Connector and hydraulic external rubber pipe assembly

Abstract

The utility model relates to the technical field of engineering machinery, and discloses a joint and a hydraulic external rubber tube assembly. In the process of assembling the connector, firstly, it needs to be ensured that the buckling base is clamped to the core rod, then the core rod can be sleeved with the sleeve, the sleeve is driven to move in the axial direction till the sleeve stops moving under the limitation of the buckling base, at the moment, a buckling gap is reserved between the core rod and the sleeve, and then an external rubber pipe is placed in the buckling gap. Therefore, after the sleeve is subjected to buckling pressure, the external rubber tube can be stably buckled on the core rod. After the buckling pressure is applied to the sleeve, the sleeve applies the buckling pressure to the buckling base so as to press the external rubber tube on the core rod, at the moment, the buckling base and the sleeve are clamped and fixed, and the buckling stability is good. Meanwhile, due to the fact that the buckling and pressing base is additionally arranged, the sleeve presses the buckling and pressing base and transmits buckling and pressing force to the core rod, the core rod is prevented from being damaged due to the fact that the buckling and pressing force is too large, and the technical problem that in the prior art, the matching effect of the sleeve and the core rod is poor is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, and in particular relates to a joint and a hydraulic external hose assembly. Background Art

[0002] The hydraulic external hose assembly is a commonly used auxiliary device in the hydraulic system, used for hydraulic power transmission or transporting high-pressure media such as water, gas, and oil to ensure the circulation of liquid and transfer liquid energy. The hydraulic external hose assembly mainly consists of two parts: the connector and the external hose. The connection between the connector and the external hose is mostly connected by "crimping". The split external hose connector usually consists of three parts: a "core rod", a "sleeve" and a "nut". The connector and the external hose are connected together by crimping. The sleeve and core rod of the split connector are separate. When in use, the sleeve and the external hose port are pressed together onto the core rod by crimping to seal. However, there are often technical problems such as excessive crimping of the sleeve and core rod or loose crimping. Utility Model Content

[0003] The purpose of the utility model is to provide a joint and a hydraulic external hose assembly, which solves the technical problem of poor matching effect between a sleeve and a core rod in the prior art.

[0004] In order to achieve the above object, the utility model provides a joint, which includes:

[0005] sleeve;

[0006] The core rod is inserted into the sleeve, and the outer periphery of the core rod is fitted with the external hose;

[0007] The pressing base is engaged with the core rod. Before the pressing pressure is applied to the sleeve, a pressing gap is left between the core rod and the sleeve, and the external hose is located in the pressing gap. After the pressing pressure is applied to the sleeve, the sleeve presses the external hose onto the core rod, and the pressing base is engaged with the sleeve.

[0008] In an embodiment of the present invention, a buckling groove is provided on the outer peripheral wall of the core rod, and the buckling base includes a base body and a first protrusion provided on the base body and extending toward one side of the core rod, and the first protrusion is used to engage with the buckling groove.

[0009] In an embodiment of the present invention, a limiting groove is formed on the sleeve, and a second protrusion is provided on the side of the base body facing the sleeve. After a buckling pressure is applied to the sleeve, the second protrusion is adapted to engage with the limiting groove.

[0010] In an embodiment of the present invention, the base body, the first protruding portion, and the second protruding portion are integrally formed.

[0011] In an embodiment of the present invention, a locking tooth extending in the radial direction is provided on the edge of the top end of the limiting groove, and the locking tooth has a limiting surface for axially limiting a side surface of the second protrusion.

[0012] In an embodiment of the present invention, a plurality of buckling teeth are axially spaced apart on the inner circumferential wall of the sleeve, and a plurality of buckling fixing portions are axially spaced apart on the outer circumferential wall of the core rod, and the plurality of buckling fixing portions are arranged in one-to-one correspondence with the plurality of buckling teeth.

[0013] In an embodiment of the present invention, the pressing tooth portion includes a first inclined surface, a connecting surface, and a second inclined surface connected end to end in a direction away from the locking tooth, and the inclination angle of the first inclined surface is smaller than the inclination angle of the second inclined surface.

[0014] In an embodiment of the present invention, the pressing base is made of metal.

[0015] In an embodiment of the present invention, the joint further comprises a connecting piece, which is sleeved on the core rod and is used to connect the core rod and the external component.

[0016] In an embodiment of the present invention, a hydraulic external hose assembly is provided, comprising the joint as described above and an external hose.

[0017] Through the above technical solution, the joint and hydraulic external hose assembly provided by the embodiment of the utility model have the following beneficial effects:

[0018] The connector in this embodiment includes a sleeve, a core rod, and a crimping base. The core rod is inserted into the sleeve, and an external hose is also sleeved around the outer circumference of the core rod. During connector assembly, the crimping base must first be secured to the core rod. The sleeve can then be placed over the core rod and driven axially until it stops within the crimping base. This creates a crimping gap between the core rod and the sleeve. The external hose is then placed within the crimping gap to ensure that the sleeve, when subjected to crimping pressure, can securely crimp the external hose to the core rod. After the sleeve is subjected to crimping pressure, the sleeve applies a crimping force to the crimping base, pressing the external hose against the core rod. At this point, the crimping base and sleeve are securely engaged, providing improved crimping stability. Furthermore, the addition of the crimping base in this embodiment allows the sleeve to press against the crimping base and transmit the crimping force to the core rod, preventing damage to the core rod due to excessive crimping force. This addresses the technical issue of poor sleeve-core rod coordination in the prior art.

[0019] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without inventive work. In the drawings:

[0021] Figure 1 It is a structural schematic diagram of the joint according to the utility model;

[0022] Figure 2 It is a partial schematic diagram of the joint according to the present utility model.

[0023] Description of Reference Numerals

[0024] 1 sleeve 2 core rod

[0025] 11 Limiting groove 21 Buckling fixing part

[0026] 12 Locking teeth 3 Pressing base

[0027] 13 Pressing teeth 31 Base body

[0028] 131 first inclined surface 32 first protruding portion

[0029] 132 connecting surface 33 second protrusion

[0030] 133 Second inclined surface 4 Connecting piece DETAILED DESCRIPTION

[0031] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0032] The joint and the hydraulic external hose assembly according to the present invention will be described below with reference to the accompanying drawings.

[0033] like Figure 1 As shown, in this embodiment, a joint is proposed, which includes a sleeve 1, a core rod 2 and a pressing base 3. The core rod 2 is inserted into the sleeve 1, and the outer periphery of the core rod 2 is fitted with the external rubber hose. The pressing base 3 is snap-fitted with the core rod 2. Before the pressing force is applied to the sleeve 1, a pressing gap is left between the core rod 2 and the sleeve 1, and the external rubber hose is located in the pressing gap. After the pressing force is applied to the sleeve 1, the sleeve 1 presses the external rubber hose onto the core rod 2, and the pressing base 3 is snap-fitted with the sleeve 1. It should be noted that the axial direction, i.e. Figure 1 Left and right direction in .

[0034] In this embodiment, during the assembly of the joint, it is first necessary to ensure that the crimping base 3 and the core rod 2 are fully engaged. Then, the sleeve 1 is placed on the core rod 2 and driven to move axially until the sleeve 1 stops moving under the limit of the crimping base 3. At this time, a crimping gap is left between the core rod 2 and the sleeve 1. The external hose is then placed in the crimping gap to ensure that the sleeve 1 can firmly crimp the external hose onto the core rod 2 after being subjected to the crimping pressure. After the crimping pressure is applied to the sleeve 1, the sleeve 1 applies the crimping pressure to the crimping base 3 to press the external hose onto the core rod 2. At this time, the crimping base 3 and the sleeve 1 are locked and fixed, and the crimping stability is better. At the same time, because the crimping base 3 is added in this embodiment, the sleeve 1 presses the crimping base 3 and transmits the crimping pressure to the core rod 2, avoiding damage to the core rod 2 due to excessive crimping pressure, thereby solving the technical problem of poor fit between the sleeve 1 and the core rod 2 in the prior art.

[0035] like Figure 1 As shown, in this embodiment, a buckling groove is further provided on the outer peripheral wall of the core rod 2, and the buckling groove is arranged to extend circumferentially along the core rod 2. The buckling base 3 includes a base body 31 and a first protrusion 32 provided on the base body 31 and extending toward one side of the core rod 2. The first protrusion 32 is used to engage with the buckling groove. The first protrusion 32 is clamped in the buckling groove by a pre-buckled method similar to an integrated joint. The connection effect is stable and can effectively resist axial external force, thereby preventing the buckling base 3 from sliding axially along the core rod 2 due to axial external force.

[0036] like Figure 1 and Figure 2 As shown, in this embodiment, a limiting groove 11 is formed on the sleeve 1, and the limiting groove 11 is arranged to extend circumferentially along the sleeve 1. A second protrusion 33 is also provided on the side of the base body 31 facing the sleeve 1. The opening size of the limiting groove 11 is adapted to the size of the second protrusion 33, which can ensure that after the buckling pressure is applied to the sleeve 1, the second protrusion 33 and the limiting groove 11 can be adapted and engaged, and the positioning stability is good, so that the buckling base 3 can be firmly pressed on the core rod 2, avoiding the sleeve 1 from being offset relative to the buckling base 3 during the buckling process.

[0037] In this embodiment, the base body 31 , the first protrusion 32 , and the second protrusion 33 are integrally formed, which has good structural stability, is simple to manufacture, and has low production costs.

[0038] like Figure 1As shown, in this embodiment, a radially extending locking tooth 12 is provided at the top edge of the limiting groove 11. The locking tooth 12 has a limiting surface that axially limits one side surface of the second raised portion 33, thereby restricting the movement of the sleeve 1. During the joint assembly process, the sleeve 1 moves axially from right to left until the limiting surface abuts the second raised portion 33, at which point the sleeve 1 stops moving. At this point, it is determined that the sleeve 1 has reached the predetermined crimping position, and the external hose can be placed in the crimping gap to begin crimping the sleeve 1.

[0039] like Figure 2 As shown, the inner circumferential wall of the sleeve 1 is provided with a plurality of axially spaced, evenly spaced, crimping teeth 13. The outer circumferential wall of the core rod 2 is provided with a plurality of axially spaced, fixed, and secured portions 21. The plurality of fixed, and secured portions 21 are arranged in a one-to-one correspondence with the plurality of crimping teeth 13. In this embodiment, four crimping teeth 13 are provided, and the number of crimping teeth 13 can be adjusted according to actual needs. When the sleeve 1 is pressed against the outer circumference of the core rod 2 by the crimping pressure, the crimping teeth 13 tilt the pressure unilaterally and cooperate with the core rod 2 to clamp the external hose, thereby firmly locking the external hose and effectively preventing axial external forces from pulling the external hose out from between the core rod 2 and the sleeve 1. The top end of the crimping teeth 13 is curved to prevent the crimping teeth 13 from puncturing and damaging the external hose when pressed against the external hose by the crimping pressure.

[0040] In this embodiment, the buckling fixing portion 21 is an inclined surface, which plays a guiding role, so that the buckling tooth portion 13 can be tilted by the buckling pressure after contacting the inclined surface.

[0041] Furthermore, a storage gap is left between the base body 31 and the core rod 2 for inserting an external hose. The external hose is placed in the storage gap, and then under the action of the buckling pressure, the buckling base 3 is squeezed by the sleeve 1, so that the buckling base 3 compresses the storage gap and finally presses the external hose onto the core rod 2. In this way, the external hose can be compressed by the buckling base 3, further improving the effect of compressing the external hose and ensuring that the external hose can be stably buckled onto the core rod 2. Among them, the size of the locking teeth 12 can be adjusted according to actual needs, and it is sufficient to cooperate with the locking teeth 12 to achieve effective limiting. It is also because of the addition of the buckling base 3 that the thickness of the sleeve 1 can be correspondingly thinned, which can effectively reduce the production cost of the sleeve 1.

[0042] like Figure 1As shown, in this embodiment, the pressing tooth portion 13 includes a first inclined surface 131, a connecting surface 132 and a second inclined surface 133 which are connected end to end in a direction away from the locking tooth 12. The first inclined surface 131 and the second inclined surface 133 are respectively located on the left and right sides of the connecting surface 132. Since the inclination angle of the first inclined surface 131 is smaller than the inclination angle of the second inclined surface 133, the pressing tooth portion 13 will tilt to the left under the action of the pressing pressure and press the external hose, which can further prevent the external hose from being pulled out from between the core rod 2 and the sleeve 1 by the axial external force.

[0043] In this embodiment, the pressing base 3 is made of metal. Optionally, the pressing base 3 can be made of standard 20 steel. Since the sleeve 1 in this embodiment is subject to deformation due to external compressive forces, the sleeve 1 can be made of standard 20 steel. The core rod 2 can be made of standard 35 steel to prevent damage to the core rod 2 structure after the sleeve 1 is pressed.

[0044] like Figure 1 As shown, in this embodiment, the joint further includes a connector 4, which is sleeved onto the core rod 2 and spaced apart from the crimping base 3. The connector 4 is located to the left of the crimping base 3 and at the end of the core rod 2. The connector 4 is used to connect the core rod 2 and the external component, thereby facilitating the assembly of the joint and the external component. In this embodiment, the connector 4 is a nut, which can be easily assembled with the external component through threaded engagement. Of course, other connection methods can also be used as needed.

[0045] In this embodiment, a hydraulic external hose assembly is provided, comprising the connector and the external hose as described above. Since the hydraulic external hose assembly adopts all embodiments of the connector, it also has all the beneficial effects brought by the connector, which will not be described in detail here.

[0046] In the description of this utility model, it should be understood that 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 technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0047] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0049] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A joint, characterized in that: The connector comprises: Sleeve (1); A core rod (2) is inserted into the sleeve (1), and the outer periphery of the core rod (2) is fitted with the external rubber hose; The pressing base (3) is engaged with the core rod (2). Before the pressing force is applied to the sleeve (1), a pressing gap is left between the core rod (2) and the sleeve (1), and the external rubber hose is located in the pressing gap. After the pressing force is applied to the sleeve (1), the sleeve (1) presses the external rubber hose onto the core rod (2), and the pressing base (3) is engaged with the sleeve (1).

2. The connector according to claim 1, wherein A buckling groove is provided on the outer peripheral wall of the core rod (2); the buckling base (3) comprises a base body (31) and a first protrusion (32) provided on the base body (31) and extending toward one side of the core rod (2); the first protrusion (32) is used for engaging with the buckling groove.

3. The joint according to claim 2, characterized in that A limiting groove (11) is formed on the sleeve (1), and a second protrusion (33) is provided on a side of the base body (31) facing the sleeve (1). After a buckling pressure is applied to the sleeve (1), the second protrusion (33) is adapted to be snap-fitted with the limiting groove (11).

4. The joint according to claim 3, characterized in that The base body (31), the first raised portion (32), and the second raised portion (33) are integrally formed.

5. The joint according to claim 3, characterized in that A locking tooth (12) extending radially is provided at the edge of the top end of the limiting groove (11), and the locking tooth (12) has a limiting surface for axially limiting a side surface of the second protrusion (33).

6. The joint according to claim 5, characterized in that A plurality of buckling teeth (13) are provided on the inner peripheral wall of the sleeve (1) at intervals along the axial direction, and a plurality of buckling fixing portions (21) are provided on the outer peripheral wall of the core rod (2) at intervals along the axial direction. The plurality of buckling fixing portions (21) are arranged in a one-to-one correspondence with the plurality of buckling teeth (13).

7. The connector according to claim 6, wherein: The pressing tooth portion (13) comprises a first inclined surface (131), a connecting surface (132), and a second inclined surface (133) which are connected end to end in a direction away from the locking tooth (12); the inclination angle of the first inclined surface (131) is smaller than the inclination angle of the second inclined surface (133).

8. The joint according to any one of claims 1 to 7, characterized in that The buckling base (3) is made of metal.

9. The joint according to any one of claims 1 to 7, characterized in that The joint further comprises a connecting piece (4), wherein the connecting piece (4) is sleeved on the core rod (2), and the connecting piece (4) is used to connect the core rod (2) and an external component.

10. A hydraulic external hose assembly, characterized in that: The invention comprises a joint according to any one of claims 1 to 9 and an external hose.

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