CN2228653Y - Portable pointer type domestic buoyancy balance - Google Patents

Abstract

The utility model discloses a portable pointer type domestic buoyancy balance, which is a domestic weighing apparatus used in daily commercial management activities. The portable pointer type domestic buoyancy balance is designed for solving the technical problems that the existing steelyard is easy to cheat; the spring balance has low weighing precision; the electronic scale has inconvenient carrying and is unable to avoid cheat, etc. The portable pointer type domestic buoyancy balance carries out weighing work through that the liquid buoyancy used as weight is a variable-value poise and the weighing force arm is a fixed-value lever mechanism. The utility model has the advantages of high weighing precision, easy identification of weighing value, rapid display speed, zero correction device, no cheat, small volume, light weight, low cost, convenient carrying, strong environmental suitability, etc.

Description

Portable needle indicator type buoyancy balance for domestic use

The utility model belongs to the weighing apparatus tool technical field in the business management activity, is a kind of weighing weighing apparatus of civil version.

Commercial weighing apparatus is known steelyard, electronic scales and spring balance.According to " using the notice of steelyard about restriction in public's trade " (Technical Supervision Bureau is sent out [1994] No. 16) that State Bureau of Technical Supervision, State Administration for Industry and Commerce have issued jointly on September 23rd, 1, steelyard will progressively be eliminated.Electronic scales still finds no weighing apparatus tool portable, civil version at present and occurs.It is not high that spring balance is then weighed precision.

Use the CD-ROM of Patent Office of the People's Republic of China data of optical disk library searching through Shandong Province Patent Administration Bureau, " patent retrieval report " portion was provided on January 9th, 1, its retrieval conclusion is: " in the patented claim of bulletin (disclosing), not having the patented claim identical with above-mentioned technology before at the bottom of in September, 1994 ".So the utility model--portable needle indicator type buoyancy balance for domestic use, but find correlation technique at present as yet.

The purpose of this utility model is: for daily business activity provide a kind of carry out weighing work the time can't practise fraud swindle, dependable performance, measurement precision height, civil version weighing apparatus tool easy to carry, with low cost.

Describe technical solution of the present utility model in detail below in conjunction with accompanying drawing.

Fig. 1: the outside drawing of portable needle indicator type buoyancy balance for domestic use.

Fig. 2: the complete section figure of portable needle indicator type buoyancy balance for domestic use.

Fig. 3: the A-A of portable needle indicator type buoyancy balance for domestic use, B-B cut-away view.

Fig. 4: the C-C cut-away view of portable needle indicator type buoyancy balance for domestic use.

Among the figure: zero bar of 1-school, 2-all become the measurement stone roller, 3-opening bearing, 4-sealing cylinder upper bracket, 5-rearing-box plate, 6-scale casing, 7-handle ring cambered axle, 8-scale dial plate, 9-table visor sealing gasket, 10-table visor, 11-school, zero lid, 12-grammes per square metre pointer, 13-load-bearing handle bar, 14-kilogram pointer, 15-handle ring, 16-scale door bolt, 17-scale door, zero cancelling of 18-school, 19-the pin of handling knob, 21-cap liner, 22-connecting plate are handled knob in 20-school zero, 23-indicator driving wheel, 24-Cross Recess Head Screw, 25-balance bob bearing pin, 26-surely cut or polish jade with an emery wheel sheet, 27-fixed stone roller pin, the shutoff of 28-counterweight, 29-surely cut or polish jade with an emery wheel spring, 30-grammes per square metre pointer accelerating pulley, 31-grammes per square metre pointer driving wheel, 32-balance bob counterweight swing pipe, 33-balance bob, the 34-cantilever cutter shaft of weighing, 35-scale shell fore shell, 36-indicator axial adjustment screw, 37-indicator axial adjustment nut, 38-grammes per square metre pointer engaged wheel, 39-indicator speed change wheel shaft, 40-indicator speed change axle bearing, 41-grammes per square metre pointer accelerating pulley pad, 42-grammes per square metre pointer axle bearing, 43-I, weigh cutter shaft supporting of III, 44-I, the cutter shaft supporting of weighing of the III cutter shaft spacer of weighing, 45-II, 46-II cutter shaft spacer of weighing, 47-preceding boxboard, 48-II cutter shaft of weighing, the recessed end holding screw of 49-interior hexagonal, 50-I, the III cutter shaft of weighing, 51-grammes per square metre pointer wheel shaft retaining ring, 52-kilogram indication needle shaft, 53-kilogram indication pinwheel, 54-grammes per square metre pointer wheel shaft, 55-kilogram pointer transition wheel, 56-cross recessed countersunk head sscrew, 57-weighing subtracts wheels 6,58-II cutter shaft adjustment cover of weighing, 59-air filtration film, 60-indicator axial adjustment spring, 61-scale shell back cover, the 62-cylinder ventilation dish of weighing, 63-gas outlet upper flange, the supporting of the 64-cantilever cutter shaft of weighing, 65-snorkel, the 66-cylinder of weighing, 67-adverse current plug, 68-gas outlet lower flange, 69-school, zero rod seal axle sleeve, the 70-potting of weighing lid, capping under 71-scale casing cylinder hole, 72-non-state the metal line of weighing, the 73-liquid of weighing, 74-taper bolt, 75-the cantilever of weighing, 76-scale colludes, and 77-scale hangs, the 78-cutter of weighing, 79-weighing subtracts wheels 1,80-weighing subtracts wheels 2,81-weigh and subtracts that wheels 4,82-weighing subtracts wheels 3,83-weighing subtracts wheels 5,84-all become measurement stone roller swing arm, 85-scale casing cylinder hole upper cover, 86-return liquid to block up.

Scale casing 6, front boxboard 47, rearing-box plate 5 are bolted and form the scale housing box Body. Two load-bearing handle bars 13 are respectively as a whole with forward and backward boxboard founding, carry The annulus that bracelet cambered axle 7 exposes load-bearing handle bar 13 and the annulus of handle ring 15 are worn Connect, thereby form the handle mechanism of weighing. Load-bearing cantilever cutter shaft 34 is by load-bearing handle bar The hole of 13 lower ends is as supporting, load-bearing cantilever 75, load-bearing cantilever cutter shaft 34, weighs Cutter 78 connection that interfixes, scale are hung 77 and are articulated with the cutter 78 of weighing, and scale colludes 76 and hangs with scale 77 articulate, and above-mentioned part has formed the hanging mechanism of weighing. The scale shell that mutually fastens Fore shell 35, the school that scale shell back cover 61 and active pin connect zero lid 11 consists of the scale table Shell. In the front of scale watchcase, fixedly be inlaid with the table visor by table visor sealing gasket 9 10; Correspondence position at front boxboard 47 table visors 10 is fixed with scale dial plate 8. The scale table The scale value of dish 8 has respectively integer value and the fractional value that is in the multiple relation.

Can freely overturn around handle ring cambered axle 7 in the annulus position of handle ring 15. Do not advancing During row weighing work, handle ring 15 can be equalled a side that is buckled in the scale watchcase, by the scale watchcase The flexible outstanding tongue piece structure that has from it compresses it. Carrying out the weighing worker When doing, it can be mentioned, or collude with hand and to carry or to be hung on a certain stay hook, this moment is whole Individual scale body will be in the free suspension state take the axis of handle ring cambered axle 7 as the axle center.

Scale colludes 76 and is placed in the back side groove of scale shell back cover 61 when flat, it is compressed from one's body the outstanding tongue piece structure of rubber-likes by scale shell back cover 61.When weighing, it is taken off, hang 77 by the opening part of scale body lower surface and scale and articulate.

By foregoing description as can be known, the power of weighing reaches the lower end of load-bearing handle bar 13 by load-bearing cantilever cutter shaft 34, and by load-bearing handle bar 13, handle ring cambered axle 7 and handle ring 15 are born, and other structures of whole scale body are not born bearing capacity when weighing.

Technical characterictic of the present utility model is:

Its power transmission levers mechanism of weighing, the gear pair of being made up of many groups of intermeshing Weighing force transmission wheels 79 and 80,82 and 81,83 and 57 constitutes.Assemble weigh the cantilever cutter shaft 34 and the cutter shaft 48,50 of weighing of each Weighing force transmission wheel, it is to be the triangle that line contacts with carrying plane with xsect that the cutter shaft of weighing supports 43,45 two ends that cooperatively interact, to reach the purpose that reduces friction.

Its stone roller of weighing, the arm of force length that is the fulcrum both sides are that stone roller mechanism is weighed in weigh all changes liquid 73 and that static balancing apparatus is arranged of sealing up for safekeeping of definite value.All become to weigh stone roller mechanism by: the cylinder body of weighing, but school zero weighing weight device, ventilation is anti-lets out device, forms but all become statical moment balance device five parts of weighing stone roller swing arm and school zero weighing weight device.

The shell of cylinder body of weighing is formed by the cylinder 66 of weighing, the potting of weighing lid 70 with the sealing cylinder upper bracket 4 that the cylinder 66 of weighing is assembled into one.The cylinder body of weighing is fixed in the scale housing box body.Be assembled with the opening bearing 3 of the no inner ring of bearing radial force in the upper end of sealing cylinder upper bracket 4.The cylinder of weighing divides upper and lower two Room, and it stores the liquid 73 of weighing in the chamber down; Be assembled with weigh cylinder ventilation dish 62 and air filtration film 59 in the space that bottom face of chamber and sealing cylinder upper bracket 4 forms on it.Be stored in the 66 times indoor liquid 73 of weighing of cylinder of weighing must have density greatly, not volatile characteristic.On the card of cylinder ventilation dish of weighing some fine through holes are arranged, the size of its fine through-hole diameter is chosen according to the capillary size of the liquid 73 of weighing, and is in the non-leakage liquid of weighing under askew, the inverted free state to guarantee the scale body.

But school zero weighing weight device by all become weigh stone roller 2, school zero bar 1, school zero handle knob 20 and school zero rod seal axle sleeve 69 form.The mating surface that all becomes the weighing apparatus stone roller 2 and the cylinder body of weighing is clearance fit.20 operating sides of being fixed in school zero bar 1 of handling knob, school zero.The middle part of school zero bar 1 is weighed stone roller 2 and be threaded engagement with all becoming, and it is clearance fit that the zero rod seal in following neck and school overlaps 69.School zero rod seal cover 69 is fixed in and all becomes the bottom of weighing stone roller 2.Handle knob 20 the time when turn school zero, school zero bar 1 can be with respect to all becoming the displacements that weighing apparatus stone roller 2 produces along axis.All become and weigh stone roller 2 and weigh cylinder 66 in carrying out the weighing course of work, all positions that can contact with the liquid 73 of weighing, the area of its each xsect separately equates.With the liquid 73 that guarantees to weigh at the 66 times indoor anchor ring areas of cylinder of weighing along keeping certain certain value under the state of axis shift forever.

Ventilation is anti-let out device by gas outlet lower flange 68, return that liquid is stifled 86, adverse current plug 67, gas outlet upper flange 63 and snorkel 65 form.Gas outlet upper flange 63 and with upper flange plate that the last chamber of the cylinder 66 of weighing interlinks be airtight being fixedly connected; Exhaust lower flange 68 and with lower flange that the following chamber of the cylinder 66 of weighing interlinks be airtight being fixedly connected; The two ends of snorkel 65 are airtight being fixedly connected with gas outlet upper flange 63 and gas outlet lower flange 68 respectively.Returning liquid stifled 86 is airtight being fixedly connected with the endoporus that gas outlet lower flange 68 is inserted into cylinder 66 1 ends of weighing, and its air hole is non-circular.Adverse current plug 67 is placed in gas outlet lower flange 68 and returns in the interior empty crotch that liquid stifled 86 forms, and the sphere diameter of adverse current plug 67 is less than the internal diameter of empty crotch in above-mentioned but greater than the through-hole diameter that returns liquid stifled 86 and gas outlet lower flange 68.The density of material of adverse current plug 67 is greater than the density of material of the liquid 73 of weighing.Because it is non-circular returning the through hole of liquid stifled 86, therefore vertically just to put and when making adverse current plug 67 be in the free-falling state at the scale body, the sphere face of adverse current plug 67 can not complete closed returns the through hole of liquid stifled 86.Under the above-mentioned state, the 66 times indoor air of cylinder of weighing are through snorkel 65 chamber to the cylinder of weighing, see through air filtration film 59 through the fine through hole of the cylinder ventilation dish 62 of weighing again and communicate with atmosphere.Because the through hole of gas outlet lower flange 68 the inner is a taper hole, so sphere face tilting or the adverse current plug 67 of free landing when being inverted will seal through hole the inner taper hole of gas outlet lower flange 68 when the scale body, the following chambers of overflowing the cylinder 66 of weighing outward with the liquid 73 that prevents to weigh; Again because the density of material of adverse current plug 67 greater than the density of material of the liquid 73 of weighing, so when the scale body during tilting or inversion, landing to the adverse current plug 67 of liquid 73 bottom surfaces of weighing can not float.When carrying out weighing work,,, thereby weighing precision can not made influence so air can not form damping because the air and the atmosphere of the 66 times chambers of cylinder of weighing lead to.

But the statical moment balance device of school zero weighing weight device is weighed the balance bob bearing pin 25 that stone roller swing arm 84 carries out movable pin joint and is formed by balance bob 33, balanced weight counterweight swing pipe 32 with all becoming.The tube wall of balance bob counterweight swing pipe 32 is provided with the counterweight hole, can put into mass to increase counterweight from its counterweight hole; Can hole to reduce counterweight according to the needs of counterweight in the bottom of balance bob 33.Balance bob 33 and 32 combinations of balance bob counterweight swing pipe are as a whole.

All become and weigh stone roller swing arm 84, I, the III of its middle part and the I axle system cutter shaft 50 of weighing is fixedly connected, the gear teeth of its Weighing force transmission side are meshing with each other with tooth bar position that all become to weigh stone roller, and its balance side connects by balance bob bearing pin 25 and the statical moment balance device pin of living.The axis of I axle system is the work fulcrum, and obviously, the profile of tooth pitch radius of power transmission side is a definite value, and the stressed radius of balance side also is a definite value.According to designing requirement, immerse a certain setting value in liquid surface of the liquid 73 of weighing slightly at the following transverse plane that all becomes measurement stone roller 2 after, by the statical moment balance device being increased weight or loss of weight is disposed, but be that fulcrum makes the purpose that reaches the static equilibrium state between school zero weighing weight device and the statical moment balance device with the axis that reaches with I axle system.

Its value of weighing indication mechanism, by the kilogram pointer 14 that is on the same axis, grammes per square metre pointer 12 and many group indicator transmission gears are formed.The driving wheel of kilogram pointer kinematic train is and I, III as the I axle system of the fulcrum indicator driving wheel 23 of cutter shaft 50 for being fixedly connected of weighing, drives to a kilogram indication pinwheel 53 from indicator driving wheel 23 through kilogram pointer transition wheel 55.Kilogram indication pinwheel 53 indicates needle shaft 52 for being fixedly connected with kilogram.The speed ratio of above-mentioned kinematic train for amplifying, when all becoming when weighing 84 swings of stone roller swing arm, kilogram pointer 14 will carry out the swing that the amplitude of oscillation has been exaggerated thereupon.The driving wheel of grammes per square metre pointer kinematic train is for indicating the grammes per square metre pointer driving wheel 31 of axle 52 for being fixedly connected with kilogram, through being grammes per square metre pointer engaged wheel 38 and the grammes per square metre pointer accelerating pulley 30 that is fixedly connected, drive to grammes per square metre pointer wheel shaft 54 with indicator speed change wheel shaft 39.Grammes per square metre pointer wheel shaft 54 is that an end has the gear other end and the tubular shaft of grammes per square metre pointer 12 for being fixedly connected.Grammes per square metre pointer wheel shaft 54 is indicated needle shaft 52 suits with clearance fit and kilogram, thereby two needle shafts are on the same axis.The kinematic train of grammes per square metre pointer is to concern the speed ratio relation of amplifying by a certain percentage with the kinematic train of kilogram pointer.

It cuts or polish jade with an emery wheel mechanism surely, by fixed stone roller pin 27, and scale door 17, scale door bolt 16 is cut or polish jade with an emery wheel sheet 26 surely and is cut or polish jade with an emery wheel spring 29 compositions surely.Fixed stone roller pin 27 is fixedly connected with balance bob counterweight swing pipe 32, cuts or polish jade with an emery wheel sheet 26 surely and is fixed on the scale door 17, cuts or polish jade with an emery wheel flat spring 29 surely and is assembled in and decides between stone roller sheet 26 and the scale door 17, and scale door bolt 16 is pinned at scale door 17 on the scale appearance surface shell.Open scale door 17, fixed stone roller pin 27 free displacements up and down are with unrestricted; The scale door 17 that closes, by cut or polish jade with an emery wheel flat spring 29 surely, cutting or polish jade with an emery wheel sheet 26 surely will be fixed stone roller pin 27 position of being fixed under the non-weighing state, thereby the statical moment balance device can not upper and lowerly be swung.

On scale casing 6, preceding boxboard 47, rearing-box plate 5, be provided with the counterweight hole of vertical direction, by counterweight to guarantee that scale is totally when freely hanging state, its Y, Z two axial lines are in the vertical state, thereby but make school zero weighing weight device be in desirable no Frotteurism between each vertical surface of contact of Shi Yuqi weighing.

Between the constituent material for the long-term accuracy that guarantees weighing, weigh liquid 73 and its each parts that can contact, should there be any chemical reaction and physical reactions.

Carrying out weighing when work, be hooked on scale by the thing of weighing and collude 76 lower end and collude, the power of weighing hangs 77 by scale, the cutter 78 of weighing, and cantilever 75 bears by weighing.The edge of a knife that is fixed in the cutter 78 of weighing on the cantilever 75 of weighing is the arm of force of weighing to the vertical range of the axis of the cantilever cutter shaft 34 of weighing, and the arm of force of weighing is a certain value.Subtract wheels 79 from weighing of being fixedly connected of the cantilever cutter shaft 34 of weighing with VI axle system, the overall ratio ratio that subtracts wheels 57 to I, III with I axle system weighing of weighing that cutter shaft 50 is fixedly connected is greater than 1, therefore, claim to collude 76 small perpendicular displacement, but can be by weighing stone roller swing arm 84 for all becoming of being fixedly connected and make school zero weighing weight device do bigger perpendicular displacement with I, the III cutter shaft 50 of weighing.The group number of the gear pair of power transmission levers mechanism is an odd number owing to weigh, so when claiming to collude 76 upper and lower displacements, but the school zero also synchronous thereupon upper and lower displacement of weighing weight device.When weighing, according to the size that is claimed weight of heavy, but school zero weighing weight device to move down distance different.When but zero weighing weight device moves down in the school, weigh depth distance in the liquid of its immersion is squeezed will be along with the degree of depth of its immersion and liquid level the time and is raise and strengthen, in this process, but the 73 pairs of schools of liquid zero of weighing are weighed the buoyancy of weight device and are also strengthened thereupon, when passing through all changes, this buoyancy weighs the moment that this arm of force of profile of tooth pitch radius of the power transmission side of the definite value of cutting or polish jade with an emery wheel swing arm 84 forms, with the moment that is formed by the arm of force of weighing of thing of weighing by definite value, when reaching balance through weighing the amplification of power transmission levers mechanism, weighing work is finished.

When all become weighing stone roller swing arm 84 and swing because of the work of weighing, be scaled gravimetric value by the sizes values of indication mechanism of weighing with buoyancy, show by the scale on indicator and the scale dial plate 8.

But because the deadweight of school zero weighing weight device and the deadweight of statical moment balance device, respectively with the axis of I axle system between moment equate that stream oriented device is under the static equilibrium state, so but the symmetrical value of the deadweight of school zero weighing weight device do not exert an influence.

When carrying out weighing work, scale door 17 must be opened.Do not carrying out weighing when work, the scale door 17 that should close, but preventing school zero weighing weight device because of the overall chatter of scale, and prevent to aggravate to weigh the fluctuation of liquid 73 because of above-mentioned trembling.

When because weigh liquid 73 volatilization to some extent under normal phase service condition, or when causing the volume change of the liquid 73 of weighing, will influence the zero-bit accuracy of weighing indication mechanism because of the variation of natural conditions such as expand with heat and contract with cold.At this moment, weighing work carry out preceding, open and claim door 17 earlier, turn school zero handles knob 20 again, makes the bottom of handsome zero bar 1 weigh stone roller 2 displacements with respect to all becoming, the size of above-mentioned displacement, the buoyancy of 73 pairs of schools of liquid, zero weighing weight device but change that can trace is weighed.The variation of above-mentioned micro-buoyancy, but school zero weighing weight device under non-weighing state, will be caused with respect to the microdisplacement of cylinder body on axis direction of weighing, thus reach the purpose of the demarcation zero-bit of proofreading and correct weighing value indication mechanism by kinematic train.

The immersion of school zero bar 1 bottom in the liquid 73 of weighing, the area of each xsect of its outside surface is from the zero equal variable to a certain particular value, begins and cumulative purpose thereby realize making school zero bar can accomplish from null value zero the time in the school.

Because the arm of force when weighing is a definite value, stone roller heavy (being buoyancy) is a variable, but the school is zero when external force influences the buoyancy value, so all fraudulent meanses are all invalid.

Portable needle indicator type buoyancy balance for domestic use described in the utility model is compared with known weighing apparatus tool, has the following advantages:

1, weighing is accurate, and its phase time error amount can realize 1 ‰-0.25 ‰.

2, buoyancy weighing transmission is stable, and no chatter phenomenon shows that the speed of weighing value is fast.

3, easy to carry, be convenient to recognize and read the weighing value.

4, have zero device, when working environment changes or set up that the school was zero at any time when weighing attached.

5, known all fraudulent meanses to existing weighing apparatus tool are all invalid to flotation balance.

6, environmental suitability is strong :-35 ℃ to 200 ℃, high humility, dust, wind-force and general vibration all do not influence its weighing precision.

7, compact conformation, volume is little, and it is few to consume material, low cost of manufacture.

8, with high content of technology, be suitable for technical know-how.

Fig. 1, Fig. 2, Fig. 3, Fig. 4 are most preferred embodiment of the present utility model:

Scale casing, preceding boxboard, rearing-box plate are die casting aluminum component, fixing by 6 sunk screws 56, form scale housing box body.Two load-bearing handle bars are whole with forward and backward boxboard founding respectively, and handle ring cambered axle is worn the annulus position of two load-bearing handle bars and handle ring and connected, thereby forms the handle mechanism of weighing.The cantilever cutter shaft of weighing is a fulcrum with the supporting of the load-bearing cantilever cutter shaft in the hole that is flush-mounted in load-bearing handle bar lower end 64, the cantilever of weighing is fixedly connected itself and load-bearing cantilever cutter shaft by taper bolt 74, the cutter of weighing is an interference fit with the cantilever of weighing, scale hangs freely to be hung on the cutter of weighing, scale colludes and is mounted on scale and hangs on, thereby has formed the hanging mechanism of weighing.Claim shell fore shell, scale shell back cover to fasten mutually, school zero lid connects with the scale casing pin by school zero cancelling 18, and above-mentioned part consists of the scale watchcase, and all selects for use plastic material to make.Have the value of weighing display aperture in the front of scale watchcase, and envelope there is the table visor of organic glass, is bonded with the scale dial plate, between scale dial plate and table visor, be inlaid with the table visor sealing gasket of elastomeric material at the correspondence position of preceding boxboard.

Its power transmission levers mechanism of weighing is made of three groups of Weighing force transmission wheels 79,80 and 82,81 and 83,57.The two ends that are assembled with weigh the cantilever cutter shaft and the cutter shaft of weighing of each Weighing force transmission wheel respectively are the triangle knife-edge, contact for line with separately the cutter shaft supporting 43,45 of weighing.

Its stone roller of weighing is weighed stone roller mechanism for all becoming, and it is by the cylinder body of weighing, but school zero weighing weight device, and ventilation is anti-lets out device, forms but all become statical moment balance device five parts of weighing stone roller swing arm and school zero weighing weight device.

The shell of cylinder body of weighing is a plastic material, and by the bonding cylinder of weighing mutually, the potting of weighing lid 70 and sealing cylinder upper bracket are formed.In the upper end endoporus of sealing cylinder upper bracket, be assembled with the opening bearing.The cylinder of weighing divides upper and lower two Room, and it stores the liquid of weighing in the chamber down, and chamber is embedded with weigh cylinder ventilation dish and air filtration film on it.The diameter of the fine through hole on the ventilation dish of weighing is not more than 0.2.The cylinder body of weighing is fixed in the scale housing box body.

But school zero weighing weight device is weighed stone roller, school zero bar by all becoming, school zero bar is handled knob and school zero rod seal axle sleeve is formed.Weigh chamber under the cylinder internal diameter and all become and form an anchor ring between the external diameter of weighing stone roller, the area of this anchor ring equals all to become the cross-sectional area of weighing the stone roller outside cylinder.The lower end of school zero bar be conical, and wherein neck is weighed stone roller and be threaded engagement with all becoming, its upper end by pin 19 high-ranking officers that handle knob zero handle knob fix with it.The external diameter of school zero rod seal cover is interference fit with the endoporus that all becomes measurement stone roller lower end, and its endoporus and school zero bar is a clearance fit.

Ventilation is anti-lets out device, by bonding with the upper and lower ring flange of the cylinder of weighing respectively gas outlet upper flange, gas outlet lower flange, respectively with the bonding snorkel of the upper and lower flange of gas outlet and return the stifled and adverse current plug of liquid and form.Returning the stifled inner via hole of liquid is triangular tooth.The adverse current plug is a ball, its sphere diameter is greater than the gas outlet lower flange and return the stifled inner via hole of liquid, less than the big footpath of the internal taper hole of gas outlet lower flange.

But the statical moment balance device of school zero weighing weight device, balance bob by plumbous matter, with the balance bob founding be balance bob counterweight swing pipe porose on the pipe arm of one, with balance bob counterweight swing pipe be interference fit counterweight shutoff 28 and with all become to weigh the balance bob bearing pin that stone roller swing arm pin connects and form.

All become to weigh stone roller swing arm and I, the III of the I axle system cutter shaft of weighing and be connected into the key of interference, the fan tooth of its side of weighing with all become the tooth bar position engagement of weighing stone roller, its balance side connects with alive pin of statical moment balance device.On I, III weigh cutter shaft, be assembled with simultaneously as weigh the weighing of terminal of power of transmission and subtract wheels 6 and as the indicator driving wheel at the top of the value of weighing indication mechanism.

The value of weighing indication mechanism reaches kilogram indication pinwheel by the indicator driving wheel through kilogram pointer transition wheel, drives the rotation of kilogram pointer by kilogram indication needle shaft again.On kilogram indication needle shaft, be assembled with the grammes per square metre pointer driving wheel that is fixedly connected simultaneously and with the grammes per square metre pointer wheel shaft of clearance fit suit.Grammes per square metre pointer driving wheel reaches grammes per square metre pointer wheel shaft through being assembled in grammes per square metre pointer engaged wheel and the grammes per square metre pointer accelerating pulley on the same indicator speed change wheel shaft, thereby drives the rotation of grammes per square metre pointer.The supporting of kilogram indication needle shaft and indicator speed change wheel shaft all has indicator axial adjustment screw 36 and indicator axial adjustment spring 60, to adjust its sensitivity.

Surely cut or polish jade with an emery wheel mechanism, by the scale door, insert and to decide the stone roller sheet in the scale door inwall hole slot, after cutting or polish jade with an emery wheel sheet surely, be sleeved on deciding the stone roller spring and form on the protrusion right cylinder on the scale door with the stone roller pin of deciding that thread connection is fixed on the balance bob counterweight swing pipe.Above-mentioned scale door mechanism is connected in its pin of living on the scale shell by the scale pin.

Four jiaos of the scale housing box body of forming at scale casing, preceding boxboard and rearing-box plate are provided with the counterweight hole, guarantee scale totally when freely hanging by irritating lead or brill, spot-facing that its Y, Z two axial lines are in the vertical state.

Obviously, utilize the weighing apparatus tool of other designed patterns of principle of the present utility model, all belong to abuse.

Claims (13)

1, a kind ofly be used for the portable needle indicator type buoyancy balance for domestic use that weighing work is carried out in the business management activity, have:

(1) the scale housing box body of forming by scale casing (6), preceding boxboard (47), rearing-box plate (5),

(2) by being combined as the load-bearing handle bar (13) of integrated member and the load-bearing handle mechanism that handle ring (15), handle ring cambered axle (7) are formed with forward and backward boxboard respectively,

(3) by with the lower end of load-bearing handle bar (13) the cantilever cutter shaft (34) of weighing as supporting, with the cantilever of weighing (75), the cutter of weighing (78) that are fixedly connected with the cantilever cutter shaft (34) of weighing, hang (77) with the scale that articulates with the cutter of weighing (78), with hang the scale that (77) articulate with scale and collude the hanging mechanism of weighing that (76) are formed

(4) by fastening be scale shell fore shell (35), scale shell back cover (61), school zero lid (11) of one, with the scale dial plate (8) that is fixed on the preceding boxboard (47), with be assembled in the scale shell fore shell (35) the scale watchcase of forming with the fixing table visor (10) of table visor sealing gasket (9)

Technical characterictic of the present utility model is:

Its power transmission levers mechanism of weighing, form by one or more groups pitch wheel is secondary, from the cantilever cutter shaft (34) of weighing that bears the power of weighing, to I, III as the I axle system of the fulcrum of the weighing cutter shaft (50) of weighing, the weigh geometric configuration of xsect at cutter shaft two ends of each gear pair is to be the triangle knife-edge that line contacts with its carrying plane

Its stone roller of weighing is that arm of force length is that stone roller mechanism is weighed in weigh all changes liquid (73) and that static balancing apparatus is arranged of sealing up for safekeeping of definite value, has:

(1) by having upper and lower two Room; Its lower chamber stores the cylinder of weighing (66) of the liquid of weighing (73); Sealing cylinder upper bracket (4) with the opening bearing (3) of the no inner ring that bearing radial force is housed that is assembled into one with the cylinder of weighing (66); The cylinder body of weighing of weigh cylinder vent disc (62) and air-filtering membrane (59) composition with some fine through holes in the space that forms with the bottom face of the upper chamber that is assembled in the cylinder of weighing (66) and sealing cylinder upper bracket (4); The cylinder body of weighing is fixed in the scale housing box body

(2) be that stone roller (2) is weighed in all changes of clearance fit by be assembled in the cylinder body of weighing mating surface with the cylinder body of weighing along axis, be fixed with school zero handle knob (20) with its operating side, its middle part with all become to weigh stone roller (2) and be threaded engagement, its other end neck and school zero rod seal axle sleeve (69) is school zero bar (1) of clearance fit, all become the school zero rod seal axle sleeve of weighing in the stone roller (2) (69) but the school zero weighing weight device of forming with being fixed in

(3) by with the cylinder of weighing (66) down the ring flange that interlinks of chamber to be that airtight its accessibke porosity that is fixedly connected is inboard be the gas outlet lower flange (68) of taper hole, with with gas outlet lower flange (68) be the non-circular liquid stifled (86) that returns for airtight its through hole that is fixedly connected, with be placed in gas outlet lower flange (68) and return in the empty crotch that liquid stifled (86) forms, its diameter is less than the big footpath of interior empty crotch, but adverse current plug (67) greater than the through-hole diameter of above-mentioned two parts, with going up the ring flange that the chamber interlinks with the cylinder of weighing (66) is the airtight gas outlet upper flange (63) with air hole that is fixedly connected, respectively with gas outlet upper flange (63), the anti-device of letting out of ventilation that gas outlet lower flange (68) is formed for the airtight snorkel that is fixedly connected (65)

(4) its arm of force length is definite value, and its middle part and I, III as the I axle of the fulcrum system cutter shaft (50) of weighing is fixedly connected, and its Weighing force transmission side is weighed stone roller and weighed for all changes of tooth engagement and cut or polish jade with an emery wheel swing arm (84) with all becoming,

(5) by balance bob (33), with be combined as the unitarily formed balance bob counterweight swing pipe (32) that is provided with the counterweight hole with balance bob (33), with with balance bob counterweight swing pipe (32) with become to weigh all that stone roller swing arm (84) is lived balance bob bearing pin (25) that pin connects but the statical moment balance device of the zero weighing weight device in school formed

Its value of weighing indication mechanism, by kilogram pointer (14), with have the grammes per square metre pointer (12) of same rotation with kilogram pointer (14), form with many groups indicator driving gear pair, above-mentioned many group indicator driving gear pairs, its main driving wheel is indicator driving wheel (23), indicator driving wheel (23) and I as the I axle of fulcrum system, 11I weighs cutter shaft (50) for being fixedly connected, its terminal is the grammes per square metre pointer wheel shaft (54) of indicating needle shaft (52) coaxial cable with kilogram, it cuts or polish jade with an emery wheel mechanism surely, decide stone roller pin (27) by what be fixedly connected with balanced weight counterweight swing pipe (32), scale door (17), scale door bolt (16) and be fixed in and decide stone roller sheet (26) on the scale door (17), and be assembled in the stone roller spring of deciding between stone roller sheet (26) and the scale door (17) (29) of deciding and form.

2, portable needle indicator type buoyancy balance for domestic use according to claim 1, its technical characterictic is: the group number of the gear pair of its power transmission levers mechanism of weighing is an odd number.

3, portable needle indicator type buoyancy balance for domestic use according to claim 1, its technical characterictic is: the gear train assembly of its power transmission levers mechanism of weighing subtracts overall ratio ratio that wheels 1 (79) to weighing of I axle system subtract wheels 6 (57) greater than 1 from weighing of VI axle system.

4, portable needle indicator type buoyancy balance for domestic use according to claim 1, its technical characterictic is: liquid of weighing (73) that it is weighed in cylinder body, self have density greatly, not volatile characteristic.

5, portable needle indicator type buoyancy balance for domestic use according to claim 1, its technical characterictic is: the non-leakage liquid of weighing of fine through hole on the cylinder ventilation dish (62) of weighing in its cylinder body of weighing.

6, portable needle indicator type buoyancy balance for domestic use according to claim 1, its technical characterictic is: the following chamber of the cylinder of weighing (66) of the cylinder body of weighing, its area of each xsect that holds the internal diameter of cylinder at the liquid position of weighing equates.

7, portable needle indicator type buoyancy balance for domestic use according to claim 1, its technical characterictic is: but stone roller (2) is weighed in all changes of school zero weighing weight device, and it can immerse the position in the liquid of weighing (73), and the area of each xsect of outside surface equates.

8, portable needle indicator type buoyancy balance for domestic use according to claim 1, its technical characterictic is: but school zero bar (1) of school zero weighing weight device, the weigh outside surface cross-sectional area of the end in the liquid (73) of its immersion, from zero to a certain particular value be equal variable.

9, portable needle indicator type buoyancy balance for domestic use according to claim 1, its technical characterictic is: the anti-density of material of the density of material of the adverse current plug (67) in the device greater than the liquid of weighing (73) of letting out of its ventilation.

10, portable needle indicator type buoyancy balance for domestic use according to claim 1, its technical characterictic is: but weigh between weight device and the statical moment balance device in its school zero, axis with I axle system is a fulcrum, and the quality sum total separately of stream oriented device equates the statical moment of fulcrum.

11, portable needle indicator type buoyancy balance for domestic use according to claim 1, its technical characterictic is: the transmission gear system of its value of weighing indication mechanism, the overall ratio ratio from indicator driving wheel (23) to grammes per square metre pointer wheel shaft (54) is greater than 1.

12, portable needle indicator type buoyancy balance for domestic use according to claim 1, its technical characterictic is: the scale casing (6) of its scale housing box body, preceding boxboard (47), rearing-box plate (5), all have scale after the assembling of guaranteeing totally when freely hanging, make Y, Z two axial lines be in the counterweight hole of vertical state.

13, portable needle indicator type buoyancy balance for domestic use according to claim 1, its technical characterictic is: all parts that can contact with the liquid of weighing (73), no any chemical reaction and the physical reactions that can cause their volumes, mass change between the material of its surface of contact and the liquid of weighing (73).

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