A multi-guide-pillar supported hydraulic clamping device for machining differential shells.

Abstract

This invention discloses a multi-guide-pillar supported hydraulic clamping device for machining differential shells, comprising a drill jig assembly, a floating mechanism assembly, and a base assembly. The positioning mandrel of the drill jig assembly has an inner stop that fits with the outer circle of the large end of the differential shell with clearance. The positioning pin of the floating mechanism assembly is inserted into the bearing disassembly groove of the small end of the differential shell to fix the circumferential position of the differential shell. A first hydraulic cylinder drives the drill jig assembly to slide up and down along the first guide pillar, pressing and releasing the differential shell. A second hydraulic cylinder of the base assembly drives the floating mechanism assembly to float up and down along the second guide pillar, moving the differential shell up and down within the device. It is suitable for machining large holes in differential shells, can automatically clamp and fix the differential shell, has a high degree of automation, reduces the labor intensity of workers, and ensures stable machining quality.

Description

Technical Field

[0001] This invention relates to the field of automobile manufacturing technology, specifically to a multi-guide-pillar supported upper and lower linkage hydraulic clamping device for machining differential shells, suitable for machining large-face differential shells after automatic clamping on equipment. Background Technology

[0002] With increasing competition and technological updates in the automotive manufacturing industry, production line automation has become a direction for enterprise upgrading. Traditional production models are difficult to meet the needs of large-scale production. Currently, most of the large-diameter face plates in the machining of shells are processed by vertical machining centers, which require manual clamping, resulting in high labor intensity for workers and long production cycles. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-guide-pillar supported upper and lower linkage hydraulic clamping device for shell machining.

[0004] The technical solution provided by this invention is: a multi-guide-column supported upper and lower linkage hydraulic clamping device for differential shell processing, which is special in that it is composed of a drill jig assembly, a floating mechanism assembly, and a base assembly; The drill jig assembly consists of a drill template, an end cap, a first screw, a positioning mandrel, a drill sleeve, and a second bushing. Four pin holes are located at the four corners of the drill template edge, and the outer circle of the second bushing mates with these pin holes. The drill template has a central hole. Both the end cap and the positioning mandrel have external stops, which are clearance-fitted with the central hole on the drill template. The end face of the external stop of the end cap contacts the upper plane of the drill template, and the upper plane of the external stop of the positioning mandrel contacts the lower plane of the drill template. The end cap and the positioning mandrel are threaded together by the first screw. The positioning mandrel has an internal stop, which is clearance-fitted with the outer circle of the large end of the differential housing, used to position the radial center of the differential housing. The drill template has a flange hole, and the drill sleeve is interference-fitted with the flange hole. The floating mechanism assembly consists of a floating base plate, first guide pillars, a first pad plate, a positioning seat, a positioning pin, a first hydraulic cylinder, double-ended bolts, a first nut, and a second nut. The floating base plate has pin holes; one end of each of the four first guide pillars passes through these pin holes and is threaded into the second nut, with the tightening end face of the second nut contacting the lower surface of the floating base plate. The other ends of the four first guide pillars are clearance-fitted into the inner hole of the second bushing. A first pad plate is fixed at the center of the upper surface of the floating base plate, and the lower surface of the first pad plate has a groove. A positioning seat is fixed on the plane, and the positioning seat is threadedly connected to a positioning pin. The positioning pin is inserted into the bearing disassembly groove at the small end of the differential housing to position the differential housing circumferentially. A first hydraulic cylinder is fixed on the upper plane of the floating base plate. The input shaft of the first hydraulic cylinder is threadedly connected to one end of a double-ended bolt. The other end of the double-ended bolt is threadedly connected to a first nut after clearance fitting with a pin hole on the drill template. The lower end face of the first nut contacts the upper plane of the drill template. The extension and retraction of the output shaft of the first hydraulic cylinder drives the drill jig assembly to slide up and down along the first guide post, loosening and tightening the differential housing. The base assembly consists of a second hydraulic cylinder, a second pad, second guide pillars, a base plate, and a fourth screw. Pin holes are provided at the four corners of the base plate. One end of each of the four second guide pillars is clearance-fitted with the pin holes on the base plate, and the other end is clearance-fitted with the inner hole of the bushing on the floating base plate. The second hydraulic cylinder, the second pad, and the base plate are fixedly connected. The output shaft of the second hydraulic cylinder is fixed to the floating base plate. The output shaft of the second hydraulic cylinder presses against the upper surface of the groove on the lower surface of the first pad. The extension and retraction of the output shaft of the second hydraulic cylinder causes the floating mechanism assembly to slide up and down along the four second guide pillars.

[0005] Furthermore, the outer circle of the second bushing is interference-fitted with the pin hole on the drill template.

[0006] Furthermore, the second hydraulic cylinder and the second pad are threadedly connected to the base plate after being passed through by a third screw.

[0007] Furthermore, the floating base plate is provided with a pin hole, and a first bushing is provided inside the pin hole. The first bushing is interference-fitted with the pin hole on the floating base plate.

[0008] The beneficial effects of this invention are as follows: 1. The first pad supports the small end face of the differential housing, and the positioning pin is inserted into the bearing disassembly groove of the small end of the differential housing to determine the placement position and angle of the differential housing in the device. Under the drive of the first hydraulic cylinder and the second hydraulic cylinder, the differential housing is pressed and driven to move the differential housing closer to the drill bit on the equipment, reducing manual pressing and significantly reducing labor intensity; 2. It is suitable for processing large holes in differential housings, and can automatically clamp and fix the differential housing, with a high degree of automation and high production efficiency, while ensuring stable processing quality of the differential housing. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 yes Figure 1 Top view.

[0010] In the diagram: 1. Drill jig assembly, 2. Floating mechanism assembly, 3. Base assembly, 4. Drill template, 5. First bushing, 6. First guide post, 7. Second bushing, 8. Drill sleeve, 9. End cap, 10. Centering mandrel, 11. First pad, 12. Positioning seat, 13. First nut, 14. First screw, 15. Floating base plate, 16. Second nut, 17. Positioning pin, 18. Second screw, 19. First hydraulic cylinder, 20. Second guide post, 21. Double-ended bolt, 22. Second nut, 23. Third screw, 24. Second hydraulic cylinder, 25. Second pad, 26. Base plate, 27. Fourth screw. Detailed Implementation

[0011] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings.

[0012] like Figure 1 , 2 As shown, a multi-guide-pillar supported upper and lower linkage hydraulic clamping device for differential shell processing is composed of a drill jig assembly 1, a floating mechanism assembly 2, and a base assembly 3. The drill jig assembly 1 consists of a drill template 4, an end cap 9, a first screw 14, a positioning mandrel 10, a drill sleeve 8, and a second bushing 7. The drill template 4 has four pin holes, and the outer circle of the second bushing 7 is interference-fitted with the pin holes. The drill template 4 has a center hole. Both the end cap 9 and the positioning mandrel 10 have external stops, which are clearance-fitted with the center hole on the drill template 4. The end face of the external stop of the end cap 9 contacts the upper plane of the drill template 4, and the upper plane of the external stop of the positioning mandrel 10 contacts the lower plane of the drill template 10. The end cap 9 and the positioning mandrel 10 are threaded together by the first screw 14. The positioning mandrel 10 has an inner stop, which can be clearance-fitted with the outer circle of the large end of the differential housing to fix the radial center of the differential housing. The drill template 4 has eight flange holes, and the drill sleeve 8 is interference-fitted with the flange holes. The floating mechanism assembly 2 consists of a floating base plate 15, first guide pillars 6, first pads 11, positioning seats 12, first bushings 5, positioning pins 17, first hydraulic cylinders 19, double-ended bolts 21, first nuts 13, and second nuts 16. The floating base plate 15 has pin holes. One end of each of the four first guide pillars 6 passes through the pin holes on the floating base plate 15 and is threadedly connected to the second nuts 16. The fastening end face of the second nuts 16 contacts the lower surface of the floating base plate 15. The other ends of the four first guide pillars 6 are clearance-fitted with the inner hole of the second bushing 7. The first pad 11 is fixed to the upper surface of the floating base plate 15 by second screws 18. The lower surface of the first pad 11 has a groove. The output shaft of the second hydraulic cylinder 24 is pressed against the upper surface of the groove. The positioning seat 12 is fixed on the upper surface of the first pad 11. The positioning seat 12 is provided with a threaded hole, and the positioning pin 17 is threadedly connected to the positioning seat 12. The positioning pin 17 is inserted into the bearing disassembly groove of the small end of the differential housing to position the circumferential position of the differential housing and fix the circumferential position of the differential housing. The first hydraulic cylinder 19 is fixed on the upper surface of the floating base plate 15. The input shaft of the first hydraulic cylinder 19 is provided with a threaded hole. One end of the double-ended bolt 21 is threadedly connected to the first hydraulic cylinder 19, and the other end is clearance-fitted with the pin hole provided on the drill template 4 and then threadedly connected to the first nut 13. The lower end face of the first nut 13 contacts the upper surface of the drill template 4. The retraction of the output shaft of the first hydraulic cylinder 19 drives the drill jig assembly 1 to slide up and down along the first guide post 6, which can loosen and tighten the differential housing. A pin hole is provided on the floating base plate 15, and the first bushing 5 is interference-fitted with the pin hole on the floating base plate 15. The base assembly 3 consists of a second nut 22, a second hydraulic cylinder 24, a third screw 23, a second pad 25, a second guide post 20, a base plate 26, and a fourth screw 27. The base plate 26 is fixed to the equipment platform by the fourth screw 27. The base plate 26 has pin holes. One end of the four second guide posts 20 is clearance-fitted with the pin holes on the base plate 26, and the other end of the four second guide posts 20 is clearance-fitted with the inner hole of the first bushing 5. The third screw 23 passes through the second hydraulic cylinder 24 and the second pad 25 from top to bottom and is threaded to the base plate 26. The output shaft of the second hydraulic cylinder 24 is fixed to the floating base plate 15 by the second nut 22. The extension and retraction of the output shaft of the second hydraulic cylinder 24 drives the floating mechanism assembly 2 to slide up and down along the four second guide posts 20, causing the differential housing to move closer to or away from the main shaft of the equipment, and the drill bit on the equipment to enter and exit the drill sleeve 8.

[0013] The present invention discloses a multi-guide-pillar supported upper and lower linkage hydraulic clamping device for machining differential shells. After installation, the specific operation is as follows: Place the unmachined differential shell with large holes onto the device, with the large end facing upwards and the bearing end face of the small end in contact with the upper plane of the first pad. The bearing disassembly groove of the small end of the differential shell is close to the positioning pin (e.g., Figure 1After the above operations are completed, the first hydraulic cylinder is activated. The first hydraulic cylinder retracts, causing the drill jig assembly to slide downwards towards the differential housing via the first guide post. After the inner stop on the positioning mandrel is fitted with the outer circle of the large end of the differential housing, the differential housing is pressed tightly. After the above operations are completed, the second hydraulic cylinder is activated. The second hydraulic cylinder extends, pushing the floating mechanism assembly upwards along the second guide post. At the same time, the equipment is started. The eight drill bits installed on the equipment approach the differential housing through the drill sleeve and simultaneously complete the machining of the large hole of the differential housing. When the floating mechanism assembly moves upwards to the designated position, the machining of the large hole of the differential housing is completed. After processing is completed, the second hydraulic cylinder is activated. The second hydraulic cylinder retracts, causing the floating mechanism assembly to move downwards along the second guide post to the designated position. At the same time, the differential housing moves away from the drill bit, and the drill bit disengages from the drill sleeve. The first hydraulic cylinder is then activated, extending and causing the drill jig assembly to slide away from the differential housing on the first guide post, releasing the differential housing and lifting it off. This completes the processing of a large-diameter hole on a differential housing. The next workpiece is then installed, and the aforementioned cycle is repeated to complete the processing of large-diameter holes on a batch of differential housings. By simply setting the strokes of the first and second hydraulic cylinders and making positioning mandrels and drill templates of different sizes according to the outer diameter of the large end of the differential housing, it can be applied to the processing of different differential housings.

[0014] It should be understood that any technical features not elaborated in detail in this specification belong to the prior art. Although the embodiments of this invention have been described above in conjunction with the accompanying drawings, this invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this invention without departing from the spirit and scope of protection of the claims, and these all fall within the scope of protection of this invention.

Claims

1. A multi-guide-pillar supported upper and lower linkage hydraulic clamping device for machining differential shells, characterized in that, It consists of a drill jig assembly, a floating mechanism assembly, and a base assembly; The drill jig assembly consists of a drill template, an end cap, a first screw, a positioning mandrel, a drill sleeve, and a second bushing. Four pin holes are located at the four corners of the drill template edge, and the outer circle of the second bushing mates with these pin holes. The drill template has a central hole. Both the end cap and the positioning mandrel have external stops, which are clearance-fitted with the central hole on the drill template. The end face of the external stop of the end cap contacts the upper plane of the drill template, and the upper plane of the external stop of the positioning mandrel contacts the lower plane of the drill template. The end cap and the positioning mandrel are threaded together by the first screw. The positioning mandrel has an internal stop, which is clearance-fitted with the outer circle of the large end of the differential housing, used to position the radial center of the differential housing. The drill template has a flange hole, and the drill sleeve is interference-fitted with the flange hole. The floating mechanism assembly consists of a floating base plate, first guide pillars, a first pad plate, a positioning seat, a positioning pin, a first hydraulic cylinder, double-ended bolts, a first nut, and a second nut. The floating base plate has pin holes; one end of each of the four first guide pillars passes through these pin holes and is threaded into the second nut, with the tightening end face of the second nut contacting the lower surface of the floating base plate. The other ends of the four first guide pillars are clearance-fitted into the inner hole of the second bushing. A first pad plate is fixed at the center of the upper surface of the floating base plate, and the lower surface of the first pad plate has a groove. A positioning seat is fixed on the plane, and the positioning seat is threadedly connected to a positioning pin. The positioning pin is inserted into the bearing disassembly groove at the small end of the differential housing to position the differential housing circumferentially. A first hydraulic cylinder is fixed on the upper plane of the floating base plate. The input shaft of the first hydraulic cylinder is threadedly connected to one end of a double-ended bolt. The other end of the double-ended bolt is threadedly connected to a first nut after clearance fitting with a pin hole on the drill template. The lower end face of the first nut contacts the upper plane of the drill template. The extension and retraction of the output shaft of the first hydraulic cylinder drives the drill jig assembly to slide up and down along the first guide post, loosening and tightening the differential housing. The base assembly consists of a second hydraulic cylinder, a second pad, second guide pillars, a base plate, and a fourth screw. Pin holes are provided at the four corners of the base plate. One end of each of the four second guide pillars is clearance-fitted with the pin holes on the base plate, and the other end is clearance-fitted with the inner hole of the bushing on the floating base plate. The second hydraulic cylinder, the second pad, and the base plate are fixedly connected. The output shaft of the second hydraulic cylinder is fixed to the floating base plate. The output shaft of the second hydraulic cylinder presses against the upper surface of the groove on the lower surface of the first pad. The extension and retraction of the output shaft of the second hydraulic cylinder causes the floating mechanism assembly to slide up and down along the four second guide pillars.

2. The multi-guide-pillar supported upper and lower linkage hydraulic clamping device for differential shell machining according to claim 1, characterized in that, The outer circle of the second bushing is interference-fitted with the pin hole on the drill template.

3. The multi-guide-pillar supported upper and lower linkage hydraulic clamping device for differential shell machining according to claim 1, characterized in that, The second hydraulic cylinder and the second pad are threadedly connected to the base plate after being passed through by a third screw.

4. The multi-guide-pillar supported upper and lower linkage hydraulic clamping device for differential shell machining according to claim 1, characterized in that, The floating base plate is provided with a pin hole, and a first bushing is provided inside the pin hole. The first bushing is interference-fitted with the pin hole on the floating base plate.

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