Mechanical stop mechanism based on door body opening and closing linkage

Abstract

This invention discloses a mechanical stopping mechanism based on the linkage between door opening and closing, belonging to the field of mechanical safety protection technology. It includes: a base; a bushing mounted on the base; a drive shaft fixedly connected to the door; a swing arm, with one end mounted on the drive shaft and the second end connected to a slider via a hinge shaft; and a pull rod slidably disposed within the bushing, with a groove at the end of the pull rod away from the bushing, and the slider slidably disposed within the groove. This invention utilizes the rotational motion of the door opening and closing as the sole power source, eliminating the need for electrical or pneumatic devices, achieving true physical interlocking, and fundamentally preventing safety vulnerabilities caused by electrical faults or human negligence.

Description

Technical Field

[0001] This invention belongs to the field of mechanical safety protection technology, and more specifically relates to a mechanical stop mechanism based on the linkage between door opening and closing. Background Technology

[0002] In existing logistics conveyor lines or automated equipment, to prevent personnel from entering hazardous areas (such as near running chains or moving goods) when doors are open, independent safety devices are often required, such as photoelectric sensors, limit switches, or manual latches. These methods have the following shortcomings: 1. High independence and high cost: Photoelectric sensors or electronic locks require independent power supply, control and signal feedback systems, which are complex in structure and have high cost.

[0003] 2. Reliability issues: Electronic components may be affected by environmental interference or malfunction, posing a risk of false alarms or failure.

[0004] 3. Reliance on manual operation: Manual latches or levers require personnel to operate them consciously, which poses a safety hazard due to forgetting or improper operation, and cannot achieve forced interlocking.

[0005] Therefore, there is an urgent need for a stop mechanism that is simple in structure, purely mechanically linked, highly reliable, and can be forced to move synchronously with the opening and closing of the door. Summary of the Invention

[0006] This invention aims to provide a stop mechanism that is simple in structure, purely mechanically linked, highly reliable, and can be forced to move synchronously with the opening and closing of a door. To achieve the above objective, this invention adopts the following technical solution: A mechanical stopping mechanism based on the linkage between door opening and closing includes: Base; Bushing mounted on the base; A drive shaft that is fixedly connected to the door body; A swing arm, the first end of which is mounted on the drive shaft, and the second end of which is connected to a slider via a hinge shaft; A pull rod is slidably disposed within the bushing, and a groove is provided at the end of the pull rod away from the bushing, and a slider is slidably disposed within the groove; When the door opens or closes, it drives the drive shaft to rotate; the drive shaft drives the swing arm to swing, and the swing arm drives the slider 6 to slide in the groove of the pull rod, with the movement trajectory restricted by the groove; when the door rotates to a specific angle, the slider moves along the groove to one end of the groove under the drive of the swing arm; at this time, the groove generates a reverse constraint force on the slider, causing the pull rod to extend straight out of the bushing along its axial direction, thereby blocking the links of the drive chain and the goods on the conveyor line from continuing to move forward, achieving double physical interception.

[0007] Furthermore, the first end of the swing arm is provided with a square tenon hole that mates with the keyway on the drive shaft, so as to realize that the swing arm rotates synchronously with the drive shaft.

[0008] Furthermore, the slider is nested in the groove on the side or end of the pull rod and can slide along the groove.

[0009] Furthermore, it also includes an auxiliary spring, one end of which is connected to the slider and the other end of which is connected to the base.

[0010] Furthermore, the auxiliary spring is always kept in a stretched state to apply a constant pulling force toward the base to the slider.

[0011] Furthermore, the pull rod is a long rod, and the groove machined on its body is long and narrow.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. Purely mechanical forced interlock: Utilizing the rotational motion of the door opening and closing as the sole power source, it eliminates the need for electricity or pneumatic devices, achieving true physical interlock and fundamentally preventing safety loopholes caused by electrical faults or human negligence.

[0013] 2. Simple structure and low cost: It is mainly composed of standard mechanical parts such as rods, shafts, and sliders. The structure is simple and the manufacturing, installation and maintenance costs are low.

[0014] 3. High reliability and long service life: The mechanical structure is highly resistant to the environment and is not easily affected by dust, humidity, etc., ensuring reliable operation and a long service life.

[0015] 4. Synchronized and intuitive operation: The extension and retraction of the stop lever are completely synchronized with the opening and closing of the door, the status is intuitively visible, and the safety function is clear. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the mechanical stop mechanism based on the door opening and closing linkage provided by the present invention, installed on the door body.

[0018] Figure 2 for Figure 1 Cross-sectional view of BB (with the door closed).

[0019] Figure 3 for Figure 1 Cross-sectional view of BB (with the door open).

[0020] Figure 4 This is an enlarged schematic diagram of the connection between the transmission components (drive shaft, swing arm, slider) and the pull rod.

[0021] The components are: 1. base; 2. bushing; 3. door body; 4. drive shaft; 5. swing arm; 6. slider; 7. pull rod; 8. auxiliary spring; 9. slide groove. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1

[0024] refer to Figures 1 to 4 A mechanical stopping mechanism based on the linkage between door opening and closing includes: Base 1; Bushing 2 is mounted on base 1; The drive shaft 4 is fixedly connected to the door body 3; The first end of the swing arm 5 is mounted on the drive shaft, and the second end of the swing arm 5 is connected to the slider 6 via a hinge shaft. A pull rod 7 is slidably disposed within a bushing 2. A groove 9 is provided at the end of the pull rod 7 away from the bushing 2, and a slider 6 is slidably disposed within the groove 9. When the door 3 opens or closes, it drives the drive shaft 4 to rotate. The drive shaft 4 drives the swing arm 5 to swing, and the swing arm 5 drives the slider 6 to slide in the groove 9 of the pull rod 7. The movement trajectory is restricted by the groove 9. When the door 3 rotates to a specific angle (such as fully open or nearly fully open), the slider 6 moves along the groove 9 to one end of the groove 9 under the drive of the swing arm 5. At this time, the groove 9 generates a reverse constraint force on the slider 6, causing the pull rod 7 to extend straight out of the bushing 2 along its axis (towards the inside of the door) to block the links of the drive chain and the goods on the conveyor line from continuing to move forward, thus achieving double physical interception.

[0025] In this embodiment, the first end of the swing arm 5 is provided with a square tenon hole that mates with the keyway on the drive shaft 4, so as to realize that the swing arm 5 and the drive shaft 4 rotate synchronously.

[0026] In this embodiment, the slider 6 is nested in the groove 9 on the side or end of the pull rod 7 and can slide along the groove 9.

[0027] Specifically, the door body 3 is rigidly connected to the drive shaft 4 via an end key, ensuring synchronous rotation between the two. Three swing arms 5 (which can be added or removed as needed) are mounted on the drive shaft 4, and the square tenon hole at one end of each swing arm 5 fits tightly with the square tenon on the drive shaft 4. The other end of each swing arm 5 is hinged to a slider 6 via a pin.

[0028] The pull rod 7 is a long rod with a long, narrow groove 9 machined into its body. The pull rod 7 passes through the straight bushing 2 mounted on the base 1 and can slide freely along the axis of the bushing 2. The slider 6 on the swing arm 5 fits precisely into the groove 9 corresponding to the pull rod 7.

[0029] The reset mechanism of the mechanical stop mechanism based on the door opening and closing linkage provided in this embodiment is as follows: when the door 3 is closed, the door 3 drives the drive shaft 4 to rotate in the opposite direction, and drives the pull rod 7 to move in the opposite direction through the swing arm 5 and the slider 6, and finally pulls the pull rod 7 completely back (retracted to the outside of the door), releasing the obstruction to the chain and goods, and the equipment can resume normal operation.

[0030] The mechanical stop mechanism based on the door opening and closing linkage provided in this embodiment also includes an auxiliary spring 8, one end of which is connected to the slider 6 and the other end is connected to the base 1.

[0031] The auxiliary spring 8 is always kept in a stretched state to apply a constant pulling force toward the base 1 to the slider 6.

[0032] The purpose of the auxiliary spring 8 is to ensure smooth sliding of the slider 6 within the groove 9 and to prevent jamming due to mechanism gaps or friction. One end of the auxiliary spring 8 is mounted on the base 1, and the other end is connected to the slider 6, remaining under tension at all times. The tension of the auxiliary spring 8 provides a preload to the slider, allowing it to move tightly against the groove wall, thus improving the certainty and smoothness of the mechanism's movement.

[0033] The working process of the mechanical stop mechanism based on the door opening and closing linkage provided in this embodiment is as follows: Door opening and stopping process (reference) Figure 3 When door 3 is pushed open, door 3 drives drive shaft 4 to rotate counterclockwise (as shown in the diagram). The rotation of drive shaft 4 causes swing arm 5 to swing upward, and swing arm 4 drives slider 6 to slide to the right (towards the end of the groove) within the groove 9 of pull rod 7. When door 3 is opened to a set angle (e.g., 40°), slider 6 has slid to the rightmost end of groove 9. At this point, if swing arm 5 continues to swing, slider 6 will be unable to continue sliding within groove 9, and the right end wall of groove 9 will exert a leftward pushing force on slider 6. This pushing force ultimately forces the entire pull rod 7 to move linearly to the left (i.e., towards the inside of the door) until it is fully extended. The extended pull rod one and pull rod two respectively block the drive chain and the cargo travel path.

[0034] Door closing and reset process (reference) Figure 2 When door 3 is closed, drive shaft 4 rotates clockwise, swing arm 5 swings downward, causing slider 6 to slide to the left within slide groove 9. Similarly, when slider 6 slides to the leftmost end of slide groove 9, it will force pull rod 7 to move straight to the right (i.e., to the outside of the door), fully retracting and resetting, thus releasing the obstruction.

[0035] Throughout the process, the tension of the auxiliary spring 8 keeps the slider 6 in contact with one side wall of the groove 9, eliminating movement gaps and ensuring the immediacy of force transmission and the precision of the action.

[0036] The mechanical stop mechanism based on door opening and closing linkage provided by this invention can be used in logistics conveyor lines, automated warehouses or industrial equipment, and can be linked with passage doors, inspection doors or protective doors to automatically trigger a safety stop mechanism to prevent the drive chain or goods from running accidentally when the door is opened.

[0037] The technical solutions of the present invention have been fully described above. It should be noted that the specific embodiments of the present invention are not limited to the above description. All technical solutions formed by those skilled in the art based on the spirit and essence of the present invention by adopting equivalent transformations or equivalent transformations in terms of structure, method or function fall within the protection scope of the present invention.

Claims

1. A mechanical stopping mechanism based on the linkage between door opening and closing, characterized in that, include: Base (1); Bushing (2) mounted on the base (1); The drive shaft (4) is fixedly connected to the door body (3); A swing arm (5), the first end of which is mounted on the drive shaft, and the second end of which is connected to a slider (6) via a hinge shaft. A pull rod (7) is slidably disposed in the bushing (2), and a groove (9) is provided at one end of the pull rod (7) away from the bushing (2), and a slider (6) is slidably disposed in the groove (9); When the door (3) opens or closes, it drives the drive shaft (4) to rotate; the drive shaft (4) drives the swing arm (5) to swing, and the swing arm (5) drives the slider (6) to slide in the groove (9) of the pull rod (7), and the movement trajectory is restricted by the groove (9); when the door (3) rotates to a specific angle, the slider (6) moves along the groove (9) to one end of the groove (9) under the drive of the swing arm (5); at this time, the groove (9) generates a reverse constraint force on the slider (6), so that the pull rod (7) extends straight out of the bushing (2) along its axial direction to block the chain links of the drive chain and the goods on the conveyor line from continuing to move forward, thereby achieving double physical interception.

2. The mechanical stop mechanism based on door opening and closing linkage according to claim 1, characterized in that, The first end of the swing arm (5) is provided with a square tenon hole that mates with the keyway on the drive shaft (4) so ​​as to realize that the swing arm (5) and the drive shaft (4) rotate synchronously.

3. The mechanical stop mechanism based on door opening and closing linkage according to claim 1, characterized in that, The slider (6) is nested in the groove (9) on the side or end of the pull rod (7) and can slide along the groove (9).

4. The mechanical stop mechanism based on door opening and closing linkage according to claim 1, characterized in that, It also includes an auxiliary spring (8), one end of which is connected to the slider (6) and the other end is connected to the base (1).

5. The mechanical stop mechanism based on door opening and closing linkage according to claim 4, characterized in that, The auxiliary spring (8) is always kept in a stretched state to apply a constant pulling force toward the base (1) to the slider (6).

6. The mechanical stop mechanism based on door opening and closing linkage according to claim 4, characterized in that, The pull rod (7) is a long rod, and the groove (9) machined on its body is long and narrow.

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