Detachable negative pressure screw suction nozzle

Abstract

The utility model relates to lock pay device technical field, specifically disclose a detachable formula negative pressure screw suction nozzle, the main part is the cylinder structure, and the top and bottom two ends are detachable connection top seat and base respectively. The base inside has lower chamber, and the bottom opening is used for accommodating screw when negative pressure adsorption, the main part and top seat inside part are equipped with middle chamber and upper chamber respectively and the both intercommunication, and the middle chamber is equipped with the inside bushing, and it has longitudinal displacement structure with the base top. The inside bushing is movably connected with the bit, and the bit has the first inner hole, and the top slot can separate and insert the electric bit rod, and the both constitute the synchronous rotator. The upper chamber top has the sealed bearing, and the electric bit rod passes through the sealed bearing and is connected with the outside rotary drive part, and the inside second inner hole and the bit first inner hole constitute the intercommunication channel, and the top seat one side has the negative pressure connector, and its inner chamber is connected with the upper chamber. The utility model is favorable to solve the problem that some negative pressure screw suction nozzles of the prior art adopt integral structure and need to be replaced as a whole when local wear and tear occurs.

Description

Technical Field

[0001] This utility model relates to the field of locking device technology, specifically to a replaceable negative pressure screw nozzle. Background Technology

[0002] Automatic screw fastening machines use various electric and pneumatic components to automatically feed, tighten, and inspect screws. This equipment simplifies the screw fastening process, reducing the number of workers and minimizing the negative effects of human error.

[0003] Chinese patent CN218016981U discloses a negative pressure screwdriver nozzle, comprising: an adapter connected to an external negative pressure device; a nozzle body connected to the adapter; a screwdriver rod inserted into the nozzle body; the nozzle body includes a rotating part; a venting part connected to the adapter and located below the rotating part; a limiting part for fixing the screwdriver rod; and an inner cavity for accommodating the screw. The limiting part has a venting space, which draws air from the inner cavity when the screwdriver rod passes through. Firstly, by setting a rotating part and a limiting part corresponding to the screwdriver rod, it is ensured that the screwdriver rod remains vertical during its up-and-down movement and rotation within the nozzle body, preventing swaying. Simultaneously, the venting space on the limiting part ensures that the negative pressure device connected to the adapter can completely remove the gas from the inner cavity, allowing the nozzle to tightly hold the screw in place. From the moment the screw is picked up until it is tightened, the screw maintains a stable movement.

[0004] In this technical solution, the main body of the suction nozzle is a one-piece structure, which is the same as the traditional suction nozzle structure. During use, the bottom opening of the inner cavity serves as the receiving area for the screw when it is suctioned by negative pressure. The outer contour of the screw will collide with the inner wall of this area. Due to the high frequency of screws entering and exiting during operation, the inner wall of the bottom of the suction nozzle will be worn and aged, resulting in increased friction after the screw contacts the inner wall, which in turn leads to poor stability of the screw's posture and makes it easy for material to get stuck. When this happens, even if the structure of other areas of the suction nozzle body does not show signs of wear and aging, the entire unit must be replaced, which is not only troublesome to operate but also increases maintenance costs. Utility Model Content

[0005] This invention provides a replaceable negative pressure screw nozzle, which helps to solve the problem that some existing negative pressure screw nozzles with an integrated structure need to be completely replaced when local wear and aging occur.

[0006] This utility model is implemented as follows:

[0007] A replaceable negative pressure screw suction nozzle includes a cylindrical main body with a top seat and a base detachably connected to its upper and lower ends, respectively. The base has a lower chamber, the bottom of which is an opening area for accommodating screws during negative pressure suction. The main body and the top seat each have a middle chamber and an upper chamber, which are connected. An inner liner is installed in the middle chamber, and a longitudinal displacement structure is provided between the inner liner and the top of the base. A screwdriver bit is movably connected inside the inner liner, and the bit has a first inner hole with a insertion point at the top. The slot and groove are detachably fitted with an electric screwdriver rod. After the electric screwdriver rod is inserted into the slot from top to bottom, it can form a synchronous rotating body with the screwdriver bit around the axial center line. The top of the upper chamber is equipped with a sealed bearing. The top of the electric screwdriver rod passes through the sealed bearing and is connected to an external rotating drive component. The electric screwdriver rod has a second inner hole. After the electric screwdriver rod is connected to the screwdriver bit, the first inner hole and the second inner hole form a communication channel between the lower chamber and the upper chamber. A negative pressure connector for connecting an external negative pressure device is connected to one side of the top seat. The inner cavity of the negative pressure connector is connected to the upper chamber.

[0008] Based on the above technical solution, the upper and lower ends of the main body are threadedly connected to the top seat and the base, respectively.

[0009] Based on the above technical solution, the inner diameter of the lower chamber is smaller than the inner diameter of the middle chamber, the inner side of the top of the base forms a support platform at the bottom of the middle chamber, the inner liner is set on the top of the support platform, and a spring capable of longitudinal extension and retraction is abutted between the inner liner and the support platform.

[0010] Based on the above technical solution, the longitudinal profile of the upper middle part of the bit is U-shaped, the longitudinal profile of the lower middle part of the bit is T-shaped, the side wall of the part of the bit bottom extending into the lower chamber is in clearance fit with the inner wall of the lower chamber, the side wall of the electric screwdriver rod is in clearance fit with the inner wall of the upper chamber, and the longitudinal profile of the connecting channel formed by the first inner hole and the second inner hole is I-shaped.

[0011] Based on the above technical solution, the bit is provided with a slot at the top opening of the slot, and the slot is a radially extended slot structure of the slot; the bottom of the electric screwdriver rod is provided with an insertion part that adapts to the inner contour of the slot, and the side wall of the insertion part is provided with a limiting flange that adapts to the inner contour of the slot.

[0012] Based on the above technical solution, the support platform is provided with an annular groove, the inner liner is located above the annular groove and has a radially inwardly recessed platform, the spring is sleeved on the side wall of the platform, and the annular groove constitutes the bottom limiting structure of the spring.

[0013] Compared with the prior art, the present invention has at least the following advantages:

[0014] 1. This utility model designs the suction nozzle as a detachable main body, top seat, and base structure. When a component wears out or malfunctions, such as the inner wall of the base's inner cavity becoming worn and aged due to long-term contact with screws, only the corresponding base needs to be replaced, without replacing the entire suction nozzle. This partial replacement method greatly reduces equipment maintenance costs and decreases production expenses for enterprises.

[0015] 2. The replaceable structural design of this utility model makes equipment maintenance more convenient and faster. During production, if the nozzle malfunctions or if the bit and base need to be replaced for different screws, maintenance personnel can quickly disassemble the corresponding parts and install the new parts, without spending a lot of time disassembling and reassembling the entire nozzle, thereby shortening equipment downtime and improving production efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a replaceable negative pressure screw nozzle.

[0018] Figure 2 for Figure 1 A sectional view;

[0019] Figure 3 This is a cross-sectional view of the connection between the electric screwdriver handle and the screwdriver bit.

[0020] Figure 4 for Figure 2 A magnified view of part A in the image;

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the bit;

[0022] Figure 6 This is a three-dimensional structural diagram of the electric screwdriver rod.

[0023] The diagram is labeled as follows: 100, top seat; 110, upper chamber; 120, sealed bearing; 130, negative pressure interface; 200, main body; 210, middle chamber; 300, base; 310, lower chamber; 320, support platform; 330, annular groove; 400, inner bushing; 410, countersunk platform; 420, support groove; 500, spring; 600, bit; 610, first inner hole; 620, slot; 630, slot; 700, electric screwdriver rod; 710, second inner hole; 720, insertion part; 730, limiting flange; 800, negative pressure connector. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0025] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] Combination Figures 1 to 6This embodiment discloses a replaceable negative pressure screw nozzle, which effectively solves the problem that some existing negative pressure screw nozzles adopt an integrated structure, requiring the entire nozzle to be replaced when a part wears or ages. By designing the nozzle as a replaceable structure, when a component wears or malfunctions, only the corresponding component needs to be replaced, instead of replacing the entire nozzle, thereby reducing maintenance costs and improving equipment utilization and production efficiency.

[0029] like Figure 1 and Figure 2 As shown, the replaceable negative pressure screwdriver nozzle includes a main body 200, a top seat 100, a base 300, an inner sleeve 400, a spring 500, a screwdriver bit 600, an electric screwdriver rod 700, and a negative pressure connector 800.

[0030] The main body 200 is located in the middle of the entire nozzle and is a cylindrical structure with a vertical orientation. The main body 200 serves to connect and support other components. The top seat 100 and the base 300 are detachably connected to the upper and lower ends of the main body 200 by threaded structures, respectively. This detachable connection method facilitates the installation, disassembly, and replacement of various components, making the interaction between components more flexible.

[0031] The base 300 has a lower chamber 310 inside. The bottom of the lower chamber 310 is an opening area for accommodating screws during negative pressure adsorption. The screws are adsorbed by negative pressure here and are ready for fastening. During operation, a negative pressure state with airflow drawn upward is formed inside the lower chamber 310, generating an adsorption force sufficient to adsorb the screws to the bottom of the inner side of the lower chamber 310.

[0032] The main body 200 and the top seat 100 are respectively provided with a middle chamber 210 and an upper chamber 110, and the middle chamber 210 and the upper chamber 110 are connected.

[0033] Furthermore, in combination Figure 4 As shown, the inner diameter of the lower chamber 310 is smaller than the inner diameter of the middle chamber 210. In this embodiment, the inner diameter of the lower chamber 310 is 4mm, and the inner diameter of the middle chamber 210 is 8mm. The inner side of the top of the base 300 forms a support platform 320 at the bottom of the middle chamber 210. The cross-sectional profile of the support platform 320 is an annular end face with a radial width of 2mm.

[0034] An inner liner 400 is provided in the middle chamber 210. The inner liner 400 is separably abutted against the top of the support 320. A longitudinal displacement structure is provided between the inner liner 400 and the top of the base 300. Specifically, a spring 500 capable of longitudinal extension and retraction is abutted between the inner liner 400 and the support 320. This structure allows the inner liner 400 to move longitudinally within a certain range to adapt to different working requirements and ensure the normal operation of the equipment.

[0035] The support 320 has an annular groove 330, and the inner sleeve 400 has a radially recessed countersunk platform 410 above the annular groove 330. The spring 500 is sleeved on the side wall of the countersunk platform 410, and the annular groove 330 constitutes the bottom limiting structure of the spring 500. This structural design makes the installation of the spring 500 more stable and reliable, accurately exerting its elastic buffering effect, while facilitating the installation and replacement of the spring 500. The presence of the spring 500 gives the inner sleeve 400 a certain elastic buffering capacity and provides an upward support force to the inner sleeve 400 at all times. When the bit 600 needs to descend to tighten the screw during rotational tightening, the bit 600 will compress the spring 500 during the downward movement. After the tightening action is completed, the bit 600 rises, and the spring 500 will play an auxiliary restoring role for the inner sleeve 400 and the bit 600, while ensuring good contact between the bit 600 and the screw, improving the tightening quality.

[0036] The inner sleeve 400 has a movably connected screwdriver bit 600 inside. It should be noted that the inner sleeve 400 in the drawing is a simplified representation; in reality, the radially outer side of the inner sleeve 400 is a fixed sleeve, and the radially inner side of the fixed sleeve is movably connected to a movable sleeve. The outer side of the fixed sleeve abuts against the inner wall of the central cavity and houses the spring, while the inner side of the movable sleeve contacts and rotates synchronously with the screwdriver bit. Figure 4 As shown, the inner sleeve 400 has a support groove 420 at its top center. After the bottom of the screwdriver bit 600 passes through the inner hole of the inner sleeve 400, the screwdriver bit 600 can be engaged in the support groove 420. The screwdriver bit 600 is a key component that directly contacts the screw and drives it to rotate for fastening. The screwdriver bit 600 has a first inner hole 610 inside, and a slot 620 is provided at the top of the first inner hole 610. The screwdriver bit 700 is detachably inserted into the slot 620. Specifically, as shown... Figure 2 As shown, the longitudinal profile of the upper part of the bit 600 is U-shaped. This shape design provides sufficient space for the insertion and rotation of the electric screwdriver rod 700, while ensuring the strength and stability of the bit 600 itself. The longitudinal profile of the lower part of the bit 600 is T-shaped, and the side wall of the part of the bit 600 that extends into the lower chamber 310 has a clearance fit with the inner wall of the lower chamber 310. This clearance fit ensures that the bit 600 can move up and down and rotate smoothly in the inner cavity, while avoiding excessive friction caused by an overly tight fit, thus reducing energy loss and component wear. The side wall of the electric screwdriver rod 700 has a clearance fit with the inner wall of the upper chamber 110, also to ensure the normal operation of the electric screwdriver rod 700. The connecting channel formed by the first inner hole 610 and the second inner hole 710 has an I-shaped longitudinal profile. This shape design facilitates the smooth flow of gas and improves the efficiency of negative pressure adsorption.

[0037] A sealed bearing 120 is provided at the top of the upper chamber 110. The top of the electric screwdriver rod 700 passes through the sealed bearing 120 and is connected to the external rotating drive component. It should be noted that the top of the electric screwdriver rod 700 in the attached drawing is a simplified representation; in reality, it is connected to the external rotating drive component, such as the electric screwdriver, through a connection structure such as a three-jaw clamp. The sealed bearing 120 not only supports the electric screwdriver rod 700 but also ensures the sealing of the upper chamber 110, preventing negative pressure leakage. During operation, because the electric screwdriver rod 700 has a second inner hole 710, after the electric screwdriver rod 700 is connected to the screwdriver bit 600, the first inner hole 610 and the second inner hole 710 form a communication channel between the lower chamber 310 and the upper chamber 110, allowing negative pressure to be smoothly transmitted from the external negative pressure device to the lower chamber 310, thus achieving screw attraction.

[0038] When the electric screwdriver rod 700 is inserted into the slot 620 from top to bottom, it forms a synchronous rotating body with the screwdriver bit 600, rotating around the axial center line. This ensures that under the action of the rotation drive, the electric screwdriver rod 700 and the screwdriver bit 600 can rotate synchronously, thereby achieving the screw tightening operation. Figure 3 , Figure 5 and Figure 6 The bit 600 has two opposing slots 630 at the top opening of the slot 620. The slots 630 are radially extended slot structures of the slot 620. In other embodiments, the number or shape of the slots can be changed as needed. The bottom of the electric screwdriver rod 700 has an insertion part 720 that adapts to the inner contour of the slot 620. The side wall of the insertion part 720 has a limiting flange 730 that adapts to the inner contour of the slot 630. Through the cooperation of the slots 630 and the limiting flange, when the electric screwdriver rod 700 is inserted into the slot 620 of the bit 600, the limiting flange engages in the slot 630, realizing the positioning and fixing of the electric screwdriver rod 700 and the bit 600 in the radial direction, preventing relative sliding between the electric screwdriver rod 700 and the bit 600 during rotation, and ensuring the stability of synchronous rotation.

[0039] A negative pressure interface 130 is provided on one side of the top seat 100. The negative pressure interface 130 is connected to a negative pressure connector 800. The negative pressure connector 800 is used to connect external negative pressure equipment (such as a vacuum generator). The inner cavity of the negative pressure connector 800 is connected to the upper chamber 110, thereby connecting the external negative pressure equipment with the gas channel inside the nozzle to form a complete negative pressure adsorption system.

[0040] When the automatic screw fastening machine is working, an external negative pressure device is connected to the upper chamber 110 through a negative pressure connector 800, generating negative pressure. This negative pressure is transmitted through the upper chamber 110 and the middle chamber 210 (a connecting channel formed by the first inner hole 610 and the second inner hole 710) to the lower chamber 310, creating a negative pressure adsorption area at the bottom of the lower chamber 310. When a screw needs to be adsorbed, the suction nozzle is moved to the screw placement position, and the negative pressure at the bottom of the lower chamber 310 adsorbs the screw. At this time, the screw is located at the bottom of the lower chamber 310, and the bottom of the screwdriver bit 600 is in contact with the screw. An external rotary drive unit drives the electric screwdriver rod 700 to rotate downwards via a transmission connection. Since the electric screwdriver rod 700 and the screwdriver bit 600 form a synchronous rotating body, the screwdriver bit 600 also rotates accordingly. The screwdriver bit 600 drives the screw to rotate, and simultaneously, the suction nozzle, driven by the automatic screw fastening machine, moves the screw to the designated fastening position.

[0041] During long-term use, if wear or malfunction is found in a certain part of the nozzle, such as severe wear on the inner wall of the bottom of the base 300 due to frequent collisions with the screw, resulting in unstable screw adsorption or material jamming, the part needs to be replaced. The base 300 can be directly removed from the main body 200 and the base 300 can be replaced.

[0042] Under normal operating conditions, if screws of different specifications or types need to be tightened, the matching base 300 and bit 600 can be replaced at the same time. No other parts need to be adjusted, and there is no need to spend a lot of time disassembling and assembling the entire nozzle, thereby shortening the equipment downtime and improving production efficiency.

[0043] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A replaceable negative pressure screw nozzle, characterized in that, The system includes a main body (200) with a cylindrical structure. A top seat (100) and a base (300) are detachably connected to the upper and lower ends of the main body (200). The base (300) has a lower chamber (310) inside, with the bottom of the lower chamber (310) serving as an opening area for accommodating screws during negative pressure adsorption. The main body (200) and the top seat (100) each have a middle chamber (210) and an upper chamber (110) inside, which are connected. An inner liner (400) is installed inside the middle chamber (210). A longitudinal displacement structure is provided between the inner liner (400) and the top of the base (300). A screwdriver bit (600) is movably connected inside the inner liner (400). The screwdriver bit (600) has a first inner hole (610) inside, and a slot (620) is located at the top of the first inner hole (610). An electric screwdriver rod (700) is detachably inserted into the slot (620). After the electric screwdriver rod (700) is inserted into the slot (620) from top to bottom, it can form a synchronous rotating body with the bit (600) rotating around the axial center line. A sealed bearing (120) is provided at the top of the upper chamber (110). The top of the electric screwdriver rod (700) passes through the sealed bearing (120) and is connected to an external rotating drive component. A second inner hole (710) is provided inside the electric screwdriver rod (700). After the electric screwdriver rod (700) is connected to the bit (600), the first inner hole (610) and the second inner hole (710) form a communication channel between the lower chamber (310) and the upper chamber (110). A negative pressure connector (800) for connecting an external negative pressure device is connected to one side of the top seat (100). The inner cavity of the negative pressure connector (800) is connected to the upper chamber (110).

2. The replaceable negative pressure screw nozzle according to claim 1, characterized in that, The upper and lower ends of the main body (200) are threadedly connected to the top seat (100) and the base (300), respectively.

3. The replaceable negative pressure screw nozzle according to claim 1, characterized in that, The inner diameter of the lower chamber (310) is smaller than the inner diameter of the middle chamber (210). The inner side of the top of the base (300) forms a support platform (320) at the bottom of the middle chamber (210). The inner sleeve (400) is disposed on the top of the support platform (320). A spring (500) that can extend and retract longitudinally is abutted between the inner sleeve (400) and the support platform (320).

4. The replaceable negative pressure screw nozzle according to claim 1, characterized in that, The longitudinal profile of the upper middle part of the bit (600) is U-shaped, the longitudinal profile of the lower middle part of the bit (600) is T-shaped, the side wall of the part of the bit (600) extending into the lower chamber (310) is in clearance fit with the inner wall of the lower chamber (310), the side wall of the electric screwdriver rod (700) is in clearance fit with the inner wall of the upper chamber (110), and the longitudinal profile of the connecting channel formed by the first inner hole (610) and the second inner hole (710) is I-shaped.

5. A replaceable negative pressure screw nozzle according to claim 1, characterized in that, The bit (600) is provided with a slot (630) at the top opening of the slot (620), and the slot (630) is a radially extended slot structure of the slot (620); the bottom of the electric screwdriver rod (700) is provided with an insertion part (720) that adapts to the inner contour of the slot (620), and the side wall of the insertion part (720) is provided with a limiting flange (730) that adapts to the inner contour of the slot (630).

6. A replaceable negative pressure screw nozzle according to claim 3, characterized in that, The support platform (320) is provided with an annular groove (330), and the inner bushing (400) is located above the annular groove (330) with a radially inwardly recessed platform (410). The spring (500) is sleeved on the side wall of the platform (410), and the annular groove (330) constitutes the bottom limiting structure of the spring (500).

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