Screw rod gap detection device and detection method

Abstract

The present invention provides a screw gap detection device and detection method, including a slider support seat, a detection slider slidably arranged on one side of the slider support seat, a limit slider slidably arranged on the other side of the slider support seat and connected to the detection slider, a screw positioning chuck fixedly arranged at one end of the detection slider along the sliding direction, a nut positioning chuck arranged in front of the screw positioning chuck along the sliding direction, a nut locking and positioning mechanism fixedly arranged on the limit slider, a screw locking and positioning mechanism fixedly arranged on the slider support seat, and a gap detector; the detection slider forms a detection end at the end away from the screw positioning chuck, and the gap detector is aligned with the detection end. The advantages of the present invention: it can realize both radial gap detection and axial gap detection on one device, which can reduce the trouble caused by screw handling and improve the detection efficiency of screw gap; at the same time, it can effectively reduce the detection error of screw gap and improve the detection accuracy.

Description

[Technical field]

[0001] The present invention relates to the technical field of screw rod detection, and in particular to a screw rod gap detection device and a detection method. [Background technology]

[0002] The screw is the most commonly used transmission element in tool machinery and precision machinery. Its main function is to convert rotational motion into linear motion, or to convert torque into axial repetitive force. It also has the characteristics of high precision, reversibility and high efficiency.

[0003] The lead screw includes a screw rod and a nut that are used together. In order for the lead screw to meet the precision requirements, the axial clearance and radial clearance between the screw rod and the nut need to be within a certain range, otherwise the lead screw will not meet the precision requirements.

[0004] Although there are detection devices for screw rod clearance detection in the prior art, the existing detection devices can only detect the axial clearance of the screw rod or can only detect the radial clearance of the screw rod, and cannot complete axial and radial detection in the same detection device, resulting in that after one detection device completes the detection, it needs to be moved to another detection device for further detection. The entire detection process is relatively complicated and the detection efficiency is low. At the same time, the existing detection device cannot effectively position the screw rod, resulting in a large deviation in the detection accuracy, and the accuracy of the screw rod cannot be guaranteed when in use. In view of the above-mentioned problems, the inventor of this case conducted an in-depth study on the problem, and thus this case was created. [Summary of the invention]

[0005] The technical problem to be solved by the present invention is to provide a screw gap detection device and a detection method to solve the problem that the existing detection device cannot complete axial and radial detection in the same detection device, the detection efficiency is low, and at the same time there is a large deviation in the detection accuracy, and the accuracy of the screw cannot be guaranteed when in use.

[0006] The present invention is achieved in that:

[0007] In a first aspect, a screw gap detection device comprises a slider support seat, a detection slider slidably arranged on one side of the slider support seat, a limit slider slidably arranged on the other side of the slider support seat and connected to the detection slider, a screw positioning chuck fixedly arranged at one end of the detection slider along the sliding direction, a nut positioning chuck arranged in front of the screw positioning chuck along the sliding direction, a nut locking and positioning mechanism fixedly arranged on the limit slider, a screw locking and positioning mechanism fixedly arranged on the slider support seat, and a gap detector; the detection slider forms a detection end at an end away from the screw positioning chuck, and the gap detector is arranged to align with the detection end;

[0008] The nut locking positioning mechanism and the screw locking positioning mechanism are both located on one side of the slider support seat, and the screw locking positioning mechanism is above the nut locking positioning mechanism; the screw locking positioning mechanism is provided with a screw locking slot, and the nut locking positioning mechanism is provided with a nut locking slot at a position corresponding to the screw locking slot; the screw positioning chuck and the nut positioning chuck are both located on the other side of the slider support seat; the nut positioning chuck is provided with a nut clamping hole, and the screw positioning chuck is provided with a screw clamping hole, and the center lines of the nut clamping hole and the screw clamping hole coincide.

[0009] Furthermore, a detection slot is formed in the middle of the slider support seat along the horizontal direction, a connecting block is slidably arranged in the detection slot, one end of the connecting block is fixedly connected to the detection slider, and the other end of the connecting block is fixedly connected to the limiting slide.

[0010] Furthermore, the slider support seat is provided with cross roller guide rails along the sliding direction at positions above and below the detection slide groove, and the upper and lower ends of the limit slide plate are provided with guide slide seats matched with the cross roller guide rails.

[0011] Furthermore, the nut locking positioning mechanism includes a nut locking base, a nut tightening block and a first adjusting screw; the nut locking base is fixed on the limiting slide; the nut locking base is provided with the nut locking slot along the vertical direction, and the nut tightening block is arranged in the nut locking slot; one end of the first adjusting screw is fixedly connected to the nut tightening block, the middle part of the first adjusting screw is threadedly connected to the nut locking base, the other end of the first adjusting screw extends to the outside of the nut locking base, and the other end of the first adjusting screw is fixedly provided with a first rotating operating part.

[0012] Furthermore, the screw locking and positioning mechanism includes a screw locking base, a screw tightening block, a second adjusting screw and a limit stopper;

[0013] The screw locking base is fixed on the top of the slider support base; one side of the screw locking base is provided with the screw locking groove in the vertical direction; the limit stop blocks the outside of the screw locking groove, and one end of the limit stop is rotatably connected to the screw locking base, and the other end of the limit stop is detachably connected to the screw locking base; the screw tightening block is located on the inner side of the limit stop, one end of the second adjusting screw is fixedly connected to the screw tightening block, the middle part of the second adjusting screw is threadedly connected to the limit stop, the other end of the second adjusting screw extends to the outside of the limit stop, and the other end of the second adjusting screw is fixedly provided with a second rotating operating part.

[0014] Furthermore, the nut locking groove includes a rectangular groove and a first V-shaped groove formed by a first inclined groove wall and a second inclined groove wall; the screw locking groove is a second V-shaped groove formed by a third inclined groove wall and a fourth inclined groove wall; the top angles of the first V-shaped groove and the second V-shaped groove are arranged facing each other.

[0015] Furthermore, the nut positioning chuck is a quick chuck with three jaws.

[0016] Furthermore, the screw positioning chuck is a spring chuck.

[0017] Furthermore, a chuck support plate is fixedly provided at one end of the slider support seat, and the chuck support plate and the slider support seat are arranged perpendicular to each other; the nut positioning chuck is fixed on a side of the chuck support plate away from the screw positioning chuck.

[0018] In a second aspect, a detection method is provided, the detection method comprising:

[0019] When the axial clearance of the lead screw is detected, one end of the lead screw is passed through the nut positioning chuck through the nut clamping hole, and one end of the lead screw is inserted into the screw clamping hole, and the lead screw nut is rotated along the lead screw until the lead screw nut is located in the nut clamping hole; one end of the lead screw is clamped by the screw positioning chuck, and the lead screw nut is clamped by the nut positioning chuck, and the detection probe of the gap detector is brought into contact with the detection end of the detection slide; a thrust is applied to the detection slide in a direction away from the detection probe, and the axial clearance value is read using the gap detector;

[0020] When the radial clearance of the lead screw is detected, the lower end of the lead screw is passed through the nut locking slot, the lead screw nut is rotated along the lead screw until the lead screw nut is located in the nut locking slot, and the upper end of the lead screw is inserted into the screw locking slot; the lead screw nut is locked in the nut locking slot by the nut locking positioning mechanism, the upper end of the lead screw is locked in the screw locking slot by the screw locking positioning mechanism, and the detection probe of the gap detector is brought into contact with the detection end of the detection slide; a thrust is applied to the detection slide in a direction away from the detection probe, and the radial clearance value is read using the gap detector.

[0021] By adopting the technical solution of the present invention, at least the following beneficial effects are achieved:

[0022] 1. Since the nut locking and positioning mechanism and the screw locking and positioning mechanism for clamping and fixing during radial detection are located on one side of the slider support seat, and the screw positioning chuck and the nut positioning chuck for locking and fixing during axial detection are located on the other side of the slider support seat, it can be ensured that the two do not affect each other; at the same time, the screw positioning chuck is fixedly connected to the detection slider, the nut locking and positioning mechanism is fixedly connected to the limit slide, and the detection slider and the limit slide are fixedly connected together, so when the detection slider is pushed, the screw positioning chuck and the nut locking and positioning mechanism can be driven to move together, so that both radial clearance detection and axial clearance detection can be completed on one device, which can reduce the trouble caused by the handling of the screw rod and help to improve the detection efficiency of the screw rod clearance; and whether the screw positioning chuck and the nut positioning chuck cooperate with each other, or the nut locking and positioning mechanism and the screw locking and positioning mechanism cooperate with each other, the screw rod can be effectively positioned, so the detection error of the screw rod clearance (including axial clearance and radial clearance) can be effectively reduced, thereby ensuring the accuracy of the screw rod when in use.

[0023] 2. By setting the nut locking groove to have a first V-groove for positioning the lead screw nut, and setting the screw locking groove to a second V-groove, the top angles of the first V-groove and the second V-groove are arranged opposite to each other; since the V-groove is positioned by combining two planes, its most prominent advantage is good centering, especially for cylindrical objects, the accuracy will not be affected by different diameters, and more accurate positioning can be achieved; therefore, the present invention positions the lead screw nut and the lead screw by using the first V-groove and the second V-groove to coordinately position the lead screw nut and the lead screw, so that the positioning reference axis of the entire lead screw always falls on the symmetry plane between the two inclined surfaces of the V-groove, and is not affected by the positioning reference diameter error, that is, the center lines of the lead screw nut and the lead screw can be made to coincide, thereby ensuring the detection accuracy of the radial clearance, and can adapt to the detection and positioning requirements of lead screws of various sizes, and is also very convenient to install and use.

[0024] 3. The detection slider, connecting block and limit slide are guided to slide linearly by using the cross roller guide and guide slide seat. Because the cross roller guide has high sensitivity and the coefficients of dynamic friction and static friction are very close, the movement is stable and it is not easy to have movement error during the mobile detection process, which can improve the detection accuracy of the screw gap. At the same time, the cross roller guide has high positioning accuracy and the repeat positioning accuracy can reach 0.2μm; it also has low friction resistance, easy movement, low wear and good accuracy retention.

Brief Description of the Drawings

[0025] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0026] Figure 1 is a top view of the detection device of the present invention;

[0027] Figure 2 is a rear view of the detection device of the present invention;

[0028] Figure 3 is a front view of the detection device of the present invention;

[0029] Figure 4 It is a structural diagram of the slider support seat in the present invention;

[0030] Figure 5 It is a connection structure diagram of the detection slider and the limit slider in the present invention;

[0031] Figure 6 is a side view of the supporting vertical plate of the present invention;

[0032] Figure 7 It is a structural diagram of the nut locking and positioning mechanism of the present invention;

[0033] Figure 8 It is a structural diagram of a nut locking base in the present invention;

[0034] Fig. 9 It is a structural diagram of the screw rod tightening block in the present invention;

[0035] Fig.10 It is a structural diagram of the limit stopper in the present invention;

[0036] Fig.11 It is a structural diagram of the screw locking base in the present invention;

[0037] Fig.12 It is a structural diagram of the detection device of the present invention when detecting the axial clearance of the screw rod;

[0038] Fig.13 It is a structural diagram of the detection device of the present invention when detecting the radial clearance of the screw rod.

[0039] Description of reference numerals:

[0040] 100-detection device, 200-screw screw, 300-screw nut, 1-slider support seat, 11-detection slide, 12-support base, 13-support vertical plate, 14-cross roller guide, 15-chuck support plate, 151-screw through hole, 2-detection slider, 21-quasi-detection end, 3-limit slide plate, 31-guide slide, 4-screw positioning chuck, 41-screw clamping hole, 5-nut positioning chuck, 51-nut clamping hole, 52-clamping claw, 6-nut locking positioning mechanism, 61-nut locking slot, 611-rectangular slot, 612-first V-shaped slot, 6121-first inclined slot wall, 6122-second inclined slot wall, 62-nut locking base, 63-nut top tightening block, 631- The first abutting plane, 64-the first adjusting screw, 65-the first rotating operating part, 7-the screw locking positioning mechanism, 71-the screw locking slot, 711-the second V-shaped slot, 7111-the third inclined slot wall, 7112-the fourth inclined slot wall, 72-the screw locking base, 73-the screw tightening block, 731-the second abutting plane, 74-the second adjusting screw, 75-the limit stopper, 751-the rotating opening, 752-the slot, 76-the second rotating operating part, 77-the first screw fastener, 78-the second screw fastener, 8-the gap detector, 81-the detection probe, 82-the dial gauge body, 83-the slide rail, 84-the adjusting slider, 85-the vertical rod, 86-the upper and lower movable parts, 87-the horizontal pull rod, 9-the connecting block. [Specific implementation method]

[0041] In order to better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] It should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing these embodiments and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. In addition, the terms "first", "second", etc., etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0043] See also Figures 1 to 13As shown, a preferred embodiment of a screw gap detection device 100 of the present invention, the detection device 100 includes a slider support seat 1, a detection slider 2 slidably arranged on one side of the slider support seat 1, a limiting slider 3 slidably arranged on the other side of the slider support seat 1 and connected to the detection slider 2, a screw positioning chuck 4 fixedly arranged at one end of the detection slider 2 along the sliding direction, a nut positioning chuck 5 arranged in front of the screw positioning chuck 4 along the sliding direction, a nut locking and positioning mechanism 6 fixedly arranged on the limiting slider 3, a screw locking and positioning mechanism 7 fixedly arranged on the slider support seat 1 and a gap detector 8; the detection slider 2 forms a detection end 21 at the end away from the screw positioning chuck 4, and the gap detector 8 is arranged to align with the detection end 21. In a specific implementation, when the screw is positioned, the detection probe 81 of the gap detector 8 is brought into contact with the detection end 21, so that when the detection slider 2 is used to push the screw to move axially or push the screw nut to move radially, the gap detector 8 can be used to obtain the axial gap value or the radial gap value.

[0044] Among them, the slider support seat 1 is used to support various components; the detection slider 2 is used to push the lead screw to move axially or push the lead screw nut to move radially after the lead screw is positioned, so as to realize the detection of axial clearance or radial clearance; the limiting slide 3 is used to limit the detection slider 2, so that the detection slider 2 will not be separated from the slider support seat 1, and the limiting slide 3 can move synchronously with the detection slider 2; the screw positioning chuck 4 is used to clamp and fix the lead screw during axial clearance detection; the nut positioning chuck 5 is used to clamp and fix the lead screw nut during axial clearance detection; the nut locking and positioning mechanism 6 is used to lock and fix the lead screw nut during radial clearance detection; the screw locking and positioning mechanism 7 is used to lock and fix the lead screw during radial clearance detection; the gap detector 8 is used to detect the gap.

[0045] The nut locking positioning mechanism 6 and the screw locking positioning mechanism 7 are both located on one side of the slider support seat 1, and the screw locking positioning mechanism 7 is located above the nut locking positioning mechanism 6; the screw locking positioning mechanism 7 has a screw locking slot 71, and the nut locking positioning mechanism 6 is provided with a nut locking slot 61 at a position corresponding to the screw locking slot 71, so that the screw locking slot 71 and the nut locking slot 61 cooperate to lock and fix the upper ends of the lead screw nut and the lead screw, thereby It is convenient to detect the radial clearance of the screw rod; the screw positioning chuck 4 and the nut positioning chuck 5 are both located on the other side of the slider support seat 1; the nut positioning chuck 5 has a nut clamping hole 51, and the screw positioning chuck 4 has a screw clamping hole 41, and the center lines of the nut clamping hole 51 and the screw clamping hole 41 coincide with each other, so that after the nut positioning chuck 5 and the screw positioning chuck 4 are clamped on the screw rod, the two ends of the screw rod are on the same horizontal line, thereby ensuring the detection accuracy of the axial clearance.

[0046] In the present invention, since the nut locking and positioning mechanism 6 and the screw locking and positioning mechanism 7 used for clamping and fixing during radial detection are located on one side of the slider support seat 1, and the screw positioning chuck 4 and the nut positioning chuck 5 used for locking and fixing during axial detection are located on the other side of the slider support seat 1, it can be ensured that the two do not affect each other. At the same time, the screw positioning chuck 4 is fixedly connected to the detection slider 2, the nut locking positioning mechanism 6 is fixedly connected to the limit slide 3, and the detection slider 2 and the limit slide 3 are fixedly connected together. Therefore, when the detection slider 2 is pushed, the screw positioning chuck 4 and the nut locking positioning mechanism 6 can be driven to move together, so that both radial clearance detection and axial clearance detection can be completed on one device, which can reduce the trouble caused by screw rod transportation and help to improve the detection efficiency of screw rod clearance; and whether the screw positioning chuck 4 and the nut positioning chuck 5 cooperate with each other, or the nut locking positioning mechanism 6 and the screw locking positioning mechanism 7 cooperate with each other, the screw rod can be effectively positioned, so the detection error of the screw rod clearance (including axial clearance and radial clearance) can be effectively reduced, thereby ensuring the accuracy of the screw rod when in use.

[0047] As a specific embodiment of the present invention, a detection groove 11 is formed in the middle of the slider support seat 1 along the horizontal direction, and a connecting block 9 is slidably arranged in the detection groove 11, and one end of the connecting block 9 is fixedly connected to the detection slider 2, and the other end of the connecting block 9 is fixedly connected to the limiting slide plate 3; in this way, the detection slider 2, the connecting block 9 and the limiting slide plate 3 can form a whole, and the three can move together when moving. The detection slider 2, the connecting block 9 and the limiting slide plate 3 can be fixedly connected by welding; at the same time, the limiting slide plate 3 can limit the detection slider 2 to ensure that the detection slider 2 will not separate from the slider support seat 1 during the sliding process.

[0048] Preferably, the connecting block 9 is a rectangular parallelepiped structure, and the width of the detection slot 11 is slightly larger than the height of the connecting block 9 , which can facilitate the connecting block 9 to pass through the detection slot 11 on the one hand, and enable the connecting block 9 to move smoothly along the detection slot 11 on the other hand.

[0049] As a specific embodiment of the present invention, the detection end 21 of the detection slider 2 is formed with a plane, which can facilitate the detection probe 81 of the gap detector 8 to contact any position of the detection end 21. Preferably, the detection slider 2 is a rectangular parallelepiped structure.

[0050] As a specific embodiment of the present invention, in order to make the slider support seat 1 more stable and reliable as a whole and ensure stability during detection, the slider support seat 1 includes a support base 12 and a support stand 13 vertically arranged on the support base 12, and the detection slide 11 is arranged in the middle of the support stand 13 along the horizontal direction. The support stand 13 and the support base 12 can be fixed together by welding, or they can be fixed together by bolts.

[0051] As a specific embodiment of the present invention, the slider support seat 1 is provided with a cross roller guide rail 14 along the sliding direction at the upper and lower positions of the detection slide groove 11. Specifically, the cross roller guide rail 14 is set on the support vertical plate 13, and the upper and lower ends of the limit slide plate 3 are provided with a guide slide seat 31 that matches the cross roller guide rail 14. In the present invention, the upper and lower ends of the limit slide plate 3 are slidably connected with the cross roller guide rail 14 arranged above and below the detection slide groove 11, so that under the cooperation and guidance of the cross roller guide rail 14 and the guide slide seat 31, the detection slider 2, the connecting block 9 and the limit slide plate 3 can only slide linearly along the cross roller guide rail 14.

[0052] The present invention guides the detection slider 2, the connection block 9 and the limit slide plate 3 to slide linearly by using the cross roller guide 14 and the guide slide seat 31 to cooperate with each other. Because the cross roller guide 14 has high sensitivity and the coefficients of dynamic friction and static friction are very small, the movement is stable and it is not easy to have movement errors during the movement detection process, thereby improving the detection accuracy of the screw gap. At the same time, the cross roller guide 14 has high positioning accuracy and the repeat positioning accuracy can reach 0.2μm; and the friction resistance is small, the movement is light, the wear is small, and the accuracy retention is good.

[0053] As a specific embodiment of the present invention, the nut locking and positioning mechanism 6 includes a nut locking base 62, a nut tightening block 63 and a first adjusting screw 64; the nut locking base 62 is fixed on the limiting slide 3, so that the nut locking base 62 can slide with the limiting slide 3, thereby enabling the entire nut locking and positioning mechanism 6 to move. In specific implementation, the nut locking base 62 can be fixedly connected to the limiting slide 3 by welding or by bolt locking; the nut locking base 62 is provided with the nut locking member 62 in the vertical direction. Tightening groove 61, so that the lead screw nut and the lead screw enter the nut locking groove 61, and the nut pressing block 63 is arranged in the nut locking groove 61; one end of the first adjusting screw 64 is fixedly connected with the nut pressing block 63, the middle part of the first adjusting screw 64 is threadedly connected with the nut locking base 62, the other end of the first adjusting screw 64 extends to the outside of the nut locking base 62, and the other end of the first adjusting screw 64 is fixedly provided with a first rotating operating part 65, so as to facilitate the rotation adjustment of the first adjusting screw 64 through the first rotating operating part 65.

[0054] When the nut locking and positioning mechanism 6 of the present invention is used to lock and position the screw nut, after the screw nut enters the nut locking slot 61, the first adjusting screw 64 is rotated by the first rotating operating part 65 so that the first adjusting screw 64 drives the nut pressing block 63 to move in the direction close to the screw nut, and the rotation of the first adjusting screw 64 is stopped until the nut pressing block 63 presses the screw nut into the nut locking slot 61. After the detection is completed, the first adjusting screw 64 is reversely rotated by the first rotating operating part 65 so that the first adjusting screw 64 drives the nut pressing block 63 to move in the direction away from the screw nut, and the nut pressing block 63 loosens the screw nut, so that the screw can be taken out of the nut locking slot 61.

[0055] As a specific embodiment of the present invention, the screw locking and positioning mechanism 7 includes a screw locking base 72, a screw top block 73, a second adjusting screw 74 and a limit stopper 75;

[0056] The screw locking base 72 is fixed to the top of the slider support base 1, specifically, the screw locking base 72 is fixed to the top of the support vertical plate 13 by welding or bolt locking, so as to ensure that the screw locking base 72 cannot move; one side of the screw locking base 72 is provided with the screw locking groove 71 in the vertical direction, so that the lead screw can enter the screw locking groove 71; the limit stopper 75 blocks the outside of the screw locking groove 71, and one end of the limit stopper 75 is rotatably connected to the screw locking base 72 Then, the other end of the limit stop block 75 is detachably connected to the screw locking base 72; the screw pressing block 73 is located on the inner side of the limit stop block 75, one end of the second adjusting screw 74 is fixedly connected to the screw pressing block 73, the middle part of the second adjusting screw 74 is threadedly connected to the limit stop block 75, the other end of the second adjusting screw 74 extends to the outer side of the limit stop block 75, and the other end of the second adjusting screw 74 is fixedly provided with a second rotating operating part 76 to facilitate the rotation adjustment of the second adjusting screw 74 through the second rotating operating part 76.

[0057] When the present invention is used in practice, since the nut locking positioning mechanism 6 is located at the lower position of the screw locking positioning mechanism 7, it is necessary to make the lower ends of the screw nut and the screw rod enter the nut locking groove 61 first, and then the upper end of the screw rod screw is inserted into the screw locking groove 71; and the length of the screw rod screw is relatively long, and its upper end will be higher than the screw locking groove 71; therefore, in order to facilitate the locking and positioning of the upper end of the screw rod screw, the present invention adopts a limit stopper 75 to be arranged on the outer side of the screw locking groove 71, and one end of the limit stopper 75 is rotatably connected to the screw locking base 72, and the other end of the limit stopper 75 is detachably connected to the screw locking base 72, so that when in use, one end of the limit stopper 75 can be removed and the limit stopper 75 can be rotated to open the notch of the screw locking groove 71, so that the upper end of the screw rod screw can enter the screw locking groove 71 conveniently.

[0058] When the screw locking and positioning mechanism 7 is used to lock and position the lead screw, one end of the limit stop block 75 is removed and the limit stop block 75 is rotated to open the notch of the screw locking slot 71; the upper end of the lead screw is pushed into the screw locking slot 71 from the opened notch, and one end of the limit stop block 75 is connected to the screw locking base 72, thereby closing the notch of the screw locking slot 71; then the second adjusting screw 74 is rotated so that the second adjusting screw 74 drives the screw pressing block 73 to move in the direction close to the lead screw, and the screw pressing block 73 presses the lead screw in the screw locking slot 71, and then the rotation of the second adjusting screw 74 is stopped. After the detection is completed, the second adjusting screw 74 is rotated in the opposite direction so that the second adjusting screw 74 drives the screw tightening block 73 to move in the direction away from the lead screw, and the screw tightening block 73 loosens the lead screw; at the same time, one end of the limit stop block 75 is removed and the limit stop block 75 is rotated to open the slot of the screw locking slot 71, and the lead screw can be taken out.

[0059] As a specific embodiment of the present invention, the nut locking slot 61 includes a rectangular slot 611 and a first V-shaped slot 612 formed by a first inclined slot wall 6121 and a second inclined slot wall 6122; preferably, the length and width of the first inclined slot wall 6121 and the second inclined slot wall 6122 of the first V-shaped slot 612 are equal. One end of the rectangular slot 611 is connected to the first V-shaped slot 612. After the screw nut enters the nut locking slot 61, the nut pressing block 63 can press the screw nut into the first V-shaped slot 612. Through the mutual cooperation between the nut pressing block 63 and the first V-shaped slot 612, it can be ensured that the screw nut cannot rotate or move axially after pressing, so that the screw nut can be effectively locked and positioned.

[0060] Preferably, the nut tightening block 63 has a cylindrical structure, and a first abutting plane 631 is formed at one end of the nut tightening block 63 facing the first V-shaped groove 612, so as to prevent the nut tightening block 63 from causing damage to the screw nut when tightening the screw nut.

[0061] As a specific embodiment of the present invention, the screw locking groove 71 is a second V-shaped groove 711 formed by a third inclined groove wall 7111 and a fourth inclined groove wall 7112; preferably, the third inclined groove wall 7111 and the fourth inclined groove wall 7112 of the second V-shaped groove 711 have equal lengths and widths. After the upper end of the lead screw enters the screw locking groove 71, the screw pressing block 73 can press the lead screw into the second V-shaped groove 711. Through the mutual cooperation between the screw pressing block 73 and the second V-shaped groove 711, it can be ensured that the lead screw cannot rotate or move axially after pressing, thereby realizing effective locking and positioning of the lead screw.

[0062] In order to better cooperate with the second V-shaped groove 711 to tighten the lead screw, the screw tightening block 73 is a truncated cone structure; and the screw tightening block 73 is formed with a second abutting plane 731 at one end facing the second V-shaped groove 711, so as to prevent the screw tightening block 73 from causing damage to the lead screw when tightening the lead screw.

[0063] As a specific embodiment of the present invention, the top angles of the first V-shaped groove 612 and the second V-shaped groove 711 are arranged opposite to each other, and the first adjusting screw 64 and the second adjusting screw 74 face in opposite directions. In this way, during specific use, the first adjusting screw 64 can drive the nut tightening block 63 to tighten the lead screw nut from one side, and the second adjusting screw 74 can drive the screw tightening block 73 to tighten the lead screw from the other side, thereby ensuring that the lead screw is in a vertical state after positioning is completed, thereby ensuring the detection accuracy of the radial clearance.

[0064] In the present invention, the nut locking groove 61 is provided with a first V-groove 612 for positioning the lead screw nut, and the screw locking groove 71 is provided as a second V-groove 711, and the top angles of the first V-groove 612 and the second V-groove 711 are arranged opposite to each other; since the V-groove is positioned by combining two planes, its most prominent advantage is good centering, especially for cylindrical objects, the accuracy will not be affected by different diameters, and more accurate positioning can be achieved; therefore, the present invention adopts the first V-groove 612 and the second V-groove 711 to position the lead screw nut and the lead screw, so that the positioning reference axis of the entire lead screw always falls on the symmetry plane between the two inclined surfaces of the V-groove without being affected by the positioning reference diameter error, that is, the center lines of the lead screw nut and the lead screw can be made to coincide, thereby ensuring the detection accuracy of the radial clearance, and can adapt to the detection and positioning requirements of lead screws of various sizes, and is also very convenient to install and use.

[0065] As a specific implementation of the present invention, the screw locking base 72 is provided with a first screw member 77 and a second screw member 78 on both sides of the screw locking slot 71, respectively. Specifically, the first screw member 77 and the second screw member 78 are both bolts; a rotation opening 751 is opened in the middle of one end of the limit stop 75, and the first screw member 77 passes through the rotation opening 751. In a specific implementation, the aperture of the rotation opening 751 is larger than the outer diameter of the threaded portion of the first screw member 77, so that one end of the limit stop 75 can be rotated around the first screw member 76; a clamping groove 752 is opened at the bottom of the other end of the limit stop 75, and the clamping groove 752 is clamped on the second screw member 78.

[0066] In the specific implementation of the present invention, when it is necessary to open the notch of the screw locking slot 71, the second screw member 78 and the first screw member 77 are both screwed outward for a certain length, the detachable end of the limit stop 75 is lifted upward to make the slot 752 leave the second screw member 78, and the rotating end of the limit stop 75 is rotated around the first screw member 77 by a certain angle to open the notch; and when it is necessary to close the notch of the screw locking slot 71, the slot 752 of the limit stop 75 is inserted into the second screw member 78, and the second screw member 78 and the first screw member 77 are screwed inward, so that the limit stop 75 and the screw locking base 72 can be fixed together.

[0067] As a specific embodiment of the present invention, the nut positioning chuck 5 is a quick chuck with three clamping jaws 52. The quick chuck is an existing device and will not be described in detail here. The present invention adopts a quick chuck with three clamping jaws 52 as the nut positioning chuck 5, which can ensure the clamping effect of the screw nut on the one hand, and can quickly clamp the screw nut on the other hand, thereby improving the efficiency of clamping and positioning.

[0068] As a specific embodiment of the present invention, the screw positioning chuck 4 is a spring chuck, which is an existing device and will not be introduced in detail here. The present invention adopts a spring chuck as the screw positioning chuck 4, which can not only ensure the clamping effect of the lead screw, but also improve the efficiency of clamping and positioning.

[0069] As a specific embodiment of the present invention, a chuck support plate 15 is fixedly provided at one end of the slider support seat 1, and the chuck support plate 15 and the slider support seat 1 are arranged perpendicular to each other. Specifically, the chuck support plate 15 and the support base 12 and the support vertical plate 13 are all perpendicular to each other, so that the entire slider support seat 1 can be ensured to be more stable and reliable.

[0070] As a specific embodiment of the present invention, the nut positioning chuck 5 is fixed on the side of the chuck support plate 15 away from the screw positioning chuck 4, and a screw through hole 151 is formed on the chuck support plate 15; the nut clamping hole 51 coincides with the center line of the screw through hole 151 to facilitate the passage of the lead screw and ensure that the positioned lead screw is on the same horizontal line. Because the spacing between the nut positioning chuck 5 and the screw positioning chuck 4 is relatively limited, by fixing the nut positioning chuck 5 on the side away from the screw positioning chuck 4, it is more convenient to position the lead screw, and it is also convenient to remove the lead screw after the inspection is completed, that is, it is more convenient to operate.

[0071] As a specific embodiment of the present invention, the gap detector 8 includes a micrometer body 82, a slide rail 83 fixed on the slider support seat 1 along the front-to-back direction, an adjusting slider 84 slidably arranged on the slide rail 83, a vertical rod 85 fixed on the adjusting slider 84, an upper and lower movable part 86 movably mounted on the vertical rod 85, and a horizontal pull-out rod 87 inserted on the upper and lower movable part 86 along the horizontal direction; the micrometer body 82 is installed on the horizontal pull-out rod 87.

[0072] When the gap detector 8 is used, the position of the dial gauge body 82 can be adjusted forward and backward by using the slide rail 83 and the adjustment slider 84, the position of the dial gauge body 82 can be adjusted up and down by using the vertical rod 85 and the upper and lower movable parts 86, and the position of the dial gauge body 82 can be adjusted horizontally left and right by using the horizontal pull rod 87 and the upper and lower movable parts 86, so as to facilitate the adjustment of the detection probe 81 of the dial gauge body 82 to contact the detection end 21 of the detection slider 2.

[0073] Based on the above detection device 100, the present invention further provides a detection method, which is used to detect the gap of the screw rod. The detection method includes:

[0074] Please refer to Fig.12 As shown, when the axial clearance of the screw is detected, one end of the screw rod 200 is passed through the nut positioning chuck 5 through the nut clamping hole 51, and one end of the screw rod 200 is inserted into the screw clamping hole 41, so as to clamp and fix the end of the screw rod 200, and the screw nut 300 is rotated along the screw rod 200 until the screw nut 300 is located in the nut clamping hole 51, so as to clamp and fix the screw nut 300; one end of the screw rod 200 is clamped by the screw positioning chuck 4 to complete the fixation of the end of the screw rod 200, and the screw nut 300 is clamped by the nut positioning chuck 5 to complete the screw nut 300. The detection probe 81 of the gap detector 8 is fixed, and the detection end 21 of the detection slider 2 is contacted by the detection probe 81. The gap detector 8 can move and adjust the position of the detection probe 81 up and down, left and right, front and back, so as to ensure that the detection probe 81 can contact the detection end 21 of the detection slider 2; a thrust away from the detection probe 81 is applied to the detection slider 2, and the detection slider 2 can transmit the thrust to the lead screw. Since there is an axial gap between the lead screw 200 and the lead nut 300, the lead screw 200 will move in the horizontal direction under the action of the thrust. The distance moved by the lead screw 200 is the axial gap, and the axial gap value is read by the gap detector 8;

[0075] Please refer to Fig.13As shown, when the radial clearance of the screw is detected, the lower end of the screw rod 200 is passed through the nut locking groove 61, and the screw nut 300 is rotated along the screw rod 200 until the screw nut 300 is located in the nut locking groove 61, so as to facilitate the locking and fixing of the screw nut 300, and the upper end of the screw rod 200 is inserted into the screw locking groove 71, so as to facilitate the locking and fixing of the upper end of the screw rod 200; the screw nut 300 is locked in the nut locking groove 61 by the nut locking positioning mechanism 6, and the screw nut 300 is fixed; the upper end of the screw rod 200 is locked in the screw locking groove 71 by the screw locking positioning mechanism 7, and the screw nut 200 is fixed. 00 is fixed at the upper end, and the detection probe 81 of the gap detector 8 is in contact with the detection end 21 of the detection slider 2. The gap detector 8 can move and adjust the up and down, left and right, front and back positions of the detection probe 81, so as to ensure that the detection probe 81 can be in contact with the detection end 21 of the detection slider 2; a thrust away from the detection probe 81 is applied to the detection slider 2, and the detection slider 2 can transmit the thrust to the lead screw nut 300. Because there is a radial gap between the lead screw 200 and the lead screw nut 300, the lead screw nut 300 will move in the horizontal direction under the action of the thrust. The distance moved by the lead screw nut 300 is the radial gap, and the radial gap value is read using the gap detector 8.

[0076] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A screw gap detection device, characterized in that: The invention comprises a slider support seat, a detection slider slidably arranged on one side of the slider support seat, a limit slider slidably arranged on the other side of the slider support seat and connected to the detection slider, a screw positioning chuck fixedly arranged at one end of the detection slider along the sliding direction, a nut positioning chuck arranged in front of the screw positioning chuck along the sliding direction, a nut locking and positioning mechanism fixedly arranged on the limit slider, a screw locking and positioning mechanism fixedly arranged on the slider support seat, and a gap detector; the detection slider forms a detection end at the end away from the screw positioning chuck, and the gap detector is arranged to align with the detection end; A detection slot is formed in the middle of the slider support seat along the horizontal direction, a connecting block is slidably arranged in the detection slot, and one end of the connecting block is fixedly connected to the detection slider, and the other end of the connecting block is fixedly connected to the limit slide; the slider support seat includes a support base and a support vertical plate vertically arranged on the support base, and the detection slot is arranged in the middle of the support vertical plate along the horizontal direction; The nut locking positioning mechanism and the screw locking positioning mechanism are both located on one side of the slider support seat, and the screw locking positioning mechanism is above the nut locking positioning mechanism; the screw locking positioning mechanism is provided with a screw locking slot, and the nut locking positioning mechanism is provided with a nut locking slot at a position corresponding to the screw locking slot; the screw positioning chuck and the nut positioning chuck are both located on the other side of the slider support seat; the nut positioning chuck is provided with a nut clamping hole, and the screw positioning chuck is provided with a screw clamping hole, and the center lines of the nut clamping hole and the screw clamping hole coincide.

2. The detection device according to claim 1, characterized in that: The slider support seat is provided with cross roller guide rails along the sliding direction at the upper and lower positions of the detection slide groove, and the upper and lower ends of the limit slide plate are provided with guide slide seats matched with the cross roller guide rails.

3. The detection device according to claim 1, characterized in that: The nut locking and positioning mechanism includes a nut locking base, a nut tightening block and a first adjusting screw; the nut locking base is fixed on the limiting slide; the nut locking base is provided with the nut locking slot along the vertical direction, and the nut tightening block is arranged in the nut locking slot; one end of the first adjusting screw is fixedly connected to the nut tightening block, the middle part of the first adjusting screw is threadedly connected to the nut locking base, the other end of the first adjusting screw extends to the outside of the nut locking base, and the other end of the first adjusting screw is fixedly provided with a first rotating operating part.

4. The detection device according to claim 3, characterized in that: The screw locking and positioning mechanism comprises a screw locking base, a screw locking block, a second adjusting screw and a limit stopper; The screw locking base is fixed on the top of the slider support base; one side of the screw locking base is provided with the screw locking groove in the vertical direction; the limit stop blocks the outside of the screw locking groove, and one end of the limit stop is rotatably connected to the screw locking base, and the other end of the limit stop is detachably connected to the screw locking base; the screw tightening block is located on the inner side of the limit stop, one end of the second adjusting screw is fixedly connected to the screw tightening block, the middle part of the second adjusting screw is threadedly connected to the limit stop, the other end of the second adjusting screw extends to the outside of the limit stop, and the other end of the second adjusting screw is fixedly provided with a second rotating operating part.

5. The detection device according to claim 4, characterized in that: The nut locking groove includes a rectangular groove and a first V-shaped groove formed by a first inclined groove wall and a second inclined groove wall; the screw locking groove is a second V-shaped groove formed by a third inclined groove wall and a fourth inclined groove wall; the top angles of the first V-shaped groove and the second V-shaped groove are arranged facing each other.

6. The detection device according to claim 1, characterized in that: The nut positioning chuck is a quick chuck with three jaws.

7. The detection device according to claim 1, characterized in that: The screw positioning chuck is a spring chuck.

8. The detection device according to claim 1, characterized in that: A chuck support plate is fixedly disposed at one end of the slider support seat, and the chuck support plate and the slider support seat are arranged perpendicular to each other; the nut positioning chuck is fixed on a side of the chuck support plate away from the screw positioning chuck.

9. A detection method based on the detection device according to any one of claims 1 to 8, characterized in that: The detection method comprises: When the axial clearance of the lead screw is detected, one end of the lead screw is passed through the nut positioning chuck through the nut clamping hole, and one end of the lead screw is inserted into the screw clamping hole, and the lead screw nut is rotated along the lead screw until the lead screw nut is located in the nut clamping hole; one end of the lead screw is clamped by the screw positioning chuck, and the lead screw nut is clamped by the nut positioning chuck, and the detection probe of the gap detector is brought into contact with the detection end of the detection slide; a thrust is applied to the detection slide in a direction away from the detection probe, and the axial clearance value is read using the gap detector; When the radial clearance of the lead screw is detected, the lower end of the lead screw is passed through the nut locking slot, the lead screw nut is rotated along the lead screw until the lead screw nut is located in the nut locking slot, and the upper end of the lead screw is inserted into the screw locking slot; the lead screw nut is locked in the nut locking slot by the nut locking positioning mechanism, the upper end of the lead screw is locked in the screw locking slot by the screw locking positioning mechanism, and the detection probe of the gap detector is brought into contact with the detection end of the detection slide; a thrust is applied to the detection slide in a direction away from the detection probe, and the radial clearance value is read using the gap detector.

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