Lubricating oil quality detection device
By using an energy storage spring to store changes in elastic potential energy to detect lubricating oil quality, the problem of detection errors caused by reduced friction and frequent replacement of vulnerable parts has been solved, achieving accurate and low-cost lubricating oil testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-05
- Publication Date
- 2026-03-24
AI Technical Summary
Existing lubricating oil quality testing devices suffer from reduced initial friction between the friction wheel and friction rod due to friction, leading to increased errors in the testing results. Furthermore, they require frequent replacement of wear parts, resulting in high costs, and the results are ranges rather than precise values.
The quality of lubricating oil is measured by storing the change in elastic potential energy using an energy storage spring. A servo motor drives the friction wheel to contact the friction rod, and pressure and contact sensors are used to detect changes in friction force, thus avoiding the influence of friction force on the final result and reducing the frequency of replacement of vulnerable parts.
This approach achieves greater accuracy and lower costs in lubricant quality measurement, avoids the impact of frictional changes on test results, and reduces the frequency of replacement of vulnerable parts and lubricant waste.
Smart Images
Figure CN121720918A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of lubricating oil quality detection, and particularly relates to a lubricating oil quality detection device. BACKGROUND
[0002] Lubricating oil is an important industrial product, which is often used in various mechanical transmission mechanisms and can effectively reduce the friction intensity in mechanical equipment. In order to ensure that the selected lubricating oil is suitable for the required use scene, the quality of the lubricating oil is detected. The existing lubricating oil quality detection device is composed of a power equipment, a friction equipment and a counterweight equipment. In the use process, the power equipment drives the friction wheel to rotate and rubs with the friction rod. Then, the lubricating oil to be detected is infiltrated into the friction wheel, so that the contact position between the friction wheel and the friction rod can be filled with the lubricating oil. Then, the weight is increased on the counterweight equipment, so as to increase the acting force between the friction wheel and the friction rod. Until the friction wheel stops rotating, the total mass of the weight is recorded. The higher the total mass is, the higher the quality of the lubricating oil is. This detection method can quickly detect the quality of the lubricating oil. However, there are still some limitations in the actual use process.
[0003] The initial friction force between the friction wheel and the friction rod is reduced under the action of friction after the device is used, thereby affecting the subsequent detection result, so that the subsequent detection result is greater than the actual result, and the error value continuously increases with time. If this point needs to be avoided, the friction wheel and the friction rod need to be replaced constantly, which also increases the use cost of the equipment. In addition, the use of the weight causes the final result to be a range rather than an accurate value. To this end, the application file proposes a lubricating oil quality detection device to solve the problems of the traditional equipment that the result is a range and the initial friction force affecting the detection result. SUMMARY
[0004] The application proposes a lubricating oil quality detection device, which has the advantages of accurate result and low use cost, to solve the problem that the result obtained by the traditional equipment is a range and the initial friction force affects the detection result.
[0005] To achieve the above purpose, the application adopts the following technical scheme: a lubricating oil quality detection device, comprising a bottom plate, a bearing box is arranged on the top of the bottom plate, a servo motor is fixedly installed on the top of the bottom plate and close to the bearing box, a driving wheel is arranged on one end of the output shaft of the servo motor, a rotating device is movably arranged in the bearing box and close to the front end, a slot-shaped sliding rail is arranged on one side of the bearing box, a stroke device is movably installed on one side of the slot-shaped sliding rail, an adjusting device is fixedly installed on the top of the bottom plate and located at the rear side of the stroke device, a lifting machine is fixedly installed on the top of the bottom plate and located at the front side of the stroke device, the lifting machine can be telescopicly moved up and down, and a contact device is arranged on the top of the bottom plate and located at the front side of the lifting machine.
[0006] Furthermore, the rotating device includes a rotating shaft, which is movably connected to the bearing box via a bearing. A driven wheel is fixedly installed at one end of the rotating shaft, and a friction wheel is fixedly installed at the other end of the rotating shaft.
[0007] Furthermore, the travel device includes a mounting plate, a slider is provided on the back of the mounting plate, a first connecting plate is fixedly mounted at the end of the mounting plate, a pressing rod is fixedly mounted on the front of the first connecting plate, the pressing rod is in contact with the adjusting device, a side plate is fixedly mounted at the front of the mounting plate, a pressure sensor is provided on the back of the side plate, a circular hole is opened on the front of the side plate, and a sliding rod is movably mounted inside the circular hole, a connecting seat is fixedly mounted at the front of the sliding rod, a friction rod is fixedly mounted at the front of the connecting seat, a tail plate is fixedly mounted at the end of the sliding rod, and an energy storage spring is provided on the front of the tail plate at a position outside the sliding rod. One end of the energy storage spring is in contact with the pressure sensor. When the tail plate moves towards the side plate, the energy storage spring is compressed and squeezes the pressure sensor, so that the pressure sensor can sense the pressure generated by the deformation of the energy storage spring in real time.
[0008] Furthermore, the adjustment device includes a vertical plate, which is fixedly installed on the top of the base plate. A bushing is fixedly installed on the front of the vertical plate. The bushing has a central hole at its front end, and a ratchet is provided inside the central hole. A turntable is movably fitted on the outer surface of the bushing. A pressure rod is fixedly installed on the outer surface of the turntable. A rotating shaft is movably fitted inside the central hole at the front end of the bushing. A ratchet is fixedly installed on one side of the rotating shaft. The ratchet engages with the ratchet teeth and can rotate clockwise without resetting. A second connecting plate is provided on the other side of the rotating shaft. A handle is fixedly installed on one side of the second connecting plate. A transmission spring is provided on the other side of the second connecting plate, located outside the rotating shaft. One end of the transmission spring is connected to the turntable. When the handle is pulled outward, the ratchet disengages from the ratchet teeth, and the ratchet can be reset.
[0009] Furthermore, the driving wheel is connected to the driven wheel via a transmission belt. When the servo motor is running, the driven wheel is driven to rotate by the transmission effect of the driving wheel and the belt pulley, which in turn drives the friction wheel to rotate. The pressure rod is in contact with the lower pressure rod, and the friction wheel is in contact with the bottom surface of the friction rod. During the rotation of the friction wheel, the friction force drives the friction rod to move synchronously.
[0010] Furthermore, an oil tank is fixedly installed on the top of the lifting machine, and the oil tank contains lubricating oil to be tested.
[0011] Furthermore, the contact device includes an adjustment groove, an adjustment screw is movably fitted inside the adjustment groove, an adjustment plate is movably fitted on the outer surface of the adjustment screw through a threaded engagement, the adjustment plate slides in engagement with the adjustment groove, and a contact sensor is fixedly installed on the front side of the adjustment plate.
[0012] Furthermore, the contact sensor and the friction rod are aligned in the lateral direction, and the friction rod will eventually come into contact with the contact sensor during the lateral movement.
[0013] Furthermore, the output terminal of the contact sensor is connected to the input terminal of the hoist via a signal connection.
[0014] This application has the following beneficial effects.
[0015] This invention uses the change in elastic potential energy stored in an energy storage spring to measure the quality of lubricating oil, resulting in more accurate measurement results. Furthermore, the change in the initial frictional force between the friction rod and the friction wheel does not affect the final result. That is, after long-term use, the decrease in the initial frictional force between the friction rod and the friction wheel due to friction will not affect the experimental results. This means that the device does not need to frequently replace the two vulnerable parts, the friction wheel and the friction rod, and can also avoid the friction wheel being over-wetted, which would lead to excessive consumption of lubricating oil. Attached Figure Description
[0016] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles disclosed in this application.
[0017] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein: Figure 1 This is a structural diagram of the present invention; Figure 2 This is a diagram of the structural travel device of the present invention; Figure 3 This is an anatomical diagram of the structural stroke device of the present invention; Figure 4 This is a diagram of the structural adjustment device of the present invention; Figure 5 This is an anatomical diagram of the structural adjustment device of the present invention; Figure 6 This is a diagram of the rotating device structure of the present invention; Figure 7 This is a diagram of the contact device structure of the present invention.
[0018] In the diagram: 1. Base plate; 2. Carrier box; 3. Servo motor; 4. Drive wheel; 5. Rotating device; 51. Rotating shaft; 52. Driven wheel; 53. Friction wheel; 6. Groove slide rail; 7. Stroke device; 71. Mounting plate; 72. Slider; 73. First connecting plate; 74. Down pressure rod; 75. Side plate; 76. Pressure sensor; 77. Slide rod; 78. Connecting seat; 79. Friction rod; 701. Tail plate; 702. Energy storage spring; 8. Adjusting device; 81. Vertical plate; 82. Bushing; 83. Ratchet; 84. Turntable; 85. Pressure rod; 86. Rotating shaft; 87. Ratchet; 88. Second connecting plate; 89. Handle; 801. Transmission spring; 9. Lifting machine; 10. Contact device; 101. Adjusting groove; 102. Adjusting screw; 103. Adjusting plate; 104. Contact sensor; 11. Oil tank. Detailed Implementation
[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0020] A lubricating oil quality testing device, please refer to Figure 1 The system includes a base plate 1, a bearing box 2 on the top of the base plate 1, a servo motor 3 fixedly installed on the top of the base plate 1 near the bearing box 2, a drive wheel 4 on one end of the output shaft of the servo motor 3, a rotating device 5 movably fitted inside the bearing box 2 near the front end, a grooved slide rail 6 on one side of the bearing box 2, a stroke device 7 movably installed on one side of the grooved slide rail 6, an adjusting device 8 fixedly installed on the top of the base plate 1 behind the stroke device 7, a lifting machine 9 fixedly installed on the top of the base plate 1 in front of the stroke device 7, the lifting machine 9 can move up and down, and a contact device 10 is provided on the top of the base plate 1 in front of the lifting machine 9.
[0021] Please see Figures 1-2 The rotating device 5 includes a rotating shaft 51, which is movably connected to the bearing box 2 via a bearing. A driven wheel 52 is fixedly installed at one end of the rotating shaft 51, and a friction wheel 53 is fixedly installed at the other end of the rotating shaft 51.
[0022] Please see Figure 1 and Figures 3-4The stroke device 7 includes a mounting plate 71, a slider 72 on the back of the mounting plate 71, a first connecting plate 73 fixedly mounted at the end of the mounting plate 71, a pressing rod 74 fixedly mounted on the front of the first connecting plate 73, the pressing rod 74 contacting the adjusting device 8, a side plate 75 fixedly mounted at the front of the mounting plate 71, a pressure sensor 76 on the back of the side plate 75, a circular hole on the front of the side plate 75, and a sliding rod 77 movably mounted inside the circular hole, with a connecting rod fixedly mounted at the front end of the sliding rod 77. The connecting seat 78 has a friction rod 79 fixedly installed at its front end and a tail plate 701 fixedly installed at the end of the slide rod 77. An energy storage spring 702 is provided on the front of the tail plate 701 at a position outside the slide rod 77. One end of the energy storage spring 702 is in contact with the pressure sensor 76. When the tail plate 701 moves toward the side plate 75, the energy storage spring 702 is compressed and squeezes the pressure sensor 76, so that the pressure sensor 76 can sense the pressure generated by the deformation of the energy storage spring 702 in real time.
[0023] Since the device uses the change in friction to detect the quality of lubricating oil, the change in the initial friction between the friction rod 79 and the friction wheel 53 does not affect the final result. That is, after long-term use, the decrease in the initial friction between the friction rod 79 and the friction wheel 53 due to friction will not affect the experimental results. This means that the device does not need to frequently replace the two vulnerable parts, the friction wheel 53 and the friction rod 79, thus reducing the cost of using the device and improving its practicality.
[0024] Please see Figure 1 and Figures 5-6 The adjusting device 8 includes a vertical plate 81, which is fixedly installed on the top of the base plate 1. A bushing 82 is fixedly installed on the front of the vertical plate 81. A central hole is opened at the front end of the bushing 82, and a ratchet 83 is provided inside the central hole. A turntable 84 is movably fitted on the outer surface of the bushing 82. A pressure rod 85 is fixedly installed on the outer surface of the turntable 84. A rotating shaft 86 is movably fitted inside the central hole at the front end of the bushing 82. A ratchet 87 is fixedly installed on one side of the rotating shaft 86. The ratchet 87 is engaged with the ratchet 83. The ratchet 87 can rotate clockwise and cannot be reset. A second connecting plate 88 is provided on the other side of the rotating shaft 86. A handle 89 is fixedly installed on one side of the second connecting plate 88. A transmission spring 801 is provided on the other side of the second connecting plate 88, located outside the rotating shaft 86. One end of the transmission spring 801 is connected to the turntable 84. When the handle 89 is pulled outward, the ratchet 87 is disengaged from the ratchet 83, and the ratchet 87 can be reset at this time.
[0025] Please see Figures 1-6The drive wheel 4 is connected to the driven wheel 52 via a transmission belt. When the servo motor 3 is running, the driven wheel 52 is driven to rotate by the transmission effect of the drive wheel 4 and the belt pulley, which in turn drives the friction wheel 53 to rotate. The pressure rod 85 is in contact with the lower pressure rod 74, and the friction wheel 53 is in contact with the bottom surface of the friction rod 79. During the rotation of the friction wheel 53, the friction force drives the friction rod 79 to move synchronously.
[0026] When the friction wheel 53 rotates, if the friction between the friction wheel 53 and the friction rod 79 is insufficient to drive the friction rod 79 to the position of contact sensor 104, the handle 89 can be turned clockwise to transmit torque to the turntable 84 through the transmission spring 801. Since the pressure rod 85 is in contact with the lower pressure rod 74, the turntable 84 transmits torque to the lower pressure rod 74 through the pressure rod 85, so that the lower pressure rod 74 receives a downward pressure force and increases the pressure at the contact position between the friction rod 79 and the friction wheel 53, thereby increasing the friction between the two. This ensures that the friction rod 79 can move to the position of contact sensor 104 during the rotation of the friction wheel 53, ensuring that the lifting machine 9 can be stably activated and that the friction wheel 53 can contact the lubricating oil inside the oil tank 11, so that subsequent detection operations can be carried out normally, thus improving the stability of the device during operation.
[0027] Please see Figure 1 An oil tank 11 is fixedly installed on the top of the lifting machine 9, and the inside of the oil tank 11 contains lubricating oil to be tested.
[0028] Please see Figure 7 The contact device 10 includes an adjustment groove 101, an adjustment screw 102 is movably sleeved inside the adjustment groove 101, and an adjustment plate 103 is movably sleeved on the outer surface of the adjustment screw 102 by means of threaded engagement. The adjustment plate 103 is slidably engaged with the adjustment groove 101, and a contact sensor 104 is fixedly installed on the front side of the adjustment plate 103.
[0029] When the device detects the quality of the lubricating oil, the servo motor 3 is activated, and through the drive wheel 4, driven wheel 52, and transmission belt, the friction wheel 53 is driven to rotate. Since the friction wheel 53 is in contact with the bottom surface of the friction rod 79, during its rotation, the frictional force causes the friction rod 79 to move closer to the contact sensor 104, eventually bringing the friction rod 79 into contact with the contact sensor 104. At this point, the output of the contact sensor 104 is connected to the input of the lifting machine 9 via a signal connection, causing the lifting machine 9 to lift the oil tank 11, bringing the lubricating oil to be tested inside the oil tank 11 into contact with the friction wheel 53, thus achieving the detection of the contact surface between the friction wheel 53 and the friction rod 79. Lubrication reduces friction between the two components, disrupting the balance between the stored elastic force of the energy storage spring 702 and the frictional force. This releases the stored elastic force, causing the friction rod 79 to return to its original position. Once the friction rod 79 stabilizes, the pressure sensor 76 detects the pressure change in the energy storage spring 702, thus determining the quality of the lubricating oil. When the lubricating oil quality is good, the remaining elastic potential energy after the energy storage spring 702 releases its force is low, and the pressure sensor 76 detects a larger pressure change. Conversely, when the lubricating oil quality is poor, the remaining elastic potential energy after the energy storage spring 702 releases its force is high, and the pressure sensor 76 detects a smaller pressure change. This process allows the device to determine the quality of the lubricating oil, improving its practicality.
[0030] Please see Figure 4 and Figure 7 The contact sensor 104 and the friction rod 79 are aligned in the lateral direction, and the friction rod 79 will eventually come into contact with the contact sensor 104 during the lateral movement.
[0031] When the quality of the lubricating oil is good, the elastic potential energy stored in the energy storage spring 702 may be completely released after the contact point between the friction wheel 53 and the friction rod 79 is lubricated, making it impossible to accurately detect the quality of the lubricating oil. In this case, the position of the adjusting plate 103 can be adjusted by rotating the adjusting screw 102 through the thread drive, which increases the distance between the friction rod 79 and the contact sensor 104. At the same time, rotating the handle 89 clockwise increases the friction between the friction rod 79 and the friction wheel 53. This increases the elastic potential energy stored in the energy storage spring 702 when the friction rod 79 contacts the contact sensor 104. Thus, even after being lubricated again, the energy storage spring 702 still stores residual potential energy after releasing its elastic potential energy, ensuring the accuracy of the detection and improving the practicality of the device.
[0032] Please see Figure 1 and Figure 7 The output of the contact sensor 104 is connected to the input of the hoist 9 via a signal connection.
[0033] When the friction rod 79 comes into contact with the contact sensor 104, the height of the oil tank 11 is raised by the lifting machine 9 until the lubricating oil inside the oil tank 11 comes into contact with the lowest point of the friction wheel 53. As the friction wheel 53 rotates, the lubricating oil is evenly coated on the outer surface of the friction wheel 53. When the friction wheel 53 comes into contact with the lubricating oil and rotates half a turn, the friction between the friction wheel 53 and the friction rod 79 is reduced due to the influence of the lubricating oil. At this time, the friction rod 79 resets, causing the friction rod 79 to disengage from the contact sensor 104. At the same time, the lifting machine 9 stops lifting, thus preventing the friction wheel 53 from being over-wetted in the lubricating oil. This would prevent the inner and outer sides of the friction wheel 53 that do not participate in lubrication detection from coming into contact with the lubricating oil and being wetted, resulting in the waste of lubricating oil and improving the practicality of the device.
[0034] Traditional inventions use weights to adjust the friction between the rotating wheel and the friction rod to achieve the detection effect. However, the weights cause the friction between the rotating wheel and the friction rod to increase non-linearly, and the final result is not a precise value, but rather within a certain range. The detection method used in this application avoids this problem well. By utilizing the change in elastic potential energy of the energy storage spring 702, the lubrication quality of the lubricating oil can be accurately obtained, thus improving the reliability of the device.
[0035] The method of using this invention is as follows: When the device detects the quality of the lubricating oil, the servo motor 3 is activated, and through the drive wheel 4, driven wheel 52, and transmission belt, the friction wheel 53 is driven to rotate. Since the friction wheel 53 is in contact with the bottom surface of the friction rod 79, during its rotation, the frictional force causes the friction rod 79 to move closer to the contact sensor 104, eventually bringing the friction rod 79 into contact with the contact sensor 104. At this point, the output of the contact sensor 104 is connected to the input of the lifting machine 9 via a signal connection, causing the lifting machine 9 to lift the oil tank 11, bringing the lubricating oil to be tested inside the oil tank 11 into contact with the friction wheel 53, thus achieving the detection of the contact between the friction wheel 53 and the friction rod 79. The contact surfaces are lubricated, reducing the friction between them. This breaks the balance between the stored elastic force of the energy storage spring 702 and the frictional force, releasing the stored elastic force and causing the friction rod 79 to return to its original position. Once the friction rod 79 stabilizes, the pressure sensor 76 detects the pressure change in the energy storage spring 702, thus determining the quality of the lubricating oil. When the lubricating oil quality is good, the remaining elastic potential energy of the energy storage spring 702 after releasing its force is low, and the pressure sensor 76 detects a larger pressure change. Conversely, when the lubricating oil quality is poor, the remaining elastic potential energy of the energy storage spring 702 after releasing its force is high, and the pressure sensor 76 detects a smaller pressure change. This allows the device to determine the quality of the lubricating oil. The quality of lubricating oil is detected by measuring the change in frictional force. This means that changes in the initial frictional force between the friction rod 79 and the friction wheel 53 do not affect the final result. Even after prolonged use, the decrease in the initial frictional force between the friction rod 79 and the friction wheel 53 due to friction will not affect the experimental results. This eliminates the need for frequent replacement of these two easily worn parts, the friction wheel 53 and the friction rod 79. When the frictional force between the friction wheel 53 and the friction rod 79 is insufficient to drive the friction rod 79 to the contact sensor 104 during rotation, the handle 89 can be turned clockwise. This transmits torque to the turntable 84 via the transmission spring 801. Since the pressure rod 85 contacts the lower pressure rod 74, the turntable 84... The torque is transmitted to the lower pressure rod 74 via the pressure rod 85, causing the lower pressure rod 74 to receive a downward pressure force. This increases the pressure at the contact point between the friction rod 79 and the friction wheel 53, thereby increasing the friction between them. This ensures that during the rotation of the friction wheel 53, the friction rod 79 can move to the position of contacting the contact sensor 104, ensuring that the lifting machine 9 can be stably activated. The friction wheel 53 can contact the lubricating oil inside the oil tank 11, allowing subsequent testing operations to proceed normally. When the quality of the lubricating oil is good, the elastic potential energy stored in the energy storage spring 702 may be completely released after the contact point between the friction wheel 53 and the friction rod 79 is lubricated, making it impossible to accurately detect the quality of the lubricating oil. In this case, the adjusting screw 102 can be rotated.The position of the adjusting plate 103 is adjusted by a threaded drive, increasing the distance between the friction rod 79 and the contact sensor 104. Simultaneously, rotating the handle 89 clockwise increases the friction between the friction rod 79 and the friction wheel 53. This increases the elastic potential energy stored in the energy storage spring 702 after the friction rod 79 contacts the contact sensor 104, ensuring that even after lubrication, the energy storage spring 702 retains residual potential energy, guaranteeing detection accuracy. When the friction rod 79 contacts the contact sensor 104, the height of the oil tank 11 is raised by the lifting mechanism 9 until the lubricating oil inside the oil tank 11 contacts the lowest point of the friction wheel 53. As the friction wheel 53 rotates, the lubricating oil is evenly coated on its outer surface. When the friction wheel 53 contacts the lubricating oil and rotates half a turn… At this point, the friction force between the friction wheel 53 and the friction rod 79 decreases due to the lubricating oil. The friction rod 79 then resets, disengaging from the contact sensor 104. Simultaneously, the lifting machine 9 stops lifting, thus preventing the friction wheel 53 from being overly immersed in the lubricating oil. This avoids the inner and outer surfaces of the friction wheel 53, which are not involved in lubrication detection, from contacting and being immersed in the lubricating oil, resulting in wasted lubricating oil. Traditional inventions use weights to adjust the friction force between the wheel and the friction rod to achieve the detection effect. However, the weights cause the friction force between the wheel and the friction rod to increase non-linearly, resulting in a result that is not a precise value but rather falls within a certain range. The detection method used in this application effectively avoids this problem. By utilizing the change in the elastic potential energy of the energy storage spring 702, the lubrication quality of the lubricating oil can be accurately obtained.
Claims
1. A lubricating oil quality testing device, characterized in that, The system includes a base plate (1), a bearing box (2) is provided on the top of the base plate (1), a servo motor (3) is fixedly installed on the top of the base plate (1) near the bearing box (2), a drive wheel (4) is provided at one end of the output shaft of the servo motor (3), a rotating device (5) is movably sleeved inside the bearing box (2) near the front end, a grooved slide rail (6) is provided on one side of the bearing box (2), a stroke device (7) is movably installed on one side of the grooved slide rail (6), an adjusting device (8) is fixedly installed on the top of the base plate (1) at the position behind the stroke device (7), a lifting machine (9) is fixedly installed on the top of the base plate (1) at the position in front of the stroke device (7), and a contact device (10) is provided on the top of the base plate (1) at the position in front of the lifting machine (9).
2. The lubricating oil quality testing device according to claim 1, characterized in that, The rotating device (5) includes a rotating shaft (51), which is movably connected to the bearing box (2) through a bearing. A driven wheel (52) is fixedly installed at one end of the rotating shaft (51), and a friction wheel (53) is fixedly installed at the other end of the rotating shaft (51).
3. The lubricating oil quality testing device according to claim 2, characterized in that, The stroke device (7) includes a mounting plate (71), a slider (72) is provided on the back of the mounting plate (71), a first connecting plate (73) is fixedly installed at the end of the mounting plate (71), a pressing rod (74) is fixedly installed on the front of the first connecting plate (73), the pressing rod (74) is in contact with the adjusting device (8), a side plate (75) is fixedly installed at the front end of the mounting plate (71), a pressure sensor (76) is provided on the back of the side plate (75), and the side plate (75) is fixedly installed on the back of the side plate (75). 5) has a circular hole on its front side, and a slide rod (77) is movably installed inside the circular hole. A connecting seat (78) is fixedly installed at the front end of the slide rod (77), and a friction rod (79) is fixedly installed at the front end of the connecting seat (78). A tail plate (701) is fixedly installed at the end of the slide rod (77). An energy storage spring (702) is provided on the front side of the tail plate (701) at a position outside the slide rod (77). One end of the energy storage spring (702) is in contact with the pressure sensor (76).
4. The lubricating oil quality testing device according to claim 3, characterized in that, The adjusting device (8) includes a vertical plate (81), which is fixedly installed on the top of the base plate (1). A bushing (82) is fixedly installed on the front of the vertical plate (81). A central hole is opened at the front end of the bushing (82), and a ratchet (83) is provided inside the central hole. A turntable (84) is movably fitted on the outer surface of the bushing (82). A pressure rod (85) is fixedly installed on the outer surface of the turntable (84). A pressure rod (85) is movably fitted inside the central hole at the front end of the bushing (82). There is a rotating shaft (86), and a ratchet (87) is fixedly installed on one side of the rotating shaft (86). The ratchet (87) is engaged with the ratchet tooth (83). A second connecting plate (88) is provided on the other side of the rotating shaft (86). A handle (89) is fixedly installed on one side of the second connecting plate (88). A transmission spring (801) is provided on the other side of the second connecting plate (88) at a position outside the rotating shaft (86). One end of the transmission spring (801) is connected to the turntable (84).
5. The lubricating oil quality testing device according to claim 4, characterized in that, The driving wheel (4) is connected to the driven wheel (52) via a transmission belt, the pressure rod (85) is in contact with the lower pressure rod (74), and the friction wheel (53) is in contact with the bottom surface of the friction rod (79).
6. The lubricating oil quality testing device according to claim 1, characterized in that, An oil tank (11) is fixedly installed on the top of the lifting machine (9), and the oil tank (11) contains lubricating oil to be tested.
7. The lubricating oil quality testing device according to claim 1, characterized in that, The contact device (10) includes an adjustment groove (101), an adjustment screw (102) is movably sleeved inside the adjustment groove (101), an adjustment plate (103) is movably sleeved on the outer surface of the adjustment screw (102) by means of threaded engagement, the adjustment plate (103) is slidably engaged with the adjustment groove (101), and a contact sensor (104) is fixedly installed on the front side of the adjustment plate (103).
8. The lubricating oil quality testing device according to claim 7, characterized in that, The contact sensor (104) is aligned with the friction rod (79) in the lateral direction, and the friction rod (79) will eventually come into contact with the contact sensor (104) during the lateral movement.
9. A lubricating oil quality testing device according to claim 7, characterized in that, The output of the contact sensor (104) is connected to the input of the lifting machine (9) via a signal connection.