A foldable forklift shelf

Abstract

The present invention discloses a foldable forklift backrest rack, which relates to the technical field of forklift accessories, and aims to solve the problem of high material performance requirements of existing foldable backrest racks and forks. The key points of its technical solution are: it includes a rack and two sets of extension racks, both sides of the rack are slidably provided with a rotating rack 1, and the extension rack is fixedly provided with a rotating rack 2, and the rotating rack 1 and the rotating rack 2 on the same side form a mutual rotation connection, and the rack is provided with a plurality of driving members, and the driving members drive the rotating rack 1. In the foldable forklift backrest rack of the present invention, during normal handling, the extension rack and the rack are only kept in a fitted state, and the fork and the rack are kept in a normal embedded state, and the performance of the fork and the rack are the same as those of ordinary forks and backrest racks, so that forks of the same type can be adapted to each other, reducing the difficulty of maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of forklift accessories, and more particularly to a foldable forklift shelf. Background Art

[0002] A forklift is a piece of equipment commonly used for handling and can be adapted to a variety of different needs.

[0003] The components of existing forklifts for handling are generally mainly forks. However, when the forklift needs to be driven without a load, the setting of the forks requires the driver to estimate the inertia margin during driving. The existing solutions for adjusting the forks are mostly to fold the forks to form a vertical shape and parallel to the shelf. However, such shelf guards need to take into account the pulling force of the forks and the shelf guards, which requires higher performance requirements for the materials used for the forks and the shelf guards, and the structure is more complicated. For users, if there is a malfunction due to the structure of the forks, it is easy to cause inconvenience to the production process.

[0004] Therefore, a new solution needs to be proposed to supplement the existing forklift categories. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a foldable forklift cargo rack.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical scheme: a foldable forklift cargo shelf, comprising a shelf and two sets of extension frames, wherein a rotating frame 1 is slidably arranged on both side edges of the shelf, a rotating frame 2 is fixedly arranged on the extension frame, the rotating frame 1 and the rotating frame 2 on the same side are rotatably connected to each other, a plurality of driving members are arranged on the shelf, the driving members drive the rotating frame 1, a sliding groove for the rotating frame 1 to slide is opened on the shelf, the rotating frame 2 can abut against the sliding groove area of ​​the shelf, an elastic member is arranged between the rotating frame 1 and the rotating frame 2, and a circuit is arranged between the driving member, the shelf, the rotating frame 1, the rotating frame 2 and the extension frame.

[0007] The present invention is further configured as follows: the driving component is configured as a stepper motor, a lead screw and a slider; the stepper motor is fixedly arranged on a frame and drives the lead screw; the lead screw and the slider form a lead screw transmission; the slider is fixedly connected to a rotating frame; a plurality of blocks that can abut against the slider are provided in a slide groove area of ​​the frame; the blocks are rotationally connected to the lead screw.

[0008] The present invention is further configured as follows: a rotating shaft is arranged between the rotating frame 1 and the rotating frame 2, and a first engaging groove for rotating the rotating shaft is opened on the rotating frame 1 and the rotating frame 2. The rotation between the rotating frame 1 and the rotating frame 2 takes the rotating shaft as the rotation axis, and abutment blocks are fixedly arranged at both ends of the rotating shaft.

[0009] The present invention is further configured as follows: the lengths of the two sets of rotating frames 1 are different, the lengths of the two sets of rotating frames 2 are also different, and the rotating frames 1 and 2 are matched in length.

[0010] The present invention is further configured as follows: the cross section of the rotating shaft is formed into a structure combining a circle and a convex ridge, the cross section of the first engaging groove is formed into a structure combining a circle and a sector, and the rotating shaft can abut against the inner wall of the first engaging groove.

[0011] The present invention is further configured as follows: the elastic member is configured as a torsion spring, the torsion spring is sleeved on a rotating shaft, a second engaging groove for sleeved and rotated by the torsion spring is provided on the rotating shaft, and two ends of the torsion spring respectively abut against rotating frame one and rotating frame two.

[0012] The present invention is further configured as follows: a third interlocking groove is provided on the extension frame, the circuit runs through the third interlocking groove area, and a switch for controlling the circuit path is provided on the inner wall of the third interlocking groove, and a spring is provided on the switch, and the spring pushes the switch to put the switch in a normally open state.

[0013] The present invention is further configured as follows: a control panel and a button are fixedly arranged on the shelf, the control panel controls the stepper motor, two buttons are arranged, and can respectively form abutment with two sets of extension frames, and when the button is pressed, the stepper motor drives the slider to move in the direction of the stepper motor itself through the lead screw and the process is stopped.

[0014] The present invention is further configured as follows: a traction member 1 is rotatably provided on the rotating frame 1, and a limiting column 1 and a limiting column 2 are fixedly provided; a traction member 2 is fixedly provided on the rotating frame 2; a pull belt is fixedly provided between the traction member 1 and the traction member 2; the middle section of the pull belt can form abutment with the limiting column 1 and the inner wall of the slide groove; and the traction member 1 can form abutment with the limiting column 2 and the inner wall of the slide groove when rotating.

[0015] In summary, the present invention has the following beneficial effects:

[0016] 1. In the normal handling process, the extension frame and the frame are only kept in a close fit state, and do not participate in the support of the fork when carrying items, which reduces the requirements for material performance. The fork needs to be fixed in the frame area for use, so that the performance of the frame is the same as that of the backrest frame. At the same time, the same type of forks can be mutually adapted between the backrest frame of the present invention and the ordinary backrest frame, which reduces the difficulty of maintenance personnel to maintain the forklift;

[0017] 2. Compared with the existing folding fork solution, this solution only expands the baffle plate so that it can drive the two forks to form a cross storage, while the fork still uses the traditional fork, which ensures the original reliability of the fork and avoids the possible failure of the existing folding fork solution;

[0018] 3. After the driver moves the fork from the rack to the extension rack, the extension rack can be rotated on the rack to achieve a folding effect on the fork, making it easier for the driver to drive the forklift to shuttle between various areas. At the same time, the driver can pay less attention to the fork and shift his attention to driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure between the rotating frame 1, the rotating frame 2 and the rotating shaft;

[0022] Figure 4 is a schematic diagram of the structure between the rotating shaft and the elastic member;

[0023] Figure 5 It is a schematic diagram of the back structure of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the extension frame and the frame when the fork is installed;

[0025] Figure 7 It is a schematic diagram of the structure when the right extension frame in the figure is rotatable when a fork is provided;

[0026] Figure 8 It is a schematic diagram of the structure when the left extension frame in the figure is rotatable when a fork is provided;

[0027] Fig. 9 It is a schematic diagram of the structure after the extension frame is rotated when a fork is installed;

[0028] Fig.10 It is a partial structural schematic diagram when the rotating frame 1 and the rotating frame 2 on one side are perpendicular to each other;

[0029] Fig.11 It is a partial structural schematic diagram when the rotating frame 1 and the rotating frame 2 on one side are parallel to each other.

[0030] In the figure: 1, rack; 2, extension rack; 3, rotating rack 1; 4, rotating rack 2; 5, slide groove; 6, elastic member; 8, stepping motor; 9, lead screw; 10, slider; 11, stopper; 12, rotating shaft; 13, first fitting groove; 14, abutment block; 15, second fitting groove; 16, third fitting groove; 17, switch; 18, spring piece; 19, control panel; 20, button; 21, traction member 1; 22, limit column 1; 23, limit column 2; 24, traction member 2; 25, pull belt. DETAILED DESCRIPTION

[0031] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] A foldable forklift backrest, such as Figure 1-Figure 11As shown, it includes a rack 1 and two sets of extension racks 2. Both sides of the rack 1 are slidably provided with a rotating rack 1 3. The extension rack 2 is fixedly provided with a rotating rack 2 4. The rotating rack 1 3 and the rotating rack 2 4 on the same side are rotatably connected. The rack 1 is provided with a plurality of driving members, and the driving members drive the rotating rack 1 3. The rack 1 is provided with a slide groove 5 for the rotating rack 1 3 to slide. The rotating rack 2 4 can form abutment with the slide groove 5 area of ​​the rack 1. An elastic member 6 is provided between the rotating rack 1 3 and the rotating rack 2 4. The space between the rack 1 and the extension rack 2 can support the cargo of a forklift. The forks move horizontally without being affected by each other. When the forks are fixed in the extension frame 2 area, the driving member pushes the rotating frame 1 3 and the rotating frame 2 4 to push out the extension frame 2, and driven by the elastic member 6, the position of the forks is changed, so that the forks are changed from the original position facing the front of the vehicle to a state parallel to the frame 1. This state is easy for the driver to ensure safety when driving the forklift for long distances, avoiding the danger that may be caused by the extension of the forks. A circuit is set between the driving member, the frame 1, the rotating frame 1 3, the rotating frame 2 4 and the extension frame 2, and the driving member It is configured as a stepper motor 8, a lead screw 9 and a slider 10. The stepper motor 8 is fixedly arranged on the frame 1 and drives the lead screw 9. The lead screw 9 and the slider 10 form a lead screw transmission. The slider 10 is fixedly connected to the rotating frame 1 3. The frame 1 is provided with a plurality of blocks 11 in the slide groove 5 area that can abut against the slider 10. The block 11 is rotatably connected to the lead screw 9. The rotation of the stepper motor 8 drives the lead screw 9 to rotate, so that the slider 10 pushes or pulls the rotating frame 1 3, thereby realizing the control of the position of the rotating frame 2 4 and the mutual control between the rotating frame 1 3 and the rotating frame 2 4. When the rotating frame 2 4 is pushed out, it will form a continuous abutment state with the inner wall of the slide groove 5, and when the abutment point separates from the rotating frame 2 4, it will be driven by the elastic member 6 to rotate in the original direction of the fork. When the rotating frame 1 3 is recovered by the stepping motor 8 and the lead screw 9, the rotating frame 2 4 abuts against the inner wall of the slide groove 5, thereby pushing the rotating frame 2 4 to rotate in a direction parallel to the rotating frame 1 3, so that the rotating frame 2 4 can also be collected into the slide groove 5 area, and the extension frame 2 is fitted on the side of the rack 1.

[0033] The lengths of the two sets of rotating frames 1 3 are different, and the lengths of the two sets of rotating frames 2 4 are also different. The rotating frames 1 3 and 2 4 are matched in length. The long rotating frame 1 3 is rotatably connected to the short rotating frame 2 4, and the short rotating frame 1 3 is rotatably connected to the long rotating frame 2 4. In this way, when the rotating frame 1 3 is pushed out, the starting rotation times of the two rotating frames 2 4 are incompatible with each other. At the same time, after the two rotating frames 2 4 have completed their rotation, the distances between the two rotating frames 2 4 and the frame 1 are also different, which avoids the situation where the two rotating frames 2 4 abut against each other and cannot rotate smoothly.

[0034] A rotating shaft 12 is arranged between the rotating frame 1 3 and the rotating frame 2 4, and a first engaging groove 13 for the rotating shaft 12 to rotate is opened on the rotating frame 1 3 and the rotating frame 2 4. The rotation between the rotating frame 1 3 and the rotating frame 2 4 takes the rotating shaft 12 as the rotating axis, and abutment blocks 14 are fixedly arranged at both ends of the rotating shaft 12. The cross section of the rotating shaft 12 is formed into a structure combining a circle and a convex ridge, and the cross section of the first engaging groove 13 is formed into a structure combining a circle and a sector. The rotating shaft 12 can form an abutment with the inner wall of the first engaging groove 13. The setting of the rotating shaft 12 can form a position limit for the mutual rotation between the rotating frame 1 3 and the rotating frame 2 4, as well as a limit on the rotation angle, so that the forks of the forklift can be Driven by the rotating frame 2 and the extension frame 2, it forms a rotation within a range of 90°, and the rotating shaft 12 forms an abutment with the inner wall of the fan-shaped area of ​​the first engaging groove 13 through the area of ​​its convex ridges to form a rotation limit, and the elastic member 6 is configured as a torsion spring, which is sleeved on the rotating shaft 12, and a second engaging groove 15 for the torsion spring to be sleeved and rotated is provided on the rotating shaft 12. The two ends of the torsion spring respectively form an abutment with the rotating frame 1 3 and the rotating frame 2 4. When the rotating frame 1 3 pushes the rotating frame 2 4 out of the slide groove 5, the torsion spring is configured to push the rotating frame 2 4 to rotate on the rotating frame 1 3 after leaving the abutment with the inner wall of the slide groove 5, thereby driving the forklift's fork to rotate to a state parallel to the shelf.

[0035] A third engaging groove 16 is provided on the extension frame 2, and the circuit runs through the area of ​​the third engaging groove 16. A switch 17 for controlling the circuit path is provided on the inner wall of the third engaging groove 16. A spring 18 is provided on the switch 17, and the spring 18 pushes the switch 17 to make the switch 17 in a normally open state. A positioning pin is provided on the fork of the forklift to fix the position of the fork on the shelf. The third engaging groove 16 is provided for the positioning pin to extend into and fix the position of the fork. When the positioning pin is embedded in the third engaging groove 16, the positioning pin presses against the spring 18, thereby forming a connection between the spring 18 and the switch 17, so that the entire circuit can form a path. When the positioning pin is pulled out, the switch 17 is released under the push of the spring 18, thereby forming a circuit break, thereby achieving an emergency stop effect.

[0036] A control panel 19 and a button 20 are fixedly provided on the shelf 1. The control panel 19 controls the stepper motor 8. The user can control the stepper motor 8 to rotate by operating the control panel 19. Two buttons 20 are provided, which can respectively abut against the two sets of extension frames 2. When the button 20 is pressed, the stepper motor 8 drives the slider 10 to move in the direction of the stepper motor 8 itself through the lead screw 9. The button 20 is set to be used when the stepper motor 8 is running and drives the rotating frame 2 4 to move to the area in the slide groove 5. When the extension frame 2 is about to come into contact with the shelf backing, the extension frame 2 will first abut against the button 20 and press the button 20, thereby forming a signal output to the control panel 19 to prevent the stepper motor 8 from rotating further, so as to ensure that the extension frame 2 can fit on the side of the shelf backing and will not cause corresponding damage to the lead screw 9 and the slider 10.

[0037] A traction member 21 is rotatably arranged on the rotating frame 1 3, and a limiting column 1 22 and a limiting column 23 are fixedly arranged. A traction member 24 is fixedly arranged on the rotating frame 2 4. A pull belt 25 is fixedly arranged between the traction member 1 21 and the traction member 2 24. The middle section of the pull belt 25 can form abutment with the limiting column 1 22 and the inner wall of the slide groove 5. When the traction member 21 rotates, it can form abutment with the limiting column 23 and the inner wall of the slide groove 5. The rotating frame 1 3 and the rotating frame 2 4 are During the process of pushing out the chute 5, the contact relationship between the rotating frame 24 and the inner wall of the chute 5 is released, and the rotating frame 24 rotates under the push of the elastic member 6, but it is pulled by the drawstring 25, so that its rotation is restricted. The pulling force exerted on the drawstring 25 will pull the traction member 1 21, and cause the traction member 1 21 to abut against the inner wall of the chute 5, and when the rotating frame 1 3 gradually extends out of the chute 5, it rotates outward, so that the drawstring 25 exerts pressure on the traction member 24. When the pull is gradually relaxed, the elastic member 6 pushes the rotating frame 24 so that the rotating frame 24 rotates to be perpendicular to the rotating frame 1 3. When the vertical directions between the rotating frame 1 3 and the rotating frame 24 change to be parallel to each other, the rotating frame 1 3 retracts into the slide groove 5, and the inner wall of the slide groove 5 abuts against the drawstring 25. During the abutment of the drawstring 25, the traction member 1 21 and the traction member 2 24 are pulled, so that the traction member 2 24 drives the rotating frame 24 to rotate. The traction member 1 21 serves as the fulcrum of the drawstring 25. After the drawstring 25 is squeezed by the inner wall of the slide groove 5, it abuts against the inner wall of the slide groove 5, and finally forms a recovery in the direction of the rotating frame 1 3. When the rotating frame 1 3 is perpendicular to the rotating frame 2 4, the drawstring 25 is straightened, and the limiting column 23 abuts against the traction member 1 21, limiting the rotating frame 24 from continuing to rotate in the direction of the rack 1. The drawstring 25 is made of steel wire rope.

[0038] Working principle: when the user is retracting the fork to be parallel to the shelf, the user needs to first move the fork to the third engaging groove 16 area, and insert the locating pin provided on the fork from the fork to the third engaging groove 16 area, so that the fork can be fixed on the extension frame 2. At the same time, the position of the locating pin is fixed so that the switch 17 is pressed and a circuit path is formed, and the user can operate the control board 19. At this time, the stepper motor 8 can only drive the lead screw 9 to push the slider 10 in the direction away from the stepper motor 8. In the process of the rotating frame 2 4 being gradually pushed out of the slide groove 5, the contact point between the rotating frame 2 4 and the slide groove 5 gradually moves from the rotating frame 2 4 to the direction of the rotating frame 1 3, and finally separates from the rotating frame 2 4. When the contact force between the rotating frame 2 4 and the slide groove 5 is reduced to disappear, the torsion spring will push the rotating frame 2 4, so that the state between the rotating frame 2 4 and the rotating frame 1 3 changes from being parallel to each other. When the forklift is in a state of being perpendicular to each other, the rotating frame 3 rotates together with the extension frame 2 and the cargo fork fixed on the extension frame 2, thereby realizing the storage of the cargo fork, and the user can drive the forklift in a state in which the cargo fork is parallel to the cargo shelf. During the driving of the forklift, the driver and other people do not have to worry about the dangerous situation caused by the cargo fork. When the user operates the control panel 19 to pull the rotating frame 3 back, the rotating frame 2 4 will gradually rotate to a state parallel to the rotating frame 3 under the abutment with the inner wall of the slide groove 5, and retract to the slide groove 5 area under the continued movement of the rotating frame 3. At this time, the extension frame 2 moves with the rotating frame 2 4, and the cargo fork also changes from a state parallel to the shelf 1 to a state perpendicular to each other. The rotation of the stepper motor 8 stops when the button 20 is pressed by the extension frame 2. At this time, the extension frame 2 also abuts against the shelf 1, and the track for the movement of the shelf formed between the extension frame 2 and the shelf 1 is also connected with each other.

[0039] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A foldable forklift backrest, characterized by: The invention comprises a frame (1) and two sets of extension frames (2), wherein a rotating frame (3) is slidably arranged on both sides of the frame (1), a rotating frame (4) is fixedly arranged on the extension frame (2), and the rotating frame (3) and the rotating frame (4) on the same side are rotatably connected to each other, a plurality of driving members are arranged on the frame (1), and the driving members drive the rotating frame (3), a slide groove (5) for the rotating frame (3) to slide is opened on the frame (1), and the rotating frame (4) can abut against the slide groove (5) area of ​​the frame (1), an elastic member (6) is arranged between the rotating frame (3) and the rotating frame (4), and a circuit is arranged between the driving member, the frame (1), the rotating frame (3), the rotating frame (4) and the extension frame (2).

2. A foldable forklift backrest according to claim 1, characterized in that: The driving member is configured as a stepping motor (8), a lead screw (9) and a slider (10); the stepping motor (8) is fixedly mounted on the frame (1) and drives the lead screw (9); the lead screw (9) and the slider (10) form a lead screw transmission; the slider (10) is fixedly connected to a rotating frame (3); a plurality of blocks (11) capable of abutting against the slider (10) are disposed in the slide groove (5) region of the frame (1); the blocks (11) are rotationally connected to the lead screw (9).

3. The foldable forklift backrest rack according to claim 1, characterized in that: A rotating shaft (12) is arranged between the rotating frame 1 (3) and the rotating frame 2 (4); a first engaging groove (13) for the rotating shaft (12) to rotate is provided on the rotating frame 1 (3) and the rotating frame 2 (4); the rotating shaft (12) is used as the rotating axis for the rotation between the rotating frame 1 (3) and the rotating frame 2 (4); and abutment blocks (14) are fixedly arranged at both ends of the rotating shaft (12).

4. The foldable forklift backrest rack according to claim 1, characterized in that: The lengths of the two sets of rotating frames 1 (3) are different, and the lengths of the two sets of rotating frames 2 (4) are also different. The rotating frames 1 (3) and 2 (4) are matched in length.

5. The foldable forklift backrest rack according to claim 3, characterized in that: The cross section of the rotating shaft (12) is formed into a structure combining a circle and a convex ridge, the cross section of the first fitting groove (13) is formed into a structure combining a circle and a sector, and the rotating shaft (12) can abut against the inner wall of the first fitting groove (13).

6. The foldable forklift backrest rack according to claim 3, characterized in that: The elastic member (6) is configured as a torsion spring, which is sleeved on a rotating shaft (12). The rotating shaft (12) is provided with a second engaging groove (15) for the torsion spring to be sleeved and rotated. The two ends of the torsion spring respectively form abutment with the rotating frame 1 (3) and the rotating frame 2 (4).

7. The foldable forklift backrest rack according to claim 1, characterized in that: The extension frame (2) is provided with a third engaging groove (16), the circuit runs through the area of ​​the third engaging groove (16), and a switch (17) for controlling the circuit path is provided on the inner wall of the third engaging groove (16), and a spring (18) is provided on the switch (17), and the spring (18) pushes the switch (17) to put the switch (17) in a normally open state.

8. The foldable forklift backrest rack according to claim 2, characterized in that: A control panel (19) and a button (20) are fixedly mounted on the rack (1). The control panel (19) controls the stepper motor (8). Two buttons (20) are provided and can respectively abut against two sets of extension racks (2). When the button (20) is pressed, the stepper motor (8) drives the slider (10) to move in the direction of the stepper motor (8) itself via the lead screw (9), and the movement process is stopped.

9. The foldable forklift backrest rack according to claim 1, characterized in that: A traction member 1 (21) is rotatably arranged on the rotating frame 1 (3), and a limiting column 1 (22) and a limiting column 2 (23) are fixedly arranged. A traction member 2 (24) is fixedly arranged on the rotating frame 2 (4). A pull belt (25) is fixedly arranged between the traction member 1 (21) and the traction member 2 (24). The middle section of the pull belt (25) can form abutment with the limiting column 1 (22) and the inner wall of the slide groove (5). When the traction member 1 (21) rotates, it can form abutment with the limiting column 2 (23) and the inner wall of the slide groove (5).

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