Working method of trundle

Abstract

The invention discloses a working method of a trundle. The working method comprises the steps that firstly, the trundle rotates in the horizontal direction; secondly, the trundles abut against the steps, the trundles stop rotating, and the upper ends of the trundles turn over obliquely and upwards along the abutting positions of the steps under the action of inertia; thirdly, the upper ends of the trundles stop turning over, and rubber wheels of the trundles turn over towards the upper portions of the steps along the abutting positions of the rubber wheels and the steps under the action of inertia; fourthly, the trundles are located at the tops of the steps, and under the action of gravity, the upper ends of the trundles return to the normal running state. The trolley has the advantages that the contact angle is reduced, the resistance is reduced, and the trolley with the trundles can be conveniently pushed to steps.

Description

Technical Field

[0001] This invention relates to the field of caster technology, and particularly to a caster. Background Technology

[0002] Generally speaking, the wheels of a handcart can easily handle small steps and uneven ground. However, as the height difference and ground unevenness increase, the difficulty of the wheels climbing will gradually increase. When the height limit of the wheels is exceeded, it will be impossible to continue climbing.

[0003] As is well known, the larger the wheel diameter, the higher its maximum height. However, if... Figure 1 As shown, when the angle between the wheel and the step reaches about 45 degrees, due to the combined effect of the force, speed and weight of the goods required to push the cart, even if the person pushes the cart with all their might, the wheel will not be able to cross the step. At this time, the wheel will stop turning, the cart cannot continue to move forward, but will bounce vertically and stop. In this case, the cart will be completely unable to cross the step. Summary of the Invention

[0004] The purpose of this invention is to provide a method for using casters that has the advantages of reducing the contact angle, reducing resistance, and making it easier to push a handcart equipped with casters up stairs.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A method for operating a caster includes the following steps: Step 1: Rotate the casters horizontally; Step two: When the caster comes into contact with the step, it stops rotating. Due to inertia, the upper part of the caster flips diagonally upwards along the point where it comes into contact with the step. Step 3: Once the top of the caster stops flipping, the rubber wheel of the caster will flip upwards along the point where it contacts the step. Step four: The caster is located at the top of the step. Under the action of gravity, the upper part of the caster returns to its normal driving state.

[0006] The preferred option is as follows: Preferably, the caster includes a fixed component, a movable bracket, and a rubber wheel; One end of the movable bracket is rotatably connected to the fixed component, the rubber wheel is rotatably connected to the lower end of the movable bracket, a stop rod is fixedly provided at the end of the movable bracket near the rotatable connection with the fixed component, and a limit rod is fixedly provided at the end of the movable bracket away from the rotatable connection with the fixed component.

[0007] Preferred: Step 1, the handcart equipped with casters is pushed from left to right on flat ground. At this time, there are no steps, and the top of the limit rod abuts against the bottom of the fixing component. Step two, when encountering a step, the lower left side of the rubber wheel abuts against the step. Continue pushing the handcart, and the handcart continues to move to the left. Due to the step, the rubber wheel cannot move further to the left. At this time, the fixing component moves to the upper left along the first rotating axis. Subsequently, the top of the stop rod abuts against the bottom right side of the fixing component. Step 3: Under the influence of inertia, the rubber wheel uses the point where it abuts against the step as a fulcrum to flip the right side of the rubber wheel to the left. Step four: The rubber wheel crosses the step and is now at the top of the step. Under the weight of the handcart, the fixing component moves to the right along the first pivot axis. At this point, the limit rod abuts against the bottom of the fixing component, and the handcart continues to be pushed.

[0008] In summary, the present invention has the following beneficial effects: 1. By setting up fixed components, movable brackets, and stop bars, it can achieve the effects of wheel guidance and crank jumping function; 2. By setting up a stop bar, the forward direction of the handcart can be controlled to change from horizontal to diagonally upward, thereby reducing the contact angle and achieving the effect of crossing steps; 3. By setting the limit rod, the two clamps will automatically return to the initial position due to gravity after the handcart is pushed up the steps, thus achieving the effect of reverse operation limit. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the background technology; Figure 2 This is a front view of the overall structural design schematic diagram of Embodiment 1; Figure 3 This is the right-side view of the overall structural design schematic diagram of Embodiment 1; Figure 4 This is a perspective view of the front view of Embodiment 1; Figure 5 This is a perspective view of the front view of the working state of Embodiment 1. Figure 6 This is a flowchart of the working status of Implementation Example 1; Figure 7 This is a front view of the overall structural design schematic diagram of Embodiment 2; Figure 8 This is the bottom side view of the overall structural design schematic diagram of Embodiment 2; Figure 9 This is a perspective view of the front view of Embodiment 2; Figure 10 This is a perspective view of the front view of the working state of Embodiment 2; Figure 11This is a front view of the overall structural design schematic diagram of Embodiment 3; Figure 12 This is the bottom side view of the overall structural design schematic diagram of Embodiment 3; Figure 13 This is a perspective view of the front view of Embodiment 3; Figure 14 This is a perspective view of the front view of the working state of Embodiment 3.

[0010] In the diagram, 1. Fixed component; 2. Rotating mechanism; 3. Movable chassis; 4. Movable mounting base; 5. Rubber wheel; 6. Stop rod; 7. Limiting rod; 8. First rotating shaft; 111. Fixed chassis; 411. Clamping plate; 412. Second rotating shaft; 9. First movable chassis; 10. First movable seat; 11. First rubber wheel; 12. Second rubber wheel; 13. Third rubber wheel; 1001. Second clamping plate; 1002. Third pivot; 1003. Fourth pivot; 14. Second movable card holder; 15. First fixed plate; 16. Second fixed plate; 112. First fixed chassis; 113. Rotating plate. Detailed Implementation

[0011] The present invention will be further described in detail below with reference to the accompanying drawings.

[0012] Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings. Example 1:

[0013] A type of caster, such as Figures 2-5 As shown, it includes a fixed component 1, a movable bracket 4, and rubber wheels 5; One end of the movable card seat 4 is rotatably connected to the fixed component 1, the rubber wheel 5 is rotatably connected to the lower end of the movable card seat 4, a stop rod 6 is fixedly provided at the end of the movable card seat 4 near the rotatably connected point with the fixed component 1, and a limit rod 7 is fixedly provided at the end of the movable card seat 4 away from the rotatably connected point with the fixed component 1.

[0014] The fixed component 1 includes a fixed chassis 111, a rotating mechanism 2, and a movable chassis 3; The movable chassis 3 is located below the fixed chassis 111, the rotating mechanism 2 is rotatably connected between the fixed chassis 111 and the movable chassis 3, and one end of the movable bracket 4 is rotatably connected to the movable chassis 3.

[0015] A first circular perforation is provided at the middle right side of the front part of the movable chassis 3, and a first rotating shaft 8 is inserted into the first circular perforation. The movable card holder 4 includes two clamping plates 411, and the movable base 3 is located between the two clamping plates 411. The upper right side of each clamping plate 411 is provided with a second circular through hole, and the two ends of the first rotating shaft 8 are respectively fixed in the second circular through holes of the two clamping plates 411.

[0016] The movable card holder 4 also includes a second rotating shaft 412, and the rubber wheel 5 is rotatably connected to the second rotating shaft 412. A third circular through hole is opened at the middle position of the lower end of the two clamping plates 411, and the second rotating shaft 412 is fixedly inserted into the third circular through hole of the two clamping plates 411.

[0017] A fourth circular perforation is provided at the upper right end of the two clamping plates 411, and the fourth circular perforation is located to the lower right of the corresponding second circular perforation. The two ends of the stop rod 6 are respectively inserted into the fourth circular through holes of the two clamping plates 411.

[0018] The upper left side of the two clamping plates 411 is provided with a fifth circular through hole, and the two ends of the limiting rod 7 are respectively inserted into the fifth circular through hole of the two clamping plates 411.

[0019] The rotating mechanism 2 is existing technology and is a connecting column in a robot mobile chassis universal caster disclosed in announcement number "CN110254131A".

[0020] The first rotating shaft 8, the second rotating shaft 412, the stop rod 6, and the limit rod 7 can all be fixed by welding, riveting, or nut fixing.

[0021] In this embodiment, the fixed chassis 111 and the rotating mechanism 2 can be removed, and the movable chassis 3 can be directly fixedly connected to the bottom of the handcart.

[0022] A method of working casters, such as Figure 2 , Figure 6 As shown: Step 1: Rotate the casters horizontally; Step two: When the caster comes into contact with the step, it stops rotating. Due to inertia, the upper part of the caster flips diagonally upwards along the point where it comes into contact with the step. Step 3: The upper part of the caster stops flipping. Under the action of inertia, the rubber wheel 5 of the caster flips upward along the part that it is in contact with the step. Step four: The caster is located at the top of the step. Under the action of gravity, the upper part of the caster returns to its normal driving state.

[0023] Specific implementation process: Step 1: Push the wheelbarrow with casters from left to right on flat ground. At this time, there are no steps, and the top of the limit bar 7 abuts against the bottom of the movable chassis 3. Step 2: When encountering a step, the lower left side of the rubber wheel 5 abuts against the step. Continue pushing the handcart. The handcart continues to move to the left. Due to the step, the rubber wheel 5 cannot move to the left. At this time, the movable chassis 3 moves to the upper left along the first pivot 8. Then, the top of the stop rod 6 abuts against the bottom right side of the movable chassis 3. Under the influence of inertia, the rubber wheel 5 uses the point where it abuts against the step as a fulcrum, causing the right side of the rubber wheel 5 to flip to the left; Step 3: Rubber wheel 5 crosses the step and is now at the top of the step. Under the weight of the handcart, the movable chassis 3 moves to the right along the first pivot 8. At this time, the limit rod 7 abuts against the bottom of the movable chassis 3, and the handcart continues to be pushed. Example 2:

[0024] A type of caster, such as Figures 7-10 As shown, it includes a fixed chassis 111, a rotating mechanism 2, a first movable chassis 9, and a first movable mounting base 10; The first movable card holder 10 is equipped with several rubber wheels, taking three types of rubber wheels as examples. First rubber wheel 11, two second rubber wheels 12, third rubber wheel 13; The diameter of the first rubber wheel 11 is 1.25 times the diameter of the two second rubber wheels 12, and the diameter of the second rubber wheel 12 is 1.33 times the diameter of the third rubber wheel 13; The first movable chassis 9 is located below the fixed chassis 111. The rotating mechanism 2 is rotatably connected between the fixed chassis 111 and the first movable chassis 9. One end of the first movable bracket 10 is rotatably connected to the first movable chassis 9. The first rubber wheel 11, the two second rubber wheels 12, and the third rubber wheel 13 are rotatably connected to the lower end of the first movable bracket 10 from right to left. A stop rod 6 is fixedly provided at the end of the first movable bracket 10 near the rotatable connection point with the first movable chassis 9, and a limit rod 7 is fixedly provided at the end of the first movable bracket 10 away from the rotatable connection point with the first movable chassis 9.

[0025] A first circular perforation is provided at the middle right side of the front part of the first movable chassis 9, and a first rotating shaft 8 is inserted into the first circular perforation; The first movable card holder 10 includes two second clamping plates 1001, and the first movable base 9 is located between the two second clamping plates 1001. The upper right side of each of the two second clamping plates 1001 is provided with an eighth circular through hole, and the two ends of the first rotating shaft 8 are respectively fixed in the eighth circular through holes of the two second clamping plates 1001.

[0026] The first movable card holder 10 also includes a second rotating shaft 412, a third rotating shaft 1002, and a fourth rotating shaft 1003. The first rubber wheel 11 is rotatably connected to the second rotating shaft 412. The lower right side of the two second clamping plates 1001 are provided with a ninth circular through hole. The second rotating shaft 412 is fixedly inserted into the ninth circular through hole of the two second clamping plates 1001. Two second rubber wheels 12 are rotatably connected to the front and rear sides of the third rotating shaft 1002, respectively. A sixth circular through hole is provided on the lower right side of each of the two second clamping plates 1001. The third rotating shaft 1002 is fixedly inserted into the sixth circular through hole of the two second clamping plates 1001. The third rubber wheel 13 is rotatably connected to the fourth shaft 1003. The lower left side of the two second clamping plates 1001 are provided with a seventh circular through hole. The fourth shaft 1003 is fixedly inserted into the seventh circular through hole of the two second clamping plates 1001. The second rotating shaft 412, the third rotating shaft 1002, and the fourth rotating shaft 1003 are all on the same horizontal plane, and the first rubber wheel 11 and the third rubber wheel 13 are both located between the two second rubber wheels 12.

[0027] The upper right side of the two second clamping plates 1001 is provided with a tenth circular perforation, which is located to the lower right of the corresponding eighth circular perforation. The two ends of the stop rod 6 are respectively inserted into the tenth circular through holes of the two first clamping plates.

[0028] The upper left side of the two second clamping plates 1001 is provided with an eleventh circular through hole, and the two ends of the limiting rod 7 are respectively inserted into the eleventh circular through hole of the two second clamping plates 1001.

[0029] In this embodiment, a three-wheel type is shown, namely a first rubber wheel 11, two second rubber wheels 12, and a third rubber wheel 13. It can be set as a first rubber wheel 11 and two second rubber wheels 12, or a fourth rubber wheel can be added for a combined design.

[0030] Specific implementation process: Step 1: Push the wheelbarrow with casters from left to right on flat ground. At this time, there are no steps, and the top of the limit bar 7 abuts against the bottom of the first movable chassis 9. Step 2: When encountering a step, the lower left side of the third rubber wheel 13 abuts against the step. Continue pushing the handcart. The handcart continues to move to the left. Due to the step, the caster cannot move to the left. At this time, the first movable chassis 9 moves to the upper left along the first pivot 8. Then, the top of the stop bar 6 abuts against the bottom right side of the first movable chassis 9. Under the influence of inertia, the third rubber wheel 13 uses its point of contact with the step as a support point to flip the right side of the first rubber wheel 11, the two second rubber wheels 12, and the third rubber wheel 13 to the left. Step 3: The third rubber wheel 13 crosses the step and is now at the top of the step. Under the weight of the handcart, the first movable chassis 9 moves to the right along the first pivot 8. At this time, the limit rod 7 abuts against the bottom of the first movable chassis 9, and both second rubber wheels 12 abut against the step, thus stabilizing the handcart. Step 4: Continue pushing the handcart. The two second rubber wheels 12 are at the top of the step. At this time, the first rubber wheel 11 is against the step. Similarly, the two second rubber wheels 12 stabilize the handcart. Step 5: Continue pushing the handcart. At this point, the first rubber wheel 11 is at the top of the step. Example 3:

[0031] A type of caster, such as Figures 11-14 As shown, it includes a fixing component 1, a second movable bracket 14, and a rubber wheel 5; One end of the second movable bracket 14 is rotatably connected to the fixed component 1, the rubber wheel 5 is rotatably connected to the lower end of the second movable bracket 14, a stop rod 6 is fixedly provided at the end of the second movable bracket 14 near the rotatably connected part to the fixed component 1, and a limit rod 7 is fixedly provided at the end of the second movable bracket 14 away from the rotatably connected part to the fixed component 1.

[0032] The fixing component 1 includes a first fixing base 112 and a rotating plate 113. The first fixing base 112 is square plate-shaped, and the bottom of the first movable base 112 is hollow. The rotating plate 113 is fixedly provided on the bottom right side of the first fixing base 112. A twelfth circular through hole is provided at the lower front side of the rotating plate 113, and a first rotating shaft 8 is inserted into the twelfth circular through hole. The second movable card holder 14 is square plate-shaped. The front and rear right sides of the second movable card holder 14 are both fixed with a first fixing plate 15. The front side of the first fixing plate 15 has a thirteenth circular through hole. The front end and rear end of the first rotating shaft 8 are respectively inserted into the thirteenth circular through holes of the two first fixing plates 15.

[0033] The upper right side of the two first fixing plates 15 is also provided with a fourteenth circular through hole, and the two ends of the stop rod 6 are respectively inserted into the fourteenth circular through hole. The stop rod 6 is located on the upper right side of the first rotating shaft 8.

[0034] The bottom left side of the second movable card holder 14 is fixed with a second fixing plate 16 on both the front and rear sides. The lower ends of the two second fixing plates 16 are inserted with a second rotating shaft 412, and the rubber wheel 5 is rotatably connected to the second rotating shaft 412.

[0035] The top left side of the second movable card holder 14 has a fourteenth circular perforation, and the limiting rod 7 is located in the fourteenth circular perforation. The upper third of the limiting rod 7 protrudes from the top of the second movable card holder 14.

[0036] In this embodiment, the limiting rod 7 can be removed, and the top of the second movable card seat 14 directly abuts against the bottom of the first fixed base 112.

[0037] Specific implementation process: Step 1: Push the wheelbarrow with casters from left to right on flat ground. At this time, there are no steps, and the top of the limit rod 7 abuts against the bottom of the first fixed chassis 112. Step 2: When encountering a step, the lower left side of the rubber wheel 5 abuts against the step. Continue pushing the handcart. The handcart continues to move to the left. Due to the step, the rubber wheel 5 cannot move to the left. At this time, the first fixed base 112 moves to the upper left along the first pivot 8 of the rotating plate. Then, the top of the stop rod 6 abuts against the bottom right side of the first fixed base 112. Under the influence of inertia, the rubber wheel 5 uses the point where it abuts against the step as a fulcrum, causing the right side of the rubber wheel 5 to flip to the left; Step 3: Rubber wheel 5 crosses the step and is now at the top of the step. Under the weight of the handcart, the first fixed chassis 112 moves to the right along the first pivot 8. At this time, the limit rod 7 abuts against the bottom of the first fixed chassis 112, and the handcart continues to be pushed.

[0038] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A method for operating a caster, characterized in that, The following working methods are included: Step 1: Rotate the casters horizontally; Step two: When the caster comes into contact with the step, it stops rotating. Due to inertia, the upper part of the caster flips diagonally upwards along the point where it comes into contact with the step. Step 3: Once the top of the caster stops flipping, the rubber wheel of the caster will flip upwards along the point where it contacts the step. Step four: The caster is located at the top of the step. Under the action of gravity, the upper part of the caster returns to its normal driving state.

2. The working method of a caster according to claim 1, characterized in that: Casters include fixed components, movable brackets, and rubber wheels; One end of the movable bracket is rotatably connected to the fixed component, the rubber wheel is rotatably connected to the lower end of the movable bracket, a stop rod is fixedly provided at the end of the movable bracket near the rotatable connection with the fixed component, and a limit rod is fixedly provided at the end of the movable bracket away from the rotatable connection with the fixed component.

3. The working method of a caster according to claim 2, characterized in that: Step 1: Push the wheeled trolley from left to right on flat ground. At this time, there are no steps, and the top of the limit bar abuts against the bottom of the fixing component. Step two, when encountering a step, the lower left side of the rubber wheel abuts against the step. Continue pushing the handcart, and the handcart continues to move to the left. Due to the step, the rubber wheel cannot move further to the left. At this time, the fixing component moves to the upper left along the first rotating axis. Subsequently, the top of the stop rod abuts against the bottom right side of the fixing component. Step 3: Under the influence of inertia, the rubber wheel uses the point where it abuts against the step as a fulcrum to flip the right side of the rubber wheel to the left. Step four: The rubber wheel crosses the step and is now at the top of the step. Under the weight of the handcart, the fixing component moves to the right along the first pivot axis. At this point, the limit rod abuts against the bottom of the fixing component, and the handcart continues to be pushed.

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