Oil pipe joint mechanism for hydraulic braking

Abstract

The utility model discloses an oil pipe joint mechanism for hydraulic braking, which comprises an oil pipe joint which comprises a first connecting part and a second connecting part which are tightly matched with a hydraulic oil pipe, and the surface of the oil pipe joint is provided with an assembly groove, first annular grooves which are spaced at a certain distance, and a central hole which penetrates through two ends of an oil cylinder joint; the first sealing ring is mounted in the first annular groove; the oil cylinder oil receiving port comprises a shell and a containing cavity, the bottom of the containing cavity is communicated with an oil cylinder oil cavity, and the containing cavity is constructed in the mode that after the second connecting part is inserted into the containing cavity, the cavity wall of the containing cavity is in close contact with part of the outer surface of the second connecting part and the first sealing ring, and the center hole is communicated with oil cylinder oil cavity fluid so that hydraulic fluid can pass through. A connecting through hole is formed in the shell; and the fastener penetrates through the connecting through hole and extends into the assembling groove so as to fasten the oil pipe joint to the oil receiving port of the oil cylinder. By adopting the joint mechanism, the oil pipe can be quickly connected to the oil receiving port of the oil cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic braking for non-motor vehicles, in particular to a tubing joint mechanism for hydraulic braking in a non-motor vehicle braking system. Background Art

[0002] A bicycle hydraulic braking system generally includes a brake lever mounted on the bicycle handlebar, a brake caliper mounted beside the wheel, and a hydraulic tubing connecting the two. The hydraulic tubing can guide hydraulic oil from the brake lever to the brake caliper to drive the brake caliper to perform a braking action. The hydraulic tubing is usually connected to the brake lever through a tubing joint, and the brake caliper is usually connected to the hydraulic tubing through another tubing joint.

[0003] Patent document CN102101515B discloses a hydraulic connector device for connecting a hydraulic pipeline to a hydraulic brake caliper assembly. The hydraulic connector device includes a shaft member, a drum-shaped tubing joint, a sealing member, and a fastener. The shaft member is configured to support the hydraulic brake caliper assembly to the bicycle frame member and guide the flow of hydraulic fluid between the hydraulic braking actuating device and the hydraulic brake caliper assembly.

[0004] The prior art also discloses a tubing joint mechanism for connecting a bicycle brake lever to a hydraulic tubing as Figure 1 and Figure 2 shown. It includes a hollow tubing screw 10. One end of the tubing screw 10 has an external thread 12. The inner surface of the interface of the oil cylinder connecting tubing 20 is provided with an internal thread 22. The tubing screw 10 is assembled into the oil cylinder connecting tubing 20 and is threadedly locked and connected with the oil cylinder connecting tubing 20. The tubing screw 10 further includes a copper sleeve 14 and a copper needle 16. As Figure 1 shown, the hydraulic tubing 30 extends into the hollow tubing screw 10. The copper sleeve 14 is sleeved on the hydraulic tubing 30 and is clamped between the hollow inner wall of the tubing joint 10 and the hydraulic tubing 30, thereby fixedly connecting the hydraulic tubing 30 to the tubing screw 10. One end of the copper needle 16 is a cap-shaped end, and the cap-shaped end is adapted to the inside of the interface of the oil cylinder connecting tubing 20; the other end of the copper needle 16 extends into the hydraulic tubing 30. The copper needle 16 is a hollow copper needle so that hydraulic oil can flow from the oil cylinder connecting tubing 20 into the hydraulic tubing 30 through the tubing joint mechanism. This tubing joint mechanism has a complex structure, and the copper sleeve is prone to being installed offset during installation, thus causing oil leakage problems. In addition, this joint mechanism also has problems such as insufficient locking force of the tubing screw, easy oil seepage, and high cost of the copper sleeve and copper needle. Summary of the Invention

[0005] The utility model provides a tubing joint mechanism for hydraulic braking, which can quickly install the hydraulic tubing to the oil cylinder oil connection port, and the operation is simple and convenient.

[0006] An oil pipe joint mechanism for hydraulic braking according to an embodiment of the present utility model includes: an oil pipe joint, the oil pipe joint includes a first connection portion at a first end, the first connection portion is configured to be closely fitted with a hydraulic oil pipe, and a second connection portion at a second end opposite to the first end, on the surface of which there are an assembly groove and a first annular groove spaced apart by a certain distance, and a central hole penetrating through the first end and the second end; a first sealing ring, the first sealing ring is installed in the first annular groove; an oil cylinder oil inlet, which includes a housing and a receiving cavity formed in the housing, the bottom of the receiving cavity is communicated with the oil cylinder oil cavity, the receiving cavity is configured such that after the second connection portion is inserted into the receiving cavity, the cavity wall of the receiving cavity is in close contact with a part of the outer surface of the second connection portion and the first sealing ring, and the central hole of the oil pipe joint is in fluid communication with the oil cylinder oil cavity for hydraulic fluid to pass through, and a connection through hole is provided on the housing; and a fastener, the fastener passes through the connection through hole and extends into the assembly groove to fasten the oil pipe joint to the oil cylinder oil inlet.

[0007] In an alternative embodiment, the oil pipe joint is integrally in a cylindrical shape.

[0008] In an alternative embodiment, the assembly groove includes an annular groove and an arc-shaped groove.

[0009] In an alternative embodiment, the groove wall of the assembly groove is in an arc shape.

[0010] In an alternative embodiment, the connection through hole of the housing is arranged to be aligned with the assembly groove when the second connection portion is tightly fitted into the receiving cavity.

[0011] In an alternative embodiment, the housing is configured as a clamp-shaped housing, and a first strip-shaped notch communicated with the receiving cavity is provided on one side of the housing, and a first connection through hole penetrating through the housing and crossing the first strip-shaped notch is provided on the housing part with the first strip-shaped notch, and the fastener passes through the first connection through hole and extends into the assembly groove.

[0012] In an alternative embodiment, the housing is configured as a cylindrical housing, and a first strip-shaped notch and a second strip-shaped notch communicated with the receiving cavity are respectively provided on both sides of the housing, a first connection through hole penetrating through the housing and crossing the first strip-shaped notch is provided on the housing part with the first strip-shaped notch, and a second connection through hole penetrating through the housing and crossing the second strip-shaped notch is provided on the housing part with the second strip-shaped notch; and the fastener includes a first fastener and a second fastener, the first fastener passes through the first connection through hole and extends into the assembly groove, and the second fastener passes through the second connection through hole and extends into the assembly groove.

[0013] In an alternative embodiment, the fastener includes a joint screw that is threadedly connected to the connection through-hole of the oil cylinder oil port.

[0014] In an alternative embodiment, the second connecting portion further has a second annular groove adjacent to the first annular groove. The oil pipe joint mechanism further includes a second sealing ring that can be installed in the second annular groove. After the second connecting portion is inserted into the receiving cavity, the cavity wall of the receiving cavity is in close contact with the second sealing ring.

[0015] In an alternative embodiment, the outer diameter of the first connecting portion is designed to be able to insert the first connecting portion into the hydraulic oil pipe, and the outer diameter of the first connecting portion is smaller than the outer diameter of the second connecting portion.

[0016] In an alternative embodiment, the receiving cavity is configured to receive at least a portion of the hydraulic oil pipe, and the

[0017] outer diameter of the hydraulic oil pipe is equal to the outer diameter of the second connecting portion.

[0018] In an alternative embodiment, the outer surface of the first connecting portion is configured in a shape where a plurality of barrels with one end wide and one end narrow are stacked horizontally together, with the narrow end arranged in a direction away from the second connecting portion.

[0019] In an alternative embodiment, the oil cylinder oil port is arranged at the brake handle or the brake caliper. The bottom of the receiving cavity is provided with an oil port communicating with the oil cylinder oil cavity inside the brake handle or the brake caliper. The second connecting portion is inserted into the receiving cavity until the end face of the second connecting portion contacts the bottom surface of the receiving cavity, and the central hole is aligned with the oil port at the second end so that the oil cylinder oil cavity and the oil pipe joint are in fluid communication.

[0020] In an alternative embodiment, the central hole includes an adapter hole with threads formed at the second end to assemble a pad screw into the adapter hole after the second connecting portion of the oil pipe joint is separated from the receiving cavity.

[0021] By using the oil pipe joint mechanism proposed in the embodiment of the present utility model, the number of parts is small. One end of the oil pipe joint is inserted into the hydraulic oil pipe, and the other end is inserted into the oil cylinder oil port, and then locked with a fastener, so that the hydraulic oil pipe can be quickly connected to the oil cylinder oil port, and the operation is simple and convenient. In addition, it can effectively avoid the risk of oil leakage caused by the failure to tighten the oil pipe screw in the prior art and solve the problem of screw oil leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of an oil pipe joint mechanism used in the prior art.

[0023] Figure 2 isFigure 1 Schematic cross-sectional view of the oil pipe joint mechanism shown

[0024] Figure 3 Is an exploded view of the oil pipe joint mechanism according to an embodiment of the present utility model

[0025] Figure 4 Is Figure 3 Schematic view after the hydraulic oil pipe, oil pipe joint and oil cylinder oil inlet are assembled as shown

[0026] Figure 5 Is along Figure 4 Schematic cross-sectional view of the oil pipe joint mechanism along line A-A as shown

[0027] Figure 6 Is a schematic view of the oil pipe joint according to an embodiment of the present utility model

[0028] Figure 7 Is a schematic cross-sectional view of the oil pipe joint according to an embodiment of the present utility model

[0029] Figure 8 Is along Figure 4 Schematic cross-sectional view of the oil pipe joint mechanism along line B-B as shown

[0030] Figure 9 Is an exploded view of the oil pipe joint mechanism according to another embodiment of the present utility model

[0031] Figure 10 Is Figure 9 Schematic view after the hydraulic oil pipe, oil pipe joint and oil cylinder oil inlet are assembled as shown

[0032] Figure 11 Is along Figure 10 Schematic cross-sectional view of the oil pipe joint mechanism along line B-B as shown

[0033] Reference numerals:

[0034] 10 - oil pipe screw; 12 - external thread; 14 - copper sleeve; 16 - copper pin; 20 - oil cylinder connecting oil pipe; 22 - internal thread; 30 - hydraulic oil pipe;

[0035] 110 - oil pipe joint; 112 - first connecting portion; 114 - second connecting portion; 116 - central hole; 117 - mating hole; 118 - assembly groove; 120 - first annular groove; 122 - second annular groove;

[0036] 130 - first sealing ring; 132 - second sealing ring;

[0037] 140 - Oil cylinder oil inlet; 142 - Housing; 144 - Accommodation cavity; 146 - First connection through hole; 147 - Second connection through hole; 148 - First strip-shaped notch; 149 - Second strip-shaped notch;

[0038] 150 - First fastener; 152 - Second fastener; 210 - Hydraulic oil pipe; 310 - Oil cavity of the oil cylinder; 312 - Oil port. Detailed implementation manner

[0039] The technical solutions of the embodiments will be clearly and completely described below in conjunction with the accompanying drawings of the present application. Those skilled in the art can understand that the embodiments described in the specification are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments described in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0040] In the description of this patent specification, the orientation or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "longitudinal", "transverse", "center", "vertical", "horizontal", "length", "width", "thickness", "clockwise", "counterclockwise", etc. are based on the accompanying drawings of the specification. These orientation and positional relationships are only for the convenience of describing the embodiments involved in the technical innovation of the present invention and should not be construed as limiting the scope of protection of the claims. In addition, those skilled in the art can understand that the terms "first" and "second" used in this specification to describe various components are only used to distinguish one component from another and have no meaning of sequence, and the corresponding components should not be limited by these terms.

[0041] In this patent application, non-motor vehicles include ordinary bicycles, road bicycles, mountain bicycles, electric bicycles, etc. For the hydraulic braking system of non-motor vehicles, oil cylinders are respectively provided in the brake handle and the brake caliper, and the hydraulic oil pipe fluidly connects the oil cylinders in the brake handle and the brake caliper. In order to connect the hydraulic oil pipe, an oil cylinder oil inlet will be provided at the brake handle, and an oil cylinder oil inlet will also be provided at the brake caliper. Through the oil pipe joint mechanism provided by the embodiments of the present invention, the hydraulic oil pipe can be quickly connected to the oil cylinder oil inlet at the brake handle, and the hydraulic oil pipe can also be quickly connected to the oil cylinder oil inlet at the brake caliper.

[0042] The embodiments of the present invention provide an oil pipe joint mechanism for hydraulic braking, which is used to fluidly connect the hydraulic oil pipe with the oil cylinder of the braking system.

[0043] Such as Figure 3As shown, the tubing joint mechanism includes a tubing joint 110. The tubing joint 110 includes a first connection portion 112 at the first end and a second connection portion 114 at the opposite second end. The first connection portion 112 is configured to fit tightly with the hydraulic tubing 210. The tubing joint 110 is provided with a central hole 116 along the central axis, which penetrates from the end face of the first connection portion 112 (i.e., the end face of the first end) to the end face of the second connection portion 114 (i.e., the end face of the second end) for the passage of hydraulic fluid. An assembly groove 118 is formed on the surface of the second connection portion 114. In a preferred embodiment of the present invention, the tubing joint 110 is generally in the shape of a cylinder. Figure 3 The assembly groove 118 in Figure 3 is shown as an annular groove. However, in other embodiments, it may also be an arc-shaped groove formed along the circumferential surface of the second connection portion 114, that is, the bottom surface of the groove is an arc surface. In a preferred embodiment of the present invention, as Figure 6 and Figure 7 shown, the side wall of the assembly groove 118 is formed into an arc shape. However, those skilled in the art know that in other embodiments, the side wall of the assembly groove 118 may also be a plane.

[0044] A first annular groove 120 is also formed on the surface of the second connection portion 114 at a certain distance from the assembly groove 118. The tubing joint mechanism further includes a first sealing ring 130. During assembly, the first sealing ring 130 is installed in the first annular groove 120.

[0045] In an alternative embodiment, a second annular groove 122 adjacent to the first annular groove 120 is also formed on the surface of the second connection portion 114. The tubing joint mechanism further includes a second sealing ring 132. During assembly, the second sealing ring 132 is installed in the second annular groove 122.

[0046] The tubing joint mechanism further includes an oil receiving port 140 for the oil cylinder, which includes a housing 142 and a receiving cavity 144 formed in the housing 142. The bottom of the receiving cavity 144 communicates with the oil cavity 310 of the oil cylinder. In one embodiment, as Figure 5 shown, an oil port 312 is formed at the bottom of the receiving cavity 144. The oil port 312 communicates with the oil cavity 310 of the oil cylinder. The diameter of the oil port 312 is determined according to the design requirements of use, and it is smaller than the diameter of the oil cavity 310 of the oil cylinder. The size of the receiving cavity 144 is designed such that after the second connection portion 114 is inserted into the receiving cavity 144, the cavity wall of the receiving cavity 144 is in close contact with a part of the outer surface of the second connection portion 114 and the first sealing ring 130. In an alternative embodiment, if a second sealing ring 132 is installed on the second connection portion 114, the cavity wall of the receiving cavity 144 is also in close contact with the second sealing ring 132.

[0047] As Figure 5 and Figure 7As shown, the central hole 116 includes an adapter hole 117 formed at the end of the second connecting portion 114. The adapter hole 117 communicates with the central hole 116 of the first connecting portion 112, and the diameter of the adapter hole 117 is slightly larger than the diameter of the central hole 116 formed in the first connecting portion. In the first embodiment, the diameter of the adapter hole 117 is equal to the diameter of the oil port 312. In this way, when the end of the second connecting portion 114 contacts the bottom of the receiving cavity 144, the adapter hole 117 and the oil port 312 are aligned, so that the hydraulic oil in the oil cylinder oil cavity can flow between the oil cylinder oil cavity 310 and the central hole 116. As shown, the diameter of at least part of the central hole in the second connecting portion 114 is the same as the diameter of the central hole in the first connecting portion 112.

[0048] In a preferred embodiment of the present invention, the end of the second connecting portion 114 is formed in a shape of a truncated cone, which facilitates the insertion of the second connecting portion 114 into the receiving cavity 144. In an alternative embodiment of the present invention, as Figure 5 and Figure 7 shown, the adapter hole 117 can be formed as a threaded hole. After the second connecting portion 114 of the oil pipe joint is separated from the receiving cavity 144 of the oil cylinder oil connection port 140, a gasketed screw is installed into the adapter hole 117 of the oil pipe joint, so as to play a role in blocking the outflow of hydraulic oil.

[0049] As Figure 3 shown, a first connection through hole 146 is formed in the housing 142 of the oil cylinder oil connection port 140. The oil pipe joint mechanism further includes a first fastener 150. The first fastener 150 can pass through the first connection through hole 146 of the housing 142 and extend into the assembly groove 118 of the second connecting portion 114. That is, the first connection through hole 146 is formed in the housing 142 according to the position of the assembly groove 118 after the second connecting portion 114 is inserted into the receiving cavity 144.

[0050] In one embodiment, as Figure 3 and Figure 8 shown, the surface of the first connection through hole 146 is formed with a threaded surface, the first fastener 150 is a joint screw with an external threaded surface, and the first fastener 150 is threadedly connected with the first connection through hole 146.

[0051] In an embodiment of the present utility model, the housing 142 of the oil cylinder oil connection port 140 is configured to have a first strip-shaped notch 148 communicating with the receiving cavity 144 on one side surface. In Figure 3In the illustrated embodiment, the housing 142 of the oil cylinder oil connection port 140 is configured as a clamp-shaped housing with a first strip-shaped notch 148 formed on the side, and the first strip-shaped notch 148 separates the two ends of the laterally arranged clamp-shaped housing 142. A connection through hole is formed in the housing portion having the first strip-shaped notch 148 to penetrate the housing and cross the first strip-shaped notch 148. Since the first strip-shaped notch 148 is a spatial area, it can be understood that the first connection through hole 146 penetrates this spatial area at the same time. In this way, a connection through hole is formed on the housing portion above the first strip-shaped notch 148, and a connection through hole 146 is also formed on the housing portion below the first strip-shaped notch 148. The two connection through holes are aligned with each other to form the first connection through hole penetrating the housing. In this way, the fastener 118 can sequentially extend through the first connection through hole 146 at one end of the clamp-shaped housing, the assembly groove 118, and the first connection through hole 146 at the other end of the clamp-shaped housing, so as to lock the oil pipe joint 110 at the oil cylinder oil connection port 140.

[0052] In one embodiment, the outer diameter dimension of the first connection portion 112 is designed to be able to insert the first connection portion 112 into the hydraulic oil pipe 210, and the outer diameter of the first connection portion 112 is smaller than the outer diameter of the second connection portion 114. As Figure 6 shown, the outer surface of the first connection portion 112 is configured in a shape where 4 barrels with one end wide and one end narrow are stacked horizontally together, and the narrow end is arranged in a direction away from the second connection portion 114. In this way, it is not easy for the first connection portion 112 to fall off after being pressed into the hydraulic oil pipe 210. In a further embodiment, the length dimension and width dimension of the accommodation cavity 144 are designed to be able to receive at least a part of the hydraulic oil pipe 210. As Figure 5 shown, the outer diameter of the hydraulic oil pipe 210 is equal to the outer diameter of the second connection portion 114. In this way, after a part of the hydraulic oil pipe 210 is inserted into the accommodation cavity 144, the outer surface of this part of the hydraulic oil pipe can be in close contact with the cavity wall of the accommodation cavity.

[0053] For the oil pipe joint mechanism proposed according to the embodiment of the present invention, the number of parts is small. One end of the oil pipe joint 110 is inserted into the hydraulic oil pipe 210, and the other end is inserted into the oil cylinder oil connection port 140, and then locked with the fastener 150, and the connection operation can be completed, achieving the effect of quickly connecting the hydraulic braking device to the hydraulic oil pipe. In addition, by adopting the oil pipe joint mechanism proposed according to the embodiment of the present invention, the risk of oil leakage due to the failure of tightening the screw in the prior art can be effectively avoided, and the problem of screw oil leakage can be solved. Of course, those skilled in the art can understand that there are other implementation manners for the close fit between the first connection portion 112 and the hydraulic oil pipe, and the hydraulic oil pipe 210 does not necessarily need to be inserted into the accommodation cavity 144.

[0054] Figure 9 The explosion schematic diagram of the oil pipe joint mechanism according to another embodiment of the present utility model is shown. Figure 10 isFigure 9 The schematic diagram after the hydraulic oil pipe, the oil pipe joint and the oil receiving port of the oil cylinder are assembled as shown. As Figure 9 shown, the structure of the oil pipe joint is the same as that of the oil pipe joint shown in Figure 3 . Different from the embodiment shown in Figure 3 is the design of the oil receiving port of the oil pipe. The cross-sectional schematic diagram obtained along the A-A line of the oil pipe joint mechanism shown in Figure 10 is the same as that in Figure 5 . Those skilled in the art can refer to Figure 5 to understand the internal structure diagram of the oil pipe joint mechanism of this embodiment, and the cross-sectional diagram will not be provided again here. The cross-sectional schematic diagram obtained along the B-B line of the oil pipe joint mechanism shown in Figure 10 is as shown in Figure 11 . In this embodiment, the oil receiving port 140 of the oil pipe joint further includes a housing 142 and a receiving cavity 144 formed in the housing 142. The bottom of the receiving cavity 144 communicates with the oil cavity 310 of the oil cylinder. In one embodiment, as shown in Figure 5 , an oil port 312 is opened at the bottom of the receiving cavity 144, and the oil port 312 communicates with the oil cavity 310 of the oil cylinder. The diameter of the oil port 312 is determined according to the design requirements of use, and it is smaller than the diameter of the oil cavity 310 of the oil cylinder. The size of the receiving cavity 144 is designed such that after the second connecting portion 114 is inserted into the receiving cavity 144, the cavity wall of the receiving cavity 144 is in close contact with a part of the outer surface of the second connecting portion 114 and the first sealing ring 130.

[0055] In this embodiment, the housing 142 of the oil receiving port 140 of the oil cylinder is configured to have a first strip-shaped notch 148 and a second strip-shaped notch 149 communicating with the receiving cavity 144 on both side surfaces. The housing part with the first strip-shaped notch 148 is provided with a first connecting through hole 146 that penetrates the housing and crosses the first strip-shaped notch 148, and the housing part with the second strip-shaped notch 149 is provided with a second connecting through hole 147 that penetrates the housing and crosses the second strip-shaped notch 149. In Figure 9In the illustrated embodiment, the housing 142 of the oil cylinder oil connection port 140 is configured as a cylindrical housing that is cut from the middle at the housing opening to form a first strip-shaped notch 148 and a second strip-shaped notch 149. A first connection through-hole 146 that penetrates the housing is opened in the housing portion having the first strip-shaped notch 148. Since the first strip-shaped notch 148 is a spatial region, it can be understood that the first connection through-hole 146 penetrates this spatial region at the same time. In this way, a connection through-hole is formed on the housing portion on one side of the first strip-shaped notch 148, and a connection through-hole is also formed on the housing portion on the other side of the first strip-shaped notch 148. The two connection through-holes are aligned with each other to form the first connection through-hole 146 that penetrates the housing and crosses the first strip-shaped notch 148. A second connection through-hole 147 that penetrates the housing is opened in the housing portion having the second strip-shaped notch 149. Since the second strip-shaped notch 149 is a spatial region, it can be understood that the second connection through-hole 147 penetrates this spatial region at the same time. In this way, a connection through-hole is formed on the housing portion on one side of the second strip-shaped notch 149, and a connection through-hole is also formed on the housing portion on the other side of the second strip-shaped notch 149. The two connection through-holes are aligned with each other to form the second connection through-hole 147 that penetrates the housing and crosses the second strip-shaped notch 149.

[0056] In this embodiment, the fasteners include a first fastener 150 and a second fastener 152. When the second connection portion 114 is inserted into the receiving cavity 144, the assembly grooves 118 are generally aligned with the first connection through-hole 146 and the second communication through-hole 147 respectively, so that the first fastener 150 passes through the first connection through-hole 146 and extends into the assembly groove 118, and the second fastener 152 passes through the second connection through-hole and extends into the assembly groove, thereby locking the second connection portion 114 to the oil cylinder oil connection port. In one embodiment, the assembly groove 118 can be an annular groove. In another embodiment, the assembly groove 118 can also be two arc-shaped grooves. In a preferred embodiment, the first and second fasteners are formed with external threads, the first and second connection through-holes are formed with internal threads, the first fastener is threadedly connected to the first connection through-hole, and the second fastener is threadedly connected to the second connection through-hole. Compared with the previous embodiments described, in this embodiment, since there is one more screw for the connection between the oil pipe joint and the oil cylinder oil connection port, the safety and security of locking are improved.

[0057] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A tubing joint mechanism for hydraulic braking, characterized in that, Comprising: A tubing joint, the tubing joint including a first connection portion at a first end, the first connection portion being configured to be in tight fit with a hydraulic tubing, and a second connection portion at a second end opposite to the first end, having an assembly groove and a first annular groove spaced apart by a certain distance on its surface, and a central hole penetrating through the first end and the second end; A first sealing ring, the first sealing ring being installed in the first annular groove; An oil inlet of an oil cylinder, which includes a housing and a receiving cavity formed in the housing, the bottom of the receiving cavity being in communication with an oil cavity of the oil cylinder, the receiving cavity being configured such that after the second connection portion is inserted into the receiving cavity, the cavity wall of the receiving cavity is in tight contact with a part of the outer surface of the second connection portion and the first sealing ring and the central hole of the tubing joint is in fluid communication with the oil cavity of the oil cylinder for hydraulic fluid to pass through, and a connection through-hole being provided on the housing; A fastener, the fastener passing through the connection through-hole and extending into the assembly groove to fasten the tubing joint to the oil inlet of the oil cylinder.

2. The tubing joint mechanism according to claim 1, wherein The tubing joint is integrally in a cylindrical shape, and the assembly groove includes an annular groove and an arc-shaped groove.

3. The tubing joint mechanism according to claim 2, characterized in that, The groove wall of the assembly groove is in an arc shape; and / or, the connection through-hole of the housing is arranged to be aligned with the assembly groove when the second connection portion is tightly fitted into the receiving cavity.

4. The tubing joint mechanism according to any one of claims 1 to 3, characterized in that, The housing is configured as a clamp-shaped housing, and a first strip-shaped notch communicating with the receiving cavity is provided on one side of the housing, and a first connection through-hole penetrating through the housing and crossing the first strip-shaped notch is provided on the housing part having the first strip-shaped notch, and the fastener passes through the first connection through-hole and extends into the assembly groove.

5. The tubing joint mechanism according to any one of claims 1 to 3, characterized in that The housing is configured as a cylindrical housing, and a first strip-shaped notch and a second strip-shaped notch communicating with the receiving cavity are respectively provided on both sides of the housing, a first connection through-hole penetrating through the housing and crossing the first strip-shaped notch is provided on the housing part having the first strip-shaped notch, and a second connection through-hole penetrating through the housing and crossing the second strip-shaped notch is provided on the housing part having the second strip-shaped notch; and, The fastener includes a first fastener and a second fastener, the first fastener passes through the first connection through-hole and extends into the assembly groove, and the second fastener passes through the second connection through-hole and extends into the assembly groove.

6. The tubing joint mechanism according to claim 1, characterized in that, The fastener includes a joint screw, which is in threaded connection with the connection through-hole of the oil inlet of the oil cylinder.

7. The tubing joint mechanism according to claim 1, characterized in that, The second connection portion further has a second annular groove adjacent to the first annular groove, the tubing joint mechanism further includes a second sealing ring, which can be installed in the second annular groove, and after the second connection portion is inserted into the receiving cavity, the cavity wall of the receiving cavity is in tight contact with the second sealing ring.

8. The tubing joint mechanism according to claim 2, characterized in that, The outer diameter dimension of the first connection portion is designed to be able to insert the first connection portion into the hydraulic tubing, and the outer diameter of the first connection portion is smaller than the outer diameter of the second connection portion; and, The receiving cavity is configured to receive at least a part of the hydraulic tubing, and the outer diameter of the hydraulic tubing is equal to the outer diameter of the second connection portion.

9. The tubing joint mechanism according to claim 1, characterized in that, The oil cylinder oil inlet is arranged at the brake handle or the brake caliper. An oil port communicating with the oil cylinder oil chamber inside the brake handle or the brake caliper is provided at the bottom of the accommodation cavity. The second connecting portion is inserted into the accommodation cavity until the end face of the second connecting portion contacts the bottom surface of the accommodation cavity. The central hole is aligned with the oil port at the second end so that the oil cylinder oil chamber and the oil pipe joint are in fluid communication.

10. The tubing joint mechanism according to claim 1 or 9, characterized in that, The central hole includes an adapter hole with threads formed at the second end to assemble a pad screw into the adapter hole after the second connecting portion of the oil pipe joint is separated from the accommodation cavity.

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