Quick-release self-locking anti-loose lock

Abstract

The present application belongs to the technical field of mechanical connection, and relates to a quick-release self-locking anti-loosening lock, which comprises an inner core, a tight sleeve, a locking outer ring and a release button. The inner core is sleeved on a locking shaft and is a C-shaped pipe with a horn-shaped structure with a small upper end and a large lower end. The upper end of the inner core extends radially outward to form an upper limiting ring. The tight sleeve is sleeved on the inner core and can move along the axial direction of the inner core, so that the state of the inner core on the locking shaft is switched between a free movement state and a locking state. The tight sleeve is provided with a spiral groove. The locking outer ring is sleeved on the tight sleeve and can rotate relative to the tight sleeve. The locking outer ring is provided with a through hole opened in the radial direction thereof. The release button comprises a plug rod. The plug rod passes through the through hole, and the length of the plug rod exposed from the inner end of the through hole is adjustable. When the length of the plug rod exposed from the inner end of the through hole reaches the maximum, the plug rod is inserted into the spiral groove. When the length of the plug rod exposed reaches the minimum, the plug rod is separated from the spiral groove. The present application can realize quick self-locking and rapid release, and has the performance of anti-vibration release.

Description

Technical Field

[0001] This invention belongs to the field of mechanical connection technology and relates to a quick-release self-locking anti-loosening locking device. Background Technology

[0002] In the field of mechanical connections, locking devices are commonly used fastening components and are widely used in various mechanical equipment, transportation vehicles and other products. They not only need to have stable locking performance to prevent the connection parts from loosening under working conditions such as vibration and impact, but also need to take into account the convenience of disassembly and assembly in order to improve the efficiency of equipment assembly and maintenance.

[0003] Currently, most mainstream quick-release self-locking anti-loosening locking devices are designed with threads as the core. Among them, patent CN219539276U adopts an open-type clamp design, while patents CN108843673B, CN218031020U, and CN108953350B all adopt a separate threaded block design. Patent CN110273911B is also a separate threaded block design with added limiting components. These devices rely on thread engagement to achieve locking, and the limiting is also accomplished through the thread structure. Even with the addition of limiting components, the disassembly process still requires loosening the threads, which is laborious and cumbersome, and cannot achieve true quick disassembly or rapid loosening. At the same time, the anti-loosening effect of this type of device relies on the friction of the threads or washers, which is prone to loosening under vibration conditions, and cannot achieve stable anti-loosening locking.

[0004] Patent CN107975106B abandons the design concept of the threaded core and realizes quick disassembly and quick assembly through the spring structure, thus getting rid of the limitations of threaded operation. However, this design can only realize convenient disassembly and assembly, but cannot achieve an effective anti-loosening and locking effect. It is very easy to loosen under vibration conditions and cannot meet the anti-loosening requirements of locking components.

[0005] Common bicycle quick-release pin wrench-type quick-release devices on the market rely on the opening and closing of a wrench to loosen and tighten. The operation depends on auxiliary parts and the steps are cumbersome. They cannot achieve threadless quick disassembly and rapid loosening, nor can they reliably prevent loosening under vibration conditions. They cannot meet the core requirements of quick disassembly and anti-loosening.

[0006] In summary, existing technologies are insufficient to meet the comprehensive requirements of rapid assembly and disassembly, rapid loosening, and stable anti-loosening in practical applications. Therefore, there is an urgent need to develop a quick-release self-locking anti-loosening locker that does not rely on threads for locking and limiting, can achieve rapid self-locking and rapid loosening, and has a reliable anti-loosening effect under vibration conditions, in order to overcome the shortcomings of existing technologies. Summary of the Invention

[0007] The purpose of this invention is to solve the problems existing in the prior art and to provide a quick-release self-locking anti-loosening locking device.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] A quick-release self-locking anti-loosening locking device for mounting on a locking shaft includes an inner core, a locking sleeve, a locking outer ring, and a release button;

[0010] The inner core is used to fit onto the locking shaft; the inner core is a C-shaped tube with a trumpet-shaped structure that is smaller at the top and larger at the bottom, and the upper end of the inner core extends radially outward to form an upper limit ring;

[0011] The tight sleeve is fitted onto the inner core and can move along the axial direction of the inner core, allowing the inner core to switch between a free-moving state and a locked state on the locking shaft (pressing down the tight sleeve ensures that the inner core and the tight sleeve fit tightly and are not easy to slip); the tight sleeve is provided with a spiral groove, and the central axis of the spiral groove coincides with the central axis of the tight sleeve.

[0012] The locking outer ring is fitted onto the tight sleeve and can rotate relative to the tight sleeve. The inner diameter of the locking outer ring is larger than the outer diameter of the tight sleeve, and the difference in size between the two can be controlled between 0.02-0.5mm. The locking outer ring is provided with a through hole opened radially thereon, and the end of the through hole located on the inner wall of the locking outer ring is the inner end.

[0013] The release button includes a rod that passes through a through hole, and the length of the rod protruding from the inside of the through hole is adjustable. The release button adopts a rotary limiting structure, and the locking device can be completely released by simply rotating the release button, making the operation quick and convenient.

[0014] When the length of the insert rod protruding from the inner end of the through hole reaches its maximum, the insert rod is inserted into the spiral groove. The spiral groove guides the insert rod to spiral upwards. When rotating to lock the outer ring, the bottom of the insert rod can slide on the inclined surface of the spiral groove, causing the tight sleeve to move downwards and the locking outer ring to move upwards. The spiral groove is equipped with limiting teeth to prevent the insert rod from spiraling downwards. This invention achieves locking through a stepped snap-fit ​​limiting method formed by the limiting teeth, which can prevent the locking device from loosening due to vibration. It is virtually non-loosening without human intervention. The principle of the stepped snap-fit ​​limiting is: when rotating to lock the outer ring, the loosening... The insert rod of the button can move upward along the limiting teeth. The limiting teeth are designed to limit the movement in one direction, so that the locking outer ring can only rotate in one direction along the insert rod in the direction of upward movement of the limiting teeth, and cannot rotate in the opposite direction. This achieves the anti-loosening effect. Each groove of the limiting teeth can lock the insert rod, thereby limiting the insertion rod from sliding down and preventing the locking from failing. Continuing to rotate the locking outer ring can drive the tight sleeve to move downward continuously until the locking outer ring can no longer be turned and the locking device is completely fixed. At this time, the lower part of the insert rod is completely limited by the limiting teeth and cannot slide down. Vibration conditions make it difficult for the locking device to loosen.

[0015] When the length of the insert rod protruding from the inner end of the through hole reaches its minimum, the insert rod leaves the spiral groove. When the insert rod leaves the spiral groove, the locking of the entire locking device fails, and the locking device can be released.

[0016] As a preferred technical solution:

[0017] As described above, the quick-release self-locking anti-loosening locking device also includes a washer and a spring washer. Both the washer and the spring washer are fitted onto the inner core and are located between the upper limit ring and the locking outer ring. The washer is located above the spring washer. When locking, the axial movement stops when the locking outer ring moves up to completely press against the washer. Continuous rotation of the locking outer ring can completely squeeze the spring washer, further improving the stability of locking.

[0018] As described above, in a quick-release self-locking anti-loosening locking device, the lower end of the tight sleeve extends radially outward to form a lower limiting ring for limiting the locking outer ring.

[0019] As described above, in a quick-release self-locking anti-loosening locking device, the lower end of the spiral groove extends upward along the axial direction of the tight sleeve to form a first linear groove. The first linear groove is used for inserting the insertion rod and can prevent the insertion rod from accidentally rotating onto the limiting teeth when not in operation.

[0020] As described above, a quick-release self-locking anti-loosening locking device has a positioning ball on the insertion rod and an L-shaped groove on the wall of the through hole for limiting the positioning ball. The positioning ball is embedded in the L-shaped groove, which is formed by first creating a second linear groove along the axial direction of the through hole from the outside to the inside, and then creating an arc-shaped groove along the circumference of the through hole towards one side of the second linear groove. The L-shaped groove includes two limiting areas, corresponding to the extended and retracted states of the insertion rod, respectively. Rotating the release button moves the positioning ball within the L-shaped groove. When the positioning ball enters the retracted area, the release button pops out, minimizing the length of the insertion rod protruding from the inside of the through hole, and disengaging the insertion rod from the screw. The spiral groove causes the entire locking device to fail to lock. When the positioning ball enters the extension rod area, the length of the insertion rod protruding from the inner end of the through hole reaches its maximum, and the insertion rod is inserted into the spiral groove, allowing the locking device to enter the working state. The second linear groove corresponds to the retracted area; when the positioning ball is located in the second linear groove, the release button automatically pops outward under the action of the spring, causing the insertion rod to leave the spiral groove, achieving quick disassembly of the locking device. The arc-shaped groove corresponds to the extension rod area; when the positioning ball is located in the arc-shaped groove, the release button is limited and cannot be pulled outward, keeping the insertion rod inserted into the spiral groove. Under vibration conditions, it is difficult for the positioning ball to disengage from the arc-shaped groove, thus achieving an anti-loosening effect.

[0021] As described above, the quick-release self-locking anti-loosening locking device also includes a pressing cap on the release button. The pressing cap is located outside the locking outer ring and is fixedly connected to the insert rod.

[0022] As described above, the quick-release self-locking anti-loosening locking device also includes a spring in the release button. The spring is sleeved on the insertion rod and is clamped by the pressing cap and the locking outer ring. The spring can apply an outward elastic force to the pressing cap. After the release button is pressed down manually, the spring can drive the release button to automatically rebound.

[0023] Beneficial effects:

[0024] (1) The present invention achieves locking and one-way limiting by the cooperation of the plug rod of the release button with the spiral groove and limiting teeth of the tight sleeve. At the same time, the locking and releasing states can be switched by adjusting the length of the plug rod exposed from the inner end of the locking outer ring through hole. It can achieve quick self-locking and rapid release without loosening the thread, greatly simplifying the disassembly and assembly operation. No additional auxiliary parts are required. Furthermore, the one-way limiting structure of the limiting teeth can form a stepped buckle limit, avoiding the loosening problem under vibration conditions. This solves the core problem that the existing technology cannot take into account both the ease of disassembly and assembly and the stability of locking and anti-loosening.

[0025] (2) The present invention achieves stable positioning of the two working states of the release button extension and retraction by cooperating with the positioning ball on the insertion rod and the L-shaped groove in the locking outer ring through hole. This ensures that the insertion rod is stably inserted into the spiral groove in the locking working state, avoiding locking failure without human intervention. It can also quickly switch to the release state by rotating the release button, further improving the reliability and convenience of the device operation.

[0026] (3) By adding a shim and a spring shim between the upper limit ring of the inner core and the locking outer ring, the present invention can further buffer the impact force under vibration conditions in the locked state, improve the fit and locking stability of each component, and further enhance the anti-loosening effect of the device. Attached Figure Description

[0027] Figure 1 and Figure 2 This is a schematic diagram of the quick-release self-locking anti-loosening locking device of the present invention; wherein, Figure 1 For assembly diagram, Figure 2 This is an exploded view;

[0028] Figure 3 This is a schematic diagram of the inner core structure;

[0029] Figure 4 This is a schematic diagram of the tight-fitting structure;

[0030] Figure 5 This is a schematic diagram of the structure for locking the outer ring; where a is the main view, b is the sectional view of DD in a, and c is a magnified view of the circle in b.

[0031] Figure 6 This is a schematic diagram of the release button.

[0032] Figures 1-6 In the middle, 1-inner core, 2-locking shaft, 3-tightening sleeve, 31-spiral groove, 32-limiting tooth, 33-first linear groove, 4-locking outer ring, 5-release button, 51-insertion rod, 52-positioning ball, 53-press cap, 54-spring, 6-upper limit ring, 7-washer, 8-spring pad, 9-lower limit ring, 10-second linear groove, 11-arc groove. Detailed Implementation

[0033] The present invention will be further described below with reference to specific embodiments.

[0034] A quick-release self-locking anti-loosening locking device, such as Figure 1 and Figure 2 As shown, it is used to install onto the locking shaft 2 and includes an inner core 1, a tight sleeve 3, a locking outer ring 4, a release button 5, a washer 7, and a spring washer 8;

[0035] like Figure 3 As shown, the inner core 1 is a C-shaped tube with a trumpet-shaped structure that is small at the top and large at the bottom. The upper end of the inner core 1 extends radially outward to form an upper limit ring 6.

[0036] Both the gasket 7 and the spring pad 8 are fitted onto the inner core 1. The gasket 7 is located below the upper limit ring 6 and above the spring pad 8.

[0037] like Figure 1 As shown, 3 is tightly fitted onto the inner core 1 and can move along the axial direction of the inner core 1;

[0038] like Figure 2 and Figure 4 As shown, the tight sleeve 3 is provided with a spiral groove 31; the central axis of the spiral groove 31 coincides with the central axis of the tight sleeve 3, the spiral groove 31 is provided with a limiting tooth 32, and the lower end of the spiral groove 31 extends upward along the axial direction of the tight sleeve 3 to form a first linear groove 33.

[0039] like Figure 1 and Figure 5 As shown, the locking outer ring 4 is fitted on the tight sleeve 3 and can rotate relative to the tight sleeve 3. The locking outer ring 4 is provided with a through hole opened radially thereon. The wall of the through hole is provided with an L-shaped groove. The L-shaped groove is formed by first opening a second linear groove 10 from the outside to the inside along the axial direction of the through hole, and then opening an arc-shaped groove 11 along the circumference of the through hole to one side of the second linear groove 10. The end of the through hole located on the inner wall of the locking outer ring 4 is the inner end.

[0040] like Figure 1 and Figure 4 As shown, the locking outer ring 4 is located below the spring pad 8, and the lower end of the tight sleeve 3 extends radially outward to form a lower limiting ring 9 for limiting the locking outer ring 4.

[0041] like Figure 1 and Figure 6 As shown, the release button 5 includes a rod 51, a pressing cap 53, and a spring 54;

[0042] The insertion rod 51 passes through the through hole, and a positioning ball 52 is provided on the insertion rod 51. The positioning ball 52 is embedded in the L-shaped groove.

[0043] The pressing cap 53 is located outside the locking outer ring 4 and is fixedly connected to the insert rod 51;

[0044] Spring 54 is fitted onto insert rod 51 and held together by pressing cap 53 and locking outer ring 4; when the spring is compressed and stored, positioning ball 52 is located in arc-shaped groove 11, the length of insert rod 51 protruding from the inner end of through hole reaches its maximum, and insert rod 51 is inserted into spiral groove 31; when the spring rebounds and releases, positioning ball 52 is located in second linear groove 10, the length of insert rod 51 protruding from the inner end of through hole reaches its minimum, and insert rod 51 leaves spiral groove 31.

[0045] The usage process of this quick-release self-locking anti-loosening locking device is as follows:

[0046] ① Place the inner core onto the locking shaft and press down on the tight sleeve to make the inner core and the tight sleeve fit tightly together. At this time, the positioning ball is in the second linear groove by default.

[0047] ② Press and rotate the release button to move the positioning ball from the second linear groove to the arc groove. At this time, the length of the insert rod protruding from the inside of the through hole reaches its maximum. The insert rod is inserted into the first linear groove at the lower end of the spiral groove to prevent the insert rod from accidentally rotating to the spiral section with limiting teeth.

[0048] ③ Rotate the locking outer ring to allow the insert rod to slide from the first linear groove into the spiral section of the spiral groove. The spiral groove guides the insert rod to spiral upward, driving the tight sleeve to move downward along the axial direction of the inner core, squeezing the inner core and causing it to switch from a free-moving state to a locked state, thus gripping the locking shaft. During this process, the limiting teeth form a one-way limit on the insert rod, preventing the insert rod from spiraling downward and avoiding the locking outer ring from rotating back and loosening. Continue to rotate the locking outer ring until it can no longer rotate, completing the self-locking process.

[0049] ④ Rotate the release button to move the positioning ball from the arc-shaped groove to the second linear groove. The spring rebounds and drives the insert rod to retract to the outside of the through hole. At this time, the length of the insert rod protruding from the inside of the through hole reaches its minimum and it is completely disengaged from the spiral groove. The inner core switches from the locked state to the free-moving state, and the locking device can be removed from the locking shaft to complete the disassembly.

[0050] It should be understood that the specific embodiments described above are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A quick-release self-locking anti-loosening locking device, used for installation on a locking shaft (2), characterized in that, It includes an inner core (1), a tight sleeve (3), a locking outer ring (4), and a release button (5); The inner core (1) is used to fit on the locking shaft (2); the inner core (1) is a C-shaped tube with a trumpet-shaped structure that is small at the top and large at the bottom, and the upper end of the inner core (1) extends outward in the radial direction to form an upper limit ring (6). The tight sleeve (3) is fitted on the inner core (1) and can move along the axial direction of the inner core (1), so that the state of the inner core (1) on the locking shaft (2) can switch between a free movement state and a locked state; the tight sleeve (3) is provided with a spiral groove (31), and the central axis of the spiral groove (31) coincides with the central axis of the tight sleeve (3); The locking outer ring (4) is fitted on the tight sleeve (3) and can rotate relative to the tight sleeve (3). The locking outer ring (4) is provided with a through hole opened radially thereon. The end of the through hole located on the inner wall of the locking outer ring (4) is the inner end. The release button (5) includes a plunger (51), a pressing cap (53), and a spring (54); The insertion rod (51) passes through the through hole, and the length of the insertion rod (51) protruding from the inner end of the through hole is adjustable; When the length of the insert rod (51) protruding from the inner end of the through hole reaches its maximum, the insert rod (51) is inserted into the spiral groove (31). The spiral groove (31) is used to guide the insert rod (51) to spiral upward. The spiral groove (31) is provided with a limiting tooth (32) to prevent the insert rod (51) from spiraling downward. When the length of the insert (51) protruding from the inner end of the through hole reaches its minimum, the insert (51) leaves the spiral groove (31). The lower end of the spiral groove (31) extends upward along the axial direction of the tight sleeve (3) to form a first linear groove (33), which is used for the insertion of the insertion rod (51); The insertion rod (51) is provided with a positioning ball (52), and the wall of the through hole is provided with an L-shaped groove for limiting the positioning ball (52). The positioning ball (52) is embedded in the L-shaped groove. The L-shaped groove is formed by first opening a second linear groove (10) from the outside to the inside along the axial direction of the through hole, and then opening an arc-shaped groove (11) along the circumference of the through hole to one side of the second linear groove (10). The pressing cap (53) is located outside the locking outer ring (4) and is fixedly connected to the insert (51); The spring (54) is fitted onto the insert (51) and is held together by the pressing cap (53) and the locking outer ring (4).

2. The quick-release self-locking anti-loosening locking device according to claim 1, characterized in that, The quick-release self-locking anti-loosening lock also includes a washer (7) and a spring washer (8). Both the washer (7) and the spring washer (8) are fitted on the inner core (1) and are located between the upper limit ring (6) and the locking outer ring (4). The washer (7) is located above the spring washer (8).

3. The quick-release self-locking anti-loosening locking device according to claim 1, characterized in that, The lower end of the tight sleeve (3) extends radially outward to form a lower limiting ring (9) for limiting the locking outer ring (4).

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