Flexible clamp device for clamping forklift cargo blocking frame
The design of the flexible clamping device solves the problem of poor adaptability of welding clamps for forklift racks, achieving efficient, space-saving clamping and convenient maintenance.
Patent Information
- Application Number
- CN202422368437.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-09-27
AI Technical Summary
Most existing welding fixtures for forklift racks are single, fixed tooling, which cannot adapt to a variety of different product specifications, resulting in low equipment utilization, large footprint, and high maintenance costs.
Design a flexible clamping device, including a positioner, a mounting plate, multiple height adjustment devices and a clamping device, to achieve precise positioning and clamping of forklift racks of different sizes through guide rail adjustment and cylinder drive.
It enables efficient clamping and fixing of forklift racks of different specifications and sizes, reduces floor space, improves operating efficiency and simplifies maintenance.
Smart Images
Figure CN223531728U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of welding production equipment, specifically relating to a flexible clamping device for clamping forklift racks. Background Technology
[0002] Gas metal arc welding (GMAW) is widely used in aerospace, high-speed rail, automotive, steel structure, and military industries, forming the foundation of manufacturing. Its main advantages include ease of welding in various positions, high welding speed, and high deposition rate. This gas-shielded welding method is suitable for most major metals, including carbon steel and alloy steel. Gas metal arc welding (GMAW) is suitable for stainless steel, aluminum, magnesium, copper, iron, titanium, zirconium, and nickel alloys. Furthermore, because this welding method can also be used for arc spot welding, it is adopted as the welding method for the entire production line.
[0003] In the production process of forklift racks, high-speed processing and high bending resistance are required to ensure load-bearing capacity meets safety standards under various environmental and driving conditions. Full welding is the most crucial step in forklift rack production. Its core lies in deepening the welding of the entire rack after spot welding. Therefore, the accuracy and stability of the tooling fixtures directly determine the overall quality of the rack. Currently, most forklift rack welding fixtures are single, fixed tooling. When dealing with various product specifications, multiple welding stations must be designed to meet different welding requirements. This results in extremely low average utilization of each station, a large required work area, low economic efficiency, and high maintenance costs. Utility Model Content
[0004] The present invention aims to solve the technical problems existing in the prior art and provide a flexible clamping device for clamping forklift racks.
[0005] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a flexible clamping device for clamping forklift racks, including a positioner, a mounting plate fixed on the positioner, a plurality of height adjustment devices fixed on the mounting plate, and clamping device one, clamping device two and clamping device three respectively on the plurality of height adjustment devices, the clamping device one and clamping device three being located on both sides of clamping device two.
[0006] Preferably, the height adjustment device on the mounting plate is located on the guide rail of the clamping device two, and the clamping device two is slidably mounted on the guide rail.
[0007] Preferably, the clamping device two includes a sliding plate, a first extension member, a first clamping member, a positioning post, a second extension member, and a control valve. The sliding plate is slidably mounted on the guide rail. The first extension member and the positioning post are respectively mounted on both ends of the sliding plate. A first clamping member is provided on both ends of the sliding plate, adjacent to the first extension member and the positioning post, respectively. One set of first clamping members is fixed on the first extension member. A drive cylinder for driving another set of first clamping members is fixed on the sliding plate. The control valve is fixedly mounted on the sliding plate. The first extension member, the first clamping member, the positioning post, and the second extension member are all electrically connected to the control valve.
[0008] Preferably, there are two sets of clamping devices, which are symmetrically arranged at both ends of the mounting plate.
[0009] Preferably, the number of clamping devices one is two sets, and the two sets of clamping devices one are installed side by side on one side of the mounting plate and are both located between the two sets of clamping devices two.
[0010] Preferably, the clamping device three is mounted on the mounting plate and is opposite to the two sets of clamping devices one. The clamping device three includes a moving plate, a driving cylinder, a control valve, and a third clamping member. A guide rail is fixedly mounted on the height adjustment device located at the clamping device three on the mounting plate. The moving plate is slidably mounted on the guide rail. The driving cylinder is fixed on the height adjustment device near the edge of the mounting plate, and its output end is fixedly connected to one end of the moving plate. The control valve is fixed on the moving plate. The two ends of the moving plate near the center of the mounting plate are symmetrically fixed with third clamping members. The driving cylinder and the two sets of third clamping members are all electrically connected to the control valve.
[0011] Preferably, the positioner includes a mounting frame, an active rotating shaft, a passive rotating shaft, a drive motor, and an active shaft reducer. The active rotating shaft and the passive rotating shaft are respectively mounted at both ends of the mounting frame. The mounting plate is fixed between the active rotating shaft and the passive rotating shaft. The drive motor and the active shaft reducer are both fixed at the same end of the mounting frame. The output shaft of the drive motor is fixedly connected to the input end of the active shaft reducer, and the output end of the active shaft reducer is fixedly connected to the active rotating shaft.
[0012] The beneficial effects of this utility model are:
[0013] Compared with the prior art, this utility model symmetrically sets clamping devices two at both ends of the mounting plate, and sets clamping devices one and three on both sides of the mounting plate respectively. Both clamping devices two and three can be adjusted in position by guide rails, so that the flexible clamping device described in this utility model can clamp and fix forklift racks of different specifications and sizes. It has the advantages of small footprint, high operating efficiency and simple and convenient maintenance. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of clamping device one, clamping device two, and clamping device three on the mounting plate of this utility model;
[0015] Figure 2 This is a schematic diagram of the structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the clamping device one;
[0017] Figure 4 This is a schematic diagram of the working process of the shelf with guardrail of this utility model;
[0018] Figure 5 This is a schematic diagram of the working process of the utility model with a top frame.
[0019] In the diagram: 1. Positioner; 2. Mounting plate; 3. Height adjustment device; 4. Clamping device one; 5. Clamping device two; 6. Clamping device three; 7. Guide rail; 8. Sliding plate; 9. First lifting member; 10. First clamping member; 11. Positioning column; 12. Second lifting member; 13. Control valve; 14. Moving plate; 15. Drive cylinder; 16. Third clamping member; 17. Mounting bracket; 18. Active rotating shaft; 19. Passive rotating shaft; 20. Drive motor; 21. Active shaft reducer. Detailed Implementation
[0020] The following examples, in conjunction with the appendix, illustrate the concepts. Figures 1-5 As shown in the structure, the technical solution of this utility model will be further described in detail. In the following embodiments, the top, waist and bottom of the forklift rack are the positions when the rack is installed on the forklift.
[0021] Example: A flexible clamping device for clamping forklift racks includes a positioner 1, a mounting plate 2 fixed on the positioner 1, and height adjustment devices 3 fixed on the four edges of the mounting plate 2. Two height adjustment devices 3 located on the two short edges of the mounting plate 2 are symmetrically equipped with clamping devices 5. Two height adjustment devices 3 located on the two long edges of the mounting plate 2 are respectively equipped with clamping devices 4 and 6. There are two sets of clamping devices 4, arranged side-by-side between the two sets of clamping devices 5. The clamping devices 6 are also located between the two sets of clamping devices 5.
[0022] Specifically, the positioner 1 includes a mounting frame 17, an active rotating shaft 18, a passive rotating shaft 19, a drive motor 20, and an active shaft reducer 21. The active rotating shaft 18 and the passive rotating shaft 19 are respectively installed at both ends of the mounting frame 17. The mounting plate 2 is fixed between the active rotating shaft 18 and the passive rotating shaft 19. The drive motor 20 and the active shaft reducer 21 are both fixed on the mounting frame 17 at the end where the active rotating shaft 18 is installed. The output shaft of the drive motor 20 is fixedly connected to the input end of the active shaft reducer 21, and the output end of the active shaft reducer 21 is fixedly connected to the active rotating shaft 18. In use, the drive motor 20 rotates and, after being reduced by the active shaft reducer 21, drives the active rotating shaft 18 to rotate, which in turn drives the passive rotating shaft 19 to rotate, thereby achieving the purpose of rotating the mounting plate 2.
[0023] The two clamping devices 4 have the same structure, both being cylinder-driven grippers. In use, the cylinder extends to increase the distance between the grippers, and the top of the forklift rack to be welded is placed between the grippers. The cylinder retracts to clamp and fix the rack. Clamping device 4 adopts a positive tensioning scheme, that is, when there is no signal from the cylinder, it is in a retracted and locked state, thus ensuring that a sudden air circuit failure during operation will not affect the clamping state of clamping device 4 on the rack.
[0024] The two sets of clamping devices 5 have the same structure. The height adjustment devices 3 located at the two sets of clamping devices 5 on the mounting plate 2 are all fixed with guide rails 7. The clamping device 5 includes a sliding plate 8, a first extension member 9, a first tightening member 10, a positioning post 11, a second extension member 12 and a control valve 13. The first extension member 9 and the positioning post 11 are respectively installed at both ends of the sliding plate 8. The two ends of the sliding plate 8 are provided with first tightening members 10 respectively at the first extension member 9 and the positioning post. One set of first tightening members 10 is fixed on the first extension member 9. A drive cylinder 15 for driving another set of first tightening members 10 is fixed on the sliding plate 8. The control valve 13 is fixedly installed on the sliding plate 8. The first extension member 9, the first tightening member 10, the positioning post 11 and the second extension member 12 are all electrically connected to the control valve 13.
[0025] The first extension member 9 is driven by a cylinder to a rectangular strip with an L-shaped plate fixed at one end. The first clamping member 10, which is fixed to the first extension member 9, is fixed to the rectangular strip. The first clamping member 10 consists of a cylinder and a top block fixed to the extended end of the cylinder. The first extension member 9 adopts a forward tensioning scheme, that is, it is in a retracted and locked state when the cylinder has no signal. The cylinder of the first clamping member 10 adopts a reverse tensioning scheme, that is, it is in an extended state when the cylinder has no signal. This ensures that a sudden air circuit failure during operation will not affect the clamping state of the first clamping member 10 against the shelf.
[0026] The positioning post 11 is driven by a cylinder. The cylinder driving the positioning post 11 adopts a reverse tensioning scheme, that is, the cylinder is in the extended state when there is no signal. The retaining shelf has a reserved hole for positioning. When in use, the positioning post 11 is driven by the cylinder to extend into the reserved hole on the retaining shelf. The first positioning component adjacent to the positioning post 11 is driven by a drive cylinder 15. This drive cylinder 15 adopts a reverse tensioning scheme, that is, the cylinder is in the extended state when there is no signal, thereby ensuring that the first clamping component 10 will not be affected by the air circuit in the event of a sudden air circuit failure. The fault retraction causes displacement. The second extension member 12 is driven by a cylinder. The second extension member 12 has the same function as the positioning column 11. When in use, the second extension member 12 extends into another reserved hole of the barrier shelf. The cylinder of the second extension member 12 adopts a positive tensioning scheme. When the barrier shelf is placed, the cylinder of the second extension member 12 extends to make the positioning pin at the end of the second extension member 12 move away from the barrier shelf. When the barrier shelf is placed and positioned and fixed, the cylinder retracts and the positioning pin inserts into the reserved hole on the barrier shelf.
[0027] Clamping device 36 includes a movable plate 14, a drive cylinder 15, a control valve 13, and a third clamping member 16. A guide rail 7 is fixedly mounted on the height adjustment device 3 located at the clamping device 36 on the mounting plate 2. The movable plate 14 is slidably mounted on the guide rail 7. The drive cylinder 15 is fixed to the height adjustment device 3 near the edge of the mounting plate 2, and its output end is fixedly connected to one end of the sliding plate 8. The control valve 13 is fixed to the movable plate 14. The third clamping member 16 is symmetrically fixed at both ends on one side of the movable plate 14 near the center of the mounting plate 2. The drive cylinder 15 and... Both sets of third clamping members 16 are electrically connected to the control valve 13. The third clamping member 16 has the same structure as the first clamping member 10, which is a fixed top block on the output end of the cylinder. The difference between the third clamping member 16 and the first clamping member 10 is that the cylinder of the third clamping member 16 is tilted at a certain angle. The third clamping member 16 is used to clamp and fix the bottom of the barrier shelf. The cylinder of the third clamping member 16 and the drive cylinder 15 of the clamping device 36 both adopt a reverse tensioning scheme, that is, the cylinder remains in the extended state when there is no signal, to ensure the clamping device 36 clamps and fixes the barrier shelf.
[0028] The working principle of this utility model:
[0029] In use, the handling robot, controlled by the PLC, moves the spot-welded retainer rack onto the mounting plate 2. After placement, it sends a signal to the PLC indicating that the rack has been placed and sends a signal to the PLC. Then, the PLC sends a work start signal. After all the cylinders on the mounting plate 2 have fully actuated, the drive motor 20 rotates, driving the drive shaft reducer 21 to rotate the drive rotation shaft 18 and the passive rotation shaft 19 to flip the mounting plate 2 to adapt to the working position of the welding robot.
[0030] After the barrier rack is placed into the clamping device, upon receiving the start signal corresponding to the model from the PLC, the cylinder of clamping device 4 retracts, tightening the grippers to clamp and fix the top of the barrier rack. Then, clamping device 5 clamps both sides of the barrier rack. The cylinders of the two sets of first extension members 9 retract, causing the two L-shaped plates to stretch the barrier rack to both sides, completing the clamping of both sides of the barrier rack. The two sets of first pressing members 10 located on the two sets of first extension members 9 use cylinders to drive the top blocks to press and fix the sides of the barrier rack. Then, by driving the second extension member 12 and the positioning column 11, the second extension member 12 and the positioning column 11 are clamped and fixed. 1. Insert the clamps into the pre-drilled holes on the retaining rack for positioning and fixation. Then, transmit the signal to the PLC through the control valve 13 on the clamping device 2 5. After receiving the signal, the PLC performs the final clamping. The first clamping member 10 and the third clamping member 16 clamp the sides and bottom of the retaining rack. Finally, transmit the clamping signal to the PLC through the control valve 13 on the clamping device 2 5 and the clamping device 3 6 respectively. After receiving the clamping signal, the PLC transmits the working command to the drive motor 20. The drive motor 20 enters the working state and rotates to drive the mounting plate 2 to flip to adapt to the working position of the welding robot.
[0031] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.
Claims
1. A flexible clamping device for clamping forklift racks, characterized in that: The device includes a positioner (1), on which a mounting plate (2) is fixed. Multiple height adjustment devices (3) are fixed on the mounting plate (2). Each of the multiple height adjustment devices (3) is provided with a clamping device one (4), a clamping device two (5), and a clamping device three (6). The clamping device one (4) and the clamping device three (6) are located on both sides of the clamping device two (5).
2. The flexible clamping device for clamping forklift racks according to claim 1, characterized in that: The height adjustment device (3) on the mounting plate (2) and located at the clamping device two (5) has a guide rail (7), and the clamping device two (5) is slidably mounted on the guide rail (7).
3. A flexible clamping device for clamping forklift racks according to claim 2, characterized in that: The clamping device 2 (5) includes a sliding plate (8), a first extension member (9), a first clamping member (10), a positioning post (11), a second extension member (12), and a control valve (13). The sliding plate (8) is slidably mounted on the guide rail (7). The first extension member (9) and the positioning post (11) are respectively mounted on both ends of the sliding plate (8). The sliding plate (8) is provided with a first clamping member (10) at both ends and adjacent to the first extension member (9) and the positioning post. One set of first clamping members (10) is fixed on the first extension member (9). A drive cylinder (15) for driving another set of first clamping members (10) is fixed on the sliding plate (8). The control valve (13) is fixedly mounted on the sliding plate (8). The first extension member (9), the first clamping member (10), the positioning post (11), and the second extension member (12) are all electrically connected to the control valve (13).
4. A flexible clamping device for clamping forklift racks according to claim 3, characterized in that: The number of clamping devices (5) is 2 sets, and the 2 sets of clamping devices (5) are symmetrically arranged at both ends of the mounting plate (2).
5. A flexible clamping device for clamping forklift racks according to claim 4, characterized in that: The number of clamping devices one (4) is two sets. The two sets of clamping devices one (4) are installed side by side on one side of the mounting plate (2) and are both located between the two sets of clamping devices two (5).
6. A flexible clamping device for clamping forklift racks according to claim 5, characterized in that: The clamping device three (6) is mounted on the mounting plate (2) and is opposite to the two sets of clamping devices one (4). The clamping device three (6) includes a moving plate (14), a driving cylinder (15), a control valve (13) and a third clamping member (16). A guide rail (7) is fixedly mounted on the height adjustment device (3) located at the clamping device three (6) on the mounting plate (2). The moving plate (14) is slidably mounted on the guide rail (7). The driving cylinder (15) is fixed on the height adjustment device (3) near the edge of the mounting plate (2) and its output end is fixedly connected to one end of the sliding plate (8). The control valve (13) is fixed on the moving plate (14). The moving plate (14) is symmetrically fixed at both ends on one side near the center of the mounting plate (2). The driving cylinder (15) and the two sets of third clamping members (16) are electrically connected to the control valve (13).
7. A flexible clamping device for clamping forklift racks according to claim 1, characterized in that: The positioner (1) includes a mounting frame (17), an active rotating shaft (18), a passive rotating shaft (19), a drive motor (20), and an active shaft reducer (21). The active rotating shaft (18) and the passive rotating shaft (19) are respectively mounted at both ends of the mounting frame (17). The mounting plate (2) is fixed between the active rotating shaft (18) and the passive rotating shaft (19). The drive motor (20) and the active shaft reducer (21) are both fixed at the same end of the mounting frame (17). The output shaft of the drive motor (20) is fixedly connected to the input end of the active shaft reducer (21), and the output end of the active shaft reducer (21) is fixedly connected to the active rotating shaft (18).