CN111577730A - 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; according to the quick-release expansion device, the elastic sheet can be sleeved in the end cover for closing only when the end cover is arranged in place, and the elastic sheet cannot be sleeved in the end cover for closing when the end cover is not arranged in place, so that the potential safety hazard problem existing when the mounting is not in place can be effectively avoided. The quick-release expansion device can realize locking connection and detachment through simple operation of the cam handle, has strong safety, simple operation and strong practicability, and is suitable for wide popularization.

Description

Quick release expansion device

【Technical field】

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

【Background technique】

With the rapid development of aerospace industry, the working environment of aerospace products is getting worse and worse, and ordinary threaded connection by-products cannot meet the requirements of existing aerospace products. High-performance, adjustable and high-matching threaded connection pairs are the general trend. In the design of aerospace parts, it is necessary to reduce the radial clearance of the threaded connection pair to realize the adjustable transition fit or interference fit of the bolt product with the base body. The existing bolt connection is difficult to meet the design requirements, and the processing cost of the bolt is relatively expensive, and multiple assembly and disassembly cycles cannot be realized. The tightening bolt can adjust the radial size without affecting the lubrication and anti-corrosion coating on the surface of the bolt and the base body. It can be used for multiple assembly and disassembly, and at the same time, it can avoid the gap between the assembly caused by the wear of the bolt and the base body, so it is widely used in aviation. Fastening connections in the aerospace field. However, the existing tensioning bolts generally have complicated operations, especially for objects to be connected that need to be hung with beams, and cannot be quickly connected and locked through simple operations.

[Content of the invention]

The present invention aims to solve the above problems, and provides a quick-release expansion device with convenient operation, reliable connection, fast axial locking and avoiding misoperation.

In order to solve the above problems, the present invention provides a quick-release expansion device, which is characterized in that it includes a core rod, a cam handle, an expansion assembly, a shrapnel and an end cover, and the core rod is in the shape of a long axis; the cam handle is rotatably connected at one end of the core rod; the expansion component is movably sleeved on the core rod, which can be squeezed to expand outward and shrink inward to hug the core rod; one end of the elastic sheet is connected to the core rod; The cam handle is connected, and the other end is provided with a connecting hole; the end cover can be connected to the end of the core rod opposite to the cam handle; when the end cover is in the first position, the The end cover can move along the axial direction of the core rod to be separated from the core rod, and the elastic piece cannot be inserted into the end cover through its connecting hole; when the end cover is in the second position, the The end cover forms an axial limit connection with the end of the core rod 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 its connecting hole.

Further, the outer wall of the end of the core rod is provided with a guide groove arranged in the axial direction and a limit groove arranged in the circumferential direction, and the guide groove is extended in the axial direction from the end of the core rod, so The limiting slot is communicated with the guide slot; the end cover is provided with a shaft hole, and a protruding positioning portion is arranged on the inner wall of the shaft hole, and the positioning portion can be snapped into the guide slot and can be removed from the guide slot. The guide groove is rotated into the limit groove; when the positioning part of the end cover is located in the guide groove, the end cover is in the first position state; when the positioning part of the end cover is located in the When inside the limiting groove, the end cover is in the second position state.

Further, the end cover includes an integrally formed cover plate portion and a connecting portion, the outer dimension of the cover plate portion is larger than the outer dimension of the connecting portion, and a first limit step is formed at the joint; the shaft hole is formed by The end portion of the cover plate portion extends in the axial direction and penetrates into the connecting portion.

Further, the core rod includes an integrally formed core rod main body and a limit connection column, and a second limit step is formed at the joint of the limit connection column and the core rod main body; on the limit connection column The guiding groove and the limiting groove are arranged on the upper part; the expansion assembly is sleeved on the main body of the core rod.

Further, the main body of the core rod includes a cam connecting part, a cylindrical part and a circular truncated part; the cylindrical part is located between the cam connecting part and the circular truncated part; the cam connecting part and the cam handle rotatably connected; the expansion assembly is movably sleeved on the cylindrical portion; the diameter of the end of the circular truncated portion away from the cylindrical portion is larger than the diameter of the cylindrical portion; the limit connecting column is vertically formed on the cylindrical portion The end face of the circular truncated portion is coaxial with the circular truncated portion.

Further, the end cap is connected with the elastic piece through a safety cord.

Further, the expansion assembly includes an end cone sleeve, an outer cone sleeve and an inner cone sleeve, the end cone sleeve is movably sleeved on the core rod, and can be deformed radially; the end cone sleeve and the The cam handle is adjacent; the outer cone sleeve is movably sleeved on the core rod and can be deformed in the radial direction; the outer cone sleeve is located at the end of the end cone sleeve and the core rod for connecting the end cover The outer cone sleeve is matched with the end cone sleeve through the conical surface of the end; the inner cone sleeve is movably sleeved on the core rod and can be deformed in the radial direction; the inner cone sleeve The sleeve is located between two adjacent outer cone sleeves, and is matched with the outer cone sleeve through the conical surface of the end; when the cam handle rotates around the core rod and is squeezed to the end cone sleeve, the The end cone sleeve, the outer cone sleeve, and the inner cone sleeve are mutually squeezed, so that the end cone sleeve and the inner cone sleeve are compressed inward to hold the core rod, and the outer cone sleeve is expanded outward.

Further, the end tapered sleeve includes a tapered portion and a protruding edge portion integrally formed on the end portion of the tapered portion, the protruding edge portion protruding from the end portion of the tapered portion and facing the cam handle; The outer wall of the tapered portion is provided with a first tapered surface, and the first tapered surface is formed by the outer wall of the end portion of the tapered portion inclined outward to the flange portion.

Further, the outer cone sleeve is provided with a second opening extending in the axial direction and passing through both ends thereof, and the inner walls of both ends of the outer cone sleeve are respectively provided with second conical surfaces, and the second cone The shaped surface is formed by the inward inclination of the inner wall of the end portion of the outer cone sleeve.

Further, the inner cone sleeve is provided with a third opening extending in the axial direction and penetrating both ends thereof, and third conical surfaces are respectively provided on the outer walls of both ends of the inner cone sleeve, and the third cone The shaped surface is formed by the outward inclination of the end outer wall of the inner cone sleeve.

The beneficial contribution of the present invention is that it effectively solves the above-mentioned problems. The quick-release expansion device of the present invention comprises a core rod, a cam handle, a shrapnel, an end cover and an expansion assembly. The cam handle is rotatably connected to one end of the core rod, and the end cover can be connected to the other end of the core rod; the expansion assembly is movably sleeved on the core rod. On the rod, it can expand outward and contract inward under the action of the cam handle to hold the core rod; 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; For the quick-release expansion device, only when the end cover is installed in place, the shrapnel can be inserted into the end cover to close. When the end cover is not installed in place, the shrapnel cannot be inserted into the end cover to close, so that the unloading can be effectively avoided. security risks that exist. The quick-release expansion device of the present invention can realize locking connection and disassembly through a simple cam handle operation, and has strong safety, simple operation, and strong utility model, which should be vigorously promoted.

【Description of drawings】

Figure 1 is a schematic diagram of the overall structure when it is closed.

Fig. 2 is a sectional view when closed.

Figure 3 is an exploded schematic diagram of the overall structure.

FIG. 4 is a schematic structural diagram of the core rod 10 and the end cap 50 .

FIG. 5 is a schematic structural diagram of the end cap 50 .

Figure 6 is a schematic diagram of the principle when it is opened.

Figure 7 is a schematic diagram of the principle when it is closed.

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

【Detailed ways】

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

As shown in FIGS. 1 to 7 , the main point of the quick-release expansion device of the present invention is that the end of the core rod 10 is provided with an end cover 50 for axial positioning and preventing misoperation. Only when the end cover 50 is installed When the end cover 50 is in place, the elastic piece 40 can be inserted into the end cover 50 to achieve closure; when the end cover 50 is not installed in place, the elastic piece 40 cannot be inserted into the end cover 50; and the end cover 50 is easy to install, so it is easy to operate. , and can be quickly locked, and at the same time is conducive to preventing misoperation, it has strong safety and practicability.

Specifically, as shown in FIGS. 1 to 3 , the quick-release expansion device of the present invention includes a core rod 10 , a cam handle 20 , an expansion assembly 30 , an elastic sheet 40 and an end cover 50 . The cam handle 20 is rotatably connected to one end of the core rod 10, and the end cover 50 can be connected to the other end of the core rod 10; the expansion assembly 30 is movably sleeved on the core rod 10, and can expand outward under the action of the cam handle 20 and Tighten inwardly to hold the core rod 10 tightly; one end of the elastic sheet 40 is connected to the cam handle 20, and the other end of the elastic sheet 40 is provided with a connecting hole 41; when the end cover 50 is not stuck in place, it is in the first In the 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 piece 40 cannot be inserted into the end cover 50 through its connecting hole 41; when When the end cover 50 is stuck in place and is in the second position, the end cover 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 . , the elastic piece 40 can be sleeved on the end cover 50 through its connecting hole 41 .

In order to limit connection with the end cover 50 and prevent misoperation, as shown in FIG. 3 and FIG. The guide groove 111 is disposed along 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 limiting grooves 112 are disposed along the circumferential direction of the core rod 10 and pass through the guide grooves 111 . The specific shapes of the limiting groove 112 and the guiding 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 guide groove 111 to form an L-shaped corner groove. In other embodiments, the limiting slot 112 does not have to be perpendicular to the wire slot.

The number of the limiting grooves 112 and the guiding grooves 111 can be set as required. In this embodiment, two limiting grooves 112 and two guiding grooves 111 are symmetrically provided on the outer wall of the core rod 10 .

Correspondingly, as shown in FIG. 3 , FIG. 4 , and FIG. 5 , the end cover 50 is provided with a shaft hole 51 which can be inserted into the end of the core rod 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 snapped into the guide groove 111 , and can be rotated into the limiting groove 112 by the guide groove 111 .

During installation, as shown in FIGS. 3 and 4 , the shaft hole 51 corresponds to the end of the core rod 10 , so that the positioning portion 52 corresponds to the limit groove 112 , and then the end cover 50 is set along the axial direction of the core rod 10 . Insert the end of the core rod 10, and then rotate the end cover 50, so that the positioning part 52 of the end cover 50 slides from the guide groove 111 to the other end of the limit groove 112, so that the end cover 50 and the core rod 10 form an axial limit. The end cap 50 cannot move axially relative to the core rod 10 (as shown in FIG. 1 ).

When the end cap 50 is sleeved into the end of the core rod 10 and the positioning portion 52 is in the guide groove 111, the end cap 50 is in the state of being stuck in place. At this time, it is in the first position state: the end cap 50 can be opposite to The mandrel 10 is moved axially.

When the end cover 50 is sleeved into the end of the core rod 10 and the positioning portion 52 is in the limiting groove 112, the end cover 50 is in the state of being stuck in place, and at this time it is in the second position state: the end cover 50 cannot face the core rod 10 Make an axial movement.

When the end cover 50 is in the first position, when the cam handle 20 is rotated, the connecting hole 41 on the elastic piece 40 cannot always correspond to the end cover 50, so the elastic piece 40 cannot be inserted into the end cover 50 to achieve closure;

When the end cover 50 is in the second position, when the cam handle 20 is rotated, the connecting hole 41 on the elastic piece 40 can correspond to the end cover 50 , so the elastic piece 40 can be sleeved on the end cover 50 to be closed.

The shapes of the connection holes 41 and the end caps 50 can be set as required, which are not limited to the structures shown in the drawings of this embodiment. For example, the end cap 50 is arranged in an eccentric structure, and when the end cap 50 is rotated, the position of its end changes to be aligned with or staggered from the connecting hole 41 . In this embodiment, as shown in FIG. 1 , FIG. 3 , and FIG. 4 , the connecting hole 41 is a hexagonal hole, but not a regular hexagon; the end of the end cover 50 is a hexagonal nut, but not a regular hexagonal nut; In the first position state, the hexagons of the end cap 50 cannot completely correspond to the hexagons of the connecting holes 41, therefore, the elastic pieces 40 cannot be inserted into the end caps 50; in the second position state, the hexagons of the end caps 50 and the connecting holes 41 The hexagons are completely corresponding to each other. At this time, the elastic piece 40 can be sleeved on the end cover 50.

In order to introduce its structural principle in more detail, in this embodiment, as shown in FIG. 4 , the end cover 50 includes a cover plate portion 53 and a connecting portion 54 formed integrally. The outer dimension of the cover plate portion 53 is larger than that of the connecting portion 54 , and a first limiting step 55 is formed at the joint. The cover plate portion 53 is in the shape of a plate, and is used for axially limiting the object to be connected 100 to prevent the object to be connected 100 from coming out of the quick-release expansion device. The connecting portion 54 is used for connecting with the elastic piece 40 . In this embodiment, the connecting portion 54 is in the shape of a non-regular hexagonal hexagonal nut.

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

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

As shown in FIGS. 3 and 4 , the core rod 10 includes an integrally formed core rod body 12 and a limit connecting column 11 . The core rod body 12 is used for connecting with the cam handle 20 and the expansion assembly 30 . The limit connecting post 11 is used for connecting with the end cap 50 . The outer dimension of the limiting connecting post 11 is smaller than the outer dimension of the core rod main body 12 , so a second limiting step 13 is formed at the joint. The second limiting step 13 can be used for abutting against the cover plate portion 53 of the end cap 50 .

As shown in FIG. 3 and FIG. 4 , the limiting connecting post 11 is cylindrical, which is coaxial with the core rod main body 12 . Two guiding grooves 111 and two limiting grooves 112 are provided 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, the cover plate portion of the end cap 50 53 can abut on the surface of the second limiting step 13 .

As shown in FIGS. 3 and 4 , in order to facilitate the installation of the cam handle 20 and the expansion assembly 30 , the core rod main body 12 includes a cam connecting portion 121 , a cylindrical portion 122 and a circular truncated portion 123 that are integrally formed.

As shown in FIG. 3 and FIG. 4 , the cam connecting portion 121 is used for rotationally connecting the cam handle 20 , and a rotating shaft hole 1211 is formed thereon. The axial direction of the 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 can be set as required. In this embodiment, the cam connecting portion 121 is in the shape of a plate.

As shown in FIG. 3 and FIG. 4 , the cylindrical portion 122 is located between the cam connecting portion 121 and the circular truncated portion 123 , and is used to movably sleeve the expansion assembly 30 . The diameter of the cylindrical portion 122 can be set as required, and should not be larger than the outer dimension of the end cap 50 , that is, the outer dimension of the cover plate portion 53 , so that the end cap 50 can function as an axial limiter.

As shown in FIG. 3 and FIG. 4 , the surface of the circular truncated portion 123 is a tapered surface, which facilitates mutual extrusion with the outer tapered sleeve 32 . The diameter of the end of the circular truncated portion 123 away from the cylindrical portion 122 is larger than the diameter of the cylindrical portion 122 , so that the end of the core rod main body 12 is enlarged. In addition, the diameter of the end portion of the circular truncated portion 123 away from the cylindrical portion 122 should be smaller than the outer dimension of the cover plate portion 53 , so that the end cover 50 can function as an axial limiter.

As shown in FIG. 1 , FIG. 2 , and FIG. 3 , the cam handle 20 is rotatably connected to the end of the core rod 10 . In this embodiment, it is formed by the rotating shaft 70 and the cam connecting portion 121 of the core rod 10 . Turn the connection. 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 , which can rotate around the rotating shaft 70 . The circumferential outer wall of the cam portion 21 has different distances from the rotating shaft 70 . The extension portion 22 is used for connecting with the elastic piece 40 for hanging beam connection.

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

As shown in FIGS. 1 , 2 and 3 , the expansion assembly 30 is used for expansion connection by extrusion, and includes an end cone sleeve 31 , an outer cone sleeve 32 and an inner cone sleeve 33 , which are movably sleeved on the core rod 10 and located between the cam handle 20 and the circular truncated portion 123 . Adjacent parts of the expansion assembly 30 are matched by conical surfaces. When subjected to a pressing force, the adjacent parts are pressed against each other, so that the inner end cone sleeve 31 and the inner cone sleeve 33 are locked inwardly and held tightly. The core rod 10, and the outer cone sleeve 32 on the outside expands outward to expand and tighten the objects 100 to be connected, thereby realizing the function of expansion connection.

As shown in FIG. 1 , FIG. 2 , and FIG. 3 , the end cone sleeve 31 is movably sleeved on the core rod 10 and is 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 sleeve 31 includes an integrally formed conical portion 312 and a flange portion 311 . The protruding edge portion 311 is formed on the end portion of the tapered portion 312 , and the protruding edge portion 311 protrudes from the end portion of the tapered portion 312 . The protruding edge portion 311 is used for axial limiting, and faces the cam handle 20 . A first tapered surface 3121 is provided on the outer wall of the tapered portion 312 . The first tapered surface 3121 is formed by the outer wall of the end portion of the tapered portion 312 inclined outward to the flange portion 311 . In other words, since the end cone sleeve 31 is provided with the first tapered surface 3121 , the end wall of the tapered portion 312 close to the flange portion 311 is thicker, and the end wall away from the flange portion 311 is thinner.

As shown in FIG. 1 , FIG. 2 , and FIG. 3 , the outer cone sleeve 32 is movably sleeved on the core rod 10 , and in this embodiment, it is sleeved on the cylindrical portion 122 . There are at least two outer tapered sleeves 32, and the specific number can be set as required. In this embodiment, there are three outer tapered sleeves 32 in total.

As shown in FIG. 1 , FIG. 2 , and FIG. 3 , the outer cone sleeve 32 is provided with a second opening 321 extending in the axial direction and penetrating both ends thereof; the second opening 321 makes the outer cone sleeve 32 elastic and It can deform radially and expand outward. Second tapered surfaces 322 are respectively provided on the inner walls of both ends of the outer tapered sleeve 32 , and the second tapered surfaces 322 are formed by the inward inclination of the inner walls of the end portions of the outer tapered sleeve 32 . In other words, since the inner wall of the outer cone sleeve 32 is provided with the second tapered surface 322 , the outer cone sleeve 32 has thinner walls at both ends and thicker walls at the middle.

In this embodiment, the inclination angle of the second tapered surface 322 is the same as the inclination angle of the first tapered surface 3121, so the end tapered sleeve 31 and the outer tapered sleeve 32 can pass through the first tapered surface 3121. A tapered surface 3121 cooperates with the second tapered surface 322 . When the end cone sleeve 31 and the outer cone sleeve 32 are matched, the first tapered surface 3121 of the end cone sleeve 31 is fitted with the second cone surface 322 of the outer cone sleeve 32, and the end cone sleeve 31 and the outer cone sleeve 32 can be mutually Extrusion causes the outer cone sleeve 32 to expand outward, and the end cone sleeve 31 shrinks inward to hold the core rod 10 tightly.

In addition, the inclination angle of the second tapered surface 322 is also consistent with the inclination angle of the conical surface of the truncated portion 123 , so the outer tapered sleeve 32 can cooperate with the truncated portion 123 through the second tapered surface 322 . When the outer tapered sleeve 32 cooperates with the truncated portion 123, the second tapered surface 322 of the outer tapered sleeve 32 is in contact with the tapered surface of the truncated portion 123, and the outer tapered sleeve 32 presses the truncated portion 123 so that the outer tapered sleeve 32 faces external expansion.

As shown in FIG. 1 , FIG. 2 , and FIG. 3 , the inner cone sleeve 33 is movably sleeved on the core rod 10 , and in this embodiment, it is sleeved on the cylindrical portion 122 . At least one inner cone sleeve 33 is provided, which is arranged between two adjacent outer cone sleeves 32 . The specific number of the inner tapered sleeves 33 can be set as required. In this embodiment, there are two inner tapered sleeves 33 in total.

As shown in FIG. 1 , FIG. 2 , and FIG. 3 , the inner cone sleeve 33 is provided with a third opening 331 extending in the axial direction and passing through both ends thereof. The third opening 331 makes the inner cone sleeve 33 elastic and can Deforms radially, which in turn can be compressed inward. Third tapered surfaces 332 are respectively provided on the outer walls of both ends of the inner tapered sleeve 33 , and the third tapered surfaces 332 are formed by the outward inclination of the outer walls of the end portions of the inner tapered sleeve 33 . In other words, since the third tapered surface 332 is provided on the outer wall of the inner cone sleeve 33 , the inner cone sleeve 33 has thin walls at both ends and thicker walls in the middle.

In this embodiment, the inclination angle of the third tapered surface 332 is the same as the inclination angle of the second tapered surface 322, so the inner tapered sleeve 33 and the outer tapered sleeve 32 can pass through the second tapered surface 322. The three tapered surfaces 332 cooperate with the second tapered surface 322 . When the inner cone sleeve 33 and the outer cone sleeve 32 are matched, the third conical surface 332 of the inner cone sleeve 33 is fitted with the second cone surface 322 of the outer cone sleeve 32, and the inner cone sleeve 33 and the outer cone sleeve 32 can be mutually Extrusion causes the outer cone sleeve 32 to expand outward, and the inner cone sleeve 33 shrinks inward to hold the core pin tightly.

Thereby, as shown in FIGS. 1 , 2 and 3 , the quick-release expansion shape of the present invention is formed: one end of the core rod 10 is rotatably connected to the cam handle 20 , and the other end can be connected to the end cover 50 ; one end of the elastic sheet 40 Connected with the cam handle 20, the other end is provided with a connecting hole 41 and can be sleeved on the end cover 50; the expansion assembly 30 composed of the end cone sleeve 31, the outer cone sleeve 32 and the inner cone sleeve 33 is sleeved on the core rod 10, It is located between the cam handle 20 and the end cover 50, which can be retracted inward to hold the core rod 10, and can be expanded outward to tighten the object to be connected 100; the end cover 50 can be connected to the limit connection of the core rod 10 On the column 11; the end cover 50 is provided with a positioning portion 52, and the limit connecting column 11 is provided with a guide groove 111 and a limit groove 112, so the end cover 50 can be snapped into the limit groove 112 along the guide groove 111. Axial limit connection is realized; when the end cover 50 is not locked in place, it is in the first position state: the positioning portion 52 of the end cover 50 is located in the guide groove 111, and the end cover 50 can move axially relative to the core rod 10. This When the elastic piece 40 cannot be inserted into the end cover 50 through its connecting hole 41; when the end cover 50 is locked in place, it is in the second position state: the positioning portion 52 of the end cover 50 is located in the limiting groove 112, and the end cover 50 The axial limit connection is formed with the core rod 10 , and the end cover 50 cannot move axially relative to the core rod 10 . At this time, the elastic piece 40 can be sleeved on the end cover 50 through its connecting hole 41 .

The quick-release expansion device of the present invention is used for being inserted into the installation hole of the object 100 to be connected. When in use, first open the quick-release expansion device so that the elastic sheet 40 is not sleeved on the end cover 50, and remove the end cover 50 from the core rod 10; then insert the core rod 10 into the installation hole to be connected object 100 (as shown in FIG. 6 ), and install the end cap 50 on the limit connecting post 11 of the core rod 10, so that the end cap 50 is installed in place and is in the second position; then turn the cam handle 20 to The elastic piece 40 hangs on the end cap 50 for closing (as shown in FIG. 7 ). During this process, the cam handle 20 squeezes the end cone sleeve 31, so that the expansion assembly 30 is squeezed and deformed. At this time, the end cone sleeve 31 and the inner cone sleeve 33 are squeezed and locked inward to hold the core rod 10 tightly, and the outer The taper sleeve 32 expands outward to form an interference fit with the mounting hole of the object to be connected 100 to expand and tighten the object to be connected 100 ; while the flange portion 311 of the end taper sleeve 31 and the cover plate portion 53 of the end cover 50 are in the axial direction The object 100 to be connected is further limited to prevent the object to be connected 100 from slipping off, thereby achieving an axial locking effect and ensuring connection safety.

When it is necessary to disassemble, remove the elastic piece 40 from the end cap 50, then remove the end cap 50 and turn the cam handle 20 (as shown in FIG. 6) to loosen the expansion assembly 30, and then the quick release expansion device can be removed from the to-be-connected The object 100 is pulled out from the mounting hole.

In the quick-release expansion device of the present invention, only when the end cover 50 is installed in place, the elastic piece 40 can be inserted into the end cover 50 for closing (as shown in FIG. 1 , FIG. 2 , and FIG. 7 ). When the end cover 50 is not installed in place, , the shrapnel 40 cannot be inserted into the end cover 50 to be closed, so that the potential safety hazard problem that exists when the mounting is not in place can be effectively avoided. The quick-release expansion device of the present invention can realize locking connection and disassembly through the simple operation of the cam handle 20, and has strong safety, simple operation, and strong utility model, and should be vigorously promoted.

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 by similar or equivalent elements known to those skilled in the art without departing from the concept of the present 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 (313) integrally formed on the end part of the conical part (312), and the convex edge part (313) 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 (313).

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 joint 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 outwardly from outer walls of the ends of the inner collar (33).

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