A size detection device for mechanical parts

Abstract

The utility model discloses a size detection equipment for mechanical parts relates to size measurement equipment field, including feeding mechanism, be provided with detection mechanism on the feeding mechanism, and the rear side of feeding mechanism is provided with the unloading mechanism, and the below of detection mechanism is provided with the grabbing mechanism, and the grabbing mechanism includes the centring clamping subassembly, and two translation plates are installed on the centring clamping subassembly, and the fixed swing plate is rotatively connected with the upper end of translation plate, and the fixed swing plate one side is provided with the translation swing plate, and a plurality of clamps are slidably connected on the translation swing plate, and a plurality of connecting rods are hinged on the fixed swing plate, and the other end of connecting rod is hinged with the translation swing plate, and a plurality of springs are fixed between the clamp and the fixed swing plate. Beneficial effects lie in: the process of moving and clamping the shaft to be measured in the translation swing plate, the distance between the fixed swing plate and the translation swing plate reduces, makes the connecting rod push clamp and clamps the shaft to be measured, and then the fixed swing plate can rotate, so that the detection mechanism can detect the roundness of the shaft to be measured, and the accuracy of the result is guaranteed through the centring clamping.

Description

Technical Field

[0001] This utility model relates to the field of dimensional measuring equipment, and in particular to a dimensional inspection device for mechanical parts. Background Technology

[0002] Dimensional inspection of mechanical parts is a core aspect of quality control in the mechanical manufacturing process. Its purpose is to determine whether the actual dimensions of the parts meet the dimensional tolerance requirements specified in the design drawings by measuring the actual dimensions of the parts, thereby ensuring the interchangeability, assembly accuracy, and product performance of the parts. As the most common mechanical parts, the measurement of the outer diameter of shaft parts, especially stepped shafts, directly determines the product quality.

[0003] For example, patent document CN220153534U discloses a mechanical part dimension measuring device, including a test box with one side open. A door, rotatably mounted on the side of the test box, seals the opening. Inside the test box is a positioning assembly for positioning the mechanical part. The positioning assembly includes a first bracket and a second bracket. A clamping plate is provided on the side of the first bracket, and an adjustable positioning plate is provided on the side of the second bracket. This equipment simulates the working environment of the mechanical part, causing it to deform due to thermal expansion and contraction. This allows for the measurement of the mechanical part's dimensions in a real-world environment, facilitating the manufacture of appropriately sized mechanical parts based on their deformation, reducing the failure rate of mechanical equipment. Furthermore, this measuring device can effectively position the mechanical part during measurement, and the rotation method facilitates the detection of dimensional information at different locations on the mechanical part.

[0004] In existing technologies, the inspection of the outer roundness of shaft parts is either cumbersome or prone to significant errors. To improve the accuracy of roundness inspection of shaft parts, a dimensional inspection device with automatic centering and clamping capabilities is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a dimensional inspection device for mechanical parts in order to solve the above-mentioned problems.

[0006] This utility model achieves the above objectives through the following technical solutions:

[0007] A dimensional inspection device for mechanical parts includes a feeding mechanism, an inspection mechanism mounted on the feeding mechanism, an unloading mechanism mounted behind the feeding mechanism, and a gripping mechanism below the inspection mechanism. The gripping mechanism includes a cylinder, a centering clamping assembly mounted on the cylinder output end, two translation plates mounted on the centering clamping assembly, a fixed rotating plate rotatably connected to the upper end of the translation plates, a telescopic support rod fixedly connected to the center of one side of the fixed rotating plate, and a translation rotating plate fixedly connected to the other end of the telescopic support rod. The translation rotating plate has a plurality of circumferentially evenly arranged linear grooves, and grippers are slidably connected to the linear grooves of the translation rotating plate. A plurality of circumferentially evenly arranged connecting rods are hinged to the fixed rotating plate, with the other end of the connecting rods hinged to the translation rotating plate. A plurality of circumferentially evenly arranged springs are fixedly connected between the grippers and the fixed rotating plate.

[0008] Preferably, the centering clamping assembly includes a lifting bracket fixedly connected to the output end of the cylinder, a bidirectional lead screw rotatably connected to the lifting bracket, a clamping motor fixedly connected to one side of the lifting bracket, the output end of the clamping motor fixedly connected to the bidirectional lead screw, a limit rod fixedly connected to the upper end of the lifting bracket, the lifting bracket being threadedly connected to two translation plates, and the translation plates being slidably connected to the limit rod.

[0009] Preferably, the feeding mechanism includes a feeding bracket, with symmetrically arranged rotating shafts rotatably connected to the front and rear ends of the feeding bracket. Symmetrically arranged sprockets are fixedly connected to the left and right ends of the rotating shafts. Chains are installed on the front and rear sprockets, and V-shaped support blocks are fixedly connected to the chains. A feeding motor is fixedly connected to one side of the feeding bracket, and the output end of the feeding motor is fixedly connected to a rotating shaft. The shaft to be tested is placed on the left and right V-shaped support blocks. A cylinder is fixedly connected to the lower end of the feeding bracket.

[0010] Preferably, the inspection mechanism includes a gantry bracket fixedly connected to the feeding bracket, a horizontal lead screw rotatably connected to the top of the gantry bracket, an inspection motor fixedly connected to one side of the top of the gantry bracket, the output end of the inspection motor fixedly connected to the horizontal lead screw, a vision inspection component threadedly connected to the horizontal lead screw, and the vision inspection component slidably connected to the gantry bracket.

[0011] Preferably, a drive gear is fixedly connected to the other end of the horizontal lead screw, and a driven gear is rotatably connected to the gantry bracket. The driven gear meshes with the drive gear. The diameter of the drive gear is larger than the diameter of the driven gear. A drive wheel is fixedly connected to one end of the inner side of the driven gear, and a driven wheel is fixedly connected to the outer end of the fixed rotating plate. The driven wheel and the drive wheel can be closely attached.

[0012] Preferably, the unloading mechanism includes a receiving bracket placed behind the feeding bracket, a qualified box placed on the upper end of the receiving bracket, a waste box placed on the receiving bracket, the qualified box being located above and behind the waste box, an L-shaped bracket fixedly connected to the front end of the receiving bracket, a deflection slide rail hinged to the L-shaped bracket, the front end of the deflection slide rail being located between two sprockets, a shift motor fixedly connected to one side of the chain, and the output end of the shift motor being fixedly connected to the deflection slide rail.

[0013] The beneficial effects are as follows: the centering clamping assembly moves the two translational rotating plates, which then come to a stop after contacting both ends of the shaft to be measured. Subsequently, the fixed rotating plate continues to move, thus reducing the distance between the fixed rotating plate and the translational rotating plate. This causes the connecting rod to push the gripper towards the center, achieving center positioning and clamping of the shaft to be measured. In the next step, the cylinder drives the shaft to be measured, which is clamped by the gripper, to be lifted into the detection mechanism. Then, the fixed rotating plate can rotate, allowing the detection mechanism to detect the roundness and diameter of the shaft to be measured. This enables rapid dimensional detection of shaft parts, and the centering clamping ensures the accuracy of the dimensional detection.

[0014] The additional technical features and advantages of this utility model will become more apparent from the following description, or may be learned through specific practice of this utility model. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a perspective view of a dimensional inspection device for mechanical parts as described in this utility model;

[0017] Figure 2 This is a right view of the dimensional inspection device for mechanical parts described in this utility model;

[0018] Figure 3 This is a front view of a dimensional inspection device for mechanical parts as described in this utility model;

[0019] Figure 4 This is a perspective view showing the relative positions of the feeding mechanism and the detection mechanism of a dimensional detection device for mechanical parts according to this utility model.

[0020] Figure 5 This is a three-dimensional structural view of the gripping mechanism of a dimensional inspection device for mechanical parts according to the present invention;

[0021] Figure 6 This is a perspective view of the relative positions of the translational rotating plate and the gripper of the dimensional inspection device for mechanical parts described in this utility model;

[0022] Figure 7 This is a front sectional view of the translational rotating plate and gripper of the dimensional inspection device for mechanical parts described in this utility model;

[0023] Figure 8 This is a three-dimensional structural view of the unloading mechanism of a dimensional inspection device for mechanical parts as described in this utility model.

[0024] The annotations in the attached figures are explained as follows:

[0025] 101. Feeding bracket; 102. Rotating shaft; 103. Sprocket; 104. Chain; 105. Feeding motor; 106.

[0026] V-shaped support block; 107. Shaft to be tested; 201. Portal bracket; 202. Detection motor; 203. Horizontal lead screw; 204. Vision inspection component; 205. Driving gear; 206. Driven gear; 207. Drive wheel; 301. Cylinder; 302. Lifting bracket; 303. Clamping motor; 304. Limiting rod; 305. Bidirectional lead screw; 306. Translation plate; 307. Fixed rotating plate; 308. Driven wheel; 309. Translation rotating plate; 310. Connecting rod; 311. Hand; 312. Spring; 313. Telescopic support rod; 401. Receiving bracket; 402. Scrap bin; 403. Qualified bin; 404. L-shaped bracket; 405. Deflection slide rail; 406. Shifting motor. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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.

[0029] The present invention will be further described below with reference to the accompanying drawings:

[0030] like Figures 1-8As shown, a dimensional inspection device for mechanical parts includes a feeding mechanism, an inspection mechanism mounted on the feeding mechanism, an unloading mechanism mounted behind the feeding mechanism, and a gripping mechanism below the inspection mechanism. The gripping mechanism includes a cylinder 301, with a centering clamping assembly mounted on the output end of the cylinder 301. Two translation plates 306 are mounted on the centering clamping assembly, and a fixed rotating plate 307 is rotatably connected to the upper end of the translation plates 306. A telescopic support rod 313 is fixedly connected to the center of one side of the fixed rotating plate 307. 13. A translational rotating plate 309 is fixedly connected to the other end. The telescopic support rod 313 ensures that the translational rotating plate 309 and the fixed rotating plate 307 are coaxial. The translational rotating plate 309 is provided with several circumferentially evenly arranged straight grooves. A clamp 311 is slidably connected to the straight grooves of the translational rotating plate 309. Several circumferentially evenly arranged connecting rods 310 are hinged to the fixed rotating plate 307. The connecting rods 310 are in a contracted and inclined state from the outside to the inside. The other end of the connecting rods 310 is hinged to the translational rotating plate 309. A plurality of circumferentially evenly arranged springs 312 are fixedly connected between the clamp 311 and the fixed rotating plate 307. After the feeding mechanism conveys the shaft to be tested 107 to the bottom of the detection mechanism, the centering clamping assembly drives the two translation plates 306 to move towards each other. The translation plates 306 drive the fixed rotating plate 307 to move, and the fixed rotating plate 307 drives the translation rotating plate 309 to move. The translation rotating plate 309 comes to a stop after contacting both ends of the shaft to be tested 107. Then the translation plates 306 drive the fixed rotating plate 307 to continue moving, thus fixing... The distance between the rotating plate 307 and the translational rotating plate 309 is reduced, so the connecting rod 310 pushes the gripper 311 to move towards the center. Thus, several grippers 311 can be centered and clamp the shaft 107 to be tested. Next, the cylinder 301 drives the centering clamping assembly to rise, thereby lifting the shaft 107 to be tested, which is clamped by the gripper 311, into the detection mechanism. Then, the fixed rotating plate 307 can rotate. In this way, the detection mechanism can detect the roundness and diameter of the shaft 107 to be tested, thereby realizing the quick dimensional detection of shaft parts.

[0031] The centering clamping assembly includes a lifting bracket 302 bolted to the output end of the cylinder 301. A bidirectional lead screw 305 is rotatably connected to the lifting bracket 302 via bearings. A clamping motor 303 is bolted to one side of the lifting bracket 302. The output end of the clamping motor 303 is fixedly connected to the bidirectional lead screw 305. A limit rod 304 is fixedly connected to the upper end of the lifting bracket 302. The limit rod 304 prevents the translation plate 306 from always remaining vertical during movement. The lifting bracket 302 is threadedly connected to the two translation plates 306. The translation plates 306 are slidably connected to the limit rod 304. The clamping motor 303 drives the bidirectional lead screw 305 to rotate. The bidirectional lead screw 305 drives the translation plates 306 on both sides to move synchronously towards each other through the threaded connection.

[0032] The feeding mechanism includes a feeding bracket 101. The front and rear ends of the feeding bracket 101 are rotatably connected to symmetrically arranged rotating shafts 102 via bearings. Symmetrically arranged sprockets 103 are keyed to the left and right ends of the rotating shafts 102. Chains 104 are mounted on the front and rear sprockets 103. A tensioning wheel or support roller (not shown in the figure) may be installed inside the feeding bracket 101. A V-shaped support block 106 is fixedly connected to the chain 104. A feeding motor 105 is bolted to one side of the feeding bracket 101. The feeding motor 105 is a stepper motor. The output end of 05 is fixedly connected to a rotating shaft 102. The shaft to be tested 107 is placed in the V-shaped grooves on the two left and right V-shaped support blocks 106. The cylinder 301 is fixedly connected to the lower end of the feeding bracket 101. The feeding motor 105 drives the rotating shaft 102 to rotate. The rotating shaft 102 drives the sprocket 103 to rotate. The sprocket 103 drives the chain 104 to rotate. In this way, the chain 104 eventually drives the other rotating shaft 102 to rotate. At the same time, the chain 104 drives several V-shaped support blocks 106 to move in a step-by-step manner. The V-shaped support blocks 106 drive the shaft to be tested 107 to move.

[0033] The inspection mechanism includes a portal frame 201 bolted to the feeding bracket 101. A horizontal lead screw 203 is rotatably connected to the top of the portal frame 201 via a bearing. A detection motor 202 is bolted to one side of the top of the portal frame 201. The output end of the detection motor 202 is fixedly connected to the horizontal lead screw 203. A vision inspection component 204 is threaded onto the horizontal lead screw 203. The vision inspection component 204 is existing technology, and its specific structure will not be described here. The vision inspection component 204 is slidably connected to the portal frame 201. The detection motor 202 drives the horizontal lead screw 203 to rotate, and the horizontal lead screw 203 drives the vision inspection component 204 to move via a threaded connection. In this way, the vision inspection component 204 can identify the dimensions of the entire shaft 107 to be tested and detect whether its dimensions are qualified.

[0034] The other end of the horizontal lead screw 203 is keyed to a drive gear 205. A driven gear 206 is rotatably connected to the gantry bracket 201 via a bearing. The driven gear 206 meshes with the drive gear 205. The diameter of the drive gear 205 is larger than the diameter of the driven gear 206. By setting a large transmission ratio, it is ensured that the shaft under test 107 can rotate multiple times during the inspection process of the vision inspection component 204, thereby improving the inspection accuracy. A drive wheel 207 is fixedly connected to one end of the inner side of the driven gear 206, and a fixed rotating plate 307 is fixedly connected to the outer end. There is a driven wheel 308, which can be closely attached to the drive wheel 207. When the translation plate 306 drives the shaft to be tested 107 to rise to the position, the driven wheel 308 should be closely engaged with the drive wheel 207. Then the horizontal lead screw 203 drives the drive gear 205 to rotate, the drive gear 205 drives the driven gear 206 to rotate, the driven gear 206 drives the drive wheel 207 to rotate, the drive wheel 207 drives the driven wheel 308 to rotate, and the driven wheel 308 drives the fixed rotating plate 307 to rotate, finally realizing the rotation of the shaft to be tested 107.

[0035] The unloading mechanism includes a receiving bracket 401 placed behind the feeding bracket 101. A qualified box 403 is placed on the upper end of the receiving bracket 401, and a waste box 402 is placed on the receiving bracket 401. The qualified box 403 is located above and behind the waste box 402. An L-shaped bracket 404 is fixedly connected to the front end of the receiving bracket 401. A deflection rail 405 is hinged to the L-shaped bracket 404. The front end of the deflection rail 405 is located between two sprockets 103. A shifting motor 406 is fixedly connected to one side of the chain 104. The output end of the shifting motor 406 is fixedly connected to the deflection rail 405. After the gripping mechanism resets, the inspected shaft parts are placed back on the V-shaped support block 106 and move forward with it. When the shaft parts reach the end of the feeding mechanism, they are transferred to the deflection slide rail 405. Based on the previous inspection results, the shifting motor 406 drives the deflection slide rail 405 to deflect. When the result is a qualified product, the rear end of the deflection slide rail 405 points to the qualified box 403. When the result is a defective product, the rear end of the deflection slide rail 405 points to the scrap box 402. This achieves automatic classification of the inspected parts and avoids mixing of qualified and scrap products.

[0036] Working principle: The feeding motor 105 drives the rotating shaft 102 to rotate, which in turn drives the sprocket 103 to rotate. The sprocket 103 then drives the chain 104 to rotate, and so on. The chain 104 eventually drives another rotating shaft 102 to rotate. Simultaneously, the chain 104 drives several V-shaped support blocks 106 to move in a stepping motion. The V-shaped support blocks 106 then drive the shaft to be tested 107 to move. After the shaft to be tested 107 is conveyed to the bottom of the testing mechanism, the clamping motor 303 drives the bidirectional lead screw 305 to rotate. The bidirectional lead screw 305, through a threaded connection, drives the translation plates 306 on both sides to move synchronously in opposite directions. The fixed rotating plate 307 moves, which in turn moves the translational rotating plate 309. The translational rotating plate 309 comes to a stop after contacting both ends of the shaft to be tested 107. Then, the translational plate 306 moves the fixed rotating plate 307 further, reducing the distance between them. This causes the connecting rod 310 to push the grippers 311 towards the center, allowing the grippers 311 to center-position and clamp the shaft to be tested 107. Next, the cylinder 301 drives the centering clamping assembly to rise, thereby lifting the shaft to be tested 107, clamped by the grippers 311, into the testing mechanism. After the translation plate 306 raises the shaft 107 to its position, the driven wheel 308 should engage tightly with the drive wheel 207. The horizontal lead screw 203 then drives the drive gear 205 to rotate, which in turn drives the driven gear 206. The driven gear 206 then drives the drive wheel 207, which in turn drives the driven wheel 308. The driven wheel 308 then drives the fixed rotating plate 307 to rotate, ultimately rotating the shaft 107. This allows the inspection mechanism to detect the roundness and diameter of the shaft 107, thus enabling rapid dimensional inspection of shaft parts. After the test is completed, the gripping mechanism is reset, and the tested shaft parts are placed back on the V-shaped support block 106 and move forward with the V-shaped support block 106. When the shaft parts move to the end of the feeding mechanism, they are transferred to the deflection slide rail 405. Based on the previous test results, the shifting motor 406 drives the deflection slide rail 405 to deflect. When the result is a qualified product, the rear end of the deflection slide rail 405 points to the qualified box 403. When the result is a defective product, the rear end of the deflection slide rail 405 points to the scrap box 402. In this way, the tested parts are automatically classified to avoid the mixing of qualified and scrap products.

[0037] The electrical and power components mentioned above are all connected to an external main controller and 220V AC mains power. The main controller can be a conventional known device such as a computer, and the internal control program of the main controller can be a commercially available CNC system.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A dimensional inspection device for mechanical parts, comprising a feeding mechanism, a detection mechanism mounted on the feeding mechanism, and a unloading mechanism mounted at the rear of the feeding mechanism, characterized in that: A gripping mechanism is provided below the detection mechanism. The gripping mechanism includes a cylinder (301). A centering clamping assembly is installed at the output end of the cylinder (301). Two translation plates (306) are installed on the centering clamping assembly. A fixed rotating plate (307) is rotatably connected to the upper end of the translation plate (306). A telescopic support rod (313) is fixedly connected to the center of one side of the fixed rotating plate (307). A translation rotating plate (309) is fixedly connected to the other end of the telescopic support rod (313). The translation plate (309) is provided with a number of circumferentially evenly arranged straight grooves. A gripper (311) is slidably connected to the straight groove of the translation plate (309). A number of circumferentially evenly arranged connecting rods (310) are hinged to the fixed plate (307). The other end of the connecting rod (310) is hinged to the translation plate (309). A number of circumferentially evenly arranged springs (312) are fixedly connected between the gripper (311) and the fixed plate (307).

2. The dimensional inspection equipment for mechanical parts according to claim 1, characterized in that: The centering clamping assembly includes a lifting bracket (302) fixedly connected to the output end of the cylinder (301), a bidirectional lead screw (305) rotatably connected to the lifting bracket (302), a clamping motor (303) fixedly connected to one side of the lifting bracket (302), the output end of the clamping motor (303) being fixedly connected to the bidirectional lead screw (305), a limit rod (304) fixedly connected to the upper end of the lifting bracket (302), the lifting bracket (302) being threadedly connected to two translation plates (306), and the translation plates (306) being slidably connected to the limit rod (304).

3. The dimensional inspection equipment for mechanical parts according to claim 1, characterized in that: The feeding mechanism includes a feeding bracket (101), with symmetrically arranged rotating shafts (102) rotatably connected to the front and rear ends of the feeding bracket (101). Symmetrically arranged sprockets (103) are fixedly connected to the left and right ends of the rotating shafts (102). Chains (104) are installed on the front and rear sprockets (103). V-shaped support blocks (106) are fixedly connected to the chains (104). A feeding motor (105) is fixedly connected to one side of the feeding bracket (101). The output end of the feeding motor (105) is fixedly connected to one of the rotating shafts (102). A test shaft (107) is placed on the left and right V-shaped support blocks (106). The cylinder (301) is fixedly connected to the lower end of the feeding bracket (101).

4. The dimensional inspection equipment for mechanical parts according to claim 3, characterized in that: The detection mechanism includes a portal frame (201) fixedly connected to the feeding bracket (101), a horizontal lead screw (203) rotatably connected to the top of the portal frame (201), a detection motor (202) fixedly connected to one side of the top of the portal frame (201), the output end of the detection motor (202) fixedly connected to the horizontal lead screw (203), a vision detection component (204) threadedly connected to the horizontal lead screw (203), and the vision detection component (204) slidably connected to the portal frame (201).

5. The dimensional inspection equipment for mechanical parts according to claim 4, characterized in that: The other end of the horizontal lead screw (203) is fixedly connected to a drive gear (205), and a driven gear (206) is rotatably connected to the portal bracket (201). The driven gear (206) meshes with the drive gear (205). The diameter of the drive gear (205) is larger than the diameter of the driven gear (206). One end of the inner side of the driven gear (206) is fixedly connected to a drive wheel (207), and the outer end of the fixed rotating plate (307) is fixedly connected to a driven wheel (308). The driven wheel (308) and the drive wheel (207) can be closely attached.

6. The dimensional inspection equipment for mechanical parts according to claim 3, characterized in that: The unloading mechanism includes a receiving bracket (401) placed behind the loading bracket (101). A qualified box (403) is placed on the upper end of the receiving bracket (401), and a waste box (402) is placed on the receiving bracket (401). The qualified box (403) is located above and behind the waste box (402). An L-shaped bracket (404) is fixedly connected to the front end of the receiving bracket (401). A deflection slide rail (405) is hinged on the L-shaped bracket (404). The front end of the deflection slide rail (405) is located between the two sprockets (103). A shift motor (406) is fixedly connected to one side of the chain (104). The output end of the shift motor (406) is fixedly connected to the deflection slide rail (405).

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