Portable electric lifting forklift

Abstract

The invention relates to a portable electric lifting forklift. The portable electric lifting forklift comprises a primary frame; the first-stage frame is connected to the second-stage frame in a sliding mode in the first direction; the second-stage frame is connected to the fixed frame in a sliding mode in the first direction; the limiting mechanism comprises a lifting hook assembly and a hanging piece, the lifting hook assembly is arranged at the end, in the first direction, of the second-stage frame, the hanging piece is arranged on the first-stage frame, the lifting hook assembly comprises a lifting hook body and a torsional spring, the lifting hook body is rotationally connected with the second-stage frame and has a hooking and locking state and an avoiding state, and the lifting hook body in the hooking and locking state hooks the hanging piece; the torsional spring is used for clockwise resetting the lifting hook body from the avoiding state to the hooking and locking state, and the hanging piece is arranged to move along with the first-stage frame in the first direction so as to anticlockwise push the lifting hook body to rotate from the hooking and locking state to the avoiding state; according to the lifting forklift, the lifting height of the forklift is remarkably increased, the lifting forklift is suitable for more working environments, the forklift can be prevented from falling accidentally, and the problem of cargo collapse is completely eradicated.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting equipment, in particular to a portable electric lifting forklift. Background Art

[0002] As an industrial handling vehicle, a forklift is a wheeled handling vehicle that loads and unloads, stacks and transports palletized goods over short distances. Currently, forklifts on the market usually include a power unit, a chassis and a working device. The working device includes chains, gears, a gantry and a forklift frame. In order to increase the lifting height, some forklifts are designed with multi-stage working devices, which makes the forklift large in size and weight, and the material cost high, which is not conducive to the operator's flexible movement of the forklift. Since it involves the handling and lifting of heavy objects, the multi-stage lifting forklift has high requirements on the use environment and personnel. If some forklifts are not operated correctly, it may cause accidents such as cargo collapse, forklift overturning or collision, posing a safety threat to the operator himself and surrounding personnel. Summary of the invention

[0003] To this end, the technical problem to be solved by the present invention is to overcome the problems in the prior art that the multi-stage working device has large volume, weight, high material cost, and easy collapse of goods, and further provide a portable electric lifting forklift, which not only significantly improves the lifting height of the forklift, making the lifting forklift suitable for more working environments, but also prevents the forklift from accidentally falling and eliminates the problem of cargo collapse.

[0004] In order to solve the above technical problems, the present invention provides a portable electric lifting forklift, comprising:

[0005] First level framework;

[0006] A secondary frame, the primary frame being slidably connected to the secondary frame along a first direction;

[0007] A fixed frame, the secondary frame being slidably connected to the fixed frame along the first direction;

[0008] A limiting mechanism, comprising a hook assembly and a hanger, wherein the hook assembly is arranged at one end of the secondary frame along the first direction, and the hanger is arranged on the primary frame, wherein the hook assembly comprises a hook body and a torsion spring, the hook body is rotatably connected to the secondary frame and has a hook lock state and an avoidance state, the hook body in the hook lock state hooks the hanger, the torsion spring is used to reset the hook body clockwise from the avoidance state to the hook lock state, and the hanger is arranged to move along the first direction with the primary frame to push the hook body counterclockwise to rotate from the hook lock state to the avoidance state.

[0009] In one embodiment of the present invention, it also includes a transmission mechanism, which is used to drive the primary frame and the secondary frame to move along the first direction, and the transmission mechanism includes a wire roller, a motor for driving the wire roller to rotate, a wire rope, a fixing screw, a fixed pulley, a first movable pulley, a second movable pulley and a third movable pulley, wherein the motor and the wire roller are arranged on the fixed frame, the first movable pulley and the third movable pulley are respectively connected to the two ends of the secondary frame along the first direction, the fixing screw and the first movable pulley are located at the same end of the secondary frame, and the wire roller is located on one side of the fixed pulley along the first direction; the second movable pulley is connected to the primary frame, one end of the wire rope is fixedly connected to the wire roller, and the other end of the wire rope passes around the fixed pulley, the second movable pulley, the first movable pulley and the third movable pulley in sequence and is finally fixedly connected to the fixing screw.

[0010] In one embodiment of the present invention, it further includes a support plate connected to the primary frame, and the support plate is arranged at an end of the primary frame away from the hook assembly, and the plane where the support plate is located is perpendicular to the first direction.

[0011] In one embodiment of the present invention, the limiting mechanism further comprises a limiting rod, the hook body is provided with a protruding abutment portion, and the abutment portion of the hook body in the hook lock state abuts against the limiting rod in a clockwise direction.

[0012] It also includes a pushing block connected to the fixed frame, and the hook body is also rotatably connected to a roller. The pushing block is arranged opposite to the roller along the first direction, and the pushing block is arranged between the hook body and the third movable pulley. The pushing block pushes the roller along the first direction so that the hook body rotates counterclockwise from a locked state to an avoidance state.

[0013] In one embodiment of the present invention, it also includes a pallet fixing frame perpendicular to the fixed frame, the pallet fixing frame is rotatably connected to an end of the fixed frame away from the hook assembly, and the pallet fixing frame is configured to abut the pallet along the first direction.

[0014] In one embodiment of the present invention, the fixed frame and the secondary frame are both provided with handrails at one end away from the support plate fixing frame.

[0015] In one embodiment of the present invention, it also includes a limiting guide plate connected to the fixed frame, the limiting guide plate is provided with an arc-shaped guide portion, both ends of the arc-shaped guide portion are provided with limiting grooves, the support plate fixing frame is provided with a limiting pin and a strip hole, the fixed frame is provided with bolts corresponding to the strip holes, the bolts pass through the strip holes, the limiting pin and the bolt are connected by an elastic element; the limiting pin is clamped in the limiting groove to limit the support plate fixing frame.

[0016] In one embodiment of the present invention, a roller is further included, wherein the roller and the support plate fixing frame are both arranged at the same end of the fixing frame, and when the fixing frame is arranged vertically, the bottom of the roller is arranged flush with the support plate fixing frame.

[0017] In one embodiment of the present invention, primary guide grooves are provided on both sides of the fixed frame, and the primary guide grooves extend along the first direction. Both sides of the secondary frame are slidably connected to the primary guide grooves. Secondary guide grooves are provided on both sides of the secondary frame, and the secondary guide grooves extend along the first direction. Both ends of the primary frame are slidably connected to the secondary guide grooves.

[0018] In one embodiment of the present invention, the primary guide groove is located on the inner side of the fixed frame, and the secondary guide groove is located on the inner side of the secondary frame.

[0019] The above technical solution of the present invention has the following advantages compared with the prior art:

[0020] The portable electric lifting forklift described in the present invention significantly improves the lifting height of the lifting forklift by arranging a primary frame and a secondary frame, solves the problem of unloading and loading goods at high places, and makes the applicable environment of the lifting forklift wider; the hook assembly is arranged on the top of the secondary frame, and when the primary frame rises to the top of the secondary frame, it is hooked by the hook body, and the primary frame is fixed to the top of the secondary frame to prevent the primary frame from accidentally falling and causing the collapse of the goods; the hook body is rotatably connected to the secondary frame, and when the primary frame rises to the highest point of the secondary frame, the pendant automatically pushes open the hook body, and the hook body firmly hooks and locks the pendant after rebounding, with continuous action and simple operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0022] Figure 1 This is a schematic structural diagram of a portable electric lifting forklift according to the present invention;

[0023] Figure 2 for Figure 1A structural schematic diagram of a front view of a portable electric lifting forklift is shown;

[0024] Figure 3 for Figure 1 A schematic structural diagram of a side view of a portable electric lift forklift is shown;

[0025] Figure 4 for Figure 3 A schematic diagram of the structure of a portable electric lifting forklift when the secondary frame of the pallet is in the highest position and the pallet fixing frame is unfolded;

[0026] Figure 5 for Figure 3 A schematic diagram of the structure of a portable electric lifting forklift when the pallet fixing frame is stored;

[0027] Figure 6 for Figure 3 A partial enlarged view of point A shown;

[0028] Figure 7 for Figure 6 The structural schematic diagram of the limiting guide plate shown;

[0029] Figure 8 for Figure 1 A local enlarged view of point B shown;

[0030] Fig. 9 It is a schematic diagram of the structure of the motor and the wire roller of the transmission mechanism of the present invention;

[0031] Fig.10 for Fig. 9 A schematic diagram of the structure of the first movable pulley, the second movable pulley, the third movable pulley, the fixed pulley, the wire roller and the fixing screw of the transmission mechanism shown;

[0032] Description of the accompanying drawings: 1. primary frame; 2. secondary frame; 21. second handrail; 3. fixed frame; 31. first handrail; 33. roller; 34. push block; 35. primary guide groove; 36. secondary guide groove; 4. transmission mechanism; 41. motor; 42. wire roller; 43. fixing screw; 44. first movable pulley; 45. fixed pulley; 46. third movable pulley; 47. wire rope; 48. The second movable pulley; 5. the limiting guide plate; 51. the first limiting groove; 52. the arc-shaped guide portion; 53. the second limiting groove; 54. the through hole; 55. the bolt; 6. the hanging part; 7. the support plate; 8. the support plate fixing frame; 81. the limiting pin; 82. the elastic element; 83. the strip hole; 9. the hook body; 91. the abutting portion; 92. the force arm of the torsion spring; 93. the limiting rod; 94. the roller; X, the second direction; Y, the first direction. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0034] Example

[0035] Reference Figure 1 and 8 As shown, in one embodiment of the present invention, a portable electric lifting forklift is disclosed, comprising:

[0036] A primary frame 1, which is arranged in a rectangular structure;

[0037] The secondary frame 2 is configured as a rectangular structure and is longer than the primary frame 1. The primary frame 1 is slidably connected to the secondary frame 2 along a first direction Y, and the primary frame 1 can slide from one end of the secondary frame 2 to the other end;

[0038] A fixed frame 3, the secondary frame 2 is slidably connected to the fixed frame 3 along the first direction Y, and when the fixed frame 3 is placed vertically, the first direction Y is a vertical direction;

[0039] A limiting mechanism, which includes a hook assembly and a hanger 6, wherein the hook assembly is arranged at one end of the secondary frame 2 along the first direction Y, when the secondary frame 2 is placed vertically, the hook assembly is located at the top of the secondary frame 2, and the hanger 6 is arranged on the primary frame 1, wherein the hook assembly includes a hook body 9 and a torsion spring, the hook body 9 is rotatably connected to the secondary frame 2 and has a hook lock state and an avoidance state, the hook body 9 in the hook lock state can hook the hanger 6 to fix the primary frame 1 on the top of the secondary frame 2 to prevent the primary frame 1 from falling; the hook body 9 in the avoidance state makes the hook body 9 move to the locking range of the hook body 9, the force arm 92 of the torsion spring pushes the hook body 9 to reset clockwise from the avoidance state to the hook lock state through elastic potential energy, and the hanger 6 is arranged to move along the first direction Y with the primary frame 1 to push the hook body 9 to rotate counterclockwise from the hook lock state to the avoidance state.

[0040] Reference Figure 2 , 9As shown in 10, it also includes a transmission mechanism 4, which is used to drive the primary frame 1 and the secondary frame 2 to move along the first direction Y, and the transmission mechanism 4 includes a wire roller 42, a motor 41 for driving the wire roller 42 to rotate, a wire rope 47, a fixing screw 43, a fixed pulley 45, a first movable pulley 44, a second movable pulley 48 and a third movable pulley 46, wherein the motor 41 and the wire roller 42 are arranged on the fixed frame 3, when the secondary frame 2 is vertically arranged, the first movable pulley 44 and the third movable pulley 46 are respectively connected to the top and bottom ends of the secondary frame 2, and the fixing screw 43 is also located at the top of the secondary frame 2 , the wire roller 42 is arranged below the fixed pulley 45; the second movable pulley 48 is connected to the primary frame 1, one end of the wire rope 47 is fixedly connected to the wire roller 42, and the other end of the wire rope 47 passes through the top of the fixed pulley 45, the bottom of the second movable pulley 48, the top of the first movable pulley 44 and the bottom of the third movable pulley 46 in sequence, and is finally fixedly connected to the fixing screw 43. In this way, when the primary frame 1 and the secondary frame 2 are both at the lowest point, after the wire roller 42 rotates, the wire rope 47 first lifts the primary frame 1, and after the primary frame is fixed on the top of the secondary frame 2, the wire rope 47 continues to lift the secondary frame 2.

[0041] Reference Figure 3 As shown, it also includes a pallet 7 fixedly connected to the primary frame 1, and the plane where the pallet 7 is located is perpendicular to the first direction Y. In other embodiments, the pallet 7 can be rotatably connected to the primary frame 1 for easy folding to reduce the volume, and the pallet 7 is used to support heavy objects; and the pallet 7 is located at one end of the primary frame 1 away from the hook assembly, so that when the primary frame and the secondary frame 2 are at the lowest point, the pallet 7 is also at the lowest point, which is convenient for the operator to load and unload heavy objects.

[0042] Reference Figure 8 As shown, the limiting mechanism also includes a limiting rod 93, and the hook body 9 is convexly provided with an abutment portion 91. When the hook body 9 rotates to a certain angle, the abutment portion 91 can abut against the limiting rod 93 and stop rotating. The torsion spring passes through the hook body 9 and the force arm 92 of the torsion spring abuts against the limiting rod 93, so as to ensure that the hook body 9 rotates within a specific angle; wherein, the abutment portion 91 of the hook body 9 in the hook lock state abuts against the limiting rod 93 in the clockwise direction.

[0043] Reference Figure 1As shown, it also includes a pushing block 34 connected to the fixed frame 3, and the hook body 9 is also rotatably connected to a roller 94. The pushing block 34 is arranged opposite to the roller 94 along the first direction Y, and the pushing block 34 is arranged between the hook body 9 and the third movable pulley 46. When the fixed frame 3 is vertically arranged, the pushing block 34 is located directly below the hook body 9; when the secondary frame 2 descends, the pushing block 34 pushes the roller 94 along the first direction Y so that the hook body 9 rotates counterclockwise from a locked state to a avoidance state, and the hook body 9 releases the hook lock on the hanger 6, and the primary frame 1 and the secondary frame 2 are released.

[0044] Reference Figure 3 As shown, it also includes a pallet fixing frame 8 perpendicular to the fixed frame 3, the pallet fixing frame 8 is connected to one end of the fixed frame 3 away from the hook assembly, and when the fixed frame 3 is vertically set, the pallet fixing frame 8 is located at the bottom end of the fixed frame 3, and is used to vertically support the fixed frame 3 on the ground; the pallet fixing frame 8 can also be rotatably connected to the fixed frame 3, the purpose is to facilitate folding the pallet fixing frame 8 and reduce the volume of the forklift; and the pallet fixing frame 8 is configured to be able to abut against the pallet 7 along the first direction Y, for supporting the pallet 7.

[0045] Reference Figure 1 As shown, the fixed frame 3 and the secondary frame 2 are respectively provided with a first armrest 31 and a second armrest 21 at one end away from the pallet fixing frame 8. When the secondary frame 2 is at the lowest point, the first armrest 31 and the second armrest 21 can be used at the same time. After the secondary frame 2 is raised, the second armrest 21 is used preferentially.

[0046] Reference Figure 3 , 6As shown in 7, in order to limit the rotation angle of the support plate fixing frame 8, it also includes two limiting guide plates 5 respectively connected to the two sides of the fixing frame 3 along the second direction X, the limiting guide plates 5 are vertically arranged, each of the limiting guide plates 5 is provided with an arc-shaped guide portion 52 and a through hole 54, the two ends of the arc-shaped guide portion 52 are respectively provided with a first limiting groove 51 and a second limiting groove 53, the two sides of the support plate fixing frame 8 along the second direction X are provided with limiting pins 81 and strip holes 83, the two sides of the fixing frame 3 along the second direction X corresponding to the strip holes 83 are provided with bolts 55, the bolts 55 pass through the through holes 54 to fix the limiting guide plates 5 on the fixing frame 3; the bolts 55 pass through the strip holes 83 to limit the support plate fixing frame 8 in the second direction X, so that the support plate fixing frame 8 can be laterally displaced and rotated relative to the limiting guide plates 5; The limit pin 81 and the bolt 55 are connected by an elastic element 82, and the limit pin 81 is engaged with the limit groove. When the limit pin 81 displaces the second limit groove 53, the support plate fixing frame 8 is in an expanded state, and when the limit pin 81 is located in the first limit groove 51, the support plate fixing frame 8 is in a stored state; the elastic potential energy of the elastic element 82 is always used to tighten the support plate fixing frame 8 toward the center of the bolt 55, so that the limit pin 81 can always be in the first limit groove 51 or the second limit groove 53 to prevent the limit pin 81 from jumping out of the first limit groove 51 or the second limit groove 53, which is used to limit the angle of the support plate fixing frame 8. When the support plate fixing frame 8 is expanded, the support plate 7 can be pulled and fixed so that the limit pin 81 leaves the first limit groove 51, and then the support plate fixing frame 8 is rotated so that the limit pin 81 slides along the arc-shaped guide portion 52 and finally jumps into the second limit groove 53.

[0047] Reference Figure 1 As shown, in order to facilitate the operator to push the forklift, it also includes a roller 33, and the roller 33 and the pallet fixing frame 8 are both arranged at the same end of the fixed frame 3, and the roller 33 and the pallet fixing frame 8 are respectively located on both sides of the fixed frame 3. When the fixed frame 3 is set vertically, the bottom of the roller 33 is flush with the pallet fixing frame 8, so as to ensure that the pallet fixing frame 8 is placed horizontally on the ground and is not tilted due to the roller 33.

[0048] Reference Figure 1 As shown, primary guide grooves 35 are provided on both sides of the fixed frame 3, and the primary guide grooves 35 extend along the first direction Y. Both sides of the secondary frame 2 are slidably connected to the primary guide grooves 35. Secondary guide grooves 36 are provided on both sides of the secondary frame 2, and the secondary guide grooves 36 extend along the first direction Y. Both ends of the primary frame 1 are slidably connected to the secondary guide grooves 36. Both ends of the primary guide grooves 35 and the secondary guide grooves 36 are provided with limiting structures to prevent the fixed frame 3, the primary frame 1 and the secondary frame 2 from detaching from each other.

[0049] Reference Figure 1 As shown, the primary guide groove 35 is located on the inner side of the fixed frame 3 , and the secondary guide groove 36 is located on the inner side of the secondary frame 2 .

[0050] The working principle of the portable electric lifting forklift of the present invention is:

[0051] Before use, unfold and fix the pallet fixing frame 8, use the pallet fixing frame 8 to vertically set the fixing frame 3 at the heavy object loading and unloading point, after the operator puts the heavy object on the pallet 7, the primary frame 1 rises with the pallet 7 under the drive of the transmission mechanism 4, and when the primary frame 1 is about to move to the top of the secondary frame 2, the hanger 6 pushes the hook body 9 to make it rotate counterclockwise from the locked state to the avoidance state to avoid the hanger 6, and after the hanger 6 enters the locking range of the hook body 9, the torsion spring drives the hook body 9 to rotate clockwise from the avoidance state until it is locked to lock the hanger 6, at this time, the abutment part 91 just abuts against the limit rod 93 to stop rotating, and the primary frame 1 is fixed on the top of the secondary frame 2. Then, driven by the transmission mechanism 4, the secondary frame 2 rises to the highest point to complete the loading and unloading of heavy objects; when descending, the secondary frame 2 descends first, and when the secondary frame 2 descends to the lowest point, the pushing block 34 just pushes the roller 94 to make the hook body 9 rotate counterclockwise from the locked state to the avoidance state, releasing the hook lock on the hanger 6, so that the primary frame 1 can be lowered to the lowest point relative to the secondary frame 2; when use is over, the pallet fixing frame 8 is stored, and then the fixed frame 3 is laid flat.

[0052] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A portable electric lift forklift, It is characterized in that include, First level framework; A secondary frame, the primary frame being slidably connected to the secondary frame along a first direction; A fixed frame, the secondary frame being slidably connected to the fixed frame along the first direction; A limiting mechanism, comprising a hook assembly and a hanger, wherein the hook assembly is arranged at one end of the secondary frame along the first direction, and the hanger is arranged on the primary frame, wherein the hook assembly comprises a hook body and a torsion spring, the hook body is rotatably connected to the secondary frame and has a hook lock state and an avoidance state, the hook body in the hook lock state hooks the hanger, the torsion spring is used to reset the hook body clockwise from the avoidance state to the hook lock state, and the hanger is arranged to move along the first direction with the primary frame to push the hook body counterclockwise to rotate from the hook lock state to the avoidance state.

2. A portable electric lift forklift according to claim 1, It is characterized in that It also includes a transmission mechanism, which is used to drive the primary frame and the secondary frame to move along the first direction, and the transmission mechanism includes a wire roller, a motor that drives the wire roller to rotate, a wire rope, a fixing screw, a fixed pulley, a first movable pulley, a second movable pulley and a third movable pulley, wherein the motor and the wire roller are arranged on the fixed frame, the first movable pulley and the third movable pulley are respectively connected to the two ends of the secondary frame along the first direction, the fixing screw and the first movable pulley are located at the same end of the secondary frame, and the wire roller is located on one side of the fixed pulley along the first direction; the second movable pulley is connected to the primary frame, one end of the wire rope is fixedly connected to the wire roller, and the other end of the wire rope passes around the fixed pulley, the second movable pulley, the first movable pulley and the third movable pulley in sequence and is finally fixedly connected to the fixing screw.

3. A portable electric lift forklift according to claim 1, It is characterized in that It also includes a support plate connected to the primary frame, and the support plate is arranged at one end of the primary frame away from the hook assembly, and the plane where the support plate is located is perpendicular to the first direction.

4. A portable electric lift forklift according to claim 2, It is characterized in that The limiting mechanism further comprises a limiting rod, the hook body is convexly provided with an abutment portion, and the abutment portion of the hook body in the hook lock state abuts against the limiting rod in a clockwise direction.

5. A portable electric lift forklift according to claim 4, It is characterized in that It also includes a pushing block connected to the fixed frame, and the hook body is also rotatably connected to a roller. The pushing block is arranged opposite to the roller along the first direction, and the pushing block is arranged between the hook body and the third movable pulley. The pushing block pushes the roller along the first direction so that the hook body rotates counterclockwise from a locked state to an avoidance state.

6. A portable electric lift forklift according to claim 1, It is characterized in that It also includes a pallet fixing frame perpendicular to the fixed frame, the pallet fixing frame is rotatably connected to an end of the fixed frame away from the hook assembly, and the pallet fixing frame is configured to abut against the pallet along the first direction.

7. A portable electric lift forklift according to claim 6, It is characterized in that It also includes a limiting guide plate connected to the fixed frame, the limiting guide plate is provided with an arc-shaped guide portion, both ends of the arc-shaped guide portion are provided with limiting grooves, the support plate fixing frame is provided with a limiting pin and a strip hole, the fixed frame is provided with bolts corresponding to the strip holes, the bolts pass through the strip holes, the limiting pin and the bolt are connected by an elastic element; the limiting pin is clamped in the limiting groove to limit the support plate fixing frame.

8. A portable electric lift forklift according to claim 6, It is characterized in that It also includes a roller, and the roller and the support plate fixing frame are both arranged at the same end of the fixing frame. When the fixing frame is arranged vertically, the bottom of the roller is arranged flush with the support plate fixing frame.

9. The portable electric lift forklift according to claim 1, It is characterized in that The fixed frame is provided with primary guide grooves on both sides, and the primary guide grooves extend along the first direction. The two sides of the secondary frame are slidably connected to the primary guide grooves. The secondary frame is provided with secondary guide grooves on both sides, and the secondary guide grooves extend along the first direction. Both ends of the primary frame are slidably connected to the secondary guide grooves.

10. A portable electric lift forklift according to claim 9, It is characterized in that The primary guide groove is located on the inner side of the fixed frame, and the secondary guide groove is located on the inner side of the secondary frame.

Images