Clamping and holding pallet fork device and multi-layer shuttle vehicle

Abstract

The invention relates to a clamping fork device which comprises a front rack and a rear rack, fork stretching mechanisms are symmetrically arranged on the front rack and the rear rack, the two fork stretching mechanisms are synchronously connected through a spline shaft, the spline shaft is driven to rotate through a first driving mechanism, a rack is fixedly arranged on the front rack and is in sliding connection with the rear rack, and the rack is arranged on the rear rack. A gear is arranged on the rear rack and is in meshing transmission with the rack, and the gear is driven by a second driving mechanism to rotate. According to the clamping pallet fork device, the moving distance can be accurately controlled when the front rack and the rear rack are clamped, the clamping pallet fork device is used in cooperation with a spline shaft, and the positioning precision is improved. The invention further relates to a multilayer shuttle vehicle which comprises the clamping fork device and walking wheels arranged on the clamping fork device, and the walking wheels comprise a driving wheel and a driven wheel. According to the multi-layer shuttle vehicle provided by the invention, automatic loading and unloading and long-distance transportation can be carried out on goods through the clamping fork device mounted on the vehicle body, the automation degree is high, and the precision is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of shuttle vehicles, and in particular relates to a clamping fork device and a multi-layer shuttle vehicle. Background Art

[0002] Shuttles, primarily driven by sliding friction between wheels and rails, are widely used in the logistics sector. To improve automation, modern shuttles are now equipped with gripping forks to handle items. This increasing level of automation, coupled with increasingly complex operating requirements and working environments, places new challenges on the precision and performance of shuttles and gripping forks. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a clamping fork device and a multi-layer shuttle to address the deficiencies of the existing technology, and to improve the positioning accuracy and performance of the clamping fork device and the multi-layer shuttle through structural improvements.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A clamping fork device includes a front frame and a rear frame. The front frame and the rear frame are symmetrically provided with fork extension mechanisms. The two fork extension mechanisms are synchronously connected through a spline shaft. The spline shaft is driven to rotate by a first drive mechanism. A rack is fixedly provided on the front frame. The rack is slidably connected to the rear frame. A gear is provided on the rear frame and meshes with the rack for transmission. The gear is driven to rotate by a second drive mechanism.

[0006] In order to better implement the present invention, further optimization is made in the above structure, the racks and gears are symmetrically arranged in two groups, and the gears in the two groups are synchronously driven by the second driving mechanism.

[0007] In order to better realize the present invention, further optimization is made in the above structure. The fork extension mechanism is a two-stage fork extension structure. The spline shaft drives the fork extension mechanism to telescopically move through a synchronous belt. A plurality of shift rods are vertically hinged on the fork extension mechanism.

[0008] In order to better implement the present invention, further optimization is made in the above structure, and the first driving mechanism and the second driving mechanism are both motors.

[0009] A multi-layer shuttle comprises the above-mentioned clamping fork device and running wheels arranged on the clamping fork device, wherein the running wheels comprise a driving wheel and a driven wheel, and the driving wheel is driven by a main wheel motor.

[0010] In order to better realize the present invention, further optimization is made in the above structure, which also includes a floating mechanism, which includes a slider and a telescopic spring. The slider is connected to the clamping fork device for sliding up and down, the driven wheel is set on the slider, and a telescopic spring is connected between the slider and the clamping fork device.

[0011] In order to better realize the present invention, further optimization is made in the above structure. A current collector assembly is provided on the clamping fork device, and the current collector assembly is connected to the busbar assembly.

[0012] In order to better implement the present invention, further optimization is made in the above structure, and safety anti-collision devices are provided at the front and rear ends of the clamping fork device.

[0013] In order to better implement the present invention, further optimization is made in the above structure, and the safety anti-collision device includes an infrared light ranging anti-collision component and a buffer anti-collision part.

[0014] In order to better implement the present invention, the above structure is further optimized, and guide wheels are provided on the side of the clamping fork device.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The clamping fork device provided by the present invention adopts a gear-rack meshing transmission mode, so that the front and rear frames can accurately control the moving distance when clamping, and is used in conjunction with the spline shaft to improve the positioning accuracy; multiple levers are vertically hinged on the fork extension mechanism to adapt to the size changes of different boxes.

[0017] 2. The multi-layer shuttle provided by the present invention can automatically load and unload goods and transport them over long distances through a clamping fork device installed on the vehicle body, with a high degree of automation. In addition, a preload force is applied to the driven wheels to adjust the wheel floating phenomenon caused by uneven tracks during the travel of the shuttle vehicle, thereby improving the stability of the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is one of the structural diagrams of the clamping fork device and the multi-layer shuttle vehicle of the present invention;

[0020] Figure 2 This is the second structural diagram of the clamping fork device and the multi-layer shuttle vehicle of the present invention;

[0021] Figure 3 This is a front view of the clamping fork device and the multi-layer shuttle vehicle of the present invention;

[0022] Figure 4 yes Figure 3 A schematic diagram of the partially enlarged structure of the middle part;

[0023] Figure 5 yes Figure 3 Schematic diagram of the locally enlarged structure of B in the middle.

[0024] In the picture:

[0025] 1-front frame, 2-rear frame, 3-fork extension mechanism, 4-spline shaft, 5-first drive mechanism, 6-rack, 7-gear, 8-second drive mechanism, 9-synchronous belt, 10-shift lever, 11-driving wheel, 1101-main wheel motor, 12-driven wheel, 13-slider, 14-telescopic spring, 15-collector assembly, 16-trolley bar assembly, 17-infrared light ranging and anti-collision assembly, 18-buffer and anti-collision member, 19-guide wheel, 20-guide rail. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise specified, the term "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention depending on the specific circumstances.

[0029] Reference Figure 1-Figure 5 , a schematic diagram of the structure of the clamping fork device and the multi-layer shuttle provided by the present invention. The clamping fork device includes a front frame 1 and a rear frame 2, see Figure 1 , the front frame 1 and the rear frame 2 are symmetrically provided with a fork extension mechanism 3, the two fork extension mechanisms 3 are synchronously connected through a spline shaft 4, the spline shaft 4 is driven to rotate by a first driving mechanism 5, the first driving mechanism 5 is a motor, and the fork extension mechanism 3 is a two-level fork extension structure, which is the existing technology and will not be elaborated in detail in this embodiment. The spline shaft 4 drives the fork extension mechanism 3 to telescopically move through a synchronous belt 9. A plurality of shift rods 10 are vertically hinged on the fork extension mechanism 3, which can adapt to different box sizes.

[0030] See Figure 2 A rack 6 is fixedly provided on the front frame 1, and the rack 6 is slidably connected to the rear frame 2. A gear 7 is provided on the rear frame 2 to mesh with the rack 6 for transmission. The gear 7 is driven to rotate by a second drive mechanism 8, and the second drive mechanism 8 is a motor. By setting the transmission mode of meshing of the gear 7 and the rack 6, the front frame 1 and the rear frame 2 can accurately control the moving distance when clamping. When used in conjunction with the spline shaft 4, the positioning accuracy is improved, so that the fork mechanism 3 can accurately dock the position of the cargo. The rack 6 and the gear 7 are set in two groups symmetrically on the left and right, and the gears 7 in the two groups are synchronously driven by the second drive mechanism 8 to improve the structural stability of the clamping fork device. Since the fork mechanism 3 carries the cargo from the side, the forces it receives during the movement are not the same. Through the two synchronously moving gear 7 and rack 6 structures, the stability of the structure can be better guaranteed while ensuring accuracy.

[0031] The multi-layer shuttle includes the above-mentioned clamping fork device and the traveling wheels arranged on the clamping fork device. The traveling wheels include a driving wheel 11 and a driven wheel 12. The driving wheel 11 is driven by the main wheel motor 1101. The high-precision clamping fork device is used to reduce the stability problem of the trolley during travel caused by shelf processing or installation errors.

[0032] See Figure 1The structure also includes a floating mechanism comprising a slider 13 and a telescopic spring 14. The slider 13 is slidably connected to the clamping fork assembly, and the driven wheel 12 is mounted on the slider 13. The telescopic spring 14 is connected between the slider 13 and the clamping fork assembly. The floating mechanism utilizes the elastic force of the telescopic spring 14 to apply a preload to the guide rail 20, ensuring good contact between the driven wheel 12 and the guide rail 20 for smooth operation. This can also address wheel slippage caused by uneven guide rail 20 due to errors in machining and installation.

[0033] The clamping fork device is provided with a collector assembly 15, which is connected to a busbar assembly 16. Figure 5 The collector assembly 15 is powered by the busbar assembly 16 in a sliding contact manner. Compared with a battery-powered multi-layer shuttle vehicle, it is lighter and can carry heavier items.

[0034] The front and rear ends of the clamping fork device are equipped with safety anti-collision devices. The safety anti-collision devices include infrared light ranging anti-collision components 17 and buffer anti-collision parts 18, providing safety protection for the operation of the multi-layer shuttle.

[0035] A guide wheel 19 is provided on the side of the clamping fork device. Figure 4 The contact between the guide wheel 19 and the guide rail 20 is used to accurately control the trajectory of the multi-layer shuttle to avoid deviation.

[0036] Working principle:

[0037] The multi-level shuttle is mounted on guide rails 20 for long-distance cargo transport. It is powered by sliding contact with the busbar assembly 16 via the current collector assembly 15. During movement, the elastic force of the telescopic spring 14 applies a preload to the guide rail 20, ensuring good contact between the driven wheel 12 and the guide rail 20 for smooth operation and preventing slippage. The gripping fork mechanism utilizes a gear 7 and rack 6 meshing transmission method, allowing precise adjustment of the distance between the two fork mechanisms 3 and controlling their extension to fork and handle cargo, improving positioning accuracy.

[0038] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A clamping fork device, characterized in that: The invention comprises a front frame (1) and a rear frame (2), wherein the front frame (1) and the rear frame (2) are both symmetrically provided with fork extension mechanisms (3), the two fork extension mechanisms (3) are synchronously connected via a spline shaft (4), the spline shaft (4) is driven to rotate via a first driving mechanism (5), a rack (6) is fixedly provided on the front frame (1), the rack (6) is slidably connected to the rear frame (2), a gear (7) is provided on the rear frame (2) and meshes with the rack (6) for transmission, and the gear (7) is driven to rotate via a second driving mechanism (8).

2. The clamping fork device according to claim 1, characterized in that: The racks (6) and the gears (7) are arranged in two groups symmetrically on the left and right, and the gears (7) in the two groups are synchronously driven by the second driving mechanism (8).

3. The clamping fork device according to claim 1, characterized in that: The fork extension mechanism (3) is a two-stage fork extension structure. The spline shaft (4) drives the fork extension mechanism (3) to telescopically move via a synchronous belt (9). A plurality of shifting rods (10) are vertically hinged on the fork extension mechanism (3).

4. The clamping fork device according to claim 1, characterized in that: The first driving mechanism (5) and the second driving mechanism (8) are both motors.

5. A multi-layer shuttle vehicle, characterized in that: It comprises a clamping fork device as claimed in any one of claims 1 to 4 and a traveling wheel arranged on the clamping fork device, wherein the traveling wheel comprises a driving wheel (11) and a driven wheel (12), and the driving wheel (11) is driven by a main wheel motor (1101).

6. The multi-layer shuttle vehicle according to claim 5, characterized in that: The invention also comprises a floating mechanism, wherein the floating mechanism comprises a slider (13) and a telescopic spring (14); the slider (13) is connected to the clamping fork device in an up-and-down sliding manner; the driven wheel (12) is arranged on the slider (13); and a telescopic spring (14) is connected between the slider (13) and the clamping fork device.

7. The multi-layer shuttle vehicle according to claim 5, characterized in that: The clamping fork device is provided with a current collector assembly (15), and the current collector assembly (15) is connected to a busbar assembly (16).

8. The multi-layer shuttle vehicle according to claim 5, characterized in that: The front and rear ends of the clamping fork device are both provided with safety anti-collision devices.

9. The multi-layer shuttle vehicle according to claim 8, characterized in that: The safety anti-collision device comprises an infrared light ranging anti-collision component (17) and a buffer anti-collision component (18).

10. The multi-layer shuttle vehicle according to claim 9, characterized in that: A guide wheel (19) is arranged on the side of the clamping fork device.

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