CN207036252U - Flexible arm space oscillations specificity analysis device based on polyphaser - Google Patents

Abstract

The utility model discloses the flexible arm space oscillations specificity analysis device based on polyphaser, the support system part of two-freedom large arm telecontrol equipment part including Dual-Servo Motor driving, experiment pedestal and sliding block tripod platform composition, and the polyphaser space measurement analysis system part being made up of three cameras；Two-freedom large arm telecontrol equipment part is fixedly mounted on experiment pedestal, and polyphaser space measurement analysis system is partially installed on sliding block tripod platform.The utility model application polyphaser space measurement analysis system measures the locus of index point in two-freedom large arm under moving condition, analyze the landmark space positional information of gained, draw two-freedom large arm information of flexural vibrations and twisting vibration in solid space, so as to realize the Active Vibration Control to two-freedom large arm, simulated experiment basis is established to realize space station to the space active control of multivariant space mechanical arm.

Description

Flexible arm space oscillations specificity analysis device based on polyphaser

Technical field

Positioning and the vibration control technology field of flexible structure are the utility model is related to, more particularly to one kind is based on polyphaser Flexible arm space oscillations specificity analysis device.

Background technology

As the fast development of current space flight and aviation cause, the mankind are more and more fast to the efficiency requirements of space space exploration Maintenance and space station staff food supply of the quick conveying of speed, wherein space goods and materials on spacecraft influence huge, boat After its aircraft reaches object space station nearby, because of the factor of space environment, the docking of space shuttle and space station is very difficult, this The efficiency that sample causes goods and materials conveying is very limited, and foolproof mating operation becomes very difficult originally, in some instances it may even be possible to leads Cause goods and materials conveying is serious to delay.And space mechanical arm successfully research and develop and come into operation, almost fundamentally solve space station Goods and materials convey the problem of mating operation.Meanwhile space mechanical arm conveys mating operation except that can be rapidly completed space station goods and materials, It can also realize and the space trash for swimming in neighbouring space is effectively cleared up.

Space mechanical arm is the Intelligent robot for having split-hair operability and flexibility, is precision optical machinery, space The high-end space equipment that the multi-door subject such as dynamics, accurate miniature electronics and control organically combines.The success of space mechanical arm should With and its correlation technique rapid development, space mechanical arm has become the important bridge between space shuttle and space station, Space shuttle and the development of international space station part important technology and space science research are promoted, expands the mankind in space Activity scale and scope.

Such space mechanical arm equipped with various visual angles visual identifying system and its feedback active control, it is and all kinds of sensitive The signal detection of sensor and its feedback active control so that space mechanical arm has autonomous analysis well and autonomous control Ability, while can artificially be manipulated by space station staff, realizes accurate docking and satellite, large-scale too is discarded in space The cleaning of empty rubbish etc..

For space mechanical arm at present mainly using length up to more than ten meters of high-strength alloy tubing, possessing has multiple frees degree (generally 6 frees degree).In the application process of international space station, because the ratio of pipe length and its diameter is larger and free Degree is high, and the flexural vibrations of space mechanical arm and twisting vibration situation certainly exist tremendous influence to its accurate remote control, therefore right Its effective control vibrated be determine space mechanical arm can normal use in the key point of international space station, it is bent and shaken Dynamic and twisting vibration measurement precise degrees are the basis for drawing accurate vibration control information again.

And multi-camera measurement system can be using the high frame per second of high-speed industrial camera, extremely short time for exposure, contactless survey The experimental simulation situation of the features such as amount, exactly real-time dynamically recording space mechanical arm, and then recorded by computer disposal Photo simultaneously analyzes the accurate vibration information for drawing each calibration point, so as to realize the accurate active control to space mechanical arm, together Shi Weigeng high-freedom degree space mechanical arms can be successfully applied to space environment and provide theoretical and experiment basis.

Utility model content

In order to overcome shortcoming and deficiency existing for prior art, the utility model provides a kind of flexible arm based on polyphaser Space oscillations specificity analysis device, the progressive scan sensor and global shutter of high-speed industrial camera are applied, in very short time Interior the advantages of can clearly recording information in what comes into a driver's, realize the curvature of space vibration to two-freedom flexible arm and twisting vibration letter Breath carries out real-time dynamically recording, is more high-freedom degree flexible arm to analyze the Vibration Condition of flexible arm in space exactly Vibration analysis provide with reference to basis.

In order to solve the above technical problems, the utility model provides following technical scheme：A kind of flexible arm based on polyphaser Space oscillations specificity analysis device, including experiment pedestal, reductor support base, AC servo motor I, reductor I, I-shaped extension Arm, flexible large arm I, deceleration machine support, AC servo motor II, reductor II and flexible large arm II；

The reductor support base is fixed on the experiment pedestal, and the AC servo motor I is fixed on reductor branch Support on seat；

The reductor I is fixedly connected with the drive shaft of AC servo motor I, and the flexible large arm I passes through the I-shaped Adjutage is fixedly connected with reductor I, and AC servo motor I drives reductor I by axle, so as to drive flexible large arm I；

The reductor II is fixedly connected with the flexible large arm I, the AC servo motor by the deceleration machine support II is fixedly connected with reductor II, and the flexible large arm II is fixedly connected with reductor II, and the axle of AC servo motor II driving subtracts Fast machine II, so as to drive flexible large arm II to rotate.

Further, the flexible arm space oscillations specificity analysis device based on polyphaser also includes camera fixation branch Frame, adjustable seats I, adjustable seats II, camera fast-assembling platform, camera assembly I, depth camera assembly II and plane camera assembly；

Wherein, on one end fixed camera fixed support of adjustable seats I, the fixedly adjustable bearing II of the other end, camera fast-assembling platform Middle part is fixed on the junction between adjustable seats I and adjustable seats II, and camera assembly I and depth camera assembly II are set respectively In camera fast-assembling platform both ends, plane camera assembly is arranged at the top of adjustable seats II；

The camera fixing support is fixedly mounted on by experiment pedestal, and camera assembly I, depth camera assembly II and plane The camera lens face experiment pedestal of camera assembly.

Further, the flexible arm space oscillations specificity analysis device based on polyphaser also includes industrial computer And encoder；

The encoder is integrated in the AC servo motor I and AC servo motor II, for detecting AC servo electricity The angle position signal of machine I and AC servo motor II, and sent after the encoded device of angle position signal is resolved into card to work Industry computer；

The industrial computer connection encoder and 3 depth camera assemblies, for receiving the transmission of depth camera assembly Photographic intelligence is simultaneously analyzed and processed, and for receiving the information and processing information of encoder transmission.

Further, the camera fixing support uses tripod, and the tripod includes 3 rail assemblies, 3 sliding blocks Assembly, 3 adjustable foot duct members and camera system head；Rail assembly is fixedly connected with adjustable foot tube by sliding block assembly respectively The bottom of part, the equal fixed camera system head in top of 3 adjustable foot duct members, the fixedly adjustable bearing I of camera system head.

Further, the adjustable foot duct member includes 2 ball connecting rods, foot tube inner shaft lever, foot tube locking knob, foot tube Outer shaft and 2 foot tube side end caps；Each adjustable foot duct member can change it by adjusting the foot tube locking knob Total length, and its target length is fixed by tightening foot tube locking knob, different adjustable foot duct member length combinations, realize phase The different angle demand of machine system head；Ball connecting rod and foot tube interior axle boom end, foot tube outer shaft end and foot tube side simultaneously All it is to use mating spherical surfaces between end cap, for strengthening the degree of flexibility of sliding block tripod platform system.

Further, the adjustable seats I include fast-assembling flange, bearing shaft core I, bearing locking knob I, bearing axle sleeve I And bearing flange I, fast-assembling flange hold-down support shaft core I, the hold-down support axle sleeve I of bearing flange I；The spiral of bearing shaft core I is fixed Bearing axle sleeve I, and pass through the height of the regulation bearing of bearing locking knob I shaft core I.

Further, the adjustable seats II include Quick-mounting board, bearing shaft core II, bearing locking knob II, bearing axle sleeve II and bearing flange II, Quick-mounting board hold-down support shaft core II, the hold-down support shaft sleeve II of bearing flange II；The spiral of bearing shaft core II is consolidated Determine bearing shaft sleeve II, and the height of bearing shaft core II is adjusted by bearing locking knob II.

After adopting the above technical scheme, the utility model at least has the advantages that：

(1) the low backhaul gap flange output speed reducer used has very low backhaul gap, high intensity and compact-sized short The characteristics of small, can avoid because the backhaul gap of reductor is excessive or drive part caused by moment of torsion it is excessive, to two-freedom The flexural vibrations and twisting vibration of flexible arm produce the additional influence that can not ignore；

(2) sliding block tripod platform system combines line slideway and steadily can moved and tripod adaptive very well The advantages of ability and its supporting ＆ stablizing, avoid when adjusting camera system locus, occur significantly affecting measurement result Situation is rocked, and the high-precision sensor of camera is caused to damage；

(3) using multi-camera measurement system can accurate measurement two-freedom flexible arm three dimensions various vibration feelings Condition, it ensure that the subsequently vibration analysis to flexible arm has very high accuracy, provided very well for the vibration control of flexible arm Guarantee；The parallel space or depth perception camera of binocular and monocular vision plane camera all have flexibility very strongly so that the survey Amount system has very strong measurement capability.

Brief description of the drawings

Fig. 1 is that the general structure of flexible arm space oscillations specificity analysis device of the utility model based on polyphaser is illustrated Figure；

Fig. 2 is the side view of flexible arm space oscillations specificity analysis device of the utility model based on polyphaser；

Fig. 3 is the top view of flexible arm space oscillations specificity analysis device of the utility model based on polyphaser；

Fig. 4 is the camera system axle measuring of flexible arm space oscillations specificity analysis device of the utility model based on polyphaser Big schematic diagram；

Fig. 5 is the knot of adjustable seats I in flexible arm space oscillations specificity analysis device of the utility model based on polyphaser Structure schematic diagram；

Fig. 6 is the structure that bearing II is adjusted in flexible arm space oscillations specificity analysis device of the utility model based on polyphaser Schematic diagram；

Fig. 7 is reductor support base in flexible arm space oscillations specificity analysis device of the utility model based on polyphaser Structural representation；

Fig. 8 is the structure of sliding block assembly in flexible arm space oscillations specificity analysis device of the utility model based on polyphaser Schematic diagram；

Fig. 9 is adjustable foot duct member in flexible arm space oscillations specificity analysis device of the utility model based on polyphaser Structural representation.

Embodiment

It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase Mutually combine, the application is described in further detail with specific embodiment below in conjunction with the accompanying drawings.

Embodiment

A kind of flexible arm space oscillations specificity analysis device based on polyphaser, the device include Dual-Servo Motor driving The support system part of two-freedom large arm telecontrol equipment part, experiment pedestal and sliding block tripod platform composition, and by three The polyphaser space measurement analysis system part that individual camera is formed；

As shown in Fig. 1 to Fig. 4, AC servo motor I (13), it is connected by reductor I (14) and with reductor I (14) I-shaped adjutage (15), drive flexible large arm I (16) to rotate, collectively formed with reductor I (14), reductor support base (12) One-level rotating unit；Reductor support base (12), including fixed board (121), base-plate (122), supporting vertical plate (123) with And supporting plate (124), as shown in fig. 7, (laterally with uniform 2 of 70mm spacing, longitudinal direction is between 45mm by M6 arrays bolt Away from uniform 4, and symmetrical on the center line of length and width) be fixed on the right side table top of experiment pedestal (1), it is propped up Seat bottom plate (122) and experiment pedestal (1) respective length direction center line are at a distance of 55mm, and its fixed board (121) end face is away from experiment Pedestal (1) front end face 23mm；Reductor I (14) is concentrically mounted on through its assembly flange disk and 8 M5 bolts (PCD 109mm) On fixed board (121) inner face of reductor support base (12), distance experiment pedestal (1) working face 40mm；AC servo electricity Machine I (13) is concentrically mounted to the flange boss of reductor I (14) and by reductor support base through 4 M6 bolts (PCD 70mm) (12) supporting plate (124) support limit；I-shaped adjutage (15) front end face, by 8 M5 bolts (PCD 50mm) and slow down The output boss of machine I (14) is connected with one heart, and end face is by 8 M5 bolts (PCD 50mm) thereafter and flexible large arm I (16) is near End joint face is connected with one heart；

AC servo motor II (18), flexible large arm II (20) is driven to rotate by reductor II (19), with reductor II (19), the common structure 5 of deceleration machine support (17) is into two level rotating unit；Deceleration machine support (17), by 8 M5 bolts, (PCD is The distal end joint face of flexible large arm I (16) 50mm) is fixed on, reductor II (19) is through its assembly flange disk and 8 M5 bolts (PCD 79mm), is concentrically mounted on the fixed board of deceleration machine support (17), on the inside of deceleration machine support (17) bottom plate 68mm；For AC servo motor II (18) through 2 M5 bolts (PCD 46mm), the flange for being concentrically mounted to reductor II (19) is convex On platform；The band hole end surface of flexible large arm II (20) directly through 8 M5 bolts (PCD 31.5mm), is concentrically mounted to reductor II (19) output boss.

In the present embodiment, AC servo motor I (13) selects the HC-MFS serial motors of MIT, model HC-MFS-73, power output 750W, AC servo motor II (18) is equally from the HC-MFS series electricity of MIT Machine, model HC-MFS-43, power output 400W, rated speed are 3000r/min；Reductor I (14) is from Germany The low backhaul gap flange output speed reducer of Neugart companies, model PLEN 90-2-80, rated output torque are 80N* M, reductor II (19) equally select the low backhaul gap flange output speed reducer of German Neugart companies, model PLEN 64-2-65, rated output torque are 65N*m.

The support system of sliding block tripod platform composition is by uniform three rail assembly (2), sliding block assembly (3), adjustable foot tube Part (4) and camera system head (5) composition, have the adjustment structure of four different height or angle, can be easily Meet the measurement request of diverse location index point in flexible large arm I (16) and flexible large arm II (20)；

In the support system of sliding block tripod platform composition, each sliding block assembly (3) can be along uniform three rail assembly (2) Slidably, while sliding block assembly (3) can be fixed on guide rail to the guide rail worked in coordination therewith by sliding block positioning knob (33) Optional position on, any one mobile sliding block assembly (3) can realize three sliding block assemblies (3) smoothly synchronizing moving, General tripod platform regulation podium level is avoided, the trouble of tripod platform must be lifted；

Wherein, sliding block assembly (3) is made up of foot tube contiguous block (31), sliding block (32) and sliding block positioning knob (33), such as Fig. 8 It is shown；Adjustable foot duct member (4) by two ball connecting rods (41), foot tube inner shaft lever (42), foot tube locking knob (43), foot tube outside Axle sleeve (44) and two foot tube side end cap (45) compositions, as shown in Figure 9；Each adjustable foot duct member (4) can be by adjusting loose pin Pipe locking knob (43) changes its total length, and fixes its target length by tightening foot tube locking knob (43), and different can Adjust foot tube part (4) length combination, it is possible to achieve the different angle demand of camera system head (5), while ball connecting rod (41) All it is to use mating spherical surfaces between foot tube inner shaft lever (42) end, foot tube outer shaft (44) end and foot tube side end cap (45), and Fixed with 4 M2 bolts (horizontal and vertical with uniform 2 of 12mm spacing, and on length and the center line of width Symmetrically), the degree of flexibility of sliding block tripod platform system is enhanced.

In the present embodiment, uniform three rail assembly (2) and three sliding block assemblies (3) are by three independent supporting miniature straight lines Guide rail forms, and is from the MISUMI standard micro line slideways of Japanese rice Si meter companies, model SSEBW20-700, material Stainless steel, standard rail width W1, height H1 and length L are respectively 15mm, 9.5mm, 700mm, the miniature sliding block of outfit standard；Can Foot tube part (4) is adjusted to select the tripod scaffold tube of Japanese Nikon company, model CX-560.

The polyphaser space measurement analysis system being made up of three cameras, mainly include three camera assemblies, adjustable seats I (6), camera fast-assembling platform (7) and adjustable seats II (8) four are most of, and three described camera assemblies are respectively depth camera assembly I (9) and depth camera assembly II (10), and plane camera assembly (11), described depth camera assembly I (9) and depth phase Machine assembly II (10) is respectively symmetrically arranged on the left side fast-assembling connecting hole and right side fast-assembling connecting hole of camera fast-assembling platform (7), depth Camera assembly I (9) and depth camera assembly II (10) are parallel to each other and installed at a distance of 196mm, camera fast-assembling platform (7) centering installation On the fast-assembling flange (61) of adjustable seats I (6), plane camera assembly (11) is arranged on the Quick-mounting board of adjustable seats II (8) (81) on；

Wherein, depth camera assembly I (9) is made up of industrial camera, industrial lens and camera fast-assembling block three parts, and is passed through Industrial camera is fixedly connected by 4 M3 bolts with camera fast-assembling block, depth camera assembly II (10) and plane camera assembly (11) All composition parts it is consistent with depth camera assembly I (9)；

Adjustable seats I (6) are by fast-assembling flange (61), bearing shaft core I (62), bearing locking knob I (63), bearing axle sleeve I (64) and the part of bearing flange I (65) five is formed, as shown in figure 5, can arbitrarily be changed by adjusting loose bearing locking knob I (63) Become the height of three camera assemblies, and its object height is fixed by tightening bearing locking knob I (63), be concentrically mounted to camera System head (5)；Adjustable seats II (8) are by Quick-mounting board (81), bearing shaft core II (82), bearing locking knob II (83), bearing Shaft sleeve II (84) and the part of bearing flange II (85) five are formed, as shown in fig. 6, bearing locking knob II can be sent by adjusting (83) height of plane camera assembly (11), is changed, and by tightening bearing locking knob II (83) fixed pan camera assembly (11) object height, be fixed on above the center line of camera fast-assembling platform (7) length direction and with the fast-assembling method of adjustable seats I (6) Blue (61) are concentric；

Adjustable seats I (6) and adjustable seats II (8) can realize the fixed part in its top while height is adjusted The angle-adjustable in the plane parallel with camera system head (5).

The measuring system of three camera compositions, a camera are used for the vibration information of measurement plane, two other phase unit Into binocular stereo vision, for the information that fathoms, so detection plane and depth information are combined, it is possible to pass through inspection The information that the index point surveyed on flexible arm vibrates in space three-dimensional.

In the present embodiment, industrial camera selects the fort alliance TX Series Industrial cameras of Switzerland Baumer (fort alliance) company, model For：TX-G02C, appearance and size are 60mm × 52mm × 33mm, and sensor is Sony ICX618, and sensitive chip type is line by line The CCD of scanning, sensitive chip size are 3.6736mm × 2.744mm, and pixel dimension is 5.6 μm of 5.6 μ m, resolution ratio (pixel) For 656 × 490, optical filter is RGB Bayer Mosaic, is equipped with global shutter and c-type lens interface；Industrial lens (92) are selected With the c-type interface industrial lens of Japanese Computar companies, model M5018-MP2, appearance and size is 33.5mm × 38.2mm, Focal length is 50mm, and maximum caliber ratio is 1：1.8, filter size M30.5p=0.5mm.

A kind of implementation method of described flexible arm space oscillations specificity analysis device based on polyphaser is, including as follows Step：

AC servo motor I (13) in first step one-level rotating unit, passes through reductor I (14) and I-shaped adjutage (15) flexible large arm I (16) and two level rotating unit thereon is driven to rotate, the AC servo motor II in two level rotating unit (18), flexible large arm II (20) is driven to rotate by reductor II (19), the rotational plane of two rotating units is mutually perpendicular to；

AC servo motor I (13) is watched with exchanging in rotary photoelectric encoder difference detecting step one built in second step application The angle position signal of motor II (18) is taken, industrial computer (22) is transferred in the lump and waits for corresponding algorithm process；

3rd step depth camera assembly I (9) and the parallel binocular vision system of depth camera assembly II (10) composition, fast shorthand The spatial positional information of index point in flexible large arm I (16) and flexible large arm II (20) is recorded, plane camera assembly (11) then records Flexible large arm I (16) in its field of view, flexible large arm II (20) and the plane information of all index points thereon；

4th step industrial computer (22) obtains picture index point information using corresponding algorithm process step 3, and combines Servomotor rate signal obtained by step 2, then corresponding algorithm process is carried out, analysis obtains flexible large arm I (16) and flexibility Large arm II (20) flexural vibrations in space and twisting vibration situation.

While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art, It is understood that these embodiments can be carried out in the case where not departing from principle of the present utility model and spirit a variety of etc. The change, modification, replacement and modification of effect, the scope of the utility model are limited by appended claims and its equivalency range.

Claims (7)

1. a kind of flexible arm space oscillations specificity analysis device based on polyphaser, it is characterised in that including experiment pedestal, slow down Machine support base, AC servo motor I, reductor I, I-shaped adjutage, flexible large arm I, deceleration machine support, AC servo motor IIth, reductor II and flexible large arm II；

The reductor support base is fixed on the experiment pedestal, and the AC servo motor I is fixed on reductor support base On；

The reductor I is fixedly connected with the drive shaft of AC servo motor I, and the flexible large arm I is extended by the I-shaped Arm is fixedly connected with reductor I, and AC servo motor I drives reductor I by axle, so as to drive flexible large arm I；

The reductor II is fixedly connected with the flexible large arm I by the deceleration machine support, and the AC servo motor II is solid Surely reductor II is connected, the flexible large arm II is fixedly connected with reductor II, and the axle of AC servo motor II drives reductor II, so as to drive flexible large arm II to rotate.

2. the flexible arm space oscillations specificity analysis device based on polyphaser as claimed in claim 1, it is characterised in that also wrap Include camera fixing support, adjustable seats I, adjustable seats II, camera fast-assembling platform, camera assembly I, depth camera assembly II and plane Camera assembly；

Wherein, on one end fixed camera fixed support of adjustable seats I, the fixedly adjustable bearing II of the other end, in the middle part of camera fast-assembling platform The junction being fixed between adjustable seats I and adjustable seats II, camera assembly I and depth camera assembly II are respectively arranged at phase Machine fast-assembling platform both ends, plane camera assembly are arranged at the top of adjustable seats II；

The camera fixing support is fixedly mounted on by experiment pedestal, and camera assembly I, depth camera assembly II and plane camera The camera lens face experiment pedestal of assembly.

3. the flexible arm space oscillations specificity analysis device based on polyphaser as claimed in claim 2, it is characterised in that also wrap Include industrial computer and encoder；

The encoder is integrated in the AC servo motor I and AC servo motor II, for detecting the He of AC servo motor I The angle position signal of AC servo motor II, and sent after the encoded device of angle position signal is resolved into card to industry calculating Machine；

Industrial computer connection encoder, camera assembly I, depth camera assembly II and the plane camera assembly, for receiving The photographic intelligence of camera assembly transmission is simultaneously analyzed and processed, and for receiving the information and processing information of encoder transmission.

4. the flexible arm space oscillations specificity analysis device based on polyphaser as claimed in claim 2, it is characterised in that described Camera fixing support uses tripod, and the tripod includes 3 rail assemblies, 3 sliding block assemblies, 3 adjustable foot duct members And camera system head；Rail assembly is fixedly connected with the bottom of adjustable foot duct member, 3 adjustable foots by sliding block assembly respectively The equal fixed camera system head in top of duct member, the fixedly adjustable bearing I of camera system head.

5. the flexible arm space oscillations specificity analysis device based on polyphaser as claimed in claim 4, it is characterised in that described Adjustable foot duct member includes 2 ball connecting rods, foot tube inner shaft lever, foot tube locking knob, foot tube outer shaft and 2 foot tube sides Lid；Each adjustable foot duct member can change its total length by adjusting the foot tube locking knob, and by tightening pin Pipe locking knob fixes its target length, different adjustable foot duct member length combinations, realizes the different angle of camera system head Degree demand；All it is simultaneously to use sphere between ball connecting rod and foot tube interior axle boom end, foot tube outer shaft end and foot tube side end cap Coordinate, for strengthening the degree of flexibility of sliding block tripod platform system.

6. the flexible arm space oscillations specificity analysis device based on polyphaser as claimed in claim 2, it is characterised in that described Adjustable seats I include fast-assembling flange, bearing shaft core I, bearing locking knob I, bearing axle sleeve I and bearing flange I, fast-assembling flange Hold-down support shaft core I, the hold-down support axle sleeve I of bearing flange I；The spiral hold-down support axle sleeve I of bearing shaft core I, and locked by bearing Tight knob I adjusts the height of bearing shaft core I.

7. the flexible arm space oscillations specificity analysis device based on polyphaser as claimed in claim 2, it is characterised in that described Adjustable seats II include Quick-mounting board, bearing shaft core II, bearing locking knob II, bearing shaft sleeve II and bearing flange II, Quick-mounting board Hold-down support shaft core II, the hold-down support shaft sleeve II of bearing flange II；The spiral hold-down support shaft sleeve II of bearing shaft core II, and pass through branch Seat locking knob II adjusts the height of bearing shaft core II.