A screw socket

Abstract

This invention discloses a screw holder, including a support platform with a vertically downward-extending screw channel on the support platform. A support assembly and a correction assembly are located at the lower end of the screw channel. The support assembly is radially movable along the screw channel to support the screw's nut, and the correction assembly is used to align the centerline of the screw with the centerline of the screw channel. The advantages of this invention are: when the screw is delivered to the lower end of the screw channel, the support assembly supports the underside of the screw's nut, preventing the screw from falling; the correction assembly corrects the screw, keeping it always on the centerline of the screw channel, preventing screw misalignment, and preventing errors such as misaligned screw driving during subsequent screw driving.

Description

Technical Field

[0001] This invention relates to an automatic screw-driving mechanism, and more specifically to a screw receiving seat. Background Technology

[0002] An automatic screw-driving mechanism is a small machine that automates screw fastening. Its operating structure can generally be divided into two parts: a screw receiving mechanism and an electric screwdriver mechanism. The screw receiving mechanism is responsible for screening and providing screws, while the electric screwdriver mechanism is responsible for picking up and fastening the screws. The emergence of automatic screw-driving mechanisms saves labor costs and improves production and assembly efficiency.

[0003] In the existing technology, there are two methods for automatic screw-driving mechanisms to provide screws, as follows:

[0004] One type is the suction nozzle. The specific method is as follows: the suction nozzle picks up one screw at a time from the screw feeder. When the screw is taken out of the screw feeder, the screw may scrape, causing the screw to be misaligned. In addition, the inside of the suction nozzle is made according to the shape of the screw head, which requires relatively high consistency of screws. If the shape of the screw head is off, it will also cause the screw to be misaligned. This type of suction nozzle is usually more effective for flat head screws and less effective for round head screws because the suction nozzle's conforming surface is a curved surface, and the screw head is also a curved surface. The two curved surfaces cannot restrict the screw's degree of freedom, ultimately causing the screw to be misaligned. In addition, during the high-speed movement of the suction nozzle, the screw can easily break free from the vacuum suction force of the suction nozzle, causing the screw to fall off.

[0005] Another type is the clamp type. The specific method is as follows: a blow-type screw feeder is used to supply screws. The clamp is held in place by spring force. When screwing, the screw gun directly pushes the screw forward, and the screw pushes the clamp open. In this method, when the clamps on the left and right sides are pushed open, the force on the two clamps is unbalanced. It is possible that one clamp opens at a larger angle and the other clamp opens at a smaller angle, which will cause the screw to be crooked.

[0006] It is evident that both existing methods of providing screws have some defects, such as screw misalignment, screw falling out, and screw misalignment. These defects seriously affect the product assembly quality and may even cause the product to be scrapped. Summary of the Invention

[0007] In view of this, the present invention provides a screw holder, which aims to solve the technical problems of screw falling out, screw misalignment, and screw misalignment in traditional screw removal.

[0008] To achieve the above objectives, the technical solution of the present invention is as follows:

[0009] A screw holder, the key feature of which is: a support platform, wherein a screw channel extending vertically downward is provided on the support platform, and a support assembly and a correction assembly are provided at the lower end of the screw channel, wherein the support assembly is movable radially along the screw channel to support the screw nut, and the correction assembly is used to make the center line of the screw coincide with the center line of the screw channel.

[0010] With the above structure, when the screw is delivered to the lower end of the screw channel, the support assembly can support the lower side of the screw nut to prevent the screw from falling off, and the correction assembly can correct the screw to keep it on the center line of the screw channel, avoiding the screw from being crooked. At the same time, it can prevent the screw from being driven off-center in subsequent screw driving work.

[0011] Preferably, the correction assembly includes a finger cylinder and two sets of grippers that are driven to open and close by the finger cylinder, and the lower ends of the two sets of grippers have arc-shaped grooves adapted to the outer diameter of the screw.

[0012] Preferably, the two ends of the arc-shaped groove have guiding slopes.

[0013] Preferably, the support assembly includes two spring plates symmetrically arranged on both radial sides of the screw pipe, and the lower ends of the two spring plates are provided with stop posts extending into the screw pipe.

[0014] Preferably, each spring sheet has two sets of four sets of retaining posts at its lower end, and the ends of each retaining post are spherical.

[0015] Preferably, the screw pipe, support assembly, and correction assembly are all rotatably mounted on a support platform, and the support platform is provided with a rotating mechanism for driving the screw pipe, support assembly, and correction assembly to rotate as a whole.

[0016] Preferably, the rotating mechanism includes a servo motor fixed on a support platform, a drive gear fixed on the output shaft of the servo motor, and a driven gear meshing with the drive gear. A washer is fixedly connected to the lower side of the driven gear, and a rotating fixed seat is fixedly connected to the lower side of the washer. The screw pipe, support assembly, and correction assembly are all fixedly connected to the rotating fixed seat.

[0017] Preferably, the support platform is provided with a connecting seat above the driven gear. The connecting seat includes a connecting disc and a connecting shaft. The connecting disc is rotatably mounted on the support platform. The connecting shaft passes downward through the middle of the washer, and its lower end is fixedly connected to the rotating fixed seat. The upper part of the screw pipe passes upward through the rotating fixed seat and is embedded in the connecting shaft. The upper end of the spring plate is embedded in the rotating fixed seat.

[0018] Preferably, the connecting seat has a tool channel running through its height and a screw introduction channel extending obliquely upward from the side of the tool channel; the lower end of the tool channel is connected to the screw channel, and the center lines of the tool channel, the screw channel and the driven gear coincide.

[0019] Preferably, the system also includes a mounting base plate, wherein the support platform is slidably mounted on the mounting base plate in the height direction via a slide rail assembly, a limiting part is provided at the lower end of the mounting base plate, and a stress relief spring is provided between the support platform and the mounting base plate, which causes the support platform to abut against the limiting part downward.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The screw holder provided by this invention can support the lower side of the screw nut when the screw is delivered to the lower end of the screw channel, preventing the screw from falling off. The correction component can correct the screw so that it always stays on the center line of the screw channel, avoiding screw skew. At the same time, it can prevent the screw from being driven off-center in subsequent screw driving work. Attached Figure Description

[0022] Figure 1 This is a reference diagram showing the usage of screw holder B in automatic screw-driving mechanism A.

[0023] Figure 2 This is a side view of screw holder B;

[0024] Figure 3 A three-dimensional structural diagram showing the gear cover 1a hidden behind the screw socket B;

[0025] Figure 4 A three-dimensional structural diagram (bottom view) of screw socket B;

[0026] Figure 5 A three-dimensional structural diagram (bottom view) of screw socket B receiving screw e;

[0027] Figure 6 For along Figure 2 A cross-sectional view along the CC direction;

[0028] Figure 7 To show a cross-sectional view of the electric screwdriver bit 11 entering the screw conduit 2;

[0029] Figure 8 For along Figure 6 Sectional view along the DD direction;

[0030] Figure 9 This is a side view of the screw holder B applied to the automatic screw-driving mechanism A. Detailed Implementation

[0031] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0032] like Figure 2 and 8 As shown, a screw receiving seat B includes a support platform 1, on which a screw channel 2 extends vertically downward. A support assembly 3 and a correction assembly 4 are provided at the lower end of the screw channel 2. The support assembly 3 can move radially along the screw channel 2 to support the nut of the screw e, and the correction assembly 4 is used to make the center line of the screw e coincide with the center line of the screw channel 2.

[0033] refer to Figure 1 In practical applications, the screw receiving seat B is installed on the automatic screw-driving mechanism A, and its main function is to receive and correct the screw e that is being delivered. When the screw e is delivered to the lower end of the screw channel 2, the support assembly 3 can support the lower end of the screw e's nut to prevent the screw e from falling off, and the correction assembly 4 can correct the screw e, so that the screw e is always upright on the center line of the screw channel 2, avoiding the screw e from being crooked. In addition, when the subsequent electric screwdriver mechanism locks the screw e, with the assistance of the support assembly 3 and the correction assembly 4, it can prevent the screw e from being driven off-center, thus improving the accuracy of product assembly.

[0034] Furthermore, in combination Figure 2 and 4 It can be seen that the correction component 4 includes a finger cylinder 4b and two sets of grippers 4a. The finger cylinder 4b can drive the two sets of grippers 4a to open and close. The two sets of grippers 4a are symmetrically arranged on both sides of the screw channel 2 in the radial direction. The upper end of the grippers 4a is connected to the finger cylinder 4b, and the lower end of each gripper has an arc-shaped groove 4a1 adapted to the outer diameter of the screw e. (Further details omitted) Figure 5 When screw e is delivered to the lower end of screw pipe 2, the two sets of clamps 4a close. The arc grooves 4a1 at the lower end of the two sets of clamps 4a can just clamp screw e, so that the center line of screw e is always kept on the center line of screw pipe 2, thus avoiding the screw e from being skewed.

[0035] Furthermore, such as Figure 4 As shown, each set of arc-shaped grooves 4a1 has guide slopes b at both ends. When screw e is misaligned to a certain extent, the guide slopes b at both ends of the arc-shaped grooves 4a1 can guide screw e into the arc-shaped grooves 4a1, completing the correction of screw e. If the ends of the arc-shaped grooves 4a1 are straight, when screw e is misaligned, the end of the arc-shaped grooves 4a1 may easily push screw e out of the arc-shaped grooves 4a1, or the end of the arc-shaped grooves 4a1 may directly get stuck on the threads of screw e, causing screw e to be misaligned. In the subsequent screw-driving work, the screw e may also be misaligned, seriously affecting the assembly quality of the product.

[0036] Please refer to Figure 4 and8 The support assembly 3 includes two spring plates 3b symmetrically arranged on both radial sides of the screw conduit 2. Each spring plate 3b has a stop post 3a extending into the screw conduit 2 at its lower end. In this embodiment, there are two sets of stop posts 3a at the lower end of each spring plate 3b, and the four sets of stop posts 3a are arranged in a rectangular pattern. This design better supports the lower end of the screw nut, making the screw nut more stably supported on the four stop posts 3a. Furthermore, as... Figure 8 As shown, the ends of each stop post 3a are spherical structures 3a1. When the electric screwdriver mechanism starts to drive the screw e downward, it helps to guide each stop post 3a to move radially outward along the screw channel 2. During this process, the lower part of the spring plate 3b bends outward, so that the nut of the screw e can pass downward over the stop post 3a.

[0037] Revisit Figure 4 In this embodiment, the lower end of the screw pipe 2 is provided with a relief groove 2a corresponding to four sets of stop posts 3a. Each set of stop posts 3a passes through the corresponding relief groove 2a and extends into the interior of the screw pipe 2. In addition, two spring plates 3b and two sets of clamps 4a are distributed around the screw pipe 2 and do not interfere with each other.

[0038] Please refer to Figure 2 The support platform 1 is equipped with a rotating mechanism 5, which can drive the screw pipe 2, support assembly 3, and correction assembly 4 to rotate as a whole. When the electric screwdriver mechanism is tightening the screw, the finger cylinder 4b drives the two sets of grippers 4a to open. At this time, if there are obstacles around the screw holes of the product below, the grippers 4a may interfere when they open. Therefore, the rotating mechanism 5 needs to drive the screw pipe 2, support assembly 3, and correction assembly 4 to rotate as a whole at a certain angle until there are no obstacles in the direction in which the grippers 4a open. This avoids damage to the product or device caused by the grippers 4a being forcibly opened, and further improves the scope of use and lifespan of the device.

[0039] Combined Figure 3 and Figure 8 The rotating mechanism 5 includes a servo motor 5a fixed on the support platform 1, a drive gear 5b fixed on the output shaft a of the servo motor 5a, and a driven gear 5c meshing with the drive gear 5b. A washer 5d is fixedly connected to the lower side of the driven gear 5c, and a rotating fixed seat 5e is fixedly connected to the lower side of the washer 5d. The screw pipe 2, the support assembly 3, and the correction assembly 4 are all fixedly connected to the rotating fixed seat 5e. The working principle of the rotating mechanism 5 is as follows: the servo motor 5a drives the drive gear 5b to rotate, the drive gear 5b drives the driven gear 5c to rotate, thereby driving the rotating fixed seat 5e below to rotate. Using the servo motor 5a to drive the rotation has the advantages of small size and high torque, which can minimize the installation space of the device and simplify the mechanism design.

[0040] Furthermore, such as Figure 2As shown, the support platform 1 is provided with a gear cover 1a on the outside, which can cover the driving gear 5b and the driven gear 5c, protect the driving gear 5b and the driven gear 5c, and improve the aesthetics of the device.

[0041] Furthermore, such as Figure 6 As shown, a connecting seat 6 is provided on the support platform 1 above the driven gear 5c. The connecting seat 6 includes a connecting plate 6a and a connecting shaft 6b. The connecting plate 6a is rotatably mounted on the support platform 1 via a bearing f. The connecting shaft 6b passes downward through the middle of the washer 5d, and its lower end is fixedly connected to the rotating fixed seat 5e by a screw. The upper part of the screw tube 2 passes upward through the rotating fixed seat 5e and is embedded in the connecting shaft 6b. The upper end of each spring plate 3b is embedded in the rotating fixed seat 5e. Simultaneously, combined with... Figure 8 It can be seen that the finger cylinder 4b is fixedly connected to the rotating fixed seat 5e. With this design, when the servo motor 5a drives the drive gear 5b to rotate, the rotating fixed seat 5e can drive the screw pipe 2, the support assembly 3 and the correction assembly 4 to rotate.

[0042] Revisit Figure 6 The connecting seat 6 has a tool channel 6c extending through its height and a screw introduction channel 6d extending obliquely upward from the side of the tool channel 6c. The lower end of the tool channel 6c abuts against the screw channel 2. The center lines of the tool channel 6c, the screw channel 2, and the driven gear 5c coincide. (Further details omitted) Figure 9 As can be seen, a plastic hose 10 is connected to the upper end of the screw introduction channel 6d, and the other end of the plastic hose 10 is connected to the screw feeder. The screw feeder can transport the screw e through the plastic hose 10 to the screw channel 2.

[0043] The working process of the automatic screw-driving mechanism A is as follows: (Combined with...) Figure 6 and Figure 9The screw feeder delivers screws (e) to the plastic hose 10. Screws (e) enter the tool channel 6c through the screw introduction channel 6d and finally fall to the lower end of the screw pipe 2. At this time, the lower end of the screw (e) is supported by four sets of stop posts 3a. Simultaneously, the finger cylinder 4b drives the two sets of grippers 4a to close. The lower ends of the two sets of grippers 4a can just lock and correct the screw (e), so that the center line of the screw (e) is always kept on the center line of the screw pipe 2, avoiding the screw (e) from being skewed. Afterward, the automatic screw-driving mechanism A moves to above the product and positions the screw (e) directly above the screw hole of the product. The electric screwdriver mechanism drives the electric screwdriver bit 11 to enter the screw pipe 2 through the tool channel 6c, so that the lower end of the electric screwdriver bit 11 presses against the cross head of the screw (e) nut. Then, the finger cylinder 4b drives the two sets of grippers 4a to open. When the electric screwdriver mechanism drives the electric screwdriver bit 11 to drive the screw (e) downward, the nut of the screw (e) can open the two sets of spring plates 3b and pass downward over the stop posts 3a, thereby locking the screw (e) in the corresponding screw hole. During the conveying and tightening of screw e, screw e is always kept vertically on the center line of screw pipe 2, ensuring that screw e can be accurately locked in the corresponding screw hole, and also avoiding the problem of screw e falling off during movement.

[0044] Please refer to Figure 1 The automatic screw-driving mechanism A has a mounting base plate 7. A support platform 1 is slidably mounted on the mounting base plate 7 via a slide rail assembly 8. A limiting part 7a is located at the lower end of the mounting base plate 7. A relief spring 9 is provided between the support platform 1 and the mounting base plate 7, causing the support platform 1 to press downwards against the limiting part 7a. When the automatic screw-driving mechanism A is working, if the height of the product below it deviates significantly, the parts under the support platform 1 are prone to colliding with the product, causing damage to the device and rendering it unusable. Because of the relief spring 9 between the support platform 1 and the mounting base plate 7, when the device does not collide with the product, the support platform 1 presses downwards against the limiting part 7a. When the device collides with the product, under the action of the relief spring 9, the support platform 1 can retract upwards along the height direction of the mounting base plate 7, preventing direct collision between the device and the product. Then, the automatic screw-driving mechanism A is lifted upwards, and the relief spring 9 releases the downward force, causing the support platform 1 to return to the position where it abuts against the limiting part 7a. This design prevents collision damage to the device during downward movement.

[0045] Revisit Figure 1 and Figure 9The slide rail assembly 8 includes a guide rail 8a disposed in the height direction of the mounting base plate 7, and a slider 8b slidably mounted on the guide rail 8a. An adapter plate 8c is fixedly mounted on the outer end of the slider 8b, and the support platform 1 is fixedly connected to the adapter plate 8c. A positioning plate 8d perpendicular to the mounting base plate 7 is provided, located above the adapter plate 8c. A vertically extending guide post 8e is fixedly mounted on the upper end of the adapter plate 8c, and the upper end of the guide post 8e is slidably connected to the positioning plate 8d. A relief spring 9 is disposed on the guide post 8e, with its two ends abutting against the upper end of the adapter plate 8c and the lower end of the positioning plate 8d, respectively. With this design, when no collision occurs, the lower end of the slider 8b abuts against the limiting part 7a; when a collision occurs, the relief spring 9 causes the support platform 1 to retract upwards.

[0046] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention. Those skilled in the art, under the guidance of the present invention, can make various similar representations without departing from the spirit and claims of the present invention, and such modifications all fall within the protection scope of the present invention.

Claims

1. A screw socket, characterized by: The application relates to a screw supporting device, which comprises a supporting platform (1) provided with a vertically downward extending screw pipe (2), a supporting assembly (3) and a correcting assembly (4) arranged at the lower end of the screw pipe (2), wherein the supporting assembly (3) can move radially along the screw pipe (2) and is used for supporting the screw nut, and the correcting assembly (4) is used for aligning the center line of the screw with the center line of the screw pipe (2). The correcting assembly (4) comprises a finger air cylinder (4b) and two groups of clamping jaws (4a) driven to open and close by the finger air cylinder (4b), the two groups of clamping jaws (4a) are symmetrically arranged on the two sides of the screw pipe (2) in the radial direction, the lower end of each group of clamping jaws (4a) is provided with an arc-shaped groove (4a1) matched with the outer diameter of the screw, and the two ends of the arc-shaped groove (4a1) are provided with guide inclined surfaces (b). The supporting assembly (3) comprises two spring sheets (3b) symmetrically arranged on the two sides of the screw pipe (2) in the radial direction, the lower end of each spring sheet (3b) is provided with a blocking column (3a) extending into the inside of the screw pipe (2), the blocking column (3a) at the lower end of each spring sheet (3b) is in two groups, the four groups of blocking columns (3a) are distributed in a rectangular shape, and the end of each blocking column (3a) is a spherical surface structure (3a1). The two spring sheets (3b) and the two groups of clamping jaws (4a) are distributed around the screw pipe (2). The supporting platform (1) is provided with a rotating mechanism (5), and the rotating mechanism (5) can drive the screw pipe (2), the supporting assembly (3) and the correcting assembly (4) to rotate as a whole. The rotating mechanism (5) comprises a rudder mechanism (5a) fixed on the supporting platform (1), a driving gear (5b) fixed on the output shaft (a) of the rudder mechanism (5a), and a driven gear (5c) engaged with the driving gear (5b), the lower side of the driven gear (5c) is fixedly connected with a gasket (5d), the lower side of the gasket (5d) is fixedly connected with a rotating fixing base (5e), and the screw pipe (2), the supporting assembly (3) and the correcting assembly (4) are fixedly connected with the rotating fixing base (5e).

2. A screw receiver according to claim 1, characterized in that: The supporting platform (1) is provided with a connecting base (6) above the driven gear (5c), the connecting base (6) comprises a connecting disc (6a) and a connecting shaft (6b), the connecting disc (6a) is rotatably installed on the supporting platform (1), the connecting shaft (6b) penetrates through the middle part of the gasket (5d) downwards, the lower end of the connecting shaft (6b) is fixedly connected with the rotating fixing base (5e), the upper part of the screw pipe (2) penetrates through the rotating fixing base (5e) upwards and is embedded in the connecting shaft (6b), and the upper end of the spring sheet (3b) is embedded in the rotating fixing base (5e).

3. A screw receiver according to claim 2, wherein: The connecting base (6) is provided with a tool channel (6c) penetrating through the height direction of the connecting base (6) and a screw introduction channel (6d) extending obliquely upwards from the side of the tool channel (6c), the lower end of the tool channel (6c) is butted against the screw pipe (2), the center lines of the tool channel (6c), the screw pipe (2) and the driven gear (5c) are coincident.

4. A screw boss according to claim 2, wherein: Also include the installation base plate (7), the support platform (1) is assembled in the height direction of installation base plate (7) through slide rail assembly (8), the lower end of installation base plate (7) is provided with limit part (7a), the support platform (1) is provided with unloading spring (9) between installation base plate (7), the unloading spring (9) makes the support platform (1) downwardly abut on the limit part (7a).

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