CN213017161U - Quick-release expansion device - Google Patents

Abstract

A quick-release expansion device is characterized by comprising a core bar, a cam handle, an elastic sheet, an end cover and an expansion assembly, wherein the cam handle is rotatably connected to one end of the core bar, and the end cover can be connected to the other end of the core bar; the expansion component is movably sleeved on the core rod and can expand outwards and contract inwards to tightly hold the core rod under the action of the cam handle; one end of the elastic sheet is connected with the cam handle, and the other end of the elastic sheet is provided with a connecting hole; the utility model discloses a quick-release expansion device, only the end cover when target in place of packing into, the shell fragment could embolia the end cover and carry out the closure, when the end cover did not pack into target in place, the shell fragment can't embolia the end cover and carry out the closure, like this, the potential safety hazard problem that exists when alright effectively avoiding the carry not target in place. The utility model discloses a quick-release expansion device can realize locking connection and dismantlement through simple cam handle operation, and its security is strong, and easy operation has very strong utility new, should widely popularize.

Description

Quick-release expansion device

[ technical field ] A method for producing a semiconductor device

The utility model relates to a connecting piece, in particular to quick-release expansion device.

[ background of the invention ]

With the rapid development of aerospace industry, the working environment of aerospace products is increasingly severe, common threaded connection byproducts cannot meet the use requirements of the existing aerospace products, and a threaded connection pair with high performance and adjustable high matching precision tends to be great. In the design of aerospace vehicle parts, the radial clearance of a threaded connection pair needs to be reduced, and the adjustable transition fit or interference fit of a bolt product and a base body is realized. The existing bolt connecting piece is difficult to meet the design requirement, the processing cost of the bolt is expensive, and the bolt can not be assembled and disassembled repeatedly for recycling. The radial size of the tension bolt can be adjusted, so that the lubrication and the anticorrosive coating on the surfaces of the bolt and the base body can not be influenced, the tension bolt can be assembled and disassembled for use for many times, and meanwhile, the gap in assembly caused by the abrasion of the bolt and the base body can be avoided, so that the tension bolt is widely applied to the fastening connection in the aerospace field. The existing tension bolt is complex in operation generally, and particularly for an object to be connected needing a hanging beam, connection and locking cannot be achieved rapidly through simple operation.

[ Utility model ] content

The utility model aims at solving the above problems, and provides a quick-release expansion device which is convenient to operate, reliable in connection, and capable of quickly locking the axial direction and avoiding misoperation.

In order to solve the problems, the utility model provides a quick-release expansion device, which is characterized in that the device comprises a core bar, a cam handle, an expansion component, a spring plate and an end cover, wherein the core bar is in a long shaft shape; the cam handle is rotationally connected to one end of the core rod; the expansion component is movably sleeved on the core rod and can be extruded to expand outwards and contract inwards to hold the core rod tightly; one end of the elastic sheet is connected with the cam handle, and the other end of the elastic sheet is provided with a connecting hole; the end cap may be connected to an end of the core rod opposite the cam handle; when the end cover is in a first position state, the end cover can move along the axial direction of the core rod to be separated from the core rod, and the elastic sheet cannot be sleeved on the end cover through the connecting hole of the elastic sheet; when the end cover is in the second position state, the end cover and the end part of the core rod form axial limiting connection and cannot be separated from the core rod along the axial direction of the core rod, and the elastic sheet can be sleeved on the end cover through the connecting hole of the elastic sheet.

Furthermore, a guide groove arranged along the axial direction and a limit groove arranged along the circumferential direction are arranged on the outer wall of the end part of the core rod, the guide groove extends from the end part of the core rod along the axial direction, and the limit groove is communicated with the guide groove; the end cover is provided with a shaft hole, the inner wall of the shaft hole is provided with a convex positioning part, and the positioning part can be clamped into the guide groove and can rotate into the limiting groove from the guide groove; when the positioning part of the end cover is positioned in the guide groove, the end cover is in a first position state; when the positioning part of the end cover is positioned in the limiting groove, the end cover is in a second position state.

Further, the end cover comprises a cover plate part and a connecting part which are integrally formed, the peripheral size of the cover plate part is larger than that of the connecting part, and a first limiting step is formed at the joint of the cover plate part and the connecting part; the shaft hole extends from an end of the cover plate portion in the axial direction and penetrates into the connecting portion.

Further, the core rod comprises a core rod main body and a limiting connecting column which are integrally formed, and a second limiting step is formed at the joint of the limiting connecting column and the core rod main body; the limiting connecting column is provided with the guide groove and the limiting groove; the expansion assembly is sleeved on the core rod main body.

Further, the core rod main body comprises a cam connecting part, a cylindrical part and a circular table part which are integrally formed; the cylindrical part is positioned between the cam connecting part and the circular table part; the cam connecting part is rotationally connected with the cam handle; the expansion component is movably sleeved on the cylindrical part; the diameter of the end part of one end of the circular table part, which is far away from the cylindrical part, is larger than that of the cylindrical part; the limiting connecting column is vertically formed on the end face of the circular table part and is coaxial with the circular table part.

Further, the end cover is connected with the elastic sheet through a safety rope.

Furthermore, the expansion component comprises an end taper sleeve, an outer taper sleeve and an inner taper sleeve, and the end taper sleeve is movably sleeved on the core rod and can deform along the radial direction; the end cone sleeve is adjacent to the cam handle; the outer taper sleeve is movably sleeved on the core rod and can deform along the radial direction; the outer taper sleeve is positioned between the end taper sleeve and the end part of the core rod, which is used for connecting the end cover; the outer taper sleeve is matched with the end taper sleeve through a taper surface at the end part; the inner cone sleeve is movably sleeved on the core rod and can deform along the radial direction; the inner taper sleeve is positioned between two adjacent outer taper sleeves and is matched with the outer taper sleeves through the taper surfaces at the end parts; when the cam handle rotates around the core rod and extrudes the end taper sleeve, the outer taper sleeve and the inner taper sleeve are mutually extruded, so that the end taper sleeve and the inner taper sleeve are inwards contracted to tightly hold the core rod, and the outer taper sleeve is outwards expanded.

Further, the end cone sleeve comprises a conical part and a convex edge part integrally formed on the end part of the conical part, and the convex edge part protrudes out of the end part of the conical part and faces the cam handle; the outer wall of the conical part is provided with a first conical surface, and the first conical surface is formed by inclining the outer wall of the end part of the conical part outwards to the convex edge part.

Furthermore, a second opening which extends along the axial direction and penetrates through two ends of the outer taper sleeve is arranged on the outer taper sleeve, second taper surfaces are respectively arranged on the inner walls of the two ends of the outer taper sleeve, and the second taper surfaces are formed by inwards inclining the inner walls of the end parts of the outer taper sleeve.

Furthermore, the inner taper sleeve is provided with a third opening which extends along the axial direction and runs through two ends of the inner taper sleeve, the outer walls of the two ends of the inner taper sleeve are respectively provided with a third taper surface, and the third taper surface is formed by outwards inclining the outer wall of the end part of the inner taper sleeve.

The beneficial contributions of the utility model reside in that, it has effectively solved above-mentioned problem. The utility model discloses a quick-release expansion device, which comprises a core bar, a cam handle, a spring plate, an end cover and an expansion component, wherein the cam handle is rotationally connected with one end of the core bar, and the end cover can be connected with the other end of the core bar; the expansion component is movably sleeved on the core rod and can expand outwards and contract inwards to tightly hold the core rod under the action of the cam handle; one end of the elastic sheet is connected with the cam handle, and the other end of the elastic sheet is provided with a connecting hole; the utility model discloses a quick-release expansion device, only the end cover when target in place of packing into, the shell fragment could embolia the end cover and carry out the closure, when the end cover did not pack into target in place, the shell fragment can't embolia the end cover and carry out the closure, like this, the potential safety hazard problem that exists when alright effectively avoiding the carry not target in place. The utility model discloses a quick-release expansion device can realize locking connection and dismantlement through simple cam handle operation, and its security is strong, and easy operation has very strong utility new, should widely popularize.

[ description of the drawings ]

Fig. 1 is a schematic view of the entire structure when closed.

Fig. 2 is a cross-sectional view when closed.

Fig. 3 is an exploded view of the entire structure.

Fig. 4 is a schematic illustration of the core pin 10 and end cap 50.

Fig. 5 is a schematic structural view of the end cap 50.

Fig. 6 is a schematic view of the principle when open.

Fig. 7 is a schematic view of the principle when closed.

The attached drawings are as follows: the connecting rod comprises a core rod 10, a limiting connecting column 11, a guide groove 111, a limiting groove 112, a core rod main body 12, a cam connecting part 121, a rotating shaft hole 1211, a cylindrical part 122, a circular table part 123, a second limiting step 13, a cam handle 20, a cam part 21, an extension part 22, an expansion assembly 30, an end cone sleeve 31, a convex edge part 311, a conical part 312, a first conical surface 3121, an outer cone sleeve 32, a second opening 321, a second conical surface 322, an inner cone sleeve 33, a third opening 331, a third conical surface 332, an elastic sheet 40, a connecting hole 41, an end cover 50, a shaft hole 51, a positioning part 52, a cover plate part 53, a connecting part 54, a first limiting step 55, a safety rope 60, a rotating shaft 70 and an object 100 to be connected.

[ detailed description ] embodiments

The following examples are further to explain and supplement the present invention, and do not constitute any limitation to the present invention.

As shown in fig. 1 to 7, the main point of the quick-release expansion device of the present invention is that an end cap 50 for axial limiting and anti-misoperation is disposed at the end of the core rod 10, and only when the end cap 50 is put in place, the elastic sheet 40 can be sleeved on the end cap 50 to realize closing; when the end cover 50 is not installed in place, the elastic sheet 40 cannot be sleeved on the end cover 50; the end cover 50 is easy and convenient to install, so that the end cover is convenient to operate, can be quickly locked, is beneficial to preventing misoperation, and has strong safety and practicability.

Specifically, as shown in fig. 1 to 3, the quick-release expansion device of the present invention comprises a core bar 10, a cam handle 20, an expansion assembly 30, a spring plate 40 and an end cover 50. Cam handle 20 is rotatably connected to one end of core rod 10, and end cap 50 may be connected to the other end of core rod 10; the expansion component 30 is movably sleeved on the core rod 10 and can expand outwards and contract inwards to hold the core rod 10 tightly under the action of the cam handle 20; one end of the elastic sheet 40 is connected with the cam handle 20, and the other end of the elastic sheet 40 is provided with a connecting hole 41; when the end cap 50 is not locked in place and is in the first position state, the end cap 50 can move along the axial direction of the core rod 10 to be separated from the core rod 10, and the elastic sheet 40 cannot be sleeved on the end cap 50 through the connecting hole 41 of the elastic sheet; when the end cap 50 is locked in position and is in the second position state, the end cap 50 forms an axial limit connection with the end of the core rod 10 and cannot be separated from the core rod 10 along the axial direction of the core rod 10, and the elastic sheet 40 can be sleeved on the end cap 50 through the connecting hole 41 thereof.

In order to limit connection with the end cap 50 and prevent misoperation, as shown in fig. 3 and 4, a guide groove 111 and a limiting groove 112 are arranged on the outer wall of the end part of the core rod 10. The guide groove 111 is provided in the axial direction of the core rod 10, and is formed by extending the end of the core rod 10 in the axial direction. The stopper groove 112 is provided along the circumferential direction of the core bar 10, and is penetrated through the guide groove 111. The specific shapes of the stopper groove 112 and the guide groove 111 are not limited, and they penetrate each other to form a corner groove. In this embodiment, the limiting groove 112 is perpendicular to the guiding groove 111 to form an L-shaped corner groove. In other embodiments, the limiting groove 112 and the wire guiding groove do not have to be perpendicular.

The number of the limiting grooves 112 and the number of the guide grooves 111 may be set according to the requirement, in this embodiment, 2 limiting grooves 112 and 2 guide grooves 111 are symmetrically arranged on the outer wall of the core rod 10.

Accordingly, as shown in fig. 3, 4 and 5, the end cap 50 is provided with a shaft hole 51 which can be inserted into an end of the stem 10. In order to cooperate with the limiting groove 112 and the guiding groove 111, a corresponding positioning portion 52 is provided on the inner wall of the shaft hole 51. The positioning portion 52 protrudes from the inner wall of the shaft hole 51, can be clamped into the guide groove 111, and can rotate from the guide groove 111 to the limiting groove 112.

During installation, as shown in fig. 3 and 4, the shaft hole 51 corresponds to the end of the core rod 10, the positioning portion 52 corresponds to the limiting groove 112, the end cap 50 is sleeved on the end of the core rod 10 along the axial direction of the core rod 10, and then the end cap 50 is rotated, so that the positioning portion 52 of the end cap 50 slides to the other end of the limiting groove 112 from the guide groove 111, thereby the end cap 50 and the core rod 10 form an axial limiting connection, and the end cap 50 cannot axially move relative to the core rod 10 (as shown in fig. 1).

When the end cap 50 is sleeved on the end of the core rod 10 and the positioning part 52 is located in the guiding groove 111, the end cap 50 is in a locked-in-place state, and at this time, it is in a first position state: end cap 50 is axially movable relative to core pin 10.

When the end cap 50 is sleeved on the end of the core rod 10 and the positioning portion 52 is located in the limiting groove 112, the end cap 50 is in the locked-in-place state, and at this time, it is in the second position state: end cap 50 is prevented from axial movement relative to core pin 10.

When the end cap 50 is in the first position state, when the cam handle 20 is rotated, the connecting hole 41 on the elastic sheet 40 cannot always correspond to the end cap 50, so that the elastic sheet 40 cannot be sleeved on the end cap 50 to be closed;

when the end cap 50 is in the second position, when the cam handle 20 is rotated, the connecting hole 41 of the resilient tab 40 corresponds to the end cap 50, so that the resilient tab 40 can be inserted into the end cap 50 to be closed.

The shapes of the connecting hole 41 and the end cap 50 may be set according to the needs, and are not limited to the structure shown in the drawings of the present embodiment. For example, the end cap 50 is provided in an eccentric structure, and when the end cap 50 is rotated, the end position thereof is changed to be aligned with or misaligned with the coupling hole 41. In this embodiment, as shown in fig. 1, 3 and 4, the connecting hole 41 is a hexagonal hole, but is not a regular hexagonal hole; the end part of the end cover 50 is in a hexagon nut shape but not in a regular hexagon nut shape; in the first position, the hexagon of the end cap 50 cannot completely correspond to the hexagon of the connecting hole 41, and therefore, the elastic sheet 40 cannot be sleeved on the end cap 50; in the second position, the hexagonal shape of the end cap 50 completely corresponds to the hexagonal shape of the connection hole 41, and the resilient piece 40 can be sleeved on the end cap 50.

To describe the structural principle in more detail, in the present embodiment, as shown in fig. 4, the end cap 50 includes a cover plate portion 53 and a connecting portion 54 which are integrally formed. The cover plate portion 53 has a peripheral dimension larger than that of the connecting portion 54, and a first stopper step 55 is formed at a junction thereof. The cover plate portion 53 is a plate and is used for axially limiting the object 100 to be connected and preventing the object 100 to be connected from being separated from the quick release expansion device. The connecting portion 54 is used for connecting with the elastic sheet 40. In this embodiment, the connecting portion 54 is in the shape of a hexagonal nut having a non-regular hexagonal shape.

As shown in fig. 4, the shaft hole 51 extends from an end of the cover plate 53 in the axial direction and penetrates into the connecting portion 54. The positioning portion 52 is disposed on the inner wall of the shaft hole 51, and in this embodiment, is located on the cover plate portion 53, is flush with the end portion of the cover plate portion 53, and protrudes from the inner wall of the shaft hole 51.

As shown in fig. 2 and 3, a safety cord 60 is connected to the end cap 50 to prevent the end cap 50 from being lost. The safety cord 60 is connected to the end cap 50 in a known manner. The other end of the safety cord 60 is connected to the elastic sheet 40, so that the end cap 50 will not fall off when being released, thereby preventing loss.

As shown in fig. 3 and 4, the core rod 10 includes a core rod main body 12 and a limiting connection column 11 which are integrally formed. The mandrel body 12 is adapted to be coupled to the cam handle 20 and the expansion assembly 30. The limiting connecting column 11 is used for being connected with the end cover 50. The outer dimension of the limit connecting column 11 is smaller than that of the core rod main body 12, so that a second limit step 13 is formed at the joint of the limit connecting column and the core rod main body. The second limit step 13 may abut against the cover plate portion 53 of the end cover 50.

As shown in fig. 3 and 4, the limiting connection column 11 is cylindrical and coaxial with the core rod main body 12. Two guide grooves 111 and two limiting grooves 112 are arranged on the outer wall of the limiting connecting column 11. In this embodiment, the bottom end of the limiting groove 112 is flush with the second limiting step 13, so that when the end cap 50 is snapped into place and is in the second position state, the cover plate portion 53 of the end cap 50 can abut against the surface of the second limiting step 13.

As shown in fig. 3 and 4, to facilitate the installation of the cam handle 20 and the expansion assembly 30, the stem body 12 includes a cam connecting portion 121, a cylindrical portion 122, and a circular truncated portion 123 which are integrally formed.

As shown in fig. 3 and 4, the cam connecting portion 121 is used for rotatably connecting the cam handle 20, and is provided with a rotating shaft hole 1211. The axial direction of the rotary shaft hole 1211 is perpendicular to the axial direction of the core rod main body 12. The specific shape of the cam connecting portion 121 is not limited, and it may be set as needed. In this embodiment, the cam connecting portion 121 is a plate-shaped member.

As shown in fig. 3 and 4, the cylindrical portion 122 is located between the cam connecting portion 121 and the circular truncated cone portion 123, and is used for movably sleeving the expansion assembly 30. The diameter of the cylindrical portion 122 can be set as desired, and it should be no larger than the outer peripheral dimension of the end cap 50, i.e. the outer peripheral dimension of the cover plate portion 53, so that the end cap 50 can perform the axial limiting function.

As shown in fig. 3 and 4, the surface of the circular truncated cone portion 123 is a tapered surface, which facilitates mutual pressing with the outer cone 32. The end of the circular truncated cone 123 remote from the cylindrical portion 122 has a larger diameter than the cylindrical portion 122, so that the end of the stem body 12 is expanded. In addition, the diameter of the end of the circular truncated cone portion 123 away from the cylindrical portion 122 should be smaller than the outer circumference of the cover plate portion 53, so that the end cover 50 can perform the axial limiting function.

As shown in fig. 1, 2 and 3, the cam handle 20 is rotatably connected to an end of the core rod 10, and in this embodiment, is rotatably connected to the cam connecting portion 121 of the core rod 10 via a rotating shaft 70. The cam handle 20 includes an integrally formed cam portion 21 and an extension portion 22. The cam portion 21 is rotatably connected to the cam connecting portion 121, and is rotatable about a rotation shaft 70. The circumferential outer wall of the cam portion 21 is spaced from the rotary shaft 70 at various distances. The extension 22 is used for connecting with the elastic sheet 40 to carry out hanging beam connection.

As shown in fig. 1, 2 and 3, one end of the elastic sheet 40 is connected to the extension portion 22 of the cam handle 20, and the other end thereof is provided with a connection hole 41, and the end of the elastic sheet 40 provided with the connection hole 41 can be sleeved on the end cover 50 to be closed, so as to realize the beam connection. The material of the elastic sheet 40 can be selected according to the requirement, such as a metal material. The shape of the elastic sheet 40 can be set according to the requirement, in this embodiment, the elastic sheet 40 and the extension portion 22 form a U-shaped structure, which is beneficial to hanging a beam. The shape of the connecting hole 41 may be set as required, and in this embodiment, it is a hexagonal shape other than a regular hexagonal shape.

As shown in fig. 1, 2 and 3, the expansion assembly 30 for expansion connection by extrusion includes an end cone 31, an outer cone 32 and an inner cone 33 movably fitted over the mandrel 10 between the cam handle 20 and the circular table portion 123. The adjacent parts of the expansion assembly 30 are engaged with each other by the tapered surfaces, and when the adjacent parts are pressed, the adjacent parts are pressed against each other, so that the inner end cone 31 and the inner cone 33 are locked inward to hold the core rod 10, and the outer cone 32 is expanded outward to expand the object 100 to be connected, thereby realizing the expansion connection.

As shown in fig. 1, 2 and 3, the end cone sleeve 31 is movably sleeved on the core bar 10 and adjacent to the cam handle 20. In this embodiment, the end cone sleeve 31 is movably sleeved on the cylindrical portion 122. The end cone 31 includes a tapered portion 312 and a ledge portion 311 that are integrally formed. The protruding edge part 311 is formed on the end of the tapered part 312, and the protruding edge part 311 protrudes from the end of the tapered part 312. The raised edge 311 is used for axial retention, and faces the cam handle 20. The outer wall of the tapered portion 312 is provided with a first tapered surface 3121. The first tapered surface 3121 is formed by the outer wall of the end portion of the tapered portion 312 being inclined outward to the convex edge portion 311. In other words, the end of the tapered portion 312 close to the protruding edge 311 is made thicker and the end far from the protruding edge 311 is made thinner by the first tapered surface 3121 on the end cone sleeve 31.

As shown in fig. 1, 2 and 3, the outer taper sleeve 32 is movably sleeved on the core rod 10, and in this embodiment, is sleeved on the cylindrical portion 122. The number of the outer taper sleeves 32 is at least two, and the specific number can be set according to the requirement. In this embodiment, the number of the outer taper sleeves 32 is 3.

As shown in fig. 1, 2 and 3, the outer taper sleeve 32 is provided with a second opening 321 extending in the axial direction and penetrating through both ends thereof; the second opening 321 provides the outer cone 32 with elasticity to be radially deformable and thus to be outwardly expandable. Second tapered surfaces 322 are respectively arranged on the inner walls of the two ends of the outer taper sleeve 32, and the second tapered surfaces 322 are formed by inward inclination of the inner walls of the ends of the outer taper sleeve 32. In other words, the inner wall of the outer cone 32 is provided with the second tapered surface 322, so that the two end walls of the outer cone 32 are thin, and the middle wall is thick.

In this embodiment, the inclination angle of the second taper surface 322 is consistent with the inclination angle of the first taper surface 3121, so that the end cone 31 and the outer cone 32 can be matched with each other by the first taper surface 3121 and the second taper surface 322. When the end cone sleeve 31 is matched with the outer cone sleeve 32, the first tapered surface 3121 of the end cone sleeve 31 is attached to the second tapered surface 322 of the outer cone sleeve 32, the end cone sleeve 31 and the outer cone sleeve 32 can be pressed against each other to expand the outer cone sleeve 32 outwards, and the end cone sleeve 31 contracts inwards to hold the core rod 10.

In addition, the inclination angle of the second tapered surface 322 is also consistent with the inclination angle of the conical surface of the circular table portion 123, so that the outer taper sleeve 32 can be matched with the circular table portion 123 through the second tapered surface 322. When the outer cone 32 is engaged with the circular table portion 123, the second tapered surface 322 of the outer cone 32 is engaged with the tapered surface of the circular table portion 123, and the outer cone 32 presses the circular table portion 123 to expand the outer cone 32 outward.

As shown in fig. 1, 2 and 3, the inner taper sleeve 33 is movably sleeved on the core rod 10, and in this embodiment, is sleeved on the cylindrical portion 122. At least one inner taper sleeve 33 is arranged between two adjacent outer taper sleeves 32. The specific number of the inner taper sleeves 33 can be set according to requirements, and in the embodiment, the number of the inner taper sleeves 33 is 2.

As shown in fig. 1, 2 and 3, the inner taper sleeve 33 is provided with a third opening 331 extending axially through both ends thereof, and the third opening 331 makes the inner taper sleeve 33 elastic and deformable in the radial direction, and thus can be inwardly shrunk. Third tapered surfaces 332 are respectively disposed on outer walls of both ends of the inner tapered sleeve 33, and the third tapered surfaces 332 are formed by inclining the outer walls of the ends of the inner tapered sleeve 33 outwards. In other words, the outer wall of the inner tapered sleeve 33 is provided with the third tapered surface 332, so that the two end walls of the inner tapered sleeve 33 are thin, and the middle wall is thick.

In this embodiment, the inclination angle of the third tapered surface 332 is consistent with that of the second tapered surface 322, so that the inner taper sleeve 33 and the outer taper sleeve 32 can be engaged with each other through the third tapered surface 332 and the second tapered surface 322. When the inner taper sleeve 33 is matched with the outer taper sleeve 32, the third taper surface 332 of the inner taper sleeve 33 is abutted with the second taper surface 322 of the outer taper sleeve 32, the inner taper sleeve 33 and the outer taper sleeve 32 can be mutually pressed to cause the outer taper sleeve 32 to expand outwards, and the inner taper sleeve 33 contracts inwards to clamp the core pin.

Thus, as shown in fig. 1, 2 and 3, the quick-release expanded form of the present invention is formed: one end of the core bar 10 is rotatably connected with a cam handle 20, and the other end can be connected with an end cover 50; one end of the elastic sheet 40 is connected with the cam handle 20, and the other end is provided with a connecting hole 41 which can be sleeved on the end cover 50; an expansion assembly 30 consisting of an end cone sleeve 31, an outer cone sleeve 32 and an inner cone sleeve 33 is sleeved on the core rod 10, is positioned between the cam handle 20 and the end cover 50, can be retracted inwards to tightly hold the core rod 10, and can be expanded outwards to tightly expand the object 100 to be connected; the end cover 50 can be connected to the limiting connecting column 11 of the core bar 10; the end cover 50 is provided with a positioning part 52, and the limiting connecting column 11 is provided with a guide groove 111 and a limiting groove 112, so that the end cover 50 can be clamped into the limiting groove 112 along the guide groove 111 to realize axial limiting connection; when the end cap 50 is not snapped into place, it is in a first position: the positioning part 52 of the end cover 50 is positioned in the guide groove 111, the end cover 50 can move axially relative to the core rod 10, and at this time, the elastic sheet 40 can not be sleeved on the end cover 50 through the connecting hole 41; when the end cap 50 is snapped into place, it is in the second position: the positioning part 52 of the end cover 50 is located in the limiting groove 112, the end cover 50 forms an axial limiting connection with the core rod 10, the end cover 50 cannot move axially relative to the core rod 10, and at this time, the elastic sheet 40 can be sleeved on the end cover 50 through the connecting hole 41.

The utility model discloses a quick-release expansion device is used for inserting to the use in waiting to connect the mounting hole of article 100. When in use, the quick-release expansion device is firstly opened, so that the elastic sheet 40 is not sleeved on the end cover 50, and the end cover 50 is taken down from the core rod 10; then, the core rod 10 is aligned with the mounting hole and inserted into the object 100 to be connected (as shown in fig. 6), and the end cover 50 is installed on the limiting connecting column 11 of the core rod 10, so that the end cover 50 is installed in place and is in a second position state; cam handle 20 is then rotated to hang spring 40 on end cap 50 for closure (as shown in fig. 7). In the process, the cam handle 20 presses the end taper sleeve 31, so that the expansion assembly 30 is extruded and deformed, at the moment, the end taper sleeve 31 and the inner taper sleeve 33 are pressed and locked inwards to hold the core rod 10, and the outer taper sleeve 32 expands outwards to form interference fit with a mounting hole of the object 100 to be connected so as to expand the object 100 to be connected; the protruding edge part 311 of the end cone sleeve 31 and the cover plate part 53 of the end cover 50 further limit the object 100 to be connected in the axial direction, so that the object 100 to be connected is prevented from slipping, an axial locking effect is further realized, and the connection safety is ensured.

When disassembly is desired, the snap tab 40 is removed from the end cap 50, the end cap 50 is removed and the cam handle 20 is rotated (as shown in FIG. 6) to release the expansion assembly 30 and allow the quick release expansion device to be withdrawn from the mounting hole of the object 100 to be attached.

The utility model discloses a quick-release expansion device, only when end cover 50 packs into target in place, shell fragment 40 could embolia end cover 50 and carry out the closure (as shown in figure 1, figure 2, figure 7), and when end cover 50 did not pack into target in place, shell fragment 40 could not embolia end cover 50 and carry out the closure, like this, the potential safety hazard problem that exists when alright effectively avoiding the carry not target in place. The utility model discloses a quick-release expansion device can realize locking connection and dismantlement through simple cam handle 20 operation, and its security is strong, and easy operation has very strong utility new, should widely popularize.

While the invention has been described with reference to the above embodiments, the scope of the 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 invention.

Claims (10)

1. A quick release inflation device, comprising:

a core bar (10) having a long axis shape;

a cam handle (20) rotatably connected to one end of the core rod (10);

the expansion component (30) is movably sleeved on the core rod (10) and can be extruded to expand outwards and contract inwards to hold the core rod (10);

one end of the elastic sheet (40) is connected with the cam handle (20), and the other end of the elastic sheet is provided with a connecting hole (41);

an end cap (50) connectable to an end of the core rod (10) opposite the cam handle (20);

when the end cover (50) is in a first position state, the end cover (50) can move along the axial direction of the core rod (10) to be separated from the core rod (10), and the elastic sheet (40) cannot be sleeved on the end cover (50) through the connecting hole (41) of the elastic sheet;

when the end cover (50) is in the second position state, the end cover (50) and the end part of the core rod (10) form axial limiting connection and cannot be separated from the core rod (10) along the axial direction of the core rod (10), and the elastic sheet (40) can be sleeved on the end cover (50) through the connecting hole (41) of the elastic sheet.

2. The quick release inflation device of claim 1,

a guide groove (111) arranged along the axial direction and a limiting groove (112) arranged along the circumferential direction are formed in the outer wall of the end part of the core rod (10), the guide groove (111) extends from the end part of the core rod (10) along the axial direction, and the limiting groove (112) is communicated with the guide groove (111);

the end cover (50) is provided with a shaft hole (51), the inner wall of the shaft hole (51) is provided with a protruding positioning part (52), and the positioning part (52) can be clamped into the guide groove (111) and can rotate into the limiting groove (112) from the guide groove (111);

when the positioning part (52) of the end cover (50) is positioned in the guide groove (111), the end cover (50) is in a first position state; when the positioning part (52) of the end cover (50) is positioned in the limiting groove (112), the end cover (50) is in a second position state.

3. The quick release inflation device of claim 2,

the end cover (50) comprises a cover plate part (53) and a connecting part (54) which are integrally formed, the peripheral size of the cover plate part (53) is larger than that of the connecting part (54), and a first limiting step (55) is formed at the joint of the cover plate part and the connecting part;

the shaft hole (51) extends from an end of the cover plate (53) in the axial direction and penetrates into the connecting portion (54).

4. The quick release inflation device of claim 2,

the core rod (10) comprises a core rod main body (12) and a limiting connecting column (11) which are integrally formed, and a second limiting step (13) is formed at the joint of the limiting connecting column (11) and the core rod main body (12);

the limiting connecting column (11) is provided with the guide groove (111) and the limiting groove (112);

the expansion component (30) is sleeved on the core rod main body (12).

5. The quick release inflation device of claim 4,

the core bar main body (12) comprises a cam connecting part (121), a cylindrical part (122) and a circular table part (123) which are integrally formed; the cylindrical portion (122) is located between the cam connecting portion (121) and the circular truncated portion (123);

the cam connecting part (121) is rotationally connected with the cam handle (20);

the expansion component (30) is movably sleeved on the cylindrical part (122);

the diameter of the end part of the circular table part (123) far away from one end of the cylindrical part (122) is larger than that of the cylindrical part (122);

the limiting connecting column (11) is vertically formed on the end face of the circular table portion (123) and is coaxial with the circular table portion (123).

6. The quick release inflation device of claim 1,

the end cover (50) is connected with the elastic sheet (40) through a safety rope (60).

7. The quick release inflation device as defined in claim 1, wherein the inflation assembly (30) comprises:

the end taper sleeve (31) is movably sleeved on the core rod (10) and can deform along the radial direction; the end cone sleeve (31) is adjacent to the cam handle (20);

the outer taper sleeve (32) is movably sleeved on the core rod (10) and can deform along the radial direction; the outer taper sleeve (32) is positioned between the end taper sleeve (31) and the end of the core rod (10) for connecting the end cover (50); the outer taper sleeve (32) is matched with the end taper sleeve (31) through a taper surface at the end part;

the inner cone sleeve (33) is movably sleeved on the core rod (10) and can deform along the radial direction; the inner taper sleeve (33) is positioned between two adjacent outer taper sleeves (32) and is matched with the outer taper sleeves (32) through the taper surfaces at the end parts;

when the cam handle (20) rotates around the core rod (10) and presses the end taper sleeve (31), the outer taper sleeve (32) and the inner taper sleeve (33) are mutually pressed, so that the end taper sleeve (31) and the inner taper sleeve (33) are inwards contracted to clasp the core rod (10), and the outer taper sleeve (32) is outwards expanded.

8. The quick release inflation device of claim 7,

the end cone sleeve (31) comprises a conical part (312) and a convex edge part (311) integrally formed on the end part of the conical part (312), and the convex edge part (311) protrudes out of the end part of the conical part (312) and faces the cam handle (20);

the outer wall of the conical part (312) is provided with a first conical surface (3121), and the first conical surface (3121) is formed by inclining the outer wall of the end part of the conical part (312) outwards to the convex edge part (311).

9. The quick release expansion device according to claim 7, wherein the outer cone (32) is provided with a second opening (321) extending axially through both ends thereof, and the inner walls of both ends of the outer cone (32) are respectively provided with a second tapered surface (322), and the second tapered surface (322) is formed by inward inclination of the inner walls of the ends of the outer cone (32).

10. The quick release expansion device according to claim 7, wherein a third opening (331) is provided in the inner collar (33) to extend axially through both ends thereof, and third tapered surfaces (332) are provided on outer walls of both ends of the inner collar (33), respectively, the third tapered surfaces (332) being formed by inclining outward from outer walls of the ends of the inner collar (33).

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