Forklift lifting mechanism with function of supporting center-of-gravity shift

Abstract

The invention relates to the technical field of forklifts, in particular to a forklift lifting mechanism with a gravity center shift supporting function, and solves the problems that in the prior art, cargoes borne by a forklift lifting mechanism are too heavy, when the forklift moves or lifts the cargoes, the forklift tilts forwards, and due to the fact that the gravity center of the cargoes is close to the front and is located at the front end of a fork arm part of the forklift, the forklift cannot move forwards. And when the weight of the goods is greater than the weight of the counter weight and the rear end of the forklift, the goods incline forwards. A forklift lifting mechanism with a function of supporting center-of-gravity shift comprises a forklift body, one side of the forklift body is fixedly connected with a bottom frame, the inner side of the bottom frame is rotatably connected with a bearing shaft, and the bearing shaft is fixedly connected with a lifting mechanism. The gravity center of goods is close to the center position of the front wheel of the forklift body, meanwhile, the bearing gravity center of the first hydraulic oil cylinder for supporting the lifting mechanism is located in the center position of the forklift body, the first hydraulic oil cylinder is matched with the balancing weight to form the triangular stable stress supporting effect on the front portion, the rear portion and the top, and the stability of materials is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of forklifts, and in particular to a forklift lifting mechanism with a function of supporting gravity center deviation. Background Art

[0002] A forklift is an industrial handling vehicle, which refers to various wheeled handling vehicles for loading and unloading, stacking and short-distance transportation of palletized goods. It is often used for the transportation of large objects in storage, usually powered by a fuel engine or battery. The technical parameters of a forklift are used to indicate the structural characteristics and working performance of the forklift. The main technical parameters are: rated lifting capacity, load center distance, maximum lifting height, mast inclination, maximum travel speed, minimum turning radius, minimum ground clearance, wheelbase, track, etc. Forklifts are widely used in ports, stations, airports, cargo yards, factory workshops, warehouses, circulation centers and distribution centers, etc., for loading and unloading and handling of palletized goods in cabins, carriages and containers. They are indispensable equipment for pallet transportation and container transportation.

[0003] When using a forklift, it is necessary to ensure the stability of the forklift and prevent the forklift lifting mechanism from tilting forward. However, if the cargo carried by the forklift lifting mechanism is too heavy, the forklift will tilt forward when moving or lifting the cargo, which may lead to a safety accident. Since the center of gravity of the cargo is forward, located at the front end of the forklift fork arm, its center of gravity will not be located at the rear part of the forklift. At this time, when the weight of the cargo is greater than the forklift counterweight and the rear end weight, the forklift will tilt forward, which is extremely inconvenient. Therefore, a forklift lifting mechanism with a function of supporting the center of gravity offset is urgently needed to solve the above problem. Summary of the invention

[0004] The purpose of the present invention is to provide a forklift lifting mechanism with a function of supporting center of gravity offset, which solves the problem in the prior art that when the cargo carried by the forklift lifting mechanism is too heavy, the forklift will tilt forward when moving or lifting the cargo, thereby causing a safety accident. Since the center of gravity of the cargo is forward, located at the front end of the fork arm of the forklift, its center of gravity will not be located at the rear part of the forklift. At this time, when the weight of the cargo is greater than the counterweight and the rear end weight of the forklift, the forklift will tilt forward.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A forklift lifting mechanism with a function of supporting center of gravity offset comprises a forklift body, one side of the forklift body is fixedly connected to a bottom frame, and the inner side of the bottom frame is rotatably connected to a load-bearing shaft, a lifting mechanism is fixedly connected to the load-bearing shaft, one side of the lifting mechanism is fixedly connected to a fixing plate, and one side of the forklift body is provided with a load-bearing groove, and one side of the inner wall of the load-bearing groove is fixedly connected to a second hydraulic cylinder by bolts, one side of the fixing plate is slidably connected to a second slider, and the output shaft of the second hydraulic cylinder is rotatably connected to one side of the second slider by a pin shaft, the upper part of the fixing plate is slidably connected to the first slider, the top side of the forklift body is fixedly connected to a ceiling, and the top A first hydraulic cylinder is fixedly connected to one side of the top of the shed by bolts, and one end of the output shaft of the first hydraulic cylinder is rotatably connected to one side of the first slider by a pin shaft, one side of the lifting mechanism is slidably connected to a sliding mechanism, one side of the sliding mechanism is fixedly connected to a side frame, and the inner side of the side frame is rotatably connected to a supporting plate by a pin shaft, fork arms are installed on both sides of the supporting plate, one side of the supporting plate is slidably connected to a third slider, and one side of the side frame is fixedly connected to a third hydraulic cylinder by bolts, and the output shaft of the third hydraulic cylinder passes through the side wall of the side frame, wherein an extending end of the output shaft of the third hydraulic cylinder is rotatably connected to one side of the third slider by a pin shaft.

[0007] Preferably, a slide groove is provided on one side of the fixed plate, and the first slider and the second slider are both slidably connected to the one side of the fixed plate through the slide groove, and the first slider, the second slider and the slide groove are all T-shaped.

[0008] Preferably, a sliding groove is provided on one side of the carrying plate, and the third sliding block is slidably connected to the one side of the carrying plate through the sliding groove, and the third sliding block and the sliding groove are both T-shaped.

[0009] Preferably, a reinforcing rod is fixedly connected to the lower portion of the ceiling, and the reinforcing rod and the side portion of the ceiling are distributed in a triangle.

[0010] Preferably, a top plate is fixedly connected to one side of the top of the ceiling, and the output shaft of the first hydraulic cylinder passes through the top plate.

[0011] Preferably, both ends of the load-bearing shaft are rotatably connected to the inner wall of the bottom frame through a rotating shaft, and a counterweight is fixedly connected to the top of the rear end of the forklift body.

[0012] The present invention has at least the following beneficial effects:

[0013] The present invention discloses a forklift lifting mechanism with a function of supporting the center of gravity offset. When the forklift body is in use, the original lifting mechanism is first used to move the side frame downward, so that two fork arms are lowered, and the fork arms are used to fork the pallet and the material. When the material continues to rise, the first hydraulic cylinder and the second hydraulic cylinder are started, and the lifting mechanism is pulled backward by the second hydraulic cylinder, so that the entire lifting mechanism is inclined, and the inclination angle is 10-20 degrees. Then, the first hydraulic cylinder and the second hydraulic cylinder are used to operate synchronously to stabilize the upper part of the lifting mechanism, so that the center of gravity of the entire cargo is finally moved backward. At this time, the center of gravity of the cargo will be close to the center position of the front wheel of the forklift body, and the first hydraulic cylinder will be used to stabilize the upper part of the lifting mechanism. The load-bearing center of gravity supported by the lifting mechanism will be located at the center of the forklift body, and cooperate with its own counterweight to form a triangular stable force support at the front, rear and top, which greatly improves the stability of the material, avoids the problem of the fork arm tilting forward when carrying heavy materials, improves the overall safety, and has high practicality. It avoids the problem of excessive weight of the goods carried by the forklift lifting mechanism in the prior art. When the forklift moves or lifts the goods, it will cause the forklift to tilt forward, thereby causing safety accidents. Since the center of gravity of the goods is forward, located at the front end of the forklift fork arm, its center of gravity will not be located at the rear part of the forklift. At this time, when the weight of the goods is greater than the forklift counterweight and the rear end weight, a series of problems such as tilting forward will occur.

[0014] The present invention also has the following beneficial effects:

[0015] 1. The first slider, the second slider and the slide groove are all in T-shape to improve stability and prevent the first slider and the second slider from sliding out. At the same time, the lifting mechanism can be tilted and adjusted by connecting with a pin shaft. After the first hydraulic cylinder and the second hydraulic cylinder stop running, the output shafts of the first hydraulic cylinder and the second hydraulic cylinder will not extend or retract, so as to support the lifting mechanism and maintain its stability.

[0016] 2. When the lifting mechanism tilts, the pallet and materials lifted by the fork arm will also tilt to a certain extent. At this time, the fork arm needs to be kept horizontal to ensure the overall stability of the material and facilitate the subsequent loading and unloading of the material. That is, the third hydraulic cylinder is started to extend the output shaft, so that the load-bearing plate, the two forks and the material can return to a horizontal state, and the extension and contraction amount of the third hydraulic cylinder changes accordingly with the extension and contraction amount of the first hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the overall main structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall top view structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the overall bottom-up structure of the present invention;

[0021] Figure 4 It is a partial structural schematic diagram of the lifting mechanism of the present invention;

[0022] Figure 5 It is a schematic diagram of the side frame and its structure of the present invention;

[0023] Figure 6 It is a schematic diagram of the rear end structure of the forklift body of the present invention;

[0024] Figure 7 It is a schematic diagram of the main structure of the lifting mechanism of the present invention.

[0025] In the figure: 1. forklift body; 2. ceiling; 3. load-bearing groove; 4. lifting mechanism; 5. fixed plate; 6. side frame; 7. load-bearing plate; 8. sliding mechanism; 9. fork arm; 10. top plate; 11. first hydraulic cylinder; 12. first slide block; 13. slide groove; 14. second hydraulic cylinder; 15. second slide block; 16. bottom frame; 17. load-bearing shaft; 18. counterweight block; 19. reinforcement rod; 20. third hydraulic cylinder; 21. third slide block; 22. sliding groove. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] Embodiment 1

[0028] Reference Figure 1-7, comprising a forklift body 1, one side of the forklift body 1 is fixedly connected to a bottom frame 16, and the inner side of the bottom frame 16 is rotatably connected to a load-bearing shaft 17, a lifting mechanism 4 is fixedly connected to the load-bearing shaft 17, one side of the lifting mechanism 4 is fixedly connected to a fixing plate 5, and one side of the forklift body 1 is provided with a load-bearing groove 3, and one side of the inner wall of the load-bearing groove 3 is fixedly connected to a second hydraulic cylinder 14 by bolts, one side of the fixing plate 5 is slidably connected to a second slider 15, and the output shaft of the second hydraulic cylinder 14 is rotatably connected to one side of the second slider 15 by a pin shaft, the upper part of the fixing plate 5 is slidably connected to a first slider 12, the top side of the forklift body 1 is fixedly connected to a ceiling 2, and the top side of the ceiling 2 is fixedly connected to a second slider 15 by a pin shaft. A first hydraulic cylinder 11 is fixedly connected with bolts, and one end of the output shaft of the first hydraulic cylinder 11 is rotatably connected to one side of the first slider 12 through a pin shaft, one side of the lifting mechanism 4 is slidably connected with a sliding mechanism 8, one side of the sliding mechanism 8 is fixedly connected with a side frame 6, and the inner side of the side frame 6 is rotatably connected with a bearing plate 7 through a pin shaft, fork arms 9 are installed on both sides of the bearing plate 7, one side of the bearing plate 7 is slidably connected with a third slider 21, and one side of the side frame 6 is fixedly connected with a third hydraulic cylinder 20 through bolts, and the output shaft of the third hydraulic cylinder 20 passes through the side wall of the side frame 6, wherein the extended end of the output shaft of the third hydraulic cylinder 20 is rotatably connected to one side of the third slider 21 through a pin shaft.

[0029] First, use the original lifting mechanism 4 to move the side frame 6 downward, so that the two fork arms 9 are lowered, and the fork arms 9 are used to fork the pallet and the material. When the material continues to rise, start the first hydraulic cylinder 11 and the second hydraulic cylinder 14, and use the second hydraulic cylinder 14 to pull the lifting mechanism 4 backward, so that the entire lifting mechanism 4 is inclined, and the inclination angle is 10-20 degrees. Then use the first hydraulic cylinder 11 and the second hydraulic cylinder 14 to operate synchronously to stabilize the upper part of the lifting mechanism 4, so that the center of gravity of the entire cargo is finally moved backward. At this time, the center of gravity of the cargo will be close to the center position of the front wheel of the forklift body 1, and at the same time, the first hydraulic cylinder 11 supports the load-bearing capacity of the lifting mechanism 4 The center of gravity will be located at the center of the forklift body 1, and cooperate with its own counterweight block 18 to form a triangular stable force support at the front, back and top, which greatly improves the stability of the material, avoids the problem of the fork arm 9 tilting forward when carrying heavy materials, improves the overall safety, and has high practicality. It avoids the problem of the forklift lifting mechanism 4 in the prior art that the goods are too heavy, and the forklift will tilt forward when moving or lifting the goods, thereby causing a safety accident. Since the center of gravity of the goods is forward, located at the front end of the fork arm 9 of the forklift, its center of gravity will not be located at the rear part of the forklift. At this time, when the weight of the goods is greater than the forklift counterweight and the rear end weight, a series of problems such as tilting forward will occur.

[0030] Embodiment 2

[0031] Reference Figure 1-7 A slide groove 13 is provided on one side of the fixed plate 5, and the first slider 12 and the second slider 15 are slidably connected to one side of the fixed plate 5 through the slide groove 13, and the first slider 12 and the second slider 15 are T-shaped with the slide groove 13.

[0032] The first slider 12, the second slider 15 and the slide groove 13 are all arranged in a T-shape to improve stability and prevent the first slider 12 and the second slider 15 from sliding out. At the same time, the lifting mechanism 4 can be tilted and adjusted by using a pin connection. After the first hydraulic cylinder 11 and the second hydraulic cylinder 14 stop running, the output shafts of the first hydraulic cylinder 11 and the second hydraulic cylinder 14 themselves will not extend or retract, so as to support the lifting mechanism 4 and maintain its stability.

[0033] Embodiment 3

[0034] Reference Figure 1-7 A sliding groove 22 is provided on one side of the carrying plate 7, and the third slider 21 is slidably connected to one side of the carrying plate 7 through the sliding groove 22, and the third slider 21 and the sliding groove 22 are both T-shaped.

[0035] The third slider 21 and the sliding groove 22 are in a T-shaped structure, so that the third slider 21 can be prevented from sliding out, and at the same time, when the third hydraulic cylinder 20 is not in operation, the stability of the fork arm 9 during use can be maintained.

[0036] Embodiment 4

[0037] Reference Figure 1-7 A reinforcing rod 19 is fixedly connected to the lower part of the ceiling 2, and the reinforcing rod 19 and the side of the ceiling 2 are distributed in a triangle.

[0038] The reinforcement rods 19 can further improve the stability of the roof 2 .

[0039] Embodiment 5

[0040] Reference Figure 1-7 A top plate 10 is fixedly connected to one side of the top of the ceiling 2 , and an output shaft of the first hydraulic cylinder 11 passes through the top plate 10 .

[0041] Embodiment 6

[0042] Reference Figure 1-7 Both ends of the load-bearing shaft 17 are rotatably connected to the inner wall of the bottom frame 16 through a rotating shaft, and a counterweight block 18 is fixedly connected to the top of the rear end of the forklift body 1.

[0043] In summary: the original lifting mechanism 4 is used to move the side frame 6 downward, so that the two fork arms 9 are lowered, and the fork arms 9 are used to fork the pallet and the material. When the material continues to rise, the first hydraulic cylinder 11 and the second hydraulic cylinder 14 are started, and the lifting mechanism 4 is pulled backward by the second hydraulic cylinder 14, so that the entire lifting mechanism 4 is inclined, and the inclination angle is 10-20 degrees, and then the first hydraulic cylinder 11 and the second hydraulic cylinder 14 are used to operate synchronously to stabilize the upper part of the lifting mechanism 4, so that the center of gravity of the entire cargo is finally moved backward. At this time, the center of gravity of the cargo will be close to the center position of the front wheel of the forklift body 1, and the load-bearing center of gravity of the lifting mechanism 4 supported by the first hydraulic cylinder 11 will be located at the center position of the forklift body 1, and cooperate with its own counterweight block 18 to form a triangular stable force support effect at the front, back and top, which greatly improves the stability of the material. The first slider 12 and the second slider 15 and the slide 13 are all T-shaped. The stability is improved, and the first slider 12 and the second slider 15 are prevented from sliding out. At the same time, the pin shaft connection is used to realize the tilt adjustment of the lifting mechanism 4. After the first hydraulic cylinder 11 and the second hydraulic cylinder 14 stop running, the output shafts of the first hydraulic cylinder 11 and the second hydraulic cylinder 14 will not extend or retract, so as to support the lifting mechanism 4 and maintain its stability. The third slider 21 and the sliding groove 22 are formed into a T-shaped structure, so that the third slider 21 can be prevented from sliding out. At the same time, when the third hydraulic cylinder 20 is not running, the stability of the fork arm 9 when in use can be maintained, thereby avoiding the excessive weight of the cargo carried by the forklift lifting mechanism 4 in the prior art. When the forklift moves or lifts the cargo, it will cause the forklift to tilt forward, thereby causing a safety accident. Since the center of gravity of the cargo is forward, located at the front end of the fork arm 9 of the forklift, its center of gravity will not be located at the rear part of the forklift. At this time, when the weight of the cargo is greater than the counterweight and the rear end weight of the forklift, a series of problems of tilting forward will occur.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A forklift lifting mechanism with a function of supporting center of gravity offset, comprising a forklift body (1), characterized in that: A bottom frame (16) is fixedly connected to one side of the forklift body (1), and a load-bearing shaft (17) is rotatably connected to the inner side of the bottom frame (16), a lifting mechanism (4) is fixedly connected to the load-bearing shaft (17), a fixing plate (5) is fixedly connected to one side of the lifting mechanism (4), a load-bearing groove (3) is provided on one side of the forklift body (1), and a second hydraulic cylinder (14) is fixedly connected to one side of the inner wall of the load-bearing groove (3) by bolts, a second slider (15) is slidably connected to one side of the fixing plate (5), and an output shaft of the second hydraulic cylinder (14) is rotatably connected to one side of the second slider (15) by a pin shaft, a first slider (12) is slidably connected to the upper part of the fixing plate (5), a ceiling (2) is fixedly connected to one side of the top of the forklift body (1), and a top side of the ceiling (2) is fixedly connected to one side of the top by a pin shaft. A first hydraulic cylinder (11) is fixedly connected by bolts, and one end of the output shaft of the first hydraulic cylinder (11) is rotatably connected to one side of the first slider (12) via a pin shaft. One side of the lifting mechanism (4) is slidably connected to a sliding mechanism (8), one side of the sliding mechanism (8) is fixedly connected to a side frame (6), and the inner side of the side frame (6) is rotatably connected to a bearing plate (7) via a pin shaft. Fork arms (9) are installed on both sides of the bearing plate (7). One side of the bearing plate (7) is slidably connected to a third slider (21), and one side of the side frame (6) is fixedly connected to a third hydraulic cylinder (20) via bolts, and the output shaft of the third hydraulic cylinder (20) passes through the side wall of the side frame (6), wherein the extended end of the output shaft of the third hydraulic cylinder (20) is rotatably connected to one side of the third slider (21) via a pin shaft.

2. A forklift lifting mechanism with the function of supporting center of gravity offset according to claim 1, characterized in that: A sliding groove (13) is provided on one side of the fixed plate (5), and the first slider (12) and the second slider (15) are both slidably connected to one side of the fixed plate (5) through the sliding groove (13), and the first slider (12) and the second slider (15) are all T-shapedly arranged with the sliding groove (13).

3. The forklift lifting mechanism with the function of supporting center of gravity shift according to claim 1, characterized in that: A sliding groove (22) is provided on one side of the carrying plate (7), and the third sliding block (21) is slidably connected to the one side of the carrying plate (7) through the sliding groove (22), and the third sliding block (21) and the sliding groove (22) are both T-shaped.

4. The forklift lifting mechanism with the function of supporting center of gravity shift according to claim 1, characterized in that: A reinforcing rod (19) is fixedly connected to the lower portion of the ceiling (2), and the reinforcing rod (19) and the side portion of the ceiling (2) are distributed in a triangle.

5. The forklift lifting mechanism with the function of supporting center of gravity shift according to claim 1, characterized in that: A top plate (10) is fixedly connected to one side of the top of the ceiling (2), and an output shaft of the first hydraulic cylinder (11) passes through the top plate (10).

6. The forklift lifting mechanism with the function of supporting center of gravity shift according to claim 1, characterized in that: Both ends of the bearing shaft (17) are rotatably connected to the inner wall of the bottom frame (16) via a rotating shaft, and a counterweight (18) is fixedly connected to the top of the rear end of the forklift body (1).

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