TWI727252B - Electric lifting trolley - Google Patents

Abstract

The invention is an electric lifting trolley suitable for workers in factories and warehouses to quickly and conveniently carry heavy objects. It has a switch group, a control group and a lifting group. The lifting group has a platform and a base, and the base is provided with multiple wheels and grips. The frame is used to push the base. A first bracket group, a second bracket group and a hydraulic rod are arranged between the platform and the base. The hydraulic rod is connected to the pump by a hydraulic tube. The control group has a power supply, a circuit board, and a circuit. The board is electrically connected with the power supply, the pump and the switch group, and the touch switch group controls the pump through the circuit board to make the hydraulic rod expand and contract to move the first bracket group and the second bracket group to raise and lower the platform.

Description

Electric lifting trolley

The invention is an electric lifting trolley, which is suitable for workers in factories, warehouses, etc., to quickly and conveniently carry heavy objects.

Moving heavy objects is a very difficult task. For workers such as factories and warehouse management, moving heavy objects is quite frequent, whether it is moving heavy objects from a low place to a high place, or moving heavy objects from a high place. The process of going to a low place requires repeated squatting and standing up under the weight-bearing situation. This behavior puts a considerable burden on the body, especially for older people with weaker muscles, and may strain their feet and hands during the process. Displacement of muscles and even joints causes injury.

In order to solve the problem of frequently squatting and standing up under heavy loads when carrying heavy objects, a lifting trolley is introduced on the market, which is equipped with a lifting platform, and a hydraulic pressure is connected between the lifting platform and the trolley. The hydraulic rod is connected with a foot pedal. When the user wants to carry a heavy object to a high place, the heavy object is moved to the top of the lifting platform. When the pedal is repeatedly stepped on, the hydraulic rod extends the lifting platform and rises. When carrying heavy objects to a low place, the switch on the handle is activated to allow the liquid inside the hydraulic rod to flow back and the hydraulic rod retracts to lower the lifting platform. The use of the above mechanism allows the user to quickly and conveniently carry the heavy objects.

The conventional elevating trolley in the above content has the following problems: 1. It is necessary to repeatedly step on the pedals to make the elevating platform ascend. The heavier the weight of the elevating platform is, the heavier the weight is required. The greater the pedaling force. 2. A lot of stamina is consumed even under repeated stepping. When the switch on the handle is activated, the lowering speed of the lifting platform cannot be controlled when it is lowered. If the lowering speed is too fast, it will cause serious injury. 3. Finally, because the pedal must be repeatedly stepped on, the mechanism is easy to wear and consume, and if it is damaged, it must be replaced, causing additional expenses.

The invention provides an electric lifting trolley, which is suitable for workers in factories, warehouses, etc., to quickly and conveniently carry heavy objects. Pumps are used to raise the platform, without the need to step on the lifting platform like the conventional lifting trolley, which causes additional consumption. Physical strength, with a control group that can control the oil return speed inside the oil pressure rod, so as to control the descending speed of the platform, and because the foot pedal is no longer used, there is no problem of wearing the foot pedal.

An electric lifting trolley comprising: a platform including a platform front part and a platform rear part; the two sides of the rear part of the platform each have a platform slide rail; the bottom surface of the rear part of the platform is provided with two platform openings, and the two platform openings are respectively Connected with each platform slide rail; a base, the bottom of which is provided with a plurality of wheels, wherein the base includes a base front, a base rear, two sides of the rear of the base each have a base slide, the top surface of the rear of the base is provided Two base openings, the two base openings are respectively connected with the base slide rails, one end of the base is provided with a holder, and the grip holder is provided with a switch group; a first connecting rod whose two ends are respectively slidably arranged on the two platform slide rails; A first bracket group and a second bracket group are respectively pivoted between the platform and the base, wherein the first bracket group includes a first bracket and a second bracket, and the second bracket group includes a first bracket Three brackets and a fourth bracket, the first bracket and the second bracket are located on the same side and cross each other and are pivotally connected to each other at the intersection to form a first pivoting portion, the third bracket and the fourth bracket are located on the same side Each other Cross each other and pivotally connect to each other at the intersection to form a second pivotal portion. The first bracket is at the lower section of the first pivotal portion as the lower section of the first bracket, and the third bracket is at the lower section of the second pivotal portion as The lower section of the third bracket, the lower section of the first bracket and the lower section of the third bracket each extend an extension bracket in the direction of the base, a second link is pivoted between the two extension brackets, the first bracket group and the second bracket The two bracket sets are respectively disposed on each platform slide rail and each base slide rail through the two platform openings and the two base openings; wherein one end of each of the first bracket and the third bracket is pivotally connected to the two ends of the front of the platform, respectively , And the other ends of the first bracket and the third bracket are respectively slidably disposed on the two base slide rails, and one ends of the second bracket and the fourth bracket are respectively pivotally connected to the two ends of the front of the base, and The other ends of the second bracket and the fourth bracket are respectively slidably disposed on the two base slide rails and pivoted on the two ends of the first link. The base is frame-shaped. When the platform is at the lowest height, the second The connecting rod and the extension bracket partly extend below the base; wherein a hydraulic rod is connected between the first connecting rod and the second connecting rod, and the hydraulic rod is connected to a pump. When the platform is at the lowest height , The length of the hydraulic rod is the shortest and part of the second connecting rod extends under the base; and a control group, which includes a power supply and a circuit board, the switch group, the power supply and the pump are all connected to the The circuit board is electrically connected, and the pump is operated by the control group, so that the hydraulic rod expands and stops, so that the hydraulic rod drives the first bracket group and the second bracket group from the unfolding position to the retracted position and the process Medium stop, prompting the platform to rise and fall relative to the base and stop during the process.

1: Lifting group

2: platform

21: Front of the platform

22: Rear of the platform

23: Platform slide

24: Platform opening

25: curved board

3: The first bracket group

31: The first bracket

311: Lower section of the first bracket

32: second bracket

33: The first pivot

4: The second bracket group

41: third bracket

411: Lower section of third bracket

42: Fourth bracket

43: second pivot

5: Extension bracket

6: Base

61: Front of the base

62: Rear of the base

63: Base slide

64: Base opening

65: Outer peripheral surface

7: Hydraulic rod

71: connecting hole

8: The first link

9: The second link

10: Pump

20: Hydraulic pipe

30: Grip frame

301: Grip

40: Wheel

401: Stopper

4011: Card

50: Anti-pinch sensor

60: control group

70: switch group

701: Up Button

702: Stop Button

703: Down button

80: power supply

90: circuit board

100: wireless sensor

200: heavy

300: items

400: remote control

500: drawer

600: warning light

700: screen

The first figure is a three-dimensional schematic diagram of the platform of the present invention lowered to the lowest height.

The second figure is a three-dimensional schematic diagram of the platform of the present invention rising to the highest height.

The third figure is a schematic diagram of the platform of the present invention when placing a heavy object and stopping when it is lifted.

The fourth figure is a schematic cross-sectional view of line IV-IV in the second figure.

The fifth figure is a schematic cross-sectional view of the line V-V in the first figure.

The sixth figure is a schematic cross-sectional view of the VI-VI line in the second figure.

The seventh figure is a block diagram of the electric lifting trolley of the present invention.

Figure 8 is a schematic plan view of the platform of the present invention rising to the highest height.

The ninth figure is a schematic plan view of another angle when the platform of the present invention rises to the highest height.

The tenth figure is a three-dimensional schematic diagram of the platform of the present invention.

Figure 11 is a schematic diagram of a foreign object triggering the stop of the anti-pinch sensor platform of the present invention.

Figure 12 is a schematic diagram of the present invention using the remote controller to operate the platform.

The thirteenth figure shows the drawer-like intention of the platform of the present invention.

The fourteenth picture is an enlarged schematic diagram of a part of the creation.

To clearly illustrate the implementation of the present invention, please refer to the first to seventh figures, an electric lifting trolley, which includes a lifting group 1, a control group 60, a switch group 70, wherein: the lifting group 1 includes a platform 2. A first bracket group 3, a second bracket group 4, a base 6, a hydraulic rod 7, a first connecting rod 8, a second connecting rod 9, a pump 10, the bottom of the base 6 is provided There are a plurality of wheels 40, the base 6 is provided with a holder 30, the base 6 is provided with two base slide rails 63 at intervals, the platform 2 is provided with two platform slide rails 23 at intervals, the platform 2 is located on the base 6, the first One end of each of a bracket group 3 and the second bracket group 4 is pivoted to the first link 8 at intervals, and two ends of the first link 8 are slidably disposed on the two platform slide rails 23, and the first bracket The opposite ends of the group 3 and the second bracket group 4 are respectively slidably disposed on the two base slide rails 63, and the second link 9 is pivoted on the Between the first bracket group 3 and the second bracket group 4, one end of the hydraulic rod 7 is pivotally connected to the first link 8 and the other end is pivotally connected to the second link 9, and the hydraulic rod 7 is connected to the The pump 10 is connected; the control group 60 includes a power supply 80 and a circuit board 90, the switch group 70, the power supply 80, and the pump 10 are all electrically connected to the circuit board 90, and the control group 60 makes the pump The pump 10 operates so that the hydraulic rod 7 expands and contracts and stops, so that the hydraulic rod 7 drives the first bracket group 3 and the second bracket group 4 from the unfolding position to the retracted position and stops during the process, prompting the platform 2 to be relatively The base 6 rises, falls, and stops during the process.

The implementation of the present invention is further introduced based on the above content. As shown in the first to fourth and seventh figures, this embodiment is introduced with the platform 2 of the lifting group 1 at the lowest height as the initial state. The switch group 70 has an up button 701, a stop button 702, and a down button 703 as an example. The power supply 80 of the control group 60 is used to supply power, and the holder 30 and the plurality of wheels 40 are arranged to facilitate pushing the base 6. Two platform slide rails 23 are respectively installed on two opposite sides of the platform 2, and the two base slide rails 63 are respectively installed on two opposite sides of the base 6 to place the heavy object 200 to be moved from a low place to a high place. On the platform 2, by triggering the up button 701, the switch group 70 transmits the signal to the circuit board 90, the circuit board 90 starts the pump 10, and the pump 10 causes the oil to be poured into the hydraulic rod 7 from the hydraulic pipe 20 and make When it stretches, the first stent group 3 and the second stent group 4 move from the folded position to the unfolded position to drive the platform 2 up. When it rises to the height of the position where the weight 200 is to be placed, it is triggered by triggering as shown in the third figure Stop button 702. The switch group 70 transmits the signal to the circuit board 90. The platform 2 stops moving, and the weight 200 can be pushed to the place where it is to be placed. When the weight 200 is to be moved from a high place to a low place, The weight 200 is placed on the platform 2. When the down button 703 is triggered, the switch group 70 transmits a signal to the circuit board 90, and the circuit board 90 controls the oil return speed of the hydraulic rod 7 so that the lowering speed of the platform 2 can be controlled. The first bracket group 3 and the second bracket group 4 are in the unfolded position to the folded position to drive the platform 2 down. As shown in the third figure, when the platform 2 is lowered to the height where the weight 200 is to be placed, by touching The stop button 702 is sent and the switch group 70 transmits the signal to the circuit board 90. The platform 2 stops moving, and the weight 200 can be pushed to the place to be placed.

From the above content, it can be known that the present invention only needs to touch the switch group 70 to lift the platform 2 and does not need to repeatedly step on the pedals as the conventional lifting trolley causes a lot of physical consumption, and the pump 10 can be used. The upper limit of the driving force is much larger than the upper limit of human foot force, so that the present invention can carry heavier weights 200. When the platform 2 is lowered, the control group 60 controls the oil return speed of the hydraulic rod 7 so that the platform 2 can be lowered. Controlled, not as good as the conventional elevating trolley, which generally has the problem of too fast descent, and because the pedals are no longer used, there is no problem of repairing and replacing the pedals.

The present invention is shown in the second and fourth to the ninth figures, wherein the first bracket group 3 includes a first bracket 31 and a second bracket 32, and the second bracket group 4 includes a third bracket 41 and A fourth bracket 42. One side of the base 6 without the base slide rail 63 is the base front 61 and the opposite side is the base rear 62. The platform 2 has one side without the platform slide rail 23 as The platform front 21 and the opposite side is the platform rear 22. One end of each of the first bracket 31 and the third bracket 41 is pivotally connected to the two ends of the platform front 21, and the first bracket 31 and the second bracket The other ends of the three brackets 41 are respectively slidably disposed on the two base slide rails 63, and one ends of the second bracket 32 and the fourth bracket 42 are pivotally connected to the two ends of the front part 61 of the base, and the second bracket The other ends of each of the fourth bracket 32 and the fourth bracket 42 are pivoted to the first link 8 at intervals. The first bracket 31 and the second bracket 32 are located on the same side and cross each other and are pivotally connected to each other at the intersection to form a first link. A pivoting portion 33, the third bracket 41 and the fourth bracket 42 are located on the same side and cross each other and are pivotally connected to each other at the intersection to form a second pivot portion 43. The first bracket 31 is at the first pivot portion The lower section of 33 is the lower section of the first bracket 311, and the lower section of the third bracket 41 at the second pivoting portion 43 is The lower section 411 of the third bracket, the second link 9 is located between the lower section 311 of the first bracket and the lower section 411 of the third bracket.

Continuing the above, when the tact switch group 70 wants to raise the platform, as shown in the second and fifth to ninth figures, the hydraulic rod 7 stretches to drive the first connecting rod 8 and the second connecting rod 9. The first link 8 makes the first bracket 31 pivot by the first pivot portion 33, the third bracket 41 pivots by the second pivot portion 43, the first bracket 31 and the third bracket 41 and One end of the two base slide rails 63 slidably moves from the base rear part 62 to the base front part 61, and the second link 9 makes the second bracket 32 pivot by the first pivot part 33 and the fourth The bracket 42 is pivoted by the second pivot portion 43. Due to the pulling of the second bracket 32 and the fourth bracket 42, the first link 8 has two ends of the first link 8 from the platform rear part 22 to the front of the platform. Sliding in the direction of the part 21, the first bracket group 3 and the second bracket group 4 expand the platform 2 up, and when the switch group 70 wants to make the platform 2 fall, the reverse action is performed according to the foregoing content. This structure can stabilize the platform 2 The rise and fall.

The present invention is shown in the second, fifth, and sixth figures, in which the first bracket 31 and the third bracket 41 go from the lower section of the first bracket 311 and the lower section of the third bracket to the base 6 respectively. There is an extension bracket 5 extending in the direction, the second link 9 is pivoted between the two extension brackets 5, the base 6 is frame-shaped, the platform 2 is located at the lowest height, the second link 9 and the extension bracket 5 part Exposed under the base 6, the design of the two extension brackets 5 allows the present invention to install a longer stroke hydraulic rod 7, so that the platform 2 can be raised to a higher height. The base 6 is frame-shaped. When the platform 2 is lowered to the lowest height, the lowest height of the platform 2 that can be lowered is not affected because the two extension brackets 5 reach the base 6.

As shown in the second and tenth figures of the present invention, the two base slide rails 63 are respectively provided with a base opening 64, and the two base slide rails 63 are respectively communicated with the respective base openings 64, A platform opening 24 is respectively provided under the two platform slide rails 23, and the two base slide rails 63 are respectively communicated with their respective base openings 64. The design of the two base openings 64 and the two platform openings 24 enables the first support The group 3 and the second bracket group 4 are slidably arranged on the two base slide rails 63 and the two platform slide rails 23 more easily.

In the present invention, as shown in the first and second figures, the top of the holding frame 30 has a holding portion 301, and the switch set 70 is provided on the holding portion 301. This design makes the switch set 70 easy to reach and easy to operate.

The present invention is shown in the first and fifth figures, wherein an arc-shaped arc plate 25 extends downwards around the platform, the base 6 has an outer peripheral surface 65, and the platform 2 is located at the lowest height of the outer peripheral surface of the base 6 The arc-shaped plate 25 partially covering the platform 2 is designed to reduce the dust entering between the platform 2 and the base 6 when the present invention is not in use.

As shown in the seventh and ninth figures of the present invention, the lifting assembly 1 is further provided with at least one anti-pinch sensor 50, which is electrically connected to the circuit board 90, and the anti-pinch sensor 50 Set at any position of the top of the base 6, any position of the bottom of the platform 2, any position of the first bracket group 3, any position of the second bracket group 4 or a combination of any number of positions above, the platform 2 descends If the anti-pinch sensor 50 is triggered, the platform 2 stops falling or the platform 2 rises. In this embodiment, the anti-pinch sensor 50 is installed on the top of the base and the platform 2 stops when triggered as an example. The lower platform 2 is used normally. Goods will be placed on top of the present invention so that the present invention is likely to become a blind spot in front of the present invention. When the platform 2 is lowered, other objects 300 may be caught, causing damage to the object 300 or damage to the mechanism of the present invention. The design of the sensor 50 can prevent this phenomenon.

The present invention is shown in the fifth and eighth figures, wherein the plurality of wheels 40 is further provided with a stopper 401, and the respective stoppers 401 of the plurality of wheels 40 are respectively provided with a clamping member 4011. Any stopper 401 activates the clamping member 4011 to be clamped to the wheel surface of the corresponding wheel 40, so that the corresponding wheel 40 cannot roll on the ground. This design can avoid when the present invention does not need to move , Moved due to accidental collision or pushing.

As shown in Figs. 7 and 12, the present invention further includes a remote controller 400. The control group 60 is located on the base 6 of the lifting group 1, and the control group 60 is further provided with a wireless sensor 100. The wireless sensor 100 is electrically connected to the circuit board 90. The control group 60 receives the wireless control signal of the remote controller 400 through the wireless sensor 100, so that the platform 2 of the lifting group 1 rises, stops, and falls. When the user wants to be on the platform 2 rises together with the weight 200 to facilitate pushing the weight 200 to the position to be placed. It is inconvenient to touch the switch set 70. The remote controller 400 allows the user to easily operate the platform 2 to rise and fall when the user is on the platform 2. .

In the present invention, as shown in the second figure, the platform 2 is at the highest height, and the distance from the top surface of the platform 2 to the base 6 is smaller than the distance from the top of the holder 30 to the base 6. In this design, the platform 2 is at the highest height. The top surface of the platform 2 is lower than the top of the holder 30 to prevent the platform 2 from interfering with the hand held by the holder 30 during pushing.

As shown in FIG. 14, the present invention is further provided with a screen 700 which is electrically connected to the circuit board 90 of the control group 60 to display the current voltage of the power supply 80 so as to understand the residual power of the power supply 80.

As shown in FIG. 14, the present invention is further provided with a warning light 600. If the power of the power supply 80 is lower than the power supply setting value, the circuit board 90 stops the power supply of the power supply 80 and the warning light 600 emits light. In this embodiment, the power supply setting value is 20% as an example, the residual power of the power supply 80 is reduced to 20% to 28V (volt) as an example, and the power supply 80 is a rechargeable type as an example. When the residual power of the power supply 80 drops to 20% In the following, the warning light 600 lights up, and the power supply 80 stops supplying power to prevent over-discharge from affecting the battery life.

The present invention is as shown in Figure 13, where the platform 2 of the lifting group 1 is further provided with a drawer 500 for storing tools. The drawer 500 can store a list of goods, a measuring ruler, hand tools and other tools for easy movement. It is also convenient to pick and place the tools commonly used in the work at 200 hours.

1: Lifting group

2: platform

25: curved board

3: The first bracket group

4: The second bracket group

5: Extension bracket

6: Base

63: Base slide

64: Base opening

65: Outer peripheral surface

7: Hydraulic rod

71: connecting hole

9: The second link

10: Pump

20: Hydraulic pipe

30: Grip frame

40: Wheel

401: Stopper

4011: Card

50: Anti-pinch sensor

60: control group

70: switch group

Claims (7)

An electric lifting trolley comprising: a platform including a platform front part and a platform rear part; the two sides of the rear part of the platform each have a platform slide rail; the bottom surface of the rear part of the platform is provided with two platform openings, and the two platform openings are respectively Connected with each platform slide rail; a base, the bottom of which is provided with a plurality of wheels, wherein the base includes a base front part and a base rear part, the base rear part has a base slide rail on each side, and the top surface of the base rear part is provided with a base slide rail. Two base openings, the two base openings are respectively connected with the base slide rails, one end of the base is provided with a holder, and the grip holder is provided with a switch group; a first connecting rod whose two ends are respectively slidably arranged on the two platform slide rails; A first bracket group and a second bracket group are respectively pivoted between the platform and the base, wherein the first bracket group includes a first bracket and a second bracket, and the second bracket group includes a first bracket Three brackets and a fourth bracket, the first bracket and the second bracket are located on the same side and cross each other and are pivotally connected to each other at the intersection to form a first pivoting portion, the third bracket and the fourth bracket are located on the same side Cross each other and are pivotally connected to each other at the intersection to form a second pivotal joint. The first bracket is at the lower section of the first pivotal section as the lower section of the first bracket, and the third bracket is at the lower section of the second pivotal section. The lower section of the third bracket, the lower section of the first bracket and the lower section of the third bracket each extend an extension bracket in the direction of the base, a second link is pivoted between the two extension brackets, the first bracket group and the The second bracket group is respectively disposed on each platform slide rail and each base slide rail through the two platform openings and the two base openings; wherein one end of each of the first support and the third support is pivoted with the two ends of the front of the platform, respectively And the other ends of each of the first bracket and the third bracket are slidably disposed on the two bases. One end of each of the second bracket and the fourth bracket is pivotally connected to the two ends of the front part of the base, and the other end of each of the second bracket and the fourth bracket is slidably disposed on the two base slide rails. It is pivoted at two ends of the first link, the base is frame-shaped, and when the platform is at the lowest height, the second link and the extension bracket partially extend below the base; wherein the first link and the first link An oil pressure rod is connected between the two connecting rods, and the oil pressure rod is connected to a pump. When the platform is at the lowest height, the oil pressure rod has the shortest length and partially extends below the base with the second connecting rod; And a control group, which includes a power supply and a circuit board. The switch group, the power supply and the pump are all electrically connected to the circuit board. The control group makes the pump operate so that the hydraulic rod expands and stops. , So that the hydraulic rod drives the first bracket group and the second bracket group to stop during the unfolding position to the collapsed position, prompting the platform to rise, descend and stop during the process relative to the base. The electric lifting trolley described in item 1 of the scope of patent application, wherein the top of the grip frame has a grip portion, the switch is arranged on the grip portion, wherein the platform is located at the highest height, and the top surface of the platform is at the top of the base The distance is less than the distance from the top of the holder to the base. For the electric lifting trolley described in item 1 of the scope of patent application, an arc-shaped arc plate extends downwards around the platform, the base has an outer peripheral surface, the platform is located at the lowest height, and the outer peripheral surface of the base is partially covered with the The curved board of the platform, wherein the platform of the lifting group is further provided with a drawer for storing tools. The electric lifting trolley described in item 1 of the scope of patent application, wherein the lifting group is further provided with at least one anti-pinch sensor, the anti-pinch sensor is electrically connected to the circuit board, and the anti-pinch sensor is arranged on the base Any position at the top of the platform, any position at the bottom of the platform, the first Any position of the bracket group, any position of the second bracket group or any combination of the above positions, if the anti-pinch sensor is triggered while the platform is descending, the platform stops descending or the platform rises. For the electric lifting trolley described in item 1 of the scope of patent application, wherein the plurality of wheels are respectively further provided with a stopper, the respective stoppers of the plurality of wheels are respectively provided with a clamping member, and any stopper activates the The clip is fastened to the corresponding wheel surface, so that the corresponding wheel cannot roll on the ground. For example, the electric lifting trolley described in item 1 of the scope of patent application further includes a remote controller, the control group is located at the base of the lifting group, and the control group is further provided with a wireless sensor, and the wireless sensor is electrically connected to the circuit board. The control group receives the wireless control signal of the remote controller through the wireless sensor, so that the platform of the lifting group is raised, stopped and lowered. For example, the electric lifting trolley described in item 1 of the scope of patent application is further provided with a screen which is electrically connected to the circuit board of the control group to display the current voltage of the power supply, and is further provided with a warning light that the power of the power supply is low At the power supply setting value, the circuit board stops the power supply and the warning light emits light.

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