A device for detecting the root of a forkless truck
By combining a mechanical structure with an inductive proximity switch, the unmanned forklift tooth root arrival detection device solves the problem of unstable sensing signals in low temperature and high humidity environments, achieving stable sensing performance and efficient detection results, while reducing maintenance difficulty and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN YUESHI COLD CHAIN ROBOT CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-06-23
AI Technical Summary
Existing unmanned forklift tooth root arrival detection devices are susceptible to fog and condensation in low-temperature and high-humidity environments, resulting in unstable sensing signals and frequent misjudgments. Furthermore, photoelectric sensors are complex to install and have high maintenance costs, making it difficult to meet the requirements for efficient and stable operation.
The design combines mechanical structure with inductive proximity switch, including tooth root sensing component, fixed bracket, sensing plate, proximity switch, rotating shaft and torsion spring, etc. Through bolt connection and thread adjustment, the sensing distance and angle can be precisely adjusted, avoiding environmental interference and improving detection stability and reliability.
Maintaining stable sensing performance in low-temperature and high-humidity environments reduces the risk of misjudgment, lowers maintenance costs, extends service life, improves detection accuracy and operational efficiency, and enhances the structural stability and environmental adaptability of the device.
Smart Images
Figure CN224394529U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of intelligent logistics equipment technology, specifically to an unmanned forklift tooth root arrival detection device. Background Technology
[0002] In modern intelligent warehousing and logistics systems, unmanned forklifts, as automated handling equipment, directly impact the efficiency and safety of logistics operations with their operational accuracy. Detecting goods reaching the base of the forklift's forks is a crucial step in the unmanned forklift's operation process, and current technologies mostly employ photoelectric sensors for this purpose. However, in low-temperature, high-humidity environments such as cold storage facilities, photoelectric sensors are susceptible to fog and condensation, leading to unstable sensing signals and frequent misjudgments. Furthermore, photoelectric sensors are complex to install and debug, have poor environmental adaptability, and a short lifespan, increasing equipment maintenance costs and the risk of operational interruptions, making it difficult to meet the demands of efficient and stable unmanned forklift operation. Utility Model Content
[0003] To address the shortcomings of existing technologies, this utility model provides an unmanned forklift tooth root arrival detection device. Through a design that combines mechanical structure with inductive proximity switch, it improves the stability and reliability of goods arrival detection, enhances adaptability to low-temperature environments, and reduces maintenance costs.
[0004] To solve the above-mentioned technical problems, this application adopts the following technical solution:
[0005] This application provides a forklift tooth root arrival detection device, including an unmanned forklift, characterized in that: the unmanned forklift is provided with forks at its bottom, and a tooth root sensing component is installed at the root of the forks; the tooth root sensing component is embedded in the internal groove area of the forks, and the tooth root sensing component rises and falls synchronously with the forks; the tooth root sensing component includes a sensing plate, a proximity switch, a fixed bracket, a sensing bolt, a rotating shaft, a torsion spring, and a bolt; the fixed bracket is rigidly connected to the forks by the bolts; the proximity switch is fastened to the fixed bracket by a nut; the sensing plate is hinged to the fixed bracket by the rotating shaft and the torsion spring, and the sensing plate can rotate relative to the connection point with the fixed bracket; the two ends of the torsion spring respectively abut against the sensing plate and the fixed bracket; the sensing bolt is threadedly connected to the sensing plate, and the distance between the sensing bolt and the proximity switch can be adjusted by the thread.
[0006] Furthermore, the fixing bracket has standardized holes that are compatible with the bolts.
[0007] Furthermore, the sensing distance between the sensing bolt and the proximity switch is adjustable within the range of [0mm, 5mm].
[0008] Furthermore, the sensing plate adopts a long strip structure.
[0009] Furthermore, the rotating shaft is detachably connected to the fixed bracket, and the axial direction of the rotating shaft is perpendicular to the length direction of the fork.
[0010] Furthermore, the proximity switch is an inductive proximity switch, and the maximum sensing distance parameter of the proximity switch is 5mm.
[0011] Furthermore, the rotation angle range of the sensing plate is [0°, 10°].
[0012] Furthermore, a wear-resistant washer is fixed to the end of the sensing bolt.
[0013] Furthermore, the wear-resistant pad and the proximity switch are arranged face-to-face.
[0014] Compared with the prior art, this application has the following beneficial effects:
[0015] Enhanced structural stability. The fixed bracket is rigidly connected to the forks with bolts, ensuring that the tooth root sensing component does not loosen or shift during fork lifting and cargo handling, providing a structural foundation for detection accuracy; the sensing plate is hinged to the fixed bracket via a rotating shaft, and with the elastic constraint of a torsion spring, the sensing plate remains stable in its normal position, avoiding detection reference shift caused by vibration and other factors.
[0016] Improved environmental adaptability. By replacing traditional photoelectric sensors with inductive proximity switches, the sensors are unaffected by environmental factors such as fog and condensation. They maintain stable sensing performance even in low-temperature and high-humidity environments such as cold storage facilities, significantly reducing the risk of misjudgment caused by environmental interference.
[0017] Optimized adjustment precision. The sensing distance between the sensing bolt and the proximity switch can be precisely adjusted within the range of [0mm, 5mm] via the thread. Combined with the maximum sensing distance parameter of 5mm for the proximity switch, the sensing threshold can be accurately set according to different cargo sizes and detection requirements, meeting the detection accuracy requirements of diverse operating scenarios.
[0018] Improved ease of maintenance. The rotating shaft and fixed bracket are detachably connected, allowing for quick disassembly and replacement when components wear out or malfunction, reducing maintenance difficulty and time costs; the fixed bracket has standardized holes to accommodate the installation interfaces of different fork models, improving the device's versatility and installation efficiency.
[0019] Extended service life. The wear-resistant gasket at the end of the sensing bolt is positioned face-to-face with the proximity switch to avoid direct contact and wear between the sensing bolt and the proximity switch, reducing component wear; the elongated sensing plate, with a rotation angle range of [0°, 10°], reduces stress concentration when in contact with goods, reducing mechanical damage to the sensing plate.
[0020] Improved space utilization. The tooth root sensing component is embedded in the groove area inside the fork, without occupying the external loading space of the fork or changing the structural stress characteristics of the fork, ensuring that the load-bearing capacity of the fork is not affected, and achieving an optimized balance between functional integration and space utilization. Attached Figure Description
[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:
[0022] Figure 1 is a schematic diagram of the overall structure of an embodiment of this application;
[0023] Figure 2 is an exploded view of the tooth root sensing component structure according to an embodiment of this application. Figure 1 ;
[0024] Figure 3 This is an exploded view of the tooth root sensing component structure in an embodiment of this application. Figure 2 ;
[0025] The markings in the diagram are as follows: 1 - unmanned forklift, 2 - forks, 3 - tooth root sensor assembly, 4 - sensor plate, 5 - proximity switch, 6 - fixed bracket, 7 - sensor bolt, 8 - rotating shaft, 9 - torsion spring, 10 - bolt. Detailed Implementation
[0026] To enable those skilled in the art to better understand the technical solutions in the embodiments of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the protection scope of the embodiments of this application.
[0027] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the embodiments of this application. However, the embodiments of this application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the embodiments of this application is not limited to the specific implementation methods disclosed below.
[0028] In the description of the embodiments of this application, it should be understood that the terms "upper", "lower", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0029] The present invention will now be described in further detail with reference to the accompanying drawings.
[0030] refer to Figure 1 The forks 2 at the bottom of the unmanned forklift 1 are used to carry goods. A tooth root sensor component 3 is embedded in the internal groove area at the root of the fork 2. This tooth root sensor component rises and falls synchronously with the fork 2. This embedded design ensures that the tooth root sensor component 3 does not occupy the external loading space of the fork 2, avoiding any alteration to the original structural stress characteristics of the fork 2 and guaranteeing that the load-bearing capacity of the fork 2 remains unaffected. Simultaneously, it can detect the position of the goods in real time throughout the entire lifting stroke, achieving an effective combination of space utilization and detection function.
[0031] refer to Figure 2 and Figure 3 The assembly relationship and technical effects of each step of the tooth root sensing component 3 are as follows: The fixed bracket 6 is fastened to the root of the fork 2 by bolts 10, and the standardized holes on the fixed bracket 6 are precisely matched with the bolts 10. The standardized hole design ensures that the bolts 10 can be accurately aligned during installation, making the connection between the fixed bracket 6 and the fork 2 more secure and reliable, avoiding loosening of the fixed bracket 6 due to installation deviation, providing a stable installation foundation for the entire tooth root sensing component 3, reducing structural displacement caused by vibration and other factors during cargo handling, and ensuring the stability of subsequent detection.
[0032] refer to Figure 2 and Figure 3 The proximity switch 5 is secured to the preset position of the fixed bracket 6 by a nut. The proximity switch is an inductive proximity switch with a maximum sensing distance of 5mm. The inductive proximity switch itself has strong resistance to environmental interference and is not affected by factors such as fog or condensation. Secured to the preset position by the nut, it ensures the accuracy and stability of its installation position, ensuring that its relative position with the sensing bolt 7 will not change due to vibration or other reasons during long-term use, thereby maintaining stable sensing performance, reducing the interference of environmental factors on the detection signal, and improving the reliability of detection.
[0033] refer to Figure 2 and Figure 3The sensing plate 4 adopts a long strip structure and is hinged to the fixed bracket 6 via a rotating shaft 8. The axis of the rotating shaft 8 is perpendicular to the length direction of the fork 2 and is detachably connected. The long strip structure of the sensing plate 4 increases the contact area with the goods, enabling it to receive the force transmitted by the goods more stably and reducing sensing failures caused by deviations in the contact point of the goods. The design of the rotating shaft 8 being perpendicular to the length direction of the fork 2 ensures that the rotation direction of the sensing plate 4 matches the direction of the goods near the root of the fork, guaranteeing that the sensing plate 4 can rotate smoothly when touched by the goods. The detachable connection method facilitates quick disassembly and replacement when the rotating shaft 8 wears or malfunctions, reducing maintenance difficulty and time costs, and improving the maintenance efficiency of the equipment.
[0034] refer to Figure 2 and Figure 3 The torsion spring 9 abuts against the sensing plate 4 and the fixed bracket 6 at both ends, providing elastic support for the sensing plate 4 and keeping it in its initial open position under normal conditions. The elastic support of the torsion spring 9 ensures that the sensing plate 4 remains stably in its initial position when not touched by goods, providing a consistent reference state for detection and preventing positional shifts due to its own weight or slight vibrations. This ensures consistency of initial conditions for each detection, thereby improving detection accuracy. When the goods are removed, the torsion spring 9 quickly resets the sensing plate 4, allowing the device to rapidly return to the detection state, improving the continuity and efficiency of detection.
[0035] refer to Figure 2 and Figure 3 The sensing bolt 7 is threadedly connected to the sensing plate 4, and the wear-resistant pad at its end is positioned face-to-face with the proximity switch 5. By rotating the sensing bolt 7, the distance between them can be adjusted to a suitable range of [0mm, 5mm]. The threaded connection makes the position adjustment of the sensing bolt 7 more precise and convenient, allowing for accurate setting of the sensing distance with the proximity switch 5 according to the size of different goods and detection requirements, meeting the needs of diverse operating scenarios. The wear-resistant pad avoids direct contact wear between the end of the sensing bolt 7 and the proximity switch 5, reducing wear and tear on components during long-term use and extending the service life of both the sensing bolt 7 and the proximity switch 5. The face-to-face arrangement of the wear-resistant pad and the proximity switch 5 ensures stable transmission of the sensing signal, ensuring that the proximity switch 5 can accurately sense changes in the position of the sensing bolt 7.
[0036] When the goods contact the sensing plate 4, the sensing plate 4 rotates around the rotation axis 8 within the range of [0°, 10°], causing the sensing bolt 7 to move. When the wear-resistant pad moves out of the 5mm sensing range of the proximity switch 5, the proximity switch 5 sends a signal indicating that the goods have arrived. The rotation angle range of [0°, 10°] ensures that the sensing plate 4 has sufficient rotational stroke to allow the sensing bolt 7 to move out of the sensing range of the proximity switch 5, ensuring effective changes in the detection signal. It also avoids excessive rotation of the sensing plate 4 and interference with other components, protecting the integrity of the device structure. The proximity switch 5 sends a signal in a timely manner when the wear-resistant pad moves out of the sensing range, realizing accurate judgment of the goods' arrival status and providing accurate control basis for the subsequent operation of the unmanned forklift.
[0037] After the goods are unloaded, the sensor plate 4 resets under the elastic force of the torsion spring 9, and the wear-resistant pad re-enters the sensing range, completing one detection cycle. The elastic reset function of the torsion spring 9 allows the sensor plate 4 to quickly and accurately return to its initial position, ensuring that the reference state for the next detection is consistent, guaranteeing the continuity and stability of the detection process, and improving the operating efficiency of the unmanned forklift.
[0038] Compared with the prior art, the specific embodiments of this utility model achieve the following multiple technical effects:
[0039] The embedded tooth root sensor layout achieves integrated detection of cargo lifting and lowering without occupying external cargo space or altering the fork's structural stress characteristics. This ensures the fork's load-bearing capacity while improving space utilization. The standardized hole design of the fixed bracket, combined with the bolt fastening structure, ensures precise alignment and connection stability of the components, effectively avoiding structural displacement caused by vibration and laying a structural foundation for detection accuracy.
[0040] The selection of inductive proximity switches and the nut tightening installation method significantly enhance environmental adaptability, completely solve the problem of interference from fog and condensation in traditional photoelectric sensors, and ensure consistent sensing performance over long-term use through stable positioning, greatly reducing the risk of misjudgment caused by environmental interference.
[0041] The elongated sensor plate, combined with a detachable rotating shaft with a vertical axis, not only increases the contact area with the cargo to reduce sensor failure, but also improves the smoothness of operation by adapting to the rotational characteristics of the cargo's movement direction. The detachable structure further reduces the difficulty and time cost of component maintenance. The elastic support mechanism of the torsion spring provides the sensor plate with a stable reference position and rapid reset capability, ensuring consistent initial detection conditions while improving operational continuity.
[0042] The threaded adjustment structure of the sensing bolt and the design of the wear-resistant shims enable precise control of the sensing distance [0mm, 5mm], meeting the diverse detection needs of various scenarios. The face-to-face placement of the wear-resistant shims effectively reduces component contact wear and extends the service life of the core components. The rotation angle range design of the sensing plate [0°, 10°] ensures effective changes in the sensing signal while avoiding component interference, further enhancing the safety and reliability of the device operation.
[0043] In summary, through the optimized design and synergistic effect of each component, this utility model has achieved significant improvements in structural stability, environmental adaptability, adjustment precision, maintenance convenience, and service life, effectively ensuring the high efficiency and accuracy of unmanned forklift tooth root arrival inspection in special environments such as cold storage.
[0044] The above specific embodiments further illustrate the technical problems to be solved by this application, the technical solutions provided, and the beneficial effects achieved. It should be understood that the above are only specific embodiments of this utility model and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solutions of this application should be included within the scope of protection of this application.
Claims
1. A forklift tooth root arrival detection device, comprising an unmanned forklift (1), characterized in that: The unmanned forklift (1) is equipped with forks (2) at the bottom, and a root sensor component (3) is installed at the root of the forks (2); the root sensor component (3) is embedded in the groove area inside the forks (2), and the root sensor component (3) rises and falls synchronously with the forks (2); the root sensor component (3) includes a sensor plate (4), a proximity switch (5), a fixed bracket (6), a sensing bolt (7), a rotating shaft (8), a torsion spring (9), and a bolt (10); the fixed bracket (6) is connected to the forks (2) by the bolt (10). The proximity switch (5) is rigidly connected to the fixed bracket (6) by a nut; the sensing plate (4) is hinged to the fixed bracket (6) through the rotating shaft (8) and the torsion spring (9), and the sensing plate (4) can rotate relative to the connection point with the fixed bracket (6); the two ends of the torsion spring (9) abut against the sensing plate (4) and the fixed bracket (6) respectively; the sensing bolt (7) is threaded to the sensing plate (4), and the distance between the sensing bolt (7) and the proximity switch (5) can be adjusted by the thread.
2. The unmanned forklift tooth root arrival detection device according to claim 1, characterized in that: The fixed bracket (6) has standardized holes that are compatible with the bolt (10).
3. The unmanned forklift tooth root arrival detection device according to claim 1, characterized in that: The sensing distance adjustment range between the sensing bolt (7) and the proximity switch (5) is [0mm, 5mm].
4. The unmanned forklift tooth root arrival detection device according to claim 1, characterized in that: The induction plate (4) adopts a long strip structure.
5. The unmanned forklift tooth root arrival detection device according to claim 1, characterized in that: The rotating shaft (8) is detachably connected to the fixed bracket (6), and the axial direction of the rotating shaft (8) is perpendicular to the length direction of the fork (2).
6. The unmanned forklift tooth root arrival detection device according to claim 1, characterized in that: The proximity switch (5) is an inductive proximity switch, and the maximum sensing distance parameter of the proximity switch (5) is 5mm.
7. The unmanned forklift tooth root arrival detection device according to claim 1, characterized in that: The rotation angle range of the sensing plate (4) is [0°, 10°].
8. The unmanned forklift tooth root arrival detection device according to claim 1, characterized in that: The end of the sensing bolt (7) is fixed with a wear-resistant washer.
9. The unmanned forklift tooth root arrival detection device according to claim 8, characterized in that: The wear-resistant pad and the proximity switch (5) are positioned face to face.