Telescopic double-deep-position three-way fork head and forklift

Abstract

The telescopic double-deep-position three-way fork head comprises a side moving sliding frame, a bridge frame, a swing cylinder, an auxiliary portal frame, a pallet fork frame and a telescopic fork, and the telescopic fork comprises an outer fork. A switching valve is fixedly connected to the side face, close to the swing cylinder, of the bridge and connected with an oil inlet and return pipeline, a rotating oil pipeline and a switching oil pipeline, and the other end of the rotating oil pipeline is connected with the swing cylinder. One end of the switching oil pipeline is connected with a switching valve, the other end of the switching oil pipeline is connected with a rotary connector, a telescopic oil pipeline is connected between the rotary connector and the telescopic fork, and a communication oil pipe is connected between two side forks of the telescopic fork. The fork head is arranged on the side-moving sliding frame and is matched with the bridge frame to controllably slide on the side-moving sliding frame, so that a forklift provided with the fork head can work on a double-deep-position goods shelf, the working efficiency is higher, the requirement for the width of a roadway is not high, meanwhile, the fork head has a better observation view field, and the working efficiency of operators is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of logistics equipment, in particular to a telescopic double-depth three-way fork head and a forklift. Background Art

[0002] With the rapid development of e-commerce, the logistics business volume has increased significantly, as well as the land and labor costs have risen rapidly. The industry has been looking for one or more multifunctional logistics equipment that can save warehouse space and improve logistics efficiency, while meeting the high-lift, large-tonnage and bulk cargo loading, unloading, handling, picking and other operational needs. Among them, the manned three-way stacker is a typical example.

[0003] Telescopic fork is a device that can be retracted and extended, which can make the forklift have greater accessibility during storage and transportation. At present, telescopic fork is generally used on reach forklift. Reach forklift equipped with telescopic fork can perform stacking operations on double-deep racks. Among them, double-deep racks are a intensive racking storage system. The racks are designed as a double-row parallel structure. The goods are placed in double positions along the depth direction of the racks. It has the characteristics of high space utilization and large cargo storage capacity.

[0004] However, reach trucks with telescopic forks require a larger aisle width, and because they operate on double-deep racks, the field of view at the second deepest position is often poor, which increases the difficulty of operation and reduces the forklift's working efficiency. Utility Model Content

[0005] The utility model aims to provide a telescopic double-deep three-way fork head and a forklift to solve the problems raised in the above-mentioned background technology.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A telescopic double-deep three-way fork head and forklift, comprising a side shift slide, the side shift slide is slidably connected to a bridge frame, the side end of the bridge frame is fixedly connected to a swing cylinder, the top end of the swing cylinder is fixedly connected to a sub-gantry, the side wall of the sub-gantry is slidably connected to a fork frame, a telescopic fork is arranged on the front of the fork frame, and the telescopic fork includes an extendable outer fork driven by hydraulic oil;

[0008] A switching valve is fixedly connected to the side of the bridge frame close to the swing cylinder, and the switching valve is connected to an oil inlet and return pipeline, a rotating oil pipeline and a conversion oil pipeline. Two oil inlet and return pipelines, two rotating oil pipelines and two conversion oil pipelines are provided, and the other end of the rotating oil pipeline is connected to the swing cylinder;

[0009] The other end of the conversion oil pipeline is connected to a rotary joint, and the rotary joint is fixedly connected to the auxiliary mast;

[0010] A telescopic oil pipeline is connected between the rotary joint and the telescopic fork, and a communicating oil pipe is connected between the two forks on both sides of the telescopic fork;

[0011] The telescopic oil pipeline includes a first inlet and outlet oil pipe and a second inlet and outlet oil pipe.

[0012] Preferably, a lifting mechanism is fixedly connected to the top surface of the swing cylinder. A sprocket frame is provided at the top telescopic end of the lifting mechanism. A sprocket is rotatably connected to the inner side of the sprocket frame. The sprocket is connected to a chain. One end of the chain is fixedly connected to the fork carriage, and the other end of the chain is fixedly connected to a weighing sensor, and the weighing sensor is fixedly connected to the auxiliary mast.

[0013] Preferably, the lifting mechanism can be set as an oil cylinder or a cylinder or a telescopic rod.

[0014] Preferably, two side wheels are provided on the side wall of the sprocket frame. An inner shaft is fixedly connected to the inner side wall of the sprocket frame. The inner shaft extends out of the side wall of the sprocket frame. The sprocket rotates on the inner shaft, and the side wheel rotates on the part of the inner shaft extending out of the sprocket frame.

[0015] Preferably, the first inlet and outlet oil pipe bypasses one of the two side wheels, and the second inlet and outlet oil pipe bypasses the other of the two side wheels.

[0016] Preferably, a side shift motor is provided on the top of the bridge frame. A vertical shaft is fixedly connected to the output end of the side shift motor located inside the bridge frame. A rack block is provided on the side of the side shift carriage. A gear is sleeved on the vertical shaft near the rack block, and the rack block and the gear are meshed.

[0017] Preferably, a fixing block is provided at the top end of the fork carriage directly below the side wheel for fixing the first inlet and outlet oil pipe and the second inlet and outlet oil pipe bypassing the side wheel.

[0018] A forklift truck including a telescopic double-depth three-way fork head includes a forklift truck body. A telescopic double-depth three-way fork head is provided at the front end of the forklift truck body. The side wall of the side shift carriage away from the bridge frame is fixedly connected to the front end of the forklift truck body.

[0019] The beneficial effects of the present invention:

[0020] 1. Through the settings and coordinated cooperation of the swing cylinder, switching valve, telescopic oil pipeline, etc., the convenient switching of the hydraulic oil flow direction by the switching valve is utilized, successfully achieving the controllable rotation of the swing cylinder and the convenient telescoping of the outer fork. In cooperation with the controllable sliding of the bridge on the side shift carriage, the forklift equipped with this fork head can operate on double-deep shelves, with higher operation efficiency, and has low requirements for the roadway width. It does not require the forklift to reverse or turn during operation. At the same time, since the telescoping direction of the outer fork can be different from the forward direction of the forklift, the operator can directly observe the operation situation of the outer fork, with a better observation field of view, improving the work efficiency of the operator.

[0021] 2. Through the settings and coordinated cooperation of the sprocket rack, chain, weighing sensor, etc., the upward movement of the lifting mechanism is utilized, enabling the chain to pull up the fork carriage, successfully achieving the upward movement of the fork carriage. And the weighing sensor can measure the weight of the goods carried by the telescopic fork and the outer fork through the chain, avoiding damage to the telescopic fork and the outer fork caused by overloaded goods and damage to the goods due to falling, greatly improving the safety during the operation of this device. The structural setting is delicate and efficient, suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following further describes the present utility model with reference to the drawings.

[0023] Figure 1 is the structural schematic diagram of the whole of the present utility model;

[0024] Figure 2 is the structural schematic diagram when the telescopic fork of the present utility model is in the extended state;

[0025] Figure 3 is the rear view of the present utility model;

[0026] Figure 4 is Figure 3 the enlarged schematic diagram of part A in

[0027] Figure 5 is the front view of the present utility model;

[0028] Figure 6 is the connection schematic diagram of the present utility model and the forklift body.

[0029] In the figure: 1. Telescopic fork; 101. Outer fork; 2. Fork carriage; 3. Sub-gantry; 4. Bridge frame; 5. Side-shift carriage; 6. Swing cylinder; 7. Switching valve; 8. Side-shift motor; 9. Rotary joint; 10. Weighing sensor; 11. Lifting mechanism; 12. Sprocket carrier; 1201. Sprocket; 1202. Side wheel; 13. Chain; 14. Inlet and return oil pipeline; 15. Rotating oil pipeline; 16. Conversion oil pipeline; 17. Telescopic oil pipeline; 1701. First inlet and outlet oil pipe; 1702. Second inlet and outlet oil pipe; 18. Connecting oil pipe; 19. Forklift body. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0031] Referring to Figures 1-6 As shown, the present invention is a telescopic double-depth three-way fork head and forklift, including a side-shift carriage 5. The side-shift carriage 5 is slidably connected to a bridge frame 4. A swing cylinder 6 is fixedly connected to the side end of the bridge frame 4. Among them, it should be noted that the swing cylinder 6 can realize the controllable rotation of its rotating shaft through hydraulic oil. This is the prior art and will not be elaborated here. The top end of the swing cylinder 6 is fixedly connected to a sub-gantry 3. Among them, it should be added that the sub-gantry 3 is fixedly connected to the rotating shaft of the swing cylinder 6. A fork carriage 2 is slidably connected to the side wall of the sub-gantry 3. A telescopic fork 1 is arranged on the front surface of the fork carriage 2. Among them, it should be added that the telescopic fork 1 includes an extendable outer fork 101 driven by hydraulic oil. This is the prior art and will not be elaborated here.

[0032] Furthermore, a switching valve 7 is fixedly connected to the side of the bridge frame 4 close to the swing cylinder 6. The switching valve 7 is connected to an inlet and return oil pipeline 14, a rotating oil pipeline 15, and a conversion oil pipeline 16. There are two inlet and return oil pipelines 14, rotating oil pipelines 15, and conversion oil pipelines 16 respectively. The other end of the rotating oil pipeline 15 is connected to the swing cylinder 6. The other end of the conversion oil pipeline 16 is connected to a rotary joint 9. The rotary joint 9 is fixedly connected to the sub-gantry 3. A telescopic oil pipeline 17 is connected between the rotary joint 9 and the telescopic fork 1. A connecting oil pipe 18 is connected between the two forks on both sides of the telescopic fork 1. The telescopic oil pipeline 17 includes a first inlet and outlet oil pipe 1701 and a second inlet and outlet oil pipe 1702.

[0033] Through the settings and cooperation of the swing cylinder 6, switching valve 7, telescopic oil pipeline 17, etc., the switching valve 7 is used to conveniently switch the flow direction of hydraulic oil, successfully realizing the controllable rotation of the swing cylinder 6 and the convenient telescoping of the outer fork 101, and cooperating with the bridge 4 to controllably slide on the side shift carriage 5, enabling the forklift equipped with this fork head to operate on double-deep shelves, with higher operating efficiency, and having a low requirement for the lane width. It does not require the forklift to reverse or turn during operation. At the same time, since the telescoping direction of the outer fork 101 can be different from the forward direction of the forklift, the operator can directly observe the operation of the outer fork 101, having a better observation field of view and improving the work efficiency of the operator.

[0034] Referring to Figures 2-4 As shown, in an optional embodiment, a lifting mechanism 11 is fixedly connected to the top surface of the swing cylinder 6. A sprocket carrier 12 is provided at the top telescopic end of the lifting mechanism 11. A sprocket 1201 is rotatably connected to the inner side of the sprocket carrier 12. The sprocket 1201 is connected to a chain 13. One end of the chain 13 is fixedly connected to the fork carriage 2, and the other end of the chain 13 is fixedly connected to a weighing sensor 10. The weighing sensor 10 is fixedly connected to the auxiliary mast 3.

[0035] It should be noted that the lifting mechanism 11 can be set as an oil cylinder, a cylinder, or a telescopic rod, and the telescopic ends of the oil cylinder, cylinder, or telescopic rod are all located at their tops.

[0036] Through the settings and cooperation of the sprocket carrier 12, chain 13, weighing sensor 10, etc., the upward movement of the lifting mechanism 11 is utilized to pull up the fork carriage 2 by the chain 13, successfully realizing the upward movement of the fork carriage 2. And the weighing sensor 10 can measure the weight of the goods carried by the telescopic fork 1 and the outer fork 101 through the chain 13, avoiding damage to the telescopic fork 1 and the outer fork 101 caused by overloaded goods and damage to the goods caused by falling, greatly improving the safety during the operation of this device. The structure is exquisitely and efficiently set up and is suitable for popularization and use.

[0037] Referring to Figure 4 As shown, in an optional embodiment, two side wheels 1202 are provided on the side wall of the sprocket carrier 12. An inner shaft is fixedly connected to the inner side wall of the sprocket carrier 12. The inner shaft extends out of the side wall of the sprocket carrier 12. The sprocket 1201 rotates on the inner shaft, and the side wheels 1202 rotate on the part of the inner shaft extending out of the sprocket carrier 12.

[0038] It should be noted that the first inlet and outlet oil pipe 1701 bypasses one of the two side wheels 1202, and the second inlet and outlet oil pipe 1702 bypasses the other of the two side wheels 1202.

[0039] Referring to Figure 3As shown, in an alternative embodiment, a side shift motor 8 is provided at the top of the bridge frame 4. The output end of the side shift motor 8 located inside the bridge frame 4 is fixedly connected to a vertical shaft. A rack block is provided on the side of the side shift carriage 5, and a gear is sleeved on the vertical shaft near the rack block. The rack block and the gear are engaged.

[0040] During the use of this device, the operator starts the side shift motor 8, causing the vertical shaft to rotate, thereby causing the gear to rotate. Since the gear is engaged with the rack block provided on the side shift carriage 5, the controllable sliding of the bridge frame 4 on the side shift carriage 5 is successfully achieved.

[0041] Refer to Figure 1 As shown, in an alternative embodiment, a fixed block is provided at the top of the fork carriage 2 directly below the side wheel 1202 for fixing the first inlet and outlet oil pipe 1701 and the second inlet and outlet oil pipe 1702 that bypass the side wheel 1202.

[0042] Through the setting of the fixed block, the first inlet and outlet oil pipe 1701 and the second inlet and outlet oil pipe 1702 are always located on the side wheel 1202 during the up and down movement of the sprocket carrier 12, avoiding the chaos of the telescopic oil pipeline 17 during the up and down movement of the fork carriage 2, thereby affecting the transmission of hydraulic oil and even blocking the movement of the fork carriage 2. It should be noted that the first inlet and outlet oil pipe 1701 and the second inlet and outlet oil pipe 1702 are in a non-tight state on the side wheel 1202.

[0043] Refer to Figure 6 As shown, a forklift including a telescopic double-depth three-way fork head includes a forklift body 19. A telescopic double-depth three-way fork head is provided at the front end of the forklift body 19, and the side wall of the side shift carriage 5 away from the bridge frame 4 is fixedly connected to the front end of the forklift body 19.

[0044] It should be noted that the hydraulic oil entering the switching valve 7 from the inlet and return oil pipeline 14 is provided by the forklift body 19.

[0045] Now, the working principle of the present invention is described through the operation process of a forklift equipped with a telescopic double-depth three-way fork head: When it is necessary to control the rotation of the fork carriage 2 and the telescopic fork 1 provided thereon, it is only necessary to control the hydraulic oil provided by the forklift body 19 to enter the switching valve 7 through the inlet and return oil pipeline 14. At this time, the switching valve 7 opens the valve leading to the swing cylinder 6, and the hydraulic oil will enter the swing cylinder 6 from the switching valve 7 through the rotating oil pipeline 15. It should be noted that among the two inlet and return oil pipelines 14, when one is for oil inlet, the other is for oil return. Similarly, among the two rotating oil pipelines 15 and the conversion oil pipeline 16, when one is for oil inlet, the other is for oil return. By using the hydraulic oil being input into the swing cylinder 6 and recovered from the swing cylinder 6, the rotation of the rotating shaft of the swing cylinder 6 is flexibly controlled.

[0046] When it is necessary to control the extension or retraction of the outer fork 101, only the switching valve 7 needs to be controlled to open the valve leading to the rotary joint 9. The hydraulic oil will enter the rotary joint 9 from the switching valve 7 through the conversion oil pipeline 16, and then enter the telescopic fork 1 through the first inlet and outlet oil pipe 1701. Due to the setting of the connecting oil pipe 18, both side forks of the telescopic fork 1 can access the hydraulic oil, so as to realize the strong extension of the outer fork 101. At the same time, the hydraulic oil returns from the telescopic fork 1 through the second inlet and outlet oil pipe 1702. When the outer fork 101 retracts, the hydraulic oil enters the telescopic fork 1 through the second inlet and outlet oil pipe 1702 and returns through the first inlet and outlet oil pipe 1701.

[0047] It should be supplemented that one of the first inlet and outlet oil pipe 1701 and the conversion oil pipeline 16 is connected, and the other of the second inlet and outlet oil pipe 1702 and the conversion oil pipeline 16 is connected. The setting of the rotary joint 9 plays a role in fixing the first inlet and outlet oil pipe 1701, the second inlet and outlet oil pipe 1702 and the conversion oil pipeline 16, avoiding chaos when the secondary gantry 3 rotates, so as to affect the operation stability of the device.

[0048] When it is necessary to control the up and down movement of the fork carriage 2 together with the telescopic fork 1 and the outer fork 101 on the secondary gantry 3, only the lifting mechanism 11 needs to be started. When the telescopic end at the top of the lifting mechanism 11 moves upward, the sprocket carrier 12 together with the sprocket 1201 and the side wheel 1202 move upward. Since the weighing sensor 10 is fixed on the secondary gantry 3, the chain 13 is connected to the sprocket 1201, and both ends of the chain 13 are respectively connected with the weighing sensor 10 and the fork carriage 2, so that the fork carriage 2 moves upward on the secondary gantry 3, and then the goods are lifted. During this process, the weighing sensor 10 will detect the weight of the goods lifted on the telescopic fork 1 and the outer fork 101 under the pull of the chain 13. If the weight of the goods exceeds the load threshold of the telescopic fork 1 and the outer fork 101, the fork carriage 2 will stop moving to avoid damage to the telescopic fork 1 and the outer fork 101 caused by the goods and damage caused by the falling of the goods. Among them, there are two cases. One is when the outer fork 101 is in the extended state, and the other is when the outer fork 101 is in the retracted state, each with a load threshold, and this load threshold is determined according to the size of the goods and the actual working conditions.

[0049] The above has described an embodiment of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as used to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A telescopic double-deep three-way fork head, comprising a side-shift slide (5), wherein the side-shift slide (5) is slidably connected to a bridge frame (4), characterized in that: The side end of the bridge frame (4) is fixedly connected to a swing cylinder (6), the top end of the swing cylinder (6) is fixedly connected to a sub-gantry (3), the side wall of the sub-gantry (3) is slidably connected to a fork frame (2), the front of the fork frame (2) is provided with a telescopic fork (1), and the telescopic fork (1) includes an extendable outer fork (101) driven by hydraulic oil; A switching valve (7) is fixedly connected to the side of the bridge frame (4) close to the swing cylinder (6); the switching valve (7) is connected to an oil inlet and return pipeline (14), a rotating oil pipeline (15) and a conversion oil pipeline (16); two oil inlet and return pipelines (14), two rotating oil pipelines (15) and two conversion oil pipelines (16) are provided, and the other end of the rotating oil pipeline (15) is connected to the swing cylinder (6); The other end of the conversion oil pipeline (16) is connected to a rotary joint (9), and the rotary joint (9) is fixedly connected to the auxiliary mast (3); A telescopic oil pipeline (17) is connected between the rotary joint (9) and the telescopic fork (1), and a connecting oil pipe (18) is connected between the two side forks of the telescopic fork (1); The telescopic oil pipeline (17) comprises a first inlet and outlet oil pipe (1701) and a second inlet and outlet oil pipe (1702).

2. A telescopic double-deep three-way fork according to claim 1, characterized in that: The top surface of the swing cylinder (6) is fixedly connected to a lifting mechanism (11), the top telescopic end of the lifting mechanism (11) is provided with a sprocket frame (12), the inner side of the sprocket frame (12) is rotatably connected to a sprocket (1201), the sprocket (1201) is connected to a chain (13), one end of the chain (13) is fixedly connected to the fork frame (2), the other end of the chain (13) is fixedly connected to a weighing sensor (10), and the weighing sensor (10) is fixedly connected to the auxiliary door frame (3).

3. A telescopic double-deep three-way fork according to claim 2, characterized in that: The lifting mechanism (11) can be configured as an oil cylinder, an air cylinder or a telescopic rod.

4. A telescopic double-deep three-way fork according to claim 2, characterized in that: The side wall of the sprocket frame (12) is provided with two side wheels (1202); the inner side wall of the sprocket frame (12) is fixedly connected with an inner shaft, the inner shaft extends out of the side wall of the sprocket frame (12); the sprocket (1201) rotates on the inner shaft, and the side wheels (1202) rotate on the portion of the inner shaft extending out of the sprocket frame (12).

5. A telescopic double-deep three-way fork according to claim 4, characterized in that: The first oil inlet and outlet pipe (1701) bypasses one of the two side wheels (1202), and the second oil inlet and outlet pipe (1702) bypasses the other of the two side wheels (1202).

6. A telescopic double-deep three-way fork according to claim 1, characterized in that: A side shift motor (8) is arranged on the top of the bridge frame (4), and the output end of the side shift motor (8) located inside the bridge frame (4) is fixedly connected to a vertical shaft. A rack block is arranged on the side of the side shift slide (5), and a gear is sleeved on the vertical shaft near the rack block, and the rack block is meshed with the gear.

7. A telescopic double-deep three-way fork according to claim 5, characterized in that: A fixing block is provided at the top end of the fork frame (2) directly below the side wheel (1202) for fixing the first inlet and outlet oil pipe (1701) and the second inlet and outlet oil pipe (1702) that bypass the side wheel (1202).

8. A forklift comprising the telescopic double-deep three-way fork head according to claim 1, characterized in that: It comprises a forklift body (19), the front end of which is provided with a telescopic double-depth three-way fork head, and the side shift slide (5) is fixedly connected to the front end of the forklift body (19) away from the side wall of the bridge frame (4).

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