Landing leg folding and unfolding structure, goods taking device and forklift

Abstract

The utility model relates to the technical field of warehouse logistics, and particularly discloses a supporting leg folding and unfolding structure which is used for lifting at least one bearing wheel on a supporting leg away from the ground or placing the bearing wheel on the ground, the supporting leg extends out of a containing space or is contained in the containing space, and a first bearing wheel and a first inclined face are arranged on the supporting leg. The first inclined surface is arranged on the bottom surface of the supporting leg, the first bearing wheel is mounted at the end head of the extending end of the supporting leg, and the first inclined surface inclines downwards along one end, close to the first bearing wheel, of the supporting leg; and when the supporting legs extend out, the first bearing wheels gradually get close to the ground and walk along the ground, and when the supporting legs are contained in the containing space, the first bearing wheels do not make contact with the ground.

Description

Technical Field

[0001] The utility model relates to the technical field of warehousing and logistics, and in particular to a leg retracting and extending structure, a cargo picking device and a forklift. Background Art

[0002] In the prior art, there is no outrigger structure under the fork tines of the forklift. When the forklift forks heavier goods, in order to prevent the forklift from tipping over, the forklift needs to have a relatively large counterweight, which results in a relatively large turning radius of the forklift, making it difficult to adapt to warehouses with densely stacked goods. Utility Model Content

[0003] The present application provides a leg retracting and extending structure, which is used to lift at least one of the load-bearing wheels on the leg off the ground or place it on the ground, the leg extends out from a accommodating space or is accommodated in the accommodating space, and the leg is provided with a first load-bearing wheel and a first inclined surface; the first inclined surface is arranged on the bottom surface of the leg, the first load-bearing wheel is installed at the end of the extended end of the leg, and the first inclined surface is inclined downward along one end of the leg close to the first load-bearing wheel; it is configured that when the leg is extended, the first load-bearing wheel gradually approaches the ground and moves along the ground, and when the leg is accommodated in the accommodating space, the first load-bearing wheel does not contact the ground.

[0004] In one embodiment of the present application, a guide wheel that cooperates with the bottom surface of the leg and the inclined surface is provided in the accommodating space, and when the inclined surface sequentially passes over the guide wheel from the near-ground end to the far-ground end, the leg gradually extends out, and the load-bearing wheel gradually approaches the ground and moves along the ground; when the inclined surface sequentially passes over the guide wheel from the far-ground end to the near-ground end, the leg gradually retracts into the accommodating space, and the load-bearing wheel gradually moves away from the ground.

[0005] In one embodiment of the present application, a guide bar is provided on the bottom surface of the leg, the guide bar is arranged along the extension direction of the leg, and a second inclined surface is provided on the guide bar, and the second inclined surface is parallel to the first inclined surface.

[0006] In one embodiment of the present application, at least two guide wheels are arranged in parallel, a gap is provided between any two guide wheels, and the guide strip is configured to guide in the gap between two adjacent guide wheels.

[0007] In one embodiment of the present application, a second roller and / or a third roller are further provided on the supporting leg, the second roller moves and guides on the side wall of the accommodating space, and the third roller moves on the bottom surface of the accommodating space.

[0008] In one embodiment of the present application, the second roller is guided along the side wall of the accommodating space, including: the side wall of the accommodating space is provided with a guide groove, the guide groove is arranged along the extension direction of the leg, and the rotation axis of the second roller is arranged to be parallel to the horizontal plane or perpendicular to the horizontal plane.

[0009] The present application also provides a cargo picking device, including a cargo fork, the cargo fork including a fork arm and a mounting frame, a cargo contacting member is provided on the mounting frame, one end of the cargo contacting member is hinged to the mounting frame, an elastic member and a rigid member are provided on a side of the cargo contacting member away from the cargo, a sensor is provided on the mounting frame, the sensor is used to sense the rigid member, when the cargo contacting member is touched by the cargo, the elastic member is compressed by rotating along the hinge, and the rotation of the cargo contacting member drives the rigid member to trigger the sensor;

[0010] The cargo picking device is installed on the above-mentioned supporting legs through a door frame.

[0011] In one embodiment of the present application, the door frame is installed on an end of the leg away from the extended end, and the picking device can be slidably installed on the door frame.

[0012] In one embodiment of the present application, a first driving device is further provided on the door frame, and the first driving device includes a first driving wheel and a first driving motor, and the first driving device is used to drive the legs to extend and retract.

[0013] In one embodiment of the present application, a second driving device is also provided on the door frame, and the second driving device includes a second driving motor, a gear or a sprocket, and a rack or chain matched with the gear or sprocket is provided in the accommodating space. The second driving motor drives the gear or sprocket to rotate on the rack or chain, and the second driving device is used to drive the leg to extend and retract.

[0014] In one embodiment of the present application, the second driving device further includes a universal joint transmission device, and the universal joint transmission device is used for transmitting between the second driving motor and the gear or sprocket.

[0015] The present application also provides a forklift, comprising a chassis, and the above-mentioned cargo picking device;

[0016] The chassis is provided with two second driving wheels and a universal wheel, and when the two second driving wheels have the same speed and opposite directions, the forklift rotates in place;

[0017] The traveling direction of the forklift is perpendicular to the extending direction of the legs.

[0018] Significant effects of the present application: When the leg structure provided by the present application is extended, the first load-bearing wheel contacts the ground and can be used to bear weight. When retracted into the accommodating space, the first load-bearing wheel does not contact the ground. After being retracted into the accommodating space, the first load-bearing wheel does not contact the ground and will not become an obstacle to the movement of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of one embodiment of the utility model;

[0020] Figure 2 yes Figure 1 A cross-sectional schematic diagram of the implementation state in which the middle outrigger is fully extended;

[0021] Figure 3 yes Figure 1 A cross-sectional schematic diagram of a state where the middle leg is partially extended;

[0022] Figure 4 yes Figure 1 A cross-sectional schematic diagram of the middle outrigger in a fully retracted state;

[0023] Figure 5 is a schematic diagram of a top view of the structure of an embodiment in which the legs are fully extended;

[0024] Figure 6 It is a three-dimensional structural schematic diagram of one embodiment of the utility model;

[0025] Figure 7 It is a three-dimensional structural schematic diagram of one embodiment of the utility model;

[0026] Figure 8 This is a schematic diagram of the three-dimensional structure of a pickup device in one embodiment of the utility model;

[0027] Fig. 9 It is a schematic cross-sectional structure diagram of a pickup device according to one embodiment of the utility model.

[0028] In the figure: 1, chassis; 11, guide wheel;

[0029] 2. Door frame; 21. Outrigger; 22. First load-bearing wheel; 23. First inclined plane; 24. Second load-bearing wheel

[0030] 3. Second driving wheel;

[0031] 4. a first driving wheel; 41. a first driving motor;

[0032] 5. Second drive motor; 51. Universal joint; 52. Gear or sprocket; 53. Rack or chain;

[0033] 6. Pick-up device; 61. Fork; 62. Cargo contact part; 63. Elastic part; 64. Rigid part; 65. Sensor. DETAILED DESCRIPTION

[0034] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0035] In one of the embodiments of the present application, a leg 21 retractable structure is provided, which is used to lift at least one of the load-bearing wheels on the leg 21 off the ground or place it on the ground. The leg 21 extends out from a accommodating space or is accommodated in the accommodating space. The leg 21 is provided with a first load-bearing wheel 22 and a first inclined surface 23; the first inclined surface 23 is provided on the bottom surface of the leg 21, and the first load-bearing wheel 22 is installed at the end of the extended end of the leg 21, and the first inclined surface 23 is inclined downward along the end of the leg 21 close to the first load-bearing wheel 22; it is configured that when the leg 21 is extended, the first load-bearing wheel 22 gradually approaches the ground and moves along the ground, and when the leg 21 is accommodated in the accommodating space, the first load-bearing wheel 22 does not contact the ground.

[0036] A guide wheel 11 that matches the bottom surface of the leg 21 and the inclined surface is provided in the accommodating space. When the inclined surface sequentially passes over the guide wheel 11 from the near-ground end to the far-ground end, the leg 21 gradually extends out, and the first load-bearing wheel 22 gradually approaches the ground and moves along the ground; when the inclined surface sequentially passes over the guide wheel 11 from the far-ground end to the near-ground end, the leg 21 gradually retracts into the accommodating space, and the first load-bearing wheel 22 gradually moves away from the ground.

[0037] In one of the embodiments, the leg 21 can be freely extended and retracted in the accommodating space. When the leg 21 is extended out of the accommodating space, the first load-bearing wheel 22 at the end of the leg 21 contacts the ground. When the leg 21 is retracted into the accommodating space, the first load-bearing wheel 22 at the end of the leg 21 does not contact the ground. In order to achieve this technical solution, a first inclined surface 23 is provided on the bottom surface of the leg 21 provided in this embodiment. Specifically, the first inclined surface 23 can be a large inclined surface that is the bottom surface of the entire leg 21 as a whole, or a first inclined surface 23 can be provided at the end of the leg 21 close to the first load-bearing wheel 22. The inclination angle of the inclined surface is such that the end close to the first load-bearing wheel 22 is the end close to the ground. It can be understood that the first inclined surface 23 is inclined downward along the extending direction of the leg 21. The end of the entire inclined surface close to the first load-bearing wheel 22 is closer to the bottom surface, and the end away from the first load-bearing wheel 22 is far from the ground.

[0038] A guide wheel 11 is provided in the accommodation space and matches the bottom surface of the leg 21. When the leg 21 is extended or retracted, its bottom surface presses over the guide wheel 11. The cooperation between the guide wheel 11 and the first inclined surface 23 makes the first load-bearing wheel 22 gradually contact the bottom surface or gradually lift away from the bottom surface. When the leg 21 is extended outward, before the leg 21 is extended at the beginning, the near-ground end of the first inclined surface 23 presses on the guide wheel 11. At this time, the first load-bearing wheel 22 is farthest from the bottom surface. The first inclined surface 23 presses over the guide wheel 11 in sequence from the near-ground end to the far-ground end. The first load-bearing wheel 22 is close to the bottom surface. The distance gradually becomes closer until it completely contacts the bottom surface and walks on the bottom surface; when the leg 21 needs to be retracted into the accommodating space, at the beginning of retraction, the distal end of the first inclined surface 23 or the horizontal surface of the bottom surface of the leg 21 contacts or does not contact the guide wheel 11. At this time, the first load-bearing wheel 22 contacts the bottom surface, and as the leg 21 retracts into the accommodating space, the first inclined surface 23 rolls over the guide wheel 11 from the distal end to the proximal end, and the first load-bearing wheel 22 changes from contacting the ground to being lifted off the ground, and the distance between it and the ground gradually becomes farther.

[0039] In one embodiment, a guide bar is provided on the bottom surface of the supporting leg 21 , and the guide bar is arranged along the extending direction of the supporting leg 21 . A second inclined surface is provided on the guiding bar, and the second inclined surface is parallel to the first inclined surface 23 .

[0040] In one embodiment, at least two guide wheels 11 are arranged in parallel, a gap is provided between any two guide wheels 11 , and the guide bar is configured to guide in the gap between two adjacent guide wheels 11 .

[0041] In order to ensure that the extension and retraction of the supporting leg 21 are stable and do not sway left and right, in one embodiment, a guide bar is provided on the bottom surface of the supporting leg 21, and the guide bar cooperates with the guide wheel 11 in the accommodating space to lift and lower the first load-bearing wheel 22 and play a guiding role at the same time; the setting direction of the guide bar is consistent with the setting direction of the inclined surface, and both are set along the extension direction of the supporting leg 21, and a second inclined surface is provided on the guide bar, and the second inclined surface on the guide bar is parallel to the first inclined surface 23 on the supporting leg 21.

[0042] In one embodiment, one guide bar is provided, and two guide wheels 11 are provided in parallel. The rotating axis of the guide wheel 11 is parallel to the bottom surface of the support leg 21 and the first inclined surface 23 and the second inclined surface. There is a gap between the two guide wheels 11. The gap between the two guide wheels 11 just allows the guide bar to pass through. The guide bar guides in the gap between the two guide wheels 11. Specifically, multiple guide bars may also be provided, and the multiple guide bars guide in the gaps between adjacent guide wheels 11 respectively.

[0043] In one embodiment, the supporting leg 21 is further provided with a second roller and / or a third roller, the second roller moves and guides on the side wall of the accommodating space, and the third roller moves on the bottom surface of the accommodating space.

[0044] In order to prevent the support leg 21 from shaking left and right during the extension and retraction process, in one embodiment, a second roller and / or a third roller is further provided, and the second roller guides movement on the side wall of the accommodating space. When the accommodating space has multiple side walls, such as left and right side walls, the second roller can be configured as a large wheel with its rotating axis parallel to the two side walls, and the second roller guides movement on both the left and right side walls; or, only one second roller is provided to guide movement on the left side wall or the right side wall; or, two second rollers are provided to guide movement on the left side wall or the right side wall respectively.

[0045] In one embodiment, the rotation axis of the second roller may also be perpendicular to the side wall, including: the side wall of the accommodating space is provided with a guide groove, the guide groove is arranged along the extension direction of the leg 21, and the rotation axis of the second roller is arranged to be parallel to the horizontal plane or perpendicular to the horizontal plane. A guide groove is arranged on the side wall, the guide groove is arranged along the extension direction of the leg 21, and the second roller travels and guides on the top wall and / or bottom wall of the guide groove. The second roller and the third roller are not shown in the drawings.

[0046] In one embodiment, a second load-bearing wheel 24 is further provided. The first load-bearing wheel 22 is provided at the extended end of the support leg 21, and the second load-bearing wheel 24 is provided at the other end of the support leg 21. The second load-bearing wheel 24 walks on the bottom plate of the accommodating space, and the second load-bearing wheel 24 does not contact the ground.

[0047] In one embodiment, a cargo picking device 6 is further provided, comprising a cargo fork 61, wherein the cargo fork 61 comprises a fork arm and a mounting frame, wherein a cargo contacting member 62 is provided on the mounting frame, wherein one end of the cargo contacting member 62 is hinged to the mounting frame, wherein an elastic member 63 and a rigid member 64 are provided on a side of the cargo contacting member 62 away from the cargo, wherein a sensor 65 is provided on the mounting frame, wherein the sensor 65 is used to sense the rigid member 64, wherein when the cargo contacting member 62 is touched by the cargo, the elastic member 63 is compressed by rotating along the hinge, and the rotation of the cargo contacting member 62 drives the rigid member 64 to trigger the sensor 65;

[0048] The picking device 6 is mounted on the above-mentioned supporting leg 21 through the door frame 2. The door frame 2 is mounted on one end of the supporting leg 21 away from the extended end, and the picking device 6 is slidably mounted on the door frame 2.

[0049] In one embodiment, the cargo contact member 62 is an inclined mounting plate, one end of which is hinged to the mounting frame, and the other end is tilted away from the mounting frame and does not contact the mounting frame. An elastic member 63 and a rigid member 64 are also provided between the mounting plate and the mounting frame. When the cargo picking device 6 picks up cargo, the cargo touches the mounting plate, and the mounting plate rotates around the hinge. The mounting plate squeezes the elastic member 63 and the rigid member 64, and the rigid member 64 protrudes in the rotation direction of the mounting plate and touches the sensor 65, which is used to determine whether the cargo picking device 6 carries cargo. Specifically, the elastic member 63 and the rigid member 64 can be arranged together or separately. For example, if they are arranged together, the elastic member 63 can be arranged as a spring, and the rigid member 64 can be arranged as a bearing inside the spring. If they are arranged separately, the rigid member 64 can be arranged near the elastic member 63.

[0050] In one embodiment, the gantry 2 is further provided with a first driving device, the first driving device comprising a first driving wheel 4 and a first driving motor 41, and the first driving device is used to drive the outrigger 21 to extend or retract. The first driving device is arranged on the gantry 2, the first driving wheel 4 of the first driving device walks on a walking surface, and the first driving motor 41 drives the first driving wheel 4 to rotate, thereby driving the outrigger 21 to extend or retract.

[0051] In one embodiment, the door frame 2 is provided with a second driving device, which includes a second driving motor 5 and a gear or sprocket 52. A rack or chain 53 matched with the gear or sprocket 52 is provided in the accommodating space. The second driving motor 5 drives the gear or sprocket 52 to rotate on the rack or chain 53. The second driving device is used to drive the support leg 21 to extend and retract.

[0052] The first driving device and the second driving device of the present application are parallel technical solutions, that is, the first technical solution can be selected to drive the extension and retraction of the leg 21, or the second technical solution can be selected to drive the extension and retraction of the leg 21. The second technical solution is a gear or sprocket 52 rack or chain 53 transmission solution, a rack or chain 53 is provided in the accommodating space, the gear or sprocket 52 of the second driving device is arranged on the leg 21 or the door frame 2, the gear or sprocket 52 is meshed with the rack or chain 53, and the second driving motor 5 drives the gear or sprocket 52 through the universal joint 51.

[0053] In one embodiment, the second driving device further includes a universal joint 51 transmission device, and the universal joint 51 transmission device is used for transmitting between the second driving motor 5 and the gear or sprocket 52.

[0054] In one embodiment, the present application further provides a forklift, comprising a chassis 1 and the above-mentioned cargo picking device 6;

[0055] The chassis 1 is provided with two second driving wheels 3 and a universal wheel. When the two second driving wheels 3 have the same speed and opposite directions, the forklift rotates in situ; the walking direction of the forklift is perpendicular to the extending direction of the legs 21 .

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A leg retracting and extending structure, used to lift at least one load-bearing wheel on a leg off the ground or place it on the ground, characterized in that: The leg extends out from a accommodating space or is accommodated in the accommodating space, and a first load-bearing wheel and a first inclined surface are provided on the leg; the first inclined surface is provided on the bottom surface of the leg, and the first load-bearing wheel is installed at the end of the extended end of the leg, and the first inclined surface is inclined downward along the end of the leg close to the first load-bearing wheel; it is configured that when the leg is extended, the first load-bearing wheel gradually approaches the ground and moves along the ground, and when the leg is accommodated in the accommodating space, the first load-bearing wheel does not contact the ground.

2. A leg retracting and extending structure according to claim 1, characterized in that: A guide wheel matched with the bottom surface of the leg and the inclined surface is arranged in the accommodating space. When the inclined surface presses over the guide wheel in sequence from the near-ground end to the far-ground end, the leg gradually extends out, and the load-bearing wheel gradually approaches the ground and moves along the ground; when the inclined surface presses over the guide wheel in sequence from the far-ground end to the near-ground end, the leg gradually retracts into the accommodating space, and the load-bearing wheel gradually moves away from the ground.

3. The leg retracting structure according to claim 2, characterized in that: A guide bar is provided on the bottom surface of the supporting leg, and the guide bar is arranged along the extending direction of the supporting leg. A second inclined surface is provided on the guiding bar, and the second inclined surface is parallel to the first inclined surface.

4. The leg retracting structure according to claim 3, characterized in that: At least two guide wheels are arranged in parallel, a gap is provided between any two guide wheels, and the guide strip is configured to guide in the gap between two adjacent guide wheels.

5. The leg retracting and extending structure according to claim 1, characterized in that: The supporting leg is also provided with a second roller and / or a third roller, the second roller moves and guides on the side wall of the accommodating space, and the third roller moves on the bottom surface of the accommodating space.

6. The leg retracting and extending structure according to claim 5, characterized in that: The second roller is guided on the side wall of the accommodating space, including: the side wall of the accommodating space is provided with a guide groove, the guide groove is arranged along the extension direction of the support leg, and the rotation axis of the second roller is arranged to be parallel to the horizontal plane or perpendicular to the horizontal plane.

7. A picking device, characterized in that: The fork comprises a fork arm and a mounting frame, a cargo contacting member is arranged on the mounting frame, one end of the cargo contacting member is hinged to the mounting frame, an elastic member and a rigid member are arranged on a side of the cargo contacting member away from the cargo, a sensor is arranged on the mounting frame, the sensor is used to sense the rigid member, when the cargo contacting member is touched by the cargo, the elastic member is compressed by rotating along the hinge, and the rotation of the cargo contacting member drives the rigid member to trigger the sensor; The cargo picking device is installed on the supporting leg described in any one of claims 1-6 through a door frame.

8. The cargo picking device according to claim 7, characterized in that: The door frame is installed on one end of the support leg away from the extended end, and the picking device can be slidably installed on the door frame.

9. The cargo picking device according to claim 8, characterized in that: The door frame is also provided with a first driving device, which includes a first driving wheel and a first driving motor. The first driving device is used to drive the legs to extend and retract.

10. The cargo picking device according to claim 8, characterized in that: The door frame is also provided with a second driving device, which includes a second driving motor, a gear or a sprocket. A rack or a chain matched with the gear or the sprocket is provided in the accommodating space. The second driving motor drives the gear or the sprocket to rotate on the rack or the chain. The second driving device is used to drive the support leg to extend and retract.

11. The cargo picking device according to claim 10, characterized in that: The second driving device further comprises a universal joint transmission device, and the universal joint transmission device is used for transmitting between the second driving motor and the gear or sprocket.

12. A forklift, characterized in that: It comprises a chassis and a picking device as described in any one of claims 7 to 11; The chassis is provided with two second driving wheels and a universal wheel, and when the two second driving wheels have the same speed and opposite directions, the forklift rotates in place; The traveling direction of the forklift is perpendicular to the extending direction of the legs.

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