A differential automatic tightening device

Abstract

The application provides a differential automatic tightening device and relates to the technical field of intelligent manufacturing.The differential automatic tightening device is driven by a first lifting driving mechanism to move the clamping and overturning unit downward along the vertical direction, clamps the differential on the differential conveying line by the clamping and overturning unit, is driven by the first lifting driving mechanism to move the clamping and overturning unit upward along the vertical direction, lifts the differential upward, at the same time, is overturned by 180 degrees by the clamping and overturning unit, makes the differential assembly end face upward, is driven by a second lifting driving mechanism to move the tightening unit downward along the vertical direction, and is tightened by the tightening gun on the bolt of the differential assembly end.The whole process is automated, the labor intensity of the workers is reduced, and the work efficiency and work precision are greatly improved.In addition, the tightening unit can shoot the differential assembly end by the positioning camera, and adjust the positions of the two tightening guns and the distance between the two tightening guns, so as to adapt to different specifications of the differential.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent manufacturing, in particular to a differential automatic tightening device. BACKGROUND

[0002] In the differential automatic assembly production line, the bolts at the assembly end of the differential need to be tightened to realize the assembly of the differential. The posture of the differential on the conveying line is that the assembly end of the differential faces the conveying line, the differential needs to be manually taken off from the conveying line and placed on the assembly table by turning over so that the assembly end of the differential faces upward, and then the bolts are tightened by manual operation using a tightening tool. The whole operation process has high labor intensity and low operation efficiency, which also reduces the operation efficiency of the differential automatic assembly production line. SUMMARY

[0003] The present application aims to provide a differential automatic tightening device to realize automatic clamping, turning over and tightening of the bolts of the differential.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0005] A differential automatic tightening device, comprising a rack, a clamping and turning over unit, a first lifting driving mechanism, a tightening unit and a second lifting driving mechanism;

[0006] The clamping and turning over unit comprises a first support seat and a clamping and turning over mechanism arranged on the first support seat, and the clamping and turning over mechanism is used for clamping and turning over the differential;

[0007] The first support seat is slidingly connected to the rack and slides along the vertical direction relative to the rack;

[0008] The first lifting driving mechanism drives the first support seat to slide along the vertical direction relative to the rack;

[0009] The tightening unit comprises a second support seat and a tightening gun arranged on the second support seat, and the tightening gun is used for tightening the bolts at the assembly end of the differential;

[0010] The second support seat is slidingly connected to the rack and slides along the vertical direction relative to the rack;

[0011] The second lifting driving mechanism drives the second support seat to slide along the vertical direction relative to the rack.

[0012] Preferably, the clamping and overturning unit further comprises a left clamping seat, a right clamping seat, a limiting mechanism, a clamping driving mechanism, a left overturning seat, a right overturning seat, a telescopic mechanism, an overturning driving mechanism, a pressing claw and a pressing driving mechanism; the left clamping seat and the right clamping seat are slidably connected to the first supporting seat and slide relative to the first supporting seat along the horizontal direction; the limiting mechanism is arranged on the supporting seat and limits the left clamping seat and the right clamping seat; the clamping driving mechanism drives the left clamping seat and the right clamping seat to move close to or away from each other; the inner side of the left clamping seat is rotatably connected to the left overturning seat, and the inner side of the right clamping seat is rotatably connected to the right overturning seat; the telescopic mechanism has two ends that can extend or retract relative to each other, and the two ends of the telescopic mechanism are respectively connected to the left overturning seat and the right overturning seat; the overturning driving mechanism is arranged on the left clamping seat or the right clamping seat and drives the left overturning seat, the right overturning seat and the telescopic mechanism to rotate; the pressing claw and the pressing driving mechanism are arranged on the left overturning seat and the right overturning seat, and the pressing driving mechanism drives the pressing claw on the left overturning seat to move close to or away from the left overturning seat and drives the pressing claw on the right overturning seat to move close to or away from the right overturning seat.

[0013] Preferably, the limiting mechanism is a limiting cylinder, and the left side and the right side of the first supporting seat are both provided with the limiting cylinder. The telescopic end of the limiting cylinder on the left side of the first supporting seat can abut against the left clamping seat, and the telescopic end of the limiting cylinder on the right side of the first supporting seat can abut against the right clamping seat.

[0014] Preferably, the clamping driving mechanism is a clamping cylinder, and the two ends of the clamping cylinder are respectively connected to the left clamping seat and the right clamping seat.

[0015] Preferably, the telescopic mechanism comprises a sleeve and a sliding rod, the sliding rod is slidably connected to the inside of the sleeve, the end of the sleeve is connected to the left overturning seat, and the end of the sliding rod is connected to the right overturning seat.

[0016] Preferably, the overturning driving mechanism is an overturning cylinder, the cylinder body end of the overturning cylinder is arranged on the left clamping seat, and the rotating end of the overturning cylinder is connected to the left overturning seat.

[0017] Preferably, the pressing driving mechanism comprises a pressing cylinder and a supporting rod; the cylinder body end of the pressing cylinder is connected to the left overturning seat, one end of the supporting rod is hinged to the left overturning seat, the inner end of the pressing claw is hinged to the telescopic end of the pressing cylinder, and the middle position of the pressing claw is hinged to the other end of the supporting rod; the cylinder body end of the pressing cylinder is connected to the right overturning seat, one end of the supporting rod is hinged to the right overturning seat, the inner end of the pressing claw is hinged to the telescopic end of the pressing cylinder, and the middle position of the pressing claw is hinged to the other end of the supporting rod.

[0018] Preferably, the tightening unit further comprises a rotary support, a rotary table, a rotary servo motor, a driving gear, a tightening sliding seat, a bidirectional screw rod and a variable-distance servo motor.

[0019] The fixed end of the slewing bearing is arranged on the second support base, the rotating end of the slewing bearing is arranged on the slewing table, and the rotating end of the slewing bearing is provided with a gear ring.

[0020] The slewing servo motor is arranged on the second support base, the output rotating shaft of the slewing servo motor is provided with the driving gear, and the driving gear is engaged with the gear ring.

[0021] Two tightening sliding seats are slidingly connected to the slewing table and slide along the horizontal direction relative to the slewing table.

[0022] The bidirectional screw rod is rotationally connected to the slewing table, the left side of the bidirectional screw rod is provided with a left-hand thread, the left side of the bidirectional screw rod is matched with a left-hand nut, the right side of the bidirectional screw rod is provided with a right-hand thread, and the right side of the bidirectional screw rod is matched with a right-hand nut.

[0023] The left-hand nut is fixedly connected to one of the tightening sliding seats, and the right-hand nut is fixedly connected to the other tightening sliding seat.

[0024] One tightening gun is arranged on each of the tightening sliding seats.

[0025] The variable-distance servo motor is arranged on the slewing table, and the output rotating shaft of the variable-distance servo motor is drivingly connected to the bidirectional screw rod to drive the bidirectional screw rod to rotate.

[0026] The output rotating shaft of the variable-distance servo motor rotates in the forward direction or the reverse direction to drive the bidirectional screw rod to rotate in the forward direction or the reverse direction, thereby driving the left-hand nut and the right-hand nut to move closer to or farther away from each other.

[0027] Preferably, a positioning camera is arranged on the second support base, and a shooting end of the positioning camera faces the position of the clamping and overturning unit.

[0028] Preferably, the first lifting driving mechanism comprises a first lifting servo motor, a first lifting screw rod and a first lifting nut, the first lifting servo motor is arranged on the rack, the output rotating shaft of the first lifting servo motor is connected to the first lifting screw rod, the first lifting screw rod is arranged along the vertical direction, the first lifting screw rod is matched with the first lifting nut, and the first lifting nut is fixedly connected to the first support base.

[0029] The second lifting driving mechanism comprises a second lifting servo motor, a second lifting screw rod and a second lifting nut, the second lifting servo motor is arranged on the rack, the output rotating shaft of the second lifting servo motor is connected to the second lifting screw rod, the second lifting screw rod is arranged along the vertical direction, the second lifting screw rod is matched with the second lifting nut, and the second lifting nut is fixedly connected to the second support base.

[0030] The beneficial technical effects of the present application are:

[0031] The differential automatic tightening device of the present application is driven by the first lifting driving mechanism to move the clamping and overturning unit downward along the vertical direction, clamps the differential on the differential conveying line by the clamping and overturning unit, is driven by the first lifting driving mechanism to move the clamping and overturning unit upward along the vertical direction to lift the differential upward, at the same time, overturns the differential by 180° by the clamping and overturning unit to make the differential assembly end face upward, then is driven by the second lifting driving mechanism to move the tightening unit downward along the vertical direction, and the bolt of the differential assembly end is tightened by the tightening gun; the above-mentioned whole process realizes automation, reduces the labor intensity of the operating personnel, and greatly improves the operating efficiency and operating precision. In addition, the tightening unit can shoot the differential assembly end by the positioning camera, and adjust the position and the spacing between the two tightening guns to adapt to different specifications of the differential. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a perspective view of the differential automatic tightening device in the embodiment of the present application Figure One ;

[0033] Figure 2 is a perspective view of the differential automatic tightening device in the embodiment of the present application Figure Two ;

[0034] Figure 3 is a front view of the differential automatic tightening device in the embodiment of the present application

[0035] Figure 4 is a side view of the differential automatic tightening device in the embodiment of the present application

[0036] Figure 5 is a top view of the differential automatic tightening device in the embodiment of the present application

[0037] Figure 6 is a perspective view of the clamping and overturning unit in the embodiment of the present application Figure One ;

[0038] Figure 7 is a perspective view of the clamping and overturning unit in the embodiment of the present application Figure Two ;

[0039] Figure 8 is a front view of the clamping and overturning unit in the embodiment of the present application

[0040] Figure 9 is a top view of the clamping and overturning unit in the embodiment of the present application

[0041] Figure 10 is a perspective view of the tightening unit in the embodiment of the present application Figure One ;

[0042] Figure 11 A perspective view of the tightening unit in an embodiment of the present application Figure Two ;

[0043] Figure 12 A front view of the tightening unit in an embodiment of the present application

[0044] Figure 13 A top view of the tightening unit in an embodiment of the present application

[0045] Figure 14 A perspective view of the positioning camera part in an embodiment of the present application

[0046] Figure 15 A front view of the positioning camera part in an embodiment of the present application

[0047] Figure 16 A top view of the positioning camera part in an embodiment of the present application DETAILED DESCRIPTION

[0048] In order to make the objectives, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings. Some but not all of the embodiments of the present application will be shown in the drawings, which are described more fully below. In fact, various embodiments of the present application can be implemented in many different forms, and should not be interpreted as being limited to the embodiments described herein; on the contrary, these embodiments are provided to meet the applicable legal requirements.

[0049] In the description of the present application, it should be noted that the terms "inner", "outer", "upper", "lower", "front", "back" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as limiting the present application. In addition, the terms "first" and "second" are only for descriptive purposes and should not be understood as indicating or implying relative importance.

[0050] In an embodiment of the present application, an automatic differential tightening device is provided, as shown in Figures 1 to 16 .

[0051] An automatic differential tightening device, comprising a rack 1, a clamping and overturning unit 2, a first lifting driving mechanism, a tightening unit 3 and a second lifting driving mechanism, etc.

[0052] The rack 1 is arranged on one side of a differential transmission conveying line 4, and a tray 41 for placing the differential transmission 5 is conveyed on the differential transmission conveying line 4. The differential transmission 5 is in a posture on the differential transmission conveying line 4, in which the assembly end of the differential transmission 5 faces downwardly to the differential transmission conveying line 4.

[0053] The clamping and overturning unit 2 comprises a first support base 201 and a clamping and overturning mechanism arranged on the first support base 201, and the clamping and overturning mechanism is used for clamping and overturning the differential transmission 5.

[0054] The first support base 201 is slidingly connected to the rack 1 and slides along the vertical direction relative to the rack 1. The rack 1 is provided with a vertical sliding rail 11 along the vertical direction, and the first support base 201 is provided with a first vertical sliding block 12 which slidingly cooperates with the vertical sliding rail 11.

[0055] The first lifting driving mechanism drives the first support base 201 to slide along the vertical direction relative to the rack 1.

[0056] The first lifting driving mechanism comprises a first lifting servo motor 611, a first lifting screw rod 612 and a first lifting screw nut 613. The first lifting servo motor 611 is arranged on the rack 1, the output shaft of the first lifting servo motor 611 is connected to the first lifting screw rod 612, the first lifting screw rod 612 is arranged along the vertical direction, the first lifting screw rod 612 is cooperated with the first lifting screw nut 613, and the first lifting screw nut 613 is fixedly connected to the first support base 201. The output shaft of the first lifting servo motor 611 is rotated to drive the first lifting screw rod 612 to rotate, and then the first lifting screw nut 613 drives the first support base 201 to slide along the vertical direction relative to the rack 1.

[0057] The tightening unit 3 comprises a second support base 301 and a tightening gun 3061 arranged on the second support base 301, and the tightening gun 3061 is used for tightening the bolt at the assembly end of the differential transmission 5.

[0058] The second support base 301 is slidingly connected to the rack 1 and slides along the vertical direction relative to the rack 1. The second support base 301 is provided with a second vertical sliding block 13 which slidingly cooperates with the vertical sliding rail 11.

[0059] The second lifting driving mechanism drives the second support base 301 to slide along the vertical direction relative to the rack 1.

[0060] The second lifting driving mechanism comprises a second lifting servo motor 621, a second lifting screw rod 622 and a second lifting screw nut 623. The second lifting servo motor 621 is arranged on the rack 1. The output rotating shaft of the second lifting servo motor 621 is connected with the second lifting screw rod 622. The second lifting screw rod 622 is arranged along the vertical direction. The second lifting screw rod 622 is matched with the second lifting screw nut 623. The second lifting screw nut 623 is fixedly connected with the second support base 301. The output rotating shaft of the second lifting servo motor 621 is rotated to drive the second lifting screw rod 622 to rotate. Then, the second lifting screw nut 623 drives the second support base 301 to slide along the vertical direction relative to the rack 1.

[0061] The clamping and overturning unit further comprises a left clamping seat 2021, a right clamping seat 2022, a limiting mechanism, a clamping driving mechanism, a left overturning seat 2031, a right overturning seat 2032, a telescopic mechanism, an overturning driving mechanism, a pressing jaw 204 and a pressing driving mechanism.

[0062] The left clamping seat 2021 and the right clamping seat 2022 are both slidingly connected with the first support base 201 and slide along the horizontal direction relative to the first support base 201. Specifically, the first support base 201 is provided with a first horizontal sliding rail 2011 along the horizontal direction. The left clamping seat 2021 and the right clamping seat 2022 are provided with first horizontal sliding blocks 2012. The first horizontal sliding blocks 2012 slidingly fit the first horizontal sliding rail 2011.

[0063] The first support base 201 is provided with a limiting mechanism. The limiting mechanism limits the left clamping seat 2021 and the right clamping seat 2022. Specifically, the limiting mechanism is a limiting cylinder 2051. The left side of the first support base 201 is connected with the cylinder body end of the limiting cylinder 2051. The right side of the first support base 201 is connected with the cylinder body end of the limiting cylinder 2051. The telescopic end of the limiting cylinder 2051 on the left side of the first support base 201 can abut against the left clamping seat 2021. The telescopic end of the limiting cylinder 2051 on the right side of the first support base 201 can abut against the right clamping seat 2022. After the left clamping seat 2021 and the right clamping seat 2022 are close to or away from each other to a set position, the telescopic end of the limiting cylinder 2051 on the left side of the first support base 201 is extended relative to the cylinder body end to abut against the left clamping seat 2021. The telescopic end of the limiting cylinder 2051 on the right side of the first support base 201 is extended relative to the cylinder body end to abut against the right clamping seat 2022. Thus, the left clamping seat 2021 and the right clamping seat 2022 are prevented from sliding relative to the first support base 201.

[0064] The clamping driving mechanism drives the left clamping seat 2021 and the right clamping seat 2022 to move close to or away from each other. Specifically, the clamping driving mechanism is a clamping cylinder 2052, and the two ends of the clamping cylinder 2052 are connected to the left clamping seat 2021 and the right clamping seat 2022 respectively. The extension end of the clamping cylinder 2052 extends or retracts relative to the cylinder body end, so as to drive the left clamping seat 2021 and the right clamping seat 2022 to move close to or away from each other.

[0065] The inner side of the left clamping seat 2021 is rotationally connected to the left turnover seat 2031, and the inner side of the right clamping seat 2022 is rotationally connected to the right turnover seat 2032.

[0066] The two ends of the telescopic mechanism can extend or retract relative to each other, and the two ends of the telescopic mechanism are connected to the left turnover seat 2031 and the right turnover seat 2032 respectively. Specifically, the telescopic mechanism includes a sleeve 2061 and a sliding rod 2062, the sliding rod 2062 is slidingly connected inside the sleeve 2061, the end of the sleeve 2061 is connected to the left turnover seat 2031, and the end of the sliding rod 2062 is connected to the right turnover seat 2032.

[0067] The turnover driving mechanism is arranged on the left clamping seat 2021, and drives the left turnover seat 2031, the right turnover seat 2032 and the telescopic mechanism to rotate. Specifically, the turnover driving mechanism is a turnover cylinder 2053, the cylinder body end of the turnover cylinder 2053 is arranged on the left clamping seat 2021, and the rotating end of the turnover cylinder 2053 is connected to the left turnover seat 2031. The rotating end of the turnover cylinder 2053 rotates relative to the cylinder body end, thereby driving the left turnover seat 2031 to rotate, and the left turnover seat 2031 drives the right turnover seat 2032 to rotate through the telescopic mechanism.

[0068] The clamping driving mechanism drives the left clamping seat 2021 and the right clamping seat 2022 to move close to or away from each other, thereby driving the left turnover seat 31 and the right turnover seat 32 to move close to and abut the differential from the left and right ends. During the process that the clamping driving mechanism drives the left clamping seat 2021 and the right clamping seat 2022 to move close to or away from each other, the two ends of the telescopic mechanism retract or extend relative to each other. At the same time, during the process that the turnover cylinder 2053 drives the left turnover seat 2031 to rotate, the left turnover seat 2031 drives the right turnover seat 2032 to rotate through the telescopic mechanism.

[0069] The left turnover seat 2031 and the right turnover seat 2032 are both provided with a pressing claw 204 and a pressing driving mechanism, the pressing driving mechanism drives the pressing claw 204 on the left turnover seat 2031 to move close to or away from the left turnover seat 2031, and drives the pressing claw 204 on the right turnover seat 2032 to move close to or away from the right turnover seat 2032.

[0070] Specifically, the pressing driving mechanism comprises a pressing cylinder 2071 and a supporting rod 2072; the left overturning seat 2031 is connected to the cylinder end of the pressing cylinder 2071, one end of the supporting rod 2072 is hinged to the left overturning seat 2031, the inner end of the pressing jaw 204 is hinged to the telescopic end of the pressing cylinder 2071, and the middle position of the pressing jaw 204 is hinged to the other end of the supporting rod 2072; the right overturning seat 2032 is connected to the cylinder end of the pressing cylinder 2071, one end of the supporting rod 2072 is hinged to the right overturning seat 2032, the inner end of the pressing jaw 204 is hinged to the telescopic end of the pressing cylinder 2071, and the middle position of the pressing jaw 204 is hinged to the other end of the supporting rod 2072. The telescopic end of the pressing cylinder 2071 on the left overturning seat 2031 extends upward relative to the cylinder end, so as to drive the inner end of the pressing jaw 204 to lift upward, and the outer end of the pressing jaw 204 approaches the left overturning seat 2032 downward, so that the pressing jaw 204 and the left overturning seat 2031 jointly clamp the upper and lower sides of the left end of the differential. The telescopic end of the pressing cylinder 2071 on the right overturning seat 2032 extends upward relative to the cylinder end, so as to drive the inner end of the pressing jaw 204 to lift upward, and the outer end of the pressing jaw 204 approaches the right overturning seat 2032 downward, so that the pressing jaw 204 and the right overturning seat 2032 jointly clamp the upper and lower sides of the right end of the differential.

[0071] The tightening unit 3 further comprises a slewing bearing 302, a slewing table 303, a slewing servo motor 304, a driving gear 305, a tightening sliding seat 306, a bidirectional screw rod 307 and a variable-distance servo motor 308.

[0072] The fixed end of the slewing bearing 302 is arranged on the second support base 301, the rotating end of the slewing bearing 302 is arranged with the slewing table 303, and the rotating end of the slewing bearing 302 is arranged with a gear ring 3021. The slewing servo motor 304 is arranged on the second support base 301, the output rotating shaft of the slewing servo motor 304 is arranged with the driving gear 305, and the driving gear 305 is engaged with the gear ring 3021.

[0073] The two tightening sliding seats 306 are slidingly connected to the slewing table 303 and slide along the horizontal direction relative to the slewing table 303. Specifically, the second horizontal sliding rail 3031 is arranged on the slewing table 303 along the horizontal direction, and the second horizontal sliding block 3062 is arranged on the tightening sliding seat 306 and slidingly matches the second horizontal sliding rail 3031.

[0074] The bearing seat 3032 is arranged on the slewing table 303, and the two ends of the bidirectional screw rod 307 are rotatably connected to the bearing seat 3032. The left side of the bidirectional screw rod 307 is arranged with a left-hand thread, the left side of the bidirectional screw rod 307 is matched with the left-hand threaded nut 3091, the right side of the bidirectional screw rod 307 is arranged with a right-hand thread, and the right side of the bidirectional screw rod 307 is matched with the right-hand threaded nut 3092.

[0075] The left-handed nut 3091 is fixedly connected with one tightening slide 306, and the right-handed nut 3092 is fixedly connected with another tightening slide 306.

[0076] Each tightening slide 306 is provided with a tightening gun 3061.

[0077] The variable-pitch servo motor 308 is arranged on the rotary table 303, and the output shaft of the variable-pitch servo motor 308 is provided with a first pulley 3081. One end of the bidirectional screw rod 307 is provided with a second pulley 3082, and the first pulley 3081 is connected with the second pulley 3082 through a transmission belt 3083. The output shaft of the variable-pitch servo motor 308 rotates to drive the bidirectional screw rod 307 to rotate through the first pulley 3081, the transmission belt 3083 and the second pulley 3082. The output shaft of the variable-pitch servo motor 308 rotates forward or reversely to drive the bidirectional screw rod 307 to rotate forward or reversely, thereby driving the left-handed nut 3091 and the right-handed nut 3092 to move close to or away from each other.

[0078] The output shaft of the rotary servo motor 304 rotates to drive the driving gear 305 to rotate, thereby driving the rotary end of the rotary bearing 302 and the rotary table 303 to rotate through the gear ring 3021. In this way, the tightening gun 3061 is driven to rotate in the circumferential direction through the rotary table 303 and the tightening slide 306, so as to adjust the position of the tightening gun 3061 in the circumferential direction.

[0079] The output shaft of the variable-pitch servo motor 308 rotates to drive the bidirectional screw rod 307 to rotate through the first pulley 3081, the transmission belt 3083 and the second pulley 3082. The output shaft of the variable-pitch servo motor 308 rotates forward or reversely to drive the bidirectional screw rod 307 to rotate forward or reversely, and the bidirectional screw rod 307 rotates forward or reversely to drive the left-handed nut 3091 and the right-handed nut 3092 to move close to or away from each other, thereby driving the two tightening slides 306 to move close to or away from each other. The two tightening slides 306 drive the two tightening guns 3061 to move close to or away from each other, so as to adjust the distance between the two tightening guns 3061.

[0080] The position of the tightening gun 3061 in the circumferential direction and the distance between the two tightening guns 3061 are adjusted to adapt to different specifications of the differential 5.

[0081] The second support seat 301 is provided with a camera support 3011, and a positioning camera 3012 is arranged at the middle position of the camera support 3011. Light sources 3013 are arranged around the camera support 3011, and the shooting end of the positioning camera 3012 faces the position of the clamping and overturning unit 2, so that the positioning camera 3012 shoots the assembly end of the differential 5. The positioning camera 3012 is connected with a control unit through a signal cable, and the control unit judges the specification of the differential 5.

[0082] So far, the present embodiment has been described in detail in combination with the drawings. According to the above description, those skilled in the art should have a clear understanding of the differential automatic tightening device of the present application. The differential automatic tightening device of the present application is driven by the first lifting driving mechanism to move the clamping and overturning unit 2 downward along the vertical direction, clamps the differential 5 on the differential conveying line 4 by the clamping and overturning unit 2, is driven by the first lifting driving mechanism to move the clamping and overturning unit 2 upward along the vertical direction to lift the differential 5 upward, at the same time, the differential 5 is overturned by 180° by the clamping and overturning unit 2 to make the differential 5 assembly end face upward, then the tightening unit 3 is driven by the second lifting driving mechanism to move downward along the vertical direction, and the bolts of the differential 5 assembly end are tightened by the tightening gun 3061. The above whole process realizes automation, reduces the labor intensity of the workers, and greatly improves the work efficiency and work precision. In addition, the tightening unit 3 can shoot the differential 5 assembly end by the positioning camera 3012, and adjust the position of the two tightening guns 3061 and the distance therebetween to adapt to different specifications of the differential 5.

[0083] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only for specific embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A differential automatic tightening apparatus characterized by: The rack, the clamping and overturning unit, the first lifting driving mechanism, the tightening unit and the second lifting driving mechanism are included. The clamping and overturning unit includes a first support base and a clamping and overturning mechanism arranged on the first support base, and the clamping and overturning mechanism is used for clamping and overturning the differential. The first support base is slidably connected to the rack and slides along the vertical direction relative to the rack. The first lifting driving mechanism drives the first support base to slide along the vertical direction relative to the rack. The tightening unit includes a second support base and a tightening gun arranged on the second support base, and the tightening gun is used for tightening the bolt at the assembly end of the differential. The second support base is slidably connected to the rack and slides along the vertical direction relative to the rack. The second lifting driving mechanism drives the second support base to slide along the vertical direction relative to the rack. The tightening unit further includes a slewing bearing, a slewing table, a slewing servo motor, a driving gear, a tightening sliding seat, a bidirectional screw rod and a variable-distance servo motor. The fixed end of the slewing bearing is arranged on the second support base, the rotating end of the slewing bearing is arranged on the slewing table, and the rotating end of the slewing bearing is provided with a gear ring. The slewing servo motor is arranged on the second support base, the output shaft of the slewing servo motor is provided with the driving gear, and the driving gear is engaged with the gear ring. Two tightening sliding seats are slidably connected to the slewing table and slide along the horizontal direction relative to the slewing table. The bidirectional screw rod is rotatably connected to the slewing table, the left side of the bidirectional screw rod is provided with a left-hand thread, the left side of the bidirectional screw rod is matched with a left-hand nut, the right side of the bidirectional screw rod is provided with a right-hand thread, and the right side of the bidirectional screw rod is matched with a right-hand nut. The left-hand nut is fixedly connected to one of the tightening sliding seats, and the right-hand nut is fixedly connected to the other tightening sliding seat. One tightening gun is arranged on each of the tightening sliding seats. The variable-distance servo motor is arranged on the slewing table, and the output shaft of the variable-distance servo motor is drivingly connected to the bidirectional screw rod to drive the bidirectional screw rod to rotate. The output shaft of the variable-distance servo motor rotates forward or reversely to drive the bidirectional screw rod to rotate forward or reversely, so as to drive the left-hand nut and the right-hand nut to move close to or away from each other.

2. The differential automatic tightening device according to claim 1, characterized in that: The clamping and overturning unit further comprises a left clamping seat, a right clamping seat, a limiting mechanism, a clamping driving mechanism, a left overturning seat, a right overturning seat, a telescopic mechanism, an overturning driving mechanism, a pressing claw and a pressing driving mechanism; the left clamping seat and the right clamping seat are slidably connected to the first supporting seat and slide relative to the first supporting seat along the horizontal direction; the supporting seat is provided with the limiting mechanism, which limits the left clamping seat and the right clamping seat; the clamping driving mechanism drives the left clamping seat and the right clamping seat to move close to or away from each other; the inner side of the left clamping seat is rotatably connected to the left overturning seat, and the inner side of the right clamping seat is rotatably connected to the right overturning seat; the two ends of the telescopic mechanism can be extended or retracted relative to each other, and the two ends of the telescopic mechanism are respectively connected to the left overturning seat and the right overturning seat; the overturning driving mechanism is arranged on the left clamping seat or the right clamping seat, and drives the left overturning seat, the right overturning seat and the telescopic mechanism to rotate; the left overturning seat and the right overturning seat are both provided with the pressing claw and the pressing driving mechanism, and the pressing driving mechanism drives the pressing claw on the left overturning seat to move close to or away from the left overturning seat, and drives the pressing claw on the right overturning seat to move close to or away from the right overturning seat.

3. The automatic tightening device for differential according to claim 2, characterized in that: the limiting mechanism is a limiting cylinder, and the left side and the right side of the first supporting seat are both provided with the limiting cylinder, the telescopic end of the limiting cylinder on the left side of the first supporting seat can abut against the left clamping seat, and the telescopic end of the limiting cylinder on the right side of the first supporting seat can abut against the right clamping seat.

4. The automatic tightening device for differential according to claim 2, characterized in that: the clamping driving mechanism is a clamping cylinder, and the two ends of the clamping cylinder are respectively connected to the left clamping seat and the right clamping seat.

5. The automatic tightening device for differential according to claim 2, characterized in that: the telescopic mechanism comprises a sleeve and a sliding rod, the sliding rod is slidably connected to the inside of the sleeve, the end of the sleeve is connected to the left overturning seat, and the end of the sliding rod is connected to the right overturning seat.

6. The automatic tightening device for differential according to claim 2, characterized in that: the overturning driving mechanism is an overturning cylinder, the cylinder body end of the overturning cylinder is arranged on the left clamping seat, and the rotating end of the overturning cylinder is connected to the left overturning seat.

7. The automatic tightening device for differential according to claim 2, characterized in that: the pressing driving mechanism comprises a pressing cylinder and a supporting rod; the cylinder body end of the pressing cylinder is connected to the left overturning seat, one end of the supporting rod is hinged to the left overturning seat, the inner end of the pressing claw is hinged to the telescopic end of the pressing cylinder, and the middle position of the pressing claw is hinged to the other end of the supporting rod; the cylinder body end of the pressing cylinder is connected to the right overturning seat, one end of the supporting rod is hinged to the right overturning seat, the inner end of the pressing claw is hinged to the telescopic end of the pressing cylinder, and the middle position of the pressing claw is hinged to the other end of the supporting rod.

8. The automatic tightening device for differential according to claim 1, characterized in that: the second supporting seat is provided with a positioning camera, and the shooting end of the positioning camera faces the position of the clamping and overturning unit.

9. The differential automatic tightening device according to claim 1, characterized in that: The first lifting driving mechanism comprises a first lifting servo motor, a first lifting screw rod and a first lifting screw nut, the first lifting servo motor is arranged on the frame, the output shaft of the first lifting servo motor is connected with the first lifting screw rod, the first lifting screw rod is arranged along the vertical direction, the first lifting screw nut is matched on the first lifting screw rod, and the first lifting screw nut is fixedly connected with the first supporting seat. The second lifting driving mechanism comprises a second lifting servo motor, a second lifting screw rod and a second lifting screw nut, the second lifting servo motor is arranged on the frame, the output shaft of the second lifting servo motor is connected with the second lifting screw rod, the second lifting screw rod is arranged along the vertical direction, the second lifting screw nut is matched on the second lifting screw rod, and the second lifting screw nut is fixedly connected with the second supporting seat.

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