CN109595248B - Locking device and locking method for stop washer - Google Patents
Locking device and locking method for stop washer Download PDFInfo
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- CN109595248B CN109595248B CN201811494031.1A CN201811494031A CN109595248B CN 109595248 B CN109595248 B CN 109595248B CN 201811494031 A CN201811494031 A CN 201811494031A CN 109595248 B CN109595248 B CN 109595248B
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000000149 penetrating effect Effects 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 238000004080 punching Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000003068 static effect Effects 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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Classifications
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- 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
- F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
Abstract
The invention discloses a locking device of a stop washer, which comprises: the positioning part is used for penetrating through the object part and positioning the object part, a guide part matched and centered with the object part is sleeved on the positioning part, a stamping part used for extruding a stop washer to enable the stop washer to deform towards the center direction of the fastener so as to lock the fastener is sleeved on one end, close to the object part, of the guide part, and a pushing part used for pushing the stamping part is arranged at one end, far away from the object part, of the guide part. The pushing piece pushes the stamping piece to press the stop washer assembled on the fastening piece, so that the stop washer deforms towards the fastening piece to lock the fastening piece assembled on the target part. The locking device can ensure that the locking of the stop washer is formed at one time without multiple operations, improves the stress condition of the deformation part of the stop washer, and reduces the phenomena of fracture or crack. The invention also provides a method for locking the stop washer by adopting the locking device.
Description
Technical Field
The invention relates to the field of aircraft engine assembly, in particular to a stop washer safety device. In addition, the invention also relates to a locking method for assembling the stop washer by using the stop washer locking device.
Background
The power shaft of some type of aeroengine transmits power and torque through the coupling, the end of the power shaft fixes the coupling through the nut, and the nut adopts the locking washer to prevent loosing and stop. Referring to fig. 1, in the prior art, a lock washer 2 and a nut 3 are installed at corresponding positions of a power shaft 1, after the nut 3 is tightened to the lock washer 2 as required, the lock washer 2 is riveted by punching a copper bar/aluminum bar, a hammer and the like at a position corresponding to a lock groove of the nut 3 on the lock washer 2, so that a deformed position of the lock washer is clamped in the lock groove of the nut 3. The fastener-nut 3 is made unable to rotate to achieve the function of loosening prevention of the nut 3.
The existing safety mode is realized only by manual riveting, multiple operations are carried out, time and labor are wasted, and the riveting quality is greatly different. On the other hand, in the punching and riveting process, the stop washer is subjected to the action of impact force, the stress concentration is large, cracks are easy to appear, the hidden danger of cracks and breakage in the subsequent use process of the engine exists, and the safety failure, even the part loosening, the engine failure and the like are caused.
Disclosure of Invention
The invention provides a locking device and a locking method for a stop washer, which aim to solve the technical problem that the existing stop washer is easy to crack or break in the manual riveting process.
The technical scheme adopted by the invention is as follows:
a stop washer locking apparatus for locking a stop washer and a fastener to each other, the fastener being assembled to a subject part, the stop washer being provided between the subject part and the fastener, comprising: the positioning part is used for penetrating through the object part and positioning the object part, a guide part connected with one end of the object part, which is used for installing the fastener, is sleeved on the positioning part, a stamping part used for extruding the outer edge of the stop washer to enable the outer edge of the stop washer to deform towards the center direction of the fastener so as to lock the fastener is arranged at one end, which is close to the object part, of the guide part, and a pushing part used for pushing the stamping part to move to enable the stamping part to extrude the stop washer is arranged at one end.
Furthermore, locking device still includes the pressure head that is used for guide and object part centering on the setting element is located to the cover, and the one end of pressure head is used for centering with the cooperation of object part, and the other end of pressure head is used for centering with the guide is close to the cooperation of the one end of object part.
Further, the guide member includes: the positioning piece is sleeved with a front guide piece section which is used for providing a moving stroke for the pushing piece, a middle guide piece section which is connected with the front guide piece section and is used for providing a moving stroke for the stamping piece, and a tail guide piece section which is connected with the middle guide piece section and is used for being matched with one end of the object part mounting fastener; the external diameter of the guide tail section is larger than that of the guide middle section, and a step is formed at the joint of the excircle of the guide tail section and the excircle of the guide middle section and used for limiting stamping parts.
Furthermore, a plurality of convex blocks protruding in the axial direction are arranged on the end face of one end of the tail section of the guide piece, which is far away from the middle section of the guide piece, along the circumferential direction, and the convex blocks are matched with the fastening piece to position the guide piece; one end of the guide tail section, which is far away from the guide middle section, is provided with a first inner hole, the aperture of the first inner hole is larger than that of the guide middle section, and the inner circumferential surface of the first inner hole is matched with the outer circle of the pressure head for centering.
Further, the stamping includes: the first body is sleeved on the guide piece, an inner hole of the first body is in a step shape, a small-aperture section of the first body is matched with a unthreaded hole in the middle section of the guide piece, and a large-aperture section of the first body is in clearance fit with the pushing piece.
Furthermore, a plurality of punches extending towards the axial direction are arranged at intervals along the circumferential direction on the end face of one end, away from the large-aperture section of the first body, of the small-aperture section of the first body, and guide grooves matched with the punches are arranged at intervals on the outer circumference of the tail section of the guide piece; the top end of the punch is tapered for pressing the outer edge of the stop washer and deforming it toward the retaining recess of the fastener as the punch moves.
Further, the pusher comprises: the second body is sleeved on the guide piece, the inner peripheral surface of the second body is provided with internal threads, and the internal threads are matched with the external threads arranged on the outer peripheral surface of the front section of the guide piece so as to connect the guide piece with the pushing piece; the end face of one end, close to the object part, of the second body is provided with a push rod used for pushing the stamping part to move, and the top end of the push rod is connected with the large-aperture section of the first body through a cylindrical pin.
Furthermore, the inner wall surface of the push rod is in a step shape, the inner peripheral surface of the small-aperture section of the push rod is provided with internal threads, the internal threads are matched with external threads arranged on the outer peripheral surface of the front section of the guide piece, and the large-aperture section of the push rod is in clearance fit with the middle section of the guide piece; the top end of the push rod is provided with a thrust needle roller and a retainer assembly which are used for transmitting thrust to the stamping part, and the second body is also provided with a straight handle which is used for applying external force to enable the pushing part to move on the front section of the guide part.
Furthermore, a pressing plate which is matched and centered with the object part is arranged at one end, far away from the pushing piece, of the positioning piece, and a pressing nut which is used for axially pressing the object part, the guide piece and the pressing head which are sleeved on the positioning piece is arranged at one end, close to the pushing piece, of the positioning piece.
According to another aspect of the present invention, there is also provided a method of locking a lock washer using the above-described locking apparatus, the method comprising the steps of:
the positioning piece penetrates through the object part and positions one end of the object part, which is not provided with the fastener;
one end of the pressure head is matched and centered with one end of the object part mounting fastener, the other end of the pressure head is matched and centered with the guide piece, and the locking device is axially pressed through the positioning piece;
rotating the pushing piece to move on the positioning piece and push the stamping piece to move towards the object part so as to extrude the outer edge of the stop washer to deform the stop washer towards the center of the fastener;
and (4) finishing the stroke of the stamping part, stopping the stamping part from extruding the stop washer, and locking the fixing piece by the deformation part of the stop washer.
The invention has the following beneficial effects:
the lock washer locking device of the present invention is used for locking a lock washer and a fastener to each other, the fastener being fitted to an end of a subject part. The locking device includes: the positioning part is used for penetrating through the object part and positioning the object part, a guide part matched and centered with the object part is sleeved on the positioning part, a stamping part used for extruding the stop washer to enable the stop washer to deform towards the center direction of the fastener so as to lock the fastener is sleeved on one end, close to the object part, of the guide part, and a pushing part used for pushing the stamping part to enable the stamping part to extrude the stop washer is arranged on one end, far away from the object part, of the guide part. The pushing piece pushes the stamping piece to press the stop washer assembled on the fastening piece, so that the stop washer deforms towards the fastening piece to lock the fastening piece assembled on the target part. The locking device can ensure that the locking of the stop washer is formed at one time without multiple operations, improves the stress condition of the deformation part of the stop washer, and reduces the phenomena of fracture or crack.
According to another aspect of the invention, the invention also provides a method for locking the stop washer by adopting the locking device, and the locking method can form the locking of the stop washer at one time, thereby improving the assembly quality and the assembly efficiency; in the locking process, the traditional punching riveting mode is changed into a static pressure riveting mode, the stress concentration condition of the deformation area of the stop washer is improved, and the hidden danger and probability of safety failure, part loosening or engine failure caused by unexpected cracks and fractures in the subsequent use process are reduced.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the mating structure of the object parts of the preferred embodiment of the present invention with a stop washer;
FIG. 2 is a schematic structural view of a locking device according to a preferred embodiment of the present invention;
FIG. 3 is a schematic view of the locking device of the preferred embodiment of the present invention in cooperation with the subject part;
FIG. 4 is a schematic structural view of a guide member according to a preferred embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view taken along line B-B of FIG. 4;
FIG. 6 is a schematic structural view of a stamping of a preferred embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view taken along line A-A of FIG. 6;
FIG. 8 is a schematic view of the structure of the pusher member of the preferred embodiment of the present invention.
The reference numbers illustrate:
1. an object part; 2. a stop washer; 3. a fastener; 4. a coupling;
10. a positioning member; 20. a guide member; 21. a guide front section; 22. a guide middle section; 23. a guide tail section; 231. a bump; 232. a guide groove; 30. stamping parts; 31. a first body; 32. a punch; 40. a pusher member; 41. a second body; 42. a push rod; 43. a straight handle; 50. a pressure head; 60. a thrust needle roller and cage assembly; 61. a thrust washer; 62. a cylindrical pin; 70. pressing a plate; 71. heat shrink tubing; 80. knurling the nut; 81. a gasket.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 2 and 3, a preferred embodiment of the present invention provides a lock washer 2 locking apparatus for locking a lock washer 2 and a fastener 3 to each other, the fastener 3 being assembled to an end of a subject part 1, the lock washer 2 being provided between the subject part 1 and the fastener 3, the lock apparatus comprising: the positioning part 10 is used for penetrating through the object part 1 and positioning the object part 1, a guide part 20 matched with the object part 1 for centering is sleeved on the positioning part 10, a stamping part 30 used for pressing the outer edge of the stop washer 2 to deform towards the center of the fastening part 3 so as to lock the fastening part 3 is sleeved on one end, close to the object part 1, of the guide part 20, and a pushing part 40 used for pushing the stamping part 30 to press the stop washer 2 is arranged on one end, far away from the object part 1, of the guide part 20. In this embodiment, the lock washer 2 is a bowl-shaped lock washer, and the pushing member 40 pushes the stamping member 30 to press the bowl-locking portion of the bowl-shaped lock washer, so that the bowl-locking deformation portion is clamped in the locking groove of the fastener 3, thereby locking the fastener 3. It will be appreciated that in other embodiments, the stop washer 2 may be a washer of other shapes for locking the fastener 3.
The locking device of the embodiment can enable the assembly of the stop washer to be formed at one time, does not need multiple operations, and improves the assembly quality and the assembly efficiency. In addition, the traditional punching riveting mode is changed into a static pressure pressing riveting mode, the stress concentration condition of the deformation area of the stop washer is improved, and the hidden danger and probability of safety failure, part loosening and engine failure caused by unexpected cracks and fractures in the subsequent use process are reduced.
In the present embodiment, the target part 1 is a power shaft, and the fastening member 3 is a nut. The end part of the power shaft is provided with a coupling 4, the coupling 4 is fixed by a nut, and the stop washer 2 is a bowl-shaped stop washer and is used for locking the nut and preventing the nut from loosening in the working process.
Referring to fig. 2, the locking device further includes a pressing head 50 sleeved on the positioning member 10 for centering the guide member 20 and the target part 1, one end of the pressing head 50 is used for centering in cooperation with the target part 1, and the other end of the pressing head 50 is used for centering in cooperation with one end of the guide member 20 close to the target part 1.
In the present embodiment, the positioning member 10 is a screw penetrating the target component 1. The pressure head 50 is sleeved on the screw and matched with the screw unthreaded hole, and can freely move on the screw in a free state. The excircle of the pressure head 50 is in a step shape, the excircle of the small end of the pressure head 50 is matched and centered with the inner hole of the guide part 20, the excircle of the large end of the pressure head 50 is matched and centered with the inner hole of the object part 1, and therefore bidirectional centering of the object part 1 and the guide part 20 is achieved.
Referring to fig. 4 and 5, the guide 20 includes: the pushing part comprises a front guide part section 21, a middle guide part section 22 and a tail guide part section 23, wherein the front guide part section 21 is sleeved on the positioning part 10 and used for providing a moving stroke for the pushing part 40, the middle guide part section 22 is connected with the front guide part section 21 and used for providing a moving stroke for the stamping part 30, and the tail guide part section 23 is connected with the middle guide part section 22 and used for being matched with one end of the target part 1, which is used.
Preferably, the outer diameter of the guide tail section 23 is larger than that of the guide middle section 22, and a step is formed at the connection part of the outer circle of the guide tail section 23 and the outer circle of the guide middle section 22 for limiting the stamping part 30. The end face of the end of the guide tail section 23 far from the guide middle section 22 is provided with a plurality of projections 231 protruding along the axial direction along the circumferential direction, and the projections 231 are matched with the fastener 3 for positioning the guide 20. The end of the guide piece end section 23 remote from the guide piece middle section 22 is provided with a first inner hole. The first bore is larger in diameter than the bore in the guide middle section 22. The first bore is centered in cooperation with the outer circumference of one end of the ram 50.
In the present embodiment, the guiding element 20 is a guiding shaft sleeved on the positioning element 10. The outer circle of the small end of the pressure head 50 is matched and centered with the inner circumferential surface of the first inner hole, and the guide part 20 is fixed. The fastener 3 is a nut, locking grooves and non-locking grooves are formed in the nut in the circumferential direction at intervals, and the locking grooves are used for providing space for the stop washer 2 to deform towards the center direction of the nut. The non-locking recess cooperates with the projection 231 to locate the guide 20.
In the initial state, the guide 20 achieves bidirectional centering of the guide 20 and the target part 1 by the ram 50. The end face of the end of the guide tail section 23 far away from the guide middle section 22 is in contact with the end face of the target part 1, and the projection 231 extends into the non-locking groove of the fastener 3, so that the guide 20 is positioned. In the present embodiment, 4 projections 231 are provided according to the non-locking groove of the nut, and the projections 231 are uniformly spaced. The number of the locking grooves is 4. It is understood that in other embodiments, the location and number of the projections 231 is provided according to the requirements of the fastener 3.
In addition, a step is arranged at the connection part of the excircle of the guide piece middle section 22 and the guide piece tail section 23, and is used for limiting the stroke of the stamping piece 30, so that on one hand, the deformation quantity of the stop washer 2 is limited, and the deformation specifications of the stop washer 2 are unified; on the other hand, the target component 1 is prevented from being damaged by an excessive stroke of the pressing member 30.
Referring to fig. 6 and 7, the stamping 30 includes: the first body 31 is sleeved on the guide member 20, an inner hole of the first body 31 is stepped, a small-bore section of the first body 31 is in clearance fit with a unthreaded hole of the guide member middle section 22, and a large-bore section of the first body 31 is in clearance fit with the pushing member 40.
Preferably, the end surface of the small-bore section of the first body 31, which is far away from the end of the large-bore section of the first body 31, is provided with a plurality of punches 32 extending in the axial direction at intervals along the circumferential direction, the outer circumference of the guide tail section 23 is provided with guide grooves 232 matched with the punches 32 at intervals, and the punches 32 press the stopper washer 2 through the guide grooves 232 when moving.
In the present embodiment, as shown in fig. 1, the stopper washer 2 is fitted to the subject part 1, and the stopper washer 2 includes a bottom portion which is fitted to the subject part 1 and whose circumferential direction extends upward to form an outer edge. The outer edge of the stop washer 2 is located outside the fastener 3. Preferably, the top end of the punch 32 is tapered, and during the pressing process, firstly, the punch 32 contacts with the outer edge of the stop washer 2, and as the stroke advances, the tapered surface of the punch 32 continuously presses the outer edge of the stop washer 2, so that the outer edge of the stop washer 2 deforms into the locking groove of the fastener 3, and further the deformed part of the stop washer 2 locks the fastener 3.
In this embodiment, the first body 31 is disposed on the middle section 22 of the guide member and is engaged with the unthreaded hole of the guide member 20, so that the pushing member 40 can push the stamping member 30 to move on the guide member 20. In the initial state, the punch 32 is located in the guide groove 232 and does not protrude from the end surface of the end of the guide piece end section 23 remote from the guide piece middle section 22. In the working state, the punch 32 is pushed by the pushing member 40 and moves along the guide groove 232, so as to pass through the guide groove 232 and move towards the object part 1, and is firstly contacted with the outer edge of the stop washer 2, and as the stroke advances, the punch 32 further presses the outer edge of the stop washer 2 to deform the stop washer 2 into the locking groove of the fastener 3. In the present embodiment, the number of the punches 32 is 4 corresponding to the number of the locking recesses of the fastener 3. It will be appreciated that in other embodiments, the location and number of corresponding punches 32 is provided according to the number of retaining recesses of the fastener 3.
In the present embodiment, when the end surface of the first body 31 near the target part 1 comes into contact with the stepped surface, the punch 32 ends the stroke. The step surface is formed at the connection part of the excircle of the middle section 22 and the excircle of the tail section 23 of the guide piece.
Referring to fig. 8, pusher 40 includes: the second body 41 is sleeved on the guide member 20, and an inner circumferential surface of the second body 41 is provided with an inner thread, and the inner thread is matched with an outer thread arranged on an outer circumferential surface of the guide member front section 21, so that the guide member 20 is connected with the pushing member 40.
The end face of the second body 41 near one end of the guide middle section 22 is provided with a push rod 42 for pushing the stamping part 30 to move, and the push rod 42 is connected with the large-aperture section of the first body 31 through a cylindrical pin 62.
In the present embodiment, the pushing member 40 and the pressing member 30 are integrally connected by the cylindrical pin 62. The top end of the push rod 42 is provided with a thrust roller and cage assembly 60 for transmitting thrust to the ram 30, thereby pushing the ram 30 to move on the guide mid-section 22. A thrust washer 61 is also provided on the thrust needle and cage assembly 60.
Specifically, the inner wall surface of the push rod 42 is stepped, the inner peripheral surface of the small-bore section of the push rod 42 is provided with an internal thread, the internal thread is matched with an external thread arranged on the outer peripheral surface of the guide front section 21, and the large-bore section of the push rod 42 is in clearance fit with the guide middle section 22. In this embodiment, the large hole of the push rod 42 is in clearance fit with the middle guide section 22, so that the middle guide section 22 does not obstruct the push rod 42 during the movement of the push rod 42, and the operation is more convenient.
Preferably, the second body 41 is further provided with a straight handle 43 for applying an external force to move the pushing member 40 on the front guide section 21 in a screw-threaded manner. The pushing member 40 can be moved on the front guide section 21 by providing a straight handle 43 on the second body 41 to facilitate the application of an external force.
Referring to fig. 1 and 2, a pressing plate 70 for centering the target component 1 is disposed at an end of the positioning member 10 away from the pushing member 40, and a pressing nut for axially pressing the guide member 20 sleeved on the positioning member 10 is disposed at an end close to the pushing member 40.
In the present embodiment, a pressing plate 70 for centering the end of the target part 1, to which the fastener 3 is not attached, is provided on the positioning member 10 at the end remote from the pushing member 40. The outer portion of the pressing plate 70 is stepped, the outer circle of the small end of the pressing plate 70 is matched and centered with the inner hole peripheral surface of the object part 1, and the outer end surface of the large end of the pressing plate 70 is fastened by a nut. The end of the positioning member 10 near the small end of the pressing plate 70 is provided with a heat shrink tube 71 for protecting the object part 1 during positioning.
A washer 81 and a knurled nut 80 are arranged at one end of the positioning member 10 close to the pushing member 40, and the object part 1, the pressing plate 70, the guide member 20 and the pressing head 50 which are sleeved on the positioning member 10 are axially screwed, so that the axial positioning of the locking device is realized.
In this embodiment, the fastener 3 is mounted to the end of the object part 1, the stop washer 2 is disposed between the fastener 3 and the object part 1, the outer edge of the stop washer 2 is located outside the fastener 3, and the locking device is used to lock the stop washer 2 and the fastener 3 to each other. The operation steps of the locking device of the embodiment are as follows: penetrating the positioning piece 10 through the object part 1, and matching and centering one end of the object part 1, which is not provided with the fastening piece 3, by using a pressing plate 70 and locking the end by using a nut; the centering of the object part 1 and the guide piece is realized by the pressing head 50 at one end of the object part 1 where the fastener 3 is arranged; one end of the positioning piece 10 close to the pushing piece 40 is screwed by a knurled nut 80 to realize the axial positioning of the locking device. At this time, the locking device is fitted to the objective part 1 and positioning is completed, the projection 231 is located in the non-locking recess of the fastener 3, and the punch 32 is located in the guide groove 232 and does not protrude from the end face of the guide 20 near the end of the objective part 1. The straight handle 43 is shaken to move the pushing piece 40 on the positioning piece 10, the punch 32 is further pushed to move towards the object part 1 through the guide groove 232 and contact with the outer edge of the stop washer 2, the punch 32 continues to move to press the outer edge of the stop washer 2 and deform the outer edge into the locking groove of the fastener 3, when the end surface of the first body 31 close to the object part 1 contacts with the step surface, the stroke of the punch 32 is finished, the deformation of the stop washer 2 is finished, and the fastener 3 is locked by the stop washer 2.
In this embodiment, the distance from the step surface to the end surface of the front guide section 21 away from the middle guide section 22 is a first distance, and the distance from the step surface to the end surface of the second body 41 away from the push rod 42 is a second distance. The difference between the first distance and the second distance is the maximum stroke of the punch 32. By controlling the stroke of the punch, on one hand, the deformation amount of the stop washer is limited, so that the stop washer is standard and uniform, and on the other hand, the object part is prevented from being damaged in the locking process.
The locking device of the invention moves the pushing piece on the guide piece by shaking the straight handle to further push the punch to move so as to press the outer edge of the stop washer assembled on the fastening piece and deform the stop washer into the locking groove of the fastening piece, thereby locking the fastening piece assembled on the object part. The locking device can ensure that the assembly of the stop washer is formed at one time without repeated operation, thereby improving the assembly quality and the assembly efficiency. In addition, the traditional punching riveting mode is changed into a static pressure riveting mode, the stress concentration condition of the deformation area of the stop washer is improved, and the hidden danger and probability of safety failure, part loosening or engine failure caused by unexpected cracks and fractures in the subsequent use process are reduced.
According to another aspect of the invention, the invention also provides a method for locking a lock washer 2 with the locking device described above, comprising the steps of:
the positioning member 10 penetrates the object part 1 and positions one end of the object part 1, which is not provided with the fastener 3;
one end of the pressure head 50 is matched and centered with one end of the object part 1, provided with the fastener 3, and the other end of the pressure head 50 is matched and centered with the guide piece 20, and the locking device and the object part 1 are axially pressed through the positioning piece 10;
rotating the pushing piece 40 to move on the positioning piece 10 and pushing the stamping piece 30 to move towards the object part 1 so as to press the outer edge of the stop washer 2 to deform the stop washer towards the center of the fastener 3;
at the end of the stroke of the punch 30, the punch 30 stops pressing the lock washer 2, and the deformed portion of the lock washer 2 locks the fastener 3.
In this embodiment, the locking method of the stopper washer includes the steps of:
firstly, a screw penetrates through a power shaft, and one end of the power shaft, which is not provided with a nut, is fixed by a pressing plate 70;
then, sleeving the pressure head 50 and the guide shaft 20 on the screw rod, and then centering the guide shaft and the object part 1 by using the pressure head 50;
tightening a nut at one end of the screw rod close to the pushing piece 40 to realize the axial positioning of the locking device and the object part 1; at this time, the positioning of the locking device and the objective part 1 is realized. In the initial state, the end surface of the guide shaft near the end of the target part 1 is in contact with the end surface of the target part 1 at the end where the fastener 3 is installed, the projection 231 is placed in the non-safety groove of the nut, the punch 32 is placed in the guide groove 232, and the punch 32 does not protrude from the end surface of the guide shaft near the end of the target part 1.
Rotating the straight handle 43 to move the pushing member 40 on the guide shaft to push the punch 32 to move toward the object part 1 through the guide groove 232 to press the outer edge of the stop washer 2 and deform it into the locking groove of the nut;
when the first body 31 moves to the step surface, the stroke of the punch 32 is finished, the punch 32 stops pressing the stop washer 2, and the deformed portion of the stop washer 2 locks the nut.
The locking method of the invention can form the locking of the stop washer at one time, thus improving the assembly quality and the assembly efficiency; in the assembling process, the traditional punching riveting mode is changed into a static pressure pressing riveting mode, the stress concentration condition of the deformation area of the stop washer is improved, and the hidden danger and probability of safety failure, part loosening or engine failure caused by unexpected cracks and fractures in the subsequent use process are reduced; in addition, the deformation amount of the stop washer is limited by limiting the stroke of the punch, the assembly specification of the stop washer is unified, and the target part is not damaged.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A lock washer locking device for locking a lock washer (2) and a fastener (3) to each other, the fastener (3) being fitted to an object part (1), the lock washer (2) being provided between the object part (1) and the fastener (3), characterized in that,
the method comprises the following steps: the positioning part (10) is used for penetrating through the object part (1) and positioning the object part (1), a guide part (20) connected with one end, provided with the fastening piece (3), of the object part (1) is sleeved on the positioning part (10), a stamping part (30) used for extruding the outer edge of the stop washer (2) to enable the outer edge to deform towards the center direction of the fastening piece (3) so as to lock the fastening piece (3) is arranged at one end, close to the object part (1), of the guide part (20), and a pushing part (40) used for pushing the stamping part (30) to move so as to enable the stamping part to extrude the stop washer (2) is arranged at one end, far away from the object part (1), of the guide part (20);
the locking device further comprises a pressure head (50) sleeved on the positioning piece (10) and used for centering the guide piece (20) and the object part (1), one end of the pressure head (50) is used for centering in a matched mode with the object part (1), and the other end of the pressure head (50) is used for centering in a matched mode with one end, close to the object part (1), of the guide piece (20);
the guide (20) comprises: a guide front section (21) sleeved on the positioning part (10) and used for providing a moving stroke for the pushing part (40), a guide middle section (22) connected with the guide front section (21) and used for providing a moving stroke for the stamping part (30), and a guide tail section (23) connected with the guide middle section (22) and used for being matched with one end of the target part (1) for installing the fastener (3);
the outer diameter of the tail section (23) of the guide piece is larger than that of the middle section (22) of the guide piece, and a step surface is formed at the joint of the excircle of the tail section (23) of the guide piece and the excircle of the middle section (22) of the guide piece and used for limiting the stamping part (30);
the stamping (30) comprises: the first body (31) is sleeved on the guide piece (20), an inner hole of the first body (31) is in a step shape, a small-aperture section of the first body (31) is matched with a unthreaded hole of the middle section (22) of the guide piece, and a large-aperture section of the first body (31) is in clearance fit with the pushing piece (40);
the pusher (40) includes: the second body (41) is sleeved on the guide piece (20), an internal thread is arranged on the inner circumferential surface of the second body (41), and the internal thread is matched with an external thread arranged on the outer circumferential surface of the front section (21) of the guide piece, so that the guide piece (20) is connected with the pushing piece (40);
a push rod (42) for pushing the stamping part (30) to move is arranged on the end face of one end, close to the object part (1), of the second body (41), the top end of the push rod (42) is connected with the large-aperture section of the first body (31) through a cylindrical pin (62), a pressing plate (70) matched and centered with the object part (1) is arranged at one end, far away from the pushing part (40), of the positioning part (10), and a pressing nut (80) for axially pressing the object part (1), the guide part (20) and the pressing head (50) which are sleeved on the positioning part (10) is arranged at one end, close to the pushing part (40);
the distance that the terminal surface of guide middle section (22) one end was kept away from to guide anterior segment (21) to the step face is first distance, and the distance that the terminal surface of push rod (42) one end was kept away from to second body (41) to the step face is the second distance, the difference of first distance and second distance is as the biggest stroke of stamping workpiece (30), the biggest stroke is used for injecing the deformation volume of lock washer, makes its unified standard to and avoid damaging the object part in locking process.
2. A stop washer locking device according to claim 1,
the end face of one end, away from the guide middle section (22), of the guide tail section (23) is provided with a plurality of protruding blocks (231) protruding along the axial direction along the circumferential direction, and the protruding blocks (231) are matched with the fastening piece (3) to position the guide (20);
one end of the guide piece tail section (23) far away from the guide piece middle section (22) is provided with a first inner hole, the aperture of the first inner hole is larger than that of the guide piece middle section (22), and the inner peripheral surface of the first inner hole is matched and centered with the outer circle of the pressure head (50).
3. A stop washer locking device according to claim 2,
the end face of one end, away from the large-aperture section of the first body (31), of the small-aperture section of the first body (31) is provided with a plurality of punches (32) extending in the axial direction at intervals along the circumferential direction, and the outer circumference of the tail section (23) of the guide piece is provided with guide grooves (232) matched with the punches (32) at intervals;
the top end of the punch (32) is conical and is used for pressing the outer edge of the stop washer (2) and enabling the stop washer to deform towards the locking groove of the fastener (3) when the punch (32) moves.
4. A stop washer locking device according to claim 1,
the inner wall surface of the push rod (42) is in a step shape, the inner peripheral surface of the small-aperture section of the push rod (42) is provided with internal threads, the internal threads are matched with external threads arranged on the outer peripheral surface of the front section (21) of the guide piece, and the large-aperture section of the push rod (42) is in clearance fit with the middle section (22) of the guide piece;
the top end of the push rod (42) is provided with a thrust needle roller and retainer assembly (60) for transmitting thrust to the stamping part (30), and the second body (41) is also provided with a straight handle (43) for applying external force to enable the pushing part (40) to move on the front section (21) of the guide part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811494031.1A CN109595248B (en) | 2018-12-07 | 2018-12-07 | Locking device and locking method for stop washer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811494031.1A CN109595248B (en) | 2018-12-07 | 2018-12-07 | Locking device and locking method for stop washer |
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| Publication Number | Publication Date |
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| CN109595248A CN109595248A (en) | 2019-04-09 |
| CN109595248B true CN109595248B (en) | 2021-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2897569Y (en) * | 2006-03-31 | 2007-05-09 | 上海柴油机股份有限公司 | Installation tool of engine with conical-surface rear oil seal |
| WO2010141144A2 (en) * | 2009-06-05 | 2010-12-09 | Carrier Corporation | Mounting device with splined washer |
| CN203442409U (en) * | 2013-08-28 | 2014-02-19 | 济钢集团有限公司 | Quick-change connector for steel tube pressure withstanding test |
| JP5817039B2 (en) * | 2014-05-19 | 2015-11-18 | 株式会社ヤマザキアクティブ | Loosening fastening member or loosening washer |
| CN205173258U (en) * | 2015-11-23 | 2016-04-20 | 中国航空动力机械研究所 | Locking locking structure |
| CN206448845U (en) * | 2016-12-21 | 2017-08-29 | 中国南方航空工业(集团)有限公司 | Stop-motion lock piece locking device |
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