Anti-falling locking structure of cylindrical pin

Abstract

The utility model relates to mechanical connecting component technical field, concretely relates to a kind of anti-falling locking structure of cylindrical pin, including cylindrical pin, pinhole and anti-falling assembly, the inside of cylindrical pin is equipped with pinhole, the inner wall of pinhole is provided with anti-falling assembly, the anti-falling assembly includes the sliding slot of being equipped in the inner top wall and inner bottom wall of pinhole, the inner wall of sliding slot is slidably connected with slider, two the slider is fixedly connected with compression spring between, the inner side wall of pinhole is equipped with receiving groove, eight the inner wall of receiving groove is fixedly connected with return spring, the one end of return spring is fixedly connected with locking block, the surface of slider and the surface of locking block are all filleted, the surface of slider and the surface of locking block can be abutted.The utility model, by setting anti-falling assembly, overall improve cylindrical pin locking reliability, installation convenience and adaptability, meet the connection demand of various mechanical systems.

Description

Technical Field

[0001] This utility model relates to the field of mechanical connection components, and in particular to a locking structure for preventing the cylindrical pin from falling off. Background Technology

[0002] In the field of mechanical engineering, cylindrical pins, as a simple, low-cost, and highly accurate connecting component, are widely used in the assembly of various mechanical systems. Their core function is to restrict the relative displacement (such as axial movement or circumferential rotation) between two or more components by inserting them into coaxial pin holes, thereby ensuring the overall stability and motion accuracy of the mechanical structure. From application scenarios, from small components like motors in household appliances and transmission mechanisms in office equipment, to large components like suspension systems in automobile chassis, hydraulic supports in construction machinery, and cabin connections in aerospace equipment, cylindrical pins play a crucial role in "connection and positioning," and their performance stability directly affects the operational safety and service life of the entire mechanical system.

[0003] Existing anti-loosening locking structures for cylindrical pins rely on a single locking method. In the vibration environment of long-term operation of mechanical systems, the engagement point is prone to wear and the threads are prone to loosening, leading to locking failure. During installation, the lack of a precise guiding structure makes it difficult to quickly align the cylindrical pin with the pin hole of the connector, requiring repeated adjustments. This not only prolongs assembly time but may also cause component damage due to forced insertion. Furthermore, the lack of dual anti-loosening protection means that once a single locking structure fails, there is no backup locking mechanism, and the cylindrical pin can easily detach from the connector, directly causing mechanical transmission interruption, structural misalignment, and other malfunctions, even endangering the safe operation of the equipment. Utility Model Content

[0004] The purpose of this invention is to solve the problems of poor locking stability and easy loosening and falling off of existing devices, and to propose a cylindrical pin anti-fall-off locking structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a locking structure for preventing the detachment of a cylindrical pin, comprising a cylindrical pin, a pin hole, and an anti-detachment component. The cylindrical pin has a pin hole inside, and the inner wall of the pin hole is provided with an anti-detachment component. The anti-detachment component includes a sliding groove formed on the top and bottom walls of the pin hole. A sliding member is slidably connected to the inner wall of the sliding groove. A compression spring is fixedly connected between two of the sliding members. A receiving groove is formed on the inner side wall of the pin hole. A return spring is fixedly connected to the inner wall of eight receiving grooves. A locking block is fixedly connected to one end of the return spring. The surfaces of the sliding members and the locking block are both rounded, and the surfaces of the sliding members and the locking block can abut against each other.

[0006] Furthermore, guide blocks are fixedly connected to the inner walls of both ends of the cylindrical pin, and connectors are inserted and connected to both ends of the cylindrical pin.

[0007] Furthermore, the eight storage slots are divided into four groups on one side, and two locking slots are opened on each side of the two connecting parts.

[0008] Furthermore, the inner walls of the eight locking grooves are fixedly connected with anti-slip pads, and guide grooves are provided at the middle of the surfaces of the two connectors.

[0009] Furthermore, the surface of the guide block is slidably and locked to the guide groove, and the top and bottom of the two sliding parts are fixedly connected to sliders.

[0010] Furthermore, the surfaces of the four sliders are slidably connected to the inner wall of the groove, and the two ends of the cylindrical pin surface are provided with spiral patterns.

[0011] Furthermore, the surfaces of the two connectors are fixedly connected with limit rings, and fastening caps are slidably connected between the two limit rings. The inner walls of the two fastening caps are threaded to the spiral pattern, and anti-slip grooves are formed on the surfaces of the two fastening caps.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] In this invention, an anti-drop component is incorporated. The sliding member of the anti-drop component slides along a groove, and a compression spring provides a restoring force. The sliding member presses against the locking block through its rounded surface, causing the locking block to compress the restoring spring and retract into a receiving slot or pop out. The popped-out locking block engages with the locking groove of the connector, forming a preliminary lock. An anti-slip pad increases friction, preventing the locking block from loosening. This solves the problems of single locking and easy detachment in existing devices. The slider and groove cooperate to ensure smooth sliding of the slider, preventing deviation from affecting the locking effect. The guide block of the cylindrical pin slides and engages with the guide groove of the connector, achieving precise installation guidance and preventing damage to the connector. To reduce misalignment and improve assembly efficiency, the spiral pattern on the cylindrical pin surface connects with the threaded fastening cap. The fastening cap slides between the limit rings, clamping the connector and forming a secondary lock. This, along with the anti-drop component, provides double anti-drop protection, further enhancing stability. The anti-slip groove allows for easy manual tightening of the fastening cap without special tools, simplifying installation and disassembly. The eight storage slots are grouped in fours to fit the locking slots on both sides of the connector, ensuring even distribution of locking force. It is compatible with connectors of different specifications, expanding the scope of application. Overall, it improves the reliability, ease of installation, and adaptability of the cylindrical pin locking mechanism, meeting the connection needs of various mechanical systems. Attached Figure Description

[0014] Figure 1 A three-dimensional front view of a cylindrical pin anti-loosening locking structure is provided for this utility model;

[0015] Figure 2 This utility model provides an internal structural diagram of a cylindrical pin anti-loosening locking structure.

[0016] Figure 3 This utility model provides a schematic diagram of the separation structure of a cylindrical pin anti-loosening locking structure;

[0017] Figure 4 This utility model provides a schematic diagram of the anti-loosening component in an anti-loosening locking structure for a cylindrical pin.

[0018] Figure 5 This utility model presents a schematic diagram of the separation structure of the anti-loosening component in an anti-loosening locking structure for a cylindrical pin.

[0019] Legend:

[0020] 1. Cylindrical pin; 2. Pin hole; 3. Anti-fall component; 31. Slide groove; 32. Sliding part; 33. Compression spring; 34. Storage groove; 35. Return spring; 36. Locking block; 4. Guide block; 5. Connecting part; 6. Locking groove; 7. Anti-slip pad; 8. Guide groove; 9. Slider; 10. Spiral pattern; 11. Limiting ring; 12. Fastening cap; 13. Anti-slip groove. Detailed Implementation

[0021] Please see Figure 1-5 This utility model provides a technical solution: a locking structure for preventing the cylindrical pin from falling off, including a cylindrical pin 1, a pin hole 2 and an anti-fall-off component 3. The cylindrical pin 1 has a pin hole 2 inside, and the anti-fall-off component 3 is provided on the inner wall of the pin hole 2.

[0022] The following section will explain the specific settings and functions of its anti-fall-off component 3.

[0023] In this embodiment: the anti-fall-off component 3 includes a sliding groove 31 opened in the top and bottom walls of the pin hole 2. A sliding member 32 is slidably connected to the inner wall of the sliding groove 31. A compression spring 33 is fixedly connected between two sliding members 32. A storage groove 34 is opened in the inner side wall of the pin hole 2. A return spring 35 is fixedly connected to the inner wall of eight storage grooves 34. A locking block 36 is fixedly connected to one end of the return spring 35. The surfaces of the sliding members 32 and the locking blocks 36 are rounded. The surfaces of the sliding members 32 and the locking blocks 36 can abut against each other.

[0024] The effects achieved by the above components are as follows: the sliding groove 31 provides a sliding path for the slider 32, the compression spring 33 provides a reset force for the slider 32, and when the slider 32 moves, the rounded corner surface presses the locking block 36, causing the locking block 36 to compress the reset spring 35 and be stored in the receiving groove 34 or pop out under the action of the reset spring 35; the popped-out locking block 36 can engage with the external structure to achieve the initial locking of the cylindrical pin 1 and prevent it from falling out of the connector. The rounded corner design reduces the frictional resistance when the slider 32 and the locking block 36 come into contact, ensuring smooth cooperation between the two.

[0025] Please see Figure 4 Specifically, guide blocks 4 are fixedly connected to the inner walls of both ends of the cylindrical pin 1, and connectors 5 are inserted and connected to both ends of the cylindrical pin 1.

[0026] The effects achieved by the above components are as follows: by setting the guide block 4, positioning guidance is provided when the cylindrical pin 1 and the connector 5 are inserted, ensuring that the two are quickly aligned and inserted, and avoiding insertion deviation; the cylindrical pin 1 is connected to the connector 5 through both ends, realizing the initial assembly of the two connectors 5, laying the foundation for subsequent locking.

[0027] Please see Figure 5 Specifically, the eight storage slots 34 are divided into four groups of four on one side, and two locking slots 6 are opened on both sides of the surface of the two connectors 5.

[0028] The effect achieved by the above components is as follows: by setting the storage slots 34 in groups of four distributed at both ends of the cylindrical pin 1, the pop-out locking blocks 36 can act on both sides of the connector 5 accordingly; the locking grooves 6 on the surface of the connector 5 are adapted to the locking blocks 36, and when the locking blocks 36 pop out, they are locked into the locking grooves 6, forming a locking between the cylindrical pin 1 and the connector 5, further preventing the cylindrical pin 1 from falling off. The group design ensures that the locking force is evenly distributed and improves the locking stability.

[0029] Please see Figure 3-4 Specifically, the inner walls of the eight locking grooves 6 are fixedly connected with anti-slip pads 7, and guide grooves 8 are opened at the middle of the surfaces of the two connectors 5.

[0030] The effects achieved by the above components are as follows: by setting the anti-slip pad 7, the friction between the locking block 36 and the inner wall of the locking groove 6 is increased, preventing the locking block 36 from loosening in the locking groove 6 and strengthening the locking effect; the guide groove 8 cooperates with the guide block 4 of the cylindrical pin 1 to further improve the guiding accuracy when the cylindrical pin 1 and the connector 5 are inserted, ensuring that the locking block 36 is accurately aligned with the locking groove 6.

[0031] Please see Figure 5 Specifically, the surface of the guide block 4 is slidably and locked to the guide groove 8, and the top and bottom of the two sliders 32 are fixedly connected to the sliders 9.

[0032] The effects achieved by the above components are as follows: by setting the guide block 4 and the guide groove 8 to slide and engage, the insertion is guided, and the relative rotation between the cylindrical pin 1 and the connector 5 is restricted after insertion, so as to prevent the locking block 36 from disengaging from the locking groove 6 due to rotation; the slider 9 cooperates with the slide groove 31 to limit the sliding direction of the slider 32, prevent the slider 32 from deviating or disengaging from the slide groove 31 during the sliding process, and ensure that the slider 32 stably squeezes or releases the locking block 36.

[0033] Please see Figure 3Specifically, the surfaces of the four sliders 9 are slidably connected to the inner wall of the groove 31, and the two ends of the cylindrical pin 1 are provided with spiral patterns 10.

[0034] The effects achieved by the above components are as follows: by setting the slider 9 to slide along the slide groove 31, the smoothness of the sliding of the slider 32 is further enhanced, ensuring that the force of the slider 32 on the locking block 36 is uniform; the spiral pattern 10 provides a threaded connection basis for the subsequent installation of the fastening cap 12, and the fastening cap 12 can be detached and installed through the threaded engagement, providing a secondary locking guarantee for the cylindrical pin 1 and the connecting piece 5.

[0035] Please see Figure 3-4 Specifically, the surfaces of the two connectors 5 are fixedly connected to limit rings 11, and fastening caps 12 are slidably connected between the two limit rings 11. The inner walls of the two fastening caps 12 are threadedly connected to the spiral pattern 10, and anti-slip grooves 13 are provided on the surfaces of the two fastening caps 12.

[0036] The effects achieved by the above components are as follows: by setting the limiting ring 11 to limit the sliding range of the fastening cap 12, the fastening cap 12 is prevented from moving excessively during installation or use; the fastening cap 12 is connected to the spiral thread 10 to clamp and fix the connecting piece 5 on the cylindrical pin 1, forming a secondary locking, which, together with the anti-drop component 3, achieves a double anti-drop effect; the anti-slip groove 13 increases the friction between the hand and the fastening cap 12, making it convenient for workers to tighten the fastening cap 12 for installation or disassembly operations.

[0037] Working principle: By setting the anti-drop component 3, the slider 32 of the anti-drop component 3 slides along the slide groove 31. The compression spring 33 provides the restoring force. The slider 32 presses the locking block 36 through the rounded corner surface, so that the locking block 36 compresses the restoring spring 35 and is put into the storage groove 34 or pops out. The popped-out locking block 36 is locked into the locking groove 6 of the connector 5 to form a preliminary lock. The anti-slip pad 7 increases the friction and prevents the locking block 36 from loosening, solving the problem of single locking and easy drop in the existing device. The slider 9 cooperates with the slide groove 31 to ensure that the slider 32 slides smoothly and avoids deviation that affects the locking effect. The guide block 4 of the cylindrical pin 1 slides and engages with the guide groove 8 of the connector 5 to achieve precise installation. The guide mechanism avoids misalignment and improves assembly efficiency. The spiral pattern 10 on the surface of the cylindrical pin 1 is threaded to the fastening cap 12. The fastening cap 12 slides between the limiting rings 11, clamping the connector 5 to form a secondary lock. Together with the anti-drop component 3, it forms a double anti-drop guarantee, further improving stability. The anti-slip groove 13 makes it easy to manually tighten the fastening cap 12 without special tools, simplifying installation and disassembly. The eight storage slots 34 are grouped in fours to fit the locking slots 6 on both sides of the connector 5, ensuring even distribution of locking force. It is compatible with connectors of different specifications, expanding the scope of application. Overall, it improves the reliability, ease of installation, and adaptability of the cylindrical pin locking mechanism, meeting the connection needs of various mechanical systems.

[0038] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A locking structure for preventing the cylindrical pin from falling off, comprising a cylindrical pin (1), a pin hole (2), and an anti-fall-off component (3), characterized in that: The cylindrical pin (1) has a pin hole (2) inside, and the inner wall of the pin hole (2) is provided with an anti-drop component (3). The anti-fall-off component (3) includes a sliding groove (31) opened in the top and bottom walls of the pin hole (2). A sliding member (32) is slidably connected to the inner wall of the sliding groove (31). A compression spring (33) is fixedly connected between two sliding members (32). A storage groove (34) is opened on the inner side wall of the pin hole (2). A return spring (35) is fixedly connected to the inner wall of eight storage grooves (34). A locking block (36) is fixedly connected to one end of the return spring (35). The surfaces of the sliding member (32) and the locking block (36) are rounded. The surfaces of the sliding member (32) and the locking block (36) can abut against each other.

2. The anti-loosening locking structure for a cylindrical pin according to claim 1, characterized in that: Guide blocks (4) are fixedly connected to the inner walls of the two ends of the cylindrical pin (1), and connectors (5) are inserted and connected to both ends of the cylindrical pin (1).

3. The anti-loosening locking structure for a cylindrical pin according to claim 2, characterized in that: The eight storage slots (34) are divided into four groups on one side, and two locking slots (6) are opened on both sides of the surfaces of the two connectors (5).

4. The anti-loosening locking structure for a cylindrical pin according to claim 3, characterized in that: The inner walls of the eight locking grooves (6) are fixedly connected with anti-slip pads (7), and the middle of the surfaces of the two connectors (5) are provided with guide grooves (8).

5. The anti-loosening locking structure for a cylindrical pin according to claim 2, characterized in that: The surface of the guide block (4) is slidably and locked to the guide groove (8), and the top and bottom of the two sliders (32) are fixedly connected to sliders (9).

6. The anti-loosening locking structure for a cylindrical pin according to claim 5, characterized in that: The surfaces of the four sliders (9) are slidably connected to the inner wall of the groove (31), and the two ends of the cylindrical pin (1) are provided with spiral patterns (10).

7. The anti-loosening locking structure for a cylindrical pin according to claim 2, characterized in that: Limiting rings (11) are fixedly connected to the surfaces of the two connectors (5), and fastening caps (12) are slidably connected between the two limiting rings (11). The inner walls of the two fastening caps (12) are threadedly connected to the spiral pattern (10), and anti-slip grooves (13) are provided on the surfaces of the two fastening caps (12).

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