Pressing tool and pressing method thereof

Abstract

The embodiment of the application provides a press-fitting tool and a press-fitting method thereof, and a positioning sleeve is located inside a gear box node mounting hole. A thread is arranged on the inner circle of the positioning sleeve. The top end and the tail end of a screw rod are provided with threads. The top end of the screw rod is screwed into the inner side of the positioning sleeve and extends to the outer side of the positioning sleeve. A safety nut is screwed into the top end of the screw rod from the outer side of the positioning sleeve and is in contact with the positioning sleeve. A pressure sleeve is sleeved on the screw rod, and a gap is left between the pressure sleeve and the positioning sleeve, and the gap is used for placing a rubber bushing. A hydraulic oil cylinder penetrates into the screw rod and is in contact with the pressure sleeve. The hydraulic oil cylinder is connected with a hydraulic pump, and a pressure gauge is arranged at the connection position of the hydraulic pump and the hydraulic oil cylinder. A locking plate is screwed into the tail end of the screw rod and presses the hydraulic oil cylinder. The application can realize horizontal direction press-fitting of the rubber bushing.

Description

Technical Field

[0001] This application relates to the field of rail transit, and in particular to a pressing tool and pressing method thereof. Background Technology

[0002] With the development of the world economy, transportation has become increasingly important, and rail vehicles occupy an important position and play an increasingly important role in transportation. Common rail vehicles include traditional railways, subways, light rail, and trams, while new types of transportation include maglev trains and monorail trains.

[0003] Currently, there are various connection methods between gearboxes and traction motors. One structure involves placing a rubber bushing in the gearbox mounting hole to enhance the buffering and displacement compensation functions between the gearbox and traction motor. However, due to limitations and influences from the wheels, axles, and other structural components, the gearbox mounting hole is often horizontally positioned. Therefore, the rubber bushing can only be horizontally positioned within the gearbox mounting hole. Consequently, the press-fitting process for the rubber bushing differs significantly from traditional press-fitting processes. Traditional press-fitting fixtures are mostly for vertical press-fitting and are not suitable for horizontal press-fitting. Therefore, for equipment requiring horizontal press-fitting, existing fixtures cannot meet the press-fitting requirements. Summary of the Invention

[0004] To address one of the aforementioned technical deficiencies, this application provides a pressing fixture and a pressing method thereof.

[0005] According to a first aspect of the embodiments of this application, a press-fitting fixture is provided, the press-fitting fixture including a hydraulic cylinder, a screw, a locking plate, a pressure sleeve, a positioning sleeve, and a safety nut.

[0006] A positioning sleeve is located inside the gearbox node mounting hole, and the inner ring of the positioning sleeve is threaded.

[0007] The screw has threads at both its top and bottom ends. The top end of the screw is screwed into the inside of the positioning sleeve and extends to the outside of the positioning sleeve.

[0008] The safety nut is screwed in from the outside of the positioning sleeve to the top of the screw and contacts the positioning sleeve;

[0009] A pressure sleeve is fitted onto the screw, with a gap between it and the positioning sleeve, the gap being used to place a rubber bushing.

[0010] A hydraulic cylinder is inserted into the screw and contacts the pressure sleeve. The hydraulic cylinder is connected to a hydraulic pump, and a pressure gauge is installed at the connection between the hydraulic pump and the hydraulic cylinder.

[0011] The locking plate is screwed into the end of the screw and presses against the hydraulic cylinder.

[0012] According to a second aspect of the embodiments of this application, a pressing method is provided, the method comprising:

[0013] Place the positioning sleeve inside the gearbox node mounting hole;

[0014] Screw the screw into the positioning sleeve, and screw the safety nut into the screw until the safety nut contacts the positioning sleeve;

[0015] With the marked side of the rubber bushing facing away from the positioning sleeve, insert it into the screw and place the end face of the pressure sleeve against the side of the outer ring of the rubber bushing.

[0016] Connect the hydraulic pump, hydraulic cylinder and pressure gauge, insert the hydraulic cylinder into the screw and compact the pressure sleeve and rubber bushing along the axial direction;

[0017] Screw the locking plate into the screw and press it into the hydraulic cylinder;

[0018] The hydraulic pump pressurizes the hydraulic cylinder, pushing the rubber bushing into the gearbox node mounting hole. The pressure value on the pressure gauge is observed. When the pressure value on the pressure gauge changes abruptly, the pressurization is stopped, and the tooling is removed after maintaining the pressure for a certain period of time.

[0019] The pressing fixture and pressing method provided in this application embodiment can meet the horizontal pressing requirements. The connection relationship between the positioning sleeve, the pressure sleeve, and the screw can ensure good coaxiality, thereby ensuring that when the hydraulic cylinder continuously pushes the pressure sleeve forward, the rubber bushing can maintain stable axial movement without deviation, ensuring the smooth execution of the pressing process. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a schematic diagram of the pressing tooling provided in Embodiment 1 of this application;

[0022] Figure 2 This is a schematic diagram of the rubber bushing structure;

[0023] Figure 3 for Figure 2 A sectional view;

[0024] Figure 4 A schematic diagram of the mounting holes for the gearbox nodes;

[0025] Figure 5This is a schematic diagram showing the assembly of the rubber bushing with the gearbox mounting hole.

[0026] Figure 6 This is a schematic diagram of the positioning sleeve.

[0027] Figure 7 This is a schematic diagram of the pressure sleeve structure;

[0028] Figure 8 This is a schematic diagram of the assembly of a hydraulic pump, hydraulic cylinder, and pressure gauge.

[0029] Figure 9 This is a schematic diagram of the locking plate.

[0030] Figure 10 This is a schematic diagram of the screw structure;

[0031] Figure 11 This is a schematic diagram of the assembly of the press-fitting tooling and the gearbox node mounting holes;

[0032] Figure 12 This is a schematic diagram of the assembly of a mounting sleeve and a gearbox node mounting hole;

[0033] Figure 13 This is a schematic diagram of the assembly of another type of mounting sleeve and elastic retaining ring;

[0034] Figure 14 This is a schematic diagram of the assembly of another type of mounting sleeve with the gearbox node mounting hole;

[0035] Figure 15 This is a schematic diagram of the assembly of another type of mounting sleeve and pressure sleeve.

[0036] Figure label:

[0037] 1. Hydraulic cylinder; 2. Screw; 3. Locking plate; 4. Pressure sleeve; 5. Positioning sleeve; 6. Safety nut; 7. Gearbox node mounting hole; 8. Rubber bushing; 9. Inner ring; 10. Outer ring; 11. Raised structure; 12. Hydraulic pump; 13. Pressure gauge; 14. Flat end; 15. Mounting sleeve; 16. Elastic retaining ring; 17. Cylinder wall; 18. Elastic retaining ring groove; 19. Mounting step; 20. Groove. Detailed Implementation

[0038] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0039] Example 1

[0040] Figures 1 to 15 As shown, this embodiment proposes a press-fitting fixture, such as... Figure 1 As shown, the press-fitting fixture includes a hydraulic cylinder 1, a screw 2, a locking plate 3, a pressure sleeve 4, a positioning sleeve 5, and a safety nut 6. In this embodiment, the positioning sleeve 5 provides axial and radial positioning, and the screw 2 connects the positioning sleeve 5, the hydraulic cylinder 1, the pressure sleeve 4, and the locking plate 3. The hydraulic cylinder 1 pushes the pressure sleeve 4 to place the rubber bushing 8 into the gearbox node mounting hole 7.

[0041] Specifically, in this embodiment, the positioning sleeve 5 is located inside the gearbox node mounting hole 7. The inner ring 9 of the positioning sleeve 5 is threaded. Both the top and bottom ends of the screw 2 are threaded. The top end of the screw 2 is screwed into the positioning sleeve 5 from the inside and extends to the outside of the positioning sleeve 5. The safety nut 6 is screwed into the top end of the screw 2 from the outside of the positioning sleeve 5 and contacts the positioning sleeve 5. The pressure sleeve 4 is fitted on the screw 2, with a gap between it and the positioning sleeve 5, which is used to place the rubber bushing 8. The hydraulic cylinder 1 is inserted into the screw 2 and contacts the pressure sleeve 4. The hydraulic cylinder 1 is connected to a hydraulic pump 12, and a pressure gauge 13 is provided at the connection between the hydraulic pump 12 and the hydraulic cylinder 1. The locking plate 3 is screwed into the end of the screw 2 and presses against the hydraulic cylinder 1.

[0042] More specifically, in this embodiment, the rubber bushing 8 is as follows: Figure 2 and Figure 3 As shown, it is mainly divided into two parts: an inner ring 9 and an outer ring 10, with the inner ring 9 being longer than the outer ring 10. The structure of the gearbox node mounting hole 7 is as follows. Figure 4 As shown, the rubber bushing 8 is positioned at the gearbox node mounting hole 7. Figure 5 As shown. A mounting step 19 can be provided inside the gearbox node mounting hole 7. This mounting step 19 ensures the axial position of the rubber bushing 8 within the gearbox node mounting hole 7. A raised structure 11 is provided on the side of the positioning sleeve 5 near the gearbox node mounting hole 7, as shown. Figure 6 As shown. The outer diameter of the protrusion 11 is in a small clearance fit with the inner diameter of the mounting step 19 of the gearbox node mounting hole 7. Thus, the positioning sleeve 5 can be placed inside the gearbox node mounting hole 7, and the protrusion 11 of the positioning sleeve 5 and the mounting step 19 of the gearbox node mounting hole 7 are used to achieve axial and radial positioning.

[0043] A through hole is provided at the center of the positioning sleeve 5, and the inner ring 9 of the through hole has a threaded structure. The top end of the threaded screw 2 is screwed into the positioning sleeve 5, and a safety nut 6 is screwed into the top end of the screw 2 and made to fit snugly against the positioning sleeve 5, thereby achieving the connection between the positioning sleeve 5 and the screw 2. The safety nut 6 also prevents danger caused by excessive pressure.

[0044] The rubber bushing 8 is located between the positioning sleeve 5 and the pressure sleeve 4, with the marked side of the rubber bushing 8 facing the pressure sleeve 4. The inner diameter of the cylinder wall 17 of the pressure sleeve 4 is larger than the outer diameter of the inner ring 9 of the rubber bushing 8, so that the end face of the pressure sleeve 4 rests against the side of the outer ring 10 of the rubber bushing 8.

[0045] Hydraulic cylinder 1 is connected to hydraulic pump 12 and pressure gauge 13, such as Figure 8 As shown, pressure can be pumped to the hydraulic cylinder 1 by the hydraulic pump 12, either manually or automatically. The pressure gauge 13 can display the pressure value during the process of the hydraulic pump 12 pressurizing the hydraulic cylinder 1 in real time. The hydraulic cylinder 1 is inserted into the screw 2 and abuts against the pressure sleeve 4 along the axial direction, thereby compacting the rubber bushing 8.

[0046] The locking plate 3 has threaded holes, such as Figure 9 As shown. The locking plate 3 is screwed into the threaded end through the threaded hole and presses against the hydraulic cylinder 1. The end of the screw 2 can be configured as a flat-mouth 14 structure, such as... Figure 10 As shown, this allows for a tighter connection between the screw 2, pressure sleeve 4, positioning sleeve 5, and locking plate 3 through the application of external force.

[0047] In this embodiment, the protruding structure 11 of the positioning sleeve 5 and the threaded through hole at the center have good coaxiality. Furthermore, the protruding structure 11 of the positioning sleeve 5 and the mounting step 19 of the gearbox node mounting hole 7 are fitted with a small clearance, thus ensuring high coaxiality after assembly of the positioning sleeve 5 and the gearbox node mounting hole 7. Both ends of the screw 2 and the positioning sleeve 5 use fine threads, resulting in high assembly precision. After the positioning sleeve 5 and screw 2 are assembled, it is also possible to ensure that the screw 2 and the gearbox node mounting hole 7 remain coaxial. Simultaneously, a small clearance fit can be used between the screw 2, the inner ring 9 of the rubber bushing 8, and the through hole on the pressure sleeve 4. After the rubber bushing 8 and screw 2 are assembled, the rubber bushing 8 remains coaxial with the pressure sleeve 4 and the screw 2, thereby ensuring that the rubber bushing 8 and the gearbox node mounting hole 7 are coaxial and preventing damage during press-fitting.

[0048] After the press-fit fixture is assembled, the screw 2, rubber bushing 8, positioning sleeve 5, and pressure sleeve 4 have good coaxiality. The locking plate 3 and positioning sleeve 5 are both tightened, close to the hydraulic cylinder 1 and gearbox node mounting hole 7, respectively. Using the hydraulic pump 12, the rod of the hydraulic cylinder 1 slowly extends. At this time, the hydraulic cylinder 1 pushes the pressure sleeve 4, and the pressure sleeve 4 pushes the rubber bushing 8. The rubber bushing 8 and gearbox node mounting hole 7 have a small clearance fit. Therefore, axial resistance will be generated when the rubber bushing 8 is pressed into the gearbox node mounting hole 7. When the cylinder of the hydraulic cylinder 1 continues to push the pressure sleeve 4 forward, the threaded connection between the locking plate 3, positioning sleeve 5, and screw 2, which is mounted on one end of the screw 2 and the positioning sleeve 5 on the other end, can withstand the supporting force. The cylinder of the hydraulic cylinder 1 will continue to push the pressure sleeve 4 forward, and the pressure sleeve 4 and rubber bushing 8 will enter the gearbox node mounting hole 7. During the pressing process, observe the pressure value of pressure gauge 13. When the pressure value rises sharply, it indicates that the outer ring 10 of rubber bushing 8 is in contact with the mounting step 19 of gearbox node mounting hole 7, that is, the pressing is in place.

[0049] Furthermore, the press-fitting fixture proposed in this embodiment also includes a mounting sleeve 15. This mounting sleeve 15 is mainly used for mounting the elastic retaining ring 16. The elastic retaining ring 16 is located on the side opposite to the mounting step 19 of the gearbox node mounting hole 7. An elastic retaining ring groove 18 can be formed in the gearbox node mounting hole 7 to accommodate the elastic retaining ring 16. The combined action of the elastic retaining ring 16 and the mounting step 19 ensures the accurate positioning of the rubber bushing 8 in both the axial and radial directions.

[0050] Specifically, the mounting sleeve 15 is located outside the gearbox node mounting hole 7. The outer surface of the mounting sleeve 15 has a step extending towards the gearbox node mounting hole 7, and the inner surface of the step is in a small clearance fit with the outer surface of the gearbox node mounting hole 7. A through hole is provided inside the mounting sleeve 15 for placing the elastic retaining ring 16. The diameter of the through hole is larger than the outer diameter of the pressure sleeve 4.

[0051] More specifically, this embodiment proposes two structures for the mounting sleeve 15 to achieve the installation of the elastic retaining ring 16. One is as follows: Figure 12 As shown, the diameter of the through hole in the mounting sleeve 15 gradually decreases from the side furthest from the gearbox node mounting hole 7 to the side closest to the gearbox node mounting hole 7. Furthermore, the diameter of the through hole in the mounting sleeve 15 furthest from the gearbox node mounting hole 7 is larger than the outer diameter of the pressure sleeve 4, while the diameter of the through hole in the mounting sleeve 15 closest to the gearbox node mounting hole 7 is smaller than the inner diameter of the gearbox node mounting hole 7. In this way, the pressure sleeve 4 can be inserted from the end with the larger diameter, pushing the elastic retaining ring 16 into the gearbox node mounting hole 7 to achieve the installation of the elastic retaining ring 16.

[0052] Secondly, such as Figures 13 to 15 As shown, a groove 20 is formed in the through hole of the mounting sleeve 15 near the gearbox node mounting hole 7. The diameter of the through hole of the mounting sleeve 15 is larger than the outer diameter of the pressure sleeve 4, and the diameter of the groove 20 is smaller than the inner diameter of the gearbox node mounting hole 7. When installing the elastic retaining ring 16, the elastic retaining ring 16 is first placed in the groove 20, and then pushed into the gearbox node mounting hole 7 by the pressure sleeve 4 to achieve the installation of the elastic retaining ring 16.

[0053] This embodiment can meet the requirements of horizontal pressing. The connection between the positioning sleeve 5, the pressure sleeve 4 and the screw 2 can ensure good coaxiality, thereby ensuring that when the hydraulic cylinder 1 continuously pushes the pressure sleeve 4 forward, the rubber bushing 8 can maintain stable axial movement without deviation, ensuring the smooth execution of the pressing process.

[0054] Example 2

[0055] This embodiment proposes a press-fitting method, which includes:

[0056] Place the positioning sleeve 5 inside the gearbox node mounting hole 7;

[0057] Screw the screw 2 into the positioning sleeve 5, and screw the safety nut 6 into the screw 2 until the safety nut 6 contacts the positioning sleeve 5;

[0058] The rubber bushing 8 is inserted into the screw 2 with the marked side facing away from the positioning sleeve 5, and the end face of the pressure sleeve 4 is pressed against the side of the outer ring 10 of the rubber bushing 8.

[0059] Connect the hydraulic pump 12, the hydraulic cylinder 1 and the pressure gauge 13, insert the hydraulic cylinder 1 into the screw 2 and press the pressure sleeve 4 and the rubber bushing 8 axially;

[0060] Screw the locking plate 3 into the screw 2 and press it into the hydraulic cylinder 1;

[0061] Hydraulic pump 12 pressurizes hydraulic cylinder 1, pushing rubber bushing 8 into gearbox node mounting hole 7. The pressure value of pressure gauge 13 is observed. When the pressure value of pressure gauge 13 changes abruptly, pressurization is stopped, and the tooling is removed after maintaining pressure for a certain period of time.

[0062] Specifically, the pressing method proposed in this embodiment is based on the pressing fixture proposed in Embodiment 1. The specific composition of the pressing fixture can be referred to the content described in Embodiment 1, and will not be repeated in this embodiment.

[0063] In practical application, the pressing method of this embodiment allows the initial hydraulic cylinder 1 to push the rubber bushing 8 relatively slowly, while constantly monitoring the pressure value of the pressure gauge 13 during the pressing process. When the pressure value of the pressure gauge 13 rises sharply, it indicates that the rubber bushing 8 has been pushed into place, and pressurization should be stopped immediately. After maintaining pressure for a period of time, the tooling should be removed.

[0064] Furthermore, this embodiment also allows for the installation of the elastic retaining ring 16. The principle is to first compress the elastic retaining ring 16 to a size smaller than the inner diameter of the gearbox node mounting hole 7, and then install it. This embodiment provides two installation methods.

[0065] The first method is to use a tapered sleeve as the mounting sleeve 15, and use a pressure sleeve 4 to gradually push the elastic retaining ring 16 into the inner hole of the tapered sleeve. As the pressure sleeve 4 is pushed in, the outer diameter of the elastic retaining ring 16 gradually decreases until the outer diameter of the elastic retaining ring 16 is smaller than the inner diameter of the gearbox node mounting hole 7. Then, continue to use the pressure sleeve 4 to push it in until the installation position is reached.

[0066] The second method involves manually screwing the elastic retaining ring 16 into the grooved step of the mounting sleeve 15, and then using the pressure sleeve 4 to press the elastic retaining ring 16 into the gearbox node mounting hole 7. This method is essentially no different from the first method, except that the form of the mounting sleeve 15 has been changed.

[0067] 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", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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.

[0068] 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 at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] 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 part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction 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.

[0070] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0071] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A pressing tool, characterized in that, The press-fitting fixture includes a hydraulic cylinder, a screw, a locking plate, a pressure sleeve, a positioning sleeve, and a safety nut. A positioning sleeve is located inside the gearbox node mounting hole, and the inner ring of the positioning sleeve is threaded. The screw has threads at both its top and bottom ends. The top end of the screw is screwed into the inside of the positioning sleeve and extends to the outside of the positioning sleeve. The safety nut is screwed in from the outside of the positioning sleeve to the top of the screw and contacts the positioning sleeve; A pressure sleeve is fitted onto the screw, with a gap between it and the positioning sleeve, the gap being used to place a rubber bushing. A hydraulic cylinder is inserted into the screw and contacts the pressure sleeve. The hydraulic cylinder is connected to a hydraulic pump, and a pressure gauge is installed at the connection between the hydraulic pump and the hydraulic cylinder. The locking plate is screwed into the end of the screw and presses against the hydraulic cylinder; The press-fitting fixture also includes a mounting sleeve located outside the gearbox node mounting hole. The outer surface of the mounting sleeve has a step extending toward the gearbox node mounting hole, and the inner surface of the step is in close clearance fit with the outer surface of the gearbox node mounting hole. The mounting sleeve has a through hole for placing an elastic retaining ring, and the diameter of the through hole is larger than the outer diameter of the pressure sleeve. The elastic retaining ring is pushed into the gearbox node mounting hole through the pressure sleeve.

2. The press-fitting fixture according to claim 1, characterized in that, The positioning sleeve has a raised structure on the side near the gearbox node mounting hole, and the raised structure extends into the inside of the gearbox node mounting hole.

3. The press-fitting fixture according to claim 1, characterized in that the rubber bushing includes an inner ring and an outer ring, the outer ring is sleeved outside the inner ring, and the inner diameter of the positioning sleeve wall is larger than the outer diameter of the inner ring of the rubber bushing.

4. The press-fitting fixture according to claim 1, characterized in that, The locking plate has a threaded hole, and the locking plate is screwed into the end of the screw through the threaded hole and presses against the hydraulic cylinder.

5. The press-fitting fixture according to claim 1, characterized in that, The end of the screw is provided with a flat opening structure.

6. The press-fitting fixture according to claim 1, characterized in that, The diameter of the through hole of the mounting sleeve gradually decreases from the side away from the gearbox node mounting hole to the side closer to the gearbox node mounting hole. The diameter of the through hole inside the mounting sleeve on the side away from the gearbox node mounting hole is larger than the outer diameter of the pressure sleeve, and the diameter of the through hole inside the mounting sleeve on the side closer to the gearbox node mounting hole is smaller than the inner diameter of the gearbox node mounting hole.

7. The press-fitting fixture according to claim 1, characterized in that, The through hole of the mounting sleeve has a groove on the side near the gearbox node mounting hole. The diameter of the through hole of the mounting sleeve is larger than the outer diameter of the pressure sleeve, and the diameter of the groove is smaller than the inner diameter of the gearbox node mounting hole.

8. The pressing method of the pressing fixture as described in any one of claims 1 to 7, characterized in that, The method includes: Place the positioning sleeve inside the gearbox node mounting hole; Screw the screw into the positioning sleeve, and screw the safety nut into the screw until the safety nut contacts the positioning sleeve; With the marked side of the rubber bushing facing away from the positioning sleeve, insert it into the screw and place the end face of the pressure sleeve against the side of the outer ring of the rubber bushing. Connect the hydraulic pump, hydraulic cylinder and pressure gauge, insert the hydraulic cylinder into the screw and compact the pressure sleeve and rubber bushing along the axial direction; Screw the locking plate into the screw and press it into the hydraulic cylinder; The hydraulic pump pressurizes the hydraulic cylinder, pushing the rubber bushing into the gearbox node mounting hole. The pressure value on the pressure gauge is observed. When the pressure value on the pressure gauge changes abruptly, the pressurization is stopped, and the tooling is removed after maintaining the pressure for a certain period of time.

9. The pressing method according to claim 8, characterized in that, The method further includes: Place the elastic retaining ring in the through hole inside the mounting sleeve; Place the mounting sleeve on the outside of the gearbox node mounting hole; The elastic retaining ring inside the mounting sleeve is pushed into the gearbox node mounting hole by the pressure sleeve.

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