Device and method for detecting braking performance of speed reducer brake

Abstract

The invention provides a speed reducer brake braking performance detection device and detection method, and belongs to the technical field of brake performance detection. The technical problems that in the prior art, in the brake performance detection process of the speed reducer brake, operation difficulty and labor intensity of workers are large, and misjudgment risks exist in detection are solved. According to the technical scheme, the brake performance detection device for the speed reducer brake comprises an air pressure regulating filter and a pneumatic booster pump, the input end of the air pressure regulating filter is connected with one end of an air pipe I, and the other end of the air pipe I is a low-pressure compressed air input port; the output end of the air pressure regulating filter is connected with the input end of the pneumatic booster pump through a second air pipe, and the output end of the pneumatic booster pump is sequentially provided with a second one-way valve, a manual ball valve, a digital display pressure gauge and an unloading valve. The method has the beneficial effects that a quantitative detection process of the brake performance of the speed reducer brake can be converted into a qualitative feedback process of a constant-torque wrench signal, and finally, convenient, reliable and efficient brake performance detection is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of brake detection, and particularly to a detection device and method for the braking performance of a reducer brake. Background Art

[0002] A gear reducer mainly consists of planet gears, a sun gear, an internal gear ring, a brake, etc. Compared with other types of reducers, the gear reducer has the characteristics of compact structure, small volume, high rigidity, large transmission torque, high transmission efficiency, small backlash, high transmission accuracy, low noise, and long service life, so it is widely used in industries such as numerical control machine tools, industrial robots, construction machinery, printing equipment, packaging machinery, and environmental protection.

[0003] The opening pressure of the reducer brake is a key detection and control parameter reflecting its braking performance. If the opening pressure is too high, it will cause faults such as jamming, abnormal noise, and discontinuous rotation during the operation of the reducer; if the opening pressure is too low, it will cause faults such as the inability to lock the rotary motion of the reducer and large swing, and at the same time, the safety factor of the application system will be reduced. The magnitude of the brake opening pressure is comprehensively affected by factors such as the free height of the disc spring, the thickness and number of adjustment gaskets, the machining dimensions of the connecting plate, and the cumulative assembly error. Therefore, it is particularly important to detect and control the opening pressure of the reducer brake for its braking performance.

[0004] The prior art is to detect and control the braking performance of the brake during the test process of the reducer. It is necessary to assemble the hydraulic motor, two-way balance valve, and brake oil pipe (i.e., assemble into a finished reducer) before detection. Use a crane to lift and fix the finished reducer on the test bench, then connect the oil inlet and outlet of the two-way balance valve to the test oil pipe and start the hydraulic test bench. One-way hydraulic oil is transmitted through the two-way balance valve to the hydraulic motor to provide power and drive the sun gear to rotate uniformly; the other-way hydraulic oil enters the sealed area between the upper and lower combined seals of the piston through the brake oil pipe and pushes the piston upward. The disc spring is compressed and the friction plate is loosened. At this time, observe the dynamic numerical change of the pressure acquisition of the hydraulic test bench to determine whether the opening pressure range meets the requirements, and then judge whether its braking performance meets the requirements.

[0005] During the test process, when the opening pressure of the brake shows too high or too low, it is necessary to remove the hydraulic motor, two-way balance valve, and brake oil pipe completely, reduce or increase the number of adjustment gaskets and then reassemble them into a finished reducer, and then fix it on the hydraulic test bench for opening pressure detection. If the opening pressure is still too high or too low, it is necessary to repeat and frequently disassemble, assemble and test, and finally control the opening pressure within a reasonable range by adjusting the actual compression amount of the disc spring, so as to achieve braking performance control.

[0006] Therefore, the detection of the braking performance of the brake in the prior art has the following defects:

[0007] (1) The finished speed reducer is heavy, and it is difficult to operate during the processes of manual lifting, transferring, and fixing, posing potential safety hazards.

[0008] (2) The opening pressure of the test bench is dynamically changing. It is risky to misjudge when observing the pressure fluctuation manually for a long time.

[0009] (3) During the process of adjusting the opening pressure, it is necessary to repeatedly and frequently disassemble and assemble components for testing, resulting in high labor intensity and low efficiency for personnel.

[0010] (4) It is impossible to detect and control the opening pressure in the semi-finished state of the speed reducer.

[0011] (5) The test medium is hydraulic oil. After the test, it is necessary to manually wipe the oil stain on the surface of the workpiece, increasing the labor load of personnel. Summary of the Invention

[0012] The purpose of the present invention is to overcome the problems in the background technology and provide a device and method for detecting the braking performance of a speed reducer brake.

[0013] The guiding ideology of the present invention is as follows: Advance the detection of the braking performance of the speed reducer to the assembly process for control. Use adjustable high-pressure compressed air as the detection medium, and finally convert the adjusted opening pressure value (quantitative) of the speed reducer into a signal feedback (qualitative) of a digital display torque wrench. On the premise of not requiring repeated and frequent disassembly and assembly of components, flexibly realize the rapid discrimination of the braking performance of the speed reducer. The whole detection process reduces the operation difficulty and labor intensity of personnel and improves the detection efficiency of the braking performance.

[0014] To achieve the above-mentioned invention purpose, the technical solution adopted by the present invention is specifically as follows: A device for detecting the braking performance of a speed reducer brake includes a moving trolley, an air pressure regulating filter, and a pneumatic booster pump arranged on the moving trolley. The input end of the air pressure regulating filter is connected to one end of an air pipe I. The other end of the air pipe I is a low-pressure compressed air input port. An air pipe switch valve is installed on the air pipe I. The output end of the air pressure regulating filter is connected to the input end of the pneumatic booster pump through an air pipe II. The output end of the pneumatic booster pump is successively installed with a check valve II, a manual ball valve, a digital display pressure gauge, a relief valve, and a rubber pipe. A quick connector is installed at the end of the rubber pipe away from the relief valve. The quick connector is used to connect to the input oil port of the speed reducer brake.

[0015] It further includes a coupling and a digital display torque wrench. One end of the coupling is sleeved on the wrench head of the digital display torque wrench, and the other end is inserted into the sun gear keyway of the speed reducer brake.

[0016] Further, a check valve I is installed on the air pipe II.

[0017] The present invention also provides a method for detecting the braking performance of a speed reducer, including the following steps:

[0018] S1. Move the mobile trolley next to the decelerator brake, connect the quick connector to the input oil port of the decelerator brake, connect the low-pressure compressed air input port of the first air pipe to the factory air source, and open the manual ball valve.

[0019] S2. Open the air pipe switch valve, and the low-pressure compressed air enters the air pressure regulating filter for filtering and drying. The dried low-pressure compressed air passes through the pneumatic booster pump, and the pneumatic booster pump boosts the low-pressure compressed air to high-pressure compressed air.

[0020] S3. Rotate the knob of the air pressure regulating filter to adjust the digital display pressure gauge reading to be equal to the lower limit value of the decelerator brake opening pressure.

[0021] S4. Close the manual ball valve and observe whether the digital display pressure gauge reading is stable. If it is stable, go to step S5. If it is not stable, open the manual ball valve and readjust the pressure value until the digital display pressure gauge reading remains stable.

[0022] S5. Insert one end of the coupling into the sun gear drive key position of the decelerator brake, and the other end is fitted with the wrench head of the digital display torque wrench. Then set the alarm torque value of the digital display torque wrench.

[0023] S6. Manually drive the digital display torque wrench to rotate circumferentially in both forward and reverse directions, observe whether it alarms during the rotation of the digital display torque wrench, and select to execute step S7 or step S8 according to the observation result.

[0024] S7. If it alarms, open the unloading valve to discharge the high-pressure gas inside the decelerator brake, then open the manual ball valve and close the unloading valve, readjust the lower limit value of the decelerator brake opening pressure, the lower limit value is less than the digital display pressure gauge reading, and the digital display pressure gauge reading does not exceed the upper limit value of the decelerator brake opening pressure, and repeat the content of step S4.

[0025] Then drive the digital display torque wrench to rotate in both forward and reverse directions again and observe whether it alarms: if it alarms, determine that the braking performance of the decelerator brake is unqualified; if it does not alarm, determine that the braking performance of the decelerator brake is qualified.

[0026] S8. If it does not alarm, open the unloading valve to discharge the high-pressure gas inside the decelerator brake, then open the manual ball valve and close the unloading valve, readjust the digital display pressure gauge reading to be lower than the lower limit value of the decelerator brake opening pressure, and repeat step S4.

[0027] Then drive the digital display torque wrench to rotate in both forward and reverse directions again and observe whether it alarms: if it alarms, determine that the braking performance of the decelerator brake is qualified; if it does not alarm, determine that the braking performance of the decelerator brake is unqualified.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] 1. In the technical solution of the present invention, the pre-control of the braking performance detection of the speed reducer mechanism is in the semi-finished assembly state. The detection medium is converted from hydraulic oil to adjustable high-pressure compressed air, and finally from quantitative analysis to qualitative analysis, realizing flexible and fast braking performance detection. On the premise of ensuring product quality and safety, the labor intensity of personnel is greatly reduced, the detection operation efficiency is improved, and a feasible method for qualitative conversion is provided for the detection of key parameters of the pressure control system.

[0030] 2. The key point of the present invention is to use adjustable high-pressure compressed air instead of hydraulic oil as the medium to open the speed reducer brake. By identifying the signal feedback of the torque wrench, the rapid detection process of the braking performance of the speed reducer brake on the assembly line is realized. The method of the present invention converts the quantitative detection process of the braking performance of the speed reducer brake into a qualitative feedback process of the torque wrench signal, and finally realizes convenient, reliable and efficient braking performance detection.

[0031] 3. The invention scheme is that under the premise that the hydraulic motor, two-way balance valve and brake oil pipe are not assembled on the speed reducer, that is, the semi-finished product of the speed reducer assembly, adjustable high-pressure compressed air is used as the test medium for opening the piston opening pressure. The lower limit value of the opening pressure required by the piston is set, and the digital display torque wrench is set with a reasonable alarm torque. The sun gear of the speed reducer is rotated uniformly by the connecting device, and whether the torque wrench alarms is observed during the rotation process, so as to realize the detection process of the braking performance of the speed reducer brake. The whole detection process can greatly reduce the labor intensity of personnel, improve the detection operation efficiency and the detection accuracy, and avoid the risk of misjudgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention.

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0034] Figure 2 It is a schematic diagram of the structure of the coupling.

[0035] Figure 3 It is a flowchart for judging the braking performance of the speed reducer brake.

[0036] Among them, the attached drawing reference numerals are: 1, low-pressure compressed air inlet; 2, pneumatic booster pump; 3, check valve I; 4, mobile trolley; 5, air pipe II; 6, check valve II; 7, unloading valve; 8, rubber hose; 9, reducer brake; 10, digital display torque wrench; 11, coupling; 12, quick connector; 13, digital display pressure gauge; 14, manual ball valve; 15, air pressure regulating filter; 16, air pipe I; 17, air pipe switch valve. Detailed implementation manners

[0037] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the attached drawings and embodiments. Certainly, the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] Embodiment

[0039] As Figure 1 - Figure 2 shown, this embodiment provides a device for detecting the braking performance of a reducer brake, and the main components and functions are described as follows:

[0040] Low-pressure compressed air inlet 1: provides low-pressure compressed air;

[0041] Pneumatic booster pump 2: boosts the input low-pressure gas into high-pressure gas required for piston opening;

[0042] Check valve I 3: prevents the backflow of low-pressure gas after input;

[0043] Mobile trolley 4: realizes the fast and flexible movement of the entire detection device;

[0044] Air pipe II 5: is used for connecting the output end of the air pressure regulating filter 15 and the input end of the pneumatic booster pump 2;

[0045] Check valve II 6: prevents the backflow of high-pressure gas after output;

[0046] Unloading valve 7: unloads and discharges the high-pressure gas inside the reducer brake 9;

[0047] Rubber hose 8: connects the components at the high-pressure gas output end;

[0048] Reducer brake 9: semi-finished reducer without motor, balance valve and brake oil pipe;

[0049] Digital display torque wrench 10: feeds back the signal of whether the braking performance is qualified;

[0050] Coupling 11: connects the output head of the digital display torque wrench and the sun gear drive key part, as Figure 2 shown;

[0051] Quick connector 12: quickly connects the component to be detected and the rubber hose;

[0052] Digital display pressure gauge 13: Displays the actual pressure value in the piston sealing area;

[0053] Manual ball valve 14: Intake air switch at the high-pressure output end;

[0054] Air pressure regulating filter 15: Dries, filters, and regulates low-pressure compressed air;

[0055] Air pipe one 16: Connects components at the low-pressure gas input and output ends;

[0056] Air pipe switch valve 17: Intake air switch for low-pressure compressed air.

[0057] Both the air pressure regulating filter 15 and the pneumatic booster pump 2 are installed on the mobile trolley 4. The input end of the air pressure regulating filter 15 is connected to one end of the air pipe one 16. The other end of the air pipe one 16 is the low-pressure compressed air input port 1 for connecting to the factory air source. An air pipe switch valve 17 is installed on the air pipe one 16. The output end of the air pressure regulating filter 15 is connected to the input end of the pneumatic booster pump 2 through the air pipe two 5. A check valve one 3 is installed on the air pipe two 5. The output end of the pneumatic booster pump 2 is successively installed with a check valve two 6, a manual ball valve 14, a digital display pressure gauge 13, and a relief valve 7. One end of the relief valve 7 away from the digital display pressure gauge 13 is connected to one end of the rubber hose 8. The other end of the rubber hose 8 is provided with a quick connector 12. The quick connector 12 is used to connect to the input oil port of the reducer brake 9. After the air pressure opens the reducer brake 9, close the manual ball valve 14. The detected value displayed by the digital display pressure gauge 13 is the actual opening pressure of the reducer brake 9.

[0058] The detection device also includes a coupling 11 and a digital display torque wrench 10. One end of the coupling 11 is sleeved on the wrench head of the digital display torque wrench 10, and the other end is inserted into the sun gear keyway of the reducer brake 9. When in use, sleeve one end of the coupling 11 on the wrench head of the digital display torque wrench 10, insert the other end into the sun gear keyway, turn the digital display torque wrench 10 forward and backward. The digital display torque wrench 10 drives the sun gear to rotate through the coupling 11, and the sun gear then drives the moving friction plate and the planetary gear train to rotate. Observe the numerical value and alarm situation of the digital display torque wrench 10 during the process. When the reducer brake 9 is fully opened, the actual value displayed by the digital display torque wrench 10 is the resistance to overcome the rotation of the planetary gear train.

[0059] In use, move the mobile trolley 4 with the complete set of detection devices to the side of the reducer brake 9, connect to the low-pressure compressed air input port 1 and input compressed air, open the air pipe switch valve 17, the low-pressure gas enters the air pressure regulating filter 15 through the first air pipe 16, and the filtered and dried compressed air flows through the three-way joint and the first one-way valve 3 respectively to the upper and lower input ports of the pneumatic booster pump 2. The pneumatic booster pump 2 boosts the low-pressure gas into the high-pressure gas required for the opening piston opening pressure. The high-pressure gas output from the output port 5 of the pneumatic booster pump 2 flows through the second one-way valve 6, the manual ball valve 14, the digital display pressure gauge 13, the unloading valve 7, the rubber hose 8 and the quick connector 12, and then enters the piston sealing area. Adjust the knob of the air pressure regulating filter 15 to make the reading of the digital display pressure gauge 13, that is, the actual opening pressure value of the reducer brake 9, and control the reducer within the range from the lower limit to the upper limit of the theoretical value of the brake opening pressure. Among them, a slightly lower deviation is allowed for the theoretical lower limit value of the opening pressure of the reducer brake 9, or a certain lower deviation safety margin is left at the beginning of the design;

[0060] Since the piston opening pressure has reached the specified range value, the piston of the reducer moves upward to press against the disc spring. The disc spring is compressed due to its elasticity, and the lower friction plate is loosened. Use the digital display torque wrench 10 to rotate the sun gear forward and backward through the connecting shaft. The digital display torque wrench 10 is preset with an alarm torque value in advance, and observe whether the digital display torque wrench 10 alarms;

[0061] If the brake performance test is unqualified, just remove the connecting disc, increase or decrease the number of adjusting gaskets, reinstall the connecting disc and then use the digital display torque wrench 10 to rotate until the brake performance of the reducer brake 9 is qualified. This process does not require repeated and frequent disassembly and assembly of the hydraulic motor, the two-way balance valve and the hydraulic oil pipe, reducing the labor load of the operator;

[0062] After the detection is completed, close the manual ball valve 14, and the high-pressure gas no longer enters the reducer brake 9. At this time, open the unloading valve 7, the gas in the sealing space of the reducer brake 9 flows out, remove the quick connector 12, and transfer the semi-finished product to the assembly station to continue the assembly.

[0063] As Figure 3 shown, the present invention also provides a method for detecting the braking performance of a reducer, and the steps are as follows:

[0064] The first step: Move the mobile trolley 4 to the side of the reducer brake 9, connect the quick connector 12 to the input oil port of the reducer brake 9, connect the low-pressure compressed air input port 1 of the first air pipe 16 to the factory air source, and open the manual ball valve 14;

[0065] The second step: Open the air pipe switch valve 17, the low-pressure compressed air enters the air pressure regulating filter 15 for filtering and drying, and the dried low-pressure compressed air passes through the pneumatic booster pump 2, and the pneumatic booster pump 2 boosts the low-pressure compressed air into high-pressure compressed air;

[0066] Step 3: Rotate the knob of the air pressure regulating filter 15 to adjust the reading of the digital display pressure gauge 13 to be equal to the lower limit value of the opening pressure of the reducer brake 9;

[0067] Step 4: Close the manual ball valve 14 and observe whether the reading of the digital display pressure gauge 13 is stable. If it is stable, proceed to step S5. If it is not stable, open the manual ball valve 14 and readjust the pressure value until the reading of the digital display pressure gauge 13 remains stable;

[0068] Step 5: Insert one end of the coupling 11 into the position of the sun gear drive key of the reducer brake 9, and the other end is fitted with the head of the digital display torque wrench 10, and set the alarm torque value of the digital display torque wrench 10;

[0069] Step 6: Manually drive the digital display torque wrench 10 to rotate circumferentially in both forward and reverse directions, observe whether it alarms during the rotation of the digital display torque wrench 10, and select to execute Step 7 or Step 8 according to the observation result;

[0070] Step 7: If it alarms, open the unloading valve 7 to discharge the high-pressure gas inside the reducer brake 9, then open the manual ball valve 14 and close the unloading valve 7, and readjust the lower limit value of the opening pressure of the reducer brake 9 < the reading of the digital display pressure gauge 13 ≤ the upper limit value of the opening pressure of the reducer brake 9, and repeat the content of Step 4;

[0071] Then drive the digital display torque wrench 10 to rotate in both forward and reverse directions again and observe whether it alarms: If it alarms, determine that the braking performance of the reducer brake 9 is unqualified; if it does not alarm, determine that the braking performance of the reducer brake 9 is qualified;

[0072] Step 8: If it does not alarm, open the unloading valve 7 to discharge the high-pressure gas inside the reducer brake 9, then open the manual ball valve 14 and close the unloading valve 7, and readjust the reading of the digital display pressure gauge 13 to be lower than the lower limit value of the opening pressure of the reducer brake 9, and repeat Step 4;

[0073] Then drive the digital display torque wrench 10 to rotate in both forward and reverse directions again and observe whether it alarms: If it alarms, determine that the braking performance of the reducer brake 9 is qualified; if it does not alarm, determine that the braking performance of the reducer brake 9 is unqualified.

[0074] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for detecting the braking performance of a speed reducer brake, characterized in that, It includes a mobile trolley (4), an air pressure regulating filter (15) and a pneumatic booster pump (2) arranged on the mobile trolley (4). The input end of the air pressure regulating filter (15) is connected to one end of an air pipe one (16), the other end of the air pipe one (16) is a low-pressure compressed air input port (1), an air pipe switch valve (17) is installed on the air pipe one (16), the output end of the air pressure regulating filter (15) is connected to the input end of the pneumatic booster pump (2) through an air pipe two (5), a check valve two (6), a manual ball valve (14), a digital display pressure gauge (13), a relief valve (7) and a rubber pipe (8) are sequentially installed at the output end of the pneumatic booster pump (2), a quick connector (12) is installed at the end of the rubber pipe (8) far away from the relief valve (7), and the quick connector (12) is used to connect with the input oil port of the reducer brake (9); It further includes a coupling (11) and a digital display torque wrench (10). One end of the coupling (11) is sleeved on the wrench head of the digital display torque wrench (10), and the other end is inserted into the sun gear keyway of the reducer brake (9).

2. The braking performance detection device of a speed reduction mechanism brake according to claim 1, characterized in that, A check valve one (3) is installed on the air pipe two (5).

3. A braking performance detection method, which is based on the braking performance detection device of a deceleration mechanism brake according to any one of claims 1-2, and is characterized in that, It includes the following steps: S1. Move the mobile trolley (4) beside the reducer brake (9), connect the quick connector (12) with the input oil port of the reducer brake (9), connect the low-pressure compressed air input port (1) of the air pipe one (16) with the factory air source, and open the manual ball valve (14); S2. Open the air pipe switch valve (17), the low-pressure compressed air enters the air pressure regulating filter (15) for filtering and drying, and the dried low-pressure compressed air passes through the pneumatic booster pump (2), and the pneumatic booster pump (2) boosts the low-pressure compressed air to high-pressure compressed air; S3. Rotate the knob of the air pressure regulating filter (15) to adjust the reading of the digital display pressure gauge (13) to be equal to the lower limit value of the opening pressure of the reducer brake (9); S4. Close the manual ball valve (14), observe whether the reading of the digital display pressure gauge (13) is stable. If it is stable, enter step S5. If it is not stable, open the manual ball valve (14) and readjust the pressure value until the reading of the digital display pressure gauge (13) remains stable; S5. Insert one end of the coupling (11) into the sun gear driving key position of the reducer brake (9), cooperate the other end with the wrench head of the digital display torque wrench (10), and then set the alarm torque value of the digital display torque wrench (10); S6. Manually drive the digital display torque wrench (10) to rotate circumferentially in both forward and reverse directions, observe whether it alarms during the rotation of the digital display torque wrench (10), and select to execute step S7 or step S8 according to the observation result; S7. If it alarms, open the relief valve (7) to discharge the high-pressure gas inside the reducer brake (9), then open the manual ball valve (14) and close the relief valve (7), readjust the lower limit value of the opening pressure of the reducer brake (9), the lower limit value is less than the reading of the digital display pressure gauge (13), and the reading of the digital display pressure gauge (13) does not exceed the upper limit value of the opening pressure of the reducer brake (9), and repeat the content of step S4; Then drive the digital display torque wrench (10) to rotate forward and backward and observe whether there is an alarm: if there is an alarm, it is determined that the braking performance of the reducer brake (9) is unqualified; if there is no alarm, it is determined that the braking performance of the reducer brake (9) is qualified; S8. If there is no alarm, open the unloading valve (7) to discharge the high-pressure gas inside the reducer brake (9), then open the manual ball valve (14) and close the unloading valve (7), and readjust the indication of the digital display pressure gauge (13) to be lower than the lower limit value of the opening pressure of the reducer brake (9), and repeat step S4; Then drive the digital display torque wrench (10) to rotate forward and backward and observe whether there is an alarm: if there is an alarm, it is determined that the braking performance of the reducer brake (9) is qualified; if there is no alarm, it is determined that the braking performance of the reducer brake (9) is unqualified.

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