A lifting device

Abstract

This invention discloses a lifting device, including a base, a swing arm, a first drive mechanism, and a connecting member for connecting the object to be lifted. The connecting member is located at the swing end of the swing arm. A lifting assembly is provided on the base. The swing arm is rotatably connected to the lifting assembly. The first drive mechanism is located on the side of the swing arm away from the base and is drively connected to the lifting assembly to cause the swing arm to rotate relative to the lifting assembly. This invention can move objects such as cleaning tanks to the required position through a combination of lifting and swinging motions. It is convenient to use, and the overall structure is compact. The first drive mechanism does not occupy the space between the swing arm and the base, reducing the distance between them, which helps to reduce deformation under stress and extend service life.

Description

Technical Field

[0001] This invention relates to the field of food and pharmaceutical packaging machinery technology, and in particular to a lifting device that can be used to transport and clean cleaning tanks containing rubber stoppers and aluminum caps. Background Technology

[0002] In the food and pharmaceutical packaging machinery industry, cleaning tanks are generally used for cleaning and storing materials such as rubber stoppers and aluminum caps. Currently, after the materials such as rubber stoppers and aluminum caps are cleaned in the cleaning tank, the tank is typically lifted to a certain height by a trolley, then rotated at a specified angle, and finally manually pushed to align the discharge port of the cleaning tank with the feeding port of the filling and capping machine for discharging. This discharging method has low automation, high labor intensity, and inaccurate positioning of the discharge port of the cleaning tank with the feeding port of the filling and capping machine can easily cause wear and tear, and can also leave gaps between the discharge port and the feeding port, leading to contamination of the material during the discharging process.

[0003] Patent document CN104276412A proposes a discharging device for rubber stopper or aluminum cap filling cans. It uses a linear lifting motion unit and two rotary motion units to drive the filling can's movement, allowing for arbitrary position and angle adjustment within a plane. This ensures accurate docking of the filling can's discharge port with the receiving port, reducing wear and material contamination risks during the feeding process. However, this technical solution suffers from several drawbacks. The second drive assembly is mounted on the slide of the machine base and connected to the swing arm via a worm gear pair, resulting in a large distance between the machine base and the swing arm. Furthermore, the third drive assembly is mounted on the swing end of the swing arm near the rotating arm and connected to the rotating arm via another worm gear pair, further increasing the distance between the rotating arm and the swing arm. This, in turn, leads to an excessively large distance between the rotating arm and the machine base, causing the filling can's center of gravity to be far from the machine base. This results in significant deformation of the device under stress, reducing its service life and making it unsuitable for installation and operation in space-constrained factory environments. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a lifting device that is compact in structure, easy to use, and conducive to reducing structural deformation.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A lifting device includes a base, a swing arm, a first drive mechanism, and a connector for connecting to the object to be lifted. The connector is located at the swing end of the swing arm. A lifting assembly is provided on the base. The swing arm is rotatably connected to the lifting assembly. The first drive mechanism is located on the side of the swing arm away from the base. The first drive mechanism is drively connected to the lifting assembly to make the swing arm rotate relative to the lifting assembly.

[0007] As a further improvement to the above technical solution: the lifting assembly includes a lifting plate and a first outer gear ring fixed on the lifting plate. The swing arm is provided with a first inner ring, which is located on the inner circumference of the first outer gear ring and can rotate relative to it. The swing arm is provided with a first outer shell on the outer circumference of the first outer gear ring. The first outer shell is provided with a first drive gear. The first drive mechanism is connected to the first drive gear, and the first drive gear meshes with the first outer gear ring.

[0008] As a further improvement to the above technical solution: the first drive mechanism includes a first drive motor, a first planetary reducer and a first right-angle planetary reducer connected in sequence. The first housing is provided with a first mounting flange. The first right-angle planetary reducer is mounted on the first mounting flange and its output shaft passes through the first mounting flange and is connected to the first drive gear.

[0009] As a further improvement to the above technical solution: both the inner circumference of the first outer gear ring and the outer circumference of the first inner ring are provided with grooves, and a ball positioning part is formed between the two grooves, and a ball is provided in the ball positioning part.

[0010] As a further improvement to the above technical solution: the swing arm, the first outer shell, and the first inner ring are fixedly connected by fasteners.

[0011] As a further improvement to the above technical solution: the connecting member is a swing arm, and the swing arm is provided with a second driving mechanism for driving the swing arm to rotate. The second driving mechanism and the swing arm are respectively located on both sides of the swing arm.

[0012] As a further improvement to the above technical solution: the swing arm is provided with a connecting plate, the connecting plate is provided with a second external gear ring, the inner circumference of the second external gear ring is provided with a second inner ring that can rotate relative to it, the swing arm is provided with a second outer shell on the outer circumference of the second external gear ring, the second inner ring is fixedly connected to the second outer shell, the second outer shell is provided with a second drive gear, the second drive mechanism is connected to the second drive gear, and the second drive gear meshes with the second external gear ring.

[0013] As a further improvement to the above technical solution: the second drive mechanism includes a second drive motor, a second planetary reducer and a second right-angle planetary reducer connected in sequence. The second housing is provided with a second mounting flange. The second right-angle planetary reducer is mounted on the second mounting flange and its output shaft passes through the second mounting flange and is connected to the second drive gear.

[0014] As a further improvement to the above technical solution: an adjustment shim is provided between the connecting disc and the second external gear ring.

[0015] As a further improvement to the above technical solution, the rotating arm is a U-shaped arm.

[0016] Compared with the prior art, the advantages of the present invention are as follows: The lifting device disclosed in this invention, when the lifting assembly moves up and down on the base, can drive the swing arm, the first drive mechanism, the connecting piece, and the object to be lifted to move up and down as a whole. The first drive mechanism is located on the side of the swing arm away from the base and is connected to the lifting assembly to enable the swing arm to rotate relative to the lifting assembly. Through the combination of lifting and swinging motion, the object to be lifted, such as a cleaning tank, can be moved to the desired position. It is convenient to use, and the overall structure is compact. The first drive mechanism does not occupy the space between the swing arm and the base, reducing the distance between them, which helps to reduce deformation under stress and extend service life. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the lifting device according to Embodiment 1 of the present invention.

[0018] Figure 2 This is an exploded structural diagram of Embodiment 1 of the lifting device of the present invention.

[0019] Figure 3 This is a top view of the lifting device according to Embodiment 1 of the present invention.

[0020] Figure 4 This is a cross-sectional view of the first outer gear ring and the first inner gear ring in this invention.

[0021] Figure 5 This is a three-dimensional structural schematic diagram of the lifting device of the present invention, embodiment two.

[0022] The labels in the diagram represent: 1. Base; 11. Lifting plate; 2. Swing arm; 21. First outer shell; 22. First drive gear; 23. First mounting flange; 24. Fastener; 25. Second outer shell; 26. Second drive gear; 27. Second mounting flange; 3. Connecting piece; 31. Connecting plate; 32. Adjusting shim; 4. First drive mechanism; 41. First drive motor; 42. First planetary reducer; 43. First right-angle planetary reducer; 51. First external gear ring; 52. First inner ring; 53. Ball positioning part; 54. Ball; 61. Second external gear ring; 62. Second inner ring; 7. Second drive mechanism; 71. Second drive motor; 72. Second planetary reducer; 73. Second right-angle planetary reducer. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] Figures 1 to 4An embodiment of the lifting device of the present invention is shown. The lifting device of this embodiment includes a base 1, a swing arm 2, a first drive mechanism 4, and a connector 3 for connecting the object to be lifted (e.g., a cleaning tank). The connector 3 is located at the swing end of the swing arm 2. A lifting assembly is provided on the base 1. The swing arm 2 is rotatably connected to the lifting assembly. The first drive mechanism 4 is located on the side of the swing arm 2 away from the base 1. The first drive mechanism 4 is drively connected to the lifting assembly so that the swing arm 2 rotates relative to the lifting assembly.

[0026] In this embodiment, the lifting device, when the lifting assembly moves up and down on the base 1, can drive the swing arm 2, the first drive mechanism 4, the connecting piece 3, and the object to be lifted to move up and down as a whole. The first drive mechanism 4 is located on the side of the swing arm 2 away from the base 1 and is connected to the lifting assembly to allow the swing arm 2 to rotate relative to the lifting assembly. Through the combination of lifting and swinging motion, objects such as cleaning tanks can be moved to the desired position. It is convenient to use and has a compact overall structure. The first drive mechanism 4 does not occupy the space between the swing arm 2 and the base 1, reducing the distance between them and thus minimizing deformation under stress and extending service life. Preferably, the swing arm 2 adopts a plate-like structure and is arranged perpendicular to the horizontal plane, which helps reduce its thickness while providing good load-bearing capacity.

[0027] Furthermore, in this embodiment, the lifting assembly includes a lifting plate 11 (i.e., the lifting plate 11 drives the swing arm 2 and the whole assembly to lift and lower, and the lifting plate 11 can be driven to lift and lower, for example, by a screw and nut mechanism, cylinder, oil cylinder, etc. in the base 1) and a first outer gear ring 51 fixed on the lifting plate 11. The swing arm 2 is provided with a first inner ring 52, which is located on the inner circumference of the first outer gear ring 51 and can rotate relative to it. The swing arm 2 is provided with a first outer shell 21 on the outer circumference of the first outer gear ring 51. The first outer shell 21 is provided with a first drive gear 22. The first drive mechanism 4 is connected to the first drive gear 22, and the first drive gear 22 meshes with the first outer gear ring 51. When the swing arm 2 needs to swing, the first drive mechanism 4 is activated, driving the first drive gear 22 to rotate. Since the first drive gear 22 meshes with the first external gear ring 51 and the first external gear ring 51 is fixed on the lifting plate 11, the first drive gear 22 rotates on its own axis and revolves around the first external gear ring 51 on the other hand. At the same time, the first outer shell 21, the swing arm 2, the first inner ring 52, and the first drive mechanism 4 rotate around the first external gear ring as a whole. The structure is simple, compact, and reliable. Of course, in other embodiments, an internal gear ring can also be used. The corresponding first inner ring 52 needs to be located on the outer circumference of the internal gear ring, which can also drive the swing arm 2 to swing. The disadvantage is that it will lead to an increase in the radial dimension.

[0028] Furthermore, in this embodiment, the first drive mechanism 4 includes a first drive motor 41, a first planetary reducer 42, and a first right-angle planetary reducer 43 connected in sequence. A first mounting flange 23 is provided on the first housing 21. The first right-angle planetary reducer 43 is mounted on the first mounting flange 23, and its output shaft passes through the first mounting flange 23 and connects to the first drive gear 22. The first drive mechanism 4 has a simple and compact overall structure and reliable transmission. During operation, the first drive motor 41 drives the first drive gear 22 to rotate sequentially through the first planetary reducer 42 and the first right-angle planetary reducer 43.

[0029] In a preferred embodiment, grooves are provided on the inner circumference of the first outer gear ring 51 and the outer circumference of the first inner ring 52, and a ball positioning part 53 is formed between the two grooves. A ball 54 is provided in the ball positioning part 53, so that the first inner ring can rotate smoothly relative to the first outer gear ring, and can withstand the force exerted on the first inner ring 52 by the swing arm 2, the first drive mechanism 4 and the first housing 21, etc., to prevent the first inner ring 52 from separating from the first outer gear ring 51. The structure is simple and has good reliability.

[0030] In a preferred embodiment, the swing arm 2, the first outer shell 21 and the first inner ring 52 are fixedly connected by fasteners 24 (such as bolts, screws, etc.), which can effectively connect the swing arm 2, the first outer shell 21 and the first inner ring 52 into a whole, and facilitate disassembly and maintenance.

[0031] Furthermore, in this embodiment, the connecting member 3 is a rotating arm, and the swing arm 2 is provided with a second drive mechanism 7 for driving the rotating arm to rotate. The second drive mechanism 7 and the rotating arm are respectively located on both sides of the swing arm 2. The connecting member 3 is a rotating arm, which drives the cleaning tank and other objects to rotate, thereby adjusting them to the required angle and posture, making it more convenient to use. The second drive mechanism 7 and the rotating arm are respectively located on both sides of the swing arm 2, which helps to reduce the distance between the rotating arm and the swing arm 2, and thus reduce the distance between the rotating arm and the base 1 (specifically as follows). Figure 3 As shown in d), this helps to reduce the amount of deformation after being subjected to force and extend the service life.

[0032] Furthermore, in this embodiment, the swing arm is provided with a connecting plate 31, and the connecting plate 31 is provided with a second external gear ring 61. A second inner ring 62, which can rotate relative to the second external gear ring 61, is provided on the inner circumference of the second external gear ring 61. The swing arm 2 is provided with a second outer shell 25 on the outer circumference of the second external gear ring 61. The second inner ring 62 is fixedly connected to the second outer shell 25. A second drive gear 26 is provided on the second outer shell 25. The second drive mechanism 7 is connected to the second drive gear 26, and the second drive gear 26 meshes with the second external gear ring 61. When the swing arm needs to rotate, the second drive mechanism 7 drives the second drive gear 26 to rotate, which in turn drives the second external gear ring 61 to rotate. The swing arm 3 and the connecting plate 31 rotate with the second external gear ring 61, while the second outer shell 25 and the second inner ring 62 remain stationary. The structure is simple and compact, and the operation is reliable. The connection structure between the second external gear ring 61 and the second inner ring 62 can refer to the connection structure between the first external gear ring 51 and the first inner ring 52, and will not be described in detail here.

[0033] Furthermore, in this embodiment, the second drive mechanism 7 includes a second drive motor 71, a second planetary reducer 72, and a second right-angle planetary reducer 73 connected in sequence. A second mounting flange 27 is provided on the second housing 25. The second right-angle planetary reducer 73 is mounted on the second mounting flange 27, and its output shaft passes through the second mounting flange 27 and connects to the second drive gear 26. The second drive mechanism 7 has a simple and compact overall structure and reliable transmission. During operation, the second drive motor 71 drives the second drive gear 26 to rotate sequentially through the second planetary reducer 72 and the second right-angle planetary reducer 73.

[0034] In a preferred embodiment, an adjusting shim 32 is provided between the connecting plate 31 and the second outer gear ring 61 to facilitate the adjustment of the axial distance between the connecting plate 31 and the second outer gear ring 61, while making the end faces of the connecting plate 31 and the second outer gear ring 61 parallel.

[0035] In a preferred embodiment, the boom is a U-shaped boom. A U-shaped boom can better support objects such as cleaning tanks. Of course, in other embodiments, the boom can also be of other forms.

[0036] Example 2

[0037] Figure 5 Another embodiment of the lifting device of the present invention is shown. The lifting device in this embodiment is basically the same as that in Embodiment 1, except that: in Embodiment 1, the first drive mechanism 4 is installed perpendicular to the connecting member 3, and the first drive mechanism 4 extends above the swing arm 2, requiring a larger volume for the outer shell covering the swing arm 2. Compared with Embodiment 1, in this embodiment, the first drive mechanism 4 is installed towards the connecting member 3. While ensuring that the first drive mechanism 4 does not interfere with the connecting member 3, the first drive mechanism 4 will not extend beyond the swing arm 2, and the required volume of the outer shell covering the swing arm 2 is relatively smaller.

[0038] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A lifting device, comprising a base (1), a swing arm (2), a first drive mechanism (4), and a connecting member (3) for connecting a lifted object, wherein the rotation axis of the swing arm (2) is horizontally arranged, and the connecting member (3) is disposed at the swing end of the swing arm (2), characterized in that: The base (1) is provided with a lifting assembly, the swing arm (2) is rotatably connected to the lifting assembly, the first drive mechanism (4) is located on the side of the swing plane of the swing arm (2) away from the base (1), the first drive mechanism (4) is connected to the lifting assembly to make the swing arm (2) rotate relative to the lifting assembly, the connecting member (3) is a rotating arm, the swing arm (2) is provided with a second drive mechanism (7) for driving the rotating arm to rotate, the second drive mechanism (7) and the rotating arm are respectively located on both sides of the swing arm (2).

2. The lifting device according to claim 1, characterized in that: The lifting assembly includes a lifting plate (11) and a first outer gear ring (51) fixed on the lifting plate (11). The swing arm (2) is provided with a first inner ring (52). The first inner ring (52) is located on the inner circumference of the first outer gear ring (51) and can rotate relative to it. The swing arm (2) is provided with a first outer shell (21) on the outer circumference of the first outer gear ring (51). The first outer shell (21) is provided with a first drive gear (22). The first drive mechanism (4) is connected to the first drive gear (22). The first drive gear (22) meshes with the first outer gear ring (51).

3. The lifting device according to claim 2, characterized in that: The first drive mechanism (4) includes a first drive motor (41), a first planetary reducer (42) and a first right-angle planetary reducer (43) connected in sequence. The first housing (21) is provided with a first mounting flange (23). The first right-angle planetary reducer (43) is mounted on the first mounting flange (23) and its output shaft passes through the first mounting flange (23) and is connected to the first drive gear (22).

4. The lifting device according to claim 2, characterized in that: The inner circumference of the first outer gear ring (51) and the outer circumference of the first inner ring (52) are both provided with grooves, and a ball positioning part (53) is formed between the two grooves. A ball (54) is provided in the ball positioning part (53).

5. The lifting device according to claim 2, characterized in that: The swing arm (2), the first outer shell (21) and the first inner ring (52) are fixedly connected by fasteners (24).

6. The lifting device according to any one of claims 1 to 5, characterized in that: The rotating arm is provided with a connecting plate (31), the connecting plate (31) is provided with a second external gear ring (61), the inner circumference of the second external gear ring (61) is provided with a second inner ring (62) that can rotate relative to it, the swing arm (2) is provided with a second outer shell (25) on the outer circumference of the second external gear ring (61), the second inner ring (62) is fixedly connected to the second outer shell (25), the second outer shell (25) is provided with a second drive gear (26), the second drive mechanism (7) is connected to the second drive gear (26), and the second drive gear (26) meshes with the second external gear ring (61).

7. The lifting device according to claim 6, characterized in that: The second drive mechanism (7) includes a second drive motor (71), a second planetary reducer (72) and a second right-angle planetary reducer (73) connected in sequence. The second housing (25) is provided with a second mounting flange (27). The second right-angle planetary reducer (73) is mounted on the second mounting flange (27) and its output shaft passes through the second mounting flange (27) and is connected to the second drive gear (26).

8. The lifting device according to claim 6, characterized in that: An adjusting pad (32) is provided between the connecting plate (31) and the second external gear ring (61).

9. The lifting device according to claim 5, characterized in that: The rotating arm is a U-shaped arm.

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