CN87201923U - Two-slidingweight pull rod type precision steelyard - Google Patents

Abstract

The utility model relates to a double sliding weight pull rod type precision steelyard. The sliding weight can slide along the cross beam of a pivot shaft. The double sliding weight pull rod type precision steelyard comprises a tubular metallic cross beam whose back surface is provided with weight graduations, a rod-shaped metal core weight whose back surface is provided with weight graduations, an annular metallic poise whose back surface is provided with a level indicator, and a handle belt and a weighing device which are fixed on the same end of the cross beam; the rod-shaped metal core forms a sliding fit with the inner surface of the cross beam, and the annular metallic poise forms a sliding fit with the outer surface of the cross beam. The double sliding weight pull rod type precision steelyard can improve the weighing accuracy as well as reduces the cost, and is assembled into a whole but can not disengage. The double sliding weight pull rod type precision steelyard is especially suitable for being made into the small-size portable type.

Description

Two-slidingweight pull rod type precision steelyard

The utility model relates to a kind of scale thallium can be along the steelyard of pivoted beam slip, particularly a kind of rod-pulling type two-slidingweight precision steelyard.

The frequent mechanical weighing utensil that uses of people generally comprises following several at present: (1) platform balance (comprising balance): this is a kind of precision weighing utensil that uses on the platform that is placed on, its weighing precision height, but complex structure, volume is big and heaviness is unsuitable for carrying, and price is higher; (2) spring balance: can carry, but weighing precision is low, error is big, can not satisfy request for utilization; (3) steelyard: this is to use more weighing utensil at present general family and the market, it comprises a wooden arm beam of steelyard that has weight scale, be fixed in a handle band and a weigher (steelyard hook or the scale pan) of the same end of the described arm beam of steelyard, and scale thallium that is suspending in midair that can on the arm beam of steelyard, move, this scale moderate cost, precision also can, just the oversize inconvenience of the arm beam of steelyard is carried, and the wooden arm beam of steelyard fractures easily.

The rod-pulling type two-slidingweight precision steelyard that the purpose of this utility model is to provide a kind of scale thallium to slide along pivoted beam, when improving weighing precision, reduce cost, and whole weighing-appliance is combined as a whole, separation can not come off, can make miniature portable according to request for utilization in addition, or medium-sized and large-scale.

The purpose of this utility model realizes in the following manner.

A kind of scale thallium can comprise that one has the crossbeam of weight scale along the rod-pulling type two-slidingweight precision steelyard that pivoted beam slides, be fixed in a handle band and a weigher of the same end of described crossbeam, and the scale thallium that can on described crossbeam, slide, wherein said crossbeam is the tubular metal crossbeam of a hollow, described scale thallium has two, one of them annular metal trip thallium and described crossbeam outside surface are slidingly matched, and another metal, rod-shaped core thallium and described crossbeam inside surface that has weight scale is slidingly matched.

Further improvement of the utility model is, the downside of described crossbeam two ends outside surface is respectively established a movable locating device determining the relative position of described shaft-like core thallium and described crossbeam, and described movable locating device comprises with the foil on the described crossbeam of being fixed on of an aperture and is limited at a steel ball between the aperture of described foil one aperture and described crossbeam.

Advantage of the present utility model is, the two-slidingweight precision steelyard that provides a kind of scale thallium to slide along the pivot crossbeam, owing to used rod-pulling type scale thallium, improved the resolution of weighing, thereby and removed from and used the possibility that much increases thallium increase buildup of increments error, improved weighing precision thus, and compared cost with the weighing-appliance of precision reduction is also arranged; Because all parts combine as a whole, loss can not come off yet; Also can make miniature portable in addition according to request for utilization, or medium-sized and large-scale.

Below in conjunction with accompanying drawing embodiment of the present utility model is done detailed explanation:

Fig. 1 is the outside drawing of an embodiment of the utility model rod-pulling type two-slidingweight precision steelyard;

Fig. 2 is the sectional view of an embodiment of the utility model rod-pulling type two-slidingweight precision steelyard;

Fig. 3 is shaft-like core thallium upward view.

Referring to Fig. 1 and Fig. 2, the utility model rod-pulling type two-slidingweight precision steelyard comprises that a back side has the tubular metal crossbeam 3 of weight scale, and above-mentioned weight scale is left small and right large to be arranged in order, and each scale is represented 0.01 kilogram, and maximum scale is 0.5 kilogram; The longitudinal length that one back side has a weight scale metal, rod-shaped core thallium 1 identical substantially with described crossbeam 3 longitudinal lengths and that be slidingly matched with described crossbeam 3 inside surfaces, above-mentioned weight scale is divided into five grades, every grade of scale is represented 0.5 kilogram, the reading that the described relatively crossbeam 3 of the described shaft-like core thallium 1 of the numeral on every grade of scale mark left side is used when position aligned with each other, their two ends moves to left, it from the right side first grade to the left side first grade by shelves increase progressively, the weight range of expression is the 0-2 kilogram; And the reading that the described shaft-like core thallium 1 of the numeral on every grade of scale mark right side is used when position aligned with each other, their two ends moves to right with respect to described crossbeam 3, it from the right side first grade to the left side first grade by shelves increase progressively, the weight range of expression is the 2.5-4.5 kilogram; One back side has annular metal trip thallium 2 level indicator 7 and that be slidingly matched with described crossbeam 3 outside surfaces.There are two Long Circle holes 10 two sides in described crossbeam 3 stage casings, for moving described core thallium 1 usefulness easily with hand.At the left end of described crossbeam 3 by being connected a handle band 9 with described crossbeam 3 all-in-one-piece fulcrum knives 4, also at this end by being connected a weigher 11 with described crossbeam 3 all-in-one-piece emphasis knives 5, use to claim hook as weigher 11 herein.Each fixes a movable locating device at the downside at described crossbeam 3 two ends, and described movable locating device is made up of a steel ball 8 and the foil 6 that is fixed on the described crossbeam 3.Have one on the described foil 6 than the little hole of described steel ball 8 diameters, and the downside at described crossbeam 3 two ends also respectively have one with described foil 6 on the aperture that is used of aperture, described crossbeam aperture at the diameter of its nearly described crossbeam 3 outer surface than described steel ball 8 slightly larger in diameter, and more smaller than the diameter of described steel ball 8 at the diameter at its nearly described crossbeam 3 inside surface places.Described steel ball 8 and has sub-fraction to protrude from the inside surface of described crossbeam 3 between the aperture of the aperture of described foil 6 and described crossbeam 3.Described foil 6 in the movable locating device of described crossbeam 3 right-hand members is fixed on the described crossbeam 3 by screw 18 and screw 23, the tail end of wherein said screw 23 does not protrude from the inside surface of described crossbeam 3, and the tail end of described screw 18 protrudes from the spacing usefulness of the inside surface of described crossbeam 3 when moving to right to make described shaft-like core thallium 1; Described foil 6 in the movable locating device of described crossbeam 3 left ends is fixed on the described crossbeam 3 by screw 19 and another screw (not shown), the tail end of wherein said another screw (not shown) does not protrude from the inside surface of described crossbeam 3, and the tail end of described screw 19 protrudes from the spacing usefulness of the inside surface of described crossbeam 3 when moving to left to make described mark shape core thallium 1.The downside of described core thallium 1 has the pit 12 of some fixed interval can be chimeric with that sub-fraction activity of the described steel ball 8 that protrudes from described crossbeam 3 inside surfaces, and this chimeric determined described core thallium 1 and the relative position of described crossbeam 3 make the scale mark of kilogram on the described core thallium 1 or half kilogram just in time the align left side or the right side of described crossbeam 3.Downside at described core thallium 1 also has one with the isometric curved grooved rail 13 in cross section of each described pit 12 crossbeam 3 longitudinal axis that couple together and described, the groove depth of described grooved rail 13 is less than the degree of depth of described pit 12, and described grooved rail 13 remains with the rolling of described steel ball 8 when described core thallium 1 is moved with respect to described crossbeam 3 and contacts.In the both sides of described grooved rail 13 grooved rail 21 and grooved rail 24 are arranged respectively also referring to Fig. 3, described grooved rail 21 is slidingly matched with the tail end that protrudes from the described screw 18 of described crossbeam 3 inside surfaces, fix a spacer pin 16 at the left end of described grooved rail 21, with when described core thallium 1 moves to right with respect to described crossbeam 3 and the tail end of described screw 18 collide and prevent that described core thallium 1 from deviating from described crossbeam 3 from the right side; Described grooved rail 24 is slidingly matched with the tail end that protrudes from the described screw 19 of described crossbeam 3 inside surfaces, fix a spacer pin 17 at the right-hand member of described grooved rail 24, with when described core thallium 1 moves to left with respect to described crossbeam 3 and the tail end of described screw 19 collide and prevent that described core thallium 1 from deviating from described crossbeam 3 from the left side.Spacing necessary assurance weighing capacity of the present utility model to the right; Left spacing must guarantee that minimum of the present utility model weighs.

Referring to Fig. 2, on the right-hand member axis of described shaft-like core thallium 1 by balancing controls that match and form by zeroing threaded hole 22 and zeroing screw 20, to improve weighing precision of the present utility model.

Referring to Fig. 2, the downside of the inside surface of described ring-type trip thallium 2 is fixed the prominent beak 14 of a pin shape, and one duct 15 that can be slidingly matched with described prominent beak 14 being arranged at the downside of described crossbeam, described like this trip thallium 2 is limited to slide neither can rotate also on the described crossbeam 3 and can come off.Described ring-type trip thallium 2 upper sides are embedded with a level indicator 7, the horizontal situation when checking described crossbeam 3 weighings.

The physical dimension of the utility model rod-pulling type two-slidingweight precision steelyard is changeable, a kind of portable two-slidingweight precision steelyard of recommendation, and its weighing capacity is 5 kilograms, and it is 10 grams that minimum weighs, and the weighing degree of accuracy is ± 5 grams, and described crossbeam total length is less than 20 centimetres.This weighing-appliance is compared cost with the wood steelyard of identical function can reduce about 50 percent.

As required, described rod-pulling type two-slidingweight precision steelyard also can be made into market-oriented (weigh and be the 0-20 kilogram) to replace the food market, shop, the wood steelyard and the platform balance that use on stall, (weigh and be the 0-200 kilogram) that also can be made into the warehouse type is to replace large-scale wood steelyard and the loadometer that trade warehouse, harbour, warehouse etc. are located to use.

In the above-described embodiments, described crossbeam 3 can be made by seamless metal tubing, and at this moment described duct 15 is formed by machining; Also can be formed by the sheet metal bending, at this moment described duct 15 is formed by the seam of sheet material.

The using method of the utility model rod-pulling type two-slidingweight precision steelyard: described shaft-like core thallium 1 can spur front and back in described crossbeam 3 pipes, (forward) pulling left when weighing is light, (backward) pulling to the right when weighing is heavy is according to representing with the kilogram to be the weight of unit by described pit 12 and described steel ball 8 chimeric determined described core thalliums 1 with the relative position of described crossbeam 3.Move described trip thallium 2 then, when the described level indicator 7 on the described trip thallium 2 is in horizontality, the pairing numeral of weight scale then represents with the kilogram to be the weight of unit on then described trip thallium 2 left sides and the described crossbeam 3, and kilogram weight addition represented on kilogram weight represented on the described core thallium 1 and the described crossbeam 3 is weighing of alleged object.

Numbering identical on institute's drawings attached is represented identical parts and structure.

Claims (7)

1, a kind of scale thallium can be along the rod-pulling type two-slidingweight precision steelyard of pivoted beam slip, comprise that one has the crossbeam of weight scale, be fixed in a handle band and a weigher of the same end of described crossbeam, and the scale thallium that can on described crossbeam, slide, it is characterized in that, described crossbeam is a tubular metal crossbeam, and described crossbeam outside surface has an annular metal trip thallium that is slidingly matched with it, and described crossbeam inside surface has a metal, rod-shaped core thallium that has weight scale that is slidingly matched with it.

2, rod-pulling type two-slidingweight precision steelyard according to claim 1, it is characterized in that, the downside of described crossbeam two ends outside surface respectively has a movable locating device, described locating device comprises that a steel ball and is fixed on the foil that has an aperture on the described crossbeam, described steel ball is defined between the aperture of the aperture of described foil and described crossbeam, and some protrudes from the inside surface of described crossbeam, the downside of described core thallium have one with the isometric cross section of the described core thallium longitudinal axis curved and the described steel ball of depth ratio protrudes and partly highly little can protrude the grooved rail that partly sliding contact cooperate with described steel ball, have on the described core thallium grooved rail the described core thallium of the depth ratio grooved rail of some fixed interval dark can protrude partly movable chimeric pit with described steel ball with definite described core thallium and described crossbeam relative position.

3, rod-pulling type two-slidingweight precision steelyard according to claim 2, it is characterized in that, a fixing described foil in two screws of described crossbeam one end is the screw that tail end protrudes from described crossbeam inside surface, fixing described another foil in two screws of the described crossbeam other end to be positioned on the described crossbeam on the two steel ball hole lines one of opposite side who protrudes from the screw of described crossbeam inside surface with respect to above-mentioned tail end also be the screw that tail end protrudes from described crossbeam inside surface, respectively there is a grooved rail that is slidingly matched with above-mentioned one screw tail end that protrudes from described crossbeam inside surface respectively the both sides of the described grooved rail that has pit of described shaft-like core thallium downside, can contact with the screw tail end that protrudes from described crossbeam inside surface respectively and stop the spacer pin that described shaft-like core thallium and described crossbeam relatively move away from fixing one respectively with an end of its described screw tail end that is slidingly matched on each bar grooved rail of described no pit grooved rail.

4, rod-pulling type two-slidingweight precision steelyard according to claim 1 is characterized in that, the downside of described ring-type trip thallium inside surface has the pin shape beak of dashing forward, and at the downside of described crossbeam a duct that is slidingly matched with described prominent beak is arranged.

5, rod-pulling type two-slidingweight precision steelyard according to claim 1 is characterized in that, the upside of described ring-type trip thallium outside surface is embedded with a level indicator.

6, rod-pulling type two-slidingweight precision steelyard according to claim 1 is characterized in that, on the end axis of described shaft-like core thallium by one by zeroing threaded hole and the zeroing screw balancing controls that match and form.

7, rod-pulling type two-slidingweight precision steelyard according to claim 1 is characterized in that, the weighing capacity of described precision steelyard is 5 kilograms, and the total length of described crossbeam is less than 20 centimetres.

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