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

Abstract

The utility model 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 utility model relates to rail processing equipment technical field, especially in a kind of for steel rail automatic drilling's super-long displacement drive system. BACKGROUND

[0002] At present, the super-long displacement drive system of heavy equipment such as rail numerical control drilling machine, in addition to realizing the automatic control of the moving position and speed of functional components, should also have high (repeat) positioning accuracy and dynamic response characteristics. If the conventional single gear rack pair transmission mechanism is used, there will be reverse clearance. When the super-long displacement drive system performs reversing operation, it will cause the problem of reverse movement response lag for open-loop or semi-closed-loop servo system, which will have a certain negative impact on equipment running stability and machining precision.

[0003] The super-long displacement drive system of existing heavy equipment such as rail numerical control drilling machine usually adopts double-motor electrical clearance-eliminating gear rack pair transmission mechanism. The transmission mechanism is composed of double sets of gear transmission mechanism (including servo motor, speed reducer and helical gear) and single set of precision fixed-length rack. The double sets of gear transmission mechanism are in close contact with the two opposite tooth surfaces of the precision fixed-length rack to eliminate the backlash, and the double-motor torque transmission parameters of the numerical control system are revised to realize the sequential output of master-slave torque of the double sets of gear transmission mechanism in the state of maintaining tension, so as to improve the (repeat) positioning accuracy and dynamic response characteristics of the equipment, and the super-long displacement (more than 6 meters) drive system of heavy equipment such as rail numerical control drilling machine is widely used. However, the production and maintenance cost of the equipment is bound to increase, so it is necessary to develop a simple, efficient and practical super-long displacement drive system. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of for steel rail automatic drilling's super-long displacement drive system to realize the accurate control of super-long rail processing equipment, improve processing precision and processing efficiency, to realize the above-mentioned purpose, the technical scheme as follows is adopted:

[0005] A kind of for steel rail automatic drilling's super-long displacement drive system, comprising:

[0006] bed body;

[0007] protective cover support, fixedly connected to the length direction both ends of bed body;

[0008] Single gear rack pair transmission mechanism, composed of slide, helical rack, helical gear and driving device, the slide is slidably connected to the top of bed body, the helical rack is fixedly connected to the top of bed body and is distributed along the length direction of bed body, the driving device is fixedly connected with slide and the output end is connected with helical gear transmission, and helical gear is engaged with helical rack;

[0009] A displacement detection mechanism is arranged between the bed body and the slide plate to detect the displacement distance of the slide plate along the length direction of the bed body.

[0010] A locking mechanism is arranged between the bed body and the slide plate to fix the relative position between the slide plate and the bed body, and has two states of clamping and loosening.

[0011] A bidirectional telescopic protective cover is slidably connected above the bed body and the protective cover support, and the two ends of the length direction of the bidirectional telescopic protective cover are respectively detachably fixedly connected with one end of the protective cover support away from the bed body and one end of the length direction of the slide plate.

[0012] Further, the driving device comprises a servo motor, a speed reducer, and a speed reducer mounting plate, the speed reducer is fixedly connected to the speed reducer mounting plate and the input end is in transmission connection with the output end of the servo motor, the output end of the speed reducer is in transmission connection with the helical gear, and a combined disc spring gap adjusting and pre-tightening mechanism is further connected between the speed reducer mounting plate and the slide plate to adjust the position of the speed reducer mounting plate in the width direction of the bed body to drive the helical gear to approach the helical rack.

[0013] Further, an adjusting groove is arranged on the slide plate, the speed reducer mounting plate is slidably connected in the adjusting groove in the width direction of the bed body, and the combined disc spring gap adjusting and pre-tightening mechanism comprises an adjusting plate, a locking bolt, and a disc spring guide column, the adjusting plate is fixedly connected above the slide plate and located on one side of the adjusting groove in the width direction of the bed body, the locking bolt is threadedly connected to the adjusting plate and the screw rod penetrates through the adjusting plate and is tightly pressed on the side end face of the speed reducer mounting plate, the axis of the disc spring guide column is distributed in the width direction of the bed body, one end is threadedly connected to the adjusting plate, and the other end is slidably connected to the groove on the side end face of the speed reducer mounting plate in the width direction of the bed body, a disc spring is sleeved outside the disc spring guide column, and the locking bolt and the disc spring guide column between the adjusting plate and the speed reducer mounting plate are both threadedly connected with a locking nut.

[0014] Further, a pressing plate is further arranged above the adjusting groove, the pressing plate comprises a first pressing plate and a second pressing plate, the first pressing plate and the adjusting plate are oppositely arranged and respectively located on the two sides of the adjusting groove in the width direction of the bed body, and two groups of second pressing plates are arranged, the two groups of second pressing plates are respectively located on the two sides of the adjusting groove in the length direction of the bed body, and the speed reducer mounting plate is slidably connected between the two groups of first pressing plates in the length direction of the bed body.

[0015] Further, the displacement detection mechanism is a magnetic scale, the magnetic scale is distributed in the length direction of the bed body and fixedly connected above the bed body, and the reading head of the magnetic scale is fixedly connected to one end of the length direction of the slide plate.

[0016] Further, the locking mechanism comprises a clamping strip and a locking oil cylinder, the clamping strip is fixedly connected to the upper part of the bed body and has a length along the parallel direction of the bed body length, the slide plate is provided with an installation slot hole distributed in the upper and lower directions, the locking oil cylinder is provided with a clamping clamp, the cylinder body of the locking oil cylinder is slidably connected to the slide plate through a floating guide mechanism, and the clamping clamp extends below the installation slot hole and cooperates with the clamping strip to clamp or release the clamping strip.

[0017] Further, the slide plate is provided with a floating groove located above the installation groove on the outer side, a floating guide mechanism is arranged between the cylinder body of the locking oil cylinder and the floating groove, the floating guide mechanism comprises a guide plate and a spring seat, the guide plate is provided with two groups and is located on both sides of the cylinder body of the locking oil cylinder, the cylinder body of the locking oil cylinder is slidably connected between the two guide plates in the width direction of the bed body, the spring seat is fixedly connected in the floating groove and located on both sides of the cylinder body of the locking oil cylinder in the direction of the piston rod axis of the locking oil cylinder, a floating spring is sleeved outside the guide column of the spring seat, and the two ends of the floating spring are connected with the base of the spring seat and the side wall of the cylinder body of the locking oil cylinder respectively.

[0018] Further, the two ends of the bed body length direction are provided with a to-position detection device for detecting the limit position of the slide plate in the length direction of the bed body, the to-position detection device comprises a three-contact switch and a striker mounting plate, the three-contact switch is fixedly connected to one end of the slide plate in the length direction through a switch support, the striker mounting plate comprises a first striker mounting plate and a second striker mounting plate respectively arranged at the front and rear ends of the bed body in the length direction, the first striker mounting plate is provided with an origin striker and a front end limit striker, the second striker mounting plate is provided with a rear end limit striker, and the three contacts of the three-contact switch are distributed one by one in position with the origin striker, the front end limit striker and the rear end limit striker in the width direction of the bed body.

[0019] Further, the bed body and the slide plate are further provided with an anti-collision device, the anti-collision device comprises an anti-collision seat, a buffer pad and a striker plate, the anti-collision seat is fixedly connected to the two ends of the bed body in the length direction, the buffer pad is fixedly connected to the side surface of the anti-collision seat close to the slide plate, and the striker plate is fixedly connected to the two ends of the slide plate in the length direction and corresponds to the buffer pad in position.

[0020] Further, the bed body is provided with first protective cover guide rails and slide plate guide rails distributed along the length direction of the bed body, the protective cover support is provided with second protective cover guide rails distributed along the length direction, the second protective cover guide rails are continuously distributed and correspond to the first protective cover guide rails in position, the lower end of the two-way telescopic protective cover is provided with a sliding groove connected with the first protective cover guide rails and the second protective cover guide rails in sliding mode, the end of the protective cover support away from the bed body is fixedly connected with a first protective cover connecting plate, the two ends of the slide plate in the length direction are fixedly connected with second protective cover connecting plates, the two ends of the two-way telescopic protective cover in the length direction are fixedly connected with first mounting plates and second mounting plates, the first mounting plates are detachably fixedly connected with the protective cover connecting plates, and the second mounting plates are detachably fixedly connected with the second protective cover connecting plates.

[0021] The bed body has the advantages that:

[0022] 1. The single gear and rack transmission mechanism drives the slide plate to move along the length direction of the bed body, and the two-way telescopic protective cover is arranged between the slide plate and the protective cover support, which can protect the single gear and rack transmission mechanism, the guide mechanism between the slide plate, the bed body and the protective cover support;

[0023] 2. The locking bolt in the combined disc spring gap adjusting and pre-tightening mechanism drives the bevel gear to approach the bevel gear rack along the width direction of the bed body, so as to adjust the matching gap between the gear and the gear rack, and the disc spring guide column and the disc spring can exert appropriate pre-tightening force on the speed reducer mounting plate, so that the transmission gap of the single gear and rack transmission mechanism can be eliminated, and the dynamic response characteristics of the whole ultra-long displacement driving system can be ensured;

[0024] 3. The magnetic scale is arranged between the bed body and the slide plate, the coordinate distance of the slide plate moving along the length direction of the bed body can be read, the adverse effects caused by the tooth spacing error and the reverse gap of the single gear and rack transmission mechanism can be eliminated, when the displacement distance calculated according to the single gear and rack transmission mechanism does not match the measurement of the magnetic scale, the position of the speed reducer mounting plate can be adjusted according to the measurement results of the two through the combined disc spring gap adjusting and pre-tightening mechanism, and when the error is too large, the gear can be replaced, so that a closed-loop control is formed;

[0025] 4. When the slide plate moves to the steel rail drilling position, the position between the slide plate and the bed body can be fixed through the locking mechanism, so that the stability and machining precision of the whole structure in the machining process are improved;

[0026] 5. The floating guide mechanism is arranged between the locking mechanism and the slide plate, so that the locking oil cylinder can slide a small amount along the guide plate joint surface in the relaxed state, the two jaws on the locking oil cylinder can be evenly separated through the symmetrically arranged two spring seats and floating springs, and enough gap is left between the clamping surfaces corresponding to the two jaws and the clamping strips in the anti-loose state, so that the two jaws do not interfere with the clamping strips during movement along the length direction of the bed body.

[0027] 6. By setting three-contact switch, the original point block at the front end of the bed body, the front end limiting block, the rear end limiting block at the rear end of the bed body, the starting original point position of the slide plate moving on the bed body can be limited, the front and rear end limiting coordinate positions are limited, so that the position of the slide plate is quickly positioned, the machining efficiency and the control precision are improved;

[0028] 7. The anti-collision device composed of the anti-collision seat, the buffer pad and the impact plate can protect the position of the slide plate, and the safety of the equipment is further improved;

[0029] 8. The device can always keep the gapless meshing of the single gear and rack transmission mechanism even if the pitch and reverse error exist in the single gear and rack transmission mechanism, and the corresponding gap can be automatically compensated when slight wear occurs. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a three-dimensional structure schematic view of the utility model

[0031] Figure 2 It is a structure schematic view of the split type bed body in the utility model

[0032] Figure 3 It is Figure 2 It is a local enlarged schematic view of C in the utility model

[0033] Figure 4 It is a three-dimensional schematic view of the single gear and rack transmission mechanism

[0034] Figure 5 It is Figure 4 It is a bottom structure schematic view of the utility model

[0035] Figure 6 It is a plan view of the single gear and rack transmission mechanism

[0036] Figure 7 It is Figure 6 It is the A-A section view and B-B section view schematic view in the utility model

[0037] Figure 8 It is a three-dimensional schematic view of the protective cover support, the bed body and the slide plate connecting structure

[0038] Figure 9 It is Figure 8 It is a local enlarged schematic view of E in the utility model

[0039] Figure 10 It is Figure 1 It is a local enlarged schematic view of B in the utility model

[0040] Figure 11 It is Figure 1 It is a local enlarged schematic view of A in the utility model

[0041] Figure 12 A perspective view of the locking mechanism and the slide plate connection

[0042] Figure 13 A cross-sectional view of the locking mechanism and the slide plate connection

[0043] Wherein:

[0044] 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 slot, 106-clamping strip, 107-rack mounting plate, 108-rack mounting surface, 109-magnetic ruler mounting surface, 1010-anti-collision seat mounting hole, 1011-collision block mounting hole, 1012-bed connecting plate;

[0045] 2-two-way telescopic protective cover, 201-first mounting plate, 202-second mounting plate;

[0046] 3-protective cover support, 301-second protective cover guide rail, 302-first protective cover connecting plate,

[0047] 4-single gear rack pair transmission mechanism,

[0048] 5-slide plate, 501-second protective cover connecting plate, 502-collision plate, 503-magnetic grating ruler reading head mounting support, 504-contact switch mounting support, 505-guide rail slider, 506-floating groove, 507-mounting groove, 508-adjusting groove;

[0049] 6-helical rack, 7-helical gear, 8-reducer mounting plate, 801-groove, 9-servo motor, 10-reducer, 11-first pressing plate, 12-second pressing plate, 13-adjusting plate, 14-disk spring guide column, 15-disk spring, 16-first locking nut, 17-locking bolt, 18-second locking nut, 19-locking oil cylinder, 1901-piston rod, 1902-fixed jaw body, 1903-movable jaw body, 20-guide plate, 21-spring seat, 22-floating spring, 23-anti-collision seat, 24-cushion pad, 25-reading head, 26-magnetic ruler, 27-three-contact switch, 28-first collision block mounting plate, 29-origin collision block, 30-front end limit collision block, 31-second collision block mounting plate, 32-rear end limit collision block. DETAILED DESCRIPTION

[0050] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood, and the scope of the present disclosure can be accurately conveyed to those skilled in the art.

[0051] In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the view direction or positional relationship, and are only for the convenience of describing the utility model, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model.

[0052] In this embodiment, for ease of description, the length direction of the bed, i.e. 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.

[0053] like Figure 1 The ultra-long displacement drive system for automatic drilling of rails shown includes a bed 1, two sets of protective cover brackets 3 fixedly connected to both ends of the bed in the length direction, a single gear rack transmission mechanism 4 slidably connected to the bed, and a bidirectional telescopic protective cover 2 connected between the single gear rack transmission mechanism 4 and the protective cover brackets 3.

[0054] Specifically, such as Figures 1-3 As shown, in this embodiment, the bed 1 includes a first split bed 101 and a second split bed 102, which are detachably and fixedly connected at their ends by a bed connecting plate 1012. Both the first split bed 101 and the second split bed 102 are provided with first protective cover guide rails 103 at their left and right ends in the width direction. The upper surface of the first protective cover guide rail 103 is provided with a sliding plate guide rail mounting groove 105, and a sliding plate guide rail with a length distributed along the length direction of the bed 1 is fixedly connected within the sliding plate guide rail mounting groove 105. The first protective cover guide rail 103 has a clamping bar 106 and a rack mounting plate 107 fixedly connected to the middle of its upper surface in the width direction. The lengths of the first protective cover guide rail 103, the slide rail mounting groove 105, the clamping bar 106, and the rack mounting plate 107 are all distributed along the length direction of their respective split beds. Of course, multiple split beds can be connected in sequence according to the actual processing environment to further increase the displacement length of the single gear rack transmission mechanism 4 and adapt to the drilling operation of longer rails.

[0055] Single gear rack transmission mechanism 4 Figures 4-7As shown, including slide plate 5, bevel gear rack 6, bevel gear 7, servo motor 9, speed reducer 10, the lower end of slide plate 5 is fixedly connected with guide rail sliding block 505 on both sides, slide plate 5 is slidably connected above slide plate guide rail 104 through guide rail sliding block 505, the upper end surface of bed body 1 is fixedly connected with rack mounting plate 107 in the middle, the length of rack mounting plate 107 is distributed along the length direction of bed body 1, and rack mounting surface 108 is arranged on rack mounting plate 107, bevel gear rack 6 is fixedly connected to rack mounting surface 108 and the length is distributed along the length direction of bed body 1, the rear position of the upper end surface of slide plate 5 is provided with adjusting groove 508, speed reducer mounting plate 8 is arranged in adjusting groove 508, speed reducer 10 is fixedly connected to speed reducer mounting plate 8 and the output shaft extends downward to be coaxially fixedly connected with bevel gear 7 below speed reducer mounting plate 8, the output end of servo motor 9 is drivingly connected with the input end of speed reducer 10, in addition, speed reducer mounting plate 8 can be slidably connected in adjusting groove 508 along the left-right direction, i.e. the width direction of bed body 1, the upper left end of adjusting groove 508 is fixedly connected with first pressing plate 11, the upper ends of the front and rear ends are detachably fixedly connected with second pressing plate 12 through bolts, the lower end surfaces of first pressing plate 11 and second pressing plate 12 are in contact with the upper end surface of speed reducer mounting plate 8 and a proper gap is reserved, first pressing plate 11 and second pressing plate 12 are used for limiting and fixing speed reducer mounting plate 8 in the up-down direction; a group of adjusting plates 13 are further fixedly connected to the upper right end of adjusting groove 508, first pressing plate 11 and adjusting plate 13 are oppositely arranged on the left and right sides of adjusting groove 508, adjusting plate 13 is distributed along the front and rear direction, and a combined disc spring gap adjusting and pre-tightening mechanism is arranged between adjusting plate 13 and speed reducer mounting plate 8; the combined disc spring gap adjusting and pre-tightening mechanism comprises disc spring guide column 14, disc spring 15, first locking nut 16, locking bolt 17 and second locking nut 18, disc spring guide column 14 extends into recess 801 on the right side surface of speed reducer mounting plate 8 after penetrating through adjusting plate 13 from right to left, disc spring guide column 14 is threadedly connected with adjusting plate 13, disc spring guide column 14 is gap-fitted between the left end and recess 801, disc spring guide column 14 can slide left and right along recess 801, disc spring 15 is sleeved on the left end of disc spring guide column 14 and is in contact with the right side surface of speed reducer mounting plate 8 at one end in the length direction, and is connected with the shaft shoulder of disc spring guide column 14 at the other end, first locking nut 16 is threadedly connected at the threaded section of disc spring guide column 14, used for fixing disc spring guide column 14 and adjusting plate 13, locking bolt 17 is threadedly connected with adjusting plate 13, locking bolt 17 is tightly pressed on the right side surface of speed reducer mounting plate 8 after penetrating through adjusting plate 13 from right to left, second locking nut 18 is threadedly connected with locking bolt 17 and is located between adjusting plate 13 and speed reducer mounting plate 8, used for fixing locking bolt 17 and adjusting plate 13.

[0056] The gearbox mounting plate 8 can be moved to the left along the width of the bed 1 by tightening the locking bolt 17, thereby initially adjusting the fit clearance between the helical gear 7 and the helical rack 6. After 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 post 14 extending into the groove 801, the length of the disc spring 15 can be adjusted to adjust the preload of the gearbox mounting plate 8, while eliminating the transmission clearance of the single gear rack transmission mechanism, ensuring the dynamic response characteristics of the entire ultra-long displacement drive system.

[0057] Two-way telescopic protective cover 2 Figure 1 As shown, in this embodiment, two sets of bidirectional telescopic protective covers 2 are provided, which are respectively connected between the two ends of the slide plate 5 and the two protective cover supports 3. The bidirectional telescopic protective covers 2 are composed of multiple layers of stainless steel plates and can be extended and retracted in both directions along the length. The bidirectional telescopic protective covers 2 are provided with sliding grooves at the left and right ends in the width direction. Through the sliding grooves, they are slidably connected to the first protective cover guide rails 103 at the left and right ends of the bed 1 and the second protective cover guide rails 301 at the left and right ends of the protective cover supports 3. Furthermore, a first mounting plate 201 and a second mounting plate 202 are fixedly connected to the two ends in the length direction of the bidirectional telescopic protective covers 2. The first mounting plate 201 and the protective cover supports 301 are connected to the first mounting plate 202 and the second mounting plate 202, respectively. The first protective cover connecting plate 302 on the frame 3 is provided with correspondingly distributed mounting holes, 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 correspondingly distributed mounting holes, and the two are also detachably fixedly connected by screws. It should be noted that under normal working conditions, 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 transmission mechanism 4 and the guide mechanism can be well protected.

[0058] like Figure 1 , Figure 3 , Figure 8 , Figure 9 As shown, a displacement detection mechanism is also provided between the slide plate 5 and the bed 1 to detect 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 direction parallel to the length of the inclined rack 6, as shown. Figure 9As shown, the middle part of the second protective cover connecting plate 501 at the front end of the slide plate 5 is detachably fixedly connected with a magnetic scale reading head mounting bracket 503, and the reading head 25 of the magnetic scale is fixedly connected with the slide plate 5 through the magnetic scale reading head mounting bracket 503, and the reading head 25 is distributed in correspondence with the position of the magnetic scale 26. The displacement of the slide plate 5 along the length direction of the lathe bed 1 can be detected through the magnetic scale, and the coordinate distance of the forward and backward movement of the slide plate 5 can be read through the magnetic scale. When the displacement distance measured by the magnetic scale does not match the single gear and rack pair transmission mechanism 4, the position of the speed reducer mounting plate 8 in the adjusting groove 508 can be adjusted through the locking bolt 17, so that the helical gear 7 and the helical gear rack 6 are kept in a reasonable meshing gap. When the difference is too large, it indicates that the gear is seriously worn, and the gear can be considered to be replaced, so as to eliminate the adverse effects caused by the pitch error and the reverse clearance of the single gear and rack pair transmission mechanism 4, thereby improving the accuracy of the control of the whole ultra-long displacement driving system.

[0059] As shown in Figure 1 , Figure 3 , Figure 9 , Figure 10 As shown, the slide plate 5 and the lathe bed 1 are further provided with a position detection device for detecting the initial origin position and the front and rear end limit position of the slide plate 5. Specifically, the position detection device comprises a three-contact switch 27, a first striker mounting plate 28 and a second striker mounting plate 31, as shown in Figure 9As shown, the front end face right side position of the slide plate 5 is detachably fixedly connected with a contact switch mounting bracket 504 through a screw, a three-contact switch 27 is fixedly connected with the contact switch mounting bracket 504, and three switch contacts of the three-contact switch 27 are distributed along the width direction of the bed body 1; a first impact block mounting plate 28 is fixedly connected with the front end position of the first split bed body 101, a second impact block mounting plate 31 is fixedly connected with the rear end position of the second split bed body 102, an impact block mounting hole 1011 is arranged at the right side of the front end of the upper end face of the first split bed body 101, the first impact block mounting plate 28 is detachably fixedly connected with the impact block mounting hole 1011 through a screw to complete the fixation with the first split bed body 101, and an original point impact block 29 and a front end limiting impact block 30 are fixedly connected with the first impact block mounting plate 28 from left to right; an impact block mounting hole 1011 (not shown in the figure) is arranged at the right side of the rear end position of the second split bed body 102, the second impact block mounting plate 31 is detachably fixedly connected with the second split bed body 102 through a screw, a rear end limiting impact block 32 is fixedly connected with the second impact block mounting plate 31, the rear end limiting impact block 32 is located at the right side of the front end limiting impact block 30 in the width direction of the bed body 1, and the original point impact block 29, the front end limiting impact block 30 and the rear end limiting impact block 32 respectively correspond to three groups of contact switches on the three-contact switch 27, when the three-contact switch 27 respectively contacts the original point impact block 29, the front end limiting impact block 30 and the rear end limiting impact block 32 during the sliding of the slide plate 5 along the bed body 1, the starting original point position and the front and rear end limiting coordinate positions of the slide plate 5 moving on the bed body 1 can be limited.

[0060] It should be noted that when the number of split bed bodies is greater than two, the first impact block mounting plate 28 and the second impact block mounting plate 31 are respectively arranged at the front and rear end positions of the bed body 1, and no impact block mounting plate and impact block are arranged on the split bed body at the middle position.

[0061] As shown in Figure 3 , Figure 9 , a bump stop device is further arranged between the bed body 1 and the slide plate 5, the bump stop device comprises a bump stop seat 23, a buffer pad 24 and a bump plate 502, in the embodiment, the bump stop seat 23 is fixedly connected with the two end portions in the length direction of the bed body 1, as shown in Figure 3 , a bump stop seat mounting hole 1010 is arranged at the left side of the front end of the upper end face of the first split bed body 101, the bump stop seat 23 is detachably fixedly connected with the bump stop seat mounting hole 1010 through a screw, and the second split bed body 102 is also symmetrically provided with the bump stop seat 23 (not shown in the figure) at the left side of the rear end of the upper end face, the buffer pad 24 is fixedly connected with the side face of the bump stop seat 23 close to the slide plate 5, the buffer pad 24 is made of a material with a certain elasticity and has a certain buffering effect; as shown in Figure 9As shown, the impact plate 502 is fixedly connected to the left side of the two ends of the slide plate 5 in the length direction, and the impact plate 502 corresponds to the position of the buffer pad 24. Through the arrangement of the anti-collision device, the slide plate 5 can be prevented from sliding out of the extreme position of the front and rear ends due to control failure.

[0062] As shown in Figure 1 , Figure 3 , Figure 9 , Figure 11 , Figure 12 and Figure 13 , a locking mechanism is further arranged between the slide plate 5 and the bed body 1 to fix the position of the slide plate 5 in the length direction of the bed body 1. Specifically, the locking mechanism includes a locking oil cylinder 19 and a clamping strip 106, as shown in Figure 3 and Figure 9 , the clamping strip 106 is fixedly connected to the upper end face of the first and second split bed bodies 101 and 102, and the length of the clamping strip 106 is distributed along the length direction of the bed body 1, as shown in Figure 11 , the slide plate 5 is provided with a mounting groove 507 distributed in the thickness direction of the slide plate 5, 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 body 1, and the locking oil cylinder 19 is connected with a clamping jaw at the lower end. The clamping jaw includes a fixed jaw body 1902 and a movable jaw body 1903 which are spaced apart along the width direction of the bed body 1. The fixed jaw body 1902 is fixedly connected with the cylinder body of the locking oil cylinder 19, and the movable jaw body 1903 is fixedly connected with the movable end of the piston rod 1901 of the locking oil cylinder 19. The locking oil cylinder 19 can drive the movable jaw body 1903 to move towards or away from the fixed jaw body 1902 along the width direction of the bed body 1 through the piston rod 1901, so as to realize clamping or loosening of the clamping strip 106. In the clamping state, the slide plate 5 is locked between the clamping strip 106 of the bed body 1, and the slide plate 5 cannot slide along the bed body 1. In the loosening state, the slide plate 5 can slide along the length direction of the bed body 1.

[0063] In addition, a floating guide mechanism is arranged between the slide plate 5 and the locking oil cylinder 19, the floating guide mechanism comprises guide plates 20, spring seats 21 and floating springs 22, the upper end surface of the slide plate 5 is provided with a floating groove 506 located outside the mounting groove 507, the guide plates 20 are located in the floating groove 506 and are provided in 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 is slidably connected between the two groups of guide plates 20 in the width direction of the lathe bed 1, one group of spring seats 21 is arranged between the left and right side walls of the floating groove 506 and the cylinder body of the locking oil cylinder 19, the base of the spring seat 21 is detachably fixedly connected in the floating groove 506 of the slide plate 5 through screws, the floating spring 22 is sleeved outside the guide column of the spring seat 21 and is connected between the cylinder body of the locking oil cylinder 19 and the spring seat 21 at both ends, and through the arrangement of the floating guide mechanism, the fixed jaw body 1902 and the movable jaw body 1903 can be uniformly separated in the left and right directions of the clamping strip 106, the left and right clamping surfaces of the two jaw bodies corresponding to the clamping strip 106 are ensured to have sufficient gaps in the relaxed state, and interference between the two jaw bodies and the clamping strip 106 during the movement of the slide plate 5 in the length direction of the lathe bed 1 is avoided.

[0064] The preferred embodiments of the utility model are described above, and it should be noted that: for ordinary skilled persons in the art, several improvements can be made without departing from the principles of the utility model, and these improvements should also be regarded as the protection scope of the utility model.

Claims

1. An ultra-long displacement drive system for automatic drilling of a steel rail, characterized in that, The utility model relates to a kind of bed, including: Bed body; Protective cover support, fixedly connected to the both ends of the length direction of bed body; Single gear rack pair transmission mechanism, by sliding plate, helical rack, helical gear and drive device, the sliding plate is slidably connected on the top of bed body, the helical rack is fixedly connected on the top of bed body and is distributed along the length direction of bed body, the drive device is fixedly connected with sliding plate and output end is connected with helical gear transmission, helical gear is meshed with helical rack and is connected; Displacement detection mechanism, between bed body and sliding plate, for detecting the displacement distance of sliding plate along the length direction of bed body; Locking mechanism, between bed body and sliding plate, for fixing the relative position between sliding plate and bed body, and is provided with two states of clamping and loosening; Two-way telescopic protective cover, slidably connected on the top of bed body and protective cover support, the both ends of the length direction of two-way telescopic protective cover are respectively detachably fixedly connected with the end of protective cover support away from bed body and the length direction end of sliding plate.

2. The over-length displacement drive system for automatic drilling of a steel rail according to claim 1, wherein, The drive device includes servo motor, speed reducer, speed reducer mounting plate, the speed reducer is fixedly connected on speed reducer mounting plate and input end is connected with servo motor output transmission, the output end of speed reducer is connected with helical gear transmission, speed reducer mounting plate is further connected with combined disc spring gap-adjusting pre-tightening mechanism between sliding plate, for adjusting the position of speed reducer mounting plate in the width direction of bed body, to drive helical gear to approach helical rack.

3. The overlength displacement drive system for automatic drilling of steel rails according to claim 2, characterized in that, Adjusting groove is provided on the sliding plate, the speed reducer mounting plate is slidably connected in the adjusting groove along the width direction of bed body, the combined disc spring gap-adjusting pre-tightening mechanism includes adjusting plate, locking bolt, disc spring guide column, the adjusting plate is fixedly connected on the top of sliding plate and is located on the side of adjusting groove in the width direction of bed body, the locking bolt is threadedly connected on the adjusting plate and the screw rod one end penetrates the adjusting plate and is tightly pressed on the side end face of speed reducer mounting plate, the axis of disc spring guide column is distributed along the width direction of bed body, one end is threadedly connected with adjusting plate, the other end is slidably connected with the recess on the side end face of speed reducer mounting plate along the width direction of bed body, disc spring is sleeved outside disc spring guide column, locking nut is threadedly connected with locking bolt and disc spring guide column between adjusting plate and speed reducer mounting plate.

4. The overlength displacement drive system for automatic drilling of a steel rail according to claim 3, characterized in that, The top of adjusting groove is further provided with pressing plate, the pressing plate includes first pressing plate and second pressing plate, the first pressing plate and adjusting plate are oppositely arranged and are respectively located on the both sides of adjusting groove in the width direction of bed body, the second pressing plate is provided with two groups, two groups of second pressing plates are respectively located on the both sides of adjusting groove in the length direction of bed body, and speed reducer mounting plate is slidably connected between two groups of second pressing plates along the length direction of bed body.

5. The over-length displacement drive system for automatic drilling of steel rails according to claim 1, characterized in that, The displacement detection mechanism is magnetic scale, the magnetic scale of magnetic scale is distributed along the length direction of bed body and is fixedly connected on the top of bed body, and the reading head of magnetic scale is fixedly connected on the length direction end of sliding plate.

6. The over-length displacement drive system for automatic drilling of steel rails according to claim 1, characterized in that, The locking mechanism includes clamping strip and locking oil cylinder, the clamping strip is fixedly connected on the top of bed body and is distributed along the length direction parallel to bed body, the sliding plate is provided with the installation slot hole that is distributed up and down, the locking oil cylinder is provided with clamping clamp, the cylinder body of locking oil cylinder is slidably connected with sliding plate through floating guide mechanism, and the clamping clamp extends below installation slot hole and cooperates with clamping strip to clamp or loosen clamping strip.

7. The overlength displacement drive system for automatic drilling of steel rails according to claim 6, characterized in that, The floating groove is arranged on the outside of the mounting groove, a floating guide mechanism is arranged between the cylinder body of the locking oil cylinder and the floating groove, the floating guide mechanism comprises a guide plate and a spring seat, the guide plate is arranged in two groups and is arranged on both sides of the cylinder body of the locking oil cylinder, the cylinder body of the locking oil cylinder is slidably connected between the two guide plates in the width direction of the bed body, the spring seat is fixedly connected in the floating groove and is arranged on both sides of the cylinder body of the locking oil cylinder in the direction of the piston rod axis of the locking oil cylinder, a floating spring is sleeved outside the guide column of the spring seat, and the two ends of the floating spring are connected with the base of the spring seat and the side wall of the cylinder body of the locking oil cylinder, respectively.

8. The over-length displacement drive system for automatic drilling of steel rails according to claim 1, characterized in that, The two ends of the bed body in the length direction are provided with a position detection device for detecting the limiting position of the sliding plate in the length direction of the bed body, the position detection device comprises a three-contact switch and a striker mounting plate, the three-contact switch is fixedly connected to one end of the sliding plate in the length direction by a switch support, the striker mounting plate comprises a first striker mounting plate and a second striker mounting plate arranged at the front and rear ends of the bed body in the length direction, respectively, the first striker mounting plate is provided with an origin striker and a front end limiting striker, the second striker mounting plate is provided with a rear end limiting striker, and the three contacts of the three-contact switch are distributed in one-to-one correspondence with the positions of the origin striker, the front end limiting striker and the rear end limiting striker in the width direction of the bed body.

9. The super long displacement drive system for automatic drilling of steel rail according to claim 1, wherein, The bed body and the sliding plate are further provided with a collision prevention device, the collision prevention device comprises a collision prevention seat, a buffer pad and a striker plate, the collision prevention seat is fixedly connected to the two ends of the bed body in the length direction, the buffer pad is fixedly connected to the side of the collision prevention seat close to the sliding plate, and the striker plate is fixedly connected to the two ends of the sliding plate in the length direction and corresponds to the buffer pad.

10. The over-length displacement drive system for automatic drilling of steel rails according to claim 1, characterized in that, The bed body is provided with a first protective cover guide rail and a sliding plate guide rail distributed in the length direction of the bed body, the protective cover support is provided with a second protective cover guide rail distributed in the length direction, the second protective cover guide rail is continuously distributed in position correspondence with the first protective cover guide rail, the lower end of the bidirectional telescopic protective cover is provided with a sliding groove connected with the first protective cover guide rail and the second protective cover guide rail in sliding connection, the end of the protective cover support away from the bed body is fixedly connected with a first protective cover connecting plate, the two ends of the sliding plate in the length direction are fixedly connected with a second protective cover connecting plate, the two ends of the bidirectional telescopic protective cover in the length direction are fixedly connected with a first mounting plate and a second mounting plate, the first mounting plate is detachably fixedly connected with the protective cover connecting plate, and the second mounting plate is detachably fixedly connected with the second protective cover connecting plate.

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