Super-long displacement driving system for automatic drilling of steel rail

Abstract

The invention provides a super-long displacement driving system for automatic drilling of a steel rail, which is used for realizing accurate control of processing of the super-long steel rail and comprises a lathe bed, a driving device and a driving device, the protective cover brackets are fixed at two ends of the bed body; the single gear and rack pair transmission mechanism comprises a sliding plate, a helical rack, a helical gear and a driving device which are slidably connected to the upper portion of the lathe bed, and the driving device is fixed to the sliding plate and is in transmission connection with the helical gear; the displacement detection mechanism is used for detecting displacement of the sliding plate in the length direction of the lathe bed; the locking mechanism is used for fixing the sliding plate and the lathe bed; the two ends of the two-way telescopic protective cover in the length direction are fixedly connected with the protective cover support and the sliding plate respectively; the displacement detection mechanism detects the displacement distance of the sliding plate in the length direction of the lathe bed and compares the displacement distance with the single-gear-rack pair transmission mechanism, and whether the gear-rack pair gap meets the design requirement or not can be judged. The bidirectional telescopic protective cover can protect the single-gear-rack pair transmission mechanism and the sliding guide mechanism, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of rail processing equipment, and in particular to an ultra-long displacement drive system for automatic rail drilling. Background Art

[0002] At present, the ultra-long displacement drive system of heavy equipment such as rail CNC drilling machines should not only realize the automatic control of the moving position and speed of functional components, but also have high (repetitive) positioning accuracy and dynamic response characteristics. If a conventional single-set gear rack transmission mechanism is used, there will inevitably be a reverse gap. When the ultra-long displacement drive system performs a reversing operation, the open-loop or semi-closed-loop servo system will cause a lag in reverse movement response, which will have a certain negative impact on the equipment's running stability and processing accuracy.

[0003] The existing ultra-long displacement drive system of heavy equipment such as rail CNC drilling machines usually adopts a dual-motor electrical anti-backlash gear rack transmission mechanism, which is composed of a double-group gear transmission mechanism (including servo motors, reducers and helical gears) and a single group of precision fixed-length racks. The double-group gear transmission mechanism is respectively in close contact with the two opposite tooth surfaces of the precision fixed-length rack to eliminate the tooth side clearance. At the same time, by revising the dual-motor torque transmission parameters of the CNC system, the double-group gear transmission mechanism can achieve the sequential output of the master and slave torques while maintaining the tension, thereby improving the (repeatable) positioning accuracy and dynamic response characteristics of the equipment, and is widely used in the ultra-long displacement (more than 6 meters) drive system of heavy equipment such as rail CNC drilling machines; and the production and manufacturing and use and maintenance costs of the equipment are bound to increase, so it is necessary to develop a simple, efficient and practical ultra-long displacement drive system. Summary of the invention

[0004] The present invention provides an ultra-long displacement drive system for automatic rail drilling to achieve precise control of ultra-long rail processing equipment and improve processing accuracy and efficiency. In order to achieve the above purpose, the technical solution adopted is as follows: An ultra-long displacement drive system for automatic rail drilling, comprising: Bed; The protective cover bracket is fixedly connected to both ends of the bed in the length direction; The single gear rack transmission mechanism is composed of a slide plate, a helical rack, a helical gear and a driving device. The slide plate is slidably connected to the top of the bed, the helical rack is fixedly connected to the top of the bed and distributed along the length direction of the bed, the driving device is fixedly connected to the slide plate and the output end is connected to the helical gear transmission, and the helical gear is meshed with the helical rack; A displacement detection mechanism is arranged between the bed and the slide plate, and is used to detect the displacement distance of the slide plate along the length direction of the bed; The locking mechanism is arranged between the bed and the slide plate, and is used to fix the relative position between the slide plate and the bed, and has two states: clamping and releasing; The two-way telescopic protective cover is slidably connected to the bed and the top of the protective cover bracket. The two ends of the two-way telescopic protective cover in the length direction are respectively detachably fixedly connected to one end of the protective cover bracket away from the bed and one end of the slide plate in the length direction.

[0005] Furthermore, the driving device includes a servo motor, a reducer, and a reducer mounting plate. The reducer is fixedly connected to the reducer mounting plate and its input end is transmission-connected to the output end of the servo motor. The output end of the reducer is transmission-connected to the helical gear. A combined disc spring clearance adjustment and pre-tightening mechanism is also connected between the reducer mounting plate and the slide plate, which is used to adjust the position of the reducer mounting plate in the width direction of the bed to drive the helical gear to approach the helical rack.

[0006] Furthermore, the slide plate is provided with an adjustment groove, and the reducer mounting plate is slidably connected in the adjustment groove along the width direction of the bed. The combined disc spring clearance adjustment preload mechanism includes an adjustment plate, a locking bolt, and a disc spring guide column. The adjustment plate is fixedly connected above the slide plate and is located on one side of the adjustment groove in the width direction of the bed. The locking bolt is threadedly connected to the adjustment plate and one end of the screw penetrates the adjustment plate and is tightened on the side end face of the reducer mounting plate. The axis of the disc spring guide column is distributed along the width direction of the bed, one end is threadedly connected to the adjustment plate, and the other end can be slidably connected to the groove on the side end face of the reducer mounting plate along the width direction of the bed. A disc spring is sleeved on the outside of the disc spring guide column, and the locking bolt and the disc spring guide column located between the adjustment plate and the reducer mounting plate are both threadedly connected with a locking nut.

[0007] Furthermore, a pressure plate is arranged above the adjustment groove, and the pressure plate includes a first pressure plate and a second pressure plate. The first pressure plate and the adjustment plate are arranged opposite to each other and are respectively located on both sides of the adjustment groove in the width direction of the bed. The second pressure plate is provided in two groups, and the two groups of second pressure plates are respectively located on both sides of the adjustment groove in the length direction of the bed, and the reducer mounting plate is slidably connected between the two groups of first pressure plates along the length direction of the bed.

[0008] Furthermore, the displacement detection device is a magnetic scale, the magnetic scale of which is distributed along the length direction of the bed and fixedly connected above the bed, and the reading head of the magnetic scale is fixedly connected to one end of the slide in the length direction.

[0009] Furthermore, the locking mechanism includes a clamping strip and a locking cylinder. The clamping strip is fixedly connected to the top of the bed and its length is distributed in a direction parallel to the length of the bed. The slide plate is provided with mounting slots extending vertically therethrough. The locking cylinder is provided with a clamp. The cylinder body of the locking cylinder is slidably connected to the slide plate through a floating guide mechanism, and the clamp extends out from under the mounting slot and cooperates with the clamping strip to clamp or release the clamp.

[0010] Furthermore, the slide plate is provided with a floating groove located on the outer side above the mounting groove, and a floating guide mechanism is provided between the cylinder body of the locking cylinder and the floating groove. The floating guide mechanism includes a guide plate and a spring seat. The guide plates are provided in two groups and are respectively located on both sides of the cylinder body of the locking cylinder. The cylinder body of the locking cylinder can be slidably connected between the two guide plates along the width direction of the bed. The spring seat is fixedly connected in the floating groove and is located on both sides of the cylinder body of the locking cylinder in the axial direction of the piston rod of the locking cylinder. A floating spring is sleeved on the outer side of the guide column of the spring seat, and the two ends of the floating spring are respectively connected to the base of the spring seat and the side wall of the cylinder body of the locking cylinder.

[0011] Furthermore, both ends of the bed in the length direction are provided with in-position detection devices for detecting the upper limit position of the slide in the length direction of the bed, the in-position detection device includes a three-contact switch and a bump block mounting plate, the three-contact switch is fixedly connected to one end of the slide in the length direction through a switch bracket, the bump block mounting plate includes a first bump block mounting plate and a second bump block mounting plate respectively arranged at the front and rear ends in the length direction of the bed, the first bump block mounting plate is provided with an origin bump block and a front end limit bump block, the second bump block mounting plate is provided with a rear end limit bump block, and the three contacts of the three-contact switch are distributed one-to-one with the positions of the origin bump block, the front end limit bump block and the rear end limit bump block in the width direction of the bed.

[0012] Furthermore, an anti-collision device is provided between the bed and the slide, and the anti-collision device includes an anti-collision seat, a buffer pad and a collision plate. The anti-collision seat is fixedly connected to both ends of the bed in the length direction, the buffer pad is fixedly connected to a side of the anti-collision seat close to the slide, and the collision plate is fixedly connected to both ends of the slide in the length direction and its position corresponds to the buffer pad.

[0013] Furthermore, the bed body is provided with a first protective cover guide rail and a slide plate guide rail distributed along the length direction of the bed body, the protective cover bracket is provided with a second protective cover guide rail distributed along the length direction, the second protective cover guide rail corresponds to the position of the first protective cover guide rail and is continuously distributed, the lower end of the bidirectional telescopic protective cover is provided with a slide groove that is slidably connected to the first protective cover guide rail and the second protective cover guide rail, the protective cover bracket is fixedly connected with the first protective cover connecting plate at one end away from the bed body, the slide plate is fixedly connected with the second protective cover connecting plate at both ends in the length direction, the bidirectional telescopic protective cover is fixedly connected with the first mounting plate and the second mounting plate at both ends in the length direction, the first mounting plate is detachably fixedly connected to the protective cover connecting plate, and the second mounting plate is detachably fixedly connected to the second protective cover connecting plate.

[0014] The beneficial effects of the present invention are: 1. The slide plate is driven to move along the length direction of the bed through the single gear rack transmission mechanism, and a two-way telescopic protective cover is arranged between the slide plate and the protective cover bracket, which can provide good protection for the single gear rack transmission mechanism, the slide plate and the guide mechanism between the bed and the protective cover bracket; 2. By combining the locking bolts in the disc spring clearance adjustment pre-tightening mechanism, the helical gear can be driven to approach the helical rack along the width direction of the bed, thereby adjusting the matching clearance between the gear and rack, and the disc spring guide column and disc spring can be used to apply a suitable pre-tightening force to the reducer mounting plate, which can eliminate the transmission clearance of the single gear rack transmission mechanism and ensure the dynamic response characteristics of the entire ultra-long displacement drive system; 3. A magnetic scale is set between the bed and the slide. By reading the coordinate distance of the slide moving along the length direction of the bed, the adverse effects caused by the pitch error and reverse clearance of the single-set gear rack transmission mechanism can be eliminated. When the displacement distance calculated based on the single gear rack transmission mechanism does not match the magnetic scale measurement, the position of the reducer mounting plate can be adjusted through the combined disc spring clearance pre-tightening mechanism based on the measurement results of the two. When the error is too large, the gear can be replaced to form a closed-loop control; 4. When the slide moves to the rail drilling position, the position between the slide and the bed can be fixed by the locking mechanism, which improves the stability of the overall structure and the processing accuracy during the processing; 5. A floating guide mechanism is arranged between the locking mechanism and the slide plate to ensure that the locking cylinder can slide a small amount along the joint surface of the guide plate in the relaxed state. The two jaws on the locking cylinder can be evenly separated by two sets of symmetrically arranged spring seats and floating springs to ensure that there is enough gap between the two jaws in the anti-loose state and the clamping surfaces corresponding to the clamping strip, so as to avoid interference between the two jaws and the clamping strip during the movement along the length direction of the bed; 6. By setting a three-contact switch, an origin bumper at the front end of the bed, a front limit bumper, and a rear limit bumper at the rear end of the bed, the starting origin position and the front and rear limit coordinate positions of the slide on the bed can be limited, so as to quickly locate the slide position to improve processing efficiency and control accuracy; 7. The anti-collision device composed of the anti-collision seat, buffer pad and collision plate can provide safe protection for the position of the skateboard, further improving the safety of the equipment; 8. This device can always maintain the gap-free meshing of the single gear rack and bar transmission mechanism when there are pitch and reverse errors in the single gear rack and bar transmission mechanism, and can automatically compensate for the corresponding gap when slight wear occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the three-dimensional structure of the present invention Figure 2 The structural diagram of the split bed in the present invention is Figure 3 for Figure 2 A partial enlarged diagram of point C in the middle Figure 4 A three-dimensional schematic diagram of a single gear rack transmission mechanism Figure 5 for Figure 4 Bottom structure diagram Figure 6 Top view of a single gear rack transmission mechanism Figure 7 for Figure 6 AA section view and BB section view in Figure 8 A three-dimensional schematic diagram of the protective cover bracket, bed, and slide plate connection structure Fig. 9 for Figure 8 A partial enlarged diagram of point E in the middle Fig.10 for Figure 1 A partial enlarged diagram of point B in the middle Fig.11 for Figure 1 A partial enlarged schematic diagram Fig.12 A three-dimensional cross-sectional view of the connection between the locking mechanism and the slide plate Fig.13 Sectional view of the connection between the locking mechanism and the slide plate in: 1-bed, 101-first split bed, 102-second split bed, 103-first protective cover guide rail, 104-slide plate guide rail, 105-slide plate guide rail mounting groove, 106-clamping strip, 107-rack mounting plate, 108-rack mounting surface, 109-magnetic scale mounting surface, 1010-anti-collision seat mounting hole, 1011-collision block mounting hole, 1012-bed connecting plate; 2-bidirectional telescopic protective cover, 201-first mounting plate, 202-second mounting plate; 3-protective cover bracket, 301-second protective cover guide rail, 302-first protective cover connecting plate, 4-Single gear rack transmission mechanism, 5-slide plate, 501-second protective cover connecting plate, 502-impact plate, 503-magnetic scale reading head mounting bracket, 504-contact switch mounting bracket, 505-guide rail slider, 506-floating slot, 507-mounting slot, 508-adjustment slot; 6-bevel rack, 7-bevel gear, 8-reducer mounting plate, 801-groove, 9-servo motor, 10-reducer, 11-first pressure plate, 12-second pressure plate, 13-adjusting plate, 14-disc spring guide column, 15-disc spring, 16-first locking nut, 17-locking bolt, 18-second locking nut, 19-locking cylinder, 1901-piston rod, 1902-fixed clamp body, 1903-movable clamp body, 20-guide plate, 21-spring seat, 22-floating spring, 23-anti-collision seat, 24-buffer pad, 25-reading head, 26-magnetic scale, 27-three-contact switch, 28-first impact block mounting plate, 29-origin impact block, 30-front end limit impact block, 31-second impact block mounting plate, 32-rear end limit impact block. DETAILED DESCRIPTION

[0016] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0017] In the description of the invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the viewing direction or positional relationships and are only for the convenience of describing the invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0018] In this embodiment, for the convenience of description, the length direction of the bed, that is, the processing sequence direction, is taken as the front-to-back direction, and the width direction of the bed is taken as the left-to-right direction.

[0019] like Figure 1 The shown system is an ultra-long displacement drive system for automatic drilling of rails, comprising a bed 1, two sets of protective cover brackets 3 fixedly connected to the two ends of the bed in the length direction, a single gear rack pair transmission mechanism 4 connected to the top of the bed for forward and backward sliding, and a bidirectional telescopic protective cover 2 connected between the single gear rack pair transmission mechanism 4 and the protective cover bracket 3.

[0020] Specifically, Figure 1-Figure 3As shown, in this embodiment, the bed 1 includes a first split bed 101 and a second split bed 102, the ends of which are detachably fixedly connected by a bed connecting plate 1012, and the first split bed 101 and the second split bed 102 are both provided with first protective cover guide rails 103 at both ends in the width direction, and the upper end surface of the first protective cover guide rail 103 is provided with a slide rail mounting groove 105, and a slide rail mounting groove 105 is fixedly connected with a slide rail having a length distributed along the length direction of the bed 1. Rail 104, a clamping strip 106 and a rack mounting plate 107 are fixedly connected in the middle of the width direction of the upper end surface of the first protective cover guide rail 103, and the lengths of the first protective cover guide rail 103, the slide plate guide rail mounting groove 105, the clamping strip 106, and the rack mounting plate 107 are distributed along the length direction of their respective split bed frames. Of course, multiple groups of split bed frames can be set up and connected in sequence according to the actual processing environment to further increase the displacement length of the single gear rack pair transmission mechanism 4 to adapt to the drilling processing operation of longer rails.

[0021] Single gear rack transmission mechanism 4 Figure 4-Figure 7As shown, it includes a slide plate 5, a bevel rack 6, a bevel gear 7, a servo motor 9, and a reducer 10. The left and right sides of the lower end of the slide plate 5 are fixedly connected with guide rail sliders 505. The slide plate 5 is slidably connected to the upper part of the slide rail 104 through the guide rail sliders 505. A rack mounting plate 107 is fixedly connected to the middle of the upper end surface of the bed 1. The length of the rack mounting plate 107 is distributed along the length direction of the bed 1, and a rack mounting surface 108 is arranged on the rack mounting plate 107. The bevel rack 6 is fixedly connected to the rack mounting surface 108 and its length is distributed along the length direction of the bed 1. An adjustment groove 508 is arranged at the rear position of the upper end surface of the slide plate 5. The reducer mounting plate 8 is arranged in the adjustment groove 508. The reducer 10 is fixedly connected The reducer mounting plate 8 is on the reducer mounting plate 8 and the output shaft extends downward to the bottom of the reducer mounting plate 8 and is coaxially fixedly connected to the bevel gear 7. The output end of the servo motor 9 is transmission-connected to the input end of the reducer 10. In addition, the reducer mounting plate 8 can be slidably connected to the adjustment groove 508 along the left and right directions, that is, the width direction of the bed 1. The first pressing plate 11 is fixedly connected to the upper left end of the adjustment groove 508, and the second pressing plate 12 is detachably fixedly connected to the upper front and rear ends by bolts. The lower end surfaces of the first pressing plate 11 and the second pressing plate 12 are in contact with the upper end surface of the reducer mounting plate 8 and an appropriate gap is reserved. The reducer mounting plate 8 is limited and fixed in the upper and lower directions by the first pressing plate 11 and the second pressing plate 12; the adjusting groove 50 A group of adjustment plates 13 are also fixedly connected above the right end of 8, the first pressure plate 11 and the adjustment plate 13 are relatively arranged on the left and right sides of the adjustment groove 508, the length of the adjustment plate 13 is distributed along the front-to-back direction, and a combined disc spring gap adjustment pre-tightening mechanism is arranged between the adjustment plate 13 and the reducer mounting plate 8; the combined disc spring gap adjustment pre-tightening mechanism includes a disc spring guide column 14, a disc spring 15, a first locking nut 16, a locking bolt 17 and a second locking nut 18, the disc spring guide column 14 passes through the adjustment plate 13 from right to left and then extends into the groove 801 arranged on the right side surface of the reducer mounting plate 8, the disc spring guide column 14 is threadedly connected to the adjustment plate 13, and the gap between the left end of the disc spring guide column 14 and the groove 801 is matched The disc spring guide column 14 can slide left and right along the groove 801, the disc spring 15 is sleeved on the left end of the disc spring guide column 14 and one end in the length direction is in contact with the right side surface of the reducer mounting plate 8, and the other end is connected to the shoulder of the disc spring guide column 14. The first locking nut 16 is threadedly connected to the threaded section of the disc spring guide column 14, and is used to fix the disc spring guide column 14 and the adjustment plate 13. The locking bolt 17 is threadedly connected to the adjustment plate 13. The locking bolt 17 passes through the adjustment plate 13 from right to left and is tightened on the right side surface of the reducer mounting plate 8. The second locking nut 18 is threadedly connected to the locking bolt 17 and is located between the adjustment plate 13 and the reducer mounting plate 8, and is used to fix the locking bolt 17 and the adjustment plate 13.

[0022] The locking bolt 17 can be used to push the reducer mounting plate 8 to move left along the width direction of the bed 1, thereby preliminarily adjusting the matching clearance between the bevel gear 7 and the bevel rack 6. When the locking bolt 17 is adjusted, the second locking nut 18 fixes the position of the locking bolt 17; then, by adjusting the length of the disc spring guide column 14 extending into the groove 801, the length of the disc spring 15 can be adjusted to adjust the preload force of the reducer mounting plate 8, thereby eliminating the transmission clearance of the single gear rack transmission mechanism and ensuring the dynamic response characteristics of the entire ultra-long displacement drive system.

[0023] Two-way telescopic protective cover 2 Figure 1 As shown, in the present embodiment, two groups are provided, and the two groups of two-way telescopic protective covers 2 are respectively connected between the two ends of the slide plate 5 and the two protective cover brackets 3. The two-way telescopic protective cover 2 is composed of a multi-layer stainless steel plate, which can be telescopic in both directions in the length direction. The two-way telescopic protective cover 2 is respectively provided with a slide groove at the left and right ends in the width direction, and is slidably connected with the first protective cover guide rail 103 at the left and right ends of the bed 1 and the second protective cover guide rail 301 at the left and right ends of the protective cover bracket 3 through the slide groove, and the first mounting plate 201 and the second mounting plate 202 are respectively fixedly connected at the two ends in the length direction of the two-way telescopic protective cover 2, and the first mounting plate 201 and the protective cover bracket 3 are respectively fixedly connected. The first protective cover connecting plate 302 on the frame 3 is provided with mounting holes distributed in corresponding positions, and the two are detachably fixedly connected by screws. The second mounting plate 202 and the second protective cover connecting plate 501 at the end of the slide plate 5 are provided with mounting holes distributed in corresponding positions, and the two are also detachably fixedly connected by screws. It should be noted that, in the normal working state of the present device, the first mounting plate 201 is fixedly connected to the first protective cover connecting plate 302, and the second mounting plate 202 is fixedly connected to the second protective cover connecting plate 501. Through the setting of the bidirectional telescopic protective cover 2, the single gear rack pair transmission mechanism 4 and the guide mechanism can be well protected.

[0024] like Figure 1 , Figure 3 , Figure 8 , Fig. 9 As shown, a displacement detection mechanism is also provided between the slide plate 5 and the bed 1 for detecting the displacement distance of the slide plate 5 along the length direction of the bed 1. Specifically, the displacement detection mechanism includes a magnetic scale, such as Figure 3 As shown, a magnetic scale mounting surface 109 is also provided on the rack mounting plate 107 located above the bed 1. The magnetic scale 26 of the magnetic scale is fixedly connected to the magnetic scale mounting surface 109, and its length is distributed along the length direction parallel to the oblique rack 6, as shown in FIG. Fig. 9As shown, a magnetic scale reading head mounting bracket 503 is detachably fixedly connected to the middle part of the second protective cover connecting plate 501 at the front end of the slide plate 5, and the magnetic scale reading head 25 is fixedly connected to the slide plate 5 through the magnetic scale reading head mounting bracket 503, and the positions of the reading head 25 and the magnetic scale 26 are correspondingly distributed. The displacement of the slide plate 5 along the length direction of the bed 1 can be detected by the magnetic scale, and the coordinate distance of the slide plate 5 moving forward and backward can be read by the magnetic scale. When the displacement distance measured by the magnetic scale does not match the single gear rack pair transmission mechanism 4, the position of the reducer mounting plate 8 in the adjustment groove 508 can be adjusted by the locking bolt 17 to keep the helical gear 7 and the helical rack 6 within a reasonable meshing clearance. When the difference is too large, it indicates that the gear is seriously worn, and it can be considered to stop the machine and replace the gear, thereby eliminating the adverse effects of the single gear rack pair transmission mechanism 4 caused by pitch error and reverse clearance, so as to improve the accuracy of the control of the entire ultra-long displacement drive system.

[0025] like Figure 1 , Figure 3 , Fig. 9 , Fig.10 As shown, a position detection device is also provided between the slide plate 5 and the bed 1, which is used to detect the initial origin position and the front and rear end limit coordinate positions of the slide plate 5; specifically, the position detection device includes a three-contact switch 27, a first collision block mounting plate 28, and a second collision block mounting plate 31, as shown in FIG. Fig. 9As shown, a contact switch mounting bracket 504 is detachably fixedly connected to the right side of the front end surface of the slide plate 5 by screws, and the three-contact switch 27 is fixedly connected to the contact switch mounting bracket 504, and the three switch contacts of the three-contact switch 27 are distributed along the width direction of the bed 1; the first collision block mounting plate 28 is fixedly connected to the front end position of the first split bed 101, and the second collision block mounting plate 31 is fixedly connected to the rear end position of the second split bed 102, and a collision block mounting hole 1011 is provided on the right side of the front end of the upper end of the first split bed 101, and the first collision block mounting plate 28 is detachably fixedly connected to the collision block mounting hole 1011 by screws to complete the fixation with the first split bed 101, and the origin collision block 29 and the front end limit are fixedly connected to the first collision block mounting plate 28 from left to right in sequence. The rear end limit bumper 30 is fixedly connected to the second split bed 102 by screws, and the rear end limit bumper 32 is fixedly connected to the second bumper mounting plate 31, and the rear end limit bumper 32 is located on the right side of the front end limit bumper 30 in the width direction of the bed 1, and the origin bumper 29, the front end limit bumper 30, and the rear end limit bumper 32 correspond to the three groups of contact switches on the three-contact switch 27 respectively. When the slide plate 5 slides along the bed 1, the three-contact switch 27 contacts with the origin bumper 29, the front end limit bumper 30, and the rear end limit bumper 32 respectively, so as to limit the starting origin position and the front and rear end limit coordinate positions of the slide plate 5 on the bed 1.

[0026] It should be noted that when the number of split bed frames is greater than two groups, the first collision block mounting plate 28 and the second collision block mounting plate 31 are respectively installed at the front and rear end positions of the bed frame 1, and no collision block mounting plate and collision block are set on the split bed frame in the middle position.

[0027] like Figure 3 , Fig. 9 As shown, an anti-collision device is also provided between the bed 1 and the slide plate 5, and the anti-collision device includes an anti-collision seat 23, a buffer pad 24 and a collision plate 502. In this embodiment, the anti-collision seat 23 is fixedly connected to the two ends of the bed 1 in the length direction, as shown in FIG. Figure 3 As shown, an anti-collision seat mounting hole 1010 is provided at the left position of the front end of the upper end surface of the first split bed 101, and the anti-collision seat 23 is detachably fixedly connected to the anti-collision seat mounting hole 1010 by screws. Similarly, an anti-collision seat 23 is symmetrically provided on the left side of the rear end of the upper end surface of the second split bed 102 (not shown in the figure), and a buffer pad 24 is fixedly connected to a side surface of the anti-collision seat 23 close to the slide plate 5. The buffer pad 24 is made of a material with a certain elasticity and plays a certain buffering role; as shown Fig. 9As shown, the impact plate 502 is fixedly connected to the left side of the ends of the skateboard 5 in the length direction, and the impact plate 502 corresponds to the position of the buffer pad 24. By setting the anti-collision device, it can be avoided that the skateboard 5 slides out of the front and rear end limit positions due to control failure.

[0028] like Figure 1 , Figure 3 , Fig. 9 , Fig.11 , Fig.12 as well as Fig.13 As shown, a locking mechanism is also provided between the slide plate 5 and the bed 1 for fixing the position of the slide plate 5 in the length direction of the bed 1; specifically, the locking mechanism includes a locking cylinder 19 and a clamping strip 106, as shown in FIG. Figure 3 and Fig. 9 As shown, the upper end surfaces of the first split bed 101 and the second split bed 102 are fixedly connected with a clamping strip 106, the length of which is distributed along the length direction of the bed 1; Fig.11 As shown, the slide plate 5 is provided with a mounting groove 507 extending through the plate thickness direction, and the cylinder body of the locking oil cylinder 19 slides in the mounting groove 507 through a floating guide mechanism; the piston rod axis of the locking oil cylinder 19 is distributed along the width direction of the bed 1, and the lower end of the locking oil cylinder 19 is connected with a clamp; the clamp comprises a fixed clamp body 1902 and a movable clamp body 1903 which are spaced apart along the width direction of the bed 1, the fixed clamp body 1902 is fixedly connected to the cylinder body of the locking oil cylinder 19, and the movable clamp body 1903 is fixedly connected to the movable end of the piston rod 1901 of the locking oil cylinder 19, and the locking oil cylinder 19 can drive the movable clamp body 1903 to approach or move away from the fixed clamp body 1902 along the width direction of the bed 1 through the piston rod 1901 when the locking oil cylinder 19 is actuated, thereby achieving the clamping or loosening of the clamping strip 106, and in the clamped state, the slide plate 5 is locked with the clamping strip 106 of the bed 1, and the slide plate 5 cannot slide along the bed 1, and in the loosened state, the slide plate 5 can slide along the length direction of the bed 1.

[0029] In addition, a floating guide mechanism is provided between the slide plate 5 and the locking oil cylinder 19, and the floating guide mechanism includes a guide plate 20, a spring seat 21, and a floating spring 22. A floating groove 506 located outside the mounting groove 507 is provided on the upper end surface of the slide plate 5. The guide plate 20 is located in the floating groove 506 and is provided with two groups. The two groups of guide plates 20 are respectively fixedly connected to the front and rear ends of the upper end surface of the mounting groove 507, and the locking oil cylinder 19 can be slidably connected between the two groups of guide plates 20 along the width direction of the bed 1. A group of spring seats are respectively provided between the left and right side walls of the floating groove 506 and the cylinder body of the locking oil cylinder 19. 21. One end of the base of the spring seat 21 is detachably fixedly connected to the floating groove 506 of the slide plate 5 by screws. The floating spring 22 is sleeved on the outside of the guide column of the spring seat 21 and the two ends are respectively connected between the cylinder body of the locking cylinder 19 and the spring seat 21. Through the setting of the floating guide mechanism, the fixed clamp body 1902 and the movable clamp body 1903 can be evenly separated in the left and right directions of the clamping strip 106 to ensure that there is enough gap between the left and right clamping surfaces of the two clamp bodies and the clamping strip 106 corresponding to the two clamp bodies in the relaxed state, so as to avoid interference between the two clamp bodies and the clamping strip 106 when the slide plate 5 moves along the length direction of the bed 1.

[0030] The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention. These improvements should also be regarded as the protection scope of the present invention.

Claims

1. An ultra-long displacement drive system for automatic rail drilling, characterized in that: include: Bed; The protective cover bracket is fixedly connected to both ends of the bed in the length direction; The single gear rack transmission mechanism is composed of a slide plate, a helical rack, a helical gear and a driving device. The slide plate is slidably connected to the top of the bed, the helical rack is fixedly connected to the top of the bed and distributed along the length direction of the bed, the driving device is fixedly connected to the slide plate and the output end is connected to the helical gear transmission, and the helical gear is meshed with the helical rack; A displacement detection mechanism is arranged between the bed and the slide plate, and is used to detect the displacement distance of the slide plate along the length direction of the bed; The locking mechanism is arranged between the bed and the slide plate, and is used to fix the relative position between the slide plate and the bed, and has two states: clamping and releasing; The two-way telescopic protective cover is slidably connected to the bed and the top of the protective cover bracket. The two ends of the two-way telescopic protective cover in the length direction are respectively detachably fixedly connected to one end of the protective cover bracket away from the bed and one end of the slide plate in the length direction.

2. The ultra-long displacement drive system for automatic rail drilling according to claim 1 is characterized in that: The driving device includes a servo motor, a reducer, and a reducer mounting plate. The reducer is fixedly connected to the reducer mounting plate and its input end is transmission-connected to the output end of the servo motor. The output end of the reducer is transmission-connected to the helical gear. A combined disc spring clearance adjustment and pre-tightening mechanism is also connected between the reducer mounting plate and the slide plate, which is used to adjust the position of the reducer mounting plate in the width direction of the bed to drive the helical gear to approach the helical rack.

3. The ultra-long displacement drive system for automatic rail drilling according to claim 2, characterized in that: The slide plate is provided with an adjustment groove, and the reducer mounting plate is slidably connected in the adjustment groove along the width direction of the bed. The combined disc spring clearance adjustment pre-tightening mechanism includes an adjustment plate, a locking bolt, and a disc spring guide column. The adjustment plate is fixedly connected above the slide plate and is located on one side of the adjustment groove in the width direction of the bed. The locking bolt is threadedly connected to the adjustment plate and one end of the screw penetrates the adjustment plate and is tightened on the side end face of the reducer mounting plate. The axis of the disc spring guide column is distributed along the width direction of the bed, one end is threadedly connected to the adjustment plate, and the other end can be slidably connected to the groove on the side end face of the reducer mounting plate along the width direction of the bed. A disc spring is sleeved on the outside of the disc spring guide column, and the locking bolt and the disc spring guide column located between the adjustment plate and the reducer mounting plate are both threadedly connected with a locking nut.

4. The ultra-long displacement drive system for automatic rail drilling according to claim 3 is characterized in that: A pressure plate is also arranged above the adjustment groove, and the pressure plate includes a first pressure plate and a second pressure plate. The first pressure plate and the adjustment plate are arranged opposite to each other and are respectively located on both sides of the adjustment groove in the width direction of the bed. Two groups of second pressure plates are arranged, and the two groups of second pressure plates are respectively located on both sides of the adjustment groove in the length direction of the bed, and the reducer mounting plate is slidably connected between the two groups of second pressure plates along the length direction of the bed.

5. The ultra-long displacement drive system for automatic rail drilling according to claim 1, characterized in that: The displacement detection device is a magnetic scale, the magnetic scale of which is distributed along the length direction of the bed and fixedly connected above the bed, and the reading head of the magnetic scale is fixedly connected to one end of the slide in the length direction.

6. The ultra-long displacement drive system for automatic rail drilling according to claim 1, characterized in that: The locking mechanism includes a clamping strip and a locking cylinder. The clamping strip is fixedly connected above the bed and its length is distributed in a direction parallel to the length of the bed. The slide plate is provided with mounting slots that penetrate the slide plate from top to bottom. The locking cylinder is provided with a clamp. The cylinder body of the locking cylinder is slidably connected to the slide plate through a floating guide mechanism, and the clamp extends out from below the mounting slot and cooperates with the clamping strip to clamp or release the clamp.

7. The ultra-long displacement drive system for automatic rail drilling according to claim 6, characterized in that: The slide plate is provided with a floating groove located on the outer side above the mounting groove, and a floating guide mechanism is provided between the cylinder body of the locking oil cylinder and the floating groove. The floating guide mechanism includes a guide plate and a spring seat. The guide plates are provided in two groups and are respectively located on both sides of the cylinder body of the locking oil cylinder. The cylinder body of the locking oil cylinder can be slidably connected between the two guide plates along the width direction of the bed. The spring seat is fixedly connected in the floating groove and is located on both sides of the cylinder body of the locking oil cylinder in the axial direction of the piston rod of the locking oil cylinder. A floating spring is sleeved on the outer side of the guide column of the spring seat, and the two ends of the floating spring are respectively connected to the base of the spring seat and the side wall of the cylinder body of the locking oil cylinder.

8. The ultra-long displacement drive system for automatic rail drilling according to claim 1, characterized in that: Both ends of the bed in the length direction are provided with in-position detection devices for detecting the upper limit position of the slide in the length direction of the bed, the in-position detection device includes a three-contact switch and a bump block mounting plate, the three-contact switch is fixedly connected to one end of the slide in the length direction through a switch bracket, the bump block mounting plate includes a first bump block mounting plate and a second bump block mounting plate respectively arranged at the front and rear ends in the length direction of the bed, the first bump block mounting plate is provided with an origin bump block and a front end limit bump block, the second bump block mounting plate is provided with a rear end limit bump block, and the three contacts of the three-contact switch are distributed one-to-one with the positions of the origin bump block, the front end limit bump block and the rear end limit bump block in the width direction of the bed.

9. The ultra-long displacement drive system for automatic rail drilling according to claim 1, characterized in that: An anti-collision device is also arranged between the bed and the slide, and the anti-collision device includes an anti-collision seat, a buffer pad and a collision plate. The anti-collision seat is fixedly connected to both ends of the bed in the length direction, the buffer pad is fixedly connected to a side of the anti-collision seat close to the slide, and the collision plate is fixedly connected to both ends of the slide in the length direction and its position corresponds to the buffer pad.

10. The ultra-long displacement drive system for automatic drilling of rails according to claim 1, wherein the bed is provided with a first protective cover rail and a slide plate rail distributed along the length direction of the bed, and the protective cover bracket is provided with a second protective cover rail distributed along the length direction, the second protective cover rail corresponds to the position of the first protective cover rail and is continuously distributed, the lower end of the bidirectional telescopic protective cover is provided with a slide groove that is slidably connected to the first protective cover rail and the second protective cover rail, the end of the protective cover bracket away from the bed is fixedly connected with the first protective cover connecting plate, the two ends of the slide plate in the length direction are fixedly connected with the second protective cover connecting plate, the two ends of the bidirectional telescopic protective cover in the length direction are fixedly connected with the first mounting plate and the second mounting plate, the first mounting plate is detachably fixedly connected to the protective cover connecting plate, and the second mounting plate is detachably fixedly connected to the second protective cover connecting plate.

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