CN209986507U

CN209986507U - Screwing device and rotor inner cavity nut screwing device

Info

Publication number: CN209986507U
Application number: CN201920352016.7U
Authority: CN
Inventors: 陈津; 陆健亮; 周烁; 杨世锡
Original assignee: China Hangfa Shanghai Aero Engine Manufacturing Co Ltd; Zhejiang University ZJU
Current assignee: China Hangfa Shanghai Aero Engine Manufacturing Co Ltd; Zhejiang University ZJU
Priority date: 2019-03-19
Filing date: 2019-03-19
Publication date: 2020-01-24
Anticipated expiration: 2029-03-19

Abstract

An object of the utility model is to provide a revolve and twist device, include: a screwing unit for outputting a screwing torque; the supporting unit comprises an installation platform, and a longitudinally extending cylindrical space is arranged on one side of the installation platform; and a traverse unit including: the transverse moving body is transversely movably arranged on the mounting platform and extends into the cylindrical space, and comprises a guide piece, and the screwing unit is transversely movably arranged on the guide piece; a longitudinal moving member provided on the traverse body and longitudinally movable with respect to the traverse body; one end of the connecting rod is hinged to the screwing unit, and the other end of the connecting rod is hinged to the longitudinal moving piece; wherein the screwing device has a contracted state, a first expanded state and a second expanded state. The utility model also provides a device is twisted soon to rotor inner chamber nut. The screwing device can be used for assembling parts which strongly limit complex space.

Description

Screwing device and rotor inner cavity nut screwing device

Technical Field

The utility model relates to a revolve and twist device, in particular to rotor inner chamber nut revolves and twists device.

Background

The rotor parts of the rotary turbo machine are generally connected by multi-stage bolts, the bolts are generally positioned in the inner cavity of the rotor, and the assembly of the bolt connection of the inner cavity is always a difficult problem in the assembly because the inlet of the inner cavity of the rotor is small, the depth is large, the structure of the inner cavity is complex, and the operating radius of the bolts between discs is far larger than that of the inlet of the inner cavity of the rotor. The inter-disc nut is one of the most typical connecting nuts in the inner cavity of the rotor, on one hand, the nut is positioned between two stages of rotor disc parts, the inter-disc space is very small and is generally about 40mm, and on the other hand, the operating radius of the nut is relatively maximum, and the assembly is most difficult. In the traditional process, a reflector and a tool are commonly used for assembling bolts between rotor inner cavity discs, the screwing efficiency is low and the screwing quality cannot be guaranteed under the condition of small operation space.

Taking nut capping and pre-tightening as an example, the traditional tool and tool are very complex in operation, the tool needs to be installed in the inner cavity of the rotor firstly, a hole detector or a reflector is adopted to assist in aligning one nut to cap, and then the whole tool is taken out to place a second nut. The whole process needs to be continuously repeated in the processes of installing the tool, optically assisting in alignment, installing the nut, taking out the tool, placing a new nut and the like, the whole process is time-consuming and labor-consuming, and the assembly efficiency is very low. In addition, the force limiting operation is blind installation of the rotor inner cavity, the collision between the tool and the rotor inner cavity needs to be avoided, extra care needs to be taken, and therefore the efficiency of nut capping and pre-tightening at the part is very low.

The present invention is directed to a screwing device that can be inserted into a complex inner cavity structure having a small inlet, such as a rotor inner cavity, to screw a fastening member, such as a nut, and to be fastened by a cap or a pre-tightening member.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a revolve and twist device is convenient for get into complicated inner chamber structure for example the rotor inner chamber revolves the nut, can be used for the part assembly in the complicated space of strong restriction.

The utility model provides a twist and twist device soon, include: a screwing unit for outputting a screwing torque; the supporting unit comprises an installation platform, and a longitudinally extending cylindrical space is arranged on one side of the installation platform; and

a traverse unit comprising: a traverse body which is transversely movably provided on the mounting platform and extends into the cylindrical space, and which includes a guide on which the screw unit is transversely movably provided; a traverse member provided on the traverse body and longitudinally movable with respect to the traverse body; one end of the connecting rod is hinged to the screwing unit, and the other end of the connecting rod is hinged to the longitudinal moving piece; wherein the screwing device has a contracted state in which the screwing unit is located in the cylindrical space, a first expanded state, and a second expanded state; in the first expanded state, the screw unit projects toward the outside of the cylindrical space by the traverse body moving laterally on the mounting platform; in the second stretching state, the screwing unit is driven by the connecting rod through the longitudinal movement of the longitudinal moving piece to stretch towards the outer side of the cylindrical space.

In one embodiment, the screwing device further includes a screw driving unit and a screw transmission mechanism provided on the traverse body, the screw driving unit being driven by the screw driving unit through the screw transmission mechanism to output a screw torque; the screwing transmission mechanism comprises: a plurality of shafts extending along the transverse direction, the plurality of shafts being sleeved and splined two by two, being slidable relative to each other so that the plurality of shafts are configured as a telescopic drive shaft.

In one embodiment, the screw drive unit has a screw output shaft which outputs a rotational movement, the screw output shaft extending longitudinally; the screwing transmission mechanism further comprises a driving bevel gear and a driven bevel gear which are matched with each other and are arranged vertically to each other, and the driving bevel gear is connected with the screwing output shaft; one of the head and tail shafts of the multiple spline shafts is connected with the driven bevel gear, and the other shaft of the head and tail shafts is used for outputting torque to the screwing unit.

In one embodiment, the screw unit includes: a torque output unit; an input driving gear and an input driven gear which are matched with each other, wherein the input driving gear is used for receiving input torque to rotate, and the central axis of the input driving gear is parallel to the transverse direction; the input end driven gear is connected with the worm; and the output driving gear is connected with the worm wheel, and the output driven gear is connected with the torque output unit.

In one embodiment, the support unit further comprises a longitudinal sleeve having a peripheral wall with an opening, the cylindrical space being defined by the peripheral wall of the longitudinal sleeve, the screw unit being movable inside and outside the cylindrical space through the opening.

In one embodiment, an end of the longitudinal sleeve remote from the mounting platform is provided with a guide table on which the guide is slidably arranged.

In one embodiment, the traverse unit is driven to move laterally by a traverse driving unit installed at the other side of the mounting platform.

In one embodiment, the traverse unit further comprises a sliding base, the traverse body is connected to the sliding base, and the mounting platform is provided with a sliding rail matched with the sliding base; the screwing device further comprises a transverse moving transmission mechanism, and the transverse moving transmission mechanism comprises a transverse moving rack arranged along the transverse direction and a transverse moving gear meshed with the transverse moving rack; the transverse moving driving unit is provided with a transverse moving output shaft for outputting rotary motion, and the transverse moving output shaft is connected with the transverse moving gear; the transverse moving unit further comprises a longitudinal moving driving source which drives the longitudinal moving piece to move longitudinally; the screwing device further comprises a longitudinal moving transmission mechanism, and the longitudinal moving transmission mechanism comprises a longitudinal moving rack and a longitudinal moving gear, wherein the longitudinal moving rack is arranged along the longitudinal direction, and the longitudinal moving gear is meshed with the longitudinal moving rack; the longitudinal movement driving source is provided with a longitudinal movement output shaft for outputting rotary motion, and the longitudinal movement output shaft is connected with the longitudinal movement gear.

In one embodiment, the traverse body of the traverse unit further comprises a longitudinally extending hollow cylinder, the guide and the hollow cylinder being in an L-shaped configuration; the longitudinal moving piece is a longitudinally extending shaft-shaped piece and is arranged in the hollow interior of the hollow cylinder piece.

In one embodiment, the mounting platform includes a rotating member rotatably disposed on the platform body and a platform body disposed on the rotating member.

In one embodiment, the screwing device further comprises an upper cartridge, the mounting platform being provided with a hole through which the upper cartridge passes; the torque output unit of the screwing unit is a screwing sleeve, and the upper charging barrel is provided with a built-in fastener and can move in and out of the cylindrical space to be butted with or separated from the screwing sleeve.

The utility model also provides a device is twisted soon to rotor inner chamber nut, twist soon the device including the aforesaid, the mounting platform who twists the device soon is fixed in the inner chamber entrance of rotor, twist soon the central channel that the unit put into the rotor inner chamber.

The screwing device can enter from a small inlet by using the design of a delicate mechanical structure, avoids the structural limitation of a complex inner cavity such as a rotor inner cavity, and is expanded in a narrow space between the complex inner cavity such as rotor disks to realize blind assembly with a large operating radius.

The screwing device can also realize primary expansion and secondary expansion, and is favorable for realizing coarse adjustment and fine adjustment of the transverse position of the screwing unit.

In the screwing device, the fasteners such as the nuts can be continuously fed, so that the whole tool can be prevented from being taken out and a new fastener can be placed; the power transmission path can be reduced by screwing the power source internally, and the reliability and the service life of the whole device are improved.

The automatic control of the operation process can be realized by the screwing device, the screwing device comprises a mechanism, a nut feeding device, a nut automatic positioning device, a sequential screwing device and the like, so that the current situations that the installation of the nut between the disks of the traditional high-pressure compressor is complicated, time and labor are wasted can be changed, and the automatic pre-tightening of the nut between the disks in the cavity of the high-pressure compressor of an aeroengine can be realized.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:

fig. 1 is a schematic structural view of the rotor cavity.

Fig. 2 is a perspective view of the screwing device.

Fig. 3 is a sectional view of the screwing device.

Fig. 4 is a partial sectional view showing the screwing device in a contracted state.

Fig. 5 is a partial sectional view showing the screwing device in a deployed state.

Fig. 6 is a partially enlarged view showing the screw device in a developed state.

Fig. 7 is a structural view showing the inside of the screw unit taken along line a-a in fig. 6.

Fig. 8 is a perspective view of the screwing device when the feeding pipe is withdrawn.

Detailed Description

The present invention will be further described with reference to the following detailed description and the accompanying drawings, wherein the following description sets forth more details for the purpose of providing a thorough understanding of the present invention, but it is obvious that the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations and deductions based on the practical application without departing from the spirit of the present invention, and therefore, the scope of the present invention should not be limited by the contents of the detailed description.

For example, a first feature described later in the specification may be formed over or on a second feature, and may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features may be formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated in the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.

As used herein, the terms "a", "an" and/or "the" are not to be construed as limiting the singular, but rather are intended to include the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.

For convenience in description, spatial relational terms such as "below," "beneath," "below," "under," "over," "upper," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that these terms of spatial relationship are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary words "below" and "beneath" can encompass both an orientation of up and down. The device may have other orientations (rotated 90 degrees or at other orientations) and the spatial relationship descriptors used herein should be interpreted accordingly. Further, it will also be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.

It should be noted that these and other figures are given by way of example only and are not drawn to scale, and should not be construed as limiting the scope of the invention as it is actually claimed. Further, the conversion methods in the different embodiments may be appropriately combined.

Fig. 1 exemplarily shows an inner cavity structure of the rotor 200. The rotor disks in the rotor cavity are often connected by an inter-disk nut at a position a, and when the inter-disk nut is screwed, such as capped and pre-tightened, a screwing device needs to enter a central passage of the rotor cavity from a small inlet B, and the operating radius at the position a is larger than that of the small inlet B. Thus, the present invention contemplates a screw-on device 100 that can be accessed from the small entrance B and then extended to reach the desired operating radius when reaching the height of position a. In the illustrated embodiment, the screwing device 100 is used for screwing nuts into the rotor cavity, and in another embodiment, the screwing device 100 can also be used for screwing fasteners into other complex cavity-like structures.

Referring to fig. 2 and 3, the screwing device 100 includes a screwing unit 1, a supporting unit 2, and a traverse unit 3 (see fig. 3).

Referring to fig. 3, the screw unit 1 is used to output a screw torque. The screwing unit 1 includes a torque output unit 11. In the illustrated embodiment, the torque output unit 11 is a screw sleeve configured to receive a fastener such as a nut therein and to be rotated by a screw driving action to screw the fastener. That is, under the corresponding screwing driving action, the screwing sleeve as the torque output unit 11 can rotate and bring the fastening member to rotate together, thereby realizing the screwing action, for example, when the fastening member is a nut, the nut can be capped or pre-tightened or force limited, and when the fastening member is a bolt, the bolt can be screwed. As will be described later, the screw unit 1 can be moved or telescoped back and forth in the transverse direction D1, and the screw device 100 is switched between the retracted state and the extended state as the screw unit 1 is moved back and forth transversely.

Fig. 7 shows an example structure of the inside of the screw unit 1. For example, the screwing unit 1 may comprise an input driving gear 12 and an input driven gear 13 cooperating with each other, a worm 14 and a worm wheel 15 cooperating with each other, and an output driving gear 16 and an output driven gear 17 cooperating with each other. Wherein the input driving gear 12 is used for receiving input torque to rotate, the central axis of the input driving gear 12 is parallel to the transverse direction D1, the input driven gear 13 is connected with the worm 14, the output driving gear 16 is connected with the worm wheel 15, and the output driven gear 17 is connected with the torque output unit 11 (not shown in fig. 7). When the input driving gear 12 receives input power and rotates, the input driving gear 13 matched with the input driving gear is driven to rotate, the worm 14 connected with the input driving gear 13 also rotates, then the worm gear 15 matched with the worm 14 rotates, the output driving gear 16 connected with the worm gear 15 also rotates together, and finally the output driving gear 17 and the torque output unit 11 connected with the output driving gear 17 are driven to rotate. The arrangement can realize speed reduction and torque increase, for example, when the power source is a small motor, the function of large torque output can be realized. In another embodiment, the screwing unit 1 may include a plurality of gears engaged with each other, wherein the input driving gear receives external power to rotate, and then drives the output driven gear to rotate, so as to drive the torque output unit 11 to rotate.

Referring to fig. 3 and 5, the supporting unit 2 includes a mounting platform 24, and a cylindrical space S extending in a longitudinal direction D2 is provided at one side (lower side in fig. 3) of the mounting platform 24. As described above, the screw device 100 is switched between the contracted state and the expanded state as the screw unit 1 is laterally moved back and forth. Fig. 4 shows the screwing device 100 in a contracted state, with the screwing unit 1 in the cylindrical space S. Fig. 5 shows the screw device 100 in an extended state, in which the screw unit 1 is extended toward the outside of the cylindrical space S.

Referring to fig. 3, the traverse unit 3 is transversely movably provided on the mounting platform 24 and extends into the cylindrical space S of the support unit 2, and the traverse unit 3 includes a traverse body 31, a longitudinal movement member 4, and a link 5. Referring to fig. 2, the screwing device 100 includes a traverse driving unit 30, and the traverse unit 3 is driven to move laterally by the traverse driving unit 30. The traverse unit 3 further comprises a slide 32, to which the traverse body 31 is connected (see fig. 3), and on the mounting platform 24 a slide rail 320 is provided which cooperates with the slide 32, two slide rails 320 being shown in fig. 2 arranged parallel in the transverse direction D1. The screwing device 100 further includes a traverse transmission mechanism including a traverse rack 3a disposed in the transverse direction D1 and a traverse gear 301 engaged with the traverse rack 3 a. The traverse driving unit 30 has a traverse output shaft that outputs a rotational motion, and the traverse output shaft is connected to a traverse gear 301. Therefore, when the traverse output shaft of the traverse driving unit 30 rotates, the traverse gear 301 rotates, and the traverse unit 3 provided with the traverse rack 3a is moved in the traverse direction D1.

The traverse body 31 includes a guide 311, and the screw unit 1 is laterally movably provided on the guide 311, or alternatively, the guide 311 may guide the screw unit 1 to move in the lateral direction D1. In the embodiment shown in fig. 3, the bottom of the screw unit 1 is provided with a slider 111, the screw unit 1 is connected to the guide 311 by the slider 111 cooperating with the guide 311, and the screw unit 1 is slidable in the transverse direction D1 relative to the guide 311 by the slider 111. For example, the guide 311 may have a guide groove extending in the lateral direction D1, and the slider 111 is a guide block that can be inserted into the guide groove so as to slide in the lateral direction D1.

The longitudinally moving member 4 is provided on the traverse body 31 to be movable in the longitudinal direction D2 with respect to the traverse body 31. One end (upper end in fig. 3) of the connecting rod 5 is hinged to the screwing unit 1, and the other end (lower end in fig. 3) is hinged to the longitudinal movement member 4. In the figure, a hinge pressing piece 41 is provided at a lower portion of the vertically moving member 4, and the one end of the link 5 is hinged by the hinge pressing piece 41. Referring to fig. 2 and 3, the screwing device 100 includes a longitudinal movement driving source 40, and the longitudinal movement driving source 40 drives the longitudinal movement member 4 to move longitudinally. Similarly to the traverse driving action of the traverse unit 3, the screwing device 100 includes a longitudinal movement transmission mechanism including a longitudinal movement rack 4a provided in the longitudinal direction D2 and a longitudinal movement gear 401 engaged with the longitudinal movement rack 4 a. The vertical movement driving source 40 has a vertical movement output shaft that outputs a rotational movement, and the vertical movement output shaft is connected to a vertical movement gear 401. Therefore, when the vertical movement output shaft of the vertical movement driving source 40 rotates, the vertical movement gear 401 rotates, and the vertical movement member 4 provided with the vertical movement rack 4a is moved in the vertical direction D2.

In the embodiment shown in fig. 3, the traverse body 31 of the traverse unit 3 includes a hollow cylindrical member 31a extending longitudinally, and the guide member 311 and the hollow cylindrical member 31a are in an L-shaped configuration. The longitudinal moving member 4 is a longitudinally extending shaft-like member disposed in the hollow interior of the hollow cylindrical member 31a, which saves space, and the inner peripheral wall of the hollow cylindrical member 31a provides a guiding function for the longitudinal movement of the longitudinal moving member 4.

According to the above description, under the traverse driving action, the traverse unit 3 and the screw unit 1 are integrally moved in the transverse direction D1, and one-stage expansion and contraction of the screw unit 1 in the transverse direction D1, including one-stage expansion and one-stage contraction, is realized. Under the action of the longitudinal movement driving, the longitudinal movement piece 4 moves along the longitudinal direction D2 relative to the traverse main body 31, and further moves along the transverse direction D1 under the guiding action of the guide piece 311 of the traverse main body 31 by the hinging action of the connecting rod 5, so as to realize the secondary expansion and contraction of the screw unit 1 on the transverse direction D1, including secondary expansion and secondary contraction. That is, the screwing device 100 has two extended states, and in connection with the above description, the screwing device 100 has a contracted state, a first extended state, and a second extended state. In the contracted state, the screw unit 1 is located in the cylindrical space S. In the first expanded state, corresponding to the first-stage expansion, the screw unit 1 is expanded toward the outside of the cylindrical space S by being laterally moved on the mounting platform 24 by means of the traverse body 31; in the second extended state, corresponding to the second extension, the screwing unit 1 is extended towards the outside of the cylindrical space S by means of the longitudinal movement member 4, carried by the connecting rod 5. The two-stage telescopic function can realize coarse adjustment and fine adjustment of the position of the screw unit 1 on the transverse direction D1, and the adjustment is convenient.

Referring to fig. 3, the screwing device 100 includes a screw driving unit 10 and a screw transmission mechanism 101, and the screw unit 1 or the torque output unit 11 is driven by the screw driving unit 10 through the screw transmission mechanism 101 to output a screw torque. In the drawing, the screw driving unit 10 and the screw transmission mechanism 101 are provided on the traverse unit 3, that is, the screw driving unit 10 and the screw transmission mechanism 101 are extended and contracted with one-stage extension and contraction of the traverse unit 3 and the screw unit 1.

The screw drive 101 comprises a plurality of shafts (shown more clearly in fig. 5), for example three

shafts

104, 105, 106, extending in a transverse direction D1. The plurality of

shafts

104, 105, 106 are sleeved and splined in pairs and are slidable relative to each other such that the plurality of

shafts

104, 105, 106 are configured as telescoping drive shafts. In the illustrated embodiment, the shaft 104 is a shaft-like member having external splines extending in the transverse direction D1, the shaft 106 is a barrel-like member having internal splines extending in the transverse direction D1, the shaft 105 is a barrel-like member having internal and external splines extending in the transverse direction D1, the shaft 105 is fitted over the shaft 104, and the shaft 106 is fitted over the shaft 105 and is slidable relative to each other in the transverse direction D1 but non-rotatable in the circumferential direction.

Referring to fig. 3, the screw drive unit 10 has a screw output shaft 109 which outputs a rotational movement, the screw output shaft 109 extending in a longitudinal direction D2. The screw transmission 101 further includes a drive bevel gear 102 and a driven bevel gear 103 that are engaged with each other and arranged perpendicular to each other, wherein the drive bevel gear 102 is connected to a screw output shaft 109 of the screw drive unit 10. One shaft 104 of the first and last two

shafts

104, 106 of the plurality of

shafts

104, 105, 106 is connected to the driven bevel gear 103, and the other shaft 106 of the first and last two

shafts

104, 106 is used to output torque to the screw unit 1. Specifically, the shaft 106 may be connected to the input driving gear 12 inside the screw unit 1 described above to output torque to the screw unit 1. The screw driving unit 10 drives the driving bevel gear 102 to rotate, which drives the driven bevel gear 103 and the shaft 104 connected thereto to rotate around the rotation axis parallel to the transverse direction D1, so that the rotation torque is transmitted to the input driving gear 12 inside the screw unit 1 by the transmission of the

shafts

105 and 106, which drives the screw sleeve as the torque output unit 11 to rotate for screwing. Moreover, when screw unit 1 is secondarily extended and contracted in transverse direction D1 by the hinge action of link 5 due to the longitudinal movement of longitudinal moving member 4,

shafts

104, 105, 106 slide relative to each other to allow secondary extension and contraction of screw unit 1.

Referring to fig. 2, the mounting platform 24 of the support unit 2 includes a rotation member 23 and a platform main body 241, the rotation member 23 is rotatably provided on the platform main body 241, and the traverse unit 3 is provided on the rotation member 23 so that the traverse unit 3 can be rotated in synchronization with the rotation member 23. In the illustrated embodiment, the rotating member 23 is rotated about the central axis parallel to the longitudinal direction D2 by the rotational driving, and the traverse unit 3 can rotate about the central axis parallel to the longitudinal direction D2 with the screw unit 1 following the rotating member 23. In the illustrated embodiment, the rotation member 23 is a large gear, and the screwing device 100 includes a rotation driving unit 230, the rotation driving unit 230 driving a small gear 231 to rotate, the small gear 231 being engaged with the large gear as the rotation member 23, so that the rotation member 23 rotates. With the above arrangement, it is possible to precisely control the orientation of the screw unit 1 so that the torque output unit 11 is aligned with a position where a fastener needs to be screwed when the screw unit 1 is extended, and to rotate the screw unit 1 to a fastener corresponding to a different position.

Referring to fig. 2, the support unit 2 may further include a longitudinal sleeve 21 having an opening 21a in a peripheral wall thereof, the cylindrical space S being defined by the peripheral wall of the longitudinal sleeve 21, and the screw unit 2 being movable inside and outside the cylindrical space S through the opening 21 a. The outer diameter of the longitudinal sleeve 21 defines the minimum inner diameter of the passage that can be accessed by the screwing device 100, which for the rotor cavity shown in fig. 1 is the inner diameter at the small inlet B. The rotating member 23 can be connected to the longitudinal sleeve 21 to rotate the longitudinal sleeve 21. In the illustrated embodiment, the longitudinal sleeve 21 extends from one side (the lower side in fig. 2) of the mounting platform 24. The traverse driving unit 30, the traverse driving source 40, the rotation driving unit 230, and the like described above may be installed at the other side (upper side in fig. 2) of the mounting platform 24. When the screwing device 100 is used for the rotor bore nut screwing, the support unit 2 of the screwing device 100 may be fixed to the rotor 200, with the screwing unit 1 protruding into the rotor bore. In the illustrated embodiment, the mounting platform 24 of the screwing device 100 may be fixed at an entrance of an inner cavity of the rotor (e.g., a small entrance B in fig. 1), the longitudinal sleeve 21 with the screwing unit 1 and the like is placed in a central passage of the inner cavity of the rotor, and the traverse driving unit 30, the traverse driving source 40, the rotation driving unit 230 and the like described above are located outside the inner cavity of the rotor.

In the embodiment shown in fig. 3, the end (lower end in fig. 3) of the longitudinal sleeve 21 remote from the mounting platform 24 is further provided with a guide table 22, and the guide piece 311 is slidably arranged on the guide table 22. The guide table 22 may guide the traverse unit 3 to move in the transverse direction D1 by the guide member 311. In the illustrated embodiment, the slider 319 is provided at the bottom of the guide piece 311 of the traverse body 31, and the traverse body 31 is guided to move in the transverse direction D1 by the engagement between the slider 319 and the guide table 22.

Referring to fig. 2, 3 and 8, the screwing device 100 also comprises an upper cartridge 6. The upper barrel 6 is provided to be able to receive a nut and to advance and retreat into and from the cylindrical space S to and from a torque output unit 11 of the screw unit 1, and in the figure, the torque output unit 11 is a screw sleeve. As also shown in fig. 2, the mounting platform 24 is provided with holes through which the upper cartridge 6 passes. In fig. 2, the cartridge mounting plate 60 of the mounting platform 24 is provided with a hole through which the upper cartridge 6 passes. Fig. 3 shows a state where the upper barrel 6 is extended into the cylindrical space S and butted against the torque output unit 11 of the screw unit 1, at this time, by inserting a nut into the upper port of the upper barrel 6, the nut is dropped into a screw sleeve as the torque output unit 11 by the guide of the upper barrel 6, and then, capping or force limiting operation or the like can be performed. Fig. 8 shows a state where the upper cartridge 6 is withdrawn from the cylindrical space S and away from the torque output unit 11, and after the fastener is transmitted to the torque output unit 11, the upper cartridge 6 is lifted up to be withdrawn from the cylindrical space S so as not to interfere with the lateral movement of the screw unit 1.

In the illustrated embodiment, the traverse driving unit 30, the traverse driving source 40, the rotation driving unit 230, the screw driving unit 10, and the like are all motors, which may be other driving devices.

Taking the screwing of the nut in the inner cavity of the rotor as an example, the operation of the screwing device 100 is described below.

The screwing device 100 is fixedly supported at the entrance of the rotor cavity by a support unit 2, for example a mounting platform 24, the longitudinal sleeve 21 of the support unit 2 being placed in the rotor cavity;

turning on the rotation driving unit 230, performing zero-scale calibration such that the torque output unit 11 or the opening 21a of the screw unit 1 is aligned with a bolt that requires, for example, a cap;

the nut is loaded by abutting the loading barrel 6 to the torque output unit 11, substantially in the state shown in fig. 3. The upper cartridge 6 is then withdrawn, generally as in the state of fig. 4 or 8;

driving the traverse driving unit 30 to slide by the slide carriage 32 matching with the slide rail 320 on the mounting platform 24, so as to drive the traverse unit 3 and the screwing unit 1 to move outwards together along the transverse direction D1, thereby completing the primary stretching;

then, the longitudinal movement driving unit 40 is started to drive the longitudinal movement member 4 to move towards the lower side of fig. 3 along the longitudinal direction D2, so that under the pushing action of the connecting rod 5, the screwing unit 1 further moves outwards along the transverse direction D1 to complete the secondary extension, which is substantially in the state shown in fig. 5, and at this time, the torque output unit 11 is aligned with the bolt;

the screwing driving unit 10 is driven to apply torque through a screwing transmission mechanism 101 (see fig. 3) and a transmission mechanism inside the screwing unit 1, and the capping operation is completed;

after the capping operation is completed, the traverse driving unit 30 can be driven reversely, the slide carriage 32 is matched with the slide rail 320 on the mounting platform 24 to slide reversely, so that the traverse unit 3 and the screwing unit 1 are driven to move inwards along the transverse direction D1 together, primary contraction is realized, namely, the screwing unit 1 moves back along the transverse direction D1 under the control of the traverse driving unit 30, and then the longitudinal driving unit 40 is controlled to further slide back along the transverse direction D1, so that secondary contraction is realized;

then, and the rotation driving unit 230 is controlled to precisely adjust the scale lines, and the torque output unit 11 or the opening 21a is aligned with the bolts one by one and is charged and capped until all the bolts are capped.

The screwing device 100 mainly adopts high-precision mechanical control to realize screwing operations of automatic feeding, capping, pre-tightening and the like of a fastener. The screwing device 100 can realize the delivery of the fastener to the deep part of the inner cavity and the automatic screwing by the translation structure and the transmission mechanism which are unfolded and operated at the position with the large diameter of the inner cavity in a narrow operable space, thereby overcoming the limitation of the narrow space. Moreover, a set of continuous feeding mechanism is designed in the screwing device 100, so that the tool main body is prevented from being lifted and lowered for many times; wherein the screwing drive unit is built in the cylindrical space, reducing the transmission path and increasing the reliability of the device. Each driving unit forms an automatic control power set, and the automation of the whole screwing process is realized through the accurate control of each degree of freedom.

When the screwing device 100 is applied to screwing of the nut in the inner cavity of the rotor, the assembly quality of the rotor assembly can be improved, compared with manual assembly, the screwing device can improve the accuracy of threaded connection torque control and the consistency of repeated assembly, the working efficiency of threaded connection assembly in the inner cavity of the rotor is greatly improved, the working intensity of operators is greatly reduced, the operators do not need to operate blindly in a strong limited space, and the complex and heavy manual labor in the past can be completed only by simple system operation.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can understand the changes or substitutions within the technical scope of the present invention, and the present invention should be covered within the protection scope of the present invention.

Claims

1. A screwing device, characterized by comprising:

a screwing unit for outputting a screwing torque;

the supporting unit comprises an installation platform, and a longitudinally extending cylindrical space is arranged on one side of the installation platform; and

a traverse unit comprising:

a traverse body which is transversely movably provided on the mounting platform and extends into the cylindrical space, and which includes a guide on which the screw unit is transversely movably provided;

a traverse member provided on the traverse body and longitudinally movable with respect to the traverse body; and

one end of the connecting rod is hinged to the screwing unit, and the other end of the connecting rod is hinged to the longitudinal moving piece;

wherein the screwing device has a contracted state in which the screwing unit is located in the cylindrical space, a first expanded state, and a second expanded state; in the first expanded state, the screw unit projects toward the outside of the cylindrical space by the traverse body moving laterally on the mounting platform; in the second stretching state, the screwing unit is driven by the connecting rod through the longitudinal movement of the longitudinal moving piece to stretch towards the outer side of the cylindrical space.

2. The screwing device according to claim 1, further comprising a screw driving unit and a screw transmission mechanism, the screw driving unit and the screw transmission mechanism being provided on the traverse body, the screw driving unit being driven by the screw driving unit through the screw transmission mechanism to output a screw torque;

the screwing transmission mechanism comprises:

a plurality of shafts extending along the transverse direction, the plurality of shafts being sleeved and splined two by two, being slidable relative to each other so that the plurality of shafts are configured as a telescopic drive shaft.

3. The screwing device according to claim 2,

the screw driving unit has a screw output shaft outputting a rotational movement, the screw output shaft extending longitudinally;

the screwing transmission mechanism further comprises a driving bevel gear and a driven bevel gear which are matched with each other and are arranged vertically to each other, and the driving bevel gear is connected with the screwing output shaft;

one of the first and second shafts of the plurality of shafts is connected to the driven bevel gear, and the other of the first and second shafts is used to output torque to the screw unit.

4. The screwing device according to one of claims 1 to 3, characterized in that said screwing unit comprises:

a torque output unit;

an input driving gear and an input driven gear which are matched with each other, wherein the input driving gear is used for receiving input torque to rotate, and the central axis of the input driving gear is parallel to the transverse direction;

the input end driven gear is connected with the worm; and

the output driving gear is connected with the worm wheel, and the output driven gear is connected with the torque output unit.

5. The screwing device according to claim 1, wherein the support unit further includes a longitudinal sleeve having an opening in a peripheral wall thereof, the cylindrical space being defined by the peripheral wall of the longitudinal sleeve, the screwing unit being movable inside and outside the cylindrical space through the opening.

6. The screwing apparatus of claim 5, wherein an end of the longitudinal sleeve remote from the mounting platform is provided with a guide table on which the guide member is slidably disposed.

7. The screwing apparatus of claim 1, wherein the traverse unit is driven to move laterally by a traverse driving unit installed at the other side of the mounting platform.

8. The screwing device according to claim 7,

the transverse moving unit further comprises a sliding seat, the transverse moving main body is connected to the sliding seat, and a sliding rail matched with the sliding seat is arranged on the mounting platform;

the screwing device further comprises a transverse moving transmission mechanism, and the transverse moving transmission mechanism comprises a transverse moving rack arranged along the transverse direction and a transverse moving gear meshed with the transverse moving rack;

the transverse moving driving unit is provided with a transverse moving output shaft for outputting rotary motion, and the transverse moving output shaft is connected with the transverse moving gear;

the transverse moving unit further comprises a longitudinal moving driving source which drives the longitudinal moving piece to move longitudinally;

the screwing device further comprises a longitudinal moving transmission mechanism, and the longitudinal moving transmission mechanism comprises a longitudinal moving rack and a longitudinal moving gear, wherein the longitudinal moving rack is arranged along the longitudinal direction, and the longitudinal moving gear is meshed with the longitudinal moving rack;

the longitudinal movement driving source is provided with a longitudinal movement output shaft for outputting rotary motion, and the longitudinal movement output shaft is connected with the longitudinal movement gear.

9. The screwing device according to claim 1,

the traverse body of the traverse unit further includes a hollow cylinder extending longitudinally, the guide and the hollow cylinder being in an L-shaped configuration;

the longitudinal moving piece is a longitudinally extending shaft-shaped piece and is arranged in the hollow interior of the hollow cylinder piece.

10. The screwing apparatus of claim 1, wherein the mounting platform includes a rotatable member rotatably disposed on the platform body and a platform body disposed on the rotatable member.

11. The screwing device according to claim 1, further comprising an upper barrel, the mounting platform being provided with a hole through which the upper barrel passes; the torque output unit of the screwing unit is a screwing sleeve, and the upper charging barrel is provided with a built-in fastener and can move in and out of the cylindrical space to be butted with or separated from the screwing sleeve.

12. A rotor cavity nut screwing device, comprising the screwing device according to any one of claims 1 to 11, wherein the mounting platform of the screwing device is fixed at the cavity entrance of the rotor, and the screwing unit is inserted into the central passage of the rotor cavity.