CN208206475U - A kind of ball-screw accelerating lifetime testing device - Google Patents
A kind of ball-screw accelerating lifetime testing device Download PDFInfo
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- CN208206475U CN208206475U CN201820687582.9U CN201820687582U CN208206475U CN 208206475 U CN208206475 U CN 208206475U CN 201820687582 U CN201820687582 U CN 201820687582U CN 208206475 U CN208206475 U CN 208206475U
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Abstract
The utility model provides a kind of ball-screw accelerating lifetime testing device, and the test device includes position signal detection device, driving device (1), ball-screw, workbench (5), shifting block (8), shifting chute (9), adjustable damping device (10), executes control unit (11)；Load dynamic regulation can be achieved, adapt to the test of different types of ball-screw, the working condition of real simulation ball-screw, so that test result is more accurate, simultaneously, by improving accelerated factor, it is substantially shorter the ball-screw life test test period, obtains the lifetime data of product whole life cycle in a relatively short period of time.
Description
Technical field
The present invention relates to ball-screw field more particularly to a kind of ball-screw accelerating lifetime testing devices.
Background technique
Ball-screw be convert rotary motion to linear motion, or by transform linear motion be rotary motion component,
It is that the fields such as equipment, engineering, automobile, space flight are widely applied, has the characteristics that high-precision, invertibity and efficient, with very little
Frictional resistance.Ball-screw is made of lead screw screw rod, feed screw nut, steel ball, reverser, dust excluder etc., there is interior circulation and outer
Recycle two kinds of steel ball field cycling profiles.
The main failure mode of ball-screw is fatigue rupture, i.e. the fatigue equivalent of ball, lead screw raceway, nut rolling way.
Currently, for detecting the detection device of ball-screw service life (fatigue), there is that structure is complicated, time test period length, adaptability
Defect lower, that actual loaded can not be simulated and be unable to dynamic regulation load, such as prior art patent document
CN103411773A、A-CN103543010A、A-CN103712793A、A-CN202075120U。
Summary of the invention
The technical problem to be solved by the present invention is to overcome above-mentioned defects in the prior art, provide a kind of for ball-screw
Accelerating lifetime testing device verifies the life situations of ball-screw within the shorter test period.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows:
A kind of ball-screw accelerating lifetime testing device, which is characterized in that the test device includes position signal detection
Device, driving device (1), ball-screw kinematic pair, workbench (5), shifting block (8), shifting chute (9), adjustable damping device (10),
It executes control unit (11)；Wherein, the ball-screw kinematic pair includes lead screw screw rod (6) and feed screw nut (7), the ball
Guide screw movement pair is installed in the workbench (5), the control signal end and execution control unit (11) of the driving device (1)
Connection, the signal output end of the position signal detection device are connect with control unit (11) are executed, the position signal detection
The signal input part of device is connect with feed screw nut (7), the control signal end of the adjustable damping device (10) and executes control
The upper end of unit (11) connection, the feed screw nut (7) connects the position signal detection device, the feed screw nut (7)
Lower end is fixedly connected the shifting block (8), and the shifting block (8) connect with the shifting chute (9), the shifting chute (9) and it is described can
Mode damper (10) connection.
Further, the position signal detection device includes: angular transducer (3) and link mechanism (4)；The connecting rod
Mechanism (4) includes upper revolving part (41) and lower revolving part (42), and the upper revolving part (41) and the lower revolving part (42) can turn
Dynamic connection；Wherein, the upper revolving part (41) is fan-shaped, fan-shaped large end face and the angular transducer (3) connection, described
Lower revolving part (42) is U-shaped, and one end offers U-shaped notch, and the U-shaped notch is connected to table on the feed screw nut (7)
On the pillar (71) that face is equipped with.
Further, the position signal detection device is infra-red ray detection device or ultrasonic sensor.
Further, include storage unit in the execution control unit (11), prestore in the storage unit load and
The mapping relations of position signal or time signal.
Further, the test device further includes storage unit, the storage unit and the execution control unit
(11) it is electrically connected, the mapping relations of load and position signal or time signal is prestored in the storage unit.
Compared with the prior art, the advantages of the present invention are as follows:
Test device structure of the invention is simple, it can be achieved that load dynamic regulation, adapts to different types of ball-screw
Test, the working condition of real simulation ball-screw so that test result is more accurate, meanwhile, by improving accelerated factor,
It is substantially shorter the ball-screw life test test period, obtains the service life number of product whole life cycle in a relatively short period of time
According to.
Detailed description of the invention
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.Wherein:
Fig. 1 is the structural schematic diagram of test device of the present invention.
Fig. 2 is the structural schematic diagram of position signal detection device of the present invention.
Fig. 3 is the mapping relations of present invention load and position signal.
Each label indicates in figure:
1, driving device；2, deep groove ball bearing；3, angular transducer；4, link mechanism；41, upper revolving part；42, lower rotation
Part；5, workbench；6, lead screw screw rod；7, feed screw nut；71, pillar；8, shifting block；9, shifting chute；10, adjustable damping device；11,
Execute control unit.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of creative work.Therefore, below to attached
The detailed description of the embodiment of the present invention provided in figure is not intended to limit the range of claimed invention, but only
Indicate selected embodiment of the invention.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two original parts.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
As shown in Figure 1, the mechanism for testing of the present embodiment, including driving device 1, position signal detection device, workbench 5,
Lead screw screw rod 6, shifting block 8, shifting chute 9, adjustable damping device 10, executes control unit 11 at feed screw nut 7.
In the present embodiment, driving device 1 is preferably motor, and the control signal end of motor 1 connect with controller 11 is executed, holds
Line control unit 11 controls the revolving speed of motor 1 and steering, the output end of motor 1 are connect with lead screw screw rod 6, lead screw screw rod 6 and lead screw
Nut 7 constitutes ball-screw kinematic pair.Ball-screw kinematic pair belongs to the common knowledge of this field, and this will not be repeated here.
The signal output end of position signal detection device is connect with control unit 11 is executed, and position signal detection device is real-time
The position signal of feed screw nut 7 is passed to and executes control unit 11 by ground.Wherein, referring to fig. 2, the position signal detection device packet
It includes: angular transducer 3 and link mechanism 4.The link mechanism 4 includes upper revolving part 41 and lower revolving part 42, upper revolving part 41
With the rotatably connection of lower revolving part 42, such as can be hinged, wherein upper revolving part 41 is fan-shaped, fan-shaped large end face and
Angular transducer 3 connects, and lower revolving part 42 is U-shaped, and one end offers U-shaped notch, and the U-shaped notch is connected to lead screw spiral shell
On the pillar 71 that female 7 upper surfaces are equipped with.When work, 7 horizontal movement of feed screw nut, pillar 71 drives link mechanism 4 to rotate, thus
Horizontal displacement signal is converted into rotational angle signal, angular transducer obtains angle signal, further according to the geometry of link mechanism
Conversion relation obtains the displacement signal of feed screw nut 7.
Due to cost considerations, although the position letter constituted in above-described embodiment using angular transducer 3 and link mechanism 4
Number detection device obtains the position signal of feed screw nut 7, it would however also be possible to employ other position detecting devices replace,
Such as infra-red ray detection device, ultrasonic sensor etc..
The control signal end of adjustable damping device 10 is connect with controller 11 is executed, and is executed and is prestored load F in controller 11
With the mapping relations (referring to Fig. 3) of position signal, this kind of mapping relations are obtained by testing, and can flexibly be adjusted according to actual needs
Section, to adapt to the life test of different types of ball-screw.As shown in figure 3, illustratively giving 4 accelerated factor K1-
The corresponding mapping relations curve of K4, wherein K1=0.8, K2=1.0, K3=1.2, K4=1.5, K2 represent negative under proper testing
F2 is carried, K3 represents it and loads 1.2 times that F3 is normal load F2, i.e. it is normal that F3=1.2*F2, K4, which represent it and load F4,
Loading 1.5 times of F2, i.e. F3=1.5*F2, K1 represent it and load 0.8 times, i.e. F1=0.8*F2 that F1 is normal load F2, because
This, corresponding biggish accelerated factor is biggish load.It executes the position signal based on the received of controller 11, searches and prestore
The mapping relations of load and position signal obtain real-time demand and load, and then the load of dynamic regulation adjustable damping device 10
Size and direction.
In addition, the position signal and time signal due to feed screw nut 8 are into certain functional relation, it may be considered that
It is that, in design map relationship, the mapping relations of load and time signal also can be set, i.e. execution controller 11 can also root
Carry out the size and Orientation of dynamic regulation load according to time signal.
Above-mentioned mapping relations can be pre-stored in the storage unit for executing control unit 11, in addition, storage unit can also be with
It is independent electric component, and realizes communication by being electrically connected and executing control unit 11.
Ball-screw is installed in workbench 5, and the both ends of lead screw screw rod 6 are rotatably mounted on by deep groove ball bearing 2
In workbench 5, the wherein output axis connection of one end and motor 1, the upper end link position signal supervisory instrument of feed screw nut 7, silk
The lower end of thick stick nut 7 is fixedly connected with shifting block 8, and shifting block 8 is connect with shifting chute 9, and shifting chute 9 is connect with adjustable damping device 10.Institute
The horizontal reciprocating movement under the drive of adjustable damping device 10 of shifting chute 9 is stated, according to the control for executing control unit 11, so that moving
Dynamic slot 9 exports corresponding load in different positions in real time.
The course of work: selected accelerated factor K executes control unit 11 and controls the work of motor 1, and motor 1 drives lead screw screw rod 6
Rotation, lead screw screw rod 6 drive 7 horizontal reciprocating movement of feed screw nut, wherein execute control unit 11 and obtain in real time by position signal
The position signal or time signal for the feed screw nut 7 that detection device detects, according to the load and position signal that prestore or when
Between signal mapping relations, dynamic regulation adjustable damping device 10 load size and direction.
Test device of the invention can realize load dynamic regulation, adapt to the test of different types of ball-screw, very
The working condition of real simulation ball-screw, so that test result is more accurate, meanwhile, by improving accelerated factor, can contract significantly
The short ball-screw life test test period, the lifetime data of product whole life cycle is obtained in a relatively short period of time.
Although by reference to preferred embodiment, invention has been described, the case where not departing from the scope of the present invention
Under, various improvement can be carried out to it and can replace component therein with equivalent.Especially, as long as there is no structures to rush
Prominent, items technical characteristic mentioned in the various embodiments can be combined in any way.The invention is not limited to texts
Disclosed in specific embodiment, but include all technical solutions falling within the scope of the claims.
Claims (5)
1. a kind of ball-screw accelerating lifetime testing device, which is characterized in that the test device includes position signal detection dress
It sets, driving device (1), ball-screw kinematic pair, workbench (5), shifting block (8), shifting chute (9), adjustable damping device (10), hold
Row control unit (11)；Wherein, the ball-screw kinematic pair includes lead screw screw rod (6) and feed screw nut (7), the ball wire
Thick stick kinematic pair is installed in the workbench (5), and the control signal end of the driving device (1) and execution control unit (11) are even
It connects, the signal output end of the position signal detection device is connect with control unit (11) are executed, the position signal detection dress
The signal input part set is connect with feed screw nut (7), and the control signal end of the adjustable damping device (10) executes control with described
Unit (11) connection processed, the upper end of the feed screw nut (7) connect the position signal detection device, the feed screw nut (7)
Lower end be fixedly connected the shifting block (8), the shifting block (8) connect with the shifting chute (9), the shifting chute (9) with it is described
Adjustable damping device (10) connection.
2. ball-screw accelerating lifetime testing device according to claim 1, which is characterized in that the position signal detection
Device includes: angular transducer (3) and link mechanism (4)；The link mechanism (4) includes upper revolving part (41) and lower revolving part
(42), the upper revolving part (41) and the lower revolving part (42) rotatably connect；Wherein, the upper revolving part (41) is in fan
Shape, fan-shaped large end face and the angular transducer (3) connection, the lower revolving part (42) is U-shaped, and one end offers U
Type notch, the U-shaped notch are connected on the pillar (71) that the feed screw nut (7) upper surface is equipped with.
3. ball-screw accelerating lifetime testing device according to claim 1, which is characterized in that the position signal detection
Device is infra-red ray detection device or ultrasonic sensor.
4. ball-screw accelerating lifetime testing device according to any one of claim 1-3, which is characterized in that described to hold
Include storage unit in row control unit (11), the mapping of load and position signal or time signal is prestored in the storage unit
Relationship.
5. ball-screw accelerating lifetime testing device according to any one of claim 1-3, which is characterized in that the survey
It further includes storage unit that trial assembly, which is set, the storage unit and the execution control unit (11) electrical connection, in the storage unit
Prestore the mapping relations of load and position signal or time signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820687582.9U CN208206475U (en) | 2018-05-09 | 2018-05-09 | A kind of ball-screw accelerating lifetime testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820687582.9U CN208206475U (en) | 2018-05-09 | 2018-05-09 | A kind of ball-screw accelerating lifetime testing device |
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| CN208206475U true CN208206475U (en) | 2018-12-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303252A (en) * | 2018-05-09 | 2018-07-20 | 济宁市微科特机械制造有限责任公司 | A kind of ball-screw accelerating lifetime testing device |
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2018
- 2018-05-09 CN CN201820687582.9U patent/CN208206475U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303252A (en) * | 2018-05-09 | 2018-07-20 | 济宁市微科特机械制造有限责任公司 | A kind of ball-screw accelerating lifetime testing device |
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