Expansion type anti-disengagement safety pin
By installing a symmetrical torsion spring projecting limit arm on the head of the airborne external device, the problem of traditional insurance pin shaking under complex conditions is solved, the effect of preventing the release is achieved, and the plugging and unplugging action is simplified to ensure that The safety and stability of the device are achieved.
Patent Information
- Application Number
- CN202420861785.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-22
AI Technical Summary
When used in complex field conditions, traditional insurance pins are prone to shaking out due to uneven ground and engine vibration, resulting in accidental breakout and inability to work stably, resulting in damage to the safety of aviation airborne external devices during maintenance.
A swelling and opening type anti-release safety pin is designed, and the torsion spring projection limit arm is installed on the head of the safety pin to compress and expand to prevent disengagement, and the torsion spring limit arm tension is overcome by increasing the pulling force. To simplify plug-and-removal action.
Effectively prevent the safety pin from falling out of the suspended object during use, ensuring structural rigidity and reliability, simplifying structural design, and curing the insertion and pulling force through the tension of the torsion spring limit arm, ensuring safe operation.
Smart Images
Figure CN222229103U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of mechanical structure design, and specifically relates to an expansion type anti-slipping safety pin, which is an expansion type anti-slipping safety pin for an aviation external hanging device matching a ground safety protection device in an airborne system. Background Art
[0002] The pylons, hooks, beams, guides, etc. in the aircraft-mounted external devices must be operated and maintained on the ground with ground safety measures. Therefore, safety pins are designed on the pylons, hooks, beams, guides, etc. After the safety pins are inserted into specific parts of the external devices, they cut into the key parts of the actuating mechanism inside the device, physically blocking unexpected movements. At the same time, the insertion of the safety pins also cuts off the key circuits, providing dual safety protection in terms of both mechanical and circuit aspects. Pull out the safety pins before the aircraft takes off to restore the functions of various parts and ensure the normal operation of the external devices. Safety pins are generally used as random accessories for each supporting external device. Although the safety pins will not be carried into the sky with the aircraft, their role in the entire ground maintenance and guarantee process cannot be underestimated.
[0003] With the technological development of aviation airborne external devices, the functional requirements of safety pins are also constantly improving. There are more and more application scenarios of aircraft carriers on shipboard conditions and in complex field conditions. However, the use of traditional safety pins in these complex conditions has problems with stable operation. Factors such as uneven airports and engine vibrations often shake out the inserted safety pins, causing accidents. Therefore, the design demand for operable anti-dislodgement safety pins came into being. Utility Model Content
[0004] Purpose of the utility model: In order to adapt to the use and maintenance needs of the carrier aircraft in various environments, a safety pin is provided that can be prevented from falling out through simple operation. After the safety pin is directly inserted into the corresponding safety pin hole of the bracket and the hook, the protruding limit arms symmetrically arranged by the torsion spring installed in the head of the safety pin will naturally expand, so as to prevent the safety pin from falling out of the hanging object during use and causing an accident. To pull out the safety pin before takeoff, it is only necessary to increase the pulling force to overcome the tension of the torsion spring limit arm, and the safety pin can be pulled out with a simple action.
[0005] The technical solution of the utility model is as follows: an expansion type anti-slip safety pin, comprising: a pin head, a torsion spring shaft, a torsion spring, and a safety pin rod; a torsion spring mounting hole with a predetermined depth is formed near the head of the safety pin rod, and prefabricated notches are formed on both sides for mounting the torsion spring, and two torsion spring protruding limit arms of the torsion spring extend out of the outer diameter of the safety pin rod through the notches; a mounting hole is provided at the center of the torsion spring of the safety pin rod for mounting the torsion spring shaft, for fixing the torsion spring; a pin head is provided at the head of the safety pin rod.
[0006] Furthermore, the rod body of the safety pin rod is a solid structure, with a knurled section at the tail for easy gripping, and a mounting hole at the end for installing a hanging ring, and a reminder ribbon is tied on the hanging ring to remind ground staff to operate the safety pin as required.
[0007] Furthermore, "L"-shaped slots are symmetrically opened on both sides of the torsion spring mounting hole, and the protruding limiting arms of the torsion spring extend out of the outside of the safety pin rod through the "L"-shaped slots; the ends of the two protruding limiting arms of the torsion spring are inserted into the hole in the middle of the safety pin rod, and at the same time, the ends of the two legs of the torsion spring are limited by the hole in the middle of the safety pin rod, so that the torsion spring can finally be installed in the corresponding position in the safety pin rod.
[0008] Furthermore, the torsion spring is of a symmetrical structure, the front end is wound to form a torsion spring center hole, and the torsion spring shaft and the torsion spring sleeve are cooperatively arranged in the torsion spring center hole.
[0009] Furthermore, the two torsion spring protruding limiting arms of the torsion spring can freely open and close a certain angle, and the outer diameter of the torsion spring sleeve is slightly smaller than the inner diameter of the torsion spring sleeve hole.
[0010] Furthermore, the two torsion arms of the torsion spring and the protruding limiting arms of the torsion spring are in the shape of an arc protruding outward, so that the protruding limiting arms of the torsion spring are compressed when the safety pin is inserted or pulled out.
[0011] Furthermore, the pin head is in a conical shape.
[0012] When the utility model is in use, the torsion spring installed on the head of the safety pin has symmetrical protruding limiting arms, which protrude from the outer circle of the safety pin body. When the safety pin is inserted into the safety pin hole of the suspension device, the protruding limiting arms of the torsion spring need to be compressed. When the head of the safety pin extends out of the outer surface of the suspension device, the protruding limiting arms of the torsion spring expand again to prevent the safety pin from falling out of the hanging object. The action of pulling out the safety pin is consistent with the insertion action. It only needs to increase the insertion and extraction force to overcome the tension of the torsion spring to complete the insertion and extraction action.
[0013] The main advantages of the utility model are: the solid structure of the safety pin body can effectively overcome the load transmitted to the safety pin during accidental action, thereby ensuring the structural rigidity of the safety pin and the reliability of the safety action; the use of a torsion spring installed on the head as an anti-disengagement design greatly simplifies the complexity of the structure; the insertion and extraction force can be solidified by designing the tension of the torsion spring limit arm, and the amount of compression for anti-disengagement depends on the size of the torsion spring limit arm extending out of the diameter of the safety pin body. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0015] Figure 2 It is a schematic diagram of the structure of the utility model;
[0016] Figure 3This is a schematic diagram of the front section structure of the utility model;
[0017] Figure 4 This is a schematic diagram of the semi-section structure of the utility model;
[0018] Figure 5 It is a half-section three-dimensional schematic diagram of the utility model;
[0019] Figure 6 This is a schematic diagram of the structure of the safety pin rod head of the utility model;
[0020] Figure 7 This is a schematic diagram of the torsion spring structure of the utility model;
[0021] In the figure: 1-pin head; 2-torsion spring shaft; 3-torsion spring; 4-safety pin rod; 5-hanging ring; 6-reminder ribbon; 7-torsion spring shaft sleeve.
[0022] 401-pin head fixing hole; 402-torsion spring shaft mounting hole; 403-torsion spring mounting slot; 404-torsion spring tail limiting hole.
[0023] 301-torsion spring shaft sleeve hole; 302-torsion spring protruding limiting arm; 303-torsion spring tail limiting arm. DETAILED DESCRIPTION
[0024] The specific implementation modes of the present utility model are described in detail below according to the accompanying drawings.
[0025] like Figure 1 , 2 As shown, an expansion type anti-dropout safety pin for an aviation external hanging device comprises 1-pin head; 2-torsion spring shaft; 3-torsion spring; 4-safety pin rod; 5-hanging ring; 6-reminder ribbon; 7-torsion spring shaft sleeve. The safety pin rod 4 is the same as a conventional safety pin as a whole, with a solid rod body, a knurled section at the tail for easy gripping, and a mounting hole at the end for mounting a hanging ring 5, on which a reminder ribbon 6 is tied to remind ground staff to operate the safety pin as required; a hole of a predetermined depth is formed at the head of the safety pin rod 4, and prefabricated notches are formed on both sides for mounting a torsion spring 3, and two torsion spring protruding limit arms of the torsion spring 3 extend out of the outer diameter of the safety pin rod 4 through the notches; a mounting hole is formed at the center of the torsion spring of the safety pin rod 4 for mounting a torsion spring shaft 2 to fix the torsion spring 3; the head of the safety pin rod 4 is connected with a pin head 1 by a thread, so that the safety pin becomes a whole, which is convenient for the safety pin to be inserted into the safety pin hole of the hanging object.
[0026] like Figure 3 , 4As shown in , 5, an expansion type anti-slip safety pin of an aviation external hanging device, the head of the safety pin rod 4 is threadedly connected to the pin head 1, a hole of a predetermined depth is opened in the head of the safety pin rod, and "L"-shaped notches are symmetrically opened on both sides of the hole, and the protruding limiting arms of the torsion spring 3 extend out of the outside of the safety pin rod 4 through the "L"-shaped notches; the front mounting hole of the safety pin rod 4 is equipped with a torsion spring shaft 2, and the torsion spring sleeve 7 is sleeved in the center hole of the torsion spring 3 to ensure the stability of the torsion spring 3 during operation; the ends of the two protruding limiting arms of the torsion spring 3 are both inserted into the middle hole of the safety pin rod 4, the center hole of the torsion spring 3 is limited by the torsion spring sleeve 7, and the ends of the two legs are also limited by the hole in the middle of the safety pin rod 4, so that the torsion spring 3 can be installed in the corresponding position in the safety pin rod 4.
[0027] like Figure 6 As shown, a pin head fixing hole 401 at the head of the safety pin rod 4 of an expansion type anti-slip safety pin for an aviation external hanging device is a threaded hole, which is used for threaded fixed connection with the pin head 1; the torsion spring shaft mounting hole 402 at the front of the safety pin rod 4 is used for mounting the torsion spring shaft 2, on which a torsion spring shaft sleeve 7 is sleeved and mounted, and the torsion spring shaft sleeve 7 is sleeved in the torsion spring shaft sleeve hole 301 of the torsion spring 3; two torsion spring mounting grooves 403 arranged radially and symmetrically are provided on the safety pin rod 4, which are in an "L" shape, and the spring at the torsion spring shaft sleeve hole 301 of the torsion spring 3 accommodates the thicker part of the "L"-shaped groove, and the two radially arranged "L" narrow grooves respectively accommodate the two torsion spring protruding limiting arms 302 of the torsion spring 3; the torsion spring tail limiting hole 404 of the safety pin rod 4 cooperates with the torsion spring tail limiting arm 303 of the torsion spring 3, and finally fixes the installation position of the torsion spring 3 on the safety pin rod 4;
[0028] like Figure 7 As shown, the center of an expansion-type anti-slip safety pin torsion spring 3 of an aviation external hanging device is a torsion spring sleeve hole 301 for installing a torsion spring sleeve 7. In order to ensure that the two torsion arms of the torsion spring 3 can freely open and close a certain angle, the outer diameter of the torsion spring sleeve 7 is slightly smaller than the inner diameter of the torsion spring sleeve hole 301; the torsion spring protruding limiting arms 302 of the two torsion arms of the torsion spring 3 are in the shape of an arc protruding outward, so that the torsion spring protruding limiting arms 302 are compressed when the safety pin is inserted or pulled out, and an additional external force needs to be provided during the insertion and removal process, which also prevents the safety pin from slipping out of the hanging object; the ends of the two torsion arms of the torsion spring 3 are torsion spring tail limiting arms 303, which cooperate with the torsion spring tail limiting hole 404 of the safety pin rod 4, are inserted into the torsion spring tail limiting hole 404, and limit the opening angle of the two torsion arms of the torsion spring 3.
[0029] The utility model is an expansion-type anti-dropout safety pin for an aviation external hanging device designed as above, which uses a torsion spring with symmetrical protruding limit arms installed on the head for limiting. The safety pin is inserted into the suspension device to compress the protruding limit arm of the torsion spring. After passing through the safety pin hole of the suspension device, the protruding limit arm of the torsion spring expands under the action of the elastic force of the torsion spring to prevent the safety pin from accidentally falling out. When pulling out the safety pin, it is necessary to increase the pulling force to overcome the tension of the torsion spring limit arm, so that it contracts and passes through the safety pin hole of the suspension device, and the safety pin is pulled out to release the safety action.
[0030] Finally, it should be noted that the above implementation methods or implementation cases are only used to illustrate the technical solution of the utility model, and any incomplete details are regarded as conventional technical means or common knowledge in the field; it should be understood that the protection scope of the utility model is not limited to the above specific implementation forms, and any technician familiar with the field can easily think of various equivalent modifications or substitutions within the technical scope disclosed in the utility model, and these modifications or substitutions should be covered within the protection scope of the utility model.
Claims
1. An expansion type anti-dropout safety pin, characterized in that: include: A pin head, a torsion spring shaft, a torsion spring, and a safety pin rod; a torsion spring mounting hole with a predetermined depth is provided near the head of the safety pin rod, and prefabricated notches are provided on both sides for installing the torsion spring, and two torsion spring protruding limit arms of the torsion spring extend out of the outer diameter of the safety pin rod through the notches; a mounting hole is provided at the center of the torsion spring of the safety pin rod for installing the torsion spring shaft, which is used to fix the torsion spring; a pin head is provided at the head of the safety pin rod.
2. The expansion-type anti-dropout safety pin according to claim 1, characterized in that: The rod body of the safety pin rod is a solid structure, the tail is provided with a knurled section for easy gripping, and the end is provided with a mounting hole for mounting a hanging ring.
3. The expansion-type anti-dropout safety pin according to claim 1, characterized in that: "L"-shaped notches are symmetrically opened on both sides of the torsion spring installation hole, and the protruding limiting arms of the torsion spring extend out of the safety pin rod through the "L"-shaped notches; the ends of the two protruding limiting arms of the torsion spring are inserted into the hole in the middle of the safety pin rod, and at the same time, the ends of the two legs of the torsion spring are limited by the hole in the middle of the safety pin rod, so that the torsion spring can finally be installed in the corresponding position in the safety pin rod.
4. The expansion-type anti-dropout safety pin according to claim 3, characterized in that: The torsion spring is of symmetrical structure, and the front end is wound to form a torsion spring center hole, and the torsion spring shaft and the torsion spring sleeve are cooperatively arranged in the torsion spring center hole.
5. The expansion-type anti-dropout safety pin according to claim 4, characterized in that: The two torsion spring protruding limiting arms of the torsion spring can be freely opened and closed at a certain angle, and the outer diameter of the torsion spring sleeve is slightly smaller than the inner diameter of the torsion spring sleeve hole.
6. The expansion-type anti-dropout safety pin according to claim 5, characterized in that: The two torsion arms of the torsion spring and the protruding limiting arms of the torsion spring are in an arc shape protruding outward, so that the protruding limiting arms of the torsion spring are compressed when the safety pin is inserted or pulled out.
7. The expansion-type anti-dropout safety pin according to claim 1, characterized in that: The pin head is in a conical shape.