Telescopic pallet fork structure

Abstract

The utility model relates to the technical field of pallet forks, and discloses a telescopic pallet fork structure which comprises pallet forks connected to the left side and the right side of a pallet fork base in a sliding mode, an inhaul cable structure is arranged in the pallet fork base, the inhaul cable structure comprises a power device, two inhaul cables penetrate through the power device, and the power device is used for driving the two inhaul cables to move; the middle parts of the two inhaul cables are in transmission connection in the inhaul cables, and the front end and the rear end of each corner steering roller are fixed to the front end and the rear end of the same pallet fork respectively; the corner steering idler wheels are arranged at the corners of the front plate and the side plates and used for steering the inhaul cables, the middle portions of the rear ends of the inhaul cables penetrate through the multiple supporting wheels and are wound in wire grooves of the supporting wheels, and at least two supporting wheels rotationally connected to the side faces of the side plates are arranged in a telescopic sliding groove in the inner side of one pallet fork. The upper and lower sides of the supporting wheel are attached to the upper and lower surfaces of the telescopic chute. The telescopic pallet fork structure has the advantages of being telescopic, capable of transporting cloth rolls, high in efficiency, full-automatic and high in stability.

Description

Technical Field

[0001] The utility model relates to the technical field of forklift forks, in particular to a telescopic forklift fork structure. Background Art

[0002] The existing forklift forks have a simple structure and cannot meet the two requirements of handling freight station boards and handling cloth rolls at the same time. Longer forklift forks are required for handling freight boards, while shorter forklift forks are required for handling cloth rolls. Moreover, the cylindrical structure of the cloth roll is prone to roll off the forklift forks.

[0003] Patent No. CN103708386A discloses a length-adjustable forklift fork for a forklift, which is installed on the forklift fork lifting mechanism and includes a forklift fork body. The forklift fork body includes a mounting arm that is used to install and connect the forklift fork lifting mechanism and is vertically arranged. The lower end of the mounting arm is connected with a horizontally arranged goods shoveling arm. The goods shoveling arm includes a fixed arm sleeve fixedly connected with the mounting arm. A telescopic arm is movably installed in the fixed arm sleeve. A telescopic locking device is arranged between the fixed arm sleeve and the telescopic arm; the length of the goods shoveling arm can be adjusted.

[0004] By analyzing the existing telescopic forklift fork structures, it is found that there are still the following defects: 1. When transporting cloth rolls, the cloth rolls are prone to roll or even fall on the forklift forks, which is neither safe nor conducive to transportation efficiency; 2. The telescoping of the forklift forks requires manual adjustment, with low efficiency; 3. The existing forklift fork telescoping structures all extend outward on the basis of the original normal length, while shorter forklift forks are required for transporting cloth rolls; 4. In most of the current technologies, the socketing method is used, which has poor stability and the existing gaps are prone to generate vibrations. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the utility model provides a telescopic forklift fork structure, which has the advantages of being telescopic, capable of transporting cloth rolls, high efficiency, fully automatic and strong stability, and solves the problems in the above background art.

[0007] (2) Technical Solutions

[0008] To achieve the above object, the utility model provides the following technical solutions:

[0009] A telescopic forklift fork structure includes forklift forks. Two forklift forks are slidably connected to the left and right sides of a forklift fork seat. A downwardly concave winding groove is arranged at the top of the front half of the forklift forks. The forklift fork seat includes a front plate and side plates on both sides. A cable structure is arranged in the forklift fork seat. The cable structure includes:

[0010] A power device. Two cables pass through the power device. The power device is used to drive the two cables to move;

[0011] The cable, the middle parts of two cables are drivingly connected inside the cable, and the front and rear ends of each corner turning roller are respectively fixed at the front and rear ends of the same fork or positions near the front and rear ends;

[0012] The corner turning roller is arranged at the corner of the front plate and the side plate and is used for turning the cable. The middle part of the rear end of the cable passes through a plurality of support wheels and is wound in the wire grooves of the support wheels. At least two support wheels rotatably connected to the side of the side plate are arranged in the telescopic chute on the inner side of a fork, and the upper and lower sides of the support wheels are attached to the upper and lower surfaces of the telescopic chute.

[0013] Preferably, the power device includes:

[0014] A telescopic motor, fixed to the back of the front plate, and a power wheel is fixed at the output shaft of the telescopic motor;

[0015] The power wheel is arranged on the front side of the front plate. There are two front and rear wire grooves on the power wheel, and the middle parts of each cable are respectively wound in the two front and rear wire grooves;

[0016] The height turning rollers are respectively arranged on the left and right sides of the power wheel. There are two front and rear wire grooves on the height turning rollers, and the front and rear parts of each cable respectively pass through the two wire grooves of the height turning rollers.

[0017] Preferably, both the power wheel and the height turning rollers are arranged in the power box. The power box is fixed to the front side of the front plate. The power box is provided with a roller chute at the position corresponding to the height turning rollers. The height turning rollers slide up and down in the roller chute. A support rod is connected to the top of the middle position of the height turning rollers. A rotating ring is fixed to the bottom of the support rod. The rotating ring is rotatably connected to the position between the two wire grooves on the height turning rollers. A sliding hole is provided on the outer shell of the power box. The top of the support rod is slidably connected in the sliding hole. A pressure regulating device is arranged at the position corresponding to the top of the sliding hole on the outside of the power box. The pressure regulating device is threadedly connected to the power box. A pressure ejector rod is arranged at the bottom of the pressure regulating device. The bottom of the pressure ejector rod is slidably connected in the sliding hole. A spring is arranged between the top of the support rod and the pressure ejector rod. A pressure sensor is arranged at the position of the pressure ejector rod inside the pressure regulating device. By rotating the pressure regulating device to adjust the height of the pressure regulating device, the pressing force of the pressure ejector rod is adjusted, so as to adjust the squeezing force of the height turning rollers on the cable, achieve the purpose of controlling the tightness of the cable, and can also monitor the tightness of the cable in real time.

[0018] Preferably, the rotating shaft of the height turning roller is horizontally perpendicular to the front side of the front plate, and the front and rear ends of the rotating shaft of the height turning roller are respectively slidably connected in the chutes of the box cover and the power box.

[0019] Preferably, the rotating seat of the corner turning roller is fixed at the corner of the front plate and the side plate. The roller of the corner turning roller is vertically rotatably connected to the rotating seat. Two wire grooves, upper and lower, are arranged on the roller of the corner turning roller, and the front and rear ends of the same cable are respectively passed through the two wire grooves for turning the cable.

[0020] Preferably, a box cover is arranged on the front side of the power box, and a pressing block is arranged on the inner side of the box cover corresponding to the position of the roller chute.

[0021] Preferably, the end of the cable is bent into a ring shape and fixed by a fixing buckle to form a collar. A fixing hole is arranged on the fork corresponding to the end of the cable, and the end of the cable is fixed in the fixing hole by a bolt.

[0022] (III) Advantageous Effects

[0023] Compared with the prior art, the present utility model provides a telescopic fork structure, which has the following advantageous effects:

[0024] 1. In this telescopic fork structure, the fork is slidably connected to the fork seat. When it is necessary to carry a pallet, the fork can be extended. A downwardly concave winding groove is arranged at the top of the front half of the fork. When it is necessary to carry a cloth roll, the fork is retracted and the cloth roll falls into the winding groove, so that the instability caused by the forward center of gravity during the transportation of the cloth roll can be avoided, and the winding groove can prevent the cloth roll from rolling.

[0025] 2. In this telescopic fork structure, a plurality of rotatably connected support wheels are arranged in the fork. When the cable passes through the support wheels, it is wound around the support wheels. Thus, while the cable pulls the fork to move back and forth, it drives the support wheels to rotate. The frictional force generated by the rotation of the support wheels assists the fork to slide, so that the support wheels can be closely attached to the inner wall of the telescopic chute without affecting the forward and backward sliding of the fork, improving the stability of the fork.

[0026] 3. In this telescopic fork structure, the height turning roller is slidably arranged up and down in the power box, and a pressure regulating device is arranged on the power box. The support rod at the top of the height turning roller is connected to the pressure ejector rod at the bottom of the pressure regulating device through a sliding hole. By rotating the pressure regulating device, the pressing force of the support rod can be adjusted, so as to adjust the pressing force of the height turning roller, and thus adjust the tension of the cable. At the same time, the pressure sensor in the pressure regulating device can also real-time monitor the tension of the cable. When the load on the fork is too large and the fork tilts, it will also affect the tension of the cable, so as to real-time monitor the load-bearing state on the fork. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of the telescopic fork structure of the present utility model.

[0028] Figure 2This is a schematic diagram of the internal structure of the fork seat of the telescopic fork structure of the present utility model.

[0029] Figure 3 It is Figure 2 a schematic diagram of the structure of area A in

[0030] Figure 4 This is a schematic diagram of the front plate of the telescopic fork structure of the present utility model.

[0031] Figure 5 This is a schematic diagram of the side plate of the telescopic fork structure of the present utility model.

[0032] Figure 6 This is a schematic diagram of the cable structure of the telescopic fork structure of the present utility model.

[0033] Figure 7 This is a schematic diagram of the fork of the telescopic fork structure of the present utility model.

[0034] Figure 8 This is a schematic diagram of the power device of the telescopic fork structure of the present utility model.

[0035] Figure 9 This is a schematic diagram of the power box and the box cover of the telescopic fork structure of the present utility model.

[0036] Figure 10 This is a schematic diagram of the pressure regulating device of the telescopic fork structure of the present utility model.

[0037] In the figure: 1. Fork; 11. Coiling groove; 12. Telescopic sliding groove; 13. Fixed hole; 2. Fork seat; 21. Front plate; 22. Side plate; 221. Support wheel; 3. Cable structure; 31. Power device; 32. Cable; 33. Corner turning roller; 321. Fixed buckle; 311. Telescopic motor; 312. Power wheel; 313. Height turning roller; 314. Power box; 3141. Roller sliding groove; 3142. Wire outlet sliding groove opening; 315. Box cover; 3151. Pressing block; 316. Support rod; 317. Sliding hole; 318. Spring; 319. Pressure regulating device. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0039] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] Embodiment 1:

[0042] This embodiment provides a telescopic fork structure having the following technical features.

[0043] See also Figures 1-10 A telescopic fork structure includes a fork 1, two forks 1 are slidably connected to the left and right sides of a fork seat 2, a downwardly concave roll groove 11 is provided at the top of the front half of the fork 1, the fork seat 2 includes a front plate 21 and side plates 22 on both sides, a cable structure 3 is provided in the fork seat 2, and the cable structure 3 includes:

[0044] A power device 31, wherein two cables 32 pass through the power device 31, and the power device 31 is used to drive the two cables 32 to move;

[0045] Cables 32, the middle parts of the two cables 32 are connected in the cables 32, and the front and rear ends of each corner steering roller 33 are respectively fixed to the front and rear ends of the same fork 1 or at positions close to the front and rear ends;

[0046] The corner steering roller 33 is arranged at the corner of the front plate 21 and the side plate 22, and is used to steer the cable 32. The middle part of the rear end of the cable 32 passes through multiple support wheels 221 and is wound in the wire groove of the support wheel 221. At least two support wheels 221 rotatably connected to the side of the side plate 22 are arranged in the telescopic slide 12 on the inner side of a fork 1, and the upper and lower sides of the support wheels 221 are attached to the upper and lower surfaces of the telescopic slide 12.

[0047] In an optional embodiment, the power device 31 includes:

[0048] The telescopic motor 311 is fixed to the back surface of the front plate 21, and a driving wheel 312 is fixed to the output shaft of the telescopic motor 311;

[0049] The driving wheel 312 is arranged on the front side of the front plate 21. There are two front and rear wire grooves on the driving wheel 312, and the middle parts of each cable 32 are respectively wound in the two front and rear wire grooves;

[0050] The height steering rollers 313 are respectively arranged on the left and right sides of the driving wheel 312. There are two front and rear wire grooves on the height steering rollers 313, and the front and rear parts of each cable 32 respectively pass through the two wire grooves of the height steering rollers 313.

[0051] In an optional embodiment, both the driving wheel 312 and the height steering rollers 313 are arranged in the power box 314. The power box 314 is fixed to the front side of the front plate 21. The power box 314 is provided with a roller chute 3141 at the position corresponding to the height steering rollers 313. The height steering rollers 313 slide up and down in the roller chute 3141. A support rod 316 is connected to the top of the middle position of the height steering rollers 313. A rotating ring is fixed to the bottom of the support rod 316, and the rotating ring is rotatably connected to the position between the two wire grooves on the height steering rollers 313. A sliding hole 317 is provided on the outer shell of the power box 314, and the top of the support rod 316 is slidably connected in the sliding hole 317. A pressure regulating device 319 is arranged at the position corresponding to the top of the sliding hole 317 on the outside of the power box 314. The pressure regulating device 319 is threadedly connected to the power box 314. A pressure ejector rod is arranged at the bottom of the pressure regulating device 319, and the bottom of the pressure ejector rod is slidably connected in the sliding hole 317. A spring 318 is arranged between the top of the support rod 316 and the pressure ejector rod. A pressure sensor is arranged at the position of the pressure ejector rod in the pressure regulating device 319. By rotating the pressure regulating device 319 to adjust the height of the pressure regulating device 319, the pressing force of the pressure ejector rod is adjusted, so as to adjust the squeezing force of the height steering rollers 313 on the cable 32, achieving the purpose of controlling the tightness of the cable 32, and the tightness of the cable 32 can also be monitored in real time.

[0052] In an optional embodiment, the rotating shaft of the height steering rollers 313 is horizontally perpendicular to the front side surface of the front plate 21, and the front and rear ends of the rotating shaft of the height steering rollers 313 are respectively slidably connected in the chutes of the box cover 315 and the power box 314.

[0053] In an optional embodiment, the rotating seat of the corner steering roller 33 is fixed at the corner of the front plate 21 and the side plate 22. The roller of the corner steering roller 33 is vertically rotatably connected to the rotating seat. There are two upper and lower wire grooves on the roller of the corner steering roller 33, and the front and rear ends of the same cable 32 respectively pass through them, for turning the cable 32.

[0054] In an optional embodiment, a box cover 315 is provided on the front side of the power box 314, and a pressing block 3151 is provided on the inner side of the box cover 315 corresponding to the position of the roller chute 3141.

[0055] In an optional embodiment, the end of the cable 32 is bent into a ring shape and fixed by a fixing buckle 321 to form a loop. A fixing hole 13 is provided on the fork 1 corresponding to the end of the cable 32, and the end of the cable 32 is fixed in the fixing hole 13 by setting a bolt.

[0056] Specifically, a wire outlet chute opening 3142 is provided at the position of the cable 32 outlet on the side of the power box 314.

[0057] Specifically, the front plate 21 and the side plate 22 are integral, or are detachably fixed together by bolts, or are fixed together by welding.

[0058] Specifically, the rotating seat of the corner steering roller 33 is fixed on the front plate 21 or on the side plate 22, and the roller of the corner steering roller 33 is located in front of the front plate 21.

[0059] Specifically, a plurality of winding grooves 11 can be provided on one fork 1, and the positions of the winding grooves 11 on the two forks 1 correspond one by one.

[0060] Specifically, the fork seat 2 is slidably connected to the automatic guided vehicle AGV, and a vertical slide rail is provided inside the fork seat 2.

[0061] Working principle: The telescopic motor 311 drives the driving wheel 312 to rotate. The cables 32 wound in the front and rear wire grooves of the driving wheel 312 start to rotate under the influence of the friction force generated by the rotation of the driving wheel 312. When the telescopic motor 311 rotates forward, the front ends of the two cables 32 are pulled backward and the rear ends are pulled forward. Since the front and rear ends of the cable 32 are respectively fixed to the front and rear ends of the fork 1, the fork 1 retracts inward. When the telescopic motor 311 rotates reversely, the fork 1 extends outward, realizing the forward and backward movement of the fork 1. At the same time, since a part of the rear end of the cable 32 is wound around the support wheel 221, the cable 32 drives the support wheel 221 to rotate during the movement. The rotation direction of the support wheel 221 is the same as the movement direction of the fork 1, which can drive the fork 1 to move. Therefore, even if the support wheel 221 is closely attached to the inside of the fork 1, the expansion and contraction of the fork 1 will not be affected by the friction force.

[0062] In summary, for the telescopic forklift structure, the forklift 1 is slidably connected to the forklift seat 2, and when it is necessary to carry a pallet, the forklift 1 can be extended. A downwardly concave winding groove 11 is provided at the top of the front half of the forklift 1. When it is necessary to carry a cloth roll, the forklift 1 is retracted, and the cloth roll falls into the winding groove 11, so that the instability caused by the forward center of gravity can be avoided when carrying the cloth roll, and the winding groove 11 can prevent the cloth roll from rolling.

[0063] For the telescopic forklift structure, a plurality of rotatably connected support wheels 221 are arranged in the forklift 1. When the cable 32 passes through the support wheels 221, it is wound around the support wheels 221. Thus, while the cable 32 pulls the forklift 1 to move back and forth, it drives the support wheels 221 to rotate. The frictional force generated by the rotation of the support wheels 221 assists the sliding of the forklift 1, so as to achieve the effect that while the support wheels 221 are closely attached to the inner wall of the telescopic chute 12, it does not affect the forward and backward sliding of the forklift 1, and improves the stability of the forklift 1.

[0064] For the telescopic forklift structure, the height steering roller 313 is slidably arranged up and down in the power box 314, and a pressure regulating device 319 is arranged on the power box 314. The support rod 316 at the top of the height steering roller 313 is connected to the pressure ejector rod at the bottom of the pressure regulating device 319 through a sliding hole 317. By rotating the pressure regulating device 319, the pressing force of the support rod 316 can be adjusted, thereby adjusting the pressing force of the height steering roller 313, and also adjusting the tension of the cable 32. At the same time, the pressure sensor in the pressure regulating device 319 can also monitor the tension of the cable 32 in real time. When the load on the forklift 1 is too large and the forklift 1 tilts, it will also affect the tension of the cable 32, so as to monitor the load-bearing state on the forklift 1 in real time.

[0065] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0066] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A telescopic fork structure, comprising a fork (1), characterized in that, Two forklift forks (1) are slidably connected to the left and right sides of the forklift fork seat (2). A downwardly concave winding groove (11) is provided at the top of the front half of the forklift fork (1). The forklift fork seat (2) includes a front plate (21) and side plates (22) on both sides. A cable structure (3) is provided inside the forklift fork seat (2). The cable structure (3) includes: A power device (31). Two cables (32) pass through the power device (31), and the power device (31) is used to drive the two cables (32) to move. Cables (32). The middle parts of the two cables (32) are drivingly connected inside the cable (32). The front and rear ends of each corner turning roller (33) are respectively fixed at the front and rear ends of the same forklift fork (1) or at positions close to the front and rear ends. Corner turning rollers (33) are provided at the corners of the front plate (21) and the side plates (22) for turning the cables (32). The middle part of the rear end of the cable (32) passes through a plurality of support rollers (221) and is wound in the wire grooves of the support rollers (221). At least two support rollers (221) rotatably connected to the side of the side plate (22) are provided in the telescopic chute (12) on the inner side of one forklift fork (1). The upper and lower sides of the support roller (221) are attached to the upper and lower surfaces of the telescopic chute (12).

2. The telescopic fork structure according to claim 1, characterized in that, The power device (31) includes: A telescopic motor (311) fixed to the back of the front plate (21). A power wheel (312) is fixed to the output shaft of the telescopic motor (311). The power wheel (312) is provided on the front side of the front plate (21). There are two front and rear wire grooves on the power wheel (312). The middle parts of each cable (32) are respectively wound in the two front and rear wire grooves. Height turning rollers (313) are respectively provided on the left and right sides of the power wheel (312). There are two front and rear wire grooves on the height turning rollers (313). The front and rear parts of each cable (32) respectively pass through the two wire grooves of the height turning rollers (313).

3. The telescopic fork structure according to claim 2, wherein, The driving wheel (312) and the height steering roller (313) are both arranged inside the power box (314). The power box (314) is fixed to the front side of the front plate (21). The power box (314) is provided with a roller chute (3141) at a position corresponding to the height steering roller (313). The height steering roller (313) slides up and down in the roller chute (3141). At the top of the middle position of the height steering roller (313), a support rod (316) is connected. At the bottom of the support rod (316), a rotating ring is fixed. The rotating ring is rotatably connected to a position between two wire grooves on the height steering roller (313). A sliding hole (317) is arranged on the outer shell of the power box (314). The top of the support rod (316) is slidably connected in the sliding hole (317). A pressure regulating device (319) is arranged on the outside of the power box (314) corresponding to the top of the sliding hole (317). The pressure regulating device (319) is threadedly connected to the power box (314). A pressure ejector rod is arranged at the bottom of the pressure regulating device (319). The bottom of the pressure ejector rod is slidably connected in the sliding hole (317). A spring (318) is arranged between the top of the support rod (316) and the pressure ejector rod. A pressure sensor is arranged at the position of the pressure ejector rod inside the pressure regulating device (319) for adjusting and detecting the tightness of the cable (32).

4. A telescopic fork structure according to claim 3, characterized in that, The rotating shaft of the height steering roller (313) is horizontally perpendicular to the front side of the front plate (21). The front and rear ends of the rotating shaft of the height steering roller (313) are respectively slidably connected in the chutes of the box cover (315) and the power box (314).

5. A telescopic fork structure according to claim 4, characterized in that, The rotating seat of the corner steering roller (33) is fixed at the corner of the front plate (21) and the side plate (22). The roller of the corner steering roller (33) is vertically rotatably connected to the rotating seat. Two upper and lower wire grooves are arranged on the roller of the corner steering roller (33), and the front and rear ends of the same cable (32) respectively pass through them for steering the cable (32).

6. A telescopic fork structure according to claim 5, characterized in that, A box cover (315) is arranged on the front side of the power box (314). A pressing block (3151) is arranged on the inner side of the box cover (315) corresponding to the roller chute (3141).

7. A telescopic fork structure according to claim 1, characterized in that, The end of the cable (32) is bent into a ring shape and fixed by a fixing buckle (321) to form a loop. A fixing hole (13) is arranged on the fork (1) corresponding to the end of the cable (32). The end of the cable (32) is fixed in the fixing hole (13) by a bolt.

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