Automated assembly production line for electric motor

Abstract

The present invention relates to the technical field of electric motor assembly, and specifically to an automated assembly production line for an electric motor. The automated assembly production line comprises a conveying mechanism, a loading mechanism, an unloading mechanism, a bolt mounting mechanism, a bolt supply mechanism and a jacking mechanism, wherein the conveying mechanism is configured to convey a workpiece; the loading mechanism is configured to load the workpiece; the unloading mechanism is configured to unload the workpiece; the bolt mounting mechanism comprises a frame, a head, and a cantilever for connecting the frame to the head, the frame being provided with a rotating assembly for driving the cantilever to rotate and a lifting assembly for lifting same, and the head being provided with a plurality of screwing assemblies corresponding to bolt mounting positions on the workpiece; the bolt supply mechanism is configured to supply bolts; and the jacking mechanism is configured to jack up the workpiece during mounting of the bolts. The workpiece is jacked up by means of the jacking mechanism, and then a plurality of bolts are simultaneously mounted and tightened by means of the plurality of screwing assemblies on the bolt mounting mechanism, thereby effectively improving the production efficiency, ensuring the stress uniformity of the mounted bolts, and improving the mounting quality. Moreover, the automated assembly is time-saving and labor-saving.

Description

An automated motor assembly production line Technical Field

[0001] This invention belongs to the field of motor assembly technology, and in particular relates to an automated motor assembly production line. Background Technology

[0002] An electric motor is a device that converts electrical energy into mechanical energy. It mainly consists of a housing, a stator and a rotor installed inside the housing, as well as a front cover and a rear cover. During the installation of the front cover and the rear cover, bolt connection is one of the most common connection methods in assembly.

[0003] In traditional motor assembly lines, the installation of the front and rear covers is mostly done manually by bolting, which is time-consuming and labor-intensive. Some lines use robotic arms with electric screwdrivers, but these can only tighten one bolt at a time, which can easily lead to uneven stress on multiple bolts after tightening. Although this can be mitigated by tightening diagonally, each bolt is usually tightened directly in one go, which still affects the uniformity of bolt stress and installation quality. Furthermore, the efficiency of tightening a single bolt at a time needs to be improved. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned technical problems by providing an automated motor assembly production line that simultaneously tightens multiple bolts, thereby improving installation quality and production efficiency.

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

[0006] The conveying mechanism includes a first circulating conveyor belt and a second circulating conveyor belt, which are used for conveying workpieces during the installation of the front cover and rear cover of the motor housing, respectively.

[0007] The loading mechanism is located on the side of the conveying mechanism and includes a loading conveyor belt and a loading robot, and is used for loading workpieces;

[0008] The unloading mechanism is located on the side of the conveying mechanism and includes an unloading conveyor belt and an unloading robot, and is used for unloading materials during operation;

[0009] The bolt installation mechanism includes a frame, a head and a cantilever connecting the frame and the head. The frame is equipped with a rotating component for driving the cantilever to rotate and a lifting component for lifting. The head is equipped with multiple tightening components corresponding to the bolt installation positions on the workpiece.

[0010] A bolt supply mechanism, located on the side of the bolt mounting mechanism, is used to supply bolts to the bolt mounting mechanism;

[0011] The lifting mechanism is installed inside the conveying mechanism and is used to lift the workpiece during bolt installation.

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

[0013] The first housing is installed at the end of the cantilever away from the frame;

[0014] The drive assembly is installed inside the first housing and includes a drive motor and a drive gear installed at the output end of the drive motor.

[0015] A pressure plate is installed on one side of the first housing located on the tightening assembly, and a first elastic element is provided between the pressure plate and the first housing, and a round hole is provided for the tightening assembly to pass through.

[0016] The pressure block is installed on the side of the pressure plate away from the first housing;

[0017] The clamping assembly is installed on the side of the pressure plate located on the pressure block, and the output end is set to correspond to the circular hole.

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

[0019] The second housing is installed inside the first housing;

[0020] The main body is installed inside the second housing, with one end extending out of the first housing into the round hole and equipped with a screwdriver head, and the other end extending into the second housing into the first housing and equipped with an input gear that meshes with the drive gear.

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

[0022] A radial compensation structure is installed between the 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 over-tightening of the screwdriver bit.

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

[0025] The first column is connected to one side of the main body along the axis and has a sliding chamber inside;

[0026] The second column is axially slidably connected to one side of the first column, and one end extends into the sliding cavity for slidable connection.

[0027] The first limiting protrusion is arranged parallel to the axial direction on the inner wall of the sliding chamber, and the second column has a limiting groove adapted to the first limiting protrusion on one end surface inside the sliding chamber.

[0028] The second elastic element is sleeved on the second column and is used to reset the second column after it moves axially along the sliding chamber.

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

[0030] The third column is installed at the end of the second column away from the first column, and the end away from the main body has a mounting hole for installing a screwdriver bit;

[0031] A ratchet is connected to the end of the second post that is furthest from the first post;

[0032] The pawl is mounted on the third column and is positioned opposite to the ratchet.

[0033] The connecting cover is fitted onto the second column and fixed to one end of the third column, and is rotatably connected to the second column.

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

[0035] The cylinder is installed on the side of the main body away from the screwdriver head, and has multiple teeth on its inner wall;

[0036] The input shaft is connected to the input gear at one end and has a sun gear at the other end.

[0037] The planetary gears are arranged at equal intervals around the circumference of the sun gear and mesh with the sun gear and its teeth.

[0038] The planetary disk is connected to the inner wall of the cylinder by bearings and has multiple shafts for mounting planetary gears.

[0039] An overload protection structure is fitted onto the main body and is used to prevent the cylinder from rotating.

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

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

[0042] The support frame is fitted onto the main body;

[0043] The second limiting protrusion is located at one end of the cylinder;

[0044] The third elastic element is installed on the bracket, with a top ball at one end that abuts against the cylinder and the other end that abuts against the bracket.

[0045] The top bead prevents the cylinder from rotating by abutting against the second limiting protrusion.

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

[0047] A metal sheet is fitted onto the main body and has a conical hole that matches the top bead. The second limiting protrusion is made of a non-conductive material.

[0048] It also includes a power supply and a current sensor, and the power supply, current sensor, metal plate and top bead are connected in series in the closed loop circuit.

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

[0050] The fixing part is connected to the first housing and the metal plate at both ends, respectively.

[0051] An adjusting part is fitted onto a fixed part and threadedly connected to the fixed part, and is used to adjust the deformation of the third elastic element;

[0052] The actuating part is sleeved on the adjusting part and rotatably connected to the second housing, and a sliding groove is provided on the inner wall along the axial direction;

[0053] The third limiting protrusion is set on the surface of the adjustment part and is slidably connected to the slide groove.

[0054] Furthermore, the above technical solution also includes:

[0055] A pallet, located on the first and second circulating conveyor belts, is used for placing workpieces;

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

[0057] The beneficial effects of this invention are as follows:

[0058] 1. The workpiece is lifted by the lifting mechanism, and then multiple tightening components on the bolt installation mechanism simultaneously install and tighten multiple bolts, which effectively improves production efficiency. The simultaneous tightening of multiple bolts also ensures the uniformity of force on the bolts after installation, improving installation quality. Furthermore, the automatic assembly effect is achieved through the conveying mechanism, feeding mechanism, and unloading mechanism, saving time and effort and effectively ensuring production efficiency.

[0059] 2. By setting pressure plates and pressure blocks on the machine head, pre-tightening can be performed when installing the front and rear covers and the machine housing. Furthermore, the clamping components facilitate the machine head's gripping and positioning of bolts, effectively ensuring the installation accuracy of the bolts.

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

[0061] 4. By using axial compensation and a clutch mechanism, multiple bolts can maintain the same tightening force to the best extent, further improving the uniformity of bolt stress.

[0062] 5. By using a pallet, it is easy to control the positional accuracy of the workpiece, and it is also easy to leave space in the conveyor belt to install the lifting mechanism. Attached Figure Description

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

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

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

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

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

[0068] Figure 6 is an enlarged view of point B in Figure 5 of this invention;

[0069] Figure 7 is an enlarged view of point C in Figure 5 of this invention;

[0070] Figure 8 is an enlarged view of point D in Figure 5 of this invention;

[0071] The markings in the diagram represent: 1. First circulating conveyor belt; 2. Second circulating conveyor belt; 3. Feeding conveyor belt; 4. Feeding robot; 5. Discharging conveyor belt; 6. Discharging robot; 7. Bolt installation mechanism; 70. Frame; 71. Machine head; 710. First housing; 712. Drive motor; 713. Drive gear; 714. Pressure plate; 715. First elastic element; 716. Circular hole; 717. Pressure block; 718. Clamping assembly; 72. Cantilever; 73. Tightening assembly; 730. Second housing; 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. 75. Second elastic element; 76. Radial compensation structure; 770. Third column; 751. Mounting hole; 752. Ratchet; 753. Pad; 754. Connecting cover; 76. Clutch mechanism; 760. Cylinder; 761. Tooth; 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. Actuating part; 7703. Slide groove; 7704. Third limiting protrusion; 771. Second limiting protrusion; 772. Third elastic element; 773. Top ball; 774. Metal sheet; 775. Tapered hole; 8. Bolt supply mechanism; 9. Lifting mechanism; 10. Pallet; 11. Conveyor belt. Detailed Implementation

[0072] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application. Example

[0073] This embodiment provides an automated motor assembly production line, including:

[0074] The conveying mechanism includes a first circulating conveyor belt 1 and a second circulating conveyor belt 2, which are used for conveying workpieces during the installation of the front cover and rear cover of the motor housing, respectively.

[0075] The feeding mechanism is located on the side of the conveying mechanism and includes a feeding conveyor belt 3 and a feeding robot 4, and is used for feeding workpieces;

[0076] The unloading mechanism is located on the side of the conveying mechanism and includes an unloading conveyor belt 5 and an unloading robot 6, and is used for unloading materials during operation;

[0077] The bolt installation mechanism 7 includes a frame 70, a head 71, and a cantilever 72 connecting the frame 70 and the head 71. The frame 70 is provided with a rotating assembly for driving the cantilever 72 to rotate and a lifting assembly for lifting. The head 71 is provided with multiple tightening assemblies 73 corresponding to the bolt installation positions on the workpiece.

[0078] Bolt supply mechanism 8 is located on the side of bolt mounting mechanism 7 and is used to supply bolts to bolt mounting mechanism 7;

[0079] Lifting mechanism 9 is installed inside the conveying mechanism and is used to lift the workpiece during bolt installation;

[0080] The specific structures of the first circulating conveyor belt 1, the second circulating conveyor belt 2, the feeding conveyor belt 3, the feeding 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 be a vibrating feeding plate, and the lifting mechanism 9 can be a hydraulic cylinder or a pneumatic cylinder with a top block set at the output end of the hydraulic cylinder or pneumatic cylinder; the rotating component can be an indexing plate, and the lifting component can be a hydraulic cylinder or a pneumatic cylinder, all of which are existing mature technologies and will not be described in detail here.

[0081] Furthermore, the production line also includes infrared sensors and controllers for detecting the position of workpieces, facilitating the gripping and lifting of the robotic arm and lifting mechanism, etc. These are all existing technologies, mastered by those skilled in the art, and can be set up as needed, so they will not be described in detail here.

[0082] As can be seen from this embodiment, the lifting mechanism 9 lifts the workpiece, and then multiple tightening components 73 on the bolt installation mechanism 7 simultaneously install and tighten multiple bolts, which effectively improves production efficiency. Furthermore, the simultaneous tightening of multiple bolts effectively ensures the uniformity of force on the bolts after installation, improving installation quality. Moreover, the automatic assembly effect is achieved through the conveying mechanism, the feeding mechanism, and the unloading mechanism, saving time and effort and effectively ensuring production efficiency. Example

[0083] This embodiment provides an automated motor assembly production line, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the machine head 71 includes:

[0084] The first housing 710 is installed at the end of the cantilever 72 away from the frame 70;

[0085] The drive assembly is installed inside the first housing 710 and includes a drive motor 712 and a drive gear 713 installed at the output end of the drive motor 712.

[0086] A pressure plate 714 is installed on one side of the first housing 710 located on the tightening assembly 73, and a first elastic member 715 is provided between the pressure plate 714 and the first housing 710, and a round hole 716 is provided for the tightening assembly 73 to pass through.

[0087] The pressure block 717 is installed on the side of the pressure plate 714 away from the first housing 710;

[0088] The clamping assembly 718 is installed on the side of the pressure plate 714 located on the pressure block 717, and its output end is set corresponding to the circular hole 716;

[0089] The pressure block 717 and the pressure plate 714 are fixed together by bolts, and the clamping assembly 718 can be a clamping cylinder. In order to improve the stability of clamping, the output end of the clamping cylinder is provided with an elastic anti-slip pad. The thickness of the pressure 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 pressure block 717 and the front cover / rear cover. At the same time, the pressure block 717 can be irregularly shaped to adapt to different shapes of front covers / rear covers.

[0090] Meanwhile, the first elastic element 715 can be a spring, and a telescopic rod for connecting the pressure plate 714 and the first housing 710 is provided.

[0091] As can be seen from this embodiment, by setting up the pressure plate 714 and the pressure block 717, the workpiece can be effectively fixed before the tightening component 73 extends out of the round hole 716 and contacts the bolt head, ensuring the installation accuracy of the bolt and ensuring product quality. Furthermore, the setting up of the clamping component 718 facilitates the gripping of the bolt. Example

[0092] This embodiment provides an automated motor 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:

[0093] The second housing 730 is installed inside the first housing 710;

[0094] The main body 731 is installed inside the second housing 730, with one end extending out of the first housing 710 into the round hole 716 and a screwdriver head 732 installed thereon, and the other end extending into the second housing 730 into the first housing 710 and an input gear 733 that meshes with the drive gear 713 installed thereon.

[0095] An axial compensation structure 74 is installed between the main body 731 and the screwdriver head 732, and is used for axial movement compensation of the screwdriver head 732.

[0096] A radial compensation structure 75 is installed between the main body 731 and the screwdriver head 732, and is used for radial rotation compensation of the screwdriver head 732.

[0097] The clutch mechanism 76 is installed between the main body 731 and the input gear 733, and is used to prevent over-tightening of the screwdriver head 732.

[0098] As can be seen from this embodiment, 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 guaranteed, the bolt cutter head can be embedded in the bolt head, and the installation of the bolt can be guaranteed; and the setting of axial compensation and clutch mechanism 76 can enable multiple bolts to maintain the same tightening force, further improving the uniformity of bolt force.

[0099] Furthermore, the input gears 733 of multiple tightening components 73 are all meshed with the drive gear 713, which can effectively ensure the consistency of bolt tightening. Example

[0100] This embodiment provides an automated motor 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:

[0101] The first column 740 is connected to one axial side of the main body 731 and has a sliding chamber 741 inside.

[0102] The second column 742 is axially slidably connected to one side of the first column 740, and one end extends into the sliding chamber 741 for slidable connection.

[0103] The first limiting protrusion 743 is arranged parallel to the axial direction on the inner wall of the sliding chamber 741, and the second column 742 is provided with a limiting groove 744 adapted to the first limiting protrusion 743 on one end surface inside the sliding chamber 741.

[0104] The second elastic element 745 is sleeved on the second column 742 and is used to reset the second column 742 after it moves axially along the sliding chamber 741.

[0105] The first limiting protrusion 743 and the first column 740 are integrated into one piece, and the second column 742 is provided with a slider at one end in the sliding chamber 741 and is bolted to the second column 742, so as to prevent the second column 742 from separating from the first column 740. The second elastic element 745 can be a spring.

[0106] As can be seen from this embodiment, the sliding connection between the first column 740 and the second column 742, and the use of a spring as an elastic element, allows multiple tightening components 73 to compensate in the axial direction, preventing the failure of one screwdriver bit 732 to embed into the bolt head from affecting the embedding of other screwdriver bits 732 into the bolt head, and preventing the bolt from falling off after the clamping component 718 is released.

[0107] Furthermore, the second elastic element 745 will gradually release elastic potential energy as the installation depth of the bolt increases, which can effectively ensure that the screwdriver tip 732 is always embedded in the groove of the bolt head. Example

[0108] This embodiment provides an automated motor 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:

[0109] The third column 750 is installed at the end of the second column 742 away from the first column 740, and the end away from the main body 731 has a mounting hole 751 for installing the screwdriver head 732.

[0110] Ratchet 752 is connected to the end of the second post 742 that is away from the first post 740;

[0111] Pawl 753 is mounted on the third column 750 and is configured to correspond to ratchet 752;

[0112] The connecting cover 754 is sleeved on the second column 742 and fixed to one end of the third column 750, and is rotatably connected to the second column 742.

[0113] The ratchet 752 and the second column 742 can be integrated into one piece, and the connecting cover 754 extends to the side of the first column 740 to form an edge for housing the second elastic element 745. Meanwhile, a torsion spring is provided inside the pawl 753.

[0114] As can be seen from this embodiment, by using ratchet 752 and pawl 753 to connect the second column 742 and the third column 750, when a 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 rotate autonomously in the reverse direction of tightening in the radial direction. Since the groove of the bolt head is usually provided with an arc or chamfer, it can cause the screwdriver head 732 to slide into the groove of the bolt head after autonomous rotation, ensuring 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.

[0115] Of course, when there is a large deviation between the screwdriver tip 732 and the bolt head, or when the screwdriver tip 732 fails to be inserted into the groove of the bolt head, the screwdriver tip 732 can be pushed into the groove of the bolt head by the elastic potential energy of the second elastic element 745 when it rotates. Then, through the clutch mechanism 76, after the other bolts have reached the tightening force, the screwdriver tip 732 can continue to be tightened until the tightening force is reached.

[0116] 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 is ensured. As a result, the elastic anti-slip pad at the output end of the clamping assembly 718 will wear. 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, which is not embedded in the groove of the bolt head, to rotate and embed in the groove of the bolt head is very short, so the wear on the elastic anti-slip pad is usually small. Example

[0117] This embodiment provides an automated motor 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:

[0118] The cylinder 760 is installed on the side of the main body 731 away from the screwdriver head 732, and has multiple teeth 761 on its inner wall;

[0119] The input shaft 762 is connected to the input gear 733 at one end and has a sun gear 763 at the other end;

[0120] Planetary gears 764 are arranged at equal intervals around the circumference of sun gear 763 and mesh with both sun gear 763 and teeth 761.

[0121] The planetary disk 765 is connected to the inner wall of the cylinder 760 by bearings and is provided with multiple shafts 766 for mounting the planetary gears 764.

[0122] The overload protection structure 77 is sleeved on the main body 731 and is used to prevent the rotation of the cylinder 760.

[0123] The main body 731 is connected to the planetary disk 765 and rotates synchronously with the planetary disk 765;

[0124] Meanwhile, the tooth 761 and the cylinder 760 can be integrated into one piece.

[0125] As can be seen from this embodiment, by using a planetary gear 764 set for the clutch mechanism 76, when a bolt reaches the preload, it is equivalent to the main body 731 being jammed, thereby restricting the rotation of the planetary disk 765 and the revolution of the planetary gear 764, avoiding the situation where the bolt is over-tightened due to the input not stopping. Furthermore, after the bolt reaches the preload, the ratio of the revolution of the planetary gear 764 to the rotation of the planetary gear 764 decreases, the driving force for the rotation of the cylinder 760 increases, the obstruction of the overload protection structure 77 is eliminated, and the cylinder 760 is made to rotate, reducing the force applied to the main body 731 and the screwdriver head 732, effectively ensuring the bolt is not over-tightened.

[0126] Furthermore, even after some bolts have reached their preload, the input does not stop, allowing the remaining bolts to continue tightening, effectively ensuring that all bolts reach the same preload and guaranteeing uniform stress distribution. Example

[0127] This embodiment provides an automated motor 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:

[0128] The bracket 770 is fitted onto the main body 731;

[0129] The second limiting protrusion 771 is provided at one end of the cylinder 760;

[0130] The third elastic element 772 is installed on the bracket 770, and one end is provided with a top bead 773 that abuts against the cylinder 760, and the other end abuts against the bracket 770;

[0131] The top bead 773 prevents the rotation of the cylinder 760 by abutting against the second limiting protrusion 771;

[0132] Meanwhile, the second limiting protrusion 771 can be bonded to the cylinder 760, and the third elastic element 772 can be a spring.

[0133] As can be seen from this embodiment, by using a top post to restrict the second limiting protrusion 771, the rotation of the cylinder 760 is restricted. When the force driving the cylinder 760 to rotate is sufficient to compress the third elastic element 772 and cause the second limiting protrusion 771 to push open the top bead 773, the cylinder 760 can rotate, thereby avoiding the jamming of the input end due to the jamming of the main body 731 and the screwdriver head 732, and effectively releasing the force at the input end. Example

[0134] This embodiment provides an automated motor 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 further includes:

[0135] A metal sheet 774 is fitted onto the main body 731 and has a tapered hole 775 that matches the top bead 773. The second limiting protrusion 771 is made of a non-conductive material.

[0136] It also includes a power supply and a current sensor, and the power supply, current sensor, metal sheet 774 and top bead 773 are connected in series in the closed-loop circuit.

[0137] Meanwhile, the specific structures of the power supply and current sensor are based on existing mature technologies. Specifically, they can be electrically connected using wires, which will not be elaborated here.

[0138] As can be seen from this embodiment, by setting the metal sheet 774 and making the second limiting protrusion 771 a non-conductive material, when the current sensor can detect the current in the closed-loop circuit, it is the normal tightening process. When the second limiting protrusion 771 pushes open the top bead 773, it causes the metal sheet 774 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 given, indicating that the bolt has completed the predetermined preload. Until the current sensors on all tightening components 73 have reported that the bolt has completed the predetermined preload, the input stops, that is, the drive motor 712 stops. This facilitates detection and ensures that all bolts have reached the preload, ensures the uniformity of bolt force, and improves the installation quality of the bolts. Example

[0139] This embodiment provides an automated motor assembly production line, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the support 770 includes:

[0140] The fixing part 7700 is connected to the first housing 710 and the metal plate 774 at both ends respectively;

[0141] The adjusting part 7701 is sleeved on the fixing part 7700 and threadedly connected to the fixing part 7700, and is used to adjust the deformation of the third elastic element 772.

[0142] The actuating part 7702 is sleeved on the adjusting part 7701 and rotatably connected to the second housing 730, and a sliding groove 7703 is provided on the inner wall along the axial direction;

[0143] The third limiting protrusion 7704 is provided on the surface of the adjusting part 7701 and is slidably connected to the slide groove 7703;

[0144] The fixing part 7700 can be made of non-conductive material, such as plastic, and the other metal sheets 774 are bonded together. The third limiting protrusion 7704 and the adjusting part 7701 can be an integral structure.

[0145] As can be seen from this embodiment, the stability of the metal sheet 774 is improved by the fixing part 7700, ensuring the separation of the metal sheet 774 from the top bead 773. The threaded connection of the adjusting part 7701 on the fixing part 7700 is adjusted by the actuating part 7702, causing the adjusting part 7701 to rise and fall along the fixing part 7700, thereby changing the deformation of the third elastic member 772. The setting of the third limiting protrusion 7704 and the slide groove 7703 facilitates the connection between the actuating part 7702 and the adjusting part 7701, improving the convenience of adjustment.

[0146] Example 10:

[0147] This embodiment provides an automated motor assembly production line, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and further includes:

[0148] The pallet 10 is located on the first circulating conveyor belt 1 and the second circulating conveyor belt 2, and is used for placing workpieces;

[0149] The first circulating conveyor belt 1 and the second circulating conveyor belt 2 each include two parallel conveyor belts 11, and the two ends of the pallet 10 are placed on the conveyor belts 11, while the lifting mechanism 9 is located between the two parallel conveyor belts 11 and is used to lift the pallet 10.

[0150] Meanwhile, the two parallel conveyor belts 11 used in the first circulating conveyor belt 1 and the second circulating conveyor belt 2 can be gear drive belts. The first circulating conveyor belt 1 and the second circulating conveyor belt 2 are also equipped with other auxiliary devices for the stable and precise movement of the pallet 10, such as infrared sensors, shock absorbers and drive rollers, and a rotating mechanism is set at the corner to change the conveying direction of the pallet 10. These are all existing technologies and are designed by those skilled in the art to achieve the stable and precise movement of the pallet 10. This application will not elaborate further.

[0151] As can be seen from this embodiment, by using the pallet 10, it is convenient to control the positional accuracy of the workpiece, and at the same time, it is convenient to leave a gap in the conveyor belt 11 to install the lifting mechanism 9. Thus, 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 the pallet 10 can pause briefly after reaching the predetermined position so that the lifting mechanism 9 can lift it, the conveyor belt 11 should also be equipped with a lifting baffle pushed by a cylinder or hydraulic pressure, or other means such as stopping the first circulating conveyor belt 1 / second circulating conveyor belt 2 to make the pallet 10 pause briefly at the predetermined position. These are all settings that can be actually required by those skilled in the art, and this application will not elaborate further.

[0152] This invention also provides an assembly process for an automated motor assembly production line, comprising the following steps:

[0153] S1: The loading robot 4 loads the machine casing and the front cover in sequence;

[0154] S2: Bolt installation mechanism 7 picks up bolts from bolt supply mechanism 8;

[0155] S3: The first circulating conveyor belt 1 transports the pallet 10 and the workpiece to the predetermined position, and the lifting mechanism 9 pushes the pallet 10 to be lifted.

[0156] S4: Bolt installation mechanism 7 installs bolts to achieve the connection and fixation between the front cover and the housing;

[0157] S5: The loading robot 4 flips the workpiece in S4 and loads it onto the pallet 10 on the second conveyor belt 11;

[0158] S6: The loading robot 4 loads the rotor and the rear cover in sequence;

[0159] S7: Bolt mounting mechanism 7 picks up a bolt from bolt supply mechanism 8;

[0160] S8: The second circulating conveyor belt 2 transports the pallet 10 and the workpiece to the predetermined position, and the lifting mechanism 9 pushes the pallet 10 to be lifted.

[0161] S9: Bolt installation mechanism 7 installs bolts to achieve the connection and fixation between the rear cover and the housing;

[0162] S10: The unloading robot 6 picks up the workpiece from S9 and places it onto the unloading conveyor belt 5;

[0163] The front cover, rear cover, rotor, housing, and stator inside the housing are all pre-assembled and installed separately, such as the bearings in the front / rear cover and the copper wires on the rotor.

[0164] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An automated motor assembly production line, characterized in that, include: The conveying mechanism includes a first circulating conveyor belt (1) and a second circulating conveyor belt (2), which are used for conveying workpieces during the installation of the front cover and rear cover of the motor housing, respectively. The loading mechanism is located on the side of the conveying mechanism and includes 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 includes an unloading conveyor belt (5) and an unloading robot (6), and is used for unloading work. The bolt installation mechanism (7) includes a frame (70), a head (71) and a cantilever (72) connecting the frame (70) and the head (71). The frame (70) is provided with a rotating component for driving the cantilever (72) to rotate and a lifting component for lifting. The head (71) is provided with multiple tightening components (73) corresponding to the bolt installation positions on the workpiece. A bolt supply mechanism (8) is located on the side of the bolt mounting mechanism (7) and is used to supply bolts to the bolt mounting mechanism (7); The lifting mechanism (9) is installed inside the conveying mechanism and is used to lift the workpiece during bolt installation.

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

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

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

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

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

7. The automatic motor assembly production line according to claim 6, characterized in that, The overload protection structure (77) includes: The bracket (770) is fitted onto the main body (731); The second limiting protrusion (771) is provided at one end of the cylinder (760); The third elastic element (772) is installed on the bracket (770), and one end is provided with a top bead (773) that abuts against the cylinder (760), and the other end abuts against the bracket (770); The top bead (773) prevents the rotation of the cylinder (760) by abutting against the second limiting protrusion (771).

8. The automatic motor assembly production line according to claim 7, characterized in that, The overload protection structure (77) also includes: A metal sheet (774) is fitted onto the main body (731) and has a tapered hole (775) that matches the top bead (773). The second limiting protrusion (771) is made of a non-conductive material. It also includes a power supply and a current sensor, and the power supply, current sensor, metal sheet (774) and top bead (773) are connected in series in the closed-loop circuit.

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

10. The automatic motor assembly production line according to claim 1, characterized in that, Also includes: The pallet (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) each include two parallel conveyor belts (11), and the two ends of the pallet (10) are placed on the conveyor belts (11), while the lifting mechanism (9) is located between the two parallel conveyor belts (11) and is used to lift the pallet (10).

Images