CN111577730B - Quick release expansion device - Google Patents
Quick release expansion device Download PDFInfo
- Publication number
- CN111577730B CN111577730B CN202010455494.8A CN202010455494A CN111577730B CN 111577730 B CN111577730 B CN 111577730B CN 202010455494 A CN202010455494 A CN 202010455494A CN 111577730 B CN111577730 B CN 111577730B
- Authority
- CN
- China
- Prior art keywords
- core rod
- end cover
- cone sleeve
- sleeve
- cam handle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/045—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front having axially compressing parts allowing the clamping of an object tightly to the wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
- F16B13/066—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/08—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation
- F16B13/0808—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation by a toggle-mechanism
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/08—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation
- F16B13/0858—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation with an expansible sleeve or dowel body driven against a tapered or spherical expander plug
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/10—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate gripping parts moved into their final position in relation to the body of the device by a separate operation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
一种快卸膨胀装置，其特征在于，其包括芯杆、凸轮手柄、弹片、端盖及膨胀组件，凸轮手柄转动连接于芯杆的一端，端盖可连接于芯杆的另一端；膨胀组件活动套设于芯杆上，其可在凸轮手柄的作用下向外膨胀以及向内缩紧而抱紧所述芯杆；弹片的一端与所述凸轮手柄连接，弹片的另一端上设有连接孔；本发明的快卸膨胀装置，只有端盖装入到位时，弹片才能套入端盖进行闭合，当端盖未装入到位时，弹片无法套入端盖进行闭合，这样，便可有效避免挂载未到位时存在的安全隐患问题。本发明的快卸膨胀装置，可以通过简单的凸轮手柄操作实现锁定连接及拆卸，其安全性强，操作简单，具有很强的实用新，宜大力推广。
A quick-release expansion device, characterized in that it includes a core rod, a cam handle, a spring, an end cover and an expansion assembly, wherein 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, and can expand outwards and contract inwards to hold the core rod under the action of the cam handle; one end of the spring is connected to the cam handle, and a connecting hole is provided on the other end of the spring; the quick-release expansion device of the present invention can only be inserted into the end cover for closing when the end cover is installed in place, and when the end cover is not installed in place, the spring cannot be inserted into the end cover for closing, thus effectively avoiding the potential safety hazard when the mounting is not in place. The quick-release expansion device of the present invention can be locked, connected and disassembled by simple cam handle operation, has strong safety, simple operation, strong practicality and novelty, and should be vigorously promoted.
Description
[ Field of technology ]
The invention relates to a connecting piece, in particular to a quick-release expansion device.
[ Background Art ]
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 threaded connection pairs with high performance and adjustable high matching precision tend to be large. In the design of the aerospace vehicle parts, the radial clearance of a threaded connection pair needs to be reduced, and the adjustable transition fit or interference fit between a bolt product and a matrix is realized. The existing bolt connecting piece is difficult to meet the design requirement, the processing cost of the bolt is relatively high, and the bolt cannot be assembled, disassembled and recycled for multiple times. The radial dimension of the tensioning bolt can be adjusted, so that the lubrication and anti-corrosion coating on the surfaces of the bolt and the matrix are not affected, the tensioning bolt can be assembled and disassembled for multiple times, and meanwhile, the gap between the bolt and the matrix due to abrasion can be avoided, so that the tensioning bolt is widely applied to fastening connection in the aerospace field. The existing tension bolts are complex in operation generally, and particularly for objects to be connected needing hanging beams, connection and locking cannot be achieved rapidly through simple operation.
[ Invention ]
The invention aims to solve the problems and provide the quick-release expansion device which is convenient to operate, reliable in connection, capable of quickly performing axial locking and avoiding misoperation.
The invention provides a quick-release expansion device which is characterized by comprising a core rod, a cam handle, an expansion assembly, a spring piece and an end cover, wherein the core rod is in a long shaft shape, the cam handle is rotationally connected to one end of the core rod, the expansion assembly is movably sleeved on the core rod and can be extruded to expand outwards and retract inwards to tightly hold the core rod, one end of the spring piece is connected with the cam handle, the other end of the spring piece is provided with a connecting hole, the end cover can be connected to the end part of the core rod, opposite to the cam handle, the end cover can move along the axial direction of the core rod to be separated from the core rod when the end cover is in a first position state, the spring piece cannot be sleeved on the end cover through the connecting hole, and when the end cover is in a second position state, the end cover and the end part of the core rod form axial limiting connection so that the end cover cannot be separated from the core rod along the axial direction of the core rod, and the spring piece can be sleeved on the end cover through the connecting hole.
The end cover is characterized in that the outer wall of the end part of the core rod is provided with a guide groove and a limit groove, the guide groove is axially arranged, the limit groove extends from the end part of the core rod and penetrates through the guide groove, the end cover is provided with a shaft hole, the inner wall of the shaft hole is provided with a protruding positioning part, the positioning part can be clamped into the guide groove and can rotate into the limit 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, and when the positioning part of the end cover is positioned in the limit 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, a first limit step is formed at the joint of the cover plate part and the connecting part, and the shaft hole extends from the end part of the cover plate part along the axial direction and penetrates into the connecting part.
The core rod comprises a core rod main body and a limiting connecting column which are integrally formed, 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, and the expansion assembly is sleeved on the core rod main body.
The core rod comprises a core rod body, a cam handle, an expansion assembly, a limit connecting column and a limit connecting column, wherein the core rod body comprises a cam connecting portion, a cylindrical portion and a round table portion which are integrally formed, the cylindrical portion is located between the cam connecting portion and the round table portion, the cam connecting portion is in rotary connection with the round table portion, the expansion assembly is movably sleeved on the cylindrical portion, the diameter of the end portion, far away from the cylindrical portion, of the round table portion is larger than that of the cylindrical portion, and the limit connecting column is vertically formed on the end face of the round table portion and is coaxial with the round table portion.
Further, the end cover is connected with the elastic sheet through a safety rope.
The expansion assembly further comprises an end taper sleeve, an outer taper sleeve and an inner taper sleeve, wherein the end taper sleeve is movably sleeved on the core rod and can deform in the radial direction, the end taper sleeve is adjacent to the cam handle, the outer taper sleeve is movably sleeved on the core rod and can deform in 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 being connected with the end cover, the outer taper sleeve is matched with the end taper sleeve through a taper surface of the end part, the inner taper sleeve is movably sleeved on the core rod and can deform in the radial direction, the inner taper sleeve is positioned between two adjacent outer taper sleeves and is matched with the outer taper sleeve through a taper surface of the end part, and when the cam handle rotates around the core rod and is extruded to 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 contracted inwards to hold the core rod tightly, and the outer taper sleeve is expanded outwards.
The end cone sleeve comprises a cone-shaped part and a convex edge part integrally formed on the end part of the cone-shaped part, wherein the convex edge part protrudes out of the end part of the cone-shaped part and faces the cam handle, a first cone surface is arranged on the outer wall of the cone-shaped part, and the first cone surface is formed by outwards inclining the outer wall of the end part of the cone-shaped part to the convex edge part.
Further, the outer taper sleeve is provided with a second opening extending along the axial direction and penetrating through two ends of the outer taper sleeve, two inner walls of the two ends of the outer taper sleeve are respectively provided with a second taper surface, and the second taper surfaces are formed by inwards inclining the inner walls of the end parts of the outer taper sleeve.
Further, a third opening extending along the axial direction and penetrating through two ends of the inner taper sleeve is formed in the inner taper sleeve, third taper surfaces are respectively arranged on the outer walls of the two ends of the inner taper sleeve, and the third taper surfaces are formed by outwards inclining the outer walls of the end parts of the inner taper sleeve.
The present invention has an advantageous contribution in that it effectively solves the above-mentioned problems. The quick-release expansion device comprises a core rod, a cam handle, a spring plate, an end cover and an expansion assembly, wherein the cam handle is rotatably connected to one end of the core rod, the end cover can be connected to the other end of the core rod, the expansion assembly 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 spring plate is connected with the cam handle, and the other end of the spring plate is provided with a connecting hole. The quick-release expansion device can realize locking connection and disassembly through simple cam handle operation, has strong safety, is simple to operate, has strong practicability and is suitable for being widely popularized.
[ Description of the drawings ]
Fig. 1 is a schematic view of the whole structure when closed.
Fig. 2 is a cross-sectional view when closed.
Fig. 3 is an exploded view of the overall structure.
Fig. 4 is a schematic diagram of the core 10 and end cap 50.
Fig. 5 is a schematic structural view of the end cap 50.
Fig. 6 is a schematic diagram of the principle when opened.
Fig. 7 is a schematic diagram of the principle when closed.
The drawing shows a core rod 10, a limit connecting column 11, a guide groove 111, a limit groove 112, a core rod main body 12, a cam connecting part 121, a rotating shaft hole 1211, a cylindrical part 122, a round platform part 123, a second limit 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, a spring plate 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 limit step 55, a safety rope 60, a rotating shaft 70 and an object to be connected 100.
[ Detailed description ] of the invention
The following examples are further illustrative and supplementary of the present invention and are not intended to limit the invention in any way.
As shown in fig. 1 to 7, the quick-release expansion device of the invention has the main key points that the end part of the core rod 10 is provided with the end cover 50 for axial limiting and misoperation prevention, the elastic sheet 40 can be sleeved on the end cover 50 to realize closing only when the end cover 50 is put in place, the elastic sheet 40 can not be sleeved on the end cover 50 when the end cover 50 is not put in place, and the end cover 50 is convenient and simple to install, so that the quick-release expansion device is convenient to operate and quick to lock, is beneficial to misoperation prevention, and has high safety and practicability.
Specifically, as shown in fig. 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, a spring 40 and an end cap 50. The cam handle 20 is rotatably connected to one end of the core rod 10, 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 outwards and retract inwards to tightly hold the core rod 10 under the action of the cam handle 20, one end of the elastic sheet 40 is connected with the cam handle 20, a connecting hole 41 is formed in the other end of the elastic sheet 40, when the end cover 50 is not clamped in place and 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, the elastic sheet 40 cannot be sleeved on the end cover 50 through the connecting hole 41, and when the end cover 50 is clamped in place and is in a second position state, the end cover 50 and the end 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.
For the limited connection with the end cap 50 and for preventing the erroneous operation, as shown in fig. 3 and 4, a guiding groove 111 and a limiting groove 112 are provided on the outer wall of the end portion of the core bar 10. The guide groove 111 is provided along the axial direction of the core bar 10, and is formed by extending the end of the core bar 10 along the axial direction. The limit groove 112 is provided along the circumferential direction of the core bar 10, and penetrates the guide groove 111. The specific shapes of the limiting groove 112 and the guide groove 111 are not limited, and they are mutually communicated 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 limit slot 112 need not be perpendicular to the wire slot.
The number of the limiting grooves 112 and the number of the guiding grooves 111 can be set according to the requirement, in this embodiment, 2 limiting grooves 112 and 2 guiding 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 is inserted into the end of the core rod 10. In order to cooperate with the limit groove 112 and the guide 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, and is capable of being locked into the guiding slot 111 and being rotated into the limiting slot 112 from the guiding slot 111.
In the installation, as shown in fig. 3 and 4, the shaft hole 51 corresponds to the end of the core 10, the positioning portion 52 corresponds to the limiting groove 112, then the end cap 50 is sleeved on the end of the core 10 along the axial direction of the core 10, and then the end cap 50 is rotated, so that the positioning portion 52 of the end cap 50 slides from the guiding groove 111 to the other end of the limiting groove 112, thereby the end cap 50 and the core 10 form an axial limiting connection, and the end cap 50 cannot axially move relative to the core 10 (as shown in fig. 1).
When the end cap 50 is sleeved into the end of the core rod 10 and the positioning part 52 of the end cap is positioned in the guide groove 111, the end cap 50 is in a clamped state, and at the moment, the end cap 50 is in a first position state, namely, the end cap 50 can axially move relative to the core rod 10.
When the end cap 50 is sleeved into the end of the core rod 10 and the positioning part 52 is positioned in the limiting groove 112, the end cap 50 is in a clamped state, and is in a second position state in which the end cap 50 cannot axially move relative to the core rod 10.
When the end cover 50 is in the first position state, the connecting hole 41 on the elastic sheet 40 cannot correspond to the end cover 50 all the time when the cam handle 20 is rotated, so that the elastic sheet 40 cannot be sleeved on the end cover 50 to realize closing;
When the end cap 50 is in the second position, the connecting hole 41 on the elastic piece 40 can correspond to the end cap 50 when the cam handle 20 is rotated, so that the elastic piece 40 can be sleeved on the end cap 50 to realize closing.
The shapes of the connecting hole 41 and the end cap 50 may be set as required, 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 configuration, and when the end cap 50 is rotated, its end position is changed to be aligned with or offset from the connection hole 41. In this embodiment, as shown in fig. 1, 3 and 4, the connecting hole 41 is a hexagonal hole, but not a regular hexagonal hole, the end of the end cap 50 is a hexagonal nut, but not a regular hexagonal nut, the hexagonal of the end cap 50 cannot be completely corresponding to the hexagonal of the connecting hole 41 in the first position state, and therefore the elastic piece 40 cannot be sleeved on the end cap 50, and the hexagonal of the end cap 50 completely corresponds to the hexagonal of the connecting hole 41 in the second position state, and at this time, the elastic piece 40 can be sleeved on the end cap 50.
To describe the structural principle in more detail, in this embodiment, as shown in fig. 4, the end cap 50 includes a cover plate portion 53 and a connecting portion 54 that are integrally formed. The outer peripheral dimension of the cover plate 53 is larger than that of the connecting portion 54, and a first limiting step 55 is formed at the joint of the cover plate and the connecting portion. The cover plate 53 is in a plate shape, and is used for axially limiting the object 100 to be connected, so as to prevent the object 100 to be connected from falling out of the quick-release expansion device. The connecting portion 54 is used for connecting with the spring 40. In this embodiment, the connecting portion 54 has a hexagonal nut shape other than a regular hexagon.
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, in this embodiment, on the cover portion 53, and is flush with the end of the cover portion 53 and protrudes from the inner wall of the shaft hole 51.
As shown in fig. 2 and 3, to prevent the end cap 50 from being lost, a safety rope 60 is connected to the end cap 50. The safety line 60 is connected to the end cap 50 in a known manner. The other end of the safety rope 60 is connected to the elastic sheet 40, so that the end cap 50 will not fall off when it is released, thereby preventing loss.
As shown in fig. 3 and 4, the core rod 10 includes a core rod body 12 and a stopper rod 11 integrally formed. The stem body 12 is adapted to be coupled to the cam handle 20 and the expansion assembly 30. The limit connection post 11 is used for connecting with the end cover 50. The outer dimension of the limit connecting post 11 is smaller than the outer dimension of the core rod main body 12, so that a second limit step 13 is formed at the joint of the limit connecting post and the core rod main body. The second limiting step 13 may be used to abut against the cover plate portion 53 of the end cap 50.
As shown in fig. 3 and 4, the limit connecting post 11 has a cylindrical shape and is coaxial with the core rod main body 12. Two guide grooves 111 and two limit grooves 112 are arranged on the outer wall of the limit 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 locked in place and is in the second position, the cover plate 53 of the end cap 50 can abut against the surface of the second limiting step 13.
As shown in fig. 3 and 4, for convenience of installing the cam handle 20 and the expansion assembly 30, the core rod body 12 includes a cam connecting portion 121, a cylindrical portion 122 and a circular truncated cone portion 123 integrally formed.
As shown in fig. 3 and 4, the cam connecting portion 121 is configured to rotatably connect to the cam handle 20, and has a rotation shaft hole 1211 formed therein. The axial direction of the rotation shaft hole 1211 is perpendicular to the axial direction of the core pin body 12. The specific shape of the cam connection part 121 is not limited, and it may be provided as needed. In this embodiment, the cam connection portion 121 has a plate shape.
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 may be set as required, and should be not greater 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 an axial limiting function.
As shown in fig. 3 and 4, the surface of the truncated cone 123 is a conical surface, which facilitates the extrusion with the outer cone sleeve 32. The diameter of the end of the truncated cone 123, which is far from the cylindrical portion 122, is larger than the diameter of the cylindrical portion 122, so that the end of the core rod body 12 is expanded. In addition, the diameter of the end of the truncated cone portion 123 away from the cylindrical portion 122 should be smaller than the outer peripheral dimension of the cover plate portion 53, so that the end cap 50 can perform an axial limiting function.
As shown in fig. 1, 2 and 3, the cam handle 20 is rotatably connected to the end of the core 10, and in this embodiment, is rotatably connected to the cam connection portion 121 of the core 10 through a rotation shaft 70. The cam handle 20 includes an integrally formed cam portion 21 and an extension 22. The cam portion 21 is rotatably connected to the cam connecting portion 121, and is rotatable about the rotation shaft 70. The outer circumferential wall of the cam portion 21 is not equidistant from the rotation shaft 70. The extension 22 is adapted to connect with the spring 40 for a joist connection.
As shown in fig. 1, 2 and 3, one end of the elastic piece 40 is connected with the extension portion 22 of the cam handle 20, the other end thereof is provided with a connecting hole 41, and the end of the elastic piece 40 provided with the connecting hole 41 can be sleeved on the end cover 50 to be closed so as to realize hanging beam connection. The material of the spring 40 may be selected according to the requirement, for example, a metal material. The shape of the elastic sheet 40 may be set according to needs, and in this embodiment, the elastic sheet 40 and the extension 22 form a U-shaped structure, which is beneficial to hanging beams. The shape of the connecting hole 41 may be set according to the need, 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 is used for expansion connection by extrusion, and comprises an end cone sleeve 31, an outer cone sleeve 32 and an inner cone sleeve 33, wherein the movable sleeve is arranged on the core rod 10 and is positioned between the cam handle 20 and the round platform 123. Adjacent parts of the expansion assembly 30 are matched through conical surfaces, when the adjacent parts are subjected to extrusion force, the adjacent parts are mutually extruded, so that the inner end cone sleeve 31 and the inner cone sleeve 33 are locked inwards to hold the core rod 10 tightly, and the outer cone sleeve 32 on the outer side is expanded outwards to expand the object 100 to be connected, and the expansion connection effect is realized.
As shown in fig. 1,2 and 3, the end cone 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 31 includes an integrally formed tapered portion 312 and a flange portion 311. The flange 311 is formed on an end of the tapered portion 312, and the flange 311 protrudes from the end of the tapered portion 312. The flange 311 is used for axial limiting, 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 of the tapered portion 312 being inclined outwardly to the flange portion 311. In other words, since the first taper surface 3121 is provided on the end cone 31, one end of the taper portion 312 near the flange portion 311 is thick, and one end far from the flange portion 311 is thin.
As shown in fig. 1,2 and 3, the outer cone sleeve 32 is movably sleeved on the core rod 10, and in this embodiment, is sleeved on the cylindrical portion 122. The outer cone sleeve 32 is provided with at least two, and the specific number of the outer cone sleeves can be set according to the requirement. In this embodiment, a total of 3 outer cones 32 are provided.
As shown in fig. 1, 2 and 3, the outer cone sleeve 32 is provided with a second opening 321 extending axially and penetrating through two ends of the outer cone sleeve, and the second opening 321 enables the outer cone sleeve 32 to have elasticity and deform radially so as to expand outwards. Second tapered surfaces 322 are respectively provided on inner walls of both ends of the outer cone sleeve 32, and the second tapered surfaces 322 are formed by inwardly inclining inner walls of the end portions of the outer cone sleeve 32. In other words, the second tapered surface 322 is provided on the inner wall of the outer cone sleeve 32, so that the two end walls of the outer cone sleeve 32 are thin, and the middle wall is thick.
In this embodiment, the inclination angle of the second conical surface 322 is identical to the inclination angle of the first conical surface 3121, so that the end cone 31 and the outer cone 32 can be engaged with the second conical surface 322 through the first conical surface 3121. When the end cone 31 is matched with the outer cone 32, the first cone surface 3121 of the end cone 31 is matched with the second cone surface 322 of the outer cone 32, the end cone 31 and the outer cone 32 can be mutually extruded to enable the outer cone 32 to expand outwards, and the end cone 31 is contracted inwards to hug the core rod 10.
In addition, the inclination angle of the second tapered surface 322 is also identical to the inclination angle of the tapered surface of the circular truncated cone 123, so that the outer cone 32 can be engaged with the circular truncated cone 123 through the second tapered surface 322. When the outer cone sleeve 32 is matched with the round platform 123, the second conical surface 322 of the outer cone sleeve 32 is matched with the conical surface of the round platform 123, and the outer cone sleeve 32 presses the round platform 123 to enable the outer cone sleeve 32 to expand outwards.
As shown in fig. 1,2 and 3, the inner cone sleeve 33 is movably sleeved on the core rod 10, and in this embodiment, is sleeved on the cylindrical portion 122. The inner cone sleeve 33 is provided with at least one, which is arranged between two adjacent outer cone sleeves 32. The specific number of the inner cones 33 may be set as required, and in this embodiment, 2 inner cones 33 are provided.
As shown in fig. 1,2 and 3, the inner cone sleeve 33 is provided with a third opening 331 extending axially through both ends thereof, and the third opening 331 allows the inner cone sleeve 33 to be elastically deformed in a radial direction so as to be inwardly contracted. Third tapered surfaces 332 are respectively provided on outer walls of both ends of the inner cone sleeve 33, and the third tapered surfaces 332 are formed by outwardly inclining outer walls of the end portions of the inner cone sleeve 33. In other words, since the third tapered surface 332 is provided on the outer wall of the inner cone sleeve 33, both end walls of the inner cone sleeve 33 are made thin, and the middle part is made thick.
In this embodiment, the inclination angle of the third tapered surface 332 is identical to the inclination angle of the second tapered surface 322, so that the inner and outer tapered sleeves 33 and 32 can be engaged with the second tapered surface 322 through the third tapered surface 332. When the inner cone sleeve 33 is matched with the outer cone sleeve 32, the third cone surface 332 of the inner cone sleeve 33 is matched with the second cone surface 322 of the outer cone sleeve 32, the inner cone sleeve 33 and the outer cone sleeve 32 can be mutually extruded to enable the outer cone sleeve 32 to expand outwards, and the inner cone sleeve 33 is contracted inwards to hold the core pin tightly.
As shown in FIGS. 1,2 and 3, the quick-release expansion structure is formed by rotatably connecting one end of a core rod 10 with a cam handle 20 and the other end of the core rod 10 with an end cover 50, connecting one end of a spring plate 40 with the cam handle 20 and the other end of the spring plate being provided with a connecting hole 41 for being sleeved on the end cover 50, sleeving an expansion assembly 30 consisting of an end taper sleeve 31, an outer taper sleeve 32 and an inner taper sleeve 33 on the core rod 10, being positioned between the cam handle 20 and the end cover 50, being capable of being retracted inwards to hold the core rod 10 and being expanded outwards to expand an object 100 to be connected, connecting the end cover 50 with a limit connecting column 11 of the core rod 10, arranging a positioning part 52 on the end cover 50, arranging a guide groove 111 and a limit groove 112 on the limit connecting column 11, so that the end cover 50 can be clamped into the limit groove 112 along the guide groove 111 to realize axial limit connection, and when the end cover 50 is not clamped in place, 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, the end cover 50 can not be clamped in the first position, and the end cover 50 can not be axially clamped into the limit groove 50 through the guide groove 111, and the end cover 50 can not be positioned axially and can be clamped into the limit groove 50 by the limit groove 50.
The quick release expansion device of the present invention is used by being inserted into the mounting hole of the object 100 to be connected. When in use, the quick release expansion device is opened, so that the elastic sheet 40 is not sleeved on the end cover 50, the end cover 50 is removed from the core rod 10, then the core rod 10 is inserted into the object 100 to be connected in alignment with the mounting hole (as shown in fig. 6), the end cover 50 is installed on the limit connecting column 11 of the core rod 10, so that the end cover 50 is installed in place and is in the second position state, and then the cam handle 20 is rotated, so that the elastic sheet 40 is hung on the end cover 50 to be closed (as shown in fig. 7). In the process, the cam handle 20 presses the end cone sleeve 31, so that the expansion assembly 30 is pressed and deformed, at this time, the end cone sleeve 31 and the inner cone sleeve 33 are pressed and locked inwards to hold the core rod 10, the outer cone sleeve 32 is expanded outwards to form interference fit with the mounting hole of the object 100 to be connected so as to expand the object 100 to be connected, and the protruding edge part 311 of the end cone sleeve 31 and the cover plate part 53 of the end cover 50 limit the object 100 to be connected further in the axial direction, so that the object 100 to be connected is prevented from slipping, the axial locking effect is realized, and the connection safety is ensured.
When disassembly is required, the spring 40 is removed from the end cap 50, and then the end cap 50 is removed and the cam handle 20 is rotated (as shown in fig. 6) to release the expansion assembly 30, so that the quick release expansion device can be withdrawn from the mounting hole of the article 100 to be connected.
In the quick-release expansion device, the elastic sheet 40 can be sleeved into the end cover 50 for closing only when the end cover 50 is installed in place (as shown in fig. 1, 2 and 7), and the elastic sheet 40 can not be sleeved into the end cover 50 for closing when the end cover 50 is not installed in place, so that the problem of potential safety hazard when the mounting is not in place can be effectively avoided. The quick-release expansion device can realize locking connection and disassembly through simple operation of the cam handle 20, has strong safety, simple operation, strong practicability and practicability, and is suitable for great popularization.
Although the present invention has been disclosed by the above embodiments, the scope of the present invention is not limited thereto, and each of the above components may be replaced with similar or equivalent elements known to those skilled in the art without departing from the spirit of the present invention.
Claims (8)
1. A quick release expansion device, comprising:
A core bar (10) having a long axis shape;
a cam handle (20) rotatably connected to one end of the core bar (10);
The expansion assembly (30) is movably sleeved on the core rod (10) and can be extruded to expand outwards and retract inwards to hold the core rod (10);
A spring plate (40), one end of which is connected with the cam handle (20), and the other end of which is provided with a connecting hole (41);
An end cap (50) connectable to an end of the core bar (10) opposite the cam handle (20);
The end cap (50) is rotatable on the core rod (10) from a first position to a second position;
When the end cover (50) is in a first position state on the core bar (10), the end cover (50) can move along the axial direction of the core bar (10) to be separated from the core bar (10), and the elastic sheet (40) cannot be sleeved on the end cover (50) through the connecting hole (41) when the cam handle (20) is rotated;
when the end cover (50) is in a second position state on the core rod (10), 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 a connecting hole (41) when the cam handle (20) is rotated;
A guide groove (111) arranged along the axial direction and a limit groove (112) arranged along the circumferential direction are arranged on the outer wall of the end part of the core bar (10), the guide groove (111) extends along the axial direction from the end part of the core bar (10), and the limit 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 limit 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, and when the positioning part (52) of the end cover (50) is positioned in the limit groove (112), the end cover (50) is in a second position state;
the expansion assembly (30) comprises:
the end taper sleeve (31) is movably sleeved on the core bar (10) and can deform along the radial direction, and the end taper sleeve (31) is adjacent to the cam handle (20);
The outer cone sleeve (32) is movably sleeved on the core rod (10) and can deform along the radial direction, and the outer cone sleeve (32) is positioned between the end cone sleeve (31) and the end part of the core rod (10) for connecting the end cover (50);
The inner cone sleeve (33) is movably sleeved on the core rod (10) and can deform along the radial direction, and the inner cone sleeve (33) is positioned between two adjacent outer cone sleeves (32) and is matched with the outer cone sleeves (32) through the conical surface at the end part;
When the cam handle (20) rotates around the core rod (10) and is extruded to the end cone sleeve (31), the outer cone sleeve (32) and the inner cone sleeve (33) are mutually extruded, so that the end cone sleeve (31) and the inner cone sleeve (33) are contracted inwards to tightly hold the core rod (10), and the outer cone sleeve (32) is expanded outwards.
2. A quick release expansion device as claimed in claim 1, characterized in that,
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 limit step (55) is formed at the joint of the cover plate part and the connecting part;
The shaft hole (51) extends axially from the end of the cover plate (53) and penetrates into the connecting portion (54).
3. A quick release expansion device as claimed in claim 1, characterized in that,
The core bar (10) comprises a core bar main body (12) and a limit connecting column (11) which are integrally formed, and a second limit step (13) is formed at the joint of the limit connecting column (11) and the core bar main body (12);
the limiting connecting column (11) is provided with the guide groove (111) and the limiting groove (112);
The expansion assembly (30) is sleeved on the core rod main body (12).
4. A quick release expansion device as claimed in claim 3, characterized in that,
The core rod main body (12) comprises a cam connecting part (121), a cylindrical part (122) and a round platform part (123) which are integrally formed, wherein the cylindrical part (122) is positioned between the cam connecting part (121) and the round platform part (123);
the cam connecting part (121) is rotationally connected with the cam handle (20);
the expansion assembly (30) is movably sleeved on the cylindrical part (122);
The diameter of the end part of the round table part (123) far away from the cylindrical part (122) is larger than the diameter of the cylindrical part (122);
The limiting connecting column (11) is vertically formed on the end face of the round table part (123) and is coaxial with the round table part (123).
5. A quick release expansion device as claimed in claim 1, characterized in that,
The end cover (50) is connected with the elastic sheet (40) through a safety rope (60).
6. A quick release expansion device as claimed in claim 1, characterized in that,
The end cone sleeve (31) comprises a cone portion (312) and a convex edge portion (313) integrally formed on the end portion of the cone portion (312), wherein the convex edge portion (313) protrudes out of the end portion of the cone portion (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 the outer wall of the end part of the conical part (312) inclining outwards to the convex edge part (313).
7. A quick release expansion device according to claim 1, wherein the outer cone sleeve (32) is provided with a second opening (321) extending axially through both ends thereof, and both inner walls of the outer cone sleeve (32) are respectively provided with a second conical surface (322), and the second conical surfaces (322) are formed by inward tilting of the inner walls of the ends of the outer cone sleeve (32).
8. A quick release expansion device according to claim 1, wherein a third opening (331) extending axially through both ends of the inner cone sleeve (33) is provided in the inner cone sleeve (33), and third conical surfaces (332) are provided on both outer walls of the inner cone sleeve (33), respectively, the third conical surfaces (332) being formed by the outer walls of the ends of the inner cone sleeve (33) being inclined outwardly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010455494.8A CN111577730B (en) | 2020-05-26 | 2020-05-26 | Quick release expansion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010455494.8A CN111577730B (en) | 2020-05-26 | 2020-05-26 | Quick release expansion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111577730A CN111577730A (en) | 2020-08-25 |
| CN111577730B true CN111577730B (en) | 2025-03-04 |
Family
ID=72121520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010455494.8A Active CN111577730B (en) | 2020-05-26 | 2020-05-26 | Quick release expansion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111577730B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992228B (en) | 2022-07-07 | 2023-02-17 | 深圳亚太航空技术股份有限公司 | Quick-release connecting device |
| CN115030946B (en) * | 2022-07-07 | 2025-02-07 | 深圳亚太航空技术股份有限公司 | Pin-type quick-release expansion device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211259310U (en) * | 2019-12-05 | 2020-08-14 | 中国直升机设计研究所 | Quick-release diameter-adjustable bolt capable of bearing pull shear |
| CN213017161U (en) * | 2020-05-26 | 2021-04-20 | 深圳亚太航空技术有限公司 | Quick-release expansion device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2573928A (en) * | 1948-05-20 | 1951-11-06 | Oskar E Peter | Clamping system |
| US4488842A (en) * | 1982-05-24 | 1984-12-18 | Adjustable Bushing Corp. | Nose member for an expandible bushing type locking assembly |
| EP0125683A3 (en) * | 1983-05-19 | 1985-07-10 | Adjustable Bushing Corporation | An improved radially expandable bushing assembly |
| IT244455Y1 (en) * | 1998-12-23 | 2002-03-11 | Ferrari Franco | MOUNTING DEVICES WITH EXPANSION DOWEL IN PARTICULAR FOR HINGES FOR FURNITURE |
| CN203655819U (en) * | 2013-12-02 | 2014-06-18 | 江西昌河航空工业有限公司 | Quick-detachment locating pressing pin |
| WO2016019919A1 (en) * | 2014-08-08 | 2016-02-11 | 杨东佐 | Expansion fastening connection structure and connection method, and expansion fastening connection assembly |
| CN205025890U (en) * | 2015-08-12 | 2016-02-10 | 深圳亚太航空技术有限公司 | Expansion bolt assembly |
| CN205190471U (en) * | 2015-08-12 | 2016-04-27 | 深圳亚太航空技术有限公司 | Tight bolt assembly rises |
| CN205578436U (en) * | 2016-03-31 | 2016-09-14 | 上海上飞飞机装备制造有限公司 | Flexible bloated tight mechanism in quick location |
| CN107939799A (en) * | 2017-05-22 | 2018-04-20 | 深圳亚太航空技术有限公司 | Quick-detachable attachment device |
-
2020
- 2020-05-26 CN CN202010455494.8A patent/CN111577730B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211259310U (en) * | 2019-12-05 | 2020-08-14 | 中国直升机设计研究所 | Quick-release diameter-adjustable bolt capable of bearing pull shear |
| CN213017161U (en) * | 2020-05-26 | 2021-04-20 | 深圳亚太航空技术有限公司 | Quick-release expansion device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111577730A (en) | 2020-08-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111577730B (en) | Quick release expansion device | |
| CN111594521B (en) | Quick-release expansion connecting device | |
| CA1278990C (en) | Expander device | |
| EP3275587B1 (en) | Retractable index pins and methods of operating thereof | |
| US8746984B2 (en) | Mechanism for mounting and dismounting bearing | |
| US20140353929A1 (en) | Expanding arbor | |
| US8794892B1 (en) | Torque nut assembly | |
| CN213017161U (en) | Quick-release expansion device | |
| US20160040704A1 (en) | Fastening device | |
| US10087976B2 (en) | Machine element | |
| EP2134973B1 (en) | Connection arrangement and a locking bolt included therein | |
| JP2015523521A (en) | Permanent visual indicator and diametric-axial relation gauge and method of using the same | |
| US20160271774A1 (en) | Pull-Off Device for Conical Pin Bushing and Locking Device for Screw | |
| US20200378431A1 (en) | Split nut | |
| WO2021216146A1 (en) | Reusable release mechanism | |
| EP3473873B1 (en) | Threaded couplings with locking | |
| US9999931B2 (en) | Locking mechanism for a collet assembly | |
| US20100040429A1 (en) | Locking fastener | |
| EP3337988B1 (en) | Device for mounting and dismantling a bearing collar on a pin bolt | |
| CN115030946A (en) | Bolt type quick-release expansion device | |
| US5498008A (en) | Chuck jaw locking apparatus for rotatable machine tool | |
| US10857657B2 (en) | Tool for removal of spring clip from a nut plate assembly and associated method | |
| US12123444B2 (en) | Removable blind fastener | |
| CN221388969U (en) | Tension mandrel clamp | |
| EP3341619B1 (en) | Locking arrangement for a nut |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 518000 Building 101, Building B, Building C, Building D, Building E, Building F, No. 22, Fengqi Road, Fuchengao Community, Pinghu Street, Longgang District, Shenzhen City, Guangdong Province Applicant after: Shenzhen Asia Pacific Aviation Technology Co.,Ltd. Address before: No.68, Jiahu Road, fuchengao community, Pinghu street, Longgang District, Shenzhen City, Guangdong Province Applicant before: SHENZHEN ASIA-PACIFIC AVIATION TECHNOLOGY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |