CN203561472U - Wheel core axle bolt pretightening force detection device - Google Patents
Wheel core axle bolt pretightening force detection device Download PDFInfo
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- CN203561472U CN203561472U CN201320645622.0U CN201320645622U CN203561472U CN 203561472 U CN203561472 U CN 203561472U CN 201320645622 U CN201320645622 U CN 201320645622U CN 203561472 U CN203561472 U CN 203561472U
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- mandrel
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- shaft screw
- foil gauge
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Abstract
The utility model discloses a wheel core axle bolt pretightening force detection device comprising a base, a connecting block and a core axle. The connecting block is connected with the base; the core axle is connected with the connecting block and is provided with a through hole at the center; the axis of the through hole is perpendicular to the base; the lower end of the through hole is provided with an internal thread; a core axle bolt is disposed in the through hole; the lower end of the core axle bolt is connected with the lower end thread of the through hole; a support sheath is disposed on the outer side of the upper end of the core axle in a sleeved manner and is in clearance fit with the core axle; the upper end of the support sheath is higher than the upper end of the core axle; the core axle bolt is contacted with the upper end of the support sheath; a strain foil group is bonded to the outer side face of the support sheath and is connected with a strain adapter which is connected with an industrial personal computer; and the upper end of the core axle bolt is provided with a sleeve which is connected with a torque wrench. The wheel core axle bolt pretightening force detection device can detect the bolt pretightening force rapidly and accurately without destroying the structures of bolts.
Description
Technical field
The utility model relates to detection device for bolt pretightening force, relates in particular to a kind of wheel shaft screw pretightning force pick-up unit.
Background technology
At present, in the first generation, second generation hub-bearing unit, hub bearing locks by mandrel and shaft screw, in order to study the relation of shaft screw's friction factor, mandrel and shaft screw's fitting area and its pretightning force, need play or pretightning force under hub bearing entrucking state to provide support, therefore need the moment of torsion of detecting core shaft bolt and the linear relationship of pretightning force.In prior art, common bolt pretightening detects the general following two schemes that adopts: the first scheme, in bolt end central punch, sensitive element is imbedded to bolt inside, by the deformation of sensitive element perception bolt, electric signal to sensitive element output carries out analyzing and processing, gets pretightning force, detects; First scheme does not have on threaded double-screw bolt and processes measurement plane on bolt, and strain gauge adhesion, in this measurement plane, is drawn to signal wire by bolt bore, utilizes the strain of foil gauge to survey bolt pretightening.For the first scheme, some bolt self hardness is very high, is not easy to punching, and some bolt model is very little, punch very difficult, and all extremely difficult controls such as the smooth degree in right alignment, the hole of while hole and nut, thus cause accuracy of detection low, detection difficult; For first scheme, bolt is too little, is also difficult to process plane, and foil gauge lacks installation site, and the double-screw bolt entirety of some bolt is all threaded, and can affect the normal use of bolt after processing plane.To sum up, present screw axial pre tightening force detects all bolt self with destructiveness, and testing environment, state consistency be difficult to control, thereby causes accuracy of detection low, cannot detect even completely.
Chinese patent Granted publication number: CN202867494U, April 10 2013 Granted publication day, a kind of bolt that is provided with pretightning force detection rotary head is disclosed, comprise bolt, detect rotary head, fixed bar, spring, fixed pin and cementing agent, the axle center of bolt is provided with stepped hole, fixed pin holes and regulates pin-and-hole, detect rotary head and be provided with swing arm and adjustment pin, fixed bar is provided with boss and nut; Fixed bar is located in stepped hole, and cementing agent is connected fixed bar termination and stepped hole, detects rotary head and is sleeved on the boss of fixed bar, and fixed pin is embedded in fixed pin holes, and spring is located between adjustment pin and fixed pin.By naked-eye observation, detect the position of rotary head, can find early that the pretightning force of bolt reduces or lost efficacy, there is advantage simple in structure, easy to detect.Its weak point is need to process stepped hole in the axle center of bolt in this kind of detection mode, on a collection of bolt, each all processing step holes of bolt, the right alignment of each stepped hole, the degree of depth, diameter, roughness etc. can be variant, therefore pretightning force accuracy of detection is low, and consistance is poor.Bolt central punch also can reduce bolt self intensity simultaneously, destroys bolt self structure.
Utility model content
The utility model can destroy bolt self structure in order to overcome in bolt pretightening testing process of the prior art, the low deficiency of accuracy of detection simultaneously, provide a kind of in the situation that not destroying bolt self structure, can accurately detect the wheel shaft screw pretightning force pick-up unit of bolt pretightening, this kind of device is easy to detect, check while can be used for the factory inspection of wheel shaft screw and maintenance, thus hub-bearing unit stable performance guaranteed.
To achieve these goals, the utility model adopts following technical scheme:
One wheel shaft screw pretightning force pick-up unit, comprise pedestal, contiguous block and mandrel, contiguous block is connected with pedestal, mandrel is connected with contiguous block, the center of mandrel is provided with through hole, the axis of described through hole is vertical with pedestal, the lower end of described through hole is provided with internal thread, in through hole, be provided with shaft screw, the lower end of shaft screw is threaded with the lower end of through hole, the outside, upper end of mandrel is arranged with support set, described support set and mandrel clearance fit, the upper end of support set exceeds mandrel upper end, the upper end in contact of shaft screw and support set, on the lateral surface of support set, post foil gauge group, foil gauge group is connected with strain adapter, described strain adapter is connected with industrial computer, the upper end of shaft screw is provided with sleeve, described sleeve is connected with dial torque wrench.Jacket casing is in shaft screw, dial torque wrench is connected with sleeve, after dial torque wrench rotates, between shaft screw and mandrel, constantly tighten, shaft screw's extruding support set makes support set distortion, foil gauge group on support set also produces deformation, the pretightning force of shaft screw and the anchorage force of support set are a pair of acting force and reacting force, the equal and opposite in direction of power, specific moment of torsion of the every rotation of dial torque wrench all can be recorded, observe magnitude of voltage corresponding on industrial computer simultaneously, foil gauge group was demarcated by foil gauge caliberating device, therefore each voltage can a corresponding force value (this force value equals the pretightning force of shaft screw), thereby draw the relation of moment of torsion and pretightning force, realize the detection of pretightning force, in this kind of pretightning force testing process, do not need to destroy bolt self structure, can not affect bolt strength, whole structure of the detecting device is simple, detect very convenient, testing result is accurate.
As preferably, described support set comprises support set and lower support cover, the upper end of the described upper support set formation upper overturning that stretches out, and the lower end of described lower support cover stretches out and forms lower flange, and described foil gauge group is attached to lower support and puts.In order to make can there is larger dependent variable after support set pressurized, wall thickness is thinner compared with growing for the length of support set self, support set also can deformation when being subject to less pressure-acting like this, but so also cause the support set position, intermediate portion when large that is under pressure may radially arch upward and cause foil gauge to lose efficacy, therefore support set is divided into upper support set and lower support cover, upper support set and lower support cover self length is all much smaller than the length of single support set, therefore after being subject to larger pressure, position, intermediate portion is difficult for arching upward, thereby keep the dependent variable that detects that foil gauge group can be stable.
As preferably, described foil gauge group comprises four foil gauges, and four foil gauges adopt full-bridge modes to connect.Full-bridge connected mode, accuracy of detection is high,
As preferably, between described upper overturning and lower flange, be arranged with elastic seal cartridge.Elastic seal cartridge has the effect of protection foil gauge group, prevents that foil gauge group from receiving outside contamination, collision etc., and elastic seal cartridge can not affect the stressed of support set simultaneously.
As preferably, the lower end of the described mandrel formation joint flange that stretches out, mandrel is connected with contiguous block bolt by the connecting hole on joint flange, and the bottom center of joint flange is provided with pit, and described pit is communicated with through hole.Joint flange has effectively increased the connection area of mandrel lower end and contiguous block, thereby more can keep the verticality of mandrel and contiguous block, and pit is also the verticality in order to increase mandrel and contiguous block.
As preferably, the lower surface of described upper support set is provided with annular groove, and the upper surface of described lower support cover is provided with the annular boss corresponding with annular groove.Due to upper support set, lower support, overlapping between mandrel is all clearance fit, upper support set is only pressed in lower support and puts easy generation radial misalignments, go up the axis of support set and the not conllinear of axis of lower support cover, thereby cause the stress condition difference of lower support cover, annular groove coordinates with annular boss, can keep support set coaxial with lower support cover, thereby reduce to detect error.
A kind of foil gauge caliberating device, comprise pedestal, contiguous block and mandrel, contiguous block is connected with pedestal, mandrel is connected with contiguous block, the center of mandrel is provided with through hole, the axis of described through hole is vertical with pedestal, the outside of mandrel is arranged with support set, described support set and mandrel clearance fit, the upper end of support set exceeds mandrel upper end, on the lateral surface of support set, post foil gauge group, foil gauge group is connected with strain adapter, described strain adapter is connected with industrial computer, the upper end of support set is provided with briquetting, the lower end of briquetting is provided with reference column, reference column stretches into formation clearance fit in through hole, the center, upper surface of briquetting is provided with conical bore, in described conical bore, be provided with steel ball.
The pressure arm that adds carrier aircraft is pressed on steel ball and increases pressure load to steel ball, briquetting is directly pressed on support set, foil gauge group on support set is experienced this strain, thereby output signal produces corresponding magnitude of voltage after the processing of overstrain adapter and industrial computer, add after specific pressure of the every loading of carrier aircraft, recording voltage value, finally draw the linear relationship of pressure and voltage, therefore in shaft screw's pretightning force pick-up unit, when torque spanner rotates, the magnitude of voltage showing on industrial computer directly can be converted into corresponding force value (equal and opposite in direction of force value and pretightning force), thereby draw intuitively the relation of moment of torsion and pretightning force.
As preferably, the axis conllinear of the axis of described conical bore and reference column.When adding the load of carrier aircraft upper pressing arm and be added on steel ball, the pressure stepless action that steel ball produces briquetting is enclosed at support set one, thereby guarantees that a week of support set is stressed evenly, the stated accuracy of raising foil gauge group.
Therefore, the utlity model has in the situation that not destroying shaft screw's self structure, fast and accurately the beneficial effect of detecting core shaft bolt pretightening.
Accompanying drawing explanation
Fig. 1 is that mandrel holds detection device for bolt pretightening force structural representation.
Fig. 2 is foil gauge caliberating device structural representation.
Fig. 3 is foil gauge group signal processing structure schematic diagram in the utility model.
Fig. 4 is the local structure for amplifying schematic diagram in A place in Fig. 1.
In figure: on pedestal 1 contiguous block 2 mandrel 3 through hole 4 shaft screw's 5 support set 6 foil gauge group 7 strain adapter 8 industrial computer 9 sleeve 10 dial torque wrench 11 elastic seal cartridge 12 briquetting 13 reference column 14 conical bore 15 steel ball 16 pressure arm 17 joint flange 31 pits 32, support set 61 lower supports are overlapped 63 times flange of 62 upper overturning, 64 annular groove 65 annular boss 66.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further described:
A kind of wheel shaft screw pretightning force pick-up unit as shown in Figure 1, comprise pedestal 1, contiguous block 2 and mandrel 3, contiguous block is fixedly connected with foundation bolt, pedestal is provided with groove, the bottom of contiguous block 2 is provided with the boss corresponding with groove, guarantee cannot relatively rotate between contiguous block and pedestal, the center of mandrel 3 is provided with through hole 4, the axis of through hole 4 is vertical with pedestal, the lower end of mandrel 3 stretches out and forms joint flange 31, mandrel is connected with contiguous block bolt by the connecting hole on joint flange, the bottom center of joint flange 31 is provided with pit 32, described pit is communicated with through hole, joint flange has effectively increased the connection area of mandrel lower end and contiguous block, thereby more can keep the verticality of mandrel and contiguous block, pit is also the verticality in order to increase mandrel and contiguous block, the lower end of through hole 4 is provided with internal thread, in through hole, be provided with shaft screw 5, the lower end of shaft screw 5 is threaded with the lower end of through hole, shaft screw only has head sub-fraction double-screw bolt to coordinate with mandrel thread, clearance fit between most of double-screw bolt part and through hole, prevents in pretightning force testing process that moment of torsion is excessive and causes the sliding tooth of double-screw bolt part entirety and damage.
The outside, upper end of mandrel 3 is arranged with support set 6, support set 6 and mandrel 3 clearance fit, the upper end of support set 6 exceeds mandrel 3 upper ends, the upper end in contact of shaft screw 5 and support set, on the lateral surface of support set 6, post foil gauge group 7, as shown in Figure 3, foil gauge group 7 is connected with strain adapter 8, strain adapter 8 is connected with industrial computer 9, and the upper end of shaft screw 5 is provided with sleeve 10, and sleeve 10 is connected with dial torque wrench 11, in the present embodiment, foil gauge group 7 comprises four foil gauges, and four foil gauges adopt full-bridge mode to connect, and accuracy of detection is high; Support set 6 comprises support set 61 and lower support cover 62, the upper end of upper support set 61 stretches out and forms upper overturning 63, the lower end of described lower support cover 62 stretches out and forms lower flange 64, upper overturning, lower flange can increase the anti-pressure ability at support set two ends, can prevent the fail in compression of support set two ends simultaneously, simultaneously, upper support set and lower support cover self length is all much smaller than the length of single support set, therefore after being subject to larger pressure, position, intermediate portion is difficult for arching upward, thereby keeps the dependent variable that detects that foil gauge group can be stable; Foil gauge group is attached to lower support and puts, and between upper overturning 63 and lower flange 64, is arranged with elastic seal cartridge 12, and elastic seal cartridge has waterproof and dustproof effect, and foil gauge group is played a protective role.As shown in Figure 4, the lower surface of upper support set 61 is provided with annular groove 65, the upper surface of lower support cover 62 is provided with the annular boss corresponding with annular groove 66, upper support set, lower support cover pass through the spacing of annular groove 65 and annular boss 66, can keep right alignment, can not misplace, thereby while preventing from detecting, the position between upper support set, lower support cover is moved and changes testing environment at every turn.
This foil gauge group is demarcated by foil gauge caliberating device as shown in Figure 2, thereby obtain the linear relationship of pressure load and voltage, jacket casing is in shaft screw, dial torque wrench is connected with sleeve, after dial torque wrench rotates, shaft screw compresses upper support set, upper support set is passed to lower support cover pressure, lower support cover produces distortion, foil gauge group also produces deformation, the pretightning force of shaft screw and the anchorage force of support set are a pair of acting force and reacting force, the equal and opposite in direction of power, specific moment of torsion of the every rotation of dial torque wrench all can be recorded, observe magnitude of voltage corresponding on industrial computer simultaneously, foil gauge group was demarcated by the foil gauge caliberating device as shown in 2, therefore each voltage can a corresponding force value (this force value equals the pretightning force of shaft screw), thereby draw the linear relationship of moment of torsion and pretightning force, realize the detection of pretightning force, in this kind of pretightning force testing process, do not need to destroy shaft screw's self structure, can not affect shaft screw's intensity, whole structure of the detecting device is simple, detect very convenient, testing result is accurate.
A kind of foil gauge caliberating device as shown in Figure 2, comprise pedestal 1, contiguous block 2 and mandrel 3, contiguous block is connected with foundation bolt, mandrel is connected with contiguous block bolt, the center of mandrel 3 is provided with through hole 4, the axis of through hole is vertical with pedestal, the outside of mandrel is arranged with support set 6, support set and mandrel clearance fit, the upper end of support set exceeds mandrel upper end, on the lateral surface of support set 6, post foil gauge group 7, the connected mode of the foil gauge in foil gauge group is as identical in the connected mode in Fig. 1, foil gauge group is connected with strain adapter 8, strain adapter is connected with industrial computer 9, the upper end of support set 6 is provided with briquetting 13, the lower end of briquetting is provided with reference column 14, reference column stretches into formation clearance fit in through hole, the center, upper surface of briquetting 13 is provided with conical bore 15, in conical bore 15, be provided with steel ball 16, the axis conllinear of the axis of conical bore 15 and reference column 14.The pressure arm 17 that adds carrier aircraft is pressed on steel ball exerts pressure to steel ball, briquetting is directly pressed in support set, lower support puts, foil gauge group is experienced this strain, thereby output signal is through the processing of overstrain adapter, and then after the processing of the signal processing system in industrial computer, obtain corresponding voltage signal, add after specific pressure of the every loading of carrier aircraft, recording voltage value, finally draw the linear relationship of load and voltage, therefore in shaft screw's pretightning force pick-up unit, when torque spanner rotates, the magnitude of voltage showing on industrial computer directly can be processed into into corresponding pretightning force value by signal processing system, thereby draw intuitively the relation of moment of torsion and pretightning force.Foil gauge group is directly taken out briquetting after demarcating, and loads onto shaft screw and carries out pretightning force detection, and testing environment is identical.Therefore, the utlity model has in the situation that not destroying shaft screw's self structure, fast and accurately the beneficial effect of detecting core shaft bolt pretightening.
Claims (8)
1. a wheel shaft screw pretightning force pick-up unit, it is characterized in that, comprise pedestal (1), contiguous block (2) and mandrel (3), contiguous block is connected with pedestal, mandrel is connected with contiguous block, the center of mandrel (3) is provided with through hole (4), the axis of described through hole (4) is vertical with pedestal, the lower end of described through hole (4) is provided with internal thread, in through hole, be provided with shaft screw (5), the lower end of shaft screw (5) is threaded with the lower end of through hole, the outside, upper end of mandrel (3) is arranged with support set (6), described support set (6) and mandrel (3) clearance fit, the upper end of support set (6) exceeds mandrel (3) upper end, the upper end in contact of shaft screw (5) and support set, on the lateral surface of support set (6), post foil gauge group (7), foil gauge group (7) is connected with strain adapter (8), described strain adapter (8) is connected with industrial computer (9), the upper end of shaft screw (5) is provided with sleeve (10), described sleeve (10) is connected with dial torque wrench (11).
2. wheel according to claim 1 shaft screw pretightning force pick-up unit, it is characterized in that, described support set (6) comprises support set (61) and lower support cover (62), the upper end of described upper support set (61) stretches out and forms upper overturning (63), the lower end of described lower support cover (62) stretches out and forms lower flange (64), and described foil gauge group is attached to lower support and puts.
3. wheel according to claim 1 and 2 shaft screw pretightning force pick-up unit, is characterized in that, described foil gauge group (7) comprises four foil gauges, and four foil gauges adopt full-bridge modes to connect.
4. wheel according to claim 2 shaft screw pretightning force pick-up unit, is characterized in that, between described upper overturning (63) and lower flange (64), is arranged with elastic seal cartridge (12).
5. wheel according to claim 1 shaft screw pretightning force pick-up unit, it is characterized in that, the lower end of described mandrel (3) stretches out and forms joint flange (31), mandrel is connected with contiguous block bolt by the connecting hole on joint flange, the bottom center of joint flange (31) is provided with pit (32), and described pit is communicated with through hole.
6. wheel according to claim 2 shaft screw pretightning force pick-up unit, it is characterized in that, the lower surface of described upper support set (61) is provided with annular groove (65), and the upper surface of described lower support cover (62) is provided with the annular boss corresponding with annular groove (66).
7. a foil gauge caliberating device, be used for demarcating foil gauge group as described in claim 1, it is characterized in that, comprise pedestal (1), contiguous block (2) and mandrel (3), contiguous block is connected with pedestal, mandrel is connected with contiguous block, the center of mandrel (3) is provided with through hole (4), the axis of described through hole is vertical with pedestal, the outside of mandrel is arranged with support set (6), described support set and mandrel clearance fit, the upper end of support set exceeds mandrel upper end, on the lateral surface of support set (6), post foil gauge group (7), foil gauge group is connected with strain adapter (8), described strain adapter is connected with industrial computer (9), the upper end of support set (6) is provided with briquetting (13), the lower end of briquetting is provided with reference column (14), reference column stretches into formation clearance fit in through hole, the center, upper surface of briquetting (13) is provided with conical bore (15), in described conical bore (15), be provided with steel ball (16).
8. a kind of foil gauge caliberating device according to claim 7, is characterized in that, the axis of described conical bore (15) and the axis conllinear of reference column (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320645622.0U CN203561472U (en) | 2013-10-21 | 2013-10-21 | Wheel core axle bolt pretightening force detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320645622.0U CN203561472U (en) | 2013-10-21 | 2013-10-21 | Wheel core axle bolt pretightening force detection device |
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| Publication Number | Publication Date |
|---|---|
| CN203561472U true CN203561472U (en) | 2014-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320645622.0U Expired - Fee Related CN203561472U (en) | 2013-10-21 | 2013-10-21 | Wheel core axle bolt pretightening force detection device |
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| CN (1) | CN203561472U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994884A (en) * | 2014-05-14 | 2014-08-20 | 广西桂冠电力股份有限公司大化水力发电总厂 | Detection device for fastening meshing conditions of large bolts and nuts |
| CN104568281A (en) * | 2013-10-21 | 2015-04-29 | 浙江万向精工有限公司 | Vehicle wheel core shaft bolt pretightening force detection device |
| CN109489888A (en) * | 2018-12-24 | 2019-03-19 | 江苏徐工工程机械研究院有限公司 | Annular structure connecting bolt pretightning force detecting system |
| CN110907156A (en) * | 2019-12-03 | 2020-03-24 | 哈尔滨电机厂有限责任公司 | Connecting shaft tightness monitoring device for vertical hydraulic generator |
| CN113340506A (en) * | 2021-07-12 | 2021-09-03 | 哈尔滨工业大学 | Turbine pump shafting pretightning force detection device |
| CN113533082A (en) * | 2021-06-17 | 2021-10-22 | 东南大学 | Torque coefficient measuring device and torque coefficient measuring method |
| CN114593858A (en) * | 2022-03-10 | 2022-06-07 | 上海罗玛动力科技有限公司 | Portable torque analyzer |
-
2013
- 2013-10-21 CN CN201320645622.0U patent/CN203561472U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568281A (en) * | 2013-10-21 | 2015-04-29 | 浙江万向精工有限公司 | Vehicle wheel core shaft bolt pretightening force detection device |
| CN103994884A (en) * | 2014-05-14 | 2014-08-20 | 广西桂冠电力股份有限公司大化水力发电总厂 | Detection device for fastening meshing conditions of large bolts and nuts |
| CN103994884B (en) * | 2014-05-14 | 2016-07-06 | 广西桂冠电力股份有限公司大化水力发电总厂 | A kind of large-sized bolt is engaged the detecting device of situation with nut fastening |
| CN109489888A (en) * | 2018-12-24 | 2019-03-19 | 江苏徐工工程机械研究院有限公司 | Annular structure connecting bolt pretightning force detecting system |
| CN109489888B (en) * | 2018-12-24 | 2023-10-03 | 江苏徐工工程机械研究院有限公司 | Annular structure connecting bolt pretightening force detecting system |
| CN110907156A (en) * | 2019-12-03 | 2020-03-24 | 哈尔滨电机厂有限责任公司 | Connecting shaft tightness monitoring device for vertical hydraulic generator |
| CN110907156B (en) * | 2019-12-03 | 2021-08-13 | 哈尔滨电机厂有限责任公司 | Connecting shaft tightness monitoring device for vertical hydraulic generator |
| CN113533082A (en) * | 2021-06-17 | 2021-10-22 | 东南大学 | Torque coefficient measuring device and torque coefficient measuring method |
| CN113340506A (en) * | 2021-07-12 | 2021-09-03 | 哈尔滨工业大学 | Turbine pump shafting pretightning force detection device |
| CN114593858A (en) * | 2022-03-10 | 2022-06-07 | 上海罗玛动力科技有限公司 | Portable torque analyzer |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140423 Termination date: 20191021 |
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| CF01 | Termination of patent right due to non-payment of annual fee |