CN1122907A - Balance knife, knife bearing non-separating device capable of loading and unloading weight - Google Patents

Abstract

The utility model provides a balance sword, the device that the sword bearing does not deviate from and load and unload the weight, by the lift bar, the lift plate, the jib, rings and universal hanger joint are constituteed, the lift bar is fixed with the balance support through balance lug thrust pin lower extreme, the lift plate is fixed at the lower extreme of lift bar, the jib is thick lower thin cylinder pole, the centre bore that its lower part passed the lift plate is connected with balance dish shackle, the jib upper end and rings lower half ring shackle connection, rings upper half ring links to each other with the balance lug through universal hanger joint, its connected mode is the universal joint connection, the value is unchangeable when this device is measured same weight many times, balance measurement accuracy has been improved, make the balance uncertainty improve an order of magnitude.

Description

Balance knife, cutter hold and do not break away from the device that can load and unload counterweight

The present invention relates to a kind of device of balance loading and unloading counterweight.

Balance passes device as a kind of quality amount from precision and is widely used in the mass measurement field.Its structure mainly is made up of crossbeam, suspension, support and arrestment mechanism, crossbeam comprises three cuttves and three tool rests, middle cutter spacing is on the middle tool rest of crossbeam symmetrical center line, two limit cuttves lay respectively on the limit tool rest at crossbeam two ends, suspension comprises balance hanger that hangs on the blade of limit and the scale pan that links to each other with hanger, support and arrestment mechanism comprise that the sky lifts wing, balance handle, cam mechanism, and the balance handle links to each other with cam, and it is to be slidingly connected that cam mechanism and sky lift between the wing.When the Weighing scales operating handle makes it when turning clockwise, make the sky lift wing through cam mechanism and rise, middle cutter and middle cutter hold, two limit cuttves and limit cutter hold disengaging, the scale pan rising, be to close a day level state at this moment, can load and unload counterweight, when the Weighing scales operating handle when being rotated counterclockwise, make the sky lift wing through cam mechanism and descend, in cutter and middle cutter holds, two limit cuttves and limit cutter are accepted and touched, scale pan descends, and this moment, balance entered the measurement state, can be to carrying out reading.No matter equal-arm balance is that loading and unloading counterweight homemade or that introduce all will close balance at present, balance knife, cutter hold under the disengaged position and carry out, when it repeatedly measures same counterweight, the measurement indicating value is inconsistent, reason is that each measurement all will be closed balance loading and unloading counterweight, again Kaitian flat after, balance knife, cutter are accepted and are touched the state position and change, so it is inequality repeatedly to measure same counterweight indicating value demonstration, influenced the measuring accuracy of equal-arm balance like this.

The object of the present invention is to provide a kind of balance knife, cutter to hold and do not break away from the device that can load and unload counterweight.

This device comprises the identical member of two covers, and be positioned at the both sides of balance, the formation of one cover only is described here, it is made up of lifting arm, riser, suspension rod, suspension ring and the universal joint that hangs, lifting arm lifts wing through balance hanger supporting pin lower end with the sky and fixes, riser is fixed on the lower end of lifting arm, suspension rod is upper coarse and lower fine cylindrical bar, the interstitial hole that riser is passed in its underpart is connected with the scale pan shackle, the suspension rod upper end is connected with second bail ring of suspension ring, semi-ring links to each other with the balance hanger through the universal joint that hangs on the suspension ring, and its connected mode is that universal joint connects.The principle of work of this device is: lifted the same day in the wing uphill process, drive lifting arm, riser rising, riser is elevated to the appropriate location, mention suspension rod and make suspension rod simultaneously and the suspension ring disengaging, scale pan was hung through suspension rod and was hung on the riser this moment, scale pan and balance hanger break away from, balance enters that Kaitian is flat can load and unload the counterweight state, be that balance knife, cutter hold and do not break away from the state that can load and unload counterweight, load and unload counterweight like this and the impulsive force of scale pan is acted on the sky through suspension rod, riser and lifting arm lift above the wing and the balance hanger is had no effect.

The present invention is described in more detail below in conjunction with drawings and Examples.

Fig. 1 is the structural representation of the present invention under the flat measurement state of Kaitian;

Referring to accompanying drawing 1, lifting arm 2 lifts wing 6 through balance hanger supporting pin 7 lower ends and sky and fixes, the fixing riser 1 in lifting arm 2 lower ends, riser 1 is that thickness is the long rectangular slab of 10mm, 3 holes are arranged on it, being equipped with a big hole at the plate centre bit is interstitial hole 9, its aperture is less than suspension rod 3 upper diameter 10mm, greater than suspension rod 3 lower diameter 10mm, in center pit 9 symmetrical both sides two apertures are arranged, it is fixing with lifting arm 2 to be used for riser 1, suspension rod 3 is upper diameter cylindrical bars greater than lower diameter, the center pit 9 of riser 1 is passed in its underpart, when riser 1 rises, because of the aperture of riser 1 center pit 9 less than suspension rod 3 upper diameter, suspension rod 3 will be hung on riser 1, when riser 1 descends, because of suspension rod 3 lower diameter less than riser 1 center pit 9, then suspension rod 3 breaks away from riser 1.Suspension rod 3 bottoms have one section to be the gong bar, with the link 18 of fixed derrick 3 with scale pan 8, suspension rod 3 is a right cylinder with the web member 18 of scale pan 8, there is a gong pit at the end face center along the cylinder axis position thereon, is used for being connected with suspension rod 3 lower end gong bars, and web member 18 lower ends symmetry cylinder axis is opened a space rectangular channel 11, groove face centre bit perpendicular to rectangular channel 11 is equipped with a through hole, pin 12 penetrates in the hole, and the hook 14 of scale pan 8 is contained in the rectangular channel 11, hangs on the pin 12.Open a solid rectangle groove being symmetrical in suspension rod 3 top cylindrical center lines, the thickness of groove is 1 thick sesquialters of suspension ring 4, bore a pin hole perpendicular to the groove face center, the top of suspension ring 4 links to each other with the universal joint 5 that hangs, the bottom is contained in the rectangular channel of suspension rod 3, the pin of wearing in the pin hole 13 is by heart position, suspension ring 4 hole, when riser 1 rises, pin 13 breaks away from suspension ring 4, then suspension rod 3, scale pan 8 break away from suspension ring 4, when riser 1 descended, pin 13 linked to each other with suspension ring 4, and then suspension rod 3, scale pan 8 and suspension ring 4 couple together.The universal joint 5 that hangs is to couple together by universal joint with balance hanger 10.

The balance that installs this device additional has three kinds of states: close a day level state 1., it is characterized in that the sky lifts wing 6 and is raised to from point, balance knife 17, cutter hold 16 and break away from, and suspension rod 3 breaks away from suspension ring 4, suspension rod 3, scale pan 8 are hung and are hung on the riser 1, and scale pan 8 and balance hanger 10 are broken away from; 2. the balance measurement state promptly enters reading and measures state, it is characterized in that the sky lifts wing 6 and drops to extreme lower position, and balance knife 17, cutter hold 16 and do not break away from, and suspension ring 4 link to each other with scale pan 8 through suspension rod 3; 3. Kaitian is flat can load and unload the counterweight state, it is characterized in that the sky lifts the height that degree of lifting away from rises less than the pass day wing of balance holder at ordinary times 6 on the wing 6.

Working routine of the present invention is: the Weighing scales operating switch knob, making the sky lift wing 6 through cam mechanism promptly closes a day level state by most significant digit to drop to lowest order is the balance measurement state, same Weighing scales operating switch knob makes the sky lift wing 6 through cam mechanism and is risen to by lowest order that Kaitian is flat can load and unload the counterweight state, in holder wing 6 uphill process, drive lifting arm 2, riser 1 rises, riser 1 is elevated to the appropriate location, mention suspension rod 3 and suspension rod 3 and suspension ring 4 are broken away from, scale pan 8 was hung through suspension rod 3 and was hung on the riser 1 this moment, scale pan 8 breaks away from balance hanger 10, at this moment the sky lifts wing 6 and rises anchor point on the supporting pin 7 that highly makes on it and the balance beam 15, anchor point on the balance hanger 10 will have enough distances, guarantee that the balance hanger 10 on balance beam 15 and the beam is in Kaitian's level state, balance enters out flat day and can load and unload the counterweight state at this moment, the multidirectional impulsive force of loading and unloading counterweight is through scale pan 8, suspension rod 3 acts on the riser 1, riser 1 acts on the sky by lifting arm 2 and lifts on the wing 6, because suspension rod 3 breaks away from suspension ring 4, the impulsive force of loading and unloading counterweight can not affact on the balance hanger 10, operating switch balance handle makes the sky lift wing 6 declines through cam mechanism again, can load and unload the counterweight state to the balance measurement state-transition by Kaitian is flat, in the process that descends, it lifts wing 6 and drives lifting arm 2, riser 1 makes suspension rod 3 when descending, scale pan 8 also descends, suspension rod 3 is linked to each other with suspension ring 4, at this moment scale pan 8 links to each other with balance hanger 10, when suspension rod 3 begins to link to each other with suspension ring 4, riser 1 begins to break away from suspension rod 3, it lifts wing 6 when dropping to extreme lower position, riser 1 complete and suspension rod 3 disengagings, balance enters the balance measurement state.

The present invention has following advantage: repeatedly measure the same counterweight, balance shows that indicating value is Unique, lifted from the balance measurement precision, so that the measurement result uncertainty has improved one The order of magnitude.

Claims (1)

1. balance knife, cutter hold and do not break away from the device that can load and unload counterweight, it is characterized in that: it is made up of lifting arm, riser, suspension rod, suspension ring and the universal joint that hangs, lifting arm lifts wing through balance hanger supporting pin lower end with the sky and fixes, riser is fixed on the lower end of lifting arm, suspension rod is upper coarse and lower fine cylindrical bar, its underpart pass riser in be connected with the scale pan shackle with the hole, the suspension rod upper end is connected with second bail ring of suspension ring, semi-ring links to each other with the balance hanger through the universal joint that hangs on the suspension ring, and its connected mode is that universal joint connects.