Novel connecting structure of brake pipeline

Abstract

The utility model discloses a novel connecting structure of a brake pipeline, which comprises a connecting sleeve, a first brake pipe arranged in one end of the connecting sleeve, and a sealing element arranged in the connecting sleeve, wherein one side of the sealing element is matched with a boss at the end part of the first brake pipe to realize sealing; and the connecting sleeve is provided with a limiting part for limiting the sealing element in the connecting sleeve on the other side of the sealing element. According to the utility model, the sealing element can be limited.

Description

Technical field

[0001] The utility model belongs to the technical field of automobile brake system components, in particular to a novel connection structure of a brake pipeline. [Background Technology]

[0002] The layout of the brake lines on the vehicle requires a brake pipe joint to connect two independent brake pipes to form a complete vehicle brake pipe system. During assembly, a two-way joint is used to connect and secure the two sections of brake pipe. The disconnect design requires two bolts and a two-way joint, which is not economical. During assembly, the servo machine must tighten the two ends of the two-way joint twice, once at each end, which is a complex process. Chinese patent publication number CN206501850U discloses a brake tube connection structure comprising two brake tubes: a first brake tube, a second brake tube, a tail sleeve, and a double-sided sealing block disposed in the middle of the tail sleeve. The first and second brake tubes are installed into the tail sleeve from either end, located on either side of the double-sided sealing block. Compared to conventional two-way joint connections, this solution eliminates a bolt and a tightening process, offering significant economic and market value. In the aforementioned solution, the first and second brake tubes constrain the ends of the double-sided sealing block to prevent axial movement of the double-sided seal. However, since our company's novel connection structure includes the first brake tube, the tail sleeve, and the double-sided sealing block disposed in the middle of the tail sleeve, but lacks the second brake tube, the first brake tube is mounted on one end of the double-sided sealing block, but the other end is unconstrained. During the sale of this novel connection structure, the double-sided sealing block, due to the lack of axial restraint, fell out of the tail sleeve.

[0003] Therefore, it is necessary to provide a new connection structure of a brake pipe to solve the above technical problems. [Utility Model Content]

[0004] The main purpose of the utility model is to provide a novel connection structure of a brake pipeline, which can limit the position of a sealing element.

[0005] The utility model achieves the above-mentioned purpose through the following technical solution: a new connection structure of a brake line, which includes a connecting sleeve, a first brake pipe arranged inside one end of the connecting sleeve, and a sealing element arranged inside the connecting sleeve and cooperating with the end boss of the first brake pipe on one side to achieve sealing. The connecting sleeve is provided with a limiting portion on the other side of the sealing element to limit the sealing element inside the connecting sleeve.

[0006] Furthermore, the interior of the connecting sleeve is provided with a first positioning hole for positioning the first brake pipe, a second positioning hole for positioning the sealing element, and a third positioning hole for positioning the second brake pipe assembly in sequence along its axial direction.

[0007] Furthermore, the diameter of the second positioning hole is larger than that of the first positioning hole, the connection between the second positioning hole and the first positioning hole is a positioning surface for cooperating with the end boss of the first brake pipe, and the left end of the first positioning hole is set as an arc-shaped guide surface.

[0008] Furthermore, the diameter of the third positioning hole is larger than that of the second positioning hole, a conical transition groove is connected between the second positioning hole and the third positioning hole, and the limiting portion is arranged on the conical transition groove and close to one end of the sealing element.

[0009] Furthermore, the sealing element is symmetrically arranged on the left and right sides, and the left and right end faces are respectively provided with conical surfaces that cooperate with the end bosses of the first brake pipe and the second brake pipe assemblies, a through hole for the brake fluid to pass through is provided in the middle, and annular avoidance notches are symmetrically provided on the circumferential outer walls at both ends.

[0010] Furthermore, the angle of the cone is 120°.

[0011] Compared with the prior art, the beneficial effects of the new connection structure of the brake pipe of the utility model are: the limit portion provided can limit the sealing element inside the connecting sleeve to prevent the sealing element from falling out of the connecting sleeve; the arc-shaped guide surface provided at one end of the connecting sleeve can avoid stress concentration when contacting the first brake pipe; the sealing element is symmetrically arranged on the left and right, and there is no need to distinguish between the left and right ends when installing the sealing element, which saves error prevention costs and improves installation efficiency.

Brief Description of the Drawings

[0012] Figure 1 This is a schematic cross-sectional view of a novel connection structure of a brake pipe according to an embodiment of the present utility model;

[0013] Figure 2 For the embodiment of the utility model Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0014] Figure 3 This is a schematic cross-sectional view of the connecting sleeve according to an embodiment of the present utility model;

[0015] Figure 4 This is a schematic cross-sectional view of a sealing element according to an embodiment of the present invention;

[0016] The numbers in the figure represent:

[0017] 100-New connection structure of brake pipe;

[0018] 1-connecting sleeve, 11-first positioning hole, 111-arc-shaped guide surface, 12-second positioning hole, 13-third positioning hole, 131-positioning through hole, 132-inner threaded hole, 14-positioning surface, 15-tapered transition groove;

[0019] 2-first brake pipe, 21-end boss;

[0020] 3-sealing element, 31-conical surface, 32-through hole, 33-annular avoidance gap; 4-limiting part. [Specific implementation method]

[0021] Please refer to Figures 1-4 This embodiment is a new connection structure 100 for a brake line, which includes a connecting sleeve 1, a first brake line 2 arranged inside one end of the connecting sleeve 1, and a sealing element 3 arranged inside the connecting sleeve 1 and cooperating with an end boss 21 of the first brake line 2 on one side to achieve sealing. The connecting sleeve 1 is provided with a limiting portion 4 on the other side of the sealing element 3 to limit the sealing element 3 inside the connecting sleeve 1.

[0022] The interior of the connecting sleeve 1 is provided with a first positioning hole 11 for positioning the first brake pipe 2 , a second positioning hole 12 for positioning the sealing element 3 , and a third positioning hole 13 for positioning the second brake pipe assembly (not shown) in sequence along its axial direction.

[0023] The diameter of the second positioning hole 12 is larger than that of the first positioning hole 11. The connection between the second positioning hole 12 and the first positioning hole 11 forms a positioning surface 14 that mates with the end boss 21 of the first brake pipe 2. In this embodiment, the positioning surface 14 is a planar structure. After the connecting sleeve 1 is fitted over the first brake pipe 2, the end boss 21 of the first brake pipe 2 is restrained on the positioning surface 14, completing the installation and positioning of the first brake pipe 2 in the connecting sleeve 1. The left end of the first positioning hole 11 is provided with an arcuate guide surface 111. This arcuate guide surface 111 prevents stress concentration caused by contact with the first brake pipe 2.

[0024] The diameter of third locating hole 13 is larger than that of second locating hole 12, facilitating the installation of connecting sleeve 1 onto first brake pipe 2 and the placement of sealing element 3 within second locating hole 12 of connecting sleeve 1. A tapered transition groove 15 connects second and third locating holes 12, 13, and serves as a guide, ensuring that the second brake pipe assembly is more precisely pressed against the tapered surface of sealing element 3.

[0025] Sealing element 3 is bilaterally symmetrical, with tapered surfaces 31 on its left and right end faces, respectively, for mating with the end bosses of the first brake pipe 2 and the second brake pipe assembly (not shown). Preferably, the angle of tapered surface 31 is 120°. A through hole 32 for the passage of brake fluid is provided in the center of sealing element 3.

[0026] The stopper 4 is located on the tapered transition groove 15, near one end of the sealing element 3. After the connecting sleeve 1 is fitted over the first brake pipe 2, the sealing element 3 is placed within the connecting sleeve 1. The left side of the sealing element contacts and engages with the end boss 21 of the first brake pipe 2. A special punch (not shown) is used to punch an annular flange extending toward the center of the tapered transition groove 15. This annular flange serves as the stopper 4, which confines the sealing element 3 within the connecting sleeve 1 and prevents it from falling out.

[0027] When a special punch (not shown in the figure) punches out the limit portion 4 on the conical transition groove 15, in order to prevent the special punch (not shown in the figure) from contacting and damaging the sealing element 3, an annular avoidance notch 33 is provided on the circumferential outer wall of the end portion of the sealing element 3. In order to improve the versatility of the sealing element 3, the sealing element 3 is symmetrically arranged on the left and right ends, and annular avoidance notches 33 are symmetrically provided on the circumferential outer walls of the left and right ends of the sealing element 3. When installing the sealing element 3, there is no need to distinguish between the left and right ends, which saves error prevention costs and improves installation efficiency.

[0028] The second brake tube assembly (not shown) includes a second brake tube (not shown) and an externally threaded sleeve (not shown) that fits over the end of the second brake tube. Therefore, third positioning hole 13 includes a positioning through-hole 131 for positioning the end boss of the second brake tube (not shown) and an internally threaded hole 132 that mates with the externally threaded sleeve (not shown). The diameter of positioning through-hole 131 is larger than that of internally threaded hole 132. This is done, firstly, to accommodate a dedicated punch (not shown), and secondly, to prevent the axial pressure applied to the second brake tube (not shown) during installation, causing the end boss of the second brake tube (not shown) to be squeezed, extended, and deformed upward and downward, extending into positioning through-hole 131.

[0029] The assembly process of a novel brake pipe connection structure 100 is as follows: after the connecting sleeve 1 is fitted onto the first brake pipe 2, the sealing element 3 is placed within the connecting sleeve 1. The tapered surface 31 on the left side of the sealing element 3 contacts and mates with the end boss 21 of the first brake pipe 2. A special punch (not shown) is used to punch an annular flange extending toward the center of the tapered transition groove 15. This annular flange serves as a stopper 4, which can restrain the sealing element 3 within the connecting sleeve 1 and prevent it from falling out. Assembly is complete. If a second brake pipe assembly (not shown) is to be assembled at the other end of the novel brake pipe connection structure 100, an externally threaded sleeve is first fitted over the end boss of the second brake pipe. As the externally threaded sleeve is screwed deeper, the end bosses of the first and second brake pipes are subjected to increasing axial pressure, causing deformation. The angle of the tapered surface of the end boss increases, contacting the tapered surfaces 31 on both sides of the sealing element 3, thereby forming a seal, thereby achieving the purpose of sealing the first and second brake pipes.

[0030] The above descriptions are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A new connection structure for a brake line, characterized by: It includes a connecting sleeve, a first brake pipe arranged inside one end of the connecting sleeve, and a sealing element arranged inside the connecting sleeve and cooperating with the end boss of the first brake pipe on one side to achieve sealing. The connecting sleeve is provided with a limiting portion on the other side of the sealing element to limit the sealing element inside the connecting sleeve. The interior of the connecting sleeve is provided with a first positioning hole for positioning the first brake pipe, a second positioning hole for positioning the sealing element, and a third positioning hole for positioning the second brake pipe assembly in sequence along its axial direction. The diameter of the third positioning hole is larger than the diameter of the second positioning hole. A conical transition groove is connected between the second positioning hole and the third positioning hole. The limiting portion is provided on the conical transition groove and close to one end of the sealing element.

2. A novel connection structure for a brake line according to claim 1, characterized in that: The diameter of the second positioning hole is larger than that of the first positioning hole. The connection between the second positioning hole and the first positioning hole is a positioning surface for cooperating with the end boss of the first brake pipe. The left end of the first positioning hole is set as an arc-shaped guide surface.

3. A novel connection structure for a brake line according to claim 1, characterized in that: The sealing element is arranged symmetrically on the left and right sides, and the left and right end faces are respectively provided with conical surfaces that cooperate with the end bosses of the first brake pipe and the second brake pipe assemblies, a through hole for the passage of brake fluid is provided in the middle, and annular avoidance notches are symmetrically provided on the circumferential outer walls at both ends.

4. A novel connection structure for a brake line according to claim 3, characterized in that: The angle of the cone is 120°.

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