An assembly tool for an inertial measurement unit motor

Abstract

The utility model provides a kind of assembly tool for inertial unit motor.The assembly tool for inertial unit motor includes base, support, transmission mechanism and support, the first clamping mechanism is equipped on the base, the second clamping mechanism coaxially arranged with first clamping mechanism is equipped on the support, the first clamping mechanism includes first holder and first positioning block, the first holder is installed in base, the first holder axial extension to make at least two the first positioning block radial extension;The second clamping mechanism includes second holder and second positioning block, the second holder is installed on support, the second holder axial extension to make at least two the second positioning block radial extension.The utility model changes the mode of helix to the mode of linear displacement, avoids the problem that the radial clearance between pitch leads to coaxiality difference, can improve the assembly accuracy of inertial unit motor.

Description

Technical Field

[0001] This utility model relates to the field of aerospace product component assembly technology, and in particular to an assembly fixture for inertial navigation system motors. Background Technology

[0002] The frameless torque motor used in inertial navigation systems mainly consists of a rotor and a stator. During assembly, the rotor needs to be installed into the stator. Both the rotor and stator are made of magnetic materials, and they have a strong magnetic attraction when assembled. In order to ensure the stability of the installation process, they are mostly assembled by screwing in. However, this method has the following problems during use: (i) The screw drive has slight radial wobble, which may cause the stator to collide with the rotor during assembly, making it difficult to ensure the coaxiality of the assembly; (ii) The rotor and stator need to be fixed to the tooling platform with screws, which makes the installation and disassembly relatively cumbersome. Utility Model Content

[0003] The purpose of this invention is to provide an assembly fixture for inertial navigation system (INS) motors, which can improve the assembly accuracy of INS motors.

[0004] The technical solution of this utility model is: an assembly fixture for an inertial navigation system (INS) motor, comprising a base, a support vertically mounted on the base, a transmission mechanism mounted on the support, and a bracket that moves vertically up and down along the support via the transmission mechanism. The base is provided with a first clamping mechanism, and the bracket is provided with a second clamping mechanism. The first and second clamping mechanisms are coaxially arranged. The first clamping mechanism includes a first clamp and at least two first positioning blocks. The first clamp is mounted in the base, and the at least two first positioning blocks are arranged around the outer periphery of the first clamp. The first clamp extends axially to allow the at least two first positioning blocks to extend radially. The second clamping mechanism includes a second clamp and at least two second positioning blocks. The second clamp is mounted on the bracket, and the at least two second positioning blocks are arranged around the outer periphery of the second clamp. The second clamp extends axially to allow the at least two second positioning blocks to extend radially.

[0005] Preferably, the first positioning block is slidably connected to the base, and the second positioning block is slidably connected to the bracket.

[0006] Preferably, the side surface of the support is provided with a slide, and a stop and a slider are sequentially connected on the side of the bracket away from the second clamping mechanism, and the slider is slidably connected to the slide.

[0007] Preferably, the side surface of the support is provided with a photoelectric switch, and two photoelectric switches are arranged vertically, and the photoelectric switches are adapted to the stop block.

[0008] Preferably, the transmission mechanism includes a motor mounted on the support, a synchronous pulley connected to the output shaft of the motor, a driven pulley mounted on the base, and a synchronous belt connecting the synchronous pulley and the driven pulley, with the bracket fixed to the synchronous belt.

[0009] Preferably, the inertial motor assembly fixture further includes a tension spring, the upper end of which is connected to the support, and the lower end of which is connected to the bracket.

[0010] Preferably, the first positioning block is fan-shaped, and its end is provided with an arc-shaped locking step.

[0011] Preferably, the second positioning block is fan-shaped, and its outer circular surface forms a snap-fit ​​surface.

[0012] Compared with related technologies, the beneficial effects of this utility model are as follows: First, changing the spiral method to a linear displacement method avoids the problem of poor coaxiality caused by the radial clearance between the pitches, which can improve the assembly accuracy of the inertial motor. Second, linear displacement is achieved through motors, synchronous pulleys, synchronous belts, etc., which is easy to implement and the assembly speed is faster than the screw-twisting method; Third, the positioning of the stator and rotor is achieved by extending the clamp axially so that the second positioning block extends radially. On the one hand, it can adapt to the assembly of rotors and stators of different sizes. On the other hand, it is quick to assemble and disassemble, which is more time-saving and labor-saving than fixing the stator and rotor with screws. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the assembly fixture for an inertial navigation system motor provided by this utility model. Figure 2 This is a schematic diagram of the structure of the first clamp; Figure 3 This is a schematic diagram of the second clamp; Figure 4 This is a schematic diagram of the assembly tooling for the inertial navigation system motor provided by this utility model in use.

[0014] In the attached diagram: 1. Base; 2. Support; 3. Bracket; 4. First clamping mechanism; 41. First clamp; 42. First positioning block; 43. Snap-fit ​​step; 5. Second clamping mechanism; 51. Second clamp; 52. Second positioning block; 53. Snap-fit ​​surface; 6. Transmission mechanism; 61. Motor; 62. Synchronous pulley; 63. Driven pulley; 64. Synchronous belt; 65. Slide; 7. Stop; 8. Slider; 9. Photoelectric switch; 101. Tension spring; 10. Rotor; 20. Assembly fixture; 30. Stator. Detailed Implementation

[0015] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0016] like Figure 1 As shown, the assembly fixture 20 for an inertial navigation system motor provided in this embodiment includes a base 1, a support 2, a bracket 3, a first clamping mechanism 4, a second clamping mechanism 5, a transmission mechanism 6, a stop 7, a slider 8, a photoelectric switch 9, and a tension spring 101.

[0017] The base 1 has a box-shaped structure, with its upper surface used for support. Control circuitry and electrical components are installed inside. The upper surface of the base 1 has a circular hole. The first clamping mechanism 4 includes a first clamp 41 and three first positioning blocks 42. Figure 2 As shown, the first gripper 41 is a pneumatic gripper of model CKA-25AS, which has an internal cylinder and three sliding blocks on its radial surface. The three first positioning blocks 42 are installed on the three sliding blocks one-to-one by screws, so that the first positioning blocks 42 move together with the sliding blocks. The first positioning blocks 42 are fan-shaped, and the side of the three first positioning blocks 42 that is far apart from each other has an arc-shaped locking step 43.

[0018] In the initial position, the three first positioning blocks 42 are open, and the stator 30 is positioned between the three first positioning blocks 42 and on the horizontal surface of the engaging step 43. When the air source is connected, gas enters the first clamp 41 through the guide valve, and the piston of the cylinder extends outward, pushing the three sliding blocks and the three first positioning blocks 42 on its radial surface to move inward until the vertical surface of the three engaging steps 43 engages with the outer circular surface of the stator 30 (e.g., ...). Figure 4 As shown, the stator 30 is locked. When the air source is turned off, the first clamp 41 stops working, and the clamping force on the stator 30 is fixed, thus achieving effective clamping of the stator 30. When the first clamp 41 moves in the reverse direction, the stator 30 is released.

[0019] The support 2 is a flat plate structure, which is vertically mounted on the base 1. The side surface of the support 2 facing the first clamping mechanism 4 is the mounting surface.

[0020] The bracket 3 is an L-shaped plate bent downwards. The second clamping mechanism 5 includes a second clamp 51 and three second positioning blocks 52. The second clamp 51 is suspended on the horizontal plate of the bracket 3. The second positioning blocks 52 are fan-shaped, and their outer circular surfaces form a snap-fit ​​surface 53.

[0021] like Figure 3 As shown, the second gripper 51 is a pneumatic gripper of model CKA-15AS, which has an internal cylinder and three sliding blocks on its radial surface. The three second positioning blocks 52 are installed on the three sliding blocks one by one with screws, so that the second positioning blocks 52 move together with the sliding blocks.

[0022] In the initial position, the three second positioning blocks 52 are retracted, and the rotor 10 is fitted onto the outside of the three second positioning blocks 52. When the air source is connected, gas enters the second clamp 51 through the guide valve, and the piston of the cylinder extends outward, which can push the three sliding blocks and the three second positioning blocks 52 on its radial surface to move outward until the three engaging surfaces 53 engage with the inner circular surface of the rotor 10 (e.g., Figure 4 As shown, the rotor 10 is locked. When the air source is turned off, the second clamp 51 stops working, and the clamping force on the rotor 10 is also fixed, thus achieving effective clamping of the rotor 10. When the second clamp 51 moves in the reverse direction, it releases the rotor 10.

[0023] The bracket 3 is driven to move linearly up and down via a transmission mechanism 6. Linear up and down displacement means that both the driving end and the force-bearing end are linear, not helical. The transmission mechanism 6 can be a cylinder, a hydraulic cylinder, or a motor. In this embodiment, the transmission mechanism 6 includes a motor 61 mounted on the support 2, a synchronous pulley 62 connected to the output shaft of the motor 61, a driven pulley 63 rotatably mounted on the base 1, a synchronous belt 64 connecting the synchronous pulley 62 and the driven pulley 63, and a slide block 65 mounted on the mounting surface of the support 2. Two slide blocks 65 are spaced apart.

[0024] A stop block 7 and a slider 8 are sequentially connected to the side of the bracket 3 away from the second clamping mechanism 5. The stop block 7 and the slider 8 are evenly distributed at both ends of the bracket 3. The slider 8 is slidably connected to the slide block 65. The bracket 3 is fixed to the timing belt 64, or the inner side of the stop block 7 is fixed to the timing belt 64.

[0025] The motor 61 is started, driving the synchronous pulley 62 to rotate, which in turn causes the bracket 3 mounted on the synchronous belt 64 to move downward, so that the rotor 10 mounted on the bracket 3 can be installed in the stator 30. After the assembly is completed, the first clamping mechanism 4 and the second clamping mechanism 5 are released, and the motor 61 is driven to rotate in the opposite direction, lifting the bracket 3 upward.

[0026] Two photoelectric switches 9 are provided on the mounting surface of the support 2, and the two photoelectric switches 9 are arranged vertically at intervals. The extreme positions of the downward and upward displacement of the bracket 3 are both realized by the photoelectric switches 9, and the photoelectric switches 9 are electrically connected to the motor 61. When the bracket 3, the stop block 7 and the slider 8 move together to the lower or upper limit position, the stop block 7 blocks the beam of light from the photoelectric switch 9 and sends a signal to the motor 61 to control the motor 61 to start and stop.

[0027] The upper end of the tension spring 101 is connected to the support 2, and the lower end of the tension spring 101 is connected to the bracket 3. The tension of the synchronous belt 64 can be adjusted by the tension of the tension spring 101 to ensure that proper tension is maintained during the motor assembly process.

[0028] This utility model provides a clamp and a positioning block for quick clamping of the stator and rotor, respectively. By utilizing the guiding characteristics of the slide and the slider and the high-precision displacement driving characteristics of the transmission mechanism, the coaxial assembly of the stator and rotor can be achieved.

[0029] This invention can be directly used for the assembly of inertial motors, solving the shortcomings of screw-in assembly and repeated screw disassembly of tooling. To a certain extent, it can assemble rotors and stators of different sizes, improve the versatility of tooling, facilitate tooling standardization, and improve production efficiency.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An assembly fixture for an inertial navigation system motor, characterized in that, The device includes a base, a support vertically mounted on the base, a transmission mechanism mounted on the support, and a bracket that moves vertically up and down along the support via the transmission mechanism. The base has a first clamping mechanism, and the bracket has a second clamping mechanism. The first and second clamping mechanisms are coaxially arranged. The first clamping mechanism includes a first clamp and at least two first positioning blocks. The first clamp is mounted in the base, and the at least two first positioning blocks are arranged around the outer periphery of the first clamp. The first clamp extends axially to allow the at least two first positioning blocks to extend radially. The second clamping mechanism includes a second clamp and at least two second positioning blocks. The second clamp is mounted on the bracket, and the at least two second positioning blocks are arranged around the outer periphery of the second clamp. The second clamp extends axially to allow the at least two second positioning blocks to extend radially.

2. The assembly fixture for an inertial navigation system motor according to claim 1, characterized in that, The first positioning block is slidably connected to the base, and the second positioning block is slidably connected to the bracket.

3. The assembly fixture for an inertial navigation system motor according to claim 1, characterized in that, The side surface of the support is provided with a slide block, and a stop block and a slider are connected in sequence on the side of the bracket away from the second clamping mechanism. The slider is slidably connected to the slide block.

4. The assembly fixture for an inertial navigation system motor according to claim 3, characterized in that, The side surface of the support is provided with a photoelectric switch, and two photoelectric switches are arranged vertically. The photoelectric switches are adapted to the stop block.

5. The assembly fixture for an inertial navigation system motor according to claim 1, characterized in that, The transmission mechanism includes a motor mounted on the support, a synchronous pulley connected to the output shaft of the motor, a driven pulley mounted on the base, and a synchronous belt connecting the synchronous pulley and the driven pulley. The bracket is fixed to the synchronous belt.

6. The assembly fixture for an inertial navigation system motor according to claim 1, characterized in that, It also includes a tension spring, the upper end of which is connected to the support, and the lower end of which is connected to the bracket.

7. The assembly fixture for an inertial navigation system motor according to claim 1, characterized in that, The first positioning block is fan-shaped, and its end is provided with an arc-shaped locking step.

8. The assembly fixture for an inertial navigation system motor according to claim 1, characterized in that, The second positioning block is fan-shaped, and its outer circular surface forms a snap-fit ​​surface.

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