Goods shelf with anti-toppling function

Abstract

The utility model provides a kind of goods shelf with anti-toppling function, including goods shelf body and the base of mobile wheel being equipped with bottom and can be moved on ground, goods shelf body is installed on base;The bottom of base is equipped with multiple auxiliary wheels that can be telescopic along the width direction of goods shelf body;The bottom of base is also equipped with transmission mechanism, the input shaft of transmission mechanism extends along goods shelf body length direction, two output ends of transmission mechanism are respectively connected with the transmission of two auxiliary wheels of a group of auxiliary wheel groups, each group of auxiliary wheel groups is equipped with corresponding transmission mechanism and is connected, and the input shaft connected with all transmission mechanisms is coaxially fixed connection.The utility model sets up multiple auxiliary wheels that can be synchronous telescopic in base bottom, increase multiple support points to prevent toppling, realize the synchronous unfolding and retraction of all auxiliary wheels by the linkage of transmission mechanism, solve the low efficiency problem caused by the need of individual operation to strengthen stable structure in prior art, while giving consideration to anti-toppling function and operation convenience.

Description

Technical Field

[0001] This utility model belongs to the field of shelving, specifically relating to a shelving unit with anti-tipping function. Background Technology

[0002] With the rapid development of the warehousing and logistics industry, mobile shelving has been widely used in warehouses, supermarkets, libraries and other scenarios due to its flexibility and high space utilization. However, because shelving usually needs to support stacked goods at a height, the center of gravity is relatively high. During movement, it may tip over due to instability of the center of gravity (such as external impact, sudden stop and start, or uneven ground), causing damage to goods or even personal injury.

[0003] For example, CN202221945272.5 discloses an anti-tipping rack with improved support strength. Both sides of the rack's support legs are equipped with structures to enhance stability. These structures can be extended outwards when movement is needed, adding four support points to prevent tipping during movement. However, the four support points have independently designed reinforcement structures, requiring manual operation of each one, which is cumbersome and inefficient in practical use. Utility Model Content

[0004] To address the technical problems existing in the prior art, this utility model provides a shelf with an anti-tipping function, which can more quickly deploy the support mechanism and increase multiple support points.

[0005] In this embodiment of the invention, the shelf with anti-tipping function includes a shelf body and a base with casters at the bottom that allows it to move on the ground. The shelf body is mounted on the base. Multiple auxiliary wheels that can extend and retract along the width of the shelf body are installed at the bottom of the base. When the auxiliary wheels retract, they are completely housed at the bottom of the base; when they extend, they unfold outwards and contact the ground. The multiple auxiliary wheels include at least two sets of auxiliary wheels spaced apart along the length of the shelf body. Each set of auxiliary wheels has two auxiliary wheels that can extend and retract to the left and right sides respectively along the width of the shelf body. A transmission mechanism with one input shaft and two output ends is also installed at the bottom of the base. The input shaft of the transmission mechanism extends along the length of the shelf body, and the two output ends of the transmission mechanism are respectively connected to the two auxiliary wheels of one set of auxiliary wheels. Each set of auxiliary wheels has a corresponding transmission mechanism connected to it. The input shaft connected to all transmission mechanisms is coaxially fixed. By rotating the input shaft, all auxiliary wheels can simultaneously extend outwards or retract inwards under the transmission action of all transmission mechanisms.

[0006] Compared with the prior art, the beneficial effects of the superior technical solution of this utility model include:

[0007] 1. This utility model has multiple synchronously retractable auxiliary wheels at the bottom of the base. Through the linkage of the transmission mechanism, all auxiliary wheels can be extended and retracted synchronously. This can not only form a larger support surface when the shelf is moved to effectively prevent the shelf from tipping over, but also completely retract into the base when the shelf is fixed to ensure space utilization. This solves the problem of low efficiency caused by the need to operate each one individually to strengthen the stabilizing structure in the existing technology, while taking into account both anti-tipping function and ease of operation.

[0008] 2. The transmission mechanism adopts a gearbox and rack combination, and power transmission is achieved through an even number of meshing gear sets. It features a compact structure, smooth transmission, and reliable operation. At the same time, by reducing the height of the gearbox, the height of the base is reduced, thereby lowering the center of gravity of the shelf.

[0009] 3. A double pendulum counterweight structure is added to the center of the bottom of the base. Through the symmetrical linkage of the double pendulums, the inertia of the pendulums generates a restoring torque in real time that is opposite to the tilt direction of the rack. Together with the auxiliary wheel system, it forms a double anti-tipping protection, which significantly improves the rack's anti-tipping ability under complex working conditions. Attached Figure Description

[0010] Figure 1 This is a side view of the anti-tipping shelf structure of the embodiment. Figure 1 The auxiliary wheel is in the extended position.

[0011] Figure 2 This is a side view of the anti-tipping shelf structure of the embodiment. Figure 2 The auxiliary wheel is in the retracted state.

[0012] Figure 3 This is a schematic diagram of the connection between the double pendulum counterweight structure and the base in the embodiment.

[0013] The reference numerals in the accompanying drawings include: shelf body 10, base 20, caster 21, auxiliary caster 22, slide rail 23, support rod 24, transmission mechanism 25, rack 251, gearbox 252, first gear 2521, second gear 2522, double pendulum counterweight structure 30, connecting rod 31, pendulum 32, universal bearing seat 33, and rubber pad 34. Detailed Implementation

[0014] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0015] This embodiment provides a shelf with anti-tipping function, such as Figure 1 and Figure 2 As shown, in a preferred embodiment, the shelf includes a shelf body 10 and a base 20 with casters 21 at the bottom, enabling it to move on the ground. The shelf body 10 is mounted on the base 20, making it a mobile shelf. The casters 21 are swivel casters with a locking function, allowing it to be fixed in one position. The bottom of the base 20 is equipped with multiple auxiliary wheels 22 that can extend and retract along the width direction of the shelf body 10 (which is also the width direction of the base 20). The auxiliary wheels 22 are swivel casters; when retracted, they are completely stored at the bottom of the base 20; when extended, they unfold outwards and contact the ground, providing a support point.

[0016] Among them, the multiple auxiliary wheels 22 include at least two sets of auxiliary wheels arranged at intervals along the length direction of the shelf body 10. Each set of auxiliary wheels is provided with two auxiliary wheels 22 that can extend and retract to the left and right sides respectively along the width direction of the shelf body 10. For example, a set of auxiliary wheels is set at each end of the length direction of the shelf body 10, for a total of four auxiliary wheels 22, adding four support points.

[0017] The bottom of the base 20 is also equipped with a transmission mechanism 25 having one input shaft and two output ends. The input shaft of the transmission mechanism 25 extends along the length of the shelf body 10. The two output ends of the transmission mechanism 25 are respectively connected to two auxiliary wheels 22 of a set of auxiliary wheels. Each set of auxiliary wheels has a corresponding transmission mechanism 25 connected to it. The input shaft connected to all the transmission mechanisms 25 is coaxially fixed to connect all the transmission mechanisms 25. Thus, by rotating the input shaft, all the auxiliary wheels 22 can extend outward or retract inward synchronously under the transmission action of all the transmission mechanisms 25.

[0018] This invention features four synchronously retractable auxiliary wheels 22 at the bottom of the base 20. The transmission mechanism 25 enables coordinated control of all auxiliary wheels 22. When the shelf needs to be moved, simply rotating one input shaft drives all four auxiliary wheels 22 to extend outwards synchronously, forming an extended support surface and preventing the shelf from tipping over during movement (e.g., due to tilting, collision, or eccentric load). Once the shelf is fixed, the auxiliary wheels 22 retract synchronously into the base 20, maintaining a compact layout and facilitating the side-by-side placement of multiple shelves. This solution not only improves the stability of shelf movement but also simplifies the operation process (by rotating the input shaft) with a one-button synchronous operation, solving the cumbersome operation problem caused by the need to adjust each stability-enhancing structure individually in the prior art.

[0019] In a preferred embodiment of this utility model, the bottom of the base 20 is provided with a slide rail 23 extending along its width direction. For example, the slide rail 23 is fixed to the bottom of the base 20 by bolts. A support rod 24 is slidably connected to the slide rail 23. For example, a slider is fixed to the upper end of the support rod 24. The support rod 24 is slidably connected to the slide rail 23 through the slider. An auxiliary wheel 22 is installed at the end of the support rod 24. The two output ends of the transmission mechanism 25 are respectively connected to the two support rods 24 of a set of auxiliary wheels.

[0020] By rotating the input shaft in the forward direction to drive multiple transmission mechanisms 25 in tandem, the two support rods 24 of each auxiliary wheel set move precisely and synchronously along the slide rail 23. The support rods 24 drive the auxiliary wheels 22 to achieve smooth extension or retraction. The guide structure formed by the slide rail 23 and the support rods 24 ensures the smooth and stable extension and retraction of the auxiliary wheels 22, realizing the synchronous movement of multiple auxiliary wheels 22.

[0021] More preferably, when the auxiliary wheel 22 extends outward to serve as a support point, it contacts the ground; when the auxiliary wheel 22 is retracted to the bottom of the base 20, it is suspended and does not contact the ground. When the auxiliary wheel 22 extends outward from the bottom of the base 20, it moves obliquely downward from the inside to the outside; when the auxiliary wheel 22 retracts back to the bottom of the base 20 from the outside, it moves obliquely upward from the outside to the inside. Specifically, the slide rail 23 can be tilted downward from the inside to the outside at a certain angle, such as 1°, so that when the auxiliary wheel 22 extends, it moves obliquely downward until it contacts the ground to form a support point, and when it retracts, it completely detaches from the ground and is retracted to the bottom of the base 20 in an obliquely upward direction. This ensures that the auxiliary wheel 22 does not rub against the ground throughout the entire extension and retraction process, greatly reducing operating resistance and saving effort.

[0022] like Figure 1 and Figure 2 As shown, in this utility model, the transmission mechanism 25 includes two racks 251 and a gearbox 252 composed of a plurality of gears arranged in sequence and meshing with each other. The input shaft is coaxially fixed to one of the gears in the gearbox 252. The two racks 251 are respectively fixed to two support rods 24 of a set of auxiliary wheels and are arranged parallel to the corresponding slide rails 23. The gearbox 252 includes a housing (not shown in the figure) fixed to the bottom of the base 20. Two first gears 2521 that mesh with the two racks 251 are rotatably installed in the housing, and an even number of second gears 2522 located between the two first gears 2521 and meshing with each other. Therefore, the number of gears in the entire row that mesh with each other is also an even number. When the input shaft rotates, the even-numbered reverse transmission of the gearbox 252 causes the two first gears 2521 to rotate in opposite directions, driving the two racks 251 to move towards or away from each other, thereby causing the two support rods 24 of a set of auxiliary wheels to extend and retract synchronously along the slide rail 23, realizing the extension and retraction of the auxiliary wheel 22.

[0023] Specifically, eight second gears 2522 with identical structural dimensions can be configured. The diameter of each second gear 2522 is smaller than that of the first gear 2521, and its upper surface is lower than the lower surface of the rack 251. This ensures normal meshing and transmission between the gears while avoiding interference with the rack 251. This compact gear layout effectively reduces the overall height of the gearbox 252 and the ground clearance of the base 20, thereby lowering the center of gravity of the rack and improving its anti-tipping performance.

[0024] In this invention, all input shafts are driven to rotate by the same drive unit (not shown in the figure). The drive unit can be a motor or a handle. The drive unit drives all input shafts to rotate synchronously, achieving efficient and convenient operation. When the drive unit is a motor, it is installed on the bottom side of the base 20 in a convenient maintenance position. The motor's output shaft is directly coaxially connected to the outermost input shaft and is powered by a rechargeable battery. When the drive unit is a handle, a threaded sleeve is fixed to the end of the base 20. The outermost input shaft extends along the length of the base 20 to the end of the base 20 and is threadedly connected to the threaded sleeve, forming a threaded engagement and achieving a reliable self-locking function. The handle is fixed to the input shaft and located in a convenient operating position. When the handle is rotated, although the input shaft will experience axial displacement (e.g., 2-3 mm) under the action of the thread, it does not affect the normal meshing of the gears in the gearbox 252.

[0025] In another preferred embodiment, a support seat (not shown in the figure) is fixedly connected to the bottom of the base 20, and the input shaft is rotatably connected to the support seat via a rotary bearing. The support seat and rotary bearing not only ensure the stability and smoothness of the input shaft during rotation, but also distribute the working load of the transmission system, thereby improving the durability and reliability of the transmission mechanism 25.

[0026] like Figure 3 As shown, in another preferred embodiment, a double pendulum counterweight structure 30 is provided at the center of the bottom of the base 20. The double pendulum 32 configuration structure includes a connecting rod 31 connected to the bottom of the base 20, and two symmetrical pendulums 32 respectively installed at both ends of the connecting rod 31. A universal bearing seat 33 is installed at the center of the bottom of the base 20, and the middle part of the connecting rod 31 is connected to the center of the bottom of the shelf through the universal bearing seat 33. The two pendulums 32 are fixed (welded or bolted) to both ends of the connecting rod 31, or a rotating hinge is provided at each end of the connecting rod 31, and the pendulums 32 are suspended from the ends of the connecting rod 31 through the rotating hinge.

[0027] This technical solution uses a universal bearing seat 33 to connect the connecting rod 31 to the shelf, ensuring the degree of freedom of swing. The pendulum 32 can be installed in two ways: rigid connection or hinged suspension. The former is simple and reliable, while the latter is suitable for uneven ground. This solution uses the symmetrical linkage of the two pendulums 32 to dynamically counteract the overturning moment by utilizing the gravity of the pendulums 32. When the shelf moves, it generates a restoring moment in real time that is opposite to the tilt direction, effectively preventing tipping accidents. For example, if the shelf is subjected to lateral force (such as turning or collision) during movement, the inertial lag of the pendulum 32 will immediately generate a stabilizing force to suppress swaying.

[0028] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A shelving unit with anti-tipping function, comprising a shelving body and a base with casters at the bottom for movement on the ground, the shelving body being mounted on the base; characterized in that, The base is equipped with multiple auxiliary wheels that can extend and retract along the width of the shelf body. When the auxiliary wheels are retracted, they can be completely stored at the bottom of the base. When the auxiliary wheels are extended, they can unfold outwards and contact the ground. Multiple auxiliary wheels include at least two sets of auxiliary wheels spaced apart along the length of the rack body, each set of auxiliary wheels having two auxiliary wheels that can extend and retract to the left and right sides respectively along the width of the rack body; The bottom of the base is also equipped with a transmission mechanism having one input shaft and two output ends. The input shaft of the transmission mechanism extends along the length of the shelf body. The two output ends of the transmission mechanism are respectively connected to the two auxiliary wheels of a set of auxiliary wheels. Each set of auxiliary wheels is provided with a corresponding transmission mechanism connected to it. The input shaft connected to all the transmission mechanisms is coaxially fixed. By rotating the input shaft, all auxiliary wheels can extend outward or retract inward synchronously under the transmission action of all transmission mechanisms.

2. The shelving unit with anti-tipping function according to claim 1, characterized in that, The base has a slide rail extending along its width at its bottom, and a support rod is slidably connected to the slide rail. The auxiliary wheel is installed at the end of the support rod, and the two output ends of the transmission mechanism are respectively connected to the two support rods of a set of auxiliary wheels.

3. The shelving unit with anti-tipping function according to claim 2, characterized in that, The transmission mechanism includes two racks and a gearbox consisting of a plurality of gears arranged in sequence and meshing with each other. The input shaft is coaxially fixed to one of the gears. The two racks are respectively fixed to two support rods of a set of auxiliary wheels and are arranged parallel to the corresponding slide rails. The gearbox includes a housing fixed to the bottom of the base. Two first gears that mesh with the two racks are rotatably installed in the housing, and an even number of second gears located between the two first gears and meshing with each other.

4. The shelving unit with anti-tipping function according to claim 1, characterized in that, All the input shafts are driven to rotate by the same drive unit, which is either a motor or a handle.

5. The shelving unit with anti-tipping function according to claim 4, characterized in that, When the driving component is a handle, a threaded sleeve is fixedly connected to the end of the base, and the outermost input shaft extends along the length direction of the base to the end of the base and is threadedly connected to the threaded sleeve. The handle is located outside the threaded sleeve and is fixedly connected to the input shaft.

6. The shelving unit with anti-tipping function according to any one of claims 1-5, characterized in that, The base is fixedly connected to a support seat at its bottom, and the input shaft is rotatably connected to the support seat through a rotating bearing.

7. The shelving unit with anti-tipping function according to any one of claims 1-5, characterized in that, When the auxiliary wheel is retracted into the bottom of the base, the auxiliary wheel is suspended in the air and does not contact the ground; When the auxiliary wheel extends outward from the bottom of the base, the auxiliary wheel moves obliquely downward from the inside to the outside; When the auxiliary wheel retracts from the outside to the bottom of the base, the auxiliary wheel moves obliquely upward from the outside to the inside.

8. The shelving unit with anti-tipping function according to any one of claims 1-5, characterized in that, The base has a double pendulum counterweight structure at the bottom center. The double pendulum counterweight structure includes a connecting rod connected to the bottom of the base and two symmetrical pendulums installed at both ends of the connecting rod. A universal bearing seat is installed at the center of the bottom of the base, and the middle part of the connecting rod is connected to the bottom of the shelf through the universal bearing seat; Two pendulums are fixed to both ends of a connecting rod, or a rotating hinge is provided at each end of the connecting rod, and the pendulums are suspended from the ends of the connecting rod through the rotating hinges.

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