Door type forklift

By designing lifting track beams and pitch fine-tuning forks in door-type forklifts, the pitch angle adjustment of the forks is solved, and the problem of heavy pressure tilting of the forks after the forks is raised is ensured to ensure that the goods remain horizontal when they are lowered and avoid collision and damage.

CN222877583UActive Publication Date: 2025-05-16ZHANYI INTELLIGENT TECH (SUZHOU) CO LTD
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Patent Information

Application Number
CN202421970575.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-14
Publication Date
2025-05-16
Estimated Expiration
2034-08-14

AI Technical Summary

Technical Problem

After the existing door-type forklifts have forked goods, the forks tilted due to the heavy pressure of the goods, and the front end of the goods lands first, which may cause the goods to shake, deform or damage.

Method used

A door-type forklift is designed, using lifting track beams and pitch fine-tuning forks, which drives the lifting track beams through pulleys or sprockets, and uses limit wheel rails, horizontal slide rails and translation racks to match the limit guide wheels, track grooves and drive gears of the pitch fine-tuning forks to achieve pitch angle adjustment of the forks.

Benefits of technology

By adjusting the pitch angle, the horizontal state of the cargo can be maintained, avoiding the front end of the cargo collided with the ground first, and reducing the risk of cargo shaking and pallet damage.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a door type forklift which comprises a wheel type door type frame (6100) installed on a track through an idler wheel structure. The lifting track beam (6200) is mounted at the front end of the wheel type door-shaped frame (6100) and can do lifting motion along the wheel type door-shaped frame (6100); and the two mutually independent pitching fine-tuning forks (6300) are respectively connected to the lifting track beam (6200) in a horizontally movable manner. According to the door type forklift, after goods are forked, the pitching fine adjustment pallet fork can adjust the pitching angle, so that the phenomenon that the goods at the front end of the pallet fork incline downwards due to the gravity of the goods is overcome, and the bottom face of the goods can still be kept in the horizontal state; therefore, the front end of the bottom of the cargo is prevented from colliding with the ground (or the surface of the conveying equipment) when the cargo is put down.
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Description

Technical Field

[0001] The utility model relates to the technical field of loading and unloading, in particular to a door-type forklift. Background Art

[0002] The applicant has applied for a patent with application number 2024102881680 and the invention name is a portal forklift. After the forks in the forklift structure lift the goods, the forks are subjected to the weight of the goods and only the rear end of the forks bear the force, so the forks as a whole tilt due to the weight of the goods. This causes the front end of the goods to fall to the ground first during the unloading process of the forklift structure because it tilts downward, colliding with the ground, causing the goods (usually steel drums filled with materials on the pallet) to shake or shift, and also causing the front end of the pallet to deform or be damaged due to the concentrated pressure.

[0003] Based on the above problems, it is necessary to provide a forklift device that can adjust the pitch angle after bearing heavy pressure to keep the cargo level. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a portal forklift, which solves the problem that after the cargo is forked, the cargo fork and the cargo thereon are tilted due to the weight of the cargo.

[0005] In order to achieve the above objectives, the following technical solutions are provided:

[0006] A portal forklift, comprising:

[0007] Wheeled portal frame (6100), mounted on tracks via roller structure;

[0008] A lifting track beam (6200) is installed at the front end of the wheeled door frame (6100) and can move up and down along the wheeled door frame (6100);

[0009] Two mutually independent pitch fine-tuning forks (6300) are respectively connected to the lifting track beam (6200) in a horizontally movably manner.

[0010] The lifting track beam (6200) is driven by a pulley or a sprocket to perform lifting movement.

[0011] The lifting track beam (6200) comprises a mutually parallel limiting wheel rail (6210), a horizontal slide rail (6220) and a translation rack (6230), wherein the limiting wheel rail (6210) is located at the upper part, and the horizontal slide rail (6220) and the translation rack (6230) are located at the lower part;

[0012] Correspondingly, the pitch fine-tuning fork (6300) includes a limiting guide wheel (420), a track groove (430) and a track groove driving gear (440), which respectively cooperate with the limiting wheel rail (6210), the horizontal slide rail (6220) and the translation rack (6230).

[0013] The pitch fine-tuning fork comprises:

[0014] A fork body (100) comprises a tooth portion (110) and a vertical plate (120), wherein the tooth portion (110) and the vertical plate (120) are connected to form an L-shape, wherein the tooth portion (110) is arranged horizontally and the vertical plate (120) is arranged vertically;

[0015] A fork base plate (400) is vertically arranged behind the vertical plate (120) and keeps a distance from the vertical plate (120) so as to install a connecting component; a limiting guide wheel (420), a track groove (430) and a track groove driving gear (440) are arranged on the back side of the fork base plate (400);

[0016] A support shaft assembly (200) connected to the lower portion of the area between the fork body (100) and the fork base plate (400) to enable the two to be rotatably supported;

[0017] The adjusting crankshaft assembly (300) is connected to the upper part of the area between the fork body (100) and the fork base plate (400) and is used to adjust the distance between the fork body (100) and the fork base plate (400) at the connection position.

[0018] The adjusting crankshaft assembly (300) comprises a crankshaft body (310), a transmission T-block (320), two side support plates (330) and a driving motor (340), wherein one of the side support plate (330) and the transmission T-block (320) is fixedly connected to the fork body (100), and the other is fixedly connected to the fork base plate (400), the transmission T-block (320) has an elongated hole (321) for accommodating a journal (311) of the crankshaft body (310), and the two shaft ends (312) of the crankshaft body (310) are respectively rotatably connected to one of the side support plates (330).

[0019] A shaft end (312) of the crankshaft body (310) is provided with a journal linkage hole (313), and the drive motor (340) is directly or indirectly connected to the journal linkage hole (313) to drive the crankshaft body (310).

[0020] The crankshaft body (310) is driven by a driving motor (340) via a reducer, and the reducer and the driving motor (340) do not exceed the surface defined by the vertical plate (120).

[0021] The reducer is a planetary reducer or a bevel gear reducer.

[0022] A first ring platform (314) and a second ring platform (315) are further provided at both ends of the journal (311), wherein the diameter of the first ring platform (314) is larger than the diameter of the journal (311), so that the first ring platform (314) protrudes from the journal (311) on all sides, and the first ring platform (314) is located between the journal (311) and a shaft end (312) with a journal linkage hole (313); the second ring platform (315) is located between the journal (311) and the other shaft end (312); the diameter of the second ring platform (315) is smaller than the diameter of the journal (311), so that the ball bearing can be installed on the journal (311) after passing through the second ring platform, and is limited by the first ring platform (314); a limiting structure for limiting the ball bearing is installed on the second ring platform (315), and after the limiting structure is installed on the second ring platform (315), the circumferential dimension should be smaller than the outer ring diameter of the ball bearing.

[0023] The elongated holes (321) are arranged along the vertical direction.

[0024] The fork base plate (400) is also provided with an imaging device (410) for taking images forward.

[0025] Compared with the prior art, the advantages of the utility model are as follows:

[0026] The gantry forklift provided by the utility model can move forward and backward along the track, and drive the pitch fine-adjustment fork to move up and down through the lifting track beam. When the two pitch fine-adjustment forks are moved to both sides to avoid the middle position, the entire gantry forklift can go around the rear of the goods (such as a pallet and a steel drum thereon), so that the lifting track beam can be lowered and the two pitch fine-adjustment forks can be adjusted to move toward the middle so that the goods can be forked. After the goods are forked, the pitch fine-adjustment forks can also adjust the pitch angle, so as to overcome the downward tilt of the goods at the front end of the forks due to the gravity of the goods, so that the bottom surface of the goods can still maintain a horizontal state, so that the front end of the bottom of the goods is prevented from colliding with the ground (or the surface of the conveying equipment) first when the goods are lowered. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the portal forklift described in the utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the portal forklift described in the utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the pitch fine-tuning fork in the embodiment of the utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the crankshaft body in the embodiment of the utility model;

[0031] Figure 5 It is a schematic diagram of the exploded structure of the pitch fine-tuning fork in the embodiment of the utility model;

[0032] Figure 6 It is a schematic diagram of the exploded structure of adjusting the crankshaft assembly in the embodiment of the utility model.

[0033] In the figure:

[0034] 6100 wheeled portal frame;

[0035] 6200 lifting rail beam; 6210 limit wheel rail; 6220 horizontal slide rail; 6230 translation rack;

[0036] 6300 pitch fine-adjustment fork;

[0037] 100-fork body; 110-teeth; 120-vertical plate;

[0038] 200-support shaft assembly;

[0039] 300-adjusting crankshaft assembly; 310 crankshaft body; 320 transmission T block; 330 side support plate; 340 driving motor; 311 journal; 312 shaft end; 313 journal linkage hole; 314 first ring platform; 315 second ring platform; 321 elongated hole;

[0040] 400 - fork base plate; 410 image device; 420 limiting guide wheel; 430 track groove; 440 track groove driving gear. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Example

[0043] like Figure 1-2 As shown, the utility model provides a portal forklift, comprising:

[0044] The wheeled portal frame 6100 is installed on a track (omitted in the figure) through a roller structure; the wheeled structure is mainly a track wheel, and there are four track wheels installed at the four corners of the wheeled portal frame 6100, so that it can move along the track and provide stable support from four different positions; the two track wheels at the front end are close to the pitch fine-tuning fork 6300,

[0045] The lifting track beam 6200 is installed at the front end of the wheeled portal frame 6100 and can move up and down along the wheeled portal frame 6100;

[0046] Two independent pitch fine-tuning forks 6300 are respectively connected to the lifting track beam 6200 in a horizontally movably manner, and each pitch fine-tuning fork is driven by an independent motor.

[0047] The lifting track beam 6200 is driven by a pulley or sprocket to perform lifting movement, wherein the pulley or sprocket is installed on both sides of the front end of the wheeled portal frame 6100. The specific structure of the pulley or sprocket can be adaptively selected and designed by technical personnel in this field. It adopts a conventional pulley or sprocket structure as long as it can meet the lifting requirements of the lifting track beam.

[0048] The lifting track beam 6200 includes a limiting wheel rail 6210, a horizontal slide rail 6220 and a translation rack 6230 which are parallel to each other, wherein the limiting wheel rail 6210 is located at the upper part, and the horizontal slide rail 6220 and the translation rack 6230 are located at the lower part; the lifting track beam 6200 has a rectangular frame structure.

[0049] Correspondingly, the pitch fine-tuning fork 6300 includes a limiting guide wheel 420, a track groove 430 and a track groove driving gear 440, which respectively cooperate with the limiting wheel rail 6210, the horizontal slide rail 6220 and the translation rack 6230, wherein the limiting guide wheel 420 is rollingly connected with the limiting wheel rail 6210, and the track groove 430 is slidingly connected to the horizontal slide rail 6220 and driven by the track groove driving gear 440 on the translation rack 6230, and the track groove driving gear 440 is driven by a motor.

[0050] like Figure 3-6 As shown, the pitch fine-tuning fork 6300 includes:

[0051] The fork body 100 includes a tooth portion 110 and a vertical plate 120, wherein the tooth portion 110 and the vertical plate 120 are connected to form an L-shape, wherein the tooth portion 110 is arranged horizontally and the vertical plate 120 is arranged vertically;

[0052] The fork base plate 400 is vertically arranged behind the vertical plate 120 and keeps a distance from the vertical plate 120 to install the connecting components; the limiting guide wheel 420, the track groove 430 and the track groove driving gear 440 are arranged on the back side of the fork base plate 400;

[0053] A support shaft assembly 200 is connected to the lower portion of the area between the fork body 100 and the fork base plate 400 to enable the two to be rotatably supported;

[0054] The adjusting crankshaft assembly 300 is connected to the upper portion of the area between the fork body 100 and the fork base plate 400, and is used to adjust the distance between the fork body 100 and the fork base plate 400 at the connection position.

[0055] The adjusting crankshaft assembly 300 includes a crankshaft body 310, a transmission T-block 320, two side support plates 330 and a driving motor 340, wherein one of the side support plate 330 and the transmission T-block 320 is fixedly connected to the fork body 100, and the other is fixedly connected to the fork base plate 400, and the transmission T-block 320 has an elongated hole 321 for accommodating the journal 311 of the crankshaft body 310, and the two shaft ends 312 of the crankshaft body 310 are rotatably connected to one side support plate 330 respectively.

[0056] A shaft end 312 of the crankshaft body 310 is provided with a journal linkage hole 313 , and the driving motor 340 is directly or indirectly connected to the journal linkage hole 313 to drive the crankshaft body 310 .

[0057] The crankshaft body 310 is driven by the driving motor 340 through a reducer, and the reducer and the driving motor 340 do not exceed the surface defined by the vertical plate 120 .

[0058] The reducer is a planetary reducer or a bevel gear reducer.

[0059] A first annular platform 314 and a second annular platform 315 are also provided at both ends of the journal 311, wherein the diameter of the first annular platform 314 is larger than the diameter of the journal 311, so that the first annular platform 314 protrudes from the journal 311 on all sides, and the first annular platform 314 is located between the journal 311 and the shaft end 312 with the journal linkage hole 313; the second annular platform 315 is located between the journal 311 and the other shaft end 312; the diameter of the second annular platform 315 is smaller than the diameter of the journal 311, so that the ball bearing can be installed on the journal 311 after passing through the second annular platform, and be limited by the first annular platform 314; a limiting structure for limiting the ball bearing is installed on the second annular platform 315, and after the limiting structure is installed on the second annular platform 315, the circumferential dimension should be smaller than the outer ring diameter of the ball bearing.

[0060] The elongated holes 321 are arranged along the vertical direction.

[0061] The fork base plate 400 is also provided with an imaging device 410 for taking images forward.

[0062] Compared with the prior art, the advantages of the utility model are as follows:

[0063] The gantry forklift provided by the utility model can move forward and backward along the track, and drive the pitch fine-adjustment fork to move up and down through the lifting track beam. When the two pitch fine-adjustment forks are moved to both sides to avoid the middle position, the entire gantry forklift can go around the goods, such as a pallet and the steel drum thereon, so that the lifting track beam can be lowered and the two pitch fine-adjustment forks can be adjusted to move toward the middle so that the goods can be forked. After the goods are forked, the pitch fine-adjustment fork can also adjust the pitch angle, so as to overcome the downward tilt of the goods at the front end of the fork due to the gravity of the goods, so that the bottom surface of the goods can still maintain a horizontal state, so that when the goods are lowered, the front end of the bottom of the goods is prevented from colliding with the ground or the surface of the conveying equipment first.

[0064] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A portal forklift, characterized in that: include: Wheeled portal frame (6100), mounted on tracks via roller structure; A lifting track beam (6200) is installed at the front end of the wheeled door frame (6100) and can move up and down along the wheeled door frame (6100); Two mutually independent pitch fine-adjustment forks (6300), each of which is horizontally movably connected to the lifting track beam (6200); The lifting track beam (6200) is driven by a pulley or a sprocket to perform lifting movement.

2. The portal forklift according to claim 1, characterized in that: The lifting track beam (6200) comprises a position-limiting wheel rail (6210), a horizontal slide rail (6220) and a translation rack (6230) which are parallel to each other, wherein the position-limiting wheel rail (6210) is located at the upper part, and the horizontal slide rail (6220) and the translation rack (6230) are located at the lower part; Correspondingly, the pitch fine-tuning fork (6300) comprises a limiting guide wheel (420), a track groove (430) and a track groove driving gear (440), which respectively cooperate with the limiting wheel rail (6210), the horizontal slide rail (6220) and the translation rack (6230).

3. The portal forklift according to claim 1, characterized in that: The pitch fine-tuning fork comprises: A fork body (100) comprises a tooth portion (110) and a vertical plate (120), wherein the tooth portion (110) and the vertical plate (120) are connected to form an L-shape, wherein the tooth portion (110) is arranged horizontally and the vertical plate (120) is arranged vertically; A fork base plate (400) is vertically arranged behind the upright plate (120) and keeps a distance from the upright plate (120) so as to install a connecting component; a limiting guide wheel (420), a track groove (430) and a track groove driving gear (440) are arranged on the back side of the fork base plate (400); A support shaft assembly (200) connected to the lower portion of the area between the fork body (100) and the fork base plate (400) to enable the two to be rotatably supported; The adjusting crankshaft assembly (300) is connected to the upper part of the area between the fork body (100) and the fork base plate (400) and is used to adjust the distance between the fork body (100) and the fork base plate (400) at the connection position.

4. The portal forklift according to claim 3, characterized in that: The adjustable crankshaft assembly (300) comprises a crankshaft body (310), a transmission T-block (320), two side support plates (330) and a drive motor (340), wherein one of the side support plate (330) and the transmission T-block (320) is fixedly connected to the fork body (100), and the other is fixedly connected to the fork base plate (400), the transmission T-block (320) having an elongated hole (321) for accommodating a journal (311) of the crankshaft body (310), and two shaft ends (312) of the crankshaft body (310) are respectively rotatably connected to one of the side support plates (330).

5. The portal forklift according to claim 4, characterized in that: A shaft end (312) of the crankshaft body (310) is provided with a journal linkage hole (313), and the drive motor (340) is directly or indirectly connected to the journal linkage hole (313) to drive the crankshaft body (310).

6. The portal forklift according to claim 4, characterized in that: The crankshaft body (310) is driven by a driving motor (340) via a reducer, and the reducer and the driving motor (340) do not exceed a surface defined by the vertical plate (120).

7. The portal forklift according to claim 6, characterized in that: The reducer is a planetary reducer or a bevel gear reducer.

8. The portal forklift according to claim 5, characterized in that: A first ring platform (314) and a second ring platform (315) are further provided at both ends of the journal (311), wherein the diameter of the first ring platform (314) is larger than the diameter of the journal (311), so that the first ring platform (314) protrudes around the journal (311), and the first ring platform (314) is located between the journal (311) and a shaft end (312) with a journal linkage hole (313); the second ring platform (315) is located between the journal (311) and the other shaft end (312); the diameter of the second ring platform (315) is smaller than the diameter of the journal (311), so that the ball bearing can pass through the second ring platform and be installed on the journal (311), and be limited by the first ring platform (314); a limiting structure for limiting the ball bearing is installed on the second ring platform (315), and after the limiting structure is installed on the second ring platform (315), the circumferential dimension should be smaller than the outer ring diameter of the ball bearing.

9. The portal forklift according to claim 8, characterized in that: The elongated holes (321) are arranged along the vertical direction.

10. The portal forklift according to claim 3, characterized in that: The fork base plate (400) is also provided with an imaging device (410) for capturing images forward.