A gauge for testing arc screws with a slanted positioning device

Abstract

This utility model discloses a circular arc screw inspection gauge with a slanted push positioning device, relating to the field of screw inspection technology. It includes a base plate, a fixing structure, a positioning structure, and a length inspection structure. First, the mounting plate of the fixing structure is aligned with the connecting grooves on both sides of the opening on the fixing frame. Then, a screw is threaded through the mounting plate and connected to the connecting groove, firmly fixing the fixing block to the fixing frame. Simultaneously, the first fixing groove of the fixing block is aligned with the center of the opening, providing a reference for fixing one end of the screw. Then, the operator holds the pull rod on the push rod and pulls it away from the fixing structure, causing the two push rods to move synchronously. The push rods drive the movable block to slide in the same direction. The two slides at the bottom of the movable block slide smoothly along the sliding grooves on the bottom wall of the fixing frame, preventing the movable block from shifting. At the same time, the spring sleeved on the push rod is compressed to store elastic potential energy. The end of the push rod away from the movable block slides along the moving groove on the inclined surface of the slanted block, thus ensuring the linearity of the push rod's movement.

Description

Technical Field

[0001] This utility model relates to the field of screw inspection technology, specifically a circular arc screw inspection gauge with a slanted push positioning device. Background Technology

[0002] Arc screws are special mechanical fasteners made of metals such as carbon steel, stainless steel, and aluminum alloy. Their core feature is an arc-shaped design on the head or shank surface (e.g., a spherical head, an arc transition surface in the middle of the shank, or an arc contour on the contact end). They require a nut or pre-drilled threaded hole for use. Some arc structures also serve positioning and connection functions. Compared to ordinary flat-end or pointed screws, their arc surface design reduces stress concentration, minimizes damage to the surface of the connected parts, and improves assembly fit. The core function of these screws includes: securing the fastener through a larger contact area. The force is evenly distributed across the surface of the connector, preventing excessive local pressure that could lead to deformation and damage (especially suitable for brittle materials or thin sheets). The rounded surface, free of sharp edges, prevents scratches on the connector surface and installers (suitable for applications with high aesthetic requirements). Partially rounded sections of the screw can mate with the rounded grooves of the connector for assembly guidance, ensuring precise alignment of the screw with the mounting hole. This also reduces stress concentration and improves fatigue resistance under vibration, preventing screw loosening and breakage. Its applications are wide-ranging, including furniture and home furnishing for splicing wooden / panel furniture and fixing home hardware, as well as electronics and home appliances. This technology is used in various fields, including: assembling appliance casings and connecting internal components and circuit board mounting brackets; connecting automotive interior parts and fixing non-load-bearing chassis components in the automotive and transportation sectors; assembling medical device casings and surgical instruments (the smooth, rounded surface facilitates cleaning and disinfection); and connecting lightweight machinery casings, protective covers, and plastic molds in the machinery and industrial sectors. It is worth noting that the length accuracy of rounded screws directly affects the final assembly result, but traditional inspection methods have significant drawbacks: Firstly, when measuring manually with calipers, the curved structure of the screw easily leads to unstable grip and positioning deviations, and manual readings inevitably introduce visual errors, resulting in both low inspection accuracy and efficiency, and potentially scratching the screw surface during operation. Secondly, most simple inspection fixtures on the market are fixed structures and cannot accommodate different specifications of rounded screws. Changing the inspection model requires repeated disassembly and reassembly, which is not only cumbersome but also prone to damaging the screws. Therefore, those skilled in the art provide a rounded screw inspection gauge with a slanted push positioning device to solve the problems mentioned in the background. Utility Model Content

[0003] The purpose of this invention is to provide a circular arc screw inspection gauge with a slanted push positioning device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A circular arc screw inspection gauge with a slanted positioning device includes a base plate, a fixing structure, a positioning structure, and a length detection structure. A fixing frame is fixedly connected to one side of the top of the base plate, a slanted block is fixedly connected to one side of the fixing frame, a fixing bracket is fixedly connected to the top of the slanted block, a sliding groove is provided on one side of the fixing bracket, and the length detection structure is slidably connected in the sliding groove. A fixing structure is detachably connected to the side of the fixing frame away from the slanted block, and a positioning structure is slidably connected to the bottom wall of the fixing frame.

[0005] As a further embodiment of this utility model: the fixing structure includes a fixing block, a first fixing groove and a mounting plate, the mounting plate is fixedly connected to both sides of the fixing block, and the first fixing groove is opened on one side of the fixing block.

[0006] As a further embodiment of this utility model: the positioning structure includes a movable block, a second fixing groove, a spring, a push rod, a slide, and a pull rod. The movable block has a second fixing groove on one side, and two push rods are fixedly connected to the other side of the movable block. Each push rod is fitted with a spring. The side of the push rod away from the movable block passes through one side of the fixing frame and is slidably connected to it. Each push rod is fixedly connected to a pull rod, and two slides are fixedly connected to the bottom of the movable block.

[0007] As a further embodiment of this utility model: the length detection structure includes a motor, a sliding frame, an index block, a lead screw, a first pressure plate, a telescopic rod, and a second pressure plate. The index blocks are fixedly connected to both sides of the second pressure plate, and two telescopic rods are fixedly connected to one side of the second pressure plate.

[0008] As a further embodiment of this utility model: the other side of the telescopic rod is fixedly connected by a first pressure plate, and a sliding frame corresponding to the sliding groove is fixedly connected to the side of the second pressure plate away from the telescopic rod. The sliding frame is slidably connected to the sliding groove.

[0009] As a further embodiment of this utility model: a lead screw is threadedly connected to the sliding frame, the top of the lead screw passes through the top of the fixed frame and is fixedly connected to the power output shaft of the motor, and the lead screw is rotatably connected to the fixed frame.

[0010] As a further embodiment of this utility model: an entrance is provided at the top center of the fixed frame, an opening is provided on the side of the fixed frame away from the inclined block, and connecting grooves corresponding to the mounting plates on the fixed structure are provided on both sides of the opening, and the connecting grooves and the mounting plates are connected by screw threads.

[0011] As a further embodiment of this utility model: the bottom wall of the fixed frame is provided with two sliding grooves corresponding to the slides on the positioning structure, and the sliding grooves are slidably connected to the slides; the inclined surface of the inclined block is provided with two moving grooves corresponding to the push rods, and the moving grooves are slidably connected to the push rods; and scales are fixedly connected to both sides of the fixed frame.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. In use, first, align the mounting plate of the fixed structure with the connecting grooves on both sides of the opening, and then use screws to thread through the mounting plate and the connecting grooves to firmly fix the fixing block on the fixed frame. At the same time, ensure that the first fixing groove of the fixing block is aligned with the center of the opening to provide a reference for fixing one end of the screw. 2. Then the operator holds the pull rod on the push rod and pulls it away from the fixed structure, which in turn drives the two push rods to move synchronously. The push rods drive the movable block to slide in the same direction. The two slides at the bottom of the movable block slide smoothly along the sliding grooves on the bottom wall of the fixed frame to prevent the movable block from deviating. At the same time, the spring sleeved on the push rod is compressed to store elastic potential energy. The end of the push rod away from the movable block slides along the moving groove on the inclined surface of the inclined block to ensure the linearity of the push rod movement. Next, the arc screw to be tested is placed into the fixed frame through the entrance at the top center of the fixed frame. The position of the arc screw is adjusted so that one end is aligned with the first fixing groove of the fixed block and embedded. Then, the pull rod is released, and the spring releases its elastic potential energy to push the push rod back. The movable block moves towards the fixed structure with the push rod until the second fixing groove of the movable block is precisely engaged with the other end of the arc screw. The arc screw is positioned and fixed by the first fixing groove and the second fixing groove, thereby preventing loosening and displacement during testing. 3. After the arc screw is fixed, first pull the first pressure plate by extending and retracting the telescopic rod to adjust the first pressure plate to be directly above the arc screw, ensuring that the pressure can be evenly applied to the arc screw during subsequent testing. Then, start the motor of the length detection structure. Its power output shaft drives the lead screw to rotate. Because the lead screw is threadedly connected to the sliding frame and the sliding frame is in sliding fit with the sliding groove, the rotation of the lead screw is converted into the sliding frame moving vertically downward along the sliding groove. The sliding frame drives the second pressure plate to descend synchronously, and the first pressure plate also moves down. The index blocks on both sides of the second pressure plate also move down synchronously, corresponding to the scales on both sides of the fixed frame. When the bottom of the first pressure plate contacts the top of the arc screw and cannot move down, observe the scale readings aligned with the bottom of the index blocks to read the length data of the arc screw, thus completing the test. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a circular arc screw inspection gauge with a slanted push positioning device.

[0014] Figure 2 This is a schematic diagram of the internal structure of the fixed frame in a circular arc screw inspection gauge with a slanted push positioning device.

[0015] Figure 3 This is a schematic diagram of the fixed frame structure in a gauge for detecting arc screws with a slanted positioning device.

[0016] Figure 4This is a schematic diagram of the fixing structure in a test gauge for an arc screw with a slanted push positioning device.

[0017] Figure 5 This is a schematic diagram of the positioning structure in a gauge for detecting arc screws with a slanted positioning device.

[0018] Figure 6 This is a schematic diagram of a length detection structure for an arc screw with a slanted push positioning device.

[0019] In the diagram: 1. Base plate; 2. Fixed frame; 3. Inclined block; 4. Fixed bracket; 5. Fixed structure; 51. Fixed block; 52. First fixed groove; 53. Mounting plate; 6. Positioning structure; 61. Movable block; 62. Second fixed groove; 63. Spring; 64. Push rod; 65. Slide; 66. Pull rod; 7. Length detection structure; 71. Motor; 72. Slide; 73. Index block; 74. Lead screw; 75. First pressure plate; 76. Telescopic rod; 77. Second pressure plate; 8. Inlet; 9. Scale; 10. Sliding groove; 11. Moving groove; 12. Opening; 13. Slide groove; 14. Connecting groove. Detailed Implementation

[0020] 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.

[0021] Example 1 Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6This embodiment provides a circular arc screw inspection gauge with a slanted positioning device, including a base plate 1, a fixing structure 5, a positioning structure 6, and a length detection structure 7. A fixing frame 2 is fixedly connected to one side of the top of the base plate 1, a slanted block 3 is fixedly connected to one side of the fixing frame 2, a fixing bracket 4 is fixedly connected to the top of the slanted block 3, a sliding groove 10 is provided on one side of the fixing bracket 4, and the length detection structure 7 is slidably connected within the sliding groove 10. The fixing structure 5 is detachably connected to the side of the fixing frame 2 away from the slanted block 3, and the positioning structure 6 is slidably connected to the bottom wall of the fixing frame 2. An entrance 8 is provided in the middle of the top of the fixing frame 2, and an opening 12 is provided on the side of the fixing frame 2 away from the slanted block 3. Connecting grooves 14, corresponding to the mounting plates 53 on the fixing structure 5, are provided on both sides of the opening 12, and the connecting grooves 14 and the mounting plates 53 are connected by screw threads. The bottom wall of the 2nd section has two sliding grooves 13 corresponding to the slide 65 on the positioning structure 6, and the sliding grooves 13 are slidably connected to the slide 65. The inclined block 3 has two moving grooves 11 corresponding to the push rod 64 on one side of the inclined surface, and the moving grooves 11 are slidably connected to the push rod 64. The fixed frame 4 has scales 9 fixedly connected to both sides. The fixed structure 5 includes a fixed block 51, a first fixed groove 52 and a mounting plate 53. The fixed block 51 has mounting plates 53 fixedly connected to both sides. The fixed block 51 has a first fixed groove 52 on one side. The mounting plate 53 is aligned with the connecting grooves 14 on both sides of the opening 12. Then, screws are threaded through the mounting plate 53 and connected to the connecting grooves 14 to make the fixed block 51 firmly fixed on the fixed frame 2. At the same time, the first fixed groove 52 of the fixed block 51 is aligned with the center of the opening 12 to provide a reference for fixing one end of the screw.

[0022] Example 2 Reference Figure 1-6This embodiment is based on the previous embodiment, but differs in that the positioning structure 6 includes a movable block 61, a second fixing groove 62, a spring 63, a push rod 64, a slide 65, and a pull rod 66. The movable block 61 has a second fixing groove 62 on one side, and two push rods 64 are fixedly connected to the other side of the movable block 61. Each push rod 64 is fitted with a spring 63. The side of the push rod 64 away from the movable block 61 passes through one side of the fixed frame 2 and is slidably connected to it. Each push rod 64 is fixedly connected to a pull rod 66. Two slides 65 are fixedly connected to the bottom of the movable block 61. When the operator holds the pull rod 66 on the push rod 64 and pulls it away from the fixed structure 5, the two push rods 64 move synchronously, causing the movable block 61 to slide in the same direction. The two slides 65 at the bottom of the movable block 61 slide along the fixed structure 5. The sliding groove 13 on the bottom wall of frame 2 slides smoothly to prevent the movable block 61 from shifting. At the same time, the spring 63 sleeved on the push rod 64 is compressed and stores elastic potential energy. The end of the push rod 64 away from the movable block 61 slides along the moving groove 11 on the inclined surface of the inclined block 3 to ensure the linearity of the push rod 64. Then, the arc screw to be tested is placed into the fixed frame 2 through the entrance 8 at the top center of the fixed frame 2. The position of the arc screw is adjusted so that one end is directly opposite the first fixing groove 52 of the fixed block 51 and embedded. Then, the pull rod 66 is released, and the spring 63 releases elastic potential energy to push the push rod 64 back. The movable block 61 moves with the push rod 64 towards the fixed structure 5 until the second fixing groove 62 of the movable block 61 is precisely engaged with the other end of the arc screw. The arc screw is positioned and fixed by the first fixing groove 52 and the second fixing groove 62, thereby preventing loosening and displacement during testing.The length detection structure 7 includes a motor 71, a sliding frame 72, an index block 73, a lead screw 74, a first pressure plate 75, a telescopic rod 76, and a second pressure plate 77. The index blocks 73 are fixedly connected to both sides of the second pressure plate 77. Two telescopic rods 76 are fixedly connected to one side of the second pressure plate 77, and the other side of the telescopic rods 76 is fixedly connected to the first pressure plate 75. A sliding frame 72, corresponding to the sliding groove 10, is fixedly connected to the side of the second pressure plate 77 away from the telescopic rods 76. The sliding frame 72 is slidably connected to the sliding groove 10. A lead screw 74 is threaded onto the sliding frame 72. The top of the lead screw 74 passes through the top of the fixed frame 4 and is fixedly connected to the power output shaft of the motor 71. The lead screw 74 is rotatably connected to the fixed frame 4. After being fixed with an arc screw, the first pressure plate 75 is first pulled by the extension and retraction of the telescopic rod 76. The first pressure plate 75 is adjusted to be directly above the arc screw to ensure that the pressure is evenly applied to the arc screw during subsequent testing. Then, the motor 71 of the length detection structure 7 is started, and its power output shaft drives the lead screw 74 to rotate. Because the lead screw 74 is threadedly connected to the sliding frame 72, and the sliding frame 72 is in sliding engagement with the sliding groove 10, the rotation of the lead screw 74 is converted into the sliding frame 72 moving vertically downwards along the sliding groove 10. The sliding frame 72 drives the second pressure plate 77 to descend synchronously, and the first pressure plate 75 also moves downwards accordingly. The index blocks 73 on both sides of the second pressure plate 77 also move downwards synchronously, corresponding to the scales 9 on both sides of the fixed frame 4. When the bottom of the first pressure plate 75 contacts the top of the arc screw and cannot move further, the length data of the arc screw can be read by observing the scale 9 aligned with the bottom of the index block 73, thus completing the test.

[0023] 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.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A circular arc screw detection gauge with inclined pushing positioning device, comprising a base plate (1), a fixing structure (5), a positioning structure (6) and a length detection structure (7), characterized in that, The bottom plate (1) is fixedly connected to a fixed frame (2) on one side of the top, and a wedge (3) is fixedly connected to one side of the fixed frame (2). A fixed bracket (4) is fixedly connected to the top of the wedge (3). A sliding groove (10) is opened on one side of the fixed bracket (4). A length detection structure (7) is slidably connected in the sliding groove (10). A fixed structure (5) is detachably connected to the side of the fixed frame (2) away from the wedge (3). A positioning structure (6) is slidably connected to the bottom wall of the fixed frame (2).

2. The circular arc screw detection gauge with an inclined pushing positioning device according to claim 1, characterized in that, The fixing structure (5) includes a fixing block (51), a first fixing groove (52) and a mounting plate (53). The mounting plate (53) is fixedly connected to both sides of the fixing block (51), and the first fixing groove (52) is opened on one side of the fixing block (51).

3. The circular arc screw detection gauge with an inclined pushing positioning device according to claim 1, characterized in that, The positioning structure (6) includes a movable block (61), a second fixing groove (62), a spring (63), a push rod (64), a slide (65), and a pull rod (66). The movable block (61) has a second fixing groove (62) on one side, and two push rods (64) are fixedly connected to the other side of the movable block (61). Each push rod (64) is fitted with a spring (63). The side of the push rod (64) away from the movable block (61) passes through one side of the fixed frame (2) and is slidably connected to it. Each push rod (64) is fixedly connected with a pull rod (66). Two slides (65) are fixedly connected to the bottom of the movable block (61).

4. The circular arc screw detection gauge with an inclined pushing positioning device according to claim 1, characterized in that, The length detection structure (7) includes a motor (71), a sliding frame (72), an index block (73), a lead screw (74), a first pressure plate (75), a telescopic rod (76), and a second pressure plate (77). The index blocks (73) are fixedly connected to both sides of the second pressure plate (77), and two telescopic rods (76) are fixedly connected to one side of the second pressure plate (77).

5. The circular arc screw detection gauge with inclined pushing positioning device according to claim 4, characterized in that, The telescopic rod (76) is fixedly connected to the other side by the first pressure plate (75), and the second pressure plate (77) is fixedly connected to the side away from the telescopic rod (76) by a sliding frame (72) corresponding to the sliding groove (10), and the sliding frame (72) is slidably connected to the sliding groove (10).

6. The circular arc screw detection gauge with inclined pushing positioning device according to claim 4, characterized in that, The sliding frame (72) is threaded with a lead screw (74), the top of the lead screw (74) passes through the top of the fixed frame (4) and is fixedly connected to the power output shaft of the motor (71). The lead screw (74) is rotatably connected to the fixed frame (4).

7. The circular arc screw detection gauge with an inclined pushing positioning device according to claim 1, characterized in that, The fixed frame (2) has an entrance (8) at the top center and an opening (12) on the side away from the inclined block (3). The opening (12) has connecting grooves (14) on both sides corresponding to the mounting plate (53) on the fixed structure (5). The connecting grooves (14) and the mounting plate (53) are connected by screw threads.

8. A circular arc screw inspection gauge with a slanted push positioning device according to claim 1, characterized in that, The bottom wall of the fixed frame (2) has two sliding grooves (13) corresponding to the slide (65) on the positioning structure (6), and the sliding grooves (13) are slidably connected to the slide (65). The inclined block (3) has two moving grooves (11) corresponding to the push rod (64) on one side of the inclined surface, and the moving grooves (11) are slidably connected to the push rod (64). The fixed frame (4) has a scale (9) fixedly connected to both sides.

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