Lifting mechanism of carrier

Abstract

The utility model discloses a lifting mechanism of a carrier. The lifting mechanism comprises a driving motor, a jacking plate, a bottom plate and a jacking assembly. A crank is fixed on a motor shaft of the driving motor; one end of the crank is rotationally connected with a pull rod; the scissor fork assembly comprises a first fork arm and a second fork arm; the middle parts of the first fork arm and the second fork arm are hinged through a hinge shaft; the upper end of the first fork arm is rotationally connected to the lower side of the jacking plate; a lower guide groove is formed in the bottom plate; a lower roller is arranged in the lower guide groove in a rolling manner; the lower end of the first fork arm is rotationally connected to the lower roller; the lower end of the second fork arm is rotationally connected to the bottom plate; an upper guide groove is formed in the lower side of the jacking plate; an upper roller is arranged in the upper guide groove in a rolling manner; the upper end of the second fork arm is rotationally connected to the upper roller. The lifting mechanism of the carrier is smooth in mechanical transmission, low in energy consumption, low in cost, simple in structure and low in occupied space rate.

Description

Technical Field

[0001] The utility model relates to a lifting mechanism of a transport vehicle. Background Art

[0002] The existing AGV lifting mechanism adopts a crank rocker combined with a double parallel four-bar mechanism or a screw guide rail combined with a scissor fork mechanism. The schematic diagram of the existing AGV lifting mechanism using a crank rocker combined with a double parallel four-bar mechanism has many parts, high cost and high space occupancy; the schematic diagram of the existing AGV lifting mechanism using a screw guide rail combined with a scissor fork mechanism has high cost, poor wear resistance, and inconvenient later maintenance. Utility Model Content

[0003] The utility model provides a lifting mechanism for a transport vehicle to solve the above-mentioned technical problems, and specifically adopts the following technical solutions:

[0004] A lifting mechanism of a transport vehicle comprises: a driving motor, a lifting plate, a bottom plate and a lifting assembly for lifting the lifting plate; a crank is fixed to the motor shaft of the driving motor; one end of the crank is rotatably connected to a pull rod; the lifting assembly comprises: two sets of scissor fork assemblies symmetrically arranged on both sides below the lifting plate; the scissor fork assembly comprises: a first fork arm and a second fork arm; the middle parts of the first fork arm and the second fork arm are hingedly connected by a hinge shaft; the upper end of the first fork arm is rotatably connected to the lower side of the lifting plate; the bottom plate is installed with a lower guide groove; a lower roller is rotatably arranged in the lower guide groove; the first fork arm is connected to the lower side of the lifting plate; the lower guide groove is provided with a lower roller ... guide groove; the lower guide plate is provided with a lower guide groove; the lower guide plate is provided with a lower guide groove; the lower guide plate is provided with a lower guide groove; the lower guide plate is provided with a lower guide groove; the lower guide plate is provided with a lower guide groove; the lower guide plate is provided with a lower guide groove; the lower guide plate is provided with a lower guide groove; the lower guide plate is provided with a lower guide groove; the lower guide plate is provided with a lower guide plate; the lower guide plate is provided with a lower guide plate; the lower guide plate is provided with a lower guide plate; the lower guide plate is provided with a lower guide plate; the lower guide plate is provided with a lower guide plate; the lower guide plate is provided with a lower guide plate; the lower guide plate is provided with a lower guide plate; the lower guide The lower end of a fork arm is rotatably connected to the lower roller; the lower end of the second fork arm is rotatably connected to the bottom plate; an upper guide groove is provided on the lower side of the lifting plate; an upper roller is rotatably provided in the upper guide groove; the upper end of the second fork arm is rotatably connected to the upper roller; a first shaft is rotatably connected between the lower ends of the first forks of the two scissor fork assemblies and between the upper ends of the second forks of the two scissor fork assemblies; a second shaft is rotatably connected between the lower ends of the second forks of the two scissor fork assemblies and between the upper ends of the first forks of the two scissor fork assemblies; one end of the pull rod is rotatably sleeved on the outer periphery of the first shaft.

[0005] Furthermore, the upper roller is arranged tangent to the upper groove wall and the lower groove wall of the upper guide groove; the lower roller is arranged tangent to the upper groove wall and the lower groove wall of the lower guide groove.

[0006] Further, the two upper guide grooves and the two lower guide grooves correspond one to one in the vertical direction.

[0007] Further, the upper guide groove and the lower guide groove corresponding to each other in the vertical direction are in contact and support with each other when the lifting plate is located at the lowest position.

[0008] Furthermore, the first fork arm and the second fork arm are formed with empty grooves on both sides of the hinge axis for reducing the overall weight.

[0009] Furthermore, the upper guide groove and the lower guide groove are both formed with limiting portions at the ends away from the driving motor, respectively used to limit the upper roller and the lower roller.

[0010] Furthermore, the upper end of the first fork arm is connected to the lower side of the lifting plate through an upper connecting seat; the lower end of the second fork arm is connected to the upper side of the base plate through a lower connecting seat.

[0011] Furthermore, the two upper connecting seats and the two lower connecting seats correspond one to one in the vertical direction.

[0012] Furthermore, the upper connecting seat and the lower connecting seat corresponding to each other in the vertical direction support each other when the lifting plate is located at the lowest position.

[0013] The utility model is beneficial in that the lifting mechanism of the transport vehicle provided adopts a crank and a pull rod to push the first fork arm and the second fork arm, and the first fork arm and the second fork arm are stably rotated under the rolling structure of the roller and the guide groove, thereby driving the jacking plate to stably rise and fall, and the pull rod pulls the roller to move in the guide groove to adjust the twisting angle of the first fork arm and the second fork arm, the mechanical transmission is smooth, the energy consumption is low, the cost is low, the structure is simple, and the space occupancy rate is low. In addition, the lifting mechanism of the transport vehicle is arranged on the bottom plate as a whole, which is convenient for overall assembly and transportation, high production efficiency, and convenient disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 is a schematic diagram of a lifting mechanism of a transport vehicle involved in the present application;

[0016] Figure 2 yes Figure 1 A schematic diagram showing the internal structure of the upper guide groove and the lower guide groove of the lifting mechanism of the transport vehicle in FIG.

[0017] The transport vehicle comprises a lifting mechanism 10, a driving motor 11, a lifting plate 12, a bottom plate 13, a crank 14, a pull rod 15, a first fork arm 16, a second fork arm 17, a hinge shaft 18, a lower guide groove 19, a lower roller 20, an upper guide groove 21, an upper roller 22, an upper connecting seat 23, a lower connecting seat 24, a first shaft 25, a second shaft 26, an empty groove 27, and a limiting portion 28. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0021] like Figures 1 to 2 As shown, a lifting mechanism 10 of a transport vehicle of the present application includes: a driving motor 11, a lifting plate 12, a base plate 13 and a lifting assembly. The lifting assembly is installed above the base plate 13 and can lift the lifting plate 12 through the driving motor 11. The driving motor 11, the lifting plate 12 and the lifting assembly are all installed above the base plate 13 to form an installed whole.

[0022] As a specific structure, a crank 14 is fixed to the motor shaft of the driving motor 11, and a pull rod 15 is rotatably connected to one end of the crank 14. The lifting assembly includes: two sets of scissor fork assemblies symmetrically arranged on both sides below the lifting plate 12. The scissor fork assembly includes: a first fork arm 16 and a second fork arm 17, and the middle parts of the first fork arm 16 and the second fork arm 17 are hingedly connected by a hinge shaft 18. The upper end of the first fork arm 16 is rotatably connected to the lower side of the lifting plate 12, and the bottom plate 13 is installed with a lower guide groove 19, and a lower roller 20 is rotatably arranged in the lower guide groove 19, and the lower end of the first fork arm 16 is rotatably connected to the lower roller 20. The lower end of the second fork arm 17 is rotatably connected to the bottom plate 13, and an upper guide groove 21 is provided on the lower side of the lifting plate 12, and an upper roller 22 is rotatably arranged in the upper guide groove 21, and the upper end of the second fork arm 17 is rotatably connected to the upper roller 22. A first shaft 25 is rotatably connected between the lower ends of the first fork arms 16 of the two scissor fork assemblies and between the upper ends of the second fork arms 17 of the two scissor fork assemblies, and a second shaft 26 is rotatably connected between the lower ends of the second fork arms 17 of the two scissor fork assemblies and between the upper ends of the first fork arms 16 of the two scissor fork assemblies. One end of the pull rod 15 is rotatably sleeved on the outer periphery of the first shaft 25, so that when the drive motor 11 drives the crank 14, the first shaft 25 can be pushed and pulled by the pull rod 15, thereby driving the first fork arm 16 and the second fork arm 17 to perform a scissors action, thereby realizing the lifting of the lifting plate 12.

[0023] Based on the above connection structure, when the driving motor 11 drives the crank 14 to rotate clockwise, the crank 14 pulls the pull rod 15, thereby moving in the lower guide groove 19 through the lower roller 20. At this time, the first fork arm 16 and the second fork arm 17 of the two scissor fork assemblies are constrained by the rotationally connected bottom plate 13 and the lifting plate 12, and the rolling displacement of the upper roller 22, and rotate relative to each other, thereby driving the lifting plate 12 to descend. When the driving motor 11 drives the crank 14 to rotate counterclockwise, the crank 14 pushes the pull rod 15, thereby moving in the lower guide groove 19 through the lower roller 20. At this time, the first fork arm 16 and the second fork arm 17 of the two scissor fork assemblies are constrained by the rotationally connected bottom plate 13 and the lifting plate 12, and the rolling displacement of the upper roller 22, and rotate relative to each other, thereby driving the lifting plate 12 to rise.

[0024] The lifting mechanism 10 of the above-mentioned transport vehicle adopts a crank 14 and a pull rod 15 to push the first fork arm 16 and the second fork arm 17. The first fork arm 16 and the second fork arm 17 rotate stably under the rolling structure of the roller and the guide groove, thereby driving the lifting plate 12 to rise and fall stably. The pull rod 15 pulls the roller to move in the guide groove to adjust the twisting angle of the first fork arm 16 and the second fork arm 17. The mechanical transmission is smooth, the energy consumption is low, the cost is low, the structure is simple, and the space occupancy rate is low. In addition, the lifting mechanism 10 of the transport vehicle is arranged on the bottom plate 13 as a whole, which is convenient for overall assembly and transportation, high production efficiency, and convenient disassembly and maintenance.

[0025] As a specific implementation method, the upper roller 22 is arranged tangent to the upper groove wall and the lower groove wall of the upper guide groove 21, and the lower roller 20 is arranged tangent to the upper groove wall and the lower groove wall of the lower guide groove 19. This can ensure that the upper roller 22 and the lower roller 20 can move stably along a straight line, thereby ensuring the smoothness and stability of the lifting of the lifting plate 12.

[0026] As a specific implementation manner, the two upper guide grooves 21 and the two lower guide grooves 19 correspond one to one in the vertical direction, and the upper guide grooves 21 and the lower guide grooves 19 corresponding to each other in the vertical direction support each other when the lifting plate 12 is at the lowest position, so that the lifting plate 12 can be auxiliary supported, the overall structure is more stable, and the load requirements for the drive motor 11 are reduced.

[0027] As a specific implementation, the first fork arm 16 and the second fork arm 17 are formed with a slot 27 on both sides of the hinge shaft 18 to reduce the overall weight.

[0028] As a specific implementation, the upper guide groove 21 and the lower guide groove 19 are both formed with a limiting portion 28 at one end away from the drive motor 11. The limiting portion 28 can limit the rolling stroke of the upper roller 22 and the lower roller 20 to ensure the lifting stability.

[0029] As a specific implementation, the upper end of the first fork arm 16 is connected to the lower side of the lifting plate 12 through the upper connecting seat 23, and the lower end of the second fork arm 17 is connected to the upper side of the bottom plate 13 through the lower connecting seat 24. The two upper connecting seats 23 and the two lower connecting seats 24 correspond to each other in the vertical direction. The upper connecting seats 23 and the lower connecting seats 24 corresponding to each other in the vertical direction support each other when the lifting plate 12 is at the lowest position. By arranging the lower connecting seat 24 and the upper connecting seat 23 on the bottom plate 13 and the lifting plate 12 to form a supporting structure, and then cooperating with the supporting structure of the upper guide groove 21 and the lower guide groove 19, the lifting plate 12 can be supported from four positions of the lifting plate 12, and the lifting structure is stable, the structural wear is low, and the service life is longer.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the above embodiments do not limit the utility model in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the utility model.

Claims

1. A lifting mechanism for a transport vehicle, characterized in that: include: A driving motor, a lifting plate, a bottom plate and a lifting assembly for lifting the lifting plate; A crank is fixed to the motor shaft of the driving motor; One end of the crank is rotatably connected to a pull rod; The lifting assembly comprises: two sets of scissor fork assemblies symmetrically arranged on both sides below the lifting plate; The scissor fork assembly comprises: a first fork arm and a second fork arm; The middle parts of the first fork arm and the second fork arm are hingedly connected via a hinge shaft; The upper end of the first fork arm is rotatably connected to the lower side of the jacking plate; The bottom plate is provided with a lower guide groove; A lower roller is rotatably arranged in the lower guide groove; The lower end of the first fork arm is rotatably connected to the lower roller; The lower end of the second fork arm is rotatably connected to the bottom plate; An upper guide groove is provided on the lower side of the jacking plate; An upper roller is rotatably arranged in the upper guide groove; The upper end of the second fork arm is rotatably connected to the upper roller; A first shaft is rotatably connected between the lower ends of the first fork arms of the two scissor fork assemblies and between the upper ends of the second fork arms of the two scissor fork assemblies; A second shaft is rotatably connected between the lower ends of the second fork arms of the two scissor fork assemblies and between the upper ends of the first fork arms of the two scissor fork assemblies; One end of the pull rod is rotatably sleeved on the outer periphery of the first shaft.

2. The lifting mechanism of the transport vehicle according to claim 1, characterized in that: The upper roller is arranged tangent to the upper groove wall and the lower groove wall of the upper guide groove; The lower roller is arranged tangent to the upper groove wall and the lower groove wall of the lower guide groove.

3. The lifting mechanism of the transport vehicle according to claim 1, characterized in that: The two upper guide grooves and the two lower guide grooves correspond one to one in the vertical direction.

4. The lifting mechanism of the transport vehicle according to claim 3, characterized in that: The upper guide groove and the lower guide groove corresponding to each other in the vertical direction are in contact and support with each other when the lifting plate is located at the lowest position.

5. The lifting mechanism of the transport vehicle according to claim 1, characterized in that: The first fork arm and the second fork arm are formed with empty grooves on both sides of the hinge shaft for reducing the overall weight.

6. The lifting mechanism of the transport vehicle according to claim 1, characterized in that: The upper guide groove and the lower guide groove are both formed with limiting portions at their ends away from the driving motor, respectively used to limit the upper roller and the lower roller.

7. The lifting mechanism of the transport vehicle according to claim 1, characterized in that: The upper end of the first fork arm is connected to the lower side of the jacking plate through an upper connecting seat; The lower end of the second fork arm is connected to the upper side of the bottom plate through a lower connecting seat.

8. The lifting mechanism of the transport vehicle according to claim 7, characterized in that: The two upper connecting seats and the two lower connecting seats correspond one to one in the vertical direction.

9. The lifting mechanism of the transport vehicle according to claim 8, characterized in that: The upper connecting seat and the lower connecting seat corresponding to each other in the vertical direction are in contact and support with each other when the lifting plate is located at the lowest position.

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