the front hub (6); both ends of the front hub (6) are provided with mortise-type connecting grooves (23) that are adapted to the tenon-type connecting protrusion (22). The transmission tower base (9) and the rear disc brake mounting base (10) are both integrally fixed with tenon-type connecting protrusions (22) at the end near the rear hub (11); both ends of the rear hub (11) are provided with mortise-type connecting grooves (23) that are adapted to the tenon-type connecting protrusions (22).

10. A separate brake and transmission mechanism for bicycle assembly according to claim 9, characterized in that, A secondary drive ratchet (93) is installed at one end of the base shell (91) near the rear hub (11). The tenon-type connecting protrusion (22) on the transmission base (9) is integrally fixed to the outer end face of the secondary drive ratchet (93). A sealing ring is installed between the secondary drive ratchet (93) and the outer wall of the base shell (91). The inner side of the tower base shell (91) is provided with a transmission spline groove along the annular surface, and the inner side of the tower base shell (91) is provided with a main transmission ratchet (95); The outer peripheral surface of the main drive ratchet (95) is integrally formed with spline teeth that mesh with the drive spline groove, and the end face of the main drive ratchet (95) near the auxiliary drive ratchet (93) is integrally formed with ratchet drive surface teeth. The auxiliary drive ratchet (93) has a ratchet drive tooth groove on one end face near the main drive ratchet (95) that meshes with the ratchet drive surface teeth. A ratchet washer (94) is fixed to the inner wall of the tower base shell (91), and a ratchet spring (96) is installed between the main drive ratchet (95) and the ratchet washer (94).

Images