Three-coordinate auxiliary clamp
By using a magnetic repulsive force to drive the upper and lower pressure rod structure and rubber contact, the problem of damage to the surface of the workpiece in existing coordinate measuring machine (CMM) auxiliary fixtures is solved, and flexible positioning and multi-size adaptation are achieved, thus expanding the application range.
Patent Information
- Application Number
- CN202520363315.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-03-04
AI Technical Summary
Existing coordinate measuring machine (CMM) auxiliary fixtures are prone to damaging the surface of the workpiece when positioning it, especially plastic parts.
It adopts an upper and lower pressure rod structure, uses magnetic repulsion for positioning, and combines a rubber indenter to contact the test piece. The fixing force is adjusted by adjusting the distance between the upper and lower pressure rods to avoid direct contact damage, and the copper base reduces the influence of magnetic attraction.
It achieves positioning accuracy while preventing damage to the surface of the workpiece under test, is applicable to workpieces of various sizes, expands the application range of the fixture, and is simple and efficient to operate.
Smart Images
Figure CN223777013U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of fixture, specifically refers to a three coordinate auxiliary fixture. BACKGROUND
[0002] Three coordinate measuring instrument is a kind of precision instrument for measuring the shape profile of object, and its working process and principle are as follows: the object to be measured is placed on the workbench, and the contact probe can move in three-dimensional coordinate system, the probe head of probe is contacted with any point on the surface of object, and then the coordinates (X, Y, Z) of probe are recorded once, after the probe head completes measurement on the surface of object, a series of coordinate values can be obtained, and by calculating these coordinate values, various values to be measured related to object, such as dimensional accuracy, positioning accuracy, geometric accuracy and profile accuracy, etc.
[0003] When three coordinate measuring instrument measures product to be measured, auxiliary fixture is needed to position the product to be measured, and currently, such auxiliary fixture positions by the way that rigid member directly presses on the product to be measured, especially for the product to be measured of plastic, which is easy to damage the surface of product to be measured. CONTENT OF THE UTILITY MODEL
[0004] In view of the deficiency of prior art, the utility model aims at providing a three coordinate auxiliary fixture to solve the technical problem that the three coordinate auxiliary fixture in prior art is easy to damage the surface of product to be measured.
[0005] To solve the above technical problem, the utility model provides a three coordinate auxiliary fixture, which comprises upper pressing rod, lower pressing rod and base, the base is provided with fixing structure for fixing to detection table surface, the upper pressing rod and the lower pressing rod are both vertically slidingly connected on the base, and the upper pressing rod is above the lower pressing rod, the upper pressing rod is provided with first magnet, the lower pressing rod is provided with second magnet, the first magnet and the second magnet repel each other to drive the lower pressing rod to move downward, and the upper pressing rod is provided with fixing member for fixing the upper pressing rod and the base.
[0006] After adopting the above structure, the three coordinate auxiliary fixture of the utility model has the following advantages: the lower pressing rod is used for positioning the product to be measured, the first magnet on the upper pressing rod exerts downward repulsive force on the second magnet on the lower pressing rod, so that the lower pressing rod presses on the product to be measured, the fixing force of the lower pressing rod on the product to be measured can be adjusted by adjusting the distance between the upper pressing rod and the lower pressing rod, the positioning of the product to be measured is ensured on the premise of preventing the surface of the product to be measured from being damaged, the upper pressing rod can be fixed at any height of the base through the fixing member, stepless adjustment is realized, it is suitable for various sizes of measured objects, and the application range of three coordinate auxiliary fixture is expanded.
[0007] As improvement, the base comprises a fixed rod and a sleeve with an open upper end, the fixed rod is vertically arranged in the sleeve, the sleeve is provided with a through slot which extends downward and penetrates the lateral wall of the sleeve, the upper pressing rod and the lower pressing rod are both slidingly connected to the fixed rod and extend out through the through slot; by adopting the structure, the open upper end of the sleeve and the through slot facilitate the installation of the upper pressing rod and the lower pressing rod.
[0008] As improvement, the fixing member is a pressing buckle arranged on the upper pressing rod, the upper pressing rod is fixed to the base by rotating the pressing buckle; by adopting the structure, the upper pressing rod is fixed to the base, and the structure is simple and the operation is convenient.
[0009] As improvement, the sleeve is threadedly connected with a pressing nut at the upper end; by adopting the structure, the upper pressing rod and the lower pressing rod are prevented from being pulled out from the upper end of the sleeve.
[0010] As improvement, the first magnet and the second magnet are both slidingly connected to the fixed rod; by adopting the structure, the first magnet and the second magnet are correspondingly arranged in upper and lower positions, and the repulsion between the first magnet and the second magnet ensures that the lower pressing rod positions the measured member.
[0011] As improvement, the fixed rod is sleeved with a spring, and the spring is arranged between the lower pressing rod and the sleeve; by adopting the structure, the spring enables the lower pressing rod to be automatically reset upward.
[0012] As improvement, the fixed rod and the sleeve are made of copper; by adopting the structure, the first magnet and the second magnet are prevented from generating attraction to the fixed rod and the sleeve and affecting the positioning of the lower pressing rod to the measured member.
[0013] As improvement, the fixing structure is a threaded stud arranged at the bottom end of the base; by adopting the structure, the threaded stud is simple in structure and convenient to connect.
[0014] As improvement, the lower pressing rod is connected with a rubber pressing head at one end; by adopting the structure, the rubber pressing head is in contact with the measured member, and the surface of the measured member is further prevented from being damaged. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a sectional view of the utility model.
[0016] Figure 2 It is a plan view of the upper pressing rod in the utility model.
[0017] Figure 3 It is a plan view of the lower pressing rod in the utility model.
[0018] Figure 4 It is a plan view of the base in the utility model.
[0019] Reference numerals: 1. Upper pressure rod; 2. Lower pressure rod; 3. Base; 31. Fixing rod; 32. Sleeve; 4. First magnet; 5. Second magnet; 6. Through groove; 7. Clamp; 8. Pressure nut; 9. Spring; 10. Stud; 11. Rubber pressure head. Detailed Implementation
[0020] The following is a detailed description of a three-coordinate auxiliary fixture according to the present invention, with reference to the accompanying drawings.
[0021] like Figures 1 to 4 As shown, a three-coordinate auxiliary fixture includes an upper pressure rod 1, a lower pressure rod 2, and a base 3. The base 3 is provided with a fixing structure for fixing to the detection table. The upper pressure rod 1 and the lower pressure rod 2 are both slidably connected to the base 3 vertically, with the upper pressure rod 1 located above the lower pressure rod 2. The upper pressure rod 1 is provided with a first magnet 4, and the lower pressure rod 2 is provided with a second magnet 5. The first magnet 4 and the second magnet 5 have the same magnetic poles but repel each other, which can drive the lower pressure rod 2 to move downward. The upper pressure rod 1 is provided with a fixing member for fixing the upper pressure rod 1 to the base 3.
[0022] like Figure 1 As shown, the base 3 includes a fixing rod 31 and a sleeve 32 with an open upper end. The fixing rod 31 is vertically installed inside the sleeve 32. The upper end of the sleeve 32 is provided with a through groove 6, which extends downward and penetrates the side wall of the sleeve 32. Specifically, as shown... Figure 1 and Figure 4 As shown, there are two through slots 6, one on the left and one on the right. Both through slots 6 penetrate the inner and outer walls of the sleeve 32. The upper pressure rod 1 and the lower pressure rod 2 are slidably connected to the fixed rod 31 and extend out through the through slots 6. Figure 1 As shown, the upper pressure rod 1 and the lower pressure rod 2 extend out through the through slots 6 on both sides.
[0023] like Figure 1 As shown, the first magnet 4 and the second magnet 5 are both slidably connected to the fixed rod 31. The first magnet 4 is located at the bottom end of the upper pressure rod 1, and the second magnet 5 is located at the bottom end of the lower pressure rod 2. The positions of the first magnet 4 and the second magnet 5 are vertically corresponding, and both are ring magnets.
[0024] like Figure 1 As shown, a spring 9 is sleeved on the fixing rod 31. The spring 9 abuts between the lower pressing rod 2 and the sleeve 32. In some other embodiments, if the second magnet 5 is set at the upper end of the lower pressing rod 2, the upper end of the spring 9 directly abuts against the lower pressing rod 2. However, in this embodiment, since the second magnet 5 is set at the bottom end of the lower pressing rod 2, the upper end of the spring 9 abuts against the second magnet 5. The spring 9 is compressed and applies an upward restoring force to the lower pressing rod 2.
[0025] like Figure 1As shown in the figure, the upper end of the sleeve shell 32 is threadedly connected with a compression nut 8, and the fixing structure is a threaded stud 10 arranged at the bottom end of the base 3.
[0026] As shown in the figure, the fixing member is a compression buckle 7 arranged on the upper pressing rod 1, and the upper pressing rod 1 is fixed with the base 3 by rotating the compression buckle 7. Figure 1 and Figure 2 As shown in the figure, the fixing member is a compression buckle 7 arranged on the upper pressing rod 1, and the upper pressing rod 1 is fixed with the base 3 by rotating the compression buckle 7.
[0027] In order to avoid the first magnet 4 and the second magnet 5 generating attractive force on the fixing rod 31 and the sleeve shell 32 and affecting the positioning of the lower pressing rod 2 on the measured member, the fixing rod 31 and the sleeve shell 32 are made of copper, of course, the fixing rod 31 and the sleeve shell 32 can also be made of aluminum or other materials that will not be attracted by the magnet, and similarly, the fixing rod 31 is also made of copper or aluminum.
[0028] As shown in the figure, the lower end of the lower pressing rod 2 is connected with a rubber pressing head 11. Figure 1
[0029] The lower pressing rod 2 is used for positioning the measured member, and the rubber pressing head 11 is in contact with the measured member, and the first magnet 4 on the upper pressing rod 1 exerts downward repulsive force on the second magnet 5 on the lower pressing rod 2, so that the lower pressing rod 2 is pressed on the measured member, and the fixing force of the lower pressing rod 2 on the measured member can be adjusted by adjusting the distance between the upper pressing rod 1 and the lower pressing rod 2, realizing flexible compression, ensuring the positioning of the measured member on the premise of preventing damage to the surface of the measured member, and the upper pressing rod 1 can be fixed at any height of the base 3 through the fixing member, realizing stepless adjustment, being suitable for measured members of various sizes, having low requirements for the measured member, expanding the application range of the three-coordinate auxiliary clamp, adopting the locking mode of the compression buckle 7, being convenient and fast, and being high in efficiency.
[0030] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned one embodiment, and all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection range of the utility model.
Claims
1. A three-coordinate auxiliary fixture, characterized by, The utility model provides a kind of magnetic pressing device, including upper pressing rod (1), lower pressing rod (2) and pedestal (3), the pedestal (3) is equipped with the fixed structure for being fixed to detection platform, the upper pressing rod (1) and the lower pressing rod (2) are vertically slidably connected on the pedestal (3) and the upper pressing rod (1) is located above the lower pressing rod (2), the upper pressing rod (1) is equipped with first magnet (4), the lower pressing rod (2) is equipped with second magnet (5), the first magnet (4) and the second magnet (5) repel each other and drive the lower pressing rod (2) to move downwards, the upper pressing rod (1) is equipped with the fixing part for fixing the upper pressing rod (1) with the pedestal (3).
2. The three-dimensional auxiliary fixture according to claim 1, wherein The pedestal (3) includes fixed rod (31) and open-ended sleeve (32), the fixed rod (31) is vertically arranged in the sleeve (32), the sleeve (32) is provided with through slot (6) at the upper end, and the through slot (6) extends downward and penetrates the side wall of the sleeve (32), the upper pressing rod (1) and the lower pressing rod (2) are slidably connected to the fixed rod (31) and extend out through the through slot (6).
3. The three-dimensional auxiliary fixture according to claim 1 or 2, wherein The fixing part is a pressing buckle (7) arranged on the upper pressing rod (1), which fixes the upper pressing rod (1) and the pedestal (3) by rotating the pressing buckle (7).
4. The three-dimensional auxiliary fixture according to claim 2, wherein The sleeve (32) is threadedly connected with a compression nut (8) at the upper end.
5. The three-dimensional auxiliary fixture according to claim 2, wherein The first magnet (4) and the second magnet (5) are slidably connected to the fixed rod (31).
6. The three-dimensional auxiliary fixture according to claim 2, wherein The fixed rod (31) is sleeved with a spring (9), which is arranged between the lower pressing rod (2) and the sleeve (32).
7. The three-dimensional auxiliary fixture according to claim 2, wherein The fixed rod (31) and the sleeve (32) are made of copper.
8. The three-dimensional auxiliary fixture according to claim 1, wherein The fixed structure is a threaded stud (10) arranged at the bottom end of the pedestal (3).
9. The three-dimensional auxiliary fixture according to claim 1, wherein The lower pressing rod (2) is connected with a rubber pressure head (11) at one end.