Automatic screwing device for pressure type temperature controller switch box

Abstract

The application relates to the technical field of temperature control switch processing, and particularly discloses an automatic screwing device for a pressure type temperature controller switch box, which comprises a feeding assembly, a sorting assembly, a feeding assembly and a screwing assembly. The feeding assembly is used for conveying workpieces to be locked; the sorting assembly is used for arranging and outputting screws; the feeding assembly is used for receiving the screws output by the sorting assembly and outputting single screws; and the screwing assembly is used for obtaining the single screws output by the feeding assembly and locking the single screws into threaded holes of the workpieces. The application has the effect of improving the problem of low processing efficiency of the existing temperature control switch processing equipment.

Description

Technical Field

[0001] This application relates to the technical field of temperature control switch processing equipment, and in particular to an automatic screw-driving device for a pressure-type temperature controller switch box. Background Technology

[0002] During the production and assembly of pressure-type temperature controller switch boxes, multiple screws typically need to be tightened on the end caps or bases. In current common operations, the conveying and positioning of workpieces, the sorting and arrangement of screws, the supply of individual screws, and the final tightening often rely on manual intervention, resulting in a fragmented operation mode with low efficiency.

[0003] The manual and mechanical screw-tightening operation is limited by the operator's skill and physical strength. The repeated actions of picking up screws, aligning holes and controlling torque are time-consuming, and the assembly output per unit time is limited, making it difficult to match the cycle time requirements of large-scale production. Summary of the Invention

[0004] To address the issue of low processing efficiency in existing temperature control switch processing equipment, this application provides an automatic screw-driving device for pressure-type temperature controller switch boxes.

[0005] The automatic screw-driving device for a pressure-type thermostat switch box provided in this application adopts the following technical solution: An automatic screw-driving device for a pressure-type thermostat switch box includes: The feeding assembly is used to transport the workpieces to be locked. The sorting component is used to arrange and output the screws; A supply component is used to receive the screws output by the sorting component and output a single screw. The tightening assembly is used to obtain a single screw output by the supply assembly and to fasten the single screw into the threaded hole of the workpiece.

[0006] By adopting the above technical solutions, the feeding component can transport the workpieces to be fastened to the fastening station, replacing manual handling and positioning, reducing the time of human-induced interruptions in workpiece loading and unloading, enabling continuous fastening operations, and increasing output per unit time. The sorting component can automatically arrange the scattered screws into an orderly queue and continuously output them, ensuring the continuity and posture of the screws, avoiding feeding interruptions caused by manual material handling, eliminating process breakpoints, and receiving the arranged screw queues and separating them one by one, outputting only one screw at a time, so that the tightening component has one screw waiting for each time it picks up a material, eliminating the idle travel time while waiting for screws, and making the action connection more compact. The tightening component can pick up a single screw and screw it into the threaded hole of the workpiece, completing the actions of picking up, aligning and tightening, making the fastening action more standardized, reducing the time of a single fastening process, and improving the problem of low processing efficiency of existing temperature control switch processing equipment.

[0007] Preferably, the feeding assembly includes a conveyor belt, a first cylinder, and a second cylinder. The conveyor belt is used to transport the workpiece to be fastened. The first cylinder is located on one side near the discharge end of the conveyor belt and is used to push the workpiece to be fastened into the working range of the tightening assembly for fastening. The second cylinder is located on one side of the conveyor belt and is used to push the fastened workpiece out of the working range of the tightening assembly.

[0008] By adopting the above technical solution, the conveyor belt can transport the workpiece to be locked to a position close to the tightening component, reducing the workpiece supply interval time and ensuring a continuous flow of workpieces. The first cylinder can push the workpiece on the conveyor belt into the working range of the tightening component, realizing the transfer and positioning of the workpiece, avoiding the tightening component waiting for the workpiece to arrive before it can work. The second cylinder can push the workpiece that has completed the locking process out of the working range of the tightening component, thereby clearing the locking processing position and making room for the next workpiece to be locked. This makes the connection between loading and unloading and locking processing close, reduces the idle time of the equipment, and further improves the problem of low processing efficiency of existing temperature control switch processing equipment.

[0009] Preferably, the sorting component includes a vibratory feeder and a feed channel. The vibratory feeder is provided with a spirally ascending directional track for arranging screws. The feed end of the feed channel is connected to the discharge end of the vibratory feeder, and the discharge end of the feed channel extends to the supply component. The feed channel is used to transport the arranged screws to the supply component.

[0010] By adopting the above technical solution, the vibratory feeder can cause a number of scattered screws to climb and arrange along a spiral track through vibration, transforming manual material handling into continuous output, reducing the risk of material supply interruption, and ensuring that there are always screws available. The spiral upward direction selection track can screen and unify the posture and orientation of the screws during the screw climbing process, ensuring that the posture of each screw entering the material channel is similar, avoiding material jamming and machine stoppage due to incorrect posture during subsequent material picking or tightening, and reducing the time spent on abnormal interruptions. The material channel can send the arranged screws from the vibratory feeder outlet to the supply component inlet, forming a channel between the sorting component and the supply component, ensuring the flow of the arranged screws, so that the supply component always has screws available for picking up, avoiding idle waiting, and further improving the problem of low processing efficiency of existing temperature control switch processing equipment.

[0011] Preferably, the supply assembly includes a distributor, a conveying pipe, and a limiting gripper. The distributor is located on one side near the discharge end of the material channel, and the inlet of the distributor is opposite to the outlet of the material channel. The distributor is used to push out the screws arranged in the material channel one by one in sequence. The conveying pipe is located on one side of the distributor and is connected to the outlet of the distributor. The conveying pipe is used to convey a single screw. The limiting gripper is located at the discharge end of the conveying pipe and is used to limit the position of a single screw.

[0012] By adopting the above technical solution, the feeder can separate and push out the screws arranged in the feed channel one by one, so as to output only one screw at a time. This ensures that the tightening component picks up only one screw each time, avoiding the jamming or even machine stoppage caused by multiple screws being output at the same time, and ensuring the continuity of operation. The conveying pipe can quickly transport the single screw pushed out by the feeder to the limit gripper, shortening the conveying time of the screw from the separation point to the position to be picked up. This ensures that the single screw has reached the bottom of the conveying pipe before the tightening component resets, reducing the waiting time of the tightening component. The limit gripper can restrict the position of the single screw at the outlet of the conveying pipe, providing a single screw for the tightening component, eliminating the failure to pick up or the time consumption of alignment caused by the screw's positioning deviation, improving the success rate of a single picking action, and further improving the problem of low processing efficiency of existing temperature control switch processing equipment.

[0013] Preferably, the tightening assembly includes a screw clamp, an electric screwdriver, and a third cylinder. The screw clamp has a through hole along the axial direction and is used to accommodate and hold a single screw. The screwdriver bit is used to insert into the through hole and rotate the screw. The third cylinder is used to drive the electric screwdriver to move linearly in the vertical direction.

[0014] By adopting the above technical solution, the screw clamp can accommodate and hold a single screw, keeping the screw stable during movement and ensuring that it does not fall or deviate during transfer. This reduces downtime for rework due to a single screw falling off, ensuring the continuity and flow of the fastening process. The electric screwdriver can screw the screw into the threaded hole of the workpiece by rotating the bit. With controllable rotation speed, the fastening process is ensured to be not too long. The third cylinder can drive the electric screwdriver to make linear reciprocating motion in the vertical direction, realizing the downward engagement and reset after fastening, reducing the proportion of non-tightening action time, and further improving the problem of low processing efficiency of existing temperature control switch processing equipment.

[0015] Preferably, the inner wall of the screw clamp is provided with a groove, and a limiting member is provided in the groove to restrict the free fall of the screw.

[0016] By adopting the above technical solution, the groove on the inner wall of the screw clamp can provide installation space for the limiting component. The limiting component can block a single screw in the non-locking state, preventing the single screw from falling freely from the screw clamp and coming out of the screw clamp, thus reducing the failure of material picking and repeated material picking caused by a single screw falling in the middle.

[0017] Preferably, the screw clamp is configured to rotate freely around its own central axis.

[0018] By adopting the above technical solution, the screw clamp can rotate synchronously with the screw and the bit when the electric screwdriver is rotating and locking, eliminating the circumferential sliding friction between the inner wall of the clamp and the screw head, making the screw screwing process smoother, reducing rotational resistance, and shortening the screwing time for a single locking operation.

[0019] Preferably, it also includes a lever assembly disposed on one side of the tightening assembly, for driving the screw chuck to make an arc movement in the horizontal direction, so that the screw chuck is opposite to the limiting jaw or the electric screwdriver.

[0020] By adopting the above technical solution, the lever assembly enables the screw clamp to alternately face the limiting jaw or electric screwdriver, realizing a rapid switch between the material picking position and the locking position. After the material is picked up, the clamp can be transferred to the electric screwdriver without moving the whole machine, shortening the station changeover time and compressing the cycle.

[0021] Preferably, the lever assembly includes a fourth cylinder and a lever shaft, the output end of the fourth cylinder is hinged to the lever shaft, and the lever shaft rotates around the shaft via a rotating axis.

[0022] By adopting the above technical solution, the fourth cylinder can provide the power source to drive the lever shaft to swing. One end of the lever shaft is hinged to the output end of the fourth cylinder, and the other end is linked to the screw clamp. This can convert the linear motion of the cylinder into the arc swing of the screw clamp. The rotating shaft serves as the rotation fulcrum of the lever shaft, enabling the lever shaft to rotate around it, providing a stable swing center, ensuring that the end position of the screw clamp swing is consistent, and reducing the problem of long alignment time caused by positioning deviation.

[0023] Preferably, the assembly also includes a workbench for supporting the feeding assembly, sorting assembly, supply assembly, and tightening assembly. The workbench has a discharge port located on one side of the feeding assembly.

[0024] By adopting the above technical solution, the workbench can provide an installation support foundation for each component, ensuring that the relative positions of the four components of feeding, sorting, supplying and tightening are fixed. The unified positioning reference of each component can reduce the deviation of action connection caused by assembly error, avoid repeated debugging or machine stoppage due to misalignment, and ensure the stability of continuous operation. The unloading port set on one side of the feeding component can allow the locked workpiece to fall down without manual removal or additional handling device. The time for workpiece to flow out is close to zero, thereby eliminating the efficiency breakpoint at the end of the process.

[0025] In summary, this application includes at least one of the following beneficial technical effects: The feeding component can transport the workpieces to be fastened to the fastening station, replacing manual handling and positioning, reducing the time of human interruption in workpiece loading and unloading, enabling continuous fastening operations, and increasing output per unit time. The sorting component can automatically arrange the scattered screws into an orderly queue and output them continuously, ensuring the continuity and posture of the screws, avoiding the feeding interruption caused by manual material handling, and eliminating process breakpoints. The supply component can receive the arranged screw queue and separate them one by one, outputting only one screw at a time, so that the tightening component has one screw waiting for each time it picks up the material, eliminating the idle travel time of waiting for screws, and making the action connection more compact. The tightening component can pick up the single screw and screw it into the threaded hole of the workpiece, completing the actions of picking up, aligning and tightening. The fastening action is more standardized, reducing the time of a single fastening process and improving the problem of low processing efficiency of existing temperature control switch processing equipment. The conveyor belt can transport the workpiece to be fastened to a position close to the tightening component, reducing the workpiece supply interval and ensuring a continuous flow of workpieces. The first cylinder can push the workpiece on the conveyor belt into the working range of the tightening component, realizing the transfer and positioning of the workpiece, avoiding the tightening component waiting for the workpiece to arrive before it can work. The second cylinder can push the workpiece that has completed the fastening process out of the working range of the tightening component, thereby clearing the fastening processing position and making room for the next workpiece to be fastened. This makes the connection between loading and unloading and fastening processing close, reduces the idle time of the equipment, and further improves the problem of low processing efficiency of existing temperature control switch processing equipment. The vibratory feeder uses vibration to cause scattered screws to climb and arrange along a spiral track, transforming manual material handling into continuous output. This reduces the risk of supply interruption and ensures that screws are always available. The spiraling, directional track filters and unifies the screws' posture and orientation during the climbing process, ensuring that each screw entering the feed channel has a similar posture. This avoids jamming and machine stoppages due to incorrect posture during subsequent material retrieval or tightening, reducing the time spent on abnormal interruptions. The feed channel transports the arranged screws from the vibratory feeder outlet to the supply component inlet, forming a channel between the sorting and supply components. This ensures the fluidity of the arranged screws, allowing the supply component to always have screws available, avoiding waiting periods, and further improving the low processing efficiency of existing temperature control switch processing equipment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the automatic screw-driving device for the pressure-type thermostat switch box in the embodiments of this application.

[0027] Figure 2 This is a schematic diagram of the feeding component in the embodiments of this application; Figure 3 This is a schematic diagram of the sorting component in the embodiments of this application; Figure 4 This is a schematic diagram of the supply component in an embodiment of this application; Figure 5 This is a schematic diagram of the lever assembly in the embodiments of this application; Figure 6 This is a schematic diagram of the screw clamp structure in an embodiment of this application; Figure 7 This is a schematic diagram of the screw clamp in another embodiment of this application.

[0028] Explanation of reference numerals in the attached diagram: 1. Feeding assembly; 11. Conveyor belt; 12. First cylinder; 13. Second cylinder; 2. Sorting assembly; 21. Vibratory feeder; 22. Material channel; 3. Supply assembly; 31. Distributor; 32. Conveying pipe; 33. Limiting gripper; 4. Tightening assembly; 41. Screw clamp; 42. Electric screwdriver; 43. Third cylinder; 5. Lever assembly; 51. Fourth cylinder; 52. Lever shaft; 6. Workbench. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1 To be continued Figure 7 This application will be described in further detail.

[0030] This application discloses an automatic screw-driving device for a pressure-type thermostat switch box. (Refer to...) Figure 1The automatic screw-driving equipment for pressure thermostat switch boxes includes a feeding assembly 1, a sorting assembly 2, a supply assembly 3, a tightening assembly 4, a lever assembly 5, and a worktable 6.

[0031] like Figure 2 As shown, the feeding component 1 is used to transport the workpiece to be locked, and can transport the workpiece to be locked to the locking station, replacing manual handling and positioning, reducing the human interruption time of workpiece loading and unloading, enabling the locking process to be carried out continuously, and improving the problem of low processing efficiency of existing temperature control switch processing equipment.

[0032] In this embodiment of the application, the feeding assembly 1 includes a conveyor belt 11, a first cylinder 12, and a second cylinder 13. The conveyor belt 11 is used to transport the workpiece to be locked. The first cylinder 12 is located on one side near the discharge end of the conveyor belt 11. The first cylinder 12 is used to push the workpiece to be locked into the working range of the tightening assembly 4 for locking. The second cylinder 13 is located on one side of the conveyor belt 11 and is used to push the locked workpiece out of the working range of the tightening assembly 4. Specifically, in existing locking processes, there is a lack of efficient action coordination between workpiece loading / unloading and locking actions. When the first cylinder 12 pushes in the workpiece, the tightening component 4 is often in a standby state, while when the second cylinder 13 pushes out the workpiece, the tightening component 4 has already completed locking and reset. The two overlap in time. The conveyor belt 11 can transport the workpiece to be locked to a position close to the tightening component 4, reducing the workpiece supply interval and ensuring a continuous flow of workpieces. The first cylinder 12 can push the workpiece on the conveyor belt 11 into the working range of the tightening component 4, realizing the transfer and positioning of the workpiece and avoiding the tightening component 4 waiting for the workpiece to arrive before it can work. The second cylinder 13 can push the workpiece that has completed the locking process out of the working range of the tightening component 4, thereby clearing the locking processing position and making room for the next workpiece to be locked.

[0033] Specifically, the pushing direction of the first cylinder 12 is perpendicular to the pushing direction of the second cylinder 13. Their movement paths are not collinear, but their working areas are adjacent. This allows the second cylinder 13 to initiate the action of pushing the old workpiece out along a second direction perpendicular to the first direction at the end of the stroke when the first cylinder 12 pushes the new workpiece into the locking position, without any movement interference. The timing of the two cylinders' actions can thus be partially overlapped in control, compressing the total auxiliary time for workpiece switching to a shorter time than the sum of the times for the two cylinders to move sequentially and independently. This results in a tighter connection between loading / unloading and locking processing, reduces equipment idle time, and improves the low processing efficiency of existing temperature-controlled switch processing equipment due to excessively long workpiece switching times.

[0034] like Figure 3As shown, the sorting component 2 is used to arrange and output the screws, so that the scattered screws are automatically arranged into an orderly queue and continuously output, ensuring the continuity and posture of the screws, avoiding the feeding interruption caused by manual material handling, and eliminating process breakpoints.

[0035] In this embodiment, the sorting component 2 includes a vibratory feeder 21 and a feed channel 22. The vibratory feeder 21 is equipped with a spirally ascending directional track for arranging screws. The feed end of the feed channel 22 is connected to the discharge end of the vibratory feeder 21, and the discharge end of the feed channel 22 extends to the supply component 3. The feed channel 22 is used to transport the arranged screws to the supply component 3. In existing fastening processing equipment, screw feeding often results in material shortages or machine stoppages at downstream tightening stations due to uneven manual material handling speed or incomplete posture screening. Interruptions in the material supply process directly drag down the overall efficiency of fastening processing. The vibratory feeder 21 can cause several scattered screws to climb and arrange along the spiral track through vibration, converting manual material handling into continuous output, reducing the risk of material supply interruption, and ensuring that there are always screws available. The spirally ascending directional track can screen and unify the posture and orientation of the screws during the climbing process, ensuring that each screw entering the feed channel 22 has a similar posture, avoiding machine stoppages due to incorrect posture during subsequent material handling or tightening, and reducing the time wasted due to abnormal interruptions. The feed channel 22 conveys the arranged screws from the outlet of the vibratory feeder 21 to the inlet of the supply component 3, forming a passage between the sorting component 2 and the supply component 3. Since the output rate of the vibratory feeder 21 is typically higher than the consumption rate of a single screw, a continuous queue of screws naturally exists within the feed channel 22. This acts as a buffer and storage mechanism when the downstream supply component 3 briefly pauses its feeding due to momentary delays, eliminating the need for the vibratory feeder 21 to stop vibrating. When the downstream resumes feeding, the pre-stored screws in the feed channel 22 can be replenished immediately without waiting for the vibratory feeder 21 to accelerate its output again. Thus, while ensuring the flowability of the arranged screws, the feed channel 22 further eliminates the feeding waiting gap caused by downstream cycle fluctuations, ensuring that the supply component 3 always has screws available, avoiding idle waiting, and further improving the low processing efficiency of existing temperature control switch processing equipment.

[0036] like Figure 4 As shown, the supply component 3 is used to receive the screws output by the sorting component 2 and output a single screw. That is, it can receive the arranged screw queue and separate them one by one, outputting only a single screw at a time. This ensures that the tightening component 4 has a single screw waiting for each time it picks up a material, eliminating the idle travel time while waiting for screws. The action is more compact, which improves the problem of low processing efficiency of existing temperature control switch processing equipment.

[0037] In this embodiment, the supply component 3 includes a distributor 31, a conveying pipe 32, and a limiting gripper 33. The distributor 31 is located on one side near the discharge end of the material channel 22, with its inlet facing the outlet of the material channel 22. The distributor 31 is used to push out the screws arranged in the material channel 22 one by one. The conveying pipe 32 is located on one side of the distributor 31 and is connected to the outlet of the distributor 31. The conveying pipe 32 is used to convey a single screw. The limiting gripper 33 is located at the discharge end of the conveying pipe 32 and is used to limit the position of a single screw. In existing equipment, after a single screw is delivered to the position to be picked up via the conveying pipe 32, the screw often has an inconsistent position due to the lack of a straightening and holding structure. When the tightening component 4 picks up the screw, it needs to spend extra time to correct the position or repeat the picking process, resulting in gaps in the action connection. The feeder 31 can separate and push out the screws arranged in the feed channel 22 one by one, so that only one screw is output at a time. This ensures that the tightening component 4 picks up only one screw each time, avoiding the jamming or even machine stoppage caused by multiple screws being output at the same time, and ensuring the continuity of operation. The conveying pipe 32 can quickly convey the single screw pushed out by the feeder 31 to the limit gripper 33, shortening the conveying time of the screw from the separation point to the position to be picked up, so that the single screw has reached the bottom of the conveying pipe 32 before the tightening component 4 is reset, reducing the waiting time of the tightening component 4.

[0038] It should be noted that the limiting gripper 33 is initially in a closed position, with its gripper fingers defining a gap or hole to accommodate a single screw head. When a single screw falls through the conveying pipe 32, the screw shank passes through this gap or hole, and the screw head abuts against the upper surface of the gripper fingers, thus suspending and aligning the screw in the ready-to-retrieve position. When the screw clamp 41 of the tightening assembly 4 moves directly above the limiting gripper 33 and is ready to pick up the screw, the limiting gripper 33 opens, and its fingers retract beyond the outer diameter range of the screw head, releasing the vertical support on the screw head. The screw then falls into the waiting screw clamp 41 below. The limiting gripper 33 can limit the position of a single screw at the outlet end of the conveying pipe 32, providing a single screw for the tightening assembly 4, eliminating material picking failure or alignment time caused by screw positioning deviation, improving the success rate of a single material picking action, and at the same time, the closing suspension and opening release action of the gripper realizes the screw from the conveying pipe 32 to the screw chuck 41 without additional drive, making the material picking connection more compact, and further improving the problem of low processing efficiency of existing temperature control switch processing equipment.

[0039] like Figure 5 As shown, the tightening component 4 is used to pick up the single screw output by the supply component 3 and tighten the single screw into the threaded hole of the workpiece, completing the actions of picking up, aligning and tightening. The tightening action is more standardized, reducing the time of a single tightening process and improving the problem of low processing efficiency of existing temperature control switch processing equipment.

[0040] In this embodiment, the tightening assembly 4 includes a screw clamp 41, an electric screwdriver 42, and a third cylinder 43. The screw clamp 41 has a through hole along the axial direction and is used to accommodate and hold a single screw. The bit of the electric screwdriver 42 is inserted into the through hole and rotates the screw. The third cylinder 43 drives the electric screwdriver 42 to move linearly in the vertical direction. It is difficult to simultaneously ensure the stability of the screw clamping within the screw clamp 41 and the smoothness of screw insertion. If the clamping is too tight, the insertion resistance is high and it is difficult to remove the screw; if the clamping is too loose, the screw may fall during transfer, causing the operation to be interrupted. The screw clamp 41 can accommodate and hold a single screw, keeping it stable during movement and preventing it from falling or tilting. This reduces downtime for rework due to screws falling out, ensuring a smooth and continuous fastening process. The electric screwdriver 42 rotates its bit to screw the screw into the threaded hole of the workpiece, ensuring the fastening process doesn't take too long while maintaining a controllable rotation speed. The third cylinder 43 drives the electric screwdriver 42 to perform a linear reciprocating motion in the vertical direction, achieving downward engagement and reciprocating motion after fastening. In terms of the proportion of time for non-tightening actions, since the through hole of the screw clamp 41 is arranged coaxially with the bit of the electric screwdriver 42, when the third cylinder 43 drives the electric screwdriver 42 to press down, the bit is directly inserted into the screw clamp 41 along the same through hole and contacts the head of the screw. The transition of the screw from being clamped by the screw clamp 41 to being engaged and rotated by the bit is seamlessly completed on the same spatial axis, without the need for lateral alignment. The transition between picking up the material and tightening the screw has almost no time loss, which further improves the problem of low processing efficiency of existing temperature control switch processing equipment.

[0041] In this embodiment, the inner wall of the screw clamp 41 is provided with a groove, and a limiting member is provided in the groove. The limiting member is used to restrict the free fall of the screw. The screw clamp 41 can be freely rotated around its own central axis. The groove on the inner wall of the screw clamp 41 can provide installation space for the limiting member. The limiting member can block a single screw in the non-locking state, preventing a single screw from falling freely from the screw clamp 41 and coming out of the screw clamp 41, reducing the situation of material picking failure and repeated material picking caused by a single screw falling in the middle.

[0042] When the screwdriver bit 42 presses down and pushes the screw downwards, the screw head exerts an outward squeezing force on the limiting member, causing the limiting member to passively retract into the groove, releasing its obstruction of the screw head. Once tightening is complete and the clamping jaws move upwards with the screwdriver bit 42, disengaging from the screw head, the limiting member automatically returns to its blocking position due to its own elasticity or reset structure. This cycle is entirely passively triggered by the mechanical changes in the locking action, requiring no additional cylinder or electromagnetic drive. While achieving the anti-drop function, it generates almost no additional resistance during the tightening and disengagement process. For an example, please refer to... Figure 6In this embodiment, the limiting component is a stop block equipped with a spring. The screw clamp 41 rotates synchronously with the screw and bit during the rotation of the electric screwdriver 42, eliminating circumferential sliding friction between the inner wall of the clamp and the screw head. This makes the screw insertion process smoother, reduces rotational resistance, and shortens the insertion time per cycle. The passive yielding of the limiting component and the free rotation of the clamp work together to ensure that the screw is reliably axially limited during the transfer phase to prevent it from falling out, and also moves downwards with the bit and is smoothly released during the insertion phase with almost no resistance. This simultaneously satisfies the usually mutually restrictive performance indicators of reliable material handling and smooth insertion, further improving the low processing efficiency of existing temperature control switch processing equipment caused by the lack of coordination between screw clamping and release.

[0043] For example, in another embodiment of this application, please refer to Figure 7 The limiting component is a ring-shaped magnet, the inner wall of which is flush with the inner end face of the screw clamp 41. In the non-locking state, the magnet attracts the head of a single screw through magnetic attraction, preventing the screw from falling freely out of the screw clamp 41 and reducing the occurrence of material picking failures and repeated picking due to a single screw falling midway. When the bit of the electric screwdriver 42 presses down and pushes the screw downward, the axial thrust applied by the bit overcomes the magnetic attraction of the magnet, causing the screw head to detach from the magnet and allowing the screw to descend smoothly. After tightening is completed and the clamp returns to its original position with the electric screwdriver 42, the magnet attracts and fixes the next screw when it enters the clamp. The screw clamp 41 can rotate synchronously with the screw and bit when the electric screwdriver 42 rotates to lock, eliminating circumferential sliding friction between the inner wall of the clamp and the screw head, making the screw insertion process smoother, reducing rotational resistance, and shortening the screwing time for a single locking operation. The magnetic adsorption-based limiting method eliminates the need for reciprocating motion of mechanical clamping components. The screw's fixation and release within the jaws are achieved entirely through the presence or absence of magnetic contact. This zero-time switching and zero mechanical wear ensure the screw receives reliable axial holding force during transfer to prevent it from falling out, and during screwing in, it only needs to overcome a preset magnetic force to disengage, eliminating the risk of mechanical jamming. This achieves a balance between the often mutually restrictive performance indicators of reliable material handling and smooth screw fastening, further improving the low processing efficiency of existing temperature control switch processing equipment caused by uncoordinated screw clamping and release.

[0044] Furthermore, when the next screw is blown to the limiting jaw 33, the head of the screw is attracted by the magnet of the clamping mouth, causing the newly arrived screw head to generate a downward preload within the limiting jaw 33. This makes the screw head fit more tightly against the fingers of the limiting jaw 33, eliminating the micro-vibration and posture deviation of the screw within the limiting jaw 33 caused by air pressure fluctuations or vibrations. This further improves the coaxiality during the next material handling and reduces the time loss due to material misalignment. During the sorting and conveying process, fine metal fragments or dust inevitably fall off the surface of the screws. While the magnet attracts the screws, the tiny iron filings that fall off are attracted by the magnet around the groove, preventing them from falling into the threaded hole of the workpiece and causing stripping or jamming. This reduces the frequency of alarms due to abnormal locking torque caused by foreign objects, and improves the stability of continuous equipment operation. In special circumstances, such as a sudden power outage or emergency shutdown, the cylinder and vacuum system will immediately depressurize and fail. The magnetic force of the magnet is a passive physical field and does not rely on electrical energy. When the equipment suddenly loses power or air supply, traditional pneumatic grippers will loosen, causing screws to fall out. However, a magnetic limiting component can hold the screw in the gripper. When restarting, the equipment does not need to perform the lengthy reset process of emptying the material pipe and refeeding, achieving a power-off self-holding function and greatly shortening the recovery time after an abnormal shutdown.

[0045] like Figure 1 As shown, it also includes a lever assembly 5, which is located on one side of the tightening assembly 4. It is used to drive the screw clamp 41 to make an arc movement in the horizontal direction so that the screw clamp 41 is opposite to the limiting jaw 33 or the electric screwdriver 42. The lever assembly 5 includes a fourth cylinder 51 and a lever shaft 52. The output end of the fourth cylinder 51 is hinged to the lever shaft 52. The lever shaft 52 rotates around the shaft through a rotating shaft. The lever assembly 5 can make the screw clamp 41 alternately opposite to the limiting jaw 33 or the electric screwdriver 42, realize the switching between the material picking position and the locking position, so that the clamp can be transferred to the electric screwdriver 42 without moving the whole machine after picking up the material, shortening the station changeover time and compressing the cycle. The horizontal arc motion of the screw clamp 41 driven by the lever assembly 5 and the vertical linear motion of the electric screwdriver 42 driven by the third cylinder 43 are spatially independent. When the electric screwdriver 42 is still in the final stage of its upward reset stroke, the lever assembly 5 can drive the clamp to swing towards the material pick-up position. The material pick-up action and the reset action partially overlap in time, further reducing the time spent on the cycle idle stroke. The fourth cylinder 51 provides the power source to drive the lever shaft 52 to swing. One end of the lever shaft 52 is hinged to the output end of the fourth cylinder 51, and the other end is linked to the screw clamp 41. It can convert the linear motion of the cylinder into the arc swing of the screw clamp 41. The rotating shaft serves as the rotation fulcrum of the lever shaft 52, allowing the lever shaft 52 to rotate around it, providing a stable swing center and ensuring that the end position of the screw clamp 41 swings is consistent, reducing the problem of long alignment time caused by positioning deviation.

[0046] In this embodiment, the workbench 6 is used to support the feeding component 1, the sorting component 2, the supply component 3, and the tightening component 4. The workbench 6 has a discharge port, which is located on one side of the feeding component 1. The workbench 6 can provide an installation support base for each component, ensuring that the relative positions of the four components with different functions of feeding, sorting, supplying, and tightening are fixed. The unified positioning reference of each component can reduce the deviation of action connection caused by assembly error, avoid repeated debugging or machine stoppage due to misalignment, and ensure the stability of continuous operation. Since the pushing direction of the first cylinder 12 forms a 90° angle with the pushing direction of the second cylinder 13, and the discharge port is located on one side of the loading assembly 1 and on the extension path of the pushing direction of the second cylinder 13, when the second cylinder 13 pushes the locked workpiece along the second direction, the workpiece continues to slide forward due to inertia after leaving the push plate. At the end of the sliding, it begins to tilt and fall into the discharge port. The horizontal sliding and vertical falling generate a combined motion, and the workpiece does not need to be completely pushed away from the edge of the worktable 6 to enter the discharge channel. Therefore, the total auxiliary time for workpiece switching is shorter than the two-stage time of pushing into place and then discharging separately. The discharge port located on one side of the loading assembly 1 allows the locked workpiece to fall without manual removal or additional handling devices. The time for workpiece outflow is close to zero, thereby eliminating the efficiency breakpoint at the end of the process.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic screw-driving device for a pressure-type thermostat switch box, characterized in that, include: The feeding assembly (1) is used to transport the workpiece to be locked; Sorting component (2) is used to arrange and output screws; The supply component (3) is used to receive the screws output by the sorting component (2) and output a single screw; Tightening assembly (4) is used to obtain a single screw output by the supply assembly (3) and fasten the single screw into the threaded hole of the workpiece.

2. The automatic screw-driving device for the pressure-type thermostat switch box according to claim 1, characterized in that: The feeding assembly (1) includes a conveyor belt (11), a first cylinder (12) and a second cylinder (13). The conveyor belt (11) is used to transport the workpiece to be fastened. The first cylinder (12) is located on one side near the discharge end of the conveyor belt (11). The first cylinder (12) is used to push the workpiece to be fastened into the working range of the tightening assembly (4) for fastening. The second cylinder (13) is located on one side of the conveyor belt (11) and is used to push the fastened workpiece out of the working range of the tightening assembly (4).

3. The automatic screw-driving device for the pressure-type thermostat switch box according to claim 2, characterized in that: The sorting component (2) includes a vibratory feeder (21) and a feed channel (22). The vibratory feeder (21) is provided with a spirally ascending directional track for arranging screws. The feed end of the feed channel (22) is connected to the discharge end of the vibratory feeder (21). The discharge end of the feed channel (22) extends to the supply component (3). The feed channel (22) is used to transport the arranged screws to the supply component (3).

4. The automatic screw-driving device for the pressure-type thermostat switch box according to claim 3, characterized in that: The supply component (3) includes a distributor (31), a conveying pipe (32), and a limiting gripper (33). The distributor (31) is located on one side near the discharge end of the material channel (22). The inlet of the distributor (31) is opposite to the outlet of the material channel (22). The distributor (31) is used to push out the screws arranged in the material channel (22) one by one. The conveying pipe (32) is located on one side of the distributor (31). The conveying pipe (32) is connected to the outlet of the distributor (31). The conveying pipe (32) is used to convey a single screw. The limiting gripper (33) is located at the discharge end of the conveying pipe (32). The limiting gripper (33) is used to limit the position of a single screw.

5. The automatic screw-driving device for the pressure-type thermostat switch box according to claim 4, characterized in that: The tightening assembly (4) includes a screw chuck (41), an electric screwdriver (42), and a third cylinder (43). The screw chuck (41) has a through hole along the axial direction and is used to accommodate and hold a single screw. The bit of the electric screwdriver (42) is used to insert into the through hole and rotate the screw. The third cylinder (43) is used to drive the electric screwdriver (42) to move linearly in the vertical direction.

6. The automatic screw-driving device for the pressure-type thermostat switch box according to claim 5, characterized in that: The inner wall of the screw clamp (41) is provided with a groove, and a limiting member is provided in the groove to restrict the free fall of the screw.

7. The automatic screw-driving device for the pressure-type thermostat switch box according to claim 5, characterized in that: The screw clamp (41) is designed to rotate freely around its own central axis.

8. The automatic screw-driving device for the pressure-type thermostat switch box according to claim 6, characterized in that: It also includes a lever assembly (5), which is disposed on one side of the tightening assembly (4) to drive the screw chuck (41) to make an arc movement in the horizontal direction so that the screw chuck (41) is opposite to the limiting jaw (33) or the electric screwdriver (42).

9. The automatic screw-driving device for the pressure-type thermostat switch box according to claim 8, characterized in that: The lever assembly (5) includes a fourth cylinder (51) and a lever shaft (52). The output end of the fourth cylinder (51) is hinged to the lever shaft (52), and the lever shaft (52) rotates around the shaft via a rotating axis.

10. The automatic screw-driving device for the pressure-type thermostat switch box according to claim 1, characterized in that: It also includes a workbench (6), which is used to support the feeding assembly (1), the sorting assembly (2), the supply assembly (3) and the tightening assembly (4). The workbench (6) has a discharge port, which is located on one side of the feeding assembly (1).

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