CN105397717B - Double threaded screw mounting device and inside and outside silk swivel nut mounting device - Google Patents

Abstract

Silk swivel nut mounting device inside and outside a kind of double threaded screw mounting device of present invention offer and one kind, it is related to the light instrument technical field for screw thread element, double threaded screw mounting device includes the sleeve being vertically arranged, the transmission pin being laterally arranged and the mandril being vertically arranged in the inner cavity of sleeve, mandril can move up and down in the inner cavity of sleeve along its axis direction, the lower part of sleeve is equipped with the internal thread for connecting double threaded screw to be installed, it is driven pin drive connection sleeve and mandril, sleeve drives mandril rotation by being driven pin, there is travelling angle between sleeve and mandril.Double threaded screw and inside and outside silk swivel nut are installed on workpiece using double threaded screw mounting device provided by the invention and inside and outside silk swivel nut mounting device can improve efficiency of assembling, reduction assembly work labor intensity.

Description

Double-headed screw installation device and inner and outer screw sleeve installation device

technical field

The invention relates to the technical field of portable tools for tightening screw elements, in particular to a double-ended screw rod installation device and an inner and outer thread screw sleeve installation device.

Background technique

In order to improve the service life of the threaded connection part on the aluminum workpiece, the thread is usually not directly tapped on the aluminum part in actual production, but the thread is strengthened by embedding a steel inner and outer screw sleeve or a double-ended screw on the aluminum part. The strength and wear resistance of the connecting part prolong the service life.

The method shown in Fig. 1 is commonly used to install the internal and external screw sleeve of steel on the aluminum workpiece: the first step, select the bolt 12 that matches with the inner thread of the internal and external screw sleeve 11, screw on the nut 13 on the bolt 12, and The bolt 12 is screwed into the inner and outer screw sleeve 11 and the nut 13 is tightly connected with the inner and outer screw sleeve 11, and the axial force generated between the nut 13 and the inner and outer screw sleeve 11 is used to make the thread of the inner and outer screw sleeve 11 and the bolt The frictional force between the screw teeth of 12 increases to prevent the inner and outer threaded sleeves 11 from loosening. In the second step, screw the bolt 12 or the nut 13 with a wrench to drive the inner and outer screw sleeves 11 to rotate, and screw the inner and outer screw sleeves 11 into the pre-opened threaded holes on the workpiece A. The third step is to clamp the nut 13 and the bolt 12 respectively with two spanners, separate the nut 13 from the inner and outer screw sleeve 11 by a certain distance through the torque of the wrench, and then unscrew the bolt 12 from the inner and outer screw sleeve 11. Using this method to install the inner and outer screw sleeves has the following disadvantages: low assembly efficiency and high labor intensity.

The method of installing a double-ended screw on an aluminum workpiece is similar to that of installing an inner and outer screw sleeve. It includes the following steps: Step 1. Select two nuts that match the threads on the double-ended screw, and use two wrenches to tighten the two nuts. The nuts are tightened, and the axial force generated between the two nuts is used to increase the friction between the threads of the nut and the threads of the bolt to prevent the nut from loosening. The second step is to use a wrench to screw a nut on the top. Driven by the nut, the double-ended screw rotates and screws into the workpiece. The third step is to clamp the two nuts with two spanners, separate the upper nut from the lower nut by a certain distance through the torque of the wrench, and then unscrew the two nuts from the double-ended screw in turn. The above-mentioned method for assembling the double-ended screw is the same as the method for assembling the screw sleeve, but also has the defects of low assembly efficiency and high labor intensity.

Contents of the invention

The technical problems to be solved by the present invention are: 1. To provide a double-ended screw installation device which can improve the assembly efficiency and reduce the labor intensity of the assembly work. 2. To provide an installation device for inner and outer screw sleeves that can improve assembly efficiency and reduce labor intensity of assembly work.

In order to solve the above technical problem 1, the present invention adopts the following technical solution: a double-ended screw installation device, including a vertically arranged sleeve, a horizontally arranged transmission pin, and a top vertically arranged in the inner cavity of the sleeve. The push rod can move up and down in the inner cavity of the sleeve along its axial direction, the lower part of the sleeve is provided with an internal thread for connecting the double-ended screw rod to be installed, and the transmission pin is connected to the sleeve and The ejector rod, the sleeve drives the ejector rod to rotate through the transmission pin, and there is a swimming angle between the sleeve and the ejector rod.

Wherein, a transmission pin hole is opened on the side wall of the sleeve, and the transmission pin passes through the transmission pin hole and is fixedly connected to the ejector rod. The transmission pin hole and the transmission pin are loosely matched, so that the sleeve There is a swimming angle with the ejector rod.

Preferably, the upper part of the sleeve is connected with a joint that can be matched with the air bit/electric bit.

Further, the lower part of the coupling head is set in the inner cavity of the sleeve and is threadedly connected with the inner cavity wall of the sleeve, and a pair of connecting pin holes oppositely arranged are opened on the side wall of the sleeve, and the connecting pins A connecting pin is arranged in the hole, and the two ends of the connecting pin are respectively penetrated in the two connecting pin holes, and the middle part of the connecting pin passes through the lower part of the connecting head.

In order to solve the above-mentioned technical problem 2, the present invention adopts the following technical solution: an inner and outer screw sleeve installation device, including a vertically arranged sleeve, a horizontally arranged transmission pin, and a vertically arranged in the inner cavity of the sleeve. The ejector rod and the connecting screw vertically arranged under the ejector rod, the ejector rod can move up and down in the inner cavity of the sleeve along its axial direction, the upper part of the connecting screw extends into the inner cavity of the sleeve and connects with the sleeve The outer peripheral surface of the lower part of the connecting screw is provided with an external thread for connecting the inner and outer screw sleeves to be installed, and the transmission pin drives the connecting sleeve and the ejector rod, and the sleeve drives the ejector rod through the transmission pin Rotate, there is a swimming angle between the sleeve and the push rod.

Wherein, a transmission pin hole is opened on the side wall of the sleeve, and the transmission pin passes through the transmission pin hole and is fixedly connected to the ejector rod. The transmission pin hole and the transmission pin are loosely matched, so that the sleeve There is a swimming angle with the ejector rod.

Preferably, the upper part of the sleeve is connected with a joint that can be matched with the air bit/electric bit.

Further, the lower part of the coupling head is inserted into the inner cavity of the sleeve and threadedly connected with the inner cavity wall of the sleeve, and a pair of connecting pin holes oppositely arranged are opened on the side wall of the sleeve, and the connecting pin holes A connecting pin is arranged inside, and the two ends of the connecting pin are respectively passed through the two connecting pin holes, and the middle part of the connecting pin passes through the lower part of the connecting head.

The beneficial effects obtained by the present invention are: the double-ended screw installation device provided by the present invention is equipped with a push rod in the inner cavity of the sleeve. In the inner cavity of the sleeve until it is supported by the ejector rod and cannot be rotated, then turn the sleeve to screw the other end of the double-ended screw into the workpiece, and then turn the sleeve in the opposite direction, because there is a gap between the sleeve and the ejector rod. Swimming angle, at this time, the sleeve rotates at a certain angle first, that is, before the ejector rod rotates, a certain gap is formed between the pressing end of the ejector rod and the double-ended screw, and the pressing force of the ejector rod on the double-ended screw is removed. Then the sleeve drives the ejector rod to rotate, and the double-ended screw comes out of the sleeve and stays embedded in the workpiece. Because a certain gap is formed between the top pressure end of the ejector rod and the double-ended screw, the sleeve and the double-ended screw are connected. When the first screw is separated, the friction between the ejector rod and the double-ended screw will not drive the double-ended screw that has been embedded in the workpiece to unscrew in the opposite direction. During the above operation, the operator only needs to use one tool (it can be The double-ended screw can be installed on the workpiece by turning the sleeve with a wrench. Compared with the traditional installation method, the labor intensity can be greatly reduced and the assembly efficiency can be greatly improved.

The working principle of the inner and outer screw sleeve installation device provided by the present invention is similar to that of the double-ended screw installation device. It also has a push rod in the inner cavity of the sleeve. In actual use, the connecting screw is first screwed into the inner cavity of the sleeve until its upper end face is resisted by the mandrel and cannot rotate, then screw the inner and outer screw sleeves onto the connecting screw and put the upper end face of the inner and outer screw sleeves against the lower end face of the sleeve (the connecting screw is equivalent to the traditional The bolts and sleeves in the installation method are equivalent to the nuts in the traditional installation method), and then turn the sleeve to screw the inner and outer threaded sleeves into the workpiece, and then turn the sleeve in reverse, because there is movement between the sleeve and the ejector rod At this time, the sleeve rotates at a certain angle first, that is, the lower end surface of the sleeve is separated from the upper end surface of the inner and outer screw sleeves to form a certain gap (equivalent to separating the nut and the inner and outer screw sleeves by a certain distance in the traditional installation method) ), and then the sleeve drives the ejector rod and the connecting screw to rotate, so that the connecting screw is twisted out of the inner and outer screw sleeves, and the inner and outer screw sleeves are finally embedded in the workpiece, which is the same as the double-headed screw installation device used to install the double-headed screw. Like the screw, in the above operation process, the operator only needs to use a tool (which can be a wrench) to rotate the sleeve to install the inner and outer screw sleeves on the workpiece. Compared with the traditional installation method, the labor intensity can be greatly reduced , the assembly efficiency has been greatly improved.

Description of drawings

Fig. 1 is the schematic diagram of installing inner and outer screw sleeves in a traditional way;

Fig. 2 is the overall structural representation of double-ended screw installation device in the present invention;

Fig. 3 is the overall structure schematic diagram of the installation device of inner and outer thread screw sleeves in the present invention;

Fig. 4 is a schematic diagram of the cooperation relationship between the drive pin hole and the drive pin in the present invention;

The reference signs are:

1——Sleeve 2——Drive pin 3——Jump

4——coupling head 5——connecting pin 6——connecting screw 1a——driving pin hole

1b——Connecting pin hole 11——Inner and outer screw sleeve 12——Bolt 13——Nut

A - Workpiece.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", etc. or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention.

The so-called "swimming angle" in the present invention refers to the part M and part N in transmission connection, the part M is rotated by a certain angle α, and the part N does not rotate. The above-mentioned angle α is the movement between the part M and the part N. angle.

In addition, it needs to be explained in advance that the double-ended screw installation device and the inner and outer thread screw sleeve installation device provided by the present invention have a common and remarkable feature, that is, both of them are provided in the sleeve 1 for pressing against the double-ended screw. and the ejector rod 3 connecting the screw rod 6, the sleeve 1 drives the ejector rod 3 to rotate through the transmission pin 2, and there is a swimming angle between the sleeve 1 and the ejector rod 3. Under the pressure of the ejector rod 3, the double The double-ended screw and the connecting screw 6 will not loosen with the sleeve 1 during the process of the double-ended screw and the inner and outer screw sleeve 11. After the installation of the double-ended screw and the inner and outer screw is completed, the sleeve 1 first rotates in the opposite direction at a certain angle, so that The lower end surface of the sleeve 1 is first separated from the upper end surface of the inner and outer screw sleeve 11 to form a certain gap, and at the same time, the top pressure of the push rod 3 on the double-ended screw and the connecting screw 6 is removed, so that it is convenient to install the device and the double-ended screw and the inner and outer screws. The thread screw sleeve 11 separates.

As shown in Figures 2 and 4, a double-ended screw installation device includes a vertically arranged sleeve 1, a transversely arranged transmission pin 2, and a push rod 3 vertically arranged in the inner cavity of the sleeve 1, and the push rod 3. It can move up and down in the inner cavity of the sleeve 1 along its axial direction. The lower part of the sleeve 1 is provided with an internal thread for connecting the double-ended screw to be installed. The transmission pin 2 is connected to the sleeve 1 and the ejector rod 3 through transmission. The barrel 1 drives the push rod 3 to rotate through the transmission pin 2, and there is a swimming angle between the sleeve 1 and the push rod 3.

The double-ended screw installation device provided by the above embodiment is provided with a push rod 3 in the inner cavity of the sleeve 1. In actual use, it is only necessary to screw the double-ended screw to be installed into the lower end of the sleeve 1 from the lower end of the sleeve 1. until it is resisted by the ejector rod 3 and cannot rotate, then turn the sleeve 1, screw the other end of the double-ended screw into the workpiece A, and then reversely rotate the sleeve 1, because the sleeve 1 and the ejector rod 3 There is a swimming angle between them. At this time, the sleeve 1 rotates at a certain angle first, that is, before the ejector rod 3 rotates, a certain gap is formed between the pressing end of the ejector rod 3 and the double-ended screw, and the ejector rod 3 pairs of double-ended screws. The jacking pressure of the screw is removed, and then the sleeve 1 drives the ejector rod 3 to rotate, and the double-ended screw comes out of the sleeve 1 and stays embedded in the workpiece A. First, a certain gap is formed. When the sleeve 1 is separated from the double-ended screw, the friction between the ejector rod 3 and the double-ended screw will not drive the double-ended screw embedded in the workpiece A to reversely unscrew. During the above operation process, the operator only needs to use a tool (which can be a wrench) to rotate the sleeve 1 to install the double-ended screw on the workpiece A. Compared with the traditional installation method, the labor intensity can be greatly reduced and the assembly efficiency can be improved. has been greatly improved.

It needs to be explained in advance that in the double-ended screw installation device and the inner and outer thread screw sleeve installation device provided by the present invention, there are many implementations for allowing there to be a swimming angle between the sleeve 1 and the push rod 3, for example, it can be used in the sleeve A transmission pin hole 1a is set on the side wall of the barrel 1, and the transmission pin 2 is passed through the transmission pin hole 1a and fixedly connected to the ejector rod 3. The transmission pin hole 1a is loosely matched with the transmission pin 2, so that the sleeve 1 and the There is a swimming angle between the push rods 3 . In addition, it is also possible to set a drive pin hole on the outer peripheral surface of the push rod 3 (this embodiment is not shown in the accompanying drawings), pass the drive pin 2 through the drive pin hole on the push rod 3 and connect its end It is fixedly connected to the ejector rod 3, and the drive pin hole on the ejector rod 3 is also loosely matched with the drive pin 2, so that there is a swimming angle between the sleeve 1 and the ejector rod 3. Of course, it is also possible to set transmission pin holes on the side wall of the sleeve 1 and the outer peripheral surface of the push rod 3 (this embodiment is not shown in the accompanying drawings), and the transmission pin 2 passes through the above-mentioned transmission pin holes to ensure the above-mentioned There is a certain amount of looseness between all the transmission pin holes and the transmission pin 2, which can also make there is a swimming angle between the sleeve 1 and the push rod 3. On the basis of understanding the concept of the present invention, those skilled in the art should understand that, in addition to the above-mentioned embodiment, the swimming angle between the sleeve 1 and the push rod 3 can also be realized in other ways. In order to simplify the expression, the applicant does not List them one by one.

As a preferred solution based on the above-mentioned embodiment, a coupling head 4 that can be matched with an air bit/electric bit can also be connected to the upper part of the sleeve 1 . By setting the coupling head 4 on the upper part of the sleeve 1, the double-ended screw installation device can be used in conjunction with the wind / electric screwdriver. During the installation of the double-ended screw, the sleeve 1 is driven by the wind / electric screwdriver to further improve Improve the installation efficiency of the double-ended screw and reduce the labor intensity of workers.

Further, in order to ensure the reliability of the connection between the coupling head 4 and the sleeve 1 (when the double-headed screw installation device is used in conjunction with the wind batch/electric batch, the sleeve 1 rotates at a higher speed under the drive of the wind batch/electric batch, this The connection between the coupling head 4 and the sleeve 1 needs to be stable and reliable), the lower part of the coupling head 4 can be set in the inner cavity of the sleeve 1 and screwed to the inner cavity wall of the sleeve 1, and at the same time A pair of connecting pin holes 1b oppositely arranged are also opened on the side wall of the sleeve 1, and connecting pins 5 are arranged in the connecting pin holes 1b, and the two ends of the connecting pins 5 are respectively penetrated in the two connecting pin holes 1b. , the middle part of the connecting pin 5 penetrates the lower part of the coupling head 4 . Threading the lower part of the coupling head 4 to the inner cavity wall of the sleeve 1 ensures the stability of the connection between the coupling head 4 and the sleeve 1, and on this basis, the connection pin 5 is used to string the coupling head 4 and the sleeve 1 together This can prevent the threaded connection between the coupling head 4 and the sleeve 1 from loosening and the coupling head 4 from being loosened from the sleeve 1 .

Based on the same concept as the above-mentioned double-ended screw installation device, the present invention also provides an inner and outer screw sleeve installation device, which, as shown in Figures 3 and 4, includes a vertically arranged sleeve 1, a laterally arranged transmission pin 2, The ejector rod 3 vertically arranged in the inner chamber of the sleeve 1 and the connecting screw 6 arranged vertically below the ejector rod 3, the ejector rod 3 can move up and down in the inner chamber of the sleeve 1 along its axis direction, and the connecting screw The upper part of 6 extends into the inner cavity of sleeve 1 and is threadedly connected with sleeve 1. The outer peripheral surface of the lower part of connecting screw 6 is provided with an external thread for connecting the inner and outer screw sleeves to be installed, and the transmission pin 2 is connected to the sleeve by transmission. 1 and the ejector rod 3, the sleeve 1 drives the ejector rod 3 to rotate through the transmission pin 2, and there is a swimming angle between the sleeve 1 and the ejector rod 3.

The working principle of the inner and outer screw sleeve installation device provided by the above embodiment is similar to that of the double-ended screw installation device. It also has a push rod 3 in the inner cavity of the sleeve 1. In actual use, the connecting screw 6 is screwed into the sleeve first. In the inner cavity of the barrel 1, until its upper end surface is resisted by the ejector rod 3 and cannot rotate, then screw the inner and outer screw sleeves 11 onto the connecting screw 6 and put the upper end surfaces of the inner and outer screw sleeves 11 against the sleeve 1 The lower end face (at this time, the connecting screw 6 is equivalent to the bolt 12 in the traditional installation method, and the sleeve 1 is equivalent to the nut 13 in the traditional installation method), then turn the sleeve 1 to screw the inner and outer screw sleeves 11 into the workpiece A, and then Rotate the sleeve 1 in the opposite direction, because there is a swimming angle between the sleeve 1 and the ejector rod 3, at this time, the sleeve 1 first rotates at a certain angle, that is, the lower end surface of the sleeve 1 is separated from the upper end surface of the inner and outer screw sleeve 11 A certain gap is formed (equivalent to separating the nut 13 from the inner and outer screw sleeve 11 by a certain distance in the traditional installation method), and then the sleeve 1 drives the ejector rod 3 and the connecting screw 6 to rotate, thereby separating the connecting screw 6 from the inner and outer wires. The screw sleeve 11 is twisted out, and the inner and outer wire screw sleeve 11 is finally embedded in the workpiece A, which is the same as the installation of the double-ended screw with the double-ended screw installation device. During the above operation, the operator only needs to use one tool (you can It is a wrench) to install the inner and outer screw sleeve 11 on the workpiece A by rotating the sleeve 1. Compared with the traditional installation method, the labor intensity is greatly reduced and the assembly efficiency is greatly improved.

In order to make there is a swimming angle between the sleeve 1 and the push rod 3, the same implementation as that of the double-ended screw installation device can also be used in the installation device of the inner and outer screw sleeves, that is, there are openings on the side wall of the sleeve 1. The transmission pin hole 1a, the transmission pin 2 passes through the transmission pin hole 1a and is fixedly connected to the ejector rod 3, the transmission pin hole 1a and the transmission pin 2 are loosely matched, so that there is a gap between the sleeve 1 and the ejector rod 3 Purpose of swimming angle.

Similarly, a coupling head 4 that can be matched with the air bit/electric bit can also be connected to the upper part of the sleeve 1 of the inner and outer thread screw sleeve installation device. The role played by the coupling head 4 provided on the upper part of the sleeve 1 of the inner and outer thread screw sleeve installation device is the same as that played in the double-ended screw installation device, and will not be repeated here.

Like the double-ended screw installation device, in order to ensure the reliability of the connection between the coupling head 4 and the sleeve 1, the lower part of the above-mentioned coupling head 4 can also be arranged in the inner cavity of the sleeve 1 and connected to the inner cavity of the sleeve 1. At the same time, a pair of connecting pin holes 1b oppositely arranged are also opened on the side wall of the sleeve 1, and connecting pins 5 are arranged in the connecting pin holes 1b, and the two ends of the connecting pins 5 are respectively pierced on the two sides. In the connecting pin hole 1b, the middle part of the connecting pin 5 penetrates the lower part of the coupling head 4. The effect obtained by adopting the above-mentioned connection method between the coupling head 4 and the sleeve 1 is the same as that in the double-ended screw installation device, and will not be repeated here.

The above-mentioned embodiments are preferred implementation solutions of the present invention. In addition, the present invention can also be realized in other ways, and any obvious replacements are within the scope of protection of the present invention without departing from the concept of the technical solution.

In order to make it easier for those skilled in the art to understand the improvement of the present invention compared to the prior art, some drawings and descriptions of the present invention have been simplified, and for the sake of clarity, some other elements have been omitted in this application document, Those of ordinary skill in the art should realize that these omitted elements may also constitute the content of the present invention.

Claims (8)

1. a kind of double threaded screw mounting device, it is characterised in that：Including the sleeve being vertically arranged（1）, the lateral trundle that is arranged Nail（2）And it is vertically arranged at the sleeve（1）Inner cavity in mandril（3）, the mandril（3）It can be in sleeve（1）Inner cavity in It is moved up and down along its axis direction, the sleeve（1）Lower part be equipped with internal thread for connecting double threaded screw to be installed, institute State transmission pin（2）Drive connection sleeve（1）And mandril（3）, the sleeve（1）By being driven pin（2）Drive mandril（3）Turn It is dynamic, the sleeve（1）With mandril（3）Between exist travelling angle.

2. double threaded screw mounting device according to claim 1, it is characterised in that：The sleeve（1）Side wall on open up There is transmission pin hole（1a）, the transmission pin（2）From transmission pin hole（1a）In pass through and be fixedly connected on mandril（3）, the biography Dynamic pin hole（1a）With transmission pin（2）Coordinate looseness, so that sleeve（1）With mandril（3）Between exist travelling angle.

3. double threaded screw mounting device according to claim 1 or 2, it is characterised in that：The sleeve（1）Top connection Having one can be with pneumatic screwdriver head/matched coupling head of electric screwdriver head（4）.

4. double threaded screw mounting device according to claim 3, it is characterised in that：The coupling head（4）Lower part be set to Sleeve（1）Inner cavity in and and sleeve（1）Internal chamber wall be threadedly coupled, the sleeve（1）Side wall on be further opened with a pair of of phase To the connecting pin bores of setting（1b）, the connecting pin bores（1b）It is interior to be equipped with connecting pin（5）, the connecting pin（5）Two ends It is arranged in two connecting pin bores respectively（1b）In, the connecting pin（5）Middle part run through coupling head（4）Lower part.

5. silk swivel nut mounting device inside and outside one kind, it is characterised in that：Including the sleeve being vertically arranged（1）, the laterally transmission that is arranged Pin（2）, be vertically arranged at the sleeve（1）Inner cavity in mandril（3）And it is vertically arranged at mandril（3）The connection spiral shell of lower section Bar（6）, the mandril（3）It can be in sleeve（1）Inner cavity in moved up and down along its axis direction, the connecting screw（6）It is upper Portion stretches into sleeve（1）Inner cavity in and and sleeve（1）It is threadedly coupled, the connecting screw（6）Lower, outer perimeter face be equipped with use In the external screw thread for connecting inside and outside silk swivel nut to be installed, the transmission pin（2）Drive connection sleeve（1）And mandril（3）, described Sleeve（1）By being driven pin（2）Drive mandril（3）Rotation, the sleeve（1）With mandril（3）Between exist travelling angle.

6. inside and outside silk swivel nut mounting device according to claim 5, it is characterised in that：The sleeve（1）Side wall on open Equipped with transmission pin hole（1a）, the transmission pin（2）From transmission pin hole（1a）In pass through and be fixedly connected on mandril（3）, described It is driven pin hole（1a）With transmission pin（2）Coordinate looseness, so that sleeve（1）With mandril（3）Between exist travelling angle.

7. inside and outside silk swivel nut mounting device according to claim 5 or 6, it is characterised in that：The sleeve（1）Top connect Being connected to one can be with pneumatic screwdriver head/matched coupling head of electric screwdriver head（4）.

8. inside and outside silk swivel nut mounting device according to claim 7, it is characterised in that：The coupling head（4）Lower part set In sleeve（1）Inner cavity in and and sleeve（1）Internal chamber wall be threadedly coupled, the sleeve（1）Side wall on be further opened with a pair The connecting pin bores being oppositely arranged（1b）, the connecting pin bores（1b）It is interior to be equipped with connecting pin（5）, the connecting pin（5）Two end Head is arranged in two connecting pin bores respectively（1b）In, the connecting pin（5）Middle part run through coupling head（4）Lower part.