Telescopic lifting device

Abstract

The present application relates to the field of automation lifting technology, and specifically relates to a telescopic lifting device. The device comprises a plurality of lifting units and a motor. Each lifting unit comprises a main rack, a secondary rack, a gear and a sliding block. The main rack and the secondary rack are engaged with the gear and have opposite movement trends. The sliding block is pivotally connected to the center of the gear, and the motor is used to drive the gear. The secondary rack of the previous stage is fixed to the sliding block of the next stage, and the main rack of the next stage is fixed to the sliding block of the previous stage. The main rack of the primary stage and the secondary rack of the last stage are displaced relative to each other to complete the lifting action. The present application has a novel structure and is suitable for use in a mechanical arm lifting device for an automated kitchen.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic lifting, and in particular to a telescopic lifting device. Background Art

[0002] With the widespread use of mechanical automation, automated equipment is being applied to multiple technical fields. In the field of kitchen equipment automation, lifting devices are often required. Since the equipment needs to be used in the food processing area, the lifting devices used in this field cannot use pneumatic and hydraulic forms. There are mainly the following types of lifting device structures on the market:

[0003] 1. The lifting function is achieved by using a nylon bag + winch structure, with a nested metal shell protecting the internal structure during extension. This device is susceptible to positional errors when subjected to upward force from below. Furthermore, due to the inherent characteristics of the winch, its bottom travel is not linearly related to the motor's rotation angle. Therefore, this device cannot accurately control displacement.

[0004] 2. Using a single screw and multiple intersecting twisted rods to achieve the lifting function. This device is sensitive to lateral forces, and the relationship between the screw's movement angle and the bottom stroke is not linear. Therefore, this device cannot accurately control the displacement.

[0005] 3. Using multiple layers of nested screws to achieve the lifting function. This device is also sensitive to lateral forces and cannot achieve more precise displacement control.

[0006] Therefore, it is imperative to develop a robotic arm lifting device for automated kitchens. Summary of the Invention

[0007] In response to at least one of the above technical problems, the present invention aims to provide a lifting device that can accurately control lifting displacement;

[0008] In order to achieve this object, the present invention provides a telescopic lifting device, which adopts the following technical solutions:

[0009] Telescopic lifting device, comprising:

[0010] Multi-stage lifting unit and motor;

[0011] Each level of the lifting unit includes a main rack, a secondary rack, a gear and a slider;

[0012] The main rack and the auxiliary rack are engaged with the gear and have opposite movement tendencies, the slider is pivotally connected to the center of the gear, and the motor is used to drive the gear;

[0013] The auxiliary rack of the previous stage is fixed to the slider of the next stage, and the main rack of the next stage is fixed to the slider of the previous stage;

[0014] The primary main rack and the final auxiliary rack produce relative displacement to complete the lifting action.

[0015] In some embodiments, a connecting rod is provided between the slider and the gear;

[0016] One end of the connecting rod is fixed to the slider, and the other end is pivotally connected to the center of the gear so that a distance equal to the length of the connecting rod exists between the slider and the gear.

[0017] In some embodiments, further comprising a housing;

[0018] The housing is composed of a plurality of splicing plates that can slide relative to each other;

[0019] The primary main rack and the final auxiliary rack are respectively fixed to different splicing plates.

[0020] In some embodiments, the housing is a rectangular box structure with two bottom surfaces missing;

[0021] Each of the splicing plates is provided with a dovetail groove, and another splicing plate connected to the splicing plate is provided with a protruding structure adapted to the dovetail groove so that the two splicing plates can slide relative to each other.

[0022] In some embodiments, each level of the slider is correspondingly provided with a slide rail;

[0023] The slide rails are arranged on the inner wall of the shell and are respectively located on different splicing plates.

[0024] In some embodiments, the multiple levels of lifting units are evenly distributed in the same plane, and the slide rails included in two adjacent levels of the lifting units are located on opposite sides of the shell.

[0025] In some embodiments, a mounting plate is provided between the slider and the slide rail;

[0026] The sliding block is detachably mounted on the mounting plate, and the mounting plate is adapted to the slide rail via a pulley and is slidably connected to the slide rail.

[0027] In some embodiments, the motor is a screw motor, comprising a screw rod and a moving block;

[0028] The motor is mounted on the outside of the housing, and the housing corresponding to the primary lifting unit is provided with a corresponding strip-shaped slot to connect the moving block with the slider.

[0029] In some embodiments, an external baffle is provided on the periphery of the shell to form an integral external structure;

[0030] At least a portion of the outer baffle is an accordion panel.

[0031] On the other hand, the present invention also provides a modified telescopic lifting device, comprising:

[0032] A housing and a lifting unit and a motor arranged inside the housing;

[0033] The lifting unit includes a main rack, a secondary rack and a gear;

[0034] The main rack and the auxiliary rack are meshed with the gear and have opposite movement tendencies, and the motor is used to drive the gear;

[0035] The housing is composed of at least two relatively slidable splicing parts, and the main rack and the auxiliary rack are each fixed to one of the splicing parts;

[0036] The relative displacement between the main rack and the auxiliary rack drives the different splicing parts to form relative displacement to complete the lifting action.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. The present invention provides a telescopic lifting device, which includes a multi-stage lifting unit and a motor. The multi-stage lifting units are linked to each other, and can achieve a travel of 2-3 times its own height at a relatively low overall height, meeting the maximum height restrictions on equipment and products in automated kitchens.

[0039] 2. The telescopic lifting device provided by this invention utilizes a multi-stage rack-and-pinion transmission. The servo motor's rotation angle is linearly related to the extension length, facilitating precise control of the device's extension length. Furthermore, the rack-and-pinion transmissions within the device are independent of each other, allowing the entire device to be disassembled step by step, starting with the final stage without affecting the functionality of the preceding stages, simplifying maintenance.

[0040] 3. The telescopic lifting device provided by the present invention has a slider and a gear connected by a connecting rod, which is not only easy to install and has a stable connection, but also further expands the lifting stroke. The slider can also be adaptively provided with a slide rail to improve sliding stability.

[0041] 4. The telescopic lifting device provided by the present invention has a shell composed of a number of splicing plates that can slide relative to each other. Through the connection form of the dovetail groove structure, it can not only meet the lifting function, but also improve the lifting stability and have excellent performance.

[0042] 5. The telescopic lifting device provided by the present invention has a baffle provided on the outside of its shell and at least a part of the external baffle is an accordion plate, which can protect the interior of the device from the influence of oil stains in the smart kitchen.

[0043] In summary, the present invention has an ingenious design and novel structure, and provides a robotic arm lifting device for an automated kitchen, which has very significant promotional significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0045] Figure 1 This is a schematic diagram of the overall structure of a telescopic lifting device of the present invention;

[0046] Figure 2 yes Figure 1 Another perspective diagram of the overall structure of the telescopic lifting device;

[0047] Figure 3 yes Figure 1 Schematic diagram of the structure of the multi-stage lifting unit in the telescopic lifting device after extension;

[0048] Figure 4 It is a schematic diagram of the overall structure of the multi-stage lifting unit;

[0049] Figure 5 It is a top view of the structure connected to the motor;

[0050] Figure 6 Schematic diagram of the overall structure of the shell;

[0051] Figure 7 It is a schematic diagram of the splicing plate structure;

[0052] Figure 8 It is a schematic diagram of the overall structure of a single lifting unit.

[0053] Description of Figure Numbers:

[0054] Main rack 101, auxiliary rack 102, gear 103, slider 104, connecting rod 105, slide rail 106, mounting plate 107;

[0055] Motor 200, moving block 201;

[0056] Shell 300, splicing plate 301, dovetail groove 311, protruding structure 312, strip slot 302;

[0057] External baffle 400, accordion board 401. DETAILED DESCRIPTION

[0058] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive work.

[0059] To simplify the drawings, only portions relevant to the invention are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0060] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0061] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0062] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0063] See also Figures 1 to 8, a specific embodiment of a telescopic lifting device provided by the present invention is specifically described, including a multi-stage lifting unit and a motor 200, wherein the lifting unit of each stage includes a main rack 101, a secondary rack 102, a gear 103 and a slider 104, the main rack 101 and the secondary rack 102 are meshed with the gear 103 and have opposite movement trends, that is, the main rack 101 and the secondary rack 102 are located on both sides of the center of the gear 103, when the gear 103 rotates, the main rack 101 and the secondary rack 102 on both sides can be driven at the same time, it can be known that the main rack 101 and the secondary rack 102 are preferably set to be parallel, which can greatly improve the operating stroke of the gear 103 and have a smaller overall volume, the slider 104 is pivoted to the center of the gear 103, and when the gear 103 rotates, the slider 104 can move with the gear 103. The motor 200 is used to drive the gear 103. There are two basic ways to drive the gear 103. One is that the motor 200 acts directly on the gear 103, drives the gear 103 to move on the rack, and further drives the slider 104 to move. The other is that the motor 200 can act on the slider 104, pushes the slider 104 to move and further drives the gear 103, which has the same technical effect. It is worth noting that in this embodiment, a multi-stage lifting unit is provided. The auxiliary rack 102 of the previous stage is fixed to the slider 104 of the next stage, and the main rack 101 of the next stage is fixed to the slider 104 of the previous stage. The lifting action is completed by generating relative displacement between the primary main rack 101 and the final auxiliary rack 102.

[0064] When the telescopic lifting device provided in this embodiment is in use, the position of the main rack 101 of the primary lifting unit is fixed at one place, and the slider 104 in the primary lifting unit is pushed to move by the motor 200. The primary slider 104 further drives the gear 103 in the primary lifting unit to move. Since the gear 103 is engaged with the main rack 101 and the auxiliary rack 102, the gear 103 also rotates at the same time, and further drives the auxiliary rack 102 to move. The main rack 101 of the subsequent lifting unit is fixed on the slider 104 of the previous lifting unit, and the auxiliary rack 102 of the previous level is fixed to the slider 104 of the subsequent level. It can be seen that the main rack 101 and the slider 104 of the subsequent level also start to move under the drive of the slider 104 and the auxiliary rack 102 of the previous level, and further drive the gear 103 and the auxiliary rack 102 of the subsequent level lifting unit to move, thereby completing the lifting action. Fixing the mechanical equipment that needs to be lifted and lowered on the auxiliary rack 102 of the final level can be applied to different usage scenarios.

[0065] In addition, the telescopic lifting device provided in this embodiment also has a technical effect in terms of telescopic travel. The specific principle is as follows:

[0066] Since the position of the primary main rack 101 is fixed, the speed of the primary main rack 101 is always 0;

[0067] Assume that the moving speed of the primary slider 104 is v;

[0068] Then the moving speed of the center of the primary gear 103 is also v;

[0069] The linear velocity of gear 103 is calculated according to the formula:

[0070] V = speed of the center of gear 103 × radius;

[0071] It can be obtained that the linear velocity of the primary gear 103 is V; that is,

[0072] If the position of the primary main rack 101 is not fixed, the speed converted to the primary main rack 101 and the auxiliary rack 102 is V;

[0073] Since the position of the primary main rack 101 is fixed and the speed is 0;

[0074] Then, the primary auxiliary rack 102 is driven by the primary gear 103 and its speed is converted to 2V;

[0075] According to the structure of the lifting device provided in this embodiment, the main rack 101 of the next stage is fixed to the slider 104 of the previous stage, and it can be concluded that:

[0076] The moving speed of the second-stage main rack 101 is V;

[0077] According to the auxiliary rack 102 of the previous stage being fixed to the slider 104 of the next stage, it can be concluded that:

[0078] The moving speed of the second-stage slider 104 is 2V;

[0079] The moving speed of the second stage gear 103 is 2V;

[0080] Therefore, the relative movement speed between the second-stage gear 103 and the second-stage main rack 101 is V;

[0081] By considering the second-stage main rack 101 as relatively stationary and continuing the deduction, we can conclude that:

[0082] The moving speed of the second-stage auxiliary rack 102 is:

[0083] The speed V of the second-stage main rack 101 plus the speed 2V of the second-stage gear 103 is 3V in total;

[0084] The speeds of the auxiliary racks 102 of the third, fourth, ..., Nth stages can be derived according to the same derivation process as above to obtain 4V, 5V, ..., (N+1)V;

[0085] According to the above derivation process, it can be known that in this embodiment, as the number of lifting units increases, the moving speed of the auxiliary rack 102 of each stage increases linearly, which has two technical effects. First, a larger moving stroke of the auxiliary rack 102 of the final stage can be obtained under a smaller moving stroke of the primary lifting unit, that is,

[0086] In the same time t,

[0087] The primary auxiliary rack 102 moves a distance S1 = 2Vt;

[0088] The moving distance of the auxiliary rack 102 of the second stage is S2 = 3Vt.

[0089] On the other hand, during the movement of the device, for a certain gear 103 and the meshing rack, the input rack can be considered relatively stationary, and the corresponding movement of the output rack can be calculated based on the movement of the gear 103. This achieves the technical effect of precise travel control based on the actual application scenario by achieving a linear relationship between the rotation angle and extension length of the servo motor 200.

[0090] In some embodiments, as a further preference, a connecting rod 105 is provided between the slider 104 and the gear 103, and the slider 104 and the gear 103 are connected by the connecting rod 105. One end of the connecting rod 105 is fixed to the slider 104, and the other end is pivoted to the center of the gear 103 so that there is a spacing of the length of the connecting rod 105 between the slider 104 and the gear 103. The setting of the connecting rod 105 can, on the one hand, be more easily adapted to the different shapes of the slider 104 and the gear 103, making the installation process simpler. On the other hand, it can also improve the connection stability of the connection at both ends. For example, in this preferred embodiment, the connecting rod 105 can be preferably set to a U-shaped rod, which has better structural strength and is also convenient for installation and connection with the center axis of the gear 103.

[0091] In some embodiments, as a further preference, a shell 300 of a lifting unit is provided in the present invention as a protective structure for the internal lifting unit. The shell 300 is composed of a plurality of splicing plates 301 that can slide relative to each other. The primary main rack 101 and the final auxiliary rack 102 are respectively fixed to different splicing plates 301. It should also be noted that each level of lifting unit can correspond to different splicing plates 301. This structural setting can protect the internal lifting unit while ensuring that the lifting action can be realized.

[0092] Specifically, in some preferred embodiments, the shell 300 is configured to be a rectangular box structure with two bottom surfaces missing, and each splicing plate 301 is provided with a dovetail groove 311, and the other splicing plate 301 connected to the splicing plate 301 is provided with a protruding structure 312 adapted to the dovetail groove 311 so that the two splicing plates 301 can slide relative to each other, having a good relative sliding effect.

[0093] In some embodiments, each level of the slider 104 may be provided with a corresponding slide rail 106 to stabilize the movement of the slider 104. In an embodiment in which a shell 300 is provided, the slide rail 106 is provided on the inner wall of the shell 300 and is respectively located on different splicing plates 301. As a structural optimization, the multi-level lifting units in this embodiment are evenly distributed in the same plane, and the slide rails 106 included in the two adjacent levels of the lifting units are located on opposite sides of the shell 300, which can greatly reduce the overall space occupancy of the device to adapt to more scenarios. Furthermore, a mounting plate 107 may be provided between the slider 104 and the slide rail 106; the slider 104 is detachably mounted on the mounting plate 107, and the mounting plate 107 is adapted to the slide rail 106 through a pulley and is slidably connected to the slide rail 106.

[0094] In some embodiments, the motor 200 described in the present invention is specifically configured as a screw motor 200, including a screw rod and a moving block 201, which is connected to the slider 104 through the moving block 201 and drives the slider 104 to move by rotating the screw. It can be understood that in an embodiment with a shell 300, if the motor 200 is set outside the shell 300, the shell 300 corresponding to the primary lifting unit must also be provided with corresponding strip grooves to connect the moving block 201 with the slider 104. In addition, the screw motor 200 in this embodiment can also be replaced by other ordinary motors 200, all within the protection scope of the present invention.

[0095] In some embodiments, an external baffle 400 is provided on the periphery of the shell 300 to form an integral external structure, so that the motor 200, the multi-stage lifting unit and the shell 300 are all arranged within the external baffle 400. Preferably, at least a portion of the external baffle 400 is an accordion board 401, which can effectively protect the interior of the device from being affected by oil stains in the smart kitchen.

[0096] On the other hand, the present invention also provides another structural form of a telescopic lifting device, comprising:

[0097] A housing 300 and a lifting unit and a motor 200 disposed inside the housing 300;

[0098] The lifting unit includes a main rack 101, a secondary rack 102 and a gear 103;

[0099] The main rack 101 and the auxiliary rack 102 are meshed with the gear 103 and have opposite movement trends. The motor 200 is used to drive the gear 103.

[0100] The housing 300 is composed of at least two relatively slidable joints, and the main rack 101 and the auxiliary rack 102 are each fixed to one of the joints;

[0101] The relative displacement between the main rack 101 and the auxiliary rack 102 drives the different splicing parts to form relative displacement to complete the lifting action.

[0102] The lifting unit in this embodiment is only provided with one level. Compared with the telescopic lifting device provided with multiple levels of lifting units, this embodiment has the structural characteristics of simple system structure, easy installation and small size, and also has significant promotion significance.

[0103] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. Telescopic lifting device, characterized in that: include: Multi-stage lifting unit and motor; Each level of the lifting unit includes a main rack, a secondary rack, a gear and a slider; The main rack and the auxiliary rack are engaged with the gear and have opposite movement tendencies, the slider is pivotally connected to the center of the gear, and the motor is used to drive the gear; The auxiliary rack of the previous stage is fixed to the slider of the next stage, and the main rack of the next stage is fixed to the slider of the previous stage; The primary main rack and the final auxiliary rack produce relative displacement to complete the lifting action; A connecting rod is provided between the slider and the gear; One end of the connecting rod is fixed to the slider, and the other end is pivotally connected to the center of the gear so that there is a distance of the length of the connecting rod between the slider and the gear; Also includes a housing; The housing is composed of a plurality of splicing plates that can slide relative to each other; The primary main rack and the final auxiliary rack are respectively fixed to different splicing plates.

2. The telescopic lifting device according to claim 1, characterized in that: The shell is a rectangular box structure with two bottom surfaces missing; Each of the splicing plates is provided with a dovetail groove, and another splicing plate connected to the splicing plate is provided with a protruding structure adapted to the dovetail groove so that the two splicing plates can slide relative to each other.

3. The telescopic lifting device according to claim 1, characterized in that: Each level of the slider is correspondingly provided with a slide rail; The slide rails are arranged on the inner wall of the shell and are respectively located on different splicing plates.

4. The telescopic lifting device according to claim 3, characterized in that: The multiple levels of lifting units are evenly distributed in the same plane, and the slide rails included in two adjacent levels of lifting units are located on opposite sides of the shell.

5. The telescopic lifting device according to claim 3, characterized in that: A mounting plate is provided between the slider and the slide rail; The sliding block is detachably mounted on the mounting plate, and the mounting plate is adapted to the slide rail via a pulley and is slidably connected to the slide rail.

6. The telescopic lifting device according to any one of claims 1 to 5, characterized in that: The motor is a screw motor, comprising a screw rod and a moving block; The motor is mounted on the outside of the housing, and the housing corresponding to the primary lifting unit is provided with a corresponding strip-shaped slot to connect the moving block with the slider.

7. The telescopic lifting device according to claim 6, characterized in that: An external baffle is provided on the periphery of the shell to form an integral external structure; At least a portion of the outer baffle is an accordion panel.

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