Lifting mechanism for lifting cabinet

Abstract

A lifting mechanism for a lifting cupboard comprises a base fixed to a side plate of a cupboard body, a vertical guide rail is installed in the base, a sliding block is installed in the vertical guide rail in an up-down sliding mode, the sliding block is connected with a lifting inner cupboard, and the lifting inner cupboard conducts lifting motion along the bottom of the cupboard body under the guiding and supporting effects of the vertical guide rail and the sliding block. An upper gear and a lower gear are further installed in the base, the upper gear and the lower gear are connected through a chain, the upper gear is connected with a power mechanism and driven by the power mechanism to rotate, the chain is connected with a sliding block through a clamping base, and when the chain moves, the sliding block is driven by the clamping base to move. Therefore, the lifting inner cabinet is driven to do lifting motion. The lifting mechanism has the advantages that the gear motor is adopted to drive the transmission shaft, and the transmission shaft is connected with the left lifting mechanism and the right lifting mechanism at the same time, so that the lifting mechanisms on the left side and the right side can achieve completely synchronous lifting motion under driving of the same transmission shaft.

Description

Technical Field

[0001] The utility model relates to a cabinet accessory, in particular to a lifting mechanism for a lifting cabinet. Background Art

[0002] With the continuous advancement of modern kitchen design, cabinets not only serve as storage but also increasingly incorporate intelligent and automated design concepts to improve user convenience and safety. Cabinets with lift functions have garnered widespread attention and application in recent years. This mechanism allows users to freely adjust the cabinet's height as needed, making items within the cabinet easier to access and particularly suitable for items stored high up.

[0003] Among the various lift cabinet designs currently available on the market, a wire hoist mechanism is a relatively common lifting method. A wire hoist mechanism uses a motor to drive a wire rope that winds around a hoist wheel, thereby raising and lowering the cabinet. This design offered certain advantages in its early applications, such as its relatively simple structure and low cost, leading to its widespread adoption. However, as practical problems gradually emerged, the limitations of the wire hoist mechanism became increasingly apparent, particularly in terms of cabinet stability and reliability, leaving significant room for improvement.

[0004] The main disadvantages of the wire hoist mechanism used in the prior art include:

[0005] 1. The left and right guide rails are not running parallel: Because the wire hoist mechanism operates by winding a wire rope to achieve lift and lowering, this winding process is often difficult to achieve completely synchronized and uniform. If the wire rope becomes slightly loose, misaligned, or unevenly stressed during the hoisting process, the left and right guide rails will not run parallel. This non-parallelism directly affects the smooth lifting of the cabinet, easily causing the cabinet to tilt or shift during the lifting process.

[0006] 2. Jamming: When the left and right guide rails are not parallel, the cabinet's sliding mechanism is susceptible to additional lateral stress. This stress can cause the slider or rail to become stuck, preventing the cabinet from moving smoothly. In severe cases, jamming can even damage the lifting mechanism, affecting the cabinet's normal operation.

[0007] 3. Wire rope wear and life: Wire ropes are subject to repeated winding and stretching during long-term use, which inevitably leads to wear and fatigue. This is especially true when the wire ropes are subjected to uneven force, which can significantly affect the life and reliability of the entire lifting mechanism.

[0008] 4. Difficulty in Maintenance: Wire rope winches are difficult to maintain when problems arise, especially when the wire rope becomes loose or worn. This often requires professional technicians to repair or replace the rope. This not only increases maintenance costs for users but can also affect the long-term performance of the cabinet.

[0009] 5. Safety hazards: Wear on the wire rope and the misalignment of the left and right guide rails can lead to instability during the lifting process, posing a potential safety hazard to the cabinet. If the cabinet becomes stuck or tilted during lifting, items inside the cabinet may fall, or even lead to more serious accidents. Therefore, further improvements are necessary. Utility Model Content

[0010] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a lifting mechanism for a lifting cabinet that is simple in structure, easy to use, and can effectively improve the stability, safety and durability of the lifting cabinet.

[0011] The purpose of the utility model is achieved by the following method: a lifting mechanism for a lifting cabinet, which includes a base fixed to the side panel of the cabinet body, a vertical guide rail installed in the base, a slider installed in the vertical guide rail in an up-and-down sliding manner, the slider being connected to the lifting inner cabinet, and the lifting inner cabinet performing a lifting movement along the bottom of the cabinet body under the guidance and support of the vertical guide rail and the slider;

[0012] An upper gear and a lower gear are also installed in the base. The upper and lower gears are connected by a chain. The upper gear is connected to the power mechanism and is driven to rotate by the power mechanism. The chain is connected to the slider through the clamping seat. When the chain moves, the slider is driven to move through the clamping seat, thereby driving the lifting inner cabinet to move up and down.

[0013] Furthermore, the surface of the base is also covered with a surface cover, and a receiving area is formed between the surface cover and the base, and the vertical guide rail, the slider, the upper gear and the lower gear are covered in the receiving area.

[0014] Furthermore, a guide groove is vertically provided on the surface cover, and a guide area is extended outward from the slide block. The guide area extends out of the surface cover through the guide groove and is connected to the lifting inner cabinet.

[0015] Furthermore: an upper limit switch and a lower limit switch are also provided in the base, and correspondingly, a touch block is provided on the clamping seat to contact the upper limit switch or the lower limit switch to generate an electric control signal.

[0016] Furthermore: a connecting hole is provided at the center of the upper gear, and the power mechanism is connected to the connecting hole through a transmission shaft and drives the upper gear to rotate.

[0017] Furthermore: the power mechanism is a reduction gearbox, the input shaft of the reduction gearbox is connected to the drive motor, and the output shaft of the reduction gearbox is connected to the transmission shaft.

[0018] Furthermore: the transmission shaft is horizontally arranged on the top of the lifting inner cabinet, and its two ends are respectively connected to the lifting mechanism, and when the transmission shaft rotates, the lifting mechanism is synchronously driven to move.

[0019] The beneficial effects of the utility model are: 1. Simple structure, low production cost and improved market competitiveness.

[0020] 2. This utility model utilizes a reduction motor to drive a drive shaft that connects both left and right lifting mechanisms. This design allows the left and right lifting mechanisms to achieve fully synchronized lifting motion, driven by a single drive shaft. Compared to traditional wire winches, this design avoids the problem of asynchronous operation of the left and right guide rails due to uneven winding or unbalanced force on the wire rope. This fundamentally eliminates tilting and jamming during the lifting process, ensuring smooth operation of the cabinet.

[0021] 3. Gear chain mechanism has a higher transmission efficiency in mechanical transmission. Compared with wire rope transmission, chain transmission has better rigidity and can maintain stable transmission effect under high load conditions. In addition, the meshing of gears and chains can achieve a precise transmission ratio, ensuring the movement accuracy during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a rendering of the utility model showing the lifting inner cabinet in a closed state.

[0023] Figure 2 This is a rendering of the liftable inner cabinet in the utility model in the open state.

[0024] Figure 3 、 4 This is a rendering of the utility model showing the lifting inner cabinet in the open state after the cabinet body is hidden.

[0025] Figure 5 This is a schematic diagram of the structure of the hidden cabinet and the lifting inner cabinet in the present invention.

[0026] Figure 6 This is a schematic structural diagram of the utility model.

[0027] Figure 7 This is a structural exploded view of the utility model.

[0028] Figure 8 This is a schematic diagram of the structure behind the hidden cover of the utility model.

[0029] Figure 9 This is an exploded view of the slider and base in the utility model.

[0030] Figure 10 This is a structural diagram of the slider of the utility model. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings. A lifting mechanism for a liftable cabinet comprises a base 2 fixed to a side panel 1 of the cabinet body, a vertical guide rail 3 mounted within the base 2, a slider 4 mounted within the vertical guide rail 3 for upward and downward sliding movement, the slider 4 being connected to a liftable inner cabinet 5. The liftable inner cabinet 5 is guided and supported by the vertical guide rail 3 and the slider 4 to move upward and downward along the bottom of the cabinet body.

[0032] An upper gear 21 and a lower gear 22 are also installed in the base 2. The upper and lower gears are connected by a chain 23. The upper gear 21 is connected to the power mechanism and is driven to rotate by the power mechanism. The chain 23 is connected to the slider 4 through the clamping seat 24. When the chain 23 moves, the slider 4 is driven to move through the clamping seat 24, thereby driving the lifting inner cabinet 5 to move up and down.

[0033] In one embodiment, the surface of the base 2 is further covered with a cover 6 , and a receiving area is formed between the cover 6 and the base 2 , and the vertical guide rail 3 , the slider 4 , the upper gear 21 and the lower gear 22 are covered in the receiving area.

[0034] In one embodiment, a guide groove 61 is vertically provided on the surface cover 6 , and a guide area 41 is extended outward from the slider 4 . The guide area 41 extends out of the surface cover 6 through the guide groove 61 and is connected to the lifting inner cabinet 5 .

[0035] In one embodiment, an upper limit switch 25 and a lower limit switch 26 are further provided in the base 2. Correspondingly, a touch block 27 is provided on the clamping seat 24 to contact the upper limit switch 25 or the lower limit switch 26 to generate an electric control signal.

[0036] In one embodiment, a connecting hole 28 is provided at the center of the upper gear 21 , and the power mechanism is connected to the connecting hole 28 via the transmission shaft 7 to drive the upper gear 21 to rotate.

[0037] In one embodiment, the power mechanism is a reduction box 8 , the input shaft of the reduction box 8 is connected to the drive motor 81 , and the output shaft of the reduction box 8 is connected to the transmission shaft 7 .

[0038] In one embodiment, the transmission shaft 7 is horizontally arranged on the top of the lifting inner cabinet 5, and its two ends are respectively connected to the lifting mechanism. When the transmission shaft 7 rotates, the lifting mechanism is synchronously driven to move.

[0039] Working Principle: When the user issues a lift command, the power mechanism begins operating. The drive motor's output shaft is connected to the input shaft of the reduction gearbox. The reduction gearbox converts the high-speed, low-torque output of the drive motor into low-speed, high-torque motion, meeting the needs of the lifting mechanism. The reduction gearbox's output shaft is connected to the drive shaft, ensuring stable power transmission to the drive shaft.

[0040] The drive shaft is arranged horizontally at the top of the lift cabinet, its ends connected to the upper gears in the left and right lifting mechanisms. When the drive shaft rotates, driven by the reduction gearbox, the upper gears on both sides rotate simultaneously. Because the upper gears mesh with the chain, the rotation of the gears drives the slider up and down along the vertical guide rails through the chain.

[0041] This design ensures that the left and right lifting mechanisms of the inner cabinet can operate synchronously through the same drive shaft, ensuring that the inner cabinet remains balanced during the lifting process, without tilting or left-right misalignment, thus preventing jamming. In addition, this synchronous lifting design greatly improves the stability and safety of the system, especially when carrying heavy objects, and can still maintain a smooth lifting process.

[0042] The gear-chain mechanism plays a crucial role in this utility model. The upper gear is connected to the power mechanism and driven by a transmission shaft. When the upper gear rotates, the meshing chain begins to move along a predetermined path. The other end of the chain meshes with the lower gear, forming a closed transmission loop. The chain is fixedly connected to the slider via a clamping seat, and the slider is mounted within a vertical guide rail.

[0043] As the chain moves, the slider moves vertically along the guide rail. Because the chain drive has excellent rigidity and can maintain stable transmission even under heavy loads, the slider's movement is very smooth, which directly translates into smooth lifting and lowering of the inner cabinet. The gear chain mechanism avoids the slippage, loosening, and asynchronism that can occur during the lifting process of traditional wire winches.

[0044] To ensure the inner cabinet's lifting and lowering motion remains within a safe range, the present invention incorporates upper and lower limit switches within the base. When a slider, connected to the clamping base via a chain, moves to the preset upper or lower limit position, a contact block on the slider contacts the corresponding limit switch. These limit switches control the operation of the power mechanism by sending electrical control signals. When a limit switch is contacted, the power mechanism immediately stops, preventing the inner cabinet from exceeding the safe range.

[0045] This design significantly enhances the safety of the entire system, preventing mechanical failures or accidents caused by lifting the cabinet beyond the designed range. Furthermore, this limit protection mechanism eliminates the risk of misoperation during lifting, providing greater peace of mind.

[0046] The gear-chain mechanism not only improves system synchronization and transmission efficiency but also significantly enhances stability. The chain's rigid structure ensures consistent movement even under high loads, eliminating the jitter and jamming common in traditional lifting mechanisms. Furthermore, the material selection and design of the chain and gears ensure their durability over long-term use, reducing the need for frequent maintenance due to wear.

[0047] The simple and easy-to-manufacture gear and chain structure makes routine maintenance very easy. When maintenance is needed, simply adjust the chain tension or replace worn gears. Compared to complex wire winches, gear and chain mechanisms offer a longer service life and lower maintenance costs.

[0048] To sum up, the present invention not only simplifies the existing complex design in structure, but also makes the operation of the lifting cabinet more stable, safe and durable through precise mechanical transmission and effective limit protection, greatly improving the user experience and the market competitiveness of the product.

[0049] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.

Claims

1. A lifting mechanism for a lifting cabinet, characterized by: It comprises a base (2) fixed on a side panel (1) of a cabinet body, a vertical guide rail (3) installed in the base (2), a slider (4) slidably installed in the vertical guide rail (3), the slider (4) being connected to a lifting inner cabinet (5), and the lifting inner cabinet (5) performs lifting motion along the bottom of the cabinet body under the guiding support of the vertical guide rail (3) and the slider (4); An upper gear (21) and a lower gear (22) are also installed in the base (2). The upper and lower gears are connected by a chain (23). The upper gear (21) is connected to a power mechanism and is driven to rotate by the power mechanism. The chain (23) is connected to the slider (4) through a clamping seat (24). When the chain (23) moves, the slider (4) is driven to move through the clamping seat (24), thereby driving the lifting inner cabinet (5) to move up and down.

2. The lifting mechanism for a lift cabinet according to claim 1, characterized in that: The surface of the base (2) is also covered with a cover (6), and a receiving area is formed between the cover (6) and the base (2), and the vertical guide rail (3), the slider (4), the upper gear (21) and the lower gear (22) are covered in the receiving area.

3. The lifting mechanism for a lifting cabinet according to claim 2, characterized in that: A guide groove (61) is vertically provided on the surface cover (6), and a guide area (41) is extended outward from the slider (4). The guide area (41) extends out of the surface cover (6) through the guide groove (61) and is connected to the lifting inner cabinet (5).

4. The lifting mechanism for a lift cabinet according to claim 1, characterized in that: The base (2) is further provided with an upper limit switch (25) and a lower limit switch (26). Correspondingly, a touch block (27) is provided on the clamping seat (24) to contact the upper limit switch (25) or the lower limit switch (26) to generate an electric control signal.

5. The lifting mechanism for a lift cabinet according to claim 1, characterized in that: A connecting hole (28) is provided at the center of the upper gear (21), and the power mechanism is connected to the connecting hole (28) via a transmission shaft (7) and drives the upper gear (21) to rotate.

6. The lifting mechanism for a lifting cabinet according to claim 5, characterized in that: The power mechanism is a reduction box (8), the input shaft of the reduction box (8) is connected to the drive motor (81), and the output shaft of the reduction box (8) is connected to the transmission shaft (7).

7. The lifting mechanism for a lift cabinet according to claim 6, characterized in that: The transmission shaft (7) is horizontally arranged on the top of the lifting inner cabinet (5), and its two ends are respectively connected to the lifting mechanism. When the transmission shaft (7) rotates, it synchronously drives the lifting mechanism to move.

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