Cross beam convenient for replacing drill bit

Abstract

The utility model relates to a cross beam convenient for replacing a drill bit. A lifting supporting seat is horizontally and slidably arranged on the base, a clamping supporting seat is vertically and slidably arranged on the lifting supporting seat, a clamping part is fixedly arranged on the clamping supporting seat, and a replacement assembly is further arranged on the lifting supporting seat; the replacing assembly comprises a mounting plate, a first sliding driving device, a rotating driving device, a drill bit replacing plate and a second sliding driving device; the clamping part is provided with a clamping end, the drill bit replacing plate is provided with a plurality of containing holes which are sequentially and evenly arranged in the sliding direction, and all the containing holes can correspond to the clamping end through driving of the second sliding driving device and sliding fit between the drill bit replacing plate and the driving end of the rotating driving device; the drill bit replacing plate is driven by the first sliding driving device and is in sliding fit with the lifting supporting base through the mounting plate to be close to or away from the clamping end. The drill bit for boring or drilling can be quickly replaced, and the device is efficient and convenient.

Description

Technical Field

[0001] This utility model relates to a crossbeam that facilitates the replacement of drill bits. Background Technology

[0002] In large-scale machining, it is necessary to drill or bore the material. Specialized equipment is used for this purpose. Before drilling or boring, a specific type of drill bit must be manually installed on a crossbeam with a clamp before drilling or boring can be performed.

[0003] Since the installation is done manually, different drilling or boring requirements also require manual intervention. The drill bit needs to be suspended by a crane and then manually installed, which is time-consuming, labor-intensive, and inefficient.

[0004] A crossbeam is provided for easy drill bit replacement, enabling efficient replacement of different types of drill bits. Summary of the Invention

[0005] The purpose of this invention is to provide a crossbeam that facilitates the replacement of drill bits, enabling quick and efficient replacement of drill bits for boring or drilling.

[0006] The technical solution to achieve the purpose of this utility model is as follows: This utility model has a base; a horizontally sliding lifting support seat is provided on the base, and a vertically sliding clamping support seat is provided on the lifting support seat. A clamping part for clamping a drill bit is fixedly provided on the clamping support seat, and a replacement component for quickly changing the drill bit is also provided on the lifting support seat; the replacement component includes a mounting plate that is slidably and liftingably disposed on the lifting support seat, a first sliding drive device that is fixedly disposed on the lifting support seat and used to drive the mounting plate to slide, a rotation drive device that is fixedly disposed on the mounting plate, a drill bit replacement plate that is slidably disposed on the drive end of the rotation drive device, and a second sliding drive device that is fixedly disposed on the drive end of the rotation drive device and used to drive the drill bit replacement plate to slide; the clamping part has a clamping end, and the drill bit replacement plate is located directly below the clamping end. The drill bit replacement plate has a plurality of placement holes that are evenly arranged in sequence along the sliding direction. Each placement hole can be aligned with the clamping end by the drive of the second sliding drive device and the sliding cooperation between the drill bit replacement plate and the drive end of the rotation drive device. The drill bit replacement plate is moved closer to or further away from the clamping end by the drive of the first sliding drive device and the sliding cooperation between the mounting plate and the lifting support seat.

[0007] Furthermore, the side wall of the lifting support is provided with a first sliding groove extending along the sliding direction of the clamping support via a first rotating support. A first lead screw extending along the extension direction of the second sliding groove is rotated inside the second sliding groove. The upper end of the first sliding groove has a through hole through which the first lead screw passes. One end of the first lead screw passes through the through hole. The driving end of the first sliding drive device is fixedly connected to the end of the first lead screw passing through the through hole. A first slider that can slide with the first sliding groove is fixedly provided on the mounting plate. The first slider has a first threaded hole that can thread with the first lead screw. The mounting plate is slidably mounted on the lifting support by the drive of the first sliding drive device and the threaded engagement between the first lead screw and the first threaded hole.

[0008] Furthermore, the drill bit replacement plate is provided with a second sliding groove extending along the sliding direction of the lifting support seat, and a sliding groove is provided on the side wall of the second sliding groove; a connecting rod is also provided, one end of the connecting rod is fixedly connected to the driving end of the rotating drive device, and a second slider that can form a sliding engagement with the first sliding groove is fixedly connected to the other end of the connecting rod. A sliding block that can be inserted into the sliding groove and forms a sliding engagement with the sliding groove is fixedly connected to the side wall of the second slider; a transmission gear is fixedly connected to the driving end of the second sliding drive device, and a rack extending along the extension direction of the second sliding groove and forming a transmission engagement with the transmission gear is provided on the drill bit replacement plate. The drill bit replacement plate slides through the sliding engagement of the slider and the second sliding groove, the sliding engagement of the sliding block and the sliding groove, the driving of the second sliding drive device, and the transmission engagement of the transmission gear and the rack.

[0009] Furthermore, a guide rail extends horizontally from the base, and a guide block that can slide with the guide rail is fixed on the lifting support. A second lead screw is also rotatably mounted on the base via a second rotating support. An extension block is fixed on the lifting support, and a second threaded hole that can thread with the second lead screw is provided on the extension block. A third sliding drive device is also fixed on the base. A first input gear is fixedly connected to the drive end of the third sliding drive device, and a first output gear is fixedly connected to one end of the second lead screw. The first input gear and the first output gear are connected by a first belt. The lifting support is slidably mounted on the base through the sliding engagement between the guide block and the guide rail, the drive of the third sliding drive device, the transmission engagement between the first input gear and the first output gear via the first belt, and the threaded engagement between the second threaded hole and the second lead screw.

[0010] Furthermore, the lifting support base is provided with a through groove, and the clamping support base is slidably disposed in the through groove. The clamping support base is hollow, and the clamping part is fixedly disposed in the hollow part of the clamping support base. A third lead screw is rotatably disposed in the through groove via a third rotating support base. A connecting plate is fixedly disposed on the side wall of the clamping support base. The connecting plate is provided with a third threaded hole that can form a threaded engagement with the third lead screw. A fourth sliding drive device is fixedly disposed on the lifting support base. A second input gear is fixedly connected to the drive end of the fourth sliding drive device. A second output gear is fixedly connected to one end of the third lead screw. The second input gear and the second output gear are connected by a second belt. The clamping part is slidably disposed on the lifting support base through the sliding engagement with the through groove, the sliding engagement between the guide block and the guide rail, the drive of the third sliding drive device, the transmission engagement between the second input gear and the second output gear through the second belt, and the threaded engagement between the second threaded hole and the second lead screw.

[0011] Furthermore, symmetrical limiting components are fixedly provided on the base, and the limiting components are located at the extreme sliding positions of the lifting support seat; each limiting component has a mounting plate fixedly provided on the base, a mounting platform fixedly provided on the mounting plate, and a limiting rod detachably fixedly provided on the mounting platform. The mounting platform is provided with a third screw hole, one end of the limiting rod is provided with a thread that can form a threaded fit with the third screw hole, and the other end of the limiting rod is fixedly provided with a limiting plate that can contact the lifting support seat. The limiting plates on the symmetrically provided limiting components are arranged opposite to each other.

[0012] Furthermore, a sensing device is fixedly installed on the lifting support base, and the sensing device is fixedly installed on the end of the lifting support base facing the drill bit replacement plate.

[0013] The present invention has the following positive effects: (1) The drill bit replacement plate of the present invention is provided with a plurality of placement holes arranged in a uniform manner along the sliding direction. Each placement hole can be driven by the second sliding drive device and the sliding cooperation between the drill bit replacement plate and the drive end of the rotary drive device to form a corresponding clamping end. The drill bit replacement plate is driven by the first sliding drive device and the sliding cooperation between the mounting plate and the lifting support to form a close or far relationship with the clamping end. The sliding of the mounting plate on the lifting support causes the drill bit in the placement hole to move toward or away from the clamping end, which facilitates the clamping or release of the drill bit. The drill bit replacement plate is slidably set at the drive end of the rotary drive device. The drill bit replacement plate is driven by the second sliding drive device to slide. The sliding drill bit replacement plate can drive different types of drill bits to the position of the clamping end, and then cooperate with the lifting and sliding of the mounting plate on the lifting support to replace different types of drill bits, which is efficient and convenient.

[0014] (2) The drill bit replacement plate of this utility model slides through the sliding cooperation between the slider and the second sliding groove, the sliding cooperation between the sliding block and the sliding groove, the driving of the second sliding drive device, and the transmission cooperation between the transmission gear and the rack. At the same time, the drill bit replacement plate can be rotated by the drive of the rotation drive device, which makes it easy to take out or put in the drill bit placed in the placement hole. The drill bit replacement plate can be rotated by the drive of the rotation drive device, which makes it easy to take out or put in the drill bit placed in the placement hole. At the same time, when the clamping part is working, the drill bit replacement plate can avoid the sliding path of the clamping support by rotating, without affecting the normal operation of the work.

[0015] (3) The lifting support base of this utility model is slidably mounted on the base through the sliding engagement of the guide block and the guide rail, the driving of the third sliding drive device, the transmission engagement formed by the first input gear and the first output gear through the first belt, and the threaded engagement of the second screw hole and the second lead screw. The horizontal sliding of the lifting support base can drive the clamping part to move horizontally. The clamping part is slidably mounted on the lifting support base through the sliding engagement with the through slot, the sliding engagement of the guide block and the guide rail, the driving of the third sliding drive device, the transmission engagement formed by the second input gear and the second output gear through the second belt, and the threaded engagement of the second screw hole and the second lead screw. The horizontal sliding of the clamping support base can drive the clamping part to move vertically. This makes the range of motion of the clamping part larger and enables it to perform more different positional operations.

[0016] (4) The base of this utility model is symmetrically fixed with a first limiting member and a second limiting member, which are respectively set at the extreme sliding position of the lifting support seat; to avoid the sliding of the lifting support seat exceeding the sliding range and causing unnecessary losses.

[0017] (5) A sensing device is fixedly provided on the lifting support base of this utility model. The sensing device is fixedly installed on the end of the lifting support base facing the drill bit replacement plate. The sensing device can sense the position of the drill bit replacement plate, thereby determining whether the placement hole corresponds to the clamping end. Attached Figure Description

[0018] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a front view of the present invention;

[0021] Figure 3 This is the left view of the present invention;

[0022] Figure 4 This is the right view of the present invention;

[0023] Figure 5 This is a top view of the present invention;

[0024] Figure 6 for Figure 1 Enlarged view of part A in the middle;

[0025] Figure 7 for Figure 1 Enlarged view of part B in the middle;

[0026] Figure 8 for Figure 1 A magnified view of part C in the middle.

[0027] In this figure, the components are: base 1, guide rail 11, second lead screw 12, first input gear 121, third sliding drive device 13, first output gear 131, limiting member 14, mounting plate 141, mounting platform 142, limiting rod 143, limiting plate 1431, lifting support 2, first slide groove 21, guide block a, extension block 22, fourth sliding drive device 23, second input gear 231, clamping support 3, clamping part 4, replacement component 5, mounting plate 51, first sliding drive device 52, rotation drive device 53, drill bit replacement plate 54, rack 541, second sliding drive device 55, transmission gear 551, placement hole 6, first slide groove 21, first lead screw 211, second slide groove 31, sliding groove 311, connecting rod 7, third lead screw 8, and second output gear 81. Detailed Implementation

[0028] See Figures 1 to 8This utility model has a base 1; a horizontally sliding lifting support 2 is provided on the base 1, and a vertically sliding clamping support 3 is provided on the lifting support 2. A clamping part 4 for clamping a drill bit is fixedly provided on the clamping support 3. The lifting support 2 is also provided with a replacement assembly 5 for quick drill bit replacement. The replacement assembly 5 includes a mounting plate 51 that is slidably and liftingably disposed on the lifting support 2, a first sliding drive device 52 that is fixedly disposed on the lifting support 2 and used to drive the mounting plate 51 to slide, a rotation drive device 53 that is fixedly disposed on the mounting plate 51, a drill bit replacement plate 54 that is slidably disposed on the drive end of the rotation drive device 53, and a second sliding drive device 55 that is fixedly disposed on the drive end of the rotation drive device 53 and used to drive the drill bit replacement plate 54 to slide. The clamping part 4 has a clamping end, and the drill bit replacement plate 54 is located directly below the clamping end. The drill bit replacement plate 54 has multiple clamping parts that slide along the direction of rotation. The placement holes 6 are arranged evenly in sequence. Each placement hole 6 can be driven by the second sliding drive device 55 and the drill bit replacement plate 54 can be slidably engaged with the drive end of the rotary drive device 53 to form a corresponding clamping end. The drill bit replacement plate 54 is driven by the first sliding drive device 52 and the mounting plate 51 can be slidably engaged with the lifting support 2 to move closer to or further away from the clamping end. The sliding of the mounting plate 51 on the lifting support 2 causes the drill bit replacement plate 54 to move the drill bit in the placement hole 6 toward or away from the clamping end, which facilitates the clamping or release of the drill bit. The drill bit replacement plate 54 is slidably set at the drive end of the rotary drive device 53. The drill bit replacement plate 54 is driven by the second sliding drive device 55 to slide. The sliding drill bit replacement plate 54 can bring different types of drill bits to the position of the clamping end, and then cooperate with the lifting and sliding of the mounting plate 51 on the lifting support 2 to change different types of drill bits, which is efficient and convenient.

[0029] The clamping part 4 is a hydraulic clamping device in the prior art, and its specific structure will not be described in detail here; the clamping end of the clamping part 4 has multiple jaws that can clamp the drill bit after retraction.

[0030] The side wall of the lifting support 2 is provided with a first sliding groove 21 extending along the sliding direction of the clamping support 3 via a first rotating support. Inside the first sliding groove 21 is a first lead screw 211 extending along the extension direction of the first sliding groove 21. The upper end of the first sliding groove 21 is provided with a through hole for the first lead screw 211 to pass through. One end of the first lead screw 211 passes through the through hole. The driving end of the first sliding drive device 52 is fixedly connected to the end of the first lead screw 21 that passes through the through hole. The mounting plate 51 is fixedly provided with a first slider that can form a sliding fit with the first sliding groove 21. The first slider is provided with a first threaded hole that can form a threaded fit with the first lead screw 211. The mounting plate 51 is slidably mounted on the lifting support 2 by the drive of the first sliding drive device 52 and the threaded fit between the first lead screw 211 and the first threaded hole.

[0031] The drill bit replacement plate 54 is provided with a second slide groove 31 extending along the sliding direction of the lifting support 2. The side wall of the second slide groove 31 is provided with a sliding groove 311. A connecting rod 7 is also provided. One end of the connecting rod 7 is fixedly connected to the driving end of the rotary drive device 53, and a second slider that can slide with the first slide groove 21 is fixedly connected to the other end of the connecting rod 7. A sliding block that can be inserted into the sliding groove 311 and slides with the sliding groove 311 is fixedly connected to the side wall of the second slider. A transmission gear 551 is fixedly connected to the driving end of the second sliding drive device 55. The drill bit replacement plate 54 is provided with a slide groove 31 extending along the sliding direction of the second slide groove 31. The rack 541 extends in the extension direction and can form a transmission engagement with the transmission gear 551. The drill bit replacement plate 54 slides through the sliding engagement of the slider and the second sliding groove 31, the sliding engagement of the sliding block and the sliding groove, the drive of the second sliding drive device 55, and the transmission engagement of the transmission gear 551 and the rack 541. The drill bit replacement plate 54 can be rotated by the drive of the rotation drive device 53, which facilitates the removal or placement of the drill bit placed in the placement hole 6. At the same time, when the clamping part 4 is working, the drill bit replacement plate 54 can avoid the sliding path of the clamping support 3 by rotation, without affecting the normal operation of the work.

[0032] A guide rail 11 extends horizontally on the base 1. A guide block a is fixed on the lifting support 2, which can slide with the guide rail 11. A second lead screw 12 is rotatably mounted on the base 1 via a second rotating support. An extension block 22 is fixed on the lifting support 2. The extension block 22 has a second threaded hole that can thread with the second lead screw 12. A third sliding drive device 13 is also fixed on the base 1. A first input gear 121 is fixedly connected to the drive end of the third sliding drive device 13. A first output gear 131 is fixedly connected to one end of the second lead screw 12. The first input gear 121 and the first output gear 131 are connected by a first belt. The lifting support 2 is slidably mounted on the base 1 through the sliding engagement of the guide block a with the guide rail 11, the drive of the third sliding drive device 13, the transmission engagement of the first input gear 121 and the first output gear 131 through the first belt, and the threaded engagement of the second threaded hole with the second lead screw 12.

[0033] The lifting support 2 is provided with a through groove, and the clamping support 3 is slidably disposed in the through groove. The clamping support 3 is hollow, and the clamping part 4 is fixedly disposed in the hollow part of the clamping support 3. A third lead screw 8 is rotatably disposed in the through groove via a third rotating support. A connecting plate is fixedly disposed on the side wall of the clamping support 3. The connecting plate is provided with a third threaded hole that can form a threaded engagement with the third lead screw 8. A fourth sliding drive device 23 is fixedly disposed on the lifting support 2. A second input gear 231 is fixedly connected to the drive end of the fourth sliding drive device 23. A second output gear 81 is fixedly connected to one end of the third lead screw 8. The second input gear 231 and the second output gear 81 are connected by a second belt. The clamping part 4 is slidably disposed on the lifting support 2 through the sliding engagement with the through groove, the sliding engagement between the guide block a and the guide rail 11, the drive of the third sliding drive device 13, the transmission engagement between the second input gear 231 and the second output gear 81 through the second belt, and the threaded engagement between the second threaded hole and the second lead screw 12.

[0034] A limiting member 14 is symmetrically fixed on the base 1. The limiting member 14 is located at the extreme sliding position of the lifting support 2. Each limiting member 14 has a mounting plate 141 fixedly mounted on the base 1, a mounting platform 142 fixedly mounted on the mounting plate 141, and a limiting rod 143 detachably fixedly mounted on the mounting platform 142. The mounting platform 142 is provided with a third screw hole. One end of the limiting rod 143 is provided with a thread that can form a threaded fit with the third screw hole. The other end of the limiting rod 143 is fixedly provided with a limiting plate 1431 that can contact the lifting support 2. The limiting plates 1431 on the symmetrically arranged limiting members 14 are arranged opposite to each other.

[0035] A sensing device is fixedly installed on the lifting support 2. The sensing device is fixedly installed on the end of the lifting support 2 facing the drill bit replacement plate 54. The sensing device is connected to the host computer through a signal and can sense the position of the drill bit replacement plate 54, thereby determining whether the placement hole 6 corresponds to the clamping end of the clamping part 4, thereby controlling the rotation drive device 53 and the second sliding drive device 55 to work or stop working.

[0036] The working principle of this utility model is as follows: Different types of drill bits are placed in the respective placement holes 6. The first sliding drive device 52 drives the mounting plate 51 to slide, and the mounting plate 51 drives the drill bit changing plate 54 to reach below the clamping part 4. The rotation drive device 53 drives the drill bit changing plate 54 to rotate. When the drill bit changing plate 54 rotates to directly below the clamping part 4, it stops rotating. The second sliding drive device 55 slides the drill bit changing plate 54, so that the drill bit of the required type slides directly below the clamping end of the clamping part 4. At this time, the first sliding drive device 52 drives the mounting plate 51 to slide. The mounting plate 51 slides, and the mounting plate 51 drives the drill bit replacement plate 54 to slide, pushing the drill bit in the placement hole 6 into the clamping end of the clamping part 4, where the clamping part 4 clamps the drill bit. Then, the first sliding drive device 52 drives the mounting plate 51 to slide, and the mounting plate 51 drives the drill bit replacement plate 54 to slide down. The rotation drive device 53 drives the drill bit replacement plate 54 to rotate, so that the drill bit mounting plate 51 moves away from directly below the clamping part 4. Then, the first sliding drive device 52 drives the mounting plate 51 to slide, and the mounting plate 51 drives the drill bit replacement plate 54 to slide up, completing the installation of the drill bit.

[0037] The third sliding drive device 13 drives the lifting support 2 to slide on the base 1, and the fourth sliding drive device 23 drives the clamping support 3 to slide on the lifting support 2, thereby enabling the clamping part 4 to perform drilling and other operations at different positions.

[0038] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A crossbeam for facilitating the exchange of drill heads, having a base (1); characterized in that: The base (1) is provided with a horizontal sliding lifting support seat (2), the lifting support seat (2) is vertically slidably provided with a clamping support seat (3), the clamping support seat (3) is fixedly provided with a clamping part (4) for clamping a drill bit, and the lifting support seat (2) is further provided with a replacement assembly (5) for quickly replacing the drill bit; the replacement assembly (5) comprises a mounting plate (51) slidably arranged on the lifting support seat (2), a first sliding drive device (52) fixedly arranged on the lifting support seat (2) and used for driving the mounting plate (51) to slide, a rotating drive device (53) fixedly arranged on the mounting plate (51), a drill bit replacement plate (54) slidably arranged on the driving end of the rotating drive device (53), and a second sliding drive device (55) fixedly arranged on the driving end of the rotating drive device (53) and used for driving the drill bit replacement plate (54) to slide; the clamping part (4) has a clamping end, the drill bit replacement plate (54) is located directly below the clamping end, a plurality of placement holes (6) are arranged on the drill bit replacement plate (54) and uniformly arranged along the sliding direction, each placement hole (6) can be correspondingly formed with the clamping end through the driving of the second sliding drive device (55) and the sliding cooperation of the drill bit replacement plate (54) and the driving end of the rotating drive device (53), and the drill bit replacement plate (54) is formed to be close to or away from the clamping end through the driving of the first sliding drive device (52) and the sliding cooperation of the mounting plate (51) and the lifting support seat (2).

2. A cross rail for facilitating bit change according to claim 1, wherein: The side wall of the lifting support seat (2) is rotatably provided with a first sliding groove (21) extending along the sliding direction of the clamping support seat (3) through a first rotating support seat, a first lead screw (211) extending along the extension direction of the first sliding groove (21) is rotatably arranged in the first sliding groove (21), the upper end of the first sliding groove (21) is provided with a through hole through which the first lead screw (211) passes, one end of the first lead screw (211) passes through the through hole and is arranged, the driving end of the first sliding drive device (52) is fixedly connected with the one end of the first lead screw (211) passing through the through hole, a first sliding block is fixedly arranged on the mounting plate (51) and can be slidably matched with the first sliding groove (21), and a first screw hole is arranged on the first sliding block and can be threadedly matched with the first lead screw (211); the mounting plate (51) is slidably arranged on the lifting support seat (2) through the driving of the first sliding drive device (52) and the thread cooperation of the first lead screw (211) and the first screw hole.

3. The crossbeam of claim 1, wherein: The drill bit replacement plate (54) is provided with a second sliding groove (31) extending along the sliding direction of the lifting support base (2), and a sliding groove (311) is arranged on the side wall of the second sliding groove (31); a connecting rod (7) is further arranged, one end of the connecting rod (7) is fixedly connected to the driving end of the rotating driving device (53), the other end of the connecting rod (7) is fixedly connected with a second sliding block capable of slidingly cooperating with the first sliding groove (21), and a sliding block capable of being inserted into the sliding groove (311) and forming a sliding cooperation with the sliding groove (311) is fixedly connected to the side wall of the second sliding block; the driving end of the second sliding driving device (55) is fixedly connected with a transmission gear (551), and the drill bit replacement plate (54) is provided with a rack (541) extending along the extension direction of the second sliding groove (31) and capable of forming a transmission cooperation with the transmission gear (551), and the drill bit replacement plate (54) is slidably arranged by the sliding cooperation of the sliding block and the second sliding groove (31), the sliding cooperation of the sliding block and the sliding groove, the driving of the second sliding driving device (55), and the transmission cooperation of the transmission gear (551) and the rack (541).

4. The cross rail of claim 1 wherein: The base (1) is provided with a guide rail (11) extending horizontally, the lifting support base (2) is fixedly provided with a guide block (a) capable of forming a sliding cooperation with the guide rail (11), the base (1) is further rotatably provided with a second lead screw (12) through a second rotating support base, the lifting support base (2) is fixedly provided with an extension block (22), the extension block (22) is provided with a second screw hole capable of forming a threaded cooperation with the second lead screw (12), and the base (1) is further fixedly provided with a third sliding driving device (13), the driving end of the third sliding driving device (13) is fixedly connected with a first input gear (121), one end of the second lead screw (12) is fixedly connected with a first output gear (131), and the first input gear (121) and the first output gear (131) are connected through a first belt, and the lifting support base (2) is slidably arranged on the base (1) through the sliding cooperation of the guide block (a) and the guide rail (11), the driving of the third sliding driving device (13), the transmission cooperation of the first input gear (121) and the first output gear (131) through the first belt, and the threaded cooperation of the second screw hole and the second lead screw (12).

5. The cross rail of claim 1 wherein: The lifting support base (2) is provided with a through slot, the clamping support base (3) is slidingly arranged in the through slot, the clamping support base (3) is hollow, and the clamping part (4) is fixedly arranged in the hollow of the clamping support base (3); the third screw rod (8) is rotatably arranged in the through slot through the third rotating support base, the connecting plate is fixedly arranged on the side wall of the clamping support base (3), the third screw hole is arranged on the connecting plate and can be threadedly matched with the third screw rod (8), the fourth sliding driving device (23) is fixedly arranged on the lifting support base (2), the second input gear (231) is fixedly connected to the driving end of the fourth sliding driving device (23), the second output gear (81) is fixedly connected to one end of the third screw rod (8), the second input gear (231) and the second output gear (81) are connected through the second belt, and the clamping part (4) is slidingly arranged on the lifting support base (2) through the sliding cooperation with the through slot, the sliding cooperation of the guide block (a) and the guide rail (11), the driving of the third sliding driving device (13), the transmission cooperation of the second input gear (231) and the second output gear (81) through the second belt and the threaded cooperation of the second screw hole and the second screw rod (12).

6. The cross rail of claim 1 wherein: The base (1) is fixedly provided with the limiting pieces (14) symmetrically, the limiting pieces (14) are arranged at the sliding limit positions of the lifting support base (2); the limiting pieces (14) each have the mounting sheet (141) fixedly arranged on the base (1), the mounting table (142) fixedly arranged on the mounting sheet (141) and the limiting rod (143) detachably fixedly arranged on the mounting table (142), the third screw hole is arranged on the mounting table (142), the thread is arranged on one end of the limiting rod (143) and can be threadedly matched with the third screw hole, the limiting plate (1431) that can be in contact with the lifting support base (2) is fixedly arranged on the other end of the limiting rod (143), and the limiting plates (1431) on the symmetrically-arranged limiting pieces (14) are oppositely arranged.

7. The cross rail of claim 1 wherein: The lifting support base (2) is fixedly provided with the sensing device, and the sensing device is fixedly arranged on one end of the lifting support base (2) facing the drill bit replacement plate (54).

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