Coupler press fitting tool

Abstract

The utility model relates to the technical field of hydraulic pressure, and discloses a coupler press-fitting tool which comprises a coupler and a transmission shaft, and the coupler is used for being arranged on the transmission shaft in a sleeved mode. The pressing cylinder assembly is used for pushing the coupler to move in the axial direction of the transmission shaft so that the coupler can be arranged on the transmission shaft in a sleeving mode. The pressing cylinder assembly comprises an inner cylinder, an outer cylinder and a locking assembly, and the outer cylinder is movably arranged on the inner cylinder in a sleeving mode so as to adjust the extending length of the inner cylinder; the locking assembly is connected with the inner cylinder and the outer cylinder and used for locking the position of the outer cylinder on the inner cylinder. The outer cylinder is used for abutting against the coupler and pushing the coupler to move, and the inner cylinder is used for abutting against the transmission shaft in the moving process of the coupler so as to limit the moving distance of the coupler. The outer cylinder is movably sleeved on the inner cylinder, an operator is allowed to accurately adjust the height difference (namely the extension length of the inner cylinder) between the inner cylinder and the outer cylinder according to actual conditions, and the coupler is ensured to be accurately pressed into a preset position on a transmission shaft in a press fitting process.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pressure, in particular to a coupling press-fitting tool. Background Art

[0002] In rail vehicle manufacturing and maintenance, the gearbox, a core component of the drive system, has a performance and reliability that directly impacts vehicle efficiency and safety. The input shaft coupling, a key component connecting the motor and the gearbox, is crucial for transmitting torque and ensuring smooth power delivery. Therefore, proper coupling installation is crucial for the stable operation of the entire drive system.

[0003] Traditionally, the installation of couplings has relied on direct hammering or more basic press-fitting tools. However, facing the high-precision and high-torque transmission requirements of modern rail vehicles for couplings, these traditional installation methods are clearly not accurate and effective enough. In particular, for couplings and input shafts that adopt a tapered fit design, the tapered fit is designed to achieve a tight, gap-free connection between the coupling and the input shaft through the simultaneous action of radial expansion and axial pressure, thereby ensuring efficient and stable torque transmission. Because the coupling is pressed in a step-by-step manner during the press-fit process, its press-in depth (i.e., press-in distance) becomes a key factor affecting the installation quality. Pressing in too shallowly may result in a loose fit between the coupling and the input shaft, affecting the torque transmission efficiency and even causing loosening, wear and other problems; pressing in too deep may damage the coupling or input shaft, reducing its service life and even causing safety accidents. Utility Model Content

[0004] The purpose of the utility model is to provide a solution to the problem that the pressing distance cannot be accurately controlled during the installation process of the traditional coupling.

[0005] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0006] A coupling pressing tool comprises: a coupling and a transmission shaft, wherein the coupling is used to be sleeved on the transmission shaft; a pressing cylinder assembly, wherein the pressing cylinder assembly is used to push the coupling to move along the axial direction of the transmission shaft to sleeve the coupling on the transmission shaft; the pressing cylinder assembly comprises an inner cylinder, an outer cylinder and a locking assembly, wherein the outer cylinder is movably sleeved on the inner cylinder to adjust the extension length of the inner cylinder; the locking assembly is respectively connected to the inner cylinder and the outer cylinder, and the locking assembly is used to lock the position of the outer cylinder on the inner cylinder; the outer cylinder is used to abut on the coupling and push the coupling to move, and the inner cylinder is used to abut on the transmission shaft during the movement of the coupling to limit the moving distance of the coupling.

[0007] According to the above technical means, in the utility model, the outer cylinder can be movably mounted on the inner cylinder, allowing the operator to accurately adjust the height difference between the inner cylinder and the outer cylinder (i.e., the protruding length of the inner cylinder) according to actual conditions, ensuring that during the press-fitting process, the coupling is accurately and correctly pressed into the predetermined position on the drive shaft. The press-fitting depth can be obtained through simple mathematical calculations (the press-fitting depth is equal to the difference between the end of the coupling and the end of the drive shaft minus the height difference between the inner cylinder and the outer cylinder). By designing an adjustable inner and outer cylinder structure, the accuracy of the press-fitting is greatly improved, avoiding the press-fitting error caused by manual judgment or tool limitations in traditional methods. At the same time, due to the adjustability of the press-fitting assembly structure, the tooling can adapt to coupling and drive shaft combinations of different sizes and models. By adjusting the height difference between the inner cylinder and the outer cylinder, precise control of different press-fitting depths can be achieved, and a variety of press-fitting requirements can be met without changing the tooling, thereby improving work efficiency and reducing tooling costs.

[0008] The utility model allows the operator to easily complete the preparatory work before press-fitting by simply adjusting the height difference between the inner and outer cylinders and locking them in position. During the press-fitting process, external force pushes the inner and outer cylinders to move simultaneously, and the outer cylinder pushes the coupling into the drive shaft until the inner cylinder abuts the drive shaft. The entire press-fitting process is stable and controllable, greatly reducing operational difficulty and human error.

[0009] Furthermore, the length of the outer cylinder is smaller than that of the inner cylinder, and the outer cylinder is configured to be always sleeved on the inner cylinder.

[0010] According to this technical approach, the inner cylinder serves as the primary support and guide during the press-fit process, its longer length providing improved stability and guidance. The outer cylinder, sleeved over the inner cylinder, pushes the coupling onto the drive shaft while being guided and supported by the inner cylinder. This ensures a smooth and accurate press-fit process, helps reduce offset and vibration, and improves press-fit quality.

[0011] At the same time, because the outer cylinder is always mounted on the inner cylinder, adjusting the height difference between the inner and outer cylinders becomes simple and intuitive. The operator can easily control the pressing depth of the coupling simply by adjusting the position of the outer cylinder relative to the inner cylinder.

[0012] Furthermore, the locking assembly includes a pressure cover, which is a blind hole structure, one end of the inner cylinder is installed at the bottom of the hole of the pressure cover, and the other end is used to abut against the transmission shaft; a first internal thread is formed on the inner wall of the pressure cover, and an external thread is formed on the end of the outer cylinder away from the coupling, the first internal thread is adapted to the external thread, and the end of the outer cylinder away from the coupling is threadedly connected to the pressure cover, so that the outer cylinder is locked on the inner cylinder through the pressure cover.

[0013] According to the above technical means, since the ends of the inner and outer cylinders are both connected to the gland, they can move synchronously under external pressure during the press-fitting process. The blind hole structure of the gland provides a stable support platform for the inner and outer cylinders, preventing them from relative displacement under load, thereby enhancing the structural stability of the entire cylinder assembly.

[0014] The outer cylinder is connected to the gland via a threaded connection. This not only limits the outer cylinder's movement to within the predetermined first internal thread length, but also ensures stable installation of the outer cylinder after movement through the self-locking function of the threads, effectively preventing misalignment during axial movement. This ensures that even when subjected to significant axial force during the press-fit process, the outer cylinder remains in the correct position, avoiding issues such as inaccurate press-fitting or component damage caused by misalignment.

[0015] Furthermore, the locking assembly also includes a limiting ring, a second internal thread is formed on the inner wall of the limiting ring, the second internal thread is adapted to the external thread, the limiting ring is threadedly connected to the outer cylinder, and the limiting ring abuts against the pressure cover, and the limiting ring is used to limit the connection length between the pressure cover and the outer cylinder.

[0016] According to the above technical means, the second internal thread formed on the inner wall of the limiting ring is adapted to the external thread on the outer cylinder, thereby realizing a threaded connection between the limiting ring and the outer cylinder, effectively preventing loosening caused by vibration or external force during use, thereby enhancing the connection stability of the entire locking assembly.

[0017] At the same time, the limit ring abuts against the gland, which plays a role in accurately limiting the connection length between the gland and the outer cylinder, ensuring that the locking assembly can achieve the best locking effect in different application scenarios.

[0018] Furthermore, the locking assembly further includes a locking bolt. A first through hole is formed on the pressure cover, and the locking bolt can pass through the first through hole and tightly abut against the end of the outer cylinder away from the coupling.

[0019] With this technical approach, micro-movements during threaded installation can cause the installation position to shift or loosen, impacting the accuracy and performance of the entire system. The tight abutment of the locking bolt ensures the locking assembly's positional accuracy during installation, effectively preventing micro-movements that may occur during threaded installation and improving the stability and reliability of the entire system.

[0020] Furthermore, a step is formed on one end of the outer cylinder away from the coupling, and the outer diameter of the step is smaller than the outer diameter of the external thread; the locking bolt passes through the first through hole and can abut against the step to lock the pressure cover.

[0021] The aforementioned technical approach effectively creates a non-threaded abutment surface for the locking bolt. During the tightening process, the head of the locking bolt or the tightening tool does not directly contact the external threads, thus preventing thread damage from friction or scratching. This ensures the integrity and cleanliness of the external threads, facilitating subsequent disassembly and reinstallation.

[0022] Furthermore, it also includes a jack, the output end of the jack is connected to the pressure cover, and the jack can drive the pressure cover to move along the axial direction of the transmission shaft, so that the outer cylinder pushes the coupling to move along the axial direction of the transmission shaft.

[0023] According to the above technical means, the jack is usually driven by hydraulic or pneumatic pressure, with stable driving force and reliable control system. During the assembly process, it can be ensured that the output end of the jack stably pushes the gland and coupling.

[0024] Furthermore, it also includes a tie rod seat and a tie rod, the tie rod seat is located in the inner tube, and the tie rod seat is fixed on the transmission shaft; the jack is a hollow structure, a second through hole is formed on the tie rod seat, and a third through hole is formed on the pressure cover, the second through hole corresponds to the position of the third through hole, one end of the tie rod is fixed on the tie rod seat, and the other end passes through the second through hole, the third through hole and the jack in sequence, and is fixed to the end of the jack away from the pressure cover.

[0025] According to the above technical means, when the jack is operating, the recoil generated by it may adversely affect the coupling or drive shaft. Through the design of the tie rod and tie rod seat, the recoil force of the jack is transmitted through the tie rod to the tie rod seat, and ultimately borne by the drive shaft. This effectively offsets and disperses the recoil force, preventing direct impact and damage to the coupling or drive shaft.

[0026] Furthermore, a screw is included. A fourth through hole is formed on the pull rod seat, and the screw passes through the fourth through hole to fix the pull rod seat on the transmission shaft.

[0027] According to the above technical means, the screws securely fix the rod seat to the transmission shaft through the fourth through hole, ensuring that the rod seat does not loosen or shift during the press-fitting process, thereby ensuring the stability and reliability of the entire press-fitting system.

[0028] Furthermore, it also includes an oiler joint, an oil filling hole is formed in the transmission shaft, and the oiler joint is connected to the oil filling hole; a first slot is formed on the outer cylinder, a second slot is formed on the inner cylinder, and a third slot is formed on the pull rod seat, the first slot, the second slot and the third slot structures are adapted to each other, and the oiler joint can pass through the first slot, the second slot and the third slot in sequence to connect with the oil filling hole.

[0029] According to the above technical means, the oiler joint can pass through the first slot of the outer cylinder, the second slot of the inner cylinder, and the third slot of the pull rod seat in sequence, and finally connect with the oil filling hole in the drive shaft so as to inject the expansion fluid into the drive shaft. Its main purpose is to allow the coupling to achieve hydraulic radial expansion during the pressing process, reduce the friction resistance of the mating surface, and ensure that its mating surface is not stretched or damaged during the pressing process.

[0030] During the specific installation process, the hollow jack is started first by starting the oil pump to push the pressure cylinder assembly and the coupling until pressure is built up at the oiler joint. The oil pump and the oiler joint work simultaneously, and the coupling can be accurately pressed into the specified position, reducing the impact and vibration during the pressing process, which is beneficial to protecting the various components of the transmission system.

[0031] The lubricator connector of the utility model has an angled structure. The design of the first slot, the second slot and the third slot allows the lubricator connector to smoothly pass through these components and connect with the oil filling hole, which not only saves space but also makes the structure of the entire transmission system more compact and reasonable.

[0032] Beneficial effects achieved by this utility model:

[0033] 1. In the present invention, the outer cylinder is movably mounted on the inner cylinder, allowing the operator to precisely adjust the height difference between the inner cylinder and the outer cylinder (i.e., the extended length of the inner cylinder) according to actual conditions, ensuring that the coupling is accurately and correctly pressed into the predetermined position on the drive shaft during the press-fitting process. The press-fitting depth can be calculated through simple mathematical calculations (the press-fitting depth is equal to the difference between the end of the coupling and the end of the drive shaft minus the height difference between the inner cylinder and the outer cylinder). By designing an adjustable inner and outer cylinder structure, the accuracy of the press-fitting is greatly improved, avoiding the press-fitting error caused by manual judgment or tool limitations in traditional methods. At the same time, due to the adjustability of the press-fitting assembly structure, the tooling can adapt to coupling and drive shaft combinations of different sizes and models. By adjusting the height difference between the inner cylinder and the outer cylinder, precise control of different press-fitting depths can be achieved, and a variety of press-fitting requirements can be met without changing the tooling, thereby improving work efficiency and reducing tooling costs.

[0034] 2. This utility model allows operators to easily complete pre-press-fit preparations simply by adjusting the height difference between the inner and outer cylinders and locking them in position. During the press-fit process, external force pushes the inner and outer cylinders to move simultaneously, and the outer cylinder pushes the coupling into the drive shaft until the inner cylinder abuts the drive shaft. The entire press-fit process is stable and controllable, greatly reducing operational difficulty and human error. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the overall cross-sectional structure of the present utility model;

[0036] Figure 2 This is a schematic diagram of the press-fitting of the utility model;

[0037] Figure 3 This is a schematic diagram of the cross-sectional structure of the pressing cylinder assembly of the present utility model;

[0038] Figure 4 This is a schematic diagram of the explosion structure of the pressure cylinder assembly of the utility model;

[0039] Figure 5 This is a schematic diagram of the gland structure of the present utility model;

[0040] Figure 6 This is a schematic structural diagram of the pull rod seat of the utility model;

[0041] Figure 7 This is a schematic diagram of the cross-sectional structure of the oil injector joint of the present utility model;

[0042] Figure 8 This is a schematic diagram of the overall structure of the oiler connector of the utility model;

[0043] Among them, 1. Coupling;

[0044] 2. Drive shaft; 21. Oil filling hole;

[0045] 3. Pressing cylinder assembly; 31. Inner cylinder; 311. Second slot; 32. Outer cylinder; 321. External thread; 322. Step; 323. First slot; 33. Locking assembly; 331. Gland; 3311. First through hole; 3312. Third through hole; 332. Limiting ring; 333. Locking bolt;

[0046] 4. Jack;

[0047] 5. Tie rod seat; 51. Second through hole; 52. Fourth through hole; 53. Third slot;

[0048] 6. Pull rod;

[0049] 7. Screws;

[0050] 8. Lubricator connector; 81. First adapter; 82. Second adapter; 83. Third adapter; 84. Adapter nut.

[0051] The accompanying drawings are for illustrative purposes only and should not be construed as limitations on this patent. To better illustrate this embodiment, some components of the accompanying drawings may be omitted, enlarged, or reduced in size and do not represent the actual dimensions of the product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted from the accompanying drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limitations on this patent. DETAILED DESCRIPTION

[0052] It should be noted that, unless there is a conflict, the embodiments in this application and the technical features in the embodiments can be combined with each other. The detailed description in the specific embodiments should be understood as an explanation of the purpose of this application and should not be regarded as an improper restriction on this application.

[0053] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the specific technical solutions of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application but are not intended to limit the scope of the present application.

[0054] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "multiple" means two or more.

[0055] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integrated connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0056] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0057] The technical solution of this embodiment is described in detail below with reference to the specific drawings.

[0058] like Figure 1 As shown, this embodiment proposes a coupling pressing tool, including: a coupling 1 and a transmission shaft 2, the coupling 1 is used to be sleeved on the transmission shaft 2; a pressing cylinder assembly 3, the pressing cylinder assembly 3 is used to push the coupling 1 to move along the axial direction of the transmission shaft 2 to sleeve the coupling 1 on the transmission shaft 2; the pressing cylinder assembly 3 includes an inner cylinder 31, an outer cylinder 32 and a locking assembly 33, the outer cylinder 32 is movably sleeved on the inner cylinder 31 to adjust the extension length of the inner cylinder 31; the locking assembly 33 is respectively connected to the inner cylinder 31 and the outer cylinder 32, and the locking assembly 33 is used to lock the position of the outer cylinder 32 on the inner cylinder 31; the outer cylinder 32 is used to abut on the coupling 1 and push the coupling 1 to move, and the inner cylinder 31 is used to abut on the transmission shaft 2 when the coupling 1 moves to limit the moving distance of the coupling 1.

[0059] During the specific press-fitting process, the coupling 1 is gently placed on the transmission shaft 2 to ensure that the axes are aligned.

[0060] According to the preset pressing depth of the coupling 1 and the difference between the end of the coupling 1 and the end of the transmission shaft 2, the relative positions of the inner cylinder 31 and the outer cylinder 32 are adjusted, wherein, Figure 2 As shown, the press-in depth is equal to the difference between the ends of coupling 1 and drive shaft 2 minus the height difference between inner and outer cylinders 31 and 32, i.e., b = ah. Use the locking assembly to lock the outer cylinder in place on inner cylinder 31. After locking, check that the locking assembly 33 is secure and reliable to prevent loosening or displacement during the press-in process.

[0061] Place the entire press-fitting assembly 3 relative to the coupling 1 and drive shaft 2, ensuring that the outer cylinder 32 contacts the coupling 1 and the inner cylinder 31 is inserted into the hole of the coupling 1. Then, apply uniform and stable pressure to the outer cylinder 32. Under the pressure, the outer cylinder 32 pushes the coupling 1 axially along the drive shaft 2, while the inner cylinder 31 acts as a guide and support component, ensuring a smooth press-fitting process.

[0062] The press-fitting process ends when the end of the inner cylinder 31 abuts against the transmission shaft 2. At this point, the coupling 1 has been accurately and firmly press-fitted onto the transmission shaft 2, and the press-fitting depth meets the design requirements.

[0063] like Figure 1 and Figure 2As shown, in this embodiment, the outer cylinder 32 is movably mounted on the inner cylinder 31, allowing the operator to precisely adjust the height difference between the inner and outer cylinders 31, 32 (i.e., the extended length of the inner cylinder 31) according to actual needs, ensuring that the coupling 1 is accurately and correctly pressed into the predetermined position on the drive shaft 2 during the press-fitting process. The press-fitting depth can be calculated through simple mathematical calculation (the press-fitting depth is equal to the difference between the end of the coupling 1 and the end of the drive shaft 2 minus the height difference between the inner and outer cylinders 31, 32, i.e., b = ah). The design of the adjustable inner and outer cylinders 32 greatly improves the accuracy of the press-fitting process, avoiding the press-fitting errors caused by manual judgment or tool limitations in traditional methods. Furthermore, due to the adjustable structure of the press-fitting cylinder assembly 3, the tooling can accommodate different sizes and models of couplings 1 and drive shafts 2. By adjusting the height difference between the inner and outer cylinders 31, 32, precise control of the press-fitting depth can be achieved, meeting various press-fitting requirements without changing the tooling, improving work efficiency and reducing tooling costs.

[0064] The utility model allows the operator to easily complete the preparatory work before press-fitting by simply adjusting the height difference between the inner cylinder 31 and the outer cylinder 32 and locking the position. During the press-fitting process, an external force pushes the inner cylinder 31 and the outer cylinder 32 to move simultaneously, and the outer cylinder 32 pushes the coupling 1 into the drive shaft 2 until the inner cylinder 31 abuts the drive shaft 2. The entire press-fitting process is stable and controllable, greatly reducing the difficulty of operation and human error.

[0065] like Figure 3 As shown, the length of the outer cylinder 32 is shorter than that of the inner cylinder 31 , and the outer cylinder 32 is configured to be always sleeved on the inner cylinder 31 .

[0066] During the press-fitting process, inner cylinder 31 serves as the primary support and guide component, its longer length providing greater stability and guidance. Outer cylinder 32, sleeved over inner cylinder 31, pushes coupling 1 onto drive shaft 2 while being guided and supported by inner cylinder 31, ensuring a smooth and accurate press-fitting process. This helps reduce offset and vibration during the press-fitting process, improving press-fitting quality.

[0067] At the same time, since the outer cylinder 32 is always mounted on the inner cylinder 31, it is simple and intuitive to adjust the height difference between the inner cylinder 31 and the outer cylinder 32. The operator can easily control the pressing depth of the coupling 1 by simply adjusting the position of the outer cylinder 32 relative to the inner cylinder 31.

[0068] like Figure 1 、 Figure 3-Figure 5As shown, the locking assembly 33 includes a pressure cover 331, which is a blind hole structure. One end of the inner cylinder 31 is installed at the bottom of the hole of the pressure cover 331, and the other end is used to abut on the transmission shaft 2; a first internal thread is formed on the inner wall of the pressure cover 331, and an external thread 321 is formed at the end of the outer cylinder 32 away from the coupling 1. The first internal thread is adapted to the external thread 321, and the end of the outer cylinder 32 away from the coupling 1 is threadedly connected to the pressure cover 331, so that the outer cylinder 32 is locked on the inner cylinder 31 through the pressure cover 331.

[0069] Because the ends of the inner and outer cylinders 31, 32 are both connected to the pressing cap 331, they can move synchronously under external pressure during the press-fitting process. The blind hole structure of the pressing cap 331 provides a stable support platform for the inner and outer cylinders 31, 32, preventing relative displacement when subjected to force, thereby enhancing the structural stability of the entire pressing cylinder assembly 3.

[0070] The outer cylinder 32 is connected to the gland 331 via a threaded connection. This not only limits the movement of the outer cylinder 32 to within the predetermined first internal thread length, but also ensures a stable installation of the outer cylinder 32 after movement through the self-locking function of the threads, effectively preventing misalignment of the outer cylinder 32 during axial movement. This ensures that even when subjected to significant axial force during the press-fitting process, the outer cylinder 32 remains in the correct position, avoiding issues such as inaccurate press-fitting or component damage caused by misalignment.

[0071] In this embodiment, knurling is formed on the surface of the pressure cover 331 , and the knurling is used to increase friction resistance so as to facilitate the operator to manually rotate the pressure cover 331 .

[0072] like Figure 1 、 Figure 3 and Figure 4 As shown, the locking assembly 33 also includes a limiting ring 332, and a second internal thread is formed on the inner wall of the limiting ring 332, and the second internal thread is adapted to the external thread 321. The limiting ring 332 is threadedly connected to the outer cylinder 32, and the limiting ring 332 is abutted against the pressure cover 331. The limiting ring 332 is used to limit the connection length between the pressure cover 331 and the outer cylinder 32.

[0073] In this embodiment, the second internal thread formed on the inner wall of the limiting ring 332 is adapted to the external thread 321 on the outer cylinder 32, thereby realizing a threaded connection between the limiting ring 332 and the outer cylinder 32, effectively preventing loosening due to vibration or external force during use, thereby enhancing the connection stability of the entire locking assembly 33.

[0074] At the same time, the limiting ring 332 abuts against the pressure cover 331, which plays a role in accurately limiting the connection length between the pressure cover 331 and the outer cylinder 32, ensuring that the locking assembly 33 can achieve the best locking effect in different application scenarios.

[0075] In this embodiment, the surface of the retaining ring 332 is knurled to increase frictional resistance, facilitating manual rotation of the retaining ring 332 by the operator. Preferably, to further tighten the retaining ring 332, the retaining ring 332 is formed with multiple blind holes, each evenly distributed. The blind hole design allows the operator to use an external rod (such as a wrench, screwdriver, etc.) as a torque arm, allowing for more effective force application. This increases the torque required to tighten the retaining ring, ensuring a more secure connection between the retaining ring and the outer cylinder, and improving the stability and reliability of the entire locking assembly 33.

[0076] like Figure 1 、 Figure 3-Figure 5 As shown, the locking assembly 33 further includes a locking bolt 333 . A first through hole 3311 is formed on the pressure cover 331 . The locking bolt 333 can pass through the first through hole 3311 and tightly abut against the end of the outer cylinder 32 away from the coupling 1 .

[0077] During threaded installation, micro-movements can cause the installation position to shift or become loose, thus affecting the accuracy and performance of the entire system. The tight contact of the locking bolt 333 ensures the positional accuracy of the locking assembly 33 during installation, effectively preventing micro-movements that may occur during threaded installation and improving the stability and reliability of the entire system.

[0078] like Figure 3 and Figure 4 As shown, a step 322 is formed on the end of the outer cylinder 32 away from the coupling 1 , and the outer diameter of the step 322 is smaller than the outer diameter of the external thread 321 ; the locking bolt 333 passes through the first through hole and can abut against the step 322 to lock the pressure cover 331 .

[0079] The step 322 effectively provides a non-threaded abutment surface for the locking bolt 333. During the tightening process, the head of the locking bolt 333 or the tightening tool does not directly contact the external thread 321, thereby avoiding thread damage caused by friction or scratching, ensuring the integrity and cleanliness of the external thread 321, and facilitating subsequent disassembly and reassembly.

[0080] like Figure 1 As shown, it also includes a jack 4, the output end of the jack 4 is connected to the pressure cover 331, and the jack 4 can drive the pressure cover 331 to move along the axial direction of the transmission shaft 2, so that the outer cylinder 32 pushes the coupling 1 to move along the axial direction of the transmission shaft 2.

[0081] The jack 4 is usually driven by hydraulic pressure or pneumatic pressure, and has a stable driving force and a reliable control system. During the assembly process, it can be ensured that the output end of the jack 4 stably pushes the gland 331 and the coupling 1.

[0082] like Figure 1 and Figure 6 As shown, it also includes a tie rod seat 5 and a tie rod 6. The tie rod seat 5 is located in the inner tube 31, and the tie rod seat 5 is fixed on the transmission shaft 2; the jack 4 is a hollow structure, a second through hole 51 is formed on the tie rod seat 5, and a third through hole 3312 is formed on the pressure cover 331, and the second through hole 51 corresponds to the third through hole 3312 in position. One end of the tie rod 6 is fixed on the tie rod seat 5, and the other end passes through the second through hole 51, the third through hole 3312 and the jack 4 in sequence, and is fixed to the end of the jack 4 away from the pressure cover 331.

[0083] When jack 4 is operating, the recoil it generates could adversely affect coupling 1 or drive shaft 2. The design of tie rod 6 and tie rod seat 5 allows the recoil of jack 4 to be transmitted through tie rod 6 to tie rod seat 5, ultimately borne by drive shaft 2. This effectively offsets and disperses the recoil, preventing direct impact and damage to coupling 1 or drive shaft 2.

[0084] In this embodiment, in order to strengthen the connection between the pull rod 6 and the jack 4 , a nut is installed on the end of the jack 4 away from the pressure cover 331 to fix the connection between the jack 4 and the pull rod 6 .

[0085] like Figure 1 As shown, it also includes screws 7, as shown Figure 6 As shown, a fourth through hole 52 is formed on the tie rod seat 5 , and a screw 7 passes through the fourth through hole 52 to fix the tie rod seat 5 on the transmission shaft 2 .

[0086] The screw 7 securely fixes the rod seat 5 to the transmission shaft 2 through the fourth through hole 52, ensuring that the rod seat 5 does not loosen or shift during the press-fitting process, thereby ensuring the stability and reliability of the entire press-fitting system.

[0087] like Figure 1 As shown, it also includes an oiler joint 8, an oil filling hole 21 is formed in the transmission shaft 2, and the oiler joint 8 is connected to the oil filling hole 21; a first slot 323 is formed on the outer cylinder 32, a second slot 311 is formed on the inner cylinder 31, and a third slot 53 is formed on the pull rod seat 5. The first slot 323, the second slot 311 and the third slot 53 are structurally adapted, and the oiler joint 8 can pass through the first slot 323, the second slot 311 and the third slot 53 in sequence to connect with the oil filling hole 21.

[0088] In this embodiment, the oiler connector 8 can pass through the first slot 323 of the outer cylinder 32, the second slot 311 of the inner cylinder 31, and the third slot 53 of the tie rod seat 5 in sequence, and finally connect with the oil filling hole 21 in the transmission shaft 2 so as to inject the expansion fluid into the transmission shaft 2. Its main purpose is to allow the coupling 1 to achieve hydraulic radial expansion during the pressing process, reduce the friction resistance of the mating surface, and ensure that its mating surface is not stretched or damaged during the pressing process.

[0089] During the specific installation process, the hollow jack 4 is started first by starting the oil pump to push the pressure cylinder assembly 3 and the coupling 1 until the oiler builds up pressure. The oil pump and the oiler work simultaneously, and the coupling 1 can be accurately pressed into the specified position, reducing the impact and vibration during the pressing process, which is beneficial to protecting the various components of the transmission system.

[0090] In this embodiment, the lubricator connector 8 is an angled structure. The design of the first slot 323, the second slot 311, and the third slot 53 allows the lubricator connector 8 to smoothly pass through these components and connect with the oil filling hole 21, which not only saves space but also makes the structure of the entire transmission system more compact and reasonable.

[0091] like Figure 7 and Figure 8 As shown, in this embodiment, the lubricator connector 8 includes a first adapter 81, a second adapter 82, a third adapter 83, and an adapter nut 84. One end of the second adapter 82 is threadedly connected to the first adapter 81, and the first adapter 81 is used to connect to the external lubricator; the other end of the second adapter 82 is connected to the third adapter 83 via the adapter nut 84, and the third adapter 83 is used to connect to the oil filling hole 21 of the transmission shaft 2. In this embodiment, preferably, all joints of the lubricator connector 8 use spherical seals or conical seals.

[0092] The serial numbers of the embodiments of this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are only preferred embodiments of this application and do not limit the scope of the patent of this application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of this application.

Claims

1. A coupling press fitting, characterized in that: include: A coupling (1) and a transmission shaft (2), wherein the coupling (1) is used to be sleeved on the transmission shaft (2); A pressing cylinder assembly (3), the pressing cylinder assembly (3) is used to push the coupling (1) to move along the axial direction of the transmission shaft (2) so as to sleeve the coupling (1) on the transmission shaft (2); The pressing cylinder assembly (3) comprises an inner cylinder (31), an outer cylinder (32) and a locking assembly (33), wherein the outer cylinder (32) is movably sleeved on the inner cylinder (31) to adjust the extension length of the inner cylinder (31); the locking assembly (33) is connected to the inner cylinder (31) and the outer cylinder (32) respectively, and the locking assembly (33) is used to lock the position of the outer cylinder (32) on the inner cylinder (31); the outer cylinder (32) is used to abut against the coupling (1) and push the coupling (1) to move, and the inner cylinder (31) is used to abut against the transmission shaft (2) when the coupling (1) moves to limit the moving distance of the coupling (1).

2. A coupling press-fitting tool according to claim 1, characterized in that: The length of the outer cylinder (32) is shorter than that of the inner cylinder (31), and the outer cylinder (32) is configured to be always sleeved on the inner cylinder (31).

3. A coupling press-fitting tool according to claim 2, characterized in that: The locking assembly (33) includes a pressure cover (331), and the pressure cover (331) is a blind hole structure. One end of the inner cylinder (31) is installed at the bottom of the hole of the pressure cover (331), and the other end is used to abut on the transmission shaft (2); a first internal thread is formed on the inner wall of the pressure cover (331), and an external thread (321) is formed on the end of the outer cylinder (32) away from the coupling (1), and the first internal thread is adapted to the external thread (321). The end of the outer cylinder (32) away from the coupling (1) is threadedly connected to the pressure cover (331), so that the outer cylinder (32) is locked on the inner cylinder (31) through the pressure cover (331).

4. A coupling press-fitting tool according to claim 3, characterized in that: The locking assembly (33) further includes a limiting ring (332), wherein a second internal thread is formed on the inner wall of the limiting ring (332), and the second internal thread is adapted to the external thread (321). The limiting ring (332) is threadedly connected to the outer cylinder (32), and the limiting ring (332) abuts against the pressure cover (331). The limiting ring (332) is used to limit the connection length between the pressure cover (331) and the outer cylinder (32).

5. The coupling press-fitting tool according to claim 3, characterized in that: The locking assembly (33) further includes a locking bolt (333). A first through hole (3311) is formed on the pressure cover (331). The locking bolt (333) can pass through the first through hole (3311) and tightly abut against the end of the outer cylinder (32) away from the coupling (1).

6. A coupling press-fitting tool according to claim 5, characterized in that: A step (322) is formed on one end of the outer cylinder (32) away from the coupling (1), and the outer diameter of the step (322) is smaller than the outer diameter of the external thread (321); the locking bolt (333) passes through the first through hole and can abut against the step (322) to lock the pressure cover (331).

7. A coupling press-fitting tool according to claim 3, characterized in that: It also includes a jack (4), the output end of the jack (4) is connected to the pressure cover (331), and the jack (4) can drive the pressure cover (331) to move along the axial direction of the transmission shaft (2), so that the outer cylinder (32) pushes the coupling (1) to move along the axial direction of the transmission shaft (2).

8. A coupling press-fitting tool according to claim 7, characterized in that: It also includes a pull rod seat (5) and a pull rod (6), wherein the pull rod seat (5) is located in the inner tube (31), and the pull rod seat (5) is fixed on the transmission shaft (2); the jack (4) is a hollow structure, a second through hole (51) is formed on the pull rod seat (5), and a third through hole (3312) is formed on the pressure cover (331), and the second through hole (51) corresponds to the position of the third through hole (3312); one end of the pull rod (6) is fixed on the pull rod seat (5), and the other end passes through the second through hole (51), the third through hole (3312) and the jack (4) in sequence, and is fixed on the end of the jack (4) away from the pressure cover (331).

9. The coupling press-fitting tool according to claim 8, characterized in that: It also includes a screw (7), a fourth through hole (52) is formed on the pull rod seat (5), and the screw (7) passes through the fourth through hole (52) to fix the pull rod seat (5) on the transmission shaft (2).

10. The coupling press-fitting tool according to claim 8, characterized in that: The invention also includes an oiler joint (8), an oil filling hole (21) is formed in the transmission shaft (2), and the oiler joint (8) is connected to the oil filling hole (21); a first slot (323) is formed on the outer cylinder (32), a second slot (311) is formed on the inner cylinder (31), and a third slot (53) is formed on the pull rod seat (5); the first slot (323), the second slot (311) and the third slot (53) are structurally adapted to each other, and the oiler joint (8) can sequentially pass through the first slot (323), the second slot (311) and the third slot (53) to be connected to the oil filling hole (21).

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