Axle oil seal mounting tool and using method thereof

Abstract

According to the axle oil seal installation tool and the using method thereof, the tool comprises a locking mechanism, a connecting mechanism and a jacking mechanism, the locking mechanism and the jacking mechanism are connected to the two sides of the connecting mechanism respectively, and a positioning mechanism is arranged in the connecting mechanism; the use method comprises the following steps: selecting the positioning gasket with a proper inner hole according to the axle diameter of the axle, sleeving the positioning gasket and the oil seal into the axle, sleeving the cylinder body into the axle, sleeving the connecting seat into the axle and connecting the connecting seat with the cylinder body, and pushing the piston to move forwards through high-pressure gas to fix the pressure of the oil seal on the axle in place. The feeding amount of the piston is controlled by controlling the filling amount of high-pressure gas, then the press-in depth of the oil seal is controlled, the oil seal installation requirements of different axles can be met, an oil seal framework can be stably pressed and rapidly installed in place, the press-in depth of the oil seal framework is controllable in real time in the press-in process, the oil seal installation requirements of the different axles can be met, and the oil seal installation efficiency is improved. The structure is simple, the operation is convenient, and the universality is very high.

Description

Technical Field

[0001] The invention relates to a tool for installing an oil seal of a thin oil axle, belonging to the technical field of oil seal installation. Background Art

[0002] At present, the installation of the thin oil shaft oil seal is to first place the oil seal inner frame at the oil seal position, then support the oil seal inner frame with a sleeve, hit the other end of the sleeve with a hammer, and drive the oil seal to the oil seal of the shaft body through force conduction, and then push the rubber part of the oil seal into the inner frame for installation.

[0003] The above oil seal installation method will cause great damage to the oil seal internal frame, and even cause the frame to deform. According to statistics, the frame damage rate caused by this installation method is as high as 5%. In addition, the impact during the installation operation will induce burrs on the metal surface, which will cause the oil seal sealing performance to deteriorate and lead to oil leakage. The leakage problem will cause the oil to be missing when the vehicle is running, which will cause the temperature of the lubrication system to rise, and eventually may cause the bearing to lock due to insufficient lubrication. Summary of the invention

[0004] The present invention aims at the shortcomings of the existing axle oil seal installation technology, provides an axle oil seal installation tool with simple structure, convenient operation and strong versatility, and also provides a method for using the tool.

[0005] The axle oil seal installation tool of the present invention adopts the following technical solutions:

[0006] The tooling comprises a locking mechanism, a connecting mechanism and a pressing mechanism, wherein the locking mechanism and the pressing mechanism are respectively connected to both sides of the connecting mechanism, and a positioning mechanism is arranged in the connecting mechanism; the connecting mechanism is used to load the axle and realize radial positioning through the positioning mechanism, the locking mechanism is used to realize axial positioning of the axle, and the pressing mechanism is used to push the oil seal to be installed on the axle;

[0007] The locking mechanism is a locking nut;

[0008] The connecting mechanism comprises a connecting seat, the interior of which is provided with a propulsion air hole and a circuit air hole, and the connecting seat is connected to the cylinder body in the pressing mechanism;

[0009] The positioning mechanism is a positioning washer, and radial positioning of axles with different shaft diameters can be achieved by replacing washers with different inner diameters;

[0010] The pressing mechanism comprises a cylinder body and a piston. The cylinder body is connected to one end of a connecting seat in the connecting mechanism. An annular inner cavity is arranged in the cylinder body. The piston is placed in the annular inner cavity. A vent hole and an exhaust hole which are respectively connected to the propulsion air hole and the loop air hole are arranged on the bottom surface of the annular inner cavity. An end cover is connected to the open end of the annular inner cavity on the cylinder body. The piston extends out of the end cover, and the extended end is connected to a top plate.

[0011] Further:

[0012] The locking nut is installed on one side of the connection seat in the connection mechanism through a bearing. The bearing is a thrust ball bearing. A pressure plate for axially positioning the locking nut is provided on the connection seat, so that the locking nut can only rotate in the connection seat but cannot move axially.

[0013] The locking nut is provided with a handle rocker plate to facilitate the rotation of the locking nut. The handle rocker plate comprises a handle and a connecting plate, wherein the handle is connected to the outer end of the connecting plate, and the connecting plate is fixedly connected to the locking nut.

[0014] The outer ends of the propulsion air hole and the loop air hole are provided with pipe joints to connect to external air pipes. The inner hole of the connecting seat is provided with a gasket installation groove for installing a positioning gasket, and the gasket installation groove is provided on the end surface of the connecting seat connected to the cylinder body.

[0015] The cylinder body is provided with lifting ears for easy lifting.

[0016] Seals are provided between the piston and the side wall of the annular inner cavity and between the piston and the end cover, and a sealing gasket is provided between the end cover and the cylinder body to ensure that the high-pressure gas does not leak.

[0017] A guide belt is arranged between the piston and the side wall of the annular inner cavity to enable the piston to move smoothly.

[0018] A moving space is provided between the piston and the end cover, and an exhaust hole is processed in the piston. Both ends of the exhaust hole are respectively connected with the moving space and the loop air hole so that the high-pressure gas can be discharged smoothly.

[0019] The end surface of the piston is provided with a gap at the position of the vent hole and the loop air hole to prevent the vacuum from failing to smoothly inhale and exhaust air due to close contact between the surfaces.

[0020] A positioning stop is provided at the connection between the connecting seat and the cylinder body to ensure accurate positioning of the cylinder body and the connecting seat.

[0021] The locking nut, the inner hole of the connecting seat, the inner hole of the positioning washer and the inner hole of the cylinder body are coaxial to ensure the centering degree of the installation, and ensure that the oil seal is pressed and installed smoothly and in place without being crushed due to over-pressing.

[0022] The method for using the oil seal installation tool comprises the following steps:

[0023] (1) Select a locating washer with a suitable inner hole according to the axle diameter. The inner hole of the locating washer can smoothly insert the axle and achieve radial positioning;

[0024] (2) Slide the positioning washer onto the axle; put the oil seal onto the axle and place it in the position to be pushed;

[0025] (3) Lift the pressing mechanism so that the cylinder in the pressing mechanism is mounted on the appropriate position of the axle;

[0026] (4) Insert the connection seat in the connection mechanism (with the locking nut installed) into the axle so that the positioning washer is in the positioning washer groove of the connection seat; rotate the locking nut and the end of the axle (with threads) to achieve threaded connection, and drive the connection seat and the cylinder body to move closer, so as to connect the connection seat and the cylinder body together;

[0027] (5) High-pressure gas is filled into the annular inner cavity of the cylinder through the propulsion hole, pushing the piston forward, and the oil seal is fixed on the axle through the top plate to keep the pressure in place. The gas in the annular inner cavity is discharged through the return hole.

[0028] After installation, high-pressure gas is filled into the annular inner cavity of the cylinder body through the loop air hole, pushing the piston backward to retract the top plate, and the gas in the annular inner cavity is discharged through the propulsion air hole; the connecting seat is separated from the cylinder body, the locking nut is reversed to disconnect it from the end of the axle, and the connecting mechanism (connecting seat) and the cylinder body (top pressure mechanism) are removed from the axle.

[0029] The present invention uses high-pressure gas to enable the oil seal skeleton to be pressed and installed smoothly and quickly in place. The piston feed amount is controlled by controlling the amount of high-pressure gas charged, thereby controlling the pressing depth of the oil seal. During the pressing process, the pressing depth of the oil seal skeleton can be controlled in real time, and the centering degree of the installation can be guaranteed, so that the oil seal can be smoothly pressed into the specified position along the shaft; it can ensure that the oil seal is pressed and installed smoothly and will not be crushed due to over-pressing; it can meet the oil seal installation requirements of different axles, has a simple structure, is easy to operate, and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a cross-sectional view of the internal structure of the axle oil seal installation tool of the present invention.

[0031] Figure 2 It is a schematic diagram of the three-dimensional appearance of the axle oil seal installation tool of the present invention.

[0032] In the figure: 1. handle rocker, 2. locking mechanism, 3. connecting mechanism, 4. pressing mechanism, 5. positioning washer, 6. axle, 7. oil seal;

[0033] 11. Handle, 12. Connecting plate;

[0034] 21. Locking nut, 22. Thrust ball bearing, 23. Nut pressure plate;

[0035] 31. Connecting seat, 32. Quick-insert pipe joint, 33. Push air hole, 34. Loop air hole;

[0036] 41. Cylinder body, 42. Vent hole, 43. Sealing gasket, 44. End cover, 45. Seal, 46. Lifting ear; 47. Piston, 48. Seal, 49. Guide belt, 410. Exhaust hole, 411. Moving space, 412. Top plate, 413. Positioning stop. DETAILED DESCRIPTION

[0037] according to Figure 1 and Figure 2 As shown, the oil seal installation tool of the present invention includes a locking mechanism 2, a connecting mechanism 3 and a pressing mechanism 4. The locking mechanism 2 and the pressing mechanism 4 are respectively connected to the two sides of the connecting mechanism 3. The connecting mechanism 3 is provided with a positioning mechanism. The positioning mechanism adopts a positioning washer 5 for radial positioning of the axle 6. The connecting mechanism 3 is used to load the axle 6 and realize radial positioning. The locking mechanism 2 is used to fix the axle 6. The pressing mechanism 4 adopts a cylinder mechanism to push the oil seal 7 to be installed on the axle 6.

[0038] See also Figure 1 The locking mechanism 2 includes a locking nut 21, a bearing 22 and a pressure plate 23. Both ends of the locking nut 21 are provided with steps. A pressure plate 23 is provided at the outer step, and a bearing 22 is installed at the inner step. The bearing 22 is a thrust ball bearing. The locking nut 21 is installed in the inner hole of the connecting seat 31 in the connecting mechanism 3 through the bearing 22. The pressure plate 23 is connected to the outer end of the connecting seat 31 by screws, and the locking nut 21 and the bearing 22 are axially positioned so that the locking nut 21 can only rotate in the connecting seat 31 but cannot move axially. A handle rocker 1 is provided on the locking nut 21 to facilitate the rotation of the locking nut 21 to achieve the locking of the axle 6.

[0039] See also Figure 1 and Figure 2 The handle rocker 1 includes a handle 11 and a connecting plate 12. The handle 11 is connected to the outer end of the connecting plate 12 through a nut. The connecting plate 12 is fixedly connected to the locking nut 21 in the locking mechanism 2 through a hexagon socket screw, so that the handle 11, the connecting plate 12 and the locking nut 21 are integrated. Rotating the handle 11 can drive the connecting plate 12 and the locking nut 21 to rotate together.

[0040] See also Figure 1 The connecting mechanism 3 includes a connecting seat 31 and a pipe joint 32. The interior of the connecting seat 31 is processed with a propulsion air hole 33 and a circuit air hole 34. The connecting seat 31 is connected to the cylinder body 41 in the top pressing mechanism 4 through a hexagon socket screw. The outer end joints of the propulsion air hole 33 and the circuit air hole 34 are installed with a pipe joint 32. The pipe joint 32 is a quick-insert pipe joint, which is connected to an external gas source through a pipeline. After installation, high-pressure gas pushes the piston 47 to move through the propulsion air hole 33 or the circuit air hole 34.

[0041] The end surface of the connecting seat 31 opposite to the cylinder body 41 is provided with a washer installation groove, in which a positioning washer 5 is installed, and radial positioning of axles with different shaft diameters can be achieved by replacing washers 8 with different inner diameters.

[0042] See also Figure 1 The top pressure mechanism 4 adopts a cylinder, including a cylinder body 41 and a piston 47. The cylinder body 41 is connected to one end of the connecting seat 31 by screws, and a lifting ear 46 is provided on the cylinder body 41 for easy lifting. An annular inner cavity is provided between the inner wall and the outer wall of the cylinder body 41, and the piston 47 is placed in the annular inner cavity. The bottom of the annular inner cavity is provided with two vents 42 connected with the propulsion air hole 33 and the circuit air hole 34 respectively. The piston 47 is stepped, with one end large and the other end small. A seal 48 is provided between the large end of the piston 47 and the side wall of the annular inner cavity to ensure that the intake and exhaust parts are independent and leak-proof. An end cover 44 is connected to the open end of the annular inner cavity on the cylinder body 41 by screws, and a sealing gasket 43 is provided between the end cover 44 and the cylinder body 41. The small end of the piston 47 extends out of the end cover 44, and a seal 45 is provided between the end cover 44. One end of the piston 47 extending out of the end cover 44 is connected to a top plate 412 by screws, and the top plate 412 moves synchronously with the piston 47. When the piston 47 moves, the top plate 412 pushes the oil seal 7 to a suitable position. The seal 45 and the sealing gasket 43 ensure that the high-pressure gas does not leak. A guide belt 49 is provided between the piston 47 and the side wall of the annular inner cavity so that the piston 47 can move smoothly under the thrust of the gas. The space between the small end of the piston 47 and the end cover 44 is the moving space 411 of the piston 47. The piston 47 is processed with an exhaust hole 410. The two ends of the exhaust hole 410 are respectively connected to the moving space 411 and the circuit air hole 34 so that the high-pressure gas can be discharged smoothly. The end face of the piston 47 is provided with a gap at the position of the vent hole 42 and the circuit air hole 34 to prevent the vacuum from being unable to smoothly enter and exhaust air due to close contact between the faces.

[0043] A positioning stop 413 is provided at the connection between the connecting seat 31 and the cylinder body 41 to ensure that the cylinder body 41 and the connecting seat 31 are accurately positioned.

[0044] The inner hole of the cylinder body 41, the locking nut 2, the inner hole of the connecting seat 31, and the positioning washer 5 are coaxial, which can ensure the centering degree of the installation and enable the oil seal 7 to be smoothly pressed into the specified position along the axle 6, which can ensure that the oil seal 7 is pressed and installed smoothly and will not be crushed due to over-pressing.

[0045] The method for using the oil seal installation tool comprises the following steps:

[0046] 1. Assembly of tooling

[0047] (1) Assembly of the pressing mechanism

[0048] A. Install a seal 48 and a guide belt 49 on the outer surface of the piston 47, and insert the piston 47 into the annular inner cavity of the cylinder 41;

[0049] B. Install the seal 45 in the inner hole of the end cover 44, connect the end cover 44 to the cylinder body 41 through the hexagon socket screws, and place the sealing gasket 43 at the connection to ensure that the piston 47 can be extended and retracted smoothly and the gas does not leak;

[0050] C. Connect the top plate 6 to the front end of the piston 47 through the hexagon socket screw to ensure that the piston 47 can be pushed synchronously;

[0051] D. Install the lifting lug 46 on the cylinder body 41 to facilitate lifting;

[0052] (2) Assembly of locking mechanism and connecting mechanism

[0053] A. Insert the bearing 22 into the outer surface of the locking nut 21, install the locking nut 21 and the bearing 22 together into the bearing hole of the connecting seat 31, connect the pressing plate 23 to the end surface of the connecting seat 31 through the hexagon socket screw, and axially position the locking nut 21 and the bearing 22;

[0054] B. Install the connecting plate 12 on the outer end surface of the locking nut 21 through the hexagon socket screw, and install the handle 11 on the outer end of the connecting plate 12.

[0055] C. Install a pipe joint 32 at the joint of the propulsion air hole 33 and the loop air hole 34 of the connection seat 31 to facilitate the access of high-pressure gas.

[0056] 2. Install the oil seal 7

[0057] A. Place the oil seal 7 at the position to be pushed on the axle 6, and hoist the assembled pressing mechanism to a proper position on the axle 6 through the lifting lug 46;

[0058] B. Select a suitable positioning washer 5 according to the diameter of the axle 6, and insert the positioning washer 5 into the axle 6;

[0059] C. Insert the connection seat 31 in the assembled connection mechanism into the axle 6, so that the positioning washer 5 is in the positioning washer groove at the end of the connection seat 31; drive the locking nut 21 to rotate through the handle 11, so that the locking nut 21 and the end of the axle 6 (with threads) are threadedly connected, and at the same time, the connection seat 31 is moved closer to the cylinder body 41, and finally the connection seat 31 and the cylinder body 41 are tightly docked together, and the connection seat 31 and the cylinder body 41 are connected together through the hexagon socket screw. At this time, the propulsion air hole 33 is docked with a vent hole 42, and the circuit air hole 34 is docked with the exhaust hole 410 through another vent hole. In this way, the axial fixation of the axle 6 is achieved through the threaded connection between the locking nut 21 and the front end of the axle 6, and the connection of the air path is achieved.

[0060] D. High-pressure gas is charged into the annular inner cavity of the cylinder body 41 through the pipe joint 32 and the propulsion air hole 33, pushing the piston 47 forward, and the gas in the annular inner cavity is discharged through the return air hole 34, and the oil seal 7 is fixedly pressed in place on the axle 6 through the top plate 6. By controlling the amount of high-pressure gas charged to control the feed amount of the piston 47, and then controlling the pressing depth of the oil seal 7, the installation requirements of the oil seal 7 on different types of axles can be met.

[0061] After installation is completed, the reverse operation is performed. High-pressure gas is filled into the annular inner cavity of the cylinder body 41 through the loop air hole 34, pushing the piston 41 to move backward, causing the top plate 6 to retract, and the gas in the annular inner cavity is discharged through the propulsion air hole 33; the connecting seat 31 is separated from the cylinder body 41, and the locking nut 21 is reversed to disconnect it from the end of the axle 6, and the connecting seat 31 and the cylinder body 41 are removed from the axle 6.

Claims

1. An axle oil seal installation tool, characterized in that: It includes a locking mechanism, a connecting mechanism and a pressing mechanism, wherein the locking mechanism and the pressing mechanism are respectively connected to two sides of the connecting mechanism, and a positioning mechanism is arranged in the connecting mechanism; The locking mechanism is a locking nut; The connecting mechanism comprises a connecting seat, the interior of which is provided with a propulsion air hole and a circuit air hole, and the connecting seat is connected to the cylinder body in the pressing mechanism; The positioning mechanism is a positioning washer; The pressing mechanism comprises a cylinder body and a piston. The cylinder body is connected to one end of a connecting seat in the connecting mechanism. An annular inner cavity is arranged in the cylinder body. The piston is placed in the annular inner cavity. A vent hole and an exhaust hole which are respectively connected to the propulsion air hole and the loop air hole are arranged on the bottom surface of the annular inner cavity. An end cover is connected to the open end of the annular inner cavity on the cylinder body. The piston extends out of the end cover, and the extended end is connected to a top plate.

2. The axle oil seal installation tool according to claim 1 is characterized in that: The locking nut is installed in a connecting seat in the connecting mechanism through a bearing.

3. The axle oil seal installation tool according to claim 1 is characterized in that: The locking nut is provided with a handle rocking plate, which comprises a handle and a connecting plate. The handle is connected to the outer end of the connecting plate, and the connecting plate is fixedly connected to the locking nut.

4. The axle oil seal installation tool according to claim 1 is characterized in that: A washer installation groove for installing a positioning washer is arranged in the inner hole of the connecting seat, and the washer installation groove is arranged on the end surface of the connecting seat connected to the cylinder body.

5. The axle oil seal installation tool according to claim 1 is characterized in that: Seals are arranged between the piston and the side wall of the annular inner cavity and between the piston and the end cover, and a sealing gasket is arranged between the end cover and the cylinder body.

6. The axle oil seal installation tool according to claim 1 is characterized in that: A guide belt is arranged between the piston and the side wall of the annular inner cavity.

7. The axle oil seal installation tool according to claim 1 is characterized in that: A moving space is provided between the piston and the end cover, an exhaust hole is processed in the piston, and both ends of the exhaust hole are connected with the moving space and the circuit air hole respectively; a gap is reserved at the end surface of the piston at the position of the vent hole and the circuit air hole.

8. The axle oil seal installation tool according to claim 1 is characterized in that: A positioning stop is provided at the connection between the connecting seat and the cylinder body.

9. The axle oil seal installation tool according to claim 1, characterized in that: The locking nut, the inner hole of the connecting seat, the inner hole of the positioning washer and the inner hole of the cylinder body are coaxial.

10. A method for using the axle oil seal installation tool as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: (1) Select a locating washer with a suitable inner hole according to the axle diameter. The inner hole of the locating washer can smoothly insert the axle and achieve radial positioning; (2) Slide the positioning washer onto the axle; put the oil seal onto the axle and place it in the position to be pushed; (3) Lift the top pressing mechanism and fit the cylinder body onto the appropriate position of the axle; (4) Insert the connection seat in the connection mechanism into the axle so that the positioning washer is in the positioning washer groove of the connection seat; turn the locking nut to achieve threaded connection with the end of the axle, and drive the connection seat and the cylinder body to move closer, so as to connect the connection seat and the cylinder body together; (5) High-pressure gas is filled into the annular inner cavity of the cylinder through the propulsion air hole, pushing the piston forward, and the oil seal is fixed on the axle through the top plate to keep the pressure in place. The gas in the annular inner cavity is discharged through the return air hole.

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