Telescopic pallet fork for stacking machine
By using the servo motor drive gear rack structure and the limit parts driven by the telescopic cylinder in the telescopic fork of the stacker, the problem of the cargo box falling due to inertia shaking during the pickup process is solved, and a more stable pickup action is achieved.
Patent Information
- Application Number
- CN202421753181.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-24
AI Technical Summary
During the process of collecting telescopic forks of the stacker, the cargo box is prone to falling off the pallet due to inertia shaking, resulting in unstable pickup action.
A telescopic fork for stackers is designed, and the telescopic arm is expanded by using a servo motor drive gear rack structure to realize the telescopic arm. A limit piece driven by a telescopic cylinder is set on the pallet. The limit piece extends out when the cargo box is lifted and is fixed on the front and rear sides of the cargo box to prevent the cargo box from shaking.
It effectively reduces the situation where the cargo box is shaken or dropped by inertia during the telescopic arm expansion and contraction process, and improves the stability of the telescopic fork pickup action.
Smart Images
Figure CN222907477U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of stackers, and particularly to a telescopic fork for a stacker. Background Art
[0002] The development of warehousing logistics is very rapid, especially for large-item warehouse logistics. In order to make the best use of the warehouse area as much as possible, the shelves in the warehouse are large and very high. Therefore, special cranes, stackers, for accessing goods from high-level shelves have emerged as the times require. Stackers can be divided into low-level type, middle-level type and high-level type according to height. Among them, the low-level stacker refers to a stacker with a lifting height of less than 5m, which is mainly used in split high-level shelf warehouses and simple stereoscopic warehouses.
[0003] Among them, the stacker is one of the important tools in the warehouse logistics handling robot system, and the fork is one of the components of the stacker. In order to meet different requirements for picking and placing goods, the fork correspondingly has different structures. Specifically, the fork can be divided into a telescopic fork and a clamping fork.
[0004] The telescopic fork is divided into a single-extension fork and a double-extension fork. Currently, single-extension forks are commonly used in the market. It mainly includes a base, a telescopic arm and a pallet. Among them, a gear-rack structure is provided between the base and the telescopic arm, and between the telescopic arm and the pallet. Driven by a servo motor installed on the base, the telescopic arm and the pallet can be driven to extend or retract. The process of picking up goods is as follows: after the fork extends to reach below the goods, the stacker drives the fork to rise to make the goods leave the shelf; after picking up the goods, the fork retracts.
[0005] However, no mechanism for positioning the cargo box is provided on the common pallet. During the process of the telescopic fork extending and retracting to perform the picking operation, due to the inertia of the cargo box itself, the cargo box is prone to shake along the telescopic direction during the sliding process of the pallet along the telescopic direction of the telescopic arm. Utility Model Content
[0006] In order to improve the stability of the telescopic fork when performing the picking operation, the present application provides a telescopic fork for a stacker.
[0007] The telescopic fork for a stacker provided by the present application adopts the following technical solutions:
[0008] A telescopic fork for a stacker is installed on the stacker and includes a base. A first telescopic arm is slidably connected inside the base, and a second telescopic arm is slidably connected to the outside of the first telescopic arm;
[0009] A servo motor is fixedly connected to the base. A main drive gear is fixedly connected to the drive shaft of the servo motor. A first transmission gear set is rotatably installed in the base. The main drive gear meshes with the first transmission gear set. A first rack is fixedly connected to the bottom of the first telescopic arm. The first rack meshes with the first transmission gear set;
[0010] A second rack is fixedly connected to the base. A second transmission gear set is fixedly connected to the first telescopic arm. The bottom end of the second transmission gear set meshes with the second rack;
[0011] A support plate is fixedly connected to the top of the second telescopic arm. A third rack is fixedly connected to the bottom of the support plate. The third rack meshes with the top end of the second transmission gear set;
[0012] A number of limiting members are arranged on the support plate in a lifting manner. A telescopic cylinder is fixedly connected to the side wall of the second telescopic arm. The driving end of the telescopic cylinder is fixedly connected to the limiting member.
[0013] By adopting the above technical solution, during the goods picking process, the servo motor drives the main drive gear to rotate. Since the main drive gear meshes with the first transmission gear set, it can synchronously drive the first transmission gear set to rotate and drive the first rack meshing with the first transmission gear set to move, achieving the technical effect of driving the first telescopic arm to move; during the sliding process of the first telescopic arm, the second rack on the first telescopic arm synchronously drives the second transmission gear set in the first telescopic arm to rotate and drives the third rack fixedly connected to the top plate to slide through the second transmission gear set, achieving the technical effect of simultaneously extending the first telescopic arm and the second telescopic arm. When the support plate extends into the bottom of the cargo box and lifts the cargo box, the telescopic cylinder drives the limiting member to extend out from the surface of the support plate and limit it on the front and rear sides of the cargo box, which can effectively reduce the situation that the cargo box shakes due to inertia during the telescopic process of the telescopic arm or even falls off the support plate, and can effectively improve the stability of the goods picking action of the telescopic forklift.
[0014] Preferably, the limiting member includes a connecting plate. The bottom of the connecting plate is fixedly connected to the cylinder shaft of the telescopic cylinder. A limiting plate is fixedly connected to the top of the connecting plate;
[0015] A sliding hole for the limiting plate to pass through is formed through the support plate. The limiting plate is slidably arranged in the sliding hole.
[0016] By adopting the above technical solution, the limiting plate is embedded in the sliding hole, which can reduce the situation of collision between the limiting plate and the cargo box during the process of the telescopic forklift lifting to jack up the cargo box and ensure the smoothness of the goods picking action. After the goods picking is completed, the telescopic cylinder drives the limiting plate to extend out from the sliding hole and limit it on the front and rear sides of the cargo box, which can reduce the situation that the cargo box shakes due to inertia or even falls off the support plate.
[0017] Preferably, it further includes:
[0018] A thin-film pressure sensor, fixedly installed on the surface of the pallet, for detecting the contact pressure between the cargo box and the pallet and outputting a contact pressure signal;
[0019] A comparator chip, signal-connected to the signal output end of the thin-film pressure sensor, for receiving the contact pressure signal and outputting a high-level signal when the contact pressure is greater than the set value and outputting a low-level signal when the contact pressure is less than the set value;
[0020] The signal input ends of several of the telescopic cylinders are signal-connected to the signal output end of the comparator chip. The telescopic cylinders receive the high-level signal and drive the limiting plate to extend out of the sliding hole, and the telescopic cylinders receive the low-level signal and drive the limiting plate to extend into the sliding hole.
[0021] By adopting the above technical solution, through the mutual cooperation and use between the thin-film pressure sensor and the comparator chip, when the pallet is lifted to jack up the cargo box, the contact pressure between the cargo box and the pallet increases. The comparator chip can determine that the cargo box is placed on the pallet. The comparator chip outputs a high-level signal, and the telescopic cylinder receives the high-level signal and extends the limiting plate to limit the cargo box; when the cargo box is removed, the contact pressure value measured by the thin-film pressure sensor decreases, the comparator chip outputs a low-level signal, and the telescopic cylinder receives the low-level signal and drives the limiting plate to extend into the sliding hole, facilitating the removal of the cargo box. Through the mutual cooperation and use of the thin-film pressure sensor and the comparator chip, the extension or retraction of the limiting plate can be automatically controlled according to the action of loading and unloading the cargo box, and the accuracy of the telescopic action of the limiting plate can be improved.
[0022] Preferably, first roller groups and second roller groups are rotatably connected to both sides of the first telescopic arm, and the second roller group is located above the first roller group;
[0023] First sliding grooves are respectively formed on both sides inside the cavity of the base. The first roller groups are located in the first sliding grooves, and both sides of the first roller groups are in contact with the upper and lower groove walls of the first sliding grooves;
[0024] Second sliding grooves are respectively formed on both sides inside the cavity of the second telescopic arm. The second roller groups are located in the second sliding grooves, and both sides of the second roller groups are in contact with the upper and lower groove walls of the second sliding grooves.
[0025] By adopting the above technical solution, while the first roller group and the second roller group can respectively limit the positions of the first telescopic arm and the second telescopic arm, during the sliding process of the first telescopic arm and the second telescopic arm, the sliding friction between the first telescopic arm and the base and between the second telescopic arm and the first telescopic arm can be converted into rolling friction, effectively improving the stability and smoothness of the telescopic movements of the first telescopic arm and the second telescopic arm.
[0026] In summary, the telescopic fork for a stacker of the present application includes at least one of the following beneficial technical effects:
[0027] 1. During the goods picking process, the servo motor drives the main drive gear to rotate. Since the main drive gear meshes with the first transmission gear group, the first transmission gear group can be synchronously driven to rotate, and the first rack meshing with the first transmission gear group can be driven to move, achieving the technical effect of driving the first telescopic arm to move; during the sliding process of the first telescopic arm, the second rack on the first telescopic arm synchronously drives the second transmission gear group in the first telescopic arm to rotate, and drives the third rack fixedly connected to the top plate to slide through the second transmission gear group, achieving the technical effect of simultaneously extending the first telescopic arm and the second telescopic arm;
[0028] 2. When the pallet extends into the bottom of the cargo box and lifts the cargo box, the telescopic cylinder drives the limiting member to extend from the surface of the pallet and limit it on the front and rear sides of the cargo box, which can effectively reduce the situation that the cargo box shakes due to inertia during the telescopic process of the telescopic arm and even falls off the pallet, and can effectively improve the stability of the goods picking action of the telescopic fork. Description of the Drawings
[0029] Figure 1 is a schematic diagram showing the overall structure of the telescopic fork in the embodiment of the present application.
[0030] Figure 2 is a schematic diagram showing the internal structure of the telescopic fork in the embodiment of the present application.
[0031] Description of the Reference Numerals: 1, base; 11, first transmission gear group; 12, second rack; 13, first chute; 2, first telescopic arm; 21, first rack; 22, second transmission gear group; 23, first roller group; 24, second roller group; 3, second telescopic arm; 31, pallet; 311, sliding hole; 32, third rack; 33, second chute; 4, servo motor; 41, main drive gear; 5, limiting member; 51, connecting plate; 52, limiting plate; 6, telescopic cylinder; 7, thin film pressure sensor. Detailed Description of the Embodiment
[0032] The following will further describe the present application in detail Figure 1-2 in conjunction with the attached drawings.
[0033] Embodiment
[0034] An embodiment of the present application discloses a telescopic fork for a stacker. Refer to Figure 1 And Figure 2 , which mainly includes a base 1, a first telescopic arm 2 is slidably connected inside the base 1, and a second telescopic arm 3 is slidably connected to the outside of the first telescopic arm 2.
[0035] A servo motor 4 is fixedly connected to the base 1, a main drive gear 41 is fixedly connected to the drive shaft of the servo motor 4, a first transmission gear set 11 is rotatably installed inside the base 1, the main drive gear 41 meshes with the first transmission gear set 11, a first rack 21 is fixedly connected to the bottom of the first telescopic arm 2, and the first rack 21 meshes with the first transmission gear set 11.
[0036] Refer to Figure 2 , the first transmission gear set 11 is composed of three first transmission gears, the three first transmission gears are arranged in a linear array, and the middle first transmission gear meshes with the first transmission gears on both sides; a first notch for exposing the three first transmission gears is opened at the top of the base 1, and the first rack 21 extends into the first notch and meshes with the tops of the three first transmission gears.
[0037] A second rack 12 is fixedly connected to the base 1, a second transmission gear set 22 is fixedly connected to the first telescopic arm 2, and the bottom end of the second transmission gear set 22 meshes with the second rack 12.
[0038] Refer to Figure 2 . The second transmission gear set 22 is composed of three second transmission gears, the three second transmission gears are arranged in a linear array, and the middle second transmission gear meshes with the second transmission gears on both sides; a second notch for exposing the three second transmission gears is opened at the bottom of the first telescopic arm 2, and the top part of the second rack 12 extends into the second notch.
[0039] A tray 31 is fixedly connected to the top of the second telescopic arm 3, a third rack 32 is fixedly connected to the bottom of the tray 31, and the third rack 32 meshes with the top end of the second transmission gear set 22.
[0040] A plurality of limit members 5 are arranged on the tray 31 in a lifting manner, a telescopic cylinder 6 is fixedly connected to the side wall of the second telescopic arm 3, and the driving end of the telescopic cylinder 6 is fixedly connected to the limit member 5.
[0041] During the goods picking process, the servo motor 4 drives the main drive gear 41 to rotate. Since the main drive gear 41 meshes with the first transmission gear set 11, the first transmission gear set 11 can be synchronously driven to rotate and drive the first rack 21 meshing with the first transmission gear set 11 to move, achieving the technical effect of driving the first telescopic arm 2 to move.
[0042] During the sliding process of the first telescopic arm 2, the second rack 12 on the first telescopic arm 2 synchronously drives the rotation of the second transmission gear set 22 in the first telescopic arm 2, and drives the third rack 32 fixedly connected to the top plate to slide through the second transmission gear set 22, achieving the technical effect of simultaneously extending the first telescopic arm 2 and the second telescopic arm 3.
[0043] When the pallet 31 extends into the bottom of the cargo box and lifts the cargo box, the telescopic cylinder 6 drives the limiting member 5 to extend from the surface of the pallet 31 and limit it on the front and rear sides of the cargo box, which can effectively reduce the situation that the cargo box shakes due to inertia during the telescopic process of the telescopic arm and even falls off the pallet 31, and can effectively improve the stability of the cargo fork picking operation.
[0044] Refer to Figure 1 , the limiting member 5 includes a connecting plate 51, the bottom of the connecting plate 51 is fixedly connected to the cylinder shaft of the telescopic cylinder 6, and a limiting plate 52 is fixedly connected to the top of the connecting plate 51; a sliding hole 311 for the limiting plate 52 to pass through is formed through the pallet 31, and the limiting plate 52 is slidably arranged in the sliding hole 311.
[0045] The limiting plate 52 is embedded in the sliding hole 311, which can reduce the situation of collision between the limiting plate 52 and the cargo box during the process of the telescopic fork lifting to lift the cargo box, and ensure the smoothness of the picking operation. After the picking is completed, the telescopic cylinder 6 drives the limiting plate 52 to extend out of the sliding hole 311 and limit it on the front and rear sides of the cargo box, which can reduce the situation that the cargo box shakes due to inertia and even falls off the pallet 31.
[0046] Refer to Figure 1 , further comprising: a thin film pressure sensor 7, fixedly installed on the surface of the pallet 31, for detecting the contact pressure between the cargo box and the pallet 31 and outputting a contact pressure signal; a comparator chip, signal-connected to the signal output end of the thin film pressure sensor 7, for receiving the contact pressure signal and outputting a high-level signal when the contact pressure is greater than the set value and outputting a low-level signal when the contact pressure is less than the set value; the signal input ends of a plurality of telescopic cylinders 6 are signal-connected to the signal output end of the comparator chip, and the telescopic cylinder 6 receives the high-level signal and drives the limiting plate 52 to extend out of the sliding hole 311, and the telescopic cylinder 6 receives the low-level signal and drives the limiting plate 52 to extend into the sliding hole 311.
[0047] Through the mutual cooperation and use of the thin film pressure sensor 7 and the comparator chip, when the pallet 31 is lifted to lift the cargo box, the contact pressure between the cargo box and the pallet 31 increases, the comparator chip can determine that the cargo box is placed on the pallet 31, the comparator chip outputs a high-level signal, and the telescopic cylinder 6 receives the high-level signal and extends the limiting plate 52 to limit the cargo box.
[0048] When the cargo box is removed, the contact pressure value measured by the thin-film pressure sensor 7 decreases, and the comparator chip outputs a low-level signal. The telescopic cylinder 6 receives the low-level signal and drives the limiting plate 52 to extend into the sliding hole 311, facilitating the removal of the cargo box. By the combined use of the thin-film pressure sensor 7 and the comparator chip, the extension or retraction of the limiting plate 52 can be automatically controlled according to the actions of loading and unloading the cargo box, and the accuracy of the telescopic movement of the limiting plate 52 can be improved.
[0049] Referring to Figure 1 and Figure 2 , on both sides of the first telescopic arm 2, a first roller group 23 and a second roller group 24 are rotatably connected. Among them, both the first roller group 23 and the second roller group 24 are composed of five rollers arranged in a linear array. The second roller group 24 is located above the first roller group 23; on both sides inside the cavity of the base 1, first sliding grooves 13 are formed respectively. The first roller group 23 is located in the first sliding grooves 13, and both sides of the first roller group 23 are in contact with the upper and lower two groove walls of the first sliding grooves 13.
[0050] On both sides inside the cavity of the second telescopic arm 3, second sliding grooves 33 are formed respectively. The second roller group 24 is located in the second sliding grooves 33, and both sides of the second roller group 24 are in contact with the upper and lower two groove walls of the second sliding grooves 33.
[0051] While the first roller group 23 and the second roller group 24 can respectively limit the positions of the first telescopic arm 2 and the second telescopic arm 3, during the sliding process of the first telescopic arm 2 and the second telescopic arm 3, the sliding friction between the first telescopic arm 2 and the base 1 and between the second telescopic arm 3 and the first telescopic arm 2 can be converted into rolling friction, effectively improving the stability and smoothness of the telescopic movements of the first telescopic arm 2 and the second telescopic arm 3.
[0052] The implementation principle of the telescopic fork for the stacker in the embodiment of the present application is as follows: During the process of picking up goods, the servo motor 4 drives the main driving gear 41 to rotate. Since the main driving gear 41 meshes with the first transmission gear group 11, the first transmission gear group 11 can be synchronously driven to rotate, and the first rack 21 meshing with the first transmission gear group 11 can be driven to move, achieving the technical effect of driving the first telescopic arm 2 to move; during the sliding process of the first telescopic arm 2, the second rack 12 on the first telescopic arm 2 synchronously drives the second transmission gear group 22 inside the first telescopic arm 2 to rotate, and drives the third rack 32 fixedly connected to the top plate to slide through the second transmission gear group 22, achieving the technical effect of simultaneously extending the first telescopic arm 2 and the second telescopic arm 3; when the pallet 31 extends into the bottom of the cargo box and lifts the cargo box, the telescopic cylinder 6 drives the limiting member 5 to extend from the surface of the pallet 31 and limit it on the front and rear sides of the cargo box, which can effectively reduce the situation that the cargo box shakes due to inertia during the telescopic process of the telescopic arm and even falls off the pallet 31, and can effectively improve the stability of the goods picking action of the telescopic fork.
[0053] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.
Claims
1. A telescopic fork for a stacker, mounted on a stacker, characterized in that: It comprises a base (1), a first telescopic arm (2) is slidably connected inside the base (1), and a second telescopic arm (3) is slidably connected outside the first telescopic arm (2); A servo motor (4) is fixedly connected to the base (1), a driving shaft of the servo motor (4) is fixedly connected to a main driving gear (41), a first transmission gear set (11) is rotatably mounted in the base (1), the main driving gear (41) is meshed with the first transmission gear set (11), and a first rack (21) is fixedly connected to the bottom of the first telescopic arm (2), the first rack (21) is meshed with the first transmission gear set (11); The base (1) is fixedly connected to a second rack (12), the first telescopic arm (2) is fixedly connected to a second transmission gear set (22), and the bottom end of the second transmission gear set (22) is meshed with the second rack (12); The top of the second telescopic arm (3) is fixedly connected to a support plate (31), the bottom of the support plate (31) is fixedly connected to a third rack (32), and the third rack (32) is meshed with the top of the second transmission gear set (22); A plurality of limit members (5) are provided on the support plate (31) for lifting, a telescopic cylinder (6) is fixedly connected to the side wall of the second telescopic arm (3), and a driving end of the telescopic cylinder (6) is fixedly connected to the limit member (5).
2. A telescopic fork for a stacker according to claim 1, characterized in that: The limiting member (5) comprises a connecting plate (51), the bottom of the connecting plate (51) is fixedly connected to the cylinder shaft of the telescopic cylinder (6), and the top of the connecting plate (51) is fixedly connected to the limiting plate (52); The support plate (31) is provided with a sliding hole (311) for the limiting plate (52) to pass through, and the limiting plate (52) is slidably arranged in the sliding hole (311).
3. The telescopic fork for a stacker according to claim 2, characterized in that: Also includes: A thin film pressure sensor (7) is fixedly mounted on the surface of the support plate (31) and is used to detect the contact pressure between the cargo box and the support plate (31) and output a contact pressure signal; A comparator chip, connected to the signal output terminal of the thin film pressure sensor (7), for receiving the contact pressure signal and outputting a high level signal when the contact pressure is greater than a set value, and outputting a low level signal when the contact pressure is less than the set value; The signal input ends of the plurality of telescopic cylinders (6) are signal-connected to the signal output ends of the comparator chip; the telescopic cylinders (6) receive the high-level signal and drive the limit plate (52) to extend out of the sliding hole (311); and the telescopic cylinders (6) receive the low-level signal and drive the limit plate (52) to extend into the sliding hole (311).
4. The telescopic fork for a stacker according to claim 1, characterized in that: A first roller group (23) and a second roller group (24) are rotatably connected on both sides of the first telescopic arm (2), and the second roller group (24) is located above the first roller group (23); First slide grooves (13) are respectively formed on both sides of the cavity of the base (1), the first roller group (23) is located in the first slide groove (13), and the two sides of the first roller group (23) are in contact with the upper and lower groove walls of the first slide groove (13); Second slide grooves (33) are respectively formed on both sides of the cavity of the second telescopic arm (3); the second roller group (24) is located in the second slide groove (33), and both sides of the second roller group (24) are in contact with upper and lower groove walls of the second slide groove (33).