A hydraulic engineering hose anti-twist protection device

Abstract

The utility model discloses an engineering hydraulic rubber pipe anti -twist protection device, hydraulic rubber pipe center line is along left and right direction, and the inner hole of hydraulic rubber pipe left end is inserted with the core, and the outer circle of hydraulic rubber pipe left end is buckled and is pressed with the sleeve, including rubber protection cover and metal protection cover, and rubber protection cover length is greater than metal protection cover length, and rubber protection cover is sleeved on the outer circle of hydraulic rubber pipe and sleeve, and metal protection cover buckling is sleeved on the outer circle of rubber protection cover, and one end of rubber protection cover and metal protection cover is aligned with sleeve left end, and metal protection cover right end is located the right side of sleeve and core right end right end. The utility model discloses the sleeve outside the hydraulic rubber pipe end head sets up rubber protection cover and metal protection cover, and the overall torsional resistance of hydraulic rubber pipe assembly (including hydraulic rubber pipe, core and sleeve) is increased, and the bending radius of the whole of the joint is increased, and the degree of transition bending when hydraulic rubber pipe reciprocating twist and / or rotates is reduced, thereby prolongs the overall life of rubber pipe assembly.

Description

Technical Field

[0001] This utility model belongs to the field of engineering hydraulic technology, specifically relating to an anti-torsion protection device for engineering hydraulic hoses. Background Technology

[0002] Hydraulic hoses are widely used in the hydraulic systems of construction machinery such as flatbed trucks, tunnel boring machines, bridge erecting machines, and excavating machines. During various steering movements, the core, sleeve, and hydraulic hose connected to the interface of the construction machinery will repeatedly twist along with the rotation of the machinery. The core is inserted into the port of the hydraulic hose, and the core and sleeve drive the hydraulic hose to twist repeatedly. The core and sleeve are both made of hard metal materials, which will damage the hydraulic hose and cause oil leakage over time. This requires stopping the machine to replace the hydraulic hose. After a period of time, the same reason will cause the hydraulic hose to be damaged and leak oil. This method of replacing hydraulic hoses not only increases maintenance costs but also affects the construction progress. Therefore, it is urgent to solve the above problems. Utility Model Content

[0003] In order to solve the above-mentioned technical problems in the prior art, this utility model provides an engineering hydraulic hose anti-torsion protection device with simple structure, reliable connection and extended service life of hydraulic hose.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an anti-twist protection device for an engineering hydraulic hose, wherein the center line of the hydraulic hose is along the left-right direction, a core is inserted into the inner hole of the left end of the hydraulic hose, and a sleeve is pressed onto the outer circle of the left end of the hydraulic hose, including a rubber protective sleeve and a metal protective sleeve, the length of the rubber protective sleeve being greater than the length of the metal protective sleeve, the rubber protective sleeve being fitted onto the outer circle of the hydraulic hose and the sleeve, and the metal protective sleeve being pressed onto the outer circle of the rubber protective sleeve, one end of the rubber protective sleeve and the metal protective sleeve being aligned with the left end of the sleeve, and the right end of the metal protective sleeve being located to the right of the right end of the sleeve and the core.

[0005] The inner circle of the metal protective sleeve has a first annular step in the middle, and the diameter of the inner circle of the metal protective sleeve on the right side of the first annular step is larger than the diameter on the left side of the first annular step.

[0006] The inner circle of the rubber protective sleeve is provided with a second annular step on the left side. The diameter of the inner circle of the rubber protective sleeve on the right side of the second annular step is larger than the diameter on the left side of the second annular step. The part of the inner circle of the rubber protective sleeve on the left side of the second annular step is interference-fitted with the thinner section of the outer circle of the sleeve.

[0007] The outer circumference of the rubber protective sleeve consists of a cylindrical section and a conical section from the rightmost end to the right side of the metal protective sleeve. The conical section is thicker on the left and thinner on the right, and the diameter of the right end of the conical section is equal to the outer diameter of the cylindrical section.

[0008] The length of the rubber protective sleeve is 2-3 times that of the metal protective sleeve.

[0009] By adopting the above technical solution, this utility model has the following technical effects: Rubber and metal protective sleeves are installed on the outside of the sleeve at the end of the hydraulic hose to improve the overall torsional resistance of the hydraulic hose assembly (including the hydraulic hose, core and sleeve), increase the overall bending radius of the connection, reduce the degree of excessive bending of the hydraulic hose during reciprocating twisting and / or rotation, and thus extend the overall life of the hose assembly.

[0010] A torsion-resistant flexible rubber protective sleeve is used at the crimped connection of the hydraulic hose, core, and sleeve to counteract the deformation of the hydraulic hose caused by torsion. At the same time, a metal protective sleeve is crimped onto the rubber protective sleeve, and the metal protective sleeve tightens the rubber protective sleeve to ensure that the rubber protective sleeve is firmly connected to the hydraulic hose and sleeve as a whole. This maintains good coaxiality of the hydraulic hose and sleeve when torsion and / or rotation, increases the bending radius of the hydraulic hose during torsion and / or rotation, and thus avoids damage at the joint of the hydraulic hose and the sleeve / core, thereby achieving anti-torsion and / or rotation protection for the hydraulic hose. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Enlarged view of part A in the middle. Detailed Implementation

[0012] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0013] like Figure 1 and Figure 2 As shown, the centerline of the hydraulic hose 1 is along the left-right direction. A core 2 is inserted into the inner hole of the left end of the hydraulic hose 1, and a sleeve 3 is pressed onto the outer circle of the left end of the hydraulic hose 1. The anti-twist protection device for the engineering hydraulic hose of this utility model includes a rubber protective sleeve 4 and a metal protective sleeve 5. The length of the rubber protective sleeve 4 is greater than the length of the metal protective sleeve 5. The rubber protective sleeve 4 is fitted onto the outer circle of the hydraulic hose 1 and the sleeve 3. The metal protective sleeve 5 is pressed onto the outer circle of the rubber protective sleeve 4. One end of the rubber protective sleeve 4 and the metal protective sleeve 5 is aligned with the left end of the sleeve 3, and the right end of the metal protective sleeve 5 is located to the right of the right end of the sleeve 3 and the core 2.

[0014] The inner circle of the metal protective sleeve 5 is provided with a first annular step 6, and the diameter of the inner circle of the metal protective sleeve 5 on the right side of the first annular step 6 is greater than the diameter on the left side of the first annular step 6.

[0015] The inner left side of the rubber protective sleeve 4 is provided with a second annular step 7. The diameter of the inner circle of the rubber protective sleeve 4 on the right side of the second annular step 7 is larger than the diameter on the left side of the second annular step 7. The part of the inner circle of the rubber protective sleeve 4 on the left side of the second annular step 7 is interference-fitted with the thinner section of the outer circle of the sleeve 3.

[0016] The outer circle of the rubber protective sleeve 4 consists of a cylindrical section 8 and a conical section 9 from the rightmost end to the right side of the metal protective sleeve 5. The conical section 9 is thicker on the left and thinner on the right, and the diameter of the right end of the conical section 9 is equal to the outer diameter of the cylindrical section 8.

[0017] The length of the rubber protective sleeve 4 is 2-3 times the length of the metal protective sleeve 5.

[0018] A rubber protective sleeve 4 and a metal protective sleeve 5 are provided on the outside of the sleeve 3 at the end of the hydraulic hose 1. This improves the overall torsional resistance of the hydraulic hose assembly (including the hydraulic hose 1, the core 2, and the sleeve 3), increases the overall bending radius at the connection, and reduces the degree of excessive bending of the hydraulic hose 1 during reciprocating twisting and / or rotation, thereby extending the overall lifespan of the hose assembly.

[0019] A rubber protective sleeve 4 made of anti-torsion flexible material is used at the crimped connection of hydraulic hose 1, core 2 and sleeve 3 to offset the deformation of hydraulic hose 1 caused by torsion. At the same time, a metal protective sleeve 5 is crimped onto the rubber protective sleeve 4, and the metal protective sleeve 5 tightens the rubber protective sleeve 4 to ensure that the rubber protective sleeve 4 is firmly connected to hydraulic hose 1 and sleeve 3 as one unit. This maintains good coaxiality between hydraulic hose 1 and sleeve 3 when torsion and / or rotation, increases the bending radius of hydraulic hose 1 during torsion and / or rotation, thereby avoiding damage at the joint of hydraulic hose and sleeve 3 and core 2, thus achieving anti-torsion and / or rotation protection for hydraulic hose 1.

[0020] The metal protective sleeve 5 is made of stainless steel. The first annular step 6 is set in the middle of the inner circle of the metal protective sleeve 5, that is, the diameter on the right side of the inner circle of the metal protective sleeve 5 is larger than the diameter on the left side. This makes it easy to press the metal protective sleeve 5 onto the outer circle of the rubber protective sleeve 4. The left side of the inner circle of the metal protective sleeve 5 tightly clamps the rubber protective sleeve 4 onto the outer circle of the sleeve 3. The sleeve 3 has good support strength to ensure the clamping effect.

[0021] The outer circle of the left end of the sleeve 3 is matched with the second annular step 7 of the inner circle of the left port of the rubber protective sleeve 4. That is, the outer diameter of the outer circle of the left end of the sleeve 3 is slightly smaller, which has a good guiding effect, making it convenient to insert the rubber protective sleeve 4 into the outside of the sleeve 3.

[0022] The rubber protective sleeve 4 is provided with a conical section 9 and a cylindrical section 8 on the right side. This ensures that the rubber protective sleeve 4 and the longer section of the hydraulic hose 1 remain axially integrated, while also reducing the amount of rubber used and lowering costs.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A hydraulic hose anti-twist protection device, wherein the centerline of the hydraulic hose is along the left-right direction, a core is inserted into the inner hole of the left end of the hydraulic hose, and a sleeve is pressed onto the outer circumference of the left end of the hydraulic hose, characterized in that: It includes a rubber protective sleeve and a metal protective sleeve. The length of the rubber protective sleeve is greater than that of the metal protective sleeve. The rubber protective sleeve is fitted onto the outer circle of the hydraulic hose and the sleeve. The metal protective sleeve is crimped onto the outer circle of the rubber protective sleeve. One end of the rubber protective sleeve and the metal protective sleeve are aligned with the left end of the sleeve, and the right end of the metal protective sleeve is located to the right of the right end of the sleeve and the core.

2. The anti-twist protection device for engineering hydraulic hoses according to claim 1, characterized in that: The inner circle of the metal protective sleeve has a first annular step in the middle, and the diameter of the inner circle of the metal protective sleeve on the right side of the first annular step is larger than the diameter on the left side of the first annular step.

3. The anti-twist protection device for engineering hydraulic hoses according to claim 1, characterized in that: The inner circle of the rubber protective sleeve is provided with a second annular step on the left side. The diameter of the inner circle of the rubber protective sleeve on the right side of the second annular step is larger than the diameter on the left side of the second annular step. The part of the inner circle of the rubber protective sleeve on the left side of the second annular step is interference-fitted with the thinner section of the outer circle of the sleeve.

4. The anti-twist protection device for engineering hydraulic hoses according to claim 1, characterized in that: The outer circumference of the rubber protective sleeve consists of a cylindrical section and a conical section from the rightmost end to the right side of the metal protective sleeve. The conical section is thicker on the left and thinner on the right, and the diameter of the right end of the conical section is equal to the outer diameter of the cylindrical section.

5. The anti-twist protection device for engineering hydraulic hoses according to claim 1, characterized in that: The length of the rubber protective sleeve is 2-3 times that of the metal protective sleeve.

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