CN111874510A - Transport vehicle - Google Patents
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- CN111874510A CN111874510A CN202010902954.7A CN202010902954A CN111874510A CN 111874510 A CN111874510 A CN 111874510A CN 202010902954 A CN202010902954 A CN 202010902954A CN 111874510 A CN111874510 A CN 111874510A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G1/00—Storing articles, individually or in orderly arrangement, in warehouses or magazines
- B65G1/02—Storage devices
- B65G1/04—Storage devices mechanical
- B65G1/0492—Storage devices mechanical with cars adapted to travel in storage aisles
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Abstract
The invention provides a delivery wagon, comprising: the first wheel shaft assembly, the second wheel shaft assembly and the cam assembly are arranged on the frame respectively; the first and second axle assemblies are each movable in a Z-direction relative to the frame; the first wheel shaft assembly is arranged along the X direction, the second wheel shaft assembly is arranged along the Y direction, and the X direction, the Y direction and the Z direction are vertical to each other; the output end of the cam assembly is capable of pushing the first and/or second axle assemblies downward to bring at least one of the first and second axle assemblies into contact with the ground.
Description
Technical Field
The invention relates to the field of vehicle engineering, in particular to a delivery wagon.
Background
The goods need be transported to the delivery wagon among the storage handling process, because the delivery wagon needs shuttle between the goods shelves, the goods shelves interval is less, and the mode of turning of traditional vehicle needs great turning radius, therefore current delivery wagon often adopts the mode that the multiunit quadrature gyro wheel switches to carry out the change of direction.
The roller needs to be lifted in the roller switching process, the height of the gravity center of the transport vehicle from the ground can be changed during lifting, the transport vehicle can have a large load, the change of the gravity center of the transport vehicle means the change of the height potential energy of the transport vehicle, and when the gravity center of the transport vehicle becomes high, large electric energy or other external energy sources need to be consumed to supplement the potential energy.
Disclosure of Invention
The invention aims to provide a conveying vehicle, which can keep the height of the gravity center unchanged in the direction switching process.
In one aspect, the present invention provides a conveyor car comprising:
the first wheel shaft assembly, the second wheel shaft assembly and the cam assembly are arranged on the frame respectively;
the first and second axle assemblies are each movable in a Z-direction relative to the frame;
the first wheel shaft assembly is arranged along the X direction, the second wheel shaft assembly is arranged along the Y direction, and the X direction, the Y direction and the Z direction are vertical to each other;
the output end of the cam assembly is capable of pushing the first and/or second axle assemblies downward to bring at least one of the first and second axle assemblies into contact with the ground.
Further, the cam assembly comprises a cam body, the cam body is rotatably arranged on the frame, and the axis of the cam body is parallel to the Z direction;
the side end surface of the cam body, which is vertical to the Z direction, comprises a lower limit area and an upper limit area, and a transition area is arranged between the lower limit area and the upper limit area;
the lower limit area is used for pushing the first wheel axle assembly and/or the second wheel axle assembly to move close to the ground along the Z direction;
the upper limit region is used for avoiding the first wheel axle assembly or the second wheel axle assembly from moving away from the ground along the Z direction.
Further, the cam assembly comprises a first cam and a second cam, the first cam and the second cam are coaxially arranged, and the axis is parallel to the X direction or the Y direction;
the side ring surface of the first cam comprises a first long diameter section, a first short diameter section and a first transition section which are connected end to end along a first circumferential direction, the side ring surface of the second cam comprises a second long diameter section, a second short diameter section and a second transition section which are connected end to end along a second circumferential direction, and the first circumferential direction is opposite to the second circumferential direction;
the first long diameter section and the first transition section are connected to form a first protruding portion, the second long diameter section and the second transition section are connected to form a second protruding portion, and the first protruding portion and the second protruding portion are overlapped in the projection along the axial direction of the first cam and the second cam.
Further, the dimension of the cam body at the lower limit region in the Z direction is larger than the dimension of the cam body at the upper limit region in the Z direction;
when the first axle assembly abuts the lower limit region, the second axle assembly abuts the lower limit region or the upper limit region or the transition region;
when the first wheel axle assembly abuts against the upper limit region, the second wheel axle assembly abuts against the lower limit region or the transition region;
the second axle assembly abuts the lower limit region or the upper limit region when the first axle assembly abuts the transition region.
Further, the conveying vehicle further comprises a first contact block and a second contact block;
the first contact block is connected with the first axle assembly, and the second contact block is connected with the second axle assembly;
the first contact block and the second contact block are used for being abutted against the output end of the cam assembly.
Furthermore, the first wheel shaft assembly comprises a first shaft and a second shaft which extend along the X direction, the first shaft and the second shaft are arranged on the frame at intervals along the Y direction, and rollers are arranged on the first shaft and the second shaft; a plurality of groups of first contact blocks are arranged on the first shaft at intervals, and a plurality of groups of first contact blocks are arranged on the second shaft at intervals;
and/or the second wheel shaft assembly comprises a third shaft and a fourth shaft which extend along the Y direction, the third shaft and the fourth shaft are arranged on the frame at intervals along the X direction, and rollers are arranged on the third shaft and the fourth shaft; the interval sets up the multiunit on the third axle the second contacts the piece, the interval sets up the multiunit on the fourth axle the second contacts the piece.
The first cam and the second cam rotate synchronously;
when the contact position of the first wheel shaft assembly and the side ring surface of the first cam enters the first short diameter section from the first long diameter section through the first transition section, the contact position of the second wheel shaft assembly and the side ring surface of the second cam enters the second long diameter section from the second short diameter section through the second transition section;
when the first axle assembly abuts the first short diameter section, the second axle assembly abuts the second long diameter section;
when the first axle assembly abuts the first long diameter section, the second axle assembly abuts the second short diameter section or the second transition section;
the second axle assembly abuts the second major diameter section when the first axle assembly abuts the first transition section.
Further, the conveyor car further comprises a first power assembly for driving the cam body to rotate, and the first power assembly comprises:
the driving wheel is in transmission connection with a power source and distributes rotating power to the cam body, and the driving wheel is in rotating connection with the frame;
the cam bodies are arranged on the driven wheels in a one-to-one correspondence and coaxial mode, and the driven wheels are connected with the driving wheel through belt transmission or chain transmission.
Further, the transport vehicle further includes a second power assembly for driving the first cam and the second cam to rotate, and the second power assembly includes:
the first transmission shaft and the second transmission shaft extend along the X direction or the Y direction and are arranged in parallel, cam pairs consisting of first cams and second cams are arranged at two ends of the first transmission shaft and two ends of the second transmission shaft respectively, each first cam is used for pushing the first wheel shaft assembly, and each second cam is used for pushing the second wheel shaft assembly;
the first transmission shaft and the second transmission shaft are in transmission connection with a power source.
Further, the plane of the side end face at the lower limit area is perpendicular to the Z direction.
Furthermore, the sizes of all the first long-diameter sections are consistent along the radial direction; the second long diameter section is consistent in size along the radial direction.
Further, a first spring for driving the first wheel shaft assembly to be far away from the ground along the Z direction is arranged between the first wheel shaft assembly and the frame;
and/or a second spring for driving the second wheel axle assembly to be far away from the ground along the Z direction is arranged between the second wheel axle assembly and the frame.
Has the advantages that:
the scheme utilizes the cam component to simultaneously push the first wheel shaft component and the second wheel shaft component to reach the lower limit position, so that the first wheel shaft component and the second wheel shaft component are simultaneously grounded, one of the first wheel shaft component and the second wheel shaft component is lifted off the ground, the other one of the first wheel shaft component and the second wheel shaft component is kept to move along the X direction or the Y direction, and the change of the gravity center of the conveying vehicle caused by the lifting of the other one of the first wheel shaft component and the second wheel shaft component in the descending process is avoided in the switching process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a transport vehicle provided in embodiment 1 of the present invention;
fig. 2 is another schematic structural view of a transport vehicle provided in embodiment 1 of the present invention;
fig. 3 is a schematic structural view of a cam body according to embodiment 1 of the present invention;
fig. 4 is a schematic structural diagram of a transport vehicle provided in embodiment 2 of the present invention;
fig. 5 is an axial projection schematic view of a first cam and a second cam provided in embodiment 2 of the present invention;
fig. 6 is a schematic structural diagram of a second cam provided in embodiment 2 of the present invention.
Icon: 1-a vehicle frame; 2-the ground; 3-a first axis; 4-a third axis; 5-a first spring; 6-a second spring; 7-a roller; 8-driving wheel; 9-driven wheel; 10-fourth axis; 11-a second axis; 12-a second contact block; 13-a first contact block; 14-a cam body; 15-lower limit zone; 16-upper limit region; 17-a transition region; 18-a first drive shaft; 19-a second drive shaft; 20-a second cam; 21-a first cam; 22-a second short diameter section; 23-a second transition section; 24-a second projection; 25-second length diameter section.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The conveyor car according to fig. 1 to 3 comprises:
the device comprises a frame 1, a first wheel shaft assembly, a second wheel shaft assembly and a cam assembly, wherein the first wheel shaft assembly, the second wheel shaft assembly and the cam assembly are respectively arranged on the frame 1;
the first wheel axle assembly and the second wheel axle assembly are both capable of moving in the Z direction relative to the frame 1;
the first wheel shaft assembly is arranged along the X direction, the second wheel shaft assembly is arranged along the Y direction, and the X direction, the Y direction and the Z direction are vertical to each other;
the output end of the cam assembly can push the first and/or second axle assemblies downward to bring at least one of the first and second axle assemblies into contact with the ground 2.
The first wheel shaft assembly and the second wheel shaft assembly are respectively connected with the frame 1 in a rotating mode, independent lifting devices are arranged between the first wheel shaft assembly and the frame 1, the second wheel shaft assembly and the frame 1, the first wheel shaft assembly and the second wheel shaft assembly can independently move up and down relative to the frame 1, when the conveying vehicle is located on the ground 2, the direction perpendicular to the ground 2 is defined as the Z direction, according to three-dimensional coordinates, the advancing direction of the conveying vehicle when the first wheel shaft assembly rotates is set as the Y direction, and the advancing direction of the conveying vehicle when the second wheel shaft assembly rotates is set as the X direction.
The first wheel shaft assembly and the second wheel shaft assembly are respectively pushed by the cam assembly to independently perform lifting movement in the Z direction under the pushing action force, when the first wheel shaft assembly or the second wheel shaft assembly is lifted to an upper limit position, the first wheel shaft assembly or the second wheel shaft assembly is completely separated from the ground, and when the second wheel shaft assembly is lowered to a lower limit position, the first wheel shaft assembly or/and the second wheel shaft assembly is grounded. The first wheel axle component is grounded, the second wheel axle component is grounded, the conveying vehicle is in a Y-direction movement state, the first wheel set is grounded, the second wheel set is grounded, the conveying vehicle is in an X-direction movement state, and the conveying vehicle can be switched between the X direction and the Y direction through pushing of the cam component.
Because the switching process relates to the switching of the first wheel axle assembly or the second wheel axle assembly, and the switching process relates to the rising or falling process, in order to ensure that the gravity center of the delivery wagon cannot move along the Z direction in the switching process, the cam assembly is utilized to simultaneously push the first wheel axle assembly and the second wheel axle assembly to reach the lower limit position, so that the first wheel axle and the second wheel axle assembly are simultaneously grounded, one of the first wheel axle and the second wheel axle assembly is lifted off the ground, the other wheel is kept to move along the X or Y direction, and the gravity center change of the delivery wagon caused by the lifting of the other wheel in the descending process is avoided in the switching process.
In an alternative embodiment, the cam assembly includes a cam body 14, the cam body 14 is rotatably disposed on the frame 1, and the axis of the cam body 14 is parallel to the Z direction;
the side end face of the cam body 14 perpendicular to the Z direction comprises a lower limit area 15 and an upper limit area 16, and a transition area 17 is arranged between the lower limit area 15 and the upper limit area 16;
the lower limit region 15 is used for pushing the first wheel axle assembly and/or the second wheel axle assembly to move close to the ground 2 along the Z direction;
the upper limit zone 16 is used to avoid movement of the first or second axle assembly away from the ground 2 in the Z-direction.
The power output end of the cam body 14 is located on the side end face, in the scheme, the power output end of the cam body 14 is arranged on the side end face of the downward end, and the cam body 14 pushes the first wheel axle assembly and the second wheel axle assembly through the contact between the side end faces and the first wheel axle assembly and the second wheel axle assembly.
The side end face in the scheme is divided into four areas, namely an upper limit area 16 and a lower limit area 15, two transition areas 17 are arranged between the upper limit area 16 and the lower limit area 15, and along with the rotation of the cam body 14, different areas on the side end face respectively output pushing acting force to the first wheel axle assembly and the second wheel axle assembly, so that the first wheel axle assembly and the second wheel axle assembly move up and down along the Z direction.
According to the scheme, the two wheel shaft assemblies are respectively controlled through rotation of the same cam body 14, and the relative positions of the first wheel shaft assembly and the second wheel shaft assembly on the plane where the XY directions are located are fixed, so that the areas corresponding to the two wheel shaft assemblies respectively can be changed through rotation, different combinations of grounding or grounding conditions between the first wheel shaft assembly and the second wheel shaft assembly are achieved through combinations corresponding to the area conditions respectively, and the effect of direction switching is achieved.
In an alternative embodiment, the dimension of the cam body 14 in the Z direction at the lower limit zone 15 is greater than the dimension of the cam body 14 in the Z direction at the upper limit zone 16;
when the first axle assembly abuts the lower limit region 15, the second axle assembly abuts the lower limit region 15 or the upper limit region 16 or the transition region 17;
when the first wheel axle assembly abuts the upper limit region 16, the second wheel axle assembly abuts the lower limit region 15 or the transition region 17;
when the first axle assembly abuts the transition region 17, the second axle assembly abuts the lower limit region 15 or the upper limit region 16.
The cam body 14 in the present embodiment has a rotation axis parallel to the Z direction, so that the upper limit region 16, the lower limit region 15, and the transition region 17 in the present embodiment are located on downward side end surfaces, a plane where another end surface of the side end surface is located is perpendicular to the Z direction in the present embodiment, the thickness of the cam body 14 at the lower limit region 15 is greater than the thickness of the cam body 14 at the upper limit region 16, the side end surface of the cam body 14 at the lower limit region 15 is closer to the ground 2, and the side end surface of the cam body 14 at the upper limit region 16 is farther from the ground 2, and during the rotation of the cam body 14, the thicker lower limit region 15 pushes the first axle assembly or the second axle assembly downward to ground.
In an alternative embodiment, the transport vehicle further comprises a first contact block 13 and a second contact block 12;
the first contact block 13 is connected with the first wheel shaft assembly, and the second contact block 12 is connected with the second wheel shaft assembly;
the first contact block 13 and the second contact block 12 are both adapted to abut against the output end of the cam assembly.
In an alternative embodiment, the first wheel axle assembly comprises a first shaft 3 and a second shaft 11 extending along the X direction, the first shaft 3 and the second shaft 11 are arranged on the frame 1 at intervals along the Y direction, and the rollers 7 are arranged on the first shaft 3 and the second shaft 11; a plurality of groups of first contact blocks 13 are arranged on the first shaft 3 at intervals, and a plurality of groups of first contact blocks 13 are arranged on the second shaft 11 at intervals;
and/or the second wheel shaft assembly comprises a third shaft 4 and a fourth shaft 10 which extend along the Y direction, the third shaft 4 and the fourth shaft 10 are arranged on the frame 1 at intervals along the X direction, and rollers 7 are arranged on the third shaft 4 and the fourth shaft 10; a plurality of groups of second contact blocks 12 are arranged on the third shaft 4 at intervals, and a plurality of groups of second contact blocks 12 are arranged on the fourth shaft 10 at intervals.
The first contact block 13 is connected with a first rotating wheel in a rotating mode, the second contact block 12 is connected with a second rotating wheel in a rotating mode, the first rotating wheel in the scheme can be replaced by a bearing, as the cam body 14 generates relative friction between the first contact block 13 and the second contact block 12 and the side end face of the cam body 14 in the rotating process, the first rotating wheel and the second rotating wheel have the function of reducing friction, the intersection point of the rotating axes of the first rotating wheel and the second rotating wheel in the scheme is located on the rotating axis of the cam body 14, the rotating circumferential track of the first rotating wheel and the rotating circumferential track of the second rotating wheel are parallel to the tangent line of the rotating track of the cam shaft at the position, and when the first rotating wheel and the second rotating wheel are driven to rotate by the friction force of the side end face of the cam body 14, friction generated by relative displacement between the outer ring face and the side end face of the cam body 14 can be reduced.
In order to make the first wheel and the second wheel stay at the lower limit region 15 at the same time, so as to realize the simultaneous grounding of the first wheel shaft assembly and the second wheel shaft assembly, the lower limit region 15 can contact the first wheel and the second wheel at the same time in the scheme. The cam body 14 in the scheme is a cylinder, the upper limit area 16, the lower limit area 15 and the transition area 17 are distributed on the side end surface in a fan shape, the radial size of the side end surface is consistent with the axial sizes of the first rotating wheel and the second rotating wheel, and because the included angle between the rotating axes of the first rotating wheel and the second rotating wheel is 90 degrees, the included angle of the lower limit area 15 in the scheme is larger than 90 degrees, meanwhile, in order to avoid that the first wheel shaft assembly and the second wheel shaft assembly are in a rising or falling state simultaneously, and therefore the gravity center of the conveying vehicle is changed, the included angle of the transition area 17 in the scheme is smaller than 90 degrees, preferably 80 degrees, and therefore the first rotating wheel or the second rotating wheel is prevented from being in the transition.
When the first contact block 13 is located in the upper limit area 16, the second contact block 12 is located in the lower limit area 15, at this time, the first contact block 13 is pushed by the upper limit area 16, the first shaft 3 and the second shaft 11 drive the roller 7 to descend and contact the ground 2, the second contact block 12 is pushed by the upper limit area 16, the third shaft 4 and the fourth shaft 10 drive the roller 7 to lift and leave the ground 2, and at this time, the conveying vehicle is in a Y-direction state; the cam body 14 rotates, the second contact block 12 enters the lower limit area 15 through the transition area 17, at this time, the second contact block 12 is pushed by the lower limit area 15, the third shaft 4 and the fourth shaft 10 drive the roller 7 to descend to be in contact with the ground 2, and at this time, the first contact block 13 is still in the lower limit area 15, so that the first shaft 3 and the second shaft 11 drive the roller 7 to still be in contact with the ground 2, at this time, the transport vehicle is in a conversion state, and because the first shaft 3 and the second shaft 11 are always in a grounding state while the third shaft 4 and the fourth shaft 10 descend, the center of gravity of the transport vehicle is unchanged along the Z direction in the conversion process; the cam body 14 continues to rotate, the first contact block 13 enters the upper limit area 16 through the transition area 17, at this time, the first contact block 13 is pushed by the upper limit area 16, under the action of external force, the first shaft 3 and the second shaft 11 drive the roller 7 to ascend and leave the ground, at this time, the second contact block 12 is still located in the lower limit area 15, the third shaft 4 and the fourth shaft 10 still drive the roller 7 to be in contact with the ground 2, at this time, the conveying vehicle is in a Y-direction state, and therefore switching is completed. When the transport vehicle needs to be switched from the Y direction to the X direction, the cam body 14 rotates reversely, so that the third shaft 4 and the fourth shaft 10 are lifted off the ground after the first shaft 3 and the second shaft 11 are descended to be grounded, and the switching is completed.
In an alternative embodiment, the feed carriage further comprises a first power assembly for driving the cam body 14 in rotation, the first power assembly comprising:
the driving wheel 8 is in transmission connection with a power source and distributes rotating power for the cam body 14, and the driving wheel 8 is in rotating connection with the frame 1;
the driven wheels 9 and the cam bodies 14 are arranged on the driven wheels 9 in a one-to-one correspondence and are coaxially arranged, and the driven wheels 9 and the driving wheel 8 are connected through belt transmission or chain transmission.
The number of the driven wheels 9 is the same as that of the cam bodies 14, four cross points exist among the first shaft 3, the second shaft 11, the third shaft 4 and the fourth shaft 10, the number of the cam bodies 14 is four, the number of the driven wheels 9 is four, the driving wheel 8 and the four driven wheels 9 are in transmission connection through a belt or a transmission chain, belt transmission is preferably adopted in the scheme, chain teeth are not needed to be designed on a wheel rim in the chain transmission mode, and therefore the size of the driving wheel 8 or the driven wheels 9 is increased.
The belt is attached to the edges of the driven wheels 9 in sequence, the driven wheels 9 and the cam bodies 14 are driven to synchronously rotate through rotation of the driving wheels 8, the rotating directions of the driven wheels 9 are consistent, so that the first shaft 3 and the second shaft 11 are guaranteed to be lifted consistently, the third shaft 10 is lifted consistently, and the rotating directions of the driving wheels 8 and the driven wheels 9 depend on the winding mode of the belt.
In an alternative embodiment, the plane of the lateral end faces at the lower limit zone 15 is perpendicular to the Z direction.
The state of the conveying vehicle is converted by means of pushing generated by different thicknesses of all areas of the cam body 14, the conversion of all the areas with different thicknesses of the cam body 14 is realized through the rotation of the cam body 14, and because the first contact block 13 and the second contact block 12 are always abutted and pressed against the side end face of the cam body 14 under the action of external force in the rotating process of the cam body 14, the plane of the side end face of the upper limit area 16 and the side end face of the lower limit area 15 in the scheme are perpendicular to the Z direction, the surface flatness of the upper limit area 16 and the lower limit area 15 is ensured, when the first contact block 13 and the second contact block 12 sweep, the upper limit area 16 and the lower limit area 15 cannot be pushed up and down due to different thicknesses, and the purpose of unchanged gravity center height in the conversion process is met.
In an alternative embodiment, a first spring 5 for urging the first axle assembly away from the ground 2 in the Z-direction is provided between the first axle assembly and the frame 1;
and/or a second spring 6 for driving the second wheel axle assembly away from the ground 2 along the Z direction is arranged between the second wheel axle assembly and the frame 1.
Example 2
As shown in fig. 4 to 6, the cam assembly includes a first cam 21 and a second cam 20, the first cam 21 and the second cam 20 are coaxially disposed, and the axis is parallel to the X direction or the Y direction;
the side annular surface of the first cam 21 comprises a first long diameter section, a first short diameter section and a first transition section which are connected end to end along a first circumferential direction, the side annular surface of the second cam 20 comprises a second long diameter section 25, a second short diameter section 22 and a second transition section 23 which are connected end to end along a second circumferential direction, and the first circumferential direction is opposite to the second circumferential direction;
the joint of the first long diameter section and the first transition section forms a first bulge, the joint of the second long diameter section 25 and the second transition section 23 forms a second bulge 24, and the projections of the first bulge and the second bulge 24 along the axial direction of the first cam 21 and the second cam 20 have an overlapping area.
The first cam 21 rotates synchronously with the second cam 20;
when the contact position of the first wheel axle component and the side ring surface of the first cam 21 enters the first short diameter section from the first long diameter section through the first transition section, the contact position of the second wheel axle component and the side ring surface of the second cam 20 enters the second long diameter section 25 from the second short diameter section 22 through the second transition section 23;
when the first axle assembly abuts the first short diameter section, the second axle assembly abuts the second long diameter section 25;
when the first axle assembly abuts the first long diameter section, the second axle assembly abuts the second short diameter section 22 or the second transition section 23;
when the first axle assembly abuts the first transition section, the second axle assembly abuts the second long diameter section 25.
When the first cam 21 and the second cam 20 rotate synchronously, the contact position of the first contact block 13 and the side annular surface of the first cam 21 enters a first long-diameter section from a first short-diameter section through a first transition section, and the contact position of the second contact block 12 and the side annular surface of the second cam 20 enters a second short-diameter section 22 from a second long-diameter section 25 through a second transition section 23; in the process, when the first contact block 13 is pushed by the first short-diameter section, the first shaft 3 and the second shaft 11 drive the roller 7 to lift off the ground, at the moment, the second contact block 12 is pushed by the second long-diameter section 25, the third shaft 4 and the fourth shaft 10 drive the roller 7 to contact the ground 2, and at the moment, the transport vehicle is in an X-direction state; the first cam 21 and the second cam 20 rotate, when the first contact block 13 enters the first long diameter section through the first transition section, the first contact block is pushed by the first long diameter section, the first shaft 3 and the second shaft 11 drive the roller 7 to contact with the ground 2, the second contact block 12 is still in the second long diameter section 25 and is pushed by the second long diameter section 25, the third shaft 4 and the fourth shaft 10 drive the roller 7 to contact with the ground 2, and the conveyor is in a conversion state because the first shaft 3, the second shaft 11 and the roller 7 on the third shaft 4 and the fourth shaft 10 are simultaneously in contact with the ground 2, and the roller 7 of the first shaft 3 and the second shaft 11 is always in a grounding state in the descending process of the third shaft 4 and the fourth shaft 10 in the conversion process, so that the gravity center of the conveyor does not change along the Z direction; the first cam 21 and the second cam 20 continue to rotate, when the second contact block 12 enters the second short-diameter section 22 through the second transition section 23, the second contact block 12 is pushed by the second short-diameter section 22, under the action of external force, the third shaft 4 and the fourth shaft 10 drive the roller 7 to lift off the ground, at the moment, the first contact block 13 is still in the first long-diameter section and is pushed by the first long-diameter section, therefore, the first shaft 3 and the second shaft 11 drive the roller 7 to keep a grounding state, and at the moment, the conveyor is in a Y-direction state. When the transport vehicle needs to be switched from the Y direction to the X direction, the first cam 21 is rotated reversely, so that the third shaft 4 and the fourth shaft 10 drive the roller 7 to be grounded, and then the first shaft 3 and the second shaft 11 drive the roller 7 to be lifted off the ground, thereby completing the conversion.
The transport vehicle further comprises a second power assembly for driving the first cam 21 and the second cam 20 to rotate, the second power assembly comprising:
the first transmission shaft 18 and the second transmission shaft 19 extend along the X direction or the Y direction and are arranged in parallel, cam pairs consisting of first cams 21 and second cams 20 are respectively arranged at two ends of the first transmission shaft 18 and two ends of the second transmission shaft 19, each first cam 21 is used for pushing the first wheel axle assembly, and each second cam 20 is used for pushing the second wheel axle assembly;
the first transmission shaft 18 and the second transmission shaft 19 are both in transmission connection with a power source.
The two cam pairs on the first transmission shaft 18 can ensure the consistency of rotation, the two cam pairs on the second transmission shaft 19 can also ensure the consistency of rotation, the first transmission shaft 18 and the second transmission shaft 19 are in transmission connection with the same power source in a gear set or belt transmission, chain transmission and other modes, and the consistency between the first transmission shaft 18 and the second transmission shaft 19 is ensured through a mechanical transmission structure. In this embodiment, the first and second transmission shafts 18 and 19 extend in the X direction and are parallel to the first and second shafts 3 and 11.
The sizes of all parts of the first long-diameter section are consistent along the radial direction; the second long diameter section 25 has a uniform dimension in the radial direction throughout.
The state conversion of the conveying vehicle depends on the pushing generated by the difference of the radial sizes of the long diameter section and the short diameter section, the conversion between the long diameter section and the short diameter section is realized through the rotation of the first cam 21 and the second cam 20, and because the first contact block 13 and the second contact block 12 are always abutted against and extruded with the side ring surfaces of the first cam 21 and the second cam 20 under the action of external force in the rotating process, the sizes of the first long diameter section in the radial direction are consistent; the sizes of all the positions of the second long-diameter section 25 are consistent along the radial direction, so that when the first contact block 13 and the second contact block 12 are swept, the first long-diameter section and the second long-diameter section 25 cannot be pushed up and down due to different radial sizes, and the purpose of keeping the gravity center height unchanged in the conversion process of the scheme is met.
In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that the following embodiments are merely illustrative of the present invention, and not restrictive, and the scope of the present invention is not limited thereto: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
1. The delivery wagon, its characterized in that includes:
the device comprises a frame (1) and a first wheel shaft assembly, a second wheel shaft assembly and a cam assembly which are arranged on the frame (1) respectively;
the first and second axle assemblies are each movable in the Z-direction relative to the frame (1);
the first wheel shaft assembly is arranged along the X direction, the second wheel shaft assembly is arranged along the Y direction, and the X direction, the Y direction and the Z direction are vertical to each other;
the output end of the cam assembly is capable of pushing the first and/or second axle assembly downward to bring at least one of the first and second axle assemblies into contact with the ground surface (2).
2. Feed wagon according to claim 1, characterized in that the cam assembly comprises a cam body (14), which cam body (14) is rotatably arranged to the frame (1) and the axis of which cam body (14) is parallel to the Z-direction;
the side end surface of the cam body (14) perpendicular to the Z direction comprises a lower limit region (15) and an upper limit region (16), and a transition region (17) is arranged between the lower limit region (15) and the upper limit region (16);
the lower limit area (15) is used for pushing the first wheel axle assembly and/or the second wheel axle assembly to move close to the ground (2) along the Z direction;
the upper limit region (16) is used for avoiding the first wheel axle assembly or the second wheel axle assembly moving away from the ground (2) along the Z direction.
3. Transport carriage as claimed in claim 2, characterized in that the dimension of the cam body (14) in the Z direction at the lower limit region (15) is greater than the dimension of the cam body (14) in the Z direction at the upper limit region (16);
-when the first axle assembly abuts the lower limit region (15), the second axle assembly abuts the lower limit region (15) or the upper limit region (16) or the transition region (17);
-when the first wheel axle assembly abuts the upper limit region (16), the second wheel axle assembly abuts the lower limit region (15) or the transition region (17);
when the first axle assembly abuts the transition region (17), the second axle assembly abuts the lower limit region (15) or the upper limit region (16).
4. Conveyor car according to claim 2, characterized in that it further comprises a first power assembly for driving the cam body (14) in rotation, said first power assembly comprising:
the driving wheel (8) is in transmission connection with a power source and distributes rotating power for the cam body (14), and the driving wheel (8) is in rotating connection with the frame (1);
the cam bodies (14) are arranged on the driven wheels (9) in a one-to-one correspondence and in a coaxial mode, and the driven wheels (9) are connected with the driving wheel (8) through belt transmission or chain transmission.
5. Conveyor car according to claim 3, characterized in that the plane of the side end faces at the lower limit area (15) is perpendicular to the Z-direction.
6. Transport vehicle according to claim 1, characterized in that the cam arrangement comprises a first cam (21) and a second cam (20), the first cam (21) and the second cam (20) being arranged coaxially and with an axis parallel to the X-direction or the Y-direction;
the side ring surface of the first cam (21) comprises a first long diameter section, a first short diameter section and a first transition section which are connected end to end along a first circumferential direction, the side ring surface of the second cam (20) comprises a second long diameter section (25), a second short diameter section (22) and a second transition section (23) which are connected end to end along a second circumferential direction, and the first circumferential direction is opposite to the second circumferential direction;
the joint of the first long diameter section and the first transition section forms a first bulge, the joint of the second long diameter section (25) and the second transition section (23) forms a second bulge (24), and the projections of the first bulge and the second bulge (24) along the axial direction of the first cam (21) and the second cam (20) form an overlapping region.
7. Transport carriage as claimed in claim 6, characterized in that the first cam (21) rotates synchronously with the second cam (20);
when the side ring surface contact position of the first wheel axle assembly and the first cam (21) is from the first long diameter section to the first short diameter section through the first transition section, the side ring surface contact position of the second wheel axle assembly and the second cam (20) is from the second short diameter section (22) to the second long diameter section (25) through the second transition section (23);
when the first axle assembly abuts the first short diameter section, the second axle assembly abuts the second long diameter section (25);
when the first axle assembly abuts the first long diameter section, the second axle assembly abuts the second short diameter section (22) or the second transition section (23);
the second axle assembly abuts the second long diameter section (25) when the first axle assembly abuts the first transition section.
8. Transport vehicle according to claim 6, characterized in that it further comprises a second power assembly for driving the first cam (21) and the second cam (20) in rotation, said second power assembly comprising:
the first transmission shaft (18) and the second transmission shaft (19) extend along the X direction or the Y direction and are arranged in parallel, two ends of the first transmission shaft (18) and two ends of the second transmission shaft (19) are respectively provided with a cam pair consisting of a first cam (21) and a second cam (20), each first cam (21) is used for pushing the first wheel shaft assembly, and each second cam (20) is used for pushing the second wheel shaft assembly;
the first transmission shaft (18) and the second transmission shaft (19) are in transmission connection with a power source.
9. The cart of claim 6, wherein the first major diameter section is uniform in size throughout in the radial direction; the second long diameter section (25) is uniform in size in the radial direction throughout.
10. Transport carriage as claimed in claim 2 or 6, characterized in that it further comprises a first contact block (13) and a second contact block (12);
the first contact block (13) is connected with the first axle assembly, and the second contact block (12) is connected with the second axle assembly;
the first contact block (13) and the second contact block (12) are used for being abutted with the output end of the cam assembly.
11. The conveyor car according to claim 10, characterized in that the first wheel axle assembly comprises a first shaft (3) and a second shaft (11) extending in the X direction, and the first shaft (3) and the second shaft (11) are arranged at intervals in the Y direction on the frame (1), and the first shaft (3) and the second shaft (11) are provided with rollers (7); a plurality of groups of first contact blocks (13) are arranged on the first shaft (3) at intervals, and a plurality of groups of first contact blocks (13) are arranged on the second shaft (11) at intervals;
and/or the second wheel shaft assembly comprises a third shaft (4) and a fourth shaft (10) extending along the Y direction, the third shaft (4) and the fourth shaft (10) are arranged on the frame (1) at intervals along the X direction, and rollers (7) are arranged on the third shaft (4) and the fourth shaft (10); the interval sets up the multiunit on third axle (4) second contact piece (12), the interval sets up the multiunit on fourth axle (10) second contact piece (12).
12. Conveyor car according to any of claims 1-9, characterized in that a first spring (5) is provided between the first wheel axle assembly and the frame (1) for urging the first wheel axle assembly away from the ground (2) in the Z-direction;
and/or a second spring (6) for driving the second wheel axle assembly away from the ground (2) along the Z direction is arranged between the second wheel axle assembly and the frame (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010902954.7A CN111874510A (en) | 2020-08-31 | 2020-08-31 | Transport vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010902954.7A CN111874510A (en) | 2020-08-31 | 2020-08-31 | Transport vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111874510A true CN111874510A (en) | 2020-11-03 |
Family
ID=73198882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010902954.7A Pending CN111874510A (en) | 2020-08-31 | 2020-08-31 | Transport vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111874510A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114261677A (en) * | 2022-01-29 | 2022-04-01 | 上海方仓智能科技有限公司 | High-density stereoscopic warehouse |
| CN114368577A (en) * | 2022-01-29 | 2022-04-19 | 上海方仓智能科技有限公司 | Box intelligent warehouse system of stack |
| CN114367955A (en) * | 2022-01-29 | 2022-04-19 | 上海方仓智能科技有限公司 | Reversing mechanism for stereoscopic warehouse robot |
-
2020
- 2020-08-31 CN CN202010902954.7A patent/CN111874510A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114261677A (en) * | 2022-01-29 | 2022-04-01 | 上海方仓智能科技有限公司 | High-density stereoscopic warehouse |
| CN114368577A (en) * | 2022-01-29 | 2022-04-19 | 上海方仓智能科技有限公司 | Box intelligent warehouse system of stack |
| CN114367955A (en) * | 2022-01-29 | 2022-04-19 | 上海方仓智能科技有限公司 | Reversing mechanism for stereoscopic warehouse robot |
| CN114261677B (en) * | 2022-01-29 | 2023-03-14 | 上海方仓智能科技有限公司 | High-density stereoscopic warehouse |
| WO2023142246A1 (en) * | 2022-01-29 | 2023-08-03 | 上海方仓智能科技有限公司 | High-density stereoscopic warehouse |
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