CN217494084U

CN217494084U - Stud screwing-in air screwdriver head

Info

Publication number: CN217494084U
Application number: CN202221072212.7U
Authority: CN
Inventors: 白晓青; 康磊磊
Original assignee: Zhejiang Fixed Star Transmission Technology Co ltd
Current assignee: Zhejiang Fixed Star Transmission Technology Co ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-09-27
Anticipated expiration: 2032-05-06

Abstract

The utility model discloses a double-end stud screwing-in wind screwdriver head, which comprises a spring jacket, an intermediate shaft and a connecting piece which are coaxially and sequentially connected; the spring jacket comprises a jacket connecting part connected with the middle shaft and a hollow chuck body, and the outer diameter of the chuck body is gradually increased from one end close to the jacket connecting part to one end far away from the jacket connecting part; an outer sleeve nut is sleeved on the outer side of the jacket connecting part, and the jacket connecting part is connected with the outer sleeve nut through threads; the connecting piece is sleeved with a sleeve. The utility model discloses an outer nut and spring clamp cover matched with mode make the spring clamp cover press from both sides tightly or loosen through outer nut at spring clamp cover axial removal to can make the spring clamp cover carry the stud of different sizes and carry out the screw in and screw up, labour saving and time saving promotes production efficiency.

Description

Stud screwing-in air screwdriver head

Technical Field

The utility model belongs to the technical field of fastener instrument technique and specifically relates to a stud revolves into wind and criticizes head is related to.

Background

The stud is a cylindrical fastener with threads at two ends, and is widely applied to electric power, chemical engineering, oil refining, valves, railways, bridges, steel structures, steam friction accessories, machinery, boiler steel structures, hoisting towers, large-span steel structures, large buildings and the like. The double-end stud connection is that one end of the double-end stud is screwed into a screw hole of one of the connected pieces, the other end of the double-end stud passes through a through hole of the other connected piece, then a washer is sleeved on the double-end stud, and a nut is screwed. The assembly of the stud can be completed only by a special tool, and the generally adopted stud tightening device rotates a screw sleeve by means of external force, screws the tail end of the stud into the screw sleeve, screws the head end of the stud into a base body by using jacking force generated by the contact of a jacking rod in the screw sleeve and the end face of the stud, and finally screws the screw sleeve down from the stud by using reverse rotating force.

The stud tightening device is disclosed in Chinese patent literature, the publication number of the stud tightening device is CN101543985A, the publication date is 2009-09-30, the front section of the central hole of the screw sleeve is a unthreaded hole, the diameter of the unthreaded hole is larger than the middle section but smaller than the rear section, a first internal thread is processed at the middle section of the central hole of the screw sleeve, the lead angle of the first internal thread corresponds to that of the stud, a second internal thread is processed at the rear section of the central hole of the screw sleeve, and the lead angle of the second internal thread is 7-10 degrees; the front end of the ejector rod extends into the rear section of the central hole of the thread insert, the external thread of the front part of the ejector rod is matched with the second internal thread, the rear end of the ejector rod extends into the sleeve and is fixed with the sleeve through the driving pin, the sleeve front end is provided with a sleeve stop block, and the sleeve stop block and the thread insert stop block arranged at the rear end of the thread insert are mutually limited in the circumferential direction. The technology can effectively prevent the stud from withdrawing from the base body along with the threaded sleeve, ensures the success rate of stud assembly, greatly improves the assembly efficiency, and has the characteristics of simple structure, simple and convenient operation, reliable performance and the like. However, the screw sleeve of the technology is of an integral structure, the first section of internal thread and the second section of internal thread are integrated inside, the integrated structure is more, the manufacturing cost is high, and in the later use process, if the screw sleeve is damaged, the screw sleeve needs to be integrally replaced, so that the cost of the user is increased; in addition, the tightening device can only be used for tightening a stud with one size, when the radial diameter of the stud changes, the tightening devices with different corresponding sizes are required to be used for operation, and the operation process is complicated.

Disclosure of Invention

The utility model relates to an overcome among the prior art screw up not unidimensional stud and need use the device of screwing up of different corresponding sizes, make the loaded down with trivial details problem of operation process, a stud head is criticized to the wind of going into soon, adopt outer nut and spring clamp cover matched with mode, it makes the spring clamp cover press from both sides tightly or loosen at the axial removal of spring clamp cover through outer nut, thereby can make the spring clamp cover clip not the stud of equidimension carry out the screw in and screw up, time saving and labor saving, and the promotion production efficiency.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a stud screwing-in wind screwdriver head comprises a spring jacket, an intermediate shaft and a connecting piece which are coaxially and sequentially connected; the spring jacket comprises a jacket connecting part connected with the intermediate shaft and a hollow chuck body, and the outer diameter of the chuck body is gradually increased from one end close to the jacket connecting part to one end far away from the jacket connecting part; an outer sleeve nut is sleeved on the outer side of the jacket connecting part, and the jacket connecting part is connected with the outer sleeve nut through threads; the connecting piece is sleeved with a sleeve.

The utility model discloses well spring jacket's chuck body can press from both sides double-end stud tightly, and chuck body adopts the spring steel to make, cooperates corresponding thermal treatment technique, keeps good elasticity, and outer cap nut's rotation can make nut axial displacement let chuck body press from both sides tightly or loosen, consequently can clip the double-end stud in the certain size within range, and the sleeve is established to the cover on the connecting piece, can guarantee the quick hookup of wind batch head or throw off, and it is more convenient to operate.

Preferably, the chuck body is provided with a plurality of axially extending empty grooves, the chuck body comprises a circular truncated cone chuck part and a cylindrical chuck part, and the outer diameter of one end of the circular truncated cone chuck part, which is close to the cylindrical chuck part, is the same as the outer diameter of the cylindrical chuck part and is smaller than the outer diameter of one end of the circular truncated cone chuck part, which is far away from the cylindrical chuck part.

The utility model is provided with a plurality of empty grooves axially on the chuck body, so that a gap is arranged between each chuck arc part of the chuck body, and the gap is reduced or enlarged by the axial movement of the outer sleeve nut, thereby achieving the purpose of clamping or loosening the chuck body; in addition, when the outer sleeve nut axially moves on the cylindrical chuck part, the chuck body is not changed; when the outer sleeve nut has part which is overlapped with the circular table chuck part, the chuck body can clamp, and the more the overlapped part is, the tighter the chuck body clamps.

Preferably, the outer diameter of the intermediate shaft is smaller than that of the jacket connecting part, and the outer diameter of the intermediate shaft is larger than that of an inscribed circle of the radial section of the connecting piece. The size relationship among the intermediate shaft, the jacket connecting part and the connecting piece in the utility model is set, so that the outer sleeve nut can freely move in the axial direction and is not clamped by the intermediate shaft; meanwhile, the outer diameter of the intermediate shaft is larger than the radius of an inscribed circle of the radial section of the connecting piece, so that the sleeve sleeved on the connecting piece is limited by the intermediate shaft.

Preferably, the outer sleeve nut is provided with a first cylindrical hole and a second cylindrical hole which are concentric along the axial direction, and the first cylindrical hole is in threaded connection with the connecting part of the jacket; the radius of the second cylindrical hole is larger than that of the first cylindrical hole and smaller than the maximum outer diameter of the chuck body. The utility model discloses well first cylinder hole sets up the one end at outer nut chuck body round platform chuck portion, and second cylinder hole sets up the one end that is close to round platform chuck portion at outer nut, and all cylinder holes and outer nut all are coaxial settings, and first cylinder hole is used for along spring clamp cover axial displacement through the threaded connection of rotating control outer nut with pressing from both sides cover connecting portion, and the radius in second cylinder hole and the circle cross-section radius scope of round platform chuck portion then are used for injecing the size range of the double-ended screw that the spring clamp cover can press from both sides tightly.

Preferably, a through hole matched with the shape of the connecting piece is axially arranged in the sleeve, and a radial through hole and a set screw matched with each other are arranged on the side surface of the sleeve. The shape of the axially extending through hole of the sleeve in the utility model is matched with the shape of the connecting piece, so that the sleeve and the connecting piece can not slide relatively when rotating after being connected; in addition, the radial through hole and the set screw arranged on the side face of the sleeve can fix the connecting piece after the connecting piece and the sleeve are connected, so that the sleeve and the connecting piece are prevented from moving axially relative to each other.

Preferably, the connecting piece is further sleeved with a sleeve gasket, and the sleeve gasket is arranged on one side, close to the intermediate shaft, of the sleeve. The utility model discloses in still be provided with the cover pad between sleeve and countershaft, can reduce wind and criticize the head and screw up telescopic wearing and tearing of double-end screw in-process.

Preferably, the outer side of the outer sleeve nut is provided with patterns. The utility model discloses well overcoat nut lateral surface forms the decorative pattern through the annular knurl processing, can increase frictional force antiskid.

The utility model discloses following beneficial effect has: adopt outer nut and spring jacket matched with mode, make spring jacket clamp tight or relax at the axial removal of spring jacket through outer nut to make the spring jacket in the wind criticize the head can carry the not stud of equidimension to carry out the screw in and screw up, need change the problem of different wind criticize heads when having avoided screwing up not unidimensional stud, labour saving and time saving promotes production efficiency.

Drawings

FIG. 1 is an exploded view of a wind batch head according to the present invention;

FIG. 2 is a schematic view of the spring collet, the intermediate shaft and the connecting member of the present invention;

FIG. 3 is a cross-sectional view of the assembled air baton head of the present invention;

in the figure: 1. a sleeve; 2. sleeving a cushion; 3. a nut is sleeved; 4. a connecting member; 5. an intermediate shaft; 6. a spring jacket; 11. a radial through hole; 12. a set screw; 31. a first cylindrical bore; 32. a second cylindrical bore; 61. a jacket connecting portion; 62. a chuck body; 621. a cylindrical clip head; 622. a circular table clamping head part; 623. an empty groove; 624. a first insertion hole; 625. a second insertion hole; 626. and a third insertion hole.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

As shown in fig. 1, a stud-screw-in wind bit comprises a spring jacket 6, an intermediate shaft 5 and a connecting piece 4 which are coaxially and sequentially connected; the spring jacket comprises a jacket connecting part 61 connected with the middle shaft and a hollow chuck body 62, and the outer diameter of the chuck body is gradually increased from one end close to the jacket connecting part to one end far away from the jacket connecting part; the outer side of the jacket connecting part is sleeved with an outer sleeve nut 3, and the jacket connecting part is connected with the outer sleeve nut through threads; the cover is equipped with sleeve 1 on the connecting piece, still overlaps on the connecting piece to be equipped with cover pad 2, and the cover pad setting is close to one side of jackshaft at the sleeve.

As shown in fig. 2, the chuck body is provided with a plurality of axially extending empty slots 623, four empty slots are provided in the drawing to divide the chuck body into four pieces, the chuck body includes a circular table chuck portion 622 and a cylindrical chuck portion 621, and the outer diameter of the circular table chuck portion near the cylindrical chuck portion is the same as the outer diameter of the cylindrical chuck portion and is smaller than the outer diameter of the end far from the cylindrical chuck portion.

As shown in fig. 3, the outer diameter of the intermediate shaft is smaller than that of the collet coupler and larger than the radius of a circle inscribed in the radial section of the coupler. In the figure, a through hole matched with the shape of the connecting piece is axially arranged in the sleeve, the connecting piece is a square connecting piece, and the axial through hole in the sleeve is a square through hole, so that the outer diameter of the intermediate shaft is larger than the radius of an inscribed circle of a square section; the side of the sleeve is provided with a radial through hole 11 and a set screw 12 which are matched with each other. The hollow part of the collet body comprises a first insertion hole 624, a second insertion hole 625 and a third insertion hole 626 which are coaxially arranged in sequence, wherein the first insertion hole is arranged at the outermost side of the hollow part, and the radius of the first insertion hole is smaller than the outer diameter of the connecting part of the jacket; the radius of the second insertion hole is smaller than that of the first insertion hole; the third insertion hole is formed in a conical shape at the innermost side of the hollow portion, and the radius of the bottom surface of the third insertion hole is the same as the radius of the second insertion hole.

The outer sleeve nut is provided with a first cylindrical hole 31 and a second cylindrical hole 32 which are concentric along the axial direction, and the first cylindrical hole is in threaded connection with the jacket connecting part; the radius of the second cylindrical hole is larger than that of the first cylindrical hole and smaller than the maximum outer diameter of the chuck body, namely smaller than the maximum outer diameter of the circular table chuck body. The outer side of the outer sleeve nut is provided with decorative patterns.

The utility model discloses well spring jacket's chuck body can press from both sides double-ended stud tightly, and chuck body adopts the spring steel to make, cooperates corresponding thermal treatment technique, keeps good elasticity, and outer sleeve nut's rotation can make nut axial displacement let chuck body press from both sides tightly or relax, consequently can clip the double-ended stud in the certain size within range, and the sleeve is established to the cover on the connecting piece, can guarantee wind criticize the quick hookup of head or throw off, and it is more convenient to operate.

The size relationship among the intermediate shaft, the jacket connecting part and the connecting piece in the utility model is set, so that the outer sleeve nut can freely move in the axial direction and is not clamped by the intermediate shaft; meanwhile, the outer diameter of the intermediate shaft is larger than the radius of the inscribed circle of the radial section of the connecting piece, so that the sleeve sleeved on the connecting piece is limited by the intermediate shaft.

The utility model discloses well first cylinder hole sets up the one end at outer nut chuck body round platform chuck portion, and second cylinder hole sets up the one end that is close to round platform chuck portion at outer nut, and all cylinder holes and outer nut all are coaxial settings, and first cylinder hole is used for along spring clamp cover axial displacement through the threaded connection of rotating control outer nut with pressing from both sides cover connecting portion, and the radius in second cylinder hole and the circle cross-section radius scope of round platform chuck portion then are used for injecing the size range of the double-ended screw that the spring clamp cover can press from both sides tightly. The outer side surface of the outer sleeve nut is knurled to form patterns, so that the friction force can be increased, and the outer sleeve nut is prevented from slipping.

The shape of the axially extending through hole of the sleeve in the utility model is matched with the shape of the connecting piece, so that the sleeve and the connecting piece can not slide relatively when rotating after being connected; in addition, the radial through hole and the set screw arranged on the side face of the sleeve can fix the connecting piece after the connecting piece and the sleeve are connected, so that the sleeve and the connecting piece are prevented from moving axially relative to each other. And a sleeve gasket is arranged between the sleeve and the intermediate shaft, so that the abrasion of the sleeve of the wind screwdriver head in the process of screwing the double-headed screw can be reduced.

In the embodiment of the utility model, the spring jacket is matched with the outer sleeve nut through left-hand threads, when in use, one end part of the stud is screwed into the target hole, the other end of the stud is inserted into the hollow part of the spring jacket, the outer sleeve nut after knurling treatment is held by hand, and the clockwise rotation of the air screwdriver head is driven through the clockwise rotation of the sleeve and the connecting piece; the clockwise rotation direction in fig. 3 is the rotation of the upper half of the sleeve into the image, the lower half of the sleeve rotating outward of the image; in the rotating process, the outer sleeve nut moves relative to the spring jacket to the left side in the drawing, the chuck body of the spring jacket clamps the stud, and at the moment, the friction force between the hand holding the outer sleeve nut and the outer sleeve nut is not enough to resist the rotating power of the wind screwdriver head, so that the stud is driven to be screwed into the target hole to be screwed. Then the screwdriver head rotates anticlockwise, the outer sleeve nut moves rightwards relative to the spring jacket axially under the action of friction force between hands and the outer sleeve nut, so that the spring jacket loosens the double-end stud, and the double-end stud is screwed in; the hand holds the outer sleeve nut lightly in the whole process.

The above embodiments are further illustrated and described for the purposes of understanding, and not intended to limit the invention to any particular form, modification, equivalent arrangement, or improvements which may be made within the spirit and principles of the invention.

Claims

1. A double-end stud screwing-in wind screwdriver head is characterized by comprising a spring jacket (6), an intermediate shaft (5) and a connecting piece (4) which are coaxially and sequentially connected; the spring jacket (6) comprises a jacket connecting part (61) connected with the intermediate shaft (5) and a hollow chuck body (62), and the outer diameter of the chuck body (62) is gradually increased from one end close to the jacket connecting part (61) to one end far away from the jacket connecting part (61); the outer side of the jacket connecting part (61) is sleeved with an outer sleeve nut (3), and the jacket connecting part (61) is connected with the outer sleeve nut (3) through threads; the sleeve (1) is sleeved on the connecting piece (4).

2. The double-ended stud screwing-in wind batch head according to claim 1, wherein a plurality of empty grooves (623) extending along the axial direction are formed in the chuck body (62), the chuck body (62) comprises a circular table chuck head part (622) and a cylindrical chuck head part (621), and the outer diameter of one end, close to the cylindrical chuck head part (621), of the circular table chuck head part (622) is the same as that of the cylindrical chuck head part (621) and is smaller than that of one end, far away from the cylindrical chuck head part (621).

3. A double-ended stud wind-driving batch head according to claim 1, characterised in that the outer diameter of the intermediate shaft (5) is smaller than the outer diameter of the collet coupling (61), the outer diameter of the intermediate shaft (5) being larger than the radius of the circle inscribed in the radial cross-section of the connecting piece (4).

4. A stud-screw-in tuyere according to claim 1, 2 or 3, wherein said outer sleeve nut (3) is provided with a first cylindrical hole (31) and a second cylindrical hole (32) which are concentric in the axial direction, said first cylindrical hole (31) being threadedly connected to the collet coupling portion (61); the radius of the second cylindrical hole (32) is larger than that of the first cylindrical hole (31) and smaller than the maximum outer diameter of the chuck body (62).

5. A double-ended stud wind-driving bit according to claim 1, 2 or 3, wherein the sleeve (1) is provided with a through hole matching with the shape of the connecting piece (4) along the axial direction, and the side surface of the sleeve is provided with a radial through hole (11) and a set screw (12) matching with each other.

6. A double-ended stud wind-driving bit according to claim 1, 2 or 3, wherein the connecting member (4) is further sleeved with a sleeve gasket (2), and the sleeve gasket (2) is arranged on one side of the sleeve (1) close to the intermediate shaft (5).

7. A double-ended stud screw-in tuyere according to claim 4, wherein the outer side of the outer sleeve nut (3) is provided with a pattern.