CN207423137U - A kind of cam measuring device - Google Patents
A kind of cam measuring device Download PDFInfo
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- CN207423137U CN207423137U CN201721399097.3U CN201721399097U CN207423137U CN 207423137 U CN207423137 U CN 207423137U CN 201721399097 U CN201721399097 U CN 201721399097U CN 207423137 U CN207423137 U CN 207423137U
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Abstract
The utility model embodiment discloses a kind of cam measuring device, and when being measured using the cam measuring device in the utility model embodiment to cam to be measured, first cam to be measured is mounted on clamping device, connects driving mechanism and cam to be measured.It brings into operation, driving mechanism drives cam to be measured at the uniform velocity to rotate, the uniform speed rotation of cam to be measured is transformed into linear motion by transmission mechanism, the displacement of displacement measurement mechanism detection of straight lines movement simultaneously generates displacement signal, and controller receives the displacement signal according to predeterminated frequency and ultimately generates as lifting curve.Cam measuring device in the utility model embodiment is compared in the prior art, the lifting curve of cam is obtained by the displacement for the linear motion for directly measuring transmission mechanism, the angle of cam need not be measured, so as to eliminate the accumulated error that lifting curve is generated with angle automatching process.
Description
Technical field
The utility model is related to cam field of measuring technique, more specifically to a kind of cam measuring device.
Background technology
The performance parameter of high-pressure pump determines by flow accuracy, flow repeatability, pressure fluctuation etc., wherein, high pressure pump pressure
The index of power pulsation is most important to high-pressure pump, and in order to ensure that the flow of high pressure constant flow pump is constant, the field is to the lift of cam
The phase requirements of curve precision and cam are very high.
In order to improve the precision of cam, it usually needs cam is measured to obtain lifting curve and phase difference.One
As cam curve measuring method there are two types of type, the first is measurement cam contour shape by various modes, as optics is thrown
Shadow, three coordinate scanning surveys.This method can not accurately measure the lifting curve of cam, and machined surface profile can only be carried out pair
Than.Second is by being indexed to cam, with reference to the lifting curve of various measurement straight-line displacement instrument measurement cams, is such as taken turns
Wide degree instrument scanning and the Cam Detection frock with designs such as amesdial, laser range finders.Existing this method passes through manually or certainly
Angle as defined in dynamic driving cam rotation measures lift, then matches lift and angular relationship, forms lifting curve, the party
Method is commonly used to measure the lift after certain angle, and the lifting curve continuity measured is not high, and when lift and angle automatching is accumulated
Error is larger.
Therefore, the measurement accuracy of cam how is improved, becomes the technical issues of those skilled in the art are urgently to be resolved hurrily.
Utility model content
In view of this, technical problem to be solved in the utility model is how to improve the measurement accuracy of cam, for this purpose, this
Utility model provides a kind of cam measuring device.
To achieve the above object, the utility model provides following technical solution：
A kind of cam measuring device, including：
For installing the clamping device of cam to be measured；
For driving the driving mechanism that the cam to be measured at the uniform velocity rotates；
For being in contact with the cam face to be measured, and the rotary motion of the cam to be measured is converted into moving along a straight line
Transmission mechanism, the transmission mechanism have output terminal；
For detecting the displacement of the output terminal, and generate the displacement measurement mechanism of displacement signal；And
Institute's displacement signal is received according to predeterminated frequency and generates the controller of the lifting curve of the cam to be measured.
Preferably, in above-mentioned cam measuring device, the transmission mechanism includes：
Pedestal has pilot hole on the pedestal；
It is arranged in the pilot hole and can be along pilot hole guide rod in axial sliding, the guide rod is away from described
Output terminal of the one end of cam to be measured as the transmission mechanism；And
The elastic component being arranged on the guide rod, after the cam to be measured is mounted on the clamping device, the bullet
Property part can drive the guide rod, and the other end of the guide rod and the cam to be measured are in close contact.
Preferably, in above-mentioned cam measuring device, one end that the guide rod is in contact with the cam to be measured is set
Rolling member, the guide rod are in close contact by the rolling member and the cam to be measured.
Preferably, in above-mentioned cam measuring device, the direction of rotation of the rolling member and the cam rotation side to be measured
To opposite.
Preferably, in above-mentioned cam measuring device, the rolling member is bearing or universal wheel.
Preferably, in above-mentioned cam measuring device, guide sleeve is additionally provided in the pilot hole.
Preferably, in above-mentioned cam measuring device, the guide part is an integral structure or split structure.
Preferably, in above-mentioned cam measuring device, the guide sleeve and the guide rod alternative one are provided with guiding
Slot, another be provided with the matched lead of the guide groove, under the cooperation of the guide groove and the lead,
The guide sleeve limits the guide rod only being capable of sliding axially along the pilot hole.
Preferably, in above-mentioned cam measuring device, the guide sleeve is linear bearing.
Preferably, in above-mentioned cam measuring device, the output terminal, which further includes, is arranged on the guide rod away from described
The plunger of one end of cam, one end of the plunger offset with the guide rod, and the other end of the plunger stretches out the pedestal.
Preferably, in above-mentioned cam measuring device, the transmission mechanism is multiple, and each transmission mechanism corresponds to one
A cam to be measured and a displacement measurement mechanism, the displacement measurement mechanism are mounted on by fixed seat on the pedestal.
Preferably, in above-mentioned cam measuring device, the clamping device includes two support plates being oppositely arranged, described
It is provided with to install the mounting hole of the cam to be measured in support plate.
Preferably, in above-mentioned cam measuring device, the support plate is an integral structure with the pedestal
Preferably, in above-mentioned cam measuring device, the displacement measurement mechanism is optical grating length gage.
Preferably, in above-mentioned cam measuring device, the output terminal of the displacement measurement mechanism and the transmission mechanism is firm
Property connection.
Preferably, in above-mentioned cam measuring device, the driving mechanism is motor, hydraulic motor or air pressure motor.
Preferably, in above-mentioned cam measuring device, when the driving mechanism is motor, the cam measuring device is also
Including battery.
Preferably, in above-mentioned cam measuring device, the cam measuring device further includes mounting bracket, the clamping machine
Structure, the driving mechanism, the transmission mechanism and the displacement measurement mechanism are arranged in the mounting bracket.
Preferably, in above-mentioned cam measuring device, the transmission mechanism is the transmission mechanism of high-pressure pump.
Preferably, in above-mentioned cam measuring device, the cam to be measured is the cam of high-pressure pump.
It can be seen from the above technical scheme that using the cam measuring device in the utility model embodiment to be measured
When cam measures, first cam to be measured is mounted on clamping device, connects driving mechanism and cam to be measured.It brings into operation,
Driving mechanism drives cam to be measured at the uniform velocity to rotate, and the uniform speed rotation of cam to be measured is transformed into linear motion by transmission mechanism,
The displacement of displacement measurement mechanism detection of straight lines movement simultaneously generates displacement signal, and controller receives the displacement signal according to predeterminated frequency
It ultimately generates as lifting curve.Cam measuring device in the utility model embodiment is compared in the prior art, by direct
The displacement of the linear motion of transmission mechanism is measured to obtain the lifting curve of cam, the angle of cam need not be measured, eliminated
The accumulated error that lifting curve is generated with angle automatching process, so as to improve the measurement accuracy of cam.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
A kind of structure diagram for cam measuring device that Fig. 1 is provided by the utility model embodiment；
The structure diagram for another cam measuring device that Fig. 2 is provided by the utility model embodiment；
A kind of cam measuring device main structure diagram that Fig. 3 is provided by the utility model embodiment；
A kind of cam measuring device dimensional structure diagram that Fig. 4 is provided by the utility model embodiment；
A kind of structure diagram for transmission mechanism that Fig. 5 is provided by the utility model embodiment；
The structure diagram for another transmission mechanism that Fig. 6 is provided by the utility model embodiment.
Wherein, 100 it is driving mechanism, 200 be clamping device, 300 be transmission mechanism, 400 is displacement measurement mechanism, 500
In order to control device, 600 be cam to be measured, 700 be battery, 800 be stent, 301 be pedestal, 302 be guide rod, 3021 be guiding
Portion, 3022 be mounting portion, 303 be elastic component, 304 be rolling member, 305 be guide sleeve, 306 be plunger.
Specific embodiment
The core of the utility model is to provide a kind of cam measuring device, improves the measurement accuracy of cam.
In addition, embodiments illustrated below does not play any restriction effect to the utility model content recorded in claim.
In addition, the full content of the composition represented by example below is not limited to the solution as the utility model recorded in claim
Necessary to scheme.
It please refers to Fig.1 to Fig. 6, the utility model cam measuring device, including：
For installing the clamping device 200 of cam 600 to be measured；
For driving the driving mechanism 100 that cam 600 to be measured at the uniform velocity rotates；
For being in contact with 600 surface of cam to be measured, and the rotary motion of cam 600 to be measured is converted into linear motion
Transmission mechanism 300, transmission mechanism 300 have output terminal；
For the displacement of detection output, and generate the displacement measurement mechanism 400 of displacement signal；And
Displacement signal is received according to predeterminated frequency and generates the controller 500 of the lifting curve of cam 600 to be measured.
It, first will be to be measured when being measured using the cam measuring device in the utility model embodiment to cam 600 to be measured
Cam 600 is mounted on clamping device 200, connects driving mechanism 100 and cam to be measured 600.It brings into operation, driving mechanism 100
Cam 600 to be measured is driven at the uniform velocity to rotate, the uniform speed rotation of cam 600 to be measured is transformed into linear motion by transmission mechanism 300,
The displacement of 400 detection of straight lines of displacement measurement mechanism movement simultaneously generates displacement signal, and controller 500 receives the position according to predeterminated frequency
Shifting signal is ultimately generated as lifting curve.Cam measuring device in the utility model embodiment is led to compared in the prior art
The displacement of the directly linear motion of measurement transmission mechanism 300 is crossed to obtain the lifting curve of cam, the angle of cam need not be measured
Degree eliminates the accumulated error that lifting curve is generated with angle automatching process, so as to improve the measurement accuracy of cam.
Further, since the cam measuring device in the utility model embodiment can continuously survey cam 600 to be measured
Amount, therefore, it is possible to reach the continuous measurement request of phase autoclave constant flow pump cam high-precision.
It should be noted that the above-mentioned effect of driving mechanism 100 is that cam 600 to be measured is driven to be uniform speed rotation, due to
Cam 600 to be measured is uniform speed rotation, therefore, the lifting curve generated by the linear motion for measuring transmission mechanism 300
For continuous cycle movement, and the angle rotated in each cycle is 0-2 π, so as to be carried for that need not carry out angular surveying
For basis.It is many that the structure of the driving mechanism 100 of the torque of uniform speed rotation can be provided, for example, hydraulic motor, air pressure motor,
Or motor.It when being driven using motor, is arranged in the cam measuring device and is separately provided power supply, power supply is accumulator 700.Or
Person's motor can direct external power supply.
The driving mechanism 100 and the connection of cam 600 to be measured by shaft coupling can be attached or pass through retarder
It is attached.It does not specifically describe herein.
The effect of transmission mechanism 300 is that the rotary motion of cam 600 to be measured is transformed into the linear motion of itself, therefore,
It is all to realize that the structure for converting rotational motion to linear motion is within the protection scope of the present utility model.
Above-mentioned transmission mechanism 300 is the transmission mechanism of high-pressure pump in the utility model, and above-mentioned cam to be measured is high-pressure pump
Therefore cam, when cam to be measured is the cam of high-pressure pump, can simulate real cam and be worth to true feedback, reduce and pass
Dynamic error.
A kind of concrete structure of transmission mechanism 300 is described in the utility model embodiment, refer to Fig. 5 and Fig. 6, the biography
Motivation structure 300 includes pedestal 301, guide rod 302 and elastic component 303.Wherein, there is pilot hole on pedestal 301；Guide rod 302
It is arranged in pilot hole and can slide axially along pilot hole, the one end of guide rod 302 away from cam 600 to be measured is as transmission mechanism
300 output terminal；Elastic component 303 is arranged on guide rod 302, after cam 600 to be measured is mounted on clamping device 200, elasticity
Part 303 can drive guide rod 302, and the other end of guide rod 302 is in close contact with cam 600 to be measured.It needs to illustrate
, the other component with top base 301 for transmission mechanism 300 provides support.
When being measured to cam 600 to be measured, cam 600 to be measured is at the uniform velocity revolved under the driving of driving mechanism 100
Turn, in rotary course, guide rod 302 is in close contact under the action of elastic component 303 with cam 600 to be measured always, so as to drive
Guide rod 302 moves along a straight line, and one end that guide rod 302 is connected with displacement measurement mechanism 400 can directly react guide rod
Displacement in 302 linear motions.
In order to reduce frictional force and accuracy of detection when guide rod 302 is in close contact with cam 600 to be measured, guide rod
302 one end being in contact with cam 600 to be measured set rolling member 304, and guide rod 302 passes through rolling member 304 and cam 600 to be measured
It is in close contact.
Guide rod 302 is rubbed during being in close contact due to guide rod 302 and cam 600 to be measured so as to influence measurement essence
Therefore degree, when setting rolling member 304 in one end of guide rod 302, can reduce frictional force, so as to improve measurement accuracy.
Further, the direction of rotation of rolling member 304 is opposite with 600 direction of rotation of cam to be measured.Such setting so that rub
It wipes power and is reduced to minimum.It can realize that the structure being in rolling contact has very much, in the utility model embodiment, in order to ensure to measure
Precision rolling member 304 is bearing, since bearing is standard component, error is relatively low in measurement process.Or above-mentioned rolling
Moving part 304 is Universal wheel structure, and the rolling member 304 is that direction of rotation is multiple at this time, therefore, even if being oriented in measurement process
Bar 302 rotates, and the influence for measurement structure will not be very big.
Above-mentioned guide rod 302 is an integral structure or split structure, and guide rod 302 is an integral structure in Fig. 5, figure
It is split structure in 6, wherein the guide rod 302 includes mounting portion 3022 and guide part 3021, and wherein mounting portion 3022 is used for
Rolling member 304 is installed, for guide part 3021 for being connected with mounting portion 3022, connection mode can be interference fit or screw thread
Connection.
Guide sleeve 305 is additionally provided in another embodiment of the utility model, in pilot hole, since guide sleeve 305 is rapid wear
Part, therefore set guide sleeve 305 that the higher material of hardness may be employed on pedestal 301, reduce the replacement time of guide sleeve 305
Number, therefore, can be with further, since guide sleeve 305 only needs to replace guide sleeve 305 without replacing entire pedestal 301 after wearing
Reduce measurement cost.
Guide sleeve 305 and 302 alternative one of guide rod are provided with guide groove, another is provided with is engaged with guide groove
Lead, under the cooperation of guide groove and lead, 305 restricted guidance bar 302 of guide sleeve only can be along the axial direction of pilot hole
It slides.Wherein, can carry out sliding relatively between guide sleeve 305 and guide rod 302, while the guide sleeve 305 can be limited and led
It is rotated to bar 302 around own axes.
In order to reduce the frictional force that guide rod 302 is slided in guide sleeve 305, which is linear bearing.
In order to simplify processing, the output terminal of transmission mechanism 300, which further includes, is arranged on the one end of guide rod 302 away from cam
Plunger 306, one end and the guide rod 302 of plunger 306 offset, and the other end of plunger 306 stretches out pedestal 301.Guide rod 302 is done
During linear motion, plunger 306 is driven also to move in a straight line, therefore, just can directly be reacted and led by the displacement for measuring plunger 306
Displacement to bar 302.
Above-mentioned transmission mechanism 300 can be one or more, and clamping device 200 can clamp one or more cams to be measured
600, displacement measurement mechanism 400 is one or more, and a transmission mechanism 300 corresponds to a cam 600 to be measured, one corresponding
Displacement measurement mechanism 400.
Referring to Fig. 1, when transmission mechanism 300 is one, which corresponds to a cam 600 and one to be measured
A displacement measurement mechanism 400 is only capable of realizing the measurement to a cam 600 to be measured；Fig. 2 to Fig. 4 is referred to, works as transmission mechanism
300 for it is multiple when, each transmission mechanism 300 corresponds to a cam 600 to be measured and a displacement measurement mechanism 400, realizes to more
The measurement of a cam to be measured 600.
Transmission mechanism 300 is multiple, can finally obtain the lifting curve of multiple cams to be measured 600, to be measured convex with two
Exemplified by wheel 600, it is illustrated that there are two middle transmission mechanisms 300, and there are two cams 600 to be measured, and there are two displacement measurement mechanisms 400.Figure
Only tool is there are two cam 600 to be measured in showing, the utility model can also measure the cam to be measured 600 of other quantity, such as three,
Four etc..
The effect of clamping device 200 is for installing cam 600 to be measured, and in the utility model embodiment, clamping device 200 wraps
Two support plates being oppositely arranged are included, are provided with that the mounting hole of cam 600 to be measured is installed in support plate.In order to facilitate processing
Support plate is an integral structure with pedestal 301.
Displacement measurement mechanism 400 is length gauge, displacement sensor or optical grating length gage, and optical grating length gage has measurement essence
High characteristic is spent, therefore, displacement measurement mechanism 400 can significantly improve survey using optical grating length gage in the utility model embodiment
Accuracy of measurement.In order to ensure the stability in measurement process, the output terminal rigidity of the displacement measurement mechanism 400 and transmission mechanism 300
Connection.
Cam measuring device further includes mounting bracket 800, clamping device 200, driving mechanism 100, transmission mechanism 300 and position
Shift measurement mechanism 400 is arranged in mounting bracket 800.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or new using this practicality
Type.A variety of modifications of these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (20)
1. a kind of cam measuring device, which is characterized in that including：
For installing the clamping device of cam to be measured (600) (200)；
For driving the driving mechanism (100) that the cam to be measured (600) at the uniform velocity rotates；
For being in contact with cam (600) surface to be measured, and the rotary motion of the cam (600) to be measured is converted into directly
The transmission mechanism (300) of line movement, the transmission mechanism (300) have output terminal；
For detecting the displacement of the output terminal, and generate the displacement measurement mechanism (400) of displacement signal；And
Institute's displacement signal is received according to predeterminated frequency and generates the controller of the lifting curve of the cam to be measured (600)
(500)。
2. cam measuring device as described in claim 1, which is characterized in that the transmission mechanism (300) includes：
Pedestal (301) has pilot hole on the pedestal (301)；
It is arranged in the pilot hole and can be along pilot hole guide rod (302) in axial sliding, the guide rod (302) is remote
Output terminal of the one end as the transmission mechanism (300) from the cam (600) to be measured；And
The elastic component (303) being arranged on the guide rod (302), when the cam (600) to be measured is mounted on the clamping machine
After structure (200), the elastic component (303) can drive the guide rod (302), and cause the another of the guide rod (302)
End is in close contact with the cam (600) to be measured.
3. cam measuring device as claimed in claim 2, which is characterized in that the guide rod (302) and the cam to be measured
(600) one end for being in contact sets rolling member (304), the guide rod (302) by the rolling member (304) with it is described to be measured
Cam (600) is in close contact.
4. cam measuring device as claimed in claim 3, which is characterized in that the direction of rotation of the rolling member (304) and institute
It is opposite to state cam to be measured (600) direction of rotation.
5. cam measuring device as claimed in claim 4, which is characterized in that the rolling member (304) is bearing or universal wheel.
6. cam measuring device as claimed in claim 2, which is characterized in that the guide part is an integral structure or split type
Structure.
7. cam measuring device as claimed in claim 2, which is characterized in that be additionally provided with guide sleeve in the pilot hole
(305)。
8. cam measuring device as claimed in claim 7, which is characterized in that the guide sleeve (305) and the guide rod
(302) alternative one is provided with guide groove, another be provided with the matched lead of the guide groove, in the guiding
Under the cooperation of slot and the lead, the guide sleeve (305) limits the guide rod (302) only can be along the pilot hole
It slides axially.
9. cam measuring device as claimed in claim 7, which is characterized in that the guide sleeve (305) is linear bearing.
10. cam measuring device as claimed in claim 2, which is characterized in that the output terminal, which further includes, is arranged on described lead
To the plunger (306) of the one end of bar (302) away from the cam, one end and the guide rod (302) phase of the plunger (306)
It supports, the other end of the plunger (306) stretches out the pedestal (301).
11. cam measuring device as claimed in claim 2, which is characterized in that the transmission mechanism (300) is multiple, each
The corresponding cam (600) to be measured of the transmission mechanism (300) and a displacement measurement mechanism (400), institute's displacement measurement machine
Structure (400) is mounted on by fixed seat on the pedestal (301).
12. cam measuring device as claimed in claim 2, which is characterized in that the clamping device (200) includes two relatively
The support plate of setting is provided with to install the mounting hole of the cam to be measured (600) in the support plate.
13. cam measuring device as claimed in claim 12, which is characterized in that the support plate is with the pedestal (301)
Integral structure.
14. cam measuring device as described in claim 1, which is characterized in that the displacement measurement mechanism (400) is long for grating
Degree meter.
15. cam measuring device as described in claim 1, which is characterized in that the displacement measurement mechanism (400) and the biography
The output terminal rigid connection of motivation structure (300).
16. cam measuring device as described in claim 1, which is characterized in that the driving mechanism (100) is motor, hydraulic pressure
Motor or air pressure motor.
17. cam measuring device as claimed in claim 16, which is characterized in that when the driving mechanism (100) is motor,
The cam measuring device further includes battery.
18. cam measuring device as described in claim 1, which is characterized in that the cam measuring device further includes installation branch
Frame (800), the clamping device (200), the driving mechanism (100), the transmission mechanism (300) and institute's displacement measurement machine
Structure (400) is arranged in the mounting bracket (800).
19. cam measuring device as described in claim 1, which is characterized in that the transmission mechanism (300) is the biography of high-pressure pump
Motivation structure.
20. the cam measuring device as any one of claim 1 to 19, which is characterized in that the cam to be measured is height
The cam of press pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721399097.3U CN207423137U (en) | 2017-10-26 | 2017-10-26 | A kind of cam measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721399097.3U CN207423137U (en) | 2017-10-26 | 2017-10-26 | A kind of cam measuring device |
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| CN207423137U true CN207423137U (en) | 2018-05-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708606A (en) * | 2019-01-21 | 2019-05-03 | 北京工业大学 | A kind of multiple mounted cam precision measurement and detection device and method based on kinematic parameter characterization |
| CN110091165A (en) * | 2019-06-10 | 2019-08-06 | 中车大连机车车辆有限公司 | A kind of assembled camshaft assembling phase angle adjusts device and method |
-
2017
- 2017-10-26 CN CN201721399097.3U patent/CN207423137U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708606A (en) * | 2019-01-21 | 2019-05-03 | 北京工业大学 | A kind of multiple mounted cam precision measurement and detection device and method based on kinematic parameter characterization |
| CN109708606B (en) * | 2019-01-21 | 2020-10-16 | 北京工业大学 | Composite cam machining precision detection device and method based on motion parameter representation |
| CN110091165A (en) * | 2019-06-10 | 2019-08-06 | 中车大连机车车辆有限公司 | A kind of assembled camshaft assembling phase angle adjusts device and method |
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