Reverse clearance testing tool and method for lead screw transmission

Abstract

The invention relates to the technical field of lead screw testing, in particular to a lead screw transmission reverse clearance testing tool and method.The lead screw transmission reverse clearance testing tool comprises a testing table, a control mechanism is arranged on the rear side of the testing table, the testing table comprises a control bottom table, and a testing plate is fixedly connected to the middle of the top of the control bottom table; the left side and the right side of the middle of the top of each test plate are fixedly connected with lead screw connecting blocks, the left side and the right side of the inner side of each test plate are fixedly connected with sliding rails, and the front side and the rear side of the middle of the top of each test plate are fixedly connected with laser displacement sensors. High-precision automatic testing of the lead screw transmission reverse clearance is achieved, real-time and accurate monitoring of the displacement change of the sliding block is achieved through close fit of the laser displacement sensor and the control assembly, the accuracy and reliability of test data are ensured, and through cooperative work of the electric push rod and the motor, the accuracy and reliability of the test data are improved. And the clamping and testing processes are more stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lead screw testing, more specifically, the present application relates to a reverse gap testing tool and method for lead screw transmission. BACKGROUND

[0002] Lead screw refers to a mechanical transmission element that converts rotary motion into linear motion, widely used in various precision machinery and automation equipment. In the transmission process, the lead screw realizes high-precision displacement control through cooperation with the nut, but the reverse gap (i.e. back error) will directly affect the positioning accuracy and repeatability of the equipment. Therefore, accurate testing of the reverse gap of the lead screw is crucial to ensure the stability of the mechanical system. The testing tool and method proposed by the present application is an innovative solution designed to meet this technical demand.

[0003] According to the patent document CN119555369A, a high-speed roller screw testing device is disclosed, which includes a bed body, the bed body is provided with a power assembly for providing power to the roller screw, the end of the roller screw is connected with a screw nut, the end of the screw nut is connected with a loading mechanism for providing load to the roller screw, and a connecting mechanism is provided between the roller screw and the loading mechanism; the power assembly includes a power motor and a diaphragm coupling provided on the roller screw; compared with the prior art, the brake and the loading roller screw in the loading mechanism provide load for the roller screw, and the air pressure of the brake is adjusted by the pneumatic control system to realize accurate control of the loading torque, so that the roller screw realizes passive loading, the response speed is fast, the forward and reverse loading force of the roller screw can be quickly loaded, the diaphragm coupling can provide gapless transmission, there is no gap and impact during reverse loading, thereby realizing continuous forward and reverse testing, improving the efficiency of testing and reducing the labor cost.

[0004] As independent parts, the lead screw and the sliding block must be precisely tested for reverse gap after being assembled together. This testing link is crucial because it directly affects the running accuracy and stability of the entire mechanical system. However, traditional testing methods may encounter many difficulties in actual operation. First, the operation process is relatively complex, and technical personnel must have high professional knowledge and rich practical experience to ensure that each step of operation is accurate. Second, the accuracy of traditional testing methods often fails to meet the ideal state, and the test results may have large errors, which cannot meet the needs of high-precision application scenarios. In addition, traditional methods may face a significant problem, i.e. it is difficult to realize continuous forward and reverse testing. This continuous testing is crucial for evaluating the performance of the lead screw and the sliding block in long-term operation. However, the limitations of traditional methods make the comprehensiveness and reliability of test results greatly compromised. SUMMARY

[0005] In order to overcome the above-mentioned defects of the prior art, the present application provides a lead screw transmission reverse gap testing tool and method, and the technical problems to be solved by the present application are: the operation process is relatively complex, and the technical personnel need to have higher professional knowledge and rich practical experience to ensure that each step of operation is accurate, secondly, the accuracy of the traditional testing method is often difficult to achieve the ideal state, and the test result may have a large error, which cannot meet the demand of high-precision application scene, in addition, the traditional method may face a significant problem, that is, it is difficult to realize continuous forward and reverse test, and such continuous test is very important for evaluating the performance of the lead screw and the sliding block in long-term operation, but the limitation of the traditional method in this aspect makes the comprehensiveness and reliability of the test result greatly discounted.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is: A lead screw transmission reverse gap testing tool, comprising a test table, and a control mechanism is arranged on the rear side of the test table; The test table comprises a control base, a test plate is fixedly connected to the top middle part of the control base, lead screw connecting blocks are fixedly connected to the left and right sides of the top middle part of the test plate, sliding rails are fixedly connected to the left and right sides of the top of the test plate inside two test plates, and laser displacement sensors are fixedly connected to the front and rear sides of the top middle part of the test plate; The control mechanism comprises a connecting seat, and a control assembly is arranged on the top of the connecting seat.

[0007] As a further scheme of the present application, a lead screw is rotatably connected to the inner wall of the right lead screw connecting block, the left end of the lead screw is rotatably connected to the inner side of the left lead screw connecting block, control base sliding grooves are formed in the front and rear sides of the control base, a positioning piece is arranged on the top of the test plate, and a sliding block is threadedly connected to the outer wall of the lead screw.

[0008] As a further scheme of the present application, the positioning piece comprises two L-shaped sliding plates, lead screw sleeves are fixedly connected to the inner walls of the two L-shaped sliding plates, the bottoms of the two L-shaped sliding plates are slidably connected to the tops of the two sliding rails, the inner walls of the two lead screw sleeves are sleeved on the left and right sides of the outer wall of the lead screw, the sides of the outer walls of the two lead screw sleeves close to each other are fixedly connected to inner sliding plates, the bottoms of the two inner sliding plates are slidably connected to the outer walls of the two sliding rails, the tops of the two inner sliding plates are fixedly connected to vertical plates, guide grooves are formed in the front and rear sides of the two vertical plates, springs are fixedly connected to the top inner walls of the two vertical plates formed by the two vertical plates, the tops of the two vertical plates are fixedly connected to connecting rods, and clamping assemblies are arranged on the inner sides of the two vertical plates.

[0009] As a further scheme of the present application: the clamping assembly comprises two vertical blocks, the inner top of the two vertical blocks is fixedly connected with an electric push rod connecting block, the bottom middle of the electric push rod connecting block is fixedly connected with an electric push rod, the outer side of the two vertical blocks is fixedly connected with a horizontal connecting side plate, the inner left and right sides of the two horizontal connecting side plates are fixedly connected with clamping assembly sliders, the outer walls of the front and rear two groups of clamping assembly sliders are slidably connected to the inner walls of the guide grooves of the two vertical plates, and the top of the two groups of clamping assembly sliders is fixedly connected to the bottom end of the two groups of springs.

[0010] As a further scheme of the present application: the bottom middle of the two horizontal connecting side plates is fixedly connected with an L-shaped connecting block, the inner bottom of the two L-shaped connecting blocks is fixedly connected with a connecting block, the left and right sides of the bottom of the connecting block are rotatably connected with triangular rotating blocks, the inner wall top of the front and rear two groups of triangular rotating blocks is rotatably connected with rotating rods, the outer wall top of the front and rear two groups of rotating rods is rotatably connected with push-pull blocks, the outer wall of the push-pull block is slidably connected to the inner side of the two horizontal connecting side plates, the top of the push-pull block is fixedly connected to the bottom end of the electric push rod, the inner wall bottom of the front and rear two groups of triangular rotating blocks is rotatably connected with rotating clamp connecting blocks, and the bottom of the front and rear two groups of rotating clamp connecting blocks is fixedly connected with clamping plates.

[0011] As a further scheme of the present application: the connecting seat comprises two connecting seat side plates, the front and rear sides of the top and bottom of the two connecting seat side plates are fixedly connected with L-shaped blocks, the inner sides of the left and right groups of L-shaped blocks are fixedly connected to the four sides of the outer wall of the control base, the bottom of the two groups of L-shaped blocks at the bottom is fixedly connected with L-shaped support vertical rods, the rear side of the two connecting seat side plates is fixedly connected with guide block connecting plates, the top and bottom of the front side of the two guide block connecting plates are fixedly connected with guide blocks, the rear side bottom of the two guide block connecting plates is fixedly connected with motor plate connecting rods, the top middle of the two motor plate connecting rods is fixedly connected with slide rod guide blocks, and the rear side of the two motor plate connecting rods is fixedly connected with motor connecting plates.

[0012] As a further scheme of the present application: the top middle of the motor connecting plate is fixedly connected with a motor, the output end of the motor is fixedly connected with a rotating block, and the front side top of the rotating block is fixedly connected with a resisting block.

[0013] As a further scheme of the present application: the control assembly comprises an elliptical sliding groove plate, the inner wall of the elliptical sliding groove plate is sleeved on the outer wall of the resisting block, the left and right sides of the elliptical sliding groove plate are fixedly connected with columnar cross rods, and the outer walls of the two columnar cross rods are slidably connected to the inner walls of the two slide rod guide blocks.

[0014] As a further scheme of the present application: the outer end of the two columnar cross bars is fixedly connected with a moving side plate, the front side of the inner side of the two moving side plates is fixedly connected with a columnar rod, the outer wall of the two columnar rods is slidingly connected with the inner wall of the middle part of the two connecting seat side plates, the middle part of the top and bottom of the two moving side plates is fixedly connected with an L-shaped columnar push rod connecting block, the inner side of the inner end of the two L-shaped columnar push rod connecting blocks is fixedly connected with a columnar push rod, the inner end of the left and right two groups of columnar push rods is extended to the inner side of the left and right two groups of guide blocks, the outer wall of the left and right two groups of columnar push rods is slidingly connected with the inner side of the left and right two groups of guide blocks, the inner end of the left and right two groups of columnar push rods is fixedly connected with a moving vertical plate, the top of the two moving vertical plates is fixedly connected with the bottom rear side of the two connecting rods, and the front side bottom of the two moving vertical plates is slidingly connected with the two sides of the inner wall of the control bottom groove opened on the rear side of the control bottom table.

[0015] In addition, the present application also relates to a method for testing the reverse gap of a lead screw transmission tool, comprising the following steps: Step one: install the lead screw transmission component to be tested in the specified position of the test table, and correctly connect the lead screw between the two lead screw connecting blocks; Step two: rotate the lead screw to move the sliding block to the inner side of the two lead screw sleeves and align the laser displacement sensor; Step three: start the electric push rod to clamp the sliding block with the clamping plate, and then start the motor to drive the positioning member and the sliding block to perform reverse gap testing, and continuously observe the equipment operation state and data transmission during the testing process; Step four: after the testing is completed, control the motor to stop running, so that each component returns to the initial position, obtain the data such as the reverse gap value of the lead screw transmission from the control assembly, record and analyze the data, judge whether the reverse gap of the lead screw transmission is within a reasonable range, and if it is out of the range, further investigate the reason and take corresponding treatment.

[0016] The present application has the following advantages: The present application realizes high-precision automatic testing of the reverse gap of the lead screw transmission by setting the test table and the control mechanism, and through the close cooperation of the laser displacement sensor and the control assembly, not only realizes real-time and accurate monitoring of the displacement change of the sliding block, but also ensures the accuracy and reliability of the test data. At the same time, the cooperation of the electric push rod and the motor makes the clamping and testing process more stable and efficient, greatly improving the testing efficiency. In addition, the testing tool and method have wide applicability and can be applied to lead screw transmission components of different specifications and types, providing strong technical support for performance evaluation and quality detection of lead screw transmission. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main body of the present application. Figure 2 It is the schematic diagram of the three-dimensional separate structure of the main body of the application; Figure 3 It is the schematic diagram of the three-dimensional structure of the test bench of the application; Figure 4 It is the schematic diagram of the three-dimensional separate structure of the test bench of the application; Figure 5 It is the schematic diagram of the three-dimensional structure of the positioning member of the application; Figure 6 It is the schematic diagram of the three-dimensional structure of the clamping assembly of the application; Figure 7 It is the schematic diagram of the three-dimensional structure of the control mechanism of the application; Figure 8 It is the schematic diagram of the three-dimensional separate structure of the control mechanism of the application; Figure 9 It is the schematic diagram of the three-dimensional structure of the connecting seat of the application; Figure 10 It is the schematic diagram of the three-dimensional structure of the control assembly of the application.

[0018] In the figure: 1, test bench; 11, control base; 12, test plate; 13, screw connecting block; 14, slide rail; 15, screw; 16, laser displacement sensor; 17, sliding block; 18, positioning member; 181, L-shaped sliding plate; 182, screw sleeve; 183, inner sliding plate; 184, vertical plate; 185, guide groove; 186, spring; 187, connecting rod; 188, clamping assembly; 1881, vertical block; 1882, electric push rod connecting block; 1883, electric push rod; 1884, horizontal connecting side plate; 1885, clamping assembly sliding block; 1886, L-shaped connecting block; 1887, connecting block; 1888, push-pull block; 1889, rotating rod; 18810, triangular rotating block; 18811, rotating clamp connecting block; 18812, clamp; 19, control base sliding groove; 2, control mechanism; 21, connecting seat; 211, connecting seat side plate; 212, L-shaped block; 213, L-shaped support vertical rod; 214, guide block connecting plate; 215, guide block; 216, motor plate connecting rod; 217, slide rod guide block; 218, motor connecting plate; 219, motor; 2110, rotating block; 2111, stop block; 22, control assembly; 221, oval sliding groove plate; 222, columnar horizontal rod; 223, moving side plate; 224, L-shaped columnar push rod connecting block; 225, columnar rod; 226, columnar push rod; 227, moving vertical plate. DETAILED DESCRIPTION

[0019] With reference to the accompanying drawings: clear and complete description of the technical solutions in the embodiments of the present application will be given. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0020] As shown in Figures 1-2 The present application provides a screw drive reverse gap testing tool, which comprises a testing table 1, and a control mechanism 2 is arranged at the rear side of the testing table 1.

[0021] As shown in Figures 3-10As shown, the test platform 1 comprises a control base 11, the top middle of the control base 11 is fixedly connected with a test plate 12, the left and right sides of the top middle of the test plate 12 are fixedly connected with a lead screw connecting block 13, the left and right sides of the top of the two test plates 12 are fixedly connected with a sliding rail 14, the front and rear sides of the top middle of the test plate 12 are fixedly connected with a laser displacement sensor 16, the inner wall of the right lead screw connecting block 13 is rotatably connected with a lead screw 15, the left end of the lead screw 15 is rotatably connected to the inner side of the left lead screw connecting block 13, the front and rear sides of the control base 11 are provided with a control base sliding groove 19, the top of the test plate 12 is provided with a positioning piece 18, the outer wall of the lead screw 15 is threadedly connected with a sliding block 17, the positioning piece 18 comprises two L-shaped sliding plates 181, the inner walls of the two L-shaped sliding plates 181 are fixedly connected with a lead screw sleeve 182, the bottoms of the two L-shaped sliding plates 181 are slidably connected to the tops of the two sliding rails 14, the inner walls of the two lead screw sleeves 182 are sleeved on the left and right sides of the outer wall of the lead screw 15, the sides of the outer walls of the two lead screw sleeves 182 close to each other are fixedly connected with an inner sliding plate 183, the bottoms of the two inner sliding plates 183 are slidably connected to the outer walls of the two sliding rails 14, the tops of the two inner sliding plates 183 are fixedly connected with a vertical plate 184, the front and rear sides of the two vertical plates 184 are provided with a guide groove 185, the top inner walls of the two vertical plates 184 provided with the two vertical plates 184 are fixedly connected with a spring 186, the tops of the two vertical plates 184 are fixedly connected with a connecting rod 187, the inner sides of the two vertical plates 184 are provided with a clamping assembly 188, the clamping assembly 188 comprises two vertical blocks 1881, the inner top of the two vertical blocks 1881 is fixedly connected with an electric push rod connecting block 1882, the bottom middle of the electric push rod connecting block 1882 is fixedly connected with an electric push rod 1883, the outer sides of the two vertical blocks 1881 are fixedly connected with a horizontal connecting side plate 1884, the left and right sides of the inner sides of the two horizontal connecting side plates 1884 are fixedly connected with a clamping assembly sliding block 1885, the outer walls of the front and rear clamping assembly sliding blocks 1885 are slidably connected in the inner walls of the guide grooves 185 provided in the two vertical plates 184, the tops of the two clamping assembly sliding blocks 1885 are fixedly connected to the bottom ends of the two springs 186, the bottom middle of the two horizontal connecting side plates 1884 is fixedly connected with an L-shaped connecting block 1886, the inner bottom of the two L-shaped connecting blocks 1886 is fixedly connected with a connecting block 1887, the left and right sides of the front and rear sides of the connecting block 1887 are rotatably connected with a triangular rotating block 18810, the inner wall top of the front and rear triangular rotating blocks 18810 is rotatably connected with a rotating rod 1889, the outer wall top of the front and rear rotating rods 1889 is rotatably connected with a push-pull block 1888, the outer wall of the push-pull block 1888 is slidably connected to the inner side of the two horizontal connecting side plates 1884, the top of the push-pull block 1888 is fixedly connected to the bottom end of the electric push rod 1883, the inner wall bottom of the front and rear triangular rotating blocks 18810 is rotatably connected with a rotating clamp block 18811,The bottom of the front and rear connecting blocks 18811 is fixedly connected with a clamping plate 18812. The control mechanism 2 comprises a connecting seat 21, the top of the connecting seat 21 is provided with a control assembly 22, the connecting seat 21 comprises two connecting seat side plates 211, the top and bottom of the two connecting seat side plates 211 are fixedly connected with L-shaped blocks 212 on the front and rear sides, the inner sides of the left and right groups of L-shaped blocks 212 are fixedly connected to the four sides of the outer wall of the control base 11, the bottom of the two groups of L-shaped blocks 212 is fixedly connected with L-shaped support vertical rods 213, the rear sides of the two connecting seat side plates 211 are fixedly connected with guide block connecting plates 214, the top and bottom of the front sides of the two guide block connecting plates 214 are fixedly connected with guide blocks 215, the rear bottom of the two guide block connecting plates 214 are fixedly connected with motor plate connecting rods 216, the top of the middle of the two motor plate connecting rods 216 are fixedly connected with slide rod guide blocks 217, the rear sides of the two motor plate connecting rods 216 are fixedly connected with motor connecting plates 218, the top of the middle of the motor connecting plates 218 is fixedly connected with a motor 219, the output end of the motor 219 is fixedly connected with a rotating block 2110, the front top of the rotating block 2110 is fixedly connected with a resisting block 2111, the control assembly 22 comprises an elliptical sliding groove plate 221, the inner wall of the elliptical sliding groove plate 221 is sleeved on the outer wall of the resisting block 2111, the left and right sides of the elliptical sliding groove plate 221 are fixedly connected with columnar cross bars 222, the outer walls of the two columnar cross bars 222 are slidingly connected in the inner walls of the two slide rod guide blocks 217, the outer ends of the two columnar cross bars 222 are fixedly connected with moving side plates 223, the front sides of the inner sides of the two moving side plates 223 are fixedly connected with columnar rods 225, the outer walls of the two columnar rods 225 are slidingly connected in the inner walls of the middle of the two connecting seat side plates 211, the middle of the top and bottom of the two moving side plates 223 are fixedly connected with L-shaped columnar push rod connecting blocks 224, the inner sides of the two L-shaped columnar push rod connecting blocks 224 away from the moving side plates 223 are fixedly connected with columnar push rods 226, the inner ends of the left and right groups of columnar push rods 226 extend in the inner sides of the left and right groups of guide blocks 215, the outer walls of the left and right groups of columnar push rods 226 are slidingly connected in the inner sides of the left and right groups of guide blocks 215, the inner ends of the left and right groups of columnar push rods 226 are fixedly connected with moving vertical plates 227, the top of the two moving vertical plates 227 are fixedly connected to the bottom rear sides of the two connecting rods 187, the front bottom of the two moving vertical plates 227 are slidingly connected in the two sides of the inner wall of the control base sliding groove 19 on the rear side of the control base 11, In the gap test for the slider 17, first rotate the screw rod 15, move the slider 17 to the inner side of the two screw rod sleeve 182, at this time, the two sides of the slider 17 are aligned with the inner side of the two laser displacement sensors 16, then start the electric push rod 1883, after the electric push rod 1883 is started, the push-pull block 1888 is pushed to move towards the bottom, when the push-pull block 1888 moves towards the bottom, the four rotating rods 1889 rotate, and the two groups of triangular rotating blocks 18810 are pushed to rotate, the two groups of triangular rotating blocks 18810 rotate around the outer wall of the connecting block 1887, thereby driving the two clamping plates 18812 to rotate inward, and the slider 17 is clamped on the inner side of the two clamping plates 18812, when the slider 17 is stably clamped by the two clamping plates 18812, the laser displacement sensor 16 starts to operate, and the displacement change of the slider 17 is monitored in real time. At the same time, the motor 219 is started, the elliptical sliding groove plate 221 is driven to reciprocate through the rotating block 2110 and the resisting block 2111, the reciprocating motion of the elliptical sliding groove plate 221 is further converted into the linear motion of the columnar push rod 226 through the columnar cross rod 222 and the moving side plate 223, the linear motion of the columnar push rod 226 drives the moving vertical plate 227 to slide back and forth in the control base sliding groove 19, thereby driving the entire positioning piece 18 and the clamped slider 17 to perform reverse gap testing. During the testing process, the laser displacement sensor 16 transmits the displacement data of the slider 17 to the control assembly 22 in real time, the control assembly 22 processes and analyzes the data, and finally obtains the reverse gap value of the screw rod transmission, when there is a gap in the up-down direction of the slider 17, the slider 17 is in the state of being clamped by the positioning piece 18, and the positioning piece 18 moves up and down on the outer wall of the two vertical plates 184, at this time, the laser displacement sensor 16 can sensitively capture the displacement change of the slider 17 in the up-down direction, and rapidly and accurately transmit the displacement data to the control assembly 22, after the control assembly 22 receives the data, the data is deeply processed and analyzed according to the preset algorithm and program, so that the entire testing process has a high degree of automation, the testing result is accurate and reliable, and strong support is provided for performance evaluation of the screw rod transmission.

[0022] In addition, the present application also relates to a method for testing the reverse gap of a screw rod transmission, comprising the following steps: Step one: install the screw rod transmission component to be tested at the specified position of the test table 1, and correctly connect the screw rod 15 between the two screw rod connecting blocks 13; Step two: rotate the screw rod 15 to move the slider 17 to the inner side of the two screw rod sleeves 182 and align the laser displacement sensor 16; Step 3: Start the electric push rod 1883 to make the clamping plate 18812 hold the slider 17, and then start the motor 219 to drive the positioning part 18 and slider 17 to perform a back clearance test. During the test, continuously observe the equipment operation status and data transmission. Step 4: After the test is completed, control motor 219 to stop running, so that all components return to their initial positions. Obtain data such as the backlash value of the lead screw drive obtained from the test from control component 22, record and analyze the data, and determine whether the backlash of the lead screw drive is within a reasonable range. If it exceeds the range, further investigate the cause and take appropriate measures.

[0023] Working principle of the invention: When performing a gap test on the slider 17, firstly, rotate the lead screw 15 to rotate the slider 17 to the inside of the two lead screw sleeves 182. At this time, the two sides of the slider 17 are aligned with the inside of the two laser displacement sensors 16. Then, start the electric push rod 1883. The electric push rod 1883 starts to push the push-pull block 1888 to the bottom. When the push-pull block 1888 moves to the bottom, the four rotating rods 1889 rotate and push the two sets of triangular rotating blocks 18810 to rotate. The two sets of triangular rotating blocks 18810 rotate around the four sides of the outer wall of the connecting block 1887 as the axis, thereby causing the two clamping plates 18812 to rotate inward, clamping the slider 17 inside the two clamping plates 18812. After the slider 17 is firmly clamped by the two clamping plates 18812, the laser displacement sensor 16 starts to work, monitoring the displacement change of the slider 17 in real time. At the same time, the motor 219 starts, and through the rotating block 2110... The abutment block 2111 drives the elliptical slide plate 221 to reciprocate. The reciprocating motion of the elliptical slide plate 221 is further converted into the linear motion of the columnar push rod 226 through the columnar crossbar 222 and the moving side plate 223. The linear motion of the columnar push rod 226 pushes the moving vertical plate 227 to slide back and forth in the control base slide groove 19, thereby driving the entire positioning component 18 and the clamped slider 17 to perform a back clearance test. During the test, the laser displacement sensor 16 transmits the displacement data of the slider 17 to the control component 22 in real time. The control component 22 processes and analyzes the data and finally obtains the back clearance value of the screw drive. When there is a gap in the vertical direction of the slider 17, the slider 17 is clamped by the positioning component 18. At this time, the positioning component 18 moves up and down on the outer wall of the two vertical plates 184. At this time, the laser displacement sensor 16 can keenly capture the displacement change of the slider 17 in the vertical direction.

[0024] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A reverse backlash testing tool of screw drive, comprising a testing table (1), characterized in that: The rear side of the test platform (1) is provided with a control mechanism (2); The test platform (1) comprises a control base (11), the middle part of the top of the control base (11) is fixedly connected with a test plate (12), the left and right sides of the middle part of the top of the test plate (12) are fixedly connected with a screw rod connecting block (13), the top of the test plate (12) is fixedly connected with a slide rail (14) on the left and right sides of the inner side of the two test plates (12), and the front and rear sides of the middle part of the top of the test plate (12) are fixedly connected with a laser displacement sensor (16). The control mechanism (2) comprises a connecting seat (21), and the top of the connecting seat (21) is provided with a control assembly (22).

2. A reverse backlash testing tool of claim 1, wherein: The inner wall of the right screw rod connecting block (13) is rotatably connected with a screw rod (15), the left end of the screw rod (15) is rotatably connected to the inner side of the left screw rod connecting block (13), the front and rear sides of the control base (11) are provided with a control base sliding groove (19), the top of the test plate (12) is provided with a positioning piece (18), and the outer wall of the screw rod (15) is threadedly connected with a sliding block (17).

3. A reverse backlash testing tool of a lead screw drive according to claim 2, characterized in that: The positioning piece (18) comprises two L-shaped sliding plates (181), the inner walls of the two L-shaped sliding plates (181) are fixedly connected with a screw rod sleeve (182), the bottoms of the two L-shaped sliding plates (181) are slidably connected to the tops of the two slide rails (14), the inner walls of the two screw rod sleeves (182) are sleeved on the left and right sides of the outer wall of the screw rod (15), the sides of the outer walls of the two screw rod sleeves (182) away from each other are fixedly connected with an inner sliding plate (183), the bottoms of the two inner sliding plates (183) are slidably connected to the outer walls of the two slide rails (14), the tops of the two inner sliding plates (183) are fixedly connected with a vertical plate (184), the front and rear sides of the vertical plate (184) are provided with a guide groove (185), the inner walls of the two vertical plates (184) are fixedly connected with a spring (186), the tops of the two vertical plates (184) are fixedly connected with a connecting rod (187), and the inner sides of the two vertical plates (184) are provided with a clamping assembly (188).

4. A reverse backlash testing tool of claim 3, wherein: The clamping assembly (188) comprises two vertical blocks (1881), the inner top of the two vertical blocks (1881) is fixedly connected with an electric push rod connecting block (1882), the bottom of the electric push rod connecting block (1882) is fixedly connected with an electric push rod (1883), the outer sides of the two vertical blocks (1881) are fixedly connected with a horizontal connecting side plate (1884), the left and right sides of the inner sides of the two horizontal connecting side plates (1884) are fixedly connected with a clamping assembly sliding block (1885), the outer walls of the front and rear clamping assembly sliding blocks (1885) are slidably connected in the inner walls of the guide grooves (185) of the two vertical plates (184), and the tops of the two clamping assembly sliding blocks (1885) are fixedly connected to the bottom ends of the two springs (186).

5. A reverse backlash testing tool of a lead screw drive according to claim 4, characterized in that: The bottom middle of two horizontal connecting side plates (1884) is fixedly connected with an L-shaped connecting block (1886), the inner bottom of two L-shaped connecting blocks (1886) is fixedly connected with a connecting block (1887), the left and right sides of the bottom of the connecting block (1887) are rotatably connected with a triangular rotating block (18810), the inner wall top of the front and rear groups of triangular rotating blocks (18810) is rotatably connected with a rotating rod (1889), the outer wall top of the front and rear groups of rotating rods (1889) is rotatably connected with a push-pull block (1888), the outer wall of the push-pull block (1888) is slidably connected to the inner side of two horizontal connecting side plates (1884), the top of the push-pull block (1888) is fixedly connected to the bottom end of the electric push rod (1883), the inner wall bottom of the front and rear groups of triangular rotating blocks (18810) is rotatably connected with a rotating clamp plate connecting block (18811), and the bottom of the front and rear groups of rotating clamp plate connecting blocks (18811) is fixedly connected with a clamp plate (18812).

6. A reverse lash testing tool for a leadscrew drive as set forth in claim 1, wherein: The connecting seat (21) comprises two connecting seat side plates (211), and the front and rear sides of the top and bottom of the two connecting seat side plates (211) are fixedly connected with L-shaped blocks (212). The inner sides of the left and right groups of L-shaped blocks (212) are fixedly connected to the four sides of the outer wall of the control base (11). The bottoms of the two groups of L-shaped blocks (212) are fixedly connected with L-shaped support vertical rods (213). The rear sides of the two connecting seat side plates (211) are fixedly connected with guide block connecting plates (214). The top and bottom of the front side of the two guide block connecting plates (214) are fixedly connected with guide blocks (215). The rear bottom of the two guide block connecting plates (214) is fixedly connected with motor plate connecting rods (216). The top middle of the two motor plate connecting rods (216) is fixedly connected with slide rod guide blocks (217). The rear sides of the two motor plate connecting rods (216) are fixedly connected with motor connecting plates (218).

7. A reverse backlash testing tool of a lead screw drive according to claim 6, characterized in that: The top middle of the motor connecting plate (218) is fixedly connected with a motor (219), and the output end of the motor (219) is fixedly connected with a rotating block (2110). The front side top of the rotating block (2110) is fixedly connected with a resisting block (2111).

8. The reverse lash testing tool of claim 1, wherein: The control assembly (22) comprises an oval-shaped sliding groove plate (221), the inner wall of the oval-shaped sliding groove plate (221) is sleeved on the outer wall of the resisting block (2111), the left and right sides of the oval-shaped sliding groove plate (221) are fixedly connected with columnar cross rods (222), and the outer walls of the two columnar cross rods (222) are slidably connected to the inner walls of the two slide rod guide blocks (217).

9. A reverse backlash testing tool of a lead screw drive according to claim 8, characterized in that: The outer ends of the two columnar cross bars (222) are fixedly connected with moving side plates (223), the front sides of the inner sides of the two moving side plates (223) are fixedly connected with columnar rods (225), the outer walls of the two columnar rods (225) are slidably connected with the inner walls of the middle portions of the two connecting seat side plates (211), the middle portions of the top and bottom of the two moving side plates (223) are fixedly connected with L-shaped columnar push rod connecting blocks (224), the inner sides of the two L-shaped columnar push rod connecting blocks (224) away from the moving side plates (223) are fixedly connected with columnar push rods (226), the inner ends of the left and right groups of columnar push rods (226) extend to the inner sides of the left and right groups of guide blocks (215), the outer walls of the left and right groups of columnar push rods (226) are slidably connected with the inner sides of the left and right groups of guide blocks (215), the inner ends of the left and right groups of columnar push rods (226) are fixedly connected with moving vertical plates (227), the top of the two moving vertical plates (227) are fixedly connected with the bottom rear sides of the two connecting rods (187), and the front sides of the bottom of the two moving vertical plates (227) are slidably connected with the inner walls of the two sides of the control bottom groove (19) in the rear side of the control bottom table (11).

10. A method for testing the reverse clearance of a lead screw transmission, applicable to the lead screw transmission reverse clearance testing tool of any one of claims 1-9, characterized in that it comprises the following steps: Step one: install the lead screw transmission component to be tested in the designated position of the testing table (1), and correctly connect the lead screw (15) between the two lead screw connecting blocks (13); Step two: rotate the lead screw (15) to move the sliding block (17) to the inner side of the two lead screw sleeves (182) and align the laser displacement sensor (16); Step three: start the electric push rod (1883) to clamp the sliding block (17) with the clamping plate (18812), then start the motor (219) to drive the positioning member (18) to slide the sliding block (17) for reverse clearance testing, and continuously observe the equipment operation state and data transmission during the testing process; Step four: after the testing is completed, stop the operation of the motor (219) to make the components return to the initial position, obtain the data of the lead screw transmission reverse clearance and other data from the control assembly (22), record and analyze the data, determine whether the reverse clearance of the lead screw transmission is within a reasonable range, and further investigate the cause and take corresponding measures if it is out of the range. ​

Images