Self-balancing stair climbing cart

Abstract

The self-balancing stair-climbing pulling cart provided by the utility model, which comprises a crawler belt type stair-climbing mechanism with a chassis and a crawler belt, a goods plate arranged above the crawler belt type stair-climbing mechanism, the chassis comprising a crawler belt frame extending forward and backward and a cross beam connected perpendicularly to the inner side wall of the crawler belt frame, the crawler belt being rotatably arranged on the crawler belt frame, and the goods plate extending in the forward and backward direction; a horizontal sensor is arranged at the front bottom of the goods plate, the rear end of the goods plate is rotatably connected to the crawler belt frame, the self-balancing stair-climbing pulling cart further comprises an electric push rod arranged between the cross beam and the goods plate, one end of the electric push rod is rotatably connected to the cross beam, the other end of the electric push rod is rotatably connected to the front end of the bottom of the goods plate, the controller of the electric push rod is signal-connected to the horizontal sensor, and the extension length is controlled according to the horizontal signal detected by the horizontal sensor; when climbing stairs, the rotation amplitude of the goods plate can be adjusted in real time according to the inclination of the stairs, the goods plate can be kept horizontal, self-balancing is realized, and the safety is better.

Description

Technical Field

[0001] This utility model belongs to the field of cargo truck technology, specifically relating to a self-balancing stair-climbing cargo truck. Background Technology

[0002] Cargo carts are common equipment for moving goods. Most existing cargo carts have rollers around the bottom of the cargo platform, and the cart is moved by push rods or ropes connected to the cargo platform. These cargo carts are not suitable for moving goods that need to be carried through stairs, and their application range is relatively narrow.

[0003] To address this issue, stair-climbing tractors have emerged on the market that incorporate the tracked stair-climbing mechanism of a stair-climbing wheelchair under the cargo pallet to drive it up the stairs. However, when these tractors are climbing stairs, the cargo pallet's posture cannot be adjusted accordingly, and it is actually tilted. When the tilt angle is too large, the goods placed on the cargo pallet are prone to slipping or tipping over, posing a safety hazard. Utility Model Content

[0004] The purpose of this invention is to overcome one or more shortcomings in the prior art and provide a self-balancing stair-climbing hauling truck.

[0005] To achieve the above objectives, the technical solution provided by this utility model is a self-balancing stair-climbing hauling truck, comprising:

[0006] A tracked stair-climbing mechanism has a chassis and tracks. The chassis includes a track frame extending forward and backward and a crossbeam vertically connected to the inner wall of the track frame. The tracks are rotatably mounted on the track frame.

[0007] A cargo pallet is positioned above the tracked stair-climbing mechanism and extends in the front-to-back direction;

[0008] A level sensor is installed at the front bottom of the cargo platform, and the rear end of the cargo platform is rotatably connected to the track frame. The self-balancing stair-climbing cargo vehicle also includes an electric push rod located between the crossbeam and the cargo platform. One end of the electric push rod is rotatably connected to the crossbeam, and the other end is rotatably connected to the bottom front end of the cargo platform. The controller of the electric push rod is connected to the level sensor signal and controls the extension length according to the level signal detected by the level sensor. When climbing stairs, the rotation amplitude of the cargo platform can be adjusted in real time according to the inclination of the stairs to keep the cargo platform level and achieve self-balancing, thereby avoiding the phenomenon of goods slipping or tipping over, and improving safety.

[0009] Preferably, the cargo platform includes a support frame and a support plate connected to the support frame. The rear ends of the support frame extend rearward to form extension sections on both sides. The chassis also includes an upper ear plate connected to the outer side wall of the track frame and extending upward. The rear end of the extension section is rotatably connected to the upper end of the upper ear plate.

[0010] More preferably, the root of the extension section is vertically connected to a downwardly extending lower ear plate, and the lower end of the lower ear plate is rotatably connected to a support wheel; the front end of the support frame is vertically connected to a downwardly extending support foot block, and the support foot block is located behind the horizontal sensor.

[0011] More preferably, the middle of the extension section is vertically connected to an upwardly extending pole seat, and the front side of the pole seat is provided with a U-shaped groove. The self-balancing stair-climbing trolley also includes a main frame rod extending in the vertical direction. At least a portion of the lower end of the main frame rod is inserted into the U-shaped groove and rotatably connected to the pole seat. When not in use, the main frame rod can rotate forward relative to the pole seat and fit against the support plate to achieve folding.

[0012] More preferably, a baffle is connected between the main frame rods, the front surface of the baffle is flush with the front side of the main frame rod, and the rear surface of the baffle is used to install the power supply and the electrical control box of the tracked stair climbing mechanism. The power supply is used to supply power to the motor of the tracked stair climbing wheelchair and the electric push rod. The electrical control box and the power supply are spaced apart in the left-right direction.

[0013] More preferably, the self-balancing stair-climbing haulage vehicle also includes an inverted U-shaped tie rod, the bottom sides of which are movably inserted into the main frame rod, and a controller for controlling the tracked stair-climbing mechanism and the electric push rod is provided at the top center of the tie rod.

[0014] More preferably, the main frame rod is provided with a pull rod locking mechanism for locking the relative position of the pull rod and the main frame rod. The pull rod locking mechanism includes a through hole opened in the side wall of the main frame rod, a retaining pin movably inserted in the through hole, a compression spring for driving the retaining pin to move inward to the main frame rod, and an unlocking crossbar. The two ends of the unlocking crossbar are connected to the ends of the retaining pin away from the main frame rod.

[0015] More preferably, the self-balancing stair-climbing trolley also includes a push handle assembly, which includes a push handle seat and a push handle. The push handle seat is connected to the side wall of the main frame pole, and one end of the push handle is rotatably inserted into the push handle seat. The push handle has a working position and a folded position. When the push handle is in the working position, the other end of the push handle extends backward. When the push handle is in the folded position, the other end of the push handle extends downward and fits against the main frame pole.

[0016] More preferably, the push handle assembly further includes a push handle locking mechanism for locking the push handle in the working state. The push handle locking mechanism includes a locking plate rotatably disposed in the push handle seat and a torsion spring sleeved on the rotation shaft of the locking plate. One end of the locking plate is bent to form a locking protrusion, and the other end extends outward from the push handle seat. The locking protrusion matches a locking groove opened on the end of the push handle located in the push handle seat. When the locking protrusion is inserted into the locking groove, the push handle locking mechanism locks. The torsion spring has a tendency to drive the locking plate to rotate, so that the locking protrusion is inserted into the locking groove.

[0017] Preferably, the track frame includes a straight section located at the front and middle and an inclined end located at the rear and extending backward and upward. The crossbeam includes a front crossbeam connected to the inner wall of the front end of the straight section, a rear crossbeam connected to the inner wall of the inclined section, and a support beam connected to the inner wall of the middle section of the straight section. The rear end of the electric push rod is rotatably connected to the middle position of the support beam.

[0018] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0019] The self-balancing stair-climbing cargo truck provided by this utility model includes a tracked stair-climbing mechanism with a chassis and tracks, and a cargo plate disposed above the tracked stair-climbing mechanism. The chassis includes a track frame extending forward and backward and a crossbeam vertically connected to the inner side wall of the track frame. The tracks are rotatably mounted on the track frame, and the cargo plate extends in the forward and backward direction. By setting a level sensor at the front bottom of the cargo plate, the rear end of the cargo plate is rotatably connected to the track frame. The self-balancing stair-climbing cargo truck also includes an electric push rod disposed between the crossbeam and the cargo plate. One end of the electric push rod is rotatably connected to the crossbeam, and the other end of the electric push rod is rotatably connected to the bottom front end of the cargo plate. The controller of the electric push rod is connected to the level sensor signal and controls the extension length according to the level signal detected by the level sensor. When climbing stairs, the rotation amplitude of the cargo plate can be adjusted in real time according to the inclination of the stairs to keep the cargo plate horizontal and achieve self-balancing, thereby avoiding the phenomenon of goods slipping or tipping over, and improving safety. Attached Figure Description

[0020] Figure 1 This is a perspective view of a preferred embodiment of the present invention.

[0021] Figure 2 yes Figure 1 Front view diagram.

[0022] Figure 3 yes Figure 2 Cross-sectional view along the AA direction.

[0023] Figure 4yes Figure 2 Cross-sectional view along the BB direction.

[0024] Figure 5 yes Figure 2 Cross-sectional view along the CC direction.

[0025] Figure 6 yes Figure 2 A three-dimensional schematic diagram of the main frame rod, push rod, and push handle.

[0026] Among them: 10. Tracked stair-climbing mechanism; 111. Track frame; 112. Straight section; 113. Inclined end; 114. Front crossbeam; 115. Rear crossbeam; 116. Support beam; 12. Track; 13. Upper ear plate; 14. Motor; 20. Cargo plate; 21. Horizontal sensor; 22. Support frame; 221. Extension section; 222. Lower ear plate; 223. Support wheel; 224. Support foot block; 22 5. Rod seat; 226. U-shaped groove; 23. Support plate; 30. Electric push rod; 40. Main frame rod; 41. Baffle; 411. Power supply; 412. Electrical control box; 50. Pull rod; 51. Controller; 61. Through hole; 62. Clamping pin; 63. Compression spring; 64. Unlocking crossbar; 71. Push handle seat; 72. Push handle; 721. Locking groove; 73. Locking plate; 731. Locking protrusion; 74. Torsion spring. Detailed Implementation

[0027] like Figures 1 to 6As shown, the self-balancing stair-climbing cargo truck provided by this utility model includes: a tracked stair-climbing mechanism 10 and a cargo plate 20. The tracked stair-climbing mechanism 10 has a chassis and tracks 12. The chassis includes a track frame 111 extending forward and backward, and a crossbeam vertically connected to the inner wall of the track frame 111. The track frame 111 includes a straight section 112 located at the front and middle, and an inclined end 113 located at the rear and extending backward and upward. The crossbeam includes a front crossbeam 114 connected to the inner wall of the front end of the straight section 112, a rear crossbeam 115 connected to the inner wall of the inclined section 113, and a support beam 116 connected to the inner wall of the middle section of the straight section 112. The tracks 12 are rotatably mounted on the track frame 111. The cargo plate 20 is located above the tracked stair-climbing mechanism 10 and extends along... Extending in the front and rear directions, the cargo plate 20 is equipped with a level sensor 21 at its front bottom. The rear end of the cargo plate 20 is rotatably connected to the track frame 111. The self-balancing stair-climbing cargo truck also includes an electric push rod 30 located between the crossbeam and the cargo plate 20. The rear end of the electric push rod 30 is rotatably connected to the middle position of the support beam 116, and the front end is rotatably connected to the bottom front end of the cargo plate 20. The controller of the electric push rod 30 is connected to the level sensor 21 and controls the extension length according to the level signal detected by the level sensor 21. When climbing stairs, the self-balancing stair-climbing cargo truck can adjust the rotation amplitude of the cargo plate 20 in real time according to the inclination of the stairs to keep the cargo plate 20 horizontal and achieve self-balancing, thereby avoiding the phenomenon of goods slipping or tipping over, and improving safety.

[0028] In this embodiment, the cargo platform 20 includes a support frame 22 and a support plate 23 connected to the support frame 22. The rear ends of the support frame 22 extend rearward to form extension sections 221. The chassis also includes an upper ear plate 13 connected to the outer side wall of the track frame 111 and extending upward. The rear end of the extension section 221 is rotatably connected to the upper end of the upper ear plate 13. The root of the extension section 221 is vertically connected to a lower ear plate 222 extending downward. The lower end of the lower ear plate 222 is rotatably connected to a support wheel 223. The front end of the support frame 22 is vertically connected to a support foot block 224 extending downward. The support foot block 224 is located behind the horizontal sensor 21 to improve the support effect.

[0029] In this embodiment, the middle of the extension section 221 is vertically connected to an upwardly extending rod seat 225. The front side of the rod seat 225 is provided with a U-shaped groove 226. The self-balancing stair-climbing trolley also includes a main frame rod 40 extending in the vertical direction. The rear part of the lower end of the main frame rod 40 is inserted into the U-shaped groove 226 and rotatably connected to the rod seat 225. When not in use, the main frame rod 40 can rotate forward relative to the rod seat 225 and fit against the support plate 23 to achieve folding.

[0030] In this embodiment, a baffle 41 is connected between the main frame rods 40 on the left and right sides. The front surface of the baffle 41 is flush with the front side of the main frame rod 40. The rear surface of the baffle 41 is used to install the power supply 411 and the electrical control box 412 of the tracked stair climbing mechanism 10. The power supply 411 is used to supply power to the motor 14 and electric push rod 30 of the tracked stair climbing wheelchair 10. The electrical control box 412 and the power supply 411 are spaced apart in the left and right direction.

[0031] For ease of use, in this embodiment, the self-balancing stair-climbing trolley also includes an inverted U-shaped pull rod 50. The bottom sides of the pull rod 50 are movably inserted into the main frame rod 40. A controller 51 for controlling the tracked stair-climbing mechanism 10 and the electric push rod 30 is provided at the top center of the pull rod 50. Furthermore, the main frame rod 40 is provided with a pull rod locking mechanism to lock the relative position of the pull rod 50 and the main frame rod 40. The pull rod locking mechanism includes a through hole 61 opened in the rear side wall of the main frame rod 40, a retaining pin 62 movably inserted in the through hole 61, a compression spring 63 for driving the retaining pin 62 to move inward toward the main frame rod 40, and an unlocking crossbar 64. The unlocking crossbar 64 is located behind the main frame rod 40, and the two ends of the unlocking crossbar 64 are connected to the ends of the retaining pin 62 away from the main frame rod 40.

[0032] Furthermore, the self-balancing stair-climbing trolley also includes a push handle assembly, which includes a push handle seat 71 and a push handle 72. The push handle seat 71 is connected to the side wall of the main frame rod 40. A retaining pin 62 passes through the push handle seat 71. The two ends of a compression spring 63 respectively abut against the annular flange on the retaining pin 62 and the crossbar inside the push handle seat 71. The front end of the push handle 72 is rotatably inserted into the push handle seat 71. The push handle 72 has a working position and a folded position. When the push handle 72 is in the working position, the rear part of the push handle 72 extends vertically backward. When the push handle 72 is in the folded position, the rear end of the push handle 72 extends downward and fits against the main frame rod 40. Further, the push handle assembly... The device also includes a push handle locking mechanism for locking the push handle 72 in the working state. The push handle locking mechanism includes a locking plate 73 rotatably disposed in the push handle seat 71 and a torsion spring 74 sleeved on the rotation shaft of the locking plate 73. The front end of the locking plate 73 is bent downward to form a locking protrusion 731, and the rear end extends backward out of the push handle seat 71. The locking protrusion 731 matches the locking groove 721 opened on the end (front end) of the push handle 72 located in the push handle seat 71. When the locking protrusion 731 is inserted into the locking groove 721, the push handle locking mechanism is locked, and the torsion spring 74 has the tendency to drive the locking plate 73 to rotate, so that the locking protrusion 731 is inserted into the locking groove 721.

[0033] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A self-balancing stair-climbing haulage vehicle, comprising: A tracked stair-climbing mechanism has a chassis and tracks. The chassis includes a track frame extending forward and backward and a crossbeam vertically connected to the inner wall of the track frame. The tracks are rotatably mounted on the track frame. A cargo pallet is positioned above the tracked stair-climbing mechanism and extends in the front-to-back direction; Its features are: A level sensor is provided at the front bottom of the cargo plate, and the rear end of the cargo plate is rotatably connected to the track frame. The self-balancing stair-climbing cargo truck also includes an electric push rod located between the crossbeam and the cargo plate. One end of the electric push rod is rotatably connected to the crossbeam, and the other end is rotatably connected to the bottom front end of the cargo plate. The controller of the electric push rod is connected to the level sensor signal and controls the extension length according to the level signal detected by the level sensor.

2. The self-balancing stair-climbing cargo truck according to claim 1, characterized in that: The cargo platform includes a support frame and a support plate connected to the support frame. The rear ends of the support frame extend rearward to form extension sections on both sides. The chassis also includes an upper ear plate connected to the outer side wall of the track frame and extending upward. The rear end of the extension section is rotatably connected to the upper end of the upper ear plate.

3. The self-balancing stair-climbing haulage vehicle according to claim 2, characterized in that: The root of the extension section is vertically connected to a downwardly extending lower ear plate, and the lower end of the lower ear plate is rotatably connected to a support wheel; the front end of the support frame is vertically connected to a downwardly extending support foot block, which is located behind the horizontal sensor.

4. The self-balancing stair-climbing haulage vehicle according to claim 2, characterized in that: The middle of the extension section is vertically connected to an upwardly extending pole seat. The front side of the pole seat has a U-shaped groove. The self-balancing stair-climbing trolley also includes a main frame rod extending in the vertical direction. At least a portion of the lower end of the main frame rod is inserted into the U-shaped groove and rotatably connected to the pole seat. When not in use, the main frame rod can rotate forward relative to the pole seat and fit against the support plate to achieve folding.

5. The self-balancing stair-climbing haulage vehicle according to claim 4, characterized in that: A baffle is connected between the main frame rods. The front surface of the baffle is flush with the front side of the main frame rod. The rear surface of the baffle is used to install the power supply and the electrical control box of the tracked stair climbing mechanism. The power supply is used to supply power to the motor of the tracked stair climbing wheelchair and the electric push rod. The electrical control box and the power supply are spaced apart in the left-right direction.

6. The self-balancing stair-climbing haulage vehicle according to claim 4, characterized in that: The self-balancing stair-climbing haulage vehicle also includes an inverted U-shaped tie rod. The bottom sides of the tie rod are movably inserted into the main frame rod. A controller for controlling the tracked stair-climbing mechanism and the electric push rod is located at the top center of the tie rod.

7. The self-balancing stair-climbing cargo truck according to claim 6, characterized in that: The main frame is provided with a pull rod locking mechanism for locking the relative position of the pull rod and the main frame. The pull rod locking mechanism includes a through hole opened in the side wall of the main frame, a retaining pin movably inserted in the through hole, a compression spring for driving the retaining pin to move inward to the main frame, and an unlocking crossbar. The two ends of the unlocking crossbar are connected to the ends of the retaining pin away from the main frame.

8. The self-balancing stair-climbing haulage vehicle according to claim 4, characterized in that: The self-balancing stair-climbing trolley also includes a push handle assembly, which includes a push handle seat and a push handle. The push handle seat is connected to the side wall of the main frame pole, and one end of the push handle is rotatably inserted into the push handle seat. The push handle has a working position and a folded position. When the push handle is in the working position, the other end of the push handle extends backward. When the push handle is in the folded position, the other end of the push handle extends downward and fits against the main frame pole.

9. The self-balancing stair-climbing cargo truck according to claim 8, characterized in that: The push handle assembly also includes a push handle locking mechanism for locking the push handle in the working state. The push handle locking mechanism includes a locking plate rotatably disposed in the push handle seat and a torsion spring sleeved on the rotation shaft of the locking plate. One end of the locking plate is bent to form a locking protrusion, and the other end extends outward from the push handle seat. The locking protrusion matches a locking groove opened on the end of the push handle located in the push handle seat. When the locking protrusion is inserted into the locking groove, the push handle locking mechanism locks. The torsion spring has a tendency to drive the locking plate to rotate, so that the locking protrusion is inserted into the locking groove.

10. The self-balancing stair-climbing cargo truck according to claim 1, characterized in that: The track frame includes a straight section at the front and middle and an inclined section at the rear that extends backward and upward. The crossbeam includes a front crossbeam connected to the inner wall of the front end of the straight section, a rear crossbeam connected to the inner wall of the inclined section, and a support beam connected to the inner wall of the middle of the straight section. The rear end of the electric push rod is rotatably connected to the middle position of the support beam.

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