A linear guide rail straightness monitoring device and system

Abstract

The present invention relates to the technical field related to linear guide rails, and specifically to a linear guide rail straightness monitoring device and system. The linear guide rail straightness monitoring device comprises a laser emitting module, a light guiding hole and a laser receiving module. The laser emitting module is fixedly mounted on a emitting module mounting seat, the light guiding hole is arranged on a guide rail slide, the laser receiving module is fixedly mounted on a receiving module mounting seat, the emitting module mounting seat and the receiving module mounting seat are both fixedly mounted on the linear guide rail, and the linear guide rail is fixedly mounted on a machine tool body through a connecting seat; the laser emitted by the laser emitting module passes through the light guiding hole, and is received by the laser receiving module. When the guide rail slide and the linear guide rail are offset in position, the amount of laser light passing through the light guiding hole will change, which will cause the laser intensity received by the laser receiving module to change, thereby realizing real-time monitoring of the relative positions of the guide rail slide and the linear guide rail, thereby achieving the purpose of monitoring the straightness of the guide rail.

Description

Technical Field

[0001] The present invention relates to the technical field of linear guides, and particularly to a linearity monitoring device and system for a linear guide. Background Technique

[0002] A guide rail is a groove or ridge made of metal or other materials, which can bear, fix, guide a moving device or equipment and reduce its friction. The longitudinal grooves or ridges on the surface of the guide rail are used to guide and fix machine components, special equipment, instruments, etc. The guide rail is also called a slide rail, a linear guide rail, a linear slide rail, and is used in occasions of linear reciprocating motion. It has a higher rated load than a linear bearing, and can also bear a certain torque, and can achieve high-precision linear motion under high load;

[0003] However, wear and deformation will occur to the linear guide rail during actual use. After the linear guide rail is worn and deformed, it will affect the machining accuracy of the workpiece by the machine tool, thereby reducing the quality of the products processed by the machine tool. For this reason, the present invention proposes a linearity monitoring device and system for a linear guide rail to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a linearity monitoring device and system for a linear guide rail to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A linearity monitoring device for a linear guide rail, the linearity monitoring device for the linear guide rail includes:

[0006] A laser emission module, which is fixedly installed on a emission module mounting seat;

[0007] A light guiding hole, which is opened on a guide rail slider;

[0008] A laser receiving module, which is fixedly installed on a receiving module mounting seat, and the emission module mounting seat and the receiving module mounting seat are both fixedly installed on the linear guide rail;

[0009] The linear guide rail is fixedly installed on a machine tool body through a connecting seat, and the laser emission module, the light guiding hole, and the laser receiving module are arranged on the same straight line.

[0010] Preferably, a primary concave lens is fixedly mounted on the front side of the light-guiding hole, and a secondary concave lens is fixedly mounted on the rear side of the light-guiding hole. The central parts of the primary and secondary concave lenses are plane mirrors, and the diameters of the plane mirrors at the central parts of the primary and secondary concave lenses match the diameters of the lasers emitted by the laser emitting module. When the laser emitting module and the guide rail slide are actually installed, the laser emitted by the laser emitting module just passes through the central plane parts of the primary and secondary concave lenses.

[0011] Preferably, a light absorbing tube is provided on the side wall of the light guiding hole, and the light absorbing tube is made of light absorbing material.

[0012] Preferably, a light absorption trap is provided on the inner side wall of the light absorption tube, and the light absorption trap does not completely penetrate the side wall of the light absorption tube. Multiple groups of light absorption traps are provided on the inner side wall of the light absorption tube, and the side wall of the light absorption trap is a non-smooth surface.

[0013] Preferably, the linear guide rail is composed of a guide rail base and a guide rail body, the guide rail base and the connecting seat are integrally formed, the guide rail body is fixedly mounted on the guide rail base, the guide rail slide is composed of a main seat body and a slide seat body, the slide seat body is fixedly mounted on the lower side of the main seat body, and the slide seat body is movably mounted on the guide rail body, and the transmitting module mounting seat and the receiving module mounting seat are both fixedly connected to the guide rail base.

[0014] Preferably, belt grooves are formed on both sides of the guide rail base, and a primary pulley and a secondary pulley are respectively provided on the front and rear sides of the guide rail base, the primary pulley is rotatably mounted on the machine tool body via a primary rotating shaft, and the secondary pulley is rotatably mounted on the adjustment seat via a secondary rotating shaft, and the adjustment seat is adjustably mounted on the guide rail base, the primary pulley and the secondary pulley are connected by a transmission belt, and the transmission belt is arranged to pass through the belt groove on the guide rail base, and a connecting seat is integrally formed on the lower side of the main seat body, and the end of the connecting seat is fixedly glued to the outer side of the transmission belt.

[0015] Preferably, the machine body is fixedly connected with an air duct via an air duct bracket, and the front and rear ends of the inner cavity of the air duct are respectively installed with a primary sealed bearing and a secondary sealed bearing, a third-stage rotating shaft is rotatably installed between the primary sealed bearing and the secondary sealed bearing, an exhaust fan blade is fixedly installed in the middle of the third-stage rotating shaft, and a primary bevel gear is connected to the rear side end of the third-stage rotating shaft, a secondary bevel gear is fixedly connected to the primary rotating shaft, and the secondary bevel gear is meshed with the primary bevel gear, and an air inlet duct and an exhaust duct are connected to the side wall of the air duct, and the air inlet duct and the exhaust duct are respectively located on both sides of the exhaust fan blade, and a dust filter is connected to the port position of the air inlet duct.

[0016] Preferably, a first-stage pipe and a second-stage pipe are fixedly connected to the side walls of the emission module mount and the reception module mount respectively. The inner ends of the first-stage pipe and the second-stage pipe are both sealed, and the outer ends of the first-stage pipe and the second-stage pipe are both connected to the exhaust pipe through an air delivery pipe. Straight pipes and inclined pipes are communicated with the side walls of the first-stage pipe and the second-stage pipe. The straight pipes on the first-stage pipe and the second-stage pipe are respectively arranged opposite to the laser emission module and the laser reception module. When the guide rail slider reciprocates, the outer sides of the first-stage concave lens and the second-stage concave lens will respectively pass through the air outlets of the inclined pipes on the first-stage pipe and the second-stage pipe.

[0017] Preferably, a connecting pipe is integrally formed at the front end of the first-stage bevel gear. The connecting pipe is rotatably connected to the third-stage rotating shaft through a ball bearing, and the rotation direction between the connecting pipe and the third-stage rotating shaft is restricted by a ratchet assembly.

[0018] A linear guide straightness monitoring system is used to control the above-mentioned linear guide straightness monitoring device. The laser emission module and the laser reception module are both electrically connected to the PLC control module in the straightness monitoring system.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. By providing a linear guide straightness monitoring device composed of a laser emission module, a light guiding hole, and a laser reception module, the laser emitted by the laser emission module passes through the light guiding hole, and the laser is received by the laser reception module. When the position of the guide rail slider deviates from the linear guide, the amount of laser passing through the light guiding hole will change, resulting in a change in the laser intensity received by the laser reception module, thereby realizing real-time monitoring of the relative position of the guide rail slider and the linear guide, and achieving the purpose of monitoring the straightness of the guide rail;

[0021] 2. By respectively arranging a first-stage concave lens and a second-stage concave lens in front of and behind the light guiding hole, when the laser emitted by the laser emission module does not pass through the central positions of the first-stage concave lens and the second-stage concave lens, the laser beam will be refracted, thereby amplifying the deviation amount and effectively improving the monitoring accuracy of the linear guide straightness monitoring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the present invention;

[0023] Figure 2 is Figure 1 an enlarged schematic view of the structure at A in

[0024] Figure 3 is Figure 1 an enlarged schematic view of the structure at B in

[0025] Figure 4 This is a half-sectional view of the present invention;

[0026] Figure 5 is Figure 4 an enlarged schematic view of the structure at position C in

[0027] Figure 6 is Figure 5 an enlarged schematic view of the structure at position F in

[0028] Figure 7 is Figure 4 an enlarged schematic view of the structure at position D in

[0029] Figure 8 is Figure 4 an enlarged schematic view of the structure at position E in

[0030] Figure 9 This is a schematic view of the linear guide rail structure of the present invention;

[0031] Figure 10 is Figure 9 an enlarged schematic view of the structure at position F in

[0032] Figure 11 This is a schematic view of the guide rail slider structure of the present invention.

[0033] In the figure: laser emission module 1, light guiding hole 2, laser receiving module 3, emission module mounting seat 4, receiving module mounting seat 5, linear guide rail 6, guide rail slider 7, connecting seat 8, machine tool body 9, first-level concave lens 10, second-level concave lens 11, light absorption tube 12, light absorption trap 13, guide rail base 14, guide rail body 15, main seat body 16, slider body 17, first-level rotating shaft 18, first-level pulley 19, second-level rotating shaft 20, transmission belt 21, connecting seat 22, air duct support 23, air duct 24, air inlet duct 25, air exhaust duct 26, first-level sealed bearing 27, second-level sealed bearing 28, third-level rotating shaft 29, exhaust fan blade 30, first-level bevel gear 31, second-level bevel gear 32, first-level pipe 33, second-level pipe 34, straight pipe 35, inclined pipe 36, connecting pipe 37, ball bearing 38, ratchet assembly 39, belt groove 40, adjusting seat 41. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Please refer to Figures 1-11, the present invention provides embodiments of the following three preferred solutions:

[0036] Embodiment 1

[0037] Please refer to Figures 1-4 , a straightness monitoring device for a linear guide rail. The straightness monitoring device for the linear guide rail includes a laser emission module 1, a light guiding hole 2, and a laser receiving module 3. The laser emission module 1 is fixedly installed on the emission module mounting seat 4. The light guiding hole 2 is opened on the guide rail slider 7. The laser receiving module 3 is fixedly installed on the receiving module mounting seat 5. Both the emission module mounting seat 4 and the receiving module mounting seat 5 are fixedly installed on the linear guide rail 6. The linear guide rail 6 is fixedly installed on the machine tool body 9 through a connecting seat 8. The laser emission module 1, the light guiding hole 2, and the laser receiving module 3 are arranged on the same straight line. By setting the straightness monitoring device for the linear guide rail composed of the laser emission module 1, the light guiding hole 2, and the laser receiving module 3, the laser emitted by the laser emission module 1 passes through the light guiding hole 2, and the laser is received by the laser receiving module 3. When the position of the guide rail slider 7 and the linear guide rail 6 is offset, it will cause a change in the amount of laser passing through the light guiding hole 2, which will lead to a change in the laser intensity received by the laser receiving module 3, thereby realizing real-time monitoring of the relative positions of the guide rail slider 7 and the linear guide rail 6, and thus achieving the purpose of monitoring the straightness of the guide rail.

[0038] Embodiment 2

[0039] Please refer to Figures 7-8 , on the basis of Embodiment 1, a first-level concave lens 10 is fixedly installed at the front end of the light guiding hole 2, and a second-level concave lens 11 is fixedly installed at the rear end of the light guiding hole 2. The central parts of the first-level concave lens 10 and the second-level concave lens 11 are plane mirrors, and the diameter values of the plane mirrors at the central parts of the first-level concave lens 10 and the second-level concave lens 11 are consistent with the diameter value of the laser emitted by the laser emission module 1. When the laser emission module 1 and the guide rail slider 7 are actually installed, the laser emitted by the laser emission module 1 just passes through the central plane parts of the first-level concave lens 10 and the second-level concave lens 11. By respectively arranging the first-level concave lens 10 and the second-level concave lens 11 at the front and rear sides of the light guiding hole 2, when the laser emitted by the laser emission module 1 does not pass through the central positions of the first-level concave lens 10 and the second-level concave lens 11, it will cause the laser beam to form refraction, thereby amplifying the offset amount, and effectively improving the monitoring accuracy of the straightness monitoring device for the guide rail.

[0040] An absorbing tube 12 is provided on the side wall of the light guiding hole 2. The absorbing tube 12 is made of an absorbing material. An absorbing trap 13 is formed on the inner side wall of the absorbing tube 12. The absorbing trap 13 does not completely penetrate the side wall of the absorbing tube 12. Multiple groups of absorbing traps 13 are formed on the inner side wall of the absorbing tube 12, and the side wall of the absorbing trap 13 is a non-smooth surface, which avoids the reflection of the laser refracted on the side wall of the light guiding hole 2, thereby further improving the monitoring accuracy.

[0041] Embodiment III

[0042] Please refer to Figures 1-6 and Figures 9-11 Based on Embodiment II, the linear guide rail 6 is composed of a guide rail base 14 and a guide rail body 15. The guide rail base 14 is integrally formed with the connecting seat 8. The guide rail body 15 is fixedly installed on the guide rail base 14. The guide rail slider 7 is composed of a main seat body 16 and a slider body 17. The slider body 17 is fixedly installed on the lower side of the main seat body 16, and the slider body 17 is movably installed on the guide rail body 15. The emission module mounting seat 4 and the receiving module mounting seat 5 are both fixedly connected to the guide rail base 14. Belt grooves 40 are formed on both sides of the guide rail base 14. A first-stage belt pulley 19 and a second-stage belt pulley are respectively arranged on the front and rear sides of the guide rail base 14. The first-stage belt pulley 19 is rotatably installed on the machine body 9 through a first-stage rotating shaft 18. The second-stage belt pulley is rotatably installed on the adjusting seat 41 through a second-stage rotating shaft 20. The adjusting seat 41 is adjustably installed on the guide rail base 14. The first-stage belt pulley 19 and the second-stage belt pulley are connected by a transmission belt 21 for transmission connection. The transmission belt 21 is arranged through the belt groove 40 on the guide rail base 14. A connecting seat 22 is integrally formed on the lower side of the main seat body 16. The end of the connecting seat 22 is fixedly glued to the outer side of the transmission belt 21. An air duct 24 is fixedly connected to the machine body 9 through an air duct bracket 23. A first-stage sealing bearing 27 and a second-stage sealing bearing 28 are respectively installed at the front and rear ends of the inner cavity of the air duct 24. A third-stage rotating shaft 29 is rotatably installed between the first-stage sealing bearing 27 and the second-stage sealing bearing 28. An exhaust fan blade 30 is fixedly installed at the middle position of the third-stage rotating shaft 29, and a first-stage bevel gear 31 is connected to the rear side end of the third-stage rotating shaft 29. A second-stage bevel gear 32 is fixedly connected to the first-stage rotating shaft 18. The second-stage bevel gear 32 is meshed with the first-stage bevel gear 31. An air inlet duct 25 and an air outlet duct 26 are communicated with the side wall of the air duct 24. The air inlet duct 25 and the air outlet duct 26 are respectively located on both sides of the exhaust fan blade 30. A dust filter is connected to the port position of the air inlet duct 25.

[0043] On the side walls of the emission module mounting base 4 and the reception module mounting base 5, a primary pipeline 33 and a secondary pipeline 34 are respectively fixedly connected. The inner ends of the primary pipeline 33 and the secondary pipeline 34 are both sealed, and the outer ends of the primary pipeline 33 and the secondary pipeline 34 are both connected to the exhaust pipeline 26 through air delivery pipes. Straight pipes 35 and inclined pipes 36 are communicated with the side walls of the primary pipeline 33 and the secondary pipeline 34. The straight pipes 35 on the primary pipeline 33 and the secondary pipeline 34 are respectively arranged opposite to the laser emission module 1 and the laser reception module 3. When the guide rail slider 7 reciprocates, the outer sides of the primary concave lens 10 and the secondary concave lens 11 respectively pass through the air outlets of the inclined pipes 36 on the primary pipeline 33 and the secondary pipeline 34. The guide rail slider 7 drives the transmission belt 21 to move back and forth along the linear guide rail 6, thereby driving the primary belt pulley 19, thereby driving the primary rotating shaft 18, and driving the tertiary rotating shaft 29 and the exhaust fan blade 30 through the transmission of the secondary bevel gear 32 and the primary bevel gear 31, so as to form an air flow blown out from the straight pipes 35 and the inclined pipes 36 on the primary pipeline 33 and the secondary pipeline 34, so as to self-clean the surfaces of the laser emission module 1, the laser reception module 3, the primary concave lens 10 and the secondary concave lens 11, so as to ensure the cleanliness of their surfaces, so as to avoid the accumulation of dust generated by the operation of the machine tool equipment and affect the monitoring accuracy.

[0044] A connecting pipe 37 is integrally formed at the front end of the primary bevel gear 31. The connecting pipe 37 and the tertiary rotating shaft 29 are rotationally connected through a ball bearing 38, and the rotation direction between the connecting pipe 37 and the tertiary rotating shaft 29 is restricted by a ratchet assembly 39 to ensure that the exhaust fan blade 30 can only rotate in one direction, so as to ensure the blowing direction of the air flow.

[0045] A linear guide rail straightness monitoring system is used to control the above-mentioned linear guide rail straightness monitoring device. The laser emission module 1 and the laser reception module 3 are both electrically connected to the PLC control module in the straightness monitoring system.

[0046] Although the illustrative specific embodiments of the present application are described above to enable those skilled in the art to understand the present application, the present application is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the appended claims, all application creations using the concept of the present application are within the scope of protection.

Claims

1. A linear guide rail straightness monitoring device, characterized in that: The linear guide rail straightness monitoring device comprises: A laser emission module (1), wherein the laser emission module (1) is fixedly mounted on a emission module mounting seat (4); A light guiding hole (2), wherein the light guiding hole (2) is formed on the guide rail slide seat (7); A laser receiving module (3), wherein the laser receiving module (3) is fixedly mounted on a receiving module mounting seat (5), and the transmitting module mounting seat (4) and the receiving module mounting seat (5) are both fixedly mounted on a linear guide rail (6); The linear guide rail (6) is fixedly mounted on the machine tool body (9) via a connecting seat (8); the laser emitting module (1), the light guide hole (2), and the laser receiving module (3) are arranged on the same straight line; A primary concave lens (10) is fixedly mounted on the front side of the light guide hole (2), and a secondary concave lens (11) is fixedly mounted on the rear side of the light guide hole (2); the central parts of the primary concave lens (10) and the secondary concave lens (11) are plane mirrors, and the diameters of the plane mirrors at the central parts of the primary concave lens (10) and the secondary concave lens (11) match the diameters of the lasers emitted by the laser emission module (1); and when the laser emission module (1) and the guide rail slide seat (7) are actually installed, the lasers emitted by the laser emission module (1) just pass through the central plane parts of the primary concave lens (10) and the secondary concave lens (11); A light absorbing tube (12) is provided on the side wall of the light guiding hole (2), and the light absorbing tube (12) is made of a light absorbing material; A light absorption trap (13) is provided on the inner side wall of the light absorption tube (12); the light absorption trap (13) does not completely penetrate the side wall of the light absorption tube (12); a plurality of light absorption traps (13) are provided on the inner side wall of the light absorption tube (12); and the side wall of the light absorption trap (13) is a non-smooth surface.

2. A linear guide rail straightness monitoring device according to claim 1, characterized in that: The linear guide rail (6) is composed of a guide rail base (14) and a guide rail body (15), the guide rail base (14) and the connecting seat (8) are integrally formed, the guide rail body (15) is fixedly mounted on the guide rail base (14), the guide rail slide seat (7) is composed of a main seat body (16) and a slide seat body (17), the slide seat body (17) is fixedly mounted on the lower side of the main seat body (16), and the slide seat body (17) is movably mounted on the guide rail body (15), and the transmitting module mounting seat (4) and the receiving module mounting seat (5) are both fixedly connected to the guide rail base (14).

3. A linear guide rail straightness monitoring device according to claim 2, characterized in that: Belt grooves (40) are formed on both sides of the guide rail base (14), and a primary pulley (19) and a secondary pulley are respectively provided on the front and rear sides of the guide rail base (14). The primary pulley (19) is rotatably mounted on the machine tool body (9) via a primary rotating shaft (18), and the secondary pulley is rotatably mounted on an adjustment seat (41) via a secondary rotating shaft (20). The adjustment seat (41) is adjustably mounted on the guide rail base (14), and the primary pulley (19) and the secondary pulley are connected to each other through a transmission belt (21). The transmission belt (21) is arranged to pass through the belt groove (40) on the guide rail base (14). A connecting seat (22) is integrally formed on the lower side of the main seat body (16), and an end of the connecting seat (22) is fixedly glued to the outer side of the transmission belt (21).

4. A linear guide rail straightness monitoring device according to claim 3, characterized in that: The machine tool body (9) is fixedly connected to an air duct (24) via an air duct bracket (23); a primary sealing bearing (27) and a secondary sealing bearing (28) are respectively installed at the front and rear ends of the inner cavity of the air duct (24); a third-stage rotating shaft (29) is rotatably installed between the primary sealing bearing (27) and the secondary sealing bearing (28); an exhaust fan blade (30) is fixedly installed at the middle position of the third-stage rotating shaft (29); and a primary bevel gear (31) is connected to the rear side end of the third-stage rotating shaft (29); a secondary bevel gear (32) is fixedly connected to the primary rotating shaft (18); the secondary bevel gear (32) is meshed with the primary bevel gear (31); an air inlet duct (25) and an exhaust duct (26) are connected to the side wall of the air duct (24); the air inlet duct (25) and the exhaust duct (26) are respectively located on both sides of the exhaust fan blade (30); and a dust filter is connected to the port position of the air inlet duct (25).

5. A linear guide rail straightness monitoring device according to claim 4, characterized in that: A primary pipe (33) and a secondary pipe (34) are fixedly connected to the side walls of the transmitting module mounting seat (4) and the receiving module mounting seat (5), respectively; the inner ends of the primary pipe (33) and the secondary pipe (34) are both sealed, and the outer ends of the primary pipe (33) and the secondary pipe (34) are both connected to the exhaust pipe (26) through the air supply pipe; the side walls of the primary pipe (33) and the secondary pipe (34) are both connected with a straight pipe (35) and an inclined pipe (36); the straight pipe (35) on the primary pipe (33) and the secondary pipe (34) are respectively arranged opposite to the laser transmitting module (1) and the laser receiving module (3); when the guide rail slide seat (7) reciprocates, the outer side surfaces of the primary concave lens (10) and the secondary concave lens (11) pass through the air outlets of the inclined pipe (36) on the primary pipe (33) and the secondary pipe (34), respectively.

6. A linear guide rail straightness monitoring device according to claim 5, characterized in that: A connecting tube (37) is integrally formed at the front side end of the primary bevel gear (31); the connecting tube (37) is rotationally connected to the tertiary rotating shaft (29) via a ball bearing (38); and the connecting tube (37) and the tertiary rotating shaft (29) are restricted in their steering direction via a ratchet assembly (39).

7. A linear guide rail straightness monitoring system, characterized in that: The linear guide straightness monitoring system is used to control any one of the linear guide straightness monitoring devices of claims 1 to 6, and the laser emitting module (1) and the laser receiving module (3) are both electrically connected to the PLC control module in the straightness monitoring system.

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