Telescopic fork capable of reducing deflection

Abstract

The utility model relates to a flexible fork capable of reducing deflection, which comprises a base frame, a first rack rail and a transmission gear, the moving track is mounted on the base frame, the moving track comprises a second rack rail and an intermediate gear, the transmission gear is meshed with the second rack rail, and the moving track moves along the base frame; the pallet fork is installed on the moving track, the pallet fork is provided with a third toothed rail, the intermediate gear is meshed with the first toothed rail and the third toothed rail, and the pallet fork moves along the moving track; the reduction part is used for lifting the base frame, and the lifting direction of the reduction part is opposite to the deformation direction of the base frame; according to the telescopic fork, the reduction part is arranged at the position, prone to deformation, of the base frame, so that when the reduction part bears loads on the base frame, force opposite to the deformation direction of the base frame is accurately and automatically applied according to the deflection curve calculated by the control system, deformation generated by the base frame is eliminated, and the service life of the telescopic fork is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of telescopic forks, and in particular to a telescopic fork capable of reducing deflection. Background Art

[0002] In recent years, with the increasing popularity of the Internet, e-commerce has developed rapidly. Customer orders are characterized by a wide variety of products, small batches, and short delivery times. This has led to a continuous increase in the storage density of shelves in supplier logistics distribution centers, and an increasing frequency of material entry and exit. More and more logistics distribution centers are adopting goods-to-person picking systems based on shuttle vehicles. The telescopic forks adopt a two-stage differential telescopic structure to achieve the ability to reach the pick-up and placement stations on the shelves when extended and to stay within the range of the shuttle vehicle body when retracted. The dragging system and drive system between the telescopic arms serve as the transmission system to complete the differential telescopic operation of the forks.

[0003] According to Chinese patent CN215854949U, a heavy-duty telescopic fork with a narrow cross-section is disclosed, which includes two parallel telescopic fork assemblies and a drive assembly. The telescopic fork assembly includes a cargo fork assembly, a cargo fork moving assembly, a middle fork assembly, and a lower fork assembly. The cargo fork assembly, the middle fork assembly, and the lower fork assembly are installed in coordination with each other from top to bottom. The cargo fork moving assembly is used to drive the cargo fork assembly to slide on the middle fork assembly in the direction of the middle fork assembly. The drive assembly is provided on the lower fork assembly of one of the telescopic fork assemblies. The drive assembly is used to drive the middle fork assembly to slide on the lower fork assembly in the direction of the lower fork assembly. The cross-section height direction is larger, and the moment of inertia is increased, thereby reducing the deflection. However, after carrying heavy goods for a long time, the telescopic fork will still deflect after the goods press on the telescopic fork.

[0004] Therefore, it is necessary to develop a telescopic fork that reduces deflection to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a telescopic fork with reduced loss and deflection.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a telescopic fork with reduced deflection, comprising:

[0007] A base frame is provided with a first rack and a transmission gear;

[0008] A movable track is installed on the base frame, the movable track includes a second rack and an intermediate gear, the transmission gear is engaged with the second rack, and the movable track moves along the base frame;

[0009] a fork mounted on the movable track, the fork having a third rack, the intermediate gear respectively meshing with the first rack and the third rack, and the fork moving along the movable track;

[0010] The cutting portion is used to lift the base frame, and the lifting direction is opposite to the direction in which the base frame is deformed.

[0011] Furthermore, the reduction portion includes a lifting motor, a driving rod connected to the lifting motor, and a movable plate installed at the end of the driving rod, and the movable plate is used to lift the base frame.

[0012] Furthermore, the reduction portion also includes an upper fixed plate and a lower fixed plate, the upper fixed plate is installed on the lower surface of the base frame, the lower fixed plate is installed below the upper fixed plate and is arranged opposite to the upper fixed plate, and the movable plate extends between the upper fixed plate and the lower fixed plate to lift the upper fixed plate.

[0013] Furthermore, the lower surface of the upper fixed plate forms an inclined surface, the top of the movable plate forms an inclined surface, and the inclined surface formed on the top of the movable plate contacts the inclined surface formed on the lower surface of the upper fixed plate.

[0014] Furthermore, the number of the cutting parts is a pair, and the pair of cutting parts have the same structure and are respectively located at two ends of the base frame.

[0015] Furthermore, one end of the base frame is a reduction portion, and the other end is installed with a rotating mechanism. One end of the base frame rises to offset the deflection of the telescopic fork, and the other end rotates around the rotating mechanism.

[0016] Furthermore, the rotating mechanism includes an upper fixed seat and a lower fixed seat and a rotating shaft connecting the upper fixed seat and the lower fixed seat, the upper fixed seat is installed on the lower surface of the base, the lower fixed seat is in a fixed state, and the upper fixed seat and the lower fixed seat are arranged relative to each other.

[0017] Furthermore, the movable track is recessed from its bottom to form an empty slot, and the empty slot extends from one end of the movable track to the other end, so as to avoid interference with the first rack rail when the movable track moves.

[0018] Furthermore, the second rack is located in the empty slot, and the transmission gear extends into the empty slot to engage with the second rack.

[0019] Compared with the prior art, the beneficial effect of the present invention is that: the present invention is a telescopic fork that reduces deflection and has the characteristic of reducing loss. By arranging a reduction portion at a position where the base frame is easily deformed, the reduction portion can accurately and automatically apply a force in the opposite direction of the deformation of the base frame according to the deflection curve calculated by the control system when the base frame is loaded, thereby eliminating the deformation of the base frame and increasing the service life of the telescopic fork. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of a telescopic fork for reducing deflection according to the present invention;

[0022] Figure 2 for Figure 1 A partial cross-sectional view of the base frame of the telescopic fork with reduced deflection;

[0023] Figure 3 for Figure 1 A perspective view of the base frame of the telescopic fork shown to reduce deflection;

[0024] Figure 4 for Figure 1 Schematic diagram of the moving track structure of the telescopic fork for reducing deflection;

[0025] Figure 5 for Figure 1 A cross-sectional view of the moving track and base frame of the telescopic fork shown to reduce deflection;

[0026] Figure 6 for Figure 1 A cross-sectional view of the moving track, base frame and fork of the telescopic fork with reduced deflection shown;

[0027] Figure 7 for Figure 1 Schematic diagram of the structure of the reduction portion of the telescopic fork for reducing deflection;

[0028] Figure 8 for Figure 7 A side cross-sectional view of the reduced portion of the telescopic fork showing reduced deflection;

[0029] Figure 9 This is a schematic diagram of the three-dimensional structure of another embodiment of a telescopic fork for reducing deflection according to the present invention;

[0030] Figure 10 for Figure 9 Schematic diagram of the rotating mechanism structure of the telescopic fork for reducing deflection.

[0031] In the figure: 1. linkage device; 2. base frame; 3. moving track; 4. fork; 5. reduction part; 11. driving motor; 12. transmission rod; 13. reducer; 14. driving gear; 21. connecting part; 22. supporting part; 23. first rack; 24. vertical plate; 25. limiter; 26. roller; 27. transmission gear; 31. first slide; 32. empty slot; 33. second rack; 34. intermediate gear; 35. reduction gear; 36. second slide; 41. avoidance slot; 42. auxiliary roller; 43. third rack; 51. lifting motor; 52. driving rod; 53. movable plate; 54. upper fixed plate; 55. lower fixed plate; 6. rotating mechanism; 61. upper fixed seat; 62. lower fixed seat; 63. rotating shaft. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Please see Figures 1 to 8 The utility model is a telescopic fork with reduced deflection, which includes a linkage device 1, a base frame 2 connected to the linkage device 1, a movable track 3 installed on the base frame 2, a fork 4 moving along the movable track 3, and a reducing part 5 driving the base frame 2 and the movable track 3 to lift.

[0034] Please see Figures 1 to 2 The linkage device 1 includes a drive motor 11 and a transmission rod 12 driven by the drive motor 11. The drive motor 11 is horizontally arranged, and its output end is connected to a reducer 13. The transmission rod 12 is connected to the reducer 13. The drive motor 11 drives the transmission rod 12 to rotate through the reducer 13. The transmission rod 12 is sleeved with multiple driving gears 14. The multiple driving gears 14 rotate synchronously with the transmission rod 12 as the center.

[0035] Please see Figures 1 to 3 The base frame 2 includes a connecting portion 21 and a supporting portion 22. The connecting portion 21 is located at the bottom of the supporting portion 22 and is used to accommodate part of the transmission rod 12. The supporting portion 22 is horizontal, and its upper surface is provided with a first rack 23, which extends from one end of the supporting portion 22 to the other end. Vertical plates 24 are provided on both sides of the first rack 23. The bottom of the vertical plates 24 is fixedly connected to the supporting portion 22, and the top of the vertical plates 24 extends vertically upward. The inner sides of the vertical plates 24 are provided with a plurality of limit members 25 and a plurality of rollers 26. One end of the limit member 25 is fixedly connected to the inner side of the vertical plate 24, and the other end extends horizontally relative to the inner side of the vertical plate 24 to limit the movement of the track 3. The plurality of rollers 26 extend horizontally relative to the inner side of the vertical plate 24.

[0036] A plurality of transmission gears 27 are further installed in the base frame 2 . The plurality of transmission gears 27 mesh with each other. One of the transmission gears 27 is located in the connecting portion 21 and meshes with the driving gear 14 .

[0037] Please see Figures 1 to 4 The moving track 3 is recessed from both sides to form a first slide groove 31, and the first slide groove 31 extends from one end of the moving track 3 to the other end. A number of limit members 25 and a number of rollers 26 extend into the first slide groove 31, so that the moving track 3 only moves along the number of limit members 25 and the number of rollers 26. The moving track 3 is recessed from its bottom to form an empty groove 32, and the empty groove 32 extends from one end of the moving track 3 to the other end, and is used to avoid interference with the first rack rail 23 when the moving track 3 moves. A second rack rail 33 is provided in the empty groove 32, and the second rack rail 33 extends from one end of the empty groove 32 to the other end thereof. The transmission gear 27 extends into the empty groove 32 and engages with the second rack rail 33.

[0038] Please see Figure 6 An intermediate gear 34 is installed in the moving track 3. The number of the intermediate gears 34 is a pair. A reduction gear 35 is installed between the pair of intermediate gears 34. The reduction gears 35 are respectively engaged with the intermediate gears 34 for reducing the speed of the intermediate gears 34. The bottom of any intermediate gear 34 extends into the empty slot 32 and engages with the first rack 23. The top of the other intermediate gear 34 extends out of the upper surface of the moving track 3 and engages with the fork 4.

[0039] A second sliding groove 36 is provided above the first sliding groove 31 , and the second sliding groove 36 extends from one end to the other end of the movable track 3 .

[0040] Please see Figure 3 and Figure 6 The fork 4 includes a clearance groove 41 formed inwardly from its lower surface, and the top of the movable track 3 extends into the clearance groove 41. A plurality of auxiliary rollers 42 are provided on the inner walls on both sides of the clearance groove 41. The plurality of auxiliary rollers 42 respectively extend into the second slide groove 36, so that the fork 4 moves only along the plurality of auxiliary rollers 42.

[0041] A third rack 43 is provided in the clearance groove 41. The third rack 43 extends from one end of the fork 4 to the other end thereof, and the intermediate gear 34 is engaged with the third rack 43.

[0042] Please see Figure 7 and Figure 8The cutting part 5 includes a lifting motor 51, a driving rod 52 connected to the lifting motor 51, and a movable plate 53 installed at the end of the driving rod 52. The lifting motor 51 is installed on the outside of the linkage device 1, one end of the driving rod 52 is connected to the lifting motor 51, and the other end extends horizontally outward to connect the movable plate 53. The cutting part 5 also includes an upper fixed plate 54 and a lower fixed plate 55. The upper fixed plate 54 is installed on the lower surface of the base frame 2, and its lower surface forms an inclined surface. The lower fixed plate 55 is installed below the upper fixed plate 54 and is arranged opposite to the upper fixed plate 54. The top of the movable plate 53 forms an inclined surface, which extends between the upper fixed plate 54 and the lower fixed plate 55. The inclined surface of its top contacts the inclined surface formed on the lower surface of the upper fixed plate 54. According to the deflection curve calculated by the control system, the lifting motor 51 drives the movable plate 53 to extend between the upper fixed plate 54 and the lower fixed plate 55 according to the fixed load and the extended position, and ejects the upper fixed plate 54, so that the upper fixed plate 54 is accurately and automatically controlled to rise.

[0043] In another embodiment, the number of the cutout portions 5 is a pair, and the pair of cutout portions 5 have the same structure and are located at both ends of the base frame 2 respectively.

[0044] Please see Figure 9 and Figure 10 In another embodiment, one end of the base frame 2 is the cutout portion 5, and the other end is mounted with a rotating mechanism 6. The rotating mechanism 6 includes an upper fixing seat 61, a lower fixing seat 62, and a rotating shaft 63 connecting the upper fixing seat 61 and the lower fixing seat 62. The upper fixing seat 61 is mounted on the lower surface of the base frame 2, and the lower fixing seat 62 is in a fixed state. The upper fixing seat 61 and the lower fixing seat 62 are arranged opposite each other. The rotating shaft 63 passes through the upper fixing seat 61 and the lower fixing seat 62, and the upper fixing seat 61 moves around the rotating shaft 63.

[0045] When the telescopic fork with reduced deflection of the present invention is in use, the driving motor 11 drives the multiple driving gears 14 to rotate synchronously with the transmission rod 12 as the center. The driving gears 14 then drive the multiple transmission gears 27 to rotate in a meshing manner. The transmission gears 27 mesh with the second rack 33 to drive the movable track 3 to move along the multiple limit members 25 and the multiple rollers 26. The intermediate gear 34 moves accordingly. The intermediate gear 34 meshes with the first rack 23 and the third rack 43 respectively, driving the fork 4 to move along the multiple auxiliary rollers 42.

[0046] When the telescopic fork is deflected, the lifting motor 51 drives the movable plate 53 to extend between the upper fixed plate 54 and the lower fixed plate 55 according to the fixed load and the extended position, and pushes out the upper fixed plate 54, so that the upper fixed plate 54 is accurately and automatically controlled to rise, offsetting the deflection of the telescopic fork. In another embodiment, one end of the base frame 2 rises to offset the deflection of the telescopic fork, and the other end of the base frame 2 moves as the center of the shaft 63.

[0047] The utility model is a telescopic fork with deflection reduction, which has the characteristic of reducing loss. By arranging a reduction portion at a position where a base frame is easily deformed, the reduction portion can accurately and automatically apply a force in the opposite direction to the deformation of the base frame according to a deflection curve calculated by a control system when the base frame is loaded, thereby eliminating the deformation of the base frame and increasing the service life of the telescopic fork.

[0048] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A telescopic fork for reducing deflection, characterized in that: It includes: A base frame (2) is provided with a first rack (23) and a transmission gear (27); A movable track (3) is mounted on the base frame (2), the movable track (3) comprising a second rack (33) and an intermediate gear (34), the transmission gear (27) is meshed with the second rack (33), and the movable track (3) moves along the base frame (2); A fork (4) is mounted on the movable track (3), the fork (4) having a third rack (43), the intermediate gear (34) being engaged with the first rack (23) and the third rack (43), respectively, and the fork (4) moving along the movable track (3); The reduction portion (5) is used to lift the base frame (2), and the lifting direction is opposite to the direction in which the base frame (2) is deformed.

2. The telescopic fork with reduced deflection according to claim 1, characterized in that: The reduction portion (5) comprises a lifting motor (51), a driving rod (52) connected to the lifting motor (51), and a movable plate (53) mounted at the end of the driving rod (52), wherein the movable plate (53) is used to lift the base frame (2).

3. The telescopic fork with reduced deflection according to claim 2, characterized in that: The reduction portion (5) further includes an upper fixed plate (54) and a lower fixed plate (55), wherein the upper fixed plate (54) is mounted on the lower surface of the base frame (2), and the lower fixed plate (55) is mounted below the upper fixed plate (54) and arranged opposite to the upper fixed plate (54), and the movable plate (53) extends between the upper fixed plate (54) and the lower fixed plate (55) to lift the upper fixed plate (54).

4. The telescopic fork with reduced deflection according to claim 3, characterized in that: The lower surface of the upper fixed plate (54) forms an inclined surface, the top of the movable plate (53) forms an inclined surface, and the inclined surface formed on the top of the movable plate (53) contacts the inclined surface formed on the lower surface of the upper fixed plate (54).

5. The telescopic fork with reduced deflection according to claim 1, characterized in that: The number of the cutting portions (5) is a pair, and the pair of cutting portions (5) have the same structure and are respectively located at the two ends of the base frame (2).

6. The telescopic fork with reduced deflection according to claim 1, wherein: One end of the base frame (2) is a reduction portion (5), and the other end is equipped with a rotating mechanism (6). One end of the base frame (2) rises to offset the deflection of the telescopic fork, and the other end rotates around the rotating mechanism (6).

7. The telescopic fork with reduced deflection according to claim 6, characterized in that: The rotating mechanism (6) comprises an upper fixed seat (61), a lower fixed seat (62), and a rotating shaft (63) connecting the upper fixed seat (61) and the lower fixed seat (62); the upper fixed seat (61) is mounted on the lower surface of the base frame (2); the lower fixed seat (62) is in a fixed state; and the upper fixed seat (61) and the lower fixed seat (62) are arranged relative to each other.

8. The telescopic fork with reduced deflection according to claim 1, wherein: The movable track (3) is recessed from its bottom to form an empty slot (32), and the empty slot (32) extends from one end of the movable track (3) to the other end, and is used to avoid interference with the first rack rail (23) when the movable track (3) moves.

9. The telescopic fork with reduced deflection according to claim 8, characterized in that: The second rack rail (33) is located in the empty slot (32), and the transmission gear (27) extends into the empty slot (32) and engages with the second rack rail (33).

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