Auxiliary press-fitting assembly and press-fitting tool

Abstract

The invention provides an auxiliary press-fitting assembly and a press-fitting tool, and belongs to the technical field of locomotive assembly.The auxiliary press-fitting assembly is used for assisting in mounting a gear part on an axle, the auxiliary press-fitting assembly comprises a pressure transmission part and a driving part, the pressure transmission part is provided with a mounting channel used for allowing the axle to be inserted, and the two ends of the pressure transmission part are used for making contact with the gear part and the outside correspondingly; the pressure transmission piece is used for transmitting the axial pressure of the driving piece to the gear piece; the protection part is arranged in the mounting channel, the protection part and the pressure transmission part are coaxially arranged, and the protection part is used for making contact with the axle and isolating the pressure transmission part from the axle; and the connecting piece is connected with the pressure transmission piece and the protection piece, and the connecting piece is used for limiting the axial sliding of the protection piece relative to the pressure transmission piece. According to the auxiliary press-fitting assembly, the surface of the axle can be effectively protected, the coaxiality of the gear piece and the axle can be kept, and the centering performance is good.

Description

TECHNICAL FIELD

[0001] The present application relates to the locomotive assembly technology, and in particular to an auxiliary press-fitting assembly and a press-fitting tool. BACKGROUND

[0002] The gear transmission system is a key structure for locomotive operation, and the gear transmission system includes an axle and a driven gear of the locomotive. The cooperation between the axle and the driven gear directly affects the power transmission effect of the locomotive.

[0003] At present, the cooperation type between the axle and the driven gear is mainly interference fit. The axle and the driven gear are press-fitted by a hydraulic machine. Since the driving stroke of the piston of the hydraulic machine on the driven gear is short, an auxiliary press-fitting component needs to be arranged between the piston and the driven gear to prolong the driving stroke of the piston.

[0004] However, the existing auxiliary press-fitting component cannot guarantee the coaxiality of itself and the axle. When the auxiliary press-fitting component is pushed by the piston, the surface of the axle is easily scratched, which affects the structural strength of the axle. SUMMARY

[0005] The present application provides an auxiliary press-fitting assembly and a press-fitting tool to solve the problem that the auxiliary press-fitting component is easily scratched when pushed by the piston in the related art.

[0006] In one aspect, the present application provides an auxiliary press-fitting assembly for assisting in mounting a gear member on an axle, comprising:

[0007] a pressure transmission member having a mounting channel for inserting the axle, two ends of the pressure transmission member being used for contacting the gear member and an external driving member respectively, the pressure transmission member being used for transmitting the axial pressure of the driving member to the gear member;

[0008] a protection member arranged in the mounting channel, the protection member and the pressure transmission member being coaxially arranged, the protection member being used for contacting the axle and isolating the pressure transmission member and the axle;

[0009] a connecting member connected with the pressure transmission member and the protection member, the connecting member being used for limiting the axial sliding of the protection member relative to the pressure transmission member.

[0010] In some possible implementation manners, the mounting channel has a first port and a second port opposite in the axial direction, an opening size of the first port is greater than an outer diameter size of the protection member, an opening size of the second port is less than the outer diameter size of the protection member, and the protection member is inserted into the mounting channel through the first port.

[0011] In some possible implementation manners, the pressure transmitting member has a first end portion and a second end portion opposite in the axial direction, the first end portion is provided with the first port, the second end portion is provided with the second port, and the connecting member is detachably connected with the first end portion to limit the protective member from being separated from the mounting channel.

[0012] In some possible implementation manners, a protrusion is configured on the second end portion, the protrusion protrudes in a direction away from the first end portion, and the protrusion is used for being embeddedly clamped with a hub of the gear member.

[0013] In some possible implementation manners, the protrusion has a through hole penetrating coaxially with the mounting channel, and an outer wall of the protrusion is gradually tapered in a direction away from the first end portion.

[0014] In some possible implementation manners, the connecting member is a ring-shaped member, and the connecting member is connected with the first end portion through a fastener.

[0015] In some possible implementation manners, a first limiting portion is configured on the first end portion, a second limiting portion is configured on a side of the connecting member corresponding to the first end portion, the first limiting portion is used for being connected with the second limiting portion to block the connecting member from being offset relative to the first end portion in the radial direction.

[0016] In some possible implementation manners, a plurality of fastening holes are configured on the connecting member, the plurality of fastening holes are uniformly arranged along a circumferential direction of the connecting member, and a plurality of fasteners are provided, the fasteners are connected with the fastening holes one by one.

[0017] In some possible implementation manners, an outer wall of the pressure transmitting member is provided with a lifting ring, the pressure transmitting member and the connecting member are metal members, and the protective member is a non-metal member.

[0018] In another aspect, the application provides a press-fitting tool, which comprises a tool body and the auxiliary press-fitting assembly.

[0019] The auxiliary press-fitting assembly and the press-fitting tool provided by the application have the following advantages: in the auxiliary press-fitting assembly, the protective member is arranged in the mounting channel of the pressure transmitting member and directly contacts the surface of the axle, so that the pressure transmitting member and the axle are physically isolated, and the pressure transmitting member is prevented from directly extruding and scraping the surface of the axle, thereby avoiding scratches, fuzzing or indentations caused by the pressure transmitting member on the surface of the axle due to misalignment or eccentricity during the press-fitting process.

[0020] In addition, the connecting piece connects the pressure transmitting piece and the protection piece, so that the pressure transmitting piece and the protection piece form integral motion, avoids the protection piece being rubbed out of the pressure transmitting piece during driving of the driving piece to drive the pressure transmitting piece to move, affects the protection effect, and is beneficial to guarantee the stability of the pressure assembly process. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0022] Figure 1 FIG. 1 is a structural schematic diagram of an auxiliary pressure assembly in an embodiment of the present application;

[0023] Figure 2 FIG. 2 is a structural schematic diagram of a pressure transmitting piece in the auxiliary pressure assembly in an embodiment of the present application; Figure 1

[0024] Figure 3 FIG. 3 is a structural schematic diagram in another perspective view; Figure 2

[0025] Figure 4 FIG. 4 is a structural schematic diagram of a connecting piece in an embodiment of the present application;

[0026] Figure 5 FIG. 5 is a partial structural side view of the auxiliary pressure assembly in an embodiment of the present application;

[0027] Figure 6 FIG. 6 is a structural schematic diagram of a pressure assembly tool in an embodiment of the present application.

[0028] Through the above drawings, the specific embodiments of the present application have been shown, and will be described in more detail hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application by any means, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments.

[0029] REFERENCE SIGNS

[0030] 100-pressure transmitting piece;

[0031] 110-mounting channel;

[0032] 111-first port; 1111-first limiting part; 112-second port; 1121-protruding part; 113-first end part; 114-second end part;

[0033] 200-protection piece;

[0034] 300-connecting piece; 310-fastening hole;

[0035] 400-fastener;

[0036] ​​500 - hanger loop;

[0037] 600 - gear member;

[0038] 700 - axle;

[0039] 800 - drive member. DETAILED DESCRIPTION

[0040] In order to make the objects, technical solutions and advantages of the present application clearer, the following will describe the technical solutions in the embodiments of the present application in detail with reference to the drawings in the preferred embodiments of the present application. Same or similar reference numerals in the drawings represent same or similar components or components with same or similar functions throughout. The described embodiments are part of the embodiments of the present application, not all the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below with reference to the drawings.

[0041] In the description of the present application, it should be noted that unless specifically defined and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0043] The terms "first", "second", "third", "fourth" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0044] Moreover, the terms "comprising" and "including," along with their derivatives, as used herein, are intended to be open-ended and include the possibility of reciting more than the listed steps or components. In addition, the terms "first," "second," and the like, as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Furthermore, the use of the terms "a" and "an" and "the" and "said" and "at least one" and "one or more" in the context of describing the application (especially in the context of claims) are to be interpreted to cover both the singular and plural.

[0045] NJ2 type diesel locomotive is a locomotive product used in harsh environment, which adopts gear transmission to transmit power to wheel pair to drive locomotive running, and the connection between driven gear and axle is interference fit, so that the interference fit is realized by press fitting.

[0046] At present, the axle and the driven gear of the diesel locomotive are press fitted by a hydraulic machine. Since the driving stroke of the piston of the hydraulic machine to the driven gear is short, an auxiliary press fitting part needs to be arranged between the piston and the driven gear to prolong the driving stroke of the piston. However, the existing auxiliary press fitting part cannot guarantee the coaxiality of itself and the axle, and the auxiliary press fitting part is easy to scratch the surface of the axle when it is pushed by the piston, which affects the structural strength of the axle.

[0047] Based on the above description, one or more embodiments of the present application provide an auxiliary press fitting assembly and a press fitting tool. In the auxiliary press fitting assembly, a protection part is arranged in the mounting channel of the pressure transmitting part, the protection part directly contacts the surface of the axle, thereby physically isolating the pressure transmitting part and the axle, preventing the pressure transmitting part from directly extruding and scratching the surface of the axle, and avoiding scratches, fuzzing or indentations on the surface of the axle caused by different shafts or eccentricities of the pressure transmitting part during the press fitting process. In addition, the connecting part connects the pressure transmitting part and the protection part, so that the pressure transmitting part and the protection part form a whole movement, avoiding the protection part being rubbed out of the pressure transmitting part during the movement of the pressure transmitting part driven by the driving part, affecting the protection effect, and being conducive to guaranteeing the stability of the press fitting process.

[0048] The scheme of the embodiments of the present application is described below in combination with the drawings.

[0049] As shown in Figure 1 The auxiliary press fitting assembly provided by the embodiments of the present application is used for assisting the installation of the gear part 600 on the axle 700, and the auxiliary press fitting assembly comprises a pressure transmitting part 100, a protection part 200 and a connecting part 300.

[0050] The pressure transmitting member 100 has a mounting channel 110 for inserting the axle 700, and two ends of the pressure transmitting member 100 are respectively used for contacting the gear member 600 and the external driving member 800, and the pressure transmitting member 100 is used for transmitting the axial pressure of the driving member 800 to the gear member 600; the protection member 200 is arranged in the mounting channel 110, the protection member 200 and the pressure transmitting member 100 are coaxially arranged, and the protection member 200 is used for contacting the axle 700 and isolating the pressure transmitting member 100 and the axle 700; the connecting member 300 is connected with the pressure transmitting member 100 and the protection member 200, and the connecting member 300 is used for limiting the axial sliding of the protection member 200 relative to the pressure transmitting member 100.

[0051] As can be seen from the above description, the auxiliary press-fitting assembly in the embodiment of the application transmits the axial pressure of the driving member 800 to the gear member 600 by using the pressure transmitting member 100, the pressure transmitting member 100 is a rigid member, the protection member 200 arranged in the mounting channel 110 of the pressure transmitting member 100 can physically isolate the direct contact between the pressure transmitting member 100 and the axle 700, thereby avoiding the rigid pressure transmitting member 100 from scratching and damaging the axle 700. In addition, the connecting member 300 connects the pressure transmitting member 100 and the protection member 200, thereby making the pressure transmitting member 100 and the protection member 200 form integral motion, avoiding the protection member 200 from being rubbed out of the pressure transmitting member 100 during the movement of the driving member 800 driving the pressure transmitting member 100, and affecting the protection effect, and being beneficial to ensuring the stability of the press-fitting process.

[0052] The pressure transmitting member 100, the protection member 200 and the connecting member 300 form a modular design, the pressure transmitting member 100 can be selected from high-rigidity materials, the protection member 200 can be selected from wear-resistant materials which are more suitable for protecting the axle 700, and after the protection member 200 is worn, the protection member 200 can be directly replaced without replacing the entire pressure transmitting member 100, which is beneficial to reducing the maintenance cost of the auxiliary press-fitting assembly in the long-term use process.

[0053] In some embodiments, the pressure transmitting member 100 and the connecting member 300 are metal members, and the protection member 200 is a non-metal member. For example, the pressure transmitting member 100 is made of high-strength and high-rigidity materials, such as steel, Cr, CrMo alloy steel or CrMoV, TA tool steel. The protection member 200 is mainly used for isolating and protecting the axle 700 material, and the material hardness of the protection member 200 needs to be lower than the material hardness of the axle 700, and has good wear resistance and low friction coefficient, therefore, the protection member 200 can be made of metal members or non-metal members which can protect the surface of the axle 700, for example, the protection member 200 is made of copper metal or alloy copper material, or engineering plastics such as nylon, ultra-high molecular polyethylene and high-performance polymers, and the application embodiments do not make absolute limitation.

[0054] As Figure 2and Figure 3 As shown, in some embodiments, the mounting channel 110 has a first port 111 and a second port 112 that are opposite each other in the axial direction. The opening size of the first port 111 is larger than the outer diameter of the protective member 200, and the opening size of the second port 112 is smaller than the outer diameter of the protective member 200. The protective member 200 is inserted into the mounting channel 110 through the first port 111.

[0055] In the above embodiment, the mounting channel 110 of the pressure transmitting member 100 is a through hole, and the first port 111 and the second port 112 correspond to the opposite ends of the pressure transmitting member 100, respectively. The portion of the mounting channel 110 corresponding to the second port 112 extends radially inward. The longer the extension length, the smaller the opening size of the second port 112. Here, as long as the opening size of the second port 112 is smaller than the outer diameter of the protective member 200, the protective member 200 cannot be dislodged from the mounting channel 110 at the second port 112.

[0056] Here, the opening size of the first port 111 is larger than the outer diameter of the protective member 200. The first port 111 can serve as an assembly entrance. The protective member 200 enters the installation channel 110 from the first port 111. Since the opening size of the second port 112 is smaller than the outer diameter of the protective member 200, the second port 112 forms a mechanical limiting surface in the axial direction. The protective member 200 is blocked and limited by the second port 112, thus preventing it from leaving the installation channel 110.

[0057] Furthermore, the pressure transmission member 100 has a first end 113 and a second end 114 corresponding to the two ends of the mounting channel 110 in the axial direction. The first end 113 is provided with a first port 111, and the second end 114 is provided with a second port 112. The connector 300 is detachably connected to the first end 113 to prevent the protective member 200 in the mounting channel 110 from leaving the mounting channel 110.

[0058] A connector 300 is disposed at the first end 113 and is detachably connected to the pressure transmission component 100. The connector 300 covers the opening of the first port 111, and its structure includes, but is not limited to, bolt connection, snap ring fixing, or end cap locking. The detachable connection between the connector 300 and the pressure transmission component 100 allows the connector 300 to axially constrain the protective component 200 within the mounting channel 110 on the first port 111 side, effectively preventing the protective component 200 from dislodging from the pressure transmission component 100 during friction by the axle 700. Furthermore, the detachable connection between the connector 300 and the pressure transmission component 100 facilitates regular inspection and maintenance of the protective component 200 by personnel, ensuring the normal operation of the auxiliary pressing assembly.

[0059] Furthermore, such as Figure 3As shown, a protrusion 1121 is constructed on the second end 114. The protrusion 1121 protrudes in a direction away from the first end 113 and is used to engage with the hub of the gear component 600.

[0060] In related technologies, the gear component 600 itself has a hollow hub. The outer diameter of the protrusion 1121 is comparable to the inner diameter of the hub of the gear component 600, thus the protrusion 1121 can be directly fitted into the hub to form an axial connection. In the initial stage of press fitting, the protrusion 1121 on the pressure transmission component 100 can be engaged with the hub first, so that the gear component 600 provides radial constraint for the pressure transmission component 100, ensuring the coaxiality of the pressure transmission component 100, the protective component 200, the axle 700, and the gear component 600, avoiding deflection caused by misalignment of a component during press fitting, thereby helping to prevent the pressure transmission component 100 or the gear component 600 from damaging the surface of the axle 700.

[0061] As an alternative implementation, the protrusion 1121 has a through hole that coaxially penetrates the mounting channel 110, and the outer wall of the protrusion 1121 gradually tapers in a direction away from the first end 113.

[0062] The outermost end face size of the protrusion 1121 is smaller than the inner diameter of the hub of the gear component 600. The outer wall end face of the protrusion 1121 gradually tapers away from the first end 113, forming a guide cone surface. The end face size of the inner end of the gradually tapering protrusion 1121 is larger than the end face size of the outer end. During the process of embedding the protrusion 1121 into the hub of the gear component 600, it can first contact the inner diameter port of the hub and use the structure of the guide cone surface to align and fit. This design can compensate for the manufacturing tolerances of the protrusion 1121 and the gear component 600, thereby facilitating the smooth guidance of the protrusion 1121 into the hub, reducing the difficulty and resistance of the hub fitting of the protrusion 1121 and the gear component 600, and avoiding hard collision between the protrusion 1121 and the hub of the gear component 600, which would damage the gear component 600.

[0063] It should be noted that in the embodiments of this application, the orientation description of "inner end" and "outer end" is based on the pressure transmission member 100. The two openings at both ends of the pressure transmission member 100 are the outer end, and the middle part of the pressure transmission member 100 is the inner end.

[0064] like Figure 4 and Figure 5 As shown, in some embodiments, the connector 300 is a ring-shaped component, and the connector 300 is connected to the first end 113 by a fastener 400.

[0065] Here, the connector 300 can be made of the same material as the pressure transmitter 100 to avoid affecting the pressure transmission effect of the pressure transmitter 100. The internal opening size of the connector 300 is larger than the outer diameter of the axle 700, but smaller than the outer diameter of the protective member 200. This arrangement ensures that the connector 300 covering the first port 111 can form a stable axial constraint on the protective member 200.

[0066] In this embodiment, the length of the protective member 200 is equivalent to or slightly less than the length of the pressure transmission member 100. That is, when the connector 300 covers the first port 111, it abuts against one end of the protective member 200. The protective member 200 cannot be displaced in the axial direction in the mounting channel 110. The axial fixation of the protective member 200 in the mounting channel 110 can effectively and more effectively protect the surface of the axle 700 and prevent the pressure transmission member 100 from directly contacting the axle 700 due to gaps in the protective member 200 in the mounting channel 110.

[0067] Specifically, a plurality of fastening holes 310 are evenly spaced along the circumference of the end face of the annular plate. A fastener 400 passes through each of the fastening holes 310, thereby fixing the connector 300 to the first end 113. For example, a plurality of threaded holes are spaced along the circumference of the first end 113. The number and position of the fastening holes 310 on the connector 300 correspond to the number of threaded holes. The fastener 400 can be a hexagon socket head cap screw, or a stud and nut, etc. The fastener 400 passes through the fastening hole 310 and is screwed into the threaded hole. By applying a tightening torque, the connector 300 is pressed against the first end 113, preventing the protective member 200 in the installation channel 110 from disengaging from the installation channel 110, and ensuring that there is no relative movement between the connector 300 and the pressure transmission member 100 during the pressing process.

[0068] The connector 300 limits the protective component 200 in the installation channel 110, making it easy for operators to disassemble and install the protective component 200 using conventional tools. Therefore, when the protective component 200 wears out during long-term use, it can be easily replaced directly, making the operation simple and convenient.

[0069] In some embodiments, such as Figure 2 As shown, a first limiting part 1111 is constructed on the first end 113, and a second limiting part is constructed on the side of the connector 300 corresponding to the first end 113. The first limiting part 1111 is used to connect with the second limiting part to prevent the connector 300 from shifting relative to the first end 113 in the radial direction.

[0070] For example, along the radial direction of the first end 113, the first limiting portion 1111 is recessed inward from the outer edge of the first end 113, and the first limiting portion 1111 and the first end 113 form an axial height difference. The contour of the first limiting portion 1111 is adapted to the second limiting portion on the connector 300. For example, the second limiting portion on the connector 300 is a protruding annular boss corresponding to the first limiting portion 1111. The annular boss and the first limiting portion 1111 are fitted together, thereby connecting the first limiting portion 1111 and the second limiting portion. When the fastener 400 is not connected, the first limiting portion 1111 and the connector 300 form a radial preliminary positioning and preliminary constraint. This arrangement enables the fastening hole 310 of the connector 300 and the threaded hole of the first end 113 to be quickly aligned, which facilitates the insertion and tightening of the fastener 400. It should be noted that the positions of the first limiting part 1111 and the second limiting part should not affect or interfere with the connection of the fastener 400, as long as they are located in the non-penetrating area of ​​the fastener 400.

[0071] Before fastening the connector 300 and pressure transmitter 100 with fastener 400, the first limiting part 1111 can temporarily engage the connector 300, allowing it to maintain a predetermined positioning position under gravity or slight disturbance, thus improving assembly convenience. After the fastener 400 is tightened, the stepped plane of the first limiting part 1111 provides axial support for the connector 300. When the connector 300 is subjected to piston pressure, it can ensure good structural rigidity and stability, thereby helping to prevent the connector 300 from deflecting or deforming due to localized stress.

[0072] like Figure 2 As shown, in some embodiments, a lifting ring 500 is provided on the outer wall of the pressure transmission component 100. The lifting ring 500 facilitates the direct lifting of the pressure transmission component 100 by external lifting equipment, thereby facilitating the installation of the pressure transmission component 100 on the pressing fixture.

[0073] In this embodiment, the drive unit 800 can be a hydraulic press. Of course, other related equipment capable of linear drive can also be used. This embodiment does not impose an absolute limitation on this.

[0074] An exemplary usage process of the auxiliary pressing assembly in this application embodiment is as follows:

[0075] During the assembly of axle 700 and gear 600, axle 700 is hoisted onto the fixture body of the press-fitting tooling by an overhead crane. Gear 600 is then hoisted to one end of axle 700 and pre-positioned on axle 700. Connector 300 fixes protective component 200 in pressure transmission component 100 for assembly. The assembled auxiliary press-fitting assembly is hoisted onto axle 700 at the same end as gear 600. Drive component 800 is aligned with auxiliary press-fitting assembly. Hydraulic press piston extends and abuts against auxiliary press-fitting assembly, transmitting axial pressure to pressure transmission component 100. Protrusion 1121 of pressure transmission component 100 engages with hub of gear 600, transmitting axial pressure to gear 600. The stroke of hydraulic press piston is controlled to fully press gear 600 into gear seat of axle 700. After the piston stops moving, the press-fitting of gear 600 and axle 700 is completed.

[0076] like Figure 6 As shown, another embodiment of this application also provides a press-fitting fixture, including a fixture body and an auxiliary press-fitting component as described in any of the above embodiments. The fixture body is provided with a drive member 800, and the drive member 800 transmits axial pressure to the gear member 600 through the auxiliary press-fitting component on the axle 700.

[0077] Here, the press-fitting fixture includes the auxiliary press-fitting component in any of the above embodiments, and therefore has all the advantages of the auxiliary press-fitting component.

[0078] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0079] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An auxiliary press-fit assembly for assisting in mounting a gear component (600) onto an axle (700), characterized in that, include: The pressure transmission member (100) has an installation channel (110) for inserting the axle (700), and the two ends of the pressure transmission member (100) are respectively used to contact the gear (600) and an external drive member (800). The pressure transmission member (100) is used to transmit the axial pressure of the drive member (800) to the gear (600). A protective element (200) is disposed in the mounting channel (110). The protective element (200) and the pressure transmission element (100) are coaxially arranged. The protective element (200) is used to contact the axle (700) and isolate the pressure transmission element (100) and the axle (700). A connector (300) is connected to both the pressure transmission member (100) and the protective member (200), and the connector (300) is used to limit the axial sliding of the protective member (200) relative to the pressure transmission member (100).

2. The auxiliary pressing assembly according to claim 1, characterized in that, The mounting channel (110) has a first port (111) and a second port (112) opposite each other in the axial direction. The opening size of the first port (111) is larger than the outer diameter of the protective member (200), and the opening size of the second port (112) is smaller than the outer diameter of the protective member (200). The protective member (200) is inserted into the mounting channel (110) through the first port (111).

3. The auxiliary pressing assembly according to claim 2, characterized in that, The pressure transmission element (100) has a first end (113) and a second end (114) opposite each other in the axial direction. The first end (113) is provided with the first port (111), and the second end (114) is provided with the second port (112). The connector (300) is detachably connected to the first end (113) to prevent the protective element (200) in the mounting channel (110) from disengaging from the mounting channel (110).

4. The auxiliary pressing assembly according to claim 3, characterized in that, The second end (114) is provided with a protrusion (1121) which protrudes in a direction away from the first end (113) and is used to engage with the hub of the gear (600).

5. The auxiliary pressing assembly according to claim 4, characterized in that, The protrusion (1121) has a through hole that is coaxial with the mounting channel (110), and the outer wall of the protrusion (1121) gradually tapers away from the first end (113).

6. The auxiliary pressing assembly according to claim 3, characterized in that, The connector (300) is a ring-shaped component, and the connector (300) is connected to the first end (113) by a fastener (400).

7. The auxiliary pressing assembly according to claim 6, characterized in that, A first limiting part (1111) is constructed on the first end (113), and a second limiting part is constructed on the side of the connector (300) corresponding to the first end (113). The first limiting part (1111) is used to connect with the second limiting part to prevent the connector (300) from shifting relative to the first end (113) in the radial direction.

8. The auxiliary pressing assembly according to claim 6, characterized in that, The connector (300) has a plurality of fastening holes (310) arranged at uniform intervals along the circumferential direction of the connector (300). There are a plurality of fasteners (400), and each fastener (400) is connected to a fastening hole (310) in a one-to-one correspondence.

9. The auxiliary pressing assembly according to any one of claims 1 to 8, characterized in that, The outer wall of the pressure transmission component (100) is provided with a lifting ring (500); the pressure transmission component (100) and the connecting component (300) are both metal parts, and the protective component (200) is a non-metallic part.

10. A pressing tool, characterized in that, The tooling body includes an auxiliary pressing assembly as described in any one of claims 1 to 9. The tooling body is provided with a drive member (800), and the drive member (800) transmits axial pressure to the gear member (600) through the auxiliary pressing assembly on the axle (700).

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