Three-coordinate detection clamp

Abstract

The three-coordinate detection clamp comprises a detection table, the upper end face of the detection table is provided with a mounting plate, one end of the mounting plate is provided with a first connecting seat and a second connecting seat which are arranged in parallel from outside to inside, and a clamping assembly used for placing and fixing a workpiece to be detected is hinged to the second connecting seat. A pull rod assembly used for fixing the clamping assembly is arranged on the first connecting base, and a supporting column matched with the clamping assembly is arranged in the middle of the mounting plate. The workpiece can be fixed through the clamping assembly, the stability of the workpiece during measurement of the three-coordinate measuring instrument is guaranteed, deviation of the workpiece is avoided, the measurement accuracy is improved, meanwhile, the clamping assembly can rotate, the workpiece can be in two to-be-measured states, various data of the upper end face and the side face of the workpiece can be measured, and data measurement of the workpiece is more comprehensive.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts detection equipment, in particular to a three-coordinate detection fixture. Background Art

[0002] In the field of automobile parts manufacturing, three-coordinate measuring machines are usually used to conduct random inspections on parts in batches. The detector of the three-coordinate measuring machine can move on three mutually perpendicular guide rails. The detector transmits signals in contact or non-contact manner. The displacement measurement system of the three axes (such as grating ruler) calculates the points (x, y, z) and various functions of the workpiece through a data processor or computer, and is used to measure the various accuracies of automobile parts, such as dimensional accuracy, positioning accuracy, geometric accuracy and contour accuracy, etc., to detect whether the automobile parts meet the factory requirements; for example, it is used in the production of automobile engine cylinder head bodies. Three-coordinate detector, such as patent CN220104042U discloses a three-coordinate measuring device, including a measuring device body, a support structure is arranged near the four corners of the lower surface of the measuring device body, a workbench is fixedly installed on the upper surface of the measuring device body, a slide rail is fixedly installed on the other end surface of the workbench, a gantry is slidably installed on the slide rail, a step slide frame is slidably installed on the gantry, a cover is fixedly installed on the upper surface of the step slide frame, a guide rail is fixedly installed on the lower surface of the step slide frame, a measuring head is slidably installed on the guide rail, and a conveying structure is arranged on the upper surface of the measuring device body. During the detection, the above patent directly places the workpiece to be measured on the placement plate for three-coordinate measurement. During the measurement process, the workpiece lacks fixed support and is prone to offset, which affects the measurement effect. Utility Model Content

[0003] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a three-coordinate detection fixture, including a detection table, the upper end surface of the detection table is provided with a mounting plate, one end of the mounting plate is provided with a first connecting seat and a second connecting seat in parallel from the outside to the inside, the second connecting seat is hinged with a clamping assembly for placing and fixing the workpiece to be measured, the first connecting seat is provided with a pull rod assembly for fixing the clamping assembly, and the middle part of the mounting plate is provided with a support column adapted to the clamping assembly.

[0004] Furthermore, the clamping assembly includes a U-shaped placement block adapted to the shape of the workpiece to be measured, and the U-shaped bottom surface of the U-shaped placement block is provided with a connecting block. Both ends of the connecting block are provided with connecting shafts, and the connecting shaft is rotatably connected to the second connecting seat through a bearing.

[0005] Furthermore, the clamping assembly also includes a positioning column, two of which are symmetrically arranged on the left and right sides of the upper end surface of the U-shaped placing block, and the left and right sides of the upper end surface of the U-shaped placing block are also respectively provided with wrench assemblies corresponding to the positioning columns. The wrench assembly includes a base, a handle rod, a connecting rod, and a pressure rod. The base is fixedly installed on the upper end surface of the U-shaped placing block, the middle part of the handle rod is hinged to the base, one end of the handle rod is hinged to one end of the connecting rod, and the middle part of the connecting rod is hinged to the base, the other end of the connecting rod is fixedly connected to one end of the pressure rod by bolt connection, and the other end of the pressure rod is provided with a positioning hole adapted to the positioning column.

[0006] Furthermore, the pull rod assembly includes a threaded rod, the outer wall of which is provided with an external thread, the upper part of the first connecting seat and the upper part of the connecting block are both provided with threaded holes, the threaded holes are provided with internal threads matching the threaded rod, and when the U-shaped placing block is rotated to be parallel to the first connecting seat, the two threaded holes are coaxial.

[0007] Compared with the prior art, the advantages of the utility model are:

[0008] The clamping assembly can be used to fix the workpiece, ensuring the stability of the workpiece when the three-dimensional coordinate measuring machine is measuring, avoiding the deviation of the workpiece and improving the measurement accuracy. At the same time, the clamping assembly can rotate so that the workpiece can be in two test states, and various data on the end face and side of the workpiece can be measured, making the data measurement of the workpiece more comprehensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0010] Figure 2 The structure of the utility model is shown in FIG. Figure 2 ;

[0011] Figure 3 It is a structural schematic diagram of the wrench assembly.

[0012] In the figure: 1. test table; 2. mounting plate; 3. first connecting seat; 4. second connecting seat; 5. supporting column; 6. U-shaped placement block; 7. connecting block; 8. connecting shaft; 9. positioning column; 10. base; 11. handle rod; 12. connecting rod; 13. pressure rod; 14. positioning hole; 15. threaded rod. DETAILED DESCRIPTION

[0013] The utility model will be further described below.

[0014] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0015] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0016] See also Figure 1-3

[0017] A three-coordinate detection fixture comprises a detection table 1, which is placed directly below the probe of an existing three-coordinate detector. The upper end surface of the detection table 1 is provided with a mounting plate 2, and one end of the mounting plate 2 is provided with a first connecting seat 3 and a second connecting seat 4 in parallel from the outside to the inside. The first connecting seat 3 and the second connecting seat 4 are vertically mounted on the mounting plate, and the opposite end surfaces of the first connecting seat 3 and the second connecting seat 4 are in contact with each other. A U-shaped notch is provided on the upper part of the second connecting seat 4, and a clamping component for placing and fixing a workpiece to be measured is hinged in the U-shaped notch. When the clamping component is rotated, the workpiece has two states to be measured, wherein the first state to be measured is that the upper end surface of the workpiece is in contact with the mounting plate. The state in which the mounting plate 2 is parallel is used to measure various precision data of the upper end face of the workpiece; the second state to be measured is the state in which the upper end face of the workpiece is perpendicular to the mounting plate 2, and this state is used to measure various precision data of the side face of the workpiece; the first connecting seat 4 is provided with a pull rod assembly for fixing the clamping assembly, and the pull rod assembly can ensure the stability of the workpiece in the second state to be measured and prevent the clamping assembly from rotating; the middle part of the mounting plate 2 is provided with a support column 5 adapted to the clamping assembly, and the support column 5 is located below the clamping assembly, and when the clamping assembly is in the first state to be measured, the support column 5 provides support for the clamping assembly to ensure the stability of the clamping assembly and its workpiece.

[0018] The clamping assembly includes a U-shaped placement block 6 adapted to the shape of the workpiece to be measured, and a connecting block 7 is provided on the U-shaped bottom surface of the U-shaped placement block 6. Both ends of the connecting block 7 are provided with a connecting shaft 8, and the connecting shaft 8 is rotatably connected to the second connecting seat 4 through a bearing; specifically, Figure 1As shown, the length of the connecting block 7 is adapted to the U-shaped notch on the second connecting seat 4, and the bearings are embedded on the left and right sides of the U-shaped notch. The connecting shafts 8 on the left and right sides of the connecting block 7 are respectively connected to the corresponding bearings to facilitate the rotation of the U-shaped placement block 6, so that the workpiece can be switched between the two test states.

[0019] The clamping assembly further includes a positioning column 9, wherein two positioning columns 9 are symmetrically arranged on the left and right sides of the upper end surface of the U-shaped placement block 6. Specifically, Figure 1 and Figure 3 As shown, the upper end of the workpiece is provided with a convex edge, and a plurality of processing holes are opened on the convex edge. The upper diameter of the positioning column 9 is adapted to the diameter of the processing hole, and the diameter of the lower part of the positioning column 9 is larger than the diameter of the upper part. That is to say, when the upper part of the positioning column 9 is inserted into the processing hole, the lower end surface of the convex edge can be tightly attached to the junction surface between the upper and lower parts of the positioning column 9 for placing the workpiece.

[0020] The left and right sides of the upper end surface of the U-shaped placement block 6 are also provided with wrench components corresponding to the positioning columns 9, respectively. The wrench components are used to press down the workpiece and press the workpiece tightly between the positioning columns 9 and the wrench components. Specifically, Figure 3 As shown, the wrench assembly includes a base 10, a handle bar 11, a connecting rod 12, and a pressure rod 13. The base 10 is fixedly mounted on the upper end surface of the U-shaped placement block 6. The middle part of the handle bar 11 is hinged to the base 10, one end of the handle bar 11 is hinged to one end of the connecting rod 12, and the middle part of the connecting rod 12 is hinged to the base 10. The other end of the connecting rod 12 is fixedly connected to one end of the pressure rod 13 by bolt connection. The other end of the pressure rod 13 is provided with a positioning hole 14 adapted to the upper part of the positioning column 9. Figure 3 As shown, the base 10, the handle rod 11, and the connecting rod 12 form a double rocker mechanism, which is similar to the existing quick clamp structure. When the handle rod 11 is pulled upward, the handle rod 11 rotates around the hinge point with the base, and the end of the handle rod 11 connected to the connecting rod 12 rotates downward, which can drive the connecting rod 12 to rotate around the base 10 and make the end of the connecting rod 12 connected to the pressure rod 13 move upward. At this time, the positioning column 9 is not inserted into the positioning hole 14 to facilitate the removal of the workpiece; when the workpiece needs to be fixed, the handle rod 11 is pulled downward, the connecting rod 12 and the pressure rod 13 rotate in opposite directions, and the positioning hole 14 on the pressure rod 13 is covered onto the upper part of the positioning column 9 to achieve the clamping of the workpiece.

[0021] The pull rod assembly includes a threaded rod 15, the outer wall of which is provided with an external thread. The upper part of the first connecting seat 3 and the upper part of the connecting block 7 are both provided with threaded holes, and the threaded holes are provided with internal threads that are compatible with the threaded rod 15. When the U-shaped placement block 6 is rotated to be parallel to the first connecting seat 3, the two threaded holes are coaxial. At this time, the threaded rod 15 can be screwed into the threaded hole on the connecting block 7, thereby achieving the fixation of the position of the U-shaped placement block 6.

[0022] Specific examples are used in this article to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method of the utility model and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scope. Changes and improvements to the utility model will be possible without exceeding the concept and scope specified in the attached claims. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A three-coordinate detection fixture, characterized in that: The invention comprises a testing platform (1), wherein the upper end surface of the testing platform (1) is provided with a mounting plate (2), one end of the mounting plate (2) is provided with a first connecting seat (3) and a second connecting seat (4) arranged in parallel from the outside to the inside, the second connecting seat (4) is hinged with a clamping assembly for placing and fixing a workpiece to be tested, the first connecting seat (3) is provided with a pull rod assembly for fixing the clamping assembly, and the middle part of the mounting plate (2) is provided with a support column (5) adapted to the clamping assembly.

2. The three-coordinate detection fixture according to claim 1, characterized in that: The clamping assembly comprises a U-shaped placement block (6) adapted to the shape of the workpiece to be measured, a connecting block (7) is provided on the U-shaped bottom surface of the U-shaped placement block (6), connecting shafts (8) are provided at both ends of the connecting block (7), and the connecting shafts (8) are rotatably connected to the second connecting seat (4) via bearings.

3. The three-coordinate detection fixture according to claim 2, characterized in that: The clamping assembly also includes a positioning column (9), wherein two positioning columns (9) are provided and symmetrically arranged on the left and right sides of the upper end surface of the U-shaped placement block (6), and the left and right sides of the upper end surface of the U-shaped placement block (6) are also provided with wrench assemblies corresponding to the positioning columns (9), respectively. The wrench assembly includes a base (10), a handle rod (11), a connecting rod (12), and a pressure rod (13). The base (10) is fixedly installed on the upper end surface of the U-shaped placement block (6), the middle part of the handle rod (11) is hinged to the base (10), one end of the handle rod (11) is hinged to one end of the connecting rod (12), and the middle part of the connecting rod (12) is hinged to the base (10), the other end of the connecting rod (12) is fixedly connected to one end of the pressure rod (13) by bolt connection, and the other end of the pressure rod (13) is provided with a positioning hole (14) adapted to the positioning column (9).

4. The three-coordinate detection fixture according to claim 2, characterized in that: The pull rod assembly comprises a threaded rod (15), the outer wall of which is provided with an external thread, the upper part of the first connecting seat (3) and the upper part of the connecting block (7) are provided with threaded holes, and the threaded holes are provided with internal threads that are compatible with the threaded rod (15), and when the U-shaped placement block (6) is rotated to be parallel to the first connecting seat (3), the two threaded holes are coaxial.

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