CN114810771A - Novel self-rebounding non-falling screw and use method - Google Patents
Novel self-rebounding non-falling screw and use method Download PDFInfo
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- CN114810771A CN114810771A CN202210578360.4A CN202210578360A CN114810771A CN 114810771 A CN114810771 A CN 114810771A CN 202210578360 A CN202210578360 A CN 202210578360A CN 114810771 A CN114810771 A CN 114810771A
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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
- 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
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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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/041—Specially-shaped shafts
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Abstract
The invention discloses a novel self-rebounding non-falling screw and a use method thereof, and the screw comprises a screw, a spring, a bushing and a stop washer, wherein the stop washer is of a circular ring structure with an inner ring and an outer ring, two guide convex blocks which are distributed in a symmetrical state are arranged on the inner ring, a stop groove corresponding to the guide convex blocks is arranged on the screw, the spring and the bushing are coaxially sleeved on the screw, one end of the spring is propped against the screw, and the other end of the spring is clamped in the bushing; the stop washer is sleeved on the screw through the inner ring and is in sliding connection with the stop groove through the guide convex block, so that the stop washer can slide left and right on the screw. The self-rebounding non-falling screw and the use method thereof enable the cover plate to be more convenient and quicker to mount or dismount, have the advantages of simple structure, convenience in mounting and use, strong practicability and wide application range, and are particularly suitable for being used on thin cover plates.
Description
Technical Field
The invention relates to the technical field of fasteners, in particular to a novel self-rebounding non-falling screw and a use method thereof.
Background
The screw is a common fastener, becomes an indispensable industrial necessity in daily life, is widely used on machinery, electrical appliances and buildings, has a very wide application range, and relates to aspects of our lives. In particular industries, there are certain requirements for screws. For example, in the process of assembling and disassembling, the screws are required to be kept on the cover plate and not fall off, so that when the cover plate is assembled again, the screws are directly used for screwing; meanwhile, after the screw is loosened, the screw and the mounting threaded hole can be ensured to be coaxial without deflection and deviation, so that the cover plate can be assembled smoothly when being mounted again, scratch is avoided, and the screw is not dropped. The non-falling screw is one of the common fasteners in mechanical equipment, the advantage of using the non-falling screw is that the screw does not leave the product after the screw is unscrewed, the frequent loss of the screw is avoided, and the non-falling screw becomes an indispensable fastener in many mechanical equipment based on the advantage of the non-falling screw.
The screw that does not drop that uses at present to the base member that needs adopt the apron to connect, in specific application process, mainly has following problem: firstly, because the non-falling screw needs to be matched with the gasket for use, the gasket needs to be sleeved on the polished rod section in the manufacturing process of the non-falling screw, and then the thread of the external thread section is processed; secondly, the fixed thin cover plate is easy to cause the gasket to generate the scraping phenomenon when the non-falling screw is loosened due to vibration or shaking; thirdly, in the process of removing and disassembling the cover plate, the situation that the screw is inconvenient to separate from the threaded hole due to contact easily occurs, and meanwhile, when the cover plate is assembled again, the screw needs to be centered in an auxiliary mode, so that the problem of great inconvenience in operation is brought to assembly; fourthly, in the process of connecting the fixed thin cover plates, holes need to be formed in the thin cover plates in advance so as to facilitate connection, and the overall strength of the cover plates is easily reduced due to excessive holes.
Disclosure of Invention
The invention aims to solve the technical problems in the background art and provides a non-falling screw which is simple in structure and convenient to operate, under the combined action of a spring and a bush, the screw can still be kept on a cover plate after being disassembled so as to be directly used during reassembling, and when the screw is in a loose state, the screw can automatically rebound to enable the screw and a threaded hole to be in a completely-falling state, and the screw and the cover plate can still be kept in a vertical state so as to be convenient to reassemble, so that the assembling efficiency is improved, in particular to a novel self-rebounding non-falling screw and a using method.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the locking device comprises a screw, a spring, a bushing and a stop washer, wherein the stop washer is arranged into a circular ring structure with an inner ring and an outer ring, two guide convex blocks which are symmetrically distributed are arranged on the inner ring, two stop grooves corresponding to the guide convex blocks are arranged on the screw, the spring and the bushing are coaxially sleeved on the screw, one end of the spring is abutted against the screw, and the other end of the spring is clamped in the bushing; the stop washer is sleeved on the screw through the inner ring and is in sliding connection with the stop groove through the guide convex block, so that the stop washer can slide left and right on the screw.
Furthermore, the novel self-rebounding non-falling screw comprises a head of a rear section, a polished rod section of a middle section and an external thread section of a front section, wherein the external thread section is provided with external threads, a transition section is formed between the polished rod section and the external thread section, the stop groove is arranged on the external thread section, the rear end of the stop groove extends to the transition section, and a limit part is formed between the front end and the end part of the external thread section; the spring is sleeved on the polished rod section, the bushing is sleeved on the external thread section, one end of the spring is connected with the head of the screw in a propping and tight contact mode, and the other end of the spring is connected with the bushing in a propping and tight contact mode; the stop washer is connected with the stop groove on the external thread section in a sliding way through the guide convex block in the inner ring, and the stop washer can not fall off and can slide left and right in the stop groove through the limiting part.
Furthermore, the novel self-rebounding non-falling screw is characterized in that the spring is a conical compression spring with a small end and a large end, an inwards-concave stepped hole is formed in one side of the bushing corresponding to the spring, the diameter of the stepped hole corresponds to the large end of the spring, and the depth of the stepped hole can accommodate the compressed spring; the small end of a spring sleeved on the polished rod section is abutted and contacted with the head of the screw, the large end of the spring is clamped in a step hole sleeved on the external thread section, and the large end of the spring is abutted and contacted with the bushing through the step hole; the screw drives the spring to move towards the direction of the bushing and compress the spring under the action of axial external force, and the stop washer is synchronously driven to slide in the stop groove in the moving process of the screw.
Furthermore, the novel self-rebounding non-falling screw is characterized in that a countersunk head screw hole is further formed in the end face of the head along the axial direction of the head, an internal thread is arranged in the countersunk head screw hole, and the thread direction of the internal thread is the same as that of the external thread.
Furthermore, the novel self-rebounding non-falling screw is characterized in that the stop washer is an elastic metal flat washer or rubber flat washer, a protruding part corresponding to the guide bump is further arranged on the outer ring of the stop washer, and the protruding part is of an arc-shaped structure.
The invention also discloses a use method of the self-rebounding anti-falling screw, which comprises the following steps:
the method comprises the following steps: firstly, respectively sleeving a spring and a bush on a screw, so that one end of the spring is tightly propped against the screw, and the other end of the spring is clamped in the bush; then inserting the screw into a cover plate to be connected along the axial direction of the screw, sleeving a stop washer on the screw, enabling two guide lugs in the stop washer to be respectively embedded in corresponding stop grooves, sliding the stop washer outwards or inwards to enable the stop washer to be positioned in a counter bore of the cover plate, and finally buckling the cover plate on an equipment base body to finish the screw installation before fastening the cover plate to be connected;
step two: applying a rightward axial outward force to the screw, wherein the screw moves rightwards towards the cover plate to be connected under the action of the axial outward force to drive the spring to move along with the screw, so that the spring is compressed on the bushing in the moving process; the stop washer is always kept in the counter bore of the cover plate in the process that the guide lug slides along the stop groove; the screw movement termination surface is the left end surface of the bushing far away from the outer side of the cover plate, so that the cover plate is fastened;
step three: and applying a leftward axial external force to the screw, wherein the screw is far away from the direction of the cover plate under the action of the axial external force and moves leftward, the compressed spring extends and moves leftward along with the screw, and the moving stop surface of the screw is the free length of the spring, so that the aim of releasing the locking of the cover plate is fulfilled.
Compared with the prior art, the novel self-rebounding non-falling screw and the use method thereof have the beneficial effects that: because the screw is sleeved with the spring and the bush, the stop washer capable of sliding left and right along the external thread section is arranged in the external thread section on the screw, the stop washer is arranged in the counter bore in the cover plate to be connected, the screw drives the spring to move towards the cover plate under the action of axial external force, so that the spring is compressed in the bush, wherein the spring adopts a conical compression spring, the height size of the compressed spring can be reduced, and the aim of fastening the base body through the cover plate is fulfilled through the external thread section on the screw; when the screw is in a free state, the screw is completely separated from the base body internal thread hole, and the screw completely returns without interfering with the internal thread in the internal thread hole, so that the problem of inconvenient separation caused by contact between the screw and the internal thread hole is avoided in the cover plate removing process; meanwhile, due to the support of the spring, no matter the screw is in a horizontal or vertical state, the screw is always kept in a vertical state with the cover plate, so that when the screw is assembled again, the screw does not need to be righted in an auxiliary mode, and great convenience is brought to assembly.
Therefore, by adopting the self-rebounding non-falling screw and the use method thereof, the screw can be always kept in a vertical state with the cover plate after being disassembled and is kept on the cover plate, so that the optimal state is kept for the reassembly, and the centralizing butt joint time is shortened; meanwhile, in the screw dismounting process, the screw can be completely separated from the mounting hole of the base body, and the problem of damage caused by collision or scraping in the dismounting process is avoided. The cover plate is more convenient and quick to mount or dismount, has the advantages of simple structure, convenience in mounting and use, strong practicability and wide application range, and is particularly suitable for being used on a thin cover plate.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the construction of the screw of the present invention;
FIG. 3 is a schematic view of the structure of FIG. 2 taken along line A-A;
FIG. 4 is a schematic diagram of the spring of the present invention in its free state;
FIG. 5 is a schematic view of the spring of FIG. 4 in a compressed state;
FIG. 6 is a schematic view of the construction of the bushing of the present invention;
FIG. 7 is a schematic view of the stop washer of the present invention before deformation;
FIG. 8 is a schematic view of the retainer washer of FIG. 7 after deformation;
FIG. 9 is a schematic view of the retainer washer of FIG. 7 after deformation during use;
fig. 10 is a schematic view of the present invention in a free state when assembled for use.
Fig. 11 is a schematic view of the present invention in an assembled state in use.
Shown in the attached drawings: 1-screw, 11-head, 12-polished rod section, 13-transition section, 14-external thread section, 15-stop groove, 16-hexagon socket hole, 2-spring, 3-bushing, 31-step hole, 4-stop washer, 41-inner ring, 42-outer ring, 43-guide projection, 44-bulge and 5-cover plate.
Detailed Description
To further illustrate the concepts of the present invention, embodiments of the present invention will be described in further detail below with reference to the following drawings:
as shown in fig. 1 to 8, the novel self-rebounding non-falling screw comprises a screw 1, a spring 2, a bushing 3 and a stop washer 4, wherein the stop washer 4 is configured to be a circular ring structure having an inner ring 41 and an outer ring 2, two guide protrusions 43 distributed in a symmetrical state are arranged on the inner ring 41, two stop grooves 15 corresponding to the guide protrusions 43 are arranged on the screw, the spring 2 and the bushing 3 are coaxially sleeved on the screw 1, one end of the spring 2 abuts against the screw 1, and the other end of the spring is clamped in the bushing 3; the stop washer 4 is sleeved on the screw 1 through the inner ring 41 and is in sliding connection with the stop groove 15 through the guide convex block 43, so that the stop washer 4 can slide left and right on the screw 1.
Further, the novel self-rebounding non-falling screw of the present invention, wherein the screw 1 comprises a head 11 with a rear section, a polish rod section 12 with a middle section and an external thread section 14 with a front section, an external thread is provided on the external thread section 14, a transition section 13 is formed between the polish rod section 12 and the external thread section 14, the stop groove 15 is provided on the external thread section 14, and the rear end of the stop groove 15 extends to the transition section 13, while the front end and the end of the external thread section 14 form a limit part; and the end surface of the head 11 is also provided with a hexagon socket 16 along the axial direction, and the direction of the hexagon socket is the same as the thread direction of the external thread; the spring 2 is sleeved on the polished rod section 12, the bushing 3 is sleeved on the external thread section 14, one end of the spring 2 is connected with the head 11 of the screw 1 in a propping and tight contact mode, and the other end of the spring is connected with the bushing 3 in a propping and tight contact mode; the stop washer 4 is slidably connected with the stop groove 15 on the external thread section 14 through the guide projection 43 in the inner ring 41, and the stop washer 4 is prevented from falling off by the limiting part and can slide left and right in the stop groove 15.
Further, the novel self-rebounding non-falling screw is characterized in that the spring 2 is a conical compression spring with a small end and a large end, an inwardly recessed stepped hole 31 is formed in one side of the bushing 3 corresponding to the spring 2, a groove is formed in the bottom of the stepped hole 31, the diameter of the stepped hole 31 corresponds to the large end of the spring 2, and the depth of the stepped hole 31 can accommodate the compressed spring 2; the small end of a spring 2 sleeved on the polished rod section 12 is abutted and contacted with the head 11 of the screw 1, the large end of the spring is clamped in a stepped hole 31 sleeved on the external thread section 14, and the large end of the spring 2 is abutted and contacted with the bushing 3 through the stepped hole 31; the screw 1 drives the spring 2 to move towards the bushing 3 under the action of axial external force, the spring 2 is compressed, and the stop washer 4 is synchronously driven to slide in the stop groove 15 in the moving process of the screw 1.
Further, the novel self-rebounding non-falling screw is provided by the invention, wherein the stop washer 4 is a metal flat washer or a rubber flat washer with elasticity, a protruding portion 44 corresponding to the guide bump 43 is further arranged on the outer ring 42 of the stop washer 4, and the protruding portion 44 is provided with an arc-shaped structure.
As shown in fig. 9 to 11, the invention also discloses a use method of the self-rebounding non-falling screw, which comprises the following steps:
the method comprises the following steps: firstly, respectively sleeving a spring 2 and a bush 3 on a screw 1, so that one end of the spring 2 is tightly propped against the screw 1, and the other end of the spring is clamped in the bush 3; then inserting the screw 1 into a cover plate 5 to be connected along the axial direction of the screw, sleeving the stop washer 4 on the screw 1, respectively embedding the guide protrusions 43 of two of the stop washers 4 into the corresponding stop grooves 15, sliding the stop washers 4 outwards or inwards to enable the stop washers 4 to be positioned in the counter bores of the cover plate 5, and finally buckling the cover plate 5 on the equipment base body to finish the screw installation before fastening the cover plate 5 to be connected;
step two: applying a rightward axial external force to the screw 1, wherein the screw 1 moves rightwards towards the direction of a cover plate 5 to be connected under the action of the axial external force, and the spring 2 is driven to move along with the screw 1, so that the spring 2 is compressed on the bushing 3 in the moving process; the stop washer 4 keeps the stop washer 4 in the counter bore of the cover plate 5 all the time when the guide lug 43 slides along the stop groove 5; the movement termination surface of the screw 1 is the left end surface of the bush 3 far away from the outer side of the cover plate 5, so that the cover plate 5 can be fastened;
step three: apply an axial external force left for screw 1, screw 1 is kept away from apron 5 direction under the effect of axial external force, moves left, and compressed spring 2 extends, moves left along with screw 1, screw 1 removes the terminal surface and is spring 2 free length, reaches and removes locking apron 5 purpose.
The novel self-rebounding non-falling screw is characterized in that two stop grooves 15 distributed in a symmetrical state are arranged in an external thread section 14 on the screw 1, the stop grooves 15 cannot be communicated with the front end portion of the screw 1, a limiting portion is formed between the stop grooves 15 and the end portion, and the limiting portion is used for ensuring that the stop washer 4 cannot slip out of the stop grooves 15 in the sliding process.
As for the selection of the spring 2, a conical compression spring having a small end and a large end is used, which enables to reduce the height dimension of the spring 2 after compression.
As for the bush 3, since the bush 3 is provided with the stepped hole 31 recessed inward on the side corresponding to the spring 2 and the bottom of the stepped hole 31 is formed with a groove, the stepped hole 31 is provided so as to be able to accommodate a conical compression spring. As for the thickness of the bush 3 and the depth of the stepped hole 31, they may be determined according to the size of the spring 3. Meanwhile, the groove machined at the bottom of the stepped hole 31 is used for clamping the large end of the spring 2, so that the spring 2 is prevented from falling off the bushing.
In addition, the stop washer 4 is selected to be a metal flat washer or a rubber flat washer having elasticity, and a protrusion 44 corresponding to the guide protrusion 43 is further provided on the outer ring 42 of the stop washer 4, and the protrusion 44 is provided in an arc-shaped configuration. In use, the locking washer 4 is inserted into the screw 1 via its inner ring 41, the two guide cams 43 in the inner ring 41 of the locking washer 4 are aligned with the locking grooves 15 on the male thread section 14, and a special setting tool is used to apply a pressure in the direction of the projections 44 in the outer ring 42 of the locking washer 4, so that the locking washer 4 is deformed and is locked into the locking grooves 15, which ensures that the locking washer 4 is located in the cover plate 5 to be connected.
The novel self-rebounding non-falling screw has the working principle that: before installation, a mounting hole is firstly formed at a corresponding position of the cover plate connected with the screw 1, and a counter bore corresponding to the stop washer 4 is formed at the mounting hole, so that the stop washer 4 can be accommodated by the processed counter bore. In the using process, the big end of the conical compression spring with the small end and the big end is clamped into the stepped hole 31 in the bushing 3 to ensure that the big end cannot be separated; then the bush 3 with the spring 2 is sleeved on the screw 1 together to form a combination, the combination is inserted into the mounting hole of the cover plate 5 together, the polished rod section 12 of the screw 1 passes through the cover plate 5, then the stop collar 4 is sleeved on the end surface of the external thread section 14, the guide lug 43 in the inner ring 41 of the stop collar 4 and the stop groove 15 on the external thread section 14 are aligned with each other, and a special mounting tool is used for applying pressure in the direction of the bulge 44 in the outer ring 42 of the stop collar 4 to deform the stop collar 4 and clamp the stop collar 4 into the stop groove 15, so that the stop collar 4 can be ensured to be positioned in the cover plate 5 to be connected, and the mounting process before the screw is used is finished.
When the base body needs to be connected by the cover plate 5, a countersunk screw is inserted into a countersunk screw hole 16 on the head part 11, and because an internal thread is arranged in the countersunk screw hole 16, the thread direction of the internal thread is the same as that of the external thread; applying a rightward axial external force to the screw 1 by using a countersunk head screw, wherein the screw 1 moves rightwards towards the direction of a cover plate 5 to be connected under the action of the axial external force, and drives the spring 2 to move along with the screw 1, so that the spring 2 is compressed on the bushing 3 in the moving process; the stop washer 4 keeps the stop washer 4 in the counter bore of the cover plate 5 all the time when the guide lug 43 slides along the stop groove 5; the movement termination surface of the screw 1 is the left end surface of the bush 3 far away from the outer side of the cover plate 5, so that the cover plate 5 can be fastened;
when the base body needs to be disassembled, the countersunk head screw is inserted into the countersunk head screw hole 16 in the head part 11, a leftward axial external force is applied to the screw 1 by the countersunk head screw, the screw 1 is far away from the cover plate 5 under the action of the axial external force and moves leftward, the compressed spring 2 extends and moves leftward along with the screw 1, the moving end surface of the screw 1 is the free length of the spring 2, and the purpose of releasing the locking of the cover plate 5 is achieved.
Therefore, by adopting the self-rebounding non-falling screw and the use method thereof, when the self-rebounding non-falling screw is in a free state, as shown in fig. 10, the screw is completely separated from the internal thread hole of the base body, and is completely withdrawn without interfering with the internal thread, so that the cover plate 5 is removed, and the separation is inconvenient and the like due to the contact between the screw 1 and the threaded hole; and screw 1 is under free state, because the support of spring 2, no matter screw 1 is in level or vertical state, screw 1 keeps the vertical state with apron 5 all the time to when the reassembly again, do not need appurtenance to right screw 1, countersunk screw also can normal use, brought very big facility like this for the assembly. When the self-rebounding non-falling screw is installed as shown in fig. 11, the spring 2 sleeved on the screw 1 does not need to be accommodated and combined inside the cover plate 5, and the adopted spring is in a conical structure, so that the height size of the compressed spring 2 is reduced, the overall length of the screw can be reduced, and particularly when the screw is applied to a thin cover plate, the requirement on the opening of the cover plate is greatly reduced, and the overall strength of the cover plate is further improved.
In conclusion, the self-rebounding non-falling screw can be always kept in a vertical state with the cover plate after being disassembled and is kept on the cover plate, so that the optimal state is reserved for reassembly, and the centralizing butt joint time is shortened; meanwhile, in the screw dismounting process, the screw can be completely separated from the mounting hole of the base body, and the problem of damage caused by collision or scraping in the dismounting process is avoided. The cover plate is more convenient and quick to mount or dismount, has the advantages of simple structure, convenience in mounting and use, strong practicability and wide application range, and is particularly suitable for being used on a thin cover plate.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a novel from resilience screw that does not deviate from which characterized in that: the locking device comprises a screw (1), a spring (2), a bushing (3) and a stop washer (4), wherein the stop washer (4) is arranged to be of a circular ring structure with an inner ring (41) and an outer ring (42), two guide convex blocks (43) which are distributed in a symmetrical state are arranged on the inner ring (41), two stop grooves (15) corresponding to the guide convex blocks (43) are arranged on the screw (1), the spring (2) and the bushing (3) are coaxially sleeved on the screw (1), one end of the spring (2) is tightly pressed on the screw (1), and the other end of the spring is clamped in the bushing (3); the stop washer (4) is sleeved on the screw (1) through the inner ring (41) and is in sliding connection with the stop groove (15) through the guide convex block (43), so that the stop washer (4) can slide left and right on the screw (1).
2. The novel self-rebounding non-falling screw according to claim 1, is characterized in that: the screw (1) comprises a head (11) with a rear section, a polished rod section (12) with a middle section and an external thread section (14) with a front section, wherein an external thread is arranged on the external thread section (14), a transition section (13) is formed between the polished rod section (12) and the external thread section (14), the stop groove (15) is arranged on the external thread section (14), the rear end of the stop groove (15) extends to the transition section (13), and the front end and the end part of the external thread section (14) form a limit part; the spring (2) is sleeved on the polished rod section (12), the bushing (3) is sleeved on the external thread section (14), one end of the spring (2) is connected with the head (11) of the screw (1) in a propping and tight contact manner, and the other end of the spring is connected with the bushing (3) in a propping and tight contact manner; the stop washer (4) is connected with the stop groove (15) on the external thread section (14) in a sliding way through a guide convex block (43) in the inner ring (41), and the stop washer (4) can not fall off and can slide left and right in the stop groove (15) through a limiting part.
3. The novel self-rebounding non-falling screw as claimed in claim 2, wherein: the spring (2) is a conical compression spring with a small end and a large end, an inwards-recessed step hole (31) is formed in one side, corresponding to the spring (2), of the bushing (3), the hole diameter of the step hole (31) corresponds to the large end of the spring (2), the depth of the step hole (31) can accommodate the compressed spring (2), the width of the step hole (31) is the same as the diameter of a steel wire of the spring (2), the large end of the spring (2) can be embedded into the step hole (31), and the bushing (3) is connected with the spring (2); wherein the small end of the spring (2) sleeved on the polished rod section (12) is propped against and contacted with the head (11) of the screw (1) for connection, the large end of the spring is clamped in a step hole (31) sleeved on the external thread section (14), and the large end of the spring (2) is propped against and contacted with the bushing (3) through the step hole (31) for connection; the bolt (1) drives the spring (2) to move towards the direction of the bushing (3) under the action of axial external force, the spring (2) is compressed, and the stop washer (4) is synchronously driven to slide in the stop groove (15) in the moving process of the bolt (1).
4. The novel self-rebounding non-falling screw as claimed in claim 2, wherein: the end face of the head (11) is also provided with a hexagon socket (16) along the axial direction, and the thread direction of the hexagon socket and the thread direction of the external thread are the same.
5. The novel self-rebounding non-falling screw according to claim 1, is characterized in that: the stop washer (4) is an elastic metal flat washer or rubber flat washer, a protruding part (44) corresponding to the guide bump (43) is further arranged on the outer ring (42) of the stop washer (4), and the protruding part (44) is of an arc-shaped structure.
6. Use of a self-rebounding non-drop screw according to any one of claims 1 to 5, characterized in that it comprises the following steps:
the method comprises the following steps: firstly, respectively sleeving a spring (2) and a bushing (3) on a screw (1) to enable one end of the spring (2) to be tightly propped against the screw (1) and the other end of the spring to be tightly propped against the bushing (3); then inserting the screw (1) into a cover plate (5) to be connected along the axial direction of the screw, sleeving a stop washer (4) on the screw (1), respectively embedding guide lugs (43) of two of the stop washers (4) into corresponding stop grooves (15), sliding the stop washers (4) outwards or inwards to enable the stop washers (4) to be positioned in counter bores of the cover plate (5), and finally buckling the cover plate (5) on an equipment base body to finish the screw installation before fastening the cover plate (5) to be connected;
step two: applying a rightward axial outward force to the screw (1), wherein the screw (1) moves rightwards towards the direction of a cover plate (5) to be connected under the action of the axial outward force to drive the spring (2) to move along with the screw (1), so that the spring (2) is compressed on the bushing (3) in the moving process; the stop washer (4) is always kept in the counter bore of the cover plate (5) when the guide lug (43) slides along the stop groove (5); the moving termination surface of the screw (1) is the left end surface of the bushing (3) far away from the outer side of the cover plate (5), so that the aim of fastening the cover plate (5) is fulfilled;
step three: exert an axial external force left for screw (1), screw (1) is kept away from apron (5) direction under the effect of axial external force, moves left, and compressed spring (2) extend, follows screw (1) and moves left, screw (1) remove the terminal surface and be spring (2) free length, reach and remove locking apron (5) purpose.
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|---|---|---|---|
| CN202210578360.4A CN114810771A (en) | 2022-05-26 | 2022-05-26 | Novel self-rebounding non-falling screw and use method |
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| CN202210578360.4A CN114810771A (en) | 2022-05-26 | 2022-05-26 | Novel self-rebounding non-falling screw and use method |
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| CN114810771A true CN114810771A (en) | 2022-07-29 |
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