CN2164027Y

CN2164027Y - Pocket needle hanging balance

Info

Publication number: CN2164027Y
Application number: CN 93214830
Authority: CN
Inventors: 钟雾; 王卫东
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-27
Filing date: 1993-05-27
Publication date: 1994-05-04
Anticipated expiration: 2003-05-27

Abstract

The utility model relates to a pocket pointer type hanging balance, which comprises a plurality of parts of a weighing mechanism composed of double springs, a disk type weighing indicating mechanism, a zero-setting device and a micro calculator. The pocket needle hanging balance is mainly composed of a front and a rear covers, a main spring, a rack gear tension spring, a zero return tension spring, a hanging ring, a pointer dial disc, a zero adjusting mechanism, a tooth shaft, a rack gear, a draw rod, a hanging hook, the micro calculator, etc. The utility model has the advantages of reasonable and compact structure, convenient adjustment, good direct reading performance, high precision, shapely configuration and convenient carrying.

Description

Pocket needle hanging balance

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

Once popular on the market a kind of spring balance, generally form by single extension spring, cylindrical shell, suspension ring, hook, the middle sidepiece of cylindrical shell is opened an elongated slot, row's scale is write on the next door, the pointer and the scale that are fixed on the extension spring lower end constitute the display device of weighing, this spring balance, because single spring diversity ratio is bigger, the ratio of precision of spring balance is lower; In addition, be subjected to the restriction of extension spring length, pointer straight-line displacement scope is little, so its resolution is low, reading error is big, so above reason has limited the usable range of spring balance.

The purpose of this utility model is to overcome the defective of above-mentioned existence, provides a kind of pocket pointer-type to hang scale, and it adopts the double joint spring structure, and be equipped with zeroing and the disc type indicating mechanism of weighing, and with the micro calculator pricing device, thereby can obtain the precision height, the effect of high conformity.

The utility model is achieved in that pocket pointer-type extension scale comprises forward and backward lid, main spring, tooth bar extension spring, returns parts such as zero extension spring, suspension ring, pointer scale dish, null setting, tooth axle, tooth bar, pull bar, hook, counter; By the dual spring weighing mechanism that comprises that two identical main springs (7), hanger (5), pull bar (11), two braces (6) are formed; The weighing indication mechanism of forming by tooth bar (9), tooth axle (8), tooth bar extension spring (10), index dial (17), pointer (15); Form balancing controls and form by zeroing screw (2), stage clip (4), square washer (3).

Dual spring weighing mechanism, its hanger (5) left and right sides base plate that is in-line is respectively opened a circular hole, two braces (6) pass wherein, one small sircle hole is arranged at the brace bottom, two main springs (7) are connected with pull bar (11) with two braces (6) respectively, and hook is connected with the pull bar lower end with abutment ring;

The weighing indication mechanism, its tooth bar (9) lower end is connected pull bar (11) versatilely by rack pins and goes up the centre position, tooth bar (9) upper end is vacant state, index dial (17) is fixed on unsteady being connected on the center pit of bonnet of back shaft (8) one ends of bonnet, an other end part is floated and is connected on the shaft-cup (14), pointer is fixed on an end of axle, tooth bar and the engagement of an axle tooth portion, tooth bar (9) and pull bar (11) another to be connected be tooth bar extension spring (10);

Null setting, its zeroing screw (2) passes square washer (3) and loads onto compression spring (4) and is connected with hanger (5); Bonnet is with a micro calculator (19); Its shell is made of protecgulum (20) and bonnet (21), and a rectangular hole is respectively opened on front and rear covers top, and a macropore is opened at protecgulum (20) middle part, and a square opening is opened in the bonnet bottom, and there is coupling shaft bonnet inside like boss.

The utility model now is described with reference to the accompanying drawings.

Fig. 1 is an external form reference diagram of the present utility model;

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

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

As shown in drawings, the utility model comprises the Weighing mechanism of being made up of two identical main springs (7), hanger (5), pull bar (11), two braces (6), the indication mechanism of forming by tooth bar (9), tooth axle (8), tooth bar extension spring (10), gear shaft-cup (16), pointer (15), index dial (17) of weighing, the null setting of forming by zeroing screw (2), stage clip (4), square washer (3).Described dual spring Weighing mechanism, its be in-line hanger (5) left and right sides base plate each make a call to a small sircle hole, after two braces (6) pass circular hole, there is a small sircle hole former brace lower end, the hook of main spring (7) just hangs on the lower end small sircle hole of brace, article two, the other end of main spring is fixed on the two ends of pull bar (11) by rotation, and two are returned zero extension spring (2) and connect by the aperture on the pull bar (11), and an other end that returns zero extension spring is fixed on the backstay of bonnet; The described indication mechanism of weighing, the lower end of tooth bar (9) is movably connected on pull bar (11) centre position by rack pins, tooth bar (9) upper end is vacant state, the bonnet centre bit is equipped with a small sircle hole, tooth axle (8) one ends are placed in the small sircle hole of bonnet, the other end is placed in the shaft-cup (16), mesh together with tooth bar (9) like this and be free engagement, pointer is placed on the end of axle (8), tooth bar extension spring (10) one ends are fixed on the pull bar (11), and the other end is fixed on the tooth bar (9); Described null setting is made up of zeroing screw (2), compression spring (4), square washer (3), and a circular hole is arranged in the square washer (3), pass it with zeroing screw (2), put stage clip (4) then, link with hanger (5), hanger has threaded hole in (5); The counter pricing device is placed on micro calculator (19) in the groove of bonnet, is screwed.

Shell is made up of protecgulum (20) and bonnet (21), a rectangular hole is all arranged at protecgulum top and bonnet top, the positive macropore that protrudes a small stair of protecgulum, its effect is transparency cover (22) fixedly, and several screw holes are arranged, fixedly step and screw counter bore that axle is arranged on the bonnet, front and rear covers is fastening by screw.

The utility model is to adopt extension spring in elastic limit, the principle that the length of its applied elongation is directly proportional with suffered pulling force and making, when weighing, the gravity of weighed object acts on the spring of both sides by pull bar (11), and be elongated certain length, meanwhile the moving belt carry-over bar of pull bar moves down, and mobile phase same distance, tooth bar (9) drives tooth axle (8) and rotates, be fixed on the pointer (15) of axle on (8) also along with rotation, so graduation apparatus is indicated is exactly the weight of object, the bigger elastic difference that is occurred when adopting double joint spring parallel-connection structure to reduce only to adopt single extension spring, thereby improve its weighing precision and consistance, this scale is raised pointer when being in vertical position (15) should refer to be zero, if depart from rotatable zeroing screw (2), hanger (5) is moved up or down reach the position that pointer refers to " 0 ".

Weighing precision of the present utility model is to transfer like this, when deviation appears in the actual weight of weigh indicated value and weighed object, can be by transferring (rotation) both sides main springs (7), but should note making the spring use number of turns unanimity of both sides during adjustment.

The utility model is owing to adopt the dual spring Weighing mechanism, and be equipped with zeroing weighing precision adjustment and reduce the structure of rack-and-pinion idle running error, make it have the weighing precision height, the advantage of high conformity, and at bonnet with practical calculator valuation, this hook reasonable integral structure, compactness, easy to adjust, direct-reading good, have attractive appearance, small and exquisite, easy to carry.

Claims

1, a kind of pocket pointer-type is hung scale, comprise shell, suspension ring, spring, hanger, pull bar, tooth axle, gear, index dial, pointer, it is characterized in that it is by the dual spring weighing mechanism that comprises that two identical main springs (7), hanger (5), pull bar (11), two braces (6) are formed, by the weighing indication mechanism that tooth bar (9), tooth axle (8), tooth bar extension spring (10), index dial (17), pointer (15) are formed, form balancing controls and form by zeroing screw (2), stage clip (4), square washer (3);

Null setting, its zeroing screw (2) passes square washer (3) and loads onto compression spring (4) and is connected with hanger (5);

2, pocket pointer-type according to claim 1 is hung scale, it is characterized in that bonnet has a micro calculator (19).

3, pocket pointer-type according to claim 1 is hung scale, it is characterized in that shell is made of protecgulum (20) and bonnet (21), a rectangular hole is respectively opened on front and rear covers top, and a macropore is opened at protecgulum (20) middle part, a square opening is opened in the bonnet bottom, and there is coupling shaft bonnet inside like boss.