CN201851440U

CN201851440U - Mechanical locking device

Info

Publication number: CN201851440U
Application number: CN2010205488837U
Authority: CN
Inventors: 李国根; 关福州; 甘晋蜀; 周和沛
Original assignee: Jiujiang Precision Measuring Technology Research Institute
Current assignee: Jiujiang Precision Measuring Technology Research Institute
Priority date: 2010-09-29
Filing date: 2010-09-29
Publication date: 2011-06-01
Anticipated expiration: 2020-09-29

Abstract

The utility model relates to a mechanical locking device, which consists of a main shaft, a brake disc, a locking support seat assembly, a cam assembly and a handle mechanism, wherein the main shaft is arranged in a base hole along with a bearing and a bearing seat, the brake disc is fixed on a shaft shoulder of the main shaft, the edge of the brake disc is positioned in a space reserved by the upper plane of a support seat of the locking support seat assembly and a hook-shaped press block, the cam assembly is sheathed at a step part of a bearing end cover, and the handle mechanism and the locking support seat assembly are orderly fixed on a plane circle of the base. The mechanical locking device has the advantages that the positioning locking force is exerted on a turntable shaft system so that the shaft system can be locked in any angle, and the mechanical locking device has the characteristics that the structure is simple and compact, the operation is convenient and easy, and two marks: the releasing mark and the locking mark exist.

Description

A kind of mechanical locking device

Technical field

The utility model technology is a kind of mechanical locking device that is used for turntable shaft system.System provides positioning and locking power for turntable shaft, makes axle tie up to the arbitrary position and all can lock.And provide enough coupling mechanism forces.

Background technique

Drift takes place test brings uncertain error to inertance element in order to solve position upper angle that turntable shaft ties up to setting, need carry out locking and positioning to turntable shaft system, the method that the locking of existing turntable shaft system is adopted usually is: 1) electromagnet locking mode; 2) 3 locking modes of thin-walled cover; This dual mode, though can reach purpose to the locking of axle system, shortcoming clearly: 1) electromagnet locking mode, time length can make the magnetization of turntable stage body, cause measured piece (inertance element) also to be subjected to magnetic interference; The phenomenon that thin-walled overlaps seize plucking main shaft and causes the locking main shaft takes place in 2) 3 locking modes of thin-walled cover often.

The model utility content

The purpose of this utility model provides a kind of mechanical precise locking device that is used for, system applies positioning and locking power to turntable shaft, make axle tie up to arbitrarily angled equal can locking, have simple in structure, compact, easy to operate, light, disengagement is arranged and locks the characteristics of two kinds of signs.

The technological scheme that its technical problem that solves the utility model adopts is: a kind of mechanical locking device, form by brake disc, locking mounting assembly, cam pack and handle mechanism that main shaft, pedestal and main shaft fuse; Main shaft is installed in the pedestal hole with bearing and bearing support, brake disc is fixed on the shaft shoulder of main shaft, the edge of brake disc is in the space that plane and hook-shaped briquetting are reserved on the bearing of locking mounting assembly, cam pack is enclosed within the step place of bearing (ball) cover, handle mechanism and locking mounting assembly are fixed on the flat circle of pedestal in order, the gear of handle mechanism and the engagement of the tooth bar of cam pack, three groups of locking mounting assemblies are corresponding with three cam bits of cam pack, and the roller on the traveller of locking mounting assembly is pressing cam bit.

Described handle mechanism comprises handle, gear and gear shaft, wherein handle threaded end and gear shaft link into an integrated entity, gear is installed on the gear shaft shaft shoulder, radial and axial spacing with flat key and nut, make it to fuse with gear shaft, gear support is fixed on the pedestal, and gear shaft can rotate in gear support.

Described cam pack, comprise cam bit, cam seat ring and tooth bar, three uniform being fixed on the cam seat ring circumference of cam bit, tooth bar is fixed therein two cam bit position intermediate, with cam seat ring circle together, and fuse, the cam seat ring is installed on the step shoulder neck of the bearing (ball) cover that pedestal links into an integrated entity, and makes the rack and pinion engagement and is provided with the cover plate axial limiting.

Described locking mounting assembly, comprise the locking bearing, lock bracket, traveller and hook-shaped briquetting etc., three groups of locking mounting assemblies are distributed on the circumferential position corresponding with cam bit, the locking bearing is fixed on the pedestal, lock bracket is fixed on the side of locking bearing, pin is fixed on the lock bracket, and hook-shaped briquetting is enclosed within on the pin, and with pin be that axle rotates, the adjustment screw passes hook-shaped briquetting and is connected on the locking bearing, spring housing is pressed to the locking bearing adjusting on the screw with hook-shaped briquetting tail end, and push rod is fixed on upper/lower positions in the hook-shaped briquetting, contact with traveller, roller is movably connected in by pin in the open ended slot of traveller, can make circular movement around pin, and spring housing is on the tail end of traveller, pack into and lock in the pilot hole of bearing, push down with spring bearer plate, traveller is pressed to cam bit, roller is reliably contacted with cam bit by elastic force.

Described brake disc is fixedlyed connected with main shaft and is integral, can be with main axis rotation, and the brake disc edge is in the space that locking bearing and hook-shaped briquetting reserve.

The mechanical locking device structural principle: locking device belongs to a kind of pure mechanical positioner, it is that gear transmission by pair of meshing realizes its locking purpose, tooth bar and three cam bits that are uniformly distributed along the circumference are fixed on the seat ring in order, cylindrical had formed the certain height difference of involute when cam bit was installed, the cam seat ring is under the driving of gear pair, cam bit comes and goes from low to high or from high to low and moves in a circle, traveller becomes round straight line motion by roller extruding rotation, hook-shaped briquetting is subjected to spring and adjusts the pressure of screw, all the time be close to the junction plane of locking bearing, but under the effect of push rod, also be that axle rotates with the pin, when traveller moves outside circumference, push rod overcomes the pressure of spring the also past outer displacement of the tail end of hook-shaped briquetting, this moment, the hook-shaped end of hook-shaped briquetting was that fulcrum is pressed to brake disc with the pin, brake disc is pressed within hook-shaped position and the locking bearing end face, thereby with shaft locking.Advantage of the present utility model is:

1) simple in structure, compact, easy to operate, light, have and throw off and lock two kinds of signs.

2) coupling mechanism force is big, and locating stiffness is good, to the no any interpolation power of axle system.

3) utilize 3 basic principles that determine a face, change the mode of dumb bell shaft into, overcome the shortcoming and defect of above-mentioned two kinds of locking modes well to the roof pressure elastic linear by radially direct seize.

Description of drawings

Fig. 1 is the utility model structural drawing;

Fig. 2 is an A-A sectional structure schematic representation among Fig. 1.

Embodiment:

Embodiment, as depicted in figs. 1 and 2, mechanical locking device mainly is made up of with brake disc 1, locking mounting assembly, cam pack and handle mechanism that main shaft 19 fuses main shaft 19, pedestal 21; Main shaft 19 is installed on the pedestal hole of pedestal 21 with bearing and bearing support, brake disc 1 is fixed on the shaft shoulder of main shaft 19, the edge of brake disc 1 is in the space that plane and hook-shaped briquetting 6 reserved on the locking bearing 3, cam pack is enclosed within the step place of bearing (ball) cover 16, handle mechanism and locking mounting assembly are fixed on the flat circle of pedestal 21 in order, the gear 27 of handle mechanism and 20 engagements of the tooth bar of cam pack, three groups of locking mounting assemblies are corresponding with three cam bits 14 of cam pack, and the roller 12 on the traveller 2 of locking mounting assembly is pressing cam bit 14.

Described handle mechanism comprises handle 23, gear 27 and gear shaft 24, wherein handle 23 threaded end and gear shaft 24 link into an integrated entity, gear 27 is installed on gear shaft 24 shaft shoulders, and is radial and axial spacing with flat key 26 and nut 25, makes it to fuse with gear shaft 24.Gear support 22 is fixed on the pedestal 21, and gear shaft 24 can rotate in gear support 22.

Described cam pack, comprise cam bit 14, cam seat ring 15 and tooth bar 20, three cam bit 14 uniform being fixed on cam seat ring 15 circumference, tooth bar 21 is fixed on two cam bit 14 position intermediate, with cam seat ring 15 circle together, and fuse, cam seat ring 15 is installed on the step shoulder neck of the bearing (ball) cover 16 that pedestal 21 links into an integrated entity, and makes tooth bar 20 and gear 27 engagements, with cover plate 17 axial limitings, cam seat ring 15 can be made circular movement, but can not move axially.

Described locking mounting assembly, comprise locking bearing 3, lock bracket 4, pin 5 and hook-shaped briquetting 6, three locking mounting assemblies are distributed on the circumferential position corresponding with cam bit 14, locking bearing 3 is fixed on the pedestal 21, lock bracket 4 is fixed on the side of locking bearing 3, pin 5 is fixed on the lock bracket 4, hook-shaped briquetting 6 is enclosed within on the pin 5, and with pin 5 be that axle rotates, adjustment screw 10 passes hook-shaped briquetting 6 and is connected on the locking bearing 3, and spring 9 is enclosed within to be adjusted on the screw 10, and hook-shaped briquetting 6 tail ends are pressed to locking bearing 3, impacting force can be regulated by adjusting screw 10, push rod 7 is fixed on upper/lower positions in the hook-shaped briquetting 6, contacts with traveller 2, and roller 12 is movably connected in the open ended slot of traveller 2 by pin 13, can make circular movement around pin 13, spring 11 is enclosed within on the tail end of traveller 2, packs into and locks in the pilot hole of bearing 3, pushes down with spring bearer plate 8, by elastic force traveller 2 is pressed to cam bit 14, roller 13 is reliably contacted with cam bit 14.

This mechanical locking device, brake disc 1 are fixedlyed connected with main shaft 19 and are integral, can be with main shaft 19 rotations.The edge is in the space of locking bearing 3 and 6 reservations of hook-shaped briquetting.

During locking, handle 23 turns to locked position, gear shaft 24 driven gears 27 rotating certain angle, drive cam seat ring 15 with tooth bar 21 and also rotate corresponding angle, be distributed on the cam seat ring 15 three cam bits 14 and forward peak to by low spot simultaneously, traveller 2 under the extruding of roller 12 to the circumference outer displacement to limit position, hook-shaped briquetting 6 is subjected to the roof pressure of push rod 7 simultaneously, with pin 5 serves as that axle is done corresponding angle rotation, three uniform positions that the hook-shaped end while roof pressure of three uniform hook-shaped briquettings 6 brake disc 1, therefore brake disc 1 is subjected to hook-shaped briquetting 6 roof pressure generation resiliently deformables, brake disc 1 reverse side of distortion is subjected to locking the shoring and produces the power of examining of grinding of step end face of bearing 3 again, along with hook-shaped briquetting 6 is rotated in place, brake disc 1 is lockable between hook-shaped briquetting end and locking bearing step surface and can not rotates, brake disc 1 is fixed as one with main shaft 19, so turntable shaft system is locked.

During disengagement, handle 23 forwards disengaged position to, gear shaft 24 driven gears 27 rotating certain angle, drive cam seat ring 15 with tooth bar 20 and rotate corresponding angle, three cam bits 14 that are distributed on cam seat ring 15 forward minimum point to by peak simultaneously, traveller 2 is under the elastic force effect of spring 11, follow and in circumference, move on to minimum point, hook-shaped briquetting 6 is equally under the elastic force effect of spring 9, with pin 5 is that fulcrum returns, brake disc 1 released making it freely rotated, thereby turntable shaft system can rotate freely.

Handle mechanism by with the rack drives cam seat ring transposition of gear engagement, can form the certain height difference of involute during the cam bit rotation, traveller is become along diametric straight line motion, and driving push rod, to make hook-shaped briquetting 6 be that axle rotates with the pin, its hook end portion roof pressure brake disc 1, make brake disc 1 produce the resiliently deformable of trace, brake disc 1 distortion back produces friction with locking bearing 3 end faces, this friction increases along with roof pressure power and becomes big, and utilize 3 principles that determine a plane, reach turntable shaft and tie up to the arbitrarily angled equal purpose that can lock.

Claims

1. mechanical locking device, by main shaft, brake disc, the locking mounting assembly, cam pack and handle mechanism are formed, it is characterized in that, main shaft is installed in the pedestal hole with bearing and bearing support, brake disc is fixed on the shaft shoulder of main shaft, the edge of brake disc is in the space that plane and hook-shaped briquetting are reserved on the bearing of locking mounting assembly, cam pack is enclosed within the step place of bearing (ball) cover, handle mechanism and locking mounting assembly are fixed on the flat circle of pedestal in order, the gear of handle mechanism and the engagement of the tooth bar of cam pack, three groups of locking mounting assemblies are corresponding with three cam bits of cam pack, and the roller on the traveller of locking mounting assembly is pressing cam bit.

2. a kind of mechanical locking device according to claim 1, it is characterized in that, described handle mechanism comprises handle, gear and gear shaft, wherein handle threaded end and gear shaft link into an integrated entity, gear is installed on the gear shaft shaft shoulder, radial and axial spacing with flat key and nut, make it to fuse with gear shaft, gear support is fixed on the pedestal.

3. a kind of mechanical locking device according to claim 1, it is characterized in that, described cam pack, comprise cam bit, cam seat ring and tooth bar, three uniform being fixed on the cam seat ring circumference of cam bit, tooth bar is fixed therein two cam bit position intermediate, with cam seat ring circle together, and fuse, the cam seat ring is installed on the step shoulder neck of the bearing (ball) cover that pedestal links into an integrated entity, and makes the rack and pinion engagement and is provided with the cover plate axial limiting.

4. a kind of mechanical locking device according to claim 1, it is characterized in that, described locking mounting assembly, comprise the locking bearing, lock bracket, traveller and hook-shaped briquetting etc., three groups of locking mounting assemblies are distributed on the circumferential position corresponding with cam bit, the locking bearing is fixed on the pedestal, lock bracket is fixed on the side of locking bearing, pin is fixed on the lock bracket, hook-shaped briquetting is enclosed within on the pin, and with pin be that axle rotates, the adjustment screw passes hook-shaped briquetting and is connected on the locking bearing, and spring housing is being adjusted on the screw, and hook-shaped briquetting tail end is pressed to the locking bearing, push rod is fixed in the hook-shaped briquetting upper/lower positions and contacts with traveller, is provided with pin in the open ended slot of traveller and flexibly connects roller.

5. a kind of mechanical locking device according to claim 1 is characterized in that, described brake disc is fixedlyed connected with main shaft and is integral, and with main axis rotation, the brake disc edge is in the space that locking bearing and hook-shaped briquetting reserve.