Hydraulic fluid connecting piece

Abstract

The utility model discloses a hydraulic fluid connecting piece which comprises a connecting body, the connecting body is provided with a buckling and pressing section used for buckling and pressing a hydraulic hose, and a plurality of damping grooves distributed at intervals in the axial direction are formed in the peripheral face of the buckling and pressing section. The depth of the damping groove is gradually increased from the position close to the hose insertion end to the position away from the insertion end, the width of the groove bottom is gradually changed in the axial direction, and a variable-cross-section groove-shaped structure is formed. The variable cross-section groove-shaped structure is configured to enable the occlusal force of the steel wire layer to be distributed in a gradient manner after buckling and pressing, and the deformation of an inner hole is reduced; through the gradient design of the variable cross section of the damping groove of the buckling and pressing section, the occlusal force of the steel wire layer is distributed more uniformly, the deformation of an inner hole is reduced, and the effects of prolonging the service life, enhancing the pressure-resistant stability and reducing the local pressure mutation are further achieved; meanwhile, the limitation of homogenization is broken through, and collaborative optimization of sixty hundred thousand times of pulse leakage-free of two layers of rubber pipes and one million times of pulse leakage-free of four layers of rubber pipes is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of hydraulic pipeline connection devices, and more specifically, to a hydraulic fluid connector. Background Technology

[0002] The hydraulic hose connector industry currently suffers from severe homogenization. Over 60% of products in the global market still use Eaton's existing Yonghua design structure, with only a few international brands offering differentiated solutions. This design convergence leads to stagnant product innovation, slow technological upgrades, and an inability to meet the ever-increasing performance demands of hydraulic systems.

[0003] Existing connectors have revealed significant defects during long-term use: their simple groove structure design in the crimping area leads to uneven distribution of the steel wire layer's interlocking force. Under pulse pressure conditions, stress concentration caused by changes in the inner rubber layer and temperature accelerates seal failure; simultaneously, excessive deformation of the inner bore after crimping not only reduces fluid throughput but also causes localized pressure surges, directly affecting the product's pressure resistance and pulse life. Conventional products struggle to meet the requirements of high-frequency pulse testing, becoming a long-standing technical bottleneck in the industry. Utility Model Content

[0004] In view of the above-mentioned technical problems in related technologies, this utility model proposes a hydraulic fluid connector that can overcome the above-mentioned shortcomings of the prior art.

[0005] To achieve the above-mentioned technical objectives, the technical solution of this utility model is implemented as follows:

[0006] A hydraulic fluid connector;

[0007] The hydraulic fluid connector includes a connecting body having a crimping section for crimping a hydraulic hose. The outer circumferential surface of the crimping section is provided with a plurality of damping grooves spaced apart along the axial direction. The depth of the damping grooves gradually increases from near the hose insertion end to away from the insertion end, and the width of the groove bottom gradually changes in the axial direction, forming a variable cross-section groove structure. The variable cross-section groove structure is configured to gradient the distribution of the steel wire layer interlocking force after crimping and reduce the amount of inner hole deformation.

[0008] Furthermore, the cross-section of the damping groove is trapezoidal, and the included angle α between the two side walls of the trapezoid satisfies: 90°<α<120°.

[0009] Furthermore, the included angle β formed by the extended surfaces of the trapezoidal side walls of the damping groove is 55°-65°.

[0010] Furthermore, the ratio of the spacing L between adjacent damping grooves to the maximum groove depth H satisfies: 1.5 ≤ L / H ≤ 2.5.

[0011] Furthermore, the crimping section forms a gradient interlocking structure with the steel wire layer of the hose through the damping groove; in the gradient interlocking structure, the depth of the steel wire layer embedded in the damping groove increases by 0.2-0.4 mm from the insertion end of the hose to the distal end.

[0012] Furthermore, the crimping section includes a transition zone and a locking zone, and the distribution density of the damping groove in the locking zone is greater than that in the transition zone.

[0013] Furthermore, the damping groove depth variation gradient of the locking zone is 1.2-1.8 times that of the transition zone.

[0014] Furthermore, the connecting body is made of 20# low carbon steel with a surface hardness of HB 131-156.

[0015] Furthermore, the radius of curvature R of the bottom of the variable cross-section groove structure satisfies: 0.2mm≤R≤ 0.5mm.

[0016] Furthermore, the ratio of the axial length of the damping groove to the maximum groove depth is 3:1 to 5:1.

[0017] The beneficial effects of this utility model are as follows: by using a variable cross-section gradient design for the damping groove of the crimping section, the steel wire layer interlocking force is more evenly distributed and the inner hole deformation is reduced, thereby improving service life, enhancing pressure resistance stability, and reducing local pressure surges. At the same time, it breaks through the limitations of homogenization and achieves synergistic optimization of two-layer hoses for 600,000 cycles and four-layer hoses for 1 million pulse leak-free operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a partial cross-sectional view of a hydraulic fluid connector according to an embodiment of the present utility model;

[0020] Figure 2 This is a partial view of a hydraulic fluid connector after crimping, according to an embodiment of the present utility model;

[0021] Figure 3 This is a partial cross-sectional view of a conventional hydraulic fluid connector according to an embodiment of the present utility model;

[0022] In the diagram: 1. Connecting body; 2. Crimping section; 3. Damping groove; 6. Hose; 7. Hose wire layer. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art are within the protection scope of the present utility model.

[0024] It should be understood that in the description of the embodiments of this utility model, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of the embodiments of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0025] like Figure 1-2 As shown, a hydraulic fluid connector according to an embodiment of the present invention includes a connecting body 1, the connecting body 1 having a crimping section 2 for crimping a hydraulic hose, and a plurality of damping grooves 3 spaced apart along the axial direction on the outer peripheral surface of the crimping section 2; the depth of the damping grooves 3 gradually increases from near the insertion end of the hose to away from the insertion end, and the width of the groove bottom gradually changes in the axial direction, forming a variable cross-section groove structure; the variable cross-section groove structure is configured to gradient the distribution of the steel wire layer interlocking force after crimping and reduce the amount of inner hole deformation.

[0026] According to an embodiment of the present invention, in a specific embodiment of a hydraulic fluid connector, the cross-section of the damping groove 3 is trapezoidal, and the included angle α between the two side walls of the trapezoid satisfies: 90°<α<120°.

[0027] According to an embodiment of the present invention, in a specific embodiment of a hydraulic fluid connector, the included angle β of the opening formed by the extended surfaces of the trapezoidal side walls of the damping groove 3 is 55°-65°.

[0028] According to an embodiment of the present invention, in a specific embodiment of a hydraulic fluid connector, the ratio of the distance L between adjacent damping grooves 3 to the maximum groove depth H satisfies: 1.5≤L / H≤2.5.

[0029] According to an embodiment of the present invention, in a specific embodiment of a hydraulic fluid connector, the crimping section 2 forms a gradient engagement structure with the steel wire layer 7 of the hose 6 through the damping groove 3; in the gradient engagement structure, the depth of the steel wire layer 7 embedded in the damping groove 2 increases by 0.2-0.4 mm from the hose insertion end to the distal end.

[0030] According to an embodiment of the present invention, a hydraulic fluid connector is provided. In a specific embodiment, the crimping section 2 includes a transition zone and a locking zone, and the distribution density of the damping groove 3 in the locking zone is greater than that in the transition zone.

[0031] According to an embodiment of the present invention, in a specific embodiment of a hydraulic fluid connector, the depth variation gradient of the damping groove 3 in the locking zone is 1.2-1.8 times that of the transition zone.

[0032] According to an embodiment of the present invention, a hydraulic fluid connector is provided. In a specific embodiment, the material of the connector body 1 is 20# low carbon steel, and the surface hardness is HB 131-156.

[0033] According to an embodiment of the present invention, in a specific embodiment of a hydraulic fluid connector, the radius of curvature R of the bottom of the variable cross-section groove structure satisfies: 0.2mm≤R≤0.5mm.

[0034] According to an embodiment of the present invention, in a specific embodiment of a hydraulic fluid connector, the ratio of the axial length of the damping groove 3 to the maximum groove depth is 3:1 to 5:1.

[0035] To facilitate understanding of the above-mentioned technical solutions of this utility model, the following detailed description of the above-mentioned technical solutions of this utility model is provided through specific usage methods.

[0036] In practical use, according to the hydraulic fluid connector described in this utility model, the hydraulic hose is inserted into the crimping section of the connector body, and the crimping section is radially compressed by a crimping machine to cause plastic deformation of the damping groove; the variable cross-section groove shape with gradually changing depth promotes the formation of gradient interlocking of the hose steel wire layer, and the initial interlocking force generated by the groove depth of 0.3mm near the insertion end is 18MPa, and the interlocking force increases to 35MPa when the groove depth increases to 0.9mm at the distal end; at the same time, the groove wall with a 60-degree opening angle weds into the gap of the steel wire, so that the single groove bears The pressure difference was reduced from 7MPa in the traditional design to 4.2MPa; the deformation of the inner hole after crimping was controlled within 0.15mm, and the fluid throughput was increased by 16%; after pulse testing, the two-layer hose withstood 600,000 pulses at 60MPa pressure without leakage, and the four-layer hose completed 1 million pulses at 42MPa with a good seal, and the service life was increased by 32% compared with the traditional design; this process achieved a breakthrough in pressure resistance stability and pulse resistance performance by optimizing the groove depth gradient and the acute angle groove shape to suppress stress concentration.

[0037] In summary, by utilizing the above-mentioned technical solution of this utility model, the variable cross-section gradient design of the damping groove of the crimping section makes the steel wire layer interlocking force distribution more uniform and reduces the deformation of the inner hole, thereby achieving the effects of improving service life, enhancing pressure resistance stability, and reducing local pressure surges; at the same time, it breaks through the limitations of homogenization and achieves synergistic optimization of two-layer hoses for 600,000 pulses and four-layer hoses for 1 million pulses without leakage.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic fluid connection, characterized in that The device includes a connecting body (1) having a crimping section (2) for crimping a hydraulic hose. The outer circumferential surface of the crimping section (2) is provided with a plurality of damping grooves (3) spaced apart along the axial direction. The depth of the damping grooves (3) gradually increases from the direction near the hose insertion end to the direction away from the insertion end, and the width of the groove bottom gradually changes in the axial direction, forming a variable cross-section groove structure. The variable cross-section groove structure is configured to gradient the distribution of the steel wire layer interlocking force after crimping and reduce the amount of inner hole deformation.

2. A hydraulic fluid coupling according to claim 1, wherein, The damping groove (3) has a trapezoidal cross-section, and the included angle α between the two side walls of the trapezoid satisfies: 90°<α<120°.

3. A hydraulic fluid coupling according to claim 2, wherein, The included angle β formed by the extended surfaces of the trapezoidal side walls of the damping groove (3) is 55°-65°.

4. A hydraulic fluid coupling according to claim 3, wherein, The ratio of the spacing L between adjacent damping grooves (3) to the maximum groove depth H satisfies: 1.5≤L / H≤2.

5.

5. A hydraulic fluid coupling as recited in claim 1 wherein, The crimping section (2) forms a gradient interlocking structure with the steel wire layer (7) of the hose (6) through the damping groove (3); in the gradient interlocking structure, the depth of the steel wire layer (7) embedded in the damping groove (3) increases by 0.2-0.4 mm from the insertion end of the hose to the distal end.

6. A hydraulic fluid coupling according to claim 1, wherein, The crimping section (2) includes a transition zone and a locking zone, and the distribution density of the damping groove (3) in the locking zone is greater than that in the transition zone.

7. A hydraulic fluid coupling according to claim 6, wherein, The depth variation gradient of the damping groove (3) in the locking zone is 1.2-1.8 times that of the transition zone.

8. A hydraulic fluid coupling according to claim 1, wherein, The connecting body (1) is made of 20# low carbon steel with a surface hardness of HB 131-156.

9. A hydraulic fluid coupling according to claim 1, wherein, The radius of curvature R of the bottom of the variable cross-section groove structure satisfies: 0.2mm≤R≤0.5mm.

10. A hydraulic fluid coupling according to claim 1, wherein, The ratio of the axial length to the maximum depth of the damping groove (3) is 3:1 to 5:1.

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