Automatic screw tightening device

Abstract

The utility model provides an automatic screw tightening device, which relates to the technical field of automatic screw tightening equipment, and comprises at least two screw conveying pipes used for conveying different types of screws; the screw receiving base is provided with limiting grooves used for containing screws and limiting the screws, and the number of the limiting grooves corresponds to the number of the screw conveying pipes; the driving mechanism acts on the nail receiving seat and is used for driving the nail receiving seat to move to any position; the action mechanism comprises a bracket and an air suction screwdriver head which is detachably connected to the bracket; after a screw is placed in a limiting groove in the screw receiving base through the screw conveying pipe, the driving mechanism drives the screw receiving base to move to the target position corresponding to the action mechanism, the action mechanism adsorbs the screw to the air suction screwdriver head to achieve automatic tightening, and the problems that an existing screw tightening device is poor in compatibility and low in efficiency are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic screw tightening equipment, in particular to an automatic screw tightening device. Background Art

[0002] As production requirements continue to rise, the use of electronic control production lines is increasing. These are automated or semi-automated production lines for electric motors and their control systems. These lines cover the entire process, from raw material processing and component manufacturing to assembly, testing, and final product packaging, improving production efficiency and reducing costs.

[0003] Electronic control production lines often need to have the ability to produce multiple controllers at the same time, and have high requirements for the flexibility and compatibility of the equipment. In electronic control production lines, multiple screw assemblies are often required. Manual screw driving equipment is compatible with multiple screws and has good compatibility. However, the screw driving equipment is laborious to operate, has low screw driving efficiency, is prone to misplacement and missed screws, and is not suitable for mass production. Automatic screw driving equipment is efficient and has few quality problems, but the existing automatic screw driving module can only complete the tightening of screws of one specification, and the equipment compatibility is poor. Utility Model Content

[0004] In order to overcome the above technical defects, the purpose of the present invention is to provide an automatic screw tightening device to solve the problems of poor compatibility and low efficiency of existing screw tightening devices.

[0005] The utility model discloses an automatic screw tightening device, comprising:

[0006] Screw delivery tubes, including at least two, for delivering different types of screws;

[0007] The nail connector has a limiting groove for placing screws and limiting the position of the screws, wherein the number of limiting grooves corresponds to the number of screw delivery tubes;

[0008] A driving mechanism, acting on the nail connecting seat, is used to drive the nail connecting seat to move to any position;

[0009] An action mechanism, comprising a bracket and an air suction bit detachably connected to the bracket;

[0010] After the screw is placed in the limiting groove on the nail connection seat through the screw delivery tube, the driving mechanism drives the nail connection seat to move to the target position corresponding to the action mechanism, and the action mechanism absorbs the screw to the air suction bit for tightening.

[0011] Preferably, the driving mechanism includes a multi-stroke driving structure for driving the screws located in each limiting slot on the nail receiving seat to move from an initial position corresponding to the screw delivery tube to a target position corresponding to the action mechanism.

[0012] Preferably, the limiting groove is configured as a column on a side close to the groove bottom, and the inner diameter gradually increases along the side of the column away from the groove bottom toward the groove opening.

[0013] Preferably, the inner diameter of the upper column of the limiting groove is not less than the outer diameter of the rod on the screw, and is smaller than the outer diameter of the end portion with the pattern on the screw;

[0014] The notch of the limiting groove is not smaller than the outer diameter of the end portion with the pattern on the screw.

[0015] Preferably, the nail connecting seats are connected at the bottoms of the limiting grooves, and are provided with through holes extending out of the nail connecting seats.

[0016] Preferably, the action mechanism further comprises a vacuum tube connecting the bracket and the air suction bit;

[0017] One end of the vacuum tube is detachably connected to the bracket, and the other end is connected to the air suction bit.

[0018] Preferably, the bracket includes a first connecting portion and a vacuum tube connecting portion;

[0019] The vacuum tube is provided with a second connecting portion which is detachably matched with the connecting portion;

[0020] When the vacuum tube is fixed with the first connecting portion through the second connecting portion, the end portion of the vacuum tube extends into the vacuum tube connecting portion and is detachably connected to the vacuum tube connecting portion.

[0021] Preferably, a quick-change disc tool is used to replace the vacuum tube and the air suction bit.

[0022] Preferably, each of the screw delivery tubes is arranged vertically and in parallel;

[0023] The nail connection seat is located below each of the screw delivery tubes, and each limiting groove corresponds to a screw delivery tube.

[0024] Preferably, the number of the screw delivery tube and the number of the limiting grooves are both two;

[0025] The driving mechanism is configured as a double-stroke driving structure.

[0026] Compared with the existing technology, the above technical solution has the following beneficial effects:

[0027] The present application provides an automatic screw tightening device, which integrates multiple screw delivery tubes and corresponding limit grooves on the nail connection seat, so that each screw delivery tube can deliver different types of screws and place them in a unique limit groove. The nail connection seat is then driven to move by a driving mechanism, and an action mechanism with a detachable air suction bit absorbs and tightens the corresponding screws, thereby realizing automatic screw tightening. The device is compatible with multiple different types of screws, realizes batch operation, and effectively improves work efficiency, thereby solving the problems of poor compatibility and low efficiency of existing screw tightening devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural schematic diagram of an embodiment of an automatic screw tightening device according to the present utility model;

[0029] Figure 2 This is a structural diagram of the action mechanism of an embodiment of an automatic screw tightening device according to the present invention;

[0030] Figure 3 This is a structural diagram of a driving mechanism in an embodiment of an automatic screw tightening device according to the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of a nail connection seat in an embodiment of an automatic screw tightening device according to the present invention;

[0032] Figure 5 This is a structural schematic diagram of a first connecting part, a second connecting part and a vacuum tube in an embodiment of an automatic screw tightening device according to the present invention.

[0033] Reference numerals:

[0034] 1-screw delivery tube; 2-nail socket; 21-limiting groove; 22-through hole; 3-driving mechanism; 4-action mechanism; 41-bracket; 42-vacuum tube; 43-air suction bit; 44-first connecting part; 45-second connecting part; 46-vacuum tube connecting part. DETAILED DESCRIPTION

[0035] The advantages of the present invention are further described below with reference to the accompanying drawings and specific embodiments.

[0036] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0037] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0038] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining."

[0039] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0041] In the following description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention and have no specific meaning. Therefore, "module" and "component" can be used interchangeably.

[0042] Example: This embodiment discloses an automatic screw tightening device for use in batch screw production scenarios of motor controllers, such as electronic control production lines, etc. Figure 1-Figure 5 ,

[0043] The screw delivery tube 1 includes at least two screws for delivering different types of screws;

[0044] The nail connection seat 2 has a limiting groove 21 for placing screws and limiting the position of the screws, wherein the number of the limiting grooves 21 corresponds to the number of the screw delivery tubes 1;

[0045] A driving mechanism 3 acts on the nail connecting seat 2 to drive the nail connecting seat 2 to move to any position;

[0046] The action mechanism 4 includes a bracket 41 and an air suction bit 42 detachably connected to the bracket 41;

[0047] After the screw is placed in the limiting groove 21 on the nail seat 2 through the screw delivery tube 1, the driving mechanism 3 drives the nail seat 2 to move to the target position corresponding to the actuating mechanism 4, and the actuating mechanism 4 absorbs the screw to the air suction bit 42 for tightening.

[0048] In this embodiment, multiple screw delivery tubes 1 are integrated, allowing each screw delivery tube 1 to deliver a corresponding screw of a different type. Multiple limiting slots 21 are provided, and each screw delivery tube 1 specifically corresponds to a limiting slot 21. Different types of screws can then be placed into corresponding limiting slots 21 through the screw delivery tubes 1. The drive mechanism 3 then drives the connecting screw holder 2, and the action mechanism 4 operates the corresponding screw. This allows for compatibility with multiple different types of screws, enabling batch operation and effectively improving work efficiency.

[0049] It can be understood that the above-mentioned action mechanism 4 has a detachable air suction bit 42, that is, for different types of screws, the corresponding air suction bit 42 can be selected. The air suction bit 42 can conveniently absorb the screws and tighten the screws by suction.

[0050] In this embodiment, there are two screw delivery tubes 1 and two limiting grooves 21; that is, an automatic screw tightening device compatible with two types of screws is realized. Furthermore, each of the screw delivery tubes 1 is arranged vertically and in parallel; the nail connecting seat 2 is located below each of the screw delivery tubes 1, and each limiting groove 21 corresponds to a screw delivery tube 1, that is, in this embodiment, two screw delivery tubes 1 are arranged in parallel, and the nail connecting seat 2 is provided with two limiting grooves 21 along the length direction, so that the screw passes through the screw delivery tube 1 and falls directly into the corresponding limiting groove 21 under the direction of gravity, and then the nail connecting seat 2 is driven to move.

[0051] Based on the above, the driving mechanism 3 can drive the nail connecting seat 2 to move, so that it is removed from the screw delivery tube 1 and can be moved to the bottom of the action mechanism 4, so that the action mechanism 4 can absorb and tighten the screws. Since there are two or even more limit grooves 21 on the nail connecting seat 2, in order to facilitate control, it is preferred that the driving mechanism 3 includes a multi-stroke driving structure, which is used to drive the screws located in each limit groove 21 on the nail connecting seat 2 from the initial position corresponding to the screw delivery tube 1 to the target position corresponding to the action mechanism 4.

[0052] As an example, as described above, in this embodiment, two limiting grooves 21 are provided, and the above-mentioned driving mechanism 3 can be provided as a double-stroke driving structure, specifically, a double-stroke driving cylinder (i.e., two driving cylinders), each of which is arranged on both sides of the nail receiving base 2. When one of the driving cylinders is in operation, it controls one of the limiting grooves 21 to move to the position corresponding to the action mechanism 4, and when the other driving cylinder is in operation, it controls the other limiting groove 21 to move to the position corresponding to the action mechanism 4. It is understandable that this can be achieved by using a single driving cylinder (structure), and the working state and moving distance of each driving cylinder can be adjusted by a control unit. It can also be achieved by using multiple driving cylinders (structures) as described above, with each driving cylinder being set with fixed working parameters, i.e., uniquely corresponding to each limiting groove 21.

[0053] In this embodiment, the above-mentioned limit groove 21 is mainly used to place screws and facilitate the adsorption of the action mechanism 4. Specifically, the limit groove 21 is set as a column near the bottom of the groove, and the inner diameter gradually increases along the side of the column away from the bottom of the groove toward the groove opening, so that the limit groove 21 forms a funnel-like structure. The groove opening of the limit groove 21 is larger, which is convenient for the entry of the screw. The bottom of the groove is cylindrical and has a small inner diameter, which can limit the upper rod of the screw therein, and the outer diameter of the end with a pattern is partially / completely exposed for easy adsorption. Therefore, the limit groove 21 can make the screw upright in the limit groove 21.

[0054] Specifically, since the action mechanism 4 acts on the end of the screw to adsorb the screw, even if the screw is completely located in the limiting groove 21, the action mechanism 4 can still adsorb the screw from above. However, in order to reduce the risk of the screw tilting and getting stuck in the limiting groove 21, as an option, the inner diameter of the column on the limiting groove 21 is not less than the outer diameter of the rod on the screw, and smaller than the outer diameter of the end with a pattern on the screw; the notch of the limiting groove 21 is not less than the outer diameter of the end with a pattern on the screw, thereby making the outer diameter of the end with a pattern on the screw expose the cylindrical part in the limiting groove 21, rather than completely entering its cylindrical part, and only the rod on the screw enters the cylindrical part, thereby reducing the risk of the screw tilting.

[0055] In a preferred embodiment, see Figure 4 The nail connecting seat 2 is connected at the bottom of each limiting groove 21 and is provided with a through hole 22 extending from the nail connecting seat 2, so that the bottom of each limiting groove 21 is connected and provided with a through hole 22. The purpose is to facilitate the cleaning of impurities entering the limiting groove 21, reduce the impact on the use of the limiting groove 21, keep the limiting groove 21 clean, prevent the screw from tilting due to impurities entering the limiting groove 21, and improve the safety of use. It can be understood that negative pressure can be used to suck air from the through hole 22 to clean impurities, or air can be blown, or even liquid can be used for cleaning.

[0056] In this embodiment, based on the above, it can be known that the adsorption of screws and the automatic tightening of screws are achieved through the action mechanism 4. Therefore, the bracket 41 included in the above action mechanism 4 can be integrated with but not limited to an air supply device acting on the air suction bit 42, and a rotation drive structure acting on the air suction bit 42 to tighten the screw after adsorption, or a displacement drive structure can be integrated to move the air suction bit 42 after adsorbing the screw to the corresponding position to tighten the screw. Each of the aforementioned structures can be implemented using existing achievable structures, and can also be integrated with other structures that are used in different implementation scenarios and do not affect the tightening of the screws.

[0057] In this embodiment, the air suction bit 42 achieves screw adsorption through vacuum. Specifically, the actuating mechanism 4 further includes a vacuum tube 42 connecting the bracket 41 and the air suction bit 42; one end of the vacuum tube 42 is detachably connected to the bracket 41, and the other end is connected to the air suction bit 42. It is understood that the air suction bit 42 and the vacuum tube 42 can also be detachable. However, in order to improve stability during use, in this embodiment, the air suction bit 42 is replaced by the detachable vacuum tube 42.

[0058] Specifically, as an example, to achieve the above detachable Figure 1 、 2 5. The bracket 41 includes a first connecting portion 44 and a vacuum tube connecting portion 46. The vacuum connecting portion is used to connect the vacuum tube 42 and provide negative pressure, so that the air suction bit 42 can vacuum-absorb screws. The vacuum tube 42 is provided with a second connecting portion 45 that is detachably matched with the connecting portion. When the vacuum tube 42 is fixed to the first connecting portion 44 through the second connecting portion 45, the end of the vacuum tube 42 extends into the vacuum tube connecting portion 46 and is detachably connected to the vacuum tube connecting portion 46. The first connecting portion 44 and the second connecting portion 45 can be detachably connected in various existing ways, including but not limited to snap-on, magnetic, or auxiliary detachable structures. The vacuum tube 42 and the vacuum tube connecting portion 46 are similar. In this embodiment, it is preferred that the first connecting portion 44 and the second connecting portion 45 are magnetically attracted, and the vacuum tube 42 extends into the vacuum tube connecting portion 46 and is interference-fitted with the vacuum tube connecting portion 46 to improve density, improve safety during use, and reduce the situation where the screws fall off the air suction bit 42 due to insufficient adsorption force during movement.

[0059] In this embodiment, based on the above, it can be understood that different screw transmission tubes, limit slots 21 and drive mechanisms 3 are used for different types of screws, and the corresponding air suction bit 42 needs to be replaced. In this embodiment, as a preference, the device also integrates a quick-change disk tool, and uses a (robot) quick-change disk tool to replace the vacuum tube 42 and the air suction bit 42, and integrates a robotic arm. The design of the quick-change disk generally includes two main parts: the robot (robotic arm) side (main disk) and the tool side (tool disk). Both disks are equipped with precise positioning pins and locking mechanisms to ensure accurate alignment and secure locking during docking. This achieves rapid and accurate matching of the vacuum tube 42 and the air suction bit 42.

[0060] Based on the above, since the first connecting portion 44 and the second connecting portion 45 are connected by magnetic attraction ( Figure 5 ), the vacuum tube 42 extends into the vacuum tube connection portion 46 and is interference fit with the vacuum tube connection portion 46 ( Figure 1 ), when the first connecting part 44 and the second connecting part 45 are connected, the vacuum tube 42 can naturally enter the vacuum tube connecting part 46. The first connecting part 44 and the second connecting part 45 can be separated by the quick-changing disk tool to remove the vacuum tube 42 from the vacuum tube connecting part 46, and then replace it with the next one. The operation is simple and quick. Therefore, the automatic and quick change of the batch head and the vacuum tube 42 is completed through the robot quick-changing disk and the corresponding support and positioning mechanism.

[0061] In this embodiment, it can be understood that the above-mentioned automatic screw tightening device can operate different types of screws through program control to meet different usage requirements. Specifically, automatic control can be achieved by carrying a corresponding program through the control unit, thereby further improving the compatibility and adaptability of the device and improving work efficiency.

[0062] It should be noted that the embodiments of the present invention have better feasibility and do not limit the present invention in any form. Any technician familiar with the field may use the technical content disclosed above to change or modify it into an equivalent effective embodiment. However, any modifications or equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An automatic screw tightening device, characterized in that: include: Screw delivery tubes, including at least two, for delivering different types of screws; The nail connector has a limiting groove for placing screws and limiting the position of the screws, wherein the number of limiting grooves corresponds to the number of screw delivery tubes; A driving mechanism, acting on the nail connecting seat, is used to drive the nail connecting seat to move to any position; An action mechanism, comprising a bracket and an air suction bit detachably connected to the bracket; After the screw is placed in the limiting groove on the nail connection seat through the screw delivery tube, the driving mechanism drives the nail connection seat to move to the target position corresponding to the action mechanism, and the action mechanism absorbs the screw to the air suction bit to realize automatic tightening.

2. The automatic screw tightening device according to claim 1, characterized in that: The driving mechanism includes a multi-stroke driving structure for driving the screws located in each limiting slot on the nail connection seat to move from the initial position corresponding to the screw delivery tube to the target position corresponding to the action mechanism.

3. The automatic screw tightening device according to claim 1, characterized in that: The limiting groove is configured as a column on a side close to the groove bottom, and the inner diameter gradually increases along the column away from the groove bottom toward the groove opening.

4. The automatic screw tightening device according to claim 1, characterized in that: The inner diameter of the upper column of the limiting groove is not less than the outer diameter of the rod on the screw, and is smaller than the outer diameter of the end with the pattern on the screw; The notch of the limiting groove is not smaller than the outer diameter of the end portion with the pattern on the screw.

5. The automatic screw tightening device according to claim 4, characterized in that: The nail connecting seats are connected at the bottoms of the limiting grooves and are provided with through holes extending out of the nail connecting seats.

6. The automatic screw tightening device according to claim 1, characterized in that: The actuating mechanism further comprises a vacuum tube connecting the bracket and the air suction bit; One end of the vacuum tube is detachably connected to the bracket, and the other end is connected to the air suction bit.

7. The automatic screw tightening device according to claim 6, characterized in that: The bracket includes a first connecting portion and a vacuum tube connecting portion; The vacuum tube is provided with a second connecting portion which is detachably matched with the connecting portion; When the vacuum tube is fixed with the first connecting portion through the second connecting portion, the end portion of the vacuum tube extends into the vacuum tube connecting portion and is detachably connected to the vacuum tube connecting portion.

8. The automatic screw tightening device according to claim 6, characterized in that: The vacuum tube and the air suction bit are replaced using a quick-change disc tool.

9. The automatic screw tightening device according to claim 1, characterized in that: Each of the screw delivery pipes is arranged vertically and in parallel; The nail connection seat is located below each of the screw delivery tubes, and each limiting groove corresponds to a screw delivery tube.

10. The automatic screw tightening device according to claim 2, characterized in that: The screw delivery pipe and the limiting groove are both provided with two; The driving mechanism is configured as a double-stroke driving structure.

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