Inspection Station for Screw Rod and Nut Parts

Abstract

The present invention relates to an inspection station for screw rods and nut parts, comprising a workbench including a workbench surface; an inspection station disposed on the workbench surface, which is used for inspecting the axial backward movement amount and the tooth engagement amount of screw rods and nut parts. The inspection station includes a grating ruler, a lifting drive part, a rotation drive part, an upper chuck and a lower chuck. The upper chuck can move up and down relative to the lower chuck under the drive of the lifting drive part, and the lower chuck can rotate under the drive of the rotation drive part; the upper chuck is used for clamping screw rod parts, and the lower chuck is used for clamping nut parts; the grating ruler is used for detecting and obtaining values; an electrical control system, and the inspection station is electrically connected to the electrical control system. The present invention realizes the semi-automatic inspection of the axial backward movement amount and the tooth engagement amount of screw rods and nut parts, improves the convenience and accuracy of inspection, has accurate clamping and positioning, simple operation, time-saving, labor-saving and high efficiency, and low labor intensity.

Description

Technical Field

[0001] The present invention relates to the technical field of basic braking products for railway locomotives and vehicles, and particularly to an inspection station for screw and nut parts. Background Art

[0002] The maintenance business of basic braking products for railway locomotives and vehicles is constantly expanding. At the same time, customers' requirements for the maintenance process level, quality ability, maintenance cycle, maintenance cost, and maintenance digitization of the brake caliper unit are also constantly increasing. As key components of the basic braking device, the performance of the brake caliper unit and the tread braking unit directly affects the running safety and riding comfort of the train.

[0003] The maintenance of the brake caliper unit mainly includes: caliper disassembly, cleaning, part repainting, bolt flaw detection, detection of replacement parts, re - surface treatment of alloy steel bolts, assembly, testing, packaging, etc.

[0004] For the existing inspection link of screw and nut replacement parts in the brake caliper unit, it mainly includes the detection of the axial backward movement amount and the tooth - meshing amount between the screw and the nut. Axial backward movement amount of the screw and nut: Screw a new adjusting nut or guiding nut onto the screw as a scale, and measure the axial backward clearance between the nut and the screw, which shall not exceed the standard value, otherwise replace the new screw. Tooth - meshing amount: Use a new connecting rod as a scale, and use a special measuring tool to measure the meshing amount between the screw teeth and the tooth surface of the connecting rod. The minimum limit value is N. When it is less than N, it is determined that the tooth surface of the screw is worn out and unqualified.

[0005] Currently, manual detection methods (ordinary calipers, gauges, and simple tooling) are generally used. The detection quality and efficiency mainly rely on highly skilled technical workers, resulting in problems such as low automation, low accuracy, and low digitization.

[0006] Therefore, based on years of experience and practice in the relevant industry, the inventor of the present invention proposes an inspection station for screw and nut parts to overcome the defects of the existing technology. Summary of the Invention

[0007] The purpose of the present invention is to provide an inspection station for screw and nut parts, which realizes semi - automatic detection of the axial backward movement amount and the tooth - meshing amount of screw and nut parts, improves the convenience and accuracy of detection, has accurate clamping and positioning, simple operation, is time - saving, labor - saving, efficient, and has low labor intensity.

[0008] The purpose of the present invention is achieved as follows. An inspection station for screw and nut parts includes

[0009] A workbench, including a workbench surface;

[0010] The inspection station is arranged on the workbench surface and is used for inspecting the axial retraction amount and the tooth meshing amount of screw and nut parts. The inspection station includes a grating ruler, a lifting drive part, a rotation drive part, an upper chuck and a lower chuck. The upper chuck can move up and down relative to the lower chuck under the drive of the lifting drive part, and the lower chuck can rotate under the drive of the rotation drive part. The upper chuck is used for clamping screw parts, and the lower chuck is used for clamping nut parts. The grating ruler is used for detecting and obtaining values.

[0011] The electrical control system, and the inspection station is electrically connected to the electrical control system.

[0012] In a preferred embodiment of the present invention, the inspection station further includes a main bracket. The lifting drive part includes a lifting motor, a lifting part screw rod, a lifting part nut and a lifting slide table. The lifting motor is arranged on the top of the main bracket. The lifting part screw rod is arranged vertically. The first end of the lifting part screw rod is connected to the lifting motor, and the second end of the lifting part screw rod is hinged to the main bracket. The lifting part nut is movably sleeved on the lifting part screw rod. The lifting part nut is connected to the lifting slide table through a connecting frame, and the upper chuck is connected to the lifting slide table. The lifting motor is electrically connected to the electrical control system.

[0013] In a preferred embodiment of the present invention, an upper photoelectric switch and a lower photoelectric switch are arranged on the main bracket, and a pull-press photoelectric switch block is arranged on the lifting slide table.

[0014] In a preferred embodiment of the present invention, a radial deviation correction structure is arranged on the lifting slide table.

[0015] In a preferred embodiment of the present invention, an adjusting screw rod is arranged on the lifting slide table, and a spring is sleeved on the adjusting screw rod.

[0016] In a preferred embodiment of the present invention, a linear guide rail arranged vertically is provided on the main bracket, and the lifting slide table can move up and down along the linear guide rail.

[0017] In a preferred embodiment of the present invention, the rotation drive part includes a rotation motor and a rotation structure. The rotation structure includes an outer sleeve part and a rotation shaft. The outer sleeve part is fixedly penetrated through the workbench surface, and the rotation shaft can rotatably penetrate through the outer sleeve part. The first end of the rotation shaft is connected to the rotation motor through a belt drive, and the second end of the rotation shaft is connected to the lower chuck. The rotation motor is electrically connected to the electrical control system.

[0018] In a preferred embodiment of the present invention, a ball bearing is arranged between the outer wall of the rotation shaft and the inner wall of the outer sleeve part.

[0019] In a preferred embodiment of the present invention, a first synchronous pulley is provided on the output shaft of the rotary motor, a second synchronous pulley is provided at the first end of the rotary shaft, and a transmission belt is sleeved on the first synchronous pulley and the second synchronous pulley; a fixing nut is provided on the rotary shaft on the side of the second synchronous pulley close to the outer sleeve portion, and a disc spring and a thrust ball bearing are provided on the rotary shaft between the fixing nut and the outer sleeve portion.

[0020] In a preferred embodiment of the present invention, both the upper chuck and the lower chuck are three-jaw chucks.

[0021] In a preferred embodiment of the present invention, a workbench cover is provided above the workbench surface, and a safety grating is provided on the inner side wall of the workbench cover near the detection station; a detection button is provided on the workbench surface.

[0022] In a preferred embodiment of the present invention, a display and a keyboard are provided on the workbench, and the display is electrically connected to the electrical control system; a barcode scanner and an NG bin are also provided on the workbench.

[0023] In a preferred embodiment of the present invention, the workbench further includes an industrial control cabinet provided below the workbench surface, and a fixture support plate is also provided below the workbench surface.

[0024] In a preferred embodiment of the present invention, rollers are provided at the bottom of the workbench.

[0025] As described above, the screw and nut part detection workstation of the present invention has the following beneficial effects:

[0026] In the screw and nut part detection workstation of the present invention, the detection station on the workbench surface can complete the detection of the axial backward movement amount and the tooth engagement amount of the screw and nut parts. The setting of photoelectric components such as the electrical control system and the grating ruler realizes the semi-automatic detection of the axial backward movement amount and the tooth engagement amount of the screw and nut parts, improving the convenience and accuracy of detection;

[0027] Adopting a chuck to clamp the workpiece and a standard part fixture, it has strong versatility, accurate clamping and positioning, simple operation, time-saving, labor-saving and efficient, and low labor intensity; only by switching the program and replacing the professional fixture standard parts can the detection mode be changed, and the equipment has strong versatility and is easy to operate;

[0028] In the rotary drive part, the rotary shaft and the balls of the ball bearing are lightly preloaded, with high rotational accuracy, good rigidity and long service life. The axial direction of the rotary shaft is preloaded by a pair of thrust ball bearings and a disc spring to eliminate the axial clearance;

[0029] A safety light curtain is configured on the workbench and it is started by double buttons. During the detection process, if the safety light curtain is triggered, the detection station stops moving. It is necessary to press the start detection button again to continue the detection, ensuring operation safety. Rollers are set at the bottom of the workbench to enable the movement of the workbench, which can be conveniently moved to the workpiece to be detected, improving the convenience of part detection and reducing the handling of the workpiece to be detected.

[0030] Through industrial identification technologies such as visual monitoring and data statistics, online tracking and process control of the detection process are realized; automatic collection, configuration, analysis, error prevention and traceability of the whole-process information data are achieved, improving the accuracy of product detection.

[0031] Based on the analysis of the detection process and requirements for screw and nut parts, by developing the detection workstations for screw and nut parts, the automation and digitalization degree of the brake caliper overhaul process can not only be improved, but also the data collection and analysis capabilities during the detection process can be enhanced, ultimately improving the overall overhaul level of the brake caliper. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The following drawings are only intended to illustrate and explain the present invention schematically and do not limit the scope of the present invention.

[0033] Wherein:

[0034] Figure 1 : is a perspective view of the detection workstations for screw and nut parts of the present invention.

[0035] Figure 2 : is a front view of the detection workstations for screw and nut parts of the present invention.

[0036] Figure 3 : is a perspective view of the detection station of the present invention.

[0037] Figure 4 : is a front view of the detection station of the present invention.

[0038] Figure 5 : is for Figure 4 A-A cross-sectional view in

[0039] Figure 6 : is a side view of the detection station of the present invention.

[0040] In the figure:

[0041] 1. Workbench;

[0042] 11. Workbench surface; 12. Workbench cover; 13. Industrial control cabinet; 14. Fixture support plate; 15. Roller;

[0043] 2. Detection station;

[0044] 21. Grating ruler;

[0045] 22. Lifting drive unit; 221. Lifting motor; 222. Lifting screw rod; 223. Lifting nut; 224. Lifting slide; 225. Upper photoelectric switch; 226. Lower photoelectric switch; 227. Pull-press photoelectric switch block;

[0046] 23. Rotation drive unit; 231. Rotation motor; 232. Rotation structure; 2321. Outer sleeve part; 2322. Rotation shaft; 233. Ball bearing; 234. First synchronous pulley; 235. Second synchronous pulley; 236. Transmission belt; 237. Fixed nut; 238. Belleville spring; 239. Thrust ball bearing;

[0047] 24. Upper chuck;

[0048] 25. Lower chuck;

[0049] 26. Main bracket; 261. Linear guide rail;

[0050] 27. Radial deviation correction structure;

[0051] 281. Adjusting screw; 282. Spring;

[0052] 3. Safety light curtain;

[0053] 4. Detection button;

[0054] 5. Display;

[0055] 6. Keyboard;

[0056] 7. Barcode scanner;

[0057] 8. NG bin. Detailed implementation manners

[0058] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0059] The specific embodiments of the present invention described herein are only for the purpose of explaining the present invention and should not be construed as limiting the present invention in any way. Under the teachings of the present invention, those skilled in the art can conceive of any possible variations based on the present invention, and all of these should be regarded as falling within the scope of the present invention. It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

[0061] As Figures 1 to 6 shown, the present invention provides a detection station for screw and nut parts, including a workbench 1, including a workbench surface 11;

[0062] A detection station 2 is disposed on the workbench surface 11. The detection station 2 is used for detecting the axial retraction amount and the tooth meshing amount of screw and nut parts. The detection station 2 includes a grating ruler 21, a lifting drive part 22, a rotation drive part 23, an upper chuck 24 and a lower chuck 25. The upper chuck 24 can move up and down relative to the lower chuck 25 under the drive of the lifting drive part 22, and the lower chuck 25 can rotate under the drive of the rotation drive part 23; the upper chuck 24 is used for clamping screw parts, and the lower chuck 25 is used for clamping nut parts. The use of chucks to clamp workpieces and standard fixture tools has strong versatility, accurate clamping and positioning, simple operation, time-saving, labor-saving and high efficiency, and low labor intensity; the grating ruler 21 is used for detecting and obtaining values; only by switching the program and replacing the professional fixture standard parts can the detection mode be changed. The equipment has strong versatility and is easy to operate;

[0063] An electrical control system, the detection station 2 is electrically connected to the electrical control system to realize the semi-automatic detection of the axial retraction amount and the tooth meshing amount of screw and nut parts, improving the convenience and accuracy of detection.

[0064] In the inspection station for screw and nut parts of the present invention, the inspection stations on the workbench surface can complete the inspection of the axial retraction amount and the tooth meshing amount of screw and nut parts, and the setting of optoelectronic components such as the electrical control system and grating scale, realizing the semi-automatic inspection of the axial retraction amount and the tooth meshing amount of screw and nut parts, improving the convenience and accuracy of inspection; adopting a chuck to clamp the workpiece and a standard part tooling, with strong versatility, accurate clamping and positioning, simple operation, time-saving, labor-saving and efficient, and low labor intensity; only by switching the program and replacing the professional tooling standard parts, the inspection mode can be changed, the equipment has strong versatility and is easy to operate.

[0065] Further, as Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 shown, the inspection station 2 further includes a main bracket 26. The lifting drive part 22 includes a lifting motor 221, a lifting part lead screw 222, a lifting part nut 223, and a lifting slide 224. The lifting motor 221 is arranged at the top of the main bracket 26. The lifting part lead screw 222 is arranged vertically. The first end of the lifting part lead screw 222 is connected to the lifting motor 221, and the second end of the lifting part lead screw 222 is hinged to the main bracket 26; the lifting part nut 223 is movably sleeved on the lifting part lead screw 222. The lifting part nut 223 is connected to the lifting slide 224 through a connecting frame, and an upper chuck 24 is connected to the lifting slide 224; the lifting motor 221 is electrically connected to the electrical control system.

[0066] Further, as Figure 6 shown, an upper photoelectric switch 225 and a lower photoelectric switch 226 are arranged on the main bracket 26, and a pull-press photoelectric switch block 227 is arranged on the lifting slide 224. The pull-press photoelectric switch block 227 moves synchronously with the upper chuck 24 and is used to trigger the upper photoelectric switch 225 or the lower photoelectric switch 226. The upper photoelectric switch 225 and the lower photoelectric switch 226 cooperate with the grating scale together to meet the automation of the grating scale value taking. The detection accuracy of the grating scale of the present invention is not less than ±0.03 mm, and the sensor resolution (the upper photoelectric switch 225 and the lower photoelectric switch 226) is not less than 0.001 mm.

[0067] Further, as Figure 4 、 Figure 5 shown, a radial deviation correction structure 27 is arranged on the lifting slide 224. The internal moving part (spring 282) of the radial deviation correction structure 27 has pre-pressure and no axial clearance, and can correct the errors existing in the workpiece itself and generated during clamping (coaxiality / verticality error within 0.5) within a certain range.

[0068] Further, as Figure 4As shown, an adjusting screw 281 is provided on the lifting and sliding table 224, and a spring 282 is sleeved on the adjusting screw 281. The adjusting screw 281 and the spring 282 are used for axial adjustment.

[0069] Furthermore, as Figure 3 , Figure 4 , Figure 5 , Figure 6 shown, a linear guide rail 261 is vertically provided on the main bracket 26, and the lifting and sliding table 224 can move up and down along the linear guide rail 261.

[0070] Furthermore, as Figure 4 , Figure 5 , Figure 6 shown, the rotary drive part 23 includes a rotary motor 231 and a rotary structure 232. The rotary structure 232 includes an outer sleeve part 2321 and a rotary shaft 2322. The outer sleeve part 2321 is fixedly passed through the workbench surface 11, and the rotary shaft 2322 is rotatably passed through the outer sleeve part 2321. The first end of the rotary shaft 2322 is connected to the rotary motor 231 through a belt drive, and the second end of the rotary shaft 2322 is connected to the lower chuck 25; the rotary motor 231 is electrically connected to the electrical control system.

[0071] Furthermore, as Figure 5 shown, a ball bearing 233 is provided between the outer wall of the rotary shaft and the inner wall of the outer sleeve part.

[0072] Furthermore, as Figure 5 shown, a first synchronous pulley 234 is provided on the output shaft of the rotary motor 231, a second synchronous pulley 235 is provided at the first end of the rotary shaft, and a transmission belt 236 is sleeved on the first synchronous pulley 234 and the second synchronous pulley 235; a fixing nut 237 is provided on the rotary shaft 2322 on the side of the second synchronous pulley close to the outer sleeve part, and a disc spring 238 and a thrust ball bearing 239 are provided on the rotary shaft between the fixing nut 237 and the outer sleeve part 2321.

[0073] In the rotary drive part 23, the rotary shaft 2322 and the balls of the ball bearing 233 are lightly preloaded, with high rotational accuracy, good rigidity and long service life. The axial direction of the rotary shaft 2322 is preloaded by a pair of thrust ball bearings 239 and a disc spring 238 to eliminate the axial clearance.

[0074] Furthermore, both the upper chuck 24 and the lower chuck 25 are three-jaw chucks.

[0075] Furthermore, as Figure 1 , Figure 2As shown in the figure, a workbench cover 12 is provided above the workbench surface 11, and a safety light curtain 3 is provided on the inner side wall of the workbench cover 12 near the inspection station; a detection button 4 is provided on the workbench surface 11. In this embodiment, the detection button is a double-button. The safety light curtain 3 and the detection button 4 are electrically connected to the electrical control system.

[0076] A safety light curtain 3 is configured on the workbench. It is started by a double-button. During the detection process, if the safety light curtain 3 is triggered, the inspection station 2 stops moving. It is necessary to press the start detection button 4 again to continue the detection, ensuring operation safety.

[0077] Further, as Figure 1 、 Figure 2 shown in the figure, a display 5 and a keyboard 6 are provided on the workbench 1. The display 5 is used for visual monitoring, and both the display 5 and the keyboard 6 are electrically connected to the electrical control system; a barcode scanner 7 and an NG bin 8 are also provided on the workbench 1. The barcode scanner 7 is used to scan and identify the detected workpiece. The barcode scanner 7 is electrically connected to the electrical control system, and the scanned and identified information is transmitted to the electrical control system and displayed on the display.

[0078] Through industrial identification technologies such as visual monitoring and data statistics, online tracking and process control of the detection process are realized; automatic acquisition, configuration, analysis, error prevention, and traceability of the whole-process information data are achieved, improving the accuracy of product detection.

[0079] The NG bin 8 uses a general NG bin and has an NG part rejection confirmation function. If the NG part is not placed in the NG bin, the equipment cannot continue the detection. If it is detected that the NG part is not placed in the NG bin within a certain time, an alarm will be issued. To remove the NG part in the NG bin, it is necessary to click the NG removal button.

[0080] Further, as Figure 1 、 Figure 2 shown in the figure, the workbench 1 further includes an industrial control cabinet 13 provided below the workbench surface. The electrical control system is placed in the industrial control cabinet 13; a fixture support plate 14 is also provided below the workbench surface.

[0081] Further, as Figure 1 、 Figure 2 shown in the figure, rollers 15 are provided at the bottom of the workbench 1 to realize the movement of the workbench, which can be conveniently moved to the position of the detected workpiece, improving the convenience of part detection and reducing the handling of the detected workpiece.

[0082] Detection process of the backward movement amount of the lead screw nut shaft:

[0083] 1. Press the detection button 4 with both hands, and the lifting motor 221 drives the workpiece or the standard workpiece (lead screw) on the upper chuck 24 to move to the set position (the set initial position is the top of the main support 26);

[0084] 2. The lower chuck 25 (with a clamping nut installed on the lower chuck 25) is driven by the rotary motor 231 to rotate and perform an interpolation movement with the lifting motor 221. The nut is screwed into the set position on the lead screw, and the rotation stops (if the safety light curtain is triggered during the interpolation process, the rotation will pause).

[0085] 3. The lifting motor 221 drives the upper chuck 24 to move downward until the lower optical switch 226 is triggered, and the grating scale 21 takes a value.

[0086] 4. The lifting motor 221 drives the upper chuck 24 to move upward until the upper optical switch 225 is triggered, and the grating scale 21 takes a value.

[0087] 5. The difference between the two values taken by the grating scale 21 is the backward movement value of the lead screw / nut axis.

[0088] 6. The lifting motor 221 drives the upper chuck 24 to move downward to the middle position between the upper optical switch 225 and the lower optical switch 226.

[0089] 7. The lifting motor 221 and the rotary motor 231 perform an interpolation movement, and the nut is unscrewed.

[0090] 8. The lifting motor 221 drives the upper chuck 24 to move upward to the initial position.

[0091] 9. After the detection is completed, the workpiece is removed.

[0092] Detection process of the tooth engagement amount:

[0093] 1. Press the detection button 4 with both hands. The lifting motor 221 drives the workpiece on the upper chuck or the standard workpiece (lead screw) to move downward to the set position (the upper optical switch is triggered at this position).

[0094] 2. The rotary motor 231 drives the lower chuck 25 to rotate a certain angle (the angle value can be set). The upper chuck 24 is fixed, and the tooth surface of the upper workpiece (lead screw) is closely attached to the tooth surface of the lower part (nut) under the action of the spring force. The grating scale 21 dynamically takes a value, and the difference between the maximum value and the minimum value of the grating scale is the tooth engagement amount value.

[0095] 3. The lifting motor 221 drives the upper chuck 24 to move upward to the initial position.

[0096] 4. After the detection is completed, the workpiece is removed.

[0097] In a specific embodiment of the present invention, the lead screw and nut part detection station of the present invention is used for detecting the backward movement amount of the lead screw nut axis and the tooth engagement amount. The per capita production capacity is increased by more than 30%; the automatic acquisition rate of maintenance data is increased by more than 60%; the digitalization rate of maintenance data is increased by more than 80%.

[0098] The lead screw and nut part detection station of the present invention has the following beneficial effects:

[0099] In the inspection station for screw and nut parts of the present invention, the inspection stations on the workbench surface can complete the inspection of the axial retraction amount and the tooth engagement amount of screw and nut parts, and the setting of optoelectronic components such as the electrical control system and grating ruler, realizing semi-automatic inspection of the axial retraction amount and the tooth engagement amount of screw and nut parts, improving the convenience and accuracy of inspection;

[0100] The chuck is used to clamp the workpiece and the standard part tooling, which has strong versatility, accurate clamping and positioning, simple operation, time-saving, labor-saving and efficient, and low labor intensity; only by switching the program and replacing the professional tooling standard parts can the inspection mode be changed, and the equipment has strong versatility and is easy to operate;

[0101] In the rotary drive part, the rotary shaft and the balls of the ball bearing are lightly preloaded, with high rotational accuracy, good rigidity and long service life. The axial direction of the rotary shaft is preloaded by a pair of thrust ball bearings and a butterfly spring to eliminate the axial clearance;

[0102] A safety grating is configured on the workbench and started by a double-button. During the inspection process, if the safety grating is triggered, the inspection station stops moving. It is necessary to press the start inspection button again to continue the inspection, ensuring operation safety; rollers are arranged at the bottom of the workbench to realize the movement of the workbench, which can be conveniently moved to the inspection workpiece, improving the convenience of part inspection and reducing the handling of inspection workpieces;

[0103] Through industrial identification technologies such as visual monitoring and data statistics, online tracking and process control of the inspection process are realized; automatic collection, configuration, analysis, error prevention and traceability of the whole process information data are realized, improving the accuracy of product inspection.

[0104] The above are only illustrative specific embodiments of the present invention and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A detection station for screw and nut parts, characterized in that, it includes, a workbench including a workbench surface; a detection station provided on the workbench surface, the detection station is used for detecting the axial retraction amount and the tooth meshing amount of screw and nut parts, the detection station includes a grating ruler, a lifting drive part, a rotation drive part, an upper chuck and a lower chuck, the upper chuck can move up and down relative to the lower chuck under the drive of the lifting drive part, and the lower chuck can rotate under the drive of the rotation drive part; the upper chuck is used for clamping screw parts, and the lower chuck is used for clamping nut parts; the grating ruler is used for detecting and obtaining values; an electrical control system, the detection station is electrically connected to the electrical control system; the detection station further includes a main bracket, the lifting drive part includes a lifting motor, a lifting part screw rod, a lifting part nut, and a lifting slide, the lifting motor is arranged on the top of the main bracket, the lifting part screw rod is arranged vertically, the first end of the lifting part screw rod is connected to the lifting motor, and the second end of the lifting part screw rod is hinged to the main bracket; the lifting part nut is movably sleeved on the lifting part screw rod, the lifting part nut is connected to the lifting slide through a connecting frame, and the upper chuck is connected to the lifting slide; the lifting motor is electrically connected to the electrical control system; an upper photoelectric switch and a lower photoelectric switch are arranged on the main bracket, and a pull-press photoelectric switch block is arranged on the lifting slide; the rotation drive part includes a rotation motor and a rotation structure, the rotation structure includes an outer sleeve part and a rotation shaft, the outer sleeve part is fixedly penetrated through the workbench surface, the rotation shaft is rotatably penetrated through the outer sleeve part, the first end of the rotation shaft is connected to the rotation motor through a belt drive, and the second end of the rotation shaft is connected to the lower chuck; the rotation motor is electrically connected to the electrical control system; a ball bearing is arranged between the outer wall of the rotation shaft and the inner wall of the outer sleeve part; a first synchronous belt pulley is arranged on the output shaft of the rotation motor, a second synchronous belt pulley is arranged at the first end of the rotation shaft, and a transmission belt is sleeved on the first synchronous belt pulley and the second synchronous belt pulley; a fixing nut is arranged on the rotation shaft on the side of the second synchronous belt pulley close to the outer sleeve part, and a disc spring and a thrust ball bearing are arranged between the fixing nut and the outer sleeve part on the rotation shaft.

2. The detection station for screw and nut parts according to claim 1, characterized in that, a radial deviation correction structure is arranged on the lifting slide.

3. The detection station for screw and nut parts according to claim 2, characterized in that, an adjusting screw is arranged on the lifting slide, and a spring is sleeved on the adjusting screw.

4. The detection station for screw and nut parts according to claim 1, characterized in that, a vertical linear guide rail is arranged on the main bracket, and the lifting slide can move up and down along the linear guide rail.

5. The detection station for screw and nut parts according to claim 1, characterized in that, both the upper chuck and the lower chuck are three-jaw chucks.

6. The detection station for screw and nut parts according to claim 1, characterized in that, A workbench cover is provided above the workbench surface, and a safety light curtain is provided on the inner side wall of the workbench cover near the inspection station; a detection button is provided on the workbench surface.

7. The inspection station for screw and nut parts according to claim 1, characterized in that a display and a keyboard are provided on the workbench, and the display is electrically connected to the electrical control system; a barcode scanner and an NG bin are also provided on the workbench.

8. The inspection station for screw and nut parts according to claim 1, characterized in that the workbench further includes an industrial control cabinet disposed below the workbench surface, and a fixture support plate is also provided below the workbench surface.

9. The inspection station for screw and nut parts according to claim 1, characterized in that rollers are provided at the bottom of the workbench.

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