Press fitting method for oil seal of diesel engine

Abstract

The invention provides a diesel engine oil seal press-fitting method, and relates to the technical field of oil seal press-fitting. According to the diesel engine oil seal press-fitting method, a supporting assembly, an oil seal press-in device and a servo electric cylinder control module are included. A servo electric oil cylinder is arranged on a supporting assembly, an oil seal press-in device is installed on an output shaft of the servo electric oil cylinder, an oil seal is loaded in the oil seal press-in device, the servo electric oil cylinder drives the oil seal press-in device to move towards the front end of a diesel engine crankshaft, and therefore the oil seal is pressed into an oil seal opening in the front end of the diesel engine crankshaft. The pressure sensor is installed at the end of the output shaft of the servo electric oil cylinder, so that when the end of the oil seal press-in device makes contact with the front end of the crankshaft of the diesel engine, large pressure can be generated, the generated pressure value is transmitted into the data acquisition module, the stroke of the servo electric oil cylinder is calculated, and the stroke of the servo electric oil cylinder is calculated. And the servo electric oil cylinder moves according to a set stroke so as to ensure the press-in depth of the oil seal.

Description

Technical Field

[0001] This application relates to the field of oil seal pressing, and more specifically, to a method for pressing a diesel engine oil seal. Background Art

[0002] The gear chamber oil seal of an engine is a part installed on the gear chamber at the front end of the engine, mainly composed of a skeleton and a lip. The skeleton plays a role in fixing the oil seal, and the rubber on the skeleton is fixed on the inner wall of the front end hole of the gear chamber. The lip contacts the outer circumference of the front end of the crankshaft to play a sealing role. The oil seal and the gear chamber are in an interference fit, and the frictional force generated during the pressing process is relatively large, making it impossible to be pressed manually and requiring equipment for pressing. The existing pressing methods are to manually control the pressing tool to press the oil seal or to control the bracket to press the oil seal through a servo electric oil cylinder. However, in the methods of manual control and servo electric oil cylinder control, the pressing depth of the oil seal is inconsistent, and it is easy to have the situation that the pressing depth of the oil seal is too shallow or too deep. Therefore, we propose a method for pressing a diesel engine oil seal. Summary of the Invention

[0003] In order to overcome the existing deficiencies, the embodiments of this application provide a method for pressing a diesel engine oil seal, which can solve the problem of inconsistent pressing depth of the above-mentioned oil seal.

[0004] The technical solution adopted by the embodiments of this application to solve its technical problems is: A method for pressing a diesel engine oil seal, including a support assembly, an oil seal pressing device, and a servo electric cylinder control module.

[0005] A servo electric oil cylinder is installed on the support assembly. The oil seal pressing device is connected to the output shaft of the servo electric oil cylinder. The servo electric cylinder control module controls the servo electric oil cylinder to drive the oil seal pressing device to move.

[0006] And the following steps:

[0007] S1. Positioning the diesel engine, fixing the diesel engine, and at the same time making the oil seal port of the diesel generator correspond to the oil seal pressing device;

[0008] S2. Install the oil seal on the oil seal pressing device, and make the servo electric oil cylinder drive the oil seal pressing device to move towards the engine oil seal port;

[0009] S3. The servo electric cylinder control module controls the servo electric oil cylinder to run a set displacement according to the set program to ensure the pressing depth of the oil seal;

[0010] S4. After the oil seal is pressed, the servo electric cylinder control module controls the servo electric oil cylinder to perform a return movement, and the oil seal pressing device returns to its original position.

[0011] In a specific implementation, the oil seal pressing device includes a connecting seat, which is connected to a servo electric oil cylinder. One end of the connecting seat is connected with a pressing sleeve, and a loading sleeve for loading the oil seal is slidably sleeved on the pressing sleeve. An oil seal accommodating interval is formed between the end face of the loading sleeve and the pressing sleeve.

[0012] In a specific implementation, a strip-shaped through hole is formed in the loading sleeve, and a screw is threadedly connected to the outer wall of the pressing sleeve. The head of the screw is slidably disposed in the strip-shaped through hole.

[0013] In a specific implementation, an installation port is formed in the connecting seat, which is correspondingly arranged with the output shaft of the servo electric oil cylinder. A contact head for contacting the end face of the engine crankshaft is slidably disposed in the pressing sleeve. A contact block for contacting the output shaft of the servo electric oil cylinder is slidably disposed in the installation port. A groove is formed at one end of the contact head, and a rectangular spring is connected between the groove and the contact block.

[0014] In a specific implementation, a connecting plate is fixedly sleeved on the output shaft of the servo electric oil cylinder. The connecting plate is connected to the connecting seat. A pressure sensor is installed at the end of the output shaft of the servo electric oil cylinder, and the pressure sensor is in contact with the contact block.

[0015] In a specific implementation, an installation groove is formed on the side wall of one end of the loading sleeve, and a positioning rod is installed on the end face of the pressing sleeve. A compression spring is connected between the installation groove and the end face of the pressing sleeve, and the compression spring is slidably sleeved on the positioning rod.

[0016] In a specific implementation, the servo electric cylinder control module includes a data acquisition module, a precision control module, and a speed control module. The data acquisition module is used to acquire the working data of the servo electric oil cylinder. The precision control module controls the working precision of the servo electric oil cylinder according to the acquired data. The speed control module controls the stroke speed of the servo motor oil cylinder.

[0017] In a specific implementation, the data acquisition module also acquires the data generated by the pressure sensor, so that the pressure value change generated by the steel collision between the pressure sensor and the front end face of the diesel engine crankshaft is transmitted to the data acquisition module to start calculating the stroke of the servo electric oil cylinder, and the servo electric oil cylinder performs a stroke movement according to the set value.

[0018] In a specific implementation, the servo electric cylinder control module further includes an adjustment module. In step S4, the adjustment module is used to control the forward and return strokes of the output shaft of the servo electric oil cylinder.

[0019] In a specific embodiment, a bracket assembly is further installed on the support assembly. In step S1, the bracket assembly is used to support the diesel engine and align the crankshaft oil seal port of the diesel engine with the oil seal pressing device.

[0020] The advantages of the embodiments of the present application are as follows: By providing a servo electric oil cylinder on the support assembly, an oil seal pressing device is installed on the output shaft of the servo electric oil cylinder, and the oil seal is loaded inside the oil seal pressing device. The servo electric oil cylinder drives the oil seal pressing device to move towards the front end of the diesel engine crankshaft, so as to press the oil seal into the oil seal port at the front end of the diesel engine crankshaft to complete the oil seal pressing. By installing a pressure sensor at the end of the output shaft of the servo electric oil cylinder, when the end of the oil seal pressing device contacts the front end of the diesel engine crankshaft, a relatively large pressure will be generated, and the generated pressure value will be transmitted into the data acquisition module to calculate the stroke of the servo electric oil cylinder, so that the servo electric oil cylinder moves according to the set stroke to ensure the oil seal pressing depth. By opening an installation groove at one end of the loading sleeve and connecting a compression spring between the installation groove and the end face of the pressing sleeve, when pressing the oil seal, after the loading sleeve contacts the front end face of the diesel engine crankshaft, the pressing sleeve will squeeze the compression spring, and then when the servo electric oil cylinder returns, the loading sleeve will be automatically reset by the compression spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the first perspective of the diesel engine oil seal pressing method provided by the embodiment of the present application;

[0022] Figure 2 It is a schematic structural diagram of the second perspective of the diesel engine oil seal pressing method provided by the embodiment of the present application;

[0023] Figure 3 It is a sectional structural diagram of the oil seal pressing device of the diesel engine oil seal pressing method provided by the embodiment of the present application;

[0024] Figure 4 It is a servo electric cylinder control module diagram of the diesel engine oil seal pressing method provided by the embodiment of the present application;

[0025] Figure 5 It is a diagram of the oil seal pressing step of the diesel engine oil seal pressing method provided by the embodiment of the present application;

[0026] Figure 6 is Figure 1 a partial enlarged view of part A in

[0027] In the figure: 10 - connecting seat; 110 - press - fitting sleeve; 120 - loading sleeve; 130 - oil - seal accommodation area; 20 - strip - shaped through - hole; 210 - screw; 30 - mounting port; 40 - contact head; 410 - contact block; 420 - groove; 430 - rectangular spring; 60 - mounting groove; 610 - positioning rod; 620 - compression spring. Detailed implementation manners

[0028] The technical solutions in the embodiments of the present application are to solve the problem of inconsistent press - fitting depths of oil seals as follows:

[0029] Embodiment:

[0030] Please refer to Figures 1-6 , a method for press - fitting a diesel - engine oil seal, including a support assembly, an oil - seal press - in device, and a servo - cylinder control module.

[0031] A servo - electric oil cylinder is installed on the support assembly. The servo - electric oil cylinder is horizontally arranged on the support assembly. The oil - seal press - in device is connected to the output shaft of the servo - electric oil cylinder. The servo - cylinder control module controls the servo - electric oil cylinder to drive the oil - seal press - in device to move. The servo - electric oil cylinder drives the oil - seal press - in device to move horizontally to press - fit the oil seal into the oil - seal port at the front end of the diesel - engine crankshaft.

[0032] And the following steps:

[0033] S1. Positioning of the diesel engine: Fix the diesel engine and at the same time align the oil - seal port of the diesel generator with the oil - seal press - in device. A bracket assembly is also installed on the support assembly. In step S1, the bracket assembly is used to support the diesel engine and at the same time align the oil - seal port of the diesel - engine crankshaft with the oil - seal press - in device. The diesel engine is hoisted onto the bracket assembly by an existing hoisting device, and at the same time the oil - seal port at the front end of the diesel - engine crankshaft is aligned with the oil - seal press - in device.

[0034] S2. Install the oil seal on the oil - seal press - in device, and make the servo - electric oil cylinder drive the oil - seal press - in device to move towards the engine oil - seal port. After the oil seal is installed in the oil - seal press - in device, at this time the oil seal is correspondingly arranged with the oil - seal port at the front end of the diesel - engine crankshaft. Then, it is only necessary to drive the oil - seal press - in device towards the oil - seal port at the front end of the diesel - engine crankshaft through the servo - electric oil cylinder.

[0035] S3. The servo - cylinder control module controls the servo - electric oil cylinder to run a set displacement according to the set program to ensure the press - fitting depth of the oil seal. When setting, when the front end of the oil - seal press - in device contacts the front end of the diesel - engine crankshaft, the servo - electric oil cylinder can travel the set stroke according to the set program.

[0036] S4. After the oil - seal press - fitting is completed, the servo - cylinder control module controls the servo - electric oil cylinder to perform a return movement, and the oil - seal press - in device returns to its original position.

[0037] Refer to Figure 3 Figure 3 , the oil seal pressing device includes a connecting seat 10, the connecting seat 10 is connected to a servo electric oil cylinder, and one end of the connecting seat 10 is connected with a pressing sleeve 110. A loading sleeve 120 for loading the oil seal is slidably sleeved on the pressing sleeve 110. An oil seal accommodating section 130 is formed between the end face of the loading sleeve 120 and the pressing sleeve 110. Specifically, a chamfer is provided at the end of the oil seal accommodating section 130 to facilitate inserting the oil seal into the oil seal accommodating section 130. The oil seal accommodating section 130 corresponds to the oil seal opening at the front end of the diesel engine crankshaft. Further, the pressing sleeve 110 is detachably connected to the connecting seat 10. Specifically, a screw hole is provided on the end face of the connecting seat 10, and a mounting hole corresponding to the screw hole is provided at the end of the pressing sleeve 110. By passing a screw through the mounting hole and connecting it to the screw hole, the pressing sleeve 110 can be installed on the connecting seat 10 to facilitate disassembly, assembly, and maintenance.

[0038] Refer to Figure 3 Figure 3 , a strip-shaped through hole 20 is provided on the loading sleeve 120, and a screw 210 is threadedly connected to the outer wall of the pressing sleeve 110. The head of the screw 210 slides in the strip-shaped through hole 20. During setting, a screw hole is also provided on the outer wall of the pressing sleeve 110, and the screw 210 is adapted to the screw hole, so that the head of the screw 210 slides in the strip-shaped through hole 20, which can limit the loading sleeve 120 and prevent the loading sleeve 120 from rotating during the oil seal pressing process.

[0039] Refer to Figure 3 Figure 3 , an installation port 30 is provided in the connecting seat 10, and the installation port 30 corresponds to the output shaft of the servo electric oil cylinder. A contact head 40 for contacting the end face of the engine crankshaft is slidably provided in the pressing sleeve 110. A contact block 410 for contacting the output shaft of the servo electric oil cylinder is slidably provided in the installation port 30. A groove 420 is provided at one end of the contact head 40, and a rectangular spring 430 is connected between the groove 420 and the contact block 410. During specific setting, the contact head 40 corresponds to the front end of the diesel engine crankshaft, the inner wall cross-section of the pressing sleeve 110 is T-shaped, and at the same time, the cross-section of the contact head 40 is T-shaped to prevent the contact head 40 from falling off the front end of the pressing sleeve 110. The contact block 410 is adapted to the installation port 30, and at the same time, the contact block 410 is also T-shaped, and one end of the rectangular spring 430 is sleeved on the head of the contact block 410.

[0040] Refer to Figure 3, a connecting plate is fixedly sleeved on the output shaft of the servo electric oil cylinder. The connecting plate is connected to the connecting seat 10. A pressure sensor is installed at the end of the output shaft of the servo electric oil cylinder. The pressure sensor is in contact with the contact block 410. It should be noted that the pressure sensor is not shown in the figure. Connecting holes are provided on both the connecting plate and the connecting seat 10. Thus, through the existing screw-nut connection structure, the connecting seat 10 can be installed on the connecting plate. At the same time, the end of the output shaft of the servo electric oil cylinder is correspondingly arranged with the installation port 30. When the contact head 40 contacts the front end of the diesel engine crankshaft, the contact head 40 will be squeezed by the front end of the diesel engine crankshaft, causing the contact head 40 to squeeze the rectangular spring 430. The rectangular spring 430 will then apply pressure to the contact block 410, and further cause the contact block 410 to apply pressure to the pressure sensor at the end of the output shaft of the servo electric oil cylinder, so as to generate a large pressure when the oil seal pressing device contacts the front end of the diesel engine crankshaft, and then make the servo electric oil cylinder move according to the set stroke.

[0041] Refer to Figure 3 , an installation groove 60 is provided on the side wall at one end of the loading sleeve 120. A positioning rod 610 is installed on the end face of the press-fitting sleeve 110. A compression spring 620 is connected between the installation groove 60 and the end face of the press-fitting sleeve 110. The compression spring 620 is slidably sleeved on the positioning rod 610. When specifically set, after the loading sleeve 120 contacts the end of the diesel engine, the servo electric oil cylinder will continue to move. Thus, the loading sleeve 120 and the press-fitting sleeve 110 will squeeze the compression spring 620. When the servo electric oil cylinder returns, the compression spring 620 will drive the loading sleeve 120 to reset. The positioning rod 610 is used to reset the compression spring 620. Further, a gasket can be installed at the end of the press-fitting sleeve 110. The gasket can be replaced with gaskets of different thicknesses according to the press-fitting depth. Thus, when pressing the oil seal, the situation of over-pressing can be prevented. The press-fitting sleeve 110 drives the gasket to move. When the set press-fitting depth is reached, the gasket contacts the end of the loading sleeve 120, so as to prevent the servo electric oil cylinder from over-pressing. Specifically, the gasket can be installed on the end face of the press-fitting sleeve 110 through the existing screw-hole structure.

[0042] The servo electric cylinder control module includes a data acquisition module, a precision control module, and a speed control module. The data acquisition module is used to acquire the working data of the servo electric oil cylinder. The precision control module controls the working precision of the servo electric oil cylinder according to the acquired data. The speed control module controls the stroke speed of the servo motor oil cylinder. Specifically, the data acquisition module acquires the rotation speed of the motor for controlling the motor speed.

[0043] The data acquisition module also acquires the data generated by the pressure sensor, and conveys the pressure value change generated by the steel collision between the pressure sensor and the front end face of the diesel engine crankshaft to the data acquisition module to start calculating the stroke of the servo electric oil cylinder, so that the servo electric oil cylinder moves according to the set value.

[0044] The servo electric cylinder control module further includes an adjustment module. In step S4, the adjustment module is used to control the output shaft of the servo electric oil cylinder to move forward and return.

[0045] When this application is used:

[0046] The diesel engine is hoisted onto the bracket assembly by the hoisting device. At the same time, the front end of the diesel engine crankshaft is aligned with the oil seal pressing device, and then the diesel engine is fixed. The oil seal is inserted into the oil seal accommodating section 130 of the loading sleeve 120, and then the servo electric oil cylinder can be started. The output shaft of the servo electric oil cylinder drives the connecting seat 10 to move horizontally, thereby driving the pressing sleeve 110 and the loading sleeve 120 to move horizontally. When it travels to the contact head 40 contacting the front end of the diesel engine crankshaft, the contact head 40 will squeeze the rectangular spring 430, and the rectangular spring 430 will apply pressure to the contact block 410, causing the contact block 410 to apply pressure to the pressure sensor at the end of the output shaft of the servo electric oil cylinder. As a result, the pressure sensor increases vertically, and then the data acquisition module receives a signal of increased pressure to control the servo electric oil cylinder to continue moving according to the set stroke, so that the pressing sleeve 110 presses the oil seal into the oil seal opening at the front end of the diesel engine crankshaft. After the oil seal pressing is completed, the servo electric oil cylinder performs a return movement.

[0047] It should be noted that the specific model and specification of the servo electric oil cylinder need to be selected according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail here.

[0048] The power supply and principle of the servo electric oil cylinder are clear to those skilled in the art and will not be elaborated in detail here.

[0049] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A diesel engine oil seal press-fitting method, characterized in that: include A support assembly, on which a servo electric cylinder is installed; An oil seal pressing device, the oil seal pressing device is connected to the output shaft of the servo electric cylinder; A servo electric cylinder control module controls the servo electric cylinder so that the servo electric cylinder drives the oil seal pressing device to move; And the following steps: S1. Position the diesel engine, fix the diesel engine, and make the diesel generator oil seal port correspond to the oil seal pressing device; S2. Install the oil seal on the oil seal pressing device, and make the servo electric cylinder drive the oil seal pressing device to move toward the engine oil seal port; S3, the servo electric cylinder control module controls the servo electric cylinder to run the set displacement according to the set program to ensure the oil seal is pressed into the depth; S4. The oil seal is pressed in, and the servo electric cylinder control module controls the servo electric cylinder to perform a return motion, and the oil seal pressing device returns and resets.

2. The diesel engine oil seal press-fitting method according to claim 1, characterized in that: The oil seal pressing device comprises a connecting seat (10), the connecting seat (10) being connected to a servo electric oil cylinder, and one end of the connecting seat (10) being connected to a press-fitting sleeve (110), a loading sleeve (120) for loading the oil seal being slidably sleeved on the press-fitting sleeve (110), and an oil seal accommodating area (130) being formed between the loading sleeve (120) and the end surface of the press-fitting sleeve (110).

3. The diesel engine oil seal press-fitting method according to claim 2, characterized in that: The loading sleeve (120) is provided with a strip-shaped through hole (20), and a screw (210) is threadedly connected to the outer wall of the press-fitting sleeve (110), and the head of the screw (210) is slidably arranged in the strip-shaped through hole (20).

4. The diesel engine oil seal press-fitting method according to claim 2, characterized in that: The connection seat (10) is provided with an installation opening (30), the installation opening (30) being arranged corresponding to the output shaft of the servo electric cylinder, the press-fitting sleeve (110) is provided with a contact head (40) for contacting the end face of the engine crankshaft, the installation opening (30) is provided with a contact block (410) for contacting the output shaft of the servo electric cylinder, one end of the contact head (40) is provided with a groove (420), and a rectangular spring (430) is connected between the groove (420) and the contact block (410).

5. The diesel engine oil seal press-fitting method according to claim 4, characterized in that: A connecting plate is fixedly sleeved on the output shaft of the servo electric oil cylinder, and the connecting plate is connected to the connecting seat (10). A pressure sensor is installed at the end of the output shaft of the servo electric oil cylinder, and the pressure sensor is arranged in contact with the contact block (410).

6. The diesel engine oil seal press-fitting method according to claim 2, characterized in that: A mounting groove (60) is provided on a side wall at one end of the loading sleeve (120); a positioning rod (610) is installed on the end surface of the press-fitting sleeve (110); a compression spring (620) is connected between the mounting groove (60) and the end surface of the press-fitting sleeve (110); and the compression spring (620) is slidably sleeved on the positioning rod (610).

7. The diesel engine oil seal press-fitting method according to claim 5, characterized in that: The servo electric cylinder control module includes a data acquisition module, a precision control module, and a speed control module. The data acquisition module is used to acquire the working data of the servo electric cylinder. The precision control module controls the working precision of the servo electric cylinder according to the acquired data. The speed control module controls the stroke speed of the servo motor cylinder.

8. The diesel engine oil seal press-fitting method according to claim 7, characterized in that: The data acquisition module also acquires data generated by the pressure sensor, so that the pressure value changes caused by the pressure sensor and the front end surface of the diesel engine crankshaft are transmitted to the data acquisition module to start calculating the stroke of the servo electric cylinder, so that the servo electric cylinder moves according to the set value.

9. The diesel engine oil seal press-fitting method according to claim 1, characterized in that: The servo electric cylinder control module also includes a regulating module. In step S4, the regulating module is used to control the forward and return strokes of the servo electric cylinder output shaft.

10. The diesel engine oil seal press-fitting method according to claim 1, characterized in that: A bracket assembly is also installed on the support assembly. In step S1, the bracket assembly is used to support the diesel engine and make the diesel engine crankshaft oil seal correspond to the oil seal pressing device.

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