Differential planetary gear shaft alignment guide press fitting mechanism and equipment

Abstract

The embodiment of the application provides a differential planetary gear shaft alignment guide press fitting mechanism and equipment, and belongs to the technical field of automobile parts assembly. The press fitting mechanism comprises: a stud shaft dummy shaft, which is used for being previously penetrated into an assembled component of a differential housing, a planetary gear, a planetary gear shaft and a gear gasket, so as to limit the relative positions of the differential housing, the planetary gear, the planetary gear shaft and the gear gasket; and a stud shaft transition dummy shaft, which is arranged at the bottom of the stud shaft dummy shaft and is used for being upwardly ejected to eject the stud shaft dummy shaft from the assembled component, wherein the top edge of the stud shaft transition dummy shaft is provided with an inclined surface, so that when the stud shaft transition dummy shaft is upwardly ejected, the assembled component can be driven to translate by the inclined surface, so as to complete the position correction of the assembled component. The press fitting mechanism and the equipment can improve the assembly efficiency of the differential.

Description

Technical Field

[0001] This invention relates to the field of automotive parts assembly technology, and more specifically to a differential planetary gear shaft alignment guide press-fitting mechanism and equipment. Background Technology

[0002] A differential is a component of a car, a mechanism used to drive the left and right (or front and rear) drive wheels at different speeds. A common differential mainly consists of left and right half-shaft gears, two planetary gears, and a gear carrier. When a car is turning or driving on uneven surfaces, the differential allows the left and right wheels to roll at different speeds, ensuring that the drive wheels on both sides perform pure rolling motion. The differential is designed to adjust the speed difference between the left and right wheels. In four-wheel drive, all four wheels must be connected to drive them. If the four wheels are mechanically connected, the car will not rotate at the same speed when driving on curves. To ensure that the rotational speed is approximately consistent when the car is driving on curves, a center differential is needed to adjust the speed difference between the front and rear wheels.

[0003] The assembly of the planetary gear shaft is crucial during differential assembly. If the hole on the differential housing that mates with the slotted shaft is not precisely positioned and is not aligned with the axis of the slotted shaft press head, it will cause difficulties in pressing the slotted shaft and make it hard to guarantee the success rate of the pressing. Summary of the Invention

[0004] The purpose of this invention is to provide a differential planetary gear shaft alignment guide press-fitting mechanism and equipment, which can improve the assembly efficiency of the differential.

[0005] To achieve the above objectives, embodiments of the present invention provide a differential planetary gear shaft alignment guide press-fitting mechanism, comprising: A single-axis dummy shaft is used to pre-insert into the assembly of the differential housing, planetary gears, planetary gear shafts, and gear washers to limit the relative positions of the differential housing, planetary gears, planetary gear shafts, and gear washers. A transverse transition dummy shaft is provided at the bottom of the transverse transition dummy shaft and is used to push the transverse transition dummy shaft upward to push the transverse transition dummy shaft out of the assembly assembly. The top edge of the transverse transition dummy shaft is provided with a slope so that when the transverse transition dummy shaft is pushed upward, the assembly assembly can be driven to translate by the slope to complete the position correction of the assembly assembly.

[0006] Optionally, the pressing mechanism further includes a differential mounting seat, disposed around the periphery of the dummy shaft, for limiting the assembly component so that the posture of the assembly component remains unchanged.

[0007] Optionally, there are two differential mounts, each having a V-shaped groove, and the two long ends of the assembly are respectively placed in the V-shaped groove.

[0008] Optionally, the pressing mechanism further includes an ejection assembly disposed at the bottom of the transverse transition dummy shaft, for ejecting upward to drive the transverse transition dummy shaft to eject upward.

[0009] Optionally, a sensing block is provided on the side wall of the ejection assembly, which moves as the ejection assembly moves. The pressing mechanism also includes at least one position proximity switch, which is disposed on the moving path of the sensing block, and is used to trigger a signal indicating the working status of the ejection component when the sensing block moves to a preset position.

[0010] Optionally, there are at least two position proximity switches, which are used to trigger signals indicating that the ejector assembly is in the working position and the home position, respectively.

[0011] Optionally, the ejection assembly includes a linear bearing housing, a linear bearing, and a cylinder. The linear bearing contacts the transom transition dummy shaft. The linear bearing housing is disposed around the linear bearing to limit the linear bearing. The cylinder is disposed at the end of the linear bearing away from the transom transition dummy shaft and is used to drive the linear bearing to eject upward.

[0012] Optionally, a base platform is included for limiting the dummy shaft and the transition dummy shaft, and the base platform is provided with a through hole so that the transition dummy shaft can pass through.

[0013] On the other hand, the present invention also provides a differential planetary gear shaft alignment guide pressing device, the pressing device including a controller and a pressing mechanism as described above, the controller being used to issue a start signal to drive the slotted shaft transition dummy shaft of the pressing mechanism to be pushed upward.

[0014] Through the above technical solution, the differential planetary gear shaft alignment guide pressing mechanism and equipment provided by the present invention pre-assembles the assembly components of the differential housing, planetary gears, planetary gear shafts, and gear washers by inserting a dummy shaft into the dummy shaft. Combined with the inclined contact structure at the top of the dummy shaft, the vertical position of the assembly components can be corrected during the ejection of the dummy shaft, thereby improving the positioning accuracy of the differential and thus improving the efficiency of differential assembly.

[0015] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a side perspective schematic diagram of a differential planetary gear shaft alignment guide press-fitting mechanism according to an embodiment of the present invention. Figure 2 This is a schematic diagram of a single-axis transition dummy shaft and a single-axis transition shaft according to an embodiment of the present invention; Figure 3 This is a top view of a differential mounting bracket according to an embodiment of the present invention; Figure 4 This is a schematic diagram of an ejection assembly according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures Detailed Implementation

[0018] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0019] like Figure 1 The diagram shown is a side perspective view of a differential planetary gear shaft alignment guide press-fitting mechanism according to an embodiment of the present invention. Figure 1 The pressing mechanism may include a flat-shaft dummy shaft 10 and a flat-shaft transition dummy shaft 11. The flat-shaft dummy shaft 10 can be pre-inserted into the assembly of the differential housing, planetary gears, planetary gear shafts, and gear washers to limit the relative positions of these components. The flat-shaft transition dummy shaft 11 can be located at the bottom of the flat-shaft dummy shaft 10 and is used to push it upwards out of the assembly. The top edge of the flat-shaft transition dummy shaft 11 has a ramp 11a, so that when the flat-shaft transition dummy shaft 11 is pushed upwards, the assembly can be translated by the ramp 11a to complete the position correction of the assembly.

[0020] In this embodiment, the specific form of the inclined surface 11a can be of various forms known to those skilled in the art. However, considering that the alignment of the assembled components needs to be completed at four angles in the horizontal direction during the ejection of the transverse shaft transition dummy shaft 11, in one example of the present invention, the inclined surface 11a can be a ring around the top of the transverse shaft transition dummy shaft 11. Furthermore, considering the reduction of pressure in the bottom cylinder during ejection, the angle between the inclined surface 11a and the horizontal line can be between 45° and 90°, excluding the 90° endpoint. Specifically, the structure of the transverse shaft transition dummy shaft 11 can be as follows: Figure 2 As shown. In addition, in order to facilitate the smooth insertion of the transverse transition dummy shaft 11 into the assembly, in this embodiment, the junction of the inclined surface 11a and the top of the transverse transition dummy shaft 11 can be chamfered.

[0021] During the upward lifting of the dummy shaft 11, the dummy shaft 10 needs to maintain a constant relative posture to complete the position correction. Therefore, in this embodiment, the pressing mechanism may further include a differential mounting base 30, disposed around the dummy shaft 10, for limiting the assembly assembly to ensure that the posture of the assembly assembly remains unchanged. Further, regarding the specific structure of the differential mounting base 30, it can be in various ways known to those skilled in the art, provided that the posture of the assembly assembly remains unchanged. In a preferred example of the present invention, such as... Figure 3 As shown, there can be two differential mounting seats 30, and each differential mounting seat 30 can have a V-shaped groove. The two long ends of the assembly component can be placed in the V-shaped groove respectively. Due to the inclined structure of the V-shaped groove, when the assembly component is placed, due to the resultant force of gravity on the inclined surface, the assembly component can complete the horizontal and vertical displacement while maintaining its posture during the lifting process of the dummy shaft 11.

[0022] In order to push the transverse transition dummy shaft 11 upward, in one embodiment of the present invention, the pressing mechanism may further include an ejection assembly 40. The ejection assembly 40 may be disposed at the bottom of the transverse transition dummy shaft 11, and is used to push it upward to drive the transverse transition dummy shaft 11 upward out of the assembly assembly. Furthermore, considering that the vertical displacement needs to be controlled during the ejection process to ensure that the transverse transition dummy shaft 10 can be smoothly ejected while the transverse transition dummy shaft 11 can be inserted into the assembly assembly, a sensing block 41 may be disposed on the side wall of the ejection assembly 40 in this embodiment. The sensing block 41 can be used to move with the movement state of the ejection assembly. Correspondingly, the pressing mechanism may further include at least one position proximity switch 42. The position proximity switch 42 may be disposed on the movement path of the sensing block 41, and is used to trigger a signal indicating the working state of the ejection assembly when the sensing block 41 moves to a preset position. For example, there can be two proximity switches 42, namely a home position proximity switch 42a and a working position proximity switch 42b. The home position proximity switch 41a can be located below the working position proximity switch 42b. When the ejection assembly 40 is not activated, the sensing block 41 is near the home position proximity switch, thereby triggering a signal indicating that the ejection assembly 40 is in the home position; when the ejection assembly 40 ejects, the sensing block 41 moves to the vicinity of the working position proximity switch 42b, thereby triggering a signal indicating that the ejection assembly 40 is in the working position. Furthermore, the specific structure of the ejection assembly 40 can be of various forms known to those skilled in the art, including but not limited to cylinders, hand-push structures, and motor and gear combination push structures. In one example of the present invention, the ejection assembly 40 can be as follows: Figure 4 As shown. In this Figure 4 The ejection assembly 40 may include a linear bearing housing 43, a linear bearing 44, and a cylinder. The linear bearing 43 may contact the transom transition dummy shaft 11, and the linear bearing housing 44 may be disposed around the linear bearing 43 to limit its movement. The cylinder may be disposed at the end of the linear bearing 44 away from the transom transition dummy shaft 11, for driving the linear bearing 44 to eject upwards. Furthermore, the cylinder may include a cylinder connecting rod 45a, a cylinder connecting block 45b, and a cylinder body 45c. The cylinder connecting rod 45a may contact the linear bearing 44, the cylinder connecting block 45b may be connected to the end of the cylinder connecting rod 45a away from the linear bearing 44, and the cylinder body 45c may be disposed at the bottom of the cylinder connecting block 45b.

[0023] In addition, to facilitate the installation of the overall device, such as Figure 1As shown, the press-fitting mechanism may further include a base platform 50. The base platform 50 can be used to limit the dummy shaft 10 and the transition dummy shaft 11 of the dummy shaft. The base platform 50 may also be provided with a through hole to allow the transition dummy shaft 11 to pass through.

[0024] On the other hand, the present invention also provides a differential planetary gear shaft alignment guide pressing device, the pressing device including a controller and a pressing mechanism as described above, the controller being used to issue a start signal to drive the slotted shaft transition dummy shaft of the pressing mechanism to be pushed upward.

[0025] Through the above technical solution, the differential planetary gear shaft alignment guide pressing mechanism and equipment provided by the present invention pre-assembles the assembly components of the differential housing, planetary gears, planetary gear shafts, and gear washers by pre-inserting a dummy shaft into the dummy shaft. Combined with the inclined surface contact structure between the dummy shaft and the dummy shaft, the vertical position of the assembly components can be corrected during the ejection of the dummy shaft, thereby improving the positioning accuracy of the differential and thus improving the efficiency of differential assembly.

[0026] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0027] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A differential planetary gear shaft alignment guide press-fitting mechanism, characterized in that, The pressing mechanism includes: A single-axis dummy shaft is used to pre-insert into the assembly of the differential housing, planetary gears, planetary gear shafts, and gear washers to limit the relative positions of the differential housing, planetary gears, planetary gear shafts, and gear washers before the actual planetary gear shaft is pressed in. A transverse transition dummy shaft is coaxially disposed at the bottom of the transverse transition dummy shaft and is used to push upward to push the transverse transition dummy shaft out of the assembly assembly. The top edge of the transverse transition dummy shaft is provided with a slope. The transverse transition dummy shaft is configured such that, during the process of the transverse transition dummy shaft being pushed out upwards, its inclined surface contacts the assembly component, simultaneously driving the assembly component to translate in the horizontal plane, so as to simultaneously complete the position correction of the assembly component during the pushing-out action. The pressing mechanism also includes an ejection component, which is disposed at the bottom of the transverse transition dummy shaft and is used to eject upward to drive the transverse transition dummy shaft to eject upward. The inclined plane is a ring around the top of the transition pseudo-axis of the straight axis.

2. The pressing mechanism according to claim 1, characterized in that, The press-fitting mechanism also includes a differential mounting seat, which is located around the dummy shaft and is used to limit the assembly component so that the posture of the assembly component remains unchanged.

3. The pressing mechanism according to claim 2, characterized in that, There are two differential mounts, each with a V-shaped groove, and the two long ends of the assembly are respectively placed in the V-shaped groove.

4. The pressing mechanism according to claim 1, characterized in that, A sensing block is provided on the side wall of the ejection assembly, which moves according to the movement state of the ejection assembly; The pressing mechanism also includes at least one position proximity switch, which is disposed on the moving path of the sensing block, and is used to trigger a signal indicating the working status of the ejection component when the sensing block moves to a preset position.

5. The pressing mechanism according to claim 4, characterized in that, There are at least two position proximity switches, which are used to trigger signals indicating that the ejection component is in the working position and the home position, respectively.

6. The pressing mechanism according to claim 1, characterized in that, The ejection assembly includes a linear bearing housing, a linear bearing, and a cylinder. The linear bearing contacts the transom transition dummy shaft. The linear bearing housing is disposed around the linear bearing to limit the linear bearing. The cylinder is disposed at the end of the linear bearing away from the transom transition dummy shaft and is used to drive the linear bearing to eject upward.

7. The pressing mechanism according to claim 1, characterized in that, It includes a base platform for limiting the dummy shaft and the transition dummy shaft, and the base platform is provided with a through hole so that the transition dummy shaft can pass through.

8. A differential planetary gear shaft alignment and pressing device, characterized in that, The pressing equipment includes a controller and a pressing mechanism as described in any one of claims 1 to 7, wherein the controller is used to issue a start signal to drive the transverse transition pseudo-axis of the pressing mechanism to push upward.

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