Scissor unfolding mechanism drive

Abstract

The present application relates to a kind of scissor unfolding mechanism driving device, including drive unit assembly, gear rope wheel shaft assembly, bottom support shaft assembly, support rope assembly, support base plate, bottom support rod assembly, bottom support rod linkage assembly and drive rope, bottom support rod assembly includes drive rope guide wheel and drive rope fixed wheel, drive rope from gear rope wheel shaft assembly, bypass drive rope guide wheel, fixed on the drive rope fixed wheel of other side bottom support rod assembly, two sides bottom support shaft assembly is connected by bottom support rod linkage assembly and realizes synchronous reverse motion, by the way of gear transmission and rope wheel transmission combination, the rotation of drive unit assembly is converted into the rotation of scissor unfolding mechanism bottom support rod, to drive the unfolding of scissor unfolding mechanism, with the advantages of light weight, high reliability, large driving force.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of space vehicle deployment mechanism, and particularly relates to a scissor type deployment mechanism driving device. BACKGROUND

[0002] Deployable mechanism is one of the important research topics in the field of space mechanism, and the scissor type folding and deployment mechanism has broad application prospects in the field of space deployable mechanism due to its compact structure.

[0003] Internet satellite constellation and other flat stacked satellites have low-cost, batch production, high storage ratio and other requirements for solar wings. The application proposes a high-reliability scissor type deployment mechanism driving method for the scissor type deployment mechanism, which can be used for high-reliability deployment of the scissor type deployment mechanism, has the characteristics of small space occupation, large deployment force generated, and high reliability.

[0004] Patent CN202210924857.7 discloses a scissor type solar wing system, which uses a scissor type deployment mechanism as a flexible solar wing deployment mechanism. The driving method of the scissor type deployment mechanism is to drive the transmission mechanism to rotate through the driving assembly, and then directly drive the root scissor lever assembly to rotate, so as to realize the conversion of the rotary motion of the lever into the linear motion of the end of the scissor lever. The driving method of this scissor lever deployment mechanism has the advantages of small folding size and simple structure, but has the disadvantages of high driving capacity requirement of the driving mechanism, low transmission efficiency, and difficulty in providing large deployment driving force.

[0005] Patent CN201611072980.1 discloses a rope driven scissor truss structure, which passes through the scissor lever deployment mechanism by two driving ropes, and realizes the reversing of the driving ropes through a set of pulley blocks. In this way, a larger deployment driving force can be achieved, but the structure is complex, the assembly difficulty is high, and the more guide pulleys occupy a large space and have the disadvantage of heavy weight.

[0006] Patent CN201810806678.7 discloses a double-layer deployable antenna mechanism based on a scissor type mechanism torsional spring driving, which realizes deployment driving through a torsional spring assembly. The torsional spring assembly includes a torsional spring support, a torsional spring, a pin shaft and a rigid hinge. The torsional spring is used as a driving source to realize motorless driving deployment, but in order to obtain a larger driving force, a larger size and a larger number of torsional springs are required, which still has the problems of large space occupation and heavy weight, and needs to be further optimized. SUMMARY

[0007] The present application aims at overcoming the above-mentioned defects of the prior art, and provides a scissors-type unfolding mechanism driving device which converts the rotation of a driving unit assembly into the rotation of a bottom support rod of a scissors-type unfolding mechanism through a driving unit assembly driving and gear + rope wheel transmission mode, so as to drive the unfolding of the scissors-type unfolding mechanism.

[0008] The above-mentioned objects of the present application are mainly achieved by the following technical solutions:

[0009] The present application aims at overcoming the above-mentioned defects of the prior art, and provides a scissors-type unfolding mechanism driving device which converts the rotation of a driving unit assembly into the rotation of a bottom support rod of a scissors-type unfolding mechanism through a driving unit assembly driving and gear + rope wheel transmission mode, so as to drive the unfolding of the scissors-type unfolding mechanism.

[0010] When the driving device is in a folded state, the bottom support rod assembly is in a horizontal state, and the driving rope is lifted through the supporting rope assembly, so that the height of the driving rope is higher than the height of the driving rope guide wheel.

[0011] The gear rope wheel shaft assembly comprises a transmission gear, an intermediate rope wheel, a gear rope wheel shaft and an axial positioning nail, the transmission gear and the intermediate rope wheel are coaxially installed on the gear rope wheel shaft and are constrained from axial displacement through the axial positioning nail; the transmission gears in the two gear rope wheel shaft assemblies are engaged with each other, and the driving unit assembly drives the transmission gears and the intermediate rope wheels to rotate synchronously.

[0012] The driving unit assembly comprises a driving assembly and a driving gear, the driving gear is arranged on the driving assembly, the driving gear is engaged with the transmission gear, and when the driving device works, the driving gear drives the transmission gear to rotate, so that the intermediate rope wheel in the gear rope wheel shaft assembly rotates reversely, the driving rope is continuously tightened, and the bottom support rod assembly rotates.

[0013] The bottom support shaft assembly comprises a hexagonal shaft and a linkage rope wheel, the linkage rope wheel is fixedly installed on the hexagonal shaft and rotates synchronously with the hexagonal shaft, and the hexagonal section of the hexagonal shaft is fixedly connected with the bottom support rod assembly.

[0014] The stay rope assembly comprises a stay rope wheel, a stay rope wheel support and a stay rope wheel baffle, the stay rope wheel is installed on the stay rope wheel support, and the stay rope wheel baffle is installed on the stay rope wheel support to prevent the driving rope from being pulled out of the stay rope wheel.

[0015] The center surfaces of the driving rope guide wheel and the stay rope wheel coincide.

[0016] The bottom support rod assembly further comprises a support rod, two hexagonal hole metal joints, a hinge shaft and a hinge joint, the two hexagonal hole metal joints are arranged at the two ends of the support rod respectively, the support rod is glued and fixed with the hexagonal hole metal joint and the hinge joint, the hinge shaft is arranged in the hinge joint, and the driving rope guide wheel and the driving rope fixing wheel are arranged on the hinge shaft.

[0017] The bottom support rod linkage assembly comprises a bottom support rod linkage rope and a linkage rope guide wheel set, the two ends of the bottom support rod linkage rope are connected with the two bottom support shaft assemblies, and the bottom support rod linkage rope is guided and positionally constrained through the linkage rope guide wheel set arranged on the support bottom plate.

[0018] The driving assembly unit is fixedly installed on the support bottom plate through a driving assembly support, the gear rope wheel shaft assembly is fixedly installed on the support bottom plate through a gear rope wheel shaft support, and the bottom support shaft assembly is fixedly installed on the support bottom plate through a hexagonal shaft support.

[0019] Compared with the prior art, the present application has at least the following beneficial effects:

[0020] (1) The scissor type unfolding mechanism driving device of the present application drives the rotation of the driving unit assembly, converts the rotation of the driving unit assembly into the rotation of the bottom support rod of the scissor type unfolding mechanism through gear + rope wheel transmission, and drives the unfolding of the scissor type unfolding mechanism, thereby having the advantages of light weight, high reliability and large driving force.

[0021] (2) The transmission mechanism of the present application preferably adopts a combination of gear transmission and rope transmission, the gear transmission part comprises three intermeshing gears, different unfolding driving characteristics are obtained by adjusting the gear reduction ratio, the driving unit assembly drives the gears to drive the other two gears as the driving source of the rope wheel, and then drives the synchronous rotation of the two sets of rope wheel mechanisms.

[0022] (3) The rope wheel transmission of the present application preferably adopts the winding of the intermediate rope wheel to realize the rotation of the bottom support rod, the driving rope is wound around the driving rope guide wheel at the end of the bottom support rod and then connected to the driving rope fixing wheel at the other end of the bottom support rod, as the driving rope is wound on the intermediate rope wheel, the length of the driving rope gradually becomes shorter, and then the bottom support rod is pulled out from the end of the bottom support rod.

[0023] (4), the two side bottom support rods of the present application are preferably connected in linkage by bottom support rod linkage assembly, linkage rope wheels are installed on the mounting axes of the two side bottom support rods and the bottom support shaft assembly, and are fixedly connected with the bottom support rods to move synchronously, the bottom support rod linkage ropes are reversely connected with the linkage rope wheels of the two side bottom support rods, and move in the required track direction through linkage rope guide rope groups, so that the synchronous reverse movement of the two bottom support rods is realized. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 it is a schematic diagram of the driving device principle of the scissor type unfolding mechanism of the present application;

[0025] Figure 2 it is a schematic diagram of the driving device composition of the scissor type unfolding mechanism of the present application;

[0026] Figure 3 it is an enlarged view of the bottom of the driving device in the folded state of the scissor type unfolding mechanism of the present application;

[0027] Figure 4 it is a schematic diagram of the gear rope wheel shaft assembly of the driving device of the scissor type unfolding mechanism of the present application;

[0028] Figure 5 it is a schematic diagram of the bottom support rod assembly in the folded state of the driving device of the scissor type unfolding mechanism of the present application;

[0029] Figure 6 it is a schematic diagram of the bottom support shaft assembly and the bottom support rod linkage assembly of the driving device of the scissor type unfolding mechanism of the present application. DETAILED DESCRIPTION

[0030] The present application will be further described in detail below in combination with the drawings and specific embodiments:

[0031] As Figure 2As shown, the scissors type unfolding mechanism driving device includes a driving unit assembly 1, a gear rope wheel shaft assembly 2, a bottom support shaft assembly 3, a supporting rope assembly 4, a supporting bottom plate 5, a bottom support rod assembly 6, a bottom support rod linkage assembly 7 and a driving rope 8. Wherein figure (a) is the scissors rod unfolding mechanism driving device in the folding state, figure (b) is the scissors rod unfolding mechanism driving device in the unfolding state. The driving unit assembly 1 includes a driving assembly 101, a driving assembly support 102 and a driving gear 103; the gear rope wheel shaft assembly 2 includes a transmission gear 201, an intermediate rope wheel 202, a gear rope wheel shaft 203, a gear rope wheel shaft support 204 and an axial positioning nail 205; the bottom support shaft assembly 3 includes a hexagonal shaft 301, a hexagonal shaft support 302 and a linkage rope wheel 303; the supporting rope assembly 4 includes a supporting rope wheel 401, a supporting rope wheel support 402 and a supporting rope wheel baffle 403; the bottom support rod assembly 6 includes a support rod 601, a hexagonal hole metal joint 602, a hinge shaft 603, a hinge joint 604, a driving rope guide wheel 605 and a driving rope fixed wheel 606; the bottom support rod linkage assembly 7 includes a bottom support rod linkage rope 701 and a linkage rope guide wheel set 702.

[0032] The left and right two bottom support rod assemblies 6 are installed on the supporting bottom plate 5 through the bottom support shaft assembly 3, and two gear rope wheel shaft assemblies 2 and two supporting rope assemblies 4 are installed between the left and right two bottom support shaft assemblies 3. The left and right two bottom support rod assemblies 6 are fixedly connected with the linkage rope wheels 303, and the linkage rope wheels 303 on the left and right sides are connected through the bottom support rod linkage assembly 7 and realize synchronous reverse motion. In the folding state, the bottom support rod assembly 6 is in the near horizontal state, at this time, the driving rope 8 is the longest, the driving rope 8 is supported by the supporting rope assembly 4 and is higher than the driving rope guide wheel 605.

[0033] As shown in the drawings, Figure 1 The specific working principle and process of the present application are as follows: the driving unit assembly 1 drives the two intermediate rope wheels 202 to rotate in a gear transmission manner, and then the rope wheel reeling is driven, the driving rope 8 starts from the intermediate rope wheel 202, passes through the driving rope guide wheel 605 at the end of the bottom support rod assembly 6 on one side, and is fixed on the driving rope fixed wheel 606 at the end of the bottom support rod assembly 6 on the other side, and the rope wheel reeling will pull the bottom support rod assembly 6 to rotate and unfold. In the initial stage of unfolding, in order to provide greater unfolding driving force, the driving rope 8 is supported to a certain height by using the supporting rope wheel 401, so that the driving rope 8 can generate an upward component force at the end of the bottom support rod assembly 6. In order to ensure that the two bottom support rod assemblies 6 can rotate synchronously, the linkage rope wheels 303 fixed with the two bottom support rod assemblies 6 are connected by using the bottom support rod linkage rope 701, and the direction is changed through the linkage rope guide wheel set 702, so that the linkage rope wheels 303 on the left and right sides can rotate synchronously and reversely.

[0034] The driving assembly unit 1, the gear rope wheel shaft assembly 2, the bottom support shaft assembly 3, the supporting rope assembly 4 and the bottom support rod linkage assembly 7 are all installed on the support base plate 5, wherein two sets of the same gear rope wheel shaft assembly 2, the bottom support shaft assembly 3 and the supporting rope assembly 4 are arranged on the left and right sides of the support base plate 5, as shown in Figure 2 , Figure 3 .

[0035] The driving assembly unit 1 is fixedly installed on the support base plate 5 through the driving assembly support 102, the gear rope wheel shaft assembly 2 is fixedly installed on the support base plate 5 through the gear rope wheel shaft support 204, the bottom support shaft assembly 3 is fixedly installed on the support base plate 5 through the hexagonal shaft support 302, and the supporting rope assembly 4 is fixedly installed on the support base plate 5 through the supporting rope wheel support 402, as shown in Figure 3 .

[0036] The driving gear 103 is installed at the end of the driving assembly 101 in the driving assembly unit 1, and the driving assembly 101 is fixedly installed on the driving assembly support 102. The driving gear 103 is engaged with the transmission gear 201 in the gear rope wheel shaft assembly 2 close to one side of the driving gear 103, and the transmission gears 201 in the two gear rope wheel shaft assemblies 2 are engaged with each other, as shown in Figure 3 .

[0037] The transmission gear 201 and the intermediate rope wheel 202 are coaxially installed on the gear rope wheel shaft 203 and are constrained from axial displacement by the axial positioning nail 205. The transmission gear 201 and the intermediate rope wheel 202 are fixed in position relative to the gear rope wheel shaft 203. When the driving gear 103 at the end of the driving assembly unit 1 rotates, it can drive the transmission gears 201 and the intermediate rope wheels 202 in the two gear rope wheel shaft assemblies 2 to rotate synchronously. The gear rope wheel shaft 203 is installed on the gear rope wheel shaft support 204, as shown in Figure 4 .

[0038] The hexagonal shaft 301 is installed on the hexagonal shaft support 302, and the installation surface of the hexagonal shaft support 302 is a cylindrical surface, so the hexagonal shaft 301 can rotate freely. The linkage rope wheel 303 is fixedly installed on the hexagonal shaft 301 and rotates synchronously with the hexagonal shaft 301. The hexagonal section of the hexagonal shaft 301 is fixedly connected with the hexagonal hole metal joint 602 in the bottom support rod assembly 6, as shown in Figure 5 , Figure 6 .

[0039] The supporting rope wheel 401 is installed on the supporting rope wheel support 402 and can rotate freely around the axis, and the supporting rope wheel blocking plate 403 is installed on the supporting rope wheel support 402 to prevent the driving rope 8 from accidentally coming off the supporting rope wheel 401, as shown in Figure 3 .

[0040] The support rod 601 in the bottom support rod assembly 6 is glued and fixed with the hexagonal hole metal joint 602 and the hinge joint 604 at both ends, the hinge joint 604 is penetrated by the hinge shaft 603, and the driving rope guide wheel 605 and the driving rope fixing wheel 606 are installed on the hinge shaft 603, as shown in Figure 5 .

[0041] The linkage rope 701 in the bottom support rod linkage assembly 7 is connected with the two linkage rope wheels 303 on the left and right sides, and is guided and positionally constrained through the linkage rope guide wheel set 702 installed on the support bottom plate 5, as shown in Figure 6 .

[0042] The center surfaces of the driving rope guide wheel 605, the support rope wheel 401 and the intermediate rope wheel 202 are coincident, so as to reduce the additional torque in the unfolding process.

[0043] The above is only the best specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

[0044] The contents not described in detail in the specification of the present application belong to the known technology of the person skilled in the art.

Claims

1. A scissor unfolding mechanism drive apparatus, characterized by: The utility model provides an expandable device, including drive unit assembly (1), gear rope pulley shaft assembly (2), bottom support shaft assembly (3), support rope assembly (4), support bottom plate (5), bottom support rod assembly (6), bottom support rod linkage assembly (7) and drive rope (8), two sets of gear rope pulley shaft assembly (2), bottom support shaft assembly (3) and support rope assembly (4) are set up on support bottom plate (5) respectively, both sides bottom support rod assembly (6) are connected with bottom support shaft assembly (3) respectively, bottom support rod assembly (6) includes drive rope guide wheel (605) and drive rope fixed wheel (606), drive rope (8) is wound on gear rope pulley shaft assembly (2), starting from gear rope pulley shaft assembly (2), pass through drive rope guide wheel (605), support through support rope assembly (4) and are fixed on the drive rope fixed wheel (606) of another side bottom support rod assembly (6), both sides bottom support shaft assembly (3) are connected through bottom support rod linkage assembly (7) and realize synchronous reverse motion, drive unit assembly (1) drives gear rope pulley shaft assembly (2) and realizes the drive of expansion mechanism.

2. A scissor deployment mechanism drive according to claim 1, wherein: When the drive device is in the state of being contracted, the bottom support rod assembly (6) is in a horizontal state, and the drive rope (8) is supported by the support rope assembly (4) so that the height of the drive rope (8) is higher than the height of the drive rope guide wheel (605).

3. A scissor deployment mechanism drive according to claim 1, wherein: The gear rope pulley shaft assembly (2) comprises a transmission gear (201), an intermediate rope pulley (202), a gear rope pulley shaft (203) and an axial positioning nail (205). The transmission gear (201) and the intermediate rope pulley (202) are coaxially installed on the gear rope pulley shaft (203) and are constrained from axial displacement by the axial positioning nail (205). The transmission gears (201) in the two gear rope pulley shaft assemblies (2) are meshed with each other, and the drive unit assembly (1) drives the transmission gears (201) and the intermediate rope pulley (202) to rotate synchronously.

4. A scissor deployment mechanism drive according to claim 3, wherein: The drive unit assembly (1) comprises a drive assembly (101) and a drive gear (103). The drive gear (103) is arranged on the drive assembly (101) and is meshed with the transmission gear (201). When the drive device is in operation, the drive gear (103) drives the transmission gear (201) to rotate, so that the intermediate rope pulley (202) in the gear rope pulley shaft assembly (2) rotates reversely, and the drive rope (8) is continuously tightened to make the bottom support rod assembly rotate.

5. The scissor deployment mechanism drive of claim 1, wherein: The bottom support shaft assembly (3) comprises a hexagonal shaft (301) and a linkage rope pulley (303). The linkage rope pulley (303) is fixedly installed on the hexagonal shaft (301) and rotates synchronously with the hexagonal shaft (301). The hexagonal section of the hexagonal shaft (301) is fixedly connected with the bottom support rod assembly (6).

6. A scissor deployment mechanism drive according to claim 1, wherein: The support rope assembly (4) comprises a support rope pulley (401), a support rope pulley support (402) and a support rope pulley baffle (403). The support rope pulley (401) is installed on the support rope pulley support (402), and the support rope pulley baffle (403) is installed on the support rope pulley support (402) to prevent the drive rope (8) from being detached from the support rope pulley (401).

7. A scissor deployment mechanism drive according to claim 6, wherein: The centers of the drive rope guide wheel (605) and the support rope pulley (401) coincide.

8. The scissor deployment mechanism drive of claim 1, wherein: The bottom support rod assembly (6) further comprises a support rod (601), two hexagonal hole metal joints (602), a hinge shaft (603) and a hinge joint (604), the two hexagonal hole metal joints (602) are respectively arranged at two ends of the support rod (601), the support rod (601) is glued and fixed with the hexagonal hole metal joints (602) and the hinge joint (604), the hinge joint (604) is penetrated by the hinge shaft (603), and a driving rope guide wheel (605) and a driving rope fixing wheel (606) are arranged on the hinge shaft (603).

9. The scissor deployment mechanism drive of claim 1, wherein: The bottom support rod linkage assembly (7) comprises a bottom support rod linkage rope (701) and a linkage rope guide wheel set (702), two ends of the bottom support rod linkage rope (701) are connected with the two bottom support shaft assemblies (3), and the linkage rope guide wheel set (702) mounted on the support bottom plate (5) is used for guiding and position restricting.

10. The scissor deployment mechanism drive of claim 1, wherein: The driving unit assembly (1) is mounted and fixed with the support bottom plate (5) through a driving assembly support (102), the gear rope wheel shaft assembly (2) is mounted and fixed with the support bottom plate (5) through a gear rope wheel shaft support (204), and the bottom support shaft assembly (3) is mounted and fixed with the support bottom plate (5) through a hexagonal shaft support (302).

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