Speed reducer rigidity detection device and use method thereof
By designing a gearbox rigidity detection device consisting of a base, motor, flange-type torque sensor, and displacement mechanism, the problem of insufficient shell rigidity detection was solved, the detection efficiency and transmission system accuracy were improved, and vibration and sealing failure caused by shell deformation were avoided.
Patent Information
- Application Number
- CN202511280341.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-09
- Publication Date
- 2025-11-21
AI Technical Summary
Existing gearbox rigidity testing devices neglect the importance of testing the rigidity of the gearbox housing, leading to problems such as housing deformation affecting gear meshing accuracy, reduced output accuracy, vibration and noise generation, and seal failure.
A detection device comprising a base, a motor, a flange-type torque sensor, a dial indicator, and a displacement mechanism was designed. By integrating and installing these components, the rigidity of the reducer housing is detected. The displacement mechanism and scale structure are used to measure the deformation of the housing and bearing seats at multiple locations, and to calculate the torque and force transmission path.
It enables intuitive detection of the rigidity of the reducer housing, improves detection efficiency, and can analyze whether the housing can withstand the torque and force transmitted by the internal gears, ensuring the accuracy and sealing of the transmission system.
Smart Images
Figure CN120992195A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of speed reducer testing equipment technology, specifically to a speed reducer rigidity testing device and its usage method. Background Technology
[0002] As a precision basic transmission device that uses mechanical transmission methods such as gears and worm gears to reduce speed and increase torque between prime mover and driven machine, speed reducer is an indispensable core component in modern industrial equipment. Correspondingly, rigidity testing before installation and use is also essential.
[0003] Most existing gearbox rigidity testing devices perform rigidity testing on the drive shaft and gears using laser rangefinders or dial indicators, neglecting the importance of testing the rigidity of the gearbox housing. As the external skeleton of the bearings and gears, if the housing rigidity is insufficient, elastic deformation will occur under load. This causes loss of gear meshing accuracy, leading to abnormal wear and damage. At the same time, the torsional stiffness and backlash of the gearbox are key indicators. Housing deformation will directly affect the gearbox output accuracy, making it unable to meet the requirements of high-precision applications. Furthermore, housing deformation will excite its natural frequency, generating additional vibration and noise. Finally, after the mating surface of the housing is deformed, the originally flat sealing surface will become uneven, which will lead to gearbox seal failure, resulting in lubricant leakage and contaminant intrusion.
[0004] In view of this, the present invention proposes a speed reducer rigidity detection device and its usage method to solve the problems existing in the prior art. Summary of the Invention
[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a speed reducer rigidity detection device and its usage method.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] A speed reducer rigidity testing device and its usage method include a base, a motor is installed on one side of the upper part of the base, and side plates are symmetrically arranged on the other side of the base. The side plates have horizontally opened slides and a displacement mechanism is installed inside. A dial indicator is installed on one side of the displacement mechanism. The output end of the motor is connected to one end of a flange-type torque sensor through a flange. The other end of the flange-type torque sensor is connected to the input shaft of the speed reducer through a flange. The output shaft of the speed reducer is connected to a fixed block through a flange. The bottom end of the fixed block is fixed to the top of the base. Scale structures are symmetrically arranged on both sides of the fixed block.
[0008] Preferably, the base has two symmetrically arranged first strip-shaped mounting holes and a second strip-shaped mounting hole on each side. The top of the first strip-shaped mounting hole is connected to the bottom corner of the motor by bolts, and the second strip-shaped mounting hole is connected to the bottom corner of the reducer by bolts.
[0009] Preferably, the outer wall of the input shaft abuts against the U-shaped groove of the reaction block, the bottom of the reaction block slides through the base, and the lower two sides of the reaction block slide against clamping plates. The two clamping plates are connected by bolts, and the bolts slide through the vertically opened locking holes of the reaction block.
[0010] Preferably, the displacement mechanism includes a first lead screw, one end of which is rotatably connected to one end of the slide rail, and the other end of which rotatably passes through the side plate and is fixedly connected to a first knob. The first lead screw is threadedly connected to the protrusion structure at the bottom of the I-shaped block. The end corner of the I-shaped block is slidably engaged with both sides of the slide rail. The inner end face of the I-shaped block is provided with a T-shaped groove and is slidably engaged with a T-shaped structure on the back of the slider. Two loop blocks are symmetrically fixed to the outer end face of the slider.
[0011] Preferably, the back center of the slider is fixedly connected to one end of the connecting block, the other end of the connecting block slides through the second sliding cavity opened inside the I-shaped block and is fixedly connected to the back of the toothed plate, the toothed plate slides up and down connected to the inside of the first sliding cavity opened inside the I-shaped block, the toothed structure of the toothed plate is connected to a gear, a turbine is coaxially fixedly connected to one side of the gear, the two ends of the central shaft of the gear and the turbine are rotatably connected to the side wall of the inner cavity opened inside the I-shaped block, the bottom of the turbine is rotatably connected to a worm gear structure at one end of the rotating rod, the free end of the worm gear structure is rotatably connected to the side wall of the inner cavity, and the other end of the rotating rod rotatably passes through the inner cavity and is fixedly connected to a second knob.
[0012] Preferably, the through hole of the spiral block is slidably connected to the end ears fixed on both sides of the dial indicator. A limiting slide post is fixed in the middle of the two end walls of the through hole of one spiral block. The limiting slide post slides through one of the end ears. A second lead screw is rotatably connected in the middle of the two end walls of the through hole of the other spiral block. The second lead screw is threaded through the other end ear. The outer end of the second lead screw rotatably passes through the outer wall of the spiral block and is fixedly connected to a third knob.
[0013] Preferably, the scale structure includes a support rod, one end of which is fixed to the side wall of the fixed block, and the other end of which is fixed to a sleeve block. An L-shaped ruler is slidably fitted inside the sleeve block. The corner end of the L-shaped ruler is fixed to one end of a spring, and the other end of the spring is fixed to the side wall of the support rod. The tail end of the L-shaped ruler is provided with a size scale value.
[0014] A method for using a static electricity discharge device for corrosion-resistant pipelines includes the following steps:
[0015] S1. Align the mounting hole at the bottom of the motor with the first strip mounting hole and pre-tighten the bolts for initial positioning. Align the mounting hole at the bottom of the reducer with the second strip mounting hole and pre-tighten the bolts for initial positioning. At this time, both the motor and the reducer can move slightly.
[0016] S2. Align and pre-tighten the output shaft of the reducer with the flange and the fixed block. During this process, you can add or remove conventional shims between the bottom of the reducer and the base to ensure that the output shaft of the reducer and the flange 60 are on the same horizontal axis at the installation position of the fixed block 90.
[0017] S3. Align and pre-tighten the input shaft of the reducer and the output shaft of the motor using a flange-type torque sensor. During this process, you can add or remove shims between the motor and the base to ensure that the output shaft of the motor and the input shaft of the reducer are on the same horizontal axis.
[0018] S4. Tighten and fix the bolts connecting the reducer and the bottom of the motor to the base, make the U-shaped groove of the reaction block abut against the input shaft of the reducer, and tighten and fix the bolts on the clamp plate.
[0019] S5. Turning the first knob drives the first lead screw to rotate, thereby controlling the movement of the I-shaped block back and forth. Turning the second knob controls the vertical movement of the slider. Turning the third knob controls the left and right movement of the dial indicator. Finally, the dial indicator probe is brought into contact with the outer casing of the reducer and the outer end face of the bearing seat that needs to be tested.
[0020] S6. During the process of finding the center end face of the outer circle of the bearing housing with the probe of the dial indicator, one end of the L-shaped ruler is brought into contact with the front end face of the reducer housing, so that the L-shaped ruler retracts along the sleeve block and pulls the spring. At this time, observe the alignment value between the innermost and outermost sides of the outer circle end face of the bearing housing and the scale on the L-shaped ruler, and take half of the value to find the center position. Then, turn the first knob, the second knob and the third knob to bring the probe into contact with the center scale of the L-shaped ruler.
[0021] S7. Start the motor and flange torque sensor, observe and record the readings generated by the dial indicator and the data from the flange torque sensor, and determine the rigidity of the reducer housing by the ratio of the torque value to the displacement value.
[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0023] The speed reducer rigidity testing device and its usage method of the present invention integrate and install a base, dial indicator, motor, flange torque sensor and the speed reducer under test, so as to perform rigidity testing on the speed reducer housing, which can intuitively reflect the mechanical performance of the speed reducer. The assembly accuracy can be judged by the deformation of each part of the structure, and at the same time, it can analyze whether the speed reducer housing can withstand the torque and force transmitted by the internal gears.
[0024] The speed reducer rigidity detection device and its usage method of the present invention, by setting a displacement mechanism, enable the dial indicator to detect the deformation of multiple positions such as the speed reducer housing and bearing housing, and to calculate the relative changes between them. It can construct a deformation cloud map of the housing under stress, thereby analyzing the force transmission path and deformation mode.
[0025] The speed reducer rigidity testing device and its usage method of the present invention can easily locate the center end face of the outer circle of the bearing housing by setting a scale structure, thereby improving the testing efficiency. Attached Figure Description
[0026] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:
[0027] Figure 1 This is a three-dimensional view of the structure of the present invention;
[0028] Figure 2 This is an enlarged three-dimensional view of the structure at point A of the present invention;
[0029] Figure 3 This is an enlarged three-dimensional view of the structure at point B of the present invention;
[0030] Figure 4 This is a three-dimensional view of the half-section structure of the I-shaped block of the present invention;
[0031] Figure 5 This is a perspective view of the internal component connection structure of the I-shaped block of the present invention;
[0032] Figure 6 This is a side sectional view of the side plate of the present invention;
[0033] Figure 7 This is a rear-view perspective view of a partial structure of the present invention;
[0034] Figure 8 This is a three-dimensional view of the reaction block structure of the present invention.
[0035] In the diagram: 10 Base, 11 First strip-shaped mounting hole, 12 Second strip-shaped mounting hole, 20 Side plate, 21 Slide rail, 30 Displacement mechanism, 31 First knob, 32 First lead screw, 33 I-shaped block, 331 Inner cavity, 332 Protrusion, 333 First sliding cavity, 334 Second sliding cavity, 335 T-slot, 34 Slider, 341 T-shaped structure, 35 Connecting block, 36 Gear plate, 37 Gear, 38 Turbine, 39 Rotary rod, 391 Worm gear structure, 310 Second knob, 311 Recurve Block, 312 limit slide, 313 second lead screw, 314 third knob, 40 dial indicator, 41 end lug, 50 motor, 60 flange, 70 flange torque sensor, 80 reducer, 81 input shaft, 82 housing, 83 bearing seat, 84 output shaft, 90 fixed block, 100 scale structure, 101 L-shaped scale, 102 sleeve block, 103 support rod, 104 spring, 110 reaction block, 111 U-shaped groove, 112 lock hole, 113 clamping plate, 120 bolt. Detailed Implementation
[0036] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.
[0037] Please see Figure 1-7 The present invention relates to a speed reducer rigidity detection device and its usage method, comprising a base 10, a motor 50 (a servo motor) on one side of the upper part of the base 10, which can be controlled to rotate in both directions, a side plate 20 symmetrically arranged on the other side of the base 10, a slide rail 21 horizontally opened on the side plate 20 and a displacement mechanism 30 installed inside, a dial indicator 40 installed on one side of the displacement mechanism 30, the output end of the motor 50 being connected to one end of a flange torque sensor 70 via a flange 60, the flange torque sensor 70 being connected to a data processor via a data cable to record relevant data, the other end of the flange torque sensor 70 being connected to the input shaft 81 of a speed reducer 80 via the flange 60, the output shaft 84 of the speed reducer 80 being connected to a fixed block 90 via the flange 60, the bottom end of the fixed block 90 being fixed to the top of the base 10, and scale structures 100 symmetrically arranged on both sides of the fixed block 90. It should be noted that the rigidity of the base 10 and the fixed block 90 is much greater than the deformation rigidity of the speed reducer 80.
[0038] Please see Figure 1 and 7The base 10 has two symmetrically arranged first strip-shaped mounting holes 11 and second strip-shaped mounting holes 12 on both sides. The top of the first strip-shaped mounting hole 11 is connected to the bottom corner of the motor 50 by bolts 114, and the second strip-shaped mounting hole 12 is connected to the bottom corner of the reducer 80 by bolts 120. By setting the first strip-shaped mounting holes 11 and the second strip-shaped mounting holes 12, it is easy to make small adjustments when installing the motor and the reducer, so as to meet the situation that even reducers 80 of the same model may have size differences during production and assembly.
[0039] Please see Figure 7-8 The outer wall of the input shaft 81 abuts against the U-shaped groove 111 of the reaction block 110. The bottom of the reaction block 110 slides through the base 10. The lower two sides of the reaction block 110 slide against the clamping plates 113. The two clamping plates 113 are connected by bolts 120. The bolts 120 slide through the vertically opened locking holes 112 in the reaction block 110. When the motor 50 applies torque to the reducer 80 for testing, non-torque loads such as radial force, axial force or bending moment will be generated. By adding the reaction block 110 and abutting against the input shaft 81, the non-torque load generated by the input shaft of the reducer is transmitted to the base 10 through the reaction block 110, thereby ensuring that the force applied by the motor 50 to the input shaft 81 of the reducer 80 is purely a rotational torque around the axis.
[0040] Please see Figure 1-6 The displacement mechanism 30 includes a first lead screw 32. One end of the first lead screw 32 is rotatably connected to one end of the slide rail 21, and the other end of the first lead screw 32 rotatably passes through the side plate 20 and is fixedly connected to a first knob 31. The first lead screw 32 is threadedly connected to the protrusion 332 structure at the bottom of the I-shaped block 33. The end corner of the I-shaped block 33 is slidably engaged with both sides of the slide rail 21. The inner end face of the I-shaped block 33 is provided with a T-shaped groove 335 and is slidably engaged with the T-shaped structure 341 on the back of the slider 34. The outer end face of the slider 34 is symmetrically fixed with two loop blocks 311. By setting the displacement mechanism 30, the dial indicator 40 can be moved in three dimensions to facilitate deformation measurement of multiple positions of the reducer 80, so as to systematically reflect the overall rigidity value of the reducer 80.
[0041] Please see Figure 4-5The back center of the slider 34 is fixedly connected to one end of the connecting block 35. The other end of the connecting block 35 slides through the second sliding cavity 334 opened inside the I-shaped block 33 and is fixedly connected to the back of the toothed plate 36. The toothed plate 36 slides up and down and is connected to the inside of the first sliding cavity 333 opened inside the I-shaped block 33. The toothed structure of the toothed plate 36 is connected to the gear 37. A turbine 38 is coaxially fixed to one side of the gear 37. The two ends of the central shaft of the gear 37 and the turbine 38 are rotatably connected to the side wall of the inner cavity 331 opened inside the I-shaped block 33. The bottom of the turbine 38 is rotatably connected to the worm gear at one end of the rotating rod 39. Structure 391, the free end of worm structure 391 is rotatably connected to the side wall of inner cavity 331, and the other end of rotating rod 39 rotates through inner cavity 331 and is fixedly connected to a second knob 310. By turning the second knob 310, rotating rod 39 can be driven to rotate, which in turn drives turbine 38 to rotate through tooth structure of tooth plate 36. Then gear 37 follows the rotation and drives tooth plate 36 to move up and down, which in turn drives slider 34 to move up and down. It should be noted that the lead angle of worm structure 391 here is less than the equivalent friction angle of meshing material of turbine 38 and worm structure 391, and has a certain degree of self-locking.
[0042] Please see Figure 4 The through hole of the ring block 311 is slidably connected to the end ears 41 fixed on both sides of the dial indicator 40. A limiting slide post 312 is fixed in the middle of the two end walls of the through hole of one ring block 311. The limiting slide post 312 slides through one end ear 41. A second lead screw 313 is rotatably connected in the middle of the two end walls of the through hole of the other ring block 311. The second lead screw 313 is threaded through the other end ear 41. The outer end of the second lead screw 313 rotatably passes through the outer wall of the ring block 311 and is fixedly connected to a third knob 314. By turning the third knob 314, the second lead screw 313 is driven to rotate, which in turn drives the end ear 41 on one side of the dial indicator 40 to move, thereby realizing the left and right movement of the dial indicator 40.
[0043] Please see Figure 1-3 The scale structure 100 includes a support rod 103. One end of the support rod 103 is fixed to the side wall of the fixed block 90, and the other end of the support rod 103 is fixed to a sleeve block 102. An L-shaped ruler 101 is slidably sleeved inside the sleeve block 102. The corner end of the L-shaped ruler 101 is fixed to one end of a spring 104, and the other end of the spring 104 is fixed to the side wall of the support rod 103. The tail end of the L-shaped ruler 101 is provided with a size scale value. In the transmission process of the reducer, the bearing is the core component connecting the high-speed shaft, the low-speed shaft and the housing. The force transmission is ultimately concentrated on the bearing seat 83 that carries the bearing. The rigidity of the bearing seat 83 directly determines the performance of the entire transmission system. The center position of the outer ring of the bearing seat 83 is the most objective indicator of the deformation of the bearing seat 83. Therefore, L-shaped rulers 101 are set on both sides of the bearing seat 83 to facilitate quick centering and positioning detection points. It should be noted that the upper plane of the L-shaped ruler 101 is located at the longitudinal center position of the bearing seat 83.
[0044] A method for using a static electricity discharge device for corrosion-resistant pipelines includes the following steps:
[0045] S1. Align the bottom mounting hole of motor 50 with the first strip mounting hole 11 and pre-tighten the bolt 120 for initial positioning. Align the bottom mounting hole of reducer 80 with the second strip mounting hole 12 and pre-tighten the bolt 120 for initial positioning. At this time, both motor 50 and reducer 80 can move slightly.
[0046] S2. Align and pre-tighten the output shaft 84 of the reducer 80 with the fixed block 90 through the flange 60. During this process, the output shaft 84 of the reducer 80 and the flange 60 can be aligned and pre-tightened at the installation position of the fixed block 90 by adding or removing conventional shims between the bottom of the reducer 80 and the base 10.
[0047] S3. Align and pre-tighten the input shaft 81 of the reducer 80 and the output shaft of the motor 50 through the flange torque sensor 70. During this process, the output shaft of the motor 50 and the input shaft 81 of the reducer 80 can be kept on the same horizontal axis by adding or removing shims between the connection between the motor 50 and the base 10.
[0048] S4. Tighten and fix the bolts 120 connecting the bottom of the reducer 80 and motor 50 to the base 10, abut the U-shaped groove 111 of the reaction block 110 with the input shaft 81 of the reducer 80, and tighten and fix the bolts 120 on the clamping plate 113.
[0049] S5. Turning the first knob 31 drives the first lead screw 32 to rotate, thereby controlling the I-shaped block 33 to move back and forth. Turning the second knob 310 controls the slider 34 to move vertically. Turning the third knob 314 controls the dial indicator 40 to move left and right. Finally, the dial indicator 40 probe is brought into contact with the outer shell 82 of the reducer 80 and the outer side of the bearing seat 83 where the end face to be tested is located.
[0050] S6. During the process of finding the center end face of the outer circle of the bearing housing 83 by the probe of the dial indicator 40, one end of the L-shaped ruler 101 abuts against the front end face of the housing 82 of the reducer 80, thereby causing the L-shaped ruler 101 to retract along the sleeve block 102 and pull the spring 104. At this time, observe the alignment value between the innermost and outermost sides of the outer circle end face of the bearing housing 83 and the scale on the L-shaped ruler 101, and take half of the value to find the center position. Then, by turning the first knob 31, the second knob 310 and the third knob 314, the probe of the dial indicator 40 abuts against the center scale of the L-shaped ruler 101.
[0051] S7, start the motor 50 and flange torque sensor 70, observe and record the readings generated by dial gauge 40 and the data of flange torque sensor 70, and determine the rigidity of reducer housing 82 and bearing seat 83 by the ratio of torque value to displacement value.
[0052] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.
[0053] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.
Claims
1. A speed reducer rigidity testing device and its usage method, characterized in that: The device includes a base (10), on one side of the upper part of the base (10) a motor (50) is provided, and on the other side of the base (10) a side plate (20) is symmetrically provided. The side plate (20) has a horizontally opened slide rail (21) and a displacement mechanism (30) is installed inside. A dial indicator (40) is installed on one side of the displacement mechanism (30). The output end of the motor (50) is connected to one end of a flange torque sensor (70) through a flange (60). The other end of the flange torque sensor (70) is connected to the input shaft (81) of a reducer (80) through a flange (60). The output shaft (84) of the reducer (80) is connected to a fixed block (90) through a flange (60). The bottom end of the fixed block (90) is fixed to the top of the base (10). Scale structures (100) are symmetrically provided on both sides of the fixed block (90).
2. The speed reducer rigidity testing device and its method of use as described in claim 1, characterized in that: The base (10) has two symmetrically arranged first strip-shaped mounting holes (11) and second strip-shaped mounting holes (12) on its two sides. The top of the first strip-shaped mounting hole (11) is connected to the bottom corner of the motor (50) by bolts (114), and the second strip-shaped mounting hole (12) is connected to the bottom corner of the reducer (80) by bolts (120).
3. The speed reducer rigidity testing device and its method of use as described in claim 1, characterized in that: The outer wall of the input shaft (81) abuts against the U-shaped groove (111) of the reaction block (110). The bottom of the reaction block (110) slides through the base (10). The two sides of the lower part of the reaction block (110) slide against the clamping plates (113). The two clamping plates (113) are connected by bolts (120). The bolts (120) slide through the vertically opened locking holes (112) of the reaction block (110).
4. The speed reducer rigidity testing device and its method of use as described in claim 1, characterized in that: The displacement mechanism (30) includes a first lead screw (32), one end of which is rotatably connected to one end of the slide rail (21), and the other end of which rotatably passes through the side plate (20) and is fixedly connected to a first knob (31). The first lead screw (32) is threadedly connected to the protrusion (332) structure at the bottom of the I-shaped block (33). The end corner of the I-shaped block (33) is slidably engaged with both sides of the slide rail (21). The inner end face of the I-shaped block (33) is provided with a T-shaped groove (335) and is slidably engaged with a T-shaped structure (341) on the back of the slider (34). The outer end face of the slider (34) is symmetrically fixed with two loop blocks (311).
5. The speed reducer rigidity testing device and its method of use as described in claim 4, characterized in that: The slider (34) is fixedly connected to one end of the connecting block (35) at the center of its back side. The other end of the connecting block (35) slides through the second sliding cavity (334) opened inside the I-shaped block (33) and is fixedly connected to the back side of the toothed plate (36). The toothed plate (36) slides up and down and is connected to the first sliding cavity (333) opened inside the I-shaped block (33). The toothed structure of the toothed plate (36) is connected to a gear (37). A turbine (3) is coaxially fixed to one side of the gear (37). 8) The gear (37) and the turbine (38) are rotatably connected at both ends to the side wall of the inner cavity (331) opened inside the I-shaped block (33). The bottom of the turbine (38) is rotatably connected to the worm structure (391) at one end of the rotating rod (39). The free end of the worm structure (391) is rotatably connected to the side wall of the inner cavity (331). The other end of the rotating rod (39) rotatably passes through the inner cavity (331) and is fixedly connected to a second knob (310).
6. The speed reducer rigidity testing device and its method of use as described in claim 4, characterized in that: The through hole of the herringbone block (311) is slidably connected to the end ears (41) fixed on both sides of the dial indicator (40). A limiting slide post (312) is fixedly connected to the middle of the two end walls of the through hole of one herringbone block (311). The limiting slide post (312) slides through one end ear (41). A second lead screw (313) is rotatably connected to the middle of the two end walls of the through hole of the other herringbone block (311). The second lead screw (313) is threaded through the other end ear (41). The outer end of the second lead screw (313) rotatably passes through the outer wall of the herringbone block (311) and is fixedly connected to a third knob (314).
7. The speed reducer rigidity testing device and its method of use as described in claim 1, characterized in that: The scale structure (100) includes a support rod (103), one end of which is fixed to the side wall of the fixed block (90), and the other end of which is fixed to a sleeve block (102). An L-shaped ruler (101) is slidably sleeved inside the sleeve block (102). The corner end of the L-shaped ruler (101) is fixed to one end of a spring (104), and the other end of the spring (104) is fixed to the side wall of the support rod (103). The tail end of the L-shaped ruler (101) is provided with a size scale value.
8. The speed reducer rigidity testing device and its method of use according to any one of claims 1-7, characterized in that, Includes the following steps: S1. Align the bottom mounting hole of the motor (50) with the first strip mounting hole (11) and pre-tighten the positioning with bolts (120). Align the bottom mounting hole of the reducer (80) with the second strip mounting hole (12) and pre-tighten the positioning with bolts (120). At this time, both the motor (50) and the reducer (80) can move slightly. S2. Align and pre-tighten the output shaft (84) of the reducer (80) with the fixed block (90) through the flange (60). During this process, the output shaft (84) of the reducer (80) and the flange (60) can be aligned and pre-tightened at the installation position of the fixed block (90) by adding or removing conventional shims between the bottom of the reducer (80) and the base (10). S3. Align and pre-tighten the input shaft (81) of the reducer (80) and the output shaft of the motor (50) through the flange torque sensor (70). During this process, the output shaft of the motor (50) and the input shaft (81) of the reducer (80) can be kept on the same horizontal axis by adding or removing shims between the motor (50) and the base (10). S4. Tighten and fix the bolts (120) connecting the bottom of the reducer (80) and motor (50) to the base (10), abut the U-shaped groove (111) of the reaction block (110) with the input shaft (81) of the reducer (80), and tighten and fix the bolts (120) on the clamp (113); S5. Turning the first knob (31) drives the first lead screw (32) to rotate, thereby controlling the I-shaped block (33) to move back and forth. Turning the second knob (310) controls the slider (34) to move vertically. Turning the third knob (314) controls the dial indicator (40) to move left and right. Finally, the dial indicator (40) probe is brought into contact with the outer shell (82) of the reducer (80) and the outer side of the bearing seat (83) of the end face to be tested. S6. During the process of finding the center end face of the outer circle of the bearing housing (83) by the probe of the dial indicator (40), one end of the L-shaped ruler (101) is brought into contact with the front end face of the housing (82) of the reducer (80), so that the L-shaped ruler (101) retracts along the sleeve (102) and pulls the spring (104). At this time, observe the alignment value of the innermost and outermost sides of the outer circle end face of the bearing housing (83) with the scale on the L-shaped ruler (101) and take half of the value to find the center position. Then, by turning the first knob (31), the second knob (310) and the third knob (314), the probe of the dial indicator (40) is brought into contact with the center scale of the L-shaped ruler (101). S7. Start the motor (50) and flange torque sensor (70), observe and record the readings generated by the dial gauge (40) and the data of the flange torque sensor (70), and determine the rigidity of the reducer (80) housing (82) and bearing housing (83) by the ratio of torque value to displacement value.