Cap screwing device

Abstract

The application relates to a cap screwing device, which comprises a mounting base, a driven shaft, a servo motor and a gas claw, the bottom of the mounting base is mounted on a moving platform, the servo motor is mounted on a first circular hole, the output shaft of the servo motor is connected with a driven wheel above through a gear, the head end boss of the driven shaft along the negative direction of the X axis is embedded into the positioning hole of the gas claw and locked with the gas claw through a long screw, and the side along the positive direction of the X axis of the driven shaft is inserted into the inner circular hole of a rotating shaft sleeve and passes out from the side along the positive direction of the X axis of the rotating shaft sleeve. The cap is stably screwed on the required product through the servo motor, the gear, the rotating shaft sleeve, the driven shaft and the gas claw, the driven shaft adopts a hollow design, a rotating quick-change joint is mounted at the bottom, the upper end is connected with the gas claw for air supply through a gas pipe joint, so that the winding of the gas pipe on the driven shaft is avoided, and the accuracy and stability of the cap screwing device are improved.

Description

Technical Field

[0001] This invention relates to the technical field of cap-tightening equipment, and in particular to a cap-sealing and cap-tightening device. Background Technology

[0002] With the rise and development of indwelling needle products, the demand for indwelling needles in the medical field is increasing due to their advanced functions and advantages. However, the manufacturing process of indwelling needle-related products is relatively complex and requires high standards. Currently, among domestic institutions specializing in the assembly of positive pressure connectors and three-way caps for indwelling needles...

[0003] After extensive searching, it was found that the existing technology publication number CN213623206U discloses a manual cap-tightening machine, which includes a housing, a hopper installed on the upper part of the housing, a cap slide rail disposed inside the housing and connected to the discharge port of the hopper, a forward cap channel and a reverse cap channel connected to the cap slide rail, and cap drive wheels respectively disposed at the lower ends of the forward cap channel and the reverse cap channel. The present invention conveys caps through the cap slide rail, uses sensors to identify the orientation of the caps, and then uses a pendulum needle to send the caps of the corresponding orientation into the forward cap channel and the reverse cap channel respectively. Then, the cap drive wheels drive the caps to rotate, thereby realizing the automatic rotation of the caps. By manually picking up the test tube and inserting the head of the test tube into the rotating cap, the cap can be tightened onto the test tube, realizing a certain degree of automation, improving work efficiency, and reducing labor costs.

[0004] In summary, existing cap-twisting machines require manual handling for cap-twisting operations, resulting in high labor costs and low production capacity. Furthermore, when using pneumatic grippers for cap-twisting, the process is unstable, and the air hoses are prone to getting tangled on the driven shaft.

[0005] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a cap-sealing and cap-tightening device that would have greater industrial application value. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the purpose of this invention is to provide a cap-sealing and cap-tightening device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] The cap tightening device includes a mounting base, a driven shaft, a servo motor, and a pneumatic gripper. The mounting base has a U-shaped structure, with its bottom mounted on a motion platform. A first circular hole is located near the bottom of the mounting base along the positive X-axis. A second and third circular hole are located near the top of the mounting base along the negative X-axis. The servo motor is mounted in the first circular hole, and its output shaft is connected to the driven wheel above via a gear. Two deep groove ball bearings are embedded in both the second and third circular holes. The head boss of the driven shaft along the negative X-axis is inserted into the positioning hole of the pneumatic gripper and locked to the gripper with a long screw via a threaded hole at the head end. An L-shaped threaded two-way screw is screwed into the threaded hole near the head boss of the driven shaft. Two linear bearings are... A bearing support block located between two linear bearings is fitted onto the driven shaft on the side near the positive X-axis. The first support block, driven wheel, and second support block are sequentially positioned between the second and third circular holes along the positive X-axis. The threaded end of the rotating sleeve along the negative X-axis passes sequentially through the two deep groove ball bearings in the second circular hole, the second support block, the driven wheel, and the first support block, and exits from the two deep groove ball bearings in the third circular hole. Then, a lock nut is screwed into the threaded end of the rotating sleeve along the negative X-axis. The driven shaft along the positive X-axis is inserted into the inner circular hole of the rotating sleeve and exits from the rotating sleeve along the positive X-axis. The rotary quick-change connector is screwed into the threaded hole of the driven shaft along the positive X-axis.

[0009] As a further improvement of the present invention, a guide block is provided on the side of the rotating bushing near the positive X-axis direction. The concave surface of the guide block wraps around the rotating bushing and is locked with screws. A second baffle and a first baffle are provided on the side of the guide block along the positive X-axis direction. The second baffle and the first baffle are engaged in the groove of the driven shaft and locked with screws.

[0010] As a further improvement of the present invention, a miniature air tube connector is screwed into the air inlet of the air gripper.

[0011] As a further improvement of the present invention, the pneumatic gripper is a three-jaw parallel pneumatic gripper, and the limiting support block is locked to the head of the pneumatic gripper with screws. Three second compression springs are evenly inlaid in the round hole on the side of the cylindrical boss of the limiting support block.

[0012] As a further improvement of the present invention, bearing baffles are respectively provided on both sides of the second circular hole along the X-axis direction and on one side of the third circular hole along the positive X-axis direction, and the bearing baffles are fixedly installed on the mounting base by screws.

[0013] As a further improvement of the present invention, a first compression spring is sleeved on the outside of the driven shaft located between the driven shaft head end boss and the mounting seat.

[0014] As a further improvement of the present invention, a protective cover is also provided on the outside of the mounting base.

[0015] By means of the above-described solution, the present invention has at least the following advantages:

[0016] This invention utilizes a servo motor, gears, a rotating bushing, a driven shaft, and pneumatic grippers to stably tighten caps onto the desired product. The driven shaft features a hollow design with a rotary quick-change connector at the bottom and an air hose connector at the top connecting to the pneumatic grippers for air supply. This avoids the drawback of air hoses tangling on the driven shaft, increasing the accuracy and stability of the cap tightening device. This invention can be equipped with corresponding grippers according to different cap sizes to achieve rapid and stable cap tightening and assembly, effectively saving manpower and increasing production capacity.

[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the cap-sealing and tightening device of the present invention;

[0020] Figure 2 yes Figure 1 A schematic diagram of the mounting base.

[0021] The meanings of the labels in the figures are as follows.

[0022] 1 Mounting base 2 Bearing baffle

[0023] 3 Rotating bushing 4 Guide block

[0024] 5 Second baffle 6 First baffle

[0025] 7 Driven shaft 8 First support block

[0026] 9 Second support block 10 Bearing support block

[0027] 11 Protective cover 12 Limiting support block

[0028] 13 Driven gear 14 Gear

[0029] 15 Servo motors 16 Pneumatic grippers

[0030] 17. Straight column type linear bearing 18. Locking nut

[0031] 19 L-type threaded tee; 20 Rotary quick-change coupling.

[0032] 21 Miniature air hose connector 22 Deep groove ball bearing

[0033] 23 First compression spring 24 Second compression spring

[0034] 25 First round hole 26 Second round hole

[0035] 27 Third round hole Detailed Implementation

[0036] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0037] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] Example

[0039] like Figures 1-2 As shown,

[0040] like Figure 1 It mainly includes: mounting base 1, bearing baffle 2, rotating bushing 3, guide block 4, second baffle 5, first baffle A6, driven shaft 7, first support block 8, second support block 9, bearing support block 10, protective cover 11, limit support block 12, driven wheel 13, gear 14, servo motor 15, three-jaw parallel pneumatic gripper 16, straight column type linear bearing 17, locking nut 18, L-type threaded tee 19, rotary quick-change connector 20, miniature air pipe connector 21, deep groove ball bearing 22, first compression spring 23 and second compression spring 24.

[0041] Mounting base 1 is U-shaped, with first circular holes 25, second circular holes 26, and third circular holes 27 on its two side uprights. The bottom surface has four slotted holes that connect to the equipment mounting plate with bolts. Servo motor 15 is connected to gear 14 through the first circular hole 25, and the two are fixed together by a key and a locking mechanism. Servo motor 15 is secured to mounting base 1 by two bolts through threaded holes. Two deep groove ball bearings 22 are respectively embedded in the second circular hole 26 and the third circular hole 27. A bearing baffle 2 is secured to the inner side of each of the second and third circular holes 26 and 27 with four flat-head screws, for a total of three bearing baffles 2. The driven shaft 7's head end boss is embedded in the positioning hole of a three-jaw parallel pneumatic gripper 16 and is secured to the three-jaw parallel pneumatic gripper 16 with a long screw through the head end threaded hole. An L-shaped threaded two-way valve 19 is screwed into the threaded hole. A first compression spring 23 is fitted onto the outer side of the shaft with a washer. Two straight column linear bearings 17 are sandwiched between bearing support blocks 10, which are fitted onto the outer side of the shaft. The first support block A, driven wheel 13, and second support block B9 are located between the two circular holes 26 and 27 of the mounting base 1. The threaded end of the rotating bushing 3 passes through the two deep groove ball bearings 22 in the second circular hole 26, the second support block 8 between the two vertical plates of the mounting base 1, the driven wheel 13, and the first support block 9, and exits from the two deep groove ball bearings 22 in the third circular hole 27. The locking nut 18 is screwed into the threaded end of the rotating bushing 3 to fix the rotating bushing 3 to the mounting base 1. The small end of the assembled driven shaft 7 assembly is inserted into the inner circular hole of the rotating bushing 3 and extends out from the large end of the rotating bushing 3. The concave surface of the guide block 4 wraps around the large end of the rotating bushing 3, and it is positioned with a pin and locked with screws. The first baffle A6 and the second baffle 5 are inserted into the groove and locked with screws. The rotary quick-change connector 20 is screwed into the threaded hole. The miniature air tube connector 21 is screwed into the air inlet of the three-jaw parallel air gripper 16. The limiting support block 12 is locked to the head of the three-jaw parallel air gripper 16 with screws. Three stainless steel second compression springs 24 are evenly inlaid in the round hole on the side of the cylindrical boss of the limiting support block 12. The other end of the second compression spring 24 is inlaid in the screw cap jaw. The protective cover 11 is locked to the support base 1 through the screw hole.

[0042] Brief description of the working process of this invention:

[0043] This device requires the use of an external material distribution mechanism to screw the cap onto a tee or positive pressure connector. Once the cap is moved to the designated position on the cap-screwing device, the rotary quick-change connector 21 is vented. The gas travels through the driven shaft 7 via the L-shaped threaded tee 19 and the miniature air pipe connector 21 to the three-jaw parallel air gripper 16. The air gripper drives the cap-screwing jaws to clamp the cap product. At this time, the mounting base 1 reaches the cap-screwing position under the drive of the transmission mechanism in the equipment. The driven shaft 3 is pressed downwards and compresses the first compression spring 23. The straight column-type linear bearing 17 and bearing support block 12 sleeved on the outside of the driven shaft ensure smooth downward pressing and accurate positioning of the driven shaft 3. The servo motor 15 starts, driving the gear 14 and driven wheel 13 to rotate. The rotation of the driven wheel 13 drives the rotating bushing 3 to rotate. The support of the deep groove ball bearing 22 inside the round hole of the mounting base 1 ensures smooth rotation of the rotating bushing 3. The guide block 4 and the rotating bushing 3 are locked together and rotate. The lower end of the driven shaft 7 is flat and locked in the guide block 4, so that the rotation of the guide block 4 is transmitted to the driven shaft 7. The rotation of the driven shaft 7 drives the cap to be screwed into the designated product. At the same time, the transmission shaft 3 will slide in the direction of tightening the cap. When the tightening force reaches the preset torque of the servo motor 15, the servo motor 15 stops rotating, the air in the mechanism is cut off, the gripper opens under the elastic force of the second compression spring 24, and the driven shaft 7 returns to the initial position under the elastic force of the first compression spring 23. The first baffle 6 and the second baffle 5 ensure that the driven shaft 7 does not extend too much. The driven shaft 7 adopts a hollow design and is equipped with a rotary quick-change connector 20 to avoid air pipe entanglement caused by rotation.

[0044] This invention utilizes a servo motor, gears, a rotating bushing, a driven shaft, and pneumatic grippers to stably tighten caps onto the desired product. The driven shaft features a hollow design with a rotary quick-change connector at the bottom and an air hose connector at the top connecting to the pneumatic grippers for air supply. This avoids the drawback of air hoses tangling on the driven shaft, increasing the accuracy and stability of the cap tightening device. This invention can be equipped with corresponding grippers according to different cap sizes to achieve rapid and stable cap tightening and assembly, effectively saving manpower and increasing production capacity.

[0045] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly referring to the number of technical features indicated. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0046] 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. For those skilled in the art, the specific meaning of the above terms in this invention can be understood through the specific circumstances.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A cap screwing device, comprising a mounting seat (1), a driven shaft (7), a servo motor (15) and a pneumatic claw (16), the mounting seat (1) is provided in a U-shaped structure, the bottom of the mounting seat (1) is mounted on a moving platform, a first circular hole (25) is formed on the side of the mounting seat (1) close to the bottom along the positive direction of the X-axis, and a second circular hole (26) and a third circular hole (27) are sequentially formed on the mounting seat (1) close to the top along the negative direction of the X-axis, characterized in that, The servo motor (15) is installed on the first circular hole (25), and the output shaft of the servo motor (15) is connected with the upper driven wheel (13) through the gear (14). The second circular hole (26) and the third circular hole (27) are embedded with two deep groove ball bearings (22). The head end boss of the driven shaft (7) along the negative direction of the X axis is embedded into the positioning hole of the air claw (16) and locked with the air claw (16) through the head end threaded hole by using long screws. The L-shaped threaded two-way (19) is screwed into the threaded hole near the head end boss of the driven shaft (7). Two straight column type linear bearings (17) and the bearing support block (10) located between the two straight column type linear bearings (17) are sleeved on the driven shaft (7) near the positive direction of the X axis. The first support block (8), the driven wheel (13) and the second support block (9) are sequentially located between the second circular hole (26) and the third circular hole (27) along the positive direction of the X axis. The threaded end of the rotating shaft sleeve (3) along the negative direction of the X axis sequentially penetrates the two deep groove ball bearings (22) in the second circular hole (26), the second support block (9), the driven wheel (13) and the first support block (8), and then penetrates out of the two deep groove ball bearings (22) in the third circular hole (27). Then, the locking nut (18) is screwed into the threaded end of the rotating shaft sleeve (3) along the negative direction of the X axis. The driven shaft (7) along the positive direction of the X axis is inserted into the inner circular hole of the rotating shaft sleeve (3) and penetrates out of the rotating shaft sleeve (3) along the positive direction of the X axis. The rotary quick-change connector (20) is screwed into the threaded hole of the driven shaft (7) along the positive direction of the X axis.

2. The cap- and- cap device of claim 1, wherein The rotating shaft sleeve (3) is provided with a guide block (4) near the positive direction of the X axis. The concave surface of the guide block (4) wraps the rotating shaft sleeve (3) and is locked by screws. The guide block (4) is provided with a second baffle (5) and a first baffle (6) along the positive direction of the X axis. The second baffle (5) and the first baffle (6) are clamped into the groove of the driven shaft (7) and locked by screws.

3. The cap- and- cap device of claim 1, wherein The miniature air pipe joint (21) is screwed into the air inlet of the air claw (16).

4. The cap- and- cap device of claim 1 wherein, The air claw (16) is a three-claw parallel air claw. The limit support block (12) is locked on the head of the air claw (16) by screws. The cylindrical boss side hole of the limit support block (12) is uniformly inlaid with three second compression springs (24).

5. The cap- and- cap device of claim 1 wherein, The second circular hole (26) along the X axis direction and the third circular hole (27) along the positive direction of the X axis are respectively provided with bearing baffles (2). The bearing baffles (2) are fixedly installed on the mounting seat (1) by screws.

6. The cap- and- cap device of claim 1 wherein, The outer side of the driven shaft (7) between the head end boss of the driven shaft (7) and the mounting seat (1) is sleeved with a first compression spring (23).

7. The cap- and- cap device of claim 1 wherein, The outer side of the mounting seat (1) is also provided with a protective cover (11).

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