A quick connector assembly

Abstract

This utility model discloses a quick connector assembly, including a left connector assembly and a right connector assembly. The left connector assembly includes a left spring and a left valve core, and the right connector assembly includes a right connector body. The right connector body is provided with a right spring, a right valve core, and a floating piston. The right spring can push the floating piston to the left, causing the right valve core to block the floating piston. The right end of the left connector assembly is provided with a plug-in part, and the outer wall of the plug-in part is provided with a protrusion. The right connector body is provided with a waist hole, and a locking groove is provided on the left side of one end of the waist hole. The other end of the waist hole is provided with a plug-in groove leading to the left end of the right connector body. This utility model utilizes the cooperation structure of the protrusion, waist hole, and locking groove, combined with the elastic return characteristics of the left and right springs, to replace the traditional threaded connection, realize quick plugging and locking, significantly shorten the disassembly and assembly time, and improve the ease of use of folding bicycles.

Description

Technical Field

[0001] This utility model relates to the field of bicycle technology, specifically to a quick-connect assembly. Background Technology

[0002] Currently, bicycle brake systems are mainly divided into cable-operated disc brakes and hydraulic disc brakes. Hydraulic disc brakes require a connector assembly. Each end of the connector assembly is connected to a hydraulic hose; one hose connects to the brake lever, and the other connects to the brake caliper. The brake lever contains a hydraulic master cylinder. When the rider squeezes the brake lever, it pushes the piston in the master cylinder, pressurizing the brake fluid. This pressure is transmitted to the brake caliper through the hose connected to the connector assembly. Under the hydraulic pressure, the piston in the brake caliper pushes the brake pads to clamp the brake disc, thus achieving braking.

[0003] Folding bicycles have two states: folded for storage and unfolded for riding. Folding bicycles using hydraulic disc brakes typically have a detachable connector assembly. When folding, the assembly needs to be separated into two parts: one part connects to the brake lever via a hydraulic line, and the other part connects to the brake caliper via another hydraulic line. Existing detachable connector assemblies usually have these two detachable parts connected by a threaded structure, requiring multiple turns to separate or reconnect, making disassembly and assembly inconvenient. Furthermore, disassembly and assembly can easily lead to hydraulic fluid leakage. Hydraulic fluid leakage not only severely affects the braking performance of the folding bicycle, but also causes pollution, corrodes the coatings on the bicycle frame and other components, accelerates oxidation and rust of metal parts, and shortens the vehicle's lifespan. Utility Model Content

[0004] The purpose of this invention is to provide a quick-connect assembly, which aims to improve the problems of inconvenient disassembly and assembly and easy hydraulic oil leakage during disassembly and assembly of existing folding bicycle connector assemblies.

[0005] This utility model is implemented as follows: A quick connector assembly includes a left connector assembly for connecting a left oil pipe and a right connector assembly for connecting a right oil pipe. The left connector assembly includes a left spring and a left valve core. The left spring can push the left valve core to the right to seal the right port of the left connector assembly. The right connector assembly includes a right connector body, in which a right spring, a right valve core, and a floating piston are disposed. The floating piston is slidably disposed within the right connector body. The right valve core passes through the floating piston, and the right spring is sleeved on the right valve core, with its left and right ends respectively connected to the floating piston and the right valve core. Next, the right spring can push the floating piston to the left, causing the right valve core to block the floating piston; the right end of the left connector assembly is provided with a plug-in part, the outer wall of the plug-in part is provided with a protrusion, the right connector body is provided with a waist hole, one end of the waist hole is provided with a locking groove on the left side, and the other end of the waist hole is provided with a plug-in groove leading to the left end of the right connector body. The protrusion can be inserted into the waist hole through the plug-in groove, and after rotating a certain angle, it slides along the waist hole into the locking groove to complete the locking. At this time, the left spring and the right spring are in a compressed state, the plug-in part is pressed tightly against the floating piston, and the right valve core is inserted into the plug-in part.

[0006] Furthermore, the right end of the floating piston is provided with a guide ring portion, which slides in contact with the inner wall of the right connector body. The cylindrical wall at the left end of the floating piston is provided with a first annular groove, in which a first sealing ring is provided. The inner wall of the right connector body presses the first sealing ring to form a sealing structure.

[0007] Furthermore, a second annular groove is provided on the left end face of the floating piston, and a second sealing ring is provided in the second annular groove. When the insertion part is pressed into contact with the floating piston, the end of the insertion part presses against the second sealing ring to form a sealing structure. A third annular groove is provided on the cylindrical wall of the right end of the insertion part, and a third sealing ring is provided in the third annular groove. After the insertion part is inserted into the right connector body to a certain depth, the inner wall of the right connector body presses against the third sealing ring to form a sealing structure.

[0008] Furthermore, the right valve core includes a right fixed disc portion, a limiting post portion, a right core rod portion, and a right sealing end portion arranged sequentially from right to left. The right fixed disc portion is threadedly connected to the inner wall of the right connector body, and an oil passage hole is provided on the right fixed disc portion. The diameters of the limiting post portion and the right sealing end portion are both larger than the diameter of the right core rod portion. A second spring groove is provided at the right end of the floating piston, and the left end of the right spring is located in the second spring groove, while the right end is sleeved on the limiting post portion. A seventh annular groove is provided on the cylindrical wall of the right sealing end portion, and a seventh sealing ring is provided in the seventh annular groove. The right spring can push the floating piston to the left until the left port of the floating piston is sleeved on the right sealing end portion of the right valve core, and at this time, the inner wall of the floating piston presses against the seventh sealing ring to form a sealing structure.

[0009] Furthermore, the left connector assembly includes a left connector head and a left connector body. The left connector body includes a main body and a plug-in part, both of which are cylindrical. The plug-in part is located on the right side of the main body and they are arranged along a common central axis. The outer diameter and inner diameter of the main body are larger than the outer diameter and inner diameter of the plug-in part, respectively. The plug-in part includes a large inner diameter section, a transition inner diameter section, and a small inner diameter section arranged sequentially from left to right. The small inner diameter section is located at the right port of the plug-in part. The left spring and the left valve core are both located in the left connector body. The right end of the left connector head is threadedly connected to the main body of the left connector body, and a fourth sealing ring is provided between them. The left connector head is hollow and communicates with the inner cavity of the main body. A left oil pipe connection assembly is provided in the left connector head, and the left oil pipe connection assembly is used to connect the left oil pipe.

[0010] Furthermore, the left valve core includes a protruding column, a left sliding disc, a left core rod, and a left sealing end arranged sequentially from left to right. The right end of the left connector is provided with a first spring groove. The left end of the left spring is inserted into the first spring groove, and the right end is sleeved on the protruding column. The diameters of the left sliding disc and the left sealing end are both larger than the diameter of the left core rod. The left sliding disc is provided with an oil passage hole. The diameter of the left sliding disc is the same as the inner diameter of the main body. The left sliding disc is slidably disposed in the main body. A fifth annular groove is provided on the cylindrical wall of the left sealing end. A fifth sealing ring is provided in the fifth annular groove. The left spring can push the left valve core to the right until it is inserted into the small inner diameter section of the insertion part at the left sealing end. At this time, the inner wall of the small inner diameter section of the insertion part presses against the fifth sealing ring to form a sealing structure.

[0011] Furthermore, the left oil pipe connection assembly includes an oil pipe support core, an oil pipe crimping sleeve, and a locking bolt. The oil pipe support core has an oil passage hole that runs through it from left to right. A sixth annular groove is provided on the cylindrical wall at the right end of the oil pipe support core, and a sixth sealing ring is provided in the sixth annular groove. The oil pipe support core has a sleeve portion, and multiple full-circumferential limiting protrusions are sequentially provided on the outer wall of the sleeve portion along the circumferential direction. The left oil pipe is sleeved on the sleeve portion, and the oil pipe crimping sleeve is sleeved on the left oil pipe. The left port of the left connector has an internal thread structure, and the locking bolt is threaded into the left port of the left connector, pressing against the oil pipe crimping sleeve and the oil pipe support core. At this time, the inner wall of the left connector presses the sixth sealing ring to form a sealing structure. The locking bolt has a through hole structure, and the left oil pipe passes through the through hole structure of the locking bolt.

[0012] Furthermore, the right connector assembly also includes a right connector head and a right rotary connector head. The left end of the right connector head is threadedly connected to the right end of the right connector body, and an eighth sealing ring is provided at the connection point. The right connector head has a transverse oil passage in the left-right direction, and the left end of the transverse oil passage communicates with the inner cavity of the right connector body. The cylindrical wall of the right connector head has multiple oil passage holes leading to the transverse oil passages along its circumference. Each of the oil passage holes on the left and right sides of the right connector head is provided with... There is a set of annular grooves, in which a ninth sealing ring is disposed; the right rotary connector has a sleeve connection part and an oil pipe mounting part, the sleeve connection part has a sleeve through hole extending from left to right, the sleeve connection part is sleeved on the right connector head through its sleeve through hole, and the hole wall of the sleeve through hole presses against the ninth sealing ring to form a sealing structure; the oil pipe mounting part has a mounting cavity, and an annular oil groove is disposed on the hole wall of the sleeve through hole corresponding to the position of the oil passage through hole, the mounting cavity communicating with the annular oil groove.

[0013] Furthermore, a right oil pipe connection assembly is installed in the mounting cavity. The structure of the right oil pipe connection assembly is the same as that of the left oil pipe connection assembly. The right oil pipe connection assembly is used to connect the right oil pipe.

[0014] Furthermore, a stop is provided on the outer cylindrical wall of the right connector on the left side of the sleeve connection part, and a retaining ring groove is provided on the right side of the sleeve connection part. A retaining ring is installed in the retaining ring groove, and one or more washers are provided between the retaining ring and the right end of the sleeve connection part. The washers are sleeved on the right connector.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model designs the quick connector assembly as a left and right connector assembly, and utilizes the matching structure of the protrusion, waist hole, and locking groove, combined with the elastic return characteristics of the left and right springs, to replace the traditional threaded connection, realize quick insertion and locking, greatly shorten the disassembly and assembly time, and improve the ease of use of folding bicycles.

[0017] 2. In the left connector assembly, the left spring pushes the left valve core, causing the left sealing end to insert into the small inner diameter section of the insertion part, which works in conjunction with the fifth sealing ring to achieve a seal. In the right connector assembly, the right spring pushes the floating piston, causing the right sealing end of the right valve core to insert into the left port of the floating piston, which relies on the seventh sealing ring to form a seal. This ensures that the ports of each component are automatically sealed in the disassembled state, effectively preventing hydraulic oil leakage. This not only protects the performance of the braking system but also prevents hydraulic oil from corroding bicycle frames and other parts, thus extending the service life of the vehicle.

[0018] 3. In addition, this utility model ensures the sealing reliability of the oil circuit system by combining multiple sets of sealing rings such as the first sealing ring, the second sealing ring, and the third sealing ring, and also ensures the stability of brake fluid during transmission in the left and right oil pipes. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the quick connector assembly provided by this utility model;

[0020] Figure 2 This is a cross-sectional view of the quick connector assembly provided by this utility model;

[0021] Figure 3 This is a three-dimensional structural diagram of the right connector body of this utility model;

[0022] Figure 4 This is a three-dimensional structural diagram of the left valve core of this utility model;

[0023] Figure 5 This is a three-dimensional structural diagram of the right valve core of this utility model;

[0024] Figure 6 This is a three-dimensional structural diagram of the oil pipe support core of this utility model.

[0025] In the diagram: 1. Left connector; 2. Left connector body; 201. Insertion part; 202. Main body; 3. Left spring; 4. Left valve core; 401. Left sliding disc part; 402. Left core rod part; 403. Left sealing end; 404. Protruding post part; 405. Fifth annular groove; 5. Right connector body; 501. Waist hole; 502. Lock groove; 503. Insertion groove; 6. Right connector; 601. Transverse oil passage; 602. Oil passage through hole; 7. Right spring; 8. Right valve core; 801. Right fixed disc part; 802. Limiting post part; 803. Right core rod part; 804. Right sealing end; 805. Seventh annular groove; 9. Floating Piston; 10. Left oil pipe; 11. Right oil pipe; 12. First sealing ring; 13. Second sealing ring; 14. Third sealing ring; 15. Fourth sealing ring; 16. Fifth sealing ring; 17. Oil pipe support core; 1701. Sixth annular groove; 1702. Sleeve joint; 1703. Limiting protrusion structure; 18. Oil pipe crimp sleeve; 19. Locking bolt; 20. Sixth sealing ring; 21. Seventh sealing ring; 22. Right rotary connector; 2201. Sleeve joint; 2202. Oil pipe mounting part; 2203. Annular oil groove; 23. Eighth sealing ring; 24. Snap ring; 25. Washer; 26. Ninth sealing ring; 27. Protrusion. Detailed Implementation

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0028] like Figure 1 and Figure 2 As shown, a quick-connect assembly includes a left connector assembly for connecting a left oil pipe 10 and a right connector assembly for connecting a right oil pipe 11. The left connector assembly includes a left connector head 1, a left connector body 2, a left spring 3, and a left valve core 4. The left connector body 2 includes a main body 202 and a plug-in portion 201, both cylindrical in shape. The plug-in portion 201 is located on the right side of the main body 202 and shares a central axis. The outer and inner diameters of the main body 202 are larger than those of the plug-in portion 201, respectively. The plug-in portion 201 includes a large inner diameter section, a transition inner diameter section, and a small inner diameter section arranged sequentially from left to right. The small inner diameter section is located at the right end of the plug-in portion 201. The left spring 3 and the left valve core 4 are both located within the left connector body 2. The right end of the left connector 1 is threadedly connected to the main body 202 of the left connector 2, and a fourth sealing ring 15 is provided between the two. The left connector 1 is hollow and communicates with the inner cavity of the main body 202.

[0029] like Figure 2 and Figure 4 As shown, the left valve core 4 includes a protruding post 404, a left sliding disc 401, a left core rod 402, and a left sealing end 403 arranged sequentially from left to right. The right end of the left connector 1 is provided with a first spring groove. The left end of the left spring 3 is inserted into the first spring groove, and the right end is sleeved on the protruding post 404. The diameters of the left sliding disc 401 and the left sealing end 403 are both larger than the diameter of the left core rod 402. The left sliding disc 401 is provided with an oil passage hole. The diameter of the left sliding disc 401 is the same as the inner diameter of the main body 202. The left sliding disc 401 is slidably disposed in the main body 202. A fifth annular groove 405 is provided on the cylindrical wall of the left sealing end 403, and a fifth sealing ring 16 is provided in the fifth annular groove 405. The left spring 3 can push the left valve core 4 to the right until the left sealing end 403 is inserted into the small inner diameter section of the insertion part 201. At this time, the inner wall of the small inner diameter section of the insertion part 201 presses the fifth sealing ring 16 to form a sealing structure, that is, the left spring 3 can push the left valve core 4 to the right to seal the right port of the left connector assembly.

[0030] like Figure 2 and Figure 6 As shown, the left connector 1 is provided with a left oil pipe connection assembly, which is used to connect the left oil pipe 10. The left oil pipe connection assembly includes an oil pipe support core 17, an oil pipe crimping sleeve 18, and a locking bolt 19. The oil pipe support core 17 has an oil passage hole that runs through it from left to right. A sixth annular groove 1701 is provided on the cylindrical wall at the right end of the oil pipe support core 17, and a sixth sealing ring 20 is provided in the sixth annular groove 1701. The tubing support core 17 has a sleeve portion 1702. Multiple circular limiting protrusions 1703 are sequentially arranged on the outer wall of the sleeve portion 1702 along the circumferential direction. The left tubing 10 is sleeved on the sleeve portion 1702, and the tubing crimp sleeve 18 is sleeved on the left tubing 10. The left port of the left connector 1 has an internal thread structure. The locking bolt 19 is threaded in the left port of the left connector 1 and tightens the tubing crimp sleeve 18 and the tubing support core 17. At this time, the inner wall of the left connector 1 presses the sixth sealing ring 20 to form a sealing structure. The locking bolt 19 has a through hole structure, and the left tubing 10 passes through the through hole structure of the locking bolt 19.

[0031] like Figure 1 and Figure 2 As shown, the right connector assembly includes a right connector body 5, a right connector head 6, and a right rotary connector head 22. The right connector body 5 contains a right spring 7, a right valve core 8, and a floating piston 9. The right end of the floating piston 9 has a guide ring, which is annular and slides against the inner wall of the right connector body 5. A first annular groove is provided on the cylindrical wall at the left end of the floating piston 9, and a first sealing ring 12 is placed within this groove. The inner wall of the right connector body 5 presses against the first sealing ring 12 to form a sealing structure. Thus, the floating piston 9 is slidably and sealingly disposed within the right connector body 5, ensuring a seal between the floating piston 9 and the right connector body 5 even when the floating piston 9 slides within the right connector body 5.

[0032] like Figure 1 , Figure 2 and Figure 5As shown, the right valve core 8 includes a right fixed disc portion 801, a limiting post portion 802, a right core rod portion 803, and a right sealing end portion 804 arranged sequentially from right to left. The right fixed disc portion 801 is threadedly connected to the inner wall of the right connector body 5, and an oil passage hole is provided on the right fixed disc portion 801. The diameters of the limiting post portion 802 and the right sealing end portion 804 are both larger than the diameter of the right core rod portion 803. The floating piston 9 is hollow and has a through-hole structure that extends from left to right. The right core rod portion 803 of the right valve core 8 passes through the floating piston 9. A second spring groove is provided at the right end of the floating piston 9. The left end of the right spring 7 is located in the second spring groove, and the right end is sleeved on the limiting post portion 802. A seventh annular groove 805 is provided on the cylindrical wall of the right sealing end 804, and a seventh sealing ring 21 is provided in the seventh annular groove 805. The right spring 7 can push the floating piston 9 to the left until the left port of the floating piston 9 is fitted onto the right sealing end 804 of the right valve core 8, and at this time, the inner wall of the floating piston 9 presses against the seventh sealing ring 21 to form a sealing structure. That is, the right spring 7 can push the floating piston 9 to the left, so that the right valve core 8 blocks the oil passage of the floating piston 9 to prevent oil leakage.

[0033] like Figures 1-3 As shown, a protrusion 27 is provided on the outer wall of the insertion part 201 of the left connector body 2, and a waist hole 501 is provided on the right connector body 5. A locking groove 502 is provided on the left side of one end of the waist hole 501, and an insertion groove 503 leading to the left end of the right connector body 5 is provided on the other end of the waist hole 501. The protrusion 27 can be inserted into the waist hole 501 through the insertion groove 503. After rotating a certain angle, it slides along the waist hole 501 into the locking groove 502 to complete the locking. At this time, the left spring 3 and the right spring 7 are in a compressed state, the insertion part 201 is pressed and connected to the floating piston 9, and the right sealing end 804 of the right valve core 8 is inserted into the large inner diameter section of the insertion part 201, or partially inserted into the large inner diameter section of the insertion part 201 and partially inserted into the transition inner diameter section of the insertion part 201. At this time, there is a certain gap between the right sealing end 804 and the right core rod part 803 and the inner wall of the insertion part 201 for oil to pass through. A second annular groove is provided on the left end face of the floating piston 9, and a second sealing ring 13 is provided in the second annular groove. When the insertion part 201 is pressed tightly against the floating piston 9, the end of the insertion part 201 presses against the second sealing ring 13 to form a sealing structure. A third annular groove is provided on the cylindrical wall of the right end of the insertion part 201, and a third sealing ring 14 is provided in the third annular groove. After the insertion part 201 is inserted into the right connector body 5 to a certain depth, the inner wall of the right connector body 5 presses against the third sealing ring 14 to form a sealing structure, so that there is no oil leakage between the outer wall of the insertion part 201 and the inner wall of the right connector body 5. When the insertion part 201 is pressed tightly against the floating piston 9, the inner wall of the right connector body 5 presses against the third sealing ring 14.

[0034] like Figure 1 and Figure 2As shown, the left end of the right connector 6 is threadedly connected to the right end of the right connector body 5, and an eighth sealing ring 23 is provided at the connection point to prevent oil leakage. The right connector 6 has a transverse oil passage 601 running left to right. The left end of the transverse oil passage 601 communicates with the inner cavity of the right connector body 5. Four oil passage holes 602 leading to the transverse oil passage 601 are provided along the circumference of the cylindrical wall of the right connector 6. A set of annular grooves is provided on each side of the oil passage holes 602 of the right connector 6, and a ninth sealing ring 26 is provided in these annular grooves. The right-hand rotary connector 22 has a sleeve connection part 2201 and an oil pipe mounting part 2202. The sleeve connection part 2201 has a through-hole extending from left to right. The sleeve connection part 2201 is fitted onto the right connector 6 through its through-hole, and the wall of the through-hole presses against the ninth sealing ring 26 to form a sealing structure, preventing oil leakage between the sleeve connection part 2201 and the right connector 6. The oil pipe mounting part 2202 has a mounting cavity. An annular oil groove 2203 is provided on the wall of the through-hole corresponding to the position of the oil passage through-hole 602. The mounting cavity communicates with the annular oil groove 2203. A right oil pipe connection assembly is installed in the mounting cavity. The structure of the right oil pipe connection assembly is the same as that of the left oil pipe connection assembly. The right oil pipe connection assembly is used to connect the right oil pipe 11. Oil in the transverse oil passage 601 can enter the annular oil groove 2203 through each oil passage through hole 602, and then enter the right oil pipe 11 through the channel between the mounting cavity and the annular oil groove 2203.

[0035] like Figure 1 and Figure 2 As shown, a stop is provided on the outer cylindrical wall of the right connector 6 on the left side of the sleeve connection part 2201, and a snap ring groove is provided on the right side of the sleeve connection part 2201. A snap ring 24 is installed in the snap ring groove. One or more washers 25 are provided between the snap ring 24 and the right end of the sleeve connection part 2201. The washers 25 are sleeved on the right connector 6. By setting an appropriate number and thickness of washers 25, axial movement of the right rotating connector 22 relative to the right connector 6 can be prevented.

[0036] Reference Figure 2One oil circuit path of the assembled quick connector assembly: oil enters the inner cavity of the left connector 1 through the oil passage hole of the oil pipe support core 17 from the left oil pipe 10. This inner cavity is connected to the main body 202 of the left connector body 2. Therefore, the oil enters the main body 202 and then enters the insertion part 201 through the oil passage hole of the left sliding plate part 401. At this time, the right port of the insertion part 201 is tightly fitted with the left end of the floating piston 9. The second sealing ring 13 ensures the seal at the connection between the two. The oil enters the floating piston 9 and then enters the transverse oil passage 601 of the right connector 6 through the oil passage hole provided on the right fixed plate part 801. Then, it enters the annular oil groove 2203 of the right rotary connector 22 through the oil passage hole 602 of each right connector 6. The annular oil groove 2203 communicates with the mounting cavity of the oil pipe mounting part 2202, and the right oil pipe connecting assembly is installed in the mounting cavity. The right oil pipe connecting assembly is connected to the right oil pipe 11. Therefore, the oil in the annular oil groove 2203 can enter the right oil pipe 11 through the oil passage through hole of the oil pipe support core 17 of the right oil pipe connecting assembly, thus realizing the oil passage connection between the left oil pipe 10 and the right oil pipe 11.

[0037] The sealing principle of the assembled quick-connect assembly is as follows: the sixth sealing ring 20 ensures the seal between the left connector 1 and the left oil pipe connection assembly; the fourth sealing ring 15 ensures the seal between the left connector 1 and the left connector body 2; the second sealing ring 13 ensures the seal between the right end of the insertion part 201 and the left end of the floating piston 9; the third sealing ring 14 ensures the seal between the outer wall of the insertion part 201 and the inner wall of the right connector body 5; the first sealing ring 12 ensures the seal between the outer wall of the floating piston 9 and the inner wall of the right connector body 5; the eighth sealing ring 23 ensures the seal between the connection between the right connector 6 and the right connector body 5; the ninth sealing ring 26 ensures the seal between the hole wall of the sleeve connection part 2201 and the outer wall of the right connector 6; and the sealing ring provided on the oil pipe support core 17 of the right oil pipe connection assembly ensures the seal between the right oil pipe connection assembly and the oil pipe mounting part 2202.

[0038] The sealing principle of the disassembled left connector assembly: The sixth sealing ring 20 ensures the seal between the left connector head 1 and the left oil pipe connection assembly, and the fourth sealing ring 15 ensures the seal between the left connector head 1 and the left connector body 2. At this time, under the action of the left spring 3, the left sealing end 403 of the left valve core 4 is inserted into the small inner diameter section of the insertion part 201, and the fifth sealing ring 16 ensures the seal between the inner wall of the small inner diameter section of the insertion part 201 and the left sealing end 403, thus ensuring that the disassembled left connector assembly does not leak oil.

[0039] The sealing principle of the disassembled right connector assembly: The sealing ring on the oil pipe support core 17 of the right oil pipe connection assembly ensures the seal between the right oil pipe connection assembly and the oil pipe mounting part 2202; the ninth sealing ring 26 ensures the seal between the hole wall of the sleeve connection part 2201 and the outer wall of the right connector head 6; the eighth sealing ring 23 ensures the seal between the connection between the right connector head 6 and the right connector body 5; and the first sealing ring 12 ensures the seal between the outer wall of the floating piston 9 and the inner wall of the right connector body 5. At this time, under the action of the right spring 7, the floating piston 9 is pushed to the right sealing end 804 of the right valve core 8, which is inserted into the left port of the floating piston 9. The seventh sealing ring 21 is squeezed and deformed, filling the gap between the inner wall of the floating piston 9 and the right sealing end 804, preventing oil leakage between the inner wall of the floating piston 9 and the right sealing end 804. Thus, the disassembled right connector assembly does not leak oil.

[0040] Methods for assembling and disassembling quick coupling assemblies, including assembly and disassembly methods.

[0041] The assembly method includes the following steps:

[0042] S10. Insert the protrusion 27 into the waist hole 501 through the insertion slot 503;

[0043] S20. Rotate the protrusion 27 along the waist hole 501 until it reaches the locking groove 502 position and release it. Under the action of the left spring 3 and the right spring 7, the protrusion 27 is locked into the locking groove 502.

[0044] The disassembly method includes the following steps:

[0045] S100. Apply external force to the left connector assembly and the right connector assembly to overcome the elastic force of the left spring 3 and the right spring 7, and move the protrusion 27 out of the lock groove 502 into the waist hole 501.

[0046] S200, rotate the protrusion 27 in the opposite direction along the waist hole 501 until the protrusion 27 is rotated to the position of the insertion groove 503 and then release it.

[0047] S300. Pull the protrusion 27 out of the insertion slot 503 to complete the disassembly.

[0048] In summary, this utility model, by designing the quick connector assembly as a left and right connector assembly, utilizes the mating structure of the protrusion 27 with the waist hole 501 and locking groove 502, combined with the elastic return characteristics of the left spring 3 and the right spring 7, to replace the traditional threaded connection, achieving quick insertion, removal, and locking, significantly shortening the disassembly and assembly time, and improving the ease of use of the folding bicycle. Simultaneously, in the left connector assembly, the left spring 3 pushes the left valve core 4, causing the left sealing end 403 to insert into the small inner diameter section of the insertion part 201, achieving a seal with the fifth sealing ring 16; in the right connector assembly, the right spring 7 pushes the floating piston 9, causing the right sealing end 804 of the right valve core 8 to insert into the left port of the floating piston 9, relying on the seventh sealing ring 21 to form a seal, ensuring automatic sealing of the ports of each component in the disassembled state, effectively preventing hydraulic oil leakage, protecting the performance of the braking system, preventing hydraulic oil from corroding bicycle frames and other components, and extending the service life of the vehicle. In addition, the combined application of multiple sets of sealing rings, such as the first sealing ring 12, the second sealing ring 13, and the third sealing ring 14, ensures the sealing reliability of the oil circuit system and the stability of the brake fluid during transmission through the left oil pipe 10 and the right oil pipe 11.

[0049] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A quickie sub assembly comprising a left sub body assembly for connecting a left tubing and a right sub body assembly for connecting a right tubing, characterized in that, The left connector assembly includes a left spring and a left valve core. The left spring can push the left valve core to the right to seal the right port of the left connector assembly. The right connector assembly includes a right connector body, in which a right spring, a right valve core, and a floating piston are disposed. The floating piston is slidably disposed within the right connector body. The right valve core passes through the floating piston. The right spring is sleeved on the right valve core, and its left and right ends are respectively connected to the floating piston and the right valve core. The right spring can push the floating piston to the left, causing the right valve core to block the floating piston. Piston; the right end of the left connector assembly is provided with a plug-in part, the outer wall of the plug-in part is provided with a protrusion, the right connector body is provided with a waist hole, one end of the waist hole is provided with a locking groove on the left side, and the other end of the waist hole is provided with a plug-in groove leading to the left end of the right connector body. The protrusion can be inserted into the waist hole through the plug-in groove. After rotating a certain angle, it slides along the waist hole into the locking groove to complete the locking. At this time, the left spring and the right spring are in a compressed state, the plug-in part is pressed and connected with the floating piston, and the right valve core is inserted into the plug-in part.

2. A quick coupling assembly according to claim 1, wherein, The right end of the floating piston is provided with a guide ring portion, which slides in contact with the inner wall of the right connector body. The cylindrical wall at the left end of the floating piston is provided with a first annular groove, in which a first sealing ring is provided. The inner wall of the right connector body presses the first sealing ring to form a sealing structure.

3. A quick coupling assembly according to claim 2, wherein, A second annular groove is provided on the left end face of the floating piston, and a second sealing ring is provided in the second annular groove. When the plug part is pressed into contact with the floating piston, the end of the plug part presses against the second sealing ring to form a sealing structure. A third annular groove is provided on the cylindrical wall of the right end of the plug part, and a third sealing ring is provided in the third annular groove. After the plug part is inserted into the right connector body to a certain depth, the inner wall of the right connector body presses against the third sealing ring to form a sealing structure.

4. A quick coupling assembly according to claim 3, wherein, The right valve core includes a right fixed disc, a limiting post, a right core rod, and a right sealing end, arranged sequentially from right to left. The right fixed disc is threadedly connected to the inner wall of the right connector body, and an oil passage hole is provided on the right fixed disc. The diameters of the limiting post and the right sealing end are both larger than the diameter of the right core rod. A second spring groove is provided at the right end of the floating piston, and the left end of the right spring is located in the second spring groove, while the right end is sleeved on the limiting post. A seventh annular groove is provided on the cylindrical wall of the right sealing end, and a seventh sealing ring is provided in the seventh annular groove. The right spring can push the floating piston to the left until the left port of the floating piston is sleeved on the right sealing end of the right valve core, and at this time, the inner wall of the floating piston presses against the seventh sealing ring to form a sealing structure.

5. A quick coupling assembly according to claim 1, wherein, The left connector assembly includes a left connector head and a left connector body. The left connector body includes a main body and a plug-in part, both of which are cylindrical. The plug-in part is located on the right side of the main body and they are arranged along the same central axis. The outer diameter and inner diameter of the main body are larger than the outer diameter and inner diameter of the plug-in part, respectively. The plug-in part includes a large inner diameter section, a transition inner diameter section, and a small inner diameter section arranged sequentially from left to right. The small inner diameter section is located at the right port of the plug-in part. The left spring and the left valve core are both located in the left connector body. The right end of the left connector head is threaded to the main body of the left connector body, and a fourth sealing ring is provided between them. The left connector head is hollow and communicates with the inner cavity of the main body. A left oil pipe connection assembly is provided in the left connector head, and the left oil pipe connection assembly is used to connect the left oil pipe.

6. A quick coupling assembly according to claim 5, wherein, The left valve core includes a protruding column, a left sliding disc, a left core rod, and a left sealing end, arranged sequentially from left to right. The right end of the left connector has a first spring groove. The left end of the left spring is inserted into the first spring groove, and the right end is sleeved on the protruding column. The diameters of the left sliding disc and the left sealing end are both larger than the diameter of the left core rod. The left sliding disc has an oil passage hole. The diameter of the left sliding disc is the same as the inner diameter of the main body. The left sliding disc is slidably disposed in the main body. The cylindrical wall of the left sealing end has a fifth annular groove. A fifth sealing ring is provided in the fifth annular groove. The left spring can push the left valve core to the right until it is inserted into the small inner diameter section of the insertion part at the left sealing end. At this time, the inner wall of the small inner diameter section of the insertion part presses against the fifth sealing ring to form a sealing structure.

7. A quick coupling assembly according to claim 5, wherein, The left oil pipe connection assembly includes an oil pipe support core, an oil pipe crimping sleeve, and a locking bolt. The oil pipe support core has an oil passage hole extending through it from left to right. A sixth annular groove is provided on the cylindrical wall at the right end of the oil pipe support core, and a sixth sealing ring is disposed within this groove. The oil pipe support core has a sleeve portion, and multiple circular limiting protrusions are sequentially arranged along the circumferential direction on the outer wall of the sleeve portion. The left oil pipe is sleeved onto the sleeve portion, and the oil pipe crimping sleeve is sleeved onto the left oil pipe. An internal thread structure is provided at the left port of the left connector. The locking bolt is threaded into the left port of the left connector and tightens against the oil pipe crimping sleeve and the oil pipe support core. At this time, the inner wall of the left connector presses against the sixth sealing ring to form a sealing structure. The locking bolt has a through hole structure, through which the left oil pipe passes.

8. A quick coupling assembly according to claim 1, wherein, The right connector assembly further includes a right connector head and a right rotary connector head. The left end of the right connector head is threadedly connected to the right end of the right connector body, and an eighth sealing ring is provided at the connection point. The right connector head has a transverse oil passage in the left-right direction, and the left end of the transverse oil passage communicates with the inner cavity of the right connector body. Multiple oil passage holes leading to the transverse oil passages are provided on the cylindrical wall of the right connector head along its circumference. A set of annular grooves is provided on each side of the oil passage holes of the right connector head, and a ninth sealing ring is provided in these annular grooves. The right rotary connector head has a sleeve connection part and an oil pipe mounting part. The sleeve connection part has a sleeve through hole in the left and right directions. The sleeve connection part is sleeved on the right connector head through its sleeve through hole, and the hole wall of the sleeve through hole presses against the ninth sealing ring to form a sealing structure. The oil pipe mounting part has a mounting cavity. An annular oil groove is provided on the hole wall of the sleeve through hole corresponding to the position of the oil passage hole. The mounting cavity communicates with the annular oil groove.

9. A quick coupling assembly according to claim 8, wherein, The mounting cavity is equipped with a right oil pipe connection assembly, which is used to connect the right oil pipe.

10. A quick coupling assembly according to claim 8, wherein, A stop is provided on the outer cylindrical wall of the right connector, on the left side of the sleeve connection part, and a retaining ring groove is provided on the right side of the sleeve connection part. A retaining ring is installed in the retaining ring groove, and one or more washers are provided between the retaining ring and the right end of the sleeve connection part. The washers are sleeved on the right connector.

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