Self-locking hitch
By using a self-locking hook and traction mechanism, and employing a foot-operated lever and impact-locking inner tongue pin, the problems of cumbersome operation, collision risk, and insufficient strength of the hook mechanism for turnover equipment are solved, thus achieving safe and efficient transportation connection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANPI COUNTY YIKANG HARDWARE MANUFACTURING CO LTD
- Filing Date
- 2025-10-15
- Publication Date
- 2026-07-21
AI Technical Summary
The existing hook mechanism for transport equipment requires close-range manual operation, which is cumbersome, poses risks of collision, is prone to damage to transmission components, is susceptible to foreign object intrusion, and has insufficient strength, thus affecting transportation safety and efficiency.
A self-locking hook rear traction mechanism was designed, which enables remote operation by using a foot pedal to drive the lever. Combined with the impact inner tongue fixing pin, pull shaft guard plate and reinforcing ribs, it ensures stable connection and strength, avoids the risk of close-range operation, and prevents foreign objects from entering through the sealing structure.
It achieves a safe and efficient hook connection that does not require close-range manual operation, improving transportation safety and equipment stability, and reducing component damage and maintenance costs.
Smart Images
Figure CN224528363U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of self-locking hook technology, specifically to the rear traction of a self-locking hook. Background Technology
[0002] In the automotive parts and turnover rack transportation sectors, efficient transfer of turnover equipment is a core element in improving logistics efficiency. The market demand for rapid connection, high-speed and stable transportation, and centralized transfer of large quantities of turnover equipment is increasingly urgent. As a key connecting component between the turnover equipment and the transport carrier, the performance of the hook mechanism directly impacts the safety and efficiency of transportation. In existing hook mechanisms for transportable equipment, most hooks require manual activation or deactivation at close range. This not only involves cumbersome procedures and prolonged loading and unloading times, but also poses a risk of collision in high-speed transport scenarios, threatening the safety of operators. Furthermore, some hook transmission components (such as trigger tongues and linkage shafts) lack effective protection and positioning structures, making them prone to deformation of the tongues and misalignment of the shafts during frequent impact triggering or heavy-duty transport, leading to connection failure. Additionally, the force transmission of elastic elements such as springs is unstable, often resulting in delayed rebound or insufficient tension, affecting the self-locking and unlocking response speed of the hooks. Finally, existing structures often fail to consider the intrusion of foreign objects in the transport environment, allowing dust, debris, and other impurities to easily enter the housing, causing the mechanism to jam and malfunction. Moreover, some hooks lack overall strength, making them prone to component damage and frequent replacement in heavy-duty scenarios involving the transport of multiple transportable equipment, increasing maintenance costs and wasting resources.
[0003] To address this issue, we designed a self-locking hook with a rear traction mechanism. Utility Model Content
[0004] The purpose of this invention is to provide a self-locking hook for traction, so as to solve the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, the present invention provides a self-locking hook rear traction device, comprising: an outer shell; an impact inner tongue body provided on the front side of the outer shell; a prying lever body assembled on both sides inside the outer shell; and a tension spring body connected inside the outer shell, with one end of the tension spring body connected to the prying lever body and the other end fixedly connected to the outer shell. When the impact inner tongue body is impacted, the tension spring body rebounds, causing the prying lever body to separate from the impact inner tongue body, thereby driving the inward retraction shaft to rise. When the prying lever body is operated, the tension spring body opens, causing the prying lever body to engage with the impact inner tongue body, thereby driving the inward retraction shaft to descend and achieve locking.
[0006] Furthermore, mounting holes for connecting device holders are provided on both sides of the outer shell, and reinforcing ribs for buffering and protecting the inner tongue body during impact are provided on both sides of the inner tongue body.
[0007] Furthermore, the outer shell has an inner tongue fixing hole and an impact inner tongue fixing pin. The impact inner tongue fixing pin passes through the inner tongue fixing hole and is connected to the impact inner tongue body for fixing the impact inner tongue body.
[0008] Furthermore, the inner retractable pull shaft is provided with pull shaft guard plates on both the upper and lower sides, and the pull shaft guard plates are used to guide and position the inner retractable pull shaft.
[0009] Furthermore, a guide opening is provided on the inner side of the retractable pull shaft, and one end of the agitator lever body is inserted into the guide opening.
[0010] Furthermore, foot pedal mounting holes are provided on both sides of the outer casing, and foot pedal bodies are rotatably connected to the foot pedal mounting holes. A lever fixing hole is provided at the corresponding position of the outer casing and the lever body, and the lever body can rotate around the lever fixing hole.
[0011] Furthermore, it also includes a first decorative cover, a second decorative cover, and a mounting shaft. The first decorative cover and the second decorative cover are fixed to the outer shell by rivetless riveting to form a sealing structure together. The actuating lever body is fixedly connected to the mounting shaft, and the mounting shaft is rotatably connected to the outer shell.
[0012] Furthermore, the outer shell is provided with a first tension spring hole and a reinforcing rib, and the lever body is provided with a second tension spring hole that is adapted to the tension spring body. One end of the tension spring body is connected to the first tension spring hole of the lever body, and the other end is connected to the second tension spring hole of the outer shell.
[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. When locking, the operator can drive the lever to rotate by stepping on the foot pedals on both sides of the outer shell. The lever transmission will lower the inner pull shaft and lock the device, eliminating the need for hand contact with the core mechanism. When unlocking, the linkage will be triggered by an external force hitting the inner tongue from a distance. The spring will rebound and drive the pull shaft to rise to complete the unlocking. This design avoids the collision and squeezing risks that may be faced in close-range operations in high-speed transportation scenarios, thus improving operational safety.
[0014] 2. The impact inner tongue fixing pin can limit the lateral and longitudinal displacement of the impact inner tongue, while the pull shaft guard plate and guide port ensure the stable movement of the inner pull shaft and avoid the failure of lever linkage due to component positioning deviation. The tension spring achieves stable connection through a special tension spring hole and extends and retracts in a preset direction when under force, which, together with the outer shell reinforcing rib, improves the overall structural strength. Attached Figure Description
[0015] Figure 1 This is an exploded view of the present invention; Figure 2 This is a schematic diagram of the structure of the inward-retracting pull shaft of this utility model; Figure 3 This is a schematic diagram of the structure of the inward-retracting pull shaft of this utility model; Figure 4 This is a schematic diagram of the impact inner tongue in this utility model; Figure 5 This is a schematic diagram of the lifting lever in this utility model; Figure 6 This is a schematic diagram of the foot pedal structure in this utility model.
[0016] In the diagram: 1. Outer shell; 2. Impact inner tongue body; 3. Actuating lever body; 4. Tension spring body; 5. Retracting pull shaft; 6. Mounting shaft; 7. Impact inner tongue fixing pin; 8. Guide port; 9. First decorative cover; 10. Foot pedal body; 11. Second decorative cover. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] Please see Figure 1-6 This utility model provides a technical solution: a self-locking hook with rear traction, comprising an outer shell 1, an impact inner tongue body 2 provided on the front side of the outer shell 1, a prying lever body 3 assembled on both sides inside the outer shell 1, and a tension spring body 4 connected inside the outer shell 1, with one end of the tension spring body 4 connected to the prying lever body 3 and the other end fixedly connected to the outer shell 1. When the impact inner tongue body 2 is struck, the tension spring body 4 rebounds, causing the prying lever body 3 to separate from the impact inner tongue body 2, thereby driving the inner retracting pull shaft 5 to rise. When the prying lever body 3 is operated, the tension spring body 4 opens, causing the prying lever body 3 to cooperate with the impact inner tongue body 2, thereby driving the inner retracting pull shaft 5 to fall and achieve locking.
[0019] In practice, the inner tongue body 2 is impacted from a distance, causing it to retract, which triggers the spring body 4 to rebound, thereby pushing the lever body 3 to separate from the impacting inner tongue body 2. The linkage effect of the lever body 3 drives the retracting pull shaft 5 to rise, realizing the hook unlocking or connection preparation. When the lever body 3 is operated, the tension spring body 4 is forced open and stores elastic potential energy. The lever body 3 cooperates with the impact inner tongue body 2, and drives the inner pull shaft 5 to descend through the lever transmission, thus completing the locking and fixing of the turnover tool. This setting does not require the operator to manually contact the mechanism at close range, avoids the collision risk in high-speed transportation scenarios, and improves operational safety.
[0020] See Figure 1-6 The outer shell 1 has mounting holes on both sides for connecting the device frame, and the inner tongue body 2 has reinforcing ribs on both sides for cushioning and protecting the inner tongue body 2 during impact.
[0021] In practice, the mounting holes on both sides of the outer shell 1 are used to fix and connect with turnover equipment racks of different specifications; the reinforcing ribs on both sides of the inner tongue body 2 disperse the impact force during the impact triggering process and reduce the deformation damage of the inner tongue body 2.
[0022] See Figure 1-6 The outer shell 1 has an inner tongue fixing hole and an impact inner tongue fixing pin 7. The impact inner tongue fixing pin 7 passes through the inner tongue fixing hole and is connected to the impact inner tongue body 2 for fixing the impact inner tongue body 2.
[0023] In specific implementation, the impact inner tongue fixing pin 7 inside the outer shell 1 passes through the inner tongue fixing hole and fixes the impact inner tongue body 2 in the preset position of the outer shell 1, limiting the lateral and longitudinal displacement of the impact inner tongue body 2. This setting can ensure that the impact inner tongue body 2 is always in the preset working position during frequent impacts and linkages, avoiding lever linkage failure caused by positioning deviations.
[0024] See Figure 1-6 The inner retractable pull shaft 5 is provided with pull shaft guard plates on both the upper and lower sides. The pull shaft guard plates are used to guide and position the inner retractable pull shaft 5.
[0025] In practice, the pull shaft guard plates on the upper and lower sides of the inward pull shaft 5 form a guide channel. During the up-and-down movement of the inward pull shaft 5, the pull shaft guard plates limit the lateral deviation.
[0026] See Figure 1-6 The inner side of the retractable pull shaft 5 is provided with a guide opening 8, and one end of the lever body 3 is inserted into the guide opening 8.
[0027] In practice, the guide port 8 on the inner side of the retractable pull shaft 5 provides an insertion and force contact point for the end of the lever body 3, so that the rotational energy of the lever body 3 is converted into the linear lifting and lowering motion of the retractable pull shaft 5.
[0028] See Figure 1-6Foot pedal mounting holes are provided on both sides of the outer shell 1. Foot pedal body 10 is rotatably connected to the foot pedal mounting holes. A lever fixing hole is provided at the corresponding position of the outer shell 1 and the lever body 3. The lever body 3 can rotate around the lever fixing hole.
[0029] In practice, the foot pedal bodies 10 on both sides of the outer shell 1 are rotatably connected through foot pedal mounting holes. The operator can drive the lever body 3 to rotate around the lever fixing hole by stepping on the foot pedal body 10, thereby achieving the locking operation.
[0030] See Figure 1-6 It also includes a first decorative cover 9, a second decorative cover 11 and a mounting shaft 6. The first decorative cover 9 and the second decorative cover 11 are fixed to the outer shell 1 by rivetless riveting, forming a sealing structure together. The lever body 3 is fixedly connected to the mounting shaft 6, and the mounting shaft 6 is rotatably connected to the outer shell 1.
[0031] In practice, the first decorative cover 9 and the second decorative cover 11 form a fully enclosed structure, preventing external dust and debris from entering the interior of the outer shell 1.
[0032] See Figure 1-6 The outer shell 1 has a first tension spring hole and a reinforcing rib inside. The lever body 3 has a second tension spring hole that matches the tension spring body 4. One end of the tension spring body 4 is connected to the first tension spring hole of the lever body 3, and the other end is connected to the second tension spring hole of the outer shell 1.
[0033] In practice, the first tension spring hole of the outer shell 1 and the second tension spring hole of the lever body 3 can ensure that the two ends of the tension spring body 4 are stably connected and can extend and retract in a preset direction when subjected to force; the reinforcing ribs inside the outer shell 1 enhance the overall strength.
[0034] Working principle: The operator steps on the foot pedal body 10 on both sides of the outer shell 1. The foot pedal body 10 drives the lifting lever body 3 to rotate around the lifting lever fixing hole. At this time, the lifting lever body 3 pulls the tension spring body 4 to force it open. During the rotation, the contact end of the lifting lever body 3 with the impact inner tongue body 2 gradually forms a locking position with the impact inner tongue body 2, and changes the direction of force by means of lever transmission principle. The lever body 3 applies a downward force to the inward pull shaft 5 through the guide port 8. Under the guidance and positioning of the pull shaft guard plate, the inward pull shaft 5 descends steadily in the longitudinal direction, ultimately achieving the tight locking and fixing of the turnover tool. When an external force impacts the inner tongue body 2 from a distance, the reinforcing ribs on both sides disperse the impact force, reducing the deformation damage to the inner tongue body 2. Under the action of internal force, the inner tongue body 2 retracts, thus disengaging from the cooperation with the lever body 3. After the limit of the impact inner tongue body 2 is released, the tension spring body 4 releases the stored elastic potential energy and rebounds, pulling the lever body 3 to rotate in the opposite direction around the fixed hole, so that it is completely separated from the impact inner tongue body 2. The lever body 3, under the action of the rebound force, drives the inner pull shaft 5 to rise through the guide port 8. The inner pull shaft 5 moves longitudinally along the guide channel formed by the pull shaft guard plate, completing the unlocking or connection preparation action. After the action, the inner tongue body 2 returns to the preset position with the help of the positioning action of the inner tongue fixing pin 7.
Claims
1. A self-locking hook rear traction device, characterized in that, The system includes an outer shell (1), an inner impact tongue body (2) on the front side of the outer shell (1), a prying lever body (3) inside the outer shell (1), and a tension spring body (4) connected inside the outer shell (1), with one end of the tension spring body (4) connected to the prying lever body (3) and the other end fixedly connected to the outer shell (1). When the inner tongue body (2) is struck, the tension spring body (4) rebounds, causing the lever body (3) to separate from the inner tongue body (2), thereby driving the inner retracting shaft (5) to rise; when the lever body (3) is operated, the tension spring body (4) opens, causing the lever body (3) to cooperate with the inner tongue body (2), thereby driving the inner retracting shaft (5) to fall and achieve locking.
2. The self-locking hook traction as described in claim 1, characterized in that: The outer shell (1) has mounting holes on both sides for connecting the device frame, and the inner tongue body (2) has reinforcing ribs on both sides for buffering and protecting the inner tongue body (2) during impact.
3. The self-locking hook traction as described in claim 1, characterized in that: The outer shell (1) has an inner tongue fixing hole and an impact inner tongue fixing pin (7) inside the outer shell (1). The impact inner tongue fixing pin (7) passes through the inner tongue fixing hole and is connected to the impact inner tongue body (2) for fixing the impact inner tongue body (2).
4. The self-locking hook traction as described in claim 1, characterized in that: The inner retractable pull shaft (5) is provided with pull shaft guard plates on the upper and lower sides. The pull shaft guard plates are used to guide and position the inner retractable pull shaft (5).
5. The self-locking hook traction as described in claim 1, characterized in that: The inner side of the retractable pull shaft (5) is provided with a guide opening (8), and one end of the lifting lever body (3) is inserted into the guide opening (8).
6. The self-locking hook traction as described in claim 1, characterized in that: The outer shell (1) has foot pedal mounting holes on both sides, and a foot pedal body (10) is rotatably connected to the foot pedal mounting holes. The outer shell (1) and the lever body (3) have corresponding lever fixing holes, and the lever body (3) can rotate around the lever fixing hole.
7. The self-locking hook traction as described in claim 1, characterized in that: It also includes a first decorative cover (9), a second decorative cover (11) and a mounting shaft (6). The first decorative cover (9) and the second decorative cover (11) are fixed to the outer shell (1) by rivetless riveting, forming a sealing structure together. The lever body (3) is fixedly connected to the mounting shaft (6), and the mounting shaft (6) is rotatably connected to the outer shell (1).
8. The self-locking hook traction as described in claim 1, characterized in that: The outer shell (1) is provided with a first tension spring hole and a reinforcing rib inside. The lever body (3) is provided with a second tension spring hole that is adapted to the tension spring body (4). One end of the tension spring body (4) is connected to the first tension spring hole of the lever body (3), and the other end is connected to the second tension spring hole of the outer shell (1).