Caliper for measuring screw head thickness

Abstract

The utility model discloses a callipers for measuring screw head thickness relates to the technical field of screw head thickness measurement, including support plate, the inner wall of support plate is equipped with inclined slot, is used for clamping the screw of different size, the top of support plate is provided with extrusion board, be provided with support mechanism between extrusion board and support plate for making extrusion board can move up and down. The utility model discloses the design structure is reasonable, it will drive its laser emitter synchronous movement through extrusion board, when the screw thickness is unqualified, the light is shielded to the shielding mechanism, when the screw thickness is qualified, the laser passes through shielding mechanism and irradiates on the display board, just need to observe whether the display board has the light spot discernible screw's qualified condition, increase use efficiency, thereby solved the current in every time detection screw head thickness, all need to carry out reading, then compare with the design size, so as to obtain qualified or unqualified, too much complicated, the problem of relatively low efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of screw head thickness measurement, specifically a caliper used to measure screw head thickness. Background Technology

[0002] A screw is a common fastener, typically referring to a rod-shaped part with external threads. It needs to be used with a hole with internal threads (a nut or a pre-tapping hole) to fasten or connect two or more parts by rotating. The screw head is the key part of the screw, which determines the screw's driving method (what tool is used to tighten / loosen) and its appearance / function after installation. Whether the screw head thickness meets the standard is an important parameter for whether the finished screw is qualified. Currently, the thickness of the screw head is generally tested.

[0003] A search revealed a Chinese utility model patent, entitled "Screw Head Thickness Detection Device," publication number CN207622658U. This device includes a flat worktable with a test platform on its top surface for fixing screws. The test platform's top surface is horizontally positioned and has a vertical screw hole for the screw to be inserted. A screw is inserted into the screw hole, with the bottom surface of the screw head resting against the top surface of the test platform. A vertical slide rail is fixed to the top surface of the test platform. A slide block that can slide up and down along the slide rail is mounted on the slide block. A flat pressure plate is fixed to the slide block, with its bottom surface horizontally positioned. This device is specifically designed for detecting the thickness of screw heads.

[0004] However, in screw factories, the number of screws is usually large. The above-mentioned device needs to take a reading each time it checks the thickness of the screw head and then compare it with the design dimensions to determine whether it is qualified or unqualified. This is too cumbersome and inefficient. Therefore, we provide calipers for measuring the thickness of screw heads to solve the above problems. Utility Model Content

[0005] Technical problem solved: This utility model proposes a caliper for measuring the thickness of screw heads. By setting up components such as a pressing plate and a laser emitter, it solves the problem that the existing method of measuring the thickness of screw heads every time and then comparing it with the design dimensions to determine whether it is qualified or unqualified is too cumbersome and inefficient.

[0006] Technical Solution: To achieve the above objectives, this utility model provides the following technical solution: a caliper for measuring the thickness of screw heads, comprising a support plate, wherein the inner wall of the support plate is provided with a slanted groove for clamping screws of different sizes; a pressing plate is provided above the support plate, and a supporting mechanism is provided between the pressing plate and the support plate for allowing the pressing plate to move up and down; a laser emitter is mounted on the upper surface of the pressing plate, a shielding mechanism is provided on the inner wall of the support plate, and a display panel is fixedly connected to the side of the support plate.

[0007] Furthermore, a support rod is fixedly installed on one side of the support plate, and a pressing plate is fixedly connected to one side of the pressing plate.

[0008] Furthermore, the support mechanism includes a fixed cylinder, the lower end and the upper end of which are fixedly connected to the support plate, and a sliding cylinder is slidably connected to the inner wall of the fixed cylinder.

[0009] Furthermore, a spring is fixedly connected to the inner wall of the fixed cylinder, and the upper end of the spring is fixedly connected to the sliding cylinder.

[0010] Furthermore, a sleeve is fixedly connected to the upper surface of the extrusion plate, and the inner wall of the sleeve is fixedly connected to the sliding cylinder.

[0011] Furthermore, the shielding mechanism includes a shielding plate, the outer surface of which is slidably connected to the support plate, and the inner wall of the shielding plate has a circular hole.

[0012] Furthermore, a fixing plate is fixedly connected to the lower surface of the shielding plate, and a fixing rod is threadedly connected to the inner wall of the fixing plate. The end of the fixing rod is rotatably connected to the support plate.

[0013] Beneficial effects: Compared with existing technologies, this caliper for measuring screw head thickness has the following beneficial effects:

[0014] I. This caliper for measuring screw head thickness, through the inclusion of a pressing plate and a laser emitter, uses a pressing plate to press down so that its lower surface presses against the upper surface of the screw head. Simultaneously, the pressing plate drives the laser emitter to move synchronously. When the screw thickness is unqualified, a blocking mechanism blocks the light; when the screw thickness is qualified, the laser passes through the blocking mechanism and shines on the display panel. The screw's qualification status can be determined simply by observing whether there is a light spot on the display panel, eliminating the need to compare with the scale, thus increasing efficiency. This solves the problem of existing methods that require reading the screw head thickness every time and comparing it with the design dimensions to determine whether it is qualified or unqualified, which is too cumbersome and inefficient.

[0015] 2. This caliper, used to measure the thickness of screw heads, uses a support mechanism and other components to guide the pressing plate as it descends smoothly until it contacts the top surface of the screw head. The spring in the support mechanism is compressed, while the sliding cylinder slides within the fixed cylinder, ensuring that the pressing plate remains horizontal at all times. After the test is completed, the pressing plate is released, and the spring force pushes the sliding cylinder upward to reset, causing the pressing plate to return to its initial position. The screw to be tested is then removed from the inclined groove, completing a single test. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the support plate in this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the extrusion plate in this utility model;

[0020] Figure 4 This is a cross-sectional view of the fixed cylinder in this utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the shielding mechanism in this utility model.

[0022] In the diagram: 1. Support plate; 2. Inclined groove; 3. Extrusion plate; 4. Support mechanism; 401. Fixed cylinder; 402. Sliding cylinder; 403. Spring; 404. Sleeve; 5. Laser emitter; 6. Shielding mechanism; 601. Shielding plate; 602. Round hole; 603. Fixed plate; 604. Fixed rod; 7. Display panel; 8. Support rod; 9. Pressing plate. 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] like Figure 1-5As shown, this utility model provides a technical solution: a caliper for measuring the thickness of screw heads, including a support plate 1, with a groove 2 on the inner wall of the support plate 1 to clamp screws of different sizes; a pressing plate 3 is arranged above the support plate 1, and a support mechanism 4 is arranged between the pressing plate 3 and the support plate 1 to allow the pressing plate 3 to move up and down; a laser emitter 5 is installed on the upper surface of the pressing plate 3, a shielding mechanism 6 is arranged on the inner wall of the support plate 1, and a display plate 7 is fixedly connected to the side of the support plate 1. In use, the screw can be clamped into the groove 2, the width of which gradually decreases from the outside to the inside, thus accommodating screws of different thicknesses and increasing applicability. During measurement, by pressing down the pressing plate 3, the lower surface of the pressing plate 3 abuts against the screw head. On the upper surface, the distance between the extrusion plate 3 and the support plate 1 is the thickness of the screw head. During the downward movement of the extrusion plate 3, the stability of the extrusion plate 3 when sliding up and down is increased by four support mechanisms 4, which prevents the extrusion plate 3 from shifting or tilting, and keeps the extrusion plate 3 parallel to the support plate 1 throughout the process. At the same time, the extrusion plate 3 will drive the laser emitter 5 on it to move synchronously, causing the laser emitter 5 to move downward. The laser emitter 5 emits laser light that shines on the shielding mechanism 6. When the screw thickness is not up to standard, the shielding mechanism 6 blocks the light. When the screw thickness is up to standard, the laser passes through the shielding mechanism 6 and shines on the display plate 7. The quality of the screw can be determined by observing whether there is a light spot on the display plate 7, without the need to compare the scale, thus increasing the efficiency of use.

[0025] A support rod 8 is fixedly installed on one side of the support plate 1, and a pressing plate 9 is fixedly connected to one side of the extrusion plate 3. The support rod 8 is used to facilitate gripping and fix the support plate 1. When in use, the pressing plate 9 can be pressed down to drive the extrusion plate 3 to move downward, thereby performing measurement. When in use, the support plate 1 can also be fixed to the table.

[0026] The support mechanism 4 includes a fixed cylinder 401, the lower end and the upper end of which are fixedly connected to the support plate 1. A sliding cylinder 402 is slidably connected to the inner wall of the fixed cylinder 401. The sliding cylinder 402 can slide inside the fixed cylinder 401 to change the height of the sliding cylinder 402.

[0027] A spring 403 is fixedly connected to the inner wall of the fixed cylinder 401. The upper end of the spring 403 is fixedly connected to the sliding cylinder 402. The spring 403 provides an upward elastic force to the sliding cylinder 402 so that when the external force is removed, the sliding cylinder 402 can move upward to reset, thereby driving the pressing plate 3 to reset, so that the screw can be removed.

[0028] A sleeve 404 is fixedly connected to the upper surface of the extrusion plate 3. The inner wall of the sleeve 404 is fixedly connected to the sliding cylinder 402. The extrusion plate 3 and the sliding cylinder 402 are connected together through the sleeve 404. The sleeve 404 is used to increase the contact area with the sleeve 404 to prevent the extrusion plate 3 and the sliding cylinder 402 from cracking, which would cause the extrusion plate 3 to tilt.

[0029] The shielding mechanism 6 includes a shielding plate 601. The outer surface of the shielding plate 601 is slidably connected to the support plate 1. The inner wall of the shielding plate 601 has a circular hole 602. During measurement, if the measurement is qualified, the laser emitted by the laser emitter 5 will pass directly through the circular hole 602. Otherwise, it will be blocked.

[0030] A fixing plate 603 is fixedly connected to the lower surface of the shielding plate 601. A fixing rod 604 is threadedly connected to the inner wall of the fixing plate 603. The end of the fixing rod 604 is rotatably connected to the support plate 1. By turning the fixing rod 604, the fixing plate 603 can be moved up and down, thereby adjusting the height of the shielding plate 601. Before testing, a qualified screw can be placed on the support plate 1 to adjust the height of the shielding plate 601. When the laser passes through the round hole 602, the shielding plate 601 is fixed to facilitate the testing of screw heads of different thicknesses.

[0031] Working principle: Before use, take a standard screw of known thickness and place it in the inclined groove 2. Manually press down the pressing plate 9 to drive the extrusion plate 3 to move downward until the bottom surface of the extrusion plate 3 is in complete contact with the top surface of the screw head. At this time, the laser emitter 5 descends synchronously with the extrusion plate 3 to the corresponding height and emits a laser beam. Rotate the fixing rod 604 to drive the fixing plate 603 and the shielding plate 601 to move up and down until the laser beam just passes through the round hole 602 on the shielding plate 601 and forms a light spot on the display panel 7. Stop rotating the fixing rod 604, lock the current position of the shielding plate 601, and complete the calibration.

[0032] In practical use, the screw to be tested is placed in the inclined groove 2. The gradient width design of the inclined groove 2 automatically adapts to screws of different diameters, ensuring that the bottom surface of the screw head is in close contact with the top surface of the support plate 1. Press down the pressing plate 9, and the extrusion plate 3 descends smoothly under the guidance of the support mechanism 4 until it contacts the top surface of the screw head. The spring 403 in the support mechanism 4 is compressed, and at the same time, the sliding cylinder 402 slides in the fixed cylinder 401, ensuring that the extrusion plate 3 always remains horizontal. If the thickness of the screw head to be tested is consistent with that of the standard screw, the laser beam will accurately pass through the round hole 602 and form a clear light spot on the display plate 7. If the screw head is too thick or too thin, the extrusion plate 3 will descend too far or too much, and the laser beam will be blocked by the shielding plate 601, and there will be no light spot on the display plate 7. The quality of the screw can be identified simply by observing whether there is a light spot on the display plate 7, without the need to compare the scale, thus increasing the efficiency of use.

[0033] After the test is completed, release the pressing plate 9. The elastic force of the spring 403 pushes the sliding cylinder 402 upward to reset, which in turn drives the pressing plate 3 back to the initial position. The screw to be tested is then removed from the inclined groove 2, completing a single test. Repeating the above steps allows for rapid batch testing of multiple screws. The laser beam passes through the circular hole 602 to quickly determine whether the screw is qualified or unqualified. No manual reading is required, and a single test only takes 3-5 seconds. There is no need to read the scale value, which significantly improves the efficiency of batch testing.

[0034] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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 this utility model.

[0035] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A caliper for measuring the thickness of screw heads, comprising a support plate (1), characterized in that: The inner wall of the support plate (1) is provided with a slanted groove (2) to clamp screws of different sizes; An extrusion plate (3) is provided above the support plate (1), and a support mechanism (4) is provided between the extrusion plate (3) and the support plate (1) to enable the extrusion plate (3) to move up and down. A laser emitter (5) is installed on the upper surface of the extrusion plate (3), a shielding mechanism (6) is provided on the inner wall of the support plate (1), and a display plate (7) is fixedly connected to the side of the support plate (1).

2. The caliper for measuring the thickness of screw heads according to claim 1, characterized in that: A support rod (8) is fixedly installed on one side of the support plate (1), and a pressing plate (9) is fixedly connected to one side of the pressing plate (3).

3. The caliper for measuring the thickness of screw heads according to claim 1, characterized in that: The support mechanism (4) includes a fixed cylinder (401), the lower end and the upper end of the fixed cylinder (401) are fixedly connected to the support plate (1), and a sliding cylinder (402) is slidably connected to the inner wall of the fixed cylinder (401).

4. The caliper for measuring the thickness of screw heads according to claim 3, characterized in that: A spring (403) is fixedly connected to the inner wall of the fixed cylinder (401), and the upper end of the spring (403) is fixedly connected to the sliding cylinder (402).

5. The caliper for measuring the thickness of screw heads according to claim 4, characterized in that: A sleeve (404) is fixedly connected to the upper surface of the extrusion plate (3), and the inner wall of the sleeve (404) is fixedly connected to the sliding cylinder (402).

6. The caliper for measuring the thickness of screw heads according to claim 1, characterized in that: The shielding mechanism (6) includes a shielding plate (601), the outer surface of which is slidably connected to the support plate (1), and the inner wall of the shielding plate (601) is provided with a circular hole (602).

7. The caliper for measuring the thickness of screw heads according to claim 6, characterized in that: A fixing plate (603) is fixedly connected to the lower surface of the shielding plate (601), and a fixing rod (604) is threadedly connected to the inner wall of the fixing plate (603). The end of the fixing rod (604) is rotatably connected to the support plate (1).

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