Aircraft joint reaming device

Abstract

The invention discloses an aircraft joint reaming device, and relates to the technical field of reaming, the aircraft joint reaming device comprises a main body unit, the main body unit comprises a bottom table, the aircraft joint reaming device further comprises a reaming unit, and the reaming unit is arranged at the top of the bottom table; and the reaming unit comprises a chuck body rotationally arranged at the top of the bottom table, a penetrating pipe is arranged in the middle of the chuck body, a clamping jaw is arranged at the bottom of the chuck body, a hollow pipe is movably arranged in the penetrating pipe, and an annular cavity piece which is inflated and expanded is arranged at the bottom of the hollow pipe. Through the alternate work of the first-stage drill bit, the first-stage reamer, the second-stage drill bit and the second-stage reamer, a stepped hole with a certain depth is formed, and residues of cutting fluid containing chippings in the stepped hole are reduced in the rotating and up-and-down movement of the annular cavity piece; and the stability of drilling and reaming is improved under the cooperation of the inflation axial buffering of the annular cavity piece and the radial buffering of the cross-shaped vertical rod and the buffering piece.

Description

Technical Field

[0001] The invention relates to the technical field of reaming holes, and in particular to a reaming hole device for aircraft joints. Background Art

[0002] Before the accessories of small manned aircraft are connected and installed, the surface of the accessory plate needs to be pre-processed, and the installation holes are formed by pre-drilling and then reaming. The installation holes are formed by a stepped hole method, that is, the bottom hole is first opened and then the top of the bottom hole is expanded to form a stepped hole, thereby improving the connection strength of the aircraft joint.

[0003] Chinese invention patent CN110434402A discloses a device for reaming holes of a butt joint of an aircraft tail, comprising a base plate, a support seat being fixedly connected to the top of the base plate, a fixed plate being fixedly connected to the top of the support seat, rectangular boxes being fixedly connected to both sides of the top of the support seat and located on the front of the fixed plate, a sliding plate being slidably connected to the front of the fixed plate, and a mounting plate being fixedly connected to the front of the sliding plate, a first motor being fixedly connected to the top of the mounting plate, and a fixed block being fixedly connected to one end of the output shaft of the first motor, the bottom of the fixed block passing through the mounting plate and extending to the bottom of the mounting plate, and the bottom of the fixed block being fixedly connected to the mounting block.

[0004] The above patents and prior art have the following problems: Most of the stepped holes in thick plates that need to be processed in existing manned aircraft are deep stepped holes with large strokes, and existing stepped hole drills are only suitable for thin plates. Therefore, when the manned aircraft plates are reamed to form stepped holes, due to the influence of the depth, the cutting fluid mixed with debris inside the stepped hole is not easy to discharge, especially when the bottom hole of the stepped hole is processed and the tool is changed to expand the hole to form a stepped hole, the cutting fluid of the expanded hole cutting will more easily enter the bottom hole of the stepped hole to form chip blockage. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: An aircraft joint reaming device comprises: a main body unit, the main body unit comprises a base, the top of the base is rotatably provided with a primary drill bit, a primary reamer, a secondary drill bit and a secondary reamer, and further comprises: A reaming unit, wherein the reaming unit is arranged on the top of the base; The reaming unit includes a chuck body rotatably arranged on the top of the base, a through tube is arranged in the middle of the chuck body, a clamping claw is arranged at the bottom of the chuck body, a hollow tube is movably arranged inside the through tube, an inflatable annular cavity is arranged at the bottom of the hollow tube, and the annular cavity for damping vibration and assisting chip removal is arranged inside the stepped hole.

[0007] As a preferred solution of the aircraft joint reaming device of the present invention, wherein: the main unit further comprises a processing surface, the processing surface is installed at the middle top of the base, the main arm is installed at the side top of the base, and the top surface of the processing surface is provided with a plate; A drill bit rotation source is installed on the top surface of the base, and the output shaft of the drill bit rotation source movably passes through the processing surface and is fixedly connected to the bottom panel. A cross vertical rod is fixedly connected to the top of the bottom panel, and an inner cross cylinder is movably sleeved on the surface of the cross vertical rod; The surface of the cross vertical rod is sleeved with an elastic member, which is arranged between the bottom panel and the inner cross cylinder. A buffer is installed on the top of the outer plate of the bottom panel, and the top of the buffer is fixedly connected to the outer plate of the bottom of the inner cross cylinder.

[0008] As a preferred solution of the aircraft joint reaming device of the present invention, wherein: the surface of the inner cross cylinder is provided with four extended arm plates along its circumferential direction, the outer side of the extended arm plate is movably connected with the rotating member through the mounting groove on its surface, the surface of the rotating member is provided with a clamping plate, and the center of the clamping plate is symmetrically provided with a threaded block; A mounting hole is opened at the center of the line connecting the symmetrically arranged threaded blocks corresponding to the position on the surface of the clamping plate. The mounting hole passes through the clamping plate, the rotating part and the extended arm plate in sequence. The outer sides of the four extended arm plates are respectively installed through the mounting hole and the first-level drill bit, the first-level reamer, the second-level drill bit and the second-level reamer, and are rotated and tightened with bolts inside the threaded block.

[0009] As a preferred solution of the aircraft joint reaming device of the present invention, wherein: a nozzle is installed at the bottom of the outer side of the extended arm plate; A top hole is provided at the top of the first-stage drill bit, a through slot one is provided downwardly through the middle of the first-stage reamer, a through slot two is provided downwardly through the middle of the second-stage drill bit, a through slot three is provided downwardly through the middle of the second-stage reamer, and a diameter of the through slot two is smaller than an outer diameter of the first-stage reamer.

[0010] As a preferred solution of the aircraft joint reaming device of the present invention, wherein: an inner plate is installed inside the main arm, a height control source is installed on the top of the inner plate, a screw rod is rotatably arranged between the inner plate and the bottom surface inside the main arm, auxiliary rods are symmetrically arranged on the outside of the screw rod, and movable seats are movably arranged on the surfaces of the screw rod and the auxiliary rod; A drilling drive source is installed on the surface of the movable seat located inside the main arm, and the output shaft of the drilling drive source passes through the movable seat and is movably connected to the active component. A vertical opening is set on the surface of the main arm, and the part of the movable seat passing through the vertical opening is fixedly connected to the installation cavity.

[0011] As a preferred solution of the aircraft joint reaming device described in the present invention, the bottom of the installation cavity is fixedly connected with an inner ring plate, the inner ring plate is rotatably clamped with a retaining ring groove, the bottom of the retaining ring groove is fixedly connected with a follower, the active member is connected to the driven member through a transmission member, and the bottom of the follower is fixedly connected with a chuck body.

[0012] As a preferred solution of the aircraft joint reaming device of the present invention, wherein: a push-clamp power source is fixedly connected inside the installation cavity, and an output shaft of the push-clamp power source movably passes through the installation cavity and is fixedly connected to the clamp; A back plate is fixedly connected to the top of the installation cavity, and an up-and-down pushing source is fixedly connected to the surface of the back plate.

[0013] As a preferred solution of the aircraft joint reaming device of the present invention, wherein: the bottom of the output shaft of the upper and lower pushing sources is fixedly connected with a connecting block, the output shaft of the upper and lower pushing sources is fixedly connected with the top of the inner hole rotation source through the connecting block, the output shaft of the inner hole rotation source is fixedly connected with an upper circular plate, and the upper circular plate is fixedly connected with the lower circular plate through a semicircular tube; The bottom of the lower circular plate is fixedly connected with a hollow tube, the inner side of the lower circular plate is fixedly connected to the lower limiting circular plate through a semicircular tube extending through the hollow tube, and the part of the semicircular tube located inside the hollow tube is fixedly connected to the inner wall of the hollow tube.

[0014] As a preferred solution of the aircraft joint reaming device of the present invention, wherein: an upper limiting circular plate is provided at the top of the lower limiting circular plate corresponding to the surface of the hollow tube, an annular cavity is installed between the upper limiting circular plate and the lower limiting circular plate, and the inner side of the annular cavity is fixedly connected to the surface of the semicircular tube; An air guide tube is provided at the top of the annular cavity, the air guide tube passes through the semicircular tube and is connected to the inflation drive source, a pumping tube is provided in the middle of the hollow tube, the pumping tube is connected to the pumping port at the bottom end of the middle of the hollow tube, and the top of the pumping tube is connected to the pumping drive source; The annular cavity is made of rubber material and a silicon carbide coating is adhered to its surface.

[0015] As a preferred solution of the aircraft joint reaming device of the present invention, wherein: a spiral disk is rotatably arranged inside the chuck body, a bevel gear ring is arranged on the outer ring of the top of the spiral disk, a bevel gear ring is meshedly connected with the top of the bevel gear ring, and the bevel gear is fixedly connected to the output shaft of the clamping drive source; The clamping drive source is fixedly installed inside the chuck body, the bottom surface of the spiral disk is provided with a threaded surface, the surface of the threaded surface is engaged with the thread on the top of the clamping claw through a thread, and the clamping claw is movably engaged with the bottom of the chuck body.

[0016] Beneficial effects of the present invention: 1. Through the alternating operation of the first-level drill, the first-level reamer, the second-level drill and the second-level reamer, a stepped hole of a certain depth is formed, and during the rotation and up and down movement of the ring cavity, the residual cutting fluid containing chips inside the stepped hole is reduced, and the stability of drilling and reaming is improved through the pneumatic axial buffer of the ring cavity and the radial buffer cooperation of the cross rod and the buffer.

[0017] Second, when the first-stage drill bit is punching a hole in the plate, if axial vibration is generated, the inflated annular cavity inside the top hole will buffer the axial vibration deviation of the first-stage drill bit. When the first-stage drill bit generates radial vibration during drilling, it will be buffered by the elastic parts and buffer parts at the bottom of the inner cross cylinder. Thus, the lateral buffering of the inflated annular cavity and the radial buffering of the elastic parts and buffer parts can buffer the eccentric vibration generated during the drilling and reaming process, thereby improving the stability of drilling and reaming.

[0018] 3. During the reaming process of the primary reamer, the upper and lower driving sources push the hollow tube through the tube into the inside of the through slot one, so that the primary reamer rotates around the hollow tube, and after the hollow tube enters the inside of the through slot one, the annular cavity is quantitatively inflated, so that a gap exists between the inflated annular cavity and the through slot one, so that when the primary reamer produces axial runout, the annular cavity will buffer the axial runout of the primary reamer, and when the axial runout of the primary reamer is too large, the drilling drive source and the lower limiting circular plate at the bottom of the movable seat play a role of rigid support, thereby limiting the problem of excessive axial runout during the reaming process.

[0019] Fourth, when the hollow tube enters the bottom end of the through slot, the pumping drive source will be started, so that the pumping drive source generates suction to the bottom of the semicircular tube through the pumping tube, so that the cutting fluid sprayed from the nozzle of the first-level drill and the first-level reamer to the inside of the stepped hole during operation is extracted, thereby reducing the residual cutting fluid containing cutting debris at the bottom of the stepped hole.

[0020] 5. In order to prevent the debris after hole expansion from falling into the original reaming hole, before the secondary drill bit drills, the upper and lower pushing sources control the movable seat to move downward, and pass through the through-tube into the inside of the through-slot 2, and then the upper limiting circular plate and the lower limiting circular plate at the bottom of the through-tube pass through the through-slot 2 and enter the inside of the originally drilled hole, and then the annular cavity is inflated by the inflation driving source, so that the annular cavity contacts the inner wall of the originally reamed hole, that is, contacts the inner wall of the bottom hole of the stepped hole, which is collectively referred to as the bottom hole below, so that when the secondary drill bit produces axial runout, the annular cavity at the bottom of the hollow tube squeezes and buffers the originally reamed hole. Of course, at this time, the bottom hole has been filled and sealed by the annular cavity, thereby reducing the drilling process of the secondary drill bit, and the cutting fluid drives the debris to accumulate inside the bottom hole, thereby reducing the problem of the cutting fluid being difficult to discharge inside the deep hole formed by the stepped hole.

[0021] 6. Intermittently make the upper and lower driving sources drive the movable seat and the ring cavity to move up and down inside the bottom hole, so that the grinding coating on the surface of the ring cavity grinds the inner wall of the bottom hole up and down, further improving the surface quality of the bottom hole in the stepped hole, and the downward movement of the ring cavity can make part of the cutting fluid enter the bottom hole and be located at the top of the ring cavity, and then the upward movement of the ring cavity will drive the cutting fluid on the top of the ring cavity to impact the surface of the secondary drill bit, so that the cutting fluid is discharged from the stepped hole along the gap between the spiral blades on the surface of the secondary drill bit, thereby avoiding the accumulation of cutting fluid and reducing the risk of chip blockage , and during the lifting process of the ring cavity part, the nozzle stops working to reduce the relative obstruction formed in the direction of outputting the cutting fluid between the two. During the lifting process of the ring cavity part, the inner hole rotation source can also be started to make the inner hole rotation source drive the hollow tube and the ring cavity part to rotate, so that the ring cavity part rotates up and down inside the bottom hole, thereby further improving the surface quality of the bottom hole of the stepped hole. At this time, the pumping port is located at the bottom of the ring cavity part, and the cutting fluid is extracted under the control of the pumping drive source, further avoiding the cutting fluid from flowing into the bottom of the stepped hole. During this process, the chuck always presses down to limit the plate.

[0022] 7. When the secondary reamer has completed reaming, the height control source drives the installation cavity and the secondary reamer to lift. In the process of lifting the secondary reamer, the upper and lower pushing sources control the movable seat to lift as well. In the process of lifting the movable seat, the annular cavity expands under the inflation of the inflation drive source and contacts the inner wall of the reaming hole of the secondary reamer. Therefore, in the lifting of the movable seat, the annular cavity contacting the inner wall of the reaming hole of the secondary reamer will scrape the chips inside the reaming hole processed by the secondary reamer and bring them out, thereby improving the cleanliness of the inside of the reaming hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the following is a brief introduction to the drawings required for describing the embodiment, wherein: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a side schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the present invention from a top perspective after the main arm is removed; Figure 4 This is a bottom perspective schematic diagram of the present invention after the base is removed; Figure 5 for Figure 1 A schematic diagram of the enlarged structure of part A; Figure 6 for Figure 1 A schematic diagram of the enlarged structure of part B; Figure 7 for Figure 3 A schematic diagram of the enlarged structure of the middle C part; Figure 8 This is a schematic diagram of the internal structure connection of the installation cavity of the present invention; Fig. 9 This is a schematic diagram of the connection between the interior of the chuck body and the hollow tube of the present invention; Fig.10 for Fig. 9 A schematic diagram of the enlarged structure of the D part; Fig.11 This is a schematic diagram of the internal structure connection of the chuck body of the present invention; Fig.12 This is a schematic diagram of the internal structure connection of the main arm of the present invention; Fig.13 This is a schematic diagram of the connection of the bottom structure of the up and down push source of the present invention; Fig.14 This is a schematic diagram of the internal structure connection of the hollow tube of the present invention; Fig.15 for Fig.14 A schematic diagram of the enlarged structure of part E in the middle; Fig.16 This is a schematic diagram of the hollow tube from the top perspective of the present invention; Fig.17 It is a schematic diagram of the processing status of the stepped hole, the secondary reamer and the ring cavity part of the present invention.

[0024] In the figure: 1. Main unit; 101. Base; 1011. Processing surface; 102. Main arm; 1021. Inner plate; 103. Drill bit rotation source; 1031. Bottom plate; 1032. Cross vertical rod; 1033. Inner cross cylinder; 10331. Extended arm plate; 1034. Elastic member; 1035. Rotating member; 1036. Clamping plate; 1037. Thread block; 1038. Buffer member; 104. Primary drill bit; 1041. Top hole; 105. Primary reamer; 1051. Through slot one; 106. Secondary drill bit; 1061. Through slot two; 107. Secondary reamer; 1071. Through slot three; 108. Sprinkler; 2. Reaming unit; 201. Mounting cavity; 2011. Push-clamp power source; 2012. Clamp; 2013. Back plate; 202. Up and down push source; 2021. Connecting block; 2022. Inner hole rotation source; 2023. Upper circular plate; 2024. Lower circular plate; 20241. Inflatable drive source; 20242. Twitching drive source; 2025. Hollow tube; 20251. Upper limiting circular plate; 20252. Semicircular tube; 20253. Lower limiting circular plate; 2026. Twitching tube; 20261. Twitching port; 2027. Air guide tube; 2 03, inner ring plate; 2031, transmission part; 204, chuck body; 2041, through pipe; 20411, snap ring groove; 20412, driven part; 2042, clamping drive source; 20421, bevel gear; 2043, spiral disk; 20431, bevel gear ring; 20432, threaded surface; 20433, claw; 2044, counterweight; 205, height control source; 2051, screw rod; 2052, movable seat; 20521, drilling drive source; 20522, active part; 2053, auxiliary rod; 206, ring cavity part; 3. Plate material; 301, stepped hole. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1: This embodiment Figure 1-17 As shown, an aircraft joint reaming device comprises: a main unit 1, the main unit 1 comprises a base 101, the top of the base 101 is rotatably provided with a primary drill bit 104, a primary reamer 105, a secondary drill bit 106 and a secondary reamer 107, and further comprises: A reaming unit 2, wherein the reaming unit 2 is disposed on the top of the base 101; The reaming unit 2 includes a chuck body 204 rotatably arranged on the top of the base 101, a through tube 2041 is arranged in the middle of the chuck body 204, a claw 20433 is arranged at the bottom of the chuck body 204, a hollow tube 2025 is movably arranged inside the through tube 2041, an inflatable annular cavity 206 is arranged at the bottom of the hollow tube 2025, and the annular cavity 206 for damping vibration and assisting chip removal is arranged inside the stepped hole 301.

[0027] like Figure 1-5 As shown, the main unit 1 further includes a processing surface 1011, which is installed at the middle top of the base 101, the main arm 102 is installed at the side top of the base 101, and the top surface of the processing surface 1011 is provided with a plate 3; A drill bit rotation source 103 is installed on the top surface of the base 101, and the output shaft of the drill bit rotation source 103 movably passes through the processing surface 1011 and is fixedly connected to the bottom panel 1031. The drill bit rotation source 103 is preferably a servo motor controlled by a PLC and an encoder. A cross vertical rod 1032 is fixedly connected to the top of the bottom panel 1031, and an inner cross cylinder 1033 is movably sleeved on the surface of the cross vertical rod 1032; The surface of the cross rod 1032 is sleeved with an elastic member 1034, and the elastic member 1034 is arranged between the bottom panel 1031 and the inner cross tube 1033. A buffer member 1038 is installed on the top of the outer plate of the bottom panel 1031, and the top of the buffer member 1038 is fixedly connected to the outer plate of the bottom of the inner cross tube 1033. The cross rod 1032 is preferably a spring, and the buffer member 1038 is preferably a damper.

[0028] like Figure 3-5 As shown, the surface of the inner cross cylinder 1033 is provided with four extension arm plates 10331 along its circumferential direction, the outer side of the extension arm plate 10331 is movably connected with the rotating member 1035 through the mounting groove on its surface, the surface of the rotating member 1035 is provided with a clamping plate 1036, the center of the clamping plate 1036 is symmetrically provided with a threaded block 1037, the rotating member 1035 is preferably a bearing, the outer ring of the bearing is fixedly connected to the inner side wall of the mounting groove, the top of the inner ring of the bearing is fixedly connected with the clamping plate 1036, so that the clamping plate 1036 rotates relative to the extension arm plate 10331; A mounting hole is provided at the center of the line connecting the symmetrically arranged threaded blocks 1037 corresponding to the position on the surface of the clamping plate 1036, and the mounting hole passes through the clamping plate 1036, the rotating member 1035 and the extended arm plate 10331 in sequence. The outer sides of the four extended arm plates 10331 are respectively installed through the mounting holes and the primary drill bit 104, the primary reamer 105, the secondary drill bit 106 and the secondary reamer 107, and are rotated and tightened with the bolts inside the threaded block 1037, so that the bolts on the outer side of the symmetrical rotating threaded block 1037 are rotated and passed through the threaded block 1037, so that after the bolts pass through the threaded block 1037, they are respectively pressed and fixed against the surfaces of the primary drill bit 104, the primary reamer 105, the secondary drill bit 106 and the secondary reamer 107.

[0029] like Figure 3-4 As shown, a nozzle 108 is installed at the bottom of the outer side of the extension arm plate 10331, and the nozzle 108 is connected to the cutting fluid storage tank through an external water pipe, and a water pump and a valve are installed in the middle of the external water pipe, so that the water pump inputs the cutting fluid to the nozzle 108 through the valve, and the nozzle 108 sprays it out to reduce the friction of reaming and drilling; The top of the primary drill bit 104 is provided with a top hole 1041, the middle of the primary reamer 105 is provided with a through slot 1 1051 penetrating downwardly, the middle of the secondary drill bit 106 is provided with a through slot 2 1061 penetrating downwardly, the middle of the secondary reamer 107 is provided with a through slot 3 1071 penetrating downwardly, the diameter of the through slot 2 1061 is smaller than the outer diameter of the primary reamer 105, and the bottom of the secondary drill bit 106 excluding the through slot 2 1061 is provided with a cutting edge, so that the secondary drill bit 106 can expand the bottom hole after the primary reamer 105 is reamed through the cutting edge at its bottom to form a step. Hole 301, it should be noted that the outer diameters of the primary drill bit 104 and the primary reamer 105 are the same, the outer diameters of the secondary drill bit 106 and the secondary reamer 107 are the same, the outer diameters of the secondary drill bit 106 and the secondary reamer 107 are larger than the outer diameters of the primary drill bit 104 and the primary reamer 105, the diameters of the upper limiting circular plate 20251 and the lower limiting circular plate 20253 are smaller than the diameters of the top hole 1041, the through slot 1 1051, the through slot 2 1061 and the through slot 3 1071, and when the annular cavity 206 is not inflated, it shrinks to the internal area between the upper limiting circular plate 20251 and the lower limiting circular plate 20253.

[0030] like Figure 3-5As shown, an inner plate 1021 is installed inside the main arm 102, and a height control source 205 is installed on the top of the inner plate 1021. The height control source 205 is preferably a three-phase asynchronous reduction motor controlled by a PLC and an encoder. A screw 2051 is rotatably arranged between the inner plate 1021 and the bottom surface inside the main arm 102, and auxiliary rods 2053 are symmetrically arranged on the outside of the screw 2051. The auxiliary rod 2053 is fixedly arranged inside the main arm 102, and a movable seat 2052 is movably arranged on the surface of the screw 2051 and the auxiliary rod 2053. The screw 2051 is preferably a ball screw, and the movable seat 2052 is preferably a ball screw nut seat; The movable seat 2052 is located on the surface of the inner part of the main arm 102 and is installed with a drilling drive source 20521. The output shaft of the drilling drive source 20521 passes through the movable seat 2052 and is movably connected with the active part 20522. A vertical opening is set on the surface of the main arm 102, and the part of the movable seat 2052 passing through the vertical opening is fixedly connected to the installation cavity 201.

[0031] like Figure 6-12 As shown, the bottom of the mounting cavity 201 is fixedly connected with an inner ring plate 203, the inner part of the inner ring plate 203 is rotatably clamped with a retaining ring groove 20411, the bottom of the retaining ring groove 20411 is fixedly connected with a follower 20412, the active member 20522 is connected to the driven member 20412 through the transmission member 2031, the screw 2051 is arranged inside the transmission member 2031 and does not contact it, the active member 20522 and the driven member 20412 are preferably pulleys, the transmission member 2031 is preferably a belt, or the active member 20522 and the driven member 20412 are preferably sprockets, the transmission member 2031 is preferably a chain, and the bottom of the driven member 20412 is fixedly connected with a chuck body 204.

[0032] like Figure 8-9 As shown, a push-clamp power source 2011 is fixedly connected inside the installation cavity 201, and the output shaft of the push-clamp power source 2011 movably passes through the installation cavity 201 and is fixedly connected to the clamp 2012; A back plate 2013 is fixedly connected to the top of the installation cavity 201, and an up and down push source 202 is fixedly connected to the surface of the back plate 2013. The push-clamp power source 2011 and the up and down push source 202 are preferably PLC-controlled cylinders or electric telescopic cylinders.

[0033] like Figure 10-11As shown, the chuck body 204 is provided with a spiral disk 2043 for rotation inside, and the outer ring of the top of the spiral disk 2043 is provided with a bevel gear ring 20431, and the top of the bevel gear ring 20431 is meshed with a bevel gear 20421, and the bevel gear 20421 is fixedly connected to the output shaft of the clamping drive source 2042, and the clamping drive source 2042 is fixedly installed inside the chuck body 204 and does not rotate synchronously with the spiral disk 2043. A counterweight block 2044 having the same weight as the clamping drive source 2042 and the bevel gear 20421 is arranged inside 4 at a symmetrical position with the clamping drive source 2042, a threaded surface 20432 is arranged on the bottom surface of the spiral disk 2043, and the surface of the threaded surface 20432 is engaged with the thread on the top of the claw 20433 through a thread, and the claw 20433 is movably engaged with the bottom of the chuck body 204, and the internal structure of the chuck body 204 is the same as that of the three-jaw chuck.

[0034] Operation process: The plate 3 to be processed is placed on the surface of the processing surface 1011, and the height control source 205 is started, so that the height control source 205 drives the screw 2051 to rotate, so that the screw 2051 drives the movable seat 2052 on the surface of the screw 2051 to move downward when rotating. At this time, the drill bit rotation source 103 rotates, so that the drill bit rotation source 103 drives the bottom plate 1031, the cross vertical rod 1032, the inner cross cylinder 1033 and the primary drill 104 outside the extension arm plate 10331 to rotate to the bottom of the movable seat 2052 corresponding to the chuck body 204. Then, when the installation cavity 201 continues to move downward, the through tube 2041 in the chuck body 204 is sleeved onto the outer side of the top of the first-stage drill bit 104, and then the clamping drive source 2042 drives the bevel gear 20421 to rotate, so that the bevel gear 20421 drives the bevel gear ring 20431 and the spiral disk 2043 to rotate, so that the spiral disk 2043 drives the claw 20433 to move inward through the threaded surface 20432, so that the claw 20433 clamps the top of the first-stage drill bit 104 inside the through tube 2041, thereby completing the installation of the first-stage drill bit 104.

[0035] When the first-stage drill bit 104 is installed, the height control source 205 continues to drive the screw rod 2051 to rotate, thereby driving the chuck body 204 and the first-stage drill bit 104 to move downward. During the downward movement of the first-stage drill bit 104, the inner cross cylinder 1033 is driven to move downward through the extension arm plate 10331, so that the elastic member 1034 and the buffer member 1038 are compressed during the downward movement of the inner cross cylinder 1033. Then, during the downward movement of the first-stage drill bit 104, the drilling drive source 20521 is synchronously started, so that the drilling drive source 20521 drives the active member 20 522 rotates, so that the active member 20522 drives the driven member 20412 and the snap ring groove 20411 to rotate accordingly, so that the snap ring groove 20411 rotates inside the inner ring plate 203, thereby driving the chuck body 204 to rotate, and then the chuck body 204 drives the clamped primary drill 104 to rotate through the claws 20433, so that the rotating primary drill 104 is driven by the movable seat 2052 to approach the plate 3, so that the primary drill 104 punches the plate 3 once, thereby forming the bottom hole of the stepped hole 301; Before the installation cavity 201 moves downward, the push-clamp power source 2011 is started in advance, so that the output shaft of the push-clamp power source 2011 moves downward, and the chuck 2012 at the bottom of the push-clamp power source 2011 is pressed down to the surface of the plate 3, and during the downward movement of the installation cavity 201 and the first-level drill bit 104, the output shaft extended by the push-clamp power source 2011 gradually retracts, so that the speed at which the installation cavity 201 drives the first-level drill bit 104 to descend is consistent with the speed at which the output shaft of the push-clamp power source 2011 retracts, so that when the first-level drill bit 104 moves downward for drilling, the chuck 2012 always presses down the plate 3 to contact the processing surface 1011, thereby maintaining the stability of the plate 3 during the drilling process.

[0036] Embodiment 2: This embodiment is different from the first embodiment in that: like Figure 8-12 and Figure 13-16 As shown, the bottom of the output shaft of the up-down pushing source 202 is fixedly connected with a connecting block 2021, and the output shaft of the up-down pushing source 202 is fixedly connected to the top of the inner hole rotation source 2022 through the connecting block 2021. The inner hole rotation source 2022 is preferably a servo motor controlled by a PLC and an encoder. The output shaft of the inner hole rotation source 2022 is fixedly connected with an upper circular plate 2023, and the upper circular plate 2023 is fixedly connected to the lower circular plate 2024 through a semicircular tube 20252; The bottom of the lower circular plate 2024 is fixedly connected with a hollow tube 2025, the inner side of the lower circular plate 2024 extends through a semicircular tube 20252 and is fixedly connected to the hollow tube 2025 and the lower limiting circular plate 20253, and the part of the semicircular tube 20252 located inside the hollow tube 2025 is fixedly connected to the inner wall of the hollow tube 2025.

[0037] like Figure 13-16 As shown, an upper limiting circular plate 20251 is provided at the top of the lower limiting circular plate 20253 corresponding to the surface of the hollow tube 2025, and an annular cavity 206 is installed between the upper limiting circular plate 20251 and the lower limiting circular plate 20253, and the inner side of the annular cavity 206 is fixedly connected to the surface of the semicircular tube 20252; The top of the annular cavity 206 is provided with an air guide tube 2027, and the air guide tube 2027 passes through the semicircular tube 20252 and is connected to the inflation drive source 20241, and the inflation drive source 20241 is preferably an air pump controlled by PLC. The middle of the hollow tube 2025 is provided with a pumping tube 2026, and the pumping tube 2026 is conductively connected to the pumping port 20261 at the bottom end of the middle of the hollow tube 2025, and the top of the pumping tube 2026 is conductively connected to the pumping drive source 20242, and the pumping drive source 20242 is preferably a water pump controlled by PLC. The annular cavity member 206 is made of rubber material and has a silicon carbide coating adhered to its surface. The coating formed by silicon carbide particles is adhered to the surface of the annular cavity member 206 through a high-temperature vulcanization process.

[0038] The rest of the structure is the same as that of the first embodiment.

[0039] Operation process: Before the primary drill bit 104 moves down to drill a hole, the up-down driving source 202 is activated, so that the up-down driving source 202 drives the inner hole rotation source 2022, the hollow tube 2025 and the annular cavity 206 to move down, so that the upper limiting circular plate 20251, the lower limiting circular plate 20253 and the annular cavity 206 pass through the through-tube 2041 and enter the interior of the top hole 1041, and the inflation driving source 20241 inflates the annular cavity 206, so that the annular cavity 206 is inflated and expanded to fill the interior of the top hole 1041, and then when the primary drill bit 104 punches a hole in the plate 3, When axial vibration occurs, the inflated annular cavity 206 inside the top hole 1041 will buffer the axial vibration deviation of the primary drill bit 104, and when the primary drill bit 104 generates radial vibration in the drill hole, it will be buffered by the elastic member 1034 and the buffer member 1038 at the bottom of the inner cross cylinder 1033, so that the lateral buffering of the inflated annular cavity 206 and the radial buffering of the elastic member 1034 and the buffer member 1038 can buffer the deflection vibration generated during the drilling and reaming process, thereby improving the stability of the drilling and reaming; When the primary drill bit 104 completes drilling, the drilling drive source 20521 stops, and the annular cavity member 206 is deflated under the control of the inflation drive source 20241. The annular cavity member 206 drives the hollow tube 2025 to rise along with the up and down push source 202. At this time, the mounting cavity 201 and the chuck body 204 also rise synchronously, so that the compression state of the elastic member 1034 and the buffer member 1038 is released, and then the clamping drive source 2042 is reversed, so that the claw 20433 is restored and released. The first-stage drill bit 104 is clamped, and after the clamping of the first-stage drill bit 104 is released, the installation cavity 201 and the chuck body 204 continue to rise, so that the clamping claw 20433 does not contact the first-stage drill bit 104. In this process, the clamping power source 2011 will also push out the output shaft at the same speed as the installation cavity 201 rises, so that the chuck 2012 always maintains the downward pressure on the plate 3. When the clamping claw 20433 is away from the first-stage drill bit 104, the drill bit rotation source 103 drives the bottom plate 1031 , the cross rod 1032 and the inner cross cylinder 1033 rotate, so that the primary reamer 105 connected to the outer extension arm plate 10331 outside the inner cross cylinder 1033 rotates to the bottom of the through-tube 2041. When the primary reamer 105 is located at the bottom of the through-tube 2041 and corresponds thereto, the height control source 205 drives the installation cavity 201 to move downward, so that the through-tube 2041 is sleeved on the top of the primary reamer 105, so that the claw 20433 at the bottom of the through-tube 2041 is clamped on the driving source. Under the rotation of the gear 2042 and the bevel gear 20421, the top of the primary reamer 105 is clamped, and then the drilling drive source 20521 is started to drive the chuck body 204 to rotate, so that the primary reamer 105 clamped by the claws 20433 at the bottom of the chuck body 204 rotates accordingly, so that the installation cavity 201 continues to descend, so that the primary reamer 105 enters the hole processed by the primary drill bit 104, and the primary reamer 105 reams the drill hole, thereby improving the internal accuracy of the drill hole; During the reaming process of the primary reamer 105, the upper and lower driving sources 202 drive the hollow tube 2025 through the through tube 2041 into the interior of the through slot 1051, so that the primary reamer 105 rotates around the hollow tube 2025, and after the hollow tube 2025 enters the interior of the through slot 1051, the annular cavity 206 is quantitatively inflated, so that there is a gap between the inflated annular cavity 206 and the through slot 1051, so that when the primary reamer 105 generates axial runout, the annular cavity 206 will buffer the axial runout of the primary reamer 105, and when the axial runout of the primary reamer 105 is too large, the drilling drive source 20521 and the lower limiting circular plate 20253 at the bottom of the movable seat 2052 play a role of rigid support, thereby limiting the problem of excessive axial runout during the reaming process; When the hollow tube 2025 enters the bottom end of the through slot 1051, the pumping drive source 20242 is activated, so that the pumping drive source 20242 generates suction to the bottom of the semicircular tube 20252 through the pumping tube 2026, so that the cutting fluid sprayed by the nozzle 108 to the inside of the stepped hole 301 during the operation of the first-level drill 104 and the first-level reamer 105 is extracted, thereby reducing the residual cutting fluid containing the cutting chips at the bottom of the stepped hole 301. In this process, the chuck 2012 always presses down to limit the plate 3. When the primary reamer 105 has completed reaming, the drilling drive source 20521 is stopped, and the annular cavity member 206 is deflated under the control of the inflation drive source 20241. The annular cavity member 206 drives the hollow tube 2025 to rise along with the up and down push source 202. At this time, the mounting cavity 201 and the chuck body 204 also rise synchronously. Then, the clamping drive source 2042 is reversed, so that the clamping claw 20433 releases the clamping of the primary reamer 105, and the clamping claw 20433 rises away from the primary reamer 105 along with the mounting cavity 201. Then, the drill bit rotation source 103 is rotated to make the secondary drill bit 106 move to the bottom of the penetration tube 2041 corresponding thereto, so that the height control source 205 drives the installation cavity 201 to move downward. When the penetration tube 2041 is sleeved on the top of the secondary drill bit 106, the claw 20433 at the bottom of the penetration tube 2041 clamps the top of the secondary drill bit 106 under the control of the clamping drive source 2042, so that the chuck body 204 and the secondary drill bit 106 rotate accordingly under the drive of the drilling drive source 20521; The secondary drill bit 106 is made to perform secondary expansion on the hole opened by the primary reamer 105 and the primary drill bit 104 as the installation cavity 201 descends, so as to form a stepped hole 301. When the secondary drill bit 106 is made to perform rotary drilling as the installation cavity 201 descends, a stepped hole 301 is formed on the surface of the plate 3. During this process, the chuck 2012 always presses down to restrict the plate 3. In order to prevent the debris after the hole is expanded from falling into the original hole, before the secondary drill bit 106 starts drilling, the upper and lower driving sources 202 control the movable seat 2052 to move downward, and enter the second through slot 1061 through the through pipe 2041, so that the upper limiting circular plate 20251 and the lower limiting circular plate 20253 at the bottom of the through pipe 2041 pass through the second through slot 1061 and enter the original hole, and then the annular cavity 206 is inflated by the inflation driving source 20241, so that the annular cavity 206 is inflated. 6 is in contact with the inner wall of the original reaming hole, that is, in contact with the inner wall of the bottom hole of the stepped hole 301, which is collectively referred to as the bottom hole below, so that when the secondary drill bit 106 produces axial runout, the annular cavity 206 at the bottom of the hollow tube 2025 is squeezed and buffered toward the original reaming hole. Of course, at this time, the bottom hole has been filled and sealed by the annular cavity 206, thereby reducing the secondary drill bit 106 drilling process, and the cutting fluid drives the debris to accumulate inside the bottom hole, thereby reducing the problem of the cutting fluid being difficult to discharge from the deep hole formed by the stepped hole 301; The up and down driving source 202 is intermittently driven to drive the movable seat 2052 and the ring cavity 206 to move up and down inside the bottom hole, so that the grinding coating on the surface of the ring cavity 206 grinds the inner wall of the bottom hole up and down, further improving the surface quality of the bottom hole in the stepped hole 301, and the downward movement of the ring cavity 206 can allow part of the cutting fluid to enter the inside of the bottom hole and be located at the top of the ring cavity 206, and then the upward movement of the ring cavity 206 will drive the cutting fluid on the top of the ring cavity 206 to impact the surface of the secondary drill bit 106, so that the cutting fluid is discharged from the stepped hole 301 along the gap between the spiral blades on the surface of the secondary drill bit 106, thereby avoiding the accumulation of cutting fluid and reducing the risk of chip blockage, and the ring cavity 20 6, the nozzle 108 stops working to reduce the relative obstruction formed in the direction of outputting the cutting fluid between the two. In the process of lifting the annular cavity 206, the inner hole rotation source 2022 can also be started to make the inner hole rotation source 2022 drive the hollow tube 2025 and the annular cavity 206 to rotate, so that the annular cavity 206 rotates and moves up and down inside the bottom hole, thereby further improving the surface quality of the bottom hole of the stepped hole 301. At this time, the pumping port 20261 is located at the bottom of the annular cavity 206, and the cutting fluid is extracted under the control of the pumping drive source 20242, further preventing the cutting fluid from flowing into the bottom of the stepped hole 301. In this process, the chuck 2012 always presses down to limit the plate 3; like Fig.17As shown, when the secondary drill bit 106 has finished its work, the drilling drive source 20521 is stopped, and the annular cavity part 206 is deflated under the control of the inflation drive source 20241. The annular cavity part 206 drives the hollow tube 2025 to rise along with the up and down push source 202. At this time, the mounting cavity 201 and the chuck body 204 also rise synchronously, and then the clamping drive source 2042 is reversed to release the clamping claw 20433 from the secondary drill bit 106, and the clamping claw 20433 moves away from the secondary drill bit 106 along with the mounting cavity 201. Then, the drill bit rotation source 103 is rotated to make the secondary reamer 107 move toward the secondary drill bit 106. The tube 2041 should be penetrated, so that the installation cavity 201 is moved downward, the tube 2041 is sleeved on the top of the secondary reamer 107, and the claw 20433 at the bottom of the tube 2041 clamps the top of the secondary reamer 107 under the control of the clamping drive source 2042, so that the drilling drive source 20521 is rotated, and the secondary reamer 107 is rotated accordingly, and then the upper limiting circular plate 20251 and the lower limiting circular plate 20253 at the bottom of the movable seat 2052 pass through the through slot 3 1071 and enter the originally drilled hole, and then the annular cavity 206 is inflated, so that When the secondary reamer 107 reams the top hole of the stepped hole 301, the annular cavity 206 expands inside the bottom hole, so that the annular cavity 206 contacts the inner wall of the bottom hole of the stepped hole 301, and then the annular cavity 206 rotates up and down inside the bottom hole, thereby facilitating chip removal during the working process of the secondary reamer 107 and avoiding excessive accumulation of cutting fluid containing chip fragments at the bottom of the stepped hole 301 during the cutting process of the secondary reamer 107. When the secondary reamer 107 completes the reaming, the height control source 205 drives the installation cavity 201 and the secondary reamer 107 to rise. During the lifting process of 7, the upper and lower driving sources 202 control the movable seat 2052 to be lifted accordingly, and during the lifting process of the movable seat 2052, the annular cavity member 206 expands under the inflation of the inflation driving source 20241 and contacts the inner wall of the reamed hole of the secondary reamer 107, so that during the lifting of the movable seat 2052, the annular cavity member 206 in contact with the inner wall of the reamed hole of the secondary reamer 107 will scrape the chips inside the reamed hole processed by the secondary reamer 107 during the lifting, thereby improving the cleanliness of the inside of the reamed hole. During this process, the chuck 2012 always presses down to limit the plate 3.

[0040] Summary: Through the alternating operation of the primary drill 104, the primary reamer 105, the secondary drill 106 and the secondary reamer 107, a stepped hole 301 of a certain depth is formed, and during the rotation and up and down movement of the ring cavity 206, the residual cutting fluid containing chips in the stepped hole 301 is reduced, and the stability of drilling and reaming is improved through the inflated axial buffer of the ring cavity 206 and the radial buffer cooperation of the cross rod 1032 and the buffer 1038.

Claims

1. An aircraft joint reaming device, comprising: A main body unit (1), the main body unit (1) comprising a base (101), a primary drill bit (104), a primary reamer (105), a secondary drill bit (106) and a secondary reamer (107) being rotatably arranged on the top of the base (101), characterized in that it further comprises: A reaming unit (2), wherein the reaming unit (2) is arranged on the top of the base (101); The reaming unit (2) comprises a chuck body (204) rotatably arranged on the top of the base (101); a through tube (2041) is arranged in the middle of the chuck body (204); a clamping claw (20433) is arranged at the bottom of the chuck body (204); a hollow tube (2025) is movably arranged inside the through tube (2041); an inflatable annular cavity (206) is arranged at the bottom of the hollow tube (2025); and the annular cavity (206) for relieving vibration and assisting chip removal is arranged inside the stepped hole (301).

2. The aircraft joint reaming device according to claim 1, characterized in that: The main body unit (1) further comprises a processing surface (1011), wherein the processing surface (1011) is mounted on the middle top of the base (101), a main arm (102) is mounted on the side top of the base (101), and a plate (3) is provided on the top surface of the processing surface (1011); A drill bit rotation source (103) is installed on the top surface of the base (101); an output shaft of the drill bit rotation source (103) movably passes through the processing surface (1011) and is fixedly connected to the bottom panel (1031); a cross vertical rod (1032) is fixedly connected to the top of the bottom panel (1031); an inner cross cylinder (1033) is movably sleeved on the surface of the cross vertical rod (1032); An elastic member (1034) is sleeved on the surface of the cross vertical rod (1032), and the elastic member (1034) is arranged between the bottom panel (1031) and the inner cross cylinder (1033). A buffer member (1038) is installed on the top of the outer plate of the bottom panel (1031), and the top of the buffer member (1038) is fixedly connected to the outer plate of the bottom of the inner cross cylinder (1033).

3. The aircraft joint reaming device according to claim 2, characterized in that: The surface of the inner cross cylinder (1033) is provided with four extended arm plates (10331) along its circumferential direction, the outer sides of the extended arm plates (10331) are movably connected to the rotating member (1035) via mounting grooves on their surfaces, a clamping plate (1036) is installed on the surface of the rotating member (1035), and a threaded block (1037) is symmetrically arranged at the center of the clamping plate (1036); A mounting hole is provided at a position corresponding to the center of the line connecting the symmetrically arranged threaded blocks (1037) on the surface of the clamping plate (1036), and the mounting hole passes through the clamping plate (1036), the rotating member (1035) and the extension arm plate (10331) in sequence. The outer sides of the four extension arm plates (10331) are respectively mounted through the mounting hole and the primary drill bit (104), the primary reamer (105), the secondary drill bit (106) and the secondary reamer (107), and are rotated and tightened with bolts inside the threaded blocks (1037).

4. The aircraft joint reaming device according to claim 3, characterized in that: A nozzle (108) is installed at the bottom of the outer side of the extended arm plate (10331); A top hole (1041) is provided at the top of the primary drill bit (104), a through slot 1 (1051) is provided through the middle of the primary reamer (105) and extends downwardly therethrough, a through slot 2 (1061) is provided through the middle of the secondary drill bit (106) and extends downwardly therethrough, and a through slot 3 (1071) is provided through the middle of the secondary reamer (107), wherein the diameter of the through slot 2 (1061) is smaller than the outer diameter of the primary reamer (105).

5. The aircraft joint reaming device according to any one of claims 2 to 4, characterized in that: An inner plate (1021) is installed inside the main arm (102), a height control source (205) is installed on the top of the inner plate (1021), a screw rod (2051) is rotatably arranged between the inner plate (1021) and the bottom surface inside the main arm (102), an auxiliary rod (2053) is symmetrically arranged on the outside of the screw rod (2051), and a movable seat (2052) is movably arranged on the surface of the screw rod (2051) and the auxiliary rod (2053); A drilling drive source (20521) is installed on the surface of the movable seat (2052) located inside the main arm (102); an output shaft of the drilling drive source (20521) passes through the movable seat (2052) and is movably connected to the active member (20522); a vertical opening is provided on the surface of the main arm (102); a portion of the movable seat (2052) passing through the vertical opening is fixedly connected to the installation cavity (201).

6. The aircraft joint reaming device according to claim 5, characterized in that: The bottom of the installation cavity (201) is fixedly connected to an inner ring plate (203), the inner part of the inner ring plate (203) is rotatably clamped with a retaining ring groove (20411), the bottom of the retaining ring groove (20411) is fixedly connected to a driven member (20412), the active member (20522) is transmission-connected to the driven member (20412) via a transmission member (2031), and the bottom of the driven member (20412) is fixedly connected to a chuck body (204).

7. The aircraft joint reaming device according to claim 5, characterized in that: A push-and-clamp power source (2011) is fixedly connected inside the installation cavity (201), and an output shaft of the push-and-clamp power source (2011) movably passes through the installation cavity (201) and is fixedly connected to the clamp (2012); The top of the installation cavity (201) is fixedly connected to a back plate (2013), and the surface of the back plate (2013) is fixedly connected to an up and down pushing source (202).

8. The aircraft joint reaming device according to claim 7, characterized in that: The bottom of the output shaft of the up-and-down pushing source (202) is fixedly connected to a connecting block (2021); the output shaft of the up-and-down pushing source (202) is fixedly connected to the top of the inner hole rotating source (222) via the connecting block (2021); the output shaft of the inner hole rotating source (2022) is fixedly connected to an upper circular plate (2023); and the upper circular plate (2023) is fixedly connected to a lower circular plate (2024) via a semicircular tube (20252); The bottom of the lower circular plate (2024) is fixedly connected to a hollow tube (2025), the inner side of the lower circular plate (2024) extends through a semicircular tube (20252) to pass through the hollow tube (2025) and is fixedly connected to the lower limiting circular plate (20253), and the portion of the semicircular tube (20252) located inside the hollow tube (2025) is fixedly connected to the inner wall of the hollow tube (2025).

9. The aircraft joint reaming device according to claim 8, characterized in that: An upper limiting circular plate (20251) is provided at the top of the lower limiting circular plate (20253) corresponding to the surface of the hollow tube (2025), an annular cavity component (206) is installed between the upper limiting circular plate (20251) and the lower limiting circular plate (20253), and the inner side of the annular cavity component (206) is fixedly connected to the surface of the semicircular tube (20252); An air guide tube (2027) is conductively arranged at the top of the annular cavity (206), the air guide tube (2027) passes through the semicircular tube (20252) and is connected to the inflation drive source (20241), a pumping tube (2026) is provided in the middle of the hollow tube (2025), the pumping tube (2026) is conductively connected to a pumping port (20261) at the bottom end of the middle of the hollow tube (2025), and the top of the pumping tube (2026) is conductively connected to the pumping drive source (20242); The annular cavity component (206) is made of a rubber material and has a silicon carbide coating adhered to its surface.

10. The aircraft joint reaming device according to claim 6, characterized in that: A spiral disk (2043) is rotatably arranged inside the chuck body (204), a bevel gear ring (20431) is arranged on the outer ring of the top of the spiral disk (2043), a bevel gear ring (20421) is meshedly connected to the top of the bevel gear ring (20431), and the bevel gear (20421) is fixedly connected to the output shaft of the clamping drive source (2042); The clamping drive source (2042) is fixedly mounted inside the chuck body (204); the bottom surface of the spiral disk (2043) is provided with a threaded surface (20432); the surface of the threaded surface (20432) is engaged with the thread on the top of the clamping claw (20433) through a thread; the clamping claw (20433) is movably engaged with the bottom of the chuck body (204).

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