A switch handcart anti-toppling device

Abstract

The present application relates to the technical field of power switch maintenance transfer, in particular to a switch handcart anti-toppling device. The present application provides a switch handcart anti-toppling device, which comprises a handcart body, a hand handle is arranged on the handcart body; an anti-toppling mechanism is arranged around the handcart body, the anti-toppling mechanism comprises a toppling ring arranged on the handcart body and anti-toppling rods uniformly distributed on the toppling ring, the anti-toppling rods are at least three; a counterweight ball is arranged in the toppling ring, the anti-toppling rods drive the toppling ring to move in the direction opposite to the toppling direction of the handcart body, and the counterweight ball moves in the direction opposite to the toppling direction of the handcart body. The present application aims to solve the technical problem that the switch handcart cannot be prevented from toppling in various directions in the prior art.

Description

Technical Field

[0001] This invention relates to the technical field of power switch maintenance and transportation, and in particular to a switch trolley anti-tipping device. Background Technology

[0002] Currently, most high-voltage systems in substations use switchgear cabinets, with open-type cabinets becoming increasingly rare. During switching operations—transferring high-voltage switchgear from cold standby to maintenance or vice versa—it's necessary to pull the switchgear out of or push it into the cabinet. This is generally used for transferring high-voltage switches such as 25kV and 10kV. During power equipment maintenance, when the switchgear is under maintenance, it needs to be stored on a switchgear cabinet for transfer or temporary storage. However, during the movement of the switchgear cabinet, the cabinet itself is tall and slender, with large gaps in the switch compartment cover. The switch itself weighs approximately 100 kg, and the trolley weighs approximately 40 kg. Combined with the protruding contacts, the overall center of gravity is at the upper front of the trolley. If the wheels get stuck during pushing, it can easily cause the switch to tip forward, damaging the switch contacts and even causing personal injury. Currently, after operators transfer the switch body from the switch cabinet to the switch trolley, there are no anti-tipping measures; they rely solely on manual support and the trolley's locking mechanism. This easily leads to equipment and personal injury hazards. Patent CN112706808B discloses an adjustable trolley anti-tipping device to solve the problem of switches easily tipping over during maintenance and transfer, causing equipment damage and personal injury. The technical solution includes a trolley body with a push-pull handle on one side. Two vertical support plates are located on the side wall of the trolley opposite the push-pull handle. Vertical grooves are formed on the opposite end faces of the two support plates. Adjustable support components are installed within these grooves. Each support component includes a movable plate spanning both ends and installed within the two grooves. Two support rods are hinged to the movable plates, with their free ends extending downwards and forwards from the trolley body. A pressing component is located above the support rods on the support plates to press them down from above. However, this patent only prevents unidirectional tilting; lateral tilting remains unavoidable. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device to prevent the tipping of a switch trolley, which aims to solve the technical problem that the prior art cannot prevent the switch trolley from tipping over in all directions.

[0004] To achieve the above objectives, the present invention proposes an anti-tipping device for a handcart, comprising a handcart body with a push handle on the handcart body; an anti-tipping mechanism is circumferentially arranged on the handcart body, the anti-tipping mechanism comprising a tilting ring disposed on the handcart body and anti-tipping rods evenly distributed on the tilting ring, wherein there are at least three anti-tipping rods; a counterweight ball is disposed inside the tilting ring, and the anti-tipping rods drive the tilting ring to move in the opposite direction to the tilting direction of the handcart body, and the counterweight ball moves in the opposite direction to the tilting direction of the handcart body.

[0005] Preferably, the tilting ring is a hollow ring, and the counterweight ball can move within the tilting ring.

[0006] Preferably, the tilting ring is provided with a support rod that extends into the interior of the handcart body; the support rod is connected to a connecting rod that is movably mounted on the adjusting seat.

[0007] Preferably, the adjusting seat is provided with a rocking ball, the rocking ball is connected to the connecting rod, the adjusting seat is provided with a limiting hole, and a positioning groove is provided around the limiting hole.

[0008] Preferably, the anti-tipping bar includes a movable rod, and the anti-tipping bar is provided with a plurality of gears. The movable rod and the gears mesh with each other. The gears are installed in the anti-tipping bar through a rotating shaft, and a torsion spring is also provided on the rotating shaft.

[0009] Preferably, the top of the moving rod is provided with an arc-shaped block, and the arc-shaped block is provided with a plurality of counterweight balls.

[0010] Preferably, the movable rod is provided with a slider, and the anti-tipping rod is provided with a groove for the slider.

[0011] Preferably, the anti-tipping rod is provided with several fixing holes to limit the maximum distance the slider rises.

[0012] Preferably, the bottom of the anti-tipping bar is provided with an arc hook, which can be locked onto the push handle.

[0013] Preferably, a number of ball bearings are provided on the outer side of the anti-tipping bar, and the arc angle formed by the arc hook is 45°~60°.

[0014] Compared with the prior art, the beneficial effects of the anti-tipping device for a switch handcart provided by the present invention are as follows: 1. The anti-tipping bar moves the tipping ring in the opposite direction to the tipping direction of the trolley body, causing the center of gravity to shift in the tipping direction of the trolley, increasing the difficulty of tipping the trolley.

[0015] 2. The tilting ring is equipped with a counterweight ball. When the tilting ring is manually moved in the opposite direction of the trolley tilting, or when the anti-tipping rod of the tilting ring touches the ground, causing the tilting ring to tilt in the opposite direction of the trolley tilting, the counterweight ball will also move in the opposite direction of the trolley tilting, causing the overall center of gravity of the trolley to change, making it more difficult to tilt.

[0016] 3. The positioning groove can hold the connecting rod in place, providing a limit when the trolley tipps over, preventing it from tipping in other directions. The limiting hole limits the maximum tilting angle of the connecting rod, preventing excessive tilting angle from affecting the anti-tipping effect. The rocking ball can also be set to an over-clearance fit, so that when the trolley tipps to one side, the force on the rocking ball can cause the tilting ring 31 to deflect to the other side.

[0017] 4. If you encounter a small bump, continue pushing the cart forward. The ball bearings will contact the bump and create a sliding force, gradually lifting the cart. This is much less effort compared to lifting the cart directly. Because the cart and its load are relatively heavy, it is not suitable for climbing very high steps. The same principle applies if you enter a small pit.

[0018] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a front view structural schematic diagram of a switch truck anti-tipping device according to an embodiment of the present invention.

[0020] Figure 2 This is a top view of the tipping ring structure of an anti-tipping device for a switch truck according to an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the connection between the arc-shaped tipping ring and the adjusting seat of an anti-tipping device for a switch cart according to an embodiment of the present invention.

[0022] Figure 4 This is a cross-sectional structural diagram of the tipping ring of a switch handcart anti-tipping device according to an embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of the clothing structure of the adjustment seat of a switch handcart anti-tipping device according to an embodiment of the present invention.

[0024] Figure 6 This is a schematic diagram of the anti-tipping rod of an anti-tipping device for a switch truck according to an embodiment of the present invention.

[0025] Figure 7 This is an enlarged structural schematic diagram of the arc hook of a switch handcart anti-tipping device according to an embodiment of the present invention.

[0026] in: 1-Cart body; 11-Mounting platform; 12-Wheel caster; 2-Hand handle; 3-Anti-tipping mechanism; 31-Tipping ring; 311-Counterweight ball; 32-Anti-tipping bar; 321-Moving rod; 322-Gear; 323-Arc block; 324-Slider; 325-Slide groove; 326-Fixing hole; 33-Support rod; 34-Connecting rod; 35-Adjusting seat; 36-Arc hook; 351-Rocking ball; 352-Limiting hole; 353-Positioning groove. Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0028] In the description of this invention, it should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to the other element.

[0029] In the description of this invention, it should be noted that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0030] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example

[0031] See Figure 1 and Figure 3 This invention provides an anti-tipping device for a handcart, comprising a handcart body 1 with a push handle 2 on it; an anti-tipping mechanism 3 is circumferentially mounted on the handcart body 1, the anti-tipping mechanism 3 including a tilting ring 31 mounted on the handcart body 3 and anti-tipping rods 32 evenly distributed on the tilting ring 31, with at least three anti-tipping rods 32; a counterweight ball 311 is provided inside the tilting ring 31, and the anti-tipping rods 32 drive the tilting ring 31 to move in the opposite direction to the tilting direction of the handcart body 1, and the counterweight ball 311 also moves in the opposite direction to the tilting direction of the handcart body 1. By moving the tilting ring 31 in the opposite direction, or by manually adjusting the tilting ring 31 to move in the opposite direction, the center of gravity is changed, preventing tipping. A mounting platform 11 is provided on the top of the handcart body 1, and casters 12 are provided on the bottom of the handcart body 1. Preferably, there are four anti-tipping rods 32, but this can be selected according to actual conditions.

[0032] See Figure 1 , Figure 3 and Figure 4 In an optional embodiment, the tilting ring 31 is a hollow ring, and the counterweight ball 311 can move within the tilting ring 31. The space of the tilting ring 31 is larger than that of the counterweight ball 311, which allows the counterweight ball 311 to rotate more smoothly and prevents it from getting stuck.

[0033] See Figure 1 , Figure 2 and Figure 3 In an optional embodiment, the tilting ring 31 is provided with a support rod 33, which extends into the interior of the handcart body 1. The support rod 33 is connected to a connecting rod 34, which is movably mounted on the adjusting seat 35. The support rods 33 are symmetrically distributed within the tilting ring 31. Preferably, there are three support rods 33. The connecting rod 34 is a vertical rod that fixes the support rods 33 in place. The connecting rod 34 can swing in any direction, facilitating the tilting ring 31 to tilt, thereby moving the counterweight ball 311.

[0034] See Figure 3 and Figure 5 In an optional embodiment, the adjusting seat 35 is provided with a rocking ball 351, and the connecting rod 34 is connected to the rocking ball 351. The adjusting seat 35 is provided with a limiting hole 352, and a positioning groove 353 is provided around the limiting hole 352. The rocking ball 351 can be interference-fitted with the adjusting seat 35 to prevent the tipping ring 31 from tipping over too easily, and also to make the change of weight more gradual. The positioning groove 353 can hold the connecting rod 34, providing a limit when the trolley tipps over, preventing it from tipping over in other directions. The limiting hole 352 limits the maximum tilting angle of the connecting rod 34, preventing the tilting angle from being too large and affecting the anti-tipping effect. The rocking ball 351 can also be set with a clearance fit, so that when the trolley tipps to one side, the rocking ball 351 is subjected to force that can cause the tipping ring 31 to deflect to the other side. Alternatively, screws are used to control the fit between the rocking ball 351 and the adjusting seat 35, which is convenient for use in different scenarios (static or dynamic).

[0035] See Figure 6 In an optional embodiment, the anti-tipping bar 32 includes a movable rod 321. The anti-tipping bar 32 contains a plurality of gears 322, which mesh with each other. The gears 322 are mounted within the anti-tipping bar 32 via a rotating shaft, on which a torsion spring is also mounted. When the trolley tilts, the movable rod 321 touches the ground and rises. Due to the action of the gears and the torsion spring, the movable rod 321 does not rise too quickly, preventing a rapid change in the center of gravity. The length of the movable rod 321 extending beyond the anti-tipping bar 32 in its natural state can be controlled by the elasticity of the torsion spring.

[0036] See Figure 6 In an optional embodiment, the top of the moving rod 321 is provided with an arc-shaped block 323, and the arc-shaped block 323 is provided with a plurality of counterweight balls 311. When the arc-shaped block 323 rises, it pushes the counterweight balls 311 into the tilting ring 31. When the tilting ring 31 tilts to one side, the counterweight balls 311 can enter the anti-tipping rod 32 on the other side. After the moving rod 321 on the other side descends, it can accommodate more counterweight balls 311.

[0037] See Figure 6 In an optional embodiment, the movable rod 321 is provided with a slider 324, and the anti-tipping rod 32 has a groove 325 for the slider 324. The anti-tipping rod 32 has several fixing holes 326 to limit the maximum upward distance of the slider 324. To prevent the movable rod 321 from rising without restriction, pins are provided in the fixing holes 326 to control the rising and falling heights of the slider 324. The length of the movable rod 321 can also be adjusted to fix the trolley on a flat bottom surface.

[0038] See Figure 6 and Figure 7 In an optional embodiment, the bottom of the anti-tipping bar 32 is provided with an arc hook 36, which can be engaged with the push handle 2. The anti-tipping bar 32 can be rotatably mounted on the tipping ring 31, for example, with a connection structure of a round bar and a collar, not shown in the figure. The anti-tipping bar 32 and the tipping ring 31 are fixed together by a pin. Before use, the distribution structure of the multiple anti-tipping bars 32 is adjusted, preferably evenly distributed, and then fixed with pins. When not in use, to prevent the anti-tipping bar 32 from being too large to be easily placed, the pins are loosened and rotated so that the arc hook 36 can be hooked on the push handle 2. Since the push handle 2 pulls the anti-tipping bar 32, the tipping ring 31 is in a horizontal position. Under the change of center of gravity, the trolley itself is not easy to tilt, and the volume is also reduced.

[0039] See Figure 7 In an optional embodiment, a plurality of ball bearings are provided on the outer side of the anti-tipping bar 32, and the arc angle formed by the arc hook 36 is 45°~60°. If a small protrusion is encountered, the trolley is pushed forward, and the ball bearings contact the small protrusion and generate a sliding force, so the trolley is slowly lifted, which is much less effort than lifting the trolley directly. Because the trolley and the load are relatively heavy, it is not suitable for climbing very high steps. The same principle applies if it enters a small pit.

[0040] Specific work process: After the power switch is installed on the handcart body 1, when the handcart body 1 is moved, if the handcart body 1 tilts, for example, tilts to the right (from... Figure 1 (See) The anti-tipping bar 32 will contact the ground. Since the anti-tipping bar 32 and the tipping ring 31 are fixed, the tipping ring 31 tilts to the left under the push of the anti-tipping bar 32, and the counterweight ball 311 will slowly move to the left. This shifts the center of gravity to the left, and at the same time, because the anti-tipping bar 32 pushes the handcart body 1, the handcart body 1 is less likely to tip over.

[0041] The movable lever 321 can move along the direction of the anti-tipping lever 32 when the handcart body 1 tilts, for example, tilting to the right (from...). Figure 1 (See) The anti-tipping bar 32 will contact the ground. The moving bar 321 and the gear 322 inside the anti-tipping bar 32 are connected, and the torsion spring on the gear 322 provides a certain buffering force when tipping. At the same time, the counterweight ball 311 inside the anti-tipping bar 32 will be pushed into the tipping ring 31. Since the tipping ring 31 will tilt to the left, the counterweight ball 311 will move to the left, shifting the center of gravity to the left. Meanwhile, since the anti-tipping bar 32 pushes the handcart body 1, the handcart body 1 is not easy to tip over.

[0042] If you encounter a small pothole or step, actively adjust the moving rod 321 to change the position of the center of gravity, which will make it easier to move.

[0043] If a small bump or obstacle is encountered, the side of the arc hook 36 with the ball bearing will contact it. Due to the action of the ball bearing, under the action of thrust, the ball bearing will climb along the obstacle. The end of the arc hook 36 should be as close as possible to the caster wheel, so that the caster wheel will also climb along with the ball bearing as it climbs.

[0044] The anti-tipping bar 32 is fitted onto the tipping ring 31 and secured by a pin or nut. When not in use, the pin is removed for easy placement, allowing the anti-tipping bar 32 to rotate around the tipping ring 31 (not shown in the figure). The tipping ring 31 is circular, and multiple anti-tipping bars 32 can be moved together and finally placed on the push handle 2 via the inner groove of the arc hook 36.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for preventing tipping over a switch trolley, characterized in that: The device includes a handcart body (1), on which a push handle (2) is provided; an anti-tipping mechanism (3) is provided around the handcart body (1), the anti-tipping mechanism (3) includes a tilting ring (31) provided on the handcart body (1) and anti-tipping rods (32) evenly distributed on the tilting ring (31), the anti-tipping rods (32) being at least three; a counterweight ball (311) is provided inside the tilting ring (31), the anti-tipping rods (32) drive the tilting ring (31) to move in the opposite direction of the tilting direction of the handcart body (1), the counterweight ball (311) moves in the opposite direction of the tilting direction of the handcart body (1); the tilting ring (31) is a hollow ring, the counterweight ball (311) can move in the tilting ring (31); a support rod (33) is provided inside the tilting ring (31), the support rod (33) extending to the handcart body (1). The support rod (33) is connected to a connecting rod (34), and the connecting rod (34) is movably mounted on the adjusting seat (35). The adjusting seat (35) is provided with a rocking ball (351), and the rocking ball (351) is connected to the connecting rod (34). The adjusting seat (35) is provided with a limiting hole (352), and a positioning groove (353) is provided around the limiting hole (352). The anti-tipping rod (32) includes a moving rod (321), and several gears (322) are provided inside the anti-tipping rod (32). The moving rod (321) and the gears (322) mesh with each other. The gears (322) are installed inside the anti-tipping rod (32) through a rotating shaft, and a torsion spring is provided on the rotating shaft. The top of the moving rod (321) is provided with an arc-shaped block (323), and several counterweight balls (311) are provided on the arc-shaped block (323).

2. The anti-tipping device for a switch cart as described in claim 1, characterized in that: The movable rod (321) is provided with a slider (324), and the anti-tipping rod (32) is provided with a groove (325) for the slider (324).

3. The anti-tipping device for a switch cart as described in claim 2, characterized in that: The anti-tipping rod (32) is provided with several fixing holes (326) to limit the maximum distance the slider (324) rises.

4. The anti-tipping device for a switch cart as described in claim 1, characterized in that: The bottom of the anti-tipping bar (32) is provided with an arc hook (36), which can be locked on the push handle (2); a number of ball bearings are provided on the outside of the anti-tipping bar (32), and the arc angle formed by the arc hook (36) is 45°~60°.

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