Small electric lifting platform capable of accurately controlling lifting

Abstract

The utility model relates to the technical field of lifting platforms, and discloses a small-sized electric lifting platform capable of accurately controlling lifting, which comprises a chassis, an upper flat plate is arranged above the chassis, a cross arm is arranged between the chassis and the upper flat plate, silent trundles are fixedly mounted at four corners of the bottom of the chassis, and the upper flat plate and the lower flat plate are arranged on the chassis. An electric box is fixedly installed on the right side of the chassis, a handrail is arranged on the outer side of the electric box and fixedly connected to the chassis, and a guide rail is fixedly installed on the top of the upper flat plate. Automatic accurate height stopping is achieved through cooperation of the cross arm, the height selection switch, the bearing, the proximity switch and the direct-current reversing contactor, manual control and skilled operation are not needed, meanwhile, through driving combination of the two-way gear pump, the brush motor and the oil cylinder, the descending speed cannot be affected by the weight of goods on the upper flat plate, and the descending efficiency is improved. And the descending process is uniform without pause and rebound, so that the accuracy of height positioning and the safety in the use process are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of lifting platform technology, and in particular to a small electric lifting platform with precise lifting control. Background Technology

[0002] The lifting height control of similar small electric lifting platforms currently on the market relies entirely on personal experience and skill level, with manual control via start / stop buttons. During ascent, a DC motor drives a gear pump to pressurize hydraulic oil from the tank into the cylinder, transmitting pressure to the piston rod and pushing it upwards to lift the platform. During descent, a solenoid valve directly depressurizes the cylinder, allowing the platform's own weight to compress the extended piston rod, returning the hydraulic oil to the tank and lowering the platform.

[0003] Existing small electric lifting platforms suffer from inaccurate lifting heights. The timing and speed at which the lifting button is released greatly affect the accuracy of the lifting height, resulting in a large error compared to the target height. This is very inconvenient for scenarios requiring precise lifting heights, such as lithium battery swapping cabinets, assembly line workbenches, and warehouse shelves. Furthermore, the defects are even more pronounced during the descent process. The descent speed varies greatly depending on whether there is a load on the platform, resulting in uneven descent speed, jerking, and bouncing. This is not only dangerous but also makes the height positioning very inaccurate, often requiring multiple lifting operations to reach the ideal height. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a small electric lifting platform with precise lifting control.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A small electric lifting platform with precise lifting control includes a chassis, an upper flat plate on top of the chassis, sliding grooves on the inner walls of the chassis and the upper flat plate, cross arms between the chassis and the upper flat plate, silent casters fixedly installed at the four corners of the chassis bottom, an electrical box fixedly installed on the right side of the chassis, a handrail fixedly connected to the chassis on the outside of the electrical box, a guide rail fixedly installed on the top of the upper flat plate, a smooth slide rail fixedly installed between the guide rails, a hydraulic cylinder in the middle of the chassis, a support base fixedly installed at the tail of the hydraulic cylinder, a fixing block fixedly installed on the chassis, the support base and the fixing block fixedly connected, a piston rod movably installed on the top of the hydraulic cylinder, a crossbar fixedly installed between the bottoms of the cross arms, the top of the piston rod fixedly connected to the crossbar, an electric lock, a height selection switch, an up switch, a down switch, and an emergency stop switch fixedly installed on the top of the electrical box, and a DC commutator contactor fixedly installed inside the electrical box.

[0007] As a further embodiment of this utility model, bearings are movably installed at the upper and lower ends of the cross arm. The bearings are movably engaged in the sliding grooves of the chassis and the upper flat plate. A fixing frame is fixedly installed on the chassis at the position corresponding to the bearing. A proximity switch is provided on the side of the fixing frame near the bearing. The lifting switch is movably installed on the fixing frame by bolts. A trigger block is fixedly installed on the inner side of the bearing at the position corresponding to the proximity switch.

[0008] As a further embodiment of this utility model, a valve seat is fixedly connected to the side wall of the cylinder, a bidirectional gear pump is fixedly connected to the left side of the valve seat, and a brushed motor is fixedly installed on the right side of the valve seat.

[0009] As a further embodiment of this utility model, a voltmeter is fixedly installed on the top of the electrical box.

[0010] As a further embodiment of this utility model, a limit rod is movably installed on the side wall of the guide rail.

[0011] As a further embodiment of this utility model, a battery pack is provided inside the electrical box, and a master control switch is fixedly installed on the side wall of the electrical box, the master control switch being connected to the battery pack.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. In this utility model, the height is selected by a height selection switch, the proximity switch corresponding to the height is activated, and then the rise switch is pressed. At this time, the DC reversing contactor is engaged, the brushed motor starts and drives the bidirectional gear pump to rotate in the forward direction to generate high pressure. The hydraulic oil is forced into the sealed cavity of the oil cylinder. At this time, the piston rod will be pushed out of the oil cylinder, and the piston rod will push the crossbar. The crossbar will drive the cross arm to unfold and raise the upper plate, raising the goods on the top of the upper plate. When the trigger block inside the bearing contacts the proximity switch, the DC reversing contactor will be disengaged. At this time, the brushed motor stops, and the position of the upper plate will be fixed at the current position, maintaining the current height, thus achieving automatic and precise height stopping without human control or skilled operation.

[0014] 2. In this utility model, by pressing the descent switch, the brushed motor starts and drives the bidirectional gear pump to rotate in the opposite direction to generate high pressure. The hydraulic oil is forced out from the sealed cavity of the oil cylinder. At this time, the piston rod will retract into the oil cylinder at a constant speed. The piston rod will drive the crossbar to reset at a constant speed. The crossbar will drive the cross arm to fold up, so that the goods on the top of the upper plate will be lowered at a constant speed. Thus, the descent speed will not be affected by the weight of the goods on the upper plate. The process is uniform without any stuttering or rebound, which greatly improves the accuracy of height positioning and the safety of use. Attached Figure Description

[0015] Figure 1 This is a side view of a small electric lifting platform with precise lifting control proposed in this utility model;

[0016] Figure 2 This is a top view of a small electric lifting platform with precise lifting control proposed in this utility model;

[0017] Figure 3 This is a schematic diagram of the hydraulic cylinder and cross arm structure of a small electric lifting platform with precise lifting control proposed in this utility model.

[0018] Figure 4 This is a schematic diagram of the bottom structure of a small electric lifting platform with precise lifting control proposed in this utility model;

[0019] Figure 5 This is a schematic diagram of the internal structure of the electrical box of a small electric lifting platform with precise lifting control proposed in this utility model.

[0020] In the diagram: 1. Chassis; 2. Upper plate; 3. Cross arm; 4. Silent casters; 5. Electrical box; 6. Handrail; 7. Guide rail; 8. Fixing block; 9. Bidirectional gear pump; 10. Support base; 11. Flow rail; 12. Limit rod; 13. Electric lock; 14. Voltmeter; 15. Height selection switch; 16. Up switch; 17. Down switch; 18. Emergency stop switch; 19. Valve seat; 20. Brushed motor; 21. Hydraulic cylinder; 22. Piston rod; 23. Crossbar; 24. Bearing; 25. Fixing bracket; 26. Proximity switch; 27. Battery pack; 28. DC commutator contactor; 29. ​​Master control switch. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and 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 this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Reference Figure 1 - Figure 4 A small electric lifting platform with precise lifting control includes a chassis 1, an upper flat plate 2 on top of the chassis 1, sliding grooves on the inner walls of the chassis 1 and the upper flat plate 2, a cross arm 3 between the chassis 1 and the upper flat plate 2, silent casters 4 fixedly installed at the four corners of the bottom of the chassis 1, an electrical box 5 fixedly installed on the right side of the chassis 1, a handrail 6 fixedly connected to the chassis 1 on the outside of the electrical box 5, a guide rail 7 fixedly installed on the top of the upper flat plate 2, a smooth slide rail 11 fixedly installed between the guide rails 7, a hydraulic cylinder 21 in the middle of the chassis 1, a support base 10 fixedly installed at the tail of the hydraulic cylinder 21, a fixing block 8 fixedly installed on the chassis 1, and the support base 10 and... The fixed block 8 is fixedly connected. The piston rod 22 is movably installed on the top of the cylinder 21. The crossbar 23 is fixedly installed between the bottom of the cross arms 3. The top of the piston rod 22 is fixedly connected to the crossbar 23. The top of the electrical box 5 is fixedly installed with an electric lock 13, a height selection switch 15, an up switch 16, a down switch 17, and an emergency stop switch 18. The DC commutator contactor 28 is fixedly installed inside the electrical box 5. Open the electric lock 13, then select the height through the height selection switch 15, activate the proximity switch 26 of the corresponding height, and then press the up switch 16 or the down switch 17. At this time, the DC commutator contactor 28 will engage, and the brushed motor 20 will start to drive the bidirectional gear pump 9 to rotate forward or reverse.

[0025] In this embodiment, bearings 24 are movably installed at the upper and lower ends of the cross arm 3. The bearings 24 are movably engaged in the sliding grooves of the chassis 1 and the upper flat plate 2. A fixing frame 25 is fixedly installed on the chassis 1 at the position corresponding to the bearings 24. A proximity switch 26 is provided on the side of the fixing frame 25 near the bearings 24. The rising switch 16 is movably installed on the fixing frame 25 by bolts. A trigger block is fixedly installed on the inner side of the bearing 24 at the position corresponding to the proximity switch 26. When the trigger block on the inner side of the bearing 24 contacts the proximity switch 26, the DC commutation contactor 28 will disconnect. At this time, the brushed motor 20 stops rotating, and the position of the upper flat plate 2 will be fixed at the current position.

[0026] In this embodiment, a valve seat 19 is fixedly connected to the side wall of the cylinder 21. A bidirectional gear pump 9 is fixedly connected to the left side of the valve seat 19, and a brushed motor 20 is fixedly installed on the right side of the valve seat 19. When the brushed motor 20 starts, it drives the bidirectional gear pump 9 to rotate and generate high pressure. Hydraulic oil will be forced into the sealed cavity of the cylinder 21, and at this time the piston rod 22 will be pushed out from the cylinder 21.

[0027] In this embodiment, a voltmeter 14 is fixedly installed on the top of the electrical box 5, which allows for quick observation of the electrical charge.

[0028] In this embodiment, a limiting rod 12 is movably installed on the side wall of the guide rail 7. By rotating the limiting rod 12, the right-angle hook at the tail of the limiting rod 12 is turned towards the goods, and the goods cannot slide off the smooth rail 11 due to the limiting rod 12.

[0029] In this embodiment, a battery pack 27 is installed inside the electrical box 5, and a main control switch 29 is fixedly installed on the side wall of the electrical box 5. The main control switch 29 is connected to the battery pack 27. The main control switch 29 can control the battery pack 27 to supply power to the device, which is convenient for power outage in an emergency.

[0030] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: When in use, the device is pushed to the loading and unloading position by the cooperation of the handrail 6 and the silent caster 4, and then the goods are transported to the flow rail 11. Then the limiting rod 12 is rotated so that the right angle hook at the end of the limiting rod 12 is turned towards the goods. The goods cannot slide off the flow rail 11 due to the limiting rod 12.

[0031] When it is necessary to raise the goods, turn on the main control switch 29 to connect the power supply of the battery pack 27 to the device, then turn on the electric lock 13, and then select the height through the height selection switch 15 to activate the proximity switch 26 of the corresponding height. Then press the rise switch 16. At this time, the DC reversing contactor 28 will be engaged, and the brushed motor 20 will start to drive the bidirectional gear pump 9 to rotate in the forward direction to generate high pressure. The hydraulic oil will be forced into the sealed cavity of the oil cylinder 21. At this time, the piston rod 22 will be pushed out from the oil cylinder 21. The piston rod 22 will push the crossbar 23, and the crossbar 23 will drive the cross arm 3 to unfold and raise the upper plate 2, raising the goods on the top of the upper plate 2. When the trigger block inside the bearing 24 contacts the proximity switch 26, the DC reversing contactor 28 will be disengaged. At this time, the brushed motor 20 will stop, and the position of the upper plate 2 will be fixed at the current position, maintaining the current height, thus achieving automatic and precise height stopping without human control or skilled operation.

[0032] When lowering the cargo, the desired descent height is selected via the height selection switch 15, activating the corresponding proximity switch 26. Then, the descent switch 17 is pressed, at which point the DC reversing contactor 28 engages, and the brushed motor 20 starts, driving the bidirectional gear pump 9 to rotate in the opposite direction to generate high pressure. Hydraulic oil is forced out from the sealed cavity of the cylinder 21. At this time, the piston rod 22 retracts into the cylinder 21 at a constant speed. The piston rod 22 drives the crossbar 23 to reset at a constant speed, and the crossbar 23 drives the cross arm 3 to fold up, so that the cargo on the top of the upper plate 2 is lowered at a constant speed. This ensures that the descent speed is not affected by the weight of the cargo on the upper plate 2, and the process is uniform without any jerking or rebound, greatly improving the accuracy of height positioning and the safety of use.

[0033] The circuit in this solution can be implemented by simple programming by those skilled in the art, and is common knowledge in the field. It is used without modification, so the control method and circuit connection will not be explained in detail in this utility model.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A small electric lifting platform with precise lifting control, comprising a chassis (1), characterized in that, A top plate (2) is provided above the chassis (1). Slide grooves are provided on the inner walls of the chassis (1) and the top plate (2). A cross arm (3) is provided between the chassis (1) and the top plate (2). Silent casters (4) are fixedly installed on the four corners of the bottom of the chassis (1). An electrical box (5) is fixedly installed on the right side of the chassis (1). A handrail (6) is provided on the outside of the electrical box (5). The handrail (6) is fixedly connected to the chassis (1). A guide rail (7) is fixedly installed on the top of the top plate (2). A smooth slide rail (11) is fixedly installed between the guide rails (7). A hydraulic cylinder (21) is provided in the middle of the chassis (1). A support base (10) is fixedly installed at the tail of the hydraulic cylinder (21), and a fixing block (8) is fixedly installed on the chassis (1). The support base (10) is fixedly connected to the fixing block (8). A piston rod (22) is movably installed on the top of the hydraulic cylinder (21). A crossbar (23) is fixedly installed between the bottoms of the cross arms (3). The top of the piston rod (22) is fixedly connected to the crossbar (23). An electric lock (13), a height selection switch (15), an up switch (16), a down switch (17), and an emergency stop switch (18) are fixedly installed on the top of the electrical box (5). A DC commutator contactor (28) is fixedly installed inside the electrical box (5).

2. The small electric lifting platform with precise lifting control according to claim 1, characterized in that, Bearings (24) are movably installed at the upper and lower ends of the cross arm (3). The bearings (24) are movably engaged in the sliding grooves of the chassis (1) and the upper flat plate (2). A fixing frame (25) is fixedly installed on the chassis (1) at the position corresponding to the bearing (24). A proximity switch (26) is provided on the side of the fixing frame (25) near the bearing (24). The rising switch (16) is movably installed on the fixing frame (25) by bolts. A trigger block is fixedly installed on the inner side of the bearing (24) at the position corresponding to the proximity switch (26).

3. The small electric lifting platform with precise lifting control according to claim 1, characterized in that, A valve seat (19) is fixedly connected to the side wall of the cylinder (21). A bidirectional gear pump (9) is fixedly connected to the left side of the valve seat (19), and a brushed motor (20) is fixedly installed on the right side of the valve seat (19).

4. A small electric lifting platform with precise lifting control according to claim 1, characterized in that, A voltmeter (14) is fixedly installed on the top of the electrical box (5).

5. A small electric lifting platform with precise lifting control according to claim 1, characterized in that, A limit rod (12) is movably installed on the side wall of the guide rail (7).

6. A small electric lifting platform with precise lifting control according to claim 1, characterized in that, The electrical box (5) is equipped with a battery pack (27), and a master control switch (29) is fixedly installed on the side wall of the electrical box (5). The master control switch (29) is connected to the battery pack (27).

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