Bottle cap pre-twist robot and method

Abstract

A bottle cap pre-tightening mechanical hand and method, comprising a rotating sleeve and a rotating shaft, the lower end of the rotating sleeve is provided with a clamping device for positioning and clamping the bottle cap, the lower end of the rotating shaft is slidably inserted into the rotating sleeve, the rotating shaft is screw-connected with the rotating sleeve, the rotating sleeve can rotate on the rotating shaft through elastic extension and contraction of an elastic member, and the upper end of the rotating shaft is provided with a one-way rotating device. In use, when the rotating shaft is pressed down through the one-way rotating device, the rotating shaft does not rotate, and the rotating sleeve rotates clockwise; when the rotating shaft is lifted up through the one-way rotating device, the rotating shaft can rotate clockwise. The rotating shaft is screw-connected with the rotating sleeve in extension and contraction, when the rotating shaft moves down, the rotating sleeve moves down, the bottle cap is clamped and corrected through the clamping device, and under the continuous pressure of the rotating shaft, the rotating sleeve rotates clockwise, so that the bottle cap is pre-tightened, and the correction and pre-tightening before opening the bottle cap are realized.

Description

Technical Field

[0001] This invention belongs to the technical field of bottle cap production equipment, and particularly relates to a bottle cap pre-twist robot and method. Background Technology

[0002] In the production of baijiu (Chinese liquor), bottle caps need to be pre-assembled. The opening cap, which is twisted open for drinking, is installed onto the fixed cap. Existing machinery directly installs the opening cap onto the fixed cap. Since the opening cap is placed onto the fixed cap by the machine, and the fixed cap has external threads while the opening cap has internal threads, there is a certain probability that the opening cap will be placed at an angle. After tightening by the tightening device, the angled installation of the opening cap will cause two problems: first, the opening cap cannot be tightened to a complete seal with the fixed cap, resulting in liquor leakage; second, after the opening cap and fixed cap are tightened, the increased friction due to thread deformation makes it difficult to open easily when drinking.

[0003] Chinese patent document CN208648699U, published / announced on March 26, 2019, discloses a bottle cap pre-tightening device. The bottom of a support column is connected to a mounting platform via a flange. An inner bottle guard plate and an outer bottle guard plate are mounted parallel to each other on the lower surface of the mounting platform via a hanging rod. A cap-feeding slide plate is installed at the end of the inner bottle guard plate. Guide wheels are symmetrically installed on both sides of the front end of the cap-feeding slide plate. A large gear and a small gear are mounted on the end of the upper wing plate via an upper bearing. The large gear and small gear are meshed together. The lower part of the large gear is meshed with a drive gear via a transmission gear. The large gear is also meshed with a forward rubbing gear. The small gear is meshed with a reverse rubbing gear. Both the forward and reverse rubbing gears are mounted on bearing sleeves on the mounting platform via rubbing wheel shafts. Rubbing wheels are installed at the lower end of each rubbing wheel shaft. A return spring is installed on a connecting rod. A cap-pressing plate is installed at the bottom end of the connecting rod. This device has a complex structure, a large mechanism, and high production costs. Furthermore, it cannot correct the bottle cap during the tightening process. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the problems existing in the background art and provide a bottle cap pre-tightening robot with a simple structure to realize the correction and pre-tightening of the bottle cap before tightening.

[0005] Another technical problem to be solved by the present invention is to provide a method for pre-twisting bottle caps using a bottle cap pre-twisting robot.

[0006] To achieve the above-mentioned technical features, the present invention aims to provide a bottle cap pre-twisting manipulator, comprising a rotating sleeve and a rotating shaft. The lower end of the rotating sleeve is equipped with a clamping device for positioning and clamping the bottle cap. The lower end of the rotating shaft is slidably inserted into the rotating sleeve. The rotating shaft and the rotating sleeve are helically connected. The rotating sleeve can elastically extend and retract on the rotating shaft via an elastic element. A one-way rotation device is installed at the upper end of the rotating shaft. In use, when the rotating shaft is pressed down by the one-way rotation device, the rotating shaft does not rotate, and the rotating sleeve rotates clockwise. When the rotating shaft is lifted by the one-way rotation device, the rotating shaft can rotate clockwise.

[0007] The outer circumference of the rotating shaft is provided with multiple spiral grooves, and the rotating sleeve is provided with corresponding positions and numbers of mating holes corresponding to the spiral grooves. Balls are installed in the mating holes, and the balls roll in contact with the spiral grooves. A limit screw is also screwed into the mating hole on the outside of the ball.

[0008] The rotating shaft has a limiting device installed above the rotating sleeve, and the elastic element is fitted on the rotating shaft and located between the limiting device and the rotating sleeve.

[0009] The limiting device is an adjusting ring, which is slidably mounted on the rotating shaft, and a set screw is screwed onto the adjusting ring.

[0010] The rotating sleeve has a limiting platform on its lower inner side. An elastic element is installed inside the rotating sleeve, with its lower end abutting against the limiting platform and its upper end abutting against the rotating shaft.

[0011] The unidirectional rotation device includes a unidirectional bearing, which is fixedly mounted on the rotating shaft.

[0012] The unidirectional rotation device also includes a fixed base, on which a unidirectional bearing is mounted.

[0013] The clamping device includes multiple clamping units, each clamping unit including a rotating block and a clamping block. The clamping block is mounted on the rotating block and has an arc-shaped structure adapted to the bottle cap. The clamping blocks on the multiple clamping units enclose a clamping space. The rotating block has a thrust block located above the clamping space. The lower end of the rotating sleeve has multiple lugs. The rotating block has a hinge hole that is pivotally connected to the lugs. When the rotating sleeve is placed longitudinally, one end of the thrust block rotates downward and the clamping block opens outward.

[0014] An opening spring is installed between the limiting platform and the thrust block on the lower side inside the rotating sleeve.

[0015] The method of using the aforementioned bottle cap pre-tightening robot for pre-tightening bottle caps includes the following steps:

[0016] S1. The robotic arm is mounted on the pressing mechanism via a one-way rotation device, wherein the rotating shaft can rotate clockwise, the rotating sleeve can rotate spirally on the rotating shaft, and the clamping device is in the open state;

[0017] S2. The bottle cap enters the lower part of the clamping device. At this time, the pressing mechanism drives the robot arm to move downward.

[0018] S3. During the downward movement, the upper end of the bottle cap passes through the clamping space of the clamping device, and then the bottle cap abuts against the push block of the clamping device. The push block rotates upward, causing the clamping block to correct and clamp the bottle cap from the circumferential direction.

[0019] S4. After the clamping device clamps the bottle cap, the pressing mechanism is still pressing down. At this time, the rotating shaft moves downward. The rotating shaft is limited by the one-way rotation device and cannot rotate, so that the rotating sleeve rotates clockwise along the direction of the spiral groove. Under the clamping of the clamping device, the bottle cap is twisted clockwise.

[0020] S5. After the pressing mechanism reaches the lower limit, the pressing mechanism rises, the pressing mechanism lifts the one-way rotating device, and the one-way rotating device moves upward;

[0021] S6. During the upward movement of the one-way rotating device, the rotating sleeve and the clamping device are held on the bottle cap by the action of the elastic element. At this time, the rotating shaft rotates clockwise and moves upward under the action of the one-way rotating device until the rotating shaft lifts the rotating sleeve, the clamping device opens, and the clamping device leaves the bottle cap, completing one cycle of bottle cap pre-twisting.

[0022] The present invention has the following beneficial effects:

[0023] 1. When the rotating shaft is pressed down by the one-way rotating device, the rotating shaft does not rotate, while the rotating sleeve rotates clockwise; when the rotating shaft is lifted up by the one-way rotating device, the rotating shaft can rotate clockwise. The rotating shaft and the rotating sleeve are connected by a spiral telescopic connection. When the rotating shaft moves down, it drives the rotating sleeve to move down, and the bottle cap is clamped and aligned by the clamping device. Under the continuous pressure of the rotating shaft, the rotating sleeve rotates clockwise, thereby pre-tightening the bottle cap, realizing the alignment and pre-tightening before opening the bottle cap.

[0024] 2. The rotating sleeve can be elastically stretched and expanded on the rotating shaft through the elastic element. During the upward movement of the one-way rotating device, the rotating sleeve and the clamping device are clamped and held on the bottle cap by the action of the elastic element. The rotating sleeve is fixed and does not rotate. The rotating shaft rotates clockwise and moves upward under the action of the one-way rotating device, thus ensuring that the rotating sleeve will not rotate in the opposite direction and loosen the bottle cap during the upward movement.

[0025] 3. The clamping device includes multiple clamping units. The clamping block is in an open state in the free state. When the bottle cap enters the clamping space, the upper end of the bottle cap abuts against the pushing force, thereby enabling the clamping block to correct and clamp the bottle cap from the circumferential direction.

[0026] 4. The rotating shaft can be rotated in one direction by setting a one-way rotation device. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0028] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0029] Figure 3 This is a three-dimensional schematic diagram from another perspective of the present invention.

[0030] Figure 4 for Figure 1 A schematic diagram of the structure of section AA in the middle.

[0031] Figure 5 This is a three-dimensional structural diagram of the rotating shaft of the present invention.

[0032] Figure 6 This is a three-dimensional structural diagram of the clamping device of the present invention.

[0033] In the picture:

[0034] Rotating sleeve 1, ear seat 11, mating hole 12, limit screw 13, limit nut 14, limit platform 15, rotating shaft 2, spiral groove 21, clamping device 3, rotating block 31, thrust block 311, mounting bolt 312, hinge hole 313, clamping block 32, clamping space 33, opening spring 34, elastic element 4, limit device 5, set screw 51, one-way rotation device 6, fixed seat 61, one-way bearing 62, ball bearing 7. Detailed Implementation

[0035] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0036] Example 1:

[0037] See Figure 1-6A bottle cap pre-tightening robot includes a rotating sleeve 1 and a rotating shaft 2. The lower end of the rotating sleeve 1 is equipped with a clamping device 3 for positioning and clamping the bottle cap. The lower end of the rotating shaft 2 is slidably inserted into the rotating sleeve 1. The rotating shaft 2 and the rotating sleeve 1 are helically connected. The rotating sleeve 1 can elastically extend and retract on the rotating shaft 2 via an elastic element 4. A one-way rotation device 6 is installed at the upper end of the rotating shaft 2. In use, when the rotating shaft 2 is pressed down by the one-way rotation device 6, the rotating shaft 2 does not rotate, and the rotating sleeve 1 rotates clockwise; when the rotating shaft 2 is lifted by the one-way rotation device 6, the rotating shaft 2 can rotate clockwise. The rotating shaft 2 and the rotating sleeve 1 are helically extended and retractable. When the rotating shaft 2 moves downward, it drives the rotating sleeve 1 to move downward, clamping the bottle cap through the clamping device 3. Under the continuous pressure of the rotating shaft 2, the rotating sleeve 1 rotates clockwise, thereby pre-tightening the bottle cap, achieving correction and pre-tightening before opening the bottle cap.

[0038] See Figure 1 , 5 The outer circumference of the rotating shaft 2 is provided with multiple spiral grooves 21. The rotating sleeve 1 is provided with corresponding positions and numbers of mating holes 12 corresponding to the spiral grooves 21. Ball bearings 7 are installed in the mating holes 12, and the ball bearings 7 roll with the spiral grooves 21. A limit screw 13 is also screwed into the mating hole 12 on the outside of the ball bearings 7. With the above structure, the rotating sleeve 1 and the rotating shaft 2 can be flexibly mated.

[0039] For details, see Figure 5 The spiral groove 21 has three channels, resulting in better stability. Figure 5 From side B, the spiral groove 21 has a left-hand spiral structure.

[0040] Of course, in addition to the above-mentioned structure, the rotating sleeve 1 and the rotating shaft 2 can also adopt a threaded connection structure or a ball screw structure.

[0041] See Figure 1-4 The elastic element 4 can be installed on the rotating shaft 2. Specifically, the rotating shaft 2 has a limiting device 5 installed above the rotating sleeve 1, and the elastic element 4 is fitted on the rotating shaft 2 and located between the limiting device 5 and the rotating sleeve 1.

[0042] Furthermore, the limiting device 5 is an adjusting ring, which is slidably mounted on the rotating shaft 2, and a set screw 51 is screwed onto the adjusting ring. The limiting device 5 can adjust its position, thereby adjusting the pressure of the elastic element 4.

[0043] In another embodiment, the elastic element 4 can also be installed inside the rotating sleeve 1 (not shown in the figure). Specifically, a limiting platform 15 is provided on the lower side of the interior of the rotating sleeve 1, and the elastic element 4 is installed inside the rotating sleeve 1. The lower end of the elastic element 4 abuts against the limiting platform 15, and the upper end abuts against the rotating shaft 2.

[0044] The elastic element 4 is preferably a helical compression spring or a wave spring.

[0045] See Figure 4 The one-way rotation device 6 includes a one-way bearing 62, which is fixedly mounted on the rotating shaft 2.

[0046] Furthermore, the one-way rotation device 6 also includes a fixed base 61, on which a one-way bearing 62 is mounted. The fixed base 61 facilitates connection and installation with the equipment (pressing mechanism).

[0047] In addition to using a one-way bearing, the one-way rotation device 6 can also use a ratchet structure.

[0048] See Figure 4 , 6 The clamping device 3 includes multiple clamping units, each including a rotating block 31 and a clamping block 32. The clamping block 32 is mounted on the rotating block 31 and has an arc-shaped structure adapted to the bottle cap. The clamping blocks 32 on the multiple clamping units together form a clamping space 33. The rotating block 31 has a push block 311 above the clamping space 33. The lower end of the rotating sleeve 1 has multiple lugs 11. The rotating block 31 has a hinge hole 313, which is pivotally connected to the lugs 11. When the rotating sleeve 1 is placed longitudinally, one end of the push block 311 rotates downward, and the clamping block 32 opens outward. With the above structure, the clamping block 32 is in an open state in its free state. When the bottle cap enters the clamping space 33, the upper end of the bottle cap abuts against the push block 311, thereby enabling the clamping block 32 to correct and clamp the bottle cap from the circumferential direction.

[0049] Specifically, there are 3 clamping units.

[0050] To ensure the clamping block 32 remains open, see [reference needed]. Figure 4 An opening spring 34 is installed between the limiting platform 15 on the lower side inside the rotating sleeve 1 and the thrust block 311.

[0051] Of course, without using the opening spring 34, the lever principle can also be used to adapt the clamping unit so that the weight of one end of the thrust block 311 is greater than the weight of one end of the clamping block 32. In this way, under the action of gravity, the clamping block 32 can also form an open state in a free state.

[0052] In addition, to ensure that the rotation of the rotating sleeve 1 is more flexible, a thrust ball bearing is installed on the rotating sleeve 1. The thrust ball bearing is fitted outside the rotating shaft 2 and abuts against the lower end of the elastic element 4.

[0053] Example 2:

[0054] The method of using the aforementioned bottle cap pre-tightening robot for pre-tightening bottle caps includes the following steps:

[0055] S1. The robotic arm is mounted onto the pressing mechanism via a one-way rotating device 6, wherein the rotating shaft 2 can rotate clockwise, the rotating sleeve 1 can spirally extend and retract on the rotating shaft 2, and the clamping device 3 is in the open state. The pressing mechanism is existing equipment.

[0056] S2. The bottle cap enters below the clamping device 3. At this time, the pressing mechanism drives the robot arm to move downward.

[0057] S3. During the downward movement, the upper end of the bottle cap passes through the clamping space 33 of the clamping device 3, and then the bottle cap abuts against the push block 311 of the clamping device 3. The push block 311 rotates upward, causing the clamping block 32 to be corrected from the circumferential direction of the bottle cap and clamp the bottle cap.

[0058] S4. After clamping device 3 clamps the bottle cap, the pressing mechanism continues to press down. See below. Figure 3 At this point, the rotating shaft 2 moves downwards, and is limited by the one-way rotating device 6, causing the rotating sleeve 1 to rotate clockwise along the direction of the spiral groove 21. Under the clamping of the clamping device 3, the bottle cap is twisted clockwise. It should be noted that the fixed bottle cap is clamped and limited at this time, while the clamping device 3 clamps the opening bottle cap.

[0059] S5. After the pressing mechanism reaches the lower limit, the pressing mechanism rises, and the one-way rotating device 6 is lifted by the pressing mechanism, and the one-way rotating device 6 moves upward.

[0060] S6. During the upward movement of the unidirectional rotating device 6, the rotating sleeve 1 and the clamping device 3 are pressed against and held onto the bottle cap by the elastic element 4, while the rotating sleeve 1 remains fixed and does not rotate. See [reference needed]. Figure 3 At this time, the rotating shaft 2 rotates clockwise and moves upward under the action of the one-way rotating device 6 until the rotating shaft 2 lifts the rotating sleeve 1, the clamping device 3 opens, the clamping device 3 leaves the bottle cap, and the bottle cap pre-twist of one process is completed.

Claims

1. A bottle cap pre-twisting robot, characterized in that: The device includes a rotating sleeve (1) and a rotating shaft (2). The lower end of the rotating sleeve (1) is equipped with a clamping device (3) for positioning and clamping the bottle cap. The lower end of the rotating shaft (2) is slidably inserted into the rotating sleeve (1). The rotating shaft (2) is screw-connected to the rotating sleeve (1). The rotating sleeve (1) can be elastically extended and retracted on the rotating shaft (2) by means of an elastic element (4). The upper end of the rotating shaft (2) is equipped with a one-way rotating device (6). In use, when the rotating shaft (2) is pressed down by the one-way rotating device (6), the rotating shaft (2) does not rotate, and the rotating sleeve (1) rotates clockwise. When the rotating shaft (2) is lifted by the one-way rotating device (6), the rotating shaft (2) can rotate clockwise. The one-way rotation device (6) includes a one-way bearing (62), which is fixedly mounted on the rotating shaft (2).

2. The bottle cap pre-twist robot according to claim 1, characterized in that: The outer circumference of the rotating shaft (2) is provided with multiple spiral grooves (21). The rotating sleeve (1) is provided with corresponding positions and numbers of mating holes (12) corresponding to the spiral grooves (21). A ball (7) is installed in the mating hole (12). The ball (7) rolls with the spiral groove (21). A limit screw (13) is screwed into the mating hole (12) on the outside of the ball (7).

3. The bottle cap pre-twist robot according to claim 1, characterized in that: The rotating shaft (2) has a limiting device (5) installed above the rotating sleeve (1), and the elastic element (4) is fitted on the rotating shaft (2) and located between the limiting device (5) and the rotating sleeve (1).

4. The bottle cap pre-twist robot according to claim 3, characterized in that: The limiting device (5) is an adjusting ring, which is slidably mounted on the rotating shaft (2), and a set screw (51) is screwed onto the adjusting ring.

5. The bottle cap pre-twist robot according to claim 1, characterized in that: The rotating sleeve (1) has a limiting platform (15) on its lower inner side. An elastic element (4) is installed inside the rotating sleeve (1). The lower end of the elastic element (4) abuts against the limiting platform (15), and the upper end abuts against the rotating shaft (2).

6. The bottle cap pre-twist robot according to claim 1, characterized in that: The unidirectional rotation device (6) also includes a fixed seat (61), and a unidirectional bearing (62) is mounted on the fixed seat (61).

7. The bottle cap pre-twist robot according to claim 1, characterized in that: The clamping device (3) includes multiple clamping units, each clamping unit including a rotating block (31) and a clamping block (32). The clamping block (32) is mounted on the rotating block (31). The clamping block (32) is an arc-shaped structure adapted to the bottle cap. The clamping blocks (32) on the multiple clamping units enclose a clamping space (33). The rotating block (31) has a thrust block (311) above the clamping space (33). The lower end of the rotating sleeve (1) is provided with multiple ear seats (11). The rotating block (31) is provided with a hinge hole (313). The hinge hole (313) is pivotally connected to the ear seat (11). When the rotating sleeve (1) is placed longitudinally, one end of the thrust block (311) rotates downward and the clamping block (32) opens outward.

8. The bottle cap pre-twist robot according to claim 7, characterized in that: An opening spring (34) is installed between the limiting platform (15) on the lower side inside the rotating sleeve (1) and the thrust block (311).

9. The method of the bottle cap pre-tightening robot as described in claim 7, used for pre-tightening bottle caps, characterized in that, Includes the following steps: S1. The robot arm is installed on the pressing mechanism via a one-way rotating device (6), wherein the rotating shaft (2) can rotate clockwise, the rotating sleeve (1) can rotate spirally on the rotating shaft (2), and the clamping device (3) is in the open state; S2. The bottle cap enters below the clamping device (3), at which point the pressing mechanism drives the robot arm to move downward; S3. During the downward movement, the upper end of the bottle cap passes through the clamping space (33) of the clamping device (3), and then the bottle cap abuts against the push block (311) of the clamping device (3). The push block (311) rotates upward, causing the clamping block (32) to correct and clamp the bottle cap from the circumferential direction. S4. After the clamping device (3) clamps the bottle cap, the pressing mechanism is still pressing down. At this time, the rotating shaft (2) moves downward. The rotating shaft (2) is limited by the one-way rotating device (6) and cannot rotate, so that the rotating sleeve (1) rotates clockwise along the direction of the spiral groove (21). Under the clamping of the clamping device (3), the bottle cap is twisted clockwise. S5. After the pressing mechanism reaches the lower limit, the pressing mechanism rises, the pressing mechanism lifts the one-way rotating device (6), and the one-way rotating device (6) moves upward; S6. During the upward movement of the one-way rotating device (6), the rotating sleeve (1) and the clamping device (3) are clamped on the bottle cap by the action of the elastic element (4). At this time, the rotating shaft (2) rotates clockwise and moves upward by the action of the one-way rotating device (6) until the rotating shaft (2) lifts the rotating sleeve (1), the clamping device (3) opens, and the clamping device (3) leaves the bottle cap, completing one cycle of bottle cap pre-twisting.

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