Gear quality detection table

Abstract

A gear quality detection table comprises a workbench, and is further provided with a rotary fixing mechanism, a gear weight detection mechanism, a detection circuit and a tooth conical end face detection mechanism. The rotary fixing mechanism comprises an electric push rod, a connecting rod, a sleeve and a bearing, the gear weight detection mechanism comprises a motor speed reduction device, a fixed pipe, a weight sensor, a conical top sleeve, a movable rod and a lead screw, and the gear conical end face detection mechanism comprises an electric push rod A, a pressure sensor and multiple sets of rotary contact wheels. Each set of rotating contact wheel comprises a fixed seat and a rotating wheel, the rotating wheel is rotatably mounted in the fixed seat, and the two detection circuits are mounted in the element box and are electrically connected. The device can detect the thickness of the gear, the wear degree of the gear and whether the gear is broken or not, can further accurately detect whether the gear conical end face of the gear is broken or over-worn or not through the gear conical end face detection mechanism and the second detection circuit, and can generate an alarm signal in time to prompt detection personnel when abnormity occurs.

Description

Technical Field

[0001] The invention relates to the technical field of detection equipment, in particular to a gear quality detection platform. Background Art

[0002] Gears are a widely used power transmission mechanism. In actual applications, due to factors such as long-term wear, gears will have broken teeth, tooth wear (thinning of the tapered end face of the tooth, etc.), and thinning of the thickness of the gear itself (gears move left and right on the gear shaft and the two inner ends of the gear box, or wear and contact with other gears for various reasons). In order to ensure the normal transmission of power by gears, when the gear box fails to repair, technicians need to inspect the appearance quality of the gears to prevent the problematic gears from continuing to be used, which will have an adverse effect on the normal operation of the gear box.

[0003] Existing gear appearance inspection is generally performed by technicians through manual visual inspection. Manual inspection of broken teeth is relatively effective and intuitive, but the thinning of the conical end face of the gear and the thinning of the front and rear ends of the gear itself are affected by the skills of the inspectors, and there is no guarantee that the inspectors can effectively detect the gear failure point. Especially for places with a large amount of maintenance (such as the gearbox maintenance department dedicated to the repair of overhead cranes, automobiles, etc.), for manufacturers specializing in the production of gears, or manufacturers of terminal application gears, manual inspection of the quality of a large number of gears still has the disadvantages of being time-consuming and labor-intensive. Summary of the invention

[0004] In order to overcome the existing manual batch detection of gear quality, which has the disadvantages as described in the background technology, the present invention provides a gear quality detection platform which is mainly used for batch gear quality detection and can detect the thickness and tooth wear of the gear itself, as well as the presence of broken teeth, by gravity and contact methods. When an abnormality occurs, an alarm signal can be generated in time to prompt the detection personnel, thereby bringing convenience to the detection personnel and improving the detection efficiency and accuracy.

[0005] The technical solution adopted by the present invention to solve its technical problem is: A gear quality inspection table, including a workbench, characterized in that it also has a rotating fixing mechanism, a gear weight detection mechanism, a detection circuit, and a tooth conical end face detection mechanism; the rotating fixing mechanism includes an electric push rod, a connecting rod, a sleeve, and a bearing, the lower end of the electric push rod is installed on the upper part of one end of the workbench, the upper end of the electric push rod is installed with a fixed seat, there are at least two bearings, the first bearing is installed in the fixed seat, a vertical rod is installed in the inner ring of the first bearing, one side end of the connecting rod is welded to the upper end of the vertical rod, one side end of the sleeve is installed on the other side end of the connecting rod, and the second bearing is installed in the sleeve; the gear weight detection mechanism includes an electric push rod, a connecting rod, a sleeve, and a bearing, the lower end of the electric push rod is installed on the upper part of one end of the workbench, the upper end of the electric push rod is installed with a fixed seat, there are at least two bearings, the first bearing is installed in the fixed seat, a vertical rod is installed in the inner ring of the first bearing, one side end of the connecting rod is welded to the upper end of the vertical rod, one side end of the sleeve is installed on the other side end of the connecting rod, and the second bearing is installed in the sleeve; The quantity detection mechanism includes a motor reduction device, a fixed tube, a weight sensor, a conical top sleeve, a movable rod, and a screw rod. There is an opening in the middle of the upper end of the workbench, the motor reduction device is installed in the workbench, the upper end of the rotating shaft of the motor reduction device is installed with a lower limit plate, the lower end of the fixed tube is installed on the upper end of the lower limit plate, the inner side of the fixed tube and the outer side of the movable rod are both special-shaped structures, and the weight sensor is installed in the fixed tube; the movable rod is movablely sleeved in the fixed tube and its lower end contacts the force-bearing surface of the weight sensor, the upper end of the fixed tube is provided with a guide hole, the lower end of the guide rod installed at the upper end of the movable rod is located in the guide hole, and multiple insulating devices are installed on the outer side of the lower end of the fixed tube. Conductive ring, the inner side of the conductive ring is electrically connected to the power input terminal and signal output terminal of the weight sensor; a plurality of contact pieces are installed in the workbench, and the plurality of contact pieces are respectively in electrical sliding contact with the outer ends of the plurality of conductive rings, the upper part of the guide rod is located outside the upper end of the workbench, the upper end of the guide rod is installed with an upper limit plate, the lower end of the screw rod is installed on the upper end of the upper limit plate, there are two conical top sleeves, the first conical top sleeve is installed at the lower end of the screw rod with its conical surface facing upward, the second conical top sleeve is movably sleeved outside the upper end of the screw rod, and a nut is screwed into the upper end of the screw rod; the tooth conical end face detection mechanism includes an electric push rod A, a pressure sensor, and a rotating contact wheel There are multiple sets of rotating contact wheels, each set of rotating contact wheels includes a fixed seat and a rotating wheel, the rotating wheel is rotatably installed in the fixed seat, and a left flange is installed on the side end of the fixed seat; the force-bearing surface of the pressure sensor is installed with a right flange, the pressure sensor installation surface and one side end of the electric push rod A are installed together, and the other side of the electric push rod A is installed on the other side end of the workbench, and one set of rotating contact wheels and the pressure sensor are installed together; the detection circuit has at least two paths, and the detection circuit is installed in the component box; the signal output ends of the weight sensor and the pressure sensor are electrically connected to the signal input ends of the two detection circuits respectively.

[0006] Furthermore, the inner diameter of the second conical top sleeve is larger than the outer diameter of the screw rod; the outer diameter of the movable rod is smaller than the inner diameter of the fixed tube and the upper end is spaced a distance from the upper end inside the fixed tube.

[0007] Furthermore, the outer diameters of the rotating wheels of the multiple sets of rotating contact wheels are inconsistent, and the outer diameter of the rotating wheel is larger than the distance between two teeth of the detected gear.

[0008] Furthermore, the outer diameters of the upper end of the first conical top sleeve and the lower end of the second conical top sleeve are smaller than the inner diameter of the inner hole of the detection gear, and the outer diameters of the lower end of the first conical top sleeve and the upper end of the second conical top sleeve are larger than the outer diameter of the inner hole of the detection gear.

[0009] Furthermore, the first detection circuit includes an electrically connected resistor, an adjustable resistor, a voltmeter, a transistor, and a buzzer, one end of the two adjustable resistors are connected, the other end of the first adjustable resistor is connected to one end of the first resistor and the positive power supply input terminal of the voltmeter, the other end of the second adjustable resistor is connected to one end of the second resistor and one end of the third resistor, the other end of the first resistor is connected to the other end of the second resistor and the emitters of the two transistors, the other end of the third resistor is connected to the base of the first transistor, the collector of the first transistor is connected to one end of the fourth resistor and the base of the second transistor, the collector of the second transistor is connected to the negative power supply input terminal of the buzzer, and the other end of the fourth resistor is connected to the positive power supply input terminal of the buzzer.

[0010] Furthermore, the second detection circuit includes an electrically connected resistor, an adjustable resistor, a transistor, and a buzzer, one end of the first adjustable resistor is connected to one end of the first resistor and one end of the second resistor, the other end of the second resistor is connected to the base of the first transistor, the collector of the first transistor is connected to one end of the third resistor and the base of the second transistor, the collector of the second transistor is connected to the negative power supply input of the buzzer, the other end of the third resistor is connected to the positive power supply input of the buzzer, and the other end of the first resistor is connected to the emitters of the two transistors.

[0011] The beneficial effects of the present invention are as follows: the present invention has a compact structure. Before measuring, the staff rotates the connecting rod, sleeve, bearing, etc. of the rotating fixing mechanism to one side, then puts the gear to be tested on the screw, and passes through the conical top sleeve, and then rotates the fixing mechanism so that the inner ring of the bearing rotates to the upper end of the screw, which is a rotation guide limit for the screw and the gear, etc.; the present method can detect the thickness and tooth wear of the gear itself, as well as whether there are broken teeth, etc. through the gear weight detection mechanism and the first detection circuit, and can further accurately detect whether there are broken teeth and excessive wear on the tooth conical end face of the gear through the tooth conical end face detection mechanism and the second detection circuit, and can generate an alarm signal in time to prompt the detection personnel when an abnormality occurs. The present invention brings convenience to the detection personnel and improves the detection efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 It is a schematic diagram of the overall and partial enlarged structure of the present invention.

[0014] Figure 2 It is a schematic diagram of a partially enlarged structure of the present invention.

[0015] Figure 3 is a circuit diagram of the present invention. DETAILED DESCRIPTION

[0016] Figure 1 , 2As shown in , 3, a gear quality inspection platform includes a power module A1, a hollow workbench 1, power switches S1, S2, S3, and also has a rotation fixing mechanism, a gear weight detection mechanism, a detection circuit 2, and a tooth conical end face detection mechanism; the rotation fixing mechanism includes an electric push rod M1, a connecting rod 31, a sleeve 32, and a bearing 33. The lower end of the cylinder of the electric push rod M1 is vertically distributed and welded to the upper middle part of the left end of the workbench 1. The upper end of the push column of the electric push rod M1 is welded with a fixing seat 34 with an open upper part and a closed lower part. There are two bearings 33. The outer ring of the first bearing 33 is tightly sleeved in the fixing seat 34, and the inner ring of the first bearing 33 is tightly sleeved with a vertical rod 35. The left end of the connecting rod 31 is welded to the upper end of the vertical rod 35. The sleeve The left end of 32 is vertically welded to the right end of the connecting rod 31, and the outer ring of the second bearing 33 is tightly sleeved in the lower end of the sleeve 32; the gear weight detection mechanism includes a motor reduction device M2, a fixed tube 41, a weight sensor A2, a conical top sleeve 44, a movable rod 42, and a screw 43. There is an opening 101 in the middle of the upper end of the workbench 1, and the lower end of the shell of the motor reduction device M2 is fixedly installed in the middle of the lower end of the workbench 1. A lower limit plate 45 is welded on the upper end of the rotating shaft of the motor reduction device M2. The lower end of the fixed tube 41 is vertically welded to the middle of the upper end of the lower limit plate 45. The inner side of the fixed tube 41 and the outer side of the movable rod 42 are both hexagonal structures. The weight sensor A2 is fixedly installed in the lower end of the fixed tube 41 and the connected wires are connected to the outside through the opening on the right end of the fixed tube 41. Lead out; the movable rod 42 is movably sleeved in the fixed tube 41 and its lower end contacts the force-bearing surface of the weight sensor A2. The upper end of the fixed tube 41 is a closed structure and has a guide hole in the middle. The guide rod 421 (the outer diameter is smaller than the inner diameter of the guide hole) welded in the middle of the upper end of the movable rod 42 has a lower end that is movably located in the guide hole and an upper end that is located outside the upper end of the fixed tube 41. An insulating sleeve 46 is tightly sleeved on the outer side of the lower end of the fixed tube 41. Three copper conductive rings 47 are installed on the outer side of the insulating sleeve 46 at equal intervals from top to bottom. The inner side of the conductive ring 47 is respectively connected to the two power input terminals 1 and 2 and the signal output terminal 3 of the weight sensor A2 through wires; an insulating seat 102 is fixedly installed on the inner upper end of the workbench 1, and the lower left end of the insulating seat 102 is between the upper and lower ends. Three copper contact pieces 48 are fixedly installed horizontally at equal intervals (respectively connected to the power output terminals 3 and 4 of the power module A1 and one end of the adjustable resistor RP1 through wires), and the left rear ends of the three contact pieces 48 are respectively in electrical sliding contact with the front outer ends of the three conductive rings 47. The middle part of the guide rod 421 is located in the upper end opening 101 of the workbench (the inner diameter is larger than the outer diameter of the guide rod) and the upper part is located outside the upper end of the workbench 1. An upper limit plate 49 is welded to the upper end of the guide rod, and the lower end of the screw rod 43 is welded to the middle part of the upper end of the upper limit plate 49. There are two conical top sleeves 44, the first conical top sleeve 44 is welded to the lower end of the screw rod 43 with its conical surface facing upward, and the second conical top sleeve 44 is movably sleeved outside the upper end of the screw rod 43, and a nut 431 is screwed into the upper end of the screw rod 43;The tooth cone end face detection mechanism includes an electric push rod AM3, a pressure sensor A3, and a rotating contact wheel. The rotating contact wheel has multiple sets, and each set of rotating contact wheels includes a "]"-shaped fixed seat 51 and a rotating wheel 52. A miniature bearing is installed at the upper and lower ends of the middle of the rotating wheel 52, and a shaft rod is tightly sleeved in the inner ring of the two bearings. The upper and lower ends of the shaft rod are respectively welded to the middle of the upper and lower ends of the fixed seat 51 (which can rotate along the bearing through the shaft rod). A left flange 53 is horizontally installed in the middle of the right outer end of the fixed seat 51; the left end of the pressure sensor is subjected to force A right flange 54 is installed horizontally in the middle of the surface, the right end mounting surface of the pressure sensor A3 and the left end push column of the electric push rod AM3 are fixed together, and the cylinder of the electric push rod AM3 is horizontally distributed on the fixing seat 103 in the middle of the upper right end of the mounting platform, and one set of rotating contact wheels is installed together through the left flange 53 and the right flange 54 on the left end of the pressure sensor through bolts; the detection circuit 2 has two circuits, the power module A1, the power switch, and the detection circuit 2 are installed in the component box 6, and the component box 6 is installed on the left front side of the workbench 1. ;

[0017] Figure 1 , 2As shown in , 3, the inner diameter of the second conical top sleeve 44 (which can move up or down along the screw rod 43) is larger than the outer diameter of the screw rod 43; the outer diameter of the movable rod 42 is slightly smaller than the inner diameter of the fixed tube 41, and the upper end is spaced a certain distance from the upper end of the fixed tube 41 (the movable rod 42 can move up and down along the fixed tube 41). The outer diameters of the wheels 52 of the multiple sets of rotating contact wheels are inconsistent, and the outer diameter of each wheel 52 is larger than the spacing between the two teeth 71 of the required detection gear 7. The outer diameters of the upper end of the first conical top sleeve 44 and the lower end of the second conical top sleeve 44 are smaller than the inner diameter of the inner hole of the required detection gear 7, and the outer diameters of the lower end of the first conical top sleeve 44 and the upper end of the second conical top sleeve 44 are larger than the outer diameter of the inner hole of the required detection gear 7. The first detection circuit includes resistors R1, R2, R3, and R4 connected via circuit board wiring, adjustable resistors RP1 and RP2, a voltmeter V, transistors Q1 and Q2, a buzzer B, and a power switch S5; one end of the two RP1 and RP2 adjustable resistors are connected, the other end of the first adjustable resistor RP1 is connected to one end of the first resistor R1 and the positive power input end of the voltmeter V, the other end of the second adjustable resistor RP2 is connected to one end of the second resistor R2 and one end of the third resistor R3, the other end of the first resistor R1 is connected to the other end of the second resistor R2 and the emitters of the two transistors Q1 and Q2, the other end of the third resistor R3 is connected to the base of the first transistor Q1, the collector of the first transistor Q1 is connected to one end of the fourth resistor R4 and the base of the second transistor Q2, the collector of the second transistor Q2 is connected to the negative power input end of the buzzer B, and the other end of the fourth resistor R4 is connected to the positive power input end of the buzzer B and one end of the power switch S5. The second detection circuit includes resistors R5, R6, R7, an adjustable resistor RP3, transistors Q3, Q4, a buzzer B1, and a power switch S6 connected via circuit board wiring; one end of the first adjustable resistor RP3 is connected to one end of the first resistor R5 and one end of the second resistor R6, the other end of the second resistor R6 is connected to the base of the first transistor Q3, the collector of the first transistor Q3 is connected to one end of the third resistor R7 and the base of the second transistor Q4, the collector of the second transistor Q4 is connected to the negative power input end of the buzzer B1, the other end of the third resistor R7 is connected to the positive power input end of the buzzer B1 and one end of the power switch S6, and the other end of the first resistor R5 is connected to the emitters of the two transistors Q3 and Q4.

[0018] Figure 1 , 2As shown in Figure 3, the power input terminals 1 and 2 of the power module A1 and the power input terminal of the motor reduction mechanism M2 are connected in series through a power switch S2 and the two poles of the AC 220V power supply are connected through wires. The power output terminals 3 and 4 of the power module A1 and the power input terminals 1 and 2 of the second power switch S1 and the third power switch S3, the power input terminal of the two-way detection circuit, the other end of the power switch S5 and the emitter of the transistor Q1, the other end of the power switch S6 and the emitter of the transistor Q3, the power input terminals 1 and 2 of the weight sensor A2, and the power input terminals 1 and 2 of the pressure sensor A3 are connected through wires. The signal output terminals 3 of the weight sensor A2 and the pressure sensor A3 are connected through wires to one end of the adjustable resistor RP1 and the other end of the adjustable resistor RP3 at the signal input terminal of the two-way detection circuit. The power output terminals 3, 4 and 5, 6 of the second power switch S1 and the third power switch S3 are connected to the positive and negative and negative and positive and negative power input terminals of the electric push rod M1 and the positive and negative and negative and positive and negative power input terminals of the electric push rod AM3 through wires. The operating handles of all power switches, the display surface of the voltmeter, and the adjustment knobs of the adjustable resistors RP2 and RP3 (the component box at the side end is marked with numbers representing weight and pressure) are located outside the multiple openings at the front end of the component box.

[0019] Figure 1 , 2As shown in Figure 3, after the power input end of the power module A1 is powered, its 3 and 4 pins output a stable DC 24V power supply, which enters the power switches S1, S3, weight sensor A2, pressure sensor A3, and the power input end of the two detection circuits. The specific gear quality inspection process is as follows. (1): Before the inspection, the staff rotates the connecting rod 31, sleeve 32, bearing 33, etc. of the rotating fixing mechanism along the inner ring of the left end bearing 33 to the left end, and puts the gear 7 to be inspected on the screw rod, and the middle shaft hole of the lower end of the gear 7 is put on the upper end of the lower end top sleeve 44. Then the staff puts the upper end top sleeve 44 on the middle shaft hole of the upper end of the gear, and tightens the nut 431 (because the two top sleeves 44 are conical, they can effectively fix the gears with inner holes of different inner diameters). (2): Then the staff rotates the connecting rod 31 so that the sleeve 32 and the second bearing 33 are located at the upper end of the screw rod, and the handle of the power switch S1 is turned to the left. The 1st and 2nd pins and the 3rd and 4th pins of the power switch S1 are connected respectively. The positive and negative power input ends of the electric push rod M1 are energized, and its push column drives the sleeve 32 and the bearing 33 to move downward. When the sleeve 32 and the bearing 33 are located at the upper end of the screw rod and the inner ring of the second bearing 33 is sleeved on the outer side of the upper end of the screw rod 43, the power switch is turned off (the outer diameter of the upper end of the screw rod 43 is slightly smaller than the inner ring of the bearing 33. When the screw rod rotates later, it can rotate along the inner ring of the bearing After the subsequent inspection is completed, the staff turns the handle of the power switch S1 to the right, and the 1, 2 feet and 5, 6 feet of the power switch S1 are connected respectively, and the negative and positive power input ends of the electric push rod M1 are energized, and its push column drives the sleeve 32 and the bearing 33 to move upward. When the sleeve 32 and the bearing 33 are separated by a certain distance from the upper end of the screw rod, turn the connecting rod 31 to the left by hand (the left end of the connecting rod 31 rotates along the inner ring of the first bearing), unscrew the nut 431 and remove the top sleeve 44 at the upper end to complete the inspection of the corresponding gear 7.(3) When the gear 7 is fixed on the lead screw and the sleeve and the second bearing are not located at the upper end of the lead screw, the staff can perform a weight test on the gear (the weight will be reduced if the gear is worn and broken, or the tooth end face is worn); in the actual test, the weight of the gear 7 acts on the force-bearing surface of the weight sensor A2 through the movable rod 42. The greater the weight, the higher the voltage signal output by the 3rd pin of the weight sensor A2, and vice versa. The voltage signal is divided by the adjustable resistor RP1 and the resistor R1 and enters the power input terminal of the voltmeter V. The staff can visually understand whether the weight of the gear 7 is qualified by visually observing the voltage data displayed on the voltmeter (for example, the displayed voltage is 12.3V, minus the weight voltage of the movable rod, lead screw, guide rod, top sleeve and nut, etc.). The voltage signal is 3.4V, then the remaining 8.9V voltage represents the weight of the gear. The staff knows in advance that the corresponding voltage of the weight display of this model of gear is about 9V (a small deviation is the wear within the allowable range of the gear), which means that the detected gear of this model is less worn and the weight is appropriate); the voltage signal output by pin 3 of weight sensor A2 will also be divided by adjustable resistor RP2 and resistor R2, and resistor R3 will reduce the voltage and limit the current to enter the base of transistor Q1. When the gear is less worn and there is no broken tooth, that is, when the weight of wheel 7 is appropriate (not lower than the weight threshold set by the staff according to the normal weight of the gear and through adjustable resistor RP2, the working principle will be described in detail later), the voltage signal output by pin 3 of weight sensor A2 is relatively high. The voltage signal is divided by the adjustable resistor RP2 and the resistor R2, and the resistor R3 steps down and limits the current to enter the base of the transistor Q1, which is higher than 0.7V. The collector of the transistor Q1 is turned on and the output is a low level, which enters the base of the transistor Q2. The base of the transistor Q2 is cut off due to the lack of appropriate forward bias, and the buzzer B will not be powered to make a sound, indicating that the weight of the gear 7 is appropriate (less wear or no broken teeth). When the gear is worn a lot or broken teeth occur, that is, the weight of the gear 7 is not appropriate (lower than the weight threshold set by the staff according to the normal weight of the gear through the adjustable resistor RP2), the voltage signal output by the 3rd foot of the weight sensor A2 is relatively low. The voltage signal is divided by the adjustable resistor RP2 and the resistor R2, and the resistor R3 steps down and limits the current to enter the base of the transistor Q1 below 0.7V. The transistor Q1 is cut off and the collector no longer outputs a low level and enters the base of the transistor Q2. The base of the transistor Q2 obtains a forward bias through the resistor R4 step-down and current limiting. The transistor Q2 is turned on and the collector outputs a low level and enters the negative power input terminal of the buzzer B. The buzzer B will be powered and sound, reminding the staff that the weight of the gear 7 is not appropriate (excessive wear or broken teeth, thinning of the front and rear ends). After turning off the power switch S5, the buzzer B loses power and does not sound.

[0020] Figure 1 , 23, the specific gear quality inspection process, (4): the process is carried out after the bearing 33 in the sleeve is movably sleeved on the screw rod; the staff turns the handle of the power switch S3 to the right, and the 1, 2 and 5, 6 pins of the power switch S3 are connected respectively (before measurement, the corresponding set of one of the rotating contact wheels is bolted together through the left flange 53 and the right flange 54 on the left side of the pressure sensor, and the outer diameter of the rotating wheel 5 of the set of rotating contact wheels is larger than the spacing between the two teeth 71 of the gear 7 to be inspected), the negative and positive power input ends of the electric push rod AM3 are energized, and its push column pushes the left end 5 of the rotating wheel to contact the right end of the gear 7, and then the power switch S3 is turned off, and then the power switch S2 is turned on, and the motor reduction mechanism M 2 is powered on and its shaft drives the gear 7 to rotate clockwise (in the initial state, the staff controls the gear to have no broken teeth and a relatively less worn tooth end face located at the right end, so that the subsequent rotating wheel contacts this end face). When the fixed tube 41 rotates, the conductive ring 47 rotates and the contact piece 48 does not rotate, ensuring that the fixed tube and the weight sensor can rotate normally, and the rotating weight sensor can continue to be powered and output a voltage signal. In actual situations, the tooth end face of the detected gear 7 has less wear (the outer diameter is not too small, no broken teeth occur, and the distance between the two tooth end faces is smaller than the outer diameter of the rotating wheel 5). When the rotating wheel 52 rotates, it contacts the right end of the rotating gear 7. The force surface of the pressure sensor A3 is relatively large under the action of the rotating wheel, and the pressure sensor A3 is relatively large under the action of the rotating wheel. The voltage signal output from the 3rd foot of the sensor A3 is relatively high. The voltage signal is divided by the adjustable resistor RP3 and the resistor R5. The resistor R6 reduces the voltage and limits the current to enter the base of the transistor Q3, which is higher than 0.7V. The transistor Q3 is turned on and the collector outputs a low level to enter the base of the transistor Q4. The base of the transistor Q4 is cut off without a suitable forward bias, and the buzzer B1 will not be powered to sound, indicating that the tooth end face of the gear 7 is less worn, the outer diameter is not too small, there is no broken tooth, and the distance between the two tooth end faces is smaller than the outer diameter of the wheel 5; when the outer diameter of the detected gear 7 becomes smaller, or a broken tooth occurs, and the distance between the two tooth end faces is greater than the outer diameter of the wheel 5, the wheel 52 no longer effectively contacts the right end of the rotating gear 7 during rotation, and the wheel acts on the receiving end of the pressure sensor A3. The voltage signal output by the 3rd foot of the pressure sensor A3 is relatively small under the action of the force surface, and the voltage signal is relatively low. The voltage signal is divided by the adjustable resistor RP3 and the resistor R5, and the resistor R6 steps down and limits the current to enter the base of the transistor Q3, which is lower than 0.7V. The collector of the transistor Q3 is cut off and no longer outputs a low level to enter the base of the transistor Q4. The base of the transistor Q4 obtains a suitable forward bias voltage through the resistor R7 step-down and current limiting. The collector of the transistor Q4 is turned on and outputs a low level to enter the negative power input terminal of the buzzer B1. The buzzer B1 will be powered on and sound, reminding the staff that the tooth end face of the gear 7 is worn out, the outer diameter is too small, or the tooth is broken, and the distance between the two tooth end faces is greater than the outer diameter of the wheel 5. After turning off the power switch S6, the buzzer B1 loses power and does not sound.After the inspection is completed, the staff turns the handle of the power switch S3 to the left, and the 1, 2 and 3, 4 pins of the power switch S3 are connected respectively. The positive and negative power input ends of the electric push rod AM3 are energized, and its push column drives the left end 5 of the rotating wheel no longer contacts the right end of the gear 7, and then turns off the power switch S3 (to facilitate the removal of the gear after inspection).

[0021] As shown in 1, 2, and 3, through the combined action of all the above mechanisms, the present invention can detect the thickness and tooth wear of the gear itself, as well as whether there are broken teeth, etc., and can further accurately detect whether there are broken teeth and excessive wear on the tooth conical end face of the gear through the tooth conical end face detection mechanism and the second detection circuit, and can generate an alarm signal in time to prompt the detection personnel when an abnormality occurs. The present invention brings convenience to the detection personnel and improves the detection efficiency and accuracy. Figure 3Among them, the power module A1 is a finished product of an AC 220V to DC 24V switching power supply module of model 220V / 24V / 3KW; the power switches S1, S2, S3, S5, and S6 are toggle power switches; the motor reduction mechanism M2 is a coaxial motor gear reducer with a power of 500W; the electric push rod M1 and the electric push rod AM3 are finished products of a reciprocating electric telescopic rod with a power of 80W; the voltmeter V is a liquid crystal voltage display meter with a range of 24V; the buzzers B and B1 are finished products of active continuous sound buzzer alarms of model FM24V; the transistors Q1, Q2, Q3, and Q4 are NPN transistors of model 9013; the resistors R1, R2, R3, R4, and R5 , R6, and R7 have resistance values ​​of 7K, 7K, 4.7K, 100K, 7K, 4.7K, and 100K respectively; the resistance values ​​of the adjustable resistors RP1, RP2, and RP3 are 470K (the adjustable resistor RP2 is adjusted to about 85K in this embodiment. Specifically, the larger the resistance value of the adjustable resistor RP2 is adjusted, the larger the voltage division between it and the resistor R2 is. In this way, when the weight of the detected gear 7 is relatively large, the transistor Q1 will be turned on and the transistor Q2 will be turned off, and the buzzer B will not sound, that is, the gear weight alarm threshold is set relatively large, and the smaller the resistance value of the adjustable resistor RP2 is adjusted, the smaller the voltage division between it and the resistor R2 is. In this way, when the weight of the detected gear 7 is relatively small , the transistor Q1 will be turned on, the transistor Q2 will be turned off, and the buzzer B will not sound, that is, the gear weight alarm threshold is set relatively small, and the specific setting is adjusted by the detection personnel according to the normal weight of the detected gear combined with the weight number of the handle side end of the adjustable resistor RP2; the adjustable resistor RP3 in this embodiment is adjusted to about 56K. Specifically, the larger the resistance value of the adjustable resistor RP3 is adjusted, the larger the voltage division between it and the resistor R5 is. In this way, when the force acting on the left end face of the detected gear 7 contacting the rotating wheel 52 is relatively large, the transistor Q3 will be turned on, the transistor Q4 will be turned off, and the buzzer B1 will not sound, that is, the alarm threshold of the gear contacting the left end face of the rotating wheel is set relatively large, and the adjustable The smaller the resistance value of resistor RP3 is adjusted, the smaller the voltage divided between it and resistor R5 is. In this way, when the force acting on the left end face of the detected gear 7 contacting the rotating wheel 52 is relatively small, transistor Q3 will be turned on, transistor Q4 will be turned off, and buzzer B1 will not sound. That is, the alarm threshold of the gear contacting the left end face of the rotating wheel is set relatively small. The specific setting is adjusted and set by the detection personnel according to the pressure number on the handle side of the adjustable resistor RP3); the pressure sensor A3 and the weight sensor A2 are finished weight sensors of model ZMHBS, which have two power input terminals and one signal output terminal. The greater the weight detected by the force surface, the higher the voltage signal output by the signal output terminal, and vice versa.

[0022] It should be understood that although this specification is described according to the implementation mode, the implementation mode does not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A gear quality testing platform, comprising a workbench, characterized in that: It also has a rotating fixing mechanism, a gear weight detection mechanism, a detection circuit, and a tooth tapered end face detection mechanism; the rotating fixing mechanism includes an electric push rod, a connecting rod, a sleeve, and a bearing. The lower end of the electric push rod is installed on the upper part of one end of the workbench, and the upper end of the electric push rod is installed with a fixed seat. There are at least two bearings, the first bearing is installed in the fixed seat, and a vertical rod is installed in the inner ring of the first bearing. One side end of the connecting rod is welded to the upper end of the vertical rod, one side end of the sleeve is installed on the other side end of the connecting rod, and the second bearing is installed in the sleeve; the gear weight detection mechanism includes a motor reduction device, a fixed The working table comprises a tube, a weight sensor, a conical top sleeve, a movable rod, and a screw rod. There is an opening in the middle of the upper end of the workbench. The motor reduction device is installed in the workbench. The upper end of the rotating shaft of the motor reduction device is installed with a lower limit plate. The lower end of the fixed tube is installed on the upper end of the lower limit plate. The inner side of the fixed tube and the outer side of the movable rod are both special-shaped structures. The weight sensor is installed in the fixed tube; the movable rod movable sleeve is in the fixed tube and its lower end contacts the force-bearing surface of the weight sensor. There is a guide hole in the upper end of the fixed tube. The lower end of the guide rod installed at the upper end of the movable rod is located in the guide hole. A plurality of conductive rings are insulated and installed on the outer side of the lower end of the fixed tube. The inner side and The power input terminal and the signal output terminal of the weight sensor are electrically connected; a plurality of contact pieces are installed in the workbench, and the plurality of contact pieces are electrically and slidingly contacted with the outer ends of the plurality of conductive rings respectively; the upper part of the guide rod is located outside the upper end of the workbench, an upper limit plate is installed on the upper end of the guide rod, and the lower end of the screw rod is installed on the upper end of the upper limit plate; there are two conical top sleeves, the first conical top sleeve is installed on the lower end of the screw rod with its conical surface facing upward, and the second conical top sleeve is movably sleeved on the outer end of the upper end of the screw rod, and a nut is screwed into the upper end of the screw rod; the tooth conical end face detection mechanism includes an electric push rod A, a pressure sensor, a rotating contact wheel, and a rotating contact wheel. There are multiple sets, each set of rotating contact wheels includes a fixed seat and a rotating wheel, the rotating wheel is rotatably installed in the fixed seat, and a left flange is installed on the side end of the fixed seat; the force-bearing surface of the pressure sensor is installed with a right flange, the pressure sensor installation surface and one side end of the electric push rod A are installed together, and the other side of the electric push rod A is installed on the other side end of the workbench, and one set of rotating contact wheels and the pressure sensor are installed together; the detection circuit has at least two paths, and the detection circuit is installed in the component box; the signal output ends of the weight sensor and the pressure sensor are electrically connected to the signal input ends of the two detection circuits respectively.

2. A gear quality testing platform according to claim 1, characterized in that: The inner diameter of the second conical top sleeve is larger than the outer diameter of the screw rod; the outer diameter of the movable rod is smaller than the inner diameter of the fixed tube and the upper end is spaced a distance from the upper end of the fixed tube.

3. A gear quality testing platform according to claim 1, characterized in that: The outer diameters of the rotating wheels of the multiple sets of rotating contact wheels are inconsistent, and the outer diameters of the rotating wheels are larger than the spacing between two teeth of the detected gear.

4. A gear quality testing platform according to claim 1, characterized in that: The outer diameters of the upper end of the first conical top sleeve and the lower end of the second conical top sleeve are smaller than the inner diameter of the inner hole of the detection gear, and the outer diameters of the lower end of the first conical top sleeve and the upper end of the second conical top sleeve are larger than the outer diameter of the inner hole of the detection gear.

5. The gear quality testing platform according to claim 1, characterized in that: The first detection circuit includes an electrically connected resistor, an adjustable resistor, a voltmeter, a transistor, and a buzzer. One ends of the two adjustable resistors are connected, the other end of the first adjustable resistor is connected to one end of the first resistor and the positive power input end of the voltmeter, the other end of the second adjustable resistor is connected to one end of the second resistor and one end of the third resistor, the other end of the first resistor is connected to the other end of the second resistor and the emitters of the two transistors, the other end of the third resistor is connected to the base of the first transistor, the collector of the first transistor is connected to one end of the fourth resistor and the base of the second transistor, the collector of the second transistor is connected to the negative power input end of the buzzer, and the other end of the fourth resistor is connected to the positive power input end of the buzzer.

6. A gear quality testing platform according to claim 1, characterized in that: The second detection circuit includes an electrically connected resistor, an adjustable resistor, a transistor, and a buzzer. One end of the first adjustable resistor is connected to one end of the first resistor and one end of the second resistor, the other end of the second resistor is connected to the base of the first transistor, the collector of the first transistor is connected to one end of the third resistor and the base of the second transistor, the collector of the second transistor is connected to the negative power input end of the buzzer, the other end of the third resistor is connected to the positive power input end of the buzzer, and the other end of the first resistor is connected to the emitters of the two transistors.

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