Crankshaft oil seal pressing tool

Abstract

The application provides a crankshaft oil seal press-fitting tool, and relates to the technical field of engine crankshaft oil seal installation. The press-fitting tool comprises a pressing base, a first limiting piece inserted in the pressing base, and a second limiting piece sleeved on the pressing base. The first limiting piece and the second limiting piece are both partially arranged outside one end of the pressing base to form a limiting cavity. The limiting cavity is used for accommodating the crankshaft oil seal. The outside wall of the partial first limiting piece, the inside wall of the partial second limiting piece, and one end of the pressing base are all used for abutting against the crankshaft oil seal. The outside wall of the first limiting piece and the inside wall of the second limiting piece are used for providing radial constraint for the crankshaft oil seal to perform pre-positioning, and providing support and guidance during the press-fitting process. The crankshaft oil seal is effectively prevented from being deflected. The pressing base pushes the crankshaft oil seal to move along the axial direction of the pressing base relative to the first limiting piece, so that the crankshaft oil seal is smoothly arranged into the installation hole.

Description

Technical Field

[0001] This application relates to the field of engine crankshaft oil seal installation technology, and in particular to a crankshaft oil seal press-fit tooling. Background Technology

[0002] A crankshaft oil seal is a ring-shaped seal located at the front or rear of an engine crankshaft. Made of rubber or silicone, it provides a dynamic seal (continuous contact with the rotating crankshaft) to prevent oil leakage from the engine. During assembly, a crankshaft oil seal press-fit mechanism presses the oil seal into the mounting hole on the engine crankshaft.

[0003] In existing technology, the crankshaft oil seal press-fitting mechanism includes a guide post and a pressure sleeve. The pressure sleeve is fitted onto the guide post, and the guide post is fixed to the end face of the crankshaft (such as the rear end face of the engine crankshaft) by bolts. During assembly, the crankshaft oil seal is first placed above the crankshaft mounting hole, with the crankshaft oil seal located below the end face of the pressure sleeve. The pressure sleeve pushes the crankshaft oil seal to a certain depth within the mounting hole and then stops, thereby achieving a dynamic seal on the engine crankshaft.

[0004] However, the aforementioned press-fitting mechanism only has one end face in contact with the crankshaft oil seal, and the crankshaft oil seal is unrestrained on its periphery. During the press-fitting process, the crankshaft oil seal is prone to skew, causing severe scraping or even folding of the outer ring of the crankshaft oil seal with the inlet edge or wall of the mounting hole, which can damage the crankshaft oil seal during the press-fitting process. Utility Model Content

[0005] This application provides a crankshaft oil seal press-fitting fixture to solve the problem that existing press-fitting mechanisms only have one end face in contact with the crankshaft oil seal, the crankshaft oil seal has no circumferential constraints, and the crankshaft oil seal is prone to skew during the press-fitting process, causing severe scraping or even folding of the local outer ring of the crankshaft oil seal with the inlet edge or hole wall of the mounting hole, resulting in damage during the press-fitting process.

[0006] To achieve the above objectives, the technical solution of this application is as follows:

[0007] This application provides a crankshaft oil seal press-fit fixture, comprising: a press base; a first limiting member inserted into the press base; and a second limiting member sleeved on the press base. Both the first and second limiting members are partially disposed on the outer side of one end of the press base to form a limiting cavity, which is used to accommodate the crankshaft oil seal. A portion of the outer wall of the first limiting member, a portion of the inner wall of the second limiting member, and one end of the press base are all used to abut against the crankshaft oil seal. The press base is configured such that, after the first limiting member is connected to the crankshaft end face, under the action of an external force, it pushes the crankshaft oil seal to move relative to the first limiting member along the axial direction of the press base, so that the crankshaft oil seal enters the crankshaft mounting hole.

[0008] In one possible implementation, the crankshaft oil seal press-fitting fixture in this application embodiment further includes a fixing member, which is disposed on at least one of the first limiting member and the second limiting member. The fixing member is used to connect with the crankshaft oil seal to limit the crankshaft oil seal in the limiting cavity; the press seat is used to push the crankshaft oil seal to disengage from the fixing member.

[0009] In one possible implementation, the crankshaft oil seal press-fitting fixture in this application embodiment uses an O-ring as the fixing element, which is used to snap into the crankshaft oil seal.

[0010] In one possible implementation, the crankshaft oil seal press-fitting fixture in this embodiment includes a second limiting member comprising an elastic member and a fixed sleeve. The fixed sleeve is fitted onto one end of the press base and connected to the press base. A portion of the fixed sleeve is located on the outer side of one end of the press base, and the inner sidewall of a portion of the fixed sleeve is used to abut against the crankshaft oil seal. One end of the elastic member is connected to the first limiting member, and the other end of the elastic member is connected to the press base. The elastic member is configured such that when the press base drives the fixed sleeve to abut against the crankshaft end face, the press base pushes the crankshaft oil seal to move relative to the fixed sleeve, and the elastic member is compressed.

[0011] In one possible implementation, the crankshaft oil seal press-fitting fixture in this application embodiment further includes a first connecting member disposed at the other end of the press base. One end of the first connecting member is inserted into the elastic member through the press base. The extending direction of the first connecting member is parallel to the moving direction of the press base. The elastic member is used to compress or extend along the extending direction of the first connecting member.

[0012] In one possible implementation, the crankshaft oil seal press-fitting fixture in this application embodiment further includes a second connecting member. The fixed sleeve is provided with a through hole, and the second connecting member is inserted into the press base through the through hole. The extension direction of the second connecting member is perpendicular to the axial direction of the press base. When the elastic element is compressed, the press base drives the second connecting member to move relative to the fixed sleeve.

[0013] In one possible implementation, the crankshaft oil seal press-fit fixture in this application embodiment includes a press-fit body, a rotating component, and a rotating element. The press-fit body and the rotating component are spaced apart on the rotating component along the rotation axis of the rotating component, and the rotating component and the press-fit body abut against each other. One end of the press-fit body is used to abut against the crankshaft oil seal. The rotating component is configured to rotate under the action of an external force, driving the rotating component to rotate, and at the same time driving the press-fit body to move linearly along the rotation axis of the rotating component.

[0014] In one possible implementation, the crankshaft oil seal press-fit fixture in this application embodiment includes a rotating component comprising a tightening nut and a tightening stud. The tightening nut, the rotating component, and the pressure seat body are sequentially sleeved on the tightening stud along the axis of the tightening stud. The tightening nut is used to rotate under the action of external force to drive the tightening stud to rotate.

[0015] In one possible implementation, the crankshaft oil seal press-fitting fixture in this application embodiment has a first insertion interface on the press base body and a second insertion interface on the second limiting member. The tightening stud passes through the first insertion interface and the second insertion interface in sequence. The tightening stud is configured to rotate under the action of external force to drive the press base body to move toward the first limiting member.

[0016] In one possible implementation, the crankshaft oil seal press-fit fixture in this embodiment uses a stress-relieving bearing as the rotating component.

[0017] This application provides a crankshaft oil seal press-fitting fixture, comprising: a press base; a first limiting member inserted into the press base; and a second limiting member sleeved on the press base. Both the first and second limiting members are partially disposed on the outer side of one end of the press base to form a limiting cavity, which is used to accommodate the crankshaft oil seal. A portion of the outer wall of the first limiting member, a portion of the inner wall of the second limiting member, and one end of the press base are all used to abut against the crankshaft oil seal. This application uses the inner wall of the limiting cavity to abut against the crankshaft oil seal, i.e., the outer wall of the first limiting member and the inner wall of the second limiting member restrict the radial movement of the crankshaft oil seal, providing radial constraint for the crankshaft oil seal. This pre-positions the crankshaft oil seal before press-fitting begins and provides radial support and guidance during the press-fitting process, effectively preventing the crankshaft oil seal from skewing, twisting, or wobbling during the moment of force application and movement. The pressure seat is used to apply axial thrust to the crankshaft oil seal. Since the crankshaft oil seal is constrained by the limiting cavity, the axial force applied by the pressure seat can be transmitted to the oil seal evenly and stably. Under the action of external force, the pressure seat pushes the crankshaft oil seal to move relative to the first limiting member along the axial direction of the pressure seat, so that the crankshaft oil seal enters the mounting hole smoothly and without deviation. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] Figure 1 This is a schematic diagram of the crankshaft oil seal press-fit fixture provided in the embodiments of this application;

[0020] Figure 2 This is a three-dimensional structural diagram of the crankshaft oil seal press-fit fixture provided in the embodiments of this application.

[0021] Explanation of reference numerals in the attached figures:

[0022] 100-Pressure seat; 101-Connecting plate; 102-First connecting hole; 103-Limiting cavity; 110-Pressure seat body; 111-First insertion interface; 120-Rotating component; 130-Rotating component; 131-Tightening nut; 132-Tightening stud; 200-Second limiting component; 210-Elastic component; 220-Fixing sleeve; 221-Through hole; 300-First limiting component; 301-Second insertion interface; 400-Fixing component; 500-First connecting component; 600-Second connecting component.

[0023] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0025] It should be noted that in the description of the embodiments of this application, the terms "upper", "lower", "inner", "outer" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and are not intended to indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this application.

[0026] Furthermore, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0027] In this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," 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; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of 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. In the prior art, the crankshaft oil seal press-fitting mechanism includes a guide post and a pressure sleeve. The pressure sleeve is fitted onto the guide post, and the guide post is fixed to the end face of the crankshaft (such as the rear end face of an engine crankshaft) by bolts. During assembly, the crankshaft oil seal is first placed above the mounting hole of the crankshaft, with the crankshaft oil seal located below the end face of the pressure sleeve. The pressure sleeve pushes the crankshaft oil seal to a certain depth within the mounting hole and then stops, thereby achieving a dynamic seal on the engine crankshaft.

[0028] However, the aforementioned press-fitting mechanism only contacts the crankshaft oil seal on one end face, leaving the oil seal unconstrained on its periphery. This makes the oil seal prone to misalignment during press-fitting, potentially damaging it. Since the crankshaft oil seal is made of elastic material, when it is misaligned under pressure, the concentricity of the inner and outer rings deteriorates. This can cause severe scraping or even folding of the outer ring against the inlet edge or wall of the mounting hole, ultimately damaging the oil seal.

[0029] In view of this, this application provides a crankshaft oil seal press-fitting fixture, which includes: a press base; a first limiting member inserted into the press base; and a second limiting member sleeved on the press base. Both the first and second limiting members are partially disposed on the outer side of one end of the press base to form a limiting cavity. The limiting cavity is used to accommodate the crankshaft oil seal, and a portion of the outer wall of the first limiting member, a portion of the inner wall of the second limiting member, and one end of the press base are all used to abut against the crankshaft oil seal. This application uses the inner wall of the limiting cavity to abut against the crankshaft oil seal, i.e., the outer wall of the first limiting member and the inner wall of the second limiting member restrict the radial movement of the crankshaft oil seal, providing radial constraint for the crankshaft oil seal. This allows for pre-positioning of the crankshaft oil seal before press-fitting begins and provides radial support and guidance during the press-fitting process, effectively preventing the crankshaft oil seal from skewing, twisting, or wobbling during the moment of force application and movement. The pressure seat is used to apply axial thrust to the crankshaft oil seal. Since the crankshaft oil seal is constrained by the limiting cavity, the axial force applied by the pressure seat can be transmitted to the oil seal evenly and stably. Under the action of external force, the pressure seat pushes the crankshaft oil seal to move relative to the first limiting member along the axial direction of the pressure seat, so that the crankshaft oil seal enters the mounting hole smoothly and without deviation.

[0030] The following is combined Figure 1 and Figure 2 This application will be described in detail with reference to specific embodiments. Figure 2 The x-direction indicates the direction in which the pressure seat pushes the crankshaft oil seal to move.

[0031] This application provides a crankshaft oil seal press-fit fixture, comprising: a press base 100; a first limiting member 300 inserted into the press base 100; and a second limiting member 200 sleeved on the press base 100. Both the first limiting member 300 and the second limiting member 200 are partially disposed on the outer side of one end of the press base 100 to form a limiting cavity 103. The limiting cavity 103 is used to accommodate the crankshaft oil seal, and a portion of the outer wall of the first limiting member 300, a portion of the inner wall of the second limiting member 200, and one end of the press base 100 are all used to abut against the crankshaft oil seal. The press base 100 is configured such that, after the first limiting member 300 is connected to the crankshaft end face, under the action of an external force, it pushes the crankshaft oil seal to move relative to the first limiting member 300 along the axial direction of the press base 100, so that the crankshaft oil seal enters the crankshaft mounting hole.

[0032] Before press-fitting, the limiting cavity 103 is used to pre-fix the crankshaft oil seal on the crankshaft oil seal press-fitting fixture, limit the crankshaft oil seal, form the initial positioning of the crankshaft oil seal, reduce the shaking of the crankshaft oil seal, and avoid the need for two positioning before press-fitting in the prior art, namely, the crankshaft oil seal is aligned with the mounting hole and the crankshaft oil seal press-fitting fixture is aligned with the crankshaft oil seal.

[0033] The two opposing sidewalls of the limiting cavity 103 abut against the two opposing sidewalls of the crankshaft oil seal, thereby restricting the tilting of the crankshaft oil seal sidewalls and limiting the coaxiality of the inner and outer rings of the crankshaft oil seal. One end of the pressure seat 100 abuts against the crankshaft oil seal, restricting its axial movement. Furthermore, when press-fitting is required, external force causes the pressure seat 100 to move towards the crankshaft oil seal. Since the end face of the pressure seat 100 abuts against the crankshaft oil seal, it pushes the crankshaft oil seal towards the mounting hole. The two opposing sidewalls of the limiting cavity 103 serve as guides and limiters.

[0034] The crankshaft oil seal is annular. The two opposite sidewalls of the crankshaft oil seal refer to the outer sidewall of the outer ring and the inner sidewall of the inner ring. The concentricity of the inner and outer rings of the crankshaft oil seal is improved by the limiting cavity 103, which avoids the sidewalls of the crankshaft oil seal being unrestrained and causing damage to the crankshaft oil seal during the press-fitting process.

[0035] This application restricts the radial movement of the crankshaft oil seal by using the outer wall of the first limiting member and the inner wall of the second limiting member. Specifically, a portion of the outer wall of the first limiting member 300 abuts against the inner wall of the inner ring of the crankshaft oil seal, and a portion of the inner wall of the second limiting member 200 abuts against the outer wall of the outer ring of the crankshaft oil seal, thus providing radial constraint for the crankshaft oil seal. This pre-positions the crankshaft oil seal before press-fitting begins and provides support and guidance during the press-fitting process, effectively preventing the crankshaft oil seal from skewing, twisting, or swaying during the moment of force application and during movement. One end of the pressure seat 100 is used to apply axial thrust to the crankshaft oil seal, with the thrust direction as follows: Figure 2 As shown in the x-direction, since the crankshaft oil seal is constrained by the first limiting member 300 and the second limiting member 200, the axial force applied by the pressure seat 100 can be transmitted to the oil seal evenly and stably, pushing the crankshaft oil seal to move relative to the first limiting member 300 along the axial direction of the pressure seat 100, and smoothly slide into the mounting hole.

[0036] In some embodiments, this application further includes a fixing member 400, which is disposed on at least one of the first limiting member 300 and the second limiting member 200. The fixing member 400 is used to connect with the crankshaft oil seal to limit the crankshaft oil seal within the limiting cavity 103. When assembling the crankshaft oil seal, the pressure seat 100 pushes the crankshaft oil seal to disengage from the fixing member 400.

[0037] For example, the first limiting member 300 is a guide post, and the second limiting member 200 includes a fixing sleeve 220. The crankshaft oil seal is located between the outer wall of the guide post and the inner wall of the fixing sleeve 220, and one end of the pressure seat 100 abuts against the crankshaft oil seal. A fixing member 400 is provided between the crankshaft oil seal and the outer wall of the guide post to limit the crankshaft oil seal and prevent it from moving freely within the limiting cavity 103, thus preparing for the assembly of the crankshaft oil seal. Alternatively, a fixing member 400 can be provided between the crankshaft oil seal and the inner wall of the fixing sleeve 220 so that the fixing member 400 is connected to the crankshaft oil seal before the fixing sleeve 220 abuts against the end face of the mounting part, thus providing a good fixing and limiting effect on the crankshaft oil seal.

[0038] Among them, the fixing component 400 is an O-ring, which is used to engage with the crankshaft oil seal. Understandably, during assembly, the crankshaft oil seal is first pre-fixed, placed in the limiting cavity 103, and engaged with the O-ring. The outer ring of the crankshaft oil seal is constrained by the inner wall of the fixing sleeve 220, the inner ring is constrained by the outer wall of the guide post, and the end face of the crankshaft oil seal facing away from the mounting hole is constrained by the end face of the pressure seat body 110. This pre-fixation of the crankshaft oil seal reduces the need for repeated alignment of the crankshaft oil seal using press-fitting fixtures in existing technologies, improving convenience.

[0039] In one possible implementation, the crankshaft oil seal press-fitting fixture in this embodiment includes a second limiting member 200 comprising an elastic member 210 and a fixing sleeve 220. The fixing sleeve 220 is sleeved on one end of the press base 100 and connected to the press base 100. Part of the fixing sleeve 220 is located on the outer side of one end of the press base 100, and part of the inner sidewall of the fixing sleeve 220 is used to abut against the crankshaft oil seal. One end of the elastic member 210 is connected to the first limiting member 300, and the other end of the elastic member 210 is connected to the press base 100. The elastic member 210 is configured such that when the press base 100 drives the fixing sleeve 220 to abut against the crankshaft end face, the press base 100 pushes the crankshaft oil seal to move relative to the fixing sleeve 220, and the elastic member 210 is compressed.

[0040] like Figure 1 As shown, when the end face of the fixed sleeve 220 abuts against the end face of the crankshaft, the pressure seat body 110 pushes the crankshaft oil seal forward axially. At this time, the fixed sleeve 220 stops moving due to the obstruction of the end face of the mounting part. However, the crankshaft oil seal has not yet entered the mounting hole, so it is necessary to continue applying force to the pressure seat 100. Since the fixed sleeve 220 cannot move forward, this continuous thrust will cause the pressure seat body 110 to produce a forward relative displacement relative to the fixed sleeve 220, thereby compressing the elastic element 210 sleeved on the first connecting member 500. The fixed sleeve 220 remains stationary, and the crankshaft oil seal disengages from the fixed sleeve 220 and enters the mounting hole. The compression state of the elastic element 210 visually indicates whether the end face of the fixed sleeve 220 abuts against the end face of the crankshaft, making it easy for operators to check the pressing state. On the other hand, it allows the fixed sleeve 220 to adapt to the crankshaft end face in different installation positions, improving the versatility of the tooling.

[0041] This application also includes a first connector 500 disposed at the other end of the pressure seat 100. One end of the first connector 500 is inserted into the elastic member 210 through the pressure seat 100. The extension direction of the first connector 500 is parallel to the movement direction of the pressure seat 100. The elastic member 210 is used to compress or extend along the extension direction of the first connector 500.

[0042] Specifically, a connecting plate 101 is provided on the outer periphery of the pressure seat 100. The connecting plate 101 has a first connecting hole 102 extending along the axial direction of the pressure seat 100. The first connecting member 500 is inserted into the elastic member 210 through the first connecting hole 102. The elastic member 210 is used to compress or extend along the extending direction of the first connecting member 500.

[0043] The first connector 500 is used to guide the elastic member 210. The first connecting hole 102 is a connecting through hole 221. One end of the first connector 500 is inserted into the elastic member 210 through the first connecting hole 102. Before the fixed sleeve 220 abuts against the crankshaft end face, the elastic member 210 is neither compressed nor extended, and the fixed sleeve 220 moves together with the pressure seat 100. When the fixed sleeve 220 abuts against the crankshaft end face, the fixed sleeve 220 is blocked and cannot move. Afterward, the pressure seat 100 continues to move, causing the elastic member 210 to compress, and the connecting plate 101 moves into the fixed sleeve 220. After the crankshaft oil seal is installed, the fixed sleeve 220 disengages from the crankshaft end face, the elastic member 210 extends, and the fixed sleeve 220 returns to its original position.

[0044] This application does not limit the structure and quantity of the elastic element 210. For example, the elastic element 210 is a spring, and there are multiple elastic elements 210. Each elastic element 210 is arranged at intervals along the circumference of the fixed sleeve 220, so that the force is more uniform and the pressing process is more stable.

[0045] This application does not limit the number of first connectors 500 and first connecting holes 102. Multiple first connecting holes 102 are arranged at intervals along the circumference of the connecting disc 101, and each first connector 500 and each first connecting hole 102 are connected in a one-to-one correspondence. For example, there are two first connectors 500 and two first connecting holes 102, and there are also two elastic members 210, with each elastic member 210 corresponding to each first connector 500.

[0046] Furthermore, this application does not limit the number of connecting disks 101; for example, there can be multiple connecting disks 101. Figure 2 As shown, multiple connecting discs 101 are spaced around the outer periphery of the pressure seat body 110.

[0047] like Figure 1 As shown, this embodiment of the application also includes a second connector 600. The fixed sleeve 220 is provided with a through hole 221. The second connector 600 is inserted into the pressure seat 100 through the through hole 221. The extension direction of the second connector 600 is perpendicular to the axial direction of the pressure seat 100. When the elastic member 210 is compressed, the pressure seat 100 drives the second connector 600 to move relative to the fixed sleeve 220.

[0048] Before the fixed sleeve 220 abuts against the crankshaft end face, the elastic element 210 neither compresses nor extends. The fixed sleeve 220 moves together with the pressure seat 100. There is no relative movement between the through hole 221 and the second connecting member 600. When the fixed sleeve 220 abuts against the crankshaft end face, the fixed sleeve 220 is blocked and cannot move. After the fixed sleeve 220 is blocked and cannot move, the pressure seat 100 continues to move, causing the elastic element 210 to compress. At this time, the second connecting member 600 moves with the pressure seat 100 relative to the through hole 221 on the fixed sleeve 220.

[0049] This application does not limit the structure of the second connector 600; for example, the second connector 600 can be a snap pin or a bolt. The second connector 600 is used to connect the pressure seat 100 and the fixed sleeve 220, increasing the reliability of the connection between the two. The diameter of the through hole 221 is larger than the insertion diameter of the second connector 600, thereby providing space for the second connector 600 to move relative to the fixed sleeve 220 through the through hole 221.

[0050] Furthermore, the diameter of the through hole 221 is adapted to the insertion diameter of the second connector 600. The through hole 221 does not provide space for the second connector 600 to move relative to the fixed sleeve 220. Before the fixed sleeve 220 abuts against the crankshaft end face, the second connector 600 is always connected to the pressure seat 100 through the through hole 221 to avoid relative displacement between the pressure seat 100 and the fixed sleeve 220. When the fixed sleeve 220 abuts against the crankshaft end face, the second connector 600 is disengaged from the pressure seat 100 so that the elastic element 210 can be compressed. At this time, the pressure seat 100 moves relative to the fixed sleeve 220.

[0051] In some embodiments, the pressure seat 100 includes a pressure seat body 110, a rotating member 120, and a rotating member 130. The pressure seat body 110 and the rotating member 120 are spaced apart on the rotating member 130 along the rotation axis of the rotating member 130, and the rotating member 120 and the pressure seat body 110 abut against each other. One end of the pressure seat body 110 is used to abut against the crankshaft oil seal. The rotating member 130 is configured to rotate under the action of an external force, drive the rotating member 120 to rotate, and at the same time drive the pressure seat body 110 to move linearly along the rotation axis of the rotating member 130.

[0052] This application uses the rotating component 120 to rotate while keeping the pressure seat body 110 stationary, thus preventing the pressure seat body 110 from rotating and increasing friction on the crankshaft oil seal end face. The crankshaft oil seal is subjected to force in a purely axial direction, preventing the sealing lip from deforming, scratching, or wearing due to rotational friction.

[0053] The rotational motion of the rotating component 130 can be converted into the linear motion of the pressure seat body 110, such as... Figure 2 As shown in the x-direction, this design enables smooth pushing of the crankshaft oil seal, preventing damage due to uneven thrust. The pressure seat body 110 and the rotating component 120 are spaced apart along the rotation axis of the rotating component 130 and abut against each other, ensuring that the rotation of the rotating component 120 does not interfere with the linear motion of the pressure seat body 110, reducing motion interference, improving pressing efficiency and accuracy, and facilitating the adjustment of the pushing distance of the pressure seat body 110 by controlling the rotation of the rotating component 130.

[0054] The rotating component 130 includes a tightening nut 131 and a tightening stud 132. The tightening nut 131, the rotating component 120 and the pressure seat body 110 are sequentially sleeved on the tightening stud 132 along the axis of the tightening stud 132. The tightening nut 131 is used to rotate under the action of external force to drive the tightening stud 132 to rotate.

[0055] When the nut 131 is rotated and tightened, the tightening stud 132 rotates around its own axis through the threaded transmission, thereby driving the pressure seat body 110 to move linearly along the axial direction of the tightening stud 132. One end of the pressure seat body 110 abuts against the crankshaft oil seal, thereby pushing the crankshaft oil seal. The rotating component 120 is located between the tightening nut 131 and the pressure seat body 110, and plays a role in relieving force. In this embodiment, there is a gap between the end face of the pressure seat body 110 and the end face of the first limiting member 300 for the movement of the pressure seat body 110. The end of the tightening stud 132 can be connected to the first limiting member 300 or not. This application does not limit the length of the tightening stud 132. For example, the length of the tightening stud 132 is greater than the gap between the end face of the pressure seat body 110 and the end face of the first limiting member 300.

[0056] The engagement between the tightening nut 131 and the tightening stud 132 utilizes a threaded drive mechanism to control the linear movement distance and thrust of the pressure seat body 110, ensuring that the crankshaft oil seal is properly installed and under appropriate pressure. Furthermore, the threaded drive structure is simple and easy to operate; rotating the tightening nut 131 drives the tightening stud 132, which in turn rotates the rotating component 120 and moves the pressure seat body 110.

[0057] The pressure seat body 110 has a first insertion interface 111, and the second limiting member 200 has a second insertion interface 301. The tightening stud 132 passes through the first insertion interface 111 and the second insertion interface 301 in sequence. The tightening stud 132 is configured to rotate under the action of external force to push the pressure seat body 110 toward the second limiting member 200.

[0058] The first insertion interface 111 is located in the middle of the pressure base body 110, and the second insertion interface 301 is located in the middle of the second limiting member 200. The first insertion interface 111 is a threaded through hole 221, and the second insertion interface 301 is a threaded groove or a threaded through hole 221. This application does not limit this.

[0059] The second insertion interface 301 is used to accommodate one end of the tightening stud 132 and plays a certain guiding role. The first insertion interface 111 and the second insertion interface 301 provide limiting support to prevent the tightening stud 132 from bending or shifting during rotation.

[0060] The setting of the tightening stud 132 passing through the first insertion interface 111 and the second insertion interface 301 plays a good guiding role in the movement of the tightening stud 132, ensuring the linearity of its rotation and pushing process, avoiding skewness, and ensuring that the pressure seat body 110 can move accurately toward the first limiting member 300, so that the pressing position of the crankshaft oil seal is more accurate.

[0061] The rotating component 120 is a stress-relieving bearing. The stress-relieving bearing has an inner ring and an outer ring. The inner ring rotates while the outer ring does not rotate. The inner ring is fitted onto the tightening stud 132 and rotates with the tightening stud 132 and moves linearly along the axial direction of the tightening stud 132. The outer ring is connected to the end face of the pressure seat body 110 and only moves linearly along the axial direction of the tightening stud 132, thereby achieving the stress-relieving effect.

[0062] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models 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.

Claims

1. A crankshaft oil seal press-fit fixture, characterized in that, include: Pressing seat; The first limiting member is inserted into the pressure seat; The second limiting member is sleeved on the pressure seat. Both the first limiting member and the second limiting member are partially disposed on the outer side of one end of the pressure seat to form a limiting cavity. The limiting cavity is used to accommodate the crankshaft oil seal. Part of the outer side wall of the first limiting member, part of the inner side wall of the second limiting member, and one end of the pressure seat are all used to abut against the crankshaft oil seal. The pressure seat is configured such that, after the first limiting member is connected to the crankshaft end face, under the action of an external force, it pushes the crankshaft oil seal to move relative to the first limiting member along the axial direction of the pressure seat, so that the crankshaft oil seal enters the crankshaft mounting hole.

2. The crankshaft oil seal press-fit fixture according to claim 1, characterized in that, It also includes a fixing member disposed on at least one of the first limiting member and the second limiting member, the fixing member being used to connect with the crankshaft oil seal to limit the crankshaft oil seal within the limiting cavity; the pressure seat being used to push the crankshaft oil seal to disengage from the fixing member.

3. The crankshaft oil seal press-fit fixture according to claim 2, characterized in that, The fastener is an O-ring, which is used to engage with the crankshaft oil seal.

4. The crankshaft oil seal press-fit fixture according to any one of claims 1-3, characterized in that, The second limiting member includes an elastic member and a fixing sleeve. The fixing sleeve is sleeved on one end of the pressure seat and connected to the pressure seat. Part of the fixing sleeve is located on the outer side of one end of the pressure seat, and part of the inner sidewall of the fixing sleeve is used to abut against the crankshaft oil seal. One end of the elastic member is connected to the first limiting member, and the other end of the elastic member is connected to the pressure seat. The elastic element is configured such that when the pressure seat drives the fixed sleeve to abut against the crankshaft end face, the pressure seat pushes the crankshaft oil seal to move relative to the fixed sleeve, and the elastic element is compressed.

5. The crankshaft oil seal press-fit fixture according to claim 4, characterized in that, It also includes a first connector disposed at the other end of the pressure seat, one end of the first connector being inserted into the elastic member via the pressure seat, the extension direction of the first connector being parallel to the movement direction of the pressure seat, and the elastic member being used to compress or extend along the extension direction of the first connector.

6. The crankshaft oil seal press-fit fixture according to claim 4, characterized in that, It also includes a second connector, the fixing sleeve is provided with a through hole, the second connector is inserted into the pressure base through the through hole, and the extension direction of the second connector is perpendicular to the axial direction of the pressure base; When the elastic element is compressed, the pressure seat causes the second connecting member to move relative to the fixed sleeve.

7. The crankshaft oil seal press-fit fixture according to any one of claims 1-3, characterized in that, The pressure seat includes a pressure seat body, a rotating component, and a rotating component. The pressure seat body and the rotating component are spaced apart on the rotating component along the rotation axis of the rotating component, and the rotating component and the pressure seat body abut against each other. One end of the pressure seat body is used to abut against the crankshaft oil seal. The rotating component is configured to rotate under the action of an external force, thereby driving the rotating component to rotate and simultaneously driving the pressure base body to move linearly along the rotation axis of the rotating component.

8. The crankshaft oil seal press-fit fixture according to claim 7, characterized in that, The rotating component includes a tightening nut and a tightening stud. The tightening nut, the rotating component, and the pressure base body are sequentially sleeved on the tightening stud along the axis of the tightening stud. The tightening nut is used to rotate under the action of external force to drive the tightening stud to rotate.

9. The crankshaft oil seal press-fit fixture according to claim 8, characterized in that, The pressure base body has a first insertion interface, and the second limiting member has a second insertion interface. The tightening stud passes through the first insertion interface and the second insertion interface in sequence. The tightening stud is configured to rotate under the action of external force to drive the pressure base body to move toward the first limiting member.

10. The crankshaft oil seal press-fit fixture according to claim 7, characterized in that, The rotating component is a load-bearing bearing.

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