Pallet fork with bearing wheels capable of being withdrawn after fork plate is lifted

Abstract

The utility model provides a pallet fork capable of withdrawing a bearing wheel after a fork plate is lifted, which comprises the fork plate, a pull rod, a pull rod seat, a bearing wheel frame, the bearing wheel and a swing arm positioned above the pull rod seat, and the pull rod seat is respectively connected with the rear end part of the pull rod and a jacking mechanism through a first rotating shaft and a second rotating shaft. The bearing wheel frame is rotationally connected with the front end of the pull rod and the fork plate through a third rotating shaft and a fourth rotating shaft respectively, the fourth rotating shaft is located behind the third rotating shaft and located above the fork plate, and the upper end and the lower end of the swing arm are connected with the driving unit and the pull rod seat through a fifth rotating shaft capable of moving vertically and a sixth rotating shaft located below the front portion of the fifth rotating shaft respectively. The fifth rotating shaft can be driven by the driving unit to translate upwards, so that the swing arm rotates backwards around the fifth rotating shaft, the pull rod seat is pulled backwards to rotate forwards and upwards around the second rotating shaft, the pull rod pushes the third rotating shaft forwards and upwards, and the bearing wheel frame rotates to drive the bearing wheel to retract. And the application range is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of cargo forks, in particular to a cargo fork with a bearing wheel that can be retracted after a fork plate is raised. Background Art

[0002] The fork is a main component for forklifting pallets and is widely installed in the front of the body of a hydraulic forklift, an electric forklift, an AGV forklift, a stacker and a transporter. Most of the existing forks include a fork plate for carrying the pallet, a tie rod arranged under the fork plate, a tie rod seat rotatably connected to the rear end of the tie rod, a load-bearing wheel frame rotatably connected to the front end of the fork plate, a jacking mechanism for jacking up the tie rod seat, and a load-bearing wheel arranged on the load-bearing wheel frame, and the load-bearing wheel frame is also rotatably connected to the front end of the tie rod. For example, Chinese patents CN109823989B, CN217996716U and CN218968790U disclose this type of fork. When the jacking mechanism jacks up the tie rod seat, the rear end of the fork plate rises accordingly, and at the same time, the tie rod seat drives the rear end of the tie rod to rotate rearward and downward, so that the tie rod pulls the load-bearing wheel frame rearward and downward to make it stand up, thereby causing the load-bearing wheel to jack up the front end of the fork plate, so that the fork plate rises and the pallet on the fork plate is lifted off the ground for transporting the pallet.

[0003] However, the load-bearing wheels of this type of fork are always on the ground. When transporting ordinary pallets, they can be inserted smoothly. However, when transporting double-sided pallets (such as field pallets), the ribs on both sides of the pallet will block the entry of the load-bearing wheels, making it difficult for the fork to be inserted into the double-sided pallet for transportation. Utility Model Content

[0004] The utility model aims to solve the problems of the prior art and provides a fork whose load-bearing wheels can be retracted after the fork plate is raised. The fork can be easily inserted into a double-sided pallet and has a wider range of applications.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is that the fork with the load-bearing wheel can be retracted after the fork plate is raised, including:

[0006] Fork plate;

[0007] A pull rod extending in a front-to-rear direction and disposed below the fork plate;

[0008] A tie rod seat, wherein the tie rod seat is rotatably connected to the rear end of the tie rod via a first rotating shaft, and the tie rod seat is connected to the jacking mechanism via a second rotating shaft, and the second rotating shaft is located behind the first rotating shaft;

[0009] A load-bearing wheel frame, wherein the load-bearing wheel frame is rotatably connected to the front end of the pull rod via a third rotating shaft, and the load-bearing wheel frame is also rotatably connected to the front end of the fork plate via a fourth rotating shaft;

[0010] A load-bearing wheel, the load-bearing wheel is rotatably disposed on the load-bearing wheel frame, and the load-bearing wheel is located in front of the third rotating shaft and the fourth rotating shaft;

[0011] A swing arm, the swing arm being located above the pull rod seat;

[0012] The fourth rotating shaft is located behind the third rotating shaft and above the fork plate; the upper end of the swing arm is connected to the driving unit through the fifth rotating shaft, and the lower end of the swing arm is rotatably connected to the pull rod seat through the sixth rotating shaft. The fifth rotating shaft can be set to move up and down, and the sixth rotating shaft is located in front and below the fifth rotating shaft and above the first rotating shaft and the second rotating shaft.

[0013] Preferably, the second rotating shaft is located below and behind the sixth rotating shaft.

[0014] Preferably, the projection of the pull rod seat in the left-right direction is a triangle, the sixth rotating shaft is arranged close to the vertex of the triangle, and the first rotating shaft and the second rotating shaft are arranged close to two bases of the triangle.

[0015] Further preferably, the vertex angle is an acute angle.

[0016] Preferably, the pull rod seat includes two clamping plates, which are respectively clamped on the left and right sides of the rear end of the pull rod, and the first rotating shaft, the second rotating shaft and the sixth rotating shaft are mounted between the two clamping plates.

[0017] Further preferably, the two clamping plates are connected to at least one of the first rotating shaft, the second rotating shaft and the sixth rotating shaft as a whole.

[0018] Preferably, the rear end portion of the fork plate is overlapped on the second rotating shaft.

[0019] Preferably, two sides of the fork plate extend downward to form a cover shell covering the load-bearing wheel frame and the load-bearing wheel.

[0020] Further preferably, two end portions of the fourth rotating shaft are rotatably connected to the inner wall of the cover shell.

[0021] Preferably, there are two groups of load-bearing wheels, and the wheel axles of the two groups of load-bearing wheels are rotatably connected to the front and rear ends of the adapter plate respectively, and the middle part of the adapter plate is rotatably connected to the load-bearing wheel frame via a seventh rotating shaft.

[0022] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0023] 1. It can retain the functions of traditional forks. Specifically, when the lifting mechanism is in action, it can drive the second rotating shaft to translate upward, rotate the pull rod seat, and rotate the first rotating shaft backward and downward around the second rotating shaft, thereby pulling the pull rod backward and downward, causing the pull rod to pull the third rotating shaft backward and downward, and then the load-bearing wheel frame is driven by the third rotating shaft to rotate backward around the fourth rotating shaft to stand up, so that the load-bearing wheel lifts the front end of the fork plate, so that the fork plate rises and the normal transportation of the pallet is realized.

[0024] 2. The auxiliary wheels can also be retracted after the fork plate is raised. Specifically, after the fork plate is raised, the driving unit can be activated to drive the fifth rotating shaft to translate upward, so that the swing arm can rotate backward around the fifth rotating shaft, thereby driving the sixth rotating shaft to pull the pull rod seat backward to rotate the pull rod seat, driving the first rotating shaft to rotate forward and upward around the second rotating shaft, so that the pull rod pushes the third rotating shaft forward and upward, and then the load-bearing wheel frame is driven by the third rotating shaft to rotate forward and upward around the fourth rotating shaft, and the rotation of the load-bearing wheel frame drives the load-bearing wheels to be retracted, so that the fork can be easily inserted into the double-sided pallet, and the scope of application is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic diagram of a preferred embodiment of the utility model connected to a vehicle body.

[0026] Figure 2 yes Figure 1 The enlarged three-dimensional schematic diagram of the middle cargo fork with the fork plate hidden. At this time, the fork plate is raised and the load-bearing wheels are in a state of extending out of the fork plate and touching the ground.

[0027] Figure 3 yes Figure 1 The three-dimensional enlarged schematic diagram of the middle cargo fork with the fork plate hidden, at this time, the fork plate is raised and the load-bearing wheel frame is in a state of being retracted into the fork plate.

[0028] Among them: 1. Fork; 2. Vehicle body; 11. Fork plate; 12. Cover; 20. Pull rod; 30. Pull rod seat; 31. First rotating shaft; 32. Second rotating shaft; 33. Clamp; 40. Load-bearing wheel frame; 41. Third rotating shaft; 42. Fourth rotating shaft; 43. Load-bearing wheel; 44. Adapter plate; 45. Seventh rotating shaft; 50. Swing arm; 51. Fifth rotating shaft; 52. Sixth rotating shaft. DETAILED DESCRIPTION

[0029] The front and back, up and down, left and right directions described in the present invention are Figure 2 The front and back, up and down, left and right directions.

[0030] like Figures 1 to 3As shown, the fork 1 provided by the utility model can retract the load-bearing wheels after the fork plate is raised, and is connected to the front end of a vehicle body 2 (only a part is shown in the figure). The vehicle body 2 can be the body of a hydraulic forklift, an electric forklift, an AGV forklift, a stacker, a transporter, etc., which is not limited here. The fork 1 includes a fork plate 11, a pull rod 20, a pull rod seat 30, a load-bearing wheel frame 40, a load-bearing wheel 43, and a swing arm 50, wherein the fork plate 11 extends in the front-to-back direction, and the fork plate 11 is used to insert a pallet to support the pallet; the pull rod 20 extends in the front-to-back direction and is arranged below the fork plate 11; the bottom front part of the pull rod seat 30 is rotatably connected to the rear end of the pull rod 20 through a first rotating shaft 31, and a second rotating shaft 32 is provided at the bottom rear part of the pull rod seat 30, and the second rotating shaft 32 is located behind the first rotating shaft 31, and the second rotating shaft 32 is fixedly connected to the jacking mechanism ; The load-bearing wheel frame 40 is rotatably connected to the front end of the pull rod 20 through the third rotating shaft 41, and the load-bearing wheel frame 40 is also rotatably connected to the front end of the fork plate 11 through the fourth rotating shaft 42, and the fourth rotating shaft 42 is located behind the third rotating shaft 41 and above the fork plate 11; the load-bearing wheel 43 is rotatably arranged on the load-bearing wheel frame 40, and the load-bearing wheel 43 is located in front of the third rotating shaft 41 and the fourth rotating shaft 42; the swing arm 50 is located above the pull rod seat 30, and the upper end of the swing arm 50 is connected to the driving unit through the fifth rotating shaft 51, and the lower end of the swing arm 50 is rotatably connected to the pull rod seat 30 through the sixth rotating shaft 52, the fifth rotating shaft 51 can be set to translate up and down, and the driving unit is used to drive the fifth rotating shaft to translate up and down, and the sixth rotating shaft 52 is located in front of and below the fifth rotating shaft 51 and above the first rotating shaft 31 and the second rotating shaft 32.

[0031] The advantages of this setting are:

[0032] 1. It can retain the functions of traditional forks. Specifically, when the lifting mechanism is in action, it can drive the second rotating shaft to translate upward, rotate the pull rod seat, and rotate the first rotating shaft backward and downward around the second rotating shaft, thereby pulling the pull rod backward and downward, causing the pull rod to pull the third rotating shaft backward and downward, and then the load-bearing wheel frame is driven by the third rotating shaft to rotate backward around the fourth rotating shaft to stand up, so that the load-bearing wheel lifts the front end of the fork plate, so that the fork plate rises and the normal transportation of the pallet is realized.

[0033] 2. The auxiliary wheels can also be retracted after the fork plate is raised. Specifically, after the fork plate is raised, the driving unit can be activated to drive the fifth rotating shaft to translate upward, so that the swing arm can rotate backward around the fifth rotating shaft, thereby driving the sixth rotating shaft to pull the pull rod seat backward to rotate the pull rod seat, driving the first rotating shaft to rotate forward and upward around the second rotating shaft, so that the pull rod pushes the third rotating shaft forward and upward, and then the load-bearing wheel frame is driven by the third rotating shaft to rotate forward and upward around the fourth rotating shaft, and the rotation of the load-bearing wheel frame drives the load-bearing wheels to be retracted, so that the fork can be easily inserted into the double-sided pallet, and the scope of application is wider.

[0034] In this embodiment, the second rotating shaft 32 is located at the rear and lower part of the sixth rotating shaft 52. Specifically, the projection of the pull rod seat 30 in the left and right directions is a triangle. The sixth rotating shaft 52 is arranged close to the top angle of the triangle, and the first rotating shaft 31 and the second rotating shaft 32 are arranged close to the two bases of the triangle. Preferably, the top angle of the triangle is an acute angle.

[0035] For the convenience of setting, the pull rod seat 30 further includes two clamping plates 33, which are respectively clamped on the left and right sides of the rear end of the pull rod 20, and the first rotating shaft 31, the second rotating shaft 32 and the sixth rotating shaft 52 are mounted between the two clamping plates 33. The two clamping plates 33 are connected to the second rotating shaft 32 as a whole, and together constitute the pull rod seat 30.

[0036] In order to achieve balanced lifting of the front and rear ends of the fork plate 11, in the present embodiment, the rear end of the fork plate 11 is overlapped on the second rotating shaft 32. To improve the aesthetics and facilitate the setting, further, both sides of the fork plate 11 extend downward to form a cover shell 12 covering the load-bearing wheel frame 40 and the load-bearing wheel 43. At the same time, the two ends of the fourth rotating shaft 42 are rotatably connected to the inner wall of the cover shell 12.

[0037] To improve the carrying stability, in the present embodiment, there are two groups of load-bearing wheels 43, and the wheel axles of the two groups of load-bearing wheels 43 are rotatably connected to the front and rear ends of the adapter plate 44 respectively. The middle part of the adapter plate 44 is rotatably connected to the load-bearing wheel frame 40 via the seventh rotating shaft 45, and the seventh rotating shaft 45 is located in front of the third rotating shaft 41 and the fourth rotating shaft 42.

[0038] It should be noted that, in the present invention, the first rotating shaft 31, the second rotating shaft 32, the third rotating shaft 41, the fourth rotating shaft 42, the fifth rotating shaft 51, the sixth rotating shaft 52, and the seventh rotating shaft 45 all extend horizontally in the left-right direction; the jacking mechanism can be realized by existing technologies such as hydraulic jacking, electric jacking, hydraulic-electric combined jacking, etc.; the driving unit is also existing technology, such as the use of motor + screw pair drive; the up and down translation of the second rotating shaft 32 and the fifth rotating shaft 51 can be realized by setting a slide groove extending in the up and down direction, so that the two ends of the second rotating shaft and the fifth rotating shaft are inserted in the slide groove, or it can be realized by a slide rail pair extending in the up and down direction, which are all existing technologies and will not be described here.

[0039] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A fork with a load-bearing wheel that can be retracted after the fork plate is raised, comprising: Fork plate; A pull rod extending in a front-to-rear direction and disposed below the fork plate; A pull rod seat, wherein the pull rod seat is rotatably connected to the rear end of the pull rod through a first rotating shaft, and a second rotating shaft is also provided on the pull rod seat, the second rotating shaft is located behind the first rotating shaft, and the second rotating shaft is fixedly connected to the jacking mechanism; A load-bearing wheel frame, wherein the load-bearing wheel frame is rotatably connected to the front end of the pull rod via a third rotating shaft, and the load-bearing wheel frame is also rotatably connected to the front end of the fork plate via a fourth rotating shaft; A load-bearing wheel, the load-bearing wheel is rotatably disposed on the load-bearing wheel frame, and the load-bearing wheel is located in front of the third rotating shaft and the fourth rotating shaft; A swing arm, the swing arm being located above the pull rod seat; Features: The fourth rotating shaft is located behind the third rotating shaft and above the fork plate; the upper end of the swing arm is connected to the driving unit through the fifth rotating shaft, and the lower end of the swing arm is rotatably connected to the pull rod seat through the sixth rotating shaft. The fifth rotating shaft can be set to move up and down, and the sixth rotating shaft is located in front and below the fifth rotating shaft and above the first rotating shaft and the second rotating shaft.

2. The fork with retractable load-bearing wheels after the fork plate is raised according to claim 1, characterized in that: The second rotating shaft is located at the rear and lower part of the sixth rotating shaft.

3. The fork with retractable load-bearing wheels after the fork plate is raised according to claim 1, characterized in that: The projection of the pull rod seat in the left-right direction is a triangle, the sixth rotating shaft is arranged close to the vertex of the triangle, and the first rotating shaft and the second rotating shaft are arranged close to two bases of the triangle.

4. The fork with retractable load-bearing wheels after the fork plate is raised according to claim 3, characterized in that: The vertex angle is an acute angle.

5. The fork with retractable load-bearing wheels after the fork plate is raised according to claim 1, characterized in that: The pull rod seat comprises two clamping plates, which are respectively clamped on the left and right sides of the rear end of the pull rod, and the first rotating shaft, the second rotating shaft and the sixth rotating shaft are mounted between the two clamping plates.

6. The fork with retractable load-bearing wheels after the fork plate is raised according to claim 5, characterized in that: The two clamping plates are connected to at least one of the first rotating shaft, the second rotating shaft and the sixth rotating shaft as a whole.

7. The fork with retractable load-bearing wheels after the fork plate is raised according to claim 1, characterized in that: The rear end portion of the fork plate is overlapped on the second rotating shaft.

8. The fork with retractable load-bearing wheels after the fork plate is raised according to claim 1, characterized in that: Both sides of the fork plate extend downward to form a cover shell covering the load-bearing wheel frame and the load-bearing wheel.

9. The fork with retractable load-bearing wheels after the fork plate is raised according to claim 8, characterized in that: The two ends of the fourth rotating shaft are rotatably connected to the inner wall of the cover shell.

10. The fork with retractable load-bearing wheels after the fork plate is raised according to claim 1, characterized in that: There are two groups of load-bearing wheels, and the wheel axles of the two groups of load-bearing wheels are rotatably connected to the front and rear ends of the adapter plate respectively, and the middle part of the adapter plate is rotatably connected to the load-bearing wheel frame through a seventh rotating shaft.

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