An oil seal positioning and assembly device and method of use thereof

Abstract

The application discloses an oil seal positioning and assembling device and a use method, and belongs to the technical field of oil seal positioning and assembling devices.The oil seal positioning and assembling device comprises a floating pin sleeve, a workbench, a spring, a pin sleeve seat, a first oil seal punch, an oil seal and a gear chamber.The gear chamber is arranged at the upper end of the workbench, the pin sleeve seat is installed at the lower end of the workbench and penetrates through the workbench, and the spring is arranged at the bottom of the floating pin sleeve, so that the floating pin sleeve can be arranged in the pin sleeve seat in a floating manner relative to up and down.The first oil seal punch is sequentially provided with a knocking part, a limiting part, an oil seal mounting part and a guide part from top to bottom.The oil seal is preassembled on the oil seal mounting part of the first oil seal punch, wherein an oil seal mounting subsidence amount boss is further arranged between the limiting part and the oil seal mounting part of the first oil seal punch, the guide part of the first oil seal punch is slidingly arranged in the floating pin sleeve, the limiting part is used for being in contact with the upper surface of the gear chamber, the knocking part is used for bearing the pressure applied from outside and driving the oil seal to be mounted on the oil seal mounting hole of the gear chamber in an interference fit.The double-punch and double-positioning mode ensure that the gear chamber and the oil seal are coaxially positioned, the oil seal is flat and normal, and the oil seal can be installed without damage.

Description

Technical Field

[0001] The invention belongs to the technical field of engine workstation tools, and in particular relates to an oil seal positioning and assembling device and a method for using the same. Background Art

[0002] Oil seal positioning assembly is widely used in engine assembly. It is mainly used to ensure that the oil seal is installed into the oil seal mounting hole of the gear chamber without damage, to ensure the crankshaft sealing requirements, and to meet the repeatable and controllable operation quality.

[0003] The existing oil seal assembly method is to use an oil seal punch to directly drive the oil seal into the gear chamber mounting hole. Due to unreliable initial positioning, the oil seal is often not driven correctly, and the installation process requires knocking and correcting. This process can easily lead to the oil seal rubber layer cutting or the rubber and the frame being rubbed off, and there are many hidden dangers in assembly quality.

[0004] Patent CN203495520U discloses a tool for pressing the oil seal of an engine gear chamber. The tool adopts a pressing machine and a pressing platform, and presses the oil seal through complex electrical equipment such as a cylinder and a foot valve, which is relatively costly.

[0005] The information disclosed in the above background technology section is only intended to increase the understanding of the overall background of the present invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the Invention

[0006] The purpose of the present invention is to provide an oil seal positioning and assembly device and a method for using the same, which adopts a double punch and a double positioning method to ensure that the gear chamber and the oil seal are in coaxial positioning, ensure that the oil seal is flat and non-destructive, and has simple tooling and low cost.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] The gear chamber is arranged at the upper end of the workbench, the pin sleeve seat is installed at the lower end of the workbench and passes through the workbench, and the spring is arranged at the bottom of the floating pin sleeve so that the floating pin sleeve can be arranged in the pin sleeve seat so as to float up and down relatively; the first oil seal punch is provided with a knocking part, a limiting part, an oil seal mounting part and a guide part in sequence from top to bottom; the oil seal can be pre-installed on the oil seal mounting part of the first oil seal punch, wherein an oil seal mounting sinking amount boss is also provided between the limiting part of the first oil seal punch and the oil seal mounting part, and the guide part of the first oil seal punch is slidably arranged in the floating pin sleeve, the limiting part is used to contact the upper surface of the gear chamber, and the knocking part is used to bear the pressure applied from the outside and drive the oil seal to be installed on the oil seal mounting hole of the gear chamber with interference fit.

[0009] Specifically, it also includes a second oil seal punch, which is provided with a knocking part, a limiting part, an oil seal mounting part and a guide part with the same structure as the first oil seal punch from top to bottom; wherein an annular centering groove is also provided between the limiting part and the oil seal mounting part of the second oil seal punch, and the annular centering groove is used to combine with the outer peripheral surface of the oil seal.

[0010] Specifically, the depth of the annular centering groove is smaller than the thickness of the oil seal.

[0011] Specifically, an axial limiting groove is provided on the outer wall surface of the floating pin sleeve, and a limiting pin that cooperates with the axial limiting groove is provided on the inner wall of the pin sleeve seat.

[0012] Specifically, a ring groove is provided at the bottom of the floating pin sleeve, and one end of the spring is sleeved in the ring groove.

[0013] Specifically, the pin sleeve seat is further provided with an exhaust hole.

[0014] The present invention further discloses a method for using the oil seal positioning and assembly device, which uses the oil seal positioning and assembly device described above and includes the following steps:

[0015] S1: Install the pin sleeve seat on the workbench and fit the floating pin sleeve into the pin sleeve seat;

[0016] S2: Center the oil seal mounting hole of the gear chamber and the floating pin sleeve;

[0017] S3: Use the second oil seal punch to pre-press the oil seal, then slide the oil seal onto the oil seal mounting portion of the second oil seal punch. Slide the guide portion of the second oil seal punch onto the floating pin sleeve. The oil seal skeleton contacts the chamfered radius of the oil seal mounting hole in the gear chamber. Use the annular centering groove to synchronously center the outer peripheral surface of the oil seal and the inner lip. Use a steel hammer to strike the striking portion, simultaneously pressing the floating pin sleeve downward. When the oil seal partially enters the oil seal mounting hole in the gear chamber, replace it with the first oil seal punch and continue the manual operation.

[0018] S4: Slide the guide part of the first oil seal punch onto the floating pin sleeve, hammer the striking part, and the oil seal enters the oil seal mounting hole of the gear chamber flatly until the first oil seal punch contacts the top surface of the gear chamber and the oil seal is installed in place.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This solution ensures the stability and assembly accuracy of the device through the elastic up and down floating characteristics of the floating pin sleeve and the precise positioning of the axial limit groove; the division of labor design of the first oil seal punch and the second oil seal punch, especially the annular centering groove of the second punch and the oil seal installation sinking boss of the first punch, respectively achieve precise pre-compression and final installation of the oil seal, avoiding offset and excessive pressing; the design of the spring ring groove and the exhaust hole optimizes the operation process, improves the elastic reset and exhaust performance, and reduces assembly resistance; the entire device has a compact structure and simple and efficient operating steps, which is suitable for manual operation and mass production, significantly improving the quality and efficiency of oil seal assembly and reducing human errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of an oil seal positioning and assembly device in Example 1.

[0022] Figure 2 This is a schematic diagram of the first oil seal punch in Example 1.

[0023] Figure 3 Schematic diagram of the second oil seal punch in Example 1.

[0024] Figure 4 This is a schematic diagram of the axial limit groove and limit pin structure of Example 2.

[0025] Figure 5 This is a workflow diagram of the method for using an oil seal positioning and assembly device in Example 3.

[0026] In the figure, 1-floating pin sleeve; 2-working table; 3-spring; 4-pin sleeve seat; 5-first oil seal punch; 6-second oil seal punch; 7-oil seal; 8-gear chamber; 9-axial limit groove; 10-limit pin; 51-striking part; 52-guide part; 53-oil seal mounting part; 54-oil seal mounting sinking boss; 55-limiting part; 64-annular centering groove. DETAILED DESCRIPTION

[0027] To explain the technical content, objectives, and effects of the present invention in detail, the following embodiments are described in conjunction with the accompanying drawings. In the description of this embodiment, it should be understood that the terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only used to facilitate the description of this embodiment and simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0028] Example 1

[0029] The technical solution adopted in this embodiment is an oil seal positioning assembly device, such as Figure 1-4As shown, it comprises: a floating pin sleeve (1), a workbench (2), a spring (3), a pin sleeve seat (4), a first oil seal punch (5), an oil seal (7), and a gear chamber (8);

[0030] The gear chamber (8) is arranged at the upper end of the workbench (2), the pin sleeve seat (4) is installed at the lower end of the workbench (2) and passes through the workbench (2), and the spring (3) is arranged at the bottom of the floating pin sleeve (1), so that the floating pin sleeve (1) can be arranged in the pin sleeve seat (4) in a relatively floating manner.

[0031] The first oil seal punch (5) is provided with a knocking portion (51), a limiting portion (55), an oil seal mounting portion (52), and a guide portion (53) in sequence from top to bottom;

[0032] The oil seal (7) can be pre-installed on the oil seal mounting portion (52) of the first oil seal punch (5), wherein an oil seal mounting sinking boss (54) is further provided between the limiting portion (55) of the first oil seal punch (5) and the oil seal mounting portion (52), the guide portion (53) of the first oil seal punch (5) is slidably provided in the floating pin sleeve (1), the limiting portion (55) is used to contact the upper surface of the gear chamber (8), and the knocking portion (51) is used to bear the pressure applied from the outside and drive the oil seal (7) to be installed on the oil seal mounting hole of the gear chamber (8) in an interference fit.

[0033] As a preferred technical solution of this embodiment, a second oil seal punch (6) is further provided with a knocking portion, a limiting portion, an oil seal mounting portion, and a guide portion having the same structure as the first oil seal punch (5) from top to bottom. An annular centering groove (64) is further provided between the limiting portion and the oil seal mounting portion of the second oil seal punch (6). The annular centering groove (64) is used to engage with the outer peripheral surface of the oil seal (7). The outer peripheral surface of the oil seal 7 and the inner lip can be synchronously centered, thereby reducing the relative disturbance between the outer peripheral surface of the oil seal 7 and the inner lip and improving the centering accuracy.

[0034] The technical principle behind using a second oil seal punch for pre-pressing and the first oil seal punch for the second press-fit is to precisely control the oil seal's positioning and press-fitting process in stages and steps to ensure secure and accurate installation. Specifically, the second oil seal punch's primary function is to initially guide the seal's outer surface into alignment with the seal's mounting hole via an annular centering groove, completing the initial centering and pre-pressing of the seal. This ensures minimal pressure on the seal, preventing damage from excessive press-fitting forces. Furthermore, gentle pre-pressing ensures smooth contact between the seal and the hole wall, ensuring the seal's outer surface is correctly positioned.

[0035] In the second step, the first oil seal punch completes the precise final press-fit. Here, the first oil seal punch applies appropriate pressure through the striking portion and controls the installation depth of the oil seal using the oil seal installation depression boss, ensuring that the oil seal is pressed smoothly into the oil seal mounting hole and accurately positioned. The guide portion of the first oil seal punch cooperates with the floating pin sleeve to maintain stability during the press-fit process, preventing deformation or displacement of the oil seal due to excessive or uneven pressure.

[0036] The two-stage pre-pressing and press-fitting process reduces potential errors and uneven pressure during a single press-fit, effectively preventing deformation, damage, or misalignment of the oil seal during assembly. This phased press-fitting ensures more uniform and moderate force on the oil seal during installation, improving its sealing performance, installation quality, and service life. Furthermore, this method enhances assembly accuracy, reduces human error during the assembly process, and ensures high standards every time, thereby increasing production efficiency and reducing defective product rates.

[0037] Example 2

[0038] like Figure 4 As shown, on the basis of Example 1, the outer wall surface of the floating pin sleeve (1) is provided with an axial limit groove (9), and the inner wall of the pin sleeve seat (4) is provided with a limit pin that cooperates with the axial limit groove. Through the cooperation of the limit groove and the limit pin, the free floating of the floating pin sleeve during assembly or operation is effectively avoided, making the oil seal assembly process more precise and reducing the assembly deviation or poor assembly of the oil seal. At the same time, the setting of the limit groove and the limit pin can enhance the anti-interference ability of the system, making the operation during the assembly process more stable and reliable. In addition, this design simplifies the assembly steps, reduces complex adjustment work, improves production efficiency and reduces the difficulty of manual operation.

[0039] Example 3

[0040] Based on Example 1 and Example 2, this embodiment discloses a method for using an oil seal positioning and assembly device, such as Figure 5 As shown, the following steps are included:

[0041] S1: Install the pin sleeve seat (4) on the workbench, and assemble the floating pin sleeve (1) into the pin sleeve seat (4);

[0042] S2: Center the oil seal mounting hole of the gear chamber (8) and the floating pin sleeve (1);

[0043] S3: Use the second oil seal punch 6 to pre-press, slide the oil seal 7 onto the oil seal mounting portion of the second oil seal punch 6, slide the guide portion of the second oil seal punch 6 onto the floating pin sleeve (1), the oil seal skeleton portion contacts the chamfered circle of the oil seal mounting hole of the gear chamber 8, use the annular centering groove (64) to synchronously center the outer peripheral surface of the oil seal 7 and the inner lip, use a steel hammer to hammer the striking portion, and synchronously press the floating pin sleeve (1) downward, when the oil seal (7) partially enters the oil seal mounting hole of the gear chamber (8), replace it with the first oil seal punch (5), and continue manual operation;

[0044] S4: Slide the guide portion of the first oil seal punch (5) onto the floating pin sleeve 1, hammer the striking portion 51, and the oil seal (7) enters the oil seal mounting hole of the gear chamber (8) in a straight line until the first oil seal punch (5) contacts the top surface of the gear chamber (8), and the oil seal (7) is installed in place.

[0045] The device method ensures that the oil seal mounting hole and the oil seal are in coaxial double positioning, thereby improving the installation accuracy of the oil seal, having a simple structure and being easy to operate.

[0046] Although the present invention has been described in detail above using specific embodiments, it will be apparent to those skilled in the art that modifications or improvements may be made based on the present invention. Therefore, such modifications or improvements, which do not depart from the spirit of the present invention, are intended to fall within the scope of protection claimed herein.

Claims

1. An oil seal positioning and assembly device, characterized in that: include: Floating pin sleeve (1), workbench (2), spring (3), pin sleeve seat (4), first oil seal punch (5), second oil seal punch (6), oil seal (7), gear chamber (8); The gear chamber (8) is arranged at the upper end of the workbench (2), the pin sleeve seat (4) is installed at the lower end of the workbench (2) and passes through the workbench (2), and the spring (3) is arranged at the bottom of the floating pin sleeve (1), so that the floating pin sleeve (1) can be arranged in the pin sleeve seat (4) in a relatively floating manner. The first oil seal punch (5) is provided with a knocking portion (51), a limiting portion (55), an oil seal mounting portion (52), and a guide portion (53) in sequence from top to bottom; the oil seal (7) can be pre-installed on the oil seal mounting portion (52) of the first oil seal punch (5), wherein an oil seal mounting sinking boss (54) is further provided between the limiting portion (55) of the first oil seal punch (5) and the oil seal mounting portion (52); the guide portion (53) of the first oil seal punch (5) is slidably provided in the floating pin sleeve (1); the limiting portion (55) is used to contact the upper surface of the gear chamber (8); the knocking portion (51) is used to bear the pressure applied from the outside and drive the oil seal (7) to be installed on the oil seal mounting hole of the gear chamber (8) in an interference fit; The second oil seal punch (6) is provided with a striking portion, a limiting portion, an oil seal mounting portion, and a guide portion having the same structure as the first oil seal punch (5) from top to bottom; an annular centering groove (64) is further provided between the limiting portion and the oil seal mounting portion of the second oil seal punch (6), and the annular centering groove (64) is used to engage with the outer peripheral surface of the oil seal (7).

2. The oil seal positioning and assembly device according to claim 1, characterized in that: The depth of the annular centering groove (64) is less than the thickness of the oil seal (7).

3. The oil seal positioning and assembly device according to claim 1, characterized in that: An axial limiting groove (9) is provided on the outer wall of the floating pin sleeve (1), and a limiting pin that cooperates with the axial limiting groove is provided on the inner wall of the pin sleeve seat (4).

4. The oil seal positioning and assembly device according to claim 1, characterized in that: A ring groove is provided at the bottom of the floating pin sleeve (1), and one end of the spring (3) is sleeved in the ring groove.

5. The oil seal positioning and assembly device according to claim 1, characterized in that: The pin sleeve seat (4) is also provided with an exhaust hole.

6. A method for using an oil seal positioning and assembly device, which uses the oil seal positioning and assembly device according to any one of claims 1 to 5, characterized in that: The steps include: S1: Install the pin sleeve seat (4) on the workbench, and assemble the floating pin sleeve (1) into the pin sleeve seat (4); S2: Center the oil seal mounting hole of the gear chamber (8) and the floating pin sleeve (1); S3: Use the second oil seal punch (6) to pre-press, slide the oil seal (7) onto the oil seal mounting portion of the second oil seal punch (6), slide the guide portion of the second oil seal punch (6) onto the floating pin sleeve (1), the oil seal skeleton portion contacts the chamfered circle of the oil seal mounting hole of the gear chamber (8), use the annular centering groove (64) to synchronously center the outer peripheral surface of the oil seal (7) and the inner lip, use a steel hammer to hammer the striking portion, and synchronously press the floating pin sleeve (1) downward, when the oil seal (7) partially enters the oil seal mounting hole of the gear chamber (8), replace it with the first oil seal punch (5), and continue manual operation; S4: Slide the guide portion of the first oil seal punch (5) onto the floating pin sleeve (1), hammer the striking portion (51), and the oil seal (7) is evenly inserted into the oil seal mounting hole of the gear chamber (8) until the first oil seal punch (5) contacts the top surface of the gear chamber (8), and the oil seal (7) is installed in place.

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