Clamp for quickly assembling high-precision six-axis inertial navigation product

Abstract

The clamp comprises a shell, the shell is of a hollow tetragonal prism structure with an opening in one end, a positioning groove is formed in the inner bottom wall of the shell and used for positioning the high-precision six-axis inertial navigation product, a fastening bolt set is installed on the side wall of the shell, and the fastening bolt set is connected with the shell. The device further comprises a pressing piece set installed on the high-precision six-axis inertial navigation product, and the fastening bolt set and the pressing piece set are both used for clamping a sensor on the high-precision six-axis inertial navigation product. According to the utility model, inertial navigation products can be quickly assembled, manpower and time are saved, and the production efficiency of the products is improved.

Description

Technical Field

[0001] The utility model relates to an inertial navigation product, in particular to a fixture for quickly assembling a high-precision six-axis inertial navigation product. Background Technique

[0002] Inertial navigation technology is used to determine the attitude, speed and position parameters of a moving object, and this technology is widely applied in the fields of aerospace, aviation, navigation and geodetic surveying. At present, the MEMS integrated navigation system has been widely recognized in both civilian and military fields. In the civilian aspect, vehicles with navigation and positioning functions, machinery and vehicles for precision agriculture, and unmanned aerial vehicles for pesticide spraying and forest fire prevention have been partially equipped with this type of integrated navigation system; in the military aspect, developed countries in Europe and America have successfully applied it to tactical guided weapons, micro and small unmanned reconnaissance aircraft, satellite detection, spacecraft navigation and other fields.

[0003] Since MEMS sensors are all realized by micro-mechanical structures, and due to their own nature and design principles, they are prone to interference. During long-term movement and work on vehicles or other equipment, as well as during thermal cycling, the inertial navigation product will deform and generate stress. At this time, strict specifications and designs are required for its installation, especially for high-precision inertial navigation products.

[0004] Generally, in terms of structure, MEMS inertial navigation products weld inertial sensors on a whole PCB board, and then use metal parts such as screws, nuts and gaskets to fasten the PCB board on the metal structure. This structure can have good accuracy and reliability during short-term use, but the deformation stress generated during long-term use will reduce the accuracy and reliability of the inertial sensor. In order to reduce the generation of stress, a circuit board is designed and made using a flexible cable, and electronic glue is used to bond the PCB to the metal structural parts to reduce the generation of stress. How to quickly and effectively bond the PCBA with flexible cables to the metal structural parts? The commonly used methods include screwing for fixation, clamping with clips, pressing with heavy objects, etc. When the required size of the inertial navigation product is getting smaller and smaller and the assembly efficiency needs to be improved, such assembly methods are time-consuming, laborious and inefficient. Content of the Utility Model

[0005] To solve the defects of the above-mentioned existing technologies, the utility model provides a fixture for quickly assembling a high-precision six-axis inertial navigation product. The utility model can quickly assemble the inertial navigation product, save manpower and time, and improve the production efficiency of the product.

[0006] To achieve the above technical objectives, the utility model adopts the following technical solutions: a fixture for quickly assembling a high-precision six-axis inertial navigation product, comprising a shell, the shell being a hollow square column structure with one end open, the inner bottom wall of the shell being provided with a positioning groove for positioning the high-precision six-axis inertial navigation product, the side wall of the shell being provided with a fastening bolt group, and also comprising a pressing plate group installed on the high-precision six-axis inertial navigation product, the fastening bolt group and the pressing plate group being both used for clamping the sensor on the high-precision six-axis inertial navigation product.

[0007] The fastening bolt group includes a first fastening bolt, a second fastening bolt, a third fastening bolt, and a fourth fastening bolt. The first fastening bolt is installed on the first side wall of the shell, the second fastening bolt and the third fastening bolt are installed on the second side wall of the shell, and the fourth fastening bolt is installed on the third side wall of the shell.

[0008] A top plate is fixed to the stud surfaces of the first fastening bolt, the second fastening bolt, the third fastening bolt, and the fourth fastening bolt.

[0009] The pressing piece group includes a first pressing piece bolt, a second pressing piece bolt, and a third pressing piece bolt; the nuts of the first pressing piece bolt, the second pressing piece bolt, and the third pressing piece bolt are all fixed with pressing pieces, and the pressing pieces can press the sensor surface.

[0010] The high-precision six-axis inertial navigation product includes a positioning plate and a body. The positioning plate can be positioned in the positioning groove. The body is fixed on the positioning plate. The body is provided with a first bolt hole, a second bolt hole, and a third bolt hole. The first pressing sheet bolt, the second pressing sheet bolt, and the third pressing sheet bolt are respectively installed in the first bolt hole, the second bolt hole, and the third bolt hole.

[0011] In summary, the utility model has achieved the following technical effects:

[0012] The utility model designs a fixture for quickly assembling a high-precision inertial navigation system. The PCB with the sensor is fixed in the product structure by electronic glue using fastening bolts and pressing bolts, thereby avoiding the problem of PCB displacement when using clamps to fasten the PCB, avoiding the problem of a long time required for fastening three surfaces when heavy objects are pressed, and avoiding the problem of being unable to tighten screws due to small structural dimensions. The inertial navigation product can be quickly assembled, saving manpower and time, and improving the production efficiency of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a top view when in use;

[0014] Figure 2 is a schematic diagram of the fixture;

[0015] Figure 3 It is a schematic diagram of a high-precision six-axis inertial navigation product;

[0016] Figure 4 It is a schematic diagram of the usage state. Specific implementation manners

[0017] The following further elaborates on the present utility model in conjunction with the attached drawings.

[0018] This specific embodiment is merely an interpretation of the present utility model and does not limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present utility model, it is protected by the patent law.

[0019] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model.

[0020] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise clearly and specifically defined.

[0021] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0023] Embodiment:

[0024] A fixture for quickly assembling a high-precision six-axis inertial navigation product Figure 1 is a top view in the use state, Figure 2 is a schematic diagram of the fixture, including a housing 1. The housing 1 is a hollow square column structure with one end open. A positioning groove 101 is provided on the inner bottom wall of the housing 1 for positioning the high-precision six-axis inertial navigation product. A set of fastening bolts is installed on the side wall of the housing 1. A set of pressing plates installed on the high-precision six-axis inertial navigation product is also included. Both the set of fastening bolts and the set of pressing plates are used to clamp the sensors on the high-precision six-axis inertial navigation product.

[0025] In the present utility model, the high-precision six-axis inertial navigation product is placed in the positioning groove, and the six sensors are tightened or pressed by using the set of fastening bolts and the set of pressing plates, so as to realize the quick assembly of the high-precision six-axis inertial navigation product.

[0026] The set of fastening bolts includes a first fastening bolt 21, a second fastening bolt 22, a third fastening bolt 23, and a fourth fastening bolt 24. The first fastening bolt 21 is installed on the first side wall of the housing 1. The second fastening bolt 22 and the third fastening bolt 23 are installed on the second side wall of the housing 1. The fourth fastening bolt 24 is installed on the third side wall of the housing 1. Among them, the first side wall, the second side wall, and the third side wall are adjacent side walls.

[0027] A top plate (not shown) is fixed on the stud surfaces of the first fastening bolt 21, the second fastening bolt 22, the third fastening bolt 23, and the fourth fastening bolt 24. The stud surfaces can directly tighten the sensors, or can use the top plate to tighten the sensors after installing the top plate, so as to prevent damage to the sensors.

[0028] Figure 3 is a schematic diagram of the high-precision six-axis inertial navigation product, Figure 4 is a schematic diagram in the use state, combined with Figure 4, the pressing plate group includes a first pressing plate bolt 31, a second pressing plate bolt 32, and a third pressing plate bolt 33; pressing plates (not shown) are fixed at the nuts of the first pressing plate bolt 31, the second pressing plate bolt 32, and the third pressing plate bolt 33, and the pressing plates can press against the surface of the sensor. In the present utility model, the nuts of the first pressing plate bolt 31, the second pressing plate bolt 32, and the third pressing plate bolt 33 can be used as the pressing plates to directly press the sensor, or separate pressing plates can be provided to press the sensor to prevent damage to the sensor.

[0029] Combined with Figure 3 , the high-precision six-axis inertial navigation product includes a positioning plate 41 and a body 42. The positioning plate 41 can be positioned in the positioning groove 101, the body 42 is fixed on the positioning plate 41, and the body 42 is provided with a first bolt hole 43, a second bolt hole 44, and a third bolt hole 45. The first pressing plate bolt 31, the second pressing plate bolt 32, and the third pressing plate bolt 33 are respectively installed in the first bolt hole 43, the second bolt hole 44, and the third bolt hole 45.

[0030] A first gyroscope sensor 5, a second gyroscope sensor 6, and a third gyroscope sensor 9 are installed on the body 42. The first fastening bolt 21 and the second fastening bolt 22 respectively press against the first gyroscope sensor 5 and the second gyroscope sensor 6. The first pressing plate bolt 31 is threadedly connected in the first bolt hole 43 to press against the third gyroscope sensor 9.

[0031] A first acceleration sensor 7, a second acceleration sensor 8, and a third acceleration sensor 10 are installed on the body 42. The third fastening bolt 23 and the fourth fastening bolt 24 respectively press against the first acceleration sensor 7 and the second acceleration sensor 8. The third pressing plate bolt 33 is threadedly connected in the third bolt hole 45 to press against the third acceleration sensor 10.

[0032] A microprocessing unit 11 is installed on the body 42. The second pressing plate bolt 32 is threadedly connected in the second bolt hole 44 to press against the microprocessing unit 11, the third gyroscope sensor 9, and the third acceleration sensor 10.

[0033] The installation method of the three gyroscope sensors, the three acceleration sensors, and one microprocessing unit is to bond them to the body with electronic glue.

[0034] After bonding the PCBA with a flexible printed circuit board to the product structure using electronic glue, the high-precision inertial navigation product is placed into the fixture positioning groove. Four fastening bolts are screwed to press against the rigid PCB containing the accelerometer and gyroscope. Then, three pressing bolts are used to tightly press and fix the two acceleration plates and gyro plates on the upper surface. After the electronic glue is completely cured, the three pressing bolts on the upper surface are removed, and the four fastening bolts on the side are loosened. The cured inertial navigation product is taken out from the positioning groove of the assembly fixture, quickly completing the assembly steps of the flexible printed circuit board.

[0035] The above description is only a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. A fixture for quickly assembling high-precision six-axis inertial navigation products, characterized by: The invention comprises a shell (1), wherein the shell (1) is a hollow square column structure with one end open, the inner bottom wall of the shell (1) is provided with a positioning groove (101) for positioning a high-precision six-axis inertial navigation product, the side wall of the shell (1) is provided with a fastening bolt group, and also comprises a pressing plate group installed on the high-precision six-axis inertial navigation product, wherein the fastening bolt group and the pressing plate group are both used for clamping a sensor on the high-precision six-axis inertial navigation product.

2. According to claim 1, a fixture for quickly assembling a high-precision six-axis inertial navigation product is characterized in that: The fastening bolt group comprises a first fastening bolt (21), a second fastening bolt (22), a third fastening bolt (23), and a fourth fastening bolt (24); the first fastening bolt (21) is installed on a first side wall of the shell (1); the second fastening bolt (22) and the third fastening bolt (23) are installed on a second side wall of the shell (1); and the fourth fastening bolt (24) is installed on a third side wall of the shell (1).

3. A fixture for quickly assembling a high-precision six-axis inertial navigation product according to claim 2, characterized in that: The stud surfaces of the first fastening bolt (21), the second fastening bolt (22), the third fastening bolt (23) and the fourth fastening bolt (24) are all fixed with a top plate.

4. The fixture for quickly assembling a high-precision six-axis inertial navigation product according to claim 1, characterized in that: The pressing sheet group comprises a first pressing sheet bolt (31), a second pressing sheet bolt (32), and a third pressing sheet bolt (33); the nuts of the first pressing sheet bolt (31), the second pressing sheet bolt (32), and the third pressing sheet bolt (33) are all fixed with pressing sheets, and the pressing sheets can press the surface of the sensor.

5. The fixture for quickly assembling a high-precision six-axis inertial navigation product according to claim 4, characterized in that: The high-precision six-axis inertial navigation product comprises a positioning plate (41) and a body (42); the positioning plate (41) can be positioned in the positioning groove (101); the body (42) is fixed on the positioning plate (41); the body (42) is provided with a first bolt hole (43), a second bolt hole (44), and a third bolt hole (45); the first pressing sheet bolt (31), the second pressing sheet bolt (32), and the third pressing sheet bolt (33) are respectively installed in the first bolt hole (43), the second bolt hole (44), and the third bolt hole (45).

Images