CN207779613U - Lever mechanics Standard Machine - Google Patents
Lever mechanics Standard Machine Download PDFInfo
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- CN207779613U CN207779613U CN201721584511.8U CN201721584511U CN207779613U CN 207779613 U CN207779613 U CN 207779613U CN 201721584511 U CN201721584511 U CN 201721584511U CN 207779613 U CN207779613 U CN 207779613U
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- lever
- circle arc
- arc support
- support face
- strut
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Abstract
The utility model is related to a kind of lever mechanics Standard Machines, including lever, the accessory connection structure for being connect with corresponding lever connector is provided on lever, the accessory connection structure includes the strut that upper end is provided with rotational support structure, strut lower end is provided with strut circle arc support face, the lever circle arc support face that cooperation is in rolling contact with strut circle arc support face is provided on lever, the axis in lever circle arc support face, the axis in strut circle arc support face and the axis of rotational support structure are in same perpendicular, the radius of strut circle arc support is more than the radius in lever circle arc support face.The utility model, which provides one kind, can reduce the moment of resistance between lever connector and lever, while can reduce the lever mechanics Standard Machine of cost again.
Description
Technical field
The utility model is related to the lever mechanics Standard Machines in metering field.
Background technology
Currently, in entire force value verification system, lever plays an important role, and force standard machines can be divided into two classes：First
Class is to generate the fixed standard of force value.This kind of standard is to be divided into net weight type, lever, fluid pressure type and superposition by structure
Formula；Second class is to transmit the various portable standards of force value, and this standard can be divided into percentage tabular form, water by its measuring principle
The dynamometers such as silver-colored box, optical profile type, laser type, strain-type, piezomagnetic, inductance type, condenser type, type vibration wire.
Mechanics Standard Machine using the power that counterweight generates as gauge load, after lever mechanism appropriate amplification force value or
Torque value is added on tested dynamometer.A kind of lever of mechanics Standard Machine " mechanics as disclosed in Chinese patent CN201210102Y
The lever that Standard Machine is used for ", the lever include pedestal and hold the lever being supported on pedestal by blade, knife.When detection, in thick stick
Counterweight is connected on bar and accredited device, counterweight and accredited device are all properly termed as lever connector respectively, is examined in high-precision
During fixed, the connection structure of counterweight, accredited device and lever is most important, will produce certain resistance for the connection structure
Torque, the moment of resistance can influence final calibration accuracy, therefore be required for the moment of resistance at this that can reach most in traditional sense
It is small, it just can guarantee precision.Cooperation position for lever and pedestal is also in this way, blade, knife in traditional technology hold and connect out
After now, occur the advanced bearings such as air-bearing, oil float bearing, magnetic bearing in succession to reduce the moment of resistance, more is
Air-bearing, but the price of this class bearing is often more expensive, causes the cost of mechanics Standard Machine higher.
Utility model content
The purpose of this utility model is to provide one kind can reducing the moment of resistance between lever connector and lever, while again
The lever mechanics Standard Machine of cost can be reduced.
In order to solve the above technical problems, the technical solution of the utility model is as follows：
Lever mechanics Standard Machine, including lever are provided with for matching with what corresponding lever connector was connect on lever
Part connection structure, the accessory connection structure include the strut that upper end is provided with rotational support structure, and strut lower end is provided with branch
Bar circle arc support face is provided with the lever circle arc support face that cooperation is in rolling contact with strut circle arc support face, lever circle on lever
The axis of the axis of arc supporting surface, the axis in strut circle arc support face and rotational support structure is in same perpendicular, branch
The radius of bar circle arc support is more than the radius in lever circle arc support face.
The accessory connection structure is counterweight connection structure and/or tested device connection structure.
The rotational support structure is for realizing the connection shaft being connected with connector.
The lever include the body extended in left-right direction and be set to body end with lever circular arc
The lever shaft that supporting surface is coaxially set, lever shaft constitute T-shaped structure with body, and lever mechanics Standard Machine further includes using
In coordinating with the lever shaft block position limiting structure is moved to limit the lever that lever moves left and right.
Every one end of lever shaft is both provided with two spaced apart rolling bearings, and lever movement position limiting structure includes being located at
Left block on the left of one of rolling bearing and the right block on the right side of another rolling bearing, each block and respective shaft
It is line contact between holding, the contact line and the axis in lever circle arc support face between block and corresponding shaft bearing are in sustained height.
The beneficial effects of the utility model are：Assuming that lever connector（Lever connector is counterweight or tested device）Weight
Amount is mg, and the radius of gyration of rotational support structure is R3, and the tangential friction force at rotational support structure is F1, strut circle arc support
The radius in face is R2, and the radius in lever circle arc support face is R1, and strut circle arc support face is F2, thick stick by the tangential friction force of lever
Bar circle arc support face is F0 by the tangential friction force of strut.F1=μm g, μ indicate that coefficient of rolling friction, mg indicate the weight of counterweight,
F0 and F2 reaction force each other, F1 with the directions F2 on the contrary, size is identical, and F1*R3=F2*R2, so F0=F2=F1*R3/R2,
Moment of resistance T0=F0*R1=F1*R3*R1/R2 that lever circle arc support face position generates, and standard resistance square T in the prior art
=F1*R3, it can be seen that the ratio of R1/R2 also known as subtracts moment ratio, has decisive role to the moment of resistance, due to R1 in the utility model
Less than R2, therefore the utility model has achieved the purpose that reduce the moment of resistance between lever and lever connector.
Description of the drawings
Fig. 1 is the structural schematic diagram of one embodiment of the utility model；
Fig. 2 is the vertical view of Fig. 1
Fig. 3 is the left view of Fig. 1；
Fig. 4 is the force analysis figure at accessory connection structure in Fig. 1.
Specific implementation mode
The implementation of lever mechanics Standard Machine is for example shown in Fig. 1 ~ 4：Including pedestal and the lever being supported on pedestal, lever
Including body 3 and it is set to the accessory connection structure for being connect with counterweight 1 of body right end.Body right end
It is provided with the lever shaft 28 that axis extends along the longitudinal direction, bar bar axis is the two-part structure of split settings, lever shaft and lever
Ontology together forms T-shaped structure, and there are two rolling bearings 25 for arranged for interval along the longitudinal direction on each section of lever shaft, often
Corresponding a pair of of the block of a lever shaft, one of block is the left block 27 on the left of block respective rotary bearings, another
Block is right block 22 of the block on the right side of another rolling bearing, rolling bearing and block constitute for lever shaft block
Cooperation is to limit the Stop structure that lever moves left and right.Supporting cam wheel, the top of supporting cam wheel are provided between two lever shafts
Portion is convex lever circle arc support face 26, and lever circle arc support face 26 is coaxially set with lever shaft.Accessory connection structure packet
The strut 21 that upper end is provided with rotational support structure is included, rotates what support construction was rotatably assorted for one with strut in the present embodiment
Shaft 20 is connected, the lower end of strut 21 is provided with down convex strut circle arc support face 24, and strut circle arc support face 24 is justified with lever
Arc supports 26 faces to be in rolling contact cooperation, the axis of rotational support structure, the pivot center and lever circular arc in strut circle arc support face
The pivot center of supporting surface is in same perpendicular, and the radius in strut circle arc support face 24 is more than lever circle arc support face 26
Radius, the radius in strut circle arc support face is 100 times of the radius in lever circle arc support face in the present embodiment.Block with it is right
Answer between rolling bearing is line contact relation, the axis of contact line and lever circle arc support face between block and respective rotary bearings
Line is in sustained height, and such block can cross the active force of rolling bearing in the axis in lever circle arc support face, not will produce volume
Outer moment values.
Pedestal includes base supports plate 11, the base supports axis 6 being rotatably assorted with base supports plate, base supports plate 11 with
Also the fit structure that similar lever circular arc so far face and strut circle arc support face are used between lever, position at this is reduced to reach
The purpose of the moment of resistance is no longer described in detail its specific structure at this.The expression of figure middle term 9 is set to circular arc branch on the left end on lever
Support face, item 7 indicate the support plate circle arc support face for being set to base supports plate upper end, support plate circle arc support face and circle on left end
The contact of arc supporting surface rolls cooperation, the axis of base supports axis, the axis in support plate circle arc support face, circle arc support face on left end
The same perpendicular of axis in, the left end of lever is provided with the torque output shaft 13 that axis extends along the longitudinal direction, the torsion
Square output shaft is coaxially set with circle arc support face on corresponding left end.The expression of figure middle term 4 is coaxially set with torque output shaft
Limit shaft.
In use, torque sensor to be examined and determine is connected on torque output shaft, counterweight is connected in connection shaft,
To realize the calibrating to torque sensor, the block of two pairs of cooperations can prevent lever from moving left and right, while not generate additional
Moment values.To ensure the precision of verification result, the moment of resistance at lever circle arc support face should be minimized.In the utility model
Force analysis it is as shown in Figure 4：The weight for defining counterweight is mg, and the rotation support shaft radius of gyration is R3, at rotation support shaft
Tangential friction force is F1, and the radius in strut circle arc support face is R2, and the radius in lever circle arc support face is R1, strut circle arc support
Face is F2 by the tangential friction force of lever, and lever circle arc support face is F0 by the tangential friction force of strut；F is indicated suffered by lever
Pressure, that is, mg.F3 indicates support force of the lever to strut in figure；F4 tables connect pressure of the shaft to strut.
F1=μ F=μm g, μ indicate coefficient of rolling friction, and F0 and F2 reaction force each other, the directions F1 and F2 are on the contrary, size phase
Together, and F1*R3=F2*R2, so F0=F2=F1*R3/R2, moment of resistance T0=F0*R1 that lever circle arc support face position generates=
F1*R3*R1/R2=standard resistance in the prior art square T=F1*R3, it can be seen that the ratio of R1/R2 also known as subtracts moment ratio.Assuming that
In the present embodiment, R1=3mm, R3=30mm, R2=300mm, T：T0=100:1.Rotation support shaft undertakes main by weight, and R3 is meeting
Under strength conditions, can do as best one can it is small, such as arrive blade in the prior art, knife forwards dynamic support construction.It determines to reduce the moment of resistance
Key be R1, R2 ratio.
In the other embodiments of the utility model：Lever shaft, rolling bearing and block can not be set；Lever circular arc branch
Support face can also be the circle arc support face of fovea superior, and strut circle arc support face is convex circle arc support face at this time；Rotational support knot
Structure can also be supported hole；Strut circle arc support face can also be recessed circle arc support face, and lever circle arc support face is at this time
Under convex circle arc support face；Ratio between R1 and R2 can be selected as needed, for example, R2 can be 50 times of R1,
150 times or it is other be more than 1 arbitrary multiple；Counterweight may not be a part for this mechanics Standard Machine, and consumer can be with autogamy
Counterweight；This mechanics Standard Machine may not be to be examined and determine for torque sensor, setting torque output shaft is not required at this time, in thick stick
The one end of bar far from utility model is provided with the connection structure for being connect with force snesor, which can connect with accessory
Binding structure is identical, can also be different, when the connection structure is using in the present embodiment when subtracting moment ratio structure, between counterweight and lever
It can also use and subtract moment ratio structure, such as only simply hang over counterweight on lever.
Claims (5)
1. lever mechanics Standard Machine, including lever, it is provided with the accessory for being connect with corresponding lever connector on lever and connects
Binding structure, it is characterised in that：The accessory connection structure includes the strut that upper end is provided with rotational support structure, and strut lower end is set
It is equipped with strut circle arc support face, the lever circle arc support face for being in rolling contact cooperation with strut circle arc support face is provided on lever,
The axis of the axis in lever circle arc support face, the axis in strut circle arc support face and rotational support structure is in same perpendicular
Interior, the radius of strut circle arc support is more than the radius in lever circle arc support face.
2. lever mechanics Standard Machine according to claim 1, it is characterised in that：The accessory connection structure connects for counterweight
Binding structure and/or tested device connection structure.
3. lever mechanics Standard Machine according to claim 1, it is characterised in that：The rotational support structure is for reality
The connection shaft being now connected with connector.
4. the lever mechanics Standard Machine according to claim 1 ~ 3 any one, it is characterised in that：The lever includes edge
The body of left and right directions extension and the lever being coaxially set with lever circle arc support face for being set to body end
Axis, lever shaft constitute T-shaped structure with body, and lever mechanics Standard Machine further includes for coordinating with the lever shaft block
Position limiting structure is moved to limit the lever that lever moves left and right.
5. lever mechanics Standard Machine according to claim 4, it is characterised in that：Every one end of lever shaft is both provided with two
A spaced apart rolling bearing, it includes left block and the position being located in one of on the left of rolling bearing that lever, which moves position limiting structure,
Right block on the right side of another rolling bearing is that line contacts between each block and corresponding shaft bearing, block and corresponding shaft bearing
Between the axis in contact line and lever circle arc support face be in sustained height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721584511.8U CN207779613U (en) | 2017-11-23 | 2017-11-23 | Lever mechanics Standard Machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721584511.8U CN207779613U (en) | 2017-11-23 | 2017-11-23 | Lever mechanics Standard Machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207779613U true CN207779613U (en) | 2018-08-28 |
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ID=63233704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721584511.8U Active CN207779613U (en) | 2017-11-23 | 2017-11-23 | Lever mechanics Standard Machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764470A (en) * | 2017-11-23 | 2018-03-06 | 郑州东辰科技有限公司 | A kind of lever mechanics Standard Machine |
-
2017
- 2017-11-23 CN CN201721584511.8U patent/CN207779613U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764470A (en) * | 2017-11-23 | 2018-03-06 | 郑州东辰科技有限公司 | A kind of lever mechanics Standard Machine |
| CN107764470B (en) * | 2017-11-23 | 2024-02-23 | 郑州东辰科技有限公司 | Lever type mechanical standard machine |
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