Conical surface positioning quick-release lock

Abstract

The utility model relates to a kind of taper positioning quick-release lock including upper lock body and lower lock body.Liner is fixed in the counterbore of interlayer plate, the top surface of liner is the first taper surface structure matched with counterbore, stop cup coaxially nests in the bottom of liner, radial flange is provided on the top of stop cup and is connected with the inner wall of liner, cavity for accommodating lock pin and spring is provided in stop cup.The first positioning taper surface of liner is matched with the counterbore of interlayer plate to realize the unity of positioning reference, stop cup is coaxially nested in the bottom of liner and is connected with the inner wall of liner by radial flange at the same time, the assembly interface of split positioning seat and spring seat is eliminated, the coaxiality deviation of spring cavity axis and liner taper reference axis is reduced, so that the inclination of lock pin caused by pre-tightening force bias is avoided, the spring compression force is uniformly applied to the axial of pin, the contact pressure distribution consistency of pin and locking groove under locked state is ensured, the vibration displacement of lock body is reduced, and the accurate positioning accuracy after repeated locking of aircraft is satisfied.

Description

Technical Field

[0001] This utility model relates to the field of quick-release connection technology for sandwich structures, and in particular to a conical positioning quick-release lock. Background Technology

[0002] In the aerospace field, existing quick-release locks generally adopt a split positioning seat and spring seat design for the connection of the cover. The positioning seat is independently installed in the countersunk hole of the sandwich plate, while the spring seat is connected to the positioning seat by threads or buckles. This structure leads to cumulative assembly errors between the positioning reference surface and the spring bearing surface, resulting in uneven distribution of the tightening preload and micro-displacement problems under vibration environment. It cannot meet the stringent requirements of aircraft for positioning accuracy and repeatability of locking.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model discloses a conical positioning quick-release lock to solve the problem of uneven distribution of tightening preload and micro-displacement under vibration conditions caused by the cumulative assembly error between the positioning reference surface and the spring bearing surface.

[0005] The technical solution adopted in this utility model is as follows: A conical positioning quick-release lock, characterized in that it comprises: The locking body includes a locking pin, a spring, a liner, a stop cup, and a pin. The liner is fixed in a countersunk hole in the sandwich plate, and the top surface of the liner has a first conical surface structure that matches the countersunk hole. The spring is sleeved on the locking pin. The stop cup is coaxially nested in the bottom of the liner, and the top of the stop cup has a radial flange that engages with the inner wall of the liner. The stop cup has a cavity that accommodates the locking pin and the spring. The bottom end of the locking pin extends into the cavity, and the pin passes through the bottom end of the locking pin and extends out of the locking pin at both ends. The lower locking body has its top end connected to the bottom end of the interlayer plate. The lower locking body has an axial through hole. The liner plate passes through the interlayer plate and partially extends into the first through hole. The bottom end of the first through hole has a locking section. The left and right sides of the locking section have axial through grooves. The front and rear sides of the locking section have locking grooves that can engage the two ends of the pin. When the pin is rotated, it moves from the through groove to the locking groove, the spring is compressed, and the pin is engaged in the locking groove.

[0006] A further technical solution is that the sandwich panel includes an upper plate and a lower plate, the countersunk hole includes a second through hole in the upper plate and a third through hole in the lower plate, a first positioning cone surface is coaxially formed at the top of the second through hole, the liner is disposed in the second through hole, and the first cone surface structure fits the first positioning cone surface.

[0007] A further technical solution is that a receiving groove is formed at the bottom of the second through hole, a retaining ring is sleeved on the outside of the liner, the liner is disposed in the second through hole, and the retaining ring is engaged in the receiving groove.

[0008] A further technical solution is that the top end of the lower lock body extends into the second through hole, the bottom surface of the liner is a second conical structure, a second positioning conical surface is coaxially formed on the inner side of the top end of the first through hole, the liner part enters into the second through hole, and the second conical structure fits the second positioning conical surface.

[0009] A further technical solution is that the left and right sides of the top of the lower lock body are riveted to the bottom of the lower interlayer plate.

[0010] A further technical solution is that the bottom end of the head of the locking pin is provided with a clamping part, the outer diameter of the clamping part is larger than the inner diameter of the spring, and the top end of the spring abuts against the top end of the clamping part.

[0011] A further technical solution is that the inner wall of the locking section is provided with a spiral inclined surface that matches the circumferential movement trajectory of the pin. The end of the spiral inclined surface near the sandwich plate is connected to the through groove, and the end of the spiral inclined surface away from the sandwich plate is connected to the locking groove. In this process, the rotating pin slides from the through groove along the spiral inclined surface to the locking groove, the spring is compressed, and the pin is engaged in the locking groove.

[0012] A further technical solution is that the bottom of the locking groove has an arc-shaped recess, and part of the pin is inserted into the recess.

[0013] The beneficial effects of this utility model embodiment are as follows: (I) A conical positioning quick-release lock includes an upper lock body and a lower lock body. A liner is fixed in a countersunk hole in a sandwich plate. The top surface of the liner is a first conical structure that matches the countersunk hole. A stop cup is coaxially nested in the bottom of the liner. The top of the stop cup has a radial flange that engages with the inner wall of the liner. The stop cup has a cavity for accommodating the lock pin and the spring. The matching of the first positioning conical surface of the liner with the countersunk hole of the sandwich plate achieves a unified positioning reference. At the same time, by using the coaxial nesting of the stop cup in the bottom of the liner and engaging with the inner wall of the liner through the radial flange, the assembly interface between the split positioning seat and the spring seat is eliminated, reducing the coaxiality deviation between the spring cavity axis and the reference axis of the liner conical surface. This avoids the lock pin tilting caused by the preload bias, and ensures that the spring compression force is evenly applied to the pin axial direction. This ensures the consistency of the contact pressure distribution between the pin and the locking groove in the locked state, reduces the vibration displacement of the lock body, and meets the precise positioning accuracy required after repeated locking of the aircraft.

[0014] (ii) Furthermore, a receiving groove is formed at the bottom of the second through hole, and a retaining ring is fitted on the outside of the liner. The liner is located in the countersunk hole, and the retaining ring is engaged in the receiving groove. The design of the retaining ring engaging in the receiving groove of the lower plate forms a mechanical limit through the retaining ring in the pre-assembled state, preventing the upper locking body from accidentally coming out of the countersunk hole of the sandwich plate when not locked, thus ensuring the reliability of installation.

[0015] (iii) Furthermore, the top of the lower lock body extends into the second through hole, the bottom surface of the liner plate is a second conical surface structure, and a second positioning conical surface is coaxially formed at the top of the second through hole. The liner plate portion enters the first through hole, and the second conical surface structure fits into the second positioning conical surface. Through the precise fit between the second conical surface at the bottom of the liner plate and the second positioning conical surface of the lower lock body, a positioning reference is formed before locking, reducing the coaxiality error between the pin axis and the spiral inclined surface axis of the lower lock body. Attached Figure Description

[0016] Figure 1 This is a front view structural diagram of the upper lock body in a countersunk quick-release lock connector of this utility model.

[0017] Figure 2 This is a bottom view of the lower lock body in a countersunk quick-release lock connector according to this utility model.

[0018] Figure 3 This is a front view structural diagram of the lower lock body in a countersunk quick-release lock connector of this utility model.

[0019] Figure 4 This is a schematic diagram of the pre-installation structure of a countersunk quick-release lock connector according to the present invention.

[0020] Figure 5 This is a schematic diagram of the locking structure of a countersunk quick-release lock connector according to the present invention.

[0021] In the picture: 100. Upper locking body; 110. Locking pin; 111. Tightening part; 120. Spring; 130. Liner plate; 131. First conical structure; 132. Second conical structure; 140. Stop cup; 141. Radial flange; 142. Cavity; 150. Pin; 200. Lower locking body; 201. First through hole; 202. Tightening section; 203. Through groove; 204. Locking groove; 205. Spiral inclined surface; 206. Recess; 207. Second positioning conical surface; 300. Interlayer plate; 310. Countersunk hole; 311. Second through hole; 312. Third through hole; 313. First positioning conical surface; 314. Receiving groove; 320. Upper plate; 330. Lower plate. Detailed Implementation

[0022] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0023] First embodiment: A conical positioning quick-release lock includes an upper locking body 100 and a lower locking body 200.

[0024] like Figures 1-5 As shown, the upper locking body 100 includes a locking pin 110, a spring 120, a bushing 130, a stop cup 140, and a pin 150. The bushing 130 is fixed in the countersunk hole 310 of the interlayer plate 300, and the top surface of the bushing 130 is a first conical surface structure 131 that matches the countersunk hole 310. The spring 120 is sleeved on the locking pin 110. The stop cup 140 is coaxially nested in the bottom of the bushing 130, and the top of the stop cup 140 is provided with a radial flange 141 that engages with the inner wall of the bushing 130. The stop cup 140 has a cavity 142 inside to accommodate the locking pin 110 and the spring 120. For example, the bottom end of the head of the locking pin 110 is provided with a pressing part 111, the outer diameter of the pressing part 111 is larger than the inner diameter of the spring 120, and the top end of the spring 120 abuts against the top end of the pressing part 111. The bottom end of the locking pin 110 extends into the cavity 142, and the pin 150 passes through the bottom end of the locking pin 110 and extends out of the locking pin 110 at both ends. For example, the sandwich panel 300 includes an upper panel 320 and a lower panel 330. The countersunk hole 310 includes a second through hole 311 provided in the upper panel 320 and a third through hole 312 provided in the lower panel 330. A first positioning cone surface 313 is coaxially formed at the top end of the second through hole 311. The liner 130 is provided in the second through hole 311, and the first cone surface structure 131 fits against the first positioning cone surface 313.

[0025] like Figures 1-5As shown, the top end of the lower lock body 200 is connected to the bottom end of the interlayer plate 300. For example, the left and right sides of the top end of the lower lock body 200 are riveted to the bottom end of the lower interlayer plate 300. The lower lock body 200 has an axially extending first through hole 201, and the liner plate penetrates the interlayer plate 300 and partially extends into the first through hole 201. The bottom end of the first through hole 201 has a locking section 202, and the left and right sides of the locking section 202 have axial through grooves 203. The front and rear sides of the locking section 202 have locking grooves 204 that can engage the ends of the pin 150.

[0026] In this process, the rotating pin 150 moves from the through groove 203 to the locking groove 204, the spring 120 is compressed, and the pin 150 is engaged in the locking groove 204.

[0027] like Figure 4 As shown, furthermore, a receiving groove 314 is formed at the bottom end of the second through hole 311, and a retaining ring is fitted on the outside of the liner 130. The liner 130 is located inside the second through hole 311, and the retaining ring is engaged in the receiving groove 314. The design of the retaining ring engaging in the receiving groove 314 of the lower plate 330 provides a mechanical limit in the pre-assembled state, preventing the upper locking body 100 from accidentally coming out of the countersunk hole 310 of the interlayer plate 300 when not locked, thus ensuring installation reliability.

[0028] like Figure 4 As shown, further, the top end of the lower lock body 200 extends into the third through hole 312, the bottom surface of the liner 130 is a second conical structure 132, and a second positioning conical surface 207 is coaxially formed on the inner side of the top end of the first through hole 201. The liner 130 partially enters the second through hole 311, and the second conical structure 132 fits against the second positioning conical surface 207. Through the precise fit between the second conical surface at the bottom of the liner 130 and the second positioning conical surface 207 of the lower lock body 200, a positioning reference is formed before locking, reducing the coaxiality error between the axis of the pin 150 and the axis of the spiral inclined surface 205 of the lower lock body 200.

[0029] like Figures 1-5 As shown, further, the inner wall of the locking section 202 is provided with a spiral inclined surface 205 that matches the circumferential movement trajectory of the pin 150. One end of the spiral inclined surface 205 near the interlayer plate 300 connects to the through groove 203, and the other end away from the interlayer plate 300 connects to the locking groove 204. The rotating pin 150 slides from the through groove 203 along the spiral inclined surface 205 to the locking groove 204, compressing the spring 120, and the pin 150 is engaged within the locking groove 204. During installation, after inserting the pin 150 into the pin hole at the through groove 203, only the locking pin 110 needs to be rotated. The pin 150 slides along the spiral inclined surface 205, which provides a rotational guide path for the pin 150, simplifying the locking action to a single rotational action. This makes installation easier, reduces operational difficulty, and improves installation efficiency.

[0030] like Figure 2 As shown, the bottom of the locking groove 204 is provided with an arc-shaped recess 206, into which part of the pin 150 is inserted. When the pin 150 is inserted into the locking groove 204, the cylindrical surface of the pin 150 can be partially embedded and tightly fitted into the arc surface of the recess 206, increasing the effective contact area between the pin 150 and the groove. This not only improves the stability of the locking and prevents the pin 150 from fretting or axially moving under vibration, but also enhances the reliability and anti-loosening ability of the locking state.

[0031] In operation, this embodiment is as follows: When the liner 130 is installed in the countersunk hole 310 of the interlayer plate 300, the first conical surface structure 131 at the top of the liner 130 fits tightly against the first positioning conical surface 313 of the countersunk hole 310 of the upper layer plate 320 to form an initial positioning reference. At the same time, the retaining ring on the outside of the liner 130 is inserted into the receiving groove 314 of the lower layer plate 330 to prevent axial movement. After the top of the lower lock body 200 is riveted to the bottom of the lower interlayer plate 300, the second conical surface structure 132 at the bottom of the liner 130 extends into the first through hole 201 of the lower lock body 200 and fits precisely against the second positioning conical surface 207. Complete the secondary positioning calibration; at this time, insert the pin 150 into the bottom end of the locking pin 110 and align the two ends of the pin 150 with the through groove 203 of the locking section 202. Rotate the locking pin 110 clockwise with a tool. The two ends of the pin 150 slide down along the spiral inclined surface 205 on the inner wall of the locking section 202. During this process, the spring 120 is compressed to generate axial preload. When the pin 150 rotates to the end of the spiral inclined surface 205, under the action of the restoring force of the spring 120, the two ends of the pin 150 are embedded in the arc-shaped recess 206 of the locking groove 204, achieving reliable locking.

[0032] In this embodiment, the first positioning cone surface 313 of the liner 130 matches the countersunk hole 310 of the sandwich plate 300 to achieve a unified positioning reference. At the same time, the stop cup 140 is coaxially nested at the bottom of the liner 130 and is engaged with the inner wall of the liner 130 by the radial flange 141, eliminating the assembly interface between the split positioning seat and the spring 120 seat, reducing the coaxiality deviation between the axis of the spring 120 cavity 142 and the reference axis of the cone surface of the liner 130, thereby avoiding the tilting of the locking pin 110 caused by the preload bias, and making the spring 120 compression force act evenly on the axial direction of the pin 150. This ensures the consistency of the contact pressure distribution between the pin 150 and the locking groove 204 in the locked state, reduces the vibration displacement of the lock body, and meets the precise positioning accuracy after repeated locking of the aircraft.

[0033] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A conical surface positioning quick-release lock, characterized in that, include: The locking body includes a locking pin, a spring, a bushing, a stop cup, and a pin. The liner is fixed in the countersunk hole of the sandwich plate, and the top surface of the liner is a first conical surface structure that matches the countersunk hole; the spring is sleeved on the locking pin; the stop cup is coaxially nested in the bottom of the liner, and the top of the stop cup is provided with a radial flange that engages with the inner wall of the liner. The stop cup is provided with a cavity that accommodates the locking pin and the spring. The bottom end of the locking pin extends into the cavity, and the pin passes through the bottom end of the locking pin and extends out of the locking pin at both ends. The lower locking body has its top end connected to the bottom end of the interlayer plate. The lower locking body has an axial through hole. The liner plate passes through the interlayer plate and partially extends into the first through hole. The bottom end of the first through hole has a locking section. The left and right sides of the locking section have axial through grooves. The front and rear sides of the locking section have locking grooves that can engage the two ends of the pin. When the pin is rotated, it moves from the through groove to the locking groove, the spring is compressed, and the pin is engaged in the locking groove.

2. The conical positioning quick-release lock according to claim 1, characterized in that: The sandwich panel includes an upper panel and a lower panel. The countersunk hole includes a second through hole in the upper panel and a third through hole in the lower panel. A first positioning cone surface is coaxially formed at the top of the second through hole. The liner is disposed in the second through hole, and the first cone surface structure fits the first positioning cone surface.

3. The conical positioning quick-release lock according to claim 2, characterized in that: A receiving groove is formed at the bottom of the second through hole, a retaining ring is fitted on the outside of the liner, the liner is placed in the second through hole, and the retaining ring is engaged in the receiving groove.

4. The conical positioning quick-release lock according to claim 2, characterized in that: The top end of the lower lock body extends into the third through hole. The bottom surface of the liner plate is a second conical structure. A second positioning conical surface is coaxially formed on the inner side of the top end of the first through hole. The liner plate part enters the first through hole, and the second conical structure fits the second positioning conical surface.

5. The conical positioning quick-release lock according to claim 2, characterized in that: The left and right sides of the top of the lower lock body are riveted to the bottom of the lower interlayer plate.

6. The conical positioning quick-release lock according to claim 1, characterized in that: The bottom end of the head of the locking pin is provided with a clamping part, the outer diameter of the clamping part is larger than the inner diameter of the spring, and the top end of the spring abuts against the top end of the clamping part.

7. The conical positioning quick-release lock according to claim 1, characterized in that: The inner wall of the locking section is provided with a spiral inclined surface that matches the circumferential movement trajectory of the pin. The end of the spiral inclined surface near the sandwich plate is connected to the through groove, and the end of the spiral inclined surface away from the sandwich plate is connected to the locking groove. In this process, the rotating pin slides from the through groove along the spiral inclined surface to the locking groove, the spring is compressed, and the pin is engaged in the locking groove.

8. The conical positioning quick-release lock according to claim 1, characterized in that: The bottom of the locking groove has an arc-shaped recess, and part of the pin is inserted into the recess.

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