A bushing drilling device

Abstract

This application relates to the field of workpiece drilling, and particularly to a bushing drilling device, including a sleeve table, a chuck portion provided on the sleeve table for clamping and fixing the bushing, a drill body for forming radial holes on the inner wall of the bushing, a drill body moving portion for driving the drill body into the bushing for drilling operations, and the distance L 总 between the initial position of the drill body after it enters the bushing and the position of the drill body when the drilling of the bushing is completed, which is controlled by a total pitch laser sensor, and the distance L 初 between the initial position of the drill body and the position of the bushing to be drilled, which is detected by an initial pitch laser sensor; defining the drilling depth of the radial hole as Z, then L 总 =Z + L 初 , so as to ensure that during the drilling process of each radial hole, the depth value of the finally obtained radial hole is not likely to have a large gap from the preset value, reducing the impact on the quality of the radial hole.

Description

Technical Field

[0001] This application relates to the field of workpiece drilling, and in particular to a bushing drilling device. Background Art

[0002] A bushing is an important component for a rotating shaft to achieve low wear and high-efficiency rotation. To improve the lubrication performance of the bushing for the rotating shaft, some rotating shafts will have radial holes opened on their inner walls and graphite inserted. For example, a bushing with sustainable lubrication, with the bushing body and the outer bushing both having corresponding radial holes. The radial holes are evenly arranged in several circles along the axial direction of the bushing body, and several radial holes are evenly arranged around the axis of the bushing body in each circle. Moreover, the radial holes of the bushing body are through holes, and the radial holes on the inner wall side of the outer bushing communicate with the corresponding oil storage chambers of the outer bushing.

[0003] In order to precisely machine the radial holes in the outer bushing, it is necessary to accurately measure the drilling depth of the drill bit. For example, a laser sensor hole inspection device with the publication number CN207688839U. During the drilling process, a laser displacement sensor monitors the drilling depth in real time to ensure the drilling accuracy.

[0004] In view of the above related technologies, the laser displacement sensor detects the entire moving distance of the drill bit, which includes the distance between the initial position of the drill bit and the bushing. However, the distance between the initial position of the drill bit and the bushing inevitably varies during each drilling process. As a result, during the process of relying on the laser displacement sensor to detect the moving distance of the drill bit with a fixed value, it is difficult to accurately control the drilling depth of the radial holes, and the machining quality of the radial holes is easily affected. Summary of the Invention

[0005] In order to reduce the impact on the machining quality of the radial holes, this application provides a bushing drilling device.

[0006] The bushing drilling device provided in this application adopts the following technical solutions.

[0007] A bushing drilling device includes a sleeve table, a clamping sleeve part provided on the sleeve table for clamping and fixing the bushing, an electric drill body for forming radial holes on the inner wall of the bushing, an electric drill body moving part for driving the electric drill body into the bushing to perform drilling operations, and a total distance laser sensor for controlling the distance L between the initial position of the electric drill body after entering the bushing and the position of the electric drill body when the drilling is completed. 总 An initial distance laser sensor for detecting the distance L between the initial position of the electric drill body and the position to be drilled on the bushing. 初 Define the drilling depth of the radial hole as Z, then L 总 =Z + L 初 .

[0008] By adopting the above technical solution, before drilling, the measurement of L will be carried out first 初 to obtain the actual L before each drilling 初 so as to obtain L 总 so that the depth of the radial hole formed by each drilling is not likely to have a large deviation from the preset value, thereby reducing the influence on the forming quality of the radial hole.

[0009] Optionally, the moving part of the electric drill body includes a side platform, a cylinder seat slidably connected to the side platform and capable of changing its height, a vertical cylinder arranged on the side platform to move the cylinder seat, an axial cylinder arranged on the cylinder seat with the power rod moving along the axis direction of the sleeve, a middle rod detachably connected to the power rod of the axial cylinder, a radial displacement block slidably connected to the middle rod along the radial direction of the sleeve and detachably connected to the electric drill body, and a radial displacement cylinder arranged on the middle rod to move the radial displacement block. The initial distance laser sensor is located at one end of the middle rod entering the sleeve.

[0010] By adopting the above technical solution, the electric drill body can move freely within the plane where the sleeve is located, so that for sleeves of different specifications, the electric drill body can enter to form radial holes, improving the applicability.

[0011] Optionally, the power rod of the radial displacement cylinder is detachably connected with a shaft push rod that can abut against the radial displacement block. The shaft push rod is slidably connected inside the middle rod along the moving direction of the power rod of the axial cylinder. The surfaces of the shaft push rod and the radial displacement block that abut against each other are both inclined surfaces so that the shaft push rod can push the radial displacement block to move. A return spring that forces the radial displacement block to move towards the axis of the middle rod is detachably connected between the radial displacement block and the middle rod. The detection end of the total distance laser sensor faces one end of the shaft push rod exposed outside the middle rod.

[0012] By adopting the above technical solution, the movement of the shaft push rod along the axis direction of the sleeve can make the electric drill body move along the radial direction of the sleeve. Moreover, the total distance laser sensor can be set outside to detect the moving distance of the shaft push rod, so as to know the moving distance of the electric drill body along the radial direction of the sleeve, reducing the volume of one end of the middle rod entering the sleeve and making the present application applicable to drilling sleeves with as small an inner diameter as possible.

[0013] Optionally, several radial displacement blocks are evenly arranged around the center line of the middle rod. The number of radial displacement blocks is even, and each radial displacement block is for installing an electric drill body.

[0014] By adopting the above technical solution, when the electric drill body drills, the middle rod will bear a certain radial pressure. By symmetrically arranging the electric drill bodies, the radial pressures generated when two opposite electric drill bodies drill synchronously can cancel each other out, reducing the deformation amount of the middle rod generated during long-term operation, and also being able to form multiple radial holes at one time, improving the processing efficiency.

[0015] Optionally, a face laser sensor is detachably connected to the center of one end face of the middle rod entering the bushing. A positioning hole is formed at a position of the clamping sleeve portion corresponding to the axis of the bushing. Several initial distance laser sensors are uniformly arranged around the center line of the middle rod.

[0016] By adopting the above technical solution, after the middle rod enters the bushing along a predetermined path, the face laser sensor will detect whether it is aligned with the positioning hole at this time, and multiple initial distance laser sensors simultaneously detect the distance from the inner wall of the bushing, so as to ensure that the center line of the middle rod and the center line of the bushing are consistent, so that in the subsequent forming process of the radial holes, the depths of the radial holes formed by different drill bodies are not likely to have a large difference.

[0017] Optionally, one initial distance laser sensor is provided corresponding to each drill body. All the initial distance laser sensors are detachably connected to the same distance adjustment ring. Each distance adjustment ring is slidably connected to the middle rod along the center line of the middle rod. A distance adjustment electric cylinder for moving the distance adjustment ring is provided in the middle rod. The distance between the drill body and the initial distance laser sensor is equal to the distance between two adjacent rows of radial holes in the axial direction of the bushing.

[0018] By adopting the above technical solution, the initial distance laser sensor will perform L 初 detection at each position on the inner wall of the bushing where the radial holes are formed, so as to ensure that the depth of each radial hole is not likely to have a large deviation. And except for the outermost circle of radial holes, the L 初 detection work of the remaining circles of radial holes can be synchronously detected during the forming process of the corresponding upper circle of radial holes, so as to improve the processing efficiency. In addition, the distance between the initial distance laser sensor and the drill body can be adjusted adaptively to better suit the processing of bushings with different distances between two adjacent circles of radial holes.

[0019] Optionally, the clamping sleeve portion includes a rotating member rotatably connected to the sleeve table, a rotating member motor provided on the sleeve table for rotating the rotating member, several outer clamping claws slidably connected to the rotating member and capable of abutting against the outer surface of the bushing, an outer plane thread disc rotatably connected to the rotating member and threadedly connected to all the outer clamping claws, an outer ring gear coaxially and fixedly connected to the circumferential surface of the outer plane thread disc, an outer side gear rotatably connected to the rotating member and meshing with the outer ring gear, and an outer clamping motor for driving the outer side gear to rotate.

[0020] By adopting the above technical solution, the bushing is placed between all the outer clamping claws to be clamped and fixed. And after the bushing is clamped, the rotating member rotates, so that the bushing rotates around its own axis, so as to facilitate the forming of each circle of radial holes in the bushing when the number of drill bodies is less than the number of radial holes in each circle.

[0021] Optionally, the rotating member is slidably connected to several internal expansion blocks that can abut against the inner surface of the sleeve, and the rotating member is rotatably connected to an inner planar threaded disk that meshes with all the internal expansion blocks. The circumferential surface of the inner planar threaded disk is coaxially fixedly connected to an inner ring gear, the inner ring gear meshes with an inner gear rotatably connected to the rotating member, and the rotating member is provided with an internal expansion motor that drives the inner gear to rotate.

[0022] By adopting the above technical scheme, the radial holes of the shaft sleeve divided into inner and outer layers can be formed synchronously after assembly, which not only improves the processing efficiency, but also makes it difficult for the inner and outer layers of the shaft sleeve to rotate relative to each other during the radial hole forming process of the inner and outer layers of the shaft sleeve. The radial holes between the inner and outer layers of the same shaft sleeve can be better aligned and connected, which helps to reduce the impact on the processing quality of the radial holes of the inner and outer layers of the shaft sleeve.

[0023] Optionally, the outer clamping jaw is fixedly connected with an end abutment piece capable of abutting against the end surface of the sleeve.

[0024] By adopting the above technical solution, the end face of the sleeve is not easily in direct contact with the rotating part, so as to ensure that there is a sufficient distance between the sleeve and the rotating part, so that the end of the middle rod can be partially exposed at the end of the sleeve close to the rotating part and will not come into contact with the rotating part, thereby reducing the possibility of damage to the middle rod.

[0025] Optionally, the end abutment includes a fixed rod fixedly connected to the outer clamp, a moving rod radially slidably connected to the fixed rod and capable of abutting against the end surface of the sleeve, an adjusting screw rotatably connected to the fixed rod and threadedly connected to the moving rod, and a rotating block rotatably connected to the fixed rod and coaxially fixedly connected to the adjusting screw.

[0026] By adopting the above technical solution, the position of the moving rod on the fixed rod can be adjusted according to the sleeves with different wall thicknesses, so that the moving rod can have as much contact area as possible with the end face of the sleeve, while the moving rod is not easy to get too close to the axis of the sleeve, so as to reduce the possibility of conflict between the middle rod and the moving rod.

[0027] In summary, the present application includes at least the following beneficial effects.

[0028] Before drilling, L 初 The actual L before each drilling is measured. 初 To obtain L 总 , so that the depth of the radial hole formed by each drilling is not likely to deviate greatly from the preset value, thereby reducing the impact on the forming quality of the radial hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the main structure of this application;

[0030] Figure 2It is a schematic structural diagram of a partial cross-section of the rotating part facing the side of the electric drill body;

[0031] Figure 3 is Figure 2 the enlarged view of part A in

[0032] Figure 4 It is a schematic structural diagram of a cross-section of the middle rod.

[0033] Explanation of reference numerals: 1. Clamping sleeve part; 2. Electric drill body; 21. Distance adjustment ring; 22. Distance adjustment electric cylinder; 23. Rotating part; 24. Rotating part motor; 3. Electric drill body moving part; 31. Inner flat thread disc; 32. Inner ring gear; 33. Inner side gear; 34. Inner expansion motor; 35. End abutting part; 36. Fixed rod; 37. Moving rod; 38. Adjusting lead screw; 39. Rotating block; 4. Total distance laser sensor; 41. Return spring; 42. End face laser sensor; 43. Positioning hole; 44. Outer clamping jaw; 45. Outer flat thread disc; 46. Outer ring gear; 47. Outer side gear; 48. Outer clamping motor; 49. Inner expansion block; 5. Initial distance laser sensor; 51. Sleeve table; 52. Axial air cylinder; 53. Middle rod; 54. Radial displacement block; 55. Side table; 56. Cylinder seat; 57. Vertical air cylinder; 58. Radial displacement air cylinder; 59. Axial push rod. Specific implementation manners

[0034] The following further elaborates on the present application with reference to the accompanying drawings.

[0035] An embodiment of the present application discloses a shaft sleeve drilling device. Referring to Figure 1 , it includes a sleeve table 51 placed on the ground. The sleeve table 51 is equipped with a clamping sleeve part 1 for clamping and fixing the shaft sleeve. On the ground on one side of the sleeve table 51, there is an electric drill body moving part 3. There is an electric drill body 2 at one end of the shaft sleeve away from the sleeve table 51. The drill bit direction of the electric drill body 2 is consistent with the radial direction of the shaft sleeve. The electric drill body moving part 3 enables the electric drill body 2 to move in the vertical plane so that the electric drill body 2 can enter or exit the shaft sleeve for drilling operations.

[0036] Referring to Figure 2 and Figure 3, the jacket part 1 includes a rotating member 23 rotatably connected to the sleeve table 51. The rotation axis of the rotating member 23 is consistent with the axis of the sleeve. The sleeve table 51 is detachably connected with a rotating member motor 24 that transmits power through gear meshing to drive the rotation of the rotating member 23. At least three outer clamping jaws 44 are slidably connected to the end face of the rotating member 23 close to the sleeve. In this embodiment, the number of the outer clamping jaws 44 can be three. The moving direction of the outer clamping jaws 44 is the radial direction of the sleeve. All the outer clamping jaws 44 are uniformly arranged around the axis of the rotating member 23. An outer flat thread disc 45 is coaxially and rotatably connected inside the rotating member 23. The outer flat thread disc 45 is threadedly connected to all the outer clamping jaws, so that all the outer clamping jaws 44 can move synchronously to clamp or release the outer surface of the sleeve. An outer ring gear 46 is coaxially and fixedly connected to the circumferential outer surface of the outer flat thread disc 45. The outer ring gear 46 meshes with an outer side gear 47 rotatably connected inside the rotating member 23. The rotating member 23 is detachably connected with an outer clamping motor 48 whose output shaft is coaxially and detachably connected to the outer side gear 47.

[0037] Referring to Figure 2 and Figure 3 , at least three inner expanding blocks 49 are slidably connected to the surface of the rotating member 23 where the outer clamping jaws 44 are arranged. The number of the inner expanding blocks 49 can be the same as that of the outer clamping jaws 44. Each inner expanding block 49 corresponds to one outer clamping jaw 44. The straight line where the moving direction of each inner expanding block 49 is located is consistent with the straight line where the moving direction of the corresponding outer clamping jaw 44 is located, so that the inner expanding blocks 49 and the outer clamping jaws 44 are in one-to-one correspondence and abut against the opposite positions on the inner and outer sides of the sleeve, reducing the possibility of the sleeve deforming under the action of shear force. An inner flat thread disc 31 is coaxially and rotatably connected inside the rotating member 23. The outer diameter of the inner flat thread disc 31 is smaller than the inner diameter of the outer flat thread disc 45. The inner flat thread disc 31 is threadedly connected to all the inner expanding blocks 49. An inner ring gear 32 is coaxially and fixedly connected to the outer circumferential surface of the inner flat thread disc 31. The inner ring gear 32 meshes with an inner side gear 33 rotatably connected inside the rotating member 23. The rotating member 23 is detachably connected with an inner expanding motor 34 whose output shaft is coaxially and detachably connected to the inner side gear 33. And an electric slip ring is arranged between the rotating member 23 and the sleeve table 51 to supply power to the inner expanding motor 34 and the outer clamping motor 48 during the process of their rotation along with the rotating member 23.

[0038] Since the sleeve of the present application is assembled in two layers, inner and outer, in order to simultaneously machine the radial holes in the inner and outer layers of the sleeve, while using the outer clamping jaws 44 to fix the outer layer of the sleeve, it is also necessary to use the inner expanding blocks 49 to fix the inner layer of the sleeve to prevent relative rotation or movement of the inner and outer layers of the sleeve during the drilling process, so as to ensure that the formed radial holes in the inner and outer layers of the sleeve can be aligned and connected.

[0039] Referring to Figure 2 and Figure 3The moving part 3 of the electric drill body includes a side platform 55 placed on the ground. The upper surface of the side platform 55 is slidably connected to a cylinder seat 56 in the vertical direction. The side platform 55 is detachably connected to a vertical cylinder 57 whose power rod is detachably connected to the cylinder seat 56. The cylinder seat 56 is detachably connected to an axial cylinder 52 whose power rod moving direction is consistent with the axis direction of the rotating member 23. The power rod of the axial cylinder 52 is detachably connected to a middle rod 53. The middle rod 53 can enter the sleeve at one end away from the axial cylinder 52. An end laser sensor 42 is detachably connected to the center of the end face of the middle rod 53 close to the rotating member 23. A positioning hole 43 is provided at the center position of the end face of the rotating member 23 facing the middle rod 53, so that after the vertical cylinder 57 and the axial cylinder 52 send one end of the middle rod 53 into the sleeve along a predetermined path, the center axis of the middle rod 53 can be consistent with the axis of the rotating member 23. In addition, a distance adjusting ring 21 is coaxially mounted on the outer circumferential wall of one end of the middle rod 53 close to the rotating member 23. The distance adjusting ring 21 is evenly and detachably connected with several initial distance laser sensors 5 around its own axis. This embodiment is described by taking two initial distance laser sensors 5 as an example. Each initial distance laser sensor 5 detects the distance between itself and the inner wall of the sleeve. The initial distance laser sensor 5 and the end face laser sensor 42 are electrically connected to the external controller, so that the subsequent drilling operation will be performed only when the distance values ​​detected by all the initial distance laser sensors 5 are equal and the distance value detected by the end face laser sensor 42 is equal to the distance value preset in the external controller.

[0040] Reference Figure 4 , a shaft push rod 59 is coaxially slidably connected inside the middle rod 53, and the shaft push rod 59 can be exposed at one end of the middle rod 53 close to the axial cylinder 52. A radial displacement cylinder 58 is detachably connected to one end of the middle rod 53 close to the axial cylinder 52, and the power rod of the radial displacement cylinder 58 and the circumferential outer wall of the shaft push rod 59 are fixed by a connector. The middle rod 53 can enter the circumferential outer wall of one end of the sleeve and is slidably connected with several radial displacement blocks 54. This embodiment is described by taking two radial displacement blocks 54 as an example. Each radial displacement block 54 moves radially along the middle rod 53, and each radial displacement block 54 is detachably connected to an electric drill body 2 at one end of the middle rod 53 exposed outside. The shaft push rod 59 can abut against all the radial displacement blocks 54, and the surfaces where the shaft push rod 59 and the radial displacement blocks 54 abut are all inclined, so that when the shaft push rod 59 moves toward the rotating member 23, the radial displacement block 54 can move outward from the middle rod 53. In addition, a return spring 41 is provided between the radial displacement block 54 and the inner wall of the middle rod 53, and the return spring 41 forces the radial displacement block 54 to move toward the axis of the middle rod 53, so that the radial displacement block 54 always maintains a close fit with the shaft push rod 59. At the same time, the middle rod 53 is detachably connected with a total distance laser sensor 4 for detecting the end of the middle rod 53 exposed to the shaft push rod 59, and the total distance laser sensor 4 is electrically connected to an external controller.

[0041] When the middle rod 53 enters the shaft sleeve and all initial distance laser sensors 5 and end face laser sensors 42 pass the detection, the radial displacement cylinder 58 starts to operate. Moreover, the position where the electric drill body 2 is located after the middle rod 53 stops moving and before the radial displacement cylinder 58 starts to operate is the initial position. The detection end of the initial distance laser sensor 5 is flush with one end of the drill bit at the initial position of the electric drill body 2, so that the initial distance laser sensor 5 can measure the distance L between the initial position of the electric drill body 2 and the position to be drilled on the shaft sleeve 初 for detection. And the external controller presets the depth of the radial holes to be opened in the shaft sleeve as Z. Then, the distance L between the initial position of the electric drill body 2 and the position of the electric drill body 2 when the drilling is completed 总 =Z + L 初 , so that the external controller can obtain the L during each drilling 总 . After that, according to the correspondence table between the pre-stored L values in the external controller and the values of the shaft push rod 59 总 , the required moving distance L of the shaft push rod 59 during each drilling is obtained 轴 , so that when the moving distance of the shaft push rod 59 detected by the total distance laser sensor 4 is equal to 轴 L, the external controller stops the operation of the radial displacement cylinder 58.

[0042] Refer to Figure 4 , the number of the initial distance laser sensors 5 is the same as that of the electric drill bodies 2. And in the axial direction of the middle rod 53, each initial distance laser sensor 5 is aligned with an electric drill body 2. The initial distance laser sensor 5 is closer to the rotating part 23 than the electric drill body 2. The distance between the initial distance laser sensor 5 and the electric drill body 2 is equal to the distance between two adjacent circles of radial holes to be opened in the shaft sleeve, so that when forming a part of the radial holes in one circle in the shaft sleeve each time, the initial distance laser sensor 5 can measure the L 初 of the corresponding part of the next circle of radial holes. At the same time, the distance adjusting ring 21 is slidably connected to the middle rod 53 along the axial direction of the middle rod 53. A distance adjusting electric cylinder 22 with a power rod detachably connected to the distance adjusting ring 21 is detachably connected inside the middle rod 53, so that when the distance between two adjacent circles of radial holes in different shaft sleeves changes, the distance adjusting ring 21 can move correspondingly to adjust the distance between the initial distance laser sensor 5 and the electric drill body 2.

[0043] Refer to Figure 2 and Figure 3, an end abutting member 35 is installed on each outer clamping jaw 44. The end abutting member 35 includes a fixed rod 36 fixedly connected to the outer clamping jaw 44. The straight line in the length direction of the fixed rod 36 intersects with the axis of the middle rod 53. The minimum distance between the axis of the fixed rod 36 and the axis of the middle rod 53 is greater than the minimum distance between the outer clamping jaw 44 and the axis of the middle rod 53, so as to ensure that the fixed rod 36 does not contact the bushing. A moving rod 37 is slidably connected to the fixed rod 36 along its own length direction. One end of the moving rod 37 far from the axis of the middle rod 53 is slidably connected to the fixed rod 36. The end face of the bushing abuts against the moving rod 37, so as to keep a sufficient distance between the bushing and the rotating member 23, so that when the radial holes of the last few turns of a bushing are formed, the end of the middle rod 53 extending out of the bushing is not likely to abut against the rotating member 23. The fixed rod 36 is rotatably connected with an adjusting lead screw 38 threadedly connected to the moving rod 37. One end of the fixed rod 36 far from the axis of the middle rod 53 is rotatably connected with a rotating block 39 coaxially fixedly connected to the adjusting lead screw 38. The rotating block 39 can be rotated by an internal hexagonal wrench, so that the moving rod 37 can be adapted to abut against the end face of bushings with different inner diameters and wall thicknesses.

[0044] The implementation principle of a bushing drilling device according to an embodiment of the present application is as follows: The bushing is sleeved corresponding to all the inner expansion blocks 49, and then the outer clamping motor 48 and the inner expansion motor 34 run, so that the outer wall of the bushing is fixed by all the outer clamping jaws 44, and the inner wall of the bushing is fixed by all the inner expansion blocks 49. Then the vertical cylinder 57 and the axial cylinder 52 run, so that the middle rod 53 enters the bushing corresponding to the specification of the bushing to be processed. Then the end face laser sensor 42 and all the initial distance laser sensors 5 are detected to ensure that the axis of the middle rod 53 after the movement is consistent with the axis of the bushing, and the L of the first circle of radial holes to be formed 初 is detected and obtained, so that the external controller can obtain the L corresponding to the first circle of radial holes 轴 .

[0045] Then the axial cylinder 52 runs, so that the middle rod 53 moves the distance between two adjacent circles of radial holes to be formed towards the rotating member 23. Then the radial displacement cylinder 58 runs, so that the drill body 2 starts to drill until the total distance laser sensor 4 detects that the moving distance of the shaft push rod 59 is L 轴 At this time, the power rod of the radial displacement cylinder 58 resets, and then the rotating member motor 24 runs so that the rotating member 23 rotates a preset angle to form the next part of the radial holes in the first circle. In addition, during the formation of the first circle of radial holes, the initial distance laser sensor 5 can detect and obtain the L of the second circle of radial holes 初 .

[0046] Then it is continuously repeated until the drilling operation of the last circle of radial holes is completed.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A sleeve drilling device, characterized in that: The invention comprises a sleeve (51), a sleeve portion (1) disposed on the sleeve (51) and clamping and fixing the sleeve, an electric drill body (2) for forming radial holes on the inner wall of the sleeve, an electric drill body moving portion (3) for driving the electric drill body (2) into the sleeve to perform a drilling operation, and a distance L between an initial position of the electric drill body (2) after entering the sleeve and a position of the electric drill body (2) when the electric drill body (2) completes drilling. 总 The total distance laser sensor (4) for controlling the distance L between the initial position of the electric drill body (2) and the position of the shaft sleeve to be drilled 初 The initial distance laser sensor (5) for detection; the drilling depth of the radial hole is defined as Z, then L 总 =Z+L 初 ; The electric drill body moving part (3) comprises a side platform (55), a cylinder seat (56) slidably connected to the side platform (55) and capable of changing height, a vertical cylinder (57) arranged on the side platform (55) to move the cylinder seat (56), an axial cylinder (52) arranged on the cylinder seat (56) and having a power rod that moves along the axis of the sleeve, a middle rod (53) detachably connected to the power rod of the axial cylinder (52), a radial displacement block (54) slidably connected to the middle rod (53) along the radial direction of the sleeve and detachably connected to the electric drill body (2), and a radial displacement cylinder (58) arranged on the middle rod (53) to move the radial displacement block (54), and an initial distance laser sensor (5) is located at one end of the middle rod (53) that enters the sleeve; The radial displacement cylinder (58) power rod is detachably connected to an axial push rod (59) capable of abutting against the radial displacement block (54); the axial push rod (59) is slidably connected to the middle rod (53) along the moving direction of the axial cylinder (52) power rod; the surfaces where the axial push rod (59) and the radial displacement block (54) abut against each other are both inclined surfaces so that the axial push rod (59) can push the radial displacement block (54) to move; a return spring (41) for forcing the radial displacement block (54) to move toward the axis of the middle rod (53) is detachably connected between the radial displacement block (54) and the middle rod (53); the detection end of the total distance laser sensor (4) is aligned with the end of the axial push rod (59) exposed outside the middle rod (53); The clamping part (1) comprises a rotating member (23) rotatably connected to the sleeve platform (51), a rotating member motor (24) disposed on the sleeve platform (51) and causing the rotating member to rotate, a plurality of outer clamping jaws (44) slidably connected to the rotating member (23) and capable of abutting against the outer surface of the shaft sleeve, an outer plane threaded disk (45) rotatably connected to the rotating member (23) and threadedly connected to all the outer clamping jaws (44), an outer ring gear (46) coaxially fixedly connected to the circumferential surface of the outer plane threaded disk (45), an outer gear (47) rotatably connected to the rotating member (23) and meshing with the outer ring gear (46), and an outer clamping motor (48) driving the outer gear (47) to rotate; The rotating member (23) is slidably connected to a plurality of inner expansion blocks (49) capable of abutting against the inner surface of the shaft sleeve; an inner plane threaded disk (31) is rotatably connected inside the rotating member (23) and meshes with all the inner expansion blocks (49); an inner ring gear (32) is coaxially fixedly connected to the circumferential surface of the inner plane threaded disk (31); the inner ring gear (32) meshes with an inner side gear (33) rotatably connected to the rotating member (23); and the rotating member (23) is provided with an inner expansion motor (34) for driving the inner side gear (33) to rotate.

2. A sleeve drilling device according to claim 1, characterized in that: A plurality of radial displacement blocks (54) are evenly arranged around the center line of the middle rod (53), the number of radial displacement blocks (54) is an even number, and each radial displacement block (54) is provided for mounting on an electric drill body (2).

3. A sleeve drilling device according to claim 2, characterized in that: The middle rod (53) is detachably connected to an end surface laser sensor (42) at the center of the end surface of one end of the sleeve, and a positioning hole (43) is provided in the jacket portion (1) at a position corresponding to the axis of the sleeve. A plurality of initial distance laser sensors (5) are evenly arranged around the center line of the middle rod (53).

4. The sleeve drilling device according to claim 1, characterized in that: One initial distance laser sensor (5) is provided corresponding to each electric drill body (2); all initial distance laser sensors (5) are detachably connected to the same distance adjusting ring (21); each distance adjusting ring (21) is slidably connected to the middle rod (53) along the center line of the middle rod (53); a distance adjusting electric cylinder (22) for moving the distance adjusting ring (21) is provided in the middle rod (53); the distance between the electric drill body (2) and the initial distance laser sensor (5) is equal to the distance between two adjacent rows of radial holes in the axial direction of the shaft sleeve.

5. The sleeve drilling device according to claim 1, characterized in that: The outer clamping jaw (44) is fixedly connected to an end abutment piece (35) capable of abutting against an end surface of the shaft sleeve.

6. A sleeve drilling device according to claim 5, characterized in that: The end abutment member (35) comprises a fixed rod (36) fixedly connected to the outer clamping jaw (44), a movable rod (37) slidably connected to the fixed rod (36) along the radial direction of the sleeve and capable of abutting against the end surface of the sleeve, an adjusting screw (38) rotatably connected to the fixed rod (36) and threadedly connected to the movable rod (37), and a rotating block (39) rotatably connected to the fixed rod (36) and coaxially fixedly connected to the adjusting screw (38).

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