Electric lifting transfer trolley for circuit breaker

Abstract

The utility model discloses an electric lifting transfer trolley for a circuit breaker, which comprises a trolley main body and a tray electrically driven to lift relative to the trolley main body, a movable hook plate on the tray swings and extends out relative to the front end of the tray, the movable hook plate comprises an adjusting plate, a limiting hook plate and a reset tension spring, and the adjusting plate is inserted into the tray and swings relative to the vertical direction of the tray. The limiting hook plate is hinged to the adjusting plate and horizontally swings relative to the adjusting plate. The reset tension spring is used for pulling the adjusting plate to horizontally reset. According to the transfer trolley, the adjusting plate is connected with the tray beam body in an inserted mode, the limiting hook plate which can swing in a hinged mode relative to the vertical direction of the tray, the limiting hook plate is connected with the adjusting plate in a hinged mode, the reset tension spring is arranged in the horizontal swing direction so that the limiting hook plate can automatically stretch out forwards, and the limiting hook plate can be matched with a hook groove preset in an installation cabinet in the using process. Swing insertion is carried out in the height direction and the horizontal direction to complete hooking by adapting to the position height of the hooking groove, and the problem that the transfer trolley retreats and disengages relative to the mounting cabinet when the circuit breaker is transferred is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of electric lifting and transfer vehicles, specifically to an electric lifting and transfer vehicle for circuit breakers. Background Art

[0002] Currently, in high-voltage switchgear, the Kai switchgear adopts a center-mounted circuit breaker structure and can be operated by handcart or electric lifting trolley. Although some manufacturers provide dedicated transfer carts, various problems still exist that make on-site operation inconvenient. For example, Chinese Patent Publication No. CN202308849U, published on July 4, 2012, discloses a transfer trolley for the lower layer of switchgear. Although the transfer trolley can be adjusted vertically, the adjustment is inconvenient, and its positioning is close to the width of the trolley body, requiring high machining precision. Furthermore, it lacks a reliable connection to the cabinet, resulting in the trolley moving in the opposite direction when the handcart is pushed into or pulled out of the cabinet, causing inconvenience in use. Additionally, its rotation direction is inflexible, only allowing forward and backward movement, leading to cumbersome on-site operation. Utility Model Content

[0003] In view of the existing technology, the purpose of this utility model is to provide an electric lifting and transport vehicle for circuit breakers, which is equipped with a hook plate structure that is convenient to cooperate with the installation cabinet, making it easy to hook and transport the circuit breaker, and ensuring strong safety.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an electric lifting and transfer vehicle for circuit breakers, including a trolley body and a pallet that is electrically driven to lift relative to the trolley body. The pallet is provided with a movable hook plate, which is hinged to the front end of the pallet and swings out. The movable hook plate includes an adjusting plate, a limiting hook plate, and a reset spring. The adjusting plate is inserted into the pallet and swings vertically relative to the pallet. The limiting hook plate is hinged to the adjusting plate and swings horizontally relative to the adjusting plate. The reset spring is used to pull the adjusting plate to return to its horizontal position.

[0005] As a further feature of the above solution, the main body of the trolley includes a chassis, an electric control compartment, and a lifting seat. The electric control compartment is also equipped with casters with brakes, and the tray is equipped with a plate assembly for adjusting the tray spacing.

[0006] As a further feature of the above solution, the tray is provided with a slot that matches the size of the adjustment plate and a swing groove that is larger than the adjustment plate in the vertical direction.

[0007] As a further feature of the above solution, the adjusting plate and the tray are also provided with a through rod, and a top spring is sleeved on the through rod. The top spring is used to push the adjusting plate to swing vertically to reset.

[0008] As a further feature of the above solution, one end of the reset spring is hooked onto the limiting hook plate, and the other end is fixed to the tray, which is used to pull the limiting hook plate to extend and swing forward of the trolley body.

[0009] As a further feature of the above solution, the limiting hook plate is also provided with a swing clearance angle, and the front end of the limiting hook plate is also provided with a hook head that is opposite to the hook groove on the installation cabinet.

[0010] Beneficial effects: The transfer trolley of this utility model connects to the pallet beam via an adjusting plate, and the swing groove at the front end of the plate is larger than the adjusting plate, allowing the adjusting plate to swing vertically relative to the pallet. The limiting hook plate is hinged to the adjusting plate, and a reset spring is provided in the horizontal swing direction to automatically extend forward. In use, the limiting hook plate, which cooperates with the pre-set hook groove on the installation cabinet, swings and inserts itself according to the height of the hook groove in both the height and horizontal directions. Therefore, the limiting hook plate can be smoothly inserted into the hook groove to complete the hooking without complete alignment, thus avoiding the problem of the transfer trolley retracting and detaching relative to the installation cabinet when the circuit breaker is transferred. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the electric lifting and transfer vehicle of this utility model.

[0012] Figure 2 This is a schematic diagram of the tray structure in this embodiment.

[0013] Figure 3 This is a schematic diagram of the movable hook plate structure in this embodiment.

[0014] Figure 4 This is a schematic diagram of the limiting hook plate structure in this embodiment.

[0015] Figure 5 This is a schematic diagram of the cross-sectional structure of the movable hook plate in this embodiment.

[0016] Reference numerals: 1. Car body; 11. Base frame; 12. Electric control compartment; 13. Lifting seat; 14. Casters; 15. Braking device; 2. Tray; 21. Slot; 22. Swing slot; 23. Through rod; 24. Top spring; 3. Movable hook plate; 31. Adjusting plate; 32. Limiting hook plate; 33. Return spring; 35. Hook head; 36. Swing clearance angle. DETAILED DESCRIPTION

[0017] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other.

[0018] like Figure 1-5The circuit breaker electric lifting and transfer vehicle shown includes a trolley body 1 and a pallet 2 that is electrically driven to lift relative to the trolley body 1. The pallet 2 is provided with a movable hook plate 3, which is hinged to the front end of the pallet 2 and swings out. The movable hook plate 3 includes an adjusting plate 31, a limiting hook plate 32, and a return spring 33. The adjusting plate 31 is inserted into the pallet 2 and swings vertically relative to the pallet 2. The limiting hook plate 32 is hinged to the adjusting plate 31 and swings horizontally relative to the adjusting plate 31. The return spring 33 is used to pull the adjusting plate 31 to return to its horizontal position.

[0019] As a further feature of the above scheme, the tray 2 is provided with a slot 21 that matches the size of the adjustment plate 31 and a swing groove 22 that is larger than the adjustment plate 31 in the vertical direction.

[0020] As a further feature of the above scheme, the adjusting plate 31 and the tray 2 are also provided with a through rod 23, and a top spring 24 is sleeved on the through rod 23. The top spring 24 is used to push the adjusting plate 31 to swing vertically to reset.

[0021] As a further feature of the above scheme, one end of the reset spring 33 is hooked onto the limiting hook plate 32, and the other end is fixed to the tray 2, which is used to pull the limiting hook plate 32 to extend and swing forward of the trolley body 1.

[0022] As a further feature of the above scheme, the limiting hook plate 32 is also provided with a swing clearance angle 36, and the front end of the limiting hook plate 32 is also provided with a hook head 35 that is opposite to the hook groove on the installation cabinet.

[0023] refer to Figure 1 The electric lifting and transfer vehicle structure of this utility model is shown. In this embodiment, the transfer vehicle includes a trolley body 1 and a tray 2 that is electrically driven to lift relative to the trolley body 1. A movable hook plate 3 is also provided on the tray 2, which is hinged to the front end of the tray 2 and extends outwards. The trolley body 1 also includes, as shown in the figure... Figure 1 The base frame 11, electric control compartment 12, and lifting seat 13 are shown. The electric control compartment 12 is also equipped with casters 14 with brake devices 15. The tray 2 is equipped with insert plate assembly 16 for adjusting the spacing of the tray 2.

[0024] Referring to the above structural settings, such as Figure 2The movable hook plate 3 shown in this embodiment is installed on the beam at the front end of the pallet 2, and its position is below the platform on the pallet 2 used for placing the circuit breaker. Its main function and significance is that when the transfer vehicle is transferring the circuit breaker, that is, when the transfer vehicle moves the circuit breaker from the outside to the installation cabinet, the operator moves the transfer vehicle to the front of the installation cabinet, and then controls the pallet 2 to rise and fall relative to the base frame 11 through the action of the electric control compartment 12 and the lifting seat 13. The operator controls the pallet 2 to rise and fall to a suitable height position, that is, the main ground of the pallet 2 is flush with the bottom surface of the installation cavity of the installation cabinet. At this time, the front of the pallet 2 faces When installing the cabinet, the circuit breaker on the transfer cart needs to move relative to the cabinet. Considering the mobility of the transfer cart, although a brake device 15 is provided for the casters 14, it cannot guarantee the stability of the transfer cart. In order to prevent the transfer cart from moving away from the cabinet when the workers move the circuit breaker into the cabinet, this embodiment further provides a movable hook plate 3 as described above, which cooperates with the hook groove on the cabinet. The movable hook plate 3 hooks the hook groove to realize the connection and linkage between the two. The movable hook plate 3 hooks the cabinet, and the transfer cart cannot move away before the movable hook plate 3 is released, thus ensuring the safety of the operation.

[0025] Further reference Figure 2 and Figure 3 The movable hook plate 3 shown in this embodiment includes an adjusting plate 31, a limiting hook plate 32, and a return spring 33. Regarding the tray 2, to improve the usability of the movable hook plate 3, this embodiment also provides a slot 21 on the tray 2 that matches the size of the adjusting plate 31 and a swing groove 22 that is larger than the adjusting plate 31 in the vertical direction. The purpose of this arrangement is to allow the adjusting plate 31 to swing vertically relative to the tray 2 after it is inserted into the tray 2. Furthermore, as... Figure 5 As shown, a through rod 23 runs through the middle of the adjusting plate 31, and a top spring 24 is fitted on the through rod 23. Figure 4 and Figure 5 The two ends of the top spring 24 abut against the lower end face of the tray 2 and the upper end of the adjusting plate 31, respectively. Under the drive of the spring force, the adjusting plate 31 will be pushed by it. Without the influence of external force, the spring force pushes the adjusting plate 31 to move towards the swing groove 22. Figure 5The device in this embodiment is normally positioned slightly lower and rests against the bottom of the swing groove 22. That is, the top spring 24 is used to push the adjusting plate 31 to swing vertically back to its original position. This means that under the influence of external force, the adjusting plate 31 may move upward to adapt to the operation requirements. After the external force is removed, the adjusting plate 31 returns to its initial position against the bottom of the swing groove 22 under the action of the top spring 24. The function of the top spring 24 is not only to ensure the stability of the vertical position of the adjusting plate 31, or the movable hook plate 3, in the non-use state, but also to prevent the adjusting plate 31 from constantly swinging and bumping under vibration during the movement of the trolley, causing noise and continuous wear.

[0026] Furthermore, based on the above, in this embodiment, one end of the limiting hook plate 32 is hinged to the adjusting plate 31 to cooperate with external force and the return spring 33 to achieve a horizontal swing setting relative to the adjusting plate 31. The limiting hook plate 32 is only hinged to the adjusting plate 31, meaning that under the influence of the adjusting plate 31, the limiting hook plate 32 also swings vertically with the top spring 24 or external force. Additionally, referring to... Figure 2 and Figure 3 As shown, in this embodiment, the reset spring 33 is hooked onto the end of the limiting hook plate 32 away from the hinged end with the adjusting plate 31, and the other end of the reset spring 33 is hooked onto the tray 2 for fixation. In the active state, the reset spring 33 applies a continuous pulling force to the end of the limiting hook plate 32, causing it to swing. Based on the planar fit between the end of the limiting hook plate 32 and the tray 2 (the right angle between the edge of the plane of the end of the limiting hook plate 32 and the center distance of the through rod 23 limits the possibility of its continued swing), the maximum swing angle of the moving hook plate 33 (without being forcibly broken by external force) towards the side pulled by the reset spring 33 is to extend forward of the front of the trolley body 1, that is, the movable hook plate 3 extends towards the mounting cabinet in the static state. This angle is designed to facilitate the user to quickly insert the movable hook plate 3 into the hook groove on the mounting cabinet when the transfer vehicle is in use.

[0027] Furthermore, as mentioned above, the limiting hook plate 32 will return to a forward-extending swing state under the elastic return force of the return spring 33. Under the drive of external force, based on the swing relief angle 36 provided on the side of it that is attached to the tray 2, it has the possibility of swinging in the opposite direction of the return spring 33, realizing the unilateral swing setting of the limiting hook plate 32. In addition, a hook head 35 is provided at the front end of the limiting hook plate 32, which is opposite to the hook groove on the mounting cabinet. The hook head 35 is used to hook the inner wall edge of the hook groove after being inserted into the hook groove. In this case, the return spring 33 also has the function of providing a return force to prevent the movable hook plate 3 from falling off the hook groove side.

[0028] The transfer cart of this utility model, through the setting of the movable hook plate 3, allows the transfer cart to move to the front of the installation cabinet and adjust its height during use. The movable hook plate 3 then swings in vertical height and horizontal angle to compensate for the misalignment between the transfer cart and the installation cabinet, allowing the movable hook plate 3 to better match and extend into the hook groove. Under the action of the return spring 33, it stably hooks into the hook groove, realizing the stable connection and limit of the transfer cart in front of the installation cabinet. After the equipment transfer is completed, the movable hook plate 3 is pushed in the opposite direction and the transfer cart is pulled to smoothly disengage from the hook.

[0029] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A circuit breaker electric lifting and transfer vehicle, comprising a trolley body (1) and a pallet (2) electrically driven to lift relative to the trolley body (1), characterized in that: The tray (2) is provided with a movable hook plate (3). The movable hook plate (3) is located at the front end of the tray (2) and swings out. The movable hook plate (3) includes an adjusting plate (31), a limiting hook plate (32) and a reset spring (33). The adjusting plate (31) is inserted into the tray (2) and swings vertically relative to the tray (2). The limiting hook plate (32) is hinged to the adjusting plate (31) and swings horizontally relative to the adjusting plate (31). The reset spring (33) is used to pull the adjusting plate (31) to return to its horizontal position.

2. The circuit breaker electric lifting and transfer vehicle according to claim 1, characterized in that: The main body (1) of the trolley includes a base frame (11), an electric control compartment (12), and a lifting seat (13). The electric control compartment (12) is also equipped with casters (14) with brake devices (15), and the tray (2) is equipped with a plate assembly (16) for adjusting the spacing of the tray (2).

3. The circuit breaker electric lifting and transfer vehicle according to claim 1, characterized in that: The tray (2) is provided with a slot (21) that matches the size of the adjustment plate (31) and a swing groove (22) that is larger than the adjustment plate (31) in the vertical direction.

4. The circuit breaker electric lifting and transfer vehicle according to claim 3, characterized in that: The adjusting plate (31) and the tray (2) are also provided with a through rod (23), and a top spring (24) is sleeved on the through rod (23). The top spring (24) is used to push the adjusting plate (31) to swing vertically to reset.

5. The circuit breaker electric lifting and transfer vehicle according to claim 1, characterized in that: One end of the reset spring (33) is hooked on the limiting hook plate (32), and the other end is fixed on the tray (2), which is used to pull the limiting hook plate (32) to extend and swing forward of the trolley body (1).

6. The circuit breaker electric lifting and transfer vehicle according to claim 1, characterized in that: The limiting hook plate (32) is also provided with a swing clearance angle (36), and the front end of the limiting hook plate (32) is also provided with a hook head (35) that is opposite to the hook groove on the installation cabinet.

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