Cam quick lock dowel pin

Abstract

The utility model discloses a kind of cam quick locking dowel, overall square column structure, including the lock seat and the poking dowel connected by rotating shaft. The poking dowel one end is equipped with quick-lock cam, there is wave-shaped working camber on it and the end is provided with detent. The lock seat contains arc convex surface guide piece, and the guide groove on the poking dowel with arc concave surface is slidably connected, the stability of the utility model is increased. The dowel is suitable for the connection of hole component, such as the connection of square through-hole component and other components. It is realized by quick-lock cam extruding hole wall with wave-shaped working camber Quick locking and positioning adjustment, square column and square hole cooperate to prevent swing after installation, with the characteristics of simple operation, stable connection, accurate positioning, can be widely applied to mechanical connection positioning field.

Description

Technical Field

[0001] This utility model relates to the field of mechanical connection and positioning technology. Specifically, it relates to a cam quick-locking pin for realizing the rapid locking, positioning and unlocking of parts, which can effectively replace traditional bolt connections and greatly shorten assembly and disassembly time. Background Technology

[0002] In mechanical manufacturing, equipment assembly, and various fields requiring component connection and positioning, screw and nut connections have long been widely used. However, this connection method requires the use of tools such as wrenches to tighten the screws and nuts, making the operation cumbersome and time-consuming. Especially in scenarios requiring frequent component connection and disassembly, screw and nut connections require a significant amount of time for each installation and disassembly, resulting in extremely low efficiency and severely impacting production schedules. Furthermore, while some existing ordinary cam locating pins can achieve quick locking of components, they lack adjustable positioning, making it difficult to flexibly adjust the tightness according to actual needs.

[0003] Therefore, there is an urgent need for a connection and positioning device that can achieve both rapid connection and disassembly, as well as adjustable positioning, to address the shortcomings of existing connection methods and positioning pins. Summary of the Invention

[0004] This utility model aims to provide a cam-based quick-locking positioning pin, which overcomes the low efficiency of traditional screw and nut connection methods and compensates for the lack of adjustable positioning of ordinary cam positioning pins, achieving fast and convenient positioning connection and flexible positioning adjustment. The specific technical solution is as follows:

[0005] A cam-type quick-lock positioning pin includes a lock seat and a toggle positioning pin; the lock seat and the toggle positioning pin are rotatably connected by a rotating shaft; a quick-lock cam is provided at one end of the toggle positioning pin near the lock seat; when the lock seat and the toggle positioning pin are extended, they form a cylindrical structure with a uniform cross-section; the cam-type quick-lock positioning pin can fix a perforated component, and the hole of the perforated component matches the cylindrical structure.

[0006] The quick-lock cam features a wavy working surface; the radial distance between the wavy working surface and the rotation axis exhibits a step-like increasing pattern of "larger increase followed by smaller decrease." This unique surface design allows the contact state between the quick-lock cam and the connected component to continuously change during the rotation of the positioning pin, enabling adjustments to the locking force to varying degrees and automatic locking, thus meeting the requirements for adjustable positioning.

[0007] The quick-lock cam also features a protruding locking position at the end of the wavy working surface. When the locating pin rotates to a specific position, the locking position engages with a corresponding structure on the connected component, providing additional positioning and locking functions, enhancing connection stability, and providing a limiting effect during use.

[0008] The lock seat also includes a guide plate; the actuating positioning pin also includes a guide groove perpendicular to the rotation axis; the guide plate slides within the guide groove. This structural design ensures the accuracy and stability of the actuating positioning pin during rotation, eliminates wobbling of the actuating positioning pin, and enables precise positioning adjustment.

[0009] The guide plate has an arc-shaped convex surface on its side; the guide groove has an arc-shaped concave surface at its bottom; the arc-shaped convex surface and the arc-shaped concave surface slide in contact. This arc-shaped surface contact not only reduces friction during sliding, making the rotation of the positioning pin smoother, but also further enhances the stability of the connection between the two, which helps to achieve precise positioning adjustment.

[0010] The rotating shaft is fixedly mounted on the actuating positioning pin through the guide groove; the guide plate has a shaft hole that mates with the rotating shaft; the rotating shaft and the shaft hole are eccentrically positioned away from the quick-lock cam. This eccentric positioning causes the actuating positioning pin to generate a unique eccentric motion during rotation. This motion characteristic helps to achieve the function of quick locking and unlocking and increases the adjustable range of the quick-lock cam.

[0011] The toggle locating pin has a cylindrical toggle handle at the end furthest from the quick-lock cam. This toggle handle allows users to operate the locating pin directly by hand, eliminating the need for additional tools and significantly increasing the speed of connection and disassembly, enabling rapid operation.

[0012] Depending on the application scenario, in one embodiment, the lock seat further includes a cuboid base fixed to the component that needs to connect with the perforated component. When the lock seat and the actuating positioning pin are extended, the entire structure forms a cuboid with a uniform cross-section. The hole in the perforated component is rectangular, matching the cross-section of the cuboid column structure. By firmly fixing the base to a component, a stable mounting base is provided for the entire cam quick-lock positioning pin. The cooperation between the cuboid positioning pin and the square through hole utilizes the limiting characteristics of the square structure to prevent the positioning pin from rotating within the hole, thereby preventing component swaying.

[0013] In another embodiment, the lock seat has an axisymmetric structure, with two sets of actuating positioning pins symmetrically arranged on both sides. The symmetrical arrangement of the two sets of actuating positioning pins allows for a more uniform distribution of locking force, further improving the reliability and stability of positioning, and also providing a more balanced adjustment basis for positioning adjustments.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. Quick Operation: The device features a toggle handle, allowing users to manually operate the positioning pin for quick installation and disassembly. Compared to traditional screw and nut connections, it eliminates the need for tools, significantly improving work efficiency and meeting the needs of frequent connection and disassembly scenarios.

[0016] Adjustable positioning: The wave-shaped working surface design of the quick-lock cam allows it to provide different levels of locking force during rotation, enabling flexible adjustment of positioning and automatic locking. This overcomes the shortcomings of ordinary cam positioning pins, which cannot be adjusted. The position of components can be precisely adjusted according to actual needs, improving the adaptability of the equipment and the flexibility of production.

[0017] Stable connection: The locking position at the end of the quick-lock cam and the cooperation between the guide plate and the guide groove, including the sliding cooperation between the arc-shaped convex surface and the arc-shaped concave surface, ensure the stability of the connection, prevent loosening during use, and ensure accurate positioning between components. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the usage state of Embodiment 1 of this utility model.

[0019] Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model.

[0020] Figure 3 This is a schematic diagram of the lock seat in Embodiment 1 of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the toggle positioning pin in this utility model.

[0022] Figure 5 This is a cross-sectional structural diagram of the toggle positioning pin in this utility model.

[0023] Figure 6 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model.

[0024] Figure 7 This is a schematic diagram of the lock seat in Embodiment 2 of this utility model.

[0025] Figure 8 This is a schematic diagram of the usage state of Embodiment 2 of this utility model. Detailed Implementation

[0026] Example 1

[0027] Application scenarios and structural features:

[0028] This embodiment is applicable to connection scenarios where one component has no through hole and the other component has a through hole.

[0029] like Figure 1-5 As shown, a cam quick-lock positioning pin has an overall rectangular structure, consisting of a lock seat 1 and a toggle positioning pin 2. The lock seat 1 includes a base 11 and a guide plate 12; the toggle positioning pin 2 has a guide groove 22, a quick-lock cam 23, and a toggle handle 21; the quick-lock cam 23 is located at one corner near the lock seat 1, and has a wavy working surface and a locking position 24 at the end; the radial distance between the wavy working surface and the rotating shaft 25 exhibits a step-like increasing trend of "larger increase - smaller decrease". The guide plate 12 is disposed in the guide groove 22 and slides in cooperation with it, and the arc-shaped convex surface 13 on the side of the guide plate 12 slides in cooperation with the arc-shaped concave surface 26 at the bottom of the guide groove 22. The rotating shaft 25 passes eccentrically through the shaft hole 14 of the guide plate 12 on the side away from the quick-lock cam 23 and is fixed on the toggle positioning pin 2. The axial direction of the rotating shaft 25 is perpendicular to the guide plate 12. The actuating positioning pin 2 is fixed to the component without a through hole via the base 11. When the lock seat 1 and the actuating positioning pin 2 are extended, they form a rectangular structure with a uniform cross-section. The hole on the through hole component is a square hole that matches the rectangular structure, allowing the actuating positioning pin 2 to pass smoothly into the outer periphery of the base 11. The square hole helps prevent wobbling after installation.

[0030] Installation and usage:

[0031] The base 11 of the lock seat 1 is firmly fixed to the surface of the component without through holes by welding. The assembled toggle positioning pin 2 is rotatably connected to the lock seat 1 via the rotating shaft 25, and the guide plate 12 can slide flexibly in the guide groove 22.

[0032] When connecting a component with a square through-hole, the locating pin 2 extends, forming a rectangular structure with a uniform cross-section. The component's square through-hole is aligned with the locating pin 2 and inserted, passing through the pin and into the outer periphery of the base 11. The lever 21 is then held, causing the quick-lock cam 23 to rotate outwards. The wavy working surface of the quick-lock cam 23 initially contacts the inner wall of the square through-hole. As it rotates, the locking force gradually increases step by step until the required locking force is reached. At this point, the wavy working surface of the quick-lock cam 23 forms a self-locking mechanism, achieving a tight lock. Because the rectangular locating pin engages with the square through-hole, and the base 11 also engages with the square through-hole, it effectively prevents the component from wobbling after installation, ensuring a stable connection and precise positioning between the two components.

[0033] To disassemble, hold the lever 21 and rotate it in the opposite direction to disengage the quick-lock cam 23 from the inner wall of the square through hole, thus separating the two parts.

[0034] Design Principles and Technical Effects: The wavy working surface of the quick-lock cam 23 adjusts the locking force by changing the contact pressure with the inner wall of the square through hole through rotation. The radial distance between the wavy working surface and the rotating shaft 25 exhibits a step-like increasing trend of "larger increase - smaller decrease," with the smaller decrease contributing to the self-locking effect during adjustment. The locking position 24 provides a limit to prevent the quick-lock cam 23 from excessively rotating and disengaging. The sliding fit between the guide plate 12 and the guide groove 22, and the sliding fit between the arc-shaped convex surface 13 and the arc-shaped concave surface 26, ensure the smoothness and accuracy of the rotation of the positioning pin 2, thereby achieving precise positioning adjustment and increasing the stability of the two connected components. The fit between the cuboid positioning pin and the square through hole utilizes the limiting characteristics of the square structure to prevent the positioning pin from rotating within the hole, thus preventing component wobbling.

[0035] Example 2

[0036] Application scenarios and structural features:

[0037] This embodiment addresses the connection of two components, both of which have square through holes.

[0038] like Figure 6-8 As shown, a cam quick-locking positioning pin has a locking seat 1 with an axisymmetric structure and two sets of actuating positioning pins 2 symmetrically arranged on both sides. When the two sets of actuating positioning pins 2 on both sides are extended, the entire cam quick-locking positioning pin has a cuboid structure.

[0039] The other components are the same as in Embodiment 1. This structural design allows the positioning pin to pass through the square through holes of the two components and be positioned on both sides of the through holes, effectively preventing the components from swinging after installation.

[0040] Installation and usage:

[0041] Ensure that the rotating shaft 25 rotates and connects the locating pin 2 to the lock seat 1, and that the guide plate 12 and the guide groove 22 cooperate normally.

[0042] First, align the square holes of the two components to be connected. Extend the cam quick-lock pin, which has a cuboid structure. Pass the cam quick-lock pin through the square holes of the two components, and simultaneously hold the actuating handles 21 on both sides to rotate the quick-lock cam 23 outwards. The two sets of quick-lock cams 23 contact the inner walls of the square through holes of the two components respectively. As they rotate, the locking force increases synchronously, achieving rapid positioning and locking of the two components.

[0043] During disassembly, simultaneously rotate the toggle handles 21 on both sides in opposite directions to disengage the quick-lock cam 23 from the inner wall of the square through hole of the component. Pull out the quick-lock pin of the cam to easily separate the two components.

[0044] Design Principles and Technical Effects: Based on the positioning and locking principle of Embodiment 1, by symmetrically setting the toggle positioning pins 2 on both sides of the lock base 1, the locking force is evenly applied to both sides of the square through holes of the two components using the symmetrical structure. This design provides an efficient and stable solution for connecting two components with square through holes of the same size, eliminating the need for welding and fixing the lock base 1. At the same time, the operation process is simple and convenient, greatly improving assembly efficiency.

[0045] The above-described embodiments only illustrate two implementation methods of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A cam quick-locking positioning pin, characterized in that, It includes a lock seat (1) and a toggle positioning pin (2); the lock seat (1) and the toggle positioning pin (2) are rotatably connected by a rotating shaft (25); a quick-lock cam (23) is provided at one end of the toggle positioning pin (2) near the lock seat (1); when the lock seat (1) and the toggle positioning pin (2) are extended, they form a columnar structure with a uniform cross-section; the cam quick-lock positioning pin can fix the perforated component, and the hole of the perforated component matches the columnar structure.

2. A cam quick-locking positioning pin according to claim 1, characterized in that, The quick-lock cam (23) is provided with a wave-shaped working surface; the radial distance between the wave-shaped working surface and the rotating shaft (25) is in a step-increasing trend of "larger increase - smaller decrease".

3. A cam quick-locking positioning pin according to claim 2, characterized in that, The quick-lock cam (23) is also provided with a protruding locking position (24) at the end of the wavy working surface.

4. A cam quick-locking positioning pin according to claim 1, characterized in that, The lock seat (1) also includes a guide plate (12); the actuating positioning pin (2) also includes a guide groove (22) perpendicular to the rotation axis (25); the guide plate (12) slides in the guide groove (22).

5. A cam quick-locking positioning pin according to claim 4, characterized in that, The guide plate (12) has an arc-shaped convex surface (13) on its side; the guide groove (22) has an arc-shaped concave surface (26) at its bottom; the arc-shaped convex surface (13) and the arc-shaped concave surface (26) slide together.

6. A cam quick-locking positioning pin according to claim 4, characterized in that, The rotating shaft (25) passes through the guide groove (22) and is fixedly mounted on the locating pin (2); the guide plate (12) is provided with a shaft hole (14) that mates with the rotating shaft (25). The rotating shaft (25) and the shaft hole (14) are eccentrically positioned on the side away from the quick-lock cam (23).

7. A cam quick-locking positioning pin according to claim 4, characterized in that, The toggle positioning pin (2) has a columnar toggle handle (21) at the end away from the quick-lock cam (23).

8. A cam quick-locking pin according to any one of claims 1-7, characterized in that, The lock seat (1) also includes a cuboid base (11), which is fixed on the component that needs to be connected to the perforated component. When the lock seat (1) and the toggle positioning pin (2) are extended, the whole has a cuboid structure with a uniform cross-section. The hole of the perforated component is rectangular and matches the cross-section of the cuboid column structure.

9. A cam quick-locking pin according to any one of claims 1-7, characterized in that, The lock seat (1) has an axisymmetric structure, and two sets of the toggle positioning pins (2) are symmetrically arranged on both sides of the lock seat (1).

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