A Torsen differential running-in cleaning method

Abstract

The present invention provides a Torsen differential running-in and cleaning method, which belongs to the field of differential processing technology. The differential housing is first positioned on the bottom plate of the upper oil tank through tooling installation, and then all the left-handed planetary gears and left-handed sun gear are installed. The servo motor is started to rotate the drive shaft, thereby driving the left-handed sun gear and all the left-handed planetary gears to rotate. The oil guide strip in the oil delivery cylinder transports and lifts the cleaning oil in the lower oil tank; before the cleaning oil level in the lower oil tank leaves the bottom of the oil delivery cylinder, the servo motor is controlled to reverse, and the cleaning oil cleans the left-handed sun gear and left-handed planetary gears in the opposite direction; after multiple reversing operations, the cleaning and running-in of the left-handed sun gear and left-handed planetary gears are completed, the drive shaft is moved upward, the left-handed planetary gear and left-handed sun gear are removed, and the right-handed sun gear and right-handed planetary gear are replaced at the installation position. The above operations are continued to complete the cleaning and running-in of the differential assembly. The present invention has the advantages of high efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of differential processing and relates to a running-in and cleaning method for a Torsen-type differential. Background Art

[0002] The Torsen differential assembly includes a housing, a left end cover, a right end cover, a plurality of left-handed planetary gears, a plurality of right-handed sun gears, a left-handed sun gear, and a right-handed planetary gear. The housing is provided with mounting holes for the left-handed planetary gears and the right-handed planetary gears. Figure 2 As shown, the left-hand sun gear meshes with all the left-hand planet gears at the same time, and the right-hand sun gear meshes with all the right-hand planet gears. The through holes of the left-hand sun gear and the right-hand sun gear are penetrated by the corresponding two transmission shafts through the internal splines. When the car is traveling in a straight line, the left-hand planet gear and the right-hand planet gear do not rotate on their own, but only revolve around the center of the corresponding left-hand sun gear and the right-hand sun gear. When the car turns, a speed difference is generated. For example, the right-end wheel drives the right-hand sun gear to rotate, and the right-hand sun gear drives the left-hand planet gear at the same end to rotate, and the left-hand planet gear then drives the right-hand planet gear at the other end to rotate, and the right-hand planet gear then drives the left-hand sun gear to rotate, thereby achieving a speed difference.

[0003] During differential machining, machining fluid, kerosene, metal shavings, and other particles adhere to the surfaces of the components after they are machined. Furthermore, the left-handed planetary gears, right-handed sun gear, and left-handed sun gear, as well as the right-handed planetary gears, require a run-in process after machining. This run-in not only tests the transmission components (by simulating their mechanical properties), but also ensures that the surface condition and mechanical and physical properties of the transmission components are suitable for long-term operation. Existing practices typically involve installing the entire differential assembly on a testing machine, simulating full differential operation. This approach requires disassembly after testing for manufacturers who only supply parts. Even for manufacturers who sell the assembly, disassembly and inspection are still required. Furthermore, cleaning the kerosene and metal shavings adhering to the components during the run-in process is not possible, nor is cleaning the new metal shavings generated during the run-in process. Summary of the Invention

[0004] The purpose of the present invention is to provide a Torsen differential running-in cleaning method in response to the above-mentioned problems existing in the existing technology. The technical problem to be solved by the present invention is how to complete the cleaning of the differential during the running-in process.

[0005] The objectives of the present invention can be achieved through the following technical solutions: A Torsen differential running-in cleaning method, characterized in that it includes an upper oil tank, a first mounting bracket and a second mounting bracket, the first mounting bracket and the second mounting bracket are both fixed on the upper oil tank, and the first mounting bracket is located above the second mounting bracket; the running-in cleaning equipment also includes a hydraulic cylinder and a servo motor, the cylinder body of the hydraulic cylinder is fixed and the body of the servo motor is respectively fixed to the upper and lower side surfaces of the first mounting bracket, a drive shaft is rotatably connected to the push rod of the hydraulic cylinder through a bearing, a turntable is rotatably connected to the second mounting bracket through a bearing, the turntable has an internal spline, the drive shaft has an external spline that cooperates with the internal spline, and the turntable is driven by the servo motor;

[0006] The bottom plate of the upper oil tank is provided with a tool for fixing the differential housing, and the external splines on the drive shaft can cooperate with the internal splines of the center hole of the sun gear of the differential.

[0007] Furthermore, the tooling includes a plurality of positioning pins fixed on the bottom plate of the upper oil tank, and each positioning pin can be simultaneously inserted into the flange hole of the differential housing.

[0008] Furthermore, the running-in cleaning equipment also includes a lower oil tank, the upper oil tank is arranged above the lower oil tank, and an oil cylinder is rotatably connected to the bottom plate of the upper oil tank. The upper end of the oil cylinder has a plug, and the drive shaft and the plug can be respectively inserted into the center hole of the sun gear of the same differential, and the plug is splined with the center hole of the sun gear of the differential; the oil cylinder has a spiral guide strip, and the middle part of the oil cylinder has an oil hole connecting the inner cavity of the oil cylinder and the inner cavity of the differential housing.

[0009] Furthermore, the upper oil tank is detachably connected to the lower oil tank.

[0010] Furthermore, the drive shaft has a boss, and after the drive shaft is inserted into the sun gear of the differential, the boss can abut against the end face of the sun gear of the differential.

[0011] The function of the boss is to press the driver against the sun gear of the differential, and to maintain the compression and positioning of the differential case when the locating pin is not bolted.

[0012] The left end cover and end cover of the Torsen differential assembly are not used as parts for running-in cleaning, or the left end cover and the right end cover are cleaned separately, because they themselves do not belong to the transmission parts and are relatively flat. Except for the left end cover and the right end cover, the other parts of the differential assembly are divided into three parts, the differential housing is one, all the left-handed planetary gears and the left-handed sun gear are the second, and all the right-handed planetary gears and the right-handed sun gear are the third. During the running-in cleaning, the differential housing is first positioned by tooling installation, and then all the left-handed planetary gears and the left-handed sun gear are installed, and all the right-handed planetary gears and the right-handed sun gear are put aside first, that is, the right-handed planetary gears and the right-handed sun gear are not installed in the differential housing, so that a cavity is formed in the differential housing, and the cavity passes through The oil hole is connected to the inner cavity of the oil delivery cylinder. When installing the left-hand sun gear, the left-hand sun gear and the plug are assembled. After the installation is completed, the hydraulic cylinder controls the drive shaft to move downward until the drive shaft cooperates with the center hole of the left-hand sun gear. Then the servo motor is started to rotate the drive shaft, thereby driving the left-hand sun gear and all the left-hand planetary gears to rotate. The oil guide strip in the oil delivery cylinder transports and lifts the cleaning oil in the lower oil tank into the differential housing, and then passes through the differential housing into the gap between the left-hand sun gear and the left-hand planetary gear and the housing, and also into the meshing gap between the left-hand sun gear and the left-hand planetary gear. The process of transporting the cleaning oil with a certain pressure from bottom to top is the cleaning process, that is, completing the running-in and cleaning of the left-hand planetary gear and the left-hand sun gear. During operation, the cleaning oil in the lower oil tank decreases and the cleaning oil in the upper oil tank increases. Before the cleaning oil level in the lower oil tank leaves the bottom of the oil cylinder, the servo motor is controlled to reverse, and the running path of the cleaning oil is reversed. The cleaning oil cleans the left-handed sun gear and the left-handed planetary gear in the reverse direction. After multiple reversing operations, the cleaning and running-in of the left-handed sun gear and the left-handed planetary gear are completed. Subsequently, the drive shaft is moved upward, the left-handed planetary gear and the left-handed sun gear are taken out, and the right-handed sun gear and the right-handed planetary gear are replaced at the installation position. The above operation is continued to complete the cleaning and running-in of all parts of the differential assembly except the left end cover and the right end cover.

[0013] Since this method is not fully assembled, the servo motor has a low speed for the purpose of cleaning and running-in, and does not simulate the operating speed of the differential.

[0014] Since the left-hand planetary gear and the right-hand planetary gear are components of the same specifications, and the left-hand sun gear and the right-hand sun gear are also components of the same specifications, the above-mentioned method can be used to run-in and clean them separately, thereby eliminating the need to disassemble and assemble the differential housing. This method not only achieves the cleaning and running-in of each component, but also facilitates the inspection of the components. It is suitable for the sale of complete differentials and spare parts, saving manpower and material resources, improving efficiency, and optimizing the effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the running-in cleaning equipment.

[0016] Figure 2 It is a structural schematic diagram of the Torsen differential involved.

[0017] Figure 3 It is a structural diagram during the running-in and cleaning of the left-hand planetary gear and the left-hand sun gear.

[0018] In the figure, 1. upper oil tank; 2. first mounting bracket; 3. second mounting bracket; 4. hydraulic cylinder; 5. servo motor; 6. drive shaft; 7. turntable; 8. positioning pin; 9. oil cylinder; 10. plug; 11. guide bar; 12. oil hole; 13. lower oil tank; 14. boss; a. housing; b. left end cover; c. right end cover; d. left-handed sun gear; e. right-handed sun gear; f. left-handed planetary gear; g. right-handed planetary gear. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0020] Example 1:

[0021] The oil is cleaned by utilizing the guiding effect of the helical teeth of the left-hand planetary gear f and the left-hand sun gear d, without the need for the lower oil tank 13.

[0022] like Figure 1 As shown, a certain amount of cleaning oil is loaded into the upper oil tank 1, with the liquid level exceeding the top of the differential case a. The differential case a is positioned by the locating pin 8, and bolts can be installed to prevent the differential case a from loosening. Then, the left-handed sun gear d and the left-handed planetary gear f are installed. Subsequently, the drive shaft 6 is controlled to move downward so that it is inserted into the center hole of the left-handed sun gear d. Finally, the servo motor 5 is started. After the left-handed sun gear d and the left-handed planetary gear f are cleaned, the left-handed planetary gear f is replaced with the right-handed planetary gear g, and the left-handed sun gear d is replaced with the right-handed sun gear e. In this way, the running-in and cleaning of all components of the differential case a except the left end cover b and the right end cover are completed.

[0023] The defects of this method are: the helical teeth are effective in guiding the cleaning oil, but the oil flow efficiency is low. In addition, the inner cavity of the differential housing a is not directly connected to the upper oil tank 1, and the oil flow path and oil flow cross-section are limited. The cleaning efficiency and cleaning effect are limited, it takes a long time, and there are blind spots for cleaning.

[0024] Example 2

[0025] A lower oil tank 13 is provided below the upper oil tank 1 , and the upper oil tank 1 and the lower oil tank 13 are connected by an oil delivery cylinder 9 .

[0026] like Figure 1 and Figure 3As shown, the left end cover b and the end cover of the Torsen differential assembly are not used as the parts for running-in and cleaning, or the left end cover b and the right end cover are cleaned separately, because they themselves do not belong to the transmission parts and are relatively flat. Except for the left end cover b and the right end cover, the other parts of the differential assembly are divided into three parts, the differential housing a is one, all the left-handed planetary gears f and the left-handed sun gear d are the second, and all the right-handed planetary gears g and the right-handed sun gear e are the third. During the running-in and cleaning, the differential housing a is first positioned by tooling installation, and then all the left-handed planetary gears f and the left-handed sun gear d are installed, and all the right-handed planetary gears g and the right-handed sun gear e are put aside first, that is, the right-handed planetary gears g and the right-handed sun gear e are not installed in the differential housing a, so that a cavity is formed in the differential housing a, and the cavity is cleared by the passage. The oil hole 12 is connected to the inner cavity of the oil delivery cylinder 9. When the left-handed sun gear d is installed, the left-handed sun gear d and the plug are assembled. After the installation is completed, the hydraulic cylinder 4 controls the drive shaft 6 to move downward until the drive shaft 6 is matched with the center hole of the left-handed sun gear d. Then the servo motor 5 is started to rotate the drive shaft 6, thereby driving the left-handed sun gear d and all the left-handed planetary gears f to rotate. The oil guide strip in the oil delivery cylinder 9 transports and lifts the cleaning oil in the lower oil tank 13 into the differential housing a, and then passes through the differential housing a into the gap between the left-handed sun gear d and the left-handed planetary gear f and the housing a, and also into the meshing gap between the left-handed sun gear d and the left-handed planetary gear f. The process of transporting the cleaning oil with a certain pressure from bottom to top is the cleaning process, that is, completing the running-in and cleaning of the left-handed planetary gear f and the left-handed sun gear d. During operation, the cleaning oil in the lower oil tank 13 decreases and the cleaning oil in the upper oil tank 1 increases. Before the cleaning oil level in the lower oil tank 13 leaves the bottom of the oil delivery cylinder 9, the servo motor 5 is controlled to reverse, and the running path of the cleaning oil is reversed. The cleaning oil cleans the left-handed sun gear d and the left-handed planetary gear f in reverse. After multiple reversing operations, the cleaning and running-in of the left-handed sun gear d and the left-handed planetary gear f are completed. Subsequently, the drive shaft 6 is moved upward, the left-handed planetary gear f and the left-handed sun gear d are taken out, and the right-handed sun gear e and the right-handed planetary gear g are replaced at the installation position. The above operation is continued to complete the cleaning and running-in of all parts of the differential assembly except the left end cover b and the right end cover.

[0027] Since the left-hand planetary gear f and the right-hand planetary gear g are components of the same specifications, and the left-hand sun gear d and the right-hand sun gear e are also components of the same specifications, the above-mentioned method can be used to run-in and clean them separately, thereby eliminating the need to disassemble and assemble the differential housing a. This method not only achieves the cleaning and running-in of each component, but also facilitates the inspection of the components. It is suitable for the sale of complete differentials and parts, saving manpower and material resources, improving efficiency, and optimizing the effect.

[0028] In this way, the path of the cleaning oil is smooth, and the oil pressure of the cleaning oil increases with the increase of the running-in speed, forming a high-speed and high-pressure state at the mating pair. Not only is the cleaning efficient and the dirt and metal chips removed thoroughly, but it can also effectively avoid the damage of the mating pair to the metal chips during the running-in process, and the chips that may damage the mating pair can be removed in time.

[0029] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A Torsen differential running-in cleaning method, characterized in that: The applicable running-in cleaning equipment comprises an upper oil tank (1), a first mounting support plate (2) and a second mounting support plate (3), wherein the first mounting support plate (2) and the second mounting support plate (3) are both fixed on the upper oil tank (1), and the first mounting support plate (2) is located above the second mounting support plate (3); the running-in cleaning equipment also comprises a hydraulic cylinder (4) and a servo motor (5), wherein the cylinder body of the hydraulic cylinder (4) and the body of the servo motor (5) are respectively fixed on the upper and lower side surfaces of the first mounting support plate (2), a driving shaft (6) is rotatably connected to the push rod of the hydraulic cylinder (4) through a bearing, and a turntable (7) is rotatably connected to the second mounting support plate (3) through a bearing, wherein the turntable (7) has an internal spline, and the driving shaft (6) has an external spline that matches the internal spline, and the turntable (7) is driven by the servo motor (5); The bottom plate of the upper oil tank (1) is provided with a tool for fixing the differential housing (a), and the external spline on the drive shaft (6) can cooperate with the internal spline of the center hole of the sun gear of the differential; The running-in cleaning device also includes a lower oil tank (13), the upper oil tank (1) is arranged above the lower oil tank (13), an oil delivery cylinder (9) is rotatably connected to the bottom plate of the upper oil tank (1), the upper end of the oil delivery cylinder (9) has a plug, the drive shaft (6) and the plug can be respectively inserted into the center hole of the sun gear of the same differential, and the plug is spline-matched with the center hole of the sun gear of the differential; the oil delivery cylinder (9) has a spiral guide strip (11) in it, and the middle part of the oil delivery cylinder (9) has an oil through hole (12) connecting the inner cavity of the oil delivery cylinder (9) and the inner cavity of the housing (a) of the differential; The running-in cleaning method comprises the following steps: 1) Position the differential housing (a) on the bottom plate of the upper oil tank through tooling, then install all the left-handed planetary gears (f) and the left-handed sun gear (d) to form a cavity in the differential housing (a), and complete the assembly of the left-handed sun gear (d) and the plug; 2) After the installation is completed, the hydraulic cylinder (4) controls the drive shaft (6) to move downward until the drive shaft (6) is matched with the center hole of the left-handed sun gear (d), and then starts the servo motor (5) to rotate the drive shaft (6), thereby driving the left-handed sun gear (d) and all the left-handed planetary gears (f) to rotate, and the oil guide strip in the oil delivery barrel (9) transports and lifts the cleaning oil in the lower oil tank (13); 3) ), before the cleaning oil level in the lower oil tank (13) leaves the bottom of the oil delivery cylinder (9), the servo motor (5) is controlled to reverse, the running path of the cleaning oil is reversed, and the cleaning oil is used to clean the left-handed sun gear (d) and the left-handed planetary gear (f) in the reverse direction; 4), after multiple reversing operations, the cleaning and running-in of the left-handed sun gear (d) and the left-handed planetary gear (f) are completed, the drive shaft (6) is moved upward, the left-handed planetary gear (f) and the left-handed sun gear (d) are taken out, and the right-handed sun gear (e) and the right-handed planetary gear (g) are replaced at the installation position, and the above steps are continued to complete the cleaning and running-in of all parts of the differential assembly except the left end cover (b) and the right end cover (c).

2. A Torsen differential running-in cleaning method according to claim 1, characterized in that: The tooling comprises a plurality of positioning pins (8) fixed on the bottom plate of the upper oil tank (1), and each positioning pin (8) can be simultaneously inserted into a flange hole of the differential housing (a).

3. A Torsen differential running-in cleaning method according to claim 2, characterized in that: The upper oil tank (1) is detachably connected to the lower oil tank (13).

4. A Torsen differential running-in cleaning method according to claim 2, characterized in that: The drive shaft (6) is provided with a boss (14), and after the drive shaft (6) is inserted into the sun gear of the differential, the boss (14) can abut against the end face of the sun gear of the differential.

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