Flatness testing fixture for small products
By designing the planarity tester for small-piece products, using structures such as movable blocks and clamping cylinders, the problem of unstable reference surface of the lever watch is solved, and flexible adjustment and high-precision planarity detection is achieved. It is suitable for small-piece products of various shapes and sizes.
Patent Information
- Application Number
- CN202422395818.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-30
AI Technical Summary
When existing lever tables detect the flatness of small products, the unstable reference surface leads to large detection errors and are difficult to adapt to products of different height sizes.
A small product plane detection tool, including a base, measuring mechanism and loading mechanism, is designed to drive the platform to approach or away from the lever watch through the movable block, combined with the clamping cylinder and limiting structure to ensure the product is stable and fixed, and adapt to product inspection of different shapes and heights through the height and angle adjustment of the lever watch.
提高了检测的稳定性和适用性,能够灵活调整基准面,适用于不同形状和高度的产品,减少检测误差,增加了检测的灵活性和精度。
Smart Images
Figure CN223091225U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of detection instruments, in particular to a flatness gauge for small parts. Background Art
[0002] Flatness refers to the deviation of the macroscopic uneven height of a substrate relative to an ideal plane, belonging to the shape error in form and position errors. Flatness measurement refers to the variation of the measured actual surface relative to its ideal plane. The flatness error is obtained by comparing the measured actual surface with the ideal plane, and the linear distance between the two is the flatness error value; or by measuring the relative height differences of several points on the actual surface and then converting them into the flatness error value expressed in linear values.
[0003] The instrument commonly used for measuring flatness is a lever dial indicator; the lever dial indicator, also known as a lever gauge or a dial indicator, is a measuring instrument that uses a lever-gear transmission mechanism or a lever-screw transmission mechanism to convert dimensional changes into pointer angular displacements and indicate the length dimension values. It is used to measure the geometric shape errors and the correctness of the relative positions of workpieces, and can also measure lengths by the comparison method.
[0004] When using a lever gauge to detect the flatness of an object, the reference plane where the lever gauge is located should be kept unchanged when changing the measuring points. If the reference plane where the lever gauge is located is unstable, the detection error will be relatively large. Content of the Utility Model
[0005] In view of this, the purpose of the utility model is to provide a flatness gauge for small parts that is convenient for adjusting the use of a lever gauge.
[0006] To achieve the above purpose, the technical solution adopted by the utility model is a flatness gauge for small parts, which includes a base, a measuring mechanism and a loading mechanism;
[0007] The measuring mechanism includes a bracket, a support and a lever dial indicator. The bracket is vertically fixed at one end of the base. The support is slidably sleeved on the bracket. The lever dial indicator is fixed on the support. A positioning screw is arranged on the support for fixing the position of the lever dial indicator;
[0008] The loading mechanism includes a movable block, a rotating shaft and a loading platform. The movable block is slidably arranged at the other end of the base. The movable block can drive the loading platform to approach or move away from the lever dial indicator. The rotating shaft is rotatably arranged on the movable block. The loading platform is fixed at the top of the rotating shaft;
[0009] A limiting structure is arranged on the movable block for fixing the position of the movable block.
[0010] The beneficial effects of the above technical solution are as follows: The movable block can drive the carrier table to approach or move away from the dial indicator, thereby providing the basis for the detection of the dial indicator. At the same time, the carrier table can rotate, which is convenient for the measured product to adjust the surface facing the dial indicator, and then correspondingly detect the flatness of the surface to be measured, facilitating measurement and use; the dial indicator can adjust its height as the support slides up and down on the bracket. On the one hand, it provides a reference surface to ensure the stability of the dial indicator relative to the reference surface where the product is located. On the other hand, it can be applied to the flatness detection of products with different height dimensions, improving the practicability of the inspection tool.
[0011] Further, a threaded hole is provided on the side surface of the support, and the positioning screw is threadedly connected in the threaded hole for fixing the support on the bracket.
[0012] Beneficial effect: The positioning screw can fix the support on the bracket, that is, fix the position of the dial indicator.
[0013] Further, the carrier table is of a circular structure, and a clamping cylinder is fixed at the edge of the carrier table. The telescopic end of the clamping cylinder faces the center of the carrier table, and several groups of clamping cylinders are arranged at intervals in the circumferential direction.
[0014] Beneficial effect: The clamping cylinder can ensure that the product is fixed at the center position of the circular carrier table, preventing the product from shaking during the detection process and affecting the detection result.
[0015] Further, a sliding part is provided at the bottom of the movable block, and a sliding groove is provided on the base, and the sliding part is adapted to the sliding groove.
[0016] Beneficial effect: It provides a sliding connection method, which is convenient for adjusting the distance between the product and the dial indicator.
[0017] Further, one end of the sliding groove away from the dial indicator is an open structure, and the movable block can slide in and out at the opening.
[0018] Beneficial effect: It is convenient for the assembly of the movable block and is easy to install.
[0019] Further, the cross-section of the sliding groove is in a convex shape, and the sliding part is correspondingly clamped on both sides of the bottom of the convex-shaped sliding groove.
[0020] Beneficial effect: It can limit the movable block vertically and prevent the movable block from detaching from the base.
[0021] Further, the limiting structure includes a limiting bolt. A long hole is provided on the base, and the long hole is located on the front and back sides of the sliding groove and corresponds to the position of the sliding part of the movable block. A threaded hole is provided on the sliding part of the movable block, and the limiting bolt is adapted to pass through the long hole and is threadedly connected in the threaded hole of the sliding part.
[0022] Beneficial effects: The limit bolt can fix the movable block on the base, and at the same time, the limit bolt passing through the long hole can prevent the movable block from slipping off from the opening of the chute.
[0023] Furthermore, length scale lines are marked on the bracket.
[0024] Beneficial effects: It is convenient to record data during the detection process. Description of the Drawings
[0025] Figure 1 is a structural schematic diagram of the present utility model;
[0026] Figure 2 is Figure 1 the front view of
[0027] Figure 3 is Figure 1 the side view of
[0028] Figure 4 is Figure 1 the structural schematic diagram when the movable block slides to the end;
[0029] In the figure: 1 - base, 2 - bracket, 3 - support, 4 - dial indicator, 5 - positioning screw, 11 - movable block, 12 - rotating shaft, 13 - carrier table, 14 - clamping cylinder, 15 - sliding part, 101 - chute, 201 - long hole. Detailed Implementation Manner
[0030] The following further describes in detail a flatness gauge for small parts of the present utility model in conjunction with the drawings and specific implementation manners.
[0031] As Figures 1-4 shown, a flatness gauge for small parts of the present utility model includes a base 1, a measuring mechanism and a loading mechanism. The measuring mechanism includes a bracket 2, a support 3 and a dial indicator 4. The bracket 2 is vertically fixed at one end of the base 1. The support 3 is slidably sleeved on the bracket 2. The dial indicator 4 is fixed on the support 3. A positioning screw 5 is arranged on the support 3, and the positioning screw 5 is used to fix the position of the dial indicator 4. The loading mechanism includes a movable block 11, a rotating shaft 12 and a carrier table 13. The movable block 11 is slidably arranged at the other end of the base 1. The movable block 11 can drive the carrier table 13 to approach or move away from the dial indicator 4. The rotating shaft 12 is rotatably arranged on the movable block 11. The carrier table 13 is fixed at the top of the rotating shaft 12. A limiting structure is arranged on the movable block 11, and the limiting structure is used to fix the position of the movable block 11.
[0032] In this embodiment, a threaded hole is formed on the side surface of the support 3. The positioning screw 5 is threadedly connected to the threaded hole to fix the support 3 on the bracket 2. The length scale is marked on the bracket 2 to facilitate recording data during the detection process. When the positioning screw 5 is tightened, the position of the dial indicator 4 is fixed. The product is moved to the lower part of the head of the dial indicator 4, and the flatness of the upper surface of the product can be horizontally measured by sliding the movable block 11.
[0033] In this embodiment, the carrier table 13 is of a circular structure. The clamping cylinder 14 is fixed to the edge of the carrier table 13. The telescopic end of the clamping cylinder 14 faces the center of the carrier table 13. A number of groups of clamping cylinders 14 are arranged at intervals in the circumferential direction. When the product is placed on the carrier table 13, the clamping cylinder 14 can ensure that the product is fixed at the center position of the circular carrier table 13. The weight of small products is relatively light. Through the fixation of the clamping cylinder 14, the shaking of the product during the detection process can be prevented from affecting the detection result.
[0034] In this embodiment, a sliding part 15 is provided at the bottom of the movable block 11. A sliding groove 101 is formed on the base 1. The sliding part 15 is adapted to the sliding groove 101. One end of the sliding groove 101 away from the dial indicator 4 is an open structure, and the movable block 11 can slide in and out at the opening, providing a sliding connection method for the movable block 11. The opening at the end of the sliding groove 101 facilitates the assembly of the movable block 11. The cross section of the sliding groove 101 is convex-shaped, and the sliding part 15 is correspondingly clamped on both sides of the bottom of the convex-shaped sliding groove 101, which can limit the movable block 11 vertically and prevent the movable block 11 from detaching from the base 1.
[0035] In this embodiment, the limiting structure includes a limiting bolt. A long hole 201 is formed on the base 1. The long hole 201 is located on the front and back sides of the sliding groove 101 and corresponds to the position of the sliding part 15 of the movable block 11. A threaded hole is formed on the sliding part 15 of the movable block 11. The limiting bolt is adapted to pass through the long hole 201 and is threadedly connected to the threaded hole of the sliding part 15, which can prevent the movable block 11 from slipping out of the opening of the sliding groove 101. At the same time, the limiting bolt can fix the movable block 11 on the base 1. At this time, the positioning screw 5 is loosened, and the dial indicator 4 is moved up and down to vertically detect the flatness of the product in contact with the side surface of the dial indicator 4.
[0036] When the utility model is in use, there are two flatness detection methods. One is the top surface horizontal detection method, and the other is the side vertical detection method, which can be flexibly selected according to the shape of the product to be detected. For example, if the product is a regular cuboid structure, both methods can be used. When measuring the top surface, first move the dial indicator 4 to the top, then move the movable block 11 to make the top surface of the product close to the probe head of the dial indicator 4, and lock the positioning screw 5 to fix the position of the dial indicator 4. Move the movable block 11 left and right to observe the reading of the dial indicator 4. When measuring the side surface, first move the movable block 11 to make the side surface of the product contact the probe head of the dial indicator 4, and fix the position of the movable block 11 through the limit bolt. Move the dial indicator 4 up and down to observe the reading of the dial indicator 4. Further, for the curved surface contour accuracy of a cylinder, it can also be measured. Fix the cylinder vertically at the center of the carrier 13. After moving the movable block 11 close to the curved surface, rotate the cylinder through the rotating shaft 12 and observe the reading of the dial indicator 4.
[0037] The flatness gauge for small parts of the utility model has the following advantages: First, it is convenient to use. The movable block 11 drives the carrier 13 to move left and right, which is convenient to adjust the contact between the product and the dial indicator 4. The product can also be rotated to change the detection surface. In addition, the dial indicator 4 can be adjusted up and down with flexible adjustment. Second, the detection method is flexible. It can not only horizontally move the product to detect the flatness of the top surface, but also vertically move the dial indicator 4 to detect the flatness of the side surface, which has strong applicability for small parts products with different shapes and structures. Third, the detection targets are diverse. It can not only measure the flatness, but also for small cylindrical products, it can measure the contour accuracy of the curved surface by rotating the dial indicator 4, increasing the functions.
[0038] In the above embodiment, the carrier is of a circular structure, and a clamping cylinder is fixed at the edge of the carrier. The telescopic end of the clamping cylinder faces the center of the carrier. Several groups of clamping cylinders are arranged at intervals in the circumferential direction. In other embodiments, the carrier can be of a rectangular structure, and no clamping cylinder may be provided around the carrier.
[0039] In the above embodiment, a sliding part is provided at the bottom of the movable block, and a chute is opened on the base. The sliding part is adapted to the chute. In other embodiments, a slide rail is provided on the base, and the movable block is slidably connected to the slide rail.
[0040] In the above embodiment, the cross-section of the chute is convex-shaped, and the sliding part is correspondingly clamped on both sides of the bottom of the convex-shaped chute. In other embodiments, the cross-section of the chute is a dovetail shape with a smaller upper part and a larger lower part.
[0041] In the above embodiment, length scale lines are marked on the support. In other embodiments, no length scale lines are marked on the support.
[0042] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A flatness gauge for small parts, characterized in that, It includes a base (1), a measuring mechanism and a loading mechanism; The measuring mechanism includes a bracket (2), a support (3) and a dial indicator (4). The bracket (2) is vertically fixed at one end of the base (1). The support (3) is slidably sleeved on the bracket (2), and the dial indicator (4) is fixed on the support (3). A positioning screw (5) is provided on the support (3), and the positioning screw (5) is used to fix the position of the dial indicator (4); The loading mechanism includes a movable block (11), a rotating shaft (12) and a loading platform (13). The movable block (11) is slidably arranged at the other end of the base (1), and the movable block (11) can drive the loading platform (13) to approach or move away from the dial indicator (4). The rotating shaft (12) is rotatably arranged on the movable block (11), and the loading platform (13) is fixed at the top of the rotating shaft (12); A limiting structure is provided on the movable block (11), and the limiting structure is used to fix the position of the movable block (11).
2. The flatness gauge for small parts according to claim 1, characterized in that, A threaded hole is formed on the side surface of the support (3), and the positioning screw (5) is threadedly connected in the threaded hole to fix the support (3) on the bracket (2).
3. The flatness gauge for small parts according to claim 1, characterized in that, The loading platform (13) is of a circular structure. A clamping cylinder (14) is fixed at the edge of the loading platform (13). The telescopic end of the clamping cylinder (14) faces the center of the loading platform (13), and several groups of clamping cylinders (14) are arranged at intervals in the circumferential direction.
4. The flatness gauge for small parts according to claim 1, characterized in that, A sliding part (15) is provided at the bottom of the movable block (11), and a sliding groove (101) is formed on the base (1). The sliding part (15) is adapted to the sliding groove (101).
5. The flatness gauge for small parts according to claim 4, characterized in that, One end of the sliding groove (101) away from the dial indicator (4) is of an open structure, and the movable block (11) can slide in and out at the opening.
6. The flatness gauge for small parts according to claim 4, characterized in that, The cross-section of the sliding groove (101) is of a convex shape, and the sliding part (15) is correspondingly clamped on both sides of the bottom of the convex-shaped sliding groove (101).
7. The flatness gauge for small parts according to claim 4, characterized in that, The limiting structure includes a limiting bolt (21). A long hole (201) is formed on the base (1). The long hole (201) is located on the front and back sides of the sliding groove (101), and the position of the long hole (201) corresponds to the sliding part (15) of the movable block (11). A threaded hole is formed on the sliding part (15) of the movable block (11), and the limiting bolt (21) is adapted to pass through the long hole (201) and is threadedly connected in the threaded hole of the sliding part (15).
8. A flatness gauge for small parts according to claim 1, characterized in that, Length scale lines are marked on the bracket (2).