Differential planetary gear shaft in-place detection and bearing installation integrated tooling

Abstract

The application relates to a differential planetary gear shaft in-position detection and bearing installation integrated tool, which comprises a first support piece, a second support piece, a third support piece arranged above the second support piece and capable of moving up and down, the second support piece being capable of limiting the up-and-down movement of the second support piece when being in a set position, the third support piece being used for placing a differential shell and the middle part of the third support piece being provided with a avoiding groove for avoiding a differential assembly shaft, the surface of the first support piece being further provided with a bearing installation mechanism for placing and installing a differential bearing, and the inside of the bearing installation mechanism being further provided with a detection mechanism for detecting whether a planetary gear shaft is in position; the differential planetary gear shaft missing installation detection and differential bearing press installation functions are integrated in a single tool, automatic process connection is realized through linkage control of the position relationship between the detection mechanism and the second support piece, traditional separated detection and installation processes are replaced, and the production rhythm is greatly shortened.

Description

Technical Field

[0001] This invention relates to the field of differential technology, specifically to an integrated tooling for detecting the planetary gear shaft of a differential and installing the bearing. Background Technology

[0002] The differential is a key component of a car's transmission system, playing a decisive role in the vehicle's steering function. The differential assembly process includes assembling the differential housing, planetary gears and their washers, half-shaft gears and their washers, planetary gear shaft, elastic pin, and upper and lower differential bearings, along with the differential bolts. In the differential manufacturing process, after assembling the differential housing, planetary gears and their washers, half-shaft gears and their washers, planetary gear shaft, and elastic pin, the upper and lower differential bearings are press-fitted.

[0003] Application announcement number CN120368022A discloses a differential housing, a differential, and a vehicle. According to its specification and drawings, the solution includes a differential housing with a first mounting hole and a second mounting hole, which are suitable for a gear shaft to pass through them.

[0004] However, during the assembly of differential components, human error often leads to the planetary gear shaft being omitted from assembly. After a series of assembly processes, rework gradually increases product quality costs.

[0005] Furthermore, existing detection methods are too limited and require additional inspection steps. Adding steps involves adding workstations, personnel, and equipment. From a production process perspective, this increases the space cost, labor cost, equipment cost, and time cost of the production line. Therefore, adding or removing individual inspection steps is unreasonable. Summary of the Invention

[0006] This invention primarily addresses problems encountered during differential assembly by developing an integrated fixture for detecting the presence of planetary gear shafts and installing bearings. It combines the detection of missing planetary gear shafts and the press-fitting of differential bearings into a single fixture, achieving automated process integration through the coordinated control of ejector pins, proximity switches, and cylinder components. This replaces the traditional separate detection and installation processes, eliminating additional independent sensor stations or manual visual inspection, and significantly shortening the production cycle time.

[0007] The objective of this invention is achieved through the following technical solution: a tooling integrating differential planetary gear shaft presence detection and bearing installation, comprising a first support member, a second support member slidably disposed on the surface of the first support member, a third support member above the second support member capable of moving up and down relative to the first support member, wherein the second support member, when in a set position, restricts the up and down movement of the third support member, the third support member is used to place the differential housing and has a clearance groove in the middle of the third support member to avoid the differential assembly shaft, the surface of the first support member is also provided with a bearing mounting mechanism for placing and installing differential bearings, and the bearing mounting mechanism is further provided with a detection mechanism for detecting whether the planetary gear shaft is in place, wherein when the detection mechanism detects that the planetary gear shaft is in place, the second support member releases its restriction on the third support member, thereby allowing an external bearing press to install the differential bearing onto the differential assembly shaft.

[0008] Preferably, the surface of the first support member is provided with a plurality of grooves, each groove is provided with a copper pad inside, the top of each copper pad is connected to the second support member, the surface of the second support member is provided with a first U-shaped groove, the surface of the first support member is also provided with a cylinder support frame, and a cylinder element is installed on one side of the cylinder support frame, the piston rod of the cylinder element is connected to one side of the second support member.

[0009] Preferably, the surface of the first support member is further provided with a plurality of sliding sleeves, and a first rectangular spring is provided between each sliding sleeve and the bottom of the third support member. Each sliding sleeve and the first rectangular spring are provided with a sliding rod inside, and the top of the sliding rod is connected to the bottom of the third support member.

[0010] Preferably, the surface of the third support member is provided with a second U-shaped groove and a first annular boss, the middle part of the differential housing can be locked on the first annular boss and the differential assembly shaft at the bottom of the differential housing passes through the second U-shaped groove, and the bottom of the third support member is also provided with a sliding limit plate for limiting the maximum sliding distance.

[0011] Preferably, the bearing mounting mechanism includes a first bearing pressure head and a first positioning slider. The surface of the first support member is provided with the first bearing pressure head, and the interior of the first bearing pressure head is provided with a first positioning slider that can slide up and down. The first positioning slider and the top of the first bearing pressure head are used to place the differential bearing. The first positioning slider can be squeezed by the differential assembly shaft and thus slide downward. After the differential housing is pressed down by the external bearing press, it can push the second support member to move downward, thereby causing the differential assembly shaft to be engaged in the interior of the differential bearing.

[0012] Preferably, the first bearing pressure head is provided with a second rectangular spring inside, the bottom of the first positioning slider is provided with a first annular limiting boss, one end of the second rectangular spring is stuck on the first annular limiting boss and the other end of the second rectangular spring is connected to the surface of the first support member.

[0013] Preferably, the detection mechanism includes a pin and a proximity switch. The first positioning slider has a first pin clearance hole in the middle. The first pin clearance hole has a pin that can slide up and down inside. The top of the pin has an arc-shaped concave surface adapted to the planetary gear shaft. The bottom of the first support member has a proximity switch for controlling the extension or retraction of the piston rod of the cylinder element. The proximity switch is used to sense whether the pin has extended to the correct position. When the pin slides down, the bottom of the pin can approach the end of the proximity switch.

[0014] Preferably, the surface of the first support member is also provided with a second ejector pin clearance hole, the interior of the second ejector pin clearance hole is provided with a pad, the middle part of the pad allows the ejector pin to slide up and down, the surface of the pad is provided with a second annular boss, the side wall of the ejector pin is also provided with a spring limiting plate, and a third rectangular spring is provided between the second annular boss and the spring limiting plate.

[0015] Preferably, the bottom of the first support member is provided with a sheet metal support member, on which a proximity switch is installed. The ejector pin also has an external spline, and the middle of the pad is provided with an internal spline adapted to the external spline. This design is to enable the ejector pin to descend vertically during the up-and-down sliding process.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The planetary gear shaft missing part detection process and the differential bearing pressing process are integrated into a single tooling. This is achieved through the coordinated control of the ejector pin, proximity switch, and cylinder components, enabling seamless process integration. This replaces the traditional separate detection and installation processes, eliminating additional independent sensor stations or manual visual inspection, significantly shortening the production cycle time, and substantially reducing production line space occupation, equipment costs, and manual intervention, thereby maximizing cost-effectiveness and production efficiency in the production process. 2. The arc-shaped concave surface of the ejector pin and the first positioning slider simultaneously serve as the positioning function of the differential housing, synchronously fixing the differential housing during the testing process. This solves the problem of bearing misalignment caused by vibration during the press-fitting of the differential bearing and improves the installation accuracy. 3. By interlocking the physical trigger condition of the ejector pin being squeezed by the planetary gear shaft with the electrical signal of the proximity switch, the third support component carrying the differential housing is forcibly constrained to prevent it from sliding downwards. If the planetary gear shaft is missing, the ejector pin cannot press down to trigger the proximity switch, the cylinder component will lock the second support component, preventing the third support component from being released from its limit position, and the bearing press will also be automatically stopped. This design embeds quality control points into the assembly process, preventing defective products from flowing into subsequent stages from the source. This achieves zero omission rate in production error prevention, eliminates the scrapping of the differential assembly due to the omission of the planetary gear shaft, and reduces quality costs. 4. The third support component and bearing mounting mechanism adopt a detachable design. The first rectangular spring buffer design of the first support component reduces the dependence on the accuracy of the mounting plane of the third support component. In addition, the bearing mounting mechanism is detachable as a whole. Combined with the universal clearance design of the first U-shaped groove and the second U-shaped groove, it can adapt to the size differences of different differential assembly shafts. This allows a single set of tooling to cover the production of multiple models. When switching, only modular parts need to be replaced, reducing the investment in special tooling and the downtime of production line modification. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 A perspective view of the structure that enables sliding between the first support member and the second support member of the present invention; Figure 3 This is a partial perspective view of the present invention; Figure 4 This is a partial cross-sectional view of the present invention; Figure 5 This is a cross-sectional view of the present invention; Figure 6 For the present invention in Figure 5 Enlarged view of region A in the image; Figure 7 This is a partial cross-sectional view of the present invention after the ejector pin has been removed; Figure 8 This is a partial cross-sectional view of the present invention.

[0018] Markings in the diagram: 1. First support member; 11. Slide groove; 12. Copper pad; 13. Cylinder support bracket; 14. Cylinder component; 15. Second ejector pin clearance hole; 2. Second support member; 21. First U-shaped groove; 3. Third support member; 31. Sliding sleeve; 32. First rectangular spring; 33. Slide rod; 34. Second U-shaped groove; 35. First annular boss; 36. Sliding limit plate; 4. Differential housing; 41. Differential assembly shaft; 42. Differential bearing; 43. Planetary gear shaft; 5. Bearing mount Assembly mechanism; 51. First bearing pressure head; 52. First positioning slider; 53. Second rectangular spring; 54. First annular limiting boss; 521. First ejector pin clearance hole; 6. Detection mechanism; 61. Ejector pin; 62. Proximity switch; 611. Arc-shaped concave surface; 612. Spring limiting plate; 63. Pad; 631. Second annular boss; 64. Third rectangular spring; 65. Sheet metal support; 7. Fixing plate; 71. Second bearing pressure head; 72. Second positioning slider; 73. Fourth rectangular spring. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments illustrated in the accompanying drawings: like Figure 1 and Figure 2 As shown, a differential planetary gear shaft in-situ detection and bearing installation integrated tooling includes a first support member 1 and a second support member 2 slidably disposed on the surface of the first support member 1.

[0020] In this embodiment, the surface of the first support member 1 is provided with a plurality of sliding grooves 11, and the interior of each sliding groove 11 is provided with a copper pad 12. The top of each copper pad 12 is connected to the second support member 2. The surface of the second support member 2 is provided with a first U-shaped groove 21. The surface of the first support member 1 is also provided with a cylinder support frame 13, and a cylinder element 14 is installed on one side of the cylinder support frame 13. The piston rod of the cylinder element 14 is connected to one side of the second support member 2.

[0021] like Figure 2 As shown, the piston rod of cylinder element 14 is currently in the extended position. When it is necessary to adjust the position of the second support 2 to release the restriction on the downward sliding of the third support 3, the piston rod of cylinder element 14 retracts, thereby pulling the second support 2. During the pulling process, the copper pad 12 at the bottom of the second support 2 slides inside the groove 11, serving a supporting and guiding function.

[0022] It should be noted that the first support member 1 has a 0.5mm thick oil groove in the slide groove 11 to store grease; the copper pad 12 is made of brass, which reduces the frictional resistance between metals and improves the service life of the sliding mechanism; the rear side of the second support member 2 is connected to the piston rod of the cylinder element 14 through a groove, which reduces the stress on the piston rod of the cylinder element 14 during extension and retraction, and improves the service life of the cylinder element 14.

[0023] Please continue to refer to this. Figure 3 and Figure 4 Above the second support member 2 is a third support member 3 that can move up and down relative to the first support member 1. When the second support member 2 is in a set position, it can restrict the up and down movement of the third support member 3. The third support member 3 is used to place the differential housing 4 and the middle part of the third support member 3 is provided with a clearance groove to avoid the differential mounting shaft 41.

[0024] In this embodiment, the surface of the first support member 1 is further provided with a plurality of sliding sleeves 31, and a first rectangular spring 32 is provided between each sliding sleeve 31 and the bottom of the third support member 3. Each sliding sleeve 31 and the first rectangular spring 32 is provided with a sliding rod 33 inside, and the top of the sliding rod 33 is connected to the bottom of the third support member 3. The surface of the third support member 3 is provided with a second U-shaped groove 34 and a first annular boss 35. The middle part of the differential housing 4 can be locked on the first annular boss 35, and the differential mounting shaft 41 at the bottom of the differential housing 4 passes through the second U-shaped groove 34. The bottom of the third support member 3 is also provided with a sliding limit plate 36 for limiting the maximum sliding distance.

[0025] Further explanation: Four sliding sleeves 31 are fixed diagonally on the first support member 1. The sliding sleeves 31 pass through the first support member 1, so that the sliding rod 33 can slide vertically within the sliding sleeves 31. The upper end of each sliding rod 33 is fixed at the four symmetrical corners of the third support member 3. The first support member 1 and each sliding sleeve 31 are supported by a first rectangular spring 32, so that the first rectangular spring 32 can restrict the movement of the sliding rod 33 to a certain extent. The second U-shaped groove 34 of the third support member 3 is a clearance space for the differential mounting shaft 41 at the bottom of the differential housing 4, and the axis of the second U-shaped groove 34 is consistent with the axis of the second ejector pin clearance hole 15 on the first support member 1.

[0026] The third support member 3 supports the differential housing 4. When the top of the differential housing 4 is pressed down by the lower end of an external bearing press, it can move downward along its own axis. During the downward movement of the third support member 3, the slide rod 33 slides within the slide sleeve 31, while the first rectangular spring 32 undergoes a certain deformation. When the differential housing 4 is no longer under force, the first rectangular spring 32 can reset the third support member 3.

[0027] Please refer to Figure 8 The lower end of the external bearing press is connected to a fixed plate 7. The surface of the fixed plate 7 is provided with a second bearing head 71. The interior of the second bearing head 71 is slidably connected with a second positioning slider 72. A fourth rectangular spring 73 is provided between the bottom of the second positioning slider 72 and the fixed plate 7.

[0028] The bearing press uses a conventional bearing press, which mainly consists of a press body, compression spring, thrust device, and other components. Based on existing technology, either a hydraulic bearing press or a mechanical bearing press can be used.

[0029] Before pressing down, the differential bearing 42 is first placed above the differential assembly shaft 41. Then, the pressing end of the bearing press moves vertically downwards along the axis of the differential assembly shaft 41. During the pressing process, the step at the top of the second positioning slider 72 extends into the interior of the differential assembly shaft 41. As the entire second bearing press head 71 and the second positioning slider 72 move downwards, the force generated at the top of the differential assembly shaft 41 pushes the second positioning slider 72 to slide inside the second bearing press head 71 until the bottom of the second bearing press head 71 is in contact with the top of the differential bearing 42. With the continuous pressing down of the pressing end of the bearing press, the second bearing press head 71 precisely mounts the differential bearing 42 onto the surface of the differential assembly shaft 41.

[0030] As the second bearing pressure head 71 pushes the differential bearing 42 to be installed on the differential assembly shaft 41, the second positioning slider 72 is always stuck inside the differential assembly shaft 41, thus ensuring that the axis of the installed differential bearing 42 coincides with the axis of the differential assembly shaft 41.

[0031] The diagonal support design of the first support component 1 provides excellent support, and the installation of the third support component 3 does not require high precision in the horizontal plane, reducing machining difficulty and tooling costs. The third support component 3 is also detachable, facilitating replacement and adaptability to different differential assembly models.

[0032] Please continue to refer to this. Figure 5 and Figure 6 The surface of the first support member 1 is also provided with a bearing mounting mechanism 5 for placing and installing the differential bearing 42.

[0033] The bearing mounting mechanism 5 includes a first bearing pressure head 51 and a first positioning slider 52. The surface of the first support member 1 is provided with the first bearing pressure head 51, and the interior of the first bearing pressure head 51 is provided with the first positioning slider 52, which can slide up and down. The top of the first positioning slider 52 and the first bearing pressure head 51 are used to place the differential bearing 42. The first positioning slider 52 can be squeezed by the differential assembly shaft 41 and thus slide downward. After the differential housing 4 is pressed down by the external bearing press, it can push the second support member 2 to move downward, thereby causing the differential assembly shaft 41 to be inserted into the interior of the differential bearing 42.

[0034] The first bearing pressure head 51 is provided with a second rectangular spring 53 inside, and the bottom of the first positioning slider 52 is provided with a first annular limiting boss 54. One end of the second rectangular spring 53 is stuck on the first annular limiting boss 54 and the other end of the second rectangular spring 53 is connected to the surface of the first support member 1.

[0035] With this setup, the differential bearing 42 is placed on the first bearing press head 51. Above the first positioning slider 52, the differential assembly shaft 41 at the bottom of the differential housing 4 is provided with the third support member 3. After the second support member 2 releases its limit on the third support member 3, the lower pressing end of the bearing press applies pressure to the differential housing 4. The differential housing 4 and the third support member 3 move downward, so that the differential assembly shaft 41 of the differential housing 4 is pressed into the assembly hole of the differential bearing 42. After the bearing is pressed in, the bearing press unloads the pressure on the differential housing 4, the second rectangular spring 53 returns to its original position, and drives the first positioning slider 52 to reset.

[0036] Similarly, during installation, the step at the top of the first positioning slider 52 first extends into the interior of the differential mounting shaft 41 located at the bottom of the differential housing 4. As the entire first bearing pressure head 51 and the first positioning slider 52 move downwards, the force generated at the top of the differential mounting shaft 41 pushes the first positioning slider 52 to slide inside the first bearing pressure head 51 until the bottom of the first bearing pressure head 51 is in contact with the top of the differential bearing 42. As the lower end of the bearing press continues to press down, the first bearing pressure head 51 can precisely install the differential bearing 42 onto the surface of the differential mounting shaft 41.

[0037] As the first bearing pressure head 51 pushes the differential bearing 42 to be installed on the differential assembly shaft 41, the first positioning slider 52 is always stuck inside the differential assembly shaft 41, thus ensuring that the axis of the installed differential bearing 42 coincides with the axis of the differential assembly shaft 41.

[0038] Furthermore, the entire bearing mounting mechanism 5 and the first support component 1 are detachable, making it easy to replace and adapt to different differential assembly models.

[0039] Please continue to refer to this. Figure 6 and Figure 7 The bearing mounting mechanism 5 is further provided with a detection mechanism 6 for detecting whether the planetary gear shaft 43 is in place. When the detection mechanism 6 detects that the planetary gear shaft 43 is in place, the second support member 2 releases the restriction on the third support member 3, thereby allowing the external bearing press to install the differential bearing 42 on the differential assembly shaft 41.

[0040] The detection mechanism 6 includes a pin 61 and a proximity switch 62. A first pin clearance hole 521 is provided in the middle of the first positioning slider 52. Inside the first pin clearance hole 521 is a pin 61 that can slide up and down. The top of the pin 61 has an arc-shaped concave surface 611 adapted to the planetary gear shaft 43. The bottom of the first support member 1 has a proximity switch 62 that controls the extension or retraction of the piston rod of the cylinder element 14. The proximity switch 62 is used to sense whether the pin 61 is fully extended. When the pin 61 slides down, the bottom of the pin 61 can approach the end of the proximity switch 62. The surface of the first support member 1 is also provided with a second ejector pin clearance hole 15. A pad 63 is provided inside the second ejector pin clearance hole 15. The middle part of the pad 63 allows the ejector pin 61 to slide up and down. The surface of the pad 63 is provided with a second annular boss 631. The side wall of the ejector pin 61 is also provided with a spring limiting plate 612. A third rectangular spring 64 is provided between the second annular boss 631 and the spring limiting plate 612. The bottom of the first support member 1 is provided with a sheet metal support member 65. A proximity switch 62 is installed on the sheet metal support member 65. The ejector pin 61 also has an external spline. The middle part of the pad 63 is provided with an internal spline adapted to the external spline.

[0041] Before installing the differential bearing 42, to further check whether the worker has missed installing the planetary gear shaft 43, the differential housing 4 is placed horizontally on the first annular boss 35 on the surface of the third support 3. Because the upper end of the ejector pin 61 has an arc-shaped concave surface 611, the planetary gear shaft 43 inside the differential housing 4 is stuck in the arc-shaped concave surface 611 and fixed. The planetary gear shaft 43 inside the differential housing 4 presses the upper end of the ejector pin 61, causing the lower end of the ejector pin 61 to slide downward in the middle of the first positioning slider 52 and the pad 63 until the bottom of the ejector pin 61 contacts the proximity switch 62. After the proximity switch 62 senses it, it outputs a signal, and the worker can start the equipment, the bearing press can work, and the piston rod of the cylinder element 14 will drive the second support 2 to release the limit on the third support 3. If the planetary gear shaft 43 is not installed in the differential housing 4, the lower end of the ejector pin 61 will not contact the proximity switch 62. At this time, after the worker starts the equipment, the bearing press will not work.

[0042] By incorporating an ejector pin 61, the planetary gear shaft 43 can be detected as missing, integrating the inspection of the previous process with the installation of the current process, thus avoiding subsequent cost waste. Furthermore, the ejector pin 61 and the first positioning slider 52 can also fix the differential housing 4, preventing vibration of the differential housing 4 during press-fitting and enhancing the quality of bearing press-fitting. Adding this invention to an existing bearing press to detect missing planetary gear shaft 43 avoids the need for additional equipment or processes. From a production process perspective, this saves space, labor, equipment, and time costs on the production line.

[0043] Working principle and usage of this invention: The differential housing 4 assembly is placed horizontally on the first annular boss 35 on the surface of the third support 3. The planetary gear shaft 43 inside the differential housing 4 will press the upper end of the ejector pin 61, causing the lower end of the ejector pin 61 to slide downward in the middle of the first positioning slider 52 and the pad 63 until the bottom of the ejector pin 61 contacts the proximity switch 62. The proximity switch 62 outputs a signal after sensing. Whether the ejector pin 61 slides downward is used to detect whether the planetary gear shaft 43 is missing. After the proximity switch 62 detects that there is no missing part, the personnel start the equipment. The differential bearing 42 is placed above the differential assembly shaft 41, and then the lower pressing end of the bearing press is vertically downward along the axial direction of the differential assembly shaft 41.

[0044] The bearing press presses the upper differential bearing 42 of the differential assembly shaft 41 of the differential housing 4. After the differential bearing 42 located above the differential housing 4 is pressed, the piston rod of the cylinder element 14 drives the second support 2 to release the restriction on the third support 3. The bearing press presses the lower differential bearing 42 of the differential assembly shaft 41 of the differential housing 4. After the pressing is completed, the lower pressing end of the bearing press is reset, the third support 3 returns to its original position under the action of the first rectangular spring 32, the piston rod of the cylinder element 14 extends, and the process is reset.

[0045] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A tooling integrating differential planetary gear shaft in-situ detection and bearing installation, comprising a first support member (1) and a second support member (2) slidably disposed on the surface of the first support member (1), characterized in that, Above the second support member (2) is a third support member (3) that can move up and down relative to the first support member (1). When the second support member (2) is in a set position, it can restrict the up and down movement of the third support member (3). The third support member (3) is used to place the differential housing (4), and the middle part of the third support member (3) is provided with a clearance groove to avoid the differential assembly shaft (41). The surface of the first support member (1) is also provided with a bearing mounting mechanism (5) for placing and installing the differential bearing (42). The bearing mounting mechanism (5) is also provided with a detection mechanism (6) for detecting whether the planetary gear shaft (43) is in place. When the detection mechanism (6) detects that the planetary gear shaft (43) is in place, the second support member (2) releases the restriction on the third support member (3), thereby allowing an external bearing press to install the differential bearing (42) onto the differential assembly shaft (41). The surface of the first support member (1) is also provided with a cylinder support bracket (13). A cylinder element (14) is installed on one side of the cylinder support frame (13), and the piston rod of the cylinder element (14) is connected to one side of the second support member (2); the bearing mounting mechanism (5) includes a first bearing pressure head (51) and a first positioning slider (52); the detection mechanism (6) includes a pin (61) and a proximity switch (62), the first positioning slider (52) is provided with a first pin clearance hole (521) in the middle, and the first pin clearance hole (521) is provided with a pin (61) that can slide up and down. The top of the pin (61) is provided with an arc-shaped concave surface (611) adapted to the planetary gear shaft (43), and the bottom of the first support member (1) is provided with a proximity switch (62) for controlling the piston rod of the cylinder element (14) to extend or retract. The proximity switch (62) is used to sense whether the pin (61) has extended to the position. When the pin (61) slides down, the bottom of the pin (61) can approach the end of the proximity switch (62).

2. The integrated tooling for differential planetary gear shaft in-situ detection and bearing installation according to claim 1, characterized in that, The surface of the first support member (1) is provided with a plurality of grooves (11), and each groove (11) is provided with a copper pad (12) inside. The top of each copper pad (12) is connected to the second support member (2), and the surface of the second support member (2) is provided with a first U-shaped groove (21).

3. The integrated tooling for differential planetary gear shaft in-situ detection and bearing installation according to claim 2, characterized in that, The surface of the first support member (1) is also provided with a plurality of sliding sleeves (31), and a first rectangular spring (32) is provided between each sliding sleeve (31) and the bottom of the third support member (3). Each sliding sleeve (31) and the first rectangular spring (32) are provided with a sliding rod (33) inside, and the top of the sliding rod (33) is connected to the bottom of the third support member (3).

4. The integrated tooling for differential planetary gear shaft in-situ detection and bearing installation according to claim 3, characterized in that, The surface of the third support member (3) is provided with a second U-shaped groove (34) and a first annular boss (35). The middle part of the differential housing (4) can be locked on the first annular boss (35) and the differential assembly shaft (41) at the bottom of the differential housing (4) passes through the second U-shaped groove (34). The bottom of the third support member (3) is also provided with a sliding limit plate (36) for limiting the maximum sliding distance.

5. The integrated tooling for differential planetary gear shaft in-situ detection and bearing installation according to claim 4, characterized in that, The surface of the first support member (1) is provided with a first bearing pressure head (51), and the inside of the first bearing pressure head (51) is provided with a first positioning slider (52) that can slide up and down. The top of the first positioning slider (52) and the first bearing pressure head (51) are used to place the differential bearing (42). The first positioning slider (52) can be squeezed by the differential assembly shaft (41) and slide down. After the differential housing (4) is pressed down by the external bearing press, it can push the second support member (2) to move down, so that the differential assembly shaft (41) is inserted into the interior of the differential bearing (42).

6. The integrated tooling for differential planetary gear shaft in-situ detection and bearing installation according to claim 5, characterized in that, The first bearing pressure head (51) is provided with a second rectangular spring (53) inside, the bottom of the first positioning slider (52) is provided with a first annular limiting boss (54), one end of the second rectangular spring (53) is stuck on the first annular limiting boss (54) and the other end of the second rectangular spring (53) is connected to the surface of the first support member (1).

7. The integrated tooling for differential planetary gear shaft in-situ detection and bearing installation according to claim 6, characterized in that, The surface of the first support member (1) is also provided with a second ejector pin clearance hole (15), and the interior of the second ejector pin clearance hole (15) is provided with a pad (63). The middle part of the pad (63) allows the ejector pin (61) to slide up and down. The surface of the pad (63) is provided with a second annular boss (631). The side wall of the ejector pin (61) is also provided with a spring limiting plate (612). A third rectangular spring (64) is provided between the second annular boss (631) and the spring limiting plate (612).

8. The differential planetary gear shaft in-situ detection and bearing installation integrated tooling according to claim 7, wherein the bottom of the first support member (1) is provided with a sheet metal support member (65), a proximity switch (62) is installed on the sheet metal support member (65), an external spline is provided on the ejector pin (61), and an internal spline adapted to the external spline is provided in the middle of the pad plate (63).

9. The integrated fixture for differential planetary gear shaft in-situ detection and bearing installation according to claim 8, characterized in that, The lower end of the external bearing press is connected to a fixed plate (7). The surface of the fixed plate (7) is provided with a second bearing head (71). The interior of the second bearing head (71) is slidably connected with a second positioning slider (72). A fourth rectangular spring (73) is provided between the bottom of the second positioning slider (72) and the fixed plate (7).

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