A vertical drilling device for differential housing

Abstract

The present invention relates to the field of automobile manufacturing technology, and in particular to a vertical processing and drilling device for a differential housing. A vertical processing and drilling device for a differential housing is provided, which can improve the fixing effect and avoid the deviation of the drilling position. A vertical processing and drilling device for a differential housing includes a cross slide, a puncher, a support frame, a support seat and a slide rail, etc.; the puncher is connected to the upper part of the cross slide, the support frame is connected to the cross slide, the support seat is connected to the upper left part of the support frame, and a number of slide rails are equidistantly connected to the support seat. The fixing claw moves inward to clamp the outer side of the upper part of the differential housing, and the contact block moves outward to support the inner side of the lower part of the differential housing. The differential housing is drilled by the puncher. When drilling, the device fixes the upper and lower parts of the differential housing inside and outside respectively, which can effectively prevent the differential housing from moving and causing the drilling position to be offset.

Description

Technical Field

[0001] The invention relates to the technical field of automobile manufacturing, and in particular to a vertical processing drilling device for a differential housing. Background Art

[0002] The differential is the main part of the car drive train, and the differential case is the skeleton of the differential gear, half-shaft gear, and cross shaft. The differential case combines them together. The differential case needs to be drilled during the production and processing.

[0003] The patent with the patent authorization announcement number CN211939154U discloses a vertical processing drilling device for differential housing, which includes a base assembly, a clamping device, a support block, a mandrel, an upper positioning plate assembly, and a side positioning device. Its characteristics are that the base assembly is provided with a clamping device, a support block, a side positioning device, and a mandrel; the mandrel is connected to the upper positioning plate assembly through a positioning key to locate the radial center of the differential housing; the side positioning device locates the center of the cross shaft hole of the differential housing through a positioning pin; the clamping device is pressed on the upper plane of the upper positioning plate assembly through three pressing plates to press the differential housing; it is suitable for processing the large end face basin gear mounting hole of the differential housing and the cross shaft locking threaded hole. However, the drilling device only presses the differential housing through three pressing plates, and the fixing effect is not good. When drilling, the differential housing is easily displaced, resulting in the displacement of the drilling position.

[0004] To this end, we propose a vertical processing drilling device for a differential case which can improve the fixing effect and avoid the deviation of the drilling position. Summary of the invention

[0005] In order to overcome the shortcomings of the existing drilling device, such as poor fixing effect and easy deviation of the drilling position, the technical problem of the present invention is to provide a vertical processing drilling device for a differential case which can improve the fixing effect and avoid deviation of the drilling position.

[0006] The technical implementation scheme of the present invention is: a vertical processing drilling device for a differential housing, including a cross slide, a puncher, a support frame, a support seat, a slide rail, a positioning mechanism, an expansion mechanism and an opening and closing mechanism, wherein the puncher is connected to the upper part of the cross slide, the support frame is connected to the cross slide, the upper left part of the support frame is connected to the support seat, a number of slide rails are equidistantly connected to the support seat, a positioning mechanism for fixing the upper part of the differential housing is provided between the slide rail and the support frame, an expansion mechanism for expanding and supporting the lower part of the differential housing is provided at the lower part of the support seat, and an opening and closing mechanism for automatically enabling the expansion mechanism to support the differential housing is provided between the positioning mechanism and the support seat.

[0007] Furthermore, the positioning mechanism includes a synchronous disk, a fixed claw and a drive assembly. The upper part of the support seat is rotatably connected to the synchronous disk, and the sliding rails are slidably connected to the fixed claws. The synchronous disk rotates to squeeze the fixed claws to move inward to clamp the upper part of the differential housing. A drive assembly is provided between the support frame and the synchronous disk, and the drive assembly is used to drive the synchronous disk to rotate.

[0008] Furthermore, the driving assembly includes a dual-axis motor, a first gear and a fan-shaped gear. The dual-axis motor is connected to the right part of the support frame, the first gear is connected to the output shaft above the dual-axis motor, the fan-shaped gear is connected to the right part of the synchronization disk, and the fan-shaped gear is meshed with the first gear.

[0009] Furthermore, the expansion mechanism includes a first slide bar, a first spring, a connecting rod, a contact block, a sliding sleeve and a second spring. The first slide bar is slidably connected to the lower part of the support seat, the first slide bar and the support seat are both connected with the first spring, the first slide bar is slidably connected to the upper part of the first slide bar, the sliding sleeve and the first slide bar are both connected with the second spring, a number of connecting rods are equidistantly rotatably connected to the sliding sleeve, a number of connecting rods are rotatably connected to the bottom of the support seat, the connection between the adjacent upper and lower connecting rods is rotatably connected with the contact block, the contact block moves outward to fit the inner wall of the differential case, thereby supporting and fixing the differential case.

[0010] Furthermore, the opening and closing mechanism includes a spatial cam, a sliding frame and a guide rod. The spatial cam is connected to the output shaft below the dual-axis motor, the guide rod is connected to the lower left part of the support seat, the sliding frame is slidably connected to the guide rod, the sliding frame passes through the lower part of the first sliding rod, and the right end of the sliding frame is slidably connected to the spatial cam. The rotation of the spatial cam causes the sliding frame to pull the first sliding rod to slide downward.

[0011] Furthermore, it also includes an anti-rotation mechanism for preventing the differential case from rotating, the anti-rotation mechanism includes a guide sleeve, a pressure rod and a third spring, guide sleeves are connected on both sides of the fixed claw, pressure rods are slidably connected in the guide sleeves, the pressure rods move inward with the fixed claws to further position the differential case, and the third springs are connected between the pressure rods and the adjacent guide sleeves.

[0012] Furthermore, it also includes a fixing mechanism for further clamping the differential housing, the fixing mechanism includes a threaded disk, a second slide bar, a rack rack, a second gear, a rotating plate and a fourth spring, the output shaft below the dual-axis motor is connected to a threaded disk, the middle part of the support frame is slidably connected to the second slide bar, the second slide bar is slidably connected to the threaded disk, the left part of the second slide bar is slidably connected to the rack rack, a fourth spring is connected between the rack rack and the second slide bar, the front and rear parts of the lower part of the support seat are rotatably connected to the rotating plate, the lower part of the rotating plate is connected to the second gear, the second gear is meshed with the rack rack, the rack rack moves to the left and cooperates with the second gear to make the rotating plate rotate inward to clamp the lower part of the differential housing.

[0013] Furthermore, it also includes a pressing mechanism for pressing down the differential housing, the pressing mechanism includes a piston rod, a connecting frame and a rotating arm, the piston rod is slidably connected to the upper inner part of the first sliding rod, the top of the piston rod is connected to the connecting frame, the left and right parts of the connecting frame are rotatably connected to the rotating arms, the lower parts of the rotating arms are in contact with the sliding sleeves, the rotating arms move downward and are squeezed by the sliding sleeves to rotate outwards, and then get stuck on the differential housing to press the differential housing.

[0014] The present invention has the following advantages: 1. The fixing claw moves inward to clamp the outer side of the upper part of the differential case, and the contact block moves outward to support the inner side of the lower part of the differential case. The differential case is drilled by a puncher. When drilling, the device fixes the upper and lower parts of the differential case inside and outside respectively, which can effectively prevent the differential case from moving and causing the drilling position to shift.

[0015] 2. The pressure rod moves inward with the fixed claws to clamp the differential housing to prevent the fixed claws from slipping due to the sprayed coolant when drilling.

[0016] 3. The rack is meshed with the second gear, causing the rotating plate to rotate inward and clamp the lower part of the differential housing, reducing vibration and facilitating drilling.

[0017] 4. The swing arm rotates outward and then moves downward to press down the differential housing, further improving stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a partial three-dimensional structural schematic diagram of the present invention.

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the positioning mechanism of the present invention.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the expansion mechanism of the present invention.

[0022] Figure 5 It is an enlarged view of point A of the present invention.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the opening and closing mechanism of the present invention.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the anti-rotation mechanism of the present invention.

[0025] Figure 8 It is an enlarged view of B of the present invention.

[0026] Fig. 9 It is a schematic diagram of the three-dimensional structure of the fixing mechanism of the present invention.

[0027] Fig.10 It is an enlarged view of location C of the present invention.

[0028] Fig.11 It is a schematic diagram of the three-dimensional structure of the pressing mechanism of the present invention.

[0029] Fig.12 It is an enlarged view of D of the present invention.

[0030] Figure numbers: 1-cross slide, 2-punch, 3-support frame, 4-support seat, 5-slide rail, 6-differential housing, 7-positioning mechanism, 71-dual-axis motor, 72-first gear, 73-sector gear, 74-synchronous plate, 75-fixed claw, 8-expansion mechanism, 81-first slide rod, 82-first spring, 83-connecting rod, 84-contact block, 85-slide sleeve, 86-second spring, 9-anti-rotation mechanism , 91-guide sleeve, 92-pressure rod, 93-third spring, 10-opening and closing mechanism, 101-space cam, 102-sliding frame, 103-guide rod, 11-fixing mechanism, 111-threaded disk, 112-second sliding rod, 113-rack frame, 114-second gear, 115-rotating sheet, 116-fourth spring, 12-pressing mechanism, 121-piston rod, 122-connecting frame, 123-rotating arm. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] Example 1

[0033] A vertical drilling device for a differential housing, such as Figure 1-Figure 6 As shown, it includes a cross slide 1, a puncher 2, a support frame 3, a support seat 4, a slide rail 5, a positioning mechanism 7, an expansion mechanism 8 and an opening and closing mechanism 10. The puncher 2 is bolted to the upper part of the cross slide 1, and the support frame 3 is bolted to the cross slide 1. The support seat 4 is welded to the upper left part of the support frame 3, and three slide rails 5 are equidistantly connected to the support seat 4. A positioning mechanism 7 is provided between the slide rail 5 and the support frame 3, and the positioning mechanism 7 can fix the upper part of the differential housing 6. An expansion mechanism 8 is provided at the lower part of the support seat 4, and the expansion mechanism 8 can expand and support the lower part of the differential housing 6. An opening and closing mechanism 10 is provided between the positioning mechanism 7 and the support seat 4, and the opening and closing mechanism 10 can automatically enable the expansion mechanism 8 to support the differential housing 6.

[0034] When using the device, the staff puts the differential case 6 that needs to be punched into the support seat 4, and then fixes the upper part of the differential case 6 through the positioning mechanism 7. While the positioning mechanism 7 is operating, it will also drive the expansion mechanism 8 to expand and support the lower part of the differential case 6 through the space cam 101, further fixing the differential case 6. Then the staff adjusts the position of the differential case 6 through the cross slide 1, so that the position where the differential case 6 needs to be punched is located directly below the punching machine 2. After the position adjustment is completed, the differential case 6 is punched by the punching machine 2, completing one time. After drilling, the position is adjusted by the cross slide 1, and the drilling action is repeated. When the flange holes in the eccentric position of the differential case 6 are all drilled, the staff can control the positioning mechanism 7 to loosen the differential case 6, and then the opening and closing mechanism 10 drives the expansion mechanism 8 to loosen the differential case 6 together, so as to replace the differential case 6 after the drilling is completed. In this way, the differential case 6 can be drilled. At the same time, the device can fix the upper and lower parts of the differential case 6 at the same time, and fix them inside and outside respectively, which can effectively prevent the differential case 6 from moving and causing the drilling position to shift.

[0035] like Figure 1-Figure 3 As shown, the positioning mechanism 7 includes a synchronization disk 74, a fixed claw 75 and a driving assembly. The synchronization disk 74 is rotatably connected to the upper part of the support seat 4, and the fixed claw 75 is slidably connected in the slide rail 5. A driving assembly is provided between the support frame 3 and the synchronization disk 74, and the driving assembly can drive the synchronization disk 74 to rotate.

[0036] like Figure 1-Figure 3 As shown, the driving assembly includes a dual-axis motor 71, a first gear 72 and a fan gear 73. The dual-axis motor 71 is bolted to the right part of the support frame 3, the first gear 72 is keyed to the output shaft above the dual-axis motor 71, and the fan gear 73 is welded to the right part of the synchronization disk 74, and the fan gear 73 is meshed with the first gear 72.

[0037] When using the device, after the differential case 6 is placed on the support seat 4, the staff starts the dual-axis motor 71, and the output shaft of the dual-axis motor 71 rotates to drive the first gear 72 to rotate. The first gear 72 rotates through the sector gear 73 to drive the synchronous disk 74 to rotate. The synchronous disk 74 rotates to squeeze the fixed claw 75 to slide inward in the slide rail 5, and the fixed claw 75 slides inward to clamp the upper part of the differential case 6 to fix the differential case 6. After the fixed claw 75 clamps the differential case 6, the staff controls the dual-axis motor 71 to stop operating. When the drilling is completed, the staff controls the output shaft of the dual-axis motor 71 to reverse, so that the synchronous disk 74 reverses and no longer squeezes the fixed claw 75. At this time, the staff can directly take out the punched differential case 6 for replacement, as shown below, and can clamp the upper part of the differential case 6 to fix the differential case 6, which is convenient for drilling.

[0038] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the expansion mechanism 8 includes a first slide bar 81, a first spring 82, a connecting rod 83, a contact block 84, a sleeve 85 and a second spring 86. The first slide bar 81 is slidably connected to the lower part of the support seat 4, the first spring 82 is connected between the first slide bar 81 and the support seat 4, the sleeve 85 is slidably connected to the upper part of the first slide bar 81, the second spring 86 is connected between the sleeve 85 and the first slide bar 81, three connecting rods 83 are equidistantly rotatably connected on the sleeve 85, the three connecting rods 83 are rotatably connected to the bottom of the support seat 4, and the connection between the adjacent upper and lower connecting rods 83 is rotatably connected to the contact block 84.

[0039] like Figure 1 , Figure 2 and Figure 6 As shown, the opening and closing mechanism 10 includes a space cam 101, a sliding frame 102 and a guide rod 103. The space cam 101 is keyed on the output shaft below the dual-axis motor 71, a guide rod 103 is welded to the left lower part of the support seat 4, the sliding frame 102 is slidably connected to the guide rod 103, the sliding frame 102 passes through the lower part of the first sliding bar 81, and the right end of the sliding frame 102 is slidably connected to the space cam 101.

[0040] When using the device, the output shaft of the dual-axis motor 71 rotates to drive the space cam 101 to rotate, and the rotation of the space cam 101 drives the sliding frame 102 to slide downward on the guide rod 103, and the sliding frame 102 slides downward to drive the first sliding bar 81 to slide downward, and the first spring 82 is deformed, and the first sliding bar 81 slides downward to drive the sliding sleeve 85 to move downward, and the sliding sleeve 85 moves downward to make the connection between the upper and lower connecting rods 83 move outward, thereby driving the contact block 84 to move outward and open, and then fit with the lower inner wall of the differential case 6, further fixing the differential case 6, when the contact block 84 is in contact with the lower inner wall of the differential case 6, the contact block 84 is in contact with the lower inner wall of the differential case 6. After the wall is fitted, the first slide bar 81 continues to slide downward and will slide downward in the sleeve 85, and the second spring 86 will be deformed. When the drilling is completed, the output shaft of the dual-axis motor 71 reverses to drive the space cam 101 to reverse, and the space cam 101 reverses to drive the sliding frame 102 to slide upward. Under the action of the first spring 82 resetting, the first slide bar 81 slides upward and resets. Under the action of the second spring 86 resetting, the sleeve 85 also moves upward and resets, and then drives the contact block 84 to move inward and reset through the connecting rod 83. In this way, the differential case 6 can be further fixed, the stability is improved, and the displacement of the differential case 6 is avoided.

[0041] Example 2

[0042] On the basis of Example 1, Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, an anti-rotation mechanism 9 is also included, which can prevent the differential case 6 from rotating. The anti-rotation mechanism 9 includes a guide sleeve 91, a pressure rod 92 and a third spring 93. Guide sleeves 91 are welded on both sides of the fixed claw 75, and pressure rods 92 are slidably connected in the guide sleeves 91. The third spring 93 is connected between the pressure rod 92 and the adjacent guide sleeves 91.

[0043] When the third spring 93 is reset, the guide sleeve 91 continues to move outwards and drives the pressure rod 92 to move outwards and disengage from the differential case 6. In this way, the differential case 6 can be stuck to avoid the fixed claw 75 from slipping due to the sprayed coolant when drilling.

[0044] like Figure 1 , Figure 2 , Fig. 9 and Fig.10 As shown, it also includes a fixing mechanism 11, which can further clamp the differential case 6. The fixing mechanism 11 includes a threaded disk 111, a second slide bar 112, a rack rack 113, a second gear 114, a rotating plate 115 and a fourth spring 116. The threaded disk 111 is keyed on the output shaft below the dual-axis motor 71, the second slide bar 112 is slidably connected to the middle part of the support frame 3, the second slide bar 112 is slidably connected to the threaded disk 111, the left part of the second slide bar 112 is slidably connected to the rack rack 113, and a fourth spring 116 is connected between the rack rack 113 and the second slide bar 112. The front and rear parts of the lower part of the support seat 4 are both rotatably connected to the rotating plate 115, the lower part of the rotating plate 115 is keyed to the second gear 114, and the second gear 114 is meshed with the rack rack 113.

[0045] When using the device, the output shaft of the dual-axis motor 71 rotates to drive the threaded disk 111 to rotate, and the threaded disk 111 rotates to push the second slide bar 112 to slide to the left, and the second slide bar 112 slides to the left to drive the rack frame 113 to move to the left, and the rack frame 113 moves to the left to drive the second gear 114 to rotate, and the second gear 114 rotates to drive the rotating plate 115 to rotate, and the rotating plate 115 rotates to clamp the outer side of the lower part of the differential case 6. After the rotating plate 115 clamps the differential case 6, the second slide bar 112 continues to slide to the left and will slide to the left on the rack frame 113, and the fourth spring 11 6 is deformed to buffer the extra travel of the second slide bar 112. When the drilling is completed, the output shaft of the dual-axis motor 71 reverses to drive the threaded disk 111 to reverse, and the threaded disk 111 reverses to drive the second slide bar 112 to slide to the right, and the fourth spring 116 is reset accordingly. After the fourth spring 116 is reset, the second slide bar 112 continues to slide to the right to drive the rack rack 113 to move to the right, and the rack rack 113 moves to the right to drive the second gear 114 to reverse, thereby causing the rotating plate 115 to reverse and release the differential case 6. In this way, the lower part of the differential case 6 can be clamped to reduce vibration and facilitate drilling.

[0046] like Figure 1 , Figure 2 , Fig.11 and Fig.12 As shown, it also includes a pressing mechanism 12, which can press down the differential housing 6. The pressing mechanism 12 includes a piston rod 121, a connecting frame 122 and a rotating arm 123. The piston rod 121 is slidably connected to the upper part of the first sliding rod 81, and the connecting frame 122 is welded to the top of the piston rod 121. The left and right parts of the connecting frame 122 are rotatably connected to the rotating arm 123, and the lower part of the rotating arm 123 is in contact with the sliding sleeve 85.

[0047] When the device is used, the first slide bar 81 slides downward to drive the entire pressing mechanism 12 to move downward. When the contact block 84 supports the lower inner wall of the differential case 6 so that the sleeve 85 stops moving downward, the first slide bar 81 continues to slide downward to continue to drive the pressing mechanism 12 to move downward. The rotating arm 123 continues to move downward and is squeezed by the sleeve 85 to rotate outward, and then stuck on the differential case 6. At this time, the first slide bar 81 continues to slide downward and slides downward on the piston rod 121, so that the cavity in the upper part of the first slide bar 81 is in a vacuum state, thereby causing the rotating arm 123 to press the differential case 6. When the drilling is completed, the first slide bar 81 slides upward to cause the rotating arm 123 to move upward and no longer press the differential case 6. When the rotating arm 123 moves upward until it is no longer squeezed by the sleeve 85, under the action of gravity, the rotating arm 123 rotates inward and resets, so that the differential case 6 can be pressed, further improving stability.

[0048] Although the present disclosure has been described with respect to only a limited number of embodiments, those skilled in the art having benefit of this disclosure will appreciate that various other embodiments can be devised without departing from the scope of the present invention. Accordingly, the scope of the present invention should be limited only by the appended claims.

Claims

1. A vertical processing drilling device for a differential housing, comprising a cross slide (1), a puncher (2), a support frame (3), a support seat (4) and a slide rail (5), wherein the puncher (2) is connected to the upper part of the cross slide (1), the support frame (3) is connected to the cross slide (1), the upper left part of the support frame (3) is connected to the support seat (4), and a plurality of slide rails (5) are equidistantly connected to the support seat (4), wherein: It also includes a positioning mechanism (7), an expansion mechanism (8) and an opening and closing mechanism (10); a positioning mechanism (7) for fixing the upper part of the differential housing (6) is provided between the slide rail (5) and the support frame (3); an expansion mechanism (8) for expanding and supporting the lower part of the differential housing (6) is provided at the lower part of the support seat (4); and an opening and closing mechanism (10) for automatically enabling the expansion mechanism (8) to support the differential housing (6) is provided between the positioning mechanism (7) and the support seat (4); The positioning mechanism (7) comprises a synchronous disk (74), a fixed claw (75) and a driving assembly. The upper part of the support seat (4) is rotatably connected to the synchronous disk (74). The sliding rail (5) is slidably connected to the fixed claw (75). The synchronous disk (74) rotates to squeeze the fixed claw (75) to move inwards and clamp the upper part of the differential housing (6). A driving assembly is provided between the support frame (3) and the synchronous disk (74). The driving assembly is used to drive the synchronous disk (74) to rotate. The driving assembly comprises a double-shaft motor (71), a first gear (72) and a sector gear (73); the right part of the support frame (3) is connected to the double-shaft motor (71); the output shaft above the double-shaft motor (71) is connected to the first gear (72); the right part of the synchronization disk (74) is connected to the sector gear (73); the sector gear (73) is meshed with the first gear (72); The expansion mechanism (8) comprises a first slide bar (81), a first spring (82), a connecting rod (83), a contact block (84), a sliding sleeve (85) and a second spring (86); the first slide bar (81) is slidably connected to the lower part of the support seat (4); the first spring (82) is connected between the first slide bar (81) and the support seat (4); the sliding sleeve (85) is slidably connected to the upper part of the first slide bar (81); the second spring (86) is connected between the sliding sleeve (85) and the first slide bar (81); a plurality of connecting rods (83) are rotatably connected to the sliding sleeve (85) at equal intervals; a plurality of connecting rods (83) are rotatably connected to the bottom of the support seat (4); the connection between the two adjacent upper and lower connecting rods (83) is rotatably connected to the contact block (84); the contact block (84) moves outward to fit the inner wall of the differential case (6), thereby supporting and fixing the differential case (6); The opening and closing mechanism (10) comprises a space cam (101), a sliding frame (102) and a guide rod (103); the output shaft below the double-axis motor (71) is connected to the space cam (101); the left part of the lower side of the support seat (4) is connected to the guide rod (103); the guide rod (103) is slidably connected to the sliding frame (102); the sliding frame (102) passes through the lower part of the first sliding rod (81); the right end of the sliding frame (102) is slidably connected to the space cam (101); the space cam (101) rotates so that the sliding frame (102) pulls the first sliding rod (81) to slide downward.

2. A vertical drilling device for a differential case according to claim 1, characterized in that: The invention also includes an anti-rotation mechanism (9) for preventing the differential housing (6) from rotating. The anti-rotation mechanism (9) includes a guide sleeve (91), a pressure rod (92) and a third spring (93). The guide sleeves (91) are connected to both sides of the fixed claw (75). The guide sleeves (91) are slidably connected to the inside of the guide sleeves (91). The pressure rod (92) moves inwards following the fixed claw (75) to further position the differential housing (6). The third spring (93) is connected between the pressure rod (92) and the adjacent guide sleeve (91).

3. A vertical drilling device for a differential case according to claim 2, characterized in that: The invention also includes a fixing mechanism (11) for further clamping the differential housing (6), the fixing mechanism (11) including a threaded disc (111), a second slide bar (112), a rack frame (113), a second gear (114), a rotating plate (115) and a fourth spring (116), the threaded disc (111) is connected to the output shaft below the dual-axis motor (71), the middle part of the support frame (3) is slidably connected to the second slide bar (112), the second slide bar (112) is slidably connected to the threaded disc (111), and the left part of the second slide bar (112) is slidably connected to the rack frame (113), A fourth spring (116) is connected between the rack frame (113) and the second slide bar (112); the front and rear parts of the lower part of the support seat (4) are both rotatably connected to a rotating plate (115); the lower part of the rotating plate (115) is connected to a second gear (114); the second gear (114) is meshed with the rack frame (113); the rack frame (113) moves leftward and cooperates with the second gear (114) to make the rotating plate (115) rotate inward to clamp the lower part of the differential housing (6).

4. A vertical drilling device for a differential case according to claim 3, characterized in that: The invention also comprises a pressing mechanism (12) for pressing down the differential housing (6), the pressing mechanism (12) comprising a piston rod (121), a connecting frame (122) and a rotating arm (123), the piston rod (121) is slidably connected to the upper inner portion of the first sliding rod (81), the connecting frame (122) is connected to the top of the piston rod (121), the left and right portions of the connecting frame (122) are both rotatably connected to the rotating arm (123), the lower portion of the rotating arm (123) is in contact with the sliding sleeve (85), the rotating arm (123) moves downward and is squeezed by the sliding sleeve (85) to rotate outward, and then is stuck on the differential housing (6), thereby pressing down the differential housing (6).

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