Detector for gear surface defects
By designing a gear detector that includes a conductive needle and an LED current color change lamp, the problem of inaccurate judgment of defect positions and shapes in traditional detection methods is solved, and intuitive and comprehensive detection of gear surface defects is achieved.
Patent Information
- Application Number
- CN202421443102.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-06-24
AI Technical Summary
Traditional detection of surface defects of gears mainly relies on manual experience, and the specific location and shape of the defect cannot be accurately judged, resulting in incomplete detection and invisible feedback on the specific situation of the defect.
A detector including a support base, a detection housing, a conductive needle, and an LED current color change lamp is designed. By changing the contact state between the conductive needle and the gear surface, the LED current color change lamp displays the position and shape of the defects, and realizes intuitive detection of the gear surface defects.
It can accurately display the specific location and shape of defects such as depressions, cracks, bumps and rust on the gear surface, and judge the area and direction of the defect without chemical solvents, improving the accuracy and comprehensiveness of the detection.
Smart Images
Figure CN223217425U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of gear detection, in particular to a detector for gear surface defects. Background Art
[0002] Surface defects refer to various defects that appear on the surface of products or workpieces during processing, production, transportation, and use that do not meet design requirements or standards. Surface defects not only affect the product's appearance but may also adversely affect its performance. Wear is surface damage caused by friction or scraping from external objects. This defect typically appears as scratches, abrasions, or wear marks and can affect the appearance and function of an object. Corrosion is surface erosion and corrosion caused by contact with chemicals or oxidants. Corrosion can cause oxidation, rust, or discoloration of the metal surface and may cause the material to lose its original strength and durability. Porosity refers to the presence of small pores or bubbles on or within the material. This defect can reduce the material's density and mechanical strength and may cause it to crack, break, or collapse during use.
[0003] Traditionally, workers rely on their experience to determine whether a gear has surface defects. This can easily lead to missed defects, which can cause problems in subsequent use of the gear and even greater losses. This method can only detect whether a defect exists, but cannot truly reflect the specific location, shape, and area of the defect.
[0004] Therefore, it is necessary to propose a detector for gear surface defects to solve the above problems. Utility Model Content
[0005] The purpose of the utility model is to provide a detector for gear surface defects, so as to solve the above-mentioned problem of incomplete detection and inability to intuitively feedback the defect position and volume.
[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a detector for gear surface defects, comprising a supporting base, a detection shell is fixedly installed on the top of the supporting base, a protective shell is provided on one side of the detection shell, a mounting screw is fixedly installed on the middle part of the side of the detection shell close to the protective shell, a plurality of evenly distributed conduction needles are slidably inserted on the surface of the side of the detection shell close to the protective shell, a circuit board is fixedly installed inside the detection shell, a first spring is fixedly installed on the end of the conduction needle close to the circuit board, a varistor is provided on the end of the first spring close to the circuit board, the varistor is fixedly installed on the circuit board, and a plurality of LED current color-changing lights corresponding to the conduction needles are fixedly installed on the side of the circuit board away from the varistor.
[0007] Preferably, a conductive column is fixedly installed in the middle of the mounting screw, and a first slot is opened at the end of the mounting screw away from the detection shell. The end of the conductive column extends into the first slot, and a second spring is provided inside the first slot. A wire is provided inside the second spring, and both ends of the wire are fixedly connected to the two ends of the second spring respectively.
[0008] Preferably, the outside of the end of the mounting screw away from the detection shell is connected to a conical fastening cap through threaded fitting, a second slot is opened inside the conical fastening cap, a conductive core column is fixedly installed in the middle of the second slot, and the conductive core column is fitted with the second spring near the end of the mounting screw.
[0009] Preferably, a transparent plate is fixedly mounted on a side of the detection housing away from the protective housing.
[0010] Preferably, a battery panel is detachably mounted on the lower end of the support base away from the protective shell.
[0011] Preferably, a supporting foot is fixedly mounted on the bottom end of the supporting base close to the protective shell.
[0012] Preferably, a threaded ring is fixedly mounted on one side of the protective housing close to the detection housing, a threaded groove is provided on one side of the detection housing close to the protective housing, and the threaded ring is connected to the inside of the threaded groove through threaded fitting.
[0013] Technical effects and advantages of this utility model:
[0014] When there are depressions and cracks on the gear surface, the conductive pin at the corresponding position will be disconnected, causing the corresponding graded circuit to be in an open circuit state. At this time, the LED current color-changing light at the corresponding position will be off. The presence of depressions on the gear surface and the specific location of the depression can be observed by looking at the LED current color-changing light. If the depression is caused by a crack, the light where the LED current color-changing light is off corresponds to the size and direction of the crack, so that the depressions and cracks on the workpiece surface can be intuitively displayed.
[0015] When detecting uneven spots on the gear surface, the color of the LED current color-changing light should be green. If it appears red, it means that there is a bump on the surface of the gear, causing the conductive needle to compress the first spring and the varistor. At this time, the LED current color-changing light corresponding to the location of the bump is red. Conversely, the LED current color-changing light can accurately display the volume and length direction of the bump, so that the device can not only detect uneven spots and cracks on the gear surface, but also convert the volume and direction of the uneven spots into light signals and feed them back to the inspector, so that the inspector can take pictures to feedback the actual situation of the gear;
[0016] The color of the LED current color-changing lights is all red. If the LED current color-changing lights are green or yellow, it means that there is rust or dirt on the corresponding part of the gear, which causes the conductivity of the part to decrease. When the voltage is constant, the current flow is reduced, and the rust condition of the gear surface can be detected. The detection range is wide, and the rust condition of the gear surface, the specific location, area and direction of the rust can be judged without the use of chemical solvents. The device has diverse functions and high practicality. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic structural diagram of a detector for gear surface defects according to the present invention.
[0018] Figure 2 This is a schematic diagram of the disassembled structure of the detection shell and the protection shell in the utility model.
[0019] Figure 3 This is a schematic diagram of the connection structure of the detection housing, the mounting screw, and the conical fastening cap in the present utility model.
[0020] Figure 4 This is a schematic diagram of the connection structure of the conductive needle, the first spring, and the varistor in the present utility model.
[0021] Figure 5 It is a cross-sectional view of the installation screw in the present utility model.
[0022] In the figure: 1. Support base; 2. Detection shell; 3. Protective shell; 4. Circuit board; 5. Mounting screw; 6. Conical fastening cap; 7. Conductive needle; 8. First spring; 9. Varistor; 11. Battery board; 12. Support foot; 21. Transparent plate; 22. Threaded groove; 31. Threaded ring; 41. LED current color-changing lamp; 51. First slot; 52. Second spring; 53. Conductive column; 54. Wire; 61. Second slot; 62. Conductive core column. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0024] The utility model provides Figure 1-5A detector for gear surface defects shown in the figure includes a support base 1, a detection shell 2 is fixedly installed on the top of the support base 1, a protective shell 3 is provided on one side of the detection shell 2, the material of the protective shell 3 is a transparent material, which can be but is not limited to PC material, a transparent plate 21 is fixedly installed on the side of the detection shell 2 away from the protective shell 3, the transparent plate 21 can be but is not limited to a glass plate, a threaded ring 31 is fixedly installed on the side of the protective shell 3 close to the detection shell 2, a threaded groove 22 is provided on the side of the detection shell 2 close to the protective shell 3, the threaded ring 31 is connected to the inside of the threaded groove 22 by threaded fitting, and a supporting foot 12 is fixedly installed on the bottom end of the support base 1 close to the protective shell 3. When not in use, the protective shell 3 and the detection shell 2 can be installed to protect the components on the surface of the detection shell 2, which can effectively prevent the surface components of the detection shell 2 from being damaged or rusted.
[0025] A mounting screw 5 is fixedly installed in the middle of one side of the detection shell 2 close to the protective shell 3. The material used for the mounting screw 5 is an insulating material or a weakly conductive material. A plurality of evenly distributed conductive needles 7 are slidably inserted on the surface of the side of the detection shell 2 close to the protective shell 3. The conductive needles 7 are made of conductive material. A circuit board 4 is fixedly installed inside the detection shell 2. The circuit board 4 has a circuit that provides the circuit direction of the entire device. A first spring 8 is fixedly installed on one end of the conductive needle 7 close to the circuit board 4. The first spring 8 is made of conductive material. A varistor 9 is provided on the end of the first spring 8 close to the circuit board 4. The resistance value of the varistor 9 decreases rapidly with the increase of pressure. The varistor 9 is fixedly installed on the circuit board 4. A plurality of LED current color-changing lights 41 corresponding to the conduction pins 7 are fixedly installed on the side of the circuit board 4 away from the varistor 9. The LED current color-changing lights 41 have three colors: red, yellow and green. When the current passing through the LED current color-changing light 41 exceeds the standard current range, the LED current color-changing light 41 is red. When the current passing through the LED current color-changing light 41 is lower than the standard current range, the LED current color-changing light 41 is yellow. When the current passing through the LED current color-changing light 41 is within the normal current range, the LED current color-changing light 41 is green. A battery panel 11 is detachably installed on the lower end of the side of the support base 1 away from the protective shell 3. The battery panel 11 is used to provide the power required by the entire device.
[0026] A conducting needle 7, a first spring 8, a piezoresistor 9, and an LED current color-changing lamp 41 are connected in series to form a primary circuit, and n conducting needles 7, n first springs 8, n piezoresistors 9, and n LED current color-changing lamps 41 are connected in series to form n multi-stage circuits. The n multi-stage circuits are connected in parallel to form an anode main circuit, and the anode circuit is connected to the anode of the battery panel 11.
[0027] A conductive column 53 is fixedly installed in the middle of the mounting screw 5, and a first slot 51 is opened at the end of the mounting screw 5 away from the detection shell 2, and the end of the conductive column 53 extends into the first slot 51, and a second spring 52 is provided inside the first slot 51, and a wire 54 is provided inside the second spring 52. The two ends of the wire 54 are respectively fixedly connected to the two ends of the second spring 52, and a conical fastening cap 6 is connected to the outside of the end of the mounting screw 5 away from the detection shell 2 through threaded cooperation, and a second slot 61 is opened inside the conical fastening cap 6. A conductive core column 62 is fixedly installed in the middle of the second slot 61. The conical fastening cap 6 and the conductive core column 62 are both made of conductive materials. The conductive core column 62 is in contact with the second spring 52 near the end of the mounting screw 5, and the wire 54 is used to establish a reliable electrical connection between the conductive column 53 and the conductive core column 62.
[0028] In actual use, first remove the conical fastening cap 6, then put the gear sleeve on the outside of the mounting screw 5, then screw the conical fastening cap 6 back into the mounting screw 5, and slowly rotate the conical fastening cap 6 so that the conical fastening cap 6 is gently fitted with the surface of the gear. At this time, the gear, conical fastening cap 6, conductive core column 62, wire 54, and conductive column 53 form a cathode circuit, and the cathode circuit is connected to the cathode of the battery panel 11. At this time, the entire device forms a closed loop. If there are defects on the surface of the gear, such as depressions, cracks, and protrusions, when there are depressions and cracks on the gear surface, the conductive pin 7 at the corresponding position will be disconnected, causing the corresponding graded circuit to be in an open circuit state. At this time, the LED current color-changing light 41 at the corresponding position will be in an off state. The off state of the LED current color-changing light 41 can be used to observe whether there is a depression on the surface of the gear and the specific location of the depression. If the depression is caused by a crack, the light of the LED current color-changing light 41 that is off corresponds to the size and direction of the crack, so that the depressions and cracks on the workpiece surface can be intuitively displayed.
[0029] Furthermore, when detecting the concave and convex points on the gear surface, the color of the LED current color-changing light 41 should be green. If red appears, it means that there are convex points on the surface of the gear, causing the conductive needle 7 to compress the first spring 8 and the varistor 9. At this time, the LED current color-changing light 41 corresponding to the position of the convex point is red. Relatively speaking, the LED current color-changing light 41 can accurately display the volume and length direction of the convex point, so that the device can not only detect the concave and convex points and cracks on the gear surface, but also convert the volume and direction of the concave and convex points into light signals and feed them back to the inspectors, making it convenient for the inspectors to take pictures and feed back the actual situation of the gear.
[0030] Furthermore, after the detection of recessed cracks on the gear surface is completed, the conical fastening cap 6 continues to be rotated. At this time, the conical fastening cap 6 drives the gear to move, and then pushes the conductive needle 7 to move. At this time, the conductive needle 7 compresses the first spring 8, and then the first spring 8 generates a thrust on the varistor 9. The resistance of the varistor 9 decreases rapidly. At this time, the color of the LED current color-changing light 41 is all red. If the LED current color-changing light 41 is green or yellow, it means that rust or dirt has appeared in the corresponding part of the gear, resulting in a decrease in the conductivity of the part. When the voltage is constant, the current passing through is reduced, and the rust condition of the gear surface can also be detected. The detection range is wide, and the rust condition of the gear surface, as well as the specific location, area and direction of the rust, can be judged without using chemical solvents. The device has diverse functions and high practicality.
Claims
1. A detector for gear surface defects, comprising a support base (1), characterized in that: A detection shell (2) is fixedly mounted on the top of the support base (1), a protective shell (3) is provided on one side of the detection shell (2), a mounting screw (5) is fixedly mounted on the middle of the side of the detection shell (2) close to the protective shell (3), a plurality of evenly distributed conducting needles (7) are slidably inserted on the surface of the side of the detection shell (2) close to the protective shell (3), a circuit board (4) is fixedly mounted inside the detection shell (2), a first spring (8) is fixedly mounted on one end of the conducting needle (7) close to the circuit board (4), a varistor (9) is provided on one end of the first spring (8) close to the circuit board (4), the varistor (9) is fixedly mounted on the circuit board (4), and a plurality of LED current color-changing lamps (41) corresponding one to one to the conducting needles (7) are fixedly mounted on the side of the circuit board (4) away from the varistor (9).
2. The detector for gear surface defects according to claim 1, characterized in that: A conductive column (53) is fixedly mounted in the middle of the mounting screw (5), and a first slot (51) is provided at one end of the mounting screw (5) away from the detection housing (2). The end of the conductive column (53) extends into the interior of the first slot (51), and a second spring (52) is provided inside the first slot (51). A wire (54) is provided inside the second spring (52), and two ends of the wire (54) are fixedly connected to two ends of the second spring (52) respectively.
3. The detector for gear surface defects according to claim 2, characterized in that: The end of the mounting screw (5) away from the detection housing (2) is connected to a conical fastening cap (6) through threaded engagement, a second slot (61) is provided inside the conical fastening cap (6), a conductive core column (62) is fixedly installed in the middle of the second slot (61), and the conductive core column (62) is fitted with the second spring (52) at one end close to the mounting screw (5).
4. The detector for gear surface defects according to claim 1, characterized in that: A transparent plate (21) is fixedly mounted on a side of the detection housing (2) away from the protection housing (3).
5. The detector for gear surface defects according to claim 1, characterized in that: A battery panel (11) is detachably mounted on the lower end of the support base (1) away from the protective shell (3).
6. The detector for gear surface defects according to claim 1, characterized in that: A supporting foot (12) is fixedly mounted on the bottom end of the support base (1) on a side close to the protective shell (3).
7. The detector for gear surface defects according to claim 1, characterized in that: A threaded ring (31) is fixedly mounted on a side of the protective housing (3) close to the detection housing (2); a threaded groove (22) is provided on a side of the detection housing (2) close to the protective housing (3); and the threaded ring (31) is connected to the inside of the threaded groove (22) through threaded engagement.