An inner-outer composite guide sleeve guide structure and method for an ultra-long oil cylinder

Abstract

This invention provides a guiding structure and method for an inner and outer composite guide sleeve for an ultra-long hydraulic cylinder. It includes a reinforced guide sleeve structure installed between a first guide sleeve structure and a second guide sleeve structure. The top and bottom of the reinforced guide sleeve structure are respectively inserted into the inner walls of the first and second guide sleeve structures to reinforce and fix the connection between them. The reinforced guide sleeve structure also limits the movement of the first and second guide sleeve structures, preventing bending during use. This invention is rationally designed. The reinforced guide sleeve structure includes a limiting ring with a fitting ring on its outer wall. The fitting ring has a third threaded groove inside. Reinforcing rings are provided at the bottom and top of the limiting ring. A positioning strip is provided on the outer wall of the reinforcing ring. An auxiliary ring is provided at one end of the reinforcing ring, and an auxiliary groove is provided on the inner wall of the reinforcing ring.

Description

Technical Field

[0001] This invention mainly relates to the field of ultra-long hydraulic cylinders, specifically to a guiding structure and method for an inner and outer composite guide sleeve for ultra-long hydraulic cylinders. Background Technology

[0002] A typical hydraulic cylinder consists of components such as a piston, guide sleeve, cylinder barrel, and piston rod. Only the piston and guide sleeve serve a guiding function, with support rings or brazing provided on their inner and outer surfaces, respectively. The guide sleeve's supporting force is the sum of the forces acting on the piston and the guide rings, essentially acting as the fulcrum of a lever; therefore, its support is particularly crucial. For hydraulic cylinders with strokes reaching tens of meters or longer, a support ring or brazing is typically added to the space between the cylinder barrel and piston rod to support the guide sleeve.

[0003] During the operation of specific embodiments, the inventors discovered the following defects: However, there are certain limitations in the processing of excessively long guide sleeves. For example, unstable welding can easily cause bending between excessively long guide sleeves, making it impossible for the guide sleeves to operate stably.

[0004] It should be noted that the above content falls within the scope of the inventor's technical knowledge. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art. Summary of the Invention

[0005] 1. The technical problem that the invention aims to solve: This invention provides a guiding structure and method for an inner and outer composite guide sleeve for an ultra-long hydraulic cylinder, in order to solve the technical problems existing in the background art.

[0006] 2. Technical Solution: To achieve the above objectives, the technical solution provided by the present invention is as follows: a guide structure and method for an inner and outer composite guide sleeve for an ultra-long hydraulic cylinder, comprising a first guide sleeve structure, a second guide sleeve structure disposed at the bottom of the first guide sleeve structure, a reinforced guide sleeve structure disposed between the first guide sleeve structure and the second guide sleeve structure, the first guide sleeve structure and the second guide sleeve structure being connected by fixing bolts, and a connecting sealing structure disposed between the first guide sleeve structure and the second guide sleeve structure. The reinforced guide sleeve structure includes a limiting ring, an outer wall of which is provided with a fitting ring, a third threaded groove is provided inside the fitting ring, reinforcing rings are provided at the bottom and top of the limiting ring, a positioning strip is provided on the outer wall of the reinforcing ring, an auxiliary ring is provided at one end of the reinforcing ring, an auxiliary groove is provided on the inner wall of the reinforcing ring, and an O-ring is provided on the inner wall of the auxiliary groove.

[0007] Furthermore, the first guide sleeve structure includes a first connecting ring, a first guide sleeve body is provided at the bottom of the first connecting ring, a positioning groove is provided on the inner wall of the first guide sleeve body, and an installation groove is provided on the inner side of the top of the first connecting ring.

[0008] Furthermore, the first connecting ring has a placement groove inside, the inner wall of the placement groove has a first threaded groove, the top of the first connecting ring has a limiting groove, the outer side of the top of the first connecting ring has a first fitting groove, and the inner side of the first fitting groove has a first sealing groove.

[0009] Furthermore, the second guide sleeve structure includes a second connecting ring, a second guide sleeve body is provided at the top of the second connecting ring, a second threaded groove is provided inside the second connecting ring, a second fitting groove is provided on the outer wall of the second threaded groove, and a limit block is provided at the bottom of the second connecting ring.

[0010] Furthermore, the outer wall of the limiting ring is fitted with the inner wall of the mounting groove, the outer wall of the fitting ring is fitted with the inner wall of the placement groove, and the outer wall of the positioning strip is fitted with the inner wall of the positioning groove.

[0011] Furthermore, the first threaded groove is aligned with the third threaded groove, and the internal threads of the first threaded groove, the third threaded groove, and the limiting block are connected by fixing bolts.

[0012] Furthermore, in the connecting sealing structure, the outer sealing ring has an inner sealing ring on its inner side, and the outer wall of the outer sealing ring is fitted with the second fitting groove and the first fitting groove.

[0013] Furthermore, the outer walls of the reinforcing rings positioned at the top and bottom of the limiting ring are respectively attached to the inner walls of the first guide sleeve body and the second guide sleeve body, and the auxiliary ring is attached to the inner walls of the first guide sleeve body and the second guide sleeve body.

[0014] A method for guiding an ultra-long hydraulic cylinder using an inner and outer composite guide sleeve, which utilizes any one of the inner and outer composite guide sleeve guiding structures for ultra-long hydraulic cylinders, comprises the following steps: S1: Component pretreatment: Check the dimensional accuracy of each part and clean the oil and impurities from the surface of the parts; S2: Reinforced guide sleeve assembly: Precisely install the reinforced guide sleeve structure onto the first guide sleeve structure to form a pre-assembled assembly; S3: Sealing structure arrangement: A connecting sealing structure is placed in the first fitting groove and the first sealing groove of the first guide sleeve structure; S4: Guide sleeve body splicing: Align the pre-assembled parts of the second guide sleeve structure and the first guide sleeve structure to achieve a reinforced fit and positioning of the guide sleeve structure and the second guide sleeve structure; S5: Bolt fixing and locking: The components are connected by fixing bolts to complete the overall structural assembly; S6: Assembly verification: Check the sealing fit, guiding accuracy and structural stability. After passing the inspection, install it into the extra-long hydraulic cylinder. S7: Operation Guidance: When the cylinder is working, the composite guide sleeve structure guides the piston rod to make linear movement through reinforced support and precision guidance, while the sealing structure prevents hydraulic oil leakage.

[0015] 3. Beneficial effects: Compared with the prior art, the technical solution provided by this invention has the following advantages: The present invention uses a reinforced guide sleeve structure installed between the first guide sleeve structure and the second guide sleeve structure. The top and bottom of the reinforced guide sleeve structure are respectively inserted into the inner walls of the first guide sleeve structure and the second guide sleeve structure to strengthen and fix the connection position between the first guide sleeve structure and the second guide sleeve structure. The reinforced guide sleeve structure also limits the first guide sleeve structure and the second guide sleeve structure to prevent them from bending during use. A connecting sealing structure is provided between the first guide sleeve structure and the second guide sleeve structure. After the fixing bolt is installed between the first guide sleeve structure and the second guide sleeve structure, the fixing bolt squeezes the first guide sleeve structure and the second guide sleeve structure, so that the first guide sleeve structure and the second guide sleeve structure squeeze the connecting sealing structure, making the connecting sealing structure fit tightly with the first guide sleeve structure and the second guide sleeve structure. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention; Figure 3 This is a three-dimensional unfolded structural diagram of the second guide sleeve structure of the present invention; Figure 4 This is a three-dimensional cross-sectional view of the first guide sleeve structure of the present invention; Figure 5 This is a three-dimensional structural diagram of the reinforced guide sleeve structure of the present invention.

[0017] Figure label: 1. First guide sleeve structure; 101. First connecting ring; 102. First guide sleeve body; 103. Positioning groove; 104. Mounting groove; 105. Placement groove; 106. First threaded groove; 107. Limiting groove; 108. First fitting groove; 109. First sealing groove; 2. Second guide sleeve structure; 201. Second connecting ring; 202. Second guide sleeve body; 203. Second threaded groove; 204. Second fitting groove; 205. Limiting block; 3. Reinforced guide sleeve structure; 301. Limiting ring; 302. Fitting ring; 303. Third threaded groove; 304. Reinforcing ring; 305. Positioning strip; 306. Auxiliary ring; 307. Auxiliary groove; 308. O-ring; 4. Fixing bolt; 5. Connecting sealing structure; 501. Outer sealing ring; 502. Inner sealing ring. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more complete description of the invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the invention will be more thorough and complete.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "page," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 this invention.

[0020] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In this invention, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] Example See attached document Figure 1-5 A guide structure and method for an inner and outer composite guide sleeve for an ultra-long hydraulic cylinder, comprising a first guide sleeve structure 1, a second guide sleeve structure 2 disposed at the bottom of the first guide sleeve structure 1, a reinforced guide sleeve structure 3 disposed between the first guide sleeve structure 1 and the second guide sleeve structure 2, the first guide sleeve structure 1 and the second guide sleeve structure 2 being connected by a fixing bolt 4, and a connecting sealing structure 5 disposed between the first guide sleeve structure 1 and the second guide sleeve structure 2. The reinforced guide sleeve structure 3 includes a limiting ring 301, an outer wall of which is provided with a fitting ring 302, and an inner surface of the fitting ring 302 having a third threaded groove 303. Reinforcing rings 304 are provided at the bottom and top of the limiting ring 301, and a positioning strip 305 is provided on the outer wall of the reinforcing ring 304. An auxiliary ring 306 is provided at one end of the reinforcing ring 304, and an auxiliary groove 307 is provided on the inner wall of the reinforcing ring 304. An O-ring 308 is provided on the inner wall of the auxiliary groove 307. The outer wall of the limiting ring 301 fits against the inner wall of the mounting groove 104, the outer wall of the fitting ring 302 fits against the inner wall of the placement groove 105, and the outer wall of the positioning strip 305 fits against the inner wall of the positioning groove 103. The outer walls of the reinforcing rings 304 at the top and bottom of ring 301 are respectively attached to the inner walls of the first guide sleeve body 102 and the second guide sleeve body 202. The auxiliary ring 306 is attached to the inner walls of the first guide sleeve body 102 and the second guide sleeve body 202. The limiting ring 301 is installed on the inner wall of the mounting groove 104, and the fitting ring 302 on the outer wall of the limiting ring 301 is attached to the inner wall of the placement groove 105 to limit the position of the limiting ring 301. At the same time, the reinforcing ring 304 at the bottom of the limiting ring 301 is inserted into the interior of the first guide sleeve body 102. The positioning strip 305 on the outer wall of the reinforcing ring 304 is inserted into the inner wall of the positioning groove 103 to limit the reinforcing ring 304. Then, the second guide sleeve structure 2 is installed on the top of the first guide sleeve structure 1.

[0023] Furthermore, the first guide sleeve structure 1 includes a first connecting ring 101, a first guide sleeve body 102 is provided at the bottom of the first connecting ring 101, a positioning groove 103 is provided on the inner wall of the first guide sleeve body 102, an installation groove 104 is provided on the inner side of the top of the first connecting ring 101, a placement groove 105 is provided inside the first connecting ring 101, a first threaded groove 106 is provided on the inner wall of the placement groove 105, a limiting groove 107 is provided on the top of the first connecting ring 101, a first fitting groove 108 is provided on the outer side of the top of the first connecting ring 101, and a first sealing groove 109 is provided on the inner side of the first fitting groove 108. The placement groove 105 and the fitting ring 302 cooperate with each other to limit the position of the limiting ring 301.

[0024] Furthermore, the second guide sleeve structure 2 includes a second connecting ring 201, a second guide sleeve body 202 at the top of the second connecting ring 201, a second threaded groove 203 inside the second connecting ring 201, a second fitting groove 204 on the outer wall of the second threaded groove 203, and a limiting block 205 at the bottom of the second connecting ring 201. The second connecting ring 201 is installed on the top of the first connecting ring 101, and the second connecting ring 201 is aligned with the first connecting ring 101. The inner wall of the second guide sleeve body 202 fits against the outer wall of the reinforcing ring 304, thereby realizing the installation of the reinforced guide sleeve structure 3 between the first guide sleeve structure 1 and the second guide sleeve structure 2. Then, the second threaded groove 203 at the bottom of the second connecting ring 201 is inserted into the limiting groove 107, thereby realizing secondary limiting between the first guide sleeve structure 1 and the second guide sleeve structure 2.

[0025] Furthermore, the first threaded groove 106 is aligned with the third threaded groove 303. The first threaded groove 106, the third threaded groove 303 and the limiting block 205 are internally threaded with fixing bolts 4. After the first guide sleeve structure 1, the second guide sleeve structure 2 and the reinforced guide sleeve structure 3 are installed, the fixing bolts 4 are inserted into the inner walls of the second threaded groove 203, the third threaded groove 303, the placement groove 105 and the first threaded groove 106 to fix the first guide sleeve structure 1, the second guide sleeve structure 2 and the reinforced guide sleeve structure 3.

[0026] Furthermore, in the connecting sealing structure 5, the outer sealing ring 501 has an inner sealing ring 502 on its inner side. The outer wall of the outer sealing ring 501 is fitted with the second fitting groove 204 and the first fitting groove 108. Then, during the process of fixing the first guide sleeve structure 1, the second guide sleeve structure 2, and the reinforced guide sleeve structure 3 by inserting the fixing bolt 4 into the inner wall of the second threaded groove 203, the third threaded groove 303, the placement groove 105, and the first threaded groove 106, the first guide sleeve structure 1 and the second guide sleeve structure 2 compress the outer sealing ring 501 and the inner sealing ring 502, so that the inner sealing ring 502 and the outer sealing ring 501 are compressed with the second fitting groove 204, the first fitting groove 108, and the first sealing groove 109, thereby achieving a seal at the connection position.

[0027] A method for guiding an ultra-long hydraulic cylinder using an inner and outer composite guide sleeve, which utilizes any one of the inner and outer composite guide sleeve guiding structures for ultra-long hydraulic cylinders, comprises the following steps: S1: Component pretreatment: Check the dimensional accuracy of each part and clean the oil and impurities from the surface of the parts; S2: Reinforced guide sleeve assembly: Precisely install the reinforced guide sleeve structure 3 onto the first guide sleeve structure 1 to form a pre-assembled body; S3: Sealing structure arrangement: A connecting sealing structure 5 is placed in the first fitting groove 108 and the first sealing groove 109 of the first guide sleeve structure 1; S4: Guide sleeve body splicing: Align the pre-assembled parts of the second guide sleeve structure 2 and the first guide sleeve structure 1 to achieve the fitting and positioning of the reinforced guide sleeve structure 3 and the second guide sleeve structure 2. S5: Bolt fixing and locking: The components are connected by fixing bolts 4 to complete the overall structural assembly; S6: Assembly verification: Check the sealing fit, guiding accuracy and structural stability. After passing the inspection, install it into the extra-long hydraulic cylinder. S7: Operation Guidance: When the cylinder is working, the composite guide sleeve structure guides the piston rod to make linear movement through reinforced support and precision guidance, while the sealing structure prevents hydraulic oil leakage.

[0028] Component inspection and cleaning: Perform dimensional verification and surface cleaning on the first guide sleeve structure 1, the second guide sleeve structure 2, the reinforced guide sleeve structure 3, the fixing bolts 4, and the connecting sealing structure 5 to ensure that there are no burrs, oil stains, or dimensional deviations. S7: Reinforcing guide sleeve and first guide sleeve assembly: The limiting ring 301 of the reinforcing guide sleeve structure 3 is embedded into the mounting groove 104 of the first guide sleeve structure 1, so that the fitting ring 302 is tightly fitted with the inner wall of the placement groove 105. At the same time, the reinforcing ring 304 is inserted into the first guide sleeve body 102 to ensure that the positioning strip 305 is completely inserted into the positioning groove 103, thus completing the pre-fixing. Sealing structure installation: Place the outer sealing ring 501 of the connecting sealing structure 5 in the first fitting groove 108 of the first guide sleeve structure 1, and embed the inner sealing ring 502 into the first sealing groove 109 to ensure that the sealing ring is not twisted or offset. Second guide sleeve splicing with pre-assembly: Align the second connecting ring 201 of the second guide sleeve structure 2 with the first connecting ring 101, so that the limiting block 205 is embedded in the limiting groove 107, and the inner wall of the second guide sleeve body 202 is tightly fitted with the reinforcing ring 304 and the auxiliary ring 306, while ensuring that the first thread groove 106, the third thread groove 303 and the second thread groove 203 are coaxially aligned. Bolt tightening and fixing: The fixing bolt 4 is passed through the second thread groove 203, the third thread groove 303 and the first thread groove 106 in sequence, and tightened according to the specified torque, so that the first guide sleeve structure 1 and the second guide sleeve structure 2 are squeezed and connected to the sealing structure 5, so that the sealing surface is tightly fitted. Assembly verification and cylinder installation: After checking the overall straightness and coaxiality of the guide sleeve with a dial indicator and confirming that there is no leakage, the composite guide sleeve guide structure is installed between the cylinder barrel and piston rod of the extra-long cylinder. When the cylinder is working, the piston rod can achieve stable linear movement by strengthening the support and limiting of the guide sleeve structure 3 and guiding the guide sleeve body.

[0029] The above-described embodiments are merely illustrative of certain implementations of the present invention, and are described in a relatively specific and detailed manner. However, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A guide structure with inner and outer composite guide sleeves for ultra-long hydraulic cylinders, characterized in that: include A first guide sleeve structure (1) is provided at the bottom of the first guide sleeve structure (1), a second guide sleeve structure (2) is provided at the bottom of the first guide sleeve structure (1), a reinforcing guide sleeve structure (3) is provided between the first guide sleeve structure (1) and the second guide sleeve structure (2), the first guide sleeve structure (1) and the second guide sleeve structure (2) are connected by a fixing bolt (4), and a connecting sealing structure (5) is provided between the first guide sleeve structure (1) and the second guide sleeve structure (2). The reinforced guide sleeve structure (3) includes a limiting ring (301), the outer wall of the limiting ring (301) is provided with a fitting ring (302), the inner side of the fitting ring (302) is provided with a third threaded groove (303), the bottom and top of the limiting ring (301) are provided with reinforcing rings (304), the outer wall of the reinforcing ring (304) is provided with a positioning strip (305), one end of the reinforcing ring (304) is provided with an auxiliary ring (306), the inner wall of the reinforcing ring (304) is provided with an auxiliary groove (307), and the inner wall of the auxiliary groove (307) is provided with an O-ring (308).

2. The inner and outer composite guide sleeve guiding structure for an ultra-long hydraulic cylinder according to claim 1, characterized in that: The first guide sleeve structure (1) includes a first connecting ring (101), a first guide sleeve body (102) is provided at the bottom of the first connecting ring (101), a positioning groove (103) is provided on the inner wall of the first guide sleeve body (102), and an installation groove (104) is provided on the inner side of the top of the first connecting ring (101).

3. The inner and outer composite guide sleeve guiding structure for an ultra-long hydraulic cylinder according to claim 2, characterized in that: The first connecting ring (101) has a placement groove (105) inside, the inner wall of the placement groove (105) has a first threaded groove (106), the top of the first connecting ring (101) has a limiting groove (107), the outer side of the top of the first connecting ring (101) has a first fitting groove (108), and the inner side of the first fitting groove (108) has a first sealing groove (109).

4. The inner and outer composite guide sleeve guiding structure for an ultra-long hydraulic cylinder according to claim 1, characterized in that: The second guide sleeve structure (2) includes a second connecting ring (201), a second guide sleeve body (202) is provided on the top of the second connecting ring (201), a second threaded groove (203) is provided inside the second connecting ring (201), a second fitting groove (204) is provided on the outer wall of the second threaded groove (203), and a limit block (205) is provided at the bottom of the second connecting ring (201).

5. The inner and outer composite guide sleeve guiding structure for an ultra-long hydraulic cylinder according to claim 1, characterized in that: The outer wall of the limiting ring (301) is in contact with the inner wall of the mounting groove (104), the outer wall of the fitting ring (302) is in contact with the inner wall of the placement groove (105), and the outer wall of the positioning strip (305) is in contact with the inner wall of the positioning groove (103).

6. The inner and outer composite guide sleeve guiding structure for an ultra-long hydraulic cylinder according to claim 1, characterized in that: The first threaded groove (106) is aligned with the third threaded groove (303), and the internal threads of the first threaded groove (106), the third threaded groove (303) and the limiting block (205) are connected by fixing bolts (4).

7. The inner and outer composite guide sleeve guiding structure for an ultra-long hydraulic cylinder according to claim 1, characterized in that: The connecting sealing structure (5) includes an outer sealing ring (501), an inner sealing ring (502) is provided on the inner side of the outer sealing ring (501), and the outer wall of the outer sealing ring (501) is fitted with the second fitting groove (204) and the first fitting groove (108).

8. The inner and outer composite guide sleeve guiding structure for an ultra-long hydraulic cylinder according to claim 1, characterized in that: The outer walls of the reinforcing rings (304) at the top and bottom of the limiting ring (301) are respectively attached to the inner walls of the first guide sleeve body (102) and the second guide sleeve body (202), and the auxiliary ring (306) is attached to the inner walls of the first guide sleeve body (102) and the second guide sleeve body (202).

9. A method for guiding an inner and outer composite guide sleeve for an ultra-long hydraulic cylinder, which utilizes the inner and outer composite guide sleeve guiding structure for an ultra-long hydraulic cylinder as described in any one of claims 1-8, comprising the following steps: S1: Component pretreatment: Check the dimensional accuracy of each part (such as the thread matching degree of 106, 203, and 303 thread grooves, and the roughness Ra of the mating surface ≤ 0.8μm), and clean the oil and impurities on the surface of the parts; S2: Reinforced guide sleeve assembly: The reinforced guide sleeve structure (3) is precisely installed onto the first guide sleeve structure (1) to form a pre-assembled body; S3: Sealing structure arrangement: A connecting sealing structure (5) is placed in the first fitting groove (108) and the first sealing groove (109) of the first guide sleeve structure (1); S4: Guide sleeve body splicing: Align the pre-assembled parts of the second guide sleeve structure (2) and the first guide sleeve structure (1) to achieve the fitting and positioning of the reinforced guide sleeve structure (3) and the second guide sleeve structure (2); S5: Bolt fixing and locking: The components are connected through the fixing bolts (4) to complete the overall structural assembly; S6: Assembly verification: Check the sealing fit, guiding accuracy and structural stability. After passing the inspection, install it into the extra-long hydraulic cylinder. S7: Operation Guidance: When the cylinder is working, the composite guide sleeve structure guides the piston rod to make linear movement through reinforced support and precision guidance, while the sealing structure prevents hydraulic oil leakage.

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