CN2077119U

CN2077119U - Pocket indicator hanging steelyard

Info

Publication number: CN2077119U
Application number: CN 90221056
Authority: CN
Inventors: 徐建华; 牛为民
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-09-21
Filing date: 1990-09-21
Publication date: 1991-05-15

Abstract

The utility model discloses a pocket indicator hanging steelyard, which is composed of a dual-spring weighing mechanism, a weighing indicating mechanism and a zero adjusting mechanism. Because the dual-spring weighing mechanism is adopted, and the zero adjusting structure, the weighing precision adjusting structure and the idle running error of the gear driven decreasing structure, etc., are matched; consequently the pocket indicator hanging steelyard has the advantages of high weighing precision and good consistency. Simultaneously, the whole machine of the pocket indicator hanging steelyard has reasonable and compact structure, convenient adjustment, good direct reading performance, beautiful appearance, smallness, elegancy, and portability.

Description

Pocket indicator hanging steelyard

The utility model relates to the weighing apparatus class, and particularly a kind of pocket pointer-type is hung scale.

Once being popular in spring balance for the moment on the market, generally to form by single extension spring, cylindrical shell, suspension ring, hook, an elongated slot is opened at the cylindrical shell middle part, and row's scale is engraved on the next door, and the pointer and the scale that are fixed on the extension spring lower end have constituted the weighing indication mechanism.This class spring balance because the elastic difference of every extension spring is bigger, thereby, adopt the spring balance of single extension spring, all can have a weighing precision at the bottom of, the defective of consistance difference.In addition, owing to be subjected to the restriction of spring tensile elongation, pointer straight-line displacement scope is little, so its resolution is low, reading error is also big.Limited the application of the spring balance of single extension spring for above-mentioned reasons and greatly.

The purpose of this utility model is in order to overcome above-mentioned existing defective, and provides a kind of pocket pointer-type to hang scale, and its adopts double joint extension spring structure and is equipped with zeroing and the disc type indicating mechanism of weighing, thereby can obtain the effect of precision height, high conformity.

The utility model is achieved in that pocket pointer-type extension scale, comprise and carry button, spring, hook, shell, dial plate, pointer, it is characterized in that also comprising the dual spring Weighing mechanism of forming by two identical springs (9), last cross-arm (5), following cross-arm (11), two T shape hooks (6), the indicating mechanism of weighing that forms by tooth bar (7), gear (8), small extension spring (10), gear stand (14), axle (16), pointer (15), dial plate (24), the null setting of forming by screw rod (2), the knob (3) that returns to zero, stage clip (4).Described dual spring Weighing mechanism, respectively have a square hole on last cross-arm (5) the and arranged on left and right sides base plate that it takes the shape of the letter U, after two T shape hooks (6) pass square hole respectively, pass the aperture of T shape hook (6) upper end with pin (13), article two, an end of spring (9) blocks respectively and hangs on the T shape hook (6), article two, the other end of spring (9) is hooked on down in cross-arm (11) the and arranged on left and right sides aperture, and hook (23) activity is fixed on down cross-arm (11) bottom.The described indicating mechanism of weighing, its tooth bar (7) lower end is movably connected in down cross-arm (11) left side by on the middle position by clothes-hook (19), tooth bar (7) upper end is vacant state, dial plate (24) is fixed on the inwall of protecgulum (20) middle part, there is a small sircle hole its center, gear (8) tightly is enclosed within on the axle (16), after axle (16) left end passes the center hole of support plate (17) and dial plate (24), install pointer (15) in its end, axle (16) right-hand member has a center pit, by screw (25) axle (16) expansion bearing is positioned in the gear stand (14), gear (8) is in engagement dress attitude with tooth bar (7), small extension spring (10) one ends are fixed on tooth bar (7) bottom, and its other end is fixed on down cross-arm (11) upper right quarter.Described null setting, its screw rod (2) top passes cover top portion, and load onto and carry button (1), the zeroing knob (3) of band internal tooth is equipped with at screw rod (2) middle part, screw-threaded engagement on its internal tooth and the screw rod (2), screw rod (2) bottom and last cross-arm (5) middle part riveted and fixed have a stage clip (4) between zeroing knob (3) and last cross-arm (5).

Shell is made of protecgulum (20), bonnet (21), respectively has a dead slot on the symmetric position in the middle of the upper end of protecgulum (20), bonnet (21), and protecgulum (20) medium position has a big hole, and there is a round boss in its periphery outside.In the middle of protecgulum (20) bottom, a boss is arranged, the center has half through hole, bonnet (21) has a boss in the middle of the bottom, the center has a two-stage through hole, this two hole is in the same center line, there is a vertical microscler dead slot at following cross-arm (11) middle part, self-tapping screw (22) from bonnet (21) through hole pass down cross-arm (11) microscler dead slot oneself shoot in protecgulum (20) half through holes, and protecgulum (20), bonnet (21) is fastening.

The principle of work of the present utility model and the course of work are as follows:

It is to adopt the principle that the length of extension spring its applied elongation in elastic limit is directly proportional with suffered pulling force and make that this pocket pointer-type is hung scale.When weighing, the gravity of weighed object acts on the spring (9) of both sides by following cross-arm (11), and be elongated certain length, meanwhile, following cross-arm (11) drives tooth bar (7) and moves down same distance, tooth bar (7) is driven gear (8) rotating certain angle then, and the pointer (15) that is fixed on axle (16) left end also rotates identical angle thereupon, and dial plate (24) promptly indicates the weight of weighed object.The big elastic difference that is occurred when adopting double joint spring parallel-connection structure to reduce only to adopt single extension spring, thus its weighing precision and consistance can be improved.This scale is raised when being in vertical position, if do not hang weight, then the pointer of scale (15) should refer in " 0 " scale position.If pointer this moment (15) departs from " 0 " position, then rotatable zeroing knob (3), screw rod (2) is moved up or down, thereby cross-arm in the drive (5) moves up or down, drive tooth bar (7) and move up or down by spring (9), following cross-arm (11), gear (8) transmission that moves through of tooth bar (7) is rotated pointer (15) to the left or to the right, refers to till " 0 " scale until pointer (15).

The weighing precision that this pocket pointer-type is hung scale is to adjust like this.When deviation appears in weigh indicated value and weighed object actual weight, can reach the purpose of eliminating deviation by both sides T shape hooks (6) dextrorotation simultaneously or left-handed corresponding angle are adjusted.When overgauge (indicated value of promptly weighing is greater than the weighed object actual weight) occurring, dextrorotation both sides T shape hooks (6) to reduce the effective length of bullet Huang (9), reduce pointer (15) rotational angle, till eliminating overgauge.In like manner left-handed both sides T shape hooks (6) can be eliminated minus deviation.But should note making the spring (9) of both sides to use number of turns unanimity when adjusting.

The utility model is owing to adopt the dual spring Weighing mechanism, and is equipped with the structures such as idle running error of zeroing, weighing precision adjustment and the transmission of minimizing rack-and-pinion, makes it have the weighing precision height, the advantage of high conformity.This extension scale said device features rational structure, compactness, easy to adjust, direct-reading good, have attractive appearance, small and exquisite, easy to carry.

Fig. 1 is an outside drawing of the present utility model;

Fig. 2 is the front view after the utility model removes bonnet;

Fig. 3 is the A-A cut-open view of Fig. 2.

Below by embodiment the utility model is further elaborated.

Shown in accompanying drawing 1-3, to carry button (1) and pass the top that screw rod (2) top is contained in scale, the zeroing knob (3) that will have internal tooth screws in screw rod (2) middle part, is inserted in stage clip (4) then, screw rod (2) bottom and last cross-arm (5) middle part riveted and fixed.Square hole in last cross-arm (5) and arranged on left and right sides penetrates T shape hook (6), is located respectively on last cross-arm (5) with two pins (13).Article two, an end of spring (9) blocks respectively and hangs over T shape hook (6) bottom, and the other end of two springs (9) is hooked on down in cross-arm (11) the and arranged on left and right sides aperture.Inwall installs circular dial plate (24) at protecgulum (20) middle part, and dial plate (24) inner face is being fixed support plate (17), and the center hole of dial plate (24) and support plate (17) should be concentric.Axle (16) wringing fit is packed in gear (8) center pit, pass support plate (17) and dial plate (24) center pit then, pointer (15) is packed in axle (16) left part, load onto table lid (18).Gear stand (14) is being overlapped gear (8), and gear stand (14) one end plates are fixed on the support plate (17), by screw (25) axle (16) right-hand member expansion bearing on its another end plate.Tooth bar (7) lower end is movably connected in down cross-arm (11) left side by on the middle position by clothes-hook (19), small extension spring (10) one ends are fixed in the aperture of tooth bar (7) bottom, its other end is fixed on down cross-arm (11) upper right quarter, make tooth bar (7) and gear (8) be in engagement, small extension spring (10) also plays the effect that reduces gear (8) idle running error.Said modules is placed in the protecgulum (20), refill bonnet (21), the left and right sides, top of scale is fastening with screw (12), and the lower middle position of scale is fastening with forward and backward lid (20,21) with self-tapping screw (22).Hook (23) activity is fixed on down cross-arm (11) bottom, promptly becomes this pocket pointer-type and hangs scale.After zeroing and weighing precision adjustment, this scale can be delivered for use.

Claims

1, a kind of pocket pointer-type is hung scale, comprise and carry button, spring, hook, shell, dial plate, pointer, it is characterized in that also comprising the dual spring Weighing mechanism of forming by two identical springs (9), last cross-arm (5), following cross-arm (11), two T shape hooks (6), the weighing indicating mechanism that forms by tooth bar (7), gear (8), small extension spring (10), tooth rate support (14), axle (16), pointer (15), dial plate (24), the null setting of forming by screw rod (2), the knob (3) that returns to zero, stage clip (4).

2, pocket pointer-type according to claim 1 is hung scale, it is characterized in that described dual spring Weighing mechanism, respectively have a square hole on last cross-arm (5) the and arranged on left and right sides base plate that it takes the shape of the letter U, after two T shape hooks (6) pass square hole respectively, pass the aperture of T shape hook (6) upper end with pin (13), article two, an end of spring (9) blocks respectively and hangs on the T shape hook (6), article two, the other end of spring (9) is hooked on down in cross-arm (11) the and arranged on left and right sides aperture, and hook (23) activity is fixed on down cross-arm (11) bottom.

3, pocket pointer-type according to claim 1 is hung scale, it is characterized in that the described indicating mechanism of weighing, its tooth bar (7) lower end is movably connected in down cross-arm (11) left side by on the middle position by clothes-hook (19), tooth bar (7) upper end is vacant state, dial plate (24) is fixed on the inwall of protecgulum (20) middle part, there is a small sircle hole its center, gear (8) tightly is enclosed within on the axle (16), after axle (16) left end passes the center hole of support plate (17) and dial plate (24), install pointer (15) in its end, axle (16) right-hand member has a center pit, by screw (25) axle (16) expansion bearing is positioned in the gear stand (14), gear (8) is in engagement dress attitude with tooth bar (7), and small extension spring (10) one ends are fixed on tooth bar (7) bottom, and its other end is fixed on down cross-arm (11) upper right quarter.

4, pocket pointer-type according to claim 1 is hung scale, it is characterized in that described null setting, its screw rod (2) top passes cover top portion, and load onto and carry button (1), the zeroing knob (3) of band internal tooth is equipped with at screw rod (2) middle part, screw-threaded engagement on its internal tooth and the screw rod (2), screw rod (2) bottom and last cross-arm (5) middle part riveted and fixed have a stage clip (4) between zeroing knob (3) and last cross-arm (5).

5, pocket pointer-type according to claim 1 is hung scale, it is characterized in that described shell is made of protecgulum (20), bonnet (21), respectively have a dead slot on the symmetric position in the middle of the upper end of protecgulum (20), bonnet (21), protecgulum (20) medium position has a big hole, and there is a round boss in its periphery outside.