A three-point diameter measuring gauge

Abstract

This utility model relates to the field of inspection tool technology, specifically a three-point diameter measuring gauge, comprising: a device body, the device body including a support frame, a positioning frame disposed on the surface of the support frame, a dial indicator disposed at one end of the positioning frame, and placement platforms disposed on both sides of the surface of the support frame; an anti-wear mechanism is inserted inside the top of the dial indicator, the anti-wear mechanism including a concave plate, and a ball bearing disposed inside the top of the concave plate. This utility model, by inserting the concave plate inside the top of the placement platform, allows for height adjustment by rotating the adjusting screw in the opposite direction, thereby adjusting the height of the concave plate to accommodate workpieces of different thicknesses for inspection, reducing friction during workpiece movement, and preventing the workpiece from scraping against the placement platform, causing workpiece wear, and affecting flatness and aesthetics.

Description

Technical Field

[0001] This utility model relates to the field of inspection tool technology, specifically a three-point diameter measuring gauge. Background Technology

[0002] The measurement of the mating dimensions of the wheel hub and rim, key components of the axle assembly, is crucial. The wheel hub has a unique structure with five evenly distributed bosses, making it impossible to inspect symmetrically with digital calipers or outside micrometers. Only coordinate measuring machines (CMMs) can be used. However, due to the weight of the machined parts, they must be transported to the CMM room for inspection, which is time-consuming and labor-intensive. In contrast, a three-point diameter measuring gauge allows for on-site measurement and timely adjustments during machining, effectively ensuring product quality and preventing anomalies from being discovered after mass production, thus avoiding losses.

[0003] When using the existing three-point diameter measuring gauge, the working method is to first use the calibration ring to calibrate the inner diameter gauge, zero the dial indicator, then place the workpiece on the inspection platform, move it forward in parallel, and have the two side positioning points contact the hub boss. The middle boss is measured with a dial indicator, and the machining parameters are adjusted on the machine tool according to the ± value of the measurement. However, when the workpiece is moved, the existing gauge causes the workpiece and the placement platform to scrape against each other, which can easily cause wear on the workpiece and affect the flatness and aesthetics. Utility Model Content

[0004] The purpose of this utility model is to provide a three-point diameter measuring gauge to solve the problem mentioned in the background art that when the workpiece is moved, the workpiece and the placement table scrape against each other, which easily causes wear on the workpiece and affects its flatness and aesthetics.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a three-point diameter measuring gauge, comprising:

[0006] The device body includes a support frame, a positioning frame is provided on the surface of the support frame, a dial indicator is provided at one end of the positioning frame, and a placement platform is provided on both sides of the surface of the support frame.

[0007] The dial indicator has an anti-wear mechanism inserted inside its top. The anti-wear mechanism includes a concave plate with a ball bearing inside its top. The two sides of the concave plate are hinged to each other. The top surface of the hinge plate is connected to a bearing. The top of the bearing is connected to a threaded sleeve. The top of the threaded sleeve is rotatably connected to an adjusting screw. The outer surface of the top of the adjusting screw is rotatably connected to a slide.

[0008] Preferably, the top surface of the placement platform has a groove, the concave plate is inserted into the groove of the placement platform, the concave plate and the ball are movably connected, the concave plate has movable slots on both sides, and one end of the hinge plate is inserted into the movable slot of the concave plate and is hinged to the concave plate.

[0009] Preferably, the hinge plate and the threaded sleeve are movably connected by bearings, the threaded sleeve and the adjusting screw are rotatably connected by threads, and the slide is disposed on one side of the support frame surface.

[0010] Preferably, the slide has a through groove on its surface, one end of the hinge plate is inserted into the through groove of the slide and slidably connected to the slide, and a threaded hole is provided on one side of the inner wall of the through groove of the slide, and the top end of the adjusting screw is rotatably connected to the threaded hole of the slide.

[0011] Preferably, a limiting structure is connected to one side of the carriage. The limiting structure includes a fixing frame, a positioning plate is inserted inside the bottom end of the fixing frame, fixing screws are connected to both sides of the top surface of the positioning plate, and nuts are rotatably connected to the outer surface of the top of the fixing screws.

[0012] Preferably, the positioning plate is connected to the surface of the support frame, and a positioning groove is provided on the bottom surface of the fixed frame, and the positioning plate is inserted into the positioning groove provided in the fixed frame.

[0013] Preferably, the positioning groove of the fixing frame has slots on both sides, the fixing screw is inserted into the slot of the fixing frame, and the fixing screw and the nut are rotatably connected by threads.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. By inserting a concave plate into the top of the placement table, the friction between the concave plate and the workpiece is reduced using ball bearings. The hinge plate is rotated so that one end is inserted into a slot in the carriage. The adjusting screw is then rotatably connected to a threaded hole in the carriage. While fixing the threaded sleeve angle, the bottom end of the adjusting screw is rotatably connected to the threaded sleeve. The threaded sleeve is then released. When adjusting the height of the concave plate, the adjusting screw is rotated in the opposite direction, causing the concave plate to move simultaneously. Bearings ensure that the threaded sleeve does not affect the hinge plate angle when rotating with the adjusting screw, thus achieving height adjustment of the concave plate. This allows for the placement of workpieces of different thicknesses for inspection, reduces friction during workpiece movement, and prevents the workpiece from scraping against the placement table, causing wear and affecting flatness and aesthetics.

[0016] 2. By attaching the fixed frame connected to one side of the carriage to the outer wall of the top of the positioning plate, the positioning plate is positioned using the positioning groove opened in the fixed frame, and the top of the fixing screw is inserted into the slot of the fixed frame. Then, the nut is rotated and connected to the outer surface of the top of the fixing screw. The nut, together with the positioning plate, clamps and fixes the fixed frame, thereby limiting the carriage connected to both ends of the fixed frame and achieving the limiting effect between the support frame and the carriage. Attached Figure Description

[0017] Figure 1 This is a three-dimensional front view of the structure of this utility model;

[0018] Figure 2 This is a three-dimensional sectional view of the structure of this utility model.

[0019] Figure 3 This is a partial sectional perspective view of the structure of this utility model from the right side.

[0020] Figure 4 This utility model Figure 3 Enlarged 3D structural diagram at point A;

[0021] Figure 5 This is a partial cross-sectional perspective view of the structure of this utility model from the left.

[0022] In the diagram: 1. Device body; 11. Support frame; 12. Positioning frame; 13. Dial indicator; 14. Placement platform; 2. Anti-wear mechanism; 21. Concave plate; 22. Ball bearing; 23. Hinge plate; 24. Bearing; 25. Threaded sleeve; 26. Adjusting screw; 27. Slide; 3. Limiting structure; 31. Fixing frame; 32. Positioning plate; 33. Fixing screw; 34. Nut. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 One embodiment provided by this utility model:

[0025] A three-point diameter measuring gauge includes:

[0026] The device body 1 includes a support frame 11, a positioning frame 12 is provided on the surface of the support frame 11, a dial indicator 13 is provided at one end of the positioning frame 12, and a placement platform 14 is provided on both sides of the surface of the support frame 11. The internal material of the placement platform 14 is existing technology and can be purchased on the market. It is not considered as a technical protection point of this application, therefore, no further details are made.

[0027] The dial indicator 13 has an anti-wear mechanism 2 inserted inside its top. The anti-wear mechanism 2 includes a concave plate 21. A ball bearing 22 is installed inside the top of the concave plate 21. A hinge plate 23 is hinged to both sides of the concave plate 21. A bearing 24 is connected to the top surface of the hinge plate 23. A threaded sleeve 25 is connected to the top of the bearing 24. An adjusting screw 26 is rotatably connected inside the top of the threaded sleeve 25. A slide 27 is rotatably connected to the outer surface of the top of the adjusting screw 26.

[0028] Furthermore, a groove is provided on the top surface of the placement platform 14, and a concave plate 21 is inserted into the groove of the placement platform 14. The concave plate 21 and the ball bearing 22 are movably connected. Movable slots are provided on both sides of the concave plate 21, and one end of the hinge plate 23 is inserted into the movable slot of the concave plate 21 and hinged to the concave plate 21. This allows the hinge plate 23 to be limited by the movable slot of the concave plate 21 and can also be stored.

[0029] Furthermore, the hinge plate 23 and the threaded sleeve 25 are movably connected by the bearing 24, and the threaded sleeve 25 and the adjusting screw 26 are rotatably connected by the thread. The slide 27 is set on one side of the support frame 11, so that the hinge plate 23 can be positioned by the slide 27, thereby allowing the concave plate 21 to move vertically.

[0030] Furthermore, a through groove is provided on the surface of the slide 27, and one end of the hinge plate 23 is inserted into the through groove of the slide 27 and slidably connected to the slide 27. A threaded hole is provided on one side of the inner wall of the through groove of the slide 27, and the top end of the adjusting screw 26 is rotatably connected to the threaded hole of the slide 27, so as to limit the top end of the adjusting screw 26 through the threaded hole of the slide 27, and lock the adjusting screw 26 with the thread after the adjusting screw 26 is rotated.

[0031] Furthermore, a limiting structure 3 is connected to one side of the slide 27. The limiting structure 3 includes a fixed frame 31. A positioning plate 32 is inserted inside the bottom end of the fixed frame 31. Fixed screws 33 are connected to both sides of the top surface of the positioning plate 32. Nuts 34 are rotatably connected to the outer surface of the top end of the fixed screws 33, thereby limiting the slide 27 connected to both ends of the fixed frame 31, and thus limiting the distance between the support frame 11 and the slide 27.

[0032] Furthermore, the positioning plate 32 is connected to the surface of the support frame 11, and the bottom surface of the fixed frame 31 is provided with a positioning groove. The positioning plate 32 is inserted into the positioning groove of the fixed frame 31, so that the positioning plate 32 is positioned by the positioning groove of the fixed frame 31, and the fixed frame 31 is prevented from shifting left and right by the positioning plate 32.

[0033] Furthermore, slots are provided on both sides of the inner wall of the positioning groove of the fixing frame 31. The fixing screw 33 is inserted into the slot of the fixing frame 31. The fixing screw 33 and the nut 34 are connected by threads, so that the fixing screw 33 and the nut 34 are connected and fixed by threads. Thus, the nut 34 is used to clamp and fix the fixing frame 31 in conjunction with the positioning plate 32.

[0034] Working principle: When performing anti-wear treatment on the three-point diameter measuring gauge, the concave plate 21 is inserted into the top of the placement table 14. The ball bearing 22 reduces the friction between the concave plate 21 and the workpiece. The hinge plate 23 is rotated so that one end is inserted into the through slot of the slide 27. Then, the adjusting screw 26 is rotatably connected to the threaded hole of the slide 27. When the angle of the threaded sleeve 25 is fixed, the bottom end of the adjusting screw 26 is rotatably connected to the threaded sleeve 25. Then, the threaded sleeve 25 is released. When adjusting the height of the concave plate 21, the angle of the adjusting screw 26 is rotated in the opposite direction, so that the concave plate 21 moves simultaneously. The bearing 24 ensures that the angle of the hinge plate 23 is not affected when the threaded sleeve 25 rotates with the adjusting screw 26, thereby realizing the height adjustment of the concave plate 21 to place workpieces of different thicknesses for inspection and reduce the friction when the workpiece moves.

[0035] When assembling the three-point diameter measuring gauge, the fixing frame 31 connected to one side of the slide 27 is sleeved onto the outer wall of the top of the positioning plate 32. The positioning plate 32 is positioned using the positioning groove opened in the fixing frame 31, and the top of the fixing screw 33 is inserted into the slot of the fixing frame 31. Then, the nut 34 is rotated and connected to the outer surface of the top of the fixing screw 33. The nut 34, together with the positioning plate 32, clamps and fixes the fixing frame 31, thereby limiting the slide 27 connected to both ends of the fixing frame 31 and achieving the limiting effect between the support frame 11 and the slide 27.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A three-point diameter measuring gauge, characterized in that, include: The device body (1) includes a support frame (11), a positioning frame (12) is provided on the surface of the support frame (11), a dial indicator (13) is provided at one end of the positioning frame (12), and a placement platform (14) is provided on both sides of the surface of the support frame (11). The dial indicator (13) is equipped with an anti-wear mechanism (2) inside its top end. The anti-wear mechanism (2) includes a concave plate (21). A ball bearing (22) is provided inside the top end of the concave plate (21). A hinge plate (23) is hinged to both sides of the concave plate (21). A bearing (24) is connected to the top surface of the hinge plate (23). A threaded sleeve (25) is connected to the top end of the bearing (24). An adjusting screw (26) is rotatably connected inside the top end of the threaded sleeve (25). A slide (27) is rotatably connected to the outer surface of the top end of the adjusting screw (26).

2. The three-point diameter measuring gauge according to claim 1, characterized in that: The top surface of the placement platform (14) is provided with a groove, and the concave plate (21) is inserted into the groove of the placement platform (14). The concave plate (21) and the ball (22) are connected in a movable manner. Movable slots are provided on both sides of the concave plate (21). One end of the hinge plate (23) is inserted into the movable slot of the concave plate (21) and is hinged to the concave plate (21).

3. The three-point diameter measuring gauge according to claim 1, characterized in that: The hinge plate (23) and the threaded sleeve (25) are movably connected by a bearing (24), the threaded sleeve (25) and the adjusting screw (26) are rotatably connected by a thread, and the slide (27) is disposed on one side of the surface of the support frame (11).

4. The three-point diameter measuring gauge according to claim 1, characterized in that: The slide (27) has a through groove on its surface. One end of the hinge plate (23) is inserted into the through groove of the slide (27) and slidably connected to the slide (27). A threaded hole is provided on one side of the inner wall of the through groove of the slide (27). The top end of the adjusting screw (26) is rotatably connected to the threaded hole of the slide (27).

5. A three-point diameter measuring gauge according to claim 1, characterized in that: The slide (27) is connected to a limiting structure (3) on one side. The limiting structure (3) includes a fixing frame (31). A positioning plate (32) is inserted inside the bottom end of the fixing frame (31). Fixing screws (33) are connected to both sides of the top surface of the positioning plate (32). Nuts (34) are rotatably connected to the outer surface of the top end of the fixing screws (33).

6. A three-point diameter measuring gauge according to claim 5, characterized in that: The positioning plate (32) is connected to the surface of the support frame (11), and the bottom surface of the fixed frame (31) is provided with a positioning groove. The positioning plate (32) is inserted into the positioning groove of the fixed frame (31).

7. A three-point diameter measuring gauge according to claim 5, characterized in that: The positioning groove of the fixing frame (31) has slots on both sides. The fixing screw (33) is inserted into the slot of the fixing frame (31). The fixing screw (33) and the nut (34) are connected by a thread.

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