A low-torque space rotating mechanism harness arranging device and method

Abstract

The present invention provides a low-torque space rotating mechanism harness arrangement device and method, which solves the problems of large winding torque of the space rotating mechanism, random fluctuation of the winding torque, cable bending and friction wear, and low cable life and reliability. The present invention includes a cable fixing seat, a movable end threading disk, a cable sleeve, a fixed end threading disk and a rotating mechanism; the cable fixing seat is provided with a plurality of threading holes, and one end of the cable sleeve is connected to the cable fixing seat; the movable end threading disk is located in the cable sleeve, and the fixed end threading disk is fixed to the other end of the cable sleeve; the rotating mechanism is installed on the cable fixing seat and sleeved on the outside of the cable sleeve, and the rotating mechanism is connected to the fixed end threading disk; the movable end threading disk is provided with a plurality of movable end threading holes, and the fixed end threading disk is provided with fixed end threading holes corresponding to the movable end threading holes.

Description

Technical Field

[0001] The invention relates to a space precision motion mechanism, and in particular to a low-resistance torque space rotation mechanism harness arranging device and method. Background Art

[0002] The main function of the space motion mechanism is to carry the payload and realize the scanning, pointing and tracking of the payload to the designated airspace or the predetermined target. The payload is installed at the rotating end of the motion mechanism. When working normally, it needs to receive instructions, send data, measure and control temperature, and supply power. These functions all require a certain number of cables installed inside the space rotation mechanism to realize the power and signal interaction between the payload and the satellite payload resource manager.

[0003] At present, there are two methods to achieve the management of payload harness of space rotating mechanism:

[0004] The first method is to bundle and tie the cables according to the equipment or function. The turning radius is determined according to the rotation range of the motion mechanism and the standard that the cables do not interfere with the surrounding parts when rotating within the working range. The cables are fixed with wire clips at the rotating and fixed ends, and the cables can rotate freely around the rotating axis during operation.

[0005] The second method is to combine the cables into a bundle, tie them loosely, and then pass the whole bundle of cables through the hollow rotating shaft. The cable length is determined based on the standard that the cables do not restrict the free rotation of the rotating mechanism within the working range. The cables are fixed with wire clips at the rotating end and the fixed end. The cables can twist freely in the rotating shaft during operation.

[0006] The two methods have the following disadvantages during the rotation of the motion mechanism:

[0007] (1) The winding torque has strong random fluctuations, which affects the stability of the motion speed of the spatial rotation mechanism.

[0008] (2) Cables will bend, rub and pull, which will seriously affect the life of the cables.

[0009] (3) The winding torque is greatly affected by various factors such as insulation layer, ambient temperature, vacuum low pressure, etc.

[0010] (4) To avoid interference and excessive pulling of the cable with surrounding components, it is only suitable for working within a small range.

[0011] Under the conditions of strict requirements on volume, weight, range of motion and speed stability of spatial rotating mechanisms, the current harness management method cannot meet the design requirements and urgently needs to be optimized and improved. Summary of the invention

[0012] The present invention provides a low-resistance torque space rotating mechanism harness tidying device and method, which solves the problems of large winding torque of the space rotating mechanism, random fluctuation of the winding torque, cable bending and friction wear, and low cable life and reliability.

[0013] To achieve the above object, the technical solution of the present invention is as follows:

[0014] A low-torque spatial rotating mechanism harness organizing device, which is special in that it includes a cable fixing seat, a movable end threading disk, a cable sleeve, a fixed end threading disk and a rotating mechanism; the cable fixing seat is provided with a plurality of threading holes, one end of the cable sleeve is connected to the cable fixing seat, and the interior of the cable sleeve is communicated with the interior of the cable fixing seat, and the cable bundle enters the cable fixing seat and the cable sleeve in turn through the threading holes; the movable end threading disk is located in the cable sleeve, and the fixed end threading disk is fixed to the other end of the cable sleeve, and there is a certain distance between the movable end threading disk and the fixed end threading disk; the rotating mechanism is coaxially installed on the cable fixing seat, and the rotating mechanism is sleeved on the outside of the cable sleeve, and the rotating mechanism is connected to the fixed end threading disk; the movable end threading disk is provided with a plurality of movable end wire passing holes, and the fixed end threading disk is provided with fixed end wire passing holes corresponding to the movable end wire passing holes.

[0015] Furthermore, the rotating mechanism includes a rotating part and a bearing platform; the rotating part includes a fixed cylinder, a rotating cylinder and a bearing, the fixed cylinder is coaxially installed on the cable fixing seat and is sleeved around the cable sleeve, and the rotating cylinder is installed on the inner side of the fixed cylinder through a bearing; the bearing platform is fixed to the upper end of the rotating cylinder of the rotating part and is connected to the fixed end threading disk.

[0016] Furthermore, the cable fixing seat is a cylindrical structure, with multiple threading holes evenly distributed on the side circumference, and a mounting hole is provided on the upper end surface. The cable sleeve is connected to the cable fixing seat through the mounting hole; the lower end of the fixing tube of the rotating part is connected to the upper end surface of the cable fixing seat.

[0017] Furthermore, the size of the movable end wire passing holes increases from the inside to the outside, and the size and number of the movable end wire passing holes are consistent with those of the fixed end wire passing holes.

[0018] Furthermore, the movable end threading disc and the fixed end threading disc are made of polytetrafluoroethylene material.

[0019] Furthermore, the diameters of the movable end wire holes on the same circumference are the same; the diameters of the fixed end wire holes on the same circumference are the same;

[0020] The hole spacing between two adjacent movable end wire passing holes located on the same circumference is more than twice the hole diameter thereof;

[0021] The hole spacing between two adjacent fixed-end wire-passing holes located on the same circumference is more than twice the hole diameter thereof.

[0022] A method for arranging wire harnesses of a space rotating mechanism with low resistance torque is special in that, based on the above-mentioned device for arranging wire harnesses of a space rotating mechanism with low resistance torque, the steps are as follows:

[0023] Step 1, divide the cables into multiple cable bundles, and feed each cable bundle into the cable fixing seat through multiple threading holes one by one;

[0024] Step 2, multiple cable bundles located in the cable fixing seat are fed into the cable sleeve, and the cable bundles pass through the movable end wire hole and the fixed end wire hole in the cable sleeve in sequence, and are finally fixed on the fixed end threading disk;

[0025] Step 3, the rotating mechanism starts to rotate, and drives the fixed end threading disk to start rotating, the fixed end threading disk drives the cable bundle to rotate, and the cable bundle drives the movable end threading disk to slide up and down in the cable sleeve, and finally the cable bundle forms a spindle shape in the cable sleeve;

[0026] Step 4, the rotating mechanism stops rotating, and the rotating mechanism returns to the initial position from the position when the rotation stops. At this time, the fixed end threading disk and the movable end threading disk rotate along with the mechanism to restore the initial state position.

[0027] Furthermore, the rotating mechanism includes a rotating member and a carrying platform;

[0028] In step 3, when the rotating part starts to rotate, it drives the supporting platform, the fixed end threading disk and several cable bundles to start rotating in turn. During the rotation process, the movable end threading disk slides up and down in the cable sleeve, so that the multiple cable bundles form a spindle shape in the cable sleeve.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] (1) In the present invention, a fixed-end threading disk and a movable-end threading disk are designed with a certain distance in between, so that a certain gap is formed between the two ends of the cable axially fixed. The cable management device avoids entanglement and friction between the wire bundles, and the absolute value of the winding torque is low and the fluctuation is small. The torque size is basically linearly related to the rotation position, and has little effect on the stability of the motion speed of the spatial rotation mechanism.

[0031] (2) In the present invention, the cable is rotated within a certain vertical space by cooperating with the fixed-end threading disk and the movable-end threading disk through the rotating mechanism. Therefore, the cable will not bend at a large angle during the rotation process, thereby improving the reliability of cable transmission.

[0032] (3) In the present invention, since the movable end threading disk and the fixed end threading disk are made of polytetrafluoroethylene material, the lubrication between the cable and the movable end threading disk and the fixed end threading disk is increased, so the cable will not generate serious friction and pulling during the rotation process, thereby improving the cable life and reliability.

[0033] (4) The management device of the present invention is small in size and light in weight, which can greatly reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0035] Figure 2 Schematic diagram of the structure of the cable fixing seat and the rotating mechanism in the embodiment of the present invention.

[0036] Figure 3 It is a schematic diagram of the structure of an embodiment of the present invention excluding the rotating mechanism (initial state).

[0037] Figure 4 It is a schematic diagram of the structure (initial state) of the embodiment of the present invention except the rotating mechanism and the threading disk at the movable end.

[0038] Figure 5 Schematic diagram of the structure of fixing cables by the movable end threading disk and the fixed end threading disk in an embodiment of the present invention (initial state).

[0039] Figure 6 It is a schematic diagram of the structure (winding state) except the rotating mechanism and the active end threading disk in an embodiment of the present invention.

[0040] Figure 7 It is a schematic diagram of the structure of fixing cables by the movable end threading disk and the fixed end threading disk in an embodiment of the present invention (winding state).

[0041] Figure 8 Schematic diagram of a cable bushing in an embodiment of the present invention.

[0042] Fig. 9 Schematic diagram of a cable fixing base in an embodiment of the present invention.

[0043] Fig.10 Schematic diagram of the active end threading disk in an embodiment of the present invention.

[0044] Fig.11 Schematic diagram of a fixed-end threading disk in an embodiment of the present invention.

[0045] Fig.12 This is a performance test diagram of the wire harness management device in an embodiment of the present invention.

[0046] The specific reference numerals are as follows:

[0047] 1-cable fixing seat, 11-threading hole, 12-installation hole, 2-movable end threading disc, 21-movable end threading hole, 3-cable sleeve, 4-fixed end threading disc, 41-fixed end threading hole, 5-rotating mechanism, 51-rotating part, 511-fixed cylinder, 512-bearing, 513-rotating cylinder, 52-carrying platform. DETAILED DESCRIPTION

[0048] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0049] like Figure 1 The wire harness tidying device of a space rotating mechanism with low resistance torque shown in the figure comprises a cable fixing seat 1, a movable end threading disc 2, a cable sleeve 3, a fixed end threading disc 4 and a rotating mechanism 5.

[0050] The cable sleeve 3 is installed at the center of the upper surface of the cable fixing seat 1, and the internal cavities of the two are connected, and the cable sleeve 3 can rotate on the cable fixing seat 1. The movable end threading disk 2 is located in the cable sleeve 3, and the fixed end threading disk 4 is fixedly installed on the upper end surface of the cable sleeve 3.

[0051] The rotating mechanism 5 is installed on the cable fixing seat 1 and is sleeved on the outside of the cable sleeve 3 , with a gap between the rotating mechanism 5 and the outer side surface of the cable sleeve 3 . The rotating mechanism 5 can rotate relative to the cable fixing seat 1 .

[0052] like Figure 2 As shown, the rotating mechanism includes a rotating member 51 and a bearing platform 52, the rotating member 51 is sleeved on the outside of the cable sleeve 3, and the lower end of the rotating member 51 is fixed to the upper surface of the cable fixing seat 1, and the bearing platform 52 is fixed to the upper end surface of the rotating member 51, wherein the bearing platform 52 is connected to the fixed end threading disk 4.

[0053] The rotating member 51 includes a fixed cylinder 511, a rotating cylinder 513 and a bearing 512. The fixed cylinder 511 is coaxially mounted on the cable fixing seat 1 and sleeved around the cable sleeve 3. The rotating cylinder 513 is mounted on the inner side of the fixed cylinder 511 through the bearing 512.

[0054] The carrying platform 52 is fixed to the upper end of the rotating cylinder 513 of the rotating member 51 and is connected to the fixed end threading disk 4 .

[0055] The rotating cylinder 513 rotates on the fixed cylinder 511 by means of the bearing 512 .

[0056] like Figure 3-Figure 9 As shown, the cable fixing seat 1 is a hollow cylindrical structure without a lower end surface, and a plurality of threading holes 11 are evenly arranged on its outer side wall for cables to enter the cable fixing seat 1. A mounting hole 12 is arranged on the upper end surface of the cable fixing seat 1. The cable sleeve 3 is connected to the cable fixing seat 1 through the mounting hole 12.

[0057] The fixed end threading disc 4 is fixed to the upper end surface of the cable sleeve 3 by screws, and the movable end threading disc 2 is located in the cable sleeve. The movable end threading disc 2 and the fixed end threading disc 4 are made of polytetrafluoroethylene material, whose condensable and volatile properties meet the requirements of space environment use and have certain lubricity, and the cable is less damaged during threading and use.

[0058] like Fig.10 As shown, the movable end threading disk 2 is evenly provided with movable end threading holes 21 that gradually increase in size from the inside to the outside; Fig.11 As shown, the fixed end threading disk 4 is evenly provided with fixed end threading holes 41 that are gradually enlarged from the inside to the outside. The movable end threading holes 21 are consistent in size and number with the fixed end threading holes 41. In the initial state, the movable end threading holes 21 correspond to the fixed end threading holes 41 one by one and are in the same phase.

[0059] On the movable end threading disk 2 and the fixed end threading disk 4, the apertures of the movable end threading holes 21 or the fixed end threading holes 41 located on the same circumference are equal, and the hole spacing between adjacent movable end threading holes 21 or fixed end threading holes 41 is more than twice their apertures, to ensure that no obvious squeezing occurs between the cables when the cables are twisted.

[0060] Based on the above-mentioned low-resistance torque space rotating mechanism harness arranging device, a low-resistance torque space rotating mechanism harness arranging method has the following specific steps:

[0061] Step 1, divide the cables into multiple cable bundles according to their functions and specifications, and feed the cable bundles into the cable fixing seat 1 through multiple threading holes 11 on the outer side wall of the cable fixing seat 1 one by one, that is, each threading hole 11 can only pass one cable bundle.

[0062] Step 2, several cable bundles located in the cable fixing seat 1 enter the cable sleeve 3 through the mounting hole 12 on the upper end surface of the cable fixing seat 1. When the cable bundles enter the cable sleeve 3, they must first pass through the movable end wire hole 21 on the movable end threading disk 2 located inside the cable sleeve 3. Each movable end wire hole 21 can only pass one cable bundle.

[0063] Step 3: Each cable bundle passes through the fixed-end wire hole 41 on the fixed-end wire threading disk 4 and is fixed on the fixed-end wire threading disk 4 .

[0064] In step 4, the rotating cylinder 513 in the rotating member 51 starts to rotate on the inner side of the fixed cylinder 511 by means of the bearing 512, and drives the supporting platform 52 and the fixed end threading disk 4 to rotate in turn, so that the cable bundle and the movable end threading disk 2 also start to rotate correspondingly.

[0065] During the rotation process, the active end threading disk 2 slides up and down in the cable sleeve 3. By reasonably designing the aperture and length of the cable sleeve 3, it is ensured that the rotating member 51 rotates to the maximum angle. Under the combined action of the rotation of the cable bundle and the up and down sliding of the active end threading disk 2, the cable bundle becomes a spindle shape in the cable sleeve 3, and the rotating mechanism 5 stops rotating.

[0066] When the fixed end threading drum 4 rotates from the initial position to the winding position along with the rotating member 51, the cable is phase-shifted at the fixed points of the movable end threading drum 2 and the fixed end threading drum 4. By utilizing the gap between the cables, the middle node of the cable shrinks toward the center along the diameter of the cable sleeve 3.

[0067] When the fixed end threading disc 4 returns to the initial position from the stop rotation position along with the rotating mechanism 5, the movable end threading disc 2 returns to the initial state.

[0068] like Fig.12 The figure shows the test curve of the winding torque of the harness management device within the working range. The horizontal axis is the working range of the rotating mechanism, and the vertical axis is the torque value. ① is the torque test curve of the cable rotating from the initial state to the positive maximum target position; ② is the torque test curve from the positive maximum target position to the negative maximum position; ③ is the torque test curve from the negative maximum position to the initial state. It can be seen from the figure that when the rotating mechanism rotates within the working range, the winding torque curve is smooth and the fluctuation is stable, which provides basic guarantee for the feasibility of high-stability control of the rotating mechanism.

Claims

1. A low-torque space rotating mechanism harness arrangement device, characterized in that: It comprises a cable fixing seat (1), a movable end threading disc (2), a cable sleeve (3), a fixed end threading disc (4) and a rotating mechanism (5); The cable fixing seat (1) is provided with a plurality of threading holes (11); one end of the cable sleeve (3) is connected to the cable fixing seat (1), and the interior of the cable sleeve (3) is communicated with the interior of the cable fixing seat (1); the cable bundle enters the cable fixing seat (1) and the cable sleeve (3) in sequence through the threading holes (11); The movable end threading disc (2) is located in the cable sleeve (3), the fixed end threading disc (4) is fixed to the other end of the cable sleeve (3), and there is a certain distance between the movable end threading disc (2) and the fixed end threading disc (4); The rotating mechanism (5) is coaxially mounted on the cable fixing seat (1), and the rotating mechanism (5) is sleeved on the outside of the cable sleeve (3), and the rotating mechanism (5) is connected to the fixed end threading disk (4); The movable end threading disk (2) is provided with a plurality of movable end threading holes (21), and the fixed end threading disk (4) is provided with fixed end threading holes (41) corresponding to the movable end threading holes (21); The movable end wire passing holes (21) gradually increase in size from the inside to the outside, and the movable end wire passing holes (21) and the fixed end wire passing holes (41) are consistent in size and number.

2. The low-torque space rotation mechanism harness arrangement device according to claim 1, characterized in that: The rotating mechanism (5) comprises a rotating member (51) and a carrying platform (52); The rotating member (51) comprises a fixed cylinder (511), a rotating cylinder (513) and a bearing (512); the fixed cylinder (511) is coaxially mounted on the cable fixing seat (1) and sleeved around the cable sleeve (3); the rotating cylinder (513) is mounted on the inner side of the fixed cylinder (511) via the bearing (512); The bearing platform (52) is fixed to the upper end of the rotating cylinder (513) of the rotating member (51), and is connected to the fixed end threading disk (4).

3. The low-torque space rotating mechanism harness arrangement device according to claim 2, characterized in that: The cable fixing seat (1) is a cylindrical structure, with a plurality of threading holes (11) evenly distributed on the side circumference, and a mounting hole (12) is provided on the upper end surface, and the cable sleeve (3) is connected to the cable fixing seat (1) through the mounting hole (12); the lower end of the fixing cylinder of the rotating member (51) is connected to the upper end surface of the cable fixing seat (1).

4. A low-torque space rotating mechanism harness arrangement device according to any one of claims 1 to 3, characterized in that: The movable end threading disc (2) and the fixed end threading disc (4) are made of polytetrafluoroethylene material.

5. The low-torque space rotating mechanism harness arrangement device according to claim 4, characterized in that: The movable end wire passing holes (21) located on the same circumference have the same aperture diameter; the fixed end wire passing holes (41) located on the same circumference have the same aperture diameter; The hole spacing between two adjacent movable end wire passing holes (21) located on the same circumference is more than twice the hole diameter thereof; The hole spacing between two adjacent fixed end wire passing holes (41) located on the same circumference is more than twice the hole diameter thereof.

6. A method for arranging the wiring harness of a space rotating mechanism with low resistance torque, characterized in that: Based on the low-torque space rotating mechanism harness arrangement device described in claim 1, the steps are as follows: Step 1, dividing the cables into a plurality of cable bundles, and feeding each cable bundle into the cable fixing seat (1) through a plurality of threading holes (11) one by one; Step 2, feeding a plurality of cable bundles in the cable fixing seat (1) into the cable sleeve (3), wherein the cable bundles sequentially pass through the movable end wire hole (21) and the fixed end wire hole (41) in the cable sleeve (3), and are finally fixed on the fixed end wire threading disk (4); Step 3, the rotating mechanism (5) starts to rotate, and drives the fixed end threading disk (4) to start rotating, the fixed end threading disk (4) drives the cable bundle to rotate, and the cable bundle drives the movable end threading disk (2) to slide up and down in the cable sleeve (3), and finally the cable bundle forms a spindle shape in the cable sleeve; Step 4, the rotating mechanism (5) stops rotating, and the rotating mechanism (5) returns to the initial position from the position when the rotation stops. At this time, the fixed end threading disk (4) and the movable end threading disk (2) rotate along with the rotating mechanism (5) to restore the initial state position.

7. The method for arranging the wiring harness of a space rotating mechanism with low resistance torque according to claim 6, characterized in that: The rotating mechanism comprises a rotating member (51) and a carrying platform (52); In step 3, when the rotating member (51) starts to rotate, it drives the supporting platform (52), the fixed end threading disk (4) and the plurality of cable bundles to start rotating in sequence. During the rotation process, the movable end threading disk (2) slides up and down in the cable sleeve (3), so that the plurality of cable bundles form a spindle shape in the cable sleeve (3).

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