Quick change chuck for large radial drill

Abstract

The application discloses a quick change part chuck for a large rocker arm drilling machine, and particularly relates to the technical field of machining equipment, which comprises a chuck assembly and a mounting support assembly, the chuck assembly is rotationally arranged on the mounting support assembly, the chuck assembly comprises a chuck body, a plurality of main clamping jaws are arranged on the chuck body, a vice clamping jaw is arranged at the position corresponding to each main clamping jaw on the chuck body, the vice clamping jaw is located at the inner side of each main clamping jaw, a first clamping part and a second clamping part are arranged on the vice clamping jaw, the first clamping part is arranged in the direction close to the center point of the chuck body, and the second clamping part is arranged in the direction close to the main clamping jaw. The application can realize the synchronous fixing of the workpiece and the drilling guide tool during actual machining, and then the drill bit can be stably guided by the guide hole during actual drilling machining, the drilling stability of the drill bit on the inclined surface is improved, the drilling precision is improved, the damage of the drill bit is reduced, and the production cost is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of machining equipment, more particularly, the present application relates to a quick change chuck for large radial drilling machine. BACKGROUND

[0002] Drilling machine is a metal cutting machine tool mainly used for machining circular holes on workpieces. Among them, in the industrial processing system, large radial drilling machine is a high rigidity and large stroke vertical drilling machine specially designed for machining multiple holes and deep holes on large and heavy workpieces. It is widely used in mechanical manufacturing, shipbuilding, power, metallurgy, petrochemical industry, heavy equipment and aerospace industries.

[0003] Among them, for some special workpieces, the traditional bench vice type clamping processing efficiency is low, and the overall cost of replacing new intelligent processing equipment is high. Therefore, in order to adapt to the processing of some workpieces, only part of the clamping structure needs to be improved. For example, for some cylindrical workpieces such as shafts, pipes and discs, chuck structure is used to clamp the workpiece. Especially when there are relatively more holes to be machined on the workpiece, the workpiece can be automatically positioned and drilled by rotating the chuck, effectively improving the processing efficiency.

[0004] However, for some workpieces with inclined structures on their surfaces, such as the top of the workpiece is formed with a conical surface, but due to structural requirements, drilling needs to be performed on the conical surface. For ordinary inclined surface drilling, the specific fixture of the workpiece is used, and the guide sleeve structure is used for guiding, so that the drilling is stable. However, for the above-mentioned cylindrical and cylindrical parts, the clamping jaw of the chuck has been used to fix the workpiece. Since the workpiece needs to be rotated, the upper part cannot be blocked, so that the traditional guide sleeve structure is not easy to be fixed above the workpiece. During actual processing, the drill bit is easy to be affected by the inclined surface, resulting in deviation or even damage, which affects the processing accuracy of the workpiece. SUMMARY

[0005] The quick change chuck for large radial drilling machine provided by the present application solves the problem that the guide sleeve structure is not easy to be fixed above the workpiece during drilling and machining of the workpiece clamped by the existing chuck. During actual processing, the drill bit is easy to be affected by the inclined surface, resulting in deviation or even damage, which affects the processing accuracy of the workpiece.

[0006] In order to achieve the above object, the present application provides the following technical scheme: A quick change chuck for large radial drilling machine, comprising a chuck assembly and a mounting support assembly, the chuck assembly is rotatably arranged on the mounting support assembly, the chuck assembly comprises a chuck body, a plurality of main clamping jaws are arranged on the chuck body, the main clamping jaws are slidably arranged along the radial direction of the chuck body, a first clamping driver is arranged in the chuck body, a sub-clamping jaw is arranged on the chuck body corresponding to the position of each main clamping jaw, the sub-clamping jaw is located at the inner side of each main clamping jaw, a second clamping driver is further arranged on the chuck body, the second clamping driver is used to drive the sub-clamping jaw to move along the radial direction of the chuck body, the sub-clamping jaw is provided with a first clamping part and a second clamping part, the first clamping part is arranged corresponding to the direction close to the center point of the chuck body, and the second clamping part is arranged corresponding to the direction close to the main clamping jaw.

[0007] Preferably, the second clamping driver is a threaded rod, and the threaded rod is rotatably installed on the sub-clamping jaw.

[0008] Preferably, the main clamping jaw is slidably provided with an elastic buffer block, the elastic buffer block slides along the radial direction of the chuck body, the threaded rod slides relative to the main clamping jaw without interference, the threaded rod penetrates through the elastic buffer block and is threadedly connected with the elastic buffer block, and elastic supporting members are arranged between the two ends of the elastic buffer block and the main clamping jaw.

[0009] Preferably, the main clamping jaw is provided with a top pressing assembly, the top of the elastic buffer block is provided with a V-shaped groove, the top pressing assembly comprises a top column, the top column is slidably arranged in the main clamping jaw, a rotating adjusting rod is rotatably installed in the inside of the top column, a pressing head is fixedly connected to the bottom end of the rotating adjusting rod, and the pressing head is matched with the V-shaped groove.

[0010] Preferably, the main clamping jaw is further fixedly provided with a piston cylinder, a first piston member is fixedly installed on the top column, the first piston member is slidably arranged in the piston cylinder, and an oil injection pipe is further connected to the piston cylinder.

[0011] Preferably, the oil injection equipment is a manual supercharger, the manual supercharger comprises an oil injection cylinder, the oil injection cylinder is fixedly installed on the chuck body, a second piston member is slidably arranged in the oil injection cylinder, a threaded column is rotatably installed on the second piston member, the threaded column penetrates through the top end of the oil injection cylinder and is threadedly connected with the oil injection cylinder, the oil injection cylinder stores hydraulic oil, and an oil delivery pipe is arranged on the oil injection cylinder and is used to be connected in communication with the oil injection pipe.

[0012] Preferably, a plurality of buffer guide members are arranged on the main clamping jaw corresponding to the clamping area of the main clamping jaw, the buffer guide member comprises an elastic top rod and a guide cylinder, the guide cylinder is embeddedly installed in the inside of the main clamping jaw, the elastic top rod is slidably arranged in the guide cylinder, and an elastic buffer member is arranged between the elastic top rod and the guide cylinder, the elastic buffer member is used to provide the elastic top rod with an elastic force for moving to the outside of the guide cylinder, and a ball is embeddedly installed on the outer end of the elastic top rod.

[0013] Preferably, the oil injection device is a buffer guide, a third piston member is fixedly installed on the elastic ejector rod, the third piston member is slidingly installed in the guide cylinder, the guide cylinder stores hydraulic oil, a confluence cavity is arranged in the main jaw, each guide cylinder is communicated with the confluence cavity, and the confluence cavity is in butt joint communication with the oil injection pipe through a hydraulic oil pipe.

[0014] Preferably, the first clamping part and the second clamping part are movably installed on the auxiliary jaw, the regions corresponding to the first clamping part and the second clamping part on the auxiliary jaw are provided with inclined installation grooves, inclined insertion blocks are fixedly connected to the first clamping part and the second clamping part, the inclined insertion blocks are slidingly installed in the inclined installation grooves, the inclined installation grooves are gradually inclined downward from outside to inside, and elastic connecting members are arranged between the first clamping part and the auxiliary jaw and between the second clamping part and the auxiliary jaw.

[0015] Preferably, the installation support assembly is installed on the drilling machine assembly, the drilling machine assembly mainly comprises a drilling machine part and a machining table part, the installation support assembly is fixedly installed on the machining table part, the chuck body is rotatably installed on the installation support assembly, and a rotation driver for driving the chuck body to rotate is arranged on the installation support assembly.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. The present application can realize synchronous fixing of a workpiece and a drilling guide tool during actual machining, and then can stably guide a drill bit by means of a guide hole during actual drilling machining, improve drilling stability of the drill bit on an inclined surface, improve drilling precision, reduce damage of the drill bit, and effectively reduce production cost.

[0018] 2. The present application cooperates the buffer guide with the top pressing assembly, and pre-adjusts relative positions of the auxiliary jaw and the main jaw for mass production of the same type of product during actual operation, and then keeps the relative positions unchanged, so that clamping of the auxiliary jaw can be controlled synchronously by controlling clamping of the main jaw during subsequent clamping, thereby effectively reducing operation steps and improving convenience of equipment use.

[0019] 3、 The scheme provided by the present application is mainly based on improvement of the existing chuck structure, and the improvement is mainly concentrated on the clamping jaw structure, without replacing too many structures, low cost, and high practicability. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0021] Figure 2 It is a schematic diagram of the chuck assembly of the present application;

[0022] Figure 3 It is a schematic diagram of the structure of the drilling guide tool equipped based on the small-diameter workpiece of the present application;

[0023] Figure 4 It is a schematic diagram of the structure of the drilling guide tool equipped based on the large-diameter workpiece of the present application;

[0024] Figure 5 It is a schematic diagram of the structure of the chuck assembly when drilling the small-diameter workpiece of the present application;

[0025] Figure 6 It is a cooperation state diagram of the single set of main clamping jaw and auxiliary clamping jaw of the present application;

[0026] Figure 7 It is a state diagram when the auxiliary clamping jaw clamps the convex column type clamping part during drilling based on the small-diameter workpiece of the present application;

[0027] Figure 8 It is a state diagram when the auxiliary clamping jaw clamps the sleeve type clamping part during drilling based on the large-diameter workpiece of the present application;

[0028] Figure 9 It is a schematic diagram of the structure of the main clamping jaw after adding the elastic buffer block in the main clamping jaw of the present application;

[0029] Figure 10 It is a schematic diagram of the structure of the locking assembly for locking the elastic buffer block of the present application;

[0030] Figure 11 It is a state diagram when the elastic buffer block moves to one side after the top column is pressed and cooperates with the V-shaped groove of the present application;

[0031] Figure 12 It is a state diagram when the elastic buffer block moves to the other side after the top column is pressed and cooperates with the V-shaped groove after adjusting the orientation of the pressing head of the present application;

[0032] Figure 13 It is a top view of the chuck assembly after adding the locking assembly of the present application;

[0033] Figure 14 It is a schematic diagram of the structure of the manual type pressure booster of the present application;

[0034] Figure 15 Structure diagram of the main chuck jaw after adding the buffer guide in the clamping area of the main chuck jaw of the present application;

[0035] Figure 16 Structure diagram of the internal structure of the main chuck jaw after improving the buffer guide to increase the pressure of the pressing assembly of the present application;

[0036] Figure 17 Structure diagram of the improved structure of the auxiliary chuck jaw of the present application.

[0037] The reference signs are as follows: 1, chuck assembly; 11, chuck body; 12, main chuck jaw; 121, converging cavity; 13, auxiliary chuck jaw; 131, first clamping part; 132, second clamping part; 133, oblique installation slot; 134, oblique insertion block; 135, elastic connecting piece; 14, second clamping driver; 141, threaded rod; 15, first clamping driver; 16, elastic buffer block; 161, elastic support piece; 162, V-shaped groove; 2, installation support assembly; 21, rotating driver; 3, drilling machine assembly; 31, drilling machine part; 32, machining table part; 33, drill bit; 4, workpiece; 41, conical surface; 5, drilling guide tool; 51, guide hole; 52, protrusion column type clamping part; 53, sleeve type clamping part; 6, pressing assembly; 61, pressing column; 611, pressing head; 612, rotating adjusting rod; 62, piston cylinder; 621, oil injection pipe; 63, first piston piece; 7, manual type pressure increaser; 71, oil injection cylinder; 72, second piston piece; 73, threaded column; 74, oil delivery pipe; 8, buffer guide; 81, elastic pressing rod; 811, ball; 82, guide cylinder; 83, elastic buffer piece; 84, third piston piece. DETAILED DESCRIPTION

[0038] It is necessary to point out here that the following detailed description is only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0039] The accompanying drawings are referred to in the description of the present application. Figure 1 and Figure 2The utility model provides a quick change spare chuck for large radial drilling machine, including chuck assembly 1 and installation support assembly 2 (namely mounting bracket), chuck assembly 1 rotationally arranged on installation support assembly 2, and installation support assembly 2 is installed on drilling machine assembly 3, wherein, drilling machine assembly 3 mainly includes drilling machine part 31 and processing platform part 32, and drilling head 33 is arranged on drilling machine part 31 (the drilling machine assembly 3 used in the embodiment is mainly large radial drilling machine commonly used in industrial production, and the specific structure is all public technique, therefore, the specific composition of drilling machine assembly 3 is not explained too much in the embodiment), and installation support assembly 2 is fixedly installed on processing platform part 32, wherein, chuck assembly 1 includes chuck body 11, chuck body 11 is rotatably installed on installation support assembly 2, and the rotation driver 21 for driving chuck body 11 is arranged on installation support assembly 2 (for example, the combination of motor and turbine worm or gear transmission system, to realize the automatic rotation drive of workpiece), and a plurality of main clamping jaws 12 are arranged on chuck body 11, and the main clamping jaw 12 is slidably arranged along the radial direction of chuck body 11, and the first clamping driver 15 for driving the synchronous motion of each group of main clamping jaws 12 is arranged in chuck body 11.

[0040] In the embodiment, the main structure of chuck assembly 1 is the same as that of the conventional chuck, therefore, for the driving of each chuck body 11, a simple disc silk (a disc with a plane Archimedes spiral line on the end face) structure can be used as the first clamping driver 15, the main clamping jaw 12 has a matching thread below, the thread of the main clamping jaw 12 is embedded in the spiral groove of the disc silk, the corresponding small bevel gear is driven to rotate by the chuck wrench, and then the disc silk is driven to rotate by the large bevel gear on the disc silk, to realize the movement driving of each main clamping jaw 12, and then the workpiece is clamped and released, in addition, the first clamping driver 15 can also be a driving system in an automatic chuck structure such as a pneumatic chuck or a hydraulic chuck, and the embodiment will not be explained too much.

[0041] Unlike the conventional chuck, in the utility model, referring to the drawings Figure 2 and Figure 6 , the vice clamping jaw 13 is arranged at the position corresponding to each main clamping jaw 12 on the chuck body 11, the vice clamping jaw 13 is located at the inner side position of each main clamping jaw 12 (i.e. closer to the center point of the chuck body 11), and the second clamping driver 14 is further arranged on the chuck body 11, the second clamping driver 14 is used for driving the radial movement of the vice clamping jaw 13 on the chuck body 11, the first clamping part 131 and the second clamping part 132 are arranged on the vice clamping jaw 13, the first clamping part 131 is arranged in the direction close to the center point of the chuck body 11, and the second clamping part 132 is arranged in the direction close to the main clamping jaw 12.

[0042] In addition, unlike the conventional drill sleeve, in the utility model, the corresponding drilling guide tool 5 is arranged for the workpiece 4, for example, referring to the drawings Figure 3 andFigure 4 The top of the workpiece 4 is provided with a tapered surface 41, and the drilling guide tool 5 is correspondingly provided with the tapered surface 41. A plurality of guide holes 51 are arranged on the drilling guide tool 5, and the guide holes 51 are used for guiding the drilling of the drill bit 33. In the above scheme, the workpiece 4 is mainly in a circular tube or disc structure, and the drilling guide tool 5 can extend downward to form a downward portion at the central region of the workpiece 4. Therefore, in the above scheme, the main clamping jaw 12 is used for clamping the workpiece 4, and the auxiliary clamping jaw 13 is located at the inner side region to clamp the downward portion of the drilling guide tool 5. For a workpiece 4 with a smaller diameter, refer to the accompanying drawings Figure 3 A protruding column type clamping portion 52 can be arranged at the bottom of the drilling guide tool 5, and the protruding column type clamping portion 52 extends downward. When clamping, refer to the accompanying drawings Figure 7 The outer wall of the workpiece 4 is clamped by the main clamping jaw 12, and the protruding column type clamping portion 52 is clamped by the auxiliary clamping jaw 13, so as to fix the workpiece 4 and the drilling guide tool 5. When actually drilling, refer to the accompanying drawings Figure 5 The drill bit 33 is controlled to descend along the corresponding guide hole 51 to drill, so as to stably guide the drill bit 33 and improve the drilling precision. When a hole is drilled, the chuck body 11 drives the workpiece 4 to rotate by a certain angle, so as to make another region to be processed of the workpiece 4 reach the drill bit 33 for continuous drilling processing, without the need of moving the drilling machine portion 31, thereby effectively improving the processing efficiency.

[0043] For some workpieces 4 with a larger diameter, the middle space region is larger. If the drilling guide tool 5 still adopts the structure of the protruding column type clamping portion 52 for fixation, the drilling guide tool 5 will be heavy. Therefore, refer to the accompanying drawings Figure 4 The drilling guide tool 5 can also be provided in a cylindrical structure and be inserted into the workpiece 4. The bottom of the drilling guide tool 5 is provided with a sleeve type clamping portion 53. Refer to the accompanying drawings Figure 8 When actually clamping, the outer wall of the workpiece 4 is clamped by the main clamping jaw 12, and the inner wall of the sleeve type clamping portion 53 is clamped by the auxiliary clamping jaw 13, so as to stably fix the workpiece 4 and the drilling guide tool 5.

[0044] By adopting the above scheme, the workpiece 4 and the drilling guide tool 5 can be fixed synchronously during actual processing, the drilling guide tool 5 is adapted to the conical surface 41 and stably contacts the workpiece 4 during fixing, and then the relative stability between the workpiece 4 and the drilling guide tool 5 can be ensured after the main jaw 12 and the auxiliary jaw 13 form the fixing on the workpiece 4 and the drilling guide tool 5, and then the drilling bit 33 can be stably guided by the guide hole 51 during actual drilling processing, the drilling stability of the drilling bit 33 on the inclined surface is improved, the drilling precision is improved, the damage of the drilling bit 33 is reduced, and then the production cost is effectively reduced, and for the workpiece 4 which needs to process more hole positions, after the position of the workpiece 4 is initially adjusted, the workpiece 4 can be automatically repositioned by only controlling the rotation of the chuck body 11 during processing of each hole, and the processing efficiency is further improved, and the auxiliary jaw 13 provided in the embodiment has the first clamping part 131 and the second clamping part 132, which can select the moving mode and the clamping position of the auxiliary jaw 13 according to different needs during actual use, and then the processing needs of various workpieces can be adapted, and the fixture cost is effectively reduced.

[0045] It should be noted that the above is only one of the descriptions of the cooperation of the main jaw 12 and the auxiliary jaw 13 in the application, and the core principle is to form the fixing of the two groups of structures by the two groups of clamping jaws respectively, so for some solid workpieces 4 or the case that the conical surface 41 is on the outside of the workpiece 4, the positions of the workpiece 4 and the drilling guide tool 5 can also be exchanged, for example, the drilling guide tool 5 is arranged on the outside of the workpiece 4.

[0046] In the above embodiment, the second clamping driver 14 can adopt a similar disc filament structure as the first clamping driver 15 to form two-stage control, or can adopt various automatic structures, but considering the improvement cost, the following technical scheme is also provided in the embodiment, that is, referring to the drawings Figure 6 The second clamping driver 14 is a threaded rod 141, the threaded rod 141 is rotatably installed on the auxiliary jaw 13, the threaded rod 141 penetrates through the corresponding main jaw 12 and is in threaded connection with the internal structure of the main jaw 12, so that during actual use, the movement of the auxiliary jaw 13 can be adjusted by rotating the threaded rod 141, and then the clamping of the auxiliary jaw 13 is realized.

[0047] For example, taking the drilling guide tool 5 with the protruding column type clamping part 52 as an example, referring to the drawings Figure 7, before actual clamping, according to the actual structure size of the drilling guide tool 5 and the workpiece 4, the threaded rod 141 is rotated in advance to adjust the position of the sub-claw 13 relative to the main claw 12, after the workpiece 4 and the drilling guide tool 5 are placed, the main claw 12 is controlled to be clamped inward, so that the sub-claw 13 is also clamped to the convex column type clamping part 52, and for the drilling guide tool 5 with the sleeve type clamping part 53, refer to the description Figure 8 The sub-claw 13 can be adjusted to move inward in advance, after the workpiece 4 and the drilling guide tool 5 are placed, the main claw 12 is controlled to clamp the workpiece 4, and then the sub-claw 13 is adjusted to move outward to clamp the inner wall of the sleeve type clamping part 53.

[0048] In the above scheme, for the drilling guide tool 5 with the convex column type clamping part 52 and similar cases, it is more convenient, but for the drilling guide tool 5 with the sleeve type clamping part 53 and similar cases, it is relatively complex in actual operation, and it is not convenient to replace the workpiece 4, but the above scheme only needs to be simply improved to the main claw 12, and the cost is relatively low, but in order to replace the workpiece 4 more conveniently, the embodiment also provides the following technical scheme, refer to the description Figure 9 The elastic buffer block 16 is slidably installed in the main claw 12, the elastic buffer block 16 slides along the radial direction of the chuck body 11, the threaded rod 141 slides relative to the main claw 12 without interference, the threaded rod 141 penetrates the elastic buffer block 16 and is threadedly connected with the elastic buffer block 16, elastic support members 161 (such as spring structures) are arranged between the two ends of the elastic buffer block 16 and the main claw 12, and the top of the first clamping part 131 and the top of the second clamping part 132 are provided with slope structures.

[0049] In actual use, the main claw 12 and the sub-claw 13 can be adjusted in advance to approach the actual clamping position, but a small gap needs to be reserved, at this time, the workpiece 4 and the drilling guide tool 5 are placed downward at the same time, at this time, the sleeve type clamping part 53 or the convex column type clamping part 52 gradually enters the clamping space through the second clamping part 132 or the first clamping part 131, and the top slope, and extrudes the sub-claw 13, at this time, the sub-claw 13 can be slightly moved by the elastic force of the elastic support member 161, and then the drilling guide tool 5 is extruded and fixed by the elastic force, and then the main claw 12 is further adjusted to completely clamp the workpiece 4.

[0050] Since the workpiece 4 and the drilling guide tool 5 are tightly matched, only a relatively small clamping force needs to be provided to the drilling guide tool 5 to make the drilling guide tool 5 relatively stable, and by adopting the above scheme, for the same batch of workpieces 4, only the sub-claw 13 needs to be adjusted in advance, so that the workpiece 4 can be quickly replaced, and the machining efficiency is effectively improved.

[0051] In addition, for some large workpieces, higher stability clamping is required during processing, therefore, on the premise of being able to quickly disassemble the workpiece 4, the embodiment also provides the following technical solutions, specifically, referring to the drawings attached to the specification Figure 10 and Figure 11 The top of the elastic buffer block 16 is provided with a V-shaped groove 162, that is, the top of the elastic buffer block 16 has two slopes, the top pressing assembly 6 includes a top column 61, the top column 61 is slidingly arranged in the main clamping jaw 12, a rotating adjusting rod 612 is rotatably arranged in the inside of the top column 61, a pressure head 611 is fixedly connected to the bottom end of the rotating adjusting rod 612, the pressure head 611 is matched with the slope of the V-shaped groove 162, when the top column 61 slides towards the elastic buffer block 16, the pressure head 611 slides in contact with the corresponding slope of the V-shaped groove 162 and forms extrusion, which pushes the elastic buffer block 16 to move, and the position and orientation of the pressure head 611 are adjusted by rotating the rotating adjusting rod 612, referring to the drawings attached to the specification Figure 11 and Figure 12 The actual action direction of the elastic buffer block 16 when the top column 61 presses can be selected.

[0052] For the movement and pressing control of the top column 61, an automatic driving device can be used, or a low-cost manual control structure can be used, for example, the main clamping jaw 12 is also fixedly provided with a piston cylinder 62, a first piston piece 63 is fixedly arranged on the top column 61, the first piston piece 63 is slidingly arranged in the piston cylinder 62, and an oil injection pipe 621 is further connected to the piston cylinder 62, the oil injection pipe 621 is connected to an oil injection device, and by injecting hydraulic oil into the piston cylinder 62, the top column 61 can be controlled to press the V-shaped groove 162.

[0053] It should be noted that in the above scheme, the threaded rod 141 forms a coarse adjustment device, and the position of the secondary clamping jaw 13 is roughly adjusted in advance, and the cooperation of the top pressing assembly 6 and the elastic buffer block 16 forms a fine adjustment device, after the initial adjustment of the main clamping jaw 12 and the secondary clamping jaw 13, the workpiece 4 and the drilling guide tool 5 are prevented, and then the main clamping jaw 12 is controlled to clamp the workpiece 4, at this time, the secondary clamping jaw 13 forms a pre-clamping on the drilling guide tool 5 by means of the elastic force of the elastic support piece 161, at this time, by controlling the top column 61 of each group of top pressing assemblies 6 to descend, the pressure head 611 extrudes the V-shaped groove 162, that is, the elastic buffer block 16 Each secondary clamping jaw 13 is further moved to form a complete clamping on the drilling guide tool 5.

[0054] The oil injection device of the piston cylinder 62 can use an oil pump or a simple control device, for example, referring to the drawings attached to the specification Figure 13 and Figure 14The oil injection equipment can be a manual supercharger 7, the manual supercharger 7 comprises an oil injection cylinder 71 fixedly installed on the chuck body 11, a second piston piece 72 slidingly installed in the oil injection cylinder 71, a threaded column 73 rotatably installed on the second piston piece 72, the threaded column 73 penetrating through the top end of the oil injection cylinder 71 and being threadedly connected with the oil injection cylinder 71, the oil injection cylinder 71 storing hydraulic oil, and an oil delivery pipe 74 arranged on the oil injection cylinder 71 and used for being connected and communicated with the oil injection pipe 621, so that the hydraulic oil can be injected into the jackscrew 61 by rotating the threaded column 73 to extrude the hydraulic oil in the second piston piece 72.

[0055] Further, in the above embodiment, for the machining of a large number of workpieces 4, the adjustment distance of the main chuck 12 does not need to be too large when the workpiece 4 is replaced each time, and therefore, the workpiece 4 is easy to directly contact the clamping area of the main chuck 12 when the new workpiece 4 is put in each time. In order to avoid wear in the above process, the embodiment further provides the following technical solution, specifically, referring to the accompanying drawings Figure 15 and Figure 16 The main chuck 12 is provided with a plurality of sets of buffer guide pieces 8 corresponding to the positions of the clamping areas thereof, the buffer guide piece 8 comprises an elastic jack 81 and a guide cylinder 82, the guide cylinder 82 is embeddedly installed in the inside of the main chuck 12, the elastic jack 81 is slidingly installed in the guide cylinder 82, an elastic buffer piece 83 (such as a spring) is arranged between the elastic jack 81 and the guide cylinder 82, the elastic buffer piece 83 is used for providing the elastic jack 81 with an elastic force for moving outward of the guide cylinder 82, a ball 811 is embeddedly installed at the outer end of the elastic jack 81, and therefore, in actual use, the elastic jack 81 and the ball 811 can be used for auxiliary supporting and buffer guiding during the process of placing the workpiece 4 downward, so as to reduce the contact wear between the workpiece 4 and the main chuck 12.

[0056] In addition, based on the above buffer guide piece 8 solution, the present application further provides an oil injection equipment capable of automatically injecting oil into the jackscrew 61, that is, a third piston piece 84 is fixedly installed on the elastic jack 81, the third piston piece 84 is slidingly installed in the guide cylinder 82, the guide cylinder 82 stores hydraulic oil, a converging cavity 121 is arranged in the main chuck 12, each guide cylinder 82 is communicated with the converging cavity 121, the converging cavity 121 is connected and communicated with the oil injection pipe 621 through the hydraulic oil pipe, and therefore, in actual use, during the process of controlling the main chuck 12 to further approach the workpiece 4, the workpiece 4 reversely extrudes the elastic jack 81, the hydraulic oil in the guide cylinder 82 is compressed, the jackscrew 61 is pressurized, the jackscrew 61 is driven to descend and form a top pressure on the V-shaped groove 162, and a plurality of sets of buffer guide pieces 8 can be arranged on a single main chuck 12, so as to ensure that the auxiliary chuck 13 has sufficient locking and moving stroke, thereby effectively clamping the drilling guide tool 5.

[0057] Need to explain, through the cooperation of the buffer guide 8 and the top pressure assembly 6, in the actual operation process, for the same type of product in mass production, the relative position of the sub-jaw 13 and the main jaw 12 is adjusted in advance, and then remains unchanged, and only the clamping of the main jaw 12 needs to be controlled in the subsequent clamping process. The clamping of the sub-jaw 13 can be controlled synchronously, thereby effectively reducing the operation steps and improving the convenience of equipment use. When the workpiece 4 needs to be disassembled, only a certain distance of the main jaw 12 needs to be controlled to loosen, and then the workpiece 4 can be taken out upward. Moreover, the scheme provided by the present application is mainly based on the improvement of the existing chuck structure, and the improvement mainly focuses on the clamping jaw structure, without replacing too many structures, thereby being low in cost and high in practicality.

[0058] Further, in the above embodiment, since the drill bit 33 mainly faces the inclined surface of the conical surface 41 type, the drill bit 33 is guided by the drilling guide tool 5. The fitting degree of the drilling guide tool 5 and the workpiece 4 determines the machining quality when the drill bit 33 initially contacts the conical surface 41, that is, the machining quality of the hole edge. Therefore, in order to further improve the machining effect, the sub-jaw 13 is improved as follows in the present embodiment, referring to the drawings attached to the specification Figure 16 And Figure 17 The first clamping part 131 and the second clamping part 132 are movably installed on the sub-jaw 13. The sub-jaw 13 is provided with a diagonal installation groove 133 corresponding to the first clamping part 131 and the second clamping part 132. The first clamping part 131 and the second clamping part 132 are fixedly connected with a diagonal plug 134, and the diagonal plug 134 is slidably installed in the diagonal installation groove 133. The diagonal installation groove 133 is gradually inclined downward from outside to inside. The first clamping part 131 and the second clamping part 132 are provided with elastic connecting pieces 135 (such as rubber pads) between the sub-jaw 13.

[0059] Need to explain, through the adoption of the above scheme, when the drilling guide tool 5 is fixed, that is, the top pressure assembly 6 drives the elastic buffer block 16 to make the sub-jaw 13 further move and clamp, the first clamping part 131 or the second clamping part 132 is reversely extruded by the drilling guide tool 5, which will produce a slight movement. Under the guidance of the diagonal installation groove 133, the first clamping part 131 or the second clamping part 132 forms a downward pressure on the drilling guide tool 5, thereby further improving the fitting precision of the drilling guide tool 5 and the conical surface 41, making the drilling guide tool 5 fully extrude the conical surface 41, so as to improve the forming quality of the hole region on the surface of the conical surface 41.

[0060] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the protection scope of the present application.

Claims

1. A quick change chuck for large radial drill, comprising a chuck assembly (1) and a mounting support assembly (2), the chuck assembly (1) is rotatably arranged on the mounting support assembly (2), the chuck assembly (1) comprises a chuck body (11), a plurality of sets of main clamping jaws (12) are arranged on the chuck body (11), the main clamping jaws (12) are slidingly arranged along the radial direction of the chuck body (11), a first clamping driver (15) is arranged in the chuck body (11), characterized in that: The chuck body (11) is provided with a sub-chuck (13) corresponding to each main chuck (12), the sub-chuck (13) is located at the inner side of each main chuck (12), the chuck body (11) is further provided with a second clamping driver (14), the second clamping driver (14) is used for driving the sub-chuck (13) to move along the radial direction of the chuck body (11), the sub-chuck (13) is provided with a first clamping part (131) and a second clamping part (132), the first clamping part (131) is arranged corresponding to the direction close to the center point of the chuck body (11), and the second clamping part (132) is arranged corresponding to the direction close to the main chuck (12); The second clamping driver (14) is a threaded rod (141), and the threaded rod (141) is rotatably installed on the sub-chuck (13); The main chuck (12) is slidably provided with an elastic buffer block (16), the elastic buffer block (16) slides along the radial direction of the chuck body (11), the threaded rod (141) slides relative to the main chuck (12) without interference, the threaded rod (141) penetrates through the elastic buffer block (16) and is threadedly connected with the elastic buffer block (16), and elastic supporting members (161) are arranged between the two ends of the elastic buffer block (16) and the main chuck (12); The main chuck (12) is provided with a top pressing assembly (6), the top of the elastic buffer block (16) is provided with a V-shaped groove (162), the top pressing assembly (6) comprises a top column (61), the top column (61) is slidably arranged in the main chuck (12), a rotating adjusting rod (612) is rotatably arranged in the top column (61), and a pressing head (611) is fixedly connected to the bottom end of the rotating adjusting rod (612).

2. The quick change chuck for large radial drill according to claim 1, characterized in that: The main chuck (12) is further provided with a piston cylinder (62), a first piston member (63) is fixedly arranged on the top column (61), the first piston member (63) is slidably arranged in the piston cylinder (62), and an oil injection pipe (621) is further connected to the piston cylinder (62).

3. The quick change chuck for large radial drill according to claim 2, characterized in that: The oil injection equipment is a manual supercharger (7), the manual supercharger (7) comprises an oil injection cylinder (71), the oil injection cylinder (71) is fixedly arranged on the chuck body (11), a second piston member (72) is slidably arranged in the oil injection cylinder (71), a threaded column (73) is rotatably arranged on the second piston member (72), the threaded column (73) penetrates through the top end of the oil injection cylinder (71) and is threadedly connected with the oil injection cylinder (71), the oil injection cylinder (71) stores hydraulic oil, and an oil delivery pipe (74) is arranged on the oil injection cylinder (71), and the oil delivery pipe (74) is used for being connected and communicated with the oil injection pipe (621).

4. The quick change chuck for large radial drill according to claim 2, characterized in that: The main claw (12) is provided with a plurality of sets of buffer guides (8) corresponding to the positions of the clamping areas of the main claw (12), the buffer guides (8) comprise elastic top rods (81) and guide cylinders (82), the guide cylinders (82) are embeddedly installed in the interiors of the main claw (12), the elastic top rods (81) are slidingly installed in the guide cylinders (82), elastic buffers (83) are arranged between the elastic top rods (81) and the guide cylinders (82), the elastic buffers (83) are used for providing elastic forces for the elastic top rods (81) to move outward of the guide cylinders (82), and the outer end portions of the elastic top rods (81) are embeddedly installed with ball bearings (811).

5. The quick change chuck for large radial drill according to claim 4, characterized in that: The oil injection equipment is the buffer guide (8), the third piston piece (84) is fixedly installed on the elastic top rod (81), the third piston piece (84) is slidingly installed in the guide cylinder (82), the guide cylinder (82) stores hydraulic oil, the main claw (12) is provided with a confluence cavity (121), each guide cylinder (82) is in communication with the confluence cavity (121), and the confluence cavity (121) is in butt joint communication with the oil injection pipe (621) through a hydraulic oil pipe.

6. The quick change chuck for large radial drill according to claim 5, characterized in that: The first clamping part (131) and the second clamping part (132) are movably installed on the auxiliary claw (13), the auxiliary claw (13) is provided with inclined installation grooves (133) corresponding to the positions of the first clamping part (131) and the second clamping part (132), the first clamping part (131) and the second clamping part (132) are fixedly connected with inclined insertion blocks (134), the inclined insertion blocks (134) are slidingly installed in the inclined installation grooves (133), the inclined installation grooves (133) are gradually inclined downward from outside to inside, and the first clamping part (131) and the auxiliary claw (13) and the second clamping part (132) and the auxiliary claw (13) are provided with elastic connecting pieces (135).

7. The quick change chuck for large radial drill according to any one of claims 1-6, characterized in that: The installation support assembly (2) is installed on the drilling machine assembly (3), the drilling machine assembly (3) comprises a drilling machine part (31) and a machining table part (32), the installation support assembly (2) is fixedly installed on the machining table part (32), the chuck body (11) is rotatably installed on the installation support assembly (2), and the installation support assembly (2) is provided with a rotation driver (21) for driving the chuck body (11) to rotate.

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