Calibration clamp

Abstract

The utility model provides a calibration clamp, and relates to the technical field of sensor calibration clamps, the calibration clamp comprises a support body, a first side surface of the support body forms a through groove with an inclined top wall, and the vertical bottom of the through groove forms a first through hole; the top face of the pressing block is a guide inclined face matched with the inclined top wall of the through groove, a threaded through hole is formed in the side face, making contact with the vertical bottom of the through groove, of the pressing block, and a mounting groove is formed above the threaded through hole of the pressing block; the clamp platform is arranged between the pressing block and the bottom wall of the through groove; the second end of the bolt penetrates through the first through hole and is in threaded connection with the pressing block through the threaded through hole, and a movable gap is formed between the bolt and the first through hole; and one end of the torsional spring is fixedly connected with the mounting hole, and the other end of the torsional spring is fixedly connected with the mounting groove, so that when the pressing block moves in the axial direction of the bolt, the torsional spring is used for providing upward pulling force for the pressing block. By means of the clamp platform, the clamp platform can be rapidly mounted and dismounted.

Description

Technical Field

[0001] This utility model relates to the technical field of calibration fixtures, and in particular to a calibration fixture. Background Technology

[0002] IMU (Inertial Measurement Unit) calibration is crucial for improving sensor performance, aiming to reduce errors and enhance measurement accuracy and reliability. Before calibration, the IMU must be securely mounted on a specially designed calibration fixture. Traditional calibration fixtures rely on four level posts for support and are secured with four screws. However, the process of installing and removing each screw is quite cumbersome and adds unnecessary time consumption. Utility Model Content

[0003] In view of this, this application provides a calibration fixture designed to enable rapid installation and removal of the fixture platform.

[0004] The calibration fixture provided in this application includes: a support body, wherein a first side of the support body forms a through groove with an inclined top wall, a first through hole is formed at the vertical bottom of the through groove, and a mounting hole is formed on a second side of the support body adjacent to the first side; a pressure block, wherein the top surface of the pressure block is a guide slope that matches the inclined top wall of the through groove, a threaded through hole is formed on the side of the pressure block that contacts the vertical bottom of the through groove, and a mounting groove is formed above the threaded through hole of the pressure block; a fixture platform, wherein the fixture platform is disposed between the pressure block and the bottom wall of the through groove; a bolt, wherein the bolt has a first end and a second end disposed opposite to each other, the second end of the bolt passes through the first through hole and is threadedly connected to the pressure block through the threaded through hole, and a movable gap is formed between the bolt and the first through hole; and a torsion spring, wherein one end of the torsion spring is fixedly connected to the mounting hole, and the other end of the torsion spring is fixedly connected to the mounting groove, so that when the pressure block moves along the axial direction of the bolt, the torsion spring provides an upward pulling force to the pressure block.

[0005] Preferably, the inclined top wall of the through groove is inclined upward along the direction from the first end to the second end of the bolt.

[0006] Preferably, the support body has two opposing second sides, the mounting holes include two, the two mounting holes are respectively disposed on the two second sides of the support body, the torsion springs include two, and the two ends of each torsion spring are respectively fixedly connected to the corresponding mounting hole and mounting groove.

[0007] Preferably, the calibration fixture further includes a spring, which is sleeved on the bolt and abuts against the support body and the pressure block, for applying a pushing force to the pressure block.

[0008] Preferably, the calibration fixture further includes a bolt washer, which is sleeved on the bolt and positioned between the nut of the bolt and the support body.

[0009] Preferably, the calibration fixture further includes an anti-detachment component disposed at the second end of the bolt to prevent the pressure block from falling off the bolt.

[0010] Preferably, the anti-detachment component includes: a pressure block washer, which is sleeved on the second end of the bolt, and the area of ​​the pressure block washer is larger than the opening area of ​​the threaded through hole, so as to prevent the pressure block from falling off the bolt.

[0011] Preferably, the anti-detachment component further includes: an anti-detachment screw disposed at the second end of the bolt, which fixes the pressure block washer at the second end of the bolt.

[0012] Preferably, the calibration fixture further includes a pressure bar disposed at the bottom of the fixture platform where it contacts the through groove.

[0013] Preferably, the pressure bar is made of a high-hardness material to reduce wear on the clamping platform.

[0014] This application provides a calibration fixture, relating to the technical field of sensor calibration fixtures. The calibration fixture includes: a support body, a first side surface of which forms a through groove with an inclined top wall, a first through hole formed at the vertical bottom of the through groove, and a mounting hole formed on a second side surface of the support body adjacent to the first side surface; and a pressure block, the top surface of which is a guide slope that matches the inclined top wall of the through groove, a threaded through hole formed on the side surface of the pressure block that contacts the vertical bottom of the through groove, and a mounting groove formed above the threaded through hole of the pressure block. A clamping platform is disposed between the pressure block and the bottom wall of the through groove; a bolt has a first end and a second end disposed opposite to each other, the second end of the bolt passing through the first through hole and threadedly connected to the pressure block through the threaded through hole, with a movable clearance formed between the bolt and the first through hole; a torsion spring has one end fixedly connected to the mounting hole and the other end fixedly connected to the mounting groove, so that when the pressure block moves axially along the bolt, the torsion spring provides an upward pulling force to the pressure block. This application enables rapid installation and disassembly of the clamping platform.

[0015] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This paper shows one of the structural schematic diagrams of the calibration fixture provided in the embodiments of this application;

[0018] Figure 2 A second schematic diagram of the calibration fixture provided in the embodiments of this application is shown;

[0019] Figure 3 The third schematic diagram of the calibration fixture provided in the embodiments of this application is shown.

[0020] Reference numerals in the attached drawings: 1-Support body; 2-Clamping platform; 3-Pressure bar; 4-Pressure block; 5-Torsion spring; 6-Spring; 7-Bolt; 8-Bolt washer; 9-Anti-loosening screw; 10-Pressure block washer. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] IMU (Inertial Measurement Unit) calibration is a crucial process aimed at optimizing the performance of IMU sensors. It effectively reduces errors and deviations through calibration, thereby significantly improving the accuracy and reliability of measurements. Before calibration, the first step is to securely place the IMU product to be calibrated on a specially designed calibration fixture platform, and then ensure the fixture platform is firmly installed. After the calibration process is completed, the fixture platform must be carefully disassembled in order to safely remove the calibrated IMU product.

[0026] However, traditional calibration fixture platforms often rely on four equal-height columns as a support structure and require four screws for fixation. Although this installation method is effective, the process of installing and removing the screws one by one is quite cumbersome and increases unnecessary time consumption.

[0027] like Figures 1-3 As shown, this application provides a calibration fixture, including a support body 1, a fixture platform 2, a pressure block 4, a bolt 7, and a torsion spring 5.

[0028] The support body 1 is a cuboid column with two opposing first sides and two opposing second sides, the first and second sides being adjacent to each other. One of the first sides of the support body 1 is recessed inward to form a through groove with an inclined top wall, and the through groove extends through the two opposing second sides. The vertical bottom of the through groove forms a first through hole that extends through the other first side. The second side of the support body 1 adjacent to the first side has a mounting hole.

[0029] The top surface of the pressure block 4 is a guide slope that matches the inclined top wall of the through groove. The side of the pressure block 4 that contacts the vertical bottom of the through groove forms a threaded through hole. An installation groove is formed above the threaded through hole of the pressure block 4.

[0030] The clamping platform 2 is set between the pressure block 4 and the bottom wall of the through groove of the support body 1.

[0031] Bolt 7 has a first end and a second end that are arranged opposite to each other. The second end of bolt 7 passes through the first through hole and is threadedly connected to pressure block 4 through the threaded through hole. A radial clearance is formed between bolt 7 and the first through hole, so that bolt 7 can move freely within the first through hole.

[0032] One end of the torsion spring 5 is fixedly connected to the mounting hole, and the other end of the torsion spring 5 is fixedly connected to the mounting groove, so that when the pressure block 4 moves along the axial direction of the bolt 7, the torsion spring 5 is in a stretched state, and the torsion spring 5 is used to provide an upward pulling force to the pressure block 4.

[0033] The inclined top wall of the through slot slopes upwards along the direction from the first end to the second end of the bolt 7. When it is necessary to place or remove the clamping platform 2, the bolt 7 can be rotated in the first direction. Due to the radial clearance between the bolt 7 and the first through hole, and the matching design of the guide slope of the pressure block 4 and the inclined top wall of the support body 1, the torsion spring 5 provides an upward pulling force to the pressure block 4. Rotating the bolt 7 will cause the pressure block 4 to move outwards along the inclined top wall. In this way, a space is formed between the bottom of the pressure block 4 and the bottom of the through slot of the support body 1. This space is used to place or remove the clamping platform 2.

[0034] Once the clamping platform 2 is in place, the clamping platform 2 can be clamped by rotating the bolt 7 in the second direction. At this time, the pressure block 4 will move inward along the inclined top wall until the clamping platform 2 is tightly clamped. This clamping method is both stable and reliable, ensuring that the clamping platform 2 will not move or shake during use.

[0035] Furthermore, there are two mounting holes and two mounting slots, and two torsion springs 5. The two ends of each torsion spring 5 are fixedly connected to the corresponding mounting holes and mounting slots to ensure the smooth movement of the pressure block 4 and the stable clamping of the clamping platform 2.

[0036] Furthermore, such as Figures 1-3 As shown in the embodiment of this application, a calibration fixture also includes a spring 6, a bolt washer 8, an anti-loosening component, and a pressure strip 3.

[0037] Spring 6 is sleeved on bolt 7 and abuts between support 1 and pressure block 4, and is used to apply thrust to pressure block 4.

[0038] One end of the torsion spring 5 is fixedly connected to the mounting hole of the support body 1, and the other end is fixedly connected to the mounting groove of the pressure block 4, providing an upward pulling force to the pressure block 4. The spring 6 abuts between the support body 1 and the pressure block 4, providing an outward pushing force to the pressure block 4. This design allows the threaded connection between the bolt 7 and the pressure block 4 to be released after rotating the bolt 7 in the first direction. The pressure block 4 moves outward under the pushing force of the spring 6, and because the torsion spring 5 is in a stretched state, it can drive the pressure block 4 to move outward along the inclined top wall, thereby achieving a rapid loosening effect. When rotating the bolt 7 in the second direction, the bolt 7 and the pressure block 4 are threadedly connected, and further rotation of the bolt 7 causes the bolt 7 to drive the pressure block 4 to move inward along the axial direction of the bolt 7.

[0039] Bolt washer 8 is fitted onto bolt 7 and positioned between the nut of bolt 7 and support body 1.

[0040] The anti-detachment assembly includes a pressure block washer 10 and an anti-detachment screw 9. The pressure block washer 10 is sleeved and fixed to the second end of the bolt 7 to prevent the pressure block 4 from falling off the bolt 7. The anti-detachment screw 9 is located at the second end of the bolt 7 to fix the pressure block washer 10 to the second end of the bolt 7.

[0041] The pressure strip 3 is set at the bottom of the clamping platform 2 and corresponds to the bottom wall of the through groove of the support body 1. It is made of a material with high hardness, which effectively increases the wear resistance of the clamping platform 2 and extends the service life of the clamp.

[0042] This application provides a calibration fixture characterized by its speed, featuring a modular design that enables prefabrication and efficient assembly of components. Compared to traditional methods, this fixture offers significantly faster installation, greatly reducing installation time. Disassembly is equally simple and quick, significantly improving overall work efficiency. Furthermore, it can flexibly adapt to the diverse needs of different calibration projects. Users simply select a suitable fixture platform based on actual requirements, easily insert it under the clamping block, and complete the installation by clamping it in place. This design eliminates the need to consider the size limitations of the fixture platform or to set up complex mating structures on the platform, thereby greatly improving the reusability and versatility of the fixture and effectively reducing the cost of calibration.

[0043] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A calibration fixture, characterized in that, The calibration fixture includes: A support body, wherein a first side of the support body forms a through groove with an inclined top wall, a first through hole is formed at the vertical bottom of the through groove, and a mounting hole is formed on a second side of the support body adjacent to the first side. The pressure block has a top surface that matches the inclined top wall of the through groove, a threaded through hole is formed on the side of the pressure block that contacts the vertical bottom of the through groove, and an installation groove is formed above the threaded through hole of the pressure block. A clamping platform is disposed between the pressure block and the bottom wall of the through groove; A bolt having a first end and a second end disposed opposite to each other, the second end of the bolt passing through the first through hole and being threadedly connected to the pressure block through the threaded through hole, and a movable gap being formed between the bolt and the first through hole; A torsion spring, one end of which is fixedly connected to the mounting hole and the other end of which is fixedly connected to the mounting groove, so that when the pressure block moves along the axial direction of the bolt, the torsion spring provides an upward pulling force to the pressure block.

2. The calibration fixture according to claim 1, characterized in that, The inclined top wall of the through groove slopes upward along the direction from the first end to the second end of the bolt.

3. The calibration fixture according to claim 1, characterized in that, The support has two opposing second sides, and the mounting holes include two holes respectively located on the two second sides of the support. The torsion springs include two holes, and the two ends of each torsion spring are fixedly connected to the corresponding mounting hole and mounting groove respectively.

4. The calibration fixture according to claim 1, characterized in that, The calibration fixture also includes: A spring, which is sleeved on the bolt and abuts between the support and the pressure block, is used to apply a thrust to the pressure block.

5. The calibration fixture according to claim 1, characterized in that, The calibration fixture also includes: A bolt washer is fitted onto the bolt and positioned between the bolt nut and the support body.

6. The calibration fixture according to claim 1, characterized in that, The calibration fixture also includes: An anti-detachment component is provided at the second end of the bolt to prevent the pressure block from falling off the bolt.

7. The calibration fixture according to claim 6, characterized in that, The anti-detachment component includes: A pressure block washer is fitted onto the second end of the bolt, and the area of ​​the pressure block washer is larger than the opening area of ​​the threaded through hole, in order to prevent the pressure block from falling off the bolt.

8. The calibration fixture according to claim 7, characterized in that, The anti-detachment component also includes: An anti-loosening screw is provided at the second end of the bolt, and the pressure block washer is fixed at the second end of the bolt.

9. The calibration fixture according to claim 1, characterized in that, The calibration fixture also includes: A pressure strip is provided at the bottom of the fixture platform that contacts the through groove.

10. The calibration fixture according to claim 9, characterized in that, The pressure bar is made of a high-hardness material to reduce wear on the clamping platform.

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