CN108535035A - A kind of zero-g hanging test device for cylinder unwrapping mechanism - Google Patents

Abstract

The invention discloses a zero-gravity suspension test device for a cylinder unfolding mechanism, which comprises a support assembly, a suspension guide rail assembly, and a guide rail auxiliary moving assembly. The support assembly is used to fix the support cylinder expansion mechanism; the suspension guide rail assembly includes a fixed guide rail and a translational guide rail, and there is a slider on the guide rail that can move along the guide rail; one end of the suspension rope is connected with the deployment mechanism, and the other end passes through the pulley It is connected with the counterweight, and the influence of the self-gravity of the unfolding mechanism on the unfolding process is eliminated through the function of the counterweight; the guide rail auxiliary moving component includes a motor and a screw slide table, driven by the motor, the screw slide table moves, and then drives the suspension guide rail assembly The guide rail that can be translated in the center moves, and the guide rail that can be translated can be kept directly above the hanging ring of the suspension rope of the unfolding mechanism during the unfolding process. The invention can effectively carry out gravity unloading during the unfolding process of the cylinder unfolding mechanism, has a simple structure, and can be used for the ground zero-gravity unfolding test of the cylinder unfolding mechanism.

Description

A Zero Gravity Suspension Test Device for Cylindrical Deployment Mechanism

technical field

The invention belongs to the technical field of machinery, and relates to a zero-gravity suspension test device for a cylinder unfolding mechanism, which can be used for the ground zero-gravity deployment test of the cylinder unfolding mechanism.

Background technique

With the development of the aerospace industry, the structure of the spacecraft tends to be larger, but due to the limitation of the geometric space of the launch vehicle, the deployment mechanism emerges as the times require; the cylindrical deployment mechanism has received extensive attention and attention due to its better signal aggregation ability application. Before the cylindrical deployment mechanism is put into use, a deployment test needs to be carried out on the ground; and since the mechanism is in a state of weightlessness during orbital operation, the ground deployment test must also simulate the zero-gravity state of the orbital environment. The ground deployment test device needs to be designed according to the structural characteristics of the deployment mechanism and the deployment trajectory. The existing zero-gravity test devices on the ground are mainly for the deployment mechanism whose deployment trajectory is a straight line, and a few of the test devices are for two-dimensional plane deployment. The moving suspension guide rail will also add additional resistance to the mechanism deployment and reduce the gravity unloading effect.

Contents of the invention

The purpose of the present invention is to solve the above problems, and propose a zero-gravity suspension test device for a cylindrical deployment mechanism, which can be used for the cylindrical deployment mechanism to simulate the zero-gravity state on the track under the ground gravity environment, and is used for the deployment test. .

A zero-gravity suspension test device for a cylinder unfolding mechanism, comprising a support assembly, a suspension guide rail assembly, and a guide rail auxiliary moving assembly.

The support assembly includes a frame, a support guide rail, a fixed support seat, and a mobile support seat. The frame is connected by profiles, and the whole is in the shape of a cuboid; the support guide rail is fixedly installed on a beam on the side of the frame, the fixed support base is fixedly installed on the support guide rail, and the fixed support base and the beam used to install and fix the long guide rail above the frame are located at the same In the vertical plane; the mobile support seat is installed on the support guide rail and can move along the guide rail; the structure of the fixed support seat and the mobile support seat are exactly the same, bearing seats are installed on both sides of the support seat, and the rotating shafts at the outermost joint connection of the cylindrical surface expansion mechanism are respectively It is connected with the bearing seat on the fixed support seat and the mobile support seat; the mobile support seat can move back and forth along the guide rail to realize the unfolding and folding of the cylindrical surface deployment mechanism; under the connection constraints of the fixed support seat, the mobile support seat and the deployment mechanism, the The joints of the deployment mechanism with the fixed support seats on the same row are always located in the same vertical plane during the deployment process; similarly, the joints of the deployment mechanism with the mobile support seats on the same row are also always located in the same vertical plane during the deployment process.

The suspension guide rail assembly includes a fixed long guide rail, a fixed short guide rail, a connecting slide block, a moving long guide rail, a slide block, a pulley, a suspension rope, and a counterweight. The fixed long guide rail is fixedly installed on the longitudinal beam above the frame; there are two fixed short guide rails, which are respectively fixedly installed on the transverse beam above the frame; the two fixed short guide rails are respectively installed with a connecting slider that can move along the guide rail. The moving long guide rail is connected with the two connecting sliders and can move along the direction of the short guide rail; the fixed long guide rail and the moving long guide rail are respectively equipped with seven sliders that can move along the guide rails, and each slider is equipped with a pulley; One end of the suspension rope is connected with the suspension ring on the cylinder unfolding mechanism; the suspension ring is connected with the right connecting rod and the left connecting rod through a rotating pair, and the right connecting rod and the left connecting rod are respectively connected with the corresponding right joint and left joint through a rotating pair. The length of the right link and the left link are equal, and the distance between the joint connection and the joint rotation axis is equal, so that the suspension ring can always be located on the angle bisector of the two joints; the other end of the suspension rope is connected to the counterweight around the pulley, The heavy mass is equal to the weight of the corresponding suspension rope hanging cylinder expansion mechanism part.

The guide rail auxiliary moving assembly includes a base, a lead screw, a slide table, a motor, and a connecting block. The two ends of the base are respectively fixed on the top of the frame; the two ends of the lead screw are installed on the base through bearings, and connected with the motor through a coupling; The guide rails are connected, and the drive of the motor drives the sliding table to move, and then can drive the moving long guide rail to move.

The zero-gravity suspension test device is not only suitable for a cylinder unfolding mechanism composed of two columns, but also for a cylinder expanding mechanism with n columns after lateral expansion. There is a long guide rail directly above the suspension ring of the expansion mechanism in each row, and the guide rail corresponding to the first row is a fixed long guide rail, which is fixedly connected with the frame; the mobile long guide rails corresponding to the second row to the nth row are connected to the lead screw through a slide table; The lead screws in each component are connected to the motor through a gear train, and the speed ratio of each gear is 1, so that the rotation of the motor can be transmitted to each lead screw; The ratio is (i-1), that is, the moving speed of the moving long guide rail corresponding to the i-th column is (i-1) times the moving speed of the moving long guide rail corresponding to the second column; thus, it can be driven by a motor, So that each moving long guide rail is always located directly above the corresponding suspension ring during the unfolding process of the unfolding mechanism.

The advantages of the present invention are:

(1) The present invention develops a set of ground zero-gravity suspension test device for a cylindrical surface deployment mechanism, which can be used to simulate the zero-gravity state on the track for deployment tests, and can be applied to the cylindrical surface deployment mechanism after lateral expansion, Simple structure;

(2) The movable suspension guide rail of the present invention can ensure that the counterweight for unloading gravity is always located directly above the suspension ring of the deployment mechanism;

(3) The guide rail auxiliary moving assembly of the present invention can be used to drive the movable guide rail to move, avoiding adding extra deployment resistance to the deployment mechanism.

Description of drawings

Fig. 1 is an overall schematic diagram of a zero-gravity suspension test device for a cylindrical unfolding mechanism of the present invention;

Fig. 2 is a schematic diagram of the support assembly of the present invention;

Fig. 3 is a partially enlarged schematic view of the support assembly of the present invention;

Fig. 4 is a schematic diagram of the cylinder unfolding mechanism of the present invention;

Fig. 5 is a schematic diagram of the suspension assembly of the present invention;

Fig. 6 is a schematic diagram of the suspension ring of the present invention;

Fig. 7 is a schematic diagram of the guide rail auxiliary moving assembly of the present invention;

Fig. 8 is a schematic diagram of the suspension test device applicable to the n-column deployment mechanism of the present invention;

In the picture:

1-Support component 2-Suspension component 3-Rail auxiliary moving component

101-frame 102-support rail 103-fixed support seat

104-mobile support seat 105-bearing seat 106-rotating shaft

201-Fix the long guide rail 202-Fix the short guide rail 203-Connect the slider

204-moving long guide rail 205-slider 206-pulley

207-suspension rope 208-suspension ring 209-right link

210-left link 211-right joint 212-left joint

213-counterweight 301-base 302-lead screw

303-slide 304-motor 305-connection block

Detailed ways

The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

Application No. 2017107554079 discloses a synchronously deployable cylindrical antenna based on a Bennett mechanism, in which a cylindrical deployable mechanism is disclosed, and the zero-gravity suspension test device of the present invention can be applied to this deployable mechanism. As shown in Figure 4, during the deployment process of the deployment mechanism, the four points A, B, C, and D are always coplanar; the projections of the joints M ₁ , M ₂ , M ₃ , M ₄ , M ₅ , and M ₆ on the plane ABCD is always on the straight line AB; the projection of the trajectories of the joints N ₁ , N ₂ , N ₃ , N ₄ , N ₅ , and N ₆ on the plane ABCD can be decomposed into two parts, one part is always moving along the straight line CD, and the other part is is the movement along the AC direction. The suspension position and mode of the unfolding mechanism can be determined according to the movement trajectories of the above joints. One guide rail is fixed directly above the joints M ₁ , M ₂ , M ₃ , M ₄ , M ₅ , and M ₆ , and the other guide rail is located directly above the joints N ₁ , It is directly above N ₂ , N ₃ , N ₄ , N ₅ , and N ₆ , and can translate along with the joints.

The present invention is a zero-gravity suspension test device for a cylinder unfolding mechanism, including a support assembly 1, a suspension guide rail assembly 2, and a guide rail auxiliary moving assembly 3, as shown in FIG. 1 .

The support assembly 1 includes a frame 101 , a support rail 102 , a fixed support base 103 , and a movable support base 104 , as shown in FIG. 2 . The frame 101 is connected by profiles and is in the shape of a cuboid as a whole; the support guide rail 102 is fixedly installed on a beam on the side of the frame 101, and the fixed support seat 103 is fixedly installed on the support guide rail and cannot be moved. The beam on which the fixed long guide rail 201 is installed is located in the same vertical plane; the mobile support base 104 is installed on the support guide rail and can move along the guide rail; the fixed support base 103 and the mobile support base 104 have exactly the same structure, and bearing seats are installed on both sides of the support base 105, the rotating shaft 106 at the outermost joint joint of the cylinder unfolding mechanism is connected to the bearing seat 105 on the fixed support seat 103 and the mobile support seat 104 respectively, as shown in Figure 3; the mobile support seat 104 can move back and forth along the guide rail to realize the column The unfolding and retracting of the surface unfolding mechanism. Under the constraints of the connection between the fixed support base 103, the mobile support base 104 and the deployment mechanism, the joints A, M ₁ , M ₂ , M ₃ , M ₄ , M ₅ , M ₆ of the deployment mechanism located on the same row as the fixed support base 103 , B are always located in the same vertical plane during the unfolding process; similarly, joints C, N ₁ , N ₂ , N ₃ , N ₄ , N ₅ , N ₆ , D It is also always in the same vertical plane during unfolding.

The suspension guide rail assembly 2 includes a fixed long guide rail 201, a fixed short guide rail 202, a connecting slider 203, a moving long guide rail 204, a slider 205, a pulley 206, a suspension rope 207 and a counterweight 213, as shown in FIG. 5 . The fixed long guide rail 201 is fixedly installed on the longitudinal beam above the frame 101, and is located in the same plane as the fixed support seat 103; there are two fixed short guide rails 202, which are respectively fixedly installed on the transverse beam above the frame 101; A connection slider 203 movable along the guide rails is respectively installed on the guide rails 202, and the moving long guide rail 204 is connected with the two connection sliders 203, and can move along the direction of the short guide rails 202; Seven slide blocks 205 movable along the guide rails are installed respectively, and a pulley 206 is installed on each slide block 205; one end of the suspension rope 207 links to each other with the suspension ring 208 on the cylinder unfolding mechanism; as shown in Figure 6, the suspension ring 208 Connect with the right connecting rod 209 and the left connecting rod 210 through a rotating pair, the right connecting rod 209 and the left connecting rod 210 are respectively connected with the corresponding right joint 211 and left joint 212 through a rotating pair, the length of the right connecting rod 209 and the left connecting rod 210 Equal, it is equated with the distance of the joint rotating shaft from the joint joint, so it can be ensured that the suspension ring 208 is always on the angle bisector of the two joints; Corresponding suspension rope 207 suspends the weight of cylindrical surface unfolding mechanism part equal. During the unfolding process of the unfolding mechanism, each joint will move up and down, and the counterweight connected to it will also move up and down, and the moving distance of the two is the same, that is, the gravitational potential energy of the two remains unchanged, which can eliminate the gravitational impact. The effect of the unfolding process.

The guide rail auxiliary moving assembly 3 includes a base 301 , a lead screw 302 , a slide table 303 , a motor 304 , and a connecting block 305 , as shown in FIG. 7 . The two ends of the base 301 are fixedly installed on the top of the frame 101 respectively; the two ends of the screw 302 are installed on the base 301 through bearings, and are connected with the motor 304 through a coupling; The leading screw 302 rotates and drives the slide table 303 to move along the lead screw 302 direction; one end of the connecting block 305 is connected with the slide table 303, and the other end is connected with the moving long guide rail 204, and the moving slide table 303 can drive the moving long guide rail 204 to move. The moving speed of the long moving guide rail 204 can be controlled by the motor 304 , so that the long moving guide rail 204 is always located directly above the joints N ₁ , N ₂ , N ₃ , N ₄ , N ₅ , and N ₆ during deployment. The energy required for moving the long guide rail 204 comes from the motor 304 of the guide rail auxiliary moving assembly 3, which will not cause additional motion resistance to the unfolding mechanism.

The zero-gravity suspension test device is not only used for the cylinder expansion mechanism composed of two rows, but also can be used for the cylinder expansion mechanism with multiple columns after lateral expansion, as shown in Figure 8. Schematic diagram of the top view of the mechanism and the corresponding schematic diagram of the auxiliary moving components of the upper guide rail. Each row of expansion mechanism suspension rings corresponds to a long guide rail directly above, and the guide rail corresponding to the first row is a fixed long guide rail 201, which is fixedly connected with the frame 101; The lead screws in each assembly are connected to the motor 304 through a gear train, and the speed ratio of each gear is 1, so that the rotation of the motor can be transmitted to each lead screw; the lead screw pitch corresponding to the i column is the same as the screw pitch corresponding to the second column The ratio of the pitch of the bar is (i-1), that is, the moving speed of the moving long guide rail corresponding to the i-th column is (i-1) times the moving speed of the moving long guide rail corresponding to the second column; thus, it can be realized by a motor The drive makes each moving long guide rail always be located directly above the corresponding suspension ring during the unfolding process of the unfolding mechanism.

Claims (5)

1. a kind of zero-g hanging test device for cylinder unwrapping mechanism, which is characterized in that led including support component, suspension Rail assembly, guide rail assist moving assembly；

Support component includes fixed guide rail and can put down for fixed support cylinder unfolding mechanism, hanging rail component The guide rail of shifting, guide rail is equipped with can be along the sliding block that guide rail moves；Suspension strop one end is connected with unfolding mechanism, and the other end passes through guide rail Pulley on sliding block is connected with counterweight, and it includes motor and screw slide that guide rail, which assists moving assembly, is made under the driving of motor Screw slide move, and then drive hanging rail component in can translating rails movement, remain able to translating rails and be unfolded The surface of unfolding mechanism suspension strop hanging ring is always positioned in journey.

2. a kind of zero-g hanging test device for cylinder unwrapping mechanism according to claim 1, which is characterized in that The support component includes frame, supporting guide, fixed supporting seat, mobile support base；Frame is cuboid, supporting guide It is fixedly installed on a crossbeam of frame facet, fixed supporting seat is fixedly installed on supporting guide, fixed supporting seat and frame It is located in same vertical plane for installing the crossbeam of fixed long guideway above frame, mobile support base is installed on supporting guide, Can be moved along guide rail, the shaft of the outermost lateral joint junction of cylinder unwrapping mechanism respectively with fixed supporting seat and mobile support base On bearing block be connected, the expansion and gathering for realizing cylinder unwrapping mechanism are moved back and forth along guide rail by mobile support base.

3. a kind of zero-g hanging test device for cylinder unwrapping mechanism according to claim 1, which is characterized in that The hanging rail component includes fixed long guideway, fixed short lead rail, connection sliding block, mobile long guideway, sliding block, pulley, hangs Lanyard and counterweight；Fixed long guideway is fixedly installed on longitudinal crossbeam above frame, and with fixed supporting seat positioned at same In plane；Fixed short lead rail shares two, is fixedly installed in respectively in the transverse cross beams above frame；In two fixed short lead rails Being separately installed with one can be along the connection sliding block that guide rail moves, and mobile long guideway is connected with two connection sliding blocks；Fixed long guideway It is separately installed with on mobile long guideway and pulley can be installed on the sliding block that guide rail moves, each sliding block；Suspension strop one end It is connected with the hanging ring in cylinder unwrapping mechanism, the other end is connected around pulley with counterweight, and weight mass is hung with corresponding suspension strop Hanging column face unfolding mechanism part is equal in weight.

4. a kind of zero-g hanging test device for cylinder unwrapping mechanism according to claim 1, which is characterized in that The guide rail auxiliary moving assembly includes pedestal, leading screw, slide unit, motor and link block；Pedestal both ends are fixedly installed in respectively Frame roof；Leading screw both ends are mounted on the base by bearing, are connected by shaft coupling with motor；Slide unit is installed on leading screw, It is rotated in the driving lower leading screw of motor, and slide unit is driven to be moved along leading screw direction；Link block one end is connected with slide unit, the other end with Mobile long guideway is connected, and slide unit movement drives mobile long guideway movement.

5. a kind of zero-g hanging test device for cylinder unwrapping mechanism according to claim 1, which is characterized in that When the zero-g hanging test device is for the cylinder unwrapping mechanism with multiple row after extending transversely, each row unwinder A corresponding root long guide rail right over structure hanging ring, the corresponding guide rail of first row are fixed long guideway, are fixedly linked with frame；2nd It arranges to the corresponding mobile long guideway of the n-th row and is connected with leading screw by slide unit；Leading screw in each component passes through gear train and motor phase Even, each gear speed ratio is 1, and motor rotation is transmitted on each leading screw, and the corresponding leading screw screw pitch of the i-th row is corresponding with the 2nd row The ratio between leading screw screw pitch be i-1, i.e., the corresponding moving long guide moving velocity of the i-th row is that the corresponding mobile long guideway of the 2nd row moves I-1 times of dynamic speed realizes the driving by a motor so that each mobile long guideway is always during unfolding mechanism is unfolded Positioned at the surface of corresponding hanging ring.