Oil seal positioning and assembling device and using method thereof

Abstract

The invention discloses an oil seal positioning and assembling device and a using method. 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 bush seat is mounted at the lower end of the workbench and penetrates through the workbench, and the spring is arranged at the bottom of the floating pin bush, so that the floating pin bush can be arranged in the pin bush seat in a relatively up-down floating manner; 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; an oil seal is arranged on an oil seal installation part of the first oil seal punch in a preassembled mode, an oil seal installation deflection boss is further arranged between a limiting part of the first oil seal punch and the oil seal installation part, a guide part of the first oil seal punch is arranged in the floating pin sleeve in a sliding mode, and the limiting part is used for making contact with the upper surface of a gear chamber. And the knocking part is used for bearing external pressure and driving the oil seal to be mounted on an oil seal mounting hole of the gear chamber in an interference fit manner. And a double-punch and double-positioning mode is adopted to ensure that the gear chamber and the oil seal are positioned coaxially, and the oil seal is ensured to be flat, upright and undamaged to mount.

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 use method thereof. 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 punch the oil seal into the gear chamber mounting hole. Due to unreliable initial positioning, the oil seal is often not inserted correctly, and the installation process requires knocking and correcting. This process can easily lead to the cutting of the oil seal rubber layer or the separation of the rubber and the frame, 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, which uses a pressing machine and a pressing platform to press the oil seal through complex electrical equipment such as a cylinder and a foot valve, and the cost is relatively high.

[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 acknowledging or suggesting in any form that the information constitutes the prior art already known to a person 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 lossless, and has simple tooling and low cost.

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

[0008] An oil seal positioning and assembly 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 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 in a relatively floating manner up and down; 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 with 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 less than the thickness of the oil seal.

[0011] Specifically, an axial limit groove is formed on the outer wall surface of the floating pin sleeve, and a limit pin cooperating with the axial limit groove is disposed on the inner wall of the pin sleeve seat.

[0012] Specifically, a ring groove is arranged 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 also provided with an exhaust hole.

[0014] The present invention also discloses a method for using an oil seal positioning and assembling device, which uses the above-mentioned oil seal positioning and assembling device and comprises 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, slide the oil seal onto the oil seal mounting part of the second oil seal punch, slide the guide part of the second oil seal punch onto the floating pin sleeve, the oil seal skeleton part contacts the chamfered circle of the oil seal mounting hole of 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 hammer the striking part, and synchronously press the floating pin sleeve downward, when the oil seal part enters the oil seal mounting hole of 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 installation 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 realize the precise pre-pressing and final installation of the oil seal to avoid 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 the assembly resistance; the whole device has a compact structure and simple and efficient operation steps, which is suitable for manual operation and mass production, significantly improves the quality and efficiency of oil seal assembly, and reduces manual errors. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0023] Figure 3 This is a schematic diagram of the second oil seal punch of 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 a method for using an oil seal positioning and assembly device according to 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] In order to explain the technical content, purpose and effect of the present invention in detail, the following is an explanation in combination with the embodiments and the accompanying drawings. In the description of this embodiment, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of 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 penetrates 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 up and down;

[0031] The first oil seal punch (5) is provided with a striking 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 also 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, it also includes a second oil seal punch (6), which is provided with a knocking part, a limiting part, an oil seal mounting part, and a guide part in order from top to bottom, which are the same in structure as the first oil seal punch (5); wherein an annular centering groove (64) is also provided between the limiting part and the oil seal mounting part of the second oil seal punch (6), and the annular centering groove (64) is used to be combined 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, the relative disturbance amount between the outer peripheral surface of the oil seal 7 and the inner lip is reduced, and the centering accuracy is improved.

[0034] The technical principle of using the second oil seal punch for pre-pressing and the first oil seal punch for the second press-fitting is to accurately control the positioning and press-fitting process of the oil seal in stages and steps to ensure that the oil seal can be installed safely and accurately. Specifically, the main function of the second oil seal punch is to initially guide the docking of the outer peripheral surface of the oil seal with the oil seal mounting hole through the annular centering groove to complete the initial centering and pre-pressing of the oil seal. At this time, the oil seal is only subjected to a small pressure, which avoids damage to the oil seal caused by excessive press-fitting force. At the same time, the smooth contact between the oil seal and the hole wall is achieved through slow pre-pressing, ensuring the correct position of its outer peripheral surface.

[0035] In the second step, the first oil seal punch completes the precise final press-fitting. At this time, the first oil seal punch provides appropriate pressure through the knocking part, and controls the installation depth of the oil seal through the oil seal installation sinking boss, ensuring that the oil seal is pressed into the oil seal installation hole smoothly and reaches the accurate installation position. Because the guide part of the first oil seal punch cooperates with the floating pin sleeve, the stability during the press-fitting process is maintained, avoiding deformation or displacement of the oil seal caused by excessive pressure or uneven pressure.

[0036] The two-stage operation of pre-pressing and press-fitting reduces the errors or uneven pressure that may occur during a single press-fitting process, thereby effectively avoiding deformation, damage or positional displacement of the oil seal during assembly. The staged press-fitting makes the force on the oil seal more uniform and moderate during installation, which helps to improve the sealing performance, installation quality and service life of the oil seal. In addition, this method can improve assembly accuracy, reduce human errors during assembly, and ensure that each assembly meets high standards, thereby improving 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 provision 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 the 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 installation 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, improves the installation accuracy of the oil seal, has a simple structure and is easy to operate.

[0046] Although the present invention has been described in detail above with specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

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), 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 penetrates 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 up and down; The first oil seal punch (5) is provided with a striking 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 also 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.

2. The oil seal positioning and assembly device according to claim 1, characterized in that: It also includes a second oil seal punch (6), which is provided with a striking portion, a limiting portion, an oil seal mounting portion, and a guiding portion from top to bottom, which are the same in structure as the first oil seal punch (5); wherein an annular centering groove (64) is also 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 be combined with the outer peripheral surface of the oil seal (7).

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

4. The oil seal positioning and assembly device according to claim 2, characterized in that: An axial limit groove (9) is provided on the outer wall surface of the floating pin sleeve (1), and a limit pin cooperating with the axial limit groove is provided on the inner wall of the pin sleeve seat (4).

5. The oil seal positioning and assembly device according to claim 2, characterized in that: A ring groove is arranged at the bottom of the floating pin sleeve (1), and one end of the spring (3) is sleeved in the ring groove.

6. The oil seal positioning and assembly device according to claim 2, characterized in that: The pin sleeve seat (4) is also provided with an exhaust hole.

7. A method for using an oil seal positioning and assembly device, which adopts the oil seal positioning and assembly device according to any one of claims 2 to 6, 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 the 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) enters the oil seal installation 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.

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