CN2456161Y - Pressurizing mechanism - Google Patents

Abstract

The utility model relates to a pressurizing mechanism, particularly the pressurizing mechanism on a cotton moisture tester, which belongs to a matching device on a special tester. The utility model is composed of a frame 29, a gear shaft 18, a handgrip 1, a gear 19, an inner sleeve 21, holding screws 20, a push rod 23, a pressure spring 26, an outer sleeve 25, a pressure plate 28, a pointer spacer 4, a pointer 2 and a fixing base 16, wherein the tail end of the inner sleeve 21 is provided with a claw slot 5; the fixing base 16 is provided with a stopping claw slot 15 and is additionally provided with a constant-pressure locking device. The utility model has the advantage that at the time of pressurization, once a testing person wrench the handgrip 1 to an extent, the utility model can be automatically locked to remain constant pressure, and thus the utility model can favorably reduce the working strength of the testing person to ensure testing precision.

Description

Pressing mechanism

The utility model relates to a kind of pressing mechanism, and the pressing mechanism on particularly a kind of cotton moisture content analyzer belongs to the corollary apparatus on the special measuring instrument.

At present, to cotton moisture content, the mensuration that also claims regain, the general electrical measuring method that adopts, electrical measuring method realizes by a special measuring instrument and a cover pressing mechanism, the effect of pressing mechanism is that the cotton that is positioned between the pole plate is pressurizeed, and then the resistance signal between pole plate is passed to analyzer, predicts the water percentage of cotton according to the size of resistance value in order to analyzer.And to the compression motion of pressing mechanism all by manually finishing, promptly pull handle by the tester, make the gear shaft that is connected with handle revolve axle, the inner sleeve extruding of being nibbled the band tooth bar of joining by the gear driven on the gear shaft with it is positioned at the pressure spring of outer sleeve, thereby makes the outer sleeve displacement and the roof pressure pole plate.And in this state, tester's hand not only can not unclamp, and to remain original compression strength, otherwise, meeting causes inner sleeve to be shunk back in the sliding cavity of holder because of the effect of the restoring force of pressure spring, also be return, thereby can influence or change the acting force of the previous roof pressure pole plate in outer sleeve end that the test effect just is difficult to guarantee.In addition, because tester's a hand needs gripping handle all the time in test process, to guarantee that pressure is constant, writing etc. only depending on the another hand to finish like this numerical value that is reflected on tester write down also is very inconvenience singlehandedly, so tester's working strength is bigger, and be difficult to guarantee measuring accuracy.

Task of the present utility model is will provide a kind of tester in case handle is pulled that can let go behind a certain position, that can guarantee constant pressure, that alleviate tester's working strength, as to guarantee measuring accuracy pressing mechanism.

Task of the present utility model is finished like this, a kind of pressing mechanism, be made up of frame 29, gear shaft 18, handle 1, gear 19, inner sleeve 21, holding screw 20, push rod 23, pressure spring 26, outer sleeve 25, platen 28, pointer cushion block 4, pointer 2, holder 16, the not end of described inner sleeve 21 offers pawl groove 5; On described holder 16, offer retaining pawl groove 15 and have additional a constant voltage locking device, it is by little spring 10, small rack 8, check plate 7, retaining pawl 6, constitutes by bar 9, little spring 10 places on the holder 16, and with the back end in contact of check plate 7, small rack 8 is fixed on the holder 16, the middle part of check plate 7 and small rack 8 loose joints, retaining pawl 6 is positioned at the front end of check plate 7, and be positioned at retaining pawl groove 15, and and it is corresponding with described pawl groove 5, be fixed on the rear end of check plate 7 by bar 9.

The utility model has been owing to adopted said structure, and during pressurization, the tester is in case pull handle 1 and can lock voluntarily to a certain degree and keep constant pressure, thereby can alleviate tester's working strength preferably, thereby guarantees measuring accuracy.

Below in conjunction with accompanying drawing the utility model is further described below.

Accompanying drawing is the utility model structural drawing.

On holder 16, offer a spring base hole 12, settle little spring 10 in it, its upper end contacts with the rear end of check plate 7, small rack 8 screws in the pre-a pair of corresponding screw 14 on holder 16 by pair of screws 13, check plate 7 middle parts are lever by bearing pin 11 with small rack 8 and are connected, retaining pawl 6 is positioned at the front end of check plate 7, preferably and check plate 7 integral productions, the corpus unguis position of retaining pawl 6 is in the retaining pawl groove 15, the pawl point of retaining pawl 6 is corresponding with pawl groove 5, in case pawl point pawl is gone in the pawl groove 5, just practicable locking, with guarantee outer sleeve 25 can not be stressed spring 26 restoring force and in the sliding cavity 17 of holder 16, return.

Gear shaft 18 hub settings of the present utility model are on frame 29, handle 1 is set in the one end, and gear 19 is installed with at its other end, gear 19 is nibbled mutually with the inner sleeve 21 of bottom band tooth bar 22 and is joined, thereby drive inner sleeve 21 to the respective direction displacement by gear 19 suitable/contrary rotations, holding screw 20, push rod 23 place in the inner sleeve 21, and pressure spring 26 places in the outer sleeve 25.Earlier pressure spring 26 is put into outer sleeve 25 cavity volumes.One end of pressure spring 26 stops that by the pressure spring seat in the outer sleeve 25 other end is then stopped by the spring base 24 in inner sleeve 21 cavity volumes.Place an end of the push rod 23 in the inner sleeve 21 to contact with pressure spring 26, the other end of push rod 23 contacts with holding screw 20, and holding screw 20 is joined with inner sleeve 21 spiral shells.Conrotatory holding screw 20.Just by its with push rod 23 to pressure spring 26 direction displacements, make pressure spring 26 retraction, vice versa.Platen 28 has two, and a slice wherein and outer sleeve 25 one process, and another sheet can be realized combination by screw 27.Pointer cushion block 4 is positioned on the chute 30 that is formed in advance on the outer sleeve 25, and pointer is fixed on the pointer cushion block 4 by pair of screws 3.Even described constant voltage locking device is moved on other parts of the utility model pressing mechanism, but the scope of the technical program of not dissociating yet.

Before using the utility model, the acting force that reply will be pressurizeed in the test of back carries out the setting adjustment of a certain reference value, specifically is, make inner sleeve 21 in sliding cavity 17 to left dislocation, go into pawl groove 5 until being displaced to retaining pawl 6 pawls.The power that this moment, pressure spring 26 acted on outer sleeve 25 meets a certain reference value requirement basically, if any deviation, is then finely tuned by holding screw 20, and generally the cotton regain being measured required moulding pressure is 735 ± 49 newton.

The utility model is to embody its action like this, frame 29 is fixed on test board or the frame, with platen 28 and pole plate Joint, pull handle 1, make gear shaft 18 to rotation counterclockwise, gear 19 is also right, because tooth bar 22 is nibbled mutually with gear 19 and is joined, so drive tooth bar 22 along with the rotation of gear 19, thereby make whole inner sleeve 21 from the sliding cavity 17 that before had been positioned to left dislocation, and and then spread to pressure spring 26 by the push rod of establishing within it 23, pressure spring 26 is subjected to thrust and shrinks, and masterpiece is used for outer sleeve 25, and outer sleeve 25 is also to left dislocation, make the platen 28 on it that masterpiece is used for the pole plate affixed with it, thereby by the tested cotton of pole plate extruding.The reference value of its extruding force is the previous moulding pressure value of adjusting, and is 735 ± 49 newton.When reaching this value, inner sleeve 21 is that pawl groove 5 on it is aimed at retaining pawls 6 to the degree of left dislocation in sliding cavity 17 just, at this moment retaining pawl 6 just trip dog go into pawl groove 5 and lock.Thereby even the operator leaves handle 1 with hand, inner sleeve 21 can be because of the restoring force of pressure spring 26 rollback to the right, so can guarantee the constant voltage locking yet.After operating personnel test and record finish, carry out regain to the cotton of next batch when measuring, as long as click by bar 9, make retaining pawl 6 leave pawl groove 5 and get final product with hand, inner sleeve 21 at this moment just can be able to rollback.

Claims (1)

1, a kind of pressing mechanism, form by frame (29), gear shaft (18), handle (1), gear (19), inner sleeve (21), holding screw (20), push rod (23), pressure spring (26), outer sleeve (25), platen (28), pointer cushion block (4), pointer (2), holder (16), it is characterized in that the not end of described inner sleeve (21) offers pawl groove (5); On described holder (16), offer retaining pawl groove (15) and have additional a constant voltage locking device, it is by little spring (10), small rack (8), check plate (7), retaining pawl (6), presses bar (9) formation, and little spring (10) places on the holder (16).And with the back end in contact of check plate (7), small rack (8) is fixed on the holder (16), the middle part of check plate (7) and small rack (8) loose joint, retaining pawl (6) is positioned at the front end of check plate (7), and be positioned at retaining pawl groove (15), and corresponding with described pawl groove (5), be fixed on the rear end of check plate (7) by bar (9).

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