Turntable screw locking machine

Abstract

The utility model discloses a turntable screw locking machine. A carrier is arranged on a turntable; the driving device is used for driving the turntable to rotate around the own central axis; the transfer driving mechanism is used for driving the adsorption rotating assembly to controllably move to the position above the carrier or away from the carrier; the adsorption rotating assembly comprises a seat body, an adsorption head, a rotating rod and a driver; the adsorption head slides up and down relative to the seat body and has a first stroke; an adsorption surface is arranged on the bottom surface of the adsorption head, and a negative pressure channel extending up and down is arranged in the adsorption head; air holes are formed in the adsorption surface at the lower end of the negative pressure channel; the rotating rod is movably inserted into the negative pressure channel, and the lower end forms a bit end; the rotating rod is in clearance fit connection with the top end of the negative pressure channel; the driver is used for driving the rotating rod to rotate; the up-down driving mechanism is used for driving the base to move up and down. The screw assembling device can achieve continuous operation of screw assembling, reduces manual participation, is high in screw assembling efficiency, saves time and labor, and effectively meets the screw assembling requirement.

Description

Technical Field

[0001] This utility model relates to the field of electronic processing technology, and in particular to a rotary screw fastening machine. Background Technology

[0002] In electronic components, some parts are secured together with screws. For example, a heatsink and its base are secured with screws, as are the heatsink base and the circuit board. These screws are often installed manually, using electric screwdrivers or manual screwdrivers. This process is inefficient, time-consuming, and labor-intensive. Manual assembly cannot guarantee consistent screw torque, leading to screws being either too tight or too loose, affecting connection stability. Furthermore, there is a risk of missing screws, making it difficult to effectively meet screw assembly requirements. Utility Model Content

[0003] To address the aforementioned technical problems, the purpose of this utility model is to propose a rotary screw fastening machine that enables continuous screw assembly, reduces manual intervention, achieves high screw assembly efficiency, saves time and labor, effectively meets screw assembly needs, and is highly practical.

[0004] The technical solution of this utility model is achieved as follows: a rotary screw fastening machine, including a rotary table, a carrier, a drive device, an assembly mechanism, and a negative pressure device;

[0005] The carrier is mounted on a turntable and is used to carry and position the workpiece;

[0006] The drive device is used to drive the turntable to rotate around its own central axis so as to move the carrier through the assembly station.

[0007] The assembly mechanism is arranged corresponding to the assembly station and includes an adsorption rotation component, a transfer drive mechanism, and an up-down drive mechanism.

[0008] The transfer drive mechanism is used to drive the adsorption rotating assembly to move in a controlled manner to reach above or away from the carrier;

[0009] The adsorption rotation assembly includes a base, an adsorption head, a rotating rod, and a driver;

[0010] The adsorption head slides up and down relative to the base body and has a first stroke; the bottom surface of the adsorption head is provided with an adsorption surface, and the inside is provided with a negative pressure channel extending up and down; the lower end of the negative pressure channel forms an air hole on the adsorption surface;

[0011] The rotating rod is movably inserted into the negative pressure channel, and its lower end forms a bit end that mates with the screw; the rotating rod is connected to the top of the negative pressure channel with a clearance fit.

[0012] The driver is mounted on the base and is used to drive the rotating rod to rotate;

[0013] The up-and-down drive mechanism is used to drive the seat to move up and down;

[0014] The negative pressure device is connected to the negative pressure channel.

[0015] Furthermore, the transfer drive mechanism has degrees of freedom to move along the X-axis and Y-axis directions.

[0016] Furthermore, the carriers are arranged in several groups at intervals along the circumference of the turntable.

[0017] Furthermore, at least two assembly stations are arranged at intervals along the circumference of the turntable; an assembly mechanism is arranged for each assembly station.

[0018] Furthermore, the seat is provided with a first limiting member for restricting the downward movement of the adsorption head; the first limiting member is located at the lower end of the first stroke.

[0019] Furthermore, the drive end of the up-down drive mechanism is provided with a support seat; the seat body moves up and down relative to the support seat and has a second stroke.

[0020] Furthermore, the support seat is provided with second limiting members on the upper and lower sides of the seat body to restrict the movement of the seat body; the two second limiting members form the two strokes.

[0021] Furthermore, the up-and-down driving mechanism is mounted on the transfer driving mechanism.

[0022] Furthermore, the rotary screw fastening machine includes a feeding and detection mechanism;

[0023] An assembly station is located upstream of the assembly station; the turntable rotates around its own central axis and passes sequentially through the assembly station and the assembly station; the loading detection mechanism is located corresponding to the loading station and is used to detect the position of the screw holes of the workpiece on the carrier.

[0024] Furthermore, the rotary screw fastening machine includes a material feeding and detection mechanism;

[0025] A material unloading station is arranged downstream of the assembly station; the turntable rotates around its own central axis and passes sequentially through the assembly station and the material unloading station; the material unloading detection mechanism is arranged corresponding to the material unloading station and is used to detect the position of the screw holes of the workpiece on the carrier.

[0026] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0027] 1. This utility model utilizes the rotation of a turntable to continuously transport workpieces. With the assistance of an assembly mechanism, an adsorption head picks up screws via vacuum adsorption. Driven by a transfer mechanism, the adsorption head moves to the top of the carrier, aligning the screw with the screw hole on the workpiece. Driven by an up-and-down mechanism, the screw is inserted into the screw hole on the workpiece. Finally, a rotating rod rotates the screw, locking it into the screw hole. This combination enables continuous screw assembly, reducing manual intervention, increasing assembly efficiency, saving time and labor, effectively meeting screw assembly needs, and demonstrating strong practicality.

[0028] 2. In this invention, the suction head can move freely up and down relative to the base within the first stroke. During screw suction, the suction head moves downwards to the lower end of the first stroke under its own gravity, causing the rotating rod to retract into the negative pressure channel, thereby preventing the rotating rod from interfering with the screw suction process. The driver and rotating rod as a whole can move freely up and down relative to the base within the second stroke. During screw tightening, the rotating rod contacts the screw, and the rotating rod and driver as a whole move up and down to prevent the rotating rod from rigidly colliding with the screw and damaging it, and to maintain the downward pressure on the screw, improving the smoothness of screw tightening and making it highly practical. Attached Figure Description

[0029] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0030] Figure 1 This is a three-dimensional structural diagram of the overall structure of this utility model;

[0031] Figure 2 for Figure 1 A top view structural diagram;

[0032] Figure 3 This is a three-dimensional structural schematic diagram of the assembly mechanism of this utility model;

[0033] Figure 4 This is a three-dimensional structural diagram of the adsorption rotation component and the upper and lower drive mechanism of this utility model.

[0034] Figure 5 for Figure 4 Main view structural diagram;

[0035] Figure 6 for Figure 4 A side view structural diagram;

[0036] Figure 7 This is an assembly diagram of the rotating rod and the suction head of this utility model;

[0037] The components are as follows: 1. Turntable; 11. Carrier; 2. Assembly mechanism; 3. Transfer drive mechanism; 4. Up and down drive mechanism; 41. Bearing seat; 42. Second limiting member; 5. Seat body; 51. Adsorption head; 511. Adsorption surface; 512. Negative pressure channel; 513. Air hole; 514. Connecting hole; 52. Rotating rod; 53. Driver; 54. Bearing; 55. Fixed seat; 56. First limiting member; 6. Feeding detection mechanism; 7. Unloading detection mechanism. Detailed Implementation

[0038] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0039] like Figure 1-7 The diagram illustrates a rotary screw fastening machine (1) as described in this embodiment. This rotary screw fastening machine is suitable for screw assembly operations between workpieces connected by screws. The screws in this embodiment are conventional components of the prior art. The rotary screw fastening machine includes a rotary table 1, a carrier 11, a drive device, an assembly mechanism 2, and a negative pressure device. The central axis of the rotary table 1 is mounted on a base via bearings, allowing it to rotate around a vertically extending central axis. The carrier 11 is arranged on the rotary table 1 to move with it. The carrier 11 is used to carry and position the workpiece. Specifically, the carrier 11 has a positioning structure adapted to the workpiece, allowing the workpiece to be placed on the carrier 11 and positioned by the positioning structure, enabling the workpiece to move with the rotary table 1 on the carrier 11. Depending on actual needs, several sets of carriers 11 are arranged at intervals along the circumference of the rotary table 1. The aforementioned drive device is connected to the central axis of the rotary table 1 and drives the rotary table 1 to rotate around its own central axis, thereby causing the carrier 11 to sequentially pass through the loading station, assembly station, and unloading station. The loading station, assembly station, and unloading station are all arranged at intervals on the side of the turntable 1. The drive device is a stepper motor of existing technology.

[0040] In this embodiment, the aforementioned assembly mechanism 2 is arranged corresponding to the assembly station and includes an adsorption rotation component, a transfer drive mechanism 3, and a vertical drive mechanism 4. The transfer drive mechanism 3 is fixed to the base. This transfer drive mechanism 3 is used to drive the adsorption rotation component to move in a controlled manner to or away from the carrier 11. The vertical drive mechanism 4 is used to drive the adsorption rotation component to move up and down. Specifically, the vertical drive mechanism 4 is connected to the transfer drive mechanism 3, and the adsorption rotation component is connected to the vertical drive mechanism 4. In the specific structural design, the transfer drive mechanism 3 is a conventional device of the prior art, which has degrees of freedom of movement along the X-axis and Y-axis directions. Specifically, the transfer drive mechanism 3 includes a first linear motion mechanism and a second linear motion mechanism. The driving end of the first linear motion mechanism moves along the X-axis direction, and the driving end of the second linear motion mechanism moves along the Y-axis direction. The second linear motion mechanism is connected to the first linear motion mechanism to drive the second linear motion mechanism to move along the X-axis direction, while the second linear motion mechanism drives the vertical drive mechanism 4 to move along the Y-axis direction. The aforementioned first linear motion mechanism, second linear motion mechanism, and up-down drive mechanism 4 are all conventional devices in the prior art, and all have a drive end that moves in a straight line.

[0041] In this embodiment, the aforementioned adsorption rotation assembly includes a base 5, an adsorption head 51, a rotating rod 52, and a driver 53. The base 5 is connected to the drive end of the up-down driving mechanism 4, thereby enabling it to move up and down. A fixed seat 55 is mounted on the base 5 via a track, allowing it to slide up and down relative to the base 5. The adsorption head 51 is fixedly mounted on the fixed seat 55, allowing the adsorption head 51 to slide up and down relative to the base 5, thus having a first stroke. A first limiting member 56 is fixedly mounted on the base 5 to restrict the downward movement of the adsorption head 51. This first limiting member 56 is located at the lower end of the first stroke. When the fixed seat 55 moves downward, it contacts the first limiting member 56 vertically. When the fixed seat 55 moves upward, it contacts a preset position on the base 5, thereby restricting the upward movement of the adsorption head 51 to form the upper end of the first stroke.

[0042] The suction head 51 has an adsorption surface 511 formed on its bottom surface, which can adsorb and adhere to the top surface of the screw. The suction head 51 has a vertically extending negative pressure channel 512 machined inside, and a connecting hole 514 communicating with the negative pressure channel 512 on its outer wall. An air hole 513 is formed on the adsorption surface 511 at the lower end of the negative pressure channel 512. The screw can be adsorbed onto the adsorption surface 511 through the air hole 513. An assembly hole is formed on the top surface of the suction head 51 at the upper end of the negative pressure channel 512. The aforementioned rotating rod 52 extends vertically and is movably inserted into the negative pressure channel 512, with its lower end forming a screwdriver bit end that mates with the screw. The upper end of the rotating rod 52 protrudes from the suction head 51 through the assembly hole. The screwdriver bit end can be inserted into the head groove of the bolt. A bearing 54 is installed in the aforementioned assembly hole. The rotating rod 52 is inserted into the inner hole of the bearing 54 with a clearance fit. The bearing 54 guides the rotating rod 52 to move up and down, and reduces the air leakage space at the top of the negative pressure channel 512, so as to facilitate the suction of the screw by vacuuming.

[0043] The aforementioned driver 53 is fixed to the base 5 and is connected to the upper end of the rotating rod 52 for driving the rotating rod 52 to rotate. The driver 53 is a conventional motor. Through this structural design, when the fixed base 55 slides up and down relative to the base 5, the bit end of the rotating rod 52 can enter and exit the negative pressure channel 512 through the air hole 513, and the driver 53 can drive the rotating rod 52 to rotate within the negative pressure channel 512. The aforementioned negative pressure device is a conventional component of the prior art, preferably a vacuum pump, which is connected to the connecting hole 514 to perform air extraction on the negative pressure channel 512, thereby generating negative pressure at the air hole 513, which can then attract screws.

[0044] In the specific structural design, a feeding device is provided for the corresponding assembly station. This feeding device is a conventional device in the prior art, preferably a vibratory feeder. The feeding device has a feeding position that positions the screws in a preset posture. The aforementioned transfer drive mechanism 3 drives the adsorption rotation assembly to move between the feeding device and the carrier 11, so that the adsorption head 51 can adsorb the screws at the feeding position and transfer them to the carrier 11.

[0045] In this configuration, two or more assembly stations are arranged at intervals along the circumference of the turntable 1. Each assembly station is equipped with an assembly mechanism 2. By arranging several assembly mechanisms 2, batch screw-tightening operations can be performed.

[0046] In this embodiment, a support base 41 is fixed to the drive end of the aforementioned up-and-down driving mechanism 4. The seat body 5 is slidably mounted on the support base 41 via a track, allowing the seat body 5 to move up and down relative to the support base 41, thus having a second stroke. In a specific structural design, second limiting members 42 for restricting the movement of the seat body 5 are installed on the support base 41 on the upper and lower sides. When the seat body 5 slides up and down, the two second limiting members 42 restrict the up-and-down movement of the seat body 5, thereby forming a second stroke between the two second limiting members 42.

[0047] In this embodiment, the rotary screw fastening machine 1 includes a loading detection mechanism 6 and a unloading detection mechanism 7. The loading detection mechanism 6 is arranged at the loading station and is used to detect the screw hole positions of the workpieces on the carrier 11. At the loading station, if the screw hole positions of the workpieces on the carrier 11 are inaccurate, the rotary table 1 is controlled to stop rotating. When the screw hole positions are accurate, the rotary table 1 is allowed to continue rotating. The unloading detection mechanism 7 is arranged at the unloading station and is used to detect the screw hole positions of the workpieces on the carrier 11. At the unloading station, when it is detected that the preset screw hole positions of the workpieces on the carrier 11 are fully or partially equipped with screws, a signal is output. Both the loading detection mechanism 6 and the unloading detection mechanism 7 include a CCD camera. The CCD camera is arranged facing the carrier 11. It acquires images of the workpieces on the carrier 11 to determine whether the screw hole positions are accurate and whether all preset screw hole positions are equipped with screws.

[0048] In this embodiment, a control program is provided to control the movement of the transfer drive mechanism 3, the up-down drive mechanism 4, and the driver 53. The transfer drive mechanism 3 can drive the adsorption rotation assembly to several preset positions above the carrier 11, so that the adsorption head 51 corresponds vertically to several screw holes of the workpiece on the carrier 11.

[0049] In practical use, at the loading station, the workpiece is assembled onto the carrier 11. The rotation of the turntable 1 sequentially transfers the workpieces from the carrier 11 to the assembly station and the unloading station. At the assembly hole, the suction head 51 can pick up screws via vacuum suction. Driven by the transfer drive mechanism 3, the suction head 51 moves to a preset position above the carrier 11, aligning the screw with the screw hole on the workpiece. Driven by the up-and-down mechanism, the screw is inserted into the screw hole on the workpiece, and the rotating rod 52 rotates, causing the screw to rotate and lock into the screw hole. The suction head 51 can move freely up and down relative to the base 5 within a first stroke. During screw suction, the suction head 51 moves downwards to the lower end of the first stroke under its own gravity, causing the rotating rod 52 to retract into the negative pressure channel 512, thus preventing the rotating rod 52 from interfering with the screw suction process. The driver 53 and the rotating rod 52 as a whole can move freely up and down relative to the base 5 within a second stroke. During the screw tightening process, the rotating rod 52 comes into contact with the screw, and the rotating rod 52 and the driver 53 move up and down as a whole to prevent the rotating rod 52 from rigidly colliding with the screw and damaging the screw, and to maintain the downward pressure on the screw, thereby improving the smoothness of screw tightening. The combination of the above methods can realize continuous operation of screw assembly, reduce manual intervention, and achieve high screw assembly efficiency, saving time and effort, effectively meeting the screw assembly needs, and is highly practical.

[0050] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A rotary screw fastening machine, comprising a rotary table, a carrier, a drive unit, an assembly mechanism, and a negative pressure device; characterized in that: The carrier is mounted on a turntable and is used to carry and position the workpiece; The drive device is used to drive the turntable to rotate around its own central axis so as to move the carrier through the assembly station. The assembly mechanism is arranged corresponding to the assembly station and includes an adsorption rotation component, a transfer drive mechanism, and an up-down drive mechanism. The transfer drive mechanism is used to drive the adsorption rotating assembly to move in a controlled manner to reach above or away from the carrier; The adsorption rotation assembly includes a base, an adsorption head, a rotating rod, and a driver; The adsorption head slides up and down relative to the base body and has a first stroke; the bottom surface of the adsorption head is provided with an adsorption surface, and the inside is provided with a negative pressure channel extending up and down; the lower end of the negative pressure channel forms an air hole on the adsorption surface; The rotating rod is movably inserted into the negative pressure channel, and its lower end forms a bit end that mates with the screw; the rotating rod is connected to the top of the negative pressure channel with a clearance fit. The driver is mounted on the base and is used to drive the rotating rod to rotate; The up-and-down drive mechanism is used to drive the seat to move up and down; The negative pressure device is connected to the negative pressure channel.

2. The rotary screw fastening machine according to claim 1, characterized in that: The transfer drive mechanism has degrees of freedom to move along the X-axis and Y-axis.

3. A rotary screw fastening machine according to claim 1, characterized in that: The vehicles are arranged in several groups at intervals along the circumference of the turntable.

4. A rotary screw fastening machine according to claim 1, characterized in that: At least two assembly stations are arranged at intervals along the circumference of the turntable; an assembly mechanism is arranged for each assembly station.

5. A rotary screw fastening machine according to claim 1, characterized in that: The seat is provided with a first limiting member for restricting the downward movement of the adsorption head; the first limiting member is located at the lower end of the first stroke.

6. A rotary screw fastening machine according to claim 1, characterized in that: The drive end of the up-down drive mechanism is provided with a support seat; the seat body moves up and down relative to the support seat and has a second stroke.

7. A rotary screw fastening machine according to claim 6, characterized in that: The support seat is provided with second limiting members on the upper and lower sides of the seat body to restrict the movement of the seat body; the two second limiting members form the two strokes.

8. A rotary screw fastening machine according to claim 1, characterized in that: The up-and-down drive mechanism is mounted on the transfer drive mechanism.

9. A rotary screw fastening machine according to claim 1, characterized in that: The rotary screw fastening machine includes a feeding and inspection mechanism; An assembly station is located upstream of the assembly station; the turntable rotates around its own central axis and passes sequentially through the assembly station and the assembly station; the loading detection mechanism is located corresponding to the loading station and is used to detect the position of the screw holes of the workpiece on the carrier.

10. A rotary screw fastening machine according to claim 1, characterized in that: The rotary screw fastening machine includes a material feeding and detection mechanism; A material unloading station is arranged downstream of the assembly station; the turntable rotates around its own central axis and passes sequentially through the assembly station and the material unloading station; the material unloading detection mechanism is arranged corresponding to the material unloading station and is used to detect the position of the screw holes of the workpiece on the carrier.

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