A laser measuring device and method for automotive ball screws

Abstract

This invention discloses a laser measuring device and method for automotive ball screws, relating to the field of laser measurement technology. It includes: a mounting base, the mounting base being C-shaped; a rotating device connected to one side of the mounting base, the rotating device providing power for the rotation of the ball screw; a rotational bearing device; a linear limiting device; and a laser emitter. This invention utilizes the cooperation between a turntable and a rotational alignment mechanism. Through the mutual attraction between two alignment magnets, a unidirectional alignment block is attracted to a state of contact with the flat surface, thus limiting the rotation of the turntable and making its rotation more precise. Furthermore, the downward tapping of the unidirectional alignment block on the inclined surface also indicates to the operator that the turntable has rotated 360 degrees, preventing over-rotation and making the lead measurement of the ball screw more accurate. This improves the tolerance for manual rotation and reduces errors.

Description

Technical Field

[0001] This invention relates to the field of laser measurement technology, and in particular to a laser measuring device and method for automotive ball screws. Background Technology

[0002] In the automotive manufacturing industry, ball screws are key components for achieving precise transmission, and their lead accuracy directly determines the operational performance of the vehicle's powertrain, braking system, and intelligent driving assistance systems. Accurately measuring the ball screw lead is a crucial step in ensuring the assembly quality of automotive parts and the reliability of the entire vehicle.

[0003] Currently, existing ball screw lead measurement technologies have significant drawbacks. Traditional measuring devices mostly rely on manual operation or simple mechanical structures to drive the screw rotation, making it difficult to accurately control the screw's rotation angle to a standard 360 degrees each time. If a motor drive is used, the lack of a high-precision angle feedback and calibration mechanism may lead to the accumulation of angular deviations during screw rotation, thus affecting the correspondence between the linear displacement of the nut seat and the number of screw rotations.

[0004] If the rotation of the ball screw relies on manual operation, it is difficult to ensure the consistency of the rotation angle each time. Operators may under-rotate or over-rotate during manual rotation, leading to errors in lead calculation. For example, if the screw does not rotate precisely one revolution, the measured displacement will not accurately reflect the actual lead, affecting the reliability of the measurement results. Consequently, the margin for error in manual rotation is low and prone to inaccuracies. Summary of the Invention

[0005] The purpose of this invention is to provide a laser measuring device and method for automotive ball screws to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a laser measuring device for automotive ball screws, comprising:

[0007] Mounting base, wherein the mounting base is C-shaped;

[0008] A rotating device, connected to one side of the mounting base, is used to provide power for the rotation of the ball screw;

[0009] A rotating bearing device is inserted and installed on the other side of the mounting base. The rotating bearing device is used to bear the rotation of the ball screw.

[0010] A linear limiting device is installed on the inner side of the mounting base and is used to guide the movement of the ball nut seat.

[0011] A laser emitter, mounted on a mounting base, measures the movement distance of the ball nut seat by emitting a laser to detect the lead of the ball screw.

[0012] Preferably, the rotating device includes:

[0013] The main shaft is rotatably connected to the mounting base via bearings, and one end of the main shaft is connected to a ball screw via a coupling;

[0014] A turntable, which is connected to the other end of the main shaft, and a handle is mounted on the turntable;

[0015] A rotation alignment mechanism is mounted on a mounting base and is used to align the rotation of the turntable.

[0016] Preferably, the rotation alignment mechanism includes:

[0017] A fixing frame, which is fixedly installed on a mounting base;

[0018] A unidirectional alignment block, which is located below the fixing frame;

[0019] An insert rod, one end of which is fixedly connected to a one-way alignment block, the insert rod is movably fitted with a fixing frame, and the insert rod is T-shaped;

[0020] The ball bearing has a ball groove at the bottom of the unidirectional alignment block, and the ball bearing is movably disposed inside the ball groove.

[0021] Preferably, the turntable has an alignment groove on its outer side, the unidirectional alignment block cooperates with the alignment groove, the alignment groove includes a beveled part and a flat part, the flat part and the contact surface of the unidirectional alignment block are vertical, and an alignment magnet is fixedly embedded at the contact point between the flat part and the unidirectional alignment block, and adjacent alignment magnets are in a state of opposite magnetic poles facing each other.

[0022] Preferably, the rotating bearing device includes:

[0023] A threaded rod, which is movably connected to the mounting base;

[0024] A rotating nut seat, wherein the rotating nut seat is threadedly engaged with a threaded rod, and the rotating nut seat is disposed on the outside of the mounting base;

[0025] A retaining ring is fixedly installed on the outside of the mounting base, and the retaining ring is rotatably engaged with a rotating nut seat via a bearing;

[0026] A rotating toothed ring is fixedly installed on the outside of a rotating nut seat, and the outer side of the rotating toothed ring is provided with a one-way slot in a ring array.

[0027] An angle positioning mechanism is mounted on a fixed ring and is used to limit the rotation of the rotating gear ring in one direction.

[0028] The mounting cylinder has a movable plate fixedly connected to one end of the threaded rod, a guide slide fixedly connected to the movable plate, and a cylinder connected to the movable plate. The cylinder is rotatably engaged with the mounting cylinder through a bearing.

[0029] The elastic clamp is fixedly installed on the inner wall of the mounting cylinder, and the elastic clamp is arranged in a ring array. The cross-section of the elastic clamp is V-shaped, and the surface of the elastic clamp is connected to an anti-friction pad.

[0030] A guide cylinder is fixedly installed on a mounting base. The guide cylinder has a sliding groove inside, and the guide slide and the inner cavity of the sliding groove cooperate with each other.

[0031] Preferably, the angle positioning mechanism includes:

[0032] The fixing seat is fixedly installed on the fixing ring;

[0033] A sliding block, which is slidably fitted inside the fixed base;

[0034] A one-way locking block is connected to the bottom of a sliding block, and the one-way locking block and the sliding block are integrally formed. The one-way locking block cooperates with the one-way slot on the rotating gear ring.

[0035] A spring is installed inside the fixed base and is used to provide elastic support for the sliding block.

[0036] Preferably, the angle positioning mechanism further includes:

[0037] A sliding column, one end of which is fixedly connected to a sliding block, and a slot that mates with the sliding column is provided on the fixed base;

[0038] The rotating hanging ring is connected to the fixed column above the sliding column. The rotating hanging ring is rotatably connected to the fixed column and is U-shaped. The sliding column has an annular groove, and the rotating hanging ring and the inner cavity of the annular groove cooperate with each other.

[0039] Preferably, the linear limiting device includes:

[0040] Mounting plate, which is bolted to ball nut seat;

[0041] A laser receiver is fixedly mounted on the top of the mounting plate, and the laser receiver is positioned opposite the laser emitter.

[0042] Preferably, the linear limiting device further includes:

[0043] A guide rod, which is fixedly installed on the inner side of the mounting base;

[0044] The slide block is slidably engaged with the guide rod;

[0045] A connecting plate is fixedly installed on the top of the slide block, and the connecting plate is connected to the mounting plate by bolts.

[0046] Another objective of this invention is to provide a measurement method for an automotive ball screw laser measuring device, comprising the following steps:

[0047] Step 1: First, connect one end of the ball screw to the main shaft using a coupling. Install the mounting plate onto the ball nut seat using bolts, and then connect the mounting plate to the connecting plate using bolts. Then, rotate the rotating gear ring clockwise, causing the one-way groove on the rotating gear ring to push the one-way locking block upwards, thus unlocking the angle positioning mechanism's engagement of the rotating gear ring. Through the sliding fit between the guide slide and the guide cylinder, the threaded rod is restricted from linear sliding and cannot rotate. Combined with the threaded connection between the rotating nut seat and the threaded rod, when the rotating gear ring is rotated, the rotation of the rotating nut seat provides thrust for the linear movement of the threaded rod, allowing the threaded rod to push the mounting cylinder towards the ball screw. At this time, the other end of the ball screw squeezes the elastic clamp, causing the elastic clamp to deform elastically and then press the ball screw, thus bearing the rotation of the other end of the ball screw.

[0048] Step Two: Rotate the handle on the turntable. The inclined surface on the turntable guides the relative position between the unidirectional alignment block and the turntable. When the turntable rotates counterclockwise, it pushes the unidirectional alignment block out of the alignment groove. Continue rotating the turntable counterclockwise until the unidirectional alignment block aligns with the alignment groove again. Due to its own weight, the unidirectional alignment block falls back to its initial state of engagement with the alignment groove. At this point, the turntable has rotated one revolution. The rotating device drives the ball screw to rotate synchronously. With the help of the linear limiting device, the ball screw can linearly advance the ball nut seat a certain distance. The mounting plate synchronously drives the laser receiver to move, thereby changing the relative position between the laser emitter and the laser receiver. The movement distance of the ball nut seat can then be measured to calculate the lead of one revolution of the ball screw.

[0049] The technical effects and advantages of this invention are as follows:

[0050] This invention utilizes the cooperation between a turntable and a rotation alignment mechanism. Through the mutual attraction between two alignment magnets, a unidirectional alignment block is attracted to the flat surface, thus limiting the rotation of the turntable and making its rotation more precise. Furthermore, the downward tapping of the unidirectional alignment block on the inclined surface indicates to the operator that the turntable has rotated 360 degrees, preventing over-rotation and resulting in more accurate lead measurement of the ball screw. Since the turntable only unlocks when rotating counterclockwise and returns to its original position when rotating clockwise to engage with the unidirectional alignment block, it can be easily rotated back to its original position by the attraction between the two alignment magnets if over-rotation occurs. This improves the tolerance for manual rotation and reduces errors. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0052] Figure 2 This is a schematic diagram of the front structure of the present invention.

[0053] Figure 3 This is a schematic diagram of the internal structure of the rotating bearing device of the present invention.

[0054] Figure 4 This is a schematic diagram of the side structure of the rotating gear ring of the present invention.

[0055] Figure 5 This is a schematic diagram of the internal structure of the angle positioning mechanism of the present invention.

[0056] Figure 6 This is a schematic diagram of the side structure of the rotating device of the present invention.

[0057] Figure 7 This is a schematic diagram of the internal structure of the rotation alignment mechanism of the present invention.

[0058] Figure 8 This is a schematic diagram of the three-dimensional structure of the turntable of the present invention.

[0059] In the diagram: 1. Mounting base; 2. Rotating device; 21. Turntable; 22. Rotational alignment mechanism; 201. Alignment groove; 2011. Inclined part; 2012. Flat part; 202. Alignment magnet; 221. One-way alignment block; 222. Insertion rod; 223. Ball bearing; 3. Rotational bearing device; 31. Threaded rod; 32. Rotary nut seat; 33. Fixing ring; 34. Rotating toothed ring; 35. Angle positioning mechanism; 351. Fixing base; 352. Sliding block; 353. One-way locking block; 354. Spring; 355. Sliding column; 356. Rotating hanging ring; 36. Mounting cylinder; 37. Elastic clamping plate; 38. Guide cylinder; 4. Linear limiting device; 41. Mounting plate; 42. Laser receiver; 43. Guide rod; 44. Slide seat; 45. Connecting plate; 5. Laser emitter. Detailed Implementation

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0061] This invention provides, for example Figure 1-8 A laser measuring device for automotive ball screws, as shown, includes: a mounting base 1, which is C-shaped; a rotating device 2 connected to one side of the mounting base 1, which provides power for the rotation of the ball screw; a rotating bearing device 3, which is inserted and installed on the other side of the mounting base 1, which supports the rotation of the ball screw; a linear limiting device 4 installed inside the mounting base 1, which guides the movement of the ball nut seat; and a laser emitter 5, which is mounted on the mounting base 1 and measures the movement distance of the ball nut seat by emitting laser light, thereby detecting the lead of the ball screw.

[0062] The rotating device 2 includes: a main shaft, which is rotatably connected to the mounting base 1 via bearings, and one end of the main shaft is connected to a ball screw via a coupling; a turntable 21, which is connected to the other end of the main shaft and has a handle mounted on it; and a rotation alignment mechanism 22, which is mounted on the mounting base 1 and is used to align the rotation of the turntable 21. The rotation of the turntable 21 drives the rotation of the main shaft, which in turn drives the rotation of the ball screw synchronously via the coupling. The rotation alignment mechanism 22 facilitates the alignment of the rotation of the turntable 21.

[0063] Furthermore, the rotation alignment mechanism 22 includes: a fixed frame, which is fixedly mounted on the mounting base 1; a one-way alignment block 221, which is located below the fixed frame; an insert rod 222, one end of which is fixedly connected to the one-way alignment block 221, and the insert rod 222 is movably engaged with the fixed frame and is T-shaped; and a ball bearing 223, the bottom of the one-way alignment block 221 having a ball groove, the ball bearing 223 being movably disposed inside the ball groove, and the insert rod 222 being slidably connected to the fixed frame via a linear bearing. When the turntable 21 moves from the fixed frame to the fixed frame, the rotation alignment mechanism 222 is adjusted accordingly. Figure 6 When the position shown is rotated 360 degrees, the one-way alignment block 221 is aligned with the inner cavity of the alignment groove 201. At this time, the one-way alignment block 221 falls due to its own weight and can be locked inside the alignment groove 201, indicating that the turntable 21 has rotated one revolution. The fixing bracket facilitates the limiting of the sliding of the insertion rod 222, making the up-and-down sliding of the insertion rod 222 smoother. The setting of the ball bearing 223 allows the ball bearing 223 to roll on the outer surface of the turntable 21 when the turntable 21 rotates, making the rotation of the turntable 21 smoother. The outer side of the turntable 21 has an alignment groove 221. 01. The unidirectional alignment block 221 and the alignment groove 201 cooperate with each other. The alignment groove 201 includes an inclined surface 2011 and a flat surface 2012. The inclined surface 2011 facilitates the guidance of the movement of the unidirectional alignment block 221. Since the inclined surface 2011 is in contact with the outer circular surface of the turntable 21, when the turntable 21 is rotated counterclockwise, the unidirectional alignment block 221 can be sent out of the inner cavity of the alignment groove 201. The vertical arrangement of the flat surface 2012 allows it to fit against the vertical surface of the unidirectional alignment block 221, so as to ensure that the unidirectional alignment block 221 is aligned after the turntable 21 rotates one revolution. Positioning block 221 can limit the rotation of turntable 21 to prevent it from reversing and ensure rotational accuracy. The contact surface between the flat part 2012 and the one-way positioning block 221 is vertical. Positioning magnets 202 are fixedly embedded at the contact points between the flat part 2012 and the one-way positioning block 221, with adjacent magnets having opposite magnetic poles. Through the mutual attraction between the two positioning magnets 202, the one-way positioning block 221 is attracted to the flat part 2012, thus limiting the rotation of turntable 21 and ensuring its rotational accuracy. The movement is more precise, and the downward tapping of the one-way alignment block 221 on the surface of the inclined surface 2011 can also indicate to the operator that the turntable 21 has rotated 360 degrees, preventing the turntable 21 from over-rotating, making the lead measurement of the ball screw more accurate. Since the turntable 21 is only unlocked when rotated counterclockwise, it can return to its original position when rotated clockwise to the state of being in contact with the one-way alignment block 221. Through the attraction between the two alignment magnets 202, when the turntable 21 is over-rotated, it can also be rotated back to the state of being in contact with the one-way alignment block 221, thereby improving the fault tolerance rate of manual rotation and reducing errors.

[0064] The rotating bearing device 3 includes: a threaded rod 31, which is movably connected to the mounting base 1; a rotating nut seat 32, which is threadedly engaged with the threaded rod 31 and is located on the outside of the mounting base 1; a fixed ring 33, which is fixedly installed on the outside of the mounting base 1 and is rotatably engaged with the rotating nut seat 32 via a bearing; a rotating gear ring 34, which is fixedly installed on the outside of the rotating nut seat 32 and has one-way slots arranged in a ring array on its outer side; an angle positioning mechanism 35, which is installed on the fixed ring 33 and is used to unidirectionally limit the rotation of the rotating gear ring 34; a mounting cylinder 36; and the threaded rod 31. One end is fixedly connected to a movable plate, and a guide slide is fixedly connected to the movable plate. A cylinder is connected to the movable plate, and the cylinder rotates with the mounting cylinder 36 via a bearing. Elastic clamping plates 37 are fixedly installed on the inner wall of the mounting cylinder 36 and are arranged in a circular array. The cross-section of the elastic clamping plates 37 is V-shaped, and anti-friction pads are connected to the surface of the elastic clamping plates 37. A guide cylinder 38 is fixedly installed on the mounting base 1. A sliding groove is opened inside the guide cylinder 38, and the guide slide cooperates with the inner cavity of the sliding groove. Through the rotational connection between the fixed ring 33 and the rotating nut seat 32, the fixed ring 33 can limit the rotation of the rotating nut seat 32, making the rotation of the rotating nut seat 32 more stable. The threaded engagement between the rotating nut seat 32 and the threaded rod 31 facilitates the movement of the threaded rod 31. When the rotating nut seat 32 rotates, it advances the threaded rod 31, allowing it to push the mounting cylinder 36 towards the ball screw. This facilitates bearing the rotation of the ball screw end. The angle positioning mechanism 35 limits the rotation of the rotating gear ring 34, ensuring it can only rotate clockwise in one direction. When the elastic clamp 37 elastically clamps and fixes the end of the screw, the angle positioning mechanism 35 engages the rotating gear ring 34, preventing its rotation and thus preventing the rotating nut seat 32 from rotating due to vibration. The rod 31 provides more stable support for the mounting cylinder 36. Through the cooperation between the guide slide and the slide groove, the movement of the threaded rod 31 is easily limited, so that the threaded rod 31 can only move in a straight line. This means that when the rotating nut seat 32 is rotated, the threaded rod 31 can be pushed to move in a straight line, so that the mounting cylinder 36 can be pushed out from the inside of the guide cylinder 38 to cooperate with the lead screw. Through the elastic setting of the elastic clamp 37, when the end of the lead screw cooperates with the mounting cylinder 36, the elastic clamp 37 will be squeezed, so that the included angle of the elastic clamp 37 is squeezed to a gradually decreasing state, so as to achieve self-centering adaptive clamping of the end of the ball screw, avoiding the over-clamping of traditional fixtures, which would cause damage to the lead screw, and ensuring the stable rotation of the lead screw during the measurement process.

[0065] Specifically, the angle positioning mechanism 35 includes: a fixed base 351, which is fixedly mounted on the fixed ring 33; a sliding block 352, which is slidably fitted inside the fixed base 351; a one-way locking block 353, which is connected to the bottom of the sliding block 352 and is integrally formed with the sliding block 352, and the one-way locking block 353 cooperates with the one-way slot on the rotating gear ring 34; and a spring 354, which is installed inside the fixed base 351 and provides elastic support for the sliding block 352. The angle positioning mechanism 35 also includes: a sliding column. 355, one end of the sliding column 355 is fixedly connected to the sliding block 352, and the fixed base 351 has a slot that matches the sliding column 355; a rotating hanging ring 356 is rotatably connected to the fixed column above the sliding column 355, and the rotating hanging ring 356 is U-shaped. The sliding column 355 has an annular groove, and the rotating hanging ring 356 matches the inner cavity of the annular groove. One side of the one-way locking block 353 is inclined, so that when the one-way locking groove rotates clockwise and the inclined surface is squeezed, the one-way locking block 353 can be pushed out through the component force. The inner cavity of the one-way slot releases the one-way locking of the one-way locking block 353 onto the rotating gear ring 34. The fixed seat 351 facilitates the limiting of the sliding block 352's movement, restricting it to vertical sliding only. This also facilitates the storage of both the sliding block 352 and the one-way locking block 353. The compression deformation of the spring 354 provides elastic support for the sliding block 352, making the fit between the one-way locking block 353 and the one-way slot more stable. It also provides a restoring force to the sliding block 352, allowing it to move towards the rotating gear ring 34 when pushed out of the inner cavity of the one-way slot. The trend facilitates the one-way locking block 353 to continue cooperating with the next one-way locking slot as the rotating gear ring 34 rotates, which helps to better prevent the rotating gear ring 34 from reversing. When it is necessary to disassemble the relative position between the lead screw and the rotating bearing device 3, after the rotating hanging ring 356 is rotated to the horizontal, the sliding column 355 is pulled upward to rotate the rotating hanging ring 356 into the inside of the annular groove. By rotating the hanging ring 356 to support the sliding column 355, the one-way locking block 353 can be kept in the fixed seat 351, so as to keep the angle positioning mechanism 35 unlocked from the rotating gear ring 34.

[0066] The linear limiting device 4 includes: a mounting plate 41, which is bolted to a ball nut seat; a laser receiver 42, which is fixedly mounted on the top of the mounting plate 41 and corresponds to the position of the laser emitter 5; a guide rod 43, which is fixedly mounted on the inner side of the mounting base 1; a slide 44, which slides in cooperation with the guide rod 43; and a connecting plate 45, which is fixedly mounted on the top of the slide 44 and connected to the mounting plate 41 by bolts. The mounting plate 41 and the ball nut seat are connected so that the movement of the ball nut seat can simultaneously drive the movement of the laser receiver 42 for laser ranging. The sliding cooperation between the guide rod 43 and the slide 44 helps to limit the movement of the mounting plate 41, making the linear movement of the mounting plate 41 more stable. The cooperation between the connecting plate 45 and the mounting plate 41 facilitates the connection of the relative positions of the mounting plate 41 and the slide 44.

[0067] Another objective of this invention is to provide a measurement method for an automotive ball screw laser measuring device, comprising the following steps:

[0068] Step 1: First, connect one end of the ball screw to the main shaft using a coupling. Then, install the mounting plate 41 onto the ball nut seat using bolts. Next, connect the mounting plate 41 to the connecting plate 45 using bolts. Then, rotate the rotating gear ring 34 clockwise, causing the one-way groove on the rotating gear ring 34 to push the one-way locking block 353 upwards, thus unlocking the angle positioning mechanism 35 from engaging the rotating gear ring 34. Through the sliding fit between the guide slide and the guide cylinder 38, the threaded rod 31 is restricted from linear sliding. When the rotating ring 34 rotates, the rotation of the rotating nut seat 32 provides thrust to the linear motion of the threaded rod 31, which in turn drives the mounting cylinder 36 toward the ball screw. At this time, the other end of the ball screw squeezes the elastic clamp 37, which then compresses the ball screw after elastic deformation, thus bearing the rotation of the other end of the ball screw.

[0069] Step Two: Rotate the handle on the turntable 21. The inclined surface 2011 on the turntable 21 guides the relative position between the one-way alignment block 221 and the turntable 21. When the turntable 21 rotates counterclockwise, the one-way alignment block 221 is pushed out of the inner cavity of the alignment groove 201. Continue rotating the turntable 21 counterclockwise until the one-way alignment block 221 is aligned with the alignment groove 201 again. Due to its own weight, the one-way alignment block 221 falls back to its initial state of engagement with the inner cavity of the alignment groove 201. At this point, the turntable 21 has rotated one revolution. The rotating device 2 drives the ball screw to rotate synchronously. The rotation of the ball screw, in conjunction with the linear limiting device 4, linearly limits the movement of the ball nut seat, allowing the ball screw to advance the ball nut seat a certain distance linearly. Simultaneously, the mounting plate 41 drives the laser receiver 42 to move, thus changing the relative position between the laser emitter 5 and the laser receiver 42. This allows for the measurement of the ball nut seat's movement distance, enabling the calculation of the lead of one revolution of the ball screw. The laser emitter 5 and laser receiver 42 are separately arranged; as the ball screw rotates and moves the ball nut seat, their relative positions change, and the laser receiver 42 captures the change in the laser signal from the laser emitter 5. Compared to traditional contact measurement, this non-contact method avoids physical contact between the measuring tool and the screw, eliminating measurement errors caused by friction and wear, thereby significantly improving measurement accuracy and reliability. It meets the stringent requirements for high-precision measurement of ball screw lead in automotive manufacturing. The cooperation between the laser emitter 5 and laser receiver 42 allows for real-time monitoring of the ball nut seat's displacement. During the rotation of the lead screw, the laser receiver 42 can quickly sense the changes in the laser signal caused by the movement of the ball nut seat and convert the signal into data, realizing real-time acquisition of the ball nut seat displacement distance. This real-time capability ensures that the corresponding ball nut seat displacement data can be accurately obtained for each revolution of the lead screw, providing a reliable basis for accurate lead calculation.

[0070] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser measuring device for automotive ball screws, characterized in that, The utility model relates to a ball screw pitch detection device, including: Mounting seat (1), mounting seat (1) is provided with C character shape; Rotary device (2) is connected to one side of mounting seat (1), and rotary device (2) is used to provide power for the rotation of ball screw; Rotary bearing device (3) is inserted in the other side of mounting seat (1), and rotary bearing device (3) is used to bear the rotation of ball screw; Linear limiting device (4) is installed in the inner side of mounting seat (1), and linear limiting device (4) is used to guide the travel of ball nut seat; Laser emitter (5) is installed on mounting seat (1), and laser emitter (5) measures the moving distance of ball nut seat by emitting laser to realize the detection of ball screw pitch; Rotary device (2) includes: Main shaft is rotatably connected with mounting seat (1) through bearing, and one end of main shaft is connected with ball screw through coupling; Rotating disc (21) is connected to the other end of main shaft, and handle is installed on rotating disc (21); Rotary alignment mechanism (22) is installed on mounting seat (1), and rotary alignment mechanism (22) is used to align the rotation of rotating disc (21); Rotary alignment mechanism (22) includes: Fixed frame is fixedly installed on mounting seat (1); One-way alignment block (221) is located below fixed frame; Insertion rod (222) is fixedly connected with one-way alignment block (221), and insertion rod (222) is movably matched with fixed frame, and insertion rod (222) is T-shaped; Ball (223) is movably arranged in the inside of ball groove in the bottom of one-way alignment block (221); The outer side of rotating disc (21) is provided with alignment groove (201), one-way alignment block (221) and alignment groove (201) are matched with each other, alignment groove (201) includes inclined surface part (2011) and plane part (2012), plane part (2012) and the abutting surface of one-way alignment block (221) are in vertical state, and alignment magnet (202) is fixedly embedded in the abutting surface of plane part (2012) and one-way alignment block (221), and adjacent alignment magnet (202) is in the state that the opposite poles are opposite; Rotary bearing device (3) includes: Threaded rod (31) is movably connected with mounting seat (1); Rotary nut seat (32) is threadedly matched with threaded rod (31), and rotary nut seat (32) is arranged on the outer side of mounting seat (1); Fixed ring (33) is fixedly installed on the outer side of mounting seat (1), and fixed ring (33) is rotatably matched with rotary nut seat (32) through bearing. A rotating gear ring (34) is fixedly installed outside the rotating nut seat (32), and one-way clamping grooves are arranged in an annular array on the outer side of the rotating gear ring (34); An angle positioning mechanism (35) is installed on the fixed ring (33), and the angle positioning mechanism (35) is used for one-way limiting rotation of the rotating gear ring (34); A mounting cylinder (36) is fixedly connected to one end of the threaded rod (31), a moving plate is fixedly connected to the mounting cylinder (36), a guide slide is connected to the moving plate, and a cylinder is connected to the moving plate and rotationally matched with the mounting cylinder (36) through a bearing; A plurality of elastic clamping plates (37) are fixedly installed on the inner wall of the mounting cylinder (36) and arranged in an annular array, the cross section of each elastic clamping plate (37) is arranged in a V shape, and an anti-friction pad is connected to the surface of each elastic clamping plate (37); A guide cylinder (38) is fixedly installed on the mounting base (1), and a sliding groove is formed in the inner side of the guide cylinder (38); The angle positioning mechanism (35) comprises: A fixed seat (351) is fixedly installed on the fixed ring (33); A sliding block (352) is slidingly matched with the inside of the fixed seat (351); A one-way clamping block (353) is connected to the bottom of the sliding block (352) and integrally arranged between the sliding block (352) and the one-way clamping block (353), and the one-way clamping block (353) is matched with the one-way clamping groove on the rotating gear ring (34); A spring (354) is installed in the inside of the fixed seat (351), and the spring (354) is used for elastically supporting the sliding block (352); The linear limiting device (4) comprises: An installation plate (41) is installed on the ball nut seat through bolts; A laser receiver (42) is fixedly installed on the top of the installation plate (41), and the laser receiver (42) is located opposite to the laser emitter (5); The linear limiting device (4) further comprises: A guide rod (43) is fixedly installed on the inner side of the mounting base (1); A sliding seat (44) is slidingly matched with the guide rod (43); A connecting plate (45) is fixedly installed on the top of the sliding seat (44), and the connecting plate (45) is connected with the installation plate (41) through bolts.

2. The laser measuring device for a ball screw of a vehicle according to claim 1, wherein The angle positioning mechanism (35) further comprises: A slide column (355) is fixedly connected to one end of the sliding block (352), and a slot is formed in the fixed seat (351) and matched with the slide column (355). A rotating hanging ring (356) is arranged above the slide post (355), the fixed post is fixedly installed on the fixed seat (351), the rotating hanging ring (356) is rotationally connected with the fixed post, and the rotating hanging ring (356) is arranged in a U-shaped mode; an annular groove is formed in the slide post (355), and the rotating hanging ring (356) is matched with the inner cavity of the annular groove.

3. The measuring method of the laser measuring device for a ball screw of a vehicle according to any one of claims 1 to 2, characterized in that, The method comprises the following steps: Step one: firstly, the one end of the ball screw is connected with the main shaft through the shaft coupling, the mounting plate (41) is installed on the ball nut seat through the bolt, then the mounting plate (41) is connected with the connecting plate (45) through the bolt, the single-way clamping groove on the rotating gear ring (34) pushes the single-way clamping block (353) upwards to unlock the clamping of the angle positioning mechanism (35) on the rotating gear ring (34), the sliding cooperation between the guide sliding frame and the guide cylinder (38) limits the linear sliding of the threaded rod (31) and the rotation of the threaded rod (31), and the screw thread connection between the rotating nut seat (32) and the threaded rod (31) is matched, when the rotating gear ring (34) is rotated, the rotation of the rotating nut seat (32) can provide a thrust force for the linear movement of the threaded rod (31), so that the threaded rod (31) can drive the mounting cylinder (36) to move towards the ball screw, at this time, the other end of the ball screw extrudes the elastic clamping plate (37), so that the elastic clamping plate (37) is elastically deformed to press the ball screw, thereby achieving the bearing of the rotation of the other end of the ball screw; Step two: the handle on the rotating disc (21) is rotated, the relative position between the single-way positioning block (221) and the rotating disc (21) is guided through the inclined surface (2011) on the rotating disc (21), so that when the rotating disc (21) is counterclockwise rotated, the single-way positioning block (221) can be pushed out of the inner cavity of the positioning groove (201), the rotating disc (21) is continuously counterclockwise rotated until the single-way positioning block (221) again corresponds to the position of the positioning groove (201), the single-way positioning block (221) falls to the initial state matched with the inner cavity of the positioning groove (201) through the weight of the single-way positioning block (221), at this time, the rotating disc (21) rotates one circle, the rotating disc (21) is driven to rotate one circle through the rotating device (2), the linear position of the ball nut seat is limited through the linear limiting device (4), the rotation of the ball screw can linearly push the ball nut seat a distance, the movement of the laser receiver (42) is driven by the mounting plate (41), so that the relative position between the laser emitter (5) and the laser receiver (42) can be changed, the movement distance of the ball nut seat can be measured, and the lead of the ball screw rotating one circle can be calculated.

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