Multifunctional pump cover screwing device

Abstract

The present invention provides a multifunctional pump cover screwing device, including a main cam disc and a screwing mechanism. An annular guide plate is provided at the upper end of the main cam disc, and the top of the guide plate is a closed annular curved surface; the high-position part of the guide plate is set as a high section, and the remaining part is set as a low section. A secondary cam disc is also installed on the main cam disc, which is driven by a cylinder; the secondary cam disc moves so that the low section and the high section form a cam profile or the low section and the secondary cam disc form a cam profile. The roller on the screwing mechanism rolls on the cam profile; the secondary cam disc is driven by the cylinder to switch the cam profile, thereby changing the height of the screwing mechanism and the height of the pump cover, so that the present invention is applicable to two pump covers of different lengths; in this way, not only is the operation convenient and quick, but also the machine does not need to be stopped when switching, thereby improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of capping devices, in particular to a multifunctional pump cover capping device. Background Art

[0002] Chinese patent CN205973710U discloses a cam transmission mechanism for screwing caps, including a cam plate, the top of which is a cam profile. The cam plate rotates to make the roller roll on the cam profile to achieve the lifting and lowering of the bottle cap. When the roller rolls to the highest point of the cam profile, the bottle cap is located directly above the bottle body; when the roller rolls to the lowest point of the cam profile, the bottle cap abuts against the bottle body, and the screwing cap mechanism is activated to screw the bottle cap on the bottle body.

[0003] When the bottle cap is a pump cap, a straw is installed at its lower end. For bottles of different heights, the length of the straw is also different. Therefore, when replacing pump caps of different lengths, different cam discs need to be replaced to change the height of the highest point of the cam profile. In this way, not only is the disassembly and assembly operation complicated, but the cost is also relatively high. To solve this problem, Chinese patent CN204041917U discloses a split replaceable cam, including a main disc and a sub-disc, and the cam profile is replaced by disassembling and assembling the sub-disc. Chinese patent CN204755833U also discloses a multifunctional split cam, which changes the original curve profile by adding a second cam disc on the inner or outer side of the side wall of the first cam disc to form a new curve profile. Although the above two methods do not require the replacement of the main disc or the first cam disc, they both involve the disassembly and assembly of the sub-disc or the second cam disc, and the disassembly and assembly process is not only complicated and time-consuming, but also requires shutdown operation, thereby reducing production efficiency. Summary of the invention

[0004] In order to solve the technical problems in the background technology, the present invention discloses a multifunctional pump cover screwing device.

[0005] The present invention provides a multifunctional pump cover screwing device, comprising a main cam disc and a screwing mechanism, wherein an annular guide plate is arranged at the upper end of the main cam disc, and the top of the guide plate is a closed annular curved surface; the high-position part of the guide plate is set as a high section, and the remaining part is set as a low section; an auxiliary cam disc is also installed on the main cam disc and driven by a cylinder; the auxiliary cam disc moves so that the low section and the high section form a cam profile or the low section and the auxiliary cam disc form a cam profile.

[0006] The roller on the capping mechanism rolls on the cam profile; the auxiliary cam plate is driven by the cylinder to switch the cam profile, thereby changing the height of the capping mechanism and the height of the pump cover, so that the present invention is suitable for pump covers of two different lengths; in this way, not only is the operation convenient and fast, but there is no need to stop the machine when switching, thereby improving production efficiency.

[0007] If the high section can also be moved and synchronously driven by the cylinder to connect or move away from the low section, sufficient moving space is required, which will not only waste space but also easily cause collision and damage with the screw cap mechanism. Therefore, further improvements are made to solve this problem. Specifically, the high section and the low section are integrally formed and fixed, and the auxiliary cam disc is pressed against the guide plate to replace the high section to form a cam profile.

[0008] When the auxiliary cam disc replaces the high section, it is difficult to replace the original position of the high section due to the fixed high section, so there will be a position difference, and using one roller is suitable for two cam profiles, which has poor stability. Based on this, further improvements are made: the capping mechanism is connected with a first roller and a second roller; when the auxiliary cam disc is away from the high section, only the first roller rolls on the cam profile; when the auxiliary cam disc is against the guide plate, the second roller rolls on the top of the auxiliary cam disc, and the first roller rolls only on the low section.

[0009] When the auxiliary cam replaces the high section, if there is a height difference at the connection between the auxiliary cam and the low section, impact will occur, thereby affecting the stability of the screw cap, so further improvements are made to solve this problem. Specifically, the auxiliary cam and the end connection of the low section are of the same height.

[0010] Since the guide plate is annular and the auxiliary cam disc is arc-shaped, if there is a gap between the guide plate and the auxiliary cam disc, it will be difficult to adjust the shape of the auxiliary cam disc, making it difficult for the first roller to smoothly transition to the low section; and when the cylinder drives the auxiliary cam disc, there will be position errors, further increasing the difficulty of the first roller to smoothly transition to the low section; and using a limit device to improve the position accuracy of the auxiliary cam disc will complicate the structure of the present invention and increase the cost, so further improvements are made to solve this problem, specifically, the auxiliary cam disc is fitted with the guide plate. In this way, it is easy to judge the height difference at the connection between the auxiliary cam disc and the low section, so it is easy to adjust the shape of the end of the auxiliary cam disc, so that the roller smoothly transitions to the low section.

[0011] In order to save space and avoid collision with the capping mechanism, a further design is that the auxiliary cam disc is located on the inner side of the guide plate.

[0012] If the moving direction of the auxiliary cam disc forms an angle with the axial direction of the main cam disc, it is easy to collide with the main cam disc and cause deformation, thereby affecting the service life. Therefore, further improvements are made to solve this problem. Specifically, the auxiliary cam disc is driven to rise and fall by a cylinder. In this way, the auxiliary cam disc always fits with the inner wall of the guide plate to avoid collision and deformation.

[0013] The specific structure of the cylinder driving the auxiliary cam plate to rise and fall is: a base is installed on the main cam plate, and the base is connected to the top plate through two symmetrically arranged guide pillars; the cylinder is installed at the lower end of the base; a linear bearing is installed on the guide pillar, and the linear bearing is fixedly connected to the auxiliary cam plate.

[0014] Since position error is easy to occur when the auxiliary cam disc is assembled, a further improvement is that two symmetrically arranged arc holes are opened on the base, and the base is fixedly connected to the main cam disc through the arc holes, so that the position of the auxiliary cam disc can be adjusted, thereby avoiding position error. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 is a top view of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the hidden screw capping mechanism of the present invention;

[0019] Figure 4 is a top view of the main cam plate;

[0020] In the figure: 1. main cam plate; 2. capping mechanism; 3. cylinder; 4. auxiliary cam plate; 5. first roller; 6. second roller; 11. guide plate; 12. high section; 13. low section; 14. base; 15. guide column; 16. top plate; 17. linear bearing; 18. arc hole. DETAILED DESCRIPTION

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0022] Embodiment 1:

[0023] like Figure 1 As shown, the present invention is a multifunctional pump cover screwing device, comprising a main cam plate 1 and a screwing mechanism 2. An annular guide plate 11 is provided at the upper end of the main cam plate 1, and the top of the guide plate 11 is a closed annular curved surface, such as Figure 4 As shown, the high portion is set as a high section 12, and the remaining portion is set as a low section 13. The height of the high section 12 decreases from the middle to both sides.

[0024] A secondary cam plate 4 is installed inside the main cam plate 1 and driven by the cylinder 3. The position setting of the secondary cam plate 4 can not only save space, but also avoid collision with the capping mechanism 2. Figure 3As shown, a base 14 is installed on the main cam disc 1. The base 14 is arc-shaped, concentric with the main cam disc 1, and is fixed by bolts. The base 14 is connected to the top plate 16 through two symmetrically arranged guide pillars 15. Both ends of the guide pillar 15 are provided with shoulders and threaded holes. The shoulders are respectively clamped to the top plate 16 and the base 14, and the bolts pass through the top plate 16 or the base 14 and are threadedly connected to the guide pillar 15 to achieve fixation. A linear bearing 17 is installed on the guide pillar 15. The auxiliary cam disc 4 is composed of a vertically arranged guide part and a mounting part. The guide part is arranged vertically, and its height decreases from the middle to both sides; the mounting part is arranged horizontally and fixedly connected to the linear bearing 17. The cylinder 3 is installed at the lower end of the base 14, and its piston rod is fixedly connected to the mounting part, so as to realize the lifting and lowering of the auxiliary cam disc 4.

[0025] When the auxiliary cam disc 4 descends, the high section 12 and the low section 13 form a cam profile; when the auxiliary cam disc 4 rises, the top of the guide portion and the low section 13 form a cam profile. A roller is connected to the capping mechanism 2 and is in rolling connection with the cam profile. The main cam disc 1 rotates to drive the roller to rise and fall.

[0026] The auxiliary cam plate 4 is driven by the cylinder 3 to switch the cam profile, thereby changing the height of the capping mechanism 2 and the height of the pump cover, so that the present invention is applicable to two pump covers of different lengths; in this way, not only is the operation convenient and fast, but there is no need to stop the machine when switching, thereby improving production efficiency.

[0027] Embodiment 2:

[0028] Compared with the first embodiment, the difference is that if the high section 12 can also move and be synchronously driven by the cylinder 3 to connect or move away from the low section 13, sufficient moving space is required, which will not only waste space, but also easily collide with the capping mechanism 2 and cause damage. Therefore, the high section 12 is fixed on the main cam disc 1 and connected to the low section 13 in one piece. It rises through the auxiliary cam disc 4 to replace the high section 12.

[0029] Embodiment three:

[0030] Compared with the second embodiment, the difference is: Figure 2 As shown, the first roller 5 and the second roller 6 are connected to the capping mechanism 2; when the auxiliary cam disc 4 is away from the high section 12, only the first roller 5 rolls on the cam profile; when the auxiliary cam disc 4 is against the guide plate 11, the second roller 6 rolls on the top of the auxiliary cam disc 4, and the first roller 5 only rolls on the low section 13. In this way, the rollers have a higher rolling stability on the cam profile.

[0031] Embodiment 4:

[0032] Compared with the third embodiment, the difference is that when the auxiliary cam disc 4 replaces the high section 12, if there is a height difference at the connection between the auxiliary cam disc 4 and the low section 13, an impact will be generated, thereby affecting the stability of the screw cap. Therefore, the following design is made: the height of the connection between the end of the auxiliary cam disc 4 and the low section 13 is consistent.

[0033] Embodiment five:

[0034] Compared with the fourth embodiment, the difference is that the auxiliary cam plate 4 is fitted with the guide plate 11. In this way, it is easy to judge the height difference between the auxiliary cam plate 4 and the lower section 13, so as to adjust the shape of the end of the auxiliary cam plate 4 so that the roller smoothly transitions to the lower section 13.

[0035] Embodiment six:

[0036] Compared with the fifth embodiment, the difference is that two symmetrically arranged arc holes 18 are provided on the base 14. The arc holes 18 are concentric with the main cam disc 1, and the bolts pass through the arc holes 18 and are threadedly connected with the main cam disc 1 to fix the base 14. The provision of the arc holes 18 makes the position of the auxiliary cam disc 4 adjustable, thereby improving the position accuracy of the auxiliary cam disc 4 and avoiding position errors.

[0037] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A multifunctional pump cover screwing device, comprising a main cam plate (1) and a screwing mechanism (2), wherein an annular guide plate (11) is provided at the upper end of the main cam plate (1), and the top of the guide plate (11) is a closed annular curved surface; the high portion of the guide plate (11) is set as a high section (12), and the remaining portion is set as a low section (13), characterized in that: The main cam disc (1) is also provided with an auxiliary cam disc (4) which is driven by a cylinder (3); The auxiliary cam plate (4) moves so that the low section (13) and the high section (12) form a cam profile or the low section (13) and the auxiliary cam plate (4) form a cam profile.

2. The multifunctional pump cover screwing device according to claim 1, characterized in that: The high section (12) and the low section (13) are integrally formed and fixed, and the auxiliary cam disc (4) abuts against the guide plate (11), replacing the high section (12) to form a cam profile.

3. The multifunctional pump cover screwing device according to claim 2, characterized in that: The capping mechanism (2) is connected to a first roller (5) and a second roller (6); When the auxiliary cam disc (4) is away from the high section (12), only the first roller (5) rolls on the cam profile; When the auxiliary cam disc (4) abuts against the guide plate (11), the second roller (6) rolls on the top of the auxiliary cam disc (4), and the first roller (5) rolls only on the low section (13).

4. The multifunctional pump cover screwing device according to claim 3, characterized in that: When the auxiliary cam plate (4) replaces the high section (12), the height of the connecting part of the ends of the auxiliary cam plate (4) and the low section (13) is consistent.

5. The multifunctional pump cover screwing device according to claim 4, characterized in that: The auxiliary cam disc (4) is in contact with the guide plate (11).

6. The multifunctional pump cover screwing device according to claim 5, characterized in that: The auxiliary cam plate (4) is located on the inner side of the guide plate (11).

7. The multifunctional pump cover screwing device according to claim 6, characterized in that: The auxiliary cam plate (4) is driven to rise and fall by a cylinder.

8. The multifunctional pump cover screwing device according to claim 7, characterized in that: A base (14) is mounted on the main cam disc (1), and the base (14) is connected to a top plate (16) via two symmetrically arranged guide pillars (15); The cylinder (3) is mounted on the lower end of the base (14); A linear bearing (17) is installed on the guide column (15), and the linear bearing (17) is fixedly connected to the auxiliary cam disc (4).

9. The multifunctional pump cover screwing device according to claim 8, characterized in that: The base (14) is provided with two symmetrically arranged arc-shaped holes (18), and is fixedly connected to the main cam disc (1) via the arc-shaped holes (18).

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