CN110131298B - Locking joint with high thermal stability - Google Patents
Locking joint with high thermal stability Download PDFInfo
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- CN110131298B CN110131298B CN201910316220.8A CN201910316220A CN110131298B CN 110131298 B CN110131298 B CN 110131298B CN 201910316220 A CN201910316220 A CN 201910316220A CN 110131298 B CN110131298 B CN 110131298B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/10—Arrangements for locking
- F16C11/103—Arrangements for locking frictionally clamped
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Clamps And Clips (AREA)
Abstract
The invention discloses a locking joint with high thermal stability, which comprises a first connecting piece 1, a second connecting piece 2, a constant pressure locking device 3, a rotating shaft assembly 4 and a low impact release device 5, wherein the first connecting piece is fixedly connected with the rotating shaft assembly; the first connecting piece 1 and the second connecting piece 2 are respectively fixedly connected with a rod piece, the first connecting piece 1 and the second connecting piece 2 form a rotating pair through a rotating shaft 42 and a bearing 43, the first connecting piece 1 and the second connecting piece 2 are hinged, two ends of the rotating shaft 42 are provided with constant-pressure locking devices 3 with constant pressing force, and the constant-pressure locking devices 3 can be locked through a low-impact releasing device 5. According to the invention, through reasonable layout of the constant pressure locking device 3, the rotating shaft assembly 4 and the low impact release device 5, two planes of the whole joint relative to the axis of the rod piece are symmetrical, and the problem of poor symmetry of the traditional locking joint is solved; the deformation of the flexible support 36 realizes the gapless locking along the axial direction, eliminates the locking gap of the traditional locking joint and improves the locking rigidity; through setting up level pressure preloading device and low impact release 5, guaranteed that pivot 42 both ends pretightning force equals, solved the poor problem of traditional locking joint thermal stability.
Description
Technical Field
The invention relates to a locking joint with high thermal stability, which is particularly suitable for a locking joint requiring constant locking force and having high requirement on thermal stability, and belongs to the technical field of spatial structure connecting mechanisms.
Background
The function of the locking joint is to rotate the two rods or structural members around the joint rotating shaft and lock the relative position relationship of the two rods or structural members at a specified position.
The locking joint commonly used in the field of spatial structure connecting mechanisms mainly has two forms: cam-type and latch-type. Both structural forms are generally symmetrical only about a certain plane of the axis of the connected rod, the structural symmetry is poor, and uneven thermal deformation can occur in a spatial thermal environment, so that the thermal stability of the whole mechanism is affected. Meanwhile, the locking force directions of the two structures are perpendicular to the axis direction of the joint rotating shaft, and the movement direction along the axis of the joint rotating shaft is not restrained or is slightly restrained, so that the rigidity of the whole mechanism is not improved.
Disclosure of Invention
The technical problem solved by the invention is as follows: the invention overcomes the defects of the prior art, provides a locking joint with high thermal stability, realizes that the joint structure is symmetrical to two planes passing through the axis of a connected rod piece through the locking of a constant-pressure pre-tightening device on a rotating shaft, further improves the structural symmetry, makes up the defect of poor structural symmetry of the traditional locking joint, and further improves the thermal stability of the joint; the zero clearance locking along the axial direction is realized through the positive pressure of the flexible part of the constant pressure locking device, the locking clearance of the traditional locking joint is eliminated, and meanwhile, the locking along the axial direction is realized through the high friction coatings at the two ends of the constant pressure locking device and the rotating shaft assembly, so that the problem of lower rigidity of the conventional locking joint is solved.
The technical solution of the invention is as follows: a high thermal stability locking joint comprising: the device comprises a first connecting piece (1), a second connecting piece (2), a constant pressure locking device (3), a rotating shaft assembly (4) and a low impact release device (5);
the first connecting piece (1) and the second connecting piece (2) can be fixedly connected with an external rod piece respectively, the first connecting piece (1) and the second connecting piece (2) are rotatably connected through the rotating shaft assembly (4), and the rotating shaft assembly (4) enables the first connecting piece (1) and the second connecting piece (2) to rotate relatively through the rotating shaft assembly (4), so that the first connecting piece (1) and the second connecting piece (2) are hinged; the two ends of the rotating shaft assembly (4) are provided with constant-pressure locking devices (3), and the constant-pressure locking devices (3) are released to be pressed to the two ends of the rotating shaft assembly (4) through the low-impact release device (5), so that the constant-pressure locking devices (3) provide constant pressing force for the two ends of the rotating shaft assembly (4); positive pressure provided by the constant pressure locking device (3) realizes axial movement locking of the rotating shaft assembly (4); and the friction force between the constant pressure locking device (3) and the two ends of the rotating shaft component (4) realizes the locking of the rotating shaft component (4) along the axial rotation.
The constant-pressure locking device (3) comprises a locking seat (31), a disc spring (32), an adjusting screw (33), a pressure plate (34), a guide cap (35), a flexible support (36) and a pressure plate (37);
the section of the locking seat (31) is L-shaped, the long side of the L-shaped is provided with a cylindrical blind hole 1, the bottom of the blind hole 1 is provided with a through hole 2, and the short side of the L-shaped is provided with a mounting hole which can be connected with a second connecting piece (2);
the flexible support (36) is petal-shaped; each petal is arc-shaped, and the middle of the flexible support (36) is of a hollow structure; the pressing plate (37) is circular, and the pressing plate (37) can cover the hollow part in the middle of the flexible support (36);
the guide cap (35) is a hollow cylinder, one end face of the hollow cylinder is provided with a boss which extends out along the radial direction, the boss is annular, and the other end face of the hollow cylinder is provided with a through hole which can pass through the rope (52); the other end face of the guide cap (35) can be extended and retracted from the through hole 2 (b);
the disc spring (32) is arranged between the pressure plate (34) and the annular boss of the guide cap (35);
the adjusting screw (33) is arranged on the locking seat (31), the adjusting pressure plate (34) can be pressed through the adjusting screw (33), and the distance between the adjusting pressure plate (34) and the guide cap (35) is adjusted; the guide cap (35) controls the contraction direction of the disc spring (32); when the disc spring (32) is compressed, the flexible support (36) generates flexible deformation, and the compression plate (37) is compressed on two ends (the friction disc 45) of the rotating shaft assembly (4);
the flexible support (36) is positioned at the opening of the cylindrical blind hole 1, and the flexible support (36) is connected with the compression plate (37) through a screw; the flexible support (36) is connected with the pressing plate (37) through a screw;
the preferable scheme is as follows: the flexible supports (36) are symmetrically arranged along the axial direction and are fixedly connected with the pressing plate (37) and the locking seat (31) through screws; the disc spring (32) uniformly pushes the flexible support (36) through the guide cap (35) to enable the flexible support (36) to deform, the compression plate (37) is compressed on the friction disc (45), and the distance between the compression plate (34) and the flange of the guide cap (35) is changed through the adjusting screw (33), so that further constant-pressure locking is achieved.
The constant-pressure locking devices (3) are arranged at two ends of the rotating shaft (42), are symmetrical about a plane formed by the axes of the corresponding rod pieces of the first connecting piece (1) and the second connecting piece (2) and the axis of the rotating shaft (42), and are symmetrical about a plane formed by the axes of the corresponding rod pieces of the first connecting piece (1) and the second connecting piece (2) and the axis of the rotating shaft (42) and perpendicular to the axis of the rotating shaft.
The rotating shaft assembly (4) comprises a support (41), a rotating shaft (42), a bearing (43), a baffle (44) and a friction disc (45);
the rotating shaft (42) is arranged on the support (41), the bearing (43) is sleeved on the rotating shaft (42) and is positioned between the support (41) and the rotating shaft (42), so that the rotating shaft (42) can rotate around the support (41), and the baffle (44) is arranged on the rotating shaft (42) and pressed at two ends of the bearing; the friction plates (45) are fixed at two ends of the rotating shaft (42) through screws and are positioned outside the baffle plates (44).
The baffle (44), the support (41) and the bearing (43) jointly realize the positioning of the rotating shaft (42); the high-precision rotation of the rotating shaft (42) is realized through the bearing (43); the surface of the friction disc (45) is provided with a high-friction coating, under the positive pressure provided by the constant-pressure locking device (3), the friction disc (45) and the pressing plate (37) can jointly realize the reliable restriction on the rotation of the rotating shaft (42), and the restriction torque can be adjusted.
The low impact release device (5) comprises a rope cutter (51), a rope (52), a fixed pulley system (53), a fixed flange (54), a tensioning cap (55) and a threaded cap (55-1);
the tensioning cap (55) is arranged in the guide cap (35) through a screw; the tensioning cap (55) is a hollow cylinder, one end of the hollow cylinder is provided with a boss which extends out along the radial direction and is used as a fixed flange (54) to be connected with the other end face of the guide cap (35), and the outer side of the hollow cylinder is provided with threads which are matched with the threaded cap (55-1); one end of the rope (52) is fixed on a screw cap (55-1) in a low impact release device (5) at one end of the rotating shaft component (4), and the position of one end of the rope (52) can be adjusted by rotating the screw cap (55-1);
the rope cutter (51) is arranged on the locking seat (31) and is positioned on the long side of the L-shaped structure and close to the short side;
the fixed pulley system (53) is arranged on the locking seats (31), two locking seats (31) are arranged, one locking seat is positioned at one end of the long edge of the L-shaped structure and is positioned beside the tensioning cap (55), and the other locking seat is positioned at the other end of the long edge of the L-shaped structure; the other end of the rope (52) is fixed on a screw cap (55-1) in a low impact release device (5) at the other end of the rotating shaft component (4) through a fixed pulley system (53);
the rope (52) is tensioned through a tensioning cap (55), and is connected with the guide cap (35) through a fixing flange (54), and the length of the rope (52) is determined according to the stroke of the guide cap (35); the single rope (52) is connected with the tensioning caps (55) of the two constant-pressure locking devices (3) at the same time, two or more cutters are fixed on the locking seat (31), the rope (52) is cut off through ablation, and as long as one cutter works normally, disc springs (32) at two ends can be released at the same time, so that joint locking is realized.
The pressure plate (34) is annular and is positioned at the bottom of the cylindrical blind hole (1) of the locking seat (31).
Decide pulley system (53) and install on locking seat (31), install two on every locking seat (31), one is located the one end on the long limit of L shape structure, and this one end is the free end, and is located by tensioning cap (55), and another is located the other end on the long limit of L shape structure, and this other end is the one end that is close to the minor face.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, the constant-pressure pre-tightening device locks the rotating shaft, so that the joint structure is symmetrical to two planes passing through the axis of the connected rod piece, the structural symmetry is further improved, the defect of poor structural symmetry of the traditional locking joint is overcome, and the thermal stability of the joint is improved.
(2) The invention realizes the locking of the freedom degree of axial movement through the positive pressure of the constant pressure locking device, realizes the locking of the freedom degree of axial rotation through the friction force between the constant pressure locking device and two ends of the rotating shaft assembly, has no clearance in the locking mode, can adapt to the thermal deformation of the rotating shaft in a thermal environment, effectively ensures the pressing force after locking, improves the locking rigidity of the joint, and can meet the requirements of different mechanisms on the rigidity through the selection of the rigidity of the disc spring.
(3) The invention realizes the release of the two constant-pressure locking devices through a single rope, has compact integral structure, adopts a plurality of low-impact release devices to cut the rope, has high cutting reliability and small joint locking impact, and is suitable for a precise space unfolding mechanism with higher requirements on thermal stability and rigidity after unfolding.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a structural view of the constant pressure locking device 3;
fig. 3 is a structural view of the spindle assembly 4;
fig. 4 is a block diagram of the low impact release device 5.
Detailed Description
The invention discloses a locking joint with high thermal stability, which comprises a first connecting piece 1, a second connecting piece 2, a constant pressure locking device 3, a rotating shaft assembly 4 and a low impact release device 5, wherein the first connecting piece is fixedly connected with the rotating shaft assembly; the first connecting piece 1 and the second connecting piece 2 are respectively fixedly connected with a rod piece, the first connecting piece 1 and the second connecting piece 2 form a rotating pair through a rotating shaft 42 and a bearing 43, the first connecting piece 1 and the second connecting piece 2 are hinged, two ends of the rotating shaft 42 are provided with constant-pressure locking devices 3 with constant pressing force, and the constant-pressure locking devices 3 can be locked through a low-impact releasing device 5. According to the invention, through reasonable layout of the constant pressure locking device 3, the rotating shaft assembly 4 and the low impact release device 5, two planes of the whole joint relative to the axis of the rod piece are symmetrical, and the problem of poor symmetry of the traditional locking joint is solved; the deformation of the flexible support 36 realizes the gapless locking along the axial direction, eliminates the locking gap of the traditional locking joint and improves the locking rigidity; through setting up level pressure preloading device and low impact release 5, guaranteed that pivot 42 both ends pretightning force equals, solved the poor problem of traditional locking joint thermal stability.
The high-thermal-stability locking joint is applicable to a precise space unfolding mechanism for space science loads of large space telescopes and the like, can provide a stable rotating shaft for the mechanism in the unfolding process, is locked after the mechanism is unfolded in place, and keeps enough locking precision under the environment of bearing space heat and force. The invention improves the thermal stability of the joint through better structural symmetry than the traditional locking joint, and can better keep the structural precision in the space thermal environment with violent temperature change; through the gapless locking to joint pivot direction, further improve rigidity, reduce and keep the rocking of structure under the space mechanics load to realize the angular second level locking precision that traditional locking joint can't reach.
In fig. 1 to 4: 1 is a first connecting piece; 2 is a second connecting piece; 3 is a constant pressure locking device; 31 is a locking seat; 32 is a disc spring; 33 is an adjusting screw; 34 is a pressure plate; 35 is a guide cap; 36 is a flexible support; 37 is a pressing plate; 4 is a rotating shaft component; 41 is a support; 42 is a rotating shaft; 43 is a bearing; 44 is a baffle plate; 45 is a friction disk; 5 is a low impact release device; 51 is a rope cutter; 52 is a rope; 53 using a fixed pulley as a series; 54 is a fixed flange; 55 is a tension cap.
As shown in fig. 1, a high thermal stability locking joint comprises: the device comprises a first connecting piece 1, a second connecting piece 2, a constant pressure locking device 3, a rotating shaft assembly 4 and a low impact release device 5.
The first connecting piece 1 and the second connecting piece 2 can be fixedly connected with an external rod piece respectively, the first connecting piece 1 and the second connecting piece 2 are rotatably connected through the rotating shaft assembly 4, and the rotating shaft assembly 4 can enable the first connecting piece 1 and the second connecting piece 2 to relatively rotate through the rotating shaft assembly 4 so as to realize the hinging of the first connecting piece 1 and the second connecting piece 2; the two ends of the rotating shaft component 4 are provided with constant pressure locking devices 3, and the constant pressure locking devices 3 are released to be pressed to the two ends of the rotating shaft component 4 through the low impact release device 5, so that the constant pressure locking devices 3 provide constant pressing force for the two ends of the rotating shaft component 4; the positive pressure provided by the constant pressure locking device 3 realizes the axial movement locking of the rotating shaft component 4; and the friction force between the constant pressure locking device 3 and the two ends of the rotating shaft assembly 4 realizes the locking of the rotating shaft assembly 4 along the axial direction.
As shown in fig. 2, in order to realize the constant-pressure and gapless locking of the rotating shaft assembly 4, the constant-pressure locking device 3 comprises a locking seat 31, a disc spring 32, an adjusting screw 33, a pressure plate 34, a guide cap 35, a flexible support 36 and a pressure plate 37;
wherein, preferably, the flexible support 36 is petal-shaped; each petal is arc-shaped, and the middle of the flexible support 36 is of a hollow structure; the pressing plate 37 is circular, and the pressing plate 37 can cover the hollow part in the middle of the flexible support 36; because the rigidity of the flexible support 36 is weaker, and the rigidity of the compression plate 37 is stronger, when the flexible support 36 is pushed by the guide cap 35, the compression plate 37 which is hardly deformed can be compressed at two ends of the rotating shaft component 4, so that gapless locking is realized; meanwhile, as the rigidity of the disc spring 32 is adjustable, the pressing force can be determined according to actual requirements, so that constant-pressure pre-tightening is realized.
The preferable scheme is as follows: the flexible supports 36 are symmetrically arranged along the axial direction and fixedly connected with the pressing plate 37 and the locking seat 31 through screws; the disc spring 32 uniformly pushes the flexible supports 36 through the guide cap 35, so that the flexible supports 36 deform, the pressing plate 37 is pressed on the friction disc 45, and the distance between the pressing plate 34 and the flange of the guide cap 35 is changed through the adjusting screw 33, so that further constant-pressure locking is realized.
Different combinations of disc spring 32 material, adjusting screw 33 length, and flexible support 36 material can produce different compressive forces with other parameters being constant. Preferably, the material of the disc spring 32 is spring steel, the flexible supporting material is beryllium copper, the length of the screw is 10mm, and the pressing force of the pressing plate 37 to the outside is 2000N. According to actual needs, the material of the disc spring 32 with higher rigidity, the material of the adjusting screw 33 with longer length and the material of the flexible support 36 with lower rigidity can be selected to realize higher pressing force.
As shown in fig. 3, the rotating shaft assembly 4 includes a support 41, a rotating shaft 42, a bearing 43, a baffle 44, and a friction disk 45;
preferably, the friction disk 45 has a high friction coating on the surface, and under the positive pressure provided by the constant pressure locking device 3, the friction disk 45 and the pressing plate 37 can realize reliable restriction on the rotation of the rotating shaft 42, and the restriction torque can be adjusted. The surface high friction coating of the friction disc 45, the radius and the friction coefficient of the pressing plate 37 and the pressing force of the pressing plate 37 to the outside determine the maximum value of the external moment of the joint resisting the rotation along the axial direction. Preferably, the radius is 2cm, the coefficient of friction is 2, the external compression force is 2000N, and the maximum moment of the joint against axial rotation is about 50 Nm.
As shown in fig. 1, in order to achieve better symmetry of the locking joint, the constant pressure locking devices 3 are arranged at two ends of the rotating shaft 42, are symmetrical about a plane formed by the axes of the corresponding rod pieces of the first connecting piece 1 and the second connecting piece 2 and the axis of the rotating shaft 42, and are symmetrical about a plane formed by the axes of the corresponding rod pieces of the first connecting piece 1 and the second connecting piece 2 and the axis of the rotating shaft 42.
As shown in fig. 4, the low impact relief device 5 includes a rope cutter 51, a rope 52, a fixed pulley system 53, a fixing flange 54, a tension cap 55, a screw cap 55-1; the rope 52 is tensioned by a tensioning cap 55, is connected with the guide cap 35 by a fixed flange 54, and is determined in length according to the stroke of the guide cap 35; the single rope 52 is simultaneously connected with the tensioning caps 55 of the two constant pressure locking devices 3, two or more cutters are fixed on the locking seat 31, the rope 52 is cut off through ablation, and as long as one cutter works normally, the disc springs 32 at two ends can be simultaneously released, joint locking is realized, and the reliability of joint locking is improved. Preferably, the cutter can cut off the rope by adopting a laser burning mode, and the locking reliability can reach 99.9999% by adopting two cutters.
According to the locking joint with high thermal stability, under the comprehensive action of +/-100 ℃ temperature alternation and vibration force, the change value of the included angle between the axes of the first connecting piece 1 and the second connecting piece 2 is measured to be less than 1 'and is far lower than the change value of the included angle of the traditional locking joint which is more than 30', so that the thermal stability of the locking joint is remarkably improved.
The preferred locking control modes of the present invention are: when the first connecting piece 1 and the second connecting piece 2 rotate to the set position, the low impact releasing device 5 cuts the rope 52, and after the rope 52 is cut off, the disc spring 32 is released to push the pressing plate 37 to press the friction discs 45 at the two ends of the rotating shaft component 4, so that the rotating freedom degree of the rotating shaft component 4 is restrained, and the joint locking is realized.
The invention realizes that the joint structure is symmetrical to two planes passing through the axis of the connected rod piece by locking the rotating shaft by the constant pressure pre-tightening device, further improves the structural symmetry, overcomes the defect of poor structural symmetry of the traditional locking joint, and improves the thermal stability of the joint.
The invention realizes the release of the two constant-pressure locking devices through a single rope, has compact integral structure, adopts a plurality of low-impact release devices to cut the rope, has high cutting reliability and small joint locking impact, and is suitable for a precise space unfolding mechanism with higher requirements on thermal stability and rigidity after unfolding.
Those skilled in the art will appreciate that the details not described in the present specification are well known.
Claims (10)
1. A high thermal stability locking joint characterized by: the method comprises the following steps: the device comprises a first connecting piece (1), a second connecting piece (2), a constant pressure locking device (3), a rotating shaft assembly (4) and a low impact release device (5);
the first connecting piece (1) and the second connecting piece (2) can be fixedly connected with an external rod piece respectively, the first connecting piece (1) and the second connecting piece (2) are rotatably connected through the rotating shaft assembly (4), the rotating shaft assembly (4) is connected with the first connecting piece (1) and the second connecting piece (2), and the first connecting piece (1) and the second connecting piece (2) can rotate relatively through the rotating shaft assembly (4) to realize that the first connecting piece (1) is hinged with the second connecting piece (2); the two ends of the rotating shaft assembly (4) are provided with constant-pressure locking devices (3), the constant-pressure locking devices (3) are released through the low-impact release devices (5), so that the constant-pressure locking devices (3) are pressed to the two ends of the rotating shaft assembly (4), and the constant-pressure locking devices (3) provide constant pressing force for the two ends of the rotating shaft assembly (4); positive pressure provided by the constant pressure locking device (3) realizes axial movement locking of the rotating shaft assembly (4); and the friction force between the constant pressure locking device (3) and the two ends of the rotating shaft component (4) realizes the locking of the rotating shaft component (4) along the axial rotation.
2. A high thermal stability locking joint as defined in claim 1 wherein: the constant-pressure locking device (3) comprises a locking seat (31), a disc spring (32), an adjusting screw (33), a pressure plate (34), a guide cap (35), a flexible support (36) and a pressure plate (37);
the section of the locking seat (31) is L-shaped, the long side of the L-shaped is provided with a cylindrical blind hole 1, the bottom of the blind hole 1 is provided with a through hole 2, and the short side of the L-shaped is provided with a mounting hole which can be connected with a second connecting piece (2);
the flexible support (36) is petal-shaped; each petal is arc-shaped, and the middle of the flexible support (36) is of a hollow structure; the pressing plate (37) is circular, and the pressing plate (37) can cover the hollow part in the middle of the flexible support (36);
the guide cap (35) is a hollow cylinder, one end face of the guide cap (35) is provided with a boss which extends out along the radial direction, the boss is annular, and the other end face of the hollow cylinder is provided with a through hole which can pass through the rope (52); the other end face of the guide cap (35) can be extended and retracted from the through hole 2;
the disc spring (32) is arranged between the pressure plate (34) and the annular boss of the guide cap (35);
the adjusting screw (33) is arranged on the locking seat (31), the adjusting pressure plate (34) can be pressed through the adjusting screw (33), and the distance between the adjusting pressure plate (34) and the guide cap (35) is adjusted; the guide cap (35) controls the contraction direction of the disc spring (32); when the disc spring (32) is compressed, the flexible support (36) generates flexible deformation, and the compression plates (37) are compressed at two ends of the rotating shaft assembly (4);
the flexible support (36) is connected with the pressing plate (37) through screws.
3. A high thermal stability locking joint as defined in claim 2 wherein: the flexible support (36) is positioned at the opening of the cylindrical blind hole 1.
4. A high thermal stability locking joint as defined in claim 2 wherein: the constant-pressure locking devices (3) are arranged at two ends of the rotating shaft (42), are symmetrical about a plane formed by the axes of the corresponding rod pieces of the first connecting piece (1) and the second connecting piece (2) and the axis of the rotating shaft (42), and are symmetrical about a plane formed by the axes of the corresponding rod pieces of the first connecting piece (1) and the second connecting piece (2) and the axis of the rotating shaft (42).
5. A high thermal stability locking joint as defined in claim 2 wherein: the rotating shaft assembly (4) comprises a support (41), a rotating shaft (42), a bearing (43), a baffle (44) and a friction disc (45);
the rotating shaft (42) is arranged on the support (41), the bearing (43) is sleeved on the rotating shaft (42) and is positioned between the support (41) and the rotating shaft (42), so that the rotating shaft (42) can rotate around the support (41), and the baffle (44) is arranged on the rotating shaft (42) and pressed at two ends of the bearing; the friction plates (45) are fixed at two ends of the rotating shaft (42) through screws and are positioned outside the baffle plates (44).
6. A high thermal stability locking joint as defined in claim 5 wherein:
the baffle (44), the support (41) and the bearing (43) jointly realize the positioning of the rotating shaft (42); the high-precision rotation of the rotating shaft (42) is realized through the bearing (43); the surface of the friction disc (45) is provided with a high-friction coating, under the positive pressure provided by the constant-pressure locking device (3), the friction disc (45) and the pressing plate (37) can jointly realize the reliable restriction on the rotation of the rotating shaft (42), and the restriction torque can be adjusted.
7. A high thermal stability locking joint as defined in claim 2 wherein: the low impact release device (5) comprises a rope cutter (51), a rope (52), a fixed pulley system (53), a fixed flange (54), a tensioning cap (55) and a threaded cap (55-1);
the tensioning cap (55) is arranged in the guide cap (35) through a screw; the tensioning cap (55) is a hollow cylinder, one end of the hollow cylinder is provided with a boss which extends out along the radial direction and is used as a fixed flange (54) to be connected with the other end face of the guide cap (35), and the outer side of the hollow cylinder is provided with threads which are matched with the threaded cap (55-1); one end of the rope (52) is fixed on a screw cap (55-1) in a low impact release device (5) at one end of the rotating shaft component (4), and the position of one end of the rope (52) can be adjusted by rotating the screw cap (55-1);
the rope cutter (51) is arranged on the locking seat (31) and is positioned on the long side of the L-shaped structure and close to the short side;
the fixed pulley system (53) is arranged on the locking seats (31), two locking seats (31) are arranged, one locking seat is positioned at one end of the long edge of the L-shaped structure and is positioned beside the tensioning cap (55), and the other locking seat is positioned at the other end of the long edge of the L-shaped structure; the other end of the rope (52) is fixed on a screw cap (55-1) in a low impact release device (5) at the other end of the rotating shaft component (4) through a fixed pulley system (53).
8. A high thermal stability locking joint as defined in claim 2 wherein: the rope (52) is tensioned through a tensioning cap (55), and is connected with the guide cap (35) through a fixing flange (54), and the length of the rope (52) is determined according to the stroke of the guide cap (35); the single rope (52) is connected with the tensioning caps (55) of the two constant-pressure locking devices (3) at the same time, two or more cutters are fixed on the locking seat (31), the rope (52) is cut off through ablation, and as long as one cutter works normally, disc springs (32) at two ends can be released at the same time, so that joint locking is realized.
9. A high thermal stability locking joint as defined in claim 2 wherein: the pressure plate (34) is annular and is positioned at the bottom of the cylindrical blind hole (1) of the locking seat (31).
10. A high thermal stability locking joint as defined in claim 7 wherein: decide pulley system (53) and install on locking seat (31), install two on every locking seat (31), one is located the one end on the long limit of L shape structure, and this one end is the free end, and is located by tensioning cap (55), and another is located the other end on the long limit of L shape structure, and this other end is the one end that is close to the minor face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910316220.8A CN110131298B (en) | 2019-04-19 | 2019-04-19 | Locking joint with high thermal stability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910316220.8A CN110131298B (en) | 2019-04-19 | 2019-04-19 | Locking joint with high thermal stability |
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| CN110131298A CN110131298A (en) | 2019-08-16 |
| CN110131298B true CN110131298B (en) | 2020-09-18 |
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| CN201910316220.8A Active CN110131298B (en) | 2019-04-19 | 2019-04-19 | Locking joint with high thermal stability |
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|---|---|---|---|---|
| CN109625328A (en) * | 2018-12-12 | 2019-04-16 | 上海卫星装备研究所 | Fuse Type compresses release device |
| CN113386161B (en) * | 2021-07-05 | 2022-08-30 | 四川中科彭成机器人技术有限公司 | Creep-resistant rope-driven mechanical finger |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CH705620A2 (en) * | 2011-10-13 | 2013-04-15 | Halime Philipp | Pivot with freewheel, has forks whose free ends are displaced by axial displacement of clamping shaft, such that rotation of rotary joint is blocked in one direction through activation of directional freewheel lock |
| CN102777487A (en) * | 2012-08-08 | 2012-11-14 | 摩尔菲（深圳）科技开发有限公司 | Rotating shaft with damping system |
| CN105711861B (en) * | 2016-03-29 | 2017-12-15 | 上海卫星工程研究所 | Spacecraft single-point Compliant pressure release device |
| CN106499933B (en) * | 2016-10-24 | 2018-05-29 | 田雨川 | More anti-loosening rack joint devices of friction plate |
| CN206682147U (en) * | 2017-03-24 | 2017-11-28 | 武汉虹信通信技术有限责任公司 | A kind of Damping rotation shaft mechanism |
| CN107524698B (en) * | 2017-07-10 | 2019-01-25 | 北京空间飞行器总体设计部 | A kind of high rigidity locking hinge that level pressure pre-tightens |
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