TW202421480A - Ladder car structure - Google Patents

Abstract

A ladder car structure according to the present invention comprises: a base with a handle at one end; a carrier plate pivotally connected to the other end of the base; a transmission mechanism with a track assembly, one end of the transmission mechanism pivotally connected to the base, and the other end Relative to the swing of the base, the track assembly can be driven to rotate; a link mechanism has a support arm and a connecting arm, one end of the supporting arm is connected to the base, the other end is pivotally connected to one end of the connecting arm, and the connecting The other end of the arm is connected to the transmission mechanism, and the connecting arm can be operated to link the support arm, so as to adjust the base and the transmission mechanism to maintain a predetermined pivot angle θ; a power device is installed on the transmission mechanism to provide power source to the crawler assembly, and control the crawler assembly to move up or down along the steps of a staircase; the transmission mechanism can take the base and the carrier board up and down the stairs together, The link mechanism enables the base to adjust its inclination angle relative to the transmission mechanism in response to stairs with different step heights.

Description

Ladder car structure

The present invention relates to a ladder trolley structure, and more particularly to a ladder trolley structure whose inclination can be adjusted to match stairs of different step heights and provide a stable load.

Generally, heavy objects can be moved by using appropriate machines, such as a wheelbarrow. However, with the development of urbanization, bungalows have gradually developed into high-rise buildings, which in turn increases the demand for moving up and down. When the moving locations are on different floors, walking up and down stairs is a very troublesome thing. Therefore, there is a wheelbarrow that can climb stairs, which is equipped with three wheels on each side so that the wheelbarrow can climb stairs. However, the wheelbarrow that can climb stairs is towed by hand to climb the stairs together with the heavy objects. The wheelbarrow cannot move by itself, and it is still laborious and inconvenient to use. It is more likely to cause waist and leg injuries during the force application process. Therefore, an electric ladder car is introduced, which uses a rotating track to move objects up and down the stairs, achieving the purpose of saving trouble and effort.

However, stairs have different step heights. When carrying heavy goods up the stairs, the user needs to use his hands to control it to prevent the heavy objects from tipping forward or the center of gravity from being unstable and causing the vehicle to overturn. When going down the stairs, it is necessary to avoid the acceleration of gravity causing the electric ladder vehicle to lose control and slide down directly. Therefore, the controllability and safety of the electric ladder vehicle during operation are very important.

The purpose of the present invention is to provide a ladder trolley structure which can match stairs with different step heights, adjust the inclination of the ladder trolley, and provide a stable bearing effect.

In order to achieve the above-mentioned purpose and effect, the present invention discloses a ladder vehicle structure, which includes: a base, one end of which is provided with a handle; a carrier plate, pivotally connected to the other end of the base opposite to the handle, capable of supporting objects; a transmission mechanism, having a track assembly, one end of which is pivotally connected to the base and the other end of which can swing relative to the base, the transmission mechanism is located on the opposite side of the carrier plate, and the drive motor is used to drive the track assembly to rotate; a connecting rod mechanism, having a support arm and a connecting arm, one end of the support arm is connected to the base and the other end is connected to the base. One end is hinged with one end of the connecting arm, and the other end of the connecting arm is connected to the transmission mechanism. The connecting arm can be operated to link the support arm so that the base and the transmission mechanism are kept in a state of clamping a predetermined hinge clamping angle θ; a power device is installed on the transmission mechanism to provide a power source to the crawler assembly and control the crawler assembly to move up or down along the steps of a floor; wherein the transmission mechanism can take the base and the carrier plate up and down the stairs, and the connecting rod mechanism enables the base to adjust its tilt angle relative to the transmission mechanism according to the stairs of different step heights, so that the goods can be stably transported up and down the stairs.

In one embodiment, the transmission mechanism has a base frame, one end of which is pivotally connected to the base and the other end can rotate relative to the base. The base frame is located on the opposite side of the carrier plate, the power device is installed on the base frame, and the track assembly has at least one track that is arranged on the base frame and rotates around the outer periphery of the base frame.

In one embodiment, the base is configured as a long frame body, having two long frame rods and a plurality of short frame rods, the long frame rod having a first end and a second end, two rollers being disposed on two sides of the first end of the long frame rod, and the handle being connected to the second end of the long frame rod; the base frame having two vertical rods disposed in parallel, the two vertical rods being connected by a plurality of cross rods, the vertical rod having a first The first end and the second end are located at two ends corresponding to the vertical rod; the crawler assembly of the transmission mechanism includes two first rotating wheels, two second rotating wheels and two crawlers, the two first rotating wheels are coaxially pivoted at the first ends of the two vertical rods, the two second rotating wheels are respectively pivoted at the second ends of the two vertical rods, and the two crawlers are respectively sleeved The first rotating wheel and the second rotating wheel on the vertical rod; the connecting rod mechanism has two supporting arms and two connecting arms, a first pivot rod, a second pivot rod, two slide grooves and a plurality of positioning holes, the two slide grooves and the plurality of positioning holes are respectively arranged on the opposite sides of the two vertical rods, the plurality of positioning holes are individually connected to the slide grooves, one end of the two supporting arms is respectively pivoted on the bottom On the opposite side of the two long frame rods of the seat, the other end of the two supporting arms and one end of the two connecting arms are connected by the first pivot rod, and the two ends of the first pivot rod extend into the two slide grooves respectively and can slide therein, and the second pivot rod passes through the other end of the two connecting arms at the same time, and the two ends of the second pivot rod can be respectively embedded in any of the positioning holes for positioning.

In one embodiment, the vertical rod is provided with two long holes on both sides of the second end, and two fixed housings are provided on the outer sides of the two long holes. The two second rotating wheels each have a spindle, and each spindle is provided with at least one screw hole passing through its diameter. Each spindle of each second rotating wheel passes through each long hole in the transverse direction and can be displaced in each long hole. Each fixed housing has An inner space is provided with a through hole at one end thereof to communicate with the inner space, at least one adjusting bolt can extend from the through hole of the fixed housing into the inner space and be screwed with the at least one screw hole, and rotating the at least one adjusting bolt can drive the second rotating wheel to move in the long hole, thereby changing the distance between the second rotating wheel and the first rotating wheel, and adjusting the tightness of the track.

In one embodiment, the carrier is a planar plate having two side panels, and the two side panels are hinged to the first ends of the two long frame rods of the base, and the other end of the carrier can be rotated relative to the base to be unfolded or folded.

In one embodiment, the carrier plate is a concave arc-shaped plate body, which is fixed on one of the short frame rods of the base close to the first end of the long frame rod. The carrier plate is also provided with a hook piece, which is roughly a U-shaped piece. The concave arc-shaped plate body is used to support the barrel body of a gas tank, and the hook piece hooks the bottom edge of the gas tank.

In one embodiment, the handle is a U-shaped frame rod corresponding to the second end of the two long frame rods of the base, and by operating the tightening and loosening of a quick-release assembly, the handle can be controlled to swing and extend to be grasped by the user's hand, or to swing and retract to be merged with the transmission mechanism.

In one embodiment, the power device has a control switch electrically connected to the power device, and the control switch controls the crawler to go up or down the stairs.

The following is a detailed description of the preferred embodiments of the present invention according to the purpose and effect of the present invention with reference to the drawings.

The following drawings are used to illustrate the preferred embodiments of the present invention. It should be understood that the drawings and descriptions are for illustration only and are not intended to limit the present invention. In addition, the terms "left" and "right", "inside" and "outside", "upper" and "lower" described in the specification are used to clearly illustrate relative positions and are not intended to be limiting.

Please refer to FIGS. 1 and 2 , which disclose a ladder vehicle structure, including a base 10 , a carrier plate 20 , a transmission mechanism 30 , a connecting rod mechanism 40 and a power device 50 .

The base 10 has a handle 11 at one end.

The carrier plate 20 is pivotally connected to the other end of the base 10 opposite to the handle 11 and can be used to hold items.

The transmission mechanism 30 has a track assembly 32. One end of the transmission mechanism 30 is pivotally connected to the base 10, and the other end can be swung relative to the base 10. The transmission mechanism 30 is located on the opposite side of the carrier plate 20, and the track assembly 32 can be driven to rotate.

The connecting rod mechanism 40 has a supporting arm 41 and a connecting arm 42. One end of the supporting arm 41 is connected to the base 10, and the other end is hinged to one end of the connecting arm 42. The other end of the connecting arm 42 is connected to the transmission mechanism 30. The connecting arm 42 can be operated to link the supporting arm 41 so that the base 10 and the transmission mechanism 30 are maintained in a state of clamping a predetermined hinge angle θ.

The power device 50 is mounted on the transmission mechanism 30 to provide a power source to the track assembly 32 and control the track assembly 32 to move upward or downward along the steps of the first floor f.

In this embodiment, the base 10 is configured as a long frame, having two long frame rods 12 and four short frame rods 13. The long frame rod 12 has a first end n1 and a second end n2. Two rollers 14 are disposed on both sides of the first end n1 of the long frame rod 12. The handle 11 is connected to the second end n2 of the long frame rod 12.

The transmission mechanism 30 has a base frame 33, one end of which is pivotally connected to the base 10 and the other end of which can be swung relative to the base 10. The base frame 33 is located on the opposite side of the carrier 20 and has two parallel vertical rods 331. The two vertical rods 331 are connected by two cross rods 332. The vertical rod 331 has a first end n3 and a second end n4. The first end n3 and the second end n4 are located at two ends corresponding to the vertical rod 331. The crawler assembly 32 includes two first The rotating wheel 321, the two second rotating wheels 322 and the two tracks 323, the two first rotating wheels 321 are coaxially pivoted at the first end n3 of the two vertical rods 331, and the two second rotating wheels 322 are respectively pivoted at the second end n4 of the two vertical rods 331, and the two tracks 323 are respectively sleeved on the first rotating wheel 321 and the second rotating wheel 322 on the two vertical rods 331, and the two tracks 323 are set on the base frame 33 and each rotates around the outer periphery of the two vertical rods 331.

The connecting rod mechanism 40 comprises two supporting arms 41 and two connecting arms 42, a first pivot rod 43, a second pivot rod 44, two slide grooves 45 and a plurality of positioning holes 46a, 46b, 46c, 46d. The two slide grooves 45 and the plurality of positioning holes 46a, 46b, 46c, 46d are respectively located on the opposite side of the two vertical rods 331. The plurality of positioning holes 46a, 46b, 46c, 46d are respectively connected to the slide grooves 45. One end of the two supporting arms 41 is pivoted. The two ends of the two supporting arms 41 and one end of the two connecting arms 42 are connected by the first pivot rod 43 on the opposite sides of the two long frame rods 12 of the base 10. The two ends of the first pivot rod 43 extend into the two slide grooves 45 and can slide in the two slide grooves 45. The second pivot rod 44 passes through the other ends of the two connecting arms 42 at the same time. The two ends of the second pivot rod 44 can be respectively embedded in any of the positioning holes 46a, 46b, 46c, 46d for positioning.

The carrier 20 is a planar plate 21 having two side panels 22 (see FIG. 7 ), and the two side panels 22 are pivotally connected to the first ends n1 of the two long frame rods 12 of the base 10 so that the other end of the carrier 20 can be rotated relative to the base 10 to be expanded or folded. The direction in which the carrier 20 is expanded is opposite to the direction in which the transmission mechanism 30 is rotated to expand.

Please refer to Figure 8, which is another preferred embodiment of the carrier 20. The carrier 20 has a concave arc-shaped plate body 23, and the concave arc-shaped plate body 23 is fixedly mounted on one of the short frame rods 13 of the base 10 close to the first end n1 of the long frame rod 12. The carrier 20 is also provided with a hook piece 24, and the hook piece 24 is generally a U-shaped plate body. The concave arc-shaped plate body 23 is used to receive the barrel of a gas tank, and the hook piece 24 can hook the bottom edge of the gas tank to provide a more stable support for the gas tank.

The handle 11 is a U-shaped frame rod corresponding to the second end n2 of the two long frame rods 12 of the base 10, and by operating the tightening and loosening of a quick release assembly 15, the handle 11 can be controlled to swing and extend to be grasped by the user's hand, or to swing and retract to be merged with the transmission mechanism 30 (as shown in Figures 1 and 2).

The power device 50 further has a control switch 51 which is electrically connected to the crawler track assembly 32. The control switch 51 controls the crawler track 323 to go up or down the stairs.

Please refer to Figures 1 and 3. According to the structure of the ladder vehicle of the present invention, when not in use, the second pivot rod 44 of the connecting rod mechanism is pushed, and the supporting arm 41 is driven by the connecting arm 42 to swing downward, and the first pivot rod 43 moves to the bottom of the slide groove 43, and the second pivot rod 44 is embedded in the positioning hole 46a. At this time, the transmission mechanism 30 and the bottom are in contact. The hinge angle θ between the bases 10 is close to 0 degrees, the carrier plate 20 is folded and rotated toward the base 10, and the quick release assembly 15 of the handle 11 is operated and released, so that the handle 11 is also folded and rotated toward the base 10 to be folded together with the transmission mechanism 30. In this way, the overall volume of the structure of the ladder vehicle of the invention can be reduced, which is convenient for storage.

Please refer to Figures 2 and 4. When using the ladder vehicle structure of the present invention, (a) first push the second pivot rod 44 of the connecting rod mechanism 40 to leave the positioning hole 46a, (b) then use the second pivot rod 44 to drive the first pivot rod 43 to move in the slide groove 45. At this time, the connecting arm 42 drives the supporting arm 41 to swing upward to prop up the base 10. Then, (c) adjust the pivot angle θ between the base 10 and the transmission mechanism 30, and the second pivot rod 44 can finally be selectively embedded in one of the positioning holes 46b, 46c, 46d for positioning.

Please refer to Figure 5A. In this embodiment, the second pivot rod 44 is embedded in the positioning hole 46d for positioning. The pivot angle θ between the transmission mechanism 30 and the base 10 is about 15 degrees. The user can hold the handle 11 and operate the control switch 51 of the power device 50 to drive the first rotating wheel 321 and the second rotating wheel 322 to drive the track 323 to rotate. The transmission mechanism 30 carries the base 10, the carrier 20 and an object w placed on the carrier 20 to go up and down the stairs, so as to transport the object w to different floors, which is convenient and labor-saving.

Please refer to FIG. 5B. When the step height of the stair f is higher, the inclination angle of the base 10 can be appropriately lowered. Since the crawler 323 of the transmission mechanism 30 is attached to the stair f, the inclination angle of the base 10 relative to the transmission mechanism 30, that is, the inclination angle of the base 10 relative to the stair f, the connecting rod mechanism 40 of the present invention can adjust and change the hinge angle θ between the base 10 and the transmission mechanism 30 according to the stair height of different stair f (that is, the inclination angle of the stair f), and the transmission mechanism 30 and the stair f can be connected. The hinge angle θ between the bases 10 is reduced in operation according to the aforementioned steps (a)→(b)→(c). By pushing the second hinge rod 44 of the transmission mechanism 30 away from the positioning hole 46d, the support arm 41 is rotated, and the second hinge rod 44 is then inserted into any one of the positioning holes 46b, 46c, 46d for positioning. Since the hinge angle θ of the base 10 relative to the transmission mechanism 30 becomes smaller, the center of gravity of the object w supported on the carrier 20 and the base 10 can be lowered, and the center of gravity is stable when going up and down the stairs, and the operation is safer.

The structure of the ladder trolley of the present invention can be adjusted to match the inclination angle of stairs f with different step heights because the hinge angle θ of the base 10 relative to the transmission mechanism 30 is adjustable. The structure of the ladder trolley of the present invention can stably carry and transport goods for going up and down stairs.

In addition, please refer to Figures 6A and 6B. The two vertical rods 331 are provided with two long holes 333 on the two sides of the second end n4. Two fixed housings 334 are provided on the outer sides of the two long holes 333. The two ends of the axles 3221 of the two second rotating wheels 322 are provided with two screw holes 3222 passing through the axles 3221. The axles 3221 of the second rotating wheels 322 pass through the two long holes 333 of the two vertical rods 331 in a horizontal direction. The axles 3221 of the second rotating wheels 322 can be displaced in the long holes 333. The fixed housings 334 have an inner space 3341 and a fixed housing 334. A through hole 3342 is provided at the end thereof to communicate with the internal space 3341. An adjusting bolt 335 can be inserted into the through hole 3342 of the fixed housing 334 and screwed into the screw hole 3222 of the axle 3221 of the second rotating wheel 322. Rotating the adjusting bolt 335 can drive the axle 3221 of the second rotating wheel 322 to move in the long hole 333. When the track 323 becomes loose, the distance between the second rotating wheel 322 and the first rotating wheel 321 can be changed by adjusting the adjusting bolt 335, so that the track 323 becomes tighter, thereby achieving the purpose of being able to adjust the tightness of the track 323.

The above are the preferred embodiments and design drawings of the present invention, but the preferred embodiments and design drawings are only illustrative and are not used to limit the scope of rights of the present invention. Any implementation by equivalent technical means or within the scope of rights covered by the following "Scope of Patent Application" does not deviate from the scope of the present invention and is the scope of rights of the applicant.

10: base 11: handle 12: long frame rod 13: short frame rod 14: roller n1: first end n2: second end 15: quick release assembly 20: carrier plate     21: flat plate 22: side piece     23: concave arc plate 24: hook piece     30: transmission mechanism 32: track assembly 321: first rotating wheel 322: second rotating wheel 3221: spindle 3222: screw hole 323: track 33: base frame 331: vertical rod n3: first end n4: second end 332: horizontal rod   333: long hole 334: fixed shell 3341: internal space 3342: through hole 335: adjustment bolt 40: Linkage mechanism 41: Support arm 42: Connecting arm 43: First pivot rod 44: Second pivot rod 45: Slide 46a, 46b, 46c, 46d: Positioning hole 50: Power device 51: Control switch f: Staircase w: Object

Figure 1 is a schematic diagram of the three-dimensional appearance of a ladder trolley structure in a folded state according to a preferred embodiment of the present invention. Figure 2 is a schematic diagram of the three-dimensional appearance of a ladder trolley structure in an opened state according to a preferred embodiment of the present invention. Figure 3 is a schematic diagram of the side view of the base and the transmission mechanism in Figure 1 when they are in a folded state. Figure 4 is a schematic diagram of the plane movement of the base and the transmission mechanism in Figure 2. Figures 5A and 5B are schematic diagrams of the use of a ladder trolley structure in a preferred embodiment of the present invention to adjust the tilt angle in coordination with stairs of different step heights. Figures 6A and 6B are partial cross-sectional schematic diagrams of the ladder trolley structure in a preferred embodiment of the present invention for adjusting the tightness of the crawler track. Figure 7 is a schematic cross-sectional diagram of the loading plate in Figure 1. FIG8 is a three-dimensional schematic diagram of another preferred embodiment of the ladder vehicle structure of the present invention showing another form of loading plate.

10: Base

11:Handle

12: Long frame rod

13: Short frame rod

14: Scroll wheel

n1: first end

n2: Second end

15: Quick release assembly

20: Carrier board

21: Planar plate

30: Transmission mechanism

32: Track assembly

321: First rotating wheel

322: Second rotating wheel

323: Tracks

33: Base frame

331: Vertical pole

332: horizontal bar

n3: First end

n4: Second end

334:Fixed housing

40: Connecting rod mechanism

41: Support arm

42: Connecting arm

43: First pivot rod

44: Second pivot rod

45: Chute

46a, 46b, 46c, 46d: Positioning holes

50: Power device

51: Control switch

Claims (8)

A ladder vehicle structure includes: A base, one end of which is provided with a handle; A carrier plate, pivoted to the other end of the base opposite to the handle, capable of supporting items; A transmission mechanism, having a track assembly, one end of which is pivoted to the base and the other end of which can swing relative to the base, the transmission mechanism is located on the opposite side of the carrier plate, and the track assembly can be driven to rotate; A connecting rod mechanism, having a support arm and a connecting arm, one end of which is connected to the base and the other end is pivoted to one end of the connecting arm, and the other end of the connecting arm is connected to the transmission mechanism, and the support arm can be linked by operating the connecting arm, so that the base and the transmission mechanism are kept in a state of clamping a predetermined pivot clamping angle θ; A power device is installed on the transmission mechanism to provide a power source to the crawler assembly and control the crawler assembly to move up or down along the stairs of a floor; Wherein, the transmission mechanism can take the base and the carrier up and down the stairs together, and the connecting rod mechanism enables the base to adjust its tilt angle relative to the transmission mechanism according to stairs of different step heights, so that objects can be transported up and down the stairs stably. A ladder vehicle structure as described in claim 1, wherein the transmission mechanism has a base frame, one end of the base frame is pivotally connected to the base, and the other end can rotate relative to the base, the base frame is located on the opposite side of the carrier plate, the power device is installed on the base frame, and the track assembly has at least one track that is arranged on the base frame and rotates around the outer periphery of the base frame. The structure of the ladder vehicle as described in claim 2, wherein the base is configured as a long frame frame, having two long frame rods and a plurality of short frame rods, the long frame rod having a first end and a second end, two rollers being disposed on both sides of the first end of the long frame rod, and the handle being connected to the second end of the long frame rod; the base frame having two vertical rods disposed in parallel, the two vertical rods being connected by a plurality of cross rods, the vertical The rod has a first end and a second end, and the first end and the second end are located at two ends corresponding to the vertical rod; the track assembly of the transmission mechanism includes two first rotating wheels, two second rotating wheels and two tracks, the two first rotating wheels are coaxially pivoted at the first ends of the two vertical rods, the two second rotating wheels are respectively pivoted at the second ends of the two vertical rods, and the two tracks are respectively The first rotating wheel and the second rotating wheel on the vertical rod are respectively mounted; the connecting rod mechanism has two supporting arms and two connecting arms, a first pivot rod, a second pivot rod, two slide grooves and a plurality of positioning holes, the two slide grooves and the plurality of positioning holes are respectively arranged on opposite sides of the two vertical rods, the plurality of positioning holes are individually connected to the slide grooves, one end of the two supporting arms is respectively pivoted on On the opposite side of the two long frame rods of the base, the other end of the two supporting arms and one end of the two connecting arms are pivotally connected by the first pivot rod. The two ends of the first pivot rod respectively extend into the two slide grooves and can slide therein. The second pivot rod simultaneously passes through the other end of the two connecting arms. The two ends of the second pivot rod can be respectively embedded in any of the positioning holes for positioning. The ladder vehicle structure as described in claim 3, wherein the vertical rod is provided with two long holes on both sides of the second end, and two fixed housing covers are provided on the outer sides of the two long holes, and the two second rotating wheels each have a central axis, and each central axis is provided with at least one screw hole passing through its diameter, and each central axis of each second rotating wheel passes through each long hole in the transverse direction and can be displaced in each long hole, and each fixed housing cover is provided on the outer sides of the two long holes. The housing has an internal space and a through hole at one end connected to the internal space. At least one adjusting bolt can extend from the through hole of the fixed housing into the internal space and be screwed with the at least one screw hole. Rotating the at least one adjusting bolt can drive the second rotating wheel to move in the long hole, thereby changing the distance between the second rotating wheel and the first rotating wheel, and adjusting the tightness of the track. A ladder vehicle structure as described in claim 3, wherein the carrier is a planar plate having two side panels, the two side panels being hinged to the first ends of the two long frame rods of the base, and the other end of the carrier can be rotated relative to the base to be unfolded or folded. A ladder truck structure as described in claim 3, wherein the carrier plate is a concave arc-shaped plate body, the concave arc-shaped plate body is fixedly mounted on one of the short frame rods of the base close to the first end of the long frame rod, the carrier plate is also provided with a hook piece, the hook piece is generally a U-shaped piece, the concave arc-shaped plate body is used to receive the barrel body of a gas tank, and the hook piece hooks the bottom edge of the gas tank. The structure of the ladder cart as described in claim 3, wherein the handle is a U-shaped frame rod corresponding to the second end of the two long frame rods of the base, and by operating the tightening and loosening of a quick-release assembly, the handle can be controlled to swing and extend to be grasped by the user's hand, or to swing and retract to be merged with the transmission mechanism. A ladder vehicle structure as described in claim 1, wherein the power device has a control switch electrically connected to the power device, and the control switch controls the crawler to perform the action of ascending or descending the stairs.

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