Oil seal mounting tool

Abstract

The application relates to an oil seal mounting tool, which comprises a positioning sleeve, a pressing rod and a positioning seat. The positioning sleeve comprises an end wall and a side wall. The end wall is provided with a through hole. One end of the side wall is connected with the end wall, so that the side wall and the end wall enclose an inner cavity. The other end of the side wall away from the end wall forms an opening. The positioning sleeve is used for sleeving a bearing seat. The pressing rod is threadedly connected with the through hole. One end of the pressing rod extends into the positioning sleeve, and the other end of the pressing rod extends out of the positioning sleeve. The positioning seat is rotationally connected with the one end of the pressing rod extending into the positioning sleeve through a bearing. The positioning seat is used for sleeving the oil seal on the outer circumferential surface thereof. The oil seal mounting tool can accurately position the oil seal, has good sealing effect, reduces the replacement of the oil seal, and reduces the maintenance cost and the working strength of the maintenance personnel.

Description

Technical Field

[0001] This application relates to the field of cigarette machine equipment maintenance tools, and in particular to oil seal installation fixtures. Background Technology

[0002] When the cigarette cutting device of a cigarette machine is working, it cuts the cigarette strips with a cutter head and uses a bell mouth to support the cigarette strips to prevent them from sagging and deforming due to force during cutting. Because the cutter head has a certain horizontal velocity component during cutting, the bell mouth is required to move accordingly in the direction of the cigarette strip.

[0003] The bell mechanism includes a crank-connecting rod assembly, a bell support, a bell, and a vibrating disc. The crank-connecting rod assembly drives the bell support and the bell on it to reciprocate at high speed. The connecting rod bearing housing in the crank-connecting rod assembly is eccentrically positioned on the crank, causing it to operate at high speed and eccentrically for extended periods. This results in rapid wear of the oil seals used for lubrication within the connecting rod bearing housing, requiring periodic replacement.

[0004] During the replacement of the oil seal in the connecting rod bearing housing, maintenance personnel commonly use a hammer to force the oil seal into the housing. This can easily lead to problems such as oil seal deformation, misalignment, and spring detachment, resulting in improper installation, poor sealing performance, and the need for repeated replacement, which increases maintenance costs and workload. Utility Model Content

[0005] Therefore, it is necessary to provide an oil seal installation tool to address the aforementioned technical problems.

[0006] An oil seal installation fixture is used to install an oil seal into a connecting rod bearing housing. The connecting rod bearing housing includes a bearing housing and a connecting rod connected to the outer wall of the bearing housing. The oil seal installation fixture includes:

[0007] A positioning sleeve includes an end wall and a side wall. The end wall has a through hole, and one end of the side wall is connected to the end wall so that the side wall and the end wall enclose an inner cavity. The end of the side wall away from the end wall forms an opening. The positioning sleeve is used to be fitted onto a bearing seat.

[0008] A clamping rod is threaded into a through hole, with one end extending into the positioning sleeve and the other end extending out of the positioning sleeve; and

[0009] The positioning seat is rotatably connected to one end of the clamping rod that extends into the positioning sleeve via a bearing. The positioning seat is used to supply oil seals to be mounted on its outer circumferential surface.

[0010] In one embodiment, a boss is provided at one end of the clamping rod that extends into the positioning sleeve. The outer diameter of the boss is larger than the outer diameter of the clamping rod, and the positioning seat is rotatably connected to the boss through a bearing.

[0011] In one embodiment, the oil seal installation fixture further includes a support frame, which is movably connected to the positioning sleeve so that the support frame can switch between a first position and a second position;

[0012] In the first position, the support frame is located at the open end of the positioning sleeve to support the sleeved bearing housing;

[0013] In the second position, the support frame moves away from the open end of the positioning sleeve to release the support on the bearing housing.

[0014] In one embodiment, the support frame is rotatably connected to the positioning sleeve via a pin about an axis in a first direction, which is perpendicular to the axial direction of the positioning sleeve.

[0015] In one embodiment, the support frame includes a bottom support portion and two side support portions. The two side support portions are respectively connected to both ends of the bottom support portion and are located on both sides of the positioning sleeve. The ends of the two side support portions away from the bottom support portion are respectively rotatably connected to the side wall of the positioning sleeve via pins.

[0016] In one embodiment, the sidewall includes a first segment and a second segment connected to the first segment. The first segment is located on the side of the second segment near the end wall. The inner diameter of the first segment is larger than the inner diameter of the second segment, so that the connection between the inner circumferential surface of the first segment and the inner circumferential surface of the second segment forms a stepped surface, and the orientation of the stepped surface is the same as the orientation of the opening. The stepped surface is used to limit the bearing seat.

[0017] In one embodiment, the wall thickness of the first segment is less than the wall thickness of the second segment.

[0018] In one embodiment, a clearance groove is provided on the side wall, the extension direction of the clearance groove is along the axial direction of the positioning sleeve, and the clearance groove is used to avoid the connecting rod.

[0019] In one embodiment, the clearance groove extends through the sidewall along the axial direction of the positioning sleeve, so that the interior of the positioning sleeve can be observed through the clearance groove.

[0020] In one embodiment, a handle is installed at the end of the clamping rod located outside the positioning sleeve.

[0021] When the aforementioned oil seal installation fixture is used to install the oil seal into the connecting rod bearing housing, the positioning sleeve is fitted onto the outside of the bearing housing through an opening, and the oil seal is fitted onto the outer circumferential surface of the positioning seat. Because the positioning seat is rotatably connected to one end of the clamping rod extending into the positioning sleeve via a bearing, and the clamping rod is threadedly connected to the through hole in the end wall of the positioning sleeve, rotating the end of the clamping rod extending out of the positioning sleeve causes the clamping rod to move axially along the through hole, thereby driving the positioning seat and the oil seal to move axially, allowing the oil seal to enter the bearing housing. There is a certain friction between the oil seal and the inner wall of the bearing housing. Since the positioning seat with the oil seal is mounted on it is rotatably connected to the clamping rod through the bearing, when the clamping rod is rotated to drive the positioning seat to move axially, the positioning seat does not rotate with the clamping rod. This allows the positioning seat and the oil seal mounted on it to move smoothly axially within the bearing housing until the oil seal is installed in place. This avoids problems such as oil seal deformation, skewing, and spring detachment during the oil seal installation process, ensuring accurate oil seal installation, good sealing effect, and ultimately reducing the need for repeated oil seal replacements, thus lowering maintenance costs and reducing the workload of maintenance personnel. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the connecting rod bearing housing in related technologies.

[0023] Figure 2 This is a schematic diagram illustrating the fit between the oil seal installation fixture and the oil seal in one embodiment.

[0024] Figure 3 for Figure 2 A schematic diagram of the positioning sleeve and support frame.

[0025] Figure 4 for Figure 2 A schematic diagram showing the connection relationship between the clamping rod, boss, bearing, and positioning seat.

[0026] Figure 5 for Figure 2 A schematic diagram of the positioning sleeve of the oil seal installation tool being fitted onto the bearing housing.

[0027] Figure 6 for Figure 5 The diagram shows the oil seal installation tool pressing the oil seal into the bearing housing.

[0028] Explanation of icon numbers:

[0029] 10. Oil seal; 20. Connecting rod bearing housing; 21. Bearing housing; 22. Connecting rod:

[0030] 100. Positioning sleeve; 110. End wall; 111. Through hole; 120. Side wall; 121. First section; 122. Second section; 123. Stepped surface; 101. Opening; 102. Inner cavity; 103. Clearance groove;

[0031] 200. Pressure bar;

[0032] 300. Positioning seat;

[0033] 400. Bearings;

[0034] 500, boss;

[0035] 600. Support frame; 510. Bottom support; 520. Side support;

[0036] 700, pin;

[0037] 800, Handle. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0039] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0040] Furthermore, where the terms "first" and "second" appear, these terms are 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 with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0044] See Figure 1 The connecting rod bearing housing 20 in the related technology includes a bearing housing 21 and a connecting rod 22. One end of the connecting rod 22 is connected to the outer wall of the bearing housing 21, and the connecting rod 22 extends radially along the bearing housing 21.

[0045] Combination Figures 2 to 4 One embodiment of this application provides an oil seal installation fixture for installing an oil seal 10 into a connecting rod bearing housing 20. The connecting rod bearing housing 20 includes a bearing housing 21 and a connecting rod 22 connected to the outer wall of the bearing housing 21.

[0046] The oil seal installation fixture includes a positioning sleeve 100, a clamping rod 200, and a positioning seat 300.

[0047] The positioning sleeve 100 includes an end wall 110 and a side wall 120. The end wall 110 is provided with a through hole 111. One end of the side wall 120 is connected to the end wall 110 so that the side wall 120 and the end wall 110 enclose an inner cavity 102. The end of the side wall 120 away from the end wall 110 forms an opening 101. The positioning sleeve 100 is used to be fitted onto the bearing seat 21.

[0048] The clamping rod 200 is threadedly connected to the through hole 111. One end of the clamping rod 200 extends into the positioning sleeve 100, and the other end extends out of the positioning sleeve 100.

[0049] The positioning seat 300 is rotatably connected to one end of the clamping rod 200 that extends into the positioning sleeve 100 via the bearing 400. The positioning seat 300 is used to supply the oil seal 10 to be sleeved on its outer circumferential surface.

[0050] When the aforementioned oil seal installation fixture is used to install the oil seal into the connecting rod bearing housing 20, the positioning sleeve 100 is fitted onto the bearing housing 21 of the connecting rod bearing housing 20 through the opening 101, and the oil seal 10 is fitted onto the outer circumferential surface of the positioning seat 300. Because the positioning seat 300 is rotatably connected to one end of the clamping rod 200 extending into the positioning sleeve 100 via the bearing 400, and the clamping rod 200 is threadedly connected to the through hole 111 of the end wall 110 of the positioning sleeve 100, when the end of the clamping rod 200 extending out of the positioning sleeve 100 is rotated, the clamping rod 200 will simultaneously move axially along the through hole 111, thereby driving the positioning seat 300 to move the oil seal 10 axially, allowing the oil seal 10 to enter the bearing housing 21. There is a certain friction between the oil seal 10 and the inner wall of the bearing housing 21. Since the positioning seat 300 on which the oil seal 10 is sleeved is rotatably connected to the clamping rod 200 through the bearing 400, when the clamping rod 200 is rotated to drive the positioning seat 300 to move axially, the positioning seat 300 can not rotate with the clamping rod 200. This allows the positioning seat 300 and the oil seal 10 sleeved on it to move smoothly axially within the bearing housing 21 until the oil seal 10 is installed in place. This avoids problems such as oil seal deformation, skewing, and spring falling off during the installation of the oil seal 10, ensuring accurate installation of the oil seal 10, good sealing effect, and ultimately reducing the need for repeated replacement of the oil seal 10, thus reducing maintenance costs and the workload of maintenance personnel.

[0051] like Figure 2 As shown, the outer diameter of the bearing 400 is larger than the outer diameter of the positioning seat 300. When the clamping rod 200 is rotated to drive the positioning seat 300 and the oil seal 10 to move axially, the bearing 400 can limit the oil seal 10 and prevent the oil seal 10 from moving upward.

[0052] When the oil seal 10 is installed in the bearing housing 21, the clamping rod 200 can be rotated in the opposite direction. Through the screw drive of the clamping rod 200 and the through hole 111, the clamping rod 200 moves out of the positioning sleeve 100, thereby driving the positioning seat 300 to move out of the bearing housing 21, while the oil seal 10 remains in the bearing housing 21.

[0053] Please refer to Figure 2 and Figure 4 In one embodiment, a boss 500 is provided at one end of the clamping rod 200 that extends into the positioning sleeve 100. The outer diameter of the boss 500 is larger than the outer diameter of the clamping rod 200. The positioning seat 300 is rotatably connected to the boss 500 through a bearing 400.

[0054] The inner ring of bearing 400 is connected to boss 500, and the outer ring of bearing 400 is connected to positioning seat 300, thereby enabling positioning seat 300 and boss 500 to be rotatably connected through bearing 400.

[0055] The clamping rod 200 has a small outer diameter and a lightweight structure. The bearing 400, however, has a larger diameter than the clamping rod 200. To facilitate the connection between the bearing 400 and the clamping rod 200, a boss 500 is provided. The outer diameter of the boss 500 is larger than that of the clamping rod 200, allowing the clamping rod 200 to be indirectly connected to the bearing 400 via the boss 500, thus simplifying the connection between the two.

[0056] Please combine Figure 3 , Figure 5 as well as Figure 6 In one embodiment, the oil seal mounting fixture further includes a support frame 600, which is movably connected to the positioning sleeve 100 so that the support frame 600 can switch between a first position and a second position. In the first position, the support frame 600 is located at the end of the positioning sleeve 100 with the opening 101 to support the mounted bearing housing 21. In the second position, the support frame 600 moves away from the end of the positioning sleeve 100 with the opening 101 to release the support for the bearing housing 21.

[0057] During the oil seal installation stage, the support frame 600 can be positioned in the first position. The support frame 600 can support the bearing seat 21 fitted by the positioning sleeve 100, preventing the bearing seat 21 from shifting during the installation of the oil seal 10 by the clamping rod 200. This ensures that the oil seal 10 can be accurately pressed into the bearing seat 21, avoiding the oil seal 10 from tilting or deforming due to the shaking of the bearing seat 21.

[0058] After the oil seal is installed, the support frame 600 can be switched to the second position, thereby moving the support frame 600 away from the end of the positioning sleeve 100 with the opening 101, so as to release the support on the bearing seat 21, and thus facilitate the smooth removal of the positioning sleeve 100 from the bearing seat 21.

[0059] Please combine Figure 2 , Figure 3 , Figure 5 as well as Figure 6 In one embodiment, the support frame 600 is rotatably connected to the positioning sleeve 100 about an axis in a first direction via a pin 700, the first direction being perpendicular to the axial direction of the positioning sleeve 100.

[0060] Since the first direction is perpendicular to the axial direction of the positioning sleeve 100, when the support frame 600 rotates around the positioning sleeve 100 via the pin 700, it can ensure that the support frame 600 always moves around the radial plane of the positioning sleeve 100. Thus, the support frame 600 can rotate to align with the end of the positioning sleeve 100 with the opening 101 (first position) or move away from the end of the opening 101 (second position), which facilitates switching between the first position and the second position. Moreover, the support frame 600 can be switched between the first position and the second position without disassembling it. This makes it convenient to quickly put the positioning sleeve 100 on the bearing seat 21 or quickly separate the bearing seat 21 from the positioning sleeve 100.

[0061] Please combine Figure 2 , Figure 3 , Figure 5 as well as Figure 6 In one embodiment, the support frame 600 includes a bottom support portion 510 and two side support portions 520. The two side support portions 520 are respectively connected to both ends of the bottom support portion 510. The two side support portions 520 are respectively located on both sides of the positioning sleeve 100. The ends of the two side support portions 520 away from the bottom support portion 510 are respectively rotatably connected to the side wall 120 of the positioning sleeve 100 through pins 700.

[0062] On the one hand, the two side support parts 520 are rotatably connected to the side wall 120 on both sides of the positioning sleeve 100 via pins 700, which can ensure that the support frame 600 is subjected to balanced force when rotating around the first direction axis (perpendicular to the axial direction of the positioning sleeve), and avoid deviation or jamming when switching between the first and second positions. On the other hand, the bottom support part 510 can support the bearing seat 21, and the side support parts 520 on both sides can assist in limiting the bearing seat 21 from both sides of the positioning sleeve 100, preventing the bearing seat 21 from shaking or shifting during the installation of the oil seal 10, ensuring that the oil seal 10 is accurately pressed into the bearing seat 21, and at the same time, it does not affect the subsequent operation of switching to the second position to release the support and remove the positioning sleeve 100, further improving the reliability and convenience of tooling use.

[0063] Please combine Figure 2 , Figure 5 as well as Figure 6In one embodiment, the sidewall 120 includes a first segment 121 and a second segment 122 connected to the first segment 121. The first segment 121 is located on the side of the second segment 122 near the end wall 110. The inner diameter of the first segment 121 is larger than the inner diameter of the second segment 122, so that a stepped surface 123 is formed at the connection between the inner circumferential surface of the first segment 121 and the inner circumferential surface of the second segment 122. The stepped surface 123 is oriented in the same direction as the opening 101. The stepped surface 123 is used to limit the bearing seat 21.

[0064] When the bearing housing 21 is inserted into the inner cavity 102 of the positioning sleeve 100 through the opening 101, the stepped surface 123 can prevent the bearing housing 21 from extending excessively to the side near the end wall 110, ensuring that the bearing housing 21 is in a suitable position within the positioning sleeve 100, so that when the clamping rod 200 presses down the oil seal 10, the position of the bearing housing 21 can match the pressing position of the oil seal 10, thereby further improving the installation accuracy of the oil seal 10.

[0065] Please combine Figure 2 , Figure 5 as well as Figure 6 In one embodiment, the wall thickness of the first segment 121 is less than the wall thickness of the second segment 122. This embodiment achieves a larger inner diameter of the first segment 121 than the inner diameter of the second segment 122 by making the wall thickness of the first segment 121 less than the wall thickness of the second segment 122.

[0066] Please combine Figures 1 to 3 In one embodiment, a clearance groove 103 is provided on the side wall 120. The extension direction of the clearance groove 103 is along the axial direction of the positioning sleeve 100. The clearance groove 103 is used to avoid the connecting rod 22.

[0067] Specifically, one end of the connecting rod 22 is connected to the outer wall of the bearing housing 21, and the extension direction of the connecting rod 22 is along the radial direction of the bearing housing 21.

[0068] When the bearing housing 21 enters the inner cavity 102 of the positioning sleeve 100 through the opening 101, the clearance groove 103 can accommodate the connecting rod 22 extending outward from the bearing housing 21, so as to prevent the connecting rod 22 from being blocked by the side wall 120 and thus preventing the bearing housing 21 from smoothly entering the positioning sleeve 100.

[0069] Please combine Figures 1 to 3 In one embodiment, the clearance groove 103 extends through the sidewall 120 along the axial direction of the positioning sleeve 100, so that the interior of the positioning sleeve 100 can be observed through the clearance groove 103.

[0070] On the one hand, when the bearing housing 21 enters the inner cavity 102 of the positioning sleeve 100 from the opening 101, the clearance groove 103 ensures that the connecting rod 22 is accommodated without obstruction within the clearance groove 103, avoiding interference between the connecting rod 22 and the side wall 120, which would make it difficult to fit the bearing housing 21. On the other hand, the clearance groove 103 penetrates the side wall 120 along the axial direction of the positioning sleeve 100, thereby completely exposing the internal space enclosed by the side wall 120. This allows maintenance personnel to check the pressing progress of the oil seal 10 in real time, whether it is aligned with the inner hole of the bearing housing 21, and whether there is any skewing or deformation. This avoids damage to the oil seal 10 due to excessive pressure caused by the inability to observe the interior, or seal failure due to improper installation, further ensuring the installation quality of the oil seal 10, reducing the workload of repeated adjustments, and lowering maintenance costs.

[0071] Please combine Figure 2 , Figures 5 to 6 In one embodiment, a handle 800 is installed at one end of the clamping rod 200 outside the positioning sleeve 100, so that the clamping rod 200 can be rotated by holding the handle 800, which facilitates the rotation of the clamping rod 200.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An oil seal installation fixture for installing an oil seal into a connecting rod bearing housing, the connecting rod bearing housing comprising a bearing housing and a connecting rod connected to the outer wall of the bearing housing, characterized in that, The oil seal installation fixture includes: A positioning sleeve includes an end wall and a side wall. The end wall has a through hole, and one end of the side wall is connected to the end wall so that the side wall and the end wall enclose an inner cavity. The end of the side wall away from the end wall forms an opening. The positioning sleeve is used to be fitted onto the bearing seat. A clamping rod, threadedly connected to the through hole, one end of which extends into the positioning sleeve, and the other end extends out of the positioning sleeve; and The positioning seat is rotatably connected to one end of the clamping rod that extends into the positioning sleeve via a bearing, and the positioning seat is used for the oil seal to be fitted onto its outer circumferential surface.

2. The oil seal installation fixture according to claim 1, characterized in that, The end of the clamping rod that extends into the positioning sleeve is provided with a boss. The outer diameter of the boss is larger than the outer diameter of the clamping rod. The positioning seat is rotatably connected to the boss through a bearing.

3. The oil seal installation fixture according to claim 1, characterized in that, It also includes a support frame, which is movably connected to the positioning sleeve so that the support frame can switch between a first position and a second position; In the first position, the support frame is located at the end of the positioning sleeve having the opening to support the sleeved bearing seat; In the second position, the support frame moves away from the end of the positioning sleeve with the opening to release the support on the bearing seat.

4. The oil seal installation fixture according to claim 3, characterized in that, The support frame is rotatably connected to the positioning sleeve via a pin about an axis in a first direction, which is perpendicular to the axial direction of the positioning sleeve.

5. The oil seal installation fixture according to claim 4, characterized in that, The support frame includes a bottom support and two side support parts. The two side support parts are respectively connected to both ends of the bottom support and are located on both sides of the positioning sleeve. The ends of the two side support parts away from the bottom support are respectively rotatably connected to the side wall of the positioning sleeve by pins.

6. The oil seal installation fixture according to claim 1, characterized in that, The sidewall includes a first segment and a second segment connected to the first segment. The first segment is located on the side of the second segment closer to the end wall. The inner diameter of the first segment is larger than the inner diameter of the second segment, so that the connection between the inner circumferential surface of the first segment and the inner circumferential surface of the second segment forms a stepped surface, and the orientation of the stepped surface is the same as the orientation of the opening. The stepped surface is used to limit the bearing seat.

7. The oil seal installation fixture according to claim 6, characterized in that, The wall thickness of the first segment is less than that of the second segment.

8. The oil seal installation fixture according to claim 1, characterized in that, The side wall is provided with a clearance groove, which extends along the axial direction of the positioning sleeve, and the clearance groove is used to avoid the connecting rod.

9. The oil seal installation fixture according to claim 8, characterized in that, The clearance groove extends through the side wall along the axial direction of the positioning sleeve, so that the interior of the positioning sleeve can be observed through the clearance groove.

10. The oil seal installation fixture according to claim 1, characterized in that, A handle is installed at one end of the clamping rod located outside the positioning sleeve.

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