CN204718794U - A kind of extravehicular space suit upper limb joint life test apparatus - Google Patents
A kind of extravehicular space suit upper limb joint life test apparatus Download PDFInfo
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- CN204718794U CN204718794U CN201520443553.4U CN201520443553U CN204718794U CN 204718794 U CN204718794 U CN 204718794U CN 201520443553 U CN201520443553 U CN 201520443553U CN 204718794 U CN204718794 U CN 204718794U
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Abstract
The utility model provides a kind of extravehicular space suit upper limb joint life test apparatus, comprises frame and driving mechanism and the fixed mechanism of being located at described framework soleplate; Wherein: described driving mechanism comprises shoulder driving mechanism and ancon driving mechanism, and described fixed mechanism is located at the center of framework soleplate, described shoulder driving mechanism and described ancon driving mechanism are placed in the both sides of described fixed mechanism respectively; Extravehicular space suit upper limbs is installed on described fixed mechanism, and described extravehicular space suit upper limbs is built-in with joint arm.Make for space suit by the joint arm being placed in space suit upper limbs inside, moment passes to space suit upper limbs by built-in arm, more meets the feature of space suit use and then make the life test results of space suit closer to truth.
Description
Technical field
The utility model relates to a kind of detection technique field of space suit, is specifically related to a kind of extravehicular space suit upper limb joint life test apparatus.
Background technology
As the most important life protection-gear of spacefarer in extravehicular activity; extravehicular space suit is in its use procedure; its basic expressions form lost efficacy is " activity of arm makes upper limbs bend, and repeatedly bends and causes fatigue of materials, finally cause gas leakage when fatigue of materials acquires a certain degree ".So for the development of space suit, know that the life-span of the bending associated components of space suit upper limbs is particularly important in advance.
Current research is obtain the data that can characterize its life-span by the method for test in the way comparatively reliably generally adopted.Because the movable life-span of space suit upper limbs is all the rank of hundreds thousand of times, so it is obviously worthless for obtaining space suit lifetime data by the method for man-made chamber.Research at present for the experimental provision obtaining data comprises:
Paper " research of the flexible simple joint test macro of space suit; machine-building; 2008 (3) " devises the flexible simple joint test macro of space suit, system adopts external direct measuring method, there is two movements and a rotational freedom, two one-movement-freedom-degrees are realized by guide rail-slide block mechanism, and rotational freedom place is provided with the rotational angle that photoelectric code disk measures joint, and end is provided with torque sensor and measures joint damping torque.This device adopts guide rail-slide block mechanism to drive space suit upper limbs simple joint to drive, for the detection of flexible joint damping torque.This device also can drive joint motions of space suit, but speed is slow, complex structure, and the life-span of itself obviously can not be used for the detection experiment of space suit sport life span lower than the sport life span of space suit;
Patent of invention CN102303315B discloses a kind of pneumatic actuation two degrees of freedom flexible mechanical arm assembly and control method, and wherein device comprises flexible mechanical arm body, pneumatic actuation part and control section.Flexible mechanical arm body one end is free end, and the other end is stiff end, and stiff end is arranged on the swing ring flange of oscillating cylinder by swinging ring flange mechanical connecting device.The rotational angle of oscillating cylinder is detected by photoelectric encoder, and the displacement of moving cylinder without bar is detected by linear grid ruler.Be pasted with multi-disc piezoelectric ceramic piece respectively as piezoelectric patches sensor and piezoelectric actuator at flexible mechanical arm stiff end, free end installs an acceleration transducer.Piezoelectric sensor or acceleration transducer can detect the vibration of flexible mechanical arm.This device relates to rectilinear motion and planar movement, can not directly apply to the life test of extravehicular space suit upper extremity exercise.
Space suit upper limbs comprises shoulder joint and elbow joint two significant points, is all by high-tensile, but the material of inflexibility and compression makes, and forms flat pleated, corrugated or tangerine flap-type structure makes it bend by more sheets.When carrying out the life test of extravehicular space suit upper extremity exercise, bending joint is driven by external force, the upper extremity exercise of simulation people, but because clothes upper limbs inside does not have arm, when shoulder joint and elbow joint are bent or stretch, can there is random variation in center of its motion, when when dressing space suit with people, arm drives space suit upper extremity exercise, situation is inconsistent, causes test findings unreliable.
Utility model content
In view of this, the utility model provides a kind of extravehicular space suit upper limb joint life test apparatus, and be intended to make in the durability test process to extravehicular space suit upper extremity exercise, its moment transmission is more close to real use state.
The technical solution adopted in the utility model is specially:
A kind of extravehicular space suit upper limb joint life test apparatus, comprises frame and driving mechanism and the fixed mechanism of being located at described framework soleplate; Wherein:
Described driving mechanism comprises shoulder driving mechanism and ancon driving mechanism, and described fixed mechanism is located at the center of framework soleplate, and described shoulder driving mechanism and described ancon driving mechanism are placed in the both sides of described fixed mechanism respectively;
Extravehicular space suit upper limbs is installed on described fixed mechanism, and described extravehicular space suit upper limbs is built-in with joint arm.
In above-mentioned extravehicular space suit upper limb joint life test apparatus, described joint arm comprises the shoulder fixed arm, upper arm axle sleeve, upper arm axle and the forearm that are connected successively, and the shoulder fixed arm at two ends and forearm insert in the linear bearing of described shoulder driving mechanism and described ancon driving mechanism respectively by shoulder driving shaft and wrist driving shaft.
In above-mentioned extravehicular space suit upper limb joint life test apparatus, described shoulder fixed arm is connected with shoulder driving shaft by the first linkage unit, described first linkage unit comprises shoulder driving-disc and shoulder flange, described shoulder driving shaft is welded in the circle centre position of the first side of described shoulder driving-disc, described shoulder driving-disc is along the circumferential direction distributed with some through holes, first side of described shoulder flange is distributed with the position threaded hole all corresponding with described through hole with size, screw one is through the through hole mated with it, thread pore structure, described shoulder driving-disc is connected with described shoulder flange.
In above-mentioned extravehicular space suit upper limb joint life test apparatus, the second center, side of described shoulder flange is provided with groove, is along the circumferential direction distributed with for the stepped counterbore that is connected with shoulder fixed arm in groove.
In above-mentioned extravehicular space suit upper limb joint life test apparatus, described shoulder fixed arm is stepped cylinder one, the end face of the large end cylinder of described stepped cylinder one is along the circumferential direction distributed in several threaded holes m, the position of threaded hole m is all corresponding with the stepped counterbore of described shoulder flange with size, countersunk head socket head cap screw one is through the threaded hole m, the stepped counter bore structure that mate with it, be connected with described shoulder fixed arm by described shoulder flange, the small end termination of described stepped cylinder one is provided with the radial direction through hole a for being connected with upper arm axle sleeve.
In above-mentioned extravehicular space suit upper limb joint life test apparatus, the cylinder of described upper arm axle sleeve to be one end be prong like, the basal diameter of the size between two forks of described prong like and the small end cylinder of described shoulder fixed arm matches, described two forks are respectively equipped with through hole b along cylinder radial direction, the position of described through hole b and described radial direction through hole a, size is all corresponding, bearing pin one inserts the radial direction through hole b mated with it, in through hole a, described upper arm axle sleeve is connected with described shoulder fixed arm, described bearing pin one is fixed by split pin two, described cylinder end is provided with for realizing with described upper arm axle the radial direction through hole c that is connected.
In above-mentioned extravehicular space suit upper limb joint life test apparatus, described upper arm axle is the stepped cylinder two of an end band opening fork, the diameter of the small end cylindrical section of described stepped cylinder two and the barrel bore of described upper arm axle sleeve match, described small end cylindrical section has rectangular through hole d vertically, described small end cylindrical section inserts in the mode of clearance fit in the cylinder of upper arm axle sleeve, fixed pin radially inserts in the radial direction through hole c of upper arm axle sleeve and the rectangular through hole d of upper arm axle, make the roundlet shell of column of arm axle flexible in the cylinder of upper arm axle sleeve, the large end of stepped cylinder two is opening fork structure, two openends of opening fork structure are respectively equipped with for realizing with described forearm the through hole e that is connected.
In above-mentioned extravehicular space suit upper limb joint life test apparatus, described forearm is stepped cylinder three, the end of the small end cylinder of described stepped cylinder three is milled with the plane that has certain length vertically, this plane is provided with radial direction through hole f, the position of described radial direction through hole f, size is all corresponding with the through hole e on described upper arm axle, the small end cylinder of the small end cylinder of described stepped cylinder three is inserted in the opening fork of described upper arm axle in the mode of clearance fit, bearing pin two is inserted the through hole e mated with it, radial direction through hole f, described forearm is connected with described upper arm axle, described bearing pin two is fixed by split pin one.
In above-mentioned extravehicular space suit upper limb joint life test apparatus, the large end cylinder of described stepped cylinder three is connected with wrist driving shaft by the second linkage unit; Particularly:
Described second linkage unit comprises wrist driving-disc and wrist flange, described wrist driving shaft is welded in the circle centre position of the first side of described wrist driving-disc, described wrist driving-disc is along the circumferential direction distributed with some through holes, second side of described wrist flange is distributed with the position threaded hole all corresponding with through hole with size, described wrist driving-disc, through the through hole, the thread pore structure that mate with it, is connected with described wrist flange by screw two.
The end face of the large end cylinder of described stepped cylinder three is along the circumferential direction distributed with several threaded holes n, and the position of described threaded hole n is corresponding with the stepped counterbore of described wrist flange with size;
First side of described wrist flange is provided with groove, stepped appearance counterbore is circumferentially provided with in groove, the position of stepped appearance counterbore and size with hold the threaded hole n on cylinder corresponding greatly, countersunk head socket head cap screw two is screwed into the threaded hole n, the stepped appearance counterbore that mate with it, described wrist flange is connected with described forearm.
The beneficial effect that the utility model produces is:
Test unit of the present utility model is placed in the joint arm of space suit upper limbs inside by introducing one, design the skeleton mechanism of the built-in arm comprised, by the shoulder of space suit upper limbs, wrist are fixed with shoulder flange, wrist flange respectively, when from the joint motions of external force drive systems, for space suit, moment passes to space suit upper limbs by its built-in joint arm, more meets feature that space suit uses thus make the life test results more closing to reality of space suit.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, more completely the utility model can be understood better.Accompanying drawing described herein is used to provide further understanding of the present utility model, and embodiment and explanation thereof, for explaining the utility model, are not formed improper restriction of the present utility model.
Fig. 1 is the structural representation of a kind of extravehicular space suit upper limb joint of the utility model life test apparatus;
Fig. 2 is the structural representation of the joint arm of a kind of extravehicular space suit upper limb joint of the utility model life test apparatus;
Fig. 3 is the structural representation of a kind of extravehicular space suit upper limb joint of the utility model life test apparatus;
Fig. 4-1 is the structural representation of the shoulder fixed arm of a kind of extravehicular space suit upper limb joint of the utility model life test apparatus;
Fig. 4-2 is structural representations of the upper arm cover of a kind of extravehicular space suit upper limb joint of the utility model life test apparatus;
Fig. 5-1 is the structural representation of the upper arm axle of a kind of extravehicular space suit of the utility model upper limb joint life test apparatus;
Fig. 5-2 is forearm structure schematic diagram of a kind of extravehicular space suit upper limb joint of the utility model life test apparatus.
In figure:
100, frame 200, shoulder driving mechanism 300, ancon driving mechanism 400, joint arm 500, fixed mechanism 600, space suit upper limbs;
1, countersunk head socket head cap screw 1, shoulder driving shaft 3, shoulder driving-disc 4, screw 1, shoulder flange 6, shoulder fixed arm 7, bearing pin 1, upper arm axle sleeve 9, fixed pin 10, upper arm axle 11, bearing pin 2 12, forearm 13, screw 2 14, wrist driving-disc 15, wrist driving shaft 16, wrist flange 17, countersunk head socket head cap screw 2 18, split pin 1, split pin two;
Radial direction through hole: a, c, f;
Through hole: b, e;
Rectangular through hole: d;
Threaded hole: m, n.
Embodiment
Below in conjunction with drawings and Examples, the technical solution of the utility model is described in further detail.
A kind of extravehicular space suit upper limb joint life test apparatus as shown in Figure 1, mainly comprise frame 100, shoulder driving mechanism 200, ancon driving mechanism 300, the fixed mechanism 500 of extravehicular space suit, space suit upper limbs 600 and the joint arm 400 put in the inner and; Wherein:
Frame 100 is the L-type framed structures be made up of the base plate of horizontal direction and the riser of vertical direction, fixed mechanism 500 is fixed on the middle part of base plate, shoulder driving mechanism 200 and ancon driving mechanism 300 are positioned at the both sides of extravehicular space suit fixed mechanism 500, also base plate is fixed on, shoulder driving shaft 2 and the wrist driving shaft 15 (with reference to Fig. 2) at joint arm 400 two ends insert in the linear bearing of shoulder driving mechanism 200 and ancon driving mechanism 300 respectively, namely complete a kind of installation of extravehicular space suit upper limb joint life test apparatus.
As shown in Figure 2, joint arm 400 mainly comprises the shoulder fixed arm 6, upper arm axle sleeve 8, upper arm axle 10 and the forearm 12 that are connected successively, wherein:
Shoulder driving-disc 3 and shoulder flange 5 are the different circular flange dish (external diameter of shoulder flange 5 is greater than shoulder driving-disc 3) of external diameter, the shoulder driving shaft 2 of plain shaft structure is welded in the outside circle centre position of shoulder driving-disc 3, and shoulder driving-disc 3 is along the circumferential direction distributed with some through holes; The outside of shoulder flange 5 is circumferentially provided with several threaded holes corresponding with lead to the hole site and size, and through hole whorl pore structure is by being connected shoulder driving-disc 3 with shoulder flange 5 with the screw 1 of its coupling.
The medial center of shoulder flange 5 is provided with circular groove, in groove and circumferentially several through holes, have stepped counterbore in the circle distribution of shoulder flange 5 immediate vicinity, for being connected with shoulder fixed arm 6; Particularly:
With further reference to Fig. 4-1, shoulder fixed arm 6 is stepped cylinder, the large end end face of stepped cylinder circumferentially arranges four threaded hole m, the position of threaded hole m is corresponding with the position of the stepped counterbore of the circle distribution of the immediate vicinity along shoulder flange 5, the stepped counter bore structure of threaded hole is by being connected shoulder flange 5 with shoulder fixed arm 6 with the countersunk head socket head cap screw 1 of its coupling, and the small end termination of shoulder fixed arm 6 is provided with the radial direction through hole a for being connected with upper arm axle sleeve;
With further reference to Fig. 4-2, upper arm axle sleeve 8 is the cylinder of an end band prong like, the size of fork opening is mated with the small end of shoulder fixed arm 6, the vertical direction distribution of two forks is provided with through hole b, through hole b is corresponding with the position of radial direction through hole a, the small end cylinder of shoulder fixed arm 6 is inserted in the forked opening of upper arm axle sleeve 8, by with (radial direction through hole a, through hole b structure) upper arm axle sleeve 8 is connected with shoulder fixed arm 6 by the bearing pin 1 that matches, bearing pin one 7 is by split pin 2 19 fixing (with reference to Fig. 2), namely the connection of shoulder fixed arm 6 and upper arm axle sleeve 8 is completed, cylinder end is provided with for realizing with upper arm axle the radial direction through hole c that is connected.
With further reference to Fig. 5-1, upper arm axle 10 is the stepped cylinder of an end band opening fork, the end diameter of stepped cylinder and the barrel bore of upper arm axle sleeve 8 match, and have rectangular through hole d at small end, the small end cylinder of upper arm axle 10 is inserted in upper arm axle sleeve 8 cylinder and form clearance fit, fixed pin 9 is radially inserted in the radial direction through hole c of upper arm the axle sleeve 8 and rectangular through hole d of upper arm axle 10, the roundlet styletable of arm axle 10 can be stretched in the cylinder of upper arm axle sleeve 8, be subject to the restriction of fixed pin 9, can not deviate from cylinder can not rotate around it simultaneously; The large end of stepped cylinder is opening fork structure, and two openends of opening fork are respectively equipped with through hole e, for realizing being connected with forearm 12;
With further reference to Fig. 5-2, forearm 12 is stepped cylinder, and the large end cylinder end face of stepped cylinder is circumferentially distributed with several threaded holes n, and its position is corresponding with the stepped counterbore of shoulder flange 5 with size; The end of the small end cylinder of stepped cylinder mills out the plane that has certain length vertically, and is provided with radial direction through hole f on this plane, and the opening of plane and upper arm axle 10 pitches clearance fit;
The small end cylinder of forearm 12 is inserted in the opening fork of upper arm axle 10, the through hole e of all corresponding with it the upper arm axle 10 of the radial direction through hole f of forearm 12 and position, size is connected by bearing pin 2 11, split pin 1 is inserted in the circular hole of bearing pin 11 lower end, complete the connection of forearm 12 and upper arm axle 10.
Wrist flange 16 is a circular flange dish, several screws are circumferentially provided with outside it, inner side is provided with circular groove, stepped appearance counterbore is circumferentially provided with in groove, threaded hole n on the large end cylinder of the position of stepped appearance counterbore and size and forearm 12 matches, and connects wrist flange 16 and forearm 12 by countersunk head socket head cap screw 2 17; Wrist driving-disc 14 is a circular flange dish, circumferentially be provided with through hole, the threaded hole of its position and size and wrist flange 16 matches, and is connected by wrist flange 16 by screw 13 with wrist driving-disc 14, and the outer side center place of wrist driving-disc 14 is welded with the wrist driving shaft 15 of plain shaft structure.
With reference to Fig. 3, the course of work of test unit is:
Shoulder driving mechanism 200 drives the shoulder driving shaft 2 of joint arm 400, make shoulder fixed arm 6 with bearing pin 7 for rotation center, make it relative to the invariant position of shoulder flange 5, and turn an angle relative to upper arm axle sleeve 8, namely ensure that when carrying out durability test, the position of space suit upper limb shoulder arthrogryposis stretching routine remains unchanged;
Ancon driving mechanism 300 drives the wrist driving shaft 15 of joint arm 400, make forearm 12 with bearing pin 7 for rotation center, make it relative to the invariant position of wrist flange 16, and turn an angle relative to upper arm axle 10, namely ensure that when carrying out durability test, the position of space suit upper limbs elbow joint bending stretching routine remains unchanged;
In the cylinder of the upper arm axle sleeve 8 of the small end cylinder insert structure coupling of upper arm axle 10, for ensureing that upper arm axle 10 can be free to slide relative to upper arm axle sleeve 8, therebetween clearance fit is preferably, the distance between shoulder joint rotation center (bearing pin 1) and elbow joint rotation center bearing pin (bearing pin 2 11) is changed, with the space suit upper limbs making experimental provision adapt to different size by sliding.
In test unit of the present utility model, after the shoulder of space suit upper limbs 600, wrist mouth are connected with shoulder flange 5, wrist flange 16 respectively, the middle part of frame 100 is fixed on by fixed mechanism 400, two ends then simulate the action of people's upper limbs respectively by the oscillating cylinder alternation of shoulder driving mechanism 200 and ancon driving mechanism 300, the shoulder joint of space suit upper limbs 600 and elbow joint is made to do bending and stretching routine, thus the repeatedly motion achieved for extravehicular space suit upper limb joint, realize the durability test for space suit upper limbs.
Below explain embodiment of the present utility model by reference to the accompanying drawings, accompanying drawing is herein used to provide further understanding of the present utility model.Obviously; the foregoing is only the utility model preferably embodiment; but protection domain of the present utility model is not limited thereto; any be to one skilled in the art can expect easily, do not depart from change of the present utility model or replacement in fact, be also all included within protection domain of the present utility model.
Claims (8)
1. an extravehicular space suit upper limb joint life test apparatus, is characterized in that, comprises frame and driving mechanism and the fixed mechanism of being located at described framework soleplate; Wherein:
Described driving mechanism comprises shoulder driving mechanism and ancon driving mechanism, and described fixed mechanism is located at the center of framework soleplate, and described shoulder driving mechanism and described ancon driving mechanism are placed in the both sides of described fixed mechanism respectively;
Extravehicular space suit upper limbs is installed on described fixed mechanism, and described extravehicular space suit upper limbs is built-in with joint arm.
2. extravehicular space suit upper limb joint life test apparatus according to claim 1, it is characterized in that, described joint arm comprises the shoulder fixed arm, upper arm axle sleeve, upper arm axle and the forearm that are connected successively, and the shoulder fixed arm at two ends and forearm insert in the linear bearing of described shoulder driving mechanism and described ancon driving mechanism respectively by shoulder driving shaft and wrist driving shaft.
3. extravehicular space suit upper limb joint life test apparatus according to claim 2, it is characterized in that, described shoulder fixed arm is connected with shoulder driving shaft by the first linkage unit, described first linkage unit comprises shoulder driving-disc and shoulder flange, described shoulder driving shaft is welded in the circle centre position of the first side of described shoulder driving-disc, described shoulder driving-disc is along the circumferential direction distributed with some through holes, first side of described shoulder flange is distributed with the position threaded hole all corresponding with described through hole with size, screw one is through the through hole mated with it, thread pore structure, described shoulder driving-disc is connected with described shoulder flange, second center, side of described shoulder flange is provided with groove, is along the circumferential direction distributed with for the stepped counterbore that is connected with shoulder fixed arm in groove.
4. extravehicular space suit upper limb joint life test apparatus according to claim 3, it is characterized in that, described shoulder fixed arm is stepped cylinder one, the end face of the large end cylinder of described stepped cylinder one is along the circumferential direction distributed in several threaded holes m, the position of threaded hole m is all corresponding with the stepped counterbore of described shoulder flange with size, countersunk head socket head cap screw one is through the threaded hole m mated with it, stepped counter bore structure, described shoulder flange is connected with described shoulder fixed arm, the small end termination of described stepped cylinder one is provided with the radial direction through hole a for being connected with upper arm axle sleeve.
5. extravehicular space suit upper limb joint life test apparatus according to claim 4, it is characterized in that, the cylinder of described upper arm axle sleeve to be one end be prong like, the basal diameter of the size between two forks of described prong like and the small end cylinder of described shoulder fixed arm matches, described two forks are respectively equipped with through hole b along cylinder radial direction, the position of described through hole b and described radial direction through hole a, size is all corresponding, bearing pin one inserts the radial direction through hole b mated with it, in through hole a, described upper arm axle sleeve is connected with described shoulder fixed arm, described bearing pin one is fixed by split pin two, described cylinder end is provided with for realizing with described upper arm axle the radial direction through hole c that is connected.
6. extravehicular space suit upper limb joint life test apparatus according to claim 5, it is characterized in that, described upper arm axle is the stepped cylinder two of an end band opening fork, the diameter of the small end cylindrical section of described stepped cylinder two and the barrel bore of described upper arm axle sleeve match, described small end cylindrical section has rectangular through hole d vertically, described small end cylindrical section inserts in the mode of clearance fit in the cylinder of upper arm axle sleeve, fixed pin radially inserts in the radial direction through hole c of upper arm axle sleeve and the rectangular through hole d of upper arm axle, make the roundlet shell of column of arm axle flexible in the cylinder of upper arm axle sleeve, the large end of stepped cylinder two is opening fork structure, two openends of opening fork structure are respectively equipped with for realizing with described forearm the through hole e that is connected.
7. extravehicular space suit upper limb joint life test apparatus according to claim 6, it is characterized in that, described forearm is stepped cylinder three, the end of the small end cylinder of described stepped cylinder three is milled with the plane that has certain length vertically, this plane is provided with radial direction through hole f, the position of described radial direction through hole f, size is all corresponding with the through hole e on described upper arm axle, the small end cylinder of the small end cylinder of described stepped cylinder three is inserted in the opening fork of described upper arm axle in the mode of clearance fit, bearing pin two is inserted the through hole e mated with it, radial direction through hole f, described forearm is connected with described upper arm axle, described bearing pin two is fixed by split pin one.
8. extravehicular space suit upper limb joint life test apparatus according to claim 1, is characterized in that, the large end cylinder of described stepped cylinder three is connected with wrist driving shaft by the second linkage unit; Particularly:
Described second linkage unit comprises wrist driving-disc and wrist flange, described wrist driving shaft is welded in the circle centre position of the first side of described wrist driving-disc, described wrist driving-disc is along the circumferential direction distributed with some through holes, second side of described wrist flange is distributed with the position threaded hole all corresponding with through hole with size, described wrist driving-disc, through the through hole, the thread pore structure that mate with it, is connected with described wrist flange by screw two;
The end face of the large end cylinder of described stepped cylinder three is along the circumferential direction distributed with several threaded holes n, and the position of described threaded hole n is corresponding with the stepped counterbore of described wrist flange with size;
First side of described wrist flange is provided with groove, stepped appearance counterbore is circumferentially provided with in groove, the position of stepped appearance counterbore and size with hold the threaded hole n on cylinder corresponding greatly, countersunk head socket head cap screw two is screwed into the threaded hole n, the stepped appearance counterbore that mate with it, described wrist flange is connected with described forearm.
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| CN201520443553.4U CN204718794U (en) | 2015-06-25 | 2015-06-25 | A kind of extravehicular space suit upper limb joint life test apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913925A (en) * | 2015-06-25 | 2015-09-16 | 北京建筑大学 | Extravehicular spacesuit upper-limb joint service life testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913925A (en) * | 2015-06-25 | 2015-09-16 | 北京建筑大学 | Extravehicular spacesuit upper-limb joint service life testing device |
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