Usage method of a tooling for accurately positioning and press-fitting the front oil seal of a crankshaft

Abstract

The present invention relates to a method for using a tooling for accurately positioning and press-fitting the front crankshaft oil seal. The tooling for the front crankshaft oil seal is composed of an oil pump positioning sleeve, an oil seal positioning sleeve, and an oil seal press head. The oil pump positioning sleeve is sleeved on the front end of the engine crankshaft. The front end of the crankshaft passes through the central hole of the oil pump. The oil pump positioning sleeve is sleeved on the front end of the crankshaft through the central hole of the oil pump. An oil seal groove is provided in the central hole, and a front crankshaft oil seal is installed in the oil seal groove. The front crankshaft oil seal is positioned through the oil seal positioning sleeve, and the front crankshaft oil seal is installed through the oil seal press head. The front end of the crankshaft is a stepped shaft composed of an inner shaft and an outer shaft, and the diameter of the inner shaft is larger than that of the outer shaft. Generally, the present invention is reasonably designed and has the advantages of simple structure, convenient operation, and accurate positioning.

Description

Technical Field

[0001] The present invention belongs to the technical field of engine oil seal equipment, and particularly relates to a method for using a tooling for accurately positioning and pressing a front crankshaft oil seal. Background Art

[0002] The function of the oil pump is to raise the engine oil to a certain pressure and then force it to be pressed onto the moving surfaces of various engine parts. When manually installing the engine oil pump, it is very difficult to ensure the concentricity between the central hole of the oil pump and the center of the crankshaft, which easily causes oil leakage problems in the front crankshaft oil seal installed later. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for using a tooling for accurately positioning and pressing a front crankshaft oil seal, which has a simple structure, is convenient to operate, and can accurately position the tooling.

[0004] The purpose of the present invention is achieved as follows: A tooling for accurately positioning and pressing a front crankshaft oil seal consists of an oil pump positioning sleeve, an oil seal positioning sleeve, and an oil seal pressing head. The oil pump positioning sleeve is sleeved on the front end of the engine crankshaft, the front end of the crankshaft passes through the central hole of the oil pump, the oil pump positioning sleeve passes through the central hole of the oil pump and is sleeved on the front end of the crankshaft. An oil seal groove is provided in the central hole, and a front crankshaft oil seal is installed in the oil seal groove. The front crankshaft oil seal is positioned by the oil seal positioning sleeve and installed by the oil seal pressing head. The front end of the crankshaft is a stepped shaft composed of an inner shaft and an outer shaft, and the diameter of the inner shaft is larger than that of the outer shaft.

[0005] The oil pump is positioned and installed through the oil pump positioning sleeve, and the oil pump is fixed on the front side plate of the engine cylinder block by positioning screws.

[0006] There are three positioning screws, and screw holes corresponding to the positioning screws are provided on the front side plate of the engine cylinder block.

[0007] The oil pump positioning sleeve is cylindrical, and a stepped hole is machined in the oil pump positioning sleeve. The diameter of the upper part of the stepped hole is the same as the diameter of the inner shaft at the front end of the crankshaft, and the diameter of the lower part of the stepped hole is the same as the diameter of the outer shaft at the front end of the crankshaft. The outer diameter of the oil pump positioning sleeve is the same as the inner diameter of the central hole, and the diameter of the convex ring in the upper middle part of the outer side of the oil pump positioning sleeve is larger than the inner diameter of the central hole.

[0008] The oil seal positioning sleeve is frustum-shaped, and a through hole with the same diameter as the outer shaft at the front end of the crankshaft is machined inside the oil seal positioning sleeve. The outer diameter of the large end of the oil seal positioning sleeve is the same as the diameter of the inner shaft at the front end of the crankshaft.

[0009] The front crankshaft oil seal is circular, and the inner diameter and outer diameter of the front crankshaft oil seal are the same as the diameter of the inner shaft and the inner diameter of the central hole at the front end of the crankshaft, respectively.

[0010] The top end of the described oil seal press head is provided with a cylindrical groove, and the diameter of the groove is the same as the diameter of the inner shaft at the front end of the crankshaft.

[0011] Working steps:

[0012] Step 1: Sleeve the oil pump onto the inner side of the front end of the crankshaft through the central hole.

[0013] Step 2: Fit the oil pump positioning sleeve onto the front end of the crankshaft and press the oil pump tightly against the front side of the engine cylinder block.

[0014] Step 3: Install the three positioning screws on the oil pump.

[0015] Step 4: Remove the oil pump positioning sleeve.

[0016] Step 5: Fit the oil seal positioning sleeve onto the front end of the crankshaft.

[0017] Step 6: Put the front crankshaft oil seal on the oil seal positioning sleeve and press it inward along the front end of the crankshaft into the oil seal groove of the central hole.

[0018] Step 7: Use the oil seal press head to press the installed front crankshaft oil seal in place.

[0019] Step 8: Remove the oil seal press head and the oil seal positioning sleeve, and the pressing installation of the front crankshaft oil seal is completed.

[0020] Advantages of the present invention: The present invention uses three positioning workpieces to ensure the installation sealing performance of the front crankshaft oil seal, uses the oil pump positioning sleeve to ensure the concentricity between the central hole of the oil pump and the center of the crankshaft. The oil seal positioning sleeve and the oil seal press head are used in combination, which can make the front crankshaft oil seal be accurately installed in place, ensuring the sealing performance of the oil pump installation. When the present invention is in use, the accurate installation of the oil seal can be completed by operating according to the inherent steps, which is simple and practical and greatly improves the work efficiency. Generally, the present invention is reasonably designed and has the advantages of simple structure, convenient operation and accurate positioning. Brief Description of the Drawings

[0021] Figure 1 is a schematic structural view of the front crankshaft oil seal tooling of the present invention.

[0022] Figure 2 is a schematic structural view of the oil pump positioning sleeve in the present invention.

[0023] Figure 3 is a schematic structural view of the oil seal positioning sleeve in the present invention.

[0024] Figure 4 is a schematic structural view of the front crankshaft oil seal in the present invention.

[0025] Figure 5 is a schematic structural view of the oil seal press head in the present invention.

[0026] In the figure: 1. Oil pump positioning sleeve; 2. Oil seal positioning sleeve; 3. Front crankshaft oil seal; 4. Oil seal press head; 5. Engine crankshaft; 6. Front end of the crankshaft; 7. Front side plate of the engine cylinder block; 8. Oil pump; 9. Oil seal groove; 10. Central hole; 11. Positioning screw; 12. Screw hole. Detailed implementation mode

[0027] The present invention will be further described below in conjunction with the accompanying drawings. Embodiment

[0028] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 As shown in [relevant figures], the front crankshaft oil seal tooling consists of an oil pump positioning sleeve 1, an oil seal positioning sleeve 2, and an oil seal press head 4. The oil pump positioning sleeve 1 is sleeved on the front end 6 of the engine crankshaft 5 for positioning the oil pump. The front end 6 of the crankshaft passes through the central hole 10 of the oil pump 8. The oil pump positioning sleeve 1 passes through the central hole 10 of the oil pump 8 and is sleeved on the front end 6 of the crankshaft. An oil seal groove 9 is provided in the central hole 10, and a front crankshaft oil seal 3 is installed in the oil seal groove 9. The front crankshaft oil seal 3 is positioned by the oil seal positioning sleeve 2 and installed by the oil seal press head 4. The front end 6 of the crankshaft is a stepped shaft composed of an inner shaft and an outer shaft, and the diameter of the inner shaft is larger than that of the outer shaft.

[0029] The present invention uses three positioning workpieces to ensure the installation sealing performance of the front crankshaft oil seal, uses the oil pump positioning sleeve to ensure the concentricity between the central hole of the oil pump and the center of the crankshaft, and the oil seal positioning sleeve and the oil seal press head are used in combination, so that the front crankshaft oil seal can be accurately installed in place, ensuring the sealing performance of the oil pump installation. Embodiment

[0030] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5As shown in the figure, a precision positioning and press-fitting tooling for the front crankshaft oil seal consists of an oil pump positioning sleeve 1, an oil seal positioning sleeve 2, and an oil seal pressing head 4. The oil pump positioning sleeve 1 is sleeved on the front end 6 of the engine crankshaft 5 for positioning the oil pump. The front end 6 of the crankshaft passes through the central hole 10 of the oil pump 8. The oil pump positioning sleeve 1 passes through the central hole 10 of the oil pump 8 and is sleeved on the front end 6 of the crankshaft. An oil seal groove 9 is provided in the central hole 10, and a front crankshaft oil seal 3 is installed in the oil seal groove 9. The front crankshaft oil seal 3 is positioned by the oil seal positioning sleeve 2 and installed by the oil seal pressing head 4. The front end 6 of the crankshaft is a stepped shaft composed of an inner shaft and an outer shaft, and the diameter of the inner shaft is larger than that of the outer shaft. The oil pump 8 is positioned and installed through the oil pump positioning sleeve 1. The oil pump 8 is fixed on the front side plate 7 of the engine cylinder block by three positioning screws 11. Corresponding screw holes 12 are provided in the front side plate 7 of the engine cylinder block for the positioning screws 11. The oil pump positioning sleeve 1 is cylindrical, and a stepped hole is machined inside the oil pump positioning sleeve 1. The diameter of the upper part of the stepped hole is the same as that of the inner shaft of the front end 6 of the crankshaft, and the diameter of the lower part of the stepped hole is the same as that of the outer shaft of the front end 6 of the crankshaft. The outer diameter of the oil pump positioning sleeve 1 is the same as the inner diameter of the central hole 10. The diameter of the convex ring at the upper middle part of the outer side of the oil pump positioning sleeve 1 is larger than the inner diameter of the central hole 10. The oil seal positioning sleeve 2 is frustum-shaped, and a through hole with the same diameter as the outer shaft of the front end 6 of the crankshaft is machined inside the oil seal positioning sleeve 2. The outer diameter of the large end of the oil seal positioning sleeve 2 is the same as the inner diameter of the inner shaft of the front end 6 of the crankshaft. The front crankshaft oil seal 3 is ring-shaped, and the inner diameter and outer diameter of the front crankshaft oil seal 3 are respectively the same as the inner diameter of the inner shaft of the front end 6 of the crankshaft and the inner diameter of the central hole 10. A cylindrical groove is provided at the top end of the oil seal pressing head 4, and the diameter of the groove is the same as the diameter of the inner shaft of the front end 6 of the crankshaft.

[0031] Steps for installing the front crankshaft oil seal:

[0032] Step 1: Pass the oil pump through the central hole and sleeve it on the inner side of the front end of the crankshaft.

[0033] Step 2: Sleeve the oil pump positioning sleeve on the front end of the crankshaft and press the oil pump tightly against the front side of the engine cylinder block.

[0034] Step 3: Install the three positioning screws on the oil pump.

[0035] Step 4: Remove the oil pump positioning sleeve.

[0036] Step 5: Sleeve the oil seal positioning sleeve on the front end of the crankshaft.

[0037] Step 6: Sleeve the front crankshaft oil seal on the oil seal positioning sleeve and press it inward along the front end of the crankshaft into the oil seal groove in the central hole.

[0038] Step 7: Use the oil seal pressing head to press the installed front crankshaft oil seal firmly in place.

[0039] Step 8: Remove the oil seal press head and the oil seal positioning sleeve, and the front crankshaft oil seal pressing is completed.

[0040] When the present invention is in use, the precise installation of the oil seal can be completed by operating according to the inherent steps, which is simple and practical, and greatly improves the work efficiency.

Claims

1. A method of using a precision positioning tooling for pressing the front oil seal of a crankshaft, characterized in that, It includes the following steps: Step 1: Sleeve the oil pump on the inner side of the front end of the crankshaft through the central hole; Step 2: Sleeve the oil pump positioning sleeve on the front end of the crankshaft, and press the oil pump tightly against the front side of the engine cylinder block; Step 3: Install three positioning screws on the oil pump; Step 4: Remove the oil pump positioning sleeve; Step 5: Sleeve the oil seal positioning sleeve on the front end of the crankshaft; Step 6: Sleeve the front crankshaft oil seal on the oil seal positioning sleeve, and press it inward along the front end of the crankshaft into the oil seal groove of the central hole; Step 7: Use the oil seal pressing head to press the installed front crankshaft oil seal in place; Step 8: Remove the oil seal pressing head and the oil seal positioning sleeve, and the pressing installation of the front crankshaft oil seal is completed; The front crankshaft oil seal tooling consists of an oil pump positioning sleeve, an oil seal positioning sleeve and an oil seal pressing head. The oil pump positioning sleeve is sleeved on the front end of the crankshaft of the engine crankshaft. The front end of the crankshaft passes through the central hole of the oil pump. The oil pump positioning sleeve passes through the central hole of the oil pump and is sleeved on the front end of the crankshaft. An oil seal groove is provided in the central hole. A front crankshaft oil seal is installed in the oil seal groove. The front crankshaft oil seal is positioned through the oil seal positioning sleeve. The front crankshaft oil seal is installed through the oil seal pressing head. The front end of the crankshaft is a stepped shaft composed of an inner shaft and an outer shaft, and the diameter of the inner shaft is larger than that of the outer shaft; The oil pump is positioned and installed through the oil pump positioning sleeve, and the oil pump is fixed on the front side plate of the engine cylinder block through positioning screws; There are three positioning screws, and screw holes corresponding to the positioning screws are provided on the front side plate of the engine cylinder block; The oil pump positioning sleeve is cylindrical. A stepped hole is machined in the oil pump positioning sleeve. The diameter of the upper part of the stepped hole is the same as the diameter of the inner shaft at the front end of the crankshaft. The diameter of the lower part of the stepped hole is the same as the diameter of the outer shaft at the front end of the crankshaft. The outer diameter of the oil pump positioning sleeve is the same as the inner diameter of the central hole. The diameter of the convex ring at the middle and upper part of the outer side of the oil pump positioning sleeve is larger than the inner diameter of the central hole; The oil seal positioning sleeve is frustum-shaped. A through hole with the same diameter as the outer shaft at the front end of the crankshaft is machined inside the oil seal positioning sleeve. The outer diameter of the large end of the oil seal positioning sleeve is the same as the diameter of the inner shaft at the front end of the crankshaft; The front crankshaft oil seal is circular. The inner diameter and outer diameter of the front crankshaft oil seal are respectively the same as the diameter of the inner shaft and the inner diameter of the central hole at the front end of the crankshaft; The top end of the oil seal pressing head is provided with a cylindrical groove, and the diameter of the groove is the same as the diameter of the inner shaft at the front end of the crankshaft.

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