A kind of auxiliary tool for oil cylinder disassembly

Abstract

This invention discloses an auxiliary tool for disassembling hydraulic cylinders, belonging to the technical field of hydraulic cylinder disassembly auxiliary equipment. It includes a hydraulic cylinder, a positioning arm, a base plate, and a jack. The positioning arm is installed on both sides of the cylinder's tail. The base plate is fitted onto the positioning arm and can be adjusted and positioned on it. The jack is engaged with the side of the base plate. A connecting platform and a positioning post are provided on the side of the hydraulic cylinder, with threaded holes on the connecting platform. The positioning arm includes a longitudinal rod, one end of which has a connector with a positioning groove. A connecting plate with a through groove is fixedly connected to the side of the connector. The base plate has a through window, a pin hole, and a locking groove, and its position is defined by a pin engaging with the adjustment hole on the longitudinal rod. This auxiliary tool can form a stable fit with the hydraulic cylinder and can be adjusted and positioned according to the disassembly location, allowing the jack to apply a pushing force to the hydraulic cylinder assembly, thus achieving safe disassembly of the hydraulic cylinder.

Description

Technical Field

[0001] This invention belongs to the technical field of hydraulic cylinder disassembly auxiliary equipment, specifically relating to an auxiliary tool for hydraulic cylinder disassembly. Background Technology

[0002] Hydraulic cylinders, as common actuators in hydraulic systems, are widely used in engineering machinery, mining equipment, metallurgical equipment, marine equipment, and other hydraulic transmission devices. After long-term operation, hydraulic cylinders often need to be disassembled due to requirements such as maintenance, seal replacement, internal component repair, or scrapping. Especially when there is a tight fit between the piston rod and cylinder barrel, or between the cylinder head and cylinder barrel, disassembly often requires the use of external tools to apply significant separation force to complete the disassembly of the corresponding components.

[0003] In existing hydraulic cylinder disassembly operations, the common method is to use general-purpose jacking equipment or other external force-bearing devices for assisted disassembly. However, due to the diverse specifications of hydraulic cylinder bodies, it is often difficult to quickly adjust and stably match the force position, force direction, and support relationship during disassembly. This makes it difficult for the disassembly auxiliary device to form a well-suited assembly relationship with the hydraulic cylinder during use, thereby affecting the stable transmission of the jacking force.

[0004] Therefore, the core problem that exists in the existing technology is that there is a lack of an auxiliary tool that can form a stable fit with the hydraulic cylinder and is easy to adjust and position according to the disassembly location for hydraulic cylinder disassembly operations, which can easily affect the operational stability and disassembly safety during the disassembly process. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of this invention is to provide an auxiliary tool for disassembling hydraulic cylinders, which can solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An auxiliary tool for disassembling a hydraulic cylinder includes a hydraulic cylinder, a positioning arm, a base plate, and a jack. The positioning arm is installed on both sides of the tail of the hydraulic cylinder. The base plate is fitted onto the positioning arm and can be adjusted and limited in position on the positioning arm. The jack is engaged with the side of the base plate. The jack is used to apply a pushing force to the hydraulic cylinder assembly to separate the interference fit between the piston rod and the cylinder barrel, or between the cylinder head and the cylinder barrel, thereby realizing the disassembly of the hydraulic cylinder.

[0007] Furthermore, the side of the cylinder is provided with a connecting platform and a positioning post, and the connecting platform is provided with threaded holes at equal intervals along its length.

[0008] Furthermore, the positioning arm includes a longitudinal rod, and the side of the longitudinal rod is provided with adjustment holes at equal intervals along its length.

[0009] Furthermore, one end of the longitudinal rod is provided with a connector, and one end of the connector is provided with a positioning groove that is compatible with the positioning post.

[0010] Furthermore, a connecting plate is fixedly connected to the side of the connector, and a through groove is formed on the connecting plate.

[0011] Furthermore, when the positioning arm is installed on the hydraulic cylinder, the positioning pin is inserted into the positioning groove, the connecting plate is attached to the connecting platform, and the positioning arm is fixed to the hydraulic cylinder by screws that pass through the through groove and are connected in the threaded hole.

[0012] Furthermore, the base plate has symmetrical through windows on its side, and a pin hole is formed at the top of the through window, into which a pin is inserted. When the base plate is installed on the positioning arm, the longitudinal rod passes through the through window, and the pin is inserted into the pin hole and the adjustment hole to limit the position of the base plate on the positioning arm.

[0013] Furthermore, the side of the base plate is provided with a locking groove, and the jack is connected to the locking groove by a locking mechanism.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention installs positioning arms on both sides of the cylinder tail and uses the cooperation of positioning pins and positioning grooves to achieve initial positioning. The connection between the positioning arms and the cylinder is achieved through the fit of the connecting plate and the connecting platform, and the connection of screws and threaded holes. This allows auxiliary tools to be directly placed on the cylinder body, avoiding unstable fit between the auxiliary structure and the cylinder during disassembly. Simultaneously, a base plate is fitted onto the positioning arms, and the position is defined by the insertion of pins between the pin holes and adjustment holes. This allows the base plate to be adjusted according to the disassembly position before being fixed, thus enabling the jack's installation position to be matched and adjusted according to disassembly requirements. Furthermore, the jack is connected to the side of the base plate via a snap-fit ​​mechanism. The jack's thrust can be stably transmitted to the cylinder assembly through the base plate and positioning arms, thereby gradually achieving the separation of the interference fit between the piston rod and cylinder barrel, or between the cylinder head and cylinder barrel, during disassembly. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the hydraulic cylinder of the present invention; Figure 3 This is a schematic diagram of the positioning arm of the present invention; Figure 4 This is a schematic diagram of the structure of the base plate of the present invention.

[0016] The attached diagram lists the components represented by each number as follows: 1. Hydraulic cylinder; 11. Connecting platform; 111. Threaded hole; 12. Positioning pin; 2. Positioning arm; 21. Longitudinal rod; 211. Adjustment hole; 22. Connector; 221. Positioning groove; 23. Connecting plate; 231. Through groove; 3. Base plate; 31. Through window; 311. Pin hole; 32. Locking slot; 33. Pin; 4. Jack. Detailed Implementation

[0017] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention. Example 1

[0018] See Figures 1 to 4 An auxiliary tool for disassembling hydraulic cylinders includes a hydraulic cylinder 1, a positioning arm 2, a base plate 3, and a jack 4. The hydraulic cylinder 1 has a connecting platform 11 and a positioning post 12 on its side. The connecting platform 11 has threaded holes 111 evenly spaced along its length. The positioning arm 2 is installed on both sides of the tail of the hydraulic cylinder 1. The positioning arm 2 includes a longitudinal rod 21, one end of which has a connector 22. One end of the connector 22 has a positioning groove 221. A connecting plate 23 is fixedly connected to the side of the connector 22, and a through groove 231 is formed through the connecting plate 23. The base plate 3 is fitted onto the positioning arm 2. Symmetrical through windows 31 are formed on the side of the base plate 3. A pin hole 311 is formed at the top of the through window 31, and a pin 33 is inserted into the pin hole 311. A locking groove 32 is also provided on the side of the base plate 3. The jack 4 is connected to the locking groove 32 by a locking mechanism. The above structures together constitute the overall structure of the auxiliary tool for disassembling the hydraulic cylinder. The positioning arm 2 is used to establish an assembly relationship with the hydraulic cylinder 1, the base plate 3 is used to form an adjustable mounting part on the positioning arm 2, and the jack 4 is used to establish a pushing action relationship on the base plate 3, thereby meeting the needs of adjusting the force position and stabilizing the pushing action in the hydraulic cylinder disassembly operation.

[0019] See Figure 1 , Figure 2 and Figure 3During the disassembly of the hydraulic cylinder, the positioning arms 2 on both sides are first installed to their corresponding positions on both sides of the tail of the hydraulic cylinder 1. During installation, the connector 22 is positioned facing the side of the hydraulic cylinder 1, and the positioning groove 221 on the connector 22 is aligned with the positioning post 12 on the hydraulic cylinder 1. The positioning post 12 is then inserted into the positioning groove 221, thus completing the initial positioning of the positioning arm 2 relative to the hydraulic cylinder 1. The connecting plate 23 is brought close to the connecting platform 11 along with the connector 22, and is then fitted against the outer surface of the connecting platform 11. Next, screws are passed through the through groove 231 and screwed into the corresponding threaded hole 111. Through the cooperation between the connecting plate 23, the through groove 231, and the threaded hole 111, the positioning arm 2 is fixedly installed on the outside of the hydraulic cylinder 1. Since the connecting platform 11 is provided with multiple threaded holes 111 distributed along the length direction, and the connecting plate 23 is provided with through grooves 231, when the positioning arm 2 is installed to the oil cylinder 1, the corresponding installation position can be selected according to the needs of the disassembly part, so as to provide a matching installation foundation for the subsequent installation of the base plate 3 and the jack 4.

[0020] See Figure 1 , Figure 3 and Figure 4 After the positioning arm 2 is installed, the base plate 3 is then fitted onto the positioning arms 2 on both sides. During installation, the longitudinal rods 21 on both sides of the positioning arm 2 pass through the through-holes 31 on both sides of the base plate 3, thus placing the base plate 3 between the two positioning arms 2. After the base plate 3 moves along the length of the longitudinal rod 21, it can be adjusted according to the actual force position during the disassembly of the hydraulic cylinder. After the base plate 3 moves to the target position, the pin 33 is inserted into the pin hole 311, and then the pin 33 is further inserted into the adjustment hole 211 corresponding to the current position. The pin 33 engages with the pin hole 311 and the adjustment hole 211, thereby fixing the base plate 3 at the corresponding position on the longitudinal rod 21. Since multiple adjustment holes 211 are evenly spaced along the length of the longitudinal rod 21, the base plate 3 can be installed and fixed at multiple positions to adapt to the operational requirements of different hydraulic cylinder disassembly positions.

[0021] See Figure 1 and Figure 4After the base plate 3 is positioned, the jack 4 is installed on the locking groove 32 on the side of the base plate 3. The jack 4 is connected to the locking groove 32 by a snap-fit ​​mechanism, thus being installed on the side of the base plate 3. After the above installation is completed, a complete disassembly auxiliary assembly relationship is formed between the cylinder 1, the positioning arm 2, the base plate 3, and the jack 4. Then, the jack 4 is operated to perform a jacking operation. The jack 4 forms a jacking support on the base plate 3. The base plate 3 maintains its installation position through the cooperation between the pin 33 and the longitudinal rod 21. The positioning arm 2 maintains its connection with the cylinder 1 through the cooperation between the connector 22, the connecting plate 23, the positioning column 12, and the connecting platform 11 on the cylinder 1. This allows the jacking force applied by the jack 4 to be stably transmitted to the cylinder assembly. During the continuous jacking process, the interference fit between the piston rod and the cylinder barrel, or between the cylinder head and the cylinder barrel, is gradually separated, thus completing a typical cylinder disassembly process. The above-described implementation addresses the problems of difficulty in matching force positions and unstable assembly of auxiliary devices in existing disassembly operations. It establishes an overall disassembly auxiliary relationship by directly assembling with the hydraulic cylinder 1, enabling the installation, adjustment, and jacking operations to be completed sequentially during the disassembly process. Example 2

[0022] See Figures 1 to 3 This embodiment further explains the installation structure and mating relationship between the positioning arm 2 and the hydraulic cylinder 1. The hydraulic cylinder 1, as the object to be disassembled, has a connecting platform 11 and a positioning post 12 on its side. The connecting platform 11 has multiple threaded holes 111 evenly spaced along its length. The positioning arm 2 is located on both sides of the tail of the hydraulic cylinder 1. The positioning arm 2 includes a longitudinal rod 21, a connecting head 22, and a connecting plate 23. The connecting head 22 is located at one end of the longitudinal rod 21, a positioning groove 221 is formed at one end of the connecting head 22, and the connecting plate 23 is fixedly connected to the side of the connecting head 22. A through groove 231 is formed through the connecting plate 23. The above structure constitutes the installation interface between the positioning arm 2 and the hydraulic cylinder 1. The positioning groove 221 and the positioning post 12 form a positioning fit, the connecting plate 23 and the connecting platform 11 form a close fit, and the through groove 231 and the threaded holes 111 form a screw installation fit.

[0023] See Figure 2 and Figure 3When installing the positioning arm 2 onto the cylinder 1, first move the connector 22 to the position of the positioning post 12, and embed the positioning post 12 into the positioning groove 221. The cooperation between the positioning post 12 and the positioning groove 221 ensures that the positioning arm 2 is positioned relative to the cylinder 1 in the initial stage of installation, preventing the positioning arm 2 from shifting its installation position before the screws are installed. After positioning is completed, the connecting plate 23 is placed against the surface of the connecting platform 11, and the through groove 231 corresponds to the threaded hole 111 on the connecting platform 11. The screw passes through the through groove 231 and is screwed into the threaded hole 111, thereby fixing the connecting plate 23 onto the connecting platform 11. Since the through groove 231 is a through structure and the connecting platform 11 has multiple threaded holes 111, the installation position of the positioning arm 2 on the cylinder 1 can be selected and adapted along the length of the connecting platform 11, allowing the positioning arm 2 to be installed in the corresponding part of the cylinder 1 according to the specific disassembly position.

[0024] See Figure 1 and Figure 3 The longitudinal rod 21 extends outward from the connector 22, serving both as the through-fitting part of the base plate 3 and as the basis for adjusting the position of the base plate 3. Multiple adjustment holes 211 are evenly spaced along the length of the longitudinal rod 21, each used to form an insertion fit with the pin 33. In this embodiment, after the positioning arm 2 is installed with the hydraulic cylinder 1, the longitudinal rod 21 extends outward to form a support section for the base plate 3 to be installed. Thus, the positioning arm 2 not only serves as the connection with the hydraulic cylinder 1 but also guides and transmits force during the adjustment and installation of the base plate 3, enabling the subsequent installation of the base plate 3 and the jack 4 to be based on the auxiliary structure directly connected to the hydraulic cylinder 1. Example 3

[0025] See Figure 1 , Figure 3 and Figure 4 This embodiment further explains the adjustment and limiting structure between the base plate 3 and the positioning arm 2, as well as the installation relationship of the jack 4. The base plate 3 is positioned between the two positioning arms 2. Two through windows 31 are symmetrically opened on the side of the base plate 3, each allowing the corresponding longitudinal rod 21 to pass through. A pin hole 311 is provided at the top of the through window 31, and a pin 33 is inserted into the pin hole 311. The side of the base plate 3 is also provided with a locking groove 32, which is used to form a locking connection with the jack 4. The above structure enables the base plate 3 to simultaneously perform the functions of through installation, position limitation, and installation of the jack 4.

[0026] See Figure 3 and Figure 4During the installation of the base plate 3, the base plate 3 is moved between the two longitudinal bars 21, and the two longitudinal bars 21 pass through the corresponding through windows 31. Since the through windows 31 are through structures, the base plate 3 can move along the length of the longitudinal bars 21. After adjusting the position of the base plate 3 according to the pushing position required during the disassembly of the hydraulic cylinder, the pin 33 is inserted into the pin hole 311, and then the pin 33 continues to enter the corresponding adjustment hole 211. After the pin 33 is inserted, a plug-in limiting relationship is formed between the base plate 3 and the longitudinal bars 21, thereby limiting the position of the base plate 3 on the longitudinal bars 21. Through the selective corresponding cooperation between the multiple adjustment holes 211 and the pin holes 311, the base plate 3 can be locked at different positions, thereby adjusting the installation position of the jack 4 accordingly.

[0027] See Figure 1 and Figure 4 After the base plate 3 is installed and its position defined, the jack 4 is installed in the locking slot 32. The jack 4 is connected to the locking slot 32 by a snap-fit ​​mechanism. After the jack 4 is installed, its installation position is determined by the base plate 3. The installation position of the base plate 3 is determined by the longitudinal rod 21, the adjusting hole 211, the pin hole 311, and the pin 33. The spatial position of the longitudinal rod 21 is determined by the installation relationship between the positioning arm 2 and the hydraulic cylinder 1, thus forming a continuous assembly relationship consisting of the hydraulic cylinder 1, the positioning arm 2, the base plate 3, and the jack 4.

[0028] During actual disassembly, when the jack 4 pushes, the locking groove 32 serves to hold the jack 4 in place, the base plate 3 provides load support for the jack 4, the pin 33 limits the position of the base plate 3, the longitudinal rod 21 guides and supports the base plate 3, and the connecting head 22, positioning groove 221, connecting plate 23, and through groove 231, respectively, cooperate with the positioning post 12, connecting platform 11, and threaded hole 111 to fix the positioning arm 2 in place. Through the step-by-step cooperation of the above structures, the pushing force applied by the jack 4 can be stably established during the disassembly operation, allowing the cylinder assembly to gradually separate under continuous force. The above implementation method focuses on the operational scenario where the force position needs to be adjusted and the disassembly auxiliary structure needs to be stably assembled, and further details the adjustment and installation relationship of the base plate 3 and the installation and support relationship of the jack 4.

[0029] The working principle of this invention is as follows: In use, first install the positioning arms 2 on both sides of the tail of the cylinder 1. During installation, first bring the connectors 22 on each positioning arm 2 close to the side of the cylinder 1, and make the positioning grooves 221 on the connectors 22 correspond to the positioning pins 12 on the cylinder 1. Then insert the positioning pins 12 into the positioning grooves 221 to form a preliminary positioning. Next, make the connecting plate 23 fit against the connecting platform 11, and make the screw pass through the through groove 231 on the connecting plate 23 and connect to the threaded hole 111 on the connecting platform 11. The positioning arms 2 are fixed on the cylinder 1 by the screws in conjunction with the connecting platform 11, the through groove 231 and the threaded hole 111, so that the positioning arms 2 are stably installed on the outside of the cylinder 1.

[0030] After the positioning arm 2 is installed, the base plate 3 is installed on both sides of the positioning arm 2. During the installation process, the longitudinal rod 21 on the positioning arm 2 passes through the through window 31 on both sides of the base plate 3, so that the base plate 3 is fitted onto the positioning arm 2. Then, according to the position required during disassembly, the base plate 3 is adjusted along the length of the longitudinal rod 21 to move the base plate 3 to a suitable position. After the position of the base plate 3 is adjusted, the pin 33 is inserted into the pin hole 311 and simultaneously inserted into the corresponding adjustment hole 211. The cooperation between the pin hole 311 and the adjustment hole 211 is used to limit the position of the base plate 3 on the positioning arm 2 to ensure the positional stability of the base plate 3 during subsequent stress.

[0031] Subsequently, the jack 4 is installed on the locking groove 32 on the side of the base plate 3. The jack 4 is fixed to one side of the base plate 3 by engaging with the locking groove 32, thereby forming an installation support relationship for the jack 4 with the help of the base plate 3 and the positioning arm 2, so that the jack 4 can apply a pushing force to the cylinder assembly during the disassembly process.

[0032] Next, the jack 4 is operated to push; during the pushing process, the jack 4 is installed on the side of the base plate 3. The position of the base plate 3 is defined by the pin 33, the pin hole 311 and the adjustment hole 211. The positioning arm 2 is fixed on the oil cylinder 1 by the connection head 22, the connecting plate 23 and the positioning column 12, the connecting platform 11 and the threaded hole 111 on the oil cylinder 1. Therefore, the pushing action generated by the jack 4 can be applied to the oil cylinder assembly through the base plate 3 and the positioning arm 2, so that the interference fit between the piston rod and the cylinder or the cylinder head and the cylinder gradually separates under the continuous pushing action.

[0033] During the gradual separation of the interference fit, the engagement of the positioning pin 12 and the positioning groove 221 is used to assist in positioning the positioning arm 2 on the cylinder 1. The close connection between the connecting plate 23 and the connecting platform 11 is used to ensure the stability of the positioning arm 2 installation. The engagement of the longitudinal rod 21 and the through window 31 is used to realize the fitting and position adjustment of the base plate 3. The engagement of the pin 33 with the pin hole 311 and the adjustment hole 211 is used to lock the adjusted position. The locking groove 32 is used to lock the jack 4. Thus, in a typical disassembly process, the installation of the positioning arm 2 is completed first, then the fitting, adjustment and limitation of the base plate 3 are completed, then the locking installation of the jack 4 is completed, and finally the safe disassembly of the cylinder 1 is achieved by the pushing action of the jack 4.

[0034] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. An auxiliary tool for disassembling a hydraulic cylinder, comprising a hydraulic cylinder (1), a positioning arm (2), a base plate (3), and a jack (4), characterized in that: The positioning arm (2) is installed on both sides of the tail of the cylinder (1). The base plate (3) is sleeved on the positioning arm (2) and can be adjusted and limited on the positioning arm (2). The jack (4) is engaged and connected to the side of the base plate (3). The jack (4) is used to apply a pushing force to the cylinder assembly so that the interference fit between the piston rod and the cylinder or the cylinder head and the cylinder is separated, thereby realizing the disassembly of the cylinder (1).

2. The auxiliary tool for disassembling hydraulic cylinders according to claim 1, characterized in that: The side of the cylinder (1) is provided with a connecting platform (11) and a positioning post (12). The connecting platform (11) is provided with threaded holes (111) at equal intervals along its length.

3. The auxiliary tool for disassembling hydraulic cylinders according to claim 2, characterized in that: The positioning arm (2) includes a longitudinal rod (21), and the side of the longitudinal rod (21) is provided with adjustment holes (211) at equal intervals along its length.

4. The auxiliary tool for disassembling hydraulic cylinders according to claim 3, characterized in that: One end of the longitudinal rod (21) is provided with a connector (22), and one end of the connector (22) is provided with a positioning groove (221) that is adapted to the positioning post (12).

5. An auxiliary tool for disassembling hydraulic cylinders according to claim 4, characterized in that: A connecting plate (23) is fixedly connected to the side of the connector (22), and a through groove (231) is provided on the connecting plate (23).

6. The auxiliary tool for disassembling hydraulic cylinders according to claim 5, characterized in that: When the positioning arm (2) is installed on the oil cylinder (1), the positioning pin (12) is inserted into the positioning groove (221), the connecting plate (23) is attached to the connecting platform (11), and the positioning arm (2) is fixed on the oil cylinder (1) by screws that pass through the through groove (231) and are connected in the threaded hole (111).

7. An auxiliary tool for disassembling hydraulic cylinders according to claim 3, characterized in that: The base plate (3) has symmetrical through windows (31) on its side, and a pin hole (311) is provided at the top of the through window (31). A pin (33) is inserted into the pin hole (311). When the base plate (3) is installed on the positioning arm (2), the longitudinal rod (21) passes through the through window (31) and the pin (33) is inserted into the pin hole (311) and the adjustment hole (211) to limit the position of the base plate (3) on the positioning arm (2).

8. The auxiliary tool for disassembling hydraulic cylinders according to claim 1, characterized in that: The base plate (3) has a slot (32) on its side, and the jack (4) is connected to the slot (32) by a snap-fit ​​mechanism.

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