A lifting mechanism

Abstract

The utility model relates to the technical field of furniture fittings, and specifically discloses a lifting mechanism, which is characterized in that a transmission assembly is arranged in transmission connection with the connecting rod mechanism, and the transmission assembly only comprises a hydraulic device in transmission connection with the connecting rod mechanism and a spring device in transmission connection with the connecting rod mechanism, so that the slow lifting of the storage rack can be realized by only using the buffering degree and elastic force of the hydraulic device and the spring device when the storage rack is lifted, thereby greatly improving the lifting stability of the storage rack, and the structure is simple, and the manufacturing cost can be greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of furniture accessories technology, and in particular to a lifting mechanism. Background Technology

[0002] Tall cabinets in kitchens, also known as storage cabinets, are often too tall, requiring users to stand on a raised structure (such as a ladder or stool) to access items. This causes inconvenience in daily life. To address this issue, a technical solution exists that incorporates a pull-down lifting mechanism with shelves inside the cabinet. The shelves are installed on both sides of the cabinet via the lifting mechanism. When items need to be retrieved, the shelves are pulled down, passing the balance point of the lifting mechanism and automatically and slowly descending under their own weight. When the shelves need to be retracted, the elastic element of the lifting mechanism automatically returns the shelves to their original position.

[0003] The prior art disclosed in patent CN217429522U is a utility model patent for a "lifting mechanism and storage cabinet". The lifting mechanism includes a frame, a connecting component, a transmission component, an elastic reset mechanism, and an elastic element switching mechanism. The elastic element switching mechanism includes a chain, a sprocket assembly, and a locking mechanism. The chain is wound around the sprocket assembly. One end of a first elastic element is connected to one end of the chain, and the other end of the first elastic element is linked to the transmission component. The other end of the chain is connected to one end of a second elastic element, and the other end of the second elastic element is connected to the frame. The locking mechanism is used to lock or unlock the operation of the chain, thereby switching the first elastic element or a combination of the first and second elastic elements to provide elastic driving force to the transmission component. The prior art uses a chain and sprocket assembly for transmission, but due to the gap error between the chain and the sprocket, the storage cabinet is unstable when lifting. In addition, the lifting mechanism in the prior art has a relatively complex structure and high manufacturing cost.

[0004] The technical problem to be solved by this application is: to design a lifting mechanism that can ensure stable lifting and lowering of the locker and has a simple structure. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a lifting mechanism that can ensure stable lifting and lowering of the locker and has a simple structure.

[0006] The technical solution adopted by this utility model is as follows: a lifting mechanism, including a mounting shell, a linkage mechanism rotatably connected thereto, a transmission component inside the mounting shell that is driven by the linkage mechanism, the transmission component including a hydraulic device driven by the linkage mechanism and a spring device driven by the linkage mechanism, and a locking component inside the mounting shell for controlling the rotation speed of the linkage mechanism and suitable for lifting heavy objects.

[0007] In some embodiments, the mounting housing is provided with a turntable rotatably connected thereto, and the linkage mechanism includes a first link and a second link rotatably connected to the mounting housing, the first link being connected to one side of the turntable.

[0008] In some embodiments, the hydraulic device includes a first hydraulic rod and a second hydraulic rod respectively connected to the turntable, a first connecting shaft is provided inside the mounting housing, and one end of the first hydraulic rod and the second hydraulic rod are connected to the first connecting shaft.

[0009] In some embodiments, the spring device includes a first spring and a second spring respectively connected to the turntable. A second connecting shaft and a third connecting shaft are also provided in the mounting housing. One end of the first spring is connected to the second connecting shaft, and the second spring is provided with a connecting block that limits and fixes it. One end of the connecting block is connected to the third connecting shaft.

[0010] In some embodiments, a first connecting rod is provided on the turntable, the first connecting rod is disposed through the turntable, one end of the first connecting rod is connected to the first connecting rod, and the other ends of the first hydraulic rod and the second hydraulic rod are respectively connected to the other end of the first connecting rod.

[0011] In some embodiments, the turntable is further provided with a second connecting rod and a third connecting rod that pass through it. The first connecting rod is connected to one end of the second connecting rod and the third connecting rod, the other end of the first spring is connected to the other end of the second connecting rod, and the other end of the second spring is connected to the other end of the third connecting rod.

[0012] In some embodiments, the mounting housing is provided with a first sliding groove, and the first connecting rod is in a limiting sliding fit with the first sliding groove.

[0013] In some embodiments, the mounting housing is provided with a second sliding groove, and the second connecting rod and the third connecting rod are both in a limiting sliding fit with the second sliding groove.

[0014] In some embodiments, the locking assembly includes a sliding column that slides with the mounting housing, a locking plate that is rotatably connected to the sliding column at one end, a pin on the mounting housing, a limiting rotational engagement between the locking plate and the pin, a hook at one end of the second spring near the third connecting shaft, a limiting groove at the other end of the locking plate, and the hook and the limiting groove being mutually locked when the linkage mechanism is used for lifting heavy objects.

[0015] In some embodiments, the mounting housing is further provided with a positioning component, which includes a positioning seat and a damping rod that slides with the positioning seat. In the initial state, the first link of the linkage mechanism abuts against the damping rod. The positioning seat is also provided with a positioning part. When the linkage mechanism rotates to its maximum extent, the first link abuts against the positioning part.

[0016] This utility model has the following technical effects: by providing a transmission component that is connected to the linkage mechanism, and the transmission component only includes a hydraulic device connected to the linkage mechanism and a spring device connected to the linkage mechanism, when the storage rack is raised or lowered, only the hydraulic device and the spring device are needed to realize the slow raising and lowering of the storage rack, thereby greatly improving the stability of the raising and lowering of the storage rack, and the structure is simple, which can greatly reduce the manufacturing cost. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the lifting mechanism of this utility model;

[0018] Figure 2 This is a schematic diagram of the locking component and hook engagement of the lifting mechanism of this utility model.

[0019] Figure 3 The lifting mechanism of this utility model Figure 2 Schematic diagram of partial structure A;

[0020] Figure 4 This is a schematic diagram of the linkage mechanism of the lifting mechanism of this utility model.

[0021] The labels and names in the diagram correspond as follows: 1. Mounting housing; 2. Linkage mechanism; 3. Hydraulic device; 4. Spring device; 5. Locking assembly; 10. Turntable; 20. First connecting rod; 21. Second connecting rod; 30. First hydraulic rod; 31. Second hydraulic rod; 32. First connecting shaft; 40. First spring; 41. Second spring; 42. Second connecting shaft; 43. Third connecting shaft; 44. Connecting block; 100. First connecting rod; 101. Second connecting rod; 102. Third connecting rod; 11. First slide groove; 12. Second slide groove; 50. Sliding column; 51. Locking plate; 52. Pin; 410. Hook; 510. Limiting groove; 6. Positioning assembly; 60. Positioning seat; 61. Damping rod; 62. Positioning part. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4This utility model provides a technical solution: a lifting mechanism, including a mounting shell 1, which is disposed on both sides of a storage rack. A linkage mechanism 2 is provided on the mounting shell 1 and rotatably connected thereto. A rotatable turntable 10 is provided in the middle of the mounting shell 1. The linkage mechanism 2 includes a first link 20 and a second link 21. One end of the first link 20 is fixedly connected to the turntable 10, one end of the second link 21 is rotatably connected to the mounting shell 1, and the other ends of the first link 20 and the second link 21 are rotatably connected to the storage rack.

[0024] A transmission assembly connected to the linkage mechanism 2 is provided inside the mounting housing 1. The transmission assembly includes a hydraulic device 3 and a spring device 4, both connected to the linkage mechanism 2. The hydraulic device 3 includes a first hydraulic rod 30 and a second hydraulic rod 31 connected to the turntable 10. A first connecting shaft 32 is provided inside the mounting housing 1. One end of the first hydraulic rod 30 and the second hydraulic rod 31 are connected to the first connecting shaft 32. A first connecting rod 100 is provided on the turntable 10, and the first connecting rod 100 passes through the turntable 10. The connecting rod 20 is connected to one end of the first connecting rod 100, and the other ends of the first hydraulic rod 30 and the second hydraulic rod 31 are respectively connected to the other end of the first connecting rod 100. The dual hydraulic rods are used. When the storage rack is raised and lowered, it drives the connecting rod mechanism 2 to rotate, thereby driving the turntable 10 to rotate. Since the first hydraulic rod 30 and the second hydraulic rod 31 are both connected to one end of the first connecting rod 100, the rotation of the turntable 10 will naturally drive the first hydraulic rod 30 and the second hydraulic rod 31 to drive the transmission. In this way, the dual hydraulic rods can better ensure the stability of the storage rack when it is raised and lowered.

[0025] The spring device 4 includes a first spring 40 and a second spring 41 respectively connected to the turntable 10. A second connecting shaft 42 and a third connecting shaft 43 are also provided inside the mounting housing 1. One end of the first spring 40 is connected to the second connecting shaft 42. The second spring 41 has a connecting block 44 fixed thereto, and one end of the connecting block 44 is connected to the third connecting shaft 43. The turntable 10 also has a second connecting rod 101 and a third connecting rod 102 that pass through it. A first connecting rod 20 is connected to one end of the second connecting rod 101 and the third connecting rod 102. The other end of the first spring 40 is connected to the other end of the second connecting rod 101, and the other end of the second spring 41 is connected to the other end of the third connecting rod 102. When the storage shelf descends... The linkage mechanism 2 drives the turntable 10 to rotate, which in turn drives the second connecting rod 101 and the third connecting rod 102 to rotate, thereby stretching the first spring 40 and the second spring 41. When the storage rack is descending, the turntable 10 rotates in the direction that drives the first hydraulic rod 30 and the second hydraulic rod 31 to retract. Therefore, the retraction force of the hydraulic device 3 and the tension of the spring device 4 are balanced, which allows the storage rack to descend smoothly. When the storage rack is rising, the linkage mechanism 2 drives the turntable 10 to rotate in the direction that causes the hydraulic device 3 to expand, while the spring device 4 uses elastic reset. At this time, the forces between the hydraulic device 3 and the spring device 4 are balanced again, which allows the storage rack to rise smoothly.

[0026] To control the rotation angle of the turntable 10 and thus the height of the storage rack, the mounting shell 1 is provided with a first sliding groove 11, and the first connecting rod 100 is in a limiting sliding engagement with the first sliding groove 11. The mounting shell 1 is also provided with a second sliding groove 12, and the second connecting rod 101 and the third connecting rod 102 are both in a limiting sliding engagement with the second sliding groove 12. When the storage rack is not descending in its initial state, the second connecting rod 101 and the third connecting rod 102 are located above the first connecting rod 100. When the storage rack descends, the first connecting rod 100 slides upward along the first sliding groove 11, and the second connecting rod 101 and the third connecting rod 102 slide downward along the second sliding groove 12. By providing the first sliding groove 11 and the second sliding groove 12, the sliding range of the first connecting rod 100, the second connecting rod 101, and the third connecting rod 102 can be limited, thereby limiting the rotation angle of the turntable 10 and controlling the descent range of the storage rack.

[0027] However, when the storage rack is loaded with heavy objects, the rack may descend too quickly due to excessive weight. Therefore, a locking assembly 5 is installed inside the mounting housing 1 to control the rotation speed of the linkage mechanism 2. The locking assembly 5 includes a sliding column 50 that slides with the mounting housing 1, and a locking plate 51 rotatably connected to the sliding column 50 at one end. A pin 52 is also provided on the mounting housing 1. The locking plate 51 and the pin 52 engage in a limiting rotational engagement to control the rotation range of the locking plate 51. A hook 410 is provided at the end of the second spring 41 near the third connecting shaft 43, and a limiting groove 510 is provided at the end of the locking plate 51. When the storage rack descends with heavy objects, the sliding column 50 is pulled outwards, and the locking plate 51, limited by the pin 52, moves towards the third connecting shaft 43. The direction is rotated, thereby locking the limiting groove 510 and the hook 410. So when the storage rack loaded with heavy objects is descending, the weight of the storage rack itself is too great, and the tension of the spring device 4 is also large. In order to prevent the storage rack from pulling the spring device 4 too much and causing the storage rack to not rise and fall smoothly, the hook 410 is locked with the limiting groove 510 of the locking plate 51. This can limit the speed at which the storage rack pulls the spring device 4, thereby limiting the rotation speed of the turntable 10. In this way, the storage rack can rise and fall smoothly even when loaded with heavy objects. When there are no heavy objects, simply press the slide column 50 back, thereby driving the locking plate 51 to rotate around the pin 52 again, so that the limiting groove 510 and the hook 410 are separated.

[0028] On the side of the mounting housing 1 where the linkage mechanism 2 is located, a positioning component 6 is also provided. The positioning component 6 includes a positioning seat 60 and a damping rod 61 that slides with the positioning seat 60. In the initial state, the first link 20 of the linkage mechanism 2 abuts against the damping rod 61. The positioning seat 60 also has a positioning part 62. When the linkage mechanism 2 rotates to its maximum limit, the first link 20 abuts against the positioning part 62. When the storage rack is not descending, this is the initial state, where the first link 20 abuts against the damping rod 61, thereby initially positioning the storage rack. When the storage rack descends to its maximum extent, the first link 20 rotates to abut against the positioning part 62 below the positioning seat 60, thereby limiting the maximum descent range of the storage rack. The direction in which the storage rack drives the linkage mechanism 2 to rotate during descent is as follows: Figure 4 As indicated by the arrow.

[0029] The working principle of this utility model is as follows: By providing a transmission component that is connected to the linkage mechanism 2, and the transmission component includes only a hydraulic device 3 and a spring device 4 that are connected to the linkage mechanism 2, when the storage rack is raised or lowered, the slow raising and lowering of the storage rack can be achieved by only using the buffering force and elastic force of the hydraulic device 3 and the spring device 4 themselves, thereby greatly improving the stability of the raising and lowering of the storage rack. Moreover, the structure is simple and can greatly reduce the manufacturing cost.

[0030] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lifting mechanism, comprising a mounting housing, characterized in that, The mounting housing is provided with a linkage mechanism rotatably connected thereto. The mounting housing is provided with a transmission component that is pulsatically connected to the linkage mechanism. The transmission component includes a hydraulic device that is pulsatically connected to the linkage mechanism and a spring device that is pulsatically connected to the linkage mechanism. The mounting housing is also provided with a locking component for controlling the rotation speed of the linkage mechanism to facilitate the lifting and lowering of heavy objects.

2. The lifting mechanism according to claim 1, characterized in that, The mounting housing is provided with a turntable rotatably connected thereto, and the linkage mechanism includes a first link and a second link rotatably connected to the mounting housing, wherein the first link is connected to one side of the turntable.

3. The lifting mechanism according to claim 2, characterized in that, The hydraulic device includes a first hydraulic rod and a second hydraulic rod respectively connected to the turntable. A first connecting shaft is provided inside the mounting housing, and one end of the first hydraulic rod and the second hydraulic rod are connected to the first connecting shaft.

4. The lifting mechanism according to claim 2, characterized in that, The spring device includes a first spring and a second spring that are respectively connected to the turntable. The mounting housing also has a second connecting shaft and a third connecting shaft. One end of the first spring is connected to the second connecting shaft. The second spring has a connecting block that limits and fixes it. One end of the connecting block is connected to the third connecting shaft.

5. The lifting mechanism according to claim 3, characterized in that, The turntable is provided with a first connecting rod, which passes through the turntable. One end of the first connecting rod is connected to the first connecting rod, and the other ends of the first hydraulic rod and the second hydraulic rod are respectively connected to the other end of the first connecting rod.

6. The lifting mechanism according to claim 4, characterized in that, The turntable is also provided with a second connecting rod and a third connecting rod that pass through it. The first connecting rod is connected to one end of the second connecting rod and the third connecting rod. The other end of the first spring is connected to the other end of the second connecting rod, and the other end of the second spring is connected to the other end of the third connecting rod.

7. The lifting mechanism according to claim 5, characterized in that, The mounting housing is provided with a first sliding groove, and the first connecting rod is in a limiting sliding fit with the first sliding groove.

8. The lifting mechanism according to claim 6, characterized in that, The mounting housing is provided with a second sliding groove, and the second connecting rod and the third connecting rod are both in a limiting sliding fit with the second sliding groove.

9. The lifting mechanism according to claim 4, characterized in that, The locking assembly includes a sliding column that slides with the mounting housing, a locking plate that is rotatably connected to the sliding column at one end, a pin on the mounting housing, a limiting rotational engagement between the locking plate and the pin, a hook at one end of the second spring near the third connecting shaft, a limiting groove at the other end of the locking plate, and the hook and the limiting groove being mutually engaged when the linkage mechanism is used for lifting heavy objects.

10. The lifting mechanism according to claim 2, characterized in that, The mounting housing is also provided with a positioning component, which includes a positioning seat and a damping rod that slides with the positioning seat. In the initial state, the first link of the linkage mechanism abuts against the damping rod. The positioning seat is also provided with a positioning part. When the linkage mechanism is rotated to its maximum extent, the first link abuts against the positioning part.

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