A kind of centralizer
Technical field
The utility model belongs to industrial field of fixtures, particularly relates to a kind of centralizer.
Background technology
In machinery production, process, often can run into the situation needing to use centralizer.Centralizer is a kind of fixture needing first to determine Clamping Center, in order to adapt to the clamping of different size or shape workpiece, ensures that workpiece can stable and accurately be located.Such as, position clamping with same centralizer to a rectangle frame and a ladder-shaped frame, clamp central position is different, now needs the center of first fixing fixture, then completes clamping.Otherwise, if just being opened by clamp structure of blindness compresses with absorption surface, be difficult to ensure that the equilibrium to each position clamps and can not ensure that workpiece necessarily can be completely fixed by each clamping part.Adjective-centre structure in current centralizer, general employing is risen the modes such as lobe, the ball that rises, liquid plastics, chuck, by mechanical movement or utilize material pressurized expansion characteristics formed location dimension increase, and it is identical to increase degree relative to center, reach self centering object, self-centering unit is usually used in location, hole, also locates for groove.But the lobe that rises, rise the centering machine such as ball, liquid plastics complex structure, and need adopt special material, cost of manufacture is too high; Moreover, in use the centre of location cannot be adjusted, be not suitable with in small lot batch manufacture or trial-production processing, the centered positions often caused because of situations such as blank deviation, design alterations can not adapt to the situation of workpiece, and need mobile, fixing whole fixture completes centering process again again, effort of taking a lot of work.
Utility model content
The utility model is to overcome the deficiency that in prior art, centralizer structure is too complicated, cost of manufacture is high, the centre of location can not regulate temporarily, provide a kind of structure comparatively advantages of simple, clamping position can be carried out to workpiece fast, and adaptability adjustment can be carried out to the centre of location in position fixing process, thus whole fixture can be avoided to need the centralizer of integral shift.
To achieve these goals, the utility model is by the following technical solutions:
A kind of centralizer, comprise support body, left polarized latch, right polarized latch, described support body comprises base, two vertical portions, described left polarized latch comprises left bar threaded portion, left bar homalocephalus portion, described left bar homalocephalus portion section is square or rectangle, described right polarized latch comprises right bar threaded portion, right bar homalocephalus portion, described right bar homalocephalus portion section is square or rectangle, described left bar threaded portion, right bar threaded portion is respectively threaded with a vertical portion, left bar threaded portion, the thread rotary orientation of right bar threaded portion is contrary, described left polarized latch is arranged with locking nut, described left polarized latch, positioning sleeve is provided with between right polarized latch, described positioning sleeve is by left trepanning, right trepanning respectively with left bar homalocephalus portion, right bar homalocephalus portion connects, described positioning sleeve comprises cover body, flange part, the side of described locking nut one side contacts flange part, the outermost end of described left bar threaded portion is provided with flat spin slot.
As preferably, the lower-left hole consistent with left cover hole shape is provided with below described left trepanning, left trepanning, hole, lower-left are communicated with by shift holes, flush at the bottom of the hole of described shift holes with at the bottom of the hole of left trepanning, the free hole communicated with right trepanning following side is provided with below described right trepanning, described free pore cross section width, length are all greater than right cover pore cross section maximum caliber, described flange part be provided with to penetrate in hole, lower-left, for the clamping screw of fixing left bar homalocephalus, described right cover hole depth is less than 2/3rds of free hole depth.
As preferably, described base is provided with record mud pan, is provided with color mud or plasticine in described record mud pan, and described record mud pan is in immediately below positioning sleeve, and described record mud pan and the vertical rod be on base are slidably connected, and glide direction is vertical.
The beneficial effects of the utility model are: structure is simple, without the need to the centring elements of precision; Can fix Clamping Center effectively and rapidly and clamp workpiece, in clamping process, if find centre of location skew or position deviation to some extent, can adjust, clamping strong adaptability, regulated efficiency be high.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment 1;
Fig. 2 is the structural representation of the utility model embodiment 2;
Fig. 3 is the sectional view of positioning sleeve in the utility model embodiment 2.
In figure: support body 1, base 11, vertical portion 12, left polarized latch 2, left bar threaded portion 21, left bar homalocephalus portion 22, flat spin slot 23, locking nut 24, right polarized latch 3, right bar threaded portion 31, right bar homalocephalus portion 32, positioning sleeve 4, cover body 41, flange part 42, hole, lower-left 5, shift holes 6, free hole 7, clamping screw 8, record mud pan 9, vertical rod 10.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
Embodiment 1: in embodiment as shown in Figure 1, a kind of centralizer, comprises support body 1, left polarized latch 2, right polarized latch 3, described support body 1 comprises base 11, two vertical portions 12, described left polarized latch 2 comprises left bar threaded portion 21, left bar homalocephalus portion 22, described left bar homalocephalus portion 22 section is square or rectangle, and described right polarized latch 3 comprises right bar threaded portion 31, right bar homalocephalus portion 32, described right bar homalocephalus portion 32 section is square or rectangle, described left bar threaded portion 21, right bar threaded portion 31 is respectively threaded with a vertical portion 12, left bar threaded portion 21, the thread rotary orientation of right bar threaded portion 31 is contrary, described left polarized latch 2 is arranged with locking nut 24, described left polarized latch 2, be provided with positioning sleeve 4 between right polarized latch 3, described positioning sleeve 4 is by left trepanning, right trepanning respectively with left bar homalocephalus portion 22, right bar homalocephalus portion 32 connects, and described positioning sleeve 4 comprises cover body 41, flange part 42, the side of described locking nut 24 1 side contacts flange part 42, the outermost end of described left bar threaded portion 21 is provided with flat spin slot 23.
Before using, by measuring the extension elongation of the left polarized latch 2 of adjustment, right polarized latch 3, make the locating surface of two polarized latch symmetrical about the centre of location; Workpiece is put well in fixture, makes polarized latch, locating slot that right polarized latch 3 is positioned at workpiece, utilize instrument to clamp flat spin slot 23 part, turn locking nut 24, positioning sleeve 4 fixed.Because the thread rotary orientation of left bar threaded portion 21, right bar threaded portion 31 is contrary, therefore positioning sleeve 4 can drive two polarized latch stretch out simultaneously or shrink.Therefore can rotate positioning sleeve 4 makes left bar threaded portion 21, right bar threaded portion 31 stretch out, and allows the two outer face all compress with absorption surface, completes centering location.And before use or according to the situation such as blank, design alteration adjustment the centre of location time, method of adjustment is as follows: first unclamp locking nut 24; Utilizing instrument to clamp flat spin slot 23 position drives left polarized latch 2 stretch out or screw in, until the symmetrical centre of left polarized latch 2, right polarized latch 3 outer face arrives preposition; Just can continue flat spin slot 23 position of clamping left polarized latch 2, keep it relative constant with position, vertical portion 12, screw locking nut 24 simultaneously, complete the adjustment of the centre of location.
Embodiment 2: the basic structure of the present embodiment and embodiment are with embodiment 1, its difference is, as Fig. 2, shown in Fig. 3: be provided with the lower-left hole 5 consistent with left cover hole shape below described left trepanning, left trepanning, hole, lower-left 5 is communicated with by shift holes 6, flush with at the bottom of the hole of left trepanning at the bottom of the hole of described shift holes 6, the free hole 7 communicated with right trepanning following side is provided with below described right trepanning, described free hole 7 section width, length is all greater than right cover pore cross section maximum caliber, described flange part 42 is provided with and penetrates in hole, lower-left 5, for the clamping screw 8 of fixing left bar homalocephalus, described right cover hole depth is less than 2/3rds of free hole 7 degree of depth.Described base 11 is provided with record mud pan 9, and be provided with color mud or plasticine in described record mud pan 9, described record mud pan 9 is in immediately below positioning sleeve 4, and described record mud pan 9 is slidably connected with the vertical rod 10 be on base 11, and glide direction is vertical.
In the present embodiment, the centre of location adjustment function in many clamping process.When clamping, often there will be the inaccurate one end that causes of centre of location initial setting and clamping situation not in place.The problem readjusting integral clamp is needed under this situation.When initial location support body 1, error and surplus all can be taken into account, allow the default surplus of the centre of location be partial to right, namely allow support body 1 suitably keep right fixing.Under this situation, can, first according to normal operating, right polarized latch 3 be allowed first to put in place, to contact workpiece pressing.Then instrument can be utilized to clamp flat spin slot 23, unclamp locking nut 24, positioning sleeve 4 is slided, allows left bar homalocephalus portion 22 enter hole, lower-left 5, complete freedom of entry hole 7, right bar homalocephalus portion 32 completely, and utilize clamping screw 8 that left polarized latch 2 is fixed with positioning sleeve 4.Now, right polarized latch 3 just can not driven by positioning sleeve 4 again, only has left polarized latch 2 can be driven by positioning sleeve 4, now can screw back locking nut 24.Then move on record mud pan 9 being slided, make the color mud contact flange part 42 in it, reset after leaving first marking, turn positioning sleeve 4 drives left polarized latch 2 to move then, the clamping completing left polarized latch 2 puts in place, thus the clamping realizing two polarized latch puts in place.After putting in place, move on again record mud pan 9 being slided, make the color mud contact flange part 42 in it, reset after leaving second marking.In said process, do not need mobile whole fixture, just can complete the conversion of the centre of location, relatively many easily, the one end that also can better adapt to often occur in clamping process clamps the situation that can not put in place, and can ensure final clamping effect.And after the far-end range difference of two markings deducts the length of flange part 42, be exactly the new centre of location and preset the twice of locating centre distance difference, these data can to the accurate adjustment of chucking position and be convenient to the real change amount measuring the centre of location after handled easily person.
Also have a kind of situation, centre of location adjustment capability of the present utility model can also be used.After positioning action starts, finding or predict the centre of location presets inaccurate, now can record the distance that the centre of location needs adjustment, according to aforementioned principles, allow the twice of the first separately mobile positioning center adjustment of displacement amount of left polarized latch 2, then make positioning sleeve 4 reset to initial connection status, then continue drive two polarized latch and stretch out simultaneously, just can complete having clamped smoothly.