AC motor driven hydraulic pump package seal installation tool

Abstract

The utility model provides an alternating current motor drive hydraulic pump combination sealing installation tool belongs to mechanical assembly technical field, including the butt joint sleeve, the inner diameter of butt joint sleeve and the outer diameter of rotating shaft flat key connection section adaptation, the outer diameter and the outer diameter of rotating shaft sealing fit section adaptation, the inner wall of butt joint sleeve is equipped with the positioning slot along the axial extension of butt joint sleeve, and the flat key can slide into the positioning slot to realize the circumferential positioning of butt joint sleeve and flat key connection section, the outer wall of butt joint sleeve is equipped with two positioning butt joint surfaces, and two positioning butt joint surfaces are opposite along the radial direction of butt joint sleeve and parallel with each other, all are vertical plane along the axial extension of butt joint sleeve, and can butt joint with the two positioning surfaces of sealing fit section respectively to realize axial alignment, butt joint sleeve is used to make the outer wall with the outer wall of sealing fit section form continuous smooth transition surface through the circumferential positioning of flat key connection section and the axial alignment of sealing fit section, lets the combination sealing of butt joint sleeve can slide along the transition surface and installs to sealing fit section.

Description

Technical Field

[0001] This application belongs to the field of mechanical assembly technology, specifically relating to an AC motor driven hydraulic pump combined sealing installation tool. Background Technology

[0002] In the assembly of rotating shafts such as hydraulic pump drive shafts, a combined seal consisting of a locating circlip, a disc spring, a pressure regulating shim, a rubber seal, a clamping spring, and a metal seal needs to be installed onto the sealing mating section of the shaft. This installation process presents two key challenges: First, the locating mating surface of the locating circlip must be precisely aligned and embedded within a narrow cavity inaccessible to the hand, aligning with the locating surface on the shaft. Second, the rubber seal, in its pre-tightened state under the clamping spring, must pass through both the flat key on the shaft and the annular end face of the shaft sealing mating section, which is perpendicular to the shaft and has a larger diameter, under conditions of restricted radial freedom. Utility Model Content

[0003] In view of this, this application provides an AC motor driven hydraulic pump combined sealing installation tool, the main purpose of which is to improve assembly efficiency and quality.

[0004] To achieve the above objectives, this application mainly provides the following technical solutions: This application provides an AC motor-driven hydraulic pump combined seal installation tool. The rotating shaft, along the installation direction of the combined seal, is sequentially provided with a keyed connecting section and a sealing mating section, and the diameter of the keyed connecting section is smaller than the diameter of the sealing mating section. A key is provided on the side of the keyed connecting section, and the side of the sealing mating section near the end of the keyed connecting section has two positioning surfaces for clearance mating with the positioning mating surface of the combined seal. The two positioning surfaces are radially opposite to each other and parallel to each other, both being vertical planes extending axially along the rotating shaft, and one of the positioning surfaces is axially opposite to the key. The installation tool includes: A mating sleeve is provided, the inner diameter of which is adapted to the outer diameter of the key connecting section, and the outer diameter of which is adapted to the outer diameter of the sealing mating section. The inner wall of the mating sleeve has a positioning groove extending axially along the sleeve, allowing the key to slide into the positioning groove for circumferential positioning of the mating sleeve and the key connecting section. The outer wall of the mating sleeve has two positioning mating surfaces, which are radially opposite to each other and parallel to each other. Both are vertical planes extending axially along the sleeve and can respectively mate with the two positioning surfaces of the sealing mating section for axial alignment. The mating sleeve, through circumferential positioning with the key connecting section and axial alignment with the sealing mating section, forms a continuous and smooth transition surface between its outer wall and the outer wall of the sealing mating section, allowing the combined seal fitted on the mating sleeve to slide along the transition surface and be installed into the sealing mating section.

[0005] Optionally, at least two positioning grooves are provided, and the two positioning grooves are arranged opposite each other along the radial direction of the mating sleeve. The widths of the two positioning grooves are slightly different to cover the tolerance of the flat key. When in use, a positioning groove with a suitable groove width can be selected to ensure accurate positioning.

[0006] Optionally, the AC motor-driven hydraulic pump combined sealing installation tool also includes a guide sleeve detachably connected to the docking sleeve. The outer diameter of the guide sleeve is adapted to the outer diameter of the docking sleeve, and the guide sleeve has at least one section with a variable diameter structure. The diameter of the variable diameter structure gradually decreases in the direction from near the docking sleeve to away from the docking sleeve, so as to guide the combined sealing into the docking sleeve.

[0007] Optionally, the detachable connection between the guide sleeve and the docking sleeve is an insertion fit. The guide sleeve has an insertion section at one end near the docking sleeve. The outer diameter of the insertion section is adapted to the inner diameter of the docking sleeve. The insertion section can be inserted axially into the end of the docking sleeve.

[0008] Optionally, the outer wall of the insertion section is provided with a positioning pin, which is used to slide into the positioning groove on the inner wall of the docking sleeve along the axial direction of the docking sleeve.

[0009] Optionally, the AC motor-driven hydraulic pump combined seal installation tool further includes an ejector sleeve, which is fitted onto the mating sleeve and can slide along the axial direction of the mating sleeve. The ejector sleeve is used to push the combined seal along the transition surface to the sealing mating section.

[0010] Optionally, the AC motor-driven hydraulic pump combination sealing installation tool further includes at least one connecting rod, which is connected to the end of the mating sleeve away from the sealing mating section, and the connecting rod extends axially along the mating sleeve.

[0011] Optionally, the end of the connecting rod that connects to the docking sleeve is provided with a clearance hole, which communicates with the inner wall cavity of the docking sleeve.

[0012] Optionally, the axial length of the ejector sleeve is greater than the axial length of the mating sleeve, and the end of the ejector sleeve away from the sealing mating section extends to the outside of the mating sleeve and is sleeved on at least part of the connecting rod. The ejector sleeve can slide along the axial path formed by the connecting rod and the mating sleeve.

[0013] Optionally, a limiting pin is provided on the outer wall of the connecting rod, and a limiting groove is provided on the ejector sleeve relative to the position of the limiting pin. The limiting groove extends along the axial direction of the ejector sleeve, and the limiting pin can be slidably embedded in the limiting groove. The limiting groove is used to cooperate with the limiting pin to limit the axial sliding stroke of the ejector sleeve.

[0014] By employing the above technical solution, this application has at least the following beneficial effects: The AC motor-driven hydraulic pump combined seal installation tool provided in this application, by setting a mating sleeve and ensuring that the inner wall positioning groove of the mating sleeve slides into the flat key, and the outer wall positioning mating surface aligns with the positioning surface of the sealing section, can establish a reliable circumferential positioning and axial alignment relationship. Based on this, it not only solves the problem of difficulty in aligning and embedding the positioning retainer and the sealing section in a narrow cavity, ensuring that the positioning mating surface of the positioning retainer can smoothly fit against the positioning surface of the sealing section to complete the clearance fit fixation, but also provides a stable sliding path for the combined seal through the formed continuous and smooth transition surface. With the help of this path, the rubber seal, in a pre-tightened state and with limited radial freedom, can smoothly cross the flat key on the flat key connection section without being subjected to excessive compression or forced deformation, effectively avoiding damage to the rubber seal due to installation operations; at the same time, it significantly reduces the resistance of the combined seal sliding installation, ensuring the installation success rate, and significantly improving the overall installation efficiency while ensuring the installation quality and structural integrity of the combined seal. Attached Figure Description

[0015] Figure 1 This is a top view of a combined seal according to an optional embodiment of this application; Figure 2 for Figure 1 Sectional view at point AA; Figure 3 This is a schematic diagram of the structure of the rotating shaft in one optional embodiment of this application; Figure 4 for Figure 2 Sectional view at point BB; Figure 5 This is a schematic diagram of the structure of an AC motor driven hydraulic pump combined sealing installation tool according to an optional embodiment of this application; Figure 6 for Figure 5 A magnified view of a section at point C; Figure 7 This is a schematic diagram of the structure of an optional embodiment of the present application when the combined seal is fitted into the docking sleeve; Figure 8 This is a schematic diagram of the structure when the docking sleeve and the sealing mating section are docked according to an optional embodiment of this application; Figure 9 This is a schematic diagram of the structure of an optional embodiment of this application, showing the ejector sleeve pushing the combined seal along the transition surface to the sealing mating section.

[0016] The reference numerals in the attached figures are as follows: 100. Combination seal; 101. Positioning retaining ring; 1011. Positioning mating surface; 102. Butterfly compression spring; 103. Pressure adjusting shim; 104. Rubber seal; 105. Clamping spring; 106. Metal seal; 200. Rotating shaft; 201. Keyed connection section; 2011. Key; 202. Sealing mating section; 2021. Positioning surface; 1. Docking sleeve; 11. Positioning groove; 12. Positioning mating surface; 2. Guide sleeve; 21. Positioning pin; 3. Ejection sleeve; 31. Limiting groove; 4. Connecting rod; 41. Clearance hole; 42. Limiting pin. Detailed Implementation

[0017] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 application.

[0018] 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 application, "multiple" means two or more, unless otherwise explicitly specified.

[0019] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0020] See Figures 1 to 4 As shown, in the assembly scenario of a rotating shaft 200 such as a hydraulic pump drive shaft, a combined seal 100 consisting of a positioning retaining ring 101, a butterfly clamping spring 102, a pressure adjusting shim 103, a rubber seal 104, a clamping spring 105, and a metal seal 106 needs to be installed onto the rotating shaft 200. The rotating shaft 200 is a stepped shaft, with a keyed connecting section 201 and a sealing mating section 202 arranged sequentially along the installation direction. The diameter of the keyed connecting section 201 is smaller than the diameter of the sealing mating section 202. A key 2011 is provided on the side of the keyed connecting section 201. Two positioning surfaces 2021 are provided on the side of the sealing mating section 202 near the end of the keyed connecting section 201 for clearance mating with the positioning mating surface 1011 of the combined seal 100. The two positioning surfaces 2021 are arranged opposite to each other in the radial direction of the rotating shaft 200 and are parallel to each other. Both are vertical planes extending in the axial direction of the rotating shaft 200, and one of the positioning surfaces 2021 is arranged opposite to the key 2011 in the axial direction of the rotating shaft 200. During installation, the combined seal 100 must first pass over the key 2011 of the key connecting section 201, and then precisely align and fit the positioning mating surface 1011 of the positioning ring 101 with the positioning surface 2021 of the sealing mating section 202. Finally, the positioning ring 101 is fixed on the sealing mating section 202 through a clearance fit. However, there are two core difficulties in this process: First, the positioning mating surface 1011 of the positioning ring 101 must be precisely aligned and embedded with the positioning surface 2021 of the sealing mating section 202 in a narrow cavity that cannot be reached by hand; Second, the rubber seal 104, which is in the pre-tightened state of the clamping spring 105, must pass through the key 2011 of the key connecting section 201 under the condition of restricted radial freedom, and through the annular transition end face between the key connecting section 201 and the sealing mating section 202, which is perpendicular to the axis of the rotating shaft 200 and has a diameter that gradually increases.

[0021] In order to achieve precise alignment and embedding of the positioning ring 101 and the positioning surface 2021 of the sealing mating section 202 within a narrow cavity, and to assist the rubber seal 104 in a pre-tightened state to smoothly pass through the flat key 2011 of the flat key connection section 201 when the radial degree of freedom is restricted, this application provides an installation tool for the combined seal 100 of the rotating shaft 200, so as to improve the installation efficiency and quality of the combined seal 100.

[0022] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0023] See Figures 5 to 9 As shown, the assembly sealing tool 100 for the rotating shaft 200 includes a mating sleeve 1. The inner diameter of the mating sleeve 1 is adapted to the outer diameter of the key connection section 201, and the outer diameter is adapted to the outer diameter of the sealing mating section 202. The inner wall of the mating sleeve 1 has a positioning groove 11 extending axially along the mating sleeve 1. The key 2011 can slide into the positioning groove 11 to achieve circumferential positioning of the mating sleeve 1 and the key connection section 201. The outer wall of the mating sleeve 1 has two positioning mating surfaces 12. The two positioning mating surfaces 12 extend axially along the mating sleeve. The cylinders 1 are arranged radially opposite to each other and are parallel to each other. They are both vertical planes extending along the axial direction of the mating sleeve 1 and can respectively mate with the two positioning surfaces 2021 of the sealing mating section 202 to achieve axial alignment. The mating sleeve 1 is used to form a continuous and smooth transition surface between its outer wall and the outer wall of the sealing mating section 202 by circumferential positioning with the key connection section 201 and axial alignment with the sealing mating section 202. This allows the combined seal 100 sleeved on the mating sleeve 1 to slide along the transition surface and be installed into the sealing mating section 202.

[0024] The combined sealing 100 installation tool for the rotating shaft 200 provided in the embodiments of this application, by setting a docking sleeve 1 and making the inner wall positioning groove 11 of the docking sleeve 1 slide with the flat key 2011, and the outer wall positioning docking surface 12 dock with the positioning surface 2021 of the sealing mating section 202, can establish a reliable circumferential positioning and axial alignment relationship. Based on this, it not only solves the problem that the positioning retaining ring 101 and the sealing mating section 202 are difficult to align and embed in a narrow cavity, ensuring that the positioning mating surface 1011 of the positioning retaining ring 101 can smoothly fit with the positioning surface 2021 of the sealing mating section 202 to complete the clearance fit fixation, but also provides a stable sliding path for the combined sealing 100 through the formed continuous smooth transition surface. With the help of this path, the rubber seal 104, which is in a pre-tightened state and has limited radial freedom, can smoothly cross the flat key 2011 on the flat key 2011 connecting section 201 without being subjected to excessive compression or forced deformation, effectively avoiding damage to the rubber seal 104 due to installation operations; at the same time, it greatly reduces the resistance of sliding installation of the combined seal 100, ensuring the success rate of installation, and significantly improving the overall installation efficiency while ensuring the installation quality and structural integrity of the combined seal 100.

[0025] When the inner diameter of the mating sleeve 1 matches the outer diameter of the connecting section 201 of the flat key 2011, the inner diameter of the mating sleeve 1 is slightly larger than the outer diameter of the connecting section 201 of the flat key 2011, but the difference is minimal, thus forming a clearance fit. This allows the mating sleeve to be fitted onto the connecting section 201 of the flat key 2011 and to slide axially along the connecting section 201 of the flat key 2011. To limit the circumferential rotation of the mating sleeve 1 and the connecting section 201 of the flat key 2011, an axially extending positioning groove 11 is provided on the inner wall of the mating sleeve 1. When the mating sleeve 1 is fitted onto the connecting section 201 of the flat key 2011 and slides axially along the connecting section 201 of the flat key 2011, the flat key 2011 on the connecting section 201 of the flat key 2011 slides into the positioning groove 11 on the inner wall of the mating sleeve 1. Therefore, the relative angle between the sleeve and the shaft can be fixed, preventing the connecting sleeve 1 and the connecting section 201 of the flat key 2011 from rotating and misaligning during installation.

[0026] When the outer diameter of the mating sleeve 1 matches the outer diameter of the sealing section 202, the outer diameter of the mating sleeve 1 is only slightly larger than the outer diameter of the sealing section 202, and the difference is minimal. This allows the mating sleeve 1 and the sealing section 202 to form a smooth transition surface after mating, ensuring that the combined seal 100 fitted onto the mating sleeve 1 can slide smoothly along the transition surface and be installed onto the sealing section 202. Here, to align the two positioning surfaces 2021 on the sealing section 202, the outer wall of the mating sleeve 1 has two radially opposite and parallel positioning mating surfaces 12, both of which are axially extending vertical planes. When the two positioning mating surfaces 12 on the outer wall of the mating sleeve 1 align with the two positioning surfaces 2021 of the sealing section 202, it ensures that the mating sleeve 1 and the sealing section 202 are perfectly aligned axially without any misalignment.

[0027] Specifically, since one of the two positioning surfaces 2021 of the rotating shaft 200 is positioned relative to the flat key 2011 in the axial direction of the rotating shaft 200, the positioning requirements can be met simply by aligning the positioning groove 11 on the inner wall of the mating sleeve 1 with the positioning mating surface 12 on the outer wall of the mating sleeve 1 in the radial direction of the mating sleeve 1. After positioning and mating, the outer wall of the mating sleeve 1 and the outer wall of the sealing mating section 202 will form a continuous and smooth transition surface, which is the sliding path of the combined seal 100. At this time, the combined seal 100, fitted on the mating sleeve 1, can slide smoothly along the transition surface without forced compression or deformation, thus avoiding damage to the rubber seal 104.

[0028] It is understandable that when only one positioning groove 11 is provided on the inner wall of the docking sleeve 1, it is only necessary to ensure that this single positioning groove 11 is in a relative position with either of the two positioning docking surfaces 12 on the outer wall of the docking sleeve 1 in the radial direction.

[0029] In addition, the positioning slot 11 can also be configured in the following ways, see below. Figure 5 and Figure 6 As shown, at least two positioning grooves 11 are provided. The two positioning grooves 11 are arranged opposite each other along the radial direction of the docking sleeve 1, and the two positioning grooves 11 correspond one-to-one with the two positioning docking surfaces 12 on the outer wall of the docking sleeve 1.

[0030] It should be noted that regardless of the number of positioning grooves 11 on the inner wall of the mating sleeve 1, the assembly method with the flat key 2011 on the flat key connection section 201 of the rotating shaft 200 remains consistent: the flat key 2011 can easily slide into the positioning groove 11 without any need for observation or alignment. Specifically, when only one positioning groove 11 is provided, after gently placing the mating sleeve 1 into contact with the flat key 2011, any rotation angle of less than 360 degrees is sufficient to ensure that the flat key 2011 easily enters the groove; when at least two radially opposite positioning grooves 11 are provided, after gently placing the mating sleeve 1 into contact with the flat key 2011, any rotation angle of less than 180 degrees will allow the flat key 2011 to be embedded in any one of the positioning grooves 11. In other words, whether one or two positioning grooves 11 are provided, the step of repeatedly adjusting the angle of the mating sleeve 1 to align with the groove during installation is eliminated.

[0031] The inclusion of two positioning grooves 11 further accommodates the width tolerance of the flat key 2011. By designing a slight difference in groove width between the two positioning grooves 11 and selecting a positioning groove 11 that matches the width of the flat key 2011, circumferential positioning accuracy can be ensured. Ultimately, the mating sleeve 1 can be fitted onto the flat key connecting section 201 more quickly and complete positioning, while ensuring installation accuracy and success rate, effectively improving the efficiency of the entire assembly process.

[0032] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 5 As shown, the assembly seal 100 installation tool for the rotating shaft 200 also includes a guide sleeve 2 detachably connected to the docking sleeve 1. The outer diameter of the guide sleeve 2 is adapted to the outer diameter of the docking sleeve 1, and the guide sleeve 2 has at least one section of a variable diameter structure. The diameter of the variable diameter structure gradually decreases in the direction from near the docking sleeve 1 to far away from the docking sleeve 1, so as to guide the assembly seal 100 to be fitted into the docking sleeve 1.

[0033] In this embodiment, by setting a detachable guide sleeve 2 with an outer diameter adapted to the docking sleeve 1, and giving it a variable diameter structure with its diameter gradually decreasing along the direction from approaching to moving away from the docking sleeve 1, the difficulty of fitting the combined seal 100 into the docking sleeve 1 can be reduced. Operators do not need to repeatedly adjust the angle and position of the combined seal 100 to accurately align it with the docking sleeve 1, which significantly improves the convenience and efficiency of the combined seal 100 fitting process. At the same time, the detachable design allows it to be flexibly disassembled after the combined seal 100 is fitted, without affecting the subsequent installation process of the combined seal 100 sliding along the docking sleeve 1 towards the sealing mating section 202, further enhancing the practicality and operational flexibility of the entire installation tool.

[0034] The guide sleeve 2 consists of at least two structural sections: a constant diameter section and a variable diameter section, which are connected sequentially along the axial direction of the guide sleeve 2.

[0035] Specifically, the equal diameter section is the structure of the guide sleeve 2 on the side close to the docking sleeve 1, and its outer diameter is matched with the outer diameter of the docking sleeve 1, that is, the outer diameter size is the same or the difference is very small, so as to ensure that there is no step on the outer wall after the two are docked; the variable diameter section is the structure of the guide sleeve 2 on the side away from the docking sleeve 1, and its diameter gradually decreases along the direction away from the equal diameter section, forming a smooth gradient guide surface.

[0036] It should be noted that, in order to improve the stability of the combined seal 100 when sliding from the guide sleeve 2 to the docking sleeve 1, the outer wall of the guide sleeve 2 can also be provided with a positioning docking surface 12 that is consistent with the structure of the outer wall of the docking sleeve 1. That is, two vertical planes that are radially opposite to each other and parallel to each other, and the positioning docking surface 12 can be precisely connected with the positioning docking surface 12 of the docking sleeve 1 to form a continuous sliding path.

[0037] In the above embodiments, see Figure 5 As shown, the detachable connection between the guide sleeve 2 and the docking sleeve 1 is an insertion fit. The guide sleeve 2 has an insertion section at one end near the docking sleeve 1. The outer diameter of the insertion section is adapted to the inner diameter of the docking sleeve 1. The insertion section can be inserted into the end of the docking sleeve 1 axially.

[0038] Here, by setting the detachable connection between the guide sleeve 2 and the docking sleeve 1 as an insert fit, and providing an insertion section at the end of the guide sleeve 2 near the docking sleeve 1 with an outer diameter matching the inner diameter of the docking sleeve 1, assembly can be completed simply by directly inserting the insertion section of the guide sleeve 2 axially into the end of the docking sleeve 1. This eliminates the need for additional complex connecting components such as snap-fits and threads, significantly reducing the difficulty of tool assembly and disassembly, and improving docking efficiency. Simultaneously, the matching of the outer diameter of the insertion section with the inner diameter of the docking sleeve 1 ensures a tight clearance fit after insertion, effectively limiting the relative radial movement of the guide sleeve 2 and the docking sleeve 1. This ensures that their axes are aligned after assembly, preventing the guide sleeve 2 from shifting due to loose connection, which would affect the sliding guidance accuracy of the combined seal 100.

[0039] Further, see Figure 6 As shown, the outer wall of the insertion section is provided with a positioning pin 21, which is used to slide into the positioning groove 11 on the inner wall of the docking sleeve 1 along the axial direction of the docking sleeve 1.

[0040] It should be noted that by setting a positioning pin 21 on the outer wall of the insertion section, and allowing the positioning pin 21 to slide along the axial direction of the docking sleeve 1 and embed into the positioning groove 11 on the inner wall of the docking sleeve 1, the relative circumferential rotation of the two can be further restricted after the insertion section inserts the docking sleeve 1. This prevents circumferential misalignment between the guide sleeve 2 and the docking sleeve 1 during the sliding process of the combined sealing 100, ensuring that the positioning docking surfaces 12 of the guide sleeve 2 and the docking sleeve 1 are always accurately connected. In addition, the positioning pin 21 can serve as a guide when the insertion section inserts the docking sleeve 1. The operator only needs to align the positioning pin 21 with the positioning groove 11 to complete the circumferential alignment of the guide sleeve 2 and the docking sleeve 1, without repeatedly adjusting the angle, simplifying the assembly operation steps and improving the tool assembly efficiency.

[0041] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figures 5 to 9 As shown, the installation tool for the combined seal 100 for the rotating shaft 200 also includes an ejector sleeve 3, which is sleeved on the mating sleeve 1 and can slide along the axial direction of the mating sleeve 1. The ejector sleeve 3 is used to push the combined seal 100 to slide along the transition surface to the sealing mating section 202.

[0042] In this embodiment, by providing an ejector sleeve 3 that is fitted onto the mating sleeve 1 and can slide along its axial direction, a stable and uniform axial thrust carrier is provided for the combined seal 100. This avoids the problem of uneven force application that easily occurs when the operator pushes the combined seal 100 directly by hand or with simple tools. It effectively prevents the positioning mating surface 1011 of the positioning retaining ring 101 from misaligning with the positioning surface 2021 of the sealing mating section 202 due to force displacement during the sliding of the combined seal 100 along the transition surface. This ensures that the combined seal 100 always slides smoothly along the transition surface, ultimately achieving precise sealing. The assembly of section 202 is coordinated with the sliding push of the ejector sleeve 3, eliminating the need for operators to delve into the narrow cavity for installation. This significantly reduces the difficulty of operation in confined spaces and avoids collisions between hands or tools and components such as the combined seal 100 and the rotating shaft 200. It also reduces the risk of damage to the rubber seal 104 and deformation of the positioning ring 101. While ensuring the installation quality and structural integrity of the combined seal 100, it further improves the safety and efficiency of the installation operation, making it particularly suitable for the special operating environment of narrow cavities in the assembly of the rotating shaft 200.

[0043] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figures 5 to 9 As shown, the assembly sealing 100 installation tool for the rotating shaft 200 also includes at least one connecting rod 4, which is connected to the end of the mating sleeve 1 away from the sealing mating section 202, and the connecting rod 4 extends axially along the mating sleeve 1.

[0044] It should be noted that in the installation scenario of the combined seal 100, the rotating shaft 200 is often located in a narrow cavity, making it difficult for the operator to directly touch the docking sleeve 1 for position adjustment or fixation. However, the connecting rod 4, which extends axially, can serve as an operating extension arm, allowing the operator to easily control the axial sliding and circumferential positioning of the docking sleeve 1 from outside the cavity by holding or applying force to the connecting rod 4. This significantly reduces the difficulty of operation in a narrow space and avoids interference between the hand and the inner wall of the cavity or other components. At the same time, the connecting rod 4 can provide stable axial support for the docking sleeve 1. Especially after the docking sleeve 1 is fitted onto the connecting section 201 of the key 2011 of the rotating shaft 200, the connecting rod 4 can be used to control the movement of the docking sleeve 1 towards the sealing mating section 202, ensuring that the positioning mating surface 12 of the outer wall of the docking sleeve 1 is precisely aligned with the positioning surface 2021 of the sealing mating section 202, forming a continuous and smooth transition surface, laying the foundation for the sliding installation of the combined seal 100.

[0045] Understandably, the number and length of connecting rod 4 can be flexibly adjusted according to actual operational needs to further improve the tool's adaptability and flexibility of use.

[0046] In the above embodiments, see Figures 5 to 9 The connecting rod 4 shown is provided with a relief hole 41 at one end of the connecting sleeve 1, and the relief hole 41 communicates with the inner wall cavity of the connecting sleeve 1.

[0047] Here, by providing a clearance hole 41 at one end of the connecting rod 4 that communicates with the cavity inside the connecting sleeve 1, when the connecting sleeve 1 is fitted onto the connecting section 201 of the key 2011 of the rotating shaft 200, a space is provided for the end of the connecting section 201 of the key 2011 that extends beyond the connecting sleeve 1. This avoids interference between the end of the rotating shaft 200 and the connecting rod 4, which would hinder the smooth sliding of the connecting sleeve 1 along the axial direction of the rotating shaft 200. This ensures that the connecting sleeve 1 can be accurately moved to the position where it mates with the sealing section 202.

[0048] In the above embodiments, see Figures 5 to 9 The axial length of the ejector sleeve 3 shown is greater than the axial length of the mating sleeve 1. The end of the ejector sleeve 3 away from the sealing mating section 202 extends to the outside of the mating sleeve 1 and is sleeved on at least part of the connecting rod 4. The ejector sleeve 3 can slide along the axial path formed by the connecting rod 4 and the mating sleeve 1.

[0049] Here, by setting the axial length of the ejector sleeve 3 to be greater than the axial length of the mating sleeve 1, and extending one end away from the sealing section 202 to the outside of the mating sleeve 1 and fitted onto at least part of the connecting rod 4, the coaxiality and stability of the ejector sleeve 3 during sliding can be improved. This effectively prevents radial offset or tilting of the ejector sleeve 3 during the pushing of the combined seal 100, ensuring that the thrust is always transmitted axially and guaranteeing that the combined seal 100 slides smoothly along the transition surface. At the same time, by setting the ejector sleeve 3 to extend to the outside of the mating sleeve 1 and fitted onto the connecting rod 4, the operable stroke of the ejector sleeve 3 is extended. Even if the combined seal 100 is initially fitted onto the mating sleeve 1 near the sealing section 202, the operator can apply force by pushing the extended section of the ejector sleeve 3 from the outside away from the narrow cavity, without having to operate deep inside the cavity, further reducing the difficulty of operation in a narrow space.

[0050] In the above embodiments, see Figures 5 to 9 The connecting rod 4 shown is provided with a limiting pin 42 on its outer wall. The ejector sleeve 3 is provided with a limiting groove at the position of the limiting pin 42. The limiting groove extends along the axial direction of the ejector sleeve 3. The limiting pin 42 can slide into the limiting groove. The limiting groove is used to cooperate with the limiting pin 42 to limit the travel of the ejector sleeve 3 along the axial direction.

[0051] Here, by setting a limiting pin 42 on the outer wall of the connecting rod 4 and opening a limiting groove extending axially at the corresponding position of the ejector sleeve 3, the limiting pin 42 is allowed to slide into the limiting groove and cooperate in limiting, which can limit the axial sliding stroke of the ejector sleeve 3. This avoids the ejector sleeve 3 from sliding excessively towards the sealing mating section 202, which would cause the positioning ring 101 to collide and be damaged with the positioning surface 2021 of the sealing mating section 202 due to excessive force when pushing the combined seal 100, or the rubber seal 104 to be excessively squeezed and deformed. It also prevents the ejector sleeve 3 from detaching from the support of the docking sleeve 1 and the connecting rod 4 when sliding away from the sealing mating section 202, thus avoiding the tool parts falling off and affecting the installation process.

[0052] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0053] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. An AC motor-driven hydraulic pump combined seal installation tool, wherein a rotating shaft is provided with a keyed connecting section and a sealing mating section sequentially along the installation direction of the combined seal, and the diameter of the keyed connecting section is smaller than the diameter of the sealing mating section; a key is provided on the side of the keyed connecting section, and two positioning surfaces are provided on the side of the sealing mating section near the end of the keyed connecting section for clearance mating with the positioning mating surface of the combined seal, the two positioning surfaces are arranged radially opposite to each other and parallel to each other, both being vertical planes extending axially along the rotating shaft, and one of the positioning surfaces is arranged axially opposite to the key along the rotating shaft, characterized in that... The installation tool includes: A mating sleeve is provided, the inner diameter of which is adapted to the outer diameter of the key connecting section, and the outer diameter of which is adapted to the outer diameter of the sealing mating section. The inner wall of the mating sleeve has a positioning groove extending axially along the sleeve, allowing the key to slide into the positioning groove for circumferential positioning of the mating sleeve and the key connecting section. The outer wall of the mating sleeve has two positioning mating surfaces, which are radially opposite to each other and parallel to each other. Both are vertical planes extending axially along the sleeve and can respectively mate with the two positioning surfaces of the sealing mating section for axial alignment. The mating sleeve, through circumferential positioning with the key connecting section and axial alignment with the sealing mating section, forms a continuous and smooth transition surface between its outer wall and the outer wall of the sealing mating section, allowing the combined seal fitted on the mating sleeve to slide along the transition surface and be installed into the sealing mating section.

2. The AC motor driven hydraulic pump combination sealing installation tool according to claim 1, characterized in that, At least two positioning grooves are provided, and the two positioning grooves are arranged opposite each other along the radial direction of the docking sleeve.

3. The AC motor driven hydraulic pump combination sealing installation tool according to claim 1, characterized in that, It also includes a guide sleeve detachably connected to the docking sleeve, the outer diameter of the guide sleeve being adapted to the outer diameter of the docking sleeve, and the guide sleeve having at least one section of a variable diameter structure, the diameter of which gradually decreases along the direction from near the docking sleeve to away from the docking sleeve, so as to guide the combined seal into the docking sleeve.

4. The AC motor driven hydraulic pump combination sealing installation tool according to claim 3, characterized in that, The guide sleeve and the docking sleeve are detachably connected by an insertion fit. The guide sleeve has an insertion section at one end near the docking sleeve. The outer diameter of the insertion section is adapted to the inner diameter of the docking sleeve. The insertion section can be inserted axially into the end of the docking sleeve.

5. The AC motor driven hydraulic pump combination sealing installation tool according to claim 4, characterized in that, The outer wall of the insertion section is provided with a positioning pin, which is used to slide into the positioning groove on the inner wall of the docking sleeve along the axial direction of the docking sleeve.

6. The AC motor driven hydraulic pump combination sealing installation tool according to claim 1, characterized in that, It also includes an ejector sleeve, which is fitted onto the mating sleeve and can slide along the axial direction of the mating sleeve. The ejector sleeve is used to push the combined seal along the transition surface to the sealing mating section.

7. The AC motor driven hydraulic pump combination sealing installation tool according to claim 6, characterized in that, It also includes at least one connecting rod, which is connected to the end of the mating sleeve away from the sealing mating section, and the connecting rod extends axially along the mating sleeve.

8. The AC motor driven hydraulic pump combination sealing installation tool according to claim 7, characterized in that, The connecting rod has a clearance hole at one end that connects to the docking sleeve, and the clearance hole communicates with the inner wall cavity of the docking sleeve.

9. The AC motor driven hydraulic pump combination sealing installation tool according to claim 7, characterized in that, The axial length of the ejector sleeve is greater than the axial length of the mating sleeve. The end of the ejector sleeve away from the sealing mating section extends to the outside of the mating sleeve and is sleeved on at least part of the connecting rod. The ejector sleeve can slide along the axial path formed by the connecting rod and the mating sleeve.

10. The AC motor driven hydraulic pump combination sealing installation tool according to claim 9, characterized in that, The outer wall of the connecting rod is provided with a limiting pin, and the ejector sleeve is provided with a limiting groove relative to the position of the limiting pin. The limiting groove extends along the axial direction of the ejector sleeve, and the limiting pin can slide into the limiting groove. The limiting groove is used to cooperate with the limiting pin to limit the axial sliding stroke of the ejector sleeve.

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