CN2370387Y

CN2370387Y - Calliper capable of limiting measuring force

Info

Publication number: CN2370387Y
Application number: CN 99231222
Authority: CN
Inventors: 吴峰山; 彭朋; 唐勇杰
Original assignee: GUANGLU MEASURING TOOL FACTORY GUILIN
Current assignee: GUANGLU MEASURING TOOL FACTORY GUILIN
Priority date: 1999-03-19
Filing date: 1999-03-19
Publication date: 2000-03-22
Anticipated expiration: 2009-03-19

Abstract

The utility model relates to a caliper capable of limiting measuring force. A force-limiting device is additionally installed at the rear end of a ruler frame of the original vernier caliper or electronic digital display caliper that is provided with a ruler frame and a ruler body, which forms the novel caliper. One end of a force-limiting rod of the force-limiting device is fixedly installed on the ruler frame, and the other end is sheathed with a force-limiting frame and a force-limiting spring. One end of the force-limiting spring is fixedly installed on the force-limiting frame, and the other end is fixed on the force-limiting rod. The force-limiting device is also provided with a locking device that can fix the force-limiting device on the ruler body. An implicit measuring force is preset when the caliper capable of limiting measuring force is used for measuring, and the errors that are caused by different measuring force in strength can be eliminated.

Description

A kind of slide calliper rule that limit dynamometry

The utility model relates to a kind of direct reading, as to be with scale or mark slide calliper rule, particularly a kind of slide calliper rule that limit dynamometry of being used for.

No matter existing slide calliper rule are vernier caliper or digimatic calipers, all are to limit ergometry with hand, because each one firmly varies in size, cause same measurement result difference to be measured.

The purpose of this utility model is that the ergometry that discloses between a kind of two claws can limited slide calliper rule.

The purpose of this utility model is achieved in that the utility model is the same with existing slide calliper rule, also comprises blade and chi frame, and different is that also being fixed with one at described chi back end of frame can be with the force limiting device of chi frame along the blade slip; Force limiting device is by a force-limit rod that is connected with the chi frame and be set in force-limit frame and elastic device on the force-limit rod successively, and the locking device that force-limit frame can be fixed on the blade constitutes; Elastic device one end is fixed on the chi frame and can slides along force-limit rod with the chi frame, and the other end is fixed on the force-limit rod.

Because the utility model with force limiting device, can limit the dynamometry when measuring, it all is tested under same dynamometry making all measured, so the gained measurement result has been eliminated the measuring error that causes because of the dynamometry size variation.

Fig. 1 is the structural representation of a kind of embodiment of the present utility model;

Fig. 2 is the partial enlarged drawing of the force limiting device of embodiment shown in Figure 1.

In concrete enforcement of the present utility model, on the force-limit frame 8 of force limiting device 10, two plate washers with holes 4,7 are arranged, force-limit rod 3 one ends are installed on the chi frame 2, the other end passes plate washer 4, force-limit spring 5, plate washer 7 successively, and force-limit spring 5 and force-limit frame 8 can slide along force-limit rod 3; Also have a locking device 9 on the force-limit frame 8, this device can be fixed on force-limit frame 8 on the blade 1.In the present embodiment, force-limit spring 5 can be one group, also can be two groups.When force-limit spring 5 was one group, the one end was fixed on the force-limit frame 8, and can slide with force-limit frame 8, and its other end is fixed on the force-limit rod 3.Because the actual elongation of industrial compression spring and the elasticity coefficient of compression and inequality, for keeping away the error that therefore causes, force-limit spring 5 can select two groups of series connection to be placed on the force-limit rod 3.When force-limit spring 5 was two groups of series connection, two groups of force-limit spring 5 opposite ends were fixed on the force-limit rod 3, and two force-limit springs, 5 far-ends can be installed in respectively on the baffle plate 4.7, and can slide with force-limit frame 8.

Certainly, for increasing dynamometry, force-limit spring 5 also can be many groups, is parallel between the baffle plate 4.7 after suffering from connection in twos, and installs in the above described manner.

In reality was implemented, force-limit spring 5 also can be replaced by other elastic device, as the spring-piece type elastic cable, was to utilize its extension recovery power when using elastic cable just.

In the slide calliper rule of regular size, preferably to select force-limit spring 5 maximums can produce the stable dynamometry of 6N, but preferably use the dynamometry of 3～4N, this moment, the decrement of spring was 1～1.5mm.Measuring outside dimension, as when surveying spool, the attachable mechanical stage frame, preset a numerical value than the little 1～1.5mm of physical size to be measured, with locking device 9 lockings, force limiting device 10 is fixed on the blade 1, object under test is placed between two measuring jaws, measuring jaw tightens object under test automatically, and this moment, dynamometry was a stability force between 3～4N; When measuring inside dimension, during as gaging hole, preset the numerical value than the big 1～1.5mm of entity size to be measured on the contrary, the locking force limiting device then can obtain to be measured under equal dynamometry.For example measure the hole of φ 5mm: a, proofread zero-bit with said method; B, promotion chi frame, the about 6.2mm of default value; C, locking force limiting device; D, attachable mechanical stage frame to the left stretch into measuring jaw in the hole to be measured; E, loosen chi frame and suitably swing, under spring action, make two measuring jaws reach suitable measurement state, to obtain the correct measurement value.

Claims

1, a kind of slide calliper rule that limit dynamometry comprise blade and chi frame, it is characterized in that: also being fixed with one in described chi frame (2) rear end can be with the force limiting device (10) of chi frame (2) along blade (1) slip; Force limiting device (10) is by a force-limit rod (3) that is connected with chi frame (2) and be set in force-limit frame (8) and the elastic device (5) on the force-limit rod (3) successively and the locking device (9) that force-limit frame (8) can be fixed on the blade (1) constitutes; Elastic device (5) one ends are fixed in that chi frame (2) is gone up and can slide along limit power thick stick (3) with chi frame (2), the other end solid on force-limit rod (3).

2, slide calliper rule according to claim 1 is characterized in that: described force-limit frame (8) is set on the force-limit rod (3) by two plate washers (4,7); Described elastic device be placed in that force-limit rod (3) is gone up, the force-limit springs (5) of two groups of series connection between two plate washers (4,7) of chi frame (2), opposite end two groups of force-limit springs (5), that be positioned at plate washer (4,7) centre is for being fixed in the stiff end on the force-limit rod (3), and the far-end of two groups of force-limit springs (5) is individually fixed on the plate washer (4,7).