Automatic motor assembling production line

Abstract

The invention belongs to the technical field of motor assembly, and particularly relates to an automatic motor assembly production line which comprises a conveying mechanism, a feeding mechanism, a discharging mechanism, a bolt mounting mechanism, a bolt supply mechanism and a jacking mechanism. The feeding mechanism is used for feeding workpieces; the discharging mechanism is used for working discharging. The bolt mounting mechanism comprises a rack, a machine head and a cantilever connected with the rack and the machine head, a rotating assembly used for driving the cantilever to rotate and a lifting assembly used for lifting are arranged on the rack, and a plurality of screwing assemblies corresponding to bolt mounting positions on a workpiece are arranged on the machine head; the bolt supply mechanism is used for supplying bolts; the jacking mechanism is used for jacking a workpiece during bolt installation; a workpiece is jacked up through the jacking mechanism, then a plurality of bolts are installed and screwed at the same time through a plurality of screwing assemblies on the bolt installation mechanism, the production efficiency is effectively improved, the stress uniformity of the installed bolts is guaranteed, the installation quality is improved, automatic assembly is achieved, and time and labor are saved.

Description

Technical Field

[0001] The invention belongs to the technical field of motor assembly, and in particular relates to an automatic motor assembly production line. Background Art

[0002] A motor is a device that converts electrical energy into mechanical energy. It mainly includes a casing, a stator installed in the casing, a rotor, a front cover and a rear cover. During the installation of the front cover and the rear cover, bolt connection is one of the more common connection methods in assembly.

[0003] In traditional motor assembly production lines, the front cover and the rear cover are mostly installed manually by bolting, which is time-consuming and labor-intensive. Some are done by using a manipulator in conjunction with an electric screwdriver, but they can only tighten and install a single bolt at a time, which can easily cause inconsistent force conditions on multiple bolts after they are tightened. Although this effect can be mitigated by tightening them diagonally, a single bolt is usually tightened directly into place at a time. Therefore, there is still an impact on the uniformity of the bolt force, which affects the installation quality, and the efficiency of tightening a single bolt at a time needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic motor assembly production line to solve the above-mentioned technical problems, so as to achieve the effect of tightening multiple bolts at the same time, improving installation quality and increasing production efficiency.

[0005] In view of this, the present invention provides a motor automatic assembly production line, comprising:

[0006] The conveying mechanism includes a first circulating conveyor belt and a second circulating conveyor belt, and is respectively used for conveying workpieces when installing the front cover and the rear cover of the motor housing;

[0007] The feeding mechanism is located on the side of the conveying mechanism and includes a feeding conveyor belt and a feeding manipulator, and is used for feeding the workpiece;

[0008] The unloading mechanism is located on the side of the conveying mechanism and includes an unloading conveyor belt and an unloading manipulator, and is used for unloading work;

[0009] The bolt installation mechanism comprises a frame, a machine head and a cantilever connecting the frame and the machine head, and the frame is provided with a rotating assembly for driving the cantilever to rotate and a lifting assembly for lifting, and the machine head is provided with a plurality of tightening assemblies corresponding to the bolt installation positions on the workpiece;

[0010] a bolt supply mechanism, located at a side of the bolt installation mechanism and used for supplying bolts to the bolt installation mechanism;

[0011] The lifting mechanism is installed in the conveying mechanism and is used to lift the workpiece when installing the bolts.

[0012] In the above technical solution, further, the head includes:

[0013] A first housing is mounted on an end of the cantilever away from the frame;

[0014] A drive assembly is installed in the first housing and includes a drive motor and a drive gear installed at an output end of the drive motor;

[0015] The pressure plate is installed on one side of the first housing and located at the tightening assembly, and a first elastic member is arranged between the pressure plate and the first housing, and a circular hole is opened for the tightening assembly to pass through;

[0016] A pressing block is mounted on a side of the pressing plate away from the first shell;

[0017] The clamping assembly is installed on one side of the pressing plate located on the pressing block, and the output end is arranged corresponding to the circular hole.

[0018] In the above technical solution, further, the tightening assembly includes:

[0019] A second housing is installed in the first housing;

[0020] The main body is installed in the second housing, and one end of the main body extends out of the first housing toward the circular hole and is installed with a screwdriver head, and the other end of the main body extends out of the second housing toward the inside of the first housing and is installed with an input gear meshing with the driving gear;

[0021] An axial compensation structure is installed between the main body and the screwdriver head and is used to compensate for the movement of the screwdriver head in the axial direction;

[0022] The radial compensation structure is installed between the main body and the screwdriver head and is used for radial rotation compensation of the screwdriver head;

[0023] The clutch mechanism is installed between the main body and the input gear and is used to prevent the screwdriver head from being over-tightened.

[0024] In the above technical solution, further, the axial compensation structure includes:

[0025] A first column is connected to one axial side of the main body and has a sliding chamber formed inside;

[0026] A second column is axially slidably connected to one side of the first column, and one end of the second column extends into the sliding chamber for sliding connection;

[0027] A first limiting protrusion is arranged on the inner wall of the sliding chamber in parallel with the axial direction, and a limiting groove matching the first limiting protrusion is formed on one end surface of the second column located in the sliding chamber;

[0028] The second elastic member is sleeved on the second column and is used for resetting the second column after the second column moves axially along the sliding chamber.

[0029] In the above technical solution, further, the radial compensation structure includes:

[0030] A third column is mounted on an end of the second column away from the first column, and an end away from the main body is provided with a mounting hole for mounting a screwdriver head;

[0031] A ratchet wheel connected to an end of the second cylinder away from the first cylinder;

[0032] A pawl is mounted on the third column and is arranged corresponding to the ratchet wheel;

[0033] The connecting cover is sleeved on the second column, fixed on one end of the third column, and rotatably connected with the second column.

[0034] In the above technical solution, further, the clutch mechanism includes:

[0035] The barrel is mounted on a side of the main body away from the screwdriver head and has a plurality of teeth on the inner wall;

[0036] An input shaft, one end of which is connected to the input gear and the other end of which is provided with a sun gear;

[0037] A plurality of planetary gears are arranged at equal intervals around the circumference of the sun gear and mesh with the sun gear and the teeth;

[0038] The planetary disc, the bearing is connected to the inner wall of the cylinder, and is provided with a plurality of shafts for mounting the planetary gears;

[0039] The overload protection structure is sleeved on the main body and is used to hinder the rotation of the cylinder.

[0040] The main body is connected to the planetary disk and rotates synchronously with the planetary disk.

[0041] In the above technical solution, further, the overload protection structure includes:

[0042] A bracket, sleeved on the main body;

[0043] A second limiting protrusion is arranged at one end of the cylinder;

[0044] A third elastic member is mounted on the bracket, and one end of the third elastic member is provided with a top bead abutting against the cylinder, and the other end abutting against the bracket;

[0045] The top ball hinders the rotation of the cylinder by abutting against the second limiting protrusion.

[0046] In the above technical solution, further, the overload protection structure also includes:

[0047] The metal sheet is sleeved on the main body and is provided with a conical hole adapted to the top bead, and the second limiting protrusion is made of a non-conductive material;

[0048] A power supply and a current sensor are also provided, and the power supply, the current sensor, the metal sheet and the top bead are connected in series in a closed-loop circuit.

[0049] In the above technical solution, further, the bracket includes:

[0050] A fixing part, two ends of which are respectively connected to the first shell and the metal sheet;

[0051] The adjusting part is sleeved on the fixing part and is threadedly connected to the fixing part, and is used to adjust the deformation amount of the third elastic member;

[0052] The toggle part is sleeved on the adjusting part and is rotatably connected to the second housing, and a slide groove is axially provided on the inner wall;

[0053] The third limiting protrusion is arranged on the surface of the adjusting portion and is slidably connected with the sliding groove.

[0054] In the above technical solution, further, it also includes:

[0055] A tray, located on the first circulating conveyor belt and the second circulating conveyor belt, and used for placing workpieces;

[0056] Wherein, the first circulating conveyor belt and the second circulating conveyor belt each include two parallel conveyor belts, and both ends of the pallet are placed on the conveyor belts, and the lifting mechanism is located between the two parallel conveyor belts and is used to lift the pallet.

[0057] The beneficial effects of the present invention are:

[0058] 1. The workpiece is lifted up by the lifting mechanism, and then the multiple tightening components on the bolt installation mechanism install and tighten multiple bolts at the same time, which effectively improves the production efficiency. Multiple bolts are tightened at the same time, which effectively ensures the force uniformity of the installed bolts and improves the installation quality. The automatic assembly effect is achieved through the conveying mechanism, loading mechanism and unloading mechanism, which saves time and effort and effectively ensures production efficiency.

[0059] 2. By arranging a pressure plate and a pressure block on the machine head, the front and rear covers and the casing can be pre-tightened when they are installed, and the clamping assembly facilitates the machine head to grasp and position the bolts, effectively ensuring the installation accuracy of the bolts.

[0060] 3. By setting axial compensation and radial compensation in the tightening assembly, the connection between the bolt cutter head and the bolt after contact can be ensured, the bolt cutter head can be embedded in the bolt head, and the installation of the bolt can be ensured.

[0061] 4. Through the setting of axial compensation and clutch mechanism, multiple bolts can maintain the same tightening force at best, further improving the force uniformity of the bolts.

[0062] 5. By adopting the setting of the pallet, it is convenient to control the position accuracy of the workpiece, and it is also convenient to leave space in the conveyor belt to install the jacking mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 It is a schematic diagram of the structure of the present invention;

[0064] Figure 2 It is a structural schematic diagram of the machine head of the present invention;

[0065] Figure 3 is a cross-sectional view of the handpiece of the present invention;

[0066] Figure 4 The present invention Figure 3 The enlarged view of point A in the middle;

[0067] Figure 5 It is a structural schematic diagram of the tightening assembly of the present invention;

[0068] Figure 6 The present invention Figure 5 The enlarged view of point B in the middle;

[0069] Figure 7 The present invention Figure 5 Enlarged view of point C in the middle;

[0070] Figure 8 The present invention Figure 5 The enlarged view of point D in the middle;

[0071] The markings in the figure are as follows: 1. first circulating conveyor belt; 2. second circulating conveyor belt; 3. feeding conveyor belt; 4. feeding manipulator; 5. unloading conveyor belt; 6. unloading manipulator; 7. bolt installation mechanism; 70. frame; 71. head; 710. first shell; 712. driving motor; 713. driving gear; 714. pressing plate; 715. first elastic member; 716. round hole; 717. pressing block; 718. clamping assembly; 72. cantilever; 73. tightening assembly; 730. second shell; 731. main body; 732. screwdriver head; 733. input gear; 74. axial compensation structure; 740. first column; 741. sliding chamber; 742. second column; 743. first limiting protrusion; 744. limiting groove; 745 , second elastic member; 75, radial compensation structure; 750, third column; 751, mounting hole; 752, ratchet; 753, pawl; 754, connecting cover; 76, clutch mechanism; 760, cylinder; 761, teeth; 762, input shaft; 763, sun gear; 764, planetary gear; 765, planetary disk; 766, shaft; 77, overload protection structure; 770, bracket; 7700, fixing part; 7701, adjusting part; 7702, toggle part; 7703, slide groove; 7704, third limiting protrusion; 771, second limiting protrusion; 772, third elastic member; 773, top ball; 774, metal sheet; 775, tapered hole; 8, bolt supply mechanism; 9, lifting mechanism; 10, tray; 11, conveyor belt. DETAILED DESCRIPTION

[0072] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0073] Embodiment 1:

[0074] This embodiment provides a motor automatic assembly production line, including:

[0075] The conveying mechanism comprises a first circulating conveyor belt 1 and a second circulating conveyor belt 2, and is respectively used for conveying workpieces when installing the front cover and the rear cover of the motor housing;

[0076] The feeding mechanism is located on the side of the conveying mechanism and includes a feeding conveyor belt 3 and a feeding manipulator 4, and is used for feeding the workpiece;

[0077] The unloading mechanism is located on the side of the conveying mechanism and includes an unloading conveyor belt 5 and an unloading manipulator 6, and is used for unloading work;

[0078] The bolt installation mechanism 7 comprises a frame 70, a machine head 71 and a cantilever 72 connecting the frame 70 and the machine head 71, and the frame 70 is provided with a rotating assembly for driving the cantilever 72 to rotate and a lifting assembly for lifting, and the machine head 71 is provided with a plurality of tightening assemblies 73 corresponding to the bolt installation positions on the workpiece;

[0079] A bolt supply mechanism 8 is located on the side of the bolt installation mechanism 7 and is used to supply bolts to the bolt installation mechanism 7;

[0080] A lifting mechanism 9 is installed in the conveying mechanism and is used to lift the workpiece when the bolts are installed;

[0081] Among them, the specific structures of the first circulating conveyor belt 1, the second circulating conveyor belt 2, the loading conveyor belt 3, the loading robot 4, the unloading conveyor belt 5, the unloading robot 6, the bolt supply mechanism 8 and the lifting mechanism 9 are all existing technologies. Specifically, the bolt supply mechanism 8 can adopt a vibrating loading plate, and the lifting mechanism 9 can adopt a hydraulic cylinder or a pneumatic cylinder and a top block arranged at the output end of the hydraulic cylinder or the pneumatic cylinder; the rotating component can adopt a dividing plate, and the lifting component can adopt a hydraulic cylinder or a pneumatic cylinder, which are all existing mature technologies and will not be repeated here.

[0082] The production line also includes infrared sensors and controllers for detecting the position of the workpiece, which facilitate the gripping and lifting of the work by the manipulator and the lifting mechanism 9. These are all prior arts, known to those skilled in the art, and can be configured as required, so they will not be elaborated here.

[0083] It can be seen from the present embodiment that the workpiece is lifted up by the lifting mechanism 9, and then the multiple tightening components 73 on the bolt installation mechanism 7 install and tighten the multiple bolts at the same time, which effectively improves the production efficiency, and the multiple bolts are tightened at the same time, which effectively ensures the uniformity of the force on the bolts after installation and improves the installation quality. The automatic assembly effect is achieved through the conveying mechanism, the loading mechanism and the unloading mechanism, which saves time and effort and effectively ensures the production efficiency.

[0084] Embodiment 2:

[0085] This embodiment provides a motor automatic assembly production line, which, in addition to the technical solutions of the above embodiments, also has the following technical features. The head 71 includes:

[0086] The first housing 710 is mounted on one end of the cantilever 72 away from the frame 70;

[0087] A driving assembly is installed in the first housing 710 and includes a driving motor 712 and a driving gear 713 installed at an output end of the driving motor 712;

[0088] The pressure plate 714 is installed on one side of the first housing 710 located at the tightening assembly 73, and a first elastic member 715 is arranged between the pressure plate 714 and the first housing 710, and a circular hole 716 is opened for the tightening assembly 73 to pass through;

[0089] A pressing block 717 is mounted on a side of the pressing plate 714 away from the first housing 710;

[0090] The clamping assembly 718 is mounted on one side of the pressing plate 714 located on the pressing block 717, and the output end is arranged corresponding to the circular hole 716;

[0091] The pressing block 717 and the pressing plate 714 are fixed by bolts, and the clamping assembly 718 can be a clamping cylinder. In order to improve the stability of clamping, an elastic anti-skid pad is provided at the output end of the clamping cylinder. The thickness of the pressing block 717 is greater than the thickness of the clamping cylinder and the length of the bolt, so as to avoid affecting the contact between the pressing block 717 and the front cover / rear cover. At the same time, the pressing block 717 can be of a special shape to adapt to front covers / rear covers of different shapes.

[0092] Meanwhile, the first elastic member 715 may be a spring, and a telescopic rod for connecting the pressing plate 714 and the first shell 710 is provided between the pressing plate 714 and the first shell 710 .

[0093] It can be seen from this embodiment that by setting the pressure plate 714 and the pressure block 717, the workpiece can be effectively fixed before the tightening component 73 extends out of the circular hole 716 and contacts the bolt head, thereby ensuring the installation accuracy of the bolt and the product quality. In addition, the setting of the clamping component 718 facilitates the grasping of the bolt.

[0094] Embodiment 3:

[0095] This embodiment provides a motor automatic assembly production line, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the tightening assembly 73 includes:

[0096] The second housing 730 is installed in the first housing 710;

[0097] The main body 731 is installed in the second housing 730, and one end of the main body 731 extends out of the first housing 710 toward the circular hole 716 and is installed with a screwdriver head 732, and the other end of the main body 731 extends out of the second housing 730 toward the inside of the first housing 710 and is installed with an input gear 733 meshing with the driving gear 713;

[0098] The axial compensation structure 74 is installed between the main body 731 and the screwdriver head 732 and is used to compensate for the movement of the screwdriver head 732 in the axial direction;

[0099] The radial compensation structure 75 is installed between the main body 731 and the screwdriver head 732 and is used for compensating the rotation of the screwdriver head 732 in the radial direction;

[0100] The clutch mechanism 76 is installed between the main body 731 and the input gear 733 and is used to prevent the screwdriver head 732 from being over-tightened.

[0101] It can be seen from this embodiment that by setting axial compensation and radial compensation in the tightening assembly 73, the connection between the bolt cutter head and the bolt after contact can be ensured, the bolt cutter head can be embedded in the bolt head, and the installation of the bolt can be ensured; and the setting of the axial compensation and clutch mechanism 76 enables multiple bolts to maintain the same tightening force at best, further improving the force uniformity of the bolts;

[0102] Furthermore, the input gears 733 of the plurality of tightening assemblies 73 are all meshed with the driving gear 713, which can effectively ensure the consistency of tightening the bolts.

[0103] Embodiment 4:

[0104] This embodiment provides a motor automatic assembly production line, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the axial compensation structure 74 includes:

[0105] The first column 740 is connected to one axial side of the main body 731 and has a sliding chamber 741 formed therein;

[0106] The second column 742 is axially slidably connected to one side of the first column 740, and one end thereof extends into the sliding chamber 741 for sliding connection;

[0107] The first limiting protrusion 743 is arranged on the inner wall of the sliding chamber 741 in parallel with the axial direction, and a limiting groove 744 adapted to the first limiting protrusion 743 is formed on one end surface of the second column 742 located in the sliding chamber 741;

[0108] The second elastic member 745 is sleeved on the second column 742 and is used for resetting the second column 742 after the second column 742 moves axially along the sliding chamber 741;

[0109] Among them, an integrated structure is adopted between the first limiting protrusion 743 and the first column 740, and a slider is provided at one end of the second column 742 located in the sliding chamber 741, and is bolted to the second column 742, that is, to prevent the second column 742 from separating from the first column 740, and the second elastic member 745 can be a spring.

[0110] It can be seen from this embodiment that, through the sliding connection between the first column 740 and the second column 742, and the use of a spring as an elastic member, the multiple tightening components 73 are compensated in the axial direction, so as to avoid the influence of other screwdriver heads 732 being embedded in the bolt head due to a certain screwdriver head 732 not being embedded in the bolt head, and to avoid the bolt falling off after the clamping component 718 is loosened;

[0111] Furthermore, as the installation depth of the bolt increases, the second elastic member 745 will slowly release its elastic potential energy, which can effectively ensure that the screwdriver head 732 is always embedded in the groove of the bolt head.

[0112] Embodiment 5:

[0113] This embodiment provides a motor automatic assembly production line, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the radial compensation structure 75 includes:

[0114] The third column 750 is mounted on an end of the second column 742 away from the first column 740 , and an end away from the main body 731 is provided with a mounting hole 751 for mounting a screwdriver head 732 ;

[0115] A ratchet 752 connected to an end of the second column 742 away from the first column 740;

[0116] A ratchet pawl 753 is mounted on the third column 750 and is disposed corresponding to the ratchet wheel 752;

[0117] The connecting cover 754 is sleeved on the second column 742 and fixed to one end of the third column 750 and rotatably connected to the second column 742;

[0118] The ratchet 752 and the second column 742 may be of an integrated structure, and the connecting cover 754 may extend toward one side of the first column 740 to form an edge for embedding the second elastic member 745 , and a torsion spring may be disposed in the ratchet 753 .

[0119] It can be seen from the present embodiment that the second column 742 and the third column 750 are connected by using the ratchet 752 and the pawl 753, that is, when a certain screwdriver head 732 is not aligned with the groove of the bolt head, when the first housing 710 is pressed down, the screwdriver head 732 can autonomously rotate in the radial direction in the opposite direction of tightening. Since the groove of the bolt head is usually provided with an arc or chamfer, the screwdriver head 732 can slide into the groove of the bolt head after autonomous rotation, so that when there is a deviation between the screwdriver head 732 and the bolt head, the screwdriver head 732 performs radial compensation, so that the screwdriver head 732 rotates and is embedded in the groove of the bolt head.

[0120] Of course, when there is a large deviation between the screwdriver head 732 and the bolt head or the screwdriver head 732 fails to fit into the groove of the bolt head, the screwdriver head 732 can be pushed into the groove of the bolt head by the elastic potential energy of the second elastic member 745 when the screwdriver head 732 rotates, and then the clutch mechanism 76 is used to continue tightening after the remaining bolts reach the tightening force until the tightening force is reached;

[0121] Therefore, the clamping assembly 718 can be controlled to loosen the bolt after the screwdriver head 732 drives the bolt to rotate, and the stability of the bolt can be ensured. Therefore, there will be wear on the elastic anti-slip pad at the output end of the clamping assembly 718. Therefore, in actual use, the elastic anti-slip pad needs to be replaced after a period of use. Of course, the time required for the screwdriver head 732 that is not embedded in the groove of the bolt head to rotate and embed into the groove of the bolt head is very short, so the wear on the elastic anti-slip pad is usually small.

[0122] Embodiment 6:

[0123] This embodiment provides a motor automatic assembly production line, which, in addition to the technical solutions of the above embodiments, also has the following technical features. The clutch mechanism 76 includes:

[0124] The cylinder 760 is installed on the side of the main body 731 away from the screwdriver head 732 and has a plurality of teeth 761 on the inner wall;

[0125] An input shaft 762, one end of which is connected to the input gear 733 and the other end of which is provided with a sun gear 763;

[0126] A plurality of planetary gears 764 are arranged at equal intervals around the circumference of the sun gear 763 and mesh with both the sun gear 763 and the teeth 761;

[0127] A planetary disc 765, bearings are connected to the inner wall of the cylinder 760, and a plurality of shafts 766 for mounting the planetary gears 764 are provided;

[0128] The overload protection structure 77 is sleeved on the main body 731 and is used to prevent the rotation of the cylinder 760;

[0129] The main body 731 is connected to the planetary disk 765 and rotates synchronously with the planetary disk 765;

[0130] At the same time, the teeth 761 and the cylinder 760 may be formed into an integrated structure.

[0131] It can be seen from the present embodiment that by using the planetary gear 764 group in the clutch mechanism 76, when a certain bolt reaches the pre-tightening force, it is equivalent to that the main body 731 is stuck, thereby limiting the rotation of the planetary plate 765 and the orbital revolution of the planetary gear 764, thereby preventing the input from not stopping and causing the bolt to be over-tightened. Moreover, after the bolt reaches the pre-tightening force, the ratio of the orbital revolution of the planetary gear 764 to the rotation of the planetary gear 764 is reduced, and the driving force for driving the cylinder 760 to rotate is increased, eliminating the obstruction of the overload protection structure 77, prompting the cylinder 760 to rotate, reducing the force applied to the main body 731 and the screwdriver head 732, and effectively ensuring that the bolt is prevented from being over-tightened.

[0132] Moreover, after some bolts have reached the pre-tightening force, the input is not stopped and the remaining bolts can continue to be tightened, effectively ensuring that all bolts reach the same pre-tightening force and ensuring that the bolts are evenly stressed.

[0133] Embodiment 7:

[0134] This embodiment provides a motor automatic assembly production line, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the overload protection structure 77 includes:

[0135] A bracket 770 is sleeved on the main body 731;

[0136] A second limiting protrusion 771 is provided at one end of the cylinder 760;

[0137] The third elastic member 772 is mounted on the bracket 770 and has a top bead 773 at one end thereof abutting against the cylinder 760 and the other end abutting against the bracket 770;

[0138] The top bead 773 hinders the rotation of the cylinder 760 by abutting against the second limiting protrusion 771;

[0139] Meanwhile, the second limiting protrusion 771 and the cylinder 760 can be bonded and connected, and the third elastic member 772 can be a spring.

[0140] It can be seen from the present embodiment that the rotation of the cylinder 760 is limited by limiting the second limiting protrusion 771 with a push column, and when the force driving the cylinder 760 to rotate is sufficient to compress the third elastic member 772 and cause the second limiting protrusion 771 to push open the top bead 773, the cylinder 760 can rotate, thereby avoiding the input end from being stuck due to the sticking of the main body 731 and the screwdriver head 732, and effectively relieving the force on the input end.

[0141] Embodiment 8:

[0142] This embodiment provides a motor automatic assembly production line, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and the overload protection structure 77 also includes:

[0143] The metal sheet 774 is sleeved on the main body 731 and is provided with a tapered hole 775 adapted to the top bead 773, and the second limiting protrusion 771 is made of non-conductive material;

[0144] A power supply and a current sensor are also provided, and the power supply, the current sensor, the metal sheet 774 and the top bead 773 are connected in series in a closed loop circuit;

[0145] Meanwhile, the specific structures of the power supply and the current sensor are both existing mature technologies. Specifically, they can be electrically connected using wires, which will not be elaborated here.

[0146] It can be seen from the present embodiment that, by providing the metal sheet 774 and making the second limiting protrusion 771 of a non-conductive material, when the current sensor can detect the current in the closed-loop circuit, it is a normal tightening process. When the second limiting protrusion 771 pushes the top bead 773 away, the metal sheet 774 is caused to separate from the top bead 773, thereby causing the closed-loop circuit to be broken, so that the current sensor cannot detect the current. Therefore, at this time, feedback can be performed, indicating that the bolt has completed the predetermined pre-tightening force. After all the current sensors on the tightening components 73 have fed back that the bolts have completed the predetermined pre-tightening force, the input stops, that is, the drive motor 712 stops, so as to facilitate detection and ensure that all bolts have reached the pre-tightening force, ensure the uniformity of the force on the bolts, and improve the installation quality of the bolts.

[0147] Embodiment 9:

[0148] This embodiment provides a motor automatic assembly production line, which, in addition to the technical solutions of the above embodiments, also has the following technical features. The bracket 770 includes:

[0149] The fixing part 7700 has two ends connected to the first shell 710 and the metal sheet 774 respectively;

[0150] The adjusting portion 7701 is sleeved on the fixing portion 7700 and is threadedly connected to the fixing portion 7700 and is used to adjust the deformation of the third elastic member 772;

[0151] The toggle portion 7702 is sleeved on the adjustment portion 7701 and is rotatably connected to the second housing 730, and a slide groove 7703 is axially provided on the inner wall thereof;

[0152] The third limiting protrusion 7704 is provided on the surface of the adjusting portion 7701 and is slidably connected to the sliding groove 7703;

[0153] The fixing portion 7700 may be made of non-conductive material, such as plastic, and the other metal sheets 774 may be bonded together, while the third limiting protrusion 7704 and the adjusting portion 7701 may be an integrated structure.

[0154] It can be seen from the present embodiment that the stability of the metal sheet 774 is improved by the fixing portion 7700, and the separation of the metal sheet 774 and the top bead 773 is ensured, and the threaded connection of the adjusting portion 7701 on the fixing portion 7700 is adjusted by the toggle portion 7702, so that the adjusting portion 7701 is lifted and lowered along the fixing portion 7700, thereby changing the deformation of the third elastic member 772, and the provision of the third limiting protrusion 7704 and the slide groove 7703 facilitates the connection between the toggle portion 7702 and the adjusting portion 7701, thereby improving the convenience of adjustment.

[0155] Embodiment 10:

[0156] This embodiment provides a motor automatic assembly production line, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including:

[0157] The tray 10 is located on the first circulating conveyor belt 1 and the second circulating conveyor belt 2 and is used for placing workpieces;

[0158] The first circulating conveyor belt 1 and the second circulating conveyor belt 2 each include two parallel conveyor belts 11, and both ends of the pallet 10 are placed on the conveyor belts 11, and the lifting mechanism 9 is located between the two parallel conveyor belts 11 and is used to lift the pallet 10;

[0159] At the same time, the two parallel conveyor belts 11 used by the first circulating conveyor belt 1 and the second circulating conveyor belt 2 can adopt gear transmission belts, and the first circulating conveyor belt 1 and the second circulating conveyor belt 2 are also provided with other auxiliary devices for stable and precise movement of the pallet 10, such as infrared sensors, shock absorbers and transmission rollers, etc., and a rotating mechanism is provided at the corner to realize the change of the conveying direction of the pallet 10. These are all prior arts and can be arranged by technicians in this field to realize stable and precise movement of the pallet 10, and this application will not repeat them.

[0160] It can be seen from the present embodiment that by adopting the setting of the pallet 10, it is convenient to control the position accuracy of the workpiece, and at the same time it is convenient to leave space in the conveyor belt 11 to install the lifting mechanism 9, so that after the pallet 10 reaches the predetermined position, it can be lifted by the lifting mechanism 9, and then the bolts can be installed. In order to ensure that after the pallet 10 reaches the predetermined position, it can stay for a short time to facilitate the lifting of the lifting mechanism 9, the conveyor belt 11 should also be provided with a lifting baffle driven by a cylinder or hydraulic pressure, or other means such as stopping the first circulating conveyor belt 1 / the second circulating conveyor belt 2 to prompt the pallet 10 to reach the predetermined position for a short stay. These are all set up for the actual needs of technical personnel in this field, and this application will not repeat them.

[0161] The present invention also provides an assembly process for an automatic motor assembly production line, comprising the following steps:

[0162] S1: The loading robot 4 loads the casing and the front cover in sequence;

[0163] S2: The bolt installation mechanism 7 grabs the bolts from the bolt supply mechanism 8;

[0164] S3: The first circulating conveyor belt 1 conveys the pallet 10 and the workpiece to a predetermined position, and the lifting mechanism 9 pushes the pallet 10 to lift up;

[0165] S4: The bolt installation mechanism 7 installs the bolts to achieve the connection and fixation between the front cover and the housing;

[0166] S5: The loading robot 4 turns over the workpiece in S4 and loads it to the pallet 10 on the second conveyor belt 11;

[0167] S6: The loading robot 4 loads the rotor and the rear cover in sequence;

[0168] S7: The bolt installation mechanism 7 grabs the bolts from the bolt supply mechanism 8;

[0169] S8: The second circulating conveyor belt 2 conveys the pallet 10 and the workpiece to a predetermined position, and the lifting mechanism 9 pushes the pallet 10 to lift up;

[0170] S9: The bolt installation mechanism 7 installs the bolts to achieve the connection and fixation between the rear cover and the housing;

[0171] S10: The unloading robot 6 grabs the workpiece in S9 and places it on the unloading conveyor belt 5;

[0172] Among them, the front cover, rear cover, rotor, casing and stator in the casing are all pre-installed and manufactured separately, such as the bearings in the front cover / rear cover, the copper wire on the rotor, etc.

[0173] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A motor automatic assembly production line, characterized in that: include: The conveying mechanism comprises a first circulating conveying belt (1) and a second circulating conveying belt (2), and is respectively used for conveying workpieces when installing the front cover and the rear cover of the motor housing; A loading mechanism is located on the side of the conveying mechanism and comprises a loading conveyor belt (3) and a loading robot (4), and is used for loading workpieces; The unloading mechanism is located on the side of the conveying mechanism and comprises an unloading conveying belt (5) and an unloading manipulator (6), and is used for unloading work; The bolt installation mechanism (7) comprises a frame (70), a machine head (71) and a cantilever (72) connecting the frame (70) and the machine head (71), wherein the frame (70) is provided with a rotating assembly for driving the cantilever (72) to rotate and a lifting assembly for lifting, and the machine head (71) is provided with a plurality of tightening assemblies (73) corresponding to bolt installation positions on a workpiece; A bolt supply mechanism (8), located on a side of the bolt installation mechanism (7) and used to supply bolts to the bolt installation mechanism (7); The lifting mechanism (9) is installed in the conveying mechanism and is used to lift the workpiece when the bolts are installed.

2. The motor automatic assembly production line according to claim 1, characterized in that: The head (71) comprises: A first housing (710) is mounted on an end of the cantilever (72) away from the frame (70); A driving assembly is installed in the first housing (710) and comprises a driving motor (712) and a driving gear (713) installed at the output end of the driving motor (712); A pressure plate (714) is installed on one side of the first housing (710) and located at the tightening assembly (73), and a first elastic member (715) is arranged between the pressure plate and the first housing (710), and a circular hole (716) is provided for the tightening assembly (73) to pass through. A pressing block (717) is mounted on a side of the pressing plate (714) away from the first housing (710); The clamping assembly (718) is installed on the pressing plate (714) and is located on one side of the pressing block (717), and the output end is arranged corresponding to the circular hole (716).

3. The motor automatic assembly production line according to claim 2, characterized in that: The tightening assembly (73) comprises: A second housing (730) is installed in the first housing (710); The main body (731) is installed in the second housing (730), and one end of the main body (731) extends out of the first housing (710) toward the circular hole (716) and is installed with a screwdriver head (732), and the other end of the main body (731) extends out of the second housing (730) toward the inside of the first housing (710) and is installed with an input gear (733) meshing with the driving gear (713); An axial compensation structure (74) is installed between the main body (731) and the screwdriver head (732) and is used to compensate for the movement of the screwdriver head (732) in the axial direction; A radial compensation structure (75) is installed between the main body (731) and the screwdriver head (732) and is used to compensate for the rotation of the screwdriver head (732) in the radial direction; The clutch mechanism (76) is installed between the main body (731) and the input gear (733) and is used to prevent the screwdriver head (732) from being over-tightened.

4. The motor automatic assembly production line according to claim 3, characterized in that: The axial compensation structure (74) comprises: A first column (740) is connected to one axial side of the main body (731) and has a sliding chamber (741) formed therein; The second column (742) is axially slidably connected to one side of the first column (740), and one end thereof extends into the sliding chamber (741) for sliding connection; A first limiting protrusion (743) is arranged on the inner wall of the sliding chamber (741) in parallel with the axial direction, and a limiting groove (744) adapted to the first limiting protrusion (743) is provided on one end surface of the second column (742) located in the sliding chamber (741); The second elastic member (745) is sleeved on the second column (742) and is used for resetting the second column (742) after the second column (742) moves axially along the sliding chamber (741).

5. The motor automatic assembly production line according to claim 4, characterized in that: The radial compensation structure (75) comprises: The third column (750) is mounted on an end of the second column (742) away from the first column (740), and an end away from the main body (731) is provided with a mounting hole (751) for mounting a screwdriver head (732); A ratchet (752) connected to an end of the second column (742) away from the first column (740); A ratchet pawl (753) is mounted on the third column (750) and is arranged corresponding to the ratchet wheel (752); The connecting cover (754) is sleeved on the second column (742), fixed to one end of the third column (750), and rotatably connected to the second column (742).

6. The motor automatic assembly production line according to claim 4, characterized in that: The clutch mechanism (76) comprises: The cylinder (760) is installed on a side of the main body (731) away from the screwdriver head (732) and has a plurality of teeth (761) on its inner wall; An input shaft (762) having one end connected to the input gear (733) and the other end provided with a sun gear (763); A plurality of planetary gears (764) are arranged at equal intervals around the circumference of the sun gear (763) and mesh with the sun gear (763) and the teeth (761); A planetary disc (765) is bearing-connected to the inner wall of the cylinder (760) and is provided with a plurality of shafts (766) for mounting planetary gears (764); An overload protection structure (77) is sleeved on the main body (731) and is used to prevent the cylinder (760) from rotating; The main body (731) is connected to the planetary disk (765) and rotates synchronously with the planetary disk (765).

7. The motor automatic assembly production line according to claim 6, characterized in that: The overload protection structure (77) comprises: A bracket (770) is sleeved on the main body (731); A second limiting protrusion (771) is provided at one end of the cylinder (760); A third elastic member (772) is mounted on the bracket (770), and one end of the third elastic member is provided with a top bead (773) for abutting against the cylinder (760), and the other end of the third elastic member is abutted against the bracket (770); The top bead (773) hinders the rotation of the cylinder (760) by abutting against the second limiting protrusion (771).

8. The motor automatic assembly production line according to claim 7, characterized in that: The overload protection structure (77) further comprises: The metal sheet (774) is sleeved on the main body (731) and is provided with a conical hole (775) adapted to the top bead (773), and the second limiting protrusion (771) is made of a non-conductive material; A power supply and a current sensor are also provided, and the power supply, the current sensor, the metal sheet (774) and the top bead (773) are connected in series in a closed loop circuit.

9. The motor automatic assembly production line according to claim 7, characterized in that: The support (770) comprises: The fixing part (7700) has two ends respectively connected to the first shell (710) and the metal sheet (774); The adjusting portion (7701) is sleeved on the fixing portion (7700) and is threadedly connected to the fixing portion (7700) and is used to adjust the deformation of the third elastic member (772); The toggle portion (7702) is sleeved on the adjustment portion (7701) and is rotationally connected to the second housing (730), and a slide groove (7703) is provided on the inner wall along the axial direction; The third limiting protrusion (7704) is arranged on the surface of the adjusting portion (7701) and is slidably connected to the sliding groove (7703).

10. The motor automatic assembly production line according to claim 1, characterized in that: Also includes: A tray (10) is located on the first circulating conveyor belt (1) and the second circulating conveyor belt (2) and is used for placing workpieces; The first circulating conveyor belt (1) and the second circulating conveyor belt (2) both include two conveyor belts (11) arranged in parallel, and both ends of the pallet (10) are placed on the conveyor belts (11), and the lifting mechanism (9) is located between the two conveyor belts (11) arranged in parallel and is used to lift the pallet (10).

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