CN205642327U - Automobile wheel hub bearing inner race axial detecting system reciprocates device - Google Patents

Automobile wheel hub bearing inner race axial detecting system reciprocates device Download PDF

Info

Publication number
CN205642327U
CN205642327U CN201620416655.1U CN201620416655U CN205642327U CN 205642327 U CN205642327 U CN 205642327U CN 201620416655 U CN201620416655 U CN 201620416655U CN 205642327 U CN205642327 U CN 205642327U
Authority
CN
China
Prior art keywords
seat
assembly
inner ring
hub bearing
detecting system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201620416655.1U
Other languages
Chinese (zh)
Inventor
包治全
刘海波
王大平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Changjiang Bearing Co Ltd
Original Assignee
Chongqing Changjiang Bearing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing Changjiang Bearing Co Ltd filed Critical Chongqing Changjiang Bearing Co Ltd
Priority to CN201620416655.1U priority Critical patent/CN205642327U/en
Application granted granted Critical
Publication of CN205642327U publication Critical patent/CN205642327U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses an automobile wheel hub bearing inner race axial detecting system reciprocates device, at the top of lathe bed fix the support frame, the below of support frame sets up the supporting seat, and it has the guide bar to support through linear bearing in the supporting seat, the lower extreme of guide bar is fixed with the locating plate, and the locating plate is connected with the piston rod of cylinder, and the cylinder body of cylinder passes through the support to be fixed with the supporting seat mutually the upper end installation axial of guide bar detects assembly down. The utility model relates to a rationally, simple structure, compactness, easily assembly, the controllability is good, and size detection is synthesized to the axial that can be used to one type of two channel of automobile wheel hub bearing inner race, makes the testing result accurate, reliable, detection stable good, detection efficiency height to repeated detection precision is high, helps the enterprise to improve the qualification rate of product, avoids the product to scrap and produces economic loss.

Description

The axial detecting system in automobile hub bearing outer ring moves up and down device
Technical field
This utility model relates to the axial detecting system in a kind of automobile hub bearing outer ring and moves up and down device, is used for The axial overall dimensions detection of one class automobile hub bearing outer ring part two raceway groove.
Background technology
At present, more and more higher along with properties of product and the prescription of country's auto parts and components.At automotive hub During bearing Assembling Production, the testing requirement of outer ring part is also more and more tighter.If the inspection of outer ring part Survey stability, accuracy of detection are the highest, and the qualification rate of the product that is bound to is the highest, can cause substantial amounts of product rejection, Enterprise is made to suffer substantial amounts of economic loss.
Utility model content
Because the above-mentioned deficiency of prior art, technical problem to be solved in the utility model is to provide one Plant the axial detecting system in automobile hub bearing outer ring and move up and down device.
The technical solution of the utility model is as follows: move down in the axial detecting system in a kind of automobile hub bearing outer ring Dynamic device, it is characterised in that: at the top fixing support rack of lathe bed, the lower section of bracing frame arranges support seat, Being supported with guide post by linear bearing in supporting seat, the lower end of described guide post is fixed with location-plate, location Plate is connected with the piston rod of cylinder, and the cylinder body of cylinder is fixed, in described guiding with supporting seat by bearing The lower assembly of axially detection is installed in the upper end of bar.
Use above technical scheme, the when of detection, automobile hub bearing outer ring part is put into outer ring axial Measure position, control cylinder action, make the piston rod of cylinder drive guide post by location-plate and axially detect Lower assembly moves upward, and axially the lower assembly of detection contacts with the gauge head of the upper assembly of axially detection on bracing frame, Measured the size of minor variations by measuring staff by high-precision detector for displacement measuring, then through control system signal Amplify and feed back to lower assembly process, thus realize measuring.This utility model can be used for detecting automobile hub bearing The ditch heart of outer ring is away from, the axially overall dimensions such as ditch shape, ditch external diameter, it can be ensured that the qualification rate of product, and protects Demonstrate,prove the stability of product quality.Guide post moves up and down in linear bearing, and rectilinear movement is steadily up and down, Linear movability is good, it can be ensured that the accuracy of measurement result.
Under described axial detection, assembly has lower assembly and fixes seat, and lower assembly fixes the fixing lower inner ring in top of seat Briquetting, the pillar that lower assembly fixes seat top middle portion stretches in lower inner ring briquetting, and the top of pillar is provided with conjunction Gold bullion, on described lower inner ring briquetting, set loads retainer, lower retainer is arranged and multiple the most uniformly divides The lower measurement steel ball of cloth, these lower measurement steel balls are supported by lower angled slide block, and described lower angled slide block is solid with lower assembly Reservation is slidably matched, and is provided with lower stage clip between lower angled slide block and lower press spring base below, on described lower top The upper end and the lower assembly that go out block are fixed and are arranged lower measurement inner ring between seat;At the lower end of support frame as described above setting-in Fagging, via is offered in the position of the corresponding described lower inner ring briquetting of gripper shoe.Assembly structure under above-mentioned axial detection Simply, compact, it is easy to assembling, and flexible in operation, under the effect of stage clip, measure steel ball after having detected Can automatically reset, so without manual operation, be greatly saved manpower, and be effectively increased detection efficiency.
Described bearing is " L " shape, is made up of transverse slat and riser, and the riser of bearing fits fixing with supporting seat, The transverse slat of bearing is installed the cylinder body of cylinder.Above structural bearings moulding is simple, and processing and fabricating is easy, makes Cylinder firmly installs, and will not shake.
The piston rod of described cylinder docks mutually with extension bar, is fixed by swivel nut between the two, and described extension bar is vertical Through location-plate, stop nut and locking nut fixing, stop nut and locking nut are lived apart at location-plate Both sides up and down.Above structure can regulate the height and position of the lower assembly of axially detection, regulation behaviour as required Make simple, convenient, fast;And stop nut can ensure that when measuring, up displacement is equal every time, The compression distance making spring is identical, thus when ensure that measurement every time, spring pressurization power is identical.
At the lower end suspended fixing riser of described support seat, equipped with upper and lower two displacement inductive switches on this riser, The sensing screw matched with displacement inductive switch is fixed on location-plate.Displacement inductive switch is by sensing screw Trigger, the signal of telecommunication is passed to control system, under control of the control system, it is ensured that steady when measuring every time The pressure time, thus ensure that the measured value of high precision displacement measuring instrument is stable.
In order to prevent lower stage clip from finding crooked or skew, it is ensured that measurement result is accurate, fixes at described lower assembly The outside of seat is symmetrical arranged lower stage clip, and the upper end of this lower stage clip is stretched in lower angled slide block, and the lower end of lower stage clip is stretched Enter in lower press spring base.
Firm in order to make lower measurement inner ring install, do not occur to loosen or come off, described lower measurement inner ring is interior with lower Circle briquetting and lower assembly fix seat tight fit.
Beneficial effect: this utility model is reasonable in design, simple in construction, compact, it is easy to assembling, controllability is good, Can be used for the axial overall dimensions detection of class automobile hub bearing outer ring two raceway groove, make testing result accurately, Reliably, the good stability of detection, detection efficiency is high, and duplicate detection precision is high, contributes to enterprise and improves The qualification rate of product, it is to avoid product rejection and produce economic loss.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the layout schematic diagram of bracing frame upper-part.
Fig. 3 is the structural representation of the upper assembly of axially detection.
Fig. 4 is the structural representation of the lower assembly of axially detection.
Detailed description of the invention
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings:
As shown in Figure 1 and Figure 2, lathe bed 1 is fixed on ground by foundation bolt.Set at the top of lathe bed 1 Putting bracing frame 2, the bottom surface of this bracing frame 2 fits with the top board of lathe bed 1, and bracing frame 2 is by bolt and bed Body 1 fixes.Arranging positioning seat 3 in the lower section of bracing frame 2 upper end hanging deck, this positioning seat 3 is hollow structure, The upper end of positioning seat 3 is inserted in the through hole of bracing frame 2 upper end hanging deck, and positioning seat 3 is by bolt and support The hanging deck of frame 2 upper end is fixing to be connected.
As shown in Figure 1 and Figure 2, in positioning seat 3, measuring unit 4, measuring unit 4 and positioning seat 3 gap are worn Coordinate.Being arranged above positioning sleeve 32 at measuring unit 4, detector for displacement measuring 5 is installed on positioning sleeve 32, The contact of detector for displacement measuring 5 is straight down through positioning sleeve 32, and stretches in measuring unit 4.Positioning sleeve 32 leads to Crossing fixed cover 33 to be connected with measuring unit 4, fixed cover 33 is by the screw radially worn and positioning sleeve 32 and measurement Set 4 fixes.The contact of shift measurement instrument 5 contacts with the end face measuring bar 6, measures bar 6 and is positioned at measuring unit 4 In.
As shown in Figure 1 and Figure 2, the lower end of measuring unit 4 is stretched into assembly and is fixed in seat 7, and both pass through bolt Fixing.Upper assembly fixes seat 7 suspended fixing in the lower section of positioning seat 3, and upper assembly fixes the concrete peace of seat 7 Dress mode is preferably: seat 7 is fixed by four stay bolts by the rectangular distribution and upper assembly in the lower end of positioning seat 3 Connecting, stay bolt and positioning seat 3 matched in clearance, the head of stay bolt is supported by positioning seat 3, stay bolt Lower end is fixed seat 7 with upper assembly and is threadeded, and each stay bolt is all set with spring 8.
As shown in Figure 1, Figure 2, Figure 3 shows, the bottom fixing seat 7 at upper assembly arranges inner ring briquetting 9, on Inner ring briquetting 9 is fixed seat 7 by bolt and upper assembly and is fixed.On upper inner ring briquetting 9, holding loaded onto by set Frame 10, holder 10 arranges the most equally distributed multiple upper measurement steel ball 11, upper measurement steel ball 11 Number determine according to actual needs.It is provided above angled slide block 12, upper angled slide block at holder 10 12 are supported jointly by all of upper measurement steel ball 11, and on this, angled slide block 12 is located on assembly and fixes on seat 7, And upper angled slide block 12 fixes seat 7 with upper assembly and is slidably matched.It is provided above compression spring at upper angled slide block 12 Seat 13, compression spring seat 13 Fixing shrink ring is fixed on seat 7 in upper assembly.Upper angled slide block 12 and compression spring seat 13 Between be provided with compression spring 14, the outside that compression spring 14 fixes seat 7 at upper assembly is symmetrical, this compression spring The upper end of 14 is stretched in compression spring seat 13, and the lower end of compression spring 14 is stretched in angled slide block 12.Eject upper The lower end of block 12 and upper assembly are fixed and are arranged measurement inner ring 15, upper measurement inner ring 15 between the lower end of seat 7 Suitable with upper measurement steel ball 11, and upper measurement inner ring 15 fixes seat 7 and upper inner ring briquetting 9 with upper assembly Tight fit.
As shown in Figure 1, Figure 2, Figure 3 shows, wearing gauge head 16 in upper assembly fixes seat 7, gauge head 16 is positioned at Measuring the underface of bar 6, the upper end of gauge head 16 is stretched in measuring unit 4, and contacts with the bottom surface measuring bar 6; The lower end of gauge head 16 is stretched in inner ring briquetting 9, the lower surface of gauge head 16 and the bottom surface of upper inner ring briquetting 9 It is substantially flush.Being set with compression spring 17 on gauge head 16, compression spring 17 is positioned at assembly and fixes seat 7 In inner chamber, the upper end of compression spring 17 abuts with measuring unit 4, on the lower end of compression spring 17 and gauge head 16 Annular boss 16a abut, upper assembly is provided with the step surface coordinated with annular boss 16a in fixing seat 7, Drop out to prevent gauge head 16 from fixing in seat 7 from upper assembly.Above-mentioned upper assembly fix seat 7, upper inner ring briquetting 9, Holder 10, upper measurement steel ball 11, upper angled slide block 12, compression spring seat 13, compression spring 14, upper measurement The parts composition upper assemblies of axially detection such as inner ring 15, gauge head 16 and compression spring 17.
As Figure 1 and Figure 4, support seat 18 is set in the lower section of bracing frame 2, supports seat 18 and tie for hollow Structure, is supported seat 18 and is fixed by the top board of bolt with lathe bed 1, and supports the upper end of seat 18 through lathe bed 1 Top board extend in the base plate of bracing frame 2.It is supported with guide post 19 by linear bearing in supporting seat 18, Guide post 19 is positioned at the underface of gauge head 16, and the lower end of guide post 19, should beyond the bottom surface of support seat 18 One end of the lower end of guide post 19 and location-plate 20 is fixed, and guide post 19 is perpendicular to location-plate 20.Fixed The other end of position plate 20 vertically wears extension bar 35, and extension bar 35 is fixed by stop nut 37 and locking nut 38, Stop nut 37 and locking nut 38 are lived apart in the both sides up and down of location-plate 20.Surface at extension bar 35 Arranging cylinder 21, the piston rod of cylinder 21 stretches out straight down, the piston rod of this cylinder 21 and extension bar 35 phase Docking, is fixed by swivel nut 36 between the two.The cylinder body of cylinder 21 is installed by bearing 22, bearing 22 For " L " shape, being made up of transverse slat and riser, the riser of bearing 22 fits fixing with supporting seat 18, is propping up The cylinder body of cylinder 21 is installed on the transverse slat of seat 22.
As Figure 1 and Figure 4, the lower end suspended fixing riser 39 of seat 18, this riser 39 upper are being supported Hold and fixed with supporting seat 18 by bolt, equipped with upper and lower two displacement inductive switches 40 on riser 39, The sensing screw 41 matched with displacement inductive switch 40 is fixed on location-plate 20.Sensing screw 41 Number is one, and displacement inductive switch 40 is triggered by sensing screw 41, and the signal of telecommunication is passed to control system, Under control of the control system, it is ensured that voltage stabling control when every time measuring.
As Figure 1 and Figure 4, under the upper end of guide post 19 is installed, assembly fixes seat 23, and lower assembly is fixed The top of seat 23 arranges lower inner ring briquetting 24, and lower inner ring briquetting 24 fixes seat 23 phase by bolt with lower assembly Fixing.Lower assembly is fixed the seat 23 integral part of pillar of top middle portion and is stretched into the centre bore of lower inner ring briquetting 24 In, and the top of pillar is provided with the alloy block 25 matched with gauge head 16, the end face of alloy block 25 with lower in Being substantially flush of circle briquetting 24.
As Figure 1 and Figure 4, on lower inner ring briquetting 24, set loads retainer 26, on lower retainer 26 Arranging the most equally distributed multiple lower measurement steel ball 27, the number of lower measurement steel ball 27 is according to actual needs Determining, these lower measurement steel balls 27 are supported by lower angled slide block 28.Lower angled slide block 28 is located on lower assembly and fixes On seat 23, this lower angled slide block 28 is fixed seat 23 with lower assembly and is slidably matched.Lower section at lower angled slide block 28 Arranging lower press spring base 29, lower press spring base 29 Fixing shrink ring is fixed on seat 23 in lower assembly.At lower angled slide block 28 And being provided with lower stage clip 30 between lower press spring base 29, lower stage clip 30 fixes the outside symmetry cloth of seat 23 at lower assembly Putting, the upper end of this lower stage clip 30 is stretched in lower angled slide block 28, and lower press spring base 29 is stretched in the lower end of lower stage clip 30 In.
As Figure 1 and Figure 4, fix in the upper end of lower angled slide block 28 and lower assembly lower survey is set between seat 23 Amount inner ring 31, lower measurement inner ring 31 is suitable with lower measurement steel ball 27, this lower measurement inner ring 31 and lower inner ring Briquetting 24 and lower assembly fix seat 23 tight fit.Gripper shoe 34 it is embedded in the base plate of bracing frame 2 lower end, Via is offered in the position of the corresponding lower inner ring briquetting 24 of gripper shoe 34.Above-mentioned lower assembly fixes seat 23, lower inner ring Briquetting 24, alloy block 25, lower retainer 26, lower measurement steel ball 27, lower angled slide block 28, lower press spring base 29, The lower assemblies of parts composition axially detection such as lower stage clip 30 and lower measurement inner ring 31.
Operation principle of the present utility model is as follows:
The when of detection, automobile hub bearing outer ring part 42 is placed in gripper shoe 34, controls cylinder 21 actions, make the piston rod of cylinder 21 by location-plate 20 drive guide post 19 and axially the lower assembly of detection to Upper motion, lower measurement steel ball 27 initially enters in the raceway groove of part 42 lower end, hub bearing outer ring, then takes turns Hub axle bearing outer-ring part 42 moves upwardly together with the lower assembly of axially detection, and then upper steel ball 11 of measuring enters In the raceway groove of part 42 upper end, hub bearing outer ring, continue under the driving of cylinder 21 along with guide post 19 on OK, the lower angled slide block 28 of lower measurement steel ball 27 compressing overcomes the elastic force of lower stage clip 30, make lower angled slide block 28 to Lower motion, until lower measurement steel ball 27 engages with lower measurement inner ring 31;Meanwhile, upper measurement steel ball 11 In compressing, angled slide block 12 overcomes the elastic force of compression spring 14, makes angled slide block 12 move upward, until upper measurement Steel ball 11 engages with upper measurement inner ring 15;At upper and lower measurement steel ball and the corresponding engaging process measuring inner ring In, lower assembly is fixed the alloy block 25 on seat 23 top and is contacted gauge head 16, by high-precision detector for displacement measuring 5 Measured the size of minor variations by measuring staff 6, then feed back to lower assembler through the amplification of control system signal Sequence, thus realize measuring.Fix at upper assembly and between seat 7 and positioning seat 3, be provided with spring 8, spring during measurement The elastic force of 8 can make hub bearing outer ring part 42 and axially detect upper and lower assembly from dynamic(al) correction.

Claims (7)

1. the axial detecting system in automobile hub bearing outer ring moves up and down device, it is characterised in that: at bed The top fixing support rack (2) of body (1), the lower section of bracing frame (2) arranges support seat (18), supports seat (18) it is supported with guide post (19), the lower end of described guide post (19) and location-plate by linear bearing in (20) fixing, location-plate (20) is connected with the piston rod of cylinder (21), the cylinder body of cylinder (21) Fixed with supporting seat (18) by bearing (22), install axially in the upper end of described guide post (19) The lower assembly of detection.
The axial detecting system in automobile hub bearing outer ring the most according to claim 1 moves up and down device, It is characterized in that: under described axial detection, assembly has lower assembly and fixes seat (23), and lower assembly fixes seat (23) The fixing lower inner ring briquetting (24) in top, lower assembly is fixed the pillar of seat (23) top middle portion and is stretched into lower inner ring In briquetting (24), and the top of pillar is provided with alloy block (25), at the upper set of described lower inner ring briquetting (24) Load retainer (26), lower retainer (26) arrange the most equally distributed multiple lower measurement steel ball (27), Measure steel ball (27) under these to be supported by lower angled slide block (28), described lower angled slide block (28) and lower assembly Fixing seat (23) is slidably matched, and sets between lower angled slide block (28) and lower press spring base (29) below There is lower stage clip (30), fix in the upper end of described lower angled slide block (28) and lower assembly and arrange between seat (23) Lower measurement inner ring (31);In the lower end of support frame as described above (2) setting-in gripper shoe (34), gripper shoe (34) Via is offered in the position of corresponding described lower inner ring briquetting (24).
The axial detecting system in automobile hub bearing outer ring the most according to claim 1 moves up and down device, It is characterized in that: described bearing (22) is " L " shape, is made up of transverse slat and riser, erecting of bearing (22) Plate fits fixing with supporting seat (18), installs the cylinder body of cylinder (21) on the transverse slat of bearing (22).
4. move down according in the axial detecting system in automobile hub bearing outer ring described in claim 1 or 2 or 3 Dynamic device, it is characterised in that: the piston rod of described cylinder (21) docks mutually with extension bar (35), both it Between by swivel nut (36) fix, described extension bar (35) passes perpendicularly through location-plate (20), by stop nut (37) Fixing with locking nut (38), stop nut (37) and locking nut (38) are lived apart in location-plate (20) Both sides up and down.
The axial detecting system in automobile hub bearing outer ring the most according to claim 4 moves up and down device, It is characterized in that: in lower end suspended fixing riser (39) of described support seat (18), on this riser (39) Equipped with upper and lower two displacement inductive switches (40), the sensing screw (41) matched with displacement inductive switch (40) It is fixed on location-plate (20).
The axial detecting system in automobile hub bearing outer ring the most according to claim 2 moves up and down device, It is characterized in that: the outside fixing seat (23) at described lower assembly is symmetrical arranged lower stage clip (30), presses under this The upper end of spring (30) is stretched in lower angled slide block (28), and lower press spring base (29) is stretched in the lower end of lower stage clip (30) In.
7. move up and down dress according to the axial detecting system in automobile hub bearing outer ring described in claim 2 or 6 Put, it is characterised in that: described lower measurement inner ring (31) fixes seat with lower inner ring briquetting (24) and lower assembly (23) tight fit.
CN201620416655.1U 2016-05-10 2016-05-10 Automobile wheel hub bearing inner race axial detecting system reciprocates device Active CN205642327U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620416655.1U CN205642327U (en) 2016-05-10 2016-05-10 Automobile wheel hub bearing inner race axial detecting system reciprocates device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620416655.1U CN205642327U (en) 2016-05-10 2016-05-10 Automobile wheel hub bearing inner race axial detecting system reciprocates device

Publications (1)

Publication Number Publication Date
CN205642327U true CN205642327U (en) 2016-10-12

Family

ID=57058494

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620416655.1U Active CN205642327U (en) 2016-05-10 2016-05-10 Automobile wheel hub bearing inner race axial detecting system reciprocates device

Country Status (1)

Country Link
CN (1) CN205642327U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108168409A (en) * 2017-12-28 2018-06-15 天津中嘉利达机械部件有限公司 A kind of device of Rough Inspection splined shaft

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108168409A (en) * 2017-12-28 2018-06-15 天津中嘉利达机械部件有限公司 A kind of device of Rough Inspection splined shaft

Similar Documents

Publication Publication Date Title
CN205642328U (en) Automobile wheel hub bearing inner race axial detecting system
CN105783814A (en) System for axially detecting outer ring of automobile hub bearing
US10401256B2 (en) Vertical displacement detecting device
CN106918518B (en) Photovoltaic cell piece bending resistance endurance test device
CN205642327U (en) Automobile wheel hub bearing inner race axial detecting system reciprocates device
CN205642334U (en) Automobile wheel hub bearing inner race axial measuring device
CN207280411U (en) A kind of height detection apparatus of bearing ring
CN205642235U (en) Automobile wheel hub bearing inner race axial detects and goes up assembly
CN104864833B (en) Floating detection device
CN208805182U (en) A kind of wheel hub positioning and clamping device for wheel hub detection
CN205642326U (en) Automobile wheel hub bearing inner race axial detects assembly down
CN208704709U (en) Ring stiffness inner diameter measuring device
CN106066166A (en) A kind of equipment detecting cylinder cover bottom surface benchmark and combustor test point difference in height
CN106644260B (en) 2MN dead weight superposition composite force standard machine
KR100926964B1 (en) Measuring device for plate of ball bush
CN206638118U (en) One kind is used to measure angular contact ball bearing bulge quantity frock
CN206523107U (en) Handle of a knife general measuring instrument
CN212008858U (en) Motor load detection device
CN208688807U (en) Deep groove ball bearing device for measuring axial clearance
CN204128534U (en) Deep groove ball bearing outer ring locking groove detector
CN113358741A (en) Steel pipe inner wall defect detection device
CN207487637U (en) A kind of cold press measuring device
CN109341462B (en) Quick detection device that mechanical part beats
CN206832224U (en) For determining the self-operated measuring unit of butterfly spring load and deformation
CN216865271U (en) High accuracy pile foundation static load detects data acquisition structure

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant