Wheel oiling pressurized loading anti-channeling assembly and method

Abstract

The application relates to a wheel oiling and press-fitting anti-leakage assembly and a use method, which are applied to a wheel oiling and press-fitting process and comprise a tooth side gap sealing tool, a non-tooth side gap sealing gasket, a plugging piece and a wheel axial positioning prompt valve. In the process, the tooth side gap sealing tool is installed between a tooth side end cover of a shaft holding box and a gear sealing ring, the non-tooth side gap sealing gasket is installed between a non-tooth side shaft holding bearing outer ring and the shaft holding box, the wheel axial positioning prompt valve is movably positioned on the non-tooth side shaft holding bearing outer ring through a threaded hole of the shaft holding box and is used for monitoring whether oiling and press-fitting reaches a preset value, and the plugging piece is used for plugging a plurality of pre-plugging holes of the shaft holding box in the oiling and press-fitting process. The application can avoid the problem that, in the process of oiling and press-fitting, press-fitting hydraulic oil enters a shaft holding box bearing chamber, causes bearing grease pollution and dilution quality problems and does not change the original design of a wheel set gear shaft holding box.

Description

Technical Field

[0001] The present invention relates to the technical field of axle box assembly, and in particular to a wheel oiling and press-fitting oil-channeling prevention component and method. Background Art

[0002] Compared with hot pressing and cold pressing, oil injection pressing has a high yield rate, good economy, and relatively low requirements for processing and pressing equipment. It is widely used in the domestic locomotive industry. Figure 1 As shown, since the axle boxes of a large part of products are axially positioned by the wheels, the distance between the wheels and the axle boxes is relatively close. The lubricating oil leaked during the wheel oiling and pressing process can easily pass through the gap of the dynamic seal of the bearing box and flow into the lubrication chamber of the axle box bearing, causing grease dilution and affecting product quality.

[0003] Taking wheel cold pressing as an example, the process flow is as follows: driven gear assembly - axle box tooth side end cover, sealing ring, bearing assembly - tooth side bearing grease injection - axle box assembly - non-tooth side bearing assembly - non-tooth side bearing grease injection - axle box non-tooth side end cover, spacer ring assembly - axle box clearance measurement - non-tooth side wheel press fitting - tooth side wheel press fitting. Figure 1 In the middle, the right side is the tooth side.

[0004] The existing vehicles in operation were originally assembled using the hot-scaling and cold-pressing process, and are performing well. The ideal solution for converting to the oil-injection press process during maintenance is to modify the process steps and improve the process measures without changing the existing product structure, allowing the original hot-scaling and cold-pressed wheelsets to be assembled using the oil-injection press method. This would improve production efficiency, reduce the difficulty of individual wheel axle machining and assembly, and lower the scrap rate.

[0005] However, if the cold wheel pressing process is simply replaced by oil injection pressing, when the non-tooth side wheel is installed, the hydraulic oil for oil injection pressing flowing out of the wheel inner hole will flow into the bearing box of the bearing along the gap between the non-tooth side sealing cover and the spacer ring (such as Figure 2 (The red path in the image). After the wheel is oiled and press-fitted, the oil film remaining between the wheel and axle will gradually be removed due to the pressure between the wheel and axle. The lubricating oil flowing out of the outer side of the wheel can be cleaned with a rag. The part flowing out of the inner side of the wheel will flow out of the unloading groove of the axle again through the gap between the spacer ring and the wheel end face, and flow into the bearing box of the axle box, causing contamination and dilution of the bearing grease, affecting the performance of the bearing.

[0006] Therefore, it is urgent to study a process that can assemble the original hot-mounted and cold-pressed wheelsets by oil injection and press-fitting by changing the process steps and improving the process measures without changing the existing structure of the product. Summary of the Invention

[0007] In response to the technical problems raised above, a wheel oil injection and press-fitting oil channeling prevention component and method are provided.

[0008] The technical means adopted in the present invention are as follows:

[0009] A wheel oil injection and press-fitting anti-oil channeling assembly is used in the oil injection and press-fitting process of wheels, including a tooth side clearance sealing tool, a non-tooth side clearance sealing gasket, a sealing piece and a wheel axial positioning prompt valve. During the process, the tooth side clearance sealing tool is installed between the tooth side end cover of the axle box and the gear sealing ring, the non-tooth side clearance sealing gasket is installed between the non-tooth side bearing outer ring and the axle box, and the wheel axial positioning prompt valve is movably positioned on the non-tooth side bearing outer ring through the threaded hole of the axle box, and is used to monitor whether the oil injection and press-fitting reaches a preset value. The sealing piece is used to block several pre-sealed holes of the axle box during the oil injection and press-fitting process.

[0010] Furthermore, the wheel axial positioning reminder valve includes an externally threaded fixing sleeve, an internally threaded sliding rod, an O-ring, an adjusting nut, an externally threaded sliding rod and a spring. The externally threaded fixing sleeve is fixed in the threaded hole of the axle box through its external thread, and the bottom of the internally threaded sliding rod is pressed into the externally threaded fixing sleeve through the adjusting nut and the spring. O-rings are provided on the outside of the internally threaded sliding rod and the inside of the externally threaded fixing sleeve. An externally threaded sliding rod is provided at the bottom end of the internally threaded sliding rod. During the pressing process, the pressing amount of the non-tooth side wheel is determined based on the moving distance of the externally threaded sliding rod.

[0011] Furthermore, the press-fitting amount of the non-tooth side wheel is confirmed by a dial indicator provided on the outer end surface of the externally threaded sliding rod.

[0012] Furthermore, during the press-fitting process of the non-toothed side wheel, when the dial indicator shows a movement value of 0.2-1.3 mm, the press-fitting of the non-toothed side wheel is stopped.

[0013] Furthermore, the plurality of pre-sealed holes include a monitoring hole for the bearing, a process hole for measuring the axial positioning of the wheel, and an end cover mounting hole.

[0014] Furthermore, the blocking member includes a screw plug and a bolt.

[0015] Furthermore, the non-tooth side gap sealing gaskets are two semicircular sealing gaskets, the outer dimensions of which are the same as the contact surfaces of the non-tooth side sealing cover and the axle box, and bolt holes for connecting the non-tooth side sealing cover and the axle box are left on the sealing gaskets.

[0016] Further, the tooth side gap sealing tooling includes a bolt, a half sealing ring tooling, a sealing ring and a nut, two half sealing ring toolings are used to install the sealing ring outside the gap between the tooth side bearing end cover and the gear sealing ring, and the two ends of the half sealing ring tooling are provided with holes for installing the bolt, and the two half sealing ring toolings are fixed by the bolt and the nut after being butted.

[0017] The application further discloses a use method of the wheel oil injection and press-fitting anti-oil channeling assembly.

[0018] Before the wheel press-fitting, only the tooth side bearing is greased, and the non-tooth side bearing is not temporarily greased;

[0019] The gap between the tooth side bearing box and the driven gear is sealed by the tooth side sealing tooling and the sealing ring, and the gap at the non-tooth side bearing end cover is sealed by the non-tooth side gap sealing gasket;

[0020] The threaded holes of the bearing box and a plurality of pre-blocking holes are blocked by the blocking piece, the bolt and the wheel axial positioning prompt valve;

[0021] Clean air is filled into the bearing chamber through the non-tooth side bearing grease injection hole, and the non-tooth side wheel oil injection and press-fitting are completed at the same time;

[0022] The reading during the press-fitting process is monitored through the dial gauge head on the nut head surface of the wheel axial positioning prompt valve, and the wheel set press-fitting is completed when the preset value is reached;

[0023] The tooth side gap sealing tooling, the blocking piece and the wheel axial positioning prompt valve are removed;

[0024] The bearing grease is added into the bearing chamber through the non-tooth side bearing grease injection hole, and the bearing is rotated at the same time, so that the grease is uniformly distributed on the bearing, and the tooth side wheel press-fitting and subsequent processes are completed.

[0025] Further, the air is compressed air with a pressure of 0.4-0.6 MPa.

[0026] Compared with the prior art, the application has the following advantages: the application can avoid the problem that the press-fitting hydraulic oil enters the bearing chamber of the bearing box and causes the quality problems of bearing grease pollution and dilution during the oil injection and press-fitting process without changing the original design of the wheel set gear bearing box, on the one hand, the design scheme of the wheel set bearing box can be applied to the design scheme of the shunting locomotive with split wheels, thereby reducing the manufacturing cost and R&D cost caused by the redesign, and on the other hand, the production efficiency is improved and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0028] Figure 1 This is the structural diagram of the wheelset gear axle box.

[0029] Figure 2 This is the assembly structure diagram of the non-tooth side-engaging bearing.

[0030] Figure 3 This is the inflation and sealing solution for the press-fitting process of the present invention.

[0031] Figure 4 This is the structural diagram of the wheel axial positioning prompt valve.

[0032] Figure 5 This is the structural diagram of the non-tooth side clearance seal.

[0033] Figure 6 This is the structural diagram of the tooth side clearance sealing tooling.

[0034] Figure 7 It is a process flow chart of the present invention.

[0035] Figure 8 This is an enlarged view of the non-tooth gap seal.

[0036] Figure 9 This is an enlarged view of the tooth side clearance seal.

[0037] In the figure: 1. Bolt; 2. Semi-sealing ring tooling; 3. Sealing ring; 4. Gear side bearing end cover; 5. Gear sealing ring; 6. Nut; 41. Externally threaded fixing sleeve; 42. Internally threaded sliding rod; 43. O-ring; 44. Adjusting nut; 45. Externally threaded sliding rod; 46. Spring. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0042] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0043] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0044] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0045] like Figure 2 As shown, the non-toothed side wheel, spacer ring and end cover are close to each other. It is difficult to seal the position where the arrow flows. First, the gap is small and the seal cannot be removed after it is installed. Second, if this place is blocked and not removed, it will affect the design function of the dynamic seal.

[0046] For this reason, Figure 1 、 Figures 3 to 9 As shown, an embodiment of the present invention discloses a wheel oil injection and press-fitting anti-oil channeling assembly, which is used in the oil injection and press-fitting process of the wheel, and includes a tooth side gap sealing tool, a non-tooth side gap sealing gasket, a sealing piece and a wheel axial positioning prompt valve. During the process, the tooth side gap sealing tool is installed between the tooth side end cover of the axle box and the gear sealing ring, and the non-tooth side gap sealing gasket is installed between the non-tooth side bearing outer ring and the axle box. The wheel axial positioning prompt valve is movably positioned on the non-tooth side bearing outer ring through the threaded hole of the axle box, and is used to monitor whether the oil injection and press-fitting reaches a preset value. The sealing piece is used to block several pre-sealed holes of the axle box during the oil injection and press-fitting process.

[0047] The channels connected to the bearing chamber of the non-tooth side bearing include: the gap between the non-tooth side clearance end cover and the spacer ring, the gap between the non-tooth side end cover and the axle box, the bolt holes, grease injection holes, and screw plug holes on the axle box, and the gap between the tooth side end cover and the gear sealing ring. The present invention seals the through holes and gaps connected to the non-tooth side bearing chamber of the axle box by manufacturing a wheel axial positioning prompt valve, a non-tooth side clearance sealing gasket, a tooth side clearance sealing tool, bolts, screw plugs, etc., leaving only the non-tooth side bearing oil filling hole for inflation, and the gap between the non-tooth side spacer ring and the end cover for air to escape. Since the direction of air escape is opposite to the flow direction of the hydraulic oil during oil injection and press-fitting, the hydraulic oil is prevented from flowing into the non-tooth side axle box bearing chamber through this gap.

[0048] Furthermore, the wheel axial positioning reminder valve includes an externally threaded fixing sleeve 41, an internally threaded sliding rod 42, an O-ring 43, an adjusting nut 44, an externally threaded sliding rod 45 and a spring 46. The externally threaded fixing sleeve is fixed in the threaded hole of the axle box through its external thread, and the bottom of the internally threaded sliding rod is pressed into the externally threaded fixing sleeve through the adjusting nut and the spring. O-rings are provided on the outside of the internally threaded sliding rod and the inside of the externally threaded fixing sleeve. An externally threaded sliding rod is provided at the bottom end of the internally threaded sliding rod. During the pressing process, the pressing amount of the non-tooth side wheel is determined based on the moving distance of the externally threaded sliding rod.

[0049] Furthermore, the press-fitting amount of the non-tooth side wheel is confirmed by a dial indicator provided on the outer end surface of the externally threaded sliding rod.

[0050] Furthermore, during the press-fitting process of the non-toothed side wheel, when the dial indicator shows a movement value of 0.2-1.3 mm, the press-fitting of the non-toothed side wheel is stopped.

[0051] Specifically, during the non-toothed wheel press-fitting process, when the inner side of the wheel hub, carrying the spacer ring, the inner ring of the non-toothed bearing, and the outer ring of the non-toothed bearing, moves, the non-toothed wheel press-fitting is stopped when the dial indicator on the outer end face of the externally threaded sliding rod shows a movement value of 0.2-1.3mm. This wheel axial positioning indicator valve not only indicates the end point of wheel press-fitting but also acts as a seal.

[0052] Furthermore, the plurality of pre-sealed holes include a monitoring hole for the bearing, a process hole for measuring the axial positioning of the wheel, and an end cover mounting hole.

[0053] Furthermore, the blocking member includes a screw plug and a bolt.

[0054] Furthermore, the non-tooth side clearance seals are two semicircular seals with the same dimensions as the contact surface between the non-tooth side seal cover and the axle holder. Bolt holes are provided on the seals to connect the non-tooth side seal cover and the axle holder, allowing them to be clamped with bolts. After the non-tooth side clearance seals are installed, excess material is left outside to facilitate removal from the axle holder after the wheel is press-fitted.

[0055] Furthermore, the tooth side clearance sealing fixture includes a bolt 1, a half sealing ring fixture 2, a sealing ring 3, and a nut 6. The two half sealing ring fixtures install the sealing ring outside the gap between the tooth side bearing end cover 4 and the gear sealing ring 5. Both ends of the half sealing ring fixture are provided with holes for installing bolts. After the two half sealing ring fixtures are connected, they are fixed with bolts and nuts to achieve sealing of the gap between the tooth side bearing housing and the driven gear.

[0056] The present invention also discloses a method for using the wheel oil injection press-fit anti-oil channeling assembly, comprising the following steps:

[0057] Before wheel press-fitting, only grease the gear side bearings and temporarily do not grease the non-gear side bearings;

[0058] The gap between the gear side bearing box and the driven gear is sealed by the gear side sealing tool and the sealing ring, and the gap at the non-gear side bearing end cover is sealed with the non-gear side gap sealing gasket to prevent air from flowing out of the gap when the non-gear side bearing box bearing chamber is inflated.

[0059] Use screw plugs, bolts and wheel axial positioning reminder valves to block the threaded holes of the axle box and several pre-sealed holes to prevent air from flowing out;

[0060] Fill the bearing chamber with clean air through the grease injection hole of the non-tooth side bearing. Figure 2 Except for the gap indicated by the arrow, all other vents and gaps in the axle box have been sealed. At this time, after air is injected into the non-tooth side bearing chamber, only the gap indicated by the arrow flows out. The direction of the airflow is opposite to the flow direction of the hydraulic oil used for oil filling and pressing. The oil filling and pressing of the non-tooth side wheel is completed at the same time as inflation, which will prevent the hydraulic oil from penetrating into the bearing chamber.

[0061] The press-fitting process is monitored by using the dial indicator head on the nut head surface of the wheel axial positioning prompt valve. When the preset value is reached, the wheelset press-fitting is completed. Specifically, when the wheel is pressed against the isolation ring, the non-tooth side bearing moves slightly in the axial direction, which is reflected on the dial indicator through the wheel axial positioning prompt valve. During the press-fitting process, the wheelset press-fitting is completed when the dial indicator shows 0.2-1.3mm.

[0062] Remove the gear side clearance sealing tooling, blocking piece and wheel axial positioning reminder valve;

[0063] Add bearing grease into the bearing chamber from the grease injection hole of the non-tooth side bearing. While adding grease, rotate the bearing to evenly distribute the grease on the bearing, completing the tooth side wheel press fitting and subsequent processes.

[0064] In summary, the present invention is a method of asynchronous greasing, which first adds grease to the axle box on the tooth side, then press-fits the wheel, and finally greases the non-tooth side bearing, so as to increase the pressure in the axle box and the patency of the non-tooth side clearance during the oil injection and press-fitting process.

[0065] Furthermore, the inflation air source is compressed air at 0.4-0.6 MPa. The present invention realizes a wheel oil injection and anti-oil channeling assembly process that can be realized using only a common air source (0.6 MPa) and a small amount of tooling.

[0066] The present invention uses a sealing structure and scheme to seal all ventilation gaps, through holes, and threaded holes in the axle box bearing chamber, leaving an air charging hole to flush air into the bearing chamber, thereby forming a positive pressure inside the axle box and preventing the oil from being injected and pressed into the bearing through the gap near the wheel. A method is provided for changing the process from cold pressing and hot fitting to oil injection and pressing without changing the axial positioning of the gears and wheels relative to the axle box, while ensuring quality and operational safety. A method is provided for changing the process from cold pressing and hot fitting to oil injection and pressing without changing the axial positioning of the gears and wheels relative to the axle box, while ensuring quality and operational safety.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wheel oiling press-fit anti-oil channeling assembly, characterized in that: Applied to the oil injection and press-fitting process of wheels, it includes a tooth side clearance sealing tool, a non-tooth side clearance sealing gasket, a blocking piece, and a wheel axial positioning prompt valve. During the process, the tooth side clearance sealing tool is installed between the tooth side end cover of the axle box and the gear sealing ring, the non-tooth side clearance sealing gasket is installed between the outer ring of the non-tooth side bearing and the axle box, and the wheel axial positioning prompt valve is movably positioned on the outer ring of the non-tooth side bearing through the threaded hole of the axle box to monitor whether the oil injection and press-fitting reaches a preset value. The blocking piece is used to block several pre-blocking holes of the axle box during the oil injection and press-fitting process; The wheel axial positioning prompt valve includes an external threaded fixing sleeve, an internal threaded sliding rod, an O-ring, an adjusting nut, an external threaded sliding rod and a spring. The external threaded fixing sleeve is fixed in the threaded hole of the axle box through its external thread. The bottom of the internal threaded sliding rod is pressed into the external threaded fixing sleeve through the adjusting nut and the spring. The outside of the internal threaded sliding rod and the inside of the external threaded fixing sleeve are provided with O-rings. The bottom end of the internal threaded sliding rod is provided with an external threaded sliding rod. During the press-fitting process, the press-fitting amount of the non-tooth side wheel is determined based on the moving distance of the external threaded sliding rod. The tooth side gap sealing tooling includes bolts, half sealing ring tooling, sealing rings and nuts. The two half sealing ring toolings install the sealing rings outside the gap between the tooth side bearing end cover and the gear sealing ring. Both ends of the half sealing ring tooling are provided with holes for installing bolts. After the two half sealing ring toolings are connected, they are fixed by bolts and nuts.

2. The wheel oil injection press-fit oil channeling prevention assembly according to claim 1, characterized in that: The press-fitting amount of the non-tooth side wheel is confirmed by a dial indicator provided on the outer end surface of the externally threaded sliding rod.

3. The wheel oil injection press-fit anti-oil channeling assembly according to claim 1, characterized in that: During the press-fitting process of the non-toothed side wheel, when the dial indicator shows a movement value of 0.2-1.3mm, stop press-fitting the non-toothed side wheel.

4. The wheel oil injection press-fit anti-oil channeling assembly according to claim 1, characterized in that: The plurality of pre-sealed holes include a monitoring hole for the bearing, a process hole for measuring the axial positioning of the wheel, and an end cover mounting hole.

5. The wheel oil injection press-fit anti-oil channeling assembly according to claim 1, characterized in that: The blocking piece includes a screw plug and a bolt.

6. The wheel oil injection press-fit anti-oil channeling assembly according to claim 1, characterized in that: The non-tooth side gap sealing gaskets are two semicircular sealing gaskets, and the outer dimensions are the same as the contact surfaces of the non-tooth side sealing cover and the axle box. Bolt holes for connecting the non-tooth side sealing cover and the axle box are left on the sealing gaskets.

7. A method for using the wheel oil injection and press-fit oil channeling prevention assembly according to any one of claims 1 to 6, characterized in that: The steps include: Before wheel press-fitting, only grease the gear side bearings and temporarily do not grease the non-gear side bearings; The gap between the gear side bearing housing and the driven gear is sealed by the gear side sealing fixture and sealing ring, and the gap at the non-gear side bearing end cover is sealed by the non-gear side gap sealing gasket; Use screw plugs, bolts and wheel axial positioning reminder valves to plug the threaded holes and several pre-sealed holes of the axle box; Fill the bearing chamber with clean air through the grease injection hole of the non-toothed side bearing, and simultaneously complete the oil injection and press-fitting of the non-toothed side wheel; The press-fitting process is monitored by hitting the dial indicator on the nut head surface of the wheel axial positioning prompt valve. When the reading reaches the preset value, the wheelset press-fitting is completed. Remove the gear side clearance sealing tooling, blocking piece and wheel axial positioning reminder valve; Add bearing grease into the bearing chamber from the grease injection hole of the non-tooth side bearing. While adding grease, rotate the bearing to evenly distribute the grease on the bearing, completing the tooth side wheel press fitting and subsequent processes.

8. The method according to claim 7, characterized in that The inflation gas source is 0.4~0.6MPa compressed air.

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