CN209599123U - A kind of studs screwing device - Google Patents

Abstract

The utility model discloses a kind of studs screwing devices, stud cylinder including being arranged studs, the front end of stud cylinder is provided with fixed position-limiting unit, fixed position-limiting unit includes fastening nut limit chamber, gasket limit chamber and circular cavity, sleeve is arranged with outside stud cylinder, the handwheel that sleeve one end is equipped with the spoke of radially even distribution and is connected with spoke, springlock is provided between sleeve and stud cylinder, sleeve activity top pressure spring lock, springlock activity squeezes the outer wall of studs in stud cylinder, by lifting and pressing handwheel, the folding of springlock can be achieved, and then it adjusts elastic between studs and screwing device, the rear end of stud cylinder is provided with adjusting position-limiting unit, to adjust the length in reserve of studs.Compared with the prior art, the utility model solves existing large labor intensity during existing studs screws, easy coat puncture wound and adjusts the technical problems such as studs length in reserve difficulty.

Description

A kind of studs screwing device

Technical field

The utility model relates to development machine large scale machine parts package technique field, particularly relates to a kind of studs and screw Device.

Background technique

It is polished rod that studs, which refers to that there are screw thread, centre in both ends, has connection and fastens the stud of each component function, main Apply: (1) main body is large scale equipment, needs to install attachment, such as mechanical sealing base, deceleration rack etc., studs One end is screwed on main equipment, installs after attachment that studs gasket and fastening nut screw on other end band；(2) main body by Multiple components are constituted, and all parts have biggish thickness, can preferentially use studs at this time；(3) for some keys Component needs stud to have enough intensity and inconvenient (interior) the hexagonal double-ended bolt connection outside, as concrete roof truss, roof girder are outstanding Sheet beam-and-rail etc. is also usually needed using studs.

For large-scale driving machine equipment, the studs nominal diameter of use is generally large, such as 42mm, 48mm, 56mm is even up to 64mm, and studs is first sequentially placed into the corresponding threaded hole of main equipment, adopts later by usual worker Mode manually screws studs until reaching corresponding position.In view of being relatively large in diameter for studs, normal length Also longer, in addition the connection frictional force between studs one end and threaded hole is larger, it is therefore desirable to which worker provides enough tight Grip is removed the studs of the control other end and is screwed.Due to processing, the screw thread section surface of studs all exists very Mostly without removing clean burr and iron filings, even if worker is also usually set about by bundle with gloves, and the iron filings in hand are pricked It is also difficult to remove, so the process for screwing studs usually causes no small psychological pressure to worker.

On the other hand, threaded hole is put into predetermined position is screwed to from studs, need to screw many circles, in addition have One group of stud of component just up to five or six ten, or even have many groups, this has undoubtedly aggravated the feeling of fatigue of worker's wrist.In addition, for Some special parts and processes, such as the main driving flange and cutterhead flange of shield machine are mounted on double in main driving flange Header stud length in reserve (the distance between structural plane is arrived in studs end face) just has specific value, and control errors is required to exist Within ± 1mm, and the studs length in reserve of distinct device generally also difference, usual worker can make corresponding amount Block directly uses steel ruler as with reference to the length in reserve to adjust studs, this process needs to expend for a long time.

Utility model content

For the deficiency in above-mentioned background technique, the utility model proposes a kind of studs screwing devices, solve existing Studs skills such as existing large labor intensity, easy coat puncture wound and adjusting stud length in reserve difficulty during screwing Art problem.

The technical solution of the utility model is achieved in that a kind of studs screwing device, including is arranged studs Stud cylinder, the front end of stud cylinder is provided with fixed position-limiting unit, and fixed position-limiting unit includes fastening nut limit chamber, stud Cylinder is outer to be arranged with sleeve, and springlock, sleeve activity top pressure spring lock are provided between sleeve and stud cylinder, and springlock activity squeezes The outer wall of studs in stud cylinder, can be relatively fixed by studs and stud cylinder by springlock and separates.When relatively solid Timing can easily screw studs, and when mutually separating, stud cylinder can be freely rotated with respect to studs, in turn Fastening nut limit chamber is able to drive fastening nut and screws to the predetermined position of studs, and the rear end of stud cylinder is provided with tune Position-limiting unit is saved, the length that adjusting position-limiting unit can guarantee that studs stretches out meets the requirement of length in reserve, avoids more Secondary measurement it is cumbersome.

The fixed position-limiting unit includes the gasket limit chamber of front port setting, and gasket limit chamber is convenient for studs gasket Installation, close to gasket limit chamber, the fastening nut limit chamber is set, fastening nut limit chamber can be used for being clamped fastening nut, And fastening nut is driven to rotate relative to studs, until installing to predetermined position.The rear of fastening nut limit chamber is double end The circular cavity that stud passes through, the adjusting position-limiting unit includes the stop nut being slidably matched with circular cavity, with limit spiral shell Box thread is equipped with limit stud, stop nut can be driven axially to move by rotary spacing stud.Pass through Mobile stop nut can reserve the space of the length in reserve of studs, the table when the end of studs top is to stop nut Show and has had reached predetermined position.

Further, the rear end of the stud cylinder is provided with external screw thread, and the end for being provided with annular is matched with external screw thread Lid, the sleeve are set between the end cap of stud cylinder and fastening nut limit chamber, and annular end cap can prevent sleeve from sliding, institute It states limit stud rotation to be connected between sleeve and end cap, i.e., annular end cap can also prevent limit stud from axial displacement occurs.

Further, the end cap successively includes the narrow internal diameter section of end cap, the wide internal diameter section of end cap and end cap internal thread segment, end cap Internal thread segment is connect with the external screw thread of the stud cylinder, and the limit stud includes the screw rod being threadedly engaged with stop nut, spiral shell The rear of bar is connected with limit plate, and limit plate is located in the wide internal diameter section of the end cap, and the rear of limit plate is connected with knob, knob In the narrow internal diameter section of end cap.The internal diameter of the narrow internal diameter section of the end cap of end cap is intended to greatly than knob three-dimensional size, therefore can in end To facilitate the length reserved value for adjusting studs.

The lockhole being interlinked to the outside in being offered on the side wall of the stud cylinder, the longitudinal section of lockhole be it is trapezoidal, it is trapezoidal shorter Bottom edge is located at the inner wall of stud cylinder, and the springlock is movably arranged in lockhole.Springlock include matched with lockhole it is soft Lock body, the top of lock body and abdomen are planar structure, and the rear end of lock body offers notch, and the two sidewalls of notch offer together The connecting hole of axis is mounted on connecting shaft in connecting hole, connecting spring is provided between two connecting shafts, connecting spring is by two The other end of connecting shaft presses against on the side wall of lockhole.The front end of lock body is provided with round and smooth protrusion, the side wall of protrusion and lockhole Between be provided with support spring, the sleeve, which is moved forward and backward, to be realized lock body and the extruding of studs and separates.

Further, being interlinked to the outside in setting on the side wall of the stud cylinder has measuring flume, the axial length and limit of measuring flume The scope of activities of position nut is corresponding, and the two sides outside measuring flume are provided with the graduation mark along stud cylinder axial direction, the set The observation slot for observing and measuring slot and graduation mark is provided on cylinder.The value of graduation mark is position where graduation mark away from double end spiral shell The distance of column gasket spacing zone front end, moves stop nut by adjusting knob, until stop nut front end The position of scale needed for face reaches, therefore different studs length, the scope of application can be reserved according to actual design needs It is relatively wide.

Further, handwheel is set outside the sleeve, spoke is provided between handwheel and sleeve, the setting of handwheel is further Improve installation convenience.

Further, the rear inner wall portion of the stud cylinder is in axial direction provided with guide groove, on the stop nut It is provided with the guide pad being slidably matched with guide groove, the setting of guide groove and guide pad limits stop nut can only be along axial fortune It is dynamic, to realize the function of reserving different studs length.

Further, axial guiding concave surface is provided on the outer wall of the stud cylinder, be provided on the inner wall of sleeve with The guiding convex surface that guiding concave surface matches, guiding concave surface are greater than the length on guiding convex surface along axial length.Guiding in sleeve Convex surface is matched with the guiding concave surface outside stud cylinder, on the one hand strictly limits hoop rotation of the sleeve with respect to stud cylinder, another Within the scope of the axial movement of sleeve can be limited in centainly by aspect, to realize its function of controlling springlock folding.

Further, there are two the guide groove settings, two guide grooves are symmetrical arranged, the guiding concave surface setting four A, four guiding concave surfaces are arranged at equal intervals along the circumferential surface of stud cylinder.

The utility model can easily and fast install studs compared with prior art, and can be avoided burr and stab, It also effectively solves the problems, such as to adjust stud length in reserve difficulty simultaneously.Springlock squeezes double in the case where the pressure of sleeve radially acts on Header stud acts on the axial compressive force of stop nut to effectively reduce studs to limit its rotation, and then reduces Along axially displaced and deformation bring error after being pressurized because of stop nut, limit stud and end cap.

Springlock is to provide for enough operating spaces equipped with notch and is used to place connecting spring and connecting shaft, lock body Convex design is for the ease of the welding with support spring.Round and smooth protrusion is to reduce between sleeve as changeover portion Friction, to extend the service life of springlock.Lock body abdomen is designed to plane, is to increase between studs Contact area, to increase restraining force.

The spoke of sleeve and the Combination Design of handwheel can comfortably and rapidly screw fastening nut and studs, Facilitate subsequent lifting and pressing to effectively control the folding of springlock.The internal diameter of sleeve is bigger than the outer diameter of stud cylinder, thereon The measuring flume that the observation slot being equipped with not only is longer than and is wider than on stud cylinder, does not thus influence regardless of sleeve is moved along axial direction Observe graduation mark.

Limit stud is connected through a screw thread with stop nut, since the axial movement in limit stud edge is by bolt cylinder and end cap Limitation can control the movement of stop nut by adjusting knob, and stop nut is rotated without generating axial move in order to prevent It is dynamic, it is equipped with the guide pad of fastening nut on it, and the guide groove opened up with stud cylinder matches, to realize regulatory function.

Detailed description of the invention

It, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of the utility model embodiment It is briefly described, it should be apparent that, the drawings in the following description are merely some embodiments of the present invention, for ability For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached Figure.

Fig. 1 is the structural schematic diagram of the utility model

Fig. 2 is the vertical schematic cross-sectional view of Fig. 1；

Fig. 3 is the lateral schematic cross-sectional view of Fig. 1；

Fig. 4 is the structural schematic diagram of stud cylinder front end in Fig. 1；

Fig. 5 is the structural schematic diagram in stud tube rear end portion in Fig. 1；

Fig. 6 is the structural schematic diagram of springlock in Fig. 2；

Fig. 7 is the explosive view of Fig. 6；

Fig. 8 is the structural schematic diagram that position-limiting unit is adjusted in Fig. 1；

Fig. 9 is the structural schematic diagram of Fig. 1 middle sleeve；

Figure 10 is vertical cross-sectional when fastening nut just arrives to fastening nut limit chamber；

Figure 11 has just contacted vertical cross-sectional when stop nut for the end of studs；

Figure 12 is vertical cross-sectional when studs fastens completely with fastening nut；

Figure 13 is vertical cross-sectional when the utility model is removed from the studs fastened.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are under that premise of not paying creative labor Every other embodiment obtained, fall within the protection scope of the utility model.

Embodiment 1, a kind of studs screwing device can be used for fastening nut 7 and studs gasket as shown in Figure 10 8 are installed on studs 9, and the length in reserve of studs 9 can be made to meet the requirements.As shown in Figure 1, the utility model packet The stud cylinder 1 for being arranged studs 9 is included, the front end of stud cylinder 1 is provided with fixed position-limiting unit, as shown in Figure 2 and Figure 4, Gu Fixed limit bit location includes that gasket the limit chamber 1-10, gasket limit chamber 1-10 of front port setting are convenient for the double end spiral shell of studs 9 The installation of column gasket 8.Gasket limit chamber 1-10 is provided with fastening nut limit chamber 1-9, fastening nut limit chamber 1-9 can be used In clamping fastening nut 7, and fastening nut 7 is driven to rotate relative to studs 9, until installing to predetermined position.

As shown in Figure 1, sleeve 2 is arranged with outside the stud cylinder 1, as shown in Figures 2 and 3, between sleeve 2 and stud cylinder 1 It is provided with springlock 3,3 activity of springlock squeezes the outer wall of studs 9 in stud cylinder 1, can be by studs by springlock 3 9 is relatively fixed and separate with stud cylinder 1.When studs 9 and stud cylinder 1 are relatively fixed, sleeve 2 and stud cylinder can be passed through 1 pair of studs 9 is easily screwed, and when studs 9 is separated with 1 phase of stud cylinder, stud cylinder 1 can be with respect to studs 9 are freely rotated, and then fastening nut limit chamber 1-9 is able to drive fastening nut 7 and screws to the predetermined position of studs 9.

As shown in Figs. 1-5, the vertical of the lockhole 1-7 being interlinked to the outside in offering on the side wall of the stud cylinder 1, lockhole 1-7 cuts Face be it is trapezoidal, trapezoidal shorter bottom edge is located at the inner wall of stud cylinder 1, and the springlock 3 is movably arranged in lockhole 1-7.Such as Fig. 6 With shown in Fig. 7, springlock 3 includes the soft lock body 3-6 matched with lockhole 1-7, and the top of lock body 3-6 and abdomen are flat Face structure.The abdomen of lock body is designed to plane, is in order to increase the contact area between studs 9, to increase constraint Power.The top design of lock body squeezes springlock 3 at plane, convenient for 2 activity of sleeve, and then is easy to implement the folding of springlock 3.Lock The rear end of body 3-6 offers notch 3-5, and the two sidewalls of notch 3-5 offer coaxial connecting hole 3-4, pacify in connecting hole 3-4 Equipped with connecting shaft 3-2, connecting spring 3-3 is provided between two connecting shaft 3-2.Two opposite one end connecting shaft 3-2 are all provided with It is equipped with retention bead 3-1, connecting spring 3-3 is connected between two retention bead 3-1, and then connecting spring 3-3 can be by two The other end of connecting shaft 3-2 presses against on the side wall of lockhole 1-7.The front end of lock body 3-6 is provided with round and smooth protrusion, protrusion and lock Support spring 3-7 is provided between the side wall of hole 1-7, the sleeve 2 is moved forward and backward realization to the extruding of lock body 3-6 and loosens, And then the abdomen of lock body 3-6 can realize extruding and separation to studs 9.

As shown in Figures 2 and 3, the rear of the fastening nut limit chamber 1-9 is the circular cavity 1- that studs 9 passes through 8, it is matched with circular cavity 1-8 and is provided with adjusting position-limiting unit, the length that studs 9 stretches out can be guaranteed by adjusting position-limiting unit Degree meets the requirement of length in reserve, avoid repeatedly measure it is cumbersome.As illustrated in figures 1 and 8, adjusting position-limiting unit includes and circle The stop nut 6 that shape cavity 1-8 is slidably matched is threadedly engaged with stop nut 6 and is provided with limit stud 5, passes through rotary spacing Stud 5 can drive stop nut 6 axially to move.The reserved of studs 9 can be reserved by mobile stop nut 6 The space of length indicates to have had reached predetermined position when the end of studs 9 top is to stop nut 6.

Embodiment 2, a kind of studs screwing device, as shown in Figs. 1-5, the rear end of the stud cylinder 1 are provided with outer spiral shell Line 1-1, the end cap 4 for being provided with annular is matched with external screw thread 1-1, and the sleeve 2 is set in end cap 4 and the fastening of stud cylinder 1 Between nut limit chamber 1-9, annular end cap 4 can prevent sleeve 2 from sliding.The rotation of limit stud 5 is connected to sleeve 2 and end Between lid 4, i.e., annular end cap 4 can also prevent limit stud 5 from axial displacement occurs.

The other structures of the present embodiment are same as Example 1.

Embodiment 3, a kind of studs screwing device, as shown in Figures 2 and 3, the end cap 4 successively include the narrow internal diameter of end cap The external screw thread 1- of section 4-1, the wide internal diameter section 4-2 of end cap and end cap internal thread segment 4-3, end cap internal thread segment 4-3 and the stud cylinder 1 1 is threadedly coupled.The limit stud 5 includes the screw rod 5-3 being threadedly engaged with the thread segment 6-1 of stop nut 6, screw rod 5-3's Rear is connected with limit plate 5-2, and limit plate 5-2 is located in the wide internal diameter section 4-2 of the end cap, and the rear of limit plate 5-2 is connected with Knob 5-1, knob 5-1 are located in the narrow internal diameter section 4-1 of end cap.The internal diameter of the narrow internal diameter section 4-1 of the end cap of end cap 4 is than knob 5-1 three It is intended to greatly to size, therefore can conveniently adjust the length reserved value of studs in end.

The other structures of the present embodiment are same as Example 2.

Embodiment 4, a kind of studs screwing device are arranged on the side wall of the stud cylinder 1 as shown in Figure 1, Figure 4, Figure 5 Inside being interlinked to the outside has measuring flume 1-4, and the axial length for observing slot 1-4 is corresponding with the scope of activities of stop nut 6, measuring flume 1-4 External two sides are provided with the graduation mark 1-5 along 1 axial direction of stud cylinder, are provided on the sleeve 2 for observing and measuring slot The observation slot 2-5 of 1-4 and graduation mark 1-5.The value of graduation mark 1-5 is that the position where graduation mark 1-5 is limited away from studs gasket 8 The distance of position area front end makes stop nut 6 mobile, until 6 front end face of stop nut reaches institute by adjusting knob 5-1 The position of scale is needed, therefore different studs length can be reserved according to actual design needs, the scope of application is wider.

The other structures of the present embodiment are same as Example 3.

Handwheel 2-2, handwheel is arranged outside the sleeve 2 as shown in Fig. 1 and Fig. 9 in embodiment 5, a kind of studs screwing device Spoke 2-1 is provided between 2-2 and sleeve 2, the setting of handwheel 2-2 further improves installation convenience.

The other structures of the present embodiment can be identical as any one of embodiment 1-4.

Embodiment 6, a kind of studs screwing device, as shown in Fig. 2, Fig. 3, Fig. 5, the rear inner wall portion of the stud cylinder 1 It is in axial direction provided with guide groove 1-2, the guide pad 6- being slidably matched with guide groove 1-2 is provided on the stop nut 6 The setting of 2, guide groove 1-2 and guide pad 6-2 limit the adjustable range of stop nut 6, can avoid limiting in adjustment process Nut 6 is separated with limit stud 5.

The other structures of the present embodiment can be identical as any one of embodiment 1-5.

Embodiment 7, a kind of studs screwing device are provided with axial direction on the outer wall of the stud cylinder 1 as shown in Figure 2-5 Guiding concave surface 1-3, the guiding convex surface 2-3 matched with guiding concave surface 1-3 is provided on the inner wall of sleeve 2, is oriented to concave surface 1-3 It is greater than the length of guiding convex surface 2-3 along axial length.Guiding convex surface 2-3 in the sleeve 2 and guiding concave surface 1- outside stud cylinder 1 3 match, on the one hand strictly limit sleeve 2 with respect to stud cylinder 1 hoop rotation, on the other hand, can by cover 2 axial movement Within the scope of being limited in centainly, so that realizing its controls the function that springlock 3 opens and closes.

The other structures of the present embodiment are identical as implementing 6.

Embodiment 8, a kind of studs screwing device, there are two the guide groove 1-2 settings, and two guide groove 1-2 are symmetrical Setting, the guiding concave surface 1-3 are arranged four, and four guiding concave surface 1-3 are arranged at equal intervals along the circumferential surface of stud cylinder 1.

Other implementation method embodiments 7 of the present embodiment are identical.

The use process of the utility model are as follows: as shown in Figure 10, first according to the length in reserve of the studs of design 9, Adjusting knob 5-1 moves stop nut 6, until 6 front end face of stop nut reaches the position of required scale.Then By studs gasket 8 through on studs 9, and push to the surface of works 10.Then fastening nut 7 is placed on double end The end of stud 9 screws 2 ~ 3 and encloses, and fastening nut limit chamber 1-9 is then directed at fastening nut 7, and pushes until the two is complete In conjunction with.

Handwheel 2-2 is rotated clockwise after Self-fastening nut limit chamber 1-9 cooperates with fastening nut 7 referring to Figure 11 ~ Figure 13, Just start rotation more quickly and effortlessly, until a certain moment speed slows down and resistance is larger, the end of studs 9 at this time Face is in contact with the end face of stop nut 6.Sleeve 2 is pressed by handwheel 2-2, so that sleeve 2 squeezes springlock 3 and works, four Lock body 3-6 radially squeezes studs 9, the phase of circumferential friction power limit studs 9 and bolt cylinder 1 that lock body 3-6 is provided Mutually rotation.It then continues to rotate clockwise handwheel 2-2, until the lower end surface of stud cylinder 1 is in contact simultaneously with the surface of works 10 And be difficult to continue to rotate, fastening nut 7, studs gasket 8 and studs 9 have fastened at this time.Finally, lifting handwheel 2-2, Sleeve 2 makes the release of springlock 3 to the pressure and frictional force of studs 9, and the utility model can easily take from studs 9 Under.

The not detailed place of the utility model is conventional technical means known in those skilled in the art.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection scope within.

Claims (10)

1. a kind of studs screwing device, it is characterised in that: the stud cylinder (1) including being arranged studs (9), stud cylinder (1) Front end be provided with fixed position-limiting unit, fixed position-limiting unit includes fastening nut limit chamber (1-9), stud cylinder (1) housing It equipped with sleeve (2), is provided between sleeve (2) and stud cylinder (1) springlock (3), sleeve (2) activity top pressure spring lock (3), bullet Spring locks the outer wall that (3) activity squeezes stud cylinder (1) interior studs (9), and it is single that stud cylinder (1) rear end is provided with adjusting limit Member.

2. studs screwing device according to claim 1, it is characterised in that: the fixed position-limiting unit further includes front end The fastening nut limit chamber (1-9), fastening is arranged close to gasket limit chamber (1-10) in the gasket limit chamber (1-10) of mouth setting The rear of nut limit chamber (1-9) is the circular cavity (1-8) that studs passes through, and the adjusting position-limiting unit includes and circle The stop nut (6) that cavity (1-8) is slidably matched is threadedly engaged with stop nut (6) and is provided with limit stud (5).

3. studs screwing device according to claim 2, it is characterised in that: the rear end of the stud cylinder (1) is arranged There is external screw thread (1-1), the end cap (4) for being provided with annular is matched with external screw thread (1-1), the sleeve (2) is set in stud cylinder (1) between end cap (4) and fastening nut limit chamber (1-9), limit stud (5) rotation is connected to sleeve (2) and end cap (4) between.

4. studs screwing device according to claim 3, it is characterised in that: the end cap (4) successively includes that end cap is narrow The wide internal diameter section (4-2) of internal diameter section (4-1), end cap and end cap internal thread segment (4-3), end cap internal thread segment (4-3) and the stud External screw thread (1-1) connection of cylinder (1), limit stud (5) includes the screw rod (5-3) being threadedly engaged with stop nut (6), spiral shell The rear of bar (5-3) is connected with limit plate (5-2), and limit plate (5-2) is located in the wide internal diameter section (4-2) of the end cap, limit plate The rear of (5-2) is connected with knob (5-1), and knob (5-1) is located in the narrow internal diameter section (4-1) of end cap.

5. according to the described in any item studs screwing devices of claim 2-4, it is characterised in that: the side of the stud cylinder (1) The lockhole (1-7) being interlinked to the outside in being offered on wall, the longitudinal section of lockhole (1-7) be it is trapezoidal, trapezoidal shorter bottom edge is located at stud The inner wall of cylinder (1), the springlock (3) are movably arranged in lockhole (1-7), and springlock (3) includes matching with lockhole (1-7) Soft lock body (3-6), the top of lock body (3-6) and abdomen are planar structure, and the rear end of lock body (3-6) offers notch (3-5), the two sidewalls of notch (3-5) offer coaxial connecting hole (3-4), are mounted on connecting shaft (3- in connecting hole (3-4) 2) it, is provided with connecting spring (3-3) between two connecting shafts (3-2), connecting spring (3-3) is another by two connecting shafts (3-2) One end presses against on the side wall of lockhole (1-7), and the front end of lock body (3-6) is provided with round and smooth protrusion, raised and lockhole (1-7) It is provided between side wall support spring (3-7), the sleeve (2), which is moved forward and backward, realizes squeezing for lock body (3-6) and studs (9) Pressure and separation.

6. studs screwing device according to claim 5, it is characterised in that: be arranged on the side wall of the stud cylinder (1) It is interlinked to the outside measuring flume (1-4) in having, the axial length of measuring flume (1-4) is corresponding with the scope of activities of stop nut (6), measurement The external two sides of slot (1-4) are provided with the graduation mark (1-5) along stud cylinder (1) axial direction, are arranged on the sleeve (2) useful In the observation slot (2-5) for observing and measuring slot (1-4) and graduation mark (1-5).

7. studs screwing device according to claim 6, it is characterised in that: handwheel (2- is arranged in the sleeve (2) outside 2) it, is provided between handwheel (2-2) and sleeve (2) spoke (2-1).

8. studs screwing device according to claim 6 or 7, it is characterised in that: the rear inner wall of the stud cylinder (1) Portion is in axial direction provided with guide groove (1-2), is provided on the stop nut (6) and to be slidably matched with guide groove (1-2) Guide pad (6-2).

9. studs screwing device according to claim 8, it is characterised in that: be arranged on the outer wall of the stud cylinder (1) There is axial guiding concave surface (1-3), the guiding convex surface (2- matched with guiding concave surface (1-3) is provided on the inner wall of sleeve (2) 3), guiding concave surface (1-3) is greater than the length of guiding convex surface (2-3) along axial length.

10. studs screwing device according to claim 9, it is characterised in that: the guide groove (1-2) is provided with two A, two guide grooves (1-2) are symmetrical arranged, and the guiding concave surface (1-3) is arranged four, and four guiding concave surfaces (1-3) are along stud The circumferential surface of cylinder (1) is arranged at equal intervals.