Automatic lead screw penetrating device

Abstract

The invention provides an automatic lead screw penetrating device which comprises a workbench, a carrying mechanism, a detection mechanism and a lead screw penetrating mechanism, the carrying mechanism, the detection mechanism and the lead screw penetrating mechanism are arranged on the workbench, the carrying mechanism comprises two parallel carrying guide rails and a carrying rack located above the carrying guide rails, the bottom of the carrying mechanism is connected to the carrying guide rails through first sliding blocks, and a linear module is located between the carrying guide rails; one end of the first lead screw supporting mechanism is connected with the servo motor, the servo motor drives the carrying rack to move on the carrying guide rail through the linear module, and the first lead screw supporting mechanism and the second lead screw supporting mechanism are arranged on the carrying rack side by side in the direction of the carrying guide rail and respectively support a lead screw; the detection mechanism is arranged on the workbench, the upper end of the detection mechanism extends to the position above the carrying mechanism, and the detection mechanism is used for detecting whether the lead screw on the carrying mechanism is qualified. And the lead screw penetrating mechanism is arranged on the workbench and used for penetrating the lead screw on the sliding rail. The lead screw carrying and supporting structure is simplified, and the cost is reduced; and two groups of supporting mechanisms with different speeds are arranged, so that alternate feeding can be realized, and the efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of automated production equipment technology, and in particular to an automatic threading device. Background Technology

[0002] The fore-and-aft adjustment of a car seat is achieved through a sliding rail structure located at the bottom of the seat. The sliding rail structure mainly consists of a sliding rail and a lead screw. The rotation of the lead screw drives the seat to move on the sliding rail.

[0003] Existing slide rail lead screw assembly equipment, such as the invention patent with authorization publication number CN 221110619 U, discloses a fully automatic lead screw threading device for automotive electric slide rails. This device is used to directly thread the lead screw into the gearbox of the automotive electric slide rail, and its structure is complex, making it unsuitable for assembling individual slide rails and lead screws. Therefore, it is necessary to improve existing lead screw threading equipment to solve the aforementioned problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to overcome the shortcomings of the prior art, the present invention provides an automatic threading device.

[0005] The technical solution adopted by this invention to solve its technical problem is: an automatic threading device, comprising a worktable, a conveying mechanism, a detection mechanism, and a threading mechanism. The workbench, located at the bottom of the device, serves as overall support and mainly consists of a platform and a frame. A conveying mechanism, located on the upper surface of the worktable, is used to convey the lead screw. It includes a conveying guide rail, a first slider, a conveying frame, a servo motor, a linear module, a first lead screw support mechanism, and a second lead screw support mechanism. Two conveying guide rails are arranged parallel to each other on the worktable. The linear module is positioned between the two conveying guide rails, with one end connected to the servo motor. The servo motor is fixed to the worktable. The conveying frame is positioned above the conveying guide rails, and its bottom is slidably connected to the left and right conveying guide rails via multiple first sliders. The center of the bottom surface of the conveying frame is connected to the slider of the linear module. The servo motor drives the conveying frame to move on the conveying guide rails via the linear module. The first and second lead screw support mechanisms are arranged side-by-side above the conveying frame along the extension direction of the conveying guide rails. The first lead screw support mechanism supports one lead screw, and the second lead screw support mechanism supports the other lead screw. The testing mechanism is set on a workbench on one side of the handling mechanism, with its upper end extending above the handling mechanism. It is used to test whether the lead screw on the handling mechanism is qualified. The lead screw threading mechanism is located on the worktable at the rear end of the conveying mechanism and is used to thread the lead screw onto the slide rail.

[0006] Furthermore, the first lead screw support mechanism includes a guide rail cylinder, a second slider, a carrier plate, a carrier plate bracket, a first positioning fixture, and at least one support seat. The number of support seats can be set according to the length of the lead screw. The guide rail cylinder is fixed on the transport platform, and the carrier plate is positioned above the guide rail cylinder. The bottom front end of the carrier plate is slidably connected to the guide rail outside the guide rail cylinder via the second slider, which is connected to the push rod execution end of the guide rail cylinder. The rear end of the carrier plate is fixedly connected to the carrier plate bracket, which is a gantry frame. The bottom sides of the carrier plate bracket are respectively connected to the transport guide rails on the left and right sides via the first slider. The first positioning fixture is fixed to the front end of the carrier plate and has a positioning groove that is adapted to the nut of at least one type of lead screw. The support seat is positioned on the carrier plate behind the first positioning fixture along the direction of movement and has a U-shaped positioning groove. In use, the lead screw is placed above the first lead screw support mechanism, and the nut of the lead screw is embedded in the positioning groove of the first positioning fixture, and the rod of the lead screw is embedded in the U-shaped positioning groove of the support seat.

[0007] As the transport platform moves on the guide rail, the guide rail cylinder actuates, driving the carrier plate to move along the guide rail cylinder via the second slider. The carrier plate support moves synchronously on the transport guide rail via the first slider. Through the movement of the upper and lower stages, the first lead screw support mechanism and the second lead screw support mechanism generate different speeds, thereby causing the two sets of mechanisms to alternate and thus improve the transport efficiency.

[0008] Furthermore, the first lead screw support mechanism also includes cylinder bracket one and cylinder bracket two. The front end of the guide rail cylinder is fixed to the carrier plate bracket through cylinder bracket one, and the rear end of the guide rail cylinder is fixed to the carrier plate bracket through cylinder bracket two. Cylinder bracket one and cylinder bracket two suspend the guide rail cylinder on the carrier plate bracket.

[0009] Furthermore, to ensure the accurate stroke of the guide rail cylinder, the first lead screw support mechanism also includes a cylinder limiting assembly. This assembly includes a first limiting post and a second limiting post. The first limiting post is fixed to a first cylinder bracket, and the second limiting post is fixed to a second cylinder bracket, with the two posts facing each other. One side of the second slider is located between the first and second limiting posts, and the front and rear faces of the second slider are respectively opposite to the ends of the first and second limiting posts. The front face of the second slider can collide with the first limiting post, and the rear face of the second slider can collide with the second limiting post. Through the cooperation of the limiting posts and the second slider, the stroke of the guide rail cylinder can be limited. By adjusting the distance between the first and second limiting posts, the stroke of the guide rail cylinder can also be adjusted.

[0010] Furthermore, the second lead screw support mechanism includes a second positioning fixture, a support column, and at least one support seat. The number of support seats can be set according to the length of the lead screw. The second positioning fixture is arranged side by side on one side of the first positioning fixture, and the bottom surface of the second positioning fixture is directly fixed to the transport platform through the support column. The second positioning fixture is provided with a positioning groove that is adapted to the nut of at least one specification of lead screw. The support seat is arranged on the transport platform behind the second positioning fixture along the direction of movement, and the support seat is provided with a U-shaped positioning groove. In use, the lead screw is placed above the second lead screw support mechanism, and the nut of the lead screw is embedded in the positioning groove of the second positioning fixture, and the rod of the lead screw is embedded in the U-shaped positioning groove of the support seat.

[0011] The second lead screw support mechanism can only be driven by a servo motor to move the linear module, and has only one stage of motion, which can create a speed difference with the two stages of motion of the first lead screw support mechanism.

[0012] Furthermore, the detection mechanism includes a detection bracket, a detection cylinder, an adapter plate, a detection support base, a first detection sensor, a first sensor mounting plate, a second detection sensor, and a second sensor mounting plate. The bottom of the detection bracket is fixed to the workbench surface and located on the side of the transport mechanism. The detection cylinder is fixed to the upper end of the detection bracket facing the transport mechanism. The push rod of the detection cylinder is connected to one side of the detection support base via the adapter plate, and the detection cylinder can drive the detection support base to move up and down via the adapter plate. The other end of the detection support base extends forward to the top of the transport mechanism, and the first detection sensor and the second detection sensor are arranged in parallel on the detection support base. The first detection sensor is fixed to the detection support base via the first sensor mounting plate, and the second detection sensor is fixed to the detection support base via the second sensor mounting plate. The detection end of the lower part of the first detection sensor is directly opposite the lead screw position on the first lead screw support mechanism, and the detection end of the lower part of the second detection sensor is directly opposite the lead screw position on the second lead screw support mechanism.

[0013] Furthermore, the lead screw threading mechanism includes a first manipulator, a second manipulator, a first pneumatic gripper, and a second pneumatic gripper. The first manipulator and the second manipulator are both mounted on a workbench on one side of the rear end of the conveying mechanism. The first pneumatic gripper is mounted on the execution end of the first manipulator and is used to grip the slide rail. The second pneumatic gripper is mounted on the execution end of the second manipulator and is used to grip the lead screw.

[0014] Furthermore, the first and second pneumatic grippers have the same structure, including a gripper cylinder and gripper heads. The gripper heads are a pair mounted on the actuating end of the gripper cylinder. The gripper heads are arranged opposite each other and can move closer or further apart by the gripper cylinder. A first clamping position and a second clamping position are provided on the opposite side of the gripper heads. The first clamping position is used to clamp the lead screw and includes arc-shaped concave surfaces arranged opposite each other on the inner sides of the left and right gripper heads. The radius of the arc-shaped concave surfaces is adapted to the outer diameter of the lead screw to be clamped. The second clamping position is used to clamp the slide rail and includes clamping planes arranged on the inner sides of the left and right gripper heads. The clamping planes are located below the arc-shaped concave surfaces, and the distance between the clamping planes is greater than the opening distance between the arc-shaped concave surfaces.

[0015] The beneficial effects of the present invention are as follows: The present invention provides an automatic threading device for lead screws, (1) compared with the existing threading equipment, the present invention simplifies the handling and support structure of the lead screw and reduces the cost; (2) two sets of support mechanisms are set up, wherein the first lead screw support mechanism adopts two-stage drive and the second lead screw support mechanism adopts single-stage drive, so that the two sets of support mechanisms can generate a speed difference, thereby realizing alternating feeding and improving efficiency; (3) an inspection mechanism is added to inspect the quality of the lead screw, thereby screening out unqualified products and avoiding them from flowing to subsequent processes and affecting the overall product quality; (4) the grippers used to clamp the lead screw and the slide rail adopt the same structure of grippers, reducing the design of different parts, and at the same time, two robotic arms can alternately clamp the lead screw and the slide rail, and alternately clamp different products, so that the corresponding clamping cavity can be adjusted and the service life can be extended. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the automatic threading device of the present invention.

[0018] Figure 2 This is a structural diagram of the handling mechanism and the testing mechanism (the handling mechanism is located at the front end of the guide rail).

[0019] Figure 3 yes Figure 2 A schematic diagram of the structure in which the conveying mechanism moves the lead screw to the area below the testing mechanism.

[0020] Figure 4 yes Figure 3 An enlarged structural diagram of the testing facility.

[0021] Figure 5 yes Figure 2 A partial structural diagram of the conveying mechanism.

[0022] Figure 6This is a structural diagram of the testing organization.

[0023] Figure 7 A three-dimensional structural diagram of the first pneumatic gripper and the second pneumatic gripper.

[0024] Figure 8 This is a schematic diagram of the structure of the first pneumatic gripper / second pneumatic gripper (clamping state).

[0025] Figure 9 This is a schematic diagram of the structure of the first pneumatic gripper / second pneumatic gripper (open state).

[0026] In the diagram: 1. Workbench; 2. Transport mechanism; 21. Transport guide rail; 22. First slider; 23. Transport frame; 24. Servo motor; 25. Linear module; 26. First lead screw support mechanism; 261. Guide rail cylinder; 262. Second slider; 263. Carrier plate; 264a. Cylinder bracket one; 264b. Cylinder bracket two; 265. First positioning fixture; 266. First support seat; 267. Second support seat; 268. Carrier plate bracket; 269a. Limiting post one; 269b. Limiting post two. 27. Second lead screw support mechanism; 271. Second positioning fixture; 272. Support column; 273. Third support seat; 274. Fourth support seat; 3. Detection mechanism; 31. Detection bracket; 32. Detection cylinder; 33. Adapter plate; 34. Detection support seat; 35. First detection sensor; 36. First sensor mounting plate; 37. Second detection sensor; 38. Second sensor mounting plate; 4. Lead screw threading mechanism; 41. First manipulator; 42. Second manipulator; 43. First pneumatic gripper; 44. Second pneumatic gripper; 45. Gripper cylinder; 46. Gripper head; 47. First clamping position; 471. Arc-shaped concave surface; 48. Second clamping position; 481. Clamping plane; 49. Gripper adapter plate; 5. Slide rail; 6. Lead screw. Detailed Implementation

[0027] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0030] like Figures 1-3As shown, an automatic lead screw threading device of the present invention includes a worktable 1, a conveying mechanism 2, a detection mechanism 3, and a lead screw threading mechanism 4. The worktable 1 is located at the lower part of the device and is used for overall support. It is mainly composed of a table plate and a frame. The conveying mechanism 2 is located on the upper surface of the worktable 1 and is used to convey the lead screw 6. It includes a conveying guide rail 21, a first slider 22, a conveying frame 23, a servo motor 24, a linear module 25, a first lead screw support mechanism 26, and a second lead screw support mechanism 27. There are two conveying guide rails 21, which are arranged parallel to each other on the worktable 1. The linear module 25 is located between the two conveying guide rails 21 and one end is connected to the servo motor 24 for transmission. The servo motor 24 is fixed on the worktable 1. The conveying frame 23 is located above the conveying guide rails 21 and its bottom is slidably connected to the left and right conveying guide rails respectively by multiple first sliders 22. On 21, the middle part of the bottom surface of the transport platform 23 is connected to the slider of the linear module 25. The servo motor 24 can drive the transport platform 23 to move on the transport guide rail 21 through the linear module 25. The first lead screw support mechanism 26 and the second lead screw support mechanism 27 are arranged side by side above the transport platform 23 along the extension direction of the transport guide rail 21. The first lead screw support mechanism 26 is used to support one lead screw, and the second lead screw support mechanism 27 is used to support the other lead screw. The detection mechanism 3 is set on the workbench 1 on one side of the transport mechanism 2, and its upper end extends to the top of the transport mechanism 2. It is used to detect whether the lead screw on the transport mechanism 2 is qualified. The lead screw threading mechanism 4 is set on the workbench 1 at the rear end of the transport mechanism 2. It is used to thread the lead screw 6 onto the slide rail 5.

[0031] like Figure 4 and 5As shown, the first lead screw support mechanism 26 includes a guide rail cylinder 261, a second slider 262, a carrier plate 263, a carrier plate bracket 268, a first positioning fixture 265, and at least one support seat. The number of support seats can be set according to the length of the lead screw 6. In this embodiment, two support seats are preferred, namely a first support seat 266 and a second support seat 267, which are spaced apart on the carrier plate 263 along the direction of movement. The guide rail cylinder 261 is fixed on the transport table 23, and the carrier plate 263 is set on the guide rail cylinder 261. Above the guide cylinder 261; the front end of the carrier plate 263 is slidably connected to the guide rail outside the guide cylinder 261 via the second slider 262, and the second slider 262 is connected to the push rod execution end of the guide cylinder 261; the rear end of the carrier plate 263 is fixedly connected to the carrier plate bracket 268, which is a gantry frame, and the bottom of both sides of the carrier plate bracket 268 is respectively connected to the transport guide rails 21 on the left and right sides via the first slider 22; the first positioning fixture 265 is fixed to the front end of the carrier plate 263, and the first positioning fixture 265 is provided with a positioning groove that is adapted to the nut of at least one specification of lead screw 6; the support seat is set on the carrier plate 263 behind the first positioning fixture 265 along the movement direction, and the support seat is provided with a U-shaped positioning groove. In use, the lead screw 6 is placed above the first lead screw support mechanism 26, and the nut of the lead screw 6 is embedded in the positioning groove of the first positioning fixture 265, and the rod of the lead screw 6 is embedded in the U-shaped positioning groove of the support seat. The first lead screw support mechanism 26 further includes a cylinder bracket 264a and a cylinder bracket 264b. The front end of the guide rail cylinder 261 is fixed to the carrier plate bracket 268 through the cylinder bracket 264a, and the rear end of the guide rail cylinder 261 is fixed to the carrier plate bracket 268 through the cylinder bracket. The cylinder bracket 264a and the cylinder bracket 264b suspend the guide rail cylinder 261 on the carrier plate bracket 268. The first lead screw support mechanism 26 further includes a cylinder limiting assembly, which includes a first limiting post 269a and a second limiting post 269b. The first limiting post 269a is fixed on a first cylinder bracket 264a, and the second limiting post 269b is fixed on a second cylinder bracket 264b. The first limiting post 269a and the second limiting post 269b are arranged opposite to each other. One side of the second slider 262 is located between the first limiting post 269a and the second limiting post 269b. The front end face and the rear end face of the second slider 262 are respectively opposite to the ends of the first limiting post 269a and the second limiting post 269b. The front end face of the second slider 262 can collide with the first limiting post 269a, and the rear end face of the second slider 262 can collide with the second limiting post 269b. By cooperating with the limiting post and the second slider 262, the stroke of the guide rail cylinder 261 can be limited. By adjusting the distance between the first limiting post 269a and the second limiting post 269b, the stroke of the guide rail cylinder 261 can also be adjusted.

[0032] like Figure 4 and5 As shown, the second lead screw support mechanism 27 includes a second positioning fixture 271, a support column 272, and at least one support seat. The number of support seats can be set according to the length of the lead screw 6. In this embodiment, two support seats are preferred, namely a third support seat 273 and a fourth support seat 274. The third support seat 273 and the fourth support seat 274 are sequentially arranged on the transport platform 23 behind the second positioning fixture 271 along the movement direction. The second positioning fixture 271 is arranged side by side on one side of the first positioning fixture 265, and The bottom surface of the second positioning fixture 271 is directly fixed to the transport platform 23 via a support column 272. The second positioning fixture 271 is provided with a positioning groove that is adapted to the nut of at least one specification of lead screw 6. The support base is set on the transport platform 23 behind the second positioning fixture 271 along the direction of movement, and the support base is provided with a U-shaped positioning groove. In use, the lead screw 6 is placed above the second lead screw support mechanism 27, and the nut of the lead screw 6 is embedded in the positioning groove of the second positioning fixture 271, and the rod of the lead screw 6 is embedded in the U-shaped positioning groove of the support base. The second lead screw support mechanism 27 can only drive the linear module 25 to move through the servo motor 24, and has only one stage of movement, which can produce a speed difference with the two stages of movement of the first lead screw support mechanism 26.

[0033] In this embodiment, the first positioning fixture 265 and the second positioning fixture 271 adopt the same structure. Each positioning fixture is provided with two positioning slots for embedding the lead screw 6 nut, which can realize the positioning of at least two different sizes of lead screw 6 nuts. Multiple support seats are used to meet the support of lead screws 6 of different lengths, improve compatibility, and broaden the scope of application.

[0034] like Figure 4 and 6As shown, the detection mechanism 3 includes a detection bracket 31, a detection cylinder 32, an adapter plate 33, a detection support base 34, a first detection sensor 35, a first sensor mounting plate 36, a second detection sensor 37, and a second sensor mounting plate 38. The bottom of the detection bracket is fixed to the table surface of the workbench 1 and is located on the side of the transport mechanism 2. The detection cylinder 32 is fixed to the upper end of the detection bracket 31 facing the transport mechanism 2. The push rod of the detection cylinder 32 is connected to one side of the detection support base 34 through the adapter plate 33, and the detection cylinder 32 can drive the detection support base 34 up and down through the adapter plate 33. The detection support 34 extends forward to the top of the conveying mechanism 2 at the other end. A first detection sensor 35 and a second detection sensor 37 are arranged in parallel on the detection support 34. The first detection sensor 35 is fixed to the detection support 34 by a first sensor mounting plate 36, and the second detection sensor 37 is fixed to the detection support 34 by a second sensor mounting plate 38. The detection end of the lower part of the first detection sensor 35 is directly opposite the position of the lead screw 6 on the first lead screw support mechanism 26, and the detection end of the lower part of the second detection sensor 37 is directly opposite the position of the lead screw 6 on the second lead screw support mechanism 27.

[0035] The detection cylinder 32 moves up and down, and moves synchronously through the adapter plate 33 and the detection support 34, which can adjust the height of the detection ends of the first detection sensor 35 and the second detection sensor 37, thereby adjusting the detection distance to ensure the accuracy of the detection.

[0036] like Figure 1 , Figures 7-9As shown, the lead screw threading mechanism 4 includes a first robotic arm 41, a second robotic arm 42, a first pneumatic gripper 43, and a second pneumatic gripper 44. The first robotic arm 41 and the second robotic arm 42 are both mounted on the workbench 1 on one side of the rear end of the conveying mechanism 2. The first pneumatic gripper 43 is mounted on the execution end of the first robotic arm 41 and is used to grip the slide rail 5. The second pneumatic gripper 44 is mounted on the execution end of the second robotic arm 42 and is used to grip the lead screw 6. The first pneumatic gripper 43 and the second pneumatic gripper 44 have the same structure, including a gripper cylinder 45 and gripper heads 46. The gripper heads 46 are a pair mounted on the actuating end of the gripper cylinder 45. The gripper heads 46 are arranged opposite each other and can move closer or further apart by being driven by the gripper cylinder 45. The opposite side of the gripper heads 46 is provided with a first clamping position 47 and a second clamping position 48. The first clamping position 47 is used to clamp the lead screw 6 and includes arc-shaped concave surfaces 471 arranged opposite each other on the inner sides of the left and right gripper heads 46. The radius of the arc-shaped concave surfaces 471 is adapted to the outer diameter of the lead screw 6 to be clamped. The second clamping position 48 is used to clamp the slide rail 5 and includes clamping planes 481 arranged on the inner sides of the left and right gripper heads 46. The clamping planes 481 are located below the arc-shaped concave surfaces 471, and the distance between the clamping planes 481 is greater than the opening distance between the arc-shaped concave surfaces 471. The gripper cylinder 45 is connected to the execution end of the first robot 41 / second robot 42 via a gripper adapter plate 49. Preferably, the first robot 41 and the second robot 42 are robot arms with the same structure.

[0037] Working principle: The servo motor 24 drives the transport table 23 to move through the linear module 25. When the transport table 23 moves on the transport guide rail 21, the first lead screw support mechanism 26 and the second lead screw support mechanism 27 on the transport table 23 will move synchronously, thereby driving the lead screw 6 on them to move simultaneously toward the lead screw threading mechanism 4 at the rear end of the worktable 1, so that the lead screw 6 on the two sets of support mechanisms obtains the same first movement speed.

[0038] Simultaneously, the guide rail cylinder 261 actuates, driving the carrier plate 263 to move along the guide rail cylinder 261 via the second slider 262. The carrier plate bracket 268 moves synchronously on the transport guide rail 21 via the first slider 22, causing the lead screw 6 on the first lead screw support mechanism 26 to obtain a second movement speed. At this time, the first lead screw support mechanism 26 moves through two stages of movement, while the second lead screw support mechanism 27 only moves through the lower stage. Therefore, the first lead screw support mechanism 26 and the second lead screw support mechanism 27 generate different speeds, thereby causing the two sets of mechanisms to alternate and stagger to improve transport efficiency.

[0039] The first lead screw support mechanism 26 and the second lead screw support mechanism 27 drive the lead screw 6 to move. When the lead screw 6 passes the first detection sensor 35 and the second detection sensor 37 respectively, the distance between the lead screw 6 and the sensor is detected to determine whether the quality of the lead screw 6 is qualified. When a non-qualified lead screw 6 is detected, an alarm is triggered and the lead screw 6 is directly rejected. Qualified lead screw 6 enters the next process.

[0040] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of the present invention. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An automatic threading device, characterized in that: Includes a workbench, a transport mechanism, a testing mechanism, and a lead screw threading mechanism. The workbench, located at the bottom of the device, serves as overall support; A conveying mechanism, located on the upper surface of the worktable, is used to convey the lead screw. It includes a conveying guide rail, a first slider, a conveying frame, a servo motor, a linear module, a first lead screw support mechanism, and a second lead screw support mechanism. Two conveying guide rails are arranged parallel to each other on the worktable. The linear module is positioned between the two conveying guide rails, with one end connected to the servo motor. The servo motor is fixed to the worktable. The conveying frame is positioned above the conveying guide rails, and its bottom is slidably connected to the left and right conveying guide rails via multiple first sliders. The center of the bottom surface of the conveying frame is connected to the slider of the linear module. The servo motor drives the conveying frame to move on the conveying guide rails via the linear module. The first and second lead screw support mechanisms are arranged side-by-side above the conveying frame along the extension direction of the conveying guide rails. The first lead screw support mechanism supports one lead screw, and the second lead screw support mechanism supports the other lead screw. The testing mechanism is set on a workbench on one side of the handling mechanism, with its upper end extending above the handling mechanism. It is used to test whether the lead screw on the handling mechanism is qualified. The lead screw threading mechanism is located on the worktable at the rear end of the conveying mechanism and is used to thread the lead screw onto the slide rail.

2. The automatic threading device as described in claim 1, characterized in that: The first lead screw support mechanism includes a guide rail cylinder, a second slider, a carrier plate, a carrier plate bracket, a first positioning fixture, and at least one support seat. The guide rail cylinder is fixed to a transport platform, and the carrier plate is positioned above the guide rail cylinder. The bottom front end of the carrier plate is slidably connected to a guide rail outside the guide rail cylinder via a second slider, which is connected to the push rod execution end of the guide rail cylinder. The rear end of the carrier plate is fixedly connected to the carrier plate bracket, which is a gantry frame. The bottom sides of the carrier plate bracket are respectively connected to the transport guide rails on the left and right sides via first sliders. The first positioning fixture is fixed to the front end of the carrier plate and has a positioning groove adapted to at least one type of lead screw nut. The support seat is positioned on the carrier plate behind the first positioning fixture along the direction of movement and has a U-shaped positioning groove. In use, the lead screw is placed above the first lead screw support mechanism, and the nut of the lead screw is embedded in the positioning groove of the first positioning fixture, while the rod of the lead screw is embedded in the U-shaped positioning groove of the support seat.

3. The automatic threading device as described in claim 2, characterized in that: The first lead screw support mechanism also includes cylinder bracket one and cylinder bracket two. The front end of the guide rail cylinder is fixed to the carrier plate bracket through cylinder bracket one, and the rear end of the guide rail cylinder is fixed to the carrier plate bracket through cylinder bracket two. Cylinder bracket one and cylinder bracket two suspend the guide rail cylinder on the carrier plate bracket.

4. The automatic threading device as described in claim 3, characterized in that: The first lead screw support mechanism further includes a cylinder limiting assembly, which includes a limiting post one and a limiting post two. The limiting post one is fixed on a cylinder bracket one, and the limiting post two is fixed on a cylinder bracket two. The limiting post one and the limiting post two are arranged opposite to each other. One side of the second slider is located between the limiting post one and the limiting post two, and the front end face and the rear end face of the second slider are respectively opposite to the ends of the limiting post one and the limiting post two. The front end face of the second slider can collide with the limiting post one, and the rear end face of the second slider can collide with the limiting post two.

5. The automatic threading device as described in claim 2, characterized in that: The second lead screw support mechanism includes a second positioning fixture, a support column, and at least one support base. The second positioning fixture is arranged side by side on one side of the first positioning fixture, and the bottom surface of the second positioning fixture is directly fixed to the transport platform through the support column. The second positioning fixture is provided with a positioning groove that is adapted to the nut of at least one specification of lead screw. The support base is arranged on the transport platform behind the second positioning fixture along the direction of movement, and the support base is provided with a U-shaped positioning groove. In use, the lead screw is placed above the second lead screw support mechanism, and the nut of the lead screw is embedded in the positioning groove of the second positioning fixture, and the rod of the lead screw is embedded in the U-shaped positioning groove of the support base.

6. The automatic threading device as described in claim 1, characterized in that: The detection mechanism includes a detection bracket, a detection cylinder, an adapter plate, a detection support base, a first detection sensor, a first sensor mounting plate, a second detection sensor, and a second sensor mounting plate. The bottom of the detection bracket is fixed to the workbench surface and located on the side of the transport mechanism. The detection cylinder is fixed to the upper end of the detection bracket facing the transport mechanism. The push rod of the detection cylinder is connected to one side of the detection support base via the adapter plate, and the detection cylinder can drive the detection support base to move up and down via the adapter plate. The other end of the detection support base extends forward to the top of the transport mechanism, and the first detection sensor and the second detection sensor are arranged in parallel on the detection support base. The first detection sensor is fixed to the detection support base via the first sensor mounting plate, and the second detection sensor is fixed to the detection support base via the second sensor mounting plate. The detection end of the lower part of the first detection sensor is directly opposite the lead screw position on the first lead screw support mechanism, and the detection end of the lower part of the second detection sensor is directly opposite the lead screw position on the second lead screw support mechanism.

7. The automatic threading device as described in claim 1, characterized in that: The lead screw threading mechanism includes a first robotic arm, a second robotic arm, a first pneumatic gripper, and a second pneumatic gripper. The first robotic arm and the second robotic arm are both mounted on a workbench on one side of the rear end of the conveying mechanism. The first pneumatic gripper is mounted on the execution end of the first robotic arm and is used to grip the slide rail. The second pneumatic gripper is mounted on the execution end of the second robotic arm and is used to grip the lead screw.

8. The automatic threading device as described in claim 7, characterized in that: The first and second pneumatic grippers have the same structure, including a gripper cylinder and gripper heads. The gripper heads are a pair mounted on the actuating end of the gripper cylinder. The gripper heads are arranged opposite each other and can move closer or further apart by being driven by the gripper cylinder. A first clamping position and a second clamping position are provided on the opposite side of the gripper heads. The first clamping position is used to clamp the lead screw and includes arc-shaped concave surfaces arranged opposite each other on the inner sides of the left and right gripper heads. The radius of the arc-shaped concave surfaces is adapted to the outer diameter of the lead screw to be clamped. The second clamping position is used to clamp the slide rail and includes clamping planes arranged on the inner sides of the left and right gripper heads. The clamping planes are located below the arc-shaped concave surfaces, and the distance between the clamping planes is greater than the opening distance between the arc-shaped concave surfaces.

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