Pin-type quick-release expansion device

Abstract

A latch-type quick-release expansion device includes a guide rod, a cam handle, a stopper and an expansion assembly. The guide rod is in the shape of a long axis. The cam handle is rotatably connected to one end of the guide rod. The stopper is sleeved on the guide rod and is adjacent to the cam handle. The expansion assembly is sleeved on the guide rod, one end of which abuts against the stopper and the other end is limited by the guide rod. The expansion assembly can be squeezed to expand outward and contract inward to hold the guide rod. The latch-type quick-release expansion device of the present invention transmits force to the expansion assembly through the stopper by rotating the cam handle, so that the outer cone sleeve elastically deforms and expands to form an interference fit with the mounting hole, and the inner cone sleeve elastically deforms and shrinks to hold the guide rod, thereby forming a rigid connection between the device and the connector to ensure strength. The latch-type quick-release expansion device of the present invention can complete locking and unlocking operations on one side. No tools are required for disassembly and the operating force is within the human power range. The operation is very simple and the response speed can be guaranteed.

Description

[Technical field]

[0001] The invention relates to the field of machinery, and in particular to a latch-type quick-release expansion device. [Background technology]

[0002] With the rapid development of the aerospace industry, in order to ensure production efficiency and maintenance efficiency, large military equipment tends to be modular and componentized; in order to adapt to different needs, more and more specific models have been developed under the same platform aircraft, and their specific differences are mainly in the different mounted equipment. This poses new challenges and requirements for interfaces and their connection devices. The connection device is different from the ordinary bolt and nut connection. On the premise of meeting the strength, the operating performance must meet the rapid response and reusability indicators. In the structural connection of modern aircraft, for blind hole connections and situations where the operating space is limited to unilateral operation, the existing bolts and rivets cannot meet the use requirements. The former has high requirements for assembly hole accuracy, complex assembly and long time, while the latter can only be used for connections with smaller interlayer thickness. In large external equipment such as external ammunition boxes and external fuel tanks with limited operating space, they cannot simultaneously meet the strength requirements and the time requirements for rapid operation. [Summary of the invention]

[0003] The present invention aims to solve the above problems and provides a latch-type quick-release expansion device which is suitable for unilateral operation and can meet strength requirements and perform rapid operation.

[0004] In order to solve the above-mentioned problem, the present invention provides a latch-type quick-release expansion device, characterized in that it includes a guide rod, a cam handle, a limit piece and an expansion assembly, wherein the guide rod is in the shape of a long axis; the cam handle is rotatably connected to one end of the guide rod; the limit piece is sleeved on the guide rod and is adjacent to the cam handle; the expansion assembly is sleeved on the guide rod, one end of which abuts against the limit piece and the other end is limited by the guide rod, and the expansion assembly can be squeezed to expand outward and contract inward to hold the guide rod.

[0005] Further, the guide rod comprises a first rod body portion and a second rod body portion, the diameter of the first rod body portion is smaller than the diameter of the second rod body portion, and the first rod body portion and the second rod body portion are connected via a tapered portion.

[0006] Further, the expansion assembly includes an end cone sleeve, a plurality of outer cone sleeves, at least one inner cone sleeve and a spacer sleeve, the end cone sleeve is movably mounted on the first rod body portion and can be deformed radially, and the end cone sleeve is adjacent to the limit member; the outer cone sleeve is movably mounted on the first rod body portion and can be deformed radially, and the outer cone sleeve and the end cone sleeve can be matched through a conical surface; the inner cone sleeve is movably mounted on the first rod body portion and can be deformed radially, and the inner cone sleeve and the outer cone sleeve can be matched through a conical surface; the spacer sleeve is movably mounted on the first rod body portion and can be deformed radially, one end of the spacer sleeve is matched with the inner cone sleeve through a conical surface, and the other end of the spacer sleeve is matched with the conical portion through a conical surface; when the cam handle rotates around the guide rod to squeeze the limit member, the end cone sleeve, the outer cone sleeve, the inner cone sleeve and the spacer sleeve are squeezed against each other so that the end cone sleeve and the inner cone sleeve are tightened inwardly to hold the guide rod, and the outer cone sleeve is expanded outwardly.

[0007] Furthermore, the inner cone sleeve and the outer cone sleeve are arranged at intervals.

[0008] Furthermore, the end cone sleeve is provided with a first opening extending axially and passing through both ends thereof; a first conical surface is provided on the outer wall of the end cone sleeve, and the first conical surface is formed by narrowing the end of the end cone sleeve close to the limiting member to the end away from the limiting member.

[0009] Furthermore, the outer cone sleeve is provided with a second opening extending axially and passing through both ends thereof, and second conical surfaces are respectively provided on the inner walls at both ends of the outer cone sleeve, and the second conical surfaces are formed by the inner walls of the end portions of the outer cone sleeve being inclined inwardly.

[0010] Furthermore, the inner tapered sleeve is provided with a third opening extending axially and penetrating through both ends thereof, and third tapered surfaces are respectively provided on the outer walls at both ends of the inner tapered sleeve, and the third tapered surfaces are formed by the outer walls of the end portions of the inner tapered sleeve being inclined outwards.

[0011] Furthermore, a transverse dimension of the limiting member is greater than a radial dimension of the expansion assembly after expansion.

[0012] The beneficial contribution of the present invention is that it effectively solves the above-mentioned problems. The latch-type quick-release expansion device of the present invention transmits force to the expansion assembly through the limiter by rotating the cam handle, so that the outer cone sleeve elastically deforms and expands to form an interference fit with the mounting hole, and the inner cone sleeve elastically deforms and shrinks to hold the guide rod, so that the device forms a rigid connection with the connecting piece to ensure strength and reach a locked state. In addition, the operating space of the latch-type quick-release expansion device of the present invention is at the insertion end. By rotating the cam handle, the locking and unlocking operations can be completed on one side. No tools are required for its disassembly and the operating force is within the human power range. The operation is very simple and the response speed can be guaranteed. The latch-type quick-release expansion device of the present invention can be designed with structures with different numbers and diameters of cone sleeves for different interlayer thicknesses. Therefore, there is no size restriction on the bolt connection pair, and there is no interlayer thickness restriction on the rivet. Compared with the existing bolt and rivet connection structures, it has stronger versatility and practicality.

Brief Description of the Drawings

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] Figure 2 It is a cross-sectional view of the present invention.

[0015] Figure 3 It is a structural diagram of the end cone sleeve.

[0016] Figure 4 It is a structural schematic diagram of the outer cone sleeve.

[0017] Figure 5 It is a structural schematic diagram of the inner cone sleeve.

[0018] Figure 6 It is a schematic diagram of the structure of the spacer.

[0019] Figure 7 It is another structural schematic diagram of the spacer.

[0020] Figure symbols: guide rod 10, first rod body portion 11, tapered portion 12, second rod body portion 13, oblate rod portion 14, cam handle 20, cam portion 21, handle portion 22, limit member 30, expansion assembly 40, end tapered sleeve 41, first opening 411, first tapered surface 412, outer tapered sleeve 42, second opening 421, second tapered surface 422, inner tapered sleeve 43, third opening 431, third tapered surface 432, spacer sleeve 44, fourth opening 441, fourth tapered surface 442, fifth tapered surface 443. [Specific implementation method]

[0021] The following examples are provided to further explain and supplement the present invention and do not constitute any limitation to the present invention.

[0022] like Figure 1 to Figure 7As shown, the detachable quick-release expansion device of the present invention comprises a guide rod 10, a cam handle 20, a stopper 30 and an expansion assembly 40. The cam handle 20 is rotatably connected to one end of the guide rod 10, and the stopper 30 is sleeved on the guide rod 10 and adjacent to the cam handle 20; the expansion assembly 40 is sleeved on the guide rod 10; when the cam handle 20 is rotated, the force can be transmitted to the expansion assembly 40 through the stopper 30, and the expansion assembly 40 can be squeezed to expand outward to form an interference fit with the mounting hole, and can shrink inward to hold the guide rod 10, thereby forming a stable connection. By rotating the cam handle 20, the expansion assembly 40 can be driven to deform to achieve quick disassembly and assembly, and the operation is very simple.

[0023] Specifically, Figure 1 , Figure 2 As shown, the guide rod 10 is in the form of a long axis, and one end of the guide rod 10 is provided with a rotating shaft hole arranged in a radial direction, which is used to rotate and connect the cam handle 20. The guide rod 10 includes a first rod body portion 11, a tapered portion 12 and a second rod body portion 13 formed in one piece. The first rod body portion 11 is in the form of a round rod, which is used to sleeve the expansion assembly 40. The diameter of the second rod body portion 13 is larger than the diameter of the first rod body portion 11. The tapered portion 12 is connected between the first rod body portion 11 and the second rod body portion 13, and is used to cooperate with the expansion assembly 40 and limit the expansion assembly 40. In this embodiment, an oblate rod portion 14 is further provided at the other end of the first rod body portion 11 opposite to the second rod body portion 13. The oblate rod portion 14 is located at the end face of the first rod body portion 11, and a part of its surface is smoothly connected with the surface of the first rod body portion 11, and another part of its surface is flat and forms a step with the first rod body portion 11. The rotating shaft hole is provided at one end of the oblate rod portion 14.

[0024] like Figure 1 , Figure 2 As shown, the stopper 30 is sleeved on the guide rod 10. In this embodiment, the stopper 30 is sleeved on the oval rod portion 14, which is adjacent to the cam handle 20. The stopper 30 is restricted by the first rod body portion 11 and can only move on the oval rod portion 14. The stopper 30 is in the shape of a round block, and the shape of its center hole can be set according to needs. It can be sleeved on the oval rod portion 14 and cannot pass through the first rod body portion 11.

[0025] In this embodiment, the transverse dimension of the limiting member 30 is larger than the dimension of the expansion assembly 40 after expansion.

[0026] like Figure 1 , Figure 2As shown, the expansion assembly 40 is movably mounted on the guide rod 10, specifically, it is movably mounted on the first rod body 11, one end of which is in contact with the stopper 30, and the other end is limited by the tapered portion 12. The expansion assembly 40 can be squeezed to expand outward to form an interference fit with the mounting hole, and can be contracted inward to hold the guide rod 10 tightly.

[0027] like Figure 1 , Figure 2 As shown, the expansion assembly 40 includes an end cone sleeve 41 , a plurality of outer cone sleeves 42 , at least one inner cone sleeve 43 and a spacer sleeve 44 .

[0028] like Figure 1 , Figure 2 As shown, the end cone sleeve 41 is movably mounted on the guide rod 10 and can be deformed in the radial direction. Specifically, the end cone sleeve 41 is mounted on the first rod body 11 and is adjacent to the stopper 30. Figure 3 As shown, the end cone sleeve 41 is provided with a first opening 411 that can extend in the axial direction and pass through both ends thereof, so that the end cone sleeve 41 can be deformed in the radial direction to expand or contract. A first conical surface 412 is provided on the outer wall of the end cone sleeve 41, and the first conical surface 412 is formed by shrinking the end of the end cone sleeve 41 close to the stopper 30 to the end away from the stopper 30. When the first conical surface 412 is squeezed, the end cone sleeve 41 can be deformed and contracted inwardly.

[0029] like Figure 1 , Figure 2 As shown, the outer cone sleeve 42 is movably mounted on the guide rod 10 and can be deformed radially. Specifically, the outer cone sleeve 42 is mounted on the first rod body 11. The outer cone sleeve 42 can be squeezed with the end cone sleeve 41 and the inner cone sleeve 43 through the conical surface to achieve expansion or contraction. In this embodiment, Figure 4 As shown, the outer cone sleeve 42 is provided with a second opening 421 extending in the axial direction and penetrating through both ends thereof, so that the outer cone sleeve 42 can be deformed in the radial direction and expand outward. The inner walls at both ends of the outer cone sleeve 42 are respectively provided with a second conical surface 422. The second conical surface 422 is formed by the inner wall of the end of the outer cone sleeve 42 being inclined inward. When the second conical surface 422 is squeezed, the outer cone sleeve 42 can be deformed and expand outward.

[0030] like Figure 1 , Figure 2As shown, the inner conical sleeve 43 is movably sleeved on the guide rod 10 and can be deformed in the radial direction. Specifically, the inner conical sleeve 43 is sleeved on the first rod body 11. The inner conical sleeve 43 is spaced apart from the outer conical sleeve 42, that is, an inner conical sleeve 43 is arranged next to an outer conical sleeve 42. The inner conical sleeve 43 at the end position is adjacent to the spacer sleeve 44. The inner conical sleeve 43 can be squeezed with the outer conical sleeve 42 and the spacer sleeve 44 through the conical surface to achieve expansion or contraction. In this embodiment, as Figure 5 As shown, the inner cone sleeve 43 is provided with a third opening 431 extending in the axial direction and penetrating through both ends thereof, so that the inner cone sleeve 43 can be deformed in the radial direction and expand outward. The outer walls at both ends of the inner cone sleeve 43 are respectively provided with a third conical surface 432, and the third conical surface 432 is formed by the outer wall of the end of the inner cone sleeve 43 being inclined outward. When the third conical surface 432 is squeezed, the inner cone sleeve 43 can be deformed and contracted inward.

[0031] like Figure 1 , Figure 2 As shown, the spacer sleeve 44 is movably mounted on the guide rod 10. Specifically, the spacer sleeve 44 is mounted on the first rod body portion 11, and one end thereof cooperates with the inner tapered sleeve 43, and the other end cooperates with the tapered portion 12. A fourth tapered surface 442 and a fifth tapered surface 443 are provided on the inner wall of the spacer sleeve 44. The fourth tapered surface 442 is formed by the inner wall of one end of the spacer sleeve 44 close to the inner tapered sleeve 43 being inclined inwardly, and is used to cooperate with the inner tapered sleeve 43. The fifth tapered surface 443 is formed by the inner wall of one end of the spacer sleeve 44 close to the tapered portion 12 being inclined inwardly, and is used to cooperate with the tapered surface. In some embodiments, as Figure 6 As shown, the spacer 44 can be deformed in the radial direction, and a fourth opening 441 extending in the axial direction and penetrating through both ends of the spacer 44 is provided on the spacer 44, so that the spacer 44 can be deformed in the radial direction. When the spacer 44 is squeezed, the spacer 44 will expand outward. In this embodiment, the spacer 33 cannot be deformed in the radial direction, and the fourth opening 441 is not provided on it (as shown in FIG. Figure 7 shown).

[0032] like Figure 1 , Figure 2 As shown, the end cone sleeve 41 cooperates with the second cone surface 422 of the outer cone sleeve 42 through the first cone surface 412;

[0033] like Figure 1 , Figure 2 As shown, the outer cone sleeve 42 is provided with a plurality of outer cone sleeves 42, and the outer cone sleeve 42 close to the end cone sleeve 41 cooperates with the first cone surface 412 of the end cone sleeve 41 through the second cone surface 422. The outer cone sleeve 42 close to the inner cone sleeve 43 cooperates with the third cone surface 432 of the inner cone sleeve 43 through the second cone surface 422.

[0034] like Figure 1 , Figure 2 As shown, the inner conical sleeve 43 is provided with at least one inner conical sleeve 43 close to the outer conical sleeve 42, which cooperates with the second conical surface 422 of the outer conical sleeve 42 through the third conical surface 432. The inner conical sleeve 43 close to the spacer sleeve 44 cooperates with the fourth conical surface 442 of the spacer sleeve 44 through the third conical surface 432.

[0035] like Figure 1 , Figure 2 As shown, one end of the spacer sleeve 44 cooperates with the inner tapered sleeve 43 through the fourth tapered surface 442 , and the other end cooperates with the tapered portion 12 of the guide rod 10 through the fifth tapered surface 443 .

[0036] like Figure 1 , Figure 2 As shown, the cam handle 20 includes a cam portion 21 and a handle portion 22. The cam portion 21 and the handle portion 22 are integrally formed or fixedly connected. In this embodiment, the cam portion 21 and the handle portion 22 are integrally formed. The cam portion 21 is rotatably connected to the guide rod 10 via a rotating shaft.

[0037] When the cam handle 20 is rotated, the cam handle 20 can squeeze the stopper 30, and the stopper 30 transmits force to the expansion assembly 40, and the expansion assembly 40 is squeezed and deformed: the end cone sleeve 41 and the inner cone sleeve 43 shrink inwards and hold the guide rod 10 tightly, and the outer cone sleeve 42 expands outwards and can form an interference fit with the mounting hole, thereby playing a role of stable connection. When disassembly is required, the cam handle 20 is rotated so that the cam handle 20 no longer squeezes the stopper 30, and the expansion assembly 40 loses external force squeezing and can automatically relax, so that the outer cone sleeve 42 and the mounting hole no longer form an interference fit, so that the latch-type quick-release expansion device can be pulled out from the mounting hole.

[0038] Although the present invention is disclosed through the above embodiments, the scope of the present invention is not limited thereto, and the above components may be replaced with similar or equivalent elements known to those skilled in the art without departing from the concept of the present invention.

Claims

1. A latch-type quick-release expansion device, characterized in that: It includes: The guide rod (10) is in the shape of a long axis; the guide rod (10) comprises a first rod body portion (11) and a second rod body portion (13); the diameter of the first rod body portion (11) is smaller than the diameter of the second rod body portion (13); the first rod body portion (11) and the second rod body portion (13) are connected via a tapered portion (12); A cam handle (20) rotatably connected to one end of the guide rod (10); A stopper (30) sleeved on the guide rod (10) and adjacent to the cam handle (20); An expansion component (40) is sleeved on the guide rod (10), one end of which is in contact with the stopper (30) and the other end of which is limited by the guide rod (10); the expansion component (40) can be squeezed to expand outwards and contract inwards to hold the guide rod (10); The expansion assembly (40) comprises: an end cone sleeve (41) movably sleeved on the first rod body portion (11) and capable of radial deformation, the end cone sleeve (41) being adjacent to the stopper (30); A plurality of outer cone sleeves (42) are movably sleeved on the first rod body portion (11) and are capable of radial deformation, and the outer cone sleeves (42) and the end cone sleeves (41) are capable of matching with each other through a cone surface; at least one inner conical sleeve (43), which is movably mounted on the first rod body (11) and can be deformed in the radial direction, and the inner conical sleeve (43) and the outer conical sleeve (42) can be matched via a conical surface; a spacer sleeve (44) movably sleeved on the first rod body portion (11); one end of the spacer sleeve (44) cooperates with the inner cone sleeve (43) via a cone surface, and the other end of the spacer sleeve (44) cooperates with the cone portion (12) via a cone surface; the spacer sleeve (44) cannot be deformed in the radial direction, and is not provided with a fourth opening (441); When the cam handle (20) rotates around the guide rod (10) and squeezes the stopper (30), the end cone sleeve (41), the outer cone sleeve (42), the inner cone sleeve (43), and the spacer sleeve (44) are squeezed against each other, so that the end cone sleeve (41) and the inner cone sleeve (43) shrink inwards and hold the guide rod (10), and the outer cone sleeve (42) expands outwards to form an interference fit with the mounting hole; When in use, the latch-type quick-release expansion device can be inserted into a mounting hole and the locking and unlocking operations can be achieved by unilaterally operating the cam handle (20).

2. The latch-type quick-release expansion device according to claim 1, characterized in that: The inner cone sleeve (43) and the outer cone sleeve (42) are arranged at intervals.

3. The latch-type quick-release expansion device according to claim 1, characterized in that: The end cone sleeve (41) is provided with a first opening (411) extending in the axial direction and penetrating through both ends thereof; a first conical surface (412) is provided on the outer wall of the end cone sleeve (41), and the first conical surface (412) is formed by narrowing an end of the end cone sleeve (41) close to the stopper (30) toward an end away from the stopper (30).

4. The latch-type quick-release expansion device according to claim 1, characterized in that: The outer cone sleeve (42) is provided with a second opening (421) extending in the axial direction and penetrating through both ends thereof, and second cone surfaces (422) are respectively provided on the inner walls at both ends of the outer cone sleeve (42), and the second cone surfaces (422) are formed by the inner walls of the end portions of the outer cone sleeve (42) being inclined inwardly.

5. The latch-type quick-release expansion device according to claim 1, characterized in that: The inner tapered sleeve (43) is provided with a third opening (431) extending in the axial direction and penetrating through both ends thereof, and third tapered surfaces (432) are respectively provided on the outer walls at both ends of the inner tapered sleeve (43), and the third tapered surfaces (432) are formed by the outer walls of the end portions of the inner tapered sleeve (43) being inclined outwards.

6. The latch-type quick-release expansion device according to claim 1, characterized in that: The transverse dimension of the limiting member (30) is greater than the radial dimension of the expansion assembly (40) after expansion.

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